Lines Matching refs:clone
69 struct clone { struct
158 static enum clone_metadata_mode get_clone_mode(struct clone *clone) in get_clone_mode() argument
160 return READ_ONCE(clone->mode); in get_clone_mode()
163 static const char *clone_device_name(struct clone *clone) in clone_device_name() argument
165 return dm_table_device_name(clone->ti->table); in clone_device_name()
168 static void __set_clone_mode(struct clone *clone, enum clone_metadata_mode new_mode) in __set_clone_mode() argument
176 enum clone_metadata_mode old_mode = get_clone_mode(clone); in __set_clone_mode()
185 dm_clone_metadata_set_read_only(clone->cmd); in __set_clone_mode()
189 dm_clone_metadata_set_read_write(clone->cmd); in __set_clone_mode()
193 WRITE_ONCE(clone->mode, new_mode); in __set_clone_mode()
196 dm_table_event(clone->ti->table); in __set_clone_mode()
197 DMINFO("%s: Switching to %s mode", clone_device_name(clone), in __set_clone_mode()
202 static void __abort_transaction(struct clone *clone) in __abort_transaction() argument
204 const char *dev_name = clone_device_name(clone); in __abort_transaction()
206 if (get_clone_mode(clone) >= CM_READ_ONLY) in __abort_transaction()
210 if (dm_clone_metadata_abort(clone->cmd)) { in __abort_transaction()
212 __set_clone_mode(clone, CM_FAIL); in __abort_transaction()
216 static void __reload_in_core_bitset(struct clone *clone) in __reload_in_core_bitset() argument
218 const char *dev_name = clone_device_name(clone); in __reload_in_core_bitset()
220 if (get_clone_mode(clone) == CM_FAIL) in __reload_in_core_bitset()
225 if (dm_clone_reload_in_core_bitset(clone->cmd)) { in __reload_in_core_bitset()
227 __set_clone_mode(clone, CM_FAIL); in __reload_in_core_bitset()
231 static void __metadata_operation_failed(struct clone *clone, const char *op, int r) in __metadata_operation_failed() argument
234 clone_device_name(clone), op, r); in __metadata_operation_failed()
236 __abort_transaction(clone); in __metadata_operation_failed()
237 __set_clone_mode(clone, CM_READ_ONLY); in __metadata_operation_failed()
244 __reload_in_core_bitset(clone); in __metadata_operation_failed()
250 static inline void wakeup_hydration_waiters(struct clone *clone) in wakeup_hydration_waiters() argument
252 wake_up_all(&clone->hydration_stopped); in wakeup_hydration_waiters()
255 static inline void wake_worker(struct clone *clone) in wake_worker() argument
257 queue_work(clone->wq, &clone->worker); in wake_worker()
265 static inline void remap_to_source(struct clone *clone, struct bio *bio) in remap_to_source() argument
267 bio_set_dev(bio, clone->source_dev->bdev); in remap_to_source()
270 static inline void remap_to_dest(struct clone *clone, struct bio *bio) in remap_to_dest() argument
272 bio_set_dev(bio, clone->dest_dev->bdev); in remap_to_dest()
275 static bool bio_triggers_commit(struct clone *clone, struct bio *bio) in bio_triggers_commit() argument
278 dm_clone_changed_this_transaction(clone->cmd); in bio_triggers_commit()
282 static inline sector_t region_to_sector(struct clone *clone, unsigned long region_nr) in region_to_sector() argument
284 return ((sector_t)region_nr << clone->region_shift); in region_to_sector()
288 static inline unsigned long bio_to_region(struct clone *clone, struct bio *bio) in bio_to_region() argument
290 return (bio->bi_iter.bi_sector >> clone->region_shift); in bio_to_region()
294 static void bio_region_range(struct clone *clone, struct bio *bio, in bio_region_range() argument
299 *rs = dm_sector_div_up(bio->bi_iter.bi_sector, clone->region_size); in bio_region_range()
300 end = bio_end_sector(bio) >> clone->region_shift; in bio_region_range()
309 static inline bool is_overwrite_bio(struct clone *clone, struct bio *bio) in is_overwrite_bio() argument
