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 LASSERT(obddev->u.cli.cl_import == NULL);
486 EXPORT_SYMBOL(client_obd_cleanup);
488 /* ->o_connect() method for client side (OSC and MDC and MGC) */
489 int client_connect_import(const struct lu_env *env,
490 struct obd_export **exp,
491 struct obd_device *obd, struct obd_uuid *cluuid,
492 struct obd_connect_data *data, void *localdata)
494 struct client_obd *cli = &obd->u.cli;
495 struct obd_import *imp = cli->cl_import;
496 struct obd_connect_data *ocd;
497 struct lustre_handle conn = { 0 };
502 down_write(&cli->cl_sem);
503 if (cli->cl_conn_count > 0 )
504 GOTO(out_sem, rc = -EALREADY);
506 rc = class_connect(&conn, obd, cluuid);
510 cli->cl_conn_count++;
511 *exp = class_conn2export(&conn);
513 LASSERT(obd->obd_namespace);
515 imp->imp_dlm_handle = conn;
516 rc = ptlrpc_init_import(imp);
520 ocd = &imp->imp_connect_data;
523 imp->imp_connect_flags_orig = data->ocd_connect_flags;
526 rc = ptlrpc_connect_import(imp);
528 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
531 LASSERT((*exp)->exp_connection);
534 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
535 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
536 data->ocd_connect_flags, ocd->ocd_connect_flags);
537 data->ocd_connect_flags = ocd->ocd_connect_flags;
540 ptlrpc_pinger_add_import(imp);
546 cli->cl_conn_count--;
547 class_disconnect(*exp);
551 up_write(&cli->cl_sem);
555 EXPORT_SYMBOL(client_connect_import);
557 int client_disconnect_export(struct obd_export *exp)
559 struct obd_device *obd = class_exp2obd(exp);
560 struct client_obd *cli;
561 struct obd_import *imp;
566 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
567 exp, exp ? exp->exp_handle.h_cookie : -1);
572 imp = cli->cl_import;
574 down_write(&cli->cl_sem);
575 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
578 if (!cli->cl_conn_count) {
579 CERROR("disconnecting disconnected device (%s)\n",
581 GOTO(out_disconnect, rc = -EINVAL);
584 cli->cl_conn_count--;
585 if (cli->cl_conn_count)
586 GOTO(out_disconnect, rc = 0);
588 /* Mark import deactivated now, so we don't try to reconnect if any
589 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
590 * fully deactivate the import, or that would drop all requests. */
591 spin_lock(&imp->imp_lock);
592 imp->imp_deactive = 1;
593 spin_unlock(&imp->imp_lock);
595 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
596 * delete it regardless. (It's safe to delete an import that was
598 (void)ptlrpc_pinger_del_import(imp);
600 if (obd->obd_namespace != NULL) {
601 /* obd_force == local only */
602 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
603 obd->obd_force ? LCF_LOCAL : 0, NULL);
604 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
607 /* There's no need to hold sem while disconnecting an import,
608 * and it may actually cause deadlock in GSS. */
609 up_write(&cli->cl_sem);
610 rc = ptlrpc_disconnect_import(imp, 0);
611 down_write(&cli->cl_sem);
613 ptlrpc_invalidate_import(imp);
618 /* Use server style - class_disconnect should be always called for
620 err = class_disconnect(exp);
624 up_write(&cli->cl_sem);
628 EXPORT_SYMBOL(client_disconnect_export);
630 #ifdef HAVE_SERVER_SUPPORT
631 int server_disconnect_export(struct obd_export *exp)
636 /* Disconnect early so that clients can't keep using export. */
637 rc = class_disconnect(exp);
638 /* Close import to avoid sending any requests. */
639 if (exp->exp_imp_reverse)
640 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
642 if (exp->exp_obd->obd_namespace != NULL)
643 ldlm_cancel_locks_for_export(exp);
645 /* complete all outstanding replies */
646 spin_lock(&exp->exp_lock);
647 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
648 struct ptlrpc_reply_state *rs =
649 cfs_list_entry(exp->exp_outstanding_replies.next,
650 struct ptlrpc_reply_state, rs_exp_list);
651 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
653 spin_lock(&svcpt->scp_rep_lock);
655 cfs_list_del_init(&rs->rs_exp_list);
656 spin_lock(&rs->rs_lock);
657 ptlrpc_schedule_difficult_reply(rs);
658 spin_unlock(&rs->rs_lock);
660 spin_unlock(&svcpt->scp_rep_lock);
662 spin_unlock(&exp->exp_lock);
666 EXPORT_SYMBOL(server_disconnect_export);
668 /* --------------------------------------------------------------------------
669 * from old lib/target.c
670 * -------------------------------------------------------------------------- */
672 static int target_handle_reconnect(struct lustre_handle *conn,
673 struct obd_export *exp,
674 struct obd_uuid *cluuid)
678 if (exp->exp_connection && exp->exp_imp_reverse) {
679 struct lustre_handle *hdl;
680 struct obd_device *target;
682 hdl = &exp->exp_imp_reverse->imp_remote_handle;
683 target = exp->exp_obd;
685 /* Might be a re-connect after a partition. */
686 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
687 if (target->obd_recovering) {
688 int timeout = cfs_duration_sec(cfs_time_sub(
690 &target->obd_recovery_timer),
691 cfs_time_current()));
693 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
694 "ing, waiting for %d clients in recov"
695 "ery for %d:%.02d\n", target->obd_name,
696 obd_uuid2str(&exp->exp_client_uuid),
697 obd_export_nid2str(exp),
698 target->obd_max_recoverable_clients,
699 timeout / 60, timeout % 60);
701 LCONSOLE_WARN("%s: Client %s (at %s) "
702 "reconnecting\n", target->obd_name,
703 obd_uuid2str(&exp->exp_client_uuid),
704 obd_export_nid2str(exp));
707 conn->cookie = exp->exp_handle.h_cookie;
708 /* target_handle_connect() treats EALREADY and
709 * -EALREADY differently. EALREADY means we are
710 * doing a valid reconnect from the same client. */
713 LCONSOLE_WARN("%s: already connected client %s (at %s) "
714 "with handle "LPX64". Rejecting client "
715 "with the same UUID trying to reconnect "
716 "with handle "LPX64"\n", target->obd_name,
717 obd_uuid2str(&exp->exp_client_uuid),
718 obd_export_nid2str(exp),
719 hdl->cookie, conn->cookie);
720 memset(conn, 0, sizeof *conn);
721 /* target_handle_connect() treats EALREADY and
722 * -EALREADY differently. -EALREADY is an error
723 * (same UUID, different handle). */
728 conn->cookie = exp->exp_handle.h_cookie;
729 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
730 cluuid->uuid, exp, conn->cookie);
734 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
737 struct obd_export *exp = cb_data;
739 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
740 obd->obd_name, exp->exp_client_uuid.uuid);
742 spin_lock(&exp->exp_lock);
743 exp->exp_need_sync = 0;
744 spin_unlock(&exp->exp_lock);
745 class_export_cb_put(exp);
747 EXPORT_SYMBOL(target_client_add_cb);
751 check_and_start_recovery_timer(struct obd_device *obd,
752 struct ptlrpc_request *req, int new_client);
755 check_and_start_recovery_timer(struct obd_device *obd,
756 struct ptlrpc_request *req, int new_client)
761 int target_handle_connect(struct ptlrpc_request *req)
763 struct obd_device *target = NULL, *targref = NULL;
764 struct obd_export *export = NULL;
765 struct obd_import *revimp;
766 struct obd_import *tmp_imp = NULL;
767 struct lustre_handle conn;
768 struct lustre_handle *tmp;
769 struct obd_uuid tgtuuid;
770 struct obd_uuid cluuid;
771 struct obd_uuid remote_uuid;
776 bool mds_conn = false, lw_client = false;
777 struct obd_connect_data *data, *tmpdata;
779 lnet_nid_t *client_nid = NULL;
782 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
784 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
786 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
787 GOTO(out, rc = -EINVAL);
790 obd_str2uuid(&tgtuuid, str);
791 target = class_uuid2obd(&tgtuuid);
793 target = class_name2obd(str);
796 deuuidify(str, NULL, &target_start, &target_len);
797 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
798 "from %s (no target). If you are running "
799 "an HA pair check that the target is "
800 "mounted on the other server.\n", str,
801 libcfs_nid2str(req->rq_peer.nid));
802 GOTO(out, rc = -ENODEV);
805 spin_lock(&target->obd_dev_lock);
806 if (target->obd_stopping || !target->obd_set_up) {
807 spin_unlock(&target->obd_dev_lock);
809 deuuidify(str, NULL, &target_start, &target_len);
810 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
811 target_len, target_start,
812 libcfs_nid2str(req->rq_peer.nid),
813 (target->obd_stopping ?
