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;
371 __u64 committed_before_reconnect = 0;
372 struct ptlrpc_request *request;
373 int size[] = { sizeof(struct ptlrpc_body),
374 sizeof(imp->imp_obd->u.cli.cl_target_uuid),
375 sizeof(obd->obd_uuid),
376 sizeof(imp->imp_dlm_handle),
377 sizeof(imp->imp_connect_data) };
378 char *tmp[] = { NULL,
379 obd2cli_tgt(imp->imp_obd),
381 (char *)&imp->imp_dlm_handle,
382 (char *)&imp->imp_connect_data };
383 struct ptlrpc_connect_async_args *aa;
386 spin_lock(&imp->imp_lock);
387 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
388 spin_unlock(&imp->imp_lock);
389 CERROR("can't connect to a closed import\n");
391 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
392 spin_unlock(&imp->imp_lock);
393 CERROR("already connected\n");
395 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
396 spin_unlock(&imp->imp_lock);
397 CERROR("already connecting\n");
401 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
404 imp->imp_resend_replay = 0;
406 if (!lustre_handle_is_used(&imp->imp_remote_handle))
409 committed_before_reconnect = imp->imp_peer_committed_transno;
411 set_transno = ptlrpc_first_transno(imp, &imp->imp_connect_data.ocd_transno);
412 spin_unlock(&imp->imp_lock);
415 struct obd_uuid uuid;
417 obd_str2uuid(&uuid, new_uuid);
418 rc = import_set_conn_priority(imp, &uuid);
423 rc = import_select_connection(imp);
427 /* last in connection list */
428 if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
429 if (imp->imp_initial_recov_bk && initial_connect) {
430 CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
431 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
432 /* Don't retry if connect fails */
434 obd_set_info_async(obd->obd_self_export,
435 strlen(KEY_INIT_RECOV),
437 sizeof(rc), &rc, NULL);
439 if (imp->imp_recon_bk) {
440 CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
441 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
442 spin_lock(&imp->imp_lock);
443 imp->imp_last_recon = 1;
444 spin_unlock(&imp->imp_lock);
448 /* Reset connect flags to the originally requested flags, in case
449 * the server is updated on-the-fly we will get the new features. */
450 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
451 rc = obd_reconnect(imp->imp_obd->obd_self_export, obd,
452 &obd->obd_uuid, &imp->imp_connect_data);
456 request = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, imp->imp_connect_op,
459 GOTO(out, rc = -ENOMEM);
462 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
464 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
466 request->rq_send_state = LUSTRE_IMP_CONNECTING;
467 /* Allow a slightly larger reply for future growth compatibility */
468 size[REPLY_REC_OFF] = sizeof(struct obd_connect_data) +
470 ptlrpc_req_set_repsize(request, 2, size);
471 request->rq_interpret_reply = ptlrpc_connect_interpret;
473 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
474 aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
475 memset(aa, 0, sizeof *aa);
477 aa->pcaa_peer_committed = committed_before_reconnect;
478 aa->pcaa_initial_connect = initial_connect;
480 if (aa->pcaa_initial_connect) {
481 spin_lock(&imp->imp_lock);
482 imp->imp_replayable = 1;
483 spin_unlock(&imp->imp_lock);
484 /* On an initial connect, we don't know which one of a
485 failover server pair is up. Don't wait long. */
487 request->rq_timeout = max((int)(obd_timeout / 2), 5);
489 request->rq_timeout = max((int)(obd_timeout / 20), 5);
491 lustre_msg_add_op_flags(request->rq_reqmsg,
492 MSG_CONNECT_INITIAL);
496 lustre_msg_add_op_flags(request->rq_reqmsg,
497 MSG_CONNECT_TRANSNO);
499 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request");
500 ptlrpcd_add_req(request);
504 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
509 EXPORT_SYMBOL(ptlrpc_connect_import);
511 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
514 struct obd_import_conn *imp_conn;
520 spin_lock(&imp->imp_lock);
521 if (list_empty(&imp->imp_conn_list))
525 imp_conn = list_entry(imp->imp_conn_list.prev,
526 struct obd_import_conn,
529 if (imp->imp_conn_current != imp_conn) {
530 ptlrpc_ping_import_soon(imp);
534 /* liblustre has no pinger thead, so we wakup pinger anyway */
539 spin_unlock(&imp->imp_lock);
542 ptlrpc_pinger_wake_up();
547 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
550 struct ptlrpc_connect_async_args *aa = data;
551 struct obd_import *imp = request->rq_import;
552 struct client_obd *cli = &imp->imp_obd->u.cli;
553 struct lustre_handle old_hdl;
557 spin_lock(&imp->imp_lock);
558 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
