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)
623 if (exp->exp_connection && exp->exp_imp_reverse) {
624 struct lustre_handle *hdl;
625 hdl = &exp->exp_imp_reverse->imp_remote_handle;
626 /* Might be a re-connect after a partition. */
627 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
628 CWARN("%s: %s reconnecting\n", exp->exp_obd->obd_name,
630 conn->cookie = exp->exp_handle.h_cookie;
631 /* target_handle_connect() treats EALREADY and
632 * -EALREADY differently. EALREADY means we are
633 * doing a valid reconnect from the same client. */
636 CERROR("%s reconnecting from %s, "
637 "handle mismatch (ours "LPX64", theirs "
638 LPX64")\n", cluuid->uuid,
639 exp->exp_connection->c_remote_uuid.uuid,
640 hdl->cookie, conn->cookie);
641 memset(conn, 0, sizeof *conn);
642 /* target_handle_connect() treats EALREADY and
643 * -EALREADY differently. -EALREADY is an error
644 * (same UUID, different handle). */
649 conn->cookie = exp->exp_handle.h_cookie;
650 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
651 cluuid->uuid, exp, conn->cookie);
655 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
658 struct obd_export *exp = cb_data;
660 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
661 obd->obd_name, exp->exp_client_uuid.uuid);
663 cfs_spin_lock(&exp->exp_lock);
664 exp->exp_need_sync = 0;
665 cfs_spin_unlock(&exp->exp_lock);
666 class_export_cb_put(exp);
668 EXPORT_SYMBOL(target_client_add_cb);
672 check_and_start_recovery_timer(struct obd_device *obd,
673 struct ptlrpc_request *req, int new_client);
676 check_and_start_recovery_timer(struct obd_device *obd,
677 struct ptlrpc_request *req, int new_client)
682 int target_handle_connect(struct ptlrpc_request *req)
684 struct obd_device *target, *targref = NULL;
685 struct obd_export *export = NULL;
686 struct obd_import *revimp;
687 struct lustre_handle conn;
688 struct lustre_handle *tmp;
689 struct obd_uuid tgtuuid;
690 struct obd_uuid cluuid;
691 struct obd_uuid remote_uuid;
695 struct obd_connect_data *data, *tmpdata;
697 lnet_nid_t *client_nid = NULL;
700 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
702 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
704 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
705 GOTO(out, rc = -EINVAL);
708 obd_str2uuid(&tgtuuid, str);
709 target = class_uuid2obd(&tgtuuid);
711 target = class_name2obd(str);
713 if (!target || target->obd_stopping || !target->obd_set_up) {
714 LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available "
715 "for connect (%s)\n", str,
716 !target ? "no target" :
717 (target->obd_stopping ? "stopping" :
719 GOTO(out, rc = -ENODEV);
722 if (target->obd_no_conn) {
723 LCONSOLE_WARN("%s: temporarily refusing client connection "
724 "from %s\n", target->obd_name,
725 libcfs_nid2str(req->rq_peer.nid));
726 GOTO(out, rc = -EAGAIN);
729 /* Make sure the target isn't cleaned up while we're here. Yes,
730 there's still a race between the above check and our incref here.
731 Really, class_uuid2obd should take the ref. */
732 targref = class_incref(target, __FUNCTION__, cfs_current());
735 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
737 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
738 GOTO(out, rc = -EINVAL);
741 obd_str2uuid(&cluuid, str);
743 /* XXX extract a nettype and format accordingly */
744 switch (sizeof(lnet_nid_t)) {
745 /* NB the casts only avoid compiler warnings */
747 snprintf(remote_uuid.uuid, sizeof remote_uuid,
748 "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid);
751 snprintf(remote_uuid.uuid, sizeof remote_uuid,
752 "NET_%x_UUID", (__u32)req->rq_peer.nid);
758 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
760 GOTO(out, rc = -EPROTO);
764 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
766 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
768 GOTO(out, rc = -EPROTO);
770 rc = req_capsule_server_pack(&req->rq_pill);
774 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
776 DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) "
777 "libclient connection attempt");
778 GOTO(out, rc = -EPROTO);
779 } else if (data->ocd_version < LUSTRE_VERSION_CODE -
780 LUSTRE_VERSION_ALLOWED_OFFSET ||
781 data->ocd_version > LUSTRE_VERSION_CODE +
782 LUSTRE_VERSION_ALLOWED_OFFSET) {
783 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
784 "libclient connection attempt",
785 data->ocd_version < LUSTRE_VERSION_CODE ?
787 OBD_OCD_VERSION_MAJOR(data->ocd_version),
788 OBD_OCD_VERSION_MINOR(data->ocd_version),
789 OBD_OCD_VERSION_PATCH(data->ocd_version),
790 OBD_OCD_VERSION_FIX(data->ocd_version));
791 data = req_capsule_server_sized_get(&req->rq_pill,
793 offsetof(typeof(*data), ocd_version) +
794 sizeof(data->ocd_version));
796 data->ocd_connect_flags = OBD_CONNECT_VERSION;
797 data->ocd_version = LUSTRE_VERSION_CODE;
799 GOTO(out, rc = -EPROTO);
803 if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) &&
804 (data->ocd_connect_flags & OBD_CONNECT_MDS))
807 /* lctl gets a backstage, all-access pass. */
808 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
809 goto dont_check_exports;
811 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
815 /* we've found an export in the hash */
816 if (export->exp_connecting) { /* bug 9635, et. al. */
817 CWARN("%s: exp %p already connecting\n",
818 export->exp_obd->obd_name, export);
819 class_export_put(export);
822 } else if (mds_conn && export->exp_connection) {
823 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
824 /* mds reconnected after failover */
825 CWARN("%s: received MDS connection from NID %s,"
826 " removing former export from NID %s\n",
827 target->obd_name, libcfs_nid2str(req->rq_peer.nid),
828 libcfs_nid2str(export->exp_connection->c_peer.nid));
830 /* new mds connection from the same nid */
831 CWARN("%s: received new MDS connection from NID %s,"
832 " removing former export from same NID\n",
833 target->obd_name, libcfs_nid2str(req->rq_peer.nid));
834 class_fail_export(export);
835 class_export_put(export);
838 } else if (export->exp_connection != NULL &&
839 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
840 (lustre_msg_get_op_flags(req->rq_reqmsg) &
841 MSG_CONNECT_INITIAL)) {
842 /* in mds failover we have static uuid but nid can be
844 CWARN("%s: cookie %s seen on new NID %s when "
845 "existing NID %s is already connected\n",
846 target->obd_name, cluuid.uuid,
847 libcfs_nid2str(req->rq_peer.nid),
848 libcfs_nid2str(export->exp_connection->c_peer.nid));
850 class_export_put(export);
853 cfs_spin_lock(&export->exp_lock);
854 export->exp_connecting = 1;
855 cfs_spin_unlock(&export->exp_lock);
856 LASSERT(export->exp_obd == target);
858 rc = target_handle_reconnect(&conn, export, &cluuid);
861 /* If we found an export, we already unlocked. */
864 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
865 } else if (req->rq_export == NULL &&
866 cfs_atomic_read(&export->exp_rpc_count) > 0) {
867 CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
868 target->obd_name, cluuid.uuid,
869 libcfs_nid2str(req->rq_peer.nid),
870 export, cfs_atomic_read(&export->exp_refcount));
