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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
39 * lustre/ptlrpc/import.c
41 * Author: Mike Shaver <shaver@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_RPC
46 # include <liblustre.h>
49 #include <obd_support.h>
50 #include <lustre_ha.h>
51 #include <lustre_net.h>
52 #include <lustre_import.h>
53 #include <lustre_export.h>
55 #include <obd_cksum.h>
56 #include <obd_class.h>
58 #include "ptlrpc_internal.h"
60 struct ptlrpc_connect_async_args {
61 __u64 pcaa_peer_committed;
62 int pcaa_initial_connect;
66 * Updates import \a imp current state to provided \a state value
67 * Helper function. Must be called under imp_lock.
69 static void __import_set_state(struct obd_import *imp,
70 enum lustre_imp_state state)
72 imp->imp_state = state;
73 imp->imp_state_hist[imp->imp_state_hist_idx].ish_state = state;
74 imp->imp_state_hist[imp->imp_state_hist_idx].ish_time =
75 cfs_time_current_sec();
76 imp->imp_state_hist_idx = (imp->imp_state_hist_idx + 1) %
80 /* A CLOSED import should remain so. */
81 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
83 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
84 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
85 imp, obd2cli_tgt(imp->imp_obd), \
86 ptlrpc_import_state_name(imp->imp_state), \
87 ptlrpc_import_state_name(state)); \
88 __import_set_state(imp, state); \
92 #define IMPORT_SET_STATE(imp, state) \
94 cfs_spin_lock(&imp->imp_lock); \
95 IMPORT_SET_STATE_NOLOCK(imp, state); \
96 cfs_spin_unlock(&imp->imp_lock); \
100 static int ptlrpc_connect_interpret(const struct lu_env *env,
101 struct ptlrpc_request *request,
102 void * data, int rc);
103 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
105 /* Only this function is allowed to change the import state when it is
106 * CLOSED. I would rather refcount the import and free it after
107 * disconnection like we do with exports. To do that, the client_obd
108 * will need to save the peer info somewhere other than in the import,
110 int ptlrpc_init_import(struct obd_import *imp)
112 cfs_spin_lock(&imp->imp_lock);
114 imp->imp_generation++;
115 imp->imp_state = LUSTRE_IMP_NEW;
117 cfs_spin_unlock(&imp->imp_lock);
121 EXPORT_SYMBOL(ptlrpc_init_import);
123 #define UUID_STR "_UUID"
124 static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
127 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
128 ? uuid : uuid + strlen(prefix);
130 *uuid_len = strlen(*uuid_start);
132 if (*uuid_len < strlen(UUID_STR))
135 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
136 UUID_STR, strlen(UUID_STR)))
137 *uuid_len -= strlen(UUID_STR);
141 * Returns true if import was FULL, false if import was already not
143 * @imp - import to be disconnected
144 * @conn_cnt - connection count (epoch) of the request that timed out
145 * and caused the disconnection. In some cases, multiple
146 * inflight requests can fail to a single target (e.g. OST
147 * bulk requests) and if one has already caused a reconnection
148 * (increasing the import->conn_cnt) the older failure should
149 * not also cause a reconnection. If zero it forces a reconnect.
151 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
155 cfs_spin_lock(&imp->imp_lock);
157 if (imp->imp_state == LUSTRE_IMP_FULL &&
158 (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
162 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
163 &target_start, &target_len);
165 if (imp->imp_replayable) {
166 LCONSOLE_WARN("%s: Connection to service %.*s via nid "
167 "%s was lost; in progress operations using this "
168 "service will wait for recovery to complete.\n",
169 imp->imp_obd->obd_name, target_len, target_start,
170 libcfs_nid2str(imp->imp_connection->c_peer.nid));
172 LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
173 "%.*s via nid %s was lost; in progress "
174 "operations using this service will fail.\n",
175 imp->imp_obd->obd_name,
176 target_len, target_start,
177 libcfs_nid2str(imp->imp_connection->c_peer.nid));
179 ptlrpc_deactivate_timeouts(imp);
180 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
181 cfs_spin_unlock(&imp->imp_lock);
183 if (obd_dump_on_timeout)
184 libcfs_debug_dumplog();
186 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
189 cfs_spin_unlock(&imp->imp_lock);
190 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
191 imp->imp_client->cli_name, imp,
192 (imp->imp_state == LUSTRE_IMP_FULL &&
193 imp->imp_conn_cnt > conn_cnt) ?
194 "reconnected" : "not connected", imp->imp_conn_cnt,
195 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
201 /* Must be called with imp_lock held! */
202 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
205 LASSERT_SPIN_LOCKED(&imp->imp_lock);
207 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
208 imp->imp_invalid = 1;
209 imp->imp_generation++;
210 cfs_spin_unlock(&imp->imp_lock);
212 ptlrpc_abort_inflight(imp);
213 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
219 * This acts as a barrier; all existing requests are rejected, and
220 * no new requests will be accepted until the import is valid again.
