1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ptlrpc/import.c
38 * Author: Mike Shaver <shaver@clusterfs.com>
41 #define DEBUG_SUBSYSTEM S_RPC
43 # include <liblustre.h>
46 #include <obd_support.h>
47 #include <lustre_ha.h>
48 #include <lustre_net.h>
49 #include <lustre_import.h>
50 #include <lustre_export.h>
52 #include <obd_cksum.h>
53 #include <obd_class.h>
55 #include "ptlrpc_internal.h"
57 struct ptlrpc_connect_async_args {
58 __u64 pcaa_peer_committed;
59 int pcaa_initial_connect;
62 /* A CLOSED import should remain so. */
63 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
65 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
66 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
67 imp, obd2cli_tgt(imp->imp_obd), \
68 ptlrpc_import_state_name(imp->imp_state), \
69 ptlrpc_import_state_name(state)); \
70 imp->imp_state = state; \
74 #define IMPORT_SET_STATE(imp, state) \
76 spin_lock(&imp->imp_lock); \
77 IMPORT_SET_STATE_NOLOCK(imp, state); \
78 spin_unlock(&imp->imp_lock); \
82 static int ptlrpc_connect_interpret(const struct lu_env *env,
83 struct ptlrpc_request *request,
85 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
87 /* Only this function is allowed to change the import state when it is
88 * CLOSED. I would rather refcount the import and free it after
89 * disconnection like we do with exports. To do that, the client_obd
90 * will need to save the peer info somewhere other than in the import,
92 int ptlrpc_init_import(struct obd_import *imp)
94 spin_lock(&imp->imp_lock);
96 imp->imp_generation++;
97 imp->imp_state = LUSTRE_IMP_NEW;
99 spin_unlock(&imp->imp_lock);
103 EXPORT_SYMBOL(ptlrpc_init_import);
105 #define UUID_STR "_UUID"
106 static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
109 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
110 ? uuid : uuid + strlen(prefix);
112 *uuid_len = strlen(*uuid_start);
114 if (*uuid_len < strlen(UUID_STR))
117 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
118 UUID_STR, strlen(UUID_STR)))
119 *uuid_len -= strlen(UUID_STR);
122 /* Returns true if import was FULL, false if import was already not
124 * @imp - import to be disconnected
125 * @conn_cnt - connection count (epoch) of the request that timed out
126 * and caused the disconnection. In some cases, multiple
127 * inflight requests can fail to a single target (e.g. OST
128 * bulk requests) and if one has already caused a reconnection
129 * (increasing the import->conn_cnt) the older failure should
130 * not also cause a reconnection. If zero it forces a reconnect.
132 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
136 spin_lock(&imp->imp_lock);
138 if (imp->imp_state == LUSTRE_IMP_FULL &&
139 (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
143 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
144 &target_start, &target_len);
146 if (imp->imp_replayable) {
147 LCONSOLE_WARN("%s: Connection to service %.*s via nid "
148 "%s was lost; in progress operations using this "
149 "service will wait for recovery to complete.\n",
150 imp->imp_obd->obd_name, target_len, target_start,
151 libcfs_nid2str(imp->imp_connection->c_peer.nid));
153 LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
154 "%.*s via nid %s was lost; in progress "
155 "operations using this service will fail.\n",
156 imp->imp_obd->obd_name,
157 target_len, target_start,
158 libcfs_nid2str(imp->imp_connection->c_peer.nid));
160 ptlrpc_deactivate_timeouts(imp);
161 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
162 spin_unlock(&imp->imp_lock);
164 if (obd_dump_on_timeout)
165 libcfs_debug_dumplog();
167 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
170 spin_unlock(&imp->imp_lock);
171 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
172 imp->imp_client->cli_name, imp,
173 (imp->imp_state == LUSTRE_IMP_FULL &&
174 imp->imp_conn_cnt > conn_cnt) ?
175 "reconnected" : "not connected", imp->imp_conn_cnt,
176 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
182 /* Must be called with imp_lock held! */
183 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
186 LASSERT_SPIN_LOCKED(&imp->imp_lock);
188 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
189 imp->imp_invalid = 1;
190 imp->imp_generation++;
191 spin_unlock(&imp->imp_lock);
193 ptlrpc_abort_inflight(imp);
194 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
200 * This acts as a barrier; all existing requests are rejected, and
201 * no new requests will be accepted until the import is valid again.