871 GOTO(out, rc = -EBUSY);
872 } else if (req->rq_export != NULL &&
873 (cfs_atomic_read(&export->exp_rpc_count) > 1)) {
874 /* the current connect rpc has increased exp_rpc_count */
875 CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
876 target->obd_name, cluuid.uuid,
877 libcfs_nid2str(req->rq_peer.nid),
878 export, cfs_atomic_read(&export->exp_rpc_count) - 1);
879 cfs_spin_lock(&export->exp_lock);
880 if (req->rq_export->exp_conn_cnt <
881 lustre_msg_get_conn_cnt(req->rq_reqmsg))
882 /* try to abort active requests */
883 req->rq_export->exp_abort_active_req = 1;
884 cfs_spin_unlock(&export->exp_lock);
885 GOTO(out, rc = -EBUSY);
886 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
887 CERROR("%s: NID %s (%s) reconnected with 1 conn_cnt; "
888 "cookies not random?\n", target->obd_name,
889 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid);
890 GOTO(out, rc = -EALREADY);
892 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
899 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
900 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
901 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
902 export, (long)cfs_time_current_sec(),
903 export ? (long)export->exp_last_request_time : 0);
905 /* If this is the first time a client connects, reset the recovery
907 if (rc == 0 && target->obd_recovering)
908 check_and_start_recovery_timer(target, req, export == NULL);
910 /* We want to handle EALREADY but *not* -EALREADY from
911 * target_handle_reconnect(), return reconnection state in a flag */
912 if (rc == EALREADY) {
913 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
919 /* Tell the client if we support replayable requests */
920 if (target->obd_replayable)
921 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
922 client_nid = &req->rq_peer.nid;
924 if (export == NULL) {
925 if (target->obd_recovering) {
928 t = cfs_timer_deadline(&target->obd_recovery_timer);
929 t = cfs_time_sub(t, cfs_time_current());
930 CERROR("%s: denying connection for new client %s (%s): "
931 "%d clients in recovery for "CFS_TIME_T"s\n",
933 libcfs_nid2str(req->rq_peer.nid), cluuid.uuid,
934 cfs_atomic_read(&target-> \
935 obd_lock_replay_clients),
936 cfs_duration_sec(t));
940 rc = obd_connect(req->rq_svc_thread->t_env,
941 &export, target, &cluuid, data,
944 conn.cookie = export->exp_handle.h_cookie;
945 /* LU-1092 reconnect put export refcount in the
946 * end, connect needs take one here too. */
947 class_export_get(export);
951 rc = obd_reconnect(req->rq_svc_thread->t_env,
952 export, target, &cluuid, data, client_nid);
954 /* prevous done via class_conn2export */
955 class_export_get(export);
960 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
961 data->ocd_instance = target->u.obt.obt_instance;
963 /* Return only the parts of obd_connect_data that we understand, so the
964 * client knows that we don't understand the rest. */
966 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
968 tmpdata = req_capsule_server_get(&req->rq_pill,
970 /* Don't use struct assignment here, because the client reply
971 * buffer may be smaller/larger than the local struct
972 * obd_connect_data. */
973 memcpy(tmpdata, data, min(tmpsize, size));
976 /* If all else goes well, this is our RPC return code. */
979 lustre_msg_set_handle(req->rq_repmsg, &conn);
981 /* If the client and the server are the same node, we will already
982 * have an export that really points to the client's DLM export,
983 * because we have a shared handles table.
985 * XXX this will go away when shaver stops sending the "connect" handle
986 * in the real "remote handle" field of the request --phik 24 Apr 2003
988 if (req->rq_export != NULL)
989 class_export_put(req->rq_export);
991 req->rq_export = export;
993 cfs_spin_lock(&export->exp_lock);
994 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
995 cfs_spin_unlock(&export->exp_lock);
996 CERROR("%s: %s already connected at higher conn_cnt: %d > %d\n",
997 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
998 export->exp_conn_cnt,
999 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1001 GOTO(out, rc = -EALREADY);
1003 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1004 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1005 export->exp_abort_active_req = 0;
1007 /* request from liblustre? Don't evict it for not pinging. */
1008 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1009 export->exp_libclient = 1;
1010 cfs_spin_unlock(&export->exp_lock);
1012 cfs_spin_lock(&target->obd_dev_lock);
1013 cfs_list_del_init(&export->exp_obd_chain_timed);
1014 cfs_spin_unlock(&target->obd_dev_lock);
1016 cfs_spin_unlock(&export->exp_lock);
1019 if (export->exp_connection != NULL) {
1020 /* Check to see if connection came from another NID */
1021 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1022 !cfs_hlist_unhashed(&export->exp_nid_hash))
1023 cfs_hash_del(export->exp_obd->obd_nid_hash,
1024 &export->exp_connection->c_peer.nid,
1025 &export->exp_nid_hash);
1027 ptlrpc_connection_put(export->exp_connection);
1030 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1033 if (cfs_hlist_unhashed(&export->exp_nid_hash)) {
1034 cfs_hash_add(export->exp_obd->obd_nid_hash,
1035 &export->exp_connection->c_peer.nid,
1036 &export->exp_nid_hash);
1039 class_disconnect->class_export_recovery_cleanup() race
1041 if (target->obd_recovering && !export->exp_in_recovery) {
1043 __u64 transno = data->ocd_transno;
1045 cfs_spin_lock(&export->exp_lock);
1046 export->exp_in_recovery = 1;
1047 export->exp_req_replay_needed = 1;
1048 export->exp_lock_replay_needed = 1;
1049 cfs_spin_unlock(&export->exp_lock);
1051 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1052 MSG_CONNECT_TRANSNO);
1053 if (has_transno && transno == 0)
1054 CWARN("Connect with zero transno!\n");
1056 if (has_transno && transno > 0 &&
1057 transno < target->obd_next_recovery_transno &&
1058 transno > target->obd_last_committed) {
1059 /* another way is to use cmpxchg() so it will be
1061 cfs_spin_lock(&target->obd_recovery_task_lock);
1062 if (transno < target->obd_next_recovery_transno)
1063 target->obd_next_recovery_transno = transno;
1064 cfs_spin_unlock(&target->obd_recovery_task_lock);
1067 cfs_atomic_inc(&target->obd_req_replay_clients);
1068 cfs_atomic_inc(&target->obd_lock_replay_clients);
1069 if (cfs_atomic_inc_return(&target->obd_connected_clients) ==
1070 target->obd_max_recoverable_clients)
1071 cfs_waitq_signal(&target->obd_next_transno_waitq);
1074 /* Tell the client we're in recovery, when client is involved in it. */
1075 if (target->obd_recovering)
1076 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1078 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
1081 if (export->exp_imp_reverse != NULL) {
1082 /* destroyed import can be still referenced in ctxt */
1083 obd_set_info_async(export, sizeof(KEY_REVIMP_UPD),
1084 KEY_REVIMP_UPD, 0, NULL, NULL);
1086 client_destroy_import(export->exp_imp_reverse);
1089 /* for the rest part, we return -ENOTCONN in case of errors
1090 * in order to let client initialize connection again.
