Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull target updates from Nicholas Bellinger:
 "It has been a very busy development cycle this time around in target
  land, with the highlights including:

   - Kill struct se_subsystem_dev, in favor of direct se_device usage
     (hch)
   - Simplify reservations code by combining SPC-3 + SCSI-2 support for
     virtual backends only (hch)
   - Simplify ALUA code for virtual only backends, and remove left over
     abstractions (hch)
   - Pass sense_reason_t as return value for I/O submission path (hch)
   - Refactor MODE_SENSE emulation to allow for easier addition of new
     mode pages.  (roland)
   - Add emulation of MODE_SELECT (roland)
   - Fix bug in handling of ExpStatSN wrap-around (steve)
   - Fix bug in TMR ABORT_TASK lookup in qla2xxx target (steve)
   - Add WRITE_SAME w/ UNMAP=0 support for IBLOCK backends (nab)
   - Convert ib_srpt to use modern target_submit_cmd caller + drop
     legacy ioctx->kref usage (nab)
   - Convert ib_srpt to use modern target_submit_tmr caller (nab)
   - Add link_magic for fabric allow_link destination target_items for
     symlinks within target_core_fabric_configfs.c code (nab)
   - Allocate pointers in instead of full structs for
     config_group->default_groups (sebastian)
   - Fix 32-bit highmem breakage for FILEIO (sebastian)

  All told, hch was able to shave off another ~1K LOC by killing the
  se_subsystem_dev abstraction, along with a number of PR + ALUA
  simplifications.  Also, a nice patch by Roland is the refactoring of
  MODE_SENSE handling, along with the addition of initial MODE_SELECT
  emulation support for virtual backends.

  Sebastian found a long-standing issue wrt to allocation of full
  config_group instead of pointers for config_group->default_group[]
  setup in a number of areas, which ends up saving memory with big
  configurations.  He also managed to fix another long-standing BUG wrt
  to broken 32-bit highmem support within the FILEIO backend driver.

  Thank you again to everyone who contributed this round!"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (50 commits)
  target/iscsi_target: Add NodeACL tags for initiator group support
  target/tcm_fc: fix the lockdep warning due to inconsistent lock state
  sbp-target: fix error path in sbp_make_tpg()
  sbp-target: use simple assignment in tgt_agent_rw_agent_state()
  iscsi-target: use kstrdup() for iscsi_param
  target/file: merge fd_do_readv() and fd_do_writev()
  target/file: Fix 32-bit highmem breakage for SGL -> iovec mapping
  target: Add link_magic for fabric allow_link destination target_items
  ib_srpt: Convert TMR path to target_submit_tmr
  ib_srpt: Convert I/O path to target_submit_cmd + drop legacy ioctx->kref
  target: Make spc_get_write_same_sectors return sector_t
  target/configfs: use kmalloc() instead of kzalloc() for default groups
  target/configfs: allocate only 6 slots for dev_cg->default_groups
  target/configfs: allocate pointers instead of full struct for default_groups
  target: update error handling for sbc_setup_write_same()
  iscsit: use GFP_ATOMIC under spin lock
  iscsi_target: Remove redundant null check before kfree
  target/iblock: Forward declare bio helpers
  target: Clean up flow in transport_check_aborted_status()
  target: Clean up logic in transport_put_cmd()
  ...

drivers/infiniband/ulp/srpt/ib_srpt.c

@@ -1269,7 +1269,6 @@ static struct srpt_send_ioctx *srpt_get_send_ioctx(struct srpt_rdma_ch *ch)
 		return ioctx;
 
 	BUG_ON(ioctx->ch != ch);
-	kref_init(&ioctx->kref);
 	spin_lock_init(&ioctx->spinlock);
 	ioctx->state = SRPT_STATE_NEW;
 	ioctx->n_rbuf = 0;
@@ -1290,39 +1289,6 @@ static struct srpt_send_ioctx *srpt_get_send_ioctx(struct srpt_rdma_ch *ch)
 	return ioctx;
 }
 
-/**
- * srpt_put_send_ioctx() - Free up resources.
- */
-static void srpt_put_send_ioctx(struct srpt_send_ioctx *ioctx)
-{
-	struct srpt_rdma_ch *ch;
-	unsigned long flags;
-
-	BUG_ON(!ioctx);
-	ch = ioctx->ch;
-	BUG_ON(!ch);
-
-	WARN_ON(srpt_get_cmd_state(ioctx) != SRPT_STATE_DONE);
-
-	srpt_unmap_sg_to_ib_sge(ioctx->ch, ioctx);
-	transport_generic_free_cmd(&ioctx->cmd, 0);
-
-	if (ioctx->n_rbuf > 1) {
-		kfree(ioctx->rbufs);
-		ioctx->rbufs = NULL;
-		ioctx->n_rbuf = 0;
-	}
-
-	spin_lock_irqsave(&ch->spinlock, flags);
-	list_add(&ioctx->free_list, &ch->free_list);
-	spin_unlock_irqrestore(&ch->spinlock, flags);
-}
-
-static void srpt_put_send_ioctx_kref(struct kref *kref)
-{
-	srpt_put_send_ioctx(container_of(kref, struct srpt_send_ioctx, kref));
-}
-
 /**
  * srpt_abort_cmd() - Abort a SCSI command.
  * @ioctx:   I/O context associated with the SCSI command.
@@ -1359,8 +1325,14 @@ static int srpt_abort_cmd(struct srpt_send_ioctx *ioctx)
 	}
 	spin_unlock_irqrestore(&ioctx->spinlock, flags);
 
-	if (state == SRPT_STATE_DONE)
+	if (state == SRPT_STATE_DONE) {
+		struct srpt_rdma_ch *ch = ioctx->ch;
+
+		BUG_ON(ch->sess == NULL);
+
+		target_put_sess_cmd(ch->sess, &ioctx->cmd);
 		goto out;
+	}
 
 	pr_debug("Aborting cmd with state %d and tag %lld\n", state,
 		 ioctx->tag);
@@ -1395,11 +1367,11 @@ static int srpt_abort_cmd(struct srpt_send_ioctx *ioctx)
 		spin_lock_irqsave(&ioctx->cmd.t_state_lock, flags);
 		ioctx->cmd.transport_state |= CMD_T_LUN_STOP;
 		spin_unlock_irqrestore(&ioctx->cmd.t_state_lock, flags);
-		kref_put(&ioctx->kref, srpt_put_send_ioctx_kref);
+		target_put_sess_cmd(ioctx->ch->sess, &ioctx->cmd);
 		break;
 	case SRPT_STATE_MGMT_RSP_SENT:
 		srpt_set_cmd_state(ioctx, SRPT_STATE_DONE);
-		kref_put(&ioctx->kref, srpt_put_send_ioctx_kref);
+		target_put_sess_cmd(ioctx->ch->sess, &ioctx->cmd);
 		break;
 	default:
 		WARN_ON("ERROR: unexpected command state");
@@ -1457,11 +1429,13 @@ static void srpt_handle_send_comp(struct srpt_rdma_ch *ch,
 		    && state != SRPT_STATE_DONE))
 		pr_debug("state = %d\n", state);
 
-	if (state != SRPT_STATE_DONE)
-		kref_put(&ioctx->kref, srpt_put_send_ioctx_kref);
-	else
+	if (state != SRPT_STATE_DONE) {
+		srpt_unmap_sg_to_ib_sge(ch, ioctx);
+		transport_generic_free_cmd(&ioctx->cmd, 0);
+	} else {
 		printk(KERN_ERR "IB completion has been received too late for"
 		       " wr_id = %u.\n", ioctx->ioctx.index);
+	}
 }
 
 /**
@@ -1712,10 +1686,10 @@ out_err:
 
 static int srpt_check_stop_free(struct se_cmd *cmd)
 {
-	struct srpt_send_ioctx *ioctx;
+	struct srpt_send_ioctx *ioctx = container_of(cmd,
+				struct srpt_send_ioctx, cmd);
 
-	ioctx = container_of(cmd, struct srpt_send_ioctx, cmd);
-	return kref_put(&ioctx->kref, srpt_put_send_ioctx_kref);
+	return target_put_sess_cmd(ioctx->ch->sess, &ioctx->cmd);
 }
 
 /**
@@ -1730,12 +1704,12 @@ static int srpt_handle_cmd(struct srpt_rdma_ch *ch,
 	uint64_t unpacked_lun;
 	u64 data_len;
 	enum dma_data_direction dir;
-	int ret;
+	sense_reason_t ret;
+	int rc;
 
 	BUG_ON(!send_ioctx);
 
 	srp_cmd = recv_ioctx->ioctx.buf;
-	kref_get(&send_ioctx->kref);
 	cmd = &send_ioctx->cmd;
 	send_ioctx->tag = srp_cmd->tag;
 
@@ -1755,40 +1729,26 @@ static int srpt_handle_cmd(struct srpt_rdma_ch *ch,
 		break;
 	}
 
-	ret = srpt_get_desc_tbl(send_ioctx, srp_cmd, &dir, &data_len);
-	if (ret) {
+	if (srpt_get_desc_tbl(send_ioctx, srp_cmd, &dir, &data_len)) {
 		printk(KERN_ERR "0x%llx: parsing SRP descriptor table failed.\n",
 		       srp_cmd->tag);
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		kref_put(&send_ioctx->kref, srpt_put_send_ioctx_kref);
+		ret = TCM_INVALID_CDB_FIELD;
 		goto send_sense;
 	}
 
-	cmd->data_length = data_len;
-	cmd->data_direction = dir;
 	unpacked_lun = srpt_unpack_lun((uint8_t *)&srp_cmd->lun,
 				       sizeof(srp_cmd->lun));
-	if (transport_lookup_cmd_lun(cmd, unpacked_lun) < 0) {
-		kref_put(&send_ioctx->kref, srpt_put_send_ioctx_kref);
+	rc = target_submit_cmd(cmd, ch->sess, srp_cmd->cdb,
+			&send_ioctx->sense_data[0], unpacked_lun, data_len,
+			MSG_SIMPLE_TAG, dir, TARGET_SCF_ACK_KREF);
+	if (rc != 0) {
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 		goto send_sense;
 	}
-	ret = target_setup_cmd_from_cdb(cmd, srp_cmd->cdb);
-	if (ret < 0) {
-		kref_put(&send_ioctx->kref, srpt_put_send_ioctx_kref);
-		if (cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT) {
-			srpt_queue_status(cmd);
-			return 0;
-		} else
-			goto send_sense;
-	}
-
-	transport_handle_cdb_direct(cmd);
 	return 0;
 
 send_sense:
-	transport_send_check_condition_and_sense(cmd, cmd->scsi_sense_reason,
-						 0);
+	transport_send_check_condition_and_sense(cmd, ret, 0);
 	return -1;
 }
 
@@ -1865,9 +1825,11 @@ static void srpt_handle_tsk_mgmt(struct srpt_rdma_ch *ch,
 {
 	struct srp_tsk_mgmt *srp_tsk;
 	struct se_cmd *cmd;
+	struct se_session *sess = ch->sess;
 	uint64_t unpacked_lun;
+	uint32_t tag = 0;
 	int tcm_tmr;
-	int res;
+	int rc;
 
 	BUG_ON(!send_ioctx);
 
@@ -1882,39 +1844,32 @@ static void srpt_handle_tsk_mgmt(struct srpt_rdma_ch *ch,
 	send_ioctx->tag = srp_tsk->tag;
 	tcm_tmr = srp_tmr_to_tcm(srp_tsk->tsk_mgmt_func);
 	if (tcm_tmr < 0) {
-		send_ioctx->cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 		send_ioctx->cmd.se_tmr_req->response =
 			TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
-		goto process_tmr;
-	}
-	res = core_tmr_alloc_req(cmd, NULL, tcm_tmr, GFP_KERNEL);
-	if (res < 0) {
-		send_ioctx->cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		send_ioctx->cmd.se_tmr_req->response = TMR_FUNCTION_REJECTED;
-		goto process_tmr;
+		goto fail;
 	}
-
 	unpacked_lun = srpt_unpack_lun((uint8_t *)&srp_tsk->lun,
 				       sizeof(srp_tsk->lun));
-	res = transport_lookup_tmr_lun(&send_ioctx->cmd, unpacked_lun);
-	if (res) {
-		pr_debug("rejecting TMR for LUN %lld\n", unpacked_lun);
-		send_ioctx->cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		send_ioctx->cmd.se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
-		goto process_tmr;
-	}
-
-	if (srp_tsk->tsk_mgmt_func == SRP_TSK_ABORT_TASK)
-		srpt_rx_mgmt_fn_tag(send_ioctx, srp_tsk->task_tag);
-
-process_tmr:
-	kref_get(&send_ioctx->kref);
-	if (!(send_ioctx->cmd.se_cmd_flags & SCF_SCSI_CDB_EXCEPTION))
-		transport_generic_handle_tmr(&send_ioctx->cmd);
-	else
-		transport_send_check_condition_and_sense(cmd,
-						cmd->scsi_sense_reason, 0);
 
+	if (srp_tsk->tsk_mgmt_func == SRP_TSK_ABORT_TASK) {
+		rc = srpt_rx_mgmt_fn_tag(send_ioctx, srp_tsk->task_tag);
+		if (rc < 0) {
+			send_ioctx->cmd.se_tmr_req->response =
+					TMR_TASK_DOES_NOT_EXIST;
+			goto fail;
+		}
+		tag = srp_tsk->task_tag;
+	}
+	rc = target_submit_tmr(&send_ioctx->cmd, sess, NULL, unpacked_lun,
+				srp_tsk, tcm_tmr, GFP_KERNEL, tag,
+				TARGET_SCF_ACK_KREF);
+	if (rc != 0) {
+		send_ioctx->cmd.se_tmr_req->response = TMR_FUNCTION_REJECTED;
+		goto fail;
+	}
+	return;
+fail:
+	transport_send_check_condition_and_sense(cmd, 0, 0); // XXX:
 }
 
 /**
@@ -1956,10 +1911,6 @@ static void srpt_handle_new_iu(struct srpt_rdma_ch *ch,
 		}
 	}
 
-	transport_init_se_cmd(&send_ioctx->cmd, &srpt_target->tf_ops, ch->sess,
-			      0, DMA_NONE, MSG_SIMPLE_TAG,
-			      send_ioctx->sense_data);
-
 	switch (srp_cmd->opcode) {
 	case SRP_CMD:
 		srpt_handle_cmd(ch, recv_ioctx, send_ioctx);
@@ -2365,6 +2316,7 @@ static void srpt_release_channel_work(struct work_struct *w)
 {
 	struct srpt_rdma_ch *ch;
 	struct srpt_device *sdev;
+	struct se_session *se_sess;
 
 	ch = container_of(w, struct srpt_rdma_ch, release_work);
 	pr_debug("ch = %p; ch->sess = %p; release_done = %p\n", ch, ch->sess,
@@ -2373,8 +2325,13 @@ static void srpt_release_channel_work(struct work_struct *w)
 	sdev = ch->sport->sdev;
 	BUG_ON(!sdev);
 
-	transport_deregister_session_configfs(ch->sess);
-	transport_deregister_session(ch->sess);
+	se_sess = ch->sess;
+	BUG_ON(!se_sess);
+
+	target_wait_for_sess_cmds(se_sess, 0);
+
+	transport_deregister_session_configfs(se_sess);
+	transport_deregister_session(se_sess);
 	ch->sess = NULL;
 
 	srpt_destroy_ch_ib(ch);
@@ -3099,7 +3056,7 @@ static int srpt_queue_response(struct se_cmd *cmd)
 		       ioctx->tag);
 		srpt_unmap_sg_to_ib_sge(ch, ioctx);
 		srpt_set_cmd_state(ioctx, SRPT_STATE_DONE);
-		kref_put(&ioctx->kref, srpt_put_send_ioctx_kref);
+		target_put_sess_cmd(ioctx->ch->sess, &ioctx->cmd);
 	}
 
 out:
@@ -3490,6 +3447,23 @@ static u32 srpt_tpg_get_inst_index(struct se_portal_group *se_tpg)
 
 static void srpt_release_cmd(struct se_cmd *se_cmd)
 {
+	struct srpt_send_ioctx *ioctx = container_of(se_cmd,
+				struct srpt_send_ioctx, cmd);
+	struct srpt_rdma_ch *ch = ioctx->ch;
+	unsigned long flags;
+
+	WARN_ON(ioctx->state != SRPT_STATE_DONE);
+	WARN_ON(ioctx->mapped_sg_count != 0);
+
+	if (ioctx->n_rbuf > 1) {
+		kfree(ioctx->rbufs);
+		ioctx->rbufs = NULL;
+		ioctx->n_rbuf = 0;
+	}
+
+	spin_lock_irqsave(&ch->spinlock, flags);
+	list_add(&ioctx->free_list, &ch->free_list);
+	spin_unlock_irqrestore(&ch->spinlock, flags);
 }
 
 /**

drivers/infiniband/ulp/srpt/ib_srpt.h

@@ -228,7 +228,6 @@ struct srpt_recv_ioctx {
 struct srpt_send_ioctx {
 	struct srpt_ioctx	ioctx;
 	struct srpt_rdma_ch	*ch;
-	struct kref		 kref;
 	struct rdma_iu		*rdma_ius;
 	struct srp_direct_buf	*rbufs;
 	struct srp_direct_buf	single_rbuf;

drivers/scsi/qla2xxx/qla_target.c

@@ -1264,8 +1264,27 @@ static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
 	struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
 {
 	struct qla_hw_data *ha = vha->hw;
+	struct se_session *se_sess = sess->se_sess;
 	struct qla_tgt_mgmt_cmd *mcmd;
+	struct se_cmd *se_cmd;
+	u32 lun = 0;
 	int rc;
+	bool found_lun = false;
+
+	spin_lock(&se_sess->sess_cmd_lock);
+	list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
+		struct qla_tgt_cmd *cmd =
+			container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
+		if (cmd->tag == abts->exchange_addr_to_abort) {
+			lun = cmd->unpacked_lun;
+			found_lun = true;
+			break;
+		}
+	}
+	spin_unlock(&se_sess->sess_cmd_lock);
+
+	if (!found_lun)
+		return -ENOENT;
 
 	ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
 	    "qla_target(%d): task abort (tag=%d)\n",
@@ -1283,7 +1302,7 @@ static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
 	mcmd->sess = sess;
 	memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
 
-	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK,
+	rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
 	    abts->exchange_addr_to_abort);
 	if (rc != 0) {
 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,

drivers/scsi/qla2xxx/tcm_qla2xxx.c

@@ -620,8 +620,8 @@ static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 			return;
 		}
 
-		cmd->se_cmd.scsi_sense_reason = TCM_CHECK_CONDITION_ABORT_CMD;
-		transport_generic_request_failure(&cmd->se_cmd);
+		transport_generic_request_failure(&cmd->se_cmd,
+						  TCM_CHECK_CONDITION_ABORT_CMD);
 		return;
 	}
 

drivers/target/iscsi/iscsi_target.c

@@ -735,7 +735,7 @@ static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn)
 	list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
 		spin_lock(&cmd->istate_lock);
 		if ((cmd->i_state == ISTATE_SENT_STATUS) &&
-		    (cmd->stat_sn < exp_statsn)) {
+		    iscsi_sna_lt(cmd->stat_sn, exp_statsn)) {
 			cmd->i_state = ISTATE_REMOVE;
 			spin_unlock(&cmd->istate_lock);
 			iscsit_add_cmd_to_immediate_queue(cmd, conn,
@@ -767,9 +767,8 @@ static int iscsit_handle_scsi_cmd(
 	struct iscsi_conn *conn,
 	unsigned char *buf)
 {
-	int	data_direction, cmdsn_ret = 0, immed_ret, ret, transport_ret;
-	int	dump_immediate_data = 0, send_check_condition = 0, payload_length;
-	struct iscsi_cmd	*cmd = NULL;
+	int data_direction, payload_length, cmdsn_ret = 0, immed_ret;
+	struct iscsi_cmd *cmd = NULL;
 	struct iscsi_scsi_req *hdr;
 	int iscsi_task_attr;
 	int sam_task_attr;
@@ -956,38 +955,26 @@ done:
 		" ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt,
 		hdr->cmdsn, hdr->data_length, payload_length, conn->cid);
 
-	/*
-	 * The CDB is going to an se_device_t.
-	 */
-	ret = transport_lookup_cmd_lun(&cmd->se_cmd,
-				       scsilun_to_int(&hdr->lun));
-	if (ret < 0) {
-		if (cmd->se_cmd.scsi_sense_reason == TCM_NON_EXISTENT_LUN) {
-			pr_debug("Responding to non-acl'ed,"
-				" non-existent or non-exported iSCSI LUN:"
-				" 0x%016Lx\n", get_unaligned_le64(&hdr->lun));
+	cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd,
+						     scsilun_to_int(&hdr->lun));
+	if (cmd->sense_reason)
+		goto attach_cmd;
+
+	cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb);
+	if (cmd->sense_reason) {
+		if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) {
+			return iscsit_add_reject_from_cmd(
+					ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+					1, 1, buf, cmd);
 		}
-		send_check_condition = 1;
+
 		goto attach_cmd;
 	}
 
-	transport_ret = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb);
-	if (transport_ret == -ENOMEM) {
+	if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) {
 		return iscsit_add_reject_from_cmd(
-				ISCSI_REASON_BOOKMARK_NO_RESOURCES,
-				1, 1, buf, cmd);
-	} else if (transport_ret < 0) {
-		/*
-		 * Unsupported SAM Opcode.  CHECK_CONDITION will be sent
-		 * in iscsit_execute_cmd() during the CmdSN OOO Execution
-		 * Mechinism.
-		 */
-		send_check_condition = 1;
-	} else {
-		if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0)
-			return iscsit_add_reject_from_cmd(
-				ISCSI_REASON_BOOKMARK_NO_RESOURCES,
-				1, 1, buf, cmd);
+			ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+			1, 1, buf, cmd);
 	}
 
 attach_cmd:
@@ -1000,11 +987,12 @@ attach_cmd:
 	 */
 	core_alua_check_nonop_delay(&cmd->se_cmd);
 
-	ret = iscsit_allocate_iovecs(cmd);
-	if (ret < 0)
+	if (iscsit_allocate_iovecs(cmd) < 0) {
 		return iscsit_add_reject_from_cmd(
 				ISCSI_REASON_BOOKMARK_NO_RESOURCES,
 				1, 0, buf, cmd);
+	}
+
 	/*
 	 * Check the CmdSN against ExpCmdSN/MaxCmdSN here if
 	 * the Immediate Bit is not set, and no Immediate
@@ -1031,10 +1019,7 @@ attach_cmd:
 	 * If no Immediate Data is attached, it's OK to return now.
 	 */
 	if (!cmd->immediate_data) {
-		if (send_check_condition)
-			return 0;
-
-		if (cmd->unsolicited_data) {
+		if (!cmd->sense_reason && cmd->unsolicited_data) {
 			iscsit_set_dataout_sequence_values(cmd);
 
 			spin_lock_bh(&cmd->dataout_timeout_lock);
@@ -1050,19 +1035,17 @@ attach_cmd:
 	 * thread.  They are processed in CmdSN order by
 	 * iscsit_check_received_cmdsn() below.
 	 */
-	if (send_check_condition) {
+	if (cmd->sense_reason) {
 		immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
-		dump_immediate_data = 1;
 		goto after_immediate_data;
 	}
 	/*
 	 * Call directly into transport_generic_new_cmd() to perform
 	 * the backend memory allocation.
 	 */
-	ret = transport_generic_new_cmd(&cmd->se_cmd);
-	if (ret < 0) {
+	cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd);
+	if (cmd->sense_reason) {
 		immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
-		dump_immediate_data = 1;
 		goto after_immediate_data;
 	}
 
@@ -1079,7 +1062,7 @@ after_immediate_data:
 		 * Special case for Unsupported SAM WRITE Opcodes
 		 * and ImmediateData=Yes.
 		 */
-		if (dump_immediate_data) {
+		if (cmd->sense_reason) {
 			if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
 				return -1;
 		} else if (cmd->unsolicited_data) {
@@ -1272,8 +1255,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
 		spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 
 		spin_lock_irqsave(&se_cmd->t_state_lock, flags);
-		if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) ||
-		     (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION))
+		if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE))
 			dump_unsolicited_data = 1;
 		spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 
@@ -1742,7 +1724,6 @@ static int iscsit_handle_task_mgt_cmd(
 		ret = transport_lookup_tmr_lun(&cmd->se_cmd,
 					       scsilun_to_int(&hdr->lun));
 		if (ret < 0) {
-			cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			se_tmr->response = ISCSI_TMF_RSP_NO_LUN;
 			goto attach;
 		}
@@ -1751,10 +1732,8 @@ static int iscsit_handle_task_mgt_cmd(
 	switch (function) {
 	case ISCSI_TM_FUNC_ABORT_TASK:
 		se_tmr->response = iscsit_tmr_abort_task(cmd, buf);
-		if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE) {
-			cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+		if (se_tmr->response)
 			goto attach;
-		}
 		break;
 	case ISCSI_TM_FUNC_ABORT_TASK_SET:
 	case ISCSI_TM_FUNC_CLEAR_ACA:
@@ -1763,14 +1742,12 @@ static int iscsit_handle_task_mgt_cmd(
 		break;
 	case ISCSI_TM_FUNC_TARGET_WARM_RESET:
 		if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) {
-			cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED;
 			goto attach;
 		}
 		break;
 	case ISCSI_TM_FUNC_TARGET_COLD_RESET:
 		if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) {
-			cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED;
 			goto attach;
 		}
@@ -1781,7 +1758,7 @@ static int iscsit_handle_task_mgt_cmd(
 		 * Perform sanity checks on the ExpDataSN only if the
 		 * TASK_REASSIGN was successful.
 		 */
-		if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE)
+		if (se_tmr->response)
 			break;
 
 		if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0)
@@ -1792,7 +1769,6 @@ static int iscsit_handle_task_mgt_cmd(
 	default:
 		pr_err("Unknown TMR function: 0x%02x, protocol"
 			" error.\n", function);
-		cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 		se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED;
 		goto attach;
 	}
@@ -2360,7 +2336,7 @@ static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn)
 	if (!conn_p)
 		return;
 
-	cmd = iscsit_allocate_cmd(conn_p, GFP_KERNEL);
+	cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC);
 	if (!cmd) {
 		iscsit_dec_conn_usage_count(conn_p);
 		return;

drivers/target/iscsi/iscsi_target_configfs.c

@@ -754,9 +754,33 @@ static ssize_t lio_target_nacl_store_cmdsn_depth(
 
 TF_NACL_BASE_ATTR(lio_target, cmdsn_depth, S_IRUGO | S_IWUSR);
 
+static ssize_t lio_target_nacl_show_tag(
+	struct se_node_acl *se_nacl,
+	char *page)
+{
+	return snprintf(page, PAGE_SIZE, "%s", se_nacl->acl_tag);
+}
+
+static ssize_t lio_target_nacl_store_tag(
+	struct se_node_acl *se_nacl,
+	const char *page,
+	size_t count)
+{
+	int ret;
+
+	ret = core_tpg_set_initiator_node_tag(se_nacl->se_tpg, se_nacl, page);
+
+	if (ret < 0)
+		return ret;
+	return count;
+}
+
+TF_NACL_BASE_ATTR(lio_target, tag, S_IRUGO | S_IWUSR);
+
 static struct configfs_attribute *lio_target_initiator_attrs[] = {
 	&lio_target_nacl_info.attr,
 	&lio_target_nacl_cmdsn_depth.attr,
+	&lio_target_nacl_tag.attr,
 	NULL,
 };
 
@@ -803,7 +827,7 @@ static struct se_node_acl *lio_target_make_nodeacl(
 	acl = container_of(se_nacl, struct iscsi_node_acl, se_node_acl);
 	stats_cg = &se_nacl->acl_fabric_stat_group;
 
-	stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	stats_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 				GFP_KERNEL);
 	if (!stats_cg->default_groups) {
 		pr_err("Unable to allocate memory for"
@@ -1268,7 +1292,7 @@ static struct se_wwn *lio_target_call_coreaddtiqn(
 	 */
 	stats_cg = &tiqn->tiqn_wwn.fabric_stat_group;
 
-	stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
+	stats_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
 				GFP_KERNEL);
 	if (!stats_cg->default_groups) {
 		pr_err("Unable to allocate memory for"

drivers/target/iscsi/iscsi_target_core.h

@@ -474,7 +474,7 @@ struct iscsi_cmd {
 	struct scatterlist	*first_data_sg;
 	u32			first_data_sg_off;
 	u32			kmapped_nents;
-
+	sense_reason_t		sense_reason;
 }  ____cacheline_aligned;
 
 struct iscsi_tmr_req {

drivers/target/iscsi/iscsi_target_erl1.c

@@ -929,11 +929,10 @@ int iscsit_execute_cmd(struct iscsi_cmd *cmd, int ooo)
 	case ISCSI_OP_SCSI_CMD:
 		/*
 		 * Go ahead and send the CHECK_CONDITION status for
-		 * any SCSI CDB exceptions that may have occurred, also
-		 * handle the SCF_SCSI_RESERVATION_CONFLICT case here as well.
+		 * any SCSI CDB exceptions that may have occurred.
 		 */
-		if (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION) {
-			if (se_cmd->scsi_sense_reason == TCM_RESERVATION_CONFLICT) {
+		if (cmd->sense_reason) {
+			if (cmd->sense_reason == TCM_RESERVATION_CONFLICT) {
 				cmd->i_state = ISTATE_SEND_STATUS;
 				spin_unlock_bh(&cmd->istate_lock);
 				iscsit_add_cmd_to_response_queue(cmd, cmd->conn,
@@ -956,7 +955,7 @@ int iscsit_execute_cmd(struct iscsi_cmd *cmd, int ooo)
 			 * exception
 			 */
 			return transport_send_check_condition_and_sense(se_cmd,
-					se_cmd->scsi_sense_reason, 0);
+					cmd->sense_reason, 0);
 		}
 		/*
 		 * Special case for delayed CmdSN with Immediate
@@ -1013,7 +1012,7 @@ int iscsit_execute_cmd(struct iscsi_cmd *cmd, int ooo)
 		iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
 		break;
 	case ISCSI_OP_SCSI_TMFUNC:
-		if (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION) {
+		if (cmd->se_cmd.se_tmr_req->response) {
 			spin_unlock_bh(&cmd->istate_lock);
 			iscsit_add_cmd_to_response_queue(cmd, cmd->conn,
 					cmd->i_state);

drivers/target/iscsi/iscsi_target_erl2.c

@@ -372,7 +372,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
 		 * made generic here.
 		 */
 		if (!(cmd->cmd_flags & ICF_OOO_CMDSN) && !cmd->immediate_cmd &&
-		     (cmd->cmd_sn >= conn->sess->exp_cmd_sn)) {
+		     iscsi_sna_gte(cmd->stat_sn, conn->sess->exp_cmd_sn)) {
 			list_del(&cmd->i_conn_node);
 			spin_unlock_bh(&conn->cmd_lock);
 			iscsit_free_cmd(cmd);

drivers/target/iscsi/iscsi_target_login.c

@@ -127,13 +127,13 @@ int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
 
 	initiatorname_param = iscsi_find_param_from_key(
 			INITIATORNAME, conn->param_list);
-	if (!initiatorname_param)
-		return -1;
-
 	sessiontype_param = iscsi_find_param_from_key(
 			SESSIONTYPE, conn->param_list);
-	if (!sessiontype_param)
+	if (!initiatorname_param || !sessiontype_param) {
+		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+			ISCSI_LOGIN_STATUS_MISSING_FIELDS);
 		return -1;
+	}
 
 	sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
 
@@ -254,9 +254,9 @@ static int iscsi_login_zero_tsih_s1(
 		kfree(sess);
 		return -ENOMEM;
 	}
-	spin_lock(&sess_idr_lock);
+	spin_lock_bh(&sess_idr_lock);
 	ret = idr_get_new(&sess_idr, NULL, &sess->session_index);
-	spin_unlock(&sess_idr_lock);
+	spin_unlock_bh(&sess_idr_lock);
 
 	if (ret < 0) {
 		pr_err("idr_get_new() for sess_idr failed\n");
@@ -1118,10 +1118,8 @@ new_sess_out:
 		idr_remove(&sess_idr, conn->sess->session_index);
 		spin_unlock_bh(&sess_idr_lock);
 	}
-	if (conn->sess->sess_ops)
-		kfree(conn->sess->sess_ops);
-	if (conn->sess)
-		kfree(conn->sess);
+	kfree(conn->sess->sess_ops);
+	kfree(conn->sess);
 old_sess_out:
 	iscsi_stop_login_thread_timer(np);
 	/*

drivers/target/iscsi/iscsi_target_nego.c

@@ -620,8 +620,11 @@ static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_log
 			login->req_buf,
 			payload_length,
 			conn);
-	if (ret < 0)
+	if (ret < 0) {
+		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+				ISCSI_LOGIN_STATUS_INIT_ERR);
 		return -1;
+	}
 
 	if (login->first_request)
 		if (iscsi_target_check_first_request(conn, login) < 0)
@@ -636,8 +639,11 @@ static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_log
 			login->rsp_buf,
 			&login->rsp_length,
 			conn->param_list);
-	if (ret < 0)
+	if (ret < 0) {
+		iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
+				ISCSI_LOGIN_STATUS_INIT_ERR);
 		return -1;
+	}
 
 	if (!login->auth_complete &&
 	     ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication) {

drivers/target/iscsi/iscsi_target_parameters.c

@@ -154,22 +154,18 @@ static struct iscsi_param *iscsi_set_default_param(struct iscsi_param_list *para
 	}
 	INIT_LIST_HEAD(&param->p_list);
 
-	param->name = kzalloc(strlen(name) + 1, GFP_KERNEL);
+	param->name = kstrdup(name, GFP_KERNEL);
 	if (!param->name) {
 		pr_err("Unable to allocate memory for parameter name.\n");
 		goto out;
 	}
 
-	param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
+	param->value = kstrdup(value, GFP_KERNEL);
 	if (!param->value) {
 		pr_err("Unable to allocate memory for parameter value.\n");
 		goto out;
 	}
 
-	memcpy(param->name, name, strlen(name));
-	param->name[strlen(name)] = '\0';
-	memcpy(param->value, value, strlen(value));
-	param->value[strlen(value)] = '\0';
 	param->phase		= phase;
 	param->scope		= scope;
 	param->sender		= sender;
@@ -635,11 +631,8 @@ void iscsi_release_param_list(struct iscsi_param_list *param_list)
 		list_del(&param->p_list);
 
 		kfree(param->name);
-		param->name = NULL;
 		kfree(param->value);
-		param->value = NULL;
 		kfree(param);
-		param = NULL;
 	}
 
 	iscsi_release_extra_responses(param_list);
@@ -687,15 +680,12 @@ int iscsi_update_param_value(struct iscsi_param *param, char *value)
 {
 	kfree(param->value);
 
-	param->value = kzalloc(strlen(value) + 1, GFP_KERNEL);
+	param->value = kstrdup(value, GFP_KERNEL);
 	if (!param->value) {
 		pr_err("Unable to allocate memory for value.\n");
 		return -ENOMEM;
 	}
 
-	memcpy(param->value, value, strlen(value));
-	param->value[strlen(value)] = '\0';
-
 	pr_debug("iSCSI Parameter updated to %s=%s\n",
 			param->name, param->value);
 	return 0;

drivers/target/iscsi/iscsi_target_tmr.c

@@ -50,8 +50,8 @@ u8 iscsit_tmr_abort_task(
 	if (!ref_cmd) {
 		pr_err("Unable to locate RefTaskTag: 0x%08x on CID:"
 			" %hu.\n", hdr->rtt, conn->cid);
-		return (be32_to_cpu(hdr->refcmdsn) >= conn->sess->exp_cmd_sn &&
-			be32_to_cpu(hdr->refcmdsn) <= conn->sess->max_cmd_sn) ?
+		return (iscsi_sna_gte(be32_to_cpu(hdr->refcmdsn), conn->sess->exp_cmd_sn) &&
+			iscsi_sna_lte(be32_to_cpu(hdr->refcmdsn), conn->sess->max_cmd_sn)) ?
 			ISCSI_TMF_RSP_COMPLETE : ISCSI_TMF_RSP_NO_TASK;
 	}
 	if (ref_cmd->cmd_sn != be32_to_cpu(hdr->refcmdsn)) {

drivers/target/iscsi/iscsi_target_tq.c

@@ -66,8 +66,7 @@ static struct iscsi_thread_set *iscsi_get_ts_from_inactive_list(void)
 		return NULL;
 	}
 
-	list_for_each_entry(ts, &inactive_ts_list, ts_list)
-		break;
+	ts = list_first_entry(&inactive_ts_list, struct iscsi_thread_set, ts_list);
 
 	list_del(&ts->ts_list);
 	iscsit_global->inactive_ts--;

drivers/target/iscsi/iscsi_target_util.c

@@ -500,8 +500,8 @@ struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *c
 		spin_unlock_bh(&conn->immed_queue_lock);
 		return NULL;
 	}
-	list_for_each_entry(qr, &conn->immed_queue_list, qr_list)
-		break;
+	qr = list_first_entry(&conn->immed_queue_list,
+			      struct iscsi_queue_req, qr_list);
 
 	list_del(&qr->qr_list);
 	if (qr->cmd)
@@ -575,8 +575,8 @@ struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *co
 		return NULL;
 	}
 
-	list_for_each_entry(qr, &conn->response_queue_list, qr_list)
-		break;
+	qr = list_first_entry(&conn->response_queue_list,
+			      struct iscsi_queue_req, qr_list);
 
 	list_del(&qr->qr_list);
 	if (qr->cmd)

drivers/target/loopback/tcm_loop.h

@@ -53,7 +53,6 @@ struct tcm_loop_hba {
 	struct se_hba_s *se_hba;
 	struct se_lun *tl_hba_lun;
 	struct se_port *tl_hba_lun_sep;
-	struct se_device_s *se_dev_hba_ptr;
 	struct tcm_loop_nexus *tl_nexus;
 	struct device dev;
 	struct Scsi_Host *sh;

drivers/target/sbp/Kconfig

@@ -1,6 +1,6 @@
 config SBP_TARGET
 	tristate "FireWire SBP-2 fabric module"
-	depends on FIREWIRE && EXPERIMENTAL
+	depends on FIREWIRE
 	help
 	  Say Y or M here to enable SCSI target functionality over FireWire.
 	  This enables you to expose SCSI devices to other nodes on the FireWire

drivers/target/sbp/sbp_target.c

@@ -704,16 +704,17 @@ static void session_maintenance_work(struct work_struct *work)
 static int tgt_agent_rw_agent_state(struct fw_card *card, int tcode, void *data,
 		struct sbp_target_agent *agent)
 {
-	__be32 state;
+	int state;
 
 	switch (tcode) {
 	case TCODE_READ_QUADLET_REQUEST:
 		pr_debug("tgt_agent AGENT_STATE READ\n");
 
 		spin_lock_bh(&agent->lock);
-		state = cpu_to_be32(agent->state);
+		state = agent->state;
 		spin_unlock_bh(&agent->lock);
-		memcpy(data, &state, sizeof(state));
+
+		*(__be32 *)data = cpu_to_be32(state);
 
 		return RCODE_COMPLETE;
 
@@ -2207,20 +2208,23 @@ static struct se_portal_group *sbp_make_tpg(
 	tport->mgt_agt = sbp_management_agent_register(tport);
 	if (IS_ERR(tport->mgt_agt)) {
 		ret = PTR_ERR(tport->mgt_agt);
-		kfree(tpg);
-		return ERR_PTR(ret);
+		goto out_free_tpg;
 	}
 
 	ret = core_tpg_register(&sbp_fabric_configfs->tf_ops, wwn,
 			&tpg->se_tpg, (void *)tpg,
 			TRANSPORT_TPG_TYPE_NORMAL);
-	if (ret < 0) {
-		sbp_management_agent_unregister(tport->mgt_agt);
-		kfree(tpg);
-		return ERR_PTR(ret);
-	}
+	if (ret < 0)
+		goto out_unreg_mgt_agt;
 
 	return &tpg->se_tpg;
+
+out_unreg_mgt_agt:
+	sbp_management_agent_unregister(tport->mgt_agt);
+out_free_tpg:
+	tport->tpg = NULL;
+	kfree(tpg);
+	return ERR_PTR(ret);
 }
 
 static void sbp_drop_tpg(struct se_portal_group *se_tpg)

drivers/target/target_core_alua.c

@@ -3,8 +3,7 @@
  *
  * This file contains SPC-3 compliant asymmetric logical unit assigntment (ALUA)
  *
- * Copyright (c) 2009-2010 Rising Tide Systems
- * Copyright (c) 2009-2010 Linux-iSCSI.org
+ * (c) Copyright 2009-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -41,7 +40,7 @@
 #include "target_core_alua.h"
 #include "target_core_ua.h"
 
-static int core_alua_check_transition(int state, int *primary);
+static sense_reason_t core_alua_check_transition(int state, int *primary);
 static int core_alua_set_tg_pt_secondary_state(
 		struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem,
 		struct se_port *port, int explict, int offline);
@@ -59,15 +58,17 @@ struct t10_alua_lu_gp *default_lu_gp;
  *
  * See spc4r17 section 6.27
  */
-int target_emulate_report_target_port_groups(struct se_cmd *cmd)
+sense_reason_t
+target_emulate_report_target_port_groups(struct se_cmd *cmd)
 {
-	struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct se_port *port;
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
 	unsigned char *buf;
 	u32 rd_len = 0, off;
 	int ext_hdr = (cmd->t_task_cdb[1] & 0x20);
+
 	/*
 	 * Skip over RESERVED area to first Target port group descriptor
 	 * depending on the PARAMETER DATA FORMAT type..
@@ -81,13 +82,14 @@ int target_emulate_report_target_port_groups(struct se_cmd *cmd)
 		pr_warn("REPORT TARGET PORT GROUPS allocation length %u too"
 			" small for %s header\n", cmd->data_length,
 			(ext_hdr) ? "extended" : "normal");
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
-	spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
-	list_for_each_entry(tg_pt_gp, &su_dev->t10_alua.tg_pt_gps_list,
+	spin_lock(&dev->t10_alua.tg_pt_gps_lock);
+	list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list,
 			tg_pt_gp_list) {
 		/*
 		 * Check if the Target port group and Target port descriptor list
@@ -160,7 +162,7 @@ int target_emulate_report_target_port_groups(struct se_cmd *cmd)
 		}
 		spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
 	}
-	spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 	/*
 	 * Set the RETURN DATA LENGTH set in the header of the DataIN Payload
 	 */
@@ -200,32 +202,33 @@ int target_emulate_report_target_port_groups(struct se_cmd *cmd)
  *
  * See spc4r17 section 6.35
  */
-int target_emulate_set_target_port_groups(struct se_cmd *cmd)
+sense_reason_t
+target_emulate_set_target_port_groups(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct se_port *port, *l_port = cmd->se_lun->lun_sep;
 	struct se_node_acl *nacl = cmd->se_sess->se_node_acl;
 	struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem;
 	unsigned char *buf;
 	unsigned char *ptr;
+	sense_reason_t rc;
 	u32 len = 4; /* Skip over RESERVED area in header */
-	int alua_access_state, primary = 0, rc;
+	int alua_access_state, primary = 0;
 	u16 tg_pt_id, rtpi;
 
-	if (!l_port) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
-	}
+	if (!l_port)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
 	if (cmd->data_length < 4) {
 		pr_warn("SET TARGET PORT GROUPS parameter list length %u too"
 			" small\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
 	/*
 	 * Determine if explict ALUA via SET_TARGET_PORT_GROUPS is allowed
@@ -234,8 +237,7 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 	l_tg_pt_gp_mem = l_port->sep_alua_tg_pt_gp_mem;
 	if (!l_tg_pt_gp_mem) {
 		pr_err("Unable to access l_port->sep_alua_tg_pt_gp_mem\n");
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-		rc = -EINVAL;
+		rc = TCM_UNSUPPORTED_SCSI_OPCODE;
 		goto out;
 	}
 	spin_lock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
@@ -243,24 +245,22 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 	if (!l_tg_pt_gp) {
 		spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
 		pr_err("Unable to access *l_tg_pt_gp_mem->tg_pt_gp\n");
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-		rc = -EINVAL;
+		rc = TCM_UNSUPPORTED_SCSI_OPCODE;
 		goto out;
 	}
-	rc = (l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA);
 	spin_unlock(&l_tg_pt_gp_mem->tg_pt_gp_mem_lock);
 
-	if (!rc) {
+	if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICT_ALUA)) {
 		pr_debug("Unable to process SET_TARGET_PORT_GROUPS"
 				" while TPGS_EXPLICT_ALUA is disabled\n");
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-		rc = -EINVAL;
+		rc = TCM_UNSUPPORTED_SCSI_OPCODE;
 		goto out;
 	}
 
 	ptr = &buf[4]; /* Skip over RESERVED area in header */
 
 	while (len < cmd->data_length) {
+		bool found = false;
 		alua_access_state = (ptr[0] & 0x0f);
 		/*
 		 * Check the received ALUA access state, and determine if
@@ -268,7 +268,7 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 		 * access state.
 		 */
 		rc = core_alua_check_transition(alua_access_state, &primary);
-		if (rc != 0) {
+		if (rc) {
 			/*
 			 * If the SET TARGET PORT GROUPS attempts to establish
 			 * an invalid combination of target port asymmetric
@@ -279,11 +279,9 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 			 * REQUEST, and the additional sense code set to INVALID
 			 * FIELD IN PARAMETER LIST.
 			 */
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			rc = -EINVAL;
 			goto out;
 		}
-		rc = -1;
+
 		/*
 		 * If the ASYMMETRIC ACCESS STATE field (see table 267)
 		 * specifies a primary target port asymmetric access state,
@@ -303,9 +301,9 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 			 * Locate the matching target port group ID from
 			 * the global tg_pt_gp list
 			 */
-			spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+			spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 			list_for_each_entry(tg_pt_gp,
-					&su_dev->t10_alua.tg_pt_gps_list,
+					&dev->t10_alua.tg_pt_gps_list,
 					tg_pt_gp_list) {
 				if (!tg_pt_gp->tg_pt_gp_valid_id)
 					continue;
@@ -315,27 +313,20 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 
 				atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
 				smp_mb__after_atomic_inc();
-				spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
 
-				rc = core_alua_do_port_transition(tg_pt_gp,
+				spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
+
+				if (!core_alua_do_port_transition(tg_pt_gp,
 						dev, l_port, nacl,
-						alua_access_state, 1);
+						alua_access_state, 1))
+					found = true;
 
-				spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+				spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 				atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
 				smp_mb__after_atomic_dec();
 				break;
 			}
-			spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
-			/*
-			 * If not matching target port group ID can be located
-			 * throw an exception with ASCQ: INVALID_PARAMETER_LIST
-			 */
-			if (rc != 0) {
-				cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-				rc = -EINVAL;
-				goto out;
-			}
+			spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 		} else {
 			/*
 			 * Extact the RELATIVE TARGET PORT IDENTIFIER to identify
@@ -354,25 +345,22 @@ int target_emulate_set_target_port_groups(struct se_cmd *cmd)
 					continue;
 
 				tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+
 				spin_unlock(&dev->se_port_lock);
 
-				rc = core_alua_set_tg_pt_secondary_state(
-						tg_pt_gp_mem, port, 1, 1);
+				if (!core_alua_set_tg_pt_secondary_state(
+						tg_pt_gp_mem, port, 1, 1))
+					found = true;
 
 				spin_lock(&dev->se_port_lock);
 				break;
 			}
 			spin_unlock(&dev->se_port_lock);
-			/*
-			 * If not matching relative target port identifier can
-			 * be located, throw an exception with ASCQ:
-			 * INVALID_PARAMETER_LIST
-			 */
-			if (rc != 0) {
-				cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-				rc = -EINVAL;
-				goto out;
-			}
+		}
+
+		if (!found) {
+			rc = TCM_INVALID_PARAMETER_LIST;
+			goto out;
 		}
 
 		ptr += 4;
@@ -523,40 +511,27 @@ static inline int core_alua_state_transition(
 }
 
 /*
- * Used for alua_type SPC_ALUA_PASSTHROUGH and SPC2_ALUA_DISABLED
- * in transport_cmd_sequencer().  This function is assigned to
- * struct t10_alua *->state_check() in core_setup_alua()
- */
-static int core_alua_state_check_nop(
-	struct se_cmd *cmd,
-	unsigned char *cdb,
-	u8 *alua_ascq)
-{
-	return 0;
-}
-
-/*
- * Used for alua_type SPC3_ALUA_EMULATED in transport_cmd_sequencer().
- * This function is assigned to struct t10_alua *->state_check() in
- * core_setup_alua()
- *
- * Also, this function can return three different return codes to
- * signal transport_generic_cmd_sequencer()
- *
  * return 1: Is used to signal LUN not accecsable, and check condition/not ready
  * return 0: Used to signal success
  * reutrn -1: Used to signal failure, and invalid cdb field
  */
-static int core_alua_state_check(
-	struct se_cmd *cmd,
-	unsigned char *cdb,
-	u8 *alua_ascq)
+sense_reason_t
+target_alua_state_check(struct se_cmd *cmd)
 {
+	struct se_device *dev = cmd->se_dev;
+	unsigned char *cdb = cmd->t_task_cdb;
 	struct se_lun *lun = cmd->se_lun;
 	struct se_port *port = lun->lun_sep;
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
 	int out_alua_state, nonop_delay_msecs;
+	u8 alua_ascq;
+	int ret;
+
+	if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)
+		return 0;
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+		return 0;
 
 	if (!port)
 		return 0;
@@ -565,11 +540,11 @@ static int core_alua_state_check(
 	 * access state: OFFLINE
 	 */
 	if (atomic_read(&port->sep_tg_pt_secondary_offline)) {
-		*alua_ascq = ASCQ_04H_ALUA_OFFLINE;
 		pr_debug("ALUA: Got secondary offline status for local"
 				" target port\n");
-		*alua_ascq = ASCQ_04H_ALUA_OFFLINE;
-		return 1;
+		alua_ascq = ASCQ_04H_ALUA_OFFLINE;
+		ret = 1;
+		goto out;
 	}
 	 /*
 	 * Second, obtain the struct t10_alua_tg_pt_gp_member pointer to the
@@ -594,14 +569,18 @@ static int core_alua_state_check(
 
 	switch (out_alua_state) {
 	case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
-		return core_alua_state_nonoptimized(cmd, cdb,
-					nonop_delay_msecs, alua_ascq);
+		ret = core_alua_state_nonoptimized(cmd, cdb,
+					nonop_delay_msecs, &alua_ascq);
+		break;
 	case ALUA_ACCESS_STATE_STANDBY:
-		return core_alua_state_standby(cmd, cdb, alua_ascq);
+		ret = core_alua_state_standby(cmd, cdb, &alua_ascq);
+		break;
 	case ALUA_ACCESS_STATE_UNAVAILABLE:
-		return core_alua_state_unavailable(cmd, cdb, alua_ascq);
+		ret = core_alua_state_unavailable(cmd, cdb, &alua_ascq);
+		break;
 	case ALUA_ACCESS_STATE_TRANSITION:
-		return core_alua_state_transition(cmd, cdb, alua_ascq);
+		ret = core_alua_state_transition(cmd, cdb, &alua_ascq);
+		break;
 	/*
 	 * OFFLINE is a secondary ALUA target port group access state, that is
 	 * handled above with struct se_port->sep_tg_pt_secondary_offline=1
@@ -610,7 +589,24 @@ static int core_alua_state_check(
 	default:
 		pr_err("Unknown ALUA access state: 0x%02x\n",
 				out_alua_state);
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
+	}
+
+out:
+	if (ret > 0) {
+		/*
+		 * Set SCSI additional sense code (ASC) to 'LUN Not Accessible';
+		 * The ALUA additional sense code qualifier (ASCQ) is determined
+		 * by the ALUA primary or secondary access state..
+		 */
+		pr_debug("[%s]: ALUA TG Port not available, "
+			"SenseKey: NOT_READY, ASC/ASCQ: "
+			"0x04/0x%02x\n",
+			cmd->se_tfo->get_fabric_name(), alua_ascq);
+
+		cmd->scsi_asc = 0x04;
+		cmd->scsi_ascq = alua_ascq;
+		return TCM_CHECK_CONDITION_NOT_READY;
 	}
 
 	return 0;
@@ -619,7 +615,8 @@ static int core_alua_state_check(
 /*
  * Check implict and explict ALUA state change request.
  */
-static int core_alua_check_transition(int state, int *primary)
+static sense_reason_t
+core_alua_check_transition(int state, int *primary)
 {
 	switch (state) {
 	case ALUA_ACCESS_STATE_ACTIVE_OPTMIZED:
@@ -641,7 +638,7 @@ static int core_alua_check_transition(int state, int *primary)
 		break;
 	default:
 		pr_err("Unknown ALUA access state: 0x%02x\n", state);
-		return -EINVAL;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
 
 	return 0;
@@ -758,8 +755,7 @@ static int core_alua_update_tpg_primary_metadata(
 	int primary_state,
 	unsigned char *md_buf)
 {
-	struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
-	struct t10_wwn *wwn = &su_dev->t10_wwn;
+	struct t10_wwn *wwn = &tg_pt_gp->tg_pt_gp_dev->t10_wwn;
 	char path[ALUA_METADATA_PATH_LEN];
 	int len;
 
