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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2010, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 * This file deals with various client/target related logic including recovery.
36 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
40 #define DEBUG_SUBSYSTEM S_LDLM
42 #include <linux/kthread.h>
43 #include <libcfs/libcfs.h>
45 #include <obd_class.h>
46 #include <lustre_dlm.h>
47 #include <lustre_net.h>
48 #include <lustre_sec.h>
49 #include "ldlm_internal.h"
51 /* @priority: If non-zero, move the selected connection to the list head.
52 * @create: If zero, only search in existing connections.
54 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
55 int priority, int create)
57 struct ptlrpc_connection *ptlrpc_conn;
58 struct obd_import_conn *imp_conn = NULL, *item;
62 if (!create && !priority) {
63 CDEBUG(D_HA, "Nothing to do\n");
67 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
69 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
74 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
76 GOTO(out_put, rc = -ENOMEM);
80 spin_lock(&imp->imp_lock);
81 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
82 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
84 list_del(&item->oic_item);
85 list_add(&item->oic_item,
87 item->oic_last_attempt = 0;
89 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
90 imp, imp->imp_obd->obd_name, uuid->uuid,
91 (priority ? ", moved to head" : ""));
92 spin_unlock(&imp->imp_lock);
93 GOTO(out_free, rc = 0);
96 /* No existing import connection found for \a uuid. */
98 imp_conn->oic_conn = ptlrpc_conn;
99 imp_conn->oic_uuid = *uuid;
100 imp_conn->oic_last_attempt = 0;
102 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
104 list_add_tail(&imp_conn->oic_item,
105 &imp->imp_conn_list);
106 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
107 imp, imp->imp_obd->obd_name, uuid->uuid,
108 (priority ? "head" : "tail"));
110 spin_unlock(&imp->imp_lock);
111 GOTO(out_free, rc = -ENOENT);
114 spin_unlock(&imp->imp_lock);
118 OBD_FREE(imp_conn, sizeof(*imp_conn));
120 ptlrpc_connection_put(ptlrpc_conn);
124 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
126 return import_set_conn(imp, uuid, 1, 0);
129 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
132 return import_set_conn(imp, uuid, priority, 1);
134 EXPORT_SYMBOL(client_import_add_conn);
136 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
138 struct obd_import_conn *imp_conn;
139 struct obd_export *dlmexp;
143 spin_lock(&imp->imp_lock);
144 if (list_empty(&imp->imp_conn_list)) {
145 LASSERT(!imp->imp_connection);
149 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
150 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
152 LASSERT(imp_conn->oic_conn);
154 if (imp_conn == imp->imp_conn_current) {
155 LASSERT(imp_conn->oic_conn == imp->imp_connection);
157 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
158 imp->imp_state != LUSTRE_IMP_DISCON) {
159 CERROR("can't remove current connection\n");
160 GOTO(out, rc = -EBUSY);
163 ptlrpc_connection_put(imp->imp_connection);
164 imp->imp_connection = NULL;
166 dlmexp = class_conn2export(&imp->imp_dlm_handle);
167 if (dlmexp && dlmexp->exp_connection) {
168 LASSERT(dlmexp->exp_connection ==
170 ptlrpc_connection_put(dlmexp->exp_connection);
171 dlmexp->exp_connection = NULL;
175 class_export_put(dlmexp);
178 list_del(&imp_conn->oic_item);
179 ptlrpc_connection_put(imp_conn->oic_conn);
180 OBD_FREE(imp_conn, sizeof(*imp_conn));
181 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
182 imp, imp->imp_obd->obd_name, uuid->uuid);
187 spin_unlock(&imp->imp_lock);
189 CERROR("connection %s not found\n", uuid->uuid);
192 EXPORT_SYMBOL(client_import_del_conn);
195 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
196 * to find a conn uuid of \a imp which can reach \a peer.
198 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
199 struct obd_uuid *uuid)
201 struct obd_import_conn *conn;
205 spin_lock(&imp->imp_lock);
206 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
207 /* Check if conn UUID does have this peer NID. */
208 if (class_check_uuid(&conn->oic_uuid, peer)) {
209 *uuid = conn->oic_uuid;
214 spin_unlock(&imp->imp_lock);
217 EXPORT_SYMBOL(client_import_find_conn);
219 void client_destroy_import(struct obd_import *imp)
221 /* Drop security policy instance after all RPCs have finished/aborted
222 * to let all busy contexts be released. */
223 class_import_get(imp);
224 class_destroy_import(imp);
225 sptlrpc_import_sec_put(imp);
226 class_import_put(imp);
228 EXPORT_SYMBOL(client_destroy_import);
231 * Check whether or not the OSC is on MDT.
234 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
236 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
239 static int osc_on_mdt(char *obdname)
243 ptr = strrchr(obdname, '-');
247 if (strncmp(ptr + 1, "MDT", 3) == 0)
253 /* Configure an RPC client OBD device.
258 * 3 - inactive-on-startup
260 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
262 struct client_obd *cli = &obddev->u.cli;
263 struct obd_import *imp;
264 struct obd_uuid server_uuid;
265 int rq_portal, rp_portal, connect_op;
266 char *name = obddev->obd_type->typ_name;
267 enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
268 char *cli_name = lustre_cfg_buf(lcfg, 0);
272 /* In a more perfect world, we would hang a ptlrpc_client off of
273 * obd_type and just use the values from there. */
274 if (!strcmp(name, LUSTRE_OSC_NAME)) {
275 rq_portal = OST_REQUEST_PORTAL;
276 rp_portal = OSC_REPLY_PORTAL;
277 connect_op = OST_CONNECT;
278 cli->cl_sp_me = LUSTRE_SP_CLI;
279 cli->cl_sp_to = LUSTRE_SP_OST;
280 ns_type = LDLM_NS_TYPE_OSC;
281 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
282 !strcmp(name, LUSTRE_LWP_NAME)) {
283 rq_portal = MDS_REQUEST_PORTAL;
284 rp_portal = MDC_REPLY_PORTAL;
285 connect_op = MDS_CONNECT;
286 if (is_lwp_on_ost(cli_name))
287 cli->cl_sp_me = LUSTRE_SP_OST;
288 else if (is_lwp_on_mdt(cli_name))
289 cli->cl_sp_me = LUSTRE_SP_MDT;
291 cli->cl_sp_me = LUSTRE_SP_CLI;
292 cli->cl_sp_to = LUSTRE_SP_MDT;
293 ns_type = LDLM_NS_TYPE_MDC;
294 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
295 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
296 /* OSP_on_MDT for other MDTs */
297 connect_op = MDS_CONNECT;
298 cli->cl_sp_to = LUSTRE_SP_MDT;
299 ns_type = LDLM_NS_TYPE_MDC;
300 rq_portal = OUT_PORTAL;
302 /* OSP on MDT for OST */
303 connect_op = OST_CONNECT;
304 cli->cl_sp_to = LUSTRE_SP_OST;
305 ns_type = LDLM_NS_TYPE_OSC;
306 rq_portal = OST_REQUEST_PORTAL;
308 rp_portal = OSC_REPLY_PORTAL;
309 cli->cl_sp_me = LUSTRE_SP_MDT;
310 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
311 rq_portal = MGS_REQUEST_PORTAL;
312 rp_portal = MGC_REPLY_PORTAL;
313 connect_op = MGS_CONNECT;
314 cli->cl_sp_me = LUSTRE_SP_MGC;
315 cli->cl_sp_to = LUSTRE_SP_MGS;
316 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
317 ns_type = LDLM_NS_TYPE_MGC;
319 CERROR("unknown client OBD type \"%s\", can't setup\n",
324 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
325 CERROR("requires a TARGET UUID\n");
329 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
330 CERROR("client UUID must be less than 38 characters\n");
334 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
335 CERROR("setup requires a SERVER UUID\n");
339 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
340 CERROR("target UUID must be less than 38 characters\n");
344 init_rwsem(&cli->cl_sem);
345 mutex_init(&cli->cl_mgc_mutex);
346 cli->cl_conn_count = 0;
347 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
348 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
349 sizeof(server_uuid)));
351 cli->cl_dirty_pages = 0;
352 cli->cl_avail_grant = 0;
353 /* FIXME: Should limit this for the sum of all cl_dirty_max_pages. */
354 /* cl_dirty_max_pages may be changed at connect time in
355 * ptlrpc_connect_interpret(). */
356 client_adjust_max_dirty(cli);
357 INIT_LIST_HEAD(&cli->cl_cache_waiters);
358 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
359 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
360 INIT_LIST_HEAD(&cli->cl_loi_write_list);
361 INIT_LIST_HEAD(&cli->cl_loi_read_list);
362 spin_lock_init(&cli->cl_loi_list_lock);
363 atomic_set(&cli->cl_pending_w_pages, 0);
364 atomic_set(&cli->cl_pending_r_pages, 0);
365 cli->cl_r_in_flight = 0;
366 cli->cl_w_in_flight = 0;
368 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
369 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
370 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
371 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
372 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
373 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
376 INIT_LIST_HEAD(&cli->cl_lru_osc);
377 atomic_set(&cli->cl_lru_shrinkers, 0);
378 atomic_long_set(&cli->cl_lru_busy, 0);
379 atomic_long_set(&cli->cl_lru_in_list, 0);
380 INIT_LIST_HEAD(&cli->cl_lru_list);
381 spin_lock_init(&cli->cl_lru_list_lock);
382 atomic_long_set(&cli->cl_unstable_count, 0);
383 INIT_LIST_HEAD(&cli->cl_shrink_list);
385 init_waitqueue_head(&cli->cl_destroy_waitq);
386 atomic_set(&cli->cl_destroy_in_flight, 0);
387 #ifdef ENABLE_CHECKSUM
388 /* Turn on checksumming by default. */
389 cli->cl_checksum = 1;
391 * The supported checksum types will be worked out at connect time
392 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
395 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
397 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
399 /* Set it to possible maximum size. It may be reduced by ocd_brw_size
400 * from OFD after connecting. */
401 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
403 /* set cl_chunkbits default value to PAGE_SHIFT,
404 * it will be updated at OSC connection time. */
405 cli->cl_chunkbits = PAGE_SHIFT;
407 if (!strcmp(name, LUSTRE_MDC_NAME)) {
408 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
409 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 128 /* MB */) {
410 cli->cl_max_rpcs_in_flight = 2;
411 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 256 /* MB */) {
412 cli->cl_max_rpcs_in_flight = 3;
413 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 512 /* MB */) {
414 cli->cl_max_rpcs_in_flight = 4;
416 if (osc_on_mdt(obddev->obd_name))
417 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_MAX;
419 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
422 spin_lock_init(&cli->cl_mod_rpcs_lock);
423 spin_lock_init(&cli->cl_mod_rpcs_hist.oh_lock);
424 cli->cl_max_mod_rpcs_in_flight = 0;
425 cli->cl_mod_rpcs_in_flight = 0;
426 cli->cl_close_rpcs_in_flight = 0;
427 init_waitqueue_head(&cli->cl_mod_rpcs_waitq);
428 cli->cl_mod_tag_bitmap = NULL;
430 if (connect_op == MDS_CONNECT) {
431 cli->cl_max_mod_rpcs_in_flight = cli->cl_max_rpcs_in_flight - 1;
432 OBD_ALLOC(cli->cl_mod_tag_bitmap,
433 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
434 if (cli->cl_mod_tag_bitmap == NULL)
435 GOTO(err, rc = -ENOMEM);
440 CERROR("ldlm_get_ref failed: %d\n", rc);
444 ptlrpc_init_client(rq_portal, rp_portal, name,
