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 static void __import_set_state(struct obd_import *imp,
63 enum lustre_imp_state state)
65 imp->imp_state = state;
66 imp->imp_state_hist[imp->imp_state_hist_idx].ish_state = state;
67 imp->imp_state_hist[imp->imp_state_hist_idx].ish_time =
68 cfs_time_current_sec();
69 imp->imp_state_hist_idx = (imp->imp_state_hist_idx + 1) %
73 /* A CLOSED import should remain so. */
74 #define IMPORT_SET_STATE_NOLOCK(imp, state) \
76 if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
77 CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
78 imp, obd2cli_tgt(imp->imp_obd), \
79 ptlrpc_import_state_name(imp->imp_state), \
80 ptlrpc_import_state_name(state)); \
81 __import_set_state(imp, state); \
85 #define IMPORT_SET_STATE(imp, state) \
87 cfs_spin_lock(&imp->imp_lock); \
88 IMPORT_SET_STATE_NOLOCK(imp, state); \
89 cfs_spin_unlock(&imp->imp_lock); \
93 static int ptlrpc_connect_interpret(const struct lu_env *env,
94 struct ptlrpc_request *request,
96 int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
98 /* Only this function is allowed to change the import state when it is
99 * CLOSED. I would rather refcount the import and free it after
100 * disconnection like we do with exports. To do that, the client_obd
101 * will need to save the peer info somewhere other than in the import,
103 int ptlrpc_init_import(struct obd_import *imp)
105 cfs_spin_lock(&imp->imp_lock);
107 imp->imp_generation++;
108 imp->imp_state = LUSTRE_IMP_NEW;
110 cfs_spin_unlock(&imp->imp_lock);
114 EXPORT_SYMBOL(ptlrpc_init_import);
116 #define UUID_STR "_UUID"
117 static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
120 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
121 ? uuid : uuid + strlen(prefix);
123 *uuid_len = strlen(*uuid_start);
125 if (*uuid_len < strlen(UUID_STR))
128 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
129 UUID_STR, strlen(UUID_STR)))
130 *uuid_len -= strlen(UUID_STR);
133 /* Returns true if import was FULL, false if import was already not
135 * @imp - import to be disconnected
136 * @conn_cnt - connection count (epoch) of the request that timed out
137 * and caused the disconnection. In some cases, multiple
138 * inflight requests can fail to a single target (e.g. OST
139 * bulk requests) and if one has already caused a reconnection
140 * (increasing the import->conn_cnt) the older failure should
141 * not also cause a reconnection. If zero it forces a reconnect.
143 int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
147 cfs_spin_lock(&imp->imp_lock);
149 if (imp->imp_state == LUSTRE_IMP_FULL &&
150 (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
154 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
155 &target_start, &target_len);
157 if (imp->imp_replayable) {
158 LCONSOLE_WARN("%s: Connection to service %.*s via nid "
159 "%s was lost; in progress operations using this "
160 "service will wait for recovery to complete.\n",
161 imp->imp_obd->obd_name, target_len, target_start,
162 libcfs_nid2str(imp->imp_connection->c_peer.nid));
164 LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
165 "%.*s via nid %s was lost; in progress "
166 "operations using this service will fail.\n",
167 imp->imp_obd->obd_name,
168 target_len, target_start,
169 libcfs_nid2str(imp->imp_connection->c_peer.nid));
171 ptlrpc_deactivate_timeouts(imp);
172 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
173 cfs_spin_unlock(&imp->imp_lock);
175 if (obd_dump_on_timeout)
176 libcfs_debug_dumplog();
178 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
181 cfs_spin_unlock(&imp->imp_lock);
182 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
183 imp->imp_client->cli_name, imp,
184 (imp->imp_state == LUSTRE_IMP_FULL &&
185 imp->imp_conn_cnt > conn_cnt) ?
186 "reconnected" : "not connected", imp->imp_conn_cnt,
187 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
193 /* Must be called with imp_lock held! */
194 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
197 LASSERT_SPIN_LOCKED(&imp->imp_lock);
199 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
200 imp->imp_invalid = 1;
201 imp->imp_generation++;
202 cfs_spin_unlock(&imp->imp_lock);
204 ptlrpc_abort_inflight(imp);
205 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
211 * This acts as a barrier; all existing requests are rejected, and
212 * no new requests will be accepted until the import is valid again.
