4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2010, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * This file deals with various client/target related logic including recovery.
40 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
44 #define DEBUG_SUBSYSTEM S_LDLM
47 # include <libcfs/libcfs.h>
49 # include <liblustre.h>
52 #include <obd_class.h>
53 #include <lustre_dlm.h>
54 #include <lustre_net.h>
55 #include <lustre_sec.h>
56 #include "ldlm_internal.h"
58 /* @priority: If non-zero, move the selected connection to the list head.
59 * @create: If zero, only search in existing connections.
61 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
62 int priority, int create)
64 struct ptlrpc_connection *ptlrpc_conn;
65 struct obd_import_conn *imp_conn = NULL, *item;
69 if (!create && !priority) {
70 CDEBUG(D_HA, "Nothing to do\n");
74 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
76 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
81 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
83 GOTO(out_put, rc = -ENOMEM);
87 spin_lock(&imp->imp_lock);
88 cfs_list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
89 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
91 cfs_list_del(&item->oic_item);
92 cfs_list_add(&item->oic_item,
94 item->oic_last_attempt = 0;
96 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
97 imp, imp->imp_obd->obd_name, uuid->uuid,
98 (priority ? ", moved to head" : ""));
99 spin_unlock(&imp->imp_lock);
100 GOTO(out_free, rc = 0);
103 /* No existing import connection found for \a uuid. */
105 imp_conn->oic_conn = ptlrpc_conn;
106 imp_conn->oic_uuid = *uuid;
107 imp_conn->oic_last_attempt = 0;
109 cfs_list_add(&imp_conn->oic_item, &imp->imp_conn_list);
111 cfs_list_add_tail(&imp_conn->oic_item,
112 &imp->imp_conn_list);
113 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
114 imp, imp->imp_obd->obd_name, uuid->uuid,
115 (priority ? "head" : "tail"));
117 spin_unlock(&imp->imp_lock);
118 GOTO(out_free, rc = -ENOENT);
121 spin_unlock(&imp->imp_lock);
125 OBD_FREE(imp_conn, sizeof(*imp_conn));
127 ptlrpc_connection_put(ptlrpc_conn);
131 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
133 return import_set_conn(imp, uuid, 1, 0);
136 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
139 return import_set_conn(imp, uuid, priority, 1);
141 EXPORT_SYMBOL(client_import_add_conn);
143 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
145 struct obd_import_conn *imp_conn;
146 struct obd_export *dlmexp;
150 spin_lock(&imp->imp_lock);
151 if (cfs_list_empty(&imp->imp_conn_list)) {
152 LASSERT(!imp->imp_connection);
156 cfs_list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
157 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
159 LASSERT(imp_conn->oic_conn);
161 if (imp_conn == imp->imp_conn_current) {
162 LASSERT(imp_conn->oic_conn == imp->imp_connection);
164 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
165 imp->imp_state != LUSTRE_IMP_DISCON) {
166 CERROR("can't remove current connection\n");
167 GOTO(out, rc = -EBUSY);
170 ptlrpc_connection_put(imp->imp_connection);
171 imp->imp_connection = NULL;
173 dlmexp = class_conn2export(&imp->imp_dlm_handle);
174 if (dlmexp && dlmexp->exp_connection) {
175 LASSERT(dlmexp->exp_connection ==
177 ptlrpc_connection_put(dlmexp->exp_connection);
178 dlmexp->exp_connection = NULL;
182 cfs_list_del(&imp_conn->oic_item);
183 ptlrpc_connection_put(imp_conn->oic_conn);
184 OBD_FREE(imp_conn, sizeof(*imp_conn));
185 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
186 imp, imp->imp_obd->obd_name, uuid->uuid);
191 spin_unlock(&imp->imp_lock);
193 CERROR("connection %s not found\n", uuid->uuid);
196 EXPORT_SYMBOL(client_import_del_conn);
199 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
200 * to find a conn uuid of \a imp which can reach \a peer.
202 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
203 struct obd_uuid *uuid)
205 struct obd_import_conn *conn;
209 spin_lock(&imp->imp_lock);
210 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
211 /* Check if conn UUID does have this peer NID. */
212 if (class_check_uuid(&conn->oic_uuid, peer)) {
213 *uuid = conn->oic_uuid;
218 spin_unlock(&imp->imp_lock);
221 EXPORT_SYMBOL(client_import_find_conn);
223 void client_destroy_import(struct obd_import *imp)
225 /* Drop security policy instance after all RPCs have finished/aborted
226 * to let all busy contexts be released. */
227 class_import_get(imp);
228 class_destroy_import(imp);
229 sptlrpc_import_sec_put(imp);
230 class_import_put(imp);
232 EXPORT_SYMBOL(client_destroy_import);
235 * Check whether or not the OSC is on MDT.
238 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
240 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
243 static int osc_on_mdt(char *obdname)
247 ptr = strrchr(obdname, '-');
251 if (strncmp(ptr + 1, "MDT", 3) == 0)
257 /* Configure an RPC client OBD device.
262 * 3 - inactive-on-startup
264 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
266 struct client_obd *cli = &obddev->u.cli;
267 struct obd_import *imp;
268 struct obd_uuid server_uuid;
269 int rq_portal, rp_portal, connect_op;
270 char *name = obddev->obd_type->typ_name;
271 ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
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 rq_portal = OST_REQUEST_PORTAL;
279 rp_portal = OSC_REPLY_PORTAL;
280 connect_op = OST_CONNECT;
281 cli->cl_sp_me = LUSTRE_SP_CLI;
282 cli->cl_sp_to = LUSTRE_SP_OST;
283 ns_type = LDLM_NS_TYPE_OSC;
284 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
285 !strcmp(name, LUSTRE_LWP_NAME)) {
286 rq_portal = MDS_REQUEST_PORTAL;
287 rp_portal = MDC_REPLY_PORTAL;
288 connect_op = MDS_CONNECT;
289 cli->cl_sp_me = LUSTRE_SP_CLI;
290 cli->cl_sp_to = LUSTRE_SP_MDT;
291 ns_type = LDLM_NS_TYPE_MDC;
292 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
293 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
294 /* OSP_on_MDT for other MDTs */
295 connect_op = MDS_CONNECT;
296 cli->cl_sp_to = LUSTRE_SP_MDT;
297 ns_type = LDLM_NS_TYPE_MDC;
298 rq_portal = OUT_PORTAL;
300 /* OSP on MDT for OST */
301 connect_op = OST_CONNECT;
302 cli->cl_sp_to = LUSTRE_SP_OST;
303 ns_type = LDLM_NS_TYPE_OSC;
304 rq_portal = OST_REQUEST_PORTAL;
306 rp_portal = OSC_REPLY_PORTAL;
307 cli->cl_sp_me = LUSTRE_SP_CLI;
308 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
309 rq_portal = MGS_REQUEST_PORTAL;
310 rp_portal = MGC_REPLY_PORTAL;
311 connect_op = MGS_CONNECT;
312 cli->cl_sp_me = LUSTRE_SP_MGC;
313 cli->cl_sp_to = LUSTRE_SP_MGS;
314 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
315 ns_type = LDLM_NS_TYPE_MGC;
317 CERROR("unknown client OBD type \"%s\", can't setup\n",
322 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
323 CERROR("requires a TARGET UUID\n");
327 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
328 CERROR("client UUID must be less than 38 characters\n");
332 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
333 CERROR("setup requires a SERVER UUID\n");
337 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
338 CERROR("target UUID must be less than 38 characters\n");
342 init_rwsem(&cli->cl_sem);
343 sema_init(&cli->cl_mgc_sem, 1);
344 cli->cl_conn_count = 0;
345 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
346 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
347 sizeof(server_uuid)));
350 cli->cl_avail_grant = 0;
351 /* FIXME: Should limit this for the sum of all cl_dirty_max. */
352 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
353 if (cli->cl_dirty_max >> PAGE_CACHE_SHIFT > totalram_pages / 8)
354 cli->cl_dirty_max = totalram_pages << (PAGE_CACHE_SHIFT - 3);
355 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
356 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
357 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
358 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
359 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
360 client_obd_list_lock_init(&cli->cl_loi_list_lock);
361 cfs_atomic_set(&cli->cl_pending_w_pages, 0);
362 cfs_atomic_set(&cli->cl_pending_r_pages, 0);
363 cli->cl_r_in_flight = 0;
364 cli->cl_w_in_flight = 0;
366 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
367 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
368 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
369 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
370 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
371 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
374 CFS_INIT_LIST_HEAD(&cli->cl_lru_osc);
375 cfs_atomic_set(&cli->cl_lru_shrinkers, 0);
376 cfs_atomic_set(&cli->cl_lru_busy, 0);
377 cfs_atomic_set(&cli->cl_lru_in_list, 0);
378 CFS_INIT_LIST_HEAD(&cli->cl_lru_list);
379 client_obd_list_lock_init(&cli->cl_lru_list_lock);
380 cfs_atomic_set(&cli->cl_unstable_count, 0);
382 init_waitqueue_head(&cli->cl_destroy_waitq);
383 cfs_atomic_set(&cli->cl_destroy_in_flight, 0);
384 #ifdef ENABLE_CHECKSUM
385 /* Turn on checksumming by default. */
386 cli->cl_checksum = 1;
388 * The supported checksum types will be worked out at connect time
389 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
392 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
394 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
396 /* This value may be reduced at connect time in
397 * ptlrpc_connect_interpret() . We initialize it to only
398 * 1MB until we know what the performance looks like.