311 return (bio_data_dir(bio) == WRITE && bio_sectors(bio) == clone->region_size); in is_overwrite_bio()
345 static void issue_bio(struct clone *clone, struct bio *bio) in issue_bio() argument
347 if (!bio_triggers_commit(clone, bio)) { in issue_bio()
356 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) { in issue_bio()
365 spin_lock_irq(&clone->lock); in issue_bio()
366 bio_list_add(&clone->deferred_flush_bios, bio); in issue_bio()
367 spin_unlock_irq(&clone->lock); in issue_bio()
369 wake_worker(clone); in issue_bio()
378 static void remap_and_issue(struct clone *clone, struct bio *bio) in remap_and_issue() argument
380 remap_to_dest(clone, bio); in remap_and_issue()
381 issue_bio(clone, bio); in remap_and_issue()
391 static void issue_deferred_bios(struct clone *clone, struct bio_list *bios) in issue_deferred_bios() argument
402 if (bio_triggers_commit(clone, bio)) in issue_deferred_bios()
408 spin_lock_irqsave(&clone->lock, flags); in issue_deferred_bios()
409 bio_list_merge(&clone->deferred_bios, &normal_bios); in issue_deferred_bios()
410 bio_list_merge(&clone->deferred_flush_bios, &flush_bios); in issue_deferred_bios()
411 spin_unlock_irqrestore(&clone->lock, flags); in issue_deferred_bios()
413 wake_worker(clone); in issue_deferred_bios()
416 static void complete_overwrite_bio(struct clone *clone, struct bio *bio) in complete_overwrite_bio() argument
439 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) { in complete_overwrite_bio()
448 spin_lock_irqsave(&clone->lock, flags); in complete_overwrite_bio()
449 bio_list_add(&clone->deferred_flush_completions, bio); in complete_overwrite_bio()
450 spin_unlock_irqrestore(&clone->lock, flags); in complete_overwrite_bio()
452 wake_worker(clone); in complete_overwrite_bio()
461 static void complete_discard_bio(struct clone *clone, struct bio *bio, bool success) in complete_discard_bio() argument
470 if (test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags) && success) { in complete_discard_bio()
471 remap_to_dest(clone, bio); in complete_discard_bio()
472 bio_region_range(clone, bio, &rs, &nr_regions); in complete_discard_bio()
473 trim_bio(bio, region_to_sector(clone, rs), in complete_discard_bio()
474 nr_regions << clone->region_shift); in complete_discard_bio()
480 static void process_discard_bio(struct clone *clone, struct bio *bio) in process_discard_bio() argument
484 bio_region_range(clone, bio, &rs, &nr_regions); in process_discard_bio()
490 if (WARN_ON(rs >= clone->nr_regions || (rs + nr_regions) < rs || in process_discard_bio()
491 (rs + nr_regions) > clone->nr_regions)) { in process_discard_bio()
493 clone_device_name(clone), rs, nr_regions, in process_discard_bio()
494 clone->nr_regions, in process_discard_bio()
505 if (dm_clone_is_range_hydrated(clone->cmd, rs, nr_regions)) { in process_discard_bio()
506 complete_discard_bio(clone, bio, true); in process_discard_bio()
515 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) { in process_discard_bio()
523 spin_lock_irq(&clone->lock); in process_discard_bio()
524 bio_list_add(&clone->deferred_discard_bios, bio); in process_discard_bio()
525 spin_unlock_irq(&clone->lock); in process_discard_bio()
527 wake_worker(clone); in process_discard_bio()
536 struct clone *clone; member
582 static int hash_table_init(struct clone *clone) in hash_table_init() argument
589 clone->ht = kvmalloc(sz * sizeof(struct hash_table_bucket), GFP_KERNEL); in hash_table_init()
590 if (!clone->ht) in hash_table_init()
594 bucket = clone->ht + i; in hash_table_init()
603 static void hash_table_exit(struct clone *clone) in hash_table_exit() argument
605 kvfree(clone->ht); in hash_table_exit()