1092 revimp = export->exp_imp_reverse = class_new_import(target);
1094 CERROR("fail to alloc new reverse import.\n");
1095 GOTO(out, rc = -ENOTCONN);
1098 revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
1099 revimp->imp_client = &export->exp_obd->obd_ldlm_client;
1100 revimp->imp_remote_handle = conn;
1101 revimp->imp_dlm_fake = 1;
1102 revimp->imp_state = LUSTRE_IMP_FULL;
1104 /* unknown versions will be caught in
1105 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
1106 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
1108 if ((export->exp_connect_flags & OBD_CONNECT_AT) &&
1109 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1110 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
1112 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
1114 if ((export->exp_connect_flags & OBD_CONNECT_FULL20) &&
1115 (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1))
1116 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
1118 revimp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
1120 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
1122 CERROR("Failed to get sec for reverse import: %d\n", rc);
1123 export->exp_imp_reverse = NULL;
1124 class_destroy_import(revimp);
1127 class_import_put(revimp);
1130 cfs_spin_lock(&export->exp_lock);
1131 export->exp_connecting = 0;
1132 cfs_spin_unlock(&export->exp_lock);
1134 class_export_put(export);
1137 class_decref(targref, __FUNCTION__, cfs_current());
1139 req->rq_status = rc;
1143 int target_handle_disconnect(struct ptlrpc_request *req)
1148 rc = req_capsule_server_pack(&req->rq_pill);
1152 /* keep the rq_export around so we can send the reply */
1153 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1158 void target_destroy_export(struct obd_export *exp)
1160 /* exports created from last_rcvd data, and "fake"
1161 exports created by lctl don't have an import */
1162 if (exp->exp_imp_reverse != NULL)
1163 client_destroy_import(exp->exp_imp_reverse);
1165 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1166 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1167 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1168 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1172 * Recovery functions
1174 static void target_request_copy_get(struct ptlrpc_request *req)
1176 class_export_rpc_get(req->rq_export);
1177 LASSERT(cfs_list_empty(&req->rq_list));
1178 CFS_INIT_LIST_HEAD(&req->rq_replay_list);
1180 /* increase refcount to keep request in queue */
1181 cfs_atomic_inc(&req->rq_refcount);
1182 /** let export know it has replays to be handled */
1183 cfs_atomic_inc(&req->rq_export->exp_replay_count);
1186 static void target_request_copy_put(struct ptlrpc_request *req)
1188 LASSERT(cfs_list_empty(&req->rq_replay_list));
1189 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1191 cfs_atomic_dec(&req->rq_export->exp_replay_count);
1192 class_export_rpc_put(req->rq_export);
1193 ptlrpc_server_drop_request(req);
1196 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1198 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1199 struct obd_export *exp = req->rq_export;
1200 struct ptlrpc_request *reqiter;
1205 cfs_spin_lock(&exp->exp_lock);
1206 cfs_list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1208 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1215 /* we expect it with RESENT and REPLAY flags */
1216 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1217 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1218 CERROR("invalid flags %x of resent replay\n",
1219 lustre_msg_get_flags(req->rq_reqmsg));
1221 cfs_list_add_tail(&req->rq_replay_list,
1222 &exp->exp_req_replay_queue);
1225 cfs_spin_unlock(&exp->exp_lock);
1229 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1231 LASSERT(!cfs_list_empty(&req->rq_replay_list));
1232 LASSERT(req->rq_export);
1234 cfs_spin_lock(&req->rq_export->exp_lock);
1235 cfs_list_del_init(&req->rq_replay_list);
1236 cfs_spin_unlock(&req->rq_export->exp_lock);
1240 static void target_finish_recovery(struct obd_device *obd)
1242 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1243 obd->obd_recovery_start);
1246 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1247 "%d recovered and %d %s evicted.\n", obd->obd_name,
1248 (int)elapsed_time / 60, (int)elapsed_time % 60,
1249 obd->obd_max_recoverable_clients,
1250 cfs_atomic_read(&obd->obd_connected_clients),
1251 obd->obd_stale_clients,
1252 obd->obd_stale_clients == 1 ? "was" : "were");
1254 ldlm_reprocess_all_ns(obd->obd_namespace);
1255 cfs_spin_lock(&obd->obd_recovery_task_lock);
1256 if (!cfs_list_empty(&obd->obd_req_replay_queue) ||
1257 !cfs_list_empty(&obd->obd_lock_replay_queue) ||
1258 !cfs_list_empty(&obd->obd_final_req_queue)) {
1259 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1261 cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1262 cfs_list_empty(&obd->obd_lock_replay_queue) ? \
1264 cfs_list_empty(&obd->obd_final_req_queue) ? \
1266 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1269 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1271 obd->obd_recovery_end = cfs_time_current_sec();
1273 /* when recovery finished, cleanup orphans on mds and ost */
1274 if (OBT(obd) && OBP(obd, postrecov)) {
1275 int rc = OBP(obd, postrecov)(obd);
1277 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1283 static void abort_req_replay_queue(struct obd_device *obd)
1285 struct ptlrpc_request *req, *n;
1286 cfs_list_t abort_list;
1288 CFS_INIT_LIST_HEAD(&abort_list);
1289 cfs_spin_lock(&obd->obd_recovery_task_lock);
1290 cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1291 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1292 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1293 DEBUG_REQ(D_WARNING, req, "aborted:");
1294 req->rq_status = -ENOTCONN;
1295 if (ptlrpc_error(req)) {
1296 DEBUG_REQ(D_ERROR, req,
1297 "failed abort_req_reply; skipping");
1299 target_exp_dequeue_req_replay(req);
1300 target_request_copy_put(req);
1304 static void abort_lock_replay_queue(struct obd_device *obd)
1306 struct ptlrpc_request *req, *n;
1307 cfs_list_t abort_list;
1309 CFS_INIT_LIST_HEAD(&abort_list);
1310 cfs_spin_lock(&obd->obd_recovery_task_lock);
1311 cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1312 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1313 cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){
1314 DEBUG_REQ(D_ERROR, req, "aborted:");
1315 req->rq_status = -ENOTCONN;
1316 if (ptlrpc_error(req)) {
1317 DEBUG_REQ(D_ERROR, req,
1318 "failed abort_lock_reply; skipping");
1320 target_request_copy_put(req);
1324 /* Called from a cleanup function if the device is being cleaned up
1325 forcefully. The exports should all have been disconnected already,
1326 the only thing left to do is
1327 - clear the recovery flags
1329 - free queued requests and replies, but don't send replies
1330 Because the obd_stopping flag is set, no new requests should be received.
1333 void target_cleanup_recovery(struct obd_device *obd)
1335 struct ptlrpc_request *req, *n;
1336 cfs_list_t clean_list;
1339 CFS_INIT_LIST_HEAD(&clean_list);
1340 cfs_spin_lock(&obd->obd_dev_lock);
1341 if (!obd->obd_recovering) {
1342 cfs_spin_unlock(&obd->obd_dev_lock);
1346 obd->obd_recovering = obd->obd_abort_recovery = 0;
1347 cfs_spin_unlock(&obd->obd_dev_lock);
1349 cfs_spin_lock(&obd->obd_recovery_task_lock);
1350 target_cancel_recovery_timer(obd);
1351 cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1352 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1354 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1355 LASSERT(req->rq_reply_state == 0);
1356 target_exp_dequeue_req_replay(req);
1357 target_request_copy_put(req);
1360 cfs_spin_lock(&obd->obd_recovery_task_lock);
1361 cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1362 cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list);
1363 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1365 cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){
1366 LASSERT(req->rq_reply_state == 0);
1367 target_request_copy_put(req);
1373 /* obd_recovery_task_lock should be held */
1374 void target_cancel_recovery_timer(struct obd_device *obd)
1376 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1377 cfs_timer_disarm(&obd->obd_recovery_timer);
1380 static void target_start_recovery_timer(struct obd_device *obd)
1382 if (obd->obd_recovery_start != 0)
1385 cfs_spin_lock(&obd->obd_dev_lock);
1386 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1387 cfs_spin_unlock(&obd->obd_dev_lock);
1391 LASSERT(obd->obd_recovery_timeout != 0);
1393 if (obd->obd_recovery_start != 0) {
1394 cfs_spin_unlock(&obd->obd_dev_lock);
1398 cfs_timer_arm(&obd->obd_recovery_timer,
1399 cfs_time_shift(obd->obd_recovery_timeout));
1400 obd->obd_recovery_start = cfs_time_current_sec();
1401 cfs_spin_unlock(&obd->obd_dev_lock);
1403 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1404 "or until %d client%s reconnect%s\n",
1406 obd->obd_recovery_timeout / 60,
1407 obd->obd_recovery_timeout % 60,
1408 obd->obd_max_recoverable_clients,
1409 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1410 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1414 * extend recovery window.
