4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
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;
275 /* In a more perfect world, we would hang a ptlrpc_client off of
276 * obd_type and just use the values from there. */
277 if (!strcmp(name, LUSTRE_OSC_NAME) ||
278 (!strcmp(name, LUSTRE_OSP_NAME) &&
279 !is_osp_on_ost(lustre_cfg_buf(lcfg, 0)))) {
280 rq_portal = OST_REQUEST_PORTAL;
281 rp_portal = OSC_REPLY_PORTAL;
282 connect_op = OST_CONNECT;
283 cli->cl_sp_me = LUSTRE_SP_CLI;
284 cli->cl_sp_to = LUSTRE_SP_OST;
285 ns_type = LDLM_NS_TYPE_OSC;
287 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
288 (!strcmp(name, LUSTRE_OSP_NAME) &&
289 is_osp_on_ost(lustre_cfg_buf(lcfg, 0)))) {
290 rq_portal = MDS_REQUEST_PORTAL;
291 rp_portal = MDC_REPLY_PORTAL;
292 connect_op = MDS_CONNECT;
293 cli->cl_sp_me = LUSTRE_SP_CLI;
294 cli->cl_sp_to = LUSTRE_SP_MDT;
295 ns_type = LDLM_NS_TYPE_MDC;
297 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
298 rq_portal = MGS_REQUEST_PORTAL;
299 rp_portal = MGC_REPLY_PORTAL;
300 connect_op = MGS_CONNECT;
301 cli->cl_sp_me = LUSTRE_SP_MGC;
302 cli->cl_sp_to = LUSTRE_SP_MGS;
303 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
304 ns_type = LDLM_NS_TYPE_MGC;
306 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
307 rq_portal = OST_REQUEST_PORTAL;
308 rp_portal = OSC_REPLY_PORTAL;
309 connect_op = OST_CONNECT;
310 cli->cl_sp_me = LUSTRE_SP_CLI;
311 cli->cl_sp_to = LUSTRE_SP_OST;
312 ns_type = LDLM_NS_TYPE_OSC;
315 CERROR("unknown client OBD type \"%s\", can't setup\n",
320 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
321 CERROR("requires a TARGET UUID\n");
325 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
326 CERROR("client UUID must be less than 38 characters\n");
330 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
331 CERROR("setup requires a SERVER UUID\n");
335 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
336 CERROR("target UUID must be less than 38 characters\n");
340 init_rwsem(&cli->cl_sem);
341 sema_init(&cli->cl_mgc_sem, 1);
342 cli->cl_conn_count = 0;
343 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
344 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
345 sizeof(server_uuid)));
348 cli->cl_avail_grant = 0;
349 /* FIXME: Should limit this for the sum of all cl_dirty_max. */
350 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
351 if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > cfs_num_physpages / 8)
352 cli->cl_dirty_max = cfs_num_physpages << (CFS_PAGE_SHIFT - 3);
353 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
354 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
355 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
356 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
357 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
358 client_obd_list_lock_init(&cli->cl_loi_list_lock);
359 cfs_atomic_set(&cli->cl_pending_w_pages, 0);
360 cfs_atomic_set(&cli->cl_pending_r_pages, 0);
361 cli->cl_r_in_flight = 0;
362 cli->cl_w_in_flight = 0;
364 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
365 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
366 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
367 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
368 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
369 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
372 CFS_INIT_LIST_HEAD(&cli->cl_lru_osc);
373 cfs_atomic_set(&cli->cl_lru_shrinkers, 0);
374 cfs_atomic_set(&cli->cl_lru_busy, 0);
375 cfs_atomic_set(&cli->cl_lru_in_list, 0);
376 CFS_INIT_LIST_HEAD(&cli->cl_lru_list);
377 client_obd_list_lock_init(&cli->cl_lru_list_lock);
379 cfs_waitq_init(&cli->cl_destroy_waitq);
380 cfs_atomic_set(&cli->cl_destroy_in_flight, 0);
381 #ifdef ENABLE_CHECKSUM
382 /* Turn on checksumming by default. */
383 cli->cl_checksum = 1;
385 * The supported checksum types will be worked out at connect time
386 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
389 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
391 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
393 /* This value may be changed at connect time in
394 ptlrpc_connect_interpret. */
395 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
396 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
398 if (!strcmp(name, LUSTRE_MDC_NAME)) {
399 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
400 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
401 cli->cl_max_rpcs_in_flight = 2;
402 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
403 cli->cl_max_rpcs_in_flight = 3;
404 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
405 cli->cl_max_rpcs_in_flight = 4;
407 if (osc_on_mdt(obddev->obd_name))
408 cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
410 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
414 CERROR("ldlm_get_ref failed: %d\n", rc);
418 ptlrpc_init_client(rq_portal, rp_portal, name,
419 &obddev->obd_ldlm_client);
421 imp = class_new_import(obddev);
423 GOTO(err_ldlm, rc = -ENOENT);
424 imp->imp_client = &obddev->obd_ldlm_client;
425 imp->imp_connect_op = connect_op;
426 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
427 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
428 LUSTRE_CFG_BUFLEN(lcfg, 1));
429 class_import_put(imp);
431 rc = client_import_add_conn(imp, &server_uuid, 1);
433 CERROR("can't add initial connection\n");
434 GOTO(err_import, rc);
437 cli->cl_import = imp;
438 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
439 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
440 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
442 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
443 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
444 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
445 name, obddev->obd_name,
446 cli->cl_target_uuid.uuid);
447 spin_lock(&imp->imp_lock);
448 imp->imp_deactive = 1;
449 spin_unlock(&imp->imp_lock);
453 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
454 LDLM_NAMESPACE_CLIENT,
455 LDLM_NAMESPACE_GREEDY,
457 if (obddev->obd_namespace == NULL) {
458 CERROR("Unable to create client namespace - %s\n",
460 GOTO(err_import, rc = -ENOMEM);
463 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
468 class_destroy_import(imp);
475 EXPORT_SYMBOL(client_obd_setup);
477 int client_obd_cleanup(struct obd_device *obddev)
481 ldlm_namespace_free_post(obddev->obd_namespace);
482 obddev->obd_namespace = NULL;
484 LASSERT(obddev->u.cli.cl_import == NULL);
489 EXPORT_SYMBOL(client_obd_cleanup);
491 /* ->o_connect() method for client side (OSC and MDC and MGC) */
492 int client_connect_import(const struct lu_env *env,
493 struct obd_export **exp,
494 struct obd_device *obd, struct obd_uuid *cluuid,
495 struct obd_connect_data *data, void *localdata)
497 struct client_obd *cli = &obd->u.cli;
498 struct obd_import *imp = cli->cl_import;
499 struct obd_connect_data *ocd;
500 struct lustre_handle conn = { 0 };
505 down_write(&cli->cl_sem);
506 if (cli->cl_conn_count > 0 )
507 GOTO(out_sem, rc = -EALREADY);
509 rc = class_connect(&conn, obd, cluuid);
513 cli->cl_conn_count++;
514 *exp = class_conn2export(&conn);
516 LASSERT(obd->obd_namespace);
518 imp->imp_dlm_handle = conn;
519 rc = ptlrpc_init_import(imp);
523 ocd = &imp->imp_connect_data;
526 imp->imp_connect_flags_orig = data->ocd_connect_flags;
529 rc = ptlrpc_connect_import(imp);
531 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
534 LASSERT((*exp)->exp_connection);