608 static struct hash_table_bucket *get_hash_table_bucket(struct clone *clone, in get_hash_table_bucket() argument
611 return &clone->ht[hash_long(region_nr, HASH_TABLE_BITS)]; in get_hash_table_bucket()
668 static struct dm_clone_region_hydration *alloc_hydration(struct clone *clone) in alloc_hydration() argument
676 hd = mempool_alloc(&clone->hydration_pool, GFP_NOIO); in alloc_hydration()
677 hd->clone = clone; in alloc_hydration()
684 mempool_free(hd, &hd->clone->hydration_pool); in free_hydration()
710 struct clone *clone = hd->clone; in hydration_update_metadata() local
712 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) in hydration_update_metadata()
717 r = dm_clone_set_region_hydrated(clone->cmd, hd->region_nr); in hydration_update_metadata()
719 bucket = get_hash_table_bucket(clone, hd->region_nr); in hydration_update_metadata()
743 struct clone *clone = hd->clone; in hydration_complete() local
749 complete_overwrite_bio(clone, hd->overwrite_bio); in hydration_complete()
751 issue_deferred_bios(clone, &hd->deferred_bios); in hydration_complete()
763 if (atomic_dec_and_test(&clone->hydrations_in_flight)) in hydration_complete()
764 wakeup_hydration_waiters(clone); in hydration_complete()
772 struct clone *clone = hd->clone; in hydration_kcopyd_callback() local
777 DMERR_LIMIT("%s: hydration failed", clone_device_name(clone)); in hydration_kcopyd_callback()
794 if (test_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags) && in hydration_kcopyd_callback()
795 !atomic_read(&clone->ios_in_flight)) in hydration_kcopyd_callback()
796 wake_worker(clone); in hydration_kcopyd_callback()
804 struct clone *clone = hd->clone; in hydration_copy() local
809 region_size = clone->region_size; in hydration_copy()
813 total_size = region_to_sector(clone, nr_regions - 1); in hydration_copy()
815 if (region_end == clone->nr_regions - 1) { in hydration_copy()
820 tail_size = clone->ti->len & (region_size - 1); in hydration_copy()
829 from.bdev = clone->source_dev->bdev; in hydration_copy()
830 from.sector = region_to_sector(clone, region_start); in hydration_copy()
833 to.bdev = clone->dest_dev->bdev; in hydration_copy()
838 atomic_add(nr_regions, &clone->hydrations_in_flight); in hydration_copy()
839 dm_kcopyd_copy(clone->kcopyd_client, &from, 1, &to, 0, in hydration_copy()
866 atomic_inc(&hd->clone->hydrations_in_flight); in hydration_overwrite()
880 static void hydrate_bio_region(struct clone *clone, struct bio *bio) in hydrate_bio_region() argument
886 region_nr = bio_to_region(clone, bio); in hydrate_bio_region()
887 bucket = get_hash_table_bucket(clone, region_nr); in hydrate_bio_region()
899 if (dm_clone_is_region_hydrated(clone->cmd, region_nr)) { in hydrate_bio_region()
902 issue_bio(clone, bio); in hydrate_bio_region()
912 hd = alloc_hydration(clone); in hydrate_bio_region()
918 if (dm_clone_is_region_hydrated(clone->cmd, region_nr)) { in hydrate_bio_region()
921 issue_bio(clone, bio); in hydrate_bio_region()
939 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) { in hydrate_bio_region()
954 if (is_overwrite_bio(clone, bio)) { in hydrate_bio_region()
987 struct clone *clone = hd->clone; in __batch_hydration() local
988 unsigned int max_batch_size = READ_ONCE(clone->hydration_batch_size); in __batch_hydration()
1022 static unsigned long __start_next_hydration(struct clone *clone, in __start_next_hydration() argument
1028 unsigned long nr_regions = clone->nr_regions; in __start_next_hydration()
1030 hd = alloc_hydration(clone); in __start_next_hydration()
1034 offset = dm_clone_find_next_unhydrated_region(clone->cmd, offset); in __start_next_hydration()
1038 bucket = get_hash_table_bucket(clone, offset); in __start_next_hydration()
1041 if (!dm_clone_is_region_hydrated(clone->cmd, offset) && in __start_next_hydration()
