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.
37 #define DEBUG_SUBSYSTEM S_LDLM
40 # include <libcfs/libcfs.h>
42 # include <liblustre.h>
45 #include <obd_class.h>
46 #include <lustre_dlm.h>
47 #include <lustre_net.h>
48 #include <lustre_sec.h>
49 #include "ldlm_internal.h"
51 /* @priority: if non-zero, move the selected to the list head
52 * @create: if zero, only search in existed connections
54 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
55 int priority, int create)
57 struct ptlrpc_connection *ptlrpc_conn;
58 struct obd_import_conn *imp_conn = NULL, *item;
62 if (!create && !priority) {
63 CDEBUG(D_HA, "Nothing to do\n");
67 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
69 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
74 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
76 GOTO(out_put, rc = -ENOMEM);
80 cfs_spin_lock(&imp->imp_lock);
81 cfs_list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
82 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
84 cfs_list_del(&item->oic_item);
85 cfs_list_add(&item->oic_item,
87 item->oic_last_attempt = 0;
89 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
90 imp, imp->imp_obd->obd_name, uuid->uuid,
91 (priority ? ", moved to head" : ""));
92 cfs_spin_unlock(&imp->imp_lock);
93 GOTO(out_free, rc = 0);
98 imp_conn->oic_conn = ptlrpc_conn;
99 imp_conn->oic_uuid = *uuid;
100 imp_conn->oic_last_attempt = 0;
102 cfs_list_add(&imp_conn->oic_item, &imp->imp_conn_list);
104 cfs_list_add_tail(&imp_conn->oic_item,
105 &imp->imp_conn_list);
106 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
107 imp, imp->imp_obd->obd_name, uuid->uuid,
108 (priority ? "head" : "tail"));
110 cfs_spin_unlock(&imp->imp_lock);
111 GOTO(out_free, rc = -ENOENT);
114 cfs_spin_unlock(&imp->imp_lock);
118 OBD_FREE(imp_conn, sizeof(*imp_conn));
120 ptlrpc_connection_put(ptlrpc_conn);
124 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
126 return import_set_conn(imp, uuid, 1, 0);
129 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
132 return import_set_conn(imp, uuid, priority, 1);
135 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
137 struct obd_import_conn *imp_conn;
138 struct obd_export *dlmexp;
142 cfs_spin_lock(&imp->imp_lock);
143 if (cfs_list_empty(&imp->imp_conn_list)) {
144 LASSERT(!imp->imp_connection);
148 cfs_list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
149 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
151 LASSERT(imp_conn->oic_conn);
153 /* is current conn? */
154 if (imp_conn == imp->imp_conn_current) {
155 LASSERT(imp_conn->oic_conn == imp->imp_connection);
157 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
158 imp->imp_state != LUSTRE_IMP_DISCON) {
159 CERROR("can't remove current connection\n");
160 GOTO(out, rc = -EBUSY);
163 ptlrpc_connection_put(imp->imp_connection);
164 imp->imp_connection = NULL;
166 dlmexp = class_conn2export(&imp->imp_dlm_handle);
167 if (dlmexp && dlmexp->exp_connection) {
168 LASSERT(dlmexp->exp_connection ==
170 ptlrpc_connection_put(dlmexp->exp_connection);
171 dlmexp->exp_connection = NULL;
175 cfs_list_del(&imp_conn->oic_item);
176 ptlrpc_connection_put(imp_conn->oic_conn);
177 OBD_FREE(imp_conn, sizeof(*imp_conn));
178 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
179 imp, imp->imp_obd->obd_name, uuid->uuid);
184 cfs_spin_unlock(&imp->imp_lock);
186 CERROR("connection %s not found\n", uuid->uuid);
191 * Find conn uuid by peer nid. @peer is a server nid. This function is used
192 * to find a conn uuid of @imp which can reach @peer.
194 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
195 struct obd_uuid *uuid)
197 struct obd_import_conn *conn;
201 cfs_spin_lock(&imp->imp_lock);
202 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
203 /* check if conn uuid does have this peer nid */
204 if (class_check_uuid(&conn->oic_uuid, peer)) {
205 *uuid = conn->oic_uuid;
210 cfs_spin_unlock(&imp->imp_lock);
213 EXPORT_SYMBOL(client_import_find_conn);
215 void client_destroy_import(struct obd_import *imp)
217 /* drop security policy instance after all rpc finished/aborted
218 * to let all busy contexts be released. */
219 class_import_get(imp);
220 class_destroy_import(imp);
221 sptlrpc_import_sec_put(imp);
222 class_import_put(imp);
224 EXPORT_SYMBOL(client_destroy_import);
227 * check whether the osc is on MDT or not
230 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
232 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
235 static int osc_on_mdt(char *obdname)
239 ptr = strrchr(obdname, '-');
243 if (strncmp(ptr + 1, "MDT", 3) == 0)
249 /* configure an RPC client OBD device
254 * 3 - inactive-on-startup
256 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
258 struct client_obd *cli = &obddev->u.cli;
259 struct obd_import *imp;
260 struct obd_uuid server_uuid;
261 int rq_portal, rp_portal, connect_op;
262 char *name = obddev->obd_type->typ_name;
263 ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
267 /* In a more perfect world, we would hang a ptlrpc_client off of
268 * obd_type and just use the values from there. */
269 if (!strcmp(name, LUSTRE_OSC_NAME) ||
270 (!strcmp(name, LUSTRE_OSP_NAME) &&
271 !is_osp_on_ost(lustre_cfg_buf(lcfg, 0)))) {
272 rq_portal = OST_REQUEST_PORTAL;
273 rp_portal = OSC_REPLY_PORTAL;
274 connect_op = OST_CONNECT;
275 cli->cl_sp_me = LUSTRE_SP_CLI;
276 cli->cl_sp_to = LUSTRE_SP_OST;
277 ns_type = LDLM_NS_TYPE_OSC;
279 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
280 (!strcmp(name, LUSTRE_OSP_NAME) &&
281 is_osp_on_ost(lustre_cfg_buf(lcfg, 0)))) {
282 rq_portal = MDS_REQUEST_PORTAL;
283 rp_portal = MDC_REPLY_PORTAL;
284 connect_op = MDS_CONNECT;
285 cli->cl_sp_me = LUSTRE_SP_CLI;
286 cli->cl_sp_to = LUSTRE_SP_MDT;
287 ns_type = LDLM_NS_TYPE_MDC;
289 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
290 rq_portal = MGS_REQUEST_PORTAL;
291 rp_portal = MGC_REPLY_PORTAL;
292 connect_op = MGS_CONNECT;
293 cli->cl_sp_me = LUSTRE_SP_MGC;
294 cli->cl_sp_to = LUSTRE_SP_MGS;
295 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
296 ns_type = LDLM_NS_TYPE_MGC;
298 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
299 rq_portal = OST_REQUEST_PORTAL;
300 rp_portal = OSC_REPLY_PORTAL;
301 connect_op = OST_CONNECT;
302 cli->cl_sp_me = LUSTRE_SP_CLI;
303 cli->cl_sp_to = LUSTRE_SP_OST;
304 ns_type = LDLM_NS_TYPE_OSC;
307 CERROR("unknown client OBD type \"%s\", can't setup\n",
312 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
313 CERROR("requires a TARGET UUID\n");
317 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
318 CERROR("client UUID must be less than 38 characters\n");
322 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
323 CERROR("setup requires a SERVER UUID\n");
327 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
328 CERROR("target UUID must be less than 38 characters\n");
332 cfs_init_rwsem(&cli->cl_sem);
333 cfs_sema_init(&cli->cl_mgc_sem, 1);
334 cli->cl_conn_count = 0;
335 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
336 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
337 sizeof(server_uuid)));
340 cli->cl_avail_grant = 0;
341 /* FIXME: should limit this for the sum of all cl_dirty_max */
342 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
343 if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > cfs_num_physpages / 8)
344 cli->cl_dirty_max = cfs_num_physpages << (CFS_PAGE_SHIFT - 3);
345 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
346 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
347 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
348 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
349 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
350 client_obd_list_lock_init(&cli->cl_loi_list_lock);
351 cfs_atomic_set(&cli->cl_pending_w_pages, 0);
352 cfs_atomic_set(&cli->cl_pending_r_pages, 0);
353 cli->cl_r_in_flight = 0;
354 cli->cl_w_in_flight = 0;
356 cfs_spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
357 cfs_spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
358 cfs_spin_lock_init(&cli->cl_read_page_hist.oh_lock);
359 cfs_spin_lock_init(&cli->cl_write_page_hist.oh_lock);
360 cfs_spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
361 cfs_spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
362 cfs_waitq_init(&cli->cl_destroy_waitq);
363 cfs_atomic_set(&cli->cl_destroy_in_flight, 0);
364 #ifdef ENABLE_CHECKSUM
365 /* Turn on checksumming by default. */
366 cli->cl_checksum = 1;
368 * The supported checksum types will be worked out at connect time
369 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
372 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
374 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
376 /* This value may be changed at connect time in
377 ptlrpc_connect_interpret. */
378 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
379 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
381 if (!strcmp(name, LUSTRE_MDC_NAME)) {
382 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
383 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
384 cli->cl_max_rpcs_in_flight = 2;
385 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
386 cli->cl_max_rpcs_in_flight = 3;
387 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
388 cli->cl_max_rpcs_in_flight = 4;
390 if (osc_on_mdt(obddev->obd_name))
391 cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
393 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
397 CERROR("ldlm_get_ref failed: %d\n", rc);
401 ptlrpc_init_client(rq_portal, rp_portal, name,
