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);
131 int tgt_client_data_write(const struct lu_env *env, struct lu_target *tgt,
132 struct lsd_client_data *lcd, loff_t *off,
135 struct tgt_thread_info *tti = tgt_th_info(env);
137 lcd->lcd_last_result = ptlrpc_status_hton(lcd->lcd_last_result);
138 lcd->lcd_last_close_result =
139 ptlrpc_status_hton(lcd->lcd_last_close_result);
140 lcd_cpu_to_le(lcd, &tti->tti_lcd);
143 return dt_record_write(env, tgt->lut_last_rcvd, &tti->tti_buf, off, th);
147 * Update client data in last_rcvd
149 static int tgt_client_data_update(const struct lu_env *env,
150 struct obd_export *exp)
152 struct tg_export_data *ted = &exp->exp_target_data;
153 struct lu_target *tgt = class_exp2tgt(exp);
154 struct tgt_thread_info *tti = tgt_th_info(env);
160 th = dt_trans_create(env, tgt->lut_bottom);
165 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
167 ted->ted_lr_off, th);
171 rc = dt_trans_start_local(env, tgt->lut_bottom, th);
175 * Until this operations will be committed the sync is needed
176 * for this export. This should be done _after_ starting the
177 * transaction so that many connecting clients will not bring
178 * server down with lots of sync writes.
180 rc = tgt_new_client_cb_add(th, exp);
182 /* can't add callback, do sync now */
185 spin_lock(&exp->exp_lock);
186 exp->exp_need_sync = 1;
187 spin_unlock(&exp->exp_lock);
190 tti->tti_off = ted->ted_lr_off;
191 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
194 dt_trans_stop(env, tgt->lut_bottom, th);
195 CDEBUG(D_INFO, "%s: update last_rcvd client data for UUID = %s, "
196 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
197 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
202 int tgt_server_data_read(const struct lu_env *env, struct lu_target *tgt)
204 struct tgt_thread_info *tti = tgt_th_info(env);
209 rc = dt_record_read(env, tgt->lut_last_rcvd, &tti->tti_buf,
212 lsd_le_to_cpu(&tti->tti_lsd, &tgt->lut_lsd);
214 CDEBUG(D_INFO, "%s: read last_rcvd server data for UUID = %s, "
215 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
216 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
220 int tgt_server_data_write(const struct lu_env *env, struct lu_target *tgt,
223 struct tgt_thread_info *tti = tgt_th_info(env);
230 lsd_cpu_to_le(&tgt->lut_lsd, &tti->tti_lsd);
232 rc = dt_record_write(env, tgt->lut_last_rcvd, &tti->tti_buf,
235 CDEBUG(D_INFO, "%s: write last_rcvd server data for UUID = %s, "
236 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
237 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
243 * Update server data in last_rcvd
245 int tgt_server_data_update(const struct lu_env *env, struct lu_target *tgt,
248 struct tgt_thread_info *tti = tgt_th_info(env);
255 "%s: mount_count is "LPU64", last_transno is "LPU64"\n",
256 tgt->lut_lsd.lsd_uuid, tgt->lut_obd->u.obt.obt_mount_count,
257 tgt->lut_last_transno);
259 /* Always save latest transno to keep it fresh */
260 spin_lock(&tgt->lut_translock);
261 tgt->lut_lsd.lsd_last_transno = tgt->lut_last_transno;
262 spin_unlock(&tgt->lut_translock);
264 th = dt_trans_create(env, tgt->lut_bottom);
271 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
272 &tti->tti_buf, tti->tti_off, th);
276 rc = dt_trans_start(env, tgt->lut_bottom, th);
280 rc = tgt_server_data_write(env, tgt, th);
282 dt_trans_stop(env, tgt->lut_bottom, th);
284 CDEBUG(D_INFO, "%s: update last_rcvd server data for UUID = %s, "
285 "last_transno = "LPU64": rc = %d\n", tgt->lut_obd->obd_name,
286 tgt->lut_lsd.lsd_uuid, tgt->lut_lsd.lsd_last_transno, rc);
289 EXPORT_SYMBOL(tgt_server_data_update);
291 int tgt_truncate_last_rcvd(const struct lu_env *env, struct lu_target *tgt,
294 struct dt_object *dt = tgt->lut_last_rcvd;
302 attr.la_valid = LA_SIZE;