1067 static void do_hydration(struct clone *clone) in do_hydration() argument
1070 unsigned long offset, nr_regions = clone->nr_regions; in do_hydration()
1077 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) in do_hydration()
1080 if (dm_clone_is_hydration_done(clone->cmd)) in do_hydration()
1086 atomic_inc(&clone->hydrations_in_flight); in do_hydration()
1098 offset = clone->hydration_offset; in do_hydration()
1099 while (likely(!test_bit(DM_CLONE_HYDRATION_SUSPENDED, &clone->flags)) && in do_hydration()
1100 !atomic_read(&clone->ios_in_flight) && in do_hydration()
1101 test_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags) && in do_hydration()
1103 current_volume = atomic_read(&clone->hydrations_in_flight); in do_hydration()
1106 if (current_volume > READ_ONCE(clone->hydration_threshold)) in do_hydration()
1109 offset = __start_next_hydration(clone, offset, &batch); in do_hydration()
1118 clone->hydration_offset = offset; in do_hydration()
1120 if (atomic_dec_and_test(&clone->hydrations_in_flight)) in do_hydration()
1121 wakeup_hydration_waiters(clone); in do_hydration()
1126 static bool need_commit_due_to_time(struct clone *clone) in need_commit_due_to_time() argument
1128 return !time_in_range(jiffies, clone->last_commit_jiffies, in need_commit_due_to_time()
1129 clone->last_commit_jiffies + COMMIT_PERIOD); in need_commit_due_to_time()
1135 static int commit_metadata(struct clone *clone, bool *dest_dev_flushed) in commit_metadata() argument
1142 mutex_lock(&clone->commit_lock); in commit_metadata()
1144 if (!dm_clone_changed_this_transaction(clone->cmd)) in commit_metadata()
1147 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) { in commit_metadata()
1152 r = dm_clone_metadata_pre_commit(clone->cmd); in commit_metadata()
1154 __metadata_operation_failed(clone, "dm_clone_metadata_pre_commit", r); in commit_metadata()
1158 bio_reset(&clone->flush_bio); in commit_metadata()
1159 bio_set_dev(&clone->flush_bio, clone->dest_dev->bdev); in commit_metadata()
1160 clone->flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH; in commit_metadata()
1162 r = submit_bio_wait(&clone->flush_bio); in commit_metadata()
1164 __metadata_operation_failed(clone, "flush destination device", r); in commit_metadata()
1171 r = dm_clone_metadata_commit(clone->cmd); in commit_metadata()
1173 __metadata_operation_failed(clone, "dm_clone_metadata_commit", r); in commit_metadata()
1177 if (dm_clone_is_hydration_done(clone->cmd)) in commit_metadata()
1178 dm_table_event(clone->ti->table); in commit_metadata()
1180 mutex_unlock(&clone->commit_lock); in commit_metadata()
1185 static void process_deferred_discards(struct clone *clone) in process_deferred_discards() argument
1193 spin_lock_irq(&clone->lock); in process_deferred_discards()
1194 bio_list_merge(&discards, &clone->deferred_discard_bios); in process_deferred_discards()
1195 bio_list_init(&clone->deferred_discard_bios); in process_deferred_discards()
1196 spin_unlock_irq(&clone->lock); in process_deferred_discards()
1201 if (unlikely(get_clone_mode(clone) >= CM_READ_ONLY)) in process_deferred_discards()
1206 bio_region_range(clone, bio, &rs, &nr_regions); in process_deferred_discards()
1212 r = dm_clone_cond_set_range(clone->cmd, rs, nr_regions); in process_deferred_discards()
1219 complete_discard_bio(clone, bio, r == 0); in process_deferred_discards()
1223 static void process_deferred_bios(struct clone *clone) in process_deferred_bios() argument
1227 spin_lock_irq(&clone->lock); in process_deferred_bios()
1228 bio_list_merge(&bios, &clone->deferred_bios); in process_deferred_bios()
1229 bio_list_init(&clone->deferred_bios); in process_deferred_bios()