399 * In the future this should likely be increased. LU-1431 */
400 cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
401 LNET_MTU >> PAGE_CACHE_SHIFT);
403 if (!strcmp(name, LUSTRE_MDC_NAME)) {
404 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
405 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) {
406 cli->cl_max_rpcs_in_flight = 2;
407 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) {
408 cli->cl_max_rpcs_in_flight = 3;
409 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
410 cli->cl_max_rpcs_in_flight = 4;
412 if (osc_on_mdt(obddev->obd_name))
413 cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT;
415 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
419 CERROR("ldlm_get_ref failed: %d\n", rc);
423 ptlrpc_init_client(rq_portal, rp_portal, name,
424 &obddev->obd_ldlm_client);
426 imp = class_new_import(obddev);
428 GOTO(err_ldlm, rc = -ENOENT);
429 imp->imp_client = &obddev->obd_ldlm_client;
430 imp->imp_connect_op = connect_op;
431 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
432 LUSTRE_CFG_BUFLEN(lcfg, 1));
433 class_import_put(imp);
435 rc = client_import_add_conn(imp, &server_uuid, 1);
437 CERROR("can't add initial connection\n");
438 GOTO(err_import, rc);
441 cli->cl_import = imp;
442 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
443 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
444 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
446 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
447 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
448 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
449 name, obddev->obd_name,
450 cli->cl_target_uuid.uuid);
451 spin_lock(&imp->imp_lock);
452 imp->imp_deactive = 1;
453 spin_unlock(&imp->imp_lock);
457 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
458 LDLM_NAMESPACE_CLIENT,
459 LDLM_NAMESPACE_GREEDY,
461 if (obddev->obd_namespace == NULL) {
462 CERROR("Unable to create client namespace - %s\n",
464 GOTO(err_import, rc = -ENOMEM);
467 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
472 class_destroy_import(imp);
479 EXPORT_SYMBOL(client_obd_setup);
481 int client_obd_cleanup(struct obd_device *obddev)
485 ldlm_namespace_free_post(obddev->obd_namespace);
486 obddev->obd_namespace = NULL;
488 obd_cleanup_client_import(obddev);
489 LASSERT(obddev->u.cli.cl_import == NULL);
494 EXPORT_SYMBOL(client_obd_cleanup);
496 /* ->o_connect() method for client side (OSC and MDC and MGC) */
497 int client_connect_import(const struct lu_env *env,
498 struct obd_export **exp,
499 struct obd_device *obd, struct obd_uuid *cluuid,
500 struct obd_connect_data *data, void *localdata)
502 struct client_obd *cli = &obd->u.cli;
503 struct obd_import *imp = cli->cl_import;
504 struct obd_connect_data *ocd;
505 struct lustre_handle conn = { 0 };
510 down_write(&cli->cl_sem);
511 if (cli->cl_conn_count > 0 )
512 GOTO(out_sem, rc = -EALREADY);
514 rc = class_connect(&conn, obd, cluuid);
518 cli->cl_conn_count++;
519 *exp = class_conn2export(&conn);
521 LASSERT(obd->obd_namespace);
523 imp->imp_dlm_handle = conn;
524 rc = ptlrpc_init_import(imp);
528 ocd = &imp->imp_connect_data;
531 imp->imp_connect_flags_orig = data->ocd_connect_flags;
534 rc = ptlrpc_connect_import(imp);
536 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
539 LASSERT((*exp)->exp_connection);
542 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
543 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
544 data->ocd_connect_flags, ocd->ocd_connect_flags);
545 data->ocd_connect_flags = ocd->ocd_connect_flags;
548 ptlrpc_pinger_add_import(imp);
554 cli->cl_conn_count--;
555 class_disconnect(*exp);
559 up_write(&cli->cl_sem);
563 EXPORT_SYMBOL(client_connect_import);
565 int client_disconnect_export(struct obd_export *exp)
567 struct obd_device *obd = class_exp2obd(exp);
568 struct client_obd *cli;
569 struct obd_import *imp;
574 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
575 exp, exp ? exp->exp_handle.h_cookie : -1);
580 imp = cli->cl_import;
582 down_write(&cli->cl_sem);
583 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
586 if (!cli->cl_conn_count) {
587 CERROR("disconnecting disconnected device (%s)\n",
589 GOTO(out_disconnect, rc = -EINVAL);
592 cli->cl_conn_count--;
593 if (cli->cl_conn_count)
594 GOTO(out_disconnect, rc = 0);
596 /* Mark import deactivated now, so we don't try to reconnect if any
597 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
598 * fully deactivate the import, or that would drop all requests. */
599 spin_lock(&imp->imp_lock);
600 imp->imp_deactive = 1;
601 spin_unlock(&imp->imp_lock);
603 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
604 * delete it regardless. (It's safe to delete an import that was
606 (void)ptlrpc_pinger_del_import(imp);
608 if (obd->obd_namespace != NULL) {
609 /* obd_force == local only */
610 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
611 obd->obd_force ? LCF_LOCAL : 0, NULL);
612 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
615 /* There's no need to hold sem while disconnecting an import,
616 * and it may actually cause deadlock in GSS. */
617 up_write(&cli->cl_sem);
618 rc = ptlrpc_disconnect_import(imp, 0);
619 down_write(&cli->cl_sem);
621 ptlrpc_invalidate_import(imp);
626 /* Use server style - class_disconnect should be always called for
628 err = class_disconnect(exp);
632 up_write(&cli->cl_sem);
636 EXPORT_SYMBOL(client_disconnect_export);
638 #ifdef HAVE_SERVER_SUPPORT
639 int server_disconnect_export(struct obd_export *exp)
644 /* Disconnect early so that clients can't keep using export. */
645 rc = class_disconnect(exp);
646 /* Close import to avoid sending any requests. */
647 if (exp->exp_imp_reverse)
648 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
650 if (exp->exp_obd->obd_namespace != NULL)
651 ldlm_cancel_locks_for_export(exp);
653 /* complete all outstanding replies */
654 spin_lock(&exp->exp_lock);
655 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
656 struct ptlrpc_reply_state *rs =
657 cfs_list_entry(exp->exp_outstanding_replies.next,
658 struct ptlrpc_reply_state, rs_exp_list);
659 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
661 spin_lock(&svcpt->scp_rep_lock);
663 cfs_list_del_init(&rs->rs_exp_list);
664 spin_lock(&rs->rs_lock);
665 ptlrpc_schedule_difficult_reply(rs);
666 spin_unlock(&rs->rs_lock);
668 spin_unlock(&svcpt->scp_rep_lock);
670 spin_unlock(&exp->exp_lock);
674 EXPORT_SYMBOL(server_disconnect_export);
676 /* --------------------------------------------------------------------------
677 * from old lib/target.c
678 * -------------------------------------------------------------------------- */
680 static int target_handle_reconnect(struct lustre_handle *conn,
681 struct obd_export *exp,
682 struct obd_uuid *cluuid)
686 if (exp->exp_connection && exp->exp_imp_reverse) {
687 struct lustre_handle *hdl;
688 struct obd_device *target;
690 hdl = &exp->exp_imp_reverse->imp_remote_handle;
691 target = exp->exp_obd;
693 /* Might be a re-connect after a partition. */
694 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
695 if (target->obd_recovering) {
696 int timeout = cfs_duration_sec(cfs_time_sub(
698 &target->obd_recovery_timer),
699 cfs_time_current()));
701 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
702 "ing, waiting for %d clients in recov"
703 "ery for %d:%.02d\n", target->obd_name,
704 obd_uuid2str(&exp->exp_client_uuid),
705 obd_export_nid2str(exp),
706 target->obd_max_recoverable_clients,
707 timeout / 60, timeout % 60);
709 LCONSOLE_WARN("%s: Client %s (at %s) "
710 "reconnecting\n", target->obd_name,
711 obd_uuid2str(&exp->exp_client_uuid),
712 obd_export_nid2str(exp));
715 conn->cookie = exp->exp_handle.h_cookie;
716 /* target_handle_connect() treats EALREADY and
717 * -EALREADY differently. EALREADY means we are
718 * doing a valid reconnect from the same client. */
721 LCONSOLE_WARN("%s: already connected client %s (at %s) "
722 "with handle "LPX64". Rejecting client "
723 "with the same UUID trying to reconnect "
724 "with handle "LPX64"\n", target->obd_name,
725 obd_uuid2str(&exp->exp_client_uuid),
726 obd_export_nid2str(exp),
727 hdl->cookie, conn->cookie);
728 memset(conn, 0, sizeof *conn);
729 /* target_handle_connect() treats EALREADY and
730 * -EALREADY differently. -EALREADY is an error
731 * (same UUID, different handle). */
736 conn->cookie = exp->exp_handle.h_cookie;
737 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
738 cluuid->uuid, exp, conn->cookie);
742 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
745 struct obd_export *exp = cb_data;
747 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
748 obd->obd_name, exp->exp_client_uuid.uuid);
750 spin_lock(&exp->exp_lock);
751 exp->exp_need_sync = 0;
752 spin_unlock(&exp->exp_lock);
753 class_export_cb_put(exp);
755 EXPORT_SYMBOL(target_client_add_cb);
759 check_and_start_recovery_timer(struct obd_device *obd,
760 struct ptlrpc_request *req, int new_client);
763 check_and_start_recovery_timer(struct obd_device *obd,
764 struct ptlrpc_request *req, int new_client)
769 int target_handle_connect(struct ptlrpc_request *req)
771 struct obd_device *target = NULL, *targref = NULL;
772 struct obd_export *export = NULL;
773 struct obd_import *revimp;
774 struct obd_import *tmp_imp = NULL;
775 struct lustre_handle conn;
776 struct lustre_handle *tmp;
777 struct obd_uuid tgtuuid;
778 struct obd_uuid cluuid;
779 struct obd_uuid remote_uuid;
784 bool mds_conn = false, lw_client = false;
785 struct obd_connect_data *data, *tmpdata;
787 lnet_nid_t *client_nid = NULL;
790 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
792 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
794 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
795 GOTO(out, rc = -EINVAL);
798 obd_str2uuid(&tgtuuid, str);
799 target = class_uuid2obd(&tgtuuid);
801 target = class_name2obd(str);
804 deuuidify(str, NULL, &target_start, &target_len);
805 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
806 "from %s (no target). If you are running "
807 "an HA pair check that the target is "
808 "mounted on the other server.\n", str,
809 libcfs_nid2str(req->rq_peer.nid));
810 GOTO(out, rc = -ENODEV);
813 spin_lock(&target->obd_dev_lock);
814 if (target->obd_stopping || !target->obd_set_up) {
815 spin_unlock(&target->obd_dev_lock);
817 deuuidify(str, NULL, &target_start, &target_len);
818 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
819 target_len, target_start,
820 libcfs_nid2str(req->rq_peer.nid),
821 (target->obd_stopping ?