@@ -899,7 +895,6 @@ int core_alua_do_port_transition(
 {
 	struct se_device *dev;
 	struct se_port *port;
-	struct se_subsystem_dev *su_dev;
 	struct se_node_acl *nacl;
 	struct t10_alua_lu_gp *lu_gp;
 	struct t10_alua_lu_gp_member *lu_gp_mem, *local_lu_gp_mem;
@@ -949,14 +944,13 @@ int core_alua_do_port_transition(
 				lu_gp_mem_list) {
 
 		dev = lu_gp_mem->lu_gp_mem_dev;
-		su_dev = dev->se_sub_dev;
 		atomic_inc(&lu_gp_mem->lu_gp_mem_ref_cnt);
 		smp_mb__after_atomic_inc();
 		spin_unlock(&lu_gp->lu_gp_lock);
 
-		spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+		spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 		list_for_each_entry(tg_pt_gp,
-				&su_dev->t10_alua.tg_pt_gps_list,
+				&dev->t10_alua.tg_pt_gps_list,
 				tg_pt_gp_list) {
 
 			if (!tg_pt_gp->tg_pt_gp_valid_id)
@@ -981,7 +975,7 @@ int core_alua_do_port_transition(
 			}
 			atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
 			smp_mb__after_atomic_inc();
-			spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+			spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 			/*
 			 * core_alua_do_transition_tg_pt() will always return
 			 * success.
@@ -989,11 +983,11 @@ int core_alua_do_port_transition(
 			core_alua_do_transition_tg_pt(tg_pt_gp, port,
 					nacl, md_buf, new_state, explict);
 
-			spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+			spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 			atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
 			smp_mb__after_atomic_dec();
 		}
-		spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+		spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 
 		spin_lock(&lu_gp->lu_gp_lock);
 		atomic_dec(&lu_gp_mem->lu_gp_mem_ref_cnt);
@@ -1268,14 +1262,9 @@ void core_alua_free_lu_gp(struct t10_alua_lu_gp *lu_gp)
 
 void core_alua_free_lu_gp_mem(struct se_device *dev)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
-	struct t10_alua *alua = &su_dev->t10_alua;
 	struct t10_alua_lu_gp *lu_gp;
 	struct t10_alua_lu_gp_member *lu_gp_mem;
 
-	if (alua->alua_type != SPC3_ALUA_EMULATED)
-		return;
-
 	lu_gp_mem = dev->dev_alua_lu_gp_mem;
 	if (!lu_gp_mem)
 		return;
@@ -1358,10 +1347,8 @@ void __core_alua_drop_lu_gp_mem(
 	spin_unlock(&lu_gp->lu_gp_lock);
 }
 
-struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
-	struct se_subsystem_dev *su_dev,
-	const char *name,
-	int def_group)
+struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(struct se_device *dev,
+		const char *name, int def_group)
 {
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 
@@ -1375,7 +1362,7 @@ struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
 	mutex_init(&tg_pt_gp->tg_pt_gp_md_mutex);
 	spin_lock_init(&tg_pt_gp->tg_pt_gp_lock);
 	atomic_set(&tg_pt_gp->tg_pt_gp_ref_cnt, 0);
-	tg_pt_gp->tg_pt_gp_su_dev = su_dev;
+	tg_pt_gp->tg_pt_gp_dev = dev;
 	tg_pt_gp->tg_pt_gp_md_buf_len = ALUA_MD_BUF_LEN;
 	atomic_set(&tg_pt_gp->tg_pt_gp_alua_access_state,
 		ALUA_ACCESS_STATE_ACTIVE_OPTMIZED);
@@ -1392,14 +1379,14 @@ struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
 	tg_pt_gp->tg_pt_gp_implict_trans_secs = ALUA_DEFAULT_IMPLICT_TRANS_SECS;
 
 	if (def_group) {
-		spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+		spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 		tg_pt_gp->tg_pt_gp_id =
-				su_dev->t10_alua.alua_tg_pt_gps_counter++;
+				dev->t10_alua.alua_tg_pt_gps_counter++;
 		tg_pt_gp->tg_pt_gp_valid_id = 1;
-		su_dev->t10_alua.alua_tg_pt_gps_count++;
+		dev->t10_alua.alua_tg_pt_gps_count++;
 		list_add_tail(&tg_pt_gp->tg_pt_gp_list,
-			      &su_dev->t10_alua.tg_pt_gps_list);
-		spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+			      &dev->t10_alua.tg_pt_gps_list);
+		spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 	}
 
 	return tg_pt_gp;
@@ -1409,9 +1396,10 @@ int core_alua_set_tg_pt_gp_id(
 	struct t10_alua_tg_pt_gp *tg_pt_gp,
 	u16 tg_pt_gp_id)
 {
-	struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+	struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
 	struct t10_alua_tg_pt_gp *tg_pt_gp_tmp;
 	u16 tg_pt_gp_id_tmp;
+
 	/*
 	 * The tg_pt_gp->tg_pt_gp_id may only be set once..
 	 */
@@ -1421,19 +1409,19 @@ int core_alua_set_tg_pt_gp_id(
 		return -EINVAL;
 	}
 
-	spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
-	if (su_dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) {
+	spin_lock(&dev->t10_alua.tg_pt_gps_lock);
+	if (dev->t10_alua.alua_tg_pt_gps_count == 0x0000ffff) {
 		pr_err("Maximum ALUA alua_tg_pt_gps_count:"
 			" 0x0000ffff reached\n");
-		spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+		spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 		kmem_cache_free(t10_alua_tg_pt_gp_cache, tg_pt_gp);
 		return -ENOSPC;
 	}
 again:
 	tg_pt_gp_id_tmp = (tg_pt_gp_id != 0) ? tg_pt_gp_id :
-			su_dev->t10_alua.alua_tg_pt_gps_counter++;
+			dev->t10_alua.alua_tg_pt_gps_counter++;
 
-	list_for_each_entry(tg_pt_gp_tmp, &su_dev->t10_alua.tg_pt_gps_list,
+	list_for_each_entry(tg_pt_gp_tmp, &dev->t10_alua.tg_pt_gps_list,
 			tg_pt_gp_list) {
 		if (tg_pt_gp_tmp->tg_pt_gp_id == tg_pt_gp_id_tmp) {
 			if (!tg_pt_gp_id)
@@ -1441,7 +1429,7 @@ again:
 
 			pr_err("ALUA Target Port Group ID: %hu already"
 				" exists, ignoring request\n", tg_pt_gp_id);
-			spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+			spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 			return -EINVAL;
 		}
 	}
@@ -1449,9 +1437,9 @@ again:
 	tg_pt_gp->tg_pt_gp_id = tg_pt_gp_id_tmp;
 	tg_pt_gp->tg_pt_gp_valid_id = 1;
 	list_add_tail(&tg_pt_gp->tg_pt_gp_list,
-			&su_dev->t10_alua.tg_pt_gps_list);
-	su_dev->t10_alua.alua_tg_pt_gps_count++;
-	spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+			&dev->t10_alua.tg_pt_gps_list);
+	dev->t10_alua.alua_tg_pt_gps_count++;
+	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 
 	return 0;
 }
@@ -1480,8 +1468,9 @@ struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
 void core_alua_free_tg_pt_gp(
 	struct t10_alua_tg_pt_gp *tg_pt_gp)
 {
-	struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+	struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *tg_pt_gp_mem_tmp;
+
 	/*
 	 * Once we have reached this point, config_item_put() has already
 	 * been called from target_core_alua_drop_tg_pt_gp().
@@ -1490,10 +1479,11 @@ void core_alua_free_tg_pt_gp(
 	 * no assications *OR* explict ALUA via SET_TARGET_PORT_GROUPS
 	 * can be made while we are releasing struct t10_alua_tg_pt_gp.
 	 */
-	spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+	spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 	list_del(&tg_pt_gp->tg_pt_gp_list);
-	su_dev->t10_alua.alua_tg_pt_gps_counter--;
-	spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+	dev->t10_alua.alua_tg_pt_gps_counter--;
+	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
+
 	/*
 	 * Allow a struct t10_alua_tg_pt_gp_member * referenced by
 	 * core_alua_get_tg_pt_gp_by_name() in
@@ -1502,6 +1492,7 @@ void core_alua_free_tg_pt_gp(
 	 */
 	while (atomic_read(&tg_pt_gp->tg_pt_gp_ref_cnt))
 		cpu_relax();
+
 	/*
 	 * Release reference to struct t10_alua_tg_pt_gp from all associated
 	 * struct se_port.
@@ -1525,9 +1516,9 @@ void core_alua_free_tg_pt_gp(
 		 * default_tg_pt_gp.
 		 */
 		spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
-		if (tg_pt_gp != su_dev->t10_alua.default_tg_pt_gp) {
+		if (tg_pt_gp != dev->t10_alua.default_tg_pt_gp) {
 			__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
-					su_dev->t10_alua.default_tg_pt_gp);
+					dev->t10_alua.default_tg_pt_gp);
 		} else
 			tg_pt_gp_mem->tg_pt_gp = NULL;
 		spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
@@ -1541,14 +1532,9 @@ void core_alua_free_tg_pt_gp(
 
 void core_alua_free_tg_pt_gp_mem(struct se_port *port)
 {
-	struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
-	struct t10_alua *alua = &su_dev->t10_alua;
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
 
-	if (alua->alua_type != SPC3_ALUA_EMULATED)
-		return;
-
 	tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
 	if (!tg_pt_gp_mem)
 		return;
@@ -1574,25 +1560,24 @@ void core_alua_free_tg_pt_gp_mem(struct se_port *port)
 }
 
 static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name(
-	struct se_subsystem_dev *su_dev,
-	const char *name)
+		struct se_device *dev, const char *name)
 {
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct config_item *ci;
 
-	spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
-	list_for_each_entry(tg_pt_gp, &su_dev->t10_alua.tg_pt_gps_list,
+	spin_lock(&dev->t10_alua.tg_pt_gps_lock);
+	list_for_each_entry(tg_pt_gp, &dev->t10_alua.tg_pt_gps_list,
 			tg_pt_gp_list) {
 		if (!tg_pt_gp->tg_pt_gp_valid_id)
 			continue;
 		ci = &tg_pt_gp->tg_pt_gp_group.cg_item;
 		if (!strcmp(config_item_name(ci), name)) {
 			atomic_inc(&tg_pt_gp->tg_pt_gp_ref_cnt);
-			spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+			spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 			return tg_pt_gp;
 		}
 	}
-	spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 
 	return NULL;
 }
@@ -1600,11 +1585,11 @@ static struct t10_alua_tg_pt_gp *core_alua_get_tg_pt_gp_by_name(
 static void core_alua_put_tg_pt_gp_from_name(
 	struct t10_alua_tg_pt_gp *tg_pt_gp)
 {
-	struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+	struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
 
-	spin_lock(&su_dev->t10_alua.tg_pt_gps_lock);
+	spin_lock(&dev->t10_alua.tg_pt_gps_lock);
 	atomic_dec(&tg_pt_gp->tg_pt_gp_ref_cnt);
-	spin_unlock(&su_dev->t10_alua.tg_pt_gps_lock);
+	spin_unlock(&dev->t10_alua.tg_pt_gps_lock);
 }
 
 /*
@@ -1640,16 +1625,11 @@ static void __core_alua_drop_tg_pt_gp_mem(
 
 ssize_t core_alua_show_tg_pt_gp_info(struct se_port *port, char *page)
 {
-	struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
 	struct config_item *tg_pt_ci;
-	struct t10_alua *alua = &su_dev->t10_alua;
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
 	ssize_t len = 0;
 
-	if (alua->alua_type != SPC3_ALUA_EMULATED)
-		return len;
-
 	tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
 	if (!tg_pt_gp_mem)
 		return len;
@@ -1683,7 +1663,7 @@ ssize_t core_alua_store_tg_pt_gp_info(
 {
 	struct se_portal_group *tpg;
 	struct se_lun *lun;
-	struct se_subsystem_dev *su_dev = port->sep_lun->lun_se_dev->se_sub_dev;
+	struct se_device *dev = port->sep_lun->lun_se_dev;
 	struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *tg_pt_gp_new = NULL;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
 	unsigned char buf[TG_PT_GROUP_NAME_BUF];
@@ -1692,13 +1672,9 @@ ssize_t core_alua_store_tg_pt_gp_info(
 	tpg = port->sep_tpg;
 	lun = port->sep_lun;
 
-	if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
-		pr_warn("SPC3_ALUA_EMULATED not enabled for"
-			" %s/tpgt_%hu/%s\n", tpg->se_tpg_tfo->tpg_get_wwn(tpg),
-			tpg->se_tpg_tfo->tpg_get_tag(tpg),
-			config_item_name(&lun->lun_group.cg_item));
-		return -EINVAL;
-	}
+	tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
+	if (!tg_pt_gp_mem)
+		return 0;
 
 	if (count > TG_PT_GROUP_NAME_BUF) {
 		pr_err("ALUA Target Port Group alias too large!\n");
@@ -1716,18 +1692,11 @@ ssize_t core_alua_store_tg_pt_gp_info(
 		 * struct t10_alua_tg_pt_gp.  This reference is released with
 		 * core_alua_put_tg_pt_gp_from_name() below.
 		 */
-		tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(su_dev,
+		tg_pt_gp_new = core_alua_get_tg_pt_gp_by_name(dev,
 					strstrip(buf));
 		if (!tg_pt_gp_new)
 			return -ENODEV;
 	}
-	tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
-	if (!tg_pt_gp_mem) {
-		if (tg_pt_gp_new)
-			core_alua_put_tg_pt_gp_from_name(tg_pt_gp_new);
-		pr_err("NULL struct se_port->sep_alua_tg_pt_gp_mem pointer\n");
-		return -EINVAL;
-	}
 
 	spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 	tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
@@ -1750,7 +1719,7 @@ ssize_t core_alua_store_tg_pt_gp_info(
 
 			__core_alua_drop_tg_pt_gp_mem(tg_pt_gp_mem, tg_pt_gp);
 			__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
-					su_dev->t10_alua.default_tg_pt_gp);
+					dev->t10_alua.default_tg_pt_gp);
 			spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 
 			return count;
@@ -2054,32 +2023,12 @@ ssize_t core_alua_store_secondary_write_metadata(
 	return count;
 }
 
-int core_setup_alua(struct se_device *dev, int force_pt)
+int core_setup_alua(struct se_device *dev)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
-	struct t10_alua *alua = &su_dev->t10_alua;
-	struct t10_alua_lu_gp_member *lu_gp_mem;
-	/*
-	 * If this device is from Target_Core_Mod/pSCSI, use the ALUA logic
-	 * of the Underlying SCSI hardware.  In Linux/SCSI terms, this can
-	 * cause a problem because libata and some SATA RAID HBAs appear
-	 * under Linux/SCSI, but emulate SCSI logic themselves.
-	 */
-	if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
-	    !(dev->se_sub_dev->se_dev_attrib.emulate_alua)) || force_pt) {
-		alua->alua_type = SPC_ALUA_PASSTHROUGH;
-		alua->alua_state_check = &core_alua_state_check_nop;
-		pr_debug("%s: Using SPC_ALUA_PASSTHROUGH, no ALUA"
-			" emulation\n", dev->transport->name);
-		return 0;
-	}
-	/*
-	 * If SPC-3 or above is reported by real or emulated struct se_device,
-	 * use emulated ALUA.
-	 */
-	if (dev->transport->get_device_rev(dev) >= SCSI_3) {
-		pr_debug("%s: Enabling ALUA Emulation for SPC-3"
-			" device\n", dev->transport->name);
+	if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
+	    !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
+		struct t10_alua_lu_gp_member *lu_gp_mem;
+
 		/*
 		 * Associate this struct se_device with the default ALUA
 		 * LUN Group.
@@ -2088,8 +2037,6 @@ int core_setup_alua(struct se_device *dev, int force_pt)
 		if (IS_ERR(lu_gp_mem))
 			return PTR_ERR(lu_gp_mem);
 
-		alua->alua_type = SPC3_ALUA_EMULATED;
-		alua->alua_state_check = &core_alua_state_check;
 		spin_lock(&lu_gp_mem->lu_gp_mem_lock);
 		__core_alua_attach_lu_gp_mem(lu_gp_mem,
 				default_lu_gp);
@@ -2098,11 +2045,6 @@ int core_setup_alua(struct se_device *dev, int force_pt)
 		pr_debug("%s: Adding to default ALUA LU Group:"
 			" core/alua/lu_gps/default_lu_gp\n",
 			dev->transport->name);
-	} else {
-		alua->alua_type = SPC2_ALUA_DISABLED;
-		alua->alua_state_check = &core_alua_state_check_nop;
-		pr_debug("%s: Disabling ALUA Emulation for SPC-2"
-			" device\n", dev->transport->name);
 	}
 
 	return 0;

drivers/target/target_core_alua.h

@@ -72,8 +72,8 @@ extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
 extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
 extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
 
-extern int target_emulate_report_target_port_groups(struct se_cmd *);
-extern int target_emulate_set_target_port_groups(struct se_cmd *);
+extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *);
+extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *);
 extern int core_alua_check_nonop_delay(struct se_cmd *);
 extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
 				struct se_device *, struct se_port *,
@@ -91,7 +91,7 @@ extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
 					struct t10_alua_lu_gp *);
 extern void core_alua_drop_lu_gp_dev(struct se_device *);
 extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
-			struct se_subsystem_dev *, const char *, int);
+			struct se_device *, const char *, int);
 extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
 extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
 					struct se_port *);
@@ -131,6 +131,7 @@ extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
 					char *);
 extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
 					const char *, size_t);
-extern int core_setup_alua(struct se_device *, int);
+extern int core_setup_alua(struct se_device *);
+extern sense_reason_t target_alua_state_check(struct se_cmd *cmd);
 
 #endif /* TARGET_CORE_ALUA_H */

drivers/target/target_core_configfs.c

@@ -3,8 +3,7 @@
  *
  * This file contains ConfigFS logic for the Generic Target Engine project.
  *
- * Copyright (c) 2008-2011 Rising Tide Systems
- * Copyright (c) 2008-2011 Linux-iSCSI.org
+ * (c) Copyright 2008-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -565,21 +564,8 @@ static ssize_t target_core_dev_show_attr_##_name(			\
 	struct se_dev_attrib *da,					\
 	char *page)							\
 {									\
-	struct se_device *dev;						\
-	struct se_subsystem_dev *se_dev = da->da_sub_dev;			\
-	ssize_t rb;							\
-									\
-	spin_lock(&se_dev->se_dev_lock);				\
-	dev = se_dev->se_dev_ptr;					\
-	if (!dev) {							\
-		spin_unlock(&se_dev->se_dev_lock); 			\
-		return -ENODEV;						\
-	}								\
-	rb = snprintf(page, PAGE_SIZE, "%u\n",				\
-		(u32)dev->se_sub_dev->se_dev_attrib._name);		\
-	spin_unlock(&se_dev->se_dev_lock);				\
-									\
-	return rb;							\
+	return snprintf(page, PAGE_SIZE, "%u\n",			\
+		(u32)da->da_dev->dev_attrib._name);			\
 }
 
 #define DEF_DEV_ATTRIB_STORE(_name)					\
@@ -588,26 +574,16 @@ static ssize_t target_core_dev_store_attr_##_name(			\
 	const char *page,						\
 	size_t count)							\
 {									\
-	struct se_device *dev;						\
-	struct se_subsystem_dev *se_dev = da->da_sub_dev;			\
 	unsigned long val;						\
 	int ret;							\
 									\
-	spin_lock(&se_dev->se_dev_lock);				\
-	dev = se_dev->se_dev_ptr;					\
-	if (!dev) {							\
-		spin_unlock(&se_dev->se_dev_lock);			\
-		return -ENODEV;						\
-	}								\
 	ret = strict_strtoul(page, 0, &val);				\
 	if (ret < 0) {							\
-		spin_unlock(&se_dev->se_dev_lock);                      \
 		pr_err("strict_strtoul() failed with"		\
 			" ret: %d\n", ret);				\
 		return -EINVAL;						\
 	}								\
-	ret = se_dev_set_##_name(dev, (u32)val);			\
-	spin_unlock(&se_dev->se_dev_lock);				\
+	ret = se_dev_set_##_name(da->da_dev, (u32)val);			\
 									\
 	return (!ret) ? count : -EINVAL;				\
 }
@@ -699,6 +675,9 @@ SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
 DEF_DEV_ATTRIB(unmap_granularity_alignment);
 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
 
+DEF_DEV_ATTRIB(max_write_same_len);
+SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
+
 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
 
 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
@@ -724,6 +703,7 @@ static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
 	&target_core_dev_attrib_max_unmap_block_desc_count.attr,
 	&target_core_dev_attrib_unmap_granularity.attr,
 	&target_core_dev_attrib_unmap_granularity_alignment.attr,
+	&target_core_dev_attrib_max_write_same_len.attr,
 	NULL,
 };
 
@@ -764,13 +744,6 @@ static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
 	struct t10_wwn *t10_wwn,
 	char *page)
 {
-	struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
-	struct se_device *dev;
-
-	dev = se_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
 	return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
 		&t10_wwn->unit_serial[0]);
 }
@@ -780,8 +753,7 @@ static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 	const char *page,
 	size_t count)
 {
-	struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
-	struct se_device *dev;
+	struct se_device *dev = t10_wwn->t10_dev;
 	unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
 
 	/*
@@ -794,7 +766,7 @@ static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 	 * it is doing 'the right thing' wrt a world wide unique
 	 * VPD Unit Serial Number that OS dependent multipath can depend on.
 	 */
-	if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
+	if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
 		pr_err("Underlying SCSI device firmware provided VPD"
 			" Unit Serial, ignoring request\n");
 		return -EOPNOTSUPP;
@@ -811,15 +783,13 @@ static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 	 * (underneath the initiator side OS dependent multipath code)
 	 * could cause negative effects.
 	 */
-	dev = su_dev->se_dev_ptr;
-	if (dev) {
-		if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
-			pr_err("Unable to set VPD Unit Serial while"
-				" active %d $FABRIC_MOD exports exist\n",
-				atomic_read(&dev->dev_export_obj.obj_access_count));
-			return -EINVAL;
-		}
+	if (dev->export_count) {
+		pr_err("Unable to set VPD Unit Serial while"
+			" active %d $FABRIC_MOD exports exist\n",
+			dev->export_count);
+		return -EINVAL;
 	}
+
 	/*
 	 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
 	 *
@@ -828,12 +798,12 @@ static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 	 */
 	memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
 	snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
-	snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
+	snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
 			"%s", strstrip(buf));
-	su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
+	dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
 
 	pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
-			" %s\n", su_dev->t10_wwn.unit_serial);
+			" %s\n", dev->t10_wwn.unit_serial);
 
 	return count;
 }
@@ -847,16 +817,10 @@ static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 	struct t10_wwn *t10_wwn,
 	char *page)
 {
-	struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
-	struct se_device *dev;
 	struct t10_vpd *vpd;
 	unsigned char buf[VPD_TMP_BUF_SIZE];
 	ssize_t len = 0;
 
-	dev = se_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
 	memset(buf, 0, VPD_TMP_BUF_SIZE);
 
 	spin_lock(&t10_wwn->t10_vpd_lock);
@@ -894,16 +858,10 @@ static ssize_t target_core_dev_wwn_show_attr_##_name(			\
 	struct t10_wwn *t10_wwn,					\
 	char *page)							\
 {									\
-	struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;		\
-	struct se_device *dev;						\
 	struct t10_vpd *vpd;							\
 	unsigned char buf[VPD_TMP_BUF_SIZE];				\
 	ssize_t len = 0;						\
 									\
-	dev = se_dev->se_dev_ptr;					\
-	if (!dev)							\
-		return -ENODEV;						\
-									\
 	spin_lock(&t10_wwn->t10_vpd_lock);				\
 	list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {	\
 		if (vpd->association != _assoc)				\
@@ -1003,7 +961,7 @@ static struct config_item_type target_core_dev_wwn_cit = {
 
 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
 
-CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
+CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
 #define SE_DEV_PR_ATTR(_name, _mode)					\
 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
 	__CONFIGFS_EATTR(_name, _mode,					\
@@ -1015,13 +973,8 @@ static struct target_core_dev_pr_attribute target_core_dev_pr_##_name =	\
 	__CONFIGFS_EATTR_RO(_name,					\
 	target_core_dev_pr_show_attr_##_name);
 
-/*
- * res_holder
- */
-static ssize_t target_core_dev_pr_show_spc3_res(
-	struct se_device *dev,
-	char *page,
-	ssize_t *len)
+static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
+		char *page)
 {
 	struct se_node_acl *se_nacl;
 	struct t10_pr_registration *pr_reg;
@@ -1030,134 +983,82 @@ static ssize_t target_core_dev_pr_show_spc3_res(
 
 	memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 
-	spin_lock(&dev->dev_reservation_lock);
 	pr_reg = dev->dev_pr_res_holder;
-	if (!pr_reg) {
-		*len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
-		spin_unlock(&dev->dev_reservation_lock);
-		return *len;
-	}
+	if (!pr_reg)
+		return sprintf(page, "No SPC-3 Reservation holder\n");
+
 	se_nacl = pr_reg->pr_reg_nacl;
 	prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
 				PR_REG_ISID_ID_LEN);
 
-	*len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
+	return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
 		se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 		se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
-	spin_unlock(&dev->dev_reservation_lock);
-
-	return *len;
 }
 
-static ssize_t target_core_dev_pr_show_spc2_res(
-	struct se_device *dev,
-	char *page,
-	ssize_t *len)
+static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
+		char *page)
 {
 	struct se_node_acl *se_nacl;
+	ssize_t len;
 
-	spin_lock(&dev->dev_reservation_lock);
 	se_nacl = dev->dev_reserved_node_acl;
-	if (!se_nacl) {
-		*len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
-		spin_unlock(&dev->dev_reservation_lock);
-		return *len;
+	if (se_nacl) {
+		len = sprintf(page,
+			      "SPC-2 Reservation: %s Initiator: %s\n",
+			      se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+			      se_nacl->initiatorname);
+	} else {
+		len = sprintf(page, "No SPC-2 Reservation holder\n");
 	}
-	*len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
-		se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
-		se_nacl->initiatorname);
-	spin_unlock(&dev->dev_reservation_lock);
-
-	return *len;
+	return len;
 }
 
-static ssize_t target_core_dev_pr_show_attr_res_holder(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
+		char *page)
 {
-	ssize_t len = 0;
+	int ret;
 
-	if (!su_dev->se_dev_ptr)
-		return -ENODEV;
-
-	switch (su_dev->t10_pr.res_type) {
-	case SPC3_PERSISTENT_RESERVATIONS:
-		target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
-				page, &len);
-		break;
-	case SPC2_RESERVATIONS:
-		target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
-				page, &len);
-		break;
-	case SPC_PASSTHROUGH:
-		len += sprintf(page+len, "Passthrough\n");
-		break;
-	default:
-		len += sprintf(page+len, "Unknown\n");
-		break;
-	}
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+		return sprintf(page, "Passthrough\n");
 
-	return len;
+	spin_lock(&dev->dev_reservation_lock);
+	if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+		ret = target_core_dev_pr_show_spc2_res(dev, page);
+	else
+		ret = target_core_dev_pr_show_spc3_res(dev, page);
+	spin_unlock(&dev->dev_reservation_lock);
+	return ret;
 }
 
 SE_DEV_PR_ATTR_RO(res_holder);
 
-/*
- * res_pr_all_tgt_pts
- */
 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	struct se_device *dev;
-	struct t10_pr_registration *pr_reg;
 	ssize_t len = 0;
 
-	dev = su_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
-		return len;
-
 	spin_lock(&dev->dev_reservation_lock);
-	pr_reg = dev->dev_pr_res_holder;
-	if (!pr_reg) {
+	if (!dev->dev_pr_res_holder) {
 		len = sprintf(page, "No SPC-3 Reservation holder\n");
-		spin_unlock(&dev->dev_reservation_lock);
-		return len;
-	}
-	/*
-	 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
-	 * Basic PERSISTENT RESERVER OUT parameter list, page 290
-	 */
-	if (pr_reg->pr_reg_all_tg_pt)
+	} else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
 		len = sprintf(page, "SPC-3 Reservation: All Target"
 			" Ports registration\n");
-	else
+	} else {
 		len = sprintf(page, "SPC-3 Reservation: Single"
 			" Target Port registration\n");
-	spin_unlock(&dev->dev_reservation_lock);
+	}
 
+	spin_unlock(&dev->dev_reservation_lock);
 	return len;
 }
 
 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
 
-/*
- * res_pr_generation
- */
 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	if (!su_dev->se_dev_ptr)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
-		return 0;
-
-	return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
+	return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
 }
 
 SE_DEV_PR_ATTR_RO(res_pr_generation);
@@ -1166,10 +1067,8 @@ SE_DEV_PR_ATTR_RO(res_pr_generation);
  * res_pr_holder_tg_port
  */
 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	struct se_device *dev;
 	struct se_node_acl *se_nacl;
 	struct se_lun *lun;
 	struct se_portal_group *se_tpg;
@@ -1177,20 +1076,13 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 	struct target_core_fabric_ops *tfo;
 	ssize_t len = 0;
 
-	dev = su_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
-		return len;
-
 	spin_lock(&dev->dev_reservation_lock);
 	pr_reg = dev->dev_pr_res_holder;
 	if (!pr_reg) {
 		len = sprintf(page, "No SPC-3 Reservation holder\n");
-		spin_unlock(&dev->dev_reservation_lock);
-		return len;
+		goto out_unlock;
 	}
+
 	se_nacl = pr_reg->pr_reg_nacl;
 	se_tpg = se_nacl->se_tpg;
 	lun = pr_reg->pr_reg_tg_pt_lun;
@@ -1204,19 +1096,16 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
 		" %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
 		tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
 		tfo->get_fabric_name(), lun->unpacked_lun);
-	spin_unlock(&dev->dev_reservation_lock);
 
+out_unlock:
+	spin_unlock(&dev->dev_reservation_lock);
 	return len;
 }
 
 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
 
-/*
- * res_pr_registered_i_pts
- */
 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
 	struct target_core_fabric_ops *tfo;
 	struct t10_pr_registration *pr_reg;
@@ -1225,16 +1114,10 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 	ssize_t len = 0;
 	int reg_count = 0, prf_isid;
 
-	if (!su_dev->se_dev_ptr)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
-		return len;
-
 	len += sprintf(page+len, "SPC-3 PR Registrations:\n");
 
-	spin_lock(&su_dev->t10_pr.registration_lock);
-	list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
+	spin_lock(&dev->t10_pr.registration_lock);
+	list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 			pr_reg_list) {
 
 		memset(buf, 0, 384);
@@ -1254,7 +1137,7 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 		len += sprintf(page+len, "%s", buf);
 		reg_count++;
 	}
-	spin_unlock(&su_dev->t10_pr.registration_lock);
+	spin_unlock(&dev->t10_pr.registration_lock);
 
 	if (!reg_count)
 		len += sprintf(page+len, "None\n");
@@ -1264,88 +1147,48 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 
 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
 
-/*
- * res_pr_type
- */
 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	struct se_device *dev;
 	struct t10_pr_registration *pr_reg;
 	ssize_t len = 0;
 
-	dev = su_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
-		return len;
-
 	spin_lock(&dev->dev_reservation_lock);
 	pr_reg = dev->dev_pr_res_holder;
-	if (!pr_reg) {
+	if (pr_reg) {
+		len = sprintf(page, "SPC-3 Reservation Type: %s\n",
+			core_scsi3_pr_dump_type(pr_reg->pr_res_type));
+	} else {
 		len = sprintf(page, "No SPC-3 Reservation holder\n");
-		spin_unlock(&dev->dev_reservation_lock);
-		return len;
 	}
-	len = sprintf(page, "SPC-3 Reservation Type: %s\n",
-		core_scsi3_pr_dump_type(pr_reg->pr_res_type));
-	spin_unlock(&dev->dev_reservation_lock);
 
+	spin_unlock(&dev->dev_reservation_lock);
 	return len;
 }
 
 SE_DEV_PR_ATTR_RO(res_pr_type);
 
-/*
- * res_type
- */
 static ssize_t target_core_dev_pr_show_attr_res_type(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	ssize_t len = 0;
-
-	if (!su_dev->se_dev_ptr)
-		return -ENODEV;
-
-	switch (su_dev->t10_pr.res_type) {
-	case SPC3_PERSISTENT_RESERVATIONS:
-		len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
-		break;
-	case SPC2_RESERVATIONS:
-		len = sprintf(page, "SPC2_RESERVATIONS\n");
-		break;
-	case SPC_PASSTHROUGH:
-		len = sprintf(page, "SPC_PASSTHROUGH\n");
-		break;
-	default:
-		len = sprintf(page, "UNKNOWN\n");
-		break;
-	}
-
-	return len;
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+		return sprintf(page, "SPC_PASSTHROUGH\n");
+	else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+		return sprintf(page, "SPC2_RESERVATIONS\n");
+	else
+		return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
 }
 
 SE_DEV_PR_ATTR_RO(res_type);
 
-/*
- * res_aptpl_active
- */
-
 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	if (!su_dev->se_dev_ptr)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 		return 0;
 
 	return sprintf(page, "APTPL Bit Status: %s\n",
-		(su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
+		(dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
 }
 
 SE_DEV_PR_ATTR_RO(res_aptpl_active);
@@ -1354,13 +1197,9 @@ SE_DEV_PR_ATTR_RO(res_aptpl_active);
  * res_aptpl_metadata
  */
 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
-	struct se_subsystem_dev *su_dev,
-	char *page)
+		struct se_device *dev, char *page)
 {
-	if (!su_dev->se_dev_ptr)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 		return 0;
 
 	return sprintf(page, "Ready to process PR APTPL metadata..\n");
@@ -1392,11 +1231,10 @@ static match_table_t tokens = {
 };
 
 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
-	struct se_subsystem_dev *su_dev,
+	struct se_device *dev,
 	const char *page,
 	size_t count)
 {
-	struct se_device *dev;
 	unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
 	unsigned char *t_fabric = NULL, *t_port = NULL;
 	char *orig, *ptr, *arg_p, *opts;
@@ -1408,14 +1246,12 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
 	u16 port_rpti = 0, tpgt = 0;
 	u8 type = 0, scope;
 
-	dev = su_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+		return 0;
+	if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 		return 0;
 
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_debug("Unable to process APTPL metadata while"
 			" active fabric exports exist\n");
 		return -EINVAL;
@@ -1558,7 +1394,7 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
 		goto out;
 	}
 
-	ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
+	ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
 			i_port, isid, mapped_lun, t_port, tpgt, target_lun,
 			res_holder, all_tg_pt, type);
 out:
@@ -1573,7 +1409,7 @@ out:
 
 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
 
-CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
+CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
 
 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
 	&target_core_dev_pr_res_holder.attr,
@@ -1605,18 +1441,14 @@ static struct config_item_type target_core_dev_pr_cit = {
 
 static ssize_t target_core_show_dev_info(void *p, char *page)
 {
-	struct se_subsystem_dev *se_dev = p;
-	struct se_hba *hba = se_dev->se_dev_hba;
-	struct se_subsystem_api *t = hba->transport;
+	struct se_device *dev = p;
+	struct se_subsystem_api *t = dev->transport;
 	int bl = 0;
 	ssize_t read_bytes = 0;
 
-	if (!se_dev->se_dev_ptr)
-		return -ENODEV;
-
-	transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
+	transport_dump_dev_state(dev, page, &bl);
 	read_bytes += bl;
-	read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
+	read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
 	return read_bytes;
 }
 
@@ -1633,17 +1465,10 @@ static ssize_t target_core_store_dev_control(
 	const char *page,
 	size_t count)
 {
-	struct se_subsystem_dev *se_dev = p;
-	struct se_hba *hba = se_dev->se_dev_hba;
-	struct se_subsystem_api *t = hba->transport;
+	struct se_device *dev = p;
+	struct se_subsystem_api *t = dev->transport;
 
-	if (!se_dev->se_dev_su_ptr) {
-		pr_err("Unable to locate struct se_subsystem_dev>se"
-				"_dev_su_ptr\n");
-		return -EINVAL;
-	}
-
-	return t->set_configfs_dev_params(hba, se_dev, page, count);
+	return t->set_configfs_dev_params(dev, page, count);
 }
 
 static struct target_core_configfs_attribute target_core_attr_dev_control = {
@@ -1656,12 +1481,12 @@ static struct target_core_configfs_attribute target_core_attr_dev_control = {
 
 static ssize_t target_core_show_dev_alias(void *p, char *page)
 {
-	struct se_subsystem_dev *se_dev = p;
+	struct se_device *dev = p;
 
-	if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
+	if (!(dev->dev_flags & DF_USING_ALIAS))
 		return 0;
 
-	return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
+	return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
 }
 
 static ssize_t target_core_store_dev_alias(
@@ -1669,8 +1494,8 @@ static ssize_t target_core_store_dev_alias(
 	const char *page,
 	size_t count)
 {
-	struct se_subsystem_dev *se_dev = p;
-	struct se_hba *hba = se_dev->se_dev_hba;
+	struct se_device *dev = p;
+	struct se_hba *hba = dev->se_hba;
 	ssize_t read_bytes;
 
 	if (count > (SE_DEV_ALIAS_LEN-1)) {
@@ -1680,19 +1505,18 @@ static ssize_t target_core_store_dev_alias(
 		return -EINVAL;
 	}
 
-	read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
-			"%s", page);
+	read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
 	if (!read_bytes)
 		return -EINVAL;
-	if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
-		se_dev->se_dev_alias[read_bytes - 1] = '\0';
+	if (dev->dev_alias[read_bytes - 1] == '\n')
+		dev->dev_alias[read_bytes - 1] = '\0';
 
-	se_dev->su_dev_flags |= SDF_USING_ALIAS;
+	dev->dev_flags |= DF_USING_ALIAS;
 
 	pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
 		config_item_name(&hba->hba_group.cg_item),
-		config_item_name(&se_dev->se_dev_group.cg_item),
-		se_dev->se_dev_alias);
+		config_item_name(&dev->dev_group.cg_item),
+		dev->dev_alias);
 
 	return read_bytes;
 }
@@ -1707,12 +1531,12 @@ static struct target_core_configfs_attribute target_core_attr_dev_alias = {
 
 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
 {
-	struct se_subsystem_dev *se_dev = p;
+	struct se_device *dev = p;
 
-	if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
+	if (!(dev->dev_flags & DF_USING_UDEV_PATH))
 		return 0;
 
-	return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
+	return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
 }
 
 static ssize_t target_core_store_dev_udev_path(
@@ -1720,8 +1544,8 @@ static ssize_t target_core_store_dev_udev_path(
 	const char *page,
 	size_t count)
 {
-	struct se_subsystem_dev *se_dev = p;
-	struct se_hba *hba = se_dev->se_dev_hba;
+	struct se_device *dev = p;
+	struct se_hba *hba = dev->se_hba;
 	ssize_t read_bytes;
 
 	if (count > (SE_UDEV_PATH_LEN-1)) {
@@ -1731,19 +1555,19 @@ static ssize_t target_core_store_dev_udev_path(
 		return -EINVAL;
 	}
 
-	read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
+	read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
 			"%s", page);
 	if (!read_bytes)
 		return -EINVAL;
-	if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
-		se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
+	if (dev->udev_path[read_bytes - 1] == '\n')
+		dev->udev_path[read_bytes - 1] = '\0';
 
-	se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
+	dev->dev_flags |= DF_USING_UDEV_PATH;
 
 	pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
 		config_item_name(&hba->hba_group.cg_item),
-		config_item_name(&se_dev->se_dev_group.cg_item),
-		se_dev->se_dev_udev_path);
+		config_item_name(&dev->dev_group.cg_item),
+		dev->udev_path);
 
 	return read_bytes;
 }
@@ -1761,11 +1585,9 @@ static ssize_t target_core_store_dev_enable(
 	const char *page,
 	size_t count)
 {
-	struct se_subsystem_dev *se_dev = p;
-	struct se_device *dev;
-	struct se_hba *hba = se_dev->se_dev_hba;
-	struct se_subsystem_api *t = hba->transport;
+	struct se_device *dev = p;
 	char *ptr;
+	int ret;
 
 	ptr = strstr(page, "1");
 	if (!ptr) {
@@ -1773,25 +1595,10 @@ static ssize_t target_core_store_dev_enable(
 				" is \"1\"\n");
 		return -EINVAL;
 	}
-	if (se_dev->se_dev_ptr) {
-		pr_err("se_dev->se_dev_ptr already set for storage"
-				" object\n");
-		return -EEXIST;
-	}
-
-	if (t->check_configfs_dev_params(hba, se_dev) < 0)
-		return -EINVAL;
-
-	dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
-	if (IS_ERR(dev))
-		return PTR_ERR(dev);
-	else if (!dev)
-		return -EINVAL;
-
-	se_dev->se_dev_ptr = dev;
-	pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
-		" %p\n", se_dev->se_dev_ptr);
 
+	ret = target_configure_device(dev);
+	if (ret)
+		return ret;
 	return count;
 }
 
@@ -1805,26 +1612,15 @@ static struct target_core_configfs_attribute target_core_attr_dev_enable = {
 
 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
 {
-	struct se_device *dev;
-	struct se_subsystem_dev *su_dev = p;
+	struct se_device *dev = p;
 	struct config_item *lu_ci;
 	struct t10_alua_lu_gp *lu_gp;
 	struct t10_alua_lu_gp_member *lu_gp_mem;
 	ssize_t len = 0;
 
-	dev = su_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
-
-	if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
-		return len;
-
 	lu_gp_mem = dev->dev_alua_lu_gp_mem;
-	if (!lu_gp_mem) {
-		pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
-				" pointer\n");
-		return -EINVAL;
-	}
+	if (!lu_gp_mem)
+		return 0;
 
 	spin_lock(&lu_gp_mem->lu_gp_mem_lock);
 	lu_gp = lu_gp_mem->lu_gp;
@@ -1843,24 +1639,17 @@ static ssize_t target_core_store_alua_lu_gp(
 	const char *page,
 	size_t count)
 {
-	struct se_device *dev;
-	struct se_subsystem_dev *su_dev = p;
-	struct se_hba *hba = su_dev->se_dev_hba;
+	struct se_device *dev = p;
+	struct se_hba *hba = dev->se_hba;
 	struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
 	struct t10_alua_lu_gp_member *lu_gp_mem;
 	unsigned char buf[LU_GROUP_NAME_BUF];
 	int move = 0;
 
-	dev = su_dev->se_dev_ptr;
-	if (!dev)
-		return -ENODEV;
+	lu_gp_mem = dev->dev_alua_lu_gp_mem;
+	if (!lu_gp_mem)
+		return 0;
 
-	if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
-		pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
-			config_item_name(&hba->hba_group.cg_item),
-			config_item_name(&su_dev->se_dev_group.cg_item));
-		return -EINVAL;
-	}
 	if (count > LU_GROUP_NAME_BUF) {
 		pr_err("ALUA LU Group Alias too large!\n");
 		return -EINVAL;
@@ -1881,14 +1670,6 @@ static ssize_t target_core_store_alua_lu_gp(
 		if (!lu_gp_new)
 			return -ENODEV;
 	}
-	lu_gp_mem = dev->dev_alua_lu_gp_mem;
-	if (!lu_gp_mem) {
-		if (lu_gp_new)
-			core_alua_put_lu_gp_from_name(lu_gp_new);
-		pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
-				" pointer\n");
-		return -EINVAL;
-	}
 
 	spin_lock(&lu_gp_mem->lu_gp_mem_lock);
 	lu_gp = lu_gp_mem->lu_gp;
@@ -1902,7 +1683,7 @@ static ssize_t target_core_store_alua_lu_gp(
 				" from ALUA LU Group: core/alua/lu_gps/%s, ID:"
 				" %hu\n",
 				config_item_name(&hba->hba_group.cg_item),
-				config_item_name(&su_dev->se_dev_group.cg_item),
+				config_item_name(&dev->dev_group.cg_item),
 				config_item_name(&lu_gp->lu_gp_group.cg_item),
 				lu_gp->lu_gp_id);
 
@@ -1927,7 +1708,7 @@ static ssize_t target_core_store_alua_lu_gp(
 		" core/alua/lu_gps/%s, ID: %hu\n",
 		(move) ? "Moving" : "Adding",
 		config_item_name(&hba->hba_group.cg_item),
-		config_item_name(&su_dev->se_dev_group.cg_item),
+		config_item_name(&dev->dev_group.cg_item),
 		config_item_name(&lu_gp_new->lu_gp_group.cg_item),
 		lu_gp_new->lu_gp_id);
 
@@ -1955,69 +1736,44 @@ static struct configfs_attribute *lio_core_dev_attrs[] = {
 
 static void target_core_dev_release(struct config_item *item)
 {
-	struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
-				struct se_subsystem_dev, se_dev_group);
-	struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
-	struct se_subsystem_api *t = hba->transport;
-	struct config_group *dev_cg = &se_dev->se_dev_group;
+	struct config_group *dev_cg = to_config_group(item);
+	struct se_device *dev =
+		container_of(dev_cg, struct se_device, dev_group);
 
 	kfree(dev_cg->default_groups);
-	/*
-	 * This pointer will set when the storage is enabled with:
-	 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
-	 */
-	if (se_dev->se_dev_ptr) {
-		pr_debug("Target_Core_ConfigFS: Calling se_free_"
-			"virtual_device() for se_dev_ptr: %p\n",
-			se_dev->se_dev_ptr);
-
-		se_free_virtual_device(se_dev->se_dev_ptr, hba);
-	} else {
-		/*
-		 * Release struct se_subsystem_dev->se_dev_su_ptr..
-		 */
-		pr_debug("Target_Core_ConfigFS: Calling t->free_"
-			"device() for se_dev_su_ptr: %p\n",
-			se_dev->se_dev_su_ptr);
-
-		t->free_device(se_dev->se_dev_su_ptr);
-	}
-
-	pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
-			"_dev_t: %p\n", se_dev);
-	kfree(se_dev);
+	target_free_device(dev);
 }
 
 static ssize_t target_core_dev_show(struct config_item *item,
 				     struct configfs_attribute *attr,
 				     char *page)
 {
-	struct se_subsystem_dev *se_dev = container_of(
-			to_config_group(item), struct se_subsystem_dev,
-			se_dev_group);
+	struct config_group *dev_cg = to_config_group(item);
+	struct se_device *dev =
+		container_of(dev_cg, struct se_device, dev_group);
 	struct target_core_configfs_attribute *tc_attr = container_of(
 			attr, struct target_core_configfs_attribute, attr);
 
 	if (!tc_attr->show)
 		return -EINVAL;
 
-	return tc_attr->show(se_dev, page);
+	return tc_attr->show(dev, page);
 }
 
 static ssize_t target_core_dev_store(struct config_item *item,
 				      struct configfs_attribute *attr,
 				      const char *page, size_t count)
 {
-	struct se_subsystem_dev *se_dev = container_of(
-			to_config_group(item), struct se_subsystem_dev,
-			se_dev_group);
+	struct config_group *dev_cg = to_config_group(item);
+	struct se_device *dev =
+		container_of(dev_cg, struct se_device, dev_group);
 	struct target_core_configfs_attribute *tc_attr = container_of(
 			attr, struct target_core_configfs_attribute, attr);
 
 	if (!tc_attr->store)
 		return -EINVAL;
 
-	return tc_attr->store(se_dev, page, count);
+	return tc_attr->store(dev, page, count);
 }
 
 static struct configfs_item_operations target_core_dev_item_ops = {
@@ -2107,7 +1863,6 @@ static ssize_t target_core_alua_lu_gp_show_attr_members(
 {
 	struct se_device *dev;
 	struct se_hba *hba;
-	struct se_subsystem_dev *su_dev;
 	struct t10_alua_lu_gp_member *lu_gp_mem;
 	ssize_t len = 0, cur_len;
 	unsigned char buf[LU_GROUP_NAME_BUF];
@@ -2117,12 +1872,11 @@ static ssize_t target_core_alua_lu_gp_show_attr_members(
 	spin_lock(&lu_gp->lu_gp_lock);
 	list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
 		dev = lu_gp_mem->lu_gp_mem_dev;
-		su_dev = dev->se_sub_dev;
-		hba = su_dev->se_dev_hba;
+		hba = dev->se_hba;
 
 		cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
 			config_item_name(&hba->hba_group.cg_item),
-			config_item_name(&su_dev->se_dev_group.cg_item));
+			config_item_name(&dev->dev_group.cg_item));
 		cur_len++; /* Extra byte for NULL terminator */
 
 		if ((cur_len + len) > PAGE_SIZE) {
@@ -2260,7 +2014,7 @@ static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
 	const char *page,
 	size_t count)
 {
-	struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+	struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
 	unsigned long tmp;
 	int new_state, ret;
 
@@ -2284,7 +2038,7 @@ static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
 		return -EINVAL;
 	}
 
-	ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
+	ret = core_alua_do_port_transition(tg_pt_gp, dev,
 					NULL, NULL, new_state, 0);
 	return (!ret) ? count : -EINVAL;
 }
@@ -2620,11 +2374,10 @@ static struct config_group *target_core_alua_create_tg_pt_gp(
 	struct t10_alua *alua = container_of(group, struct t10_alua,
 					alua_tg_pt_gps_group);
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
-	struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
 	struct config_group *alua_tg_pt_gp_cg = NULL;
 	struct config_item *alua_tg_pt_gp_ci = NULL;
 
-	tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
+	tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
 	if (!tg_pt_gp)
 		return NULL;
 
@@ -2721,10 +2474,10 @@ static struct config_group *target_core_make_subdev(
 	const char *name)
 {
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
-	struct se_subsystem_dev *se_dev;
 	struct se_subsystem_api *t;
 	struct config_item *hba_ci = &group->cg_item;
 	struct se_hba *hba = item_to_hba(hba_ci);
+	struct se_device *dev;
 	struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
 	struct config_group *dev_stat_grp = NULL;
 	int errno = -ENOMEM, ret;
@@ -2737,120 +2490,80 @@ static struct config_group *target_core_make_subdev(
 	 */
 	t = hba->transport;
 
-	se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
-	if (!se_dev) {
-		pr_err("Unable to allocate memory for"
-				" struct se_subsystem_dev\n");
-		goto unlock;
-	}
-	INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
-	spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
-	INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
-	INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
-	spin_lock_init(&se_dev->t10_pr.registration_lock);
-	spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
-	INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
-	spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
-	spin_lock_init(&se_dev->se_dev_lock);
-	se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
-	se_dev->t10_wwn.t10_sub_dev = se_dev;
-	se_dev->t10_alua.t10_sub_dev = se_dev;
-	se_dev->se_dev_attrib.da_sub_dev = se_dev;
-
-	se_dev->se_dev_hba = hba;
-	dev_cg = &se_dev->se_dev_group;
-
-	dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
+	dev = target_alloc_device(hba, name);
+	if (!dev)
+		goto out_unlock;
+
+	dev_cg = &dev->dev_group;
+
+	dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
 			GFP_KERNEL);
 	if (!dev_cg->default_groups)
-		goto out;
-	/*
-	 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
-	 * for ->allocate_virtdevice()
-	 *
-	 * se_dev->se_dev_ptr will be set after ->create_virtdev()
-	 * has been called successfully in the next level up in the
-	 * configfs tree for device object's struct config_group.
-	 */
-	se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
-	if (!se_dev->se_dev_su_ptr) {
-		pr_err("Unable to locate subsystem dependent pointer"
-			" from allocate_virtdevice()\n");
-		goto out;
-	}
+		goto out_free_device;
 
-	config_group_init_type_name(&se_dev->se_dev_group, name,
-			&target_core_dev_cit);
-	config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
+	config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
+	config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
 			&target_core_dev_attrib_cit);
-	config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
+	config_group_init_type_name(&dev->dev_pr_group, "pr",
 			&target_core_dev_pr_cit);
-	config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
+	config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
 			&target_core_dev_wwn_cit);
-	config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
+	config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
 			"alua", &target_core_alua_tg_pt_gps_cit);
-	config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
+	config_group_init_type_name(&dev->dev_stat_grps.stat_group,
 			"statistics", &target_core_stat_cit);
 
-	dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
-	dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
-	dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
-	dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
-	dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
+	dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
+	dev_cg->default_groups[1] = &dev->dev_pr_group;
+	dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
+	dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
+	dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
 	dev_cg->default_groups[5] = NULL;
 	/*
 	 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
 	 */
-	tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
+	tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
 	if (!tg_pt_gp)
-		goto out;
+		goto out_free_dev_cg_default_groups;
+	dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
 
