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 LASSERT(spin_is_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 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 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 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 wake_up_all(&imp->imp_recovery_waitq);
382 EXPORT_SYMBOL(ptlrpc_invalidate_import);
384 /* unset imp_invalid */
385 void ptlrpc_activate_import(struct obd_import *imp)
387 struct obd_device *obd = imp->imp_obd;
389 spin_lock(&imp->imp_lock);
390 if (imp->imp_deactive != 0) {
391 spin_unlock(&imp->imp_lock);
395 imp->imp_invalid = 0;
396 spin_unlock(&imp->imp_lock);
397 obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
399 EXPORT_SYMBOL(ptlrpc_activate_import);
401 void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
405 LASSERT(!imp->imp_dlm_fake);
407 if (ptlrpc_set_import_discon(imp, conn_cnt)) {
408 if (!imp->imp_replayable) {
409 CDEBUG(D_HA, "import %s@%s for %s not replayable, "
410 "auto-deactivating\n",
411 obd2cli_tgt(imp->imp_obd),
412 imp->imp_connection->c_remote_uuid.uuid,
413 imp->imp_obd->obd_name);
414 ptlrpc_deactivate_import(imp);
417 CDEBUG(D_HA, "%s: waking up pinger\n",
418 obd2cli_tgt(imp->imp_obd));
420 spin_lock(&imp->imp_lock);
421 imp->imp_force_verify = 1;
422 spin_unlock(&imp->imp_lock);
424 ptlrpc_pinger_wake_up();
428 EXPORT_SYMBOL(ptlrpc_fail_import);
430 int ptlrpc_reconnect_import(struct obd_import *imp)
432 ptlrpc_set_import_discon(imp, 0);
433 /* Force a new connect attempt */
434 ptlrpc_invalidate_import(imp);
435 /* Do a fresh connect next time by zeroing the handle */
436 ptlrpc_disconnect_import(imp, 1);
437 /* Wait for all invalidate calls to finish */
438 if (cfs_atomic_read(&imp->imp_inval_count) > 0) {
440 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
441 rc = l_wait_event(imp->imp_recovery_waitq,
442 (cfs_atomic_read(&imp->imp_inval_count) == 0),
445 CERROR("Interrupted, inval=%d\n",
446 cfs_atomic_read(&imp->imp_inval_count));
449 /* Allow reconnect attempts */
450 imp->imp_obd->obd_no_recov = 0;
451 /* Remove 'invalid' flag */
452 ptlrpc_activate_import(imp);
453 /* Attempt a new connect */
454 ptlrpc_recover_import(imp, NULL, 0);
457 EXPORT_SYMBOL(ptlrpc_reconnect_import);
460 * Connection on import \a imp is changed to another one (if more than one is
461 * present). We typically chose connection that we have not tried to connect to
464 static int import_select_connection(struct obd_import *imp)
466 struct obd_import_conn *imp_conn = NULL, *conn;
467 struct obd_export *dlmexp;
469 int target_len, tried_all = 1;
472 spin_lock(&imp->imp_lock);
474 if (cfs_list_empty(&imp->imp_conn_list)) {
475 CERROR("%s: no connections available\n",
476 imp->imp_obd->obd_name);
477 spin_unlock(&imp->imp_lock);
481 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
482 CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
483 imp->imp_obd->obd_name,
484 libcfs_nid2str(conn->oic_conn->c_peer.nid),
485 conn->oic_last_attempt);
487 /* If we have not tried this connection since
488 the last successful attempt, go with this one */
489 if ((conn->oic_last_attempt == 0) ||
490 cfs_time_beforeq_64(conn->oic_last_attempt,
491 imp->imp_last_success_conn)) {
497 /* If all of the connections have already been tried
498 since the last successful connection; just choose the
499 least recently used */
502 else if (cfs_time_before_64(conn->oic_last_attempt,
503 imp_conn->oic_last_attempt))
507 /* if not found, simply choose the current one */
508 if (!imp_conn || imp->imp_force_reconnect) {
509 LASSERT(imp->imp_conn_current);
510 imp_conn = imp->imp_conn_current;
513 LASSERT(imp_conn->oic_conn);
515 /* If we've tried everything, and we're back to the beginning of the
516 list, increase our timeout and try again. It will be reset when
517 we do finally connect. (FIXME: really we should wait for all network
518 state associated with the last connection attempt to drain before
519 trying to reconnect on it.) */
520 if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item)) {
521 struct adaptive_timeout *at = &imp->imp_at.iat_net_latency;
522 if (at_get(at) < CONNECTION_SWITCH_MAX) {
523 at_measured(at, at_get(at) + CONNECTION_SWITCH_INC);
