linux-kernel - [PATCH 004 of 14] knfsd: SUNRPC: Don't set msg_name and msg_namelen when calling sock

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Date:	Wed, 13 Dec 2006 10:58:55 +1100
From:	NeilBrown <neilb@...e.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH 004 of 14] knfsd: SUNRPC: Don't set msg_name and msg_namelen when calling sock_recvmsg


From: Chuck Lever <chuck.lever@...cle.com>
Clean-up: msg_name and msg_namelen are not used by sock_recvmsg, so
don't bother to set them in svc_recvfrom.

Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Signed-off-by: Neil Brown <neilb@...e.de>

### Diffstat output
 ./net/sunrpc/svcsock.c |   23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff .prev/net/sunrpc/svcsock.c ./net/sunrpc/svcsock.c
--- .prev/net/sunrpc/svcsock.c	2006-12-13 10:29:13.000000000 +1100
+++ ./net/sunrpc/svcsock.c	2006-12-13 10:29:15.000000000 +1100
@@ -560,21 +560,14 @@ svc_recv_available(struct svc_sock *svsk
 static int
 svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, int nr, int buflen)
 {
-	struct msghdr	msg;
-	struct socket	*sock;
-	int		len, alen;
-
-	rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
-	sock = rqstp->rq_sock->sk_sock;
-
-	msg.msg_name    = &rqstp->rq_addr;
-	msg.msg_namelen = sizeof(rqstp->rq_addr);
-	msg.msg_control = NULL;
-	msg.msg_controllen = 0;
-
-	msg.msg_flags	= MSG_DONTWAIT;
+	struct svc_sock	*svsk = rqstp->rq_sock;
+	struct msghdr msg = {
+		.msg_flags	= MSG_DONTWAIT,
+	};
+	int len;
 
-	len = kernel_recvmsg(sock, &msg, iov, nr, buflen, MSG_DONTWAIT);
+	len = kernel_recvmsg(svsk->sk_sock, &msg, iov, nr, buflen,
+				msg.msg_flags);
 
 	/* sock_recvmsg doesn't fill in the name/namelen, so we must..
 	 */
@@ -582,7 +575,7 @@ svc_recvfrom(struct svc_rqst *rqstp, str
 	rqstp->rq_addrlen = svsk->sk_remotelen;
 
 	dprintk("svc: socket %p recvfrom(%p, %Zu) = %d\n",
-		rqstp->rq_sock, iov[0].iov_base, iov[0].iov_len, len);
+		svsk, iov[0].iov_base, iov[0].iov_len, len);
 
 	return len;
 }
-
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