Merge tag 'rxrpc-rewrite-20160830-1' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc: Preparation for removal of use of skbs from AFS

Here's a set of patches that prepare the way for the removal of the use of
sk_buffs from fs/afs (they'll be entirely retained within net/rxrpc):

 (1) Fix a potential NULL-pointer deref in rxrpc_abort_calls().

 (2) Condense all the terminal call state machine states to a single one
     plus supplementary info.

 (3) Add a trace point for rxrpc call usage debugging.

 (4) Cleanups and missing headers.

 (5) Provide a way for AFS to ask about a call's peer address without
     having an sk_buff to query.

 (6) Use call->peer directly rather than going via call->conn (which might
     be NULL).

 (7) Pass struct socket * to various rxrpc kernel interface functions so
     they can use that directly rather than getting it from the rxrpc_call
     struct.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/rxrpc.txt

@@ -725,7 +725,8 @@ The kernel interface functions are as follows:
 
  (*) End a client call.
 
-	void rxrpc_kernel_end_call(struct rxrpc_call *call);
+	void rxrpc_kernel_end_call(struct socket *sock,
+				   struct rxrpc_call *call);
 
      This is used to end a previously begun call.  The user_call_ID is expunged
      from AF_RXRPC's knowledge and will not be seen again in association with
@@ -733,7 +734,9 @@ The kernel interface functions are as follows:
 
  (*) Send data through a call.
 
-	int rxrpc_kernel_send_data(struct rxrpc_call *call, struct msghdr *msg,
+	int rxrpc_kernel_send_data(struct socket *sock,
+				   struct rxrpc_call *call,
+				   struct msghdr *msg,
 				   size_t len);
 
      This is used to supply either the request part of a client call or the
@@ -747,7 +750,9 @@ The kernel interface functions are as follows:
 
  (*) Abort a call.
 
-	void rxrpc_kernel_abort_call(struct rxrpc_call *call, u32 abort_code);
+	void rxrpc_kernel_abort_call(struct socket *sock,
+				     struct rxrpc_call *call,
+				     u32 abort_code);
 
      This is used to abort a call if it's still in an abortable state.  The
      abort code specified will be placed in the ABORT message sent.
@@ -868,6 +873,13 @@ The kernel interface functions are as follows:
      This is used to allocate a null RxRPC key that can be used to indicate
      anonymous security for a particular domain.
 
+ (*) Get the peer address of a call.
+
+	void rxrpc_kernel_get_peer(struct socket *sock, struct rxrpc_call *call,
+				   struct sockaddr_rxrpc *_srx);
+
+     This is used to find the remote peer address of a call.
+
 
 =======================
 CONFIGURABLE PARAMETERS

fs/afs/cmservice.c

@@ -17,10 +17,6 @@
 #include "internal.h"
 #include "afs_cm.h"
 
-#if 0
-struct workqueue_struct *afs_cm_workqueue;
-#endif  /*  0  */
-
 static int afs_deliver_cb_init_call_back_state(struct afs_call *,
 					       struct sk_buff *, bool);
 static int afs_deliver_cb_init_call_back_state3(struct afs_call *,
@@ -171,9 +167,9 @@ static void SRXAFSCB_CallBack(struct work_struct *work)
 static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
 				   bool last)
 {
+	struct sockaddr_rxrpc srx;
 	struct afs_callback *cb;
 	struct afs_server *server;
-	struct in_addr addr;
 	__be32 *bp;
 	u32 tmp;
 	int ret, loop;
@@ -182,6 +178,7 @@ static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
 
 	switch (call->unmarshall) {
 	case 0:
+		rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx);
 		call->offset = 0;
 		call->unmarshall++;
 
@@ -282,13 +279,11 @@ static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
 		break;
 	}
 
-
 	call->state = AFS_CALL_REPLYING;
 
 	/* we'll need the file server record as that tells us which set of
 	 * vnodes to operate upon */
-	memcpy(&addr, &ip_hdr(skb)->saddr, 4);
-	server = afs_find_server(&addr);
+	server = afs_find_server(&srx);
 	if (!server)
 		return -ENOTCONN;
 	call->server = server;
@@ -319,12 +314,14 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
 					       struct sk_buff *skb,
 					       bool last)
 {
+	struct sockaddr_rxrpc srx;
 	struct afs_server *server;
-	struct in_addr addr;
 	int ret;
 
 	_enter(",{%u},%d", skb->len, last);
 
+	rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx);
+
 	ret = afs_data_complete(call, skb, last);
 	if (ret < 0)
 		return ret;
@@ -334,8 +331,7 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
 
 	/* we'll need the file server record as that tells us which set of
 	 * vnodes to operate upon */
-	memcpy(&addr, &ip_hdr(skb)->saddr, 4);
-	server = afs_find_server(&addr);
+	server = afs_find_server(&srx);
 	if (!server)
 		return -ENOTCONN;
 	call->server = server;
@@ -352,11 +348,13 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
 						struct sk_buff *skb,
 						bool last)
 {
+	struct sockaddr_rxrpc srx;
 	struct afs_server *server;
-	struct in_addr addr;
 
 	_enter(",{%u},%d", skb->len, last);
 
+	rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx);
+
 	/* There are some arguments that we ignore */
 	afs_data_consumed(call, skb);
 	if (!last)
@@ -367,8 +365,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
 
 	/* we'll need the file server record as that tells us which set of
 	 * vnodes to operate upon */
-	memcpy(&addr, &ip_hdr(skb)->saddr, 4);
-	server = afs_find_server(&addr);
+	server = afs_find_server(&srx);
 	if (!server)
 		return -ENOTCONN;
 	call->server = server;
@@ -426,7 +423,6 @@ static void SRXAFSCB_ProbeUuid(struct work_struct *work)
 
 	_enter("");
 
-
 	if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0)
 		reply.match = htonl(0);
 	else

fs/afs/internal.h

@@ -20,6 +20,7 @@
 #include <linux/sched.h>
 #include <linux/fscache.h>
 #include <linux/backing-dev.h>
+#include <net/af_rxrpc.h>
 
 #include "afs.h"
 #include "afs_vl.h"
@@ -607,6 +608,8 @@ extern void afs_proc_cell_remove(struct afs_cell *);
 /*
  * rxrpc.c
  */
+extern struct socket *afs_socket;
+
 extern int afs_open_socket(void);
 extern void afs_close_socket(void);
 extern void afs_data_consumed(struct afs_call *, struct sk_buff *);
@@ -654,7 +657,7 @@ do {								\
 
 extern struct afs_server *afs_lookup_server(struct afs_cell *,
 					    const struct in_addr *);
-extern struct afs_server *afs_find_server(const struct in_addr *);
+extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *);
 extern void afs_put_server(struct afs_server *);
 extern void __exit afs_purge_servers(void);
 

fs/afs/main.c

@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/completion.h>
 #include <linux/sched.h>
+#include <linux/random.h>
 #include "internal.h"
 
 MODULE_DESCRIPTION("AFS Client File System");

fs/afs/rxrpc.c

@@ -16,7 +16,7 @@
 #include "internal.h"
 #include "afs_cm.h"
 
-static struct socket *afs_socket; /* my RxRPC socket */
+struct socket *afs_socket; /* my RxRPC socket */
 static struct workqueue_struct *afs_async_calls;
 static atomic_t afs_outstanding_calls;
 static atomic_t afs_outstanding_skbs;
@@ -207,7 +207,7 @@ static void afs_free_call(struct afs_call *call)
 static void afs_end_call_nofree(struct afs_call *call)
 {
 	if (call->rxcall) {
-		rxrpc_kernel_end_call(call->rxcall);
+		rxrpc_kernel_end_call(afs_socket, call->rxcall);
 		call->rxcall = NULL;
 	}
 	if (call->type->destructor)
@@ -325,8 +325,8 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg,
 			 * returns from sending the request */
 			if (first + loop >= last)
 				call->state = AFS_CALL_AWAIT_REPLY;
-			ret = rxrpc_kernel_send_data(call->rxcall, msg,
-						     to - offset);
+			ret = rxrpc_kernel_send_data(afs_socket, call->rxcall,
+						     msg, to - offset);
 			kunmap(pages[loop]);
 			if (ret < 0)
 				break;
@@ -406,7 +406,8 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
 	 * request */
 	if (!call->send_pages)
 		call->state = AFS_CALL_AWAIT_REPLY;
-	ret = rxrpc_kernel_send_data(rxcall, &msg, call->request_size);
+	ret = rxrpc_kernel_send_data(afs_socket, rxcall,
+				     &msg, call->request_size);
 	if (ret < 0)
 		goto error_do_abort;
 