1416 * if @extend is true, extend recovery window to have @drt remaining at least;
1417 * otherwise, make sure the recovery timeout value is not less than @drt.
1419 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1423 cfs_duration_t left;
1426 cfs_spin_lock(&obd->obd_dev_lock);
1427 if (!obd->obd_recovering || obd->obd_abort_recovery) {
1428 cfs_spin_unlock(&obd->obd_dev_lock);
1432 LASSERT(obd->obd_recovery_start != 0);
1434 now = cfs_time_current_sec();
1435 to = obd->obd_recovery_timeout;
1436 end = obd->obd_recovery_start + to;
1437 left = cfs_time_sub(end, now);
1439 if (extend && (drt > left)) {
1441 } else if (!extend && (drt > to)) {
1443 /* reduce drt by already passed time */
1444 drt -= obd->obd_recovery_timeout - left;
1447 if (to > obd->obd_recovery_time_hard)
1448 to = obd->obd_recovery_time_hard;
1449 if (obd->obd_recovery_timeout < to) {
1450 obd->obd_recovery_timeout = to;
1451 cfs_timer_arm(&obd->obd_recovery_timer,
1452 cfs_time_shift(drt));
1454 cfs_spin_unlock(&obd->obd_dev_lock);
1456 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1457 obd->obd_name, (unsigned)drt);
1460 /* Reset the timer with each new client connection */
1462 * This timer is actually reconnect_timer, which is for making sure
1463 * the total recovery window is at least as big as my reconnect
1464 * attempt timing. So the initial recovery time_out will be set to
1465 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1466 * from client is bigger than this, then the recovery time_out will
1467 * be extended to make sure the client could be reconnected, in the
1468 * process, the timeout from the new client should be ignored.
1472 check_and_start_recovery_timer(struct obd_device *obd,
1473 struct ptlrpc_request *req,
1476 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1477 struct obd_device_target *obt = &obd->u.obt;
1478 struct lustre_sb_info *lsi;
1480 if (!new_client && service_time)
1481 /* Teach server about old server's estimates, as first guess
1482 * at how long new requests will take. */
1483 at_measured(&req->rq_rqbd->rqbd_service->srv_at_estimate,
1486 target_start_recovery_timer(obd);
1488 /* convert the service time to rpc timeout,
1489 * reuse service_time to limit stack usage */
1490 service_time = at_est2timeout(service_time);
1492 /* We expect other clients to timeout within service_time, then try
1493 * to reconnect, then try the failover server. The max delay between
1494 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL */
1495 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1497 LASSERT(obt->obt_magic == OBT_MAGIC);
1498 lsi = s2lsi(obt->obt_sb);
1499 if (!(lsi->lsi_flags | LSI_IR_CAPABLE))
1500 service_time += 2 * (CONNECTION_SWITCH_MAX +
1501 CONNECTION_SWITCH_INC);
1502 if (service_time > obd->obd_recovery_timeout && !new_client)
1503 extend_recovery_timer(obd, service_time, false);
1506 /** Health checking routines */
1507 static inline int exp_connect_healthy(struct obd_export *exp)
1509 return (exp->exp_in_recovery);
1512 /** if export done req_replay or has replay in queue */
1513 static inline int exp_req_replay_healthy(struct obd_export *exp)
1515 return (!exp->exp_req_replay_needed ||
1516 cfs_atomic_read(&exp->exp_replay_count) > 0);
1518 /** if export done lock_replay or has replay in queue */
1519 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1521 return (!exp->exp_lock_replay_needed ||
1522 cfs_atomic_read(&exp->exp_replay_count) > 0);
1525 static inline int exp_vbr_healthy(struct obd_export *exp)
1527 return (!exp->exp_vbr_failed);
1530 static inline int exp_finished(struct obd_export *exp)
1532 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1535 /** Checking routines for recovery */
1536 static int check_for_clients(struct obd_device *obd)
1538 unsigned int clnts = cfs_atomic_read(&obd->obd_connected_clients);
1540 if (obd->obd_abort_recovery || obd->obd_recovery_expired)
1542 LASSERT(clnts <= obd->obd_max_recoverable_clients);
1543 if (obd->obd_no_conn == 0 &&
1544 clnts + obd->obd_stale_clients == obd->obd_max_recoverable_clients)
1549 static int check_for_next_transno(struct obd_device *obd)
1551 struct ptlrpc_request *req = NULL;
1552 int wake_up = 0, connected, completed, queue_len;
1553 __u64 next_transno, req_transno;
1556 cfs_spin_lock(&obd->obd_recovery_task_lock);
1557 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1558 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1559 struct ptlrpc_request, rq_list);
1560 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1565 connected = cfs_atomic_read(&obd->obd_connected_clients);
1566 completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients);
1567 queue_len = obd->obd_requests_queued_for_recovery;
1568 next_transno = obd->obd_next_recovery_transno;
1570 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1571 "req_transno: "LPU64", next_transno: "LPU64"\n",
1572 obd->obd_max_recoverable_clients, connected, completed,
1573 queue_len, req_transno, next_transno);
1575 if (obd->obd_abort_recovery) {
1576 CDEBUG(D_HA, "waking for aborted recovery\n");
1578 } else if (obd->obd_recovery_expired) {
1579 CDEBUG(D_HA, "waking for expired recovery\n");
1581 } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) {
1582 CDEBUG(D_HA, "waking for completed recovery\n");
1584 } else if (req_transno == next_transno) {
1585 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1587 } else if (queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) {
1589 /** handle gaps occured due to lost reply or VBR */
1590 LASSERTF(req_transno >= next_transno,
1591 "req_transno: "LPU64", next_transno: "LPU64"\n",
1592 req_transno, next_transno);
1593 if (req_transno > obd->obd_last_committed &&
1594 !obd->obd_version_recov)
1597 "%s: waking for gap in transno, VBR is %s (skip: "
1598 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1599 ", last_committed: "LPD64")\n",
1600 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1601 next_transno, queue_len, completed, connected,
1602 req_transno, obd->obd_last_committed);
1603 obd->obd_next_recovery_transno = req_transno;
1605 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1606 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1607 " by fail_lock, waking up ("LPD64")\n", next_transno);
1608 obd->obd_next_recovery_transno = req_transno;
1611 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1615 static int check_for_next_lock(struct obd_device *obd)
1619 cfs_spin_lock(&obd->obd_recovery_task_lock);
1620 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1621 CDEBUG(D_HA, "waking for next lock\n");
1623 } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) {
1624 CDEBUG(D_HA, "waking for completed lock replay\n");
1626 } else if (obd->obd_abort_recovery) {
1627 CDEBUG(D_HA, "waking for aborted recovery\n");
1629 } else if (obd->obd_recovery_expired) {
1630 CDEBUG(D_HA, "waking for expired recovery\n");
1633 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1639 * wait for recovery events,
1640 * check its status with help of check_routine
1641 * evict dead clients via health_check
1643 static int target_recovery_overseer(struct obd_device *obd,
1644 int (*check_routine)(struct obd_device *),
1645 int (*health_check)(struct obd_export *))
1648 cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd));
1649 if (obd->obd_abort_recovery) {
1650 CWARN("recovery is aborted, evict exports in recovery\n");
1651 /** evict exports which didn't finish recovery yet */
