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_cksum.h>
38 #include <obd_class.h>
40 #include "ptlrpc_internal.h"
42 struct ptlrpc_connect_async_args {
43 __u64 pcaa_peer_committed;
44 int pcaa_initial_connect;
47 /* A CLOSED import should remain so. */
48 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
50 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
51 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
52 imp, obd2cli_tgt(imp->imp_obd), \
53 ptlrpc_import_state_name(imp->imp_state), \
54 ptlrpc_import_state_name(state)); \
55 imp->imp_state = state; \
59 #define IMPORT_SET_STATE(imp, state) \
61 spin_lock(&imp->imp_lock); \
62 IMPORT_SET_STATE_NOLOCK(imp, state); \
63 spin_unlock(&imp->imp_lock); \
67 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
69 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
71 /* Only this function is allowed to change the import state when it is
72 * CLOSED. I would rather refcount the import and free it after
73 * disconnection like we do with exports. To do that, the client_obd
74 * will need to save the peer info somewhere other than in the import,
76 int ptlrpc_init_import(struct obd_import *imp)
78 spin_lock(&imp->imp_lock);
80 imp->imp_generation++;
81 imp->imp_state = LUSTRE_IMP_NEW;
83 spin_unlock(&imp->imp_lock);
87 EXPORT_SYMBOL(ptlrpc_init_import);
89 #define UUID_STR "_UUID"
90 static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
93 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
94 ? uuid : uuid + strlen(prefix);
96 *uuid_len = strlen(*uuid_start);
98 if (*uuid_len < strlen(UUID_STR))
101 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
102 UUID_STR, strlen(UUID_STR)))
103 *uuid_len -= strlen(UUID_STR);
106 /* Returns true if import was FULL, false if import was already not
108 * @imp - import to be disconnected
109 * @conn_cnt - connection count (epoch) of the request that timed out
110 * and caused the disconnection. In some cases, multiple
111 * inflight requests can fail to a single target (e.g. OST
112 * bulk requests) and if one has already caused a reconnection
113 * (increasing the import->conn_cnt) the older failure should
114 * not also cause a reconnection. If zero it forces a reconnect.
116 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
120 spin_lock(&imp->imp_lock);
122 if (imp->imp_state == LUSTRE_IMP_FULL &&
123 (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
127 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
128 &target_start, &target_len);
130 if (imp->imp_replayable) {
131 LCONSOLE_WARN("%s: Connection to service %.*s via nid "
132 "%s was lost; in progress operations using this "
133 "service will wait for recovery to complete.\n",
134 imp->imp_obd->obd_name, target_len, target_start,
135 libcfs_nid2str(imp->imp_connection->c_peer.nid));
137 LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
138 "%.*s via nid %s was lost; in progress"
139 "operations using this service will"
141 imp->imp_obd->obd_name,
142 target_len, target_start,
143 libcfs_nid2str(imp->imp_connection->c_peer.nid));
145 ptlrpc_deactivate_timeouts(imp);
146 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
147 spin_unlock(&imp->imp_lock);
149 if (obd_dump_on_timeout)
150 libcfs_debug_dumplog();
152 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
155 spin_unlock(&imp->imp_lock);
156 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
157 imp->imp_client->cli_name, imp,
158 (imp->imp_state == LUSTRE_IMP_FULL &&
159 imp->imp_conn_cnt > conn_cnt) ?
160 "reconnected" : "not connected", imp->imp_conn_cnt,
161 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
167 /* Must be called with imp_lock held! */
168 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
171 LASSERT_SPIN_LOCKED(&imp->imp_lock);
173 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
174 imp->imp_invalid = 1;
175 imp->imp_generation++;
176 spin_unlock(&imp->imp_lock);
178 ptlrpc_abort_inflight(imp);
179 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
185 * This acts as a barrier; all existing requests are rejected, and
186 * no new requests will be accepted until the import is valid again.
188 void ptlrpc_deactivate_import(struct obd_import *imp)
190 spin_lock(&imp->imp_lock);
191 ptlrpc_deactivate_and_unlock_import(imp);
195 * This function will invalidate the import, if necessary, then block
196 * for all the RPC completions, and finally notify the obd to
197 * invalidate its state (ie cancel locks, clear pending requests,
200 void ptlrpc_invalidate_import(struct obd_import *imp)
202 struct l_wait_info lwi;
205 atomic_inc(&imp->imp_inval_count);
208 * If this is an invalid MGC connection, then don't bother
209 * waiting for imp_inflight to drop to 0.
