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, 2016, 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;
59 lnet_nid_t nid4refnet = LNET_NID_ANY;
63 if (!create && !priority) {
64 CDEBUG(D_HA, "Nothing to do\n");
68 if (imp->imp_connection &&
69 imp->imp_connection->c_remote_uuid.uuid[0] == 0)
70 /* nid4refnet is used to restrict network connections */
71 nid4refnet = imp->imp_connection->c_self;
72 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid, nid4refnet);
74 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
79 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
81 GOTO(out_put, rc = -ENOMEM);
84 spin_lock(&imp->imp_lock);
85 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
86 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
88 list_del(&item->oic_item);
89 list_add(&item->oic_item,
91 item->oic_last_attempt = 0;
93 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
94 imp, imp->imp_obd->obd_name, uuid->uuid,
95 (priority ? ", moved to head" : ""));
96 spin_unlock(&imp->imp_lock);
97 GOTO(out_free, rc = 0);
100 /* No existing import connection found for \a uuid. */
102 imp_conn->oic_conn = ptlrpc_conn;
103 imp_conn->oic_uuid = *uuid;
104 imp_conn->oic_last_attempt = 0;
106 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
108 list_add_tail(&imp_conn->oic_item,
109 &imp->imp_conn_list);
110 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
111 imp, imp->imp_obd->obd_name, uuid->uuid,
112 (priority ? "head" : "tail"));
114 spin_unlock(&imp->imp_lock);
115 GOTO(out_free, rc = -ENOENT);
118 spin_unlock(&imp->imp_lock);
122 OBD_FREE(imp_conn, sizeof(*imp_conn));
124 ptlrpc_connection_put(ptlrpc_conn);
128 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
130 return import_set_conn(imp, uuid, 1, 0);
133 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
136 return import_set_conn(imp, uuid, priority, 1);
138 EXPORT_SYMBOL(client_import_add_conn);
140 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
142 struct obd_import_conn *imp_conn;
143 struct obd_export *dlmexp;
147 spin_lock(&imp->imp_lock);
148 if (list_empty(&imp->imp_conn_list)) {
149 LASSERT(!imp->imp_connection);
153 list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
154 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
156 LASSERT(imp_conn->oic_conn);
158 if (imp_conn == imp->imp_conn_current) {
159 LASSERT(imp_conn->oic_conn == imp->imp_connection);
161 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
162 imp->imp_state != LUSTRE_IMP_DISCON) {
163 CERROR("can't remove current connection\n");
164 GOTO(out, rc = -EBUSY);
167 ptlrpc_connection_put(imp->imp_connection);
168 imp->imp_connection = NULL;
170 dlmexp = class_conn2export(&imp->imp_dlm_handle);
171 if (dlmexp && dlmexp->exp_connection) {
172 LASSERT(dlmexp->exp_connection ==
174 ptlrpc_connection_put(dlmexp->exp_connection);
175 dlmexp->exp_connection = NULL;
179 class_export_put(dlmexp);
182 list_del(&imp_conn->oic_item);
183 ptlrpc_connection_put(imp_conn->oic_conn);
184 OBD_FREE(imp_conn, sizeof(*imp_conn));
185 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
186 imp, imp->imp_obd->obd_name, uuid->uuid);
191 spin_unlock(&imp->imp_lock);
193 CERROR("connection %s not found\n", uuid->uuid);
196 EXPORT_SYMBOL(client_import_del_conn);
199 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
200 * to find a conn uuid of \a imp which can reach \a peer.
202 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
203 struct obd_uuid *uuid)
205 struct obd_import_conn *conn;
209 spin_lock(&imp->imp_lock);
210 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
211 /* Check if conn UUID does have this peer NID. */
212 if (class_check_uuid(&conn->oic_uuid, peer)) {
213 *uuid = conn->oic_uuid;
218 spin_unlock(&imp->imp_lock);
221 EXPORT_SYMBOL(client_import_find_conn);
223 void client_destroy_import(struct obd_import *imp)
225 /* Drop security policy instance after all RPCs have finished/aborted
226 * to let all busy contexts be released. */
227 class_import_get(imp);
228 class_destroy_import(imp);
229 sptlrpc_import_sec_put(imp);
230 class_import_put(imp);
232 EXPORT_SYMBOL(client_destroy_import);
235 * Check whether or not the OSC is on MDT.
238 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
240 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
243 static int osc_on_mdt(char *obdname)
247 ptr = strrchr(obdname, '-');
251 if (strncmp(ptr + 1, "MDT", 3) == 0)
257 /* Configure an RPC client OBD device.
262 * 3 - inactive-on-startup
263 * 4 - restrictive net
265 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
267 struct client_obd *cli = &obddev->u.cli;
268 struct obd_import *imp;
269 struct obd_uuid server_uuid;
270 int rq_portal, rp_portal, connect_op;
271 char *name = obddev->obd_type->typ_name;
272 enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
273 char *cli_name = lustre_cfg_buf(lcfg, 0);
274 struct ptlrpc_connection fake_conn = { .c_self = 0,
275 .c_remote_uuid.uuid[0] = 0 };
279 /* In a more perfect world, we would hang a ptlrpc_client off of
280 * obd_type and just use the values from there. */
281 if (!strcmp(name, LUSTRE_OSC_NAME)) {
282 rq_portal = OST_REQUEST_PORTAL;
283 rp_portal = OSC_REPLY_PORTAL;
284 connect_op = OST_CONNECT;
285 cli->cl_sp_me = LUSTRE_SP_CLI;
286 cli->cl_sp_to = LUSTRE_SP_OST;
287 ns_type = LDLM_NS_TYPE_OSC;
288 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
289 !strcmp(name, LUSTRE_LWP_NAME)) {
290 rq_portal = MDS_REQUEST_PORTAL;
291 rp_portal = MDC_REPLY_PORTAL;
292 connect_op = MDS_CONNECT;
293 if (is_lwp_on_ost(cli_name))
294 cli->cl_sp_me = LUSTRE_SP_OST;
295 else if (is_lwp_on_mdt(cli_name))
296 cli->cl_sp_me = LUSTRE_SP_MDT;
298 cli->cl_sp_me = LUSTRE_SP_CLI;
299 cli->cl_sp_to = LUSTRE_SP_MDT;
300 ns_type = LDLM_NS_TYPE_MDC;
301 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
302 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
303 /* OSP_on_MDT for other MDTs */
304 connect_op = MDS_CONNECT;
305 cli->cl_sp_to = LUSTRE_SP_MDT;
306 ns_type = LDLM_NS_TYPE_MDC;
307 rq_portal = OUT_PORTAL;
309 /* OSP on MDT for OST */
310 connect_op = OST_CONNECT;
311 cli->cl_sp_to = LUSTRE_SP_OST;
312 ns_type = LDLM_NS_TYPE_OSC;
313 rq_portal = OST_REQUEST_PORTAL;
315 rp_portal = OSC_REPLY_PORTAL;
316 cli->cl_sp_me = LUSTRE_SP_MDT;
317 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
318 rq_portal = MGS_REQUEST_PORTAL;
319 rp_portal = MGC_REPLY_PORTAL;
320 connect_op = MGS_CONNECT;
321 cli->cl_sp_me = LUSTRE_SP_MGC;
322 cli->cl_sp_to = LUSTRE_SP_MGS;
323 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
324 ns_type = LDLM_NS_TYPE_MGC;
326 CERROR("unknown client OBD type \"%s\", can't setup\n",
331 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
332 CERROR("requires a TARGET UUID\n");
336 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
337 CERROR("client UUID must be less than 38 characters\n");
341 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
342 CERROR("setup requires a SERVER UUID\n");
346 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
347 CERROR("target UUID must be less than 38 characters\n");
351 init_rwsem(&cli->cl_sem);
352 mutex_init(&cli->cl_mgc_mutex);
354 init_rwsem(&cli->cl_seq_rwsem);
355 cli->cl_conn_count = 0;
356 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
357 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
358 sizeof(server_uuid)));
360 cli->cl_dirty_pages = 0;
361 cli->cl_avail_grant = 0;
362 /* FIXME: Should limit this for the sum of all cl_dirty_max_pages. */
363 /* cl_dirty_max_pages may be changed at connect time in
364 * ptlrpc_connect_interpret(). */
365 client_adjust_max_dirty(cli);
366 INIT_LIST_HEAD(&cli->cl_cache_waiters);
367 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
368 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
369 INIT_LIST_HEAD(&cli->cl_loi_write_list);
370 INIT_LIST_HEAD(&cli->cl_loi_read_list);
371 spin_lock_init(&cli->cl_loi_list_lock);
372 atomic_set(&cli->cl_pending_w_pages, 0);
373 atomic_set(&cli->cl_pending_r_pages, 0);
374 cli->cl_r_in_flight = 0;
375 cli->cl_w_in_flight = 0;
377 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
378 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
379 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
380 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
381 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
382 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
385 INIT_LIST_HEAD(&cli->cl_lru_osc);
386 atomic_set(&cli->cl_lru_shrinkers, 0);
387 atomic_long_set(&cli->cl_lru_busy, 0);
388 atomic_long_set(&cli->cl_lru_in_list, 0);
389 INIT_LIST_HEAD(&cli->cl_lru_list);
390 spin_lock_init(&cli->cl_lru_list_lock);
391 atomic_long_set(&cli->cl_unstable_count, 0);
392 INIT_LIST_HEAD(&cli->cl_shrink_list);
394 init_waitqueue_head(&cli->cl_destroy_waitq);
395 atomic_set(&cli->cl_destroy_in_flight, 0);
396 #ifdef ENABLE_CHECKSUM
397 /* Turn on checksumming by default. */
398 cli->cl_checksum = 1;
400 * The supported checksum types will be worked out at connect time
401 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
404 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
406 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
408 /* Set it to possible maximum size. It may be reduced by ocd_brw_size
409 * from OFD after connecting. */
410 cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
412 /* set cl_chunkbits default value to PAGE_SHIFT,
413 * it will be updated at OSC connection time. */
414 cli->cl_chunkbits = PAGE_SHIFT;
416 if (!strcmp(name, LUSTRE_MDC_NAME)) {
417 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
418 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 128 /* MB */) {
419 cli->cl_max_rpcs_in_flight = 2;
420 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 256 /* MB */) {
421 cli->cl_max_rpcs_in_flight = 3;
422 } else if (totalram_pages >> (20 - PAGE_SHIFT) <= 512 /* MB */) {
423 cli->cl_max_rpcs_in_flight = 4;
425 if (osc_on_mdt(obddev->obd_name))
426 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_MAX;
428 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
431 spin_lock_init(&cli->cl_mod_rpcs_lock);
432 spin_lock_init(&cli->cl_mod_rpcs_hist.oh_lock);
433 cli->cl_max_mod_rpcs_in_flight = 0;
434 cli->cl_mod_rpcs_in_flight = 0;
435 cli->cl_close_rpcs_in_flight = 0;
436 init_waitqueue_head(&cli->cl_mod_rpcs_waitq);
437 cli->cl_mod_tag_bitmap = NULL;
439 INIT_LIST_HEAD(&cli->cl_chg_dev_linkage);
441 if (connect_op == MDS_CONNECT) {
442 cli->cl_max_mod_rpcs_in_flight = cli->cl_max_rpcs_in_flight - 1;
443 OBD_ALLOC(cli->cl_mod_tag_bitmap,
444 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
445 if (cli->cl_mod_tag_bitmap == NULL)
446 GOTO(err, rc = -ENOMEM);
451 CERROR("ldlm_get_ref failed: %d\n", rc);
455 ptlrpc_init_client(rq_portal, rp_portal, name,
456 &obddev->obd_ldlm_client);
458 imp = class_new_import(obddev);