1652 class_disconnect_stale_exports(obd, exp_finished);
1654 } else if (obd->obd_recovery_expired) {
1655 obd->obd_recovery_expired = 0;
1656 /** If some clients died being recovered, evict them */
1658 "recovery is timed out, evict stale exports\n");
1659 /** evict cexports with no replay in queue, they are stalled */
1660 class_disconnect_stale_exports(obd, health_check);
1661 /** continue with VBR */
1662 cfs_spin_lock(&obd->obd_dev_lock);
1663 obd->obd_version_recov = 1;
1664 cfs_spin_unlock(&obd->obd_dev_lock);
1666 * reset timer, recovery will proceed with versions now,
1667 * timeout is set just to handle reconnection delays
1669 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1670 /** Wait for recovery events again, after evicting bad clients */
1676 static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd)
1678 struct ptlrpc_request *req = NULL;
1681 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
1682 obd->obd_next_recovery_transno);
1684 if (target_recovery_overseer(obd, check_for_next_transno,
1685 exp_req_replay_healthy)) {
1686 abort_req_replay_queue(obd);
1687 abort_lock_replay_queue(obd);
1690 cfs_spin_lock(&obd->obd_recovery_task_lock);
1691 if (!cfs_list_empty(&obd->obd_req_replay_queue)) {
1692 req = cfs_list_entry(obd->obd_req_replay_queue.next,
1693 struct ptlrpc_request, rq_list);
1694 cfs_list_del_init(&req->rq_list);
1695 obd->obd_requests_queued_for_recovery--;
1696 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1698 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1699 LASSERT(cfs_list_empty(&obd->obd_req_replay_queue));
1700 LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0);
1701 /** evict exports failed VBR */
1702 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1707 static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd)
1709 struct ptlrpc_request *req = NULL;
1711 CDEBUG(D_HA, "Waiting for lock\n");
1712 if (target_recovery_overseer(obd, check_for_next_lock,
1713 exp_lock_replay_healthy))
1714 abort_lock_replay_queue(obd);
1716 cfs_spin_lock(&obd->obd_recovery_task_lock);
1717 if (!cfs_list_empty(&obd->obd_lock_replay_queue)) {
1718 req = cfs_list_entry(obd->obd_lock_replay_queue.next,
1719 struct ptlrpc_request, rq_list);
1720 cfs_list_del_init(&req->rq_list);
1721 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1723 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1724 LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue));
1725 LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0);
1726 /** evict exports failed VBR */
1727 class_disconnect_stale_exports(obd, exp_vbr_healthy);
1732 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
1734 struct ptlrpc_request *req = NULL;
1736 cfs_spin_lock(&obd->obd_recovery_task_lock);
1737 if (!cfs_list_empty(&obd->obd_final_req_queue)) {
1738 req = cfs_list_entry(obd->obd_final_req_queue.next,
1739 struct ptlrpc_request, rq_list);
1740 cfs_list_del_init(&req->rq_list);
1741 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1742 if (req->rq_export->exp_in_recovery) {
1743 cfs_spin_lock(&req->rq_export->exp_lock);
1744 req->rq_export->exp_in_recovery = 0;
1745 cfs_spin_unlock(&req->rq_export->exp_lock);
1748 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1753 static int handle_recovery_req(struct ptlrpc_thread *thread,
1754 struct ptlrpc_request *req,
1755 svc_handler_t handler)
1761 * export can be evicted during recovery, no need to handle replays for
1762 * it after that, discard such request silently
1764 if (req->rq_export->exp_disconnected)
1765 GOTO(reqcopy_put, rc = 0);
1767 rc = lu_context_init(&req->rq_recov_session, LCT_SESSION);
1769 CERROR("Failure to initialize session: %d\n", rc);
1770 GOTO(reqcopy_put, rc);
1773 req->rq_recov_session.lc_thread = thread;
1774 lu_context_enter(&req->rq_recov_session);
1775 req->rq_svc_thread = thread;
1776 req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session;
1778 /* thread context */
1779 lu_context_enter(&thread->t_env->le_ctx);
1781 lu_context_exit(&thread->t_env->le_ctx);
1783 lu_context_exit(&req->rq_recov_session);
1784 lu_context_fini(&req->rq_recov_session);
1785 /* don't reset timer for final stage */
1786 if (!exp_finished(req->rq_export)) {
1787 int to = obd_timeout;
1790 * Add request timeout to the recovery time so next request from
1791 * this client may come in recovery time
1794 struct ptlrpc_service *svc = req->rq_rqbd->rqbd_service;
1795 /* If the server sent early reply for this request,
1796 * the client will recalculate the timeout according to
1797 * current server estimate service time, so we will
1798 * use the maxium timeout here for waiting the client
1799 * sending the next req */
1800 to = max((int)at_est2timeout(
1801 at_get(&svc->srv_at_estimate)),
1802 (int)lustre_msg_get_timeout(req->rq_reqmsg));
1803 /* Add net_latency (see ptlrpc_replay_req) */
1804 to += lustre_msg_get_service_time(req->rq_reqmsg);
1806 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
1812 static int target_recovery_thread(void *arg)
1814 struct lu_target *lut = arg;
1815 struct obd_device *obd = lut->lut_obd;
1816 struct ptlrpc_request *req;
1817 struct target_recovery_data *trd = &obd->obd_recovery_data;
1818 unsigned long delta;
1819 unsigned long flags;
1821 struct ptlrpc_thread *thread = NULL;
1825 cfs_daemonize_ctxt("tgt_recov");
1827 SIGNAL_MASK_LOCK(current, flags);
1828 sigfillset(¤t->blocked);
1830 SIGNAL_MASK_UNLOCK(current, flags);
1832 OBD_ALLOC_PTR(thread);
1838 OBD_FREE_PTR(thread);
1842 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD);
1844 OBD_FREE_PTR(thread);
1849 thread->t_env = env;
1850 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
1851 env->le_ctx.lc_thread = thread;
1852 thread->t_data = NULL;
1853 thread->t_watchdog = NULL;
1855 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
1857 trd->trd_processing_task = cfs_curproc_pid();
1859 cfs_spin_lock(&obd->obd_dev_lock);
1860 obd->obd_recovering = 1;
1861 cfs_spin_unlock(&obd->obd_dev_lock);
1862 cfs_complete(&trd->trd_starting);
1864 /* first of all, we have to know the first transno to replay */
1865 if (target_recovery_overseer(obd, check_for_clients,
1866 exp_connect_healthy)) {
1867 abort_req_replay_queue(obd);
1868 abort_lock_replay_queue(obd);
1871 /* next stage: replay requests */
1873 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
1874 cfs_atomic_read(&obd->obd_req_replay_clients),
1875 obd->obd_next_recovery_transno);
1876 while ((req = target_next_replay_req(obd))) {
1877 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1878 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
1879 lustre_msg_get_transno(req->rq_reqmsg),
1880 libcfs_nid2str(req->rq_peer.nid));
1881 handle_recovery_req(thread, req,
1882 trd->trd_recovery_handler);
1884 * bz18031: increase next_recovery_transno before
1885 * target_request_copy_put() will drop exp_rpc reference
1887 cfs_spin_lock(&obd->obd_recovery_task_lock);
1888 obd->obd_next_recovery_transno++;
1889 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1890 target_exp_dequeue_req_replay(req);
1891 target_request_copy_put(req);
1892 obd->obd_replayed_requests++;
1896 * The second stage: replay locks
1898 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
1899 cfs_atomic_read(&obd->obd_lock_replay_clients));
1900 while ((req = target_next_replay_lock(obd))) {
1901 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1902 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