814 "stopping" : "not set up"));
815 GOTO(out, rc = -ENODEV);
818 if (target->obd_no_conn) {
819 spin_unlock(&target->obd_dev_lock);
821 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
822 "from %s\n", target->obd_name,
823 libcfs_nid2str(req->rq_peer.nid));
824 GOTO(out, rc = -EAGAIN);
827 /* Make sure the target isn't cleaned up while we're here. Yes,
828 * there's still a race between the above check and our incref here.
829 * Really, class_uuid2obd should take the ref. */
830 targref = class_incref(target, __FUNCTION__, current);
832 target->obd_conn_inprogress++;
833 spin_unlock(&target->obd_dev_lock);
835 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
837 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
838 GOTO(out, rc = -EINVAL);
841 obd_str2uuid(&cluuid, str);
843 /* XXX Extract a nettype and format accordingly. */
844 switch (sizeof(lnet_nid_t)) {
845 /* NB the casts only avoid compiler warnings. */
847 snprintf(remote_uuid.uuid, sizeof remote_uuid,
848 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
851 snprintf(remote_uuid.uuid, sizeof remote_uuid,
852 "NET_%x_UUID", (__u32)req->rq_peer.nid);
858 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
860 GOTO(out, rc = -EPROTO);
864 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
866 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
868 GOTO(out, rc = -EPROTO);
870 rc = req_capsule_server_pack(&req->rq_pill);
874 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
875 if (data->ocd_version < LUSTRE_VERSION_CODE -
876 LUSTRE_VERSION_ALLOWED_OFFSET ||
877 data->ocd_version > LUSTRE_VERSION_CODE +
878 LUSTRE_VERSION_ALLOWED_OFFSET) {
879 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
880 "libclient connection attempt",
881 data->ocd_version < LUSTRE_VERSION_CODE ?
883 OBD_OCD_VERSION_MAJOR(data->ocd_version),
884 OBD_OCD_VERSION_MINOR(data->ocd_version),
885 OBD_OCD_VERSION_PATCH(data->ocd_version),
886 OBD_OCD_VERSION_FIX(data->ocd_version));
887 data = req_capsule_server_sized_get(&req->rq_pill,
889 offsetof(typeof(*data), ocd_version) +
890 sizeof(data->ocd_version));
892 data->ocd_connect_flags = OBD_CONNECT_VERSION;
893 data->ocd_version = LUSTRE_VERSION_CODE;
895 GOTO(out, rc = -EPROTO);
899 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
900 (data->ocd_connect_flags & OBD_CONNECT_MDS))
903 if ((data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
906 /* lctl gets a backstage, all-access pass. */
907 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
908 goto dont_check_exports;
910 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
914 /* We've found an export in the hash. */
916 spin_lock(&export->exp_lock);
918 if (export->exp_connecting) { /* bug 9635, et. al. */
919 spin_unlock(&export->exp_lock);
920 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
921 export->exp_obd->obd_name, export,
922 libcfs_nid2str(req->rq_peer.nid));
923 class_export_put(export);
926 } else if (mds_conn && export->exp_connection) {
927 spin_unlock(&export->exp_lock);
928 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
929 /* MDS reconnected after failover. */
930 LCONSOLE_WARN("%s: Received MDS connection from "
931 "%s, removing former export from %s\n",
932 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
933 libcfs_nid2str(export->exp_connection->c_peer.nid));
935 /* New MDS connection from the same NID. */
936 LCONSOLE_WARN("%s: Received new MDS connection from "
937 "%s, removing former export from same NID\n",
938 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
939 class_fail_export(export);
940 class_export_put(export);
943 } else if (export->exp_connection != NULL &&
944 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
945 (lustre_msg_get_op_flags(req->rq_reqmsg) &
946 MSG_CONNECT_INITIAL)) {
947 spin_unlock(&export->exp_lock);
948 /* In MDS failover we have static UUID but NID can change. */
949 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
950 "existing nid %s is already connected\n",
951 target->obd_name, cluuid.uuid,
952 libcfs_nid2str(req->rq_peer.nid),
954 export->exp_connection->c_peer.nid));
956 class_export_put(export);
959 export->exp_connecting = 1;
960 spin_unlock(&export->exp_lock);
961 LASSERT(export->exp_obd == target);
963 rc = target_handle_reconnect(&conn, export, &cluuid);
966 /* If we found an export, we already unlocked. */
969 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
970 } else if (req->rq_export == NULL &&
971 cfs_atomic_read(&export->exp_rpc_count) > 0) {
972 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
973 "still busy with %d references\n",
974 target->obd_name, cluuid.uuid,
975 libcfs_nid2str(req->rq_peer.nid),
976 cfs_atomic_read(&export->exp_refcount));
977 GOTO(out, rc = -EBUSY);
978 } else if (req->rq_export != NULL &&
979 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
980 /* The current connect RPC has increased exp_rpc_count. */
981 LCONSOLE_WARN("%s: Client %s (at %s) refused reconnection, "
982 "still busy with %d active RPCs\n",
983 target->obd_name, cluuid.uuid,
984 libcfs_nid2str(req->rq_peer.nid),
985 cfs_atomic_read(&export->exp_rpc_count) - 1);
986 spin_lock(&export->exp_lock);
987 if (req->rq_export->exp_conn_cnt <
988 lustre_msg_get_conn_cnt(req->rq_reqmsg))
989 /* try to abort active requests */
990 req->rq_export->exp_abort_active_req = 1;
991 spin_unlock(&export->exp_lock);
992 GOTO(out, rc = -EBUSY);
993 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
994 if (!strstr(cluuid.uuid, "mdt"))
995 LCONSOLE_WARN("%s: Rejecting reconnect from the "
996 "known client %s (at %s) because it "
997 "is indicating it is a new client",
998 target->obd_name, cluuid.uuid,
999 libcfs_nid2str(req->rq_peer.nid));
1000 GOTO(out, rc = -EALREADY);
1002 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1009 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
1010 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1011 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1012 export, (long)cfs_time_current_sec(),
1013 export ? (long)export->exp_last_request_time : 0);
1015 /* If this is the first time a client connects, reset the recovery
1016 * timer. Discard lightweight connections which might be local. */
1017 if (!lw_client && rc == 0 && target->obd_recovering)
1018 check_and_start_recovery_timer(target, req, export == NULL);
1020 /* We want to handle EALREADY but *not* -EALREADY from
1021 * target_handle_reconnect(), return reconnection state in a flag. */
1022 if (rc == EALREADY) {
1023 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1029 /* Tell the client if we support replayable requests. */
1030 if (target->obd_replayable)
1031 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1032 client_nid = &req->rq_peer.nid;
1034 if (export == NULL) {
1035 /* allow lightweight connections during recovery */
1036 if (target->obd_recovering && !lw_client) {
1038 int c; /* connected */
1039 int i; /* in progress */
1041 int s; /* stale/evicted */
1043 c = cfs_atomic_read(&target->obd_connected_clients);
1044 i = cfs_atomic_read(&target->obd_lock_replay_clients);
1045 k = target->obd_max_recoverable_clients;
1046 s = target->obd_stale_clients;
1047 t = cfs_timer_deadline(&target->obd_recovery_timer);
1048 t = cfs_time_sub(t, cfs_time_current());
1049 t = cfs_duration_sec(t);
1050 LCONSOLE_WARN("%s: Denying connection for new client "
1051 "%s (at %s), waiting for all %d known "
1052 "clients (%d recovered, %d in progress, "
1053 "and %d evicted) to recover in %d:%.02d\n",
1054 target->obd_name, cluuid.uuid,
1055 libcfs_nid2str(req->rq_peer.nid), k,
1056 c - i, i, s, (int)t / 60,
1061 rc = obd_connect(req->rq_svc_thread->t_env,
1062 &export, target, &cluuid, data,
1064 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1065 lustre_msg_add_op_flags(req->rq_repmsg,
1066 MSG_CONNECT_RECOVERING);
1068 conn.cookie = export->exp_handle.h_cookie;
1071 rc = obd_reconnect(req->rq_svc_thread->t_env,
1072 export, target, &cluuid, data, client_nid);
1077 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 50, 0)
1078 /* 2.2.0 clients always swab nidtbl entries due to a bug, so server
1079 * will do the swabbing for if the client is using the same endianness.
