diff options
| author |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-21 18:01:06 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-21 18:08:42 -0400 |
| commit | 1dfd89af8697a299e7982ae740d4695ecd917eef (patch) | |
| tree | 5aa23c37416e71ef28c593bcf83bdaca9fdd0b7a /fs/lockd/clntlock.c | |
| parent | NFSv4: Ensure the LOCK call cannot use the delegation stateid (diff) | |
| download | linux-dev-1dfd89af8697a299e7982ae740d4695ecd917eef.tar.xz linux-dev-1dfd89af8697a299e7982ae740d4695ecd917eef.zip | |
LOCKD: Ensure that nlmclnt_block resets block->b_status after a server reboot
After a server reboot, the reclaimer thread will recover all the existing
locks. For locks that are blocked, however, it will change the value
of block->b_status to nlm_lck_denied_grace_period in order to signal that
they need to wake up and resend the original blocking lock request.
Due to a bug, however, the block->b_status never gets reset after the
blocked locks have been woken up, and so the process goes into an
infinite loop of resends until the blocked lock is satisfied.
Reported-by: Marc Eshel <eshel@us.ibm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/lockd/clntlock.c')
| -rw-r--r-- | fs/lockd/clntlock.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c index 0796c45d0d4d..01bfe7662751 100644 --- a/fs/lockd/clntlock.c +++ b/fs/lockd/clntlock.c @@ -144,6 +144,9 @@ int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout) timeout); if (ret < 0) return -ERESTARTSYS; + /* Reset the lock status after a server reboot so we resend */ + if (block->b_status == nlm_lck_denied_grace_period) + block->b_status = nlm_lck_blocked; req->a_res.status = block->b_status; return 0; } |