4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2010, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * This file deals with various client/target related logic including recovery.
40 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
44 #define DEBUG_SUBSYSTEM S_LDLM
47 # include <libcfs/libcfs.h>
49 # include <liblustre.h>
52 #include <obd_class.h>
53 #include <lustre_dlm.h>
54 #include <lustre_net.h>
55 #include <lustre_sec.h>
56 #include "ldlm_internal.h"
58 /* @priority: If non-zero, move the selected connection to the list head.
59 * @create: If zero, only search in existing connections.
61 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
62 int priority, int create)
64 struct ptlrpc_connection *ptlrpc_conn;
65 struct obd_import_conn *imp_conn = NULL, *item;
69 if (!create && !priority) {
70 CDEBUG(D_HA, "Nothing to do\n");
74 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
76 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
81 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
83 GOTO(out_put, rc = -ENOMEM);
87 spin_lock(&imp->imp_lock);
88 cfs_list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
89 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
91 cfs_list_del(&item->oic_item);
92 cfs_list_add(&item->oic_item,
94 item->oic_last_attempt = 0;
96 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
97 imp, imp->imp_obd->obd_name, uuid->uuid,
98 (priority ? ", moved to head" : ""));
99 spin_unlock(&imp->imp_lock);
100 GOTO(out_free, rc = 0);
103 /* No existing import connection found for \a uuid. */
105 imp_conn->oic_conn = ptlrpc_conn;
106 imp_conn->oic_uuid = *uuid;
107 imp_conn->oic_last_attempt = 0;
109 cfs_list_add(&imp_conn->oic_item, &imp->imp_conn_list);
111 cfs_list_add_tail(&imp_conn->oic_item,
112 &imp->imp_conn_list);
113 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
114 imp, imp->imp_obd->obd_name, uuid->uuid,
115 (priority ? "head" : "tail"));
117 spin_unlock(&imp->imp_lock);
118 GOTO(out_free, rc = -ENOENT);
121 spin_unlock(&imp->imp_lock);
125 OBD_FREE(imp_conn, sizeof(*imp_conn));
127 ptlrpc_connection_put(ptlrpc_conn);
131 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
133 return import_set_conn(imp, uuid, 1, 0);
136 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
139 return import_set_conn(imp, uuid, priority, 1);
141 EXPORT_SYMBOL(client_import_add_conn);
143 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
145 struct obd_import_conn *imp_conn;
146 struct obd_export *dlmexp;
150 spin_lock(&imp->imp_lock);
151 if (cfs_list_empty(&imp->imp_conn_list)) {
152 LASSERT(!imp->imp_connection);
156 cfs_list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
157 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
159 LASSERT(imp_conn->oic_conn);
161 if (imp_conn == imp->imp_conn_current) {
162 LASSERT(imp_conn->oic_conn == imp->imp_connection);
164 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
165 imp->imp_state != LUSTRE_IMP_DISCON) {
166 CERROR("can't remove current connection\n");
167 GOTO(out, rc = -EBUSY);
170 ptlrpc_connection_put(imp->imp_connection);
171 imp->imp_connection = NULL;
173 dlmexp = class_conn2export(&imp->imp_dlm_handle);
174 if (dlmexp && dlmexp->exp_connection) {
175 LASSERT(dlmexp->exp_connection ==
177 ptlrpc_connection_put(dlmexp->exp_connection);
178 dlmexp->exp_connection = NULL;
182 cfs_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 cfs_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
264 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
266 struct client_obd *cli = &obddev->u.cli;
267 struct obd_import *imp;
268 struct obd_uuid server_uuid;
269 int rq_portal, rp_portal, connect_op;
270 char *name = obddev->obd_type->typ_name;
271 ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
273 char *cli_name = lustre_cfg_buf(lcfg, 0);
276 /* In a more perfect world, we would hang a ptlrpc_client off of
277 * obd_type and just use the values from there. */
278 if (!strcmp(name, LUSTRE_OSC_NAME) ||
279 (!(strcmp(name, LUSTRE_OSP_NAME)) &&
280 (is_osp_on_mdt(cli_name) &&
281 strstr(lustre_cfg_buf(lcfg, 1), "OST") != NULL))) {
282 /* OSC or OSP_on_MDT for OSTs */
283 rq_portal = OST_REQUEST_PORTAL;
284 rp_portal = OSC_REPLY_PORTAL;
285 connect_op = OST_CONNECT;
286 cli->cl_sp_me = LUSTRE_SP_CLI;
287 cli->cl_sp_to = LUSTRE_SP_OST;
288 ns_type = LDLM_NS_TYPE_OSC;
289 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
290 !strcmp(name, LUSTRE_LWP_NAME) ||
291 (!strcmp(name, LUSTRE_OSP_NAME) &&
292 (is_osp_on_mdt(cli_name) &&
293 strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL))) {
294 /* MDC or OSP_on_MDT for other MDTs */
295 rq_portal = MDS_REQUEST_PORTAL;
296 rp_portal = MDC_REPLY_PORTAL;
297 connect_op = MDS_CONNECT;
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_MGC_NAME)) {
302 rq_portal = MGS_REQUEST_PORTAL;
303 rp_portal = MGC_REPLY_PORTAL;
304 connect_op = MGS_CONNECT;
305 cli->cl_sp_me = LUSTRE_SP_MGC;
306 cli->cl_sp_to = LUSTRE_SP_MGS;
307 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
308 ns_type = LDLM_NS_TYPE_MGC;
310 CERROR("unknown client OBD type \"%s\", can't setup\n",
315 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
316 CERROR("requires a TARGET UUID\n");
320 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
321 CERROR("client UUID must be less than 38 characters\n");
325 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
326 CERROR("setup requires a SERVER UUID\n");
330 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
331 CERROR("target UUID must be less than 38 characters\n");
335 init_rwsem(&cli->cl_sem);
336 sema_init(&cli->cl_mgc_sem, 1);
337 cli->cl_conn_count = 0;
338 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
339 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
340 sizeof(server_uuid)));
343 cli->cl_avail_grant = 0;
344 /* FIXME: Should limit this for the sum of all cl_dirty_max. */
345 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
346 if (cli->cl_dirty_max >> PAGE_CACHE_SHIFT > totalram_pages / 8)
347 cli->cl_dirty_max = totalram_pages << (PAGE_CACHE_SHIFT - 3);
348 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
349 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
350 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
351 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
352 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
353 client_obd_list_lock_init(&cli->cl_loi_list_lock);
354 cfs_atomic_set(&cli->cl_pending_w_pages, 0);
355 cfs_atomic_set(&cli->cl_pending_r_pages, 0);
356 cli->cl_r_in_flight = 0;
357 cli->cl_w_in_flight = 0;
359 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
360 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
361 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
362 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
363 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
364 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
367 CFS_INIT_LIST_HEAD(&cli->cl_lru_osc);
368 cfs_atomic_set(&cli->cl_lru_shrinkers, 0);
369 cfs_atomic_set(&cli->cl_lru_busy, 0);
370 cfs_atomic_set(&cli->cl_lru_in_list, 0);
371 CFS_INIT_LIST_HEAD(&cli->cl_lru_list);
372 client_obd_list_lock_init(&cli->cl_lru_list_lock);
373 cfs_atomic_set(&cli->cl_unstable_count, 0);
375 init_waitqueue_head(&cli->cl_destroy_waitq);
376 cfs_atomic_set(&cli->cl_destroy_in_flight, 0);
377 #ifdef ENABLE_CHECKSUM
378 /* Turn on checksumming by default. */
379 cli->cl_checksum = 1;
381 * The supported checksum types will be worked out at connect time
382 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
385 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
387 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
389 /* This value may be reduced at connect time in
390 * ptlrpc_connect_interpret() . We initialize it to only
391 * 1MB until we know what the performance looks like.
