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;
63 * Updates import \a imp current state to provided \a state value
64 * Helper function. Must be called under imp_lock.
66 static void __import_set_state(struct obd_import *imp,
67 enum lustre_imp_state state)
69 imp->imp_state = state;
70 imp->imp_state_hist[imp->imp_state_hist_idx].ish_state = state;
71 imp->imp_state_hist[imp->imp_state_hist_idx].ish_time =
72 cfs_time_current_sec();
73 imp->imp_state_hist_idx = (imp->imp_state_hist_idx + 1) %
77 /* A CLOSED import should remain so. */
78 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
80 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
81 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
82 imp, obd2cli_tgt(imp->imp_obd), \
83 ptlrpc_import_state_name(imp->imp_state), \
84 ptlrpc_import_state_name(state)); \
85 __import_set_state(imp, state); \
89 #define IMPORT_SET_STATE(imp, state) \
91 cfs_spin_lock(&imp->imp_lock); \
92 IMPORT_SET_STATE_NOLOCK(imp, state); \
93 cfs_spin_unlock(&imp->imp_lock); \
97 static int ptlrpc_connect_interpret(const struct lu_env *env,
98 struct ptlrpc_request *request,
100 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
102 /* Only this function is allowed to change the import state when it is
103 * CLOSED. I would rather refcount the import and free it after
104 * disconnection like we do with exports. To do that, the client_obd
105 * will need to save the peer info somewhere other than in the import,
107 int ptlrpc_init_import(struct obd_import *imp)
109 cfs_spin_lock(&imp->imp_lock);
111 imp->imp_generation++;
112 imp->imp_state = LUSTRE_IMP_NEW;
114 cfs_spin_unlock(&imp->imp_lock);
118 EXPORT_SYMBOL(ptlrpc_init_import);
120 #define UUID_STR "_UUID"
121 static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
124 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
125 ? uuid : uuid + strlen(prefix);
127 *uuid_len = strlen(*uuid_start);
129 if (*uuid_len < strlen(UUID_STR))
132 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
133 UUID_STR, strlen(UUID_STR)))
134 *uuid_len -= strlen(UUID_STR);
138 * Returns true if import was FULL, false if import was already not
140 * @imp - import to be disconnected
141 * @conn_cnt - connection count (epoch) of the request that timed out
142 * and caused the disconnection. In some cases, multiple
143 * inflight requests can fail to a single target (e.g. OST
144 * bulk requests) and if one has already caused a reconnection
145 * (increasing the import->conn_cnt) the older failure should
146 * not also cause a reconnection. If zero it forces a reconnect.
148 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
152 cfs_spin_lock(&imp->imp_lock);
154 if (imp->imp_state == LUSTRE_IMP_FULL &&
155 (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
159 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
160 &target_start, &target_len);
162 if (imp->imp_replayable) {
163 LCONSOLE_WARN("%s: Connection to service %.*s via nid "
164 "%s was lost; in progress operations using this "
165 "service will wait for recovery to complete.\n",
166 imp->imp_obd->obd_name, target_len, target_start,
167 libcfs_nid2str(imp->imp_connection->c_peer.nid));
169 LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
170 "%.*s via nid %s was lost; in progress "
171 "operations using this service will fail.\n",
172 imp->imp_obd->obd_name,
173 target_len, target_start,
174 libcfs_nid2str(imp->imp_connection->c_peer.nid));
176 ptlrpc_deactivate_timeouts(imp);
177 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
178 cfs_spin_unlock(&imp->imp_lock);
180 if (obd_dump_on_timeout)
181 libcfs_debug_dumplog();
183 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
186 cfs_spin_unlock(&imp->imp_lock);
187 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
188 imp->imp_client->cli_name, imp,
189 (imp->imp_state == LUSTRE_IMP_FULL &&
190 imp->imp_conn_cnt > conn_cnt) ?
191 "reconnected" : "not connected", imp->imp_conn_cnt,
192 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
198 /* Must be called with imp_lock held! */
199 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
202 LASSERT_SPIN_LOCKED(&imp->imp_lock);
204 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
205 imp->imp_invalid = 1;
206 imp->imp_generation++;
207 cfs_spin_unlock(&imp->imp_lock);
209 ptlrpc_abort_inflight(imp);
210 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
216 * This acts as a barrier; all existing requests are rejected, and
217 * no new requests will be accepted until the import is valid again.