203 void ptlrpc_deactivate_import(struct obd_import *imp)
205 spin_lock(&imp->imp_lock);
206 ptlrpc_deactivate_and_unlock_import(imp);
210 ptlrpc_inflight_deadline(struct ptlrpc_request *req, time_t now)
214 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
215 (req->rq_phase == RQ_PHASE_BULK) ||
216 (req->rq_phase == RQ_PHASE_NEW)))
219 if (req->rq_timedout)
222 if (req->rq_phase == RQ_PHASE_NEW)
225 dl = req->rq_deadline;
233 static unsigned int ptlrpc_inflight_timeout(struct obd_import *imp)
235 time_t now = cfs_time_current_sec();
236 struct list_head *tmp, *n;
237 struct ptlrpc_request *req;
238 unsigned int timeout = 0;
240 spin_lock(&imp->imp_lock);
241 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
242 req = list_entry(tmp, struct ptlrpc_request, rq_list);
243 timeout = max(ptlrpc_inflight_deadline(req, now), timeout);
245 spin_unlock(&imp->imp_lock);
250 * This function will invalidate the import, if necessary, then block
251 * for all the RPC completions, and finally notify the obd to
252 * invalidate its state (ie cancel locks, clear pending requests,
255 void ptlrpc_invalidate_import(struct obd_import *imp)
257 struct list_head *tmp, *n;
258 struct ptlrpc_request *req;
259 struct l_wait_info lwi;
260 unsigned int timeout;
263 atomic_inc(&imp->imp_inval_count);
266 * If this is an invalid MGC connection, then don't bother
267 * waiting for imp_inflight to drop to 0.
269 if (imp->imp_invalid && imp->imp_recon_bk &&!imp->imp_obd->obd_no_recov)
272 if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
273 ptlrpc_deactivate_import(imp);
275 LASSERT(imp->imp_invalid);
277 /* Wait forever until inflight == 0. We really can't do it another
278 * way because in some cases we need to wait for very long reply
279 * unlink. We can't do anything before that because there is really
280 * no guarantee that some rdma transfer is not in progress right now. */
282 /* Calculate max timeout for waiting on rpcs to error
283 * out. Use obd_timeout if calculated value is smaller
285 timeout = ptlrpc_inflight_timeout(imp);
286 timeout += timeout / 3;
289 timeout = obd_timeout;
291 CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n",
294 /* Wait for all requests to error out and call completion
295 * callbacks. Cap it at obd_timeout -- these should all
296 * have been locally cancelled by ptlrpc_abort_inflight. */
297 lwi = LWI_TIMEOUT_INTERVAL(
298 cfs_timeout_cap(cfs_time_seconds(timeout)),
299 cfs_time_seconds(1), NULL, NULL);
300 rc = l_wait_event(imp->imp_recovery_waitq,
301 (atomic_read(&imp->imp_inflight) == 0), &lwi);
303 const char *cli_tgt = obd2cli_tgt(imp->imp_obd);
305 CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
306 cli_tgt, rc, atomic_read(&imp->imp_inflight));
308 spin_lock(&imp->imp_lock);
309 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
310 req = list_entry(tmp, struct ptlrpc_request,
312 DEBUG_REQ(D_ERROR, req,"still on sending list");
314 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
315 req = list_entry(tmp, struct ptlrpc_request,
317 DEBUG_REQ(D_ERROR, req,"still on delayed list");
320 if (atomic_read(&imp->imp_unregistering) == 0) {
321 /* XXX: This is temporary workaround for long
322 * connect interpret due to locking in lov in
323 * in import activation path, which causes
324 * connect rpc stay on sending list longer
325 * time. Let's wait longer insread of asserting
328 * Activation should not be blocking. Kill
329 * this #if 0 when activation code is fixed. */
331 /* We know that only "unregistering" rpcs may
332 * still survive in sending or delaying lists
333 * (They are waiting for long reply unlink in
334 * sluggish nets). Let's check this. If there
335 * is no unregistering and inflight != 0 this
337 LASSERT(atomic_read(&imp->imp_inflight) == 0);
339 /* Let's save one loop as soon as inflight have
340 * dropped to zero. No new inflights possible at
345 CERROR("%s: RPCs in \"%s\" phase found (%d). "
346 "Network is sluggish? Waiting them "
347 "to error out.\n", cli_tgt,
348 ptlrpc_phase2str(RQ_PHASE_UNREGISTERING),
349 atomic_read(&imp->imp_unregistering));
351 spin_unlock(&imp->imp_lock);
356 * Let's additionally check that no new rpcs added to import in
357 * "invalidate" state.
