4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2010, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * This file deals with various client/target related logic including recovery.
40 * TODO: This code more logically belongs in the ptlrpc module than in ldlm and
44 #define DEBUG_SUBSYSTEM S_LDLM
46 #include <linux/kthread.h>
47 #include <libcfs/libcfs.h>
49 #include <obd_class.h>
50 #include <lustre_dlm.h>
51 #include <lustre_net.h>
52 #include <lustre_sec.h>
53 #include "ldlm_internal.h"
55 /* @priority: If non-zero, move the selected connection to the list head.
56 * @create: If zero, only search in existing connections.
58 static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
59 int priority, int create)
61 struct ptlrpc_connection *ptlrpc_conn;
62 struct obd_import_conn *imp_conn = NULL, *item;
66 if (!create && !priority) {
67 CDEBUG(D_HA, "Nothing to do\n");
71 ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
73 CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid);
78 OBD_ALLOC(imp_conn, sizeof(*imp_conn));
80 GOTO(out_put, rc = -ENOMEM);
84 spin_lock(&imp->imp_lock);
85 list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
86 if (obd_uuid_equals(uuid, &item->oic_uuid)) {
88 list_del(&item->oic_item);
89 list_add(&item->oic_item,
91 item->oic_last_attempt = 0;
93 CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n",
94 imp, imp->imp_obd->obd_name, uuid->uuid,
95 (priority ? ", moved to head" : ""));
96 spin_unlock(&imp->imp_lock);
97 GOTO(out_free, rc = 0);
100 /* No existing import connection found for \a uuid. */
102 imp_conn->oic_conn = ptlrpc_conn;
103 imp_conn->oic_uuid = *uuid;
104 imp_conn->oic_last_attempt = 0;
106 list_add(&imp_conn->oic_item, &imp->imp_conn_list);
108 list_add_tail(&imp_conn->oic_item,
109 &imp->imp_conn_list);
110 CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
111 imp, imp->imp_obd->obd_name, uuid->uuid,
112 (priority ? "head" : "tail"));
114 spin_unlock(&imp->imp_lock);
115 GOTO(out_free, rc = -ENOENT);
118 spin_unlock(&imp->imp_lock);
122 OBD_FREE(imp_conn, sizeof(*imp_conn));
124 ptlrpc_connection_put(ptlrpc_conn);
128 int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
130 return import_set_conn(imp, uuid, 1, 0);
133 int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
136 return import_set_conn(imp, uuid, priority, 1);
138 EXPORT_SYMBOL(client_import_add_conn);
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 spin_lock(&imp->imp_lock);
148 if (list_empty(&imp->imp_conn_list)) {
149 LASSERT(!imp->imp_connection);
153 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 if (imp_conn == imp->imp_conn_current) {
159 LASSERT(imp_conn->oic_conn == imp->imp_connection);
161 if (imp->imp_state != LUSTRE_IMP_CLOSED &&
162 imp->imp_state != LUSTRE_IMP_DISCON) {
163 CERROR("can't remove current connection\n");
164 GOTO(out, rc = -EBUSY);
167 ptlrpc_connection_put(imp->imp_connection);
168 imp->imp_connection = NULL;
170 dlmexp = class_conn2export(&imp->imp_dlm_handle);
171 if (dlmexp && dlmexp->exp_connection) {
172 LASSERT(dlmexp->exp_connection ==
174 ptlrpc_connection_put(dlmexp->exp_connection);
175 dlmexp->exp_connection = NULL;
179 list_del(&imp_conn->oic_item);
180 ptlrpc_connection_put(imp_conn->oic_conn);
181 OBD_FREE(imp_conn, sizeof(*imp_conn));
182 CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
183 imp, imp->imp_obd->obd_name, uuid->uuid);
188 spin_unlock(&imp->imp_lock);
190 CERROR("connection %s not found\n", uuid->uuid);
193 EXPORT_SYMBOL(client_import_del_conn);
196 * Find conn UUID by peer NID. \a peer is a server NID. This function is used
197 * to find a conn uuid of \a imp which can reach \a 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 spin_lock(&imp->imp_lock);
207 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 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 RPCs have 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);
232 * Check whether or not the OSC is on MDT.
235 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
237 * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID
240 static int osc_on_mdt(char *obdname)
244 ptr = strrchr(obdname, '-');
248 if (strncmp(ptr + 1, "MDT", 3) == 0)
254 /* Configure an RPC client OBD device.
259 * 3 - inactive-on-startup
261 int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
263 struct client_obd *cli = &obddev->u.cli;
264 struct obd_import *imp;
265 struct obd_uuid server_uuid;
266 int rq_portal, rp_portal, connect_op;
267 char *name = obddev->obd_type->typ_name;
268 enum ldlm_ns_type ns_type = LDLM_NS_TYPE_UNKNOWN;
269 char *cli_name = lustre_cfg_buf(lcfg, 0);
273 /* In a more perfect world, we would hang a ptlrpc_client off of
274 * obd_type and just use the values from there. */
275 if (!strcmp(name, LUSTRE_OSC_NAME)) {
276 rq_portal = OST_REQUEST_PORTAL;
277 rp_portal = OSC_REPLY_PORTAL;
278 connect_op = OST_CONNECT;
279 cli->cl_sp_me = LUSTRE_SP_CLI;
280 cli->cl_sp_to = LUSTRE_SP_OST;
281 ns_type = LDLM_NS_TYPE_OSC;
282 } else if (!strcmp(name, LUSTRE_MDC_NAME) ||
283 !strcmp(name, LUSTRE_LWP_NAME)) {
284 rq_portal = MDS_REQUEST_PORTAL;
285 rp_portal = MDC_REPLY_PORTAL;
286 connect_op = MDS_CONNECT;
287 if (is_lwp_on_ost(cli_name))
288 cli->cl_sp_me = LUSTRE_SP_OST;
289 else if (is_lwp_on_mdt(cli_name))
290 cli->cl_sp_me = LUSTRE_SP_MDT;
292 cli->cl_sp_me = LUSTRE_SP_CLI;
293 cli->cl_sp_to = LUSTRE_SP_MDT;
294 ns_type = LDLM_NS_TYPE_MDC;
295 } else if (!strcmp(name, LUSTRE_OSP_NAME)) {
296 if (strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL) {
297 /* OSP_on_MDT for other MDTs */
298 connect_op = MDS_CONNECT;
299 cli->cl_sp_to = LUSTRE_SP_MDT;
300 ns_type = LDLM_NS_TYPE_MDC;
301 rq_portal = OUT_PORTAL;
303 /* OSP on MDT for OST */
304 connect_op = OST_CONNECT;
305 cli->cl_sp_to = LUSTRE_SP_OST;
306 ns_type = LDLM_NS_TYPE_OSC;
307 rq_portal = OST_REQUEST_PORTAL;
309 rp_portal = OSC_REPLY_PORTAL;
310 cli->cl_sp_me = LUSTRE_SP_MDT;
311 } else if (!strcmp(name, LUSTRE_MGC_NAME)) {
312 rq_portal = MGS_REQUEST_PORTAL;
313 rp_portal = MGC_REPLY_PORTAL;
314 connect_op = MGS_CONNECT;
315 cli->cl_sp_me = LUSTRE_SP_MGC;
316 cli->cl_sp_to = LUSTRE_SP_MGS;
317 cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID;
318 ns_type = LDLM_NS_TYPE_MGC;
320 CERROR("unknown client OBD type \"%s\", can't setup\n",
325 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
326 CERROR("requires a TARGET UUID\n");
330 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) {
331 CERROR("client UUID must be less than 38 characters\n");
335 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
336 CERROR("setup requires a SERVER UUID\n");
340 if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) {
341 CERROR("target UUID must be less than 38 characters\n");
345 init_rwsem(&cli->cl_sem);
346 mutex_init(&cli->cl_mgc_mutex);
347 cli->cl_conn_count = 0;
348 memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2),
349 min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2),
350 sizeof(server_uuid)));
352 cli->cl_dirty_pages = 0;
353 cli->cl_avail_grant = 0;
354 /* FIXME: Should limit this for the sum of all cl_dirty_max_pages. */
355 /* cl_dirty_max_pages may be changed at connect time in
356 * ptlrpc_connect_interpret(). */
357 client_adjust_max_dirty(cli);
358 INIT_LIST_HEAD(&cli->cl_cache_waiters);
359 INIT_LIST_HEAD(&cli->cl_loi_ready_list);
360 INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list);
361 INIT_LIST_HEAD(&cli->cl_loi_write_list);
362 INIT_LIST_HEAD(&cli->cl_loi_read_list);
363 spin_lock_init(&cli->cl_loi_list_lock);
364 atomic_set(&cli->cl_pending_w_pages, 0);
365 atomic_set(&cli->cl_pending_r_pages, 0);
366 cli->cl_r_in_flight = 0;
367 cli->cl_w_in_flight = 0;
369 spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
370 spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
371 spin_lock_init(&cli->cl_read_page_hist.oh_lock);
372 spin_lock_init(&cli->cl_write_page_hist.oh_lock);
373 spin_lock_init(&cli->cl_read_offset_hist.oh_lock);
374 spin_lock_init(&cli->cl_write_offset_hist.oh_lock);
377 INIT_LIST_HEAD(&cli->cl_lru_osc);
378 atomic_set(&cli->cl_lru_shrinkers, 0);
379 atomic_long_set(&cli->cl_lru_busy, 0);
380 atomic_long_set(&cli->cl_lru_in_list, 0);
381 INIT_LIST_HEAD(&cli->cl_lru_list);
382 spin_lock_init(&cli->cl_lru_list_lock);
383 atomic_long_set(&cli->cl_unstable_count, 0);
384 INIT_LIST_HEAD(&cli->cl_shrink_list);
386 init_waitqueue_head(&cli->cl_destroy_waitq);
387 atomic_set(&cli->cl_destroy_in_flight, 0);
388 #ifdef ENABLE_CHECKSUM
389 /* Turn on checksumming by default. */
390 cli->cl_checksum = 1;
392 * The supported checksum types will be worked out at connect time
393 * Set cl_chksum* to CRC32 for now to avoid returning screwed info
396 cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
398 atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS);
400 /* This value may be reduced at connect time in
401 * ptlrpc_connect_interpret() . We initialize it to only
402 * 1MB until we know what the performance looks like.
