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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Lustre Unified Target
37 * These are common function to work with last_received file
39 * Author: Mikhail Pershin <mike.pershin@intel.com>
42 #include <obd_class.h>
43 #include <lustre_fid.h>
45 #include "tgt_internal.h"
47 static inline struct lu_buf *tti_buf_lsd(struct tgt_thread_info *tti)
49 tti->tti_buf.lb_buf = &tti->tti_lsd;
50 tti->tti_buf.lb_len = sizeof(tti->tti_lsd);
54 static inline struct lu_buf *tti_buf_lcd(struct tgt_thread_info *tti)
56 tti->tti_buf.lb_buf = &tti->tti_lcd;
57 tti->tti_buf.lb_len = sizeof(tti->tti_lcd);
62 * Allocate in-memory data for client slot related to export.
64 int tgt_client_alloc(struct obd_export *exp)
67 LASSERT(exp != exp->exp_obd->obd_self_export);
69 OBD_ALLOC_PTR(exp->exp_target_data.ted_lcd);
70 if (exp->exp_target_data.ted_lcd == NULL)
72 /* Mark that slot is not yet valid, 0 doesn't work here */
73 exp->exp_target_data.ted_lr_idx = -1;
76 EXPORT_SYMBOL(tgt_client_alloc);
79 * Free in-memory data for client slot related to export.
81 void tgt_client_free(struct obd_export *exp)
83 struct tg_export_data *ted = &exp->exp_target_data;
84 struct lu_target *lut = class_exp2tgt(exp);
86 LASSERT(exp != exp->exp_obd->obd_self_export);
88 OBD_FREE_PTR(ted->ted_lcd);
91 /* Slot may be not yet assigned */
92 if (ted->ted_lr_idx < 0)
94 /* Clear bit when lcd is freed */
95 LASSERT(lut->lut_client_bitmap);
96 if (!test_and_clear_bit(ted->ted_lr_idx, lut->lut_client_bitmap)) {
97 CERROR("%s: client %u bit already clear in bitmap\n",
98 exp->exp_obd->obd_name, ted->ted_lr_idx);
102 EXPORT_SYMBOL(tgt_client_free);
104 int tgt_client_data_read(const struct lu_env *env, struct lu_target *tgt,
105 struct lsd_client_data *lcd, loff_t *off, int index)
107 struct tgt_thread_info *tti = tgt_th_info(env);
111 rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf, off);
113 check_lcd(tgt->lut_obd->obd_name, index, &tti->tti_lcd);
114 lcd_le_to_cpu(&tti->tti_lcd, lcd);
115 lcd->lcd_last_result = ptlrpc_status_ntoh(lcd->lcd_last_result);
116 lcd->lcd_last_close_result =
117 ptlrpc_status_ntoh(lcd->lcd_last_close_result);
120 CDEBUG(D_INFO, "%s: read lcd @%lld uuid = %s, last_transno = "LPU64
121 ", last_xid = "LPU64", last_result = %u, last_data = %u, "
122 "last_close_transno = "LPU64", last_close_xid = "LPU64", "
123 "last_close_result = %u, rc = %d\n", tgt->lut_obd->obd_name,
124 *off, lcd->lcd_uuid, lcd->lcd_last_transno, lcd->lcd_last_xid,
125 lcd->lcd_last_result, lcd->lcd_last_data,
126 lcd->lcd_last_close_transno, lcd->lcd_last_close_xid,
127 lcd->lcd_last_close_result, rc);
130 EXPORT_SYMBOL(tgt_client_data_read);
132 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tgt,
133 struct lsd_client_data *lcd, loff_t *off,
136 struct tgt_thread_info *tti = tgt_th_info(env);
138 lcd->lcd_last_result = ptlrpc_status_hton(lcd->lcd_last_result);
139 lcd->lcd_last_close_result =
140 ptlrpc_status_hton(lcd->lcd_last_close_result);
141 lcd_cpu_to_le(lcd, &tti->tti_lcd);
144 return dt_record_write(env, tgt->lut_last_rcvd, &tti->tti_buf, off, th);
146 EXPORT_SYMBOL(tgt_client_data_write);
149 * Update client data in last_rcvd
151 static int tgt_client_data_update(const struct lu_env *env,
152 struct obd_export *exp)
154 struct tg_export_data *ted = &exp->exp_target_data;
155 struct lu_target *tgt = class_exp2tgt(exp);
156 struct tgt_thread_info *tti = tgt_th_info(env);
162 th = dt_trans_create(env, tgt->lut_bottom);
167 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
169 ted->ted_lr_off, th);
173 rc = dt_trans_start_local(env, tgt->lut_bottom, th);
177 * Until this operations will be committed the sync is needed
178 * for this export. This should be done _after_ starting the
179 * transaction so that many connecting clients will not bring
180 * server down with lots of sync writes.
