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));
166 /* Must be called with imp_lock held! */
167 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
170 LASSERT_SPIN_LOCKED(&imp->imp_lock);
172 if (imp->imp_invalid) {
173 spin_unlock(&imp->imp_lock);
178 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
179 imp->imp_invalid = 1;
180 imp->imp_generation++;
181 spin_unlock(&imp->imp_lock);
183 ptlrpc_abort_inflight(imp);
184 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
190 * This acts as a barrier; all existing requests are rejected, and
191 * no new requests will be accepted until the import is valid again.
193 void ptlrpc_deactivate_import(struct obd_import *imp)
195 spin_lock(&imp->imp_lock);
196 ptlrpc_deactivate_and_unlock_import(imp);
200 * This function will invalidate the import, if necessary, then block
201 * for all the RPC completions, and finally notify the obd to
202 * invalidate its state (ie cancel locks, clear pending requests,
205 void ptlrpc_invalidate_import(struct obd_import *imp)
207 struct l_wait_info lwi;
210 atomic_inc(&imp->imp_inval_count);
212 ptlrpc_deactivate_import(imp);
214 LASSERT(imp->imp_invalid);
216 /* wait for all requests to error out and call completion callbacks */
217 lwi = LWI_TIMEOUT_INTERVAL(cfs_timeout_cap(cfs_time_seconds(obd_timeout)),
219 rc = l_wait_event(imp->imp_recovery_waitq,
220 (atomic_read(&imp->imp_inflight) == 0), &lwi);
223 CDEBUG(D_HA, "%s: rc = %d waiting for callback (%d != 0)\n",
224 obd2cli_tgt(imp->imp_obd), rc,
225 atomic_read(&imp->imp_inflight));
227 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
228 sptlrpc_import_flush_all_ctx(imp);
230 atomic_dec(&imp->imp_inval_count);
231 cfs_waitq_signal(&imp->imp_recovery_waitq);
234 /* unset imp_invalid */
235 void ptlrpc_activate_import(struct obd_import *imp)
237 struct obd_device *obd = imp->imp_obd;
239 spin_lock(&imp->imp_lock);
240 imp->imp_invalid = 0;
241 ptlrpc_activate_timeouts(imp);
242 spin_unlock(&imp->imp_lock);
243 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
246 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
250 LASSERT(!imp->imp_dlm_fake);
252 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
253 if (!imp->imp_replayable) {
254 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
255 "auto-deactivating\n",
256 obd2cli_tgt(imp->imp_obd),
257 imp->imp_connection->c_remote_uuid.uuid,
258 imp->imp_obd->obd_name);
259 ptlrpc_deactivate_import(imp);
262 CDEBUG(D_HA, "%s: waking up pinger\n",
263 obd2cli_tgt(imp->imp_obd));
265 spin_lock(&imp->imp_lock);
266 imp->imp_force_verify = 1;
267 spin_unlock(&imp->imp_lock);
269 ptlrpc_pinger_wake_up();
274 static int import_select_connection(struct obd_import *imp)
276 struct obd_import_conn *imp_conn = NULL, *conn;
277 struct obd_export *dlmexp;
280 spin_lock(&imp->imp_lock);
282 if (list_empty(&imp->imp_conn_list)) {
283 CERROR("%s: no connections available\n",
284 imp->imp_obd->obd_name);
285 spin_unlock(&imp->imp_lock);
289 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
290 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
291 imp->imp_obd->obd_name,
292 libcfs_nid2str(conn->oic_conn->c_peer.nid),
293 conn->oic_last_attempt);
294 /* Throttle the reconnect rate to once per RECONNECT_INTERVAL */
295 if (cfs_time_before_64(conn->oic_last_attempt +
296 RECONNECT_INTERVAL * HZ,
297 cfs_time_current_64())) {
298 /* If we have never tried this connection since the
299 the last successful attempt, go with this one */
300 if (cfs_time_beforeq_64(conn->oic_last_attempt,
301 imp->imp_last_success_conn)) {
306 /* Both of these connections have already been tried
307 since the last successful connection; just choose the
308 least recently used */
311 else if (cfs_time_before_64(conn->oic_last_attempt,
312 imp_conn->oic_last_attempt))
317 /* if not found, simply choose the current one */
319 LASSERT(imp->imp_conn_current);
320 imp_conn = imp->imp_conn_current;
322 LASSERT(imp_conn->oic_conn);
324 imp_conn->oic_last_attempt = cfs_time_current_64();
326 /* switch connection, don't mind if it's same as the current one */
327 if (imp->imp_connection)