222 void ptlrpc_deactivate_import(struct obd_import *imp)
224 cfs_spin_lock(&imp->imp_lock);
225 ptlrpc_deactivate_and_unlock_import(imp);
229 ptlrpc_inflight_deadline(struct ptlrpc_request *req, time_t now)
233 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
234 (req->rq_phase == RQ_PHASE_BULK) ||
235 (req->rq_phase == RQ_PHASE_NEW)))
238 if (req->rq_timedout)
241 if (req->rq_phase == RQ_PHASE_NEW)
244 dl = req->rq_deadline;
252 static unsigned int ptlrpc_inflight_timeout(struct obd_import *imp)
254 time_t now = cfs_time_current_sec();
256 struct ptlrpc_request *req;
257 unsigned int timeout = 0;
259 cfs_spin_lock(&imp->imp_lock);
260 cfs_list_for_each_safe(tmp, n, &imp->imp_sending_list) {
261 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
262 timeout = max(ptlrpc_inflight_deadline(req, now), timeout);
264 cfs_spin_unlock(&imp->imp_lock);
269 * This function will invalidate the import, if necessary, then block
270 * for all the RPC completions, and finally notify the obd to
271 * invalidate its state (ie cancel locks, clear pending requests,
274 void ptlrpc_invalidate_import(struct obd_import *imp)
277 struct ptlrpc_request *req;
278 struct l_wait_info lwi;
279 unsigned int timeout;
282 cfs_atomic_inc(&imp->imp_inval_count);
284 if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
285 ptlrpc_deactivate_import(imp);
287 LASSERT(imp->imp_invalid);
289 /* Wait forever until inflight == 0. We really can't do it another
290 * way because in some cases we need to wait for very long reply
291 * unlink. We can't do anything before that because there is really
292 * no guarantee that some rdma transfer is not in progress right now. */
294 /* Calculate max timeout for waiting on rpcs to error
295 * out. Use obd_timeout if calculated value is smaller
297 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
298 timeout = ptlrpc_inflight_timeout(imp);
299 timeout += timeout / 3;
302 timeout = obd_timeout;
304 /* decrease the interval to increase race condition */
308 CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n",
311 /* Wait for all requests to error out and call completion
312 * callbacks. Cap it at obd_timeout -- these should all
313 * have been locally cancelled by ptlrpc_abort_inflight. */
314 lwi = LWI_TIMEOUT_INTERVAL(
315 cfs_timeout_cap(cfs_time_seconds(timeout)),
316 (timeout > 1)?cfs_time_seconds(1):cfs_time_seconds(1)/2,
318 rc = l_wait_event(imp->imp_recovery_waitq,
319 (cfs_atomic_read(&imp->imp_inflight) == 0),
322 const char *cli_tgt = obd2cli_tgt(imp->imp_obd);
324 CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
326 cfs_atomic_read(&imp->imp_inflight));
328 cfs_spin_lock(&imp->imp_lock);
329 if (cfs_atomic_read(&imp->imp_inflight) == 0) {
330 int count = cfs_atomic_read(&imp->imp_unregistering);
332 /* We know that "unregistering" rpcs only can
333 * survive in sending or delaying lists (they
334 * maybe waiting for long reply unlink in
335 * sluggish nets). Let's check this. If there
336 * is no inflight and unregistering != 0, this
338 LASSERTF(count == 0, "Some RPCs are still "
339 "unregistering: %d\n", count);
341 /* Let's save one loop as soon as inflight have
342 * dropped to zero. No new inflights possible at
346 cfs_list_for_each_safe(tmp, n,
347 &imp->imp_sending_list) {
348 req = cfs_list_entry(tmp,
349 struct ptlrpc_request,
351 DEBUG_REQ(D_ERROR, req,
352 "still on sending list");
354 cfs_list_for_each_safe(tmp, n,
355 &imp->imp_delayed_list) {
356 req = cfs_list_entry(tmp,
357 struct ptlrpc_request,
359 DEBUG_REQ(D_ERROR, req,
360 "still on delayed list");
363 CERROR("%s: RPCs in \"%s\" phase found (%d). "
364 "Network is sluggish? Waiting them "
365 "to error out.\n", cli_tgt,
366 ptlrpc_phase2str(RQ_PHASE_UNREGISTERING),
367 cfs_atomic_read(&imp->
370 cfs_spin_unlock(&imp->imp_lock);
375 * Let's additionally check that no new rpcs added to import in
376 * "invalidate" state.