1903 libcfs_nid2str(req->rq_peer.nid));
1904 handle_recovery_req(thread, req,
1905 trd->trd_recovery_handler);
1906 target_request_copy_put(req);
1907 obd->obd_replayed_locks++;
1911 * The third stage: reply on final pings, at this moment all clients
1912 * must have request in final queue
1914 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
1915 /** Update server last boot epoch */
1916 lut_boot_epoch_update(lut);
1917 /* We drop recoverying flag to forward all new requests
1918 * to regular mds_handle() since now */
1919 cfs_spin_lock(&obd->obd_dev_lock);
1920 obd->obd_recovering = obd->obd_abort_recovery = 0;
1921 cfs_spin_unlock(&obd->obd_dev_lock);
1922 cfs_spin_lock(&obd->obd_recovery_task_lock);
1923 target_cancel_recovery_timer(obd);
1924 cfs_spin_unlock(&obd->obd_recovery_task_lock);
1925 while ((req = target_next_final_ping(obd))) {
1926 LASSERT(trd->trd_processing_task == cfs_curproc_pid());
1927 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
1928 libcfs_nid2str(req->rq_peer.nid));
1929 handle_recovery_req(thread, req,
1930 trd->trd_recovery_handler);
1931 target_request_copy_put(req);
1934 delta = (jiffies - delta) / CFS_HZ;
1935 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
1936 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
1937 if (delta > OBD_RECOVERY_TIME_SOFT) {
1938 CWARN("too long recovery - read logs\n");
1939 libcfs_debug_dumplog();
1942 target_finish_recovery(obd);
1944 lu_context_fini(&env->le_ctx);
1945 trd->trd_processing_task = 0;
1946 cfs_complete(&trd->trd_finishing);
1948 OBD_FREE_PTR(thread);
1953 static int target_start_recovery_thread(struct lu_target *lut,
1954 svc_handler_t handler)
1956 struct obd_device *obd = lut->lut_obd;
1958 struct target_recovery_data *trd = &obd->obd_recovery_data;
1960 memset(trd, 0, sizeof(*trd));
1961 cfs_init_completion(&trd->trd_starting);
1962 cfs_init_completion(&trd->trd_finishing);
1963 trd->trd_recovery_handler = handler;
1965 if (cfs_create_thread(target_recovery_thread, lut, 0) > 0) {
1966 cfs_wait_for_completion(&trd->trd_starting);
1967 LASSERT(obd->obd_recovering != 0);
1974 void target_stop_recovery_thread(struct obd_device *obd)
1976 if (obd->obd_recovery_data.trd_processing_task > 0) {
1977 struct target_recovery_data *trd = &obd->obd_recovery_data;
1978 /** recovery can be done but postrecovery is not yet */
1979 cfs_spin_lock(&obd->obd_dev_lock);
1980 if (obd->obd_recovering) {
1981 CERROR("%s: Aborting recovery\n", obd->obd_name);
1982 obd->obd_abort_recovery = 1;
1983 cfs_waitq_signal(&obd->obd_next_transno_waitq);
1985 cfs_spin_unlock(&obd->obd_dev_lock);
1986 cfs_wait_for_completion(&trd->trd_finishing);
1990 void target_recovery_fini(struct obd_device *obd)
1992 class_disconnect_exports(obd);
1993 target_stop_recovery_thread(obd);
1994 target_cleanup_recovery(obd);
1996 EXPORT_SYMBOL(target_recovery_fini);
1998 static void target_recovery_expired(unsigned long castmeharder)
2000 struct obd_device *obd = (struct obd_device *)castmeharder;
2001 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2002 " after %lds (%d clients connected)\n",
2003 obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients),
2004 cfs_time_current_sec()- obd->obd_recovery_start,
2005 cfs_atomic_read(&obd->obd_connected_clients));
2007 obd->obd_recovery_expired = 1;
2008 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2011 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2013 struct obd_device *obd = lut->lut_obd;
2014 if (obd->obd_max_recoverable_clients == 0) {
2015 /** Update server last boot epoch */
2016 lut_boot_epoch_update(lut);
2020 CWARN("RECOVERY: service %s, %d recoverable clients, "
2021 "last_transno "LPU64"\n", obd->obd_name,
2022 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2023 LASSERT(obd->obd_stopping == 0);
2024 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2025 obd->obd_recovery_start = 0;
2026 obd->obd_recovery_end = 0;
2028 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2029 target_start_recovery_thread(lut, handler);
2031 EXPORT_SYMBOL(target_recovery_init);
2035 static int target_process_req_flags(struct obd_device *obd,
2036 struct ptlrpc_request *req)
2038 struct obd_export *exp = req->rq_export;
2039 LASSERT(exp != NULL);
2040 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2041 /* client declares he's ready to replay locks */
2042 cfs_spin_lock(&exp->exp_lock);
2043 if (exp->exp_req_replay_needed) {
2044 exp->exp_req_replay_needed = 0;
2045 cfs_spin_unlock(&exp->exp_lock);
2047 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2048 cfs_atomic_dec(&obd->obd_req_replay_clients);
2050 cfs_spin_unlock(&exp->exp_lock);
2053 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2054 /* client declares he's ready to complete recovery
2055 * so, we put the request on th final queue */
2056 cfs_spin_lock(&exp->exp_lock);
2057 if (exp->exp_lock_replay_needed) {
2058 exp->exp_lock_replay_needed = 0;
2059 cfs_spin_unlock(&exp->exp_lock);
2061 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2062 cfs_atomic_dec(&obd->obd_lock_replay_clients);
2064 cfs_spin_unlock(&exp->exp_lock);
2070 int target_queue_recovery_request(struct ptlrpc_request *req,
2071 struct obd_device *obd)
2075 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2078 if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) {
2079 /* Processing the queue right now, don't re-add. */
2083 target_process_req_flags(obd, req);
2085 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2086 /* client declares he's ready to complete recovery
2087 * so, we put the request on th final queue */
2088 target_request_copy_get(req);
2089 DEBUG_REQ(D_HA, req, "queue final req");
2090 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2091 cfs_spin_lock(&obd->obd_recovery_task_lock);
2092 if (obd->obd_recovering) {
2093 cfs_list_add_tail(&req->rq_list,
2094 &obd->obd_final_req_queue);
2096 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2097 target_request_copy_put(req);
2098 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2100 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2103 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2104 /* client declares he's ready to replay locks */
2105 target_request_copy_get(req);
2106 DEBUG_REQ(D_HA, req, "queue lock replay req");
2107 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2108 cfs_spin_lock(&obd->obd_recovery_task_lock);
2109 LASSERT(obd->obd_recovering);
2110 /* usually due to recovery abort */
2111 if (!req->rq_export->exp_in_recovery) {
2112 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2113 target_request_copy_put(req);
2116 LASSERT(req->rq_export->exp_lock_replay_needed);
2117 cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2118 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2122 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2123 * (i.e. buflens etc are in my own byte order), but type-dependent
2124 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2127 CFS_INIT_LIST_HEAD(&req->rq_list);
2128 DEBUG_REQ(D_HA, req, "not queueing");
2132 /* If we're processing the queue, we want don't want to queue this
2135 * Also, if this request has a transno less than the one we're waiting
2136 * for, we should process it now. It could (and currently always will)
2137 * be an open request for a descriptor that was opened some time ago.
2139 * Also, a resent, replayed request that has already been
2140 * handled will pass through here and be processed immediately.