182 rc = tgt_new_client_cb_add(th, exp);
184 /* can't add callback, do sync now */
187 spin_lock(&exp->exp_lock);
188 exp->exp_need_sync = 1;
189 spin_unlock(&exp->exp_lock);
192 tti->tti_off = ted->ted_lr_off;
193 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
196 dt_trans_stop(env, tgt->lut_bottom, th);
197 CDEBUG(D_INFO, "%s: update last_rcvd client data for UUID = %s, "
198 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
199 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
204 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tgt)
206 struct tgt_thread_info *tti = tgt_th_info(env);
211 rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf,
214 lsd_le_to_cpu(&tti->tti_lsd, &tgt->lut_lsd);
216 CDEBUG(D_INFO, "%s: read last_rcvd server data for UUID = %s, "
217 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
218 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
221 EXPORT_SYMBOL(tgt_server_data_read);
223 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tgt,
226 struct tgt_thread_info *tti = tgt_th_info(env);
233 lsd_cpu_to_le(&tgt->lut_lsd, &tti->tti_lsd);
235 rc = dt_record_write(env, tgt->lut_last_rcvd, &tti->tti_buf,
238 CDEBUG(D_INFO, "%s: write last_rcvd server data for UUID = %s, "
239 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
240 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
244 EXPORT_SYMBOL(tgt_server_data_write);
247 * Update server data in last_rcvd
249 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tgt,
252 struct tgt_thread_info *tti = tgt_th_info(env);
259 "%s: mount_count is "LPU64", last_transno is "LPU64"\n",
260 tgt->lut_lsd.lsd_uuid, tgt->lut_obd->u.obt.obt_mount_count,
261 tgt->lut_last_transno);
263 /* Always save latest transno to keep it fresh */
264 spin_lock(&tgt->lut_translock);
265 tgt->lut_lsd.lsd_last_transno = tgt->lut_last_transno;
266 spin_unlock(&tgt->lut_translock);
268 th = dt_trans_create(env, tgt->lut_bottom);
275 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
276 &tti->tti_buf, tti->tti_off, th);
280 rc = dt_trans_start(env, tgt->lut_bottom, th);
284 rc = tgt_server_data_write(env, tgt, th);
286 dt_trans_stop(env, tgt->lut_bottom, th);
288 CDEBUG(D_INFO, "%s: update last_rcvd server data for UUID = %s, "
289 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
290 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
293 EXPORT_SYMBOL(tgt_server_data_update);
295 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tgt,
298 struct dt_object *dt = tgt->lut_last_rcvd;
306 attr.la_valid = LA_SIZE;
308 th = dt_trans_create(env, tgt->lut_bottom);
311 rc = dt_declare_punch(env, dt, size, OBD_OBJECT_EOF, th);
314 rc = dt_declare_attr_set(env, dt, &attr, th);
317 rc = dt_trans_start_local(env, tgt->lut_bottom, th);
321 rc = dt_punch(env, dt, size, OBD_OBJECT_EOF, th, BYPASS_CAPA);
323 rc = dt_attr_set(env, dt, &attr, th, BYPASS_CAPA);
326 dt_trans_stop(env, tgt->lut_bottom, th);
330 EXPORT_SYMBOL(tgt_truncate_last_rcvd);
332 static void tgt_client_epoch_update(const struct lu_env *env,
333 struct obd_export *exp)
335 struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
336 struct lu_target *tgt = class_exp2tgt(exp);
338 LASSERT(tgt->lut_bottom);
339 /** VBR: set client last_epoch to current epoch */
340 if (lcd->lcd_last_epoch >= tgt->lut_lsd.lsd_start_epoch)
342 lcd->lcd_last_epoch = tgt->lut_lsd.lsd_start_epoch;
343 tgt_client_data_update(env, exp);
347 * Update boot epoch when recovery ends
349 void tgt_boot_epoch_update(struct lu_target *tgt)
352 struct ptlrpc_request *req;
354 struct list_head client_list;
357 if (tgt->lut_obd->obd_stopping)
360 rc = lu_env_init(&env, LCT_DT_THREAD);
362 CERROR("%s: can't initialize environment: rc = %d\n",
363 tgt->lut_obd->obd_name, rc);
367 spin_lock(&tgt->lut_translock);
368 start_epoch = lr_epoch(tgt->lut_last_transno) + 1;
369 tgt->lut_last_transno = (__u64)start_epoch << LR_EPOCH_BITS;
370 tgt->lut_lsd.lsd_start_epoch = start_epoch;
371 spin_unlock(&tgt->lut_translock);
373 INIT_LIST_HEAD(&client_list);
375 * The recovery is not yet finished and final queue can still be updated