524 if (at_get(at) > CONNECTION_SWITCH_MAX)
525 at_reset(at, CONNECTION_SWITCH_MAX);
527 LASSERT(imp_conn->oic_last_attempt);
528 CDEBUG(D_HA, "%s: tried all connections, increasing latency "
529 "to %ds\n", imp->imp_obd->obd_name, at_get(at));
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 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
549 &target_start, &target_len);
551 CDEBUG(D_HA, "%s: Connection changing to"
553 imp->imp_obd->obd_name,
554 target_len, target_start,
555 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
558 imp->imp_conn_current = imp_conn;
561 CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
562 imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
563 libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
565 spin_unlock(&imp->imp_lock);
571 * must be called under imp_lock
573 static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
575 struct ptlrpc_request *req;
578 /* The requests in committed_list always have smaller transnos than
579 * the requests in replay_list */
580 if (!cfs_list_empty(&imp->imp_committed_list)) {
581 tmp = imp->imp_committed_list.next;
582 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
583 *transno = req->rq_transno;
584 if (req->rq_transno == 0) {
585 DEBUG_REQ(D_ERROR, req, "zero transno in committed_list");
590 if (!cfs_list_empty(&imp->imp_replay_list)) {
591 tmp = imp->imp_replay_list.next;
592 req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
593 *transno = req->rq_transno;
594 if (req->rq_transno == 0) {
595 DEBUG_REQ(D_ERROR, req, "zero transno in replay_list");
604 * Attempt to (re)connect import \a imp. This includes all preparations,
605 * initializing CONNECT RPC request and passing it to ptlrpcd for
607 * Returns 0 on success or error code.
609 int ptlrpc_connect_import(struct obd_import *imp)
611 struct obd_device *obd = imp->imp_obd;
612 int initial_connect = 0;
614 __u64 committed_before_reconnect = 0;
615 struct ptlrpc_request *request;
616 char *bufs[] = { NULL,
617 obd2cli_tgt(imp->imp_obd),
619 (char *)&imp->imp_dlm_handle,
620 (char *)&imp->imp_connect_data };
621 struct ptlrpc_connect_async_args *aa;
625 spin_lock(&imp->imp_lock);
626 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
627 spin_unlock(&imp->imp_lock);
628 CERROR("can't connect to a closed import\n");
630 } else if (imp->imp_state == LUSTRE_IMP_FULL) {
631 spin_unlock(&imp->imp_lock);
632 CERROR("already connected\n");
634 } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
635 spin_unlock(&imp->imp_lock);
636 CERROR("already connecting\n");
640 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
643 imp->imp_resend_replay = 0;
645 if (!lustre_handle_is_used(&imp->imp_remote_handle))
648 committed_before_reconnect = imp->imp_peer_committed_transno;
650 set_transno = ptlrpc_first_transno(imp,
651 &imp->imp_connect_data.ocd_transno);
652 spin_unlock(&imp->imp_lock);
654 rc = import_select_connection(imp);
658 rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
662 /* Reset connect flags to the originally requested flags, in case
663 * the server is updated on-the-fly we will get the new features. */
664 imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
665 /* Reset ocd_version each time so the server knows the exact versions */
666 imp->imp_connect_data.ocd_version = LUSTRE_VERSION_CODE;
667 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
668 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
670 rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
671 &obd->obd_uuid, &imp->imp_connect_data, NULL);
675 request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
677 GOTO(out, rc = -ENOMEM);
679 rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
680 imp->imp_connect_op, bufs, NULL);
682 ptlrpc_request_free(request);
686 /* Report the rpc service time to the server so that it knows how long
687 * to wait for clients to join recovery */
688 lustre_msg_set_service_time(request->rq_reqmsg,
689 at_timeout2est(request->rq_timeout));
691 /* The amount of time we give the server to process the connect req.
692 * import_select_connection will increase the net latency on
693 * repeated reconnect attempts to cover slow networks.