378 LASSERT(cfs_atomic_read(&imp->imp_inflight) == 0);
379 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
380 sptlrpc_import_flush_all_ctx(imp);
382 cfs_atomic_dec(&imp->imp_inval_count);
383 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
386 /* unset imp_invalid */
387 void ptlrpc_activate_import(struct obd_import *imp)
389 struct obd_device *obd = imp->imp_obd;
391 cfs_spin_lock(&imp->imp_lock);
392 imp->imp_invalid = 0;
393 ptlrpc_activate_timeouts(imp);
394 cfs_spin_unlock(&imp->imp_lock);
395 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
398 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
402 LASSERT(!imp->imp_dlm_fake);
404 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
405 if (!imp->imp_replayable) {
406 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
407 "auto-deactivating\n",
408 obd2cli_tgt(imp->imp_obd),
409 imp->imp_connection->c_remote_uuid.uuid,
410 imp->imp_obd->obd_name);
411 ptlrpc_deactivate_import(imp);
414 CDEBUG(D_HA, "%s: waking up pinger\n",
415 obd2cli_tgt(imp->imp_obd));
417 cfs_spin_lock(&imp->imp_lock);
418 imp->imp_force_verify = 1;
419 cfs_spin_unlock(&imp->imp_lock);
421 ptlrpc_pinger_wake_up();
426 int ptlrpc_reconnect_import(struct obd_import *imp)
428 ptlrpc_set_import_discon(imp, 0);
429 /* Force a new connect attempt */
430 ptlrpc_invalidate_import(imp);
431 /* Do a fresh connect next time by zeroing the handle */
432 ptlrpc_disconnect_import(imp, 1);
433 /* Wait for all invalidate calls to finish */
434 if (cfs_atomic_read(&imp->imp_inval_count) > 0) {
436 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
437 rc = l_wait_event(imp->imp_recovery_waitq,
438 (cfs_atomic_read(&imp->imp_inval_count) == 0),
441 CERROR("Interrupted, inval=%d\n",
442 cfs_atomic_read(&imp->imp_inval_count));
445 /* Allow reconnect attempts */
446 imp->imp_obd->obd_no_recov = 0;
447 /* Remove 'invalid' flag */
448 ptlrpc_activate_import(imp);
449 /* Attempt a new connect */
450 ptlrpc_recover_import(imp, NULL);
454 EXPORT_SYMBOL(ptlrpc_reconnect_import);
457 * Connection on import \a imp is changed to another one (if more than one is
458 * present). We typically chose connection that we have not tried to connect to
461 static int import_select_connection(struct obd_import *imp)
463 struct obd_import_conn *imp_conn = NULL, *conn;
464 struct obd_export *dlmexp;
468 cfs_spin_lock(&imp->imp_lock);
470 if (cfs_list_empty(&imp->imp_conn_list)) {
471 CERROR("%s: no connections available\n",
472 imp->imp_obd->obd_name);
473 cfs_spin_unlock(&imp->imp_lock);
477 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
478 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
479 imp->imp_obd->obd_name,
480 libcfs_nid2str(conn->oic_conn->c_peer.nid),
481 conn->oic_last_attempt);
482 /* Don't thrash connections */
483 if (cfs_time_before_64(cfs_time_current_64(),
484 conn->oic_last_attempt +
485 cfs_time_seconds(CONNECTION_SWITCH_MIN))) {
489 /* If we have not tried this connection since
490 the last successful attempt, go with this one */
491 if ((conn->oic_last_attempt == 0) ||
492 cfs_time_beforeq_64(conn->oic_last_attempt,
493 imp->imp_last_success_conn)) {
499 /* If all of the connections have already been tried
500 since the last successful connection; just choose the
501 least recently used */
504 else if (cfs_time_before_64(conn->oic_last_attempt,
505 imp_conn->oic_last_attempt))
509 /* if not found, simply choose the current one */
510 if (!imp_conn || imp->imp_force_reconnect) {
511 LASSERT(imp->imp_conn_current);
512 imp_conn = imp->imp_conn_current;
515 LASSERT(imp_conn->oic_conn);
517 /* If we've tried everything, and we're back to the beginning of the
518 list, increase our timeout and try again. It will be reset when
519 we do finally connect. (FIXME: really we should wait for all network
520 state associated with the last connection attempt to drain before
521 trying to reconnect on it.) */
522 if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item)) {
523 if (at_get(&imp->imp_at.iat_net_latency) <
524 CONNECTION_SWITCH_MAX) {
525 at_measured(&imp->imp_at.iat_net_latency,
526 at_get(&imp->imp_at.iat_net_latency) +
527 CONNECTION_SWITCH_INC);
529 LASSERT(imp_conn->oic_last_attempt);
530 CWARN("%s: tried all connections, increasing latency to %ds\n",
531 imp->imp_obd->obd_name,
532 at_get(&imp->imp_at.iat_net_latency));
535 imp_conn->oic_last_attempt = cfs_time_current_64();
537 /* switch connection, don't mind if it's same as the current one */
538 if (imp->imp_connection)
539 ptlrpc_connection_put(imp->imp_connection);
540 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
542 dlmexp = class_conn2export(&imp->imp_dlm_handle);
543 LASSERT(dlmexp != NULL);
544 if (dlmexp->exp_connection)
545 ptlrpc_connection_put(dlmexp->exp_connection);
546 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
547 class_export_put(dlmexp);
549 if (imp->imp_conn_current != imp_conn) {
550 if (imp->imp_conn_current)
551 CDEBUG(D_HA, "Changing connection for %s to %s/%s\n",
552 imp->imp_obd->obd_name, imp_conn->oic_uuid.uuid,
553 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
554 imp->imp_conn_current = imp_conn;
557 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
558 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
559 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
561 cfs_spin_unlock(&imp->imp_lock);
567 * must be called under imp_lock
569 static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
571 struct ptlrpc_request *req;
574 if (cfs_list_empty(&imp->imp_replay_list))
576 tmp = imp->imp_replay_list.next;
577 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
578 *transno = req->rq_transno;
579 if (req->rq_transno == 0) {
580 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
588 * Attempt to (re)connect import \a imp. This includes all preparations,
589 * initializing CONNECT RPC request and passing it to ptlrpcd for
591 * Returns 0 on success or error code.