445 &obddev->obd_ldlm_client);
447 imp = class_new_import(obddev);
449 GOTO(err_ldlm, rc = -ENOENT);
450 imp->imp_client = &obddev->obd_ldlm_client;
451 imp->imp_connect_op = connect_op;
452 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
453 LUSTRE_CFG_BUFLEN(lcfg, 1));
454 class_import_put(imp);
456 rc = client_import_add_conn(imp, &server_uuid, 1);
458 CERROR("can't add initial connection\n");
459 GOTO(err_import, rc);
462 cli->cl_import = imp;
463 /* cli->cl_max_mds_easize updated by mdc_init_ea_size() */
464 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
466 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
467 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
468 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
469 name, obddev->obd_name,
470 cli->cl_target_uuid.uuid);
471 spin_lock(&imp->imp_lock);
472 imp->imp_deactive = 1;
473 spin_unlock(&imp->imp_lock);
477 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
478 LDLM_NAMESPACE_CLIENT,
479 LDLM_NAMESPACE_GREEDY,
481 if (obddev->obd_namespace == NULL) {
482 CERROR("Unable to create client namespace - %s\n",
484 GOTO(err_import, rc = -ENOMEM);
490 class_destroy_import(imp);
494 if (cli->cl_mod_tag_bitmap != NULL)
495 OBD_FREE(cli->cl_mod_tag_bitmap,
496 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
497 cli->cl_mod_tag_bitmap = NULL;
501 EXPORT_SYMBOL(client_obd_setup);
503 int client_obd_cleanup(struct obd_device *obddev)
505 struct client_obd *cli = &obddev->u.cli;
508 ldlm_namespace_free_post(obddev->obd_namespace);
509 obddev->obd_namespace = NULL;
511 obd_cleanup_client_import(obddev);
512 LASSERT(obddev->u.cli.cl_import == NULL);
516 if (cli->cl_mod_tag_bitmap != NULL)
517 OBD_FREE(cli->cl_mod_tag_bitmap,
518 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
519 cli->cl_mod_tag_bitmap = NULL;
523 EXPORT_SYMBOL(client_obd_cleanup);
525 /* ->o_connect() method for client side (OSC and MDC and MGC) */
526 int client_connect_import(const struct lu_env *env,
527 struct obd_export **exp,
528 struct obd_device *obd, struct obd_uuid *cluuid,
529 struct obd_connect_data *data, void *localdata)
531 struct client_obd *cli = &obd->u.cli;
532 struct obd_import *imp = cli->cl_import;
533 struct obd_connect_data *ocd;
534 struct lustre_handle conn = { 0 };
540 down_write(&cli->cl_sem);
541 if (cli->cl_conn_count > 0)
542 GOTO(out_sem, rc = -EALREADY);
544 rc = class_connect(&conn, obd, cluuid);
548 cli->cl_conn_count++;
549 *exp = class_conn2export(&conn);
551 LASSERT(obd->obd_namespace);
553 imp->imp_dlm_handle = conn;
554 rc = ptlrpc_init_import(imp);
558 ocd = &imp->imp_connect_data;
561 is_mdc = strncmp(imp->imp_obd->obd_type->typ_name,
562 LUSTRE_MDC_NAME, 3) == 0;
564 data->ocd_connect_flags |= OBD_CONNECT_MULTIMODRPCS;
565 imp->imp_connect_flags_orig = data->ocd_connect_flags;
566 imp->imp_connect_flags2_orig = data->ocd_connect_flags2;
569 rc = ptlrpc_connect_import(imp);
572 data->ocd_connect_flags &= ~OBD_CONNECT_MULTIMODRPCS;
573 LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
576 LASSERT(*exp != NULL && (*exp)->exp_connection);
579 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
580 ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
581 data->ocd_connect_flags, ocd->ocd_connect_flags);
582 data->ocd_connect_flags = ocd->ocd_connect_flags;
583 /* clear the flag as it was not set and is not known
586 data->ocd_connect_flags &= ~OBD_CONNECT_MULTIMODRPCS;
589 ptlrpc_pinger_add_import(imp);
595 cli->cl_conn_count--;
596 class_disconnect(*exp);
600 up_write(&cli->cl_sem);
604 EXPORT_SYMBOL(client_connect_import);
606 int client_disconnect_export(struct obd_export *exp)
608 struct obd_device *obd = class_exp2obd(exp);
609 struct client_obd *cli;
610 struct obd_import *imp;
615 CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
616 exp, exp ? exp->exp_handle.h_cookie : -1);
621 imp = cli->cl_import;
623 down_write(&cli->cl_sem);
624 CDEBUG(D_INFO, "disconnect %s - %zu\n", obd->obd_name,
627 if (cli->cl_conn_count == 0) {
628 CERROR("disconnecting disconnected device (%s)\n",
630 GOTO(out_disconnect, rc = -EINVAL);
633 cli->cl_conn_count--;
634 if (cli->cl_conn_count != 0)
635 GOTO(out_disconnect, rc = 0);
637 /* Mark import deactivated now, so we don't try to reconnect if any
638 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
639 * fully deactivate the import, or that would drop all requests. */
640 spin_lock(&imp->imp_lock);
641 imp->imp_deactive = 1;
642 spin_unlock(&imp->imp_lock);
644 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
645 * delete it regardless. (It's safe to delete an import that was
647 (void)ptlrpc_pinger_del_import(imp);
649 if (obd->obd_namespace != NULL) {
650 /* obd_force == local only */
651 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
652 obd->obd_force ? LCF_LOCAL : 0, NULL);
653 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
656 /* There's no need to hold sem while disconnecting an import,
657 * and it may actually cause deadlock in GSS. */
658 up_write(&cli->cl_sem);
659 rc = ptlrpc_disconnect_import(imp, 0);
660 down_write(&cli->cl_sem);
662 ptlrpc_invalidate_import(imp);
667 /* Use server style - class_disconnect should be always called for
669 err = class_disconnect(exp);
673 up_write(&cli->cl_sem);
677 EXPORT_SYMBOL(client_disconnect_export);
679 #ifdef HAVE_SERVER_SUPPORT
680 int server_disconnect_export(struct obd_export *exp)
685 /* Disconnect early so that clients can't keep using export. */
686 rc = class_disconnect(exp);
687 /* Close import to avoid sending any requests. */
688 if (exp->exp_imp_reverse)
689 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
691 ldlm_bl_thread_wakeup();
693 /* complete all outstanding replies */
694 spin_lock(&exp->exp_lock);
695 while (!list_empty(&exp->exp_outstanding_replies)) {
696 struct ptlrpc_reply_state *rs =
697 list_entry(exp->exp_outstanding_replies.next,
698 struct ptlrpc_reply_state, rs_exp_list);
699 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
701 spin_lock(&svcpt->scp_rep_lock);
703 list_del_init(&rs->rs_exp_list);
704 spin_lock(&rs->rs_lock);
705 ptlrpc_schedule_difficult_reply(rs);
706 spin_unlock(&rs->rs_lock);
708 spin_unlock(&svcpt->scp_rep_lock);
710 spin_unlock(&exp->exp_lock);
714 EXPORT_SYMBOL(server_disconnect_export);
716 /* --------------------------------------------------------------------------
717 * from old lib/target.c
718 * -------------------------------------------------------------------------- */
720 static int target_handle_reconnect(struct lustre_handle *conn,
721 struct obd_export *exp,
722 struct obd_uuid *cluuid)
724 struct obd_device *target;
725 struct lustre_handle *hdl;
732 hdl = &exp->exp_imp_reverse->imp_remote_handle;
733 if (!exp->exp_connection || !lustre_handle_is_used(hdl)) {
734 conn->cookie = exp->exp_handle.h_cookie;
735 CDEBUG(D_HA, "connect export for UUID '%s' at %p,"
736 " cookie %#llx\n", cluuid->uuid, exp, conn->cookie);
740 target = exp->exp_obd;
742 /* Might be a re-connect after a partition. */
743 if (memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
744 LCONSOLE_WARN("%s: already connected client %s (at %s) "
745 "with handle %#llx. Rejecting client "
746 "with the same UUID trying to reconnect "
747 "with handle %#llx\n", target->obd_name,
748 obd_uuid2str(&exp->exp_client_uuid),
749 obd_export_nid2str(exp),
750 hdl->cookie, conn->cookie);
751 memset(conn, 0, sizeof *conn);
752 /* target_handle_connect() treats EALREADY and
753 * -EALREADY differently. -EALREADY is an error
754 * (same UUID, different handle). */
758 if (!target->obd_recovering) {
759 LCONSOLE_WARN("%s: Client %s (at %s) reconnecting\n",
760 target->obd_name, obd_uuid2str(&exp->exp_client_uuid),
761 obd_export_nid2str(exp));
762 GOTO(out_already, rc);
765 now = cfs_time_current();
766 deadline = cfs_timer_deadline(&target->obd_recovery_timer);
767 if (cfs_time_before(now, deadline)) {
768 struct target_distribute_txn_data *tdtd =
769 class_exp2tgt(exp)->lut_tdtd;
774 timeout = cfs_duration_sec(cfs_time_sub(deadline, now));
775 if (tdtd && tdtd->tdtd_show_update_logs_retrievers)
776 buf = tdtd->tdtd_show_update_logs_retrievers(
777 tdtd->tdtd_show_retrievers_cbdata,
781 LCONSOLE_WARN("%s: Recovery already passed deadline "
782 "%d:%.02d. It is due to DNE recovery "
783 "failed/stuck on the %d MDT(s):%s. "
784 "Please wait until all MDTs recovered "
785 "or abort the recovery by force.\n",
786 target->obd_name, timeout / 60,
788 buf ? buf : "unknown (not enough RAM)");
790 LCONSOLE_WARN("%s: Recovery already passed deadline "
791 "%d:%.02d. If you do not want to wait "
792 "more, please abort the recovery by "
793 "force.\n", target->obd_name,
794 timeout / 60, timeout % 60);
799 timeout = cfs_duration_sec(cfs_time_sub(now, deadline));
800 LCONSOLE_WARN("%s: Recovery already passed deadline"
801 " %d:%.02d, It is most likely due to DNE"
802 " recovery is failed or stuck, please wait a"
803 " few more minutes or abort the recovery.\n",
804 target->obd_name, timeout / 60, timeout % 60);
808 conn->cookie = exp->exp_handle.h_cookie;
809 /* target_handle_connect() treats EALREADY and
810 * -EALREADY differently. EALREADY means we are
811 * doing a valid reconnect from the same client. */
815 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
818 struct obd_export *exp = cb_data;
820 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
821 obd->obd_name, exp->exp_client_uuid.uuid);
823 spin_lock(&exp->exp_lock);
824 exp->exp_need_sync = 0;
825 spin_unlock(&exp->exp_lock);
826 class_export_cb_put(exp);
830 check_and_start_recovery_timer(struct obd_device *obd,
831 struct ptlrpc_request *req, int new_client);
834 * update flags for import during reconnect process
836 static int rev_import_flags_update(struct obd_import *revimp,
837 struct ptlrpc_request *req)
840 struct obd_connect_data *data;
842 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
844 if (data->ocd_connect_flags & OBD_CONNECT_AT)
845 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
847 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
849 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
851 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
853 CERROR("%s: cannot get reverse import %s security: rc = %d\n",
854 revimp->imp_client->cli_name,
855 libcfs_id2str(req->rq_peer), rc);
863 * Allocate a new reverse import for an export.
865 * \retval -errno in case error hit
866 * \retval 0 if reverse import correctly init
868 int rev_import_init(struct obd_export *export)
870 struct obd_device *obd = export->exp_obd;
871 struct obd_import *revimp;
873 LASSERT(export->exp_imp_reverse == NULL);
875 revimp = class_new_import(obd);
879 revimp->imp_remote_handle.cookie = 0ULL;
880 revimp->imp_client = &obd->obd_ldlm_client;
881 revimp->imp_dlm_fake = 1;
883 /* it is safe to connect import in new state as no sends possible */
884 spin_lock(&export->exp_lock);
885 export->exp_imp_reverse = revimp;
886 spin_unlock(&export->exp_lock);
887 class_import_put(revimp);
891 EXPORT_SYMBOL(rev_import_init);
894 * Handle reconnect for an export.