403 * In the future this should likely be increased. LU-1431 */
404 cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES,
405 LNET_MTU >> PAGE_CACHE_SHIFT);
407 /* set cl_chunkbits default value to PAGE_CACHE_SHIFT,
408 * it will be updated at OSC connection time. */
409 cli->cl_chunkbits = PAGE_CACHE_SHIFT;
411 if (!strcmp(name, LUSTRE_MDC_NAME)) {
412 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
413 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) {
414 cli->cl_max_rpcs_in_flight = 2;
415 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) {
416 cli->cl_max_rpcs_in_flight = 3;
417 } else if (totalram_pages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) {
418 cli->cl_max_rpcs_in_flight = 4;
420 if (osc_on_mdt(obddev->obd_name))
421 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_MAX;
423 cli->cl_max_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
426 spin_lock_init(&cli->cl_mod_rpcs_lock);
427 spin_lock_init(&cli->cl_mod_rpcs_hist.oh_lock);
428 cli->cl_max_mod_rpcs_in_flight = 0;
429 cli->cl_mod_rpcs_in_flight = 0;
430 cli->cl_close_rpcs_in_flight = 0;
431 init_waitqueue_head(&cli->cl_mod_rpcs_waitq);
432 cli->cl_mod_tag_bitmap = NULL;
434 if (connect_op == MDS_CONNECT) {
435 cli->cl_max_mod_rpcs_in_flight = cli->cl_max_rpcs_in_flight - 1;
436 OBD_ALLOC(cli->cl_mod_tag_bitmap,
437 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
438 if (cli->cl_mod_tag_bitmap == NULL)
439 GOTO(err, rc = -ENOMEM);
444 CERROR("ldlm_get_ref failed: %d\n", rc);
448 ptlrpc_init_client(rq_portal, rp_portal, name,
449 &obddev->obd_ldlm_client);
451 imp = class_new_import(obddev);
453 GOTO(err_ldlm, rc = -ENOENT);
454 imp->imp_client = &obddev->obd_ldlm_client;
455 imp->imp_connect_op = connect_op;
456 memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1),
457 LUSTRE_CFG_BUFLEN(lcfg, 1));
458 class_import_put(imp);
460 rc = client_import_add_conn(imp, &server_uuid, 1);
462 CERROR("can't add initial connection\n");
463 GOTO(err_import, rc);
466 cli->cl_import = imp;
467 /* cli->cl_max_mds_easize updated by mdc_init_ea_size() */
468 cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3);
470 if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
471 if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) {
472 CDEBUG(D_HA, "marking %s %s->%s as inactive\n",
473 name, obddev->obd_name,
474 cli->cl_target_uuid.uuid);
475 spin_lock(&imp->imp_lock);
476 imp->imp_deactive = 1;
477 spin_unlock(&imp->imp_lock);
481 obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name,
482 LDLM_NAMESPACE_CLIENT,
483 LDLM_NAMESPACE_GREEDY,
485 if (obddev->obd_namespace == NULL) {
486 CERROR("Unable to create client namespace - %s\n",
488 GOTO(err_import, rc = -ENOMEM);
494 class_destroy_import(imp);
498 if (cli->cl_mod_tag_bitmap != NULL)
499 OBD_FREE(cli->cl_mod_tag_bitmap,
500 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
501 cli->cl_mod_tag_bitmap = NULL;
505 EXPORT_SYMBOL(client_obd_setup);
507 int client_obd_cleanup(struct obd_device *obddev)
509 struct client_obd *cli = &obddev->u.cli;
512 ldlm_namespace_free_post(obddev->obd_namespace);
513 obddev->obd_namespace = NULL;
515 obd_cleanup_client_import(obddev);
516 LASSERT(obddev->u.cli.cl_import == NULL);
520 if (cli->cl_mod_tag_bitmap != NULL)
521 OBD_FREE(cli->cl_mod_tag_bitmap,
522 BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
523 cli->cl_mod_tag_bitmap = NULL;
527 EXPORT_SYMBOL(client_obd_cleanup);
529 /* ->o_connect() method for client side (OSC and MDC and MGC) */
530 int client_connect_import(const struct lu_env *env,
531 struct obd_export **exp,
532 struct obd_device *obd, struct obd_uuid *cluuid,
533 struct obd_connect_data *data, void *localdata)
535 struct client_obd *cli = &obd->u.cli;
536 struct obd_import *imp = cli->cl_import;
537 struct obd_connect_data *ocd;
538 struct lustre_handle conn = { 0 };
544 down_write(&cli->cl_sem);
545 if (cli->cl_conn_count > 0)
546 GOTO(out_sem, rc = -EALREADY);
548 rc = class_connect(&conn, obd, cluuid);
552 cli->cl_conn_count++;
553 *exp = class_conn2export(&conn);
555 LASSERT(obd->obd_namespace);
557 imp->imp_dlm_handle = conn;
558 rc = ptlrpc_init_import(imp);
562 ocd = &imp->imp_connect_data;
565 is_mdc = strncmp(imp->imp_obd->obd_type->typ_name,
566 LUSTRE_MDC_NAME, 3) == 0;
568 data->ocd_connect_flags |= OBD_CONNECT_MULTIMODRPCS;
569 imp->imp_connect_flags_orig = data->ocd_connect_flags;
572 rc = ptlrpc_connect_import(imp);
574 LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
577 LASSERT(*exp != NULL && (*exp)->exp_connection);
580 LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) ==
581 ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n",
582 data->ocd_connect_flags, ocd->ocd_connect_flags);
583 data->ocd_connect_flags = ocd->ocd_connect_flags;
584 /* clear the flag as it was not set and is not known
587 data->ocd_connect_flags &= ~OBD_CONNECT_MULTIMODRPCS;
590 ptlrpc_pinger_add_import(imp);
596 cli->cl_conn_count--;
597 class_disconnect(*exp);
601 up_write(&cli->cl_sem);
605 EXPORT_SYMBOL(client_connect_import);
607 int client_disconnect_export(struct obd_export *exp)
609 struct obd_device *obd = class_exp2obd(exp);
610 struct client_obd *cli;
611 struct obd_import *imp;
616 CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n",
617 exp, exp ? exp->exp_handle.h_cookie : -1);
622 imp = cli->cl_import;
624 down_write(&cli->cl_sem);
625 CDEBUG(D_INFO, "disconnect %s - %zu\n", obd->obd_name,
628 if (cli->cl_conn_count == 0) {
629 CERROR("disconnecting disconnected device (%s)\n",
631 GOTO(out_disconnect, rc = -EINVAL);
634 cli->cl_conn_count--;
635 if (cli->cl_conn_count != 0)
636 GOTO(out_disconnect, rc = 0);
638 /* Mark import deactivated now, so we don't try to reconnect if any
639 * of the cleanup RPCs fails (e.g. LDLM cancel, etc). We don't
640 * fully deactivate the import, or that would drop all requests. */
641 spin_lock(&imp->imp_lock);
642 imp->imp_deactive = 1;
643 spin_unlock(&imp->imp_lock);
645 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
646 * delete it regardless. (It's safe to delete an import that was
648 (void)ptlrpc_pinger_del_import(imp);
650 if (obd->obd_namespace != NULL) {
651 /* obd_force == local only */
652 ldlm_cli_cancel_unused(obd->obd_namespace, NULL,
653 obd->obd_force ? LCF_LOCAL : 0, NULL);
654 ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force);
657 /* There's no need to hold sem while disconnecting an import,
658 * and it may actually cause deadlock in GSS. */
659 up_write(&cli->cl_sem);
660 rc = ptlrpc_disconnect_import(imp, 0);
661 down_write(&cli->cl_sem);
663 ptlrpc_invalidate_import(imp);
668 /* Use server style - class_disconnect should be always called for
670 err = class_disconnect(exp);
674 up_write(&cli->cl_sem);
678 EXPORT_SYMBOL(client_disconnect_export);
680 #ifdef HAVE_SERVER_SUPPORT
681 int server_disconnect_export(struct obd_export *exp)
686 /* Disconnect early so that clients can't keep using export. */
687 rc = class_disconnect(exp);
688 /* Close import to avoid sending any requests. */
689 if (exp->exp_imp_reverse)
690 ptlrpc_cleanup_imp(exp->exp_imp_reverse);
692 ldlm_bl_thread_wakeup();
694 /* complete all outstanding replies */
695 spin_lock(&exp->exp_lock);
696 while (!list_empty(&exp->exp_outstanding_replies)) {
697 struct ptlrpc_reply_state *rs =
698 list_entry(exp->exp_outstanding_replies.next,
699 struct ptlrpc_reply_state, rs_exp_list);
700 struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
702 spin_lock(&svcpt->scp_rep_lock);
704 list_del_init(&rs->rs_exp_list);
705 spin_lock(&rs->rs_lock);
706 ptlrpc_schedule_difficult_reply(rs);
707 spin_unlock(&rs->rs_lock);
709 spin_unlock(&svcpt->scp_rep_lock);
711 spin_unlock(&exp->exp_lock);
715 EXPORT_SYMBOL(server_disconnect_export);
717 /* --------------------------------------------------------------------------
718 * from old lib/target.c
719 * -------------------------------------------------------------------------- */
721 static int target_handle_reconnect(struct lustre_handle *conn,
722 struct obd_export *exp,
723 struct obd_uuid *cluuid)
725 struct lustre_handle *hdl;
728 hdl = &exp->exp_imp_reverse->imp_remote_handle;
729 if (exp->exp_connection && lustre_handle_is_used(hdl)) {
730 struct obd_device *target;
732 target = exp->exp_obd;
734 /* Might be a re-connect after a partition. */
735 if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) {
736 if (target->obd_recovering) {
737 int timeout = cfs_duration_sec(cfs_time_sub(
739 &target->obd_recovery_timer),
740 cfs_time_current()));
742 LCONSOLE_WARN("%s: Client %s (at %s) reconnect"
743 "ing, waiting for %d clients in recov"
744 "ery for %d:%.02d\n", target->obd_name,
745 obd_uuid2str(&exp->exp_client_uuid),
746 obd_export_nid2str(exp),
747 target->obd_max_recoverable_clients,
748 timeout / 60, timeout % 60);
750 LCONSOLE_WARN("%s: Client %s (at %s) "
751 "reconnecting\n", target->obd_name,
752 obd_uuid2str(&exp->exp_client_uuid),
753 obd_export_nid2str(exp));
756 conn->cookie = exp->exp_handle.h_cookie;
757 /* target_handle_connect() treats EALREADY and
758 * -EALREADY differently. EALREADY means we are
759 * doing a valid reconnect from the same client. */
762 LCONSOLE_WARN("%s: already connected client %s (at %s) "
763 "with handle "LPX64". Rejecting client "
764 "with the same UUID trying to reconnect "
765 "with handle "LPX64"\n", target->obd_name,
766 obd_uuid2str(&exp->exp_client_uuid),
767 obd_export_nid2str(exp),
768 hdl->cookie, conn->cookie);
769 memset(conn, 0, sizeof *conn);
770 /* target_handle_connect() treats EALREADY and
771 * -EALREADY differently. -EALREADY is an error
772 * (same UUID, different handle). */
777 conn->cookie = exp->exp_handle.h_cookie;
778 CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n",
779 cluuid->uuid, exp, conn->cookie);
783 void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data,
786 struct obd_export *exp = cb_data;
788 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
789 obd->obd_name, exp->exp_client_uuid.uuid);
791 spin_lock(&exp->exp_lock);
792 exp->exp_need_sync = 0;
793 spin_unlock(&exp->exp_lock);
794 class_export_cb_put(exp);
798 check_and_start_recovery_timer(struct obd_device *obd,
799 struct ptlrpc_request *req, int new_client);
802 * update flags for import during reconnect process
804 static int rev_import_flags_update(struct obd_import *revimp,
805 struct ptlrpc_request *req)
808 struct obd_connect_data *data;
810 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
812 if (data->ocd_connect_flags & OBD_CONNECT_AT)
813 revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
815 revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
817 revimp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
819 rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr);
821 CERROR("%s: cannot get reverse import %s security: rc = %d\n",
822 revimp->imp_client->cli_name,
823 libcfs_id2str(req->rq_peer), rc);
831 * Allocate a new reverse import for an export.
833 * \retval -errno in case error hit
834 * \retval 0 if reverse import correctly init
836 int rev_import_init(struct obd_export *export)
838 struct obd_device *obd = export->exp_obd;
839 struct obd_import *revimp;
841 LASSERT(export->exp_imp_reverse == NULL);
843 revimp = class_new_import(obd);
847 revimp->imp_remote_handle.cookie = 0ULL;
848 revimp->imp_client = &obd->obd_ldlm_client;
849 revimp->imp_dlm_fake = 1;
851 /* it is safe to connect import in new state as no sends possible */
852 spin_lock(&export->exp_lock);
853 export->exp_imp_reverse = revimp;
854 spin_unlock(&export->exp_lock);
855 class_import_put(revimp);
859 EXPORT_SYMBOL(rev_import_init);
862 * Handle reconnect for an export.
864 * \param exp export to handle reconnect process
865 * \param req client reconnect request
867 * \retval -rc in case securitfy flavor can't be changed
868 * \retval 0 in case none problems
870 static int rev_import_reconnect(struct obd_export *exp,
871 struct ptlrpc_request *req)
873 struct obd_import *revimp = exp->exp_imp_reverse;
874 struct lustre_handle *lh;
877 /* avoid sending a request until import flags are changed */
878 ptlrpc_import_enter_resend(revimp);
880 if (revimp->imp_connection != NULL)
881 ptlrpc_connection_put(revimp->imp_connection);
884 * client from recovery don't have a handle so we need to take from
885 * request. it may produce situation when wrong client connected
886 * to recovery as we trust a client uuid
888 lh = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
889 revimp->imp_remote_handle = *lh;
891 /* unknown versions will be caught in
892 * ptlrpc_handle_server_req_in->lustre_unpack_msg() */
893 revimp->imp_msg_magic = req->rq_reqmsg->lm_magic;
895 revimp->imp_connection = ptlrpc_connection_addref(exp->exp_connection);
897 rc = rev_import_flags_update(revimp, req);
899 /* it is safe to still be in RECOVERY phase as we are not able
900 * to setup correct security flavor so requests are not able to
901 * be delivered correctly */
905 /* resend all rpc's via new connection */
906 return ptlrpc_import_recovery_state_machine(revimp);
909 int target_handle_connect(struct ptlrpc_request *req)
911 struct obd_device *target = NULL;
912 struct obd_export *export = NULL;
913 /* connect handle - filled from target_handle_reconnect in
915 struct lustre_handle conn;
916 struct lustre_handle *tmp;
917 struct obd_uuid tgtuuid;
918 struct obd_uuid cluuid;
923 bool mds_conn = false, lw_client = false;
924 bool mds_mds_conn = false;
925 bool new_mds_mds_conn = false;
926 bool target_referenced = false;
927 struct obd_connect_data *data, *tmpdata;
929 lnet_nid_t *client_nid = NULL;
932 OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
934 str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID);
936 DEBUG_REQ(D_ERROR, req, "bad target UUID for connect");
937 GOTO(out, rc = -EINVAL);
940 obd_str2uuid(&tgtuuid, str);
941 target = class_uuid2obd(&tgtuuid);
943 target = class_name2obd(str);
946 deuuidify(str, NULL, &target_start, &target_len);
947 LCONSOLE_ERROR_MSG(0x137, "%s: not available for connect "
948 "from %s (no target). If you are running "
949 "an HA pair check that the target is "
950 "mounted on the other server.\n", str,
951 libcfs_nid2str(req->rq_peer.nid));
952 GOTO(out, rc = -ENODEV);
955 spin_lock(&target->obd_dev_lock);
956 if (target->obd_stopping || !target->obd_set_up) {
957 spin_unlock(&target->obd_dev_lock);
959 deuuidify(str, NULL, &target_start, &target_len);
960 LCONSOLE_INFO("%.*s: Not available for connect from %s (%s)\n",
961 target_len, target_start,
962 libcfs_nid2str(req->rq_peer.nid),
963 (target->obd_stopping ?