593 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
595 struct obd_device *obd = imp->imp_obd;
596 int initial_connect = 0;
598 __u64 committed_before_reconnect = 0;
599 struct ptlrpc_request *request;
600 char *bufs[] = { NULL,
601 obd2cli_tgt(imp->imp_obd),
603 (char *)&imp->imp_dlm_handle,
604 (char *)&imp->imp_connect_data };
605 struct ptlrpc_connect_async_args *aa;
609 cfs_spin_lock(&imp->imp_lock);
610 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
611 cfs_spin_unlock(&imp->imp_lock);
612 CERROR("can't connect to a closed import\n");
614 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
615 cfs_spin_unlock(&imp->imp_lock);
616 CERROR("already connected\n");
618 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
619 cfs_spin_unlock(&imp->imp_lock);
620 CERROR("already connecting\n");
624 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
627 imp->imp_resend_replay = 0;
629 if (!lustre_handle_is_used(&imp->imp_remote_handle))
632 committed_before_reconnect = imp->imp_peer_committed_transno;
634 set_transno = ptlrpc_first_transno(imp,
635 &imp->imp_connect_data.ocd_transno);
636 cfs_spin_unlock(&imp->imp_lock);
639 struct obd_uuid uuid;
641 obd_str2uuid(&uuid, new_uuid);
642 rc = import_set_conn_priority(imp, &uuid);
647 rc = import_select_connection(imp);
651 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
655 /* Reset connect flags to the originally requested flags, in case
656 * the server is updated on-the-fly we will get the new features. */
657 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
658 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
659 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
661 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
662 &obd->obd_uuid, &imp->imp_connect_data, NULL);
666 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
668 GOTO(out, rc = -ENOMEM);
670 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
671 imp->imp_connect_op, bufs, NULL);
673 ptlrpc_request_free(request);
677 /* Report the rpc service time to the server so that it knows how long
678 * to wait for clients to join recovery */
679 lustre_msg_set_service_time(request->rq_reqmsg,
680 at_timeout2est(request->rq_timeout));
682 /* The amount of time we give the server to process the connect req.
683 * import_select_connection will increase the net latency on
684 * repeated reconnect attempts to cover slow networks.
685 * We override/ignore the server rpc completion estimate here,
686 * which may be large if this is a reconnect attempt */
687 request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
688 lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
691 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
693 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
695 request->rq_no_resend = request->rq_no_delay = 1;
696 request->rq_send_state = LUSTRE_IMP_CONNECTING;
697 /* Allow a slightly larger reply for future growth compatibility */
698 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
699 sizeof(struct obd_connect_data)+16*sizeof(__u64));
700 ptlrpc_request_set_replen(request);
701 request->rq_interpret_reply = ptlrpc_connect_interpret;
703 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
704 aa = ptlrpc_req_async_args(request);
705 memset(aa, 0, sizeof *aa);
707 aa->pcaa_peer_committed = committed_before_reconnect;
708 aa->pcaa_initial_connect = initial_connect;
710 if (aa->pcaa_initial_connect) {
711 cfs_spin_lock(&imp->imp_lock);
712 imp->imp_replayable = 1;
713 cfs_spin_unlock(&imp->imp_lock);
714 lustre_msg_add_op_flags(request->rq_reqmsg,
715 MSG_CONNECT_INITIAL);
719 lustre_msg_add_op_flags(request->rq_reqmsg,
720 MSG_CONNECT_TRANSNO);
722 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)",
723 request->rq_timeout);
724 ptlrpcd_add_req(request, PSCOPE_OTHER);
728 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
733 EXPORT_SYMBOL(ptlrpc_connect_import);
735 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
738 struct obd_import_conn *imp_conn;
744 cfs_spin_lock(&imp->imp_lock);
745 if (cfs_list_empty(&imp->imp_conn_list))
749 imp_conn = cfs_list_entry(imp->imp_conn_list.prev,
750 struct obd_import_conn,
753 /* XXX: When the failover node is the primary node, it is possible
754 * to have two identical connections in imp_conn_list. We must
755 * compare not conn's pointers but NIDs, otherwise we can defeat
756 * connection throttling. (See bug 14774.) */
757 if (imp->imp_conn_current->oic_conn->c_peer.nid !=
758 imp_conn->oic_conn->c_peer.nid) {
759 ptlrpc_ping_import_soon(imp);
763 /* liblustre has no pinger thread, so we wakeup pinger anyway */
768 cfs_spin_unlock(&imp->imp_lock);
771 ptlrpc_pinger_wake_up();
776 static int ptlrpc_busy_reconnect(int rc)
778 return (rc == -EBUSY) || (rc == -EAGAIN);
782 * interpret_reply callback for connect RPCs.
783 * Looks into returned status of connect operation and decides
784 * what to do with the import - i.e enter recovery, promote it to
785 * full state for normal operations of disconnect it due to an error.