1081 * This fixup is version-limited, because we don't want to carry the
1082 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we need
1083 * interop with unpatched 2.2 clients. For newer clients, servers
1084 * will never do MNE swabbing, let the client handle that. LU-1644 */
1085 export->exp_need_mne_swab = !ptlrpc_req_need_swab(req) &&
1086 !(data->ocd_connect_flags & OBD_CONNECT_MNE_SWAB);
1088 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and exp_need_mne_swab"
1091 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1092 data->ocd_instance = target->u.obt.obt_instance;
1094 /* Return only the parts of obd_connect_data that we understand, so the
1095 * client knows that we don't understand the rest. */
1097 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1099 tmpdata = req_capsule_server_get(&req->rq_pill,
1101 /* Don't use struct assignment here, because the client reply
1102 * buffer may be smaller/larger than the local struct
1103 * obd_connect_data. */
1104 memcpy(tmpdata, data, min(tmpsize, size));
1107 /* If all else goes well, this is our RPC return code. */
1110 lustre_msg_set_handle(req->rq_repmsg, &conn);
1112 /* If the client and the server are the same node, we will already
1113 * have an export that really points to the client's DLM export,
1114 * because we have a shared handles table.
1116 * XXX this will go away when shaver stops sending the "connect" handle
1117 * in the real "remote handle" field of the request --phik 24 Apr 2003
1119 ptlrpc_request_change_export(req, export);
1121 spin_lock(&export->exp_lock);
1122 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1123 spin_unlock(&export->exp_lock);
1124 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1125 "or equal conn_cnt: %d >= %d\n",
1126 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1127 export->exp_conn_cnt,
1128 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1130 GOTO(out, rc = -EALREADY);
1132 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1133 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1134 export->exp_abort_active_req = 0;
1136 /* Don't evict liblustre clients for not pinging. */
1137 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1138 export->exp_libclient = 1;
1139 spin_unlock(&export->exp_lock);
1141 spin_lock(&target->obd_dev_lock);
1142 cfs_list_del_init(&export->exp_obd_chain_timed);
1143 spin_unlock(&target->obd_dev_lock);
1145 spin_unlock(&export->exp_lock);
1148 if (export->exp_connection != NULL) {
1149 /* Check to see if connection came from another NID. */
1150 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1151 !cfs_hlist_unhashed(&export->exp_nid_hash))
1152 cfs_hash_del(export->exp_obd->obd_nid_hash,
1153 &export->exp_connection->c_peer.nid,
1154 &export->exp_nid_hash);
1156 ptlrpc_connection_put(export->exp_connection);
1159 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1162 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1163 cfs_hash_add(export->exp_obd->obd_nid_hash,
1164 &export->exp_connection->c_peer.nid,
1165 &export->exp_nid_hash);
1168 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1170 __u64 transno = data->ocd_transno;
1172 spin_lock(&export->exp_lock);
1173 /* possible race with class_disconnect_stale_exports,
1174 * export may be already in the eviction process */
1175 if (export->exp_failed) {
1176 spin_unlock(&export->exp_lock);
1177 GOTO(out, rc = -ENODEV);
1179 export->exp_in_recovery = 1;
1180 export->exp_req_replay_needed = 1;
1181 export->exp_lock_replay_needed = 1;
1182 spin_unlock(&export->exp_lock);
1184 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1185 MSG_CONNECT_TRANSNO);
1186 if (has_transno && transno == 0)
1187 CWARN("Connect with zero transno!\n");
1189 if (has_transno && transno > 0 &&
1190 transno < target->obd_next_recovery_transno &&
1191 transno > target->obd_last_committed) {
1192 /* Another way is to use cmpxchg() to be lock-free. */
1193 spin_lock(&target->obd_recovery_task_lock);
1194 if (transno < target->obd_next_recovery_transno)
1195 target->obd_next_recovery_transno = transno;
1196 spin_unlock(&target->obd_recovery_task_lock);
1199 cfs_atomic_inc(&target->obd_req_replay_clients);
1200 cfs_atomic_inc(&target->obd_lock_replay_clients);
1201 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1202 target->obd_max_recoverable_clients)
1203 wake_up(&target->obd_next_transno_waitq);
1206 /* Tell the client we're in recovery, when client is involved in it. */
1207 if (target->obd_recovering && !lw_client)
1208 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1210 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1213 /* Return -ENOTCONN in case of errors to let client reconnect. */
1214 revimp = class_new_import(target);
1215 if (revimp == NULL) {
1216 CERROR("fail to alloc new reverse import.\n");
1217 GOTO(out, rc = -ENOTCONN);
1220 spin_lock(&export->exp_lock);
1221 if (export->exp_imp_reverse != NULL)
1222 /* destroyed import can be still referenced in ctxt */
1223 tmp_imp = export->exp_imp_reverse;
1224 export->exp_imp_reverse = revimp;
1225 spin_unlock(&export->exp_lock);
1227 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1228 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1229 revimp->imp_remote_handle = conn;
1230 revimp->imp_dlm_fake = 1;
1231 revimp->imp_state = LUSTRE_IMP_FULL;
1233 /* Unknown versions will be caught in
1234 * ptlrpc_handle_server_req_in->lustre_unpack_msg(). */
1235 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1237 if ((data->ocd_connect_flags & OBD_CONNECT_AT) &&
1238 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1239 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1241 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1243 if ((data->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1244 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1245 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1247 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1249 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1251 CERROR("Failed to get sec for reverse import: %d\n", rc);
1252 spin_lock(&export->exp_lock);
1253 export->exp_imp_reverse = NULL;
1254 spin_unlock(&export->exp_lock);
1255 class_destroy_import(revimp);
1258 class_import_put(revimp);
1261 if (tmp_imp != NULL)
1262 client_destroy_import(tmp_imp);
1264 spin_lock(&export->exp_lock);
1265 export->exp_connecting = 0;
1266 spin_unlock(&export->exp_lock);
1268 class_export_put(export);
1271 spin_lock(&target->obd_dev_lock);
1272 target->obd_conn_inprogress--;
1273 spin_unlock(&target->obd_dev_lock);
1275 class_decref(targref, __func__, current);
1278 req->rq_status = rc;
1281 EXPORT_SYMBOL(target_handle_connect);
1283 int target_handle_disconnect(struct ptlrpc_request *req)
1288 rc = req_capsule_server_pack(&req->rq_pill);
1292 /* Keep the rq_export around so we can send the reply. */
1293 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1297 EXPORT_SYMBOL(target_handle_disconnect);
1299 void target_destroy_export(struct obd_export *exp)
1301 struct obd_import *imp = NULL;
1302 /* exports created from last_rcvd data, and "fake"
1303 exports created by lctl don't have an import */
1304 spin_lock(&exp->exp_lock);
1305 if (exp->exp_imp_reverse != NULL) {
1306 imp = exp->exp_imp_reverse;
1307 exp->exp_imp_reverse = NULL;
1309 spin_unlock(&exp->exp_lock);
1311 client_destroy_import(imp);
1313 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1314 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1315 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1316 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1318 EXPORT_SYMBOL(target_destroy_export);
1321 * Recovery functions
1323 static void target_request_copy_get(struct ptlrpc_request *req)
1325 class_export_rpc_inc(req->rq_export);
1326 LASSERT(cfs_list_empty(&req->rq_list));
1327 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1329 /* Increase refcount to keep request in queue. */
1330 cfs_atomic_inc(&req->rq_refcount);
1331 /* Let export know it has replays to be handled. */
1332 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1335 static void target_request_copy_put(struct ptlrpc_request *req)
1337 LASSERT(cfs_list_empty(&req->rq_replay_list));