537 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
538 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
539 data->ocd_connect_flags, ocd->ocd_connect_flags);
540 data->ocd_connect_flags = ocd->ocd_connect_flags;
543 ptlrpc_pinger_add_import(imp);
549 cli->cl_conn_count--;
550 class_disconnect(*exp);
554 up_write(&cli->cl_sem);
558 EXPORT_SYMBOL(client_connect_import);
560 int client_disconnect_export(struct obd_export *exp)
562 struct obd_device *obd = class_exp2obd(exp);
563 struct client_obd *cli;
564 struct obd_import *imp;
569 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
570 exp, exp ? exp->exp_handle.h_cookie : -1);
575 imp = cli->cl_import;
577 down_write(&cli->cl_sem);
578 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
581 if (!cli->cl_conn_count) {
582 CERROR("disconnecting disconnected device (%s)\n",
584 GOTO(out_disconnect, rc = -EINVAL);
587 cli->cl_conn_count--;
588 if (cli->cl_conn_count)
589 GOTO(out_disconnect, rc = 0);
591 /* Mark import deactivated now, so we don't try to reconnect if any
592 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
593 * fully deactivate the import, or that would drop all requests. */
594 spin_lock(&imp->imp_lock);
595 imp->imp_deactive = 1;
596 spin_unlock(&imp->imp_lock);
598 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
599 * delete it regardless. (It's safe to delete an import that was
601 (void)ptlrpc_pinger_del_import(imp);
603 if (obd->obd_namespace != NULL) {
604 /* obd_force == local only */
605 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
606 obd->obd_force ? LCF_LOCAL : 0, NULL);
607 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
610 /* There's no need to hold sem while disconnecting an import,
611 * and it may actually cause deadlock in GSS. */
612 up_write(&cli->cl_sem);
613 rc = ptlrpc_disconnect_import(imp, 0);
614 down_write(&cli->cl_sem);
616 ptlrpc_invalidate_import(imp);
621 /* Use server style - class_disconnect should be always called for
623 err = class_disconnect(exp);
627 up_write(&cli->cl_sem);
631 EXPORT_SYMBOL(client_disconnect_export);
633 #ifdef HAVE_SERVER_SUPPORT
634 int server_disconnect_export(struct obd_export *exp)
639 /* Disconnect early so that clients can't keep using export. */
640 rc = class_disconnect(exp);
641 /* Close import to avoid sending any requests. */
642 if (exp->exp_imp_reverse)
643 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
645 if (exp->exp_obd->obd_namespace != NULL)
646 ldlm_cancel_locks_for_export(exp);
648 /* complete all outstanding replies */
649 spin_lock(&exp->exp_lock);
650 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
651 struct ptlrpc_reply_state *rs =
652 cfs_list_entry(exp->exp_outstanding_replies.next,
653 struct ptlrpc_reply_state, rs_exp_list);
654 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
656 spin_lock(&svcpt->scp_rep_lock);
658 cfs_list_del_init(&rs->rs_exp_list);
659 spin_lock(&rs->rs_lock);
660 ptlrpc_schedule_difficult_reply(rs);
661 spin_unlock(&rs->rs_lock);
663 spin_unlock(&svcpt->scp_rep_lock);
665 spin_unlock(&exp->exp_lock);
669 EXPORT_SYMBOL(server_disconnect_export);
671 /* --------------------------------------------------------------------------
672 * from old lib/target.c
673 * -------------------------------------------------------------------------- */
675 static int target_handle_reconnect(struct lustre_handle *conn,
676 struct obd_export *exp,
677 struct obd_uuid *cluuid)
681 if (exp->exp_connection && exp->exp_imp_reverse) {
682 struct lustre_handle *hdl;
683 struct obd_device *target;
685 hdl = &exp->exp_imp_reverse->imp_remote_handle;
686 target = exp->exp_obd;
688 /* Might be a re-connect after a partition. */
689 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
690 if (target->obd_recovering) {
691 int timeout = cfs_duration_sec(cfs_time_sub(
693 &target->obd_recovery_timer),
694 cfs_time_current()));
696 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
697 "ing, waiting for %d clients in recov"
698 "ery for %d:%.02d\n", target->obd_name,
699 obd_uuid2str(&exp->exp_client_uuid),
700 obd_export_nid2str(exp),
701 target->obd_max_recoverable_clients,
702 timeout / 60, timeout % 60);
704 LCONSOLE_WARN("%s: Client %s (at %s) "
705 "reconnecting\n", target->obd_name,
706 obd_uuid2str(&exp->exp_client_uuid),
707 obd_export_nid2str(exp));
710 conn->cookie = exp->exp_handle.h_cookie;
711 /* target_handle_connect() treats EALREADY and
712 * -EALREADY differently. EALREADY means we are
713 * doing a valid reconnect from the same client. */
716 LCONSOLE_WARN("%s: already connected client %s (at %s) "
717 "with handle "LPX64". Rejecting client "
718 "with the same UUID trying to reconnect "
719 "with handle "LPX64"\n", target->obd_name,
720 obd_uuid2str(&exp->exp_client_uuid),
721 obd_export_nid2str(exp),
722 hdl->cookie, conn->cookie);
723 memset(conn, 0, sizeof *conn);
724 /* target_handle_connect() treats EALREADY and
725 * -EALREADY differently. -EALREADY is an error
726 * (same UUID, different handle). */
731 conn->cookie = exp->exp_handle.h_cookie;
732 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
733 cluuid->uuid, exp, conn->cookie);
737 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
740 struct obd_export *exp = cb_data;
742 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
743 obd->obd_name, exp->exp_client_uuid.uuid);
745 spin_lock(&exp->exp_lock);
746 exp->exp_need_sync = 0;
747 spin_unlock(&exp->exp_lock);
748 class_export_cb_put(exp);
750 EXPORT_SYMBOL(target_client_add_cb);
754 check_and_start_recovery_timer(struct obd_device *obd,
755 struct ptlrpc_request *req, int new_client);
758 check_and_start_recovery_timer(struct obd_device *obd,
759 struct ptlrpc_request *req, int new_client)
764 int target_handle_connect(struct ptlrpc_request *req)
766 struct obd_device *target = NULL, *targref = NULL;
767 struct obd_export *export = NULL;
768 struct obd_import *revimp;
769 struct obd_import *tmp_imp = NULL;
770 struct lustre_handle conn;
771 struct lustre_handle *tmp;
772 struct obd_uuid tgtuuid;
773 struct obd_uuid cluuid;
774 struct obd_uuid remote_uuid;
779 bool mds_conn = false, lw_client = false;
780 struct obd_connect_data *data, *tmpdata;
782 lnet_nid_t *client_nid = NULL;
785 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
787 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
789 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
790 GOTO(out, rc = -EINVAL);
793 obd_str2uuid(&tgtuuid, str);
794 target = class_uuid2obd(&tgtuuid);
796 target = class_name2obd(str);
799 deuuidify(str, NULL, &target_start, &target_len);
800 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available for "
801 "connect (no target)\n", str);
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_ERROR_MSG(0x137, "%.*s: Not available for connect "
811 "from %s (%s)\n", 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 LCONSOLE_WARN("%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__, cfs_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) {
876 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
877 "libclient connection attempt");
878 GOTO(out, rc = -EPROTO);
879 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
880 LUSTRE_VERSION_ALLOWED_OFFSET ||
881 data->ocd_version > LUSTRE_VERSION_CODE +
882 LUSTRE_VERSION_ALLOWED_OFFSET) {
883 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
884 "libclient connection attempt",
885 data->ocd_version < LUSTRE_VERSION_CODE ?