787 static int ptlrpc_connect_interpret(const struct lu_env *env,
788 struct ptlrpc_request *request,
791 struct ptlrpc_connect_async_args *aa = data;
792 struct obd_import *imp = request->rq_import;
793 struct client_obd *cli = &imp->imp_obd->u.cli;
794 struct lustre_handle old_hdl;
795 __u64 old_connect_flags;
799 cfs_spin_lock(&imp->imp_lock);
800 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
801 cfs_spin_unlock(&imp->imp_lock);
806 /* if this reconnect to busy export - not need select new target
808 imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc);
809 cfs_spin_unlock(&imp->imp_lock);
813 LASSERT(imp->imp_conn_current);
815 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
817 /* All imports are pingable */
818 imp->imp_pingable = 1;
819 imp->imp_force_reconnect = 0;
821 if (aa->pcaa_initial_connect) {
822 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
823 imp->imp_replayable = 1;
824 cfs_spin_unlock(&imp->imp_lock);
825 CDEBUG(D_HA, "connected to replayable target: %s\n",
826 obd2cli_tgt(imp->imp_obd));
828 imp->imp_replayable = 0;
829 cfs_spin_unlock(&imp->imp_lock);
832 /* if applies, adjust the imp->imp_msg_magic here
833 * according to reply flags */
835 imp->imp_remote_handle =
836 *lustre_msg_get_handle(request->rq_repmsg);
838 /* Initial connects are allowed for clients with non-random
839 * uuids when servers are in recovery. Simply signal the
840 * servers replay is complete and wait in REPLAY_WAIT. */
841 if (msg_flags & MSG_CONNECT_RECOVERING) {
842 CDEBUG(D_HA, "connect to %s during recovery\n",
843 obd2cli_tgt(imp->imp_obd));
844 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
846 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
847 ptlrpc_activate_import(imp);
850 GOTO(finish, rc = 0);
852 cfs_spin_unlock(&imp->imp_lock);
855 /* Determine what recovery state to move the import to. */
856 if (MSG_CONNECT_RECONNECT & msg_flags) {
857 memset(&old_hdl, 0, sizeof(old_hdl));
858 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
860 CERROR("%s@%s didn't like our handle "LPX64
861 ", failed\n", obd2cli_tgt(imp->imp_obd),
862 imp->imp_connection->c_remote_uuid.uuid,
863 imp->imp_dlm_handle.cookie);
864 GOTO(out, rc = -ENOTCONN);
867 if (memcmp(&imp->imp_remote_handle,
868 lustre_msg_get_handle(request->rq_repmsg),
869 sizeof(imp->imp_remote_handle))) {
870 int level = msg_flags & MSG_CONNECT_RECOVERING ?
873 /* Bug 16611/14775: if server handle have changed,
874 * that means some sort of disconnection happened.
875 * If the server is not in recovery, that also means it
876 * already erased all of our state because of previous
877 * eviction. If it is in recovery - we are safe to
878 * participate since we can reestablish all of our state
879 * with server again */
880 CDEBUG(level,"%s@%s changed server handle from "
881 LPX64" to "LPX64"%s\n",
882 obd2cli_tgt(imp->imp_obd),
883 imp->imp_connection->c_remote_uuid.uuid,
884 imp->imp_remote_handle.cookie,
885 lustre_msg_get_handle(request->rq_repmsg)->
887 (MSG_CONNECT_RECOVERING & msg_flags) ?
888 " but is still in recovery" : "");
890 imp->imp_remote_handle =
891 *lustre_msg_get_handle(request->rq_repmsg);
893 if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
894 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
895 GOTO(finish, rc = 0);
899 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
900 obd2cli_tgt(imp->imp_obd),
901 imp->imp_connection->c_remote_uuid.uuid);
904 if (imp->imp_invalid) {
905 CDEBUG(D_HA, "%s: reconnected but import is invalid; "
906 "marking evicted\n", imp->imp_obd->obd_name);
907 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
908 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
909 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
910 imp->imp_obd->obd_name,
911 obd2cli_tgt(imp->imp_obd));
913 cfs_spin_lock(&imp->imp_lock);
914 imp->imp_resend_replay = 1;
915 cfs_spin_unlock(&imp->imp_lock);
917 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
919 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
921 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
922 LASSERT(imp->imp_replayable);
923 imp->imp_remote_handle =
924 *lustre_msg_get_handle(request->rq_repmsg);
925 imp->imp_last_replay_transno = 0;
926 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
928 DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
929 " not set: %x)", imp->imp_obd->obd_name, msg_flags);
930 imp->imp_remote_handle =
931 *lustre_msg_get_handle(request->rq_repmsg);
932 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
935 /* Sanity checks for a reconnected import. */
936 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
937 CERROR("imp_replayable flag does not match server "
938 "after reconnect. We should LBUG right here.\n");
941 if (lustre_msg_get_last_committed(request->rq_repmsg) > 0 &&
942 lustre_msg_get_last_committed(request->rq_repmsg) <
943 aa->pcaa_peer_committed) {
944 CERROR("%s went back in time (transno "LPD64
945 " was previously committed, server now claims "LPD64
946 ")! See https://bugzilla.lustre.org/show_bug.cgi?"