214 void ptlrpc_deactivate_import(struct obd_import *imp)
216 cfs_spin_lock(&imp->imp_lock);
217 ptlrpc_deactivate_and_unlock_import(imp);
221 ptlrpc_inflight_deadline(struct ptlrpc_request *req, time_t now)
225 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
226 (req->rq_phase == RQ_PHASE_BULK) ||
227 (req->rq_phase == RQ_PHASE_NEW)))
230 if (req->rq_timedout)
233 if (req->rq_phase == RQ_PHASE_NEW)
236 dl = req->rq_deadline;
244 static unsigned int ptlrpc_inflight_timeout(struct obd_import *imp)
246 time_t now = cfs_time_current_sec();
248 struct ptlrpc_request *req;
249 unsigned int timeout = 0;
251 cfs_spin_lock(&imp->imp_lock);
252 cfs_list_for_each_safe(tmp, n, &imp->imp_sending_list) {
253 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
254 timeout = max(ptlrpc_inflight_deadline(req, now), timeout);
256 cfs_spin_unlock(&imp->imp_lock);
261 * This function will invalidate the import, if necessary, then block
262 * for all the RPC completions, and finally notify the obd to
263 * invalidate its state (ie cancel locks, clear pending requests,
266 void ptlrpc_invalidate_import(struct obd_import *imp)
269 struct ptlrpc_request *req;
270 struct l_wait_info lwi;
271 unsigned int timeout;
274 cfs_atomic_inc(&imp->imp_inval_count);
276 if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
277 ptlrpc_deactivate_import(imp);
279 LASSERT(imp->imp_invalid);
281 /* Wait forever until inflight == 0. We really can't do it another
282 * way because in some cases we need to wait for very long reply
283 * unlink. We can't do anything before that because there is really
284 * no guarantee that some rdma transfer is not in progress right now. */
286 /* Calculate max timeout for waiting on rpcs to error
287 * out. Use obd_timeout if calculated value is smaller
289 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
290 timeout = ptlrpc_inflight_timeout(imp);
291 timeout += timeout / 3;
294 timeout = obd_timeout;
296 /* decrease the interval to increase race condition */
300 CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n",
303 /* Wait for all requests to error out and call completion
304 * callbacks. Cap it at obd_timeout -- these should all
305 * have been locally cancelled by ptlrpc_abort_inflight. */
306 lwi = LWI_TIMEOUT_INTERVAL(
307 cfs_timeout_cap(cfs_time_seconds(timeout)),
308 (timeout > 1)?cfs_time_seconds(1):cfs_time_seconds(1)/2,
310 rc = l_wait_event(imp->imp_recovery_waitq,
311 (cfs_atomic_read(&imp->imp_inflight) == 0),
314 const char *cli_tgt = obd2cli_tgt(imp->imp_obd);
316 CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
318 cfs_atomic_read(&imp->imp_inflight));
320 cfs_spin_lock(&imp->imp_lock);
321 if (cfs_atomic_read(&imp->imp_inflight) == 0) {
322 int count = cfs_atomic_read(&imp->imp_unregistering);
324 /* We know that "unregistering" rpcs only can
325 * survive in sending or delaying lists (they
326 * maybe waiting for long reply unlink in
327 * sluggish nets). Let's check this. If there
328 * is no inflight and unregistering != 0, this
330 LASSERTF(count == 0, "Some RPCs are still "
331 "unregistering: %d\n", count);
333 /* Let's save one loop as soon as inflight have
334 * dropped to zero. No new inflights possible at
338 cfs_list_for_each_safe(tmp, n,
339 &imp->imp_sending_list) {
340 req = cfs_list_entry(tmp,
341 struct ptlrpc_request,
343 DEBUG_REQ(D_ERROR, req,
344 "still on sending list");
346 cfs_list_for_each_safe(tmp, n,
347 &imp->imp_delayed_list) {
348 req = cfs_list_entry(tmp,
349 struct ptlrpc_request,
351 DEBUG_REQ(D_ERROR, req,
352 "still on delayed list");
355 CERROR("%s: RPCs in \"%s\" phase found (%d). "
356 "Network is sluggish? Waiting them "
357 "to error out.\n", cli_tgt,
358 ptlrpc_phase2str(RQ_PHASE_UNREGISTERING),
359 cfs_atomic_read(&imp->
362 cfs_spin_unlock(&imp->imp_lock);
367 * Let's additionally check that no new rpcs added to import in
368 * "invalidate" state.
