]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
nbd: do not allow two clients at the same time
authorPavel Machek <pavel@suse.cz>
Thu, 15 Jan 2009 21:51:03 +0000 (13:51 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 16 Jan 2009 00:39:38 +0000 (16:39 -0800)
commitc91192d66d6cea7878b8542c9d9f1873971aba92
tree954adf09a2d6f4028aa8c3a842aa07235e3d4be5
parent1bcbf31337391a2f54ef6c1e8871c2de5944a7dc
nbd: do not allow two clients at the same time

Two nbd-clients at same time are bad idea, and cause WARN_ON from nbd in
2.6.28-rc7 from sysfs_add_one.  This simply prevents that from happening.

To reproduce:

 cat /dev/zero | head -c 10000000 > /tmp/delme.fstest.fs
 nbd-server 9100 -l /anyone.can.connect > /tmp/delme.fstest.fs &
 sleep 1
 nbd-client localhost 9100 /dev/nd0 &
 nbd-client localhost 9100 /dev/nd0 &

Signed-off-by: Pavel Machek <pavel@suse.cz>
Acked-by: Paul Clements <paul.clements@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/block/nbd.c