948 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
949 lustre_msg_get_last_committed(request->rq_repmsg));
953 rc = ptlrpc_import_recovery_state_machine(imp);
955 if (rc == -ENOTCONN) {
956 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
957 "invalidating and reconnecting\n",
958 obd2cli_tgt(imp->imp_obd),
959 imp->imp_connection->c_remote_uuid.uuid);
960 ptlrpc_connect_import(imp, NULL);
964 struct obd_connect_data *ocd;
965 struct obd_export *exp;
967 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
969 /* server replied obd_connect_data is always bigger */
970 ocd = req_capsule_server_sized_get(&request->rq_pill,
971 &RMF_CONNECT_DATA, ret);
973 cfs_spin_lock(&imp->imp_lock);
974 cfs_list_del(&imp->imp_conn_current->oic_item);
975 cfs_list_add(&imp->imp_conn_current->oic_item,
976 &imp->imp_conn_list);
977 imp->imp_last_success_conn =
978 imp->imp_conn_current->oic_last_attempt;
981 cfs_spin_unlock(&imp->imp_lock);
982 CERROR("Wrong connect data from server\n");
987 imp->imp_connect_data = *ocd;
989 exp = class_conn2export(&imp->imp_dlm_handle);
990 cfs_spin_unlock(&imp->imp_lock);
992 /* check that server granted subset of flags we asked for. */
993 LASSERTF((ocd->ocd_connect_flags &
994 imp->imp_connect_flags_orig) ==
995 ocd->ocd_connect_flags, LPX64" != "LPX64,
996 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
999 /* This could happen if export is cleaned during the
1001 CERROR("Missing export for %s\n",
1002 imp->imp_obd->obd_name);
1003 GOTO(out, rc = -ENODEV);
1005 old_connect_flags = exp->exp_connect_flags;
1006 exp->exp_connect_flags = ocd->ocd_connect_flags;
1007 imp->imp_obd->obd_self_export->exp_connect_flags =
1008 ocd->ocd_connect_flags;
1009 class_export_put(exp);
1011 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
1013 if (!ocd->ocd_ibits_known &&
1014 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
1015 CERROR("Inodebits aware server returned zero compatible"
1018 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1019 (ocd->ocd_version > LUSTRE_VERSION_CODE +
1020 LUSTRE_VERSION_OFFSET_WARN ||
1021 ocd->ocd_version < LUSTRE_VERSION_CODE -
1022 LUSTRE_VERSION_OFFSET_WARN)) {
1023 /* Sigh, some compilers do not like #ifdef in the middle
1024 of macro arguments */
1027 "older. Consider upgrading this client";
1030 "older. Consider recompiling this application";
1032 const char *newer = "newer than client version";
1034 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
1035 "is much %s (%s)\n",
1036 obd2cli_tgt(imp->imp_obd),
1037 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1038 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1039 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1040 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1041 ocd->ocd_version > LUSTRE_VERSION_CODE ?
1042 newer : older, LUSTRE_VERSION_STRING);
1045 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
1046 /* We sent to the server ocd_cksum_types with bits set
1047 * for algorithms we understand. The server masked off
1048 * the checksum types it doesn't support */
1049 if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
1050 LCONSOLE_WARN("The negotiation of the checksum "
1051 "alogrithm to use with server %s "
1052 "failed (%x/%x), disabling "
1054 obd2cli_tgt(imp->imp_obd),
1055 ocd->ocd_cksum_types,
1057 cli->cl_checksum = 0;
1058 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1059 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1061 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
1063 if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
1064 cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
1065 else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
1066 cli->cl_cksum_type = OBD_CKSUM_ADLER;
1068 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1071 /* The server does not support OBD_CONNECT_CKSUM.
1072 * Enforce CRC32 for backward compatibility*/
1073 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1074 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1077 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
1078 cli->cl_max_pages_per_rpc =
1079 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
1080 else if (imp->imp_connect_op == MDS_CONNECT ||
1081 imp->imp_connect_op == MGS_CONNECT)
1082 cli->cl_max_pages_per_rpc = 1;
1084 /* Reset ns_connect_flags only for initial connect. It might be
1085 * changed in while using FS and if we reset it in reconnect
1086 * this leads to losing user settings done before such as
1087 * disable lru_resize, etc. */
1088 if (old_connect_flags != exp->exp_connect_flags ||
1089 aa->pcaa_initial_connect) {
1090 CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
1091 "flags: "LPX64"\n", imp->imp_obd->obd_name,
1092 ocd->ocd_connect_flags);
1093 imp->imp_obd->obd_namespace->ns_connect_flags =
1094 ocd->ocd_connect_flags;
1095 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
1096 ocd->ocd_connect_flags;
1099 if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
1100 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1101 /* We need a per-message support flag, because
1102 a. we don't know if the incoming connect reply
1103 supports AT or not (in reply_in_callback)
1105 b. failovered server means export and flags are gone
1106 (in ptlrpc_send_reply).
1107 Can only be set when we know AT is supported at
1109 imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1111 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1113 if ((ocd->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1114 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1115 imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1117 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1119 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
1120 (cli->cl_max_pages_per_rpc > 0));
1125 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
1126 if (rc == -EACCES) {
1128 * Give up trying to reconnect
1129 * EACCES means client has no permission for connection
1131 imp->imp_obd->obd_no_recov = 1;
1132 ptlrpc_deactivate_import(imp);
1135 if (rc == -EPROTO) {
1136 struct obd_connect_data *ocd;
1138 /* reply message might not be ready */
1139 if (request->rq_repmsg == NULL)
1142 ocd = req_capsule_server_get(&request->rq_pill,
1145 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1146 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
1147 /* Actually servers are only supposed to refuse
1148 connection from liblustre clients, so we should
1149 never see this from VFS context */
1150 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
1152 " refused connection from this client "
1153 "with an incompatible version (%s). "
1154 "Client must be recompiled\n",
1155 obd2cli_tgt(imp->imp_obd),
1156 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1157 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1158 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1159 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1160 LUSTRE_VERSION_STRING);
1161 ptlrpc_deactivate_import(imp);
1162 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
1167 ptlrpc_maybe_ping_import_soon(imp);
1169 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
1170 obd2cli_tgt(imp->imp_obd),
1171 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
1174 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1179 * interpret callback for "completed replay" RPCs.