376 * with resend requests. Move final list to separate one for processing
378 spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
379 list_splice_init(&tgt->lut_obd->obd_final_req_queue, &client_list);
380 spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
383 * go through list of exports participated in recovery and
384 * set new epoch for them
386 list_for_each_entry(req, &client_list, rq_list) {
387 LASSERT(!req->rq_export->exp_delayed);
388 if (!req->rq_export->exp_vbr_failed)
389 tgt_client_epoch_update(&env, req->rq_export);
391 /** return list back at once */
392 spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
393 list_splice_init(&client_list, &tgt->lut_obd->obd_final_req_queue);
394 spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
395 /** update server epoch */
396 tgt_server_data_update(&env, tgt, 1);
399 EXPORT_SYMBOL(tgt_boot_epoch_update);
402 * commit callback, need to update last_commited value
404 struct tgt_last_committed_callback {
405 struct dt_txn_commit_cb llcc_cb;
406 struct lu_target *llcc_tgt;
407 struct obd_export *llcc_exp;
411 static void tgt_cb_last_committed(struct lu_env *env, struct thandle *th,
412 struct dt_txn_commit_cb *cb, int err)
414 struct tgt_last_committed_callback *ccb;
416 ccb = container_of0(cb, struct tgt_last_committed_callback, llcc_cb);
418 LASSERT(ccb->llcc_tgt != NULL);
419 LASSERT(ccb->llcc_exp->exp_obd == ccb->llcc_tgt->lut_obd);
421 spin_lock(&ccb->llcc_tgt->lut_translock);
422 if (ccb->llcc_transno > ccb->llcc_tgt->lut_obd->obd_last_committed)
423 ccb->llcc_tgt->lut_obd->obd_last_committed = ccb->llcc_transno;
425 LASSERT(ccb->llcc_exp);
426 if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
427 ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
428 spin_unlock(&ccb->llcc_tgt->lut_translock);
429 ptlrpc_commit_replies(ccb->llcc_exp);
431 spin_unlock(&ccb->llcc_tgt->lut_translock);
433 class_export_cb_put(ccb->llcc_exp);
434 if (ccb->llcc_transno)
435 CDEBUG(D_HA, "%s: transno "LPD64" is committed\n",
436 ccb->llcc_tgt->lut_obd->obd_name, ccb->llcc_transno);
440 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *tgt,
441 struct obd_export *exp, __u64 transno)
443 struct tgt_last_committed_callback *ccb;
444 struct dt_txn_commit_cb *dcb;
452 ccb->llcc_exp = class_export_cb_get(exp);
453 ccb->llcc_transno = transno;
456 dcb->dcb_func = tgt_cb_last_committed;
457 INIT_LIST_HEAD(&dcb->dcb_linkage);
458 strlcpy(dcb->dcb_name, "tgt_cb_last_committed", sizeof(dcb->dcb_name));
460 rc = dt_trans_cb_add(th, dcb);
462 class_export_cb_put(exp);
466 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
467 /* report failure to force synchronous operation */
472 EXPORT_SYMBOL(tgt_last_commit_cb_add);
474 struct tgt_new_client_callback {
475 struct dt_txn_commit_cb lncc_cb;
476 struct obd_export *lncc_exp;
479 static void tgt_cb_new_client(struct lu_env *env, struct thandle *th,
480 struct dt_txn_commit_cb *cb, int err)
482 struct tgt_new_client_callback *ccb;
484 ccb = container_of0(cb, struct tgt_new_client_callback, lncc_cb);
486 LASSERT(ccb->lncc_exp->exp_obd);
488 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
489 ccb->lncc_exp->exp_obd->obd_name,
490 ccb->lncc_exp->exp_client_uuid.uuid);
492 spin_lock(&ccb->lncc_exp->exp_lock);
493 /* XXX: Currently, we use per-export based sync/async policy for
494 * the update via OUT RPC, it is coarse-grained policy, and
495 * will be changed as per-request based by DNE II patches. */
496 if (!ccb->lncc_exp->exp_keep_sync)
497 ccb->lncc_exp->exp_need_sync = 0;
499 spin_unlock(&ccb->lncc_exp->exp_lock);
500 class_export_cb_put(ccb->lncc_exp);
505 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp)
507 struct tgt_new_client_callback *ccb;
508 struct dt_txn_commit_cb *dcb;
515 ccb->lncc_exp = class_export_cb_get(exp);
518 dcb->dcb_func = tgt_cb_new_client;
519 INIT_LIST_HEAD(&dcb->dcb_linkage);
520 strlcpy(dcb->dcb_name, "tgt_cb_new_client", sizeof(dcb->dcb_name));
522 rc = dt_trans_cb_add(th, dcb);
524 class_export_cb_put(exp);
531 * Add new client to the last_rcvd upon new connection.
