4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
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 spin_lock(&imp->imp_lock); \
92 IMPORT_SET_STATE_NOLOCK(imp, state); \
93 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 spin_lock(&imp->imp_lock);
111 imp->imp_generation++;
112 imp->imp_state = LUSTRE_IMP_NEW;
114 spin_unlock(&imp->imp_lock);
118 EXPORT_SYMBOL(ptlrpc_init_import);
120 #define UUID_STR "_UUID"
121 void deuuidify(char *uuid, const char *prefix, char **uuid_start, int *uuid_len)
123 *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
124 ? uuid : uuid + strlen(prefix);
126 *uuid_len = strlen(*uuid_start);
128 if (*uuid_len < strlen(UUID_STR))
131 if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
132 UUID_STR, strlen(UUID_STR)))
133 *uuid_len -= strlen(UUID_STR);
135 EXPORT_SYMBOL(deuuidify);
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 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 %.*s (at %s) was "
164 "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 "
170 "%.*s (at %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 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
177 spin_unlock(&imp->imp_lock);
179 if (obd_dump_on_timeout)
180 libcfs_debug_dumplog();
182 obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
185 spin_unlock(&imp->imp_lock);
186 CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
187 imp->imp_client->cli_name, imp,
188 (imp->imp_state == LUSTRE_IMP_FULL &&
189 imp->imp_conn_cnt > conn_cnt) ?
190 "reconnected" : "not connected", imp->imp_conn_cnt,
191 conn_cnt, ptlrpc_import_state_name(imp->imp_state));
197 /* Must be called with imp_lock held! */
198 static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
201 assert_spin_locked(&imp->imp_lock);
203 CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
204 imp->imp_invalid = 1;
205 imp->imp_generation++;
206 spin_unlock(&imp->imp_lock);
208 ptlrpc_abort_inflight(imp);
209 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
215 * This acts as a barrier; all existing requests are rejected, and
216 * no new requests will be accepted until the import is valid again.
218 void ptlrpc_deactivate_import(struct obd_import *imp)
220 spin_lock(&imp->imp_lock);
221 ptlrpc_deactivate_and_unlock_import(imp);
223 EXPORT_SYMBOL(ptlrpc_deactivate_import);
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 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 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 atomic_inc(&imp->imp_inval_count);
281 if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
282 ptlrpc_deactivate_import(imp);
284 CFS_FAIL_TIMEOUT(OBD_FAIL_MGS_CONNECT_NET, 3 * cfs_fail_val / 2);
285 LASSERT(imp->imp_invalid);
287 /* Wait forever until inflight == 0. We really can't do it another
288 * way because in some cases we need to wait for very long reply
289 * unlink. We can't do anything before that because there is really
290 * no guarantee that some rdma transfer is not in progress right now. */
292 /* Calculate max timeout for waiting on rpcs to error
293 * out. Use obd_timeout if calculated value is smaller
295 if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
296 timeout = ptlrpc_inflight_timeout(imp);
297 timeout += timeout / 3;
300 timeout = obd_timeout;
302 /* decrease the interval to increase race condition */
306 CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n",
309 /* Wait for all requests to error out and call completion
310 * callbacks. Cap it at obd_timeout -- these should all
311 * have been locally cancelled by ptlrpc_abort_inflight. */
312 lwi = LWI_TIMEOUT_INTERVAL(
313 cfs_timeout_cap(cfs_time_seconds(timeout)),
314 (timeout > 1)?cfs_time_seconds(1):cfs_time_seconds(1)/2,
316 rc = l_wait_event(imp->imp_recovery_waitq,
317 (atomic_read(&imp->imp_inflight) == 0),
320 const char *cli_tgt = obd2cli_tgt(imp->imp_obd);
322 CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
323 cli_tgt, rc, atomic_read(&imp->imp_inflight));
325 spin_lock(&imp->imp_lock);
326 if (atomic_read(&imp->imp_inflight) == 0) {
327 int count = 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 atomic_read(&imp->imp_unregistering));
366 spin_unlock(&imp->imp_lock);
371 * Let's additionally check that no new rpcs added to import in
372 * "invalidate" state.
