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librbd: dynamically disabling exclusive lock might leave lingering request

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Signed-off-by: Jason Dillaman <dillaman@redhat.com>
This commit is contained in:
Jason Dillaman 2016-04-14 08:14:46 -04:00
parent ad489f7b5c
commit 769f99490e
1 changed files with 5 additions and 0 deletions
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5
src/librbd/ImageWatcher.cc
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@ -403,6 +403,11 @@ void ImageWatcher::schedule_request_lock(bool use_timer, int timer_delay) {
void ImageWatcher::notify_request_lock() {
RWLock::RLocker owner_locker(m_image_ctx.owner_lock);
RWLock::RLocker snap_locker(m_image_ctx.snap_lock);
// ExclusiveLock state machine can be dynamically disabled
if (m_image_ctx.exclusive_lock == nullptr) {
return;
}
assert(!m_image_ctx.exclusive_lock->is_lock_owner());
ldout(m_image_ctx.cct, 10) << this << " notify request lock" << dendl;