402 &obddev->obd_ldlm_client);
404 imp = class_new_import(obddev);
406 GOTO(err_ldlm, rc = -ENOENT);
407 imp->imp_client = &obddev->obd_ldlm_client;
408 imp->imp_connect_op = connect_op;
409 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
410 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
411 LUSTRE_CFG_BUFLEN(lcfg, 1));
412 class_import_put(imp);
414 rc = client_import_add_conn(imp, &server_uuid, 1);
416 CERROR("can't add initial connection\n");
417 GOTO(err_import, rc);
420 cli->cl_import = imp;
421 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
422 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
423 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
425 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
426 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
427 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
428 name, obddev->obd_name,
429 cli->cl_target_uuid.uuid);
430 cfs_spin_lock(&imp->imp_lock);
431 imp->imp_deactive = 1;
432 cfs_spin_unlock(&imp->imp_lock);
436 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
437 LDLM_NAMESPACE_CLIENT,
438 LDLM_NAMESPACE_GREEDY,
440 if (obddev->obd_namespace == NULL) {
441 CERROR("Unable to create client namespace - %s\n",
443 GOTO(err_import, rc = -ENOMEM);
446 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
451 class_destroy_import(imp);
459 int client_obd_cleanup(struct obd_device *obddev)
463 ldlm_namespace_free_post(obddev->obd_namespace);
464 obddev->obd_namespace = NULL;
466 LASSERT(obddev->u.cli.cl_import == NULL);
472 /* ->o_connect() method for client side (OSC and MDC and MGC) */
473 int client_connect_import(const struct lu_env *env,
474 struct obd_export **exp,
475 struct obd_device *obd, struct obd_uuid *cluuid,
476 struct obd_connect_data *data, void *localdata)
478 struct client_obd *cli = &obd->u.cli;
479 struct obd_import *imp = cli->cl_import;
480 struct obd_connect_data *ocd;
481 struct lustre_handle conn = { 0 };
486 cfs_down_write(&cli->cl_sem);
487 if (cli->cl_conn_count > 0 )
488 GOTO(out_sem, rc = -EALREADY);
490 rc = class_connect(&conn, obd, cluuid);
494 cli->cl_conn_count++;
495 *exp = class_conn2export(&conn);
497 LASSERT(obd->obd_namespace);
499 imp->imp_dlm_handle = conn;
500 rc = ptlrpc_init_import(imp);
504 ocd = &imp->imp_connect_data;
507 imp->imp_connect_flags_orig = data->ocd_connect_flags;
510 rc = ptlrpc_connect_import(imp);
512 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
515 LASSERT((*exp)->exp_connection);
518 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
519 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
520 data->ocd_connect_flags, ocd->ocd_connect_flags);
521 data->ocd_connect_flags = ocd->ocd_connect_flags;
524 ptlrpc_pinger_add_import(imp);
530 cli->cl_conn_count--;
531 class_disconnect(*exp);
535 cfs_up_write(&cli->cl_sem);
540 int client_disconnect_export(struct obd_export *exp)
542 struct obd_device *obd = class_exp2obd(exp);
543 struct client_obd *cli;
544 struct obd_import *imp;
549 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
550 exp, exp ? exp->exp_handle.h_cookie : -1);
555 imp = cli->cl_import;
557 cfs_down_write(&cli->cl_sem);
558 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
561 if (!cli->cl_conn_count) {
562 CERROR("disconnecting disconnected device (%s)\n",
564 GOTO(out_disconnect, rc = -EINVAL);
567 cli->cl_conn_count--;
568 if (cli->cl_conn_count)
569 GOTO(out_disconnect, rc = 0);
571 /* Mark import deactivated now, so we don't try to reconnect if any
572 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
573 * fully deactivate the import, or that would drop all requests. */
574 cfs_spin_lock(&imp->imp_lock);
575 imp->imp_deactive = 1;
576 cfs_spin_unlock(&imp->imp_lock);
578 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
579 * delete it regardless. (It's safe to delete an import that was
581 (void)ptlrpc_pinger_del_import(imp);
583 if (obd->obd_namespace != NULL) {
584 /* obd_force == local only */
585 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
586 obd->obd_force ? LCF_LOCAL : 0, NULL);
587 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
591 * there's no need to hold sem during disconnecting an import,
592 * and actually it may cause deadlock in gss.
594 cfs_up_write(&cli->cl_sem);
595 rc = ptlrpc_disconnect_import(imp, 0);
596 cfs_down_write(&cli->cl_sem);
598 ptlrpc_invalidate_import(imp);
603 /* use server style - class_disconnect should be always called for
605 err = class_disconnect(exp);
609 cfs_up_write(&cli->cl_sem);
614 #ifdef HAVE_SERVER_SUPPORT
615 int server_disconnect_export(struct obd_export *exp)
620 /* Disconnect early so that clients can't keep using export */
621 rc = class_disconnect(exp);
622 /* close import for avoid sending any requests */
623 if (exp->exp_imp_reverse)
624 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
626 if (exp->exp_obd->obd_namespace != NULL)
627 ldlm_cancel_locks_for_export(exp);
629 /* complete all outstanding replies */
630 cfs_spin_lock(&exp->exp_lock);
631 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
632 struct ptlrpc_reply_state *rs =
633 cfs_list_entry(exp->exp_outstanding_replies.next,
634 struct ptlrpc_reply_state, rs_exp_list);
635 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
637 cfs_spin_lock(&svcpt->scp_rep_lock);
639 cfs_list_del_init(&rs->rs_exp_list);
640 cfs_spin_lock(&rs->rs_lock);
641 ptlrpc_schedule_difficult_reply(rs);
642 cfs_spin_unlock(&rs->rs_lock);
644 cfs_spin_unlock(&svcpt->scp_rep_lock);
646 cfs_spin_unlock(&exp->exp_lock);
651 /* --------------------------------------------------------------------------
652 * from old lib/target.c
653 * -------------------------------------------------------------------------- */
655 static int target_handle_reconnect(struct lustre_handle *conn,
656 struct obd_export *exp,
657 struct obd_uuid *cluuid)
661 if (exp->exp_connection && exp->exp_imp_reverse) {
662 struct lustre_handle *hdl;
663 struct obd_device *target;
665 hdl = &exp->exp_imp_reverse->imp_remote_handle;
666 target = exp->exp_obd;
668 /* Might be a re-connect after a partition. */
669 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
670 if (target->obd_recovering) {
671 int timeout = cfs_duration_sec(cfs_time_sub(
673 &target->obd_recovery_timer),
674 cfs_time_current()));
676 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
677 "ing, waiting for %d clients in recov"
678 "ery for %d:%.02d\n", target->obd_name,
679 obd_uuid2str(&exp->exp_client_uuid),
680 obd_export_nid2str(exp),
681 target->obd_max_recoverable_clients,
682 timeout / 60, timeout % 60);
684 LCONSOLE_WARN("%s: Client %s (at %s) "
685 "reconnecting\n", target->obd_name,
686 obd_uuid2str(&exp->exp_client_uuid),
687 obd_export_nid2str(exp));
690 conn->cookie = exp->exp_handle.h_cookie;
691 /* target_handle_connect() treats EALREADY and
692 * -EALREADY differently. EALREADY means we are
693 * doing a valid reconnect from the same client. */
696 LCONSOLE_WARN("%s: already connected client %s (at %s) "
697 "with handle "LPX64". Rejecting client "
698 "with the same UUID trying to reconnect "
699 "with handle "LPX64"\n", target->obd_name,
700 obd_uuid2str(&exp->exp_client_uuid),
701 obd_export_nid2str(exp),
702 hdl->cookie, conn->cookie);
703 memset(conn, 0, sizeof *conn);
704 /* target_handle_connect() treats EALREADY and
705 * -EALREADY differently. -EALREADY is an error
706 * (same UUID, different handle). */
711 conn->cookie = exp->exp_handle.h_cookie;
712 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
713 cluuid->uuid, exp, conn->cookie);
717 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
720 struct obd_export *exp = cb_data;
722 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
723 obd->obd_name, exp->exp_client_uuid.uuid);
725 cfs_spin_lock(&exp->exp_lock);
726 exp->exp_need_sync = 0;
727 cfs_spin_unlock(&exp->exp_lock);
728 class_export_cb_put(exp);
730 EXPORT_SYMBOL(target_client_add_cb);
734 check_and_start_recovery_timer(struct obd_device *obd,
735 struct ptlrpc_request *req, int new_client);
738 check_and_start_recovery_timer(struct obd_device *obd,
739 struct ptlrpc_request *req, int new_client)
744 int target_handle_connect(struct ptlrpc_request *req)
746 struct obd_device *target = NULL, *targref = NULL;
747 struct obd_export *export = NULL;
748 struct obd_import *revimp;
749 struct obd_import *tmp_imp = NULL;
750 struct lustre_handle conn;
751 struct lustre_handle *tmp;
752 struct obd_uuid tgtuuid;
753 struct obd_uuid cluuid;
754 struct obd_uuid remote_uuid;
759 bool mds_conn = false, lw_client = false;
760 struct obd_connect_data *data, *tmpdata;
762 lnet_nid_t *client_nid = NULL;
765 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
767 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
769 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
770 GOTO(out, rc = -EINVAL);
773 obd_str2uuid(&tgtuuid, str);
774 target = class_uuid2obd(&tgtuuid);
776 target = class_name2obd(str);
779 deuuidify(str, NULL, &target_start, &target_len);
780 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available for "
781 "connect (no target)\n", str);
782 GOTO(out, rc = -ENODEV);
785 cfs_spin_lock(&target->obd_dev_lock);
786 if (target->obd_stopping || !target->obd_set_up) {
787 cfs_spin_unlock(&target->obd_dev_lock);
789 deuuidify(str, NULL, &target_start, &target_len);
790 LCONSOLE_ERROR_MSG(0x137, "%.*s: Not available for connect "
791 "from %s (%s)\n", target_len, target_start,
792 libcfs_nid2str(req->rq_peer.nid),
793 (target->obd_stopping ?