328 ptlrpc_put_connection(imp->imp_connection);
329 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
331 dlmexp = class_conn2export(&imp->imp_dlm_handle);
332 LASSERT(dlmexp != NULL);
333 if (dlmexp->exp_connection)
334 ptlrpc_put_connection(dlmexp->exp_connection);
335 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
336 class_export_put(dlmexp);
338 if (imp->imp_conn_current != imp_conn) {
339 if (imp->imp_conn_current)
340 LCONSOLE_INFO("Changing connection for %s to %s/%s\n",
341 imp->imp_obd->obd_name,
342 imp_conn->oic_uuid.uuid,
343 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
344 imp->imp_conn_current = imp_conn;
347 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
348 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
349 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
351 spin_unlock(&imp->imp_lock);
357 * must be called under imp_lock
359 int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
361 struct ptlrpc_request *req;
362 struct list_head *tmp;
364 if (list_empty(&imp->imp_replay_list))
366 tmp = imp->imp_replay_list.next;
367 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
368 *transno = req->rq_transno;
369 if (req->rq_transno == 0) {
370 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
377 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
379 struct obd_device *obd = imp->imp_obd;
380 int initial_connect = 0;
382 __u64 committed_before_reconnect = 0;
383 struct ptlrpc_request *request;
384 char *bufs[] = { NULL,
385 obd2cli_tgt(imp->imp_obd),
387 (char *)&imp->imp_dlm_handle,
388 (char *)&imp->imp_connect_data };
389 struct ptlrpc_connect_async_args *aa;
393 spin_lock(&imp->imp_lock);
394 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
395 spin_unlock(&imp->imp_lock);
396 CERROR("can't connect to a closed import\n");
398 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
399 spin_unlock(&imp->imp_lock);
400 CERROR("already connected\n");
402 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
403 spin_unlock(&imp->imp_lock);
404 CERROR("already connecting\n");
408 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
411 imp->imp_resend_replay = 0;
413 if (!lustre_handle_is_used(&imp->imp_remote_handle))
416 committed_before_reconnect = imp->imp_peer_committed_transno;
418 set_transno = ptlrpc_first_transno(imp, &imp->imp_connect_data.ocd_transno);
419 spin_unlock(&imp->imp_lock);
422 struct obd_uuid uuid;
424 obd_str2uuid(&uuid, new_uuid);
425 rc = import_set_conn_priority(imp, &uuid);
430 rc = import_select_connection(imp);
434 /* last in connection list */
435 if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
436 if (imp->imp_initial_recov_bk && initial_connect) {
437 CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
438 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
439 /* Don't retry if connect fails */
441 obd_set_info_async(obd->obd_self_export,
442 strlen(KEY_INIT_RECOV),
444 sizeof(rc), &rc, NULL);
446 if (imp->imp_recon_bk) {
447 CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
448 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
449 spin_lock(&imp->imp_lock);
450 imp->imp_last_recon = 1;
451 spin_unlock(&imp->imp_lock);
455 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
459 /* Reset connect flags to the originally requested flags, in case
460 * the server is updated on-the-fly we will get the new features. */
461 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
462 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
463 &obd->obd_uuid, &imp->imp_connect_data);
467 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
469 GOTO(out, rc = -ENOMEM);
471 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
472 imp->imp_connect_op, bufs, NULL);
474 ptlrpc_request_free(request);
479 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
481 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
483 request->rq_send_state = LUSTRE_IMP_CONNECTING;
484 /* Allow a slightly larger reply for future growth compatibility */
485 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
486 sizeof(struct obd_connect_data)+16*sizeof(__u64));
487 ptlrpc_request_set_replen(request);