304 th = dt_trans_create(env, tgt->lut_bottom);
307 rc = dt_declare_punch(env, dt, size, OBD_OBJECT_EOF, th);
310 rc = dt_declare_attr_set(env, dt, &attr, th);
313 rc = dt_trans_start_local(env, tgt->lut_bottom, th);
317 rc = dt_punch(env, dt, size, OBD_OBJECT_EOF, th);
319 rc = dt_attr_set(env, dt, &attr, th);
322 dt_trans_stop(env, tgt->lut_bottom, th);
327 static void tgt_client_epoch_update(const struct lu_env *env,
328 struct obd_export *exp)
330 struct lsd_client_data *lcd = exp->exp_target_data.ted_lcd;
331 struct lu_target *tgt = class_exp2tgt(exp);
333 LASSERT(tgt->lut_bottom);
334 /** VBR: set client last_epoch to current epoch */
335 if (lcd->lcd_last_epoch >= tgt->lut_lsd.lsd_start_epoch)
337 lcd->lcd_last_epoch = tgt->lut_lsd.lsd_start_epoch;
338 tgt_client_data_update(env, exp);
342 * Update boot epoch when recovery ends
344 void tgt_boot_epoch_update(struct lu_target *tgt)
347 struct ptlrpc_request *req;
349 struct list_head client_list;
352 if (tgt->lut_obd->obd_stopping)
355 rc = lu_env_init(&env, LCT_DT_THREAD);
357 CERROR("%s: can't initialize environment: rc = %d\n",
358 tgt->lut_obd->obd_name, rc);
362 spin_lock(&tgt->lut_translock);
363 start_epoch = lr_epoch(tgt->lut_last_transno) + 1;
364 tgt->lut_last_transno = (__u64)start_epoch << LR_EPOCH_BITS;
365 tgt->lut_lsd.lsd_start_epoch = start_epoch;
366 spin_unlock(&tgt->lut_translock);
368 INIT_LIST_HEAD(&client_list);
370 * The recovery is not yet finished and final queue can still be updated
371 * with resend requests. Move final list to separate one for processing
373 spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
374 list_splice_init(&tgt->lut_obd->obd_final_req_queue, &client_list);
375 spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
378 * go through list of exports participated in recovery and
379 * set new epoch for them
381 list_for_each_entry(req, &client_list, rq_list) {
382 LASSERT(!req->rq_export->exp_delayed);
383 if (!req->rq_export->exp_vbr_failed)
384 tgt_client_epoch_update(&env, req->rq_export);
386 /** return list back at once */
387 spin_lock(&tgt->lut_obd->obd_recovery_task_lock);
388 list_splice_init(&client_list, &tgt->lut_obd->obd_final_req_queue);
389 spin_unlock(&tgt->lut_obd->obd_recovery_task_lock);
390 /** update server epoch */
391 tgt_server_data_update(&env, tgt, 1);
396 * commit callback, need to update last_commited value
398 struct tgt_last_committed_callback {
399 struct dt_txn_commit_cb llcc_cb;
400 struct lu_target *llcc_tgt;
401 struct obd_export *llcc_exp;
405 static void tgt_cb_last_committed(struct lu_env *env, struct thandle *th,
406 struct dt_txn_commit_cb *cb, int err)
408 struct tgt_last_committed_callback *ccb;
410 ccb = container_of0(cb, struct tgt_last_committed_callback, llcc_cb);
412 LASSERT(ccb->llcc_tgt != NULL);
413 LASSERT(ccb->llcc_exp->exp_obd == ccb->llcc_tgt->lut_obd);
415 spin_lock(&ccb->llcc_tgt->lut_translock);
416 if (ccb->llcc_transno > ccb->llcc_tgt->lut_obd->obd_last_committed)
417 ccb->llcc_tgt->lut_obd->obd_last_committed = ccb->llcc_transno;
419 LASSERT(ccb->llcc_exp);
420 if (ccb->llcc_transno > ccb->llcc_exp->exp_last_committed) {
421 ccb->llcc_exp->exp_last_committed = ccb->llcc_transno;
422 spin_unlock(&ccb->llcc_tgt->lut_translock);
423 ptlrpc_commit_replies(ccb->llcc_exp);
425 spin_unlock(&ccb->llcc_tgt->lut_translock);
427 class_export_cb_put(ccb->llcc_exp);
428 if (ccb->llcc_transno)
429 CDEBUG(D_HA, "%s: transno "LPD64" is committed\n",
430 ccb->llcc_tgt->lut_obd->obd_name, ccb->llcc_transno);
434 int tgt_last_commit_cb_add(struct thandle *th, struct lu_target *tgt,
435 struct obd_export *exp, __u64 transno)
437 struct tgt_last_committed_callback *ccb;
438 struct dt_txn_commit_cb *dcb;
446 ccb->llcc_exp = class_export_cb_get(exp);