211 if (imp->imp_invalid && imp->imp_recon_bk && !imp->imp_obd->obd_no_recov)
214 if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
215 ptlrpc_deactivate_import(imp);
217 LASSERT(imp->imp_invalid);
219 /* wait for all requests to error out and call completion callbacks */
220 lwi = LWI_TIMEOUT_INTERVAL(cfs_timeout_cap(cfs_time_seconds(obd_timeout)),
222 rc = l_wait_event(imp->imp_recovery_waitq,
223 (atomic_read(&imp->imp_inflight) == 0), &lwi);
226 struct list_head *tmp, *n;
227 struct ptlrpc_request *req;
229 CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
230 obd2cli_tgt(imp->imp_obd), rc,
231 atomic_read(&imp->imp_inflight));
232 spin_lock(&imp->imp_lock);
233 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
234 req = list_entry(tmp, struct ptlrpc_request, rq_list);
235 DEBUG_REQ(D_ERROR, req, "still on sending list");
237 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
238 req = list_entry(tmp, struct ptlrpc_request, rq_list);
239 DEBUG_REQ(D_ERROR, req, "still on delayed list");
241 spin_unlock(&imp->imp_lock);
242 LASSERT(atomic_read(&imp->imp_inflight) == 0);
246 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
247 sptlrpc_import_flush_all_ctx(imp);
249 atomic_dec(&imp->imp_inval_count);
250 cfs_waitq_signal(&imp->imp_recovery_waitq);
253 /* unset imp_invalid */
254 void ptlrpc_activate_import(struct obd_import *imp)
256 struct obd_device *obd = imp->imp_obd;
258 spin_lock(&imp->imp_lock);
259 imp->imp_invalid = 0;
260 ptlrpc_activate_timeouts(imp);
261 spin_unlock(&imp->imp_lock);
262 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
265 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
269 LASSERT(!imp->imp_dlm_fake);
271 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
272 if (!imp->imp_replayable) {
273 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
274 "auto-deactivating\n",
275 obd2cli_tgt(imp->imp_obd),
276 imp->imp_connection->c_remote_uuid.uuid,
277 imp->imp_obd->obd_name);
278 ptlrpc_deactivate_import(imp);
281 CDEBUG(D_HA, "%s: waking up pinger\n",
282 obd2cli_tgt(imp->imp_obd));
284 spin_lock(&imp->imp_lock);
285 imp->imp_force_verify = 1;
286 spin_unlock(&imp->imp_lock);
288 ptlrpc_pinger_wake_up();
293 int ptlrpc_reconnect_import(struct obd_import *imp)
296 ptlrpc_set_import_discon(imp, 0);
297 /* Force a new connect attempt */
298 ptlrpc_invalidate_import(imp);
299 /* Do a fresh connect next time by zeroing the handle */
300 ptlrpc_disconnect_import(imp, 1);
301 /* Wait for all invalidate calls to finish */
302 if (atomic_read(&imp->imp_inval_count) > 0) {
304 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
305 rc = l_wait_event(imp->imp_recovery_waitq,
306 (atomic_read(&imp->imp_inval_count) == 0),
309 CERROR("Interrupted, inval=%d\n",
310 atomic_read(&imp->imp_inval_count));
313 /* Allow reconnect attempts */
314 imp->imp_obd->obd_no_recov = 0;
315 /* Remove 'invalid' flag */
316 ptlrpc_activate_import(imp);
317 /* Attempt a new connect */
318 ptlrpc_recover_import(imp, NULL);
322 EXPORT_SYMBOL(ptlrpc_reconnect_import);
324 static int import_select_connection(struct obd_import *imp)
326 struct obd_import_conn *imp_conn = NULL, *conn;
327 struct obd_export *dlmexp;
330 spin_lock(&imp->imp_lock);
332 if (list_empty(&imp->imp_conn_list)) {
333 CERROR("%s: no connections available\n",
334 imp->imp_obd->obd_name);
335 spin_unlock(&imp->imp_lock);
339 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
340 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
341 imp->imp_obd->obd_name,
342 libcfs_nid2str(conn->oic_conn->c_peer.nid),
343 conn->oic_last_attempt);
344 /* Throttle the reconnect rate to once per RECONNECT_INTERVAL */
345 if (cfs_time_before_64(conn->oic_last_attempt +
346 RECONNECT_INTERVAL * HZ,
347 cfs_time_current_64())) {
348 /* If we have never tried this connection since the
349 the last successful attempt, go with this one */
350 if (cfs_time_beforeq_64(conn->oic_last_attempt,
351 imp->imp_last_success_conn)) {
356 /* Both of these connections have already been tried
357 since the last successful connection; just choose the
358 least recently used */
361 else if (cfs_time_before_64(conn->oic_last_attempt,
362 imp_conn->oic_last_attempt))