964 "stopping" : "not set up"));
965 GOTO(out, rc = -ENODEV);
968 if (target->obd_no_conn) {
969 spin_unlock(&target->obd_dev_lock);
971 CDEBUG(D_INFO, "%s: Temporarily refusing client connection "
972 "from %s\n", target->obd_name,
973 libcfs_nid2str(req->rq_peer.nid));
974 GOTO(out, rc = -EAGAIN);
977 /* Make sure the target isn't cleaned up while we're here. Yes,
978 * there's still a race between the above check and our incref here.
979 * Really, class_uuid2obd should take the ref. */
980 class_incref(target, __func__, current);
981 target_referenced = true;
983 target->obd_conn_inprogress++;
984 spin_unlock(&target->obd_dev_lock);
986 str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID);
988 DEBUG_REQ(D_ERROR, req, "bad client UUID for connect");
989 GOTO(out, rc = -EINVAL);
992 obd_str2uuid(&cluuid, str);
994 tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN);
996 GOTO(out, rc = -EPROTO);
1000 size = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1002 data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA);
1004 GOTO(out, rc = -EPROTO);
1006 rc = req_capsule_server_pack(&req->rq_pill);
1010 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
1011 /* Don't allow clients to connect that are using old 1.8 format
1012 * protocol conventions (LUSTRE_MSG_MAGIC_v1, !MSGHDR_CKSUM_INCOMPAT18,
1013 * ldlm_flock_policy_wire format, MDT_ATTR_xTIME_SET, etc). The
1014 * FULL20 flag should be set on all connections since 2.0, but no
1015 * longer affects behaviour.
1017 * Later this check will be disabled and the flag can be retired
1018 * completely once interop with 3.0 is no longer needed.
1020 if (!(data->ocd_connect_flags & OBD_CONNECT_FULL20))
1021 GOTO(out, rc = -EPROTO);
1024 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1025 if (data->ocd_version < LUSTRE_VERSION_CODE -
1026 LUSTRE_VERSION_ALLOWED_OFFSET ||
1027 data->ocd_version > LUSTRE_VERSION_CODE +
1028 LUSTRE_VERSION_ALLOWED_OFFSET) {
1029 DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) "
1030 "libclient connection attempt",
1031 data->ocd_version < LUSTRE_VERSION_CODE ?
1033 OBD_OCD_VERSION_MAJOR(data->ocd_version),
1034 OBD_OCD_VERSION_MINOR(data->ocd_version),
1035 OBD_OCD_VERSION_PATCH(data->ocd_version),
1036 OBD_OCD_VERSION_FIX(data->ocd_version));
1037 data = req_capsule_server_sized_get(&req->rq_pill,
1039 offsetof(typeof(*data), ocd_version) +
1040 sizeof(data->ocd_version));
1042 data->ocd_connect_flags = OBD_CONNECT_VERSION;
1043 data->ocd_version = LUSTRE_VERSION_CODE;
1045 GOTO(out, rc = -EPROTO);
1049 /* Note: lw_client is needed in MDS-MDS failover during update log
1050 * processing, so we needs to allow lw_client to be connected at
1051 * anytime, instead of only the initial connection */
1052 lw_client = (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) != 0;
1054 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) {
1055 mds_conn = (data->ocd_connect_flags & OBD_CONNECT_MDS) != 0;
1056 mds_mds_conn = (data->ocd_connect_flags &
1057 OBD_CONNECT_MDS_MDS) != 0;
1059 /* OBD_CONNECT_MNE_SWAB is defined as OBD_CONNECT_MDS_MDS
1060 * for Imperative Recovery connection from MGC to MGS.
1062 * Via check OBD_CONNECT_FID, we can distinguish whether
1063 * the OBD_CONNECT_MDS_MDS/OBD_CONNECT_MNE_SWAB is from
1066 (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
1067 (data->ocd_connect_flags & OBD_CONNECT_FID) &&
1068 (data->ocd_connect_flags & OBD_CONNECT_VERSION)) {
1069 __u32 major = OBD_OCD_VERSION_MAJOR(data->ocd_version);
1070 __u32 minor = OBD_OCD_VERSION_MINOR(data->ocd_version);
1071 __u32 patch = OBD_OCD_VERSION_PATCH(data->ocd_version);
1073 /* We do not support the MDT-MDT interoperations with
1074 * different version MDT because of protocol changes. */
1075 if (unlikely(major != LUSTRE_MAJOR ||
1076 minor != LUSTRE_MINOR ||
1077 abs(patch - LUSTRE_PATCH) > 3)) {
1078 LCONSOLE_WARN("%s (%u.%u.%u.%u) refused the "
1079 "connection from different version MDT "
1080 "(%d.%d.%d.%d) %s %s\n",
1081 target->obd_name, LUSTRE_MAJOR,
1082 LUSTRE_MINOR, LUSTRE_PATCH, LUSTRE_FIX,
1083 major, minor, patch,
1084 OBD_OCD_VERSION_FIX(data->ocd_version),
1085 libcfs_nid2str(req->rq_peer.nid), str);
1087 GOTO(out, rc = -EPROTO);
1092 /* lctl gets a backstage, all-access pass. */
1093 if (obd_uuid_equals(&cluuid, &target->obd_uuid))
1094 goto dont_check_exports;
1096 export = cfs_hash_lookup(target->obd_uuid_hash, &cluuid);
1100 /* We've found an export in the hash. */
1102 spin_lock(&export->exp_lock);
1104 if (export->exp_connecting) { /* bug 9635, et. al. */
1105 spin_unlock(&export->exp_lock);
1106 LCONSOLE_WARN("%s: Export %p already connecting from %s\n",
1107 export->exp_obd->obd_name, export,
1108 libcfs_nid2str(req->rq_peer.nid));
1109 class_export_put(export);
1112 } else if ((mds_conn || lw_client) && export->exp_connection != NULL) {
1113 spin_unlock(&export->exp_lock);
1114 if (req->rq_peer.nid != export->exp_connection->c_peer.nid)
1115 /* MDS or LWP reconnected after failover. */
1116 LCONSOLE_WARN("%s: Received %s connection from "
1117 "%s, removing former export from %s\n",
1118 target->obd_name, mds_conn ? "MDS" : "LWP",
1119 libcfs_nid2str(req->rq_peer.nid),
1120 libcfs_nid2str(export->exp_connection->c_peer.nid));
1122 /* New MDS connection from the same NID. */
1123 LCONSOLE_WARN("%s: Received new %s connection from "
1124 "%s, removing former export from same NID\n",
1125 target->obd_name, mds_conn ? "MDS" : "LWP",
1126 libcfs_nid2str(req->rq_peer.nid));
1127 class_fail_export(export);
1128 class_export_put(export);
1131 } else if (export->exp_connection != NULL &&
1132 req->rq_peer.nid != export->exp_connection->c_peer.nid &&
1133 (lustre_msg_get_op_flags(req->rq_reqmsg) &
1134 MSG_CONNECT_INITIAL)) {
1135 spin_unlock(&export->exp_lock);
1136 /* In MDS failover we have static UUID but NID can change. */
1137 LCONSOLE_WARN("%s: Client %s seen on new nid %s when "
1138 "existing nid %s is already connected\n",
1139 target->obd_name, cluuid.uuid,
1140 libcfs_nid2str(req->rq_peer.nid),
1142 export->exp_connection->c_peer.nid));
1144 class_export_put(export);
1147 export->exp_connecting = 1;
1148 spin_unlock(&export->exp_lock);
1149 LASSERT(export->exp_obd == target);
1151 rc = target_handle_reconnect(&conn, export, &cluuid);
1154 /* If we found an export, we already unlocked. */
1157 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout);
1158 } else if (req->rq_export == NULL &&
1159 atomic_read(&export->exp_rpc_count) > 0) {
1160 LCONSOLE_WARN("%s: Client %s (at %s) refused connection, "
1161 "still busy with %d references\n",
1162 target->obd_name, cluuid.uuid,
1163 libcfs_nid2str(req->rq_peer.nid),
1164 atomic_read(&export->exp_refcount));
1165 GOTO(out, rc = -EBUSY);
1166 } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) {
1167 if (!strstr(cluuid.uuid, "mdt"))
1168 LCONSOLE_WARN("%s: Rejecting reconnect from the "
1169 "known client %s (at %s) because it "
1170 "is indicating it is a new client",
1171 target->obd_name, cluuid.uuid,
1172 libcfs_nid2str(req->rq_peer.nid));
1173 GOTO(out, rc = -EALREADY);
1175 OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout);
1182 CDEBUG(D_HA, "%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n",
1183 target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1184 target->obd_recovering ? "recovering/" : "", data->ocd_transno,
1185 export, (long)cfs_time_current_sec(),
1186 export ? (long)export->exp_last_request_time : 0);
1188 /* If this is the first time a client connects, reset the recovery
1189 * timer. Discard lightweight connections which might be local. */
1190 if (!lw_client && rc == 0 && target->obd_recovering)
1191 check_and_start_recovery_timer(target, req, export == NULL);
1193 /* We want to handle EALREADY but *not* -EALREADY from
1194 * target_handle_reconnect(), return reconnection state in a flag. */
1195 if (rc == EALREADY) {
1196 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
1202 /* Tell the client if we support replayable requests. */
1203 if (target->obd_replayable)
1204 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
1205 client_nid = &req->rq_peer.nid;
1207 if (export == NULL) {
1208 /* allow lightweight connections during recovery */
1209 /* allow "new" MDT to be connected during recovery, since we
1210 * need retrieve recovery update records from it */
1211 if (target->obd_recovering && !lw_client && !mds_mds_conn) {
1213 int c; /* connected */
1214 int i; /* in progress */
1216 int s; /* stale/evicted */
1218 c = atomic_read(&target->obd_connected_clients);
1219 i = atomic_read(&target->obd_lock_replay_clients);
1220 k = target->obd_max_recoverable_clients;
1221 s = target->obd_stale_clients;
1222 t = cfs_timer_deadline(&target->obd_recovery_timer);
1223 t = cfs_time_sub(t, cfs_time_current());
1224 t = cfs_duration_sec(t);
1225 LCONSOLE_WARN("%s: Denying connection for new client %s"
1226 "(at %s), waiting for %d known clients "
1227 "(%d recovered, %d in progress, and %d "
1228 "evicted) to recover in %d:%.02d\n",
1229 target->obd_name, cluuid.uuid,
1230 libcfs_nid2str(req->rq_peer.nid), k,
1231 c - i, i, s, (int)t / 60,
1236 rc = obd_connect(req->rq_svc_thread->t_env,
1237 &export, target, &cluuid, data,
1239 if (mds_conn && OBD_FAIL_CHECK(OBD_FAIL_TGT_RCVG_FLAG))
1240 lustre_msg_add_op_flags(req->rq_repmsg,
1241 MSG_CONNECT_RECOVERING);
1243 conn.cookie = export->exp_handle.h_cookie;
1244 rc = rev_import_init(export);
1248 new_mds_mds_conn = true;
1251 rc = obd_reconnect(req->rq_svc_thread->t_env,
1252 export, target, &cluuid, data, client_nid);
1257 LASSERT(target->u.obt.obt_magic == OBT_MAGIC);
1258 data->ocd_instance = target->u.obt.obt_instance;
1260 /* Return only the parts of obd_connect_data that we understand, so the
1261 * client knows that we don't understand the rest. */
1263 tmpsize = req_capsule_get_size(&req->rq_pill, &RMF_CONNECT_DATA,
1265 tmpdata = req_capsule_server_get(&req->rq_pill,
1267 /* Don't use struct assignment here, because the client reply
1268 * buffer may be smaller/larger than the local struct
1269 * obd_connect_data. */
1270 memcpy(tmpdata, data, min(tmpsize, size));
1273 /* If the client and the server are the same node, we will already
1274 * have an export that really points to the client's DLM export,
1275 * because we have a shared handles table.