359 LASSERT(atomic_read(&imp->imp_inflight) == 0);
361 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
362 sptlrpc_import_flush_all_ctx(imp);
364 atomic_dec(&imp->imp_inval_count);
365 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
368 /* unset imp_invalid */
369 void ptlrpc_activate_import(struct obd_import *imp)
371 struct obd_device *obd = imp->imp_obd;
373 spin_lock(&imp->imp_lock);
374 imp->imp_invalid = 0;
375 ptlrpc_activate_timeouts(imp);
376 spin_unlock(&imp->imp_lock);
377 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
380 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
384 LASSERT(!imp->imp_dlm_fake);
386 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
387 if (!imp->imp_replayable) {
388 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
389 "auto-deactivating\n",
390 obd2cli_tgt(imp->imp_obd),
391 imp->imp_connection->c_remote_uuid.uuid,
392 imp->imp_obd->obd_name);
393 ptlrpc_deactivate_import(imp);
396 CDEBUG(D_HA, "%s: waking up pinger\n",
397 obd2cli_tgt(imp->imp_obd));
399 spin_lock(&imp->imp_lock);
400 imp->imp_force_verify = 1;
401 spin_unlock(&imp->imp_lock);
403 ptlrpc_pinger_wake_up();
408 int ptlrpc_reconnect_import(struct obd_import *imp)
410 ptlrpc_set_import_discon(imp, 0);
411 /* Force a new connect attempt */
412 ptlrpc_invalidate_import(imp);
413 /* Do a fresh connect next time by zeroing the handle */
414 ptlrpc_disconnect_import(imp, 1);
415 /* Wait for all invalidate calls to finish */
416 if (atomic_read(&imp->imp_inval_count) > 0) {
418 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
419 rc = l_wait_event(imp->imp_recovery_waitq,
420 (atomic_read(&imp->imp_inval_count) == 0),
423 CERROR("Interrupted, inval=%d\n",
424 atomic_read(&imp->imp_inval_count));
427 /* Allow reconnect attempts */
428 imp->imp_obd->obd_no_recov = 0;
429 /* Remove 'invalid' flag */
430 ptlrpc_activate_import(imp);
431 /* Attempt a new connect */
432 ptlrpc_recover_import(imp, NULL);
436 EXPORT_SYMBOL(ptlrpc_reconnect_import);
438 static int import_select_connection(struct obd_import *imp)
440 struct obd_import_conn *imp_conn = NULL, *conn;
441 struct obd_export *dlmexp;
445 spin_lock(&imp->imp_lock);
447 if (list_empty(&imp->imp_conn_list)) {
448 CERROR("%s: no connections available\n",
449 imp->imp_obd->obd_name);
450 spin_unlock(&imp->imp_lock);
454 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
455 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
456 imp->imp_obd->obd_name,
457 libcfs_nid2str(conn->oic_conn->c_peer.nid),
458 conn->oic_last_attempt);
459 /* Don't thrash connections */
460 if (cfs_time_before_64(cfs_time_current_64(),
461 conn->oic_last_attempt +
462 cfs_time_seconds(CONNECTION_SWITCH_MIN))) {
466 /* If we have not tried this connection since the
467 the last successful attempt, go with this one */
468 if ((conn->oic_last_attempt == 0) ||
469 cfs_time_beforeq_64(conn->oic_last_attempt,
470 imp->imp_last_success_conn)) {
476 /* If all of the connections have already been tried
477 since the last successful connection; just choose the
478 least recently used */
481 else if (cfs_time_before_64(conn->oic_last_attempt,
482 imp_conn->oic_last_attempt))
486 /* if not found, simply choose the current one */
488 LASSERT(imp->imp_conn_current);
489 imp_conn = imp->imp_conn_current;
492 LASSERT(imp_conn->oic_conn);
494 /* If we've tried everything, and we're back to the beginning of the
495 list, increase our timeout and try again. It will be reset when
496 we do finally connect. (FIXME: really we should wait for all network
497 state associated with the last connection attempt to drain before
498 trying to reconnect on it.) */
499 if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item) &&
500 !imp->imp_recon_bk /* not retrying */) {
501 if (at_get(&imp->imp_at.iat_net_latency) <
502 CONNECTION_SWITCH_MAX) {
503 at_add(&imp->imp_at.iat_net_latency,
504 at_get(&imp->imp_at.iat_net_latency) +
505 CONNECTION_SWITCH_INC);
507 LASSERT(imp_conn->oic_last_attempt);
508 CWARN("%s: tried all connections, increasing latency to %ds\n",
509 imp->imp_obd->obd_name,
510 at_get(&imp->imp_at.iat_net_latency));
513 imp_conn->oic_last_attempt = cfs_time_current_64();
515 /* switch connection, don't mind if it's same as the current one */
516 if (imp->imp_connection)
517 ptlrpc_connection_put(imp->imp_connection);
518 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
520 dlmexp = class_conn2export(&imp->imp_dlm_handle);
521 LASSERT(dlmexp != NULL);
522 if (dlmexp->exp_connection)
523 ptlrpc_connection_put(dlmexp->exp_connection);
524 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
525 class_export_put(dlmexp);
527 if (imp->imp_conn_current != imp_conn) {
528 if (imp->imp_conn_current)
529 LCONSOLE_INFO("Changing connection for %s to %s/%s\n",
530 imp->imp_obd->obd_name,
531 imp_conn->oic_uuid.uuid,
532 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
533 imp->imp_conn_current = imp_conn;
536 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
537 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
538 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
540 spin_unlock(&imp->imp_lock);
546 * must be called under imp_lock
548 static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
