1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
5 * Author: Mike Shaver <shaver@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #define DEBUG_SUBSYSTEM S_RPC
25 # include <liblustre.h>
28 #include <linux/obd_support.h>
29 #include <linux/lustre_ha.h>
30 #include <linux/lustre_net.h>
31 #include <linux/lustre_import.h>
32 #include <linux/lustre_export.h>
33 #include <linux/obd.h>
34 #include <linux/obd_class.h>
35 #include <linux/lustre_sec.h>
37 #include "ptlrpc_internal.h"
39 struct ptlrpc_connect_async_args {
40 __u64 pcaa_peer_committed;
41 int pcaa_initial_connect;
44 /* A CLOSED import should remain so. */
45 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
47 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
48 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
49 imp, imp->imp_target_uuid.uuid, \
50 ptlrpc_import_state_name(imp->imp_state), \
51 ptlrpc_import_state_name(state)); \
52 imp->imp_state = state; \
56 #define IMPORT_SET_STATE(imp, state) \
58 unsigned long flags; \
60 spin_lock_irqsave(&imp->imp_lock, flags); \
61 IMPORT_SET_STATE_NOLOCK(imp, state); \
62 spin_unlock_irqrestore(&imp->imp_lock, flags); \
66 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
68 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
70 /* Only this function is allowed to change the import state when it is
71 * CLOSED. I would rather refcount the import and free it after
72 * disconnection like we do with exports. To do that, the client_obd
73 * will need to save the peer info somewhere other than in the import,
75 int ptlrpc_init_import(struct obd_import *imp)
79 spin_lock_irqsave(&imp->imp_lock, flags);
81 imp->imp_generation++;
82 imp->imp_state = LUSTRE_IMP_NEW;
84 spin_unlock_irqrestore(&imp->imp_lock, flags);
89 /* Returns true if import was FULL, false if import was already not
92 int ptlrpc_set_import_discon(struct obd_import *imp)
97 spin_lock_irqsave(&imp->imp_lock, flags);
99 if (imp->imp_state == LUSTRE_IMP_FULL) {
100 CWARN("%s: connection lost to %s@%s\n",
101 imp->imp_obd->obd_name,
102 imp->imp_target_uuid.uuid,
103 imp->imp_connection->c_remote_uuid.uuid);
104 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
105 spin_unlock_irqrestore(&imp->imp_lock, flags);
106 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
109 spin_unlock_irqrestore(&imp->imp_lock, flags);
110 CDEBUG(D_HA, "%p %s: import already not connected: %s\n",
111 imp,imp->imp_client->cli_name,
112 ptlrpc_import_state_name(imp->imp_state));
119 * This acts as a barrier; all existing requests are rejected, and
120 * no new requests will be accepted until the import is valid again.
122 void ptlrpc_deactivate_import(struct obd_import *imp)
127 spin_lock_irqsave(&imp->imp_lock, flags);
128 CDEBUG(D_HA, "setting import %s INVALID\n",
129 imp->imp_target_uuid.uuid);
130 imp->imp_invalid = 1;
131 imp->imp_generation++;
132 spin_unlock_irqrestore(&imp->imp_lock, flags);
134 ptlrpc_abort_inflight(imp);
135 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
139 * This function will invalidate the import, if necessary, then block
140 * for all the RPC completions, and finally notify the obd to
141 * invalidate its state (ie cancel locks, clear pending requests,
144 * in_rpc: true if this is called while processing an rpc, like
145 * CONNECT. It will allow for one RPC to be inflight while
146 * waiting for requests to complete. Ugly, yes, but I don't see an
147 * cleaner way right now.
