Lines Matching refs:cache
297 struct cache { struct
421 struct cache *cache; member
433 static bool writethrough_mode(struct cache *cache) in writethrough_mode() argument
435 return cache->features.io_mode == CM_IO_WRITETHROUGH; in writethrough_mode()
438 static bool writeback_mode(struct cache *cache) in writeback_mode() argument
440 return cache->features.io_mode == CM_IO_WRITEBACK; in writeback_mode()
443 static inline bool passthrough_mode(struct cache *cache) in passthrough_mode() argument
445 return unlikely(cache->features.io_mode == CM_IO_PASSTHROUGH); in passthrough_mode()
450 static void wake_deferred_bio_worker(struct cache *cache) in wake_deferred_bio_worker() argument
452 queue_work(cache->wq, &cache->deferred_bio_worker); in wake_deferred_bio_worker()
455 static void wake_migration_worker(struct cache *cache) in wake_migration_worker() argument
457 if (passthrough_mode(cache)) in wake_migration_worker()
460 queue_work(cache->wq, &cache->migration_worker); in wake_migration_worker()
465 static struct dm_bio_prison_cell_v2 *alloc_prison_cell(struct cache *cache) in alloc_prison_cell() argument
467 return dm_bio_prison_alloc_cell_v2(cache->prison, GFP_NOIO); in alloc_prison_cell()
470 static void free_prison_cell(struct cache *cache, struct dm_bio_prison_cell_v2 *cell) in free_prison_cell() argument
472 dm_bio_prison_free_cell_v2(cache->prison, cell); in free_prison_cell()
475 static struct dm_cache_migration *alloc_migration(struct cache *cache) in alloc_migration() argument
479 mg = mempool_alloc(&cache->migration_pool, GFP_NOIO); in alloc_migration()
483 mg->cache = cache; in alloc_migration()
484 atomic_inc(&cache->nr_allocated_migrations); in alloc_migration()
491 struct cache *cache = mg->cache; in free_migration() local
493 if (atomic_dec_and_test(&cache->nr_allocated_migrations)) in free_migration()
494 wake_up(&cache->migration_wait); in free_migration()
496 mempool_free(mg, &cache->migration_pool); in free_migration()
556 static void defer_bio(struct cache *cache, struct bio *bio) in defer_bio() argument
558 spin_lock_irq(&cache->lock); in defer_bio()
559 bio_list_add(&cache->deferred_bios, bio); in defer_bio()
560 spin_unlock_irq(&cache->lock); in defer_bio()
562 wake_deferred_bio_worker(cache); in defer_bio()
565 static void defer_bios(struct cache *cache, struct bio_list *bios) in defer_bios() argument
567 spin_lock_irq(&cache->lock); in defer_bios()
568 bio_list_merge(&cache->deferred_bios, bios); in defer_bios()
570 spin_unlock_irq(&cache->lock); in defer_bios()
572 wake_deferred_bio_worker(cache); in defer_bios()
577 static bool bio_detain_shared(struct cache *cache, dm_oblock_t oblock, struct bio *bio) in bio_detain_shared() argument
585 cell_prealloc = alloc_prison_cell(cache); /* FIXME: allow wait if calling from worker */ in bio_detain_shared()
588 r = dm_cell_get_v2(cache->prison, &key, lock_level(bio), bio, cell_prealloc, &cell); in bio_detain_shared()
593 free_prison_cell(cache, cell_prealloc); in bio_detain_shared()
598 free_prison_cell(cache, cell_prealloc); in bio_detain_shared()
608 static bool is_dirty(struct cache *cache, dm_cblock_t b) in is_dirty() argument
610 return test_bit(from_cblock(b), cache->dirty_bitset); in is_dirty()
613 static void set_dirty(struct cache *cache, dm_cblock_t cblock) in set_dirty() argument
615 if (!test_and_set_bit(from_cblock(cblock), cache->dirty_bitset)) { in set_dirty()
616 atomic_inc(&cache->nr_dirty); in set_dirty()
617 policy_set_dirty(cache->policy, cblock); in set_dirty()
625 static void force_set_dirty(struct cache *cache, dm_cblock_t cblock) in force_set_dirty() argument
627 if (!test_and_set_bit(from_cblock(cblock), cache->dirty_bitset)) in force_set_dirty()
628 atomic_inc(&cache->nr_dirty); in force_set_dirty()
629 policy_set_dirty(cache->policy, cblock); in force_set_dirty()
632 static void force_clear_dirty(struct cache *cache, dm_cblock_t cblock) in force_clear_dirty() argument
634 if (test_and_clear_bit(from_cblock(cblock), cache->dirty_bitset)) { in force_clear_dirty()
635 if (atomic_dec_return(&cache->nr_dirty) == 0) in force_clear_dirty()
636 dm_table_event(cache->ti->table); in force_clear_dirty()
639 policy_clear_dirty(cache->policy, cblock); in force_clear_dirty()
644 static bool block_size_is_power_of_two(struct cache *cache) in block_size_is_power_of_two() argument
646 return cache->sectors_per_block_shift >= 0; in block_size_is_power_of_two()
656 static dm_block_t oblocks_per_dblock(struct cache *cache) in oblocks_per_dblock() argument
658 dm_block_t oblocks = cache->discard_block_size; in oblocks_per_dblock()
660 if (block_size_is_power_of_two(cache)) in oblocks_per_dblock()
661 oblocks >>= cache->sectors_per_block_shift; in oblocks_per_dblock()
663 oblocks = block_div(oblocks, cache->sectors_per_block); in oblocks_per_dblock()
668 static dm_dblock_t oblock_to_dblock(struct cache *cache, dm_oblock_t oblock) in oblock_to_dblock() argument
671 oblocks_per_dblock(cache))); in oblock_to_dblock()
674 static void set_discard(struct cache *cache, dm_dblock_t b) in set_discard() argument
676 BUG_ON(from_dblock(b) >= from_dblock(cache->discard_nr_blocks)); in set_discard()
677 atomic_inc(&cache->stats.discard_count); in set_discard()
679 spin_lock_irq(&cache->lock); in set_discard()
680 set_bit(from_dblock(b), cache->discard_bitset); in set_discard()
681 spin_unlock_irq(&cache->lock); in set_discard()
684 static void clear_discard(struct cache *cache, dm_dblock_t b) in clear_discard() argument
686 spin_lock_irq(&cache->lock); in clear_discard()
687 clear_bit(from_dblock(b), cache->discard_bitset); in clear_discard()
688 spin_unlock_irq(&cache->lock); in clear_discard()
691 static bool is_discarded(struct cache *cache, dm_dblock_t b) in is_discarded() argument
695 spin_lock_irq(&cache->lock); in is_discarded()
696 r = test_bit(from_dblock(b), cache->discard_bitset); in is_discarded()
697 spin_unlock_irq(&cache->lock); in is_discarded()
702 static bool is_discarded_oblock(struct cache *cache, dm_oblock_t b) in is_discarded_oblock() argument
706 spin_lock_irq(&cache->lock); in is_discarded_oblock()
707 r = test_bit(from_dblock(oblock_to_dblock(cache, b)), in is_discarded_oblock()