374 LASSERT(atomic_read(&imp->imp_inflight) == 0);
375 obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
376 sptlrpc_import_flush_all_ctx(imp);
378 atomic_dec(&imp->imp_inval_count);
379 wake_up_all(&imp->imp_recovery_waitq);
381 EXPORT_SYMBOL(ptlrpc_invalidate_import);
383 /* unset imp_invalid */
384 void ptlrpc_activate_import(struct obd_import *imp)
386 struct obd_device *obd = imp->imp_obd;
388 spin_lock(&imp->imp_lock);
389 if (imp->imp_deactive != 0) {
390 spin_unlock(&imp->imp_lock);
394 imp->imp_invalid = 0;
395 spin_unlock(&imp->imp_lock);
396 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
398 EXPORT_SYMBOL(ptlrpc_activate_import);
400 static void ptlrpc_pinger_force(struct obd_import *imp)
402 CDEBUG(D_HA, "%s: waking up pinger s:%s\n", obd2cli_tgt(imp->imp_obd),
403 ptlrpc_import_state_name(imp->imp_state));
405 spin_lock(&imp->imp_lock);
406 imp->imp_force_verify = 1;
407 spin_unlock(&imp->imp_lock);
409 if (imp->imp_state != LUSTRE_IMP_CONNECTING)
410 ptlrpc_pinger_wake_up();
413 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
417 LASSERT(!imp->imp_dlm_fake);
419 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
420 if (!imp->imp_replayable) {
421 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
422 "auto-deactivating\n",
423 obd2cli_tgt(imp->imp_obd),
424 imp->imp_connection->c_remote_uuid.uuid,
425 imp->imp_obd->obd_name);
426 ptlrpc_deactivate_import(imp);
429 ptlrpc_pinger_force(imp);
433 EXPORT_SYMBOL(ptlrpc_fail_import);
435 int ptlrpc_reconnect_import(struct obd_import *imp)
438 struct l_wait_info lwi;
439 int secs = cfs_time_seconds(obd_timeout);
442 ptlrpc_pinger_force(imp);
444 CDEBUG(D_HA, "%s: recovery started, waiting %u seconds\n",
445 obd2cli_tgt(imp->imp_obd), secs);
447 lwi = LWI_TIMEOUT(secs, NULL, NULL);
448 rc = l_wait_event(imp->imp_recovery_waitq,
449 !ptlrpc_import_in_recovery(imp), &lwi);
450 CDEBUG(D_HA, "%s: recovery finished s:%s\n", obd2cli_tgt(imp->imp_obd),
451 ptlrpc_import_state_name(imp->imp_state));
454 ptlrpc_set_import_discon(imp, 0);
455 /* Force a new connect attempt */
456 ptlrpc_invalidate_import(imp);
457 /* Do a fresh connect next time by zeroing the handle */
458 ptlrpc_disconnect_import(imp, 1);
459 /* Wait for all invalidate calls to finish */
460 if (atomic_read(&imp->imp_inval_count) > 0) {
461 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
464 rc = l_wait_event(imp->imp_recovery_waitq,
465 (atomic_read(&imp->imp_inval_count) == 0),
468 CERROR("Interrupted, inval=%d\n",
469 atomic_read(&imp->imp_inval_count));
472 /* Allow reconnect attempts */
473 imp->imp_obd->obd_no_recov = 0;
474 /* Remove 'invalid' flag */
475 ptlrpc_activate_import(imp);
476 /* Attempt a new connect */
477 ptlrpc_recover_import(imp, NULL, 0);
481 EXPORT_SYMBOL(ptlrpc_reconnect_import);
484 * Connection on import \a imp is changed to another one (if more than one is
485 * present). We typically chose connection that we have not tried to connect to
488 static int import_select_connection(struct obd_import *imp)
490 struct obd_import_conn *imp_conn = NULL, *conn;
491 struct obd_export *dlmexp;
493 int target_len, tried_all = 1;
496 spin_lock(&imp->imp_lock);
498 if (cfs_list_empty(&imp->imp_conn_list)) {
499 CERROR("%s: no connections available\n",
500 imp->imp_obd->obd_name);
501 spin_unlock(&imp->imp_lock);
505 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
506 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
507 imp->imp_obd->obd_name,
508 libcfs_nid2str(conn->oic_conn->c_peer.nid),
509 conn->oic_last_attempt);
511 /* If we have not tried this connection since
512 the last successful attempt, go with this one */
513 if ((conn->oic_last_attempt == 0) ||
514 cfs_time_beforeq_64(conn->oic_last_attempt,
515 imp->imp_last_success_conn)) {
521 /* If all of the connections have already been tried
522 since the last successful connection; just choose the
523 least recently used */
526 else if (cfs_time_before_64(conn->oic_last_attempt,
527 imp_conn->oic_last_attempt))
531 /* if not found, simply choose the current one */
532 if (!imp_conn || imp->imp_force_reconnect) {
533 LASSERT(imp->imp_conn_current);
534 imp_conn = imp->imp_conn_current;
537 LASSERT(imp_conn->oic_conn);
539 /* If we've tried everything, and we're back to the beginning of the
540 list, increase our timeout and try again. It will be reset when
541 we do finally connect. (FIXME: really we should wait for all network
542 state associated with the last connection attempt to drain before
543 trying to reconnect on it.) */
544 if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item)) {
545 struct adaptive_timeout *at = &imp->imp_at.iat_net_latency;
546 if (at_get(at) < CONNECTION_SWITCH_MAX) {
547 at_measured(at, at_get(at) + CONNECTION_SWITCH_INC);
548 if (at_get(at) > CONNECTION_SWITCH_MAX)
549 at_reset(at, CONNECTION_SWITCH_MAX);
551 LASSERT(imp_conn->oic_last_attempt);
552 CDEBUG(D_HA, "%s: tried all connections, increasing latency "
553 "to %ds\n", imp->imp_obd->obd_name, at_get(at));
556 imp_conn->oic_last_attempt = cfs_time_current_64();
558 /* switch connection, don't mind if it's same as the current one */
559 if (imp->imp_connection)
560 ptlrpc_connection_put(imp->imp_connection);
561 imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
563 dlmexp = class_conn2export(&imp->imp_dlm_handle);
564 LASSERT(dlmexp != NULL);
565 if (dlmexp->exp_connection)
566 ptlrpc_connection_put(dlmexp->exp_connection);
567 dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
568 class_export_put(dlmexp);
570 if (imp->imp_conn_current != imp_conn) {
571 if (imp->imp_conn_current) {
572 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
573 &target_start, &target_len);
575 CDEBUG(D_HA, "%s: Connection changing to"
577 imp->imp_obd->obd_name,
578 target_len, target_start,
579 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
582 imp->imp_conn_current = imp_conn;
585 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
586 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
587 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
589 spin_unlock(&imp->imp_lock);
595 * must be called under imp_lock
597 static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
599 struct ptlrpc_request *req;
602 /* The requests in committed_list always have smaller transnos than
603 * the requests in replay_list */
604 if (!cfs_list_empty(&imp->imp_committed_list)) {
605 tmp = imp->imp_committed_list.next;
606 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
607 *transno = req->rq_transno;
608 if (req->rq_transno == 0) {
609 DEBUG_REQ(D_ERROR, req, "zero transno in committed_list");
614 if (!cfs_list_empty(&imp->imp_replay_list)) {
615 tmp = imp->imp_replay_list.next;
616 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
617 *transno = req->rq_transno;
618 if (req->rq_transno == 0) {
619 DEBUG_REQ(D_ERROR, req, "zero transno in replay_list");
628 * Attempt to (re)connect import \a imp. This includes all preparations,
629 * initializing CONNECT RPC request and passing it to ptlrpcd for
631 * Returns 0 on success or error code.
