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 the Lustre file system, http://www.lustre.org
8 * Lustre is a trademark of Cluster File Systems, Inc.
10 * You may have signed or agreed to another license before downloading
11 * this software. If so, you are bound by the terms and conditions
12 * of that agreement, and the following does not apply to you. See the
13 * LICENSE file included with this distribution for more information.
15 * If you did not agree to a different license, then this copy of Lustre
16 * is open source software; you can redistribute it and/or modify it
17 * under the terms of version 2 of the GNU General Public License as
18 * published by the Free Software Foundation.
20 * In either case, Lustre is distributed in the hope that it will be
21 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
22 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * license text for more details.
26 #define DEBUG_SUBSYSTEM S_RPC
28 # include <liblustre.h>
31 #include <obd_support.h>
32 #include <lustre_ha.h>
33 #include <lustre_net.h>
34 #include <lustre_import.h>
35 #include <lustre_export.h>
37 #include <obd_class.h>
39 #include "ptlrpc_internal.h"
41 struct ptlrpc_connect_async_args {
42 __u64 pcaa_peer_committed;
43 int pcaa_initial_connect;
46 /* A CLOSED import should remain so. */
47 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
49 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
50 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
51 imp, obd2cli_tgt(imp->imp_obd), \
52 ptlrpc_import_state_name(imp->imp_state), \
53 ptlrpc_import_state_name(state)); \
54 imp->imp_state = state; \
58 #define IMPORT_SET_STATE(imp, state) \
60 spin_lock(&imp->imp_lock); \
61 IMPORT_SET_STATE_NOLOCK(imp, state); \
62 spin_unlock(&imp->imp_lock); \
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)
77 spin_lock(&imp->imp_lock);
79 imp->imp_generation++;
80 imp->imp_state = LUSTRE_IMP_NEW;
82 spin_unlock(&imp->imp_lock);
86 EXPORT_SYMBOL(ptlrpc_init_import);
88 #define UUID_STR "_UUID"
89 static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
92 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
93 ? uuid : uuid + strlen(prefix);
95 *uuid_len = strlen(*uuid_start);
97 if (*uuid_len < strlen(UUID_STR))
100 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
101 UUID_STR, strlen(UUID_STR)))
102 *uuid_len -= strlen(UUID_STR);
105 /* Returns true if import was FULL, false if import was already not
107 * @imp - import to be disconnected
108 * @conn_cnt - connection count (epoch) of the request that timed out
109 * and caused the disconnection. In some cases, multiple
110 * inflight requests can fail to a single target (e.g. OST
111 * bulk requests) and if one has already caused a reconnection
112 * (increasing the import->conn_cnt) the older failure should
113 * not also cause a reconnection. If zero it forces a reconnect.
115 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
119 spin_lock(&imp->imp_lock);
121 if (imp->imp_state == LUSTRE_IMP_FULL &&
122 (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
126 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
127 &target_start, &target_len);
129 if (imp->imp_replayable) {
130 LCONSOLE_WARN("%s: Connection to service %.*s via nid "
131 "%s was lost; in progress operations using this "
132 "service will wait for recovery to complete.\n",
133 imp->imp_obd->obd_name, target_len, target_start,
134 libcfs_nid2str(imp->imp_connection->c_peer.nid));
136 LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
137 "%.*s via nid %s was lost; in progress"
138 "operations using this service will"
140 imp->imp_obd->obd_name,
141 target_len, target_start,
142 libcfs_nid2str(imp->imp_connection->c_peer.nid));
144 ptlrpc_deactivate_timeouts(imp);
145 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
146 spin_unlock(&imp->imp_lock);
148 if (obd_dump_on_timeout)
149 libcfs_debug_dumplog();
151 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
154 spin_unlock(&imp->imp_lock);
155 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
156 imp->imp_client->cli_name, imp,
157 (imp->imp_state == LUSTRE_IMP_FULL &&
158 imp->imp_conn_cnt > conn_cnt) ?