1338 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1340 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1341 class_export_rpc_dec(req->rq_export);
1342 ptlrpc_server_drop_request(req);
1345 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1347 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1348 struct obd_export *exp = req->rq_export;
1349 struct ptlrpc_request *reqiter;
1354 spin_lock(&exp->exp_lock);
1355 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1357 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1364 /* We expect it with RESENT and REPLAY flags. */
1365 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1366 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1367 CERROR("invalid flags %x of resent replay\n",
1368 lustre_msg_get_flags(req->rq_reqmsg));
1370 cfs_list_add_tail(&req->rq_replay_list,
1371 &exp->exp_req_replay_queue);
1374 spin_unlock(&exp->exp_lock);
1378 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1380 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1381 LASSERT(req->rq_export);
1383 spin_lock(&req->rq_export->exp_lock);
1384 cfs_list_del_init(&req->rq_replay_list);
1385 spin_unlock(&req->rq_export->exp_lock);
1389 static void target_finish_recovery(struct obd_device *obd)
1393 /* Only log a recovery message when recovery has occurred. */
1394 if (obd->obd_recovery_start) {
1395 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1396 obd->obd_recovery_start);
1397 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1398 "%d recovered and %d %s evicted.\n", obd->obd_name,
1399 (int)elapsed_time / 60, (int)elapsed_time % 60,
1400 obd->obd_max_recoverable_clients,
1401 cfs_atomic_read(&obd->obd_connected_clients),
1402 obd->obd_stale_clients,
1403 obd->obd_stale_clients == 1 ? "was" : "were");
1406 ldlm_reprocess_all_ns(obd->obd_namespace);
1407 spin_lock(&obd->obd_recovery_task_lock);
1408 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1409 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1410 !cfs_list_empty(&obd->obd_final_req_queue)) {
1411 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1413 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1414 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1416 cfs_list_empty(&obd->obd_final_req_queue) ? \
1418 spin_unlock(&obd->obd_recovery_task_lock);
1421 spin_unlock(&obd->obd_recovery_task_lock);
1423 obd->obd_recovery_end = cfs_time_current_sec();
1425 /* When recovery finished, cleanup orphans on MDS and OST. */
1426 if (OBT(obd) && OBP(obd, postrecov)) {
1427 int rc = OBP(obd, postrecov)(obd);
1429 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1435 static void abort_req_replay_queue(struct obd_device *obd)
1437 struct ptlrpc_request *req, *n;
1438 cfs_list_t abort_list;
1440 CFS_INIT_LIST_HEAD(&abort_list);
1441 spin_lock(&obd->obd_recovery_task_lock);
1442 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1443 spin_unlock(&obd->obd_recovery_task_lock);
1444 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1445 DEBUG_REQ(D_WARNING, req, "aborted:");
1446 req->rq_status = -ENOTCONN;
1447 if (ptlrpc_error(req)) {
1448 DEBUG_REQ(D_ERROR, req,
1449 "failed abort_req_reply; skipping");
1451 target_exp_dequeue_req_replay(req);
1452 target_request_copy_put(req);
1456 static void abort_lock_replay_queue(struct obd_device *obd)
1458 struct ptlrpc_request *req, *n;
1459 cfs_list_t abort_list;
1461 CFS_INIT_LIST_HEAD(&abort_list);
1462 spin_lock(&obd->obd_recovery_task_lock);
1463 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1464 spin_unlock(&obd->obd_recovery_task_lock);
1465 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1466 DEBUG_REQ(D_ERROR, req, "aborted:");
1467 req->rq_status = -ENOTCONN;
1468 if (ptlrpc_error(req)) {
1469 DEBUG_REQ(D_ERROR, req,
1470 "failed abort_lock_reply; skipping");
1472 target_request_copy_put(req);
1476 /* Called from a cleanup function if the device is being cleaned up
1477 forcefully. The exports should all have been disconnected already,
1478 the only thing left to do is
1479 - clear the recovery flags
1481 - free queued requests and replies, but don't send replies
1482 Because the obd_stopping flag is set, no new requests should be received.
1485 void target_cleanup_recovery(struct obd_device *obd)
1487 struct ptlrpc_request *req, *n;
1488 cfs_list_t clean_list;
1491 CFS_INIT_LIST_HEAD(&clean_list);
1492 spin_lock(&obd->obd_dev_lock);
1493 if (!obd->obd_recovering) {
1494 spin_unlock(&obd->obd_dev_lock);
1498 obd->obd_recovering = obd->obd_abort_recovery = 0;
1499 spin_unlock(&obd->obd_dev_lock);
1501 spin_lock(&obd->obd_recovery_task_lock);
1502 target_cancel_recovery_timer(obd);
1503 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1504 spin_unlock(&obd->obd_recovery_task_lock);
1506 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1507 LASSERT(req->rq_reply_state == 0);
1508 target_exp_dequeue_req_replay(req);
1509 target_request_copy_put(req);
1512 spin_lock(&obd->obd_recovery_task_lock);
1513 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1514 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1515 spin_unlock(&obd->obd_recovery_task_lock);
1517 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1518 LASSERT(req->rq_reply_state == 0);
1519 target_request_copy_put(req);
1524 EXPORT_SYMBOL(target_cleanup_recovery);
1526 /* obd_recovery_task_lock should be held */
1527 void target_cancel_recovery_timer(struct obd_device *obd)
1529 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1530 cfs_timer_disarm(&obd->obd_recovery_timer);
1532 EXPORT_SYMBOL(target_cancel_recovery_timer);
1534 static void target_start_recovery_timer(struct obd_device *obd)
1536 if (obd->obd_recovery_start != 0)
1539 spin_lock(&obd->obd_dev_lock);
1540 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1541 spin_unlock(&obd->obd_dev_lock);
1545 LASSERT(obd->obd_recovery_timeout != 0);
1547 if (obd->obd_recovery_start != 0) {
1548 spin_unlock(&obd->obd_dev_lock);
1552 cfs_timer_arm(&obd->obd_recovery_timer,
1553 cfs_time_shift(obd->obd_recovery_timeout));
1554 obd->obd_recovery_start = cfs_time_current_sec();
1555 spin_unlock(&obd->obd_dev_lock);
1557 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1558 "or until %d client%s reconnect%s\n",
1560 obd->obd_recovery_timeout / 60,
1561 obd->obd_recovery_timeout % 60,
1562 obd->obd_max_recoverable_clients,
1563 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1564 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1568 * extend recovery window.
1570 * if @extend is true, extend recovery window to have @drt remaining at least;
1571 * otherwise, make sure the recovery timeout value is not less than @drt.
1573 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1577 cfs_duration_t left;
1580 spin_lock(&obd->obd_dev_lock);
1581 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1582 spin_unlock(&obd->obd_dev_lock);
1585 LASSERT(obd->obd_recovery_start != 0);
1587 now = cfs_time_current_sec();
1588 to = obd->obd_recovery_timeout;
1589 end = obd->obd_recovery_start + to;
1590 left = cfs_time_sub(end, now);
1592 if (extend && (drt > left)) {
1594 } else if (!extend && (drt > to)) {
1596 /* reduce drt by already passed time */
1597 drt -= obd->obd_recovery_timeout - left;
1600 if (to > obd->obd_recovery_time_hard)
1601 to = obd->obd_recovery_time_hard;
1602 if (obd->obd_recovery_timeout < to ||
1603 obd->obd_recovery_timeout == obd->obd_recovery_time_hard) {
1604 obd->obd_recovery_timeout = to;
1605 cfs_timer_arm(&obd->obd_recovery_timer,
1606 cfs_time_shift(drt));
1608 spin_unlock(&obd->obd_dev_lock);
1610 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1611 obd->obd_name, (unsigned)drt);
1614 /* Reset the timer with each new client connection */
1616 * This timer is actually reconnect_timer, which is for making sure
1617 * the total recovery window is at least as big as my reconnect
1618 * attempt timing. So the initial recovery time_out will be set to
1619 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1620 * from client is bigger than this, then the recovery time_out will
1621 * be extended to make sure the client could be reconnected, in the
1622 * process, the timeout from the new client should be ignored.