370 LASSERT(cfs_atomic_read(&imp->imp_inflight) == 0);
371 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
372 sptlrpc_import_flush_all_ctx(imp);
374 cfs_atomic_dec(&imp->imp_inval_count);
375 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
378 /* unset imp_invalid */
379 void ptlrpc_activate_import(struct obd_import *imp)
381 struct obd_device *obd = imp->imp_obd;
383 cfs_spin_lock(&imp->imp_lock);
384 imp->imp_invalid = 0;
385 ptlrpc_activate_timeouts(imp);
386 cfs_spin_unlock(&imp->imp_lock);
387 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
390 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
394 LASSERT(!imp->imp_dlm_fake);
396 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
397 if (!imp->imp_replayable) {
398 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
399 "auto-deactivating\n",
400 obd2cli_tgt(imp->imp_obd),
401 imp->imp_connection->c_remote_uuid.uuid,
402 imp->imp_obd->obd_name);
403 ptlrpc_deactivate_import(imp);
406 CDEBUG(D_HA, "%s: waking up pinger\n",
407 obd2cli_tgt(imp->imp_obd));
409 cfs_spin_lock(&imp->imp_lock);
410 imp->imp_force_verify = 1;
411 cfs_spin_unlock(&imp->imp_lock);
413 ptlrpc_pinger_wake_up();
418 int ptlrpc_reconnect_import(struct obd_import *imp)
420 ptlrpc_set_import_discon(imp, 0);
421 /* Force a new connect attempt */
422 ptlrpc_invalidate_import(imp);
423 /* Do a fresh connect next time by zeroing the handle */
424 ptlrpc_disconnect_import(imp, 1);
425 /* Wait for all invalidate calls to finish */
426 if (cfs_atomic_read(&imp->imp_inval_count) > 0) {
428 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
429 rc = l_wait_event(imp->imp_recovery_waitq,
430 (cfs_atomic_read(&imp->imp_inval_count) == 0),
433 CERROR("Interrupted, inval=%d\n",
434 cfs_atomic_read(&imp->imp_inval_count));
437 /* Allow reconnect attempts */
438 imp->imp_obd->obd_no_recov = 0;
439 /* Remove 'invalid' flag */
440 ptlrpc_activate_import(imp);
441 /* Attempt a new connect */
442 ptlrpc_recover_import(imp, NULL);
446 EXPORT_SYMBOL(ptlrpc_reconnect_import);
448 static int import_select_connection(struct obd_import *imp)
450 struct obd_import_conn *imp_conn = NULL, *conn;
451 struct obd_export *dlmexp;
455 cfs_spin_lock(&imp->imp_lock);
457 if (cfs_list_empty(&imp->imp_conn_list)) {
458 CERROR("%s: no connections available\n",
459 imp->imp_obd->obd_name);
460 cfs_spin_unlock(&imp->imp_lock);
464 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
465 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
466 imp->imp_obd->obd_name,
467 libcfs_nid2str(conn->oic_conn->c_peer.nid),
468 conn->oic_last_attempt);
469 /* Don't thrash connections */
470 if (cfs_time_before_64(cfs_time_current_64(),
471 conn->oic_last_attempt +
472 cfs_time_seconds(CONNECTION_SWITCH_MIN))) {
476 /* If we have not tried this connection since
477 the last successful attempt, go with this one */
478 if ((conn->oic_last_attempt == 0) ||
479 cfs_time_beforeq_64(conn->oic_last_attempt,
480 imp->imp_last_success_conn)) {
486 /* If all of the connections have already been tried
487 since the last successful connection; just choose the
488 least recently used */
491 else if (cfs_time_before_64(conn->oic_last_attempt,
492 imp_conn->oic_last_attempt))
496 /* if not found, simply choose the current one */
497 if (!imp_conn || imp->imp_force_reconnect) {
498 LASSERT(imp->imp_conn_current);
499 imp_conn = imp->imp_conn_current;
502 LASSERT(imp_conn->oic_conn);
504 /* If we've tried everything, and we're back to the beginning of the
505 list, increase our timeout and try again. It will be reset when
506 we do finally connect. (FIXME: really we should wait for all network
507 state associated with the last connection attempt to drain before
508 trying to reconnect on it.) */
509 if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item)) {
510 if (at_get(&imp->imp_at.iat_net_latency) <
511 CONNECTION_SWITCH_MAX) {
512 at_measured(&imp->imp_at.iat_net_latency,
513 at_get(&imp->imp_at.iat_net_latency) +
514 CONNECTION_SWITCH_INC);
516 LASSERT(imp_conn->oic_last_attempt);
517 CWARN("%s: tried all connections, increasing latency to %ds\n",
518 imp->imp_obd->obd_name,
519 at_get(&imp->imp_at.iat_net_latency));
522 imp_conn->oic_last_attempt = cfs_time_current_64();
524 /* switch connection, don't mind if it's same as the current one */
525 if (imp->imp_connection)
526 ptlrpc_connection_put(imp->imp_connection);
527 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
529 dlmexp = class_conn2export(&imp->imp_dlm_handle);
530 LASSERT(dlmexp != NULL);
531 if (dlmexp->exp_connection)
532 ptlrpc_connection_put(dlmexp->exp_connection);
533 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
534 class_export_put(dlmexp);
536 if (imp->imp_conn_current != imp_conn) {
537 if (imp->imp_conn_current)
538 CDEBUG(D_HA, "Changing connection for %s to %s/%s\n",
539 imp->imp_obd->obd_name, imp_conn->oic_uuid.uuid,
540 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
541 imp->imp_conn_current = imp_conn;
544 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
545 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
546 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