159 "reconnected" : "not connected", imp->imp_conn_cnt,
160 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
167 * This acts as a barrier; all existing requests are rejected, and
168 * no new requests will be accepted until the import is valid again.
170 void ptlrpc_deactivate_import(struct obd_import *imp)
174 spin_lock(&imp->imp_lock);
175 if (imp->imp_invalid) {
176 spin_unlock(&imp->imp_lock);
181 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
182 imp->imp_invalid = 1;
183 imp->imp_generation++;
184 spin_unlock(&imp->imp_lock);
186 ptlrpc_abort_inflight(imp);
187 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
193 * This function will invalidate the import, if necessary, then block
194 * for all the RPC completions, and finally notify the obd to
195 * invalidate its state (ie cancel locks, clear pending requests,
198 void ptlrpc_invalidate_import(struct obd_import *imp)
200 struct l_wait_info lwi;
203 atomic_inc(&imp->imp_inval_count);
205 ptlrpc_deactivate_import(imp);
207 LASSERT(imp->imp_invalid);
209 /* wait for all requests to error out and call completion callbacks */
210 lwi = LWI_TIMEOUT_INTERVAL(cfs_timeout_cap(cfs_time_seconds(obd_timeout)),
212 rc = l_wait_event(imp->imp_recovery_waitq,
213 (atomic_read(&imp->imp_inflight) == 0), &lwi);
216 CDEBUG(D_HA, "%s: rc = %d waiting for callback (%d != 0)\n",
217 obd2cli_tgt(imp->imp_obd), rc,
218 atomic_read(&imp->imp_inflight));
220 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
221 sptlrpc_import_flush_all_ctx(imp);
223 atomic_dec(&imp->imp_inval_count);
224 cfs_waitq_signal(&imp->imp_recovery_waitq);
227 /* unset imp_invalid */
228 void ptlrpc_activate_import(struct obd_import *imp)
230 struct obd_device *obd = imp->imp_obd;
232 spin_lock(&imp->imp_lock);
233 imp->imp_invalid = 0;
234 ptlrpc_activate_timeouts(imp);
235 spin_unlock(&imp->imp_lock);
236 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
239 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
243 LASSERT(!imp->imp_dlm_fake);
245 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
246 if (!imp->imp_replayable) {
247 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
248 "auto-deactivating\n",
249 obd2cli_tgt(imp->imp_obd),
250 imp->imp_connection->c_remote_uuid.uuid,
251 imp->imp_obd->obd_name);
252 ptlrpc_deactivate_import(imp);
255 CDEBUG(D_HA, "%s: waking up pinger\n",
256 obd2cli_tgt(imp->imp_obd));
258 spin_lock(&imp->imp_lock);
259 imp->imp_force_verify = 1;
260 spin_unlock(&imp->imp_lock);
262 ptlrpc_pinger_wake_up();
267 static int import_select_connection(struct obd_import *imp)
269 struct obd_import_conn *imp_conn = NULL, *conn;
270 struct obd_export *dlmexp;
273 spin_lock(&imp->imp_lock);
275 if (list_empty(&imp->imp_conn_list)) {
276 CERROR("%s: no connections available\n",
277 imp->imp_obd->obd_name);
278 spin_unlock(&imp->imp_lock);
282 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
283 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
284 imp->imp_obd->obd_name,
285 libcfs_nid2str(conn->oic_conn->c_peer.nid),
286 conn->oic_last_attempt);
287 /* Throttle the reconnect rate to once per RECONNECT_INTERVAL */
288 if (cfs_time_before_64(conn->oic_last_attempt +
289 RECONNECT_INTERVAL * HZ,
290 cfs_time_current_64())) {
291 /* If we have never tried this connection since the
292 the last successful attempt, go with this one */
293 if (cfs_time_beforeq_64(conn->oic_last_attempt,
294 imp->imp_last_success_conn)) {
299 /* Both of these connections have already been tried
300 since the last successful connection; just choose the
301 least recently used */
304 else if (cfs_time_before_64(conn->oic_last_attempt,
305 imp_conn->oic_last_attempt))
310 /* if not found, simply choose the current one */
312 LASSERT(imp->imp_conn_current);
313 imp_conn = imp->imp_conn_current;
315 LASSERT(imp_conn->oic_conn);
317 imp_conn->oic_last_attempt = cfs_time_current_64();
319 /* switch connection, don't mind if it's same as the current one */
320 if (imp->imp_connection)
321 ptlrpc_put_connection(imp->imp_connection);