1626 check_and_start_recovery_timer(struct obd_device *obd,
1627 struct ptlrpc_request *req,
1630 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1631 struct obd_device_target *obt = &obd->u.obt;
1633 if (!new_client && service_time)
1634 /* Teach server about old server's estimates, as first guess
1635 * at how long new requests will take. */
1636 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1639 target_start_recovery_timer(obd);
1641 /* Convert the service time to RPC timeout,
1642 * and reuse service_time to limit stack usage. */
1643 service_time = at_est2timeout(service_time);
1645 /* We expect other clients to timeout within service_time, then try
1646 * to reconnect, then try the failover server. The max delay between
1647 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1648 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1650 LASSERT(obt->obt_magic == OBT_MAGIC);
1651 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1652 if (service_time > obd->obd_recovery_timeout && !new_client)
1653 extend_recovery_timer(obd, service_time, false);
1656 /** Health checking routines */
1657 static inline int exp_connect_healthy(struct obd_export *exp)
1659 return (exp->exp_in_recovery);
1662 /** if export done req_replay or has replay in queue */
1663 static inline int exp_req_replay_healthy(struct obd_export *exp)
1665 return (!exp->exp_req_replay_needed ||
1666 cfs_atomic_read(&exp->exp_replay_count) > 0);
1668 /** if export done lock_replay or has replay in queue */
1669 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1671 return (!exp->exp_lock_replay_needed ||
1672 cfs_atomic_read(&exp->exp_replay_count) > 0);
1675 static inline int exp_vbr_healthy(struct obd_export *exp)
1677 return (!exp->exp_vbr_failed);
1680 static inline int exp_finished(struct obd_export *exp)
1682 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1685 /** Checking routines for recovery */
1686 static int check_for_clients(struct obd_device *obd)
1688 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1690 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1692 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1693 return (clnts + obd->obd_stale_clients ==
1694 obd->obd_max_recoverable_clients);
1697 static int check_for_next_transno(struct obd_device *obd)
1699 struct ptlrpc_request *req = NULL;
1700 int wake_up = 0, connected, completed, queue_len;
1701 __u64 next_transno, req_transno;
1704 spin_lock(&obd->obd_recovery_task_lock);
1705 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1706 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1707 struct ptlrpc_request, rq_list);
1708 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1713 connected = cfs_atomic_read(&obd->obd_connected_clients);
1714 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1715 queue_len = obd->obd_requests_queued_for_recovery;
1716 next_transno = obd->obd_next_recovery_transno;
1718 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1719 "req_transno: "LPU64", next_transno: "LPU64"\n",
1720 obd->obd_max_recoverable_clients, connected, completed,
1721 queue_len, req_transno, next_transno);
1723 if (obd->obd_abort_recovery) {
1724 CDEBUG(D_HA, "waking for aborted recovery\n");
1726 } else if (obd->obd_recovery_expired) {
1727 CDEBUG(D_HA, "waking for expired recovery\n");
1729 } else if (req_transno == next_transno) {
1730 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1732 } else if (queue_len > 0 &&
1733 queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1735 /** handle gaps occured due to lost reply or VBR */
1736 LASSERTF(req_transno >= next_transno,
1737 "req_transno: "LPU64", next_transno: "LPU64"\n",
1738 req_transno, next_transno);
1739 if (req_transno > obd->obd_last_committed &&
1740 !obd->obd_version_recov)
1743 "%s: waking for gap in transno, VBR is %s (skip: "
1744 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1745 ", last_committed: "LPD64")\n",
1746 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1747 next_transno, queue_len, completed, connected,
1748 req_transno, obd->obd_last_committed);
1749 obd->obd_next_recovery_transno = req_transno;
1751 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1752 CDEBUG(D_HA, "waking for completed recovery\n");
1754 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1755 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1756 " by fail_lock, waking up ("LPD64")\n", next_transno);
1757 obd->obd_next_recovery_transno = req_transno;
1760 spin_unlock(&obd->obd_recovery_task_lock);
1764 static int check_for_next_lock(struct obd_device *obd)
1768 spin_lock(&obd->obd_recovery_task_lock);
1769 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1770 CDEBUG(D_HA, "waking for next lock\n");
1772 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1773 CDEBUG(D_HA, "waking for completed lock replay\n");
1775 } else if (obd->obd_abort_recovery) {
1776 CDEBUG(D_HA, "waking for aborted recovery\n");
1778 } else if (obd->obd_recovery_expired) {
1779 CDEBUG(D_HA, "waking for expired recovery\n");
1782 spin_unlock(&obd->obd_recovery_task_lock);
1788 * wait for recovery events,
1789 * check its status with help of check_routine
1790 * evict dead clients via health_check
1792 static int target_recovery_overseer(struct obd_device *obd,
1793 int (*check_routine)(struct obd_device *),
1794 int (*health_check)(struct obd_export *))
1797 wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1798 if (obd->obd_abort_recovery) {
1799 CWARN("recovery is aborted, evict exports in recovery\n");
1800 /** evict exports which didn't finish recovery yet */
1801 class_disconnect_stale_exports(obd, exp_finished);
1803 } else if (obd->obd_recovery_expired) {
1804 obd->obd_recovery_expired = 0;
1805 /** If some clients died being recovered, evict them */
1806 LCONSOLE_WARN("%s: recovery is timed out, "
1807 "evict stale exports\n", obd->obd_name);
1808 /** evict cexports with no replay in queue, they are stalled */
1809 class_disconnect_stale_exports(obd, health_check);
1810 /** continue with VBR */
1811 spin_lock(&obd->obd_dev_lock);
1812 obd->obd_version_recov = 1;
1813 spin_unlock(&obd->obd_dev_lock);
1815 * reset timer, recovery will proceed with versions now,
1816 * timeout is set just to handle reconnection delays
1818 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1819 /** Wait for recovery events again, after evicting bad clients */
1825 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1827 struct ptlrpc_request *req = NULL;
1830 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1831 obd->obd_next_recovery_transno);
1833 if (target_recovery_overseer(obd, check_for_next_transno,
1834 exp_req_replay_healthy)) {
1835 abort_req_replay_queue(obd);
1836 abort_lock_replay_queue(obd);
1839 spin_lock(&obd->obd_recovery_task_lock);
1840 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1841 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1842 struct ptlrpc_request, rq_list);
1843 cfs_list_del_init(&req->rq_list);
1844 obd->obd_requests_queued_for_recovery--;
1845 spin_unlock(&obd->obd_recovery_task_lock);
1847 spin_unlock(&obd->obd_recovery_task_lock);
1848 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1849 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1850 /** evict exports failed VBR */
1851 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1856 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1858 struct ptlrpc_request *req = NULL;
1860 CDEBUG(D_HA, "Waiting for lock\n");
1861 if (target_recovery_overseer(obd, check_for_next_lock,
1862 exp_lock_replay_healthy))
1863 abort_lock_replay_queue(obd);