708 cache->discard_bitset); in is_discarded_oblock()
709 spin_unlock_irq(&cache->lock); in is_discarded_oblock()
719 static void remap_to_origin(struct cache *cache, struct bio *bio) in remap_to_origin() argument
721 bio_set_dev(bio, cache->origin_dev->bdev); in remap_to_origin()
724 static void remap_to_cache(struct cache *cache, struct bio *bio, in remap_to_cache() argument
730 bio_set_dev(bio, cache->cache_dev->bdev); in remap_to_cache()
731 if (!block_size_is_power_of_two(cache)) in remap_to_cache()
733 (block * cache->sectors_per_block) + in remap_to_cache()
734 sector_div(bi_sector, cache->sectors_per_block); in remap_to_cache()
737 (block << cache->sectors_per_block_shift) | in remap_to_cache()
738 (bi_sector & (cache->sectors_per_block - 1)); in remap_to_cache()
741 static void check_if_tick_bio_needed(struct cache *cache, struct bio *bio) in check_if_tick_bio_needed() argument
745 spin_lock_irq(&cache->lock); in check_if_tick_bio_needed()
746 if (cache->need_tick_bio && !op_is_flush(bio->bi_opf) && in check_if_tick_bio_needed()
750 cache->need_tick_bio = false; in check_if_tick_bio_needed()
752 spin_unlock_irq(&cache->lock); in check_if_tick_bio_needed()
755 static void remap_to_origin_clear_discard(struct cache *cache, struct bio *bio, in remap_to_origin_clear_discard() argument
759 check_if_tick_bio_needed(cache, bio); in remap_to_origin_clear_discard()
760 remap_to_origin(cache, bio); in remap_to_origin_clear_discard()
762 clear_discard(cache, oblock_to_dblock(cache, oblock)); in remap_to_origin_clear_discard()
765 static void remap_to_cache_dirty(struct cache *cache, struct bio *bio, in remap_to_cache_dirty() argument
768 check_if_tick_bio_needed(cache, bio); in remap_to_cache_dirty()
769 remap_to_cache(cache, bio, cblock); in remap_to_cache_dirty()
771 set_dirty(cache, cblock); in remap_to_cache_dirty()
772 clear_discard(cache, oblock_to_dblock(cache, oblock)); in remap_to_cache_dirty()
776 static dm_oblock_t get_bio_block(struct cache *cache, struct bio *bio) in get_bio_block() argument
780 if (!block_size_is_power_of_two(cache)) in get_bio_block()
781 (void) sector_div(block_nr, cache->sectors_per_block); in get_bio_block()
783 block_nr >>= cache->sectors_per_block_shift; in get_bio_block()
788 static bool accountable_bio(struct cache *cache, struct bio *bio) in accountable_bio() argument
793 static void accounted_begin(struct cache *cache, struct bio *bio) in accounted_begin() argument
797 if (accountable_bio(cache, bio)) { in accounted_begin()
800 dm_iot_io_begin(&cache->tracker, pb->len); in accounted_begin()
804 static void accounted_complete(struct cache *cache, struct bio *bio) in accounted_complete() argument
808 dm_iot_io_end(&cache->tracker, pb->len); in accounted_complete()
811 static void accounted_request(struct cache *cache, struct bio *bio) in accounted_request() argument
813 accounted_begin(cache, bio); in accounted_request()
819 struct cache *cache = context; in issue_op() local
821 accounted_request(cache, bio); in issue_op()
828 static void remap_to_origin_and_cache(struct cache *cache, struct bio *bio, in remap_to_origin_and_cache() argument
831 struct bio *origin_bio = bio_alloc_clone(cache->origin_dev->bdev, bio, in remap_to_origin_and_cache()
832 GFP_NOIO, &cache->bs); in remap_to_origin_and_cache()
839 clear_discard(cache, oblock_to_dblock(cache, oblock)); in remap_to_origin_and_cache()
842 remap_to_cache(cache, bio, cblock); in remap_to_origin_and_cache()
850 static enum cache_metadata_mode get_cache_mode(struct cache *cache) in get_cache_mode() argument
852 return cache->features.mode; in get_cache_mode()
855 static const char *cache_device_name(struct cache *cache) in cache_device_name() argument
857 return dm_table_device_name(cache->ti->table); in cache_device_name()
860 static void notify_mode_switch(struct cache *cache, enum cache_metadata_mode mode) in notify_mode_switch() argument
868 dm_table_event(cache->ti->table); in notify_mode_switch()
870 cache_device_name(cache), descs[(int)mode]); in notify_mode_switch()
873 static void set_cache_mode(struct cache *cache, enum cache_metadata_mode new_mode) in set_cache_mode() argument
876 enum cache_metadata_mode old_mode = get_cache_mode(cache); in set_cache_mode()
878 if (dm_cache_metadata_needs_check(cache->cmd, &needs_check)) { in set_cache_mode()
880 cache_device_name(cache)); in set_cache_mode()
886 cache_device_name(cache)); in set_cache_mode()
900 dm_cache_metadata_set_read_only(cache->cmd); in set_cache_mode()
904 dm_cache_metadata_set_read_write(cache->cmd); in set_cache_mode()
908 cache->features.mode = new_mode; in set_cache_mode()
911 notify_mode_switch(cache, new_mode); in set_cache_mode()
914 static void abort_transaction(struct cache *cache) in abort_transaction() argument
916 const char *dev_name = cache_device_name(cache); in abort_transaction()
918 if (get_cache_mode(cache) >= CM_READ_ONLY) in abort_transaction()
922 if (dm_cache_metadata_abort(cache->cmd)) { in abort_transaction()
924 set_cache_mode(cache, CM_FAIL); in abort_transaction()
927 if (dm_cache_metadata_set_needs_check(cache->cmd)) { in abort_transaction()
929 set_cache_mode(cache, CM_FAIL); in abort_transaction()
933 static void metadata_operation_failed(struct cache *cache, const char *op, int r) in metadata_operation_failed() argument
936 cache_device_name(cache), op, r); in metadata_operation_failed()
937 abort_transaction(cache); in metadata_operation_failed()
938 set_cache_mode(cache, CM_READ_ONLY); in metadata_operation_failed()
943 static void load_stats(struct cache *cache) in load_stats() argument
947 dm_cache_metadata_get_stats(cache->cmd, &stats); in load_stats()
948 atomic_set(&cache->stats.read_hit, stats.read_hits); in load_stats()
949 atomic_set(&cache->stats.read_miss, stats.read_misses); in load_stats()
950 atomic_set(&cache->stats.write_hit, stats.write_hits); in load_stats()
951 atomic_set(&cache->stats.write_miss, stats.write_misses); in load_stats()
954 static void save_stats(struct cache *cache) in save_stats() argument
958 if (get_cache_mode(cache) >= CM_READ_ONLY) in save_stats()
961 stats.read_hits = atomic_read(&cache->stats.read_hit); in save_stats()