367 /* if not found, simply choose the current one */
369 LASSERT(imp->imp_conn_current);
370 imp_conn = imp->imp_conn_current;
372 LASSERT(imp_conn->oic_conn);
374 imp_conn->oic_last_attempt = cfs_time_current_64();
376 /* switch connection, don't mind if it's same as the current one */
377 if (imp->imp_connection)
378 ptlrpc_put_connection(imp->imp_connection);
379 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
381 dlmexp = class_conn2export(&imp->imp_dlm_handle);
382 LASSERT(dlmexp != NULL);
383 if (dlmexp->exp_connection)
384 ptlrpc_put_connection(dlmexp->exp_connection);
385 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
386 class_export_put(dlmexp);
388 if (imp->imp_conn_current != imp_conn) {
389 if (imp->imp_conn_current)
390 LCONSOLE_INFO("Changing connection for %s to %s/%s\n",
391 imp->imp_obd->obd_name,
392 imp_conn->oic_uuid.uuid,
393 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
394 imp->imp_conn_current = imp_conn;
397 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
398 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
399 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
401 spin_unlock(&imp->imp_lock);
407 * must be called under imp_lock
409 int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
411 struct ptlrpc_request *req;
412 struct list_head *tmp;
414 if (list_empty(&imp->imp_replay_list))
416 tmp = imp->imp_replay_list.next;
417 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
418 *transno = req->rq_transno;
419 if (req->rq_transno == 0) {
420 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
427 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
429 struct obd_device *obd = imp->imp_obd;
430 int initial_connect = 0;
432 __u64 committed_before_reconnect = 0;
433 struct ptlrpc_request *request;
434 char *bufs[] = { NULL,
435 obd2cli_tgt(imp->imp_obd),
437 (char *)&imp->imp_dlm_handle,
438 (char *)&imp->imp_connect_data };
439 struct ptlrpc_connect_async_args *aa;
443 spin_lock(&imp->imp_lock);
444 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
445 spin_unlock(&imp->imp_lock);
446 CERROR("can't connect to a closed import\n");
448 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
449 spin_unlock(&imp->imp_lock);
450 CERROR("already connected\n");
452 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
453 spin_unlock(&imp->imp_lock);
454 CERROR("already connecting\n");
458 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
461 imp->imp_resend_replay = 0;
463 if (!lustre_handle_is_used(&imp->imp_remote_handle))
466 committed_before_reconnect = imp->imp_peer_committed_transno;
468 set_transno = ptlrpc_first_transno(imp, &imp->imp_connect_data.ocd_transno);
469 spin_unlock(&imp->imp_lock);
472 struct obd_uuid uuid;
474 obd_str2uuid(&uuid, new_uuid);
475 rc = import_set_conn_priority(imp, &uuid);
480 rc = import_select_connection(imp);
484 /* last in connection list */
485 if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
486 if (imp->imp_initial_recov_bk && initial_connect) {
487 CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
488 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
489 /* Don't retry if connect fails */
491 obd_set_info_async(obd->obd_self_export,
492 strlen(KEY_INIT_RECOV),
494 sizeof(rc), &rc, NULL);
496 if (imp->imp_recon_bk) {
497 CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
498 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
499 spin_lock(&imp->imp_lock);
500 imp->imp_last_recon = 1;
501 spin_unlock(&imp->imp_lock);
505 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
509 /* Reset connect flags to the originally requested flags, in case
510 * the server is updated on-the-fly we will get the new features. */
511 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
512 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
513 &obd->obd_uuid, &imp->imp_connect_data);
517 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
519 GOTO(out, rc = -ENOMEM);
521 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
522 imp->imp_connect_op, bufs, NULL);
524 ptlrpc_request_free(request);
529 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
531 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
533 request->rq_send_state = LUSTRE_IMP_CONNECTING;