633 int ptlrpc_connect_import(struct obd_import *imp)
635 struct obd_device *obd = imp->imp_obd;
636 int initial_connect = 0;
638 __u64 committed_before_reconnect = 0;
639 struct ptlrpc_request *request;
640 char *bufs[] = { NULL,
641 obd2cli_tgt(imp->imp_obd),
643 (char *)&imp->imp_dlm_handle,
644 (char *)&imp->imp_connect_data };
645 struct ptlrpc_connect_async_args *aa;
649 spin_lock(&imp->imp_lock);
650 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
651 spin_unlock(&imp->imp_lock);
652 CERROR("can't connect to a closed import\n");
654 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
655 spin_unlock(&imp->imp_lock);
656 CERROR("already connected\n");
658 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
659 spin_unlock(&imp->imp_lock);
660 CERROR("already connecting\n");
664 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
667 imp->imp_resend_replay = 0;
669 if (!lustre_handle_is_used(&imp->imp_remote_handle))
672 committed_before_reconnect = imp->imp_peer_committed_transno;
674 set_transno = ptlrpc_first_transno(imp,
675 &imp->imp_connect_data.ocd_transno);
676 spin_unlock(&imp->imp_lock);
678 rc = import_select_connection(imp);
682 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
686 /* Reset connect flags to the originally requested flags, in case
687 * the server is updated on-the-fly we will get the new features. */
688 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
689 /* Reset ocd_version each time so the server knows the exact versions */
690 imp->imp_connect_data.ocd_version = LUSTRE_VERSION_CODE;
691 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
692 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
694 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
695 &obd->obd_uuid, &imp->imp_connect_data, NULL);
699 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
701 GOTO(out, rc = -ENOMEM);
703 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
704 imp->imp_connect_op, bufs, NULL);
706 ptlrpc_request_free(request);
710 /* Report the rpc service time to the server so that it knows how long
711 * to wait for clients to join recovery */
712 lustre_msg_set_service_time(request->rq_reqmsg,
713 at_timeout2est(request->rq_timeout));
715 /* The amount of time we give the server to process the connect req.
716 * import_select_connection will increase the net latency on
717 * repeated reconnect attempts to cover slow networks.
718 * We override/ignore the server rpc completion estimate here,
719 * which may be large if this is a reconnect attempt */
720 request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
721 lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
724 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
726 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
728 request->rq_no_resend = request->rq_no_delay = 1;
729 request->rq_send_state = LUSTRE_IMP_CONNECTING;
730 /* Allow a slightly larger reply for future growth compatibility */
731 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
732 sizeof(struct obd_connect_data)+16*sizeof(__u64));
733 ptlrpc_request_set_replen(request);
734 request->rq_interpret_reply = ptlrpc_connect_interpret;
736 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
737 aa = ptlrpc_req_async_args(request);
738 memset(aa, 0, sizeof *aa);
740 aa->pcaa_peer_committed = committed_before_reconnect;
741 aa->pcaa_initial_connect = initial_connect;
743 if (aa->pcaa_initial_connect) {
744 spin_lock(&imp->imp_lock);
745 imp->imp_replayable = 1;
746 spin_unlock(&imp->imp_lock);
747 lustre_msg_add_op_flags(request->rq_reqmsg,
748 MSG_CONNECT_INITIAL);
752 lustre_msg_add_op_flags(request->rq_reqmsg,
753 MSG_CONNECT_TRANSNO);
755 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)",
756 request->rq_timeout);
757 ptlrpcd_add_req(request, PDL_POLICY_ROUND, -1);
761 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
766 EXPORT_SYMBOL(ptlrpc_connect_import);
768 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
773 spin_lock(&imp->imp_lock);
774 force_verify = imp->imp_force_verify != 0;
775 spin_unlock(&imp->imp_lock);
778 ptlrpc_pinger_wake_up();
780 /* liblustre has no pinger thread, so we wakeup pinger anyway */
781 ptlrpc_pinger_wake_up();
785 static int ptlrpc_busy_reconnect(int rc)
787 return (rc == -EBUSY) || (rc == -EAGAIN);
791 * interpret_reply callback for connect RPCs.