694 * We override/ignore the server rpc completion estimate here,
695 * which may be large if this is a reconnect attempt */
696 request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
697 lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
700 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
702 lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
704 request->rq_no_resend = request->rq_no_delay = 1;
705 request->rq_send_state = LUSTRE_IMP_CONNECTING;
706 /* Allow a slightly larger reply for future growth compatibility */
707 req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
708 sizeof(struct obd_connect_data)+16*sizeof(__u64));
709 ptlrpc_request_set_replen(request);
710 request->rq_interpret_reply = ptlrpc_connect_interpret;
712 CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
713 aa = ptlrpc_req_async_args(request);
714 memset(aa, 0, sizeof *aa);
716 aa->pcaa_peer_committed = committed_before_reconnect;
717 aa->pcaa_initial_connect = initial_connect;
719 if (aa->pcaa_initial_connect) {
720 spin_lock(&imp->imp_lock);
721 imp->imp_replayable = 1;
722 spin_unlock(&imp->imp_lock);
723 lustre_msg_add_op_flags(request->rq_reqmsg,
724 MSG_CONNECT_INITIAL);
728 lustre_msg_add_op_flags(request->rq_reqmsg,
729 MSG_CONNECT_TRANSNO);
731 DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)",
732 request->rq_timeout);
733 ptlrpcd_add_req(request, PDL_POLICY_ROUND, -1);
737 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
742 EXPORT_SYMBOL(ptlrpc_connect_import);
744 static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
749 spin_lock(&imp->imp_lock);
750 force_verify = imp->imp_force_verify != 0;
751 spin_unlock(&imp->imp_lock);
754 ptlrpc_pinger_wake_up();
756 /* liblustre has no pinger thread, so we wakeup pinger anyway */
757 ptlrpc_pinger_wake_up();
761 static int ptlrpc_busy_reconnect(int rc)
763 return (rc == -EBUSY) || (rc == -EAGAIN);
767 * interpret_reply callback for connect RPCs.
768 * Looks into returned status of connect operation and decides
769 * what to do with the import - i.e enter recovery, promote it to
770 * full state for normal operations of disconnect it due to an error.
772 static int ptlrpc_connect_interpret(const struct lu_env *env,
773 struct ptlrpc_request *request,
776 struct ptlrpc_connect_async_args *aa = data;
777 struct obd_import *imp = request->rq_import;
778 struct client_obd *cli = &imp->imp_obd->u.cli;
779 struct lustre_handle old_hdl;
780 __u64 old_connect_flags;
782 struct obd_connect_data *ocd;
783 struct obd_export *exp;
787 spin_lock(&imp->imp_lock);
788 if (imp->imp_state == LUSTRE_IMP_CLOSED) {
789 imp->imp_connect_tried = 1;
790 spin_unlock(&imp->imp_lock);
795 /* if this reconnect to busy export - not need select new target
797 imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc);
798 spin_unlock(&imp->imp_lock);
799 ptlrpc_maybe_ping_import_soon(imp);
802 spin_unlock(&imp->imp_lock);
804 LASSERT(imp->imp_conn_current);
806 msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
808 ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
810 /* server replied obd_connect_data is always bigger */
811 ocd = req_capsule_server_sized_get(&request->rq_pill,
812 &RMF_CONNECT_DATA, ret);
815 CERROR("%s: no connect data from server\n",
816 imp->imp_obd->obd_name);
821 spin_lock(&imp->imp_lock);
823 /* All imports are pingable */
824 imp->imp_pingable = 1;
825 imp->imp_force_reconnect = 0;
826 imp->imp_force_verify = 0;
828 imp->imp_connect_data = *ocd;
830 CDEBUG(D_HA, "%s: connect to target with instance %u\n",
831 imp->imp_obd->obd_name, ocd->ocd_instance);
832 exp = class_conn2export(&imp->imp_dlm_handle);
834 spin_unlock(&imp->imp_lock);
836 /* check that server granted subset of flags we asked for. */
837 if ((ocd->ocd_connect_flags & imp->imp_connect_flags_orig) !=
838 ocd->ocd_connect_flags) {
839 CERROR("%s: Server didn't granted asked subset of flags: "
840 "asked="LPX64" grranted="LPX64"\n",
841 imp->imp_obd->obd_name,imp->imp_connect_flags_orig,
842 ocd->ocd_connect_flags);
843 GOTO(out, rc = -EPROTO);
847 /* This could happen if export is cleaned during the
849 CERROR("%s: missing export after connect\n",
850 imp->imp_obd->obd_name);
851 GOTO(out, rc = -ENODEV);
853 old_connect_flags = exp_connect_flags(exp);
854 exp->exp_connect_data = *ocd;
855 imp->imp_obd->obd_self_export->exp_connect_data = *ocd;
856 class_export_put(exp);
858 obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
860 if (aa->pcaa_initial_connect) {
861 spin_lock(&imp->imp_lock);
862 if (msg_flags & MSG_CONNECT_REPLAYABLE) {
863 imp->imp_replayable = 1;
864 spin_unlock(&imp->imp_lock);
865 CDEBUG(D_HA, "connected to replayable target: %s\n",
866 obd2cli_tgt(imp->imp_obd));
868 imp->imp_replayable = 0;
869 spin_unlock(&imp->imp_lock);
872 /* if applies, adjust the imp->imp_msg_magic here
873 * according to reply flags */
875 imp->imp_remote_handle =
876 *lustre_msg_get_handle(request->rq_repmsg);
878 /* Initial connects are allowed for clients with non-random
879 * uuids when servers are in recovery. Simply signal the
880 * servers replay is complete and wait in REPLAY_WAIT. */
881 if (msg_flags & MSG_CONNECT_RECOVERING) {
882 CDEBUG(D_HA, "connect to %s during recovery\n",
883 obd2cli_tgt(imp->imp_obd));
884 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
886 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
887 ptlrpc_activate_import(imp);
890 GOTO(finish, rc = 0);
893 /* Determine what recovery state to move the import to. */
894 if (MSG_CONNECT_RECONNECT & msg_flags) {
895 memset(&old_hdl, 0, sizeof(old_hdl));
896 if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
898 LCONSOLE_WARN("Reconnect to %s (at @%s) failed due "
899 "bad handle "LPX64"\n",
900 obd2cli_tgt(imp->imp_obd),
901 imp->imp_connection->c_remote_uuid.uuid,
902 imp->imp_dlm_handle.cookie);
903 GOTO(out, rc = -ENOTCONN);
906 if (memcmp(&imp->imp_remote_handle,
907 lustre_msg_get_handle(request->rq_repmsg),
908 sizeof(imp->imp_remote_handle))) {
909 int level = msg_flags & MSG_CONNECT_RECOVERING ?