@@ -421,7 +422,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
 	return wait_mode->wait(call);
 
 error_do_abort:
-	rxrpc_kernel_abort_call(rxcall, RX_USER_ABORT);
+	rxrpc_kernel_abort_call(afs_socket, rxcall, RX_USER_ABORT);
 	while ((skb = skb_dequeue(&call->rx_queue)))
 		afs_free_skb(skb);
 error_kill_call:
@@ -509,7 +510,8 @@ static void afs_deliver_to_call(struct afs_call *call)
 				if (call->state != AFS_CALL_AWAIT_REPLY)
 					abort_code = RXGEN_SS_UNMARSHAL;
 			do_abort:
-				rxrpc_kernel_abort_call(call->rxcall,
+				rxrpc_kernel_abort_call(afs_socket,
+							call->rxcall,
 							abort_code);
 				call->error = ret;
 				call->state = AFS_CALL_ERROR;
@@ -605,7 +607,7 @@ static int afs_wait_for_call_to_complete(struct afs_call *call)
 	/* kill the call */
 	if (call->state < AFS_CALL_COMPLETE) {
 		_debug("call incomplete");
-		rxrpc_kernel_abort_call(call->rxcall, RX_CALL_DEAD);
+		rxrpc_kernel_abort_call(afs_socket, call->rxcall, RX_CALL_DEAD);
 		while ((skb = skb_dequeue(&call->rx_queue)))
 			afs_free_skb(skb);
 	}
@@ -823,14 +825,15 @@ void afs_send_empty_reply(struct afs_call *call)
 	msg.msg_flags		= 0;
 
 	call->state = AFS_CALL_AWAIT_ACK;
-	switch (rxrpc_kernel_send_data(call->rxcall, &msg, 0)) {
+	switch (rxrpc_kernel_send_data(afs_socket, call->rxcall, &msg, 0)) {
 	case 0:
 		_leave(" [replied]");
 		return;
 
 	case -ENOMEM:
 		_debug("oom");
-		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
+		rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+					RX_USER_ABORT);
 	default:
 		afs_end_call(call);
 		_leave(" [error]");
@@ -859,7 +862,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 	msg.msg_flags		= 0;
 
 	call->state = AFS_CALL_AWAIT_ACK;
-	n = rxrpc_kernel_send_data(call->rxcall, &msg, len);
+	n = rxrpc_kernel_send_data(afs_socket, call->rxcall, &msg, len);
 	if (n >= 0) {
 		/* Success */
 		_leave(" [replied]");
@@ -868,7 +871,8 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 
 	if (n == -ENOMEM) {
 		_debug("oom");
-		rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
+		rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+					RX_USER_ABORT);
 	}
 	afs_end_call(call);
 	_leave(" [error]");

fs/afs/server.c

@@ -178,13 +178,18 @@ server_in_two_cells:
 /*
  * look up a server by its IP address
  */
-struct afs_server *afs_find_server(const struct in_addr *_addr)
+struct afs_server *afs_find_server(const struct sockaddr_rxrpc *srx)
 {
 	struct afs_server *server = NULL;
 	struct rb_node *p;
-	struct in_addr addr = *_addr;
+	struct in_addr addr = srx->transport.sin.sin_addr;
 
-	_enter("%pI4", &addr.s_addr);
+	_enter("{%d,%pI4}", srx->transport.family, &addr.s_addr);
+
+	if (srx->transport.family != AF_INET) {
+		WARN(true, "AFS does not yes support non-IPv4 addresses\n");
+		return NULL;
+	}
 
 	read_lock(&afs_servers_lock);
 

include/net/af_rxrpc.h

@@ -15,6 +15,9 @@
 #include <linux/skbuff.h>
 #include <linux/rxrpc.h>
 
+struct key;
+struct sock;
+struct socket;
 struct rxrpc_call;
 
 /*
@@ -39,15 +42,18 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *,
 					   struct key *,
 					   unsigned long,
 					   gfp_t);
-int rxrpc_kernel_send_data(struct rxrpc_call *, struct msghdr *, size_t);
+int rxrpc_kernel_send_data(struct socket *, struct rxrpc_call *,
+			   struct msghdr *, size_t);
 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
-void rxrpc_kernel_abort_call(struct rxrpc_call *, u32);
-void rxrpc_kernel_end_call(struct rxrpc_call *);
+void rxrpc_kernel_abort_call(struct socket *, struct rxrpc_call *, u32);
+void rxrpc_kernel_end_call(struct socket *, struct rxrpc_call *);
 bool rxrpc_kernel_is_data_last(struct sk_buff *);
 u32 rxrpc_kernel_get_abort_code(struct sk_buff *);
 int rxrpc_kernel_get_error_number(struct sk_buff *);
 void rxrpc_kernel_free_skb(struct sk_buff *);
 struct rxrpc_call *rxrpc_kernel_accept_call(struct socket *, unsigned long);
 int rxrpc_kernel_reject_call(struct socket *);
+void rxrpc_kernel_get_peer(struct socket *, struct rxrpc_call *,
+			   struct sockaddr_rxrpc *);
 
 #endif /* _NET_RXRPC_H */

include/trace/events/rxrpc.h

@@ -16,6 +16,45 @@
 
 #include <linux/tracepoint.h>
 
+TRACE_EVENT(rxrpc_call,
+	    TP_PROTO(struct rxrpc_call *call, int op, int usage, int nskb,
+		     const void *where, const void *aux),
+
+	    TP_ARGS(call, op, usage, nskb, where, aux),
+
+	    TP_STRUCT__entry(
+		    __field(struct rxrpc_call *,	call		)
+		    __field(int,			op		)
+		    __field(int,			usage		)
+		    __field(int,			nskb		)
+		    __field(const void *,		where		)
+		    __field(const void *,		aux		)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->call = call;
+		    __entry->op = op;
+		    __entry->usage = usage;
+		    __entry->nskb = nskb;
+		    __entry->where = where;
+		    __entry->aux = aux;
+			   ),
+
+	    TP_printk("c=%p %s u=%d s=%d p=%pSR a=%p",
+		      __entry->call,
+		      (__entry->op == 0 ? "NWc" :
+		       __entry->op == 1 ? "NWs" :
+		       __entry->op == 2 ? "SEE" :
+		       __entry->op == 3 ? "GET" :
+		       __entry->op == 4 ? "Gsb" :
+		       __entry->op == 5 ? "PUT" :
+		       "Psb"),
+		      __entry->usage,
+		      __entry->nskb,
+		      __entry->where,
+		      __entry->aux)
+	    );
+
 TRACE_EVENT(rxrpc_skb,
 	    TP_PROTO(struct sk_buff *skb, int op, int usage, int mod_count,
 		     const void *where),

net/rxrpc/af_rxrpc.c

@@ -279,15 +279,16 @@ EXPORT_SYMBOL(rxrpc_kernel_begin_call);
 
 /**
  * rxrpc_kernel_end_call - Allow a kernel service to end a call it was using
+ * @sock: The socket the call is on
  * @call: The call to end
  *
  * Allow a kernel service to end a call it was using.  The call must be
  * complete before this is called (the call should be aborted if necessary).
  */
-void rxrpc_kernel_end_call(struct rxrpc_call *call)
+void rxrpc_kernel_end_call(struct socket *sock, struct rxrpc_call *call)
 {
 	_enter("%d{%d}", call->debug_id, atomic_read(&call->usage));
-	rxrpc_remove_user_ID(call->socket, call);
+	rxrpc_remove_user_ID(rxrpc_sk(sock->sk), call);
 	rxrpc_put_call(call);
 }
 EXPORT_SYMBOL(rxrpc_kernel_end_call);

net/rxrpc/ar-internal.h

@@ -289,8 +289,6 @@ enum rxrpc_conn_proto_state {
 	RXRPC_CONN_SERVICE,		/* Service secured connection */
 	RXRPC_CONN_REMOTELY_ABORTED,	/* Conn aborted by peer */
 	RXRPC_CONN_LOCALLY_ABORTED,	/* Conn aborted locally */
-	RXRPC_CONN_NETWORK_ERROR,	/* Conn terminated by network error */
-	RXRPC_CONN_LOCAL_ERROR,		/* Conn terminated by local error */
 	RXRPC_CONN__NR_STATES
 };
 
