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 if (imp->imp_invalid) {
174 spin_unlock(&imp->imp_lock);
179 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
180 imp->imp_invalid = 1;
181 imp->imp_generation++;
182 spin_unlock(&imp->imp_lock);
184 ptlrpc_abort_inflight(imp);
185 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
191 * This acts as a barrier; all existing requests are rejected, and
192 * no new requests will be accepted until the import is valid again.
194 void ptlrpc_deactivate_import(struct obd_import *imp)
196 spin_lock(&imp->imp_lock);
197 ptlrpc_deactivate_and_unlock_import(imp);
201 * This function will invalidate the import, if necessary, then block
202 * for all the RPC completions, and finally notify the obd to
203 * invalidate its state (ie cancel locks, clear pending requests,
206 void ptlrpc_invalidate_import(struct obd_import *imp)
208 struct l_wait_info lwi;
211 atomic_inc(&imp->imp_inval_count);
213 ptlrpc_deactivate_import(imp);
215 LASSERT(imp->imp_invalid);
217 /* wait for all requests to error out and call completion callbacks */
218 lwi = LWI_TIMEOUT_INTERVAL(cfs_timeout_cap(cfs_time_seconds(obd_timeout)),
220 rc = l_wait_event(imp->imp_recovery_waitq,
221 (atomic_read(&imp->imp_inflight) == 0), &lwi);
224 CDEBUG(D_HA, "%s: rc = %d waiting for callback (%d != 0)\n",
225 obd2cli_tgt(imp->imp_obd), rc,
226 atomic_read(&imp->imp_inflight));
228 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
229 sptlrpc_import_flush_all_ctx(imp);
231 atomic_dec(&imp->imp_inval_count);
232 cfs_waitq_signal(&imp->imp_recovery_waitq);
235 /* unset imp_invalid */
236 void ptlrpc_activate_import(struct obd_import *imp)
238 struct obd_device *obd = imp->imp_obd;
240 spin_lock(&imp->imp_lock);
241 imp->imp_invalid = 0;
242 ptlrpc_activate_timeouts(imp);
243 spin_unlock(&imp->imp_lock);
244 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
247 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
251 LASSERT(!imp->imp_dlm_fake);
253 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
254 if (!imp->imp_replayable) {
255 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
256 "auto-deactivating\n",
257 obd2cli_tgt(imp->imp_obd),
258 imp->imp_connection->c_remote_uuid.uuid,
259 imp->imp_obd->obd_name);
260 ptlrpc_deactivate_import(imp);
263 CDEBUG(D_HA, "%s: waking up pinger\n",
264 obd2cli_tgt(imp->imp_obd));
266 spin_lock(&imp->imp_lock);
267 imp->imp_force_verify = 1;
268 spin_unlock(&imp->imp_lock);
270 ptlrpc_pinger_wake_up();
275 int ptlrpc_reconnect_import(struct obd_import *imp)
278 ptlrpc_set_import_discon(imp, 0);
279 /* Force a new connect attempt */
280 ptlrpc_invalidate_import(imp);
281 /* Do a fresh connect next time by zeroing the handle */
282 ptlrpc_disconnect_import(imp, 1);
283 /* Wait for all invalidate calls to finish */
284 if (atomic_read(&imp->imp_inval_count) > 0) {
286 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
287 rc = l_wait_event(imp->imp_recovery_waitq,
288 (atomic_read(&imp->imp_inval_count) == 0),
291 CERROR("Interrupted, inval=%d\n",
292 atomic_read(&imp->imp_inval_count));
295 /* Allow reconnect attempts */
296 imp->imp_obd->obd_no_recov = 0;
297 /* Remove 'invalid' flag */
298 ptlrpc_activate_import(imp);
299 /* Attempt a new connect */
300 ptlrpc_recover_import(imp, NULL);
304 EXPORT_SYMBOL(ptlrpc_reconnect_import);
306 static int import_select_connection(struct obd_import *imp)
308 struct obd_import_conn *imp_conn = NULL, *conn;
309 struct obd_export *dlmexp;
312 spin_lock(&imp->imp_lock);
314 if (list_empty(&imp->imp_conn_list)) {
315 CERROR("%s: no connections available\n",
316 imp->imp_obd->obd_name);
317 spin_unlock(&imp->imp_lock);
321 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
322 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
323 imp->imp_obd->obd_name,
324 libcfs_nid2str(conn->oic_conn->c_peer.nid),
325 conn->oic_last_attempt);
326 /* Throttle the reconnect rate to once per RECONNECT_INTERVAL */
327 if (cfs_time_before_64(conn->oic_last_attempt +
328 RECONNECT_INTERVAL * HZ,
329 cfs_time_current_64())) {
330 /* If we have never tried this connection since the
331 the last successful attempt, go with this one */
332 if (cfs_time_beforeq_64(conn->oic_last_attempt,
333 imp->imp_last_success_conn)) {