550 struct ptlrpc_request *req;
551 struct list_head *tmp;
553 if (list_empty(&imp->imp_replay_list))
555 tmp = imp->imp_replay_list.next;
556 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
557 *transno = req->rq_transno;
558 if (req->rq_transno == 0) {
559 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
566 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
568 struct obd_device *obd = imp->imp_obd;
569 int initial_connect = 0;
571 __u64 committed_before_reconnect = 0;
572 struct ptlrpc_request *request;
573 char *bufs[] = { NULL,
574 obd2cli_tgt(imp->imp_obd),
576 (char *)&imp->imp_dlm_handle,
577 (char *)&imp->imp_connect_data };
578 struct ptlrpc_connect_async_args *aa;
582 spin_lock(&imp->imp_lock);
583 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
584 spin_unlock(&imp->imp_lock);
585 CERROR("can't connect to a closed import\n");
587 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
588 spin_unlock(&imp->imp_lock);
589 CERROR("already connected\n");
591 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
592 spin_unlock(&imp->imp_lock);
593 CERROR("already connecting\n");
597 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
600 imp->imp_resend_replay = 0;
602 if (!lustre_handle_is_used(&imp->imp_remote_handle))
605 committed_before_reconnect = imp->imp_peer_committed_transno;
607 set_transno = ptlrpc_first_transno(imp,
608 &imp->imp_connect_data.ocd_transno);
609 spin_unlock(&imp->imp_lock);
612 struct obd_uuid uuid;
614 obd_str2uuid(&uuid, new_uuid);
615 rc = import_set_conn_priority(imp, &uuid);
620 rc = import_select_connection(imp);
624 /* last in connection list */
625 if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
626 if (imp->imp_initial_recov_bk && initial_connect) {
627 CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
628 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
629 /* Don't retry if connect fails */
631 obd_set_info_async(obd->obd_self_export,
632 sizeof(KEY_INIT_RECOV),
634 sizeof(rc), &rc, NULL);
636 if (imp->imp_recon_bk) {
637 CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
638 imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
639 spin_lock(&imp->imp_lock);
640 imp->imp_last_recon = 1;
641 spin_unlock(&imp->imp_lock);
645 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
649 /* Reset connect flags to the originally requested flags, in case
650 * the server is updated on-the-fly we will get the new features. */
651 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
652 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
654 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
655 &obd->obd_uuid, &imp->imp_connect_data, NULL);
659 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
661 GOTO(out, rc = -ENOMEM);
663 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
664 imp->imp_connect_op, bufs, NULL);
666 ptlrpc_request_free(request);
670 /* Report the rpc service time to the server so that it knows how long
671 * to wait for clients to join recovery */
672 lustre_msg_set_service_time(request->rq_reqmsg,
673 at_timeout2est(request->rq_timeout));
675 /* The amount of time we give the server to process the connect req.
676 * import_select_connection will increase the net latency on
677 * repeated reconnect attempts to cover slow networks.
678 * We override/ignore the server rpc completion estimate here,
679 * which may be large if this is a reconnect attempt */
680 request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
681 lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
684 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
686 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
688 request->rq_no_resend = request->rq_no_delay = 1;
689 request->rq_send_state = LUSTRE_IMP_CONNECTING;
690 /* Allow a slightly larger reply for future growth compatibility */
691 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
692 sizeof(struct obd_connect_data)+16*sizeof(__u64));
693 ptlrpc_request_set_replen(request);
694 request->rq_interpret_reply = ptlrpc_connect_interpret;
696 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
697 aa = ptlrpc_req_async_args(request);
698 memset(aa, 0, sizeof *aa);
700 aa->pcaa_peer_committed = committed_before_reconnect;
701 aa->pcaa_initial_connect = initial_connect;
703 if (aa->pcaa_initial_connect) {
704 spin_lock(&imp->imp_lock);
705 imp->imp_replayable = 1;
706 spin_unlock(&imp->imp_lock);
707 lustre_msg_add_op_flags(request->rq_reqmsg,
708 MSG_CONNECT_INITIAL);
712 lustre_msg_add_op_flags(request->rq_reqmsg,
713 MSG_CONNECT_TRANSNO);
715 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request");
716 ptlrpcd_add_req(request, PSCOPE_OTHER);
720 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
725 EXPORT_SYMBOL(ptlrpc_connect_import);
727 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
730 struct obd_import_conn *imp_conn;
736 spin_lock(&imp->imp_lock);
737 if (list_empty(&imp->imp_conn_list))
741 imp_conn = list_entry(imp->imp_conn_list.prev,
742 struct obd_import_conn,
745 /* XXX: When the failover node is the primary node, it is possible
746 * to have two identical connections in imp_conn_list. We must
747 * compare not conn's pointers but NIDs, otherwise we can defeat
748 * connection throttling. (See bug 14774.) */