392 * In the future this should likely be increased. LU-1431 */
393 cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
394 LNET_MTU >> PAGE_CACHE_SHIFT);
396 if (!strcmp(name, LUSTRE_MDC_NAME)) {
397 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
398 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) {
399 cli->cl_max_rpcs_in_flight = 2;
400 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) {
401 cli->cl_max_rpcs_in_flight = 3;
402 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
403 cli->cl_max_rpcs_in_flight = 4;
405 if (osc_on_mdt(obddev->obd_name))
406 cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
408 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
412 CERROR("ldlm_get_ref failed: %d\n", rc);
416 ptlrpc_init_client(rq_portal, rp_portal, name,
417 &obddev->obd_ldlm_client);
419 imp = class_new_import(obddev);
421 GOTO(err_ldlm, rc = -ENOENT);
422 imp->imp_client = &obddev->obd_ldlm_client;
423 imp->imp_connect_op = connect_op;
424 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
425 LUSTRE_CFG_BUFLEN(lcfg, 1));
426 class_import_put(imp);
428 rc = client_import_add_conn(imp, &server_uuid, 1);
430 CERROR("can't add initial connection\n");
431 GOTO(err_import, rc);
434 cli->cl_import = imp;
435 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
436 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
437 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
439 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
440 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
441 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
442 name, obddev->obd_name,
443 cli->cl_target_uuid.uuid);
444 spin_lock(&imp->imp_lock);
445 imp->imp_deactive = 1;
446 spin_unlock(&imp->imp_lock);
450 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
451 LDLM_NAMESPACE_CLIENT,
452 LDLM_NAMESPACE_GREEDY,
454 if (obddev->obd_namespace == NULL) {
455 CERROR("Unable to create client namespace - %s\n",
457 GOTO(err_import, rc = -ENOMEM);
460 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
465 class_destroy_import(imp);
472 EXPORT_SYMBOL(client_obd_setup);
474 int client_obd_cleanup(struct obd_device *obddev)
478 ldlm_namespace_free_post(obddev->obd_namespace);
479 obddev->obd_namespace = NULL;
481 obd_cleanup_client_import(obddev);
482 LASSERT(obddev->u.cli.cl_import == NULL);
487 EXPORT_SYMBOL(client_obd_cleanup);
489 /* ->o_connect() method for client side (OSC and MDC and MGC) */
490 int client_connect_import(const struct lu_env *env,
491 struct obd_export **exp,
492 struct obd_device *obd, struct obd_uuid *cluuid,
493 struct obd_connect_data *data, void *localdata)
495 struct client_obd *cli = &obd->u.cli;
496 struct obd_import *imp = cli->cl_import;
497 struct obd_connect_data *ocd;
498 struct lustre_handle conn = { 0 };
503 down_write(&cli->cl_sem);
504 if (cli->cl_conn_count > 0 )
505 GOTO(out_sem, rc = -EALREADY);
507 rc = class_connect(&conn, obd, cluuid);
511 cli->cl_conn_count++;
512 *exp = class_conn2export(&conn);
514 LASSERT(obd->obd_namespace);
516 imp->imp_dlm_handle = conn;
517 rc = ptlrpc_init_import(imp);
521 ocd = &imp->imp_connect_data;
524 imp->imp_connect_flags_orig = data->ocd_connect_flags;
527 rc = ptlrpc_connect_import(imp);
529 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
532 LASSERT((*exp)->exp_connection);
535 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
536 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
537 data->ocd_connect_flags, ocd->ocd_connect_flags);
538 data->ocd_connect_flags = ocd->ocd_connect_flags;
541 ptlrpc_pinger_add_import(imp);
547 cli->cl_conn_count--;
548 class_disconnect(*exp);
552 up_write(&cli->cl_sem);
556 EXPORT_SYMBOL(client_connect_import);
558 int client_disconnect_export(struct obd_export *exp)
560 struct obd_device *obd = class_exp2obd(exp);
561 struct client_obd *cli;
562 struct obd_import *imp;
567 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
568 exp, exp ? exp->exp_handle.h_cookie : -1);
573 imp = cli->cl_import;
575 down_write(&cli->cl_sem);
576 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
579 if (!cli->cl_conn_count) {
580 CERROR("disconnecting disconnected device (%s)\n",
582 GOTO(out_disconnect, rc = -EINVAL);
585 cli->cl_conn_count--;
586 if (cli->cl_conn_count)
587 GOTO(out_disconnect, rc = 0);
589 /* Mark import deactivated now, so we don't try to reconnect if any
590 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
591 * fully deactivate the import, or that would drop all requests. */
592 spin_lock(&imp->imp_lock);
593 imp->imp_deactive = 1;
594 spin_unlock(&imp->imp_lock);
596 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
597 * delete it regardless. (It's safe to delete an import that was
599 (void)ptlrpc_pinger_del_import(imp);
601 if (obd->obd_namespace != NULL) {
602 /* obd_force == local only */
603 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
604 obd->obd_force ? LCF_LOCAL : 0, NULL);
605 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
608 /* There's no need to hold sem while disconnecting an import,
609 * and it may actually cause deadlock in GSS. */
610 up_write(&cli->cl_sem);
611 rc = ptlrpc_disconnect_import(imp, 0);
612 down_write(&cli->cl_sem);
614 ptlrpc_invalidate_import(imp);
619 /* Use server style - class_disconnect should be always called for
621 err = class_disconnect(exp);
625 up_write(&cli->cl_sem);
629 EXPORT_SYMBOL(client_disconnect_export);
631 #ifdef HAVE_SERVER_SUPPORT
632 int server_disconnect_export(struct obd_export *exp)
637 /* Disconnect early so that clients can't keep using export. */
638 rc = class_disconnect(exp);
639 /* Close import to avoid sending any requests. */
640 if (exp->exp_imp_reverse)
641 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
643 if (exp->exp_obd->obd_namespace != NULL)
644 ldlm_cancel_locks_for_export(exp);
646 /* complete all outstanding replies */
647 spin_lock(&exp->exp_lock);
648 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
649 struct ptlrpc_reply_state *rs =
650 cfs_list_entry(exp->exp_outstanding_replies.next,
651 struct ptlrpc_reply_state, rs_exp_list);
652 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
654 spin_lock(&svcpt->scp_rep_lock);
656 cfs_list_del_init(&rs->rs_exp_list);
657 spin_lock(&rs->rs_lock);
658 ptlrpc_schedule_difficult_reply(rs);
659 spin_unlock(&rs->rs_lock);
661 spin_unlock(&svcpt->scp_rep_lock);
663 spin_unlock(&exp->exp_lock);
667 EXPORT_SYMBOL(server_disconnect_export);
669 /* --------------------------------------------------------------------------
670 * from old lib/target.c
671 * -------------------------------------------------------------------------- */
673 static int target_handle_reconnect(struct lustre_handle *conn,
674 struct obd_export *exp,
675 struct obd_uuid *cluuid)
679 if (exp->exp_connection && exp->exp_imp_reverse) {
680 struct lustre_handle *hdl;
681 struct obd_device *target;
683 hdl = &exp->exp_imp_reverse->imp_remote_handle;
684 target = exp->exp_obd;
686 /* Might be a re-connect after a partition. */
687 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
688 if (target->obd_recovering) {
689 int timeout = cfs_duration_sec(cfs_time_sub(
691 &target->obd_recovery_timer),
692 cfs_time_current()));
694 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
695 "ing, waiting for %d clients in recov"
696 "ery for %d:%.02d\n", target->obd_name,
697 obd_uuid2str(&exp->exp_client_uuid),
698 obd_export_nid2str(exp),
699 target->obd_max_recoverable_clients,
700 timeout / 60, timeout % 60);
702 LCONSOLE_WARN("%s: Client %s (at %s) "
703 "reconnecting\n", target->obd_name,
704 obd_uuid2str(&exp->exp_client_uuid),
705 obd_export_nid2str(exp));
708 conn->cookie = exp->exp_handle.h_cookie;
709 /* target_handle_connect() treats EALREADY and
710 * -EALREADY differently. EALREADY means we are
711 * doing a valid reconnect from the same client. */
714 LCONSOLE_WARN("%s: already connected client %s (at %s) "
715 "with handle "LPX64". Rejecting client "
716 "with the same UUID trying to reconnect "
717 "with handle "LPX64"\n", target->obd_name,
718 obd_uuid2str(&exp->exp_client_uuid),
719 obd_export_nid2str(exp),
720 hdl->cookie, conn->cookie);
721 memset(conn, 0, sizeof *conn);
722 /* target_handle_connect() treats EALREADY and
723 * -EALREADY differently. -EALREADY is an error
724 * (same UUID, different handle). */
729 conn->cookie = exp->exp_handle.h_cookie;
730 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
731 cluuid->uuid, exp, conn->cookie);
735 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
738 struct obd_export *exp = cb_data;
740 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
741 obd->obd_name, exp->exp_client_uuid.uuid);
743 spin_lock(&exp->exp_lock);
744 exp->exp_need_sync = 0;
745 spin_unlock(&exp->exp_lock);
746 class_export_cb_put(exp);
748 EXPORT_SYMBOL(target_client_add_cb);
752 check_and_start_recovery_timer(struct obd_device *obd,
753 struct ptlrpc_request *req, int new_client);
756 check_and_start_recovery_timer(struct obd_device *obd,
757 struct ptlrpc_request *req, int new_client)
762 int target_handle_connect(struct ptlrpc_request *req)
764 struct obd_device *target = NULL, *targref = NULL;
765 struct obd_export *export = NULL;
766 struct obd_import *revimp;
767 struct obd_import *tmp_imp = NULL;
768 struct lustre_handle conn;
769 struct lustre_handle *tmp;
770 struct obd_uuid tgtuuid;
771 struct obd_uuid cluuid;
772 struct obd_uuid remote_uuid;
777 bool mds_conn = false, lw_client = false;
778 struct obd_connect_data *data, *tmpdata;
780 lnet_nid_t *client_nid = NULL;
783 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
785 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
787 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
788 GOTO(out, rc = -EINVAL);
791 obd_str2uuid(&tgtuuid, str);
792 target = class_uuid2obd(&tgtuuid);
794 target = class_name2obd(str);
797 deuuidify(str, NULL, &target_start, &target_len);
798 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
799 "from %s (no target). If you are running "
800 "an HA pair check that the target is "
801 "mounted on the other server.\n", str,
802 libcfs_nid2str(req->rq_peer.nid));
803 GOTO(out, rc = -ENODEV);
806 spin_lock(&target->obd_dev_lock);
807 if (target->obd_stopping || !target->obd_set_up) {
808 spin_unlock(&target->obd_dev_lock);
810 deuuidify(str, NULL, &target_start, &target_len);
811 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
812 target_len, target_start,
813 libcfs_nid2str(req->rq_peer.nid),
814 (target->obd_stopping ?