534 /* Allow a slightly larger reply for future growth compatibility */
535 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
536 sizeof(struct obd_connect_data)+16*sizeof(__u64));
537 ptlrpc_request_set_replen(request);
538 request->rq_interpret_reply = ptlrpc_connect_interpret;
540 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
541 aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
542 memset(aa, 0, sizeof *aa);
544 aa->pcaa_peer_committed = committed_before_reconnect;
545 aa->pcaa_initial_connect = initial_connect;
547 if (aa->pcaa_initial_connect) {
548 spin_lock(&imp->imp_lock);
549 imp->imp_replayable = 1;
550 spin_unlock(&imp->imp_lock);
551 /* On an initial connect, we don't know which one of a
552 failover server pair is up. Don't wait long. */
554 request->rq_timeout = max((int)(obd_timeout / 2), 5);
556 request->rq_timeout = max((int)(obd_timeout / 20), 5);
558 lustre_msg_add_op_flags(request->rq_reqmsg,
559 MSG_CONNECT_INITIAL);
563 lustre_msg_add_op_flags(request->rq_reqmsg,
564 MSG_CONNECT_TRANSNO);
566 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request");
567 ptlrpcd_add_req(request);
571 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
576 EXPORT_SYMBOL(ptlrpc_connect_import);
578 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
581 struct obd_import_conn *imp_conn;
587 spin_lock(&imp->imp_lock);
588 if (list_empty(&imp->imp_conn_list))
592 imp_conn = list_entry(imp->imp_conn_list.prev,
593 struct obd_import_conn,
596 /* XXX: When the failover node is the primary node, it is possible
597 * to have two identical connections in imp_conn_list. We must
598 * compare not conn's pointers but NIDs, otherwise we can defeat
599 * connection throttling. (See bug 14774.) */
600 if (imp->imp_conn_current->oic_conn->c_self !=
601 imp_conn->oic_conn->c_self) {
602 ptlrpc_ping_import_soon(imp);
606 /* liblustre has no pinger thead, so we wakup pinger anyway */
611 spin_unlock(&imp->imp_lock);
614 ptlrpc_pinger_wake_up();
619 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
622 struct ptlrpc_connect_async_args *aa = data;
623 struct obd_import *imp = request->rq_import;
624 struct client_obd *cli = &imp->imp_obd->u.cli;
625 struct lustre_handle old_hdl;
629 spin_lock(&imp->imp_lock);
630 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
631 spin_unlock(&imp->imp_lock);
634 spin_unlock(&imp->imp_lock);
639 LASSERT(imp->imp_conn_current);
641 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
643 /* All imports are pingable */
644 spin_lock(&imp->imp_lock);
645 imp->imp_pingable = 1;
647 if (aa->pcaa_initial_connect) {
648 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
649 imp->imp_replayable = 1;
650 spin_unlock(&imp->imp_lock);
651 CDEBUG(D_HA, "connected to replayable target: %s\n",
652 obd2cli_tgt(imp->imp_obd));
654 imp->imp_replayable = 0;
655 spin_unlock(&imp->imp_lock);
658 /* if applies, adjust the imp->imp_msg_magic here
659 * according to reply flags */
661 imp->imp_remote_handle =
662 *lustre_msg_get_handle(request->rq_repmsg);
664 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
665 spin_lock(&imp->imp_lock);
666 if (imp->imp_invalid) {
667 spin_unlock(&imp->imp_lock);
668 ptlrpc_activate_import(imp);
670 spin_unlock(&imp->imp_lock);
673 GOTO(finish, rc = 0);
675 spin_unlock(&imp->imp_lock);
678 /* Determine what recovery state to move the import to. */
679 if (MSG_CONNECT_RECONNECT & msg_flags) {
680 memset(&old_hdl, 0, sizeof(old_hdl));
681 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
683 CERROR("%s@%s didn't like our handle "LPX64
684 ", failed\n", obd2cli_tgt(imp->imp_obd),
685 imp->imp_connection->c_remote_uuid.uuid,
686 imp->imp_dlm_handle.cookie);
687 GOTO(out, rc = -ENOTCONN);
690 if (memcmp(&imp->imp_remote_handle,
691 lustre_msg_get_handle(request->rq_repmsg),
692 sizeof(imp->imp_remote_handle))) {
694 CWARN("%s@%s changed server handle from "
695 LPX64" to "LPX64" - evicting.\n",
696 obd2cli_tgt(imp->imp_obd),
697 imp->imp_connection->c_remote_uuid.uuid,
698 imp->imp_remote_handle.cookie,
699 lustre_msg_get_handle(request->rq_repmsg)->
701 imp->imp_remote_handle =
702 *lustre_msg_get_handle(request->rq_repmsg);
704 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
