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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2014, 2015, Intel Corporation.
26 * lustre/target/update_trans.c
28 * This file implements the update distribute transaction API.
30 * To manage the cross-MDT operation (distribute operation) transaction,
31 * the transaction will also be separated two layers on MD stack, top
32 * transaction and sub transaction.
34 * During the distribute operation, top transaction is created in the LOD
35 * layer, and represent the operation. Sub transaction is created by
36 * each OSD or OSP. Top transaction start/stop will trigger all of its sub
37 * transaction start/stop. Top transaction (the whole operation) is committed
38 * only all of its sub transaction are committed.
40 * there are three kinds of transactions
41 * 1. local transaction: All updates are in a single local OSD.
42 * 2. Remote transaction: All Updates are only in the remote OSD,
43 * i.e. locally all updates are in OSP.
44 * 3. Mixed transaction: Updates are both in local OSD and remote
47 * Author: Di Wang <di.wang@intel.com>
50 #define DEBUG_SUBSYSTEM S_CLASS
52 #include <linux/kthread.h>
53 #include <lu_target.h>
54 #include <lustre_log.h>
55 #include <lustre_update.h>
57 #include <obd_class.h>
58 #include <tgt_internal.h>
60 #include <tgt_internal.h>
62 * Dump top mulitple thandle
64 * Dump top multiple thandle and all of its sub thandle to the debug log.
66 * \param[in]mask debug mask
67 * \param[in]top_th top_thandle to be dumped
69 static void top_multiple_thandle_dump(struct top_multiple_thandle *tmt,
72 struct sub_thandle *st;
74 LASSERT(tmt->tmt_magic == TOP_THANDLE_MAGIC);
75 CDEBUG(mask, "%s tmt %p refcount %d committed %d result %d"
77 tmt->tmt_master_sub_dt ?
78 tmt->tmt_master_sub_dt->dd_lu_dev.ld_obd->obd_name :
80 tmt, atomic_read(&tmt->tmt_refcount), tmt->tmt_committed,
81 tmt->tmt_result, tmt->tmt_batchid);
83 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
84 struct sub_thandle_cookie *stc;
86 CDEBUG(mask, "st %p obd %s committed %d sub_th %p\n",
87 st, st->st_dt->dd_lu_dev.ld_obd->obd_name,
88 st->st_committed, st->st_sub_th);
90 list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
91 CDEBUG(mask, " cookie "DOSTID": %u\n",
92 POSTID(&stc->stc_cookie.lgc_lgl.lgl_oi),
93 stc->stc_cookie.lgc_index);
99 * Declare write update to sub device
101 * Declare Write updates llog records to the sub device during distribute
104 * \param[in] env execution environment
105 * \param[in] record update records being written
106 * \param[in] sub_th sub transaction handle
107 * \param[in] record_size total update record size
109 * \retval 0 if writing succeeds
110 * \retval negative errno if writing fails
112 static int sub_declare_updates_write(const struct lu_env *env,
113 struct llog_update_record *record,
114 struct thandle *sub_th, size_t record_size)
116 struct llog_ctxt *ctxt;
117 struct dt_device *dt = sub_th->th_dev;
118 int left = record_size;
121 /* If ctxt is NULL, it means not need to write update,
122 * for example if the the OSP is used to connect to OST */
123 ctxt = llog_get_context(dt->dd_lu_dev.ld_obd,
124 LLOG_UPDATELOG_ORIG_CTXT);
126 /* Not ready to record updates yet. */
127 if (ctxt == NULL || ctxt->loc_handle == NULL) {
132 rc = llog_declare_add(env, ctxt->loc_handle,
133 &record->lur_hdr, sub_th);
137 while (left > ctxt->loc_chunk_size) {
138 rc = llog_declare_add(env, ctxt->loc_handle,
139 &record->lur_hdr, sub_th);
143 left -= ctxt->loc_chunk_size;
153 * write update to sub device
155 * Write llog update record to the sub device during distribute
156 * transaction. If it succeeds, llog cookie of the record will be
157 * returned by @cookie.
159 * \param[in] env execution environment
160 * \param[in] record update records being written
161 * \param[in] sub_th sub transaction handle
162 * \param[out] cookie llog cookie of the update record.
164 * \retval 1 if writing succeeds
165 * \retval negative errno if writing fails
167 static int sub_updates_write(const struct lu_env *env,
168 struct llog_update_record *record,
169 struct sub_thandle *sub_th)
171 struct dt_device *dt = sub_th->st_dt;
172 struct llog_ctxt *ctxt;
174 struct llog_update_record *lur = NULL;
175 struct update_params *params = NULL;
176 __u32 update_count = 0;
177 __u32 param_count = 0;
178 __u32 last_update_count = 0;
179 __u32 last_param_count = 0;
183 struct sub_thandle_cookie *stc;
186 ctxt = llog_get_context(dt->dd_lu_dev.ld_obd,
187 LLOG_UPDATELOG_ORIG_CTXT);
188 /* If ctxt == NULL, then it means updates on OST (only happens
189 * during migration), and we do not track those updates for now */
190 /* If ctxt->loc_handle == NULL, then it does not need to record
191 * update, usually happens in error handler path */
192 if (ctxt == NULL || ctxt->loc_handle == NULL) {
197 /* Since the cross-MDT updates will includes both local
198 * and remote updates, the update ops count must > 1 */
199 LASSERT(record->lur_update_rec.ur_update_count > 1);
200 LASSERTF(record->lur_hdr.lrh_len == llog_update_record_size(record),
201 "lrh_len %u record_size %zu\n", record->lur_hdr.lrh_len,
202 llog_update_record_size(record));
204 if (likely(record->lur_hdr.lrh_len <= ctxt->loc_chunk_size)) {
207 GOTO(llog_put, rc = -ENOMEM);
208 INIT_LIST_HEAD(&stc->stc_list);
210 rc = llog_add(env, ctxt->loc_handle, &record->lur_hdr,
211 &stc->stc_cookie, sub_th->st_sub_th);
213 CDEBUG(D_INFO, "%s: Add update log "DOSTID":%u: rc = %d\n",
214 dt->dd_lu_dev.ld_obd->obd_name,
215 POSTID(&stc->stc_cookie.lgc_lgl.lgl_oi),
216 stc->stc_cookie.lgc_index, rc);
219 list_add(&stc->stc_list, &sub_th->st_cookie_list);
228 /* Split the records into chunk_size update record */
229 OBD_ALLOC_LARGE(lur, ctxt->loc_chunk_size);
231 GOTO(llog_put, rc = -ENOMEM);
233 memcpy(lur, &record->lur_hdr, sizeof(record->lur_hdr));
234 lur->lur_update_rec.ur_update_count = 0;
235 lur->lur_update_rec.ur_param_count = 0;
236 src = &record->lur_update_rec.ur_ops;
238 lur->lur_hdr.lrh_len = llog_update_record_size(lur);
239 params = update_records_get_params(&record->lur_update_rec);
243 if (update_count < record->lur_update_rec.ur_update_count) {
244 next = update_op_next_op((struct update_op *)src);
246 if (param_count == 0)
247 next = update_records_get_params(
248 &record->lur_update_rec);
251 object_update_param_size(
252 (struct object_update_param *)src);
255 rec_len = cfs_size_round((unsigned long)(next - src));
256 /* If its size > llog chunk_size, then write current chunk to
257 * the update llog. */
258 if (lur->lur_hdr.lrh_len + rec_len + LLOG_MIN_REC_SIZE >
259 ctxt->loc_chunk_size ||
260 param_count == record->lur_update_rec.ur_param_count) {
261 lur->lur_update_rec.ur_update_count =
262 update_count > last_update_count ?
