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 distribute_txn_commit_thread_running(struct lu_target *lut)
393 return lut->lut_tdtd_commit_thread.t_flags & SVC_RUNNING;
397 distribute_txn_commit_thread_stopped(struct lu_target *lut)
399 return lut->lut_tdtd_commit_thread.t_flags & SVC_STOPPED;
403 * Top thandle commit callback
405 * This callback will be called when all of sub transactions are committed.
407 * \param[in] th top thandle to be committed.
409 static void top_trans_committed_cb(struct top_multiple_thandle *tmt)
411 struct lu_target *lut;
414 LASSERT(atomic_read(&tmt->tmt_refcount) > 0);
416 top_multiple_thandle_dump(tmt, D_HA);
417 tmt->tmt_committed = 1;
418 lut = dt2lu_dev(tmt->tmt_master_sub_dt)->ld_site->ls_tgt;
419 if (distribute_txn_commit_thread_running(lut))
420 wake_up(&lut->lut_tdtd->tdtd_commit_thread_waitq);
424 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
425 struct dt_device *dt_dev)
427 struct sub_thandle *st;
429 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
430 if (st->st_dt == dt_dev)
435 EXPORT_SYMBOL(lookup_sub_thandle);
437 struct sub_thandle *create_sub_thandle(struct top_multiple_thandle *tmt,
438 struct dt_device *dt_dev)
440 struct sub_thandle *st;
444 RETURN(ERR_PTR(-ENOMEM));
446 INIT_LIST_HEAD(&st->st_sub_list);
447 INIT_LIST_HEAD(&st->st_cookie_list);
450 list_add(&st->st_sub_list, &tmt->tmt_sub_thandle_list);
454 static void sub_trans_commit_cb_internal(struct top_multiple_thandle *tmt,
455 struct thandle *sub_th, int err)
457 struct sub_thandle *st;
458 bool all_committed = true;
460 /* Check if all sub thandles are committed */
461 spin_lock(&tmt->tmt_sub_lock);
462 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
463 if (st->st_sub_th == sub_th) {
464 st->st_committed = 1;
467 if (!st->st_committed)
468 all_committed = false;
470 spin_unlock(&tmt->tmt_sub_lock);
472 if (tmt->tmt_result == 0)
473 tmt->tmt_result = err;
476 top_trans_committed_cb(tmt);
478 top_multiple_thandle_dump(tmt, D_INFO);
479 top_multiple_thandle_put(tmt);
484 * sub thandle commit callback
486 * Mark the sub thandle to be committed and if all sub thandle are committed
487 * notify the top thandle.
489 * \param[in] env execution environment
490 * \param[in] sub_th sub thandle being committed
491 * \param[in] cb commit callback
492 * \param[in] err trans result
494 static void sub_trans_commit_cb(struct lu_env *env,
495 struct thandle *sub_th,
496 struct dt_txn_commit_cb *cb, int err)
498 struct top_multiple_thandle *tmt = cb->dcb_data;
500 sub_trans_commit_cb_internal(tmt, sub_th, err);
503 static void sub_thandle_register_commit_cb(struct sub_thandle *st,
504 struct top_multiple_thandle *tmt)
506 LASSERT(st->st_sub_th != NULL);
507 top_multiple_thandle_get(tmt);
508 st->st_commit_dcb.dcb_func = sub_trans_commit_cb;
509 st->st_commit_dcb.dcb_data = tmt;
510 INIT_LIST_HEAD(&st->st_commit_dcb.dcb_linkage);
511 dt_trans_cb_add(st->st_sub_th, &st->st_commit_dcb);
515 * Sub thandle stop call back
517 * After sub thandle is stopped, it will call this callback to notify
520 * \param[in] th sub thandle to be stopped
521 * \param[in] rc result of sub trans
523 static void sub_trans_stop_cb(struct lu_env *env,
524 struct thandle *sub_th,
525 struct dt_txn_commit_cb *cb, int err)
527 struct sub_thandle *st;
528 struct top_multiple_thandle *tmt = cb->dcb_data;
531 spin_lock(&tmt->tmt_sub_lock);
532 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
536 if (st->st_dt == sub_th->th_dev) {
542 spin_unlock(&tmt->tmt_sub_lock);
544 wake_up(&tmt->tmt_stop_waitq);
548 static void sub_thandle_register_stop_cb(struct sub_thandle *st,
549 struct top_multiple_thandle *tmt)
551 st->st_stop_dcb.dcb_func = sub_trans_stop_cb;
552 st->st_stop_dcb.dcb_data = tmt;
553 st->st_stop_dcb.dcb_flags = DCB_TRANS_STOP;
554 INIT_LIST_HEAD(&st->st_stop_dcb.dcb_linkage);
555 dt_trans_cb_add(st->st_sub_th, &st->st_stop_dcb);
561 * Create transaction handle for sub_thandle
563 * \param[in] env execution environment
564 * \param[in] th top thandle
565 * \param[in] st sub_thandle
567 * \retval 0 if creation succeeds.
568 * \retval negative errno if creation fails.