338 /* Both of these connections have already been tried
339 since the last successful connection; just choose the
340 least recently used */
343 else if (cfs_time_before_64(conn->oic_last_attempt,
344 imp_conn->oic_last_attempt))
349 /* if not found, simply choose the current one */
351 LASSERT(imp->imp_conn_current);
352 imp_conn = imp->imp_conn_current;
354 LASSERT(imp_conn->oic_conn);
356 imp_conn->oic_last_attempt = cfs_time_current_64();
358 /* switch connection, don't mind if it's same as the current one */
359 if (imp->imp_connection)
360 ptlrpc_put_connection(imp->imp_connection);
361 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
363 dlmexp = class_conn2export(&imp->imp_dlm_handle);
364 LASSERT(dlmexp != NULL);
365 if (dlmexp->exp_connection)
366 ptlrpc_put_connection(dlmexp->exp_connection);
367 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
368 class_export_put(dlmexp);
370 if (imp->imp_conn_current != imp_conn) {
371 if (imp->imp_conn_current)
372 LCONSOLE_INFO("Changing connection for %s to %s/%s\n",
373 imp->imp_obd->obd_name,
374 imp_conn->oic_uuid.uuid,
375 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
376 imp->imp_conn_current = imp_conn;
379 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
380 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
381 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
383 spin_unlock(&imp->imp_lock);
389 * must be called under imp_lock
391 int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
393 struct ptlrpc_request *req;
394 struct list_head *tmp;
396 if (list_empty(&imp->imp_replay_list))
398 tmp = imp->imp_replay_list.next;
399 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
400 *transno = req->rq_transno;
401 if (req->rq_transno == 0) {
402 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
409 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
411 struct obd_device *obd = imp->imp_obd;
412 int initial_connect = 0;
414 __u64 committed_before_reconnect = 0;
415 struct ptlrpc_request *request;
416 char *bufs[] = { NULL,
417 obd2cli_tgt(imp->imp_obd),
419 (char *)&imp->imp_dlm_handle,
420 (char *)&imp->imp_connect_data };
421 struct ptlrpc_connect_async_args *aa;
425 spin_lock(&imp->imp_lock);
426 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
427 spin_unlock(&imp->imp_lock);
428 CERROR("can't connect to a closed import\n");
430 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
431 spin_unlock(&imp->imp_lock);
432 CERROR("already connected\n");
434 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
435 spin_unlock(&imp->imp_lock);
436 CERROR("already connecting\n");
440 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
443 imp->imp_resend_replay = 0;
445 if (!lustre_handle_is_used(&imp->imp_remote_handle))
448 committed_before_reconnect = imp->imp_peer_committed_transno;
450 set_transno = ptlrpc_first_transno(imp, &imp->imp_connect_data.ocd_transno);
451 spin_unlock(&imp->imp_lock);
454 struct obd_uuid uuid;
456 obd_str2uuid(&uuid, new_uuid);
457 rc = import_set_conn_priority(imp, &uuid);
462 rc = import_select_connection(imp);
466 /* last in connection list */
467 if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
468 if (imp->imp_initial_recov_bk && initial_connect) {
469 CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
470 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
471 /* Don't retry if connect fails */
473 obd_set_info_async(obd->obd_self_export,
474 strlen(KEY_INIT_RECOV),
476 sizeof(rc), &rc, NULL);
478 if (imp->imp_recon_bk) {
479 CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
480 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
481 spin_lock(&imp->imp_lock);
482 imp->imp_last_recon = 1;
483 spin_unlock(&imp->imp_lock);
487 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
491 /* Reset connect flags to the originally requested flags, in case
492 * the server is updated on-the-fly we will get the new features. */
493 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
494 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
495 &obd->obd_uuid, &imp->imp_connect_data);
499 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
501 GOTO(out, rc = -ENOMEM);
503 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