749 if (imp->imp_conn_current->oic_conn->c_peer.nid !=
750 imp_conn->oic_conn->c_peer.nid) {
751 ptlrpc_ping_import_soon(imp);
755 /* liblustre has no pinger thead, so we wakup pinger anyway */
760 spin_unlock(&imp->imp_lock);
763 ptlrpc_pinger_wake_up();
768 static int ptlrpc_connect_interpret(const struct lu_env *env,
769 struct ptlrpc_request *request,
772 struct ptlrpc_connect_async_args *aa = data;
773 struct obd_import *imp = request->rq_import;
774 struct client_obd *cli = &imp->imp_obd->u.cli;
775 struct lustre_handle old_hdl;
776 __u64 old_connect_flags;
780 spin_lock(&imp->imp_lock);
781 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
782 spin_unlock(&imp->imp_lock);
785 spin_unlock(&imp->imp_lock);
790 LASSERT(imp->imp_conn_current);
792 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
794 /* All imports are pingable */
795 spin_lock(&imp->imp_lock);
796 imp->imp_pingable = 1;
798 if (aa->pcaa_initial_connect) {
799 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
800 imp->imp_replayable = 1;
801 spin_unlock(&imp->imp_lock);
802 CDEBUG(D_HA, "connected to replayable target: %s\n",
803 obd2cli_tgt(imp->imp_obd));
805 imp->imp_replayable = 0;
806 spin_unlock(&imp->imp_lock);
809 /* if applies, adjust the imp->imp_msg_magic here
810 * according to reply flags */
812 imp->imp_remote_handle =
813 *lustre_msg_get_handle(request->rq_repmsg);
815 /* Initial connects are allowed for clients with non-random
816 * uuids when servers are in recovery. Simply signal the
817 * servers replay is complete and wait in REPLAY_WAIT. */
818 if (msg_flags & MSG_CONNECT_RECOVERING) {
819 CDEBUG(D_HA, "connect to %s during recovery\n",
820 obd2cli_tgt(imp->imp_obd));
821 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
823 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
826 spin_lock(&imp->imp_lock);
827 if (imp->imp_invalid) {
828 spin_unlock(&imp->imp_lock);
829 ptlrpc_activate_import(imp);
831 spin_unlock(&imp->imp_lock);
834 GOTO(finish, rc = 0);
836 spin_unlock(&imp->imp_lock);
839 /* Determine what recovery state to move the import to. */
840 if (MSG_CONNECT_RECONNECT & msg_flags) {
841 memset(&old_hdl, 0, sizeof(old_hdl));
842 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
844 CERROR("%s@%s didn't like our handle "LPX64
845 ", failed\n", obd2cli_tgt(imp->imp_obd),
846 imp->imp_connection->c_remote_uuid.uuid,
847 imp->imp_dlm_handle.cookie);
848 GOTO(out, rc = -ENOTCONN);
851 if (memcmp(&imp->imp_remote_handle,
852 lustre_msg_get_handle(request->rq_repmsg),
853 sizeof(imp->imp_remote_handle))) {
854 int level = msg_flags & MSG_CONNECT_RECOVERING ?
857 /* Bug 16611/14775: if server handle have changed,
858 * that means some sort of disconnection happened.
859 * If the server is not in recovery, that also means it
860 * already erased all of our state because of previous
861 * eviction. If it is in recovery - we are safe to
862 * participate since we can reestablish all of our state
863 * with server again */
864 CDEBUG(level,"%s@%s changed server handle from "
865 LPX64" to "LPX64"%s\n",
866 obd2cli_tgt(imp->imp_obd),
867 imp->imp_connection->c_remote_uuid.uuid,
868 imp->imp_remote_handle.cookie,
869 lustre_msg_get_handle(request->rq_repmsg)->
871 (MSG_CONNECT_RECOVERING & msg_flags) ?
872 " but is still in recovery" : "");
874 imp->imp_remote_handle =
875 *lustre_msg_get_handle(request->rq_repmsg);
877 if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
878 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
879 GOTO(finish, rc = 0);
883 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
884 obd2cli_tgt(imp->imp_obd),
885 imp->imp_connection->c_remote_uuid.uuid);
888 if (imp->imp_invalid) {
889 CDEBUG(D_HA, "%s: reconnected but import is invalid; "
890 "marking evicted\n", imp->imp_obd->obd_name);
891 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
892 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
893 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
894 imp->imp_obd->obd_name,
895 obd2cli_tgt(imp->imp_obd));
897 spin_lock(&imp->imp_lock);
898 imp->imp_resend_replay = 1;
899 spin_unlock(&imp->imp_lock);
901 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
903 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
905 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
906 LASSERT(imp->imp_replayable);
907 imp->imp_remote_handle =
908 *lustre_msg_get_handle(request->rq_repmsg);
909 imp->imp_last_replay_transno = 0;
910 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
912 DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
913 " not set: %x)", imp->imp_obd->obd_name, msg_flags);
914 imp->imp_remote_handle =
915 *lustre_msg_get_handle(request->rq_repmsg);
916 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
919 /* Sanity checks for a reconnected import. */
920 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
921 CERROR("imp_replayable flag does not match server "
922 "after reconnect. We should LBUG right here.\n");
925 if (lustre_msg_get_last_committed(request->rq_repmsg) <
926 aa->pcaa_peer_committed) {
927 CERROR("%s went back in time (transno "LPD64
928 " was previously committed, server now claims "LPD64
929 ")! See https://bugzilla.lustre.org/show_bug.cgi?"