-	tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
-	tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
+	tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 				GFP_KERNEL);
 	if (!tg_pt_gp_cg->default_groups) {
 		pr_err("Unable to allocate tg_pt_gp_cg->"
 				"default_groups\n");
-		goto out;
+		goto out_free_tg_pt_gp;
 	}
 
 	config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
 			"default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
 	tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
 	tg_pt_gp_cg->default_groups[1] = NULL;
-	se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
 	/*
 	 * Add core/$HBA/$DEV/statistics/ default groups
 	 */
-	dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
-	dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
+	dev_stat_grp = &dev->dev_stat_grps.stat_group;
+	dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
 				GFP_KERNEL);
 	if (!dev_stat_grp->default_groups) {
 		pr_err("Unable to allocate dev_stat_grp->default_groups\n");
-		goto out;
+		goto out_free_tg_pt_gp_cg_default_groups;
 	}
-	target_stat_setup_dev_default_groups(se_dev);
-
-	pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
-		" %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
+	target_stat_setup_dev_default_groups(dev);
 
 	mutex_unlock(&hba->hba_access_mutex);
-	return &se_dev->se_dev_group;
-out:
-	if (se_dev->t10_alua.default_tg_pt_gp) {
-		core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
-		se_dev->t10_alua.default_tg_pt_gp = NULL;
-	}
-	if (dev_stat_grp)
-		kfree(dev_stat_grp->default_groups);
-	if (tg_pt_gp_cg)
-		kfree(tg_pt_gp_cg->default_groups);
-	if (dev_cg)
-		kfree(dev_cg->default_groups);
-	if (se_dev->se_dev_su_ptr)
-		t->free_device(se_dev->se_dev_su_ptr);
-	kfree(se_dev);
-unlock:
+	return dev_cg;
+
+out_free_tg_pt_gp_cg_default_groups:
+	kfree(tg_pt_gp_cg->default_groups);
+out_free_tg_pt_gp:
+	core_alua_free_tg_pt_gp(tg_pt_gp);
+out_free_dev_cg_default_groups:
+	kfree(dev_cg->default_groups);
+out_free_device:
+	target_free_device(dev);
+out_unlock:
 	mutex_unlock(&hba->hba_access_mutex);
 	return ERR_PTR(errno);
 }
@@ -2859,18 +2572,19 @@ static void target_core_drop_subdev(
 	struct config_group *group,
 	struct config_item *item)
 {
-	struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
-				struct se_subsystem_dev, se_dev_group);
+	struct config_group *dev_cg = to_config_group(item);
+	struct se_device *dev =
+		container_of(dev_cg, struct se_device, dev_group);
 	struct se_hba *hba;
 	struct config_item *df_item;
-	struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
+	struct config_group *tg_pt_gp_cg, *dev_stat_grp;
 	int i;
 
-	hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
+	hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
 
 	mutex_lock(&hba->hba_access_mutex);
 
-	dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
+	dev_stat_grp = &dev->dev_stat_grps.stat_group;
 	for (i = 0; dev_stat_grp->default_groups[i]; i++) {
 		df_item = &dev_stat_grp->default_groups[i]->cg_item;
 		dev_stat_grp->default_groups[i] = NULL;
@@ -2878,7 +2592,7 @@ static void target_core_drop_subdev(
 	}
 	kfree(dev_stat_grp->default_groups);
 
-	tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
+	tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
 	for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
 		df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
 		tg_pt_gp_cg->default_groups[i] = NULL;
@@ -2889,17 +2603,15 @@ static void target_core_drop_subdev(
 	 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
 	 * directly from target_core_alua_tg_pt_gp_release().
 	 */
-	se_dev->t10_alua.default_tg_pt_gp = NULL;
+	dev->t10_alua.default_tg_pt_gp = NULL;
 
-	dev_cg = &se_dev->se_dev_group;
 	for (i = 0; dev_cg->default_groups[i]; i++) {
 		df_item = &dev_cg->default_groups[i]->cg_item;
 		dev_cg->default_groups[i] = NULL;
 		config_item_put(df_item);
 	}
 	/*
-	 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
-	 * from target_core_dev_item_ops->release() ->target_core_dev_release().
+	 * se_dev is released from target_core_dev_item_ops->release()
 	 */
 	config_item_put(item);
 	mutex_unlock(&hba->hba_access_mutex);
@@ -2962,13 +2674,10 @@ static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
 		return -EINVAL;
 	}
 
-	spin_lock(&hba->device_lock);
-	if (!list_empty(&hba->hba_dev_list)) {
+	if (hba->dev_count) {
 		pr_err("Unable to set hba_mode with active devices\n");
-		spin_unlock(&hba->device_lock);
 		return -EINVAL;
 	}
-	spin_unlock(&hba->device_lock);
 
 	ret = transport->pmode_enable_hba(hba, mode_flag);
 	if (ret < 0)
@@ -3120,7 +2829,7 @@ static int __init target_core_init_configfs(void)
 	 * and ALUA Logical Unit Group and Target Port Group infrastructure.
 	 */
 	target_cg = &subsys->su_group;
-	target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
 				GFP_KERNEL);
 	if (!target_cg->default_groups) {
 		pr_err("Unable to allocate target_cg->default_groups\n");
@@ -3136,7 +2845,7 @@ static int __init target_core_init_configfs(void)
 	 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
 	 */
 	hba_cg = &target_core_hbagroup;
-	hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 				GFP_KERNEL);
 	if (!hba_cg->default_groups) {
 		pr_err("Unable to allocate hba_cg->default_groups\n");
@@ -3152,7 +2861,7 @@ static int __init target_core_init_configfs(void)
 	 * groups under /sys/kernel/config/target/core/alua/
 	 */
 	alua_cg = &alua_group;
-	alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 			GFP_KERNEL);
 	if (!alua_cg->default_groups) {
 		pr_err("Unable to allocate alua_cg->default_groups\n");
@@ -3174,7 +2883,7 @@ static int __init target_core_init_configfs(void)
 	}
 
 	lu_gp_cg = &alua_lu_gps_group;
-	lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 			GFP_KERNEL);
 	if (!lu_gp_cg->default_groups) {
 		pr_err("Unable to allocate lu_gp_cg->default_groups\n");

drivers/target/target_core_device.c

@@ -4,10 +4,7 @@
  * This file contains the TCM Virtual Device and Disk Transport
  * agnostic related functions.
  *
- * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005-2006 SBE, Inc.  All Rights Reserved.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2003-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -50,26 +47,20 @@
 #include "target_core_pr.h"
 #include "target_core_ua.h"
 
-static void se_dev_start(struct se_device *dev);
-static void se_dev_stop(struct se_device *dev);
-
 static struct se_hba *lun0_hba;
-static struct se_subsystem_dev *lun0_su_dev;
 /* not static, needed by tpg.c */
 struct se_device *g_lun0_dev;
 
-int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
+sense_reason_t
+transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 {
 	struct se_lun *se_lun = NULL;
 	struct se_session *se_sess = se_cmd->se_sess;
 	struct se_device *dev;
 	unsigned long flags;
 
-	if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
-		se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
-		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		return -ENODEV;
-	}
+	if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
+		return TCM_NON_EXISTENT_LUN;
 
 	spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
 	se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
@@ -81,14 +72,12 @@ int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 
 		if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
 		    (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
-			se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
-			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
 				" Access for 0x%08x\n",
 				se_cmd->se_tfo->get_fabric_name(),
 				unpacked_lun);
 			spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
-			return -EACCES;
+			return TCM_WRITE_PROTECTED;
 		}
 
 		if (se_cmd->data_direction == DMA_TO_DEVICE)
@@ -113,38 +102,24 @@ int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 		 * MappedLUN=0 exists for this Initiator Port.
 		 */
 		if (unpacked_lun != 0) {
-			se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
-			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
 				" Access for 0x%08x\n",
 				se_cmd->se_tfo->get_fabric_name(),
 				unpacked_lun);
-			return -ENODEV;
+			return TCM_NON_EXISTENT_LUN;
 		}
 		/*
 		 * Force WRITE PROTECT for virtual LUN 0
 		 */
 		if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
-		    (se_cmd->data_direction != DMA_NONE)) {
-			se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
-			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-			return -EACCES;
-		}
+		    (se_cmd->data_direction != DMA_NONE))
+			return TCM_WRITE_PROTECTED;
 
 		se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 		se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 		se_cmd->orig_fe_lun = 0;
 		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 	}
-	/*
-	 * Determine if the struct se_lun is online.
-	 * FIXME: Check for LUN_RESET + UNIT Attention
-	 */
-	if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
-		se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
-		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		return -ENODEV;
-	}
 
 	/* Directly associate cmd with se_dev */
 	se_cmd->se_dev = se_lun->lun_se_dev;
@@ -175,11 +150,8 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 	struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 	unsigned long flags;
 
-	if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
-		se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
-		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+	if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
 		return -ENODEV;
-	}
 
 	spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
 	se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
@@ -199,15 +171,6 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 			" Access for 0x%08x\n",
 			se_cmd->se_tfo->get_fabric_name(),
 			unpacked_lun);
-		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		return -ENODEV;
-	}
-	/*
-	 * Determine if the struct se_lun is online.
-	 * FIXME: Check for LUN_RESET + UNIT Attention
-	 */
-	if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
-		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 		return -ENODEV;
 	}
 
@@ -565,7 +528,6 @@ static void core_export_port(
 	struct se_port *port,
 	struct se_lun *lun)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
 
 	spin_lock(&dev->se_port_lock);
@@ -578,7 +540,8 @@ static void core_export_port(
 	list_add_tail(&port->sep_list, &dev->dev_sep_list);
 	spin_unlock(&dev->se_port_lock);
 
-	if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+	if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
+	    !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
 		tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
 		if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
 			pr_err("Unable to allocate t10_alua_tg_pt"
@@ -587,7 +550,7 @@ static void core_export_port(
 		}
 		spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 		__core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
-			su_dev->t10_alua.default_tg_pt_gp);
+			dev->t10_alua.default_tg_pt_gp);
 		spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 		pr_debug("%s/%s: Adding to default ALUA Target Port"
 			" Group: alua/default_tg_pt_gp\n",
@@ -625,6 +588,7 @@ int core_dev_export(
 	struct se_portal_group *tpg,
 	struct se_lun *lun)
 {
+	struct se_hba *hba = dev->se_hba;
 	struct se_port *port;
 
 	port = core_alloc_port(dev);
@@ -632,9 +596,11 @@ int core_dev_export(
 		return PTR_ERR(port);
 
 	lun->lun_se_dev = dev;
-	se_dev_start(dev);
 
-	atomic_inc(&dev->dev_export_obj.obj_access_count);
+	spin_lock(&hba->device_lock);
+	dev->export_count++;
+	spin_unlock(&hba->device_lock);
+
 	core_export_port(dev, tpg, port, lun);
 	return 0;
 }
@@ -644,6 +610,7 @@ void core_dev_unexport(
 	struct se_portal_group *tpg,
 	struct se_lun *lun)
 {
+	struct se_hba *hba = dev->se_hba;
 	struct se_port *port = lun->lun_sep;
 
 	spin_lock(&lun->lun_sep_lock);
@@ -654,198 +621,27 @@ void core_dev_unexport(
 	spin_unlock(&lun->lun_sep_lock);
 
 	spin_lock(&dev->se_port_lock);
-	atomic_dec(&dev->dev_export_obj.obj_access_count);
 	core_release_port(dev, port);
 	spin_unlock(&dev->se_port_lock);
 
-	se_dev_stop(dev);
-	lun->lun_se_dev = NULL;
-}
-
-int target_report_luns(struct se_cmd *se_cmd)
-{
-	struct se_dev_entry *deve;
-	struct se_session *se_sess = se_cmd->se_sess;
-	unsigned char *buf;
-	u32 lun_count = 0, offset = 8, i;
-
-	if (se_cmd->data_length < 16) {
-		pr_warn("REPORT LUNS allocation length %u too small\n",
-			se_cmd->data_length);
-		se_cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
-	}
-
-	buf = transport_kmap_data_sg(se_cmd);
-	if (!buf)
-		return -ENOMEM;
-
-	/*
-	 * If no struct se_session pointer is present, this struct se_cmd is
-	 * coming via a target_core_mod PASSTHROUGH op, and not through
-	 * a $FABRIC_MOD.  In that case, report LUN=0 only.
-	 */
-	if (!se_sess) {
-		int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
-		lun_count = 1;
-		goto done;
-	}
-
-	spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
-	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
-		deve = se_sess->se_node_acl->device_list[i];
-		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
-			continue;
-		/*
-		 * We determine the correct LUN LIST LENGTH even once we
-		 * have reached the initial allocation length.
-		 * See SPC2-R20 7.19.
-		 */
-		lun_count++;
-		if ((offset + 8) > se_cmd->data_length)
-			continue;
-
-		int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
-		offset += 8;
-	}
-	spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
-
-	/*
-	 * See SPC3 r07, page 159.
-	 */
-done:
-	lun_count *= 8;
-	buf[0] = ((lun_count >> 24) & 0xff);
-	buf[1] = ((lun_count >> 16) & 0xff);
-	buf[2] = ((lun_count >> 8) & 0xff);
-	buf[3] = (lun_count & 0xff);
-	transport_kunmap_data_sg(se_cmd);
-
-	target_complete_cmd(se_cmd, GOOD);
-	return 0;
-}
-
-/*	se_release_device_for_hba():
- *
- *
- */
-void se_release_device_for_hba(struct se_device *dev)
-{
-	struct se_hba *hba = dev->se_hba;
-
-	if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
-	    (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
-	    (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
-	    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
-	    (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
-		se_dev_stop(dev);
-
-	if (dev->dev_ptr) {
-		destroy_workqueue(dev->tmr_wq);
-		if (dev->transport->free_device)
-			dev->transport->free_device(dev->dev_ptr);
-	}
-
 	spin_lock(&hba->device_lock);
-	list_del(&dev->dev_list);
-	hba->dev_count--;
+	dev->export_count--;
 	spin_unlock(&hba->device_lock);
 
-	core_scsi3_free_all_registrations(dev);
-	se_release_vpd_for_dev(dev);
-
-	kfree(dev);
+	lun->lun_se_dev = NULL;
 }
 
-void se_release_vpd_for_dev(struct se_device *dev)
+static void se_release_vpd_for_dev(struct se_device *dev)
 {
 	struct t10_vpd *vpd, *vpd_tmp;
 
-	spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
+	spin_lock(&dev->t10_wwn.t10_vpd_lock);
 	list_for_each_entry_safe(vpd, vpd_tmp,
-			&dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
+			&dev->t10_wwn.t10_vpd_list, vpd_list) {
 		list_del(&vpd->vpd_list);
 		kfree(vpd);
 	}
-	spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
-}
-
-/*	se_free_virtual_device():
- *
- *	Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
- */
-int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
-{
-	if (!list_empty(&dev->dev_sep_list))
-		dump_stack();
-
-	core_alua_free_lu_gp_mem(dev);
-	se_release_device_for_hba(dev);
-
-	return 0;
-}
-
-static void se_dev_start(struct se_device *dev)
-{
-	struct se_hba *hba = dev->se_hba;
-
-	spin_lock(&hba->device_lock);
-	atomic_inc(&dev->dev_obj.obj_access_count);
-	if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
-		if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
-			dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
-			dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
-		} else if (dev->dev_status &
-			   TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
-			dev->dev_status &=
-				~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
-			dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
-		}
-	}
-	spin_unlock(&hba->device_lock);
-}
-
-static void se_dev_stop(struct se_device *dev)
-{
-	struct se_hba *hba = dev->se_hba;
-
-	spin_lock(&hba->device_lock);
-	atomic_dec(&dev->dev_obj.obj_access_count);
-	if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
-		if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
-			dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
-			dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
-		} else if (dev->dev_status &
-			   TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
-			dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
-			dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
-		}
-	}
-	spin_unlock(&hba->device_lock);
-}
-
-int se_dev_check_online(struct se_device *dev)
-{
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&dev->dev_status_lock, flags);
-	ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
-	       (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
-	spin_unlock_irqrestore(&dev->dev_status_lock, flags);
-
-	return ret;
-}
-
-int se_dev_check_shutdown(struct se_device *dev)
-{
-	int ret;
-
-	spin_lock_irq(&dev->dev_status_lock);
-	ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
-	spin_unlock_irq(&dev->dev_status_lock);
-
-	return ret;
+	spin_unlock(&dev->t10_wwn.t10_vpd_lock);
 }
 
 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
@@ -866,72 +662,13 @@ static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
 	return aligned_max_sectors;
 }
 
-void se_dev_set_default_attribs(
-	struct se_device *dev,
-	struct se_dev_limits *dev_limits)
-{
-	struct queue_limits *limits = &dev_limits->limits;
-
-	dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
-	dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
-	dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
-	dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
-	dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
-	dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
-	dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
-	dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
-	dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
-	dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
-	dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
-	dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
-	dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
-	/*
-	 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
-	 * iblock_create_virtdevice() from struct queue_limits values
-	 * if blk_queue_discard()==1
-	 */
-	dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
-	dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
-		DA_MAX_UNMAP_BLOCK_DESC_COUNT;
-	dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
-	dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
-				DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
-	/*
-	 * block_size is based on subsystem plugin dependent requirements.
-	 */
-	dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
-	dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
-	/*
-	 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
-	 */
-	limits->max_hw_sectors = se_dev_align_max_sectors(limits->max_hw_sectors,
-						limits->logical_block_size);
-	dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
-
-	/*
-	 * Set fabric_max_sectors, which is reported in block limits
-	 * VPD page (B0h).
-	 */
-	dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
-	/*
-	 * Set optimal_sectors from fabric_max_sectors, which can be
-	 * lowered via configfs.
-	 */
-	dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
-	/*
-	 * queue_depth is based on subsystem plugin dependent requirements.
-	 */
-	dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
-	dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
-}
-
 int se_dev_set_max_unmap_lba_count(
 	struct se_device *dev,
 	u32 max_unmap_lba_count)
 {
-	dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
+	dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
 	pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
-			dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
+			dev, dev->dev_attrib.max_unmap_lba_count);
 	return 0;
 }
 
@@ -939,10 +676,10 @@ int se_dev_set_max_unmap_block_desc_count(
 	struct se_device *dev,
 	u32 max_unmap_block_desc_count)
 {
-	dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
+	dev->dev_attrib.max_unmap_block_desc_count =
 		max_unmap_block_desc_count;
 	pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
-			dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
+			dev, dev->dev_attrib.max_unmap_block_desc_count);
 	return 0;
 }
 
@@ -950,9 +687,9 @@ int se_dev_set_unmap_granularity(
 	struct se_device *dev,
 	u32 unmap_granularity)
 {
-	dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
+	dev->dev_attrib.unmap_granularity = unmap_granularity;
 	pr_debug("dev[%p]: Set unmap_granularity: %u\n",
-			dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
+			dev, dev->dev_attrib.unmap_granularity);
 	return 0;
 }
 
@@ -960,9 +697,19 @@ int se_dev_set_unmap_granularity_alignment(
 	struct se_device *dev,
 	u32 unmap_granularity_alignment)
 {
-	dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
+	dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
 	pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
-			dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
+			dev, dev->dev_attrib.unmap_granularity_alignment);
+	return 0;
+}
+
+int se_dev_set_max_write_same_len(
+	struct se_device *dev,
+	u32 max_write_same_len)
+{
+	dev->dev_attrib.max_write_same_len = max_write_same_len;
+	pr_debug("dev[%p]: Set max_write_same_len: %u\n",
+			dev, dev->dev_attrib.max_write_same_len);
 	return 0;
 }
 
@@ -993,9 +740,9 @@ int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
 		pr_err("emulate_fua_write not supported for pSCSI\n");
 		return -EINVAL;
 	}
-	dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
+	dev->dev_attrib.emulate_fua_write = flag;
 	pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
-			dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
+			dev, dev->dev_attrib.emulate_fua_write);
 	return 0;
 }
 
@@ -1025,9 +772,9 @@ int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
 		pr_err("emulate_write_cache not supported for pSCSI\n");
 		return -EINVAL;
 	}
-	dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
+	dev->dev_attrib.emulate_write_cache = flag;
 	pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
-			dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
+			dev, dev->dev_attrib.emulate_write_cache);
 	return 0;
 }
 
@@ -1038,16 +785,15 @@ int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
 		return -EINVAL;
 	}
 
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_err("dev[%p]: Unable to change SE Device"
-			" UA_INTRLCK_CTRL while dev_export_obj: %d count"
-			" exists\n", dev,
-			atomic_read(&dev->dev_export_obj.obj_access_count));
+			" UA_INTRLCK_CTRL while export_count is %d\n",
+			dev, dev->export_count);
 		return -EINVAL;
 	}
-	dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
+	dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
 	pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
-		dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
+		dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
 
 	return 0;
 }
@@ -1059,15 +805,15 @@ int se_dev_set_emulate_tas(struct se_device *dev, int flag)
 		return -EINVAL;
 	}
 
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_err("dev[%p]: Unable to change SE Device TAS while"
-			" dev_export_obj: %d count exists\n", dev,
-			atomic_read(&dev->dev_export_obj.obj_access_count));
+			" export_count is %d\n",
+			dev, dev->export_count);
 		return -EINVAL;
 	}
-	dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
+	dev->dev_attrib.emulate_tas = flag;
 	pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
-		dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
+		dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
 
 	return 0;
 }
@@ -1082,12 +828,12 @@ int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
 	 * We expect this value to be non-zero when generic Block Layer
 	 * Discard supported is detected iblock_create_virtdevice().
 	 */
-	if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
+	if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
 		pr_err("Generic Block Discard not supported\n");
 		return -ENOSYS;
 	}
 
-	dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
+	dev->dev_attrib.emulate_tpu = flag;
 	pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 				dev, flag);
 	return 0;
@@ -1103,12 +849,12 @@ int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
 	 * We expect this value to be non-zero when generic Block Layer
 	 * Discard supported is detected iblock_create_virtdevice().
 	 */
-	if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
+	if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
 		pr_err("Generic Block Discard not supported\n");
 		return -ENOSYS;
 	}
 
-	dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
+	dev->dev_attrib.emulate_tpws = flag;
 	pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 				dev, flag);
 	return 0;
@@ -1120,9 +866,9 @@ int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
 		pr_err("Illegal value %d\n", flag);
 		return -EINVAL;
 	}
-	dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
+	dev->dev_attrib.enforce_pr_isids = flag;
 	pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
-		(dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
+		(dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
 	return 0;
 }
 
@@ -1132,7 +878,7 @@ int se_dev_set_is_nonrot(struct se_device *dev, int flag)
 		printk(KERN_ERR "Illegal value %d\n", flag);
 		return -EINVAL;
 	}
-	dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
+	dev->dev_attrib.is_nonrot = flag;
 	pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
 	       dev, flag);
 	return 0;
@@ -1145,7 +891,7 @@ int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
 			" reordering not implemented\n", dev);
 		return -ENOSYS;
 	}
-	dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
+	dev->dev_attrib.emulate_rest_reord = flag;
 	pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
 	return 0;
 }
@@ -1155,10 +901,10 @@ int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
  */
 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
 {
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_err("dev[%p]: Unable to change SE Device TCQ while"
-			" dev_export_obj: %d count exists\n", dev,
-			atomic_read(&dev->dev_export_obj.obj_access_count));
+			" export_count is %d\n",
+			dev, dev->export_count);
 		return -EINVAL;
 	}
 	if (!queue_depth) {
@@ -1168,26 +914,26 @@ int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
 	}
 
 	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
-		if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
+		if (queue_depth > dev->dev_attrib.hw_queue_depth) {
 			pr_err("dev[%p]: Passed queue_depth: %u"
 				" exceeds TCM/SE_Device TCQ: %u\n",
 				dev, queue_depth,
-				dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
+				dev->dev_attrib.hw_queue_depth);
 			return -EINVAL;
 		}
 	} else {
-		if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
-			if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
+		if (queue_depth > dev->dev_attrib.queue_depth) {
+			if (queue_depth > dev->dev_attrib.hw_queue_depth) {
 				pr_err("dev[%p]: Passed queue_depth:"
 					" %u exceeds TCM/SE_Device MAX"
 					" TCQ: %u\n", dev, queue_depth,
-					dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
+					dev->dev_attrib.hw_queue_depth);
 				return -EINVAL;
 			}
 		}
 	}
 
-	dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
+	dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
 	pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
 			dev, queue_depth);
 	return 0;
@@ -1195,10 +941,10 @@ int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
 
 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
 {
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_err("dev[%p]: Unable to change SE Device"
-			" fabric_max_sectors while dev_export_obj: %d count exists\n",
-			dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+			" fabric_max_sectors while export_count is %d\n",
+			dev, dev->export_count);
 		return -EINVAL;
 	}
 	if (!fabric_max_sectors) {
@@ -1213,11 +959,11 @@ int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
 		return -EINVAL;
 	}
 	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
-		if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
+		if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
 			pr_err("dev[%p]: Passed fabric_max_sectors: %u"
 				" greater than TCM/SE_Device max_sectors:"
 				" %u\n", dev, fabric_max_sectors,
-				dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+				dev->dev_attrib.hw_max_sectors);
 			 return -EINVAL;
 		}
 	} else {
@@ -1233,9 +979,9 @@ int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
 	 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
 	 */
 	fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
-						      dev->se_sub_dev->se_dev_attrib.block_size);
+						      dev->dev_attrib.block_size);
 
-	dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
+	dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
 	pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
 			dev, fabric_max_sectors);
 	return 0;
@@ -1243,10 +989,10 @@ int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
 
 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
 {
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_err("dev[%p]: Unable to change SE Device"
-			" optimal_sectors while dev_export_obj: %d count exists\n",
-			dev, atomic_read(&dev->dev_export_obj.obj_access_count));
+			" optimal_sectors while export_count is %d\n",
+			dev, dev->export_count);
 		return -EINVAL;
 	}
 	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
@@ -1254,14 +1000,14 @@ int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
 				" changed for TCM/pSCSI\n", dev);
 		return -EINVAL;
 	}
-	if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
+	if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
 		pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
 			" greater than fabric_max_sectors: %u\n", dev,
-			optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
+			optimal_sectors, dev->dev_attrib.fabric_max_sectors);
 		return -EINVAL;
 	}
 
-	dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
+	dev->dev_attrib.optimal_sectors = optimal_sectors;
 	pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
 			dev, optimal_sectors);
 	return 0;
@@ -1269,10 +1015,10 @@ int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
 
 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
 {
-	if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+	if (dev->export_count) {
 		pr_err("dev[%p]: Unable to change SE Device block_size"
-			" while dev_export_obj: %d count exists\n", dev,
-			atomic_read(&dev->dev_export_obj.obj_access_count));
+			" while export_count is %d\n",
+			dev, dev->export_count);
 		return -EINVAL;
 	}
 
@@ -1293,7 +1039,7 @@ int se_dev_set_block_size(struct se_device *dev, u32 block_size)
 		return -EINVAL;
 	}
 
-	dev->se_sub_dev->se_dev_attrib.block_size = block_size;
+	dev->dev_attrib.block_size = block_size;
 	pr_debug("dev[%p]: SE Device block_size changed to %u\n",
 			dev, block_size);
 	return 0;
@@ -1307,12 +1053,6 @@ struct se_lun *core_dev_add_lun(
 	struct se_lun *lun_p;
 	int rc;
 
-	if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
-		pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
-			atomic_read(&dev->dev_access_obj.obj_access_count));
-		return ERR_PTR(-EACCES);
-	}
-
 	lun_p = core_tpg_pre_addlun(tpg, lun);
 	if (IS_ERR(lun_p))
 		return lun_p;
@@ -1568,12 +1308,211 @@ void core_dev_free_initiator_node_lun_acl(
 	kfree(lacl);
 }
 
+static void scsi_dump_inquiry(struct se_device *dev)
+{
+	struct t10_wwn *wwn = &dev->t10_wwn;
+	char buf[17];
+	int i, device_type;
+	/*
+	 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
+	 */
+	for (i = 0; i < 8; i++)
+		if (wwn->vendor[i] >= 0x20)
+			buf[i] = wwn->vendor[i];
+		else
+			buf[i] = ' ';
+	buf[i] = '\0';
+	pr_debug("  Vendor: %s\n", buf);
+
+	for (i = 0; i < 16; i++)
+		if (wwn->model[i] >= 0x20)
+			buf[i] = wwn->model[i];
+		else
+			buf[i] = ' ';
+	buf[i] = '\0';
+	pr_debug("  Model: %s\n", buf);
+
+	for (i = 0; i < 4; i++)
+		if (wwn->revision[i] >= 0x20)
+			buf[i] = wwn->revision[i];
+		else
+			buf[i] = ' ';
+	buf[i] = '\0';
+	pr_debug("  Revision: %s\n", buf);
+
+	device_type = dev->transport->get_device_type(dev);
+	pr_debug("  Type:   %s ", scsi_device_type(device_type));
+}
+
+struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
+{
+	struct se_device *dev;
+
+	dev = hba->transport->alloc_device(hba, name);
+	if (!dev)
+		return NULL;
+
+	dev->dev_link_magic = SE_DEV_LINK_MAGIC;
+	dev->se_hba = hba;
+	dev->transport = hba->transport;
+
+	INIT_LIST_HEAD(&dev->dev_list);
+	INIT_LIST_HEAD(&dev->dev_sep_list);
+	INIT_LIST_HEAD(&dev->dev_tmr_list);
+	INIT_LIST_HEAD(&dev->delayed_cmd_list);
+	INIT_LIST_HEAD(&dev->state_list);
+	INIT_LIST_HEAD(&dev->qf_cmd_list);
+	spin_lock_init(&dev->stats_lock);
+	spin_lock_init(&dev->execute_task_lock);
+	spin_lock_init(&dev->delayed_cmd_lock);
+	spin_lock_init(&dev->dev_reservation_lock);
+	spin_lock_init(&dev->se_port_lock);
+	spin_lock_init(&dev->se_tmr_lock);
+	spin_lock_init(&dev->qf_cmd_lock);
+	atomic_set(&dev->dev_ordered_id, 0);
+	INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
+	spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
+	INIT_LIST_HEAD(&dev->t10_pr.registration_list);
+	INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
+	spin_lock_init(&dev->t10_pr.registration_lock);
+	spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
+	INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
+	spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
+
+	dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+	dev->t10_wwn.t10_dev = dev;
+	dev->t10_alua.t10_dev = dev;
+
+	dev->dev_attrib.da_dev = dev;
+	dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
+	dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
+	dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
+	dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
+	dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
+	dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
+	dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
+	dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
+	dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
+	dev->dev_attrib.is_nonrot = DA_IS_NONROT;
+	dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
+	dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
+	dev->dev_attrib.max_unmap_block_desc_count =
+		DA_MAX_UNMAP_BLOCK_DESC_COUNT;
+	dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
+	dev->dev_attrib.unmap_granularity_alignment =
+				DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
+	dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
+	dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
+	dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
+
+	return dev;
+}
+
+int target_configure_device(struct se_device *dev)
+{
+	struct se_hba *hba = dev->se_hba;
+	int ret;
+
+	if (dev->dev_flags & DF_CONFIGURED) {
+		pr_err("se_dev->se_dev_ptr already set for storage"
+				" object\n");
+		return -EEXIST;
+	}
+
+	ret = dev->transport->configure_device(dev);
+	if (ret)
+		goto out;
+	dev->dev_flags |= DF_CONFIGURED;
+
+	/*
+	 * XXX: there is not much point to have two different values here..
+	 */
+	dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
+	dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
+
+	/*
+	 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
+	 */
+	dev->dev_attrib.hw_max_sectors =
+		se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
+					 dev->dev_attrib.hw_block_size);
+
+	dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
+	dev->creation_time = get_jiffies_64();
+
+	ret = core_setup_alua(dev);
+	if (ret)
+		goto out;
+
+	/*
+	 * Startup the struct se_device processing thread
+	 */
+	dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
+				      dev->transport->name);
+	if (!dev->tmr_wq) {
+		pr_err("Unable to create tmr workqueue for %s\n",
+			dev->transport->name);
+		ret = -ENOMEM;
+		goto out_free_alua;
+	}
+
+	/*
+	 * Setup work_queue for QUEUE_FULL
+	 */
+	INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
+
+	/*
+	 * Preload the initial INQUIRY const values if we are doing
+	 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
+	 * passthrough because this is being provided by the backend LLD.
+	 */
+	if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
+		strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
+		strncpy(&dev->t10_wwn.model[0],
+			dev->transport->inquiry_prod, 16);
+		strncpy(&dev->t10_wwn.revision[0],
+			dev->transport->inquiry_rev, 4);
+	}
+
+	scsi_dump_inquiry(dev);
+
+	spin_lock(&hba->device_lock);
+	hba->dev_count++;
+	spin_unlock(&hba->device_lock);
+	return 0;
+
+out_free_alua:
+	core_alua_free_lu_gp_mem(dev);
+out:
+	se_release_vpd_for_dev(dev);
+	return ret;
+}
+
+void target_free_device(struct se_device *dev)
+{
+	struct se_hba *hba = dev->se_hba;
+
+	WARN_ON(!list_empty(&dev->dev_sep_list));
+
+	if (dev->dev_flags & DF_CONFIGURED) {
+		destroy_workqueue(dev->tmr_wq);
+
+		spin_lock(&hba->device_lock);
+		hba->dev_count--;
+		spin_unlock(&hba->device_lock);
+	}
+
+	core_alua_free_lu_gp_mem(dev);
+	core_scsi3_free_all_registrations(dev);
+	se_release_vpd_for_dev(dev);
+
+	dev->transport->free_device(dev);
+}
+
 int core_dev_setup_virtual_lun0(void)
 {
 	struct se_hba *hba;
 	struct se_device *dev;
-	struct se_subsystem_dev *se_dev = NULL;
-	struct se_subsystem_api *t;
 	char buf[16];
 	int ret;
 
@@ -1581,60 +1520,28 @@ int core_dev_setup_virtual_lun0(void)
 	if (IS_ERR(hba))
 		return PTR_ERR(hba);
 
-	lun0_hba = hba;
-	t = hba->transport;
-
-	se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
-	if (!se_dev) {
-		pr_err("Unable to allocate memory for"
-				" struct se_subsystem_dev\n");
+	dev = target_alloc_device(hba, "virt_lun0");
+	if (!dev) {
 		ret = -ENOMEM;
-		goto out;
+		goto out_free_hba;
 	}
-	INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
-	spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
-	INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
-	INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
-	spin_lock_init(&se_dev->t10_pr.registration_lock);
-	spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
-	INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
-	spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
-	spin_lock_init(&se_dev->se_dev_lock);
-	se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
-	se_dev->t10_wwn.t10_sub_dev = se_dev;
-	se_dev->t10_alua.t10_sub_dev = se_dev;
-	se_dev->se_dev_attrib.da_sub_dev = se_dev;
-	se_dev->se_dev_hba = hba;
-
-	se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
-	if (!se_dev->se_dev_su_ptr) {
-		pr_err("Unable to locate subsystem dependent pointer"
-			" from allocate_virtdevice()\n");
-		ret = -ENOMEM;
-		goto out;
-	}
-	lun0_su_dev = se_dev;
 
 	memset(buf, 0, 16);
 	sprintf(buf, "rd_pages=8");
-	t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
+	hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
 
-	dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
-	if (IS_ERR(dev)) {
-		ret = PTR_ERR(dev);
-		goto out;
-	}
-	se_dev->se_dev_ptr = dev;
-	g_lun0_dev = dev;
+	ret = target_configure_device(dev);
+	if (ret)
+		goto out_free_se_dev;
 
+	lun0_hba = hba;
+	g_lun0_dev = dev;
 	return 0;
-out:
-	lun0_su_dev = NULL;
-	kfree(se_dev);
-	if (lun0_hba) {
-		core_delete_hba(lun0_hba);
-		lun0_hba = NULL;
-	}
+
+out_free_se_dev:
+	target_free_device(dev);
+out_free_hba:
+	core_delete_hba(hba);
 	return ret;
 }
 
@@ -1642,14 +1549,11 @@ out:
 void core_dev_release_virtual_lun0(void)
 {
 	struct se_hba *hba = lun0_hba;
-	struct se_subsystem_dev *su_dev = lun0_su_dev;
 
 	if (!hba)
 		return;
 
 	if (g_lun0_dev)
-		se_free_virtual_device(g_lun0_dev, hba);
-
-	kfree(su_dev);
+		target_free_device(g_lun0_dev);
 	core_delete_hba(hba);
 }

drivers/target/target_core_fabric_configfs.c

@@ -4,10 +4,9 @@
  * This file contains generic fabric module configfs infrastructure for
  * TCM v4.x code
  *
- * Copyright (c) 2010,2011 Rising Tide Systems
- * Copyright (c) 2010,2011 Linux-iSCSI.org
+ * (c) Copyright 2010-2012 RisingTide Systems LLC.
  *
- * Copyright (c) Nicholas A. Bellinger <nab@linux-iscsi.org>
+ * Nicholas A. Bellinger <nab@linux-iscsi.org>
 *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -71,6 +70,12 @@ static int target_fabric_mappedlun_link(
 	struct se_portal_group *se_tpg;
 	struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
 	int ret = 0, lun_access;
+
+	if (lun->lun_link_magic != SE_LUN_LINK_MAGIC) {
+		pr_err("Bad lun->lun_link_magic, not a valid lun_ci pointer:"
+			" %p to struct lun: %p\n", lun_ci, lun);
+		return -EFAULT;
+	}
 	/*
 	 * Ensure that the source port exists
 	 */
@@ -358,7 +363,7 @@ static struct config_group *target_fabric_make_mappedlun(
 	}
 
 	lacl_cg = &lacl->se_lun_group;
-	lacl_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	lacl_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 				GFP_KERNEL);
 	if (!lacl_cg->default_groups) {
 		pr_err("Unable to allocate lacl_cg->default_groups\n");
@@ -374,7 +379,7 @@ static struct config_group *target_fabric_make_mappedlun(
 	lacl_cg->default_groups[1] = NULL;
 
 	ml_stat_grp = &lacl->ml_stat_grps.stat_group;
-	ml_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
+	ml_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 3,
 				GFP_KERNEL);
 	if (!ml_stat_grp->default_groups) {
 		pr_err("Unable to allocate ml_stat_grp->default_groups\n");
@@ -734,17 +739,21 @@ static int target_fabric_port_link(
 	struct config_item *se_dev_ci)
 {
 	struct config_item *tpg_ci;
-	struct se_device *dev;
 	struct se_lun *lun = container_of(to_config_group(lun_ci),
 				struct se_lun, lun_group);
 	struct se_lun *lun_p;
 	struct se_portal_group *se_tpg;
-	struct se_subsystem_dev *se_dev = container_of(
-				to_config_group(se_dev_ci), struct se_subsystem_dev,
-				se_dev_group);
+	struct se_device *dev =
+		container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
 	struct target_fabric_configfs *tf;
 	int ret;
 
+	if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
+		pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
+			" %p to struct se_device: %p\n", se_dev_ci, dev);
+		return -EFAULT;
+	}
+
 	tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
 	se_tpg = container_of(to_config_group(tpg_ci),
 				struct se_portal_group, tpg_group);
@@ -755,14 +764,6 @@ static int target_fabric_port_link(
 		return -EEXIST;
 	}
 
-	dev = se_dev->se_dev_ptr;
-	if (!dev) {
-		pr_err("Unable to locate struct se_device pointer from"
-			" %s\n", config_item_name(se_dev_ci));
-		ret = -ENODEV;
-		goto out;
-	}
-
 	lun_p = core_dev_add_lun(se_tpg, dev, lun->unpacked_lun);
 	if (IS_ERR(lun_p)) {
 		pr_err("core_dev_add_lun() failed\n");
@@ -869,7 +870,7 @@ static struct config_group *target_fabric_make_lun(
 		return ERR_PTR(-EINVAL);
 
 	lun_cg = &lun->lun_group;
-	lun_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+	lun_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
 				GFP_KERNEL);
 	if (!lun_cg->default_groups) {
 		pr_err("Unable to allocate lun_cg->default_groups\n");

drivers/target/target_core_fabric_lib.c

@@ -4,8 +4,7 @@
  * This file contains generic high level protocol identifier and PR
  * handlers for TCM fabric modules
  *
- * Copyright (c) 2010 Rising Tide Systems, Inc.
- * Copyright (c) 2010 Linux-iSCSI.org
+ * (c) Copyright 2010-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@linux-iscsi.org>
  *

drivers/target/target_core_file.c

@@ -3,10 +3,7 @@
  *
  * This file contains the Storage Engine <-> FILEIO transport specific functions
  *
- * Copyright (c) 2005 PyX Technologies, Inc.
- * Copyright (c) 2005-2006 SBE, Inc.  All Rights Reserved.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2005-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -41,7 +38,10 @@
 
 #include "target_core_file.h"
 
-static struct se_subsystem_api fileio_template;
+static inline struct fd_dev *FD_DEV(struct se_device *dev)
+{
+	return container_of(dev, struct fd_dev, dev);
+}
 
 /*	fd_attach_hba(): (Part of se_subsystem_api_t template)
  *
@@ -82,7 +82,7 @@ static void fd_detach_hba(struct se_hba *hba)
 	hba->hba_ptr = NULL;
 }
 
-static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name)
+static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name)
 {
 	struct fd_dev *fd_dev;
 	struct fd_host *fd_host = hba->hba_ptr;
@@ -97,34 +97,28 @@ static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name)
 
 	pr_debug("FILEIO: Allocated fd_dev for %p\n", name);
 
-	return fd_dev;
+	return &fd_dev->dev;
 }
 
-/*	fd_create_virtdevice(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static struct se_device *fd_create_virtdevice(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	void *p)
+static int fd_configure_device(struct se_device *dev)
 {
-	struct se_device *dev;
-	struct se_dev_limits dev_limits;
-	struct queue_limits *limits;
-	struct fd_dev *fd_dev = p;
-	struct fd_host *fd_host = hba->hba_ptr;
+	struct fd_dev *fd_dev = FD_DEV(dev);
+	struct fd_host *fd_host = dev->se_hba->hba_ptr;
 	struct file *file;
 	struct inode *inode = NULL;
-	int dev_flags = 0, flags, ret = -EINVAL;
+	int flags, ret = -EINVAL;
 
-	memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+	if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) {
+		pr_err("Missing fd_dev_name=\n");
+		return -EINVAL;
+	}
 
 	/*
 	 * Use O_DSYNC by default instead of O_SYNC to forgo syncing
 	 * of pure timestamp updates.
 	 */
 	flags = O_RDWR | O_CREAT | O_LARGEFILE | O_DSYNC;
+
 	/*
 	 * Optionally allow fd_buffered_io=1 to be enabled for people
 	 * who want use the fs buffer cache as an WriteCache mechanism.
@@ -154,22 +148,17 @@ static struct se_device *fd_create_virtdevice(
 	 */
 	inode = file->f_mapping->host;
 	if (S_ISBLK(inode->i_mode)) {
-		struct request_queue *q;
+		struct request_queue *q = bdev_get_queue(inode->i_bdev);
 		unsigned long long dev_size;
-		/*
-		 * Setup the local scope queue_limits from struct request_queue->limits
-		 * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
-		 */
-		q = bdev_get_queue(inode->i_bdev);
-		limits = &dev_limits.limits;
-		limits->logical_block_size = bdev_logical_block_size(inode->i_bdev);
-		limits->max_hw_sectors = queue_max_hw_sectors(q);
-		limits->max_sectors = queue_max_sectors(q);
+
+		dev->dev_attrib.hw_block_size =
+			bdev_logical_block_size(inode->i_bdev);
+		dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q);
+
 		/*
 		 * Determine the number of bytes from i_size_read() minus
 		 * one (1) logical sector from underlying struct block_device
 		 */
-		fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
 		dev_size = (i_size_read(file->f_mapping->host) -
 				       fd_dev->fd_block_size);
 
@@ -185,26 +174,18 @@ static struct se_device *fd_create_virtdevice(
 			goto fail;
 		}
 
-		limits = &dev_limits.limits;
-		limits->logical_block_size = FD_BLOCKSIZE;
-		limits->max_hw_sectors = FD_MAX_SECTORS;
-		limits->max_sectors = FD_MAX_SECTORS;
-		fd_dev->fd_block_size = FD_BLOCKSIZE;
+		dev->dev_attrib.hw_block_size = FD_BLOCKSIZE;
+		dev->dev_attrib.hw_max_sectors = FD_MAX_SECTORS;
 	}
 
-	dev_limits.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
-	dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH;
+	fd_dev->fd_block_size = dev->dev_attrib.hw_block_size;
 
-	dev = transport_add_device_to_core_hba(hba, &fileio_template,
-				se_dev, dev_flags, fd_dev,
-				&dev_limits, "FILEIO", FD_VERSION);
-	if (!dev)
-		goto fail;
+	dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
 
 	if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) {
 		pr_debug("FILEIO: Forcing setting of emulate_write_cache=1"
 			" with FDBD_HAS_BUFFERED_IO_WCE\n");
-		dev->se_sub_dev->se_dev_attrib.emulate_write_cache = 1;
+		dev->dev_attrib.emulate_write_cache = 1;
 	}
 
 	fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++;
@@ -214,22 +195,18 @@ static struct se_device *fd_create_virtdevice(
 		" %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id,
 			fd_dev->fd_dev_name, fd_dev->fd_dev_size);
 
-	return dev;
+	return 0;
 fail:
 	if (fd_dev->fd_file) {
 		filp_close(fd_dev->fd_file, NULL);
 		fd_dev->fd_file = NULL;
 	}
-	return ERR_PTR(ret);
+	return ret;
 }
 
-/*	fd_free_device(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static void fd_free_device(void *p)
+static void fd_free_device(struct se_device *dev)
 {
-	struct fd_dev *fd_dev = p;
+	struct fd_dev *fd_dev = FD_DEV(dev);
 
 	if (fd_dev->fd_file) {
 		filp_close(fd_dev->fd_file, NULL);
@@ -239,17 +216,16 @@ static void fd_free_device(void *p)
 	kfree(fd_dev);
 }
 
-static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl,
-		u32 sgl_nents)
+static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl,
+		u32 sgl_nents, int is_write)
 {
 	struct se_device *se_dev = cmd->se_dev;
-	struct fd_dev *dev = se_dev->dev_ptr;
+	struct fd_dev *dev = FD_DEV(se_dev);
 	struct file *fd = dev->fd_file;
 	struct scatterlist *sg;
 	struct iovec *iov;
 	mm_segment_t old_fs;
-	loff_t pos = (cmd->t_task_lba *
-		      se_dev->se_sub_dev->se_dev_attrib.block_size);
+	loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size);
 	int ret = 0, i;
 
 	iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL);
@@ -260,81 +236,58 @@ static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl,
 
 	for_each_sg(sgl, sg, sgl_nents, i) {
 		iov[i].iov_len = sg->length;
-		iov[i].iov_base = sg_virt(sg);
+		iov[i].iov_base = kmap(sg_page(sg)) + sg->offset;
 	}
 
 	old_fs = get_fs();
 	set_fs(get_ds());
-	ret = vfs_readv(fd, &iov[0], sgl_nents, &pos);
+
+	if (is_write)
+		ret = vfs_writev(fd, &iov[0], sgl_nents, &pos);
+	else
+		ret = vfs_readv(fd, &iov[0], sgl_nents, &pos);
+
 	set_fs(old_fs);
 
+	for_each_sg(sgl, sg, sgl_nents, i)
+		kunmap(sg_page(sg));
+
 	kfree(iov);
-	/*
-	 * Return zeros and GOOD status even if the READ did not return
-	 * the expected virt_size for struct file w/o a backing struct
-	 * block_device.
-	 */
-	if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
+
+	if (is_write) {
 		if (ret < 0 || ret != cmd->data_length) {
-			pr_err("vfs_readv() returned %d,"
-				" expecting %d for S_ISBLK\n", ret,
-				(int)cmd->data_length);
+			pr_err("%s() write returned %d\n", __func__, ret);
 			return (ret < 0 ? ret : -EINVAL);
 		}
 	} else {
-		if (ret < 0) {
-			pr_err("vfs_readv() returned %d for non"
-				" S_ISBLK\n", ret);
-			return ret;
+		/*
+		 * Return zeros and GOOD status even if the READ did not return
+		 * the expected virt_size for struct file w/o a backing struct
+		 * block_device.
+		 */
+		if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
+			if (ret < 0 || ret != cmd->data_length) {
+				pr_err("%s() returned %d, expecting %u for "
+						"S_ISBLK\n", __func__, ret,
+						cmd->data_length);
+				return (ret < 0 ? ret : -EINVAL);
+			}
+		} else {
+			if (ret < 0) {
+				pr_err("%s() returned %d for non S_ISBLK\n",
+						__func__, ret);
+				return ret;
+			}
 		}
 	}
-
-	return 1;
-}
-
-static int fd_do_writev(struct se_cmd *cmd, struct scatterlist *sgl,
-		u32 sgl_nents)
-{
-	struct se_device *se_dev = cmd->se_dev;
-	struct fd_dev *dev = se_dev->dev_ptr;
-	struct file *fd = dev->fd_file;
-	struct scatterlist *sg;
-	struct iovec *iov;
-	mm_segment_t old_fs;
-	loff_t pos = (cmd->t_task_lba *
-		      se_dev->se_sub_dev->se_dev_attrib.block_size);
-	int ret, i = 0;
-
-	iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL);
-	if (!iov) {
-		pr_err("Unable to allocate fd_do_writev iov[]\n");
-		return -ENOMEM;
-	}
-
-	for_each_sg(sgl, sg, sgl_nents, i) {
-		iov[i].iov_len = sg->length;
-		iov[i].iov_base = sg_virt(sg);
-	}
-
-	old_fs = get_fs();
-	set_fs(get_ds());
-	ret = vfs_writev(fd, &iov[0], sgl_nents, &pos);
-	set_fs(old_fs);
-
-	kfree(iov);
-
-	if (ret < 0 || ret != cmd->data_length) {
-		pr_err("vfs_writev() returned %d\n", ret);
-		return (ret < 0 ? ret : -EINVAL);
-	}
-
 	return 1;
 }
 
-static int fd_execute_sync_cache(struct se_cmd *cmd)
+static sense_reason_t
+fd_execute_sync_cache(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
-	struct fd_dev *fd_dev = dev->dev_ptr;
+	struct fd_dev *fd_dev = FD_DEV(dev);
 	int immed = (cmd->t_task_cdb[1] & 0x2);
 	loff_t start, end;
 	int ret;
@@ -353,7 +306,7 @@ static int fd_execute_sync_cache(struct se_cmd *cmd)
 		start = 0;
 		end = LLONG_MAX;
 	} else {
-		start = cmd->t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
+		start = cmd->t_task_lba * dev->dev_attrib.block_size;
 		if (cmd->data_length)
 			end = start + cmd->data_length;
 		else
@@ -367,17 +320,16 @@ static int fd_execute_sync_cache(struct se_cmd *cmd)
 	if (immed)
 		return 0;
 
-	if (ret) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	if (ret)
 		target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
-	} else {
+	else
 		target_complete_cmd(cmd, SAM_STAT_GOOD);
-	}
 
 	return 0;
 }
 
-static int fd_execute_rw(struct se_cmd *cmd)
+static sense_reason_t
+fd_execute_rw(struct se_cmd *cmd)
 {
 	struct scatterlist *sgl = cmd->t_data_sg;
 	u32 sgl_nents = cmd->t_data_nents;
@@ -390,30 +342,29 @@ static int fd_execute_rw(struct se_cmd *cmd)
 	 * physical memory addresses to struct iovec virtual memory.
 	 */
 	if (data_direction == DMA_FROM_DEVICE) {
-		ret = fd_do_readv(cmd, sgl, sgl_nents);
+		ret = fd_do_rw(cmd, sgl, sgl_nents, 0);
 	} else {
-		ret = fd_do_writev(cmd, sgl, sgl_nents);
+		ret = fd_do_rw(cmd, sgl, sgl_nents, 1);
 		/*
 		 * Perform implict vfs_fsync_range() for fd_do_writev() ops
 		 * for SCSI WRITEs with Forced Unit Access (FUA) set.
 		 * Allow this to happen independent of WCE=0 setting.
 		 */
 		if (ret > 0 &&
-		    dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
+		    dev->dev_attrib.emulate_fua_write > 0 &&
 		    (cmd->se_cmd_flags & SCF_FUA)) {
-			struct fd_dev *fd_dev = dev->dev_ptr;
+			struct fd_dev *fd_dev = FD_DEV(dev);
 			loff_t start = cmd->t_task_lba *
-				dev->se_sub_dev->se_dev_attrib.block_size;
+				dev->dev_attrib.block_size;
 			loff_t end = start + cmd->data_length;
 
 			vfs_fsync_range(fd_dev->fd_file, start, end, 1);
 		}
 	}
 
-	if (ret < 0) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return ret;
-	}
+	if (ret < 0)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
 	if (ret)
 		target_complete_cmd(cmd, SAM_STAT_GOOD);
 	return 0;
@@ -430,12 +381,10 @@ static match_table_t tokens = {
 	{Opt_err, NULL}
 };
 
-static ssize_t fd_set_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	const char *page, ssize_t count)
+static ssize_t fd_set_configfs_dev_params(struct se_device *dev,
+		const char *page, ssize_t count)
 {
-	struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+	struct fd_dev *fd_dev = FD_DEV(dev);
 	char *orig, *ptr, *arg_p, *opts;
 	substring_t args[MAX_OPT_ARGS];
 	int ret = 0, arg, token;
@@ -502,24 +451,9 @@ out:
 	return (!ret) ? count : ret;
 }
 
-static ssize_t fd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
+static ssize_t fd_show_configfs_dev_params(struct se_device *dev, char *b)
 {
-	struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
-
-	if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) {
-		pr_err("Missing fd_dev_name=\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static ssize_t fd_show_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	char *b)
-{
-	struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
+	struct fd_dev *fd_dev = FD_DEV(dev);
 	ssize_t bl = 0;
 
 	bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id);
@@ -530,27 +464,9 @@ static ssize_t fd_show_configfs_dev_params(
 	return bl;
 }
 
-/*	fd_get_device_rev(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static u32 fd_get_device_rev(struct se_device *dev)
-{
-	return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
-}
-
-/*	fd_get_device_type(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static u32 fd_get_device_type(struct se_device *dev)
-{
-	return TYPE_DISK;
-}
-
 static sector_t fd_get_blocks(struct se_device *dev)
 {
-	struct fd_dev *fd_dev = dev->dev_ptr;
+	struct fd_dev *fd_dev = FD_DEV(dev);
 	struct file *f = fd_dev->fd_file;
 	struct inode *i = f->f_mapping->host;
 	unsigned long long dev_size;
@@ -564,34 +480,35 @@ static sector_t fd_get_blocks(struct se_device *dev)
 	else
 		dev_size = fd_dev->fd_dev_size;
 