570 int sub_thandle_trans_create(const struct lu_env *env,
571 struct top_thandle *top_th,
572 struct sub_thandle *st)
574 struct thandle *sub_th;
576 sub_th = dt_trans_create(env, st->st_dt);
578 return PTR_ERR(sub_th);
580 sub_th->th_top = &top_th->tt_super;
581 st->st_sub_th = sub_th;
583 sub_th->th_wait_submit = 1;
584 sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
589 * Create the top transaction.
591 * Create the top transaction on the master device. It will create a top
592 * thandle and a sub thandle on the master device.
594 * \param[in] env execution environment
595 * \param[in] master_dev master_dev the top thandle will be created
597 * \retval pointer to the created thandle.
598 * \retval ERR_PTR(errno) if creation failed.
601 top_trans_create(const struct lu_env *env, struct dt_device *master_dev)
603 struct top_thandle *top_th;
604 struct thandle *child_th;
606 OBD_ALLOC_GFP(top_th, sizeof(*top_th), __GFP_IO);
608 return ERR_PTR(-ENOMEM);
610 top_th->tt_super.th_top = &top_th->tt_super;
612 if (master_dev != NULL) {
613 child_th = dt_trans_create(env, master_dev);
614 if (IS_ERR(child_th)) {
615 OBD_FREE_PTR(top_th);
619 child_th->th_top = &top_th->tt_super;
620 child_th->th_wait_submit = 1;
621 top_th->tt_master_sub_thandle = child_th;
623 return &top_th->tt_super;
625 EXPORT_SYMBOL(top_trans_create);
628 * Declare write update transaction
630 * Check if there are updates being recorded in this transaction,
631 * it will write the record into the disk.
633 * \param[in] env execution environment
634 * \param[in] tmt top multiple transaction handle
636 * \retval 0 if writing succeeds
637 * \retval negative errno if writing fails
639 static int declare_updates_write(const struct lu_env *env,
640 struct top_multiple_thandle *tmt)
642 struct llog_update_record *record;
643 struct sub_thandle *st;
646 record = tmt->tmt_update_records->tur_update_records;
647 /* Declare update write for all other target */
648 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
649 if (st->st_sub_th == NULL)
652 rc = sub_declare_updates_write(env, record, st->st_sub_th,
653 tmt->tmt_record_size);
662 * Assign batchid to the distribute transaction.
664 * Assign batchid to the distribute transaction
666 * \param[in] tmt distribute transaction
668 static void distribute_txn_assign_batchid(struct top_multiple_thandle *new)
670 struct target_distribute_txn_data *tdtd;
671 struct dt_device *dt = new->tmt_master_sub_dt;
672 struct sub_thandle *st;
675 tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
676 spin_lock(&tdtd->tdtd_batchid_lock);
677 new->tmt_batchid = tdtd->tdtd_batchid++;
678 list_add_tail(&new->tmt_commit_list, &tdtd->tdtd_list);
679 spin_unlock(&tdtd->tdtd_batchid_lock);
680 list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
681 if (st->st_sub_th != NULL)
682 sub_thandle_register_commit_cb(st, new);
684 top_multiple_thandle_get(new);
685 top_multiple_thandle_dump(new, D_INFO);
689 * Insert distribute transaction to the distribute txn list.
691 * Insert distribute transaction to the distribute txn list.
693 * \param[in] new the distribute txn to be inserted.
695 void distribute_txn_insert_by_batchid(struct top_multiple_thandle *new)
697 struct dt_device *dt = new->tmt_master_sub_dt;
698 struct top_multiple_thandle *tmt;
699 struct target_distribute_txn_data *tdtd;
700 struct sub_thandle *st;
701 bool at_head = false;
704 tdtd = dt2lu_dev(dt)->ld_site->ls_tgt->lut_tdtd;
706 spin_lock(&tdtd->tdtd_batchid_lock);
707 list_for_each_entry_reverse(tmt, &tdtd->tdtd_list, tmt_commit_list) {
708 if (new->tmt_batchid > tmt->tmt_batchid) {
709 list_add(&new->tmt_commit_list, &tmt->tmt_commit_list);
713 if (list_empty(&new->tmt_commit_list)) {
715 list_add(&new->tmt_commit_list, &tdtd->tdtd_list);
717 spin_unlock(&tdtd->tdtd_batchid_lock);
719 list_for_each_entry(st, &new->tmt_sub_thandle_list, st_sub_list) {
720 if (st->st_sub_th != NULL)
721 sub_thandle_register_commit_cb(st, new);
724 top_multiple_thandle_get(new);
725 top_multiple_thandle_dump(new, D_INFO);
726 if (new->tmt_committed && at_head)
727 wake_up(&tdtd->tdtd_commit_thread_waitq);
731 * Prepare cross-MDT operation.
733 * Create the update record buffer to record updates for cross-MDT operation,
734 * add master sub transaction to tt_sub_trans_list, and declare the update
737 * During updates packing, all of parameters will be packed in
738 * tur_update_params, and updates will be packed in tur_update_records.
739 * Then in transaction stop, parameters and updates will be merged
740 * into one updates buffer.
742 * And also master thandle will be added to the sub_th list, so it will be
743 * easy to track the commit status.
745 * \param[in] env execution environment
746 * \param[in] th top transaction handle
748 * \retval 0 if preparation succeeds.
749 * \retval negative errno if preparation fails.