219 void ptlrpc_deactivate_import(struct obd_import *imp)
221 cfs_spin_lock(&imp->imp_lock);
222 ptlrpc_deactivate_and_unlock_import(imp);
226 ptlrpc_inflight_deadline(struct ptlrpc_request *req, time_t now)
230 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
231 (req->rq_phase == RQ_PHASE_BULK) ||
232 (req->rq_phase == RQ_PHASE_NEW)))
235 if (req->rq_timedout)
238 if (req->rq_phase == RQ_PHASE_NEW)
241 dl = req->rq_deadline;
249 static unsigned int ptlrpc_inflight_timeout(struct obd_import *imp)
251 time_t now = cfs_time_current_sec();
253 struct ptlrpc_request *req;
254 unsigned int timeout = 0;
256 cfs_spin_lock(&imp->imp_lock);
257 cfs_list_for_each_safe(tmp, n, &imp->imp_sending_list) {
258 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
259 timeout = max(ptlrpc_inflight_deadline(req, now), timeout);
261 cfs_spin_unlock(&imp->imp_lock);
266 * This function will invalidate the import, if necessary, then block
267 * for all the RPC completions, and finally notify the obd to
268 * invalidate its state (ie cancel locks, clear pending requests,
271 void ptlrpc_invalidate_import(struct obd_import *imp)
274 struct ptlrpc_request *req;
275 struct l_wait_info lwi;
276 unsigned int timeout;
279 cfs_atomic_inc(&imp->imp_inval_count);
281 if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
282 ptlrpc_deactivate_import(imp);
284 LASSERT(imp->imp_invalid);
286 /* Wait forever until inflight == 0. We really can't do it another
287 * way because in some cases we need to wait for very long reply
288 * unlink. We can't do anything before that because there is really
289 * no guarantee that some rdma transfer is not in progress right now. */
291 /* Calculate max timeout for waiting on rpcs to error
292 * out. Use obd_timeout if calculated value is smaller
294 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
295 timeout = ptlrpc_inflight_timeout(imp);
296 timeout += timeout / 3;
299 timeout = obd_timeout;
301 /* decrease the interval to increase race condition */
305 CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n",
308 /* Wait for all requests to error out and call completion
309 * callbacks. Cap it at obd_timeout -- these should all
310 * have been locally cancelled by ptlrpc_abort_inflight. */
311 lwi = LWI_TIMEOUT_INTERVAL(
312 cfs_timeout_cap(cfs_time_seconds(timeout)),
313 (timeout > 1)?cfs_time_seconds(1):cfs_time_seconds(1)/2,
315 rc = l_wait_event(imp->imp_recovery_waitq,
316 (cfs_atomic_read(&imp->imp_inflight) == 0),
319 const char *cli_tgt = obd2cli_tgt(imp->imp_obd);
321 CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
323 cfs_atomic_read(&imp->imp_inflight));
325 cfs_spin_lock(&imp->imp_lock);
326 if (cfs_atomic_read(&imp->imp_inflight) == 0) {
327 int count = cfs_atomic_read(&imp->imp_unregistering);
329 /* We know that "unregistering" rpcs only can
330 * survive in sending or delaying lists (they
331 * maybe waiting for long reply unlink in
332 * sluggish nets). Let's check this. If there
333 * is no inflight and unregistering != 0, this
335 LASSERTF(count == 0, "Some RPCs are still "
336 "unregistering: %d\n", count);
338 /* Let's save one loop as soon as inflight have
339 * dropped to zero. No new inflights possible at
343 cfs_list_for_each_safe(tmp, n,
344 &imp->imp_sending_list) {
345 req = cfs_list_entry(tmp,
346 struct ptlrpc_request,
348 DEBUG_REQ(D_ERROR, req,
349 "still on sending list");
351 cfs_list_for_each_safe(tmp, n,
352 &imp->imp_delayed_list) {
353 req = cfs_list_entry(tmp,
354 struct ptlrpc_request,
356 DEBUG_REQ(D_ERROR, req,
357 "still on delayed list");
360 CERROR("%s: RPCs in \"%s\" phase found (%d). "
361 "Network is sluggish? Waiting them "
362 "to error out.\n", cli_tgt,
363 ptlrpc_phase2str(RQ_PHASE_UNREGISTERING),
364 cfs_atomic_read(&imp->
367 cfs_spin_unlock(&imp->imp_lock);
372 * Let's additionally check that no new rpcs added to import in
373 * "invalidate" state.
375 LASSERT(cfs_atomic_read(&imp->imp_inflight) == 0);
376 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
377 sptlrpc_import_flush_all_ctx(imp);
379 cfs_atomic_dec(&imp->imp_inval_count);
380 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
383 /* unset imp_invalid */
384 void ptlrpc_activate_import(struct obd_import *imp)
386 struct obd_device *obd = imp->imp_obd;
388 cfs_spin_lock(&imp->imp_lock);
389 imp->imp_invalid = 0;
390 ptlrpc_activate_timeouts(imp);
391 cfs_spin_unlock(&imp->imp_lock);
392 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
395 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
399 LASSERT(!imp->imp_dlm_fake);
401 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
402 if (!imp->imp_replayable) {
403 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
404 "auto-deactivating\n",
405 obd2cli_tgt(imp->imp_obd),
406 imp->imp_connection->c_remote_uuid.uuid,
407 imp->imp_obd->obd_name);
408 ptlrpc_deactivate_import(imp);
411 CDEBUG(D_HA, "%s: waking up pinger\n",