794 "stopping" : "not set up"));
795 GOTO(out, rc = -ENODEV);
798 if (target->obd_no_conn) {
799 cfs_spin_unlock(&target->obd_dev_lock);
801 LCONSOLE_WARN("%s: Temporarily refusing client connection "
802 "from %s\n", target->obd_name,
803 libcfs_nid2str(req->rq_peer.nid));
804 GOTO(out, rc = -EAGAIN);
807 /* Make sure the target isn't cleaned up while we're here. Yes,
808 there's still a race between the above check and our incref here.
809 Really, class_uuid2obd should take the ref. */
810 targref = class_incref(target, __FUNCTION__, cfs_current());
812 target->obd_conn_inprogress++;
813 cfs_spin_unlock(&target->obd_dev_lock);
815 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
817 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
818 GOTO(out, rc = -EINVAL);
821 obd_str2uuid(&cluuid, str);
823 /* XXX extract a nettype and format accordingly */
824 switch (sizeof(lnet_nid_t)) {
825 /* NB the casts only avoid compiler warnings */
827 snprintf(remote_uuid.uuid, sizeof remote_uuid,
828 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
831 snprintf(remote_uuid.uuid, sizeof remote_uuid,
832 "NET_%x_UUID", (__u32)req->rq_peer.nid);
838 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
840 GOTO(out, rc = -EPROTO);
844 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
846 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
848 GOTO(out, rc = -EPROTO);
850 rc = req_capsule_server_pack(&req->rq_pill);
854 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
856 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
857 "libclient connection attempt");
858 GOTO(out, rc = -EPROTO);
859 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
860 LUSTRE_VERSION_ALLOWED_OFFSET ||
861 data->ocd_version > LUSTRE_VERSION_CODE +
862 LUSTRE_VERSION_ALLOWED_OFFSET) {
863 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
864 "libclient connection attempt",
865 data->ocd_version < LUSTRE_VERSION_CODE ?
867 OBD_OCD_VERSION_MAJOR(data->ocd_version),
868 OBD_OCD_VERSION_MINOR(data->ocd_version),
869 OBD_OCD_VERSION_PATCH(data->ocd_version),
870 OBD_OCD_VERSION_FIX(data->ocd_version));
871 data = req_capsule_server_sized_get(&req->rq_pill,
873 offsetof(typeof(*data), ocd_version) +
874 sizeof(data->ocd_version));
876 data->ocd_connect_flags = OBD_CONNECT_VERSION;
877 data->ocd_version = LUSTRE_VERSION_CODE;
879 GOTO(out, rc = -EPROTO);
883 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
884 (data->ocd_connect_flags & OBD_CONNECT_MDS))
887 if ((data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
890 /* lctl gets a backstage, all-access pass. */
891 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
892 goto dont_check_exports;
894 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
898 /* we've found an export in the hash */
900 cfs_spin_lock(&export->exp_lock);
902 if (export->exp_connecting) { /* bug 9635, et. al. */
903 cfs_spin_unlock(&export->exp_lock);
904 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
905 export->exp_obd->obd_name, export,
906 libcfs_nid2str(req->rq_peer.nid));
907 class_export_put(export);
910 } else if (mds_conn && export->exp_connection) {
911 cfs_spin_unlock(&export->exp_lock);
912 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
913 /* mds reconnected after failover */
914 LCONSOLE_WARN("%s: Received MDS connection from "
915 "%s, removing former export from %s\n",
916 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
917 libcfs_nid2str(export->exp_connection->c_peer.nid));
919 /* new mds connection from the same nid */
920 LCONSOLE_WARN("%s: Received new MDS connection from "
921 "%s, removing former export from same NID\n",
922 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
923 class_fail_export(export);
924 class_export_put(export);
927 } else if (export->exp_connection != NULL &&
928 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
929 (lustre_msg_get_op_flags(req->rq_reqmsg) &
930 MSG_CONNECT_INITIAL)) {
931 cfs_spin_unlock(&export->exp_lock);
932 /* in mds failover we have static uuid but nid can be
934 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
935 "existing nid %s is already connected\n",
936 target->obd_name, cluuid.uuid,
937 libcfs_nid2str(req->rq_peer.nid),
939 export->exp_connection->c_peer.nid));
941 class_export_put(export);
944 export->exp_connecting = 1;
945 cfs_spin_unlock(&export->exp_lock);
946 LASSERT(export->exp_obd == target);
948 rc = target_handle_reconnect(&conn, export, &cluuid);
951 /* If we found an export, we already unlocked. */
954 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
955 } else if (req->rq_export == NULL &&
956 cfs_atomic_read(&export->exp_rpc_count) > 0) {
957 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
958 "still busy with %d references\n",
959 target->obd_name, cluuid.uuid,
960 libcfs_nid2str(req->rq_peer.nid),
961 cfs_atomic_read(&export->exp_refcount));
962 GOTO(out, rc = -EBUSY);
963 } else if (req->rq_export != NULL &&
964 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
965 /* the current connect rpc has increased exp_rpc_count */
966 LCONSOLE_WARN("%s: Client %s (at %s) refused reconnection, "
967 "still busy with %d active RPCs\n",
968 target->obd_name, cluuid.uuid,
969 libcfs_nid2str(req->rq_peer.nid),
970 cfs_atomic_read(&export->exp_rpc_count) - 1);
971 cfs_spin_lock(&export->exp_lock);
972 if (req->rq_export->exp_conn_cnt <
973 lustre_msg_get_conn_cnt(req->rq_reqmsg))
974 /* try to abort active requests */
975 req->rq_export->exp_abort_active_req = 1;
976 cfs_spin_unlock(&export->exp_lock);
977 GOTO(out, rc = -EBUSY);
978 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
979 if (!strstr(cluuid.uuid, "mdt"))
980 LCONSOLE_WARN("%s: Rejecting reconnect from the "
981 "known client %s (at %s) because it "
982 "is indicating it is a new client",
983 target->obd_name, cluuid.uuid,
984 libcfs_nid2str(req->rq_peer.nid));
985 GOTO(out, rc = -EALREADY);
987 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
994 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
995 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
996 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
997 export, (long)cfs_time_current_sec(),
998 export ? (long)export->exp_last_request_time : 0);
1000 /* If this is the first time a client connects, reset the recovery
1001 * timer. Discard lightweight connections which might be local */
1002 if (!lw_client && rc == 0 && target->obd_recovering)
1003 check_and_start_recovery_timer(target, req, export == NULL);
1005 /* We want to handle EALREADY but *not* -EALREADY from
1006 * target_handle_reconnect(), return reconnection state in a flag */
1007 if (rc == EALREADY) {
1008 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1014 /* Tell the client if we support replayable requests */
1015 if (target->obd_replayable)
1016 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1017 client_nid = &req->rq_peer.nid;
1019 if (export == NULL) {
1020 /* allow lightweight connections during recovery */
1021 if (target->obd_recovering && !lw_client) {
1023 int c; /* connected */
1024 int i; /* in progress */
1027 c = cfs_atomic_read(&target->obd_connected_clients);
1028 i = cfs_atomic_read(&target->obd_lock_replay_clients);
1029 k = target->obd_max_recoverable_clients;
1030 t = cfs_timer_deadline(&target->obd_recovery_timer);
1031 t = cfs_time_sub(t, cfs_time_current());
1032 t = cfs_duration_sec(t);
1033 LCONSOLE_WARN("%s: Denying connection for new client "
1034 "%s (at %s), waiting for all %d known "
1035 "clients (%d recovered, %d in progress, "
1036 "and %d unseen) to recover in %d:%.02d\n",
1037 target->obd_name, cluuid.uuid,
1038 libcfs_nid2str(req->rq_peer.nid), k,
1039 c - i, i, k - c, (int)t / 60,
1044 rc = obd_connect(req->rq_svc_thread->t_env,
1045 &export, target, &cluuid, data,
1048 conn.cookie = export->exp_handle.h_cookie;
1051 rc = obd_reconnect(req->rq_svc_thread->t_env,
1052 export, target, &cluuid, data, client_nid);
1057 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 50, 0)
1058 /* 2.2.0 clients always swab nidtbl entries due to a bug, so server
1059 * will do the swabbing for if the client is using the same endianness.