2142 CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying\n",
2143 obd->obd_next_recovery_transno, transno);
2144 cfs_spin_lock(&obd->obd_recovery_task_lock);
2145 if (transno < obd->obd_next_recovery_transno) {
2146 /* Processing the queue right now, don't re-add. */
2147 LASSERT(cfs_list_empty(&req->rq_list));
2148 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2151 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2153 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2156 target_request_copy_get(req);
2157 if (!req->rq_export->exp_in_recovery) {
2158 target_request_copy_put(req);
2161 LASSERT(req->rq_export->exp_req_replay_needed);
2163 if (target_exp_enqueue_req_replay(req)) {
2164 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2165 target_request_copy_put(req);
2170 cfs_spin_lock(&obd->obd_recovery_task_lock);
2171 LASSERT(obd->obd_recovering);
2172 cfs_list_for_each(tmp, &obd->obd_req_replay_queue) {
2173 struct ptlrpc_request *reqiter =
2174 cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
2176 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2177 cfs_list_add_tail(&req->rq_list, &reqiter->rq_list);
2182 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2184 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2185 "has been claimed by another client");
2186 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2187 target_exp_dequeue_req_replay(req);
2188 target_request_copy_put(req);
2194 cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2196 obd->obd_requests_queued_for_recovery++;
2197 cfs_spin_unlock(&obd->obd_recovery_task_lock);
2198 cfs_waitq_signal(&obd->obd_next_transno_waitq);
2203 * Packs current SLV and Limit into \a req.
2205 int target_pack_pool_reply(struct ptlrpc_request *req)
2207 struct obd_device *obd;
2211 * Check that we still have all structures alive as this may
2212 * be some late rpc in shutdown time.
2214 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2215 !exp_connect_lru_resize(req->rq_export))) {
2216 lustre_msg_set_slv(req->rq_repmsg, 0);
2217 lustre_msg_set_limit(req->rq_repmsg, 0);
2222 * OBD is alive here as export is alive, which we checked above.
2224 obd = req->rq_export->exp_obd;
2226 cfs_read_lock(&obd->obd_pool_lock);
2227 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2228 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2229 cfs_read_unlock(&obd->obd_pool_lock);
2234 int target_send_reply_msg(struct ptlrpc_request *req, int rc, int fail_id)
2236 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2237 DEBUG_REQ(D_ERROR, req, "dropping reply");
2242 DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
2243 req->rq_status = rc;
2244 return (ptlrpc_send_error(req, 1));
2246 DEBUG_REQ(D_NET, req, "sending reply");
2249 return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT));
2252 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2255 struct ptlrpc_reply_state *rs;
2256 struct obd_export *exp;
2257 struct ptlrpc_service *svc;
2260 if (req->rq_no_reply) {
2265 svc = req->rq_rqbd->rqbd_service;
2266 rs = req->rq_reply_state;
2267 if (rs == NULL || !rs->rs_difficult) {
2269 target_send_reply_msg (req, rc, fail_id);
2274 /* must be an export if locks saved */
2275 LASSERT (req->rq_export != NULL);
2276 /* req/reply consistent */
2277 LASSERT (rs->rs_service == svc);
2280 LASSERT (!rs->rs_scheduled);
2281 LASSERT (!rs->rs_scheduled_ever);
2282 LASSERT (!rs->rs_handled);
2283 LASSERT (!rs->rs_on_net);
2284 LASSERT (rs->rs_export == NULL);
2285 LASSERT (cfs_list_empty(&rs->rs_obd_list));
2286 LASSERT (cfs_list_empty(&rs->rs_exp_list));
2288 exp = class_export_get (req->rq_export);
2290 /* disable reply scheduling while I'm setting up */
2291 rs->rs_scheduled = 1;
2293 rs->rs_xid = req->rq_xid;
2294 rs->rs_transno = req->rq_transno;
2295 rs->rs_export = exp;
2296 rs->rs_opc = lustre_msg_get_opc(rs->rs_msg);
2298 cfs_spin_lock(&exp->exp_uncommitted_replies_lock);
2299 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2300 rs->rs_transno, exp->exp_last_committed);
2301 if (rs->rs_transno > exp->exp_last_committed) {
2302 /* not committed already */
2303 cfs_list_add_tail(&rs->rs_obd_list,
2304 &exp->exp_uncommitted_replies);
2306 cfs_spin_unlock (&exp->exp_uncommitted_replies_lock);
2308 cfs_spin_lock(&exp->exp_lock);
2309 cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2310 cfs_spin_unlock(&exp->exp_lock);
2312 netrc = target_send_reply_msg (req, rc, fail_id);
2314 cfs_spin_lock(&svc->srv_rs_lock);
2316 cfs_atomic_inc(&svc->srv_n_difficult_replies);
2319 /* error sending: reply is off the net. Also we need +1
2320 * reply ref until ptlrpc_handle_rs() is done
2321 * with the reply state (if the send was successful, there
2322 * would have been +1 ref for the net, which
2323 * reply_out_callback leaves alone) */
2325 ptlrpc_rs_addref(rs);
2328 cfs_spin_lock(&rs->rs_lock);
2329 if (rs->rs_transno <= exp->exp_last_committed ||
2330 (!rs->rs_on_net && !rs->rs_no_ack) ||
2331 cfs_list_empty(&rs->rs_exp_list) || /* completed already */
2332 cfs_list_empty(&rs->rs_obd_list)) {
2333 CDEBUG(D_HA, "Schedule reply immediately\n");
2334 ptlrpc_dispatch_difficult_reply(rs);
2336 cfs_list_add (&rs->rs_list, &svc->srv_active_replies);
2337 rs->rs_scheduled = 0; /* allow notifier to schedule */
2339 cfs_spin_unlock(&rs->rs_lock);
2340 cfs_spin_unlock(&svc->srv_rs_lock);
2344 int target_handle_ping(struct ptlrpc_request *req)
2346 obd_ping(req->rq_export);
2347 return req_capsule_server_pack(&req->rq_pill);
2350 void target_committed_to_req(struct ptlrpc_request *req)
2352 struct obd_export *exp = req->rq_export;
2354 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2355 lustre_msg_set_last_committed(req->rq_repmsg,
2356 exp->exp_last_committed);
2358 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2359 "%d)", exp->exp_obd->obd_no_transno,
2360 req->rq_repmsg == NULL);
2362 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2363 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2365 EXPORT_SYMBOL(target_committed_to_req);
2367 int target_handle_qc_callback(struct ptlrpc_request *req)
2369 struct obd_quotactl *oqctl;
2370 struct client_obd *cli = &req->rq_export->exp_obd->u.cli;
2372 oqctl = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
2373 if (oqctl == NULL) {
2374 CERROR("Can't unpack obd_quotactl\n");
2378 cli->cl_qchk_stat = oqctl->qc_stat;
2383 #ifdef HAVE_QUOTA_SUPPORT
2384 int target_handle_dqacq_callback(struct ptlrpc_request *req)
