205 static int superblock_read_lock(struct dm_cache_metadata *cmd,  in superblock_read_lock()  argument
208 	return dm_bm_read_lock(cmd->bm, CACHE_SUPERBLOCK_LOCATION,  in superblock_read_lock()
212 static int superblock_lock_zero(struct dm_cache_metadata *cmd,  in superblock_lock_zero()  argument
215 	return dm_bm_write_lock_zero(cmd->bm, CACHE_SUPERBLOCK_LOCATION,  in superblock_lock_zero()
219 static int superblock_lock(struct dm_cache_metadata *cmd,  in superblock_lock()  argument
222 	return dm_bm_write_lock(cmd->bm, CACHE_SUPERBLOCK_LOCATION,  in superblock_lock()
255 static void __setup_mapping_info(struct dm_cache_metadata *cmd)  in __setup_mapping_info()  argument
264 	dm_array_info_init(&cmd->info, cmd->tm, &vt);  in __setup_mapping_info()
266 	if (cmd->policy_hint_size) {  in __setup_mapping_info()
268 		dm_array_info_init(&cmd->hint_info, cmd->tm, &vt);  in __setup_mapping_info()
272 static int __save_sm_root(struct dm_cache_metadata *cmd)  in __save_sm_root()  argument
277 	r = dm_sm_root_size(cmd->metadata_sm, &metadata_len);  in __save_sm_root()
281 	return dm_sm_copy_root(cmd->metadata_sm, &cmd->metadata_space_map_root,  in __save_sm_root()
285 static void __copy_sm_root(struct dm_cache_metadata *cmd,  in __copy_sm_root()  argument
289 	       &cmd->metadata_space_map_root,  in __copy_sm_root()
290 	       sizeof(cmd->metadata_space_map_root));  in __copy_sm_root()
293 static int __write_initial_superblock(struct dm_cache_metadata *cmd)  in __write_initial_superblock()  argument
298 	sector_t bdev_size = i_size_read(cmd->bdev->bd_inode) >> SECTOR_SHIFT;  in __write_initial_superblock()
304 	r = dm_tm_pre_commit(cmd->tm);  in __write_initial_superblock()
312 	r = __save_sm_root(cmd);  in __write_initial_superblock()
316 	r = superblock_lock_zero(cmd, &sblock);  in __write_initial_superblock()
329 	__copy_sm_root(cmd, disk_super);  in __write_initial_superblock()
331 	disk_super->mapping_root = cpu_to_le64(cmd->root);  in __write_initial_superblock()
332 	disk_super->hint_root = cpu_to_le64(cmd->hint_root);  in __write_initial_superblock()
333 	disk_super->discard_root = cpu_to_le64(cmd->discard_root);  in __write_initial_superblock()
334 	disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size);  in __write_initial_superblock()
335 	disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks));  in __write_initial_superblock()
337 	disk_super->data_block_size = cpu_to_le32(cmd->data_block_size);  in __write_initial_superblock()
345 	return dm_tm_commit(cmd->tm, sblock);  in __write_initial_superblock()
348 static int __format_metadata(struct dm_cache_metadata *cmd)  in __format_metadata()  argument
352 	r = dm_tm_create_with_sm(cmd->bm, CACHE_SUPERBLOCK_LOCATION,  in __format_metadata()
353 				 &cmd->tm, &cmd->metadata_sm);  in __format_metadata()
359 	__setup_mapping_info(cmd);  in __format_metadata()
361 	r = dm_array_empty(&cmd->info, &cmd->root);  in __format_metadata()
365 	dm_disk_bitset_init(cmd->tm, &cmd->discard_info);  in __format_metadata()
367 	r = dm_bitset_empty(&cmd->discard_info, &cmd->discard_root);  in __format_metadata()
371 	cmd->discard_block_size = 0;  in __format_metadata()
372 	cmd->discard_nr_blocks = 0;  in __format_metadata()
374 	r = __write_initial_superblock(cmd);  in __format_metadata()
378 	cmd->clean_when_opened = true;  in __format_metadata()
382 	dm_tm_destroy(cmd->tm);  in __format_metadata()
383 	dm_sm_destroy(cmd->metadata_sm);  in __format_metadata()
389 				     struct dm_cache_metadata *cmd)  in __check_incompat_features()  argument