822 "stopping" : "not set up"));
823 GOTO(out, rc = -ENODEV);
826 if (target->obd_no_conn) {
827 spin_unlock(&target->obd_dev_lock);
829 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
830 "from %s\n", target->obd_name,
831 libcfs_nid2str(req->rq_peer.nid));
832 GOTO(out, rc = -EAGAIN);
835 /* Make sure the target isn't cleaned up while we're here. Yes,
836 * there's still a race between the above check and our incref here.
837 * Really, class_uuid2obd should take the ref. */
838 targref = class_incref(target, __FUNCTION__, current);
840 target->obd_conn_inprogress++;
841 spin_unlock(&target->obd_dev_lock);
843 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
845 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
846 GOTO(out, rc = -EINVAL);
849 obd_str2uuid(&cluuid, str);
851 /* XXX Extract a nettype and format accordingly. */
852 switch (sizeof(lnet_nid_t)) {
853 /* NB the casts only avoid compiler warnings. */
855 snprintf(remote_uuid.uuid, sizeof remote_uuid,
856 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
859 snprintf(remote_uuid.uuid, sizeof remote_uuid,
860 "NET_%x_UUID", (__u32)req->rq_peer.nid);
866 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
868 GOTO(out, rc = -EPROTO);
872 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
874 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
876 GOTO(out, rc = -EPROTO);
878 rc = req_capsule_server_pack(&req->rq_pill);
882 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
883 if (data->ocd_version < LUSTRE_VERSION_CODE -
884 LUSTRE_VERSION_ALLOWED_OFFSET ||
885 data->ocd_version > LUSTRE_VERSION_CODE +
886 LUSTRE_VERSION_ALLOWED_OFFSET) {
887 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
888 "libclient connection attempt",
889 data->ocd_version < LUSTRE_VERSION_CODE ?
891 OBD_OCD_VERSION_MAJOR(data->ocd_version),
892 OBD_OCD_VERSION_MINOR(data->ocd_version),
893 OBD_OCD_VERSION_PATCH(data->ocd_version),
894 OBD_OCD_VERSION_FIX(data->ocd_version));
895 data = req_capsule_server_sized_get(&req->rq_pill,
897 offsetof(typeof(*data), ocd_version) +
898 sizeof(data->ocd_version));
900 data->ocd_connect_flags = OBD_CONNECT_VERSION;
901 data->ocd_version = LUSTRE_VERSION_CODE;
903 GOTO(out, rc = -EPROTO);
907 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
908 (data->ocd_connect_flags & OBD_CONNECT_MDS))
911 if ((data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0)
914 /* lctl gets a backstage, all-access pass. */
915 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
916 goto dont_check_exports;
918 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
922 /* We've found an export in the hash. */
924 spin_lock(&export->exp_lock);
926 if (export->exp_connecting) { /* bug 9635, et. al. */
927 spin_unlock(&export->exp_lock);
928 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
929 export->exp_obd->obd_name, export,
930 libcfs_nid2str(req->rq_peer.nid));
931 class_export_put(export);
934 } else if (mds_conn && export->exp_connection) {
935 spin_unlock(&export->exp_lock);
936 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
937 /* MDS reconnected after failover. */
938 LCONSOLE_WARN("%s: Received MDS connection from "
939 "%s, removing former export from %s\n",
940 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
941 libcfs_nid2str(export->exp_connection->c_peer.nid));
943 /* New MDS connection from the same NID. */
944 LCONSOLE_WARN("%s: Received new MDS connection from "
945 "%s, removing former export from same NID\n",
946 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
947 class_fail_export(export);
948 class_export_put(export);
951 } else if (export->exp_connection != NULL &&
952 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
953 (lustre_msg_get_op_flags(req->rq_reqmsg) &
954 MSG_CONNECT_INITIAL)) {
955 spin_unlock(&export->exp_lock);
956 /* In MDS failover we have static UUID but NID can change. */
957 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
958 "existing nid %s is already connected\n",
959 target->obd_name, cluuid.uuid,
960 libcfs_nid2str(req->rq_peer.nid),
962 export->exp_connection->c_peer.nid));
964 class_export_put(export);
967 export->exp_connecting = 1;
968 spin_unlock(&export->exp_lock);
969 LASSERT(export->exp_obd == target);
971 rc = target_handle_reconnect(&conn, export, &cluuid);
974 /* If we found an export, we already unlocked. */
977 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
978 } else if (req->rq_export == NULL &&
979 cfs_atomic_read(&export->exp_rpc_count) > 0) {
980 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
981 "still busy with %d references\n",
982 target->obd_name, cluuid.uuid,
983 libcfs_nid2str(req->rq_peer.nid),
984 cfs_atomic_read(&export->exp_refcount));
985 GOTO(out, rc = -EBUSY);
986 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
987 if (!strstr(cluuid.uuid, "mdt"))
988 LCONSOLE_WARN("%s: Rejecting reconnect from the "
989 "known client %s (at %s) because it "
990 "is indicating it is a new client",
991 target->obd_name, cluuid.uuid,
992 libcfs_nid2str(req->rq_peer.nid));
993 GOTO(out, rc = -EALREADY);
995 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1002 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
1003 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1004 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1005 export, (long)cfs_time_current_sec(),
1006 export ? (long)export->exp_last_request_time : 0);
1008 /* If this is the first time a client connects, reset the recovery
1009 * timer. Discard lightweight connections which might be local. */
1010 if (!lw_client && rc == 0 && target->obd_recovering)
1011 check_and_start_recovery_timer(target, req, export == NULL);
1013 /* We want to handle EALREADY but *not* -EALREADY from
1014 * target_handle_reconnect(), return reconnection state in a flag. */
1015 if (rc == EALREADY) {
1016 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1022 /* Tell the client if we support replayable requests. */
1023 if (target->obd_replayable)
1024 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1025 client_nid = &req->rq_peer.nid;
1027 if (export == NULL) {
1028 /* allow lightweight connections during recovery */
1029 if (target->obd_recovering && !lw_client) {
1031 int c; /* connected */
1032 int i; /* in progress */
1034 int s; /* stale/evicted */
1036 c = cfs_atomic_read(&target->obd_connected_clients);
1037 i = cfs_atomic_read(&target->obd_lock_replay_clients);
1038 k = target->obd_max_recoverable_clients;
1039 s = target->obd_stale_clients;
1040 t = cfs_timer_deadline(&target->obd_recovery_timer);
1041 t = cfs_time_sub(t, cfs_time_current());
1042 t = cfs_duration_sec(t);
1043 LCONSOLE_WARN("%s: Denying connection for new client "
1044 "%s (at %s), waiting for all %d known "
1045 "clients (%d recovered, %d in progress, "
1046 "and %d evicted) to recover in %d:%.02d\n",
1047 target->obd_name, cluuid.uuid,
1048 libcfs_nid2str(req->rq_peer.nid), k,
1049 c - i, i, s, (int)t / 60,
1054 rc = obd_connect(req->rq_svc_thread->t_env,
1055 &export, target, &cluuid, data,
1057 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1058 lustre_msg_add_op_flags(req->rq_repmsg,
1059 MSG_CONNECT_RECOVERING);
1061 conn.cookie = export->exp_handle.h_cookie;
1064 rc = obd_reconnect(req->rq_svc_thread->t_env,
1065 export, target, &cluuid, data, client_nid);
1070 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 6, 50, 0)
1071 /* 2.2.0 clients always swab nidtbl entries due to a bug, so server
1072 * will do the swabbing for if the client is using the same endianness.
