1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
40 # define EXPORT_SYMTAB
42 #define DEBUG_SUBSYSTEM S_LDLM
45 # include <libcfs/libcfs.h>
47 # include <liblustre.h>
50 #include <lustre_mds.h>
51 #include <lustre_dlm.h>
52 #include <lustre_net.h>
53 #include <lustre_sec.h>
54 #include "ldlm_internal.h"
56 /* @priority: if non-zero, move the selected to the list head
57 * @create: if zero, only search in existed connections
59 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
60 int priority, int create)
62 struct ptlrpc_connection *ptlrpc_conn;
63 struct obd_import_conn *imp_conn = NULL, *item;
67 if (!create && !priority) {
68 CDEBUG(D_HA, "Nothing to do\n");
72 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
74 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
79 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
81 GOTO(out_put, rc = -ENOMEM);
85 cfs_spin_lock(&imp->imp_lock);
86 cfs_list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
87 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
89 cfs_list_del(&item->oic_item);
90 cfs_list_add(&item->oic_item,
92 item->oic_last_attempt = 0;
94 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
95 imp, imp->imp_obd->obd_name, uuid->uuid,
96 (priority ? ", moved to head" : ""));
97 cfs_spin_unlock(&imp->imp_lock);
98 GOTO(out_free, rc = 0);
103 imp_conn->oic_conn = ptlrpc_conn;
104 imp_conn->oic_uuid = *uuid;
105 imp_conn->oic_last_attempt = 0;
107 cfs_list_add(&imp_conn->oic_item, &imp->imp_conn_list);
109 cfs_list_add_tail(&imp_conn->oic_item,
110 &imp->imp_conn_list);
111 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
112 imp, imp->imp_obd->obd_name, uuid->uuid,
113 (priority ? "head" : "tail"));
115 cfs_spin_unlock(&imp->imp_lock);
116 GOTO(out_free, rc = -ENOENT);
119 cfs_spin_unlock(&imp->imp_lock);
123 OBD_FREE(imp_conn, sizeof(*imp_conn));
125 ptlrpc_connection_put(ptlrpc_conn);
129 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
131 return import_set_conn(imp, uuid, 1, 0);
134 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
137 return import_set_conn(imp, uuid, priority, 1);
140 int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
142 struct obd_import_conn *imp_conn;
143 struct obd_export *dlmexp;
147 cfs_spin_lock(&imp->imp_lock);
148 if (cfs_list_empty(&imp->imp_conn_list)) {
149 LASSERT(!imp->imp_connection);
153 cfs_list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
154 if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
156 LASSERT(imp_conn->oic_conn);
158 /* is current conn? */
159 if (imp_conn == imp->imp_conn_current) {
160 LASSERT(imp_conn->oic_conn == imp->imp_connection);
162 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
163 imp->imp_state != LUSTRE_IMP_DISCON) {
164 CERROR("can't remove current connection\n");
165 GOTO(out, rc = -EBUSY);
168 ptlrpc_connection_put(imp->imp_connection);
169 imp->imp_connection = NULL;
171 dlmexp = class_conn2export(&imp->imp_dlm_handle);
172 if (dlmexp && dlmexp->exp_connection) {
173 LASSERT(dlmexp->exp_connection ==
175 ptlrpc_connection_put(dlmexp->exp_connection);
176 dlmexp->exp_connection = NULL;
180 cfs_list_del(&imp_conn->oic_item);
181 ptlrpc_connection_put(imp_conn->oic_conn);
182 OBD_FREE(imp_conn, sizeof(*imp_conn));
183 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
184 imp, imp->imp_obd->obd_name, uuid->uuid);
189 cfs_spin_unlock(&imp->imp_lock);
191 CERROR("connection %s not found\n", uuid->uuid);
196 * Find conn uuid by peer nid. @peer is a server nid. This function is used
197 * to find a conn uuid of @imp which can reach @peer.
199 int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
200 struct obd_uuid *uuid)
202 struct obd_import_conn *conn;
206 cfs_spin_lock(&imp->imp_lock);
207 cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
208 /* check if conn uuid does have this peer nid */
209 if (class_check_uuid(&conn->oic_uuid, peer)) {
210 *uuid = conn->oic_uuid;
215 cfs_spin_unlock(&imp->imp_lock);
218 EXPORT_SYMBOL(client_import_find_conn);
220 void client_destroy_import(struct obd_import *imp)
222 /* drop security policy instance after all rpc finished/aborted
223 * to let all busy contexts be released. */
224 class_import_get(imp);
225 class_destroy_import(imp);
226 sptlrpc_import_sec_put(imp);
227 class_import_put(imp);
229 EXPORT_SYMBOL(client_destroy_import);
231 /* configure an RPC client OBD device
236 * 3 - inactive-on-startup
238 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
240 struct client_obd *cli = &obddev->u.cli;
241 struct obd_import *imp;
242 struct obd_uuid server_uuid;
243 int rq_portal, rp_portal, connect_op;
244 char *name = obddev->obd_type->typ_name;
245 ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN;
249 /* In a more perfect world, we would hang a ptlrpc_client off of
250 * obd_type and just use the values from there. */
251 if (!strcmp(name, LUSTRE_OSC_NAME)) {
252 rq_portal = OST_REQUEST_PORTAL;
253 rp_portal = OSC_REPLY_PORTAL;
254 connect_op = OST_CONNECT;
255 cli->cl_sp_me = LUSTRE_SP_CLI;
256 cli->cl_sp_to = LUSTRE_SP_OST;
257 ns_type = LDLM_NS_TYPE_OSC;
259 } else if (!strcmp(name, LUSTRE_MDC_NAME)) {
260 rq_portal = MDS_REQUEST_PORTAL;
261 rp_portal = MDC_REPLY_PORTAL;
262 connect_op = MDS_CONNECT;
263 cli->cl_sp_me = LUSTRE_SP_CLI;
264 cli->cl_sp_to = LUSTRE_SP_MDT;
265 ns_type = LDLM_NS_TYPE_MDC;
267 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
268 rq_portal = MGS_REQUEST_PORTAL;
269 rp_portal = MGC_REPLY_PORTAL;
270 connect_op = MGS_CONNECT;
271 cli->cl_sp_me = LUSTRE_SP_MGC;
272 cli->cl_sp_to = LUSTRE_SP_MGS;
273 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
274 ns_type = LDLM_NS_TYPE_MGC;
277 CERROR("unknown client OBD type \"%s\", can't setup\n",
282 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
283 CERROR("requires a TARGET UUID\n");
287 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
288 CERROR("client UUID must be less than 38 characters\n");
292 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
293 CERROR("setup requires a SERVER UUID\n");
297 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
298 CERROR("target UUID must be less than 38 characters\n");
302 cfs_init_rwsem(&cli->cl_sem);
303 cfs_sema_init(&cli->cl_mgc_sem, 1);
304 cli->cl_conn_count = 0;
305 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
306 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
307 sizeof(server_uuid)));
310 cli->cl_avail_grant = 0;
311 /* FIXME: should limit this for the sum of all cl_dirty_max */
312 cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
313 if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > cfs_num_physpages / 8)
314 cli->cl_dirty_max = cfs_num_physpages << (CFS_PAGE_SHIFT - 3);
315 CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters);
316 CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list);
317 CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
318 CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list);
319 CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list);
320 client_obd_list_lock_init(&cli->cl_loi_list_lock);
321 cli->cl_r_in_flight = 0;
322 cli->cl_w_in_flight = 0;
324 cfs_spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
325 cfs_spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
326 cfs_spin_lock_init(&cli->cl_read_page_hist.oh_lock);
327 cfs_spin_lock_init(&cli->cl_write_page_hist.oh_lock);
328 cfs_spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
329 cfs_spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
330 cfs_waitq_init(&cli->cl_destroy_waitq);
331 cfs_atomic_set(&cli->cl_destroy_in_flight, 0);
332 #ifdef ENABLE_CHECKSUM
333 /* Turn on checksumming by default. */
334 cli->cl_checksum = 1;
336 * The supported checksum types will be worked out at connect time
337 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
340 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
342 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
344 /* This value may be changed at connect time in
345 ptlrpc_connect_interpret. */
346 cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES,
347 (int)(1024 * 1024 >> CFS_PAGE_SHIFT));
349 if (!strcmp(name, LUSTRE_MDC_NAME)) {
350 cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT;
351 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) {
352 cli->cl_max_rpcs_in_flight = 2;
353 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) {
354 cli->cl_max_rpcs_in_flight = 3;
355 } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) {
356 cli->cl_max_rpcs_in_flight = 4;
358 cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
363 CERROR("ldlm_get_ref failed: %d\n", rc);
367 ptlrpc_init_client(rq_portal, rp_portal, name,
368 &obddev->obd_ldlm_client);
370 imp = class_new_import(obddev);
372 GOTO(err_ldlm, rc = -ENOENT);
373 imp->imp_client = &obddev->obd_ldlm_client;
374 imp->imp_connect_op = connect_op;
375 CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain);