@@ -344,7 +342,6 @@ struct rxrpc_connection {
 	enum rxrpc_conn_proto_state state : 8;	/* current state of connection */
 	u32			local_abort;	/* local abort code */
 	u32			remote_abort;	/* remote abort code */
-	int			error;		/* local error incurred */
 	int			debug_id;	/* debug ID for printks */
 	atomic_t		serial;		/* packet serial number counter */
 	unsigned int		hi_serial;	/* highest serial number received */
@@ -411,13 +408,22 @@ enum rxrpc_call_state {
 	RXRPC_CALL_SERVER_ACK_REQUEST,	/* - server pending ACK of request */
 	RXRPC_CALL_SERVER_SEND_REPLY,	/* - server sending reply */
 	RXRPC_CALL_SERVER_AWAIT_ACK,	/* - server awaiting final ACK */
-	RXRPC_CALL_COMPLETE,		/* - call completed */
+	RXRPC_CALL_COMPLETE,		/* - call complete */
+	RXRPC_CALL_DEAD,		/* - call is dead */
+	NR__RXRPC_CALL_STATES
+};
+
+/*
+ * Call completion condition (state == RXRPC_CALL_COMPLETE).
+ */
+enum rxrpc_call_completion {
+	RXRPC_CALL_SUCCEEDED,		/* - Normal termination */
 	RXRPC_CALL_SERVER_BUSY,		/* - call rejected by busy server */
 	RXRPC_CALL_REMOTELY_ABORTED,	/* - call aborted by peer */
 	RXRPC_CALL_LOCALLY_ABORTED,	/* - call aborted locally on error or close */
+	RXRPC_CALL_LOCAL_ERROR,		/* - call failed due to local error */
 	RXRPC_CALL_NETWORK_ERROR,	/* - call terminated by network error */
-	RXRPC_CALL_DEAD,		/* - call is dead */
-	NR__RXRPC_CALL_STATES
+	NR__RXRPC_CALL_COMPLETIONS
 };
 
 /*
@@ -451,14 +457,13 @@ struct rxrpc_call {
 	unsigned long		events;
 	spinlock_t		lock;
 	rwlock_t		state_lock;	/* lock for state transition */
+	u32			abort_code;	/* Local/remote abort code */
+	int			error;		/* Local error incurred */
+	enum rxrpc_call_state	state : 8;	/* current state of call */
+	enum rxrpc_call_completion completion : 8; /* Call completion condition */
 	atomic_t		usage;
 	atomic_t		skb_count;	/* Outstanding packets on this call */
 	atomic_t		sequence;	/* Tx data packet sequence counter */
-	u32			local_abort;	/* local abort code */
-	u32			remote_abort;	/* remote abort code */
-	int			error_report;	/* Network error (ICMP/local transport) */
-	int			error;		/* Local error incurred */
-	enum rxrpc_call_state	state : 8;	/* current state of call */
 	u16			service_id;	/* service ID */
 	u32			call_id;	/* call ID on connection  */
 	u32			cid;		/* connection ID plus channel index */
@@ -493,20 +498,6 @@ struct rxrpc_call {
 	unsigned long		ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
 };
 
-/*
- * locally abort an RxRPC call
- */
-static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
-{
-	write_lock_bh(&call->state_lock);
-	if (call->state < RXRPC_CALL_COMPLETE) {
-		call->local_abort = abort_code;
-		call->state = RXRPC_CALL_LOCALLY_ABORTED;
-		set_bit(RXRPC_CALL_EV_ABORT, &call->events);
-	}
-	write_unlock_bh(&call->state_lock);
-}
-
 #include <trace/events/rxrpc.h>
 
 /*
@@ -534,6 +525,8 @@ void rxrpc_process_call(struct work_struct *);
 /*
  * call_object.c
  */
+extern const char *const rxrpc_call_states[];
+extern const char *const rxrpc_call_completions[];
 extern unsigned int rxrpc_max_call_lifetime;
 extern unsigned int rxrpc_dead_call_expiry;
 extern struct kmem_cache *rxrpc_call_jar;
@@ -550,7 +543,11 @@ struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
 				       struct sk_buff *);
 void rxrpc_release_call(struct rxrpc_call *);
 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
-void __rxrpc_put_call(struct rxrpc_call *);
+void rxrpc_see_call(struct rxrpc_call *);
+void rxrpc_get_call(struct rxrpc_call *);
+void rxrpc_put_call(struct rxrpc_call *);
+void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *);
+void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *);
 void __exit rxrpc_destroy_all_calls(void);
 
 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
@@ -563,6 +560,78 @@ static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
 	return !rxrpc_is_service_call(call);
 }
 
+/*
+ * Transition a call to the complete state.
+ */
+static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
+					       enum rxrpc_call_completion compl,
+					       u32 abort_code,
+					       int error)
+{
+	if (call->state < RXRPC_CALL_COMPLETE) {
+		call->abort_code = abort_code;
+		call->error = error;
+		call->completion = compl,
+		call->state = RXRPC_CALL_COMPLETE;
+		return true;
+	}
+	return false;
+}
+
+static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
+					     enum rxrpc_call_completion compl,
+					     u32 abort_code,
+					     int error)
+{
+	int ret;
+
+	write_lock_bh(&call->state_lock);
+	ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
+	write_unlock_bh(&call->state_lock);
+	return ret;
+}
+
+/*
+ * Record that a call successfully completed.
+ */
+static inline void __rxrpc_call_completed(struct rxrpc_call *call)
+{
+	__rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
+}
+
+static inline void rxrpc_call_completed(struct rxrpc_call *call)
+{
+	write_lock_bh(&call->state_lock);
+	__rxrpc_call_completed(call);
+	write_unlock_bh(&call->state_lock);
+}
+
+/*
+ * Record that a call is locally aborted.
+ */
+static inline bool __rxrpc_abort_call(struct rxrpc_call *call,
+				      u32 abort_code, int error)
+{
+	if (__rxrpc_set_call_completion(call,
+					RXRPC_CALL_LOCALLY_ABORTED,
+					abort_code, error)) {
+		set_bit(RXRPC_CALL_EV_ABORT, &call->events);
+		return true;
+	}
+	return false;
+}
+
+static inline bool rxrpc_abort_call(struct rxrpc_call *call,
+				    u32 abort_code, int error)
+{
+	bool ret;
+
+	write_lock_bh(&call->state_lock);
+	ret = __rxrpc_abort_call(call, abort_code, error);
+	write_unlock_bh(&call->state_lock);
+	return ret;
+}
+
 /*
  * conn_client.c
  */
@@ -778,7 +847,6 @@ static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
 /*
  * proc.c
  */
-extern const char *const rxrpc_call_states[];
 extern const struct file_operations rxrpc_call_seq_fops;
 extern const struct file_operations rxrpc_connection_seq_fops;
 
@@ -958,16 +1026,3 @@ do {						\
 } while (0)
 
 #endif /* __KDEBUGALL */
-
-
-#define rxrpc_get_call(CALL)				\
-do {							\
-	CHECK_SLAB_OKAY(&(CALL)->usage);		\
-	if (atomic_inc_return(&(CALL)->usage) == 1)	\
-		BUG();					\
-} while (0)
-
-#define rxrpc_put_call(CALL)				\
-do {							\
-	__rxrpc_put_call(CALL);				\
-} while (0)

net/rxrpc/call_accept.c

@@ -129,8 +129,7 @@ static int rxrpc_accept_incoming_call(struct rxrpc_local *local,
 			_debug("conn ready");
 			call->state = RXRPC_CALL_SERVER_ACCEPTING;
 			list_add_tail(&call->accept_link, &rx->acceptq);
-			rxrpc_get_call(call);
-			atomic_inc(&call->skb_count);
+			rxrpc_get_call_for_skb(call, notification);
 			nsp = rxrpc_skb(notification);
 			nsp->call = call;
 
@@ -323,18 +322,15 @@ struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *rx,
 	call = list_entry(rx->acceptq.next, struct rxrpc_call, accept_link);
 	list_del_init(&call->accept_link);
 	sk_acceptq_removed(&rx->sk);
+	rxrpc_see_call(call);
 
 	write_lock_bh(&call->state_lock);
 	switch (call->state) {
 	case RXRPC_CALL_SERVER_ACCEPTING:
 		call->state = RXRPC_CALL_SERVER_RECV_REQUEST;
 		break;
-	case RXRPC_CALL_REMOTELY_ABORTED:
-	case RXRPC_CALL_LOCALLY_ABORTED:
-		ret = -ECONNABORTED;
-		goto out_release;
-	case RXRPC_CALL_NETWORK_ERROR:
-		ret = call->conn->error;
+	case RXRPC_CALL_COMPLETE:
+		ret = call->error;
 		goto out_release;
 	case RXRPC_CALL_DEAD:
 		ret = -ETIME;
@@ -399,21 +395,19 @@ int rxrpc_reject_call(struct rxrpc_sock *rx)
 	call = list_entry(rx->acceptq.next, struct rxrpc_call, accept_link);
 	list_del_init(&call->accept_link);
 	sk_acceptq_removed(&rx->sk);
+	rxrpc_see_call(call);
 