912 /* Bug 16611/14775: if server handle have changed,
913 * that means some sort of disconnection happened.
914 * If the server is not in recovery, that also means it
915 * already erased all of our state because of previous
916 * eviction. If it is in recovery - we are safe to
917 * participate since we can reestablish all of our state
918 * with server again */
919 if ((MSG_CONNECT_RECOVERING & msg_flags)) {
920 CDEBUG(level,"%s@%s changed server handle from "
922 " but is still in recovery\n",
923 obd2cli_tgt(imp->imp_obd),
924 imp->imp_connection->c_remote_uuid.uuid,
925 imp->imp_remote_handle.cookie,
926 lustre_msg_get_handle(
927 request->rq_repmsg)->cookie);
929 LCONSOLE_WARN("Evicted from %s (at %s) "
930 "after server handle changed from "
931 LPX64" to "LPX64"\n",
932 obd2cli_tgt(imp->imp_obd),
933 imp->imp_connection-> \
935 imp->imp_remote_handle.cookie,
936 lustre_msg_get_handle(
937 request->rq_repmsg)->cookie);
941 imp->imp_remote_handle =
942 *lustre_msg_get_handle(request->rq_repmsg);
944 if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
945 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
946 GOTO(finish, rc = 0);
950 CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
951 obd2cli_tgt(imp->imp_obd),
952 imp->imp_connection->c_remote_uuid.uuid);
955 if (imp->imp_invalid) {
956 CDEBUG(D_HA, "%s: reconnected but import is invalid; "
957 "marking evicted\n", imp->imp_obd->obd_name);
958 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
959 } else if (MSG_CONNECT_RECOVERING & msg_flags) {
960 CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
961 imp->imp_obd->obd_name,
962 obd2cli_tgt(imp->imp_obd));
964 spin_lock(&imp->imp_lock);
965 imp->imp_resend_replay = 1;
966 spin_unlock(&imp->imp_lock);
968 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
970 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
972 } else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
973 LASSERT(imp->imp_replayable);
974 imp->imp_remote_handle =
975 *lustre_msg_get_handle(request->rq_repmsg);
976 imp->imp_last_replay_transno = 0;
977 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
979 DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
980 " not set: %x)", imp->imp_obd->obd_name, msg_flags);
981 imp->imp_remote_handle =
982 *lustre_msg_get_handle(request->rq_repmsg);
983 IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
986 /* Sanity checks for a reconnected import. */
987 if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) {
988 CERROR("imp_replayable flag does not match server "
989 "after reconnect. We should LBUG right here.\n");
992 if (lustre_msg_get_last_committed(request->rq_repmsg) > 0 &&
993 lustre_msg_get_last_committed(request->rq_repmsg) <
994 aa->pcaa_peer_committed) {
995 CERROR("%s went back in time (transno "LPD64
996 " was previously committed, server now claims "LPD64
997 ")! See https://bugzilla.lustre.org/show_bug.cgi?"