705 GOTO(finish, rc = 0);
707 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
708 obd2cli_tgt(imp->imp_obd),
709 imp->imp_connection->c_remote_uuid.uuid);
712 if (imp->imp_invalid) {
713 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
714 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
715 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
716 imp->imp_obd->obd_name,
717 obd2cli_tgt(imp->imp_obd));
719 spin_lock(&imp->imp_lock);
720 imp->imp_resend_replay = 1;
721 spin_unlock(&imp->imp_lock);
723 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
725 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
727 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
728 LASSERT(imp->imp_replayable);
729 imp->imp_remote_handle =
730 *lustre_msg_get_handle(request->rq_repmsg);
731 imp->imp_last_replay_transno = 0;
732 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
734 imp->imp_remote_handle =
735 *lustre_msg_get_handle(request->rq_repmsg);
736 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
739 /* Sanity checks for a reconnected import. */
740 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
741 CERROR("imp_replayable flag does not match server "
742 "after reconnect. We should LBUG right here.\n");
745 if (lustre_msg_get_last_committed(request->rq_repmsg) <
746 aa->pcaa_peer_committed) {
747 CERROR("%s went back in time (transno "LPD64
748 " was previously committed, server now claims "LPD64
749 ")! See https://bugzilla.clusterfs.com/"
750 "long_list.cgi?buglist=9646\n",
751 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
752 lustre_msg_get_last_committed(request->rq_repmsg));
756 rc = ptlrpc_import_recovery_state_machine(imp);
758 if (rc == -ENOTCONN) {
759 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
760 "invalidating and reconnecting\n",
761 obd2cli_tgt(imp->imp_obd),
762 imp->imp_connection->c_remote_uuid.uuid);
763 ptlrpc_connect_import(imp, NULL);
767 struct obd_connect_data *ocd;
768 struct obd_export *exp;
770 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
772 /* server replied obd_connect_data is always bigger */
773 ocd = req_capsule_server_sized_get(&request->rq_pill,
774 &RMF_CONNECT_DATA, ret);
776 spin_lock(&imp->imp_lock);
777 list_del(&imp->imp_conn_current->oic_item);
778 list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list);
779 imp->imp_last_success_conn =
780 imp->imp_conn_current->oic_last_attempt;
783 spin_unlock(&imp->imp_lock);
784 CERROR("Wrong connect data from server\n");
789 imp->imp_connect_data = *ocd;
791 exp = class_conn2export(&imp->imp_dlm_handle);
792 spin_unlock(&imp->imp_lock);
794 /* check that server granted subset of flags we asked for. */
795 LASSERTF((ocd->ocd_connect_flags &
796 imp->imp_connect_flags_orig) ==
797 ocd->ocd_connect_flags, LPX64" != "LPX64,
798 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
801 /* This could happen if export is cleaned during the
803 CERROR("Missing export for %s\n",
804 imp->imp_obd->obd_name);
805 GOTO(out, rc = -ENODEV);
807 exp->exp_connect_flags = ocd->ocd_connect_flags;
808 imp->imp_obd->obd_self_export->exp_connect_flags =
809 ocd->ocd_connect_flags;
810 class_export_put(exp);
812 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
814 if (!ocd->ocd_ibits_known &&
815 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
816 CERROR("Inodebits aware server returned zero compatible"
819 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
820 (ocd->ocd_version > LUSTRE_VERSION_CODE +
821 LUSTRE_VERSION_OFFSET_WARN ||
822 ocd->ocd_version < LUSTRE_VERSION_CODE -
823 LUSTRE_VERSION_OFFSET_WARN)) {
824 /* Sigh, some compilers do not like #ifdef in the middle
825 of macro arguments */
828 "older. Consider upgrading this client";
831 "older. Consider recompiling this application";
833 const char *newer = "newer than client version";
835 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
837 obd2cli_tgt(imp->imp_obd),
838 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
839 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
840 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
841 OBD_OCD_VERSION_FIX(ocd->ocd_version),
842 ocd->ocd_version > LUSTRE_VERSION_CODE ?