751 static int prepare_multiple_node_trans(const struct lu_env *env,
752 struct top_multiple_thandle *tmt)
754 struct thandle_update_records *tur;
758 if (tmt->tmt_update_records == NULL) {
759 tur = &update_env_info(env)->uti_tur;
760 rc = check_and_prepare_update_record(env, tur);
764 tmt->tmt_update_records = tur;
765 distribute_txn_assign_batchid(tmt);
768 rc = declare_updates_write(env, tmt);
774 * start the top transaction.
776 * Start all of its sub transactions, then start master sub transaction.
778 * \param[in] env execution environment
779 * \param[in] master_dev master_dev the top thandle will be start
780 * \param[in] th top thandle
782 * \retval 0 if transaction start succeeds.
783 * \retval negative errno if start fails.
785 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
788 struct top_thandle *top_th = container_of(th, struct top_thandle,
790 struct sub_thandle *st;
791 struct top_multiple_thandle *tmt = top_th->tt_multiple_thandle;
797 top_th->tt_master_sub_thandle->th_sync = th->th_sync;
799 top_th->tt_master_sub_thandle->th_local = th->th_local;
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 rc = dt_trans_start(env, st->st_sub_th->th_dev,
822 LASSERT(st->st_started == 0);
829 EXPORT_SYMBOL(top_trans_start);
832 * Check whether we need write updates record
834 * Check if the updates for the top_thandle needs to be writen
835 * to all targets. Only if the transaction succeeds and the updates
836 * number > 2, it will write the updates,
838 * \params [in] top_th top thandle.
840 * \retval true if it needs to write updates
841 * \retval false if it does not need to write updates
843 static bool top_check_write_updates(struct top_thandle *top_th)
845 struct top_multiple_thandle *tmt;
846 struct thandle_update_records *tur;
848 /* Do not write updates to records if the transaction fails */
849 if (top_th->tt_super.th_result != 0)
852 tmt = top_th->tt_multiple_thandle;
856 tur = tmt->tmt_update_records;
860 /* Hmm, false update records, since the cross-MDT operation
861 * should includes both local and remote updates, so the
862 * updates count should >= 2 */
863 if (tur->tur_update_records == NULL ||
864 tur->tur_update_records->lur_update_rec.ur_update_count <= 1)
871 * Check if top transaction is stopped
873 * Check if top transaction is stopped, only if all sub transaction
874 * is stopped, then the top transaction is stopped.
876 * \param [in] top_th top thandle
878 * \retval true if the top transaction is stopped.
879 * \retval false if the top transaction is not stopped.
881 static bool top_trans_is_stopped(struct top_thandle *top_th)
883 struct top_multiple_thandle *tmt;
884 struct sub_thandle *st;
885 bool all_stopped = true;
887 tmt = top_th->tt_multiple_thandle;
888 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
889 if (!st->st_stopped && st->st_sub_th != NULL) {
894 if (st->st_result != 0 &&
895 top_th->tt_super.th_result == 0)
896 top_th->tt_super.th_result = st->st_result;
903 * Wait result of top transaction
905 * Wait until all sub transaction get its result.
907 * \param [in] top_th top thandle.
909 * \retval the result of top thandle.
911 static int top_trans_wait_result(struct top_thandle *top_th)
913 struct l_wait_info lwi = {0};
915 l_wait_event(top_th->tt_multiple_thandle->tmt_stop_waitq,
916 top_trans_is_stopped(top_th), &lwi);
918 RETURN(top_th->tt_super.th_result);
922 * Stop the top transaction.
924 * Stop the transaction on the master device first, then stop transactions
925 * on other sub devices.
927 * \param[in] env execution environment
928 * \param[in] master_dev master_dev the top thandle will be created
929 * \param[in] th top thandle
931 * \retval 0 if stop transaction succeeds.
932 * \retval negative errno if stop transaction fails.
934 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
937 struct top_thandle *top_th = container_of(th, struct top_thandle,
939 struct sub_thandle *st;
940 struct sub_thandle *master_st;
941 struct top_multiple_thandle *tmt;
942 struct thandle_update_records *tur;
943 bool write_updates = false;
947 if (likely(top_th->tt_multiple_thandle == NULL)) {
948 LASSERT(master_dev != NULL);
951 top_th->tt_master_sub_thandle->th_sync = th->th_sync;
953 top_th->tt_master_sub_thandle->th_local = th->th_local;
954 rc = dt_trans_stop(env, master_dev,
955 top_th->tt_master_sub_thandle);
956 OBD_FREE_PTR(top_th);
960 tmt = top_th->tt_multiple_thandle;
961 tur = tmt->tmt_update_records;
963 /* Note: we need stop the master thandle first, then the stop
964 * callback will fill the master transno in the update logs,
965 * then these update logs will be sent to other MDTs */
966 /* get the master sub thandle */
967 master_st = lookup_sub_thandle(tmt, tmt->tmt_master_sub_dt);
968 write_updates = top_check_write_updates(top_th);
970 /* Step 1: write the updates log on Master MDT */
971 if (master_st != NULL && master_st->st_sub_th != NULL &&
973 struct llog_update_record *lur;
975 /* Merge the parameters and updates into one buffer */
976 rc = prepare_writing_updates(env, tmt);
978 CERROR("%s: cannot prepare updates: rc = %d\n",
979 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
981 write_updates = false;
982 GOTO(stop_master_trans, rc);
985 lur = tur->tur_update_records;
986 /* Write updates to the master MDT */
987 rc = sub_updates_write(env, lur, master_st);
989 /* Cleanup the common parameters in the update records,
990 * master transno callback might add more parameters.