896 * \param exp export to handle reconnect process
897 * \param req client reconnect request
899 * \retval -rc in case securitfy flavor can't be changed
900 * \retval 0 in case none problems
902 static int rev_import_reconnect(struct obd_export *exp,
903 struct ptlrpc_request *req)
905 struct obd_import *revimp = exp->exp_imp_reverse;
906 struct lustre_handle *lh;
909 /* avoid sending a request until import flags are changed */
910 ptlrpc_import_enter_resend(revimp);
912 if (revimp->imp_connection != NULL)
913 ptlrpc_connection_put(revimp->imp_connection);
916 * client from recovery don't have a handle so we need to take from
917 * request. it may produce situation when wrong client connected
918 * to recovery as we trust a client uuid
920 lh = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
921 revimp->imp_remote_handle = *lh;
923 /* unknown versions will be caught in
924 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
925 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
927 revimp->imp_connection = ptlrpc_connection_addref(exp->exp_connection);
929 rc = rev_import_flags_update(revimp, req);
931 /* it is safe to still be in RECOVERY phase as we are not able
932 * to setup correct security flavor so requests are not able to
933 * be delivered correctly */
937 /* resend all rpc's via new connection */
938 return ptlrpc_import_recovery_state_machine(revimp);
941 int target_handle_connect(struct ptlrpc_request *req)
943 struct obd_device *target = NULL;
944 struct obd_export *export = NULL;
945 /* connect handle - filled from target_handle_reconnect in
947 struct lustre_handle conn;
948 struct lustre_handle *tmp;
949 struct obd_uuid tgtuuid;
950 struct obd_uuid cluuid;
955 bool mds_conn = false, lw_client = false, initial_conn = false;
956 bool mds_mds_conn = false;
957 bool new_mds_mds_conn = false;
958 bool target_referenced = false;
959 struct obd_connect_data *data, *tmpdata;
961 lnet_nid_t *client_nid = NULL;
964 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
966 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
968 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
969 GOTO(out, rc = -EINVAL);
972 obd_str2uuid(&tgtuuid, str);
973 target = class_uuid2obd(&tgtuuid);
975 target = class_name2obd(str);
978 deuuidify(str, NULL, &target_start, &target_len);
979 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
980 "from %s (no target). If you are running "
981 "an HA pair check that the target is "
982 "mounted on the other server.\n", str,
983 libcfs_nid2str(req->rq_peer.nid));
984 GOTO(out, rc = -ENODEV);
987 spin_lock(&target->obd_dev_lock);
988 if (target->obd_stopping || !target->obd_set_up) {
989 spin_unlock(&target->obd_dev_lock);
991 deuuidify(str, NULL, &target_start, &target_len);
992 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
993 target_len, target_start,
994 libcfs_nid2str(req->rq_peer.nid),
995 (target->obd_stopping ?
996 "stopping" : "not set up"));
997 GOTO(out, rc = -ENODEV);
1000 if (target->obd_no_conn) {
1001 spin_unlock(&target->obd_dev_lock);
1003 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
1004 "from %s\n", target->obd_name,
1005 libcfs_nid2str(req->rq_peer.nid));
1006 GOTO(out, rc = -EAGAIN);
1009 /* Make sure the target isn't cleaned up while we're here. Yes,
1010 * there's still a race between the above check and our incref here.
1011 * Really, class_uuid2obd should take the ref. */
1012 class_incref(target, __func__, current);
1013 target_referenced = true;
1015 target->obd_conn_inprogress++;
1016 spin_unlock(&target->obd_dev_lock);
1018 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
1020 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
1021 GOTO(out, rc = -EINVAL);
1024 obd_str2uuid(&cluuid, str);
1026 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1028 GOTO(out, rc = -EPROTO);
1032 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1034 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
1036 GOTO(out, rc = -EPROTO);
1038 rc = req_capsule_server_pack(&req->rq_pill);
1042 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
1043 /* Don't allow clients to connect that are using old 1.8 format
1044 * protocol conventions (LUSTRE_MSG_MAGIC_v1, !MSGHDR_CKSUM_INCOMPAT18,
1045 * ldlm_flock_policy_wire format, MDT_ATTR_xTIME_SET, etc). The
1046 * FULL20 flag should be set on all connections since 2.0, but no
1047 * longer affects behaviour.
1049 * Later this check will be disabled and the flag can be retired
1050 * completely once interop with 3.0 is no longer needed.
1052 if (!(data->ocd_connect_flags & OBD_CONNECT_FULL20))
1053 GOTO(out, rc = -EPROTO);
1056 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1057 if (data->ocd_version < LUSTRE_VERSION_CODE -
1058 LUSTRE_VERSION_ALLOWED_OFFSET ||
1059 data->ocd_version > LUSTRE_VERSION_CODE +
1060 LUSTRE_VERSION_ALLOWED_OFFSET) {
1061 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
1062 "libclient connection attempt",
1063 data->ocd_version < LUSTRE_VERSION_CODE ?
1065 OBD_OCD_VERSION_MAJOR(data->ocd_version),
1066 OBD_OCD_VERSION_MINOR(data->ocd_version),
1067 OBD_OCD_VERSION_PATCH(data->ocd_version),
1068 OBD_OCD_VERSION_FIX(data->ocd_version));
1069 data = req_capsule_server_sized_get(&req->rq_pill,
1071 offsetof(typeof(*data), ocd_version) +
1072 sizeof(data->ocd_version));
1074 data->ocd_connect_flags = OBD_CONNECT_VERSION;
1075 data->ocd_version = LUSTRE_VERSION_CODE;
1077 GOTO(out, rc = -EPROTO);
1081 /* Note: lw_client is needed in MDS-MDS failover during update log
1082 * processing, so we needs to allow lw_client to be connected at
1083 * anytime, instead of only the initial connection */
1084 lw_client = (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0;
1086 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) {
1087 initial_conn = true;
1088 mds_conn = (data->ocd_connect_flags & OBD_CONNECT_MDS) != 0;
1089 mds_mds_conn = (data->ocd_connect_flags &
1090 OBD_CONNECT_MDS_MDS) != 0;
1092 /* OBD_CONNECT_MNE_SWAB is defined as OBD_CONNECT_MDS_MDS
1093 * for Imperative Recovery connection from MGC to MGS.
1095 * Via check OBD_CONNECT_FID, we can distinguish whether
1096 * the OBD_CONNECT_MDS_MDS/OBD_CONNECT_MNE_SWAB is from
1099 (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1100 (data->ocd_connect_flags & OBD_CONNECT_FID) &&
1101 (data->ocd_connect_flags & OBD_CONNECT_VERSION)) {
1102 __u32 major = OBD_OCD_VERSION_MAJOR(data->ocd_version);
1103 __u32 minor = OBD_OCD_VERSION_MINOR(data->ocd_version);
1104 __u32 patch = OBD_OCD_VERSION_PATCH(data->ocd_version);
1106 /* We do not support the MDT-MDT interoperations with
1107 * different version MDT because of protocol changes. */
1108 if (unlikely(major != LUSTRE_MAJOR ||
1109 minor != LUSTRE_MINOR ||
1110 abs(patch - LUSTRE_PATCH) > 3)) {
1111 LCONSOLE_WARN("%s (%u.%u.%u.%u) refused the "
1112 "connection from different version MDT "
1113 "(%d.%d.%d.%d) %s %s\n",
1114 target->obd_name, LUSTRE_MAJOR,
1115 LUSTRE_MINOR, LUSTRE_PATCH, LUSTRE_FIX,
1116 major, minor, patch,
1117 OBD_OCD_VERSION_FIX(data->ocd_version),
1118 libcfs_nid2str(req->rq_peer.nid), str);
1120 GOTO(out, rc = -EPROTO);
1125 /* lctl gets a backstage, all-access pass. */
1126 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
1127 goto dont_check_exports;
1129 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
1133 /* We've found an export in the hash. */
1135 spin_lock(&export->exp_lock);
1137 if (export->exp_connecting) { /* bug 9635, et. al. */
1138 spin_unlock(&export->exp_lock);
1139 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
1140 export->exp_obd->obd_name, export,
1141 libcfs_nid2str(req->rq_peer.nid));
1142 class_export_put(export);
1145 } else if ((mds_conn || (lw_client && initial_conn) ||
1146 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1147 export->exp_connection != NULL) {
1148 spin_unlock(&export->exp_lock);
1149 if (req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1150 /* MDS or LWP reconnected after failover. */
1151 LCONSOLE_WARN("%s: Received %s connection from "
1152 "%s, removing former export from %s\n",
1153 target->obd_name, mds_conn ? "MDS" : "LWP",
1154 libcfs_nid2str(req->rq_peer.nid),
1155 libcfs_nid2str(export->exp_connection->c_peer.nid));
1157 /* New MDS connection from the same NID. */
1158 LCONSOLE_WARN("%s: Received new %s connection from "
1159 "%s, removing former export from same NID\n",
1160 target->obd_name, mds_conn ? "MDS" : "LWP",
1161 libcfs_nid2str(req->rq_peer.nid));
1164 if (req->rq_peer.nid == export->exp_connection->c_peer.nid &&
1165 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) {
1166 /* Because exports between MDTs will always be
1167 * kept, let's do not fail such export if they
1168 * come from the same NID, otherwise it might
1169 * cause eviction between MDTs, which might
1170 * cause namespace inconsistency */
1171 spin_lock(&export->exp_lock);
1172 export->exp_connecting = 1;
1173 spin_unlock(&export->exp_lock);
1174 conn.cookie = export->exp_handle.h_cookie;
1177 class_fail_export(export);
1178 class_export_put(export);
1182 } else if (export->exp_connection != NULL && initial_conn &&
1183 req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1184 spin_unlock(&export->exp_lock);
1185 /* In MDS failover we have static UUID but NID can change. */
1186 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
1187 "existing nid %s is already connected\n",
1188 target->obd_name, cluuid.uuid,
1189 libcfs_nid2str(req->rq_peer.nid),
1191 export->exp_connection->c_peer.nid));
1193 class_export_put(export);
1196 export->exp_connecting = 1;
1197 spin_unlock(&export->exp_lock);
1198 LASSERT(export->exp_obd == target);
1200 rc = target_handle_reconnect(&conn, export, &cluuid);
1203 /* If we found an export, we already unlocked. */
1206 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
1207 } else if (req->rq_export == NULL &&
1208 atomic_read(&export->exp_rpc_count) > 0) {
1209 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
1210 "still busy with %d references\n",
1211 target->obd_name, cluuid.uuid,
1212 libcfs_nid2str(req->rq_peer.nid),
1213 atomic_read(&export->exp_refcount));
1214 GOTO(out, rc = -EBUSY);
1215 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
1216 if (!strstr(cluuid.uuid, "mdt"))
1217 LCONSOLE_WARN("%s: Rejecting reconnect from the "
1218 "known client %s (at %s) because it "
1219 "is indicating it is a new client",
1220 target->obd_name, cluuid.uuid,
1221 libcfs_nid2str(req->rq_peer.nid));
1222 GOTO(out, rc = -EALREADY);
1224 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1231 CDEBUG(D_HA, "%s: connection from %s@%s %st%llu exp %p cur %ld last %ld\n",
1232 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1233 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1234 export, (long)cfs_time_current_sec(),
1235 export ? (long)export->exp_last_request_time : 0);
1237 /* If this is the first time a client connects, reset the recovery
1238 * timer. Discard lightweight connections which might be local. */
1239 if (!lw_client && rc == 0 && target->obd_recovering)
1240 check_and_start_recovery_timer(target, req, export == NULL);
1242 /* We want to handle EALREADY but *not* -EALREADY from
1243 * target_handle_reconnect(), return reconnection state in a flag. */
1244 if (rc == EALREADY) {
1245 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1251 /* Tell the client if we support replayable requests. */
1252 if (target->obd_replayable)
1253 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1254 client_nid = &req->rq_peer.nid;
1256 if (export == NULL) {
1257 /* allow lightweight connections during recovery */
1258 /* allow "new" MDT to be connected during recovery, since we
1259 * need retrieve recovery update records from it */
1260 if (target->obd_recovering && !lw_client && !mds_mds_conn) {
1262 int c; /* connected */
1263 int i; /* in progress */
1265 int s; /* stale/evicted */
1267 c = atomic_read(&target->obd_connected_clients);
1268 i = atomic_read(&target->obd_lock_replay_clients);
1269 k = target->obd_max_recoverable_clients;
1270 s = target->obd_stale_clients;
1271 t = cfs_timer_deadline(&target->obd_recovery_timer);
1272 t = cfs_time_sub(t, cfs_time_current());
1273 t = cfs_duration_sec(t);
1274 LCONSOLE_WARN("%s: Denying connection for new client %s"
1275 "(at %s), waiting for %d known clients "
1276 "(%d recovered, %d in progress, and %d "
1277 "evicted) to recover in %d:%.02d\n",
1278 target->obd_name, cluuid.uuid,
1279 libcfs_nid2str(req->rq_peer.nid), k,
1280 c - i, i, s, (int)t / 60,
1285 rc = obd_connect(req->rq_svc_thread->t_env,
1286 &export, target, &cluuid, data,
1288 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1289 lustre_msg_add_op_flags(req->rq_repmsg,
1290 MSG_CONNECT_RECOVERING);
1292 conn.cookie = export->exp_handle.h_cookie;
1293 rc = rev_import_init(export);
1297 new_mds_mds_conn = true;
1300 rc = obd_reconnect(req->rq_svc_thread->t_env,
1301 export, target, &cluuid, data, client_nid);
1306 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1307 data->ocd_instance = target->u.obt.obt_instance;
1309 /* Return only the parts of obd_connect_data that we understand, so the
1310 * client knows that we don't understand the rest. */
1312 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1314 tmpdata = req_capsule_server_get(&req->rq_pill,
1316 /* Don't use struct assignment here, because the client reply
1317 * buffer may be smaller/larger than the local struct
1318 * obd_connect_data. */
1319 memcpy(tmpdata, data, min(tmpsize, size));
1322 /* If the client and the server are the same node, we will already
1323 * have an export that really points to the client's DLM export,
1324 * because we have a shared handles table.