1074 * This fixup is version-limited, because we don't want to carry the
1075 * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we need
1076 * interop with unpatched 2.2 clients. For newer clients, servers
1077 * will never do MNE swabbing, let the client handle that. LU-1644 */
1078 export->exp_need_mne_swab = !ptlrpc_req_need_swab(req) &&
1079 !(data->ocd_connect_flags & OBD_CONNECT_MNE_SWAB);
1081 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and exp_need_mne_swab"
1084 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1085 data->ocd_instance = target->u.obt.obt_instance;
1087 /* Return only the parts of obd_connect_data that we understand, so the
1088 * client knows that we don't understand the rest. */
1090 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1092 tmpdata = req_capsule_server_get(&req->rq_pill,
1094 /* Don't use struct assignment here, because the client reply
1095 * buffer may be smaller/larger than the local struct
1096 * obd_connect_data. */
1097 memcpy(tmpdata, data, min(tmpsize, size));
1100 /* If all else goes well, this is our RPC return code. */
1103 lustre_msg_set_handle(req->rq_repmsg, &conn);
1105 /* If the client and the server are the same node, we will already
1106 * have an export that really points to the client's DLM export,
1107 * because we have a shared handles table.
1109 * XXX this will go away when shaver stops sending the "connect" handle
1110 * in the real "remote handle" field of the request --phik 24 Apr 2003
1112 ptlrpc_request_change_export(req, export);
1114 spin_lock(&export->exp_lock);
1115 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1116 spin_unlock(&export->exp_lock);
1117 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1118 "or equal conn_cnt: %d >= %d\n",
1119 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1120 export->exp_conn_cnt,
1121 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1123 GOTO(out, rc = -EALREADY);
1125 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1126 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1128 /* Don't evict liblustre clients for not pinging. */
1129 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1130 export->exp_libclient = 1;
1131 spin_unlock(&export->exp_lock);
1133 spin_lock(&target->obd_dev_lock);
1134 cfs_list_del_init(&export->exp_obd_chain_timed);
1135 spin_unlock(&target->obd_dev_lock);
1137 spin_unlock(&export->exp_lock);
1140 if (export->exp_connection != NULL) {
1141 /* Check to see if connection came from another NID. */
1142 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1143 !cfs_hlist_unhashed(&export->exp_nid_hash))
1144 cfs_hash_del(export->exp_obd->obd_nid_hash,
1145 &export->exp_connection->c_peer.nid,
1146 &export->exp_nid_hash);
1148 ptlrpc_connection_put(export->exp_connection);
1151 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1154 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1155 cfs_hash_add(export->exp_obd->obd_nid_hash,
1156 &export->exp_connection->c_peer.nid,
1157 &export->exp_nid_hash);
1160 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1162 __u64 transno = data->ocd_transno;
1164 spin_lock(&export->exp_lock);
1165 /* possible race with class_disconnect_stale_exports,
1166 * export may be already in the eviction process */
1167 if (export->exp_failed) {
1168 spin_unlock(&export->exp_lock);
1169 GOTO(out, rc = -ENODEV);
1171 export->exp_in_recovery = 1;
1172 export->exp_req_replay_needed = 1;
1173 export->exp_lock_replay_needed = 1;
1174 spin_unlock(&export->exp_lock);
1176 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1177 MSG_CONNECT_TRANSNO);
1178 if (has_transno && transno == 0)
1179 CWARN("Connect with zero transno!\n");
1181 if (has_transno && transno > 0 &&
1182 transno < target->obd_next_recovery_transno &&
1183 transno > target->obd_last_committed) {
1184 /* Another way is to use cmpxchg() to be lock-free. */
1185 spin_lock(&target->obd_recovery_task_lock);
1186 if (transno < target->obd_next_recovery_transno)
1187 target->obd_next_recovery_transno = transno;
1188 spin_unlock(&target->obd_recovery_task_lock);
1191 cfs_atomic_inc(&target->obd_req_replay_clients);
1192 cfs_atomic_inc(&target->obd_lock_replay_clients);
1193 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1194 target->obd_max_recoverable_clients)
1195 wake_up(&target->obd_next_transno_waitq);
1198 /* Tell the client we're in recovery, when client is involved in it. */
1199 if (target->obd_recovering && !lw_client)
1200 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1202 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1205 /* Return -ENOTCONN in case of errors to let client reconnect. */
1206 revimp = class_new_import(target);
1207 if (revimp == NULL) {
1208 CERROR("fail to alloc new reverse import.\n");
1209 GOTO(out, rc = -ENOTCONN);
1212 spin_lock(&export->exp_lock);
1213 if (export->exp_imp_reverse != NULL)
1214 /* destroyed import can be still referenced in ctxt */
1215 tmp_imp = export->exp_imp_reverse;
1216 export->exp_imp_reverse = revimp;
1217 spin_unlock(&export->exp_lock);
1219 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1220 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1221 revimp->imp_remote_handle = conn;
1222 revimp->imp_dlm_fake = 1;
1223 revimp->imp_state = LUSTRE_IMP_FULL;
1225 /* Unknown versions will be caught in
1226 * ptlrpc_handle_server_req_in->lustre_unpack_msg(). */
1227 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1229 if ((data->ocd_connect_flags & OBD_CONNECT_AT) &&
1230 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1231 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1233 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1235 if ((data->ocd_connect_flags & OBD_CONNECT_FULL20) &&
1236 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1237 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1239 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1241 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1243 CERROR("Failed to get sec for reverse import: %d\n", rc);
1244 spin_lock(&export->exp_lock);
1245 export->exp_imp_reverse = NULL;
1246 spin_unlock(&export->exp_lock);
1247 class_destroy_import(revimp);
1250 class_import_put(revimp);
1253 if (tmp_imp != NULL)
1254 client_destroy_import(tmp_imp);
1256 spin_lock(&export->exp_lock);
1257 export->exp_connecting = 0;
1258 spin_unlock(&export->exp_lock);
1260 class_export_put(export);
1263 spin_lock(&target->obd_dev_lock);
1264 target->obd_conn_inprogress--;
1265 spin_unlock(&target->obd_dev_lock);
1267 class_decref(targref, __func__, current);
1270 req->rq_status = rc;
1273 EXPORT_SYMBOL(target_handle_connect);
1275 int target_handle_disconnect(struct ptlrpc_request *req)
1280 rc = req_capsule_server_pack(&req->rq_pill);
1284 /* Keep the rq_export around so we can send the reply. */
1285 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1289 EXPORT_SYMBOL(target_handle_disconnect);
1291 void target_destroy_export(struct obd_export *exp)
1293 struct obd_import *imp = NULL;
1294 /* exports created from last_rcvd data, and "fake"
1295 exports created by lctl don't have an import */
1296 spin_lock(&exp->exp_lock);
1297 if (exp->exp_imp_reverse != NULL) {
1298 imp = exp->exp_imp_reverse;
1299 exp->exp_imp_reverse = NULL;
1301 spin_unlock(&exp->exp_lock);
1303 client_destroy_import(imp);
1305 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1306 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1307 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1308 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1310 EXPORT_SYMBOL(target_destroy_export);
1313 * Recovery functions
1315 static void target_request_copy_get(struct ptlrpc_request *req)
1317 class_export_rpc_inc(req->rq_export);
1318 LASSERT(cfs_list_empty(&req->rq_list));
1319 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1321 /* Increase refcount to keep request in queue. */
1322 cfs_atomic_inc(&req->rq_refcount);
1323 /* Let export know it has replays to be handled. */
1324 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1327 static void target_request_copy_put(struct ptlrpc_request *req)
1329 LASSERT(cfs_list_empty(&req->rq_replay_list));
1330 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1332 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1333 class_export_rpc_dec(req->rq_export);
1334 ptlrpc_server_drop_request(req);
1337 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1339 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1340 struct obd_export *exp = req->rq_export;
1341 struct ptlrpc_request *reqiter;
1346 spin_lock(&exp->exp_lock);
1347 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1349 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1356 /* We expect it with RESENT and REPLAY flags. */
1357 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1358 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1359 CERROR("invalid flags %x of resent replay\n",
1360 lustre_msg_get_flags(req->rq_reqmsg));
1362 cfs_list_add_tail(&req->rq_replay_list,
1363 &exp->exp_req_replay_queue);
1366 spin_unlock(&exp->exp_lock);
1370 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1372 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1373 LASSERT(req->rq_export);
1375 spin_lock(&req->rq_export->exp_lock);
1376 cfs_list_del_init(&req->rq_replay_list);
1377 spin_unlock(&req->rq_export->exp_lock);
1381 static void target_finish_recovery(struct obd_device *obd)
1385 /* Only log a recovery message when recovery has occurred. */
1386 if (obd->obd_recovery_start) {
1387 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1388 obd->obd_recovery_start);
1389 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1390 "%d recovered and %d %s evicted.\n", obd->obd_name,
1391 (int)elapsed_time / 60, (int)elapsed_time % 60,
1392 obd->obd_max_recoverable_clients,
1393 cfs_atomic_read(&obd->obd_connected_clients),
1394 obd->obd_stale_clients,
1395 obd->obd_stale_clients == 1 ? "was" : "were");
1398 ldlm_reprocess_all_ns(obd->obd_namespace);
1399 spin_lock(&obd->obd_recovery_task_lock);
1400 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1401 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1402 !cfs_list_empty(&obd->obd_final_req_queue)) {
1403 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1405 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1406 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1408 cfs_list_empty(&obd->obd_final_req_queue) ? \
1410 spin_unlock(&obd->obd_recovery_task_lock);
1413 spin_unlock(&obd->obd_recovery_task_lock);
1415 obd->obd_recovery_end = cfs_time_current_sec();
1417 /* When recovery finished, cleanup orphans on MDS and OST. */
1418 if (OBT(obd) && OBP(obd, postrecov)) {
1419 int rc = OBP(obd, postrecov)(obd);
1421 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1427 static void abort_req_replay_queue(struct obd_device *obd)
1429 struct ptlrpc_request *req, *n;
1430 cfs_list_t abort_list;
1432 CFS_INIT_LIST_HEAD(&abort_list);
1433 spin_lock(&obd->obd_recovery_task_lock);
1434 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1435 spin_unlock(&obd->obd_recovery_task_lock);
1436 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1437 DEBUG_REQ(D_WARNING, req, "aborted:");
1438 req->rq_status = -ENOTCONN;
1439 if (ptlrpc_error(req)) {
1440 DEBUG_REQ(D_ERROR, req,
1441 "failed abort_req_reply; skipping");
1443 target_exp_dequeue_req_replay(req);
1444 target_request_copy_put(req);
1448 static void abort_lock_replay_queue(struct obd_device *obd)
1450 struct ptlrpc_request *req, *n;
1451 cfs_list_t abort_list;
1453 CFS_INIT_LIST_HEAD(&abort_list);
1454 spin_lock(&obd->obd_recovery_task_lock);
1455 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1456 spin_unlock(&obd->obd_recovery_task_lock);
1457 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1458 DEBUG_REQ(D_ERROR, req, "aborted:");
1459 req->rq_status = -ENOTCONN;
1460 if (ptlrpc_error(req)) {
1461 DEBUG_REQ(D_ERROR, req,
1462 "failed abort_lock_reply; skipping");
1464 target_request_copy_put(req);