991 * and we need merge the update records again in the
993 if (tur->tur_update_params != NULL)
994 lur->lur_update_rec.ur_param_count = 0;
997 CERROR("%s: write updates failed: rc = %d\n",
998 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1000 write_updates = false;
1001 GOTO(stop_master_trans, rc);
1006 /* Step 2: Stop the transaction on the master MDT, and fill the
1007 * master transno in the update logs to other MDT. */
1008 if (master_st != NULL && master_st->st_sub_th != NULL) {
1010 master_st->st_sub_th->th_local = th->th_local;
1012 master_st->st_sub_th->th_sync = th->th_sync;
1013 master_st->st_sub_th->th_result = th->th_result;
1014 rc = dt_trans_stop(env, master_st->st_dt, master_st->st_sub_th);
1015 /* If it does not write_updates, then we call submit callback
1016 * here, otherwise callback is done through
1017 * osd(osp)_trans_commit_cb() */
1018 if (!master_st->st_started &&
1019 !list_empty(&tmt->tmt_commit_list))
1020 sub_trans_commit_cb_internal(tmt,
1021 master_st->st_sub_th, rc);
1023 CERROR("%s: stop trans failed: rc = %d\n",
1024 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1026 GOTO(stop_other_trans, rc);
1027 } else if (tur != NULL && tur->tur_update_records != NULL) {
1028 struct llog_update_record *lur;
1030 lur = tur->tur_update_records;
1031 if (lur->lur_update_rec.ur_master_transno == 0)
1032 /* Update master transno after master stop
1034 lur->lur_update_rec.ur_master_transno =
1035 tgt_th_info(env)->tti_transno;
1039 /* Step 3: write updates to other MDTs */
1040 if (write_updates) {
1041 struct llog_update_record *lur;
1043 /* Stop callback of master will add more updates and also update
1044 * master transno, so merge the parameters and updates into one
1046 rc = prepare_writing_updates(env, tmt);
1048 CERROR("%s: prepare updates failed: rc = %d\n",
1049 master_dev->dd_lu_dev.ld_obd->obd_name, rc);
1051 GOTO(stop_other_trans, rc);
1053 lur = tur->tur_update_records;
1054 list_for_each_entry(st, &tmt->tmt_sub_thandle_list,
1056 if (st->st_sub_th == NULL || st == master_st ||
1057 st->st_sub_th->th_result < 0)
1060 rc = sub_updates_write(env, lur, st);
1062 CERROR("%s: write updates failed: rc = %d\n",
1063 st->st_dt->dd_lu_dev.ld_obd->obd_name,
1072 /* Step 4: Stop the transaction on other MDTs */
1073 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
1074 if (st == master_st || st->st_sub_th == NULL)
1078 st->st_sub_th->th_sync = th->th_sync;
1080 st->st_sub_th->th_local = th->th_local;
1081 st->st_sub_th->th_result = th->th_result;
1082 rc = dt_trans_stop(env, st->st_sub_th->th_dev,
1085 CERROR("%s: stop trans failed: rc = %d\n",
1086 st->st_dt->dd_lu_dev.ld_obd->obd_name, rc);
1087 if (th->th_result == 0)
1092 rc = top_trans_wait_result(top_th);
1094 tmt->tmt_result = rc;
1096 /* Balance for the refcount in top_trans_create, Note: if it is NOT
1097 * multiple node transaction, the top transaction will be destroyed. */
1098 top_multiple_thandle_put(tmt);
1099 OBD_FREE_PTR(top_th);
1102 EXPORT_SYMBOL(top_trans_stop);
1105 * Create top_multiple_thandle for top_thandle
1107 * Create top_mutilple_thandle to manage the mutiple node transaction
1108 * for top_thandle, and it also needs to add master sub thandle to the
1109 * sub trans list now.
1111 * \param[in] env execution environment
1112 * \param[in] top_th the top thandle
1114 * \retval 0 if creation succeeds
1115 * \retval negative errno if creation fails
1117 int top_trans_create_tmt(const struct lu_env *env,
1118 struct top_thandle *top_th)
1120 struct top_multiple_thandle *tmt;
1126 tmt->tmt_magic = TOP_THANDLE_MAGIC;
1127 INIT_LIST_HEAD(&tmt->tmt_sub_thandle_list);
1128 INIT_LIST_HEAD(&tmt->tmt_commit_list);
1129 atomic_set(&tmt->tmt_refcount, 1);
1130 spin_lock_init(&tmt->tmt_sub_lock);
1131 init_waitqueue_head(&tmt->tmt_stop_waitq);
1133 top_th->tt_multiple_thandle = tmt;
1138 static struct sub_thandle *
1139 create_sub_thandle_with_thandle(struct top_thandle *top_th,
1140 struct thandle *sub_th)
1142 struct sub_thandle *st;
1144 /* create and init sub th to the top trans list */
1145 st = create_sub_thandle(top_th->tt_multiple_thandle,
1150 st->st_sub_th = sub_th;
1152 sub_th->th_top = &top_th->tt_super;
1153 sub_thandle_register_stop_cb(st, top_th->tt_multiple_thandle);
1160 * Get sub thandle from the top thandle according to the sub dt_device.