 	write_lock_bh(&call->state_lock);
 	switch (call->state) {
 	case RXRPC_CALL_SERVER_ACCEPTING:
-		call->state = RXRPC_CALL_SERVER_BUSY;
+		__rxrpc_set_call_completion(call, RXRPC_CALL_SERVER_BUSY,
+					    0, ECONNABORTED);
 		if (test_and_set_bit(RXRPC_CALL_EV_REJECT_BUSY, &call->events))
 			rxrpc_queue_call(call);
 		ret = 0;
 		goto out_release;
-	case RXRPC_CALL_REMOTELY_ABORTED:
-	case RXRPC_CALL_LOCALLY_ABORTED:
-		ret = -ECONNABORTED;
-		goto out_release;
-	case RXRPC_CALL_NETWORK_ERROR:
-		ret = call->conn->error;
+	case RXRPC_CALL_COMPLETE:
+		ret = call->error;
 		goto out_release;
 	case RXRPC_CALL_DEAD:
 		ret = -ETIME;

net/rxrpc/call_event.c

@@ -95,7 +95,7 @@ cancel_timer:
 	_debug("cancel timer %%%u", serial);
 	try_to_del_timer_sync(&call->ack_timer);
 	read_lock_bh(&call->state_lock);
-	if (call->state <= RXRPC_CALL_COMPLETE &&
+	if (call->state < RXRPC_CALL_COMPLETE &&
 	    !test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events))
 		rxrpc_queue_call(call);
 	read_unlock_bh(&call->state_lock);
@@ -123,7 +123,7 @@ static void rxrpc_set_resend(struct rxrpc_call *call, u8 resend,
 			     unsigned long resend_at)
 {
 	read_lock_bh(&call->state_lock);
-	if (call->state >= RXRPC_CALL_COMPLETE)
+	if (call->state == RXRPC_CALL_COMPLETE)
 		resend = 0;
 
 	if (resend & 1) {
@@ -230,7 +230,7 @@ static void rxrpc_resend_timer(struct rxrpc_call *call)
 	_enter("%d,%d,%d",
 	       call->acks_tail, call->acks_unacked, call->acks_head);
 
-	if (call->state >= RXRPC_CALL_COMPLETE)
+	if (call->state == RXRPC_CALL_COMPLETE)
 		return;
 
 	resend = 0;
@@ -465,8 +465,7 @@ static void rxrpc_insert_oos_packet(struct rxrpc_call *call,
 	skb->destructor = rxrpc_packet_destructor;
 	ASSERTCMP(sp->call, ==, NULL);
 	sp->call = call;
-	rxrpc_get_call(call);
-	atomic_inc(&call->skb_count);
+	rxrpc_get_call_for_skb(call, skb);
 
 	/* insert into the buffer in sequence order */
 	spin_lock_bh(&call->lock);
@@ -552,7 +551,7 @@ static void rxrpc_extract_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
 
 	mtu = min(ntohl(ackinfo.rxMTU), ntohl(ackinfo.maxMTU));
 
-	peer = call->conn->params.peer;
+	peer = call->peer;
 	if (mtu < peer->maxdata) {
 		spin_lock_bh(&peer->lock);
 		peer->maxdata = mtu;
@@ -711,7 +710,7 @@ all_acked:
 		break;
 	case RXRPC_CALL_SERVER_AWAIT_ACK:
 		_debug("srv complete");
-		call->state = RXRPC_CALL_COMPLETE;
+		__rxrpc_call_completed(call);
 		post_ACK = true;
 		break;
 	case RXRPC_CALL_CLIENT_SEND_REQUEST:
@@ -741,8 +740,7 @@ all_acked:
 		_debug("post ACK");
 		skb->mark = RXRPC_SKB_MARK_FINAL_ACK;
 		sp->call = call;
-		rxrpc_get_call(call);
-		atomic_inc(&call->skb_count);
+		rxrpc_get_call_for_skb(call, skb);
 		spin_lock_bh(&call->lock);
 		if (rxrpc_queue_rcv_skb(call, skb, true, true) < 0)
 			BUG();
@@ -801,8 +799,7 @@ static int rxrpc_post_message(struct rxrpc_call *call, u32 mark, u32 error,
 		memset(sp, 0, sizeof(*sp));
 		sp->error = error;
 		sp->call = call;
-		rxrpc_get_call(call);
-		atomic_inc(&call->skb_count);
+		rxrpc_get_call_for_skb(call, skb);
 
 		spin_lock_bh(&call->lock);
 		ret = rxrpc_queue_rcv_skb(call, skb, true, fatal);
@@ -834,6 +831,8 @@ void rxrpc_process_call(struct work_struct *work)
 	u32 serial, abort_code = RX_PROTOCOL_ERROR;
 	u8 *acks = NULL;
 
+	rxrpc_see_call(call);
+
 	//printk("\n--------------------\n");
 	_enter("{%d,%s,%lx} [%lu]",
 	       call->debug_id, rxrpc_call_states[call->state], call->events,
@@ -844,8 +843,8 @@ void rxrpc_process_call(struct work_struct *work)
 
 	/* there's a good chance we're going to have to send a message, so set
 	 * one up in advance */
-	msg.msg_name	= &call->conn->params.peer->srx.transport;
-	msg.msg_namelen	= call->conn->params.peer->srx.transport_len;
+	msg.msg_name	= &call->peer->srx.transport;
+	msg.msg_namelen	= call->peer->srx.transport_len;
 	msg.msg_control	= NULL;
 	msg.msg_controllen = 0;
 	msg.msg_flags	= 0;
@@ -875,24 +874,22 @@ skip_msg_init:
 		clear_bit(RXRPC_CALL_EV_REJECT_BUSY, &call->events);
 		clear_bit(RXRPC_CALL_EV_ABORT, &call->events);
 
-		error = call->error_report;
-		if (error < RXRPC_LOCAL_ERROR_OFFSET) {
+		if (call->completion == RXRPC_CALL_NETWORK_ERROR) {
 			mark = RXRPC_SKB_MARK_NET_ERROR;
 			_debug("post net error %d", error);
 		} else {
 			mark = RXRPC_SKB_MARK_LOCAL_ERROR;
-			error -= RXRPC_LOCAL_ERROR_OFFSET;
 			_debug("post net local error %d", error);
 		}
 
-		if (rxrpc_post_message(call, mark, error, true) < 0)
+		if (rxrpc_post_message(call, mark, call->error, true) < 0)
 			goto no_mem;
 		clear_bit(RXRPC_CALL_EV_RCVD_ERROR, &call->events);
 		goto kill_ACKs;
 	}
 
 	if (test_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events)) {
-		ASSERTCMP(call->state, >, RXRPC_CALL_COMPLETE);
+		ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
 
 		clear_bit(RXRPC_CALL_EV_REJECT_BUSY, &call->events);
 		clear_bit(RXRPC_CALL_EV_ABORT, &call->events);
@@ -900,7 +897,7 @@ skip_msg_init:
 		_debug("post conn abort");
 
 		if (rxrpc_post_message(call, RXRPC_SKB_MARK_LOCAL_ERROR,
-				       call->conn->error, true) < 0)
+				       call->error, true) < 0)
 			goto no_mem;
 		clear_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
 		goto kill_ACKs;
@@ -913,13 +910,13 @@ skip_msg_init:
 	}
 
 	if (test_bit(RXRPC_CALL_EV_ABORT, &call->events)) {
-		ASSERTCMP(call->state, >, RXRPC_CALL_COMPLETE);
+		ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
 
 		if (rxrpc_post_message(call, RXRPC_SKB_MARK_LOCAL_ERROR,
-				       ECONNABORTED, true) < 0)
+				       call->error, true) < 0)
 			goto no_mem;
 		whdr.type = RXRPC_PACKET_TYPE_ABORT;
-		data = htonl(call->local_abort);
+		data = htonl(call->abort_code);
 		iov[1].iov_base = &data;
 		iov[1].iov_len = sizeof(data);
 		genbit = RXRPC_CALL_EV_ABORT;
@@ -979,13 +976,7 @@ skip_msg_init:
 	}
 
 	if (test_bit(RXRPC_CALL_EV_LIFE_TIMER, &call->events)) {
-		write_lock_bh(&call->state_lock);
-		if (call->state <= RXRPC_CALL_COMPLETE) {
-			call->state = RXRPC_CALL_LOCALLY_ABORTED;
-			call->local_abort = RX_CALL_TIMEOUT;
-			set_bit(RXRPC_CALL_EV_ABORT, &call->events);
-		}
-		write_unlock_bh(&call->state_lock);
+		rxrpc_abort_call(call, RX_CALL_TIMEOUT, ETIME);
 
 		_debug("post timeout");
 		if (rxrpc_post_message(call, RXRPC_SKB_MARK_LOCAL_ERROR,
@@ -998,7 +989,8 @@ skip_msg_init:
 