548 cfs_spin_unlock(&imp->imp_lock);
554 * must be called under imp_lock
556 static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
558 struct ptlrpc_request *req;
561 if (cfs_list_empty(&imp->imp_replay_list))
563 tmp = imp->imp_replay_list.next;
564 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
565 *transno = req->rq_transno;
566 if (req->rq_transno == 0) {
567 DEBUG_REQ(D_ERROR, req, "zero transno in replay");
574 int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
576 struct obd_device *obd = imp->imp_obd;
577 int initial_connect = 0;
579 __u64 committed_before_reconnect = 0;
580 struct ptlrpc_request *request;
581 char *bufs[] = { NULL,
582 obd2cli_tgt(imp->imp_obd),
584 (char *)&imp->imp_dlm_handle,
585 (char *)&imp->imp_connect_data };
586 struct ptlrpc_connect_async_args *aa;
590 cfs_spin_lock(&imp->imp_lock);
591 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
592 cfs_spin_unlock(&imp->imp_lock);
593 CERROR("can't connect to a closed import\n");
595 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
596 cfs_spin_unlock(&imp->imp_lock);
597 CERROR("already connected\n");
599 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
600 cfs_spin_unlock(&imp->imp_lock);
601 CERROR("already connecting\n");
605 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
608 imp->imp_resend_replay = 0;
610 if (!lustre_handle_is_used(&imp->imp_remote_handle))
613 committed_before_reconnect = imp->imp_peer_committed_transno;
615 set_transno = ptlrpc_first_transno(imp,
616 &imp->imp_connect_data.ocd_transno);
617 cfs_spin_unlock(&imp->imp_lock);
620 struct obd_uuid uuid;
622 obd_str2uuid(&uuid, new_uuid);
623 rc = import_set_conn_priority(imp, &uuid);
628 rc = import_select_connection(imp);
632 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
636 /* Reset connect flags to the originally requested flags, in case
637 * the server is updated on-the-fly we will get the new features. */
638 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
639 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
640 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
642 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
643 &obd->obd_uuid, &imp->imp_connect_data, NULL);
647 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
649 GOTO(out, rc = -ENOMEM);
651 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
652 imp->imp_connect_op, bufs, NULL);
654 ptlrpc_request_free(request);
658 /* Report the rpc service time to the server so that it knows how long
659 * to wait for clients to join recovery */
660 lustre_msg_set_service_time(request->rq_reqmsg,
661 at_timeout2est(request->rq_timeout));
663 /* The amount of time we give the server to process the connect req.
664 * import_select_connection will increase the net latency on
665 * repeated reconnect attempts to cover slow networks.
666 * We override/ignore the server rpc completion estimate here,
667 * which may be large if this is a reconnect attempt */
668 request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
669 lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
672 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
674 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
676 request->rq_no_resend = request->rq_no_delay = 1;
677 request->rq_send_state = LUSTRE_IMP_CONNECTING;
678 /* Allow a slightly larger reply for future growth compatibility */
679 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
680 sizeof(struct obd_connect_data)+16*sizeof(__u64));
681 ptlrpc_request_set_replen(request);
682 request->rq_interpret_reply = ptlrpc_connect_interpret;
684 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
685 aa = ptlrpc_req_async_args(request);
686 memset(aa, 0, sizeof *aa);
688 aa->pcaa_peer_committed = committed_before_reconnect;
689 aa->pcaa_initial_connect = initial_connect;
691 if (aa->pcaa_initial_connect) {
692 cfs_spin_lock(&imp->imp_lock);
693 imp->imp_replayable = 1;
694 cfs_spin_unlock(&imp->imp_lock);
695 lustre_msg_add_op_flags(request->rq_reqmsg,
696 MSG_CONNECT_INITIAL);
700 lustre_msg_add_op_flags(request->rq_reqmsg,
701 MSG_CONNECT_TRANSNO);
703 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)",
704 request->rq_timeout);
705 ptlrpcd_add_req(request, PSCOPE_OTHER);
709 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
714 EXPORT_SYMBOL(ptlrpc_connect_import);
716 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
719 struct obd_import_conn *imp_conn;
725 cfs_spin_lock(&imp->imp_lock);
726 if (cfs_list_empty(&imp->imp_conn_list))
730 imp_conn = cfs_list_entry(imp->imp_conn_list.prev,
731 struct obd_import_conn,
734 /* XXX: When the failover node is the primary node, it is possible
735 * to have two identical connections in imp_conn_list. We must
736 * compare not conn's pointers but NIDs, otherwise we can defeat
737 * connection throttling. (See bug 14774.) */
738 if (imp->imp_conn_current->oic_conn->c_peer.nid !=
739 imp_conn->oic_conn->c_peer.nid) {
740 ptlrpc_ping_import_soon(imp);
744 /* liblustre has no pinger thread, so we wakeup pinger anyway */
749 cfs_spin_unlock(&imp->imp_lock);
752 ptlrpc_pinger_wake_up();