815 "stopping" : "not set up"));
816 GOTO(out, rc = -ENODEV);
819 if (target->obd_no_conn) {
820 spin_unlock(&target->obd_dev_lock);
822 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
823 "from %s\n", target->obd_name,
824 libcfs_nid2str(req->rq_peer.nid));
825 GOTO(out, rc = -EAGAIN);
828 /* Make sure the target isn't cleaned up while we're here. Yes,
829 * there's still a race between the above check and our incref here.
830 * Really, class_uuid2obd should take the ref. */
831 targref = class_incref(target, __FUNCTION__, current);
833 target->obd_conn_inprogress++;
834 spin_unlock(&target->obd_dev_lock);
836 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
838 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
839 GOTO(out, rc = -EINVAL);
842 obd_str2uuid(&cluuid, str);
844 /* XXX Extract a nettype and format accordingly. */
845 switch (sizeof(lnet_nid_t)) {
846 /* NB the casts only avoid compiler warnings. */
848 snprintf(remote_uuid.uuid, sizeof remote_uuid,
849 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
852 snprintf(remote_uuid.uuid, sizeof remote_uuid,
853 "NET_%x_UUID", (__u32)req->rq_peer.nid);
859 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
861 GOTO(out, rc = -EPROTO);
865 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
867 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
869 GOTO(out, rc = -EPROTO);
871 rc = req_capsule_server_pack(&req->rq_pill);
875 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
876 if (data->ocd_version < LUSTRE_VERSION_CODE -
877 LUSTRE_VERSION_ALLOWED_OFFSET ||
878 data->ocd_version > LUSTRE_VERSION_CODE +
879 LUSTRE_VERSION_ALLOWED_OFFSET) {
880 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
881 "libclient connection attempt",
882 data->ocd_version < LUSTRE_VERSION_CODE ?
884 OBD_OCD_VERSION_MAJOR(data->ocd_version),
885 OBD_OCD_VERSION_MINOR(data->ocd_version),
886 OBD_OCD_VERSION_PATCH(data->ocd_version),
887 OBD_OCD_VERSION_FIX(data->ocd_version));
888 data = req_capsule_server_sized_get(&req->rq_pill,
890 offsetof(typeof(*data), ocd_version) +
891 sizeof(data->ocd_version));
893 data->ocd_connect_flags = OBD_CONNECT_VERSION;
894 data->ocd_version = LUSTRE_VERSION_CODE;
896 GOTO(out, rc = -EPROTO);
900 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
901 (data->ocd_connect_flags & OBD_CONNECT_MDS))
904 if ((data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
907 /* lctl gets a backstage, all-access pass. */
908 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
909 goto dont_check_exports;
911 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
915 /* We've found an export in the hash. */
917 spin_lock(&export->exp_lock);
919 if (export->exp_connecting) { /* bug 9635, et. al. */
920 spin_unlock(&export->exp_lock);
921 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
922 export->exp_obd->obd_name, export,
923 libcfs_nid2str(req->rq_peer.nid));
924 class_export_put(export);
927 } else if (mds_conn && export->exp_connection) {
928 spin_unlock(&export->exp_lock);
929 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
930 /* MDS reconnected after failover. */
931 LCONSOLE_WARN("%s: Received MDS connection from "
932 "%s, removing former export from %s\n",
933 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
934 libcfs_nid2str(export->exp_connection->c_peer.nid));
936 /* New MDS connection from the same NID. */
937 LCONSOLE_WARN("%s: Received new MDS connection from "
938 "%s, removing former export from same NID\n",
939 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
940 class_fail_export(export);
941 class_export_put(export);
944 } else if (export->exp_connection != NULL &&
945 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
946 (lustre_msg_get_op_flags(req->rq_reqmsg) &
947 MSG_CONNECT_INITIAL)) {
948 spin_unlock(&export->exp_lock);
949 /* In MDS failover we have static UUID but NID can change. */
950 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
951 "existing nid %s is already connected\n",
952 target->obd_name, cluuid.uuid,
953 libcfs_nid2str(req->rq_peer.nid),
955 export->exp_connection->c_peer.nid));
957 class_export_put(export);
960 export->exp_connecting = 1;
961 spin_unlock(&export->exp_lock);
962 LASSERT(export->exp_obd == target);
964 rc = target_handle_reconnect(&conn, export, &cluuid);
967 /* If we found an export, we already unlocked. */
970 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
971 } else if (req->rq_export == NULL &&
972 cfs_atomic_read(&export->exp_rpc_count) > 0) {
973 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
974 "still busy with %d references\n",
975 target->obd_name, cluuid.uuid,
976 libcfs_nid2str(req->rq_peer.nid),
977 cfs_atomic_read(&export->exp_refcount));
978 GOTO(out, rc = -EBUSY);
979 } else if (req->rq_export != NULL &&
980 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
981 /* The current connect RPC has increased exp_rpc_count. */
982 LCONSOLE_WARN("%s: Client %s (at %s) refused reconnection, "
983 "still busy with %d active RPCs\n",
984 target->obd_name, cluuid.uuid,
985 libcfs_nid2str(req->rq_peer.nid),
986 cfs_atomic_read(&export->exp_rpc_count) - 1);
987 spin_lock(&export->exp_lock);
988 if (req->rq_export->exp_conn_cnt <
989 lustre_msg_get_conn_cnt(req->rq_reqmsg))
990 /* try to abort active requests */
991 req->rq_export->exp_abort_active_req = 1;
992 spin_unlock(&export->exp_lock);
993 GOTO(out, rc = -EBUSY);
994 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
995 if (!strstr(cluuid.uuid, "mdt"))
996 LCONSOLE_WARN("%s: Rejecting reconnect from the "
997 "known client %s (at %s) because it "
998 "is indicating it is a new client",
999 target->obd_name, cluuid.uuid,
1000 libcfs_nid2str(req->rq_peer.nid));
1001 GOTO(out, rc = -EALREADY);
1003 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1010 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
1011 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1012 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1013 export, (long)cfs_time_current_sec(),
1014 export ? (long)export->exp_last_request_time : 0);
1016 /* If this is the first time a client connects, reset the recovery
1017 * timer. Discard lightweight connections which might be local. */
1018 if (!lw_client && rc == 0 && target->obd_recovering)
1019 check_and_start_recovery_timer(target, req, export == NULL);
1021 /* We want to handle EALREADY but *not* -EALREADY from
1022 * target_handle_reconnect(), return reconnection state in a flag. */
1023 if (rc == EALREADY) {
1024 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1030 /* Tell the client if we support replayable requests. */
1031 if (target->obd_replayable)
1032 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1033 client_nid = &req->rq_peer.nid;
1035 if (export == NULL) {
1036 /* allow lightweight connections during recovery */
1037 if (target->obd_recovering && !lw_client) {
1039 int c; /* connected */
1040 int i; /* in progress */
1042 int s; /* stale/evicted */
1044 c = cfs_atomic_read(&target->obd_connected_clients);
1045 i = cfs_atomic_read(&target->obd_lock_replay_clients);
1046 k = target->obd_max_recoverable_clients;
1047 s = target->obd_stale_clients;
1048 t = cfs_timer_deadline(&target->obd_recovery_timer);
1049 t = cfs_time_sub(t, cfs_time_current());
1050 t = cfs_duration_sec(t);
1051 LCONSOLE_WARN("%s: Denying connection for new client "
1052 "%s (at %s), waiting for all %d known "
1053 "clients (%d recovered, %d in progress, "
1054 "and %d evicted) to recover in %d:%.02d\n",
1055 target->obd_name, cluuid.uuid,
1056 libcfs_nid2str(req->rq_peer.nid), k,
1057 c - i, i, s, (int)t / 60,
1062 rc = obd_connect(req->rq_svc_thread->t_env,
1063 &export, target, &cluuid, data,
1065 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1066 lustre_msg_add_op_flags(req->rq_repmsg,
1067 MSG_CONNECT_RECOVERING);
1069 conn.cookie = export->exp_handle.h_cookie;
1072 rc = obd_reconnect(req->rq_svc_thread->t_env,
1073 export, target, &cluuid, data, client_nid);
1078 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 50, 0)
1079 /* 2.2.0 clients always swab nidtbl entries due to a bug, so server
1080 * will do the swabbing for if the client is using the same endianness.
1082 * This fixup is version-limited, because we don't want to carry the
1083 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we need
1084 * interop with unpatched 2.2 clients. For newer clients, servers
1085 * will never do MNE swabbing, let the client handle that. LU-1644 */
1086 export->exp_need_mne_swab = !ptlrpc_req_need_swab(req) &&
1087 !(data->ocd_connect_flags & OBD_CONNECT_MNE_SWAB);
1089 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and exp_need_mne_swab"
1092 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1093 data->ocd_instance = target->u.obt.obt_instance;
1095 /* Return only the parts of obd_connect_data that we understand, so the
1096 * client knows that we don't understand the rest. */
1098 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1100 tmpdata = req_capsule_server_get(&req->rq_pill,
1102 /* Don't use struct assignment here, because the client reply
1103 * buffer may be smaller/larger than the local struct
1104 * obd_connect_data. */
1105 memcpy(tmpdata, data, min(tmpsize, size));
1108 /* If all else goes well, this is our RPC return code. */
1111 lustre_msg_set_handle(req->rq_repmsg, &conn);
1113 /* If the client and the server are the same node, we will already
1114 * have an export that really points to the client's DLM export,
1115 * because we have a shared handles table.
