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net/rds: rds_sendmsg should not discard payload_len

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[ Upstream commit da29e453dcb3aa7cabead7915f5f945d0add3a52 ]

Commit 3db6e0d172 ("rds: use RCU to synchronize work-enqueue with
connection teardown") modifies rds_sendmsg to avoid enqueueing work
while a tear down is in progress. However, it also changed the return
value of rds_sendmsg to that of rds_send_xmit instead of the
payload_len. This means the user may incorrectly receive errno values
when it should have simply received a payload of 0 while the peer
attempts a reconnections.  So this patch corrects the teardown handling
code to only use the out error path in that case, thus restoring the
original payload_len return value.

Fixes: 3db6e0d172 ("rds: use RCU to synchronize work-enqueue with connection teardown")
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260213035409.1963391-1-achender@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Ulrich Hecht <uli@kernel.org>
This commit is contained in:
Allison Henderson
2026-02-12 20:54:09 -07:00
committed by Ulrich Hecht
parent 311d876e64
commit aaa978ac1c
1 changed files with 4 additions and 2 deletions
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6
net/rds/send.c
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@ -1368,9 +1368,11 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
else
queue_delayed_work(rds_wq, &cpath->cp_send_w, 1);
rcu_read_unlock();
if (ret)
goto out;
}
if (ret)
goto out;
rds_message_put(rm);
for (ind = 0; ind < vct.indx; ind++)