libcfs_nid2str(peer.nid));
ldlm_lock_cancel(lock);
rc = -ERESTART;
+ } else if (rc == -ENODEV || rc == -ESHUTDOWN ||
+ (rc == -EIO &&
+ req->rq_import->imp_state == LUSTRE_IMP_CLOSED)) {
+ /* Upon umount process the AST fails because cannot be
+ * sent. This shouldn't lead to the client eviction.
+ * -ENODEV error is returned by ptl_send_rpc() for
+ * new request in such import.
+ * -SHUTDOWN is returned by ptlrpc_import_delay_req()
+ * if imp_invalid is set or obd_no_recov.
+ * Meanwhile there is also check for LUSTRE_IMP_CLOSED
+ * in ptlrpc_import_delay_req() as well with -EIO code.
+ * In all such cases errors are ignored.
+ */
+ LDLM_DEBUG(lock, "%s AST can't be sent due to a server"
+ " %s failure or umount process: rc = %d\n",
+ ast_type,
+ req->rq_import->imp_obd->obd_name, rc);
} else {
LDLM_ERROR(lock,
"client (nid %s) %s %s AST (req@%p x%llu status %d rc %d), evict it",