376 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
377 LUSTRE_CFG_BUFLEN(lcfg, 1));
378 class_import_put(imp);
380 rc = client_import_add_conn(imp, &server_uuid, 1);
382 CERROR("can't add initial connection\n");
383 GOTO(err_import, rc);
386 cli->cl_import = imp;
387 /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */
388 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
389 cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
391 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
392 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
393 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
394 name, obddev->obd_name,
395 cli->cl_target_uuid.uuid);
396 cfs_spin_lock(&imp->imp_lock);
397 imp->imp_deactive = 1;
398 cfs_spin_unlock(&imp->imp_lock);
402 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
403 LDLM_NAMESPACE_CLIENT,
404 LDLM_NAMESPACE_GREEDY,
406 if (obddev->obd_namespace == NULL) {
407 CERROR("Unable to create client namespace - %s\n",
409 GOTO(err_import, rc = -ENOMEM);
412 cli->cl_qchk_stat = CL_NOT_QUOTACHECKED;
417 class_destroy_import(imp);
425 int client_obd_cleanup(struct obd_device *obddev)
429 ldlm_namespace_free_post(obddev->obd_namespace);
430 obddev->obd_namespace = NULL;
432 LASSERT(obddev->u.cli.cl_import == NULL);
438 /* ->o_connect() method for client side (OSC and MDC and MGC) */
439 int client_connect_import(const struct lu_env *env,
440 struct obd_export **exp,
441 struct obd_device *obd, struct obd_uuid *cluuid,
442 struct obd_connect_data *data, void *localdata)
444 struct client_obd *cli = &obd->u.cli;
445 struct obd_import *imp = cli->cl_import;
446 struct obd_connect_data *ocd;
447 struct lustre_handle conn = { 0 };
452 cfs_down_write(&cli->cl_sem);
453 if (cli->cl_conn_count > 0 )
454 GOTO(out_sem, rc = -EALREADY);
456 rc = class_connect(&conn, obd, cluuid);
460 cli->cl_conn_count++;
461 *exp = class_conn2export(&conn);
463 LASSERT(obd->obd_namespace);
465 imp->imp_dlm_handle = conn;
466 rc = ptlrpc_init_import(imp);
470 ocd = &imp->imp_connect_data;
473 imp->imp_connect_flags_orig = data->ocd_connect_flags;
476 rc = ptlrpc_connect_import(imp);
478 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
481 LASSERT((*exp)->exp_connection);
484 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
485 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
486 data->ocd_connect_flags, ocd->ocd_connect_flags);
487 data->ocd_connect_flags = ocd->ocd_connect_flags;
490 ptlrpc_pinger_add_import(imp);
496 cli->cl_conn_count--;
497 class_disconnect(*exp);
501 cfs_up_write(&cli->cl_sem);
506 int client_disconnect_export(struct obd_export *exp)
508 struct obd_device *obd = class_exp2obd(exp);
509 struct client_obd *cli;
510 struct obd_import *imp;
515 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
516 exp, exp ? exp->exp_handle.h_cookie : -1);
521 imp = cli->cl_import;
523 cfs_down_write(&cli->cl_sem);
524 CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name,
527 if (!cli->cl_conn_count) {
528 CERROR("disconnecting disconnected device (%s)\n",
530 GOTO(out_disconnect, rc = -EINVAL);
533 cli->cl_conn_count--;
534 if (cli->cl_conn_count)
535 GOTO(out_disconnect, rc = 0);
537 /* Mark import deactivated now, so we don't try to reconnect if any
538 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
539 * fully deactivate the import, or that would drop all requests. */
540 cfs_spin_lock(&imp->imp_lock);
541 imp->imp_deactive = 1;
542 cfs_spin_unlock(&imp->imp_lock);
544 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
545 * delete it regardless. (It's safe to delete an import that was
547 (void)ptlrpc_pinger_del_import(imp);
549 if (obd->obd_namespace != NULL) {
550 /* obd_force == local only */
551 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
552 obd->obd_force ? LCF_LOCAL : 0, NULL);
553 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
557 * there's no need to hold sem during disconnecting an import,
558 * and actually it may cause deadlock in gss.
560 cfs_up_write(&cli->cl_sem);
561 rc = ptlrpc_disconnect_import(imp, 0);
562 cfs_down_write(&cli->cl_sem);
564 ptlrpc_invalidate_import(imp);
569 /* use server style - class_disconnect should be always called for
571 err = class_disconnect(exp);
575 cfs_up_write(&cli->cl_sem);
580 int server_disconnect_export(struct obd_export *exp)
585 /* Disconnect early so that clients can't keep using export */
586 rc = class_disconnect(exp);
587 /* close import for avoid sending any requests */
588 if (exp->exp_imp_reverse)
589 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
591 if (exp->exp_obd->obd_namespace != NULL)
592 ldlm_cancel_locks_for_export(exp);
594 /* complete all outstanding replies */
595 cfs_spin_lock(&exp->exp_lock);
596 while (!cfs_list_empty(&exp->exp_outstanding_replies)) {
597 struct ptlrpc_reply_state *rs =
598 cfs_list_entry(exp->exp_outstanding_replies.next,
599 struct ptlrpc_reply_state, rs_exp_list);
600 struct ptlrpc_service *svc = rs->rs_service;
602 cfs_spin_lock(&svc->srv_rs_lock);
603 cfs_list_del_init(&rs->rs_exp_list);
604 cfs_spin_lock(&rs->rs_lock);
605 ptlrpc_schedule_difficult_reply(rs);
606 cfs_spin_unlock(&rs->rs_lock);
607 cfs_spin_unlock(&svc->srv_rs_lock);
609 cfs_spin_unlock(&exp->exp_lock);
614 /* --------------------------------------------------------------------------
615 * from old lib/target.c
616 * -------------------------------------------------------------------------- */
618 static int target_handle_reconnect(struct lustre_handle *conn,
619 struct obd_export *exp,
620 struct obd_uuid *cluuid)
624 if (exp->exp_connection && exp->exp_imp_reverse) {
625 struct lustre_handle *hdl;
626 struct obd_device *target;
628 hdl = &exp->exp_imp_reverse->imp_remote_handle;
629 target = exp->exp_obd;
631 /* Might be a re-connect after a partition. */
632 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
633 if (target->obd_recovering) {
634 int timeout = cfs_duration_sec(cfs_time_sub(
636 &target->obd_recovery_timer),
637 cfs_time_current()));
639 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
640 "ing, waiting for %d clients in recov"
641 "ery for %d:%.02d\n", target->obd_name,
642 obd_uuid2str(&exp->exp_client_uuid),
643 obd_export_nid2str(exp),
644 target->obd_max_recoverable_clients,
645 timeout / 60, timeout % 60);
647 LCONSOLE_WARN("%s: Client %s (at %s) "
648 "reconnecting\n", target->obd_name,
649 obd_uuid2str(&exp->exp_client_uuid),
650 obd_export_nid2str(exp));
653 conn->cookie = exp->exp_handle.h_cookie;
654 /* target_handle_connect() treats EALREADY and
655 * -EALREADY differently. EALREADY means we are
656 * doing a valid reconnect from the same client. */
659 LCONSOLE_WARN("%s: The server has already connected "
660 "client %s (at %s) with handle " LPX64
661 ", rejecting a client with the same "
662 "uuid trying to reconnect with "
663 "handle " LPX64, target->obd_name,
664 obd_uuid2str(&exp->exp_client_uuid),
665 obd_export_nid2str(exp),
666 hdl->cookie, conn->cookie);
667 memset(conn, 0, sizeof *conn);
668 /* target_handle_connect() treats EALREADY and
669 * -EALREADY differently. -EALREADY is an error
670 * (same UUID, different handle). */
675 conn->cookie = exp->exp_handle.h_cookie;
676 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
677 cluuid->uuid, exp, conn->cookie);
681 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
684 struct obd_export *exp = cb_data;
686 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
687 obd->obd_name, exp->exp_client_uuid.uuid);
689 cfs_spin_lock(&exp->exp_lock);
690 exp->exp_need_sync = 0;
691 cfs_spin_unlock(&exp->exp_lock);
692 class_export_cb_put(exp);
694 EXPORT_SYMBOL(target_client_add_cb);
698 check_and_start_recovery_timer(struct obd_device *obd,
699 struct ptlrpc_request *req, int new_client);
702 check_and_start_recovery_timer(struct obd_device *obd,
703 struct ptlrpc_request *req, int new_client)
708 int target_handle_connect(struct ptlrpc_request *req)
710 struct obd_device *target, *targref = NULL;
711 struct obd_export *export = NULL;
712 struct obd_import *revimp;
713 struct lustre_handle conn;
714 struct lustre_handle *tmp;
715 struct obd_uuid tgtuuid;
716 struct obd_uuid cluuid;
717 struct obd_uuid remote_uuid;
723 struct obd_connect_data *data, *tmpdata;
725 lnet_nid_t *client_nid = NULL;
728 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
730 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
732 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
733 GOTO(out, rc = -EINVAL);
736 obd_str2uuid(&tgtuuid, str);
737 target = class_uuid2obd(&tgtuuid);
739 target = class_name2obd(str);
741 if (!target || target->obd_stopping || !target->obd_set_up) {
742 deuuidify(str, NULL, &target_start, &target_len);
743 LCONSOLE_ERROR_MSG(0x137, "%.*s: Not available for connect "
744 "from %s (%s)\n", target_len, target_start,
745 libcfs_nid2str(req->rq_peer.nid), !target ?