792 * Looks into returned status of connect operation and decides
793 * what to do with the import - i.e enter recovery, promote it to
794 * full state for normal operations of disconnect it due to an error.
796 static int ptlrpc_connect_interpret(const struct lu_env *env,
797 struct ptlrpc_request *request,
800 struct ptlrpc_connect_async_args *aa = data;
801 struct obd_import *imp = request->rq_import;
802 struct client_obd *cli = &imp->imp_obd->u.cli;
803 struct lustre_handle old_hdl;
804 __u64 old_connect_flags;
806 struct obd_connect_data *ocd;
807 struct obd_export *exp;
811 spin_lock(&imp->imp_lock);
812 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
813 imp->imp_connect_tried = 1;
814 spin_unlock(&imp->imp_lock);
819 /* if this reconnect to busy export - not need select new target
821 imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc);
822 spin_unlock(&imp->imp_lock);
823 ptlrpc_maybe_ping_import_soon(imp);
826 spin_unlock(&imp->imp_lock);
828 LASSERT(imp->imp_conn_current);
830 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
832 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
834 /* server replied obd_connect_data is always bigger */
835 ocd = req_capsule_server_sized_get(&request->rq_pill,
836 &RMF_CONNECT_DATA, ret);
839 CERROR("%s: no connect data from server\n",
840 imp->imp_obd->obd_name);
845 spin_lock(&imp->imp_lock);
847 /* All imports are pingable */
848 imp->imp_pingable = 1;
849 imp->imp_force_reconnect = 0;
850 imp->imp_force_verify = 0;
852 imp->imp_connect_data = *ocd;
854 CDEBUG(D_HA, "%s: connect to target with instance %u\n",
855 imp->imp_obd->obd_name, ocd->ocd_instance);
856 exp = class_conn2export(&imp->imp_dlm_handle);
858 spin_unlock(&imp->imp_lock);
860 /* check that server granted subset of flags we asked for. */
861 if ((ocd->ocd_connect_flags & imp->imp_connect_flags_orig) !=
862 ocd->ocd_connect_flags) {
863 CERROR("%s: Server didn't granted asked subset of flags: "
864 "asked="LPX64" grranted="LPX64"\n",
865 imp->imp_obd->obd_name,imp->imp_connect_flags_orig,
866 ocd->ocd_connect_flags);
867 GOTO(out, rc = -EPROTO);
871 /* This could happen if export is cleaned during the
873 CERROR("%s: missing export after connect\n",
874 imp->imp_obd->obd_name);
875 GOTO(out, rc = -ENODEV);
877 old_connect_flags = exp_connect_flags(exp);
878 exp->exp_connect_data = *ocd;
879 imp->imp_obd->obd_self_export->exp_connect_data = *ocd;
880 class_export_put(exp);
882 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
884 if (aa->pcaa_initial_connect) {
885 spin_lock(&imp->imp_lock);
886 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
887 imp->imp_replayable = 1;
888 spin_unlock(&imp->imp_lock);
889 CDEBUG(D_HA, "connected to replayable target: %s\n",
890 obd2cli_tgt(imp->imp_obd));
892 imp->imp_replayable = 0;
893 spin_unlock(&imp->imp_lock);
896 /* if applies, adjust the imp->imp_msg_magic here
897 * according to reply flags */
899 imp->imp_remote_handle =
900 *lustre_msg_get_handle(request->rq_repmsg);
902 /* Initial connects are allowed for clients with non-random
903 * uuids when servers are in recovery. Simply signal the
904 * servers replay is complete and wait in REPLAY_WAIT. */
905 if (msg_flags & MSG_CONNECT_RECOVERING) {
906 CDEBUG(D_HA, "connect to %s during recovery\n",
907 obd2cli_tgt(imp->imp_obd));
908 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
910 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
911 ptlrpc_activate_import(imp);
914 GOTO(finish, rc = 0);
917 /* Determine what recovery state to move the import to. */
918 if (MSG_CONNECT_RECONNECT & msg_flags) {
919 memset(&old_hdl, 0, sizeof(old_hdl));
920 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
922 LCONSOLE_WARN("Reconnect to %s (at @%s) failed due "
923 "bad handle "LPX64"\n",
924 obd2cli_tgt(imp->imp_obd),
925 imp->imp_connection->c_remote_uuid.uuid,
926 imp->imp_dlm_handle.cookie);
927 GOTO(out, rc = -ENOTCONN);
930 if (memcmp(&imp->imp_remote_handle,
931 lustre_msg_get_handle(request->rq_repmsg),
932 sizeof(imp->imp_remote_handle))) {
933 int level = msg_flags & MSG_CONNECT_RECOVERING ?
936 /* Bug 16611/14775: if server handle have changed,
937 * that means some sort of disconnection happened.