488 request->rq_interpret_reply = ptlrpc_connect_interpret;
490 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
491 aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
492 memset(aa, 0, sizeof *aa);
494 aa->pcaa_peer_committed = committed_before_reconnect;
495 aa->pcaa_initial_connect = initial_connect;
497 if (aa->pcaa_initial_connect) {
498 spin_lock(&imp->imp_lock);
499 imp->imp_replayable = 1;
500 spin_unlock(&imp->imp_lock);
501 /* On an initial connect, we don't know which one of a
502 failover server pair is up. Don't wait long. */
504 request->rq_timeout = max((int)(obd_timeout / 2), 5);
506 request->rq_timeout = max((int)(obd_timeout / 20), 5);
508 lustre_msg_add_op_flags(request->rq_reqmsg,
509 MSG_CONNECT_INITIAL);
513 lustre_msg_add_op_flags(request->rq_reqmsg,
514 MSG_CONNECT_TRANSNO);
516 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request");
517 ptlrpcd_add_req(request);
521 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
526 EXPORT_SYMBOL(ptlrpc_connect_import);
528 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
531 struct obd_import_conn *imp_conn;
537 spin_lock(&imp->imp_lock);
538 if (list_empty(&imp->imp_conn_list))
542 imp_conn = list_entry(imp->imp_conn_list.prev,
543 struct obd_import_conn,
546 /* XXX: When the failover node is the primary node, it is possible
547 * to have two identical connections in imp_conn_list. We must
548 * compare not conn's pointers but NIDs, otherwise we can defeat
549 * connection throttling. (See bug 14774.) */
550 if (imp->imp_conn_current->oic_conn->c_self !=
551 imp_conn->oic_conn->c_self) {
552 ptlrpc_ping_import_soon(imp);
556 /* liblustre has no pinger thead, so we wakup pinger anyway */
561 spin_unlock(&imp->imp_lock);
564 ptlrpc_pinger_wake_up();
569 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
572 struct ptlrpc_connect_async_args *aa = data;
573 struct obd_import *imp = request->rq_import;
574 struct client_obd *cli = &imp->imp_obd->u.cli;
575 struct lustre_handle old_hdl;
579 spin_lock(&imp->imp_lock);
580 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
581 spin_unlock(&imp->imp_lock);
584 spin_unlock(&imp->imp_lock);
589 LASSERT(imp->imp_conn_current);
591 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
593 /* All imports are pingable */
594 spin_lock(&imp->imp_lock);
595 imp->imp_pingable = 1;
597 if (aa->pcaa_initial_connect) {
598 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
599 imp->imp_replayable = 1;
600 spin_unlock(&imp->imp_lock);
601 CDEBUG(D_HA, "connected to replayable target: %s\n",
602 obd2cli_tgt(imp->imp_obd));
604 imp->imp_replayable = 0;
605 spin_unlock(&imp->imp_lock);
608 if (msg_flags & MSG_CONNECT_NEXT_VER) {
609 imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2;
610 CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v2\n",
611 obd2cli_tgt(imp->imp_obd));
613 CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v1\n",
614 obd2cli_tgt(imp->imp_obd));
617 imp->imp_remote_handle =
618 *lustre_msg_get_handle(request->rq_repmsg);
620 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
621 ptlrpc_activate_import(imp);
622 GOTO(finish, rc = 0);
624 spin_unlock(&imp->imp_lock);
627 /* Determine what recovery state to move the import to. */
628 if (MSG_CONNECT_RECONNECT & msg_flags) {
629 memset(&old_hdl, 0, sizeof(old_hdl));
630 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
632 CERROR("%s@%s didn't like our handle "LPX64
633 ", failed\n", obd2cli_tgt(imp->imp_obd),
634 imp->imp_connection->c_remote_uuid.uuid,
635 imp->imp_dlm_handle.cookie);
636 GOTO(out, rc = -ENOTCONN);
639 if (memcmp(&imp->imp_remote_handle,
640 lustre_msg_get_handle(request->rq_repmsg),
641 sizeof(imp->imp_remote_handle))) {
643 CWARN("%s@%s changed server handle from "
644 LPX64" to "LPX64" - evicting.\n",
645 obd2cli_tgt(imp->imp_obd),
646 imp->imp_connection->c_remote_uuid.uuid,
647 imp->imp_remote_handle.cookie,
648 lustre_msg_get_handle(request->rq_repmsg)->
650 imp->imp_remote_handle =
651 *lustre_msg_get_handle(request->rq_repmsg);
653 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
654 GOTO(finish, rc = 0);