1230 spin_unlock_irq(&clone->lock); in process_deferred_bios()
1238 static void process_deferred_flush_bios(struct clone *clone) in process_deferred_flush_bios() argument
1249 spin_lock_irq(&clone->lock); in process_deferred_flush_bios()
1250 bio_list_merge(&bios, &clone->deferred_flush_bios); in process_deferred_flush_bios()
1251 bio_list_init(&clone->deferred_flush_bios); in process_deferred_flush_bios()
1253 bio_list_merge(&bio_completions, &clone->deferred_flush_completions); in process_deferred_flush_bios()
1254 bio_list_init(&clone->deferred_flush_completions); in process_deferred_flush_bios()
1255 spin_unlock_irq(&clone->lock); in process_deferred_flush_bios()
1258 !(dm_clone_changed_this_transaction(clone->cmd) && need_commit_due_to_time(clone))) in process_deferred_flush_bios()
1261 if (commit_metadata(clone, &dest_dev_flushed)) { in process_deferred_flush_bios()
1270 clone->last_commit_jiffies = jiffies; in process_deferred_flush_bios()
1290 struct clone *clone = container_of(work, typeof(*clone), worker); in do_worker() local
1292 process_deferred_bios(clone); in do_worker()
1293 process_deferred_discards(clone); in do_worker()
1304 process_deferred_flush_bios(clone); in do_worker()
1307 do_hydration(clone); in do_worker()
1317 struct clone *clone = container_of(to_delayed_work(work), struct clone, waker); in do_waker() local
1319 wake_worker(clone); in do_waker()
1320 queue_delayed_work(clone->wq, &clone->waker, COMMIT_PERIOD); in do_waker()
1330 struct clone *clone = ti->private; in clone_map() local
1333 atomic_inc(&clone->ios_in_flight); in clone_map()
1335 if (unlikely(get_clone_mode(clone) == CM_FAIL)) in clone_map()
1346 remap_and_issue(clone, bio); in clone_map()
1358 process_discard_bio(clone, bio); in clone_map()
1372 region_nr = bio_to_region(clone, bio); in clone_map()
1373 if (dm_clone_is_region_hydrated(clone->cmd, region_nr)) { in clone_map()
1374 remap_and_issue(clone, bio); in clone_map()
1377 remap_to_source(clone, bio); in clone_map()
1381 remap_to_dest(clone, bio); in clone_map()
1382 hydrate_bio_region(clone, bio); in clone_map()
1389 struct clone *clone = ti->private; in clone_endio() local
1391 atomic_dec(&clone->ios_in_flight); in clone_endio()
1396 static void emit_flags(struct clone *clone, char *result, unsigned int maxlen, in emit_flags() argument
1402 count = !test_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags); in emit_flags()
1403 count += !test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags); in emit_flags()
1407 if (!test_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags)) in emit_flags()
1410 if (!test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags)) in emit_flags()
1416 static void emit_core_args(struct clone *clone, char *result, in emit_core_args() argument
1423 READ_ONCE(clone->hydration_threshold), in emit_core_args()
1424 READ_ONCE(clone->hydration_batch_size)); in emit_core_args()
1446 struct clone *clone = ti->private; in clone_status() local
1450 if (get_clone_mode(clone) == CM_FAIL) { in clone_status()
1457 (void) commit_metadata(clone, NULL); in clone_status()
1459 r = dm_clone_get_free_metadata_block_count(clone->cmd, &nr_free_metadata_blocks); in clone_status()
1463 clone_device_name(clone), r); in clone_status()
1467 r = dm_clone_get_metadata_dev_size(clone->cmd, &nr_metadata_blocks); in clone_status()
1471 clone_device_name(clone), r); in clone_status()
1479 (unsigned long long)clone->region_size, in clone_status()
1480 dm_clone_nr_of_hydrated_regions(clone->cmd), in clone_status()
1481 clone->nr_regions, in clone_status()
1482 atomic_read(&clone->hydrations_in_flight)); in clone_status()
1484 emit_flags(clone, result, maxlen, &sz); in clone_status()
1485 emit_core_args(clone, result, maxlen, &sz); in clone_status()