 	/* deal with assorted inbound messages */
 	if (!skb_queue_empty(&call->rx_queue)) {
-		switch (rxrpc_process_rx_queue(call, &abort_code)) {
+		ret = rxrpc_process_rx_queue(call, &abort_code);
+		switch (ret) {
 		case 0:
 		case -EAGAIN:
 			break;
@@ -1007,7 +999,7 @@ skip_msg_init:
 		case -EKEYEXPIRED:
 		case -EKEYREJECTED:
 		case -EPROTO:
-			rxrpc_abort_call(call, abort_code);
+			rxrpc_abort_call(call, abort_code, -ret);
 			goto kill_ACKs;
 		}
 	}
@@ -1159,8 +1151,8 @@ skip_msg_init:
 send_ACK_with_skew:
 	ack.maxSkew = htons(call->ackr_skew);
 send_ACK:
-	mtu = call->conn->params.peer->if_mtu;
-	mtu -= call->conn->params.peer->hdrsize;
+	mtu = call->peer->if_mtu;
+	mtu -= call->peer->hdrsize;
 	ackinfo.maxMTU	= htonl(mtu);
 	ackinfo.rwind	= htonl(rxrpc_rx_window_size);
 
@@ -1232,10 +1224,7 @@ send_message_2:
 		goto kill_ACKs;
 
 	case RXRPC_CALL_EV_ACK_FINAL:
-		write_lock_bh(&call->state_lock);
-		if (call->state == RXRPC_CALL_CLIENT_FINAL_ACK)
-			call->state = RXRPC_CALL_COMPLETE;
-		write_unlock_bh(&call->state_lock);
+		rxrpc_call_completed(call);
 		goto kill_ACKs;
 
 	default:

net/rxrpc/call_object.c

@@ -30,7 +30,7 @@ unsigned int rxrpc_max_call_lifetime = 60 * HZ;
 unsigned int rxrpc_dead_call_expiry = 2 * HZ;
 
 const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = {
-	[RXRPC_CALL_UNINITIALISED]		= "Uninit",
+	[RXRPC_CALL_UNINITIALISED]		= "Uninit  ",
 	[RXRPC_CALL_CLIENT_AWAIT_CONN]		= "ClWtConn",
 	[RXRPC_CALL_CLIENT_SEND_REQUEST]	= "ClSndReq",
 	[RXRPC_CALL_CLIENT_AWAIT_REPLY]		= "ClAwtRpl",
@@ -43,11 +43,16 @@ const char *const rxrpc_call_states[NR__RXRPC_CALL_STATES] = {
 	[RXRPC_CALL_SERVER_SEND_REPLY]		= "SvSndRpl",
 	[RXRPC_CALL_SERVER_AWAIT_ACK]		= "SvAwtACK",
 	[RXRPC_CALL_COMPLETE]			= "Complete",
+	[RXRPC_CALL_DEAD]			= "Dead    ",
+};
+
+const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = {
+	[RXRPC_CALL_SUCCEEDED]			= "Complete",
 	[RXRPC_CALL_SERVER_BUSY]		= "SvBusy  ",
 	[RXRPC_CALL_REMOTELY_ABORTED]		= "RmtAbort",
 	[RXRPC_CALL_LOCALLY_ABORTED]		= "LocAbort",
+	[RXRPC_CALL_LOCAL_ERROR]		= "LocError",
 	[RXRPC_CALL_NETWORK_ERROR]		= "NetError",
-	[RXRPC_CALL_DEAD]			= "Dead    ",
 };
 
 struct kmem_cache *rxrpc_call_jar;
@@ -214,6 +219,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
 {
 	struct rxrpc_call *call, *xcall;
 	struct rb_node *parent, **pp;
+	const void *here = __builtin_return_address(0);
 	int ret;
 
 	_enter("%p,%lx", rx, user_call_ID);
@@ -224,6 +230,9 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
 		return call;
 	}
 
+	trace_rxrpc_call(call, 0, atomic_read(&call->usage), 0, here,
+			 (const void *)user_call_ID);
+
 	/* Publish the call, even though it is incompletely set up as yet */
 	call->user_call_ID = user_call_ID;
 	__set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
@@ -303,6 +312,7 @@ struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *rx,
 {
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
 	struct rxrpc_call *call, *candidate;
+	const void *here = __builtin_return_address(0);
 	u32 call_id, chan;
 
 	_enter(",%d", conn->debug_id);
@@ -313,6 +323,9 @@ struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *rx,
 	if (!candidate)
 		return ERR_PTR(-EBUSY);
 
+	trace_rxrpc_call(candidate, 1, atomic_read(&candidate->usage),
+			 0, here, NULL);
+
 	chan = sp->hdr.cid & RXRPC_CHANNELMASK;
 	candidate->socket	= rx;
 	candidate->conn		= conn;
@@ -358,7 +371,7 @@ struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *rx,
 		_debug("CALL: %u { %s }",
 		       call->debug_id, rxrpc_call_states[call->state]);
 
-		if (call->state >= RXRPC_CALL_COMPLETE) {
+		if (call->state == RXRPC_CALL_COMPLETE) {
 			__rxrpc_disconnect_call(conn, call);
 		} else {
 			spin_unlock(&conn->channel_lock);
@@ -425,6 +438,44 @@ old_call:
 	return ERR_PTR(-ECONNRESET);
 }
 
+/*
+ * Note the re-emergence of a call.
+ */
+void rxrpc_see_call(struct rxrpc_call *call)
+{
+	const void *here = __builtin_return_address(0);
+	if (call) {
+		int n = atomic_read(&call->usage);
+		int m = atomic_read(&call->skb_count);
+
+		trace_rxrpc_call(call, 2, n, m, here, 0);
+	}
+}
+
+/*
+ * Note the addition of a ref on a call.
+ */
+void rxrpc_get_call(struct rxrpc_call *call)
+{
+	const void *here = __builtin_return_address(0);
+	int n = atomic_inc_return(&call->usage);
+	int m = atomic_read(&call->skb_count);
+
+	trace_rxrpc_call(call, 3, n, m, here, 0);
+}
+
+/*
+ * Note the addition of a ref on a call for a socket buffer.
+ */
+void rxrpc_get_call_for_skb(struct rxrpc_call *call, struct sk_buff *skb)
+{
+	const void *here = __builtin_return_address(0);
+	int n = atomic_inc_return(&call->usage);
+	int m = atomic_inc_return(&call->skb_count);
+
+	trace_rxrpc_call(call, 4, n, m, here, skb);
+}
+
 /*
  * detach a call from a socket and set up for release
  */
@@ -438,6 +489,8 @@ void rxrpc_release_call(struct rxrpc_call *call)
 	       atomic_read(&call->ackr_not_idle),
 	       call->rx_first_oos);
 
+	rxrpc_see_call(call);
+
 	spin_lock_bh(&call->lock);
 	if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
 		BUG();
@@ -472,8 +525,7 @@ void rxrpc_release_call(struct rxrpc_call *call)
 	if (call->state < RXRPC_CALL_COMPLETE &&
 	    call->state != RXRPC_CALL_CLIENT_FINAL_ACK) {
 		_debug("+++ ABORTING STATE %d +++\n", call->state);
-		call->state = RXRPC_CALL_LOCALLY_ABORTED;
-		call->local_abort = RX_CALL_DEAD;
+		__rxrpc_abort_call(call, RX_CALL_DEAD, ECONNRESET);
 	}
 	write_unlock_bh(&call->state_lock);
 
@@ -522,6 +574,7 @@ static void rxrpc_dead_call_expired(unsigned long _call)
 
 	_enter("{%d}", call->debug_id);
 
+	rxrpc_see_call(call);
 	write_lock_bh(&call->state_lock);
 	call->state = RXRPC_CALL_DEAD;
 	write_unlock_bh(&call->state_lock);
@@ -536,22 +589,16 @@ static void rxrpc_mark_call_released(struct rxrpc_call *call)
 {
 	bool sched;
 
+	rxrpc_see_call(call);
 	write_lock(&call->state_lock);
 	if (call->state < RXRPC_CALL_DEAD) {
-		sched = false;
-		if (call->state < RXRPC_CALL_COMPLETE) {
-			_debug("abort call %p", call);
-			call->state = RXRPC_CALL_LOCALLY_ABORTED;
-			call->local_abort = RX_CALL_DEAD;
-			if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events))
-				sched = true;
-		}
+		sched = __rxrpc_abort_call(call, RX_CALL_DEAD, ECONNRESET);
 		if (!test_and_set_bit(RXRPC_CALL_EV_RELEASE, &call->events))
 			sched = true;
-		if (sched)
-			rxrpc_queue_call(call);
 	}
 	write_unlock(&call->state_lock);
+	if (sched)
+		rxrpc_queue_call(call);
 }
 
