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) 2015, 2017, 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 batchid %llu\n",
76 tmt->tmt_master_sub_dt ?
77 tmt->tmt_master_sub_dt->dd_lu_dev.ld_obd->obd_name :
79 tmt, atomic_read(&tmt->tmt_refcount), tmt->tmt_committed,
80 tmt->tmt_result, tmt->tmt_batchid);
82 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
83 struct sub_thandle_cookie *stc;
85 CDEBUG(mask, "st %p obd %s committed %d started %d stopped %d "
86 "result %d sub_th %p\n",
87 st, st->st_dt->dd_lu_dev.ld_obd->obd_name,
88 st->st_committed, st->st_started, st->st_stopped,
89 st->st_result, st->st_sub_th);
91 list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
92 CDEBUG(mask, " cookie "DFID".%u\n",
93 PFID(&stc->stc_cookie.lgc_lgl.lgl_oi.oi_fid),
94 stc->stc_cookie.lgc_index);
100 * Declare write update to sub device
102 * Declare Write updates llog records to the sub device during distribute
105 * \param[in] env execution environment
106 * \param[in] record update records being written
107 * \param[in] sub_th sub transaction handle
108 * \param[in] record_size total update record size
110 * \retval 0 if writing succeeds
111 * \retval negative errno if writing fails
113 static int sub_declare_updates_write(const struct lu_env *env,
114 struct llog_update_record *record,
115 struct thandle *sub_th, size_t record_size)
117 struct llog_ctxt *ctxt;
118 struct dt_device *dt = sub_th->th_dev;
119 int left = record_size;
122 /* If ctxt is NULL, it means not need to write update,
123 * for example if the the OSP is used to connect to OST */
124 ctxt = llog_get_context(dt->dd_lu_dev.ld_obd,
125 LLOG_UPDATELOG_ORIG_CTXT);
127 /* Not ready to record updates yet. */
128 if (ctxt == NULL || ctxt->loc_handle == NULL) {
133 rc = llog_declare_add(env, ctxt->loc_handle,
134 &record->lur_hdr, sub_th);
138 while (left > ctxt->loc_chunk_size) {
139 rc = llog_declare_add(env, ctxt->loc_handle,
140 &record->lur_hdr, sub_th);
144 left -= ctxt->loc_chunk_size;
154 * write update to sub device
156 * Write llog update record to the sub device during distribute
157 * transaction. If it succeeds, llog cookie of the record will be
158 * returned by @cookie.
160 * \param[in] env execution environment
161 * \param[in] record update records being written
162 * \param[in] sub_th sub transaction handle
163 * \param[out] cookie llog cookie of the update record.
165 * \retval 1 if writing succeeds
166 * \retval negative errno if writing fails
168 static int sub_updates_write(const struct lu_env *env,
169 struct llog_update_record *record,
170 struct sub_thandle *sub_th)
172 struct dt_device *dt = sub_th->st_dt;
173 struct llog_ctxt *ctxt;
174 struct llog_update_record *lur = NULL;
175 __u32 update_count = 0;
176 __u32 param_count = 0;
177 __u32 last_update_count = 0;
178 __u32 last_param_count = 0;
182 struct sub_thandle_cookie *stc;
188 ctxt = llog_get_context(dt->dd_lu_dev.ld_obd,
189 LLOG_UPDATELOG_ORIG_CTXT);
190 /* If ctxt == NULL, then it means updates on OST (only happens
191 * during migration), and we do not track those updates for now */
192 /* If ctxt->loc_handle == NULL, then it does not need to record
193 * update, usually happens in error handler path */
194 if (ctxt == NULL || ctxt->loc_handle == NULL) {
199 /* Since the cross-MDT updates will includes both local
200 * and remote updates, the update ops count must > 1 */
201 LASSERT(record->lur_update_rec.ur_update_count > 1);
202 LASSERTF(record->lur_hdr.lrh_len == llog_update_record_size(record),
203 "lrh_len %u record_size %zu\n", record->lur_hdr.lrh_len,
204 llog_update_record_size(record));
207 * If its size > llog chunk_size, then write current chunk to the update
208 * llog, NB the padding should >= LLOG_MIN_REC_SIZE.
210 * So check padding length is either >= LLOG_MIN_REC_SIZE or is 0
211 * (record length just matches the chunk size).
214 reclen = record->lur_hdr.lrh_len;
215 if (reclen + LLOG_MIN_REC_SIZE <= ctxt->loc_chunk_size ||
216 reclen == ctxt->loc_chunk_size) {
219 GOTO(llog_put, rc = -ENOMEM);
220 INIT_LIST_HEAD(&stc->stc_list);
222 rc = llog_add(env, ctxt->loc_handle, &record->lur_hdr,
223 &stc->stc_cookie, sub_th->st_sub_th);
225 CDEBUG(D_INFO, "%s: Add update log "DFID".%u: rc = %d\n",
226 dt->dd_lu_dev.ld_obd->obd_name,
227 PFID(&stc->stc_cookie.lgc_lgl.lgl_oi.oi_fid),
228 stc->stc_cookie.lgc_index, rc);
231 list_add(&stc->stc_list, &sub_th->st_cookie_list);
240 /* Split the records into chunk_size update record */
241 OBD_ALLOC_LARGE(lur, ctxt->loc_chunk_size);
243 GOTO(llog_put, rc = -ENOMEM);
245 memcpy(lur, &record->lur_hdr, sizeof(record->lur_hdr));
246 lur->lur_update_rec.ur_update_count = 0;
247 lur->lur_update_rec.ur_param_count = 0;
248 start = (char *)&record->lur_update_rec.ur_ops;
251 if (update_count < record->lur_update_rec.ur_update_count)
252 next = (char *)update_op_next_op(
253 (struct update_op *)cur);
254 else if (param_count < record->lur_update_rec.ur_param_count)
255 next = (char *)update_param_next_param(
256 (struct update_param *)cur);
260 reclen = __llog_update_record_size(
261 __update_records_size(next - start));
262 if ((reclen + LLOG_MIN_REC_SIZE <= ctxt->loc_chunk_size ||
263 reclen == ctxt->loc_chunk_size) &&
268 record->lur_update_rec.ur_update_count)
270 else if (param_count <
271 record->lur_update_rec.ur_param_count)
276 lur->lur_update_rec.ur_update_count = update_count -
278 lur->lur_update_rec.ur_param_count = param_count -
280 memcpy(&lur->lur_update_rec.ur_ops, start, cur - start);
281 lur->lur_hdr.lrh_len = llog_update_record_size(lur);
283 LASSERT(lur->lur_hdr.lrh_len ==
284 __llog_update_record_size(
285 __update_records_size(cur - start)));
286 LASSERT(lur->lur_hdr.lrh_len <= ctxt->loc_chunk_size);
288 update_records_dump(&lur->lur_update_rec, D_INFO, true);
292 GOTO(llog_put, rc = -ENOMEM);
293 INIT_LIST_HEAD(&stc->stc_list);
295 rc = llog_add(env, ctxt->loc_handle, &lur->lur_hdr,
296 &stc->stc_cookie, sub_th->st_sub_th);
298 CDEBUG(D_INFO, "%s: Add update log "DFID".%u: rc = %d\n",
299 dt->dd_lu_dev.ld_obd->obd_name,
300 PFID(&stc->stc_cookie.lgc_lgl.lgl_oi.oi_fid),
301 stc->stc_cookie.lgc_index, rc);
304 list_add(&stc->stc_list, &sub_th->st_cookie_list);
311 last_update_count = update_count;
312 last_param_count = param_count;
314 lur->lur_update_rec.ur_update_count = 0;
315 lur->lur_update_rec.ur_param_count = 0;
316 lur->lur_update_rec.ur_flags |= UPDATE_RECORD_CONTINUE;
321 OBD_FREE_LARGE(lur, ctxt->loc_chunk_size);
328 * Prepare the update records.