887 OBD_OCD_VERSION_MAJOR(data->ocd_version),
888 OBD_OCD_VERSION_MINOR(data->ocd_version),
889 OBD_OCD_VERSION_PATCH(data->ocd_version),
890 OBD_OCD_VERSION_FIX(data->ocd_version));
891 data = req_capsule_server_sized_get(&req->rq_pill,
893 offsetof(typeof(*data), ocd_version) +
894 sizeof(data->ocd_version));
896 data->ocd_connect_flags = OBD_CONNECT_VERSION;
897 data->ocd_version = LUSTRE_VERSION_CODE;
899 GOTO(out, rc = -EPROTO);
903 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
904 (data->ocd_connect_flags & OBD_CONNECT_MDS))
907 if ((data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
910 /* lctl gets a backstage, all-access pass. */
911 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
912 goto dont_check_exports;
914 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
918 /* We've found an export in the hash. */
920 spin_lock(&export->exp_lock);
922 if (export->exp_connecting) { /* bug 9635, et. al. */
923 spin_unlock(&export->exp_lock);
924 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
925 export->exp_obd->obd_name, export,
926 libcfs_nid2str(req->rq_peer.nid));
927 class_export_put(export);
930 } else if (mds_conn && export->exp_connection) {
931 spin_unlock(&export->exp_lock);
932 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
933 /* MDS reconnected after failover. */
934 LCONSOLE_WARN("%s: Received MDS connection from "
935 "%s, removing former export from %s\n",
936 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
937 libcfs_nid2str(export->exp_connection->c_peer.nid));
939 /* New MDS connection from the same NID. */
940 LCONSOLE_WARN("%s: Received new MDS connection from "
941 "%s, removing former export from same NID\n",
942 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
943 class_fail_export(export);
944 class_export_put(export);
947 } else if (export->exp_connection != NULL &&
948 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
949 (lustre_msg_get_op_flags(req->rq_reqmsg) &
950 MSG_CONNECT_INITIAL)) {
951 spin_unlock(&export->exp_lock);
952 /* In MDS failover we have static UUID but NID can change. */
953 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
954 "existing nid %s is already connected\n",
955 target->obd_name, cluuid.uuid,
956 libcfs_nid2str(req->rq_peer.nid),
958 export->exp_connection->c_peer.nid));
960 class_export_put(export);
963 export->exp_connecting = 1;
964 spin_unlock(&export->exp_lock);
965 LASSERT(export->exp_obd == target);
967 rc = target_handle_reconnect(&conn, export, &cluuid);
970 /* If we found an export, we already unlocked. */
973 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
974 } else if (req->rq_export == NULL &&
975 cfs_atomic_read(&export->exp_rpc_count) > 0) {
976 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
977 "still busy with %d references\n",
978 target->obd_name, cluuid.uuid,
979 libcfs_nid2str(req->rq_peer.nid),
980 cfs_atomic_read(&export->exp_refcount));
981 GOTO(out, rc = -EBUSY);
982 } else if (req->rq_export != NULL &&
983 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
984 /* The current connect RPC has increased exp_rpc_count. */
985 LCONSOLE_WARN("%s: Client %s (at %s) refused reconnection, "
986 "still busy with %d active RPCs\n",
987 target->obd_name, cluuid.uuid,
988 libcfs_nid2str(req->rq_peer.nid),
989 cfs_atomic_read(&export->exp_rpc_count) - 1);
990 spin_lock(&export->exp_lock);
991 if (req->rq_export->exp_conn_cnt <
992 lustre_msg_get_conn_cnt(req->rq_reqmsg))
993 /* try to abort active requests */
994 req->rq_export->exp_abort_active_req = 1;
995 spin_unlock(&export->exp_lock);
996 GOTO(out, rc = -EBUSY);
997 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
998 if (!strstr(cluuid.uuid, "mdt"))
999 LCONSOLE_WARN("%s: Rejecting reconnect from the "
1000 "known client %s (at %s) because it "
1001 "is indicating it is a new client",
1002 target->obd_name, cluuid.uuid,
1003 libcfs_nid2str(req->rq_peer.nid));
1004 GOTO(out, rc = -EALREADY);
1006 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1013 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
1014 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1015 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1016 export, (long)cfs_time_current_sec(),
1017 export ? (long)export->exp_last_request_time : 0);
1019 /* If this is the first time a client connects, reset the recovery
1020 * timer. Discard lightweight connections which might be local. */
1021 if (!lw_client && rc == 0 && target->obd_recovering)
1022 check_and_start_recovery_timer(target, req, export == NULL);
1024 /* We want to handle EALREADY but *not* -EALREADY from
1025 * target_handle_reconnect(), return reconnection state in a flag. */
1026 if (rc == EALREADY) {
1027 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1033 /* Tell the client if we support replayable requests. */
1034 if (target->obd_replayable)
1035 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1036 client_nid = &req->rq_peer.nid;
1038 if (export == NULL) {
1039 /* allow lightweight connections during recovery */
1040 if (target->obd_recovering && !lw_client) {
1042 int c; /* connected */
1043 int i; /* in progress */
1046 c = cfs_atomic_read(&target->obd_connected_clients);
1047 i = cfs_atomic_read(&target->obd_lock_replay_clients);
1048 k = target->obd_max_recoverable_clients;
1049 t = cfs_timer_deadline(&target->obd_recovery_timer);
1050 t = cfs_time_sub(t, cfs_time_current());
1051 t = cfs_duration_sec(t);
1052 LCONSOLE_WARN("%s: Denying connection for new client "
1053 "%s (at %s), waiting for all %d known "
1054 "clients (%d recovered, %d in progress, "
1055 "and %d unseen) to recover in %d:%.02d\n",
1056 target->obd_name, cluuid.uuid,
1057 libcfs_nid2str(req->rq_peer.nid), k,
1058 c - i, i, k - c, (int)t / 60,
1063 rc = obd_connect(req->rq_svc_thread->t_env,
1064 &export, target, &cluuid, data,
1067 conn.cookie = export->exp_handle.h_cookie;
1070 rc = obd_reconnect(req->rq_svc_thread->t_env,
1071 export, target, &cluuid, data, client_nid);
1076 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 50, 0)
1077 /* 2.2.0 clients always swab nidtbl entries due to a bug, so server
1078 * will do the swabbing for if the client is using the same endianness.
1080 * This fixup is version-limited, because we don't want to carry the
1081 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we need
1082 * interop with unpatched 2.2 clients. For newer clients, servers
1083 * will never do MNE swabbing, let the client handle that. LU-1644 */
1084 export->exp_need_mne_swab = !ptlrpc_req_need_swab(req) &&
1085 !(data->ocd_connect_flags & OBD_CONNECT_MNE_SWAB);
1087 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and exp_need_mne_swab"
1090 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1091 data->ocd_instance = target->u.obt.obt_instance;
1093 /* Return only the parts of obd_connect_data that we understand, so the
1094 * client knows that we don't understand the rest. */
1096 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1098 tmpdata = req_capsule_server_get(&req->rq_pill,
1100 /* Don't use struct assignment here, because the client reply
1101 * buffer may be smaller/larger than the local struct
1102 * obd_connect_data. */
1103 memcpy(tmpdata, data, min(tmpsize, size));
1106 /* If all else goes well, this is our RPC return code. */
1109 lustre_msg_set_handle(req->rq_repmsg, &conn);
1111 /* If the client and the server are the same node, we will already
1112 * have an export that really points to the client's DLM export,
1113 * because we have a shared handles table.
1115 * XXX this will go away when shaver stops sending the "connect" handle
1116 * in the real "remote handle" field of the request --phik 24 Apr 2003
1118 if (req->rq_export != NULL)
1119 class_export_put(req->rq_export);
1121 /* Request takes one export reference. */
1122 req->rq_export = class_export_get(export);
1124 spin_lock(&export->exp_lock);
1125 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1126 spin_unlock(&export->exp_lock);
1127 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1128 "or equal conn_cnt: %d >= %d\n",
1129 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1130 export->exp_conn_cnt,
1131 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1133 GOTO(out, rc = -EALREADY);
1135 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1136 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1137 export->exp_abort_active_req = 0;
1139 /* Don't evict liblustre clients for not pinging. */
1140 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1141 export->exp_libclient = 1;
1142 spin_unlock(&export->exp_lock);
1144 spin_lock(&target->obd_dev_lock);
1145 cfs_list_del_init(&export->exp_obd_chain_timed);
1146 spin_unlock(&target->obd_dev_lock);
1148 spin_unlock(&export->exp_lock);
1151 if (export->exp_connection != NULL) {
1152 /* Check to see if connection came from another NID. */
1153 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1154 !cfs_hlist_unhashed(&export->exp_nid_hash))
1155 cfs_hash_del(export->exp_obd->obd_nid_hash,
1156 &export->exp_connection->c_peer.nid,
1157 &export->exp_nid_hash);
1159 ptlrpc_connection_put(export->exp_connection);
1162 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1165 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1166 cfs_hash_add(export->exp_obd->obd_nid_hash,
1167 &export->exp_connection->c_peer.nid,
1168 &export->exp_nid_hash);
1171 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1173 __u64 transno = data->ocd_transno;
1175 spin_lock(&export->exp_lock);
1176 /* possible race with class_disconnect_stale_exports,
1177 * export may be already in the eviction process */
1178 if (export->exp_failed) {
1179 spin_unlock(&export->exp_lock);
1180 GOTO(out, rc = -ENODEV);
1182 export->exp_in_recovery = 1;
1183 export->exp_req_replay_needed = 1;
1184 export->exp_lock_replay_needed = 1;
1185 spin_unlock(&export->exp_lock);
1187 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1188 MSG_CONNECT_TRANSNO);
1189 if (has_transno && transno == 0)
1190 CWARN("Connect with zero transno!\n");
1192 if (has_transno && transno > 0 &&
1193 transno < target->obd_next_recovery_transno &&
1194 transno > target->obd_last_committed) {
1195 /* Another way is to use cmpxchg() to be lock-free. */
1196 spin_lock(&target->obd_recovery_task_lock);
1197 if (transno < target->obd_next_recovery_transno)
1198 target->obd_next_recovery_transno = transno;
1199 spin_unlock(&target->obd_recovery_task_lock);
1202 cfs_atomic_inc(&target->obd_req_replay_clients);