149 void ptlrpc_invalidate_import(struct obd_import *imp, int in_rpc)
151 struct l_wait_info lwi;
152 unsigned long timeout;
156 if (!imp->imp_invalid)
157 ptlrpc_deactivate_import(imp);
159 LASSERT(imp->imp_invalid);
164 /* wait for all requests to error out and call completion
166 if (imp->imp_server_timeout)
167 timeout = obd_timeout / 2;
169 timeout = obd_timeout;
170 timeout = MAX(timeout * HZ, 1);
171 lwi = LWI_TIMEOUT_INTR(timeout, NULL, NULL, NULL);
172 rc = l_wait_event(imp->imp_recovery_waitq,
173 (atomic_read(&imp->imp_inflight) == inflight),
177 CERROR("%s: rc = %d waiting for callback (%d != %d)\n",
178 imp->imp_target_uuid.uuid, rc,
179 atomic_read(&imp->imp_inflight), !!in_rpc);
181 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
184 void ptlrpc_activate_import(struct obd_import *imp)
186 struct obd_device *obd = imp->imp_obd;
189 spin_lock_irqsave(&imp->imp_lock, flags);
190 imp->imp_invalid = 0;
191 spin_unlock_irqrestore(&imp->imp_lock, flags);
193 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
196 void ptlrpc_fail_import(struct obd_import *imp, int generation)
200 LASSERT (!imp->imp_dlm_fake);
202 if (ptlrpc_set_import_discon(imp)) {
205 if (!imp->imp_replayable) {
206 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
207 "auto-deactivating\n",
208 imp->imp_target_uuid.uuid,
209 imp->imp_connection->c_remote_uuid.uuid,
210 imp->imp_obd->obd_name);
211 ptlrpc_deactivate_import(imp);
214 CDEBUG(D_HA, "%s: waking up pinger\n",
215 imp->imp_target_uuid.uuid);
217 spin_lock_irqsave(&imp->imp_lock, flags);
218 imp->imp_force_verify = 1;
219 spin_unlock_irqrestore(&imp->imp_lock, flags);
221 ptlrpc_pinger_wake_up();
226 #define ATTEMPT_TOO_SOON(last) \
227 ((last) && ((long)(jiffies - (last)) <= (long)(obd_timeout * 2 * HZ)))
229 static int import_select_connection(struct obd_import *imp)
231 struct obd_import_conn *imp_conn, *tmp;
232 struct obd_export *dlmexp;
236 spin_lock(&imp->imp_lock);
238 if (list_empty(&imp->imp_conn_list)) {
239 CERROR("no available connections on imp %p@%s\n",
240 imp, imp->imp_obd->obd_name);
241 spin_unlock(&imp->imp_lock);
245 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
246 if (!ATTEMPT_TOO_SOON(imp_conn->oic_last_attempt)) {
252 /* if not found, simply choose the current one */
254 CWARN("obd %s imp 0x%p: all connections have been "
255 "tried recently\n", imp->imp_obd->obd_name, imp);
256 LASSERT(imp->imp_conn_current);
257 imp_conn = imp->imp_conn_current;
259 LASSERT(imp_conn->oic_conn);
261 imp_conn->oic_last_attempt = jiffies;
263 /* move the items ahead of the selected one to list tail */
265 tmp= list_entry(imp->imp_conn_list.next,
266 struct obd_import_conn, oic_item);
269 list_del(&tmp->oic_item);
270 list_add_tail(&tmp->oic_item, &imp->imp_conn_list);
273 /* switch connection if we chose a new one */
274 if (imp->imp_connection != imp_conn->oic_conn) {
275 if (imp->imp_connection) {
276 ptlrpcs_sec_invalidate_cache(imp->imp_sec);
277 ptlrpc_put_connection(imp->imp_connection);
279 imp->imp_connection =
280 ptlrpc_connection_addref(imp_conn->oic_conn);
283 dlmexp = class_conn2export(&imp->imp_dlm_handle);
284 LASSERT(dlmexp != NULL);
285 if (dlmexp->exp_connection)
286 ptlrpc_put_connection(imp->imp_connection);
287 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
288 class_export_put(dlmexp);
290 imp->imp_conn_current = imp_conn;
291 CWARN("obd %s imp 0x%p: select conn %s\n",
292 imp->imp_obd->obd_name, imp,
293 imp_conn->oic_uuid.uuid);
294 spin_unlock(&imp->imp_lock);
301 int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid)
303 struct obd_device *obd = imp->imp_obd;
304 int initial_connect = 0;
306 __u64 committed_before_reconnect = 0;
307 struct ptlrpc_request *request;
308 int size[] = {sizeof(imp->imp_target_uuid),