412 obd2cli_tgt(imp->imp_obd));
414 cfs_spin_lock(&imp->imp_lock);
415 imp->imp_force_verify = 1;
416 cfs_spin_unlock(&imp->imp_lock);
418 ptlrpc_pinger_wake_up();
423 int ptlrpc_reconnect_import(struct obd_import *imp)
425 ptlrpc_set_import_discon(imp, 0);
426 /* Force a new connect attempt */
427 ptlrpc_invalidate_import(imp);
428 /* Do a fresh connect next time by zeroing the handle */
429 ptlrpc_disconnect_import(imp, 1);
430 /* Wait for all invalidate calls to finish */
431 if (cfs_atomic_read(&imp->imp_inval_count) > 0) {
433 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
434 rc = l_wait_event(imp->imp_recovery_waitq,
435 (cfs_atomic_read(&imp->imp_inval_count) == 0),
438 CERROR("Interrupted, inval=%d\n",
439 cfs_atomic_read(&imp->imp_inval_count));
442 /* Allow reconnect attempts */
443 imp->imp_obd->obd_no_recov = 0;
444 /* Remove 'invalid' flag */
445 ptlrpc_activate_import(imp);
446 /* Attempt a new connect */
447 ptlrpc_recover_import(imp, NULL);
451 EXPORT_SYMBOL(ptlrpc_reconnect_import);
454 * Connection on import \a imp is changed to another one (if more than one is
455 * present). We typically chose connection that we have not tried to connect to
458 static int import_select_connection(struct obd_import *imp)
460 struct obd_import_conn *imp_conn = NULL, *conn;
461 struct obd_export *dlmexp;
465 cfs_spin_lock(&imp->imp_lock);
467 if (cfs_list_empty(&imp->imp_conn_list)) {
468 CERROR("%s: no connections available\n",
469 imp->imp_obd->obd_name);
470 cfs_spin_unlock(&imp->imp_lock);
474 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
475 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
476 imp->imp_obd->obd_name,
477 libcfs_nid2str(conn->oic_conn->c_peer.nid),
478 conn->oic_last_attempt);
479 /* Don't thrash connections */
480 if (cfs_time_before_64(cfs_time_current_64(),
481 conn->oic_last_attempt +
482 cfs_time_seconds(CONNECTION_SWITCH_MIN))) {
486 /* If we have not tried this connection since
487 the last successful attempt, go with this one */
488 if ((conn->oic_last_attempt == 0) ||
489 cfs_time_beforeq_64(conn->oic_last_attempt,
490 imp->imp_last_success_conn)) {
496 /* If all of the connections have already been tried
497 since the last successful connection; just choose the
498 least recently used */
501 else if (cfs_time_before_64(conn->oic_last_attempt,
502 imp_conn->oic_last_attempt))
506 /* if not found, simply choose the current one */
507 if (!imp_conn || imp->imp_force_reconnect) {
508 LASSERT(imp->imp_conn_current);
509 imp_conn = imp->imp_conn_current;
512 LASSERT(imp_conn->oic_conn);
514 /* If we've tried everything, and we're back to the beginning of the
515 list, increase our timeout and try again. It will be reset when
516 we do finally connect. (FIXME: really we should wait for all network
517 state associated with the last connection attempt to drain before
518 trying to reconnect on it.) */
519 if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item)) {
520 if (at_get(&imp->imp_at.iat_net_latency) <
521 CONNECTION_SWITCH_MAX) {
522 at_measured(&imp->imp_at.iat_net_latency,
523 at_get(&imp->imp_at.iat_net_latency) +
524 CONNECTION_SWITCH_INC);
526 LASSERT(imp_conn->oic_last_attempt);
527 CWARN("%s: tried all connections, increasing latency to %ds\n",
528 imp->imp_obd->obd_name,
529 at_get(&imp->imp_at.iat_net_latency));
532 imp_conn->oic_last_attempt = cfs_time_current_64();
534 /* switch connection, don't mind if it's same as the current one */
535 if (imp->imp_connection)
536 ptlrpc_connection_put(imp->imp_connection);
537 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
539 dlmexp = class_conn2export(&imp->imp_dlm_handle);
540 LASSERT(dlmexp != NULL);
541 if (dlmexp->exp_connection)
542 ptlrpc_connection_put(dlmexp->exp_connection);
543 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
544 class_export_put(dlmexp);
546 if (imp->imp_conn_current != imp_conn) {
547 if (imp->imp_conn_current)
548 CDEBUG(D_HA, "Changing connection for %s to %s/%s\n",
549 imp->imp_obd->obd_name, imp_conn->oic_uuid.uuid,
550 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
551 imp->imp_conn_current = imp_conn;
554 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
555 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
556 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
558 cfs_spin_unlock(&imp->imp_lock);
564 * must be called under imp_lock
566 static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
568 struct ptlrpc_request *req;
571 if (cfs_list_empty(&imp->imp_replay_list))
573 tmp = imp->imp_replay_list.next;
574 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
575 *transno = req->rq_transno;
576 if (req->rq_transno == 0) {
577 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
585 * Attempt to (re)connect import \a imp. This includes all preparations,
586 * initializing CONNECT RPC request and passing it to ptlrpcd for
588 * Returns 0 on success or error code.