263 update_count - last_update_count : 0;
264 lur->lur_update_rec.ur_param_count = param_count -
267 memcpy(&lur->lur_update_rec.ur_ops, start,
268 (unsigned long)(src - start));
269 if (last_update_count != 0)
270 lur->lur_update_rec.ur_flags |=
271 UPDATE_RECORD_CONTINUE;
273 update_records_dump(&lur->lur_update_rec, D_INFO, true);
274 lur->lur_hdr.lrh_len = llog_update_record_size(lur);
275 LASSERT(lur->lur_hdr.lrh_len <= ctxt->loc_chunk_size);
279 GOTO(llog_put, rc = -ENOMEM);
280 INIT_LIST_HEAD(&stc->stc_list);
282 rc = llog_add(env, ctxt->loc_handle,
284 &stc->stc_cookie, sub_th->st_sub_th);
286 CDEBUG(D_INFO, "%s: Add update log "DOSTID":%u"
287 " rc = %d\n", dt->dd_lu_dev.ld_obd->obd_name,
288 POSTID(&stc->stc_cookie.lgc_lgl.lgl_oi),
289 stc->stc_cookie.lgc_index, rc);
292 list_add(&stc->stc_list,
293 &sub_th->st_cookie_list);
300 last_update_count = update_count;
301 last_param_count = param_count;
303 lur->lur_update_rec.ur_update_count = 0;
304 lur->lur_update_rec.ur_param_count = 0;
305 lur->lur_hdr.lrh_len = llog_update_record_size(lur);
309 lur->lur_hdr.lrh_len += cfs_size_round(rec_len);
310 if (update_count < record->lur_update_rec.ur_update_count)
312 else if (param_count < record->lur_update_rec.ur_param_count)
320 OBD_FREE_LARGE(lur, ctxt->loc_chunk_size);
327 * Prepare the update records.
329 * Merge params and ops into the update records, then initializing
332 * During transaction execution phase, parameters and update ops
333 * are collected in two different buffers (see lod_updates_pack()),
334 * during transaction stop, it needs to be merged in one buffer,
335 * so it will be written in the update log.
337 * \param[in] env execution environment
338 * \param[in] tmt top_multiple_thandle for distribute txn
340 * \retval 0 if merging succeeds.
341 * \retval negaitive errno if merging fails.
343 static int prepare_writing_updates(const struct lu_env *env,
344 struct top_multiple_thandle *tmt)
346 struct thandle_update_records *tur = tmt->tmt_update_records;
347 struct llog_update_record *lur;
348 struct update_params *params;
352 if (tur == NULL || tur->tur_update_records == NULL ||
353 tur->tur_update_params == NULL)
356 lur = tur->tur_update_records;
357 /* Extends the update records buffer if needed */
358 params_size = update_params_size(tur->tur_update_params,
359 tur->tur_update_param_count);
360 LASSERT(lur->lur_update_rec.ur_param_count == 0);
361 update_size = llog_update_record_size(lur);
362 if (cfs_size_round(update_size + params_size) >
363 tur->tur_update_records_buf_size) {
366 rc = tur_update_records_extend(tur,
367 cfs_size_round(update_size + params_size));
371 lur = tur->tur_update_records;
374 params = update_records_get_params(&lur->lur_update_rec);
375 memcpy(params, tur->tur_update_params, params_size);
377 lur->lur_update_rec.ur_param_count = tur->tur_update_param_count;
378 lur->lur_update_rec.ur_batchid = tmt->tmt_batchid;
379 /* Init update record header */
380 lur->lur_hdr.lrh_len = llog_update_record_size(lur);
381 lur->lur_hdr.lrh_type = UPDATE_REC;
383 /* Dump updates for debugging purpose */
384 update_records_dump(&lur->lur_update_rec, D_INFO, true);
390 distribute_txn_commit_thread_running(struct lu_target *lut)
392 return lut->lut_tdtd_commit_thread.t_flags & SVC_RUNNING;
396 distribute_txn_commit_thread_stopped(struct lu_target *lut)
398 return lut->lut_tdtd_commit_thread.t_flags & SVC_STOPPED;
402 * Top thandle commit callback
404 * This callback will be called when all of sub transactions are committed.
406 * \param[in] th top thandle to be committed.
408 static void top_trans_committed_cb(struct top_multiple_thandle *tmt)
410 struct lu_target *lut;
413 LASSERT(atomic_read(&tmt->tmt_refcount) > 0);
415 top_multiple_thandle_dump(tmt, D_HA);
416 tmt->tmt_committed = 1;
417 lut = dt2lu_dev(tmt->tmt_master_sub_dt)->ld_site->ls_tgt;
418 if (distribute_txn_commit_thread_running(lut))
419 wake_up(&lut->lut_tdtd->tdtd_commit_thread_waitq);
423 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
424 struct dt_device *dt_dev)
426 struct sub_thandle *st;
428 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
429 if (st->st_dt == dt_dev)
434 EXPORT_SYMBOL(lookup_sub_thandle);
436 struct sub_thandle *create_sub_thandle(struct top_multiple_thandle *tmt,
437 struct dt_device *dt_dev)
439 struct sub_thandle *st;
443 RETURN(ERR_PTR(-ENOMEM));
445 INIT_LIST_HEAD(&st->st_sub_list);
446 INIT_LIST_HEAD(&st->st_cookie_list);
449 list_add(&st->st_sub_list, &tmt->tmt_sub_thandle_list);
453 static void sub_trans_commit_cb_internal(struct top_multiple_thandle *tmt,
454 struct thandle *sub_th, int err)
456 struct sub_thandle *st;
457 bool all_committed = true;
459 /* Check if all sub thandles are committed */
460 spin_lock(&tmt->tmt_sub_lock);
461 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
462 if (st->st_sub_th == sub_th) {
463 st->st_committed = 1;
466 if (!st->st_committed)
467 all_committed = false;
469 spin_unlock(&tmt->tmt_sub_lock);
471 if (tmt->tmt_result == 0)
472 tmt->tmt_result = err;
475 top_trans_committed_cb(tmt);
477 top_multiple_thandle_dump(tmt, D_INFO);
478 top_multiple_thandle_put(tmt);
483 * sub thandle commit callback
485 * Mark the sub thandle to be committed and if all sub thandle are committed
486 * notify the top thandle.