962 stats.read_misses = atomic_read(&cache->stats.read_miss); in save_stats()
963 stats.write_hits = atomic_read(&cache->stats.write_hit); in save_stats()
964 stats.write_misses = atomic_read(&cache->stats.write_miss); in save_stats()
966 dm_cache_metadata_set_stats(cache->cmd, &stats); in save_stats()
994 static void inc_io_migrations(struct cache *cache) in inc_io_migrations() argument
996 atomic_inc(&cache->nr_io_migrations); in inc_io_migrations()
999 static void dec_io_migrations(struct cache *cache) in dec_io_migrations() argument
1001 atomic_dec(&cache->nr_io_migrations); in dec_io_migrations()
1009 static void calc_discard_block_range(struct cache *cache, struct bio *bio, in calc_discard_block_range() argument
1015 *b = to_dblock(dm_sector_div_up(sb, cache->discard_block_size)); in calc_discard_block_range()
1017 if (se - sb < cache->discard_block_size) in calc_discard_block_range()
1020 *e = to_dblock(block_div(se, cache->discard_block_size)); in calc_discard_block_range()
1025 static void prevent_background_work(struct cache *cache) in prevent_background_work() argument
1028 down_write(&cache->background_work_lock); in prevent_background_work()
1032 static void allow_background_work(struct cache *cache) in allow_background_work() argument
1035 up_write(&cache->background_work_lock); in allow_background_work()
1039 static bool background_work_begin(struct cache *cache) in background_work_begin() argument
1044 r = down_read_trylock(&cache->background_work_lock); in background_work_begin()
1050 static void background_work_end(struct cache *cache) in background_work_end() argument
1053 up_read(&cache->background_work_lock); in background_work_end()
1059 static bool bio_writes_complete_block(struct cache *cache, struct bio *bio) in bio_writes_complete_block() argument
1062 (bio->bi_iter.bi_size == (cache->sectors_per_block << SECTOR_SHIFT)); in bio_writes_complete_block()
1065 static bool optimisable_bio(struct cache *cache, struct bio *bio, dm_oblock_t block) in optimisable_bio() argument
1067 return writeback_mode(cache) && in optimisable_bio()
1068 (is_discarded_oblock(cache, block) || bio_writes_complete_block(cache, bio)); in optimisable_bio()
1075 dm_cell_quiesce_v2(mg->cache->prison, mg->cell, &mg->k.ws); in quiesce()
1092 queue_continuation(mg->cache->wq, &mg->k); in copy_complete()
1098 struct cache *cache = mg->cache; in copy() local
1100 o_region.bdev = cache->origin_dev->bdev; in copy()
1101 o_region.sector = from_oblock(mg->op->oblock) * cache->sectors_per_block; in copy()
1102 o_region.count = cache->sectors_per_block; in copy()
1104 c_region.bdev = cache->cache_dev->bdev; in copy()
1105 c_region.sector = from_cblock(mg->op->cblock) * cache->sectors_per_block; in copy()
1106 c_region.count = cache->sectors_per_block; in copy()
1109 dm_kcopyd_copy(cache->copier, &o_region, 1, &c_region, 0, copy_complete, &mg->k); in copy()
1111 dm_kcopyd_copy(cache->copier, &c_region, 1, &o_region, 0, copy_complete, &mg->k); in copy()
1114 static void bio_drop_shared_lock(struct cache *cache, struct bio *bio) in bio_drop_shared_lock() argument
1118 if (pb->cell && dm_cell_put_v2(cache->prison, pb->cell)) in bio_drop_shared_lock()
1119 free_prison_cell(cache, pb->cell); in bio_drop_shared_lock()
1126 struct cache *cache = mg->cache; in overwrite_endio() local
1134 queue_continuation(cache->wq, &mg->k); in overwrite_endio()
1150 remap_to_cache(mg->cache, bio, mg->op->cblock); in overwrite()
1152 remap_to_origin(mg->cache, bio); in overwrite()
1155 accounted_request(mg->cache, bio); in overwrite()
1172 struct cache *cache = mg->cache; in mg_complete() local
1177 update_stats(&cache->stats, op->op); in mg_complete()
1181 clear_discard(cache, oblock_to_dblock(cache, op->oblock)); in mg_complete()
1182 policy_complete_background_work(cache->policy, op, success); in mg_complete()
1186 force_set_dirty(cache, cblock); in mg_complete()
1194 force_clear_dirty(cache, cblock); in mg_complete()
1195 dec_io_migrations(cache); in mg_complete()
1204 force_clear_dirty(cache, cblock); in mg_complete()
1205 policy_complete_background_work(cache->policy, op, success); in mg_complete()
1206 dec_io_migrations(cache); in mg_complete()
1211 force_clear_dirty(cache, cblock); in mg_complete()
1212 policy_complete_background_work(cache->policy, op, success); in mg_complete()
1213 dec_io_migrations(cache); in mg_complete()
1219 if (dm_cell_unlock_v2(cache->prison, mg->cell, &bios)) in mg_complete()
1220 free_prison_cell(cache, mg->cell); in mg_complete()
1224 defer_bios(cache, &bios); in mg_complete()
1225 wake_migration_worker(cache); in mg_complete()
1227 background_work_end(cache); in mg_complete()
1241 struct cache *cache = mg->cache; in mg_update_metadata() local
1246 r = dm_cache_insert_mapping(cache->cmd, op->cblock, op->oblock); in mg_update_metadata()
1249 cache_device_name(cache)); in mg_update_metadata()
1250 metadata_operation_failed(cache, "dm_cache_insert_mapping", r); in mg_update_metadata()
1259 r = dm_cache_remove_mapping(cache->cmd, op->cblock); in mg_update_metadata()
1262 cache_device_name(cache)); in mg_update_metadata()
1263 metadata_operation_failed(cache, "dm_cache_remove_mapping", r); in mg_update_metadata()
1289 continue_after_commit(&cache->committer, &mg->k); in mg_update_metadata()
1290 schedule_commit(&cache->committer); in mg_update_metadata()
1327 r = dm_cell_lock_promote_v2(mg->cache->prison, mg->cell, in mg_upgrade_lock()
1343 struct cache *cache = mg->cache; in mg_full_copy() local
1347 if ((!is_policy_promote && !is_dirty(cache, op->cblock)) || in mg_full_copy()
1348 is_discarded_oblock(cache, op->oblock)) { in mg_full_copy()
1367 if (!optimisable_bio(mg->cache, mg->overwrite_bio, mg->op->oblock)) { in mg_copy()
1371 bool rb = bio_detain_shared(mg->cache, mg->op->oblock, mg->overwrite_bio); in mg_copy()
1375 inc_io_migrations(mg->cache); in mg_copy()
1397 struct cache *cache = mg->cache; in mg_lock_writes() local
1400 prealloc = alloc_prison_cell(cache); in mg_lock_writes()
1408 r = dm_cell_lock_v2(cache->prison, &key, in mg_lock_writes()
1412 free_prison_cell(cache, prealloc); in mg_lock_writes()
1418 free_prison_cell(cache, prealloc); in mg_lock_writes()