559 spin_unlock(&imp->imp_lock);
562 spin_unlock(&imp->imp_lock);
567 rc = sptlrpc_cli_install_rvs_ctx(imp, request->rq_cli_ctx);
571 LASSERT(imp->imp_conn_current);
573 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
575 /* All imports are pingable */
576 spin_lock(&imp->imp_lock);
577 imp->imp_pingable = 1;
579 if (aa->pcaa_initial_connect) {
580 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
581 imp->imp_replayable = 1;
582 spin_unlock(&imp->imp_lock);
583 CDEBUG(D_HA, "connected to replayable target: %s\n",
584 obd2cli_tgt(imp->imp_obd));
586 imp->imp_replayable = 0;
587 spin_unlock(&imp->imp_lock);
590 if (msg_flags & MSG_CONNECT_NEXT_VER) {
591 imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2;
592 CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v2\n",
593 obd2cli_tgt(imp->imp_obd));
595 CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v1\n",
596 obd2cli_tgt(imp->imp_obd));
599 imp->imp_remote_handle =
600 *lustre_msg_get_handle(request->rq_repmsg);
602 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
603 GOTO(finish, rc = 0);
605 spin_unlock(&imp->imp_lock);
608 /* Determine what recovery state to move the import to. */
609 if (MSG_CONNECT_RECONNECT & msg_flags) {
610 memset(&old_hdl, 0, sizeof(old_hdl));
611 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
613 CERROR("%s@%s didn't like our handle "LPX64
614 ", failed\n", obd2cli_tgt(imp->imp_obd),
615 imp->imp_connection->c_remote_uuid.uuid,
616 imp->imp_dlm_handle.cookie);
617 GOTO(out, rc = -ENOTCONN);
620 if (memcmp(&imp->imp_remote_handle,
621 lustre_msg_get_handle(request->rq_repmsg),
622 sizeof(imp->imp_remote_handle))) {
624 /* Old MGC can reconnect to a restarted MGS */
625 if (strcmp(imp->imp_obd->obd_type->typ_name,
626 LUSTRE_MGC_NAME) == 0) {
630 "%s@%s changed handle from "LPX64" to "LPX64
631 "; copying, but this may foreshadow disaster\n",
632 obd2cli_tgt(imp->imp_obd),
633 imp->imp_connection->c_remote_uuid.uuid,
634 imp->imp_remote_handle.cookie,
635 lustre_msg_get_handle(request->rq_repmsg)->
637 imp->imp_remote_handle =
638 *lustre_msg_get_handle(request->rq_repmsg);
640 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
641 obd2cli_tgt(imp->imp_obd),
642 imp->imp_connection->c_remote_uuid.uuid);
645 if (imp->imp_invalid) {
646 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
647 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
648 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
649 imp->imp_obd->obd_name,
650 obd2cli_tgt(imp->imp_obd));
652 spin_lock(&imp->imp_lock);
653 imp->imp_resend_replay = 1;
654 spin_unlock(&imp->imp_lock);
656 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
658 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
660 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
661 LASSERT(imp->imp_replayable);
662 imp->imp_remote_handle =
663 *lustre_msg_get_handle(request->rq_repmsg);
664 imp->imp_last_replay_transno = 0;
665 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
667 imp->imp_remote_handle =
668 *lustre_msg_get_handle(request->rq_repmsg);
669 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
672 /* Sanity checks for a reconnected import. */
673 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
674 CERROR("imp_replayable flag does not match server "
675 "after reconnect. We should LBUG right here.\n");
678 if (lustre_msg_get_last_committed(request->rq_repmsg) <
679 aa->pcaa_peer_committed) {
680 CERROR("%s went back in time (transno "LPD64
681 " was previously committed, server now claims "LPD64
682 ")! See https://bugzilla.clusterfs.com/"
683 "long_list.cgi?buglist=9646\n",
684 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
685 lustre_msg_get_last_committed(request->rq_repmsg));
689 rc = ptlrpc_import_recovery_state_machine(imp);
691 if (rc == -ENOTCONN) {
692 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
693 "invalidating and reconnecting\n",
694 obd2cli_tgt(imp->imp_obd),
695 imp->imp_connection->c_remote_uuid.uuid);
696 ptlrpc_connect_import(imp, NULL);
700 struct obd_connect_data *ocd;
701 struct obd_export *exp;
703 ocd = lustre_swab_repbuf(request, REPLY_REC_OFF, sizeof(*ocd),
704 lustre_swab_connect);
706 spin_lock(&imp->imp_lock);
707 list_del(&imp->imp_conn_current->oic_item);
708 list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list);
709 imp->imp_last_success_conn =
710 imp->imp_conn_current->oic_last_attempt;
713 spin_unlock(&imp->imp_lock);
714 CERROR("Wrong connect data from server\n");
719 imp->imp_connect_data = *ocd;
721 exp = class_conn2export(&imp->imp_dlm_handle);
722 spin_unlock(&imp->imp_lock);