488 * \param[in] env execution environment
489 * \param[in] sub_th sub thandle being committed
490 * \param[in] cb commit callback
491 * \param[in] err trans result
493 static void sub_trans_commit_cb(struct lu_env *env,
494 struct thandle *sub_th,
495 struct dt_txn_commit_cb *cb, int err)
497 struct top_multiple_thandle *tmt = cb->dcb_data;
499 sub_trans_commit_cb_internal(tmt, sub_th, err);
502 static void sub_thandle_register_commit_cb(struct sub_thandle *st,
503 struct top_multiple_thandle *tmt)
505 LASSERT(st->st_sub_th != NULL);
506 top_multiple_thandle_get(tmt);
507 st->st_commit_dcb.dcb_func = sub_trans_commit_cb;
508 st->st_commit_dcb.dcb_data = tmt;
509 INIT_LIST_HEAD(&st->st_commit_dcb.dcb_linkage);
510 dt_trans_cb_add(st->st_sub_th, &st->st_commit_dcb);
514 * Sub thandle stop call back
516 * After sub thandle is stopped, it will call this callback to notify
519 * \param[in] th sub thandle to be stopped
520 * \param[in] rc result of sub trans
522 static void sub_trans_stop_cb(struct lu_env *env,
523 struct thandle *sub_th,
524 struct dt_txn_commit_cb *cb, int err)
526 struct sub_thandle *st;
527 struct top_multiple_thandle *tmt = cb->dcb_data;
530 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
534 if (st->st_dt == sub_th->th_dev) {
541 wake_up(&tmt->tmt_stop_waitq);
545 static void sub_thandle_register_stop_cb(struct sub_thandle *st,
546 struct top_multiple_thandle *tmt)
548 st->st_stop_dcb.dcb_func = sub_trans_stop_cb;
549 st->st_stop_dcb.dcb_data = tmt;
550 st->st_stop_dcb.dcb_flags = DCB_TRANS_STOP;
551 INIT_LIST_HEAD(&st->st_stop_dcb.dcb_linkage);
552 dt_trans_cb_add(st->st_sub_th, &st->st_stop_dcb);
558 * Create transaction handle for sub_thandle
560 * \param[in] env execution environment
561 * \param[in] th top thandle
562 * \param[in] st sub_thandle
564 * \retval 0 if creation succeeds.
565 * \retval negative errno if creation fails.
567 int sub_thandle_trans_create(const struct lu_env *env,
568 struct top_thandle *top_th,
569 struct sub_thandle *st)
571 struct thandle *sub_th;
573 sub_th = dt_trans_create(env, st->st_dt);
575 return PTR_ERR(sub_th);
577 sub_th->th_top = &top_th->tt_super;
578 st->st_sub_th = sub_th;
580 sub_th->th_wait_submit = 1;
581 sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
586 * Create the top transaction.
588 * Create the top transaction on the master device. It will create a top
589 * thandle and a sub thandle on the master device.
591 * \param[in] env execution environment
592 * \param[in] master_dev master_dev the top thandle will be created
594 * \retval pointer to the created thandle.
595 * \retval ERR_PTR(errno) if creation failed.
598 top_trans_create(const struct lu_env *env, struct dt_device *master_dev)
600 struct top_thandle *top_th;
601 struct thandle *child_th;
603 OBD_ALLOC_GFP(top_th, sizeof(*top_th), __GFP_IO);
605 return ERR_PTR(-ENOMEM);
607 top_th->tt_super.th_top = &top_th->tt_super;
609 if (master_dev != NULL) {
610 child_th = dt_trans_create(env, master_dev);
611 if (IS_ERR(child_th)) {
612 OBD_FREE_PTR(top_th);
616 child_th->th_top = &top_th->tt_super;
617 child_th->th_wait_submit = 1;
618 top_th->tt_master_sub_thandle = child_th;
620 top_th->tt_super.th_tags |= child_th->th_tags;
622 return &top_th->tt_super;
624 EXPORT_SYMBOL(top_trans_create);
627 * Declare write update transaction
629 * Check if there are updates being recorded in this transaction,
630 * it will write the record into the disk.
632 * \param[in] env execution environment
633 * \param[in] tmt top multiple transaction handle
635 * \retval 0 if writing succeeds
636 * \retval negative errno if writing fails
638 static int declare_updates_write(const struct lu_env *env,
639 struct top_multiple_thandle *tmt)
641 struct llog_update_record *record;
642 struct sub_thandle *st;
645 record = tmt->tmt_update_records->tur_update_records;
646 /* Declare update write for all other target */
647 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
648 if (st->st_sub_th == NULL)
651 rc = sub_declare_updates_write(env, record, st->st_sub_th,
652 tmt->tmt_record_size);
661 * Assign batchid to the distribute transaction.
663 * Assign batchid to the distribute transaction
665 * \param[in] tmt distribute transaction
667 static void distribute_txn_assign_batchid(struct top_multiple_thandle *new)
669 struct target_distribute_txn_data *tdtd;
670 struct dt_device *dt = new->tmt_master_sub_dt;
671 struct sub_thandle *st;
674 tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
675 spin_lock(&tdtd->tdtd_batchid_lock);
676 new->tmt_batchid = tdtd->tdtd_batchid++;
677 list_add_tail(&new->tmt_commit_list, &tdtd->tdtd_list);
678 spin_unlock(&tdtd->tdtd_batchid_lock);
679 list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
680 if (st->st_sub_th != NULL)
681 sub_thandle_register_commit_cb(st, new);
683 top_multiple_thandle_get(new);
684 top_multiple_thandle_dump(new, D_INFO);
688 * Insert distribute transaction to the distribute txn list.
690 * Insert distribute transaction to the distribute txn list.
692 * \param[in] new the distribute txn to be inserted.