999 obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
1000 lustre_msg_get_last_committed(request->rq_repmsg));
1004 rc = ptlrpc_import_recovery_state_machine(imp);
1006 if (rc == -ENOTCONN) {
1007 CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
1008 "invalidating and reconnecting\n",
1009 obd2cli_tgt(imp->imp_obd),
1010 imp->imp_connection->c_remote_uuid.uuid);
1011 ptlrpc_connect_import(imp);
1012 imp->imp_connect_tried = 1;
1018 spin_lock(&imp->imp_lock);
1019 cfs_list_del(&imp->imp_conn_current->oic_item);
1020 cfs_list_add(&imp->imp_conn_current->oic_item,
1021 &imp->imp_conn_list);
1022 imp->imp_last_success_conn =
1023 imp->imp_conn_current->oic_last_attempt;
1025 spin_unlock(&imp->imp_lock);
1027 if (!ocd->ocd_ibits_known &&
1028 ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
1029 CERROR("Inodebits aware server returned zero compatible"
1032 if (!warned && (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1033 (ocd->ocd_version > LUSTRE_VERSION_CODE +
1034 LUSTRE_VERSION_OFFSET_WARN ||
1035 ocd->ocd_version < LUSTRE_VERSION_CODE -
1036 LUSTRE_VERSION_OFFSET_WARN)) {
1037 /* Sigh, some compilers do not like #ifdef in the middle
1038 of macro arguments */
1039 const char *older = "older than client. "
1040 "Consider upgrading server";
1042 const char *newer = "newer than client. "
1043 "Consider recompiling application";
1045 const char *newer = "newer than client. "
1046 "Consider upgrading client";
1049 LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
1050 "is much %s (%s)\n",
1051 obd2cli_tgt(imp->imp_obd),
1052 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1053 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1054 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1055 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1056 ocd->ocd_version > LUSTRE_VERSION_CODE ?
1057 newer : older, LUSTRE_VERSION_STRING);
1061 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
1062 /* Check if server has LU-1252 fix applied to not always swab
1063 * the IR MNE entries. Do this only once per connection. This
1064 * fixup is version-limited, because we don't want to carry the
1065 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we
1066 * need interop with unpatched 2.2 servers. For newer servers,
1067 * the client will do MNE swabbing only as needed. LU-1644 */
1068 if (unlikely((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1069 !(ocd->ocd_connect_flags & OBD_CONNECT_MNE_SWAB) &&
1070 OBD_OCD_VERSION_MAJOR(ocd->ocd_version) == 2 &&
1071 OBD_OCD_VERSION_MINOR(ocd->ocd_version) == 2 &&
1072 OBD_OCD_VERSION_PATCH(ocd->ocd_version) < 55 &&
1073 strcmp(imp->imp_obd->obd_type->typ_name,
1074 LUSTRE_MGC_NAME) == 0))
1075 imp->imp_need_mne_swab = 1;
1076 else /* clear if server was upgraded since last connect */
1077 imp->imp_need_mne_swab = 0;
1079 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
1082 if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
1083 /* We sent to the server ocd_cksum_types with bits set
1084 * for algorithms we understand. The server masked off
1085 * the checksum types it doesn't support */
1086 if ((ocd->ocd_cksum_types &
1087 cksum_types_supported_client()) == 0) {
1088 LCONSOLE_WARN("The negotiation of the checksum "
1089 "alogrithm to use with server %s "
1090 "failed (%x/%x), disabling "
1092 obd2cli_tgt(imp->imp_obd),
1093 ocd->ocd_cksum_types,
1094 cksum_types_supported_client());
1095 cli->cl_checksum = 0;
1096 cli->cl_supp_cksum_types = OBD_CKSUM_ADLER;
1098 cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
1101 /* The server does not support OBD_CONNECT_CKSUM.
1102 * Enforce ADLER for backward compatibility*/
1103 cli->cl_supp_cksum_types = OBD_CKSUM_ADLER;
1105 cli->cl_cksum_type =cksum_type_select(cli->cl_supp_cksum_types);
1107 if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
1108 cli->cl_max_pages_per_rpc =
1109 min(ocd->ocd_brw_size >> PAGE_CACHE_SHIFT,
1110 cli->cl_max_pages_per_rpc);
1111 else if (imp->imp_connect_op == MDS_CONNECT ||
1112 imp->imp_connect_op == MGS_CONNECT)
1113 cli->cl_max_pages_per_rpc = 1;
1115 /* Reset ns_connect_flags only for initial connect. It might be
1116 * changed in while using FS and if we reset it in reconnect
1117 * this leads to losing user settings done before such as
1118 * disable lru_resize, etc. */
1119 if (old_connect_flags != exp_connect_flags(exp) ||
1120 aa->pcaa_initial_connect) {
1121 CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
1122 "flags: "LPX64"\n", imp->imp_obd->obd_name,
1123 ocd->ocd_connect_flags);
1124 imp->imp_obd->obd_namespace->ns_connect_flags =
1125 ocd->ocd_connect_flags;
1126 imp->imp_obd->obd_namespace->ns_orig_connect_flags =
1127 ocd->ocd_connect_flags;
1130 if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
1131 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1132 /* We need a per-message support flag, because
1133 a. we don't know if the incoming connect reply
1134 supports AT or not (in reply_in_callback)
1136 b. failovered server means export and flags are gone
1137 (in ptlrpc_send_reply).