1865 spin_lock(&obd->obd_recovery_task_lock);
1866 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1867 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1868 struct ptlrpc_request, rq_list);
1869 cfs_list_del_init(&req->rq_list);
1870 spin_unlock(&obd->obd_recovery_task_lock);
1872 spin_unlock(&obd->obd_recovery_task_lock);
1873 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1874 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1875 /** evict exports failed VBR */
1876 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1881 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1883 struct ptlrpc_request *req = NULL;
1885 spin_lock(&obd->obd_recovery_task_lock);
1886 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1887 req = cfs_list_entry(obd->obd_final_req_queue.next,
1888 struct ptlrpc_request, rq_list);
1889 cfs_list_del_init(&req->rq_list);
1890 spin_unlock(&obd->obd_recovery_task_lock);
1891 if (req->rq_export->exp_in_recovery) {
1892 spin_lock(&req->rq_export->exp_lock);
1893 req->rq_export->exp_in_recovery = 0;
1894 spin_unlock(&req->rq_export->exp_lock);
1897 spin_unlock(&obd->obd_recovery_task_lock);
1902 static int handle_recovery_req(struct ptlrpc_thread *thread,
1903 struct ptlrpc_request *req,
1904 svc_handler_t handler)
1910 * export can be evicted during recovery, no need to handle replays for
1911 * it after that, discard such request silently
1913 if (req->rq_export->exp_disconnected)
1914 GOTO(reqcopy_put, rc = 0);
1916 rc = lu_context_init(&req->rq_recov_session, LCT_SERVER_SESSION);
1918 CERROR("Failure to initialize session: %d\n", rc);
1919 GOTO(reqcopy_put, rc);
1922 req->rq_recov_session.lc_thread = thread;
1923 lu_context_enter(&req->rq_recov_session);
1924 req->rq_svc_thread = thread;
1925 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1927 /* thread context */
1928 lu_context_enter(&thread->t_env->le_ctx);
1930 lu_context_exit(&thread->t_env->le_ctx);
1932 lu_context_exit(&req->rq_recov_session);
1933 lu_context_fini(&req->rq_recov_session);
1934 /* don't reset timer for final stage */
1935 if (!exp_finished(req->rq_export)) {
1936 int to = obd_timeout;
1939 * Add request timeout to the recovery time so next request from
1940 * this client may come in recovery time
1943 struct ptlrpc_service_part *svcpt;
1945 svcpt = req->rq_rqbd->rqbd_svcpt;
1946 /* If the server sent early reply for this request,
1947 * the client will recalculate the timeout according to
1948 * current server estimate service time, so we will
1949 * use the maxium timeout here for waiting the client
1950 * sending the next req */
1951 to = max((int)at_est2timeout(
1952 at_get(&svcpt->scp_at_estimate)),
1953 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1954 /* Add 2 net_latency, one for balance rq_deadline
1955 * (see ptl_send_rpc), one for resend the req to server,
1956 * Note: client will pack net_latency in replay req
1957 * (see ptlrpc_replay_req) */
1958 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
1960 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1966 static int target_recovery_thread(void *arg)
1968 struct lu_target *lut = arg;
1969 struct obd_device *obd = lut->lut_obd;
1970 struct ptlrpc_request *req;
1971 struct target_recovery_data *trd = &obd->obd_recovery_data;
1972 unsigned long delta;
1974 struct ptlrpc_thread *thread = NULL;
1978 unshare_fs_struct();
1979 OBD_ALLOC_PTR(thread);
1985 OBD_FREE_PTR(thread);
1989 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
1991 OBD_FREE_PTR(thread);
1996 thread->t_env = env;
1997 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1998 env->le_ctx.lc_thread = thread;
1999 thread->t_data = NULL;
2000 thread->t_watchdog = NULL;
2002 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2004 trd->trd_processing_task = current_pid();
2006 spin_lock(&obd->obd_dev_lock);
2007 obd->obd_recovering = 1;
2008 spin_unlock(&obd->obd_dev_lock);
2009 complete(&trd->trd_starting);
2011 /* first of all, we have to know the first transno to replay */
2012 if (target_recovery_overseer(obd, check_for_clients,
2013 exp_connect_healthy)) {
2014 abort_req_replay_queue(obd);
2015 abort_lock_replay_queue(obd);
2018 /* next stage: replay requests */
2020 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
2021 cfs_atomic_read(&obd->obd_req_replay_clients),
2022 obd->obd_next_recovery_transno);
2023 while ((req = target_next_replay_req(obd))) {
2024 LASSERT(trd->trd_processing_task == current_pid());
2025 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
2026 lustre_msg_get_transno(req->rq_reqmsg),
2027 libcfs_nid2str(req->rq_peer.nid));
2028 handle_recovery_req(thread, req,
2029 trd->trd_recovery_handler);
2031 * bz18031: increase next_recovery_transno before
2032 * target_request_copy_put() will drop exp_rpc reference
2034 spin_lock(&obd->obd_recovery_task_lock);
2035 obd->obd_next_recovery_transno++;
2036 spin_unlock(&obd->obd_recovery_task_lock);
2037 target_exp_dequeue_req_replay(req);
2038 target_request_copy_put(req);
2039 obd->obd_replayed_requests++;
2043 * The second stage: replay locks
2045 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2046 cfs_atomic_read(&obd->obd_lock_replay_clients));
2047 while ((req = target_next_replay_lock(obd))) {
2048 LASSERT(trd->trd_processing_task == current_pid());
2049 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2050 libcfs_nid2str(req->rq_peer.nid));
2051 handle_recovery_req(thread, req,
2052 trd->trd_recovery_handler);
2053 target_request_copy_put(req);
2054 obd->obd_replayed_locks++;
2058 * The third stage: reply on final pings, at this moment all clients
2059 * must have request in final queue
2061 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2062 /** Update server last boot epoch */
2063 tgt_boot_epoch_update(lut);
2064 /* We drop recoverying flag to forward all new requests
2065 * to regular mds_handle() since now */
2066 spin_lock(&obd->obd_dev_lock);
2067 obd->obd_recovering = obd->obd_abort_recovery = 0;
2068 spin_unlock(&obd->obd_dev_lock);
2069 spin_lock(&obd->obd_recovery_task_lock);
2070 target_cancel_recovery_timer(obd);
2071 spin_unlock(&obd->obd_recovery_task_lock);
2072 while ((req = target_next_final_ping(obd))) {
2073 LASSERT(trd->trd_processing_task == current_pid());
2074 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2075 libcfs_nid2str(req->rq_peer.nid));
2076 handle_recovery_req(thread, req,
2077 trd->trd_recovery_handler);
2078 target_request_copy_put(req);
2081 delta = (jiffies - delta) / HZ;
2082 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2083 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2084 if (delta > OBD_RECOVERY_TIME_SOFT) {
2085 CWARN("too long recovery - read logs\n");
2086 libcfs_debug_dumplog();
2089 target_finish_recovery(obd);
2091 lu_context_fini(&env->le_ctx);
2092 trd->trd_processing_task = 0;
2093 complete(&trd->trd_finishing);
2095 OBD_FREE_PTR(thread);
2100 static int target_start_recovery_thread(struct lu_target *lut,
2101 svc_handler_t handler)
2103 struct obd_device *obd = lut->lut_obd;
2105 struct target_recovery_data *trd = &obd->obd_recovery_data;
2107 memset(trd, 0, sizeof(*trd));
2108 init_completion(&trd->trd_starting);
2109 init_completion(&trd->trd_finishing);
2110 trd->trd_recovery_handler = handler;
2112 if (!IS_ERR(kthread_run(target_recovery_thread,
2113 lut, "tgt_recov"))) {
2114 wait_for_completion(&trd->trd_starting);
2115 LASSERT(obd->obd_recovering != 0);
2123 void target_stop_recovery_thread(struct obd_device *obd)
2125 if (obd->obd_recovery_data.trd_processing_task > 0) {
2126 struct target_recovery_data *trd = &obd->obd_recovery_data;