1326 * XXX this will go away when shaver stops sending the "connect" handle
1327 * in the real "remote handle" field of the request --phik 24 Apr 2003
1329 ptlrpc_request_change_export(req, export);
1331 spin_lock(&export->exp_lock);
1332 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1333 spin_unlock(&export->exp_lock);
1334 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1335 "or equal conn_cnt: %d >= %d\n",
1336 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1337 export->exp_conn_cnt,
1338 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1340 GOTO(out, rc = -EALREADY);
1342 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1343 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1345 /* Don't evict liblustre clients for not pinging. */
1346 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1347 export->exp_libclient = 1;
1348 spin_unlock(&export->exp_lock);
1350 spin_lock(&target->obd_dev_lock);
1351 list_del_init(&export->exp_obd_chain_timed);
1352 spin_unlock(&target->obd_dev_lock);
1354 spin_unlock(&export->exp_lock);
1357 if (export->exp_connection != NULL) {
1358 /* Check to see if connection came from another NID. */
1359 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1360 !hlist_unhashed(&export->exp_nid_hash))
1361 cfs_hash_del(export->exp_obd->obd_nid_hash,
1362 &export->exp_connection->c_peer.nid,
1363 &export->exp_nid_hash);
1365 ptlrpc_connection_put(export->exp_connection);
1368 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1371 if (hlist_unhashed(&export->exp_nid_hash))
1372 cfs_hash_add(export->exp_obd->obd_nid_hash,
1373 &export->exp_connection->c_peer.nid,
1374 &export->exp_nid_hash);
1376 lustre_msg_set_handle(req->rq_repmsg, &conn);
1378 rc = rev_import_reconnect(export, req);
1382 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1384 __u64 transno = data->ocd_transno;
1386 spin_lock(&export->exp_lock);
1387 /* possible race with class_disconnect_stale_exports,
1388 * export may be already in the eviction process */
1389 if (export->exp_failed) {
1390 spin_unlock(&export->exp_lock);
1391 GOTO(out, rc = -ENODEV);
1393 export->exp_in_recovery = 1;
1394 export->exp_req_replay_needed = 1;
1395 export->exp_lock_replay_needed = 1;
1396 spin_unlock(&export->exp_lock);
1398 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1399 MSG_CONNECT_TRANSNO);
1400 if (has_transno && transno == 0)
1401 CWARN("Connect with zero transno!\n");
1403 if (has_transno && transno > 0 &&
1404 transno < target->obd_next_recovery_transno &&
1405 transno > target->obd_last_committed) {
1406 /* Another way is to use cmpxchg() to be lock-free. */
1407 spin_lock(&target->obd_recovery_task_lock);
1408 if (transno < target->obd_next_recovery_transno)
1409 target->obd_next_recovery_transno = transno;
1410 spin_unlock(&target->obd_recovery_task_lock);
1413 atomic_inc(&target->obd_req_replay_clients);
1414 atomic_inc(&target->obd_lock_replay_clients);
1415 /* Note: MDS-MDS connection is allowed to be connected during
1416 * recovery, no matter if the exports needs to be recoveried.
1417 * Because we need retrieve updates logs from all other MDTs.
1418 * So if the MDS-MDS export is new, obd_max_recoverable_clients
1419 * also needs to be increased to match other recovery checking
1421 if (new_mds_mds_conn)
1422 target->obd_max_recoverable_clients++;
1423 if (atomic_inc_return(&target->obd_connected_clients) ==
1424 target->obd_max_recoverable_clients)
1425 wake_up(&target->obd_next_transno_waitq);
1428 /* Tell the client we're in recovery, when client is involved in it. */
1429 if (target->obd_recovering && !lw_client)
1430 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1434 spin_lock(&export->exp_lock);
1435 export->exp_connecting = 0;
1436 spin_unlock(&export->exp_lock);
1438 class_export_put(export);
1440 if (target_referenced == true && target != NULL) {
1441 spin_lock(&target->obd_dev_lock);
1442 target->obd_conn_inprogress--;
1443 spin_unlock(&target->obd_dev_lock);
1445 class_decref(target, __func__, current);
1447 req->rq_status = rc;
1451 int target_handle_disconnect(struct ptlrpc_request *req)
1456 rc = req_capsule_server_pack(&req->rq_pill);
1460 /* Keep the rq_export around so we can send the reply. */
1461 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1466 void target_destroy_export(struct obd_export *exp)
1468 struct obd_import *imp = NULL;
1469 /* exports created from last_rcvd data, and "fake"
1470 exports created by lctl don't have an import */
1471 spin_lock(&exp->exp_lock);
1472 if (exp->exp_imp_reverse != NULL) {
1473 imp = exp->exp_imp_reverse;
1474 exp->exp_imp_reverse = NULL;
1476 spin_unlock(&exp->exp_lock);
1478 client_destroy_import(imp);
1480 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1481 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1482 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1483 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1485 EXPORT_SYMBOL(target_destroy_export);
1488 * Recovery functions
1490 static void target_request_copy_get(struct ptlrpc_request *req)
1492 class_export_rpc_inc(req->rq_export);
1493 LASSERT(list_empty(&req->rq_list));
1494 INIT_LIST_HEAD(&req->rq_replay_list);
1496 /* Increase refcount to keep request in queue. */
1497 atomic_inc(&req->rq_refcount);
1498 /* Let export know it has replays to be handled. */
1499 atomic_inc(&req->rq_export->exp_replay_count);
1502 static void target_request_copy_put(struct ptlrpc_request *req)
1504 LASSERT(list_empty(&req->rq_replay_list));
1505 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1507 atomic_dec(&req->rq_export->exp_replay_count);
1508 class_export_rpc_dec(req->rq_export);
1509 ptlrpc_server_drop_request(req);
1512 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1514 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1515 struct obd_export *exp = req->rq_export;
1516 struct ptlrpc_request *reqiter;
1517 struct ptlrpc_request *dup_req = NULL;
1522 spin_lock(&exp->exp_lock);
1523 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1525 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1533 /* We expect it with RESENT and REPLAY flags. */
1534 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1535 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1536 CERROR("invalid flags %x of resent replay\n",
1537 lustre_msg_get_flags(req->rq_reqmsg));
1539 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1542 new_conn = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1544 lustre_msg_get_conn_cnt(dup_req->rq_reqmsg))
1545 lustre_msg_set_conn_cnt(dup_req->rq_reqmsg,
1549 list_add_tail(&req->rq_replay_list,
1550 &exp->exp_req_replay_queue);
1553 spin_unlock(&exp->exp_lock);
1557 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1559 LASSERT(!list_empty(&req->rq_replay_list));
1560 LASSERT(req->rq_export);
1562 spin_lock(&req->rq_export->exp_lock);
1563 list_del_init(&req->rq_replay_list);
1564 spin_unlock(&req->rq_export->exp_lock);
1567 static void target_finish_recovery(struct lu_target *lut)
1569 struct obd_device *obd = lut->lut_obd;
1572 /* Only log a recovery message when recovery has occurred. */
1573 if (obd->obd_recovery_start) {
1574 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1575 obd->obd_recovery_start);
1576 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1577 "%d recovered and %d %s evicted.\n", obd->obd_name,
1578 (int)elapsed_time / 60, (int)elapsed_time % 60,
1579 obd->obd_max_recoverable_clients,
1580 atomic_read(&obd->obd_connected_clients),
1581 obd->obd_stale_clients,
1582 obd->obd_stale_clients == 1 ? "was" : "were");
1585 ldlm_reprocess_all_ns(obd->obd_namespace);
1586 spin_lock(&obd->obd_recovery_task_lock);
1587 if (!list_empty(&obd->obd_req_replay_queue) ||
1588 !list_empty(&obd->obd_lock_replay_queue) ||
1589 !list_empty(&obd->obd_final_req_queue)) {
1590 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1592 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1593 list_empty(&obd->obd_lock_replay_queue) ? \
1595 list_empty(&obd->obd_final_req_queue) ? \
1597 spin_unlock(&obd->obd_recovery_task_lock);
1600 spin_unlock(&obd->obd_recovery_task_lock);
1602 obd->obd_recovery_end = cfs_time_current_sec();
1604 /* When recovery finished, cleanup orphans on MDS and OST. */
1605 if (OBT(obd) && OBP(obd, postrecov)) {
1606 int rc = OBP(obd, postrecov)(obd);
1608 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1614 static void abort_req_replay_queue(struct obd_device *obd)
1616 struct ptlrpc_request *req, *n;
1617 struct list_head abort_list;
1619 INIT_LIST_HEAD(&abort_list);
1620 spin_lock(&obd->obd_recovery_task_lock);
1621 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1622 spin_unlock(&obd->obd_recovery_task_lock);
1623 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1624 DEBUG_REQ(D_WARNING, req, "aborted:");
1625 req->rq_status = -ENOTCONN;
1626 if (ptlrpc_error(req)) {
1627 DEBUG_REQ(D_ERROR, req,
1628 "failed abort_req_reply; skipping");
1630 target_exp_dequeue_req_replay(req);
1631 target_request_copy_put(req);
1635 static void abort_lock_replay_queue(struct obd_device *obd)
1637 struct ptlrpc_request *req, *n;
1638 struct list_head abort_list;
1640 INIT_LIST_HEAD(&abort_list);
1641 spin_lock(&obd->obd_recovery_task_lock);
1642 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1643 spin_unlock(&obd->obd_recovery_task_lock);
1644 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1645 DEBUG_REQ(D_ERROR, req, "aborted:");
1646 req->rq_status = -ENOTCONN;
1647 if (ptlrpc_error(req)) {
1648 DEBUG_REQ(D_ERROR, req,
1649 "failed abort_lock_reply; skipping");
1651 target_request_copy_put(req);