460 GOTO(err_ldlm, rc = -ENOENT);
461 imp->imp_client = &obddev->obd_ldlm_client;
462 imp->imp_connect_op = connect_op;
463 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
464 LUSTRE_CFG_BUFLEN(lcfg, 1));
465 class_import_put(imp);
467 if (lustre_cfg_buf(lcfg, 4)) {
468 __u32 refnet = libcfs_str2net(lustre_cfg_string(lcfg, 4));
470 if (refnet == LNET_NIDNET(LNET_NID_ANY)) {
472 CERROR("%s: bad mount option 'network=%s': rc = %d\n",
473 obddev->obd_name, lustre_cfg_string(lcfg, 4),
475 GOTO(err_import, rc);
477 fake_conn.c_self = LNET_MKNID(refnet, 0);
478 imp->imp_connection = &fake_conn;
481 rc = client_import_add_conn(imp, &server_uuid, 1);
483 CERROR("can't add initial connection\n");
484 GOTO(err_import, rc);
486 imp->imp_connection = NULL;
488 cli->cl_import = imp;
489 /* cli->cl_max_mds_easize updated by mdc_init_ea_size() */
490 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
492 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
493 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
494 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
495 name, obddev->obd_name,
496 cli->cl_target_uuid.uuid);
497 spin_lock(&imp->imp_lock);
498 imp->imp_deactive = 1;
499 spin_unlock(&imp->imp_lock);
503 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
504 LDLM_NAMESPACE_CLIENT,
505 LDLM_NAMESPACE_GREEDY,
507 if (obddev->obd_namespace == NULL) {
508 CERROR("Unable to create client namespace - %s\n",
510 GOTO(err_import, rc = -ENOMEM);
516 class_destroy_import(imp);
520 if (cli->cl_mod_tag_bitmap != NULL)
521 OBD_FREE(cli->cl_mod_tag_bitmap,
522 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
523 cli->cl_mod_tag_bitmap = NULL;
527 EXPORT_SYMBOL(client_obd_setup);
529 int client_obd_cleanup(struct obd_device *obddev)
531 struct client_obd *cli = &obddev->u.cli;
534 ldlm_namespace_free_post(obddev->obd_namespace);
535 obddev->obd_namespace = NULL;
537 obd_cleanup_client_import(obddev);
538 LASSERT(obddev->u.cli.cl_import == NULL);
542 if (cli->cl_mod_tag_bitmap != NULL)
543 OBD_FREE(cli->cl_mod_tag_bitmap,
544 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
545 cli->cl_mod_tag_bitmap = NULL;
549 EXPORT_SYMBOL(client_obd_cleanup);
551 /* ->o_connect() method for client side (OSC and MDC and MGC) */
552 int client_connect_import(const struct lu_env *env,
553 struct obd_export **exp,
554 struct obd_device *obd, struct obd_uuid *cluuid,
555 struct obd_connect_data *data, void *localdata)
557 struct client_obd *cli = &obd->u.cli;
558 struct obd_import *imp = cli->cl_import;
559 struct obd_connect_data *ocd;
560 struct lustre_handle conn = { 0 };
565 down_write(&cli->cl_sem);
566 if (cli->cl_conn_count > 0)
567 GOTO(out_sem, rc = -EALREADY);
569 rc = class_connect(&conn, obd, cluuid);
573 cli->cl_conn_count++;
574 *exp = class_conn2export(&conn);
576 LASSERT(obd->obd_namespace);
578 imp->imp_dlm_handle = conn;
579 rc = ptlrpc_init_import(imp);
583 ocd = &imp->imp_connect_data;
586 imp->imp_connect_flags_orig = data->ocd_connect_flags;
587 imp->imp_connect_flags2_orig = data->ocd_connect_flags2;
590 rc = ptlrpc_connect_import(imp);
592 LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
595 LASSERT(*exp != NULL && (*exp)->exp_connection);
598 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
599 ocd->ocd_connect_flags, "old %#llx, new %#llx\n",
600 data->ocd_connect_flags, ocd->ocd_connect_flags);
601 data->ocd_connect_flags = ocd->ocd_connect_flags;
602 data->ocd_connect_flags2 = ocd->ocd_connect_flags2;
605 ptlrpc_pinger_add_import(imp);
611 cli->cl_conn_count--;
612 class_disconnect(*exp);
616 up_write(&cli->cl_sem);
620 EXPORT_SYMBOL(client_connect_import);
622 int client_disconnect_export(struct obd_export *exp)
624 struct obd_device *obd = class_exp2obd(exp);
625 struct client_obd *cli;
626 struct obd_import *imp;
631 CERROR("invalid export for disconnect: exp %p cookie %#llx\n",
632 exp, exp ? exp->exp_handle.h_cookie : -1);
637 imp = cli->cl_import;
639 down_write(&cli->cl_sem);
640 CDEBUG(D_INFO, "disconnect %s - %zu\n", obd->obd_name,
643 if (cli->cl_conn_count == 0) {
644 CERROR("disconnecting disconnected device (%s)\n",
646 GOTO(out_disconnect, rc = -EINVAL);
649 cli->cl_conn_count--;
650 if (cli->cl_conn_count != 0)
651 GOTO(out_disconnect, rc = 0);
653 /* Mark import deactivated now, so we don't try to reconnect if any
654 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
655 * fully deactivate the import, or that would drop all requests. */
656 spin_lock(&imp->imp_lock);
657 imp->imp_deactive = 1;
658 spin_unlock(&imp->imp_lock);
660 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
661 * delete it regardless. (It's safe to delete an import that was
663 (void)ptlrpc_pinger_del_import(imp);
665 if (obd->obd_namespace != NULL) {
666 /* obd_force == local only */
667 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
668 obd->obd_force ? LCF_LOCAL : 0, NULL);
669 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
672 /* There's no need to hold sem while disconnecting an import,
673 * and it may actually cause deadlock in GSS. */
674 up_write(&cli->cl_sem);
675 rc = ptlrpc_disconnect_import(imp, 0);
676 down_write(&cli->cl_sem);
678 ptlrpc_invalidate_import(imp);
683 /* Use server style - class_disconnect should be always called for
685 err = class_disconnect(exp);
689 up_write(&cli->cl_sem);
693 EXPORT_SYMBOL(client_disconnect_export);
695 #ifdef HAVE_SERVER_SUPPORT
696 int server_disconnect_export(struct obd_export *exp)
701 /* Disconnect early so that clients can't keep using export. */
702 rc = class_disconnect(exp);
703 /* Close import to avoid sending any requests. */
704 if (exp->exp_imp_reverse)
705 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
707 ldlm_bl_thread_wakeup();
709 /* complete all outstanding replies */
710 spin_lock(&exp->exp_lock);
711 while (!list_empty(&exp->exp_outstanding_replies)) {
712 struct ptlrpc_reply_state *rs =
713 list_entry(exp->exp_outstanding_replies.next,
714 struct ptlrpc_reply_state, rs_exp_list);
715 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
717 spin_lock(&svcpt->scp_rep_lock);
719 list_del_init(&rs->rs_exp_list);
721 spin_lock(&rs->rs_lock);
722 /* clear rs_convert_lock to make sure rs is handled and put */
723 rs->rs_convert_lock = 0;
724 ptlrpc_schedule_difficult_reply(rs);
725 spin_unlock(&rs->rs_lock);
727 spin_unlock(&svcpt->scp_rep_lock);
729 spin_unlock(&exp->exp_lock);
733 EXPORT_SYMBOL(server_disconnect_export);
735 /* --------------------------------------------------------------------------
736 * from old lib/target.c
737 * -------------------------------------------------------------------------- */
739 static int target_handle_reconnect(struct lustre_handle *conn,
740 struct obd_export *exp,
741 struct obd_uuid *cluuid)
743 struct obd_device *target;
744 struct lustre_handle *hdl;
751 hdl = &exp->exp_imp_reverse->imp_remote_handle;
752 if (!exp->exp_connection || !lustre_handle_is_used(hdl)) {
753 conn->cookie = exp->exp_handle.h_cookie;
754 CDEBUG(D_HA, "connect export for UUID '%s' at %p,"
755 " cookie %#llx\n", cluuid->uuid, exp, conn->cookie);
759 target = exp->exp_obd;
761 /* Might be a re-connect after a partition. */
762 if (memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
763 LCONSOLE_WARN("%s: already connected client %s (at %s) "
764 "with handle %#llx. Rejecting client "
765 "with the same UUID trying to reconnect "
766 "with handle %#llx\n", target->obd_name,
767 obd_uuid2str(&exp->exp_client_uuid),
768 obd_export_nid2str(exp),
769 hdl->cookie, conn->cookie);
770 memset(conn, 0, sizeof *conn);
771 /* target_handle_connect() treats EALREADY and
772 * -EALREADY differently. -EALREADY is an error
773 * (same UUID, different handle). */
777 if (!target->obd_recovering) {
778 LCONSOLE_WARN("%s: Client %s (at %s) reconnecting\n",
779 target->obd_name, obd_uuid2str(&exp->exp_client_uuid),
780 obd_export_nid2str(exp));
781 GOTO(out_already, rc);
784 now = ktime_get_seconds();
785 deadline = cfs_duration_sec(target->obd_recovery_timer.expires);
786 if (now < deadline) {
787 struct target_distribute_txn_data *tdtd;
792 timeout = deadline - now;
793 tdtd = class_exp2tgt(exp)->lut_tdtd;
794 if (tdtd && tdtd->tdtd_show_update_logs_retrievers)
795 buf = tdtd->tdtd_show_update_logs_retrievers(
796 tdtd->tdtd_show_retrievers_cbdata,
800 LCONSOLE_WARN("%s: Recovery already passed deadline "
801 "%lld:%.02lld. It is due to DNE recovery "
802 "failed/stuck on the %d MDT(s):%s. "
803 "Please wait until all MDTs recovered "
804 "or abort the recovery by force.\n",
805 target->obd_name, timeout / 60,
807 buf ? buf : "unknown (not enough RAM)");
809 LCONSOLE_WARN("%s: Recovery already passed deadline "
810 "%lld:%.02lld. If you do not want to wait "
811 "more, please abort the recovery by "
812 "force.\n", target->obd_name,
813 timeout / 60, timeout % 60);
818 timeout = now - deadline;
819 LCONSOLE_WARN("%s: Recovery already passed deadline"
820 " %lld:%.02lld, It is most likely due to DNE"
821 " recovery is failed or stuck, please wait a"
822 " few more minutes or abort the recovery.\n",
823 target->obd_name, timeout / 60, timeout % 60);
827 conn->cookie = exp->exp_handle.h_cookie;
828 /* target_handle_connect() treats EALREADY and
829 * -EALREADY differently. EALREADY means we are
830 * doing a valid reconnect from the same client. */
835 check_and_start_recovery_timer(struct obd_device *obd,
836 struct ptlrpc_request *req, int new_client);
839 * update flags for import during reconnect process
841 static int rev_import_flags_update(struct obd_import *revimp,
842 struct ptlrpc_request *req)
845 struct obd_connect_data *data;
847 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
849 if (data->ocd_connect_flags & OBD_CONNECT_AT)
850 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
852 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
854 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
856 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
858 CERROR("%s: cannot get reverse import %s security: rc = %d\n",
859 revimp->imp_client->cli_name,
860 libcfs_id2str(req->rq_peer), rc);
868 * Allocate a new reverse import for an export.
870 * \retval -errno in case error hit
871 * \retval 0 if reverse import correctly init
873 int rev_import_init(struct obd_export *export)
875 struct obd_device *obd = export->exp_obd;
876 struct obd_import *revimp;
878 LASSERT(export->exp_imp_reverse == NULL);
880 revimp = class_new_import(obd);
884 revimp->imp_remote_handle.cookie = 0ULL;
885 revimp->imp_client = &obd->obd_ldlm_client;
886 revimp->imp_dlm_fake = 1;
888 /* it is safe to connect import in new state as no sends possible */
889 spin_lock(&export->exp_lock);
890 export->exp_imp_reverse = revimp;
891 spin_unlock(&export->exp_lock);
892 class_import_put(revimp);
896 EXPORT_SYMBOL(rev_import_init);
899 * Handle reconnect for an export.
