[PATCH 5.15.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 abort calls to use string reason codes instead of trace enums ]
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 fs/afs/rxrpc.c | 34 ++++++++++++----------------------
 1 file changed, 12 insertions(+), 22 deletions(-)

diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 624ca9a2bc8a1..45073a7369122 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -400,10 +400,9 @@ 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, "KSD");
-	} else {
+	rxrpc_kernel_abort_call(call->net->socket, rxcall,
+				RX_USER_ABORT, ret, "KSD");
+	if (ret == -ECONNABORTED) {
 		len = 0;
 		iov_iter_kvec(&msg.msg_iter, ITER_DEST, NULL, 0, 0);
 		rxrpc_kernel_recv_data(call->net->socket, rxcall,
@@ -821,6 +820,7 @@ void afs_send_empty_reply(struct afs_call *call)
 {
 	struct afs_net *net = call->net;
 	struct msghdr msg;
+	int ret;
 
 	_enter("");
 
@@ -833,20 +833,12 @@ 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, "KOO");
-		fallthrough;
-	default:
-		_leave(" [error]");
-		return;
+					RXGEN_SS_MARSHAL, ret, "KSE");
+		afs_set_call_complete(call, ret, RXGEN_SS_MARSHAL);
 	}
 }
 
@@ -881,11 +873,9 @@ 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, "KOO");
-	}
+	rxrpc_kernel_abort_call(net->socket, call->rxcall,
+				RXGEN_SS_MARSHAL, n, "KSE");
+	afs_set_call_complete(call, n, RXGEN_SS_MARSHAL);
 	_leave(" [error]");
 }
 
-- 
2.53.0