1061 * This fixup is version-limited, because we don't want to carry the
1062 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we need
1063 * interop with unpatched 2.2 clients. For newer clients, servers
1064 * will never do MNE swabbing, let the client handle that. LU-1644 */
1065 export->exp_need_mne_swab = !ptlrpc_req_need_swab(req) &&
1066 !(data->ocd_connect_flags & OBD_CONNECT_MNE_SWAB);
1068 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and exp_need_mne_swab"
1071 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1072 data->ocd_instance = target->u.obt.obt_instance;
1074 /* Return only the parts of obd_connect_data that we understand, so the
1075 * client knows that we don't understand the rest. */
1077 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1079 tmpdata = req_capsule_server_get(&req->rq_pill,
1081 /* Don't use struct assignment here, because the client reply
1082 * buffer may be smaller/larger than the local struct
1083 * obd_connect_data. */
1084 memcpy(tmpdata, data, min(tmpsize, size));
1087 /* If all else goes well, this is our RPC return code. */
1090 lustre_msg_set_handle(req->rq_repmsg, &conn);
1092 /* If the client and the server are the same node, we will already
1093 * have an export that really points to the client's DLM export,
1094 * because we have a shared handles table.
1096 * XXX this will go away when shaver stops sending the "connect" handle
1097 * in the real "remote handle" field of the request --phik 24 Apr 2003
1099 if (req->rq_export != NULL)
1100 class_export_put(req->rq_export);
1102 /* request takes one export refcount */
1103 req->rq_export = class_export_get(export);
1105 cfs_spin_lock(&export->exp_lock);
1106 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1107 cfs_spin_unlock(&export->exp_lock);
1108 CDEBUG(D_RPCTRACE, "%s: %s already connected at higher "
1109 "conn_cnt: %d > %d\n",
1110 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1111 export->exp_conn_cnt,
1112 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1114 GOTO(out, rc = -EALREADY);
1116 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1117 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1118 export->exp_abort_active_req = 0;
1120 /* request from liblustre? Don't evict it for not pinging. */
1121 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1122 export->exp_libclient = 1;
1123 cfs_spin_unlock(&export->exp_lock);
1125 cfs_spin_lock(&target->obd_dev_lock);
1126 cfs_list_del_init(&export->exp_obd_chain_timed);
1127 cfs_spin_unlock(&target->obd_dev_lock);
1129 cfs_spin_unlock(&export->exp_lock);
1132 if (export->exp_connection != NULL) {
1133 /* Check to see if connection came from another NID */
1134 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1135 !cfs_hlist_unhashed(&export->exp_nid_hash))
1136 cfs_hash_del(export->exp_obd->obd_nid_hash,
1137 &export->exp_connection->c_peer.nid,
1138 &export->exp_nid_hash);
1140 ptlrpc_connection_put(export->exp_connection);
1143 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1146 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1147 cfs_hash_add(export->exp_obd->obd_nid_hash,
1148 &export->exp_connection->c_peer.nid,
1149 &export->exp_nid_hash);
1152 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1154 __u64 transno = data->ocd_transno;
1156 cfs_spin_lock(&export->exp_lock);
1157 /* possible race with class_disconnect_stale_exports,
1158 * export may be already in the eviction process */
1159 if (export->exp_failed) {
1160 cfs_spin_unlock(&export->exp_lock);
1161 GOTO(out, rc = -ENODEV);
1163 export->exp_in_recovery = 1;
1164 export->exp_req_replay_needed = 1;
1165 export->exp_lock_replay_needed = 1;
1166 cfs_spin_unlock(&export->exp_lock);
1168 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1169 MSG_CONNECT_TRANSNO);
1170 if (has_transno && transno == 0)
1171 CWARN("Connect with zero transno!\n");
1173 if (has_transno && transno > 0 &&
1174 transno < target->obd_next_recovery_transno &&
1175 transno > target->obd_last_committed) {
1176 /* another way is to use cmpxchg() so it will be
1178 cfs_spin_lock(&target->obd_recovery_task_lock);
1179 if (transno < target->obd_next_recovery_transno)
1180 target->obd_next_recovery_transno = transno;
1181 cfs_spin_unlock(&target->obd_recovery_task_lock);
1184 cfs_atomic_inc(&target->obd_req_replay_clients);
1185 cfs_atomic_inc(&target->obd_lock_replay_clients);
1186 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1187 target->obd_max_recoverable_clients)
1188 cfs_waitq_signal(&target->obd_next_transno_waitq);
1191 /* Tell the client we're in recovery, when client is involved in it. */
1192 if (target->obd_recovering && !lw_client)
1193 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1195 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1198 /* for the rest part, we return -ENOTCONN in case of errors
1199 * in order to let client initialize connection again.
1201 revimp = class_new_import(target);
1202 if (revimp == NULL) {
1203 CERROR("fail to alloc new reverse import.\n");
1204 GOTO(out, rc = -ENOTCONN);
1207 cfs_spin_lock(&export->exp_lock);
1208 if (export->exp_imp_reverse != NULL) {
1209 /* destroyed import can be still referenced in ctxt */
1210 obd_set_info_async(req->rq_svc_thread->t_env, export,
1211 sizeof(KEY_REVIMP_UPD), KEY_REVIMP_UPD,
1213 tmp_imp = export->exp_imp_reverse;
1215 export->exp_imp_reverse = revimp;
1216 cfs_spin_unlock(&export->exp_lock);
1218 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1219 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1220 revimp->imp_remote_handle = conn;
1221 revimp->imp_dlm_fake = 1;
1222 revimp->imp_state = LUSTRE_IMP_FULL;
1224 /* unknown versions will be caught in
1225 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
1226 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1228 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
1229 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1230 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1232 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1234 if ((export->exp_connect_flags & OBD_CONNECT_FULL20) &&
1235 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1236 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1238 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1240 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1242 CERROR("Failed to get sec for reverse import: %d\n", rc);
1243 cfs_spin_lock(&export->exp_lock);
1244 export->exp_imp_reverse = NULL;
1245 cfs_spin_unlock(&export->exp_lock);
1246 class_destroy_import(revimp);
1249 class_import_put(revimp);
1252 if (tmp_imp != NULL)
1253 client_destroy_import(tmp_imp);
1255 cfs_spin_lock(&export->exp_lock);
1256 export->exp_connecting = 0;
1257 cfs_spin_unlock(&export->exp_lock);
1259 class_export_put(export);
1262 cfs_spin_lock(&target->obd_dev_lock);
1263 target->obd_conn_inprogress--;
1264 cfs_spin_unlock(&target->obd_dev_lock);
1266 class_decref(targref, __FUNCTION__, cfs_current());
1269 req->rq_status = rc;
1273 int target_handle_disconnect(struct ptlrpc_request *req)
1278 rc = req_capsule_server_pack(&req->rq_pill);
1282 /* keep the rq_export around so we can send the reply */
1283 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1288 void target_destroy_export(struct obd_export *exp)
1290 struct obd_import *imp = NULL;
1291 /* exports created from last_rcvd data, and "fake"
1292 exports created by lctl don't have an import */
1293 cfs_spin_lock(&exp->exp_lock);
1294 if (exp->exp_imp_reverse != NULL) {
1295 imp = exp->exp_imp_reverse;
1296 exp->exp_imp_reverse = NULL;
1298 cfs_spin_unlock(&exp->exp_lock);
1300 client_destroy_import(imp);
1302 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1303 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1304 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1305 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1309 * Recovery functions
1311 static void target_request_copy_get(struct ptlrpc_request *req)
1313 class_export_rpc_get(req->rq_export);
1314 LASSERT(cfs_list_empty(&req->rq_list));
1315 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1317 /* increase refcount to keep request in queue */
1318 cfs_atomic_inc(&req->rq_refcount);
1319 /** let export know it has replays to be handled */
1320 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1323 static void target_request_copy_put(struct ptlrpc_request *req)
1325 LASSERT(cfs_list_empty(&req->rq_replay_list));
1326 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1328 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1329 class_export_rpc_put(req->rq_export);
1330 ptlrpc_server_drop_request(req);
1333 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1335 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1336 struct obd_export *exp = req->rq_export;
1337 struct ptlrpc_request *reqiter;
1342 cfs_spin_lock(&exp->exp_lock);
1343 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1345 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1352 /* we expect it with RESENT and REPLAY flags */
1353 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1354 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1355 CERROR("invalid flags %x of resent replay\n",
1356 lustre_msg_get_flags(req->rq_reqmsg));
1358 cfs_list_add_tail(&req->rq_replay_list,
1359 &exp->exp_req_replay_queue);
1362 cfs_spin_unlock(&exp->exp_lock);
1366 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1368 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1369 LASSERT(req->rq_export);
1371 cfs_spin_lock(&req->rq_export->exp_lock);
1372 cfs_list_del_init(&req->rq_replay_list);
1373 cfs_spin_unlock(&req->rq_export->exp_lock);
1377 static void target_finish_recovery(struct obd_device *obd)
1379 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1380 obd->obd_recovery_start);
1383 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1384 "%d recovered and %d %s evicted.\n", obd->obd_name,
1385 (int)elapsed_time / 60, (int)elapsed_time % 60,
1386 obd->obd_max_recoverable_clients,
1387 cfs_atomic_read(&obd->obd_connected_clients),
1388 obd->obd_stale_clients,
1389 obd->obd_stale_clients == 1 ? "was" : "were");
1391 ldlm_reprocess_all_ns(obd->obd_namespace);
1392 cfs_spin_lock(&obd->obd_recovery_task_lock);
1393 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1394 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1395 !cfs_list_empty(&obd->obd_final_req_queue)) {
1396 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1398 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1399 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1401 cfs_list_empty(&obd->obd_final_req_queue) ? \
1403 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1406 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1408 obd->obd_recovery_end = cfs_time_current_sec();
1410 /* when recovery finished, cleanup orphans on mds and ost */
1411 if (OBT(obd) && OBP(obd, postrecov)) {
1412 int rc = OBP(obd, postrecov)(obd);
1414 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1420 static void abort_req_replay_queue(struct obd_device *obd)
1422 struct ptlrpc_request *req, *n;
1423 cfs_list_t abort_list;
1425 CFS_INIT_LIST_HEAD(&abort_list);
1426 cfs_spin_lock(&obd->obd_recovery_task_lock);
1427 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1428 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1429 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1430 DEBUG_REQ(D_WARNING, req, "aborted:");
1431 req->rq_status = -ENOTCONN;
1432 if (ptlrpc_error(req)) {
1433 DEBUG_REQ(D_ERROR, req,
1434 "failed abort_req_reply; skipping");
1436 target_exp_dequeue_req_replay(req);
1437 target_request_copy_put(req);
1441 static void abort_lock_replay_queue(struct obd_device *obd)
1443 struct ptlrpc_request *req, *n;
1444 cfs_list_t abort_list;
1446 CFS_INIT_LIST_HEAD(&abort_list);
1447 cfs_spin_lock(&obd->obd_recovery_task_lock);
1448 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1449 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1450 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1451 DEBUG_REQ(D_ERROR, req, "aborted:");
1452 req->rq_status = -ENOTCONN;
1453 if (ptlrpc_error(req)) {
1454 DEBUG_REQ(D_ERROR, req,
1455 "failed abort_lock_reply; skipping");
1457 target_request_copy_put(req);
