Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "The bulk of the series are bugfixes for qla2xxx target NPIV support
  that went in for v3.14-rc1.  Also included are a few DIF related
  fixes, a qla2xxx fix (Cc'ed to stable) from Greg W., and vhost/scsi
  protocol version related fix from Venkatesh.

  Also just a heads up that a series to address a number of issues with
  iser-target active I/O reset/shutdown is still being tested, and will
  be included in a separate -rc6 PULL request"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  vhost/scsi: Check LUN structure byte 0 is set to 1, per spec
  qla2xxx: Fix kernel panic on selective retransmission request
  Target/sbc: Don't use sg as iterator in sbc_verify_read
  target: Add DIF sense codes in transport_generic_request_failure
  target/sbc: Fix sbc_dif_copy_prot addr offset bug
  tcm_qla2xxx: Fix NAA formatted name for NPIV WWPNs
  tcm_qla2xxx: Perform configfs depend/undepend for base_tpg
  tcm_qla2xxx: Add NPIV specific enable/disable attribute logic
  qla2xxx: Check + fail when npiv_vports_inuse exists in shutdown
  qla2xxx: Fix qlt_lport_register base_vha callback race

drivers/scsi/qla2xxx/qla_target.c

@@ -790,17 +790,32 @@ static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 }
 
 /* Called by tcm_qla2xxx configfs code */
-void qlt_stop_phase1(struct qla_tgt *tgt)
+int qlt_stop_phase1(struct qla_tgt *tgt)
 {
 	struct scsi_qla_host *vha = tgt->vha;
 	struct qla_hw_data *ha = tgt->ha;
 	unsigned long flags;
 
+	mutex_lock(&qla_tgt_mutex);
+	if (!vha->fc_vport) {
+		struct Scsi_Host *sh = vha->host;
+		struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
+		bool npiv_vports;
+
+		spin_lock_irqsave(sh->host_lock, flags);
+		npiv_vports = (fc_host->npiv_vports_inuse);
+		spin_unlock_irqrestore(sh->host_lock, flags);
+
+		if (npiv_vports) {
+			mutex_unlock(&qla_tgt_mutex);
+			return -EPERM;
+		}
+	}
 	if (tgt->tgt_stop || tgt->tgt_stopped) {
 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 		    "Already in tgt->tgt_stop or tgt_stopped state\n");
-		dump_stack();
-		return;
+		mutex_unlock(&qla_tgt_mutex);
+		return -EPERM;
 	}
 
 	ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
@@ -815,6 +830,7 @@ void qlt_stop_phase1(struct qla_tgt *tgt)
 	qlt_clear_tgt_db(tgt, true);
 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 	mutex_unlock(&vha->vha_tgt.tgt_mutex);
+	mutex_unlock(&qla_tgt_mutex);
 
 	flush_delayed_work(&tgt->sess_del_work);
 
@@ -841,6 +857,7 @@ void qlt_stop_phase1(struct qla_tgt *tgt)
 
 	/* Wait for sessions to clear out (just in case) */
 	wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
+	return 0;
 }
 EXPORT_SYMBOL(qlt_stop_phase1);
 
@@ -3185,7 +3202,8 @@ restart:
 		ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
 		    "SRR cmd %p (se_cmd %p, tag %d, op %x), "
 		    "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
-		    se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
+		    se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
+		    cmd->sg_cnt, cmd->offset);
 
 		qlt_handle_srr(vha, sctio, imm);
 
@@ -4181,6 +4199,9 @@ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
 	tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
 	tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
 
+	if (base_vha->fc_vport)
+		return 0;
+
 	mutex_lock(&qla_tgt_mutex);
 	list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
 	mutex_unlock(&qla_tgt_mutex);
@@ -4194,6 +4215,10 @@ int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
 	if (!vha->vha_tgt.qla_tgt)
 		return 0;
 