656 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
657 obd2cli_tgt(imp->imp_obd),
658 imp->imp_connection->c_remote_uuid.uuid);
661 if (imp->imp_invalid) {
662 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
663 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
664 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
665 imp->imp_obd->obd_name,
666 obd2cli_tgt(imp->imp_obd));
668 spin_lock(&imp->imp_lock);
669 imp->imp_resend_replay = 1;
670 spin_unlock(&imp->imp_lock);
672 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
674 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
676 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
677 LASSERT(imp->imp_replayable);
678 imp->imp_remote_handle =
679 *lustre_msg_get_handle(request->rq_repmsg);
680 imp->imp_last_replay_transno = 0;
681 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
683 imp->imp_remote_handle =
684 *lustre_msg_get_handle(request->rq_repmsg);
685 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
688 /* Sanity checks for a reconnected import. */
689 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
690 CERROR("imp_replayable flag does not match server "
691 "after reconnect. We should LBUG right here.\n");
694 if (lustre_msg_get_last_committed(request->rq_repmsg) <
695 aa->pcaa_peer_committed) {
696 CERROR("%s went back in time (transno "LPD64
697 " was previously committed, server now claims "LPD64
698 ")! See https://bugzilla.clusterfs.com/"
699 "long_list.cgi?buglist=9646\n",
700 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
701 lustre_msg_get_last_committed(request->rq_repmsg));
705 rc = ptlrpc_import_recovery_state_machine(imp);
707 if (rc == -ENOTCONN) {
708 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
709 "invalidating and reconnecting\n",
710 obd2cli_tgt(imp->imp_obd),
711 imp->imp_connection->c_remote_uuid.uuid);
712 ptlrpc_connect_import(imp, NULL);
716 struct obd_connect_data *ocd;
717 struct obd_export *exp;
719 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
721 /* server replied obd_connect_data is always bigger */
722 ocd = req_capsule_server_sized_get(&request->rq_pill,
723 &RMF_CONNECT_DATA, ret);
725 spin_lock(&imp->imp_lock);
726 list_del(&imp->imp_conn_current->oic_item);
727 list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list);
728 imp->imp_last_success_conn =
729 imp->imp_conn_current->oic_last_attempt;
732 spin_unlock(&imp->imp_lock);
733 CERROR("Wrong connect data from server\n");
738 imp->imp_connect_data = *ocd;
740 exp = class_conn2export(&imp->imp_dlm_handle);
741 spin_unlock(&imp->imp_lock);
743 /* check that server granted subset of flags we asked for. */
744 LASSERTF((ocd->ocd_connect_flags &
745 imp->imp_connect_flags_orig) ==
746 ocd->ocd_connect_flags, LPX64" != "LPX64,
747 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
750 /* This could happen if export is cleaned during the
752 CERROR("Missing export for %s\n",
753 imp->imp_obd->obd_name);
754 GOTO(out, rc = -ENODEV);
756 exp->exp_connect_flags = ocd->ocd_connect_flags;
757 imp->imp_obd->obd_self_export->exp_connect_flags =
758 ocd->ocd_connect_flags;
759 class_export_put(exp);
761 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
763 if (!ocd->ocd_ibits_known &&
764 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
765 CERROR("Inodebits aware server returned zero compatible"
768 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
769 (ocd->ocd_version > LUSTRE_VERSION_CODE +
770 LUSTRE_VERSION_OFFSET_WARN ||
771 ocd->ocd_version < LUSTRE_VERSION_CODE -
772 LUSTRE_VERSION_OFFSET_WARN)) {
773 /* Sigh, some compilers do not like #ifdef in the middle
774 of macro arguments */
777 "older. Consider upgrading this client";
780 "older. Consider recompiling this application";
782 const char *newer = "newer than client version";
784 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
786 obd2cli_tgt(imp->imp_obd),
787 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
788 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
789 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
790 OBD_OCD_VERSION_FIX(ocd->ocd_version),
791 ocd->ocd_version > LUSTRE_VERSION_CODE ?