-	return div_u64(dev_size, dev->se_sub_dev->se_dev_attrib.block_size);
+	return div_u64(dev_size, dev->dev_attrib.block_size);
 }
 
-static struct spc_ops fd_spc_ops = {
+static struct sbc_ops fd_sbc_ops = {
 	.execute_rw		= fd_execute_rw,
 	.execute_sync_cache	= fd_execute_sync_cache,
 };
 
-static int fd_parse_cdb(struct se_cmd *cmd)
+static sense_reason_t
+fd_parse_cdb(struct se_cmd *cmd)
 {
-	return sbc_parse_cdb(cmd, &fd_spc_ops);
+	return sbc_parse_cdb(cmd, &fd_sbc_ops);
 }
 
 static struct se_subsystem_api fileio_template = {
 	.name			= "fileio",
+	.inquiry_prod		= "FILEIO",
+	.inquiry_rev		= FD_VERSION,
 	.owner			= THIS_MODULE,
 	.transport_type		= TRANSPORT_PLUGIN_VHBA_PDEV,
 	.attach_hba		= fd_attach_hba,
 	.detach_hba		= fd_detach_hba,
-	.allocate_virtdevice	= fd_allocate_virtdevice,
-	.create_virtdevice	= fd_create_virtdevice,
+	.alloc_device		= fd_alloc_device,
+	.configure_device	= fd_configure_device,
 	.free_device		= fd_free_device,
 	.parse_cdb		= fd_parse_cdb,
-	.check_configfs_dev_params = fd_check_configfs_dev_params,
 	.set_configfs_dev_params = fd_set_configfs_dev_params,
 	.show_configfs_dev_params = fd_show_configfs_dev_params,
-	.get_device_rev		= fd_get_device_rev,
-	.get_device_type	= fd_get_device_type,
+	.get_device_type	= sbc_get_device_type,
 	.get_blocks		= fd_get_blocks,
 };
 

drivers/target/target_core_file.h

@@ -17,6 +17,8 @@
 #define FDBD_HAS_BUFFERED_IO_WCE 0x04
 
 struct fd_dev {
+	struct se_device dev;
+
 	u32		fbd_flags;
 	unsigned char	fd_dev_name[FD_MAX_DEV_NAME];
 	/* Unique Ramdisk Device ID in Ramdisk HBA */

drivers/target/target_core_hba.c

@@ -3,10 +3,7 @@
  *
  * This file contains the TCM HBA Transport related functions.
  *
- * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2003-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -113,7 +110,6 @@ core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
 		return ERR_PTR(-ENOMEM);
 	}
 
-	INIT_LIST_HEAD(&hba->hba_dev_list);
 	spin_lock_init(&hba->device_lock);
 	mutex_init(&hba->hba_access_mutex);
 
@@ -152,8 +148,7 @@ out_free_hba:
 int
 core_delete_hba(struct se_hba *hba)
 {
-	if (!list_empty(&hba->hba_dev_list))
-		dump_stack();
+	WARN_ON(hba->dev_count);
 
 	hba->transport->detach_hba(hba);
 

drivers/target/target_core_iblock.c

@@ -4,10 +4,7 @@
  * This file contains the Storage Engine  <-> Linux BlockIO transport
  * specific functions.
  *
- * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2003-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -50,9 +47,13 @@
 #define IBLOCK_MAX_BIO_PER_TASK	 32	/* max # of bios to submit at a time */
 #define IBLOCK_BIO_POOL_SIZE	128
 
-static struct se_subsystem_api iblock_template;
+static inline struct iblock_dev *IBLOCK_DEV(struct se_device *dev)
+{
+	return container_of(dev, struct iblock_dev, dev);
+}
+
 
-static void iblock_bio_done(struct bio *, int);
+static struct se_subsystem_api iblock_template;
 
 /*	iblock_attach_hba(): (Part of se_subsystem_api_t template)
  *
@@ -70,7 +71,7 @@ static void iblock_detach_hba(struct se_hba *hba)
 {
 }
 
-static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name)
+static struct se_device *iblock_alloc_device(struct se_hba *hba, const char *name)
 {
 	struct iblock_dev *ib_dev = NULL;
 
@@ -82,40 +83,28 @@ static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name)
 
 	pr_debug( "IBLOCK: Allocated ib_dev for %s\n", name);
 
-	return ib_dev;
+	return &ib_dev->dev;
 }
 
-static struct se_device *iblock_create_virtdevice(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	void *p)
+static int iblock_configure_device(struct se_device *dev)
 {
-	struct iblock_dev *ib_dev = p;
-	struct se_device *dev;
-	struct se_dev_limits dev_limits;
-	struct block_device *bd = NULL;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
 	struct request_queue *q;
-	struct queue_limits *limits;
-	u32 dev_flags = 0;
+	struct block_device *bd = NULL;
 	fmode_t mode;
-	int ret = -EINVAL;
+	int ret = -ENOMEM;
 
-	if (!ib_dev) {
-		pr_err("Unable to locate struct iblock_dev parameter\n");
-		return ERR_PTR(ret);
+	if (!(ib_dev->ibd_flags & IBDF_HAS_UDEV_PATH)) {
+		pr_err("Missing udev_path= parameters for IBLOCK\n");
+		return -EINVAL;
 	}
-	memset(&dev_limits, 0, sizeof(struct se_dev_limits));
 
 	ib_dev->ibd_bio_set = bioset_create(IBLOCK_BIO_POOL_SIZE, 0);
 	if (!ib_dev->ibd_bio_set) {
-		pr_err("IBLOCK: Unable to create bioset()\n");
-		return ERR_PTR(-ENOMEM);
+		pr_err("IBLOCK: Unable to create bioset\n");
+		goto out;
 	}
-	pr_debug("IBLOCK: Created bio_set()\n");
-	/*
-	 * iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path
-	 * must already have been set in order for echo 1 > $HBA/$DEV/enable to run.
-	 */
+
 	pr_debug( "IBLOCK: Claiming struct block_device: %s\n",
 			ib_dev->ibd_udev_path);
 
@@ -126,27 +115,15 @@ static struct se_device *iblock_create_virtdevice(
 	bd = blkdev_get_by_path(ib_dev->ibd_udev_path, mode, ib_dev);
 	if (IS_ERR(bd)) {
 		ret = PTR_ERR(bd);
-		goto failed;
+		goto out_free_bioset;
 	}
-	/*
-	 * Setup the local scope queue_limits from struct request_queue->limits
-	 * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
-	 */
-	q = bdev_get_queue(bd);
-	limits = &dev_limits.limits;
-	limits->logical_block_size = bdev_logical_block_size(bd);
-	limits->max_hw_sectors = UINT_MAX;
-	limits->max_sectors = UINT_MAX;
-	dev_limits.hw_queue_depth = q->nr_requests;
-	dev_limits.queue_depth = q->nr_requests;
-
 	ib_dev->ibd_bd = bd;
 
-	dev = transport_add_device_to_core_hba(hba,
-			&iblock_template, se_dev, dev_flags, ib_dev,
-			&dev_limits, "IBLOCK", IBLOCK_VERSION);
-	if (!dev)
-		goto failed;
+	q = bdev_get_queue(bd);
+
+	dev->dev_attrib.hw_block_size = bdev_logical_block_size(bd);
+	dev->dev_attrib.hw_max_sectors = UINT_MAX;
+	dev->dev_attrib.hw_queue_depth = q->nr_requests;
 
 	/*
 	 * Check if the underlying struct block_device request_queue supports
@@ -154,38 +131,41 @@ static struct se_device *iblock_create_virtdevice(
 	 * in ATA and we need to set TPE=1
 	 */
 	if (blk_queue_discard(q)) {
-		dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count =
+		dev->dev_attrib.max_unmap_lba_count =
 				q->limits.max_discard_sectors;
+
 		/*
 		 * Currently hardcoded to 1 in Linux/SCSI code..
 		 */
-		dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 1;
-		dev->se_sub_dev->se_dev_attrib.unmap_granularity =
+		dev->dev_attrib.max_unmap_block_desc_count = 1;
+		dev->dev_attrib.unmap_granularity =
 				q->limits.discard_granularity >> 9;
-		dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
+		dev->dev_attrib.unmap_granularity_alignment =
 				q->limits.discard_alignment;
 
 		pr_debug("IBLOCK: BLOCK Discard support available,"
 				" disabled by default\n");
 	}
+	/*
+	 * Enable write same emulation for IBLOCK and use 0xFFFF as
+	 * the smaller WRITE_SAME(10) only has a two-byte block count.
+	 */
+	dev->dev_attrib.max_write_same_len = 0xFFFF;
 
 	if (blk_queue_nonrot(q))
-		dev->se_sub_dev->se_dev_attrib.is_nonrot = 1;
-
-	return dev;
+		dev->dev_attrib.is_nonrot = 1;
+	return 0;
 
-failed:
-	if (ib_dev->ibd_bio_set) {
-		bioset_free(ib_dev->ibd_bio_set);
-		ib_dev->ibd_bio_set = NULL;
-	}
-	ib_dev->ibd_bd = NULL;
-	return ERR_PTR(ret);
+out_free_bioset:
+	bioset_free(ib_dev->ibd_bio_set);
+	ib_dev->ibd_bio_set = NULL;
+out:
+	return ret;
 }
 
-static void iblock_free_device(void *p)
+static void iblock_free_device(struct se_device *dev)
 {
-	struct iblock_dev *ib_dev = p;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
 
 	if (ib_dev->ibd_bd != NULL)
 		blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
@@ -203,12 +183,12 @@ static unsigned long long iblock_emulate_read_cap_with_block_size(
 					bdev_logical_block_size(bd)) - 1);
 	u32 block_size = bdev_logical_block_size(bd);
 
-	if (block_size == dev->se_sub_dev->se_dev_attrib.block_size)
+	if (block_size == dev->dev_attrib.block_size)
 		return blocks_long;
 
 	switch (block_size) {
 	case 4096:
-		switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+		switch (dev->dev_attrib.block_size) {
 		case 2048:
 			blocks_long <<= 1;
 			break;
@@ -222,7 +202,7 @@ static unsigned long long iblock_emulate_read_cap_with_block_size(
 		}
 		break;
 	case 2048:
-		switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+		switch (dev->dev_attrib.block_size) {
 		case 4096:
 			blocks_long >>= 1;
 			break;
@@ -237,7 +217,7 @@ static unsigned long long iblock_emulate_read_cap_with_block_size(
 		}
 		break;
 	case 1024:
-		switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+		switch (dev->dev_attrib.block_size) {
 		case 4096:
 			blocks_long >>= 2;
 			break;
@@ -252,7 +232,7 @@ static unsigned long long iblock_emulate_read_cap_with_block_size(
 		}
 		break;
 	case 512:
-		switch (dev->se_sub_dev->se_dev_attrib.block_size) {
+		switch (dev->dev_attrib.block_size) {
 		case 4096:
 			blocks_long >>= 3;
 			break;
@@ -273,6 +253,87 @@ static unsigned long long iblock_emulate_read_cap_with_block_size(
 	return blocks_long;
 }
 
+static void iblock_complete_cmd(struct se_cmd *cmd)
+{
+	struct iblock_req *ibr = cmd->priv;
+	u8 status;
+
+	if (!atomic_dec_and_test(&ibr->pending))
+		return;
+
+	if (atomic_read(&ibr->ib_bio_err_cnt))
+		status = SAM_STAT_CHECK_CONDITION;
+	else
+		status = SAM_STAT_GOOD;
+
+	target_complete_cmd(cmd, status);
+	kfree(ibr);
+}
+
+static void iblock_bio_done(struct bio *bio, int err)
+{
+	struct se_cmd *cmd = bio->bi_private;
+	struct iblock_req *ibr = cmd->priv;
+
+	/*
+	 * Set -EIO if !BIO_UPTODATE and the passed is still err=0
+	 */
+	if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err)
+		err = -EIO;
+
+	if (err != 0) {
+		pr_err("test_bit(BIO_UPTODATE) failed for bio: %p,"
+			" err: %d\n", bio, err);
+		/*
+		 * Bump the ib_bio_err_cnt and release bio.
+		 */
+		atomic_inc(&ibr->ib_bio_err_cnt);
+		smp_mb__after_atomic_inc();
+	}
+
+	bio_put(bio);
+
+	iblock_complete_cmd(cmd);
+}
+
+static struct bio *
+iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num)
+{
+	struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev);
+	struct bio *bio;
+
+	/*
+	 * Only allocate as many vector entries as the bio code allows us to,
+	 * we'll loop later on until we have handled the whole request.
+	 */
+	if (sg_num > BIO_MAX_PAGES)
+		sg_num = BIO_MAX_PAGES;
+
+	bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set);
+	if (!bio) {
+		pr_err("Unable to allocate memory for bio\n");
+		return NULL;
+	}
+
+	bio->bi_bdev = ib_dev->ibd_bd;
+	bio->bi_private = cmd;
+	bio->bi_end_io = &iblock_bio_done;
+	bio->bi_sector = lba;
+
+	return bio;
+}
+
+static void iblock_submit_bios(struct bio_list *list, int rw)
+{
+	struct blk_plug plug;
+	struct bio *bio;
+
+	blk_start_plug(&plug);
+	while ((bio = bio_list_pop(list)))
+		submit_bio(rw, bio);
+	blk_finish_plug(&plug);
+}
+
 static void iblock_end_io_flush(struct bio *bio, int err)
 {
 	struct se_cmd *cmd = bio->bi_private;
@@ -281,13 +342,10 @@ static void iblock_end_io_flush(struct bio *bio, int err)
 		pr_err("IBLOCK: cache flush failed: %d\n", err);
 
 	if (cmd) {
-		if (err) {
-			cmd->scsi_sense_reason =
-				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		if (err)
 			target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
-		} else {
+		else
 			target_complete_cmd(cmd, SAM_STAT_GOOD);
-		}
 	}
 
 	bio_put(bio);
@@ -297,9 +355,10 @@ static void iblock_end_io_flush(struct bio *bio, int err)
  * Implement SYCHRONIZE CACHE.  Note that we can't handle lba ranges and must
  * always flush the whole cache.
  */
-static int iblock_execute_sync_cache(struct se_cmd *cmd)
+static sense_reason_t
+iblock_execute_sync_cache(struct se_cmd *cmd)
 {
-	struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev);
 	int immed = (cmd->t_task_cdb[1] & 0x2);
 	struct bio *bio;
 
@@ -319,25 +378,27 @@ static int iblock_execute_sync_cache(struct se_cmd *cmd)
 	return 0;
 }
 
-static int iblock_execute_unmap(struct se_cmd *cmd)
+static sense_reason_t
+iblock_execute_unmap(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
-	struct iblock_dev *ibd = dev->dev_ptr;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
 	unsigned char *buf, *ptr = NULL;
 	sector_t lba;
 	int size;
 	u32 range;
-	int ret = 0;
-	int dl, bd_dl;
+	sense_reason_t ret = 0;
+	int dl, bd_dl, err;
 
 	if (cmd->data_length < 8) {
 		pr_warn("UNMAP parameter list length %u too small\n",
 			cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
 	dl = get_unaligned_be16(&buf[0]);
 	bd_dl = get_unaligned_be16(&buf[2]);
@@ -349,9 +410,8 @@ static int iblock_execute_unmap(struct se_cmd *cmd)
 	else
 		size = bd_dl;
 
-	if (size / 16 > dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+	if (size / 16 > dev->dev_attrib.max_unmap_block_desc_count) {
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto err;
 	}
 
@@ -366,23 +426,22 @@ static int iblock_execute_unmap(struct se_cmd *cmd)
 		pr_debug("UNMAP: Using lba: %llu and range: %u\n",
 				 (unsigned long long)lba, range);
 
-		if (range > dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count) {
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			ret = -EINVAL;
+		if (range > dev->dev_attrib.max_unmap_lba_count) {
+			ret = TCM_INVALID_PARAMETER_LIST;
 			goto err;
 		}
 
 		if (lba + range > dev->transport->get_blocks(dev) + 1) {
-			cmd->scsi_sense_reason = TCM_ADDRESS_OUT_OF_RANGE;
-			ret = -EINVAL;
+			ret = TCM_ADDRESS_OUT_OF_RANGE;
 			goto err;
 		}
 
-		ret = blkdev_issue_discard(ibd->ibd_bd, lba, range,
+		err = blkdev_issue_discard(ib_dev->ibd_bd, lba, range,
 					   GFP_KERNEL, 0);
-		if (ret < 0) {
+		if (err < 0) {
 			pr_err("blkdev_issue_discard() failed: %d\n",
-					ret);
+					err);
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 			goto err;
 		}
 
@@ -397,23 +456,86 @@ err:
 	return ret;
 }
 
-static int iblock_execute_write_same(struct se_cmd *cmd)
+static sense_reason_t
+iblock_execute_write_same_unmap(struct se_cmd *cmd)
 {
-	struct iblock_dev *ibd = cmd->se_dev->dev_ptr;
-	int ret;
-
-	ret = blkdev_issue_discard(ibd->ibd_bd, cmd->t_task_lba,
-				   spc_get_write_same_sectors(cmd), GFP_KERNEL,
-				   0);
-	if (ret < 0) {
-		pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n");
-		return ret;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev);
+	int rc;
+
+	rc = blkdev_issue_discard(ib_dev->ibd_bd, cmd->t_task_lba,
+			spc_get_write_same_sectors(cmd), GFP_KERNEL, 0);
+	if (rc < 0) {
+		pr_warn("blkdev_issue_discard() failed: %d\n", rc);
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 
 	target_complete_cmd(cmd, GOOD);
 	return 0;
 }
 
+static sense_reason_t
+iblock_execute_write_same(struct se_cmd *cmd)
+{
+	struct iblock_req *ibr;
+	struct scatterlist *sg;
+	struct bio *bio;
+	struct bio_list list;
+	sector_t block_lba = cmd->t_task_lba;
+	sector_t sectors = spc_get_write_same_sectors(cmd);
+
+	sg = &cmd->t_data_sg[0];
+
+	if (cmd->t_data_nents > 1 ||
+	    sg->length != cmd->se_dev->dev_attrib.block_size) {
+		pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u"
+			" block_size: %u\n", cmd->t_data_nents, sg->length,
+			cmd->se_dev->dev_attrib.block_size);
+		return TCM_INVALID_CDB_FIELD;
+	}
+
+	ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
+	if (!ibr)
+		goto fail;
+	cmd->priv = ibr;
+
+	bio = iblock_get_bio(cmd, block_lba, 1);
+	if (!bio)
+		goto fail_free_ibr;
+
+	bio_list_init(&list);
+	bio_list_add(&list, bio);
+
+	atomic_set(&ibr->pending, 1);
+
+	while (sectors) {
+		while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset)
+				!= sg->length) {
+
+			bio = iblock_get_bio(cmd, block_lba, 1);
+			if (!bio)
+				goto fail_put_bios;
+
+			atomic_inc(&ibr->pending);
+			bio_list_add(&list, bio);
+		}
+
+		/* Always in 512 byte units for Linux/Block */
+		block_lba += sg->length >> IBLOCK_LBA_SHIFT;
+		sectors -= 1;
+	}
+
+	iblock_submit_bios(&list, WRITE);
+	return 0;
+
+fail_put_bios:
+	while ((bio = bio_list_pop(&list)))
+		bio_put(bio);
+fail_free_ibr:
+	kfree(ibr);
+fail:
+	return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+}
+
 enum {
 	Opt_udev_path, Opt_readonly, Opt_force, Opt_err
 };
@@ -425,11 +547,10 @@ static match_table_t tokens = {
 	{Opt_err, NULL}
 };
 
-static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba,
-					       struct se_subsystem_dev *se_dev,
-					       const char *page, ssize_t count)
+static ssize_t iblock_set_configfs_dev_params(struct se_device *dev,
+		const char *page, ssize_t count)
 {
-	struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
 	char *orig, *ptr, *arg_p, *opts;
 	substring_t args[MAX_OPT_ARGS];
 	int ret = 0, token;
@@ -491,43 +612,26 @@ out:
 	return (!ret) ? count : ret;
 }
 
-static ssize_t iblock_check_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev)
+static ssize_t iblock_show_configfs_dev_params(struct se_device *dev, char *b)
 {
-	struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
-
-	if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) {
-		pr_err("Missing udev_path= parameters for IBLOCK\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static ssize_t iblock_show_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	char *b)
-{
-	struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
-	struct block_device *bd = ibd->ibd_bd;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+	struct block_device *bd = ib_dev->ibd_bd;
 	char buf[BDEVNAME_SIZE];
 	ssize_t bl = 0;
 
 	if (bd)
 		bl += sprintf(b + bl, "iBlock device: %s",
 				bdevname(bd, buf));
-	if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH)
+	if (ib_dev->ibd_flags & IBDF_HAS_UDEV_PATH)
 		bl += sprintf(b + bl, "  UDEV PATH: %s",
-				ibd->ibd_udev_path);
-	bl += sprintf(b + bl, "  readonly: %d\n", ibd->ibd_readonly);
+				ib_dev->ibd_udev_path);
+	bl += sprintf(b + bl, "  readonly: %d\n", ib_dev->ibd_readonly);
 
 	bl += sprintf(b + bl, "        ");
 	if (bd) {
 		bl += sprintf(b + bl, "Major: %d Minor: %d  %s\n",
 			MAJOR(bd->bd_dev), MINOR(bd->bd_dev), (!bd->bd_contains) ?
-			"" : (bd->bd_holder == ibd) ?
+			"" : (bd->bd_holder == ib_dev) ?
 			"CLAIMED: IBLOCK" : "CLAIMED: OS");
 	} else {
 		bl += sprintf(b + bl, "Major: 0 Minor: 0\n");
@@ -536,61 +640,8 @@ static ssize_t iblock_show_configfs_dev_params(
 	return bl;
 }
 
-static void iblock_complete_cmd(struct se_cmd *cmd)
-{
-	struct iblock_req *ibr = cmd->priv;
-	u8 status;
-
-	if (!atomic_dec_and_test(&ibr->pending))
-		return;
-
-	if (atomic_read(&ibr->ib_bio_err_cnt))
-		status = SAM_STAT_CHECK_CONDITION;
-	else
-		status = SAM_STAT_GOOD;
-
-	target_complete_cmd(cmd, status);
-	kfree(ibr);
-}
-
-static struct bio *
-iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num)
-{
-	struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
-	struct bio *bio;
-
-	/*
-	 * Only allocate as many vector entries as the bio code allows us to,
-	 * we'll loop later on until we have handled the whole request.
-	 */
-	if (sg_num > BIO_MAX_PAGES)
-		sg_num = BIO_MAX_PAGES;
-
-	bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set);
-	if (!bio) {
-		pr_err("Unable to allocate memory for bio\n");
-		return NULL;
-	}
-
-	bio->bi_bdev = ib_dev->ibd_bd;
-	bio->bi_private = cmd;
-	bio->bi_end_io = &iblock_bio_done;
-	bio->bi_sector = lba;
-	return bio;
-}
-
-static void iblock_submit_bios(struct bio_list *list, int rw)
-{
-	struct blk_plug plug;
-	struct bio *bio;
-
-	blk_start_plug(&plug);
-	while ((bio = bio_list_pop(list)))
-		submit_bio(rw, bio);
-	blk_finish_plug(&plug);
-}
-
-static int iblock_execute_rw(struct se_cmd *cmd)
+static sense_reason_t
+iblock_execute_rw(struct se_cmd *cmd)
 {
 	struct scatterlist *sgl = cmd->t_data_sg;
 	u32 sgl_nents = cmd->t_data_nents;
@@ -611,8 +662,8 @@ static int iblock_execute_rw(struct se_cmd *cmd)
 		 * Force data to disk if we pretend to not have a volatile
 		 * write cache, or the initiator set the Force Unit Access bit.
 		 */
-		if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 ||
-		    (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
+		if (dev->dev_attrib.emulate_write_cache == 0 ||
+		    (dev->dev_attrib.emulate_fua_write > 0 &&
 		     (cmd->se_cmd_flags & SCF_FUA)))
 			rw = WRITE_FUA;
 		else
@@ -625,19 +676,18 @@ static int iblock_execute_rw(struct se_cmd *cmd)
 	 * Convert the blocksize advertised to the initiator to the 512 byte
 	 * units unconditionally used by the Linux block layer.
 	 */
-	if (dev->se_sub_dev->se_dev_attrib.block_size == 4096)
+	if (dev->dev_attrib.block_size == 4096)
 		block_lba = (cmd->t_task_lba << 3);
-	else if (dev->se_sub_dev->se_dev_attrib.block_size == 2048)
+	else if (dev->dev_attrib.block_size == 2048)
 		block_lba = (cmd->t_task_lba << 2);
-	else if (dev->se_sub_dev->se_dev_attrib.block_size == 1024)
+	else if (dev->dev_attrib.block_size == 1024)
 		block_lba = (cmd->t_task_lba << 1);
-	else if (dev->se_sub_dev->se_dev_attrib.block_size == 512)
+	else if (dev->dev_attrib.block_size == 512)
 		block_lba = cmd->t_task_lba;
 	else {
 		pr_err("Unsupported SCSI -> BLOCK LBA conversion:"
-				" %u\n", dev->se_sub_dev->se_dev_attrib.block_size);
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -ENOSYS;
+				" %u\n", dev->dev_attrib.block_size);
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 
 	ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
@@ -697,83 +747,48 @@ fail_put_bios:
 		bio_put(bio);
 fail_free_ibr:
 	kfree(ibr);
-	cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 fail:
-	return -ENOMEM;
-}
-
-static u32 iblock_get_device_rev(struct se_device *dev)
-{
-	return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
-}
-
-static u32 iblock_get_device_type(struct se_device *dev)
-{
-	return TYPE_DISK;
+	return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 }
 
 static sector_t iblock_get_blocks(struct se_device *dev)
 {
-	struct iblock_dev *ibd = dev->dev_ptr;
-	struct block_device *bd = ibd->ibd_bd;
+	struct iblock_dev *ib_dev = IBLOCK_DEV(dev);
+	struct block_device *bd = ib_dev->ibd_bd;
 	struct request_queue *q = bdev_get_queue(bd);
 
 	return iblock_emulate_read_cap_with_block_size(dev, bd, q);
 }
 
-static void iblock_bio_done(struct bio *bio, int err)
-{
-	struct se_cmd *cmd = bio->bi_private;
-	struct iblock_req *ibr = cmd->priv;
-
-	/*
-	 * Set -EIO if !BIO_UPTODATE and the passed is still err=0
-	 */
-	if (!test_bit(BIO_UPTODATE, &bio->bi_flags) && !err)
-		err = -EIO;
-
-	if (err != 0) {
-		pr_err("test_bit(BIO_UPTODATE) failed for bio: %p,"
-			" err: %d\n", bio, err);
-		/*
-		 * Bump the ib_bio_err_cnt and release bio.
-		 */
-		atomic_inc(&ibr->ib_bio_err_cnt);
-		smp_mb__after_atomic_inc();
-	}
-
-	bio_put(bio);
-
-	iblock_complete_cmd(cmd);
-}
-
-static struct spc_ops iblock_spc_ops = {
+static struct sbc_ops iblock_sbc_ops = {
 	.execute_rw		= iblock_execute_rw,
 	.execute_sync_cache	= iblock_execute_sync_cache,
 	.execute_write_same	= iblock_execute_write_same,
+	.execute_write_same_unmap = iblock_execute_write_same_unmap,
 	.execute_unmap		= iblock_execute_unmap,
 };
 
-static int iblock_parse_cdb(struct se_cmd *cmd)
+static sense_reason_t
+iblock_parse_cdb(struct se_cmd *cmd)
 {
-	return sbc_parse_cdb(cmd, &iblock_spc_ops);
+	return sbc_parse_cdb(cmd, &iblock_sbc_ops);
 }
 
 static struct se_subsystem_api iblock_template = {
 	.name			= "iblock",
+	.inquiry_prod		= "IBLOCK",
+	.inquiry_rev		= IBLOCK_VERSION,
 	.owner			= THIS_MODULE,
 	.transport_type		= TRANSPORT_PLUGIN_VHBA_PDEV,
 	.attach_hba		= iblock_attach_hba,
 	.detach_hba		= iblock_detach_hba,
-	.allocate_virtdevice	= iblock_allocate_virtdevice,
-	.create_virtdevice	= iblock_create_virtdevice,
+	.alloc_device		= iblock_alloc_device,
+	.configure_device	= iblock_configure_device,
 	.free_device		= iblock_free_device,
 	.parse_cdb		= iblock_parse_cdb,
-	.check_configfs_dev_params = iblock_check_configfs_dev_params,
 	.set_configfs_dev_params = iblock_set_configfs_dev_params,
 	.show_configfs_dev_params = iblock_show_configfs_dev_params,
-	.get_device_rev		= iblock_get_device_rev,
-	.get_device_type	= iblock_get_device_type,
+	.get_device_type	= sbc_get_device_type,
 	.get_blocks		= iblock_get_blocks,
 };
 

drivers/target/target_core_iblock.h

@@ -14,6 +14,7 @@ struct iblock_req {
 #define IBDF_HAS_UDEV_PATH		0x01
 
 struct iblock_dev {
+	struct se_device dev;
 	unsigned char ibd_udev_path[SE_UDEV_PATH_LEN];
 	u32	ibd_flags;
 	struct bio_set	*ibd_bio_set;

drivers/target/target_core_internal.h

@@ -19,18 +19,12 @@ int	core_dev_export(struct se_device *, struct se_portal_group *,
 		struct se_lun *);
 void	core_dev_unexport(struct se_device *, struct se_portal_group *,
 		struct se_lun *);
-int	target_report_luns(struct se_cmd *);
-void	se_release_device_for_hba(struct se_device *);
-void	se_release_vpd_for_dev(struct se_device *);
-int	se_free_virtual_device(struct se_device *, struct se_hba *);
-int	se_dev_check_online(struct se_device *);
-int	se_dev_check_shutdown(struct se_device *);
-void	se_dev_set_default_attribs(struct se_device *, struct se_dev_limits *);
 int	se_dev_set_task_timeout(struct se_device *, u32);
 int	se_dev_set_max_unmap_lba_count(struct se_device *, u32);
 int	se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
 int	se_dev_set_unmap_granularity(struct se_device *, u32);
 int	se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
+int	se_dev_set_max_write_same_len(struct se_device *, u32);
 int	se_dev_set_emulate_dpo(struct se_device *, int);
 int	se_dev_set_emulate_fua_write(struct se_device *, int);
 int	se_dev_set_emulate_fua_read(struct se_device *, int);
@@ -60,6 +54,9 @@ void	core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
 		struct se_lun_acl *lacl);
 int	core_dev_setup_virtual_lun0(void);
 void	core_dev_release_virtual_lun0(void);
+struct se_device *target_alloc_device(struct se_hba *hba, const char *name);
+int	target_configure_device(struct se_device *dev);
+void	target_free_device(struct se_device *);
 
 /* target_core_hba.c */
 struct se_hba *core_alloc_hba(const char *, u32, u32);
@@ -105,10 +102,11 @@ int	transport_dump_vpd_ident(struct t10_vpd *, unsigned char *, int);
 bool	target_stop_cmd(struct se_cmd *cmd, unsigned long *flags);
 int	transport_clear_lun_from_sessions(struct se_lun *);
 void	transport_send_task_abort(struct se_cmd *);
-int	target_cmd_size_check(struct se_cmd *cmd, unsigned int size);
+sense_reason_t	target_cmd_size_check(struct se_cmd *cmd, unsigned int size);
+void	target_qf_do_work(struct work_struct *work);
 
 /* target_core_stat.c */
-void	target_stat_setup_dev_default_groups(struct se_subsystem_dev *);
+void	target_stat_setup_dev_default_groups(struct se_device *);
 void	target_stat_setup_port_default_groups(struct se_lun *);
 void	target_stat_setup_mappedlun_default_groups(struct se_lun_acl *);
 

drivers/target/target_core_pr.c

@@ -4,8 +4,7 @@
  * This file contains SPC-3 compliant persistent reservations and
  * legacy SPC-2 reservations with compatible reservation handling (CRH=1)
  *
- * Copyright (c) 2009, 2010 Rising Tide Systems
- * Copyright (c) 2009, 2010 Linux-iSCSI.org
+ * (c) Copyright 2009-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -68,49 +67,33 @@ int core_pr_dump_initiator_port(
 static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *,
 			struct t10_pr_registration *, int);
 
-static int core_scsi2_reservation_seq_non_holder(
-	struct se_cmd *cmd,
-	unsigned char *cdb,
-	u32 pr_reg_type)
+static sense_reason_t
+target_scsi2_reservation_check(struct se_cmd *cmd)
 {
-	switch (cdb[0]) {
+	struct se_device *dev = cmd->se_dev;
+	struct se_session *sess = cmd->se_sess;
+
+	switch (cmd->t_task_cdb[0]) {
 	case INQUIRY:
 	case RELEASE:
 	case RELEASE_10:
 		return 0;
 	default:
-		return 1;
+		break;
 	}
 
-	return 1;
-}
-
-static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type)
-{
-	struct se_device *dev = cmd->se_dev;
-	struct se_session *sess = cmd->se_sess;
-	int ret;
-
-	if (!sess)
+	if (!dev->dev_reserved_node_acl || !sess)
 		return 0;
 
-	spin_lock(&dev->dev_reservation_lock);
-	if (!dev->dev_reserved_node_acl || !sess) {
-		spin_unlock(&dev->dev_reservation_lock);
-		return 0;
-	}
-	if (dev->dev_reserved_node_acl != sess->se_node_acl) {
-		spin_unlock(&dev->dev_reservation_lock);
-		return -EINVAL;
-	}
-	if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) {
-		spin_unlock(&dev->dev_reservation_lock);
-		return 0;
+	if (dev->dev_reserved_node_acl != sess->se_node_acl)
+		return TCM_RESERVATION_CONFLICT;
+
+	if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) {
+		if (dev->dev_res_bin_isid != sess->sess_bin_isid)
+			return TCM_RESERVATION_CONFLICT;
 	}
-	ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL;
-	spin_unlock(&dev->dev_reservation_lock);
 
-	return ret;
+	return 0;
 }
 
 static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *,
@@ -120,15 +103,11 @@ static void core_scsi3_put_pr_reg(struct t10_pr_registration *);
 static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd)
 {
 	struct se_session *se_sess = cmd->se_sess;
-	struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct t10_pr_registration *pr_reg;
-	struct t10_reservation *pr_tmpl = &su_dev->t10_pr;
-	int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS);
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	int conflict = 0;
 
-	if (!crh)
-		return -EINVAL;
-
 	pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
 			se_sess);
 	if (pr_reg) {
@@ -186,32 +165,28 @@ static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd)
 		pr_err("Received legacy SPC-2 RESERVE/RELEASE"
 			" while active SPC-3 registrations exist,"
 			" returning RESERVATION_CONFLICT\n");
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
 		return -EBUSY;
 	}
 
 	return 0;
 }
 
-int target_scsi2_reservation_release(struct se_cmd *cmd)
+sense_reason_t
+target_scsi2_reservation_release(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_session *sess = cmd->se_sess;
 	struct se_portal_group *tpg;
-	int ret = 0, rc;
+	int rc;
 
 	if (!sess || !sess->se_tpg)
 		goto out;
 	rc = target_check_scsi2_reservation_conflict(cmd);
 	if (rc == 1)
 		goto out;
-	else if (rc < 0) {
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		ret = -EINVAL;
-		goto out;
-	}
+	if (rc < 0)
+		return TCM_RESERVATION_CONFLICT;
 
-	ret = 0;
 	spin_lock(&dev->dev_reservation_lock);
 	if (!dev->dev_reserved_node_acl || !sess)
 		goto out_unlock;
@@ -223,10 +198,10 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
 		goto out_unlock;
 
 	dev->dev_reserved_node_acl = NULL;
-	dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
-	if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {
+	dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS;
+	if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS_WITH_ISID) {
 		dev->dev_res_bin_isid = 0;
-		dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
+		dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS_WITH_ISID;
 	}
 	tpg = sess->se_tpg;
 	pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
@@ -237,25 +212,24 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
 out_unlock:
 	spin_unlock(&dev->dev_reservation_lock);
 out:
-	if (!ret)
-		target_complete_cmd(cmd, GOOD);
-	return ret;
+	target_complete_cmd(cmd, GOOD);
+	return 0;
 }
 
-int target_scsi2_reservation_reserve(struct se_cmd *cmd)
+sense_reason_t
+target_scsi2_reservation_reserve(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_session *sess = cmd->se_sess;
 	struct se_portal_group *tpg;
-	int ret = 0, rc;
+	sense_reason_t ret = 0;
+	int rc;
 
 	if ((cmd->t_task_cdb[1] & 0x01) &&
 	    (cmd->t_task_cdb[1] & 0x02)) {
 		pr_err("LongIO and Obselete Bits set, returning"
 				" ILLEGAL_REQUEST\n");
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-		ret = -EINVAL;
-		goto out;
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
 	}
 	/*
 	 * This is currently the case for target_core_mod passthrough struct se_cmd
@@ -266,13 +240,10 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
 	rc = target_check_scsi2_reservation_conflict(cmd);
 	if (rc == 1)
 		goto out;
-	else if (rc < 0) {
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		ret = -EINVAL;
-		goto out;
-	}
 
-	ret = 0;
+	if (rc < 0)
+		return TCM_RESERVATION_CONFLICT;
+
 	tpg = sess->se_tpg;
 	spin_lock(&dev->dev_reservation_lock);
 	if (dev->dev_reserved_node_acl &&
@@ -286,16 +257,15 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
 			" from %s \n", cmd->se_lun->unpacked_lun,
 			cmd->se_deve->mapped_lun,
 			sess->se_node_acl->initiatorname);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		ret = -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
 		goto out_unlock;
 	}
 
 	dev->dev_reserved_node_acl = sess->se_node_acl;
-	dev->dev_flags |= DF_SPC2_RESERVATIONS;
+	dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS;
 	if (sess->sess_bin_isid != 0) {
 		dev->dev_res_bin_isid = sess->sess_bin_isid;
-		dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID;
+		dev->dev_reservation_flags |= DRF_SPC2_RESERVATIONS_WITH_ISID;
 	}
 	pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
 		" for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
@@ -319,9 +289,9 @@ out:
  */
 static int core_scsi3_pr_seq_non_holder(
 	struct se_cmd *cmd,
-	unsigned char *cdb,
 	u32 pr_reg_type)
 {
+	unsigned char *cdb = cmd->t_task_cdb;
 	struct se_dev_entry *se_deve;
 	struct se_session *se_sess = cmd->se_sess;
 	int other_cdb = 0, ignore_reg;
@@ -330,17 +300,11 @@ static int core_scsi3_pr_seq_non_holder(
 	int we = 0; /* Write Exclusive */
 	int legacy = 0; /* Act like a legacy device and return
 			 * RESERVATION CONFLICT on some CDBs */
-	/*
-	 * A legacy SPC-2 reservation is being held.
-	 */
-	if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS)
-		return core_scsi2_reservation_seq_non_holder(cmd,
-					cdb, pr_reg_type);
 
 	se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
 	/*
 	 * Determine if the registration should be ignored due to
-	 * non-matching ISIDs in core_scsi3_pr_reservation_check().
+	 * non-matching ISIDs in target_scsi3_pr_reservation_check().
 	 */
 	ignore_reg = (pr_reg_type & 0x80000000);
 	if (ignore_reg)
@@ -563,10 +527,41 @@ static int core_scsi3_pr_seq_non_holder(
 	return 1; /* Conflict by default */
 }
 
+static sense_reason_t
+target_scsi3_pr_reservation_check(struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+	struct se_session *sess = cmd->se_sess;
+	u32 pr_reg_type;
+
+	if (!dev->dev_pr_res_holder)
+		return 0;
+
+	pr_reg_type = dev->dev_pr_res_holder->pr_res_type;
+	cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key;
+	if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl)
+		goto check_nonholder;
+
+	if (dev->dev_pr_res_holder->isid_present_at_reg) {
+		if (dev->dev_pr_res_holder->pr_reg_bin_isid !=
+		    sess->sess_bin_isid) {
+			pr_reg_type |= 0x80000000;
+			goto check_nonholder;
+		}
+	}
+
+	return 0;
+
+check_nonholder:
+	if (core_scsi3_pr_seq_non_holder(cmd, pr_reg_type))
+		return TCM_RESERVATION_CONFLICT;
+	return 0;
+}
+
 static u32 core_scsi3_pr_generation(struct se_device *dev)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	u32 prg;
+
 	/*
 	 * PRGeneration field shall contain the value of a 32-bit wrapping
 	 * counter mainted by the device server.
@@ -577,56 +572,12 @@ static u32 core_scsi3_pr_generation(struct se_device *dev)
 	 * See spc4r17 section 6.3.12 READ_KEYS service action
 	 */
 	spin_lock(&dev->dev_reservation_lock);
-	prg = su_dev->t10_pr.pr_generation++;
+	prg = dev->t10_pr.pr_generation++;
 	spin_unlock(&dev->dev_reservation_lock);
 
 	return prg;
 }
 
-static int core_scsi3_pr_reservation_check(
-	struct se_cmd *cmd,
-	u32 *pr_reg_type)
-{
-	struct se_device *dev = cmd->se_dev;
-	struct se_session *sess = cmd->se_sess;
-	int ret;
-
-	if (!sess)
-		return 0;
-	/*
-	 * A legacy SPC-2 reservation is being held.
-	 */
-	if (dev->dev_flags & DF_SPC2_RESERVATIONS)
-		return core_scsi2_reservation_check(cmd, pr_reg_type);
-
-	spin_lock(&dev->dev_reservation_lock);
-	if (!dev->dev_pr_res_holder) {
-		spin_unlock(&dev->dev_reservation_lock);
-		return 0;
-	}
-	*pr_reg_type = dev->dev_pr_res_holder->pr_res_type;
-	cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key;
-	if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) {
-		spin_unlock(&dev->dev_reservation_lock);
-		return -EINVAL;
-	}
-	if (!dev->dev_pr_res_holder->isid_present_at_reg) {
-		spin_unlock(&dev->dev_reservation_lock);
-		return 0;
-	}
-	ret = (dev->dev_pr_res_holder->pr_reg_bin_isid ==
-	       sess->sess_bin_isid) ? 0 : -EINVAL;
-	/*
-	 * Use bit in *pr_reg_type to notify ISID mismatch in
-	 * core_scsi3_pr_seq_non_holder().
-	 */
-	if (ret != 0)
-		*pr_reg_type |= 0x80000000;
-	spin_unlock(&dev->dev_reservation_lock);
-
-	return ret;
-}
-
 static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
 	struct se_device *dev,
 	struct se_node_acl *nacl,
@@ -636,7 +587,6 @@ static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
 	int all_tg_pt,
 	int aptpl)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct t10_pr_registration *pr_reg;
 
 	pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC);
@@ -645,7 +595,7 @@ static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
 		return NULL;
 	}
 
-	pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len,
+	pr_reg->pr_aptpl_buf = kzalloc(dev->t10_pr.pr_aptpl_buf_len,
 					GFP_ATOMIC);
 	if (!pr_reg->pr_aptpl_buf) {
 		pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n");
@@ -929,7 +879,7 @@ static int __core_scsi3_check_aptpl_registration(
 	struct se_dev_entry *deve)
 {
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	unsigned char i_port[PR_APTPL_MAX_IPORT_LEN];
 	unsigned char t_port[PR_APTPL_MAX_TPORT_LEN];
 	u16 tpgt;
@@ -996,11 +946,10 @@ int core_scsi3_check_aptpl_registration(
 	struct se_lun *lun,
 	struct se_lun_acl *lun_acl)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct se_node_acl *nacl = lun_acl->se_lun_nacl;
 	struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun];
 
-	if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
+	if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
 		return 0;
 
 	return __core_scsi3_check_aptpl_registration(dev, tpg, lun,
@@ -1051,10 +1000,9 @@ static void __core_scsi3_add_registration(
 	int register_type,
 	int register_move)
 {
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
 	struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 
 	/*
 	 * Increment PRgeneration counter for struct se_device upon a successful
@@ -1066,7 +1014,7 @@ static void __core_scsi3_add_registration(
 	 * for the REGISTER.
 	 */
 	pr_reg->pr_res_generation = (register_move) ?
-			su_dev->t10_pr.pr_generation++ :
+			dev->t10_pr.pr_generation++ :
 			core_scsi3_pr_generation(dev);
 
 	spin_lock(&pr_tmpl->registration_lock);
@@ -1135,7 +1083,7 @@ static struct t10_pr_registration *__core_scsi3_locate_pr_reg(
 	struct se_node_acl *nacl,
 	unsigned char *isid)
 {
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp;
 	struct se_portal_group *tpg;
 
@@ -1160,7 +1108,7 @@ static struct t10_pr_registration *__core_scsi3_locate_pr_reg(
 			 * for fabric modules (iSCSI) requiring them.
 			 */
 			if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
-				if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids)
+				if (dev->dev_attrib.enforce_pr_isids)
 					continue;
 			}
 			atomic_inc(&pr_reg->pr_res_holders);
@@ -1274,7 +1222,7 @@ static void __core_scsi3_free_registration(
 {
 	struct target_core_fabric_ops *tfo =
 			pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	char i_buf[PR_REG_ISID_ID_LEN];
 	int prf_isid;
 
@@ -1335,7 +1283,7 @@ void core_scsi3_free_pr_reg_from_nacl(
 	struct se_device *dev,
 	struct se_node_acl *nacl)
 {
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
 	/*
 	 * If the passed se_node_acl matches the reservation holder,
@@ -1365,7 +1313,7 @@ void core_scsi3_free_pr_reg_from_nacl(
 void core_scsi3_free_all_registrations(
 	struct se_device *dev)
 {
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
 
 	spin_lock(&dev->dev_reservation_lock);
@@ -1479,7 +1427,8 @@ static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve)
 	smp_mb__after_atomic_dec();
 }
 
-static int core_scsi3_decode_spec_i_port(
+static sense_reason_t
+core_scsi3_decode_spec_i_port(
 	struct se_cmd *cmd,
 	struct se_portal_group *tpg,
 	unsigned char *l_isid,
@@ -1501,8 +1450,9 @@ static int core_scsi3_decode_spec_i_port(
 	unsigned char *buf;
 	unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
 	char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
+	sense_reason_t ret;
 	u32 tpdl, tid_len = 0;
-	int ret, dest_local_nexus, prf_isid;
+	int dest_local_nexus, prf_isid;
 	u32 dest_rtpi = 0;
 
 	memset(dest_iport, 0, 64);
@@ -1517,8 +1467,7 @@ static int core_scsi3_decode_spec_i_port(
 	tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL);
 	if (!tidh_new) {
 		pr_err("Unable to allocate tidh_new\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	INIT_LIST_HEAD(&tidh_new->dest_list);
 	tidh_new->dest_tpg = tpg;
@@ -1530,8 +1479,7 @@ static int core_scsi3_decode_spec_i_port(
 				sa_res_key, all_tg_pt, aptpl);
 	if (!local_pr_reg) {
 		kfree(tidh_new);
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -ENOMEM;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	tidh_new->dest_pr_reg = local_pr_reg;
 	/*
@@ -1545,12 +1493,16 @@ static int core_scsi3_decode_spec_i_port(
 	if (cmd->data_length < 28) {
 		pr_warn("SPC-PR: Received PR OUT parameter list"
 			" length too small: %u\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf) {
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		goto out;
+	}
+
 	/*
 	 * For a PERSISTENT RESERVE OUT specify initiator ports payload,
 	 * first extract TransportID Parameter Data Length, and make sure
@@ -1565,9 +1517,8 @@ static int core_scsi3_decode_spec_i_port(
 		pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header"
 			" does not equal CDB data_length: %u\n", tpdl,
 			cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
-		goto out;
+		ret = TCM_INVALID_PARAMETER_LIST;
+		goto out_unmap;
 	}
 	/*
 	 * Start processing the received transport IDs using the
@@ -1610,16 +1561,13 @@ static int core_scsi3_decode_spec_i_port(
 			smp_mb__after_atomic_inc();
 			spin_unlock(&dev->se_port_lock);
 
-			ret = core_scsi3_tpg_depend_item(tmp_tpg);
-			if (ret != 0) {
+			if (core_scsi3_tpg_depend_item(tmp_tpg)) {
 				pr_err(" core_scsi3_tpg_depend_item()"
 					" for tmp_tpg\n");
 				atomic_dec(&tmp_tpg->tpg_pr_ref_count);
 				smp_mb__after_atomic_dec();
-				cmd->scsi_sense_reason =
-					TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-				ret = -EINVAL;
-				goto out;
+				ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+				goto out_unmap;
 			}
 			/*
 			 * Locate the destination initiator ACL to be registered
@@ -1641,17 +1589,14 @@ static int core_scsi3_decode_spec_i_port(
 				continue;
 			}
 
-			ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
-			if (ret != 0) {
+			if (core_scsi3_nodeacl_depend_item(dest_node_acl)) {
 				pr_err("configfs_depend_item() failed"
 					" for dest_node_acl->acl_group\n");
 				atomic_dec(&dest_node_acl->acl_pr_ref_count);
 				smp_mb__after_atomic_dec();
 				core_scsi3_tpg_undepend_item(tmp_tpg);
-				cmd->scsi_sense_reason =
-					TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-				ret = -EINVAL;
-				goto out;
+				ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+				goto out_unmap;
 			}
 
 			dest_tpg = tmp_tpg;
@@ -1668,9 +1613,8 @@ static int core_scsi3_decode_spec_i_port(
 		if (!dest_tpg) {
 			pr_err("SPC-3 PR SPEC_I_PT: Unable to locate"
 					" dest_tpg\n");
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			ret = -EINVAL;
-			goto out;
+			ret = TCM_INVALID_PARAMETER_LIST;
+			goto out_unmap;
 		}
 
 		pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u"
@@ -1683,9 +1627,8 @@ static int core_scsi3_decode_spec_i_port(
 				" %u for Transport ID: %s\n", tid_len, ptr);
 			core_scsi3_nodeacl_undepend_item(dest_node_acl);
 			core_scsi3_tpg_undepend_item(dest_tpg);
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			ret = -EINVAL;
-			goto out;
+			ret = TCM_INVALID_PARAMETER_LIST;
+			goto out_unmap;
 		}
 		/*
 		 * Locate the desintation struct se_dev_entry pointer for matching
@@ -1702,23 +1645,19 @@ static int core_scsi3_decode_spec_i_port(
 
 			core_scsi3_nodeacl_undepend_item(dest_node_acl);
 			core_scsi3_tpg_undepend_item(dest_tpg);
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			ret = -EINVAL;
-			goto out;
+			ret = TCM_INVALID_PARAMETER_LIST;
+			goto out_unmap;
 		}
 
-		ret = core_scsi3_lunacl_depend_item(dest_se_deve);
-		if (ret < 0) {
+		if (core_scsi3_lunacl_depend_item(dest_se_deve)) {
 			pr_err("core_scsi3_lunacl_depend_item()"
 					" failed\n");
 			atomic_dec(&dest_se_deve->pr_ref_count);
 			smp_mb__after_atomic_dec();
 			core_scsi3_nodeacl_undepend_item(dest_node_acl);
 			core_scsi3_tpg_undepend_item(dest_tpg);
-			cmd->scsi_sense_reason =
-				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-			ret = -EINVAL;
-			goto out;
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			goto out_unmap;
 		}
 
 		pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s"
@@ -1754,10 +1693,8 @@ static int core_scsi3_decode_spec_i_port(
 			core_scsi3_lunacl_undepend_item(dest_se_deve);
 			core_scsi3_nodeacl_undepend_item(dest_node_acl);
 			core_scsi3_tpg_undepend_item(dest_tpg);
-			cmd->scsi_sense_reason =
-				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-			ret = -ENOMEM;
-			goto out;
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			goto out_unmap;
 		}
 		INIT_LIST_HEAD(&tidh_new->dest_list);
 		tidh_new->dest_tpg = dest_tpg;
@@ -1788,9 +1725,8 @@ static int core_scsi3_decode_spec_i_port(
 			core_scsi3_nodeacl_undepend_item(dest_node_acl);
 			core_scsi3_tpg_undepend_item(dest_tpg);
 			kfree(tidh_new);
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			ret = -EINVAL;
-			goto out;
+			ret = TCM_INVALID_PARAMETER_LIST;
+			goto out_unmap;
 		}
 		tidh_new->dest_pr_reg = dest_pr_reg;
 		list_add_tail(&tidh_new->dest_list, &tid_dest_list);
@@ -1848,8 +1784,9 @@ static int core_scsi3_decode_spec_i_port(
 	}
 
 	return 0;
-out:
+out_unmap:
 	transport_kunmap_data_sg(cmd);
+out:
 	/*
 	 * For the failure case, release everything from tid_dest_list
 	 * including *dest_pr_reg and the configfs dependances..
@@ -1899,7 +1836,6 @@ static int __core_scsi3_update_aptpl_buf(
 {
 	struct se_lun *lun;
 	struct se_portal_group *tpg;
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct t10_pr_registration *pr_reg;
 	unsigned char tmp[512], isid_buf[32];
 	ssize_t len = 0;
@@ -1917,8 +1853,8 @@ static int __core_scsi3_update_aptpl_buf(
 	/*
 	 * Walk the registration list..
 	 */
-	spin_lock(&su_dev->t10_pr.registration_lock);
-	list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
+	spin_lock(&dev->t10_pr.registration_lock);
+	list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 			pr_reg_list) {
 
 		tmp[0] = '\0';
@@ -1963,7 +1899,7 @@ static int __core_scsi3_update_aptpl_buf(
 		if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
 			pr_err("Unable to update renaming"
 				" APTPL metadata\n");
-			spin_unlock(&su_dev->t10_pr.registration_lock);
+			spin_unlock(&dev->t10_pr.registration_lock);
 			return -EMSGSIZE;
 		}
 		len += sprintf(buf+len, "%s", tmp);
@@ -1981,13 +1917,13 @@ static int __core_scsi3_update_aptpl_buf(
 		if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
 			pr_err("Unable to update renaming"
 				" APTPL metadata\n");
-			spin_unlock(&su_dev->t10_pr.registration_lock);
+			spin_unlock(&dev->t10_pr.registration_lock);
 			return -EMSGSIZE;
 		}
 		len += sprintf(buf+len, "%s", tmp);
 		reg_count++;
 	}
-	spin_unlock(&su_dev->t10_pr.registration_lock);
+	spin_unlock(&dev->t10_pr.registration_lock);
 
 	if (!reg_count)
 		len += sprintf(buf+len, "No Registrations or Reservations");
@@ -2019,7 +1955,7 @@ static int __core_scsi3_write_aptpl_to_file(
 	unsigned char *buf,
 	u32 pr_aptpl_buf_len)
 {
-	struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn;
+	struct t10_wwn *wwn = &dev->t10_wwn;
 	struct file *file;
 	struct iovec iov[1];
 	mm_segment_t old_fs;
@@ -2065,14 +2001,15 @@ static int __core_scsi3_write_aptpl_to_file(
 	return 0;
 }
 