322 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
324 dlmexp = class_conn2export(&imp->imp_dlm_handle);
325 LASSERT(dlmexp != NULL);
326 if (dlmexp->exp_connection)
327 ptlrpc_put_connection(dlmexp->exp_connection);
328 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
329 class_export_put(dlmexp);
331 if (imp->imp_conn_current != imp_conn) {
332 if (imp->imp_conn_current)
333 LCONSOLE_INFO("Changing connection for %s to %s/%s\n",
334 imp->imp_obd->obd_name,
335 imp_conn->oic_uuid.uuid,
336 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
337 imp->imp_conn_current = imp_conn;
340 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
341 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
342 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
344 spin_unlock(&imp->imp_lock);
350 * must be called under imp_lock
352 int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
354 struct ptlrpc_request *req;
355 struct list_head *tmp;
357 if (list_empty(&imp->imp_replay_list))
359 tmp = imp->imp_replay_list.next;
360 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
361 *transno = req->rq_transno;
365 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
367 struct obd_device *obd = imp->imp_obd;
368 int initial_connect = 0;
370 __u64 committed_before_reconnect = 0;
371 struct ptlrpc_request *request;
372 char *bufs[] = { NULL,
373 obd2cli_tgt(imp->imp_obd),
375 (char *)&imp->imp_dlm_handle,
376 (char *)&imp->imp_connect_data };
377 struct ptlrpc_connect_async_args *aa;
381 spin_lock(&imp->imp_lock);
382 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
383 spin_unlock(&imp->imp_lock);
384 CERROR("can't connect to a closed import\n");
386 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
387 spin_unlock(&imp->imp_lock);
388 CERROR("already connected\n");
390 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
391 spin_unlock(&imp->imp_lock);
392 CERROR("already connecting\n");
396 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
399 imp->imp_resend_replay = 0;
401 if (!lustre_handle_is_used(&imp->imp_remote_handle))
404 committed_before_reconnect = imp->imp_peer_committed_transno;
406 set_transno = ptlrpc_first_transno(imp, &imp->imp_connect_data.ocd_transno);
407 spin_unlock(&imp->imp_lock);
410 struct obd_uuid uuid;
412 obd_str2uuid(&uuid, new_uuid);
413 rc = import_set_conn_priority(imp, &uuid);
418 rc = import_select_connection(imp);
422 /* last in connection list */
423 if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
424 if (imp->imp_initial_recov_bk && initial_connect) {
425 CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
426 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
427 /* Don't retry if connect fails */
429 obd_set_info_async(obd->obd_self_export,
430 strlen(KEY_INIT_RECOV),
432 sizeof(rc), &rc, NULL);
434 if (imp->imp_recon_bk) {
435 CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
436 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
437 spin_lock(&imp->imp_lock);
438 imp->imp_last_recon = 1;
439 spin_unlock(&imp->imp_lock);
443 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
447 /* Reset connect flags to the originally requested flags, in case
448 * the server is updated on-the-fly we will get the new features. */
449 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
450 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
451 &obd->obd_uuid, &imp->imp_connect_data);
455 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
457 GOTO(out, rc = -ENOMEM);
459 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
460 imp->imp_connect_op, bufs, NULL);
462 ptlrpc_request_free(request);
467 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
469 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
471 request->rq_send_state = LUSTRE_IMP_CONNECTING;
472 /* Allow a slightly larger reply for future growth compatibility */
473 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
474 sizeof(struct obd_connect_data)+16*sizeof(__u64));
475 ptlrpc_request_set_replen(request);