746 "no target" : (target->obd_stopping ?
747 "stopping" : "not set up"));
748 GOTO(out, rc = -ENODEV);
751 if (target->obd_no_conn) {
752 LCONSOLE_WARN("%s: Temporarily refusing client connection "
753 "from %s\n", target->obd_name,
754 libcfs_nid2str(req->rq_peer.nid));
755 GOTO(out, rc = -EAGAIN);
758 /* Make sure the target isn't cleaned up while we're here. Yes,
759 there's still a race between the above check and our incref here.
760 Really, class_uuid2obd should take the ref. */
761 targref = class_incref(target, __FUNCTION__, cfs_current());
764 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
766 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
767 GOTO(out, rc = -EINVAL);
770 obd_str2uuid(&cluuid, str);
772 /* XXX extract a nettype and format accordingly */
773 switch (sizeof(lnet_nid_t)) {
774 /* NB the casts only avoid compiler warnings */
776 snprintf(remote_uuid.uuid, sizeof remote_uuid,
777 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
780 snprintf(remote_uuid.uuid, sizeof remote_uuid,
781 "NET_%x_UUID", (__u32)req->rq_peer.nid);
787 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
789 GOTO(out, rc = -EPROTO);
793 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
795 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
797 GOTO(out, rc = -EPROTO);
799 rc = req_capsule_server_pack(&req->rq_pill);
803 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
805 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
806 "libclient connection attempt");
807 GOTO(out, rc = -EPROTO);
808 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
809 LUSTRE_VERSION_ALLOWED_OFFSET ||
810 data->ocd_version > LUSTRE_VERSION_CODE +
811 LUSTRE_VERSION_ALLOWED_OFFSET) {
812 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
813 "libclient connection attempt",
814 data->ocd_version < LUSTRE_VERSION_CODE ?
816 OBD_OCD_VERSION_MAJOR(data->ocd_version),
817 OBD_OCD_VERSION_MINOR(data->ocd_version),
818 OBD_OCD_VERSION_PATCH(data->ocd_version),
819 OBD_OCD_VERSION_FIX(data->ocd_version));
820 data = req_capsule_server_sized_get(&req->rq_pill,
822 offsetof(typeof(*data), ocd_version) +
823 sizeof(data->ocd_version));
825 data->ocd_connect_flags = OBD_CONNECT_VERSION;
826 data->ocd_version = LUSTRE_VERSION_CODE;
828 GOTO(out, rc = -EPROTO);
832 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
833 (data->ocd_connect_flags & OBD_CONNECT_MDS))
836 /* lctl gets a backstage, all-access pass. */
837 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
838 goto dont_check_exports;
840 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
844 /* we've found an export in the hash */
845 if (export->exp_connecting) { /* bug 9635, et. al. */
846 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
847 export->exp_obd->obd_name, export,
848 libcfs_nid2str(req->rq_peer.nid));
849 class_export_put(export);
852 } else if (mds_conn && export->exp_connection) {
853 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
854 /* mds reconnected after failover */
855 LCONSOLE_WARN("%s: Received MDS connection from "
856 "%s, removing former export from %s\n",
857 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
858 libcfs_nid2str(export->exp_connection->c_peer.nid));
860 /* new mds connection from the same nid */
861 LCONSOLE_WARN("%s: Received new MDS connection from "
862 "%s, removing former export from same NID\n",
863 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
864 class_fail_export(export);
865 class_export_put(export);
868 } else if (export->exp_connection != NULL &&
869 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
870 (lustre_msg_get_op_flags(req->rq_reqmsg) &
871 MSG_CONNECT_INITIAL)) {
872 /* in mds failover we have static uuid but nid can be
874 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
875 "existing nid %s is already connected\n",
876 target->obd_name, cluuid.uuid,
877 libcfs_nid2str(req->rq_peer.nid),
879 export->exp_connection->c_peer.nid));
881 class_export_put(export);
884 cfs_spin_lock(&export->exp_lock);
885 export->exp_connecting = 1;
886 cfs_spin_unlock(&export->exp_lock);
887 LASSERT(export->exp_obd == target);
889 rc = target_handle_reconnect(&conn, export, &cluuid);
892 /* If we found an export, we already unlocked. */
895 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
896 } else if (req->rq_export == NULL &&
897 cfs_atomic_read(&export->exp_rpc_count) > 0) {
898 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
899 "still busy with %d references\n",
900 target->obd_name, cluuid.uuid,
901 libcfs_nid2str(req->rq_peer.nid),
902 cfs_atomic_read(&export->exp_refcount));
903 GOTO(out, rc = -EBUSY);
904 } else if (req->rq_export != NULL &&
905 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
906 /* the current connect rpc has increased exp_rpc_count */
907 LCONSOLE_WARN("%s: Client %s (at %s) refused reconnection, "
908 "still busy with %d active RPCs\n",
909 target->obd_name, cluuid.uuid,
910 libcfs_nid2str(req->rq_peer.nid),
911 cfs_atomic_read(&export->exp_rpc_count) - 1);
912 cfs_spin_lock(&export->exp_lock);
913 if (req->rq_export->exp_conn_cnt <
914 lustre_msg_get_conn_cnt(req->rq_reqmsg))
915 /* try to abort active requests */
916 req->rq_export->exp_abort_active_req = 1;
917 cfs_spin_unlock(&export->exp_lock);
918 GOTO(out, rc = -EBUSY);
919 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
920 if (!strstr(cluuid.uuid, "mdt"))
921 LCONSOLE_WARN("%s: Rejecting reconnect from the "
922 "known client %s (at %s) because it "
923 "is indicating it is a new client",
924 target->obd_name, cluuid.uuid,
925 libcfs_nid2str(req->rq_peer.nid));
926 GOTO(out, rc = -EALREADY);
928 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
935 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
936 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
937 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
938 export, (long)cfs_time_current_sec(),
939 export ? (long)export->exp_last_request_time : 0);
941 /* If this is the first time a client connects, reset the recovery
943 if (rc == 0 && target->obd_recovering)
944 check_and_start_recovery_timer(target, req, export == NULL);
946 /* We want to handle EALREADY but *not* -EALREADY from
947 * target_handle_reconnect(), return reconnection state in a flag */
948 if (rc == EALREADY) {
949 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
955 /* Tell the client if we support replayable requests */
956 if (target->obd_replayable)
957 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
958 client_nid = &req->rq_peer.nid;
960 if (export == NULL) {
961 if (target->obd_recovering) {
964 t = cfs_timer_deadline(&target->obd_recovery_timer);
965 t = cfs_time_sub(t, cfs_time_current());
966 t = cfs_duration_sec(t);
967 LCONSOLE_WARN("%s: Denying connection for new client "
968 "%s (at %s), waiting for %d clients in "
969 "recovery for %d:%.02d\n",
971 libcfs_nid2str(req->rq_peer.nid),
973 cfs_atomic_read(&target-> \
974 obd_lock_replay_clients),
975 (int)t / 60, (int)t % 60);
979 rc = obd_connect(req->rq_svc_thread->t_env,
980 &export, target, &cluuid, data,
983 conn.cookie = export->exp_handle.h_cookie;
984 /* LU-1092 reconnect put export refcount in the
985 * end, connect needs take one here too. */
986 class_export_get(export);
990 rc = obd_reconnect(req->rq_svc_thread->t_env,
991 export, target, &cluuid, data, client_nid);
993 /* prevous done via class_conn2export */
994 class_export_get(export);
999 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1000 data->ocd_instance = target->u.obt.obt_instance;
1002 /* Return only the parts of obd_connect_data that we understand, so the
1003 * client knows that we don't understand the rest. */
1005 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1007 tmpdata = req_capsule_server_get(&req->rq_pill,
1009 /* Don't use struct assignment here, because the client reply
1010 * buffer may be smaller/larger than the local struct
1011 * obd_connect_data. */
1012 memcpy(tmpdata, data, min(tmpsize, size));
1015 /* If all else goes well, this is our RPC return code. */
1018 lustre_msg_set_handle(req->rq_repmsg, &conn);
1020 /* If the client and the server are the same node, we will already
1021 * have an export that really points to the client's DLM export,
1022 * because we have a shared handles table.