+	if (vha->fc_vport) {
+		qlt_release(vha->vha_tgt.qla_tgt);
+		return 0;
+	}
 	mutex_lock(&qla_tgt_mutex);
 	list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
 	mutex_unlock(&qla_tgt_mutex);
@@ -4265,6 +4290,12 @@ int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
 			continue;
 		}
+		if (tgt->tgt_stop) {
+			pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
+				 host->host_no);
+			spin_unlock_irqrestore(&ha->hardware_lock, flags);
+			continue;
+		}
 		spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
 		if (!scsi_host_get(host)) {
@@ -4279,12 +4310,11 @@ int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
 			scsi_host_put(host);
 			continue;
 		}
-		mutex_unlock(&qla_tgt_mutex);
-
 		rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
 		if (rc != 0)
 			scsi_host_put(host);
 
+		mutex_unlock(&qla_tgt_mutex);
 		return rc;
 	}
 	mutex_unlock(&qla_tgt_mutex);

drivers/scsi/qla2xxx/qla_target.h

@@ -1001,7 +1001,7 @@ extern void qlt_modify_vp_config(struct scsi_qla_host *,
 extern void qlt_probe_one_stage1(struct scsi_qla_host *, struct qla_hw_data *);
 extern int qlt_mem_alloc(struct qla_hw_data *);
 extern void qlt_mem_free(struct qla_hw_data *);
-extern void qlt_stop_phase1(struct qla_tgt *);
+extern int qlt_stop_phase1(struct qla_tgt *);
 extern void qlt_stop_phase2(struct qla_tgt *);
 extern irqreturn_t qla83xx_msix_atio_q(int, void *);
 extern void qlt_83xx_iospace_config(struct qla_hw_data *);

drivers/scsi/qla2xxx/tcm_qla2xxx.c

@@ -182,20 +182,6 @@ static int tcm_qla2xxx_npiv_parse_wwn(
 	return 0;
 }
 
-static ssize_t tcm_qla2xxx_npiv_format_wwn(char *buf, size_t len,
-					u64 wwpn, u64 wwnn)
-{
-	u8 b[8], b2[8];
-
-	put_unaligned_be64(wwpn, b);
-	put_unaligned_be64(wwnn, b2);
-	return snprintf(buf, len,
-		"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x,"
-		"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
-		b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
-		b2[0], b2[1], b2[2], b2[3], b2[4], b2[5], b2[6], b2[7]);
-}
-
 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 {
 	return "qla2xxx_npiv";
@@ -227,15 +213,6 @@ static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 	return lport->lport_naa_name;
 }
 
-static char *tcm_qla2xxx_npiv_get_fabric_wwn(struct se_portal_group *se_tpg)
-{
-	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
-				struct tcm_qla2xxx_tpg, se_tpg);
-	struct tcm_qla2xxx_lport *lport = tpg->lport;
-
-	return &lport->lport_npiv_name[0];
-}
-
 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 {
 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
@@ -941,15 +918,41 @@ static ssize_t tcm_qla2xxx_tpg_show_enable(
 			atomic_read(&tpg->lport_tpg_enabled));
 }
 