476 request->rq_interpret_reply = ptlrpc_connect_interpret;
478 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
479 aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
480 memset(aa, 0, sizeof *aa);
482 aa->pcaa_peer_committed = committed_before_reconnect;
483 aa->pcaa_initial_connect = initial_connect;
485 if (aa->pcaa_initial_connect) {
486 spin_lock(&imp->imp_lock);
487 imp->imp_replayable = 1;
488 spin_unlock(&imp->imp_lock);
489 /* On an initial connect, we don't know which one of a
490 failover server pair is up. Don't wait long. */
492 request->rq_timeout = max((int)(obd_timeout / 2), 5);
494 request->rq_timeout = max((int)(obd_timeout / 20), 5);
496 lustre_msg_add_op_flags(request->rq_reqmsg,
497 MSG_CONNECT_INITIAL);
501 lustre_msg_add_op_flags(request->rq_reqmsg,
502 MSG_CONNECT_TRANSNO);
504 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request");
505 ptlrpcd_add_req(request);
509 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
514 EXPORT_SYMBOL(ptlrpc_connect_import);
516 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
519 struct obd_import_conn *imp_conn;
525 spin_lock(&imp->imp_lock);
526 if (list_empty(&imp->imp_conn_list))
530 imp_conn = list_entry(imp->imp_conn_list.prev,
531 struct obd_import_conn,
534 if (imp->imp_conn_current != imp_conn) {
535 ptlrpc_ping_import_soon(imp);
539 /* liblustre has no pinger thead, so we wakup pinger anyway */
544 spin_unlock(&imp->imp_lock);
547 ptlrpc_pinger_wake_up();
552 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
555 struct ptlrpc_connect_async_args *aa = data;
556 struct obd_import *imp = request->rq_import;
557 struct client_obd *cli = &imp->imp_obd->u.cli;
558 struct lustre_handle old_hdl;
562 spin_lock(&imp->imp_lock);
563 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
564 spin_unlock(&imp->imp_lock);
567 spin_unlock(&imp->imp_lock);
572 LASSERT(imp->imp_conn_current);
574 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
576 /* All imports are pingable */
577 spin_lock(&imp->imp_lock);
578 imp->imp_pingable = 1;
580 if (aa->pcaa_initial_connect) {
581 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
582 imp->imp_replayable = 1;
583 spin_unlock(&imp->imp_lock);
584 CDEBUG(D_HA, "connected to replayable target: %s\n",
585 obd2cli_tgt(imp->imp_obd));
587 imp->imp_replayable = 0;
588 spin_unlock(&imp->imp_lock);
591 if (msg_flags & MSG_CONNECT_NEXT_VER) {
592 imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2;
593 CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v2\n",
594 obd2cli_tgt(imp->imp_obd));
596 CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v1\n",
597 obd2cli_tgt(imp->imp_obd));
600 imp->imp_remote_handle =
601 *lustre_msg_get_handle(request->rq_repmsg);
603 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
604 ptlrpc_activate_import(imp);
605 GOTO(finish, rc = 0);
607 spin_unlock(&imp->imp_lock);
610 /* Determine what recovery state to move the import to. */
611 if (MSG_CONNECT_RECONNECT & msg_flags) {
612 memset(&old_hdl, 0, sizeof(old_hdl));
613 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
615 CERROR("%s@%s didn't like our handle "LPX64
616 ", failed\n", obd2cli_tgt(imp->imp_obd),
617 imp->imp_connection->c_remote_uuid.uuid,
618 imp->imp_dlm_handle.cookie);
619 GOTO(out, rc = -ENOTCONN);
622 if (memcmp(&imp->imp_remote_handle,
623 lustre_msg_get_handle(request->rq_repmsg),
624 sizeof(imp->imp_remote_handle))) {
626 /* Old MGC can reconnect to a restarted MGS */
627 if (strcmp(imp->imp_obd->obd_type->typ_name,
628 LUSTRE_MGC_NAME) == 0) {
632 "%s@%s changed handle from "LPX64" to "LPX64
633 "; copying, but this may foreshadow disaster\n",
634 obd2cli_tgt(imp->imp_obd),
635 imp->imp_connection->c_remote_uuid.uuid,
636 imp->imp_remote_handle.cookie,
637 lustre_msg_get_handle(request->rq_repmsg)->
639 imp->imp_remote_handle =
640 *lustre_msg_get_handle(request->rq_repmsg);
642 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
643 obd2cli_tgt(imp->imp_obd),
644 imp->imp_connection->c_remote_uuid.uuid);