1203 cfs_atomic_inc(&target->obd_lock_replay_clients);
1204 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1205 target->obd_max_recoverable_clients)
1206 cfs_waitq_signal(&target->obd_next_transno_waitq);
1209 /* Tell the client we're in recovery, when client is involved in it. */
1210 if (target->obd_recovering && !lw_client)
1211 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1213 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1216 /* Return -ENOTCONN in case of errors to let client reconnect. */
1217 revimp = class_new_import(target);
1218 if (revimp == NULL) {
1219 CERROR("fail to alloc new reverse import.\n");
1220 GOTO(out, rc = -ENOTCONN);
1223 spin_lock(&export->exp_lock);
1224 if (export->exp_imp_reverse != NULL)
1225 /* destroyed import can be still referenced in ctxt */
1226 tmp_imp = export->exp_imp_reverse;
1227 export->exp_imp_reverse = revimp;
1228 spin_unlock(&export->exp_lock);
1230 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1231 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1232 revimp->imp_remote_handle = conn;
1233 revimp->imp_dlm_fake = 1;
1234 revimp->imp_state = LUSTRE_IMP_FULL;
1236 /* Unknown versions will be caught in
1237 * ptlrpc_handle_server_req_in->lustre_unpack_msg(). */
1238 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1240 if ((data->ocd_connect_flags & OBD_CONNECT_AT) &&
1241 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1242 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1244 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1246 if ((data->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1247 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1248 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1250 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1252 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1254 CERROR("Failed to get sec for reverse import: %d\n", rc);
1255 spin_lock(&export->exp_lock);
1256 export->exp_imp_reverse = NULL;
1257 spin_unlock(&export->exp_lock);
1258 class_destroy_import(revimp);
1261 class_import_put(revimp);
1264 if (tmp_imp != NULL)
1265 client_destroy_import(tmp_imp);
1267 spin_lock(&export->exp_lock);
1268 export->exp_connecting = 0;
1269 spin_unlock(&export->exp_lock);
1271 class_export_put(export);
1274 spin_lock(&target->obd_dev_lock);
1275 target->obd_conn_inprogress--;
1276 spin_unlock(&target->obd_dev_lock);
1278 class_decref(targref, __func__, cfs_current());
1281 req->rq_status = rc;
1284 EXPORT_SYMBOL(target_handle_connect);
1286 int target_handle_disconnect(struct ptlrpc_request *req)
1291 rc = req_capsule_server_pack(&req->rq_pill);
1295 /* Keep the rq_export around so we can send the reply. */
1296 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1300 EXPORT_SYMBOL(target_handle_disconnect);
1302 void target_destroy_export(struct obd_export *exp)
1304 struct obd_import *imp = NULL;
1305 /* exports created from last_rcvd data, and "fake"
1306 exports created by lctl don't have an import */
1307 spin_lock(&exp->exp_lock);
1308 if (exp->exp_imp_reverse != NULL) {
1309 imp = exp->exp_imp_reverse;
1310 exp->exp_imp_reverse = NULL;
1312 spin_unlock(&exp->exp_lock);
1314 client_destroy_import(imp);
1316 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1317 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1318 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1319 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1321 EXPORT_SYMBOL(target_destroy_export);
1324 * Recovery functions
1326 static void target_request_copy_get(struct ptlrpc_request *req)
1328 class_export_rpc_get(req->rq_export);
1329 LASSERT(cfs_list_empty(&req->rq_list));
1330 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1332 /* Increase refcount to keep request in queue. */
1333 cfs_atomic_inc(&req->rq_refcount);
1334 /* Let export know it has replays to be handled. */
1335 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1338 static void target_request_copy_put(struct ptlrpc_request *req)
1340 LASSERT(cfs_list_empty(&req->rq_replay_list));
1341 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1343 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1344 class_export_rpc_put(req->rq_export);
1345 ptlrpc_server_drop_request(req);
1348 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1350 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1351 struct obd_export *exp = req->rq_export;
1352 struct ptlrpc_request *reqiter;
1357 spin_lock(&exp->exp_lock);
1358 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1360 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1367 /* We expect it with RESENT and REPLAY flags. */
1368 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1369 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1370 CERROR("invalid flags %x of resent replay\n",
1371 lustre_msg_get_flags(req->rq_reqmsg));
1373 cfs_list_add_tail(&req->rq_replay_list,
1374 &exp->exp_req_replay_queue);
1377 spin_unlock(&exp->exp_lock);
1381 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1383 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1384 LASSERT(req->rq_export);
1386 spin_lock(&req->rq_export->exp_lock);
1387 cfs_list_del_init(&req->rq_replay_list);
1388 spin_unlock(&req->rq_export->exp_lock);
1392 static void target_finish_recovery(struct obd_device *obd)
1396 /* Only log a recovery message when recovery has occurred. */
1397 if (obd->obd_recovery_start) {
1398 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1399 obd->obd_recovery_start);
1400 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1401 "%d recovered and %d %s evicted.\n", obd->obd_name,
1402 (int)elapsed_time / 60, (int)elapsed_time % 60,
1403 obd->obd_max_recoverable_clients,
1404 cfs_atomic_read(&obd->obd_connected_clients),
1405 obd->obd_stale_clients,
1406 obd->obd_stale_clients == 1 ? "was" : "were");
1409 ldlm_reprocess_all_ns(obd->obd_namespace);
1410 spin_lock(&obd->obd_recovery_task_lock);
1411 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1412 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1413 !cfs_list_empty(&obd->obd_final_req_queue)) {
1414 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1416 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1417 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1419 cfs_list_empty(&obd->obd_final_req_queue) ? \
1421 spin_unlock(&obd->obd_recovery_task_lock);
1424 spin_unlock(&obd->obd_recovery_task_lock);
1426 obd->obd_recovery_end = cfs_time_current_sec();
1428 /* When recovery finished, cleanup orphans on MDS and OST. */
1429 if (OBT(obd) && OBP(obd, postrecov)) {
1430 int rc = OBP(obd, postrecov)(obd);
1432 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1438 static void abort_req_replay_queue(struct obd_device *obd)
1440 struct ptlrpc_request *req, *n;
1441 cfs_list_t abort_list;
1443 CFS_INIT_LIST_HEAD(&abort_list);
1444 spin_lock(&obd->obd_recovery_task_lock);
1445 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1446 spin_unlock(&obd->obd_recovery_task_lock);
1447 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1448 DEBUG_REQ(D_WARNING, req, "aborted:");
1449 req->rq_status = -ENOTCONN;
1450 if (ptlrpc_error(req)) {
1451 DEBUG_REQ(D_ERROR, req,
1452 "failed abort_req_reply; skipping");
1454 target_exp_dequeue_req_replay(req);
1455 target_request_copy_put(req);
1459 static void abort_lock_replay_queue(struct obd_device *obd)
1461 struct ptlrpc_request *req, *n;
1462 cfs_list_t abort_list;
1464 CFS_INIT_LIST_HEAD(&abort_list);
1465 spin_lock(&obd->obd_recovery_task_lock);
1466 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1467 spin_unlock(&obd->obd_recovery_task_lock);
1468 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1469 DEBUG_REQ(D_ERROR, req, "aborted:");
1470 req->rq_status = -ENOTCONN;
1471 if (ptlrpc_error(req)) {
1472 DEBUG_REQ(D_ERROR, req,
1473 "failed abort_lock_reply; skipping");
1475 target_request_copy_put(req);
1479 /* Called from a cleanup function if the device is being cleaned up
1480 forcefully. The exports should all have been disconnected already,
1481 the only thing left to do is
1482 - clear the recovery flags
1484 - free queued requests and replies, but don't send replies
1485 Because the obd_stopping flag is set, no new requests should be received.
1488 void target_cleanup_recovery(struct obd_device *obd)
1490 struct ptlrpc_request *req, *n;
1491 cfs_list_t clean_list;
1494 CFS_INIT_LIST_HEAD(&clean_list);
1495 spin_lock(&obd->obd_dev_lock);
1496 if (!obd->obd_recovering) {
1497 spin_unlock(&obd->obd_dev_lock);
1501 obd->obd_recovering = obd->obd_abort_recovery = 0;
1502 spin_unlock(&obd->obd_dev_lock);
1504 spin_lock(&obd->obd_recovery_task_lock);
1505 target_cancel_recovery_timer(obd);
1506 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1507 spin_unlock(&obd->obd_recovery_task_lock);
1509 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1510 LASSERT(req->rq_reply_state == 0);
1511 target_exp_dequeue_req_replay(req);
1512 target_request_copy_put(req);
1515 spin_lock(&obd->obd_recovery_task_lock);
1516 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1517 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1518 spin_unlock(&obd->obd_recovery_task_lock);
1520 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1521 LASSERT(req->rq_reply_state == 0);
1522 target_request_copy_put(req);
1527 EXPORT_SYMBOL(target_cleanup_recovery);
1529 /* obd_recovery_task_lock should be held */
1530 void target_cancel_recovery_timer(struct obd_device *obd)
1532 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1533 cfs_timer_disarm(&obd->obd_recovery_timer);
1535 EXPORT_SYMBOL(target_cancel_recovery_timer);
1537 static void target_start_recovery_timer(struct obd_device *obd)
1539 if (obd->obd_recovery_start != 0)
1542 spin_lock(&obd->obd_dev_lock);
1543 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1544 spin_unlock(&obd->obd_dev_lock);
1548 LASSERT(obd->obd_recovery_timeout != 0);
1550 if (obd->obd_recovery_start != 0) {
1551 spin_unlock(&obd->obd_dev_lock);
1555 cfs_timer_arm(&obd->obd_recovery_timer,
1556 cfs_time_shift(obd->obd_recovery_timeout));
1557 obd->obd_recovery_start = cfs_time_current_sec();
1558 spin_unlock(&obd->obd_dev_lock);
1560 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1561 "or until %d client%s reconnect%s\n",
1563 obd->obd_recovery_timeout / 60,
1564 obd->obd_recovery_timeout % 60,
1565 obd->obd_max_recoverable_clients,
1566 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1567 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1571 * extend recovery window.