309 sizeof(obd->obd_uuid),
310 sizeof(imp->imp_dlm_handle),
311 sizeof(unsigned long),
313 char *tmp[] = {imp->imp_target_uuid.uuid,
315 (char *)&imp->imp_dlm_handle,
316 (char *)&imp->imp_connect_flags, /* XXX: make this portable! */
317 (char*) &obd->u.cli.cl_nllu};
318 struct ptlrpc_connect_async_args *aa;
321 spin_lock_irqsave(&imp->imp_lock, flags);
322 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
323 spin_unlock_irqrestore(&imp->imp_lock, flags);
324 CERROR("can't connect to a closed import\n");
326 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
327 spin_unlock_irqrestore(&imp->imp_lock, flags);
328 CERROR("already connected\n");
330 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
331 spin_unlock_irqrestore(&imp->imp_lock, flags);
332 CERROR("already connecting\n");
336 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
338 imp->imp_resend_replay = 0;
340 if (imp->imp_remote_handle.cookie == 0) {
343 committed_before_reconnect = imp->imp_peer_committed_transno;;
348 spin_unlock_irqrestore(&imp->imp_lock, flags);
351 struct obd_uuid uuid;
353 obd_str2uuid(&uuid, new_uuid);
355 rc = import_set_conn_priority(imp, &uuid);
359 rc = import_select_connection(imp);
363 LASSERT(imp->imp_sec);
365 request = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION,
366 imp->imp_connect_op, 5, size, tmp);
368 GOTO(out, rc = -ENOMEM);
371 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
373 if (obd->u.cli.cl_async) {
374 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_ASYNC);
377 request->rq_send_state = LUSTRE_IMP_CONNECTING;
378 request->rq_replen = lustre_msg_size(0, NULL);
379 request->rq_interpret_reply = ptlrpc_connect_interpret;
381 LASSERT (sizeof (*aa) <= sizeof (request->rq_async_args));
382 aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
383 memset(aa, 0, sizeof *aa);
385 aa->pcaa_peer_committed = committed_before_reconnect;
386 aa->pcaa_initial_connect = initial_connect;
388 if (aa->pcaa_initial_connect) {
389 lustre_msg_add_op_flags(request->rq_reqmsg,
390 MSG_CONNECT_INITIAL);
391 imp->imp_replayable = 1;
394 ptlrpcd_add_req(request);
396 imp->imp_connect_start = jiffies;
399 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
405 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
408 struct ptlrpc_connect_async_args *aa = data;
409 struct obd_import *imp = request->rq_import;
410 struct lustre_handle old_hdl;
415 spin_lock_irqsave(&imp->imp_lock, flags);
416 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
417 spin_unlock_irqrestore(&imp->imp_lock, flags);
420 spin_unlock_irqrestore(&imp->imp_lock, flags);
424 LASSERT(imp->imp_conn_current);
425 imp->imp_conn_current->oic_last_attempt = 0;
427 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
429 if (aa->pcaa_initial_connect) {
430 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
431 CDEBUG(D_HA, "connected to replayable target: %s\n",
432 imp->imp_target_uuid.uuid);
433 imp->imp_pingable = imp->imp_replayable = 1;
435 imp->imp_replayable = 0;
437 LASSERTF(imp->imp_conn_cnt < request->rq_repmsg->conn_cnt,
438 "imp conn_cnt %d req conn_cnt %d",
439 imp->imp_conn_cnt, request->rq_repmsg->conn_cnt);
440 imp->imp_conn_cnt = request->rq_repmsg->conn_cnt;
441 imp->imp_remote_handle = request->rq_repmsg->handle;
442 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
443 GOTO(finish, rc = 0);
446 /* Determine what recovery state to move the import to. */
447 if (MSG_CONNECT_RECONNECT & msg_flags) {
448 memset(&old_hdl, 0, sizeof(old_hdl));
449 if (!memcmp(&old_hdl, &request->rq_repmsg->handle,
451 CERROR("%s@%s didn't like our handle "LPX64
452 ", failed\n", imp->imp_target_uuid.uuid,
453 imp->imp_connection->c_remote_uuid.uuid,
454 imp->imp_dlm_handle.cookie);
455 GOTO(out, rc = -ENOTCONN);