1277 * XXX this will go away when shaver stops sending the "connect" handle
1278 * in the real "remote handle" field of the request --phik 24 Apr 2003
1280 ptlrpc_request_change_export(req, export);
1282 spin_lock(&export->exp_lock);
1283 if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
1284 spin_unlock(&export->exp_lock);
1285 CDEBUG(D_RPCTRACE, "%s: %s already connected at greater "
1286 "or equal conn_cnt: %d >= %d\n",
1287 cluuid.uuid, libcfs_nid2str(req->rq_peer.nid),
1288 export->exp_conn_cnt,
1289 lustre_msg_get_conn_cnt(req->rq_reqmsg));
1291 GOTO(out, rc = -EALREADY);
1293 LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0);
1294 export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1296 /* Don't evict liblustre clients for not pinging. */
1297 if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) {
1298 export->exp_libclient = 1;
1299 spin_unlock(&export->exp_lock);
1301 spin_lock(&target->obd_dev_lock);
1302 list_del_init(&export->exp_obd_chain_timed);
1303 spin_unlock(&target->obd_dev_lock);
1305 spin_unlock(&export->exp_lock);
1308 if (export->exp_connection != NULL) {
1309 /* Check to see if connection came from another NID. */
1310 if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) &&
1311 !hlist_unhashed(&export->exp_nid_hash))
1312 cfs_hash_del(export->exp_obd->obd_nid_hash,
1313 &export->exp_connection->c_peer.nid,
1314 &export->exp_nid_hash);
1316 ptlrpc_connection_put(export->exp_connection);
1319 export->exp_connection = ptlrpc_connection_get(req->rq_peer,
1322 if (hlist_unhashed(&export->exp_nid_hash))
1323 cfs_hash_add(export->exp_obd->obd_nid_hash,
1324 &export->exp_connection->c_peer.nid,
1325 &export->exp_nid_hash);
1327 lustre_msg_set_handle(req->rq_repmsg, &conn);
1329 rc = rev_import_reconnect(export, req);
1333 if (target->obd_recovering && !export->exp_in_recovery && !lw_client) {
1335 __u64 transno = data->ocd_transno;
1337 spin_lock(&export->exp_lock);
1338 /* possible race with class_disconnect_stale_exports,
1339 * export may be already in the eviction process */
1340 if (export->exp_failed) {
1341 spin_unlock(&export->exp_lock);
1342 GOTO(out, rc = -ENODEV);
1344 export->exp_in_recovery = 1;
1345 export->exp_req_replay_needed = 1;
1346 export->exp_lock_replay_needed = 1;
1347 spin_unlock(&export->exp_lock);
1349 has_transno = !!(lustre_msg_get_op_flags(req->rq_reqmsg) &
1350 MSG_CONNECT_TRANSNO);
1351 if (has_transno && transno == 0)
1352 CWARN("Connect with zero transno!\n");
1354 if (has_transno && transno > 0 &&
1355 transno < target->obd_next_recovery_transno &&
1356 transno > target->obd_last_committed) {
1357 /* Another way is to use cmpxchg() to be lock-free. */
1358 spin_lock(&target->obd_recovery_task_lock);
1359 if (transno < target->obd_next_recovery_transno)
1360 target->obd_next_recovery_transno = transno;
1361 spin_unlock(&target->obd_recovery_task_lock);
1364 atomic_inc(&target->obd_req_replay_clients);
1365 atomic_inc(&target->obd_lock_replay_clients);
1366 /* Note: MDS-MDS connection is allowed to be connected during
1367 * recovery, no matter if the exports needs to be recoveried.
1368 * Because we need retrieve updates logs from all other MDTs.
1369 * So if the MDS-MDS export is new, obd_max_recoverable_clients
1370 * also needs to be increased to match other recovery checking
1372 if (new_mds_mds_conn)
1373 target->obd_max_recoverable_clients++;
1374 if (atomic_inc_return(&target->obd_connected_clients) ==
1375 target->obd_max_recoverable_clients)
1376 wake_up(&target->obd_next_transno_waitq);
1379 /* Tell the client we're in recovery, when client is involved in it. */
1380 if (target->obd_recovering && !lw_client)
1381 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
1385 spin_lock(&export->exp_lock);
1386 export->exp_connecting = 0;
1387 spin_unlock(&export->exp_lock);
1389 class_export_put(export);
1391 if (target_referenced == true && target != NULL) {
1392 spin_lock(&target->obd_dev_lock);
1393 target->obd_conn_inprogress--;
1394 spin_unlock(&target->obd_dev_lock);
1396 class_decref(target, __func__, current);
1398 req->rq_status = rc;
1402 int target_handle_disconnect(struct ptlrpc_request *req)
1407 rc = req_capsule_server_pack(&req->rq_pill);
1411 /* Keep the rq_export around so we can send the reply. */
1412 req->rq_status = obd_disconnect(class_export_get(req->rq_export));
1417 void target_destroy_export(struct obd_export *exp)
1419 struct obd_import *imp = NULL;
1420 /* exports created from last_rcvd data, and "fake"
1421 exports created by lctl don't have an import */
1422 spin_lock(&exp->exp_lock);
1423 if (exp->exp_imp_reverse != NULL) {
1424 imp = exp->exp_imp_reverse;
1425 exp->exp_imp_reverse = NULL;
1427 spin_unlock(&exp->exp_lock);
1429 client_destroy_import(imp);
1431 LASSERT_ATOMIC_ZERO(&exp->exp_locks_count);
1432 LASSERT_ATOMIC_ZERO(&exp->exp_rpc_count);
1433 LASSERT_ATOMIC_ZERO(&exp->exp_cb_count);
1434 LASSERT_ATOMIC_ZERO(&exp->exp_replay_count);
1436 EXPORT_SYMBOL(target_destroy_export);
1439 * Recovery functions
1441 static void target_request_copy_get(struct ptlrpc_request *req)
1443 class_export_rpc_inc(req->rq_export);
1444 LASSERT(list_empty(&req->rq_list));
1445 INIT_LIST_HEAD(&req->rq_replay_list);
1447 /* Increase refcount to keep request in queue. */
1448 atomic_inc(&req->rq_refcount);
1449 /* Let export know it has replays to be handled. */
1450 atomic_inc(&req->rq_export->exp_replay_count);
1453 static void target_request_copy_put(struct ptlrpc_request *req)
1455 LASSERT(list_empty(&req->rq_replay_list));
1456 LASSERT_ATOMIC_POS(&req->rq_export->exp_replay_count);
1458 atomic_dec(&req->rq_export->exp_replay_count);
1459 class_export_rpc_dec(req->rq_export);
1460 ptlrpc_server_drop_request(req);
1463 static int target_exp_enqueue_req_replay(struct ptlrpc_request *req)
1465 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
1466 struct obd_export *exp = req->rq_export;
1467 struct ptlrpc_request *reqiter;
1468 struct ptlrpc_request *dup_req = NULL;
1473 spin_lock(&exp->exp_lock);
1474 list_for_each_entry(reqiter, &exp->exp_req_replay_queue,
1476 if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) {
1484 /* We expect it with RESENT and REPLAY flags. */
1485 if ((lustre_msg_get_flags(req->rq_reqmsg) &
1486 (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY))
1487 CERROR("invalid flags %x of resent replay\n",
1488 lustre_msg_get_flags(req->rq_reqmsg));
1490 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1493 new_conn = lustre_msg_get_conn_cnt(req->rq_reqmsg);
1495 lustre_msg_get_conn_cnt(dup_req->rq_reqmsg))
1496 lustre_msg_set_conn_cnt(dup_req->rq_reqmsg,
1500 list_add_tail(&req->rq_replay_list,
1501 &exp->exp_req_replay_queue);
1504 spin_unlock(&exp->exp_lock);
1508 static void target_exp_dequeue_req_replay(struct ptlrpc_request *req)
1510 LASSERT(!list_empty(&req->rq_replay_list));
1511 LASSERT(req->rq_export);
1513 spin_lock(&req->rq_export->exp_lock);
1514 list_del_init(&req->rq_replay_list);
1515 spin_unlock(&req->rq_export->exp_lock);
1518 static void target_finish_recovery(struct lu_target *lut)
1520 struct obd_device *obd = lut->lut_obd;
1523 /* Only log a recovery message when recovery has occurred. */
1524 if (obd->obd_recovery_start) {
1525 time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() -
1526 obd->obd_recovery_start);
1527 LCONSOLE_INFO("%s: Recovery over after %d:%.02d, of %d clients "
1528 "%d recovered and %d %s evicted.\n", obd->obd_name,
1529 (int)elapsed_time / 60, (int)elapsed_time % 60,
1530 obd->obd_max_recoverable_clients,
1531 atomic_read(&obd->obd_connected_clients),
1532 obd->obd_stale_clients,
1533 obd->obd_stale_clients == 1 ? "was" : "were");
1536 ldlm_reprocess_all_ns(obd->obd_namespace);
1537 spin_lock(&obd->obd_recovery_task_lock);
1538 if (!list_empty(&obd->obd_req_replay_queue) ||
1539 !list_empty(&obd->obd_lock_replay_queue) ||
1540 !list_empty(&obd->obd_final_req_queue)) {
1541 CERROR("%s: Recovery queues ( %s%s%s) are not empty\n",
1543 list_empty(&obd->obd_req_replay_queue) ? "" : "req ",
1544 list_empty(&obd->obd_lock_replay_queue) ? \
1546 list_empty(&obd->obd_final_req_queue) ? \
1548 spin_unlock(&obd->obd_recovery_task_lock);
1551 spin_unlock(&obd->obd_recovery_task_lock);
1553 if (lut->lut_tdtd != NULL &&
1554 (!list_empty(&lut->lut_tdtd->tdtd_replay_list) ||
1555 !list_empty(&lut->lut_tdtd->tdtd_replay_finish_list))) {
1556 dtrq_list_dump(lut->lut_tdtd, D_ERROR);
1557 dtrq_list_destroy(lut->lut_tdtd);
1560 obd->obd_recovery_end = cfs_time_current_sec();
1562 /* When recovery finished, cleanup orphans on MDS and OST. */
1563 if (OBT(obd) && OBP(obd, postrecov)) {
1564 int rc = OBP(obd, postrecov)(obd);
1566 LCONSOLE_WARN("%s: Post recovery failed, rc %d\n",
1572 static void abort_req_replay_queue(struct obd_device *obd)
1574 struct ptlrpc_request *req, *n;
1575 struct list_head abort_list;
1577 INIT_LIST_HEAD(&abort_list);
1578 spin_lock(&obd->obd_recovery_task_lock);
1579 list_splice_init(&obd->obd_req_replay_queue, &abort_list);
1580 spin_unlock(&obd->obd_recovery_task_lock);
1581 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1582 DEBUG_REQ(D_WARNING, req, "aborted:");
1583 req->rq_status = -ENOTCONN;
1584 if (ptlrpc_error(req)) {
1585 DEBUG_REQ(D_ERROR, req,
1586 "failed abort_req_reply; skipping");
1588 target_exp_dequeue_req_replay(req);
1589 target_request_copy_put(req);
1593 static void abort_lock_replay_queue(struct obd_device *obd)
1595 struct ptlrpc_request *req, *n;
1596 struct list_head abort_list;
1598 INIT_LIST_HEAD(&abort_list);
1599 spin_lock(&obd->obd_recovery_task_lock);
1600 list_splice_init(&obd->obd_lock_replay_queue, &abort_list);
1601 spin_unlock(&obd->obd_recovery_task_lock);
1602 list_for_each_entry_safe(req, n, &abort_list, rq_list) {
1603 DEBUG_REQ(D_ERROR, req, "aborted:");
1604 req->rq_status = -ENOTCONN;
1605 if (ptlrpc_error(req)) {
1606 DEBUG_REQ(D_ERROR, req,
1607 "failed abort_lock_reply; skipping");
1609 target_request_copy_put(req);