1428 static int mg_start(struct cache *cache, struct policy_work *op, struct bio *bio) in mg_start() argument
1432 if (!background_work_begin(cache)) { in mg_start()
1433 policy_complete_background_work(cache->policy, op, false); in mg_start()
1437 mg = alloc_migration(cache); in mg_start()
1443 inc_io_migrations(cache); in mg_start()
1457 struct cache *cache = mg->cache; in invalidate_complete() local
1460 if (dm_cell_unlock_v2(cache->prison, mg->cell, &bios)) in invalidate_complete()
1461 free_prison_cell(cache, mg->cell); in invalidate_complete()
1467 defer_bios(cache, &bios); in invalidate_complete()
1469 background_work_end(cache); in invalidate_complete()
1479 static int invalidate_cblock(struct cache *cache, dm_cblock_t cblock) in invalidate_cblock() argument
1483 r = policy_invalidate_mapping(cache->policy, cblock); in invalidate_cblock()
1485 r = dm_cache_remove_mapping(cache->cmd, cblock); in invalidate_cblock()
1488 cache_device_name(cache)); in invalidate_cblock()
1489 metadata_operation_failed(cache, "dm_cache_remove_mapping", r); in invalidate_cblock()
1499 DMERR("%s: policy_invalidate_mapping failed", cache_device_name(cache)); in invalidate_cblock()
1508 struct cache *cache = mg->cache; in invalidate_remove() local
1510 r = invalidate_cblock(cache, mg->invalidate_cblock); in invalidate_remove()
1517 continue_after_commit(&cache->committer, &mg->k); in invalidate_remove()
1518 remap_to_origin_clear_discard(cache, mg->overwrite_bio, mg->invalidate_oblock); in invalidate_remove()
1520 schedule_commit(&cache->committer); in invalidate_remove()
1527 struct cache *cache = mg->cache; in invalidate_lock() local
1530 prealloc = alloc_prison_cell(cache); in invalidate_lock()
1533 r = dm_cell_lock_v2(cache->prison, &key, in invalidate_lock()
1536 free_prison_cell(cache, prealloc); in invalidate_lock()
1542 free_prison_cell(cache, prealloc); in invalidate_lock()
1553 queue_work(cache->wq, &mg->k.ws); in invalidate_lock()
1559 static int invalidate_start(struct cache *cache, dm_cblock_t cblock, in invalidate_start() argument
1564 if (!background_work_begin(cache)) in invalidate_start()
1567 mg = alloc_migration(cache); in invalidate_start()
1587 static enum busy spare_migration_bandwidth(struct cache *cache) in spare_migration_bandwidth() argument
1589 bool idle = dm_iot_idle_for(&cache->tracker, HZ); in spare_migration_bandwidth()
1590 sector_t current_volume = (atomic_read(&cache->nr_io_migrations) + 1) * in spare_migration_bandwidth()
1591 cache->sectors_per_block; in spare_migration_bandwidth()
1593 if (idle && current_volume <= cache->migration_threshold) in spare_migration_bandwidth()
1599 static void inc_hit_counter(struct cache *cache, struct bio *bio) in inc_hit_counter() argument
1602 &cache->stats.read_hit : &cache->stats.write_hit); in inc_hit_counter()
1605 static void inc_miss_counter(struct cache *cache, struct bio *bio) in inc_miss_counter() argument
1608 &cache->stats.read_miss : &cache->stats.write_miss); in inc_miss_counter()
1613 static int map_bio(struct cache *cache, struct bio *bio, dm_oblock_t block, in map_bio() argument
1622 rb = bio_detain_shared(cache, block, bio); in map_bio()
1636 if (optimisable_bio(cache, bio, block)) { in map_bio()
1639 r = policy_lookup_with_work(cache->policy, block, &cblock, data_dir, true, &op); in map_bio()
1642 cache_device_name(cache), r); in map_bio()
1648 bio_drop_shared_lock(cache, bio); in map_bio()
1650 mg_start(cache, op, bio); in map_bio()
1654 r = policy_lookup(cache->policy, block, &cblock, data_dir, false, &background_queued); in map_bio()
1657 cache_device_name(cache), r); in map_bio()
1663 wake_migration_worker(cache); in map_bio()
1672 inc_miss_counter(cache, bio); in map_bio()
1674 accounted_begin(cache, bio); in map_bio()
1675 remap_to_origin_clear_discard(cache, bio, block); in map_bio()
1688 inc_hit_counter(cache, bio); in map_bio()
1694 if (passthrough_mode(cache)) { in map_bio()
1696 bio_drop_shared_lock(cache, bio); in map_bio()
1697 atomic_inc(&cache->stats.demotion); in map_bio()
1698 invalidate_start(cache, cblock, block, bio); in map_bio()
1700 remap_to_origin_clear_discard(cache, bio, block); in map_bio()
1702 if (bio_data_dir(bio) == WRITE && writethrough_mode(cache) && in map_bio()
1703 !is_dirty(cache, cblock)) { in map_bio()
1704 remap_to_origin_and_cache(cache, bio, block, cblock); in map_bio()
1705 accounted_begin(cache, bio); in map_bio()
1707 remap_to_cache_dirty(cache, bio, block, cblock); in map_bio()
1719 accounted_complete(cache, bio); in map_bio()
1720 issue_after_commit(&cache->committer, bio); in map_bio()
1728 static bool process_bio(struct cache *cache, struct bio *bio) in process_bio() argument
1732 if (map_bio(cache, bio, get_bio_block(cache, bio), &commit_needed) == DM_MAPIO_REMAPPED) in process_bio()
1741 static int commit(struct cache *cache, bool clean_shutdown) in commit() argument
1745 if (get_cache_mode(cache) >= CM_READ_ONLY) in commit()
1748 atomic_inc(&cache->stats.commit_count); in commit()
1749 r = dm_cache_commit(cache->cmd, clean_shutdown); in commit()
1751 metadata_operation_failed(cache, "dm_cache_commit", r); in commit()
1761 struct cache *cache = context; in commit_op() local
1763 if (dm_cache_changed_this_transaction(cache->cmd)) in commit_op()
1764 return errno_to_blk_status(commit(cache, false)); in commit_op()
1771 static bool process_flush_bio(struct cache *cache, struct bio *bio) in process_flush_bio() argument
1776 remap_to_origin(cache, bio); in process_flush_bio()
1778 remap_to_cache(cache, bio, 0); in process_flush_bio()
1780 issue_after_commit(&cache->committer, bio); in process_flush_bio()
1784 static bool process_discard_bio(struct cache *cache, struct bio *bio) in process_discard_bio() argument
1793 calc_discard_block_range(cache, bio, &b, &e); in process_discard_bio()
1795 set_discard(cache, b); in process_discard_bio()
1799 if (cache->features.discard_passdown) { in process_discard_bio()
1800 remap_to_origin(cache, bio); in process_discard_bio()
1810 struct cache *cache = container_of(ws, struct cache, deferred_bio_worker); in process_deferred_bios() local
1818 spin_lock_irq(&cache->lock); in process_deferred_bios()