458 if (memcmp(&imp->imp_remote_handle, &request->rq_repmsg->handle,
459 sizeof(imp->imp_remote_handle))) {
460 CERROR("%s@%s changed handle from "LPX64" to "LPX64
461 "; copying, but this may foreshadow disaster\n",
462 imp->imp_target_uuid.uuid,
463 imp->imp_connection->c_remote_uuid.uuid,
464 imp->imp_remote_handle.cookie,
465 request->rq_repmsg->handle.cookie);
466 imp->imp_remote_handle = request->rq_repmsg->handle;
468 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
469 imp->imp_target_uuid.uuid,
470 imp->imp_connection->c_remote_uuid.uuid);
473 if (imp->imp_invalid) {
474 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
475 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
476 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
477 imp->imp_obd->obd_name,
478 imp->imp_target_uuid.uuid);
479 imp->imp_resend_replay = 1;
480 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
482 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
484 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
485 LASSERT(imp->imp_replayable);
486 imp->imp_remote_handle = request->rq_repmsg->handle;
487 imp->imp_last_replay_transno = 0;
488 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
490 CDEBUG(D_HA, "oops! we get evicted from %s\n", imp->imp_target_uuid.uuid);
491 imp->imp_remote_handle = request->rq_repmsg->handle;
492 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
495 /* Sanity checks for a reconnected import. */
496 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
497 CERROR("imp_replayable flag does not match server "
498 "after reconnect. We should LBUG right here.\n");
501 if (request->rq_repmsg->last_committed < aa->pcaa_peer_committed) {
502 CERROR("%s went back in time (transno "LPD64
503 " was previously committed, server now claims "LPD64
504 ")! is shared storage not coherent?\n",
505 imp->imp_target_uuid.uuid,
506 aa->pcaa_peer_committed,
507 request->rq_repmsg->last_committed);
511 rc = ptlrpc_import_recovery_state_machine(imp);
513 if (rc == -ENOTCONN) {
514 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
515 "invalidating and reconnecting\n",
516 imp->imp_target_uuid.uuid,
517 imp->imp_connection->c_remote_uuid.uuid);
518 ptlrpc_connect_import(imp, NULL);
524 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
525 if (aa->pcaa_initial_connect && !imp->imp_initial_recov)
526 ptlrpc_deactivate_import(imp);
527 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
528 imp->imp_target_uuid.uuid,
529 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
532 wake_up(&imp->imp_recovery_waitq);
536 static int completed_replay_interpret(struct ptlrpc_request *req,
539 atomic_dec(&req->rq_import->imp_replay_inflight);
540 if (req->rq_status == 0) {
541 ptlrpc_import_recovery_state_machine(req->rq_import);
543 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
545 req->rq_import->imp_obd->obd_name, req->rq_status);
546 ptlrpc_connect_import(req->rq_import, NULL);
552 static int signal_completed_replay(struct obd_import *imp)
554 struct ptlrpc_request *req;
557 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
558 atomic_inc(&imp->imp_replay_inflight);
560 req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 0, NULL, NULL);
562 atomic_dec(&imp->imp_replay_inflight);
566 req->rq_replen = lustre_msg_size(0, NULL);
567 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
568 req->rq_reqmsg->flags |= MSG_LAST_REPLAY;
569 req->rq_timeout *= 3;
570 req->rq_interpret_reply = completed_replay_interpret;
572 ptlrpcd_add_req(req);
577 static int ptlrpc_invalidate_import_thread(void *data)
579 struct obd_import *imp = data;
587 SIGNAL_MASK_LOCK(current, flags);
588 sigfillset(¤t->blocked);
590 SIGNAL_MASK_UNLOCK(current, flags);