447 ccb->llcc_transno = transno;
450 dcb->dcb_func = tgt_cb_last_committed;
451 INIT_LIST_HEAD(&dcb->dcb_linkage);
452 strlcpy(dcb->dcb_name, "tgt_cb_last_committed", sizeof(dcb->dcb_name));
454 rc = dt_trans_cb_add(th, dcb);
456 class_export_cb_put(exp);
460 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
461 /* report failure to force synchronous operation */
467 struct tgt_new_client_callback {
468 struct dt_txn_commit_cb lncc_cb;
469 struct obd_export *lncc_exp;
472 static void tgt_cb_new_client(struct lu_env *env, struct thandle *th,
473 struct dt_txn_commit_cb *cb, int err)
475 struct tgt_new_client_callback *ccb;
477 ccb = container_of0(cb, struct tgt_new_client_callback, lncc_cb);
479 LASSERT(ccb->lncc_exp->exp_obd);
481 CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n",
482 ccb->lncc_exp->exp_obd->obd_name,
483 ccb->lncc_exp->exp_client_uuid.uuid);
485 spin_lock(&ccb->lncc_exp->exp_lock);
486 /* XXX: Currently, we use per-export based sync/async policy for
487 * the update via OUT RPC, it is coarse-grained policy, and
488 * will be changed as per-request based by DNE II patches. */
489 if (!ccb->lncc_exp->exp_keep_sync)
490 ccb->lncc_exp->exp_need_sync = 0;
492 spin_unlock(&ccb->lncc_exp->exp_lock);
493 class_export_cb_put(ccb->lncc_exp);
498 int tgt_new_client_cb_add(struct thandle *th, struct obd_export *exp)
500 struct tgt_new_client_callback *ccb;
501 struct dt_txn_commit_cb *dcb;
508 ccb->lncc_exp = class_export_cb_get(exp);
511 dcb->dcb_func = tgt_cb_new_client;
512 INIT_LIST_HEAD(&dcb->dcb_linkage);
513 strlcpy(dcb->dcb_name, "tgt_cb_new_client", sizeof(dcb->dcb_name));
515 rc = dt_trans_cb_add(th, dcb);
517 class_export_cb_put(exp);
524 * Add new client to the last_rcvd upon new connection.
526 * We use a bitmap to locate a free space in the last_rcvd file and initialize
529 int tgt_client_new(const struct lu_env *env, struct obd_export *exp)
531 struct tg_export_data *ted = &exp->exp_target_data;
532 struct lu_target *tgt = class_exp2tgt(exp);
537 LASSERT(tgt->lut_client_bitmap != NULL);
538 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid))
541 mutex_init(&ted->ted_lcd_lock);
543 if (exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
546 /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
547 * there's no need for extra complication here
549 idx = find_first_zero_bit(tgt->lut_client_bitmap, LR_MAX_CLIENTS);
551 if (idx >= LR_MAX_CLIENTS ||
552 OBD_FAIL_CHECK(OBD_FAIL_MDS_CLIENT_ADD)) {
553 CERROR("%s: no room for %u clients - fix LR_MAX_CLIENTS\n",
554 tgt->lut_obd->obd_name, idx);
557 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
558 idx = find_next_zero_bit(tgt->lut_client_bitmap,
559 LR_MAX_CLIENTS, idx);
563 CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
564 tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
566 ted->ted_lr_idx = idx;
567 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
568 idx * tgt->lut_lsd.lsd_client_size;
570 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
572 CDEBUG(D_INFO, "%s: new client at index %d (%llu) with UUID '%s'\n",
573 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
574 ted->ted_lcd->lcd_uuid);
576 if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
579 rc = tgt_client_data_update(env, exp);
581 CERROR("%s: Failed to write client lcd at idx %d, rc %d\n",
582 tgt->lut_obd->obd_name, idx, rc);
586 EXPORT_SYMBOL(tgt_client_new);
588 /* Add client data to the MDS. We use a bitmap to locate a free space
589 * in the last_rcvd file if cl_off is -1 (i.e. a new client).
590 * Otherwise, we just have to read the data from the last_rcvd file and
591 * we know its offset.
593 * It should not be possible to fail adding an existing client - otherwise
594 * mdt_init_server_data() callsite needs to be fixed.