901 * \param exp export to handle reconnect process
902 * \param req client reconnect request
904 * \retval -rc in case securitfy flavor can't be changed
905 * \retval 0 in case none problems
907 static int rev_import_reconnect(struct obd_export *exp,
908 struct ptlrpc_request *req)
910 struct obd_import *revimp = exp->exp_imp_reverse;
911 struct lustre_handle *lh;
914 /* avoid sending a request until import flags are changed */
915 ptlrpc_import_enter_resend(revimp);
917 if (revimp->imp_connection != NULL)
918 ptlrpc_connection_put(revimp->imp_connection);
921 * client from recovery don't have a handle so we need to take from
922 * request. it may produce situation when wrong client connected
923 * to recovery as we trust a client uuid
925 lh = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
926 revimp->imp_remote_handle = *lh;
928 /* unknown versions will be caught in
929 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
930 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
932 revimp->imp_connection = ptlrpc_connection_addref(exp->exp_connection);
934 rc = rev_import_flags_update(revimp, req);
936 /* it is safe to still be in RECOVERY phase as we are not able
937 * to setup correct security flavor so requests are not able to
938 * be delivered correctly */
942 /* resend all rpc's via new connection */
943 return ptlrpc_import_recovery_state_machine(revimp);
946 int target_handle_connect(struct ptlrpc_request *req)
948 struct obd_device *target = NULL;
949 struct obd_export *export = NULL;
950 /* connect handle - filled from target_handle_reconnect in
952 struct lustre_handle conn;
953 struct lustre_handle *tmp;
954 struct obd_uuid cluuid;
959 bool mds_conn = false, lw_client = false, initial_conn = false;
960 bool mds_mds_conn = false;
961 bool new_mds_mds_conn = false;
962 struct obd_connect_data *data, *tmpdata;
964 lnet_nid_t *client_nid = NULL;
967 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
969 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
971 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
972 GOTO(out, rc = -EINVAL);
975 target = class_dev_by_str(str);
977 deuuidify(str, NULL, &target_start, &target_len);
978 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
979 "from %s (no target). If you are running "
980 "an HA pair check that the target is "
981 "mounted on the other server.\n", str,
982 libcfs_nid2str(req->rq_peer.nid));
983 GOTO(out, rc = -ENODEV);
986 spin_lock(&target->obd_dev_lock);
988 target->obd_conn_inprogress++;
990 if (target->obd_stopping || !target->obd_set_up) {
991 spin_unlock(&target->obd_dev_lock);
993 deuuidify(str, NULL, &target_start, &target_len);
994 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
995 target_len, target_start,
996 libcfs_nid2str(req->rq_peer.nid),
997 (target->obd_stopping ?
998 "stopping" : "not set up"));
999 GOTO(out, rc = -ENODEV);
1002 if (target->obd_no_conn) {
1003 spin_unlock(&target->obd_dev_lock);
1005 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
1006 "from %s\n", target->obd_name,
1007 libcfs_nid2str(req->rq_peer.nid));
1008 GOTO(out, rc = -EAGAIN);
1011 spin_unlock(&target->obd_dev_lock);
1013 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
1015 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
1016 GOTO(out, rc = -EINVAL);
1019 obd_str2uuid(&cluuid, str);
1021 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1023 GOTO(out, rc = -EPROTO);
1027 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1029 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
1031 GOTO(out, rc = -EPROTO);
1033 rc = req_capsule_server_pack(&req->rq_pill);
1037 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
1038 /* Don't allow clients to connect that are using old 1.8 format
1039 * protocol conventions (LUSTRE_MSG_MAGIC_v1, !MSGHDR_CKSUM_INCOMPAT18,
1040 * ldlm_flock_policy_wire format, MDT_ATTR_xTIME_SET, etc). The
1041 * FULL20 flag should be set on all connections since 2.0, but no
1042 * longer affects behaviour.
1044 * Later this check will be disabled and the flag can be retired
1045 * completely once interop with 3.0 is no longer needed.
1047 if (!(data->ocd_connect_flags & OBD_CONNECT_FULL20))
1048 GOTO(out, rc = -EPROTO);
1050 /* Don't allow liblustre clients to connect.
1051 * - testing was disabled in v2_2_50_0-61-g6a75d65
1052 * - building was disabled in v2_5_58_0-28-g7277179
1053 * - client code was deleted in v2_6_50_0-101-gcdfbc72,
1054 * - clients were refused connect for version difference > 0.0.1.32 */
1055 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1056 DEBUG_REQ(D_WARNING, req, "Refusing libclient connection");
1057 GOTO(out, rc = -EPROTO);
1061 /* Note: lw_client is needed in MDS-MDS failover during update log
1062 * processing, so we needs to allow lw_client to be connected at
1063 * anytime, instead of only the initial connection */
1064 lw_client = (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0;
1066 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) {
1067 initial_conn = true;
1068 mds_conn = (data->ocd_connect_flags & OBD_CONNECT_MDS) != 0;
1069 mds_mds_conn = (data->ocd_connect_flags &
1070 OBD_CONNECT_MDS_MDS) != 0;
1072 /* OBD_CONNECT_MNE_SWAB is defined as OBD_CONNECT_MDS_MDS
1073 * for Imperative Recovery connection from MGC to MGS.
1075 * Via check OBD_CONNECT_FID, we can distinguish whether
1076 * the OBD_CONNECT_MDS_MDS/OBD_CONNECT_MNE_SWAB is from
1079 (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1080 (data->ocd_connect_flags & OBD_CONNECT_FID) &&
1081 (data->ocd_connect_flags & OBD_CONNECT_VERSION)) {
1082 __u32 major = OBD_OCD_VERSION_MAJOR(data->ocd_version);
1083 __u32 minor = OBD_OCD_VERSION_MINOR(data->ocd_version);
1084 __u32 patch = OBD_OCD_VERSION_PATCH(data->ocd_version);
1086 /* We do not support the MDT-MDT interoperations with
1087 * different version MDT because of protocol changes. */
1088 if (unlikely(major != LUSTRE_MAJOR ||
1089 minor != LUSTRE_MINOR ||
1090 abs(patch - LUSTRE_PATCH) > 3)) {
1091 LCONSOLE_WARN("%s (%u.%u.%u.%u) refused the "
1092 "connection from different version MDT "
1093 "(%d.%d.%d.%d) %s %s\n",
1094 target->obd_name, LUSTRE_MAJOR,
1095 LUSTRE_MINOR, LUSTRE_PATCH, LUSTRE_FIX,
1096 major, minor, patch,
1097 OBD_OCD_VERSION_FIX(data->ocd_version),
1098 libcfs_nid2str(req->rq_peer.nid), str);
1100 GOTO(out, rc = -EPROTO);
1105 /* lctl gets a backstage, all-access pass. */
1106 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
1107 goto dont_check_exports;
1109 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
1113 /* We've found an export in the hash. */
1115 spin_lock(&export->exp_lock);
1117 if (export->exp_connecting) { /* bug 9635, et. al. */
1118 spin_unlock(&export->exp_lock);
1119 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
1120 export->exp_obd->obd_name, export,
1121 libcfs_nid2str(req->rq_peer.nid));
1122 class_export_put(export);
1125 } else if ((mds_conn || (lw_client && initial_conn) ||
1126 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1127 export->exp_connection != NULL) {
1128 spin_unlock(&export->exp_lock);
1129 if (req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1130 /* MDS or LWP reconnected after failover. */
1131 LCONSOLE_WARN("%s: Received %s connection from "
1132 "%s, removing former export from %s\n",
1133 target->obd_name, mds_conn ? "MDS" : "LWP",
1134 libcfs_nid2str(req->rq_peer.nid),
1135 libcfs_nid2str(export->exp_connection->c_peer.nid));
1137 /* New MDS connection from the same NID. */
1138 LCONSOLE_WARN("%s: Received new %s connection from "
1139 "%s, removing former export from same NID\n",
1140 target->obd_name, mds_conn ? "MDS" : "LWP",
1141 libcfs_nid2str(req->rq_peer.nid));
1144 if (req->rq_peer.nid == export->exp_connection->c_peer.nid &&
1145 data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) {
1146 /* Because exports between MDTs will always be
1147 * kept, let's do not fail such export if they
1148 * come from the same NID, otherwise it might
1149 * cause eviction between MDTs, which might
1150 * cause namespace inconsistency */
1151 spin_lock(&export->exp_lock);
1152 export->exp_connecting = 1;
1153 spin_unlock(&export->exp_lock);
1154 conn.cookie = export->exp_handle.h_cookie;
1157 class_fail_export(export);
1158 class_export_put(export);
1162 } else if (export->exp_connection != NULL && initial_conn &&
1163 req->rq_peer.nid != export->exp_connection->c_peer.nid) {
1164 spin_unlock(&export->exp_lock);
1165 /* In MDS failover we have static UUID but NID can change. */
1166 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
1167 "existing nid %s is already connected\n",
1168 target->obd_name, cluuid.uuid,
1169 libcfs_nid2str(req->rq_peer.nid),
1171 export->exp_connection->c_peer.nid));
1173 class_export_put(export);
1176 export->exp_connecting = 1;
1177 spin_unlock(&export->exp_lock);
1178 LASSERT(export->exp_obd == target);
1180 rc = target_handle_reconnect(&conn, export, &cluuid);
1183 /* If we found an export, we already unlocked. */
1186 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
1187 } else if (req->rq_export == NULL &&
1188 atomic_read(&export->exp_rpc_count) > 0) {
1189 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
1190 "still busy with %d references\n",
1191 target->obd_name, cluuid.uuid,
1192 libcfs_nid2str(req->rq_peer.nid),
1193 atomic_read(&export->exp_refcount));
1194 GOTO(out, rc = -EBUSY);
1195 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
1196 if (!strstr(cluuid.uuid, "mdt"))
1197 LCONSOLE_WARN("%s: Rejecting reconnect from the "
1198 "known client %s (at %s) because it "
1199 "is indicating it is a new client",
1200 target->obd_name, cluuid.uuid,
1201 libcfs_nid2str(req->rq_peer.nid));
1202 GOTO(out, rc = -EALREADY);
1204 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1211 CDEBUG(D_HA, "%s: connection from %s@%s %st%llu exp %p cur %lld last %lld\n",
1212 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1213 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1214 export, ktime_get_real_seconds(),
1215 export ? export->exp_last_request_time : 0);
1217 /* If this is the first time a client connects, reset the recovery
1218 * timer. Discard lightweight connections which might be local. */
1219 if (!lw_client && rc == 0 && target->obd_recovering)
1220 check_and_start_recovery_timer(target, req, export == NULL);
1222 /* We want to handle EALREADY but *not* -EALREADY from
1223 * target_handle_reconnect(), return reconnection state in a flag. */
1224 if (rc == EALREADY) {
1225 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1231 /* Tell the client if we support replayable requests. */
1232 if (target->obd_replayable)
1233 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1234 client_nid = &req->rq_peer.nid;
1236 if (export == NULL) {
1237 /* allow lightweight connections during recovery */
1238 /* allow "new" MDT to be connected during recovery, since we
1239 * need retrieve recovery update records from it */
1240 if (target->obd_recovering && !lw_client && !mds_mds_conn) {
1242 int c; /* connected */
1243 int i; /* in progress */
1245 int s; /* stale/evicted */
1247 c = atomic_read(&target->obd_connected_clients);
1248 i = atomic_read(&target->obd_lock_replay_clients);
1249 k = target->obd_max_recoverable_clients;
1250 s = target->obd_stale_clients;
1251 t = target->obd_recovery_timer.expires;
1252 t = cfs_duration_sec(target->obd_recovery_timer.expires);
1253 t -= ktime_get_seconds();
1254 LCONSOLE_WARN("%s: Denying connection for new client %s"
1255 "(at %s), waiting for %d known clients "
1256 "(%d recovered, %d in progress, and %d "
1257 "evicted) to recover in %lld:%.02lld\n",
1258 target->obd_name, cluuid.uuid,
1259 libcfs_nid2str(req->rq_peer.nid), k,
1260 c - i, i, s, t / 60, t % 60);
1264 rc = obd_connect(req->rq_svc_thread->t_env,
1265 &export, target, &cluuid, data,
1267 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1268 lustre_msg_add_op_flags(req->rq_repmsg,
1269 MSG_CONNECT_RECOVERING);
1271 conn.cookie = export->exp_handle.h_cookie;
1272 rc = rev_import_init(export);
1276 new_mds_mds_conn = true;
1279 rc = obd_reconnect(req->rq_svc_thread->t_env,
1280 export, target, &cluuid, data, client_nid);
1285 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1286 data->ocd_instance = target->u.obt.obt_instance;
1288 /* Return only the parts of obd_connect_data that we understand, so the
1289 * client knows that we don't understand the rest. */
1291 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1293 tmpdata = req_capsule_server_get(&req->rq_pill,
1295 /* Don't use struct assignment here, because the client reply
1296 * buffer may be smaller/larger than the local struct
1297 * obd_connect_data. */
1298 memcpy(tmpdata, data, min(tmpsize, size));
1301 /* If the client and the server are the same node, we will already
1302 * have an export that really points to the client's DLM export,
1303 * because we have a shared handles table.