1024 * XXX this will go away when shaver stops sending the "connect" handle
1025 * in the real "remote handle" field of the request --phik 24 Apr 2003
1027 if (req->rq_export != NULL)
1028 class_export_put(req->rq_export);
1030 req->rq_export = export;
1032 cfs_spin_lock(&export->exp_lock);
1033 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1034 cfs_spin_unlock(&export->exp_lock);
1035 CDEBUG(D_RPCTRACE, "%s: %s already connected at higher "
1036 "conn_cnt: %d > %d\n",
1037 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1038 export->exp_conn_cnt,
1039 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1041 GOTO(out, rc = -EALREADY);
1043 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1044 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1045 export->exp_abort_active_req = 0;
1047 /* request from liblustre? Don't evict it for not pinging. */
1048 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1049 export->exp_libclient = 1;
1050 cfs_spin_unlock(&export->exp_lock);
1052 cfs_spin_lock(&target->obd_dev_lock);
1053 cfs_list_del_init(&export->exp_obd_chain_timed);
1054 cfs_spin_unlock(&target->obd_dev_lock);
1056 cfs_spin_unlock(&export->exp_lock);
1059 if (export->exp_connection != NULL) {
1060 /* Check to see if connection came from another NID */
1061 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1062 !cfs_hlist_unhashed(&export->exp_nid_hash))
1063 cfs_hash_del(export->exp_obd->obd_nid_hash,
1064 &export->exp_connection->c_peer.nid,
1065 &export->exp_nid_hash);
1067 ptlrpc_connection_put(export->exp_connection);
1070 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1073 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1074 cfs_hash_add(export->exp_obd->obd_nid_hash,
1075 &export->exp_connection->c_peer.nid,
1076 &export->exp_nid_hash);
1079 class_disconnect->class_export_recovery_cleanup() race
1081 if (target->obd_recovering && !export->exp_in_recovery) {
1083 __u64 transno = data->ocd_transno;
1085 cfs_spin_lock(&export->exp_lock);
1086 export->exp_in_recovery = 1;
1087 export->exp_req_replay_needed = 1;
1088 export->exp_lock_replay_needed = 1;
1089 cfs_spin_unlock(&export->exp_lock);
1091 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1092 MSG_CONNECT_TRANSNO);
1093 if (has_transno && transno == 0)
1094 CWARN("Connect with zero transno!\n");
1096 if (has_transno && transno > 0 &&
1097 transno < target->obd_next_recovery_transno &&
1098 transno > target->obd_last_committed) {
1099 /* another way is to use cmpxchg() so it will be
1101 cfs_spin_lock(&target->obd_recovery_task_lock);
1102 if (transno < target->obd_next_recovery_transno)
1103 target->obd_next_recovery_transno = transno;
1104 cfs_spin_unlock(&target->obd_recovery_task_lock);
1107 cfs_atomic_inc(&target->obd_req_replay_clients);
1108 cfs_atomic_inc(&target->obd_lock_replay_clients);
1109 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1110 target->obd_max_recoverable_clients)
1111 cfs_waitq_signal(&target->obd_next_transno_waitq);
1114 /* Tell the client we're in recovery, when client is involved in it. */
1115 if (target->obd_recovering)
1116 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1118 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1121 if (export->exp_imp_reverse != NULL) {
1122 /* destroyed import can be still referenced in ctxt */
1123 obd_set_info_async(export, sizeof(KEY_REVIMP_UPD),
1124 KEY_REVIMP_UPD, 0, NULL, NULL);
1126 client_destroy_import(export->exp_imp_reverse);
1129 /* for the rest part, we return -ENOTCONN in case of errors
1130 * in order to let client initialize connection again.
1132 revimp = export->exp_imp_reverse = class_new_import(target);
1134 CERROR("fail to alloc new reverse import.\n");
1135 GOTO(out, rc = -ENOTCONN);
1138 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1139 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1140 revimp->imp_remote_handle = conn;
1141 revimp->imp_dlm_fake = 1;
1142 revimp->imp_state = LUSTRE_IMP_FULL;
1144 /* unknown versions will be caught in
1145 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
1146 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1148 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
1149 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1150 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1152 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1154 if ((export->exp_connect_flags & OBD_CONNECT_FULL20) &&
1155 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1156 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1158 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1160 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1162 CERROR("Failed to get sec for reverse import: %d\n", rc);
1163 export->exp_imp_reverse = NULL;
1164 class_destroy_import(revimp);
1167 class_import_put(revimp);
1170 cfs_spin_lock(&export->exp_lock);
1171 export->exp_connecting = 0;
1172 cfs_spin_unlock(&export->exp_lock);
1174 class_export_put(export);
1177 class_decref(targref, __FUNCTION__, cfs_current());
1179 req->rq_status = rc;
1183 int target_handle_disconnect(struct ptlrpc_request *req)
1188 rc = req_capsule_server_pack(&req->rq_pill);
1192 /* keep the rq_export around so we can send the reply */
1193 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1198 void target_destroy_export(struct obd_export *exp)
1200 /* exports created from last_rcvd data, and "fake"
1201 exports created by lctl don't have an import */
1202 if (exp->exp_imp_reverse != NULL)
1203 client_destroy_import(exp->exp_imp_reverse);
1205 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1206 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1207 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1208 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1212 * Recovery functions
1214 static void target_request_copy_get(struct ptlrpc_request *req)
1216 class_export_rpc_get(req->rq_export);
1217 LASSERT(cfs_list_empty(&req->rq_list));
1218 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1220 /* increase refcount to keep request in queue */
1221 cfs_atomic_inc(&req->rq_refcount);
1222 /** let export know it has replays to be handled */
1223 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1226 static void target_request_copy_put(struct ptlrpc_request *req)
1228 LASSERT(cfs_list_empty(&req->rq_replay_list));
1229 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1231 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1232 class_export_rpc_put(req->rq_export);
1233 ptlrpc_server_drop_request(req);
1236 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1238 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1239 struct obd_export *exp = req->rq_export;
1240 struct ptlrpc_request *reqiter;
1245 cfs_spin_lock(&exp->exp_lock);
1246 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1248 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1255 /* we expect it with RESENT and REPLAY flags */
1256 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1257 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1258 CERROR("invalid flags %x of resent replay\n",
1259 lustre_msg_get_flags(req->rq_reqmsg));
1261 cfs_list_add_tail(&req->rq_replay_list,
1262 &exp->exp_req_replay_queue);
1265 cfs_spin_unlock(&exp->exp_lock);
1269 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1271 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1272 LASSERT(req->rq_export);
1274 cfs_spin_lock(&req->rq_export->exp_lock);
1275 cfs_list_del_init(&req->rq_replay_list);
1276 cfs_spin_unlock(&req->rq_export->exp_lock);
1280 static void target_finish_recovery(struct obd_device *obd)
1282 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1283 obd->obd_recovery_start);
1286 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1287 "%d recovered and %d %s evicted.\n", obd->obd_name,
1288 (int)elapsed_time / 60, (int)elapsed_time % 60,
1289 obd->obd_max_recoverable_clients,
1290 cfs_atomic_read(&obd->obd_connected_clients),
1291 obd->obd_stale_clients,
1292 obd->obd_stale_clients == 1 ? "was" : "were");
1294 ldlm_reprocess_all_ns(obd->obd_namespace);
1295 cfs_spin_lock(&obd->obd_recovery_task_lock);
1296 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1297 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1298 !cfs_list_empty(&obd->obd_final_req_queue)) {
1299 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1301 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1302 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1304 cfs_list_empty(&obd->obd_final_req_queue) ? \
1306 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1309 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1311 obd->obd_recovery_end = cfs_time_current_sec();
1313 /* when recovery finished, cleanup orphans on mds and ost */
1314 if (OBT(obd) && OBP(obd, postrecov)) {
1315 int rc = OBP(obd, postrecov)(obd);
1317 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1323 static void abort_req_replay_queue(struct obd_device *obd)
1325 struct ptlrpc_request *req, *n;
1326 cfs_list_t abort_list;
1328 CFS_INIT_LIST_HEAD(&abort_list);
1329 cfs_spin_lock(&obd->obd_recovery_task_lock);
1330 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1331 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1332 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1333 DEBUG_REQ(D_WARNING, req, "aborted:");
1334 req->rq_status = -ENOTCONN;
1335 if (ptlrpc_error(req)) {
1336 DEBUG_REQ(D_ERROR, req,
1337 "failed abort_req_reply; skipping");
1339 target_exp_dequeue_req_replay(req);
1340 target_request_copy_put(req);
1344 static void abort_lock_replay_queue(struct obd_device *obd)
1346 struct ptlrpc_request *req, *n;
1347 cfs_list_t abort_list;
1349 CFS_INIT_LIST_HEAD(&abort_list);
1350 cfs_spin_lock(&obd->obd_recovery_task_lock);
1351 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1352 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1353 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1354 DEBUG_REQ(D_ERROR, req, "aborted:");
1355 req->rq_status = -ENOTCONN;
1356 if (ptlrpc_error(req)) {
1357 DEBUG_REQ(D_ERROR, req,
1358 "failed abort_lock_reply; skipping");
1360 target_request_copy_put(req);