+static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
+{
+	struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
+				struct tcm_qla2xxx_tpg, tpg_base_work);
+	struct se_portal_group *se_tpg = &base_tpg->se_tpg;
+	struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
+
+	if (!configfs_depend_item(se_tpg->se_tpg_tfo->tf_subsys,
+				  &se_tpg->tpg_group.cg_item)) {
+		atomic_set(&base_tpg->lport_tpg_enabled, 1);
+		qlt_enable_vha(base_vha);
+	}
+	complete(&base_tpg->tpg_base_comp);
+}
+
+static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
+{
+	struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
+				struct tcm_qla2xxx_tpg, tpg_base_work);
+	struct se_portal_group *se_tpg = &base_tpg->se_tpg;
+	struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
+
+	if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
+		atomic_set(&base_tpg->lport_tpg_enabled, 0);
+		configfs_undepend_item(se_tpg->se_tpg_tfo->tf_subsys,
+				       &se_tpg->tpg_group.cg_item);
+	}
+	complete(&base_tpg->tpg_base_comp);
+}
+
 static ssize_t tcm_qla2xxx_tpg_store_enable(
 	struct se_portal_group *se_tpg,
 	const char *page,
 	size_t count)
 {
-	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
-	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
-			struct tcm_qla2xxx_lport, lport_wwn);
-	struct scsi_qla_host *vha = lport->qla_vha;
 	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 			struct tcm_qla2xxx_tpg, se_tpg);
 	unsigned long op;
@@ -964,19 +967,28 @@ static ssize_t tcm_qla2xxx_tpg_store_enable(
 		pr_err("Illegal value for tpg_enable: %lu\n", op);
 		return -EINVAL;
 	}
-
 	if (op) {
-		atomic_set(&tpg->lport_tpg_enabled, 1);
-		qlt_enable_vha(vha);
+		if (atomic_read(&tpg->lport_tpg_enabled))
+			return -EEXIST;
+
+		INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 	} else {
-		if (!vha->vha_tgt.qla_tgt) {
-			pr_err("struct qla_hw_data *vha->vha_tgt.qla_tgt is NULL\n");
-			return -ENODEV;
-		}
-		atomic_set(&tpg->lport_tpg_enabled, 0);
-		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
+		if (!atomic_read(&tpg->lport_tpg_enabled))
+			return count;
+
+		INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 	}
+	init_completion(&tpg->tpg_base_comp);
+	schedule_work(&tpg->tpg_base_work);
+	wait_for_completion(&tpg->tpg_base_comp);
 
+	if (op) {
+		if (!atomic_read(&tpg->lport_tpg_enabled))
+			return -ENODEV;
+	} else {
+		if (atomic_read(&tpg->lport_tpg_enabled))
+			return -EPERM;
+	}
 	return count;
 }
 
@@ -1053,11 +1065,64 @@ static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
 	/*
 	 * Clear local TPG=1 pointer for non NPIV mode.
 	 */
-		lport->tpg_1 = NULL;
-
+	lport->tpg_1 = NULL;
 	kfree(tpg);
 }
 
+static ssize_t tcm_qla2xxx_npiv_tpg_show_enable(
+	struct se_portal_group *se_tpg,
+	char *page)
+{
+	return tcm_qla2xxx_tpg_show_enable(se_tpg, page);
+}
+
+static ssize_t tcm_qla2xxx_npiv_tpg_store_enable(
+	struct se_portal_group *se_tpg,
+	const char *page,
+	size_t count)
+{
+	struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
+	struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
+			struct tcm_qla2xxx_lport, lport_wwn);
+	struct scsi_qla_host *vha = lport->qla_vha;
+	struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
+			struct tcm_qla2xxx_tpg, se_tpg);
+	unsigned long op;
+	int rc;
+
+	rc = kstrtoul(page, 0, &op);
+	if (rc < 0) {
+		pr_err("kstrtoul() returned %d\n", rc);
+		return -EINVAL;
+	}
+	if ((op != 1) && (op != 0)) {
+		pr_err("Illegal value for tpg_enable: %lu\n", op);
+		return -EINVAL;
+	}
+	if (op) {
+		if (atomic_read(&tpg->lport_tpg_enabled))
+			return -EEXIST;
+
+		atomic_set(&tpg->lport_tpg_enabled, 1);
+		qlt_enable_vha(vha);
+	} else {
+		if (!atomic_read(&tpg->lport_tpg_enabled))
+			return count;
+
+		atomic_set(&tpg->lport_tpg_enabled, 0);
+		qlt_stop_phase1(vha->vha_tgt.qla_tgt);
+	}
+
+	return count;
+}
+
+TF_TPG_BASE_ATTR(tcm_qla2xxx_npiv, enable, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
+        &tcm_qla2xxx_npiv_tpg_enable.attr,
+        NULL,
+};
+
 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
 	struct se_wwn *wwn,
 	struct config_group *group,
@@ -1650,6 +1715,9 @@ static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
 	struct scsi_qla_host *npiv_vha;
 	struct tcm_qla2xxx_lport *lport =
 			(struct tcm_qla2xxx_lport *)target_lport_ptr;
+	struct tcm_qla2xxx_lport *base_lport =
+			(struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
+	struct tcm_qla2xxx_tpg *base_tpg;
 	struct fc_vport_identifiers vport_id;
 