1162 * \param[in] env execution environment
1163 * \param[in] th thandle on the top layer.
1164 * \param[in] sub_dt sub dt_device used to get sub transaction
1166 * \retval thandle of sub transaction if succeed
1167 * \retval PTR_ERR(errno) if failed
1169 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
1171 struct dt_device *sub_dt)
1173 struct sub_thandle *st = NULL;
1174 struct sub_thandle *master_st = NULL;
1175 struct top_thandle *top_th;
1176 struct thandle *sub_th = NULL;
1180 top_th = container_of(th, struct top_thandle, tt_super);
1182 if (likely(sub_dt == top_th->tt_master_sub_thandle->th_dev))
1183 RETURN(top_th->tt_master_sub_thandle);
1185 if (top_th->tt_multiple_thandle != NULL) {
1186 st = lookup_sub_thandle(top_th->tt_multiple_thandle, sub_dt);
1188 RETURN(st->st_sub_th);
1191 sub_th = dt_trans_create(env, sub_dt);
1195 /* Create top_multiple_thandle if necessary */
1196 if (top_th->tt_multiple_thandle == NULL) {
1197 struct top_multiple_thandle *tmt;
1199 rc = top_trans_create_tmt(env, top_th);
1201 GOTO(stop_trans, rc);
1203 tmt = top_th->tt_multiple_thandle;
1205 /* Add master sub th to the top trans list */
1206 tmt->tmt_master_sub_dt =
1207 top_th->tt_master_sub_thandle->th_dev;
1208 master_st = create_sub_thandle_with_thandle(top_th,
1209 top_th->tt_master_sub_thandle);
1210 if (IS_ERR(master_st)) {
1211 rc = PTR_ERR(master_st);
1213 GOTO(stop_trans, rc);
1217 /* create and init sub th to the top trans list */
1218 st = create_sub_thandle_with_thandle(top_th, sub_th);
1222 GOTO(stop_trans, rc);
1224 st->st_sub_th->th_wait_submit = 1;
1227 if (master_st != NULL) {
1228 list_del(&master_st->st_sub_list);
1229 OBD_FREE_PTR(master_st);
1231 sub_th->th_result = rc;
1232 dt_trans_stop(env, sub_dt, sub_th);
1233 sub_th = ERR_PTR(rc);
1238 EXPORT_SYMBOL(thandle_get_sub_by_dt);
1241 * Top multiple thandle destroy
1243 * Destroy multiple thandle and all its sub thandle.
1245 * \param[in] tmt top_multiple_thandle to be destroyed.
1247 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt)
1249 struct sub_thandle *st;
1250 struct sub_thandle *tmp;
1252 LASSERT(tmt->tmt_magic == TOP_THANDLE_MAGIC);
1253 list_for_each_entry_safe(st, tmp, &tmt->tmt_sub_thandle_list,
1255 struct sub_thandle_cookie *stc;
1256 struct sub_thandle_cookie *tmp;
1258 list_del(&st->st_sub_list);
1259 list_for_each_entry_safe(stc, tmp, &st->st_cookie_list,
1261 list_del(&stc->stc_list);
1268 EXPORT_SYMBOL(top_multiple_thandle_destroy);
1271 * Cancel the update log on MDTs
1273 * Cancel the update log on MDTs then destroy the thandle.
1275 * \param[in] env execution environment
1276 * \param[in] tmt the top multiple thandle whose updates records
1277 * will be cancelled.
1279 * \retval 0 if cancellation succeeds.
1280 * \retval negative errno if cancellation fails.
1282 static int distribute_txn_cancel_records(const struct lu_env *env,
1283 struct top_multiple_thandle *tmt)
1285 struct sub_thandle *st;
1288 top_multiple_thandle_dump(tmt, D_INFO);
1289 /* Cancel update logs on other MDTs */
1290 list_for_each_entry(st, &tmt->tmt_sub_thandle_list, st_sub_list) {
1291 struct llog_ctxt *ctxt;
1292 struct obd_device *obd;
1293 struct llog_cookie *cookie;
1294 struct sub_thandle_cookie *stc;
1297 obd = st->st_dt->dd_lu_dev.ld_obd;
1298 ctxt = llog_get_context(obd, LLOG_UPDATELOG_ORIG_CTXT);
1301 list_for_each_entry(stc, &st->st_cookie_list, stc_list) {
1302 cookie = &stc->stc_cookie;
1303 if (fid_is_zero(&cookie->lgc_lgl.lgl_oi.oi_fid))
1306 rc = llog_cat_cancel_records(env, ctxt->loc_handle, 1,
1308 CDEBUG(D_HA, "%s: batchid %llu cancel update log "
1309 DFID".%u: rc = %d\n", obd->obd_name,
1311 PFID(&cookie->lgc_lgl.lgl_oi.oi_fid),
1312 cookie->lgc_index, rc);
1315 llog_ctxt_put(ctxt);
1322 * Check if there are committed transaction
1324 * Check if there are committed transaction in the distribute transaction
1325 * list, then cancel the update records for those committed transaction.