694 void distribute_txn_insert_by_batchid(struct top_multiple_thandle *new)
696 struct dt_device *dt = new->tmt_master_sub_dt;
697 struct top_multiple_thandle *tmt;
698 struct target_distribute_txn_data *tdtd;
699 struct sub_thandle *st;
700 bool at_head = false;
703 tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
705 spin_lock(&tdtd->tdtd_batchid_lock);
706 list_for_each_entry_reverse(tmt, &tdtd->tdtd_list, tmt_commit_list) {
707 if (new->tmt_batchid > tmt->tmt_batchid) {
708 list_add(&new->tmt_commit_list, &tmt->tmt_commit_list);
712 if (list_empty(&new->tmt_commit_list)) {
714 list_add(&new->tmt_commit_list, &tdtd->tdtd_list);
716 spin_unlock(&tdtd->tdtd_batchid_lock);
718 list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
719 if (st->st_sub_th != NULL)
720 sub_thandle_register_commit_cb(st, new);
723 top_multiple_thandle_get(new);
724 top_multiple_thandle_dump(new, D_INFO);
725 if (new->tmt_committed && at_head)
726 wake_up(&tdtd->tdtd_commit_thread_waitq);
730 * Prepare cross-MDT operation.
732 * Create the update record buffer to record updates for cross-MDT operation,
733 * add master sub transaction to tt_sub_trans_list, and declare the update
736 * During updates packing, all of parameters will be packed in
737 * tur_update_params, and updates will be packed in tur_update_records.
738 * Then in transaction stop, parameters and updates will be merged
739 * into one updates buffer.
741 * And also master thandle will be added to the sub_th list, so it will be
742 * easy to track the commit status.
744 * \param[in] env execution environment
745 * \param[in] th top transaction handle
747 * \retval 0 if preparation succeeds.
748 * \retval negative errno if preparation fails.
750 static int prepare_multiple_node_trans(const struct lu_env *env,
751 struct top_multiple_thandle *tmt)
753 struct thandle_update_records *tur;
757 if (tmt->tmt_update_records == NULL) {
758 tur = &update_env_info(env)->uti_tur;
759 rc = check_and_prepare_update_record(env, tur);
763 tmt->tmt_update_records = tur;
764 distribute_txn_assign_batchid(tmt);
767 rc = declare_updates_write(env, tmt);
773 * start the top transaction.
775 * Start all of its sub transactions, then start master sub transaction.
777 * \param[in] env execution environment
778 * \param[in] master_dev master_dev the top thandle will be start
779 * \param[in] th top thandle
781 * \retval 0 if transaction start succeeds.
782 * \retval negative errno if start fails.
784 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
787 struct top_thandle *top_th = container_of(th, struct top_thandle,
789 struct sub_thandle *st;
790 struct top_multiple_thandle *tmt = top_th->tt_multiple_thandle;
796 top_th->tt_master_sub_thandle->th_sync = th->th_sync;
798 top_th->tt_master_sub_thandle->th_local = th->th_local;
799 top_th->tt_master_sub_thandle->th_tags = th->th_tags;
800 rc = dt_trans_start(env, top_th->tt_master_sub_thandle->th_dev,
801 top_th->tt_master_sub_thandle);
805 tmt = top_th->tt_multiple_thandle;
806 rc = prepare_multiple_node_trans(env, tmt);
810 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
811 if (st->st_sub_th == NULL)
814 st->st_sub_th->th_sync = th->th_sync;
816 st->st_sub_th->th_local = th->th_local;
817 st->st_sub_th->th_tags = th->th_tags;
818 rc = dt_trans_start(env, st->st_sub_th->th_dev,
823 LASSERT(st->st_started == 0);
830 EXPORT_SYMBOL(top_trans_start);
833 * Check whether we need write updates record
835 * Check if the updates for the top_thandle needs to be writen
836 * to all targets. Only if the transaction succeeds and the updates
837 * number > 2, it will write the updates,
839 * \params [in] top_th top thandle.
841 * \retval true if it needs to write updates
842 * \retval false if it does not need to write updates
844 static bool top_check_write_updates(struct top_thandle *top_th)
846 struct top_multiple_thandle *tmt;
847 struct thandle_update_records *tur;
849 /* Do not write updates to records if the transaction fails */
850 if (top_th->tt_super.th_result != 0)
853 tmt = top_th->tt_multiple_thandle;
857 tur = tmt->tmt_update_records;
861 /* Hmm, false update records, since the cross-MDT operation
862 * should includes both local and remote updates, so the
863 * updates count should >= 2 */
864 if (tur->tur_update_records == NULL ||
865 tur->tur_update_records->lur_update_rec.ur_update_count <= 1)
872 * Check if top transaction is stopped
874 * Check if top transaction is stopped, only if all sub transaction
875 * is stopped, then the top transaction is stopped.
877 * \param [in] top_th top thandle
879 * \retval true if the top transaction is stopped.
880 * \retval false if the top transaction is not stopped.
882 static bool top_trans_is_stopped(struct top_thandle *top_th)
884 struct top_multiple_thandle *tmt;
885 struct sub_thandle *st;
886 bool all_stopped = true;
888 tmt = top_th->tt_multiple_thandle;
889 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
890 if (!st->st_stopped && st->st_sub_th != NULL) {
895 if (st->st_result != 0 &&
896 top_th->tt_super.th_result == 0)
897 top_th->tt_super.th_result = st->st_result;
904 * Wait result of top transaction
906 * Wait until all sub transaction get its result.
908 * \param [in] top_th top thandle.
910 * \retval the result of top thandle.
912 static int top_trans_wait_result(struct top_thandle *top_th)
914 struct l_wait_info lwi = {0};
916 l_wait_event(top_th->tt_multiple_thandle->tmt_stop_waitq,
917 top_trans_is_stopped(top_th), &lwi);
919 RETURN(top_th->tt_super.th_result);
923 * Stop the top transaction.
925 * Stop the transaction on the master device first, then stop transactions
926 * on other sub devices.
928 * \param[in] env execution environment
929 * \param[in] master_dev master_dev the top thandle will be created
930 * \param[in] th top thandle
932 * \retval 0 if stop transaction succeeds.
933 * \retval negative errno if stop transaction fails.