-static int core_scsi3_update_and_write_aptpl(
-	struct se_device *dev,
-	unsigned char *in_buf,
-	u32 in_pr_aptpl_buf_len)
+static int
+core_scsi3_update_and_write_aptpl(struct se_device *dev, unsigned char *in_buf,
+		u32 in_pr_aptpl_buf_len)
 {
 	unsigned char null_buf[64], *buf;
 	u32 pr_aptpl_buf_len;
-	int ret, clear_aptpl_metadata = 0;
+	int clear_aptpl_metadata = 0;
+	int ret;
+
 	/*
 	 * Can be called with a NULL pointer from PROUT service action CLEAR
 	 */
@@ -2094,25 +2031,17 @@ static int core_scsi3_update_and_write_aptpl(
 				clear_aptpl_metadata);
 	if (ret != 0)
 		return ret;
+
 	/*
 	 * __core_scsi3_write_aptpl_to_file() will call strlen()
 	 * on the passed buf to determine pr_aptpl_buf_len.
 	 */
-	ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0);
-	if (ret != 0)
-		return ret;
-
-	return ret;
+	return __core_scsi3_write_aptpl_to_file(dev, buf, 0);
 }
 
-static int core_scsi3_emulate_pro_register(
-	struct se_cmd *cmd,
-	u64 res_key,
-	u64 sa_res_key,
-	int aptpl,
-	int all_tg_pt,
-	int spec_i_pt,
-	int ignore_key)
+static sense_reason_t
+core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key,
+		int aptpl, int all_tg_pt, int spec_i_pt, int ignore_key)
 {
 	struct se_session *se_sess = cmd->se_sess;
 	struct se_device *dev = cmd->se_dev;
@@ -2120,16 +2049,16 @@ static int core_scsi3_emulate_pro_register(
 	struct se_lun *se_lun = cmd->se_lun;
 	struct se_portal_group *se_tpg;
 	struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	/* Used for APTPL metadata w/ UNREGISTER */
 	unsigned char *pr_aptpl_buf = NULL;
 	unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
-	int pr_holder = 0, ret = 0, type;
+	sense_reason_t ret;
+	int pr_holder = 0, type;
 
 	if (!se_sess || !se_lun) {
 		pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	se_tpg = se_sess->se_tpg;
 	se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
@@ -2148,8 +2077,7 @@ static int core_scsi3_emulate_pro_register(
 		if (res_key) {
 			pr_warn("SPC-3 PR: Reservation Key non-zero"
 				" for SA REGISTER, returning CONFLICT\n");
-			cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-			return -EINVAL;
+			return TCM_RESERVATION_CONFLICT;
 		}
 		/*
 		 * Do nothing but return GOOD status.
@@ -2163,15 +2091,13 @@ static int core_scsi3_emulate_pro_register(
 			 * Port Endpoint that the PRO was received from on the
 			 * Logical Unit of the SCSI device server.
 			 */
-			ret = core_scsi3_alloc_registration(cmd->se_dev,
+			if (core_scsi3_alloc_registration(cmd->se_dev,
 					se_sess->se_node_acl, se_deve, isid_ptr,
 					sa_res_key, all_tg_pt, aptpl,
-					ignore_key, 0);
-			if (ret != 0) {
+					ignore_key, 0)) {
 				pr_err("Unable to allocate"
 					" struct t10_pr_registration\n");
-				cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-				return -EINVAL;
+				return TCM_INVALID_PARAMETER_LIST;
 			}
 		} else {
 			/*
@@ -2205,201 +2131,192 @@ static int core_scsi3_emulate_pro_register(
 		pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev,
 				se_sess->se_node_acl, se_sess);
 
-		ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+		if (core_scsi3_update_and_write_aptpl(cmd->se_dev,
 				&pr_reg->pr_aptpl_buf[0],
-				pr_tmpl->pr_aptpl_buf_len);
-		if (!ret) {
+				pr_tmpl->pr_aptpl_buf_len)) {
 			pr_tmpl->pr_aptpl_active = 1;
 			pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n");
 		}
 
-		core_scsi3_put_pr_reg(pr_reg);
-		return ret;
-	} else {
-		/*
-		 * Locate the existing *pr_reg via struct se_node_acl pointers
-		 */
-		pr_reg = pr_reg_e;
-		type = pr_reg->pr_res_type;
-
-		if (!ignore_key) {
-			if (res_key != pr_reg->pr_res_key) {
-				pr_err("SPC-3 PR REGISTER: Received"
-					" res_key: 0x%016Lx does not match"
-					" existing SA REGISTER res_key:"
-					" 0x%016Lx\n", res_key,
-					pr_reg->pr_res_key);
-				core_scsi3_put_pr_reg(pr_reg);
-				cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-				return -EINVAL;
-			}
+		goto out_put_pr_reg;
+	}
+
+	/*
+	 * Locate the existing *pr_reg via struct se_node_acl pointers
+	 */
+	pr_reg = pr_reg_e;
+	type = pr_reg->pr_res_type;
+
+	if (!ignore_key) {
+		if (res_key != pr_reg->pr_res_key) {
+			pr_err("SPC-3 PR REGISTER: Received"
+				" res_key: 0x%016Lx does not match"
+				" existing SA REGISTER res_key:"
+				" 0x%016Lx\n", res_key,
+				pr_reg->pr_res_key);
+			ret = TCM_RESERVATION_CONFLICT;
+			goto out_put_pr_reg;
 		}
-		if (spec_i_pt) {
-			pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT"
-				" set while sa_res_key=0\n");
-			core_scsi3_put_pr_reg(pr_reg);
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			return -EINVAL;
+	}
+
+	if (spec_i_pt) {
+		pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT"
+			" set while sa_res_key=0\n");
+		ret = TCM_INVALID_PARAMETER_LIST;
+		goto out_put_pr_reg;
+	}
+
+	/*
+	 * An existing ALL_TG_PT=1 registration being released
+	 * must also set ALL_TG_PT=1 in the incoming PROUT.
+	 */
+	if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) {
+		pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1"
+			" registration exists, but ALL_TG_PT=1 bit not"
+			" present in received PROUT\n");
+		ret = TCM_INVALID_CDB_FIELD;
+		goto out_put_pr_reg;
+	}
+
+	/*
+	 * Allocate APTPL metadata buffer used for UNREGISTER ops
+	 */
+	if (aptpl) {
+		pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len,
+					GFP_KERNEL);
+		if (!pr_aptpl_buf) {
+			pr_err("Unable to allocate"
+				" pr_aptpl_buf\n");
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			goto out_put_pr_reg;
 		}
-		/*
-		 * An existing ALL_TG_PT=1 registration being released
-		 * must also set ALL_TG_PT=1 in the incoming PROUT.
-		 */
-		if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) {
-			pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1"
-				" registration exists, but ALL_TG_PT=1 bit not"
-				" present in received PROUT\n");
-			core_scsi3_put_pr_reg(pr_reg);
-			cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-			return -EINVAL;
+	}
+
+	/*
+	 * sa_res_key=0 Unregister Reservation Key for registered I_T
+	 * Nexus sa_res_key=1 Change Reservation Key for registered I_T
+	 * Nexus.
+	 */
+	if (!sa_res_key) {
+		pr_holder = core_scsi3_check_implict_release(
+				cmd->se_dev, pr_reg);
+		if (pr_holder < 0) {
+			kfree(pr_aptpl_buf);
+			ret = TCM_RESERVATION_CONFLICT;
+			goto out_put_pr_reg;
 		}
+
+		spin_lock(&pr_tmpl->registration_lock);
 		/*
-		 * Allocate APTPL metadata buffer used for UNREGISTER ops
+		 * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port
+		 * and matching pr_res_key.
 		 */
-		if (aptpl) {
-			pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len,
-						GFP_KERNEL);
-			if (!pr_aptpl_buf) {
-				pr_err("Unable to allocate"
-					" pr_aptpl_buf\n");
-				core_scsi3_put_pr_reg(pr_reg);
-				cmd->scsi_sense_reason =
-					TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-				return -EINVAL;
+		if (pr_reg->pr_reg_all_tg_pt) {
+			list_for_each_entry_safe(pr_reg_p, pr_reg_tmp,
+					&pr_tmpl->registration_list,
+					pr_reg_list) {
+
+				if (!pr_reg_p->pr_reg_all_tg_pt)
+					continue;
+				if (pr_reg_p->pr_res_key != res_key)
+					continue;
+				if (pr_reg == pr_reg_p)
+					continue;
+				if (strcmp(pr_reg->pr_reg_nacl->initiatorname,
+					   pr_reg_p->pr_reg_nacl->initiatorname))
+					continue;
+
+				__core_scsi3_free_registration(dev,
+						pr_reg_p, NULL, 0);
 			}
 		}
+
 		/*
-		 * sa_res_key=0 Unregister Reservation Key for registered I_T
-		 * Nexus sa_res_key=1 Change Reservation Key for registered I_T
-		 * Nexus.
+		 * Release the calling I_T Nexus registration now..
 		 */
-		if (!sa_res_key) {
-			pr_holder = core_scsi3_check_implict_release(
-					cmd->se_dev, pr_reg);
-			if (pr_holder < 0) {
-				kfree(pr_aptpl_buf);
-				core_scsi3_put_pr_reg(pr_reg);
-				cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-				return -EINVAL;
-			}
-
-			spin_lock(&pr_tmpl->registration_lock);
-			/*
-			 * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port
-			 * and matching pr_res_key.
-			 */
-			if (pr_reg->pr_reg_all_tg_pt) {
-				list_for_each_entry_safe(pr_reg_p, pr_reg_tmp,
-						&pr_tmpl->registration_list,
-						pr_reg_list) {
-
-					if (!pr_reg_p->pr_reg_all_tg_pt)
-						continue;
+		__core_scsi3_free_registration(cmd->se_dev, pr_reg, NULL, 1);
 
-					if (pr_reg_p->pr_res_key != res_key)
-						continue;
-
-					if (pr_reg == pr_reg_p)
-						continue;
-
-					if (strcmp(pr_reg->pr_reg_nacl->initiatorname,
-						   pr_reg_p->pr_reg_nacl->initiatorname))
-						continue;
-
-					__core_scsi3_free_registration(dev,
-							pr_reg_p, NULL, 0);
-				}
-			}
-			/*
-			 * Release the calling I_T Nexus registration now..
-			 */
-			__core_scsi3_free_registration(cmd->se_dev, pr_reg,
-							NULL, 1);
-			/*
-			 * From spc4r17, section 5.7.11.3 Unregistering
-			 *
-			 * If the persistent reservation is a registrants only
-			 * type, the device server shall establish a unit
-			 * attention condition for the initiator port associated
-			 * with every registered I_T nexus except for the I_T
-			 * nexus on which the PERSISTENT RESERVE OUT command was
-			 * received, with the additional sense code set to
-			 * RESERVATIONS RELEASED.
-			 */
-			if (pr_holder &&
-			   ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
-			    (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) {
-				list_for_each_entry(pr_reg_p,
-						&pr_tmpl->registration_list,
-						pr_reg_list) {
-
-					core_scsi3_ua_allocate(
-						pr_reg_p->pr_reg_nacl,
-						pr_reg_p->pr_res_mapped_lun,
-						0x2A,
-						ASCQ_2AH_RESERVATIONS_RELEASED);
-				}
+		/*
+		 * From spc4r17, section 5.7.11.3 Unregistering
+		 *
+		 * If the persistent reservation is a registrants only
+		 * type, the device server shall establish a unit
+		 * attention condition for the initiator port associated
+		 * with every registered I_T nexus except for the I_T
+		 * nexus on which the PERSISTENT RESERVE OUT command was
+		 * received, with the additional sense code set to
+		 * RESERVATIONS RELEASED.
+		 */
+		if (pr_holder &&
+		   (type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY ||
+		    type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY)) {
+			list_for_each_entry(pr_reg_p,
+					&pr_tmpl->registration_list,
+					pr_reg_list) {
+
+				core_scsi3_ua_allocate(
+					pr_reg_p->pr_reg_nacl,
+					pr_reg_p->pr_res_mapped_lun,
+					0x2A,
+					ASCQ_2AH_RESERVATIONS_RELEASED);
 			}
-			spin_unlock(&pr_tmpl->registration_lock);
+		}
+		spin_unlock(&pr_tmpl->registration_lock);
 
-			if (!aptpl) {
-				pr_tmpl->pr_aptpl_active = 0;
-				core_scsi3_update_and_write_aptpl(dev, NULL, 0);
-				pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
-						" for UNREGISTER\n");
-				return 0;
-			}
+		if (!aptpl) {
+			pr_tmpl->pr_aptpl_active = 0;
+			core_scsi3_update_and_write_aptpl(dev, NULL, 0);
+			pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
+					" for UNREGISTER\n");
+			return 0;
+		}
 
-			ret = core_scsi3_update_and_write_aptpl(dev,
-					&pr_aptpl_buf[0],
-					pr_tmpl->pr_aptpl_buf_len);
-			if (!ret) {
-				pr_tmpl->pr_aptpl_active = 1;
-				pr_debug("SPC-3 PR: Set APTPL Bit Activated"
-						" for UNREGISTER\n");
-			}
+		if (!core_scsi3_update_and_write_aptpl(dev, &pr_aptpl_buf[0],
+				pr_tmpl->pr_aptpl_buf_len)) {
+			pr_tmpl->pr_aptpl_active = 1;
+			pr_debug("SPC-3 PR: Set APTPL Bit Activated"
+					" for UNREGISTER\n");
+		}
 
-			kfree(pr_aptpl_buf);
-			return ret;
-		} else {
-			/*
-			 * Increment PRgeneration counter for struct se_device"
-			 * upon a successful REGISTER, see spc4r17 section 6.3.2
-			 * READ_KEYS service action.
-			 */
-			pr_reg->pr_res_generation = core_scsi3_pr_generation(
-							cmd->se_dev);
-			pr_reg->pr_res_key = sa_res_key;
-			pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation"
-				" Key for %s to: 0x%016Lx PRgeneration:"
-				" 0x%08x\n", cmd->se_tfo->get_fabric_name(),
-				(ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "",
-				pr_reg->pr_reg_nacl->initiatorname,
-				pr_reg->pr_res_key, pr_reg->pr_res_generation);
-
-			if (!aptpl) {
-				pr_tmpl->pr_aptpl_active = 0;
-				core_scsi3_update_and_write_aptpl(dev, NULL, 0);
-				core_scsi3_put_pr_reg(pr_reg);
-				pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
-						" for REGISTER\n");
-				return 0;
-			}
+		goto out_free_aptpl_buf;
+	}
 
-			ret = core_scsi3_update_and_write_aptpl(dev,
-					&pr_aptpl_buf[0],
-					pr_tmpl->pr_aptpl_buf_len);
-			if (!ret) {
-				pr_tmpl->pr_aptpl_active = 1;
-				pr_debug("SPC-3 PR: Set APTPL Bit Activated"
-						" for REGISTER\n");
-			}
+	/*
+	 * Increment PRgeneration counter for struct se_device"
+	 * upon a successful REGISTER, see spc4r17 section 6.3.2
+	 * READ_KEYS service action.
+	 */
+	pr_reg->pr_res_generation = core_scsi3_pr_generation(cmd->se_dev);
+	pr_reg->pr_res_key = sa_res_key;
+	pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation"
+		" Key for %s to: 0x%016Lx PRgeneration:"
+		" 0x%08x\n", cmd->se_tfo->get_fabric_name(),
+		(ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "",
+		pr_reg->pr_reg_nacl->initiatorname,
+		pr_reg->pr_res_key, pr_reg->pr_res_generation);
 
-			kfree(pr_aptpl_buf);
-			core_scsi3_put_pr_reg(pr_reg);
-		}
+	if (!aptpl) {
+		pr_tmpl->pr_aptpl_active = 0;
+		core_scsi3_update_and_write_aptpl(dev, NULL, 0);
+		pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
+				" for REGISTER\n");
+		ret = 0;
+		goto out_put_pr_reg;
 	}
-	return 0;
+
+	if (!core_scsi3_update_and_write_aptpl(dev, &pr_aptpl_buf[0],
+						pr_tmpl->pr_aptpl_buf_len)) {
+		pr_tmpl->pr_aptpl_active = 1;
+		pr_debug("SPC-3 PR: Set APTPL Bit Activated"
+			" for REGISTER\n");
+	}
+
+out_free_aptpl_buf:
+	kfree(pr_aptpl_buf);
+	ret = 0;
+out_put_pr_reg:
+	core_scsi3_put_pr_reg(pr_reg);
+	return ret;
 }
 
 unsigned char *core_scsi3_pr_dump_type(int type)
@@ -2424,26 +2341,23 @@ unsigned char *core_scsi3_pr_dump_type(int type)
 	return "Unknown SPC-3 PR Type";
 }
 
-static int core_scsi3_pro_reserve(
-	struct se_cmd *cmd,
-	struct se_device *dev,
-	int type,
-	int scope,
-	u64 res_key)
+static sense_reason_t
+core_scsi3_pro_reserve(struct se_cmd *cmd, int type, int scope, u64 res_key)
 {
+	struct se_device *dev = cmd->se_dev;
 	struct se_session *se_sess = cmd->se_sess;
 	struct se_lun *se_lun = cmd->se_lun;
 	struct t10_pr_registration *pr_reg, *pr_res_holder;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	char i_buf[PR_REG_ISID_ID_LEN];
-	int ret, prf_isid;
+	sense_reason_t ret;
+	int prf_isid;
 
 	memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 
 	if (!se_sess || !se_lun) {
 		pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * Locate the existing *pr_reg via struct se_node_acl pointers
@@ -2453,8 +2367,7 @@ static int core_scsi3_pro_reserve(
 	if (!pr_reg) {
 		pr_err("SPC-3 PR: Unable to locate"
 			" PR_REGISTERED *pr_reg for RESERVE\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * From spc4r17 Section 5.7.9: Reserving:
@@ -2469,9 +2382,8 @@ static int core_scsi3_pro_reserve(
 		pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx"
 			" does not match existing SA REGISTER res_key:"
 			" 0x%016Lx\n", res_key, pr_reg->pr_res_key);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
+		goto out_put_pr_reg;
 	}
 	/*
 	 * From spc4r17 Section 5.7.9: Reserving:
@@ -2485,9 +2397,8 @@ static int core_scsi3_pro_reserve(
 	 */
 	if (scope != PR_SCOPE_LU_SCOPE) {
 		pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
+		goto out_put_pr_reg;
 	}
 	/*
 	 * See if we have an existing PR reservation holder pointer at
@@ -2518,9 +2429,8 @@ static int core_scsi3_pro_reserve(
 				pr_res_holder->pr_reg_nacl->initiatorname);
 
 			spin_unlock(&dev->dev_reservation_lock);
-			core_scsi3_put_pr_reg(pr_reg);
-			cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-			return -EINVAL;
+			ret = TCM_RESERVATION_CONFLICT;
+			goto out_put_pr_reg;
 		}
 		/*
 		 * From spc4r17 Section 5.7.9: Reserving:
@@ -2542,9 +2452,8 @@ static int core_scsi3_pro_reserve(
 				pr_res_holder->pr_reg_nacl->initiatorname);
 
 			spin_unlock(&dev->dev_reservation_lock);
-			core_scsi3_put_pr_reg(pr_reg);
-			cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-			return -EINVAL;
+			ret = TCM_RESERVATION_CONFLICT;
+			goto out_put_pr_reg;
 		}
 		/*
 		 * From spc4r17 Section 5.7.9: Reserving:
@@ -2557,8 +2466,8 @@ static int core_scsi3_pro_reserve(
 		 * shall completethe command with GOOD status.
 		 */
 		spin_unlock(&dev->dev_reservation_lock);
-		core_scsi3_put_pr_reg(pr_reg);
-		return 0;
+		ret = 0;
+		goto out_put_pr_reg;
 	}
 	/*
 	 * Otherwise, our *pr_reg becomes the PR reservation holder for said
@@ -2582,27 +2491,24 @@ static int core_scsi3_pro_reserve(
 	spin_unlock(&dev->dev_reservation_lock);
 
 	if (pr_tmpl->pr_aptpl_active) {
-		ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+		if (!core_scsi3_update_and_write_aptpl(cmd->se_dev,
 				&pr_reg->pr_aptpl_buf[0],
-				pr_tmpl->pr_aptpl_buf_len);
-		if (!ret)
+				pr_tmpl->pr_aptpl_buf_len)) {
 			pr_debug("SPC-3 PR: Updated APTPL metadata"
 					" for RESERVE\n");
+		}
 	}
 
+	ret = 0;
+out_put_pr_reg:
 	core_scsi3_put_pr_reg(pr_reg);
-	return 0;
+	return ret;
 }
 
-static int core_scsi3_emulate_pro_reserve(
-	struct se_cmd *cmd,
-	int type,
-	int scope,
-	u64 res_key)
+static sense_reason_t
+core_scsi3_emulate_pro_reserve(struct se_cmd *cmd, int type, int scope,
+		u64 res_key)
 {
-	struct se_device *dev = cmd->se_dev;
-	int ret = 0;
-
 	switch (type) {
 	case PR_TYPE_WRITE_EXCLUSIVE:
 	case PR_TYPE_EXCLUSIVE_ACCESS:
@@ -2610,16 +2516,12 @@ static int core_scsi3_emulate_pro_reserve(
 	case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
 	case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
 	case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
-		ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key);
-		break;
+		return core_scsi3_pro_reserve(cmd, type, scope, res_key);
 	default:
 		pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:"
 			" 0x%02x\n", type);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
-
-	return ret;
 }
 
 /*
@@ -2657,23 +2559,21 @@ static void __core_scsi3_complete_pro_release(
 	pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0;
 }
 
-static int core_scsi3_emulate_pro_release(
-	struct se_cmd *cmd,
-	int type,
-	int scope,
-	u64 res_key)
+static sense_reason_t
+core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope,
+		u64 res_key)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_session *se_sess = cmd->se_sess;
 	struct se_lun *se_lun = cmd->se_lun;
 	struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
-	int ret, all_reg = 0;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
+	int all_reg = 0;
+	sense_reason_t ret = 0;
 
 	if (!se_sess || !se_lun) {
 		pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * Locate the existing *pr_reg via struct se_node_acl pointers
@@ -2682,8 +2582,7 @@ static int core_scsi3_emulate_pro_release(
 	if (!pr_reg) {
 		pr_err("SPC-3 PR: Unable to locate"
 			" PR_REGISTERED *pr_reg for RELEASE\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * From spc4r17 Section 5.7.11.2 Releasing:
@@ -2704,8 +2603,7 @@ static int core_scsi3_emulate_pro_release(
 		 * No persistent reservation, return GOOD status.
 		 */
 		spin_unlock(&dev->dev_reservation_lock);
-		core_scsi3_put_pr_reg(pr_reg);
-		return 0;
+		goto out_put_pr_reg;
 	}
 	if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
 	    (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
@@ -2718,9 +2616,9 @@ static int core_scsi3_emulate_pro_release(
 		 * persistent reservation holder. return GOOD status.
 		 */
 		spin_unlock(&dev->dev_reservation_lock);
-		core_scsi3_put_pr_reg(pr_reg);
-		return 0;
+		goto out_put_pr_reg;
 	}
+
 	/*
 	 * From spc4r17 Section 5.7.11.2 Releasing:
 	 *
@@ -2740,9 +2638,8 @@ static int core_scsi3_emulate_pro_release(
 			" does not match existing SA REGISTER res_key:"
 			" 0x%016Lx\n", res_key, pr_reg->pr_res_key);
 		spin_unlock(&dev->dev_reservation_lock);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
+		goto out_put_pr_reg;
 	}
 	/*
 	 * From spc4r17 Section 5.7.11.2 Releasing and above:
@@ -2763,9 +2660,8 @@ static int core_scsi3_emulate_pro_release(
 			pr_res_holder->pr_reg_nacl->initiatorname);
 
 		spin_unlock(&dev->dev_reservation_lock);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
+		goto out_put_pr_reg;
 	}
 	/*
 	 * In response to a persistent reservation release request from the
@@ -2818,25 +2714,23 @@ static int core_scsi3_emulate_pro_release(
 
 write_aptpl:
 	if (pr_tmpl->pr_aptpl_active) {
-		ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
-				&pr_reg->pr_aptpl_buf[0],
-				pr_tmpl->pr_aptpl_buf_len);
-		if (!ret)
+		if (!core_scsi3_update_and_write_aptpl(cmd->se_dev,
+			&pr_reg->pr_aptpl_buf[0], pr_tmpl->pr_aptpl_buf_len)) {
 			pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n");
+		}
 	}
-
+out_put_pr_reg:
 	core_scsi3_put_pr_reg(pr_reg);
-	return 0;
+	return ret;
 }
 
-static int core_scsi3_emulate_pro_clear(
-	struct se_cmd *cmd,
-	u64 res_key)
+static sense_reason_t
+core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_node_acl *pr_reg_nacl;
 	struct se_session *se_sess = cmd->se_sess;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
 	u32 pr_res_mapped_lun = 0;
 	int calling_it_nexus = 0;
@@ -2848,8 +2742,7 @@ static int core_scsi3_emulate_pro_clear(
 	if (!pr_reg_n) {
 		pr_err("SPC-3 PR: Unable to locate"
 			" PR_REGISTERED *pr_reg for CLEAR\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * From spc4r17 section 5.7.11.6, Clearing:
@@ -2868,8 +2761,7 @@ static int core_scsi3_emulate_pro_clear(
 			" existing SA REGISTER res_key:"
 			" 0x%016Lx\n", res_key, pr_reg_n->pr_res_key);
 		core_scsi3_put_pr_reg(pr_reg_n);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		return TCM_RESERVATION_CONFLICT;
 	}
 	/*
 	 * a) Release the persistent reservation, if any;
@@ -2993,28 +2885,22 @@ static void core_scsi3_release_preempt_and_abort(
 	}
 }
 
-static int core_scsi3_pro_preempt(
-	struct se_cmd *cmd,
-	int type,
-	int scope,
-	u64 res_key,
-	u64 sa_res_key,
-	int abort)
+static sense_reason_t
+core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key,
+		u64 sa_res_key, int abort)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_node_acl *pr_reg_nacl;
 	struct se_session *se_sess = cmd->se_sess;
 	LIST_HEAD(preempt_and_abort_list);
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	u32 pr_res_mapped_lun = 0;
 	int all_reg = 0, calling_it_nexus = 0, released_regs = 0;
-	int prh_type = 0, prh_scope = 0, ret;
+	int prh_type = 0, prh_scope = 0;
 
-	if (!se_sess) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
-	}
+	if (!se_sess)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
 	pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
 				se_sess);
@@ -3022,19 +2908,16 @@ static int core_scsi3_pro_preempt(
 		pr_err("SPC-3 PR: Unable to locate"
 			" PR_REGISTERED *pr_reg for PREEMPT%s\n",
 			(abort) ? "_AND_ABORT" : "");
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		return TCM_RESERVATION_CONFLICT;
 	}
 	if (pr_reg_n->pr_res_key != res_key) {
 		core_scsi3_put_pr_reg(pr_reg_n);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		return TCM_RESERVATION_CONFLICT;
 	}
 	if (scope != PR_SCOPE_LU_SCOPE) {
 		pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
 		core_scsi3_put_pr_reg(pr_reg_n);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
 
 	spin_lock(&dev->dev_reservation_lock);
@@ -3047,8 +2930,7 @@ static int core_scsi3_pro_preempt(
 	if (!all_reg && !sa_res_key) {
 		spin_unlock(&dev->dev_reservation_lock);
 		core_scsi3_put_pr_reg(pr_reg_n);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
 	/*
 	 * From spc4r17, section 5.7.11.4.4 Removing Registrations:
@@ -3142,8 +3024,7 @@ static int core_scsi3_pro_preempt(
 		if (!released_regs) {
 			spin_unlock(&dev->dev_reservation_lock);
 			core_scsi3_put_pr_reg(pr_reg_n);
-			cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-			return -EINVAL;
+			return TCM_RESERVATION_CONFLICT;
 		}
 		/*
 		 * For an existing all registrants type reservation
@@ -3162,13 +3043,13 @@ static int core_scsi3_pro_preempt(
 		spin_unlock(&dev->dev_reservation_lock);
 
 		if (pr_tmpl->pr_aptpl_active) {
-			ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+			if (!core_scsi3_update_and_write_aptpl(cmd->se_dev,
 					&pr_reg_n->pr_aptpl_buf[0],
-					pr_tmpl->pr_aptpl_buf_len);
-			if (!ret)
+					pr_tmpl->pr_aptpl_buf_len)) {
 				pr_debug("SPC-3 PR: Updated APTPL"
 					" metadata for  PREEMPT%s\n", (abort) ?
 					"_AND_ABORT" : "");
+			}
 		}
 
 		core_scsi3_put_pr_reg(pr_reg_n);
@@ -3298,12 +3179,12 @@ static int core_scsi3_pro_preempt(
 	}
 
 	if (pr_tmpl->pr_aptpl_active) {
-		ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+		if (!core_scsi3_update_and_write_aptpl(cmd->se_dev,
 				&pr_reg_n->pr_aptpl_buf[0],
-				pr_tmpl->pr_aptpl_buf_len);
-		if (!ret)
+				pr_tmpl->pr_aptpl_buf_len)) {
 			pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT"
-				"%s\n", (abort) ? "_AND_ABORT" : "");
+				"%s\n", abort ? "_AND_ABORT" : "");
+		}
 	}
 
 	core_scsi3_put_pr_reg(pr_reg_n);
@@ -3311,16 +3192,10 @@ static int core_scsi3_pro_preempt(
 	return 0;
 }
 
-static int core_scsi3_emulate_pro_preempt(
-	struct se_cmd *cmd,
-	int type,
-	int scope,
-	u64 res_key,
-	u64 sa_res_key,
-	int abort)
+static sense_reason_t
+core_scsi3_emulate_pro_preempt(struct se_cmd *cmd, int type, int scope,
+		u64 res_key, u64 sa_res_key, int abort)
 {
-	int ret = 0;
-
 	switch (type) {
 	case PR_TYPE_WRITE_EXCLUSIVE:
 	case PR_TYPE_EXCLUSIVE_ACCESS:
@@ -3328,26 +3203,19 @@ static int core_scsi3_emulate_pro_preempt(
 	case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
 	case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
 	case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
-		ret = core_scsi3_pro_preempt(cmd, type, scope,
-				res_key, sa_res_key, abort);
-		break;
+		return core_scsi3_pro_preempt(cmd, type, scope, res_key,
+					      sa_res_key, abort);
 	default:
 		pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s"
 			" Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
-
-	return ret;
 }
 
 
-static int core_scsi3_emulate_pro_register_and_move(
-	struct se_cmd *cmd,
-	u64 res_key,
-	u64 sa_res_key,
-	int aptpl,
-	int unreg)
+static sense_reason_t
+core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key,
+		u64 sa_res_key, int aptpl, int unreg)
 {
 	struct se_session *se_sess = cmd->se_sess;
 	struct se_device *dev = cmd->se_dev;
@@ -3358,20 +3226,21 @@ static int core_scsi3_emulate_pro_register_and_move(
 	struct se_portal_group *se_tpg, *dest_se_tpg = NULL;
 	struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
 	struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	unsigned char *buf;
 	unsigned char *initiator_str;
 	char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
 	u32 tid_len, tmp_tid_len;
-	int new_reg = 0, type, scope, ret, matching_iname, prf_isid;
+	int new_reg = 0, type, scope, matching_iname, prf_isid;
+	sense_reason_t ret;
 	unsigned short rtpi;
 	unsigned char proto_ident;
 
 	if (!se_sess || !se_lun) {
 		pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
+
 	memset(dest_iport, 0, 64);
 	memset(i_buf, 0, PR_REG_ISID_ID_LEN);
 	se_tpg = se_sess->se_tpg;
@@ -3387,8 +3256,7 @@ static int core_scsi3_emulate_pro_register_and_move(
 	if (!pr_reg) {
 		pr_err("SPC-3 PR: Unable to locate PR_REGISTERED"
 			" *pr_reg for REGISTER_AND_MOVE\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	/*
 	 * The provided reservation key much match the existing reservation key
@@ -3398,9 +3266,8 @@ static int core_scsi3_emulate_pro_register_and_move(
 		pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received"
 			" res_key: 0x%016Lx does not match existing SA REGISTER"
 			" res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
+		goto out_put_pr_reg;
 	}
 	/*
 	 * The service active reservation key needs to be non zero
@@ -3408,9 +3275,8 @@ static int core_scsi3_emulate_pro_register_and_move(
 	if (!sa_res_key) {
 		pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero"
 			" sa_res_key\n");
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
+		goto out_put_pr_reg;
 	}
 
 	/*
@@ -3419,6 +3285,11 @@ static int core_scsi3_emulate_pro_register_and_move(
 	 * information.
 	 */
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf) {
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		goto out_put_pr_reg;
+	}
+
 	rtpi = (buf[18] & 0xff) << 8;
 	rtpi |= buf[19] & 0xff;
 	tid_len = (buf[20] & 0xff) << 24;
@@ -3432,9 +3303,8 @@ static int core_scsi3_emulate_pro_register_and_move(
 		pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header"
 			" does not equal CDB data_length: %u\n", tid_len,
 			cmd->data_length);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
+		goto out_put_pr_reg;
 	}
 
 	spin_lock(&dev->se_port_lock);
@@ -3452,15 +3322,13 @@ static int core_scsi3_emulate_pro_register_and_move(
 		smp_mb__after_atomic_inc();
 		spin_unlock(&dev->se_port_lock);
 
-		ret = core_scsi3_tpg_depend_item(dest_se_tpg);
-		if (ret != 0) {
+		if (core_scsi3_tpg_depend_item(dest_se_tpg)) {
 			pr_err("core_scsi3_tpg_depend_item() failed"
 				" for dest_se_tpg\n");
 			atomic_dec(&dest_se_tpg->tpg_pr_ref_count);
 			smp_mb__after_atomic_dec();
-			core_scsi3_put_pr_reg(pr_reg);
-			cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-			return -EINVAL;
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			goto out_put_pr_reg;
 		}
 
 		spin_lock(&dev->se_port_lock);
@@ -3472,12 +3340,15 @@ static int core_scsi3_emulate_pro_register_and_move(
 		pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
 			" fabric ops from Relative Target Port Identifier:"
 			" %hu\n", rtpi);
-		core_scsi3_put_pr_reg(pr_reg);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		return -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
+		goto out_put_pr_reg;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf) {
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		goto out_put_pr_reg;
+	}
 	proto_ident = (buf[24] & 0x0f);
 
 	pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:"
@@ -3489,16 +3360,14 @@ static int core_scsi3_emulate_pro_register_and_move(
 			" from fabric: %s\n", proto_ident,
 			dest_tf_ops->get_fabric_proto_ident(dest_se_tpg),
 			dest_tf_ops->get_fabric_name());
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 	if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) {
 		pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not"
 			" containg a valid tpg_parse_pr_out_transport_id"
 			" function pointer\n");
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		ret = -EINVAL;
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 		goto out;
 	}
 	initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg,
@@ -3506,8 +3375,7 @@ static int core_scsi3_emulate_pro_register_and_move(
 	if (!initiator_str) {
 		pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
 			" initiator_str from Transport ID\n");
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 
@@ -3536,8 +3404,7 @@ static int core_scsi3_emulate_pro_register_and_move(
 		pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s"
 			" matches: %s on received I_T Nexus\n", initiator_str,
 			pr_reg_nacl->initiatorname);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 	if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) {
@@ -3545,8 +3412,7 @@ static int core_scsi3_emulate_pro_register_and_move(
 			" matches: %s %s on received I_T Nexus\n",
 			initiator_str, iport_ptr, pr_reg_nacl->initiatorname,
 			pr_reg->pr_reg_isid);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 after_iport_check:
@@ -3566,19 +3432,17 @@ after_iport_check:
 		pr_err("Unable to locate %s dest_node_acl for"
 			" TransportID%s\n", dest_tf_ops->get_fabric_name(),
 			initiator_str);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
-	ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
-	if (ret != 0) {
+
+	if (core_scsi3_nodeacl_depend_item(dest_node_acl)) {
 		pr_err("core_scsi3_nodeacl_depend_item() for"
 			" dest_node_acl\n");
 		atomic_dec(&dest_node_acl->acl_pr_ref_count);
 		smp_mb__after_atomic_dec();
 		dest_node_acl = NULL;
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 
@@ -3594,19 +3458,16 @@ after_iport_check:
 	if (!dest_se_deve) {
 		pr_err("Unable to locate %s dest_se_deve from RTPI:"
 			" %hu\n",  dest_tf_ops->get_fabric_name(), rtpi);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
+		ret = TCM_INVALID_PARAMETER_LIST;
 		goto out;
 	}
 
-	ret = core_scsi3_lunacl_depend_item(dest_se_deve);
-	if (ret < 0) {
+	if (core_scsi3_lunacl_depend_item(dest_se_deve)) {
 		pr_err("core_scsi3_lunacl_depend_item() failed\n");
 		atomic_dec(&dest_se_deve->pr_ref_count);
 		smp_mb__after_atomic_dec();
 		dest_se_deve = NULL;
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		ret = -EINVAL;
+		ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 		goto out;
 	}
 
@@ -3625,8 +3486,7 @@ after_iport_check:
 		pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation"
 			" currently held\n");
 		spin_unlock(&dev->dev_reservation_lock);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		ret = -EINVAL;
+		ret = TCM_INVALID_CDB_FIELD;
 		goto out;
 	}
 	/*
@@ -3639,8 +3499,7 @@ after_iport_check:
 		pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T"
 			" Nexus is not reservation holder\n");
 		spin_unlock(&dev->dev_reservation_lock);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		ret = -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
 		goto out;
 	}
 	/*
@@ -3658,8 +3517,7 @@ after_iport_check:
 			" reservation for type: %s\n",
 			core_scsi3_pr_dump_type(pr_res_holder->pr_res_type));
 		spin_unlock(&dev->dev_reservation_lock);
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		ret = -EINVAL;
+		ret = TCM_RESERVATION_CONFLICT;
 		goto out;
 	}
 	pr_res_nacl = pr_res_holder->pr_reg_nacl;
@@ -3691,13 +3549,11 @@ after_iport_check:
 	dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
 					iport_ptr);
 	if (!dest_pr_reg) {
-		ret = core_scsi3_alloc_registration(cmd->se_dev,
+		if (core_scsi3_alloc_registration(cmd->se_dev,
 				dest_node_acl, dest_se_deve, iport_ptr,
-				sa_res_key, 0, aptpl, 2, 1);
-		if (ret != 0) {
+				sa_res_key, 0, aptpl, 2, 1)) {
 			spin_unlock(&dev->dev_reservation_lock);
-			cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-			ret = -EINVAL;
+			ret = TCM_INVALID_PARAMETER_LIST;
 			goto out;
 		}
 		dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
@@ -3768,12 +3624,12 @@ after_iport_check:
 				" REGISTER_AND_MOVE\n");
 	} else {
 		pr_tmpl->pr_aptpl_active = 1;
-		ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
+		if (!core_scsi3_update_and_write_aptpl(cmd->se_dev,
 				&dest_pr_reg->pr_aptpl_buf[0],
-				pr_tmpl->pr_aptpl_buf_len);
-		if (!ret)
+				pr_tmpl->pr_aptpl_buf_len)) {
 			pr_debug("SPC-3 PR: Set APTPL Bit Activated for"
 					" REGISTER_AND_MOVE\n");
+		}
 	}
 
 	transport_kunmap_data_sg(cmd);
@@ -3788,6 +3644,8 @@ out:
 	if (dest_node_acl)
 		core_scsi3_nodeacl_undepend_item(dest_node_acl);
 	core_scsi3_tpg_undepend_item(dest_se_tpg);
+
+out_put_pr_reg:
 	core_scsi3_put_pr_reg(pr_reg);
 	return ret;
 }
@@ -3805,14 +3663,15 @@ static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
 /*
  * See spc4r17 section 6.14 Table 170
  */
-int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
+sense_reason_t
+target_scsi3_emulate_pr_out(struct se_cmd *cmd)
 {
 	unsigned char *cdb = &cmd->t_task_cdb[0];
 	unsigned char *buf;
 	u64 res_key, sa_res_key;
 	int sa, scope, type, aptpl;
 	int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
-	int ret;
+	sense_reason_t ret;
 
 	/*
 	 * Following spc2r20 5.5.1 Reservations overview:
@@ -3823,32 +3682,26 @@ int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
 	 * initiator or service action and shall terminate with a RESERVATION
 	 * CONFLICT status.
 	 */
-	if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
+	if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) {
 		pr_err("Received PERSISTENT_RESERVE CDB while legacy"
 			" SPC-2 reservation is held, returning"
 			" RESERVATION_CONFLICT\n");
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		ret = -EINVAL;
-		goto out;
+		return TCM_RESERVATION_CONFLICT;
 	}
 
 	/*
 	 * FIXME: A NULL struct se_session pointer means an this is not coming from
 	 * a $FABRIC_MOD's nexus, but from internal passthrough ops.
 	 */
-	if (!cmd->se_sess) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		ret = -EINVAL;
-		goto out;
-	}
+	if (!cmd->se_sess)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
 	if (cmd->data_length < 24) {
 		pr_warn("SPC-PR: Received PR OUT parameter list"
 			" length too small: %u\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
-		goto out;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
+
 	/*
 	 * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB)
 	 */
@@ -3857,6 +3710,9 @@ int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
 	type = (cdb[2] & 0x0f);
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
 	/*
 	 * From PERSISTENT_RESERVE_OUT parameter list (payload)
 	 */
@@ -3880,11 +3736,8 @@ int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
 	/*
 	 * SPEC_I_PT=1 is only valid for Service action: REGISTER
 	 */
-	if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) {
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
-		goto out;
-	}
+	if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER))
+		return TCM_INVALID_PARAMETER_LIST;
 
 	/*
 	 * From spc4r17 section 6.14:
@@ -3899,10 +3752,9 @@ int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
 	    (cmd->data_length != 24)) {
 		pr_warn("SPC-PR: Received PR OUT illegal parameter"
 			" list length: %u\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
-		ret = -EINVAL;
-		goto out;
+		return TCM_INVALID_PARAMETER_LIST;
 	}
+
 	/*
 	 * (core_scsi3_emulate_pro_* function parameters
 	 * are defined by spc4r17 Table 174:
@@ -3941,12 +3793,9 @@ int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
 	default:
 		pr_err("Unknown PERSISTENT_RESERVE_OUT service"
 			" action: 0x%02x\n", cdb[1] & 0x1f);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		ret = -EINVAL;
-		break;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
-out:
 	if (!ret)
 		target_complete_cmd(cmd, GOOD);
 	return ret;
@@ -3957,10 +3806,10 @@ out:
  *
  * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160
  */
-static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
+static sense_reason_t
+core_scsi3_pri_read_keys(struct se_cmd *cmd)
 {
-	struct se_device *se_dev = cmd->se_dev;
-	struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct t10_pr_registration *pr_reg;
 	unsigned char *buf;
 	u32 add_len = 0, off = 8;
@@ -3968,18 +3817,20 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
 	if (cmd->data_length < 8) {
 		pr_err("PRIN SA READ_KEYS SCSI Data Length: %u"
 			" too small\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
-	buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
-	buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
-	buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
-	buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
-	spin_lock(&su_dev->t10_pr.registration_lock);
-	list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
+	buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff);
+	buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff);
+	buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
+	buf[3] = (dev->t10_pr.pr_generation & 0xff);
+
+	spin_lock(&dev->t10_pr.registration_lock);
+	list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
 			pr_reg_list) {
 		/*
 		 * Check for overflow of 8byte PRI READ_KEYS payload and
@@ -3999,7 +3850,7 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
 
 		add_len += 8;
 	}
-	spin_unlock(&su_dev->t10_pr.registration_lock);
+	spin_unlock(&dev->t10_pr.registration_lock);
 
 	buf[4] = ((add_len >> 24) & 0xff);
 	buf[5] = ((add_len >> 16) & 0xff);
@@ -4016,10 +3867,10 @@ static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
  *
  * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162
  */
-static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
+static sense_reason_t
+core_scsi3_pri_read_reservation(struct se_cmd *cmd)
 {
-	struct se_device *se_dev = cmd->se_dev;
-	struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct t10_pr_registration *pr_reg;
 	unsigned char *buf;
 	u64 pr_res_key;
@@ -4028,18 +3879,20 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
 	if (cmd->data_length < 8) {
 		pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u"
 			" too small\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
-	buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
-	buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
-	buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
-	buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
-	spin_lock(&se_dev->dev_reservation_lock);
-	pr_reg = se_dev->dev_pr_res_holder;
+	buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff);
+	buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff);
+	buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
+	buf[3] = (dev->t10_pr.pr_generation & 0xff);
+
+	spin_lock(&dev->dev_reservation_lock);
+	pr_reg = dev->dev_pr_res_holder;
 	if (pr_reg) {
 		/*
 		 * Set the hardcoded Additional Length
@@ -4090,7 +3943,7 @@ static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
 	}
 
 err:
-	spin_unlock(&se_dev->dev_reservation_lock);
+	spin_unlock(&dev->dev_reservation_lock);
 	transport_kunmap_data_sg(cmd);
 
 	return 0;
@@ -4101,21 +3954,23 @@ err:
  *
  * See spc4r17 section 6.13.4 Table 165
  */
-static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
+static sense_reason_t
+core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
-	struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	unsigned char *buf;
 	u16 add_len = 8; /* Hardcoded to 8. */
 
 	if (cmd->data_length < 6) {
 		pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:"
 			" %u too small\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
 	buf[0] = ((add_len << 8) & 0xff);
 	buf[1] = (add_len & 0xff);
@@ -4157,14 +4012,14 @@ static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
  *
  * See spc4r17 section 6.13.5 Table 168 and 169
  */
-static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
+static sense_reason_t
+core_scsi3_pri_read_full_status(struct se_cmd *cmd)
 {
-	struct se_device *se_dev = cmd->se_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct se_node_acl *se_nacl;
-	struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
 	struct se_portal_group *se_tpg;
 	struct t10_pr_registration *pr_reg, *pr_reg_tmp;
-	struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr;
+	struct t10_reservation *pr_tmpl = &dev->t10_pr;
 	unsigned char *buf;
 	u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
 	u32 off = 8; /* off into first Full Status descriptor */
@@ -4173,16 +4028,17 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
 	if (cmd->data_length < 8) {
 		pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u"
 			" too small\n", cmd->data_length);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
 	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
-	buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
-	buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
-	buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
-	buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
+	buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff);
+	buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff);
+	buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff);
+	buf[3] = (dev->t10_pr.pr_generation & 0xff);
 
 	spin_lock(&pr_tmpl->registration_lock);
 	list_for_each_entry_safe(pr_reg, pr_reg_tmp,
@@ -4303,9 +4159,10 @@ static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
 	return 0;
 }
 
-int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
+sense_reason_t
+target_scsi3_emulate_pr_in(struct se_cmd *cmd)
 {
-	int ret;
+	sense_reason_t ret;
 
 	/*
 	 * Following spc2r20 5.5.1 Reservations overview:
@@ -4316,12 +4173,11 @@ int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
 	 * initiator or service action and shall terminate with a RESERVATION
 	 * CONFLICT status.
 	 */
-	if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
+	if (cmd->se_dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) {
 		pr_err("Received PERSISTENT_RESERVE CDB while legacy"
 			" SPC-2 reservation is held, returning"
 			" RESERVATION_CONFLICT\n");
-		cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-		return -EINVAL;
+		return TCM_RESERVATION_CONFLICT;
 	}
 
 	switch (cmd->t_task_cdb[1] & 0x1f) {
@@ -4340,9 +4196,7 @@ int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
 	default:
 		pr_err("Unknown PERSISTENT_RESERVE_IN service"
 			" action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f);
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		ret = -EINVAL;
-		break;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
 	if (!ret)
@@ -4350,56 +4204,25 @@ int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
 	return ret;
 }
 
-static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type)
-{
-	return 0;
-}
-
-static int core_pt_seq_non_holder(
-	struct se_cmd *cmd,
-	unsigned char *cdb,
-	u32 pr_reg_type)
+sense_reason_t
+target_check_reservation(struct se_cmd *cmd)
 {
-	return 0;
-}
+	struct se_device *dev = cmd->se_dev;
+	sense_reason_t ret;
 
-int core_setup_reservations(struct se_device *dev, int force_pt)
-{
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
-	struct t10_reservation *rest = &su_dev->t10_pr;
-	/*
-	 * If this device is from Target_Core_Mod/pSCSI, use the reservations
-	 * of the Underlying SCSI hardware.  In Linux/SCSI terms, this can
-	 * cause a problem because libata and some SATA RAID HBAs appear
-	 * under Linux/SCSI, but to emulate reservations themselves.
-	 */
-	if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
-	    !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) {
-		rest->res_type = SPC_PASSTHROUGH;
-		rest->pr_ops.t10_reservation_check = &core_pt_reservation_check;
-		rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder;
-		pr_debug("%s: Using SPC_PASSTHROUGH, no reservation"
-			" emulation\n", dev->transport->name);
+	if (!cmd->se_sess)
+		return 0;
+	if (dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)
+		return 0;
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 		return 0;
-	}
-	/*
-	 * If SPC-3 or above is reported by real or emulated struct se_device,
-	 * use emulated Persistent Reservations.
-	 */
-	if (dev->transport->get_device_rev(dev) >= SCSI_3) {
-		rest->res_type = SPC3_PERSISTENT_RESERVATIONS;
-		rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check;
-		rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder;
-		pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS"
-			" emulation\n", dev->transport->name);
-	} else {
-		rest->res_type = SPC2_RESERVATIONS;
-		rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check;
-		rest->pr_ops.t10_seq_non_holder =
-				&core_scsi2_reservation_seq_non_holder;
-		pr_debug("%s: Using SPC2_RESERVATIONS emulation\n",
-			dev->transport->name);
-	}
 
-	return 0;
+	spin_lock(&dev->dev_reservation_lock);
+	if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+		ret = target_scsi2_reservation_check(cmd);
+	else
+		ret = target_scsi3_pr_reservation_check(cmd);
+	spin_unlock(&dev->dev_reservation_lock);
+
+	return ret;
 }

drivers/target/target_core_pr.h

@@ -47,8 +47,8 @@ extern struct kmem_cache *t10_pr_reg_cache;
 
 extern int core_pr_dump_initiator_port(struct t10_pr_registration *,
 			char *, u32);
-extern int target_scsi2_reservation_release(struct se_cmd *);
-extern int target_scsi2_reservation_reserve(struct se_cmd *);
+extern sense_reason_t target_scsi2_reservation_release(struct se_cmd *);
+extern sense_reason_t target_scsi2_reservation_reserve(struct se_cmd *);
 extern int core_scsi3_alloc_aptpl_registration(
 			struct t10_reservation *, u64,
 			unsigned char *, unsigned char *, u32,
@@ -61,8 +61,8 @@ extern void core_scsi3_free_pr_reg_from_nacl(struct se_device *,
 extern void core_scsi3_free_all_registrations(struct se_device *);
 extern unsigned char *core_scsi3_pr_dump_type(int);
 
-extern int target_scsi3_emulate_pr_in(struct se_cmd *);
-extern int target_scsi3_emulate_pr_out(struct se_cmd *);
-extern int core_setup_reservations(struct se_device *, int);
+extern sense_reason_t target_scsi3_emulate_pr_in(struct se_cmd *);
+extern sense_reason_t target_scsi3_emulate_pr_out(struct se_cmd *);
+extern sense_reason_t target_check_reservation(struct se_cmd *);
 
 #endif /* TARGET_CORE_PR_H */

drivers/target/target_core_pscsi.c

@@ -3,10 +3,7 @@
  *
  * This file contains the generic target mode <-> Linux SCSI subsystem plugin.
  *
- * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2003-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -53,9 +50,14 @@
 