1487 switch (get_clone_mode(clone)) { in clone_status()
1501 format_dev_t(buf, clone->metadata_dev->bdev->bd_dev); in clone_status()
1504 format_dev_t(buf, clone->dest_dev->bdev->bd_dev); in clone_status()
1507 format_dev_t(buf, clone->source_dev->bdev->bd_dev); in clone_status()
1510 for (i = 0; i < clone->nr_ctr_args; i++) in clone_status()
1511 DMEMIT(" %s", clone->ctr_args[i]); in clone_status()
1546 static int parse_feature_args(struct dm_arg_set *as, struct clone *clone) in parse_feature_args() argument
1551 struct dm_target *ti = clone->ti; in parse_feature_args()
1572 __clear_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags); in parse_feature_args()
1574 __clear_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags); in parse_feature_args()
1584 static int parse_core_args(struct dm_arg_set *as, struct clone *clone) in parse_core_args() argument
1590 struct dm_target *ti = clone->ti; in parse_core_args()
1599 clone->hydration_batch_size = DEFAULT_HYDRATION_BATCH_SIZE; in parse_core_args()
1600 clone->hydration_threshold = DEFAULT_HYDRATION_THRESHOLD; in parse_core_args()
1624 clone->hydration_threshold = value; in parse_core_args()
1630 clone->hydration_batch_size = value; in parse_core_args()
1640 static int parse_region_size(struct clone *clone, struct dm_arg_set *as, char **error) in parse_region_size() argument
1661 if (region_size % (bdev_logical_block_size(clone->source_dev->bdev) >> 9) || in parse_region_size()
1662 region_size % (bdev_logical_block_size(clone->dest_dev->bdev) >> 9)) { in parse_region_size()
1667 clone->region_size = region_size; in parse_region_size()
1686 static int parse_metadata_dev(struct clone *clone, struct dm_arg_set *as, char **error) in parse_metadata_dev() argument
1692 r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE, in parse_metadata_dev()
1693 &clone->metadata_dev); in parse_metadata_dev()
1699 metadata_dev_size = get_dev_size(clone->metadata_dev); in parse_metadata_dev()
1702 bdevname(clone->metadata_dev->bdev, b), DM_CLONE_METADATA_MAX_SECTORS); in parse_metadata_dev()
1707 static int parse_dest_dev(struct clone *clone, struct dm_arg_set *as, char **error) in parse_dest_dev() argument
1712 r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ | FMODE_WRITE, in parse_dest_dev()
1713 &clone->dest_dev); in parse_dest_dev()
1719 dest_dev_size = get_dev_size(clone->dest_dev); in parse_dest_dev()
1720 if (dest_dev_size < clone->ti->len) { in parse_dest_dev()
1721 dm_put_device(clone->ti, clone->dest_dev); in parse_dest_dev()
1729 static int parse_source_dev(struct clone *clone, struct dm_arg_set *as, char **error) in parse_source_dev() argument
1734 r = dm_get_device(clone->ti, dm_shift_arg(as), FMODE_READ, in parse_source_dev()
1735 &clone->source_dev); in parse_source_dev()
1741 source_dev_size = get_dev_size(clone->source_dev); in parse_source_dev()
1742 if (source_dev_size < clone->ti->len) { in parse_source_dev()
1743 dm_put_device(clone->ti, clone->source_dev); in parse_source_dev()
1751 static int copy_ctr_args(struct clone *clone, int argc, const char **argv, char **error) in copy_ctr_args() argument
1771 clone->nr_ctr_args = argc; in copy_ctr_args()
1772 clone->ctr_args = copy; in copy_ctr_args()
1784 struct clone *clone; in clone_ctr() local
1795 clone = kzalloc(sizeof(*clone), GFP_KERNEL); in clone_ctr()
1796 if (!clone) { in clone_ctr()
1801 clone->ti = ti; in clone_ctr()
1804 __set_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags); in clone_ctr()
1805 __set_bit(DM_CLONE_HYDRATION_SUSPENDED, &clone->flags); in clone_ctr()
1806 __set_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags); in clone_ctr()
1808 r = parse_metadata_dev(clone, &as, &ti->error); in clone_ctr()
