commit: 666b3d803a511fbc9bc5e5ea8ce66010cf03ea13
From: Trond Myklebust <[email protected]>
Date: Tue, 19 Feb 2013 12:04:42 -0500
Subject: NLM: Ensure that we resend all pending blocking locks after a
 reclaim

Currently, nlmclnt_lock will break out of the for(;;) loop when
the reclaimer wakes up the blocking lock thread by setting
nlm_lck_denied_grace_period. This causes the lock request to fail
with an ENOLCK error.
The intention was always to ensure that we resend the lock request
after the grace period has expired.

Reported-by: Wangyuan Zhang <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>
Cc: [email protected]
---
 fs/lockd/clntproc.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 54f9e6c..52e5120 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -550,6 +550,9 @@ 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;
        }
-- 
1.7.10.4
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