1461 /* Called from a cleanup function if the device is being cleaned up
1462 forcefully. The exports should all have been disconnected already,
1463 the only thing left to do is
1464 - clear the recovery flags
1466 - free queued requests and replies, but don't send replies
1467 Because the obd_stopping flag is set, no new requests should be received.
1470 void target_cleanup_recovery(struct obd_device *obd)
1472 struct ptlrpc_request *req, *n;
1473 cfs_list_t clean_list;
1476 CFS_INIT_LIST_HEAD(&clean_list);
1477 cfs_spin_lock(&obd->obd_dev_lock);
1478 if (!obd->obd_recovering) {
1479 cfs_spin_unlock(&obd->obd_dev_lock);
1483 obd->obd_recovering = obd->obd_abort_recovery = 0;
1484 cfs_spin_unlock(&obd->obd_dev_lock);
1486 cfs_spin_lock(&obd->obd_recovery_task_lock);
1487 target_cancel_recovery_timer(obd);
1488 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1489 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1491 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1492 LASSERT(req->rq_reply_state == 0);
1493 target_exp_dequeue_req_replay(req);
1494 target_request_copy_put(req);
1497 cfs_spin_lock(&obd->obd_recovery_task_lock);
1498 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1499 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1500 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1502 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1503 LASSERT(req->rq_reply_state == 0);
1504 target_request_copy_put(req);
1510 /* obd_recovery_task_lock should be held */
1511 void target_cancel_recovery_timer(struct obd_device *obd)
1513 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1514 cfs_timer_disarm(&obd->obd_recovery_timer);
1517 static void target_start_recovery_timer(struct obd_device *obd)
1519 if (obd->obd_recovery_start != 0)
1522 cfs_spin_lock(&obd->obd_dev_lock);
1523 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1524 cfs_spin_unlock(&obd->obd_dev_lock);
1528 LASSERT(obd->obd_recovery_timeout != 0);
1530 if (obd->obd_recovery_start != 0) {
1531 cfs_spin_unlock(&obd->obd_dev_lock);
1535 cfs_timer_arm(&obd->obd_recovery_timer,
1536 cfs_time_shift(obd->obd_recovery_timeout));
1537 obd->obd_recovery_start = cfs_time_current_sec();
1538 cfs_spin_unlock(&obd->obd_dev_lock);
1540 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1541 "or until %d client%s reconnect%s\n",
1543 obd->obd_recovery_timeout / 60,
1544 obd->obd_recovery_timeout % 60,
1545 obd->obd_max_recoverable_clients,
1546 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1547 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1551 * extend recovery window.
1553 * if @extend is true, extend recovery window to have @drt remaining at least;
1554 * otherwise, make sure the recovery timeout value is not less than @drt.
1556 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1560 cfs_duration_t left;
1563 cfs_spin_lock(&obd->obd_dev_lock);
1564 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1565 cfs_spin_unlock(&obd->obd_dev_lock);
1568 LASSERT(obd->obd_recovery_start != 0);
1570 now = cfs_time_current_sec();
1571 to = obd->obd_recovery_timeout;
1572 end = obd->obd_recovery_start + to;
1573 left = cfs_time_sub(end, now);
1575 if (extend && (drt > left)) {
1577 } else if (!extend && (drt > to)) {
1579 /* reduce drt by already passed time */
1580 drt -= obd->obd_recovery_timeout - left;
1583 if (to > obd->obd_recovery_time_hard)
1584 to = obd->obd_recovery_time_hard;
1585 if (obd->obd_recovery_timeout < to) {
1586 obd->obd_recovery_timeout = to;
1587 cfs_timer_arm(&obd->obd_recovery_timer,
1588 cfs_time_shift(drt));
1590 cfs_spin_unlock(&obd->obd_dev_lock);
1592 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1593 obd->obd_name, (unsigned)drt);
1596 /* Reset the timer with each new client connection */
1598 * This timer is actually reconnect_timer, which is for making sure
1599 * the total recovery window is at least as big as my reconnect
1600 * attempt timing. So the initial recovery time_out will be set to
1601 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1602 * from client is bigger than this, then the recovery time_out will
1603 * be extended to make sure the client could be reconnected, in the
1604 * process, the timeout from the new client should be ignored.
1608 check_and_start_recovery_timer(struct obd_device *obd,
1609 struct ptlrpc_request *req,
1612 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1613 struct obd_device_target *obt = &obd->u.obt;
1614 struct lustre_sb_info *lsi;
1616 if (!new_client && service_time)
1617 /* Teach server about old server's estimates, as first guess
1618 * at how long new requests will take. */
1619 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1622 target_start_recovery_timer(obd);
1624 /* convert the service time to rpc timeout,
1625 * reuse service_time to limit stack usage */
1626 service_time = at_est2timeout(service_time);
1628 /* We expect other clients to timeout within service_time, then try
1629 * to reconnect, then try the failover server. The max delay between
1630 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL */
1631 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1633 LASSERT(obt->obt_magic == OBT_MAGIC);
1634 lsi = s2lsi(obt->obt_sb);
1635 if (!(lsi->lsi_flags | LDD_F_IR_CAPABLE))
1636 service_time += 2 * (CONNECTION_SWITCH_MAX +
1637 CONNECTION_SWITCH_INC);
1638 if (service_time > obd->obd_recovery_timeout && !new_client)
1639 extend_recovery_timer(obd, service_time, false);
1642 /** Health checking routines */
1643 static inline int exp_connect_healthy(struct obd_export *exp)
1645 return (exp->exp_in_recovery);
1648 /** if export done req_replay or has replay in queue */
1649 static inline int exp_req_replay_healthy(struct obd_export *exp)
1651 return (!exp->exp_req_replay_needed ||
1652 cfs_atomic_read(&exp->exp_replay_count) > 0);
1654 /** if export done lock_replay or has replay in queue */
1655 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1657 return (!exp->exp_lock_replay_needed ||
1658 cfs_atomic_read(&exp->exp_replay_count) > 0);
1661 static inline int exp_vbr_healthy(struct obd_export *exp)
1663 return (!exp->exp_vbr_failed);
1666 static inline int exp_finished(struct obd_export *exp)
1668 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1671 /** Checking routines for recovery */
1672 static int check_for_clients(struct obd_device *obd)
1674 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1676 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1678 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1679 if (obd->obd_no_conn == 0 &&
1680 clnts + obd->obd_stale_clients == obd->obd_max_recoverable_clients)
1685 static int check_for_next_transno(struct obd_device *obd)
1687 struct ptlrpc_request *req = NULL;
1688 int wake_up = 0, connected, completed, queue_len;
1689 __u64 next_transno, req_transno;
1692 cfs_spin_lock(&obd->obd_recovery_task_lock);
1693 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1694 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1695 struct ptlrpc_request, rq_list);
1696 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1701 connected = cfs_atomic_read(&obd->obd_connected_clients);
1702 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1703 queue_len = obd->obd_requests_queued_for_recovery;
1704 next_transno = obd->obd_next_recovery_transno;
1706 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1707 "req_transno: "LPU64", next_transno: "LPU64"\n",
1708 obd->obd_max_recoverable_clients, connected, completed,
1709 queue_len, req_transno, next_transno);
1711 if (obd->obd_abort_recovery) {
1712 CDEBUG(D_HA, "waking for aborted recovery\n");
1714 } else if (obd->obd_recovery_expired) {
1715 CDEBUG(D_HA, "waking for expired recovery\n");
1717 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1718 CDEBUG(D_HA, "waking for completed recovery\n");
1720 } else if (req_transno == next_transno) {
1721 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1723 } else if (queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1725 /** handle gaps occured due to lost reply or VBR */
1726 LASSERTF(req_transno >= next_transno,
1727 "req_transno: "LPU64", next_transno: "LPU64"\n",
1728 req_transno, next_transno);
1729 if (req_transno > obd->obd_last_committed &&
1730 !obd->obd_version_recov)
1733 "%s: waking for gap in transno, VBR is %s (skip: "
1734 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1735 ", last_committed: "LPD64")\n",
1736 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1737 next_transno, queue_len, completed, connected,
1738 req_transno, obd->obd_last_committed);
1739 obd->obd_next_recovery_transno = req_transno;
1741 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1742 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1743 " by fail_lock, waking up ("LPD64")\n", next_transno);
1744 obd->obd_next_recovery_transno = req_transno;
1747 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1751 static int check_for_next_lock(struct obd_device *obd)
1755 cfs_spin_lock(&obd->obd_recovery_task_lock);
1756 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1757 CDEBUG(D_HA, "waking for next lock\n");