1364 /* Called from a cleanup function if the device is being cleaned up
1365 forcefully. The exports should all have been disconnected already,
1366 the only thing left to do is
1367 - clear the recovery flags
1369 - free queued requests and replies, but don't send replies
1370 Because the obd_stopping flag is set, no new requests should be received.
1373 void target_cleanup_recovery(struct obd_device *obd)
1375 struct ptlrpc_request *req, *n;
1376 cfs_list_t clean_list;
1379 CFS_INIT_LIST_HEAD(&clean_list);
1380 cfs_spin_lock(&obd->obd_dev_lock);
1381 if (!obd->obd_recovering) {
1382 cfs_spin_unlock(&obd->obd_dev_lock);
1386 obd->obd_recovering = obd->obd_abort_recovery = 0;
1387 cfs_spin_unlock(&obd->obd_dev_lock);
1389 cfs_spin_lock(&obd->obd_recovery_task_lock);
1390 target_cancel_recovery_timer(obd);
1391 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1392 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1394 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1395 LASSERT(req->rq_reply_state == 0);
1396 target_exp_dequeue_req_replay(req);
1397 target_request_copy_put(req);
1400 cfs_spin_lock(&obd->obd_recovery_task_lock);
1401 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1402 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1403 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1405 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1406 LASSERT(req->rq_reply_state == 0);
1407 target_request_copy_put(req);
1413 /* obd_recovery_task_lock should be held */
1414 void target_cancel_recovery_timer(struct obd_device *obd)
1416 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1417 cfs_timer_disarm(&obd->obd_recovery_timer);
1420 static void target_start_recovery_timer(struct obd_device *obd)
1422 if (obd->obd_recovery_start != 0)
1425 cfs_spin_lock(&obd->obd_dev_lock);
1426 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1427 cfs_spin_unlock(&obd->obd_dev_lock);
1431 LASSERT(obd->obd_recovery_timeout != 0);
1433 if (obd->obd_recovery_start != 0) {
1434 cfs_spin_unlock(&obd->obd_dev_lock);
1438 cfs_timer_arm(&obd->obd_recovery_timer,
1439 cfs_time_shift(obd->obd_recovery_timeout));
1440 obd->obd_recovery_start = cfs_time_current_sec();
1441 cfs_spin_unlock(&obd->obd_dev_lock);
1443 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1444 "or until %d client%s reconnect%s\n",
1446 obd->obd_recovery_timeout / 60,
1447 obd->obd_recovery_timeout % 60,
1448 obd->obd_max_recoverable_clients,
1449 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1450 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1454 * extend recovery window.
1456 * if @extend is true, extend recovery window to have @drt remaining at least;
1457 * otherwise, make sure the recovery timeout value is not less than @drt.
1459 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1463 cfs_duration_t left;
1466 cfs_spin_lock(&obd->obd_dev_lock);
1467 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1468 cfs_spin_unlock(&obd->obd_dev_lock);
1471 LASSERT(obd->obd_recovery_start != 0);
1473 now = cfs_time_current_sec();
1474 to = obd->obd_recovery_timeout;
1475 end = obd->obd_recovery_start + to;
1476 left = cfs_time_sub(end, now);
1478 if (extend && (drt > left)) {
1480 } else if (!extend && (drt > to)) {
1482 /* reduce drt by already passed time */
1483 drt -= obd->obd_recovery_timeout - left;
1486 if (to > obd->obd_recovery_time_hard)
1487 to = obd->obd_recovery_time_hard;
1488 if (obd->obd_recovery_timeout < to) {
1489 obd->obd_recovery_timeout = to;
1490 cfs_timer_arm(&obd->obd_recovery_timer,
1491 cfs_time_shift(drt));
1493 cfs_spin_unlock(&obd->obd_dev_lock);
1495 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1496 obd->obd_name, (unsigned)drt);
1499 /* Reset the timer with each new client connection */
1501 * This timer is actually reconnect_timer, which is for making sure
1502 * the total recovery window is at least as big as my reconnect
1503 * attempt timing. So the initial recovery time_out will be set to
1504 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1505 * from client is bigger than this, then the recovery time_out will
1506 * be extended to make sure the client could be reconnected, in the
1507 * process, the timeout from the new client should be ignored.
1511 check_and_start_recovery_timer(struct obd_device *obd,
1512 struct ptlrpc_request *req,
1515 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1516 struct obd_device_target *obt = &obd->u.obt;
1517 struct lustre_sb_info *lsi;
1519 if (!new_client && service_time)
1520 /* Teach server about old server's estimates, as first guess
1521 * at how long new requests will take. */
1522 at_measured(&req->rq_rqbd->rqbd_service->srv_at_estimate,
1525 target_start_recovery_timer(obd);
1527 /* convert the service time to rpc timeout,
1528 * reuse service_time to limit stack usage */
1529 service_time = at_est2timeout(service_time);
1531 /* We expect other clients to timeout within service_time, then try
1532 * to reconnect, then try the failover server. The max delay between
1533 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL */
1534 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1536 LASSERT(obt->obt_magic == OBT_MAGIC);
1537 lsi = s2lsi(obt->obt_sb);
1538 if (!(lsi->lsi_flags | LSI_IR_CAPABLE))
1539 service_time += 2 * (CONNECTION_SWITCH_MAX +
1540 CONNECTION_SWITCH_INC);
1541 if (service_time > obd->obd_recovery_timeout && !new_client)
1542 extend_recovery_timer(obd, service_time, false);
1545 /** Health checking routines */
1546 static inline int exp_connect_healthy(struct obd_export *exp)
1548 return (exp->exp_in_recovery);
1551 /** if export done req_replay or has replay in queue */
1552 static inline int exp_req_replay_healthy(struct obd_export *exp)
1554 return (!exp->exp_req_replay_needed ||
1555 cfs_atomic_read(&exp->exp_replay_count) > 0);
1557 /** if export done lock_replay or has replay in queue */
1558 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1560 return (!exp->exp_lock_replay_needed ||
1561 cfs_atomic_read(&exp->exp_replay_count) > 0);
1564 static inline int exp_vbr_healthy(struct obd_export *exp)
1566 return (!exp->exp_vbr_failed);
1569 static inline int exp_finished(struct obd_export *exp)
1571 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1574 /** Checking routines for recovery */
1575 static int check_for_clients(struct obd_device *obd)
1577 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1579 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1581 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1582 if (obd->obd_no_conn == 0 &&
1583 clnts + obd->obd_stale_clients == obd->obd_max_recoverable_clients)
1588 static int check_for_next_transno(struct obd_device *obd)
1590 struct ptlrpc_request *req = NULL;
1591 int wake_up = 0, connected, completed, queue_len;
1592 __u64 next_transno, req_transno;
1595 cfs_spin_lock(&obd->obd_recovery_task_lock);
1596 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1597 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1598 struct ptlrpc_request, rq_list);
1599 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1604 connected = cfs_atomic_read(&obd->obd_connected_clients);
1605 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1606 queue_len = obd->obd_requests_queued_for_recovery;
1607 next_transno = obd->obd_next_recovery_transno;
1609 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1610 "req_transno: "LPU64", next_transno: "LPU64"\n",
1611 obd->obd_max_recoverable_clients, connected, completed,
1612 queue_len, req_transno, next_transno);
1614 if (obd->obd_abort_recovery) {
1615 CDEBUG(D_HA, "waking for aborted recovery\n");
1617 } else if (obd->obd_recovery_expired) {
1618 CDEBUG(D_HA, "waking for expired recovery\n");
1620 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1621 CDEBUG(D_HA, "waking for completed recovery\n");
1623 } else if (req_transno == next_transno) {
1624 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1626 } else if (queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1628 /** handle gaps occured due to lost reply or VBR */
1629 LASSERTF(req_transno >= next_transno,
1630 "req_transno: "LPU64", next_transno: "LPU64"\n",
1631 req_transno, next_transno);
1632 if (req_transno > obd->obd_last_committed &&
1633 !obd->obd_version_recov)
1636 "%s: waking for gap in transno, VBR is %s (skip: "
1637 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1638 ", last_committed: "LPD64")\n",
1639 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1640 next_transno, queue_len, completed, connected,
1641 req_transno, obd->obd_last_committed);
1642 obd->obd_next_recovery_transno = req_transno;
1644 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1645 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1646 " by fail_lock, waking up ("LPD64")\n", next_transno);
1647 obd->obd_next_recovery_transno = req_transno;
1650 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1654 static int check_for_next_lock(struct obd_device *obd)
1658 cfs_spin_lock(&obd->obd_recovery_task_lock);
1659 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1660 CDEBUG(D_HA, "waking for next lock\n");
1662 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1663 CDEBUG(D_HA, "waking for completed lock replay\n");
1665 } else if (obd->obd_abort_recovery) {
1666 CDEBUG(D_HA, "waking for aborted recovery\n");
1668 } else if (obd->obd_recovery_expired) {
1669 CDEBUG(D_HA, "waking for expired recovery\n");