1613 /* Called from a cleanup function if the device is being cleaned up
1614 forcefully. The exports should all have been disconnected already,
1615 the only thing left to do is
1616 - clear the recovery flags
1618 - free queued requests and replies, but don't send replies
1619 Because the obd_stopping flag is set, no new requests should be received.
1622 void target_cleanup_recovery(struct obd_device *obd)
1624 struct ptlrpc_request *req, *n;
1625 struct list_head clean_list;
1627 INIT_LIST_HEAD(&clean_list);
1628 spin_lock(&obd->obd_dev_lock);
1629 if (!obd->obd_recovering) {
1630 spin_unlock(&obd->obd_dev_lock);
1634 obd->obd_recovering = obd->obd_abort_recovery = 0;
1635 obd->obd_force_abort_recovery = 0;
1636 spin_unlock(&obd->obd_dev_lock);
1638 spin_lock(&obd->obd_recovery_task_lock);
1639 target_cancel_recovery_timer(obd);
1640 list_splice_init(&obd->obd_req_replay_queue, &clean_list);
1641 spin_unlock(&obd->obd_recovery_task_lock);
1643 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1644 LASSERT(req->rq_reply_state == NULL);
1645 target_exp_dequeue_req_replay(req);
1646 target_request_copy_put(req);
1649 spin_lock(&obd->obd_recovery_task_lock);
1650 list_splice_init(&obd->obd_lock_replay_queue, &clean_list);
1651 list_splice_init(&obd->obd_final_req_queue, &clean_list);
1652 spin_unlock(&obd->obd_recovery_task_lock);
1654 list_for_each_entry_safe(req, n, &clean_list, rq_list) {
1655 LASSERT(req->rq_reply_state == NULL);
1656 target_request_copy_put(req);
1661 EXPORT_SYMBOL(target_cleanup_recovery);
1663 /* obd_recovery_task_lock should be held */
1664 void target_cancel_recovery_timer(struct obd_device *obd)
1666 CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
1667 cfs_timer_disarm(&obd->obd_recovery_timer);
1670 static void target_start_recovery_timer(struct obd_device *obd)
1672 if (obd->obd_recovery_start != 0)
1675 spin_lock(&obd->obd_dev_lock);
1676 if (!obd->obd_recovering || obd->obd_abort_recovery ||
1677 obd->obd_force_abort_recovery) {
1678 spin_unlock(&obd->obd_dev_lock);
1682 LASSERT(obd->obd_recovery_timeout != 0);
1684 if (obd->obd_recovery_start != 0) {
1685 spin_unlock(&obd->obd_dev_lock);
1689 cfs_timer_arm(&obd->obd_recovery_timer,
1690 cfs_time_shift(obd->obd_recovery_timeout));
1691 obd->obd_recovery_start = cfs_time_current_sec();
1692 spin_unlock(&obd->obd_dev_lock);
1694 LCONSOLE_WARN("%s: Will be in recovery for at least %d:%.02d, "
1695 "or until %d client%s reconnect%s\n",
1697 obd->obd_recovery_timeout / 60,
1698 obd->obd_recovery_timeout % 60,
1699 obd->obd_max_recoverable_clients,
1700 (obd->obd_max_recoverable_clients == 1) ? "" : "s",
1701 (obd->obd_max_recoverable_clients == 1) ? "s": "");
1705 * extend recovery window.
1707 * if @extend is true, extend recovery window to have @drt remaining at least;
1708 * otherwise, make sure the recovery timeout value is not less than @drt.
1710 static void extend_recovery_timer(struct obd_device *obd, int drt, bool extend)
1714 cfs_duration_t left;
1717 spin_lock(&obd->obd_dev_lock);
1718 if (!obd->obd_recovering || obd->obd_abort_recovery ||
1719 obd->obd_force_abort_recovery) {
1720 spin_unlock(&obd->obd_dev_lock);
1723 LASSERT(obd->obd_recovery_start != 0);
1725 now = cfs_time_current_sec();
1726 to = obd->obd_recovery_timeout;
1727 end = obd->obd_recovery_start + to;
1728 left = cfs_time_sub(end, now);
1730 if (extend && (drt > left)) {
1732 } else if (!extend && (drt > to)) {
1736 if (to > obd->obd_recovery_time_hard)
1737 to = obd->obd_recovery_time_hard;
1738 if (obd->obd_recovery_timeout < to) {
1739 obd->obd_recovery_timeout = to;
1740 end = obd->obd_recovery_start + to;
1741 cfs_timer_arm(&obd->obd_recovery_timer,
1742 cfs_time_shift(end - now));
1744 spin_unlock(&obd->obd_dev_lock);
1746 CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n",
1747 obd->obd_name, (unsigned)cfs_time_sub(end, now));
1750 /* Reset the timer with each new client connection */
1752 * This timer is actually reconnect_timer, which is for making sure
1753 * the total recovery window is at least as big as my reconnect
1754 * attempt timing. So the initial recovery time_out will be set to
1755 * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming
1756 * from client is bigger than this, then the recovery time_out will
1757 * be extended to make sure the client could be reconnected, in the
1758 * process, the timeout from the new client should be ignored.
1762 check_and_start_recovery_timer(struct obd_device *obd,
1763 struct ptlrpc_request *req,
1766 int service_time = lustre_msg_get_service_time(req->rq_reqmsg);
1767 struct obd_device_target *obt = &obd->u.obt;
1769 if (!new_client && service_time)
1770 /* Teach server about old server's estimates, as first guess
1771 * at how long new requests will take. */
1772 at_measured(&req->rq_rqbd->rqbd_svcpt->scp_at_estimate,
1775 target_start_recovery_timer(obd);
1777 /* Convert the service time to RPC timeout,
1778 * and reuse service_time to limit stack usage. */
1779 service_time = at_est2timeout(service_time);
1781 /* We expect other clients to timeout within service_time, then try
1782 * to reconnect, then try the failover server. The max delay between
1783 * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL. */
1784 service_time += 2 * INITIAL_CONNECT_TIMEOUT;
1786 LASSERT(obt->obt_magic == OBT_MAGIC);
1787 service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC);
1788 if (service_time > obd->obd_recovery_timeout && !new_client)
1789 extend_recovery_timer(obd, service_time, false);
1792 /** Health checking routines */
1793 static inline int exp_connect_healthy(struct obd_export *exp)
1795 return (exp->exp_in_recovery);
1798 /** if export done req_replay or has replay in queue */
1799 static inline int exp_req_replay_healthy(struct obd_export *exp)
1801 return (!exp->exp_req_replay_needed ||
1802 atomic_read(&exp->exp_replay_count) > 0);
1804 /** if export done lock_replay or has replay in queue */
1805 static inline int exp_lock_replay_healthy(struct obd_export *exp)
1807 return (!exp->exp_lock_replay_needed ||
1808 atomic_read(&exp->exp_replay_count) > 0);
1811 static inline int exp_vbr_healthy(struct obd_export *exp)
1813 return (!exp->exp_vbr_failed);
1816 static inline int exp_finished(struct obd_export *exp)
1818 return (exp->exp_in_recovery && !exp->exp_lock_replay_needed);
1821 static int check_for_next_transno(struct lu_target *lut)
1823 struct ptlrpc_request *req = NULL;
1824 struct obd_device *obd = lut->lut_obd;
1825 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
1826 int wake_up = 0, connected, completed, queue_len;
1827 __u64 req_transno = 0;
1828 __u64 update_transno = 0;
1829 __u64 next_transno = 0;
1832 spin_lock(&obd->obd_recovery_task_lock);
1833 if (!list_empty(&obd->obd_req_replay_queue)) {
1834 req = list_entry(obd->obd_req_replay_queue.next,
1835 struct ptlrpc_request, rq_list);
1836 req_transno = lustre_msg_get_transno(req->rq_reqmsg);
1840 update_transno = distribute_txn_get_next_transno(tdtd);
1842 connected = atomic_read(&obd->obd_connected_clients);
1843 completed = connected - atomic_read(&obd->obd_req_replay_clients);
1844 queue_len = obd->obd_requests_queued_for_recovery;
1845 next_transno = obd->obd_next_recovery_transno;
1847 CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, "
1848 "req_transno: "LPU64", next_transno: "LPU64"\n",
1849 obd->obd_max_recoverable_clients, connected, completed,
1850 queue_len, req_transno, next_transno);
1852 if (obd->obd_abort_recovery || obd->obd_force_abort_recovery) {
1853 CDEBUG(D_HA, "waking for aborted recovery\n");
1855 } else if (obd->obd_recovery_expired) {
1856 CDEBUG(D_HA, "waking for expired recovery\n");
1858 } else if (tdtd != NULL && req != NULL &&
1859 is_req_replayed_by_update(req)) {
1860 LASSERTF(req_transno < next_transno, "req_transno "LPU64
1861 "next_transno"LPU64"\n", req_transno, next_transno);
1862 CDEBUG(D_HA, "waking for duplicate req ("LPU64")\n",
1865 } else if (req_transno == next_transno ||
1866 (update_transno != 0 && update_transno <= next_transno)) {
1867 CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
1869 } else if (queue_len > 0 &&
1870 queue_len == atomic_read(&obd->obd_req_replay_clients)) {
1872 /** handle gaps occured due to lost reply or VBR */
1873 LASSERTF(req_transno >= next_transno,
1874 "req_transno: "LPU64", next_transno: "LPU64"\n",
1875 req_transno, next_transno);
1876 if (req_transno > obd->obd_last_committed &&
1877 !obd->obd_version_recov)
1880 "%s: waking for gap in transno, VBR is %s (skip: "
1881 LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64
1882 ", next_update "LPD64" last_committed: "LPD64")\n",
1883 obd->obd_name, obd->obd_version_recov ? "ON" : "OFF",
1884 next_transno, queue_len, completed, connected,
1885 req_transno, update_transno, obd->obd_last_committed);
1886 obd->obd_next_recovery_transno = req_transno;
1888 } else if (atomic_read(&obd->obd_req_replay_clients) == 0) {
1889 CDEBUG(D_HA, "waking for completed recovery\n");
1891 } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) {
1892 CDEBUG(D_HA, "accepting transno gaps is explicitly allowed"
1893 " by fail_lock, waking up ("LPD64")\n", next_transno);
1894 obd->obd_next_recovery_transno = req_transno;
1897 spin_unlock(&obd->obd_recovery_task_lock);
1901 static int check_for_next_lock(struct lu_target *lut)
1903 struct obd_device *obd = lut->lut_obd;
1906 spin_lock(&obd->obd_recovery_task_lock);
1907 if (!list_empty(&obd->obd_lock_replay_queue)) {
1908 CDEBUG(D_HA, "waking for next lock\n");
1910 } else if (atomic_read(&obd->obd_lock_replay_clients) == 0) {
1911 CDEBUG(D_HA, "waking for completed lock replay\n");
1913 } else if (obd->obd_abort_recovery || obd->obd_force_abort_recovery) {
1914 CDEBUG(D_HA, "waking for aborted recovery\n");
1916 } else if (obd->obd_recovery_expired) {
1917 CDEBUG(D_HA, "waking for expired recovery\n");
1920 spin_unlock(&obd->obd_recovery_task_lock);
1926 * wait for recovery events,
1927 * check its status with help of check_routine
1928 * evict dead clients via health_check
1930 static int target_recovery_overseer(struct lu_target *lut,
1931 int (*check_routine)(struct lu_target *),
1932 int (*health_check)(struct obd_export *))
1934 struct obd_device *obd = lut->lut_obd;
1936 if ((obd->obd_recovery_start != 0) && (cfs_time_current_sec() >=
1937 (obd->obd_recovery_start + obd->obd_recovery_time_hard))) {
1938 CWARN("recovery is aborted by hard timeout\n");
1939 obd->obd_abort_recovery = 1;
1942 while (wait_event_timeout(obd->obd_next_transno_waitq,
1944 msecs_to_jiffies(60 * MSEC_PER_SEC)) == 0)
1945 /* wait indefinitely for event, but don't trigger watchdog */;
1947 if (obd->obd_abort_recovery || obd->obd_force_abort_recovery) {
1948 CWARN("recovery is aborted, evict exports in recovery\n");
1949 /** evict exports which didn't finish recovery yet */
1950 class_disconnect_stale_exports(obd, exp_finished);
1952 } else if (obd->obd_recovery_expired) {
1953 obd->obd_recovery_expired = 0;
1954 /** If some clients died being recovered, evict them */
1955 LCONSOLE_WARN("%s: recovery is timed out, "
1956 "evict stale exports\n", obd->obd_name);
1957 /** evict cexports with no replay in queue, they are stalled */
1958 class_disconnect_stale_exports(obd, health_check);
1959 /** continue with VBR */
1960 spin_lock(&obd->obd_dev_lock);
