[PATCH 6.6.y] afs: Fix afs to abort the rxrpc call on send error

[Sasha Levin]

From: David Howells <dhowells at redhat.com>

[ Upstream commit 3e6af08a571fe2943a006acf3e890f36322602bc ]

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
Link: https://patch.msgid.link/20261006133011.531806-6-dhowells@redhat.com
Signed-off-by: Paolo Abeni <pabeni at redhat.com>
[ sashal: adapted rxrpc_kernel_send_data() calls to retain the explicit length argument ]
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 fs/afs/rxrpc.c               | 49 +++++++++++++-----------------------
 include/trace/events/rxrpc.h |  2 +-
 2 files changed, 18 insertions(+), 33 deletions(-)

diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 523272b86ad46..02bb3ad472eec 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -442,10 +442,8 @@ void afs_make_call(struct afs_addr_cursor *ac, 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;
@@ -872,6 +870,7 @@ void afs_send_empty_reply(struct afs_call *call)
 {
 	struct afs_net *net = call->net;
 	struct msghdr msg;
+	int ret;
 
 	_enter("");
 
@@ -884,21 +883,13 @@ 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]");
-		return;
-
-	case -ENOMEM:
-		_debug("oom");
+	ret = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, 0,
+				     afs_notify_end_reply_tx);
+	if (ret < 0) {
 		rxrpc_kernel_abort_call(net->socket, call->rxcall,
-					RXGEN_SS_MARSHAL, -ENOMEM,
-					afs_abort_oom);
-		fallthrough;
-	default:
-		_leave(" [error]");
-		return;
+					RXGEN_SS_MARSHAL, ret,
+					afs_abort_send_error);
+		afs_set_call_complete(call, ret, RXGEN_SS_MARSHAL);
 	}
 }
 
@@ -910,7 +901,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 	struct afs_net *net = call->net;
 	struct msghdr msg;
 	struct kvec iov[1];
-	int n;
+	int ret;
 
 	_enter("");
 
@@ -925,21 +916,15 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 	msg.msg_controllen	= 0;
 	msg.msg_flags		= 0;
 
-	n = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, len,
-				   afs_notify_end_reply_tx);
-	if (n >= 0) {
-		/* Success */
-		_leave(" [replied]");
-		return;
-	}
-
-	if (n == -ENOMEM) {
-		_debug("oom");
+	ret = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, len,
+				     afs_notify_end_reply_tx);
+	if (ret < 0) {
 		rxrpc_kernel_abort_call(net->socket, call->rxcall,
-					RXGEN_SS_MARSHAL, -ENOMEM,
-					afs_abort_oom);
+					RXGEN_SS_MARSHAL, ret,
+					afs_abort_send_error);
+		afs_set_call_complete(call, ret, RXGEN_SS_MARSHAL);
+		_leave(" [error]");
 	}
-	_leave(" [error]");
 }
 
 /*
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 8cbec303cb505..1dbeabf143347 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")	\
 	/* rxperf errors */						\
 	EM(rxperf_abort_general_error,		"rxperf-error")		\
-- 
2.53.0