1180 * \see signal_completed_replay
1182 static int completed_replay_interpret(const struct lu_env *env,
1183 struct ptlrpc_request *req,
1184 void * data, int rc)
1187 cfs_atomic_dec(&req->rq_import->imp_replay_inflight);
1188 if (req->rq_status == 0 &&
1189 !req->rq_import->imp_vbr_failed) {
1190 ptlrpc_import_recovery_state_machine(req->rq_import);
1192 if (req->rq_import->imp_vbr_failed) {
1194 "%s: version recovery fails, reconnecting\n",
1195 req->rq_import->imp_obd->obd_name);
1197 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
1199 req->rq_import->imp_obd->obd_name,
1202 ptlrpc_connect_import(req->rq_import, NULL);
1209 * Let server know that we have no requests to replay anymore.
1210 * Achieved by just sending a PING request
1212 static int signal_completed_replay(struct obd_import *imp)
1214 struct ptlrpc_request *req;
1217 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_FINISH_REPLAY)))
1220 LASSERT(cfs_atomic_read(&imp->imp_replay_inflight) == 0);
1221 cfs_atomic_inc(&imp->imp_replay_inflight);
1223 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
1226 cfs_atomic_dec(&imp->imp_replay_inflight);
1230 ptlrpc_request_set_replen(req);
1231 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
1232 lustre_msg_add_flags(req->rq_reqmsg,
1233 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
1235 req->rq_timeout *= 3;
1236 req->rq_interpret_reply = completed_replay_interpret;
1238 ptlrpcd_add_req(req, PSCOPE_OTHER);
1244 * In kernel code all import invalidation happens in its own
1245 * separate thread, so that whatever application happened to encounter
1246 * a problem could still be killed or otherwise continue
1248 static int ptlrpc_invalidate_import_thread(void *data)
1250 struct obd_import *imp = data;
1254 cfs_daemonize_ctxt("ll_imp_inval");
1256 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1257 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1258 imp->imp_connection->c_remote_uuid.uuid);
1260 ptlrpc_invalidate_import(imp);
1262 if (obd_dump_on_eviction) {
1263 CERROR("dump the log upon eviction\n");
1264 libcfs_debug_dumplog();
1267 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1268 ptlrpc_import_recovery_state_machine(imp);
1270 class_import_put(imp);
1276 * This is the state machine for client-side recovery on import.
1278 * Typicaly we have two possibly paths. If we came to server and it is not
1279 * in recovery, we just enter IMP_EVICTED state, invalidate our import
1280 * state and reconnect from scratch.
1281 * If we came to server that is in recovery, we enter IMP_REPLAY import state.
1282 * We go through our list of requests to replay and send them to server one by
1284 * After sending all request from the list we change import state to
1285 * IMP_REPLAY_LOCKS and re-request all the locks we believe we have from server
1286 * and also all the locks we don't yet have and wait for server to grant us.
1287 * After that we send a special "replay completed" request and change import
1288 * state to IMP_REPLAY_WAIT.
1289 * Upon receiving reply to that "replay completed" RPC we enter IMP_RECOVER
1290 * state and resend all requests from sending list.
1291 * After that we promote import to FULL state and send all delayed requests
1292 * and import is fully operational after that.
1295 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1303 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1304 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1305 &target_start, &target_len);
1306 /* Don't care about MGC eviction */
1307 if (strcmp(imp->imp_obd->obd_type->typ_name,
1308 LUSTRE_MGC_NAME) != 0) {
1309 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
1310 "%.*s; in progress operations using "
1311 "this service will fail.\n",
1312 target_len, target_start);
1314 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1315 obd2cli_tgt(imp->imp_obd),
1316 imp->imp_connection->c_remote_uuid.uuid);
1317 /* reset vbr_failed flag upon eviction */
1318 cfs_spin_lock(&imp->imp_lock);
1319 imp->imp_vbr_failed = 0;
1320 cfs_spin_unlock(&imp->imp_lock);
1323 /* bug 17802: XXX client_disconnect_export vs connect request
1324 * race. if client will evicted at this time, we start
1325 * invalidate thread without reference to import and import can
1326 * be freed at same time. */
1327 class_import_get(imp);
1328 rc = cfs_create_thread(ptlrpc_invalidate_import_thread, imp,
1331 class_import_put(imp);
1332 CERROR("error starting invalidate thread: %d\n", rc);
1338 ptlrpc_invalidate_import(imp);
1340 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1344 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1345 CDEBUG(D_HA, "replay requested by %s\n",
1346 obd2cli_tgt(imp->imp_obd));
1347 rc = ptlrpc_replay_next(imp, &inflight);
1348 if (inflight == 0 &&
1349 cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1350 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1351 rc = ldlm_replay_locks(imp);
1358 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1359 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1360 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1361 rc = signal_completed_replay(imp);
1368 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1369 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1370 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1374 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1375 CDEBUG(D_HA, "reconnected to %s@%s\n",
1376 obd2cli_tgt(imp->imp_obd),
1377 imp->imp_connection->c_remote_uuid.uuid);
1379 rc = ptlrpc_resend(imp);
1382 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1383 ptlrpc_activate_import(imp);
1385 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1386 &target_start, &target_len);
1387 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1388 "using nid %s.\n", imp->imp_obd->obd_name,
