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rbd: ignore unlock errors 

Currently the lock_state is set to UNLOCKED (preventing further I/O),
but RELEASED_LOCK notification isn't sent.  Be consistent with userspace
and treat ceph_cls_unlock() errors as the image is unlocked.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
This commit is contained in:
Ilya Dryomov 2017-04-13 12:17:38 +02:00
parent 5769ed0cb1
commit bbead745d9
1 changed files with 14 additions and 18 deletions
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32
drivers/block/rbd.c
View File

@ -3097,7 +3097,7 @@ static int rbd_lock(struct rbd_device *rbd_dev)
/*
* lock_rwsem must be held for write
*/
static int rbd_unlock(struct rbd_device *rbd_dev)
static void rbd_unlock(struct rbd_device *rbd_dev)
{
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
char cookie[32];
@ -3105,19 +3105,16 @@ static int rbd_unlock(struct rbd_device *rbd_dev)
WARN_ON(!__rbd_is_lock_owner(rbd_dev));
rbd_dev->lock_state = RBD_LOCK_STATE_UNLOCKED;
format_lock_cookie(rbd_dev, cookie);
ret = ceph_cls_unlock(osdc, &rbd_dev->header_oid, &rbd_dev->header_oloc,
RBD_LOCK_NAME, cookie);
if (ret && ret != -ENOENT) {
rbd_warn(rbd_dev, "cls_unlock failed: %d", ret);
return ret;
}
if (ret && ret != -ENOENT)
rbd_warn(rbd_dev, "failed to unlock: %d", ret);
/* treat errors as the image is unlocked */
rbd_dev->lock_state = RBD_LOCK_STATE_UNLOCKED;
rbd_set_owner_cid(rbd_dev, &rbd_empty_cid);
queue_work(rbd_dev->task_wq, &rbd_dev->released_lock_work);
return 0;
}
static int __rbd_notify_op_lock(struct rbd_device *rbd_dev,
@ -3490,16 +3487,15 @@ static bool rbd_release_lock(struct rbd_device *rbd_dev)
if (rbd_dev->lock_state != RBD_LOCK_STATE_RELEASING)
return false;
if (!rbd_unlock(rbd_dev))
/*
* Give others a chance to grab the lock - we would re-acquire
* almost immediately if we got new IO during ceph_osdc_sync()
* otherwise. We need to ack our own notifications, so this
* lock_dwork will be requeued from rbd_wait_state_locked()
* after wake_requests() in rbd_handle_released_lock().
*/
cancel_delayed_work(&rbd_dev->lock_dwork);
rbd_unlock(rbd_dev);
/*
* Give others a chance to grab the lock - we would re-acquire
* almost immediately if we got new IO during ceph_osdc_sync()
* otherwise. We need to ack our own notifications, so this
* lock_dwork will be requeued from rbd_wait_state_locked()
* after wake_requests() in rbd_handle_released_lock().
*/
cancel_delayed_work(&rbd_dev->lock_dwork);
return true;
}