[PATCH net v9 02/14] afs: Fix afs to abort the rxrpc call on send error

[David Howells]

Fix afs_send_empty_reply() and afs_send_simple_reply() to always try to
abort the rxrpc call rather than just aborting on -ENOMEM and otherwise
abandoning it.  If the call is already complete due to network failure or a
received abort, this will do nothing.

Also make afs_make_call() always abort on send error; again, it does
nothing if the rxrpc call is already dead.

Fixes: 08e0e7c82eea ("[AF_RXRPC]: Make the in-kernel AFS filesystem use AF_RXRPC.")
Link: https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260824091645.415423-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells at redhat.com>
cc: Marc Dionne <marc.dionne at auristor.com>
cc: Eric Dumazet <edumazet at google.com>
cc: "David S. Miller" <davem at davemloft.net>
cc: Jakub Kicinski <kuba at kernel.org>
cc: Paolo Abeni <pabeni at redhat.com>
cc: Simon Horman <horms at kernel.org>
cc: linux-afs at lists.infradead.org
cc: stable at vger.kernel.org
---
 fs/afs/rxrpc.c               | 35 +++++++++++------------------------
 include/trace/events/rxrpc.h |  2 +-
 2 files changed, 12 insertions(+), 25 deletions(-)

diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index a80b043d36be..04756d8744e2 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -449,10 +449,8 @@ void afs_make_call(struct afs_call *call, gfp_t gfp)
 	return;
 
 error_do_abort:
-	if (ret != -ECONNABORTED)
-		rxrpc_kernel_abort_call(call->net->socket, rxcall,
-					RX_USER_ABORT, ret,
-					afs_abort_send_data_error);
+	rxrpc_kernel_abort_call(call->net->socket, rxcall,
+				RX_USER_ABORT, ret, afs_abort_send_data_error);
 	if (call->async) {
 		afs_see_call(call, afs_call_trace_async_abort);
 		return;
@@ -865,6 +863,7 @@ void afs_send_empty_reply(struct afs_call *call)
 {
 	struct afs_net *net = call->net;
 	struct msghdr msg;
+	int ret;
 
 	_enter("");
 
@@ -877,22 +876,13 @@ void afs_send_empty_reply(struct afs_call *call)
 	msg.msg_controllen	= 0;
 	msg.msg_flags		= 0;
 
-	switch (rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, 0,
-				       afs_notify_end_reply_tx)) {
-	case 0:
-		_leave(" [replied]");
+	ret = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, 0,
+				     afs_notify_end_reply_tx);
+	if (ret >= 0)
 		return;
 
-	case -ENOMEM:
-		_debug("oom");
-		rxrpc_kernel_abort_call(net->socket, call->rxcall,
-					RXGEN_SS_MARSHAL, -ENOMEM,
-					afs_abort_oom);
-		fallthrough;
-	default:
-		_leave(" [error]");
-		return;
-	}
+	rxrpc_kernel_abort_call(net->socket, call->rxcall,
+				RXGEN_SS_MARSHAL, ret, afs_abort_send_error);
 }
 
 /*
@@ -930,12 +920,9 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 		return;
 	}
 
-	if (n == -ENOMEM) {
-		_debug("oom");
-		rxrpc_kernel_abort_call(net->socket, call->rxcall,
-					RXGEN_SS_MARSHAL, -ENOMEM,
-					afs_abort_oom);
-	}
+
+	rxrpc_kernel_abort_call(net->socket, call->rxcall,
+				RXGEN_SS_MARSHAL, n, afs_abort_send_error);
 	_leave(" [error]");
 }
 
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 704a10de6670..554dfb777b93 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -20,10 +20,10 @@
 	/* AFS errors */						\
 	EM(afs_abort_general_error,		"afs-error")		\
 	EM(afs_abort_interrupted,		"afs-intr")		\
-	EM(afs_abort_oom,			"afs-oom")		\
 	EM(afs_abort_op_not_supported,		"afs-op-notsupp")	\
 	EM(afs_abort_probeuuid_negative,	"afs-probeuuid-neg")	\
 	EM(afs_abort_send_data_error,		"afs-send-data")	\
+	EM(afs_abort_send_error,		"afs-send-error")	\
 	EM(afs_abort_unmarshal_error,		"afs-unmarshal")	\
 	EM(afs_abort_unsupported_sec_class,	"afs-unsup-sec-class")	\
 	/* rxperf errors */						\