1961 obd->obd_version_recov = 1;
1962 spin_unlock(&obd->obd_dev_lock);
1964 * reset timer, recovery will proceed with versions now,
1965 * timeout is set just to handle reconnection delays
1967 extend_recovery_timer(obd, RECONNECT_DELAY_MAX, true);
1968 /** Wait for recovery events again, after evicting bad clients */
1974 static struct ptlrpc_request *target_next_replay_lock(struct lu_target *lut)
1976 struct obd_device *obd = lut->lut_obd;
1977 struct ptlrpc_request *req = NULL;
1979 CDEBUG(D_HA, "Waiting for lock\n");
1980 if (target_recovery_overseer(lut, check_for_next_lock,
1981 exp_lock_replay_healthy))
1982 abort_lock_replay_queue(obd);
1984 spin_lock(&obd->obd_recovery_task_lock);
1985 if (!list_empty(&obd->obd_lock_replay_queue)) {
1986 req = list_entry(obd->obd_lock_replay_queue.next,
1987 struct ptlrpc_request, rq_list);
1988 list_del_init(&req->rq_list);
1989 spin_unlock(&obd->obd_recovery_task_lock);
1991 spin_unlock(&obd->obd_recovery_task_lock);
1992 LASSERT(list_empty(&obd->obd_lock_replay_queue));
1993 LASSERT(atomic_read(&obd->obd_lock_replay_clients) == 0);
1994 /** evict exports failed VBR */
1995 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2000 static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd)
2002 struct ptlrpc_request *req = NULL;
2004 spin_lock(&obd->obd_recovery_task_lock);
2005 if (!list_empty(&obd->obd_final_req_queue)) {
2006 req = list_entry(obd->obd_final_req_queue.next,
2007 struct ptlrpc_request, rq_list);
2008 list_del_init(&req->rq_list);
2009 spin_unlock(&obd->obd_recovery_task_lock);
2010 if (req->rq_export->exp_in_recovery) {
2011 spin_lock(&req->rq_export->exp_lock);
2012 req->rq_export->exp_in_recovery = 0;
2013 spin_unlock(&req->rq_export->exp_lock);
2016 spin_unlock(&obd->obd_recovery_task_lock);
2021 static void handle_recovery_req(struct ptlrpc_thread *thread,
2022 struct ptlrpc_request *req,
2023 svc_handler_t handler)
2028 * export can be evicted during recovery, no need to handle replays for
2029 * it after that, discard such request silently
2031 if (req->rq_export->exp_disconnected)
2034 req->rq_session.lc_thread = thread;
2035 req->rq_svc_thread = thread;
2036 req->rq_svc_thread->t_env->le_ses = &req->rq_session;
2038 /* thread context */
2039 lu_context_enter(&thread->t_env->le_ctx);
2041 lu_context_exit(&thread->t_env->le_ctx);
2043 /* don't reset timer for final stage */
2044 if (!exp_finished(req->rq_export)) {
2045 int to = obd_timeout;
2048 * Add request timeout to the recovery time so next request from
2049 * this client may come in recovery time
2052 struct ptlrpc_service_part *svcpt;
2054 svcpt = req->rq_rqbd->rqbd_svcpt;
2055 /* If the server sent early reply for this request,
2056 * the client will recalculate the timeout according to
2057 * current server estimate service time, so we will
2058 * use the maxium timeout here for waiting the client
2059 * sending the next req */
2060 to = max((int)at_est2timeout(
2061 at_get(&svcpt->scp_at_estimate)),
2062 (int)lustre_msg_get_timeout(req->rq_reqmsg));
2063 /* Add 2 net_latency, one for balance rq_deadline
2064 * (see ptl_send_rpc), one for resend the req to server,
2065 * Note: client will pack net_latency in replay req
2066 * (see ptlrpc_replay_req) */
2067 to += 2 * lustre_msg_get_service_time(req->rq_reqmsg);
2069 extend_recovery_timer(class_exp2obd(req->rq_export), to, true);
2074 /** Checking routines for recovery */
2075 static int check_for_recovery_ready(struct lu_target *lut)
2077 struct obd_device *obd = lut->lut_obd;
2078 unsigned int clnts = atomic_read(&obd->obd_connected_clients);
2080 CDEBUG(D_HA, "connected %d stale %d max_recoverable_clients %d"
2081 " abort %d expired %d\n", clnts, obd->obd_stale_clients,
2082 obd->obd_max_recoverable_clients, obd->obd_abort_recovery,
2083 obd->obd_recovery_expired);
2085 if (obd->obd_force_abort_recovery)
2088 if (!obd->obd_abort_recovery && !obd->obd_recovery_expired) {
2089 LASSERT(clnts <= obd->obd_max_recoverable_clients);
2090 if (clnts + obd->obd_stale_clients <
2091 obd->obd_max_recoverable_clients)
2095 if (lut->lut_tdtd != NULL) {
2096 if (!lut->lut_tdtd->tdtd_replay_ready) {
2097 /* Let's extend recovery timer, in case the recovery
2098 * timer expired, and some clients got evicted */
2099 extend_recovery_timer(obd, obd->obd_recovery_timeout,
2103 dtrq_list_dump(lut->lut_tdtd, D_HA);
2111 REQUEST_RECOVERY = 1,
2112 UPDATE_RECOVERY = 2,
2115 static __u64 get_next_replay_req_transno(struct obd_device *obd)
2119 if (!list_empty(&obd->obd_req_replay_queue)) {
2120 struct ptlrpc_request *req;
2122 req = list_entry(obd->obd_req_replay_queue.next,
2123 struct ptlrpc_request, rq_list);
2124 transno = lustre_msg_get_transno(req->rq_reqmsg);
2129 __u64 get_next_transno(struct lu_target *lut, int *type)
2131 struct obd_device *obd = lut->lut_obd;
2132 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2134 __u64 update_transno;
2137 transno = get_next_replay_req_transno(obd);
2139 *type = REQUEST_RECOVERY;
2144 update_transno = distribute_txn_get_next_transno(tdtd);
2145 if (transno == 0 || (transno >= update_transno &&
2146 update_transno != 0)) {
2147 transno = update_transno;
2149 *type = UPDATE_RECOVERY;
2156 * drop duplicate replay request
2158 * Because the operation has been replayed by update recovery, the request
2159 * with the same transno will be dropped and also notify the client to send
2160 * next replay request.
2162 * \param[in] env execution environment
2163 * \param[in] obd failover obd device
2164 * \param[in] req request to be dropped
2166 static void drop_duplicate_replay_req(struct lu_env *env,
2167 struct obd_device *obd,
2168 struct ptlrpc_request *req)
2170 DEBUG_REQ(D_HA, req, "remove t"LPD64" from %s because of duplicate"
2171 " update records are found.\n",
2172 lustre_msg_get_transno(req->rq_reqmsg),
2173 libcfs_nid2str(req->rq_peer.nid));
2175 /* Right now, only for MDS reint operation update replay and
2176 * normal request replay can have the same transno */
2177 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT) {
2178 req_capsule_set(&req->rq_pill, &RQF_MDS_REINT);
2179 req->rq_status = req_capsule_server_pack(&req->rq_pill);
2180 if (likely(req->rq_export))
2181 target_committed_to_req(req);
2182 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
2183 target_send_reply(req, req->rq_status, 0);
2185 DEBUG_REQ(D_ERROR, req, "wrong opc" "from %s\n",
2186 libcfs_nid2str(req->rq_peer.nid));
2188 target_exp_dequeue_req_replay(req);
2189 target_request_copy_put(req);
2190 obd->obd_replayed_requests++;
2193 static void replay_request_or_update(struct lu_env *env,
2194 struct lu_target *lut,
2195 struct target_recovery_data *trd,
2196 struct ptlrpc_thread *thread)
2198 struct obd_device *obd = lut->lut_obd;
2199 struct ptlrpc_request *req = NULL;
2204 CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
2205 obd->obd_next_recovery_transno);
2207 /* Replay all of request and update by transno */
2209 struct target_distribute_txn_data *tdtd = lut->lut_tdtd;
2211 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_DELAY2, cfs_fail_val);
2213 /** It is needed to extend recovery window above
2214 * recovery_time_soft. Extending is possible only in the
2215 * end of recovery window (see more details in
2216 * handle_recovery_req()).
2218 CFS_FAIL_TIMEOUT_MS(OBD_FAIL_TGT_REPLAY_DELAY, 300);
2220 if (target_recovery_overseer(lut, check_for_next_transno,
2221 exp_req_replay_healthy)) {
2222 abort_req_replay_queue(obd);
2223 abort_lock_replay_queue(obd);
2226 spin_lock(&obd->obd_recovery_task_lock);
2227 transno = get_next_transno(lut, &type);
2228 if (type == REQUEST_RECOVERY && transno != 0) {
2229 /* Drop replay request from client side, if the
2230 * replay has been executed by update with the
2232 req = list_entry(obd->obd_req_replay_queue.next,
2233 struct ptlrpc_request, rq_list);
2235 list_del_init(&req->rq_list);
2236 obd->obd_requests_queued_for_recovery--;
2237 spin_unlock(&obd->obd_recovery_task_lock);
2239 /* Let's check if the request has been redone by
2241 if (is_req_replayed_by_update(req)) {
2242 struct distribute_txn_replay_req *dtrq;
2244 dtrq = distribute_txn_lookup_finish_list(tdtd,
2246 LASSERT(dtrq != NULL);
2247 spin_lock(&tdtd->tdtd_replay_list_lock);
2248 list_del_init(&dtrq->dtrq_list);
2249 spin_unlock(&tdtd->tdtd_replay_list_lock);
2252 drop_duplicate_replay_req(env, obd, req);
2257 LASSERT(trd->trd_processing_task == current_pid());
2258 DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s",
2259 lustre_msg_get_transno(req->rq_reqmsg),
2260 libcfs_nid2str(req->rq_peer.nid));
2262 handle_recovery_req(thread, req,
2263 trd->trd_recovery_handler);
2265 * bz18031: increase next_recovery_transno before
2266 * target_request_copy_put() will drop exp_rpc reference
2268 spin_lock(&obd->obd_recovery_task_lock);
2269 obd->obd_next_recovery_transno++;
2270 spin_unlock(&obd->obd_recovery_task_lock);
2271 target_exp_dequeue_req_replay(req);
2272 target_request_copy_put(req);
2273 obd->obd_replayed_requests++;
2274 } else if (type == UPDATE_RECOVERY && transno != 0) {
2275 struct distribute_txn_replay_req *dtrq;
2276 bool update_transno = false;
2278 spin_unlock(&obd->obd_recovery_task_lock);
2280 LASSERT(tdtd != NULL);
2281 dtrq = distribute_txn_get_next_req(tdtd);
2282 lu_context_enter(&thread->t_env->le_ctx);
2283 tdtd->tdtd_replay_handler(env, tdtd, dtrq);
2284 lu_context_exit(&thread->t_env->le_ctx);
2285 extend_recovery_timer(obd, obd_timeout, true);
2287 /* Add it to the replay finish list */
2288 spin_lock(&tdtd->tdtd_replay_list_lock);
2289 if (dtrq->dtrq_xid != 0) {
2290 CDEBUG(D_HA, "Move x"LPU64" t"LPU64
2291 " to finish list\n", dtrq->dtrq_xid,
2292 dtrq->dtrq_master_transno);
2293 list_add(&dtrq->dtrq_list,
2294 &tdtd->tdtd_replay_finish_list);
2295 update_transno = true;
2299 spin_unlock(&tdtd->tdtd_replay_list_lock);
2301 if (update_transno) {
2302 spin_lock(&obd->obd_recovery_task_lock);
2303 if (transno == obd->obd_next_recovery_transno)
2304 obd->obd_next_recovery_transno++;
2306 obd->obd_next_recovery_transno)
2307 obd->obd_next_recovery_transno =
2309 spin_unlock(&obd->obd_recovery_task_lock);
2312 spin_unlock(&obd->obd_recovery_task_lock);
2313 LASSERT(list_empty(&obd->obd_req_replay_queue));
2314 LASSERT(atomic_read(&obd->obd_req_replay_clients) == 0);
2315 /** evict exports failed VBR */
2316 class_disconnect_stale_exports(obd, exp_vbr_healthy);
2322 static int target_recovery_thread(void *arg)
2324 struct lu_target *lut = arg;
2325 struct obd_device *obd = lut->lut_obd;
2326 struct ptlrpc_request *req;
2327 struct target_recovery_data *trd = &obd->obd_recovery_data;
2328 unsigned long delta;
2330 struct ptlrpc_thread *thread = NULL;
2334 unshare_fs_struct();
2335 OBD_ALLOC_PTR(thread);
2341 OBD_FREE_PTR(thread);
2345 rc = lu_context_init(&env->le_ctx, LCT_MD_THREAD | LCT_DT_THREAD);
2347 OBD_FREE_PTR(thread);
2352 thread->t_env = env;
2353 thread->t_id = -1; /* force filter_iobuf_get/put to use local buffers */
2354 env->le_ctx.lc_thread = thread;
2355 tgt_io_thread_init(thread); /* init thread_big_cache for IO requests */
2356 thread->t_watchdog = NULL;
2358 CDEBUG(D_HA, "%s: started recovery thread pid %d\n", obd->obd_name,
2360 trd->trd_processing_task = current_pid();
2362 spin_lock(&obd->obd_dev_lock);
2363 obd->obd_recovering = 1;