724 /* check that server granted subset of flags we asked for. */
725 LASSERTF((ocd->ocd_connect_flags &
726 imp->imp_connect_flags_orig) ==
727 ocd->ocd_connect_flags, LPX64" != "LPX64,
728 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
731 /* This could happen if export is cleaned during the
733 CERROR("Missing export for %s\n",
734 imp->imp_obd->obd_name);
735 GOTO(out, rc = -ENODEV);
737 exp->exp_connect_flags = ocd->ocd_connect_flags;
738 class_export_put(exp);
740 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
742 if (!ocd->ocd_ibits_known &&
743 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
744 CERROR("Inodebits aware server returned zero compatible"
747 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
748 (ocd->ocd_version > LUSTRE_VERSION_CODE +
749 LUSTRE_VERSION_OFFSET_WARN ||
750 ocd->ocd_version < LUSTRE_VERSION_CODE -
751 LUSTRE_VERSION_OFFSET_WARN)) {
752 /* Sigh, some compilers do not like #ifdef in the middle
753 of macro arguments */
756 "older. Consider upgrading this client";
759 "older. Consider recompiling this application";
761 const char *newer = "newer than client version";
763 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
765 obd2cli_tgt(imp->imp_obd),
766 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
767 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
768 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
769 OBD_OCD_VERSION_FIX(ocd->ocd_version),
770 ocd->ocd_version > LUSTRE_VERSION_CODE ?
771 newer : older, LUSTRE_VERSION_STRING);
774 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
775 cli->cl_max_pages_per_rpc =
776 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
779 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
780 (cli->cl_max_pages_per_rpc > 0));
785 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
786 if (aa->pcaa_initial_connect && !imp->imp_initial_recov)
787 ptlrpc_deactivate_import(imp);
789 if ((imp->imp_recon_bk && imp->imp_last_recon) ||
792 * Give up trying to reconnect
793 * EACCES means client has no permission for connection
795 imp->imp_obd->obd_no_recov = 1;
796 ptlrpc_deactivate_import(imp);
800 struct obd_connect_data *ocd;
802 /* reply message might not be ready */
803 if (request->rq_repmsg != NULL)
806 ocd = lustre_swab_repbuf(request, REPLY_REC_OFF,
808 lustre_swab_connect);
810 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
811 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
812 /* Actually servers are only supposed to refuse
813 connection from liblustre clients, so we should
814 never see this from VFS context */
815 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
817 " refused connection from this client "
818 "with an incompatible version (%s). "
819 "Client must be recompiled\n",
820 obd2cli_tgt(imp->imp_obd),
821 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
822 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
823 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
824 OBD_OCD_VERSION_FIX(ocd->ocd_version),
825 LUSTRE_VERSION_STRING);
826 ptlrpc_deactivate_import(imp);
827 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
832 ptlrpc_maybe_ping_import_soon(imp);
834 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
835 obd2cli_tgt(imp->imp_obd),
836 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
839 spin_lock(&imp->imp_lock);
840 imp->imp_last_recon = 0;
841 spin_unlock(&imp->imp_lock);
843 cfs_waitq_signal(&imp->imp_recovery_waitq);
847 static int completed_replay_interpret(struct ptlrpc_request *req,
851 atomic_dec(&req->rq_import->imp_replay_inflight);
852 if (req->rq_status == 0) {
853 ptlrpc_import_recovery_state_machine(req->rq_import);
855 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
857 req->rq_import->imp_obd->obd_name, req->rq_status);
858 ptlrpc_connect_import(req->rq_import, NULL);
864 static int signal_completed_replay(struct obd_import *imp)
866 struct ptlrpc_request *req;
869 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
870 atomic_inc(&imp->imp_replay_inflight);
872 req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 1, NULL, NULL);
874 atomic_dec(&imp->imp_replay_inflight);
878 ptlrpc_req_set_repsize(req, 1, NULL);
879 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
880 lustre_msg_add_flags(req->rq_reqmsg,
881 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
882 req->rq_timeout *= 3;
883 req->rq_interpret_reply = completed_replay_interpret;
885 ptlrpcd_add_req(req);
890 static int ptlrpc_invalidate_import_thread(void *data)
892 struct obd_import *imp = data;
896 ptlrpc_daemonize("ll_imp_inval");