1655 /* Called from a cleanup function if the device is being cleaned up
1656 forcefully. The exports should all have been disconnected already,
1657 the only thing left to do is
1658 - clear the recovery flags
1660 - free queued requests and replies, but don't send replies
1661 Because the obd_stopping flag is set, no new requests should be received.
1664 void target_cleanup_recovery(struct obd_device *obd)
1666 struct ptlrpc_request *req, *n;
1667 struct list_head clean_list;
1669 INIT_LIST_HEAD(&clean_list);
1670 spin_lock(&obd->obd_dev_lock);
1671 if (!obd->obd_recovering) {
1672 spin_unlock(&obd->obd_dev_lock);
1676 obd->obd_recovering = obd->obd_abort_recovery = 0;
1677 spin_unlock(&obd->obd_dev_lock);
1679 spin_lock(&obd->obd_recovery_task_lock);
1680 target_cancel_recovery_timer(obd);
1681 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1682 spin_unlock(&obd->obd_recovery_task_lock);
1684 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1685 LASSERT(req->rq_reply_state == NULL);
1686 target_exp_dequeue_req_replay(req);
1687 target_request_copy_put(req);
1690 spin_lock(&obd->obd_recovery_task_lock);
1691 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1692 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1693 spin_unlock(&obd->obd_recovery_task_lock);
1695 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1696 LASSERT(req->rq_reply_state == NULL);
1697 target_request_copy_put(req);
1702 EXPORT_SYMBOL(target_cleanup_recovery);
1704 /* obd_recovery_task_lock should be held */
1705 void target_cancel_recovery_timer(struct obd_device *obd)
1707 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1708 cfs_timer_disarm(&obd->obd_recovery_timer);
1711 static void target_start_recovery_timer(struct obd_device *obd)
1713 if (obd->obd_recovery_start != 0)
1716 spin_lock(&obd->obd_dev_lock);
1717 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1718 spin_unlock(&obd->obd_dev_lock);
1722 LASSERT(obd->obd_recovery_timeout != 0);
1724 if (obd->obd_recovery_start != 0) {
1725 spin_unlock(&obd->obd_dev_lock);
1729 cfs_timer_arm(&obd->obd_recovery_timer,
1730 cfs_time_shift(obd->obd_recovery_timeout));
1731 obd->obd_recovery_start = cfs_time_current_sec();
1732 spin_unlock(&obd->obd_dev_lock);
1734 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1735 "or until %d client%s reconnect%s\n",
1737 obd->obd_recovery_timeout / 60,
1738 obd->obd_recovery_timeout % 60,
1739 obd->obd_max_recoverable_clients,
1740 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1741 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1745 * extend recovery window.
1747 * if @extend is true, extend recovery window to have @drt remaining at least;
1748 * otherwise, make sure the recovery timeout value is not less than @drt.
1750 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1754 cfs_duration_t left;
1757 spin_lock(&obd->obd_dev_lock);
1758 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1759 spin_unlock(&obd->obd_dev_lock);
1762 LASSERT(obd->obd_recovery_start != 0);
1764 now = cfs_time_current_sec();
1765 to = obd->obd_recovery_timeout;
1766 end = obd->obd_recovery_start + to;
1767 left = cfs_time_sub(end, now);
1769 if (extend && (drt > left)) {
1771 } else if (!extend && (drt > to)) {
1775 if (to > obd->obd_recovery_time_hard)
1776 to = obd->obd_recovery_time_hard;
1777 if (obd->obd_recovery_timeout < to) {
1778 obd->obd_recovery_timeout = to;
1779 end = obd->obd_recovery_start + to;
1780 cfs_timer_arm(&obd->obd_recovery_timer,
1781 cfs_time_shift(end - now));
1783 spin_unlock(&obd->obd_dev_lock);
1785 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1786 obd->obd_name, (unsigned)cfs_time_sub(end, now));
1789 /* Reset the timer with each new client connection */
1791 * This timer is actually reconnect_timer, which is for making sure
1792 * the total recovery window is at least as big as my reconnect
1793 * attempt timing. So the initial recovery time_out will be set to
1794 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1795 * from client is bigger than this, then the recovery time_out will
1796 * be extended to make sure the client could be reconnected, in the
1797 * process, the timeout from the new client should be ignored.
1801 check_and_start_recovery_timer(struct obd_device *obd,
1802 struct ptlrpc_request *req,
1805 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1806 struct obd_device_target *obt = &obd->u.obt;
1808 if (!new_client && service_time)
1809 /* Teach server about old server's estimates, as first guess
1810 * at how long new requests will take. */
1811 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1814 target_start_recovery_timer(obd);
1816 /* Convert the service time to RPC timeout,
1817 * and reuse service_time to limit stack usage. */
1818 service_time = at_est2timeout(service_time);
1820 /* We expect other clients to timeout within service_time, then try
1821 * to reconnect, then try the failover server. The max delay between
1822 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1823 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1825 LASSERT(obt->obt_magic == OBT_MAGIC);
1826 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1827 if (service_time > obd->obd_recovery_timeout && !new_client)
1828 extend_recovery_timer(obd, service_time, false);
1831 /** Health checking routines */
1832 static inline int exp_connect_healthy(struct obd_export *exp)
1834 return (exp->exp_in_recovery);
1837 /** if export done req_replay or has replay in queue */
1838 static inline int exp_req_replay_healthy(struct obd_export *exp)
1840 return (!exp->exp_req_replay_needed ||
1841 atomic_read(&exp->exp_replay_count) > 0);
1845 static inline int exp_req_replay_healthy_or_from_mdt(struct obd_export *exp)
1847 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1848 exp_req_replay_healthy(exp);
1851 /** if export done lock_replay or has replay in queue */
1852 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1854 return (!exp->exp_lock_replay_needed ||
1855 atomic_read(&exp->exp_replay_count) > 0);
1858 static inline int exp_vbr_healthy(struct obd_export *exp)
1860 return (!exp->exp_vbr_failed);
1863 static inline int exp_finished(struct obd_export *exp)
1865 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1868 static inline int exp_finished_or_from_mdt(struct obd_export *exp)
1870 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1874 static int check_for_next_transno(struct lu_target *lut)
1876 struct ptlrpc_request *req = NULL;
1877 struct obd_device *obd = lut->lut_obd;
1878 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
1879 int wake_up = 0, connected, completed, queue_len;
1880 __u64 req_transno = 0;
1881 __u64 update_transno = 0;
1882 __u64 next_transno = 0;
1885 spin_lock(&obd->obd_recovery_task_lock);
1886 if (!list_empty(&obd->obd_req_replay_queue)) {
1887 req = list_entry(obd->obd_req_replay_queue.next,
1888 struct ptlrpc_request, rq_list);
1889 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1893 update_transno = distribute_txn_get_next_transno(tdtd);
1895 connected = atomic_read(&obd->obd_connected_clients);
1896 completed = connected - atomic_read(&obd->obd_req_replay_clients);
1897 queue_len = obd->obd_requests_queued_for_recovery;
1898 next_transno = obd->obd_next_recovery_transno;
1900 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1901 "req_transno: %llu, next_transno: %llu\n",
1902 obd->obd_max_recoverable_clients, connected, completed,
1903 queue_len, req_transno, next_transno);
1905 if (obd->obd_abort_recovery) {
1906 CDEBUG(D_HA, "waking for aborted recovery\n");
1908 } else if (obd->obd_recovery_expired) {
1909 CDEBUG(D_HA, "waking for expired recovery\n");
1911 } else if (tdtd != NULL && req != NULL &&
1912 is_req_replayed_by_update(req)) {
1913 LASSERTF(req_transno < next_transno, "req_transno %llu"
1914 "next_transno%llu\n", req_transno, next_transno);
1915 CDEBUG(D_HA, "waking for duplicate req (%llu)\n",
1918 } else if (req_transno == next_transno ||
1919 (update_transno != 0 && update_transno <= next_transno)) {
1920 CDEBUG(D_HA, "waking for next (%lld)\n", next_transno);
1922 } else if (queue_len > 0 &&
1923 queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1924 /** handle gaps occured due to lost reply or VBR */
1925 LASSERTF(req_transno >= next_transno,
1926 "req_transno: %llu, next_transno: %llu\n",
1927 req_transno, next_transno);
1929 "%s: waking for gap in transno, VBR is %s (skip: "
1930 "%lld, ql: %d, comp: %d, conn: %d, next: %lld"
1931 ", next_update %lld last_committed: %lld)\n",
1932 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1933 next_transno, queue_len, completed, connected,
1934 req_transno, update_transno, obd->obd_last_committed);
1935 obd->obd_next_recovery_transno = req_transno;
1937 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1938 CDEBUG(D_HA, "waking for completed recovery\n");
1940 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1941 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1942 " by fail_lock, waking up (%lld)\n", next_transno);
1943 obd->obd_next_recovery_transno = req_transno;
1946 spin_unlock(&obd->obd_recovery_task_lock);
1950 static int check_for_next_lock(struct lu_target *lut)
1952 struct obd_device *obd = lut->lut_obd;
1955 spin_lock(&obd->obd_recovery_task_lock);
1956 if (!list_empty(&obd->obd_lock_replay_queue)) {
1957 CDEBUG(D_HA, "waking for next lock\n");
1959 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1960 CDEBUG(D_HA, "waking for completed lock replay\n");
1962 } else if (obd->obd_abort_recovery) {
1963 CDEBUG(D_HA, "waking for aborted recovery\n");
1965 } else if (obd->obd_recovery_expired) {
1966 CDEBUG(D_HA, "waking for expired recovery\n");
1969 spin_unlock(&obd->obd_recovery_task_lock);
1975 * wait for recovery events,
1976 * check its status with help of check_routine
1977 * evict dead clients via health_check
1979 static int target_recovery_overseer(struct lu_target *lut,
1980 int (*check_routine)(struct lu_target *),
1981 int (*health_check)(struct obd_export *))
1983 struct obd_device *obd = lut->lut_obd;
1984 struct target_distribute_txn_data *tdtd;