403 	if (get_disk_ro(cmd->bdev->bd_disk))  in __check_incompat_features()
416 static int __open_metadata(struct dm_cache_metadata *cmd)  in __open_metadata()  argument
423 	r = superblock_read_lock(cmd, &sblock);  in __open_metadata()
432 	if (le32_to_cpu(disk_super->data_block_size) != cmd->data_block_size) {  in __open_metadata()
435 		      (unsigned long long)cmd->data_block_size);  in __open_metadata()
440 	r = __check_incompat_features(disk_super, cmd);  in __open_metadata()
444 	r = dm_tm_open_with_sm(cmd->bm, CACHE_SUPERBLOCK_LOCATION,  in __open_metadata()
447 			       &cmd->tm, &cmd->metadata_sm);  in __open_metadata()
453 	__setup_mapping_info(cmd);  in __open_metadata()
454 	dm_disk_bitset_init(cmd->tm, &cmd->discard_info);  in __open_metadata()
456 	cmd->clean_when_opened = test_bit(CLEAN_SHUTDOWN, &sb_flags);  in __open_metadata()
464 static int __open_or_format_metadata(struct dm_cache_metadata *cmd,  in __open_or_format_metadata()  argument
470 	r = __superblock_all_zeroes(cmd->bm, &unformatted);  in __open_or_format_metadata()
475 		return format_device ? __format_metadata(cmd) : -EPERM;  in __open_or_format_metadata()
477 	return __open_metadata(cmd);  in __open_or_format_metadata()
480 static int __create_persistent_data_objects(struct dm_cache_metadata *cmd,  in __create_persistent_data_objects()  argument
484 	cmd->bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE << SECTOR_SHIFT,  in __create_persistent_data_objects()
487 	if (IS_ERR(cmd->bm)) {  in __create_persistent_data_objects()
489 		return PTR_ERR(cmd->bm);  in __create_persistent_data_objects()
492 	r = __open_or_format_metadata(cmd, may_format_device);  in __create_persistent_data_objects()
494 		dm_block_manager_destroy(cmd->bm);  in __create_persistent_data_objects()
499 static void __destroy_persistent_data_objects(struct dm_cache_metadata *cmd)  in __destroy_persistent_data_objects()  argument
501 	dm_sm_destroy(cmd->metadata_sm);  in __destroy_persistent_data_objects()
502 	dm_tm_destroy(cmd->tm);  in __destroy_persistent_data_objects()
503 	dm_block_manager_destroy(cmd->bm);  in __destroy_persistent_data_objects()
527 static void read_superblock_fields(struct dm_cache_metadata *cmd,  in read_superblock_fields()  argument
530 	cmd->root = le64_to_cpu(disk_super->mapping_root);  in read_superblock_fields()
531 	cmd->hint_root = le64_to_cpu(disk_super->hint_root);  in read_superblock_fields()
532 	cmd->discard_root = le64_to_cpu(disk_super->discard_root);  in read_superblock_fields()
533 	cmd->discard_block_size = le64_to_cpu(disk_super->discard_block_size);  in read_superblock_fields()
534 	cmd->discard_nr_blocks = to_dblock(le64_to_cpu(disk_super->discard_nr_blocks));  in read_superblock_fields()
535 	cmd->data_block_size = le32_to_cpu(disk_super->data_block_size);  in read_superblock_fields()
536 	cmd->cache_blocks = to_cblock(le32_to_cpu(disk_super->cache_blocks));  in read_superblock_fields()
537 	strncpy(cmd->policy_name, disk_super->policy_name, sizeof(cmd->policy_name));  in read_superblock_fields()
538 	cmd->policy_version[0] = le32_to_cpu(disk_super->policy_version[0]);  in read_superblock_fields()
539 	cmd->policy_version[1] = le32_to_cpu(disk_super->policy_version[1]);  in read_superblock_fields()
540 	cmd->policy_version[2] = le32_to_cpu(disk_super->policy_version[2]);  in read_superblock_fields()
541 	cmd->policy_hint_size = le32_to_cpu(disk_super->policy_hint_size);  in read_superblock_fields()
543 	cmd->stats.read_hits = le32_to_cpu(disk_super->read_hits);  in read_superblock_fields()