1759 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1760 CDEBUG(D_HA, "waking for completed lock replay\n");
1762 } else if (obd->obd_abort_recovery) {
1763 CDEBUG(D_HA, "waking for aborted recovery\n");
1765 } else if (obd->obd_recovery_expired) {
1766 CDEBUG(D_HA, "waking for expired recovery\n");
1769 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1775 * wait for recovery events,
1776 * check its status with help of check_routine
1777 * evict dead clients via health_check
1779 static int target_recovery_overseer(struct obd_device *obd,
1780 int (*check_routine)(struct obd_device *),
1781 int (*health_check)(struct obd_export *))
1784 cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1785 if (obd->obd_abort_recovery) {
1786 CWARN("recovery is aborted, evict exports in recovery\n");
1787 /** evict exports which didn't finish recovery yet */
1788 class_disconnect_stale_exports(obd, exp_finished);
1790 } else if (obd->obd_recovery_expired) {
1791 obd->obd_recovery_expired = 0;
1792 /** If some clients died being recovered, evict them */
1793 LCONSOLE_WARN("%s: recovery is timed out, "
1794 "evict stale exports\n", obd->obd_name);
1795 /** evict cexports with no replay in queue, they are stalled */
1796 class_disconnect_stale_exports(obd, health_check);
1797 /** continue with VBR */
1798 cfs_spin_lock(&obd->obd_dev_lock);
1799 obd->obd_version_recov = 1;
1800 cfs_spin_unlock(&obd->obd_dev_lock);
1802 * reset timer, recovery will proceed with versions now,
1803 * timeout is set just to handle reconnection delays
1805 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1806 /** Wait for recovery events again, after evicting bad clients */
1812 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1814 struct ptlrpc_request *req = NULL;
1817 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1818 obd->obd_next_recovery_transno);
1820 if (target_recovery_overseer(obd, check_for_next_transno,
1821 exp_req_replay_healthy)) {
1822 abort_req_replay_queue(obd);
1823 abort_lock_replay_queue(obd);
1826 cfs_spin_lock(&obd->obd_recovery_task_lock);
1827 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1828 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1829 struct ptlrpc_request, rq_list);
1830 cfs_list_del_init(&req->rq_list);
1831 obd->obd_requests_queued_for_recovery--;
1832 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1834 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1835 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1836 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1837 /** evict exports failed VBR */
1838 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1843 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1845 struct ptlrpc_request *req = NULL;
1847 CDEBUG(D_HA, "Waiting for lock\n");
1848 if (target_recovery_overseer(obd, check_for_next_lock,
1849 exp_lock_replay_healthy))
1850 abort_lock_replay_queue(obd);
1852 cfs_spin_lock(&obd->obd_recovery_task_lock);
1853 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1854 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1855 struct ptlrpc_request, rq_list);
1856 cfs_list_del_init(&req->rq_list);
1857 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1859 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1860 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1861 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1862 /** evict exports failed VBR */
1863 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1868 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1870 struct ptlrpc_request *req = NULL;
1872 cfs_spin_lock(&obd->obd_recovery_task_lock);
1873 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1874 req = cfs_list_entry(obd->obd_final_req_queue.next,
1875 struct ptlrpc_request, rq_list);
1876 cfs_list_del_init(&req->rq_list);
1877 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1878 if (req->rq_export->exp_in_recovery) {
1879 cfs_spin_lock(&req->rq_export->exp_lock);
1880 req->rq_export->exp_in_recovery = 0;
1881 cfs_spin_unlock(&req->rq_export->exp_lock);
1884 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1889 static int handle_recovery_req(struct ptlrpc_thread *thread,
1890 struct ptlrpc_request *req,
1891 svc_handler_t handler)
1897 * export can be evicted during recovery, no need to handle replays for
1898 * it after that, discard such request silently
1900 if (req->rq_export->exp_disconnected)
1901 GOTO(reqcopy_put, rc = 0);
1903 rc = lu_context_init(&req->rq_recov_session, LCT_SESSION);
1905 CERROR("Failure to initialize session: %d\n", rc);
1906 GOTO(reqcopy_put, rc);
1909 req->rq_recov_session.lc_thread = thread;
1910 lu_context_enter(&req->rq_recov_session);
1911 req->rq_svc_thread = thread;
1912 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1914 /* thread context */
1915 lu_context_enter(&thread->t_env->le_ctx);
1917 lu_context_exit(&thread->t_env->le_ctx);
1919 lu_context_exit(&req->rq_recov_session);
1920 lu_context_fini(&req->rq_recov_session);
1921 /* don't reset timer for final stage */
1922 if (!exp_finished(req->rq_export)) {
1923 int to = obd_timeout;
1926 * Add request timeout to the recovery time so next request from
1927 * this client may come in recovery time
1930 struct ptlrpc_service_part *svcpt;
1932 svcpt = req->rq_rqbd->rqbd_svcpt;
1933 /* If the server sent early reply for this request,
1934 * the client will recalculate the timeout according to
1935 * current server estimate service time, so we will
1936 * use the maxium timeout here for waiting the client
1937 * sending the next req */
1938 to = max((int)at_est2timeout(
1939 at_get(&svcpt->scp_at_estimate)),
1940 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1941 /* Add net_latency (see ptlrpc_replay_req) */
1942 to += lustre_msg_get_service_time(req->rq_reqmsg);
1944 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1950 static int target_recovery_thread(void *arg)
1952 struct lu_target *lut = arg;
1953 struct obd_device *obd = lut->lut_obd;
1954 struct ptlrpc_request *req;
1955 struct target_recovery_data *trd = &obd->obd_recovery_data;
1956 unsigned long delta;
1957 unsigned long flags;
1959 struct ptlrpc_thread *thread = NULL;
1963 cfs_daemonize_ctxt("tgt_recov");
1965 SIGNAL_MASK_LOCK(current, flags);
1966 sigfillset(¤t->blocked);
1968 SIGNAL_MASK_UNLOCK(current, flags);
1970 OBD_ALLOC_PTR(thread);
1976 OBD_FREE_PTR(thread);
1980 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
1982 OBD_FREE_PTR(thread);
1987 thread->t_env = env;
1988 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1989 env->le_ctx.lc_thread = thread;
1990 thread->t_data = NULL;
1991 thread->t_watchdog = NULL;
1993 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
1995 trd->trd_processing_task = cfs_curproc_pid();
1997 cfs_spin_lock(&obd->obd_dev_lock);
1998 obd->obd_recovering = 1;
1999 cfs_spin_unlock(&obd->obd_dev_lock);
2000 cfs_complete(&trd->trd_starting);
2002 /* first of all, we have to know the first transno to replay */
2003 if (target_recovery_overseer(obd, check_for_clients,
2004 exp_connect_healthy)) {
2005 abort_req_replay_queue(obd);
2006 abort_lock_replay_queue(obd);
2009 /* next stage: replay requests */
2011 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
2012 cfs_atomic_read(&obd->obd_req_replay_clients),
2013 obd->obd_next_recovery_transno);
2014 while ((req = target_next_replay_req(obd))) {
2015 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
2016 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
2017 lustre_msg_get_transno(req->rq_reqmsg),
2018 libcfs_nid2str(req->rq_peer.nid));
2019 handle_recovery_req(thread, req,
2020 trd->trd_recovery_handler);
2022 * bz18031: increase next_recovery_transno before
2023 * target_request_copy_put() will drop exp_rpc reference
2025 cfs_spin_lock(&obd->obd_recovery_task_lock);
2026 obd->obd_next_recovery_transno++;
2027 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2028 target_exp_dequeue_req_replay(req);
2029 target_request_copy_put(req);
2030 obd->obd_replayed_requests++;
2034 * The second stage: replay locks
2036 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2037 cfs_atomic_read(&obd->obd_lock_replay_clients));
2038 while ((req = target_next_replay_lock(obd))) {
2039 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
2040 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2041 libcfs_nid2str(req->rq_peer.nid));
2042 handle_recovery_req(thread, req,
2043 trd->trd_recovery_handler);
2044 target_request_copy_put(req);
2045 obd->obd_replayed_locks++;
2049 * The third stage: reply on final pings, at this moment all clients
2050 * must have request in final queue
2052 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2053 /** Update server last boot epoch */
2054 lut_boot_epoch_update(lut);
2055 /* We drop recoverying flag to forward all new requests
2056 * to regular mds_handle() since now */
2057 cfs_spin_lock(&obd->obd_dev_lock);
2058 obd->obd_recovering = obd->obd_abort_recovery = 0;
2059 cfs_spin_unlock(&obd->obd_dev_lock);
2060 cfs_spin_lock(&obd->obd_recovery_task_lock);
2061 target_cancel_recovery_timer(obd);
2062 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2063 while ((req = target_next_final_ping(obd))) {