1812 r = parse_dest_dev(clone, &as, &ti->error); in clone_ctr()
1816 r = parse_source_dev(clone, &as, &ti->error); in clone_ctr()
1820 r = parse_region_size(clone, &as, &ti->error); in clone_ctr()
1824 clone->region_shift = __ffs(clone->region_size); in clone_ctr()
1825 nr_regions = dm_sector_div_up(ti->len, clone->region_size); in clone_ctr()
1834 clone->nr_regions = nr_regions; in clone_ctr()
1836 r = validate_nr_regions(clone->nr_regions, &ti->error); in clone_ctr()
1840 r = dm_set_target_max_io_len(ti, clone->region_size); in clone_ctr()
1846 r = parse_feature_args(&as, clone); in clone_ctr()
1850 r = parse_core_args(&as, clone); in clone_ctr()
1855 clone->cmd = dm_clone_metadata_open(clone->metadata_dev->bdev, ti->len, in clone_ctr()
1856 clone->region_size); in clone_ctr()
1857 if (IS_ERR(clone->cmd)) { in clone_ctr()
1859 r = PTR_ERR(clone->cmd); in clone_ctr()
1863 __set_clone_mode(clone, CM_WRITE); in clone_ctr()
1865 if (get_clone_mode(clone) != CM_WRITE) { in clone_ctr()
1871 clone->last_commit_jiffies = jiffies; in clone_ctr()
1874 r = hash_table_init(clone); in clone_ctr()
1880 atomic_set(&clone->ios_in_flight, 0); in clone_ctr()
1881 init_waitqueue_head(&clone->hydration_stopped); in clone_ctr()
1882 spin_lock_init(&clone->lock); in clone_ctr()
1883 bio_list_init(&clone->deferred_bios); in clone_ctr()
1884 bio_list_init(&clone->deferred_discard_bios); in clone_ctr()
1885 bio_list_init(&clone->deferred_flush_bios); in clone_ctr()
1886 bio_list_init(&clone->deferred_flush_completions); in clone_ctr()
1887 clone->hydration_offset = 0; in clone_ctr()
1888 atomic_set(&clone->hydrations_in_flight, 0); in clone_ctr()
1889 bio_init(&clone->flush_bio, NULL, 0); in clone_ctr()
1891 clone->wq = alloc_workqueue("dm-" DM_MSG_PREFIX, WQ_MEM_RECLAIM, 0); in clone_ctr()
1892 if (!clone->wq) { in clone_ctr()
1898 INIT_WORK(&clone->worker, do_worker); in clone_ctr()
1899 INIT_DELAYED_WORK(&clone->waker, do_waker); in clone_ctr()
1901 clone->kcopyd_client = dm_kcopyd_client_create(&dm_kcopyd_throttle); in clone_ctr()
1902 if (IS_ERR(clone->kcopyd_client)) { in clone_ctr()
1903 r = PTR_ERR(clone->kcopyd_client); in clone_ctr()
1907 r = mempool_init_slab_pool(&clone->hydration_pool, MIN_HYDRATIONS, in clone_ctr()
1915 r = copy_ctr_args(clone, argc - 3, (const char **)argv + 3, &ti->error); in clone_ctr()
1919 mutex_init(&clone->commit_lock); in clone_ctr()
1929 ti->private = clone; in clone_ctr()
1934 mempool_exit(&clone->hydration_pool); in clone_ctr()
1936 dm_kcopyd_client_destroy(clone->kcopyd_client); in clone_ctr()
1938 destroy_workqueue(clone->wq); in clone_ctr()
1940 hash_table_exit(clone); in clone_ctr()
1942 dm_clone_metadata_close(clone->cmd); in clone_ctr()
1944 dm_put_device(ti, clone->source_dev); in clone_ctr()
1946 dm_put_device(ti, clone->dest_dev); in clone_ctr()
1948 dm_put_device(ti, clone->metadata_dev); in clone_ctr()
1950 kfree(clone); in clone_ctr()
1958 struct clone *clone = ti->private; in clone_dtr() local
1960 mutex_destroy(&clone->commit_lock); in clone_dtr()
1961 bio_uninit(&clone->flush_bio); in clone_dtr()
1963 for (i = 0; i < clone->nr_ctr_args; i++) in clone_dtr()
1964 kfree(clone->ctr_args[i]); in clone_dtr()
1965 kfree(clone->ctr_args); in clone_dtr()
1967 mempool_exit(&clone->hydration_pool); in clone_dtr()
1968 dm_kcopyd_client_destroy(clone->kcopyd_client); in clone_dtr()
1969 destroy_workqueue(clone->wq); in clone_dtr()
1970 hash_table_exit(clone); in clone_dtr()
1971 dm_clone_metadata_close(clone->cmd); in clone_dtr()
1972 dm_put_device(ti, clone->source_dev); in clone_dtr()
1973 dm_put_device(ti, clone->dest_dev); in clone_dtr()
1974 dm_put_device(ti, clone->metadata_dev); in clone_dtr()