 /*
@@ -588,21 +635,43 @@ void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
 /*
  * release a call
  */
-void __rxrpc_put_call(struct rxrpc_call *call)
+void rxrpc_put_call(struct rxrpc_call *call)
 {
-	ASSERT(call != NULL);
+	const void *here = __builtin_return_address(0);
+	int n, m;
 
-	_enter("%p{u=%d}", call, atomic_read(&call->usage));
+	ASSERT(call != NULL);
 
-	ASSERTCMP(atomic_read(&call->usage), >, 0);
+	n = atomic_dec_return(&call->usage);
+	m = atomic_read(&call->skb_count);
+	trace_rxrpc_call(call, 5, n, m, here, NULL);
+	ASSERTCMP(n, >=, 0);
+	if (n == 0) {
+		_debug("call %d dead", call->debug_id);
+		WARN_ON(m != 0);
+		ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD);
+		rxrpc_queue_work(&call->destroyer);
+	}
+}
 
-	if (atomic_dec_and_test(&call->usage)) {
+/*
+ * Release a call ref held by a socket buffer.
+ */
+void rxrpc_put_call_for_skb(struct rxrpc_call *call, struct sk_buff *skb)
+{
+	const void *here = __builtin_return_address(0);
+	int n, m;
+
+	n = atomic_dec_return(&call->usage);
+	m = atomic_dec_return(&call->skb_count);
+	trace_rxrpc_call(call, 6, n, m, here, skb);
+	ASSERTCMP(n, >=, 0);
+	if (n == 0) {
 		_debug("call %d dead", call->debug_id);
-		WARN_ON(atomic_read(&call->skb_count) != 0);
+		WARN_ON(m != 0);
 		ASSERTCMP(call->state, ==, RXRPC_CALL_DEAD);
 		rxrpc_queue_work(&call->destroyer);
 	}
-	_leave("");
 }
 
 /*
@@ -708,6 +777,7 @@ void __exit rxrpc_destroy_all_calls(void)
 		call = list_entry(rxrpc_calls.next, struct rxrpc_call, link);
 		_debug("Zapping call %p", call);
 
+		rxrpc_see_call(call);
 		list_del_init(&call->link);
 
 		switch (atomic_read(&call->usage)) {
@@ -749,16 +819,14 @@ static void rxrpc_call_life_expired(unsigned long _call)
 {
 	struct rxrpc_call *call = (struct rxrpc_call *) _call;
 
+	_enter("{%d}", call->debug_id);
+
+	rxrpc_see_call(call);
 	if (call->state >= RXRPC_CALL_COMPLETE)
 		return;
 
-	_enter("{%d}", call->debug_id);
-	read_lock_bh(&call->state_lock);
-	if (call->state < RXRPC_CALL_COMPLETE) {
-		set_bit(RXRPC_CALL_EV_LIFE_TIMER, &call->events);
-		rxrpc_queue_call(call);
-	}
-	read_unlock_bh(&call->state_lock);
+	set_bit(RXRPC_CALL_EV_LIFE_TIMER, &call->events);
+	rxrpc_queue_call(call);
 }
 
 /*
@@ -771,6 +839,7 @@ static void rxrpc_resend_time_expired(unsigned long _call)
 
 	_enter("{%d}", call->debug_id);
 
+	rxrpc_see_call(call);
 	if (call->state >= RXRPC_CALL_COMPLETE)
 		return;
 
@@ -788,12 +857,10 @@ static void rxrpc_ack_time_expired(unsigned long _call)
 
 	_enter("{%d}", call->debug_id);
 
+	rxrpc_see_call(call);
 	if (call->state >= RXRPC_CALL_COMPLETE)
 		return;
 
-	read_lock_bh(&call->state_lock);
-	if (call->state < RXRPC_CALL_COMPLETE &&
-	    !test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events))
+	if (!test_and_set_bit(RXRPC_CALL_EV_ACK, &call->events))
 		rxrpc_queue_call(call);
-	read_unlock_bh(&call->state_lock);
 }

net/rxrpc/conn_client.c

@@ -537,6 +537,7 @@ static void rxrpc_activate_one_channel(struct rxrpc_connection *conn,
 					     struct rxrpc_call, chan_wait_link);
 	u32 call_id = chan->call_counter + 1;
 
+	rxrpc_see_call(call);
 	list_del_init(&call->chan_wait_link);
 	conn->active_chans |= 1 << channel;
 	call->peer	= rxrpc_get_peer(conn->params.peer);
@@ -741,7 +742,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
 	 * terminal retransmission without requiring access to the call.
 	 */
 	if (test_bit(RXRPC_CALL_EXPOSED, &call->flags)) {
-		_debug("exposed %u,%u", call->call_id, call->local_abort);
+		_debug("exposed %u,%u", call->call_id, call->abort_code);
 		__rxrpc_disconnect_call(conn, call);
 	}
 

net/rxrpc/conn_event.c

@@ -27,8 +27,8 @@
 /*
  * Retransmit terminal ACK or ABORT of the previous call.
  */
-static void rxrpc_conn_retransmit(struct rxrpc_connection *conn,
-				  struct sk_buff *skb)
+static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
+				       struct sk_buff *skb)
 {
 	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
 	struct rxrpc_channel *chan;
@@ -135,33 +135,39 @@ static void rxrpc_conn_retransmit(struct rxrpc_connection *conn,
 /*
  * pass a connection-level abort onto all calls on that connection
  */
-static void rxrpc_abort_calls(struct rxrpc_connection *conn, int state,
-			      u32 abort_code)
+static void rxrpc_abort_calls(struct rxrpc_connection *conn,
+			      enum rxrpc_call_completion compl,
+			      u32 abort_code, int error)
 {
 	struct rxrpc_call *call;
-	int i;
+	bool queue;
+	int i, bit;
 
 	_enter("{%d},%x", conn->debug_id, abort_code);
 
+	if (compl == RXRPC_CALL_LOCALLY_ABORTED)
+		bit = RXRPC_CALL_EV_CONN_ABORT;
+	else
+		bit = RXRPC_CALL_EV_RCVD_ABORT;
+
 	spin_lock(&conn->channel_lock);
 
 	for (i = 0; i < RXRPC_MAXCALLS; i++) {
 		call = rcu_dereference_protected(
 			conn->channels[i].call,
 			lockdep_is_held(&conn->channel_lock));
-		write_lock_bh(&call->state_lock);
-		if (call->state <= RXRPC_CALL_COMPLETE) {
-			call->state = state;
-			if (state == RXRPC_CALL_LOCALLY_ABORTED) {
-				call->local_abort = conn->local_abort;
-				set_bit(RXRPC_CALL_EV_CONN_ABORT, &call->events);
-			} else {
-				call->remote_abort = conn->remote_abort;
-				set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
+		if (call) {
+			rxrpc_see_call(call);
+			write_lock_bh(&call->state_lock);
+			if (rxrpc_set_call_completion(call, compl, abort_code,
+						      error)) {
+				set_bit(bit, &call->events);
+				queue = true;
 			}
-			rxrpc_queue_call(call);
+			write_unlock_bh(&call->state_lock);
+			if (queue)
+				rxrpc_queue_call(call);
 		}
-		write_unlock_bh(&call->state_lock);
 	}
 
 	spin_unlock(&conn->channel_lock);
@@ -186,17 +192,16 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn,
 
 	/* generate a connection-level abort */
 	spin_lock_bh(&conn->state_lock);
-	if (conn->state < RXRPC_CONN_REMOTELY_ABORTED) {
-		conn->state = RXRPC_CONN_LOCALLY_ABORTED;
-		conn->error = error;
-		spin_unlock_bh(&conn->state_lock);
-	} else {
+	if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
 		spin_unlock_bh(&conn->state_lock);
 		_leave(" = 0 [already dead]");
 		return 0;
 	}
 
-	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code);
+	conn->state = RXRPC_CONN_LOCALLY_ABORTED;
+	spin_unlock_bh(&conn->state_lock);
+
+	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code, error);
 
 	msg.msg_name	= &conn->params.peer->srx.transport;
 	msg.msg_namelen	= conn->params.peer->srx.transport_len;
@@ -276,7 +281,7 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
 	switch (sp->hdr.type) {
 	case RXRPC_PACKET_TYPE_DATA:
 	case RXRPC_PACKET_TYPE_ACK:
-		rxrpc_conn_retransmit(conn, skb);
+		rxrpc_conn_retransmit_call(conn, skb);
 		rxrpc_free_skb(skb);
 		return 0;
 