1138 Can only be set when we know AT is supported at
1140 imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1142 imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1144 if ((ocd->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1145 (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
1146 imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1148 imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1150 LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
1151 (cli->cl_max_pages_per_rpc > 0));
1155 imp->imp_connect_tried = 1;
1158 IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
1159 if (rc == -EACCES) {
1161 * Give up trying to reconnect
1162 * EACCES means client has no permission for connection
1164 imp->imp_obd->obd_no_recov = 1;
1165 ptlrpc_deactivate_import(imp);
1168 if (rc == -EPROTO) {
1169 struct obd_connect_data *ocd;
1171 /* reply message might not be ready */
1172 if (request->rq_repmsg == NULL)
1175 ocd = req_capsule_server_get(&request->rq_pill,
1178 (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
1179 (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
1180 /* Actually servers are only supposed to refuse
1181 connection from liblustre clients, so we should
1182 never see this from VFS context */
1183 LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
1185 " refused connection from this client "
1186 "with an incompatible version (%s). "
1187 "Client must be recompiled\n",
1188 obd2cli_tgt(imp->imp_obd),
1189 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
1190 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
1191 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
1192 OBD_OCD_VERSION_FIX(ocd->ocd_version),
1193 LUSTRE_VERSION_STRING);
1194 ptlrpc_deactivate_import(imp);
1195 IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
1200 ptlrpc_maybe_ping_import_soon(imp);
1202 CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
1203 obd2cli_tgt(imp->imp_obd),
1204 (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
1207 wake_up_all(&imp->imp_recovery_waitq);
1212 * interpret callback for "completed replay" RPCs.
1213 * \see signal_completed_replay
1215 static int completed_replay_interpret(const struct lu_env *env,
1216 struct ptlrpc_request *req,
1217 void * data, int rc)
1220 cfs_atomic_dec(&req->rq_import->imp_replay_inflight);
1221 if (req->rq_status == 0 &&
1222 !req->rq_import->imp_vbr_failed) {
1223 ptlrpc_import_recovery_state_machine(req->rq_import);
1225 if (req->rq_import->imp_vbr_failed) {
1227 "%s: version recovery fails, reconnecting\n",
1228 req->rq_import->imp_obd->obd_name);
1230 CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
1232 req->rq_import->imp_obd->obd_name,
1235 ptlrpc_connect_import(req->rq_import);
1242 * Let server know that we have no requests to replay anymore.
1243 * Achieved by just sending a PING request
1245 static int signal_completed_replay(struct obd_import *imp)
1247 struct ptlrpc_request *req;
1250 if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_FINISH_REPLAY)))
1253 LASSERT(cfs_atomic_read(&imp->imp_replay_inflight) == 0);
1254 cfs_atomic_inc(&imp->imp_replay_inflight);
1256 req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
1259 cfs_atomic_dec(&imp->imp_replay_inflight);
1263 ptlrpc_request_set_replen(req);
1264 req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
1265 lustre_msg_add_flags(req->rq_reqmsg,
1266 MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
1268 req->rq_timeout *= 3;
1269 req->rq_interpret_reply = completed_replay_interpret;
1271 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
1277 * In kernel code all import invalidation happens in its own
1278 * separate thread, so that whatever application happened to encounter
1279 * a problem could still be killed or otherwise continue
1281 static int ptlrpc_invalidate_import_thread(void *data)
1283 struct obd_import *imp = data;
1287 unshare_fs_struct();
1289 CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
1290 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1291 imp->imp_connection->c_remote_uuid.uuid);
1293 ptlrpc_invalidate_import(imp);
1295 if (obd_dump_on_eviction) {
1296 CERROR("dump the log upon eviction\n");
1297 libcfs_debug_dumplog();
1300 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1301 ptlrpc_import_recovery_state_machine(imp);
1303 class_import_put(imp);
1309 * This is the state machine for client-side recovery on import.
1311 * Typicaly we have two possibly paths. If we came to server and it is not
1312 * in recovery, we just enter IMP_EVICTED state, invalidate our import
1313 * state and reconnect from scratch.
1314 * If we came to server that is in recovery, we enter IMP_REPLAY import state.
1315 * We go through our list of requests to replay and send them to server one by
1317 * After sending all request from the list we change import state to
1318 * IMP_REPLAY_LOCKS and re-request all the locks we believe we have from server
1319 * and also all the locks we don't yet have and wait for server to grant us.