1117 * XXX this will go away when shaver stops sending the "connect" handle
1118 * in the real "remote handle" field of the request --phik 24 Apr 2003
1120 ptlrpc_request_change_export(req, export);
1122 spin_lock(&export->exp_lock);
1123 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1124 spin_unlock(&export->exp_lock);
1125 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1126 "or equal conn_cnt: %d >= %d\n",
1127 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1128 export->exp_conn_cnt,
1129 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1131 GOTO(out, rc = -EALREADY);
1133 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1134 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1135 export->exp_abort_active_req = 0;
1137 /* Don't evict liblustre clients for not pinging. */
1138 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1139 export->exp_libclient = 1;
1140 spin_unlock(&export->exp_lock);
1142 spin_lock(&target->obd_dev_lock);
1143 cfs_list_del_init(&export->exp_obd_chain_timed);
1144 spin_unlock(&target->obd_dev_lock);
1146 spin_unlock(&export->exp_lock);
1149 if (export->exp_connection != NULL) {
1150 /* Check to see if connection came from another NID. */
1151 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1152 !cfs_hlist_unhashed(&export->exp_nid_hash))
1153 cfs_hash_del(export->exp_obd->obd_nid_hash,
1154 &export->exp_connection->c_peer.nid,
1155 &export->exp_nid_hash);
1157 ptlrpc_connection_put(export->exp_connection);
1160 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1163 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1164 cfs_hash_add(export->exp_obd->obd_nid_hash,
1165 &export->exp_connection->c_peer.nid,
1166 &export->exp_nid_hash);
1169 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1171 __u64 transno = data->ocd_transno;
1173 spin_lock(&export->exp_lock);
1174 /* possible race with class_disconnect_stale_exports,
1175 * export may be already in the eviction process */
1176 if (export->exp_failed) {
1177 spin_unlock(&export->exp_lock);
1178 GOTO(out, rc = -ENODEV);
1180 export->exp_in_recovery = 1;
1181 export->exp_req_replay_needed = 1;
1182 export->exp_lock_replay_needed = 1;
1183 spin_unlock(&export->exp_lock);
1185 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1186 MSG_CONNECT_TRANSNO);
1187 if (has_transno && transno == 0)
1188 CWARN("Connect with zero transno!\n");
1190 if (has_transno && transno > 0 &&
1191 transno < target->obd_next_recovery_transno &&
1192 transno > target->obd_last_committed) {
1193 /* Another way is to use cmpxchg() to be lock-free. */
1194 spin_lock(&target->obd_recovery_task_lock);
1195 if (transno < target->obd_next_recovery_transno)
1196 target->obd_next_recovery_transno = transno;
1197 spin_unlock(&target->obd_recovery_task_lock);
1200 cfs_atomic_inc(&target->obd_req_replay_clients);
1201 cfs_atomic_inc(&target->obd_lock_replay_clients);
1202 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1203 target->obd_max_recoverable_clients)
1204 wake_up(&target->obd_next_transno_waitq);
1207 /* Tell the client we're in recovery, when client is involved in it. */
1208 if (target->obd_recovering && !lw_client)
1209 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1211 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1214 /* Return -ENOTCONN in case of errors to let client reconnect. */
1215 revimp = class_new_import(target);
1216 if (revimp == NULL) {
1217 CERROR("fail to alloc new reverse import.\n");
1218 GOTO(out, rc = -ENOTCONN);
1221 spin_lock(&export->exp_lock);
1222 if (export->exp_imp_reverse != NULL)
1223 /* destroyed import can be still referenced in ctxt */
1224 tmp_imp = export->exp_imp_reverse;
1225 export->exp_imp_reverse = revimp;
1226 spin_unlock(&export->exp_lock);
1228 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1229 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1230 revimp->imp_remote_handle = conn;
1231 revimp->imp_dlm_fake = 1;
1232 revimp->imp_state = LUSTRE_IMP_FULL;
1234 /* Unknown versions will be caught in
1235 * ptlrpc_handle_server_req_in->lustre_unpack_msg(). */
1236 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1238 if ((data->ocd_connect_flags & OBD_CONNECT_AT) &&
1239 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1240 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1242 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1244 if ((data->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1245 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1246 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1248 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1250 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1252 CERROR("Failed to get sec for reverse import: %d\n", rc);
1253 spin_lock(&export->exp_lock);
1254 export->exp_imp_reverse = NULL;
1255 spin_unlock(&export->exp_lock);
1256 class_destroy_import(revimp);
1259 class_import_put(revimp);
1262 if (tmp_imp != NULL)
1263 client_destroy_import(tmp_imp);
1265 spin_lock(&export->exp_lock);
1266 export->exp_connecting = 0;
1267 spin_unlock(&export->exp_lock);
1269 class_export_put(export);
1272 spin_lock(&target->obd_dev_lock);
1273 target->obd_conn_inprogress--;
1274 spin_unlock(&target->obd_dev_lock);
1276 class_decref(targref, __func__, current);
1279 req->rq_status = rc;
1282 EXPORT_SYMBOL(target_handle_connect);
1284 int target_handle_disconnect(struct ptlrpc_request *req)
1289 rc = req_capsule_server_pack(&req->rq_pill);
1293 /* Keep the rq_export around so we can send the reply. */
1294 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1298 EXPORT_SYMBOL(target_handle_disconnect);
1300 void target_destroy_export(struct obd_export *exp)
1302 struct obd_import *imp = NULL;
1303 /* exports created from last_rcvd data, and "fake"
1304 exports created by lctl don't have an import */
1305 spin_lock(&exp->exp_lock);
1306 if (exp->exp_imp_reverse != NULL) {
1307 imp = exp->exp_imp_reverse;
1308 exp->exp_imp_reverse = NULL;
1310 spin_unlock(&exp->exp_lock);
1312 client_destroy_import(imp);
1314 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1315 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1316 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1317 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1319 EXPORT_SYMBOL(target_destroy_export);
1322 * Recovery functions
1324 static void target_request_copy_get(struct ptlrpc_request *req)
1326 class_export_rpc_inc(req->rq_export);
1327 LASSERT(cfs_list_empty(&req->rq_list));
1328 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1330 /* Increase refcount to keep request in queue. */
1331 cfs_atomic_inc(&req->rq_refcount);
1332 /* Let export know it has replays to be handled. */
1333 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1336 static void target_request_copy_put(struct ptlrpc_request *req)
1338 LASSERT(cfs_list_empty(&req->rq_replay_list));
1339 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1341 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1342 class_export_rpc_dec(req->rq_export);
1343 ptlrpc_server_drop_request(req);
1346 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1348 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1349 struct obd_export *exp = req->rq_export;
1350 struct ptlrpc_request *reqiter;
1355 spin_lock(&exp->exp_lock);
1356 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1358 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1365 /* We expect it with RESENT and REPLAY flags. */
1366 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1367 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1368 CERROR("invalid flags %x of resent replay\n",
1369 lustre_msg_get_flags(req->rq_reqmsg));
1371 cfs_list_add_tail(&req->rq_replay_list,
1372 &exp->exp_req_replay_queue);
1375 spin_unlock(&exp->exp_lock);
1379 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1381 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1382 LASSERT(req->rq_export);
1384 spin_lock(&req->rq_export->exp_lock);
1385 cfs_list_del_init(&req->rq_replay_list);
1386 spin_unlock(&req->rq_export->exp_lock);
1390 static void target_finish_recovery(struct obd_device *obd)
1394 /* Only log a recovery message when recovery has occurred. */
1395 if (obd->obd_recovery_start) {
1396 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1397 obd->obd_recovery_start);
1398 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1399 "%d recovered and %d %s evicted.\n", obd->obd_name,
1400 (int)elapsed_time / 60, (int)elapsed_time % 60,
1401 obd->obd_max_recoverable_clients,
1402 cfs_atomic_read(&obd->obd_connected_clients),
1403 obd->obd_stale_clients,
1404 obd->obd_stale_clients == 1 ? "was" : "were");
1407 ldlm_reprocess_all_ns(obd->obd_namespace);
1408 spin_lock(&obd->obd_recovery_task_lock);
1409 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1410 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1411 !cfs_list_empty(&obd->obd_final_req_queue)) {
1412 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1414 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1415 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1417 cfs_list_empty(&obd->obd_final_req_queue) ? \
1419 spin_unlock(&obd->obd_recovery_task_lock);
1422 spin_unlock(&obd->obd_recovery_task_lock);
1424 obd->obd_recovery_end = cfs_time_current_sec();
1426 /* When recovery finished, cleanup orphans on MDS and OST. */
1427 if (OBT(obd) && OBP(obd, postrecov)) {
1428 int rc = OBP(obd, postrecov)(obd);
1430 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1436 static void abort_req_replay_queue(struct obd_device *obd)
1438 struct ptlrpc_request *req, *n;
1439 cfs_list_t abort_list;
1441 CFS_INIT_LIST_HEAD(&abort_list);
1442 spin_lock(&obd->obd_recovery_task_lock);
1443 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1444 spin_unlock(&obd->obd_recovery_task_lock);
1445 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1446 DEBUG_REQ(D_WARNING, req, "aborted:");
1447 req->rq_status = -ENOTCONN;
1448 if (ptlrpc_error(req)) {
1449 DEBUG_REQ(D_ERROR, req,
1450 "failed abort_req_reply; skipping");
1452 target_exp_dequeue_req_replay(req);
1453 target_request_copy_put(req);
1457 static void abort_lock_replay_queue(struct obd_device *obd)
1459 struct ptlrpc_request *req, *n;
1460 cfs_list_t abort_list;
1462 CFS_INIT_LIST_HEAD(&abort_list);
1463 spin_lock(&obd->obd_recovery_task_lock);
1464 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1465 spin_unlock(&obd->obd_recovery_task_lock);
1466 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1467 DEBUG_REQ(D_ERROR, req, "aborted:");
1468 req->rq_status = -ENOTCONN;
1469 if (ptlrpc_error(req)) {
1470 DEBUG_REQ(D_ERROR, req,
1471 "failed abort_lock_reply; skipping");
1473 target_request_copy_put(req);