757 static int ptlrpc_busy_reconnect(int rc)
759 return (rc == -EBUSY) || (rc == -EAGAIN);
763 static int ptlrpc_connect_interpret(const struct lu_env *env,
764 struct ptlrpc_request *request,
767 struct ptlrpc_connect_async_args *aa = data;
768 struct obd_import *imp = request->rq_import;
769 struct client_obd *cli = &imp->imp_obd->u.cli;
770 struct lustre_handle old_hdl;
771 __u64 old_connect_flags;
775 cfs_spin_lock(&imp->imp_lock);
776 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
777 cfs_spin_unlock(&imp->imp_lock);
782 /* if this reconnect to busy export - not need select new target
784 imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc);
785 cfs_spin_unlock(&imp->imp_lock);
789 LASSERT(imp->imp_conn_current);
791 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
793 /* All imports are pingable */
794 imp->imp_pingable = 1;
795 imp->imp_force_reconnect = 0;
797 if (aa->pcaa_initial_connect) {
798 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
799 imp->imp_replayable = 1;
800 cfs_spin_unlock(&imp->imp_lock);
801 CDEBUG(D_HA, "connected to replayable target: %s\n",
802 obd2cli_tgt(imp->imp_obd));
804 imp->imp_replayable = 0;
805 cfs_spin_unlock(&imp->imp_lock);
808 /* if applies, adjust the imp->imp_msg_magic here
809 * according to reply flags */
811 imp->imp_remote_handle =
812 *lustre_msg_get_handle(request->rq_repmsg);
814 /* Initial connects are allowed for clients with non-random
815 * uuids when servers are in recovery. Simply signal the
816 * servers replay is complete and wait in REPLAY_WAIT. */
817 if (msg_flags & MSG_CONNECT_RECOVERING) {
818 CDEBUG(D_HA, "connect to %s during recovery\n",
819 obd2cli_tgt(imp->imp_obd));
820 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
822 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
823 ptlrpc_activate_import(imp);
826 GOTO(finish, rc = 0);
828 cfs_spin_unlock(&imp->imp_lock);
831 /* Determine what recovery state to move the import to. */
832 if (MSG_CONNECT_RECONNECT & msg_flags) {
833 memset(&old_hdl, 0, sizeof(old_hdl));
834 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
836 CERROR("%s@%s didn't like our handle "LPX64
837 ", failed\n", obd2cli_tgt(imp->imp_obd),
838 imp->imp_connection->c_remote_uuid.uuid,
839 imp->imp_dlm_handle.cookie);
840 GOTO(out, rc = -ENOTCONN);
843 if (memcmp(&imp->imp_remote_handle,
844 lustre_msg_get_handle(request->rq_repmsg),
845 sizeof(imp->imp_remote_handle))) {
846 int level = msg_flags & MSG_CONNECT_RECOVERING ?
849 /* Bug 16611/14775: if server handle have changed,
850 * that means some sort of disconnection happened.
851 * If the server is not in recovery, that also means it
852 * already erased all of our state because of previous
853 * eviction. If it is in recovery - we are safe to
854 * participate since we can reestablish all of our state
855 * with server again */
856 CDEBUG(level,"%s@%s changed server handle from "
857 LPX64" to "LPX64"%s\n",
858 obd2cli_tgt(imp->imp_obd),
859 imp->imp_connection->c_remote_uuid.uuid,
860 imp->imp_remote_handle.cookie,
861 lustre_msg_get_handle(request->rq_repmsg)->
863 (MSG_CONNECT_RECOVERING & msg_flags) ?
864 " but is still in recovery" : "");
866 imp->imp_remote_handle =
867 *lustre_msg_get_handle(request->rq_repmsg);
869 if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
870 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
871 GOTO(finish, rc = 0);
875 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
876 obd2cli_tgt(imp->imp_obd),
877 imp->imp_connection->c_remote_uuid.uuid);
880 if (imp->imp_invalid) {
881 CDEBUG(D_HA, "%s: reconnected but import is invalid; "
882 "marking evicted\n", imp->imp_obd->obd_name);
883 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
884 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
885 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
886 imp->imp_obd->obd_name,
887 obd2cli_tgt(imp->imp_obd));
889 cfs_spin_lock(&imp->imp_lock);
890 imp->imp_resend_replay = 1;
891 cfs_spin_unlock(&imp->imp_lock);
893 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
895 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
897 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
898 LASSERT(imp->imp_replayable);
899 imp->imp_remote_handle =
900 *lustre_msg_get_handle(request->rq_repmsg);
901 imp->imp_last_replay_transno = 0;
902 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
904 DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
905 " not set: %x)", imp->imp_obd->obd_name, msg_flags);
906 imp->imp_remote_handle =
907 *lustre_msg_get_handle(request->rq_repmsg);
908 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
911 /* Sanity checks for a reconnected import. */
912 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
913 CERROR("imp_replayable flag does not match server "
914 "after reconnect. We should LBUG right here.\n");
917 if (lustre_msg_get_last_committed(request->rq_repmsg) > 0 &&
918 lustre_msg_get_last_committed(request->rq_repmsg) <
919 aa->pcaa_peer_committed) {
920 CERROR("%s went back in time (transno "LPD64
921 " was previously committed, server now claims "LPD64
922 ")! See https://bugzilla.lustre.org/show_bug.cgi?"