1305 * XXX this will go away when shaver stops sending the "connect" handle
1306 * in the real "remote handle" field of the request --phik 24 Apr 2003
1308 ptlrpc_request_change_export(req, export);
1310 spin_lock(&export->exp_lock);
1311 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1312 spin_unlock(&export->exp_lock);
1313 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1314 "or equal conn_cnt: %d >= %d\n",
1315 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1316 export->exp_conn_cnt,
1317 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1319 GOTO(out, rc = -EALREADY);
1321 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1322 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1323 spin_unlock(&export->exp_lock);
1325 if (export->exp_connection != NULL) {
1326 /* Check to see if connection came from another NID. */
1327 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1328 !hlist_unhashed(&export->exp_nid_hash))
1329 cfs_hash_del(export->exp_obd->obd_nid_hash,
1330 &export->exp_connection->c_peer.nid,
1331 &export->exp_nid_hash);
1333 ptlrpc_connection_put(export->exp_connection);
1336 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1339 if (hlist_unhashed(&export->exp_nid_hash))
1340 cfs_hash_add(export->exp_obd->obd_nid_hash,
1341 &export->exp_connection->c_peer.nid,
1342 &export->exp_nid_hash);
1344 lustre_msg_set_handle(req->rq_repmsg, &conn);
1346 rc = rev_import_reconnect(export, req);
1350 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1352 __u64 transno = data->ocd_transno;
1354 spin_lock(&export->exp_lock);
1355 /* possible race with class_disconnect_stale_exports,
1356 * export may be already in the eviction process */
1357 if (export->exp_failed) {
1358 spin_unlock(&export->exp_lock);
1359 GOTO(out, rc = -ENODEV);
1361 export->exp_in_recovery = 1;
1362 export->exp_req_replay_needed = 1;
1363 export->exp_lock_replay_needed = 1;
1364 spin_unlock(&export->exp_lock);
1366 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1367 MSG_CONNECT_TRANSNO);
1368 if (has_transno && transno == 0)
1369 CWARN("Connect with zero transno!\n");
1371 if (has_transno && transno > 0 &&
1372 transno < target->obd_next_recovery_transno &&
1373 transno > target->obd_last_committed) {
1374 /* Another way is to use cmpxchg() to be lock-free. */
1375 spin_lock(&target->obd_recovery_task_lock);
1376 if (transno < target->obd_next_recovery_transno)
1377 target->obd_next_recovery_transno = transno;
1378 spin_unlock(&target->obd_recovery_task_lock);
1381 atomic_inc(&target->obd_req_replay_clients);
1382 atomic_inc(&target->obd_lock_replay_clients);
1383 /* Note: MDS-MDS connection is allowed to be connected during
1384 * recovery, no matter if the exports needs to be recoveried.
1385 * Because we need retrieve updates logs from all other MDTs.
1386 * So if the MDS-MDS export is new, obd_max_recoverable_clients
1387 * also needs to be increased to match other recovery checking
1389 if (new_mds_mds_conn)
1390 target->obd_max_recoverable_clients++;
1391 if (atomic_inc_return(&target->obd_connected_clients) ==
1392 target->obd_max_recoverable_clients)
1393 wake_up(&target->obd_next_transno_waitq);
1396 /* Tell the client we're in recovery, when client is involved in it. */
1397 if (target->obd_recovering && !lw_client)
1398 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1402 spin_lock(&export->exp_lock);
1403 export->exp_connecting = 0;
1404 spin_unlock(&export->exp_lock);
1406 class_export_put(export);
1408 if (target != NULL) {
1409 spin_lock(&target->obd_dev_lock);
1410 target->obd_conn_inprogress--;
1411 spin_unlock(&target->obd_dev_lock);
1412 class_decref(target, "find", current);
1414 req->rq_status = rc;
1418 int target_handle_disconnect(struct ptlrpc_request *req)
1423 rc = req_capsule_server_pack(&req->rq_pill);
1427 /* Keep the rq_export around so we can send the reply. */
1428 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1433 void target_destroy_export(struct obd_export *exp)
1435 struct obd_import *imp = NULL;
1436 /* exports created from last_rcvd data, and "fake"
1437 exports created by lctl don't have an import */
1438 spin_lock(&exp->exp_lock);
1439 if (exp->exp_imp_reverse != NULL) {
1440 imp = exp->exp_imp_reverse;
1441 exp->exp_imp_reverse = NULL;
1443 spin_unlock(&exp->exp_lock);
1445 client_destroy_import(imp);
1447 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1448 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1449 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1450 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1452 EXPORT_SYMBOL(target_destroy_export);
1455 * Recovery functions
1457 static void target_request_copy_get(struct ptlrpc_request *req)
1459 class_export_rpc_inc(req->rq_export);
1460 LASSERT(list_empty(&req->rq_list));
1461 INIT_LIST_HEAD(&req->rq_replay_list);
1463 /* Increase refcount to keep request in queue. */
1464 atomic_inc(&req->rq_refcount);
1465 /* Let export know it has replays to be handled. */
1466 atomic_inc(&req->rq_export->exp_replay_count);
1469 static void target_request_copy_put(struct ptlrpc_request *req)
1471 LASSERT(list_empty(&req->rq_replay_list));
1472 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1474 atomic_dec(&req->rq_export->exp_replay_count);
1475 class_export_rpc_dec(req->rq_export);
1476 ptlrpc_server_drop_request(req);
1479 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1481 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1482 struct obd_export *exp = req->rq_export;
1483 struct ptlrpc_request *reqiter;
1484 struct ptlrpc_request *dup_req = NULL;
1489 spin_lock(&exp->exp_lock);
1490 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1492 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1500 /* We expect it with RESENT and REPLAY flags. */
1501 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1502 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1503 CERROR("invalid flags %x of resent replay\n",
1504 lustre_msg_get_flags(req->rq_reqmsg));
1506 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1509 new_conn = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1511 lustre_msg_get_conn_cnt(dup_req->rq_reqmsg))
1512 lustre_msg_set_conn_cnt(dup_req->rq_reqmsg,
1516 list_add_tail(&req->rq_replay_list,
1517 &exp->exp_req_replay_queue);
1520 spin_unlock(&exp->exp_lock);
1524 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1526 LASSERT(!list_empty(&req->rq_replay_list));
1527 LASSERT(req->rq_export);
1529 spin_lock(&req->rq_export->exp_lock);
1530 list_del_init(&req->rq_replay_list);
1531 spin_unlock(&req->rq_export->exp_lock);
1534 static void target_finish_recovery(struct lu_target *lut)
1536 struct obd_device *obd = lut->lut_obd;
1539 /* Only log a recovery message when recovery has occurred. */
1540 if (obd->obd_recovery_start) {
1541 time64_t now = ktime_get_real_seconds();
1542 time64_t elapsed_time;
1544 elapsed_time = max_t(time64_t, now - obd->obd_recovery_start, 1);
1545 LCONSOLE_INFO("%s: Recovery over after %lld:%.02lld, of %d clients "
1546 "%d recovered and %d %s evicted.\n", obd->obd_name,
1547 (s64)elapsed_time / 60, (s64)elapsed_time % 60,
1548 obd->obd_max_recoverable_clients,
1549 atomic_read(&obd->obd_connected_clients),
1550 obd->obd_stale_clients,
1551 obd->obd_stale_clients == 1 ? "was" : "were");
1554 ldlm_reprocess_recovery_done(obd->obd_namespace);
1555 spin_lock(&obd->obd_recovery_task_lock);
1556 if (!list_empty(&obd->obd_req_replay_queue) ||
1557 !list_empty(&obd->obd_lock_replay_queue) ||
1558 !list_empty(&obd->obd_final_req_queue)) {
1559 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1561 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1562 list_empty(&obd->obd_lock_replay_queue) ? \
1564 list_empty(&obd->obd_final_req_queue) ? \
1566 spin_unlock(&obd->obd_recovery_task_lock);
1569 spin_unlock(&obd->obd_recovery_task_lock);
1571 obd->obd_recovery_end = ktime_get_real_seconds();
1573 /* When recovery finished, cleanup orphans on MDS and OST. */
1574 if (OBT(obd) && OBP(obd, postrecov)) {
1575 int rc = OBP(obd, postrecov)(obd);
1577 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1583 static void abort_req_replay_queue(struct obd_device *obd)
1585 struct ptlrpc_request *req, *n;
1586 struct list_head abort_list;
1588 INIT_LIST_HEAD(&abort_list);
1589 spin_lock(&obd->obd_recovery_task_lock);
1590 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1591 spin_unlock(&obd->obd_recovery_task_lock);
1592 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1593 DEBUG_REQ(D_WARNING, req, "aborted:");
1594 req->rq_status = -ENOTCONN;
1595 if (ptlrpc_error(req)) {
1596 DEBUG_REQ(D_ERROR, req,
1597 "failed abort_req_reply; skipping");
1599 target_exp_dequeue_req_replay(req);
1600 target_request_copy_put(req);
1604 static void abort_lock_replay_queue(struct obd_device *obd)
1606 struct ptlrpc_request *req, *n;
1607 struct list_head abort_list;
1609 INIT_LIST_HEAD(&abort_list);
1610 spin_lock(&obd->obd_recovery_task_lock);
1611 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1612 spin_unlock(&obd->obd_recovery_task_lock);
1613 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1614 DEBUG_REQ(D_ERROR, req, "aborted:");
1615 req->rq_status = -ENOTCONN;
1616 if (ptlrpc_error(req)) {
1617 DEBUG_REQ(D_ERROR, req,
1618 "failed abort_lock_reply; skipping");
1620 target_request_copy_put(req);
1624 /* Called from a cleanup function if the device is being cleaned up
1625 forcefully. The exports should all have been disconnected already,
1626 the only thing left to do is
1627 - clear the recovery flags
1629 - free queued requests and replies, but don't send replies
1630 Because the obd_stopping flag is set, no new requests should be received.
1633 void target_cleanup_recovery(struct obd_device *obd)
1635 struct ptlrpc_request *req, *n;
1636 struct list_head clean_list;
1638 INIT_LIST_HEAD(&clean_list);
1639 spin_lock(&obd->obd_dev_lock);
1640 if (!obd->obd_recovering) {
1641 spin_unlock(&obd->obd_dev_lock);
1645 obd->obd_recovering = obd->obd_abort_recovery = 0;
1646 spin_unlock(&obd->obd_dev_lock);
1648 spin_lock(&obd->obd_recovery_task_lock);
1649 target_cancel_recovery_timer(obd);
1650 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1651 spin_unlock(&obd->obd_recovery_task_lock);
1653 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1654 LASSERT(req->rq_reply_state == NULL);
1655 target_exp_dequeue_req_replay(req);
1656 target_request_copy_put(req);
1659 spin_lock(&obd->obd_recovery_task_lock);
1660 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1661 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1662 spin_unlock(&obd->obd_recovery_task_lock);
1664 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1665 LASSERT(req->rq_reply_state == NULL);
1666 target_request_copy_put(req);
1671 EXPORT_SYMBOL(target_cleanup_recovery);
1673 /* obd_recovery_task_lock should be held */
1674 void target_cancel_recovery_timer(struct obd_device *obd)
1676 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1677 del_timer(&obd->obd_recovery_timer);
1680 static void target_start_recovery_timer(struct obd_device *obd)
1682 if (obd->obd_recovery_start != 0)
1685 spin_lock(&obd->obd_dev_lock);
1686 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1687 spin_unlock(&obd->obd_dev_lock);
1691 LASSERT(obd->obd_recovery_timeout != 0);
1693 if (obd->obd_recovery_start != 0) {
1694 spin_unlock(&obd->obd_dev_lock);
1698 mod_timer(&obd->obd_recovery_timer,
1699 jiffies + cfs_time_seconds(obd->obd_recovery_timeout));
1700 obd->obd_recovery_start = ktime_get_real_seconds();
1701 spin_unlock(&obd->obd_dev_lock);
1703 LCONSOLE_WARN("%s: Will be in recovery for at least %llu:%02llu, or until %d client%s reconnect%s\n",
1705 obd->obd_recovery_timeout / 60,
1706 obd->obd_recovery_timeout % 60,
1707 obd->obd_max_recoverable_clients,
1708 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1709 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1713 * extend recovery window.