1477 /* Called from a cleanup function if the device is being cleaned up
1478 forcefully. The exports should all have been disconnected already,
1479 the only thing left to do is
1480 - clear the recovery flags
1482 - free queued requests and replies, but don't send replies
1483 Because the obd_stopping flag is set, no new requests should be received.
1486 void target_cleanup_recovery(struct obd_device *obd)
1488 struct ptlrpc_request *req, *n;
1489 cfs_list_t clean_list;
1492 CFS_INIT_LIST_HEAD(&clean_list);
1493 spin_lock(&obd->obd_dev_lock);
1494 if (!obd->obd_recovering) {
1495 spin_unlock(&obd->obd_dev_lock);
1499 obd->obd_recovering = obd->obd_abort_recovery = 0;
1500 spin_unlock(&obd->obd_dev_lock);
1502 spin_lock(&obd->obd_recovery_task_lock);
1503 target_cancel_recovery_timer(obd);
1504 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1505 spin_unlock(&obd->obd_recovery_task_lock);
1507 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1508 LASSERT(req->rq_reply_state == 0);
1509 target_exp_dequeue_req_replay(req);
1510 target_request_copy_put(req);
1513 spin_lock(&obd->obd_recovery_task_lock);
1514 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1515 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1516 spin_unlock(&obd->obd_recovery_task_lock);
1518 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1519 LASSERT(req->rq_reply_state == 0);
1520 target_request_copy_put(req);
1525 EXPORT_SYMBOL(target_cleanup_recovery);
1527 /* obd_recovery_task_lock should be held */
1528 void target_cancel_recovery_timer(struct obd_device *obd)
1530 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1531 cfs_timer_disarm(&obd->obd_recovery_timer);
1533 EXPORT_SYMBOL(target_cancel_recovery_timer);
1535 static void target_start_recovery_timer(struct obd_device *obd)
1537 if (obd->obd_recovery_start != 0)
1540 spin_lock(&obd->obd_dev_lock);
1541 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1542 spin_unlock(&obd->obd_dev_lock);
1546 LASSERT(obd->obd_recovery_timeout != 0);
1548 if (obd->obd_recovery_start != 0) {
1549 spin_unlock(&obd->obd_dev_lock);
1553 cfs_timer_arm(&obd->obd_recovery_timer,
1554 cfs_time_shift(obd->obd_recovery_timeout));
1555 obd->obd_recovery_start = cfs_time_current_sec();
1556 spin_unlock(&obd->obd_dev_lock);
1558 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1559 "or until %d client%s reconnect%s\n",
1561 obd->obd_recovery_timeout / 60,
1562 obd->obd_recovery_timeout % 60,
1563 obd->obd_max_recoverable_clients,
1564 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1565 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1569 * extend recovery window.
1571 * if @extend is true, extend recovery window to have @drt remaining at least;
1572 * otherwise, make sure the recovery timeout value is not less than @drt.
1574 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1578 cfs_duration_t left;
1581 spin_lock(&obd->obd_dev_lock);
1582 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1583 spin_unlock(&obd->obd_dev_lock);
1586 LASSERT(obd->obd_recovery_start != 0);
1588 now = cfs_time_current_sec();
1589 to = obd->obd_recovery_timeout;
1590 end = obd->obd_recovery_start + to;
1591 left = cfs_time_sub(end, now);
1593 if (extend && (drt > left)) {
1595 } else if (!extend && (drt > to)) {
1597 /* reduce drt by already passed time */
1598 drt -= obd->obd_recovery_timeout - left;
1601 if (to > obd->obd_recovery_time_hard)
1602 to = obd->obd_recovery_time_hard;
1603 if (obd->obd_recovery_timeout < to ||
1604 obd->obd_recovery_timeout == obd->obd_recovery_time_hard) {
1605 obd->obd_recovery_timeout = to;
1606 cfs_timer_arm(&obd->obd_recovery_timer,
1607 cfs_time_shift(drt));
1609 spin_unlock(&obd->obd_dev_lock);
1611 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1612 obd->obd_name, (unsigned)drt);
1615 /* Reset the timer with each new client connection */
1617 * This timer is actually reconnect_timer, which is for making sure
1618 * the total recovery window is at least as big as my reconnect
1619 * attempt timing. So the initial recovery time_out will be set to
1620 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1621 * from client is bigger than this, then the recovery time_out will
1622 * be extended to make sure the client could be reconnected, in the
1623 * process, the timeout from the new client should be ignored.
1627 check_and_start_recovery_timer(struct obd_device *obd,
1628 struct ptlrpc_request *req,
1631 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1632 struct obd_device_target *obt = &obd->u.obt;
1634 if (!new_client && service_time)
1635 /* Teach server about old server's estimates, as first guess
1636 * at how long new requests will take. */
1637 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1640 target_start_recovery_timer(obd);
1642 /* Convert the service time to RPC timeout,
1643 * and reuse service_time to limit stack usage. */
1644 service_time = at_est2timeout(service_time);
1646 /* We expect other clients to timeout within service_time, then try
1647 * to reconnect, then try the failover server. The max delay between
1648 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1649 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1651 LASSERT(obt->obt_magic == OBT_MAGIC);
1652 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1653 if (service_time > obd->obd_recovery_timeout && !new_client)
1654 extend_recovery_timer(obd, service_time, false);
1657 /** Health checking routines */
1658 static inline int exp_connect_healthy(struct obd_export *exp)
1660 return (exp->exp_in_recovery);
1663 /** if export done req_replay or has replay in queue */
1664 static inline int exp_req_replay_healthy(struct obd_export *exp)
1666 return (!exp->exp_req_replay_needed ||
1667 cfs_atomic_read(&exp->exp_replay_count) > 0);
1669 /** if export done lock_replay or has replay in queue */
1670 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1672 return (!exp->exp_lock_replay_needed ||
1673 cfs_atomic_read(&exp->exp_replay_count) > 0);
1676 static inline int exp_vbr_healthy(struct obd_export *exp)
1678 return (!exp->exp_vbr_failed);
1681 static inline int exp_finished(struct obd_export *exp)
1683 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1686 /** Checking routines for recovery */
1687 static int check_for_clients(struct obd_device *obd)
1689 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1691 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1693 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1694 return (clnts + obd->obd_stale_clients ==
1695 obd->obd_max_recoverable_clients);
1698 static int check_for_next_transno(struct obd_device *obd)
1700 struct ptlrpc_request *req = NULL;
1701 int wake_up = 0, connected, completed, queue_len;
1702 __u64 next_transno, req_transno;
1705 spin_lock(&obd->obd_recovery_task_lock);
1706 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1707 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1708 struct ptlrpc_request, rq_list);
1709 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1714 connected = cfs_atomic_read(&obd->obd_connected_clients);
1715 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1716 queue_len = obd->obd_requests_queued_for_recovery;
1717 next_transno = obd->obd_next_recovery_transno;
1719 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1720 "req_transno: "LPU64", next_transno: "LPU64"\n",
1721 obd->obd_max_recoverable_clients, connected, completed,
1722 queue_len, req_transno, next_transno);
1724 if (obd->obd_abort_recovery) {
1725 CDEBUG(D_HA, "waking for aborted recovery\n");
1727 } else if (obd->obd_recovery_expired) {
1728 CDEBUG(D_HA, "waking for expired recovery\n");
1730 } else if (req_transno == next_transno) {
1731 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1733 } else if (queue_len > 0 &&
1734 queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1736 /** handle gaps occured due to lost reply or VBR */
1737 LASSERTF(req_transno >= next_transno,
1738 "req_transno: "LPU64", next_transno: "LPU64"\n",
1739 req_transno, next_transno);
1740 if (req_transno > obd->obd_last_committed &&
1741 !obd->obd_version_recov)
1744 "%s: waking for gap in transno, VBR is %s (skip: "
1745 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1746 ", last_committed: "LPD64")\n",
1747 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1748 next_transno, queue_len, completed, connected,
1749 req_transno, obd->obd_last_committed);
1750 obd->obd_next_recovery_transno = req_transno;
1752 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1753 CDEBUG(D_HA, "waking for completed recovery\n");
1755 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1756 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1757 " by fail_lock, waking up ("LPD64")\n", next_transno);
1758 obd->obd_next_recovery_transno = req_transno;
1761 spin_unlock(&obd->obd_recovery_task_lock);
1765 static int check_for_next_lock(struct obd_device *obd)
1769 spin_lock(&obd->obd_recovery_task_lock);
1770 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1771 CDEBUG(D_HA, "waking for next lock\n");