647 if (imp->imp_invalid) {
648 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
649 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
650 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
651 imp->imp_obd->obd_name,
652 obd2cli_tgt(imp->imp_obd));
654 spin_lock(&imp->imp_lock);
655 imp->imp_resend_replay = 1;
656 spin_unlock(&imp->imp_lock);
658 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
660 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
662 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
663 LASSERT(imp->imp_replayable);
664 imp->imp_remote_handle =
665 *lustre_msg_get_handle(request->rq_repmsg);
666 imp->imp_last_replay_transno = 0;
667 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
669 imp->imp_remote_handle =
670 *lustre_msg_get_handle(request->rq_repmsg);
671 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
674 /* Sanity checks for a reconnected import. */
675 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
676 CERROR("imp_replayable flag does not match server "
677 "after reconnect. We should LBUG right here.\n");
680 if (lustre_msg_get_last_committed(request->rq_repmsg) <
681 aa->pcaa_peer_committed) {
682 CERROR("%s went back in time (transno "LPD64
683 " was previously committed, server now claims "LPD64
684 ")! See https://bugzilla.clusterfs.com/"
685 "long_list.cgi?buglist=9646\n",
686 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
687 lustre_msg_get_last_committed(request->rq_repmsg));
691 rc = ptlrpc_import_recovery_state_machine(imp);
693 if (rc == -ENOTCONN) {
694 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
695 "invalidating and reconnecting\n",
696 obd2cli_tgt(imp->imp_obd),
697 imp->imp_connection->c_remote_uuid.uuid);
698 ptlrpc_connect_import(imp, NULL);
702 struct obd_connect_data *ocd;
703 struct obd_export *exp;
705 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
707 /* server replied obd_connect_data is always bigger */
708 ocd = req_capsule_server_sized_get(&request->rq_pill,
709 &RMF_CONNECT_DATA, ret);
711 spin_lock(&imp->imp_lock);
712 list_del(&imp->imp_conn_current->oic_item);
713 list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list);
714 imp->imp_last_success_conn =
715 imp->imp_conn_current->oic_last_attempt;
718 spin_unlock(&imp->imp_lock);
719 CERROR("Wrong connect data from server\n");
724 imp->imp_connect_data = *ocd;
726 exp = class_conn2export(&imp->imp_dlm_handle);
727 spin_unlock(&imp->imp_lock);
729 /* check that server granted subset of flags we asked for. */
730 LASSERTF((ocd->ocd_connect_flags &
731 imp->imp_connect_flags_orig) ==
732 ocd->ocd_connect_flags, LPX64" != "LPX64,
733 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
736 /* This could happen if export is cleaned during the
738 CERROR("Missing export for %s\n",
739 imp->imp_obd->obd_name);
740 GOTO(out, rc = -ENODEV);
742 exp->exp_connect_flags = ocd->ocd_connect_flags;
743 imp->imp_obd->obd_self_export->exp_connect_flags =
744 ocd->ocd_connect_flags;
745 class_export_put(exp);
747 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
749 if (!ocd->ocd_ibits_known &&
750 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
751 CERROR("Inodebits aware server returned zero compatible"
754 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
755 (ocd->ocd_version > LUSTRE_VERSION_CODE +
756 LUSTRE_VERSION_OFFSET_WARN ||
757 ocd->ocd_version < LUSTRE_VERSION_CODE -
758 LUSTRE_VERSION_OFFSET_WARN)) {
759 /* Sigh, some compilers do not like #ifdef in the middle
760 of macro arguments */
763 "older. Consider upgrading this client";
766 "older. Consider recompiling this application";
768 const char *newer = "newer than client version";
770 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
772 obd2cli_tgt(imp->imp_obd),
773 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
774 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
775 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
776 OBD_OCD_VERSION_FIX(ocd->ocd_version),
777 ocd->ocd_version > LUSTRE_VERSION_CODE ?