1715 * if @extend is true, extend recovery window to have @drt remaining at least;
1716 * otherwise, make sure the recovery timeout value is not less than @drt.
1718 static void extend_recovery_timer(struct obd_device *obd, time64_t drt,
1726 spin_lock(&obd->obd_dev_lock);
1727 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1728 spin_unlock(&obd->obd_dev_lock);
1731 LASSERT(obd->obd_recovery_start != 0);
1733 now = ktime_get_real_seconds();
1734 to = obd->obd_recovery_timeout;
1735 end = obd->obd_recovery_start + to;
1738 if (extend && (drt > left)) {
1740 } else if (!extend && (drt > to)) {
1744 if (to > obd->obd_recovery_time_hard) {
1745 to = obd->obd_recovery_time_hard;
1746 CWARN("%s: extended recovery timer reaching hard limit: %lld, extend: %d\n",
1747 obd->obd_name, to, extend);
1750 if (obd->obd_recovery_timeout < to) {
1751 obd->obd_recovery_timeout = to;
1752 end = obd->obd_recovery_start + to;
1753 mod_timer(&obd->obd_recovery_timer,
1754 jiffies + cfs_time_seconds(end - now));
1756 spin_unlock(&obd->obd_dev_lock);
1758 CDEBUG(D_HA, "%s: recovery timer will expire in %lld seconds\n",
1759 obd->obd_name, (s64)(end - now));
1762 /* Reset the timer with each new client connection */
1764 * This timer is actually reconnect_timer, which is for making sure
1765 * the total recovery window is at least as big as my reconnect
1766 * attempt timing. So the initial recovery time_out will be set to
1767 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1768 * from client is bigger than this, then the recovery time_out will
1769 * be extended to make sure the client could be reconnected, in the
1770 * process, the timeout from the new client should be ignored.
1774 check_and_start_recovery_timer(struct obd_device *obd,
1775 struct ptlrpc_request *req,
1778 time64_t service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1779 struct obd_device_target *obt = &obd->u.obt;
1781 if (!new_client && service_time)
1782 /* Teach server about old server's estimates, as first guess
1783 * at how long new requests will take. */
1784 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1787 target_start_recovery_timer(obd);
1789 /* Convert the service time to RPC timeout,
1790 * and reuse service_time to limit stack usage.
1792 service_time = at_est2timeout(service_time);
1794 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_SLUGGISH_NET) &&
1795 service_time < at_extra)
1796 service_time = at_extra;
1798 /* We expect other clients to timeout within service_time, then try
1799 * to reconnect, then try the failover server. The max delay between
1800 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1801 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1803 LASSERT(obt->obt_magic == OBT_MAGIC);
1804 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1805 if (service_time > obd->obd_recovery_timeout && !new_client)
1806 extend_recovery_timer(obd, service_time, false);
1809 /** Health checking routines */
1810 static inline int exp_connect_healthy(struct obd_export *exp)
1812 return (exp->exp_in_recovery);
1815 /** if export done req_replay or has replay in queue */
1816 static inline int exp_req_replay_healthy(struct obd_export *exp)
1818 return (!exp->exp_req_replay_needed ||
1819 atomic_read(&exp->exp_replay_count) > 0);
1823 static inline int exp_req_replay_healthy_or_from_mdt(struct obd_export *exp)
1825 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1826 exp_req_replay_healthy(exp);
1829 /** if export done lock_replay or has replay in queue */
1830 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1832 return (!exp->exp_lock_replay_needed ||
1833 atomic_read(&exp->exp_replay_count) > 0);
1836 static inline int exp_vbr_healthy(struct obd_export *exp)
1838 return (!exp->exp_vbr_failed);
1841 static inline int exp_finished(struct obd_export *exp)
1843 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1846 static inline int exp_finished_or_from_mdt(struct obd_export *exp)
1848 return (exp_connect_flags(exp) & OBD_CONNECT_MDS_MDS) ||
1852 static int check_for_next_transno(struct lu_target *lut)
1854 struct ptlrpc_request *req = NULL;
1855 struct obd_device *obd = lut->lut_obd;
1856 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
1857 int wake_up = 0, connected, completed, queue_len;
1858 __u64 req_transno = 0;
1859 __u64 update_transno = 0;
1860 __u64 next_transno = 0;
1863 spin_lock(&obd->obd_recovery_task_lock);
1864 if (!list_empty(&obd->obd_req_replay_queue)) {
1865 req = list_entry(obd->obd_req_replay_queue.next,
1866 struct ptlrpc_request, rq_list);
1867 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1871 update_transno = distribute_txn_get_next_transno(tdtd);
1873 connected = atomic_read(&obd->obd_connected_clients);
1874 completed = connected - atomic_read(&obd->obd_req_replay_clients);
1875 queue_len = obd->obd_requests_queued_for_recovery;
1876 next_transno = obd->obd_next_recovery_transno;
1878 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1879 "req_transno: %llu, next_transno: %llu\n",
1880 obd->obd_max_recoverable_clients, connected, completed,
1881 queue_len, req_transno, next_transno);
1883 if (obd->obd_abort_recovery) {
1884 CDEBUG(D_HA, "waking for aborted recovery\n");
1886 } else if (obd->obd_recovery_expired) {
1887 CDEBUG(D_HA, "waking for expired recovery\n");
1889 } else if (tdtd != NULL && req != NULL &&
1890 is_req_replayed_by_update(req)) {
1891 LASSERTF(req_transno < next_transno, "req_transno %llu"
1892 "next_transno%llu\n", req_transno, next_transno);
1893 CDEBUG(D_HA, "waking for duplicate req (%llu)\n",
1896 } else if (req_transno == next_transno ||
1897 (update_transno != 0 && update_transno <= next_transno)) {
1898 CDEBUG(D_HA, "waking for next (%lld)\n", next_transno);
1900 } else if (queue_len > 0 &&
1901 queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1902 /** handle gaps occured due to lost reply or VBR */
1903 LASSERTF(req_transno >= next_transno,
1904 "req_transno: %llu, next_transno: %llu\n",
1905 req_transno, next_transno);
1907 "%s: waking for gap in transno, VBR is %s (skip: "
1908 "%lld, ql: %d, comp: %d, conn: %d, next: %lld"
1909 ", next_update %lld last_committed: %lld)\n",
1910 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1911 next_transno, queue_len, completed, connected,
1912 req_transno, update_transno, obd->obd_last_committed);
1913 obd->obd_next_recovery_transno = req_transno;
1915 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1916 CDEBUG(D_HA, "waking for completed recovery\n");
1918 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1919 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1920 " by fail_lock, waking up (%lld)\n", next_transno);
1921 obd->obd_next_recovery_transno = req_transno;
1924 spin_unlock(&obd->obd_recovery_task_lock);
1928 static int check_for_next_lock(struct lu_target *lut)
1930 struct obd_device *obd = lut->lut_obd;
1933 spin_lock(&obd->obd_recovery_task_lock);
1934 if (!list_empty(&obd->obd_lock_replay_queue)) {
1935 CDEBUG(D_HA, "waking for next lock\n");
1937 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1938 CDEBUG(D_HA, "waking for completed lock replay\n");
1940 } else if (obd->obd_abort_recovery) {
1941 CDEBUG(D_HA, "waking for aborted recovery\n");
1943 } else if (obd->obd_recovery_expired) {
1944 CDEBUG(D_HA, "waking for expired recovery\n");
1947 spin_unlock(&obd->obd_recovery_task_lock);
1953 * wait for recovery events,
1954 * check its status with help of check_routine
1955 * evict dead clients via health_check
1957 static int target_recovery_overseer(struct lu_target *lut,
1958 int (*check_routine)(struct lu_target *),
1959 int (*health_check)(struct obd_export *))
1961 struct obd_device *obd = lut->lut_obd;
1962 struct target_distribute_txn_data *tdtd;
1964 if (obd->obd_recovery_start != 0 && ktime_get_real_seconds() >=
1965 (obd->obd_recovery_start + obd->obd_recovery_time_hard)) {
1966 __u64 next_update_transno = 0;
1968 /* Only abort the recovery if there are no update recovery
1969 * left in the queue */
1970 spin_lock(&obd->obd_recovery_task_lock);
1971 if (lut->lut_tdtd != NULL) {
1972 next_update_transno =
1973 distribute_txn_get_next_transno(lut->lut_tdtd);
1975 tdtd = lut->lut_tdtd;
1976 /* If next_update_transno == 0, it probably because
1977 * updatelog retrieve threads did not get any records
1978 * yet, let's wait those threads stopped */
1979 if (next_update_transno == 0) {
1980 struct l_wait_info lwi = { 0 };
1982 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
1984 &tdtd->tdtd_recovery_threads_count) == 0,
1987 next_update_transno =
1988 distribute_txn_get_next_transno(
1993 if (next_update_transno != 0 && !obd->obd_abort_recovery) {
1994 obd->obd_next_recovery_transno = next_update_transno;
1995 spin_unlock(&obd->obd_recovery_task_lock);
1996 /* Disconnect unfinished exports from clients, and
1997 * keep connection from MDT to make sure the update
1998 * recovery will still keep trying until some one
1999 * manually abort the recovery */
2000 class_disconnect_stale_exports(obd,
2001 exp_finished_or_from_mdt);
2002 /* Abort all of replay and replay lock req from
2004 abort_req_replay_queue(obd);
2005 abort_lock_replay_queue(obd);
2006 CDEBUG(D_HA, "%s: there are still update replay (%#llx"
2007 ")in the queue.\n", obd->obd_name,
2008 next_update_transno);
2010 obd->obd_abort_recovery = 1;
2011 spin_unlock(&obd->obd_recovery_task_lock);
2012 CWARN("%s recovery is aborted by hard timeout\n",
2017 while (wait_event_timeout(obd->obd_next_transno_waitq,
2019 msecs_to_jiffies(60 * MSEC_PER_SEC)) == 0)
2020 /* wait indefinitely for event, but don't trigger watchdog */;
2022 if (obd->obd_abort_recovery) {
2023 CWARN("recovery is aborted, evict exports in recovery\n");
2024 if (lut->lut_tdtd != NULL) {
2025 struct l_wait_info lwi = { 0 };
2027 tdtd = lut->lut_tdtd;
2028 /* Let's wait all of the update log recovery thread
2030 l_wait_event(tdtd->tdtd_recovery_threads_waitq,
2031 atomic_read(&tdtd->tdtd_recovery_threads_count) == 0,
2033 /* Then abort the update recovery list */
2034 dtrq_list_destroy(lut->lut_tdtd);
2037 /** evict exports which didn't finish recovery yet */
2038 class_disconnect_stale_exports(obd, exp_finished);
2040 } else if (obd->obd_recovery_expired) {
2041 obd->obd_recovery_expired = 0;
2042 /** If some clients died being recovered, evict them */
2043 LCONSOLE_WARN("%s: recovery is timed out, "
2044 "evict stale exports\n", obd->obd_name);
2045 /** evict cexports with no replay in queue, they are stalled */