1672 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1678 * wait for recovery events,
1679 * check its status with help of check_routine
1680 * evict dead clients via health_check
1682 static int target_recovery_overseer(struct obd_device *obd,
1683 int (*check_routine)(struct obd_device *),
1684 int (*health_check)(struct obd_export *))
1687 cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1688 if (obd->obd_abort_recovery) {
1689 CWARN("recovery is aborted, evict exports in recovery\n");
1690 /** evict exports which didn't finish recovery yet */
1691 class_disconnect_stale_exports(obd, exp_finished);
1693 } else if (obd->obd_recovery_expired) {
1694 obd->obd_recovery_expired = 0;
1695 /** If some clients died being recovered, evict them */
1697 "recovery is timed out, evict stale exports\n");
1698 /** evict cexports with no replay in queue, they are stalled */
1699 class_disconnect_stale_exports(obd, health_check);
1700 /** continue with VBR */
1701 cfs_spin_lock(&obd->obd_dev_lock);
1702 obd->obd_version_recov = 1;
1703 cfs_spin_unlock(&obd->obd_dev_lock);
1705 * reset timer, recovery will proceed with versions now,
1706 * timeout is set just to handle reconnection delays
1708 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1709 /** Wait for recovery events again, after evicting bad clients */
1715 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1717 struct ptlrpc_request *req = NULL;
1720 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1721 obd->obd_next_recovery_transno);
1723 if (target_recovery_overseer(obd, check_for_next_transno,
1724 exp_req_replay_healthy)) {
1725 abort_req_replay_queue(obd);
1726 abort_lock_replay_queue(obd);
1729 cfs_spin_lock(&obd->obd_recovery_task_lock);
1730 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1731 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1732 struct ptlrpc_request, rq_list);
1733 cfs_list_del_init(&req->rq_list);
1734 obd->obd_requests_queued_for_recovery--;
1735 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1737 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1738 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1739 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1740 /** evict exports failed VBR */
1741 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1746 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1748 struct ptlrpc_request *req = NULL;
1750 CDEBUG(D_HA, "Waiting for lock\n");
1751 if (target_recovery_overseer(obd, check_for_next_lock,
1752 exp_lock_replay_healthy))
1753 abort_lock_replay_queue(obd);
1755 cfs_spin_lock(&obd->obd_recovery_task_lock);
1756 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1757 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1758 struct ptlrpc_request, rq_list);
1759 cfs_list_del_init(&req->rq_list);
1760 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1762 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1763 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1764 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1765 /** evict exports failed VBR */
1766 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1771 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1773 struct ptlrpc_request *req = NULL;
1775 cfs_spin_lock(&obd->obd_recovery_task_lock);
1776 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1777 req = cfs_list_entry(obd->obd_final_req_queue.next,
1778 struct ptlrpc_request, rq_list);
1779 cfs_list_del_init(&req->rq_list);
1780 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1781 if (req->rq_export->exp_in_recovery) {
1782 cfs_spin_lock(&req->rq_export->exp_lock);
1783 req->rq_export->exp_in_recovery = 0;
1784 cfs_spin_unlock(&req->rq_export->exp_lock);
1787 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1792 static int handle_recovery_req(struct ptlrpc_thread *thread,
1793 struct ptlrpc_request *req,
1794 svc_handler_t handler)
1800 * export can be evicted during recovery, no need to handle replays for
1801 * it after that, discard such request silently
1803 if (req->rq_export->exp_disconnected)
1804 GOTO(reqcopy_put, rc = 0);
1806 rc = lu_context_init(&req->rq_recov_session, LCT_SESSION);
1808 CERROR("Failure to initialize session: %d\n", rc);
1809 GOTO(reqcopy_put, rc);
1812 req->rq_recov_session.lc_thread = thread;
1813 lu_context_enter(&req->rq_recov_session);
1814 req->rq_svc_thread = thread;
1815 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1817 /* thread context */
1818 lu_context_enter(&thread->t_env->le_ctx);
1820 lu_context_exit(&thread->t_env->le_ctx);
1822 lu_context_exit(&req->rq_recov_session);
1823 lu_context_fini(&req->rq_recov_session);
1824 /* don't reset timer for final stage */
1825 if (!exp_finished(req->rq_export)) {
1826 int to = obd_timeout;
1829 * Add request timeout to the recovery time so next request from
1830 * this client may come in recovery time
1833 struct ptlrpc_service *svc = req->rq_rqbd->rqbd_service;
1834 /* If the server sent early reply for this request,
1835 * the client will recalculate the timeout according to
1836 * current server estimate service time, so we will
1837 * use the maxium timeout here for waiting the client
1838 * sending the next req */
1839 to = max((int)at_est2timeout(
1840 at_get(&svc->srv_at_estimate)),
1841 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1842 /* Add net_latency (see ptlrpc_replay_req) */
1843 to += lustre_msg_get_service_time(req->rq_reqmsg);
1845 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1851 static int target_recovery_thread(void *arg)
1853 struct lu_target *lut = arg;
1854 struct obd_device *obd = lut->lut_obd;
1855 struct ptlrpc_request *req;
1856 struct target_recovery_data *trd = &obd->obd_recovery_data;
1857 unsigned long delta;
1858 unsigned long flags;
1860 struct ptlrpc_thread *thread = NULL;
1864 cfs_daemonize_ctxt("tgt_recov");
1866 SIGNAL_MASK_LOCK(current, flags);
1867 sigfillset(¤t->blocked);
1869 SIGNAL_MASK_UNLOCK(current, flags);
1871 OBD_ALLOC_PTR(thread);
1877 OBD_FREE_PTR(thread);
1881 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD);
1883 OBD_FREE_PTR(thread);
1888 thread->t_env = env;
1889 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1890 env->le_ctx.lc_thread = thread;
1891 thread->t_data = NULL;
1892 thread->t_watchdog = NULL;
1894 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
1896 trd->trd_processing_task = cfs_curproc_pid();
1898 cfs_spin_lock(&obd->obd_dev_lock);
1899 obd->obd_recovering = 1;
1900 cfs_spin_unlock(&obd->obd_dev_lock);
1901 cfs_complete(&trd->trd_starting);
1903 /* first of all, we have to know the first transno to replay */
1904 if (target_recovery_overseer(obd, check_for_clients,
1905 exp_connect_healthy)) {
1906 abort_req_replay_queue(obd);
1907 abort_lock_replay_queue(obd);
1910 /* next stage: replay requests */
1912 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
1913 cfs_atomic_read(&obd->obd_req_replay_clients),
1914 obd->obd_next_recovery_transno);
1915 while ((req = target_next_replay_req(obd))) {
1916 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1917 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
1918 lustre_msg_get_transno(req->rq_reqmsg),
1919 libcfs_nid2str(req->rq_peer.nid));
1920 handle_recovery_req(thread, req,
1921 trd->trd_recovery_handler);
1923 * bz18031: increase next_recovery_transno before
1924 * target_request_copy_put() will drop exp_rpc reference
1926 cfs_spin_lock(&obd->obd_recovery_task_lock);
1927 obd->obd_next_recovery_transno++;
1928 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1929 target_exp_dequeue_req_replay(req);
1930 target_request_copy_put(req);
1931 obd->obd_replayed_requests++;
1935 * The second stage: replay locks
1937 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
1938 cfs_atomic_read(&obd->obd_lock_replay_clients));
1939 while ((req = target_next_replay_lock(obd))) {
1940 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1941 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
1942 libcfs_nid2str(req->rq_peer.nid));
1943 handle_recovery_req(thread, req,
1944 trd->trd_recovery_handler);
1945 target_request_copy_put(req);
1946 obd->obd_replayed_locks++;
1950 * The third stage: reply on final pings, at this moment all clients
1951 * must have request in final queue
1953 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
1954 /** Update server last boot epoch */
1955 lut_boot_epoch_update(lut);
1956 /* We drop recoverying flag to forward all new requests
1957 * to regular mds_handle() since now */
1958 cfs_spin_lock(&obd->obd_dev_lock);
1959 obd->obd_recovering = obd->obd_abort_recovery = 0;
1960 cfs_spin_unlock(&obd->obd_dev_lock);
1961 cfs_spin_lock(&obd->obd_recovery_task_lock);
1962 target_cancel_recovery_timer(obd);
1963 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1964 while ((req = target_next_final_ping(obd))) {
1965 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1966 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1967 libcfs_nid2str(req->rq_peer.nid));
1968 handle_recovery_req(thread, req,
1969 trd->trd_recovery_handler);
1970 target_request_copy_put(req);
1973 delta = (jiffies - delta) / CFS_HZ;
1974 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
1975 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
1976 if (delta > OBD_RECOVERY_TIME_SOFT) {
1977 CWARN("too long recovery - read logs\n");
1978 libcfs_debug_dumplog();
1981 target_finish_recovery(obd);
1983 lu_context_fini(&env->le_ctx);