2064 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
2065 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2066 libcfs_nid2str(req->rq_peer.nid));
2067 handle_recovery_req(thread, req,
2068 trd->trd_recovery_handler);
2069 target_request_copy_put(req);
2072 delta = (jiffies - delta) / CFS_HZ;
2073 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2074 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2075 if (delta > OBD_RECOVERY_TIME_SOFT) {
2076 CWARN("too long recovery - read logs\n");
2077 libcfs_debug_dumplog();
2080 target_finish_recovery(obd);
2082 lu_context_fini(&env->le_ctx);
2083 trd->trd_processing_task = 0;
2084 cfs_complete(&trd->trd_finishing);
2086 OBD_FREE_PTR(thread);
2091 static int target_start_recovery_thread(struct lu_target *lut,
2092 svc_handler_t handler)
2094 struct obd_device *obd = lut->lut_obd;
2096 struct target_recovery_data *trd = &obd->obd_recovery_data;
2098 memset(trd, 0, sizeof(*trd));
2099 cfs_init_completion(&trd->trd_starting);
2100 cfs_init_completion(&trd->trd_finishing);
2101 trd->trd_recovery_handler = handler;
2103 if (cfs_create_thread(target_recovery_thread, lut, 0) > 0) {
2104 cfs_wait_for_completion(&trd->trd_starting);
2105 LASSERT(obd->obd_recovering != 0);
2112 void target_stop_recovery_thread(struct obd_device *obd)
2114 if (obd->obd_recovery_data.trd_processing_task > 0) {
2115 struct target_recovery_data *trd = &obd->obd_recovery_data;
2116 /** recovery can be done but postrecovery is not yet */
2117 cfs_spin_lock(&obd->obd_dev_lock);
2118 if (obd->obd_recovering) {
2119 CERROR("%s: Aborting recovery\n", obd->obd_name);
2120 obd->obd_abort_recovery = 1;
2121 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2123 cfs_spin_unlock(&obd->obd_dev_lock);
2124 cfs_wait_for_completion(&trd->trd_finishing);
2128 void target_recovery_fini(struct obd_device *obd)
2130 class_disconnect_exports(obd);
2131 target_stop_recovery_thread(obd);
2132 target_cleanup_recovery(obd);
2134 EXPORT_SYMBOL(target_recovery_fini);
2136 static void target_recovery_expired(unsigned long castmeharder)
2138 struct obd_device *obd = (struct obd_device *)castmeharder;
2139 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2140 " after %lds (%d clients connected)\n",
2141 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2142 cfs_time_current_sec()- obd->obd_recovery_start,
2143 cfs_atomic_read(&obd->obd_connected_clients));
2145 obd->obd_recovery_expired = 1;
2146 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2149 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2151 struct obd_device *obd = lut->lut_obd;
2152 if (obd->obd_max_recoverable_clients == 0) {
2153 /** Update server last boot epoch */
2154 lut_boot_epoch_update(lut);
2158 CWARN("RECOVERY: service %s, %d recoverable clients, "
2159 "last_transno "LPU64"\n", obd->obd_name,
2160 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2161 LASSERT(obd->obd_stopping == 0);
2162 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2163 obd->obd_recovery_start = 0;
2164 obd->obd_recovery_end = 0;
2166 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2167 target_start_recovery_thread(lut, handler);
2169 EXPORT_SYMBOL(target_recovery_init);
2171 #endif /* __KERNEL__ */
2173 static int target_process_req_flags(struct obd_device *obd,
2174 struct ptlrpc_request *req)
2176 struct obd_export *exp = req->rq_export;
2177 LASSERT(exp != NULL);
2178 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2179 /* client declares he's ready to replay locks */
2180 cfs_spin_lock(&exp->exp_lock);
2181 if (exp->exp_req_replay_needed) {
2182 exp->exp_req_replay_needed = 0;
2183 cfs_spin_unlock(&exp->exp_lock);
2185 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2186 cfs_atomic_dec(&obd->obd_req_replay_clients);
2188 cfs_spin_unlock(&exp->exp_lock);
2191 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2192 /* client declares he's ready to complete recovery
2193 * so, we put the request on th final queue */
2194 cfs_spin_lock(&exp->exp_lock);
2195 if (exp->exp_lock_replay_needed) {
2196 exp->exp_lock_replay_needed = 0;
2197 cfs_spin_unlock(&exp->exp_lock);
2199 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2200 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2202 cfs_spin_unlock(&exp->exp_lock);
2208 int target_queue_recovery_request(struct ptlrpc_request *req,
2209 struct obd_device *obd)
2213 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2216 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
2217 /* Processing the queue right now, don't re-add. */
2221 target_process_req_flags(obd, req);
2223 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2224 /* client declares he's ready to complete recovery
2225 * so, we put the request on th final queue */
2226 target_request_copy_get(req);
2227 DEBUG_REQ(D_HA, req, "queue final req");
2228 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2229 cfs_spin_lock(&obd->obd_recovery_task_lock);
2230 if (obd->obd_recovering) {
2231 cfs_list_add_tail(&req->rq_list,
2232 &obd->obd_final_req_queue);
2234 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2235 target_request_copy_put(req);
2236 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2238 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2241 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2242 /* client declares he's ready to replay locks */
2243 target_request_copy_get(req);
2244 DEBUG_REQ(D_HA, req, "queue lock replay req");
2245 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2246 cfs_spin_lock(&obd->obd_recovery_task_lock);
2247 LASSERT(obd->obd_recovering);
2248 /* usually due to recovery abort */
2249 if (!req->rq_export->exp_in_recovery) {
2250 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2251 target_request_copy_put(req);
2254 LASSERT(req->rq_export->exp_lock_replay_needed);
2255 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2256 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2260 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2261 * (i.e. buflens etc are in my own byte order), but type-dependent
2262 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2265 CFS_INIT_LIST_HEAD(&req->rq_list);
2266 DEBUG_REQ(D_HA, req, "not queueing");
2270 /* If we're processing the queue, we want don't want to queue this
2273 * Also, if this request has a transno less than the one we're waiting
2274 * for, we should process it now. It could (and currently always will)
2275 * be an open request for a descriptor that was opened some time ago.
2277 * Also, a resent, replayed request that has already been
2278 * handled will pass through here and be processed immediately.
2280 CDEBUG(D_HA, "Next recovery transno: "LPU64
2281 ", current: "LPU64", replaying\n",
2282 obd->obd_next_recovery_transno, transno);
2283 cfs_spin_lock(&obd->obd_recovery_task_lock);
2284 if (transno < obd->obd_next_recovery_transno) {
2285 /* Processing the queue right now, don't re-add. */
2286 LASSERT(cfs_list_empty(&req->rq_list));
2287 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2290 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2292 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2295 target_request_copy_get(req);
2296 if (!req->rq_export->exp_in_recovery) {
2297 target_request_copy_put(req);
2300 LASSERT(req->rq_export->exp_req_replay_needed);
2302 if (target_exp_enqueue_req_replay(req)) {
2303 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2304 target_request_copy_put(req);
2309 cfs_spin_lock(&obd->obd_recovery_task_lock);
2310 LASSERT(obd->obd_recovering);
2311 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2312 struct ptlrpc_request *reqiter =
2313 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2315 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2316 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2321 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2323 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2324 "has been claimed by another client");
2325 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2326 target_exp_dequeue_req_replay(req);
2327 target_request_copy_put(req);
2333 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2335 obd->obd_requests_queued_for_recovery++;
2336 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2337 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2341 int target_handle_ping(struct ptlrpc_request *req)
2343 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2344 return req_capsule_server_pack(&req->rq_pill);
2347 void target_committed_to_req(struct ptlrpc_request *req)
2349 struct obd_export *exp = req->rq_export;
2351 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2352 lustre_msg_set_last_committed(req->rq_repmsg,
2353 exp->exp_last_committed);
2355 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2356 "%d)", exp->exp_obd->obd_no_transno,
2357 req->rq_repmsg == NULL);
2359 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2360 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2362 EXPORT_SYMBOL(target_committed_to_req);
2364 #endif /* HAVE_SERVER_SUPPORT */
2367 * Packs current SLV and Limit into \a req.