330 * Merge params and ops into the update records, then initializing
333 * During transaction execution phase, parameters and update ops
334 * are collected in two different buffers (see lod_updates_pack()),
335 * during transaction stop, it needs to be merged in one buffer,
336 * so it will be written in the update log.
338 * \param[in] env execution environment
339 * \param[in] tmt top_multiple_thandle for distribute txn
341 * \retval 0 if merging succeeds.
342 * \retval negaitive errno if merging fails.
344 static int prepare_writing_updates(const struct lu_env *env,
345 struct top_multiple_thandle *tmt)
347 struct thandle_update_records *tur = tmt->tmt_update_records;
348 struct llog_update_record *lur;
349 struct update_params *params;
353 if (tur == NULL || tur->tur_update_records == NULL ||
354 tur->tur_update_params == NULL)
357 lur = tur->tur_update_records;
358 /* Extends the update records buffer if needed */
359 params_size = update_params_size(tur->tur_update_params,
360 tur->tur_update_param_count);
361 LASSERT(lur->lur_update_rec.ur_param_count == 0);
362 update_size = llog_update_record_size(lur);
363 if (cfs_size_round(update_size + params_size) >
364 tur->tur_update_records_buf_size) {
367 rc = tur_update_records_extend(tur,
368 cfs_size_round(update_size + params_size));
372 lur = tur->tur_update_records;
375 params = update_records_get_params(&lur->lur_update_rec);
376 memcpy(params, tur->tur_update_params, params_size);
378 lur->lur_update_rec.ur_param_count = tur->tur_update_param_count;
379 lur->lur_update_rec.ur_batchid = tmt->tmt_batchid;
380 /* Init update record header */
381 lur->lur_hdr.lrh_len = llog_update_record_size(lur);
382 lur->lur_hdr.lrh_type = UPDATE_REC;
384 /* Dump updates for debugging purpose */
385 update_records_dump(&lur->lur_update_rec, D_INFO, true);
391 * Top thandle commit callback
393 * This callback will be called when all of sub transactions are committed.
395 * \param[in] th top thandle to be committed.
397 static void top_trans_committed_cb(struct top_multiple_thandle *tmt)
399 struct lu_target *lut;
402 LASSERT(atomic_read(&tmt->tmt_refcount) > 0);
404 top_multiple_thandle_dump(tmt, D_HA);
405 tmt->tmt_committed = 1;
406 lut = dt2lu_dev(tmt->tmt_master_sub_dt)->ld_site->ls_tgt;
407 if (lut->lut_tdtd && lut->lut_tdtd->tdtd_commit_task)
408 wake_up_process(lut->lut_tdtd->tdtd_commit_task);
413 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
414 struct dt_device *dt_dev)
416 struct sub_thandle *st;
418 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
419 if (st->st_dt == dt_dev)
424 EXPORT_SYMBOL(lookup_sub_thandle);
426 struct sub_thandle *create_sub_thandle(struct top_multiple_thandle *tmt,
427 struct dt_device *dt_dev)
429 struct sub_thandle *st;
433 RETURN(ERR_PTR(-ENOMEM));
435 INIT_LIST_HEAD(&st->st_sub_list);
436 INIT_LIST_HEAD(&st->st_cookie_list);
439 list_add(&st->st_sub_list, &tmt->tmt_sub_thandle_list);
443 static void sub_trans_commit_cb_internal(struct top_multiple_thandle *tmt,
444 struct thandle *sub_th, int err)
446 struct sub_thandle *st;
447 bool all_committed = true;
449 /* Check if all sub thandles are committed */
450 spin_lock(&tmt->tmt_sub_lock);
451 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
452 if (st->st_sub_th == sub_th) {
453 st->st_committed = 1;
456 if (!st->st_committed)
457 all_committed = false;
459 spin_unlock(&tmt->tmt_sub_lock);
461 if (tmt->tmt_result == 0)
462 tmt->tmt_result = err;
465 top_trans_committed_cb(tmt);
467 top_multiple_thandle_dump(tmt, D_INFO);
468 top_multiple_thandle_put(tmt);
473 * sub thandle commit callback
475 * Mark the sub thandle to be committed and if all sub thandle are committed
476 * notify the top thandle.