 	if (!qla_tgt_mode_enabled(base_vha)) {
@@ -1657,6 +1725,13 @@ static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
 		return -EPERM;
 	}
 
+	if (!base_lport || !base_lport->tpg_1 ||
+	    !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
+		pr_err("qla2xxx base_lport or tpg_1 not available\n");
+		return -EPERM;
+	}
+	base_tpg = base_lport->tpg_1;
+
 	memset(&vport_id, 0, sizeof(vport_id));
 	vport_id.port_name = npiv_wwpn;
 	vport_id.node_name = npiv_wwnn;
@@ -1675,7 +1750,6 @@ static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
 	npiv_vha = (struct scsi_qla_host *)vport->dd_data;
 	npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
 	lport->qla_vha = npiv_vha;
-
 	scsi_host_get(npiv_vha->host);
 	return 0;
 }
@@ -1714,8 +1788,6 @@ static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
 	}
 	lport->lport_npiv_wwpn = npiv_wwpn;
 	lport->lport_npiv_wwnn = npiv_wwnn;
-	tcm_qla2xxx_npiv_format_wwn(&lport->lport_npiv_name[0],
-			TCM_QLA2XXX_NAMELEN, npiv_wwpn, npiv_wwnn);
 	sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
 
 	ret = tcm_qla2xxx_init_lport(lport);
@@ -1824,7 +1896,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_ops = {
 static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
 	.get_fabric_name		= tcm_qla2xxx_npiv_get_fabric_name,
 	.get_fabric_proto_ident		= tcm_qla2xxx_get_fabric_proto_ident,
-	.tpg_get_wwn			= tcm_qla2xxx_npiv_get_fabric_wwn,
+	.tpg_get_wwn			= tcm_qla2xxx_get_fabric_wwn,
 	.tpg_get_tag			= tcm_qla2xxx_get_tag,
 	.tpg_get_default_depth		= tcm_qla2xxx_get_default_depth,
 	.tpg_get_pr_transport_id	= tcm_qla2xxx_get_pr_transport_id,
@@ -1935,7 +2007,7 @@ static int tcm_qla2xxx_register_configfs(void)
 	 */
 	npiv_fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
 	npiv_fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs =
-	    tcm_qla2xxx_tpg_attrs;
+	    tcm_qla2xxx_npiv_tpg_attrs;
 	npiv_fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
 	npiv_fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
 	npiv_fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;

drivers/scsi/qla2xxx/tcm_qla2xxx.h

@@ -4,8 +4,6 @@
 #define TCM_QLA2XXX_VERSION	"v0.1"
 /* length of ASCII WWPNs including pad */
 #define TCM_QLA2XXX_NAMELEN	32
-/* lenth of ASCII NPIV 'WWPN+WWNN' including pad */
-#define TCM_QLA2XXX_NPIV_NAMELEN 66
 
 #include "qla_target.h"
 