2369 int target_pack_pool_reply(struct ptlrpc_request *req)
2371 struct obd_device *obd;
2375 * Check that we still have all structures alive as this may
2376 * be some late rpc in shutdown time.
2378 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2379 !exp_connect_lru_resize(req->rq_export))) {
2380 lustre_msg_set_slv(req->rq_repmsg, 0);
2381 lustre_msg_set_limit(req->rq_repmsg, 0);
2386 * OBD is alive here as export is alive, which we checked above.
2388 obd = req->rq_export->exp_obd;
2390 cfs_read_lock(&obd->obd_pool_lock);
2391 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2392 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2393 cfs_read_unlock(&obd->obd_pool_lock);
2398 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2400 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2401 DEBUG_REQ(D_ERROR, req, "dropping reply");
2406 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2407 req->rq_status = rc;
2408 return (ptlrpc_send_error(req, 1));
2410 DEBUG_REQ(D_NET, req, "sending reply");
2413 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2416 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2418 struct ptlrpc_service_part *svcpt;
2420 struct ptlrpc_reply_state *rs;
2421 struct obd_export *exp;
2424 if (req->rq_no_reply) {
2429 svcpt = req->rq_rqbd->rqbd_svcpt;
2430 rs = req->rq_reply_state;
2431 if (rs == NULL || !rs->rs_difficult) {
2433 target_send_reply_msg (req, rc, fail_id);
2438 /* must be an export if locks saved */
2439 LASSERT (req->rq_export != NULL);
2440 /* req/reply consistent */
2441 LASSERT(rs->rs_svcpt == svcpt);
2444 LASSERT (!rs->rs_scheduled);
2445 LASSERT (!rs->rs_scheduled_ever);
2446 LASSERT (!rs->rs_handled);
2447 LASSERT (!rs->rs_on_net);
2448 LASSERT (rs->rs_export == NULL);
2449 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2450 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2452 exp = class_export_get (req->rq_export);
2454 /* disable reply scheduling while I'm setting up */
2455 rs->rs_scheduled = 1;
2457 rs->rs_xid = req->rq_xid;
2458 rs->rs_transno = req->rq_transno;
2459 rs->rs_export = exp;
2460 rs->rs_opc = lustre_msg_get_opc(rs->rs_msg);
2462 cfs_spin_lock(&exp->exp_uncommitted_replies_lock);
2463 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2464 rs->rs_transno, exp->exp_last_committed);
2465 if (rs->rs_transno > exp->exp_last_committed) {
2466 /* not committed already */
2467 cfs_list_add_tail(&rs->rs_obd_list,
2468 &exp->exp_uncommitted_replies);
2470 cfs_spin_unlock (&exp->exp_uncommitted_replies_lock);
2472 cfs_spin_lock(&exp->exp_lock);
2473 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2474 cfs_spin_unlock(&exp->exp_lock);
2476 netrc = target_send_reply_msg (req, rc, fail_id);
2478 cfs_spin_lock(&svcpt->scp_rep_lock);
2480 cfs_atomic_inc(&svcpt->scp_nreps_difficult);
2483 /* error sending: reply is off the net. Also we need +1
2484 * reply ref until ptlrpc_handle_rs() is done
2485 * with the reply state (if the send was successful, there
2486 * would have been +1 ref for the net, which
2487 * reply_out_callback leaves alone) */
2489 ptlrpc_rs_addref(rs);
2492 cfs_spin_lock(&rs->rs_lock);
2493 if (rs->rs_transno <= exp->exp_last_committed ||
2494 (!rs->rs_on_net && !rs->rs_no_ack) ||
2495 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2496 cfs_list_empty(&rs->rs_obd_list)) {
2497 CDEBUG(D_HA, "Schedule reply immediately\n");
2498 ptlrpc_dispatch_difficult_reply(rs);
2500 cfs_list_add(&rs->rs_list, &svcpt->scp_rep_active);
2501 rs->rs_scheduled = 0; /* allow notifier to schedule */
2503 cfs_spin_unlock(&rs->rs_lock);
2504 cfs_spin_unlock(&svcpt->scp_rep_lock);
2508 ldlm_mode_t lck_compat_array[] = {
2509 [LCK_EX] LCK_COMPAT_EX,
2510 [LCK_PW] LCK_COMPAT_PW,
2511 [LCK_PR] LCK_COMPAT_PR,
2512 [LCK_CW] LCK_COMPAT_CW,
2513 [LCK_CR] LCK_COMPAT_CR,
2514 [LCK_NL] LCK_COMPAT_NL,
2515 [LCK_GROUP] LCK_COMPAT_GROUP,
2516 [LCK_COS] LCK_COMPAT_COS,
2520 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2521 * not escape to the user level.
2523 int ldlm_error2errno(ldlm_error_t error)
2531 case ELDLM_LOCK_CHANGED:
2534 case ELDLM_LOCK_ABORTED:
2537 case ELDLM_LOCK_REPLACED:
2540 case ELDLM_NO_LOCK_DATA:
2543 case ELDLM_NAMESPACE_EXISTS:
2546 case ELDLM_BAD_NAMESPACE:
2550 if (((int)error) < 0) /* cast to signed type */
2551 result = error; /* as ldlm_error_t can be unsigned */
2553 CERROR("Invalid DLM result code: %d\n", error);
2559 EXPORT_SYMBOL(ldlm_error2errno);
2562 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2564 ldlm_error_t ldlm_errno2error(int err_no)
2573 error = ELDLM_LOCK_CHANGED;
2576 error = ELDLM_LOCK_ABORTED;
2579 error = ELDLM_LOCK_REPLACED;
2582 error = ELDLM_NO_LOCK_DATA;
2585 error = ELDLM_NAMESPACE_EXISTS;
2588 error = ELDLM_BAD_NAMESPACE;
2595 EXPORT_SYMBOL(ldlm_errno2error);
2597 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2598 void ldlm_dump_export_locks(struct obd_export *exp)
2600 cfs_spin_lock(&exp->exp_locks_list_guard);
2601 if (!cfs_list_empty(&exp->exp_locks_list)) {
2602 struct ldlm_lock *lock;
2604 CERROR("dumping locks for export %p,"
2605 "ignore if the unmount doesn't hang\n", exp);
2606 cfs_list_for_each_entry(lock, &exp->exp_locks_list, l_exp_refs_link)
2607 LDLM_ERROR(lock, "lock:");
2609 cfs_spin_unlock(&exp->exp_locks_list_guard);
2613 #ifdef HAVE_SERVER_SUPPORT
2614 static int target_bulk_timeout(void *data)
2617 /* We don't fail the connection here, because having the export
2618 * killed makes the (vital) call to commitrw very sad.
2623 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2625 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2628 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2629 struct l_wait_info *lwi)
2631 struct ptlrpc_request *req = desc->bd_req;
2635 /* Check if there is eviction in progress, and if so, wait for
2637 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2638 *lwi = LWI_INTR(NULL, NULL);
2639 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2640 !cfs_atomic_read(&exp->exp_obd->
2641 obd_evict_inprogress),
2645 /* Check if client was evicted or tried to reconnect already */
2646 if (exp->exp_failed || exp->exp_abort_active_req) {
2649 if (desc->bd_type == BULK_PUT_SINK)
2650 rc = sptlrpc_svc_wrap_bulk(req, desc);
2652 rc = ptlrpc_start_bulk_transfer(desc);
2655 if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2656 ptlrpc_abort_bulk(desc);
2657 } else if (rc == 0) {
2658 time_t start = cfs_time_current_sec();
2660 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2661 cfs_duration_t timeout = timeoutl <= 0 ?
2662 CFS_TICK : cfs_time_seconds(timeoutl);
2663 *lwi = LWI_TIMEOUT_INTERVAL(timeout,
2664 cfs_time_seconds(1),
2665 target_bulk_timeout,
2667 rc = l_wait_event(desc->bd_waitq,
2668 !ptlrpc_server_bulk_active(desc) ||
2670 exp->exp_abort_active_req,
2672 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2673 /* Wait again if we changed deadline */
2674 } while ((rc == -ETIMEDOUT) &&
2675 (req->rq_deadline > cfs_time_current_sec()));
2677 if (rc == -ETIMEDOUT) {
2678 DEBUG_REQ(D_ERROR, req,
2679 "timeout on bulk %s after %ld%+lds",
2681 req->rq_deadline - start,
2682 cfs_time_current_sec() -
2684 ptlrpc_abort_bulk(desc);
2685 } else if (exp->exp_failed) {
2686 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2689 ptlrpc_abort_bulk(desc);
2690 } else if (exp->exp_abort_active_req) {
2691 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2693 /* we don't reply anyway */
2695 ptlrpc_abort_bulk(desc);
2696 } else if (!desc->bd_success ||
2697 desc->bd_nob_transferred != desc->bd_nob) {
2698 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2700 "truncated" : "network error on",
2702 desc->bd_nob_transferred,
2704 /* XXX should this be a different errno? */
2706 } else if (desc->bd_type == BULK_GET_SINK) {
2707 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2710 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2711 bulk2type(desc), rc);
2716 EXPORT_SYMBOL(target_bulk_io);
2718 #endif /* HAVE_SERVER_SUPPORT */