Commit 400cb454 authored by Guoqing Jiang's avatar Guoqing Jiang Committed by Shaohua Li

md-cluster: use FORCEUNLOCK in lockres_free

For dlm_unlock, we need to pass flag to dlm_unlock as the
third parameter instead of set res->flags.

Also, DLM_LKF_FORCEUNLOCK is more suitable for dlm_unlock
since it works even the lock is on waiting or convert queue.
Acked-by: default avatarNeilBrown <neilb@suse.com>
Signed-off-by: default avatarGuoqing Jiang <gqjiang@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent e566aef1
......@@ -194,24 +194,20 @@ static struct dlm_lock_resource *lockres_init(struct mddev *mddev,
static void lockres_free(struct dlm_lock_resource *res)
{
int ret;
int ret = 0;
if (!res)
return;
/* cancel a lock request or a conversion request that is blocked */
res->flags |= DLM_LKF_CANCEL;
retry:
ret = dlm_unlock(res->ls, res->lksb.sb_lkid, 0, &res->lksb, res);
if (unlikely(ret != 0)) {
pr_info("%s: failed to unlock %s return %d\n", __func__, res->name, ret);
/* if a lock conversion is cancelled, then the lock is put
* back to grant queue, need to ensure it is unlocked */
if (ret == -DLM_ECANCEL)
goto retry;
}
res->flags &= ~DLM_LKF_CANCEL;
/*
* use FORCEUNLOCK flag, so we can unlock even the lock is on the
* waiting or convert queue
*/
ret = dlm_unlock(res->ls, res->lksb.sb_lkid, DLM_LKF_FORCEUNLOCK,
&res->lksb, res);
if (unlikely(ret != 0))
pr_err("failed to unlock %s return %d\n", res->name, ret);
else
wait_for_completion(&res->completion);
kfree(res->name);
......
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