478 * \param[in] env execution environment
479 * \param[in] sub_th sub thandle being committed
480 * \param[in] cb commit callback
481 * \param[in] err trans result
483 static void sub_trans_commit_cb(struct lu_env *env,
484 struct thandle *sub_th,
485 struct dt_txn_commit_cb *cb, int err)
487 struct top_multiple_thandle *tmt = cb->dcb_data;
489 sub_trans_commit_cb_internal(tmt, sub_th, err);
492 static void sub_thandle_register_commit_cb(struct sub_thandle *st,
493 struct top_multiple_thandle *tmt)
495 LASSERT(st->st_sub_th != NULL);
496 top_multiple_thandle_get(tmt);
497 st->st_commit_dcb.dcb_func = sub_trans_commit_cb;
498 st->st_commit_dcb.dcb_data = tmt;
499 INIT_LIST_HEAD(&st->st_commit_dcb.dcb_linkage);
500 dt_trans_cb_add(st->st_sub_th, &st->st_commit_dcb);
504 * Sub thandle stop call back
506 * After sub thandle is stopped, it will call this callback to notify
509 * \param[in] th sub thandle to be stopped
510 * \param[in] rc result of sub trans
512 static void sub_trans_stop_cb(struct lu_env *env,
513 struct thandle *sub_th,
514 struct dt_txn_commit_cb *cb, int err)
516 struct sub_thandle *st;
517 struct top_multiple_thandle *tmt = cb->dcb_data;
520 spin_lock(&tmt->tmt_sub_lock);
521 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
525 if (st->st_dt == sub_th->th_dev) {
531 spin_unlock(&tmt->tmt_sub_lock);
533 wake_up(&tmt->tmt_stop_waitq);
537 static void sub_thandle_register_stop_cb(struct sub_thandle *st,
538 struct top_multiple_thandle *tmt)
540 st->st_stop_dcb.dcb_func = sub_trans_stop_cb;
541 st->st_stop_dcb.dcb_data = tmt;
542 st->st_stop_dcb.dcb_flags = DCB_TRANS_STOP;
543 INIT_LIST_HEAD(&st->st_stop_dcb.dcb_linkage);
544 dt_trans_cb_add(st->st_sub_th, &st->st_stop_dcb);
550 * Create transaction handle for sub_thandle
552 * \param[in] env execution environment
553 * \param[in] th top thandle
554 * \param[in] st sub_thandle
556 * \retval 0 if creation succeeds.
557 * \retval negative errno if creation fails.
559 int sub_thandle_trans_create(const struct lu_env *env,
560 struct top_thandle *top_th,
561 struct sub_thandle *st)
563 struct thandle *sub_th;
565 sub_th = dt_trans_create(env, st->st_dt);
567 return PTR_ERR(sub_th);
569 sub_th->th_top = &top_th->tt_super;
570 st->st_sub_th = sub_th;
572 sub_th->th_wait_submit = 1;
573 sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
578 * Create the top transaction.
580 * Create the top transaction on the master device. It will create a top
581 * thandle and a sub thandle on the master device.
583 * \param[in] env execution environment
584 * \param[in] master_dev master_dev the top thandle will be created
586 * \retval pointer to the created thandle.
587 * \retval ERR_PTR(errno) if creation failed.
590 top_trans_create(const struct lu_env *env, struct dt_device *master_dev)
592 struct top_thandle *top_th;
593 struct thandle *child_th;
595 OBD_ALLOC_GFP(top_th, sizeof(*top_th), __GFP_IO);
597 return ERR_PTR(-ENOMEM);
599 top_th->tt_super.th_top = &top_th->tt_super;
601 if (master_dev != NULL) {
602 child_th = dt_trans_create(env, master_dev);
603 if (IS_ERR(child_th)) {
604 OBD_FREE_PTR(top_th);
608 child_th->th_top = &top_th->tt_super;
609 child_th->th_wait_submit = 1;
610 top_th->tt_master_sub_thandle = child_th;
612 return &top_th->tt_super;
614 EXPORT_SYMBOL(top_trans_create);
617 * Declare write update transaction
619 * Check if there are updates being recorded in this transaction,
620 * it will write the record into the disk.
622 * \param[in] env execution environment
623 * \param[in] tmt top multiple transaction handle
625 * \retval 0 if writing succeeds
626 * \retval negative errno if writing fails
628 static int declare_updates_write(const struct lu_env *env,
629 struct top_multiple_thandle *tmt)
631 struct llog_update_record *record;
632 struct sub_thandle *st;
635 record = tmt->tmt_update_records->tur_update_records;
636 /* Declare update write for all other target */
637 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
638 if (st->st_sub_th == NULL)
641 rc = sub_declare_updates_write(env, record, st->st_sub_th,
642 tmt->tmt_record_size);
651 * Assign batchid to the distribute transaction.
653 * Assign batchid to the distribute transaction
655 * \param[in] tmt distribute transaction
657 static void distribute_txn_assign_batchid(struct top_multiple_thandle *new)
659 struct target_distribute_txn_data *tdtd;
660 struct dt_device *dt = new->tmt_master_sub_dt;
661 struct sub_thandle *st;
664 tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
665 spin_lock(&tdtd->tdtd_batchid_lock);
666 new->tmt_batchid = tdtd->tdtd_batchid++;
667 list_add_tail(&new->tmt_commit_list, &tdtd->tdtd_list);
668 spin_unlock(&tdtd->tdtd_batchid_lock);
669 list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
670 if (st->st_sub_th != NULL)
671 sub_thandle_register_commit_cb(st, new);
673 top_multiple_thandle_get(new);
674 top_multiple_thandle_dump(new, D_INFO);
678 * Insert distribute transaction to the distribute txn list.
680 * Insert distribute transaction to the distribute txn list.
682 * \param[in] new the distribute txn to be inserted.
684 void distribute_txn_insert_by_batchid(struct top_multiple_thandle *new)
686 struct dt_device *dt = new->tmt_master_sub_dt;
687 struct top_multiple_thandle *tmt;
688 struct target_distribute_txn_data *tdtd;
689 struct sub_thandle *st;
690 bool at_head = false;
693 tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
695 spin_lock(&tdtd->tdtd_batchid_lock);
696 list_for_each_entry_reverse(tmt, &tdtd->tdtd_list, tmt_commit_list) {
697 if (new->tmt_batchid > tmt->tmt_batchid) {
698 list_add(&new->tmt_commit_list, &tmt->tmt_commit_list);
702 if (list_empty(&new->tmt_commit_list)) {
704 list_add(&new->tmt_commit_list, &tdtd->tdtd_list);
706 spin_unlock(&tdtd->tdtd_batchid_lock);
708 list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
709 if (st->st_sub_th != NULL)
710 sub_thandle_register_commit_cb(st, new);
713 top_multiple_thandle_get(new);
714 top_multiple_thandle_dump(new, D_INFO);
715 if (new->tmt_committed && at_head && tdtd->tdtd_commit_task)
716 wake_up_process(tdtd->tdtd_commit_task);
720 * Prepare cross-MDT operation.