 #define ISPRINT(a)  ((a >= ' ') && (a <= '~'))
 
+static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
+{
+	return container_of(dev, struct pscsi_dev_virt, dev);
+}
+
 static struct se_subsystem_api pscsi_template;
 
-static int pscsi_execute_cmd(struct se_cmd *cmd);
+static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd);
 static void pscsi_req_done(struct request *, int);
 
 /*	pscsi_attach_hba():
@@ -219,7 +221,7 @@ pscsi_get_inquiry_vpd_serial(struct scsi_device *sdev, struct t10_wwn *wwn)
 
 	snprintf(&wwn->unit_serial[0], INQUIRY_VPD_SERIAL_LEN, "%s", &buf[4]);
 
-	wwn->t10_sub_dev->su_dev_flags |= SDF_FIRMWARE_VPD_UNIT_SERIAL;
+	wwn->t10_dev->dev_flags |= DF_FIRMWARE_VPD_UNIT_SERIAL;
 
 	kfree(buf);
 	return 0;
@@ -299,23 +301,13 @@ out:
 	kfree(buf);
 }
 
-/*	pscsi_add_device_to_list():
- *
- *
- */
-static struct se_device *pscsi_add_device_to_list(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	struct pscsi_dev_virt *pdv,
-	struct scsi_device *sd,
-	int dev_flags)
+static int pscsi_add_device_to_list(struct se_device *dev,
+		struct scsi_device *sd)
 {
-	struct se_device *dev;
-	struct se_dev_limits dev_limits;
-	struct request_queue *q;
-	struct queue_limits *limits;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
+	struct request_queue *q = sd->request_queue;
 
-	memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+	pdv->pdv_sd = sd;
 
 	if (!sd->queue_depth) {
 		sd->queue_depth = PSCSI_DEFAULT_QUEUEDEPTH;
@@ -324,54 +316,27 @@ static struct se_device *pscsi_add_device_to_list(
 			" queue_depth to %d\n", sd->channel, sd->id,
 				sd->lun, sd->queue_depth);
 	}
-	/*
-	 * Setup the local scope queue_limits from struct request_queue->limits
-	 * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
-	 */
-	q = sd->request_queue;
-	limits = &dev_limits.limits;
-	limits->logical_block_size = sd->sector_size;
-	limits->max_hw_sectors = min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q));
-	limits->max_sectors = min_t(int, sd->host->max_sectors, queue_max_sectors(q));
-	dev_limits.hw_queue_depth = sd->queue_depth;
-	dev_limits.queue_depth = sd->queue_depth;
-	/*
-	 * Setup our standard INQUIRY info into se_dev->t10_wwn
-	 */
-	pscsi_set_inquiry_info(sd, &se_dev->t10_wwn);
+
+	dev->dev_attrib.hw_block_size = sd->sector_size;
+	dev->dev_attrib.hw_max_sectors =
+		min_t(int, sd->host->max_sectors, queue_max_hw_sectors(q));
+	dev->dev_attrib.hw_queue_depth = sd->queue_depth;
 
 	/*
-	 * Set the pointer pdv->pdv_sd to from passed struct scsi_device,
-	 * which has already been referenced with Linux SCSI code with
-	 * scsi_device_get() in this file's pscsi_create_virtdevice().
-	 *
-	 * The passthrough operations called by the transport_add_device_*
-	 * function below will require this pointer to be set for passthroug
-	 *  ops.
-	 *
-	 * For the shutdown case in pscsi_free_device(), this struct
-	 * scsi_device  reference is released with Linux SCSI code
-	 * scsi_device_put() and the pdv->pdv_sd cleared.
+	 * Setup our standard INQUIRY info into se_dev->t10_wwn
 	 */
-	pdv->pdv_sd = sd;
-	dev = transport_add_device_to_core_hba(hba, &pscsi_template,
-				se_dev, dev_flags, pdv,
-				&dev_limits, NULL, NULL);
-	if (!dev) {
-		pdv->pdv_sd = NULL;
-		return NULL;
-	}
+	pscsi_set_inquiry_info(sd, &dev->t10_wwn);
 
 	/*
 	 * Locate VPD WWN Information used for various purposes within
 	 * the Storage Engine.
 	 */
-	if (!pscsi_get_inquiry_vpd_serial(sd, &se_dev->t10_wwn)) {
+	if (!pscsi_get_inquiry_vpd_serial(sd, &dev->t10_wwn)) {
 		/*
 		 * If VPD Unit Serial returned GOOD status, try
 		 * VPD Device Identification page (0x83).
 		 */
-		pscsi_get_inquiry_vpd_device_ident(sd, &se_dev->t10_wwn);
+		pscsi_get_inquiry_vpd_device_ident(sd, &dev->t10_wwn);
 	}
 
 	/*
@@ -379,10 +344,11 @@ static struct se_device *pscsi_add_device_to_list(
 	 */
 	if (sd->type == TYPE_TAPE)
 		pscsi_tape_read_blocksize(dev, sd);
-	return dev;
+	return 0;
 }
 
-static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name)
+static struct se_device *pscsi_alloc_device(struct se_hba *hba,
+		const char *name)
 {
 	struct pscsi_dev_virt *pdv;
 
@@ -391,139 +357,125 @@ static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name)
 		pr_err("Unable to allocate memory for struct pscsi_dev_virt\n");
 		return NULL;
 	}
-	pdv->pdv_se_hba = hba;
 
 	pr_debug("PSCSI: Allocated pdv: %p for %s\n", pdv, name);
-	return pdv;
+	return &pdv->dev;
 }
 
 /*
  * Called with struct Scsi_Host->host_lock called.
  */
-static struct se_device *pscsi_create_type_disk(
-	struct scsi_device *sd,
-	struct pscsi_dev_virt *pdv,
-	struct se_subsystem_dev *se_dev,
-	struct se_hba *hba)
+static int pscsi_create_type_disk(struct se_device *dev, struct scsi_device *sd)
 	__releases(sh->host_lock)
 {
-	struct se_device *dev;
-	struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
 	struct Scsi_Host *sh = sd->host;
 	struct block_device *bd;
-	u32 dev_flags = 0;
+	int ret;
 
 	if (scsi_device_get(sd)) {
 		pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
 			sh->host_no, sd->channel, sd->id, sd->lun);
 		spin_unlock_irq(sh->host_lock);
-		return NULL;
+		return -EIO;
 	}
 	spin_unlock_irq(sh->host_lock);
 	/*
 	 * Claim exclusive struct block_device access to struct scsi_device
 	 * for TYPE_DISK using supplied udev_path
 	 */
-	bd = blkdev_get_by_path(se_dev->se_dev_udev_path,
+	bd = blkdev_get_by_path(dev->udev_path,
 				FMODE_WRITE|FMODE_READ|FMODE_EXCL, pdv);
 	if (IS_ERR(bd)) {
 		pr_err("pSCSI: blkdev_get_by_path() failed\n");
 		scsi_device_put(sd);
-		return NULL;
+		return PTR_ERR(bd);
 	}
 	pdv->pdv_bd = bd;
 
-	dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
-	if (!dev) {
+	ret = pscsi_add_device_to_list(dev, sd);
+	if (ret) {
 		blkdev_put(pdv->pdv_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
 		scsi_device_put(sd);
-		return NULL;
+		return ret;
 	}
+
 	pr_debug("CORE_PSCSI[%d] - Added TYPE_DISK for %d:%d:%d:%d\n",
 		phv->phv_host_id, sh->host_no, sd->channel, sd->id, sd->lun);
-
-	return dev;
+	return 0;
 }
 
 /*
  * Called with struct Scsi_Host->host_lock called.
  */
-static struct se_device *pscsi_create_type_rom(
-	struct scsi_device *sd,
-	struct pscsi_dev_virt *pdv,
-	struct se_subsystem_dev *se_dev,
-	struct se_hba *hba)
+static int pscsi_create_type_rom(struct se_device *dev, struct scsi_device *sd)
 	__releases(sh->host_lock)
 {
-	struct se_device *dev;
-	struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
 	struct Scsi_Host *sh = sd->host;
-	u32 dev_flags = 0;
+	int ret;
 
 	if (scsi_device_get(sd)) {
 		pr_err("scsi_device_get() failed for %d:%d:%d:%d\n",
 			sh->host_no, sd->channel, sd->id, sd->lun);
 		spin_unlock_irq(sh->host_lock);
-		return NULL;
+		return -EIO;
 	}
 	spin_unlock_irq(sh->host_lock);
 
-	dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
-	if (!dev) {
+	ret = pscsi_add_device_to_list(dev, sd);
+	if (ret) {
 		scsi_device_put(sd);
-		return NULL;
+		return ret;
 	}
 	pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
 		phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
 		sd->channel, sd->id, sd->lun);
 
-	return dev;
+	return 0;
 }
 
 /*
- *Called with struct Scsi_Host->host_lock called.
+ * Called with struct Scsi_Host->host_lock called.
  */
-static struct se_device *pscsi_create_type_other(
-	struct scsi_device *sd,
-	struct pscsi_dev_virt *pdv,
-	struct se_subsystem_dev *se_dev,
-	struct se_hba *hba)
+static int pscsi_create_type_other(struct se_device *dev,
+		struct scsi_device *sd)
 	__releases(sh->host_lock)
 {
-	struct se_device *dev;
-	struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
 	struct Scsi_Host *sh = sd->host;
-	u32 dev_flags = 0;
+	int ret;
 
 	spin_unlock_irq(sh->host_lock);
-	dev = pscsi_add_device_to_list(hba, se_dev, pdv, sd, dev_flags);
-	if (!dev)
-		return NULL;
+	ret = pscsi_add_device_to_list(dev, sd);
+	if (ret)
+		return ret;
 
 	pr_debug("CORE_PSCSI[%d] - Added Type: %s for %d:%d:%d:%d\n",
 		phv->phv_host_id, scsi_device_type(sd->type), sh->host_no,
 		sd->channel, sd->id, sd->lun);
-
-	return dev;
+	return 0;
 }
 
-static struct se_device *pscsi_create_virtdevice(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	void *p)
+static int pscsi_configure_device(struct se_device *dev)
 {
-	struct pscsi_dev_virt *pdv = p;
-	struct se_device *dev;
+	struct se_hba *hba = dev->se_hba;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
 	struct scsi_device *sd;
-	struct pscsi_hba_virt *phv = hba->hba_ptr;
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
 	struct Scsi_Host *sh = phv->phv_lld_host;
 	int legacy_mode_enable = 0;
+	int ret;
 
-	if (!pdv) {
-		pr_err("Unable to locate struct pscsi_dev_virt"
-				" parameter\n");
-		return ERR_PTR(-EINVAL);
+	if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
+	    !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
+	    !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
+		pr_err("Missing scsi_channel_id=, scsi_target_id= and"
+			" scsi_lun_id= parameters\n");
+		return -EINVAL;
 	}
+
 	/*
 	 * If not running in PHV_LLD_SCSI_HOST_NO mode, locate the
 	 * struct Scsi_Host we will need to bring the TCM/pSCSI object online
@@ -532,16 +484,16 @@ static struct se_device *pscsi_create_virtdevice(
 		if (phv->phv_mode == PHV_LLD_SCSI_HOST_NO) {
 			pr_err("pSCSI: Unable to locate struct"
 				" Scsi_Host for PHV_LLD_SCSI_HOST_NO\n");
-			return ERR_PTR(-ENODEV);
+			return -ENODEV;
 		}
 		/*
 		 * For the newer PHV_VIRTUAL_HOST_ID struct scsi_device
 		 * reference, we enforce that udev_path has been set
 		 */
-		if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) {
+		if (!(dev->dev_flags & DF_USING_UDEV_PATH)) {
 			pr_err("pSCSI: udev_path attribute has not"
 				" been set before ENABLE=1\n");
-			return ERR_PTR(-EINVAL);
+			return -EINVAL;
 		}
 		/*
 		 * If no scsi_host_id= was passed for PHV_VIRTUAL_HOST_ID,
@@ -549,17 +501,14 @@ static struct se_device *pscsi_create_virtdevice(
 		 * and enable for PHV_LLD_SCSI_HOST_NO mode.
 		 */
 		if (!(pdv->pdv_flags & PDF_HAS_VIRT_HOST_ID)) {
-			spin_lock(&hba->device_lock);
-			if (!list_empty(&hba->hba_dev_list)) {
+			if (hba->dev_count) {
 				pr_err("pSCSI: Unable to set hba_mode"
 					" with active devices\n");
-				spin_unlock(&hba->device_lock);
-				return ERR_PTR(-EEXIST);
+				return -EEXIST;
 			}
-			spin_unlock(&hba->device_lock);
 
 			if (pscsi_pmode_enable_hba(hba, 1) != 1)
-				return ERR_PTR(-ENODEV);
+				return -ENODEV;
 
 			legacy_mode_enable = 1;
 			hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
@@ -569,14 +518,14 @@ static struct se_device *pscsi_create_virtdevice(
 			if (IS_ERR(sh)) {
 				pr_err("pSCSI: Unable to locate"
 					" pdv_host_id: %d\n", pdv->pdv_host_id);
-				return ERR_CAST(sh);
+				return PTR_ERR(sh);
 			}
 		}
 	} else {
 		if (phv->phv_mode == PHV_VIRTUAL_HOST_ID) {
 			pr_err("pSCSI: PHV_VIRTUAL_HOST_ID set while"
 				" struct Scsi_Host exists\n");
-			return ERR_PTR(-EEXIST);
+			return -EEXIST;
 		}
 	}
 
@@ -593,17 +542,17 @@ static struct se_device *pscsi_create_virtdevice(
 		 */
 		switch (sd->type) {
 		case TYPE_DISK:
-			dev = pscsi_create_type_disk(sd, pdv, se_dev, hba);
+			ret = pscsi_create_type_disk(dev, sd);
 			break;
 		case TYPE_ROM:
-			dev = pscsi_create_type_rom(sd, pdv, se_dev, hba);
+			ret = pscsi_create_type_rom(dev, sd);
 			break;
 		default:
-			dev = pscsi_create_type_other(sd, pdv, se_dev, hba);
+			ret = pscsi_create_type_other(dev, sd);
 			break;
 		}
 
-		if (!dev) {
+		if (ret) {
 			if (phv->phv_mode == PHV_VIRTUAL_HOST_ID)
 				scsi_host_put(sh);
 			else if (legacy_mode_enable) {
@@ -611,9 +560,9 @@ static struct se_device *pscsi_create_virtdevice(
 				hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
 			}
 			pdv->pdv_sd = NULL;
-			return ERR_PTR(-ENODEV);
+			return ret;
 		}
-		return dev;
+		return 0;
 	}
 	spin_unlock_irq(sh->host_lock);
 
@@ -627,17 +576,13 @@ static struct se_device *pscsi_create_virtdevice(
 		hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
 	}
 
-	return ERR_PTR(-ENODEV);
+	return -ENODEV;
 }
 
-/*	pscsi_free_device(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static void pscsi_free_device(void *p)
+static void pscsi_free_device(struct se_device *dev)
 {
-	struct pscsi_dev_virt *pdv = p;
-	struct pscsi_hba_virt *phv = pdv->pdv_se_hba->hba_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
 	struct scsi_device *sd = pdv->pdv_sd;
 
 	if (sd) {
@@ -670,7 +615,7 @@ static void pscsi_free_device(void *p)
 static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
 				     unsigned char *sense_buffer)
 {
-	struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
 	struct scsi_device *sd = pdv->pdv_sd;
 	int result;
 	struct pscsi_plugin_task *pt = cmd->priv;
@@ -694,7 +639,11 @@ static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
 	if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
 	     (status_byte(result) << 1) == SAM_STAT_GOOD) {
 		if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) {
-			unsigned char *buf = transport_kmap_data_sg(cmd);
+			unsigned char *buf;
+
+			buf = transport_kmap_data_sg(cmd);
+			if (!buf)
+				; /* XXX: TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE */
 
 			if (cdb[0] == MODE_SENSE_10) {
 				if (!(buf[3] & 0x80))
@@ -770,13 +719,11 @@ static match_table_t tokens = {
 	{Opt_err, NULL}
 };
 
-static ssize_t pscsi_set_configfs_dev_params(struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	const char *page,
-	ssize_t count)
+static ssize_t pscsi_set_configfs_dev_params(struct se_device *dev,
+		const char *page, ssize_t count)
 {
-	struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
-	struct pscsi_hba_virt *phv = hba->hba_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
 	char *orig, *ptr, *opts;
 	substring_t args[MAX_OPT_ARGS];
 	int ret = 0, arg, token;
@@ -841,29 +788,10 @@ out:
 	return (!ret) ? count : ret;
 }
 
-static ssize_t pscsi_check_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev)
+static ssize_t pscsi_show_configfs_dev_params(struct se_device *dev, char *b)
 {
-	struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
-
-	if (!(pdv->pdv_flags & PDF_HAS_CHANNEL_ID) ||
-	    !(pdv->pdv_flags & PDF_HAS_TARGET_ID) ||
-	    !(pdv->pdv_flags & PDF_HAS_LUN_ID)) {
-		pr_err("Missing scsi_channel_id=, scsi_target_id= and"
-			" scsi_lun_id= parameters\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static ssize_t pscsi_show_configfs_dev_params(struct se_hba *hba,
-					      struct se_subsystem_dev *se_dev,
-					      char *b)
-{
-	struct pscsi_hba_virt *phv = hba->hba_ptr;
-        struct pscsi_dev_virt *pdv = se_dev->se_dev_su_ptr;
+	struct pscsi_hba_virt *phv = dev->se_hba->hba_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
 	struct scsi_device *sd = pdv->pdv_sd;
 	unsigned char host_id[16];
 	ssize_t bl;
@@ -929,11 +857,11 @@ static inline struct bio *pscsi_get_bio(int sg_num)
 	return bio;
 }
 
-static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl,
-		u32 sgl_nents, enum dma_data_direction data_direction,
-		struct bio **hbio)
+static sense_reason_t
+pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
+		enum dma_data_direction data_direction, struct bio **hbio)
 {
-	struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
 	struct bio *bio = NULL, *tbio = NULL;
 	struct page *page;
 	struct scatterlist *sg;
@@ -1019,7 +947,7 @@ static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl,
 		}
 	}
 
-	return sgl_nents;
+	return 0;
 fail:
 	while (*hbio) {
 		bio = *hbio;
@@ -1027,8 +955,7 @@ fail:
 		bio->bi_next = NULL;
 		bio_endio(bio, 0);	/* XXX: should be error */
 	}
-	cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-	return -ENOMEM;
+	return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 }
 
 /*
@@ -1055,17 +982,13 @@ static inline void pscsi_clear_cdb_lun(unsigned char *cdb)
 	}
 }
 
-static int pscsi_parse_cdb(struct se_cmd *cmd)
+static sense_reason_t
+pscsi_parse_cdb(struct se_cmd *cmd)
 {
 	unsigned char *cdb = cmd->t_task_cdb;
-	unsigned int dummy_size;
-	int ret;
 
-	if (cmd->se_cmd_flags & SCF_BIDI) {
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-		return -EINVAL;
-	}
+	if (cmd->se_cmd_flags & SCF_BIDI)
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
 
 	pscsi_clear_cdb_lun(cdb);
 
@@ -1076,10 +999,8 @@ static int pscsi_parse_cdb(struct se_cmd *cmd)
 	 */
 	switch (cdb[0]) {
 	case REPORT_LUNS:
-		ret = spc_parse_cdb(cmd, &dummy_size);
-		if (ret)
-			return ret;
-		break;
+		cmd->execute_cmd = spc_emulate_report_luns;
+		return 0;
 	case READ_6:
 	case READ_10:
 	case READ_12:
@@ -1093,22 +1014,21 @@ static int pscsi_parse_cdb(struct se_cmd *cmd)
 		/* FALLTHROUGH*/
 	default:
 		cmd->execute_cmd = pscsi_execute_cmd;
-		break;
+		return 0;
 	}
-
-	return 0;
 }
 
-static int pscsi_execute_cmd(struct se_cmd *cmd)
+static sense_reason_t
+pscsi_execute_cmd(struct se_cmd *cmd)
 {
 	struct scatterlist *sgl = cmd->t_data_sg;
 	u32 sgl_nents = cmd->t_data_nents;
 	enum dma_data_direction data_direction = cmd->data_direction;
-	struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
 	struct pscsi_plugin_task *pt;
 	struct request *req;
 	struct bio *hbio;
-	int ret;
+	sense_reason_t ret;
 
 	/*
 	 * Dynamically alloc cdb space, since it may be larger than
@@ -1116,8 +1036,7 @@ static int pscsi_execute_cmd(struct se_cmd *cmd)
 	 */
 	pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL);
 	if (!pt) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-		return -ENOMEM;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 	cmd->priv = pt;
 
@@ -1131,24 +1050,21 @@ static int pscsi_execute_cmd(struct se_cmd *cmd)
 		if (!req || IS_ERR(req)) {
 			pr_err("PSCSI: blk_get_request() failed: %ld\n",
 					req ? IS_ERR(req) : -ENOMEM);
-			cmd->scsi_sense_reason =
-				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 			goto fail;
 		}
 	} else {
 		BUG_ON(!cmd->data_length);
 
 		ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio);
-		if (ret < 0) {
-			cmd->scsi_sense_reason =
-				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		if (ret)
 			goto fail;
-		}
 
 		req = blk_make_request(pdv->pdv_sd->request_queue, hbio,
 				       GFP_KERNEL);
 		if (IS_ERR(req)) {
 			pr_err("pSCSI: blk_make_request() failed\n");
+			ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 			goto fail_free_bio;
 		}
 	}
@@ -1179,22 +1095,10 @@ fail_free_bio:
 		bio->bi_next = NULL;
 		bio_endio(bio, 0);	/* XXX: should be error */
 	}
-	cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 fail:
 	kfree(pt);
-	return -ENOMEM;
-}
-
-/*	pscsi_get_device_rev():
- *
- *
- */
-static u32 pscsi_get_device_rev(struct se_device *dev)
-{
-	struct pscsi_dev_virt *pdv = dev->dev_ptr;
-	struct scsi_device *sd = pdv->pdv_sd;
-
-	return (sd->scsi_level - 1) ? sd->scsi_level - 1 : 1;
+	return ret;
 }
 
 /*	pscsi_get_device_type():
@@ -1203,7 +1107,7 @@ static u32 pscsi_get_device_rev(struct se_device *dev)
  */
 static u32 pscsi_get_device_type(struct se_device *dev)
 {
-	struct pscsi_dev_virt *pdv = dev->dev_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
 	struct scsi_device *sd = pdv->pdv_sd;
 
 	return sd->type;
@@ -1211,7 +1115,7 @@ static u32 pscsi_get_device_type(struct se_device *dev)
 
 static sector_t pscsi_get_blocks(struct se_device *dev)
 {
-	struct pscsi_dev_virt *pdv = dev->dev_ptr;
+	struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
 
 	if (pdv->pdv_bd && pdv->pdv_bd->bd_part)
 		return pdv->pdv_bd->bd_part->nr_sects;
@@ -1243,7 +1147,6 @@ static void pscsi_req_done(struct request *req, int uptodate)
 		pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
 			" 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
 			pt->pscsi_result);
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
 		target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
 		break;
 	}
@@ -1259,15 +1162,13 @@ static struct se_subsystem_api pscsi_template = {
 	.attach_hba		= pscsi_attach_hba,
 	.detach_hba		= pscsi_detach_hba,
 	.pmode_enable_hba	= pscsi_pmode_enable_hba,
-	.allocate_virtdevice	= pscsi_allocate_virtdevice,
-	.create_virtdevice	= pscsi_create_virtdevice,
+	.alloc_device		= pscsi_alloc_device,
+	.configure_device	= pscsi_configure_device,
 	.free_device		= pscsi_free_device,
 	.transport_complete	= pscsi_transport_complete,
 	.parse_cdb		= pscsi_parse_cdb,
-	.check_configfs_dev_params = pscsi_check_configfs_dev_params,
 	.set_configfs_dev_params = pscsi_set_configfs_dev_params,
 	.show_configfs_dev_params = pscsi_show_configfs_dev_params,
-	.get_device_rev		= pscsi_get_device_rev,
 	.get_device_type	= pscsi_get_device_type,
 	.get_blocks		= pscsi_get_blocks,
 };

drivers/target/target_core_pscsi.h

@@ -37,6 +37,7 @@ struct pscsi_plugin_task {
 #define PDF_HAS_VIRT_HOST_ID	0x20
 
 struct pscsi_dev_virt {
+	struct se_device dev;
 	int	pdv_flags;
 	int	pdv_host_id;
 	int	pdv_channel_id;
@@ -44,7 +45,6 @@ struct pscsi_dev_virt {
 	int	pdv_lun_id;
 	struct block_device *pdv_bd;
 	struct scsi_device *pdv_sd;
-	struct se_hba *pdv_se_hba;
 } ____cacheline_aligned;
 
 typedef enum phv_modes {

drivers/target/target_core_rd.c

@@ -4,10 +4,7 @@
  * This file contains the Storage Engine <-> Ramdisk transport
  * specific functions.
  *
- * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2003-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -41,7 +38,10 @@
 
 #include "target_core_rd.h"
 
-static struct se_subsystem_api rd_mcp_template;
+static inline struct rd_dev *RD_DEV(struct se_device *dev)
+{
+	return container_of(dev, struct rd_dev, dev);
+}
 
 /*	rd_attach_hba(): (Part of se_subsystem_api_t template)
  *
@@ -196,7 +196,7 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
 	return 0;
 }
 
-static void *rd_allocate_virtdevice(struct se_hba *hba, const char *name)
+static struct se_device *rd_alloc_device(struct se_hba *hba, const char *name)
 {
 	struct rd_dev *rd_dev;
 	struct rd_host *rd_host = hba->hba_ptr;
@@ -209,39 +209,27 @@ static void *rd_allocate_virtdevice(struct se_hba *hba, const char *name)
 
 	rd_dev->rd_host = rd_host;
 
-	return rd_dev;
+	return &rd_dev->dev;
 }
 
-static struct se_device *rd_create_virtdevice(struct se_hba *hba,
-		struct se_subsystem_dev *se_dev, void *p)
+static int rd_configure_device(struct se_device *dev)
 {
-	struct se_device *dev;
-	struct se_dev_limits dev_limits;
-	struct rd_dev *rd_dev = p;
-	struct rd_host *rd_host = hba->hba_ptr;
-	int dev_flags = 0, ret;
-	char prod[16], rev[4];
+	struct rd_dev *rd_dev = RD_DEV(dev);
+	struct rd_host *rd_host = dev->se_hba->hba_ptr;
+	int ret;
 
-	memset(&dev_limits, 0, sizeof(struct se_dev_limits));
+	if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
+		pr_debug("Missing rd_pages= parameter\n");
+		return -EINVAL;
+	}
 
 	ret = rd_build_device_space(rd_dev);
 	if (ret < 0)
 		goto fail;
 
-	snprintf(prod, 16, "RAMDISK-MCP");
-	snprintf(rev, 4, "%s", RD_MCP_VERSION);
-
-	dev_limits.limits.logical_block_size = RD_BLOCKSIZE;
-	dev_limits.limits.max_hw_sectors = UINT_MAX;
-	dev_limits.limits.max_sectors = UINT_MAX;
-	dev_limits.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
-	dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH;
-
-	dev = transport_add_device_to_core_hba(hba,
-			&rd_mcp_template, se_dev, dev_flags, rd_dev,
-			&dev_limits, prod, rev);
-	if (!dev)
-		goto fail;
+	dev->dev_attrib.hw_block_size = RD_BLOCKSIZE;
+	dev->dev_attrib.hw_max_sectors = UINT_MAX;
+	dev->dev_attrib.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH;
 
 	rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
 
@@ -251,16 +239,16 @@ static struct se_device *rd_create_virtdevice(struct se_hba *hba,
 		rd_dev->sg_table_count,
 		(unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
 
-	return dev;
+	return 0;
 
 fail:
 	rd_release_device_space(rd_dev);
-	return ERR_PTR(ret);
+	return ret;
 }
 
-static void rd_free_device(void *p)
+static void rd_free_device(struct se_device *dev)
 {
-	struct rd_dev *rd_dev = p;
+	struct rd_dev *rd_dev = RD_DEV(dev);
 
 	rd_release_device_space(rd_dev);
 	kfree(rd_dev);
@@ -284,13 +272,14 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
 	return NULL;
 }
 
-static int rd_execute_rw(struct se_cmd *cmd)
+static sense_reason_t
+rd_execute_rw(struct se_cmd *cmd)
 {
 	struct scatterlist *sgl = cmd->t_data_sg;
 	u32 sgl_nents = cmd->t_data_nents;
 	enum dma_data_direction data_direction = cmd->data_direction;
 	struct se_device *se_dev = cmd->se_dev;
-	struct rd_dev *dev = se_dev->dev_ptr;
+	struct rd_dev *dev = RD_DEV(se_dev);
 	struct rd_dev_sg_table *table;
 	struct scatterlist *rd_sg;
 	struct sg_mapping_iter m;
@@ -300,14 +289,14 @@ static int rd_execute_rw(struct se_cmd *cmd)
 	u32 src_len;
 	u64 tmp;
 
-	tmp = cmd->t_task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size;
+	tmp = cmd->t_task_lba * se_dev->dev_attrib.block_size;
 	rd_offset = do_div(tmp, PAGE_SIZE);
 	rd_page = tmp;
 	rd_size = cmd->data_length;
 
 	table = rd_get_sg_table(dev, rd_page);
 	if (!table)
-		return -EINVAL;
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
 	rd_sg = &table->sg_table[rd_page - table->page_start_offset];
 
@@ -357,7 +346,7 @@ static int rd_execute_rw(struct se_cmd *cmd)
 		table = rd_get_sg_table(dev, rd_page);
 		if (!table) {
 			sg_miter_stop(&m);
-			return -EINVAL;
+			return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 		}
 
 		/* since we increment, the first sg entry is correct */
@@ -378,13 +367,10 @@ static match_table_t tokens = {
 	{Opt_err, NULL}
 };
 
-static ssize_t rd_set_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	const char *page,
-	ssize_t count)
+static ssize_t rd_set_configfs_dev_params(struct se_device *dev,
+		const char *page, ssize_t count)
 {
-	struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+	struct rd_dev *rd_dev = RD_DEV(dev);
 	char *orig, *ptr, *opts;
 	substring_t args[MAX_OPT_ARGS];
 	int ret = 0, arg, token;
@@ -417,24 +403,10 @@ static ssize_t rd_set_configfs_dev_params(
 	return (!ret) ? count : ret;
 }
 
-static ssize_t rd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
+static ssize_t rd_show_configfs_dev_params(struct se_device *dev, char *b)
 {
-	struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
+	struct rd_dev *rd_dev = RD_DEV(dev);
 
-	if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
-		pr_debug("Missing rd_pages= parameter\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static ssize_t rd_show_configfs_dev_params(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	char *b)
-{
-	struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
 	ssize_t bl = sprintf(b, "TCM RamDisk ID: %u  RamDisk Makeup: rd_mcp\n",
 			rd_dev->rd_dev_id);
 	bl += sprintf(b + bl, "        PAGES/PAGE_SIZE: %u*%lu"
@@ -443,48 +415,40 @@ static ssize_t rd_show_configfs_dev_params(
 	return bl;
 }
 
-static u32 rd_get_device_rev(struct se_device *dev)
-{
-	return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
-}
-
-static u32 rd_get_device_type(struct se_device *dev)
-{
-	return TYPE_DISK;
-}
-
 static sector_t rd_get_blocks(struct se_device *dev)
 {
-	struct rd_dev *rd_dev = dev->dev_ptr;
+	struct rd_dev *rd_dev = RD_DEV(dev);
+
 	unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) /
-			dev->se_sub_dev->se_dev_attrib.block_size) - 1;
+			dev->dev_attrib.block_size) - 1;
 
 	return blocks_long;
 }
 
-static struct spc_ops rd_spc_ops = {
+static struct sbc_ops rd_sbc_ops = {
 	.execute_rw		= rd_execute_rw,
 };
 
-static int rd_parse_cdb(struct se_cmd *cmd)
+static sense_reason_t
+rd_parse_cdb(struct se_cmd *cmd)
 {
-	return sbc_parse_cdb(cmd, &rd_spc_ops);
+	return sbc_parse_cdb(cmd, &rd_sbc_ops);
 }
 
 static struct se_subsystem_api rd_mcp_template = {
 	.name			= "rd_mcp",
+	.inquiry_prod		= "RAMDISK-MCP",
+	.inquiry_rev		= RD_MCP_VERSION,
 	.transport_type		= TRANSPORT_PLUGIN_VHBA_VDEV,
 	.attach_hba		= rd_attach_hba,
 	.detach_hba		= rd_detach_hba,
-	.allocate_virtdevice	= rd_allocate_virtdevice,
-	.create_virtdevice	= rd_create_virtdevice,
+	.alloc_device		= rd_alloc_device,
+	.configure_device	= rd_configure_device,
 	.free_device		= rd_free_device,
 	.parse_cdb		= rd_parse_cdb,
-	.check_configfs_dev_params = rd_check_configfs_dev_params,
 	.set_configfs_dev_params = rd_set_configfs_dev_params,
 	.show_configfs_dev_params = rd_show_configfs_dev_params,
-	.get_device_rev		= rd_get_device_rev,
-	.get_device_type	= rd_get_device_type,
+	.get_device_type	= sbc_get_device_type,
 	.get_blocks		= rd_get_blocks,
 };
 

drivers/target/target_core_rd.h

@@ -24,6 +24,7 @@ struct rd_dev_sg_table {
 #define RDF_HAS_PAGE_COUNT	0x01
 
 struct rd_dev {
+	struct se_device dev;
 	u32		rd_flags;
 	/* Unique Ramdisk Device ID in Ramdisk HBA */
 	u32		rd_dev_id;

drivers/target/target_core_sbc.c

@@ -1,10 +1,7 @@
 /*
  * SCSI Block Commands (SBC) parsing and emulation.
  *
- * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2002-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -37,7 +34,8 @@
 #include "target_core_ua.h"
 
 
-static int sbc_emulate_readcapacity(struct se_cmd *cmd)
+static sense_reason_t
+sbc_emulate_readcapacity(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 	unsigned long long blocks_long = dev->transport->get_blocks(dev);
@@ -54,22 +52,24 @@ static int sbc_emulate_readcapacity(struct se_cmd *cmd)
 	buf[1] = (blocks >> 16) & 0xff;
 	buf[2] = (blocks >> 8) & 0xff;
 	buf[3] = blocks & 0xff;
-	buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
-	buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
-	buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
-	buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
+	buf[4] = (dev->dev_attrib.block_size >> 24) & 0xff;
+	buf[5] = (dev->dev_attrib.block_size >> 16) & 0xff;
+	buf[6] = (dev->dev_attrib.block_size >> 8) & 0xff;
+	buf[7] = dev->dev_attrib.block_size & 0xff;
 
 	rbuf = transport_kmap_data_sg(cmd);
-	if (rbuf) {
-		memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
-		transport_kunmap_data_sg(cmd);
-	}
+	if (!rbuf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+	memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
+	transport_kunmap_data_sg(cmd);
 
 	target_complete_cmd(cmd, GOOD);
 	return 0;
 }
 
-static int sbc_emulate_readcapacity_16(struct se_cmd *cmd)
+static sense_reason_t
+sbc_emulate_readcapacity_16(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 	unsigned char *rbuf;
@@ -85,28 +85,29 @@ static int sbc_emulate_readcapacity_16(struct se_cmd *cmd)
 	buf[5] = (blocks >> 16) & 0xff;
 	buf[6] = (blocks >> 8) & 0xff;
 	buf[7] = blocks & 0xff;
-	buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff;
-	buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff;
-	buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff;
-	buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff;
+	buf[8] = (dev->dev_attrib.block_size >> 24) & 0xff;
+	buf[9] = (dev->dev_attrib.block_size >> 16) & 0xff;
+	buf[10] = (dev->dev_attrib.block_size >> 8) & 0xff;
+	buf[11] = dev->dev_attrib.block_size & 0xff;
 	/*
 	 * Set Thin Provisioning Enable bit following sbc3r22 in section
 	 * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled.
 	 */
-	if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
+	if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
 		buf[14] = 0x80;
 
 	rbuf = transport_kmap_data_sg(cmd);
-	if (rbuf) {
-		memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
-		transport_kunmap_data_sg(cmd);
-	}
+	if (!rbuf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+	memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
+	transport_kunmap_data_sg(cmd);
 
 	target_complete_cmd(cmd, GOOD);
 	return 0;
 }
 
-int spc_get_write_same_sectors(struct se_cmd *cmd)
+sector_t spc_get_write_same_sectors(struct se_cmd *cmd)
 {
 	u32 num_blocks;
 
@@ -129,13 +130,8 @@ int spc_get_write_same_sectors(struct se_cmd *cmd)
 }
 EXPORT_SYMBOL(spc_get_write_same_sectors);
 
-static int sbc_emulate_verify(struct se_cmd *cmd)
-{
-	target_complete_cmd(cmd, GOOD);
-	return 0;
-}
-
-static int sbc_emulate_noop(struct se_cmd *cmd)
+static sense_reason_t
+sbc_emulate_noop(struct se_cmd *cmd)
 {
 	target_complete_cmd(cmd, GOOD);
 	return 0;
@@ -143,7 +139,7 @@ static int sbc_emulate_noop(struct se_cmd *cmd)
 
 static inline u32 sbc_get_size(struct se_cmd *cmd, u32 sectors)
 {
-	return cmd->se_dev->se_sub_dev->se_dev_attrib.block_size * sectors;
+	return cmd->se_dev->dev_attrib.block_size * sectors;
 }
 
 static int sbc_check_valid_sectors(struct se_cmd *cmd)
@@ -152,7 +148,7 @@ static int sbc_check_valid_sectors(struct se_cmd *cmd)
 	unsigned long long end_lba;
 	u32 sectors;
 
-	sectors = cmd->data_length / dev->se_sub_dev->se_dev_attrib.block_size;
+	sectors = cmd->data_length / dev->dev_attrib.block_size;
 	end_lba = dev->transport->get_blocks(dev) + 1;
 
 	if (cmd->t_task_lba + sectors > end_lba) {
@@ -236,26 +232,37 @@ static inline unsigned long long transport_lba_64_ext(unsigned char *cdb)
 	return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
 }
 
-static int sbc_write_same_supported(struct se_device *dev,
-		unsigned char *flags)
+static sense_reason_t
+sbc_setup_write_same(struct se_cmd *cmd, unsigned char *flags, struct sbc_ops *ops)
 {
+	unsigned int sectors = spc_get_write_same_sectors(cmd);
+
 	if ((flags[0] & 0x04) || (flags[0] & 0x02)) {
 		pr_err("WRITE_SAME PBDATA and LBDATA"
 			" bits not supported for Block Discard"
 			" Emulation\n");
-		return -ENOSYS;
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
+	}
+	if (sectors > cmd->se_dev->dev_attrib.max_write_same_len) {
+		pr_warn("WRITE_SAME sectors: %u exceeds max_write_same_len: %u\n",
+			sectors, cmd->se_dev->dev_attrib.max_write_same_len);
+		return TCM_INVALID_CDB_FIELD;
 	}
-
 	/*
-	 * Currently for the emulated case we only accept
-	 * tpws with the UNMAP=1 bit set.
+	 * Special case for WRITE_SAME w/ UNMAP=1 that ends up getting
+	 * translated into block discard requests within backend code.
 	 */
-	if (!(flags[0] & 0x08)) {
-		pr_err("WRITE_SAME w/o UNMAP bit not"
-			" supported for Block Discard Emulation\n");
-		return -ENOSYS;
+	if (flags[0] & 0x08) {
+		if (!ops->execute_write_same_unmap)
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
+
+		cmd->execute_cmd = ops->execute_write_same_unmap;
+		return 0;
 	}
+	if (!ops->execute_write_same)
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
 
+	cmd->execute_cmd = ops->execute_write_same;
 	return 0;
 }
 
@@ -313,14 +320,14 @@ out:
 	kfree(buf);
 }
 
-int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
+sense_reason_t
+sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops)
 {
-	struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
 	struct se_device *dev = cmd->se_dev;
 	unsigned char *cdb = cmd->t_task_cdb;
 	unsigned int size;
 	u32 sectors = 0;
-	int ret;
+	sense_reason_t ret;
 
 	switch (cdb[0]) {
 	case READ_6:
@@ -379,9 +386,9 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 		cmd->execute_cmd = ops->execute_rw;
 		break;
 	case XDWRITEREAD_10:
-		if ((cmd->data_direction != DMA_TO_DEVICE) ||
+		if (cmd->data_direction != DMA_TO_DEVICE ||
 		    !(cmd->se_cmd_flags & SCF_BIDI))
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		sectors = transport_get_sectors_10(cdb);
 
 		cmd->t_task_lba = transport_lba_32(cdb);
@@ -419,27 +426,24 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 				cmd->se_cmd_flags |= SCF_FUA;
 			break;
 		case WRITE_SAME_32:
-			if (!ops->execute_write_same)
-				goto out_unsupported_cdb;
-
 			sectors = transport_get_sectors_32(cdb);
 			if (!sectors) {
 				pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not"
 				       " supported\n");
-				goto out_invalid_cdb_field;
+				return TCM_INVALID_CDB_FIELD;
 			}
 
 			size = sbc_get_size(cmd, 1);
 			cmd->t_task_lba = get_unaligned_be64(&cdb[12]);
 
-			if (sbc_write_same_supported(dev, &cdb[10]) < 0)
-				goto out_unsupported_cdb;
-			cmd->execute_cmd = ops->execute_write_same;
+			ret = sbc_setup_write_same(cmd, &cdb[10], ops);
+			if (ret)
+				return ret;
 			break;
 		default:
 			pr_err("VARIABLE_LENGTH_CMD service action"
 				" 0x%04x not supported\n", service_action);
-			goto out_unsupported_cdb;
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
 		}
 		break;
 	}
@@ -455,7 +459,7 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 		default:
 			pr_err("Unsupported SA: 0x%02x\n",
 				cmd->t_task_cdb[1] & 0x1f);
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		}
 		size = (cdb[10] << 24) | (cdb[11] << 16) |
 		       (cdb[12] << 8) | cdb[13];
@@ -463,7 +467,7 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 	case SYNCHRONIZE_CACHE:
 	case SYNCHRONIZE_CACHE_16:
 		if (!ops->execute_sync_cache)
-			goto out_unsupported_cdb;
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
 
 		/*
 		 * Extract LBA and range to be flushed for emulated SYNCHRONIZE_CACHE
@@ -484,42 +488,36 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 		 */
 		if (cmd->t_task_lba || sectors) {
 			if (sbc_check_valid_sectors(cmd) < 0)
-				goto out_invalid_cdb_field;
+				return TCM_INVALID_CDB_FIELD;
 		}
 		cmd->execute_cmd = ops->execute_sync_cache;
 		break;
 	case UNMAP:
 		if (!ops->execute_unmap)
-			goto out_unsupported_cdb;
+			return TCM_UNSUPPORTED_SCSI_OPCODE;
 
 		size = get_unaligned_be16(&cdb[7]);
 		cmd->execute_cmd = ops->execute_unmap;
 		break;
 	case WRITE_SAME_16:
-		if (!ops->execute_write_same)
-			goto out_unsupported_cdb;
-
 		sectors = transport_get_sectors_16(cdb);
 		if (!sectors) {
 			pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		}
 
 		size = sbc_get_size(cmd, 1);
 		cmd->t_task_lba = get_unaligned_be64(&cdb[2]);
 
-		if (sbc_write_same_supported(dev, &cdb[1]) < 0)
-			goto out_unsupported_cdb;
-		cmd->execute_cmd = ops->execute_write_same;
+		ret = sbc_setup_write_same(cmd, &cdb[1], ops);
+		if (ret)
+			return ret;
 		break;
 	case WRITE_SAME:
-		if (!ops->execute_write_same)
-			goto out_unsupported_cdb;
-
 		sectors = transport_get_sectors_10(cdb);
 		if (!sectors) {
 			pr_err("WSNZ=1, WRITE_SAME w/sectors=0 not supported\n");
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		}
 
 		size = sbc_get_size(cmd, 1);
@@ -529,13 +527,13 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 		 * Follow sbcr26 with WRITE_SAME (10) and check for the existence
 		 * of byte 1 bit 3 UNMAP instead of original reserved field
 		 */
-		if (sbc_write_same_supported(dev, &cdb[1]) < 0)
-			goto out_unsupported_cdb;
-		cmd->execute_cmd = ops->execute_write_same;
+		ret = sbc_setup_write_same(cmd, &cdb[1], ops);
+		if (ret)
+			return ret;
 		break;
 	case VERIFY:
 		size = 0;
-		cmd->execute_cmd = sbc_emulate_verify;
+		cmd->execute_cmd = sbc_emulate_noop;
 		break;
 	case REZERO_UNIT:
 	case SEEK_6:
@@ -557,24 +555,24 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 
 	/* reject any command that we don't have a handler for */
 	if (!(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) && !cmd->execute_cmd)
-		goto out_unsupported_cdb;
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
 
 	if (cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
 		unsigned long long end_lba;
 
-		if (sectors > su_dev->se_dev_attrib.fabric_max_sectors) {
+		if (sectors > dev->dev_attrib.fabric_max_sectors) {
 			printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
 				" big sectors %u exceeds fabric_max_sectors:"
 				" %u\n", cdb[0], sectors,
-				su_dev->se_dev_attrib.fabric_max_sectors);
-			goto out_invalid_cdb_field;
+				dev->dev_attrib.fabric_max_sectors);
+			return TCM_INVALID_CDB_FIELD;
 		}
-		if (sectors > su_dev->se_dev_attrib.hw_max_sectors) {
+		if (sectors > dev->dev_attrib.hw_max_sectors) {
 			printk_ratelimited(KERN_ERR "SCSI OP %02xh with too"
 				" big sectors %u exceeds backend hw_max_sectors:"
 				" %u\n", cdb[0], sectors,
-				su_dev->se_dev_attrib.hw_max_sectors);
-			goto out_invalid_cdb_field;
+				dev->dev_attrib.hw_max_sectors);
+			return TCM_INVALID_CDB_FIELD;
 		}
 
 		end_lba = dev->transport->get_blocks(dev) + 1;
@@ -582,25 +580,18 @@ int sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops)
 			pr_err("cmd exceeds last lba %llu "
 				"(lba %llu, sectors %u)\n",
 				end_lba, cmd->t_task_lba, sectors);
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		}
 
 		size = sbc_get_size(cmd, sectors);
 	}
 
-	ret = target_cmd_size_check(cmd, size);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-
-out_unsupported_cdb:
-	cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-	cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-	return -EINVAL;
-out_invalid_cdb_field:
-	cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-	cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-	return -EINVAL;
+	return target_cmd_size_check(cmd, size);
 }
 EXPORT_SYMBOL(sbc_parse_cdb);
+
+u32 sbc_get_device_type(struct se_device *dev)
+{
+	return TYPE_DISK;
+}
+EXPORT_SYMBOL(sbc_get_device_type);

drivers/target/target_core_spc.c

@@ -1,10 +1,7 @@
 /*
  * SCSI Primary Commands (SPC) parsing and emulation.
  *
- * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2002-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -69,7 +66,8 @@ static void spc_fill_alua_data(struct se_port *port, unsigned char *buf)
 	spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
 }
 
-static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
+static sense_reason_t
+spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
 {
 	struct se_lun *lun = cmd->se_lun;
 	struct se_device *dev = cmd->se_dev;
@@ -78,7 +76,7 @@ static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
 	if (dev->transport->get_device_type(dev) == TYPE_TAPE)
 		buf[1] = 0x80;
 
-	buf[2] = dev->transport->get_device_rev(dev);
+	buf[2] = 0x05; /* SPC-3 */
 
 	/*
 	 * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2
@@ -95,34 +93,32 @@ static int spc_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
 	/*
 	 * Enable SCCS and TPGS fields for Emulated ALUA
 	 */
-	if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED)
-		spc_fill_alua_data(lun->lun_sep, buf);
+	spc_fill_alua_data(lun->lun_sep, buf);
 
 	buf[7] = 0x2; /* CmdQue=1 */
 
 	snprintf(&buf[8], 8, "LIO-ORG");
-	snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
-	snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
+	snprintf(&buf[16], 16, "%s", dev->t10_wwn.model);
+	snprintf(&buf[32], 4, "%s", dev->t10_wwn.revision);
 	buf[4] = 31; /* Set additional length to 31 */
 
 	return 0;
 }
 
 /* unit serial number */
-static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
 {
 	struct se_device *dev = cmd->se_dev;
 	u16 len = 0;
 
-	if (dev->se_sub_dev->su_dev_flags &
-			SDF_EMULATED_VPD_UNIT_SERIAL) {
+	if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
 		u32 unit_serial_len;
 
-		unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial);
+		unit_serial_len = strlen(dev->t10_wwn.unit_serial);
 		unit_serial_len++; /* For NULL Terminator */
 
-		len += sprintf(&buf[4], "%s",
-			dev->se_sub_dev->t10_wwn.unit_serial);
+		len += sprintf(&buf[4], "%s", dev->t10_wwn.unit_serial);
 		len++; /* Extra Byte for NULL Terminator */
 		buf[3] = len;
 	}
@@ -132,7 +128,7 @@ static int spc_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
 static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
 		unsigned char *buf)
 {
-	unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0];
+	unsigned char *p = &dev->t10_wwn.unit_serial[0];
 	int cnt;
 	bool next = true;
 
@@ -164,7 +160,8 @@ static void spc_parse_naa_6h_vendor_specific(struct se_device *dev,
  * Device identification VPD, for a complete list of
  * DESIGNATOR TYPEs see spc4r17 Table 459.
  */
-static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_lun *lun = cmd->se_lun;
@@ -173,7 +170,7 @@ static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
 	struct t10_alua_lu_gp_member *lu_gp_mem;
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
-	unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0];
+	unsigned char *prod = &dev->t10_wwn.model[0];
 	u32 prod_len;
 	u32 unit_serial_len, off = 0;
 	u16 len = 0, id_len;
@@ -188,7 +185,7 @@ static int spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
 	 * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial
 	 * value in order to return the NAA id.
 	 */
-	if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL))
+	if (!(dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL))
 		goto check_t10_vend_desc;
 
 	/* CODE SET == Binary */
@@ -236,14 +233,12 @@ check_t10_vend_desc:
 	prod_len += strlen(prod);
 	prod_len++; /* For : */
 
-	if (dev->se_sub_dev->su_dev_flags &
-			SDF_EMULATED_VPD_UNIT_SERIAL) {
-		unit_serial_len =
-			strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]);
+	if (dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
+		unit_serial_len = strlen(&dev->t10_wwn.unit_serial[0]);
 		unit_serial_len++; /* For NULL Terminator */
 
 		id_len += sprintf(&buf[off+12], "%s:%s", prod,
-				&dev->se_sub_dev->t10_wwn.unit_serial[0]);
+				&dev->t10_wwn.unit_serial[0]);
 	}
 	buf[off] = 0x2; /* ASCII */
 	buf[off+1] = 0x1; /* T10 Vendor ID */
@@ -298,10 +293,6 @@ check_t10_vend_desc:
 		 * Get the PROTOCOL IDENTIFIER as defined by spc4r17
 		 * section 7.5.1 Table 362
 		 */
-		if (dev->se_sub_dev->t10_alua.alua_type !=
-				SPC3_ALUA_EMULATED)
-			goto check_scsi_name;
-
 		tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
 		if (!tg_pt_gp_mem)
 			goto check_lu_gp;
@@ -415,20 +406,22 @@ check_scsi_name:
 }
 
 /* Extended INQUIRY Data VPD Page */
-static int spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
 {
 	buf[3] = 0x3c;
 	/* Set HEADSUP, ORDSUP, SIMPSUP */
 	buf[5] = 0x07;
 
 	/* If WriteCache emulation is enabled, set V_SUP */
-	if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
+	if (cmd->se_dev->dev_attrib.emulate_write_cache > 0)
 		buf[6] = 0x01;
 	return 0;
 }
 
 /* Block Limits VPD page */
-static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
 {
 	struct se_device *dev = cmd->se_dev;
 	u32 max_sectors;
@@ -439,7 +432,7 @@ static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
 	 * emulate_tpu=1 or emulate_tpws=1 we will be expect a
 	 * different page length for Thin Provisioning.
 	 */
-	if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws)
+	if (dev->dev_attrib.emulate_tpu || dev->dev_attrib.emulate_tpws)
 		have_tp = 1;
 
 	buf[0] = dev->transport->get_device_type(dev);
@@ -456,62 +449,70 @@ static int spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
 	/*
 	 * Set MAXIMUM TRANSFER LENGTH
 	 */
-	max_sectors = min(dev->se_sub_dev->se_dev_attrib.fabric_max_sectors,
-			  dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+	max_sectors = min(dev->dev_attrib.fabric_max_sectors,
+			  dev->dev_attrib.hw_max_sectors);
 	put_unaligned_be32(max_sectors, &buf[8]);
 
 	/*
 	 * Set OPTIMAL TRANSFER LENGTH
 	 */
-	put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]);
+	put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
 
 	/*
 	 * Exit now if we don't support TP.
 	 */
 	if (!have_tp)
-		return 0;
+		goto max_write_same;
 
 	/*
 	 * Set MAXIMUM UNMAP LBA COUNT
 	 */
-	put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]);
+	put_unaligned_be32(dev->dev_attrib.max_unmap_lba_count, &buf[20]);
 