935 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
938 struct top_thandle *top_th = container_of(th, struct top_thandle,
940 struct sub_thandle *st;
941 struct sub_thandle *master_st;
942 struct top_multiple_thandle *tmt;
943 struct thandle_update_records *tur;
944 bool write_updates = false;
948 if (likely(top_th->tt_multiple_thandle == NULL)) {
949 LASSERT(master_dev != NULL);
952 top_th->tt_master_sub_thandle->th_sync = th->th_sync;
954 top_th->tt_master_sub_thandle->th_local = th->th_local;
955 top_th->tt_master_sub_thandle->th_tags = th->th_tags;
956 rc = dt_trans_stop(env, master_dev,
957 top_th->tt_master_sub_thandle);
958 OBD_FREE_PTR(top_th);
962 tmt = top_th->tt_multiple_thandle;
963 tur = tmt->tmt_update_records;
965 /* Note: we need stop the master thandle first, then the stop
966 * callback will fill the master transno in the update logs,
967 * then these update logs will be sent to other MDTs */
968 /* get the master sub thandle */
969 master_st = lookup_sub_thandle(tmt, tmt->tmt_master_sub_dt);
970 write_updates = top_check_write_updates(top_th);
972 /* Step 1: write the updates log on Master MDT */
973 if (master_st != NULL && master_st->st_sub_th != NULL &&
975 struct llog_update_record *lur;
977 /* Merge the parameters and updates into one buffer */
978 rc = prepare_writing_updates(env, tmt);
980 CERROR("%s: cannot prepare updates: rc = %d\n",
981 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
983 write_updates = false;
984 GOTO(stop_master_trans, rc);
987 lur = tur->tur_update_records;
988 /* Write updates to the master MDT */
989 rc = sub_updates_write(env, lur, master_st);
991 /* Cleanup the common parameters in the update records,
992 * master transno callback might add more parameters.
993 * and we need merge the update records again in the
995 if (tur->tur_update_params != NULL)
996 lur->lur_update_rec.ur_param_count = 0;
999 CERROR("%s: write updates failed: rc = %d\n",
1000 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1002 write_updates = false;
1003 GOTO(stop_master_trans, rc);
1008 /* Step 2: Stop the transaction on the master MDT, and fill the
1009 * master transno in the update logs to other MDT. */
1010 if (master_st != NULL && master_st->st_sub_th != NULL) {
1012 master_st->st_sub_th->th_local = th->th_local;
1014 master_st->st_sub_th->th_sync = th->th_sync;
1015 master_st->st_sub_th->th_tags = th->th_tags;
1016 master_st->st_sub_th->th_result = th->th_result;
1017 rc = dt_trans_stop(env, master_st->st_dt, master_st->st_sub_th);
1018 /* If it does not write_updates, then we call submit callback
1019 * here, otherwise callback is done through
1020 * osd(osp)_trans_commit_cb() */
1021 if (!master_st->st_started &&
1022 !list_empty(&tmt->tmt_commit_list))
1023 sub_trans_commit_cb_internal(tmt,
1024 master_st->st_sub_th, rc);
1027 GOTO(stop_other_trans, rc);
1028 } else if (tur != NULL && tur->tur_update_records != NULL) {
1029 struct llog_update_record *lur;
1031 lur = tur->tur_update_records;
1032 if (lur->lur_update_rec.ur_master_transno == 0)
1033 /* Update master transno after master stop
1035 lur->lur_update_rec.ur_master_transno =
1036 tgt_th_info(env)->tti_transno;
1040 /* Step 3: write updates to other MDTs */
1041 if (write_updates) {
1042 struct llog_update_record *lur;
1044 /* Stop callback of master will add more updates and also update
1045 * master transno, so merge the parameters and updates into one
1047 rc = prepare_writing_updates(env, tmt);
1049 CERROR("%s: prepare updates failed: rc = %d\n",
1050 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1052 GOTO(stop_other_trans, rc);
1054 lur = tur->tur_update_records;
1055 list_for_each_entry(st, &tmt->tmt_sub_thandle_list,
1057 if (st->st_sub_th == NULL || st == master_st ||
1058 st->st_sub_th->th_result < 0)
1061 rc = sub_updates_write(env, lur, st);
1070 /* Step 4: Stop the transaction on other MDTs */
1071 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
1072 if (st == master_st || st->st_sub_th == NULL)
1076 st->st_sub_th->th_sync = th->th_sync;
1078 st->st_sub_th->th_local = th->th_local;
1079 st->st_sub_th->th_tags = th->th_tags;
1080 st->st_sub_th->th_result = th->th_result;
1081 rc = dt_trans_stop(env, st->st_sub_th->th_dev,
1083 if (unlikely(rc < 0 && th->th_result == 0))
1087 rc = top_trans_wait_result(top_th);
1089 tmt->tmt_result = rc;
1091 /* Balance for the refcount in top_trans_create, Note: if it is NOT
1092 * multiple node transaction, the top transaction will be destroyed. */
1093 top_multiple_thandle_put(tmt);
1094 OBD_FREE_PTR(top_th);
1097 EXPORT_SYMBOL(top_trans_stop);
1100 * Create top_multiple_thandle for top_thandle
1102 * Create top_mutilple_thandle to manage the mutiple node transaction
1103 * for top_thandle, and it also needs to add master sub thandle to the
1104 * sub trans list now.
1106 * \param[in] env execution environment
1107 * \param[in] top_th the top thandle
1109 * \retval 0 if creation succeeds
1110 * \retval negative errno if creation fails
1112 int top_trans_create_tmt(const struct lu_env *env,
1113 struct top_thandle *top_th)
1115 struct top_multiple_thandle *tmt;
1121 tmt->tmt_magic = TOP_THANDLE_MAGIC;
1122 INIT_LIST_HEAD(&tmt->tmt_sub_thandle_list);
1123 INIT_LIST_HEAD(&tmt->tmt_commit_list);
1124 atomic_set(&tmt->tmt_refcount, 1);
1125 spin_lock_init(&tmt->tmt_sub_lock);
1126 init_waitqueue_head(&tmt->tmt_stop_waitq);
1128 top_th->tt_multiple_thandle = tmt;
1133 static struct sub_thandle *
1134 create_sub_thandle_with_thandle(struct top_thandle *top_th,
1135 struct thandle *sub_th)
1137 struct sub_thandle *st;
1139 /* create and init sub th to the top trans list */
1140 st = create_sub_thandle(top_th->tt_multiple_thandle,
1145 st->st_sub_th = sub_th;
1147 sub_th->th_top = &top_th->tt_super;
1148 sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
1155 * Get sub thandle from the top thandle according to the sub dt_device.
1157 * \param[in] env execution environment
1158 * \param[in] th thandle on the top layer.