938 * If the server is not in recovery, that also means it
939 * already erased all of our state because of previous
940 * eviction. If it is in recovery - we are safe to
941 * participate since we can reestablish all of our state
942 * with server again */
943 if ((MSG_CONNECT_RECOVERING & msg_flags)) {
944 CDEBUG(level,"%s@%s changed server handle from "
946 " but is still in recovery\n",
947 obd2cli_tgt(imp->imp_obd),
948 imp->imp_connection->c_remote_uuid.uuid,
949 imp->imp_remote_handle.cookie,
950 lustre_msg_get_handle(
951 request->rq_repmsg)->cookie);
953 LCONSOLE_WARN("Evicted from %s (at %s) "
954 "after server handle changed from "
955 LPX64" to "LPX64"\n",
956 obd2cli_tgt(imp->imp_obd),
957 imp->imp_connection-> \
959 imp->imp_remote_handle.cookie,
960 lustre_msg_get_handle(
961 request->rq_repmsg)->cookie);
965 imp->imp_remote_handle =
966 *lustre_msg_get_handle(request->rq_repmsg);
968 if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
969 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
970 GOTO(finish, rc = 0);
974 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
975 obd2cli_tgt(imp->imp_obd),
976 imp->imp_connection->c_remote_uuid.uuid);
979 if (imp->imp_invalid) {
980 CDEBUG(D_HA, "%s: reconnected but import is invalid; "
981 "marking evicted\n", imp->imp_obd->obd_name);
982 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
983 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
984 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
985 imp->imp_obd->obd_name,
986 obd2cli_tgt(imp->imp_obd));
988 spin_lock(&imp->imp_lock);
989 imp->imp_resend_replay = 1;
990 spin_unlock(&imp->imp_lock);
992 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
994 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
996 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
997 LASSERT(imp->imp_replayable);
998 imp->imp_remote_handle =
999 *lustre_msg_get_handle(request->rq_repmsg);
1000 imp->imp_last_replay_transno = 0;
1001 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
1003 DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
1004 " not set: %x)", imp->imp_obd->obd_name, msg_flags);
1005 imp->imp_remote_handle =
1006 *lustre_msg_get_handle(request->rq_repmsg);
1007 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
1010 /* Sanity checks for a reconnected import. */
1011 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
1012 CERROR("imp_replayable flag does not match server "
1013 "after reconnect. We should LBUG right here.\n");
1016 if (lustre_msg_get_last_committed(request->rq_repmsg) > 0 &&
1017 lustre_msg_get_last_committed(request->rq_repmsg) <
1018 aa->pcaa_peer_committed) {
1019 CERROR("%s went back in time (transno "LPD64
1020 " was previously committed, server now claims "LPD64
1021 ")! See https://bugzilla.lustre.org/show_bug.cgi?"
1023 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
1024 lustre_msg_get_last_committed(request->rq_repmsg));
1028 rc = ptlrpc_import_recovery_state_machine(imp);
1030 if (rc == -ENOTCONN) {
1031 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
1032 "invalidating and reconnecting\n",
1033 obd2cli_tgt(imp->imp_obd),
1034 imp->imp_connection->c_remote_uuid.uuid);
1035 ptlrpc_connect_import(imp);
1036 imp->imp_connect_tried = 1;
1042 spin_lock(&imp->imp_lock);
1043 cfs_list_del(&imp->imp_conn_current->oic_item);
1044 cfs_list_add(&imp->imp_conn_current->oic_item,
1045 &imp->imp_conn_list);
1046 imp->imp_last_success_conn =
1047 imp->imp_conn_current->oic_last_attempt;
1049 spin_unlock(&imp->imp_lock);
1051 if (!ocd->ocd_ibits_known &&
1052 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
1053 CERROR("Inodebits aware server returned zero compatible"
1056 if (!warned && (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1057 (ocd->ocd_version > LUSTRE_VERSION_CODE +
1058 LUSTRE_VERSION_OFFSET_WARN ||
1059 ocd->ocd_version < LUSTRE_VERSION_CODE -
1060 LUSTRE_VERSION_OFFSET_WARN)) {
1061 /* Sigh, some compilers do not like #ifdef in the middle
1062 of macro arguments */
1063 const char *older = "older than client. "
1064 "Consider upgrading server";
1066 const char *newer = "newer than client. "
1067 "Consider recompiling application";
1069 const char *newer = "newer than client. "
1070 "Consider upgrading client";
1073 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
1074 "is much %s (%s)\n",
1075 obd2cli_tgt(imp->imp_obd),
1076 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1077 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1078 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1079 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1080 ocd->ocd_version > LUSTRE_VERSION_CODE ?