778 newer : older, LUSTRE_VERSION_STRING);
781 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
782 cli->cl_max_pages_per_rpc =
783 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
786 imp->imp_obd->obd_namespace->ns_connect_flags =
787 ocd->ocd_connect_flags;
788 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
789 ocd->ocd_connect_flags;
791 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
792 (cli->cl_max_pages_per_rpc > 0));
797 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
798 if (aa->pcaa_initial_connect && !imp->imp_initial_recov &&
799 (request->rq_import_generation == imp->imp_generation))
800 ptlrpc_deactivate_import(imp);
802 if ((imp->imp_recon_bk && imp->imp_last_recon) ||
805 * Give up trying to reconnect
806 * EACCES means client has no permission for connection
808 imp->imp_obd->obd_no_recov = 1;
809 ptlrpc_deactivate_import(imp);
813 struct obd_connect_data *ocd;
815 /* reply message might not be ready */
816 if (request->rq_repmsg == NULL)
819 ocd = req_capsule_server_get(&request->rq_pill,
822 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
823 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
824 /* Actually servers are only supposed to refuse
825 connection from liblustre clients, so we should
826 never see this from VFS context */
827 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
829 " refused connection from this client "
830 "with an incompatible version (%s). "
831 "Client must be recompiled\n",
832 obd2cli_tgt(imp->imp_obd),
833 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
834 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
835 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
836 OBD_OCD_VERSION_FIX(ocd->ocd_version),
837 LUSTRE_VERSION_STRING);
838 ptlrpc_deactivate_import(imp);
839 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
844 ptlrpc_maybe_ping_import_soon(imp);
846 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
847 obd2cli_tgt(imp->imp_obd),
848 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
851 spin_lock(&imp->imp_lock);
852 imp->imp_last_recon = 0;
853 spin_unlock(&imp->imp_lock);
855 cfs_waitq_signal(&imp->imp_recovery_waitq);
859 static int completed_replay_interpret(struct ptlrpc_request *req,
863 atomic_dec(&req->rq_import->imp_replay_inflight);
864 if (req->rq_status == 0) {
865 ptlrpc_import_recovery_state_machine(req->rq_import);
867 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
869 req->rq_import->imp_obd->obd_name, req->rq_status);
870 ptlrpc_connect_import(req->rq_import, NULL);
876 static int signal_completed_replay(struct obd_import *imp)
878 struct ptlrpc_request *req;
881 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
882 atomic_inc(&imp->imp_replay_inflight);
884 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
887 atomic_dec(&imp->imp_replay_inflight);
891 ptlrpc_request_set_replen(req);
892 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
893 lustre_msg_add_flags(req->rq_reqmsg,
894 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
895 req->rq_timeout *= 3;
896 req->rq_interpret_reply = completed_replay_interpret;
898 ptlrpcd_add_req(req);
903 static int ptlrpc_invalidate_import_thread(void *data)
905 struct obd_import *imp = data;
909 ptlrpc_daemonize("ll_imp_inval");
911 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
912 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
913 imp->imp_connection->c_remote_uuid.uuid);
915 ptlrpc_invalidate_import(imp);
917 if (obd_dump_on_eviction) {
918 CERROR("dump the log upon eviction\n");
919 libcfs_debug_dumplog();
922 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
923 ptlrpc_import_recovery_state_machine(imp);
929 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
937 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
938 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
939 &target_start, &target_len);
940 /* Don't care about MGC eviction */
941 if (strcmp(imp->imp_obd->obd_type->typ_name,