1159 * \param[in] sub_dt sub dt_device used to get sub transaction
1161 * \retval thandle of sub transaction if succeed
1162 * \retval PTR_ERR(errno) if failed
1164 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
1166 struct dt_device *sub_dt)
1168 struct sub_thandle *st = NULL;
1169 struct sub_thandle *master_st = NULL;
1170 struct top_thandle *top_th;
1171 struct thandle *sub_th = NULL;
1175 top_th = container_of(th, struct top_thandle, tt_super);
1177 if (likely(sub_dt == top_th->tt_master_sub_thandle->th_dev))
1178 RETURN(top_th->tt_master_sub_thandle);
1180 if (top_th->tt_multiple_thandle != NULL) {
1181 st = lookup_sub_thandle(top_th->tt_multiple_thandle, sub_dt);
1183 RETURN(st->st_sub_th);
1186 sub_th = dt_trans_create(env, sub_dt);
1190 /* Create top_multiple_thandle if necessary */
1191 if (top_th->tt_multiple_thandle == NULL) {
1192 struct top_multiple_thandle *tmt;
1194 rc = top_trans_create_tmt(env, top_th);
1196 GOTO(stop_trans, rc);
1198 tmt = top_th->tt_multiple_thandle;
1200 /* Add master sub th to the top trans list */
1201 tmt->tmt_master_sub_dt =
1202 top_th->tt_master_sub_thandle->th_dev;
1203 master_st = create_sub_thandle_with_thandle(top_th,
1204 top_th->tt_master_sub_thandle);
1205 if (IS_ERR(master_st)) {
1206 rc = PTR_ERR(master_st);
1208 GOTO(stop_trans, rc);
1212 /* create and init sub th to the top trans list */
1213 st = create_sub_thandle_with_thandle(top_th, sub_th);
1217 GOTO(stop_trans, rc);
1219 st->st_sub_th->th_wait_submit = 1;
1222 if (master_st != NULL) {
1223 list_del(&master_st->st_sub_list);
1224 OBD_FREE_PTR(master_st);
1226 sub_th->th_result = rc;
1227 dt_trans_stop(env, sub_dt, sub_th);
1228 sub_th = ERR_PTR(rc);
1233 EXPORT_SYMBOL(thandle_get_sub_by_dt);
1236 * Top multiple thandle destroy
1238 * Destroy multiple thandle and all its sub thandle.
1240 * \param[in] tmt top_multiple_thandle to be destroyed.
1242 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt)
1244 struct sub_thandle *st;
1245 struct sub_thandle *tmp;
1247 LASSERT(tmt->tmt_magic == TOP_THANDLE_MAGIC);
1248 list_for_each_entry_safe(st, tmp, &tmt->tmt_sub_thandle_list,
1250 struct sub_thandle_cookie *stc;
1251 struct sub_thandle_cookie *tmp;
1253 list_del(&st->st_sub_list);
1254 list_for_each_entry_safe(stc, tmp, &st->st_cookie_list,
1256 list_del(&stc->stc_list);
1263 EXPORT_SYMBOL(top_multiple_thandle_destroy);
1266 * Cancel the update log on MDTs
1268 * Cancel the update log on MDTs then destroy the thandle.
1270 * \param[in] env execution environment
1271 * \param[in] tmt the top multiple thandle whose updates records
1272 * will be cancelled.
1274 * \retval 0 if cancellation succeeds.
1275 * \retval negative errno if cancellation fails.
1277 static int distribute_txn_cancel_records(const struct lu_env *env,
1278 struct top_multiple_thandle *tmt)
1280 struct sub_thandle *st;
1283 top_multiple_thandle_dump(tmt, D_INFO);
1284 /* Cancel update logs on other MDTs */
1285 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
1286 struct llog_ctxt *ctxt;
1287 struct obd_device *obd;
1288 struct llog_cookie *cookie;
1289 struct sub_thandle_cookie *stc;
1292 obd = st->st_dt->dd_lu_dev.ld_obd;
1293 ctxt = llog_get_context(obd, LLOG_UPDATELOG_ORIG_CTXT);
1296 list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
1297 cookie = &stc->stc_cookie;
1298 if (fid_is_zero(&cookie->lgc_lgl.lgl_oi.oi_fid))
1301 rc = llog_cat_cancel_records(env, ctxt->loc_handle, 1,
1303 CDEBUG(D_HA, "%s: batchid %llu cancel update log "
1304 DOSTID ".%u : rc = %d\n", obd->obd_name,
1306 POSTID(&cookie->lgc_lgl.lgl_oi),
1307 cookie->lgc_index, rc);
1310 llog_ctxt_put(ctxt);
1317 * Check if there are committed transaction
1319 * Check if there are committed transaction in the distribute transaction
1320 * list, then cancel the update records for those committed transaction.
1321 * Because the distribute transaction in the list are sorted by batchid,
1322 * and cancellation will be done by batchid order, so we only check the first
1323 * the transaction(with lowest batchid) in the list.
1325 * \param[in] lod lod device where cancel thread is
1327 * \retval true if it is ready
1328 * \retval false if it is not ready
1330 static bool tdtd_ready_for_cancel_log(struct target_distribute_txn_data *tdtd)
1332 struct top_multiple_thandle *tmt = NULL;
1333 struct obd_device *obd = tdtd->tdtd_lut->lut_obd;
1336 spin_lock(&tdtd->tdtd_batchid_lock);
1337 if (!list_empty(&tdtd->tdtd_list)) {
1338 tmt = list_entry(tdtd->tdtd_list.next,
1339 struct top_multiple_thandle, tmt_commit_list);
1340 if (tmt->tmt_committed &&
1341 (!obd->obd_recovering || (obd->obd_recovering &&
1342 tmt->tmt_batchid <= tdtd->tdtd_committed_batchid)))
1345 spin_unlock(&tdtd->tdtd_batchid_lock);
1350 struct distribute_txn_bid_data {
1351 struct dt_txn_commit_cb dtbd_cb;
1352 struct target_distribute_txn_data *dtbd_tdtd;
1357 * callback of updating commit batchid
1359 * Updating commit batchid then wake up the commit thread to cancel the
1362 * \param[in]env execution environment
1363 * \param[in]th thandle to updating commit batchid
1364 * \param[in]cb commit callback
1365 * \param[in]err result of thandle
1367 static void distribute_txn_batchid_cb(struct lu_env *env,
1369 struct dt_txn_commit_cb *cb,
1372 struct distribute_txn_bid_data *dtbd = NULL;
1373 struct target_distribute_txn_data *tdtd;
1375 dtbd = container_of0(cb, struct distribute_txn_bid_data, dtbd_cb);
1376 tdtd = dtbd->dtbd_tdtd;
1378 CDEBUG(D_HA, "%s: %llu batchid updated\n",
1379 tdtd->tdtd_lut->lut_obd->obd_name, dtbd->dtbd_batchid);
1380 spin_lock(&tdtd->tdtd_batchid_lock);
1381 if (dtbd->dtbd_batchid > tdtd->tdtd_committed_batchid &&
1382 !tdtd->tdtd_lut->lut_obd->obd_no_transno)
1383 tdtd->tdtd_committed_batchid = dtbd->dtbd_batchid;
1384 spin_unlock(&tdtd->tdtd_batchid_lock);
1385 atomic_dec(&tdtd->tdtd_refcount);
1386 wake_up(&tdtd->tdtd_commit_thread_waitq);
1392 * Update the commit batchid in disk
1394 * Update commit batchid in the disk, after this is committed, it can start
1395 * to cancel the update records.