843 newer : older, LUSTRE_VERSION_STRING);
846 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
847 /* We sent to the server ocd_cksum_types with bits set
848 * for algorithms we understand. The server masked off
849 * the checksum types it doesn't support */
850 if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
851 LCONSOLE_WARN("The negotiation of the checksum "
852 "alogrithm to use with server %s "
853 "failed (%x/%x), disabling "
855 obd2cli_tgt(imp->imp_obd),
856 ocd->ocd_cksum_types,
858 cli->cl_checksum = 0;
859 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
860 cli->cl_cksum_type = OBD_CKSUM_CRC32;
862 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
864 if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
865 cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
866 else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
867 cli->cl_cksum_type = OBD_CKSUM_ADLER;
869 cli->cl_cksum_type = OBD_CKSUM_CRC32;
872 /* The server does not support OBD_CONNECT_CKSUM.
873 * Enforce CRC32 for backward compatibility*/
874 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
875 cli->cl_cksum_type = OBD_CKSUM_CRC32;
878 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
879 cli->cl_max_pages_per_rpc =
880 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
883 imp->imp_obd->obd_namespace->ns_connect_flags =
884 ocd->ocd_connect_flags;
885 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
886 ocd->ocd_connect_flags;
888 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
889 (cli->cl_max_pages_per_rpc > 0));
894 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
895 spin_lock(&imp->imp_lock);
896 if (aa->pcaa_initial_connect && !imp->imp_initial_recov &&
897 (request->rq_import_generation == imp->imp_generation))
898 ptlrpc_deactivate_and_unlock_import(imp);
900 spin_unlock(&imp->imp_lock);
902 if ((imp->imp_recon_bk && imp->imp_last_recon) ||
905 * Give up trying to reconnect
906 * EACCES means client has no permission for connection
908 imp->imp_obd->obd_no_recov = 1;
909 ptlrpc_deactivate_import(imp);
913 struct obd_connect_data *ocd;
915 /* reply message might not be ready */
916 if (request->rq_repmsg == NULL)
919 ocd = req_capsule_server_get(&request->rq_pill,
922 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
923 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
924 /* Actually servers are only supposed to refuse
925 connection from liblustre clients, so we should
926 never see this from VFS context */
927 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
929 " refused connection from this client "
930 "with an incompatible version (%s). "
931 "Client must be recompiled\n",
932 obd2cli_tgt(imp->imp_obd),
933 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
934 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
935 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
936 OBD_OCD_VERSION_FIX(ocd->ocd_version),
937 LUSTRE_VERSION_STRING);
938 ptlrpc_deactivate_import(imp);
939 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
944 ptlrpc_maybe_ping_import_soon(imp);
946 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
947 obd2cli_tgt(imp->imp_obd),
948 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
951 spin_lock(&imp->imp_lock);
952 imp->imp_last_recon = 0;
953 spin_unlock(&imp->imp_lock);
955 cfs_waitq_signal(&imp->imp_recovery_waitq);
959 static int completed_replay_interpret(struct ptlrpc_request *req,
963 atomic_dec(&req->rq_import->imp_replay_inflight);
964 if (req->rq_status == 0) {
965 ptlrpc_import_recovery_state_machine(req->rq_import);
967 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
969 req->rq_import->imp_obd->obd_name, req->rq_status);
970 ptlrpc_connect_import(req->rq_import, NULL);
976 static int signal_completed_replay(struct obd_import *imp)
978 struct ptlrpc_request *req;
981 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
982 atomic_inc(&imp->imp_replay_inflight);
984 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
987 atomic_dec(&imp->imp_replay_inflight);
991 ptlrpc_request_set_replen(req);
992 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
993 lustre_msg_add_flags(req->rq_reqmsg,
994 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
995 req->rq_timeout *= 3;
996 req->rq_interpret_reply = completed_replay_interpret;
998 ptlrpcd_add_req(req);
1003 static int ptlrpc_invalidate_import_thread(void *data)
1005 struct obd_import *imp = data;
1009 ptlrpc_daemonize("ll_imp_inval");
1011 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1012 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1013 imp->imp_connection->c_remote_uuid.uuid);