898 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
899 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
900 imp->imp_connection->c_remote_uuid.uuid);
902 ptlrpc_invalidate_import(imp);
904 if (obd_dump_on_eviction) {
905 CERROR("dump the log upon eviction\n");
906 libcfs_debug_dumplog();
909 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
910 ptlrpc_import_recovery_state_machine(imp);
916 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
924 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
925 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
926 &target_start, &target_len);
927 /* Don't care about MGC eviction */
928 if (strcmp(imp->imp_obd->obd_type->typ_name,
929 LUSTRE_MGC_NAME) != 0) {
930 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
931 "%.*s; in progress operations using "
932 "this service will fail.\n",
933 target_len, target_start);
935 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
936 obd2cli_tgt(imp->imp_obd),
937 imp->imp_connection->c_remote_uuid.uuid);
940 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
941 CLONE_VM | CLONE_FILES);
943 CERROR("error starting invalidate thread: %d\n", rc);
948 ptlrpc_invalidate_import(imp);
950 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
954 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
955 CDEBUG(D_HA, "replay requested by %s\n",
956 obd2cli_tgt(imp->imp_obd));
957 rc = ptlrpc_replay_next(imp, &inflight);
959 atomic_read(&imp->imp_replay_inflight) == 0) {
960 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
961 rc = ldlm_replay_locks(imp);
968 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
969 if (atomic_read(&imp->imp_replay_inflight) == 0) {
970 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
971 rc = signal_completed_replay(imp);
978 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
979 if (atomic_read(&imp->imp_replay_inflight) == 0) {
980 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
984 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
985 CDEBUG(D_HA, "reconnected to %s@%s\n",
986 obd2cli_tgt(imp->imp_obd),
987 imp->imp_connection->c_remote_uuid.uuid);
989 rc = ptlrpc_resend(imp);
992 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
993 ptlrpc_activate_import(imp);
995 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
996 &target_start, &target_len);
997 LCONSOLE_INFO("%s: Connection restored to service %.*s "
998 "using nid %s.\n", imp->imp_obd->obd_name,
999 target_len, target_start,
1000 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1003 if (imp->imp_state == LUSTRE_IMP_FULL) {
1004 cfs_waitq_signal(&imp->imp_recovery_waitq);
1005 ptlrpc_wake_delayed(imp);
1012 static int back_to_sleep(void *unused)
1017 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1019 struct ptlrpc_request *req;
1023 switch (imp->imp_connect_op) {
1024 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1025 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1026 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1028 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1029 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1033 if (ptlrpc_import_in_recovery(imp)) {
1034 struct l_wait_info lwi;
1035 cfs_duration_t timeout;
1036 if (imp->imp_server_timeout)
1037 timeout = cfs_time_seconds(obd_timeout / 2);
1039 timeout = cfs_time_seconds(obd_timeout);
1041 timeout = MAX(timeout * HZ, 1);
1043 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1044 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1045 rc = l_wait_event(imp->imp_recovery_waitq,
1046 !ptlrpc_import_in_recovery(imp), &lwi);
1050 spin_lock(&imp->imp_lock);
1051 if (imp->imp_state != LUSTRE_IMP_FULL)
1054 spin_unlock(&imp->imp_lock);
1056 req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, rq_opc, 1, NULL, NULL);
1058 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1059 * it fails. We can get through the above with a down server
1060 * if the client doesn't know the server is gone yet. */
1061 req->rq_no_resend = 1;
1063 req->rq_timeout = obd_timeout / 3;
1065 req->rq_timeout = 5;
1067 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1068 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1069 ptlrpc_req_set_repsize(req, 1, NULL);
1070 rc = ptlrpc_queue_wait(req);
1071 ptlrpc_req_finished(req);
1074 spin_lock(&imp->imp_lock);
1077 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1079 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1080 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1081 imp->imp_conn_cnt = 0;
1082 imp->imp_last_recon = 0;
1083 spin_unlock(&imp->imp_lock);