2364 spin_unlock(&obd->obd_dev_lock);
2365 complete(&trd->trd_starting);
2367 /* first of all, we have to know the first transno to replay */
2368 if (target_recovery_overseer(lut, check_for_recovery_ready,
2369 exp_connect_healthy)) {
2370 abort_req_replay_queue(obd);
2371 abort_lock_replay_queue(obd);
2372 if (lut->lut_tdtd != NULL)
2373 dtrq_list_destroy(lut->lut_tdtd);
2376 /* next stage: replay requests or update */
2378 CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n",
2379 atomic_read(&obd->obd_req_replay_clients),
2380 obd->obd_next_recovery_transno);
2381 replay_request_or_update(env, lut, trd, thread);
2384 * The second stage: replay locks
2386 CDEBUG(D_INFO, "2: lock replay stage - %d clients\n",
2387 atomic_read(&obd->obd_lock_replay_clients));
2388 while ((req = target_next_replay_lock(lut))) {
2389 LASSERT(trd->trd_processing_task == current_pid());
2390 DEBUG_REQ(D_HA, req, "processing lock from %s: ",
2391 libcfs_nid2str(req->rq_peer.nid));
2392 handle_recovery_req(thread, req,
2393 trd->trd_recovery_handler);
2394 target_request_copy_put(req);
2395 obd->obd_replayed_locks++;
2399 * The third stage: reply on final pings, at this moment all clients
2400 * must have request in final queue
2402 CFS_FAIL_TIMEOUT(OBD_FAIL_TGT_REPLAY_RECONNECT, cfs_fail_val);
2403 CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n");
2404 /** Update server last boot epoch */
2405 tgt_boot_epoch_update(lut);
2406 /* We drop recoverying flag to forward all new requests
2407 * to regular mds_handle() since now */
2408 spin_lock(&obd->obd_dev_lock);
2409 obd->obd_recovering = obd->obd_abort_recovery = 0;
2410 spin_unlock(&obd->obd_dev_lock);
2411 spin_lock(&obd->obd_recovery_task_lock);
2412 target_cancel_recovery_timer(obd);
2413 spin_unlock(&obd->obd_recovery_task_lock);
2414 while ((req = target_next_final_ping(obd))) {
2415 LASSERT(trd->trd_processing_task == current_pid());
2416 DEBUG_REQ(D_HA, req, "processing final ping from %s: ",
2417 libcfs_nid2str(req->rq_peer.nid));
2418 handle_recovery_req(thread, req,
2419 trd->trd_recovery_handler);
2420 /* Because the waiting client can not send ping to server,
2421 * so we need refresh the last_request_time, to avoid the
2422 * export is being evicted */
2423 ptlrpc_update_export_timer(req->rq_export, 0);
2424 target_request_copy_put(req);
2427 delta = jiffies_to_msecs(jiffies - delta) / MSEC_PER_SEC;
2428 CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n",
2429 delta, obd->obd_replayed_requests, obd->obd_replayed_locks);
2430 if (delta > OBD_RECOVERY_TIME_SOFT) {
2431 CWARN("too long recovery - read logs\n");
2432 libcfs_debug_dumplog();
2435 target_finish_recovery(lut);
2437 lu_context_fini(&env->le_ctx);
2438 trd->trd_processing_task = 0;
2439 complete(&trd->trd_finishing);
2441 tgt_io_thread_done(thread);
2442 OBD_FREE_PTR(thread);
2447 static int target_start_recovery_thread(struct lu_target *lut,
2448 svc_handler_t handler)
2450 struct obd_device *obd = lut->lut_obd;
2452 struct target_recovery_data *trd = &obd->obd_recovery_data;
2454 memset(trd, 0, sizeof(*trd));
2455 init_completion(&trd->trd_starting);
2456 init_completion(&trd->trd_finishing);
2457 trd->trd_recovery_handler = handler;
2459 if (!IS_ERR(kthread_run(target_recovery_thread,
2460 lut, "tgt_recov"))) {
2461 wait_for_completion(&trd->trd_starting);
2462 LASSERT(obd->obd_recovering != 0);
2470 void target_stop_recovery_thread(struct obd_device *obd)
2472 if (obd->obd_recovery_data.trd_processing_task > 0) {
2473 struct target_recovery_data *trd = &obd->obd_recovery_data;
2474 /** recovery can be done but postrecovery is not yet */
2475 spin_lock(&obd->obd_dev_lock);
2476 if (obd->obd_recovering) {
2477 CERROR("%s: Aborting recovery\n", obd->obd_name);
2478 obd->obd_abort_recovery = 1;
2479 wake_up(&obd->obd_next_transno_waitq);
2481 spin_unlock(&obd->obd_dev_lock);
2482 wait_for_completion(&trd->trd_finishing);
2485 EXPORT_SYMBOL(target_stop_recovery_thread);
2487 void target_recovery_fini(struct obd_device *obd)
2489 class_disconnect_exports(obd);
2490 target_stop_recovery_thread(obd);
2491 target_cleanup_recovery(obd);
2493 EXPORT_SYMBOL(target_recovery_fini);
2495 static void target_recovery_expired(unsigned long castmeharder)
2497 struct obd_device *obd = (struct obd_device *)castmeharder;
2498 CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery"
2499 " after %lds (%d clients connected)\n",
2500 obd->obd_name, atomic_read(&obd->obd_lock_replay_clients),
2501 cfs_time_current_sec()- obd->obd_recovery_start,
2502 atomic_read(&obd->obd_connected_clients));
2504 obd->obd_recovery_expired = 1;
2505 wake_up(&obd->obd_next_transno_waitq);
2508 void target_recovery_init(struct lu_target *lut, svc_handler_t handler)
2510 struct obd_device *obd = lut->lut_obd;
2512 if (obd->obd_max_recoverable_clients == 0) {
2513 /** Update server last boot epoch */
2514 tgt_boot_epoch_update(lut);
2518 CDEBUG(D_HA, "RECOVERY: service %s, %d recoverable clients, "
2519 "last_transno "LPU64"\n", obd->obd_name,
2520 obd->obd_max_recoverable_clients, obd->obd_last_committed);
2521 LASSERT(obd->obd_stopping == 0);
2522 obd->obd_next_recovery_transno = obd->obd_last_committed + 1;
2523 obd->obd_recovery_start = 0;
2524 obd->obd_recovery_end = 0;
2526 cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd);
2527 target_start_recovery_thread(lut, handler);
2529 EXPORT_SYMBOL(target_recovery_init);
2531 static int target_process_req_flags(struct obd_device *obd,
2532 struct ptlrpc_request *req)
2534 struct obd_export *exp = req->rq_export;
2535 LASSERT(exp != NULL);
2536 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2537 /* client declares he's ready to replay locks */
2538 spin_lock(&exp->exp_lock);
2539 if (exp->exp_req_replay_needed) {
2540 exp->exp_req_replay_needed = 0;
2541 spin_unlock(&exp->exp_lock);
2543 LASSERT_ATOMIC_POS(&obd->obd_req_replay_clients);
2544 atomic_dec(&obd->obd_req_replay_clients);
2546 spin_unlock(&exp->exp_lock);
2549 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2550 /* client declares he's ready to complete recovery
2551 * so, we put the request on th final queue */
2552 spin_lock(&exp->exp_lock);
2553 if (exp->exp_lock_replay_needed) {
2554 exp->exp_lock_replay_needed = 0;
2555 spin_unlock(&exp->exp_lock);
2557 LASSERT_ATOMIC_POS(&obd->obd_lock_replay_clients);
2558 atomic_dec(&obd->obd_lock_replay_clients);
2560 spin_unlock(&exp->exp_lock);
2566 int target_queue_recovery_request(struct ptlrpc_request *req,
2567 struct obd_device *obd)
2569 __u64 transno = lustre_msg_get_transno(req->rq_reqmsg);
2570 struct ptlrpc_request *reqiter;
2574 if (obd->obd_recovery_data.trd_processing_task == current_pid()) {
2575 /* Processing the queue right now, don't re-add. */
2579 target_process_req_flags(obd, req);
2581 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) {
2582 /* client declares he's ready to complete recovery
2583 * so, we put the request on th final queue */
2584 target_request_copy_get(req);
2585 DEBUG_REQ(D_HA, req, "queue final req");
2586 wake_up(&obd->obd_next_transno_waitq);
2587 spin_lock(&obd->obd_recovery_task_lock);
2588 if (obd->obd_recovering) {
2589 list_add_tail(&req->rq_list,
2590 &obd->obd_final_req_queue);
2592 spin_unlock(&obd->obd_recovery_task_lock);
2593 target_request_copy_put(req);
2594 RETURN(obd->obd_stopping ? -ENOTCONN : 1);
2596 spin_unlock(&obd->obd_recovery_task_lock);
2599 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) {
2600 /* client declares he's ready to replay locks */
2601 target_request_copy_get(req);
2602 DEBUG_REQ(D_HA, req, "queue lock replay req");
2603 wake_up(&obd->obd_next_transno_waitq);
2604 spin_lock(&obd->obd_recovery_task_lock);
2605 LASSERT(obd->obd_recovering);
2606 /* usually due to recovery abort */
2607 if (!req->rq_export->exp_in_recovery) {
2608 spin_unlock(&obd->obd_recovery_task_lock);
2609 target_request_copy_put(req);
2612 LASSERT(req->rq_export->exp_lock_replay_needed);
2613 list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue);
2614 spin_unlock(&obd->obd_recovery_task_lock);
2618 /* CAVEAT EMPTOR: The incoming request message has been swabbed
2619 * (i.e. buflens etc are in my own byte order), but type-dependent
2620 * buffers (eg mdt_body, ost_body etc) have NOT been swabbed. */
2623 INIT_LIST_HEAD(&req->rq_list);
2624 DEBUG_REQ(D_HA, req, "not queueing");
2628 /* If we're processing the queue, we want don't want to queue this
2631 * Also, if this request has a transno less than the one we're waiting
2632 * for, we should process it now. It could (and currently always will)
2633 * be an open request for a descriptor that was opened some time ago.
2635 * Also, a resent, replayed request that has already been
2636 * handled will pass through here and be processed immediately.
2638 CDEBUG(D_HA, "Next recovery transno: "LPU64
2639 ", current: "LPU64", replaying\n",
2640 obd->obd_next_recovery_transno, transno);
2642 /* If the request has been replayed by update replay, then sends this
2643 * request to the recovery thread (replay_request_or_update()), where
2644 * it will be handled */
2645 spin_lock(&obd->obd_recovery_task_lock);
2646 if (transno < obd->obd_next_recovery_transno &&
2647 !is_req_replayed_by_update(req)) {
2648 /* Processing the queue right now, don't re-add. */
2649 LASSERT(list_empty(&req->rq_list));
2650 spin_unlock(&obd->obd_recovery_task_lock);
2653 spin_unlock(&obd->obd_recovery_task_lock);
2655 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))
2658 target_request_copy_get(req);
2659 if (!req->rq_export->exp_in_recovery) {
2660 target_request_copy_put(req);
2663 LASSERT(req->rq_export->exp_req_replay_needed);
2665 if (target_exp_enqueue_req_replay(req)) {
2666 DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
2667 target_request_copy_put(req);
2672 spin_lock(&obd->obd_recovery_task_lock);
2673 LASSERT(obd->obd_recovering);
2674 list_for_each_entry(reqiter, &obd->obd_req_replay_queue, rq_list) {
2675 if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) {
2676 list_add_tail(&req->rq_list, &reqiter->rq_list);
2681 if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) ==
2683 DEBUG_REQ(D_ERROR, req, "dropping replay: transno "
2684 "has been claimed by another client");
2685 spin_unlock(&obd->obd_recovery_task_lock);
2686 target_exp_dequeue_req_replay(req);
2687 target_request_copy_put(req);
2693 list_add_tail(&req->rq_list, &obd->obd_req_replay_queue);
2695 obd->obd_requests_queued_for_recovery++;
2696 spin_unlock(&obd->obd_recovery_task_lock);
2697 wake_up(&obd->obd_next_transno_waitq);
2701 int target_handle_ping(struct ptlrpc_request *req)
2703 obd_ping(req->rq_svc_thread->t_env, req->rq_export);
2704 return req_capsule_server_pack(&req->rq_pill);
2707 void target_committed_to_req(struct ptlrpc_request *req)
2709 struct obd_export *exp = req->rq_export;
2711 if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL)
2712 lustre_msg_set_last_committed(req->rq_repmsg,
2713 exp->exp_last_committed);
2715 DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/"
2716 "%d)", exp->exp_obd->obd_no_transno,
2717 req->rq_repmsg == NULL);
2719 CDEBUG(D_INFO, "last_committed "LPU64", transno "LPU64", xid "LPU64"\n",
2720 exp->exp_last_committed, req->rq_transno, req->rq_xid);
2723 #endif /* HAVE_SERVER_SUPPORT */
2726 * Packs current SLV and Limit into \a req.