722 * Create the update record buffer to record updates for cross-MDT operation,
723 * add master sub transaction to tt_sub_trans_list, and declare the update
726 * During updates packing, all of parameters will be packed in
727 * tur_update_params, and updates will be packed in tur_update_records.
728 * Then in transaction stop, parameters and updates will be merged
729 * into one updates buffer.
731 * And also master thandle will be added to the sub_th list, so it will be
732 * easy to track the commit status.
734 * \param[in] env execution environment
735 * \param[in] th top transaction handle
737 * \retval 0 if preparation succeeds.
738 * \retval negative errno if preparation fails.
740 static int prepare_multiple_node_trans(const struct lu_env *env,
741 struct top_multiple_thandle *tmt)
743 struct thandle_update_records *tur;
747 if (tmt->tmt_update_records == NULL) {
748 tur = &update_env_info(env)->uti_tur;
749 rc = check_and_prepare_update_record(env, tur);
753 tmt->tmt_update_records = tur;
754 distribute_txn_assign_batchid(tmt);
757 rc = declare_updates_write(env, tmt);
763 * start the top transaction.
765 * Start all of its sub transactions, then start master sub transaction.
767 * \param[in] env execution environment
768 * \param[in] master_dev master_dev the top thandle will be start
769 * \param[in] th top thandle
771 * \retval 0 if transaction start succeeds.
772 * \retval negative errno if start fails.
774 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
777 struct top_thandle *top_th = container_of(th, struct top_thandle,
779 struct sub_thandle *st;
780 struct top_multiple_thandle *tmt = top_th->tt_multiple_thandle;
786 top_th->tt_master_sub_thandle->th_sync = th->th_sync;
788 top_th->tt_master_sub_thandle->th_local = th->th_local;
789 rc = dt_trans_start(env, top_th->tt_master_sub_thandle->th_dev,
790 top_th->tt_master_sub_thandle);
794 tmt = top_th->tt_multiple_thandle;
795 rc = prepare_multiple_node_trans(env, tmt);
799 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
800 if (st->st_sub_th == NULL)
803 st->st_sub_th->th_sync = th->th_sync;
805 st->st_sub_th->th_local = th->th_local;
806 rc = dt_trans_start(env, st->st_sub_th->th_dev,
811 LASSERT(st->st_started == 0);
818 EXPORT_SYMBOL(top_trans_start);
821 * Check whether we need write updates record
823 * Check if the updates for the top_thandle needs to be writen
824 * to all targets. Only if the transaction succeeds and the updates
825 * number > 2, it will write the updates,
827 * \params [in] top_th top thandle.
829 * \retval true if it needs to write updates
830 * \retval false if it does not need to write updates
832 static bool top_check_write_updates(struct top_thandle *top_th)
834 struct top_multiple_thandle *tmt;
835 struct thandle_update_records *tur;
837 /* Do not write updates to records if the transaction fails */
838 if (top_th->tt_super.th_result != 0)
841 tmt = top_th->tt_multiple_thandle;
845 tur = tmt->tmt_update_records;
849 /* Hmm, false update records, since the cross-MDT operation
850 * should includes both local and remote updates, so the
851 * updates count should >= 2 */
852 if (tur->tur_update_records == NULL ||
853 tur->tur_update_records->lur_update_rec.ur_update_count <= 1)
860 * Check if top transaction is stopped
862 * Check if top transaction is stopped, only if all sub transaction
863 * is stopped, then the top transaction is stopped.
865 * \param [in] top_th top thandle
867 * \retval true if the top transaction is stopped.
868 * \retval false if the top transaction is not stopped.
870 static bool top_trans_is_stopped(struct top_thandle *top_th)
872 struct top_multiple_thandle *tmt;
873 struct sub_thandle *st;
874 bool all_stopped = true;
876 tmt = top_th->tt_multiple_thandle;
877 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
878 if (!st->st_stopped && st->st_sub_th != NULL) {
883 if (st->st_result != 0 &&
884 top_th->tt_super.th_result == 0)
885 top_th->tt_super.th_result = st->st_result;
892 * Wait result of top transaction
894 * Wait until all sub transaction get its result.
896 * \param [in] top_th top thandle.
898 * \retval the result of top thandle.
900 static int top_trans_wait_result(struct top_thandle *top_th)
902 wait_event_idle(top_th->tt_multiple_thandle->tmt_stop_waitq,
903 top_trans_is_stopped(top_th));
905 RETURN(top_th->tt_super.th_result);
909 * Stop the top transaction.
911 * Stop the transaction on the master device first, then stop transactions
912 * on other sub devices.
914 * \param[in] env execution environment
915 * \param[in] master_dev master_dev the top thandle will be created
916 * \param[in] th top thandle
918 * \retval 0 if stop transaction succeeds.
919 * \retval negative errno if stop transaction fails.