1081 newer : older, LUSTRE_VERSION_STRING);
1085 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
1086 /* Check if server has LU-1252 fix applied to not always swab
1087 * the IR MNE entries. Do this only once per connection. This
1088 * fixup is version-limited, because we don't want to carry the
1089 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we
1090 * need interop with unpatched 2.2 servers. For newer servers,
1091 * the client will do MNE swabbing only as needed. LU-1644 */
1092 if (unlikely((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1093 !(ocd->ocd_connect_flags & OBD_CONNECT_MNE_SWAB) &&
1094 OBD_OCD_VERSION_MAJOR(ocd->ocd_version) == 2 &&
1095 OBD_OCD_VERSION_MINOR(ocd->ocd_version) == 2 &&
1096 OBD_OCD_VERSION_PATCH(ocd->ocd_version) < 55 &&
1097 strcmp(imp->imp_obd->obd_type->typ_name,
1098 LUSTRE_MGC_NAME) == 0))
1099 imp->imp_need_mne_swab = 1;
1100 else /* clear if server was upgraded since last connect */
1101 imp->imp_need_mne_swab = 0;
1103 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
1106 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
1107 /* We sent to the server ocd_cksum_types with bits set
1108 * for algorithms we understand. The server masked off
1109 * the checksum types it doesn't support */
1110 if ((ocd->ocd_cksum_types &
1111 cksum_types_supported_client()) == 0) {
1112 LCONSOLE_WARN("The negotiation of the checksum "
1113 "alogrithm to use with server %s "
1114 "failed (%x/%x), disabling "
1116 obd2cli_tgt(imp->imp_obd),
1117 ocd->ocd_cksum_types,
1118 cksum_types_supported_client());
1119 cli->cl_checksum = 0;
1120 cli->cl_supp_cksum_types = OBD_CKSUM_ADLER;
1122 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
1125 /* The server does not support OBD_CONNECT_CKSUM.
1126 * Enforce ADLER for backward compatibility*/
1127 cli->cl_supp_cksum_types = OBD_CKSUM_ADLER;
1129 cli->cl_cksum_type =cksum_type_select(cli->cl_supp_cksum_types);
1131 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
1132 cli->cl_max_pages_per_rpc =
1133 min(ocd->ocd_brw_size >> PAGE_CACHE_SHIFT,
1134 cli->cl_max_pages_per_rpc);
1135 else if (imp->imp_connect_op == MDS_CONNECT ||
1136 imp->imp_connect_op == MGS_CONNECT)
1137 cli->cl_max_pages_per_rpc = 1;
1139 /* Reset ns_connect_flags only for initial connect. It might be
1140 * changed in while using FS and if we reset it in reconnect
1141 * this leads to losing user settings done before such as
1142 * disable lru_resize, etc. */
1143 if (old_connect_flags != exp_connect_flags(exp) ||
1144 aa->pcaa_initial_connect) {
1145 CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
1146 "flags: "LPX64"\n", imp->imp_obd->obd_name,
1147 ocd->ocd_connect_flags);
1148 imp->imp_obd->obd_namespace->ns_connect_flags =
1149 ocd->ocd_connect_flags;
1150 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
1151 ocd->ocd_connect_flags;
1154 if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
1155 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1156 /* We need a per-message support flag, because
1157 a. we don't know if the incoming connect reply
1158 supports AT or not (in reply_in_callback)
1160 b. failovered server means export and flags are gone
1161 (in ptlrpc_send_reply).
1162 Can only be set when we know AT is supported at
1164 imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1166 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1168 if ((ocd->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1169 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1170 imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1172 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1174 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
1175 (cli->cl_max_pages_per_rpc > 0));
1179 imp->imp_connect_tried = 1;
1182 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
1183 if (rc == -EACCES) {
1185 * Give up trying to reconnect
1186 * EACCES means client has no permission for connection
1188 imp->imp_obd->obd_no_recov = 1;
1189 ptlrpc_deactivate_import(imp);
1192 if (rc == -EPROTO) {
1193 struct obd_connect_data *ocd;
1195 /* reply message might not be ready */
1196 if (request->rq_repmsg == NULL)
1199 ocd = req_capsule_server_get(&request->rq_pill,
1202 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1203 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
1204 /* Actually servers are only supposed to refuse
1205 connection from liblustre clients, so we should
1206 never see this from VFS context */
1207 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
1209 " refused connection from this client "
1210 "with an incompatible version (%s). "
1211 "Client must be recompiled\n",
1212 obd2cli_tgt(imp->imp_obd),
1213 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1214 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1215 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1216 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1217 LUSTRE_VERSION_STRING);
1218 ptlrpc_deactivate_import(imp);
1219 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
1224 ptlrpc_maybe_ping_import_soon(imp);
1226 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
1227 obd2cli_tgt(imp->imp_obd),
1228 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
1231 wake_up_all(&imp->imp_recovery_waitq);
1236 * interpret callback for "completed replay" RPCs.
1237 * \see signal_completed_replay
1239 static int completed_replay_interpret(const struct lu_env *env,
1240 struct ptlrpc_request *req,
1241 void * data, int rc)
1244 atomic_dec(&req->rq_import->imp_replay_inflight);
1245 if (req->rq_status == 0 &&
1246 !req->rq_import->imp_vbr_failed) {
1247 ptlrpc_import_recovery_state_machine(req->rq_import);
1249 if (req->rq_import->imp_vbr_failed) {
1251 "%s: version recovery fails, reconnecting\n",
1252 req->rq_import->imp_obd->obd_name);
1254 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
1256 req->rq_import->imp_obd->obd_name,
1259 ptlrpc_connect_import(req->rq_import);
1266 * Let server know that we have no requests to replay anymore.