1984 trd->trd_processing_task = 0;
1985 cfs_complete(&trd->trd_finishing);
1987 OBD_FREE_PTR(thread);
1992 static int target_start_recovery_thread(struct lu_target *lut,
1993 svc_handler_t handler)
1995 struct obd_device *obd = lut->lut_obd;
1997 struct target_recovery_data *trd = &obd->obd_recovery_data;
1999 memset(trd, 0, sizeof(*trd));
2000 cfs_init_completion(&trd->trd_starting);
2001 cfs_init_completion(&trd->trd_finishing);
2002 trd->trd_recovery_handler = handler;
2004 if (cfs_create_thread(target_recovery_thread, lut, 0) > 0) {
2005 cfs_wait_for_completion(&trd->trd_starting);
2006 LASSERT(obd->obd_recovering != 0);
2013 void target_stop_recovery_thread(struct obd_device *obd)
2015 if (obd->obd_recovery_data.trd_processing_task > 0) {
2016 struct target_recovery_data *trd = &obd->obd_recovery_data;
2017 /** recovery can be done but postrecovery is not yet */
2018 cfs_spin_lock(&obd->obd_dev_lock);
2019 if (obd->obd_recovering) {
2020 CERROR("%s: Aborting recovery\n", obd->obd_name);
2021 obd->obd_abort_recovery = 1;
2022 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2024 cfs_spin_unlock(&obd->obd_dev_lock);
2025 cfs_wait_for_completion(&trd->trd_finishing);
2029 void target_recovery_fini(struct obd_device *obd)
2031 class_disconnect_exports(obd);
2032 target_stop_recovery_thread(obd);
2033 target_cleanup_recovery(obd);
2035 EXPORT_SYMBOL(target_recovery_fini);
2037 static void target_recovery_expired(unsigned long castmeharder)
2039 struct obd_device *obd = (struct obd_device *)castmeharder;
2040 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2041 " after %lds (%d clients connected)\n",
2042 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2043 cfs_time_current_sec()- obd->obd_recovery_start,
2044 cfs_atomic_read(&obd->obd_connected_clients));
2046 obd->obd_recovery_expired = 1;
2047 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2050 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2052 struct obd_device *obd = lut->lut_obd;
2053 if (obd->obd_max_recoverable_clients == 0) {
2054 /** Update server last boot epoch */
2055 lut_boot_epoch_update(lut);
2059 CWARN("RECOVERY: service %s, %d recoverable clients, "
2060 "last_transno "LPU64"\n", obd->obd_name,
2061 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2062 LASSERT(obd->obd_stopping == 0);
2063 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2064 obd->obd_recovery_start = 0;
2065 obd->obd_recovery_end = 0;
2067 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2068 target_start_recovery_thread(lut, handler);
2070 EXPORT_SYMBOL(target_recovery_init);
2074 static int target_process_req_flags(struct obd_device *obd,
2075 struct ptlrpc_request *req)
2077 struct obd_export *exp = req->rq_export;
2078 LASSERT(exp != NULL);
2079 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2080 /* client declares he's ready to replay locks */
2081 cfs_spin_lock(&exp->exp_lock);
2082 if (exp->exp_req_replay_needed) {
2083 exp->exp_req_replay_needed = 0;
2084 cfs_spin_unlock(&exp->exp_lock);
2086 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2087 cfs_atomic_dec(&obd->obd_req_replay_clients);
2089 cfs_spin_unlock(&exp->exp_lock);
2092 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2093 /* client declares he's ready to complete recovery
2094 * so, we put the request on th final queue */
2095 cfs_spin_lock(&exp->exp_lock);
2096 if (exp->exp_lock_replay_needed) {
2097 exp->exp_lock_replay_needed = 0;
2098 cfs_spin_unlock(&exp->exp_lock);
2100 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2101 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2103 cfs_spin_unlock(&exp->exp_lock);
2109 int target_queue_recovery_request(struct ptlrpc_request *req,
2110 struct obd_device *obd)
2114 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2117 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
2118 /* Processing the queue right now, don't re-add. */
2122 target_process_req_flags(obd, req);
2124 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2125 /* client declares he's ready to complete recovery
2126 * so, we put the request on th final queue */
2127 target_request_copy_get(req);
2128 DEBUG_REQ(D_HA, req, "queue final req");
2129 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2130 cfs_spin_lock(&obd->obd_recovery_task_lock);
2131 if (obd->obd_recovering) {
2132 cfs_list_add_tail(&req->rq_list,
2133 &obd->obd_final_req_queue);
2135 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2136 target_request_copy_put(req);
2137 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2139 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2142 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2143 /* client declares he's ready to replay locks */
2144 target_request_copy_get(req);
2145 DEBUG_REQ(D_HA, req, "queue lock replay req");
2146 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2147 cfs_spin_lock(&obd->obd_recovery_task_lock);
2148 LASSERT(obd->obd_recovering);
2149 /* usually due to recovery abort */
2150 if (!req->rq_export->exp_in_recovery) {
2151 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2152 target_request_copy_put(req);
2155 LASSERT(req->rq_export->exp_lock_replay_needed);
2156 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2157 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2161 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2162 * (i.e. buflens etc are in my own byte order), but type-dependent
2163 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2166 CFS_INIT_LIST_HEAD(&req->rq_list);
2167 DEBUG_REQ(D_HA, req, "not queueing");
2171 /* If we're processing the queue, we want don't want to queue this
2174 * Also, if this request has a transno less than the one we're waiting
2175 * for, we should process it now. It could (and currently always will)
2176 * be an open request for a descriptor that was opened some time ago.
2178 * Also, a resent, replayed request that has already been
2179 * handled will pass through here and be processed immediately.
2181 CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying\n",
2182 obd->obd_next_recovery_transno, transno);
2183 cfs_spin_lock(&obd->obd_recovery_task_lock);
2184 if (transno < obd->obd_next_recovery_transno) {
2185 /* Processing the queue right now, don't re-add. */
2186 LASSERT(cfs_list_empty(&req->rq_list));
2187 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2190 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2192 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2195 target_request_copy_get(req);
2196 if (!req->rq_export->exp_in_recovery) {
2197 target_request_copy_put(req);
2200 LASSERT(req->rq_export->exp_req_replay_needed);
2202 if (target_exp_enqueue_req_replay(req)) {
2203 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2204 target_request_copy_put(req);
2209 cfs_spin_lock(&obd->obd_recovery_task_lock);
2210 LASSERT(obd->obd_recovering);
2211 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2212 struct ptlrpc_request *reqiter =
2213 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2215 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2216 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2221 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2223 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2224 "has been claimed by another client");
2225 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2226 target_exp_dequeue_req_replay(req);
2227 target_request_copy_put(req);
2233 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2235 obd->obd_requests_queued_for_recovery++;
2236 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2237 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2242 * Packs current SLV and Limit into \a req.
2244 int target_pack_pool_reply(struct ptlrpc_request *req)
2246 struct obd_device *obd;
2250 * Check that we still have all structures alive as this may
2251 * be some late rpc in shutdown time.
2253 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2254 !exp_connect_lru_resize(req->rq_export))) {
2255 lustre_msg_set_slv(req->rq_repmsg, 0);
2256 lustre_msg_set_limit(req->rq_repmsg, 0);
2261 * OBD is alive here as export is alive, which we checked above.
2263 obd = req->rq_export->exp_obd;
2265 cfs_read_lock(&obd->obd_pool_lock);
2266 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2267 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2268 cfs_read_unlock(&obd->obd_pool_lock);
2273 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2275 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2276 DEBUG_REQ(D_ERROR, req, "dropping reply");
2281 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2282 req->rq_status = rc;
2283 return (ptlrpc_send_error(req, 1));
2285 DEBUG_REQ(D_NET, req, "sending reply");
2288 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2291 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2294 struct ptlrpc_reply_state *rs;
2295 struct obd_export *exp;
2296 struct ptlrpc_service *svc;
2299 if (req->rq_no_reply) {
2304 svc = req->rq_rqbd->rqbd_service;
2305 rs = req->rq_reply_state;
2306 if (rs == NULL || !rs->rs_difficult) {
2308 target_send_reply_msg (req, rc, fail_id);
2313 /* must be an export if locks saved */
2314 LASSERT (req->rq_export != NULL);
2315 /* req/reply consistent */
2316 LASSERT (rs->rs_service == svc);
2319 LASSERT (!rs->rs_scheduled);
2320 LASSERT (!rs->rs_scheduled_ever);
2321 LASSERT (!rs->rs_handled);
2322 LASSERT (!rs->rs_on_net);
2323 LASSERT (rs->rs_export == NULL);