544 	cmd->stats.read_misses = le32_to_cpu(disk_super->read_misses);  in read_superblock_fields()
545 	cmd->stats.write_hits = le32_to_cpu(disk_super->write_hits);  in read_superblock_fields()
546 	cmd->stats.write_misses = le32_to_cpu(disk_super->write_misses);  in read_superblock_fields()
548 	cmd->changed = false;  in read_superblock_fields()
554 static int __begin_transaction_flags(struct dm_cache_metadata *cmd,  in __begin_transaction_flags()  argument
561 	r = superblock_lock(cmd, &sblock);  in __begin_transaction_flags()
567 	read_superblock_fields(cmd, disk_super);  in __begin_transaction_flags()
570 	return dm_bm_flush(cmd->bm);  in __begin_transaction_flags()
573 static int __begin_transaction(struct dm_cache_metadata *cmd)  in __begin_transaction()  argument
583 	r = superblock_read_lock(cmd, &sblock);  in __begin_transaction()
588 	read_superblock_fields(cmd, disk_super);  in __begin_transaction()
594 static int __commit_transaction(struct dm_cache_metadata *cmd,  in __commit_transaction()  argument
606 	r = dm_bitset_flush(&cmd->discard_info, cmd->discard_root,  in __commit_transaction()
607 			    &cmd->discard_root);  in __commit_transaction()
611 	r = dm_tm_pre_commit(cmd->tm);  in __commit_transaction()
615 	r = __save_sm_root(cmd);  in __commit_transaction()
619 	r = superblock_lock(cmd, &sblock);  in __commit_transaction()
628 	disk_super->mapping_root = cpu_to_le64(cmd->root);  in __commit_transaction()
629 	disk_super->hint_root = cpu_to_le64(cmd->hint_root);  in __commit_transaction()
630 	disk_super->discard_root = cpu_to_le64(cmd->discard_root);  in __commit_transaction()
631 	disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size);  in __commit_transaction()
632 	disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks));  in __commit_transaction()
633 	disk_super->cache_blocks = cpu_to_le32(from_cblock(cmd->cache_blocks));  in __commit_transaction()
634 	strncpy(disk_super->policy_name, cmd->policy_name, sizeof(disk_super->policy_name));  in __commit_transaction()
635 	disk_super->policy_version[0] = cpu_to_le32(cmd->policy_version[0]);  in __commit_transaction()
636 	disk_super->policy_version[1] = cpu_to_le32(cmd->policy_version[1]);  in __commit_transaction()
637 	disk_super->policy_version[2] = cpu_to_le32(cmd->policy_version[2]);  in __commit_transaction()
639 	disk_super->read_hits = cpu_to_le32(cmd->stats.read_hits);  in __commit_transaction()
640 	disk_super->read_misses = cpu_to_le32(cmd->stats.read_misses);  in __commit_transaction()
641 	disk_super->write_hits = cpu_to_le32(cmd->stats.write_hits);  in __commit_transaction()
642 	disk_super->write_misses = cpu_to_le32(cmd->stats.write_misses);  in __commit_transaction()
643 	__copy_sm_root(cmd, disk_super);  in __commit_transaction()
645 	return dm_tm_commit(cmd->tm, sblock);  in __commit_transaction()
681 	struct dm_cache_metadata *cmd;  in metadata_open()  local
683 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);  in metadata_open()
684 	if (!cmd) {  in metadata_open()
689 	atomic_set(&cmd->ref_count, 1);  in metadata_open()
690 	init_rwsem(&cmd->root_lock);  in metadata_open()
691 	cmd->bdev = bdev;  in metadata_open()
692 	cmd->data_block_size = data_block_size;  in metadata_open()
693 	cmd->cache_blocks = 0;  in metadata_open()
694 	cmd->policy_hint_size = policy_hint_size;  in metadata_open()
695 	cmd->changed = true;  in metadata_open()
697 	r = __create_persistent_data_objects(cmd, may_format_device);  in metadata_open()
699 		kfree(cmd);  in metadata_open()
703 	r = __begin_transaction_flags(cmd, clear_clean_shutdown);  in metadata_open()