1389 target_len, target_start,
1390 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1393 if (imp->imp_state == LUSTRE_IMP_FULL) {
1394 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1395 ptlrpc_wake_delayed(imp);
1402 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1404 struct ptlrpc_request *req;
1406 int nowait = imp->imp_obd->obd_force;
1410 GOTO(set_state, rc);
1412 switch (imp->imp_connect_op) {
1413 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1414 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1415 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1417 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1418 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1422 if (ptlrpc_import_in_recovery(imp)) {
1423 struct l_wait_info lwi;
1424 cfs_duration_t timeout;
1428 if (imp->imp_server_timeout)
1429 timeout = cfs_time_seconds(obd_timeout / 2);
1431 timeout = cfs_time_seconds(obd_timeout);
1433 int idx = import_at_get_index(imp,
1434 imp->imp_client->cli_request_portal);
1435 timeout = cfs_time_seconds(
1436 at_get(&imp->imp_at.iat_service_estimate[idx]));
1439 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1440 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1441 rc = l_wait_event(imp->imp_recovery_waitq,
1442 !ptlrpc_import_in_recovery(imp), &lwi);
1446 cfs_spin_lock(&imp->imp_lock);
1447 if (imp->imp_state != LUSTRE_IMP_FULL)
1450 cfs_spin_unlock(&imp->imp_lock);
1452 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1453 LUSTRE_OBD_VERSION, rq_opc);
1455 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1456 * it fails. We can get through the above with a down server
1457 * if the client doesn't know the server is gone yet. */
1458 req->rq_no_resend = 1;
1461 /* We want client umounts to happen quickly, no matter the
1463 req->rq_timeout = min_t(int, req->rq_timeout,
1464 INITIAL_CONNECT_TIMEOUT);
1466 /* ... but we always want liblustre clients to nicely
1467 disconnect, so only use the adaptive value. */
1469 req->rq_timeout = obd_timeout / 3;
1472 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1473 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1474 ptlrpc_request_set_replen(req);
1475 rc = ptlrpc_queue_wait(req);
1476 ptlrpc_req_finished(req);
1480 cfs_spin_lock(&imp->imp_lock);
1483 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1485 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1486 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1487 cfs_spin_unlock(&imp->imp_lock);
1492 void ptlrpc_cleanup_imp(struct obd_import *imp)
1496 cfs_spin_lock(&imp->imp_lock);
1497 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1498 imp->imp_generation++;
1499 cfs_spin_unlock(&imp->imp_lock);
1500 ptlrpc_abort_inflight(imp);
1505 /* Adaptive Timeout utils */
1506 extern unsigned int at_min, at_max, at_history;
1508 /* Bin into timeslices using AT_BINS bins.
1509 This gives us a max of the last binlimit*AT_BINS secs without the storage,
1510 but still smoothing out a return to normalcy from a slow response.
1511 (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
1512 int at_measured(struct adaptive_timeout *at, unsigned int val)
1514 unsigned int old = at->at_current;
1515 time_t now = cfs_time_current_sec();
1516 time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
1519 CDEBUG(D_OTHER, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
1520 val, at, now - at->at_binstart, at->at_current,
1521 at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
1524 /* 0's don't count, because we never want our timeout to
1525 drop to 0, and because 0 could mean an error */
1528 cfs_spin_lock(&at->at_lock);
1530 if (unlikely(at->at_binstart == 0)) {
1531 /* Special case to remove default from history */
1532 at->at_current = val;
1533 at->at_worst_ever = val;
1534 at->at_worst_time = now;
1535 at->at_hist[0] = val;
1536 at->at_binstart = now;
1537 } else if (now - at->at_binstart < binlimit ) {
1539 at->at_hist[0] = max(val, at->at_hist[0]);
1540 at->at_current = max(val, at->at_current);
1543 unsigned int maxv = val;
1544 /* move bins over */
1545 shift = (now - at->at_binstart) / binlimit;
1547 for(i = AT_BINS - 1; i >= 0; i--) {
1549 at->at_hist[i] = at->at_hist[i - shift];
1550 maxv = max(maxv, at->at_hist[i]);
1555 at->at_hist[0] = val;
1556 at->at_current = maxv;
1557 at->at_binstart += shift * binlimit;
1560 if (at->at_current > at->at_worst_ever) {
1561 at->at_worst_ever = at->at_current;
1562 at->at_worst_time = now;
1565 if (at->at_flags & AT_FLG_NOHIST)
1566 /* Only keep last reported val; keeping the rest of the history
1568 at->at_current = val;
1571 at->at_current = min(at->at_current, at_max);
1572 at->at_current = max(at->at_current, at_min);
1574 if (at->at_current != old)
1575 CDEBUG(D_OTHER, "AT %p change: old=%u new=%u delta=%d "
1576 "(val=%u) hist %u %u %u %u\n", at,
1577 old, at->at_current, at->at_current - old, val,
1578 at->at_hist[0], at->at_hist[1], at->at_hist[2],
1581 /* if we changed, report the old value */
1582 old = (at->at_current != old) ? old : 0;
1584 cfs_spin_unlock(&at->at_lock);
1588 /* Find the imp_at index for a given portal; assign if space available */
1589 int import_at_get_index(struct obd_import *imp, int portal)
1591 struct imp_at *at = &imp->imp_at;
1594 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1595 if (at->iat_portal[i] == portal)
1597 if (at->iat_portal[i] == 0)
1602 /* Not found in list, add it under a lock */
1603 cfs_spin_lock(&imp->imp_lock);
1605 /* Check unused under lock */
1606 for (; i < IMP_AT_MAX_PORTALS; i++) {
1607 if (at->iat_portal[i] == portal)
1609 if (at->iat_portal[i] == 0)
1614 /* Not enough portals? */
1615 LASSERT(i < IMP_AT_MAX_PORTALS);
1617 at->iat_portal[i] = portal;
1619 cfs_spin_unlock(&imp->imp_lock);