1468 /* Called from a cleanup function if the device is being cleaned up
1469 forcefully. The exports should all have been disconnected already,
1470 the only thing left to do is
1471 - clear the recovery flags
1473 - free queued requests and replies, but don't send replies
1474 Because the obd_stopping flag is set, no new requests should be received.
1477 void target_cleanup_recovery(struct obd_device *obd)
1479 struct ptlrpc_request *req, *n;
1480 cfs_list_t clean_list;
1483 CFS_INIT_LIST_HEAD(&clean_list);
1484 spin_lock(&obd->obd_dev_lock);
1485 if (!obd->obd_recovering) {
1486 spin_unlock(&obd->obd_dev_lock);
1490 obd->obd_recovering = obd->obd_abort_recovery = 0;
1491 spin_unlock(&obd->obd_dev_lock);
1493 spin_lock(&obd->obd_recovery_task_lock);
1494 target_cancel_recovery_timer(obd);
1495 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1496 spin_unlock(&obd->obd_recovery_task_lock);
1498 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1499 LASSERT(req->rq_reply_state == 0);
1500 target_exp_dequeue_req_replay(req);
1501 target_request_copy_put(req);
1504 spin_lock(&obd->obd_recovery_task_lock);
1505 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1506 cfs_list_splice_init(&obd->obd_final_req_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_request_copy_put(req);
1516 EXPORT_SYMBOL(target_cleanup_recovery);
1518 /* obd_recovery_task_lock should be held */
1519 void target_cancel_recovery_timer(struct obd_device *obd)
1521 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1522 cfs_timer_disarm(&obd->obd_recovery_timer);
1524 EXPORT_SYMBOL(target_cancel_recovery_timer);
1526 static void target_start_recovery_timer(struct obd_device *obd)
1528 if (obd->obd_recovery_start != 0)
1531 spin_lock(&obd->obd_dev_lock);
1532 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1533 spin_unlock(&obd->obd_dev_lock);
1537 LASSERT(obd->obd_recovery_timeout != 0);
1539 if (obd->obd_recovery_start != 0) {
1540 spin_unlock(&obd->obd_dev_lock);
1544 cfs_timer_arm(&obd->obd_recovery_timer,
1545 cfs_time_shift(obd->obd_recovery_timeout));
1546 obd->obd_recovery_start = cfs_time_current_sec();
1547 spin_unlock(&obd->obd_dev_lock);
1549 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1550 "or until %d client%s reconnect%s\n",
1552 obd->obd_recovery_timeout / 60,
1553 obd->obd_recovery_timeout % 60,
1554 obd->obd_max_recoverable_clients,
1555 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1556 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1560 * extend recovery window.
1562 * if @extend is true, extend recovery window to have @drt remaining at least;
1563 * otherwise, make sure the recovery timeout value is not less than @drt.
1565 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1569 cfs_duration_t left;
1572 spin_lock(&obd->obd_dev_lock);
1573 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1574 spin_unlock(&obd->obd_dev_lock);
1577 LASSERT(obd->obd_recovery_start != 0);
1579 now = cfs_time_current_sec();
1580 to = obd->obd_recovery_timeout;
1581 end = obd->obd_recovery_start + to;
1582 left = cfs_time_sub(end, now);
1584 if (extend && (drt > left)) {
1586 } else if (!extend && (drt > to)) {
1588 /* reduce drt by already passed time */
1589 drt -= obd->obd_recovery_timeout - left;
1592 if (to > obd->obd_recovery_time_hard)
1593 to = obd->obd_recovery_time_hard;
1594 if (obd->obd_recovery_timeout < to ||
1595 obd->obd_recovery_timeout == obd->obd_recovery_time_hard) {
1596 obd->obd_recovery_timeout = to;
1597 cfs_timer_arm(&obd->obd_recovery_timer,
1598 cfs_time_shift(drt));
1600 spin_unlock(&obd->obd_dev_lock);
1602 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1603 obd->obd_name, (unsigned)drt);
1606 /* Reset the timer with each new client connection */
1608 * This timer is actually reconnect_timer, which is for making sure
1609 * the total recovery window is at least as big as my reconnect
1610 * attempt timing. So the initial recovery time_out will be set to
1611 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1612 * from client is bigger than this, then the recovery time_out will
1613 * be extended to make sure the client could be reconnected, in the
1614 * process, the timeout from the new client should be ignored.
1618 check_and_start_recovery_timer(struct obd_device *obd,
1619 struct ptlrpc_request *req,
1622 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1623 struct obd_device_target *obt = &obd->u.obt;
1625 if (!new_client && service_time)
1626 /* Teach server about old server's estimates, as first guess
1627 * at how long new requests will take. */
1628 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1631 target_start_recovery_timer(obd);
1633 /* Convert the service time to RPC timeout,
1634 * and reuse service_time to limit stack usage. */
1635 service_time = at_est2timeout(service_time);
1637 /* We expect other clients to timeout within service_time, then try
1638 * to reconnect, then try the failover server. The max delay between
1639 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1640 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1642 LASSERT(obt->obt_magic == OBT_MAGIC);
1643 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1644 if (service_time > obd->obd_recovery_timeout && !new_client)
1645 extend_recovery_timer(obd, service_time, false);
1648 /** Health checking routines */
1649 static inline int exp_connect_healthy(struct obd_export *exp)
1651 return (exp->exp_in_recovery);
1654 /** if export done req_replay or has replay in queue */
1655 static inline int exp_req_replay_healthy(struct obd_export *exp)
1657 return (!exp->exp_req_replay_needed ||
1658 cfs_atomic_read(&exp->exp_replay_count) > 0);
1660 /** if export done lock_replay or has replay in queue */
1661 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1663 return (!exp->exp_lock_replay_needed ||
1664 cfs_atomic_read(&exp->exp_replay_count) > 0);
1667 static inline int exp_vbr_healthy(struct obd_export *exp)
1669 return (!exp->exp_vbr_failed);
1672 static inline int exp_finished(struct obd_export *exp)
1674 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1677 /** Checking routines for recovery */
1678 static int check_for_clients(struct obd_device *obd)
1680 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1682 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1684 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1685 return (clnts + obd->obd_stale_clients ==
1686 obd->obd_max_recoverable_clients);
1689 static int check_for_next_transno(struct obd_device *obd)
1691 struct ptlrpc_request *req = NULL;
1692 int wake_up = 0, connected, completed, queue_len;
1693 __u64 next_transno, req_transno;
1696 spin_lock(&obd->obd_recovery_task_lock);
1697 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1698 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1699 struct ptlrpc_request, rq_list);
1700 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1705 connected = cfs_atomic_read(&obd->obd_connected_clients);
1706 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1707 queue_len = obd->obd_requests_queued_for_recovery;
1708 next_transno = obd->obd_next_recovery_transno;
1710 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1711 "req_transno: "LPU64", next_transno: "LPU64"\n",
1712 obd->obd_max_recoverable_clients, connected, completed,
1713 queue_len, req_transno, next_transno);
1715 if (obd->obd_abort_recovery) {
1716 CDEBUG(D_HA, "waking for aborted recovery\n");
1718 } else if (obd->obd_recovery_expired) {
1719 CDEBUG(D_HA, "waking for expired recovery\n");
1721 } else if (req_transno == next_transno) {
1722 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1724 } else if (queue_len > 0 &&
1725 queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1727 /** handle gaps occured due to lost reply or VBR */
1728 LASSERTF(req_transno >= next_transno,
1729 "req_transno: "LPU64", next_transno: "LPU64"\n",
1730 req_transno, next_transno);
1731 if (req_transno > obd->obd_last_committed &&
1732 !obd->obd_version_recov)
1735 "%s: waking for gap in transno, VBR is %s (skip: "
1736 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1737 ", last_committed: "LPD64")\n",
1738 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1739 next_transno, queue_len, completed, connected,
1740 req_transno, obd->obd_last_committed);
1741 obd->obd_next_recovery_transno = req_transno;
1743 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1744 CDEBUG(D_HA, "waking for completed recovery\n");
1746 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1747 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1748 " by fail_lock, waking up ("LPD64")\n", next_transno);
1749 obd->obd_next_recovery_transno = req_transno;
1752 spin_unlock(&obd->obd_recovery_task_lock);
1756 static int check_for_next_lock(struct obd_device *obd)
1760 spin_lock(&obd->obd_recovery_task_lock);
1761 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1762 CDEBUG(D_HA, "waking for next lock\n");
1764 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1765 CDEBUG(D_HA, "waking for completed lock replay\n");