924 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
925 lustre_msg_get_last_committed(request->rq_repmsg));
929 rc = ptlrpc_import_recovery_state_machine(imp);
931 if (rc == -ENOTCONN) {
932 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
933 "invalidating and reconnecting\n",
934 obd2cli_tgt(imp->imp_obd),
935 imp->imp_connection->c_remote_uuid.uuid);
936 ptlrpc_connect_import(imp, NULL);
940 struct obd_connect_data *ocd;
941 struct obd_export *exp;
943 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
945 /* server replied obd_connect_data is always bigger */
946 ocd = req_capsule_server_sized_get(&request->rq_pill,
947 &RMF_CONNECT_DATA, ret);
949 cfs_spin_lock(&imp->imp_lock);
950 cfs_list_del(&imp->imp_conn_current->oic_item);
951 cfs_list_add(&imp->imp_conn_current->oic_item,
952 &imp->imp_conn_list);
953 imp->imp_last_success_conn =
954 imp->imp_conn_current->oic_last_attempt;
957 cfs_spin_unlock(&imp->imp_lock);
958 CERROR("Wrong connect data from server\n");
963 imp->imp_connect_data = *ocd;
965 exp = class_conn2export(&imp->imp_dlm_handle);
966 cfs_spin_unlock(&imp->imp_lock);
968 /* check that server granted subset of flags we asked for. */
969 LASSERTF((ocd->ocd_connect_flags &
970 imp->imp_connect_flags_orig) ==
971 ocd->ocd_connect_flags, LPX64" != "LPX64,
972 imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
975 /* This could happen if export is cleaned during the
977 CERROR("Missing export for %s\n",
978 imp->imp_obd->obd_name);
979 GOTO(out, rc = -ENODEV);
981 old_connect_flags = exp->exp_connect_flags;
982 exp->exp_connect_flags = ocd->ocd_connect_flags;
983 imp->imp_obd->obd_self_export->exp_connect_flags =
984 ocd->ocd_connect_flags;
985 class_export_put(exp);
987 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
989 if (!ocd->ocd_ibits_known &&
990 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
991 CERROR("Inodebits aware server returned zero compatible"
994 if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
995 (ocd->ocd_version > LUSTRE_VERSION_CODE +
996 LUSTRE_VERSION_OFFSET_WARN ||
997 ocd->ocd_version < LUSTRE_VERSION_CODE -
998 LUSTRE_VERSION_OFFSET_WARN)) {
999 /* Sigh, some compilers do not like #ifdef in the middle
1000 of macro arguments */
1003 "older. Consider upgrading this client";
1006 "older. Consider recompiling this application";
1008 const char *newer = "newer than client version";
1010 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
1011 "is much %s (%s)\n",
1012 obd2cli_tgt(imp->imp_obd),
1013 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1014 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1015 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1016 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1017 ocd->ocd_version > LUSTRE_VERSION_CODE ?
1018 newer : older, LUSTRE_VERSION_STRING);
1021 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
1022 /* We sent to the server ocd_cksum_types with bits set
1023 * for algorithms we understand. The server masked off
1024 * the checksum types it doesn't support */
1025 if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
1026 LCONSOLE_WARN("The negotiation of the checksum "
1027 "alogrithm to use with server %s "
1028 "failed (%x/%x), disabling "
1030 obd2cli_tgt(imp->imp_obd),
1031 ocd->ocd_cksum_types,
1033 cli->cl_checksum = 0;
1034 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1035 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1037 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
1039 if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
1040 cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
1041 else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
1042 cli->cl_cksum_type = OBD_CKSUM_ADLER;
1044 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1047 /* The server does not support OBD_CONNECT_CKSUM.
1048 * Enforce CRC32 for backward compatibility*/
1049 cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
1050 cli->cl_cksum_type = OBD_CKSUM_CRC32;
1053 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
1054 cli->cl_max_pages_per_rpc =
1055 ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
1058 /* Reset ns_connect_flags only for initial connect. It might be
1059 * changed in while using FS and if we reset it in reconnect
1060 * this leads to losing user settings done before such as
1061 * disable lru_resize, etc. */
1062 if (old_connect_flags != exp->exp_connect_flags ||
1063 aa->pcaa_initial_connect) {
1064 CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
1065 "flags: "LPX64"\n", imp->imp_obd->obd_name,
1066 ocd->ocd_connect_flags);
1067 imp->imp_obd->obd_namespace->ns_connect_flags =
1068 ocd->ocd_connect_flags;
1069 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
1070 ocd->ocd_connect_flags;
1073 if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
1074 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1075 /* We need a per-message support flag, because
1076 a. we don't know if the incoming connect reply
1077 supports AT or not (in reply_in_callback)
1079 b. failovered server means export and flags are gone
1080 (in ptlrpc_send_reply).