792 newer : older, LUSTRE_VERSION_STRING);
795 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
796 cli->cl_max_pages_per_rpc =
797 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
800 imp->imp_obd->obd_namespace->ns_connect_flags =
801 ocd->ocd_connect_flags;
802 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
803 ocd->ocd_connect_flags;
805 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
806 (cli->cl_max_pages_per_rpc > 0));
811 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
812 spin_lock(&imp->imp_lock);
813 if (aa->pcaa_initial_connect && !imp->imp_initial_recov &&
814 (request->rq_import_generation == imp->imp_generation))
815 ptlrpc_deactivate_and_unlock_import(imp);
817 spin_unlock(&imp->imp_lock);
819 if ((imp->imp_recon_bk && imp->imp_last_recon) ||
822 * Give up trying to reconnect
823 * EACCES means client has no permission for connection
825 imp->imp_obd->obd_no_recov = 1;
826 ptlrpc_deactivate_import(imp);
830 struct obd_connect_data *ocd;
832 /* reply message might not be ready */
833 if (request->rq_repmsg == NULL)
836 ocd = req_capsule_server_get(&request->rq_pill,
839 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
840 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
841 /* Actually servers are only supposed to refuse
842 connection from liblustre clients, so we should
843 never see this from VFS context */
844 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
846 " refused connection from this client "
847 "with an incompatible version (%s). "
848 "Client must be recompiled\n",
849 obd2cli_tgt(imp->imp_obd),
850 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
851 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
852 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
853 OBD_OCD_VERSION_FIX(ocd->ocd_version),
854 LUSTRE_VERSION_STRING);
855 ptlrpc_deactivate_import(imp);
856 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
861 ptlrpc_maybe_ping_import_soon(imp);
863 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
864 obd2cli_tgt(imp->imp_obd),
865 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
868 spin_lock(&imp->imp_lock);
869 imp->imp_last_recon = 0;
870 spin_unlock(&imp->imp_lock);
872 cfs_waitq_signal(&imp->imp_recovery_waitq);
876 static int completed_replay_interpret(struct ptlrpc_request *req,
880 atomic_dec(&req->rq_import->imp_replay_inflight);
881 if (req->rq_status == 0) {
882 ptlrpc_import_recovery_state_machine(req->rq_import);
884 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
886 req->rq_import->imp_obd->obd_name, req->rq_status);
887 ptlrpc_connect_import(req->rq_import, NULL);
893 static int signal_completed_replay(struct obd_import *imp)
895 struct ptlrpc_request *req;
898 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
899 atomic_inc(&imp->imp_replay_inflight);
901 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
904 atomic_dec(&imp->imp_replay_inflight);
908 ptlrpc_request_set_replen(req);
909 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
910 lustre_msg_add_flags(req->rq_reqmsg,
911 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
912 req->rq_timeout *= 3;
913 req->rq_interpret_reply = completed_replay_interpret;
915 ptlrpcd_add_req(req);
920 static int ptlrpc_invalidate_import_thread(void *data)
922 struct obd_import *imp = data;
926 ptlrpc_daemonize("ll_imp_inval");
928 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
929 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
930 imp->imp_connection->c_remote_uuid.uuid);
932 ptlrpc_invalidate_import(imp);
934 if (obd_dump_on_eviction) {
935 CERROR("dump the log upon eviction\n");
936 libcfs_debug_dumplog();
939 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
940 ptlrpc_import_recovery_state_machine(imp);
946 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
954 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
955 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
956 &target_start, &target_len);
957 /* Don't care about MGC eviction */