931 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
932 lustre_msg_get_last_committed(request->rq_repmsg));
936 rc = ptlrpc_import_recovery_state_machine(imp);
938 if (rc == -ENOTCONN) {
939 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
940 "invalidating and reconnecting\n",
941 obd2cli_tgt(imp->imp_obd),
942 imp->imp_connection->c_remote_uuid.uuid);
943 ptlrpc_connect_import(imp, NULL);
947 struct obd_connect_data *ocd;
948 struct obd_export *exp;
950 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
952 /* server replied obd_connect_data is always bigger */
953 ocd = req_capsule_server_sized_get(&request->rq_pill,
954 &RMF_CONNECT_DATA, ret);
956 spin_lock(&imp->imp_lock);
957 list_del(&imp->imp_conn_current->oic_item);
958 list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list);
959 imp->imp_last_success_conn =
960 imp->imp_conn_current->oic_last_attempt;
963 spin_unlock(&imp->imp_lock);
964 CERROR("Wrong connect data from server\n");
969 imp->imp_connect_data = *ocd;
971 exp = class_conn2export(&imp->imp_dlm_handle);
972 spin_unlock(&imp->imp_lock);
974 /* check that server granted subset of flags we asked for. */
975 LASSERTF((ocd->ocd_connect_flags &
976 imp->imp_connect_flags_orig) ==
977 ocd->ocd_connect_flags, LPX64" != "LPX64,
978 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
981 /* This could happen if export is cleaned during the
983 CERROR("Missing export for %s\n",
984 imp->imp_obd->obd_name);
985 GOTO(out, rc = -ENODEV);
987 old_connect_flags = exp->exp_connect_flags;
988 exp->exp_connect_flags = ocd->ocd_connect_flags;
989 imp->imp_obd->obd_self_export->exp_connect_flags =
990 ocd->ocd_connect_flags;
991 class_export_put(exp);
993 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
995 if (!ocd->ocd_ibits_known &&
996 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
997 CERROR("Inodebits aware server returned zero compatible"
1000 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1001 (ocd->ocd_version > LUSTRE_VERSION_CODE +
1002 LUSTRE_VERSION_OFFSET_WARN ||
1003 ocd->ocd_version < LUSTRE_VERSION_CODE -
1004 LUSTRE_VERSION_OFFSET_WARN)) {
1005 /* Sigh, some compilers do not like #ifdef in the middle
1006 of macro arguments */
1009 "older. Consider upgrading this client";
1012 "older. Consider recompiling this application";
1014 const char *newer = "newer than client version";
1016 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
1017 "is much %s (%s)\n",
1018 obd2cli_tgt(imp->imp_obd),
1019 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1020 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1021 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1022 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1023 ocd->ocd_version > LUSTRE_VERSION_CODE ?
1024 newer : older, LUSTRE_VERSION_STRING);
1027 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
1028 /* We sent to the server ocd_cksum_types with bits set
1029 * for algorithms we understand. The server masked off
1030 * the checksum types it doesn't support */
1031 if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
1032 LCONSOLE_WARN("The negotiation of the checksum "
1033 "alogrithm to use with server %s "
1034 "failed (%x/%x), disabling "
1036 obd2cli_tgt(imp->imp_obd),
1037 ocd->ocd_cksum_types,
1039 cli->cl_checksum = 0;
1040 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1041 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1043 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
1045 if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
1046 cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
1047 else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
1048 cli->cl_cksum_type = OBD_CKSUM_ADLER;
1050 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1053 /* The server does not support OBD_CONNECT_CKSUM.
1054 * Enforce CRC32 for backward compatibility*/
1055 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1056 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1059 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
1060 cli->cl_max_pages_per_rpc =
1061 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
1064 /* Reset ns_connect_flags only for initial connect. It might be
1065 * changed in while using FS and if we reset it in reconnect
1066 * this leads to lossing user settings done before such as
1067 * disable lru_resize, etc. */
1068 if (old_connect_flags != exp->exp_connect_flags ||
1069 aa->pcaa_initial_connect) {
1070 CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
1071 "flags: "LPX64"\n", imp->imp_obd->obd_name,
1072 ocd->ocd_connect_flags);
1073 imp->imp_obd->obd_namespace->ns_connect_flags =
1074 ocd->ocd_connect_flags;
1075 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
1076 ocd->ocd_connect_flags;
1079 if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
1080 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1081 /* We need a per-message support flag, because
1082 a. we don't know if the incoming connect reply
1083 supports AT or not (in reply_in_callback)
1085 b. failovered server means export and flags are gone
1086 (in ptlrpc_send_reply).