1573 * if @extend is true, extend recovery window to have @drt remaining at least;
1574 * otherwise, make sure the recovery timeout value is not less than @drt.
1576 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1580 cfs_duration_t left;
1583 spin_lock(&obd->obd_dev_lock);
1584 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1585 spin_unlock(&obd->obd_dev_lock);
1588 LASSERT(obd->obd_recovery_start != 0);
1590 now = cfs_time_current_sec();
1591 to = obd->obd_recovery_timeout;
1592 end = obd->obd_recovery_start + to;
1593 left = cfs_time_sub(end, now);
1595 if (extend && (drt > left)) {
1597 } else if (!extend && (drt > to)) {
1599 /* reduce drt by already passed time */
1600 drt -= obd->obd_recovery_timeout - left;
1603 if (to > obd->obd_recovery_time_hard)
1604 to = obd->obd_recovery_time_hard;
1605 if (obd->obd_recovery_timeout < to) {
1606 obd->obd_recovery_timeout = to;
1607 cfs_timer_arm(&obd->obd_recovery_timer,
1608 cfs_time_shift(drt));
1610 spin_unlock(&obd->obd_dev_lock);
1612 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1613 obd->obd_name, (unsigned)drt);
1616 /* Reset the timer with each new client connection */
1618 * This timer is actually reconnect_timer, which is for making sure
1619 * the total recovery window is at least as big as my reconnect
1620 * attempt timing. So the initial recovery time_out will be set to
1621 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1622 * from client is bigger than this, then the recovery time_out will
1623 * be extended to make sure the client could be reconnected, in the
1624 * process, the timeout from the new client should be ignored.
1628 check_and_start_recovery_timer(struct obd_device *obd,
1629 struct ptlrpc_request *req,
1632 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1633 struct obd_device_target *obt = &obd->u.obt;
1634 struct lustre_sb_info *lsi;
1636 if (!new_client && service_time)
1637 /* Teach server about old server's estimates, as first guess
1638 * at how long new requests will take. */
1639 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1642 target_start_recovery_timer(obd);
1644 /* Convert the service time to RPC timeout,
1645 * and reuse service_time to limit stack usage. */
1646 service_time = at_est2timeout(service_time);
1648 /* We expect other clients to timeout within service_time, then try
1649 * to reconnect, then try the failover server. The max delay between
1650 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1651 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1653 LASSERT(obt->obt_magic == OBT_MAGIC);
1654 lsi = s2lsi(obt->obt_sb);
1655 if (!(lsi->lsi_flags | LDD_F_IR_CAPABLE))
1656 service_time += 2 * (CONNECTION_SWITCH_MAX +
1657 CONNECTION_SWITCH_INC);
1658 if (service_time > obd->obd_recovery_timeout && !new_client)
1659 extend_recovery_timer(obd, service_time, false);
1662 /** Health checking routines */
1663 static inline int exp_connect_healthy(struct obd_export *exp)
1665 return (exp->exp_in_recovery);
1668 /** if export done req_replay or has replay in queue */
1669 static inline int exp_req_replay_healthy(struct obd_export *exp)
1671 return (!exp->exp_req_replay_needed ||
1672 cfs_atomic_read(&exp->exp_replay_count) > 0);
1674 /** if export done lock_replay or has replay in queue */
1675 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1677 return (!exp->exp_lock_replay_needed ||
1678 cfs_atomic_read(&exp->exp_replay_count) > 0);
1681 static inline int exp_vbr_healthy(struct obd_export *exp)
1683 return (!exp->exp_vbr_failed);
1686 static inline int exp_finished(struct obd_export *exp)
1688 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1691 /** Checking routines for recovery */
1692 static int check_for_clients(struct obd_device *obd)
1694 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1696 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1698 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1699 if (obd->obd_no_conn == 0 &&
1700 clnts + obd->obd_stale_clients == obd->obd_max_recoverable_clients)
1705 static int check_for_next_transno(struct obd_device *obd)
1707 struct ptlrpc_request *req = NULL;
1708 int wake_up = 0, connected, completed, queue_len;
1709 __u64 next_transno, req_transno;
1712 spin_lock(&obd->obd_recovery_task_lock);
1713 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1714 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1715 struct ptlrpc_request, rq_list);
1716 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1721 connected = cfs_atomic_read(&obd->obd_connected_clients);
1722 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1723 queue_len = obd->obd_requests_queued_for_recovery;
1724 next_transno = obd->obd_next_recovery_transno;
1726 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1727 "req_transno: "LPU64", next_transno: "LPU64"\n",
1728 obd->obd_max_recoverable_clients, connected, completed,
1729 queue_len, req_transno, next_transno);
1731 if (obd->obd_abort_recovery) {
1732 CDEBUG(D_HA, "waking for aborted recovery\n");
1734 } else if (obd->obd_recovery_expired) {
1735 CDEBUG(D_HA, "waking for expired recovery\n");
1737 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1738 CDEBUG(D_HA, "waking for completed recovery\n");
1740 } else if (req_transno == next_transno) {
1741 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1743 } else if (queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1745 /** handle gaps occured due to lost reply or VBR */
1746 LASSERTF(req_transno >= next_transno,
1747 "req_transno: "LPU64", next_transno: "LPU64"\n",
1748 req_transno, next_transno);
1749 if (req_transno > obd->obd_last_committed &&
1750 !obd->obd_version_recov)
1753 "%s: waking for gap in transno, VBR is %s (skip: "
1754 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1755 ", last_committed: "LPD64")\n",
1756 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1757 next_transno, queue_len, completed, connected,
1758 req_transno, obd->obd_last_committed);
1759 obd->obd_next_recovery_transno = req_transno;
1761 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1762 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1763 " by fail_lock, waking up ("LPD64")\n", next_transno);
1764 obd->obd_next_recovery_transno = req_transno;
1767 spin_unlock(&obd->obd_recovery_task_lock);
1771 static int check_for_next_lock(struct obd_device *obd)
1775 spin_lock(&obd->obd_recovery_task_lock);
1776 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1777 CDEBUG(D_HA, "waking for next lock\n");
1779 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1780 CDEBUG(D_HA, "waking for completed lock replay\n");
1782 } else if (obd->obd_abort_recovery) {
1783 CDEBUG(D_HA, "waking for aborted recovery\n");
1785 } else if (obd->obd_recovery_expired) {
1786 CDEBUG(D_HA, "waking for expired recovery\n");
1789 spin_unlock(&obd->obd_recovery_task_lock);
1795 * wait for recovery events,
1796 * check its status with help of check_routine
1797 * evict dead clients via health_check
1799 static int target_recovery_overseer(struct obd_device *obd,
1800 int (*check_routine)(struct obd_device *),
1801 int (*health_check)(struct obd_export *))
1804 cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1805 if (obd->obd_abort_recovery) {
1806 CWARN("recovery is aborted, evict exports in recovery\n");
1807 /** evict exports which didn't finish recovery yet */
1808 class_disconnect_stale_exports(obd, exp_finished);
1810 } else if (obd->obd_recovery_expired) {
1811 obd->obd_recovery_expired = 0;
1812 /** If some clients died being recovered, evict them */
1813 LCONSOLE_WARN("%s: recovery is timed out, "
1814 "evict stale exports\n", obd->obd_name);
1815 /** evict cexports with no replay in queue, they are stalled */
1816 class_disconnect_stale_exports(obd, health_check);
1817 /** continue with VBR */
1818 spin_lock(&obd->obd_dev_lock);
1819 obd->obd_version_recov = 1;
1820 spin_unlock(&obd->obd_dev_lock);
1822 * reset timer, recovery will proceed with versions now,
1823 * timeout is set just to handle reconnection delays
1825 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1826 /** Wait for recovery events again, after evicting bad clients */
1832 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1834 struct ptlrpc_request *req = NULL;