958 if (strcmp(imp->imp_obd->obd_type->typ_name,
959 LUSTRE_MGC_NAME) != 0) {
960 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
961 "%.*s; in progress operations using "
962 "this service will fail.\n",
963 target_len, target_start);
965 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
966 obd2cli_tgt(imp->imp_obd),
967 imp->imp_connection->c_remote_uuid.uuid);
970 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
971 CLONE_VM | CLONE_FILES);
973 CERROR("error starting invalidate thread: %d\n", rc);
978 ptlrpc_invalidate_import(imp);
980 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
984 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
985 CDEBUG(D_HA, "replay requested by %s\n",
986 obd2cli_tgt(imp->imp_obd));
987 rc = ptlrpc_replay_next(imp, &inflight);
989 atomic_read(&imp->imp_replay_inflight) == 0) {
990 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
991 rc = ldlm_replay_locks(imp);
998 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
999 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1000 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1001 rc = signal_completed_replay(imp);
1008 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1009 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1010 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1014 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1015 CDEBUG(D_HA, "reconnected to %s@%s\n",
1016 obd2cli_tgt(imp->imp_obd),
1017 imp->imp_connection->c_remote_uuid.uuid);
1019 rc = ptlrpc_resend(imp);
1022 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1023 ptlrpc_activate_import(imp);
1025 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1026 &target_start, &target_len);
1027 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1028 "using nid %s.\n", imp->imp_obd->obd_name,
1029 target_len, target_start,
1030 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1033 if (imp->imp_state == LUSTRE_IMP_FULL) {
1034 cfs_waitq_signal(&imp->imp_recovery_waitq);
1035 ptlrpc_wake_delayed(imp);
1042 static int back_to_sleep(void *unused)
1047 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1049 struct ptlrpc_request *req;
1051 int nowait = imp->imp_obd->obd_force;
1055 GOTO(set_state, rc);
1057 switch (imp->imp_connect_op) {
1058 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1059 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1060 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1062 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1063 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1067 if (ptlrpc_import_in_recovery(imp)) {
1068 struct l_wait_info lwi;
1069 cfs_duration_t timeout;
1070 if (imp->imp_server_timeout)
1071 timeout = cfs_time_seconds(obd_timeout / 2);
1073 timeout = cfs_time_seconds(obd_timeout);
1075 timeout = MAX(timeout * HZ, 1);
1077 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1078 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1079 rc = l_wait_event(imp->imp_recovery_waitq,
1080 !ptlrpc_import_in_recovery(imp), &lwi);
1084 spin_lock(&imp->imp_lock);
1085 if (imp->imp_state != LUSTRE_IMP_FULL)
1088 spin_unlock(&imp->imp_lock);
1090 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1091 LUSTRE_OBD_VERSION, rq_opc);
1093 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1094 * it fails. We can get through the above with a down server
1095 * if the client doesn't know the server is gone yet. */
1096 req->rq_no_resend = 1;
1098 req->rq_timeout = obd_timeout / 3;
1100 req->rq_timeout = 5;
1102 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1103 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1104 ptlrpc_request_set_replen(req);
1105 rc = ptlrpc_queue_wait(req);
1106 ptlrpc_req_finished(req);
1110 spin_lock(&imp->imp_lock);
1113 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1115 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1116 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1117 imp->imp_conn_cnt = 0;
1118 imp->imp_last_recon = 0;
1119 spin_unlock(&imp->imp_lock);