diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-21 18:01:06 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-05-13 15:02:22 +0100 |
| commit | 7d803dc3d974ba8e9e7781b30079d8dc7640e1f7 (patch) | |
| tree | 7614a3aa91278de8b5ad625319f86ae226b9bacb | |
| parent | fcf565be6168313624ac7c0d34d64c92fc967a81 (diff) | |
| download | linux-rt-7d803dc3d974ba8e9e7781b30079d8dc7640e1f7.tar.gz | |
LOCKD: Ensure that nlmclnt_block resets block->b_status after a server reboot
commit 1dfd89af8697a299e7982ae740d4695ecd917eef upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | fs/lockd/clntlock.c | 3 | ||||
| -rw-r--r-- | fs/lockd/clntproc.c | 3 |
2 files changed, 3 insertions, 3 deletions
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c index 8d4ea8351e3d..de889223174a 100644 --- a/fs/lockd/clntlock.c +++ b/fs/lockd/clntlock.c @@ -141,6 +141,9 @@ 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; } diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index a3a09877ea62..8392cb85bd54 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -551,9 +551,6 @@ again: status = nlmclnt_block(block, req, NLMCLNT_POLL_TIMEOUT); if (status < 0) break; - /* Resend the blocking lock request after a server reboot */ - if (resp->status == nlm_lck_denied_grace_period) - continue; if (resp->status != nlm_lck_blocked) break; } |