942 LUSTRE_MGC_NAME) != 0) {
943 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
944 "%.*s; in progress operations using "
945 "this service will fail.\n",
946 target_len, target_start);
948 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
949 obd2cli_tgt(imp->imp_obd),
950 imp->imp_connection->c_remote_uuid.uuid);
953 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
954 CLONE_VM | CLONE_FILES);
956 CERROR("error starting invalidate thread: %d\n", rc);
961 ptlrpc_invalidate_import(imp);
963 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
967 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
968 CDEBUG(D_HA, "replay requested by %s\n",
969 obd2cli_tgt(imp->imp_obd));
970 rc = ptlrpc_replay_next(imp, &inflight);
972 atomic_read(&imp->imp_replay_inflight) == 0) {
973 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
974 rc = ldlm_replay_locks(imp);
981 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
982 if (atomic_read(&imp->imp_replay_inflight) == 0) {
983 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
984 rc = signal_completed_replay(imp);
991 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
992 if (atomic_read(&imp->imp_replay_inflight) == 0) {
993 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
997 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
998 CDEBUG(D_HA, "reconnected to %s@%s\n",
999 obd2cli_tgt(imp->imp_obd),
1000 imp->imp_connection->c_remote_uuid.uuid);
1002 rc = ptlrpc_resend(imp);
1005 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1006 ptlrpc_activate_import(imp);
1008 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1009 &target_start, &target_len);
1010 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1011 "using nid %s.\n", imp->imp_obd->obd_name,
1012 target_len, target_start,
1013 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1016 if (imp->imp_state == LUSTRE_IMP_FULL) {
1017 cfs_waitq_signal(&imp->imp_recovery_waitq);
1018 ptlrpc_wake_delayed(imp);
1025 static int back_to_sleep(void *unused)
1030 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1032 struct ptlrpc_request *req;
1034 int nowait = imp->imp_obd->obd_force;
1038 GOTO(set_state, rc);
1040 switch (imp->imp_connect_op) {
1041 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1042 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1043 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1045 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1046 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1050 if (ptlrpc_import_in_recovery(imp)) {
1051 struct l_wait_info lwi;
1052 cfs_duration_t timeout;
1053 if (imp->imp_server_timeout)
1054 timeout = cfs_time_seconds(obd_timeout / 2);
1056 timeout = cfs_time_seconds(obd_timeout);
1058 timeout = MAX(timeout * HZ, 1);
1060 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1061 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1062 rc = l_wait_event(imp->imp_recovery_waitq,
1063 !ptlrpc_import_in_recovery(imp), &lwi);
1067 spin_lock(&imp->imp_lock);
1068 if (imp->imp_state != LUSTRE_IMP_FULL)
1071 spin_unlock(&imp->imp_lock);
1073 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1074 LUSTRE_OBD_VERSION, rq_opc);
1076 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1077 * it fails. We can get through the above with a down server
1078 * if the client doesn't know the server is gone yet. */
1079 req->rq_no_resend = 1;
1081 req->rq_timeout = obd_timeout / 3;
1083 req->rq_timeout = 5;
1085 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1086 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1087 ptlrpc_request_set_replen(req);
1088 rc = ptlrpc_queue_wait(req);
1089 ptlrpc_req_finished(req);
1093 spin_lock(&imp->imp_lock);
1096 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1098 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1099 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1100 imp->imp_conn_cnt = 0;
1101 imp->imp_last_recon = 0;
1102 spin_unlock(&imp->imp_lock);