1320 * After that we send a special "replay completed" request and change import
1321 * state to IMP_REPLAY_WAIT.
1322 * Upon receiving reply to that "replay completed" RPC we enter IMP_RECOVER
1323 * state and resend all requests from sending list.
1324 * After that we promote import to FULL state and send all delayed requests
1325 * and import is fully operational after that.
1328 int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
1336 if (imp->imp_state == LUSTRE_IMP_EVICTED) {
1337 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1338 &target_start, &target_len);
1339 /* Don't care about MGC eviction */
1340 if (strcmp(imp->imp_obd->obd_type->typ_name,
1341 LUSTRE_MGC_NAME) != 0) {
1342 LCONSOLE_ERROR_MSG(0x167, "%s: This client was evicted "
1343 "by %.*s; in progress operations "
1344 "using this service will fail.\n",
1345 imp->imp_obd->obd_name, target_len,
1348 CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
1349 obd2cli_tgt(imp->imp_obd),
1350 imp->imp_connection->c_remote_uuid.uuid);
1351 /* reset vbr_failed flag upon eviction */
1352 spin_lock(&imp->imp_lock);
1353 imp->imp_vbr_failed = 0;
1354 spin_unlock(&imp->imp_lock);
1358 struct task_struct *task;
1359 /* bug 17802: XXX client_disconnect_export vs connect request
1360 * race. if client will evicted at this time, we start
1361 * invalidate thread without reference to import and import can
1362 * be freed at same time. */
1363 class_import_get(imp);
1364 task = kthread_run(ptlrpc_invalidate_import_thread, imp,
1367 class_import_put(imp);
1368 CERROR("error starting invalidate thread: %d\n", rc);
1376 ptlrpc_invalidate_import(imp);
1378 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1382 if (imp->imp_state == LUSTRE_IMP_REPLAY) {
1383 CDEBUG(D_HA, "replay requested by %s\n",
1384 obd2cli_tgt(imp->imp_obd));
1385 rc = ptlrpc_replay_next(imp, &inflight);
1386 if (inflight == 0 &&
1387 cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1388 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
1389 rc = ldlm_replay_locks(imp);
1396 if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
1397 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1398 IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
1399 rc = signal_completed_replay(imp);
1406 if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
1407 if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
1408 IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
1412 if (imp->imp_state == LUSTRE_IMP_RECOVER) {
1413 CDEBUG(D_HA, "reconnected to %s@%s\n",
1414 obd2cli_tgt(imp->imp_obd),
1415 imp->imp_connection->c_remote_uuid.uuid);
1417 rc = ptlrpc_resend(imp);
1420 IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
1421 ptlrpc_activate_import(imp);
1423 deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
1424 &target_start, &target_len);
1425 LCONSOLE_INFO("%s: Connection restored to %.*s (at %s)\n",
1426 imp->imp_obd->obd_name,
1427 target_len, target_start,
1428 libcfs_nid2str(imp->imp_connection->c_peer.nid));
1431 if (imp->imp_state == LUSTRE_IMP_FULL) {
1432 wake_up_all(&imp->imp_recovery_waitq);
1433 ptlrpc_wake_delayed(imp);
1440 int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
1442 struct ptlrpc_request *req;
1446 if (imp->imp_obd->obd_force)
1447 GOTO(set_state, rc);
1449 switch (imp->imp_connect_op) {
1451 rq_opc = OST_DISCONNECT;
1454 rq_opc = MDS_DISCONNECT;
1457 rq_opc = MGS_DISCONNECT;
1461 CERROR("%s: don't know how to disconnect from %s "
1462 "(connect_op %d): rc = %d\n",
1463 imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
1464 imp->imp_connect_op, rc);
1468 if (ptlrpc_import_in_recovery(imp)) {
1469 struct l_wait_info lwi;
1470 cfs_duration_t timeout;
1473 if (imp->imp_server_timeout)
1474 timeout = cfs_time_seconds(obd_timeout / 2);
1476 timeout = cfs_time_seconds(obd_timeout);
1478 int idx = import_at_get_index(imp,
1479 imp->imp_client->cli_request_portal);
1480 timeout = cfs_time_seconds(
1481 at_get(&imp->imp_at.iat_service_estimate[idx]));
1484 lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
1485 back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL);
1486 rc = l_wait_event(imp->imp_recovery_waitq,
1487 !ptlrpc_import_in_recovery(imp), &lwi);
1491 spin_lock(&imp->imp_lock);
1492 if (imp->imp_state != LUSTRE_IMP_FULL)
1494 spin_unlock(&imp->imp_lock);