1773 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1774 CDEBUG(D_HA, "waking for completed lock replay\n");
1776 } else if (obd->obd_abort_recovery) {
1777 CDEBUG(D_HA, "waking for aborted recovery\n");
1779 } else if (obd->obd_recovery_expired) {
1780 CDEBUG(D_HA, "waking for expired recovery\n");
1783 spin_unlock(&obd->obd_recovery_task_lock);
1789 * wait for recovery events,
1790 * check its status with help of check_routine
1791 * evict dead clients via health_check
1793 static int target_recovery_overseer(struct obd_device *obd,
1794 int (*check_routine)(struct obd_device *),
1795 int (*health_check)(struct obd_export *))
1798 wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1799 if (obd->obd_abort_recovery) {
1800 CWARN("recovery is aborted, evict exports in recovery\n");
1801 /** evict exports which didn't finish recovery yet */
1802 class_disconnect_stale_exports(obd, exp_finished);
1804 } else if (obd->obd_recovery_expired) {
1805 obd->obd_recovery_expired = 0;
1806 /** If some clients died being recovered, evict them */
1807 LCONSOLE_WARN("%s: recovery is timed out, "
1808 "evict stale exports\n", obd->obd_name);
1809 /** evict cexports with no replay in queue, they are stalled */
1810 class_disconnect_stale_exports(obd, health_check);
1811 /** continue with VBR */
1812 spin_lock(&obd->obd_dev_lock);
1813 obd->obd_version_recov = 1;
1814 spin_unlock(&obd->obd_dev_lock);
1816 * reset timer, recovery will proceed with versions now,
1817 * timeout is set just to handle reconnection delays
1819 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1820 /** Wait for recovery events again, after evicting bad clients */
1826 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1828 struct ptlrpc_request *req = NULL;
1831 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1832 obd->obd_next_recovery_transno);
1834 if (target_recovery_overseer(obd, check_for_next_transno,
1835 exp_req_replay_healthy)) {
1836 abort_req_replay_queue(obd);
1837 abort_lock_replay_queue(obd);
1840 spin_lock(&obd->obd_recovery_task_lock);
1841 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1842 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1843 struct ptlrpc_request, rq_list);
1844 cfs_list_del_init(&req->rq_list);
1845 obd->obd_requests_queued_for_recovery--;
1846 spin_unlock(&obd->obd_recovery_task_lock);
1848 spin_unlock(&obd->obd_recovery_task_lock);
1849 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1850 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1851 /** evict exports failed VBR */
1852 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1857 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1859 struct ptlrpc_request *req = NULL;
1861 CDEBUG(D_HA, "Waiting for lock\n");
1862 if (target_recovery_overseer(obd, check_for_next_lock,
1863 exp_lock_replay_healthy))
1864 abort_lock_replay_queue(obd);
1866 spin_lock(&obd->obd_recovery_task_lock);
1867 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1868 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1869 struct ptlrpc_request, rq_list);
1870 cfs_list_del_init(&req->rq_list);
1871 spin_unlock(&obd->obd_recovery_task_lock);
1873 spin_unlock(&obd->obd_recovery_task_lock);
1874 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1875 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1876 /** evict exports failed VBR */
1877 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1882 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1884 struct ptlrpc_request *req = NULL;
1886 spin_lock(&obd->obd_recovery_task_lock);
1887 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1888 req = cfs_list_entry(obd->obd_final_req_queue.next,
1889 struct ptlrpc_request, rq_list);
1890 cfs_list_del_init(&req->rq_list);
1891 spin_unlock(&obd->obd_recovery_task_lock);
1892 if (req->rq_export->exp_in_recovery) {
1893 spin_lock(&req->rq_export->exp_lock);
1894 req->rq_export->exp_in_recovery = 0;
1895 spin_unlock(&req->rq_export->exp_lock);
1898 spin_unlock(&obd->obd_recovery_task_lock);
1903 static int handle_recovery_req(struct ptlrpc_thread *thread,
1904 struct ptlrpc_request *req,
1905 svc_handler_t handler)
1911 * export can be evicted during recovery, no need to handle replays for
1912 * it after that, discard such request silently
1914 if (req->rq_export->exp_disconnected)
1915 GOTO(reqcopy_put, rc = 0);
1917 rc = lu_context_init(&req->rq_recov_session, LCT_SERVER_SESSION);
1919 CERROR("Failure to initialize session: %d\n", rc);
1920 GOTO(reqcopy_put, rc);
1923 req->rq_recov_session.lc_thread = thread;
1924 lu_context_enter(&req->rq_recov_session);
1925 req->rq_svc_thread = thread;
1926 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1928 /* thread context */
1929 lu_context_enter(&thread->t_env->le_ctx);
1931 lu_context_exit(&thread->t_env->le_ctx);
1933 lu_context_exit(&req->rq_recov_session);
1934 lu_context_fini(&req->rq_recov_session);
1935 /* don't reset timer for final stage */
1936 if (!exp_finished(req->rq_export)) {
1937 int to = obd_timeout;
1940 * Add request timeout to the recovery time so next request from
1941 * this client may come in recovery time
1944 struct ptlrpc_service_part *svcpt;
1946 svcpt = req->rq_rqbd->rqbd_svcpt;
1947 /* If the server sent early reply for this request,
1948 * the client will recalculate the timeout according to
1949 * current server estimate service time, so we will
1950 * use the maxium timeout here for waiting the client
1951 * sending the next req */
1952 to = max((int)at_est2timeout(
1953 at_get(&svcpt->scp_at_estimate)),
1954 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1955 /* Add 2 net_latency, one for balance rq_deadline
1956 * (see ptl_send_rpc), one for resend the req to server,
1957 * Note: client will pack net_latency in replay req
1958 * (see ptlrpc_replay_req) */
1959 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
1961 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1967 static int target_recovery_thread(void *arg)
1969 struct lu_target *lut = arg;
1970 struct obd_device *obd = lut->lut_obd;
1971 struct ptlrpc_request *req;
1972 struct target_recovery_data *trd = &obd->obd_recovery_data;
1973 unsigned long delta;
1975 struct ptlrpc_thread *thread = NULL;
1979 unshare_fs_struct();
1980 OBD_ALLOC_PTR(thread);
1986 OBD_FREE_PTR(thread);
1990 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
1992 OBD_FREE_PTR(thread);
1997 thread->t_env = env;
1998 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1999 env->le_ctx.lc_thread = thread;
2000 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
2001 thread->t_watchdog = NULL;
2003 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2005 trd->trd_processing_task = current_pid();
2007 spin_lock(&obd->obd_dev_lock);
2008 obd->obd_recovering = 1;
2009 spin_unlock(&obd->obd_dev_lock);
2010 complete(&trd->trd_starting);
2012 /* first of all, we have to know the first transno to replay */
2013 if (target_recovery_overseer(obd, check_for_clients,
2014 exp_connect_healthy)) {
2015 abort_req_replay_queue(obd);
2016 abort_lock_replay_queue(obd);
2019 /* next stage: replay requests */
2021 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
2022 cfs_atomic_read(&obd->obd_req_replay_clients),
2023 obd->obd_next_recovery_transno);
2024 while ((req = target_next_replay_req(obd))) {
2025 LASSERT(trd->trd_processing_task == current_pid());
2026 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
2027 lustre_msg_get_transno(req->rq_reqmsg),
2028 libcfs_nid2str(req->rq_peer.nid));
2029 handle_recovery_req(thread, req,
2030 trd->trd_recovery_handler);
2032 * bz18031: increase next_recovery_transno before
2033 * target_request_copy_put() will drop exp_rpc reference
2035 spin_lock(&obd->obd_recovery_task_lock);
2036 obd->obd_next_recovery_transno++;
2037 spin_unlock(&obd->obd_recovery_task_lock);
2038 target_exp_dequeue_req_replay(req);
2039 target_request_copy_put(req);
2040 obd->obd_replayed_requests++;
2044 * The second stage: replay locks
2046 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2047 cfs_atomic_read(&obd->obd_lock_replay_clients));
2048 while ((req = target_next_replay_lock(obd))) {
2049 LASSERT(trd->trd_processing_task == current_pid());
2050 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2051 libcfs_nid2str(req->rq_peer.nid));
2052 handle_recovery_req(thread, req,
2053 trd->trd_recovery_handler);
2054 target_request_copy_put(req);
2055 obd->obd_replayed_locks++;
2059 * The third stage: reply on final pings, at this moment all clients
2060 * must have request in final queue
2062 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2063 /** Update server last boot epoch */
2064 tgt_boot_epoch_update(lut);
2065 /* We drop recoverying flag to forward all new requests
2066 * to regular mds_handle() since now */
2067 spin_lock(&obd->obd_dev_lock);
2068 obd->obd_recovering = obd->obd_abort_recovery = 0;
2069 spin_unlock(&obd->obd_dev_lock);
2070 spin_lock(&obd->obd_recovery_task_lock);
2071 target_cancel_recovery_timer(obd);
2072 spin_unlock(&obd->obd_recovery_task_lock);
2073 while ((req = target_next_final_ping(obd))) {
