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mds: only client hold xlock in xlockdone can change lock state

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If we are in xlockdone, only the client holding that xlock can adjus the
lock state (e.g., relock).  Other clients have to wait until the xlock
cycle unwinds completely.

Fixes: #1417
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2011-08-19 16:15:06 -07:00
parent 1dfdc730f7
commit a35ac29bef
1 changed files with 2 additions and 1 deletions
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3
src/mds/Locker.cc
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@ -1306,7 +1306,8 @@ bool Locker::xlock_start(SimpleLock *lock, MDRequest *mut)
return true;
}
if (!lock->is_stable() && lock->get_state() != LOCK_XLOCKDONE)
if (!lock->is_stable() && !(lock->get_state() == LOCK_XLOCKDONE &&
lock->get_xlock_by_client() == client))
break;
if (lock->get_state() == LOCK_LOCK || lock->get_state() == LOCK_XLOCKDONE)