590 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
592 struct obd_device *obd = imp->imp_obd;
593 int initial_connect = 0;
595 __u64 committed_before_reconnect = 0;
596 struct ptlrpc_request *request;
597 char *bufs[] = { NULL,
598 obd2cli_tgt(imp->imp_obd),
600 (char *)&imp->imp_dlm_handle,
601 (char *)&imp->imp_connect_data };
602 struct ptlrpc_connect_async_args *aa;
606 cfs_spin_lock(&imp->imp_lock);
607 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
608 cfs_spin_unlock(&imp->imp_lock);
609 CERROR("can't connect to a closed import\n");
611 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
612 cfs_spin_unlock(&imp->imp_lock);
613 CERROR("already connected\n");
615 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
616 cfs_spin_unlock(&imp->imp_lock);
617 CERROR("already connecting\n");
621 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
624 imp->imp_resend_replay = 0;
626 if (!lustre_handle_is_used(&imp->imp_remote_handle))
629 committed_before_reconnect = imp->imp_peer_committed_transno;
631 set_transno = ptlrpc_first_transno(imp,
632 &imp->imp_connect_data.ocd_transno);
633 cfs_spin_unlock(&imp->imp_lock);
636 struct obd_uuid uuid;
638 obd_str2uuid(&uuid, new_uuid);
639 rc = import_set_conn_priority(imp, &uuid);
644 rc = import_select_connection(imp);
648 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
652 /* Reset connect flags to the originally requested flags, in case
653 * the server is updated on-the-fly we will get the new features. */
654 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
655 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
656 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
658 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
659 &obd->obd_uuid, &imp->imp_connect_data, NULL);
663 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
665 GOTO(out, rc = -ENOMEM);
667 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
668 imp->imp_connect_op, bufs, NULL);
670 ptlrpc_request_free(request);
674 /* Report the rpc service time to the server so that it knows how long
675 * to wait for clients to join recovery */
676 lustre_msg_set_service_time(request->rq_reqmsg,
677 at_timeout2est(request->rq_timeout));
679 /* The amount of time we give the server to process the connect req.
680 * import_select_connection will increase the net latency on
681 * repeated reconnect attempts to cover slow networks.
682 * We override/ignore the server rpc completion estimate here,
683 * which may be large if this is a reconnect attempt */
684 request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
685 lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
688 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
690 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
692 request->rq_no_resend = request->rq_no_delay = 1;
693 request->rq_send_state = LUSTRE_IMP_CONNECTING;
694 /* Allow a slightly larger reply for future growth compatibility */
695 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
696 sizeof(struct obd_connect_data)+16*sizeof(__u64));
697 ptlrpc_request_set_replen(request);
698 request->rq_interpret_reply = ptlrpc_connect_interpret;
700 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
701 aa = ptlrpc_req_async_args(request);
702 memset(aa, 0, sizeof *aa);
704 aa->pcaa_peer_committed = committed_before_reconnect;
705 aa->pcaa_initial_connect = initial_connect;
707 if (aa->pcaa_initial_connect) {
708 cfs_spin_lock(&imp->imp_lock);
709 imp->imp_replayable = 1;
710 cfs_spin_unlock(&imp->imp_lock);
711 lustre_msg_add_op_flags(request->rq_reqmsg,
712 MSG_CONNECT_INITIAL);
716 lustre_msg_add_op_flags(request->rq_reqmsg,
717 MSG_CONNECT_TRANSNO);
719 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)",
720 request->rq_timeout);
721 ptlrpcd_add_req(request, PSCOPE_OTHER);
725 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
730 EXPORT_SYMBOL(ptlrpc_connect_import);
732 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
735 struct obd_import_conn *imp_conn;
741 cfs_spin_lock(&imp->imp_lock);
742 if (cfs_list_empty(&imp->imp_conn_list))
746 imp_conn = cfs_list_entry(imp->imp_conn_list.prev,
747 struct obd_import_conn,
750 /* XXX: When the failover node is the primary node, it is possible
751 * to have two identical connections in imp_conn_list. We must
752 * compare not conn's pointers but NIDs, otherwise we can defeat
753 * connection throttling. (See bug 14774.) */
754 if (imp->imp_conn_current->oic_conn->c_peer.nid !=
755 imp_conn->oic_conn->c_peer.nid) {
756 ptlrpc_ping_import_soon(imp);
760 /* liblustre has no pinger thread, so we wakeup pinger anyway */
765 cfs_spin_unlock(&imp->imp_lock);
768 ptlrpc_pinger_wake_up();
773 static int ptlrpc_busy_reconnect(int rc)
775 return (rc == -EBUSY) || (rc == -EAGAIN);
779 * interpret_reply callback for connect RPCs.
780 * Looks into returned status of connect operation and decides
781 * what to do with the import - i.e enter recovery, promote it to
782 * full state for normal operations of disconnect it due to an error.