2074 LASSERT(trd->trd_processing_task == current_pid());
2075 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2076 libcfs_nid2str(req->rq_peer.nid));
2077 handle_recovery_req(thread, req,
2078 trd->trd_recovery_handler);
2079 target_request_copy_put(req);
2082 delta = (jiffies - delta) / HZ;
2083 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2084 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2085 if (delta > OBD_RECOVERY_TIME_SOFT) {
2086 CWARN("too long recovery - read logs\n");
2087 libcfs_debug_dumplog();
2090 target_finish_recovery(obd);
2092 lu_context_fini(&env->le_ctx);
2093 trd->trd_processing_task = 0;
2094 complete(&trd->trd_finishing);
2096 tgt_io_thread_done(thread);
2097 OBD_FREE_PTR(thread);
2102 static int target_start_recovery_thread(struct lu_target *lut,
2103 svc_handler_t handler)
2105 struct obd_device *obd = lut->lut_obd;
2107 struct target_recovery_data *trd = &obd->obd_recovery_data;
2109 memset(trd, 0, sizeof(*trd));
2110 init_completion(&trd->trd_starting);
2111 init_completion(&trd->trd_finishing);
2112 trd->trd_recovery_handler = handler;
2114 if (!IS_ERR(kthread_run(target_recovery_thread,
2115 lut, "tgt_recov"))) {
2116 wait_for_completion(&trd->trd_starting);
2117 LASSERT(obd->obd_recovering != 0);
2125 void target_stop_recovery_thread(struct obd_device *obd)
2127 if (obd->obd_recovery_data.trd_processing_task > 0) {
2128 struct target_recovery_data *trd = &obd->obd_recovery_data;
2129 /** recovery can be done but postrecovery is not yet */
2130 spin_lock(&obd->obd_dev_lock);
2131 if (obd->obd_recovering) {
2132 CERROR("%s: Aborting recovery\n", obd->obd_name);
2133 obd->obd_abort_recovery = 1;
2134 wake_up(&obd->obd_next_transno_waitq);
2136 spin_unlock(&obd->obd_dev_lock);
2137 wait_for_completion(&trd->trd_finishing);
2140 EXPORT_SYMBOL(target_stop_recovery_thread);
2142 void target_recovery_fini(struct obd_device *obd)
2144 class_disconnect_exports(obd);
2145 target_stop_recovery_thread(obd);
2146 target_cleanup_recovery(obd);
2148 EXPORT_SYMBOL(target_recovery_fini);
2150 static void target_recovery_expired(unsigned long castmeharder)
2152 struct obd_device *obd = (struct obd_device *)castmeharder;
2153 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2154 " after %lds (%d clients connected)\n",
2155 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2156 cfs_time_current_sec()- obd->obd_recovery_start,
2157 cfs_atomic_read(&obd->obd_connected_clients));
2159 obd->obd_recovery_expired = 1;
2160 wake_up(&obd->obd_next_transno_waitq);
2163 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2165 struct obd_device *obd = lut->lut_obd;
2166 if (obd->obd_max_recoverable_clients == 0) {
2167 /** Update server last boot epoch */
2168 tgt_boot_epoch_update(lut);
2172 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2173 "last_transno "LPU64"\n", obd->obd_name,
2174 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2175 LASSERT(obd->obd_stopping == 0);
2176 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2177 obd->obd_recovery_start = 0;
2178 obd->obd_recovery_end = 0;
2180 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2181 target_start_recovery_thread(lut, handler);
2183 EXPORT_SYMBOL(target_recovery_init);
2185 #endif /* __KERNEL__ */
2187 static int target_process_req_flags(struct obd_device *obd,
2188 struct ptlrpc_request *req)
2190 struct obd_export *exp = req->rq_export;
2191 LASSERT(exp != NULL);
2192 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2193 /* client declares he's ready to replay locks */
2194 spin_lock(&exp->exp_lock);
2195 if (exp->exp_req_replay_needed) {
2196 exp->exp_req_replay_needed = 0;
2197 spin_unlock(&exp->exp_lock);
2199 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2200 cfs_atomic_dec(&obd->obd_req_replay_clients);
2202 spin_unlock(&exp->exp_lock);
2205 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2206 /* client declares he's ready to complete recovery
2207 * so, we put the request on th final queue */
2208 spin_lock(&exp->exp_lock);
2209 if (exp->exp_lock_replay_needed) {
2210 exp->exp_lock_replay_needed = 0;
2211 spin_unlock(&exp->exp_lock);
2213 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2214 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2216 spin_unlock(&exp->exp_lock);
2222 int target_queue_recovery_request(struct ptlrpc_request *req,
2223 struct obd_device *obd)
2227 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2230 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2231 /* Processing the queue right now, don't re-add. */
2235 target_process_req_flags(obd, req);
2237 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2238 /* client declares he's ready to complete recovery
2239 * so, we put the request on th final queue */
2240 target_request_copy_get(req);
2241 DEBUG_REQ(D_HA, req, "queue final req");
2242 wake_up(&obd->obd_next_transno_waitq);
2243 spin_lock(&obd->obd_recovery_task_lock);
2244 if (obd->obd_recovering) {
2245 cfs_list_add_tail(&req->rq_list,
2246 &obd->obd_final_req_queue);
2248 spin_unlock(&obd->obd_recovery_task_lock);
2249 target_request_copy_put(req);
2250 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2252 spin_unlock(&obd->obd_recovery_task_lock);
2255 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2256 /* client declares he's ready to replay locks */
2257 target_request_copy_get(req);
2258 DEBUG_REQ(D_HA, req, "queue lock replay req");
2259 wake_up(&obd->obd_next_transno_waitq);
2260 spin_lock(&obd->obd_recovery_task_lock);
2261 LASSERT(obd->obd_recovering);
2262 /* usually due to recovery abort */
2263 if (!req->rq_export->exp_in_recovery) {
2264 spin_unlock(&obd->obd_recovery_task_lock);
2265 target_request_copy_put(req);
2268 LASSERT(req->rq_export->exp_lock_replay_needed);
2269 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2270 spin_unlock(&obd->obd_recovery_task_lock);
2274 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2275 * (i.e. buflens etc are in my own byte order), but type-dependent
2276 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2279 CFS_INIT_LIST_HEAD(&req->rq_list);
2280 DEBUG_REQ(D_HA, req, "not queueing");
2284 /* If we're processing the queue, we want don't want to queue this
2287 * Also, if this request has a transno less than the one we're waiting
2288 * for, we should process it now. It could (and currently always will)
2289 * be an open request for a descriptor that was opened some time ago.
2291 * Also, a resent, replayed request that has already been
2292 * handled will pass through here and be processed immediately.
2294 CDEBUG(D_HA, "Next recovery transno: "LPU64
2295 ", current: "LPU64", replaying\n",
2296 obd->obd_next_recovery_transno, transno);
2297 spin_lock(&obd->obd_recovery_task_lock);
2298 if (transno < obd->obd_next_recovery_transno) {
2299 /* Processing the queue right now, don't re-add. */
2300 LASSERT(cfs_list_empty(&req->rq_list));
2301 spin_unlock(&obd->obd_recovery_task_lock);
2304 spin_unlock(&obd->obd_recovery_task_lock);
2306 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2309 target_request_copy_get(req);
2310 if (!req->rq_export->exp_in_recovery) {
2311 target_request_copy_put(req);
2314 LASSERT(req->rq_export->exp_req_replay_needed);
2316 if (target_exp_enqueue_req_replay(req)) {
2317 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2318 target_request_copy_put(req);
2323 spin_lock(&obd->obd_recovery_task_lock);
2324 LASSERT(obd->obd_recovering);
2325 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2326 struct ptlrpc_request *reqiter =
2327 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2329 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2330 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2335 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2337 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2338 "has been claimed by another client");
2339 spin_unlock(&obd->obd_recovery_task_lock);
2340 target_exp_dequeue_req_replay(req);
2341 target_request_copy_put(req);
2347 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2349 obd->obd_requests_queued_for_recovery++;
2350 spin_unlock(&obd->obd_recovery_task_lock);
2351 wake_up(&obd->obd_next_transno_waitq);
2354 EXPORT_SYMBOL(target_queue_recovery_request);
2356 int target_handle_ping(struct ptlrpc_request *req)
2358 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2359 return req_capsule_server_pack(&req->rq_pill);
2361 EXPORT_SYMBOL(target_handle_ping);
2363 void target_committed_to_req(struct ptlrpc_request *req)
2365 struct obd_export *exp = req->rq_export;
2367 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2368 lustre_msg_set_last_committed(req->rq_repmsg,
2369 exp->exp_last_committed);
2371 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2372 "%d)", exp->exp_obd->obd_no_transno,
2373 req->rq_repmsg == NULL);
2375 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2376 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2378 EXPORT_SYMBOL(target_committed_to_req);
2380 #endif /* HAVE_SERVER_SUPPORT */
2383 * Packs current SLV and Limit into \a req.