596 int tgt_client_add(const struct lu_env *env, struct obd_export *exp, int idx)
598 struct tg_export_data *ted = &exp->exp_target_data;
599 struct lu_target *tgt = class_exp2tgt(exp);
603 LASSERT(tgt->lut_client_bitmap != NULL);
604 LASSERTF(idx >= 0, "%d\n", idx);
606 if (!strcmp(ted->ted_lcd->lcd_uuid, tgt->lut_obd->obd_uuid.uuid) ||
607 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
610 if (test_and_set_bit(idx, tgt->lut_client_bitmap)) {
611 CERROR("%s: client %d: bit already set in bitmap!!\n",
612 tgt->lut_obd->obd_name, idx);
616 CDEBUG(D_INFO, "%s: client at idx %d with UUID '%s' added\n",
617 tgt->lut_obd->obd_name, idx, ted->ted_lcd->lcd_uuid);
619 ted->ted_lr_idx = idx;
620 ted->ted_lr_off = tgt->lut_lsd.lsd_client_start +
621 idx * tgt->lut_lsd.lsd_client_size;
623 mutex_init(&ted->ted_lcd_lock);
625 LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
630 int tgt_client_del(const struct lu_env *env, struct obd_export *exp)
632 struct tg_export_data *ted = &exp->exp_target_data;
633 struct lu_target *tgt = class_exp2tgt(exp);
638 LASSERT(ted->ted_lcd);
640 /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
641 if (!strcmp((char *)ted->ted_lcd->lcd_uuid,
642 (char *)tgt->lut_obd->obd_uuid.uuid) ||
643 exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT)
646 CDEBUG(D_INFO, "%s: del client at idx %u, off %lld, UUID '%s'\n",
647 tgt->lut_obd->obd_name, ted->ted_lr_idx, ted->ted_lr_off,
648 ted->ted_lcd->lcd_uuid);
650 /* Clear the bit _after_ zeroing out the client so we don't
651 race with filter_client_add and zero out new clients.*/
652 if (!test_bit(ted->ted_lr_idx, tgt->lut_client_bitmap)) {
653 CERROR("%s: client %u: bit already clear in bitmap!!\n",
654 tgt->lut_obd->obd_name, ted->ted_lr_idx);
658 /* Do not erase record for recoverable client. */
659 if (exp->exp_flags & OBD_OPT_FAILOVER)
662 /* Make sure the server's last_transno is up to date.
663 * This should be done before zeroing client slot so last_transno will
664 * be in server data or in client data in case of failure */
665 rc = tgt_server_data_update(env, tgt, 0);
667 CERROR("%s: failed to update server data, skip client %s "
668 "zeroing, rc %d\n", tgt->lut_obd->obd_name,
669 ted->ted_lcd->lcd_uuid, rc);
673 mutex_lock(&ted->ted_lcd_lock);
674 memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
675 rc = tgt_client_data_update(env, exp);
676 mutex_unlock(&ted->ted_lcd_lock);
678 CDEBUG(rc == 0 ? D_INFO : D_ERROR,
679 "%s: zeroing out client %s at idx %u (%llu), rc %d\n",
680 tgt->lut_obd->obd_name, ted->ted_lcd->lcd_uuid,
681 ted->ted_lr_idx, ted->ted_lr_off, rc);
684 EXPORT_SYMBOL(tgt_client_del);
687 * last_rcvd & last_committed update callbacks
689 static int tgt_last_rcvd_update(const struct lu_env *env, struct lu_target *tgt,
690 struct dt_object *obj, __u64 opdata,
691 struct thandle *th, struct ptlrpc_request *req)
693 struct tgt_thread_info *tti = tgt_th_info(env);
694 struct tg_export_data *ted;
697 bool lw_client, update = false;
701 ted = &req->rq_export->exp_target_data;
703 lw_client = exp_connect_flags(req->rq_export) & OBD_CONNECT_LIGHTWEIGHT;
704 if (ted->ted_lr_idx < 0 && !lw_client)
705 /* ofd connect may cause transaction before export has
709 tti->tti_transno = lustre_msg_get_transno(req->rq_reqmsg);
711 spin_lock(&tgt->lut_translock);
712 if (th->th_result != 0) {
713 if (tti->tti_transno != 0) {
714 CERROR("%s: replay transno "LPU64" failed: rc = %d\n",
715 tgt_name(tgt), tti->tti_transno, th->th_result);
717 } else if (tti->tti_transno == 0) {