1819 bio_list_merge(&bios, &cache->deferred_bios); in process_deferred_bios()
1820 bio_list_init(&cache->deferred_bios); in process_deferred_bios()
1821 spin_unlock_irq(&cache->lock); in process_deferred_bios()
1825 commit_needed = process_flush_bio(cache, bio) || commit_needed; in process_deferred_bios()
1828 commit_needed = process_discard_bio(cache, bio) || commit_needed; in process_deferred_bios()
1831 commit_needed = process_bio(cache, bio) || commit_needed; in process_deferred_bios()
1836 schedule_commit(&cache->committer); in process_deferred_bios()
1844 static void requeue_deferred_bios(struct cache *cache) in requeue_deferred_bios() argument
1850 bio_list_merge(&bios, &cache->deferred_bios); in requeue_deferred_bios()
1851 bio_list_init(&cache->deferred_bios); in requeue_deferred_bios()
1866 struct cache *cache = container_of(to_delayed_work(ws), struct cache, waker); in do_waker() local
1868 policy_tick(cache->policy, true); in do_waker()
1869 wake_migration_worker(cache); in do_waker()
1870 schedule_commit(&cache->committer); in do_waker()
1871 queue_delayed_work(cache->wq, &cache->waker, COMMIT_PERIOD); in do_waker()
1878 struct cache *cache = container_of(ws, struct cache, migration_worker); in check_migrations() local
1882 b = spare_migration_bandwidth(cache); in check_migrations()
1884 r = policy_get_background_work(cache->policy, b == IDLE, &op); in check_migrations()
1890 cache_device_name(cache)); in check_migrations()
1894 r = mg_start(cache, op, NULL); in check_migrations()
1912 static void destroy(struct cache *cache) in destroy() argument
1916 mempool_exit(&cache->migration_pool); in destroy()
1918 if (cache->prison) in destroy()
1919 dm_bio_prison_destroy_v2(cache->prison); in destroy()
1921 cancel_delayed_work_sync(&cache->waker); in destroy()
1922 if (cache->wq) in destroy()
1923 destroy_workqueue(cache->wq); in destroy()
1925 if (cache->dirty_bitset) in destroy()
1926 free_bitset(cache->dirty_bitset); in destroy()
1928 if (cache->discard_bitset) in destroy()
1929 free_bitset(cache->discard_bitset); in destroy()
1931 if (cache->copier) in destroy()
1932 dm_kcopyd_client_destroy(cache->copier); in destroy()
1934 if (cache->cmd) in destroy()
1935 dm_cache_metadata_close(cache->cmd); in destroy()
1937 if (cache->metadata_dev) in destroy()
1938 dm_put_device(cache->ti, cache->metadata_dev); in destroy()
1940 if (cache->origin_dev) in destroy()
1941 dm_put_device(cache->ti, cache->origin_dev); in destroy()
1943 if (cache->cache_dev) in destroy()
1944 dm_put_device(cache->ti, cache->cache_dev); in destroy()
1946 if (cache->policy) in destroy()
1947 dm_cache_policy_destroy(cache->policy); in destroy()
1949 for (i = 0; i < cache->nr_ctr_args ; i++) in destroy()
1950 kfree(cache->ctr_args[i]); in destroy()
1951 kfree(cache->ctr_args); in destroy()
1953 bioset_exit(&cache->bs); in destroy()
1955 kfree(cache); in destroy()
1960 struct cache *cache = ti->private; in cache_dtr() local
1962 destroy(cache); in cache_dtr()
2268 static int process_config_option(struct cache *cache, const char *key, const char *value) in process_config_option() argument
2276 cache->migration_threshold = tmp; in process_config_option()
2283 static int set_config_value(struct cache *cache, const char *key, const char *value) in set_config_value() argument
2285 int r = process_config_option(cache, key, value); in set_config_value()
2288 r = policy_set_config_value(cache->policy, key, value); in set_config_value()
2296 static int set_config_values(struct cache *cache, int argc, const char **argv) in set_config_values() argument
2306 r = set_config_value(cache, argv[0], argv[1]); in set_config_values()
2317 static int create_cache_policy(struct cache *cache, struct cache_args *ca, in create_cache_policy() argument
2321 cache->cache_size, in create_cache_policy()
2322 cache->origin_sectors, in create_cache_policy()
2323 cache->sectors_per_block); in create_cache_policy()
2328 cache->policy = p; in create_cache_policy()
2329 BUG_ON(!cache->policy); in create_cache_policy()
2360 static void set_cache_size(struct cache *cache, dm_cblock_t size) in set_cache_size() argument
2364 if (nr_blocks > (1 << 20) && cache->cache_size != size) in set_cache_size()
2370 cache->cache_size = size; in set_cache_size()
2375 static int cache_create(struct cache_args *ca, struct cache **result) in cache_create()
2379 struct cache *cache; in cache_create() local
2385 cache = kzalloc(sizeof(*cache), GFP_KERNEL); in cache_create()
2386 if (!cache) in cache_create()
2389 cache->ti = ca->ti; in cache_create()
2390 ti->private = cache; in cache_create()
2400 cache->features = ca->features; in cache_create()
2401 if (writethrough_mode(cache)) { in cache_create()
2403 r = bioset_init(&cache->bs, BIO_POOL_SIZE, 0, 0); in cache_create()
2408 cache->metadata_dev = ca->metadata_dev; in cache_create()
2409 cache->origin_dev = ca->origin_dev; in cache_create()
2410 cache->cache_dev = ca->cache_dev; in cache_create()
2414 origin_blocks = cache->origin_sectors = ca->origin_sectors; in cache_create()
2416 cache->origin_blocks = to_oblock(origin_blocks); in cache_create()
2418 cache->sectors_per_block = ca->block_size; in cache_create()
2419 if (dm_set_target_max_io_len(ti, cache->sectors_per_block)) { in cache_create()
2427 cache->sectors_per_block_shift = -1; in cache_create()
2429 set_cache_size(cache, to_cblock(cache_size)); in cache_create()
2431 cache->sectors_per_block_shift = __ffs(ca->block_size); in cache_create()
2432 set_cache_size(cache, to_cblock(ca->cache_sectors >> cache->sectors_per_block_shift)); in cache_create()
2435 r = create_cache_policy(cache, ca, error); in cache_create()
2439 cache->policy_nr_args = ca->policy_argc; in cache_create()
2440 cache->migration_threshold = DEFAULT_MIGRATION_THRESHOLD; in cache_create()
2442 r = set_config_values(cache, ca->policy_argc, ca->policy_argv); in cache_create()
2448 cmd = dm_cache_metadata_open(cache->metadata_dev->bdev, in cache_create()
2450 dm_cache_policy_get_hint_size(cache->policy), in cache_create()
2457 cache->cmd = cmd; in cache_create()
2458 set_cache_mode(cache, CM_WRITE); in cache_create()