1986 if ((obd->obd_recovery_start != 0) && (cfs_time_current_sec() >=
1987 (obd->obd_recovery_start + obd->obd_recovery_time_hard))) {
1988 __u64 next_update_transno = 0;
1990 /* Only abort the recovery if there are no update recovery
1991 * left in the queue */
1992 spin_lock(&obd->obd_recovery_task_lock);
1993 if (lut->lut_tdtd != NULL) {
1994 next_update_transno =
1995 distribute_txn_get_next_transno(lut->lut_tdtd);
1997 tdtd = lut->lut_tdtd;
1998 /* If next_update_transno == 0, it probably because
1999 * updatelog retrieve threads did not get any records
2000 * yet, let's wait those threads stopped */
2001 if (next_update_transno == 0) {
2002 struct l_wait_info lwi = { 0 };
2004 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2006 &tdtd->tdtd_recovery_threads_count) == 0,
2009 next_update_transno =
2010 distribute_txn_get_next_transno(
2015 if (next_update_transno != 0 && !obd->obd_abort_recovery) {
2016 obd->obd_next_recovery_transno = next_update_transno;
2017 spin_unlock(&obd->obd_recovery_task_lock);
2018 /* Disconnect unfinished exports from clients, and
2019 * keep connection from MDT to make sure the update
2020 * recovery will still keep trying until some one
2021 * manually abort the recovery */
2022 class_disconnect_stale_exports(obd,
2023 exp_finished_or_from_mdt);
2024 /* Abort all of replay and replay lock req from
2026 abort_req_replay_queue(obd);
2027 abort_lock_replay_queue(obd);
2028 CDEBUG(D_HA, "%s: there are still update replay (%#llx"
2029 ")in the queue.\n", obd->obd_name,
2030 next_update_transno);
2032 obd->obd_abort_recovery = 1;
2033 spin_unlock(&obd->obd_recovery_task_lock);
2034 CWARN("%s recovery is aborted by hard timeout\n",
2039 while (wait_event_timeout(obd->obd_next_transno_waitq,
2041 msecs_to_jiffies(60 * MSEC_PER_SEC)) == 0)
2042 /* wait indefinitely for event, but don't trigger watchdog */;
2044 if (obd->obd_abort_recovery) {
2045 CWARN("recovery is aborted, evict exports in recovery\n");
2046 if (lut->lut_tdtd != NULL) {
2047 struct l_wait_info lwi = { 0 };
2049 tdtd = lut->lut_tdtd;
2050 /* Let's wait all of the update log recovery thread
2052 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2053 atomic_read(&tdtd->tdtd_recovery_threads_count) == 0,
2055 /* Then abort the update recovery list */
2056 dtrq_list_destroy(lut->lut_tdtd);
2059 /** evict exports which didn't finish recovery yet */
2060 class_disconnect_stale_exports(obd, exp_finished);
2062 } else if (obd->obd_recovery_expired) {
2063 obd->obd_recovery_expired = 0;
2064 /** If some clients died being recovered, evict them */
2065 LCONSOLE_WARN("%s: recovery is timed out, "
2066 "evict stale exports\n", obd->obd_name);
2067 /** evict cexports with no replay in queue, they are stalled */
2068 class_disconnect_stale_exports(obd, health_check);
2070 /** continue with VBR */
2071 spin_lock(&obd->obd_dev_lock);
2072 obd->obd_version_recov = 1;
2073 spin_unlock(&obd->obd_dev_lock);
2075 * reset timer, recovery will proceed with versions now,
2076 * timeout is set just to handle reconnection delays
2078 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
2079 /** Wait for recovery events again, after evicting bad clients */
2085 static struct ptlrpc_request *target_next_replay_lock(struct lu_target *lut)
2087 struct obd_device *obd = lut->lut_obd;
2088 struct ptlrpc_request *req = NULL;
2090 CDEBUG(D_HA, "Waiting for lock\n");
2091 if (target_recovery_overseer(lut, check_for_next_lock,
2092 exp_lock_replay_healthy))
2093 abort_lock_replay_queue(obd);
2095 spin_lock(&obd->obd_recovery_task_lock);
2096 if (!list_empty(&obd->obd_lock_replay_queue)) {
2097 req = list_entry(obd->obd_lock_replay_queue.next,
2098 struct ptlrpc_request, rq_list);
2099 list_del_init(&req->rq_list);
2100 spin_unlock(&obd->obd_recovery_task_lock);
2102 spin_unlock(&obd->obd_recovery_task_lock);
2103 LASSERT(list_empty(&obd->obd_lock_replay_queue));
2104 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
2105 /** evict exports failed VBR */
2106 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2111 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
2113 struct ptlrpc_request *req = NULL;
2115 spin_lock(&obd->obd_recovery_task_lock);
2116 if (!list_empty(&obd->obd_final_req_queue)) {
2117 req = list_entry(obd->obd_final_req_queue.next,
2118 struct ptlrpc_request, rq_list);
2119 list_del_init(&req->rq_list);
2120 spin_unlock(&obd->obd_recovery_task_lock);
2121 if (req->rq_export->exp_in_recovery) {
2122 spin_lock(&req->rq_export->exp_lock);
2123 req->rq_export->exp_in_recovery = 0;
2124 spin_unlock(&req->rq_export->exp_lock);
2127 spin_unlock(&obd->obd_recovery_task_lock);
2132 static void handle_recovery_req(struct ptlrpc_thread *thread,
2133 struct ptlrpc_request *req,
2134 svc_handler_t handler)
2139 * export can be evicted during recovery, no need to handle replays for
2140 * it after that, discard such request silently
2142 if (req->rq_export->exp_disconnected)
2145 req->rq_session.lc_thread = thread;
2146 req->rq_svc_thread = thread;
2147 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
2149 /* thread context */
2150 lu_context_enter(&thread->t_env->le_ctx);
2152 lu_context_exit(&thread->t_env->le_ctx);
2154 /* don't reset timer for final stage */
2155 if (!exp_finished(req->rq_export)) {
2156 int to = obd_timeout;
2159 * Add request timeout to the recovery time so next request from
2160 * this client may come in recovery time
2163 struct ptlrpc_service_part *svcpt;
2165 svcpt = req->rq_rqbd->rqbd_svcpt;
2166 /* If the server sent early reply for this request,
2167 * the client will recalculate the timeout according to
2168 * current server estimate service time, so we will
2169 * use the maxium timeout here for waiting the client
2170 * sending the next req */
2171 to = max((int)at_est2timeout(
2172 at_get(&svcpt->scp_at_estimate)),
2173 (int)lustre_msg_get_timeout(req->rq_reqmsg));
2174 /* Add 2 net_latency, one for balance rq_deadline
2175 * (see ptl_send_rpc), one for resend the req to server,
2176 * Note: client will pack net_latency in replay req
2177 * (see ptlrpc_replay_req) */
2178 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
2180 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
2185 /** Checking routines for recovery */
2186 static int check_for_recovery_ready(struct lu_target *lut)
2188 struct obd_device *obd = lut->lut_obd;
2189 unsigned int clnts = atomic_read(&obd->obd_connected_clients);
2191 CDEBUG(D_HA, "connected %d stale %d max_recoverable_clients %d"
2192 " abort %d expired %d\n", clnts, obd->obd_stale_clients,
2193 obd->obd_max_recoverable_clients, obd->obd_abort_recovery,
2194 obd->obd_recovery_expired);
2196 if (!obd->obd_abort_recovery && !obd->obd_recovery_expired) {
2197 LASSERT(clnts <= obd->obd_max_recoverable_clients);
2198 if (clnts + obd->obd_stale_clients <
2199 obd->obd_max_recoverable_clients)
2203 if (lut->lut_tdtd != NULL) {
2204 if (!lut->lut_tdtd->tdtd_replay_ready &&
2205 !obd->obd_abort_recovery) {
2206 /* Let's extend recovery timer, in case the recovery
2207 * timer expired, and some clients got evicted */
2208 extend_recovery_timer(obd, obd->obd_recovery_timeout,
2210 CDEBUG(D_HA, "%s update recovery is not ready,"
2211 " extend recovery %d\n", obd->obd_name,
2212 obd->obd_recovery_timeout);
2221 REQUEST_RECOVERY = 1,
2222 UPDATE_RECOVERY = 2,
2225 static __u64 get_next_replay_req_transno(struct obd_device *obd)
2229 if (!list_empty(&obd->obd_req_replay_queue)) {
2230 struct ptlrpc_request *req;
2232 req = list_entry(obd->obd_req_replay_queue.next,
2233 struct ptlrpc_request, rq_list);
2234 transno = lustre_msg_get_transno(req->rq_reqmsg);
2240 static __u64 get_next_transno(struct lu_target *lut, int *type)
2242 struct obd_device *obd = lut->lut_obd;
2243 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2245 __u64 update_transno;
2248 transno = get_next_replay_req_transno(obd);
2250 *type = REQUEST_RECOVERY;
2255 update_transno = distribute_txn_get_next_transno(tdtd);
2256 if (transno == 0 || (transno >= update_transno &&
2257 update_transno != 0)) {
2258 transno = update_transno;
2260 *type = UPDATE_RECOVERY;
2267 * drop duplicate replay request
2269 * Because the operation has been replayed by update recovery, the request
2270 * with the same transno will be dropped and also notify the client to send
2271 * next replay request.
2273 * \param[in] env execution environment
2274 * \param[in] obd failover obd device
2275 * \param[in] req request to be dropped
2277 static void drop_duplicate_replay_req(struct lu_env *env,
2278 struct obd_device *obd,
2279 struct ptlrpc_request *req)
2281 DEBUG_REQ(D_HA, req, "remove t%lld from %s because of duplicate"
2282 " update records are found.\n",
2283 lustre_msg_get_transno(req->rq_reqmsg),
2284 libcfs_nid2str(req->rq_peer.nid));
2286 /* Right now, only for MDS reint operation update replay and
2287 * normal request replay can have the same transno */
2288 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT) {
2289 req_capsule_set(&req->rq_pill, &RQF_MDS_REINT);
2290 req->rq_status = req_capsule_server_pack(&req->rq_pill);
2291 if (likely(req->rq_export))
2292 target_committed_to_req(req);
2293 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
2294 target_send_reply(req, req->rq_status, 0);
2296 DEBUG_REQ(D_ERROR, req, "wrong opc" "from %s\n",
2297 libcfs_nid2str(req->rq_peer.nid));
2299 target_exp_dequeue_req_replay(req);
2300 target_request_copy_put(req);
2301 obd->obd_replayed_requests++;
2304 static void replay_request_or_update(struct lu_env *env,
2305 struct lu_target *lut,
2306 struct target_recovery_data *trd,
2307 struct ptlrpc_thread *thread)
2309 struct obd_device *obd = lut->lut_obd;
2310 struct ptlrpc_request *req = NULL;
2315 CDEBUG(D_HA, "Waiting for transno %lld\n",
2316 obd->obd_next_recovery_transno);
2318 /* Replay all of request and update by transno */
2320 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2322 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_DELAY2, cfs_fail_val);
2324 /** It is needed to extend recovery window above
2325 * recovery_time_soft. Extending is possible only in the
2326 * end of recovery window (see more details in
2327 * handle_recovery_req()).