718 tti->tti_transno = ++tgt->lut_last_transno;
720 /* should be replay */
721 if (tti->tti_transno > tgt->lut_last_transno)
722 tgt->lut_last_transno = tti->tti_transno;
724 spin_unlock(&tgt->lut_translock);
726 /** VBR: set new versions */
727 if (th->th_result == 0 && obj != NULL)
728 dt_version_set(env, obj, tti->tti_transno, th);
730 /* filling reply data */
731 CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n",
732 tti->tti_transno, tgt->lut_obd->obd_last_committed);
734 req->rq_transno = tti->tti_transno;
735 lustre_msg_set_transno(req->rq_repmsg, tti->tti_transno);
737 /* if can't add callback, do sync write */
738 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, req->rq_export,
742 /* All operations performed by LW clients are synchronous and
743 * we store the committed transno in the last_rcvd header */
744 spin_lock(&tgt->lut_translock);
745 if (tti->tti_transno > tgt->lut_lsd.lsd_last_transno) {
746 tgt->lut_lsd.lsd_last_transno = tti->tti_transno;
749 spin_unlock(&tgt->lut_translock);
750 /* Although lightweight (LW) connections have no slot in
751 * last_rcvd, we still want to maintain the in-memory
752 * lsd_client_data structure in order to properly handle reply
754 } else if (ted->ted_lr_off == 0) {
755 CERROR("%s: client idx %d has offset %lld\n",
756 tgt_name(tgt), ted->ted_lr_idx, ted->ted_lr_off);
760 /* if the export has already been disconnected, we have no last_rcvd
761 * slot, update server data with latest transno then */
762 if (ted->ted_lcd == NULL) {
763 CWARN("commit transaction for disconnected client %s: rc %d\n",
764 req->rq_export->exp_client_uuid.uuid, rc);
765 GOTO(srv_update, rc = 0);
768 mutex_lock(&ted->ted_lcd_lock);
769 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
770 if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
771 transno_p = &ted->ted_lcd->lcd_last_close_transno;
772 ted->ted_lcd->lcd_last_close_xid = req->rq_xid;
773 ted->ted_lcd->lcd_last_close_result = th->th_result;
775 /* VBR: save versions in last_rcvd for reconstruct. */
776 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
779 ted->ted_lcd->lcd_pre_versions[0] = pre_versions[0];
780 ted->ted_lcd->lcd_pre_versions[1] = pre_versions[1];
781 ted->ted_lcd->lcd_pre_versions[2] = pre_versions[2];
782 ted->ted_lcd->lcd_pre_versions[3] = pre_versions[3];
784 transno_p = &ted->ted_lcd->lcd_last_transno;
785 ted->ted_lcd->lcd_last_xid = req->rq_xid;
786 ted->ted_lcd->lcd_last_result = th->th_result;
787 /* XXX: lcd_last_data is __u32 but intent_dispostion is __u64,
788 * see struct ldlm_reply->lock_policy_res1; */
789 ted->ted_lcd->lcd_last_data = opdata;
792 /* Update transno in slot only if non-zero number, i.e. no errors */
793 if (likely(tti->tti_transno != 0)) {
794 if (*transno_p > tti->tti_transno &&
795 !tgt->lut_no_reconstruct) {
796 CERROR("%s: trying to overwrite bigger transno:"
797 "on-disk: "LPU64", new: "LPU64" replay: %d. "
798 "see LU-617.\n", tgt_name(tgt), *transno_p,
799 tti->tti_transno, req_is_replay(req));
800 if (req_is_replay(req)) {
801 spin_lock(&req->rq_export->exp_lock);
802 req->rq_export->exp_vbr_failed = 1;
803 spin_unlock(&req->rq_export->exp_lock);
805 mutex_unlock(&ted->ted_lcd_lock);
806 RETURN(req_is_replay(req) ? -EOVERFLOW : 0);
808 *transno_p = tti->tti_transno;
812 tti->tti_off = ted->ted_lr_off;
813 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
815 mutex_unlock(&ted->ted_lcd_lock);
819 mutex_unlock(&ted->ted_lcd_lock);
823 rc = tgt_server_data_write(env, tgt, th);
828 * last_rcvd update for echo client simulation.