1015 ptlrpc_invalidate_import(imp);
1017 if (obd_dump_on_eviction) {
1018 CERROR("dump the log upon eviction\n");
1019 libcfs_debug_dumplog();
1022 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1023 ptlrpc_import_recovery_state_machine(imp);
1029 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1037 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1038 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1039 &target_start, &target_len);
1040 /* Don't care about MGC eviction */
1041 if (strcmp(imp->imp_obd->obd_type->typ_name,
1042 LUSTRE_MGC_NAME) != 0) {
1043 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
1044 "%.*s; in progress operations using "
1045 "this service will fail.\n",
1046 target_len, target_start);
1048 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1049 obd2cli_tgt(imp->imp_obd),
1050 imp->imp_connection->c_remote_uuid.uuid);
1053 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
1054 CLONE_VM | CLONE_FILES);
1056 CERROR("error starting invalidate thread: %d\n", rc);
1061 ptlrpc_invalidate_import(imp);
1063 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1067 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1068 CDEBUG(D_HA, "replay requested by %s\n",
1069 obd2cli_tgt(imp->imp_obd));
1070 rc = ptlrpc_replay_next(imp, &inflight);
1071 if (inflight == 0 &&
1072 atomic_read(&imp->imp_replay_inflight) == 0) {
1073 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1074 rc = ldlm_replay_locks(imp);
1081 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1082 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1083 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1084 rc = signal_completed_replay(imp);
1091 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1092 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1093 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1097 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1098 CDEBUG(D_HA, "reconnected to %s@%s\n",
1099 obd2cli_tgt(imp->imp_obd),
1100 imp->imp_connection->c_remote_uuid.uuid);
1102 rc = ptlrpc_resend(imp);
1105 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1106 ptlrpc_activate_import(imp);
1108 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1109 &target_start, &target_len);
1110 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1111 "using nid %s.\n", imp->imp_obd->obd_name,
1112 target_len, target_start,
1113 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1116 if (imp->imp_state == LUSTRE_IMP_FULL) {
1117 cfs_waitq_signal(&imp->imp_recovery_waitq);
1118 ptlrpc_wake_delayed(imp);
1125 static int back_to_sleep(void *unused)
1130 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1132 struct ptlrpc_request *req;
1134 int nowait = imp->imp_obd->obd_force;
1138 GOTO(set_state, rc);
1140 switch (imp->imp_connect_op) {
1141 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1142 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1143 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1145 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1146 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1150 if (ptlrpc_import_in_recovery(imp)) {
1151 struct l_wait_info lwi;
1152 cfs_duration_t timeout;
1153 if (imp->imp_server_timeout)
1154 timeout = cfs_time_seconds(obd_timeout / 2);
1156 timeout = cfs_time_seconds(obd_timeout);
1158 timeout = MAX(timeout * HZ, 1);
1160 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1161 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1162 rc = l_wait_event(imp->imp_recovery_waitq,
1163 !ptlrpc_import_in_recovery(imp), &lwi);
1167 spin_lock(&imp->imp_lock);
1168 if (imp->imp_state != LUSTRE_IMP_FULL)
1171 spin_unlock(&imp->imp_lock);
1173 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1174 LUSTRE_OBD_VERSION, rq_opc);
1176 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1177 * it fails. We can get through the above with a down server
1178 * if the client doesn't know the server is gone yet. */
1179 req->rq_no_resend = 1;
1181 req->rq_timeout = obd_timeout / 3;
1183 req->rq_timeout = 5;
1185 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1186 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1187 ptlrpc_request_set_replen(req);
1188 rc = ptlrpc_queue_wait(req);
1189 ptlrpc_req_finished(req);
1193 spin_lock(&imp->imp_lock);
1196 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1198 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1199 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1200 imp->imp_conn_cnt = 0;
1201 imp->imp_last_recon = 0;
1202 spin_unlock(&imp->imp_lock);