@@ -287,7 +292,7 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
 		_proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code);
 
 		conn->state = RXRPC_CONN_REMOTELY_ABORTED;
-		rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED,
+		rxrpc_abort_calls(conn, 0, RXRPC_CALL_REMOTELY_ABORTED,
 				  abort_code);
 		return -ECONNABORTED;
 

net/rxrpc/conn_object.c

@@ -165,8 +165,8 @@ void __rxrpc_disconnect_call(struct rxrpc_connection *conn,
 		 * through the channel, whilst disposing of the actual call record.
 		 */
 		chan->last_service_id = call->service_id;
-		if (call->local_abort) {
-			chan->last_abort = call->local_abort;
+		if (call->abort_code) {
+			chan->last_abort = call->abort_code;
 			chan->last_type = RXRPC_PACKET_TYPE_ABORT;
 		} else {
 			chan->last_seq = call->rx_data_eaten;

net/rxrpc/input.c

@@ -196,8 +196,7 @@ static int rxrpc_fast_process_data(struct rxrpc_call *call,
 		goto enqueue_packet;
 
 	sp->call = call;
-	rxrpc_get_call(call);
-	atomic_inc(&call->skb_count);
+	rxrpc_get_call_for_skb(call, skb);
 	terminal = ((flags & RXRPC_LAST_PACKET) &&
 		    !(flags & RXRPC_CLIENT_INITIATED));
 	ret = rxrpc_queue_rcv_skb(call, skb, false, terminal);
@@ -341,14 +340,13 @@ void rxrpc_fast_process_packet(struct rxrpc_call *call, struct sk_buff *skb)
 		abort_code = ntohl(wtmp);
 		_proto("Rx ABORT %%%u { %x }", sp->hdr.serial, abort_code);
 
-		write_lock_bh(&call->state_lock);
-		if (call->state < RXRPC_CALL_COMPLETE) {
-			call->state = RXRPC_CALL_REMOTELY_ABORTED;
-			call->remote_abort = abort_code;
+		if (__rxrpc_set_call_completion(call,
+						RXRPC_CALL_REMOTELY_ABORTED,
+						abort_code, ECONNABORTED)) {
 			set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events);
 			rxrpc_queue_call(call);
 		}
-		goto free_packet_unlock;
+		goto free_packet;
 
 	case RXRPC_PACKET_TYPE_BUSY:
 		_proto("Rx BUSY %%%u", sp->hdr.serial);
@@ -359,7 +357,9 @@ void rxrpc_fast_process_packet(struct rxrpc_call *call, struct sk_buff *skb)
 		write_lock_bh(&call->state_lock);
 		switch (call->state) {
 		case RXRPC_CALL_CLIENT_SEND_REQUEST:
-			call->state = RXRPC_CALL_SERVER_BUSY;
+			__rxrpc_set_call_completion(call,
+						    RXRPC_CALL_SERVER_BUSY,
+						    0, EBUSY);
 			set_bit(RXRPC_CALL_EV_RCVD_BUSY, &call->events);
 			rxrpc_queue_call(call);
 		case RXRPC_CALL_SERVER_BUSY:
@@ -415,12 +415,8 @@ protocol_error:
 	_debug("protocol error");
 	write_lock_bh(&call->state_lock);
 protocol_error_locked:
-	if (call->state <= RXRPC_CALL_COMPLETE) {
-		call->state = RXRPC_CALL_LOCALLY_ABORTED;
-		call->local_abort = RX_PROTOCOL_ERROR;
-		set_bit(RXRPC_CALL_EV_ABORT, &call->events);
+	if (__rxrpc_abort_call(call, RX_PROTOCOL_ERROR, EPROTO))
 		rxrpc_queue_call(call);
-	}
 free_packet_unlock:
 	write_unlock_bh(&call->state_lock);
 free_packet:
@@ -486,14 +482,8 @@ protocol_error:
 	_debug("protocol error");
 	rxrpc_free_skb(part);
 	rxrpc_free_skb(jumbo);
-	write_lock_bh(&call->state_lock);
-	if (call->state <= RXRPC_CALL_COMPLETE) {
-		call->state = RXRPC_CALL_LOCALLY_ABORTED;
-		call->local_abort = RX_PROTOCOL_ERROR;
-		set_bit(RXRPC_CALL_EV_ABORT, &call->events);
+	if (rxrpc_abort_call(call, RX_PROTOCOL_ERROR, EPROTO))
 		rxrpc_queue_call(call);
-	}
-	write_unlock_bh(&call->state_lock);
 	_leave("");
 }
 
@@ -514,26 +504,28 @@ static void rxrpc_post_packet_to_call(struct rxrpc_call *call,
 
 	read_lock(&call->state_lock);
 	switch (call->state) {
-	case RXRPC_CALL_LOCALLY_ABORTED:
-		if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) {
-			rxrpc_queue_call(call);
-			goto free_unlock;
-		}
-	case RXRPC_CALL_REMOTELY_ABORTED:
-	case RXRPC_CALL_NETWORK_ERROR:
 	case RXRPC_CALL_DEAD:
 		goto dead_call;
+
 	case RXRPC_CALL_COMPLETE:
-	case RXRPC_CALL_CLIENT_FINAL_ACK:
-		/* complete server call */
-		if (rxrpc_conn_is_service(call->conn))
+		switch (call->completion) {
+		case RXRPC_CALL_LOCALLY_ABORTED:
+			if (!test_and_set_bit(RXRPC_CALL_EV_ABORT,
+					      &call->events)) {
+				rxrpc_queue_call(call);
+				goto free_unlock;
+			}
+		default:
 			goto dead_call;
-		/* resend last packet of a completed call */
-		_debug("final ack again");
-		rxrpc_get_call(call);
-		set_bit(RXRPC_CALL_EV_ACK_FINAL, &call->events);
-		rxrpc_queue_call(call);
-		goto free_unlock;
+		case RXRPC_CALL_SUCCEEDED:
+			if (rxrpc_conn_is_service(call->conn))
+				goto dead_call;
+			goto resend_final_ack;
+		}
+
+	case RXRPC_CALL_CLIENT_FINAL_ACK:
+		goto resend_final_ack;
+
 	default:
 		break;
 	}
@@ -550,6 +542,13 @@ static void rxrpc_post_packet_to_call(struct rxrpc_call *call,
 	rxrpc_put_call(call);
 	goto done;
 
+resend_final_ack:
+	_debug("final ack again");
+	rxrpc_get_call(call);
+	set_bit(RXRPC_CALL_EV_ACK_FINAL, &call->events);
+	rxrpc_queue_call(call);
+	goto free_unlock;
+
 dead_call:
 	if (sp->hdr.type != RXRPC_PACKET_TYPE_ABORT) {
 		skb->priority = RX_CALL_DEAD;
@@ -748,6 +747,7 @@ void rxrpc_data_ready(struct sock *sk)
 		if (!call || atomic_read(&call->usage) == 0)
 			goto cant_route_call;
 
+		rxrpc_see_call(call);
 		rxrpc_post_packet_to_call(call, skb);
 		goto out_unlock;
 	}

net/rxrpc/output.c

@@ -115,12 +115,12 @@ static int rxrpc_sendmsg_cmsg(struct msghdr *msg,
  */
 static void rxrpc_send_abort(struct rxrpc_call *call, u32 abort_code)
 {
+	if (call->state >= RXRPC_CALL_COMPLETE)
+		return;
+
 	write_lock_bh(&call->state_lock);
 
-	if (call->state <= RXRPC_CALL_COMPLETE) {
-		call->state = RXRPC_CALL_LOCALLY_ABORTED;
-		call->local_abort = abort_code;
-		set_bit(RXRPC_CALL_EV_ABORT, &call->events);
+	if (__rxrpc_abort_call(call, abort_code, ECONNABORTED)) {
 		del_timer_sync(&call->resend_timer);
 		del_timer_sync(&call->ack_timer);
 		clear_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events);
@@ -207,12 +207,13 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
 			return PTR_ERR(call);
 	}
 
+	rxrpc_see_call(call);
 	_debug("CALL %d USR %lx ST %d on CONN %p",
 	       call->debug_id, call->user_call_ID, call->state, call->conn);
 
 	if (call->state >= RXRPC_CALL_COMPLETE) {
 		/* it's too late for this call */
-		ret = -ECONNRESET;
+		ret = -ESHUTDOWN;
 	} else if (cmd == RXRPC_CMD_SEND_ABORT) {
 		rxrpc_send_abort(call, abort_code);
 		ret = 0;
@@ -238,6 +239,7 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
 
 /**
  * rxrpc_kernel_send_data - Allow a kernel service to send data on a call
+ * @sock: The socket the call is on
  * @call: The call to send data through
  * @msg: The data to send
  * @len: The amount of data to send
@@ -247,8 +249,8 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
  * nor should an address be supplied.  MSG_MORE should be flagged if there's
  * more data to come, otherwise this data will end the transmission phase.
  */
-int rxrpc_kernel_send_data(struct rxrpc_call *call, struct msghdr *msg,
-			   size_t len)
+int rxrpc_kernel_send_data(struct socket *sock, struct rxrpc_call *call,
+			   struct msghdr *msg, size_t len)
 {
 	int ret;
 