1397 * \param[in] env execution environment
1398 * \param[in] tdtd distribute transaction structure
1399 * \param[in] batchid commit batchid to be updated
1401 * \retval 0 if update succeeds.
1402 * \retval negative errno if update fails.
1405 distribute_txn_commit_batchid_update(const struct lu_env *env,
1406 struct target_distribute_txn_data *tdtd,
1409 struct distribute_txn_bid_data *dtbd = NULL;
1417 OBD_ALLOC_PTR(dtbd);
1420 dtbd->dtbd_batchid = batchid;
1421 dtbd->dtbd_tdtd = tdtd;
1422 dtbd->dtbd_cb.dcb_func = distribute_txn_batchid_cb;
1423 atomic_inc(&tdtd->tdtd_refcount);
1425 th = dt_trans_create(env, tdtd->tdtd_lut->lut_bottom);
1428 RETURN(PTR_ERR(th));
1431 tmp = cpu_to_le64(batchid);
1433 buf.lb_len = sizeof(tmp);
1436 rc = dt_declare_record_write(env, tdtd->tdtd_batchid_obj, &buf, off,
1441 rc = dt_trans_start_local(env, tdtd->tdtd_lut->lut_bottom, th);
1445 rc = dt_trans_cb_add(th, &dtbd->dtbd_cb);
1449 rc = dt_record_write(env, tdtd->tdtd_batchid_obj, &buf,
1452 CDEBUG(D_INFO, "%s: update batchid "LPU64": rc = %d\n",
1453 tdtd->tdtd_lut->lut_obd->obd_name, batchid, rc);
1456 dt_trans_stop(env, tdtd->tdtd_lut->lut_bottom, th);
1463 * Init commit batchid for distribute transaction.
1465 * Initialize the batchid object and get commit batchid from the object.
1467 * \param[in] env execution environment
1468 * \param[in] tdtd distribute transaction whose batchid is initialized.
1470 * \retval 0 if initialization succeeds.
1471 * \retval negative errno if initialization fails.
1474 distribute_txn_commit_batchid_init(const struct lu_env *env,
1475 struct target_distribute_txn_data *tdtd)
1477 struct tgt_thread_info *tti = tgt_th_info(env);
1478 struct lu_target *lut = tdtd->tdtd_lut;
1479 struct lu_attr *attr = &tti->tti_attr;
1480 struct lu_fid *fid = &tti->tti_fid1;
1481 struct dt_object_format *dof = &tti->tti_u.update.tti_update_dof;
1482 struct dt_object *dt_obj = NULL;
1489 memset(attr, 0, sizeof(*attr));
1490 attr->la_valid = LA_MODE;
1491 attr->la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1492 dof->dof_type = dt_mode_to_dft(S_IFREG);
1494 lu_local_obj_fid(fid, BATCHID_COMMITTED_OID);
1496 dt_obj = dt_find_or_create(env, lut->lut_bottom, fid, dof,
1498 if (IS_ERR(dt_obj)) {
1499 rc = PTR_ERR(dt_obj);
1504 tdtd->tdtd_batchid_obj = dt_obj;
1507 buf.lb_len = sizeof(tmp);
1509 rc = dt_read(env, dt_obj, &buf, &off);
1510 if (rc < 0 || (rc < buf.lb_len && rc > 0)) {
1511 CERROR("%s can't read last committed batchid: rc = %d\n",
1512 tdtd->tdtd_lut->lut_obd->obd_name, rc);
1516 } else if (rc == buf.lb_len) {
1517 tdtd->tdtd_committed_batchid = le64_to_cpu(tmp);
1518 CDEBUG(D_HA, "%s: committed batchid %llu\n",
1519 tdtd->tdtd_lut->lut_obd->obd_name,
1520 tdtd->tdtd_committed_batchid);
1525 if (rc < 0 && dt_obj != NULL) {
1526 lu_object_put(env, &dt_obj->do_lu);
1527 tdtd->tdtd_batchid_obj = NULL;
1533 * manage the distribute transaction thread
1535 * Distribute transaction are linked to the list, and once the distribute
1536 * transaction is committed, it will update the last committed batchid first,
1537 * after it is committed, it will cancel the records.
1539 * \param[in] _arg argument for commit thread
1541 * \retval 0 if thread is running successfully
1542 * \retval negative errno if the thread can not be run.
1544 static int distribute_txn_commit_thread(void *_arg)
1546 struct target_distribute_txn_data *tdtd = _arg;
1547 struct lu_target *lut = tdtd->tdtd_lut;
1548 struct ptlrpc_thread *thread = &lut->lut_tdtd_commit_thread;
1549 struct l_wait_info lwi = { 0 };
1551 struct list_head list;
1553 struct top_multiple_thandle *tmt;
1554 struct top_multiple_thandle *tmp;
1555 __u64 batchid = 0, committed;
1559 rc = lu_env_init(&env, LCT_LOCAL | LCT_MD_THREAD);
1563 spin_lock(&tdtd->tdtd_batchid_lock);
1564 thread->t_flags = SVC_RUNNING;
1565 spin_unlock(&tdtd->tdtd_batchid_lock);
1566 wake_up(&thread->t_ctl_waitq);
1567 INIT_LIST_HEAD(&list);
1569 CDEBUG(D_HA, "%s: start commit thread committed batchid "LPU64"\n",
1570 tdtd->tdtd_lut->lut_obd->obd_name,
1571 tdtd->tdtd_committed_batchid);
1573 while (distribute_txn_commit_thread_running(lut)) {
1574 spin_lock(&tdtd->tdtd_batchid_lock);
1575 list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
1577 if (tmt->tmt_committed == 0)
1580 /* Note: right now, replay is based on master MDT
1581 * transno, but cancellation is based on batchid.