2329 CFS_FAIL_TIMEOUT_MS(OBD_FAIL_TGT_REPLAY_DELAY, 300);
2331 if (target_recovery_overseer(lut, check_for_next_transno,
2332 exp_req_replay_healthy_or_from_mdt)) {
2333 abort_req_replay_queue(obd);
2334 abort_lock_replay_queue(obd);
2338 spin_lock(&obd->obd_recovery_task_lock);
2339 transno = get_next_transno(lut, &type);
2340 if (type == REQUEST_RECOVERY && transno != 0) {
2341 /* Drop replay request from client side, if the
2342 * replay has been executed by update with the
2344 req = list_entry(obd->obd_req_replay_queue.next,
2345 struct ptlrpc_request, rq_list);
2347 list_del_init(&req->rq_list);
2348 obd->obd_requests_queued_for_recovery--;
2349 spin_unlock(&obd->obd_recovery_task_lock);
2351 /* Let's check if the request has been redone by
2353 if (is_req_replayed_by_update(req)) {
2354 struct distribute_txn_replay_req *dtrq;
2356 dtrq = distribute_txn_lookup_finish_list(tdtd,
2358 LASSERT(dtrq != NULL);
2359 spin_lock(&tdtd->tdtd_replay_list_lock);
2360 list_del_init(&dtrq->dtrq_list);
2361 spin_unlock(&tdtd->tdtd_replay_list_lock);
2364 drop_duplicate_replay_req(env, obd, req);
2369 LASSERT(trd->trd_processing_task == current_pid());
2370 DEBUG_REQ(D_HA, req, "processing t%lld from %s",
2371 lustre_msg_get_transno(req->rq_reqmsg),
2372 libcfs_nid2str(req->rq_peer.nid));
2374 handle_recovery_req(thread, req,
2375 trd->trd_recovery_handler);
2377 * bz18031: increase next_recovery_transno before
2378 * target_request_copy_put() will drop exp_rpc reference
2380 spin_lock(&obd->obd_recovery_task_lock);
2381 obd->obd_next_recovery_transno++;
2382 spin_unlock(&obd->obd_recovery_task_lock);
2383 target_exp_dequeue_req_replay(req);
2384 target_request_copy_put(req);
2385 obd->obd_replayed_requests++;
2386 } else if (type == UPDATE_RECOVERY && transno != 0) {
2387 struct distribute_txn_replay_req *dtrq;
2390 spin_unlock(&obd->obd_recovery_task_lock);
2392 LASSERT(tdtd != NULL);
2393 dtrq = distribute_txn_get_next_req(tdtd);
2394 lu_context_enter(&thread->t_env->le_ctx);
2395 rc = tdtd->tdtd_replay_handler(env, tdtd, dtrq);
2396 lu_context_exit(&thread->t_env->le_ctx);
2397 extend_recovery_timer(obd, obd_timeout, true);
2399 if (rc == 0 && dtrq->dtrq_xid != 0) {
2400 CDEBUG(D_HA, "Move x%llu t%llu"
2401 " to finish list\n", dtrq->dtrq_xid,
2402 dtrq->dtrq_master_transno);
2404 /* Add it to the replay finish list */
2405 spin_lock(&tdtd->tdtd_replay_list_lock);
2406 list_add(&dtrq->dtrq_list,
2407 &tdtd->tdtd_replay_finish_list);
2408 spin_unlock(&tdtd->tdtd_replay_list_lock);
2410 spin_lock(&obd->obd_recovery_task_lock);
2411 if (transno == obd->obd_next_recovery_transno)
2412 obd->obd_next_recovery_transno++;
2414 obd->obd_next_recovery_transno)
2415 obd->obd_next_recovery_transno =
2417 spin_unlock(&obd->obd_recovery_task_lock);
2422 spin_unlock(&obd->obd_recovery_task_lock);
2424 LASSERT(list_empty(&obd->obd_req_replay_queue));
2425 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
2426 /** evict exports failed VBR */
2427 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2433 static int target_recovery_thread(void *arg)
2435 struct lu_target *lut = arg;
2436 struct obd_device *obd = lut->lut_obd;
2437 struct ptlrpc_request *req;
2438 struct target_recovery_data *trd = &obd->obd_recovery_data;
2439 unsigned long delta;
2441 struct ptlrpc_thread *thread = NULL;
2445 unshare_fs_struct();
2446 OBD_ALLOC_PTR(thread);
2452 OBD_FREE_PTR(thread);
2456 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
2458 OBD_FREE_PTR(thread);
2463 thread->t_env = env;
2464 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
2465 env->le_ctx.lc_thread = thread;
2466 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
2467 thread->t_watchdog = NULL;
2469 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2471 trd->trd_processing_task = current_pid();
2473 spin_lock(&obd->obd_dev_lock);
2474 obd->obd_recovering = 1;
2475 spin_unlock(&obd->obd_dev_lock);
2476 complete(&trd->trd_starting);
2478 /* first of all, we have to know the first transno to replay */
2479 if (target_recovery_overseer(lut, check_for_recovery_ready,
2480 exp_connect_healthy)) {
2481 abort_req_replay_queue(obd);
2482 abort_lock_replay_queue(obd);
2483 if (lut->lut_tdtd != NULL)
2484 dtrq_list_destroy(lut->lut_tdtd);
2487 /* next stage: replay requests or update */
2489 CDEBUG(D_INFO, "1: request replay stage - %d clients from t%llu\n",
2490 atomic_read(&obd->obd_req_replay_clients),
2491 obd->obd_next_recovery_transno);
2492 replay_request_or_update(env, lut, trd, thread);
2495 * The second stage: replay locks
2497 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2498 atomic_read(&obd->obd_lock_replay_clients));
2499 while ((req = target_next_replay_lock(lut))) {
2500 LASSERT(trd->trd_processing_task == current_pid());
2501 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2502 libcfs_nid2str(req->rq_peer.nid));
2503 handle_recovery_req(thread, req,
2504 trd->trd_recovery_handler);
2505 target_request_copy_put(req);
2506 obd->obd_replayed_locks++;
2510 * The third stage: reply on final pings, at this moment all clients
2511 * must have request in final queue
2513 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_RECONNECT, cfs_fail_val);
2514 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2515 /** Update server last boot epoch */
2516 tgt_boot_epoch_update(lut);
2517 /* We drop recoverying flag to forward all new requests
2518 * to regular mds_handle() since now */
2519 spin_lock(&obd->obd_dev_lock);
2520 obd->obd_recovering = obd->obd_abort_recovery = 0;
2521 spin_unlock(&obd->obd_dev_lock);
2522 spin_lock(&obd->obd_recovery_task_lock);
2523 target_cancel_recovery_timer(obd);
2524 spin_unlock(&obd->obd_recovery_task_lock);
2525 while ((req = target_next_final_ping(obd))) {
2526 LASSERT(trd->trd_processing_task == current_pid());
2527 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2528 libcfs_nid2str(req->rq_peer.nid));
2529 handle_recovery_req(thread, req,
2530 trd->trd_recovery_handler);
2531 /* Because the waiting client can not send ping to server,
2532 * so we need refresh the last_request_time, to avoid the
2533 * export is being evicted */
2534 ptlrpc_update_export_timer(req->rq_export, 0);
2535 target_request_copy_put(req);
2538 delta = jiffies_to_msecs(jiffies - delta) / MSEC_PER_SEC;
2539 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2540 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2541 if (delta > OBD_RECOVERY_TIME_SOFT) {
2542 CWARN("too long recovery - read logs\n");
2543 libcfs_debug_dumplog();
2546 target_finish_recovery(lut);
2548 lu_context_fini(&env->le_ctx);
2549 trd->trd_processing_task = 0;
2550 complete(&trd->trd_finishing);
2552 tgt_io_thread_done(thread);
2553 OBD_FREE_PTR(thread);
2558 static int target_start_recovery_thread(struct lu_target *lut,
2559 svc_handler_t handler)
2561 struct obd_device *obd = lut->lut_obd;
2563 struct target_recovery_data *trd = &obd->obd_recovery_data;
2566 memset(trd, 0, sizeof(*trd));
2567 init_completion(&trd->trd_starting);
2568 init_completion(&trd->trd_finishing);
2569 trd->trd_recovery_handler = handler;
2571 rc = server_name2index(obd->obd_name, &index, NULL);
2575 if (!IS_ERR(kthread_run(target_recovery_thread,
2576 lut, "tgt_recover_%d", index))) {
2577 wait_for_completion(&trd->trd_starting);
2578 LASSERT(obd->obd_recovering != 0);
2586 void target_stop_recovery_thread(struct obd_device *obd)
2588 if (obd->obd_recovery_data.trd_processing_task > 0) {
2589 struct target_recovery_data *trd = &obd->obd_recovery_data;
2590 /** recovery can be done but postrecovery is not yet */
2591 spin_lock(&obd->obd_dev_lock);
2592 if (obd->obd_recovering) {
2593 CERROR("%s: Aborting recovery\n", obd->obd_name);
2594 obd->obd_abort_recovery = 1;
2595 wake_up(&obd->obd_next_transno_waitq);
2597 spin_unlock(&obd->obd_dev_lock);
2598 wait_for_completion(&trd->trd_finishing);
2601 EXPORT_SYMBOL(target_stop_recovery_thread);
2603 void target_recovery_fini(struct obd_device *obd)
2605 class_disconnect_exports(obd);
2606 target_stop_recovery_thread(obd);
2607 target_cleanup_recovery(obd);
2609 EXPORT_SYMBOL(target_recovery_fini);
2611 static void target_recovery_expired(unsigned long castmeharder)
2613 struct obd_device *obd = (struct obd_device *)castmeharder;
2614 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2615 " after %lds (%d clients connected)\n",
2616 obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
2617 cfs_time_current_sec()- obd->obd_recovery_start,
2618 atomic_read(&obd->obd_connected_clients));
2620 obd->obd_recovery_expired = 1;
2621 wake_up(&obd->obd_next_transno_waitq);
2624 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2626 struct obd_device *obd = lut->lut_obd;
2628 if (obd->obd_max_recoverable_clients == 0) {
2629 /** Update server last boot epoch */
2630 tgt_boot_epoch_update(lut);
2634 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2635 "last_transno %llu\n", obd->obd_name,
2636 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2637 LASSERT(obd->obd_stopping == 0);
2638 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2639 obd->obd_recovery_start = 0;
2640 obd->obd_recovery_end = 0;
2642 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2643 target_start_recovery_thread(lut, handler);
2645 EXPORT_SYMBOL(target_recovery_init);
2647 static int target_process_req_flags(struct obd_device *obd,
2648 struct ptlrpc_request *req)
2650 struct obd_export *exp = req->rq_export;
2651 LASSERT(exp != NULL);
2652 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2653 /* client declares he's ready to replay locks */
2654 spin_lock(&exp->exp_lock);
2655 if (exp->exp_req_replay_needed) {
2656 exp->exp_req_replay_needed = 0;
2657 spin_unlock(&exp->exp_lock);
2659 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2660 atomic_dec(&obd->obd_req_replay_clients);
2662 spin_unlock(&exp->exp_lock);
2665 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2666 /* client declares he's ready to complete recovery
2667 * so, we put the request on th final queue */
2668 spin_lock(&exp->exp_lock);
2669 if (exp->exp_lock_replay_needed) {
2670 exp->exp_lock_replay_needed = 0;
2671 spin_unlock(&exp->exp_lock);
2673 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2674 atomic_dec(&obd->obd_lock_replay_clients);
2676 spin_unlock(&exp->exp_lock);
2682 int target_queue_recovery_request(struct ptlrpc_request *req,
2683 struct obd_device *obd)
2685 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2686 struct ptlrpc_request *reqiter;
2690 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2691 /* Processing the queue right now, don't re-add. */
2695 target_process_req_flags(obd, req);
2697 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2698 /* client declares he's ready to complete recovery
2699 * so, we put the request on th final queue */
2700 target_request_copy_get(req);
2701 DEBUG_REQ(D_HA, req, "queue final req");
2702 wake_up(&obd->obd_next_transno_waitq);
2703 spin_lock(&obd->obd_recovery_task_lock);
2704 if (obd->obd_recovering) {
2705 struct ptlrpc_request *tmp;
2706 struct ptlrpc_request *duplicate = NULL;
2708 if (likely(!req->rq_export->exp_replay_done)) {
2709 req->rq_export->exp_replay_done = 1;
2710 list_add_tail(&req->rq_list,
2711 &obd->obd_final_req_queue);
2712 spin_unlock(&obd->obd_recovery_task_lock);
2716 /* XXX O(n), but only happens if final ping is
2717 * timed out, probably reorganize the list as
2718 * a hash list later */
2719 list_for_each_entry_safe(reqiter, tmp,
2720 &obd->obd_final_req_queue,
2722 if (reqiter->rq_export == req->rq_export) {
2723 list_del_init(&reqiter->rq_list);
2724 duplicate = reqiter;
2729 list_add_tail(&req->rq_list,
2730 &obd->obd_final_req_queue);
2731 req->rq_export->exp_replay_done = 1;
2732 spin_unlock(&obd->obd_recovery_task_lock);
2734 if (duplicate != NULL) {
2735 DEBUG_REQ(D_HA, duplicate,
2736 "put prev final req\n");
2737 target_request_copy_put(duplicate);
2741 spin_unlock(&obd->obd_recovery_task_lock);
2742 target_request_copy_put(req);
2743 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2746 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2747 /* client declares he's ready to replay locks */
2748 target_request_copy_get(req);
2749 DEBUG_REQ(D_HA, req, "queue lock replay req");
2750 wake_up(&obd->obd_next_transno_waitq);
2751 spin_lock(&obd->obd_recovery_task_lock);
2752 LASSERT(obd->obd_recovering);
2753 /* usually due to recovery abort */
2754 if (!req->rq_export->exp_in_recovery) {
2755 spin_unlock(&obd->obd_recovery_task_lock);
2756 target_request_copy_put(req);
2759 LASSERT(req->rq_export->exp_lock_replay_needed);
2760 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2761 spin_unlock(&obd->obd_recovery_task_lock);
2765 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2766 * (i.e. buflens etc are in my own byte order), but type-dependent
2767 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2770 INIT_LIST_HEAD(&req->rq_list);
2771 DEBUG_REQ(D_HA, req, "not queueing");
2775 /* If we're processing the queue, we want don't want to queue this
2778 * Also, if this request has a transno less than the one we're waiting
2779 * for, we should process it now. It could (and currently always will)
2780 * be an open request for a descriptor that was opened some time ago.
2782 * Also, a resent, replayed request that has already been
2783 * handled will pass through here and be processed immediately.