533 * We use a bitmap to locate a free space in the last_rcvd file and initialize
536 int tgt_client_new(const struct lu_env *env, struct obd_export *exp)
538 struct tg_export_data *ted = &exp->exp_target_data;
539 struct lu_target *tgt = class_exp2tgt(exp);
544 LASSERT(tgt->lut_client_bitmap != NULL);
545 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid))
548 mutex_init(&ted->ted_lcd_lock);
550 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
553 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
554 * there's no need for extra complication here
556 idx = find_first_zero_bit(tgt->lut_client_bitmap, LR_MAX_CLIENTS);
558 if (idx >= LR_MAX_CLIENTS ||
559 OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
560 CERROR("%s: no room for %u clients - fix LR_MAX_CLIENTS\n",
561 tgt->lut_obd->obd_name, idx);
564 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
565 idx = find_next_zero_bit(tgt->lut_client_bitmap,
566 LR_MAX_CLIENTS, idx);
570 CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
571 tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
573 ted->ted_lr_idx = idx;
574 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
575 idx * tgt->lut_lsd.lsd_client_size;
577 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
579 CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s'\n",
580 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
581 ted->ted_lcd->lcd_uuid);
583 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
586 rc = tgt_client_data_update(env, exp);
588 CERROR("%s: Failed to write client lcd at idx %d, rc %d\n",
589 tgt->lut_obd->obd_name, idx, rc);
593 EXPORT_SYMBOL(tgt_client_new);
595 /* Add client data to the MDS. We use a bitmap to locate a free space
596 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
597 * Otherwise, we just have to read the data from the last_rcvd file and
598 * we know its offset.
600 * It should not be possible to fail adding an existing client - otherwise
601 * mdt_init_server_data() callsite needs to be fixed.
603 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int idx)
605 struct tg_export_data *ted = &exp->exp_target_data;
606 struct lu_target *tgt = class_exp2tgt(exp);
610 LASSERT(tgt->lut_client_bitmap != NULL);
611 LASSERTF(idx >= 0, "%d\n", idx);
613 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid) ||
614 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
617 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
618 CERROR("%s: client %d: bit already set in bitmap!!\n",
619 tgt->lut_obd->obd_name, idx);
623 CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
624 tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
626 ted->ted_lr_idx = idx;
627 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
628 idx * tgt->lut_lsd.lsd_client_size;
630 mutex_init(&ted->ted_lcd_lock);
632 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
636 EXPORT_SYMBOL(tgt_client_add);
638 int tgt_client_del(const struct lu_env *env, struct obd_export *exp)
640 struct tg_export_data *ted = &exp->exp_target_data;
641 struct lu_target *tgt = class_exp2tgt(exp);
646 LASSERT(ted->ted_lcd);
648 /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
649 if (!strcmp((char *)ted->ted_lcd->lcd_uuid,
650 (char *)tgt->lut_obd->obd_uuid.uuid) ||
651 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
654 CDEBUG(D_INFO, "%s: del client at idx %u, off %lld, UUID '%s'\n",
655 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
656 ted->ted_lcd->lcd_uuid);
658 /* Clear the bit _after_ zeroing out the client so we don't
659 race with filter_client_add and zero out new clients.*/
660 if (!test_bit(ted->ted_lr_idx, tgt->lut_client_bitmap)) {
661 CERROR("%s: client %u: bit already clear in bitmap!!\n",
662 tgt->lut_obd->obd_name, ted->ted_lr_idx);
666 /* Do not erase record for recoverable client. */
667 if (exp->exp_flags & OBD_OPT_FAILOVER)
670 /* Make sure the server's last_transno is up to date.