1582 * so we do not try to cancel the update log until
1583 * the recoverying is done, unless the update records
1584 * batchid < committed_batchid. */
1585 if (tmt->tmt_batchid <= tdtd->tdtd_committed_batchid) {
1586 list_move_tail(&tmt->tmt_commit_list, &list);
1587 } else if (!tdtd->tdtd_lut->lut_obd->obd_recovering) {
1588 LASSERTF(tmt->tmt_batchid >= batchid,
1589 "tmt %p tmt_batchid: "LPU64", batchid "
1590 LPU64"\n", tmt, tmt->tmt_batchid,
1592 /* There are three types of distribution
1593 * transaction result
1595 * 1. If tmt_result < 0, it means the
1596 * distribution transaction fails, which should
1597 * be rare, because once declare phase succeeds,
1598 * the operation should succeeds anyway. Note in
1599 * this case, we will still update batchid so
1600 * cancellation would be stopped.
1602 * 2. If tmt_result == 0, it means the
1603 * distribution transaction succeeds, and we
1604 * will update batchid.
1606 * 3. If tmt_result > 0, it means distribute
1607 * transaction is not yet committed on every
1608 * node, but we need release this tmt before
1609 * that, which usuually happens during umount.
1611 if (tmt->tmt_result <= 0)
1612 batchid = tmt->tmt_batchid;
1613 list_move_tail(&tmt->tmt_commit_list, &list);
1616 spin_unlock(&tdtd->tdtd_batchid_lock);
1618 CDEBUG(D_HA, "%s: batchid: "LPU64" committed batchid "
1619 LPU64"\n", tdtd->tdtd_lut->lut_obd->obd_name, batchid,
1620 tdtd->tdtd_committed_batchid);
1621 /* update globally committed on a storage */
1622 if (batchid > tdtd->tdtd_committed_batchid) {
1623 rc = distribute_txn_commit_batchid_update(&env, tdtd,
1628 /* cancel the records for committed batchid's */
1629 /* XXX: should we postpone cancel's till the end of recovery? */
1630 committed = tdtd->tdtd_committed_batchid;
1631 list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
1632 if (tmt->tmt_batchid > committed)
1634 list_del_init(&tmt->tmt_commit_list);
1635 if (tmt->tmt_result <= 0)
1636 distribute_txn_cancel_records(&env, tmt);
1637 top_multiple_thandle_put(tmt);
1640 l_wait_event(tdtd->tdtd_commit_thread_waitq,
1641 !distribute_txn_commit_thread_running(lut) ||
1642 committed < tdtd->tdtd_committed_batchid ||
1643 tdtd_ready_for_cancel_log(tdtd), &lwi);
1646 l_wait_event(tdtd->tdtd_commit_thread_waitq,
1647 atomic_read(&tdtd->tdtd_refcount) == 0, &lwi);
1649 spin_lock(&tdtd->tdtd_batchid_lock);
1650 list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
1652 list_move_tail(&tmt->tmt_commit_list, &list);
1653 spin_unlock(&tdtd->tdtd_batchid_lock);
1655 CDEBUG(D_INFO, "%s stopping distribute txn commit thread.\n",
1656 tdtd->tdtd_lut->lut_obd->obd_name);
1657 list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
1658 list_del_init(&tmt->tmt_commit_list);
1659 top_multiple_thandle_dump(tmt, D_HA);
1660 top_multiple_thandle_put(tmt);
1663 thread->t_flags = SVC_STOPPED;
1665 wake_up(&thread->t_ctl_waitq);
1671 * Start llog cancel thread
1673 * Start llog cancel(master/slave) thread on LOD
1675 * \param[in]lclt cancel log thread to be started.
1677 * \retval 0 if the thread is started successfully.
1678 * \retval negative errno if the thread is not being
1681 int distribute_txn_init(const struct lu_env *env,
1682 struct lu_target *lut,
1683 struct target_distribute_txn_data *tdtd,
1686 struct task_struct *task;
1687 struct l_wait_info lwi = { 0 };
1691 INIT_LIST_HEAD(&tdtd->tdtd_list);
1692 INIT_LIST_HEAD(&tdtd->tdtd_replay_finish_list);
1693 INIT_LIST_HEAD(&tdtd->tdtd_replay_list);
1694 spin_lock_init(&tdtd->tdtd_batchid_lock);
1695 spin_lock_init(&tdtd->tdtd_replay_list_lock);
1696 tdtd->tdtd_replay_handler = distribute_txn_replay_handle;
1697 tdtd->tdtd_replay_ready = 0;
1699 tdtd->tdtd_batchid = lut->lut_last_transno + 1;
1701 init_waitqueue_head(&lut->lut_tdtd_commit_thread.t_ctl_waitq);
1702 init_waitqueue_head(&tdtd->tdtd_commit_thread_waitq);
1703 atomic_set(&tdtd->tdtd_refcount, 0);
1705 tdtd->tdtd_lut = lut;
1706 rc = distribute_txn_commit_batchid_init(env, tdtd);
1710 task = kthread_run(distribute_txn_commit_thread, tdtd, "tdtd-%u",
1713 RETURN(PTR_ERR(task));
1715 l_wait_event(lut->lut_tdtd_commit_thread.t_ctl_waitq,
1716 distribute_txn_commit_thread_running(lut) ||
1717 distribute_txn_commit_thread_stopped(lut), &lwi);
1720 EXPORT_SYMBOL(distribute_txn_init);
1723 * Stop llog cancel thread
1725 * Stop llog cancel(master/slave) thread on LOD and also destory
1726 * all of transaction in the list.
1728 * \param[in]lclt cancel log thread to be stopped.
1730 void distribute_txn_fini(const struct lu_env *env,
1731 struct target_distribute_txn_data *tdtd)
1733 struct lu_target *lut = tdtd->tdtd_lut;
1735 /* Stop cancel thread */
1736 if (lut == NULL || !distribute_txn_commit_thread_running(lut))
1739 spin_lock(&tdtd->tdtd_batchid_lock);
1740 lut->lut_tdtd_commit_thread.t_flags = SVC_STOPPING;
1741 spin_unlock(&tdtd->tdtd_batchid_lock);
1742 wake_up(&tdtd->tdtd_commit_thread_waitq);
1743 wait_event(lut->lut_tdtd_commit_thread.t_ctl_waitq,
1744 lut->lut_tdtd_commit_thread.t_flags & SVC_STOPPED);
1746 dtrq_list_destroy(tdtd);
1747 if (tdtd->tdtd_batchid_obj != NULL) {
1748 lu_object_put(env, &tdtd->tdtd_batchid_obj->do_lu);
1749 tdtd->tdtd_batchid_obj = NULL;
1752 EXPORT_SYMBOL(distribute_txn_fini);