2387 struct obd_device *obd = req->rq_export->exp_obd;
2388 struct obd_device *master_obd = NULL, *lov_obd = NULL;
2389 struct obd_device_target *obt;
2390 struct lustre_quota_ctxt *qctxt;
2391 struct qunit_data *qdata = NULL;
2395 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ))
2398 rc = req_capsule_server_pack(&req->rq_pill);
2400 CERROR("packing reply failed!: rc = %d\n", rc);
2404 LASSERT(req->rq_export);
2406 qdata = quota_get_qdata(req, QUOTA_REQUEST, QUOTA_EXPORT);
2407 if (IS_ERR(qdata)) {
2408 rc = PTR_ERR(qdata);
2409 CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc);
2410 req->rq_status = rc;
2414 /* we use the observer */
2415 if (obd_pin_observer(obd, &lov_obd) ||
2416 obd_pin_observer(lov_obd, &master_obd)) {
2417 CERROR("Can't find the observer, it is recovering\n");
2418 req->rq_status = -EAGAIN;
2422 obt = &master_obd->u.obt;
2423 qctxt = &obt->obt_qctxt;
2425 if (!qctxt->lqc_setup || !qctxt->lqc_valid) {
2426 /* quota_type has not been processed yet, return EAGAIN
2427 * until we know whether or not quotas are supposed to
2429 CDEBUG(D_QUOTA, "quota_type not processed yet, return "
2431 req->rq_status = -EAGAIN;
2435 cfs_down_read(&obt->obt_rwsem);
2436 if (qctxt->lqc_lqs_hash == NULL) {
2437 cfs_up_read(&obt->obt_rwsem);
2438 /* quota_type has not been processed yet, return EAGAIN
2439 * until we know whether or not quotas are supposed to
2441 CDEBUG(D_QUOTA, "quota_ctxt is not ready yet, return "
2443 req->rq_status = -EAGAIN;
2447 LASSERT(qctxt->lqc_handler);
2448 rc = qctxt->lqc_handler(master_obd, qdata,
2449 lustre_msg_get_opc(req->rq_reqmsg));
2450 cfs_up_read(&obt->obt_rwsem);
2451 if (rc && rc != -EDQUOT)
2452 CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR,
2453 "dqacq/dqrel failed! (rc:%d)\n", rc);
2454 req->rq_status = rc;
2456 rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT);
2458 CERROR("Can't pack qunit_data(rc: %d)\n", rc);
2462 /* Block the quota req. b=14840 */
2463 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout);
2468 obd_unpin_observer(lov_obd);
2470 obd_unpin_observer(obd);
2472 rc = ptlrpc_reply(req);
2476 #endif /* !__KERNEL__ */
2478 #endif /* HAVE_QUOTA_SUPPORT */
2480 ldlm_mode_t lck_compat_array[] = {
2481 [LCK_EX] LCK_COMPAT_EX,
2482 [LCK_PW] LCK_COMPAT_PW,
2483 [LCK_PR] LCK_COMPAT_PR,
2484 [LCK_CW] LCK_COMPAT_CW,
2485 [LCK_CR] LCK_COMPAT_CR,
2486 [LCK_NL] LCK_COMPAT_NL,
2487 [LCK_GROUP] LCK_COMPAT_GROUP,
2488 [LCK_COS] LCK_COMPAT_COS,
2492 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2493 * not escape to the user level.
2495 int ldlm_error2errno(ldlm_error_t error)
2503 case ELDLM_LOCK_CHANGED:
2506 case ELDLM_LOCK_ABORTED:
2509 case ELDLM_LOCK_REPLACED:
2512 case ELDLM_NO_LOCK_DATA:
2515 case ELDLM_NAMESPACE_EXISTS:
2518 case ELDLM_BAD_NAMESPACE:
2522 if (((int)error) < 0) /* cast to signed type */
2523 result = error; /* as ldlm_error_t can be unsigned */
2525 CERROR("Invalid DLM result code: %d\n", error);
2531 EXPORT_SYMBOL(ldlm_error2errno);
2534 * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t.
2536 ldlm_error_t ldlm_errno2error(int err_no)
2545 error = ELDLM_LOCK_CHANGED;
2548 error = ELDLM_LOCK_ABORTED;
2551 error = ELDLM_LOCK_REPLACED;
2554 error = ELDLM_NO_LOCK_DATA;
2557 error = ELDLM_NAMESPACE_EXISTS;
2560 error = ELDLM_BAD_NAMESPACE;
2567 EXPORT_SYMBOL(ldlm_errno2error);
2569 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2570 void ldlm_dump_export_locks(struct obd_export *exp)
2572 cfs_spin_lock(&exp->exp_locks_list_guard);
2573 if (!cfs_list_empty(&exp->exp_locks_list)) {
2574 struct ldlm_lock *lock;
2576 CERROR("dumping locks for export %p,"
2577 "ignore if the unmount doesn't hang\n", exp);
2578 cfs_list_for_each_entry(lock, &exp->exp_locks_list, l_exp_refs_link)
2579 ldlm_lock_dump(D_ERROR, lock, 0);
2581 cfs_spin_unlock(&exp->exp_locks_list_guard);
2585 static int target_bulk_timeout(void *data)
2588 /* We don't fail the connection here, because having the export
2589 * killed makes the (vital) call to commitrw very sad.
2594 static inline char *bulk2type(struct ptlrpc_bulk_desc *desc)
2596 return desc->bd_type == BULK_GET_SINK ? "GET" : "PUT";
2599 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2600 struct l_wait_info *lwi)
2602 struct ptlrpc_request *req = desc->bd_req;
2606 /* Check if there is eviction in progress, and if so, wait for
2608 if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
2609 *lwi = LWI_INTR(NULL, NULL);
2610 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
2611 !cfs_atomic_read(&exp->exp_obd->
2612 obd_evict_inprogress),
2616 /* Check if client was evicted or tried to reconnect already */
2617 if (exp->exp_failed || exp->exp_abort_active_req) {
2620 if (desc->bd_type == BULK_PUT_SINK)
2621 rc = sptlrpc_svc_wrap_bulk(req, desc);
2623 rc = ptlrpc_start_bulk_transfer(desc);
2626 if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
2627 ptlrpc_abort_bulk(desc);
2628 } else if (rc == 0) {
2629 time_t start = cfs_time_current_sec();
2631 long timeoutl = req->rq_deadline - cfs_time_current_sec();
2632 cfs_duration_t timeout = timeoutl <= 0 ?
2633 CFS_TICK : cfs_time_seconds(timeoutl);
2634 *lwi = LWI_TIMEOUT_INTERVAL(timeout,
2635 cfs_time_seconds(1),
2636 target_bulk_timeout,
2638 rc = l_wait_event(desc->bd_waitq,
2639 !ptlrpc_server_bulk_active(desc) ||
2641 exp->exp_abort_active_req,
2643 LASSERT(rc == 0 || rc == -ETIMEDOUT);
2644 /* Wait again if we changed deadline */
2645 } while ((rc == -ETIMEDOUT) &&
2646 (req->rq_deadline > cfs_time_current_sec()));
2648 if (rc == -ETIMEDOUT) {
2649 DEBUG_REQ(D_ERROR, req,
2650 "timeout on bulk %s after %ld%+lds",
2652 req->rq_deadline - start,
2653 cfs_time_current_sec() -
2655 ptlrpc_abort_bulk(desc);
2656 } else if (exp->exp_failed) {
2657 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
2660 ptlrpc_abort_bulk(desc);
2661 } else if (exp->exp_abort_active_req) {
2662 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
2664 /* we don't reply anyway */
2666 ptlrpc_abort_bulk(desc);
2667 } else if (!desc->bd_success ||
2668 desc->bd_nob_transferred != desc->bd_nob) {
2669 DEBUG_REQ(D_ERROR, req, "%s bulk %s %d(%d)",
2671 "truncated" : "network error on",
2673 desc->bd_nob_transferred,
2675 /* XXX should this be a different errno? */
2677 } else if (desc->bd_type == BULK_GET_SINK) {
2678 rc = sptlrpc_svc_unwrap_bulk(req, desc);
2681 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
2682 bulk2type(desc), rc);
2687 EXPORT_SYMBOL(target_bulk_io);