671 * This should be done before zeroing client slot so last_transno will
672 * be in server data or in client data in case of failure */
673 rc = tgt_server_data_update(env, tgt, 0);
675 CERROR("%s: failed to update server data, skip client %s "
676 "zeroing, rc %d\n", tgt->lut_obd->obd_name,
677 ted->ted_lcd->lcd_uuid, rc);
681 mutex_lock(&ted->ted_lcd_lock);
682 memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
683 rc = tgt_client_data_update(env, exp);
684 mutex_unlock(&ted->ted_lcd_lock);
686 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
687 "%s: zeroing out client %s at idx %u (%llu), rc %d\n",
688 tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid,
689 ted->ted_lr_idx, ted->ted_lr_off, rc);
692 EXPORT_SYMBOL(tgt_client_del);
695 * last_rcvd & last_committed update callbacks
697 static int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
698 struct dt_object *obj, __u64 opdata,
699 struct thandle *th, struct ptlrpc_request *req)
701 struct tgt_thread_info *tti = tgt_th_info(env);
702 struct tg_export_data *ted;
705 bool lw_client, update = false;
709 ted = &req->rq_export->exp_target_data;
711 lw_client = exp_connect_flags(req->rq_export) & OBD_CONNECT_LIGHTWEIGHT;
712 if (ted->ted_lr_idx < 0 && !lw_client)
713 /* ofd connect may cause transaction before export has
717 tti->tti_transno = lustre_msg_get_transno(req->rq_reqmsg);
719 spin_lock(&tgt->lut_translock);
720 if (th->th_result != 0) {
721 if (tti->tti_transno != 0) {
722 CERROR("%s: replay transno "LPU64" failed: rc = %d\n",
723 tgt_name(tgt), tti->tti_transno, th->th_result);
725 } else if (tti->tti_transno == 0) {
726 tti->tti_transno = ++tgt->lut_last_transno;
728 /* should be replay */
729 if (tti->tti_transno > tgt->lut_last_transno)
730 tgt->lut_last_transno = tti->tti_transno;
732 spin_unlock(&tgt->lut_translock);
734 /** VBR: set new versions */
735 if (th->th_result == 0 && obj != NULL)
736 dt_version_set(env, obj, tti->tti_transno, th);
738 /* filling reply data */
739 CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n",
740 tti->tti_transno, tgt->lut_obd->obd_last_committed);
742 req->rq_transno = tti->tti_transno;
743 lustre_msg_set_transno(req->rq_repmsg, tti->tti_transno);
745 /* if can't add callback, do sync write */
746 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, req->rq_export,
750 /* All operations performed by LW clients are synchronous and
751 * we store the committed transno in the last_rcvd header */
752 spin_lock(&tgt->lut_translock);
753 if (tti->tti_transno > tgt->lut_lsd.lsd_last_transno) {
754 tgt->lut_lsd.lsd_last_transno = tti->tti_transno;
757 spin_unlock(&tgt->lut_translock);
758 /* Although lightweight (LW) connections have no slot in
759 * last_rcvd, we still want to maintain the in-memory
760 * lsd_client_data structure in order to properly handle reply
762 } else if (ted->ted_lr_off == 0) {
763 CERROR("%s: client idx %d has offset %lld\n",
764 tgt_name(tgt), ted->ted_lr_idx, ted->ted_lr_off);
768 /* if the export has already been disconnected, we have no last_rcvd
769 * slot, update server data with latest transno then */
770 if (ted->ted_lcd == NULL) {
771 CWARN("commit transaction for disconnected client %s: rc %d\n",
772 req->rq_export->exp_client_uuid.uuid, rc);
773 GOTO(srv_update, rc = 0);
776 mutex_lock(&ted->ted_lcd_lock);
777 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
778 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE ||
779 lustre_msg_get_opc(req->rq_reqmsg) == MDS_DONE_WRITING) {
780 transno_p = &ted->ted_lcd->lcd_last_close_transno;
781 ted->ted_lcd->lcd_last_close_xid = req->rq_xid;
782 ted->ted_lcd->lcd_last_close_result = th->th_result;
784 /* VBR: save versions in last_rcvd for reconstruct. */
785 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
788 ted->ted_lcd->lcd_pre_versions[0] = pre_versions[0];
789 ted->ted_lcd->lcd_pre_versions[1] = pre_versions[1];
790 ted->ted_lcd->lcd_pre_versions[2] = pre_versions[2];
791 ted->ted_lcd->lcd_pre_versions[3] = pre_versions[3];
793 transno_p = &ted->ted_lcd->lcd_last_transno;
794 ted->ted_lcd->lcd_last_xid = req->rq_xid;
795 ted->ted_lcd->lcd_last_result = th->th_result;
796 /* XXX: lcd_last_data is __u32 but intent_dispostion is __u64,
797 * see struct ldlm_reply->lock_policy_res1; */
798 ted->ted_lcd->lcd_last_data = opdata;
801 /* Update transno in slot only if non-zero number, i.e. no errors */
802 if (likely(tti->tti_transno != 0)) {
803 if (*transno_p > tti->tti_transno &&
804 !tgt->lut_no_reconstruct) {
805 CERROR("%s: trying to overwrite bigger transno:"
806 "on-disk: "LPU64", new: "LPU64" replay: %d. "
807 "see LU-617.\n", tgt_name(tgt), *transno_p,
808 tti->tti_transno, req_is_replay(req));
809 if (req_is_replay(req)) {
810 spin_lock(&req->rq_export->exp_lock);
811 req->rq_export->exp_vbr_failed = 1;
812 spin_unlock(&req->rq_export->exp_lock);
814 mutex_unlock(&ted->ted_lcd_lock);
815 RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
817 *transno_p = tti->tti_transno;
821 tti->tti_off = ted->ted_lr_off;
822 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
824 mutex_unlock(&ted->ted_lcd_lock);
828 mutex_unlock(&ted->ted_lcd_lock);
832 rc = tgt_server_data_write(env, tgt, th);
837 * last_rcvd update for echo client simulation.