2459 if (get_cache_mode(cache) != CM_WRITE) { in cache_create()
2465 if (passthrough_mode(cache)) { in cache_create()
2468 r = dm_cache_metadata_all_clean(cache->cmd, &all_clean); in cache_create()
2480 policy_allow_migrations(cache->policy, false); in cache_create()
2483 spin_lock_init(&cache->lock); in cache_create()
2484 bio_list_init(&cache->deferred_bios); in cache_create()
2485 atomic_set(&cache->nr_allocated_migrations, 0); in cache_create()
2486 atomic_set(&cache->nr_io_migrations, 0); in cache_create()
2487 init_waitqueue_head(&cache->migration_wait); in cache_create()
2490 atomic_set(&cache->nr_dirty, 0); in cache_create()
2491 cache->dirty_bitset = alloc_bitset(from_cblock(cache->cache_size)); in cache_create()
2492 if (!cache->dirty_bitset) { in cache_create()
2496 clear_bitset(cache->dirty_bitset, from_cblock(cache->cache_size)); in cache_create()
2498 cache->discard_block_size = in cache_create()
2499 calculate_discard_block_size(cache->sectors_per_block, in cache_create()
2500 cache->origin_sectors); in cache_create()
2501 cache->discard_nr_blocks = to_dblock(dm_sector_div_up(cache->origin_sectors, in cache_create()
2502 cache->discard_block_size)); in cache_create()
2503 cache->discard_bitset = alloc_bitset(from_dblock(cache->discard_nr_blocks)); in cache_create()
2504 if (!cache->discard_bitset) { in cache_create()
2508 clear_bitset(cache->discard_bitset, from_dblock(cache->discard_nr_blocks)); in cache_create()
2510 cache->copier = dm_kcopyd_client_create(&dm_kcopyd_throttle); in cache_create()
2511 if (IS_ERR(cache->copier)) { in cache_create()
2513 r = PTR_ERR(cache->copier); in cache_create()
2517 cache->wq = alloc_workqueue("dm-" DM_MSG_PREFIX, WQ_MEM_RECLAIM, 0); in cache_create()
2518 if (!cache->wq) { in cache_create()
2522 INIT_WORK(&cache->deferred_bio_worker, process_deferred_bios); in cache_create()
2523 INIT_WORK(&cache->migration_worker, check_migrations); in cache_create()
2524 INIT_DELAYED_WORK(&cache->waker, do_waker); in cache_create()
2526 cache->prison = dm_bio_prison_create_v2(cache->wq); in cache_create()
2527 if (!cache->prison) { in cache_create()
2532 r = mempool_init_slab_pool(&cache->migration_pool, MIGRATION_POOL_SIZE, in cache_create()
2539 cache->need_tick_bio = true; in cache_create()
2540 cache->sized = false; in cache_create()
2541 cache->invalidate = false; in cache_create()
2542 cache->commit_requested = false; in cache_create()
2543 cache->loaded_mappings = false; in cache_create()
2544 cache->loaded_discards = false; in cache_create()
2546 load_stats(cache); in cache_create()
2548 atomic_set(&cache->stats.demotion, 0); in cache_create()
2549 atomic_set(&cache->stats.promotion, 0); in cache_create()
2550 atomic_set(&cache->stats.copies_avoided, 0); in cache_create()
2551 atomic_set(&cache->stats.cache_cell_clash, 0); in cache_create()
2552 atomic_set(&cache->stats.commit_count, 0); in cache_create()
2553 atomic_set(&cache->stats.discard_count, 0); in cache_create()
2555 spin_lock_init(&cache->invalidation_lock); in cache_create()
2556 INIT_LIST_HEAD(&cache->invalidation_requests); in cache_create()
2558 batcher_init(&cache->committer, commit_op, cache, in cache_create()
2559 issue_op, cache, cache->wq); in cache_create()
2560 dm_iot_init(&cache->tracker); in cache_create()
2562 init_rwsem(&cache->background_work_lock); in cache_create()
2563 prevent_background_work(cache); in cache_create()
2565 *result = cache; in cache_create()
2568 destroy(cache); in cache_create()
2572 static int copy_ctr_args(struct cache *cache, int argc, const char **argv) in copy_ctr_args() argument
2590 cache->nr_ctr_args = argc; in copy_ctr_args()
2591 cache->ctr_args = copy; in copy_ctr_args()
2600 struct cache *cache = NULL; in cache_ctr() local
2613 r = cache_create(ca, &cache); in cache_ctr()
2617 r = copy_ctr_args(cache, argc - 3, (const char **)argv + 3); in cache_ctr()
2619 destroy(cache); in cache_ctr()
2623 ti->private = cache; in cache_ctr()
2633 struct cache *cache = ti->private; in cache_map() local
2637 dm_oblock_t block = get_bio_block(cache, bio); in cache_map()
2640 if (unlikely(from_oblock(block) >= from_oblock(cache->origin_blocks))) { in cache_map()
2646 remap_to_origin(cache, bio); in cache_map()
2647 accounted_begin(cache, bio); in cache_map()
2652 defer_bio(cache, bio); in cache_map()
2656 r = map_bio(cache, bio, block, &commit_needed); in cache_map()
2658 schedule_commit(&cache->committer); in cache_map()
2665 struct cache *cache = ti->private; in cache_end_io() local
2670 policy_tick(cache->policy, false); in cache_end_io()
2672 spin_lock_irqsave(&cache->lock, flags); in cache_end_io()
2673 cache->need_tick_bio = true; in cache_end_io()
2674 spin_unlock_irqrestore(&cache->lock, flags); in cache_end_io()
2677 bio_drop_shared_lock(cache, bio); in cache_end_io()
2678 accounted_complete(cache, bio); in cache_end_io()
2683 static int write_dirty_bitset(struct cache *cache) in write_dirty_bitset() argument
2687 if (get_cache_mode(cache) >= CM_READ_ONLY) in write_dirty_bitset()
2690 r = dm_cache_set_dirty_bits(cache->cmd, from_cblock(cache->cache_size), cache->dirty_bitset); in write_dirty_bitset()
2692 metadata_operation_failed(cache, "dm_cache_set_dirty_bits", r); in write_dirty_bitset()
2697 static int write_discard_bitset(struct cache *cache) in write_discard_bitset() argument
2701 if (get_cache_mode(cache) >= CM_READ_ONLY) in write_discard_bitset()
2704 r = dm_cache_discard_bitset_resize(cache->cmd, cache->discard_block_size, in write_discard_bitset()
2705 cache->discard_nr_blocks); in write_discard_bitset()
2707 DMERR("%s: could not resize on-disk discard bitset", cache_device_name(cache)); in write_discard_bitset()
2708 metadata_operation_failed(cache, "dm_cache_discard_bitset_resize", r); in write_discard_bitset()
2712 for (i = 0; i < from_dblock(cache->discard_nr_blocks); i++) { in write_discard_bitset()
2713 r = dm_cache_set_discard(cache->cmd, to_dblock(i), in write_discard_bitset()
2714 is_discarded(cache, to_dblock(i))); in write_discard_bitset()
2716 metadata_operation_failed(cache, "dm_cache_set_discard", r); in write_discard_bitset()
2724 static int write_hints(struct cache *cache) in write_hints() argument
