提交 2cd98885 编写于 作者: M Mark Fasheh

ocfs2: test and set teardown flag early in user_dlm_destroy_lock()

Signed-off-by: NMark Fasheh <mark.fasheh@oracle.com>
上级 f43e6918
......@@ -237,9 +237,13 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
mlog(ML_ERROR, "Dlm returns status %d\n", status);
spin_lock(&lockres->l_lock);
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN)
/* The teardown flag gets set early during the unlock process,
* so test the cancel flag to make sure that this ast isn't
* for a concurrent cancel. */
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN
&& !(lockres->l_flags & USER_LOCK_IN_CANCEL)) {
lockres->l_level = LKM_IVMODE;
else if (status == DLM_CANCELGRANT) {
} else if (status == DLM_CANCELGRANT) {
mlog(0, "Lock %s, cancel fails, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
/* We tried to cancel a convert request, but it was
......@@ -608,6 +612,14 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
mlog(0, "asked to destroy %s\n", lockres->l_name);
spin_lock(&lockres->l_lock);
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
mlog(0, "Lock is already torn down\n");
spin_unlock(&lockres->l_lock);
return 0;
}
lockres->l_flags |= USER_LOCK_IN_TEARDOWN;
while (lockres->l_flags & USER_LOCK_BUSY) {
spin_unlock(&lockres->l_lock);
......@@ -633,7 +645,6 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
lockres->l_flags &= ~USER_LOCK_ATTACHED;
lockres->l_flags |= USER_LOCK_BUSY;
lockres->l_flags |= USER_LOCK_IN_TEARDOWN;
spin_unlock(&lockres->l_lock);
mlog(0, "unlocking lockres %s\n", lockres->l_name);
......
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