838 * It updates last_rcvd client slot and version of object in
839 * simple way but with all locks to simulate all drawbacks
841 static int tgt_last_rcvd_update_echo(const struct lu_env *env,
842 struct lu_target *tgt,
843 struct dt_object *obj,
845 struct obd_export *exp)
847 struct tgt_thread_info *tti = tgt_th_info(env);
848 struct tg_export_data *ted = &exp->exp_target_data;
853 tti->tti_transno = 0;
855 spin_lock(&tgt->lut_translock);
856 if (th->th_result == 0)
857 tti->tti_transno = ++tgt->lut_last_transno;
858 spin_unlock(&tgt->lut_translock);
860 /** VBR: set new versions */
861 if (th->th_result == 0 && obj != NULL)
862 dt_version_set(env, obj, tti->tti_transno, th);
864 /* if can't add callback, do sync write */
865 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp,
868 LASSERT(ted->ted_lr_off > 0);
870 mutex_lock(&ted->ted_lcd_lock);
871 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
872 ted->ted_lcd->lcd_last_transno = tti->tti_transno;
873 ted->ted_lcd->lcd_last_result = th->th_result;
875 tti->tti_off = ted->ted_lr_off;
876 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
877 mutex_unlock(&ted->ted_lcd_lock);
881 static int tgt_clients_data_init(const struct lu_env *env,
882 struct lu_target *tgt,
883 unsigned long last_size)
885 struct obd_device *obd = tgt->lut_obd;
886 struct lr_server_data *lsd = &tgt->lut_lsd;
887 struct lsd_client_data *lcd = NULL;
888 struct tg_export_data *ted;
891 loff_t off = lsd->lsd_client_start;
895 CLASSERT(offsetof(struct lsd_client_data, lcd_padding) +
896 sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
902 for (cl_idx = 0; off < last_size; cl_idx++) {
903 struct obd_export *exp;
906 /* Don't assume off is incremented properly by
907 * read_record(), in case sizeof(*lcd)
908 * isn't the same as fsd->lsd_client_size. */
909 off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
910 rc = tgt_client_data_read(env, tgt, lcd, &off, cl_idx);
912 CERROR("%s: error reading last_rcvd %s idx %d off "
913 "%llu: rc = %d\n", tgt_name(tgt), LAST_RCVD,
916 break; /* read error shouldn't cause startup to fail */
919 if (lcd->lcd_uuid[0] == '\0') {
920 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
925 last_transno = lcd_last_transno(lcd);
927 /* These exports are cleaned up by disconnect, so they
928 * need to be set up like real exports as connect does.