504 imp->imp_connect_op, bufs, NULL);
506 ptlrpc_request_free(request);
511 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
513 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
515 request->rq_send_state = LUSTRE_IMP_CONNECTING;
516 /* Allow a slightly larger reply for future growth compatibility */
517 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
518 sizeof(struct obd_connect_data)+16*sizeof(__u64));
519 ptlrpc_request_set_replen(request);
520 request->rq_interpret_reply = ptlrpc_connect_interpret;
522 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
523 aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
524 memset(aa, 0, sizeof *aa);
526 aa->pcaa_peer_committed = committed_before_reconnect;
527 aa->pcaa_initial_connect = initial_connect;
529 if (aa->pcaa_initial_connect) {
530 spin_lock(&imp->imp_lock);
531 imp->imp_replayable = 1;
532 spin_unlock(&imp->imp_lock);
533 /* On an initial connect, we don't know which one of a
534 failover server pair is up. Don't wait long. */
536 request->rq_timeout = max((int)(obd_timeout / 2), 5);
538 request->rq_timeout = max((int)(obd_timeout / 20), 5);
540 lustre_msg_add_op_flags(request->rq_reqmsg,
541 MSG_CONNECT_INITIAL);
545 lustre_msg_add_op_flags(request->rq_reqmsg,
546 MSG_CONNECT_TRANSNO);
548 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request");
549 ptlrpcd_add_req(request);
553 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
558 EXPORT_SYMBOL(ptlrpc_connect_import);
560 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
563 struct obd_import_conn *imp_conn;
569 spin_lock(&imp->imp_lock);
570 if (list_empty(&imp->imp_conn_list))
574 imp_conn = list_entry(imp->imp_conn_list.prev,
575 struct obd_import_conn,
578 /* XXX: When the failover node is the primary node, it is possible
579 * to have two identical connections in imp_conn_list. We must
580 * compare not conn's pointers but NIDs, otherwise we can defeat
581 * connection throttling. (See bug 14774.) */
582 if (imp->imp_conn_current->oic_conn->c_self !=
583 imp_conn->oic_conn->c_self) {
584 ptlrpc_ping_import_soon(imp);
588 /* liblustre has no pinger thead, so we wakup pinger anyway */
593 spin_unlock(&imp->imp_lock);
596 ptlrpc_pinger_wake_up();
601 static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
604 struct ptlrpc_connect_async_args *aa = data;
605 struct obd_import *imp = request->rq_import;
606 struct client_obd *cli = &imp->imp_obd->u.cli;
607 struct lustre_handle old_hdl;
611 spin_lock(&imp->imp_lock);
612 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
613 spin_unlock(&imp->imp_lock);
616 spin_unlock(&imp->imp_lock);
621 LASSERT(imp->imp_conn_current);
623 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
625 /* All imports are pingable */
626 spin_lock(&imp->imp_lock);
627 imp->imp_pingable = 1;
629 if (aa->pcaa_initial_connect) {
630 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
631 imp->imp_replayable = 1;
632 spin_unlock(&imp->imp_lock);
633 CDEBUG(D_HA, "connected to replayable target: %s\n",
634 obd2cli_tgt(imp->imp_obd));
636 imp->imp_replayable = 0;
637 spin_unlock(&imp->imp_lock);
640 /* if applies, adjust the imp->imp_msg_magic here
641 * according to reply flags */
643 imp->imp_remote_handle =
644 *lustre_msg_get_handle(request->rq_repmsg);
646 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
647 ptlrpc_activate_import(imp);
648 GOTO(finish, rc = 0);
650 spin_unlock(&imp->imp_lock);
653 /* Determine what recovery state to move the import to. */
654 if (MSG_CONNECT_RECONNECT & msg_flags) {
655 memset(&old_hdl, 0, sizeof(old_hdl));
656 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
658 CERROR("%s@%s didn't like our handle "LPX64
659 ", failed\n", obd2cli_tgt(imp->imp_obd),
660 imp->imp_connection->c_remote_uuid.uuid,
661 imp->imp_dlm_handle.cookie);
662 GOTO(out, rc = -ENOTCONN);
665 if (memcmp(&imp->imp_remote_handle,
666 lustre_msg_get_handle(request->rq_repmsg),
667 sizeof(imp->imp_remote_handle))) {
669 CWARN("%s@%s changed server handle from "
670 LPX64" to "LPX64" - evicting.\n",
671 obd2cli_tgt(imp->imp_obd),
672 imp->imp_connection->c_remote_uuid.uuid,
673 imp->imp_remote_handle.cookie,
674 lustre_msg_get_handle(request->rq_repmsg)->
676 imp->imp_remote_handle =
677 *lustre_msg_get_handle(request->rq_repmsg);