921 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
924 struct top_thandle *top_th = container_of(th, struct top_thandle,
926 struct sub_thandle *st;
927 struct sub_thandle *master_st;
928 struct top_multiple_thandle *tmt;
929 struct thandle_update_records *tur;
930 bool write_updates = false;
934 if (likely(top_th->tt_multiple_thandle == NULL)) {
935 LASSERT(master_dev != NULL);
938 top_th->tt_master_sub_thandle->th_sync = th->th_sync;
940 top_th->tt_master_sub_thandle->th_local = th->th_local;
941 rc = dt_trans_stop(env, master_dev,
942 top_th->tt_master_sub_thandle);
943 OBD_FREE_PTR(top_th);
947 tmt = top_th->tt_multiple_thandle;
948 tur = tmt->tmt_update_records;
950 /* Note: we need stop the master thandle first, then the stop
951 * callback will fill the master transno in the update logs,
952 * then these update logs will be sent to other MDTs */
953 /* get the master sub thandle */
954 master_st = lookup_sub_thandle(tmt, tmt->tmt_master_sub_dt);
955 write_updates = top_check_write_updates(top_th);
957 /* Step 1: write the updates log on Master MDT */
958 if (master_st != NULL && master_st->st_sub_th != NULL &&
960 struct llog_update_record *lur;
962 /* Merge the parameters and updates into one buffer */
963 rc = prepare_writing_updates(env, tmt);
965 CERROR("%s: cannot prepare updates: rc = %d\n",
966 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
968 write_updates = false;
969 GOTO(stop_master_trans, rc);
972 lur = tur->tur_update_records;
973 /* Write updates to the master MDT */
974 rc = sub_updates_write(env, lur, master_st);
976 /* Cleanup the common parameters in the update records,
977 * master transno callback might add more parameters.
978 * and we need merge the update records again in the
980 if (tur->tur_update_params != NULL)
981 lur->lur_update_rec.ur_param_count = 0;
984 CERROR("%s: write updates failed: rc = %d\n",
985 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
987 write_updates = false;
988 GOTO(stop_master_trans, rc);
993 /* Step 2: Stop the transaction on the master MDT, and fill the
994 * master transno in the update logs to other MDT. */
995 if (master_st != NULL && master_st->st_sub_th != NULL) {
997 master_st->st_sub_th->th_local = th->th_local;
999 master_st->st_sub_th->th_sync = th->th_sync;
1000 master_st->st_sub_th->th_result = th->th_result;
1001 rc = dt_trans_stop(env, master_st->st_dt, master_st->st_sub_th);
1002 /* If it does not write_updates, then we call submit callback
1003 * here, otherwise callback is done through
1004 * osd(osp)_trans_commit_cb() */
1005 if (!master_st->st_started &&
1006 !list_empty(&tmt->tmt_commit_list))
1007 sub_trans_commit_cb_internal(tmt,
1008 master_st->st_sub_th, rc);
1010 CERROR("%s: stop trans failed: rc = %d\n",
1011 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1013 GOTO(stop_other_trans, rc);
1014 } else if (tur != NULL && tur->tur_update_records != NULL) {
1015 struct llog_update_record *lur;
1017 lur = tur->tur_update_records;
1018 if (lur->lur_update_rec.ur_master_transno == 0)
1019 /* Update master transno after master stop
1021 lur->lur_update_rec.ur_master_transno =
1022 tgt_th_info(env)->tti_transno;
1026 /* Step 3: write updates to other MDTs */
1027 if (write_updates) {
1028 struct llog_update_record *lur;
1030 /* Stop callback of master will add more updates and also update
1031 * master transno, so merge the parameters and updates into one
1033 rc = prepare_writing_updates(env, tmt);
1035 CERROR("%s: prepare updates failed: rc = %d\n",
1036 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1038 GOTO(stop_other_trans, rc);
1040 lur = tur->tur_update_records;
1041 list_for_each_entry(st, &tmt->tmt_sub_thandle_list,
1043 if (st->st_sub_th == NULL || st == master_st ||
1044 st->st_sub_th->th_result < 0)
1047 rc = sub_updates_write(env, lur, st);
1049 CERROR("%s: write updates failed: rc = %d\n",
1050 st->st_dt->dd_lu_dev.ld_obd->obd_name,
1059 /* Step 4: Stop the transaction on other MDTs */
1060 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
1061 if (st == master_st || st->st_sub_th == NULL)
1065 st->st_sub_th->th_sync = th->th_sync;
1067 st->st_sub_th->th_local = th->th_local;
1068 st->st_sub_th->th_result = th->th_result;
1069 rc = dt_trans_stop(env, st->st_sub_th->th_dev,
1072 CERROR("%s: stop trans failed: rc = %d\n",
1073 st->st_dt->dd_lu_dev.ld_obd->obd_name, rc);
1074 if (th->th_result == 0)
1079 rc = top_trans_wait_result(top_th);
1081 tmt->tmt_result = rc;
1083 /* Balance for the refcount in top_trans_create, Note: if it is NOT
1084 * multiple node transaction, the top transaction will be destroyed. */
1085 top_multiple_thandle_put(tmt);
1086 OBD_FREE_PTR(top_th);
1089 EXPORT_SYMBOL(top_trans_stop);
1092 * Create top_multiple_thandle for top_thandle
1094 * Create top_mutilple_thandle to manage the mutiple node transaction
1095 * for top_thandle, and it also needs to add master sub thandle to the
1096 * sub trans list now.
1098 * \param[in] env execution environment
1099 * \param[in] top_th the top thandle
1101 * \retval 0 if creation succeeds
1102 * \retval negative errno if creation fails
1104 int top_trans_create_tmt(const struct lu_env *env,
1105 struct top_thandle *top_th)
1107 struct top_multiple_thandle *tmt;
1113 tmt->tmt_magic = TOP_THANDLE_MAGIC;
1114 INIT_LIST_HEAD(&tmt->tmt_sub_thandle_list);
1115 INIT_LIST_HEAD(&tmt->tmt_commit_list);
1116 atomic_set(&tmt->tmt_refcount, 1);
1117 spin_lock_init(&tmt->tmt_sub_lock);
1118 init_waitqueue_head(&tmt->tmt_stop_waitq);
1120 top_th->tt_multiple_thandle = tmt;
1125 static struct sub_thandle *
1126 create_sub_thandle_with_thandle(struct top_thandle *top_th,
1127 struct thandle *sub_th)
1129 struct sub_thandle *st;
1131 /* create and init sub th to the top trans list */
1132 st = create_sub_thandle(top_th->tt_multiple_thandle,
1137 st->st_sub_th = sub_th;
1139 sub_th->th_top = &top_th->tt_super;
1140 sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
1147 * Get sub thandle from the top thandle according to the sub dt_device.
1149 * \param[in] env execution environment
1150 * \param[in] th thandle on the top layer.
