linux-kernel - [PATCH 002 of 4] knfsd: Check return value of lockd_up in write

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Date:	Fri, 28 Jul 2006 15:09:51 +1000
From:	NeilBrown <neilb@...e.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH 002 of 4] knfsd: Check return value of lockd_up in write_ports


We should be checking the return value of lockd_up when
adding a new socket to nfsd.
So move the lockd_up before the svc_addsock and check
the return value.
The move is because lockd_down is easy, but there is no easy
way to remove a recently added socket.

Cc: "J. Bruce Fields" <bfields@...ldses.org>

Signed-off-by: Neil Brown <neilb@...e.de>

### Diffstat output
 ./fs/nfsd/nfsctl.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff .prev/fs/nfsd/nfsctl.c ./fs/nfsd/nfsctl.c
--- .prev/fs/nfsd/nfsctl.c	2006-07-28 11:34:33.000000000 +1000
+++ ./fs/nfsd/nfsctl.c	2006-07-28 12:07:35.000000000 +1000
@@ -454,12 +454,15 @@ static ssize_t write_ports(struct file *
 		err = nfsd_create_serv();
 		if (!err) {
 			int proto = 0;
-			err = svc_addsock(nfsd_serv, fd, buf, &proto);
+			err = lockd_up(proto);
+			if (!err) {
+				err = svc_addsock(nfsd_serv, fd, buf, &proto);
+				if (err)
+					lockd_down();
+			}
 			/* Decrease the count, but don't shutdown the
 			 * the service
 			 */
-			if (err >= 0)
-				lockd_up(proto);
 			nfsd_serv->sv_nrthreads--;
 		}
 		return err;
-
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