2728 if (get_cache_mode(cache) >= CM_READ_ONLY) in write_hints()
2731 r = dm_cache_write_hints(cache->cmd, cache->policy); in write_hints()
2733 metadata_operation_failed(cache, "dm_cache_write_hints", r); in write_hints()
2743 static bool sync_metadata(struct cache *cache) in sync_metadata() argument
2747 r1 = write_dirty_bitset(cache); in sync_metadata()
2749 DMERR("%s: could not write dirty bitset", cache_device_name(cache)); in sync_metadata()
2751 r2 = write_discard_bitset(cache); in sync_metadata()
2753 DMERR("%s: could not write discard bitset", cache_device_name(cache)); in sync_metadata()
2755 save_stats(cache); in sync_metadata()
2757 r3 = write_hints(cache); in sync_metadata()
2759 DMERR("%s: could not write hints", cache_device_name(cache)); in sync_metadata()
2766 r4 = commit(cache, !r1 && !r2 && !r3); in sync_metadata()
2768 DMERR("%s: could not write cache metadata", cache_device_name(cache)); in sync_metadata()
2775 struct cache *cache = ti->private; in cache_postsuspend() local
2777 prevent_background_work(cache); in cache_postsuspend()
2778 BUG_ON(atomic_read(&cache->nr_io_migrations)); in cache_postsuspend()
2780 cancel_delayed_work_sync(&cache->waker); in cache_postsuspend()
2781 drain_workqueue(cache->wq); in cache_postsuspend()
2782 WARN_ON(cache->tracker.in_flight); in cache_postsuspend()
2788 requeue_deferred_bios(cache); in cache_postsuspend()
2790 if (get_cache_mode(cache) == CM_WRITE) in cache_postsuspend()
2791 (void) sync_metadata(cache); in cache_postsuspend()
2797 struct cache *cache = context; in load_mapping() local
2800 set_bit(from_cblock(cblock), cache->dirty_bitset); in load_mapping()
2801 atomic_inc(&cache->nr_dirty); in load_mapping()
2803 clear_bit(from_cblock(cblock), cache->dirty_bitset); in load_mapping()
2805 return policy_load_mapping(cache->policy, oblock, cblock, dirty, hint, hint_valid); in load_mapping()
2815 struct cache *cache; member
2825 static void discard_load_info_init(struct cache *cache, in discard_load_info_init() argument
2828 li->cache = cache; in discard_load_info_init()
2848 b = dm_sector_div_up(b, li->cache->discard_block_size); in set_discard_range()
2849 sector_div(e, li->cache->discard_block_size); in set_discard_range()
2855 if (e > from_dblock(li->cache->discard_nr_blocks)) in set_discard_range()
2856 e = from_dblock(li->cache->discard_nr_blocks); in set_discard_range()
2859 set_discard(li->cache, to_dblock(b)); in set_discard_range()
2892 static dm_cblock_t get_cache_dev_size(struct cache *cache) in get_cache_dev_size() argument
2894 sector_t size = get_dev_size(cache->cache_dev); in get_cache_dev_size()
2895 (void) sector_div(size, cache->sectors_per_block); in get_cache_dev_size()
2899 static bool can_resize(struct cache *cache, dm_cblock_t new_size) in can_resize() argument
2901 if (from_cblock(new_size) > from_cblock(cache->cache_size)) { in can_resize()
2902 if (cache->sized) { in can_resize()
2904 cache_device_name(cache)); in can_resize()
2912 while (from_cblock(new_size) < from_cblock(cache->cache_size)) { in can_resize()
2914 if (is_dirty(cache, new_size)) { in can_resize()
2916 cache_device_name(cache), in can_resize()
2925 static int resize_cache_dev(struct cache *cache, dm_cblock_t new_size) in resize_cache_dev() argument
2929 r = dm_cache_resize(cache->cmd, new_size); in resize_cache_dev()
2931 DMERR("%s: could not resize cache metadata", cache_device_name(cache)); in resize_cache_dev()
2932 metadata_operation_failed(cache, "dm_cache_resize", r); in resize_cache_dev()
2936 set_cache_size(cache, new_size); in resize_cache_dev()
2944 struct cache *cache = ti->private; in cache_preresume() local
2945 dm_cblock_t csize = get_cache_dev_size(cache); in cache_preresume()
2950 if (!cache->sized) { in cache_preresume()
2951 r = resize_cache_dev(cache, csize); in cache_preresume()
2955 cache->sized = true; in cache_preresume()
2957 } else if (csize != cache->cache_size) { in cache_preresume()
2958 if (!can_resize(cache, csize)) in cache_preresume()
2961 r = resize_cache_dev(cache, csize); in cache_preresume()
2966 if (!cache->loaded_mappings) { in cache_preresume()
2967 r = dm_cache_load_mappings(cache->cmd, cache->policy, in cache_preresume()
2968 load_mapping, cache); in cache_preresume()
2970 DMERR("%s: could not load cache mappings", cache_device_name(cache)); in cache_preresume()
2971 metadata_operation_failed(cache, "dm_cache_load_mappings", r); in cache_preresume()
2975 cache->loaded_mappings = true; in cache_preresume()
2978 if (!cache->loaded_discards) { in cache_preresume()
2986 clear_bitset(cache->discard_bitset, from_dblock(cache->discard_nr_blocks)); in cache_preresume()
2988 discard_load_info_init(cache, &li); in cache_preresume()
2989 r = dm_cache_load_discards(cache->cmd, load_discard, &li); in cache_preresume()
2991 DMERR("%s: could not load origin discards", cache_device_name(cache)); in cache_preresume()
2992 metadata_operation_failed(cache, "dm_cache_load_discards", r); in cache_preresume()
2997 cache->loaded_discards = true; in cache_preresume()
3005 struct cache *cache = ti->private; in cache_resume() local
3007 cache->need_tick_bio = true; in cache_resume()
3008 allow_background_work(cache); in cache_resume()
3009 do_waker(&cache->waker.work); in cache_resume()
3012 static void emit_flags(struct cache *cache, char *result, in emit_flags() argument
3016 struct cache_features *cf = &cache->features; in emit_flags()
3024 if (writethrough_mode(cache)) in emit_flags()
3027 else if (passthrough_mode(cache)) in emit_flags()
3030 else if (writeback_mode(cache)) in emit_flags()
3036 cache_device_name(cache), (int) cf->io_mode); in emit_flags()
3065 struct cache *cache = ti->private; in cache_status() local
3071 if (get_cache_mode(cache) == CM_FAIL) { in cache_status()
3078 (void) commit(cache, false); in cache_status()
3080 r = dm_cache_get_free_metadata_block_count(cache->cmd, &nr_free_blocks_metadata); in cache_status()
3083 cache_device_name(cache), r); in cache_status()
3087 r = dm_cache_get_metadata_dev_size(cache->cmd, &nr_blocks_metadata); in cache_status()
3090 cache_device_name(cache), r); in cache_status()
3094 residency = policy_residency(cache->policy); in cache_status()