1151 * \param[in] sub_dt sub dt_device used to get sub transaction
1153 * \retval thandle of sub transaction if succeed
1154 * \retval PTR_ERR(errno) if failed
1156 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
1158 struct dt_device *sub_dt)
1160 struct sub_thandle *st = NULL;
1161 struct sub_thandle *master_st = NULL;
1162 struct top_thandle *top_th;
1163 struct thandle *sub_th = NULL;
1167 top_th = container_of(th, struct top_thandle, tt_super);
1169 if (likely(sub_dt == top_th->tt_master_sub_thandle->th_dev))
1170 RETURN(top_th->tt_master_sub_thandle);
1172 if (top_th->tt_multiple_thandle != NULL) {
1173 st = lookup_sub_thandle(top_th->tt_multiple_thandle, sub_dt);
1175 RETURN(st->st_sub_th);
1178 sub_th = dt_trans_create(env, sub_dt);
1182 /* Create top_multiple_thandle if necessary */
1183 if (top_th->tt_multiple_thandle == NULL) {
1184 struct top_multiple_thandle *tmt;
1186 rc = top_trans_create_tmt(env, top_th);
1188 GOTO(stop_trans, rc);
1190 tmt = top_th->tt_multiple_thandle;
1192 /* Add master sub th to the top trans list */
1193 tmt->tmt_master_sub_dt =
1194 top_th->tt_master_sub_thandle->th_dev;
1195 master_st = create_sub_thandle_with_thandle(top_th,
1196 top_th->tt_master_sub_thandle);
1197 if (IS_ERR(master_st)) {
1198 rc = PTR_ERR(master_st);
1200 GOTO(stop_trans, rc);
1204 /* create and init sub th to the top trans list */
1205 st = create_sub_thandle_with_thandle(top_th, sub_th);
1209 GOTO(stop_trans, rc);
1211 st->st_sub_th->th_wait_submit = 1;
1214 if (master_st != NULL) {
1215 list_del(&master_st->st_sub_list);
1216 OBD_FREE_PTR(master_st);
1218 sub_th->th_result = rc;
1219 dt_trans_stop(env, sub_dt, sub_th);
1220 sub_th = ERR_PTR(rc);
1225 EXPORT_SYMBOL(thandle_get_sub_by_dt);
1228 * Top multiple thandle destroy
1230 * Destroy multiple thandle and all its sub thandle.
1232 * \param[in] tmt top_multiple_thandle to be destroyed.
1234 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt)
1236 struct sub_thandle *st;
1237 struct sub_thandle *tmp;
1239 LASSERT(tmt->tmt_magic == TOP_THANDLE_MAGIC);
1240 list_for_each_entry_safe(st, tmp, &tmt->tmt_sub_thandle_list,
1242 struct sub_thandle_cookie *stc;
1243 struct sub_thandle_cookie *tmp;
1245 list_del(&st->st_sub_list);
1246 list_for_each_entry_safe(stc, tmp, &st->st_cookie_list,
1248 list_del(&stc->stc_list);
1255 EXPORT_SYMBOL(top_multiple_thandle_destroy);
1258 * Cancel the update log on MDTs
1260 * Cancel the update log on MDTs then destroy the thandle.
1262 * \param[in] env execution environment
1263 * \param[in] tmt the top multiple thandle whose updates records
1264 * will be cancelled.
1266 * \retval 0 if cancellation succeeds.
1267 * \retval negative errno if cancellation fails.
1269 static int distribute_txn_cancel_records(const struct lu_env *env,
1270 struct top_multiple_thandle *tmt)
1272 struct sub_thandle *st;
1275 top_multiple_thandle_dump(tmt, D_INFO);
1276 /* Cancel update logs on other MDTs */
1277 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
1278 struct llog_ctxt *ctxt;
1279 struct obd_device *obd;
1280 struct llog_cookie *cookie;
1281 struct sub_thandle_cookie *stc;
1284 obd = st->st_dt->dd_lu_dev.ld_obd;
1285 ctxt = llog_get_context(obd, LLOG_UPDATELOG_ORIG_CTXT);
1288 list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
1289 cookie = &stc->stc_cookie;
1290 if (fid_is_zero(&cookie->lgc_lgl.lgl_oi.oi_fid))
1293 rc = llog_cat_cancel_records(env, ctxt->loc_handle, 1,
1295 CDEBUG(D_HA, "%s: batchid %llu cancel update log "
1296 DFID".%u: rc = %d\n", obd->obd_name,
1298 PFID(&cookie->lgc_lgl.lgl_oi.oi_fid),
1299 cookie->lgc_index, rc);
1302 llog_ctxt_put(ctxt);
1308 struct distribute_txn_bid_data {
1309 struct dt_txn_commit_cb dtbd_cb;
1310 struct target_distribute_txn_data *dtbd_tdtd;
1315 * callback of updating commit batchid
1317 * Updating commit batchid then wake up the commit thread to cancel the
1320 * \param[in]env execution environment
1321 * \param[in]th thandle to updating commit batchid
1322 * \param[in]cb commit callback
1323 * \param[in]err result of thandle
1325 static void distribute_txn_batchid_cb(struct lu_env *env,
1327 struct dt_txn_commit_cb *cb,
1330 struct distribute_txn_bid_data *dtbd = NULL;
1331 struct target_distribute_txn_data *tdtd;
1333 dtbd = container_of(cb, struct distribute_txn_bid_data, dtbd_cb);
1334 tdtd = dtbd->dtbd_tdtd;
1336 CDEBUG(D_HA, "%s: %llu batchid updated\n",
1337 tdtd->tdtd_lut->lut_obd->obd_name, dtbd->dtbd_batchid);
1338 spin_lock(&tdtd->tdtd_batchid_lock);
1339 if (dtbd->dtbd_batchid > tdtd->tdtd_committed_batchid &&
1340 !tdtd->tdtd_lut->lut_obd->obd_no_transno)
1341 tdtd->tdtd_committed_batchid = dtbd->dtbd_batchid;
1342 spin_unlock(&tdtd->tdtd_batchid_lock);
1343 if (atomic_dec_and_test(&tdtd->tdtd_refcount))
1344 wake_up_process(tdtd->tdtd_commit_task);
1350 * Update the commit batchid in disk
1352 * Update commit batchid in the disk, after this is committed, it can start
1353 * to cancel the update records.