1767 } else if (obd->obd_abort_recovery) {
1768 CDEBUG(D_HA, "waking for aborted recovery\n");
1770 } else if (obd->obd_recovery_expired) {
1771 CDEBUG(D_HA, "waking for expired recovery\n");
1774 spin_unlock(&obd->obd_recovery_task_lock);
1780 * wait for recovery events,
1781 * check its status with help of check_routine
1782 * evict dead clients via health_check
1784 static int target_recovery_overseer(struct obd_device *obd,
1785 int (*check_routine)(struct obd_device *),
1786 int (*health_check)(struct obd_export *))
1789 wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1790 if (obd->obd_abort_recovery) {
1791 CWARN("recovery is aborted, evict exports in recovery\n");
1792 /** evict exports which didn't finish recovery yet */
1793 class_disconnect_stale_exports(obd, exp_finished);
1795 } else if (obd->obd_recovery_expired) {
1796 obd->obd_recovery_expired = 0;
1797 /** If some clients died being recovered, evict them */
1798 LCONSOLE_WARN("%s: recovery is timed out, "
1799 "evict stale exports\n", obd->obd_name);
1800 /** evict cexports with no replay in queue, they are stalled */
1801 class_disconnect_stale_exports(obd, health_check);
1802 /** continue with VBR */
1803 spin_lock(&obd->obd_dev_lock);
1804 obd->obd_version_recov = 1;
1805 spin_unlock(&obd->obd_dev_lock);
1807 * reset timer, recovery will proceed with versions now,
1808 * timeout is set just to handle reconnection delays
1810 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1811 /** Wait for recovery events again, after evicting bad clients */
1817 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1819 struct ptlrpc_request *req = NULL;
1822 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1823 obd->obd_next_recovery_transno);
1825 if (target_recovery_overseer(obd, check_for_next_transno,
1826 exp_req_replay_healthy)) {
1827 abort_req_replay_queue(obd);
1828 abort_lock_replay_queue(obd);
1831 spin_lock(&obd->obd_recovery_task_lock);
1832 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1833 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1834 struct ptlrpc_request, rq_list);
1835 cfs_list_del_init(&req->rq_list);
1836 obd->obd_requests_queued_for_recovery--;
1837 spin_unlock(&obd->obd_recovery_task_lock);
1839 spin_unlock(&obd->obd_recovery_task_lock);
1840 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1841 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1842 /** evict exports failed VBR */
1843 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1848 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1850 struct ptlrpc_request *req = NULL;
1852 CDEBUG(D_HA, "Waiting for lock\n");
1853 if (target_recovery_overseer(obd, check_for_next_lock,
1854 exp_lock_replay_healthy))
1855 abort_lock_replay_queue(obd);
1857 spin_lock(&obd->obd_recovery_task_lock);
1858 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1859 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1860 struct ptlrpc_request, rq_list);
1861 cfs_list_del_init(&req->rq_list);
1862 spin_unlock(&obd->obd_recovery_task_lock);
1864 spin_unlock(&obd->obd_recovery_task_lock);
1865 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1866 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1867 /** evict exports failed VBR */
1868 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1873 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1875 struct ptlrpc_request *req = NULL;
1877 spin_lock(&obd->obd_recovery_task_lock);
1878 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1879 req = cfs_list_entry(obd->obd_final_req_queue.next,
1880 struct ptlrpc_request, rq_list);
1881 cfs_list_del_init(&req->rq_list);
1882 spin_unlock(&obd->obd_recovery_task_lock);
1883 if (req->rq_export->exp_in_recovery) {
1884 spin_lock(&req->rq_export->exp_lock);
1885 req->rq_export->exp_in_recovery = 0;
1886 spin_unlock(&req->rq_export->exp_lock);
1889 spin_unlock(&obd->obd_recovery_task_lock);
1894 static int handle_recovery_req(struct ptlrpc_thread *thread,
1895 struct ptlrpc_request *req,
1896 svc_handler_t handler)
1902 * export can be evicted during recovery, no need to handle replays for
1903 * it after that, discard such request silently
1905 if (req->rq_export->exp_disconnected)
1906 GOTO(reqcopy_put, rc = 0);
1908 rc = lu_context_init(&req->rq_recov_session, LCT_SERVER_SESSION);
1910 CERROR("Failure to initialize session: %d\n", rc);
1911 GOTO(reqcopy_put, rc);
1914 req->rq_recov_session.lc_thread = thread;
1915 lu_context_enter(&req->rq_recov_session);
1916 req->rq_svc_thread = thread;
1917 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1919 /* thread context */
1920 lu_context_enter(&thread->t_env->le_ctx);
1922 lu_context_exit(&thread->t_env->le_ctx);
1924 lu_context_exit(&req->rq_recov_session);
1925 lu_context_fini(&req->rq_recov_session);
1926 /* don't reset timer for final stage */
1927 if (!exp_finished(req->rq_export)) {
1928 int to = obd_timeout;
1931 * Add request timeout to the recovery time so next request from
1932 * this client may come in recovery time
1935 struct ptlrpc_service_part *svcpt;
1937 svcpt = req->rq_rqbd->rqbd_svcpt;
1938 /* If the server sent early reply for this request,
1939 * the client will recalculate the timeout according to
1940 * current server estimate service time, so we will
1941 * use the maxium timeout here for waiting the client
1942 * sending the next req */
1943 to = max((int)at_est2timeout(
1944 at_get(&svcpt->scp_at_estimate)),
1945 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1946 /* Add 2 net_latency, one for balance rq_deadline
1947 * (see ptl_send_rpc), one for resend the req to server,
1948 * Note: client will pack net_latency in replay req
1949 * (see ptlrpc_replay_req) */
1950 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
1952 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1958 static int target_recovery_thread(void *arg)
1960 struct lu_target *lut = arg;
1961 struct obd_device *obd = lut->lut_obd;
1962 struct ptlrpc_request *req;
1963 struct target_recovery_data *trd = &obd->obd_recovery_data;
1964 unsigned long delta;
1966 struct ptlrpc_thread *thread = NULL;
1970 unshare_fs_struct();
1971 OBD_ALLOC_PTR(thread);
1977 OBD_FREE_PTR(thread);
1981 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
1983 OBD_FREE_PTR(thread);
1988 thread->t_env = env;
1989 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1990 env->le_ctx.lc_thread = thread;
1991 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
1992 thread->t_watchdog = NULL;
1994 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
1996 trd->trd_processing_task = current_pid();
1998 spin_lock(&obd->obd_dev_lock);
1999 obd->obd_recovering = 1;
2000 spin_unlock(&obd->obd_dev_lock);
2001 complete(&trd->trd_starting);
2003 /* first of all, we have to know the first transno to replay */
2004 if (target_recovery_overseer(obd, check_for_clients,
2005 exp_connect_healthy)) {
2006 abort_req_replay_queue(obd);
2007 abort_lock_replay_queue(obd);
2010 /* next stage: replay requests */
2012 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
2013 cfs_atomic_read(&obd->obd_req_replay_clients),
2014 obd->obd_next_recovery_transno);
2015 while ((req = target_next_replay_req(obd))) {
2016 LASSERT(trd->trd_processing_task == current_pid());
2017 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
2018 lustre_msg_get_transno(req->rq_reqmsg),
2019 libcfs_nid2str(req->rq_peer.nid));
2020 handle_recovery_req(thread, req,
2021 trd->trd_recovery_handler);
2023 * bz18031: increase next_recovery_transno before
2024 * target_request_copy_put() will drop exp_rpc reference
2026 spin_lock(&obd->obd_recovery_task_lock);
2027 obd->obd_next_recovery_transno++;
2028 spin_unlock(&obd->obd_recovery_task_lock);
2029 target_exp_dequeue_req_replay(req);
2030 target_request_copy_put(req);
2031 obd->obd_replayed_requests++;
2035 * The second stage: replay locks
2037 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2038 cfs_atomic_read(&obd->obd_lock_replay_clients));
2039 while ((req = target_next_replay_lock(obd))) {
2040 LASSERT(trd->trd_processing_task == current_pid());
2041 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2042 libcfs_nid2str(req->rq_peer.nid));
2043 handle_recovery_req(thread, req,
2044 trd->trd_recovery_handler);
2045 target_request_copy_put(req);
2046 obd->obd_replayed_locks++;
2050 * The third stage: reply on final pings, at this moment all clients
2051 * must have request in final queue
2053 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2054 /** Update server last boot epoch */
2055 tgt_boot_epoch_update(lut);
2056 /* We drop recoverying flag to forward all new requests
2057 * to regular mds_handle() since now */
2058 spin_lock(&obd->obd_dev_lock);
2059 obd->obd_recovering = obd->obd_abort_recovery = 0;
2060 spin_unlock(&obd->obd_dev_lock);
2061 spin_lock(&obd->obd_recovery_task_lock);
2062 target_cancel_recovery_timer(obd);
2063 spin_unlock(&obd->obd_recovery_task_lock);
2064 while ((req = target_next_final_ping(obd))) {