930 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
931 " srv lr: "LPU64" lx: "LPU64"\n", lcd->lcd_uuid, cl_idx,
932 last_transno, lsd->lsd_last_transno, lcd_last_xid(lcd));
934 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
936 if (PTR_ERR(exp) == -EALREADY) {
937 /* export already exists, zero out this one */
938 CERROR("%s: Duplicate export %s!\n",
939 tgt_name(tgt), lcd->lcd_uuid);
942 GOTO(err_out, rc = PTR_ERR(exp));
945 ted = &exp->exp_target_data;
946 *ted->ted_lcd = *lcd;
948 rc = tgt_client_add(env, exp, cl_idx);
949 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
950 /* VBR: set export last committed version */
951 exp->exp_last_committed = last_transno;
952 spin_lock(&exp->exp_lock);
953 exp->exp_connecting = 0;
954 exp->exp_in_recovery = 0;
955 spin_unlock(&exp->exp_lock);
956 obd->obd_max_recoverable_clients++;
957 class_export_put(exp);
959 /* Need to check last_rcvd even for duplicated exports. */
960 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
961 cl_idx, last_transno);
963 spin_lock(&tgt->lut_translock);
964 tgt->lut_last_transno = max(last_transno,
965 tgt->lut_last_transno);
966 spin_unlock(&tgt->lut_translock);
974 struct server_compat_data {
981 static struct server_compat_data tgt_scd[] = {
982 [LDD_F_SV_TYPE_MDT] = {
983 .rocompat = OBD_ROCOMPAT_LOVOBJID,
984 .incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
985 OBD_INCOMPAT_FID | OBD_INCOMPAT_IAM_DIR |
986 OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI,
987 .rocinit = OBD_ROCOMPAT_LOVOBJID,
988 .incinit = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
989 OBD_INCOMPAT_MULTI_OI,
991 [LDD_F_SV_TYPE_OST] = {
993 .incompat = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR |
996 .incinit = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR,
1000 int tgt_server_data_init(const struct lu_env *env, struct lu_target *tgt)
1002 struct tgt_thread_info *tti = tgt_th_info(env);
1003 struct lr_server_data *lsd = &tgt->lut_lsd;
1004 unsigned long last_rcvd_size;
1008 rc = dt_attr_get(env, tgt->lut_last_rcvd, &tti->tti_attr, BYPASS_CAPA);
1012 last_rcvd_size = (unsigned long)tti->tti_attr.la_size;
1014 /* ensure padding in the struct is the correct size */
1015 CLASSERT(offsetof(struct lr_server_data, lsd_padding) +
1016 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
1018 rc = server_name2index(tgt_name(tgt), &index, NULL);
1020 CERROR("%s: Can not get index from name: rc = %d\n",
1024 /* server_name2index() returns type */
1026 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST) {
1027 CERROR("%s: unknown target type %x\n", tgt_name(tgt), type);
1031 /* last_rcvd on OST doesn't provide reconstruct support because there
1032 * may be up to 8 in-flight write requests per single slot in
1033 * last_rcvd client data
1035 tgt->lut_no_reconstruct = (type == LDD_F_SV_TYPE_OST);
1037 if (last_rcvd_size == 0) {
1038 LCONSOLE_WARN("%s: new disk, initializing\n", tgt_name(tgt));
1040 memcpy(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid,
1041 sizeof(lsd->lsd_uuid));
1042 lsd->lsd_last_transno = 0;
1043 lsd->lsd_mount_count = 0;
1044 lsd->lsd_server_size = LR_SERVER_SIZE;
1045 lsd->lsd_client_start = LR_CLIENT_START;
1046 lsd->lsd_client_size = LR_CLIENT_SIZE;
1047 lsd->lsd_subdir_count = OBJ_SUBDIR_COUNT;
1048 lsd->lsd_osd_index = index;
1049 lsd->lsd_feature_rocompat = tgt_scd[type].rocinit;
1050 lsd->lsd_feature_incompat = tgt_scd[type].incinit;
1052 rc = tgt_server_data_read(env, tgt);
1054 CERROR("%s: error reading LAST_RCVD: rc= %d\n",
1058 if (strcmp(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid)) {
1059 LCONSOLE_ERROR_MSG(0x157, "Trying to start OBD %s "
1060 "using the wrong disk %s. Were the"
1061 " /dev/ assignments rearranged?\n",
1062 tgt->lut_obd->obd_uuid.uuid,
1067 if (lsd->lsd_osd_index != index) {
1068 LCONSOLE_ERROR_MSG(0x157, "%s: index %d in last rcvd "
1069 "is different with the index %d in"
1070 "config log, It might be disk"
1071 "corruption!\n", tgt_name(tgt),
1072 lsd->lsd_osd_index, index);
1077 if (lsd->lsd_feature_incompat & ~tgt_scd[type].incompat) {
1078 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
1080 lsd->lsd_feature_incompat & ~tgt_scd[type].incompat);
1084 if (type == LDD_F_SV_TYPE_MDT)
1085 lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID;
1087 if (lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat) {
1088 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
1090 lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat);
1093 /** Interop: evict all clients at first boot with 1.8 last_rcvd */