 	/*
 	 * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT
 	 */
-	put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count,
+	put_unaligned_be32(dev->dev_attrib.max_unmap_block_desc_count,
 			   &buf[24]);
 
 	/*
 	 * Set OPTIMAL UNMAP GRANULARITY
 	 */
-	put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]);
+	put_unaligned_be32(dev->dev_attrib.unmap_granularity, &buf[28]);
 
 	/*
 	 * UNMAP GRANULARITY ALIGNMENT
 	 */
-	put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment,
+	put_unaligned_be32(dev->dev_attrib.unmap_granularity_alignment,
 			   &buf[32]);
-	if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0)
+	if (dev->dev_attrib.unmap_granularity_alignment != 0)
 		buf[32] |= 0x80; /* Set the UGAVALID bit */
 
+	/*
+	 * MAXIMUM WRITE SAME LENGTH
+	 */
+max_write_same:
+	put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
+
 	return 0;
 }
 
 /* Block Device Characteristics VPD page */
-static int spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf)
 {
 	struct se_device *dev = cmd->se_dev;
 
 	buf[0] = dev->transport->get_device_type(dev);
 	buf[3] = 0x3c;
-	buf[5] = dev->se_sub_dev->se_dev_attrib.is_nonrot ? 1 : 0;
+	buf[5] = dev->dev_attrib.is_nonrot ? 1 : 0;
 
 	return 0;
 }
 
 /* Thin Provisioning VPD */
-static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 {
 	struct se_device *dev = cmd->se_dev;
 
@@ -546,7 +547,7 @@ static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 	 * the UNMAP command (see 5.25). A TPU bit set to zero indicates
 	 * that the device server does not support the UNMAP command.
 	 */
-	if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0)
+	if (dev->dev_attrib.emulate_tpu != 0)
 		buf[5] = 0x80;
 
 	/*
@@ -555,17 +556,18 @@ static int spc_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 	 * A TPWS bit set to zero indicates that the device server does not
 	 * support the use of the WRITE SAME (16) command to unmap LBAs.
 	 */
-	if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0)
+	if (dev->dev_attrib.emulate_tpws != 0)
 		buf[5] |= 0x40;
 
 	return 0;
 }
 
-static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
+static sense_reason_t
+spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf);
 
 static struct {
 	uint8_t		page;
-	int		(*emulate)(struct se_cmd *, unsigned char *);
+	sense_reason_t	(*emulate)(struct se_cmd *, unsigned char *);
 } evpd_handlers[] = {
 	{ .page = 0x00, .emulate = spc_emulate_evpd_00 },
 	{ .page = 0x80, .emulate = spc_emulate_evpd_80 },
@@ -577,7 +579,8 @@ static struct {
 };
 
 /* supported vital product data pages */
-static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
+static sense_reason_t
+spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
 {
 	int p;
 
@@ -586,8 +589,7 @@ static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
 	 * Registered Extended LUN WWN has been set via ConfigFS
 	 * during device creation/restart.
 	 */
-	if (cmd->se_dev->se_sub_dev->su_dev_flags &
-			SDF_EMULATED_VPD_UNIT_SERIAL) {
+	if (cmd->se_dev->dev_flags & DF_EMULATED_VPD_UNIT_SERIAL) {
 		buf[3] = ARRAY_SIZE(evpd_handlers);
 		for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p)
 			buf[p + 4] = evpd_handlers[p].page;
@@ -596,14 +598,16 @@ static int spc_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
 	return 0;
 }
 
-static int spc_emulate_inquiry(struct se_cmd *cmd)
+static sense_reason_t
+spc_emulate_inquiry(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_portal_group *tpg = cmd->se_lun->lun_sep->sep_tpg;
 	unsigned char *rbuf;
 	unsigned char *cdb = cmd->t_task_cdb;
 	unsigned char buf[SE_INQUIRY_BUF];
-	int p, ret;
+	sense_reason_t ret;
+	int p;
 
 	memset(buf, 0, SE_INQUIRY_BUF);
 
@@ -616,8 +620,7 @@ static int spc_emulate_inquiry(struct se_cmd *cmd)
 		if (cdb[2]) {
 			pr_err("INQUIRY with EVPD==0 but PAGE CODE=%02x\n",
 			       cdb[2]);
-			cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-			ret = -EINVAL;
+			ret = TCM_INVALID_CDB_FIELD;
 			goto out;
 		}
 
@@ -634,33 +637,43 @@ static int spc_emulate_inquiry(struct se_cmd *cmd)
 	}
 
 	pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]);
-	cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-	ret = -EINVAL;
+	ret = TCM_INVALID_CDB_FIELD;
 
 out:
 	rbuf = transport_kmap_data_sg(cmd);
-	if (rbuf) {
-		memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
-		transport_kunmap_data_sg(cmd);
-	}
+	if (!rbuf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+	memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
+	transport_kunmap_data_sg(cmd);
 
 	if (!ret)
 		target_complete_cmd(cmd, GOOD);
 	return ret;
 }
 
-static int spc_modesense_rwrecovery(unsigned char *p)
+static int spc_modesense_rwrecovery(struct se_device *dev, u8 pc, u8 *p)
 {
 	p[0] = 0x01;
 	p[1] = 0x0a;
 
+	/* No changeable values for now */
+	if (pc == 1)
+		goto out;
+
+out:
 	return 12;
 }
 
-static int spc_modesense_control(struct se_device *dev, unsigned char *p)
+static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p)
 {
 	p[0] = 0x0a;
 	p[1] = 0x0a;
+
+	/* No changeable values for now */
+	if (pc == 1)
+		goto out;
+
 	p[2] = 2;
 	/*
 	 * From spc4r23, 7.4.7 Control mode page
@@ -690,7 +703,7 @@ static int spc_modesense_control(struct se_device *dev, unsigned char *p)
 	 * command sequence order shall be explicitly handled by the application client
 	 * through the selection of appropriate ommands and task attributes.
 	 */
-	p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
+	p[3] = (dev->dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10;
 	/*
 	 * From spc4r17, section 7.4.6 Control mode Page
 	 *
@@ -720,8 +733,8 @@ static int spc_modesense_control(struct se_device *dev, unsigned char *p)
 	 * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless
 	 * to the number of commands completed with one of those status codes.
 	 */
-	p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
-	       (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
+	p[4] = (dev->dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 :
+	       (dev->dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00;
 	/*
 	 * From spc4r17, section 7.4.6 Control mode Page
 	 *
@@ -734,25 +747,56 @@ static int spc_modesense_control(struct se_device *dev, unsigned char *p)
 	 * which the command was received shall be completed with TASK ABORTED
 	 * status (see SAM-4).
 	 */
-	p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00;
+	p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
 	p[8] = 0xff;
 	p[9] = 0xff;
 	p[11] = 30;
 
+out:
 	return 12;
 }
 
-static int spc_modesense_caching(struct se_device *dev, unsigned char *p)
+static int spc_modesense_caching(struct se_device *dev, u8 pc, u8 *p)
 {
 	p[0] = 0x08;
 	p[1] = 0x12;
-	if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
+
+	/* No changeable values for now */
+	if (pc == 1)
+		goto out;
+
+	if (dev->dev_attrib.emulate_write_cache > 0)
 		p[2] = 0x04; /* Write Cache Enable */
 	p[12] = 0x20; /* Disabled Read Ahead */
 
+out:
 	return 20;
 }
 
+static int spc_modesense_informational_exceptions(struct se_device *dev, u8 pc, unsigned char *p)
+{
+	p[0] = 0x1c;
+	p[1] = 0x0a;
+
+	/* No changeable values for now */
+	if (pc == 1)
+		goto out;
+
+out:
+	return 12;
+}
+
+static struct {
+	uint8_t		page;
+	uint8_t		subpage;
+	int		(*emulate)(struct se_device *, u8, unsigned char *);
+} modesense_handlers[] = {
+	{ .page = 0x01, .subpage = 0x00, .emulate = spc_modesense_rwrecovery },
+	{ .page = 0x08, .subpage = 0x00, .emulate = spc_modesense_caching },
+	{ .page = 0x0a, .subpage = 0x00, .emulate = spc_modesense_control },
+	{ .page = 0x1c, .subpage = 0x00, .emulate = spc_modesense_informational_exceptions },
+};
+
 static void spc_modesense_write_protect(unsigned char *buf, int type)
 {
 	/*
@@ -779,82 +823,224 @@ static void spc_modesense_dpofua(unsigned char *buf, int type)
 	}
 }
 
-static int spc_emulate_modesense(struct se_cmd *cmd)
+static int spc_modesense_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
+{
+	*buf++ = 8;
+	put_unaligned_be32(min(blocks, 0xffffffffull), buf);
+	buf += 4;
+	put_unaligned_be32(block_size, buf);
+	return 9;
+}
+
+static int spc_modesense_long_blockdesc(unsigned char *buf, u64 blocks, u32 block_size)
+{
+	if (blocks <= 0xffffffff)
+		return spc_modesense_blockdesc(buf + 3, blocks, block_size) + 3;
+
+	*buf++ = 1;		/* LONGLBA */
+	buf += 2;
+	*buf++ = 16;
+	put_unaligned_be64(blocks, buf);
+	buf += 12;
+	put_unaligned_be32(block_size, buf);
+
+	return 17;
+}
+
+static sense_reason_t spc_emulate_modesense(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 	char *cdb = cmd->t_task_cdb;
-	unsigned char *rbuf;
+	unsigned char *buf, *map_buf;
 	int type = dev->transport->get_device_type(dev);
 	int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10);
-	u32 offset = ten ? 8 : 4;
+	bool dbd = !!(cdb[1] & 0x08);
+	bool llba = ten ? !!(cdb[1] & 0x10) : false;
+	u8 pc = cdb[2] >> 6;
+	u8 page = cdb[2] & 0x3f;
+	u8 subpage = cdb[3];
 	int length = 0;
-	unsigned char buf[SE_MODE_PAGE_BUF];
-
-	memset(buf, 0, SE_MODE_PAGE_BUF);
+	int ret;
+	int i;
 
-	switch (cdb[2] & 0x3f) {
-	case 0x01:
-		length = spc_modesense_rwrecovery(&buf[offset]);
-		break;
-	case 0x08:
-		length = spc_modesense_caching(dev, &buf[offset]);
-		break;
-	case 0x0a:
-		length = spc_modesense_control(dev, &buf[offset]);
-		break;
-	case 0x3f:
-		length = spc_modesense_rwrecovery(&buf[offset]);
-		length += spc_modesense_caching(dev, &buf[offset+length]);
-		length += spc_modesense_control(dev, &buf[offset+length]);
-		break;
-	default:
-		pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
-		       cdb[2] & 0x3f, cdb[3]);
-		cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE;
-		return -EINVAL;
+	map_buf = transport_kmap_data_sg(cmd);
+	if (!map_buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	/*
+	 * If SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is not set, then we
+	 * know we actually allocated a full page.  Otherwise, if the
+	 * data buffer is too small, allocate a temporary buffer so we
+	 * don't have to worry about overruns in all our INQUIRY
+	 * emulation handling.
+	 */
+	if (cmd->data_length < SE_MODE_PAGE_BUF &&
+	    (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
+		buf = kzalloc(SE_MODE_PAGE_BUF, GFP_KERNEL);
+		if (!buf) {
+			transport_kunmap_data_sg(cmd);
+			return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		}
+	} else {
+		buf = map_buf;
 	}
-	offset += length;
-
-	if (ten) {
-		offset -= 2;
-		buf[0] = (offset >> 8) & 0xff;
-		buf[1] = offset & 0xff;
-		offset += 2;
-
-		if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
-		    (cmd->se_deve &&
-		    (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
-			spc_modesense_write_protect(&buf[3], type);
-
-		if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
-		    (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
-			spc_modesense_dpofua(&buf[3], type);
+	/*
+	 * Skip over MODE DATA LENGTH + MEDIUM TYPE fields to byte 3 for
+	 * MODE_SENSE_10 and byte 2 for MODE_SENSE (6).
+	 */
+	length = ten ? 3 : 2;
+
+	/* DEVICE-SPECIFIC PARAMETER */
+	if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
+	    (cmd->se_deve &&
+	     (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
+		spc_modesense_write_protect(&buf[length], type);
+
+	if ((dev->dev_attrib.emulate_write_cache > 0) &&
+	    (dev->dev_attrib.emulate_fua_write > 0))
+		spc_modesense_dpofua(&buf[length], type);
+
+	++length;
+
+	/* BLOCK DESCRIPTOR */
+
+	/*
+	 * For now we only include a block descriptor for disk (SBC)
+	 * devices; other command sets use a slightly different format.
+	 */
+	if (!dbd && type == TYPE_DISK) {
+		u64 blocks = dev->transport->get_blocks(dev);
+		u32 block_size = dev->dev_attrib.block_size;
+
+		if (ten) {
+			if (llba) {
+				length += spc_modesense_long_blockdesc(&buf[length],
+								       blocks, block_size);
+			} else {
+				length += 3;
+				length += spc_modesense_blockdesc(&buf[length],
+								  blocks, block_size);
+			}
+		} else {
+			length += spc_modesense_blockdesc(&buf[length], blocks,
+							  block_size);
+		}
 	} else {
-		offset -= 1;
-		buf[0] = offset & 0xff;
-		offset += 1;
-
-		if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) ||
-		    (cmd->se_deve &&
-		    (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)))
-			spc_modesense_write_protect(&buf[2], type);
-
-		if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) &&
-		    (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0))
-			spc_modesense_dpofua(&buf[2], type);
+		if (ten)
+			length += 4;
+		else
+			length += 1;
 	}
 
-	rbuf = transport_kmap_data_sg(cmd);
-	if (rbuf) {
-		memcpy(rbuf, buf, min(offset, cmd->data_length));
-		transport_kunmap_data_sg(cmd);
+	if (page == 0x3f) {
+		if (subpage != 0x00 && subpage != 0xff) {
+			pr_warn("MODE_SENSE: Invalid subpage code: 0x%02x\n", subpage);
+			kfree(buf);
+			transport_kunmap_data_sg(cmd);
+			return TCM_INVALID_CDB_FIELD;
+		}
+
+		for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i) {
+			/*
+			 * Tricky way to say all subpage 00h for
+			 * subpage==0, all subpages for subpage==0xff
+			 * (and we just checked above that those are
+			 * the only two possibilities).
+			 */
+			if ((modesense_handlers[i].subpage & ~subpage) == 0) {
+				ret = modesense_handlers[i].emulate(dev, pc, &buf[length]);
+				if (!ten && length + ret >= 255)
+					break;
+				length += ret;
+			}
+		}
+
+		goto set_length;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
+		if (modesense_handlers[i].page == page &&
+		    modesense_handlers[i].subpage == subpage) {
+			length += modesense_handlers[i].emulate(dev, pc, &buf[length]);
+			goto set_length;
+		}
+
+	/*
+	 * We don't intend to implement:
+	 *  - obsolete page 03h "format parameters" (checked by Solaris)
+	 */
+	if (page != 0x03)
+		pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n",
+		       page, subpage);
+
+	transport_kunmap_data_sg(cmd);
+	return TCM_UNKNOWN_MODE_PAGE;
+
+set_length:
+	if (ten)
+		put_unaligned_be16(length - 2, buf);
+	else
+		buf[0] = length - 1;
+
+	if (buf != map_buf) {
+		memcpy(map_buf, buf, cmd->data_length);
+		kfree(buf);
 	}
 
+	transport_kunmap_data_sg(cmd);
 	target_complete_cmd(cmd, GOOD);
 	return 0;
 }
 
-static int spc_emulate_request_sense(struct se_cmd *cmd)
+static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd)
+{
+	struct se_device *dev = cmd->se_dev;
+	char *cdb = cmd->t_task_cdb;
+	bool ten = cdb[0] == MODE_SELECT_10;
+	int off = ten ? 8 : 4;
+	bool pf = !!(cdb[1] & 0x10);
+	u8 page, subpage;
+	unsigned char *buf;
+	unsigned char tbuf[SE_MODE_PAGE_BUF];
+	int length;
+	int ret = 0;
+	int i;
+
+	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+	if (!pf) {
+		ret = TCM_INVALID_CDB_FIELD;
+		goto out;
+	}
+
+	page = buf[off] & 0x3f;
+	subpage = buf[off] & 0x40 ? buf[off + 1] : 0;
+
+	for (i = 0; i < ARRAY_SIZE(modesense_handlers); ++i)
+		if (modesense_handlers[i].page == page &&
+		    modesense_handlers[i].subpage == subpage) {
+			memset(tbuf, 0, SE_MODE_PAGE_BUF);
+			length = modesense_handlers[i].emulate(dev, 0, tbuf);
+			goto check_contents;
+		}
+
+	ret = TCM_UNKNOWN_MODE_PAGE;
+	goto out;
+
+check_contents:
+	if (memcmp(buf + off, tbuf, length))
+		ret = TCM_INVALID_PARAMETER_LIST;
+
+out:
+	transport_kunmap_data_sg(cmd);
+
+	if (!ret)
+		target_complete_cmd(cmd, GOOD);
+	return ret;
+}
+
+static sense_reason_t spc_emulate_request_sense(struct se_cmd *cmd)
 {
 	unsigned char *cdb = cmd->t_task_cdb;
 	unsigned char *rbuf;
@@ -866,19 +1052,14 @@ static int spc_emulate_request_sense(struct se_cmd *cmd)
 	if (cdb[1] & 0x01) {
 		pr_err("REQUEST_SENSE description emulation not"
 			" supported\n");
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -ENOSYS;
+		return TCM_INVALID_CDB_FIELD;
 	}
 
 	rbuf = transport_kmap_data_sg(cmd);
-	if (cmd->scsi_sense_reason != 0) {
-		/*
-		 * Out of memory.  We will fail with CHECK CONDITION, so
-		 * we must not clear the unit attention condition.
-		 */
-		target_complete_cmd(cmd, CHECK_CONDITION);
-		return 0;
-	} else if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
+	if (!rbuf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+	if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) {
 		/*
 		 * CURRENT ERROR, UNIT ATTENTION
 		 */
@@ -905,33 +1086,97 @@ static int spc_emulate_request_sense(struct se_cmd *cmd)
 		buf[7] = 0x0A;
 	}
 
-	if (rbuf) {
-		memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
-		transport_kunmap_data_sg(cmd);
+	memcpy(rbuf, buf, min_t(u32, sizeof(buf), cmd->data_length));
+	transport_kunmap_data_sg(cmd);
+
+	target_complete_cmd(cmd, GOOD);
+	return 0;
+}
+
+sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd)
+{
+	struct se_dev_entry *deve;
+	struct se_session *sess = cmd->se_sess;
+	unsigned char *buf;
+	u32 lun_count = 0, offset = 8, i;
+
+	if (cmd->data_length < 16) {
+		pr_warn("REPORT LUNS allocation length %u too small\n",
+			cmd->data_length);
+		return TCM_INVALID_CDB_FIELD;
+	}
+
+	buf = transport_kmap_data_sg(cmd);
+	if (!buf)
+		return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
+	/*
+	 * If no struct se_session pointer is present, this struct se_cmd is
+	 * coming via a target_core_mod PASSTHROUGH op, and not through
+	 * a $FABRIC_MOD.  In that case, report LUN=0 only.
+	 */
+	if (!sess) {
+		int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
+		lun_count = 1;
+		goto done;
+	}
+
+	spin_lock_irq(&sess->se_node_acl->device_list_lock);
+	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
+		deve = sess->se_node_acl->device_list[i];
+		if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
+			continue;
+		/*
+		 * We determine the correct LUN LIST LENGTH even once we
+		 * have reached the initial allocation length.
+		 * See SPC2-R20 7.19.
+		 */
+		lun_count++;
+		if ((offset + 8) > cmd->data_length)
+			continue;
+
+		int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
+		offset += 8;
 	}
+	spin_unlock_irq(&sess->se_node_acl->device_list_lock);
+
+	/*
+	 * See SPC3 r07, page 159.
+	 */
+done:
+	lun_count *= 8;
+	buf[0] = ((lun_count >> 24) & 0xff);
+	buf[1] = ((lun_count >> 16) & 0xff);
+	buf[2] = ((lun_count >> 8) & 0xff);
+	buf[3] = (lun_count & 0xff);
+	transport_kunmap_data_sg(cmd);
 
 	target_complete_cmd(cmd, GOOD);
 	return 0;
 }
+EXPORT_SYMBOL(spc_emulate_report_luns);
 
-static int spc_emulate_testunitready(struct se_cmd *cmd)
+static sense_reason_t
+spc_emulate_testunitready(struct se_cmd *cmd)
 {
 	target_complete_cmd(cmd, GOOD);
 	return 0;
 }
 
-int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
+sense_reason_t
+spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 {
 	struct se_device *dev = cmd->se_dev;
-	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	unsigned char *cdb = cmd->t_task_cdb;
 
 	switch (cdb[0]) {
 	case MODE_SELECT:
 		*size = cdb[4];
+		cmd->execute_cmd = spc_emulate_modeselect;
 		break;
 	case MODE_SELECT_10:
 		*size = (cdb[7] << 8) + cdb[8];
+		cmd->execute_cmd = spc_emulate_modeselect;
 		break;
 	case MODE_SENSE:
 		*size = cdb[4];
@@ -946,14 +1191,12 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 		*size = (cdb[7] << 8) + cdb[8];
 		break;
 	case PERSISTENT_RESERVE_IN:
-		if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
-			cmd->execute_cmd = target_scsi3_emulate_pr_in;
 		*size = (cdb[7] << 8) + cdb[8];
+		cmd->execute_cmd = target_scsi3_emulate_pr_in;
 		break;
 	case PERSISTENT_RESERVE_OUT:
-		if (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS)
-			cmd->execute_cmd = target_scsi3_emulate_pr_out;
 		*size = (cdb[7] << 8) + cdb[8];
+		cmd->execute_cmd = target_scsi3_emulate_pr_out;
 		break;
 	case RELEASE:
 	case RELEASE_10:
@@ -962,8 +1205,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 		else
 			*size = cmd->data_length;
 
-		if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH)
-			cmd->execute_cmd = target_scsi2_reservation_release;
+		cmd->execute_cmd = target_scsi2_reservation_release;
 		break;
 	case RESERVE:
 	case RESERVE_10:
@@ -976,15 +1218,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 		else
 			*size = cmd->data_length;
 
-		/*
-		 * Setup the legacy emulated handler for SPC-2 and
-		 * >= SPC-3 compatible reservation handling (CRH=1)
-		 * Otherwise, we assume the underlying SCSI logic is
-		 * is running in SPC_PASSTHROUGH, and wants reservations
-		 * emulation disabled.
-		 */
-		if (su_dev->t10_pr.res_type != SPC_PASSTHROUGH)
-			cmd->execute_cmd = target_scsi2_reservation_reserve;
+		cmd->execute_cmd = target_scsi2_reservation_reserve;
 		break;
 	case REQUEST_SENSE:
 		*size = cdb[4];
@@ -997,8 +1231,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 		 * Do implict HEAD_OF_QUEUE processing for INQUIRY.
 		 * See spc4r17 section 5.3
 		 */
-		if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
-			cmd->sam_task_attr = MSG_HEAD_TAG;
+		cmd->sam_task_attr = MSG_HEAD_TAG;
 		cmd->execute_cmd = spc_emulate_inquiry;
 		break;
 	case SECURITY_PROTOCOL_IN:
@@ -1020,14 +1253,13 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 		*size = (cdb[6] << 16) + (cdb[7] << 8) + cdb[8];
 		break;
 	case REPORT_LUNS:
-		cmd->execute_cmd = target_report_luns;
+		cmd->execute_cmd = spc_emulate_report_luns;
 		*size = (cdb[6] << 24) | (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
 		/*
 		 * Do implict HEAD_OF_QUEUE processing for REPORT_LUNS
 		 * See spc4r17 section 5.3
 		 */
-		if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
-			cmd->sam_task_attr = MSG_HEAD_TAG;
+		cmd->sam_task_attr = MSG_HEAD_TAG;
 		break;
 	case TEST_UNIT_READY:
 		cmd->execute_cmd = spc_emulate_testunitready;
@@ -1039,8 +1271,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 			 * MAINTENANCE_IN from SCC-2
 			 * Check for emulated MI_REPORT_TARGET_PGS
 			 */
-			if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS &&
-			    su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+			if ((cdb[1] & 0x1f) == MI_REPORT_TARGET_PGS) {
 				cmd->execute_cmd =
 					target_emulate_report_target_port_groups;
 			}
@@ -1058,8 +1289,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 			 * MAINTENANCE_OUT from SCC-2
 			 * Check for emulated MO_SET_TARGET_PGS.
 			 */
-			if (cdb[1] == MO_SET_TARGET_PGS &&
-			    su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
+			if (cdb[1] == MO_SET_TARGET_PGS) {
 				cmd->execute_cmd =
 					target_emulate_set_target_port_groups;
 			}
@@ -1075,9 +1305,7 @@ int spc_parse_cdb(struct se_cmd *cmd, unsigned int *size)
 		pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
 			" 0x%02x, sending CHECK_CONDITION.\n",
 			cmd->se_tfo->get_fabric_name(), cdb[0]);
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
-		return -EINVAL;
+		return TCM_UNSUPPORTED_SCSI_OPCODE;
 	}
 
 	return 0;

drivers/target/target_core_stat.c

@@ -1,13 +1,10 @@
 /*******************************************************************************
  * Filename:  target_core_stat.c
  *
- * Copyright (c) 2011 Rising Tide Systems
- * Copyright (c) 2011 Linux-iSCSI.org
- *
  * Modern ConfigFS group context specific statistics based on original
  * target_core_mib.c code
  *
- * Copyright (c) 2006-2007 SBE, Inc.  All Rights Reserved.
+ * (c) Copyright 2006-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@linux-iscsi.org>
  *
@@ -80,13 +77,9 @@ static struct target_stat_scsi_dev_attribute				\
 static ssize_t target_stat_scsi_dev_show_attr_inst(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_hba *hba = se_subdev->se_dev_hba;
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
+	struct se_hba *hba = dev->se_hba;
 
 	return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
 }
@@ -95,12 +88,8 @@ DEV_STAT_SCSI_DEV_ATTR_RO(inst);
 static ssize_t target_stat_scsi_dev_show_attr_indx(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
 }
@@ -109,13 +98,6 @@ DEV_STAT_SCSI_DEV_ATTR_RO(indx);
 static ssize_t target_stat_scsi_dev_show_attr_role(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
-
 	return snprintf(page, PAGE_SIZE, "Target\n");
 }
 DEV_STAT_SCSI_DEV_ATTR_RO(role);
@@ -123,12 +105,8 @@ DEV_STAT_SCSI_DEV_ATTR_RO(role);
 static ssize_t target_stat_scsi_dev_show_attr_ports(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_port_count);
 }
@@ -176,13 +154,9 @@ static struct target_stat_scsi_tgt_dev_attribute			\
 static ssize_t target_stat_scsi_tgt_dev_show_attr_inst(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_hba *hba = se_subdev->se_dev_hba;
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
+	struct se_hba *hba = dev->se_hba;
 
 	return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
 }
@@ -191,12 +165,8 @@ DEV_STAT_SCSI_TGT_DEV_ATTR_RO(inst);
 static ssize_t target_stat_scsi_tgt_dev_show_attr_indx(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
 }
@@ -205,13 +175,6 @@ DEV_STAT_SCSI_TGT_DEV_ATTR_RO(indx);
 static ssize_t target_stat_scsi_tgt_dev_show_attr_num_lus(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
-
 	return snprintf(page, PAGE_SIZE, "%u\n", LU_COUNT);
 }
 DEV_STAT_SCSI_TGT_DEV_ATTR_RO(num_lus);
@@ -219,60 +182,27 @@ DEV_STAT_SCSI_TGT_DEV_ATTR_RO(num_lus);
 static ssize_t target_stat_scsi_tgt_dev_show_attr_status(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-	char status[16];
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
-	if (!dev)
-		return -ENODEV;
-
-	switch (dev->dev_status) {
-	case TRANSPORT_DEVICE_ACTIVATED:
-		strcpy(status, "activated");
-		break;
-	case TRANSPORT_DEVICE_DEACTIVATED:
-		strcpy(status, "deactivated");
-		break;
-	case TRANSPORT_DEVICE_SHUTDOWN:
-		strcpy(status, "shutdown");
-		break;
-	case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
-	case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
-		strcpy(status, "offline");
-		break;
-	default:
-		sprintf(status, "unknown(%d)", dev->dev_status);
-		break;
-	}
-
-	return snprintf(page, PAGE_SIZE, "%s\n", status);
+	if (dev->export_count)
+		return snprintf(page, PAGE_SIZE, "activated");
+	else
+		return snprintf(page, PAGE_SIZE, "deactivated");
 }
 DEV_STAT_SCSI_TGT_DEV_ATTR_RO(status);
 
 static ssize_t target_stat_scsi_tgt_dev_show_attr_non_access_lus(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 	int non_accessible_lus;
 
-	if (!dev)
-		return -ENODEV;
-
-	switch (dev->dev_status) {
-	case TRANSPORT_DEVICE_ACTIVATED:
+	if (dev->export_count)
 		non_accessible_lus = 0;
-		break;
-	case TRANSPORT_DEVICE_DEACTIVATED:
-	case TRANSPORT_DEVICE_SHUTDOWN:
-	case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
-	case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
-	default:
+	else
 		non_accessible_lus = 1;
-		break;
-	}
 
 	return snprintf(page, PAGE_SIZE, "%u\n", non_accessible_lus);
 }
@@ -281,12 +211,8 @@ DEV_STAT_SCSI_TGT_DEV_ATTR_RO(non_access_lus);
 static ssize_t target_stat_scsi_tgt_dev_show_attr_resets(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets);
 }
@@ -335,13 +261,9 @@ static struct target_stat_scsi_lu_attribute target_stat_scsi_lu_##_name = \
 static ssize_t target_stat_scsi_lu_show_attr_inst(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_hba *hba = se_subdev->se_dev_hba;
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
+	struct se_hba *hba = dev->se_hba;
 
 	return snprintf(page, PAGE_SIZE, "%u\n", hba->hba_index);
 }
@@ -350,12 +272,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(inst);
 static ssize_t target_stat_scsi_lu_show_attr_dev(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	return snprintf(page, PAGE_SIZE, "%u\n", dev->dev_index);
 }
@@ -364,13 +282,6 @@ DEV_STAT_SCSI_LU_ATTR_RO(dev);
 static ssize_t target_stat_scsi_lu_show_attr_indx(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
-
 	return snprintf(page, PAGE_SIZE, "%u\n", SCSI_LU_INDEX);
 }
 DEV_STAT_SCSI_LU_ATTR_RO(indx);
@@ -378,12 +289,6 @@ DEV_STAT_SCSI_LU_ATTR_RO(indx);
 static ssize_t target_stat_scsi_lu_show_attr_lun(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
 	/* FIXME: scsiLuDefaultLun */
 	return snprintf(page, PAGE_SIZE, "%llu\n", (unsigned long long)0);
 }
@@ -392,35 +297,28 @@ DEV_STAT_SCSI_LU_ATTR_RO(lun);
 static ssize_t target_stat_scsi_lu_show_attr_lu_name(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
-	if (!dev)
-		return -ENODEV;
 	/* scsiLuWwnName */
 	return snprintf(page, PAGE_SIZE, "%s\n",
-			(strlen(dev->se_sub_dev->t10_wwn.unit_serial)) ?
-			dev->se_sub_dev->t10_wwn.unit_serial : "None");
+			(strlen(dev->t10_wwn.unit_serial)) ?
+			dev->t10_wwn.unit_serial : "None");
 }
 DEV_STAT_SCSI_LU_ATTR_RO(lu_name);
 
 static ssize_t target_stat_scsi_lu_show_attr_vend(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 	int i;
-	char str[sizeof(dev->se_sub_dev->t10_wwn.vendor)+1];
-
-	if (!dev)
-		return -ENODEV;
+	char str[sizeof(dev->t10_wwn.vendor)+1];
 
 	/* scsiLuVendorId */
-	for (i = 0; i < sizeof(dev->se_sub_dev->t10_wwn.vendor); i++)
-		str[i] = ISPRINT(dev->se_sub_dev->t10_wwn.vendor[i]) ?
-			dev->se_sub_dev->t10_wwn.vendor[i] : ' ';
+	for (i = 0; i < sizeof(dev->t10_wwn.vendor); i++)
+		str[i] = ISPRINT(dev->t10_wwn.vendor[i]) ?
+			dev->t10_wwn.vendor[i] : ' ';
 	str[i] = '\0';
 	return snprintf(page, PAGE_SIZE, "%s\n", str);
 }
@@ -429,19 +327,15 @@ DEV_STAT_SCSI_LU_ATTR_RO(vend);
 static ssize_t target_stat_scsi_lu_show_attr_prod(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 	int i;
-	char str[sizeof(dev->se_sub_dev->t10_wwn.model)+1];
-
-	if (!dev)
-		return -ENODEV;
+	char str[sizeof(dev->t10_wwn.model)+1];
 
 	/* scsiLuProductId */
-	for (i = 0; i < sizeof(dev->se_sub_dev->t10_wwn.vendor); i++)
-		str[i] = ISPRINT(dev->se_sub_dev->t10_wwn.model[i]) ?
-			dev->se_sub_dev->t10_wwn.model[i] : ' ';
+	for (i = 0; i < sizeof(dev->t10_wwn.vendor); i++)
+		str[i] = ISPRINT(dev->t10_wwn.model[i]) ?
+			dev->t10_wwn.model[i] : ' ';
 	str[i] = '\0';
 	return snprintf(page, PAGE_SIZE, "%s\n", str);
 }
@@ -450,19 +344,15 @@ DEV_STAT_SCSI_LU_ATTR_RO(prod);
 static ssize_t target_stat_scsi_lu_show_attr_rev(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 	int i;
-	char str[sizeof(dev->se_sub_dev->t10_wwn.revision)+1];
-
-	if (!dev)
-		return -ENODEV;
+	char str[sizeof(dev->t10_wwn.revision)+1];
 
 	/* scsiLuRevisionId */
-	for (i = 0; i < sizeof(dev->se_sub_dev->t10_wwn.revision); i++)
-		str[i] = ISPRINT(dev->se_sub_dev->t10_wwn.revision[i]) ?
-			dev->se_sub_dev->t10_wwn.revision[i] : ' ';
+	for (i = 0; i < sizeof(dev->t10_wwn.revision); i++)
+		str[i] = ISPRINT(dev->t10_wwn.revision[i]) ?
+			dev->t10_wwn.revision[i] : ' ';
 	str[i] = '\0';
 	return snprintf(page, PAGE_SIZE, "%s\n", str);
 }
@@ -471,12 +361,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(rev);
 static ssize_t target_stat_scsi_lu_show_attr_dev_type(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuPeripheralType */
 	return snprintf(page, PAGE_SIZE, "%u\n",
@@ -487,30 +373,18 @@ DEV_STAT_SCSI_LU_ATTR_RO(dev_type);
 static ssize_t target_stat_scsi_lu_show_attr_status(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuStatus */
 	return snprintf(page, PAGE_SIZE, "%s\n",
-		(dev->dev_status == TRANSPORT_DEVICE_ACTIVATED) ?
-		"available" : "notavailable");
+		(dev->export_count) ? "available" : "notavailable");
 }
 DEV_STAT_SCSI_LU_ATTR_RO(status);
 
 static ssize_t target_stat_scsi_lu_show_attr_state_bit(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
-
 	/* scsiLuState */
 	return snprintf(page, PAGE_SIZE, "exposed\n");
 }
@@ -519,12 +393,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(state_bit);
 static ssize_t target_stat_scsi_lu_show_attr_num_cmds(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuNumCommands */
 	return snprintf(page, PAGE_SIZE, "%llu\n",
@@ -535,12 +405,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(num_cmds);
 static ssize_t target_stat_scsi_lu_show_attr_read_mbytes(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuReadMegaBytes */
 	return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->read_bytes >> 20));
@@ -550,12 +416,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(read_mbytes);
 static ssize_t target_stat_scsi_lu_show_attr_write_mbytes(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuWrittenMegaBytes */
 	return snprintf(page, PAGE_SIZE, "%u\n", (u32)(dev->write_bytes >> 20));
@@ -565,12 +427,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(write_mbytes);
 static ssize_t target_stat_scsi_lu_show_attr_resets(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuInResets */
 	return snprintf(page, PAGE_SIZE, "%u\n", dev->num_resets);
@@ -580,13 +438,6 @@ DEV_STAT_SCSI_LU_ATTR_RO(resets);
 static ssize_t target_stat_scsi_lu_show_attr_full_stat(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
-
 	/* FIXME: scsiLuOutTaskSetFullStatus */
 	return snprintf(page, PAGE_SIZE, "%u\n", 0);
 }
@@ -595,13 +446,6 @@ DEV_STAT_SCSI_LU_ATTR_RO(full_stat);
 static ssize_t target_stat_scsi_lu_show_attr_hs_num_cmds(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
-
 	/* FIXME: scsiLuHSInCommands */
 	return snprintf(page, PAGE_SIZE, "%u\n", 0);
 }
@@ -610,12 +454,8 @@ DEV_STAT_SCSI_LU_ATTR_RO(hs_num_cmds);
 static ssize_t target_stat_scsi_lu_show_attr_creation_time(
 	struct se_dev_stat_grps *sgrps, char *page)
 {
-	struct se_subsystem_dev *se_subdev = container_of(sgrps,
-			struct se_subsystem_dev, dev_stat_grps);
-	struct se_device *dev = se_subdev->se_dev_ptr;
-
-	if (!dev)
-		return -ENODEV;
+	struct se_device *dev =
+		container_of(sgrps, struct se_device, dev_stat_grps);
 
 	/* scsiLuCreationTime */
 	return snprintf(page, PAGE_SIZE, "%u\n", (u32)(((u32)dev->creation_time -
@@ -662,20 +502,20 @@ static struct config_item_type target_stat_scsi_lu_cit = {
  * Called from target_core_configfs.c:target_core_make_subdev() to setup
  * the target statistics groups + configfs CITs located in target_core_stat.c
  */
-void target_stat_setup_dev_default_groups(struct se_subsystem_dev *se_subdev)
+void target_stat_setup_dev_default_groups(struct se_device *dev)
 {
-	struct config_group *dev_stat_grp = &se_subdev->dev_stat_grps.stat_group;
+	struct config_group *dev_stat_grp = &dev->dev_stat_grps.stat_group;
 
-	config_group_init_type_name(&se_subdev->dev_stat_grps.scsi_dev_group,
+	config_group_init_type_name(&dev->dev_stat_grps.scsi_dev_group,
 			"scsi_dev", &target_stat_scsi_dev_cit);
-	config_group_init_type_name(&se_subdev->dev_stat_grps.scsi_tgt_dev_group,
+	config_group_init_type_name(&dev->dev_stat_grps.scsi_tgt_dev_group,
 			"scsi_tgt_dev", &target_stat_scsi_tgt_dev_cit);
-	config_group_init_type_name(&se_subdev->dev_stat_grps.scsi_lu_group,
+	config_group_init_type_name(&dev->dev_stat_grps.scsi_lu_group,
 			"scsi_lu", &target_stat_scsi_lu_cit);
 
-	dev_stat_grp->default_groups[0] = &se_subdev->dev_stat_grps.scsi_dev_group;
-	dev_stat_grp->default_groups[1] = &se_subdev->dev_stat_grps.scsi_tgt_dev_group;
-	dev_stat_grp->default_groups[2] = &se_subdev->dev_stat_grps.scsi_lu_group;
+	dev_stat_grp->default_groups[0] = &dev->dev_stat_grps.scsi_dev_group;
+	dev_stat_grp->default_groups[1] = &dev->dev_stat_grps.scsi_tgt_dev_group;
+	dev_stat_grp->default_groups[2] = &dev->dev_stat_grps.scsi_lu_group;
 	dev_stat_grp->default_groups[3] = NULL;
 }
 
@@ -1161,7 +1001,7 @@ static ssize_t target_stat_scsi_transport_show_attr_dev_name(
 		return -ENODEV;
 	}
 	tpg = sep->sep_tpg;
-	wwn = &dev->se_sub_dev->t10_wwn;
+	wwn = &dev->t10_wwn;
 	/* scsiTransportDevName */
 	ret = snprintf(page, PAGE_SIZE, "%s+%s\n",
 			tpg->se_tpg_tfo->tpg_get_wwn(tpg),

drivers/target/target_core_tmr.c

@@ -3,8 +3,7 @@
  *
  * This file contains SPC-3 task management infrastructure
  *
- * Copyright (c) 2009,2010 Rising Tide Systems
- * Copyright (c) 2009,2010 Linux-iSCSI.org
+ * (c) Copyright 2009-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -371,7 +370,7 @@ int core_tmr_lun_reset(
 	 * which the command was received shall be completed with TASK ABORTED
 	 * status (see SAM-4).
 	 */
-	tas = dev->se_sub_dev->se_dev_attrib.emulate_tas;
+	tas = dev->dev_attrib.emulate_tas;
 	/*
 	 * Determine if this se_tmr is coming from a $FABRIC_MOD
 	 * or struct se_device passthrough..
@@ -399,10 +398,10 @@ int core_tmr_lun_reset(
 	 * LOGICAL UNIT RESET
 	 */
 	if (!preempt_and_abort_list &&
-	     (dev->dev_flags & DF_SPC2_RESERVATIONS)) {
+	     (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)) {
 		spin_lock(&dev->dev_reservation_lock);
 		dev->dev_reserved_node_acl = NULL;
-		dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
+		dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS;
 		spin_unlock(&dev->dev_reservation_lock);
 		pr_debug("LUN_RESET: SCSI-2 Released reservation\n");
 	}

drivers/target/target_core_tpg.c

@@ -3,10 +3,7 @@
  *
  * This file contains generic Target Portal Group related functions.
  *
- * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2002-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -619,6 +616,29 @@ int core_tpg_set_initiator_node_queue_depth(
 }
 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
 
+/*	core_tpg_set_initiator_node_tag():
+ *
+ *	Initiator nodeacl tags are not used internally, but may be used by
+ *	userspace to emulate aliases or groups.
+ *	Returns length of newly-set tag or -EINVAL.
+ */
+int core_tpg_set_initiator_node_tag(
+	struct se_portal_group *tpg,
+	struct se_node_acl *acl,
+	const char *new_tag)
+{
+	if (strlen(new_tag) >= MAX_ACL_TAG_SIZE)
+		return -EINVAL;
+
+	if (!strncmp("NULL", new_tag, 4)) {
+		acl->acl_tag[0] = '\0';
+		return 0;
+	}
+
+	return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag);
+}
+EXPORT_SYMBOL(core_tpg_set_initiator_node_tag);
+
 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
 {
 	/* Set in core_dev_setup_virtual_lun0() */
@@ -672,6 +692,7 @@ int core_tpg_register(
 	for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
 		lun = se_tpg->tpg_lun_list[i];
 		lun->unpacked_lun = i;
+		lun->lun_link_magic = SE_LUN_LINK_MAGIC;
 		lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
 		atomic_set(&lun->lun_acl_count, 0);
 		init_completion(&lun->lun_shutdown_comp);

drivers/target/target_core_transport.c

@@ -3,10 +3,7 @@
  *
  * This file contains the Generic Target Engine Core.
  *
- * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
- * Copyright (c) 2005, 2006, 2007 SBE, Inc.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2002-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -70,7 +67,6 @@ static void transport_handle_queue_full(struct se_cmd *cmd,
 static int transport_generic_get_mem(struct se_cmd *cmd);
 static int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
 static void transport_put_cmd(struct se_cmd *cmd);
-static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq);
 static void target_complete_ok_work(struct work_struct *work);
 
 int init_se_kmem_caches(void)
@@ -297,7 +293,7 @@ void transport_register_session(
 }
 EXPORT_SYMBOL(transport_register_session);
 
-void target_release_session(struct kref *kref)
+static void target_release_session(struct kref *kref)
 {
 	struct se_session *se_sess = container_of(kref,
 			struct se_session, sess_kref);
@@ -558,7 +554,8 @@ static void target_complete_failure_work(struct work_struct *work)
 {
 	struct se_cmd *cmd = container_of(work, struct se_cmd, work);
 
-	transport_generic_request_failure(cmd);
+	transport_generic_request_failure(cmd,
+			TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE);
 }
 
 /*
@@ -626,7 +623,6 @@ void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
 		complete(&cmd->t_transport_stop_comp);
 		return;
 	} else if (cmd->transport_state & CMD_T_FAILED) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 		INIT_WORK(&cmd->work, target_complete_failure_work);
 	} else {
 		INIT_WORK(&cmd->work, target_complete_ok_work);
@@ -659,7 +655,7 @@ static void target_add_to_state_list(struct se_cmd *cmd)
 static void transport_write_pending_qf(struct se_cmd *cmd);
 static void transport_complete_qf(struct se_cmd *cmd);
 
-static void target_qf_do_work(struct work_struct *work)
+void target_qf_do_work(struct work_struct *work)
 {
 	struct se_device *dev = container_of(work, struct se_device,
 					qf_work_queue);
@@ -712,29 +708,15 @@ void transport_dump_dev_state(
 	int *bl)
 {
 	*bl += sprintf(b + *bl, "Status: ");
-	switch (dev->dev_status) {
-	case TRANSPORT_DEVICE_ACTIVATED:
+	if (dev->export_count)
 		*bl += sprintf(b + *bl, "ACTIVATED");
-		break;
-	case TRANSPORT_DEVICE_DEACTIVATED:
+	else
 		*bl += sprintf(b + *bl, "DEACTIVATED");
-		break;
-	case TRANSPORT_DEVICE_SHUTDOWN:
-		*bl += sprintf(b + *bl, "SHUTDOWN");
-		break;
-	case TRANSPORT_DEVICE_OFFLINE_ACTIVATED:
-	case TRANSPORT_DEVICE_OFFLINE_DEACTIVATED:
-		*bl += sprintf(b + *bl, "OFFLINE");
-		break;
-	default:
-		*bl += sprintf(b + *bl, "UNKNOWN=%d", dev->dev_status);
-		break;
-	}
 
 	*bl += sprintf(b + *bl, "  Max Queue Depth: %d", dev->queue_depth);
 	*bl += sprintf(b + *bl, "  SectorSize: %u  HwMaxSectors: %u\n",
-		dev->se_sub_dev->se_dev_attrib.block_size,
-		dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
+		dev->dev_attrib.block_size,
+		dev->dev_attrib.hw_max_sectors);
 	*bl += sprintf(b + *bl, "        ");
 }
 
@@ -991,186 +973,8 @@ transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83)
 }
 EXPORT_SYMBOL(transport_set_vpd_ident);
 
-static void core_setup_task_attr_emulation(struct se_device *dev)
-{
-	/*
-	 * If this device is from Target_Core_Mod/pSCSI, disable the
-	 * SAM Task Attribute emulation.
-	 *
-	 * This is currently not available in upsream Linux/SCSI Target
-	 * mode code, and is assumed to be disabled while using TCM/pSCSI.
-	 */
-	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
-		dev->dev_task_attr_type = SAM_TASK_ATTR_PASSTHROUGH;
-		return;
-	}
-
-	dev->dev_task_attr_type = SAM_TASK_ATTR_EMULATED;
-	pr_debug("%s: Using SAM_TASK_ATTR_EMULATED for SPC: 0x%02x"
-		" device\n", dev->transport->name,
-		dev->transport->get_device_rev(dev));
-}
-
-static void scsi_dump_inquiry(struct se_device *dev)
-{
-	struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn;
-	char buf[17];
-	int i, device_type;
-	/*
-	 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
-	 */
-	for (i = 0; i < 8; i++)
-		if (wwn->vendor[i] >= 0x20)
-			buf[i] = wwn->vendor[i];
-		else
-			buf[i] = ' ';
-	buf[i] = '\0';
-	pr_debug("  Vendor: %s\n", buf);
-
-	for (i = 0; i < 16; i++)
-		if (wwn->model[i] >= 0x20)
-			buf[i] = wwn->model[i];
-		else
-			buf[i] = ' ';
-	buf[i] = '\0';
-	pr_debug("  Model: %s\n", buf);
-
-	for (i = 0; i < 4; i++)
-		if (wwn->revision[i] >= 0x20)
-			buf[i] = wwn->revision[i];
-		else
-			buf[i] = ' ';
-	buf[i] = '\0';
-	pr_debug("  Revision: %s\n", buf);
-
-	device_type = dev->transport->get_device_type(dev);
-	pr_debug("  Type:   %s ", scsi_device_type(device_type));
-	pr_debug("                 ANSI SCSI revision: %02x\n",
-				dev->transport->get_device_rev(dev));
-}
-
-struct se_device *transport_add_device_to_core_hba(
-	struct se_hba *hba,
-	struct se_subsystem_api *transport,
-	struct se_subsystem_dev *se_dev,
-	u32 device_flags,
-	void *transport_dev,
-	struct se_dev_limits *dev_limits,
-	const char *inquiry_prod,
-	const char *inquiry_rev)
-{
-	int force_pt;
-	struct se_device  *dev;
-
-	dev = kzalloc(sizeof(struct se_device), GFP_KERNEL);
-	if (!dev) {
-		pr_err("Unable to allocate memory for se_dev_t\n");
-		return NULL;
-	}
-
-	dev->dev_flags		= device_flags;
-	dev->dev_status		|= TRANSPORT_DEVICE_DEACTIVATED;
-	dev->dev_ptr		= transport_dev;
-	dev->se_hba		= hba;
-	dev->se_sub_dev		= se_dev;
-	dev->transport		= transport;
-	INIT_LIST_HEAD(&dev->dev_list);
-	INIT_LIST_HEAD(&dev->dev_sep_list);
-	INIT_LIST_HEAD(&dev->dev_tmr_list);
-	INIT_LIST_HEAD(&dev->delayed_cmd_list);
-	INIT_LIST_HEAD(&dev->state_list);
-	INIT_LIST_HEAD(&dev->qf_cmd_list);
-	spin_lock_init(&dev->execute_task_lock);
-	spin_lock_init(&dev->delayed_cmd_lock);
-	spin_lock_init(&dev->dev_reservation_lock);
-	spin_lock_init(&dev->dev_status_lock);
-	spin_lock_init(&dev->se_port_lock);
-	spin_lock_init(&dev->se_tmr_lock);
-	spin_lock_init(&dev->qf_cmd_lock);
-	atomic_set(&dev->dev_ordered_id, 0);
-
-	se_dev_set_default_attribs(dev, dev_limits);
-
-	dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
-	dev->creation_time = get_jiffies_64();
-	spin_lock_init(&dev->stats_lock);
-
-	spin_lock(&hba->device_lock);
-	list_add_tail(&dev->dev_list, &hba->hba_dev_list);
-	hba->dev_count++;
-	spin_unlock(&hba->device_lock);
-	/*
-	 * Setup the SAM Task Attribute emulation for struct se_device
-	 */
-	core_setup_task_attr_emulation(dev);
-	/*
-	 * Force PR and ALUA passthrough emulation with internal object use.
-	 */
-	force_pt = (hba->hba_flags & HBA_FLAGS_INTERNAL_USE);
-	/*
-	 * Setup the Reservations infrastructure for struct se_device
-	 */
-	core_setup_reservations(dev, force_pt);
-	/*
-	 * Setup the Asymmetric Logical Unit Assignment for struct se_device
-	 */
-	if (core_setup_alua(dev, force_pt) < 0)
-		goto err_dev_list;
-
-	/*
-	 * Startup the struct se_device processing thread
-	 */
-	dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
-				      dev->transport->name);
-	if (!dev->tmr_wq) {
-		pr_err("Unable to create tmr workqueue for %s\n",
-			dev->transport->name);
-		goto err_dev_list;
-	}
-	/*
-	 * Setup work_queue for QUEUE_FULL
-	 */
-	INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
-	/*
-	 * Preload the initial INQUIRY const values if we are doing
-	 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
-	 * passthrough because this is being provided by the backend LLD.
-	 * This is required so that transport_get_inquiry() copies these
-	 * originals once back into DEV_T10_WWN(dev) for the virtual device
-	 * setup.
-	 */
-	if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
-		if (!inquiry_prod || !inquiry_rev) {
-			pr_err("All non TCM/pSCSI plugins require"
-				" INQUIRY consts\n");
-			goto err_wq;
-		}
-
-		strncpy(&dev->se_sub_dev->t10_wwn.vendor[0], "LIO-ORG", 8);
-		strncpy(&dev->se_sub_dev->t10_wwn.model[0], inquiry_prod, 16);
-		strncpy(&dev->se_sub_dev->t10_wwn.revision[0], inquiry_rev, 4);
-	}
-	scsi_dump_inquiry(dev);
-
-	return dev;
-
-err_wq:
-	destroy_workqueue(dev->tmr_wq);
-err_dev_list:
-	spin_lock(&hba->device_lock);
-	list_del(&dev->dev_list);
-	hba->dev_count--;
-	spin_unlock(&hba->device_lock);
-
-	se_release_vpd_for_dev(dev);
-
-	kfree(dev);
-
-	return NULL;
-}
-EXPORT_SYMBOL(transport_add_device_to_core_hba);
-
-int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
+sense_reason_t
+target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
 {
 	struct se_device *dev = cmd->se_dev;
 