2324 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2325 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2327 exp = class_export_get (req->rq_export);
2329 /* disable reply scheduling while I'm setting up */
2330 rs->rs_scheduled = 1;
2332 rs->rs_xid = req->rq_xid;
2333 rs->rs_transno = req->rq_transno;
2334 rs->rs_export = exp;
2335 rs->rs_opc = lustre_msg_get_opc(rs->rs_msg);
2337 cfs_spin_lock(&exp->exp_uncommitted_replies_lock);
2338 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2339 rs->rs_transno, exp->exp_last_committed);
2340 if (rs->rs_transno > exp->exp_last_committed) {
2341 /* not committed already */
2342 cfs_list_add_tail(&rs->rs_obd_list,
2343 &exp->exp_uncommitted_replies);
2345 cfs_spin_unlock (&exp->exp_uncommitted_replies_lock);
2347 cfs_spin_lock(&exp->exp_lock);
2348 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2349 cfs_spin_unlock(&exp->exp_lock);
2351 netrc = target_send_reply_msg (req, rc, fail_id);
2353 cfs_spin_lock(&svc->srv_rs_lock);
2355 cfs_atomic_inc(&svc->srv_n_difficult_replies);
2358 /* error sending: reply is off the net. Also we need +1
2359 * reply ref until ptlrpc_handle_rs() is done
2360 * with the reply state (if the send was successful, there
2361 * would have been +1 ref for the net, which
2362 * reply_out_callback leaves alone) */
2364 ptlrpc_rs_addref(rs);
2367 cfs_spin_lock(&rs->rs_lock);
2368 if (rs->rs_transno <= exp->exp_last_committed ||
2369 (!rs->rs_on_net && !rs->rs_no_ack) ||
2370 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2371 cfs_list_empty(&rs->rs_obd_list)) {
2372 CDEBUG(D_HA, "Schedule reply immediately\n");
2373 ptlrpc_dispatch_difficult_reply(rs);
2375 cfs_list_add (&rs->rs_list, &svc->srv_active_replies);
2376 rs->rs_scheduled = 0; /* allow notifier to schedule */
2378 cfs_spin_unlock(&rs->rs_lock);
2379 cfs_spin_unlock(&svc->srv_rs_lock);
2383 int target_handle_ping(struct ptlrpc_request *req)
2385 obd_ping(req->rq_export);
2386 return req_capsule_server_pack(&req->rq_pill);
2389 void target_committed_to_req(struct ptlrpc_request *req)
2391 struct obd_export *exp = req->rq_export;
2393 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2394 lustre_msg_set_last_committed(req->rq_repmsg,
2395 exp->exp_last_committed);
2397 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2398 "%d)", exp->exp_obd->obd_no_transno,
2399 req->rq_repmsg == NULL);
2401 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2402 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2404 EXPORT_SYMBOL(target_committed_to_req);
2406 int target_handle_qc_callback(struct ptlrpc_request *req)
2408 struct obd_quotactl *oqctl;
2409 struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
2411 oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
2412 if (oqctl == NULL) {
2413 CERROR("Can't unpack obd_quotactl\n");
2417 cli->cl_qchk_stat = oqctl->qc_stat;
2422 #ifdef HAVE_QUOTA_SUPPORT
2423 int target_handle_dqacq_callback(struct ptlrpc_request *req)
2426 struct obd_device *obd = req->rq_export->exp_obd;
2427 struct obd_device *master_obd = NULL, *lov_obd = NULL;
2428 struct obd_device_target *obt;
2429 struct lustre_quota_ctxt *qctxt;
2430 struct qunit_data *qdata = NULL;
2434 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ))
2437 rc = req_capsule_server_pack(&req->rq_pill);
2439 CERROR("packing reply failed!: rc = %d\n", rc);
2443 LASSERT(req->rq_export);
2445 qdata = quota_get_qdata(req, QUOTA_REQUEST, QUOTA_EXPORT);
2446 if (IS_ERR(qdata)) {
2447 rc = PTR_ERR(qdata);
2448 CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc);
2449 req->rq_status = rc;
2453 /* we use the observer */
2454 if (obd_pin_observer(obd, &lov_obd) ||
2455 obd_pin_observer(lov_obd, &master_obd)) {
2456 CERROR("Can't find the observer, it is recovering\n");
2457 req->rq_status = -EAGAIN;
2461 obt = &master_obd->u.obt;
2462 qctxt = &obt->obt_qctxt;
2464 if (!qctxt->lqc_setup || !qctxt->lqc_valid) {
2465 /* quota_type has not been processed yet, return EAGAIN
2466 * until we know whether or not quotas are supposed to
2468 CDEBUG(D_QUOTA, "quota_type not processed yet, return "
2470 req->rq_status = -EAGAIN;
2474 cfs_down_read(&obt->obt_rwsem);
2475 if (qctxt->lqc_lqs_hash == NULL) {
2476 cfs_up_read(&obt->obt_rwsem);
2477 /* quota_type has not been processed yet, return EAGAIN
2478 * until we know whether or not quotas are supposed to
2480 CDEBUG(D_QUOTA, "quota_ctxt is not ready yet, return "
2482 req->rq_status = -EAGAIN;
2486 LASSERT(qctxt->lqc_handler);
2487 rc = qctxt->lqc_handler(master_obd, qdata,
2488 lustre_msg_get_opc(req->rq_reqmsg));
2489 cfs_up_read(&obt->obt_rwsem);
2490 if (rc && rc != -EDQUOT)
2491 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
2492 "dqacq/dqrel failed! (rc:%d)\n", rc);
2493 req->rq_status = rc;
2495 rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT);
2497 CERROR("Can't pack qunit_data(rc: %d)\n", rc);
2501 /* Block the quota req. b=14840 */
2502 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout);
2507 obd_unpin_observer(lov_obd);
2509 obd_unpin_observer(obd);
2511 rc = ptlrpc_reply(req);
2515 #endif /* !__KERNEL__ */
2517 #endif /* HAVE_QUOTA_SUPPORT */
2519 ldlm_mode_t lck_compat_array[] = {
2520 [LCK_EX] LCK_COMPAT_EX,
2521 [LCK_PW] LCK_COMPAT_PW,
2522 [LCK_PR] LCK_COMPAT_PR,
2523 [LCK_CW] LCK_COMPAT_CW,
2524 [LCK_CR] LCK_COMPAT_CR,
2525 [LCK_NL] LCK_COMPAT_NL,
2526 [LCK_GROUP] LCK_COMPAT_GROUP,
2527 [LCK_COS] LCK_COMPAT_COS,
2531 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2532 * not escape to the user level.
2534 int ldlm_error2errno(ldlm_error_t error)
2542 case ELDLM_LOCK_CHANGED:
2545 case ELDLM_LOCK_ABORTED:
2548 case ELDLM_LOCK_REPLACED:
2551 case ELDLM_NO_LOCK_DATA:
2554 case ELDLM_NAMESPACE_EXISTS:
2557 case ELDLM_BAD_NAMESPACE:
2561 if (((int)error) < 0) /* cast to signed type */
2562 result = error; /* as ldlm_error_t can be unsigned */
2564 CERROR("Invalid DLM result code: %d\n", error);
2570 EXPORT_SYMBOL(ldlm_error2errno);
2573 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2575 ldlm_error_t ldlm_errno2error(int err_no)
2584 error = ELDLM_LOCK_CHANGED;
2587 error = ELDLM_LOCK_ABORTED;
2590 error = ELDLM_LOCK_REPLACED;
2593 error = ELDLM_NO_LOCK_DATA;
2596 error = ELDLM_NAMESPACE_EXISTS;
2599 error = ELDLM_BAD_NAMESPACE;
2606 EXPORT_SYMBOL(ldlm_errno2error);
2608 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2609 void ldlm_dump_export_locks(struct obd_export *exp)
2611 cfs_spin_lock(&exp->exp_locks_list_guard);
2612 if (!cfs_list_empty(&exp->exp_locks_list)) {
2613 struct ldlm_lock *lock;
2615 CERROR("dumping locks for export %p,"
2616 "ignore if the unmount doesn't hang\n", exp);
2617 cfs_list_for_each_entry(lock, &exp->exp_locks_list, l_exp_refs_link)
2618 ldlm_lock_dump(D_ERROR, lock, 0);
2620 cfs_spin_unlock(&exp->exp_locks_list_guard);
2624 static int target_bulk_timeout(void *data)
2627 /* We don't fail the connection here, because having the export
2628 * killed makes the (vital) call to commitrw very sad.
2633 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2635 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2638 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2639 struct l_wait_info *lwi)
2641 struct ptlrpc_request *req = desc->bd_req;
2645 /* Check if there is eviction in progress, and if so, wait for
2647 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2648 *lwi = LWI_INTR(NULL, NULL);
2649 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2650 !cfs_atomic_read(&exp->exp_obd->
2651 obd_evict_inprogress),
2655 /* Check if client was evicted or tried to reconnect already */
2656 if (exp->exp_failed || exp->exp_abort_active_req) {
2659 if (desc->bd_type == BULK_PUT_SINK)
2660 rc = sptlrpc_svc_wrap_bulk(req, desc);
2662 rc = ptlrpc_start_bulk_transfer(desc);
2665 if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2666 ptlrpc_abort_bulk(desc);
2667 } else if (rc == 0) {
2668 time_t start = cfs_time_current_sec();
2670 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2671 cfs_duration_t timeout = timeoutl <= 0 ?
2672 CFS_TICK : cfs_time_seconds(timeoutl);
2673 *lwi = LWI_TIMEOUT_INTERVAL(timeout,
2674 cfs_time_seconds(1),
2675 target_bulk_timeout,
2677 rc = l_wait_event(desc->bd_waitq,
2678 !ptlrpc_server_bulk_active(desc) ||
2680 exp->exp_abort_active_req,
2682 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2683 /* Wait again if we changed deadline */
2684 } while ((rc == -ETIMEDOUT) &&
2685 (req->rq_deadline > cfs_time_current_sec()));
2687 if (rc == -ETIMEDOUT) {
2688 DEBUG_REQ(D_ERROR, req,
2689 "timeout on bulk %s after %ld%+lds",
2691 req->rq_deadline - start,
2692 cfs_time_current_sec() -
2694 ptlrpc_abort_bulk(desc);
2695 } else if (exp->exp_failed) {
2696 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2699 ptlrpc_abort_bulk(desc);
2700 } else if (exp->exp_abort_active_req) {
2701 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2703 /* we don't reply anyway */
2705 ptlrpc_abort_bulk(desc);
2706 } else if (!desc->bd_success ||
2707 desc->bd_nob_transferred != desc->bd_nob) {
2708 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2710 "truncated" : "network error on",
2712 desc->bd_nob_transferred,
2714 /* XXX should this be a different errno? */
2716 } else if (desc->bd_type == BULK_GET_SINK) {
2717 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2720 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2721 bulk2type(desc), rc);
2726 EXPORT_SYMBOL(target_bulk_io);