784 static int ptlrpc_connect_interpret(const struct lu_env *env,
785 struct ptlrpc_request *request,
788 struct ptlrpc_connect_async_args *aa = data;
789 struct obd_import *imp = request->rq_import;
790 struct client_obd *cli = &imp->imp_obd->u.cli;
791 struct lustre_handle old_hdl;
792 __u64 old_connect_flags;
796 cfs_spin_lock(&imp->imp_lock);
797 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
798 cfs_spin_unlock(&imp->imp_lock);
803 /* if this reconnect to busy export - not need select new target
805 imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc);
806 cfs_spin_unlock(&imp->imp_lock);
810 LASSERT(imp->imp_conn_current);
812 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
814 /* All imports are pingable */
815 imp->imp_pingable = 1;
816 imp->imp_force_reconnect = 0;
818 if (aa->pcaa_initial_connect) {
819 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
820 imp->imp_replayable = 1;
821 cfs_spin_unlock(&imp->imp_lock);
822 CDEBUG(D_HA, "connected to replayable target: %s\n",
823 obd2cli_tgt(imp->imp_obd));
825 imp->imp_replayable = 0;
826 cfs_spin_unlock(&imp->imp_lock);
829 /* if applies, adjust the imp->imp_msg_magic here
830 * according to reply flags */
832 imp->imp_remote_handle =
833 *lustre_msg_get_handle(request->rq_repmsg);
835 /* Initial connects are allowed for clients with non-random
836 * uuids when servers are in recovery. Simply signal the
837 * servers replay is complete and wait in REPLAY_WAIT. */
838 if (msg_flags & MSG_CONNECT_RECOVERING) {
839 CDEBUG(D_HA, "connect to %s during recovery\n",
840 obd2cli_tgt(imp->imp_obd));
841 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
843 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
844 ptlrpc_activate_import(imp);
847 GOTO(finish, rc = 0);
849 cfs_spin_unlock(&imp->imp_lock);
852 /* Determine what recovery state to move the import to. */
853 if (MSG_CONNECT_RECONNECT & msg_flags) {
854 memset(&old_hdl, 0, sizeof(old_hdl));
855 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
857 CERROR("%s@%s didn't like our handle "LPX64
858 ", failed\n", obd2cli_tgt(imp->imp_obd),
859 imp->imp_connection->c_remote_uuid.uuid,
860 imp->imp_dlm_handle.cookie);
861 GOTO(out, rc = -ENOTCONN);
864 if (memcmp(&imp->imp_remote_handle,
865 lustre_msg_get_handle(request->rq_repmsg),
866 sizeof(imp->imp_remote_handle))) {
867 int level = msg_flags & MSG_CONNECT_RECOVERING ?
870 /* Bug 16611/14775: if server handle have changed,
871 * that means some sort of disconnection happened.
872 * If the server is not in recovery, that also means it
873 * already erased all of our state because of previous
874 * eviction. If it is in recovery - we are safe to
875 * participate since we can reestablish all of our state
876 * with server again */
877 CDEBUG(level,"%s@%s changed server handle from "
878 LPX64" to "LPX64"%s\n",
879 obd2cli_tgt(imp->imp_obd),
880 imp->imp_connection->c_remote_uuid.uuid,
881 imp->imp_remote_handle.cookie,
882 lustre_msg_get_handle(request->rq_repmsg)->
884 (MSG_CONNECT_RECOVERING & msg_flags) ?
885 " but is still in recovery" : "");
887 imp->imp_remote_handle =
888 *lustre_msg_get_handle(request->rq_repmsg);
890 if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
891 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
892 GOTO(finish, rc = 0);
896 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
897 obd2cli_tgt(imp->imp_obd),
898 imp->imp_connection->c_remote_uuid.uuid);
901 if (imp->imp_invalid) {
902 CDEBUG(D_HA, "%s: reconnected but import is invalid; "
903 "marking evicted\n", imp->imp_obd->obd_name);
904 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
905 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
906 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
907 imp->imp_obd->obd_name,
908 obd2cli_tgt(imp->imp_obd));
910 cfs_spin_lock(&imp->imp_lock);
911 imp->imp_resend_replay = 1;
912 cfs_spin_unlock(&imp->imp_lock);
914 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
916 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
918 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
919 LASSERT(imp->imp_replayable);
920 imp->imp_remote_handle =
921 *lustre_msg_get_handle(request->rq_repmsg);
922 imp->imp_last_replay_transno = 0;
923 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
925 DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
926 " not set: %x)", imp->imp_obd->obd_name, msg_flags);
927 imp->imp_remote_handle =
928 *lustre_msg_get_handle(request->rq_repmsg);
929 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
932 /* Sanity checks for a reconnected import. */
933 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
934 CERROR("imp_replayable flag does not match server "
935 "after reconnect. We should LBUG right here.\n");
938 if (lustre_msg_get_last_committed(request->rq_repmsg) > 0 &&
939 lustre_msg_get_last_committed(request->rq_repmsg) <
940 aa->pcaa_peer_committed) {
941 CERROR("%s went back in time (transno "LPD64
942 " was previously committed, server now claims "LPD64
943 ")! See https://bugzilla.lustre.org/show_bug.cgi?"
