- if (rc < 0)
- GOTO(out, rc); /* lock was destroyed */
- if (rc == 2)
- goto grant;
-
- rc2 = ldlm_extent_compat_queue(&res->lr_waiting, lock, flags, err,
- &rpc_list, &contended_locks);
- if (rc2 < 0)
- GOTO(out, rc = rc2); /* lock was destroyed */
-
- if (rc + rc2 == 2) {
- grant:
- ldlm_extent_policy(res, lock, flags);
- ldlm_resource_unlink_lock(lock);
- ldlm_grant_lock(lock, NULL);
- } else {
- /* If either of the compat_queue()s returned failure, then we
- * have ASTs to send and must go onto the waiting list.
- *
- * bug 2322: we used to unlink and re-add here, which was a
- * terrible folly -- if we goto restart, we could get
- * re-ordered! Causes deadlock, because ASTs aren't sent! */
- if (list_empty(&lock->l_res_link))
- ldlm_resource_add_lock(res, &res->lr_waiting, lock);
- unlock_res(res);
- rc = ldlm_run_ast_work(ldlm_res_to_ns(res), &rpc_list,
- LDLM_WORK_BL_AST);
-
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_OST_FAIL_RACE) &&
- !ns_is_client(ldlm_res_to_ns(res)))
- class_fail_export(lock->l_export);
-
- lock_res(res);
- if (rc == -ERESTART) {
- /* 15715: The lock was granted and destroyed after
- * resource lock was dropped. Interval node was freed
- * in ldlm_lock_destroy. Anyway, this always happens
- * when a client is being evicted. So it would be
- * ok to return an error. -jay */
- if (ldlm_is_destroyed(lock)) {
- *err = -EAGAIN;
- GOTO(out, rc = -EAGAIN);
- }
-
- /* lock was granted while resource was unlocked. */
- if (lock->l_granted_mode == lock->l_req_mode) {
- /* bug 11300: if the lock has been granted,
- * break earlier because otherwise, we will go
- * to restart and ldlm_resource_unlink will be
- * called and it causes the interval node to be
- * freed. Then we will fail at
- * ldlm_extent_add_lock() */
- *flags &= ~LDLM_FL_BLOCKED_MASK;
- GOTO(out, rc = 0);
- }