679 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
680 GOTO(finish, rc = 0);
682 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
683 obd2cli_tgt(imp->imp_obd),
684 imp->imp_connection->c_remote_uuid.uuid);
687 if (imp->imp_invalid) {
688 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
689 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
690 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
691 imp->imp_obd->obd_name,
692 obd2cli_tgt(imp->imp_obd));
694 spin_lock(&imp->imp_lock);
695 imp->imp_resend_replay = 1;
696 spin_unlock(&imp->imp_lock);
698 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
700 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
702 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
703 LASSERT(imp->imp_replayable);
704 imp->imp_remote_handle =
705 *lustre_msg_get_handle(request->rq_repmsg);
706 imp->imp_last_replay_transno = 0;
707 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
709 imp->imp_remote_handle =
710 *lustre_msg_get_handle(request->rq_repmsg);
711 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
714 /* Sanity checks for a reconnected import. */
715 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
716 CERROR("imp_replayable flag does not match server "
717 "after reconnect. We should LBUG right here.\n");
720 if (lustre_msg_get_last_committed(request->rq_repmsg) <
721 aa->pcaa_peer_committed) {
722 CERROR("%s went back in time (transno "LPD64
723 " was previously committed, server now claims "LPD64
724 ")! See https://bugzilla.clusterfs.com/"
725 "long_list.cgi?buglist=9646\n",
726 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
727 lustre_msg_get_last_committed(request->rq_repmsg));
731 rc = ptlrpc_import_recovery_state_machine(imp);
733 if (rc == -ENOTCONN) {
734 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
735 "invalidating and reconnecting\n",
736 obd2cli_tgt(imp->imp_obd),
737 imp->imp_connection->c_remote_uuid.uuid);
738 ptlrpc_connect_import(imp, NULL);
742 struct obd_connect_data *ocd;
743 struct obd_export *exp;
745 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
747 /* server replied obd_connect_data is always bigger */
748 ocd = req_capsule_server_sized_get(&request->rq_pill,
749 &RMF_CONNECT_DATA, ret);
751 spin_lock(&imp->imp_lock);
752 list_del(&imp->imp_conn_current->oic_item);
753 list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list);
754 imp->imp_last_success_conn =
755 imp->imp_conn_current->oic_last_attempt;
758 spin_unlock(&imp->imp_lock);
759 CERROR("Wrong connect data from server\n");
764 imp->imp_connect_data = *ocd;
766 exp = class_conn2export(&imp->imp_dlm_handle);
767 spin_unlock(&imp->imp_lock);
769 /* check that server granted subset of flags we asked for. */
770 LASSERTF((ocd->ocd_connect_flags &
771 imp->imp_connect_flags_orig) ==
772 ocd->ocd_connect_flags, LPX64" != "LPX64,
773 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
776 /* This could happen if export is cleaned during the
778 CERROR("Missing export for %s\n",
779 imp->imp_obd->obd_name);
780 GOTO(out, rc = -ENODEV);
782 exp->exp_connect_flags = ocd->ocd_connect_flags;
783 imp->imp_obd->obd_self_export->exp_connect_flags =
784 ocd->ocd_connect_flags;
785 class_export_put(exp);
787 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
789 if (!ocd->ocd_ibits_known &&
790 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
791 CERROR("Inodebits aware server returned zero compatible"
794 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
795 (ocd->ocd_version > LUSTRE_VERSION_CODE +
796 LUSTRE_VERSION_OFFSET_WARN ||
797 ocd->ocd_version < LUSTRE_VERSION_CODE -
798 LUSTRE_VERSION_OFFSET_WARN)) {
799 /* Sigh, some compilers do not like #ifdef in the middle
800 of macro arguments */
803 "older. Consider upgrading this client";
806 "older. Consider recompiling this application";
808 const char *newer = "newer than client version";
810 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
812 obd2cli_tgt(imp->imp_obd),
813 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
814 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
815 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
816 OBD_OCD_VERSION_FIX(ocd->ocd_version),
817 ocd->ocd_version > LUSTRE_VERSION_CODE ?