2065 LASSERT(trd->trd_processing_task == current_pid());
2066 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2067 libcfs_nid2str(req->rq_peer.nid));
2068 handle_recovery_req(thread, req,
2069 trd->trd_recovery_handler);
2070 target_request_copy_put(req);
2073 delta = (jiffies - delta) / HZ;
2074 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2075 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2076 if (delta > OBD_RECOVERY_TIME_SOFT) {
2077 CWARN("too long recovery - read logs\n");
2078 libcfs_debug_dumplog();
2081 target_finish_recovery(obd);
2083 lu_context_fini(&env->le_ctx);
2084 trd->trd_processing_task = 0;
2085 complete(&trd->trd_finishing);
2087 tgt_io_thread_done(thread);
2088 OBD_FREE_PTR(thread);
2093 static int target_start_recovery_thread(struct lu_target *lut,
2094 svc_handler_t handler)
2096 struct obd_device *obd = lut->lut_obd;
2098 struct target_recovery_data *trd = &obd->obd_recovery_data;
2100 memset(trd, 0, sizeof(*trd));
2101 init_completion(&trd->trd_starting);
2102 init_completion(&trd->trd_finishing);
2103 trd->trd_recovery_handler = handler;
2105 if (!IS_ERR(kthread_run(target_recovery_thread,
2106 lut, "tgt_recov"))) {
2107 wait_for_completion(&trd->trd_starting);
2108 LASSERT(obd->obd_recovering != 0);
2116 void target_stop_recovery_thread(struct obd_device *obd)
2118 if (obd->obd_recovery_data.trd_processing_task > 0) {
2119 struct target_recovery_data *trd = &obd->obd_recovery_data;
2120 /** recovery can be done but postrecovery is not yet */
2121 spin_lock(&obd->obd_dev_lock);
2122 if (obd->obd_recovering) {
2123 CERROR("%s: Aborting recovery\n", obd->obd_name);
2124 obd->obd_abort_recovery = 1;
2125 wake_up(&obd->obd_next_transno_waitq);
2127 spin_unlock(&obd->obd_dev_lock);
2128 wait_for_completion(&trd->trd_finishing);
2131 EXPORT_SYMBOL(target_stop_recovery_thread);
2133 void target_recovery_fini(struct obd_device *obd)
2135 class_disconnect_exports(obd);
2136 target_stop_recovery_thread(obd);
2137 target_cleanup_recovery(obd);
2139 EXPORT_SYMBOL(target_recovery_fini);
2141 static void target_recovery_expired(unsigned long castmeharder)
2143 struct obd_device *obd = (struct obd_device *)castmeharder;
2144 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2145 " after %lds (%d clients connected)\n",
2146 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2147 cfs_time_current_sec()- obd->obd_recovery_start,
2148 cfs_atomic_read(&obd->obd_connected_clients));
2150 obd->obd_recovery_expired = 1;
2151 wake_up(&obd->obd_next_transno_waitq);
2154 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2156 struct obd_device *obd = lut->lut_obd;
2157 if (obd->obd_max_recoverable_clients == 0) {
2158 /** Update server last boot epoch */
2159 tgt_boot_epoch_update(lut);
2163 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2164 "last_transno "LPU64"\n", obd->obd_name,
2165 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2166 LASSERT(obd->obd_stopping == 0);
2167 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2168 obd->obd_recovery_start = 0;
2169 obd->obd_recovery_end = 0;
2171 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2172 target_start_recovery_thread(lut, handler);
2174 EXPORT_SYMBOL(target_recovery_init);
2176 #endif /* __KERNEL__ */
2178 static int target_process_req_flags(struct obd_device *obd,
2179 struct ptlrpc_request *req)
2181 struct obd_export *exp = req->rq_export;
2182 LASSERT(exp != NULL);
2183 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2184 /* client declares he's ready to replay locks */
2185 spin_lock(&exp->exp_lock);
2186 if (exp->exp_req_replay_needed) {
2187 exp->exp_req_replay_needed = 0;
2188 spin_unlock(&exp->exp_lock);
2190 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2191 cfs_atomic_dec(&obd->obd_req_replay_clients);
2193 spin_unlock(&exp->exp_lock);
2196 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2197 /* client declares he's ready to complete recovery
2198 * so, we put the request on th final queue */
2199 spin_lock(&exp->exp_lock);
2200 if (exp->exp_lock_replay_needed) {
2201 exp->exp_lock_replay_needed = 0;
2202 spin_unlock(&exp->exp_lock);
2204 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2205 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2207 spin_unlock(&exp->exp_lock);
2213 int target_queue_recovery_request(struct ptlrpc_request *req,
2214 struct obd_device *obd)
2218 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2221 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2222 /* Processing the queue right now, don't re-add. */
2226 target_process_req_flags(obd, req);
2228 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2229 /* client declares he's ready to complete recovery
2230 * so, we put the request on th final queue */
2231 target_request_copy_get(req);
2232 DEBUG_REQ(D_HA, req, "queue final req");
2233 wake_up(&obd->obd_next_transno_waitq);
2234 spin_lock(&obd->obd_recovery_task_lock);
2235 if (obd->obd_recovering) {
2236 cfs_list_add_tail(&req->rq_list,
2237 &obd->obd_final_req_queue);
2239 spin_unlock(&obd->obd_recovery_task_lock);
2240 target_request_copy_put(req);
2241 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2243 spin_unlock(&obd->obd_recovery_task_lock);
2246 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2247 /* client declares he's ready to replay locks */
2248 target_request_copy_get(req);
2249 DEBUG_REQ(D_HA, req, "queue lock replay req");
2250 wake_up(&obd->obd_next_transno_waitq);
2251 spin_lock(&obd->obd_recovery_task_lock);
2252 LASSERT(obd->obd_recovering);
2253 /* usually due to recovery abort */
2254 if (!req->rq_export->exp_in_recovery) {
2255 spin_unlock(&obd->obd_recovery_task_lock);
2256 target_request_copy_put(req);
2259 LASSERT(req->rq_export->exp_lock_replay_needed);
2260 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2261 spin_unlock(&obd->obd_recovery_task_lock);
2265 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2266 * (i.e. buflens etc are in my own byte order), but type-dependent
2267 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2270 CFS_INIT_LIST_HEAD(&req->rq_list);
2271 DEBUG_REQ(D_HA, req, "not queueing");
2275 /* If we're processing the queue, we want don't want to queue this
2278 * Also, if this request has a transno less than the one we're waiting
2279 * for, we should process it now. It could (and currently always will)
2280 * be an open request for a descriptor that was opened some time ago.
2282 * Also, a resent, replayed request that has already been
2283 * handled will pass through here and be processed immediately.
2285 CDEBUG(D_HA, "Next recovery transno: "LPU64
2286 ", current: "LPU64", replaying\n",
2287 obd->obd_next_recovery_transno, transno);
2288 spin_lock(&obd->obd_recovery_task_lock);
2289 if (transno < obd->obd_next_recovery_transno) {
2290 /* Processing the queue right now, don't re-add. */
2291 LASSERT(cfs_list_empty(&req->rq_list));
2292 spin_unlock(&obd->obd_recovery_task_lock);
2295 spin_unlock(&obd->obd_recovery_task_lock);
2297 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2300 target_request_copy_get(req);
2301 if (!req->rq_export->exp_in_recovery) {
2302 target_request_copy_put(req);
2305 LASSERT(req->rq_export->exp_req_replay_needed);
2307 if (target_exp_enqueue_req_replay(req)) {
2308 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2309 target_request_copy_put(req);
2314 spin_lock(&obd->obd_recovery_task_lock);
2315 LASSERT(obd->obd_recovering);
2316 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2317 struct ptlrpc_request *reqiter =
2318 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2320 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2321 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2326 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2328 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2329 "has been claimed by another client");
2330 spin_unlock(&obd->obd_recovery_task_lock);
2331 target_exp_dequeue_req_replay(req);
2332 target_request_copy_put(req);
2338 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2340 obd->obd_requests_queued_for_recovery++;
2341 spin_unlock(&obd->obd_recovery_task_lock);
2342 wake_up(&obd->obd_next_transno_waitq);
2345 EXPORT_SYMBOL(target_queue_recovery_request);
2347 int target_handle_ping(struct ptlrpc_request *req)
2349 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2350 return req_capsule_server_pack(&req->rq_pill);
2352 EXPORT_SYMBOL(target_handle_ping);
2354 void target_committed_to_req(struct ptlrpc_request *req)
2356 struct obd_export *exp = req->rq_export;
2358 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2359 lustre_msg_set_last_committed(req->rq_repmsg,
2360 exp->exp_last_committed);
2362 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2363 "%d)", exp->exp_obd->obd_no_transno,
2364 req->rq_repmsg == NULL);
2366 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2367 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2369 EXPORT_SYMBOL(target_committed_to_req);
2371 #endif /* HAVE_SERVER_SUPPORT */
2374 * Packs current SLV and Limit into \a req.