705 		dm_cache_metadata_close(cmd);  in metadata_open()
709 	return cmd;  in metadata_open()
722 	struct dm_cache_metadata *cmd;  in lookup()  local
724 	list_for_each_entry(cmd, &table, list)  in lookup()
725 		if (cmd->bdev == bdev) {  in lookup()
726 			atomic_inc(&cmd->ref_count);  in lookup()
727 			return cmd;  in lookup()
738 	struct dm_cache_metadata *cmd, *cmd2;  in lookup_or_open()  local
741 	cmd = lookup(bdev);  in lookup_or_open()
744 	if (cmd)  in lookup_or_open()
745 		return cmd;  in lookup_or_open()
747 	cmd = metadata_open(bdev, data_block_size, may_format_device, policy_hint_size);  in lookup_or_open()
748 	if (!IS_ERR(cmd)) {  in lookup_or_open()
753 			__destroy_persistent_data_objects(cmd);  in lookup_or_open()
754 			kfree(cmd);  in lookup_or_open()
757 		list_add(&cmd->list, &table);  in lookup_or_open()
761 	return cmd;  in lookup_or_open()
764 static bool same_params(struct dm_cache_metadata *cmd, sector_t data_block_size)  in same_params()  argument
766 	if (cmd->data_block_size != data_block_size) {  in same_params()
769 		      (unsigned long long) cmd->data_block_size);  in same_params()
781 	struct dm_cache_metadata *cmd = lookup_or_open(bdev, data_block_size,  in dm_cache_metadata_open()  local
784 	if (!IS_ERR(cmd) && !same_params(cmd, data_block_size)) {  in dm_cache_metadata_open()
785 		dm_cache_metadata_close(cmd);  in dm_cache_metadata_open()
789 	return cmd;  in dm_cache_metadata_open()
792 void dm_cache_metadata_close(struct dm_cache_metadata *cmd)  in dm_cache_metadata_close()  argument
794 	if (atomic_dec_and_test(&cmd->ref_count)) {  in dm_cache_metadata_close()
796 		list_del(&cmd->list);  in dm_cache_metadata_close()
799 		__destroy_persistent_data_objects(cmd);  in dm_cache_metadata_close()
800 		kfree(cmd);  in dm_cache_metadata_close()
807 static int block_unmapped_or_clean(struct dm_cache_metadata *cmd, dm_cblock_t b,  in block_unmapped_or_clean()  argument
815 	r = dm_array_get_value(&cmd->info, cmd->root, from_cblock(b), &value);  in block_unmapped_or_clean()
827 static int blocks_are_unmapped_or_clean(struct dm_cache_metadata *cmd,  in blocks_are_unmapped_or_clean()  argument
835 		r = block_unmapped_or_clean(cmd, begin, result);  in blocks_are_unmapped_or_clean()
851 int dm_cache_resize(struct dm_cache_metadata *cmd, dm_cblock_t new_cache_size)  in dm_cache_resize()  argument
857 	down_write(&cmd->root_lock);  in dm_cache_resize()
860 	if (from_cblock(new_cache_size) < from_cblock(cmd->cache_blocks)) {  in dm_cache_resize()
861 		r = blocks_are_unmapped_or_clean(cmd, new_cache_size, cmd->cache_blocks, &clean);  in dm_cache_resize()
875 	r = dm_array_resize(&cmd->info, cmd->root, from_cblock(cmd->cache_blocks),  in dm_cache_resize()
877 			    &null_mapping, &cmd->root);  in dm_cache_resize()
879 		cmd->cache_blocks = new_cache_size;  in dm_cache_resize()
880 	cmd->changed = true;  in dm_cache_resize()
883 	up_write(&cmd->root_lock);  in dm_cache_resize()
888 int dm_cache_discard_bitset_resize(struct dm_cache_metadata *cmd,  in dm_cache_discard_bitset_resize()  argument
894 	down_write(&cmd->root_lock);  in dm_cache_discard_bitset_resize()
895 	r = dm_bitset_resize(&cmd->discard_info,  in dm_cache_discard_bitset_resize()
896 			     cmd->discard_root,  in dm_cache_discard_bitset_resize()
897 			     from_dblock(cmd->discard_nr_blocks),  in dm_cache_discard_bitset_resize()
899 			     false, &cmd->discard_root);  in dm_cache_discard_bitset_resize()
901 		cmd->discard_block_size = discard_block_size;  in dm_cache_discard_bitset_resize()