1081 Can only be set when we know AT is supported at
1083 imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1085 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1087 if ((ocd->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1088 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1089 imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1091 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
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 if (rc == -EACCES) {
1102 * Give up trying to reconnect
1103 * EACCES means client has no permission for connection
1105 imp->imp_obd->obd_no_recov = 1;
1106 ptlrpc_deactivate_import(imp);
1109 if (rc == -EPROTO) {
1110 struct obd_connect_data *ocd;
1112 /* reply message might not be ready */
1113 if (request->rq_repmsg == NULL)
1116 ocd = req_capsule_server_get(&request->rq_pill,
1119 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1120 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
1121 /* Actually servers are only supposed to refuse
1122 connection from liblustre clients, so we should
1123 never see this from VFS context */
1124 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
1126 " refused connection from this client "
1127 "with an incompatible version (%s). "
1128 "Client must be recompiled\n",
1129 obd2cli_tgt(imp->imp_obd),
1130 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1131 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1132 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1133 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1134 LUSTRE_VERSION_STRING);
1135 ptlrpc_deactivate_import(imp);
1136 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
1141 ptlrpc_maybe_ping_import_soon(imp);
1143 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
1144 obd2cli_tgt(imp->imp_obd),
1145 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
1148 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1152 static int completed_replay_interpret(const struct lu_env *env,
1153 struct ptlrpc_request *req,
1154 void * data, int rc)
1157 cfs_atomic_dec(&req->rq_import->imp_replay_inflight);
1158 if (req->rq_status == 0 &&
1159 !req->rq_import->imp_vbr_failed) {
1160 ptlrpc_import_recovery_state_machine(req->rq_import);
1162 if (req->rq_import->imp_vbr_failed) {
1164 "%s: version recovery fails, reconnecting\n",
1165 req->rq_import->imp_obd->obd_name);
1167 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
1169 req->rq_import->imp_obd->obd_name,
1172 ptlrpc_connect_import(req->rq_import, NULL);
1178 static int signal_completed_replay(struct obd_import *imp)
1180 struct ptlrpc_request *req;
1183 LASSERT(cfs_atomic_read(&imp->imp_replay_inflight) == 0);
1184 cfs_atomic_inc(&imp->imp_replay_inflight);
1186 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
1189 cfs_atomic_dec(&imp->imp_replay_inflight);
1193 ptlrpc_request_set_replen(req);
1194 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
1195 lustre_msg_add_flags(req->rq_reqmsg,
1196 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
1198 req->rq_timeout *= 3;
1199 req->rq_interpret_reply = completed_replay_interpret;
1201 ptlrpcd_add_req(req, PSCOPE_OTHER);
1206 static int ptlrpc_invalidate_import_thread(void *data)
1208 struct obd_import *imp = data;
1212 cfs_daemonize_ctxt("ll_imp_inval");
1214 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1215 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1216 imp->imp_connection->c_remote_uuid.uuid);
1218 ptlrpc_invalidate_import(imp);
1220 if (obd_dump_on_eviction) {
1221 CERROR("dump the log upon eviction\n");
1222 libcfs_debug_dumplog();
1225 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1226 ptlrpc_import_recovery_state_machine(imp);
1228 class_import_put(imp);
1233 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1241 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1242 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1243 &target_start, &target_len);
1244 /* Don't care about MGC eviction */
1245 if (strcmp(imp->imp_obd->obd_type->typ_name,
1246 LUSTRE_MGC_NAME) != 0) {
1247 LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
1248 "%.*s; in progress operations using "
1249 "this service will fail.\n",
1250 target_len, target_start);
1252 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1253 obd2cli_tgt(imp->imp_obd),
1254 imp->imp_connection->c_remote_uuid.uuid);
1255 /* reset vbr_failed flag upon eviction */
1256 cfs_spin_lock(&imp->imp_lock);
1257 imp->imp_vbr_failed = 0;
1258 cfs_spin_unlock(&imp->imp_lock);
1261 /* bug 17802: XXX client_disconnect_export vs connect request
1262 * race. if client will evicted at this time, we start
1263 * invalidate thread without reference to import and import can
1264 * be freed at same time. */
1265 class_import_get(imp);
1266 rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
1267 CLONE_VM | CLONE_FILES);
1269 class_import_put(imp);
1270 CERROR("error starting invalidate thread: %d\n", rc);
1276 ptlrpc_invalidate_import(imp);
1278 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1282 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1283 CDEBUG(D_HA, "replay requested by %s\n",
1284 obd2cli_tgt(imp->imp_obd));
1285 rc = ptlrpc_replay_next(imp, &inflight);
1286 if (inflight == 0 &&
1287 cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1288 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1289 rc = ldlm_replay_locks(imp);
1296 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1297 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1298 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1299 rc = signal_completed_replay(imp);
1306 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1307 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1308 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1312 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1313 CDEBUG(D_HA, "reconnected to %s@%s\n",
1314 obd2cli_tgt(imp->imp_obd),
1315 imp->imp_connection->c_remote_uuid.uuid);
1317 rc = ptlrpc_resend(imp);