1976 kfree(clone); in clone_dtr()
1983 struct clone *clone = ti->private; in clone_postsuspend() local
2000 cancel_delayed_work_sync(&clone->waker); in clone_postsuspend()
2002 set_bit(DM_CLONE_HYDRATION_SUSPENDED, &clone->flags); in clone_postsuspend()
2013 wait_event(clone->hydration_stopped, !atomic_read(&clone->hydrations_in_flight)); in clone_postsuspend()
2014 flush_workqueue(clone->wq); in clone_postsuspend()
2016 (void) commit_metadata(clone, NULL); in clone_postsuspend()
2021 struct clone *clone = ti->private; in clone_resume() local
2023 clear_bit(DM_CLONE_HYDRATION_SUSPENDED, &clone->flags); in clone_resume()
2024 do_waker(&clone->waker.work); in clone_resume()
2038 static void disable_passdown_if_not_supported(struct clone *clone) in disable_passdown_if_not_supported() argument
2040 struct block_device *dest_dev = clone->dest_dev->bdev; in disable_passdown_if_not_supported()
2045 if (!test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags)) in disable_passdown_if_not_supported()
2050 else if (dest_limits->max_discard_sectors < clone->region_size) in disable_passdown_if_not_supported()
2056 clear_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags); in disable_passdown_if_not_supported()
2060 static void set_discard_limits(struct clone *clone, struct queue_limits *limits) in set_discard_limits() argument
2062 struct block_device *dest_bdev = clone->dest_dev->bdev; in set_discard_limits()
2065 if (!test_bit(DM_CLONE_DISCARD_PASSDOWN, &clone->flags)) { in set_discard_limits()
2067 limits->discard_granularity = clone->region_size << SECTOR_SHIFT; in set_discard_limits()
2068 limits->max_discard_sectors = round_down(UINT_MAX >> SECTOR_SHIFT, clone->region_size); in set_discard_limits()
2087 struct clone *clone = ti->private; in clone_io_hints() local
2094 if (io_opt_sectors < clone->region_size || in clone_io_hints()
2095 do_div(io_opt_sectors, clone->region_size)) { in clone_io_hints()
2096 blk_limits_io_min(limits, clone->region_size << SECTOR_SHIFT); in clone_io_hints()
2097 blk_limits_io_opt(limits, clone->region_size << SECTOR_SHIFT); in clone_io_hints()
2100 disable_passdown_if_not_supported(clone); in clone_io_hints()
2101 set_discard_limits(clone, limits); in clone_io_hints()
2108 struct clone *clone = ti->private; in clone_iterate_devices() local
2109 struct dm_dev *dest_dev = clone->dest_dev; in clone_iterate_devices()
2110 struct dm_dev *source_dev = clone->source_dev; in clone_iterate_devices()
2121 static void set_hydration_threshold(struct clone *clone, unsigned int nr_regions) in set_hydration_threshold() argument
2123 WRITE_ONCE(clone->hydration_threshold, nr_regions); in set_hydration_threshold()
2130 wake_worker(clone); in set_hydration_threshold()
2133 static void set_hydration_batch_size(struct clone *clone, unsigned int nr_regions) in set_hydration_batch_size() argument
2135 WRITE_ONCE(clone->hydration_batch_size, nr_regions); in set_hydration_batch_size()
2138 static void enable_hydration(struct clone *clone) in enable_hydration() argument
2140 if (!test_and_set_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags)) in enable_hydration()
2141 wake_worker(clone); in enable_hydration()
2144 static void disable_hydration(struct clone *clone) in disable_hydration() argument
2146 clear_bit(DM_CLONE_HYDRATION_ENABLED, &clone->flags); in disable_hydration()
2152 struct clone *clone = ti->private; in clone_message() local
2159 enable_hydration(clone); in clone_message()
2164 disable_hydration(clone); in clone_message()
2175 set_hydration_threshold(clone, value); in clone_message()
2184 set_hydration_batch_size(clone, value); in clone_message()
2189 DMERR("%s: Unsupported message `%s'", clone_device_name(clone), argv[0]); in clone_message()