945 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
946 lustre_msg_get_last_committed(request->rq_repmsg));
950 rc = ptlrpc_import_recovery_state_machine(imp);
952 if (rc == -ENOTCONN) {
953 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
954 "invalidating and reconnecting\n",
955 obd2cli_tgt(imp->imp_obd),
956 imp->imp_connection->c_remote_uuid.uuid);
957 ptlrpc_connect_import(imp, NULL);
961 struct obd_connect_data *ocd;
962 struct obd_export *exp;
964 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
966 /* server replied obd_connect_data is always bigger */
967 ocd = req_capsule_server_sized_get(&request->rq_pill,
968 &RMF_CONNECT_DATA, ret);
970 cfs_spin_lock(&imp->imp_lock);
971 cfs_list_del(&imp->imp_conn_current->oic_item);
972 cfs_list_add(&imp->imp_conn_current->oic_item,
973 &imp->imp_conn_list);
974 imp->imp_last_success_conn =
975 imp->imp_conn_current->oic_last_attempt;
978 cfs_spin_unlock(&imp->imp_lock);
979 CERROR("Wrong connect data from server\n");
984 imp->imp_connect_data = *ocd;
986 exp = class_conn2export(&imp->imp_dlm_handle);
987 cfs_spin_unlock(&imp->imp_lock);
989 /* check that server granted subset of flags we asked for. */
990 LASSERTF((ocd->ocd_connect_flags &
991 imp->imp_connect_flags_orig) ==
992 ocd->ocd_connect_flags, LPX64" != "LPX64,
993 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
996 /* This could happen if export is cleaned during the
998 CERROR("Missing export for %s\n",
999 imp->imp_obd->obd_name);
1000 GOTO(out, rc = -ENODEV);
1002 old_connect_flags = exp->exp_connect_flags;
1003 exp->exp_connect_flags = ocd->ocd_connect_flags;
1004 imp->imp_obd->obd_self_export->exp_connect_flags =
1005 ocd->ocd_connect_flags;
1006 class_export_put(exp);
1008 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
1010 if (!ocd->ocd_ibits_known &&
1011 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
1012 CERROR("Inodebits aware server returned zero compatible"
1015 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1016 (ocd->ocd_version > LUSTRE_VERSION_CODE +
1017 LUSTRE_VERSION_OFFSET_WARN ||
1018 ocd->ocd_version < LUSTRE_VERSION_CODE -
1019 LUSTRE_VERSION_OFFSET_WARN)) {
1020 /* Sigh, some compilers do not like #ifdef in the middle
1021 of macro arguments */
1024 "older. Consider upgrading this client";
1027 "older. Consider recompiling this application";
1029 const char *newer = "newer than client version";
1031 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
1032 "is much %s (%s)\n",
1033 obd2cli_tgt(imp->imp_obd),
1034 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1035 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1036 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1037 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1038 ocd->ocd_version > LUSTRE_VERSION_CODE ?
1039 newer : older, LUSTRE_VERSION_STRING);
1042 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
1043 /* We sent to the server ocd_cksum_types with bits set
1044 * for algorithms we understand. The server masked off
1045 * the checksum types it doesn't support */
1046 if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
1047 LCONSOLE_WARN("The negotiation of the checksum "
1048 "alogrithm to use with server %s "
1049 "failed (%x/%x), disabling "
1051 obd2cli_tgt(imp->imp_obd),
1052 ocd->ocd_cksum_types,
1054 cli->cl_checksum = 0;
1055 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1056 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1058 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
1060 if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
1061 cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
1062 else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
1063 cli->cl_cksum_type = OBD_CKSUM_ADLER;
1065 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1068 /* The server does not support OBD_CONNECT_CKSUM.
1069 * Enforce CRC32 for backward compatibility*/
1070 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1071 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1074 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
1075 cli->cl_max_pages_per_rpc =
1076 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
1079 /* Reset ns_connect_flags only for initial connect. It might be
1080 * changed in while using FS and if we reset it in reconnect
1081 * this leads to losing user settings done before such as
1082 * disable lru_resize, etc. */
1083 if (old_connect_flags != exp->exp_connect_flags ||
1084 aa->pcaa_initial_connect) {
1085 CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
1086 "flags: "LPX64"\n", imp->imp_obd->obd_name,
1087 ocd->ocd_connect_flags);
1088 imp->imp_obd->obd_namespace->ns_connect_flags =
1089 ocd->ocd_connect_flags;
1090 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
1091 ocd->ocd_connect_flags;
1094 if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
1095 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1096 /* We need a per-message support flag, because
1097 a. we don't know if the incoming connect reply
1098 supports AT or not (in reply_in_callback)
1100 b. failovered server means export and flags are gone
1101 (in ptlrpc_send_reply).
1102 Can only be set when we know AT is supported at
1104 imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1106 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1108 if ((ocd->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1109 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1110 imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1112 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1114 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
1115 (cli->cl_max_pages_per_rpc > 0));
1120 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
1121 if (rc == -EACCES) {
1123 * Give up trying to reconnect
1124 * EACCES means client has no permission for connection
1126 imp->imp_obd->obd_no_recov = 1;
1127 ptlrpc_deactivate_import(imp);
1130 if (rc == -EPROTO) {
1131 struct obd_connect_data *ocd;
1133 /* reply message might not be ready */
1134 if (request->rq_repmsg == NULL)
1137 ocd = req_capsule_server_get(&request->rq_pill,
1140 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1141 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
1142 /* Actually servers are only supposed to refuse
1143 connection from liblustre clients, so we should
1144 never see this from VFS context */
1145 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
1147 " refused connection from this client "
1148 "with an incompatible version (%s). "
1149 "Client must be recompiled\n",
1150 obd2cli_tgt(imp->imp_obd),
1151 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1152 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1153 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1154 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1155 LUSTRE_VERSION_STRING);
1156 ptlrpc_deactivate_import(imp);
1157 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
1162 ptlrpc_maybe_ping_import_soon(imp);
1164 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
1165 obd2cli_tgt(imp->imp_obd),
1166 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
1169 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1174 * interpret callback for "completed replay" RPCs.
1175 * \see signal_completed_replay
1177 static int completed_replay_interpret(const struct lu_env *env,
1178 struct ptlrpc_request *req,
1179 void * data, int rc)
1182 cfs_atomic_dec(&req->rq_import->imp_replay_inflight);
1183 if (req->rq_status == 0 &&
1184 !req->rq_import->imp_vbr_failed) {
1185 ptlrpc_import_recovery_state_machine(req->rq_import);
1187 if (req->rq_import->imp_vbr_failed) {
1189 "%s: version recovery fails, reconnecting\n",
1190 req->rq_import->imp_obd->obd_name);
1192 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
1194 req->rq_import->imp_obd->obd_name,
1197 ptlrpc_connect_import(req->rq_import, NULL);
1204 * Let server know that we have no requests to replay anymore.