2046 class_disconnect_stale_exports(obd, health_check);
2048 /** continue with VBR */
2049 spin_lock(&obd->obd_dev_lock);
2050 obd->obd_version_recov = 1;
2051 spin_unlock(&obd->obd_dev_lock);
2053 * reset timer, recovery will proceed with versions now,
2054 * timeout is set just to handle reconnection delays
2056 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
2057 /** Wait for recovery events again, after evicting bad clients */
2063 static struct ptlrpc_request *target_next_replay_lock(struct lu_target *lut)
2065 struct obd_device *obd = lut->lut_obd;
2066 struct ptlrpc_request *req = NULL;
2068 CDEBUG(D_HA, "Waiting for lock\n");
2069 if (target_recovery_overseer(lut, check_for_next_lock,
2070 exp_lock_replay_healthy))
2071 abort_lock_replay_queue(obd);
2073 spin_lock(&obd->obd_recovery_task_lock);
2074 if (!list_empty(&obd->obd_lock_replay_queue)) {
2075 req = list_entry(obd->obd_lock_replay_queue.next,
2076 struct ptlrpc_request, rq_list);
2077 list_del_init(&req->rq_list);
2078 spin_unlock(&obd->obd_recovery_task_lock);
2080 spin_unlock(&obd->obd_recovery_task_lock);
2081 LASSERT(list_empty(&obd->obd_lock_replay_queue));
2082 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
2083 /** evict exports failed VBR */
2084 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2089 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
2091 struct ptlrpc_request *req = NULL;
2093 spin_lock(&obd->obd_recovery_task_lock);
2094 if (!list_empty(&obd->obd_final_req_queue)) {
2095 req = list_entry(obd->obd_final_req_queue.next,
2096 struct ptlrpc_request, rq_list);
2097 list_del_init(&req->rq_list);
2098 spin_unlock(&obd->obd_recovery_task_lock);
2099 if (req->rq_export->exp_in_recovery) {
2100 spin_lock(&req->rq_export->exp_lock);
2101 req->rq_export->exp_in_recovery = 0;
2102 spin_unlock(&req->rq_export->exp_lock);
2105 spin_unlock(&obd->obd_recovery_task_lock);
2110 static void handle_recovery_req(struct ptlrpc_thread *thread,
2111 struct ptlrpc_request *req,
2112 svc_handler_t handler)
2117 * export can be evicted during recovery, no need to handle replays for
2118 * it after that, discard such request silently
2120 if (req->rq_export->exp_disconnected)
2123 req->rq_session.lc_thread = thread;
2124 req->rq_svc_thread = thread;
2125 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
2127 /* thread context */
2128 lu_context_enter(&thread->t_env->le_ctx);
2130 lu_context_exit(&thread->t_env->le_ctx);
2132 /* don't reset timer for final stage */
2133 if (!exp_finished(req->rq_export)) {
2134 time64_t to = obd_timeout;
2137 * Add request timeout to the recovery time so next request from
2138 * this client may come in recovery time
2141 struct ptlrpc_service_part *svcpt;
2143 svcpt = req->rq_rqbd->rqbd_svcpt;
2144 /* If the server sent early reply for this request,
2145 * the client will recalculate the timeout according to
2146 * current server estimate service time, so we will
2147 * use the maxium timeout here for waiting the client
2148 * sending the next req */
2149 to = max((int)at_est2timeout(
2150 at_get(&svcpt->scp_at_estimate)),
2151 (int)lustre_msg_get_timeout(req->rq_reqmsg));
2152 /* Add 2 net_latency, one for balance rq_deadline
2153 * (see ptl_send_rpc), one for resend the req to server,
2154 * Note: client will pack net_latency in replay req
2155 * (see ptlrpc_replay_req) */
2156 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
2158 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
2163 /** Checking routines for recovery */
2164 static int check_for_recovery_ready(struct lu_target *lut)
2166 struct obd_device *obd = lut->lut_obd;
2167 unsigned int clnts = atomic_read(&obd->obd_connected_clients);
2169 CDEBUG(D_HA, "connected %d stale %d max_recoverable_clients %d"
2170 " abort %d expired %d\n", clnts, obd->obd_stale_clients,
2171 obd->obd_max_recoverable_clients, obd->obd_abort_recovery,
2172 obd->obd_recovery_expired);
2174 if (!obd->obd_abort_recovery && !obd->obd_recovery_expired) {
2175 LASSERT(clnts <= obd->obd_max_recoverable_clients);
2176 if (clnts + obd->obd_stale_clients <
2177 obd->obd_max_recoverable_clients)
2181 if (lut->lut_tdtd != NULL) {
2182 if (!lut->lut_tdtd->tdtd_replay_ready &&
2183 !obd->obd_abort_recovery) {
2184 /* Let's extend recovery timer, in case the recovery
2185 * timer expired, and some clients got evicted */
2186 extend_recovery_timer(obd, obd->obd_recovery_timeout,
2188 CDEBUG(D_HA, "%s update recovery is not ready, extend recovery %llu\n",
2189 obd->obd_name, obd->obd_recovery_timeout);
2198 REQUEST_RECOVERY = 1,
2199 UPDATE_RECOVERY = 2,
2202 static __u64 get_next_replay_req_transno(struct obd_device *obd)
2206 if (!list_empty(&obd->obd_req_replay_queue)) {
2207 struct ptlrpc_request *req;
2209 req = list_entry(obd->obd_req_replay_queue.next,
2210 struct ptlrpc_request, rq_list);
2211 transno = lustre_msg_get_transno(req->rq_reqmsg);
2217 static __u64 get_next_transno(struct lu_target *lut, int *type)
2219 struct obd_device *obd = lut->lut_obd;
2220 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2222 __u64 update_transno;
2225 transno = get_next_replay_req_transno(obd);
2227 *type = REQUEST_RECOVERY;
2232 update_transno = distribute_txn_get_next_transno(tdtd);
2233 if (transno == 0 || (transno >= update_transno &&
2234 update_transno != 0)) {
2235 transno = update_transno;
2237 *type = UPDATE_RECOVERY;
2244 * drop duplicate replay request
2246 * Because the operation has been replayed by update recovery, the request
2247 * with the same transno will be dropped and also notify the client to send
2248 * next replay request.
2250 * \param[in] env execution environment
2251 * \param[in] obd failover obd device
2252 * \param[in] req request to be dropped
2254 static void drop_duplicate_replay_req(struct lu_env *env,
2255 struct obd_device *obd,
2256 struct ptlrpc_request *req)
2258 DEBUG_REQ(D_HA, req, "remove t%lld from %s because of duplicate"
2259 " update records are found.\n",
2260 lustre_msg_get_transno(req->rq_reqmsg),
2261 libcfs_nid2str(req->rq_peer.nid));
2263 /* Right now, only for MDS reint operation update replay and
2264 * normal request replay can have the same transno */
2265 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT) {
2266 req_capsule_set(&req->rq_pill, &RQF_MDS_REINT);
2267 req->rq_status = req_capsule_server_pack(&req->rq_pill);
2268 if (likely(req->rq_export))
2269 target_committed_to_req(req);
2270 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
2271 target_send_reply(req, req->rq_status, 0);
2273 DEBUG_REQ(D_ERROR, req, "wrong opc" "from %s\n",
2274 libcfs_nid2str(req->rq_peer.nid));
2276 target_exp_dequeue_req_replay(req);
2277 target_request_copy_put(req);
2278 obd->obd_replayed_requests++;
2281 static void replay_request_or_update(struct lu_env *env,
2282 struct lu_target *lut,
2283 struct target_recovery_data *trd,
2284 struct ptlrpc_thread *thread)
2286 struct obd_device *obd = lut->lut_obd;
2287 struct ptlrpc_request *req = NULL;
2292 CDEBUG(D_HA, "Waiting for transno %lld\n",
2293 obd->obd_next_recovery_transno);
2295 /* Replay all of request and update by transno */
2297 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2299 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_DELAY2, cfs_fail_val);
2301 /** It is needed to extend recovery window above
2302 * recovery_time_soft. Extending is possible only in the
2303 * end of recovery window (see more details in
2304 * handle_recovery_req()).
2306 CFS_FAIL_TIMEOUT_MS(OBD_FAIL_TGT_REPLAY_DELAY, 300);
2308 if (target_recovery_overseer(lut, check_for_next_transno,
2309 exp_req_replay_healthy_or_from_mdt)) {
2310 abort_req_replay_queue(obd);
2311 abort_lock_replay_queue(obd);
2315 spin_lock(&obd->obd_recovery_task_lock);
2316 transno = get_next_transno(lut, &type);
2317 if (type == REQUEST_RECOVERY && transno != 0) {
2318 /* Drop replay request from client side, if the
2319 * replay has been executed by update with the
2321 req = list_entry(obd->obd_req_replay_queue.next,
2322 struct ptlrpc_request, rq_list);
2324 list_del_init(&req->rq_list);
2325 obd->obd_requests_queued_for_recovery--;
2326 spin_unlock(&obd->obd_recovery_task_lock);
2328 /* Let's check if the request has been redone by
2330 if (is_req_replayed_by_update(req)) {
2331 struct distribute_txn_replay_req *dtrq;
2333 dtrq = distribute_txn_lookup_finish_list(tdtd,
2335 LASSERT(dtrq != NULL);
2336 spin_lock(&tdtd->tdtd_replay_list_lock);
2337 list_del_init(&dtrq->dtrq_list);
2338 spin_unlock(&tdtd->tdtd_replay_list_lock);
2341 drop_duplicate_replay_req(env, obd, req);
2346 LASSERT(trd->trd_processing_task == current_pid());
2347 DEBUG_REQ(D_HA, req, "processing t%lld from %s",
2348 lustre_msg_get_transno(req->rq_reqmsg),
2349 libcfs_nid2str(req->rq_peer.nid));
2351 handle_recovery_req(thread, req,
2352 trd->trd_recovery_handler);
2354 * bz18031: increase next_recovery_transno before
2355 * target_request_copy_put() will drop exp_rpc reference
2357 spin_lock(&obd->obd_recovery_task_lock);
2358 obd->obd_next_recovery_transno++;
2359 spin_unlock(&obd->obd_recovery_task_lock);
2360 target_exp_dequeue_req_replay(req);
2361 target_request_copy_put(req);
2362 obd->obd_replayed_requests++;
2363 } else if (type == UPDATE_RECOVERY && transno != 0) {
2364 struct distribute_txn_replay_req *dtrq;
2367 spin_unlock(&obd->obd_recovery_task_lock);
2369 LASSERT(tdtd != NULL);
2370 dtrq = distribute_txn_get_next_req(tdtd);
2371 lu_context_enter(&thread->t_env->le_ctx);
2372 rc = tdtd->tdtd_replay_handler(env, tdtd, dtrq);
2373 lu_context_exit(&thread->t_env->le_ctx);
2374 extend_recovery_timer(obd, obd_timeout, true);
2376 if (rc == 0 && dtrq->dtrq_xid != 0) {
2377 CDEBUG(D_HA, "Move x%llu t%llu"
2378 " to finish list\n", dtrq->dtrq_xid,
2379 dtrq->dtrq_master_transno);
2381 /* Add it to the replay finish list */
2382 spin_lock(&tdtd->tdtd_replay_list_lock);
2383 list_add(&dtrq->dtrq_list,
2384 &tdtd->tdtd_replay_finish_list);
2385 spin_unlock(&tdtd->tdtd_replay_list_lock);
2387 spin_lock(&obd->obd_recovery_task_lock);
2388 if (transno == obd->obd_next_recovery_transno)
2389 obd->obd_next_recovery_transno++;
2391 obd->obd_next_recovery_transno)
2392 obd->obd_next_recovery_transno =
2394 spin_unlock(&obd->obd_recovery_task_lock);
2399 spin_unlock(&obd->obd_recovery_task_lock);
2401 LASSERT(list_empty(&obd->obd_req_replay_queue));
2402 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
2403 /** evict exports failed VBR */