1355 * \param[in] env execution environment
1356 * \param[in] tdtd distribute transaction structure
1357 * \param[in] batchid commit batchid to be updated
1359 * \retval 0 if update succeeds.
1360 * \retval negative errno if update fails.
1363 distribute_txn_commit_batchid_update(const struct lu_env *env,
1364 struct target_distribute_txn_data *tdtd,
1367 struct distribute_txn_bid_data *dtbd = NULL;
1375 OBD_ALLOC_PTR(dtbd);
1378 dtbd->dtbd_batchid = batchid;
1379 dtbd->dtbd_tdtd = tdtd;
1380 dtbd->dtbd_cb.dcb_func = distribute_txn_batchid_cb;
1381 atomic_inc(&tdtd->tdtd_refcount);
1383 th = dt_trans_create(env, tdtd->tdtd_lut->lut_bottom);
1385 atomic_dec(&tdtd->tdtd_refcount);
1387 RETURN(PTR_ERR(th));
1390 tmp = cpu_to_le64(batchid);
1392 buf.lb_len = sizeof(tmp);
1395 rc = dt_declare_record_write(env, tdtd->tdtd_batchid_obj, &buf, off,
1400 rc = dt_trans_start_local(env, tdtd->tdtd_lut->lut_bottom, th);
1404 rc = dt_trans_cb_add(th, &dtbd->dtbd_cb);
1408 rc = dt_record_write(env, tdtd->tdtd_batchid_obj, &buf,
1411 CDEBUG(D_INFO, "%s: update batchid %llu: rc = %d\n",
1412 tdtd->tdtd_lut->lut_obd->obd_name, batchid, rc);
1415 dt_trans_stop(env, tdtd->tdtd_lut->lut_bottom, th);
1417 atomic_dec(&tdtd->tdtd_refcount);
1424 * Init commit batchid for distribute transaction.
1426 * Initialize the batchid object and get commit batchid from the object.
1428 * \param[in] env execution environment
1429 * \param[in] tdtd distribute transaction whose batchid is initialized.
1431 * \retval 0 if initialization succeeds.
1432 * \retval negative errno if initialization fails.
1435 distribute_txn_commit_batchid_init(const struct lu_env *env,
1436 struct target_distribute_txn_data *tdtd)
1438 struct tgt_thread_info *tti = tgt_th_info(env);
1439 struct lu_target *lut = tdtd->tdtd_lut;
1440 struct lu_attr *attr = &tti->tti_attr;
1441 struct lu_fid *fid = &tti->tti_fid1;
1442 struct dt_object_format *dof = &tti->tti_u.update.tti_update_dof;
1443 struct dt_object *dt_obj = NULL;
1450 memset(attr, 0, sizeof(*attr));
1451 attr->la_valid = LA_MODE;
1452 attr->la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1453 dof->dof_type = dt_mode_to_dft(S_IFREG);
1455 lu_local_obj_fid(fid, BATCHID_COMMITTED_OID);
1457 dt_obj = dt_find_or_create(env, lut->lut_bottom, fid, dof,
1459 if (IS_ERR(dt_obj)) {
1460 rc = PTR_ERR(dt_obj);
1465 tdtd->tdtd_batchid_obj = dt_obj;
1468 buf.lb_len = sizeof(tmp);
1470 rc = dt_read(env, dt_obj, &buf, &off);
1471 if (rc < 0 || (rc < buf.lb_len && rc > 0)) {
1472 CERROR("%s can't read last committed batchid: rc = %d\n",
1473 tdtd->tdtd_lut->lut_obd->obd_name, rc);
1477 } else if (rc == buf.lb_len) {
1478 tdtd->tdtd_committed_batchid = le64_to_cpu(tmp);
1479 CDEBUG(D_HA, "%s: committed batchid %llu\n",
1480 tdtd->tdtd_lut->lut_obd->obd_name,
1481 tdtd->tdtd_committed_batchid);
1486 if (rc < 0 && dt_obj != NULL) {
1487 dt_object_put(env, dt_obj);
1488 tdtd->tdtd_batchid_obj = NULL;
1494 #define TASK_IDLE TASK_INTERRUPTIBLE
1498 * manage the distribute transaction thread
1500 * Distribute transaction are linked to the list, and once the distribute
1501 * transaction is committed, it will update the last committed batchid first,
1502 * after it is committed, it will cancel the records.
1504 * \param[in] _arg argument for commit thread
1506 * \retval 0 if thread is running successfully
1507 * \retval negative errno if the thread can not be run.
1509 static int distribute_txn_commit_thread(void *_arg)
1511 struct target_distribute_txn_data *tdtd = _arg;
1512 struct lu_env *env = &tdtd->tdtd_env;
1515 struct top_multiple_thandle *tmt;
1516 struct top_multiple_thandle *tmp;
1517 __u64 batchid = 0, committed;
1522 CDEBUG(D_HA, "%s: start commit thread committed batchid %llu\n",
1523 tdtd->tdtd_lut->lut_obd->obd_name,
1524 tdtd->tdtd_committed_batchid);
1526 while (({set_current_state(TASK_IDLE);
1527 !kthread_should_stop(); })) {
1528 spin_lock(&tdtd->tdtd_batchid_lock);
1529 list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
1531 if (tmt->tmt_committed == 0)
1534 /* Note: right now, replay is based on master MDT
1535 * transno, but cancellation is based on batchid.
1536 * so we do not try to cancel the update log until
1537 * the recoverying is done, unless the update records
1538 * batchid < committed_batchid. */
1539 if (tmt->tmt_batchid <= tdtd->tdtd_committed_batchid) {
1540 __set_current_state(TASK_RUNNING);
1541 list_move_tail(&tmt->tmt_commit_list, &list);
1542 } else if (!tdtd->tdtd_lut->lut_obd->obd_recovering) {
1543 __set_current_state(TASK_RUNNING);
1544 LASSERTF(tmt->tmt_batchid >= batchid,
1545 "tmt %p tmt_batchid: %llu, batchid "
1546 "%llu\n", tmt, tmt->tmt_batchid,
1548 /* There are three types of distribution
1549 * transaction result
1551 * 1. If tmt_result < 0, it means the
1552 * distribution transaction fails, which should
1553 * be rare, because once declare phase succeeds,
1554 * the operation should succeeds anyway. Note in
1555 * this case, we will still update batchid so
1556 * cancellation would be stopped.