1205 * Achieved by just sending a PING request
1207 static int signal_completed_replay(struct obd_import *imp)
1209 struct ptlrpc_request *req;
1212 LASSERT(cfs_atomic_read(&imp->imp_replay_inflight) == 0);
1213 cfs_atomic_inc(&imp->imp_replay_inflight);
1215 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
1218 cfs_atomic_dec(&imp->imp_replay_inflight);
1222 ptlrpc_request_set_replen(req);
1223 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
1224 lustre_msg_add_flags(req->rq_reqmsg,
1225 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
1227 req->rq_timeout *= 3;
1228 req->rq_interpret_reply = completed_replay_interpret;
1230 ptlrpcd_add_req(req, PSCOPE_OTHER);
1236 * In kernel code all import invalidation happens in its own
1237 * separate thread, so that whatever application happened to encounter
1238 * a problem could still be killed or otherwise continue
1240 static int ptlrpc_invalidate_import_thread(void *data)
1242 struct obd_import *imp = data;
1246 cfs_daemonize_ctxt("ll_imp_inval");
1248 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1249 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1250 imp->imp_connection->c_remote_uuid.uuid);
1252 ptlrpc_invalidate_import(imp);
1254 if (obd_dump_on_eviction) {
1255 CERROR("dump the log upon eviction\n");
1256 libcfs_debug_dumplog();
1259 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1260 ptlrpc_import_recovery_state_machine(imp);
1262 class_import_put(imp);
1268 * This is the state machine for client-side recovery on import.
1270 * Typicaly we have two possibly paths. If we came to server and it is not
1271 * in recovery, we just enter IMP_EVICTED state, invalidate our import
1272 * state and reconnect from scratch.
1273 * If we came to server that is in recovery, we enter IMP_REPLAY import state.
1274 * We go through our list of requests to replay and send them to server one by
1276 * After sending all request from the list we change import state to
1277 * IMP_REPLAY_LOCKS and re-request all the locks we believe we have from server
1278 * and also all the locks we don't yet have and wait for server to grant us.
1279 * After that we send a special "replay completed" request and change import
1280 * state to IMP_REPLAY_WAIT.
1281 * Upon receiving reply to that "replay completed" RPC we enter IMP_RECOVER
1282 * state and resend all requests from sending list.
1283 * After that we promote import to FULL state and send all delayed requests
1284 * and import is fully operational after that.
1287 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1295 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1296 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1297 &target_start, &target_len);
1298 /* Don't care about MGC eviction */
1299 if (strcmp(imp->imp_obd->obd_type->typ_name,
1300 LUSTRE_MGC_NAME) != 0) {
1301 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
1302 "%.*s; in progress operations using "
1303 "this service will fail.\n",
1304 target_len, target_start);
1306 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1307 obd2cli_tgt(imp->imp_obd),
1308 imp->imp_connection->c_remote_uuid.uuid);
1309 /* reset vbr_failed flag upon eviction */
1310 cfs_spin_lock(&imp->imp_lock);
1311 imp->imp_vbr_failed = 0;
1312 cfs_spin_unlock(&imp->imp_lock);
1315 /* bug 17802: XXX client_disconnect_export vs connect request
1316 * race. if client will evicted at this time, we start
1317 * invalidate thread without reference to import and import can
1318 * be freed at same time. */
1319 class_import_get(imp);
1320 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
1321 CLONE_VM | CLONE_FILES);
1323 class_import_put(imp);
1324 CERROR("error starting invalidate thread: %d\n", rc);
1330 ptlrpc_invalidate_import(imp);
1332 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1336 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1337 CDEBUG(D_HA, "replay requested by %s\n",
1338 obd2cli_tgt(imp->imp_obd));
1339 rc = ptlrpc_replay_next(imp, &inflight);
1340 if (inflight == 0 &&
1341 cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1342 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1343 rc = ldlm_replay_locks(imp);
1350 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1351 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1352 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1353 rc = signal_completed_replay(imp);
1360 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1361 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1362 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1366 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1367 CDEBUG(D_HA, "reconnected to %s@%s\n",
1368 obd2cli_tgt(imp->imp_obd),
1369 imp->imp_connection->c_remote_uuid.uuid);
1371 rc = ptlrpc_resend(imp);
1374 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1375 ptlrpc_activate_import(imp);
1377 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1378 &target_start, &target_len);
1379 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1380 "using nid %s.\n", imp->imp_obd->obd_name,
1381 target_len, target_start,
1382 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1385 if (imp->imp_state == LUSTRE_IMP_FULL) {
1386 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1387 ptlrpc_wake_delayed(imp);
1394 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1396 struct ptlrpc_request *req;
1398 int nowait = imp->imp_obd->obd_force;