2404 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2410 static int target_recovery_thread(void *arg)
2412 struct lu_target *lut = arg;
2413 struct obd_device *obd = lut->lut_obd;
2414 struct ptlrpc_request *req;
2415 struct target_recovery_data *trd = &obd->obd_recovery_data;
2416 unsigned long delta;
2418 struct ptlrpc_thread *thread = NULL;
2422 unshare_fs_struct();
2423 OBD_ALLOC_PTR(thread);
2429 OBD_FREE_PTR(thread);
2433 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
2435 OBD_FREE_PTR(thread);
2440 thread->t_env = env;
2441 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
2442 env->le_ctx.lc_thread = thread;
2443 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
2444 thread->t_watchdog = NULL;
2446 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2448 trd->trd_processing_task = current_pid();
2450 spin_lock(&obd->obd_dev_lock);
2451 obd->obd_recovering = 1;
2452 spin_unlock(&obd->obd_dev_lock);
2453 complete(&trd->trd_starting);
2455 /* first of all, we have to know the first transno to replay */
2456 if (target_recovery_overseer(lut, check_for_recovery_ready,
2457 exp_connect_healthy)) {
2458 abort_req_replay_queue(obd);
2459 abort_lock_replay_queue(obd);
2460 if (lut->lut_tdtd != NULL)
2461 dtrq_list_destroy(lut->lut_tdtd);
2464 /* next stage: replay requests or update */
2466 CDEBUG(D_INFO, "1: request replay stage - %d clients from t%llu\n",
2467 atomic_read(&obd->obd_req_replay_clients),
2468 obd->obd_next_recovery_transno);
2469 replay_request_or_update(env, lut, trd, thread);
2472 * The second stage: replay locks
2474 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2475 atomic_read(&obd->obd_lock_replay_clients));
2476 while ((req = target_next_replay_lock(lut))) {
2477 LASSERT(trd->trd_processing_task == current_pid());
2478 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2479 libcfs_nid2str(req->rq_peer.nid));
2480 handle_recovery_req(thread, req,
2481 trd->trd_recovery_handler);
2482 target_request_copy_put(req);
2483 obd->obd_replayed_locks++;
2487 * The third stage: reply on final pings, at this moment all clients
2488 * must have request in final queue
2490 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_RECONNECT, cfs_fail_val);
2491 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2492 /** Update server last boot epoch */
2493 tgt_boot_epoch_update(lut);
2494 /* We drop recoverying flag to forward all new requests
2495 * to regular mds_handle() since now */
2496 spin_lock(&obd->obd_dev_lock);
2497 obd->obd_recovering = obd->obd_abort_recovery = 0;
2498 spin_unlock(&obd->obd_dev_lock);
2499 spin_lock(&obd->obd_recovery_task_lock);
2500 target_cancel_recovery_timer(obd);
2501 spin_unlock(&obd->obd_recovery_task_lock);
2502 while ((req = target_next_final_ping(obd))) {
2503 LASSERT(trd->trd_processing_task == current_pid());
2504 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2505 libcfs_nid2str(req->rq_peer.nid));
2506 handle_recovery_req(thread, req,
2507 trd->trd_recovery_handler);
2508 /* Because the waiting client can not send ping to server,
2509 * so we need refresh the last_request_time, to avoid the
2510 * export is being evicted */
2511 ptlrpc_update_export_timer(req->rq_export, 0);
2512 target_request_copy_put(req);
2515 delta = jiffies_to_msecs(jiffies - delta) / MSEC_PER_SEC;
2516 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2517 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2518 if (delta > OBD_RECOVERY_TIME_SOFT) {
2519 CWARN("too long recovery - read logs\n");
2520 libcfs_debug_dumplog();
2523 target_finish_recovery(lut);
2525 lu_context_fini(&env->le_ctx);
2526 trd->trd_processing_task = 0;
2527 complete(&trd->trd_finishing);
2529 tgt_io_thread_done(thread);
2530 OBD_FREE_PTR(thread);
2535 static int target_start_recovery_thread(struct lu_target *lut,
2536 svc_handler_t handler)
2538 struct obd_device *obd = lut->lut_obd;
2540 struct target_recovery_data *trd = &obd->obd_recovery_data;
2543 memset(trd, 0, sizeof(*trd));
2544 init_completion(&trd->trd_starting);
2545 init_completion(&trd->trd_finishing);
2546 trd->trd_recovery_handler = handler;
2548 rc = server_name2index(obd->obd_name, &index, NULL);
2552 if (!IS_ERR(kthread_run(target_recovery_thread,
2553 lut, "tgt_recover_%d", index))) {
2554 wait_for_completion(&trd->trd_starting);
2555 LASSERT(obd->obd_recovering != 0);
2563 void target_stop_recovery_thread(struct obd_device *obd)
2565 if (obd->obd_recovery_data.trd_processing_task > 0) {
2566 struct target_recovery_data *trd = &obd->obd_recovery_data;
2567 /** recovery can be done but postrecovery is not yet */
2568 spin_lock(&obd->obd_dev_lock);
2569 if (obd->obd_recovering) {
2570 CERROR("%s: Aborting recovery\n", obd->obd_name);
2571 obd->obd_abort_recovery = 1;
2572 wake_up(&obd->obd_next_transno_waitq);
2574 spin_unlock(&obd->obd_dev_lock);
2575 wait_for_completion(&trd->trd_finishing);
2578 EXPORT_SYMBOL(target_stop_recovery_thread);
2580 void target_recovery_fini(struct obd_device *obd)
2582 class_disconnect_exports(obd);
2583 target_stop_recovery_thread(obd);
2584 target_cleanup_recovery(obd);
2586 EXPORT_SYMBOL(target_recovery_fini);
2588 static void target_recovery_expired(unsigned long castmeharder)
2590 struct obd_device *obd = (struct obd_device *)castmeharder;
2591 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2592 " after %llus (%d clients connected)\n",
2593 obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
2594 (s64)(ktime_get_real_seconds() - obd->obd_recovery_start),
2595 atomic_read(&obd->obd_connected_clients));
2597 obd->obd_recovery_expired = 1;
2598 wake_up(&obd->obd_next_transno_waitq);
2601 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2603 struct obd_device *obd = lut->lut_obd;
2605 if (lut->lut_bottom->dd_rdonly)
2608 if (obd->obd_max_recoverable_clients == 0) {
2609 /** Update server last boot epoch */
2610 tgt_boot_epoch_update(lut);
2614 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2615 "last_transno %llu\n", obd->obd_name,
2616 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2617 LASSERT(obd->obd_stopping == 0);
2618 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2619 obd->obd_recovery_start = 0;
2620 obd->obd_recovery_end = 0;
2622 setup_timer(&obd->obd_recovery_timer, target_recovery_expired,
2623 (unsigned long)obd);
2624 target_start_recovery_thread(lut, handler);
2626 EXPORT_SYMBOL(target_recovery_init);
2628 static int target_process_req_flags(struct obd_device *obd,
2629 struct ptlrpc_request *req)
2631 struct obd_export *exp = req->rq_export;
2632 LASSERT(exp != NULL);
2633 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2634 /* client declares he's ready to replay locks */
2635 spin_lock(&exp->exp_lock);
2636 if (exp->exp_req_replay_needed) {
2637 exp->exp_req_replay_needed = 0;
2638 spin_unlock(&exp->exp_lock);
2640 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2641 atomic_dec(&obd->obd_req_replay_clients);
2643 spin_unlock(&exp->exp_lock);
2646 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2647 /* client declares he's ready to complete recovery
2648 * so, we put the request on th final queue */
2649 spin_lock(&exp->exp_lock);
2650 if (exp->exp_lock_replay_needed) {
2651 exp->exp_lock_replay_needed = 0;
2652 spin_unlock(&exp->exp_lock);
2654 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2655 atomic_dec(&obd->obd_lock_replay_clients);
2657 spin_unlock(&exp->exp_lock);
2663 int target_queue_recovery_request(struct ptlrpc_request *req,
2664 struct obd_device *obd)
2666 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2667 struct ptlrpc_request *reqiter;
2671 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2672 /* Processing the queue right now, don't re-add. */
2676 target_process_req_flags(obd, req);
2678 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2679 /* client declares he's ready to complete recovery
2680 * so, we put the request on th final queue */
2681 target_request_copy_get(req);
2682 DEBUG_REQ(D_HA, req, "queue final req");
2683 wake_up(&obd->obd_next_transno_waitq);
2684 spin_lock(&obd->obd_recovery_task_lock);
2685 if (obd->obd_recovering) {
2686 struct ptlrpc_request *tmp;
2687 struct ptlrpc_request *duplicate = NULL;
2689 if (likely(!req->rq_export->exp_replay_done)) {
2690 req->rq_export->exp_replay_done = 1;
2691 list_add_tail(&req->rq_list,
2692 &obd->obd_final_req_queue);
2693 spin_unlock(&obd->obd_recovery_task_lock);
2697 /* XXX O(n), but only happens if final ping is
2698 * timed out, probably reorganize the list as
2699 * a hash list later */
2700 list_for_each_entry_safe(reqiter, tmp,
2701 &obd->obd_final_req_queue,
2703 if (reqiter->rq_export == req->rq_export) {
2704 list_del_init(&reqiter->rq_list);
2705 duplicate = reqiter;
2710 list_add_tail(&req->rq_list,
2711 &obd->obd_final_req_queue);
2712 req->rq_export->exp_replay_done = 1;
2713 spin_unlock(&obd->obd_recovery_task_lock);
2715 if (duplicate != NULL) {
2716 DEBUG_REQ(D_HA, duplicate,
2717 "put prev final req\n");
2718 target_request_copy_put(duplicate);
2722 spin_unlock(&obd->obd_recovery_task_lock);
2723 target_request_copy_put(req);
2724 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2727 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2728 /* client declares he's ready to replay locks */
2729 target_request_copy_get(req);
2730 DEBUG_REQ(D_HA, req, "queue lock replay req");
2731 wake_up(&obd->obd_next_transno_waitq);
2732 spin_lock(&obd->obd_recovery_task_lock);
2733 LASSERT(obd->obd_recovering);
2734 /* usually due to recovery abort */
2735 if (!req->rq_export->exp_in_recovery) {
2736 spin_unlock(&obd->obd_recovery_task_lock);
2737 target_request_copy_put(req);
2740 LASSERT(req->rq_export->exp_lock_replay_needed);
2741 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2742 spin_unlock(&obd->obd_recovery_task_lock);
2746 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2747 * (i.e. buflens etc are in my own byte order), but type-dependent
2748 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2751 INIT_LIST_HEAD(&req->rq_list);
2752 DEBUG_REQ(D_HA, req, "not queueing");
2756 /* If we're processing the queue, we want don't want to queue this
2759 * Also, if this request has a transno less than the one we're waiting
2760 * for, we should process it now. It could (and currently always will)
2761 * be an open request for a descriptor that was opened some time ago.
2763 * Also, a resent, replayed request that has already been
2764 * handled will pass through here and be processed immediately.