2728 int target_pack_pool_reply(struct ptlrpc_request *req)
2730 struct obd_device *obd;
2733 /* Check that we still have all structures alive as this may
2734 * be some late RPC at shutdown time. */
2735 if (unlikely(!req->rq_export || !req->rq_export->exp_obd ||
2736 !exp_connect_lru_resize(req->rq_export))) {
2737 lustre_msg_set_slv(req->rq_repmsg, 0);
2738 lustre_msg_set_limit(req->rq_repmsg, 0);
2742 /* OBD is alive here as export is alive, which we checked above. */
2743 obd = req->rq_export->exp_obd;
2745 read_lock(&obd->obd_pool_lock);
2746 lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv);
2747 lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit);
2748 read_unlock(&obd->obd_pool_lock);
2753 static int target_send_reply_msg(struct ptlrpc_request *req,
2754 int rc, int fail_id)
2756 if (OBD_FAIL_CHECK_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) {
2757 DEBUG_REQ(D_ERROR, req, "dropping reply");
2760 if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
2761 OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET_REP)))
2765 DEBUG_REQ(D_NET, req, "processing error (%d)", rc);
2766 req->rq_status = rc;
2767 return ptlrpc_send_error(req, 1);
2769 DEBUG_REQ(D_NET, req, "sending reply");
2772 return ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
2775 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
2777 struct ptlrpc_service_part *svcpt;
2779 struct ptlrpc_reply_state *rs;
2780 struct obd_export *exp;
2783 if (req->rq_no_reply) {
2788 svcpt = req->rq_rqbd->rqbd_svcpt;
2789 rs = req->rq_reply_state;
2790 if (rs == NULL || !rs->rs_difficult) {
2792 target_send_reply_msg (req, rc, fail_id);
2797 /* must be an export if locks saved */
2798 LASSERT(req->rq_export != NULL);
2799 /* req/reply consistent */
2800 LASSERT(rs->rs_svcpt == svcpt);
2803 LASSERT(!rs->rs_scheduled);
2804 LASSERT(!rs->rs_scheduled_ever);
2805 LASSERT(!rs->rs_handled);
2806 LASSERT(!rs->rs_on_net);
2807 LASSERT(rs->rs_export == NULL);
2808 LASSERT(list_empty(&rs->rs_obd_list));
2809 LASSERT(list_empty(&rs->rs_exp_list));
2811 exp = class_export_get(req->rq_export);
2813 /* disable reply scheduling while I'm setting up */
2814 rs->rs_scheduled = 1;
2816 rs->rs_xid = req->rq_xid;
2817 rs->rs_transno = req->rq_transno;
2818 rs->rs_export = exp;
2819 rs->rs_opc = lustre_msg_get_opc(req->rq_reqmsg);
2821 spin_lock(&exp->exp_uncommitted_replies_lock);
2822 CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n",
2823 rs->rs_transno, exp->exp_last_committed);
2824 if (rs->rs_transno > exp->exp_last_committed) {
2825 /* not committed already */
2826 list_add_tail(&rs->rs_obd_list,
2827 &exp->exp_uncommitted_replies);
2829 spin_unlock(&exp->exp_uncommitted_replies_lock);
2831 spin_lock(&exp->exp_lock);
2832 list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies);
2833 spin_unlock(&exp->exp_lock);
2835 netrc = target_send_reply_msg(req, rc, fail_id);
2837 spin_lock(&svcpt->scp_rep_lock);
2839 atomic_inc(&svcpt->scp_nreps_difficult);
2842 /* error sending: reply is off the net. Also we need +1
2843 * reply ref until ptlrpc_handle_rs() is done
2844 * with the reply state (if the send was successful, there
2845 * would have been +1 ref for the net, which
2846 * reply_out_callback leaves alone) */
2848 ptlrpc_rs_addref(rs);
2851 spin_lock(&rs->rs_lock);
2852 if (rs->rs_transno <= exp->exp_last_committed ||
2853 (!rs->rs_on_net && !rs->rs_no_ack) ||
2854 list_empty(&rs->rs_exp_list) || /* completed already */
2855 list_empty(&rs->rs_obd_list)) {
2856 CDEBUG(D_HA, "Schedule reply immediately\n");
2857 ptlrpc_dispatch_difficult_reply(rs);
2859 list_add(&rs->rs_list, &svcpt->scp_rep_active);
2860 rs->rs_scheduled = 0; /* allow notifier to schedule */
2862 spin_unlock(&rs->rs_lock);
2863 spin_unlock(&svcpt->scp_rep_lock);
2867 enum ldlm_mode lck_compat_array[] = {
2868 [LCK_EX] = LCK_COMPAT_EX,
2869 [LCK_PW] = LCK_COMPAT_PW,
2870 [LCK_PR] = LCK_COMPAT_PR,
2871 [LCK_CW] = LCK_COMPAT_CW,
2872 [LCK_CR] = LCK_COMPAT_CR,
2873 [LCK_NL] = LCK_COMPAT_NL,
2874 [LCK_GROUP] = LCK_COMPAT_GROUP,
2875 [LCK_COS] = LCK_COMPAT_COS,
2879 * Rather arbitrary mapping from LDLM error codes to errno values. This should
2880 * not escape to the user level.
2882 int ldlm_error2errno(enum ldlm_error error)
2888 case ELDLM_LOCK_MATCHED:
2891 case ELDLM_LOCK_CHANGED:
2894 case ELDLM_LOCK_ABORTED:
2897 case ELDLM_LOCK_REPLACED:
2900 case ELDLM_NO_LOCK_DATA:
2903 case ELDLM_NAMESPACE_EXISTS:
2906 case ELDLM_BAD_NAMESPACE:
2910 if (((int)error) < 0) { /* cast to signed type */
2911 result = error; /* as ldlm_error can be unsigned */
2913 CERROR("Invalid DLM result code: %d\n", error);
2919 EXPORT_SYMBOL(ldlm_error2errno);
2922 * Dual to ldlm_error2errno(): maps errno values back to enum ldlm_error.
2924 enum ldlm_error ldlm_errno2error(int err_no)
2933 error = ELDLM_LOCK_CHANGED;
2936 error = ELDLM_LOCK_ABORTED;
2939 error = ELDLM_LOCK_REPLACED;
2942 error = ELDLM_NO_LOCK_DATA;
2945 error = ELDLM_NAMESPACE_EXISTS;
2948 error = ELDLM_BAD_NAMESPACE;
2956 #if LUSTRE_TRACKS_LOCK_EXP_REFS
2957 void ldlm_dump_export_locks(struct obd_export *exp)
2959 spin_lock(&exp->exp_locks_list_guard);
2960 if (!list_empty(&exp->exp_locks_list)) {
2961 struct ldlm_lock *lock;
2963 CERROR("dumping locks for export %p,"
2964 "ignore if the unmount doesn't hang\n", exp);
2965 list_for_each_entry(lock, &exp->exp_locks_list,
2967 LDLM_ERROR(lock, "lock:");
2969 spin_unlock(&exp->exp_locks_list_guard);
2973 #ifdef HAVE_SERVER_SUPPORT
2974 static int target_bulk_timeout(void *data)
2977 /* We don't fail the connection here, because having the export
2978 * killed makes the (vital) call to commitrw very sad.
2983 static inline const char *bulk2type(struct ptlrpc_request *req)
2985 if (req->rq_bulk_read)
2987 if (req->rq_bulk_write)
2992 int target_bulk_io(struct obd_export *exp, struct ptlrpc_bulk_desc *desc,
2993 struct l_wait_info *lwi)
2995 struct ptlrpc_request *req = desc->bd_req;
2996 time_t start = cfs_time_current_sec();
3002 /* If there is eviction in progress, wait for it to finish. */
3003 if (unlikely(atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
3004 *lwi = LWI_INTR(NULL, NULL);
3005 rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
3006 !atomic_read(&exp->exp_obd->
3007 obd_evict_inprogress),
3011 /* Check if client was evicted or reconnected already. */
3012 if (exp->exp_failed ||
3013 exp->exp_conn_cnt > lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3016 if (req->rq_bulk_read)
3017 rc = sptlrpc_svc_wrap_bulk(req, desc);
3019 if ((exp->exp_connect_data.ocd_connect_flags &
3020 OBD_CONNECT_BULK_MBITS) != 0)
3021 req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
3022 else /* old version, bulk matchbits is rq_xid */
3023 req->rq_mbits = req->rq_xid;
3026 rc = ptlrpc_start_bulk_transfer(desc);
3030 DEBUG_REQ(D_ERROR, req, "bulk %s failed: rc %d",
3031 bulk2type(req), rc);
3035 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE)) {
3036 ptlrpc_abort_bulk(desc);
3040 /* limit actual bulk transfer to bulk_timeout seconds */
3041 deadline = start + bulk_timeout;
3042 if (deadline > req->rq_deadline)
3043 deadline = req->rq_deadline;
3046 long timeoutl = deadline - cfs_time_current_sec();
3047 cfs_duration_t timeout = timeoutl <= 0 ?
3048 CFS_TICK : cfs_time_seconds(timeoutl);
3051 *lwi = LWI_TIMEOUT_INTERVAL(timeout, cfs_time_seconds(1),
3052 target_bulk_timeout, desc);
3053 rc = l_wait_event(desc->bd_waitq,
3054 !ptlrpc_server_bulk_active(desc) ||
3057 lustre_msg_get_conn_cnt(req->rq_reqmsg),
3059 LASSERT(rc == 0 || rc == -ETIMEDOUT);
3060 /* Wait again if we changed rq_deadline. */
3061 rq_deadline = ACCESS_ONCE(req->rq_deadline);
3062 deadline = start + bulk_timeout;
3063 if (deadline > rq_deadline)
3064 deadline = rq_deadline;
3065 } while ((rc == -ETIMEDOUT) &&
3066 (deadline > cfs_time_current_sec()));
3068 if (rc == -ETIMEDOUT) {
3069 DEBUG_REQ(D_ERROR, req, "timeout on bulk %s after %ld%+lds",
3070 bulk2type(req), deadline - start,
3071 cfs_time_current_sec() - deadline);
3072 ptlrpc_abort_bulk(desc);
3073 } else if (exp->exp_failed) {
3074 DEBUG_REQ(D_ERROR, req, "Eviction on bulk %s",
3077 ptlrpc_abort_bulk(desc);
3078 } else if (exp->exp_conn_cnt >
3079 lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
3080 DEBUG_REQ(D_ERROR, req, "Reconnect on bulk %s",
3082 /* We don't reply anyway. */
3084 ptlrpc_abort_bulk(desc);
3085 } else if (desc->bd_failure) {
3086 DEBUG_REQ(D_ERROR, req, "network error on bulk %s",
3088 /* XXX should this be a different errno? */
3091 if (req->rq_bulk_write)
3092 rc = sptlrpc_svc_unwrap_bulk(req, desc);
3093 if (rc == 0 && desc->bd_nob_transferred != desc->bd_nob) {
3094 DEBUG_REQ(D_ERROR, req, "truncated bulk %s %d(%d)",
3095 bulk2type(req), desc->bd_nob_transferred,
3097 /* XXX should this be a different errno? */
3104 EXPORT_SYMBOL(target_bulk_io);
3106 #endif /* HAVE_SERVER_SUPPORT */