1087 Can only be set when we know AT is supported at
1089 imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1091 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1093 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
1094 (cli->cl_max_pages_per_rpc > 0));
1099 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
1100 spin_lock(&imp->imp_lock);
1101 if (aa->pcaa_initial_connect && !imp->imp_initial_recov &&
1102 (request->rq_import_generation == imp->imp_generation))
1103 ptlrpc_deactivate_and_unlock_import(imp);
1105 spin_unlock(&imp->imp_lock);
1107 if ((imp->imp_recon_bk && imp->imp_last_recon) ||
1110 * Give up trying to reconnect
1111 * EACCES means client has no permission for connection
1113 imp->imp_obd->obd_no_recov = 1;
1114 ptlrpc_deactivate_import(imp);
1117 if (rc == -EPROTO) {
1118 struct obd_connect_data *ocd;
1120 /* reply message might not be ready */
1121 if (request->rq_repmsg == NULL)
1124 ocd = req_capsule_server_get(&request->rq_pill,
1127 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1128 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
1129 /* Actually servers are only supposed to refuse
1130 connection from liblustre clients, so we should
1131 never see this from VFS context */
1132 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
1134 " refused connection from this client "
1135 "with an incompatible version (%s). "
1136 "Client must be recompiled\n",
1137 obd2cli_tgt(imp->imp_obd),
1138 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1139 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1140 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1141 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1142 LUSTRE_VERSION_STRING);
1143 ptlrpc_deactivate_import(imp);
1144 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
1149 ptlrpc_maybe_ping_import_soon(imp);
1151 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
1152 obd2cli_tgt(imp->imp_obd),
1153 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
1156 spin_lock(&imp->imp_lock);
1157 imp->imp_last_recon = 0;
1158 spin_unlock(&imp->imp_lock);
1160 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1164 static int completed_replay_interpret(const struct lu_env *env,
1165 struct ptlrpc_request *req,
1166 void * data, int rc)
1169 atomic_dec(&req->rq_import->imp_replay_inflight);
1170 if (req->rq_status == 0) {
1171 ptlrpc_import_recovery_state_machine(req->rq_import);
1173 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
1175 req->rq_import->imp_obd->obd_name, req->rq_status);
1176 ptlrpc_connect_import(req->rq_import, NULL);
1182 static int signal_completed_replay(struct obd_import *imp)
1184 struct ptlrpc_request *req;
1187 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
1188 atomic_inc(&imp->imp_replay_inflight);
1190 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
1193 atomic_dec(&imp->imp_replay_inflight);
1197 ptlrpc_request_set_replen(req);
1198 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
1199 lustre_msg_add_flags(req->rq_reqmsg,
1200 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
1201 req->rq_timeout *= 3;
1202 req->rq_interpret_reply = completed_replay_interpret;
1204 ptlrpcd_add_req(req, PSCOPE_OTHER);
1209 static int ptlrpc_invalidate_import_thread(void *data)
1211 struct obd_import *imp = data;
1216 ptlrpc_daemonize("ll_imp_inval");
1218 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1219 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1220 imp->imp_connection->c_remote_uuid.uuid);
1222 ptlrpc_invalidate_import(imp);
1224 /* is client_disconnect_export in flight ? */
1225 spin_lock(&imp->imp_lock);
1226 disconnect = imp->imp_deactive;
1227 spin_unlock(&imp->imp_lock);
1231 if (obd_dump_on_eviction) {
1232 CERROR("dump the log upon eviction\n");
1233 libcfs_debug_dumplog();
1236 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1237 ptlrpc_import_recovery_state_machine(imp);
1240 class_import_put(imp);
1245 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1253 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1254 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1255 &target_start, &target_len);
1256 /* Don't care about MGC eviction */
1257 if (strcmp(imp->imp_obd->obd_type->typ_name,
1258 LUSTRE_MGC_NAME) != 0) {
1259 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
1260 "%.*s; in progress operations using "
1261 "this service will fail.\n",
1262 target_len, target_start);
1264 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1265 obd2cli_tgt(imp->imp_obd),
1266 imp->imp_connection->c_remote_uuid.uuid);
1269 /* bug 17802: XXX client_disconnect_export vs connect request
1270 * race. if client will evicted at this time, we start
1271 * invalidate thread without referece to import and import can
1272 * be freed at same time. */
1273 class_import_get(imp);
1274 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
1275 CLONE_VM | CLONE_FILES);
1277 class_import_put(imp);
1278 CERROR("error starting invalidate thread: %d\n", rc);
1284 ptlrpc_invalidate_import(imp);
1286 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1290 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1291 CDEBUG(D_HA, "replay requested by %s\n",
1292 obd2cli_tgt(imp->imp_obd));
1293 rc = ptlrpc_replay_next(imp, &inflight);
1294 if (inflight == 0 &&
1295 atomic_read(&imp->imp_replay_inflight) == 0) {
1296 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1297 rc = ldlm_replay_locks(imp);
1304 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1305 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1306 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1307 rc = signal_completed_replay(imp);
1314 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1315 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1316 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1320 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1321 CDEBUG(D_HA, "reconnected to %s@%s\n",
1322 obd2cli_tgt(imp->imp_obd),