1837 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1838 obd->obd_next_recovery_transno);
1840 if (target_recovery_overseer(obd, check_for_next_transno,
1841 exp_req_replay_healthy)) {
1842 abort_req_replay_queue(obd);
1843 abort_lock_replay_queue(obd);
1846 spin_lock(&obd->obd_recovery_task_lock);
1847 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1848 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1849 struct ptlrpc_request, rq_list);
1850 cfs_list_del_init(&req->rq_list);
1851 obd->obd_requests_queued_for_recovery--;
1852 spin_unlock(&obd->obd_recovery_task_lock);
1854 spin_unlock(&obd->obd_recovery_task_lock);
1855 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1856 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1857 /** evict exports failed VBR */
1858 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1863 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1865 struct ptlrpc_request *req = NULL;
1867 CDEBUG(D_HA, "Waiting for lock\n");
1868 if (target_recovery_overseer(obd, check_for_next_lock,
1869 exp_lock_replay_healthy))
1870 abort_lock_replay_queue(obd);
1872 spin_lock(&obd->obd_recovery_task_lock);
1873 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1874 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1875 struct ptlrpc_request, rq_list);
1876 cfs_list_del_init(&req->rq_list);
1877 spin_unlock(&obd->obd_recovery_task_lock);
1879 spin_unlock(&obd->obd_recovery_task_lock);
1880 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1881 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1882 /** evict exports failed VBR */
1883 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1888 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1890 struct ptlrpc_request *req = NULL;
1892 spin_lock(&obd->obd_recovery_task_lock);
1893 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1894 req = cfs_list_entry(obd->obd_final_req_queue.next,
1895 struct ptlrpc_request, rq_list);
1896 cfs_list_del_init(&req->rq_list);
1897 spin_unlock(&obd->obd_recovery_task_lock);
1898 if (req->rq_export->exp_in_recovery) {
1899 spin_lock(&req->rq_export->exp_lock);
1900 req->rq_export->exp_in_recovery = 0;
1901 spin_unlock(&req->rq_export->exp_lock);
1904 spin_unlock(&obd->obd_recovery_task_lock);
1909 static int handle_recovery_req(struct ptlrpc_thread *thread,
1910 struct ptlrpc_request *req,
1911 svc_handler_t handler)
1917 * export can be evicted during recovery, no need to handle replays for
1918 * it after that, discard such request silently
1920 if (req->rq_export->exp_disconnected)
1921 GOTO(reqcopy_put, rc = 0);
1923 rc = lu_context_init(&req->rq_recov_session, LCT_SESSION);
1925 CERROR("Failure to initialize session: %d\n", rc);
1926 GOTO(reqcopy_put, rc);
1929 req->rq_recov_session.lc_thread = thread;
1930 lu_context_enter(&req->rq_recov_session);
1931 req->rq_svc_thread = thread;
1932 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1934 /* thread context */
1935 lu_context_enter(&thread->t_env->le_ctx);
1937 lu_context_exit(&thread->t_env->le_ctx);
1939 lu_context_exit(&req->rq_recov_session);
1940 lu_context_fini(&req->rq_recov_session);
1941 /* don't reset timer for final stage */
1942 if (!exp_finished(req->rq_export)) {
1943 int to = obd_timeout;
1946 * Add request timeout to the recovery time so next request from
1947 * this client may come in recovery time
1950 struct ptlrpc_service_part *svcpt;
1952 svcpt = req->rq_rqbd->rqbd_svcpt;
1953 /* If the server sent early reply for this request,
1954 * the client will recalculate the timeout according to
1955 * current server estimate service time, so we will
1956 * use the maxium timeout here for waiting the client
1957 * sending the next req */
1958 to = max((int)at_est2timeout(
1959 at_get(&svcpt->scp_at_estimate)),
1960 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1961 /* Add 2 net_latency, one for balance rq_deadline
1962 * (see ptl_send_rpc), one for resend the req to server,
1963 * Note: client will pack net_latency in replay req
1964 * (see ptlrpc_replay_req) */
1965 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
1967 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1973 static int target_recovery_thread(void *arg)
1975 struct lu_target *lut = arg;
1976 struct obd_device *obd = lut->lut_obd;
1977 struct ptlrpc_request *req;
1978 struct target_recovery_data *trd = &obd->obd_recovery_data;
1979 unsigned long delta;
1980 unsigned long flags;
1982 struct ptlrpc_thread *thread = NULL;
1986 cfs_daemonize_ctxt("tgt_recov");
1988 SIGNAL_MASK_LOCK(current, flags);
1989 sigfillset(¤t->blocked);
1991 SIGNAL_MASK_UNLOCK(current, flags);
1993 OBD_ALLOC_PTR(thread);
1999 OBD_FREE_PTR(thread);
2003 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
2005 OBD_FREE_PTR(thread);
2010 thread->t_env = env;
2011 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
2012 env->le_ctx.lc_thread = thread;
2013 thread->t_data = NULL;
2014 thread->t_watchdog = NULL;
2016 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2018 trd->trd_processing_task = cfs_curproc_pid();
2020 spin_lock(&obd->obd_dev_lock);
2021 obd->obd_recovering = 1;
2022 spin_unlock(&obd->obd_dev_lock);
2023 complete(&trd->trd_starting);
2025 /* first of all, we have to know the first transno to replay */
2026 if (target_recovery_overseer(obd, check_for_clients,
2027 exp_connect_healthy)) {
2028 abort_req_replay_queue(obd);
2029 abort_lock_replay_queue(obd);
2032 /* next stage: replay requests */
2034 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
2035 cfs_atomic_read(&obd->obd_req_replay_clients),
2036 obd->obd_next_recovery_transno);
2037 while ((req = target_next_replay_req(obd))) {
2038 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
2039 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
2040 lustre_msg_get_transno(req->rq_reqmsg),
2041 libcfs_nid2str(req->rq_peer.nid));
2042 handle_recovery_req(thread, req,
2043 trd->trd_recovery_handler);
2045 * bz18031: increase next_recovery_transno before
2046 * target_request_copy_put() will drop exp_rpc reference
2048 spin_lock(&obd->obd_recovery_task_lock);
2049 obd->obd_next_recovery_transno++;
2050 spin_unlock(&obd->obd_recovery_task_lock);
2051 target_exp_dequeue_req_replay(req);
2052 target_request_copy_put(req);
2053 obd->obd_replayed_requests++;
2057 * The second stage: replay locks
2059 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2060 cfs_atomic_read(&obd->obd_lock_replay_clients));
2061 while ((req = target_next_replay_lock(obd))) {
2062 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
2063 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2064 libcfs_nid2str(req->rq_peer.nid));
2065 handle_recovery_req(thread, req,
2066 trd->trd_recovery_handler);
2067 target_request_copy_put(req);
2068 obd->obd_replayed_locks++;
2072 * The third stage: reply on final pings, at this moment all clients
2073 * must have request in final queue
2075 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2076 /** Update server last boot epoch */
2077 tgt_boot_epoch_update(lut);
2078 /* We drop recoverying flag to forward all new requests
2079 * to regular mds_handle() since now */
2080 spin_lock(&obd->obd_dev_lock);
2081 obd->obd_recovering = obd->obd_abort_recovery = 0;
2082 spin_unlock(&obd->obd_dev_lock);
2083 spin_lock(&obd->obd_recovery_task_lock);
2084 target_cancel_recovery_timer(obd);
2085 spin_unlock(&obd->obd_recovery_task_lock);
2086 while ((req = target_next_final_ping(obd))) {
2087 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
2088 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2089 libcfs_nid2str(req->rq_peer.nid));
2090 handle_recovery_req(thread, req,
2091 trd->trd_recovery_handler);
2092 target_request_copy_put(req);
2095 delta = (jiffies - delta) / CFS_HZ;
2096 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2097 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2098 if (delta > OBD_RECOVERY_TIME_SOFT) {
2099 CWARN("too long recovery - read logs\n");
2100 libcfs_debug_dumplog();
2103 target_finish_recovery(obd);
2105 lu_context_fini(&env->le_ctx);
2106 trd->trd_processing_task = 0;
2107 complete(&trd->trd_finishing);
2109 OBD_FREE_PTR(thread);
2114 static int target_start_recovery_thread(struct lu_target *lut,
2115 svc_handler_t handler)
2117 struct obd_device *obd = lut->lut_obd;