818 newer : older, LUSTRE_VERSION_STRING);
821 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
822 /* We sent to the server ocd_cksum_types with bits set
823 * for algorithms we understand. The server masked off
824 * the checksum types it doesn't support */
825 if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
826 LCONSOLE_WARN("The negotiation of the checksum "
827 "alogrithm to use with server %s "
828 "failed (%x/%x), disabling "
830 obd2cli_tgt(imp->imp_obd),
831 ocd->ocd_cksum_types,
833 cli->cl_checksum = 0;
834 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
835 cli->cl_cksum_type = OBD_CKSUM_CRC32;
837 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
839 if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
840 cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
841 else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
842 cli->cl_cksum_type = OBD_CKSUM_ADLER;
844 cli->cl_cksum_type = OBD_CKSUM_CRC32;
847 /* The server does not support OBD_CONNECT_CKSUM.
848 * Enforce CRC32 for backward compatibility*/
849 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
850 cli->cl_cksum_type = OBD_CKSUM_CRC32;
853 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
854 cli->cl_max_pages_per_rpc =
855 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
858 imp->imp_obd->obd_namespace->ns_connect_flags =
859 ocd->ocd_connect_flags;
860 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
861 ocd->ocd_connect_flags;
863 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
864 (cli->cl_max_pages_per_rpc > 0));
869 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
870 spin_lock(&imp->imp_lock);
871 if (aa->pcaa_initial_connect && !imp->imp_initial_recov &&
872 (request->rq_import_generation == imp->imp_generation))
873 ptlrpc_deactivate_and_unlock_import(imp);
875 spin_unlock(&imp->imp_lock);
877 if ((imp->imp_recon_bk && imp->imp_last_recon) ||
880 * Give up trying to reconnect
881 * EACCES means client has no permission for connection
883 imp->imp_obd->obd_no_recov = 1;
884 ptlrpc_deactivate_import(imp);
888 struct obd_connect_data *ocd;
890 /* reply message might not be ready */
891 if (request->rq_repmsg == NULL)
894 ocd = req_capsule_server_get(&request->rq_pill,
897 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
898 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
899 /* Actually servers are only supposed to refuse
900 connection from liblustre clients, so we should
901 never see this from VFS context */
902 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
904 " refused connection from this client "
905 "with an incompatible version (%s). "
906 "Client must be recompiled\n",
907 obd2cli_tgt(imp->imp_obd),
908 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
909 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
910 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
911 OBD_OCD_VERSION_FIX(ocd->ocd_version),
912 LUSTRE_VERSION_STRING);
913 ptlrpc_deactivate_import(imp);
914 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
919 ptlrpc_maybe_ping_import_soon(imp);
921 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
922 obd2cli_tgt(imp->imp_obd),
923 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
926 spin_lock(&imp->imp_lock);
927 imp->imp_last_recon = 0;
928 spin_unlock(&imp->imp_lock);
930 cfs_waitq_signal(&imp->imp_recovery_waitq);
934 static int completed_replay_interpret(struct ptlrpc_request *req,
938 atomic_dec(&req->rq_import->imp_replay_inflight);
939 if (req->rq_status == 0) {
940 ptlrpc_import_recovery_state_machine(req->rq_import);
942 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
944 req->rq_import->imp_obd->obd_name, req->rq_status);
945 ptlrpc_connect_import(req->rq_import, NULL);
951 static int signal_completed_replay(struct obd_import *imp)
953 struct ptlrpc_request *req;
956 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
957 atomic_inc(&imp->imp_replay_inflight);
959 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
962 atomic_dec(&imp->imp_replay_inflight);
966 ptlrpc_request_set_replen(req);
967 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
968 lustre_msg_add_flags(req->rq_reqmsg,
969 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
970 req->rq_timeout *= 3;
971 req->rq_interpret_reply = completed_replay_interpret;
973 ptlrpcd_add_req(req);
978 static int ptlrpc_invalidate_import_thread(void *data)
980 struct obd_import *imp = data;
984 ptlrpc_daemonize("ll_imp_inval");
986 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
987 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