1323 imp->imp_connection->c_remote_uuid.uuid);
1325 rc = ptlrpc_resend(imp);
1328 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1329 ptlrpc_activate_import(imp);
1331 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1332 &target_start, &target_len);
1333 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1334 "using nid %s.\n", imp->imp_obd->obd_name,
1335 target_len, target_start,
1336 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1339 if (imp->imp_state == LUSTRE_IMP_FULL) {
1340 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1341 ptlrpc_wake_delayed(imp);
1348 static int back_to_sleep(void *unused)
1353 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1355 struct ptlrpc_request *req;
1357 int nowait = imp->imp_obd->obd_force;
1361 GOTO(set_state, rc);
1363 switch (imp->imp_connect_op) {
1364 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1365 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1366 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1368 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1369 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1373 if (ptlrpc_import_in_recovery(imp)) {
1374 struct l_wait_info lwi;
1375 cfs_duration_t timeout;
1379 if (imp->imp_server_timeout)
1380 timeout = cfs_time_seconds(obd_timeout / 2);
1382 timeout = cfs_time_seconds(obd_timeout);
1384 int idx = import_at_get_index(imp,
1385 imp->imp_client->cli_request_portal);
1386 timeout = cfs_time_seconds(
1387 at_get(&imp->imp_at.iat_service_estimate[idx]));
1390 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1391 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1392 rc = l_wait_event(imp->imp_recovery_waitq,
1393 !ptlrpc_import_in_recovery(imp), &lwi);
1397 spin_lock(&imp->imp_lock);
1398 if (imp->imp_state != LUSTRE_IMP_FULL)
1401 spin_unlock(&imp->imp_lock);
1403 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1404 LUSTRE_OBD_VERSION, rq_opc);
1406 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1407 * it fails. We can get through the above with a down server
1408 * if the client doesn't know the server is gone yet. */
1409 req->rq_no_resend = 1;
1412 /* We want client umounts to happen quickly, no matter the
1414 req->rq_timeout = min_t(int, req->rq_timeout,
1415 INITIAL_CONNECT_TIMEOUT);
1417 /* ... but we always want liblustre clients to nicely
1418 disconnect, so only use the adaptive value. */
1420 req->rq_timeout = obd_timeout / 3;
1423 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1424 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1425 ptlrpc_request_set_replen(req);
1426 rc = ptlrpc_queue_wait(req);
1427 ptlrpc_req_finished(req);
1431 spin_lock(&imp->imp_lock);
1434 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1436 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1437 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1438 imp->imp_conn_cnt = 0;
1439 /* Try all connections in the future - bz 12758 */
1440 imp->imp_last_recon = 0;
1441 spin_unlock(&imp->imp_lock);
1447 /* Adaptive Timeout utils */
1448 extern unsigned int at_min, at_max, at_history;
1450 /* Bin into timeslices using AT_BINS bins.
1451 This gives us a max of the last binlimit*AT_BINS secs without the storage,
1452 but still smoothing out a return to normalcy from a slow response.
1453 (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
1454 int at_add(struct adaptive_timeout *at, unsigned int val)
1456 unsigned int old = at->at_current;
1457 time_t now = cfs_time_current_sec();
1458 time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
1462 CDEBUG(D_INFO, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
1463 val, at, now - at->at_binstart, at->at_current,
1464 at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
1467 /* 0's don't count, because we never want our timeout to
1468 drop to 0, and because 0 could mean an error */
1471 spin_lock(&at->at_lock);
1473 if (unlikely(at->at_binstart == 0)) {
1474 /* Special case to remove default from history */
1475 at->at_current = val;
1476 at->at_worst_ever = val;
1477 at->at_worst_time = now;
1478 at->at_hist[0] = val;
1479 at->at_binstart = now;
1480 } else if (now - at->at_binstart < binlimit ) {
1482 at->at_hist[0] = max(val, at->at_hist[0]);
1483 at->at_current = max(val, at->at_current);
1486 unsigned int maxv = val;
1487 /* move bins over */
1488 shift = (now - at->at_binstart) / binlimit;
1490 for(i = AT_BINS - 1; i >= 0; i--) {
1492 at->at_hist[i] = at->at_hist[i - shift];
1493 maxv = max(maxv, at->at_hist[i]);
1498 at->at_hist[0] = val;
1499 at->at_current = maxv;
1500 at->at_binstart += shift * binlimit;
1503 if (at->at_current > at->at_worst_ever) {
1504 at->at_worst_ever = at->at_current;
1505 at->at_worst_time = now;
1508 if (at->at_flags & AT_FLG_NOHIST)
1509 /* Only keep last reported val; keeping the rest of the history
1511 at->at_current = val;
1514 at->at_current = min(at->at_current, at_max);
1515 at->at_current = max(at->at_current, at_min);
1518 if (at->at_current != old)
1519 CDEBUG(D_ADAPTTO, "AT %p change: old=%u new=%u delta=%d "
1520 "(val=%u) hist %u %u %u %u\n", at,
1521 old, at->at_current, at->at_current - old, val,
1522 at->at_hist[0], at->at_hist[1], at->at_hist[2],
1526 /* if we changed, report the old value */
1527 old = (at->at_current != old) ? old : 0;
1529 spin_unlock(&at->at_lock);
1533 /* Find the imp_at index for a given portal; assign if space available */
1534 int import_at_get_index(struct obd_import *imp, int portal)
1536 struct imp_at *at = &imp->imp_at;
1539 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1540 if (at->iat_portal[i] == portal)
1542 if (at->iat_portal[i] == 0)
1547 /* Not found in list, add it under a lock */
1548 spin_lock(&imp->imp_lock);
1550 /* Check unused under lock */
1551 for (; i < IMP_AT_MAX_PORTALS; i++) {
1552 if (at->iat_portal[i] == portal)
1554 if (at->iat_portal[i] == 0)
1559 /* Not enough portals? */
1560 LASSERT(i < IMP_AT_MAX_PORTALS);
1562 at->iat_portal[i] = portal;
1564 spin_unlock(&imp->imp_lock);