2119 struct target_recovery_data *trd = &obd->obd_recovery_data;
2121 memset(trd, 0, sizeof(*trd));
2122 init_completion(&trd->trd_starting);
2123 init_completion(&trd->trd_finishing);
2124 trd->trd_recovery_handler = handler;
2126 if (cfs_create_thread(target_recovery_thread, lut, 0) > 0) {
2127 wait_for_completion(&trd->trd_starting);
2128 LASSERT(obd->obd_recovering != 0);
2135 void target_stop_recovery_thread(struct obd_device *obd)
2137 if (obd->obd_recovery_data.trd_processing_task > 0) {
2138 struct target_recovery_data *trd = &obd->obd_recovery_data;
2139 /** recovery can be done but postrecovery is not yet */
2140 spin_lock(&obd->obd_dev_lock);
2141 if (obd->obd_recovering) {
2142 CERROR("%s: Aborting recovery\n", obd->obd_name);
2143 obd->obd_abort_recovery = 1;
2144 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2146 spin_unlock(&obd->obd_dev_lock);
2147 wait_for_completion(&trd->trd_finishing);
2150 EXPORT_SYMBOL(target_stop_recovery_thread);
2152 void target_recovery_fini(struct obd_device *obd)
2154 class_disconnect_exports(obd);
2155 target_stop_recovery_thread(obd);
2156 target_cleanup_recovery(obd);
2158 EXPORT_SYMBOL(target_recovery_fini);
2160 static void target_recovery_expired(unsigned long castmeharder)
2162 struct obd_device *obd = (struct obd_device *)castmeharder;
2163 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2164 " after %lds (%d clients connected)\n",
2165 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2166 cfs_time_current_sec()- obd->obd_recovery_start,
2167 cfs_atomic_read(&obd->obd_connected_clients));
2169 obd->obd_recovery_expired = 1;
2170 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2173 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2175 struct obd_device *obd = lut->lut_obd;
2176 if (obd->obd_max_recoverable_clients == 0) {
2177 /** Update server last boot epoch */
2178 tgt_boot_epoch_update(lut);
2182 CWARN("RECOVERY: service %s, %d recoverable clients, "
2183 "last_transno "LPU64"\n", obd->obd_name,
2184 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2185 LASSERT(obd->obd_stopping == 0);
2186 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2187 obd->obd_recovery_start = 0;
2188 obd->obd_recovery_end = 0;
2190 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2191 target_start_recovery_thread(lut, handler);
2193 EXPORT_SYMBOL(target_recovery_init);
2195 #endif /* __KERNEL__ */
2197 static int target_process_req_flags(struct obd_device *obd,
2198 struct ptlrpc_request *req)
2200 struct obd_export *exp = req->rq_export;
2201 LASSERT(exp != NULL);
2202 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2203 /* client declares he's ready to replay locks */
2204 spin_lock(&exp->exp_lock);
2205 if (exp->exp_req_replay_needed) {
2206 exp->exp_req_replay_needed = 0;
2207 spin_unlock(&exp->exp_lock);
2209 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2210 cfs_atomic_dec(&obd->obd_req_replay_clients);
2212 spin_unlock(&exp->exp_lock);
2215 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2216 /* client declares he's ready to complete recovery
2217 * so, we put the request on th final queue */
2218 spin_lock(&exp->exp_lock);
2219 if (exp->exp_lock_replay_needed) {
2220 exp->exp_lock_replay_needed = 0;
2221 spin_unlock(&exp->exp_lock);
2223 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2224 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2226 spin_unlock(&exp->exp_lock);
2232 int target_queue_recovery_request(struct ptlrpc_request *req,
2233 struct obd_device *obd)
2237 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2240 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
2241 /* Processing the queue right now, don't re-add. */
2245 target_process_req_flags(obd, req);
2247 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2248 /* client declares he's ready to complete recovery
2249 * so, we put the request on th final queue */
2250 target_request_copy_get(req);
2251 DEBUG_REQ(D_HA, req, "queue final req");
2252 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2253 spin_lock(&obd->obd_recovery_task_lock);
2254 if (obd->obd_recovering) {
2255 cfs_list_add_tail(&req->rq_list,
2256 &obd->obd_final_req_queue);
2258 spin_unlock(&obd->obd_recovery_task_lock);
2259 target_request_copy_put(req);
2260 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2262 spin_unlock(&obd->obd_recovery_task_lock);
2265 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2266 /* client declares he's ready to replay locks */
2267 target_request_copy_get(req);
2268 DEBUG_REQ(D_HA, req, "queue lock replay req");
2269 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2270 spin_lock(&obd->obd_recovery_task_lock);
2271 LASSERT(obd->obd_recovering);
2272 /* usually due to recovery abort */
2273 if (!req->rq_export->exp_in_recovery) {
2274 spin_unlock(&obd->obd_recovery_task_lock);
2275 target_request_copy_put(req);
2278 LASSERT(req->rq_export->exp_lock_replay_needed);
2279 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2280 spin_unlock(&obd->obd_recovery_task_lock);
2284 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2285 * (i.e. buflens etc are in my own byte order), but type-dependent
2286 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2289 CFS_INIT_LIST_HEAD(&req->rq_list);
2290 DEBUG_REQ(D_HA, req, "not queueing");
2294 /* If we're processing the queue, we want don't want to queue this
2297 * Also, if this request has a transno less than the one we're waiting
2298 * for, we should process it now. It could (and currently always will)
2299 * be an open request for a descriptor that was opened some time ago.
2301 * Also, a resent, replayed request that has already been
2302 * handled will pass through here and be processed immediately.
2304 CDEBUG(D_HA, "Next recovery transno: "LPU64
2305 ", current: "LPU64", replaying\n",
2306 obd->obd_next_recovery_transno, transno);
2307 spin_lock(&obd->obd_recovery_task_lock);
2308 if (transno < obd->obd_next_recovery_transno) {
2309 /* Processing the queue right now, don't re-add. */
2310 LASSERT(cfs_list_empty(&req->rq_list));
2311 spin_unlock(&obd->obd_recovery_task_lock);
2314 spin_unlock(&obd->obd_recovery_task_lock);
2316 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2319 target_request_copy_get(req);
2320 if (!req->rq_export->exp_in_recovery) {
2321 target_request_copy_put(req);
2324 LASSERT(req->rq_export->exp_req_replay_needed);
2326 if (target_exp_enqueue_req_replay(req)) {
2327 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2328 target_request_copy_put(req);
2333 spin_lock(&obd->obd_recovery_task_lock);
2334 LASSERT(obd->obd_recovering);
2335 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2336 struct ptlrpc_request *reqiter =
2337 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2339 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2340 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2345 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2347 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2348 "has been claimed by another client");
2349 spin_unlock(&obd->obd_recovery_task_lock);
2350 target_exp_dequeue_req_replay(req);
2351 target_request_copy_put(req);
2357 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2359 obd->obd_requests_queued_for_recovery++;
2360 spin_unlock(&obd->obd_recovery_task_lock);
2361 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2364 EXPORT_SYMBOL(target_queue_recovery_request);
2366 int target_handle_ping(struct ptlrpc_request *req)
2368 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2369 return req_capsule_server_pack(&req->rq_pill);
2371 EXPORT_SYMBOL(target_handle_ping);
2373 void target_committed_to_req(struct ptlrpc_request *req)
2375 struct obd_export *exp = req->rq_export;
2377 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2378 lustre_msg_set_last_committed(req->rq_repmsg,
2379 exp->exp_last_committed);
2381 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2382 "%d)", exp->exp_obd->obd_no_transno,
2383 req->rq_repmsg == NULL);
2385 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2386 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2388 EXPORT_SYMBOL(target_committed_to_req);
2390 #endif /* HAVE_SERVER_SUPPORT */
2393 * Packs current SLV and Limit into \a req.