2766 CDEBUG(D_HA, "Next recovery transno: %llu"
2767 ", current: %llu, replaying\n",
2768 obd->obd_next_recovery_transno, transno);
2770 /* If the request has been replayed by update replay, then sends this
2771 * request to the recovery thread (replay_request_or_update()), where
2772 * it will be handled */
2773 spin_lock(&obd->obd_recovery_task_lock);
2774 if (transno < obd->obd_next_recovery_transno &&
2775 !is_req_replayed_by_update(req)) {
2776 /* Processing the queue right now, don't re-add. */
2777 LASSERT(list_empty(&req->rq_list));
2778 spin_unlock(&obd->obd_recovery_task_lock);
2781 spin_unlock(&obd->obd_recovery_task_lock);
2783 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2786 target_request_copy_get(req);
2787 if (!req->rq_export->exp_in_recovery) {
2788 target_request_copy_put(req);
2791 LASSERT(req->rq_export->exp_req_replay_needed);
2793 if (target_exp_enqueue_req_replay(req)) {
2794 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2795 target_request_copy_put(req);
2800 spin_lock(&obd->obd_recovery_task_lock);
2801 LASSERT(obd->obd_recovering);
2802 list_for_each_entry(reqiter, &obd->obd_req_replay_queue, rq_list) {
2803 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2804 list_add_tail(&req->rq_list, &reqiter->rq_list);
2809 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2811 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2812 "has been claimed by another client");
2813 spin_unlock(&obd->obd_recovery_task_lock);
2814 target_exp_dequeue_req_replay(req);
2815 target_request_copy_put(req);
2821 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2823 obd->obd_requests_queued_for_recovery++;
2824 spin_unlock(&obd->obd_recovery_task_lock);
2825 wake_up(&obd->obd_next_transno_waitq);
2829 int target_handle_ping(struct ptlrpc_request *req)
2831 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2832 return req_capsule_server_pack(&req->rq_pill);
2835 void target_committed_to_req(struct ptlrpc_request *req)
2837 struct obd_export *exp = req->rq_export;
2839 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2840 lustre_msg_set_last_committed(req->rq_repmsg,
2841 exp->exp_last_committed);
2843 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2844 "%d)", exp->exp_obd->obd_no_transno,
2845 req->rq_repmsg == NULL);
2847 CDEBUG(D_INFO, "last_committed %llu, transno %llu, xid %llu\n",
2848 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2851 #endif /* HAVE_SERVER_SUPPORT */
2854 * Packs current SLV and Limit into \a req.
2856 int target_pack_pool_reply(struct ptlrpc_request *req)
2858 struct obd_device *obd;
2861 /* Check that we still have all structures alive as this may
2862 * be some late RPC at shutdown time. */
2863 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2864 !exp_connect_lru_resize(req->rq_export))) {
2865 lustre_msg_set_slv(req->rq_repmsg, 0);
2866 lustre_msg_set_limit(req->rq_repmsg, 0);
2870 /* OBD is alive here as export is alive, which we checked above. */
2871 obd = req->rq_export->exp_obd;
2873 read_lock(&obd->obd_pool_lock);
2874 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2875 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2876 read_unlock(&obd->obd_pool_lock);
2881 static int target_send_reply_msg(struct ptlrpc_request *req,
2882 int rc, int fail_id)
2884 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2885 DEBUG_REQ(D_ERROR, req, "dropping reply");
2888 /* We can have a null rq_reqmsg in the event of bad signature or
2889 * no context when unwrapping */
2890 if (req->rq_reqmsg &&
2891 unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
2892 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET_REP)))
2896 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2897 req->rq_status = rc;
2898 return ptlrpc_send_error(req, 1);
2900 DEBUG_REQ(D_NET, req, "sending reply");
2903 return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
2906 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2908 struct ptlrpc_service_part *svcpt;
2910 struct ptlrpc_reply_state *rs;
2911 struct obd_export *exp;
2914 if (req->rq_no_reply) {
2919 svcpt = req->rq_rqbd->rqbd_svcpt;
2920 rs = req->rq_reply_state;
2921 if (rs == NULL || !rs->rs_difficult) {
2923 target_send_reply_msg (req, rc, fail_id);
2928 /* must be an export if locks saved */
2929 LASSERT(req->rq_export != NULL);
2930 /* req/reply consistent */
2931 LASSERT(rs->rs_svcpt == svcpt);
2934 LASSERT(!rs->rs_scheduled);
2935 LASSERT(!rs->rs_scheduled_ever);
2936 LASSERT(!rs->rs_handled);
2937 LASSERT(!rs->rs_on_net);
2938 LASSERT(rs->rs_export == NULL);
2939 LASSERT(list_empty(&rs->rs_obd_list));
2940 LASSERT(list_empty(&rs->rs_exp_list));
2942 exp = class_export_get(req->rq_export);
2944 /* disable reply scheduling while I'm setting up */
2945 rs->rs_scheduled = 1;
2947 rs->rs_xid = req->rq_xid;
2948 rs->rs_transno = req->rq_transno;
2949 rs->rs_export = exp;
2950 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2952 spin_lock(&exp->exp_uncommitted_replies_lock);
2953 CDEBUG(D_NET, "rs transno = %llu, last committed = %llu\n",
2954 rs->rs_transno, exp->exp_last_committed);
2955 if (rs->rs_transno > exp->exp_last_committed) {
2956 /* not committed already */
2957 list_add_tail(&rs->rs_obd_list,
2958 &exp->exp_uncommitted_replies);
2960 spin_unlock(&exp->exp_uncommitted_replies_lock);
2962 spin_lock(&exp->exp_lock);
2963 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2964 spin_unlock(&exp->exp_lock);
2966 netrc = target_send_reply_msg(req, rc, fail_id);
2968 spin_lock(&svcpt->scp_rep_lock);
2970 atomic_inc(&svcpt->scp_nreps_difficult);
2973 /* error sending: reply is off the net. Also we need +1
2974 * reply ref until ptlrpc_handle_rs() is done
2975 * with the reply state (if the send was successful, there
2976 * would have been +1 ref for the net, which
2977 * reply_out_callback leaves alone) */
2979 ptlrpc_rs_addref(rs);
2982 spin_lock(&rs->rs_lock);
2983 if (rs->rs_transno <= exp->exp_last_committed ||
2984 (!rs->rs_on_net && !rs->rs_no_ack) ||
2985 list_empty(&rs->rs_exp_list) || /* completed already */
2986 list_empty(&rs->rs_obd_list)) {
2987 CDEBUG(D_HA, "Schedule reply immediately\n");
2988 ptlrpc_dispatch_difficult_reply(rs);
2990 list_add(&rs->rs_list, &svcpt->scp_rep_active);
2991 rs->rs_scheduled = 0; /* allow notifier to schedule */
2993 spin_unlock(&rs->rs_lock);
2994 spin_unlock(&svcpt->scp_rep_lock);
2998 enum ldlm_mode lck_compat_array[] = {
2999 [LCK_EX] = LCK_COMPAT_EX,
3000 [LCK_PW] = LCK_COMPAT_PW,
3001 [LCK_PR] = LCK_COMPAT_PR,
3002 [LCK_CW] = LCK_COMPAT_CW,
3003 [LCK_CR] = LCK_COMPAT_CR,
3004 [LCK_NL] = LCK_COMPAT_NL,
3005 [LCK_GROUP] = LCK_COMPAT_GROUP,
3006 [LCK_COS] = LCK_COMPAT_COS,
3010 * Rather arbitrary mapping from LDLM error codes to errno values. This should
3011 * not escape to the user level.
3013 int ldlm_error2errno(enum ldlm_error error)
3019 case ELDLM_LOCK_MATCHED:
3022 case ELDLM_LOCK_CHANGED:
3025 case ELDLM_LOCK_ABORTED:
3028 case ELDLM_LOCK_REPLACED:
3031 case ELDLM_NO_LOCK_DATA:
3034 case ELDLM_NAMESPACE_EXISTS:
3037 case ELDLM_BAD_NAMESPACE:
3041 if (((int)error) < 0) { /* cast to signed type */
3042 result = error; /* as ldlm_error can be unsigned */
3044 CERROR("Invalid DLM result code: %d\n", error);
3050 EXPORT_SYMBOL(ldlm_error2errno);
3053 * Dual to ldlm_error2errno(): maps errno values back to enum ldlm_error.
3055 enum ldlm_error ldlm_errno2error(int err_no)
3064 error = ELDLM_LOCK_CHANGED;
3067 error = ELDLM_LOCK_ABORTED;
3070 error = ELDLM_LOCK_REPLACED;
3073 error = ELDLM_NO_LOCK_DATA;
3076 error = ELDLM_NAMESPACE_EXISTS;
3079 error = ELDLM_BAD_NAMESPACE;
3087 #if LUSTRE_TRACKS_LOCK_EXP_REFS
3088 void ldlm_dump_export_locks(struct obd_export *exp)
3090 spin_lock(&exp->exp_locks_list_guard);
3091 if (!list_empty(&exp->exp_locks_list)) {
3092 struct ldlm_lock *lock;
3094 CERROR("dumping locks for export %p,"
3095 "ignore if the unmount doesn't hang\n", exp);
3096 list_for_each_entry(lock, &exp->exp_locks_list,
3098 LDLM_ERROR(lock, "lock:");
3100 spin_unlock(&exp->exp_locks_list_guard);
3104 #ifdef HAVE_SERVER_SUPPORT
3105 static int target_bulk_timeout(void *data)
3108 /* We don't fail the connection here, because having the export
3109 * killed makes the (vital) call to commitrw very sad.
3114 static inline const char *bulk2type(struct ptlrpc_request *req)
3116 if (req->rq_bulk_read)
3118 if (req->rq_bulk_write)
3123 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
3124 struct l_wait_info *lwi)
3126 struct ptlrpc_request *req = desc->bd_req;
3127 time64_t start = ktime_get_real_seconds();
3133 /* If there is eviction in progress, wait for it to finish. */
3134 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
3135 *lwi = LWI_INTR(NULL, NULL);
3136 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
3137 !atomic_read(&exp->exp_obd->
3138 obd_evict_inprogress),
3142 /* Check if client was evicted or reconnected already. */
3143 if (exp->exp_failed ||
3144 exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3147 if (req->rq_bulk_read)
3148 rc = sptlrpc_svc_wrap_bulk(req, desc);
3150 if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
3151 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
3152 else /* old version, bulk matchbits is rq_xid */
3153 req->rq_mbits = req->rq_xid;
3156 rc = ptlrpc_start_bulk_transfer(desc);
3160 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
3161 bulk2type(req), rc);
3165 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
3166 ptlrpc_abort_bulk(desc);
3170 /* limit actual bulk transfer to bulk_timeout seconds */
3171 deadline = start + bulk_timeout;
3172 if (deadline > req->rq_deadline)
3173 deadline = req->rq_deadline;
3176 time64_t timeoutl = deadline - ktime_get_real_seconds();
3177 long timeout_jiffies = timeoutl <= 0 ?
3178 1 : cfs_time_seconds(timeoutl);
3179 time64_t rq_deadline;
3181 *lwi = LWI_TIMEOUT_INTERVAL(timeout_jiffies,
3182 cfs_time_seconds(1),
3183 target_bulk_timeout, desc);
3184 rc = l_wait_event(desc->bd_waitq,
3185 !ptlrpc_server_bulk_active(desc) ||
3188 lustre_msg_get_conn_cnt(req->rq_reqmsg),
3190 LASSERT(rc == 0 || rc == -ETIMEDOUT);
3191 /* Wait again if we changed rq_deadline. */
3192 rq_deadline = ACCESS_ONCE(req->rq_deadline);
3193 deadline = start + bulk_timeout;
3194 if (deadline > rq_deadline)
3195 deadline = rq_deadline;
3196 } while (rc == -ETIMEDOUT &&
3197 deadline > ktime_get_real_seconds());
3199 if (rc == -ETIMEDOUT) {
3200 DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %lld%+llds",
3201 bulk2type(req), deadline - start,
3202 ktime_get_real_seconds() - deadline);
3203 ptlrpc_abort_bulk(desc);
3204 } else if (exp->exp_failed) {
3205 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
3208 ptlrpc_abort_bulk(desc);
3209 } else if (exp->exp_conn_cnt >
3210 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3211 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
3213 /* We don't reply anyway. */
3215 ptlrpc_abort_bulk(desc);
3216 } else if (desc->bd_failure) {
3217 DEBUG_REQ(D_ERROR, req, "network error on bulk %s",
3219 /* XXX should this be a different errno? */
3222 if (req->rq_bulk_write)
3223 rc = sptlrpc_svc_unwrap_bulk(req, desc);
3224 if (rc == 0 && desc->bd_nob_transferred != desc->bd_nob) {
3225 DEBUG_REQ(D_ERROR, req, "truncated bulk %s %d(%d)",
3226 bulk2type(req), desc->bd_nob_transferred,
3228 /* XXX should this be a different errno? */
3235 EXPORT_SYMBOL(target_bulk_io);
3237 #endif /* HAVE_SERVER_SUPPORT */