1094 if (type == LDD_F_SV_TYPE_MDT &&
1095 !(lsd->lsd_feature_compat & OBD_COMPAT_20)) {
1096 if (last_rcvd_size > lsd->lsd_client_start) {
1097 LCONSOLE_WARN("%s: mounting at first time on 1.8 FS, "
1098 "remove all clients for interop needs\n",
1100 rc = tgt_truncate_last_rcvd(env, tgt,
1101 lsd->lsd_client_start);
1104 last_rcvd_size = lsd->lsd_client_start;
1106 /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */
1107 lsd->lsd_feature_compat |= OBD_COMPAT_20;
1110 spin_lock(&tgt->lut_translock);
1111 tgt->lut_last_transno = lsd->lsd_last_transno;
1112 spin_unlock(&tgt->lut_translock);
1114 lsd->lsd_mount_count++;
1116 CDEBUG(D_INODE, "=======,=BEGIN DUMPING LAST_RCVD========\n");
1117 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
1118 tgt_name(tgt), tgt->lut_last_transno);
1119 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
1120 tgt_name(tgt), lsd->lsd_mount_count);
1121 CDEBUG(D_INODE, "%s: server data size: %u\n",
1122 tgt_name(tgt), lsd->lsd_server_size);
1123 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
1124 tgt_name(tgt), lsd->lsd_client_start);
1125 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
1126 tgt_name(tgt), lsd->lsd_client_size);
1127 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
1128 tgt_name(tgt), last_rcvd_size);
1129 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
1130 tgt_name(tgt), lsd->lsd_subdir_count);
1131 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", tgt_name(tgt),
1132 last_rcvd_size <= lsd->lsd_client_start ? 0 :
1133 (last_rcvd_size - lsd->lsd_client_start) /
1134 lsd->lsd_client_size);
1135 CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n");
1137 if (lsd->lsd_server_size == 0 || lsd->lsd_client_start == 0 ||
1138 lsd->lsd_client_size == 0) {
1139 CERROR("%s: bad last_rcvd contents!\n", tgt_name(tgt));
1143 if (!tgt->lut_obd->obd_replayable)
1144 CWARN("%s: recovery support OFF\n", tgt_name(tgt));
1146 rc = tgt_clients_data_init(env, tgt, last_rcvd_size);
1148 GOTO(err_client, rc);
1150 spin_lock(&tgt->lut_translock);
1151 /* obd_last_committed is used for compatibility
1152 * with other lustre recovery code */
1153 tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
1154 spin_unlock(&tgt->lut_translock);
1156 tgt->lut_obd->u.obt.obt_mount_count = lsd->lsd_mount_count;
1157 tgt->lut_obd->u.obt.obt_instance = (__u32)lsd->lsd_mount_count;
1159 /* save it, so mount count and last_transno is current */
1160 rc = tgt_server_data_update(env, tgt, 0);
1162 GOTO(err_client, rc);
1167 class_disconnect_exports(tgt->lut_obd);
1171 /* add credits for last_rcvd update */
1172 int tgt_txn_start_cb(const struct lu_env *env, struct thandle *th,
1175 struct lu_target *tgt = cookie;
1176 struct tgt_session_info *tsi;
1177 struct tgt_thread_info *tti = tgt_th_info(env);
1180 /* if there is no session, then this transaction is not result of
1181 * request processing but some local operation */
1182 if (env->le_ses == NULL)
1185 LASSERT(tgt->lut_last_rcvd);
1186 tsi = tgt_ses_info(env);
1187 /* OFD may start transaction without export assigned */
1188 if (tsi->tsi_exp == NULL)
1192 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
1194 tsi->tsi_exp->exp_target_data.ted_lr_off,
1200 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
1201 &tti->tti_buf, 0, th);
1205 if (tsi->tsi_vbr_obj != NULL &&
1206 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu))
1207 rc = dt_declare_version_set(env, tsi->tsi_vbr_obj, th);
1212 /* Update last_rcvd records with latests transaction data */
1213 int tgt_txn_stop_cb(const struct lu_env *env, struct thandle *th,
1216 struct lu_target *tgt = cookie;
1217 struct tgt_session_info *tsi;
1218 struct tgt_thread_info *tti = tgt_th_info(env);
1219 struct dt_object *obj = NULL;
1223 if (env->le_ses == NULL)
1226 tsi = tgt_ses_info(env);
1227 /* OFD may start transaction without export assigned */
1228 if (tsi->tsi_exp == NULL)
1231 echo_client = (tgt_ses_req(tsi) == NULL);
1233 if (tti->tti_has_trans && !echo_client) {
1234 if (tti->tti_mult_trans == 0) {
1235 CDEBUG(D_HA, "More than one transaction "LPU64"\n",
1239 /* we need another transno to be assigned */
1240 tti->tti_transno = 0;
1241 } else if (th->th_result == 0) {
1242 tti->tti_has_trans = 1;
1245 if (tsi->tsi_vbr_obj != NULL &&
1246 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
1247 obj = tsi->tsi_vbr_obj;
1250 if (unlikely(echo_client)) /* echo client special case */
1251 rc = tgt_last_rcvd_update_echo(env, tgt, obj, th,
1254 rc = tgt_last_rcvd_update(env, tgt, obj, tsi->tsi_opdata, th,