1326 * Because the distribute transaction in the list are sorted by batchid,
1327 * and cancellation will be done by batchid order, so we only check the first
1328 * the transaction(with lowest batchid) in the list.
1330 * \param[in] lod lod device where cancel thread is
1332 * \retval true if it is ready
1333 * \retval false if it is not ready
1335 static bool tdtd_ready_for_cancel_log(struct target_distribute_txn_data *tdtd)
1337 struct top_multiple_thandle *tmt = NULL;
1338 struct obd_device *obd = tdtd->tdtd_lut->lut_obd;
1341 spin_lock(&tdtd->tdtd_batchid_lock);
1342 if (!list_empty(&tdtd->tdtd_list)) {
1343 tmt = list_entry(tdtd->tdtd_list.next,
1344 struct top_multiple_thandle, tmt_commit_list);
1345 if (tmt->tmt_committed &&
1346 (!obd->obd_recovering || (obd->obd_recovering &&
1347 tmt->tmt_batchid <= tdtd->tdtd_committed_batchid)))
1350 spin_unlock(&tdtd->tdtd_batchid_lock);
1355 struct distribute_txn_bid_data {
1356 struct dt_txn_commit_cb dtbd_cb;
1357 struct target_distribute_txn_data *dtbd_tdtd;
1362 * callback of updating commit batchid
1364 * Updating commit batchid then wake up the commit thread to cancel the
1367 * \param[in]env execution environment
1368 * \param[in]th thandle to updating commit batchid
1369 * \param[in]cb commit callback
1370 * \param[in]err result of thandle
1372 static void distribute_txn_batchid_cb(struct lu_env *env,
1374 struct dt_txn_commit_cb *cb,
1377 struct distribute_txn_bid_data *dtbd = NULL;
1378 struct target_distribute_txn_data *tdtd;
1380 dtbd = container_of0(cb, struct distribute_txn_bid_data, dtbd_cb);
1381 tdtd = dtbd->dtbd_tdtd;
1383 CDEBUG(D_HA, "%s: %llu batchid updated\n",
1384 tdtd->tdtd_lut->lut_obd->obd_name, dtbd->dtbd_batchid);
1385 spin_lock(&tdtd->tdtd_batchid_lock);
1386 if (dtbd->dtbd_batchid > tdtd->tdtd_committed_batchid &&
1387 !tdtd->tdtd_lut->lut_obd->obd_no_transno)
1388 tdtd->tdtd_committed_batchid = dtbd->dtbd_batchid;
1389 spin_unlock(&tdtd->tdtd_batchid_lock);
1390 atomic_dec(&tdtd->tdtd_refcount);
1391 wake_up(&tdtd->tdtd_commit_thread_waitq);
1397 * Update the commit batchid in disk
1399 * Update commit batchid in the disk, after this is committed, it can start
1400 * to cancel the update records.
1402 * \param[in] env execution environment
1403 * \param[in] tdtd distribute transaction structure
1404 * \param[in] batchid commit batchid to be updated
1406 * \retval 0 if update succeeds.
1407 * \retval negative errno if update fails.
1410 distribute_txn_commit_batchid_update(const struct lu_env *env,
1411 struct target_distribute_txn_data *tdtd,
1414 struct distribute_txn_bid_data *dtbd = NULL;
1422 OBD_ALLOC_PTR(dtbd);
1425 dtbd->dtbd_batchid = batchid;
1426 dtbd->dtbd_tdtd = tdtd;
1427 dtbd->dtbd_cb.dcb_func = distribute_txn_batchid_cb;
1428 atomic_inc(&tdtd->tdtd_refcount);
1430 th = dt_trans_create(env, tdtd->tdtd_lut->lut_bottom);
1432 atomic_dec(&tdtd->tdtd_refcount);
1434 RETURN(PTR_ERR(th));
1437 tmp = cpu_to_le64(batchid);
1439 buf.lb_len = sizeof(tmp);
1442 rc = dt_declare_record_write(env, tdtd->tdtd_batchid_obj, &buf, off,
1447 rc = dt_trans_start_local(env, tdtd->tdtd_lut->lut_bottom, th);
1451 rc = dt_trans_cb_add(th, &dtbd->dtbd_cb);
1455 rc = dt_record_write(env, tdtd->tdtd_batchid_obj, &buf,
1458 CDEBUG(D_INFO, "%s: update batchid %llu: rc = %d\n",
1459 tdtd->tdtd_lut->lut_obd->obd_name, batchid, rc);
1462 dt_trans_stop(env, tdtd->tdtd_lut->lut_bottom, th);
1464 atomic_dec(&tdtd->tdtd_refcount);
1471 * Init commit batchid for distribute transaction.
1473 * Initialize the batchid object and get commit batchid from the object.
1475 * \param[in] env execution environment
1476 * \param[in] tdtd distribute transaction whose batchid is initialized.
1478 * \retval 0 if initialization succeeds.
1479 * \retval negative errno if initialization fails.