3100 (unsigned long long)cache->sectors_per_block, in cache_status()
3102 (unsigned long long) from_cblock(cache->cache_size), in cache_status()
3103 (unsigned int) atomic_read(&cache->stats.read_hit), in cache_status()
3104 (unsigned int) atomic_read(&cache->stats.read_miss), in cache_status()
3105 (unsigned int) atomic_read(&cache->stats.write_hit), in cache_status()
3106 (unsigned int) atomic_read(&cache->stats.write_miss), in cache_status()
3107 (unsigned int) atomic_read(&cache->stats.demotion), in cache_status()
3108 (unsigned int) atomic_read(&cache->stats.promotion), in cache_status()
3109 (unsigned long) atomic_read(&cache->nr_dirty)); in cache_status()
3111 emit_flags(cache, result, maxlen, &sz); in cache_status()
3113 DMEMIT("2 migration_threshold %llu ", (unsigned long long) cache->migration_threshold); in cache_status()
3115 DMEMIT("%s ", dm_cache_policy_get_name(cache->policy)); in cache_status()
3117 r = policy_emit_config_values(cache->policy, result, maxlen, &sz); in cache_status()
3120 cache_device_name(cache), r); in cache_status()
3123 if (get_cache_mode(cache) == CM_READ_ONLY) in cache_status()
3128 r = dm_cache_metadata_needs_check(cache->cmd, &needs_check); in cache_status()
3138 format_dev_t(buf, cache->metadata_dev->bdev->bd_dev); in cache_status()
3140 format_dev_t(buf, cache->cache_dev->bdev->bd_dev); in cache_status()
3142 format_dev_t(buf, cache->origin_dev->bdev->bd_dev); in cache_status()
3145 for (i = 0; i < cache->nr_ctr_args - 1; i++) in cache_status()
3146 DMEMIT(" %s", cache->ctr_args[i]); in cache_status()
3147 if (cache->nr_ctr_args) in cache_status()
3148 DMEMIT(" %s", cache->ctr_args[cache->nr_ctr_args - 1]); in cache_status()
3153 if (get_cache_mode(cache) == CM_FAIL) in cache_status()
3155 else if (get_cache_mode(cache) == CM_READ_ONLY) in cache_status()
3160 format_dev_t(buf, cache->metadata_dev->bdev->bd_dev); in cache_status()
3162 format_dev_t(buf, cache->cache_dev->bdev->bd_dev); in cache_status()
3164 format_dev_t(buf, cache->origin_dev->bdev->bd_dev); in cache_status()
3166 DMEMIT(",writethrough=%c", writethrough_mode(cache) ? 'y' : 'n'); in cache_status()
3167 DMEMIT(",writeback=%c", writeback_mode(cache) ? 'y' : 'n'); in cache_status()
3168 DMEMIT(",passthrough=%c", passthrough_mode(cache) ? 'y' : 'n'); in cache_status()
3169 DMEMIT(",metadata2=%c", cache->features.metadata_version == 2 ? 'y' : 'n'); in cache_status()
3170 DMEMIT(",no_discard_passdown=%c", cache->features.discard_passdown ? 'n' : 'y'); in cache_status()
3196 static int parse_cblock_range(struct cache *cache, const char *str, in parse_cblock_range() argument
3229 DMERR("%s: invalid cblock range '%s'", cache_device_name(cache), str); in parse_cblock_range()
3233 static int validate_cblock_range(struct cache *cache, struct cblock_range *range) in validate_cblock_range() argument
3237 uint64_t n = from_cblock(cache->cache_size); in validate_cblock_range()
3241 cache_device_name(cache), b, n); in validate_cblock_range()
3247 cache_device_name(cache), e, n); in validate_cblock_range()
3253 cache_device_name(cache), b, e); in validate_cblock_range()
3265 static int request_invalidation(struct cache *cache, struct cblock_range *range) in request_invalidation() argument
3276 r = invalidate_cblock(cache, range->begin); in request_invalidation()
3283 cache->commit_requested = true; in request_invalidation()
3287 static int process_invalidate_cblocks_message(struct cache *cache, unsigned int count, in process_invalidate_cblocks_message() argument
3294 if (!passthrough_mode(cache)) { in process_invalidate_cblocks_message()
3296 cache_device_name(cache)); in process_invalidate_cblocks_message()
3301 r = parse_cblock_range(cache, cblock_ranges[i], &range); in process_invalidate_cblocks_message()
3305 r = validate_cblock_range(cache, &range); in process_invalidate_cblocks_message()
3312 r = request_invalidation(cache, &range); in process_invalidate_cblocks_message()
3331 struct cache *cache = ti->private; in cache_message() local
3336 if (get_cache_mode(cache) >= CM_READ_ONLY) { in cache_message()
3338 cache_device_name(cache)); in cache_message()
3343 return process_invalidate_cblocks_message(cache, argc - 1, (const char **) argv + 1); in cache_message()
3348 return set_config_value(cache, argv[0], argv[1]); in cache_message()
3355 struct cache *cache = ti->private; in cache_iterate_devices() local
3357 r = fn(ti, cache->cache_dev, 0, get_dev_size(cache->cache_dev), data); in cache_iterate_devices()
3359 r = fn(ti, cache->origin_dev, 0, ti->len, data); in cache_iterate_devices()
3368 static void disable_passdown_if_not_supported(struct cache *cache) in disable_passdown_if_not_supported() argument
3370 struct block_device *origin_bdev = cache->origin_dev->bdev; in disable_passdown_if_not_supported()
3374 if (!cache->features.discard_passdown) in disable_passdown_if_not_supported()
3380 else if (origin_limits->max_discard_sectors < cache->sectors_per_block) in disable_passdown_if_not_supported()
3386 cache->features.discard_passdown = false; in disable_passdown_if_not_supported()
3390 static void set_discard_limits(struct cache *cache, struct queue_limits *limits) in set_discard_limits() argument
3392 struct block_device *origin_bdev = cache->origin_dev->bdev; in set_discard_limits()
3395 if (!cache->features.discard_passdown) { in set_discard_limits()
3397 limits->max_discard_sectors = min_t(sector_t, cache->discard_block_size * 1024, in set_discard_limits()
3398 cache->origin_sectors); in set_discard_limits()
3399 limits->discard_granularity = cache->discard_block_size << SECTOR_SHIFT; in set_discard_limits()
3416 struct cache *cache = ti->private; in cache_io_hints() local
3423 if (io_opt_sectors < cache->sectors_per_block || in cache_io_hints()
3424 do_div(io_opt_sectors, cache->sectors_per_block)) { in cache_io_hints()
3425 blk_limits_io_min(limits, cache->sectors_per_block << SECTOR_SHIFT); in cache_io_hints()
3426 blk_limits_io_opt(limits, cache->sectors_per_block << SECTOR_SHIFT); in cache_io_hints()
3429 disable_passdown_if_not_supported(cache); in cache_io_hints()
3430 set_discard_limits(cache, limits); in cache_io_hints()