591 THREAD_NAME(current->comm, sizeof(current->comm), "ll_imp_inval");
594 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
595 imp->imp_obd->obd_name, imp->imp_target_uuid.uuid,
596 imp->imp_connection->c_remote_uuid.uuid);
598 ptlrpc_invalidate_import(imp, 0);
599 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
601 ptlrpc_import_recovery_state_machine(imp);
607 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
612 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
613 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
614 imp->imp_target_uuid.uuid,
615 imp->imp_connection->c_remote_uuid.uuid);
618 rc = kernel_thread(ptlrpc_invalidate_import_thread, imp,
619 CLONE_VM | CLONE_FILES);
621 CERROR("error starting invalidate thread: %d\n", rc);
624 ptlrpc_invalidate_import(imp, 1);
626 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
630 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
631 CDEBUG(D_HA, "replay requested by %s\n",
632 imp->imp_target_uuid.uuid);
633 rc = ptlrpc_replay_next(imp, &inflight);
635 atomic_read(&imp->imp_replay_inflight) == 0) {
636 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
637 rc = ldlm_replay_locks(imp);
644 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
645 if (atomic_read(&imp->imp_replay_inflight) == 0) {
646 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
647 rc = signal_completed_replay(imp);
654 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
655 if (atomic_read(&imp->imp_replay_inflight) == 0) {
656 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
660 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
661 CDEBUG(D_HA, "reconnected to %s@%s\n",
662 imp->imp_target_uuid.uuid,
663 imp->imp_connection->c_remote_uuid.uuid);
665 rc = ptlrpc_resend(imp);
668 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
669 ptlrpc_activate_import(imp);
670 CWARN("%s: connection restored to %s@%s\n",
671 imp->imp_obd->obd_name,
672 imp->imp_target_uuid.uuid,
673 imp->imp_connection->c_remote_uuid.uuid);
676 if (imp->imp_state == LUSTRE_IMP_FULL) {
677 wake_up(&imp->imp_recovery_waitq);
678 ptlrpc_wake_delayed(imp);
685 static int back_to_sleep(void *unused)
690 int ptlrpc_disconnect_import(struct obd_import *imp)
692 struct ptlrpc_request *request;
698 switch (imp->imp_connect_op) {
699 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
700 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
701 case MGMT_CONNECT: rq_opc = MGMT_DISCONNECT; break;
703 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
704 imp->imp_target_uuid.uuid, imp->imp_connect_op);
709 if (ptlrpc_import_in_recovery(imp)) {
710 struct l_wait_info lwi;
711 unsigned long timeout;
712 if (imp->imp_server_timeout)
713 timeout = obd_timeout / 2;
715 timeout = obd_timeout;
716 timeout = MAX(timeout * HZ, 1);
717 lwi = LWI_TIMEOUT_INTR(obd_timeout, back_to_sleep, NULL, NULL);
718 rc = l_wait_event(imp->imp_recovery_waitq,
719 !ptlrpc_import_in_recovery(imp), &lwi);
723 spin_lock_irqsave(&imp->imp_lock, flags);
724 if (imp->imp_state != LUSTRE_IMP_FULL) {
727 spin_unlock_irqrestore(&imp->imp_lock, flags);
729 request = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, rq_opc,
732 /* For non-replayable connections, don't attempt
733 reconnect if this fails */
734 if (!imp->imp_replayable) {
735 request->rq_no_resend = 1;
736 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
737 request->rq_send_state = LUSTRE_IMP_CONNECTING;
739 request->rq_replen = lustre_msg_size(0, NULL);
740 rc = ptlrpc_queue_wait(request);
741 ptlrpc_req_finished(request);
744 spin_lock_irqsave(&imp->imp_lock, flags);
746 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
747 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
748 imp->imp_conn_cnt = 0;
749 spin_unlock_irqrestore(&imp->imp_lock, flags);