1558 * 2. If tmt_result == 0, it means the
1559 * distribution transaction succeeds, and we
1560 * will update batchid.
1562 * 3. If tmt_result > 0, it means distribute
1563 * transaction is not yet committed on every
1564 * node, but we need release this tmt before
1565 * that, which usuually happens during umount.
1567 if (tmt->tmt_result <= 0)
1568 batchid = tmt->tmt_batchid;
1569 list_move_tail(&tmt->tmt_commit_list, &list);
1572 spin_unlock(&tdtd->tdtd_batchid_lock);
1574 CDEBUG(D_HA, "%s: batchid: %llu committed batchid "
1575 "%llu\n", tdtd->tdtd_lut->lut_obd->obd_name, batchid,
1576 tdtd->tdtd_committed_batchid);
1577 /* update globally committed on a storage */
1578 if (batchid > tdtd->tdtd_committed_batchid) {
1579 __set_current_state(TASK_RUNNING);
1580 rc = distribute_txn_commit_batchid_update(env, tdtd,
1585 /* cancel the records for committed batchid's */
1586 /* XXX: should we postpone cancel's till the end of recovery? */
1587 committed = tdtd->tdtd_committed_batchid;
1588 list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
1589 if (tmt->tmt_batchid > committed)
1591 __set_current_state(TASK_RUNNING);
1592 list_del_init(&tmt->tmt_commit_list);
1593 if (tmt->tmt_result <= 0)
1594 distribute_txn_cancel_records(env, tmt);
1595 top_multiple_thandle_put(tmt);
1602 while (({set_current_state(TASK_IDLE);
1603 atomic_read(&tdtd->tdtd_refcount) != 0; }))
1605 __set_current_state(TASK_RUNNING);
1607 spin_lock(&tdtd->tdtd_batchid_lock);
1608 list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
1610 list_move_tail(&tmt->tmt_commit_list, &list);
1611 spin_unlock(&tdtd->tdtd_batchid_lock);
1613 CDEBUG(D_INFO, "%s stopping distribute txn commit thread.\n",
1614 tdtd->tdtd_lut->lut_obd->obd_name);
1615 list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
1616 list_del_init(&tmt->tmt_commit_list);
1617 top_multiple_thandle_dump(tmt, D_HA);
1618 top_multiple_thandle_put(tmt);
1624 * Start llog cancel thread
1626 * Start llog cancel(master/slave) thread on LOD
1628 * \param[in]lclt cancel log thread to be started.
1630 * \retval 0 if the thread is started successfully.
1631 * \retval negative errno if the thread is not being
1634 int distribute_txn_init(const struct lu_env *env,
1635 struct lu_target *lut,
1636 struct target_distribute_txn_data *tdtd,
1639 struct task_struct *task;
1643 INIT_LIST_HEAD(&tdtd->tdtd_list);
1644 INIT_LIST_HEAD(&tdtd->tdtd_replay_finish_list);
1645 INIT_LIST_HEAD(&tdtd->tdtd_replay_list);
1646 spin_lock_init(&tdtd->tdtd_batchid_lock);
1647 spin_lock_init(&tdtd->tdtd_replay_list_lock);
1648 tdtd->tdtd_replay_handler = distribute_txn_replay_handle;
1649 tdtd->tdtd_replay_ready = 0;
1651 tdtd->tdtd_batchid = lut->lut_last_transno + 1;
1653 init_waitqueue_head(&tdtd->tdtd_recovery_threads_waitq);
1654 atomic_set(&tdtd->tdtd_refcount, 0);
1655 atomic_set(&tdtd->tdtd_recovery_threads_count, 0);
1657 tdtd->tdtd_lut = lut;
1658 if (lut->lut_bottom->dd_rdonly)
1661 rc = distribute_txn_commit_batchid_init(env, tdtd);
1665 rc = lu_env_init(&tdtd->tdtd_env, LCT_LOCAL | LCT_MD_THREAD);
1669 task = kthread_create(distribute_txn_commit_thread, tdtd, "dist_txn-%u",
1672 lu_env_fini(&tdtd->tdtd_env);
1673 RETURN(PTR_ERR(task));
1675 tdtd->tdtd_commit_task = task;
1676 wake_up_process(task);
1680 EXPORT_SYMBOL(distribute_txn_init);
1683 * Stop llog cancel thread
1685 * Stop llog cancel(master/slave) thread on LOD and also destory
1686 * all of transaction in the list.
1688 * \param[in]lclt cancel log thread to be stopped.
1690 void distribute_txn_fini(const struct lu_env *env,
1691 struct target_distribute_txn_data *tdtd)
1693 struct top_multiple_thandle *tmt;
1696 /* Stop cancel thread */
1697 if (!tdtd->tdtd_commit_task)
1700 kthread_stop(tdtd->tdtd_commit_task);
1701 tdtd->tdtd_commit_task = NULL;
1703 spin_lock(&tdtd->tdtd_batchid_lock);
1704 list_splice_init(&tdtd->tdtd_list, &list);
1705 spin_unlock(&tdtd->tdtd_batchid_lock);
1707 CDEBUG(D_INFO, "%s stopping distribute txn commit thread.\n",
1708 tdtd->tdtd_lut->lut_obd->obd_name);
1709 while ((tmt = list_first_entry_or_null(&list,
1710 struct top_multiple_thandle,
1711 tmt_commit_list)) != NULL) {
1712 list_del_init(&tmt->tmt_commit_list);
1713 top_multiple_thandle_dump(tmt, D_HA);
1714 top_multiple_thandle_put(tmt);
1717 lu_env_fini(&tdtd->tdtd_env);
1719 dtrq_list_destroy(tdtd);
1720 if (tdtd->tdtd_batchid_obj != NULL) {
1721 dt_object_put(env, tdtd->tdtd_batchid_obj);
1722 tdtd->tdtd_batchid_obj = NULL;
1725 EXPORT_SYMBOL(distribute_txn_fini);