829 * It updates last_rcvd client slot and version of object in
830 * simple way but with all locks to simulate all drawbacks
832 static int tgt_last_rcvd_update_echo(const struct lu_env *env,
833 struct lu_target *tgt,
834 struct dt_object *obj,
836 struct obd_export *exp)
838 struct tgt_thread_info *tti = tgt_th_info(env);
839 struct tg_export_data *ted = &exp->exp_target_data;
844 tti->tti_transno = 0;
846 spin_lock(&tgt->lut_translock);
847 if (th->th_result == 0)
848 tti->tti_transno = ++tgt->lut_last_transno;
849 spin_unlock(&tgt->lut_translock);
851 /** VBR: set new versions */
852 if (th->th_result == 0 && obj != NULL)
853 dt_version_set(env, obj, tti->tti_transno, th);
855 /* if can't add callback, do sync write */
856 th->th_sync |= !!tgt_last_commit_cb_add(th, tgt, exp,
859 LASSERT(ted->ted_lr_off > 0);
861 mutex_lock(&ted->ted_lcd_lock);
862 LASSERT(ergo(tti->tti_transno == 0, th->th_result != 0));
863 ted->ted_lcd->lcd_last_transno = tti->tti_transno;
864 ted->ted_lcd->lcd_last_result = th->th_result;
866 tti->tti_off = ted->ted_lr_off;
867 rc = tgt_client_data_write(env, tgt, ted->ted_lcd, &tti->tti_off, th);
868 mutex_unlock(&ted->ted_lcd_lock);
872 static int tgt_clients_data_init(const struct lu_env *env,
873 struct lu_target *tgt,
874 unsigned long last_size)
876 struct obd_device *obd = tgt->lut_obd;
877 struct lr_server_data *lsd = &tgt->lut_lsd;
878 struct lsd_client_data *lcd = NULL;
879 struct tg_export_data *ted;
882 loff_t off = lsd->lsd_client_start;
886 CLASSERT(offsetof(struct lsd_client_data, lcd_padding) +
887 sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
893 for (cl_idx = 0; off < last_size; cl_idx++) {
894 struct obd_export *exp;
897 /* Don't assume off is incremented properly by
898 * read_record(), in case sizeof(*lcd)
899 * isn't the same as fsd->lsd_client_size. */
900 off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
901 rc = tgt_client_data_read(env, tgt, lcd, &off, cl_idx);
903 CERROR("%s: error reading last_rcvd %s idx %d off "
904 "%llu: rc = %d\n", tgt_name(tgt), LAST_RCVD,
907 break; /* read error shouldn't cause startup to fail */
910 if (lcd->lcd_uuid[0] == '\0') {
911 CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
916 last_transno = lcd_last_transno(lcd);
918 /* These exports are cleaned up by disconnect, so they
919 * need to be set up like real exports as connect does.
921 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
922 " srv lr: "LPU64" lx: "LPU64"\n", lcd->lcd_uuid, cl_idx,
923 last_transno, lsd->lsd_last_transno, lcd_last_xid(lcd));
925 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
927 if (PTR_ERR(exp) == -EALREADY) {
928 /* export already exists, zero out this one */
929 CERROR("%s: Duplicate export %s!\n",
930 tgt_name(tgt), lcd->lcd_uuid);
933 GOTO(err_out, rc = PTR_ERR(exp));
936 ted = &exp->exp_target_data;
937 *ted->ted_lcd = *lcd;
939 rc = tgt_client_add(env, exp, cl_idx);
940 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
941 /* VBR: set export last committed version */
942 exp->exp_last_committed = last_transno;
943 spin_lock(&exp->exp_lock);
944 exp->exp_connecting = 0;
945 exp->exp_in_recovery = 0;
946 spin_unlock(&exp->exp_lock);
947 obd->obd_max_recoverable_clients++;
948 class_export_put(exp);
950 /* Need to check last_rcvd even for duplicated exports. */
951 CDEBUG(D_OTHER, "client at idx %d has last_transno = "LPU64"\n",
952 cl_idx, last_transno);
954 spin_lock(&tgt->lut_translock);
955 tgt->lut_last_transno = max(last_transno,
956 tgt->lut_last_transno);
957 spin_unlock(&tgt->lut_translock);
965 struct server_compat_data {
972 static struct server_compat_data tgt_scd[] = {
973 [LDD_F_SV_TYPE_MDT] = {
974 .rocompat = OBD_ROCOMPAT_LOVOBJID,
975 .incompat = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
976 OBD_INCOMPAT_FID | OBD_INCOMPAT_IAM_DIR |