988 imp->imp_connection->c_remote_uuid.uuid);
990 ptlrpc_invalidate_import(imp);
992 if (obd_dump_on_eviction) {
993 CERROR("dump the log upon eviction\n");
994 libcfs_debug_dumplog();
997 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
998 ptlrpc_import_recovery_state_machine(imp);
1004 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1012 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1013 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1014 &target_start, &target_len);
1015 /* Don't care about MGC eviction */
1016 if (strcmp(imp->imp_obd->obd_type->typ_name,
1017 LUSTRE_MGC_NAME) != 0) {
1018 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
1019 "%.*s; in progress operations using "
1020 "this service will fail.\n",
1021 target_len, target_start);
1023 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1024 obd2cli_tgt(imp->imp_obd),
1025 imp->imp_connection->c_remote_uuid.uuid);
1028 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
1029 CLONE_VM | CLONE_FILES);
1031 CERROR("error starting invalidate thread: %d\n", rc);
1036 ptlrpc_invalidate_import(imp);
1038 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1042 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1043 CDEBUG(D_HA, "replay requested by %s\n",
1044 obd2cli_tgt(imp->imp_obd));
1045 rc = ptlrpc_replay_next(imp, &inflight);
1046 if (inflight == 0 &&
1047 atomic_read(&imp->imp_replay_inflight) == 0) {
1048 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1049 rc = ldlm_replay_locks(imp);
1056 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1057 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1058 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1059 rc = signal_completed_replay(imp);
1066 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1067 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1068 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1072 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1073 CDEBUG(D_HA, "reconnected to %s@%s\n",
1074 obd2cli_tgt(imp->imp_obd),
1075 imp->imp_connection->c_remote_uuid.uuid);
1077 rc = ptlrpc_resend(imp);
1080 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1081 ptlrpc_activate_import(imp);
1083 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1084 &target_start, &target_len);
1085 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1086 "using nid %s.\n", imp->imp_obd->obd_name,
1087 target_len, target_start,
1088 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1091 if (imp->imp_state == LUSTRE_IMP_FULL) {
1092 cfs_waitq_signal(&imp->imp_recovery_waitq);
1093 ptlrpc_wake_delayed(imp);
1100 static int back_to_sleep(void *unused)
1105 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1107 struct ptlrpc_request *req;
1109 int nowait = imp->imp_obd->obd_force;
1113 GOTO(set_state, rc);
1115 switch (imp->imp_connect_op) {
1116 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1117 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1118 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1120 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1121 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1125 if (ptlrpc_import_in_recovery(imp)) {
1126 struct l_wait_info lwi;
1127 cfs_duration_t timeout;
1128 if (imp->imp_server_timeout)
1129 timeout = cfs_time_seconds(obd_timeout / 2);
1131 timeout = cfs_time_seconds(obd_timeout);
1133 timeout = MAX(timeout * HZ, 1);
1135 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1136 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1137 rc = l_wait_event(imp->imp_recovery_waitq,
1138 !ptlrpc_import_in_recovery(imp), &lwi);
1142 spin_lock(&imp->imp_lock);
1143 if (imp->imp_state != LUSTRE_IMP_FULL)
1146 spin_unlock(&imp->imp_lock);
1148 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1149 LUSTRE_OBD_VERSION, rq_opc);
1151 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1152 * it fails. We can get through the above with a down server
1153 * if the client doesn't know the server is gone yet. */
1154 req->rq_no_resend = 1;
1156 req->rq_timeout = obd_timeout / 3;
1158 req->rq_timeout = 5;
1160 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1161 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1162 ptlrpc_request_set_replen(req);
1163 rc = ptlrpc_queue_wait(req);
1164 ptlrpc_req_finished(req);
1168 spin_lock(&imp->imp_lock);
1171 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1173 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1174 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1175 imp->imp_conn_cnt = 0;
1176 imp->imp_last_recon = 0;
1177 spin_unlock(&imp->imp_lock);