2376 int target_pack_pool_reply(struct ptlrpc_request *req)
2378 struct obd_device *obd;
2381 /* Check that we still have all structures alive as this may
2382 * be some late RPC at shutdown time. */
2383 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2384 !exp_connect_lru_resize(req->rq_export))) {
2385 lustre_msg_set_slv(req->rq_repmsg, 0);
2386 lustre_msg_set_limit(req->rq_repmsg, 0);
2390 /* OBD is alive here as export is alive, which we checked above. */
2391 obd = req->rq_export->exp_obd;
2393 read_lock(&obd->obd_pool_lock);
2394 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2395 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2396 read_unlock(&obd->obd_pool_lock);
2400 EXPORT_SYMBOL(target_pack_pool_reply);
2402 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2404 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2405 DEBUG_REQ(D_ERROR, req, "dropping reply");
2410 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2411 req->rq_status = rc;
2412 return (ptlrpc_send_error(req, 1));
2414 DEBUG_REQ(D_NET, req, "sending reply");
2417 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2420 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2422 struct ptlrpc_service_part *svcpt;
2424 struct ptlrpc_reply_state *rs;
2425 struct obd_export *exp;
2428 if (req->rq_no_reply) {
2433 svcpt = req->rq_rqbd->rqbd_svcpt;
2434 rs = req->rq_reply_state;
2435 if (rs == NULL || !rs->rs_difficult) {
2437 target_send_reply_msg (req, rc, fail_id);
2442 /* must be an export if locks saved */
2443 LASSERT (req->rq_export != NULL);
2444 /* req/reply consistent */
2445 LASSERT(rs->rs_svcpt == svcpt);
2448 LASSERT (!rs->rs_scheduled);
2449 LASSERT (!rs->rs_scheduled_ever);
2450 LASSERT (!rs->rs_handled);
2451 LASSERT (!rs->rs_on_net);
2452 LASSERT (rs->rs_export == NULL);
2453 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2454 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2456 exp = class_export_get (req->rq_export);
2458 /* disable reply scheduling while I'm setting up */
2459 rs->rs_scheduled = 1;
2461 rs->rs_xid = req->rq_xid;
2462 rs->rs_transno = req->rq_transno;
2463 rs->rs_export = exp;
2464 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2466 spin_lock(&exp->exp_uncommitted_replies_lock);
2467 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2468 rs->rs_transno, exp->exp_last_committed);
2469 if (rs->rs_transno > exp->exp_last_committed) {
2470 /* not committed already */
2471 cfs_list_add_tail(&rs->rs_obd_list,
2472 &exp->exp_uncommitted_replies);
2474 spin_unlock(&exp->exp_uncommitted_replies_lock);
2476 spin_lock(&exp->exp_lock);
2477 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2478 spin_unlock(&exp->exp_lock);
2480 netrc = target_send_reply_msg(req, rc, fail_id);
2482 spin_lock(&svcpt->scp_rep_lock);
2484 cfs_atomic_inc(&svcpt->scp_nreps_difficult);
2487 /* error sending: reply is off the net. Also we need +1
2488 * reply ref until ptlrpc_handle_rs() is done
2489 * with the reply state (if the send was successful, there
2490 * would have been +1 ref for the net, which
2491 * reply_out_callback leaves alone) */
2493 ptlrpc_rs_addref(rs);
2496 spin_lock(&rs->rs_lock);
2497 if (rs->rs_transno <= exp->exp_last_committed ||
2498 (!rs->rs_on_net && !rs->rs_no_ack) ||
2499 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2500 cfs_list_empty(&rs->rs_obd_list)) {
2501 CDEBUG(D_HA, "Schedule reply immediately\n");
2502 ptlrpc_dispatch_difficult_reply(rs);
2504 cfs_list_add(&rs->rs_list, &svcpt->scp_rep_active);
2505 rs->rs_scheduled = 0; /* allow notifier to schedule */
2507 spin_unlock(&rs->rs_lock);
2508 spin_unlock(&svcpt->scp_rep_lock);
2511 EXPORT_SYMBOL(target_send_reply);
2513 ldlm_mode_t lck_compat_array[] = {
2514 [LCK_EX] LCK_COMPAT_EX,
2515 [LCK_PW] LCK_COMPAT_PW,
2516 [LCK_PR] LCK_COMPAT_PR,
2517 [LCK_CW] LCK_COMPAT_CW,
2518 [LCK_CR] LCK_COMPAT_CR,
2519 [LCK_NL] LCK_COMPAT_NL,
2520 [LCK_GROUP] LCK_COMPAT_GROUP,
2521 [LCK_COS] LCK_COMPAT_COS,
2525 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2526 * not escape to the user level.
2528 int ldlm_error2errno(ldlm_error_t error)
2536 case ELDLM_LOCK_CHANGED:
2539 case ELDLM_LOCK_ABORTED:
2542 case ELDLM_LOCK_REPLACED:
2545 case ELDLM_NO_LOCK_DATA:
2548 case ELDLM_NAMESPACE_EXISTS:
2551 case ELDLM_BAD_NAMESPACE:
2555 if (((int)error) < 0) /* cast to signed type */
2556 result = error; /* as ldlm_error_t can be unsigned */
2558 CERROR("Invalid DLM result code: %d\n", error);
2564 EXPORT_SYMBOL(ldlm_error2errno);
2567 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2569 ldlm_error_t ldlm_errno2error(int err_no)
2578 error = ELDLM_LOCK_CHANGED;
2581 error = ELDLM_LOCK_ABORTED;
2584 error = ELDLM_LOCK_REPLACED;
2587 error = ELDLM_NO_LOCK_DATA;
2590 error = ELDLM_NAMESPACE_EXISTS;
2593 error = ELDLM_BAD_NAMESPACE;
2600 EXPORT_SYMBOL(ldlm_errno2error);
2602 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2603 void ldlm_dump_export_locks(struct obd_export *exp)
2605 spin_lock(&exp->exp_locks_list_guard);
2606 if (!cfs_list_empty(&exp->exp_locks_list)) {
2607 struct ldlm_lock *lock;
2609 CERROR("dumping locks for export %p,"
2610 "ignore if the unmount doesn't hang\n", exp);
2611 cfs_list_for_each_entry(lock, &exp->exp_locks_list,
2613 LDLM_ERROR(lock, "lock:");
2615 spin_unlock(&exp->exp_locks_list_guard);
2619 #ifdef HAVE_SERVER_SUPPORT
2620 static int target_bulk_timeout(void *data)
2623 /* We don't fail the connection here, because having the export
2624 * killed makes the (vital) call to commitrw very sad.
2629 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2631 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2634 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2635 struct l_wait_info *lwi)
2637 struct ptlrpc_request *req = desc->bd_req;
2638 time_t start = cfs_time_current_sec();
2643 /* If there is eviction in progress, wait for it to finish. */
2644 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2645 *lwi = LWI_INTR(NULL, NULL);
2646 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2647 !cfs_atomic_read(&exp->exp_obd->
2648 obd_evict_inprogress),
2652 /* Check if client was evicted or reconnected already. */
2653 if (exp->exp_failed ||
2654 exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
2657 if (desc->bd_type == BULK_PUT_SINK)
2658 rc = sptlrpc_svc_wrap_bulk(req, desc);
2660 rc = ptlrpc_start_bulk_transfer(desc);
2664 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2665 bulk2type(desc), rc);
2669 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2670 ptlrpc_abort_bulk(desc);
2675 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2676 cfs_duration_t timeout = timeoutl <= 0 ?
2677 CFS_TICK : cfs_time_seconds(timeoutl);
2679 *lwi = LWI_TIMEOUT_INTERVAL(timeout, cfs_time_seconds(1),
2680 target_bulk_timeout, desc);
2681 rc = l_wait_event(desc->bd_waitq,
2682 !ptlrpc_server_bulk_active(desc) ||
2685 lustre_msg_get_conn_cnt(req->rq_reqmsg),
2687 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2688 /* Wait again if we changed deadline. */
2689 } while ((rc == -ETIMEDOUT) &&
2690 (req->rq_deadline > cfs_time_current_sec()));
2692 if (rc == -ETIMEDOUT) {
2693 DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %ld%+lds",
2694 bulk2type(desc), req->rq_deadline - start,
2695 cfs_time_current_sec() - req->rq_deadline);
2696 ptlrpc_abort_bulk(desc);
2697 } else if (exp->exp_failed) {
2698 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2701 ptlrpc_abort_bulk(desc);
2702 } else if (exp->exp_conn_cnt >
2703 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
2704 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2706 /* We don't reply anyway. */
2708 ptlrpc_abort_bulk(desc);
2709 } else if (desc->bd_failure ||
2710 desc->bd_nob_transferred != desc->bd_nob) {
2711 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2712 desc->bd_failure ? "network error on" : "truncated",
2713 bulk2type(desc), desc->bd_nob_transferred,
2715 /* XXX Should this be a different errno? */
2717 } else if (desc->bd_type == BULK_GET_SINK) {
2718 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2723 EXPORT_SYMBOL(target_bulk_io);
2725 #endif /* HAVE_SERVER_SUPPORT */