977 OBD_INCOMPAT_LMM_VER | OBD_INCOMPAT_MULTI_OI,
978 .rocinit = OBD_ROCOMPAT_LOVOBJID,
979 .incinit = OBD_INCOMPAT_MDT | OBD_INCOMPAT_COMMON_LR |
980 OBD_INCOMPAT_MULTI_OI,
982 [LDD_F_SV_TYPE_OST] = {
983 .rocompat = OBD_ROCOMPAT_IDX_IN_IDIF,
984 .incompat = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR |
986 .rocinit = OBD_ROCOMPAT_IDX_IN_IDIF,
987 .incinit = OBD_INCOMPAT_OST | OBD_INCOMPAT_COMMON_LR,
991 int tgt_server_data_init(const struct lu_env *env, struct lu_target *tgt)
993 struct tgt_thread_info *tti = tgt_th_info(env);
994 struct lr_server_data *lsd = &tgt->lut_lsd;
995 unsigned long last_rcvd_size;
999 rc = dt_attr_get(env, tgt->lut_last_rcvd, &tti->tti_attr);
1003 last_rcvd_size = (unsigned long)tti->tti_attr.la_size;
1005 /* ensure padding in the struct is the correct size */
1006 CLASSERT(offsetof(struct lr_server_data, lsd_padding) +
1007 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
1009 rc = server_name2index(tgt_name(tgt), &index, NULL);
1011 CERROR("%s: Can not get index from name: rc = %d\n",
1015 /* server_name2index() returns type */
1017 if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST) {
1018 CERROR("%s: unknown target type %x\n", tgt_name(tgt), type);
1022 /* last_rcvd on OST doesn't provide reconstruct support because there
1023 * may be up to 8 in-flight write requests per single slot in
1024 * last_rcvd client data
1026 tgt->lut_no_reconstruct = (type == LDD_F_SV_TYPE_OST);
1028 if (last_rcvd_size == 0) {
1029 LCONSOLE_WARN("%s: new disk, initializing\n", tgt_name(tgt));
1031 memcpy(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid,
1032 sizeof(lsd->lsd_uuid));
1033 lsd->lsd_last_transno = 0;
1034 lsd->lsd_mount_count = 0;
1035 lsd->lsd_server_size = LR_SERVER_SIZE;
1036 lsd->lsd_client_start = LR_CLIENT_START;
1037 lsd->lsd_client_size = LR_CLIENT_SIZE;
1038 lsd->lsd_subdir_count = OBJ_SUBDIR_COUNT;
1039 lsd->lsd_osd_index = index;
1040 lsd->lsd_feature_rocompat = tgt_scd[type].rocinit;
1041 lsd->lsd_feature_incompat = tgt_scd[type].incinit;
1043 rc = tgt_server_data_read(env, tgt);
1045 CERROR("%s: error reading LAST_RCVD: rc= %d\n",
1049 if (strcmp(lsd->lsd_uuid, tgt->lut_obd->obd_uuid.uuid)) {
1050 LCONSOLE_ERROR_MSG(0x157, "Trying to start OBD %s "
1051 "using the wrong disk %s. Were the"
1052 " /dev/ assignments rearranged?\n",
1053 tgt->lut_obd->obd_uuid.uuid,
1058 if (lsd->lsd_osd_index != index) {
1059 LCONSOLE_ERROR_MSG(0x157, "%s: index %d in last rcvd "
1060 "is different with the index %d in"
1061 "config log, It might be disk"
1062 "corruption!\n", tgt_name(tgt),
1063 lsd->lsd_osd_index, index);
1068 if (lsd->lsd_feature_incompat & ~tgt_scd[type].incompat) {
1069 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
1071 lsd->lsd_feature_incompat & ~tgt_scd[type].incompat);
1075 if (type == LDD_F_SV_TYPE_MDT)
1076 lsd->lsd_feature_incompat |= OBD_INCOMPAT_FID;
1078 if (lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat) {
1079 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
1081 lsd->lsd_feature_rocompat & ~tgt_scd[type].rocompat);
1084 /** Interop: evict all clients at first boot with 1.8 last_rcvd */
1085 if (type == LDD_F_SV_TYPE_MDT &&
1086 !(lsd->lsd_feature_compat & OBD_COMPAT_20)) {
1087 if (last_rcvd_size > lsd->lsd_client_start) {
1088 LCONSOLE_WARN("%s: mounting at first time on 1.8 FS, "
1089 "remove all clients for interop needs\n",
1091 rc = tgt_truncate_last_rcvd(env, tgt,
1092 lsd->lsd_client_start);
1095 last_rcvd_size = lsd->lsd_client_start;
1097 /** set 2.0 flag to upgrade/downgrade between 1.8 and 2.0 */
1098 lsd->lsd_feature_compat |= OBD_COMPAT_20;
1101 spin_lock(&tgt->lut_translock);
1102 tgt->lut_last_transno = lsd->lsd_last_transno;
1103 spin_unlock(&tgt->lut_translock);
1105 lsd->lsd_mount_count++;
1107 CDEBUG(D_INODE, "=======,=BEGIN DUMPING LAST_RCVD========\n");