1496 req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
1497 LUSTRE_OBD_VERSION, rq_opc);
1499 /* We are disconnecting, do not retry a failed DISCONNECT rpc if
1500 * it fails. We can get through the above with a down server
1501 * if the client doesn't know the server is gone yet. */
1502 req->rq_no_resend = 1;
1504 /* We want client umounts to happen quickly, no matter the
1506 req->rq_timeout = min_t(int, req->rq_timeout,
1507 INITIAL_CONNECT_TIMEOUT);
1509 IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
1510 req->rq_send_state = LUSTRE_IMP_CONNECTING;
1511 ptlrpc_request_set_replen(req);
1512 rc = ptlrpc_queue_wait(req);
1513 ptlrpc_req_finished(req);
1517 spin_lock(&imp->imp_lock);
1520 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
1522 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1523 memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
1524 spin_unlock(&imp->imp_lock);
1526 if (rc == -ETIMEDOUT || rc == -ENOTCONN || rc == -ESHUTDOWN)
1530 EXPORT_SYMBOL(ptlrpc_disconnect_import);
1532 void ptlrpc_cleanup_imp(struct obd_import *imp)
1536 spin_lock(&imp->imp_lock);
1537 IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
1538 imp->imp_generation++;
1539 spin_unlock(&imp->imp_lock);
1540 ptlrpc_abort_inflight(imp);
1544 EXPORT_SYMBOL(ptlrpc_cleanup_imp);
1546 /* Adaptive Timeout utils */
1547 extern unsigned int at_min, at_max, at_history;
1549 /* Bin into timeslices using AT_BINS bins.
1550 This gives us a max of the last binlimit*AT_BINS secs without the storage,
1551 but still smoothing out a return to normalcy from a slow response.
1552 (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
1553 int at_measured(struct adaptive_timeout *at, unsigned int val)
1555 unsigned int old = at->at_current;
1556 time_t now = cfs_time_current_sec();
1557 time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
1560 CDEBUG(D_OTHER, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
1561 val, at, now - at->at_binstart, at->at_current,
1562 at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
1565 /* 0's don't count, because we never want our timeout to
1566 drop to 0, and because 0 could mean an error */
1569 spin_lock(&at->at_lock);
1571 if (unlikely(at->at_binstart == 0)) {
1572 /* Special case to remove default from history */
1573 at->at_current = val;
1574 at->at_worst_ever = val;
1575 at->at_worst_time = now;
1576 at->at_hist[0] = val;
1577 at->at_binstart = now;
1578 } else if (now - at->at_binstart < binlimit ) {
1580 at->at_hist[0] = max(val, at->at_hist[0]);
1581 at->at_current = max(val, at->at_current);
1584 unsigned int maxv = val;
1585 /* move bins over */
1586 shift = (now - at->at_binstart) / binlimit;
1588 for(i = AT_BINS - 1; i >= 0; i--) {
1590 at->at_hist[i] = at->at_hist[i - shift];
1591 maxv = max(maxv, at->at_hist[i]);
1596 at->at_hist[0] = val;
1597 at->at_current = maxv;
1598 at->at_binstart += shift * binlimit;
1601 if (at->at_current > at->at_worst_ever) {
1602 at->at_worst_ever = at->at_current;
1603 at->at_worst_time = now;
1606 if (at->at_flags & AT_FLG_NOHIST)
1607 /* Only keep last reported val; keeping the rest of the history
1609 at->at_current = val;
1612 at->at_current = min(at->at_current, at_max);
1613 at->at_current = max(at->at_current, at_min);
1615 if (at->at_current != old)
1616 CDEBUG(D_OTHER, "AT %p change: old=%u new=%u delta=%d "
1617 "(val=%u) hist %u %u %u %u\n", at,
1618 old, at->at_current, at->at_current - old, val,
1619 at->at_hist[0], at->at_hist[1], at->at_hist[2],
1622 /* if we changed, report the old value */
1623 old = (at->at_current != old) ? old : 0;
1625 spin_unlock(&at->at_lock);
1629 /* Find the imp_at index for a given portal; assign if space available */
1630 int import_at_get_index(struct obd_import *imp, int portal)
1632 struct imp_at *at = &imp->imp_at;
1635 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1636 if (at->iat_portal[i] == portal)
1638 if (at->iat_portal[i] == 0)
1643 /* Not found in list, add it under a lock */
1644 spin_lock(&imp->imp_lock);
1646 /* Check unused under lock */
1647 for (; i < IMP_AT_MAX_PORTALS; i++) {
1648 if (at->iat_portal[i] == portal)
1650 if (at->iat_portal[i] == 0)
1655 /* Not enough portals? */
1656 LASSERT(i < IMP_AT_MAX_PORTALS);
1658 at->iat_portal[i] = portal;
1660 spin_unlock(&imp->imp_lock);