902 		cmd->discard_nr_blocks = new_nr_entries;  in dm_cache_discard_bitset_resize()
905 	cmd->changed = true;  in dm_cache_discard_bitset_resize()
906 	up_write(&cmd->root_lock);  in dm_cache_discard_bitset_resize()
911 static int __set_discard(struct dm_cache_metadata *cmd, dm_dblock_t b)  in __set_discard()  argument
913 	return dm_bitset_set_bit(&cmd->discard_info, cmd->discard_root,  in __set_discard()
914 				 from_dblock(b), &cmd->discard_root);  in __set_discard()
917 static int __clear_discard(struct dm_cache_metadata *cmd, dm_dblock_t b)  in __clear_discard()  argument
919 	return dm_bitset_clear_bit(&cmd->discard_info, cmd->discard_root,  in __clear_discard()
920 				   from_dblock(b), &cmd->discard_root);  in __clear_discard()
923 static int __is_discarded(struct dm_cache_metadata *cmd, dm_dblock_t b,  in __is_discarded()  argument
926 	return dm_bitset_test_bit(&cmd->discard_info, cmd->discard_root,  in __is_discarded()
927 				  from_dblock(b), &cmd->discard_root,  in __is_discarded()
931 static int __discard(struct dm_cache_metadata *cmd,  in __discard()  argument
936 	r = (discard ? __set_discard : __clear_discard)(cmd, dblock);  in __discard()
940 	cmd->changed = true;  in __discard()
944 int dm_cache_set_discard(struct dm_cache_metadata *cmd,  in dm_cache_set_discard()  argument
949 	down_write(&cmd->root_lock);  in dm_cache_set_discard()
950 	r = __discard(cmd, dblock, discard);  in dm_cache_set_discard()
951 	up_write(&cmd->root_lock);  in dm_cache_set_discard()
956 static int __load_discards(struct dm_cache_metadata *cmd,  in __load_discards()  argument
963 	for (b = 0; b < from_dblock(cmd->discard_nr_blocks); b++) {  in __load_discards()
966 		if (cmd->clean_when_opened) {  in __load_discards()
967 			r = __is_discarded(cmd, dblock, &discard);  in __load_discards()
973 		r = fn(context, cmd->discard_block_size, dblock, discard);  in __load_discards()
981 int dm_cache_load_discards(struct dm_cache_metadata *cmd,  in dm_cache_load_discards()  argument
986 	down_read(&cmd->root_lock);  in dm_cache_load_discards()
987 	r = __load_discards(cmd, fn, context);  in dm_cache_load_discards()
988 	up_read(&cmd->root_lock);  in dm_cache_load_discards()
993 dm_cblock_t dm_cache_size(struct dm_cache_metadata *cmd)  in dm_cache_size()  argument
997 	down_read(&cmd->root_lock);  in dm_cache_size()
998 	r = cmd->cache_blocks;  in dm_cache_size()
999 	up_read(&cmd->root_lock);  in dm_cache_size()
1004 static int __remove(struct dm_cache_metadata *cmd, dm_cblock_t cblock)  in __remove()  argument
1010 	r = dm_array_set_value(&cmd->info, cmd->root, from_cblock(cblock),  in __remove()
1011 			       &value, &cmd->root);  in __remove()
1015 	cmd->changed = true;  in __remove()
1019 int dm_cache_remove_mapping(struct dm_cache_metadata *cmd, dm_cblock_t cblock)  in dm_cache_remove_mapping()  argument
1023 	down_write(&cmd->root_lock);  in dm_cache_remove_mapping()
1024 	r = __remove(cmd, cblock);  in dm_cache_remove_mapping()
1025 	up_write(&cmd->root_lock);  in dm_cache_remove_mapping()
1030 static int __insert(struct dm_cache_metadata *cmd,  in __insert()  argument
1037 	r = dm_array_set_value(&cmd->info, cmd->root, from_cblock(cblock),  in __insert()
1038 			       &value, &cmd->root);  in __insert()
1042 	cmd->changed = true;  in __insert()
1046 int dm_cache_insert_mapping(struct dm_cache_metadata *cmd,  in dm_cache_insert_mapping()  argument
1051 	down_write(&cmd->root_lock);  in dm_cache_insert_mapping()
1052 	r = __insert(cmd, cblock, oblock);  in dm_cache_insert_mapping()