@@ -1185,18 +989,18 @@ int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
 		if (cmd->data_direction == DMA_TO_DEVICE) {
 			pr_err("Rejecting underflow/overflow"
 					" WRITE data\n");
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		}
 		/*
 		 * Reject READ_* or WRITE_* with overflow/underflow for
 		 * type SCF_SCSI_DATA_CDB.
 		 */
-		if (dev->se_sub_dev->se_dev_attrib.block_size != 512)  {
+		if (dev->dev_attrib.block_size != 512)  {
 			pr_err("Failing OVERFLOW/UNDERFLOW for LBA op"
 				" CDB on non 512-byte sector setup subsystem"
 				" plugin: %s\n", dev->transport->name);
 			/* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
-			goto out_invalid_cdb_field;
+			return TCM_INVALID_CDB_FIELD;
 		}
 		/*
 		 * For the overflow case keep the existing fabric provided
@@ -1216,10 +1020,6 @@ int target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
 
 	return 0;
 
-out_invalid_cdb_field:
-	cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-	cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-	return -EINVAL;
 }
 
 /*
@@ -1259,45 +1059,41 @@ void transport_init_se_cmd(
 }
 EXPORT_SYMBOL(transport_init_se_cmd);
 
-static int transport_check_alloc_task_attr(struct se_cmd *cmd)
+static sense_reason_t
+transport_check_alloc_task_attr(struct se_cmd *cmd)
 {
+	struct se_device *dev = cmd->se_dev;
+
 	/*
 	 * Check if SAM Task Attribute emulation is enabled for this
 	 * struct se_device storage object
 	 */
-	if (cmd->se_dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
 		return 0;
 
 	if (cmd->sam_task_attr == MSG_ACA_TAG) {
 		pr_debug("SAM Task Attribute ACA"
 			" emulation is not supported\n");
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 	/*
 	 * Used to determine when ORDERED commands should go from
 	 * Dormant to Active status.
 	 */
-	cmd->se_ordered_id = atomic_inc_return(&cmd->se_dev->dev_ordered_id);
+	cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id);
 	smp_mb__after_atomic_inc();
 	pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n",
 			cmd->se_ordered_id, cmd->sam_task_attr,
-			cmd->se_dev->transport->name);
+			dev->transport->name);
 	return 0;
 }
 
-/*	target_setup_cmd_from_cdb():
- *
- *	Called from fabric RX Thread.
- */
-int target_setup_cmd_from_cdb(
-	struct se_cmd *cmd,
-	unsigned char *cdb)
+sense_reason_t
+target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
 {
-	struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
-	u32 pr_reg_type = 0;
-	u8 alua_ascq = 0;
+	struct se_device *dev = cmd->se_dev;
 	unsigned long flags;
-	int ret;
+	sense_reason_t ret;
 
 	/*
 	 * Ensure that the received CDB is less than the max (252 + 8) bytes
@@ -1307,9 +1103,7 @@ int target_setup_cmd_from_cdb(
 		pr_err("Received SCSI CDB with command_size: %d that"
 			" exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
 			scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE);
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
+		return TCM_INVALID_CDB_FIELD;
 	}
 	/*
 	 * If the received CDB is larger than TCM_MAX_COMMAND_SIZE,
@@ -1324,10 +1118,7 @@ int target_setup_cmd_from_cdb(
 				" %u > sizeof(cmd->__t_task_cdb): %lu ops\n",
 				scsi_command_size(cdb),
 				(unsigned long)sizeof(cmd->__t_task_cdb));
-			cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-			cmd->scsi_sense_reason =
-					TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-			return -ENOMEM;
+			return TCM_OUT_OF_RESOURCES;
 		}
 	} else
 		cmd->t_task_cdb = &cmd->__t_task_cdb[0];
@@ -1339,70 +1130,30 @@ int target_setup_cmd_from_cdb(
 	/*
 	 * Check for an existing UNIT ATTENTION condition
 	 */
-	if (core_scsi3_ua_check(cmd, cdb) < 0) {
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_CHECK_CONDITION_UNIT_ATTENTION;
-		return -EINVAL;
-	}
+	ret = target_scsi3_ua_check(cmd);
+	if (ret)
+		return ret;
 
-	ret = su_dev->t10_alua.alua_state_check(cmd, cdb, &alua_ascq);
-	if (ret != 0) {
-		/*
-		 * Set SCSI additional sense code (ASC) to 'LUN Not Accessible';
-		 * The ALUA additional sense code qualifier (ASCQ) is determined
-		 * by the ALUA primary or secondary access state..
-		 */
-		if (ret > 0) {
-			pr_debug("[%s]: ALUA TG Port not available, "
-				"SenseKey: NOT_READY, ASC/ASCQ: "
-				"0x04/0x%02x\n",
-				cmd->se_tfo->get_fabric_name(), alua_ascq);
-
-			transport_set_sense_codes(cmd, 0x04, alua_ascq);
-			cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-			cmd->scsi_sense_reason = TCM_CHECK_CONDITION_NOT_READY;
-			return -EINVAL;
-		}
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
-	}
+	ret = target_alua_state_check(cmd);
+	if (ret)
+		return ret;
 
-	/*
-	 * Check status for SPC-3 Persistent Reservations
-	 */
-	if (su_dev->t10_pr.pr_ops.t10_reservation_check(cmd, &pr_reg_type)) {
-		if (su_dev->t10_pr.pr_ops.t10_seq_non_holder(
-					cmd, cdb, pr_reg_type) != 0) {
-			cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-			cmd->se_cmd_flags |= SCF_SCSI_RESERVATION_CONFLICT;
-			cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
-			cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
-			return -EBUSY;
-		}
-		/*
-		 * This means the CDB is allowed for the SCSI Initiator port
-		 * when said port is *NOT* holding the legacy SPC-2 or
-		 * SPC-3 Persistent Reservation.
-		 */
-	}
+	ret = target_check_reservation(cmd);
+	if (ret)
+		return ret;
 
-	ret = cmd->se_dev->transport->parse_cdb(cmd);
-	if (ret < 0)
+	ret = dev->transport->parse_cdb(cmd);
+	if (ret)
+		return ret;
+
+	ret = transport_check_alloc_task_attr(cmd);
+	if (ret)
 		return ret;
 
 	spin_lock_irqsave(&cmd->t_state_lock, flags);
 	cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
 	spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
-	/*
-	 * Check for SAM Task Attribute Emulation
-	 */
-	if (transport_check_alloc_task_attr(cmd) < 0) {
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
-	}
 	spin_lock(&cmd->se_lun->lun_sep_lock);
 	if (cmd->se_lun->lun_sep)
 		cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
@@ -1418,7 +1169,7 @@ EXPORT_SYMBOL(target_setup_cmd_from_cdb);
 int transport_handle_cdb_direct(
 	struct se_cmd *cmd)
 {
-	int ret;
+	sense_reason_t ret;
 
 	if (!cmd->se_lun) {
 		dump_stack();
@@ -1448,13 +1199,41 @@ int transport_handle_cdb_direct(
 	 * and call transport_generic_request_failure() if necessary..
 	 */
 	ret = transport_generic_new_cmd(cmd);
-	if (ret < 0)
-		transport_generic_request_failure(cmd);
-
+	if (ret)
+		transport_generic_request_failure(cmd, ret);
 	return 0;
 }
 EXPORT_SYMBOL(transport_handle_cdb_direct);
 
+static sense_reason_t
+transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
+		u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count)
+{
+	if (!sgl || !sgl_count)
+		return 0;
+
+	/*
+	 * Reject SCSI data overflow with map_mem_to_cmd() as incoming
+	 * scatterlists already have been set to follow what the fabric
+	 * passes for the original expected data transfer length.
+	 */
+	if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
+		pr_warn("Rejecting SCSI DATA overflow for fabric using"
+			" SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n");
+		return TCM_INVALID_CDB_FIELD;
+	}
+
+	cmd->t_data_sg = sgl;
+	cmd->t_data_nents = sgl_count;
+
+	if (sgl_bidi && sgl_bidi_count) {
+		cmd->t_bidi_data_sg = sgl_bidi;
+		cmd->t_bidi_data_nents = sgl_bidi_count;
+	}
+	cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC;
+	return 0;
+}
+
 /*
  * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized
  * 			 se_cmd + use pre-allocated SGL memory.
@@ -1487,7 +1266,8 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
 		struct scatterlist *sgl_bidi, u32 sgl_bidi_count)
 {
 	struct se_portal_group *se_tpg;
-	int rc;
+	sense_reason_t rc;
+	int ret;
 
 	se_tpg = se_sess->se_tpg;
 	BUG_ON(!se_tpg);
@@ -1508,9 +1288,9 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
 	 * for fabrics using TARGET_SCF_ACK_KREF that expect a second
 	 * kref_put() to happen during fabric packet acknowledgement.
 	 */
-	rc = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
-	if (rc)
-		return rc;
+	ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
+	if (ret)
+		return ret;
 	/*
 	 * Signal bidirectional data payloads to target-core
 	 */
@@ -1519,16 +1299,16 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
 	/*
 	 * Locate se_lun pointer and attach it to struct se_cmd
 	 */
-	if (transport_lookup_cmd_lun(se_cmd, unpacked_lun) < 0) {
-		transport_send_check_condition_and_sense(se_cmd,
-				se_cmd->scsi_sense_reason, 0);
+	rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun);
+	if (rc) {
+		transport_send_check_condition_and_sense(se_cmd, rc, 0);
 		target_put_sess_cmd(se_sess, se_cmd);
 		return 0;
 	}
 
 	rc = target_setup_cmd_from_cdb(se_cmd, cdb);
 	if (rc != 0) {
-		transport_generic_request_failure(se_cmd);
+		transport_generic_request_failure(se_cmd, rc);
 		return 0;
 	}
 	/*
@@ -1563,7 +1343,7 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
 		rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count,
 				sgl_bidi, sgl_bidi_count);
 		if (rc != 0) {
-			transport_generic_request_failure(se_cmd);
+			transport_generic_request_failure(se_cmd, rc);
 			return 0;
 		}
 	}
@@ -1709,16 +1489,17 @@ bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags)
 /*
  * Handle SAM-esque emulation for generic transport request failures.
  */
-void transport_generic_request_failure(struct se_cmd *cmd)
+void transport_generic_request_failure(struct se_cmd *cmd,
+		sense_reason_t sense_reason)
 {
 	int ret = 0;
 
 	pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
 		" CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd),
 		cmd->t_task_cdb[0]);
-	pr_debug("-----[ i_state: %d t_state: %d scsi_sense_reason: %d\n",
+	pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n",
 		cmd->se_tfo->get_cmd_state(cmd),
-		cmd->t_state, cmd->scsi_sense_reason);
+		cmd->t_state, sense_reason);
 	pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
 		(cmd->transport_state & CMD_T_ACTIVE) != 0,
 		(cmd->transport_state & CMD_T_STOP) != 0,
@@ -1727,10 +1508,9 @@ void transport_generic_request_failure(struct se_cmd *cmd)
 	/*
 	 * For SAM Task Attribute emulation for failed struct se_cmd
 	 */
-	if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
-		transport_complete_task_attr(cmd);
+	transport_complete_task_attr(cmd);
 
-	switch (cmd->scsi_sense_reason) {
+	switch (sense_reason) {
 	case TCM_NON_EXISTENT_LUN:
 	case TCM_UNSUPPORTED_SCSI_OPCODE:
 	case TCM_INVALID_CDB_FIELD:
@@ -1743,6 +1523,9 @@ void transport_generic_request_failure(struct se_cmd *cmd)
 	case TCM_CHECK_CONDITION_UNIT_ATTENTION:
 	case TCM_CHECK_CONDITION_NOT_READY:
 		break;
+	case TCM_OUT_OF_RESOURCES:
+		sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+		break;
 	case TCM_RESERVATION_CONFLICT:
 		/*
 		 * No SENSE Data payload for this case, set SCSI Status
@@ -1759,7 +1542,7 @@ void transport_generic_request_failure(struct se_cmd *cmd)
 		 * See spc4r17, section 7.4.6 Control Mode Page, Table 349
 		 */
 		if (cmd->se_sess &&
-		    cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2)
+		    cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2)
 			core_scsi3_ua_allocate(cmd->se_sess->se_node_acl,
 				cmd->orig_fe_lun, 0x2C,
 				ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
@@ -1770,13 +1553,12 @@ void transport_generic_request_failure(struct se_cmd *cmd)
 		goto check_stop;
 	default:
 		pr_err("Unknown transport error for CDB 0x%02x: %d\n",
-			cmd->t_task_cdb[0], cmd->scsi_sense_reason);
-		cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+			cmd->t_task_cdb[0], sense_reason);
+		sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
 		break;
 	}
 
-	ret = transport_send_check_condition_and_sense(cmd,
-			cmd->scsi_sense_reason, 0);
+	ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0);
 	if (ret == -EAGAIN || ret == -ENOMEM)
 		goto queue_full;
 
@@ -1794,69 +1576,30 @@ EXPORT_SYMBOL(transport_generic_request_failure);
 
 static void __target_execute_cmd(struct se_cmd *cmd)
 {
-	int error = 0;
+	sense_reason_t ret;
 
 	spin_lock_irq(&cmd->t_state_lock);
 	cmd->transport_state |= (CMD_T_BUSY|CMD_T_SENT);
 	spin_unlock_irq(&cmd->t_state_lock);
 
-	if (cmd->execute_cmd)
-		error = cmd->execute_cmd(cmd);
+	if (cmd->execute_cmd) {
+		ret = cmd->execute_cmd(cmd);
+		if (ret) {
+			spin_lock_irq(&cmd->t_state_lock);
+			cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT);
+			spin_unlock_irq(&cmd->t_state_lock);
 
-	if (error) {
-		spin_lock_irq(&cmd->t_state_lock);
-		cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT);
-		spin_unlock_irq(&cmd->t_state_lock);
-
-		transport_generic_request_failure(cmd);
+			transport_generic_request_failure(cmd, ret);
+		}
 	}
 }
 
-void target_execute_cmd(struct se_cmd *cmd)
+static bool target_handle_task_attr(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 
-	/*
-	 * If the received CDB has aleady been aborted stop processing it here.
-	 */
-	if (transport_check_aborted_status(cmd, 1)) {
-		complete(&cmd->t_transport_stop_comp);
-		return;
-	}
-
-	/*
-	 * Determine if IOCTL context caller in requesting the stopping of this
-	 * command for LUN shutdown purposes.
-	 */
-	spin_lock_irq(&cmd->t_state_lock);
-	if (cmd->transport_state & CMD_T_LUN_STOP) {
-		pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n",
-			__func__, __LINE__, cmd->se_tfo->get_task_tag(cmd));
-
-		cmd->transport_state &= ~CMD_T_ACTIVE;
-		spin_unlock_irq(&cmd->t_state_lock);
-		complete(&cmd->transport_lun_stop_comp);
-		return;
-	}
-	/*
-	 * Determine if frontend context caller is requesting the stopping of
-	 * this command for frontend exceptions.
-	 */
-	if (cmd->transport_state & CMD_T_STOP) {
-		pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
-			__func__, __LINE__,
-			cmd->se_tfo->get_task_tag(cmd));
-
-		spin_unlock_irq(&cmd->t_state_lock);
-		complete(&cmd->t_transport_stop_comp);
-		return;
-	}
-
-	cmd->t_state = TRANSPORT_PROCESSING;
-	spin_unlock_irq(&cmd->t_state_lock);
-
-	if (dev->dev_task_attr_type != SAM_TASK_ATTR_EMULATED)
-		goto execute;
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+		return false;
 
 	/*
 	 * Check for the existence of HEAD_OF_QUEUE, and if true return 1
@@ -1867,7 +1610,7 @@ void target_execute_cmd(struct se_cmd *cmd)
 		pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, "
 			 "se_ordered_id: %u\n",
 			 cmd->t_task_cdb[0], cmd->se_ordered_id);
-		goto execute;
+		return false;
 	case MSG_ORDERED_TAG:
 		atomic_inc(&dev->dev_ordered_sync);
 		smp_mb__after_atomic_inc();
@@ -1881,7 +1624,7 @@ void target_execute_cmd(struct se_cmd *cmd)
 		 * exist that need to be completed first.
 		 */
 		if (!atomic_read(&dev->simple_cmds))
-			goto execute;
+			return false;
 		break;
 	default:
 		/*
@@ -1892,23 +1635,63 @@ void target_execute_cmd(struct se_cmd *cmd)
 		break;
 	}
 
-	if (atomic_read(&dev->dev_ordered_sync) != 0) {
-		spin_lock(&dev->delayed_cmd_lock);
-		list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list);
-		spin_unlock(&dev->delayed_cmd_lock);
+	if (atomic_read(&dev->dev_ordered_sync) == 0)
+		return false;
 
-		pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to"
-			" delayed CMD list, se_ordered_id: %u\n",
-			cmd->t_task_cdb[0], cmd->sam_task_attr,
-			cmd->se_ordered_id);
+	spin_lock(&dev->delayed_cmd_lock);
+	list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list);
+	spin_unlock(&dev->delayed_cmd_lock);
+
+	pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to"
+		" delayed CMD list, se_ordered_id: %u\n",
+		cmd->t_task_cdb[0], cmd->sam_task_attr,
+		cmd->se_ordered_id);
+	return true;
+}
+
+void target_execute_cmd(struct se_cmd *cmd)
+{
+	/*
+	 * If the received CDB has aleady been aborted stop processing it here.
+	 */
+	if (transport_check_aborted_status(cmd, 1)) {
+		complete(&cmd->transport_lun_stop_comp);
 		return;
 	}
 
-execute:
 	/*
-	 * Otherwise, no ORDERED task attributes exist..
+	 * Determine if IOCTL context caller in requesting the stopping of this
+	 * command for LUN shutdown purposes.
 	 */
-	__target_execute_cmd(cmd);
+	spin_lock_irq(&cmd->t_state_lock);
+	if (cmd->transport_state & CMD_T_LUN_STOP) {
+		pr_debug("%s:%d CMD_T_LUN_STOP for ITT: 0x%08x\n",
+			__func__, __LINE__, cmd->se_tfo->get_task_tag(cmd));
+
+		cmd->transport_state &= ~CMD_T_ACTIVE;
+		spin_unlock_irq(&cmd->t_state_lock);
+		complete(&cmd->transport_lun_stop_comp);
+		return;
+	}
+	/*
+	 * Determine if frontend context caller is requesting the stopping of
+	 * this command for frontend exceptions.
+	 */
+	if (cmd->transport_state & CMD_T_STOP) {
+		pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
+			__func__, __LINE__,
+			cmd->se_tfo->get_task_tag(cmd));
+
+		spin_unlock_irq(&cmd->t_state_lock);
+		complete(&cmd->t_transport_stop_comp);
+		return;
+	}
+
+	cmd->t_state = TRANSPORT_PROCESSING;
+	spin_unlock_irq(&cmd->t_state_lock);
+
+	if (!target_handle_task_attr(cmd))
+		__target_execute_cmd(cmd);
 }
 EXPORT_SYMBOL(target_execute_cmd);
 
@@ -1947,6 +1730,9 @@ static void transport_complete_task_attr(struct se_cmd *cmd)
 {
 	struct se_device *dev = cmd->se_dev;
 
+	if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
+		return;
+
 	if (cmd->sam_task_attr == MSG_SIMPLE_TAG) {
 		atomic_dec(&dev->simple_cmds);
 		smp_mb__after_atomic_dec();
@@ -1975,8 +1761,7 @@ static void transport_complete_qf(struct se_cmd *cmd)
 {
 	int ret = 0;
 
-	if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
-		transport_complete_task_attr(cmd);
+	transport_complete_task_attr(cmd);
 
 	if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
 		ret = cmd->se_tfo->queue_status(cmd);
@@ -2034,8 +1819,8 @@ static void target_complete_ok_work(struct work_struct *work)
 	 * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task
 	 * Attribute.
 	 */
-	if (cmd->se_dev->dev_task_attr_type == SAM_TASK_ATTR_EMULATED)
-		transport_complete_task_attr(cmd);
+	transport_complete_task_attr(cmd);
+
 	/*
 	 * Check to schedule QUEUE_FULL work, or execute an existing
 	 * cmd->transport_qf_callback()
@@ -2183,9 +1968,10 @@ static void transport_put_cmd(struct se_cmd *cmd)
 	unsigned long flags;
 
 	spin_lock_irqsave(&cmd->t_state_lock, flags);
-	if (atomic_read(&cmd->t_fe_count)) {
-		if (!atomic_dec_and_test(&cmd->t_fe_count))
-			goto out_busy;
+	if (atomic_read(&cmd->t_fe_count) &&
+	    !atomic_dec_and_test(&cmd->t_fe_count)) {
+		spin_unlock_irqrestore(&cmd->t_state_lock, flags);
+		return;
 	}
 
 	if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
@@ -2197,56 +1983,7 @@ static void transport_put_cmd(struct se_cmd *cmd)
 	transport_free_pages(cmd);
 	transport_release_cmd(cmd);
 	return;
-out_busy:
-	spin_unlock_irqrestore(&cmd->t_state_lock, flags);
-}
-
-/*
- * transport_generic_map_mem_to_cmd - Use fabric-alloced pages instead of
- * allocating in the core.
- * @cmd:  Associated se_cmd descriptor
- * @mem:  SGL style memory for TCM WRITE / READ
- * @sg_mem_num: Number of SGL elements
- * @mem_bidi_in: SGL style memory for TCM BIDI READ
- * @sg_mem_bidi_num: Number of BIDI READ SGL elements
- *
- * Return: nonzero return cmd was rejected for -ENOMEM or inproper usage
- * of parameters.
- */
-int transport_generic_map_mem_to_cmd(
-	struct se_cmd *cmd,
-	struct scatterlist *sgl,
-	u32 sgl_count,
-	struct scatterlist *sgl_bidi,
-	u32 sgl_bidi_count)
-{
-	if (!sgl || !sgl_count)
-		return 0;
-
-	/*
-	 * Reject SCSI data overflow with map_mem_to_cmd() as incoming
-	 * scatterlists already have been set to follow what the fabric
-	 * passes for the original expected data transfer length.
-	 */
-	if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
-		pr_warn("Rejecting SCSI DATA overflow for fabric using"
-			" SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n");
-		cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-		cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
-		return -EINVAL;
-	}
-
-	cmd->t_data_sg = sgl;
-	cmd->t_data_nents = sgl_count;
-
-	if (sgl_bidi && sgl_bidi_count) {
-		cmd->t_bidi_data_sg = sgl_bidi;
-		cmd->t_bidi_data_nents = sgl_bidi_count;
-	}
-	cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC;
-	return 0;
 }
-EXPORT_SYMBOL(transport_generic_map_mem_to_cmd);
 
 void *transport_kmap_data_sg(struct se_cmd *cmd)
 {
@@ -2268,10 +2005,8 @@ void *transport_kmap_data_sg(struct se_cmd *cmd)
 
 	/* >1 page. use vmap */
 	pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL);
-	if (!pages) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	if (!pages)
 		return NULL;
-	}
 
 	/* convert sg[] to pages[] */
 	for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) {
@@ -2280,10 +2015,8 @@ void *transport_kmap_data_sg(struct se_cmd *cmd)
 
 	cmd->t_data_vmap = vmap(pages, cmd->t_data_nents,  VM_MAP, PAGE_KERNEL);
 	kfree(pages);
-	if (!cmd->t_data_vmap) {
-		cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+	if (!cmd->t_data_vmap)
 		return NULL;
-	}
 
 	return cmd->t_data_vmap + cmd->t_data_sg[0].offset;
 }
@@ -2349,7 +2082,8 @@ out:
  * might not have the payload yet, so notify the fabric via a call to
  * ->write_pending instead. Otherwise place it on the execution queue.
  */
-int transport_generic_new_cmd(struct se_cmd *cmd)
+sense_reason_t
+transport_generic_new_cmd(struct se_cmd *cmd)
 {
 	int ret = 0;
 
@@ -2362,7 +2096,7 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
 	    cmd->data_length) {
 		ret = transport_generic_get_mem(cmd);
 		if (ret < 0)
-			goto out_fail;
+			return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 	}
 
 	atomic_inc(&cmd->t_fe_count);
@@ -2388,14 +2122,11 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
 	if (ret == -EAGAIN || ret == -ENOMEM)
 		goto queue_full;
 
-	if (ret < 0)
-		return ret;
-	return 1;
+	/* fabric drivers should only return -EAGAIN or -ENOMEM as error */
+	WARN_ON(ret);
+
+	return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
 
-out_fail:
-	cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-	cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-	return -EINVAL;
 queue_full:
 	pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd);
 	cmd->t_state = TRANSPORT_COMPLETE_QF_WP;
@@ -2839,21 +2570,9 @@ static int transport_get_sense_codes(
 	return 0;
 }
 
-static int transport_set_sense_codes(
-	struct se_cmd *cmd,
-	u8 asc,
-	u8 ascq)
-{
-	cmd->scsi_asc = asc;
-	cmd->scsi_ascq = ascq;
-
-	return 0;
-}
-
-int transport_send_check_condition_and_sense(
-	struct se_cmd *cmd,
-	u8 reason,
-	int from_transport)
+int
+transport_send_check_condition_and_sense(struct se_cmd *cmd,
+		sense_reason_t reason, int from_transport)
 {
 	unsigned char *buffer = cmd->sense_buffer;
 	unsigned long flags;
@@ -3044,23 +2763,19 @@ EXPORT_SYMBOL(transport_send_check_condition_and_sense);
 
 int transport_check_aborted_status(struct se_cmd *cmd, int send_status)
 {
-	int ret = 0;
+	if (!(cmd->transport_state & CMD_T_ABORTED))
+		return 0;
 
-	if (cmd->transport_state & CMD_T_ABORTED) {
-		if (!send_status ||
-		     (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS))
-			return 1;
+	if (!send_status || (cmd->se_cmd_flags & SCF_SENT_DELAYED_TAS))
+		return 1;
 
-		pr_debug("Sending delayed SAM_STAT_TASK_ABORTED"
-			" status for CDB: 0x%02x ITT: 0x%08x\n",
-			cmd->t_task_cdb[0],
-			cmd->se_tfo->get_task_tag(cmd));
+	pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n",
+		 cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd));
 
-		cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS;
-		cmd->se_tfo->queue_status(cmd);
-		ret = 1;
-	}
-	return ret;
+	cmd->se_cmd_flags |= SCF_SENT_DELAYED_TAS;
+	cmd->se_tfo->queue_status(cmd);
+
+	return 1;
 }
 EXPORT_SYMBOL(transport_check_aborted_status);
 

drivers/target/target_core_ua.c

@@ -3,8 +3,7 @@
  *
  * This file contains logic for SPC-3 Unit Attention emulation
  *
- * Copyright (c) 2009,2010 Rising Tide Systems
- * Copyright (c) 2009,2010 Linux-iSCSI.org
+ * (c) Copyright 2009-2012 RisingTide Systems LLC.
  *
  * Nicholas A. Bellinger <nab@kernel.org>
  *
@@ -38,9 +37,8 @@
 #include "target_core_pr.h"
 #include "target_core_ua.h"
 
-int core_scsi3_ua_check(
-	struct se_cmd *cmd,
-	unsigned char *cdb)
+sense_reason_t
+target_scsi3_ua_check(struct se_cmd *cmd)
 {
 	struct se_dev_entry *deve;
 	struct se_session *sess = cmd->se_sess;
@@ -71,16 +69,14 @@ int core_scsi3_ua_check(
 	 *    was received, then the device server shall process the command
 	 *    and either:
 	 */
-	switch (cdb[0]) {
+	switch (cmd->t_task_cdb[0]) {
 	case INQUIRY:
 	case REPORT_LUNS:
 	case REQUEST_SENSE:
 		return 0;
 	default:
-		return -EINVAL;
+		return TCM_CHECK_CONDITION_UNIT_ATTENTION;
 	}
-
-	return -EINVAL;
 }
 
 int core_scsi3_ua_allocate(
@@ -237,7 +233,7 @@ void core_scsi3_ua_for_check_condition(
 		 * highest priority UNIT_ATTENTION and ASC/ASCQ without
 		 * clearing it.
 		 */
-		if (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl != 0) {
+		if (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) {
 			*asc = ua->ua_asc;
 			*ascq = ua->ua_ascq;
 			break;
@@ -265,8 +261,8 @@ void core_scsi3_ua_for_check_condition(
 		" INTLCK_CTRL: %d, mapped LUN: %u, got CDB: 0x%02x"
 		" reported ASC: 0x%02x, ASCQ: 0x%02x\n",
 		nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
-		(dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
-		"Releasing", dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl,
+		(dev->dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
+		"Releasing", dev->dev_attrib.emulate_ua_intlck_ctrl,
 		cmd->orig_fe_lun, cmd->t_task_cdb[0], *asc, *ascq);
 }
 

drivers/target/target_core_ua.h

@@ -26,7 +26,7 @@
 
 extern struct kmem_cache *se_ua_cache;
 
-extern int core_scsi3_ua_check(struct se_cmd *, unsigned char *);
+extern sense_reason_t target_scsi3_ua_check(struct se_cmd *);
 extern int core_scsi3_ua_allocate(struct se_node_acl *, u32, u8, u8);
 extern void core_scsi3_ua_release_all(struct se_dev_entry *);
 extern void core_scsi3_ua_for_check_condition(struct se_cmd *, u8 *, u8 *);

drivers/target/tcm_fc/tfc_sess.c

@@ -430,7 +430,6 @@ static void ft_sess_rcu_free(struct rcu_head *rcu)
 {
 	struct ft_sess *sess = container_of(rcu, struct ft_sess, rcu);
 
-	transport_deregister_session(sess->se_sess);
 	kfree(sess);
 }
 
@@ -438,6 +437,7 @@ static void ft_sess_free(struct kref *kref)
 {
 	struct ft_sess *sess = container_of(kref, struct ft_sess, kref);
 
+	transport_deregister_session(sess->se_sess);
 	call_rcu(&sess->rcu, ft_sess_rcu_free);
 }
 

drivers/vhost/tcm_vhost.c

@@ -538,10 +538,6 @@ static void tcm_vhost_submission_work(struct work_struct *work)
 
 	if (tv_cmd->tvc_sgl_count) {
 		sg_ptr = tv_cmd->tvc_sgl;
-		/*
-		 * For BIDI commands, pass in the extra READ buffer
-		 * to transport_generic_map_mem_to_cmd() below..
-		 */
 /* FIXME: Fix BIDI operation in tcm_vhost_submission_work() */
 #if 0
 		if (se_cmd->se_cmd_flags & SCF_BIDI) {

include/target/target_core_backend.h

@@ -9,6 +9,8 @@ struct se_subsystem_api {
 	struct list_head sub_api_list;
 
 	char name[16];
+	char inquiry_prod[16];
+	char inquiry_rev[4];
 	struct module *owner;
 
 	u8 transport_type;
@@ -16,46 +18,45 @@ struct se_subsystem_api {
 	int (*attach_hba)(struct se_hba *, u32);
 	void (*detach_hba)(struct se_hba *);
 	int (*pmode_enable_hba)(struct se_hba *, unsigned long);
-	void *(*allocate_virtdevice)(struct se_hba *, const char *);
-	struct se_device *(*create_virtdevice)(struct se_hba *,
-				struct se_subsystem_dev *, void *);
-	void (*free_device)(void *);
+
+	struct se_device *(*alloc_device)(struct se_hba *, const char *);
+	int (*configure_device)(struct se_device *);
+	void (*free_device)(struct se_device *device);
+
+	ssize_t (*set_configfs_dev_params)(struct se_device *,
+					   const char *, ssize_t);
+	ssize_t (*show_configfs_dev_params)(struct se_device *, char *);
+
 	void (*transport_complete)(struct se_cmd *cmd,
 				   struct scatterlist *,
 				   unsigned char *);
 
-	int (*parse_cdb)(struct se_cmd *cmd);
-	ssize_t (*check_configfs_dev_params)(struct se_hba *,
-			struct se_subsystem_dev *);
-	ssize_t (*set_configfs_dev_params)(struct se_hba *,
-			struct se_subsystem_dev *, const char *, ssize_t);
-	ssize_t (*show_configfs_dev_params)(struct se_hba *,
-			struct se_subsystem_dev *, char *);
-	u32 (*get_device_rev)(struct se_device *);
+	sense_reason_t (*parse_cdb)(struct se_cmd *cmd);
 	u32 (*get_device_type)(struct se_device *);
 	sector_t (*get_blocks)(struct se_device *);
 	unsigned char *(*get_sense_buffer)(struct se_cmd *);
 };
 
-struct spc_ops {
-	int (*execute_rw)(struct se_cmd *cmd);
-	int (*execute_sync_cache)(struct se_cmd *cmd);
-	int (*execute_write_same)(struct se_cmd *cmd);
-	int (*execute_unmap)(struct se_cmd *cmd);
+struct sbc_ops {
+	sense_reason_t (*execute_rw)(struct se_cmd *cmd);
+	sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
+	sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
+	sense_reason_t (*execute_write_same_unmap)(struct se_cmd *cmd);
+	sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
 };
 
 int	transport_subsystem_register(struct se_subsystem_api *);
 void	transport_subsystem_release(struct se_subsystem_api *);
 
-struct se_device *transport_add_device_to_core_hba(struct se_hba *,
-		struct se_subsystem_api *, struct se_subsystem_dev *, u32,
-		void *, struct se_dev_limits *, const char *, const char *);
-
 void	target_complete_cmd(struct se_cmd *, u8);
 
-int	sbc_parse_cdb(struct se_cmd *cmd, struct spc_ops *ops);
-int	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
-int	spc_get_write_same_sectors(struct se_cmd *cmd);
+sense_reason_t	spc_parse_cdb(struct se_cmd *cmd, unsigned int *size);
+sense_reason_t	spc_emulate_report_luns(struct se_cmd *cmd);
+sector_t	spc_get_write_same_sectors(struct se_cmd *cmd);
+
+sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
+u32	sbc_get_device_rev(struct se_device *dev);
+u32	sbc_get_device_type(struct se_device *dev);
 
 void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);

include/target/target_core_base.h

@@ -62,20 +62,6 @@
 
 #define PYX_TRANSPORT_STATUS_INTERVAL		5 /* In seconds */
 
-/*
- * struct se_subsystem_dev->su_dev_flags
-*/
-#define SDF_FIRMWARE_VPD_UNIT_SERIAL		0x00000001
-#define SDF_EMULATED_VPD_UNIT_SERIAL		0x00000002
-#define SDF_USING_UDEV_PATH			0x00000004
-#define SDF_USING_ALIAS				0x00000008
-
-/*
- * struct se_device->dev_flags
- */
-#define DF_SPC2_RESERVATIONS			0x00000001
-#define DF_SPC2_RESERVATIONS_WITH_ISID		0x00000002
-
 /* struct se_dev_attrib sanity values */
 /* Default max_unmap_lba_count */
 #define DA_MAX_UNMAP_LBA_COUNT			0
@@ -85,6 +71,8 @@
 #define DA_UNMAP_GRANULARITY_DEFAULT		0
 /* Default unmap_granularity_alignment */
 #define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT	0
+/* Default max_write_same_len, disabled by default */
+#define DA_MAX_WRITE_SAME_LEN			0
 /* Default max transfer length */
 #define DA_FABRIC_MAX_SECTORS			8192
 /* Emulation for Direct Page Out */
@@ -107,8 +95,6 @@
  */
 #define DA_EMULATE_TPWS				0
 /* No Emulation for PSCSI by default */
-#define DA_EMULATE_RESERVATIONS			0
-/* No Emulation for PSCSI by default */
 #define DA_EMULATE_ALUA				0
 /* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
 #define DA_ENFORCE_PR_ISIDS			1
@@ -160,8 +146,6 @@ enum se_cmd_flags_table {
 	SCF_EMULATED_TASK_SENSE		= 0x00000004,
 	SCF_SCSI_DATA_CDB		= 0x00000008,
 	SCF_SCSI_TMR_CDB		= 0x00000010,
-	SCF_SCSI_CDB_EXCEPTION		= 0x00000020,
-	SCF_SCSI_RESERVATION_CONFLICT	= 0x00000040,
 	SCF_FUA				= 0x00000080,
 	SCF_SE_LUN_CMD			= 0x00000100,
 	SCF_BIDI			= 0x00000400,
@@ -182,38 +166,33 @@ enum transport_lunflags_table {
 	TRANSPORT_LUNFLAGS_READ_WRITE		= 0x04,
 };
 
-/* struct se_device->dev_status */
-enum transport_device_status_table {
-	TRANSPORT_DEVICE_ACTIVATED		= 0x01,
-	TRANSPORT_DEVICE_DEACTIVATED		= 0x02,
-	TRANSPORT_DEVICE_QUEUE_FULL		= 0x04,
-	TRANSPORT_DEVICE_SHUTDOWN		= 0x08,
-	TRANSPORT_DEVICE_OFFLINE_ACTIVATED	= 0x10,
-	TRANSPORT_DEVICE_OFFLINE_DEACTIVATED	= 0x20,
-};
-
 /*
- * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
+ * Used by transport_send_check_condition_and_sense()
  * to signal which ASC/ASCQ sense payload should be built.
  */
+typedef unsigned __bitwise__ sense_reason_t;
+
 enum tcm_sense_reason_table {
-	TCM_NON_EXISTENT_LUN			= 0x01,
-	TCM_UNSUPPORTED_SCSI_OPCODE		= 0x02,
-	TCM_INCORRECT_AMOUNT_OF_DATA		= 0x03,
-	TCM_UNEXPECTED_UNSOLICITED_DATA		= 0x04,
-	TCM_SERVICE_CRC_ERROR			= 0x05,
-	TCM_SNACK_REJECTED			= 0x06,
-	TCM_SECTOR_COUNT_TOO_MANY		= 0x07,
-	TCM_INVALID_CDB_FIELD			= 0x08,
-	TCM_INVALID_PARAMETER_LIST		= 0x09,
-	TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE	= 0x0a,
-	TCM_UNKNOWN_MODE_PAGE			= 0x0b,
-	TCM_WRITE_PROTECTED			= 0x0c,
-	TCM_CHECK_CONDITION_ABORT_CMD		= 0x0d,
-	TCM_CHECK_CONDITION_UNIT_ATTENTION	= 0x0e,
-	TCM_CHECK_CONDITION_NOT_READY		= 0x0f,
-	TCM_RESERVATION_CONFLICT		= 0x10,
-	TCM_ADDRESS_OUT_OF_RANGE		= 0x11,
+#define R(x)	(__force sense_reason_t )(x)
+	TCM_NON_EXISTENT_LUN			= R(0x01),
+	TCM_UNSUPPORTED_SCSI_OPCODE		= R(0x02),
+	TCM_INCORRECT_AMOUNT_OF_DATA		= R(0x03),
+	TCM_UNEXPECTED_UNSOLICITED_DATA		= R(0x04),
+	TCM_SERVICE_CRC_ERROR			= R(0x05),
+	TCM_SNACK_REJECTED			= R(0x06),
+	TCM_SECTOR_COUNT_TOO_MANY		= R(0x07),
+	TCM_INVALID_CDB_FIELD			= R(0x08),
+	TCM_INVALID_PARAMETER_LIST		= R(0x09),
+	TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE	= R(0x0a),
+	TCM_UNKNOWN_MODE_PAGE			= R(0x0b),
+	TCM_WRITE_PROTECTED			= R(0x0c),
+	TCM_CHECK_CONDITION_ABORT_CMD		= R(0x0d),
+	TCM_CHECK_CONDITION_UNIT_ATTENTION	= R(0x0e),
+	TCM_CHECK_CONDITION_NOT_READY		= R(0x0f),
+	TCM_RESERVATION_CONFLICT		= R(0x10),
+	TCM_ADDRESS_OUT_OF_RANGE		= R(0x11),
+	TCM_OUT_OF_RESOURCES			= R(0x12),
+#undef R
 };
 
 enum target_sc_flags_table {
@@ -246,30 +225,6 @@ enum tcm_tmrsp_table {
 	TMR_FUNCTION_REJECTED		= 255,
 };
 
-struct se_obj {
-	atomic_t obj_access_count;
-};
-
-/*
- * Used by TCM Core internally to signal if ALUA emulation is enabled or
- * disabled, or running in with TCM/pSCSI passthrough mode
- */
-typedef enum {
-	SPC_ALUA_PASSTHROUGH,
-	SPC2_ALUA_DISABLED,
-	SPC3_ALUA_EMULATED
-} t10_alua_index_t;
-
-/*
- * Used by TCM Core internally to signal if SAM Task Attribute emulation
- * is enabled or disabled, or running in with TCM/pSCSI passthrough mode
- */
-typedef enum {
-	SAM_TASK_ATTR_PASSTHROUGH,
-	SAM_TASK_ATTR_UNTAGGED,
-	SAM_TASK_ATTR_EMULATED
-} t10_task_attr_index_t;
-
 /*
  * Used for target SCSI statistics
  */
@@ -283,17 +238,15 @@ typedef enum {
 struct se_cmd;
 
 struct t10_alua {
-	t10_alua_index_t alua_type;
 	/* ALUA Target Port Group ID */
 	u16	alua_tg_pt_gps_counter;
 	u32	alua_tg_pt_gps_count;
 	spinlock_t tg_pt_gps_lock;
-	struct se_subsystem_dev *t10_sub_dev;
+	struct se_device *t10_dev;
 	/* Used for default ALUA Target Port Group */
 	struct t10_alua_tg_pt_gp *default_tg_pt_gp;
 	/* Used for default ALUA Target Port Group ConfigFS group */
 	struct config_group alua_tg_pt_gps_group;
-	int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
 	struct list_head tg_pt_gps_list;
 };
 
@@ -335,7 +288,7 @@ struct t10_alua_tg_pt_gp {
 	atomic_t tg_pt_gp_ref_cnt;
 	spinlock_t tg_pt_gp_lock;
 	struct mutex tg_pt_gp_md_mutex;
-	struct se_subsystem_dev *tg_pt_gp_su_dev;
+	struct se_device *tg_pt_gp_dev;
 	struct config_group tg_pt_gp_group;
 	struct list_head tg_pt_gp_list;
 	struct list_head tg_pt_gp_mem_list;
@@ -366,23 +319,11 @@ struct t10_wwn {
 	char revision[4];
 	char unit_serial[INQUIRY_VPD_SERIAL_LEN];
 	spinlock_t t10_vpd_lock;
-	struct se_subsystem_dev *t10_sub_dev;
+	struct se_device *t10_dev;
 	struct config_group t10_wwn_group;
 	struct list_head t10_vpd_list;
 };
 
-
-/*
- * Used by TCM Core internally to signal if >= SPC-3 persistent reservations
- * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
- * mode
- */
-typedef enum {
-	SPC_PASSTHROUGH,
-	SPC2_RESERVATIONS,
-	SPC3_PERSISTENT_RESERVATIONS
-} t10_reservations_index_t;
-
 struct t10_pr_registration {
 	/* Used for fabrics that contain WWN+ISID */
 #define PR_REG_ISID_LEN				16
@@ -424,18 +365,6 @@ struct t10_pr_registration {
 	struct list_head pr_reg_atp_mem_list;
 };
 
-/*
- * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
- * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
- * core_setup_reservations()
- */
-struct t10_reservation_ops {
-	int (*t10_reservation_check)(struct se_cmd *, u32 *);
-	int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
-	int (*t10_pr_register)(struct se_cmd *);
-	int (*t10_pr_clear)(struct se_cmd *);
-};
-
 struct t10_reservation {
 	/* Reservation effects all target ports */
 	int pr_all_tg_pt;
@@ -446,7 +375,6 @@ struct t10_reservation {
 #define PR_APTPL_BUF_LEN			8192
 	u32 pr_aptpl_buf_len;
 	u32 pr_generation;
-	t10_reservations_index_t res_type;
 	spinlock_t registration_lock;
 	spinlock_t aptpl_reg_lock;
 	/*
@@ -462,7 +390,6 @@ struct t10_reservation {
 	struct se_node_acl *pr_res_holder;
 	struct list_head registration_list;
 	struct list_head aptpl_reg_list;
-	struct t10_reservation_ops pr_ops;
 };
 
 struct se_tmr_req {
@@ -485,7 +412,6 @@ struct se_cmd {
 	u8			scsi_status;
 	u8			scsi_asc;
 	u8			scsi_ascq;
-	u8			scsi_sense_reason;
 	u16			scsi_sense_length;
 	/* Delay for ALUA Active/NonOptimized state access in milliseconds */
 	int			alua_nonop_delay;
@@ -523,7 +449,7 @@ struct se_cmd {
 	struct completion	cmd_wait_comp;
 	struct kref		cmd_kref;
 	struct target_core_fabric_ops *se_tfo;
-	int (*execute_cmd)(struct se_cmd *);
+	sense_reason_t		(*execute_cmd)(struct se_cmd *);
 	void (*transport_complete_callback)(struct se_cmd *);
 
 	unsigned char		*t_task_cdb;
@@ -581,6 +507,8 @@ struct se_node_acl {
 	bool			acl_stop:1;
 	u32			queue_depth;
 	u32			acl_index;
+#define MAX_ACL_TAG_SIZE 64
+	char			acl_tag[MAX_ACL_TAG_SIZE];
 	u64			num_cmds;
 	u64			read_bytes;
 	u64			write_bytes;
@@ -662,15 +590,6 @@ struct se_dev_entry {
 	struct list_head	ua_list;
 };
 
-struct se_dev_limits {
-	/* Max supported HW queue depth */
-	u32		hw_queue_depth;
-	/* Max supported virtual queue depth */
-	u32		queue_depth;
-	/* From include/linux/blkdev.h for the other HW/SW limits. */
-	struct queue_limits limits;
-};
-
 struct se_dev_attrib {
 	int		emulate_dpo;
 	int		emulate_fua_write;
@@ -680,8 +599,6 @@ struct se_dev_attrib {
 	int		emulate_tas;
 	int		emulate_tpu;
 	int		emulate_tpws;
-	int		emulate_reservations;
-	int		emulate_alua;
 	int		enforce_pr_isids;
 	int		is_nonrot;
 	int		emulate_rest_reord;
@@ -696,7 +613,8 @@ struct se_dev_attrib {
 	u32		max_unmap_block_desc_count;
 	u32		unmap_granularity;
 	u32		unmap_granularity_alignment;
-	struct se_subsystem_dev *da_sub_dev;
+	u32		max_write_same_len;
+	struct se_device *da_dev;
 	struct config_group da_group;
 };
 
@@ -707,48 +625,25 @@ struct se_dev_stat_grps {
 	struct config_group scsi_lu_group;
 };
 
-struct se_subsystem_dev {
-/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
-#define SE_DEV_ALIAS_LEN		512
-	unsigned char	se_dev_alias[SE_DEV_ALIAS_LEN];
-/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
-#define SE_UDEV_PATH_LEN		512
-	unsigned char	se_dev_udev_path[SE_UDEV_PATH_LEN];
-	u32		su_dev_flags;
-	struct se_hba *se_dev_hba;
-	struct se_device *se_dev_ptr;
-	struct se_dev_attrib se_dev_attrib;
-	/* T10 Asymmetric Logical Unit Assignment for Target Ports */
-	struct t10_alua	t10_alua;
-	/* T10 Inquiry and VPD WWN Information */
-	struct t10_wwn	t10_wwn;
-	/* T10 SPC-2 + SPC-3 Reservations */
-	struct t10_reservation t10_pr;
-	spinlock_t      se_dev_lock;
-	void            *se_dev_su_ptr;
-	struct config_group se_dev_group;
-	/* For T10 Reservations */
-	struct config_group se_dev_pr_group;
-	/* For target_core_stat.c groups */
-	struct se_dev_stat_grps dev_stat_grps;
-};
-
 struct se_device {
+#define SE_DEV_LINK_MAGIC			0xfeeddeef
+	u32			dev_link_magic;
 	/* RELATIVE TARGET PORT IDENTIFER Counter */
 	u16			dev_rpti_counter;
 	/* Used for SAM Task Attribute ordering */
 	u32			dev_cur_ordered_id;
 	u32			dev_flags;
+#define DF_CONFIGURED				0x00000001
+#define DF_FIRMWARE_VPD_UNIT_SERIAL		0x00000002
+#define DF_EMULATED_VPD_UNIT_SERIAL		0x00000004
+#define DF_USING_UDEV_PATH			0x00000008
+#define DF_USING_ALIAS				0x00000010
 	u32			dev_port_count;
-	/* See transport_device_status_table */
-	u32			dev_status;
 	/* Physical device queue depth */
 	u32			queue_depth;
 	/* Used for SPC-2 reservations enforce of ISIDs */
 	u64			dev_res_bin_isid;
-	t10_task_attr_index_t	dev_task_attr_type;
 	/* Pointer to transport specific device structure */
-	void 			*dev_ptr;
 	u32			dev_index;
 	u64			creation_time;
 	u32			num_resets;
@@ -761,13 +656,13 @@ struct se_device {
 	atomic_t		dev_ordered_id;
 	atomic_t		dev_ordered_sync;
 	atomic_t		dev_qf_count;
-	struct se_obj		dev_obj;
-	struct se_obj		dev_access_obj;
-	struct se_obj		dev_export_obj;
+	int			export_count;
 	spinlock_t		delayed_cmd_lock;
 	spinlock_t		execute_task_lock;
 	spinlock_t		dev_reservation_lock;
-	spinlock_t		dev_status_lock;
+	unsigned int		dev_reservation_flags;
+#define DRF_SPC2_RESERVATIONS			0x00000001
+#define DRF_SPC2_RESERVATIONS_WITH_ISID		0x00000002
 	spinlock_t		se_port_lock;
 	spinlock_t		se_tmr_lock;
 	spinlock_t		qf_cmd_lock;
@@ -786,7 +681,20 @@ struct se_device {
 	struct list_head	qf_cmd_list;
 	/* Pointer to associated SE HBA */
 	struct se_hba		*se_hba;
-	struct se_subsystem_dev *se_sub_dev;
+	/* T10 Inquiry and VPD WWN Information */
+	struct t10_wwn		t10_wwn;
+	/* T10 Asymmetric Logical Unit Assignment for Target Ports */
+	struct t10_alua		t10_alua;
+	/* T10 SPC-2 + SPC-3 Reservations */
+	struct t10_reservation	t10_pr;
+	struct se_dev_attrib	dev_attrib;
+	struct config_group	dev_group;
+	struct config_group	dev_pr_group;
+	struct se_dev_stat_grps dev_stat_grps;
+#define SE_DEV_ALIAS_LEN 512		/* must be less than PAGE_SIZE */
+	unsigned char		dev_alias[SE_DEV_ALIAS_LEN];
+#define SE_UDEV_PATH_LEN 512		/* must be less than PAGE_SIZE */
+	unsigned char		udev_path[SE_UDEV_PATH_LEN];
 	/* Pointer to template of function pointers for transport */
 	struct se_subsystem_api *transport;
 	/* Linked list for struct se_hba struct se_device list */
@@ -803,8 +711,6 @@ struct se_hba {
 	u32			hba_index;
 	/* Pointer to transport specific host structure. */
 	void			*hba_ptr;
-	/* Linked list for struct se_device */
-	struct list_head	hba_dev_list;
 	struct list_head	hba_node;
 	spinlock_t		device_lock;
 	struct config_group	hba_group;
@@ -820,6 +726,8 @@ struct se_port_stat_grps {
 };
 
 struct se_lun {
+#define SE_LUN_LINK_MAGIC			0xffff7771
+	u32			lun_link_magic;
 	/* See transport_lun_status_table */
 	enum transport_lun_status_table lun_status;
 	u32			lun_access;

include/target/target_core_fabric.h

@@ -98,8 +98,8 @@ void	transport_deregister_session(struct se_session *);
 
 void	transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
 		struct se_session *, u32, int, int, unsigned char *);
-int	transport_lookup_cmd_lun(struct se_cmd *, u32);
-int	target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
+sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
+sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
 int	target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
 		unsigned char *, unsigned char *, u32, u32, int, int, int,
 		struct scatterlist *, u32, struct scatterlist *, u32);
@@ -110,9 +110,7 @@ int	target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
 		void *fabric_tmr_ptr, unsigned char tm_type,
 		gfp_t, unsigned int, int);
 int	transport_handle_cdb_direct(struct se_cmd *);
-int	transport_generic_map_mem_to_cmd(struct se_cmd *cmd,
-		struct scatterlist *, u32, struct scatterlist *, u32);
-int	transport_generic_new_cmd(struct se_cmd *);
+sense_reason_t	transport_generic_new_cmd(struct se_cmd *);
 
 void	target_execute_cmd(struct se_cmd *cmd);
 
@@ -120,7 +118,8 @@ void	transport_generic_free_cmd(struct se_cmd *, int);
 
 bool	transport_wait_for_tasks(struct se_cmd *);
 int	transport_check_aborted_status(struct se_cmd *, int);
-int	transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
+int	transport_send_check_condition_and_sense(struct se_cmd *,
+		sense_reason_t, int);
 
 int	target_put_sess_cmd(struct se_session *, struct se_cmd *);
 void	target_sess_cmd_list_set_waiting(struct se_session *);
@@ -131,7 +130,7 @@ int	core_alua_check_nonop_delay(struct se_cmd *);
 int	core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
 void	core_tmr_release_req(struct se_tmr_req *);
 int	transport_generic_handle_tmr(struct se_cmd *);
-void	transport_generic_request_failure(struct se_cmd *);
+void	transport_generic_request_failure(struct se_cmd *, sense_reason_t);
 int	transport_lookup_tmr_lun(struct se_cmd *, u32);
 
 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
@@ -143,6 +142,8 @@ int	core_tpg_del_initiator_node_acl(struct se_portal_group *,
 		struct se_node_acl *, int);
 int	core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
 		unsigned char *, u32, int);
+int	core_tpg_set_initiator_node_tag(struct se_portal_group *,
+		struct se_node_acl *, const char *);
 int	core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *,
 		struct se_portal_group *, void *, int);
 int	core_tpg_deregister(struct se_portal_group *);