2127 /** recovery can be done but postrecovery is not yet */
2128 spin_lock(&obd->obd_dev_lock);
2129 if (obd->obd_recovering) {
2130 CERROR("%s: Aborting recovery\n", obd->obd_name);
2131 obd->obd_abort_recovery = 1;
2132 wake_up(&obd->obd_next_transno_waitq);
2134 spin_unlock(&obd->obd_dev_lock);
2135 wait_for_completion(&trd->trd_finishing);
2138 EXPORT_SYMBOL(target_stop_recovery_thread);
2140 void target_recovery_fini(struct obd_device *obd)
2142 class_disconnect_exports(obd);
2143 target_stop_recovery_thread(obd);
2144 target_cleanup_recovery(obd);
2146 EXPORT_SYMBOL(target_recovery_fini);
2148 static void target_recovery_expired(unsigned long castmeharder)
2150 struct obd_device *obd = (struct obd_device *)castmeharder;
2151 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2152 " after %lds (%d clients connected)\n",
2153 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2154 cfs_time_current_sec()- obd->obd_recovery_start,
2155 cfs_atomic_read(&obd->obd_connected_clients));
2157 obd->obd_recovery_expired = 1;
2158 wake_up(&obd->obd_next_transno_waitq);
2161 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2163 struct obd_device *obd = lut->lut_obd;
2164 if (obd->obd_max_recoverable_clients == 0) {
2165 /** Update server last boot epoch */
2166 tgt_boot_epoch_update(lut);
2170 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2171 "last_transno "LPU64"\n", obd->obd_name,
2172 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2173 LASSERT(obd->obd_stopping == 0);
2174 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2175 obd->obd_recovery_start = 0;
2176 obd->obd_recovery_end = 0;
2178 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2179 target_start_recovery_thread(lut, handler);
2181 EXPORT_SYMBOL(target_recovery_init);
2183 #endif /* __KERNEL__ */
2185 static int target_process_req_flags(struct obd_device *obd,
2186 struct ptlrpc_request *req)
2188 struct obd_export *exp = req->rq_export;
2189 LASSERT(exp != NULL);
2190 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2191 /* client declares he's ready to replay locks */
2192 spin_lock(&exp->exp_lock);
2193 if (exp->exp_req_replay_needed) {
2194 exp->exp_req_replay_needed = 0;
2195 spin_unlock(&exp->exp_lock);
2197 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2198 cfs_atomic_dec(&obd->obd_req_replay_clients);
2200 spin_unlock(&exp->exp_lock);
2203 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2204 /* client declares he's ready to complete recovery
2205 * so, we put the request on th final queue */
2206 spin_lock(&exp->exp_lock);
2207 if (exp->exp_lock_replay_needed) {
2208 exp->exp_lock_replay_needed = 0;
2209 spin_unlock(&exp->exp_lock);
2211 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2212 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2214 spin_unlock(&exp->exp_lock);
2220 int target_queue_recovery_request(struct ptlrpc_request *req,
2221 struct obd_device *obd)
2225 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2228 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2229 /* Processing the queue right now, don't re-add. */
2233 target_process_req_flags(obd, req);
2235 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2236 /* client declares he's ready to complete recovery
2237 * so, we put the request on th final queue */
2238 target_request_copy_get(req);
2239 DEBUG_REQ(D_HA, req, "queue final req");
2240 wake_up(&obd->obd_next_transno_waitq);
2241 spin_lock(&obd->obd_recovery_task_lock);
2242 if (obd->obd_recovering) {
2243 cfs_list_add_tail(&req->rq_list,
2244 &obd->obd_final_req_queue);
2246 spin_unlock(&obd->obd_recovery_task_lock);
2247 target_request_copy_put(req);
2248 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2250 spin_unlock(&obd->obd_recovery_task_lock);
2253 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2254 /* client declares he's ready to replay locks */
2255 target_request_copy_get(req);
2256 DEBUG_REQ(D_HA, req, "queue lock replay req");
2257 wake_up(&obd->obd_next_transno_waitq);
2258 spin_lock(&obd->obd_recovery_task_lock);
2259 LASSERT(obd->obd_recovering);
2260 /* usually due to recovery abort */
2261 if (!req->rq_export->exp_in_recovery) {
2262 spin_unlock(&obd->obd_recovery_task_lock);
2263 target_request_copy_put(req);
2266 LASSERT(req->rq_export->exp_lock_replay_needed);
2267 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2268 spin_unlock(&obd->obd_recovery_task_lock);
2272 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2273 * (i.e. buflens etc are in my own byte order), but type-dependent
2274 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2277 CFS_INIT_LIST_HEAD(&req->rq_list);
2278 DEBUG_REQ(D_HA, req, "not queueing");
2282 /* If we're processing the queue, we want don't want to queue this
2285 * Also, if this request has a transno less than the one we're waiting
2286 * for, we should process it now. It could (and currently always will)
2287 * be an open request for a descriptor that was opened some time ago.
2289 * Also, a resent, replayed request that has already been
2290 * handled will pass through here and be processed immediately.
2292 CDEBUG(D_HA, "Next recovery transno: "LPU64
2293 ", current: "LPU64", replaying\n",
2294 obd->obd_next_recovery_transno, transno);
2295 spin_lock(&obd->obd_recovery_task_lock);
2296 if (transno < obd->obd_next_recovery_transno) {
2297 /* Processing the queue right now, don't re-add. */
2298 LASSERT(cfs_list_empty(&req->rq_list));
2299 spin_unlock(&obd->obd_recovery_task_lock);
2302 spin_unlock(&obd->obd_recovery_task_lock);
2304 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2307 target_request_copy_get(req);
2308 if (!req->rq_export->exp_in_recovery) {
2309 target_request_copy_put(req);
2312 LASSERT(req->rq_export->exp_req_replay_needed);
2314 if (target_exp_enqueue_req_replay(req)) {
2315 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2316 target_request_copy_put(req);
2321 spin_lock(&obd->obd_recovery_task_lock);
2322 LASSERT(obd->obd_recovering);
2323 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2324 struct ptlrpc_request *reqiter =
2325 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2327 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2328 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2333 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2335 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2336 "has been claimed by another client");
2337 spin_unlock(&obd->obd_recovery_task_lock);
2338 target_exp_dequeue_req_replay(req);
2339 target_request_copy_put(req);
2345 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2347 obd->obd_requests_queued_for_recovery++;
2348 spin_unlock(&obd->obd_recovery_task_lock);
2349 wake_up(&obd->obd_next_transno_waitq);
2352 EXPORT_SYMBOL(target_queue_recovery_request);
2354 int target_handle_ping(struct ptlrpc_request *req)
2356 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2357 return req_capsule_server_pack(&req->rq_pill);
2359 EXPORT_SYMBOL(target_handle_ping);
2361 void target_committed_to_req(struct ptlrpc_request *req)
2363 struct obd_export *exp = req->rq_export;
2365 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2366 lustre_msg_set_last_committed(req->rq_repmsg,
2367 exp->exp_last_committed);
2369 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2370 "%d)", exp->exp_obd->obd_no_transno,
2371 req->rq_repmsg == NULL);
2373 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2374 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2376 EXPORT_SYMBOL(target_committed_to_req);
2378 #endif /* HAVE_SERVER_SUPPORT */
2381 * Packs current SLV and Limit into \a req.