1402 GOTO(set_state, rc);
1404 switch (imp->imp_connect_op) {
1405 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1406 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1407 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1409 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1410 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1414 if (ptlrpc_import_in_recovery(imp)) {
1415 struct l_wait_info lwi;
1416 cfs_duration_t timeout;
1420 if (imp->imp_server_timeout)
1421 timeout = cfs_time_seconds(obd_timeout / 2);
1423 timeout = cfs_time_seconds(obd_timeout);
1425 int idx = import_at_get_index(imp,
1426 imp->imp_client->cli_request_portal);
1427 timeout = cfs_time_seconds(
1428 at_get(&imp->imp_at.iat_service_estimate[idx]));
1431 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1432 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1433 rc = l_wait_event(imp->imp_recovery_waitq,
1434 !ptlrpc_import_in_recovery(imp), &lwi);
1438 cfs_spin_lock(&imp->imp_lock);
1439 if (imp->imp_state != LUSTRE_IMP_FULL)
1442 cfs_spin_unlock(&imp->imp_lock);
1444 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1445 LUSTRE_OBD_VERSION, rq_opc);
1447 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1448 * it fails. We can get through the above with a down server
1449 * if the client doesn't know the server is gone yet. */
1450 req->rq_no_resend = 1;
1453 /* We want client umounts to happen quickly, no matter the
1455 req->rq_timeout = min_t(int, req->rq_timeout,
1456 INITIAL_CONNECT_TIMEOUT);
1458 /* ... but we always want liblustre clients to nicely
1459 disconnect, so only use the adaptive value. */
1461 req->rq_timeout = obd_timeout / 3;
1464 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1465 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1466 ptlrpc_request_set_replen(req);
1467 rc = ptlrpc_queue_wait(req);
1468 ptlrpc_req_finished(req);
1472 cfs_spin_lock(&imp->imp_lock);
1475 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1477 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1478 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1479 cfs_spin_unlock(&imp->imp_lock);
1484 void ptlrpc_cleanup_imp(struct obd_import *imp)
1488 cfs_spin_lock(&imp->imp_lock);
1489 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1490 imp->imp_generation++;
1491 cfs_spin_unlock(&imp->imp_lock);
1492 ptlrpc_abort_inflight(imp);
1497 /* Adaptive Timeout utils */
1498 extern unsigned int at_min, at_max, at_history;
1500 /* Bin into timeslices using AT_BINS bins.
1501 This gives us a max of the last binlimit*AT_BINS secs without the storage,
1502 but still smoothing out a return to normalcy from a slow response.
1503 (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
1504 int at_measured(struct adaptive_timeout *at, unsigned int val)
1506 unsigned int old = at->at_current;
1507 time_t now = cfs_time_current_sec();
1508 time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
1511 CDEBUG(D_OTHER, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
1512 val, at, now - at->at_binstart, at->at_current,
1513 at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
1516 /* 0's don't count, because we never want our timeout to
1517 drop to 0, and because 0 could mean an error */
1520 cfs_spin_lock(&at->at_lock);
1522 if (unlikely(at->at_binstart == 0)) {
1523 /* Special case to remove default from history */
1524 at->at_current = val;
1525 at->at_worst_ever = val;
1526 at->at_worst_time = now;
1527 at->at_hist[0] = val;
1528 at->at_binstart = now;
1529 } else if (now - at->at_binstart < binlimit ) {
1531 at->at_hist[0] = max(val, at->at_hist[0]);
1532 at->at_current = max(val, at->at_current);
1535 unsigned int maxv = val;
1536 /* move bins over */
1537 shift = (now - at->at_binstart) / binlimit;
1539 for(i = AT_BINS - 1; i >= 0; i--) {
1541 at->at_hist[i] = at->at_hist[i - shift];
1542 maxv = max(maxv, at->at_hist[i]);
1547 at->at_hist[0] = val;
1548 at->at_current = maxv;
1549 at->at_binstart += shift * binlimit;
1552 if (at->at_current > at->at_worst_ever) {
1553 at->at_worst_ever = at->at_current;
1554 at->at_worst_time = now;
1557 if (at->at_flags & AT_FLG_NOHIST)
1558 /* Only keep last reported val; keeping the rest of the history
1560 at->at_current = val;
1563 at->at_current = min(at->at_current, at_max);
1564 at->at_current = max(at->at_current, at_min);
1566 if (at->at_current != old)
1567 CDEBUG(D_OTHER, "AT %p change: old=%u new=%u delta=%d "
1568 "(val=%u) hist %u %u %u %u\n", at,
1569 old, at->at_current, at->at_current - old, val,
1570 at->at_hist[0], at->at_hist[1], at->at_hist[2],
1573 /* if we changed, report the old value */
1574 old = (at->at_current != old) ? old : 0;
1576 cfs_spin_unlock(&at->at_lock);
1580 /* Find the imp_at index for a given portal; assign if space available */
1581 int import_at_get_index(struct obd_import *imp, int portal)
1583 struct imp_at *at = &imp->imp_at;
1586 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1587 if (at->iat_portal[i] == portal)
1589 if (at->iat_portal[i] == 0)
1594 /* Not found in list, add it under a lock */
1595 cfs_spin_lock(&imp->imp_lock);
1597 /* Check unused under lock */
1598 for (; i < IMP_AT_MAX_PORTALS; i++) {
1599 if (at->iat_portal[i] == portal)
1601 if (at->iat_portal[i] == 0)
1606 /* Not enough portals? */
1607 LASSERT(i < IMP_AT_MAX_PORTALS);
1609 at->iat_portal[i] = portal;
1611 cfs_spin_unlock(&imp->imp_lock);