1108 CDEBUG(D_INODE, "%s: server last_transno: "LPU64"\n",
1109 tgt_name(tgt), tgt->lut_last_transno);
1110 CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
1111 tgt_name(tgt), lsd->lsd_mount_count);
1112 CDEBUG(D_INODE, "%s: server data size: %u\n",
1113 tgt_name(tgt), lsd->lsd_server_size);
1114 CDEBUG(D_INODE, "%s: per-client data start: %u\n",
1115 tgt_name(tgt), lsd->lsd_client_start);
1116 CDEBUG(D_INODE, "%s: per-client data size: %u\n",
1117 tgt_name(tgt), lsd->lsd_client_size);
1118 CDEBUG(D_INODE, "%s: last_rcvd size: %lu\n",
1119 tgt_name(tgt), last_rcvd_size);
1120 CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
1121 tgt_name(tgt), lsd->lsd_subdir_count);
1122 CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", tgt_name(tgt),
1123 last_rcvd_size <= lsd->lsd_client_start ? 0 :
1124 (last_rcvd_size - lsd->lsd_client_start) /
1125 lsd->lsd_client_size);
1126 CDEBUG(D_INODE, "========END DUMPING LAST_RCVD========\n");
1128 if (lsd->lsd_server_size == 0 || lsd->lsd_client_start == 0 ||
1129 lsd->lsd_client_size == 0) {
1130 CERROR("%s: bad last_rcvd contents!\n", tgt_name(tgt));
1134 if (!tgt->lut_obd->obd_replayable)
1135 CWARN("%s: recovery support OFF\n", tgt_name(tgt));
1137 rc = tgt_clients_data_init(env, tgt, last_rcvd_size);
1139 GOTO(err_client, rc);
1141 spin_lock(&tgt->lut_translock);
1142 /* obd_last_committed is used for compatibility
1143 * with other lustre recovery code */
1144 tgt->lut_obd->obd_last_committed = tgt->lut_last_transno;
1145 spin_unlock(&tgt->lut_translock);
1147 tgt->lut_obd->u.obt.obt_mount_count = lsd->lsd_mount_count;
1148 tgt->lut_obd->u.obt.obt_instance = (__u32)lsd->lsd_mount_count;
1150 /* save it, so mount count and last_transno is current */
1151 rc = tgt_server_data_update(env, tgt, 0);
1153 GOTO(err_client, rc);
1158 class_disconnect_exports(tgt->lut_obd);
1162 /* add credits for last_rcvd update */
1163 int tgt_txn_start_cb(const struct lu_env *env, struct thandle *th,
1166 struct lu_target *tgt = cookie;
1167 struct tgt_session_info *tsi;
1168 struct tgt_thread_info *tti = tgt_th_info(env);
1171 /* if there is no session, then this transaction is not result of
1172 * request processing but some local operation */
1173 if (env->le_ses == NULL)
1176 LASSERT(tgt->lut_last_rcvd);
1177 tsi = tgt_ses_info(env);
1178 /* OFD may start transaction without export assigned */
1179 if (tsi->tsi_exp == NULL)
1183 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
1185 tsi->tsi_exp->exp_target_data.ted_lr_off,
1191 rc = dt_declare_record_write(env, tgt->lut_last_rcvd,
1192 &tti->tti_buf, 0, th);
1196 if (tsi->tsi_vbr_obj != NULL &&
1197 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu))
1198 rc = dt_declare_version_set(env, tsi->tsi_vbr_obj, th);
1203 /* Update last_rcvd records with latests transaction data */
1204 int tgt_txn_stop_cb(const struct lu_env *env, struct thandle *th,
1207 struct lu_target *tgt = cookie;
1208 struct tgt_session_info *tsi;
1209 struct tgt_thread_info *tti = tgt_th_info(env);
1210 struct dt_object *obj = NULL;
1214 if (env->le_ses == NULL)
1217 tsi = tgt_ses_info(env);
1218 /* OFD may start transaction without export assigned */
1219 if (tsi->tsi_exp == NULL)
1222 echo_client = (tgt_ses_req(tsi) == NULL);
1224 if (tti->tti_has_trans && !echo_client) {
1225 if (tti->tti_mult_trans == 0) {
1226 CDEBUG(D_HA, "More than one transaction "LPU64"\n",
1230 /* we need another transno to be assigned */
1231 tti->tti_transno = 0;
1232 } else if (th->th_result == 0) {
1233 tti->tti_has_trans = 1;
1236 if (tsi->tsi_vbr_obj != NULL &&
1237 !lu_object_remote(&tsi->tsi_vbr_obj->do_lu)) {
1238 obj = tsi->tsi_vbr_obj;
1241 if (unlikely(echo_client)) /* echo client special case */
1242 rc = tgt_last_rcvd_update_echo(env, tgt, obj, th,
1245 rc = tgt_last_rcvd_update(env, tgt, obj, tsi->tsi_opdata, th,