2383 int target_pack_pool_reply(struct ptlrpc_request *req)
2385 struct obd_device *obd;
2388 /* Check that we still have all structures alive as this may
2389 * be some late RPC at shutdown time. */
2390 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2391 !exp_connect_lru_resize(req->rq_export))) {
2392 lustre_msg_set_slv(req->rq_repmsg, 0);
2393 lustre_msg_set_limit(req->rq_repmsg, 0);
2397 /* OBD is alive here as export is alive, which we checked above. */
2398 obd = req->rq_export->exp_obd;
2400 read_lock(&obd->obd_pool_lock);
2401 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2402 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2403 read_unlock(&obd->obd_pool_lock);
2407 EXPORT_SYMBOL(target_pack_pool_reply);
2409 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2411 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2412 DEBUG_REQ(D_ERROR, req, "dropping reply");
2417 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2418 req->rq_status = rc;
2419 return (ptlrpc_send_error(req, 1));
2421 DEBUG_REQ(D_NET, req, "sending reply");
2424 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2427 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2429 struct ptlrpc_service_part *svcpt;
2431 struct ptlrpc_reply_state *rs;
2432 struct obd_export *exp;
2435 if (req->rq_no_reply) {
2440 svcpt = req->rq_rqbd->rqbd_svcpt;
2441 rs = req->rq_reply_state;
2442 if (rs == NULL || !rs->rs_difficult) {
2444 target_send_reply_msg (req, rc, fail_id);
2449 /* must be an export if locks saved */
2450 LASSERT (req->rq_export != NULL);
2451 /* req/reply consistent */
2452 LASSERT(rs->rs_svcpt == svcpt);
2455 LASSERT (!rs->rs_scheduled);
2456 LASSERT (!rs->rs_scheduled_ever);
2457 LASSERT (!rs->rs_handled);
2458 LASSERT (!rs->rs_on_net);
2459 LASSERT (rs->rs_export == NULL);
2460 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2461 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2463 exp = class_export_get (req->rq_export);
2465 /* disable reply scheduling while I'm setting up */
2466 rs->rs_scheduled = 1;
2468 rs->rs_xid = req->rq_xid;
2469 rs->rs_transno = req->rq_transno;
2470 rs->rs_export = exp;
2471 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2473 spin_lock(&exp->exp_uncommitted_replies_lock);
2474 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2475 rs->rs_transno, exp->exp_last_committed);
2476 if (rs->rs_transno > exp->exp_last_committed) {
2477 /* not committed already */
2478 cfs_list_add_tail(&rs->rs_obd_list,
2479 &exp->exp_uncommitted_replies);
2481 spin_unlock(&exp->exp_uncommitted_replies_lock);
2483 spin_lock(&exp->exp_lock);
2484 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2485 spin_unlock(&exp->exp_lock);
2487 netrc = target_send_reply_msg(req, rc, fail_id);
2489 spin_lock(&svcpt->scp_rep_lock);
2491 cfs_atomic_inc(&svcpt->scp_nreps_difficult);
2494 /* error sending: reply is off the net. Also we need +1
2495 * reply ref until ptlrpc_handle_rs() is done
2496 * with the reply state (if the send was successful, there
2497 * would have been +1 ref for the net, which
2498 * reply_out_callback leaves alone) */
2500 ptlrpc_rs_addref(rs);
2503 spin_lock(&rs->rs_lock);
2504 if (rs->rs_transno <= exp->exp_last_committed ||
2505 (!rs->rs_on_net && !rs->rs_no_ack) ||
2506 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2507 cfs_list_empty(&rs->rs_obd_list)) {
2508 CDEBUG(D_HA, "Schedule reply immediately\n");
2509 ptlrpc_dispatch_difficult_reply(rs);
2511 cfs_list_add(&rs->rs_list, &svcpt->scp_rep_active);
2512 rs->rs_scheduled = 0; /* allow notifier to schedule */
2514 spin_unlock(&rs->rs_lock);
2515 spin_unlock(&svcpt->scp_rep_lock);
2518 EXPORT_SYMBOL(target_send_reply);
2520 ldlm_mode_t lck_compat_array[] = {
2521 [LCK_EX] LCK_COMPAT_EX,
2522 [LCK_PW] LCK_COMPAT_PW,
2523 [LCK_PR] LCK_COMPAT_PR,
2524 [LCK_CW] LCK_COMPAT_CW,
2525 [LCK_CR] LCK_COMPAT_CR,
2526 [LCK_NL] LCK_COMPAT_NL,
2527 [LCK_GROUP] LCK_COMPAT_GROUP,
2528 [LCK_COS] LCK_COMPAT_COS,
2532 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2533 * not escape to the user level.
2535 int ldlm_error2errno(ldlm_error_t error)
2543 case ELDLM_LOCK_CHANGED:
2546 case ELDLM_LOCK_ABORTED:
2549 case ELDLM_LOCK_REPLACED:
2552 case ELDLM_NO_LOCK_DATA:
2555 case ELDLM_NAMESPACE_EXISTS:
2558 case ELDLM_BAD_NAMESPACE:
2562 if (((int)error) < 0) /* cast to signed type */
2563 result = error; /* as ldlm_error_t can be unsigned */
2565 CERROR("Invalid DLM result code: %d\n", error);
2571 EXPORT_SYMBOL(ldlm_error2errno);
2574 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2576 ldlm_error_t ldlm_errno2error(int err_no)
2585 error = ELDLM_LOCK_CHANGED;
2588 error = ELDLM_LOCK_ABORTED;
2591 error = ELDLM_LOCK_REPLACED;
2594 error = ELDLM_NO_LOCK_DATA;
2597 error = ELDLM_NAMESPACE_EXISTS;
2600 error = ELDLM_BAD_NAMESPACE;
2607 EXPORT_SYMBOL(ldlm_errno2error);
2609 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2610 void ldlm_dump_export_locks(struct obd_export *exp)
2612 spin_lock(&exp->exp_locks_list_guard);
2613 if (!cfs_list_empty(&exp->exp_locks_list)) {
2614 struct ldlm_lock *lock;
2616 CERROR("dumping locks for export %p,"
2617 "ignore if the unmount doesn't hang\n", exp);
2618 cfs_list_for_each_entry(lock, &exp->exp_locks_list,
2620 LDLM_ERROR(lock, "lock:");
2622 spin_unlock(&exp->exp_locks_list_guard);
2626 #ifdef HAVE_SERVER_SUPPORT
2627 static int target_bulk_timeout(void *data)
2630 /* We don't fail the connection here, because having the export
2631 * killed makes the (vital) call to commitrw very sad.
2636 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2638 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2641 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2642 struct l_wait_info *lwi)
2644 struct ptlrpc_request *req = desc->bd_req;
2648 /* If there is eviction in progress, wait for it to finish. */
2649 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2650 *lwi = LWI_INTR(NULL, NULL);
2651 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2652 !cfs_atomic_read(&exp->exp_obd->
2653 obd_evict_inprogress),
2657 /* Check if client was evicted or tried to reconnect already. */
2658 if (exp->exp_failed || exp->exp_abort_active_req) {
2661 if (desc->bd_type == BULK_PUT_SINK)
2662 rc = sptlrpc_svc_wrap_bulk(req, desc);
2664 rc = ptlrpc_start_bulk_transfer(desc);
2667 if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2668 ptlrpc_abort_bulk(desc);
2669 } else if (rc == 0) {
2670 time_t start = cfs_time_current_sec();
2672 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2673 cfs_duration_t timeout = timeoutl <= 0 ?
2674 CFS_TICK : cfs_time_seconds(timeoutl);
2675 *lwi = LWI_TIMEOUT_INTERVAL(timeout,
2676 cfs_time_seconds(1),
2677 target_bulk_timeout,
2679 rc = l_wait_event(desc->bd_waitq,
2680 !ptlrpc_server_bulk_active(desc) ||
2682 exp->exp_abort_active_req,
2684 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2685 /* Wait again if we changed deadline. */
2686 } while ((rc == -ETIMEDOUT) &&
2687 (req->rq_deadline > cfs_time_current_sec()));
2689 if (rc == -ETIMEDOUT) {
2690 DEBUG_REQ(D_ERROR, req,
2691 "timeout on bulk %s after %ld%+lds",
2693 req->rq_deadline - start,
2694 cfs_time_current_sec() -
2696 ptlrpc_abort_bulk(desc);
2697 } else if (exp->exp_failed) {
2698 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2701 ptlrpc_abort_bulk(desc);
2702 } else if (exp->exp_abort_active_req) {
2703 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2705 /* We don't reply anyway. */
2707 ptlrpc_abort_bulk(desc);
2708 } else if (desc->bd_failure ||
2709 desc->bd_nob_transferred != desc->bd_nob) {
2710 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2712 "network error on" : "truncated",
2714 desc->bd_nob_transferred,
2716 /* XXX Should this be a different errno? */
2718 } else if (desc->bd_type == BULK_GET_SINK) {
2719 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2722 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2723 bulk2type(desc), rc);
2728 EXPORT_SYMBOL(target_bulk_io);
2730 #endif /* HAVE_SERVER_SUPPORT */