@@ -257,7 +259,7 @@ int rxrpc_kernel_send_data(struct rxrpc_call *call, struct msghdr *msg,
 	ASSERTCMP(msg->msg_name, ==, NULL);
 	ASSERTCMP(msg->msg_control, ==, NULL);
 
-	lock_sock(&call->socket->sk);
+	lock_sock(sock->sk);
 
 	_debug("CALL %d USR %lx ST %d on CONN %p",
 	       call->debug_id, call->user_call_ID, call->state, call->conn);
@@ -269,36 +271,36 @@ int rxrpc_kernel_send_data(struct rxrpc_call *call, struct msghdr *msg,
 		   call->state != RXRPC_CALL_SERVER_SEND_REPLY) {
 		ret = -EPROTO; /* request phase complete for this client call */
 	} else {
-		ret = rxrpc_send_data(call->socket, call, msg, len);
+		ret = rxrpc_send_data(rxrpc_sk(sock->sk), call, msg, len);
 	}
 
-	release_sock(&call->socket->sk);
+	release_sock(sock->sk);
 	_leave(" = %d", ret);
 	return ret;
 }
-
 EXPORT_SYMBOL(rxrpc_kernel_send_data);
 
 /**
  * rxrpc_kernel_abort_call - Allow a kernel service to abort a call
+ * @sock: The socket the call is on
  * @call: The call to be aborted
  * @abort_code: The abort code to stick into the ABORT packet
  *
  * Allow a kernel service to abort a call, if it's still in an abortable state.
  */
-void rxrpc_kernel_abort_call(struct rxrpc_call *call, u32 abort_code)
+void rxrpc_kernel_abort_call(struct socket *sock, struct rxrpc_call *call,
+			     u32 abort_code)
 {
 	_enter("{%d},%d", call->debug_id, abort_code);
 
-	lock_sock(&call->socket->sk);
+	lock_sock(sock->sk);
 
 	_debug("CALL %d USR %lx ST %d on CONN %p",
 	       call->debug_id, call->user_call_ID, call->state, call->conn);
 
-	if (call->state < RXRPC_CALL_COMPLETE)
-		rxrpc_send_abort(call, abort_code);
+	rxrpc_send_abort(call, abort_code);
 
-	release_sock(&call->socket->sk);
+	release_sock(sock->sk);
 	_leave("");
 }
 
@@ -640,8 +642,8 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
 
 		/* check for the far side aborting the call or a network error
 		 * occurring */
-		if (call->state > RXRPC_CALL_COMPLETE)
-			goto call_aborted;
+		if (call->state == RXRPC_CALL_COMPLETE)
+			goto call_terminated;
 
 		/* add the packet to the send queue if it's now full */
 		if (sp->remain <= 0 ||
@@ -702,15 +704,9 @@ out:
 	_leave(" = %d", ret);
 	return ret;
 
-call_aborted:
+call_terminated:
 	rxrpc_free_skb(skb);
-	if (call->state == RXRPC_CALL_NETWORK_ERROR)
-		ret = call->error_report < RXRPC_LOCAL_ERROR_OFFSET ?
-			call->error_report :
-			call->error_report - RXRPC_LOCAL_ERROR_OFFSET;
-	else
-		ret = -ECONNABORTED;
-	_leave(" = %d", ret);
+	_leave(" = %d", -call->error);
 	return ret;
 
 maybe_error:

net/rxrpc/peer_event.c

@@ -248,13 +248,21 @@ void rxrpc_peer_error_distributor(struct work_struct *work)
 	struct rxrpc_peer *peer =
 		container_of(work, struct rxrpc_peer, error_distributor);
 	struct rxrpc_call *call;
-	int error_report;
+	enum rxrpc_call_completion compl;
+	bool queue;
+	int error;
 
 	_enter("");
 
-	error_report = READ_ONCE(peer->error_report);
+	error = READ_ONCE(peer->error_report);
+	if (error < RXRPC_LOCAL_ERROR_OFFSET) {
+		compl = RXRPC_CALL_NETWORK_ERROR;
+	} else {
+		compl = RXRPC_CALL_LOCAL_ERROR;
+		error -= RXRPC_LOCAL_ERROR_OFFSET;
+	}
 
-	_debug("ISSUE ERROR %d", error_report);
+	_debug("ISSUE ERROR %s %d", rxrpc_call_completions[compl], error);
 
 	spin_lock_bh(&peer->lock);
 
@@ -262,16 +270,17 @@ void rxrpc_peer_error_distributor(struct work_struct *work)
 		call = hlist_entry(peer->error_targets.first,
 				   struct rxrpc_call, error_link);
 		hlist_del_init(&call->error_link);
+		rxrpc_see_call(call);
 
+		queue = false;
 		write_lock(&call->state_lock);
-		if (call->state != RXRPC_CALL_COMPLETE &&
-		    call->state < RXRPC_CALL_NETWORK_ERROR) {
-			call->error_report = error_report;
-			call->state = RXRPC_CALL_NETWORK_ERROR;
+		if (__rxrpc_set_call_completion(call, compl, 0, error)) {
 			set_bit(RXRPC_CALL_EV_RCVD_ERROR, &call->events);
-			rxrpc_queue_call(call);
+			queue = true;
 		}
 		write_unlock(&call->state_lock);
+		if (queue)
+			rxrpc_queue_call(call);
 	}
 
 	spin_unlock_bh(&peer->lock);

net/rxrpc/peer_object.c

@@ -313,3 +313,18 @@ void __rxrpc_put_peer(struct rxrpc_peer *peer)
 
 	kfree_rcu(peer, rcu);
 }
+
+/**
+ * rxrpc_kernel_get_peer - Get the peer address of a call
+ * @sock: The socket on which the call is in progress.
+ * @call: The call to query
+ * @_srx: Where to place the result
+ *
+ * Get the address of the remote peer in a call.
+ */
+void rxrpc_kernel_get_peer(struct socket *sock, struct rxrpc_call *call,
+			   struct sockaddr_rxrpc *_srx)
+{
+	*_srx = call->peer->srx;
+}
+EXPORT_SYMBOL(rxrpc_kernel_get_peer);

net/rxrpc/proc.c

@@ -22,7 +22,6 @@ static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
 	[RXRPC_CONN_SERVICE]			= "SvSecure",
 	[RXRPC_CONN_REMOTELY_ABORTED]		= "RmtAbort",
 	[RXRPC_CONN_LOCALLY_ABORTED]		= "LocAbort",
-	[RXRPC_CONN_NETWORK_ERROR]		= "NetError",
 };
 
 /*
@@ -94,7 +93,7 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
 		   rxrpc_is_service_call(call) ? "Svc" : "Clt",
 		   atomic_read(&call->usage),
 		   rxrpc_call_states[call->state],
-		   call->remote_abort ?: call->local_abort,
+		   call->abort_code,
 		   call->user_call_ID);
 
 	return 0;

net/rxrpc/recvmsg.c

@@ -115,6 +115,7 @@ int rxrpc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 		sp = rxrpc_skb(skb);
 		call = sp->call;
 		ASSERT(call != NULL);
+		rxrpc_see_call(call);
 
 		_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
 
@@ -294,12 +295,17 @@ receive_non_data_message:
 		ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
 		break;
 	case RXRPC_SKB_MARK_REMOTE_ABORT:
-		abort_code = call->remote_abort;
+		abort_code = call->abort_code;
 		ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
 		break;
 	case RXRPC_SKB_MARK_LOCAL_ABORT:
-		abort_code = call->local_abort;
+		abort_code = call->abort_code;
 		ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
+		if (call->error) {
+			abort_code = call->error;
+			ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
+				       &abort_code);
+		}
 		break;
 	case RXRPC_SKB_MARK_NET_ERROR:
 		_debug("RECV NET ERROR %d", sp->error);
@@ -392,9 +398,8 @@ u32 rxrpc_kernel_get_abort_code(struct sk_buff *skb)
 
 	switch (skb->mark) {
 	case RXRPC_SKB_MARK_REMOTE_ABORT:
-		return sp->call->remote_abort;
 	case RXRPC_SKB_MARK_LOCAL_ABORT:
-		return sp->call->local_abort;
+		return sp->call->abort_code;
 	default:
 		BUG();
 	}

net/rxrpc/skbuff.c

@@ -140,9 +140,7 @@ void rxrpc_packet_destructor(struct sk_buff *skb)
 	_enter("%p{%p}", skb, call);
 
 	if (call) {
-		if (atomic_dec_return(&call->skb_count) < 0)
-			BUG();
-		rxrpc_put_call(call);
+		rxrpc_put_call_for_skb(call, skb);
 		sp->call = NULL;
 	}