1267 * Achieved by just sending a PING request
1269 static int signal_completed_replay(struct obd_import *imp)
1271 struct ptlrpc_request *req;
1274 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_FINISH_REPLAY)))
1277 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
1278 atomic_inc(&imp->imp_replay_inflight);
1280 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
1283 atomic_dec(&imp->imp_replay_inflight);
1287 ptlrpc_request_set_replen(req);
1288 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
1289 lustre_msg_add_flags(req->rq_reqmsg,
1290 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
1292 req->rq_timeout *= 3;
1293 req->rq_interpret_reply = completed_replay_interpret;
1295 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
1301 * In kernel code all import invalidation happens in its own
1302 * separate thread, so that whatever application happened to encounter
1303 * a problem could still be killed or otherwise continue
1305 static int ptlrpc_invalidate_import_thread(void *data)
1307 struct obd_import *imp = data;
1311 unshare_fs_struct();
1313 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1314 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1315 imp->imp_connection->c_remote_uuid.uuid);
1317 ptlrpc_invalidate_import(imp);
1319 if (obd_dump_on_eviction) {
1320 CERROR("dump the log upon eviction\n");
1321 libcfs_debug_dumplog();
1324 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1325 ptlrpc_import_recovery_state_machine(imp);
1327 class_import_put(imp);
1333 * This is the state machine for client-side recovery on import.
1335 * Typicaly we have two possibly paths. If we came to server and it is not
1336 * in recovery, we just enter IMP_EVICTED state, invalidate our import
1337 * state and reconnect from scratch.
1338 * If we came to server that is in recovery, we enter IMP_REPLAY import state.
1339 * We go through our list of requests to replay and send them to server one by
1341 * After sending all request from the list we change import state to
1342 * IMP_REPLAY_LOCKS and re-request all the locks we believe we have from server
1343 * and also all the locks we don't yet have and wait for server to grant us.
1344 * After that we send a special "replay completed" request and change import
1345 * state to IMP_REPLAY_WAIT.
1346 * Upon receiving reply to that "replay completed" RPC we enter IMP_RECOVER
1347 * state and resend all requests from sending list.
1348 * After that we promote import to FULL state and send all delayed requests
1349 * and import is fully operational after that.
1352 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1360 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1361 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1362 &target_start, &target_len);
1363 /* Don't care about MGC eviction */
1364 if (strcmp(imp->imp_obd->obd_type->typ_name,
1365 LUSTRE_MGC_NAME) != 0) {
1366 LCONSOLE_ERROR_MSG(0x167, "%s: This client was evicted "
1367 "by %.*s; in progress operations "
1368 "using this service will fail.\n",
1369 imp->imp_obd->obd_name, target_len,
1372 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1373 obd2cli_tgt(imp->imp_obd),
1374 imp->imp_connection->c_remote_uuid.uuid);
1375 /* reset vbr_failed flag upon eviction */
1376 spin_lock(&imp->imp_lock);
1377 imp->imp_vbr_failed = 0;
1378 spin_unlock(&imp->imp_lock);
1382 struct task_struct *task;
1383 /* bug 17802: XXX client_disconnect_export vs connect request
1384 * race. if client will evicted at this time, we start
1385 * invalidate thread without reference to import and import can
1386 * be freed at same time. */
1387 class_import_get(imp);
1388 task = kthread_run(ptlrpc_invalidate_import_thread, imp,
1391 class_import_put(imp);
1392 CERROR("error starting invalidate thread: %d\n", rc);
1400 ptlrpc_invalidate_import(imp);
1402 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1406 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1407 CDEBUG(D_HA, "replay requested by %s\n",
1408 obd2cli_tgt(imp->imp_obd));
1409 rc = ptlrpc_replay_next(imp, &inflight);
1410 if (inflight == 0 &&
1411 atomic_read(&imp->imp_replay_inflight) == 0) {
1412 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1413 rc = ldlm_replay_locks(imp);
1420 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1421 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1422 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1423 rc = signal_completed_replay(imp);
1429 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1430 if (atomic_read(&imp->imp_replay_inflight) == 0) {
1431 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1435 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1436 CDEBUG(D_HA, "reconnected to %s@%s\n",
1437 obd2cli_tgt(imp->imp_obd),
1438 imp->imp_connection->c_remote_uuid.uuid);
1440 rc = ptlrpc_resend(imp);
1443 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1444 ptlrpc_activate_import(imp);
1446 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1447 &target_start, &target_len);
1448 LCONSOLE_INFO("%s: Connection restored to %.*s (at %s)\n",
1449 imp->imp_obd->obd_name,
1450 target_len, target_start,
1451 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1454 if (imp->imp_state == LUSTRE_IMP_FULL) {
1455 wake_up_all(&imp->imp_recovery_waitq);
1456 ptlrpc_wake_delayed(imp);
1463 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1465 struct ptlrpc_request *req;
1469 if (imp->imp_obd->obd_force)
1470 GOTO(set_state, rc);