2785 CDEBUG(D_HA, "Next recovery transno: %llu"
2786 ", current: %llu, replaying\n",
2787 obd->obd_next_recovery_transno, transno);
2789 /* If the request has been replayed by update replay, then sends this
2790 * request to the recovery thread (replay_request_or_update()), where
2791 * it will be handled */
2792 spin_lock(&obd->obd_recovery_task_lock);
2793 if (transno < obd->obd_next_recovery_transno &&
2794 !is_req_replayed_by_update(req)) {
2795 /* Processing the queue right now, don't re-add. */
2796 LASSERT(list_empty(&req->rq_list));
2797 spin_unlock(&obd->obd_recovery_task_lock);
2800 spin_unlock(&obd->obd_recovery_task_lock);
2802 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2805 target_request_copy_get(req);
2806 if (!req->rq_export->exp_in_recovery) {
2807 target_request_copy_put(req);
2810 LASSERT(req->rq_export->exp_req_replay_needed);
2812 if (target_exp_enqueue_req_replay(req)) {
2813 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2814 target_request_copy_put(req);
2819 spin_lock(&obd->obd_recovery_task_lock);
2820 LASSERT(obd->obd_recovering);
2821 list_for_each_entry(reqiter, &obd->obd_req_replay_queue, rq_list) {
2822 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2823 list_add_tail(&req->rq_list, &reqiter->rq_list);
2828 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2830 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2831 "has been claimed by another client");
2832 spin_unlock(&obd->obd_recovery_task_lock);
2833 target_exp_dequeue_req_replay(req);
2834 target_request_copy_put(req);
2840 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2842 obd->obd_requests_queued_for_recovery++;
2843 spin_unlock(&obd->obd_recovery_task_lock);
2844 wake_up(&obd->obd_next_transno_waitq);
2848 int target_handle_ping(struct ptlrpc_request *req)
2850 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2851 return req_capsule_server_pack(&req->rq_pill);
2854 void target_committed_to_req(struct ptlrpc_request *req)
2856 struct obd_export *exp = req->rq_export;
2858 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2859 lustre_msg_set_last_committed(req->rq_repmsg,
2860 exp->exp_last_committed);
2862 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2863 "%d)", exp->exp_obd->obd_no_transno,
2864 req->rq_repmsg == NULL);
2866 CDEBUG(D_INFO, "last_committed %llu, transno %llu, xid %llu\n",
2867 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2870 #endif /* HAVE_SERVER_SUPPORT */
2873 * Packs current SLV and Limit into \a req.
2875 int target_pack_pool_reply(struct ptlrpc_request *req)
2877 struct obd_device *obd;
2880 /* Check that we still have all structures alive as this may
2881 * be some late RPC at shutdown time. */
2882 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2883 !exp_connect_lru_resize(req->rq_export))) {
2884 lustre_msg_set_slv(req->rq_repmsg, 0);
2885 lustre_msg_set_limit(req->rq_repmsg, 0);
2889 /* OBD is alive here as export is alive, which we checked above. */
2890 obd = req->rq_export->exp_obd;
2892 read_lock(&obd->obd_pool_lock);
2893 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2894 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2895 read_unlock(&obd->obd_pool_lock);
2900 static int target_send_reply_msg(struct ptlrpc_request *req,
2901 int rc, int fail_id)
2903 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2904 DEBUG_REQ(D_ERROR, req, "dropping reply");
2907 /* We can have a null rq_reqmsg in the event of bad signature or
2908 * no context when unwrapping */
2909 if (req->rq_reqmsg &&
2910 unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
2911 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET_REP)))
2915 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2916 req->rq_status = rc;
2917 return ptlrpc_send_error(req, 1);
2919 DEBUG_REQ(D_NET, req, "sending reply");
2922 return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
2925 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2927 struct ptlrpc_service_part *svcpt;
2929 struct ptlrpc_reply_state *rs;
2930 struct obd_export *exp;
2933 if (req->rq_no_reply) {
2938 svcpt = req->rq_rqbd->rqbd_svcpt;
2939 rs = req->rq_reply_state;
2940 if (rs == NULL || !rs->rs_difficult) {
2942 target_send_reply_msg (req, rc, fail_id);
2947 /* must be an export if locks saved */
2948 LASSERT(req->rq_export != NULL);
2949 /* req/reply consistent */
2950 LASSERT(rs->rs_svcpt == svcpt);
2953 LASSERT(!rs->rs_scheduled);
2954 LASSERT(!rs->rs_scheduled_ever);
2955 LASSERT(!rs->rs_handled);
2956 LASSERT(!rs->rs_on_net);
2957 LASSERT(rs->rs_export == NULL);
2958 LASSERT(list_empty(&rs->rs_obd_list));
2959 LASSERT(list_empty(&rs->rs_exp_list));
2961 exp = class_export_get(req->rq_export);
2963 /* disable reply scheduling while I'm setting up */
2964 rs->rs_scheduled = 1;
2966 rs->rs_xid = req->rq_xid;
2967 rs->rs_transno = req->rq_transno;
2968 rs->rs_export = exp;
2969 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2971 spin_lock(&exp->exp_uncommitted_replies_lock);
2972 CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
2973 rs->rs_transno, exp->exp_last_committed);
2974 if (rs->rs_transno > exp->exp_last_committed) {
2975 /* not committed already */
2976 list_add_tail(&rs->rs_obd_list,
2977 &exp->exp_uncommitted_replies);
2979 spin_unlock(&exp->exp_uncommitted_replies_lock);
2981 spin_lock(&exp->exp_lock);
2982 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2983 spin_unlock(&exp->exp_lock);
2985 netrc = target_send_reply_msg(req, rc, fail_id);
2987 spin_lock(&svcpt->scp_rep_lock);
2989 atomic_inc(&svcpt->scp_nreps_difficult);
2992 /* error sending: reply is off the net. Also we need +1
2993 * reply ref until ptlrpc_handle_rs() is done
2994 * with the reply state (if the send was successful, there
2995 * would have been +1 ref for the net, which
2996 * reply_out_callback leaves alone) */
2998 ptlrpc_rs_addref(rs);
3001 spin_lock(&rs->rs_lock);
3002 if (rs->rs_transno <= exp->exp_last_committed ||
3003 (!rs->rs_on_net && !rs->rs_no_ack) ||
3004 list_empty(&rs->rs_exp_list) || /* completed already */
3005 list_empty(&rs->rs_obd_list)) {
3006 CDEBUG(D_HA, "Schedule reply immediately\n");
3007 ptlrpc_dispatch_difficult_reply(rs);
3009 list_add(&rs->rs_list, &svcpt->scp_rep_active);
3010 rs->rs_scheduled = 0; /* allow notifier to schedule */
3012 spin_unlock(&rs->rs_lock);
3013 spin_unlock(&svcpt->scp_rep_lock);
3017 enum ldlm_mode lck_compat_array[] = {
3018 [LCK_EX] = LCK_COMPAT_EX,
3019 [LCK_PW] = LCK_COMPAT_PW,
3020 [LCK_PR] = LCK_COMPAT_PR,
3021 [LCK_CW] = LCK_COMPAT_CW,
3022 [LCK_CR] = LCK_COMPAT_CR,
3023 [LCK_NL] = LCK_COMPAT_NL,
3024 [LCK_GROUP] = LCK_COMPAT_GROUP,
3025 [LCK_COS] = LCK_COMPAT_COS,
3029 * Rather arbitrary mapping from LDLM error codes to errno values. This should
3030 * not escape to the user level.
3032 int ldlm_error2errno(enum ldlm_error error)
3038 case ELDLM_LOCK_MATCHED:
3041 case ELDLM_LOCK_CHANGED:
3044 case ELDLM_LOCK_ABORTED:
3047 case ELDLM_LOCK_REPLACED:
3050 case ELDLM_NO_LOCK_DATA:
3053 case ELDLM_NAMESPACE_EXISTS:
3056 case ELDLM_BAD_NAMESPACE:
3060 if (((int)error) < 0) { /* cast to signed type */
3061 result = error; /* as ldlm_error can be unsigned */
3063 CERROR("Invalid DLM result code: %d\n", error);
3069 EXPORT_SYMBOL(ldlm_error2errno);
3072 * Dual to ldlm_error2errno(): maps errno values back to enum ldlm_error.
3074 enum ldlm_error ldlm_errno2error(int err_no)
3083 error = ELDLM_LOCK_CHANGED;
3086 error = ELDLM_LOCK_ABORTED;
3089 error = ELDLM_LOCK_REPLACED;
3092 error = ELDLM_NO_LOCK_DATA;
3095 error = ELDLM_NAMESPACE_EXISTS;
3098 error = ELDLM_BAD_NAMESPACE;
3106 #if LUSTRE_TRACKS_LOCK_EXP_REFS
3107 void ldlm_dump_export_locks(struct obd_export *exp)
3109 spin_lock(&exp->exp_locks_list_guard);
3110 if (!list_empty(&exp->exp_locks_list)) {
3111 struct ldlm_lock *lock;
3113 CERROR("dumping locks for export %p,"
3114 "ignore if the unmount doesn't hang\n", exp);
3115 list_for_each_entry(lock, &exp->exp_locks_list,
3117 LDLM_ERROR(lock, "lock:");
3119 spin_unlock(&exp->exp_locks_list_guard);
3123 #ifdef HAVE_SERVER_SUPPORT
3124 static int target_bulk_timeout(void *data)
3127 /* We don't fail the connection here, because having the export
3128 * killed makes the (vital) call to commitrw very sad.
3133 static inline const char *bulk2type(struct ptlrpc_request *req)
3135 if (req->rq_bulk_read)
3137 if (req->rq_bulk_write)
3142 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
3143 struct l_wait_info *lwi)
3145 struct ptlrpc_request *req = desc->bd_req;
3146 time_t start = cfs_time_current_sec();
3152 /* If there is eviction in progress, wait for it to finish. */
3153 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
3154 *lwi = LWI_INTR(NULL, NULL);
3155 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
3156 !atomic_read(&exp->exp_obd->
3157 obd_evict_inprogress),
3161 /* Check if client was evicted or reconnected already. */
3162 if (exp->exp_failed ||
3163 exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3166 if (req->rq_bulk_read)
3167 rc = sptlrpc_svc_wrap_bulk(req, desc);
3169 if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
3170 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
3171 else /* old version, bulk matchbits is rq_xid */
3172 req->rq_mbits = req->rq_xid;
3175 rc = ptlrpc_start_bulk_transfer(desc);
3179 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
3180 bulk2type(req), rc);
3184 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
3185 ptlrpc_abort_bulk(desc);
3189 /* limit actual bulk transfer to bulk_timeout seconds */
3190 deadline = start + bulk_timeout;
3191 if (deadline > req->rq_deadline)
3192 deadline = req->rq_deadline;
3195 long timeoutl = deadline - cfs_time_current_sec();
3196 cfs_duration_t timeout = timeoutl <= 0 ?
3197 CFS_TICK : cfs_time_seconds(timeoutl);
3200 *lwi = LWI_TIMEOUT_INTERVAL(timeout, cfs_time_seconds(1),
3201 target_bulk_timeout, desc);
3202 rc = l_wait_event(desc->bd_waitq,
3203 !ptlrpc_server_bulk_active(desc) ||
3206 lustre_msg_get_conn_cnt(req->rq_reqmsg),
3208 LASSERT(rc == 0 || rc == -ETIMEDOUT);
3209 /* Wait again if we changed rq_deadline. */
3210 rq_deadline = ACCESS_ONCE(req->rq_deadline);
3211 deadline = start + bulk_timeout;
3212 if (deadline > rq_deadline)
3213 deadline = rq_deadline;
3214 } while ((rc == -ETIMEDOUT) &&
3215 (deadline > cfs_time_current_sec()));
3217 if (rc == -ETIMEDOUT) {
3218 DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %ld%+lds",
3219 bulk2type(req), deadline - start,
3220 cfs_time_current_sec() - deadline);
3221 ptlrpc_abort_bulk(desc);
3222 } else if (exp->exp_failed) {
3223 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
3226 ptlrpc_abort_bulk(desc);
3227 } else if (exp->exp_conn_cnt >
3228 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3229 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
3231 /* We don't reply anyway. */
3233 ptlrpc_abort_bulk(desc);
3234 } else if (desc->bd_failure) {
3235 DEBUG_REQ(D_ERROR, req, "network error on bulk %s",
3237 /* XXX should this be a different errno? */
3240 if (req->rq_bulk_write)
3241 rc = sptlrpc_svc_unwrap_bulk(req, desc);
3242 if (rc == 0 && desc->bd_nob_transferred != desc->bd_nob) {
3243 DEBUG_REQ(D_ERROR, req, "truncated bulk %s %d(%d)",
3244 bulk2type(req), desc->bd_nob_transferred,
3246 /* XXX should this be a different errno? */
3253 EXPORT_SYMBOL(target_bulk_io);
3255 #endif /* HAVE_SERVER_SUPPORT */