linux-kernel - [PATCH 1/2] sunrpc: fix pr_notice in svc_tcp

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Message-Id: <20250811-nfsd-testing-v1-1-f9a21bbf238b@kernel.org>
Date: Mon, 11 Aug 2025 10:37:07 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Chuck Lever <chuck.lever@...cle.com>, NeilBrown <neil@...wn.name>, 
 Olga Kornievskaia <okorniev@...hat.com>, Dai Ngo <Dai.Ngo@...cle.com>, 
 Tom Talpey <tom@...pey.com>, Trond Myklebust <trondmy@...nel.org>, 
 Anna Schumaker <anna@...nel.org>
Cc: linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Jeff Layton <jlayton@...nel.org>
Subject: [PATCH 1/2] sunrpc: fix pr_notice in svc_tcp_sendto() to show
 correct length

This pr_notice() is confusing since it only prints xdr->len, which
doesn't include the 4-byte record marker.  That can make it sometimes
look like the socket sent more than was requested if it's short by just
a few bytes.

Add sizeof(marker) to the size and fix the format accordingly.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
 net/sunrpc/svcsock.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 46c156b121db43c1bd1806a08a3a9bf08b332699..22f59289fdcf17137fcac59e13975281ecf3e380 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1266,10 +1266,10 @@ static int svc_tcp_sendto(struct svc_rqst *rqstp)
 	mutex_unlock(&xprt->xpt_mutex);
 	return -ENOTCONN;
 out_close:
-	pr_notice("rpc-srv/tcp: %s: %s %d when sending %d bytes - shutting down socket\n",
+	pr_notice("rpc-srv/tcp: %s: %s %d when sending %zu bytes - shutting down socket\n",
 		  xprt->xpt_server->sv_name,
 		  (err < 0) ? "got error" : "sent",
-		  (err < 0) ? err : sent, xdr->len);
+		  (err < 0) ? err : sent, xdr->len + sizeof(marker));
 	svc_xprt_deferred_close(xprt);
 	mutex_unlock(&xprt->xpt_mutex);
 	return -EAGAIN;

-- 
2.50.1