1482 distribute_txn_commit_batchid_init(const struct lu_env *env,
1483 struct target_distribute_txn_data *tdtd)
1485 struct tgt_thread_info *tti = tgt_th_info(env);
1486 struct lu_target *lut = tdtd->tdtd_lut;
1487 struct lu_attr *attr = &tti->tti_attr;
1488 struct lu_fid *fid = &tti->tti_fid1;
1489 struct dt_object_format *dof = &tti->tti_u.update.tti_update_dof;
1490 struct dt_object *dt_obj = NULL;
1497 memset(attr, 0, sizeof(*attr));
1498 attr->la_valid = LA_MODE;
1499 attr->la_mode = S_IFREG | S_IRUGO | S_IWUSR;
1500 dof->dof_type = dt_mode_to_dft(S_IFREG);
1502 lu_local_obj_fid(fid, BATCHID_COMMITTED_OID);
1504 dt_obj = dt_find_or_create(env, lut->lut_bottom, fid, dof,
1506 if (IS_ERR(dt_obj)) {
1507 rc = PTR_ERR(dt_obj);
1512 tdtd->tdtd_batchid_obj = dt_obj;
1515 buf.lb_len = sizeof(tmp);
1517 rc = dt_read(env, dt_obj, &buf, &off);
1518 if (rc < 0 || (rc < buf.lb_len && rc > 0)) {
1519 CERROR("%s can't read last committed batchid: rc = %d\n",
1520 tdtd->tdtd_lut->lut_obd->obd_name, rc);
1524 } else if (rc == buf.lb_len) {
1525 tdtd->tdtd_committed_batchid = le64_to_cpu(tmp);
1526 CDEBUG(D_HA, "%s: committed batchid %llu\n",
1527 tdtd->tdtd_lut->lut_obd->obd_name,
1528 tdtd->tdtd_committed_batchid);
1533 if (rc < 0 && dt_obj != NULL) {
1534 dt_object_put(env, dt_obj);
1535 tdtd->tdtd_batchid_obj = NULL;
1541 * manage the distribute transaction thread
1543 * Distribute transaction are linked to the list, and once the distribute
1544 * transaction is committed, it will update the last committed batchid first,
1545 * after it is committed, it will cancel the records.
1547 * \param[in] _arg argument for commit thread
1549 * \retval 0 if thread is running successfully
1550 * \retval negative errno if the thread can not be run.
1552 static int distribute_txn_commit_thread(void *_arg)
1554 struct target_distribute_txn_data *tdtd = _arg;
1555 struct lu_target *lut = tdtd->tdtd_lut;
1556 struct ptlrpc_thread *thread = &lut->lut_tdtd_commit_thread;
1557 struct l_wait_info lwi = { 0 };
1559 struct list_head list;
1561 struct top_multiple_thandle *tmt;
1562 struct top_multiple_thandle *tmp;
1563 __u64 batchid = 0, committed;
1567 rc = lu_env_init(&env, LCT_LOCAL | LCT_MD_THREAD);
1571 spin_lock(&tdtd->tdtd_batchid_lock);
1572 thread->t_flags = SVC_RUNNING;
1573 spin_unlock(&tdtd->tdtd_batchid_lock);
1574 wake_up(&thread->t_ctl_waitq);
1575 INIT_LIST_HEAD(&list);
1577 CDEBUG(D_HA, "%s: start commit thread committed batchid %llu\n",
1578 tdtd->tdtd_lut->lut_obd->obd_name,
1579 tdtd->tdtd_committed_batchid);
1581 while (distribute_txn_commit_thread_running(lut)) {
1582 spin_lock(&tdtd->tdtd_batchid_lock);
1583 list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
1585 if (tmt->tmt_committed == 0)
1588 /* Note: right now, replay is based on master MDT
1589 * transno, but cancellation is based on batchid.
1590 * so we do not try to cancel the update log until
1591 * the recoverying is done, unless the update records
1592 * batchid < committed_batchid. */
1593 if (tmt->tmt_batchid <= tdtd->tdtd_committed_batchid) {
1594 list_move_tail(&tmt->tmt_commit_list, &list);
1595 } else if (!tdtd->tdtd_lut->lut_obd->obd_recovering) {
1596 LASSERTF(tmt->tmt_batchid >= batchid,
1597 "tmt %p tmt_batchid: %llu, batchid "
1598 "%llu\n", tmt, tmt->tmt_batchid,
1600 /* There are three types of distribution
1601 * transaction result
1603 * 1. If tmt_result < 0, it means the
1604 * distribution transaction fails, which should
1605 * be rare, because once declare phase succeeds,
1606 * the operation should succeeds anyway. Note in
1607 * this case, we will still update batchid so
1608 * cancellation would be stopped.
1610 * 2. If tmt_result == 0, it means the
1611 * distribution transaction succeeds, and we
1612 * will update batchid.
1614 * 3. If tmt_result > 0, it means distribute
1615 * transaction is not yet committed on every
1616 * node, but we need release this tmt before
1617 * that, which usuually happens during umount.