2385 int target_pack_pool_reply(struct ptlrpc_request *req)
2387 struct obd_device *obd;
2390 /* Check that we still have all structures alive as this may
2391 * be some late RPC at shutdown time. */
2392 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2393 !exp_connect_lru_resize(req->rq_export))) {
2394 lustre_msg_set_slv(req->rq_repmsg, 0);
2395 lustre_msg_set_limit(req->rq_repmsg, 0);
2399 /* OBD is alive here as export is alive, which we checked above. */
2400 obd = req->rq_export->exp_obd;
2402 read_lock(&obd->obd_pool_lock);
2403 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2404 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2405 read_unlock(&obd->obd_pool_lock);
2409 EXPORT_SYMBOL(target_pack_pool_reply);
2411 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2413 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2414 DEBUG_REQ(D_ERROR, req, "dropping reply");
2419 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2420 req->rq_status = rc;
2421 return (ptlrpc_send_error(req, 1));
2423 DEBUG_REQ(D_NET, req, "sending reply");
2426 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2429 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2431 struct ptlrpc_service_part *svcpt;
2433 struct ptlrpc_reply_state *rs;
2434 struct obd_export *exp;
2437 if (req->rq_no_reply) {
2442 svcpt = req->rq_rqbd->rqbd_svcpt;
2443 rs = req->rq_reply_state;
2444 if (rs == NULL || !rs->rs_difficult) {
2446 target_send_reply_msg (req, rc, fail_id);
2451 /* must be an export if locks saved */
2452 LASSERT (req->rq_export != NULL);
2453 /* req/reply consistent */
2454 LASSERT(rs->rs_svcpt == svcpt);
2457 LASSERT (!rs->rs_scheduled);
2458 LASSERT (!rs->rs_scheduled_ever);
2459 LASSERT (!rs->rs_handled);
2460 LASSERT (!rs->rs_on_net);
2461 LASSERT (rs->rs_export == NULL);
2462 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2463 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2465 exp = class_export_get (req->rq_export);
2467 /* disable reply scheduling while I'm setting up */
2468 rs->rs_scheduled = 1;
2470 rs->rs_xid = req->rq_xid;
2471 rs->rs_transno = req->rq_transno;
2472 rs->rs_export = exp;
2473 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2475 spin_lock(&exp->exp_uncommitted_replies_lock);
2476 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2477 rs->rs_transno, exp->exp_last_committed);
2478 if (rs->rs_transno > exp->exp_last_committed) {
2479 /* not committed already */
2480 cfs_list_add_tail(&rs->rs_obd_list,
2481 &exp->exp_uncommitted_replies);
2483 spin_unlock(&exp->exp_uncommitted_replies_lock);
2485 spin_lock(&exp->exp_lock);
2486 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2487 spin_unlock(&exp->exp_lock);
2489 netrc = target_send_reply_msg(req, rc, fail_id);
2491 spin_lock(&svcpt->scp_rep_lock);
2493 cfs_atomic_inc(&svcpt->scp_nreps_difficult);
2496 /* error sending: reply is off the net. Also we need +1
2497 * reply ref until ptlrpc_handle_rs() is done
2498 * with the reply state (if the send was successful, there
2499 * would have been +1 ref for the net, which
2500 * reply_out_callback leaves alone) */
2502 ptlrpc_rs_addref(rs);
2505 spin_lock(&rs->rs_lock);
2506 if (rs->rs_transno <= exp->exp_last_committed ||
2507 (!rs->rs_on_net && !rs->rs_no_ack) ||
2508 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2509 cfs_list_empty(&rs->rs_obd_list)) {
2510 CDEBUG(D_HA, "Schedule reply immediately\n");
2511 ptlrpc_dispatch_difficult_reply(rs);
2513 cfs_list_add(&rs->rs_list, &svcpt->scp_rep_active);
2514 rs->rs_scheduled = 0; /* allow notifier to schedule */
2516 spin_unlock(&rs->rs_lock);
2517 spin_unlock(&svcpt->scp_rep_lock);
2520 EXPORT_SYMBOL(target_send_reply);
2522 ldlm_mode_t lck_compat_array[] = {
2523 [LCK_EX] LCK_COMPAT_EX,
2524 [LCK_PW] LCK_COMPAT_PW,
2525 [LCK_PR] LCK_COMPAT_PR,
2526 [LCK_CW] LCK_COMPAT_CW,
2527 [LCK_CR] LCK_COMPAT_CR,
2528 [LCK_NL] LCK_COMPAT_NL,
2529 [LCK_GROUP] LCK_COMPAT_GROUP,
2530 [LCK_COS] LCK_COMPAT_COS,
2534 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2535 * not escape to the user level.
2537 int ldlm_error2errno(ldlm_error_t error)
2545 case ELDLM_LOCK_CHANGED:
2548 case ELDLM_LOCK_ABORTED:
2551 case ELDLM_LOCK_REPLACED:
2554 case ELDLM_NO_LOCK_DATA:
2557 case ELDLM_NAMESPACE_EXISTS:
2560 case ELDLM_BAD_NAMESPACE:
2564 if (((int)error) < 0) /* cast to signed type */
2565 result = error; /* as ldlm_error_t can be unsigned */
2567 CERROR("Invalid DLM result code: %d\n", error);
2573 EXPORT_SYMBOL(ldlm_error2errno);
2576 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2578 ldlm_error_t ldlm_errno2error(int err_no)
2587 error = ELDLM_LOCK_CHANGED;
2590 error = ELDLM_LOCK_ABORTED;
2593 error = ELDLM_LOCK_REPLACED;
2596 error = ELDLM_NO_LOCK_DATA;
2599 error = ELDLM_NAMESPACE_EXISTS;
2602 error = ELDLM_BAD_NAMESPACE;
2609 EXPORT_SYMBOL(ldlm_errno2error);
2611 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2612 void ldlm_dump_export_locks(struct obd_export *exp)
2614 spin_lock(&exp->exp_locks_list_guard);
2615 if (!cfs_list_empty(&exp->exp_locks_list)) {
2616 struct ldlm_lock *lock;
2618 CERROR("dumping locks for export %p,"
2619 "ignore if the unmount doesn't hang\n", exp);
2620 cfs_list_for_each_entry(lock, &exp->exp_locks_list,
2622 LDLM_ERROR(lock, "lock:");
2624 spin_unlock(&exp->exp_locks_list_guard);
2628 #ifdef HAVE_SERVER_SUPPORT
2629 static int target_bulk_timeout(void *data)
2632 /* We don't fail the connection here, because having the export
2633 * killed makes the (vital) call to commitrw very sad.
2638 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2640 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2643 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2644 struct l_wait_info *lwi)
2646 struct ptlrpc_request *req = desc->bd_req;
2650 /* If there is eviction in progress, wait for it to finish. */
2651 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2652 *lwi = LWI_INTR(NULL, NULL);
2653 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2654 !cfs_atomic_read(&exp->exp_obd->
2655 obd_evict_inprogress),
2659 /* Check if client was evicted or tried to reconnect already. */
2660 if (exp->exp_failed || exp->exp_abort_active_req) {
2663 if (desc->bd_type == BULK_PUT_SINK)
2664 rc = sptlrpc_svc_wrap_bulk(req, desc);
2666 rc = ptlrpc_start_bulk_transfer(desc);
2669 if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2670 ptlrpc_abort_bulk(desc);
2671 } else if (rc == 0) {
2672 time_t start = cfs_time_current_sec();
2674 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2675 cfs_duration_t timeout = timeoutl <= 0 ?
2676 CFS_TICK : cfs_time_seconds(timeoutl);
2677 *lwi = LWI_TIMEOUT_INTERVAL(timeout,
2678 cfs_time_seconds(1),
2679 target_bulk_timeout,
2681 rc = l_wait_event(desc->bd_waitq,
2682 !ptlrpc_server_bulk_active(desc) ||
2684 exp->exp_abort_active_req,
2686 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2687 /* Wait again if we changed deadline. */
2688 } while ((rc == -ETIMEDOUT) &&
2689 (req->rq_deadline > cfs_time_current_sec()));
2691 if (rc == -ETIMEDOUT) {
2692 DEBUG_REQ(D_ERROR, req,
2693 "timeout on bulk %s after %ld%+lds",
2695 req->rq_deadline - start,
2696 cfs_time_current_sec() -
2698 ptlrpc_abort_bulk(desc);
2699 } else if (exp->exp_failed) {
2700 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2703 ptlrpc_abort_bulk(desc);
2704 } else if (exp->exp_abort_active_req) {
2705 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2707 /* We don't reply anyway. */
2709 ptlrpc_abort_bulk(desc);
2710 } else if (desc->bd_failure ||
2711 desc->bd_nob_transferred != desc->bd_nob) {
2712 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2714 "network error on" : "truncated",
2716 desc->bd_nob_transferred,
2718 /* XXX Should this be a different errno? */
2720 } else if (desc->bd_type == BULK_GET_SINK) {
2721 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2724 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2725 bulk2type(desc), rc);
2730 EXPORT_SYMBOL(target_bulk_io);
2732 #endif /* HAVE_SERVER_SUPPORT */