1472 switch (imp->imp_connect_op) {
1474 rq_opc = OST_DISCONNECT;
1477 rq_opc = MDS_DISCONNECT;
1480 rq_opc = MGS_DISCONNECT;
1484 CERROR("%s: don't know how to disconnect from %s "
1485 "(connect_op %d): rc = %d\n",
1486 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1487 imp->imp_connect_op, rc);
1491 if (ptlrpc_import_in_recovery(imp)) {
1492 struct l_wait_info lwi;
1493 cfs_duration_t timeout;
1496 if (imp->imp_server_timeout)
1497 timeout = cfs_time_seconds(obd_timeout / 2);
1499 timeout = cfs_time_seconds(obd_timeout);
1501 int idx = import_at_get_index(imp,
1502 imp->imp_client->cli_request_portal);
1503 timeout = cfs_time_seconds(
1504 at_get(&imp->imp_at.iat_service_estimate[idx]));
1507 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1508 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1509 rc = l_wait_event(imp->imp_recovery_waitq,
1510 !ptlrpc_import_in_recovery(imp), &lwi);
1514 spin_lock(&imp->imp_lock);
1515 if (imp->imp_state != LUSTRE_IMP_FULL)
1517 spin_unlock(&imp->imp_lock);
1519 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1520 LUSTRE_OBD_VERSION, rq_opc);
1522 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1523 * it fails. We can get through the above with a down server
1524 * if the client doesn't know the server is gone yet. */
1525 req->rq_no_resend = 1;
1527 /* We want client umounts to happen quickly, no matter the
1529 req->rq_timeout = min_t(int, req->rq_timeout,
1530 INITIAL_CONNECT_TIMEOUT);
1532 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1533 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1534 ptlrpc_request_set_replen(req);
1535 rc = ptlrpc_queue_wait(req);
1536 ptlrpc_req_finished(req);
1540 spin_lock(&imp->imp_lock);
1543 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1545 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1546 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1547 spin_unlock(&imp->imp_lock);
1549 if (rc == -ETIMEDOUT || rc == -ENOTCONN || rc == -ESHUTDOWN)
1553 EXPORT_SYMBOL(ptlrpc_disconnect_import);
1555 void ptlrpc_cleanup_imp(struct obd_import *imp)
1559 spin_lock(&imp->imp_lock);
1560 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1561 imp->imp_generation++;
1562 spin_unlock(&imp->imp_lock);
1563 ptlrpc_abort_inflight(imp);
1567 EXPORT_SYMBOL(ptlrpc_cleanup_imp);
1569 /* Adaptive Timeout utils */
1570 extern unsigned int at_min, at_max, at_history;
1572 /* Update at_current with the specified value (bounded by at_min and at_max),
1573 * as well as the AT history "bins".
1574 * - Bin into timeslices using AT_BINS bins.
1575 * - This gives us a max of the last at_history seconds without the storage,
1576 * but still smoothing out a return to normalcy from a slow response.
1577 * - (E.g. remember the maximum latency in each minute of the last 4 minutes.)
1579 int at_measured(struct adaptive_timeout *at, unsigned int val)
1581 unsigned int old = at->at_current;
1582 time_t now = cfs_time_current_sec();
1583 time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
1586 CDEBUG(D_OTHER, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
1587 val, at, now - at->at_binstart, at->at_current,
1588 at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
1591 /* 0's don't count, because we never want our timeout to
1592 drop to 0, and because 0 could mean an error */
1595 spin_lock(&at->at_lock);
1597 if (unlikely(at->at_binstart == 0)) {
1598 /* Special case to remove default from history */
1599 at->at_current = val;
1600 at->at_worst_ever = val;
1601 at->at_worst_time = now;
1602 at->at_hist[0] = val;
1603 at->at_binstart = now;
1604 } else if (now - at->at_binstart < binlimit ) {
1606 at->at_hist[0] = max(val, at->at_hist[0]);
1607 at->at_current = max(val, at->at_current);
1610 unsigned int maxv = val;
1611 /* move bins over */
1612 shift = (now - at->at_binstart) / binlimit;
1614 for(i = AT_BINS - 1; i >= 0; i--) {
1616 at->at_hist[i] = at->at_hist[i - shift];
1617 maxv = max(maxv, at->at_hist[i]);
1622 at->at_hist[0] = val;
1623 at->at_current = maxv;
1624 at->at_binstart += shift * binlimit;
1627 if (at->at_current > at->at_worst_ever) {
1628 at->at_worst_ever = at->at_current;
1629 at->at_worst_time = now;
1632 if (at->at_flags & AT_FLG_NOHIST)
1633 /* Only keep last reported val; keeping the rest of the history
1635 at->at_current = val;
1638 at->at_current = min(at->at_current, at_max);
1639 at->at_current = max(at->at_current, at_min);
1641 if (at->at_current != old)
1642 CDEBUG(D_OTHER, "AT %p change: old=%u new=%u delta=%d "
1643 "(val=%u) hist %u %u %u %u\n", at,
1644 old, at->at_current, at->at_current - old, val,
1645 at->at_hist[0], at->at_hist[1], at->at_hist[2],
1648 /* if we changed, report the old value */
1649 old = (at->at_current != old) ? old : 0;
1651 spin_unlock(&at->at_lock);
1655 /* Find the imp_at index for a given portal; assign if space available */
1656 int import_at_get_index(struct obd_import *imp, int portal)
1658 struct imp_at *at = &imp->imp_at;
1661 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1662 if (at->iat_portal[i] == portal)
1664 if (at->iat_portal[i] == 0)
1669 /* Not found in list, add it under a lock */
1670 spin_lock(&imp->imp_lock);
1672 /* Check unused under lock */
1673 for (; i < IMP_AT_MAX_PORTALS; i++) {
1674 if (at->iat_portal[i] == portal)
1676 if (at->iat_portal[i] == 0)
1681 /* Not enough portals? */
1682 LASSERT(i < IMP_AT_MAX_PORTALS);
1684 at->iat_portal[i] = portal;
1686 spin_unlock(&imp->imp_lock);