1320 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1321 ptlrpc_activate_import(imp);
1323 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1324 &target_start, &target_len);
1325 LCONSOLE_INFO("%s: Connection restored to service %.*s "
1326 "using nid %s.\n", imp->imp_obd->obd_name,
1327 target_len, target_start,
1328 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1331 if (imp->imp_state == LUSTRE_IMP_FULL) {
1332 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1333 ptlrpc_wake_delayed(imp);
1340 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1342 struct ptlrpc_request *req;
1344 int nowait = imp->imp_obd->obd_force;
1348 GOTO(set_state, rc);
1350 switch (imp->imp_connect_op) {
1351 case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
1352 case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
1353 case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
1355 CERROR("don't know how to disconnect from %s (connect_op %d)\n",
1356 obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
1360 if (ptlrpc_import_in_recovery(imp)) {
1361 struct l_wait_info lwi;
1362 cfs_duration_t timeout;
1366 if (imp->imp_server_timeout)
1367 timeout = cfs_time_seconds(obd_timeout / 2);
1369 timeout = cfs_time_seconds(obd_timeout);
1371 int idx = import_at_get_index(imp,
1372 imp->imp_client->cli_request_portal);
1373 timeout = cfs_time_seconds(
1374 at_get(&imp->imp_at.iat_service_estimate[idx]));
1377 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1378 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1379 rc = l_wait_event(imp->imp_recovery_waitq,
1380 !ptlrpc_import_in_recovery(imp), &lwi);
1384 cfs_spin_lock(&imp->imp_lock);
1385 if (imp->imp_state != LUSTRE_IMP_FULL)
1388 cfs_spin_unlock(&imp->imp_lock);
1390 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1391 LUSTRE_OBD_VERSION, rq_opc);
1393 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1394 * it fails. We can get through the above with a down server
1395 * if the client doesn't know the server is gone yet. */
1396 req->rq_no_resend = 1;
1399 /* We want client umounts to happen quickly, no matter the
1401 req->rq_timeout = min_t(int, req->rq_timeout,
1402 INITIAL_CONNECT_TIMEOUT);
1404 /* ... but we always want liblustre clients to nicely
1405 disconnect, so only use the adaptive value. */
1407 req->rq_timeout = obd_timeout / 3;
1410 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1411 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1412 ptlrpc_request_set_replen(req);
1413 rc = ptlrpc_queue_wait(req);
1414 ptlrpc_req_finished(req);
1418 cfs_spin_lock(&imp->imp_lock);
1421 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1423 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1424 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1425 cfs_spin_unlock(&imp->imp_lock);
1430 void ptlrpc_cleanup_imp(struct obd_import *imp)
1434 cfs_spin_lock(&imp->imp_lock);
1435 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1436 imp->imp_generation++;
1437 cfs_spin_unlock(&imp->imp_lock);
1438 ptlrpc_abort_inflight(imp);
1443 /* Adaptive Timeout utils */
1444 extern unsigned int at_min, at_max, at_history;
1446 /* Bin into timeslices using AT_BINS bins.
1447 This gives us a max of the last binlimit*AT_BINS secs without the storage,
1448 but still smoothing out a return to normalcy from a slow response.
1449 (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
1450 int at_measured(struct adaptive_timeout *at, unsigned int val)
1452 unsigned int old = at->at_current;
1453 time_t now = cfs_time_current_sec();
1454 time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
1457 CDEBUG(D_OTHER, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
1458 val, at, now - at->at_binstart, at->at_current,
1459 at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
1462 /* 0's don't count, because we never want our timeout to
1463 drop to 0, and because 0 could mean an error */
1466 cfs_spin_lock(&at->at_lock);
1468 if (unlikely(at->at_binstart == 0)) {
1469 /* Special case to remove default from history */
1470 at->at_current = val;
1471 at->at_worst_ever = val;
1472 at->at_worst_time = now;
1473 at->at_hist[0] = val;
1474 at->at_binstart = now;
1475 } else if (now - at->at_binstart < binlimit ) {
1477 at->at_hist[0] = max(val, at->at_hist[0]);
1478 at->at_current = max(val, at->at_current);
1481 unsigned int maxv = val;
1482 /* move bins over */
1483 shift = (now - at->at_binstart) / binlimit;
1485 for(i = AT_BINS - 1; i >= 0; i--) {
1487 at->at_hist[i] = at->at_hist[i - shift];
1488 maxv = max(maxv, at->at_hist[i]);
1493 at->at_hist[0] = val;
1494 at->at_current = maxv;
1495 at->at_binstart += shift * binlimit;
1498 if (at->at_current > at->at_worst_ever) {
1499 at->at_worst_ever = at->at_current;
1500 at->at_worst_time = now;
1503 if (at->at_flags & AT_FLG_NOHIST)
1504 /* Only keep last reported val; keeping the rest of the history
1506 at->at_current = val;
1509 at->at_current = min(at->at_current, at_max);
1510 at->at_current = max(at->at_current, at_min);
1512 if (at->at_current != old)
1513 CDEBUG(D_OTHER, "AT %p change: old=%u new=%u delta=%d "
1514 "(val=%u) hist %u %u %u %u\n", at,
1515 old, at->at_current, at->at_current - old, val,
1516 at->at_hist[0], at->at_hist[1], at->at_hist[2],
1519 /* if we changed, report the old value */
1520 old = (at->at_current != old) ? old : 0;
1522 cfs_spin_unlock(&at->at_lock);
1526 /* Find the imp_at index for a given portal; assign if space available */
1527 int import_at_get_index(struct obd_import *imp, int portal)
1529 struct imp_at *at = &imp->imp_at;
1532 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1533 if (at->iat_portal[i] == portal)
1535 if (at->iat_portal[i] == 0)
1540 /* Not found in list, add it under a lock */
1541 cfs_spin_lock(&imp->imp_lock);
1543 /* Check unused under lock */
1544 for (; i < IMP_AT_MAX_PORTALS; i++) {
1545 if (at->iat_portal[i] == portal)
1547 if (at->iat_portal[i] == 0)
1552 /* Not enough portals? */
1553 LASSERT(i < IMP_AT_MAX_PORTALS);
1555 at->iat_portal[i] = portal;
1557 cfs_spin_unlock(&imp->imp_lock);