@@ -43,6 +41,9 @@ struct tcm_qla2xxx_tpg {
 	struct tcm_qla2xxx_tpg_attrib tpg_attrib;
 	/* Returned by tcm_qla2xxx_make_tpg() */
 	struct se_portal_group se_tpg;
+	/* Items for dealing with configfs_depend_item */
+	struct completion tpg_base_comp;
+	struct work_struct tpg_base_work;
 };
 
 struct tcm_qla2xxx_fc_loopid {
@@ -62,8 +63,6 @@ struct tcm_qla2xxx_lport {
 	char lport_name[TCM_QLA2XXX_NAMELEN];
 	/* ASCII formatted naa WWPN for VPD page 83 etc */
 	char lport_naa_name[TCM_QLA2XXX_NAMELEN];
-	/* ASCII formatted WWPN+WWNN for NPIV FC Target Lport */
-	char lport_npiv_name[TCM_QLA2XXX_NPIV_NAMELEN];
 	/* map for fc_port pointers in 24-bit FC Port ID space */
 	struct btree_head32 lport_fcport_map;
 	/* vmalloc-ed memory for fc_port pointers for 16-bit FC loop ID */

drivers/target/target_core_sbc.c

@@ -1074,7 +1074,7 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read,
 	struct scatterlist *psg;
 	void *paddr, *addr;
 	unsigned int i, len, left;
-	unsigned int offset = 0;
+	unsigned int offset = sg_off;
 
 	left = sectors * dev->prot_length;
 
@@ -1084,11 +1084,10 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read,
 		if (offset >= sg->length) {
 			sg = sg_next(sg);
 			offset = 0;
-			sg_off = sg->offset;
 		}
 
 		paddr = kmap_atomic(sg_page(psg)) + psg->offset;
-		addr = kmap_atomic(sg_page(sg)) + sg_off;
+		addr = kmap_atomic(sg_page(sg)) + sg->offset + offset;
 
 		if (read)
 			memcpy(paddr, addr, len);
@@ -1163,7 +1162,7 @@ sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,
 {
 	struct se_device *dev = cmd->se_dev;
 	struct se_dif_v1_tuple *sdt;
-	struct scatterlist *dsg;
+	struct scatterlist *dsg, *psg = sg;
 	sector_t sector = start;
 	void *daddr, *paddr;
 	int i, j, offset = sg_off;
@@ -1171,14 +1170,14 @@ sbc_dif_verify_read(struct se_cmd *cmd, sector_t start, unsigned int sectors,
 
 	for_each_sg(cmd->t_data_sg, dsg, cmd->t_data_nents, i) {
 		daddr = kmap_atomic(sg_page(dsg)) + dsg->offset;
-		paddr = kmap_atomic(sg_page(sg)) + sg->offset;
+		paddr = kmap_atomic(sg_page(psg)) + sg->offset;
 
 		for (j = 0; j < dsg->length; j += dev->dev_attrib.block_size) {
 
-			if (offset >= sg->length) {
+			if (offset >= psg->length) {
 				kunmap_atomic(paddr);
-				sg = sg_next(sg);
-				paddr = kmap_atomic(sg_page(sg)) + sg->offset;
+				psg = sg_next(psg);
+				paddr = kmap_atomic(sg_page(psg)) + psg->offset;
 				offset = 0;
 			}
 

drivers/target/target_core_transport.c

@@ -1601,6 +1601,9 @@ void transport_generic_request_failure(struct se_cmd *cmd,
 	case TCM_CHECK_CONDITION_ABORT_CMD:
 	case TCM_CHECK_CONDITION_UNIT_ATTENTION:
 	case TCM_CHECK_CONDITION_NOT_READY:
+	case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED:
+	case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED:
+	case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED:
 		break;
 	case TCM_OUT_OF_RESOURCES:
 		sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;

drivers/vhost/scsi.c

@@ -1001,6 +1001,12 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
 			break;
 		}
 
+		/* virtio-scsi spec requires byte 0 of the lun to be 1 */
+		if (unlikely(v_req.lun[0] != 1)) {
+			vhost_scsi_send_bad_target(vs, vq, head, out);
+			continue;
+		}
+
 		/* Extract the tpgt */
 		target = v_req.lun[1];
 		tpg = ACCESS_ONCE(vs_tpg[target]);