2395 int target_pack_pool_reply(struct ptlrpc_request *req)
2397 struct obd_device *obd;
2400 /* Check that we still have all structures alive as this may
2401 * be some late RPC at shutdown time. */
2402 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2403 !exp_connect_lru_resize(req->rq_export))) {
2404 lustre_msg_set_slv(req->rq_repmsg, 0);
2405 lustre_msg_set_limit(req->rq_repmsg, 0);
2409 /* OBD is alive here as export is alive, which we checked above. */
2410 obd = req->rq_export->exp_obd;
2412 read_lock(&obd->obd_pool_lock);
2413 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2414 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2415 read_unlock(&obd->obd_pool_lock);
2419 EXPORT_SYMBOL(target_pack_pool_reply);
2421 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2423 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2424 DEBUG_REQ(D_ERROR, req, "dropping reply");
2429 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2430 req->rq_status = rc;
2431 return (ptlrpc_send_error(req, 1));
2433 DEBUG_REQ(D_NET, req, "sending reply");
2436 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2439 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2441 struct ptlrpc_service_part *svcpt;
2443 struct ptlrpc_reply_state *rs;
2444 struct obd_export *exp;
2447 if (req->rq_no_reply) {
2452 svcpt = req->rq_rqbd->rqbd_svcpt;
2453 rs = req->rq_reply_state;
2454 if (rs == NULL || !rs->rs_difficult) {
2456 target_send_reply_msg (req, rc, fail_id);
2461 /* must be an export if locks saved */
2462 LASSERT (req->rq_export != NULL);
2463 /* req/reply consistent */
2464 LASSERT(rs->rs_svcpt == svcpt);
2467 LASSERT (!rs->rs_scheduled);
2468 LASSERT (!rs->rs_scheduled_ever);
2469 LASSERT (!rs->rs_handled);
2470 LASSERT (!rs->rs_on_net);
2471 LASSERT (rs->rs_export == NULL);
2472 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2473 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2475 exp = class_export_get (req->rq_export);
2477 /* disable reply scheduling while I'm setting up */
2478 rs->rs_scheduled = 1;
2480 rs->rs_xid = req->rq_xid;
2481 rs->rs_transno = req->rq_transno;
2482 rs->rs_export = exp;
2483 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2485 spin_lock(&exp->exp_uncommitted_replies_lock);
2486 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2487 rs->rs_transno, exp->exp_last_committed);
2488 if (rs->rs_transno > exp->exp_last_committed) {
2489 /* not committed already */
2490 cfs_list_add_tail(&rs->rs_obd_list,
2491 &exp->exp_uncommitted_replies);
2493 spin_unlock(&exp->exp_uncommitted_replies_lock);
2495 spin_lock(&exp->exp_lock);
2496 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2497 spin_unlock(&exp->exp_lock);
2499 netrc = target_send_reply_msg(req, rc, fail_id);
2501 spin_lock(&svcpt->scp_rep_lock);
2503 cfs_atomic_inc(&svcpt->scp_nreps_difficult);
2506 /* error sending: reply is off the net. Also we need +1
2507 * reply ref until ptlrpc_handle_rs() is done
2508 * with the reply state (if the send was successful, there
2509 * would have been +1 ref for the net, which
2510 * reply_out_callback leaves alone) */
2512 ptlrpc_rs_addref(rs);
2515 spin_lock(&rs->rs_lock);
2516 if (rs->rs_transno <= exp->exp_last_committed ||
2517 (!rs->rs_on_net && !rs->rs_no_ack) ||
2518 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2519 cfs_list_empty(&rs->rs_obd_list)) {
2520 CDEBUG(D_HA, "Schedule reply immediately\n");
2521 ptlrpc_dispatch_difficult_reply(rs);
2523 cfs_list_add(&rs->rs_list, &svcpt->scp_rep_active);
2524 rs->rs_scheduled = 0; /* allow notifier to schedule */
2526 spin_unlock(&rs->rs_lock);
2527 spin_unlock(&svcpt->scp_rep_lock);
2530 EXPORT_SYMBOL(target_send_reply);
2532 ldlm_mode_t lck_compat_array[] = {
2533 [LCK_EX] LCK_COMPAT_EX,
2534 [LCK_PW] LCK_COMPAT_PW,
2535 [LCK_PR] LCK_COMPAT_PR,
2536 [LCK_CW] LCK_COMPAT_CW,
2537 [LCK_CR] LCK_COMPAT_CR,
2538 [LCK_NL] LCK_COMPAT_NL,
2539 [LCK_GROUP] LCK_COMPAT_GROUP,
2540 [LCK_COS] LCK_COMPAT_COS,
2544 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2545 * not escape to the user level.
2547 int ldlm_error2errno(ldlm_error_t error)
2555 case ELDLM_LOCK_CHANGED:
2558 case ELDLM_LOCK_ABORTED:
2561 case ELDLM_LOCK_REPLACED:
2564 case ELDLM_NO_LOCK_DATA:
2567 case ELDLM_NAMESPACE_EXISTS:
2570 case ELDLM_BAD_NAMESPACE:
2574 if (((int)error) < 0) /* cast to signed type */
2575 result = error; /* as ldlm_error_t can be unsigned */
2577 CERROR("Invalid DLM result code: %d\n", error);
2583 EXPORT_SYMBOL(ldlm_error2errno);
2586 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2588 ldlm_error_t ldlm_errno2error(int err_no)
2597 error = ELDLM_LOCK_CHANGED;
2600 error = ELDLM_LOCK_ABORTED;
2603 error = ELDLM_LOCK_REPLACED;
2606 error = ELDLM_NO_LOCK_DATA;
2609 error = ELDLM_NAMESPACE_EXISTS;
2612 error = ELDLM_BAD_NAMESPACE;
2619 EXPORT_SYMBOL(ldlm_errno2error);
2621 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2622 void ldlm_dump_export_locks(struct obd_export *exp)
2624 spin_lock(&exp->exp_locks_list_guard);
2625 if (!cfs_list_empty(&exp->exp_locks_list)) {
2626 struct ldlm_lock *lock;
2628 CERROR("dumping locks for export %p,"
2629 "ignore if the unmount doesn't hang\n", exp);
2630 cfs_list_for_each_entry(lock, &exp->exp_locks_list,
2632 LDLM_ERROR(lock, "lock:");
2634 spin_unlock(&exp->exp_locks_list_guard);
2638 #ifdef HAVE_SERVER_SUPPORT
2639 static int target_bulk_timeout(void *data)
2642 /* We don't fail the connection here, because having the export
2643 * killed makes the (vital) call to commitrw very sad.
2648 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2650 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2653 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2654 struct l_wait_info *lwi)
2656 struct ptlrpc_request *req = desc->bd_req;
2660 /* If there is eviction in progress, wait for it to finish. */
2661 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2662 *lwi = LWI_INTR(NULL, NULL);
2663 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2664 !cfs_atomic_read(&exp->exp_obd->
2665 obd_evict_inprogress),
2669 /* Check if client was evicted or tried to reconnect already. */
2670 if (exp->exp_failed || exp->exp_abort_active_req) {
2673 if (desc->bd_type == BULK_PUT_SINK)
2674 rc = sptlrpc_svc_wrap_bulk(req, desc);
2676 rc = ptlrpc_start_bulk_transfer(desc);
2679 if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2680 ptlrpc_abort_bulk(desc);
2681 } else if (rc == 0) {
2682 time_t start = cfs_time_current_sec();
2684 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2685 cfs_duration_t timeout = timeoutl <= 0 ?
2686 CFS_TICK : cfs_time_seconds(timeoutl);
2687 *lwi = LWI_TIMEOUT_INTERVAL(timeout,
2688 cfs_time_seconds(1),
2689 target_bulk_timeout,
2691 rc = l_wait_event(desc->bd_waitq,
2692 !ptlrpc_server_bulk_active(desc) ||
2694 exp->exp_abort_active_req,
2696 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2697 /* Wait again if we changed deadline. */
2698 } while ((rc == -ETIMEDOUT) &&
2699 (req->rq_deadline > cfs_time_current_sec()));
2701 if (rc == -ETIMEDOUT) {
2702 DEBUG_REQ(D_ERROR, req,
2703 "timeout on bulk %s after %ld%+lds",
2705 req->rq_deadline - start,
2706 cfs_time_current_sec() -
2708 ptlrpc_abort_bulk(desc);
2709 } else if (exp->exp_failed) {
2710 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2713 ptlrpc_abort_bulk(desc);
2714 } else if (exp->exp_abort_active_req) {
2715 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2717 /* We don't reply anyway. */
2719 ptlrpc_abort_bulk(desc);
2720 } else if (!desc->bd_success ||
2721 desc->bd_nob_transferred != desc->bd_nob) {
2722 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2724 "truncated" : "network error on",
2726 desc->bd_nob_transferred,
2728 /* XXX Should this be a different errno? */
2730 } else if (desc->bd_type == BULK_GET_SINK) {
2731 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2734 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2735 bulk2type(desc), rc);
2740 EXPORT_SYMBOL(target_bulk_io);
2742 #endif /* HAVE_SERVER_SUPPORT */