1619 if (tmt->tmt_result <= 0)
1620 batchid = tmt->tmt_batchid;
1621 list_move_tail(&tmt->tmt_commit_list, &list);
1624 spin_unlock(&tdtd->tdtd_batchid_lock);
1626 CDEBUG(D_HA, "%s: batchid: %llu committed batchid "
1627 "%llu\n", tdtd->tdtd_lut->lut_obd->obd_name, batchid,
1628 tdtd->tdtd_committed_batchid);
1629 /* update globally committed on a storage */
1630 if (batchid > tdtd->tdtd_committed_batchid) {
1631 rc = distribute_txn_commit_batchid_update(&env, tdtd,
1636 /* cancel the records for committed batchid's */
1637 /* XXX: should we postpone cancel's till the end of recovery? */
1638 committed = tdtd->tdtd_committed_batchid;
1639 list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
1640 if (tmt->tmt_batchid > committed)
1642 list_del_init(&tmt->tmt_commit_list);
1643 if (tmt->tmt_result <= 0)
1644 distribute_txn_cancel_records(&env, tmt);
1645 top_multiple_thandle_put(tmt);
1648 l_wait_event(tdtd->tdtd_commit_thread_waitq,
1649 !distribute_txn_commit_thread_running(lut) ||
1650 committed < tdtd->tdtd_committed_batchid ||
1651 tdtd_ready_for_cancel_log(tdtd), &lwi);
1654 l_wait_event(tdtd->tdtd_commit_thread_waitq,
1655 atomic_read(&tdtd->tdtd_refcount) == 0, &lwi);
1657 spin_lock(&tdtd->tdtd_batchid_lock);
1658 list_for_each_entry_safe(tmt, tmp, &tdtd->tdtd_list,
1660 list_move_tail(&tmt->tmt_commit_list, &list);
1661 spin_unlock(&tdtd->tdtd_batchid_lock);
1663 CDEBUG(D_INFO, "%s stopping distribute txn commit thread.\n",
1664 tdtd->tdtd_lut->lut_obd->obd_name);
1665 list_for_each_entry_safe(tmt, tmp, &list, tmt_commit_list) {
1666 list_del_init(&tmt->tmt_commit_list);
1667 top_multiple_thandle_dump(tmt, D_HA);
1668 top_multiple_thandle_put(tmt);
1671 thread->t_flags = SVC_STOPPED;
1673 wake_up(&thread->t_ctl_waitq);
1679 * Start llog cancel thread
1681 * Start llog cancel(master/slave) thread on LOD
1683 * \param[in]lclt cancel log thread to be started.
1685 * \retval 0 if the thread is started successfully.
1686 * \retval negative errno if the thread is not being
1689 int distribute_txn_init(const struct lu_env *env,
1690 struct lu_target *lut,
1691 struct target_distribute_txn_data *tdtd,
1694 struct task_struct *task;
1695 struct l_wait_info lwi = { 0 };
1699 INIT_LIST_HEAD(&tdtd->tdtd_list);
1700 INIT_LIST_HEAD(&tdtd->tdtd_replay_finish_list);
1701 INIT_LIST_HEAD(&tdtd->tdtd_replay_list);
1702 spin_lock_init(&tdtd->tdtd_batchid_lock);
1703 spin_lock_init(&tdtd->tdtd_replay_list_lock);
1704 tdtd->tdtd_replay_handler = distribute_txn_replay_handle;
1705 tdtd->tdtd_replay_ready = 0;
1707 tdtd->tdtd_batchid = lut->lut_last_transno + 1;
1709 init_waitqueue_head(&lut->lut_tdtd_commit_thread.t_ctl_waitq);
1710 init_waitqueue_head(&tdtd->tdtd_commit_thread_waitq);
1711 init_waitqueue_head(&tdtd->tdtd_recovery_threads_waitq);
1712 atomic_set(&tdtd->tdtd_refcount, 0);
1713 atomic_set(&tdtd->tdtd_recovery_threads_count, 0);
1715 tdtd->tdtd_lut = lut;
1716 if (lut->lut_bottom->dd_rdonly)
1719 rc = distribute_txn_commit_batchid_init(env, tdtd);
1723 task = kthread_run(distribute_txn_commit_thread, tdtd, "dist_txn-%u",
1726 RETURN(PTR_ERR(task));
1728 l_wait_event(lut->lut_tdtd_commit_thread.t_ctl_waitq,
1729 distribute_txn_commit_thread_running(lut) ||
1730 distribute_txn_commit_thread_stopped(lut), &lwi);
1733 EXPORT_SYMBOL(distribute_txn_init);
1736 * Stop llog cancel thread
1738 * Stop llog cancel(master/slave) thread on LOD and also destory
1739 * all of transaction in the list.
1741 * \param[in]lclt cancel log thread to be stopped.
1743 void distribute_txn_fini(const struct lu_env *env,
1744 struct target_distribute_txn_data *tdtd)
1746 struct lu_target *lut = tdtd->tdtd_lut;
1748 /* Stop cancel thread */
1749 if (lut == NULL || !distribute_txn_commit_thread_running(lut))
1752 spin_lock(&tdtd->tdtd_batchid_lock);
1753 lut->lut_tdtd_commit_thread.t_flags = SVC_STOPPING;
1754 spin_unlock(&tdtd->tdtd_batchid_lock);
1755 wake_up(&tdtd->tdtd_commit_thread_waitq);
1756 wait_event(lut->lut_tdtd_commit_thread.t_ctl_waitq,
1757 lut->lut_tdtd_commit_thread.t_flags & SVC_STOPPED);
1759 dtrq_list_destroy(tdtd);
1760 if (tdtd->tdtd_batchid_obj != NULL) {
1761 dt_object_put(env, tdtd->tdtd_batchid_obj);
1762 tdtd->tdtd_batchid_obj = NULL;
1765 EXPORT_SYMBOL(distribute_txn_fini);