1053 	up_write(&cmd->root_lock);  in dm_cache_insert_mapping()
1062 	struct dm_cache_metadata *cmd;  member
1067 static bool policy_unchanged(struct dm_cache_metadata *cmd,  in policy_unchanged()  argument
1077 	if (strncmp(cmd->policy_name, policy_name, sizeof(cmd->policy_name)))  in policy_unchanged()
1083 	if (cmd->policy_version[0] != policy_version[0])  in policy_unchanged()
1089 	if (cmd->policy_hint_size != policy_hint_size)  in policy_unchanged()
1095 static bool hints_array_initialized(struct dm_cache_metadata *cmd)  in hints_array_initialized()  argument
1097 	return cmd->hint_root && cmd->policy_hint_size;  in hints_array_initialized()
1100 static bool hints_array_available(struct dm_cache_metadata *cmd,  in hints_array_available()  argument
1103 	return cmd->clean_when_opened && policy_unchanged(cmd, policy) &&  in hints_array_available()
1104 		hints_array_initialized(cmd);  in hints_array_available()
1116 	struct dm_cache_metadata *cmd = thunk->cmd;  in __load_mapping()  local
1123 			r = dm_array_get_value(&cmd->hint_info, cmd->hint_root,  in __load_mapping()
1137 static int __load_mappings(struct dm_cache_metadata *cmd,  in __load_mappings()  argument
1146 	thunk.cmd = cmd;  in __load_mappings()
1147 	thunk.respect_dirty_flags = cmd->clean_when_opened;  in __load_mappings()
1148 	thunk.hints_valid = hints_array_available(cmd, policy);  in __load_mappings()
1150 	return dm_array_walk(&cmd->info, cmd->root, __load_mapping, &thunk);  in __load_mappings()
1153 int dm_cache_load_mappings(struct dm_cache_metadata *cmd,  in dm_cache_load_mappings()  argument
1159 	down_read(&cmd->root_lock);  in dm_cache_load_mappings()
1160 	r = __load_mappings(cmd, policy, fn, context);  in dm_cache_load_mappings()
1161 	up_read(&cmd->root_lock);  in dm_cache_load_mappings()
1179 static int __dump_mappings(struct dm_cache_metadata *cmd)  in __dump_mappings()  argument
1181 	return dm_array_walk(&cmd->info, cmd->root, __dump_mapping, NULL);  in __dump_mappings()
1184 void dm_cache_dump(struct dm_cache_metadata *cmd)  in dm_cache_dump()  argument
1186 	down_read(&cmd->root_lock);  in dm_cache_dump()
1187 	__dump_mappings(cmd);  in dm_cache_dump()
1188 	up_read(&cmd->root_lock);  in dm_cache_dump()
1191 int dm_cache_changed_this_transaction(struct dm_cache_metadata *cmd)  in dm_cache_changed_this_transaction()  argument
1195 	down_read(&cmd->root_lock);  in dm_cache_changed_this_transaction()
1196 	r = cmd->changed;  in dm_cache_changed_this_transaction()
1197 	up_read(&cmd->root_lock);  in dm_cache_changed_this_transaction()
1202 static int __dirty(struct dm_cache_metadata *cmd, dm_cblock_t cblock, bool dirty)  in __dirty()  argument
1209 	r = dm_array_get_value(&cmd->info, cmd->root, from_cblock(cblock), &value);  in __dirty()
1222 	r = dm_array_set_value(&cmd->info, cmd->root, from_cblock(cblock),  in __dirty()
1223 			       &value, &cmd->root);  in __dirty()
1227 	cmd->changed = true;  in __dirty()
1232 int dm_cache_set_dirty(struct dm_cache_metadata *cmd,  in dm_cache_set_dirty()  argument
1237 	down_write(&cmd->root_lock);  in dm_cache_set_dirty()
1238 	r = __dirty(cmd, cblock, dirty);  in dm_cache_set_dirty()
1239 	up_write(&cmd->root_lock);  in dm_cache_set_dirty()
1244 void dm_cache_metadata_get_stats(struct dm_cache_metadata *cmd,  in dm_cache_metadata_get_stats()  argument
1247 	down_read(&cmd->root_lock);  in dm_cache_metadata_get_stats()
1248 	*stats = cmd->stats;  in dm_cache_metadata_get_stats()
1249 	up_read(&cmd->root_lock);  in dm_cache_metadata_get_stats()
1252 void dm_cache_metadata_set_stats(struct dm_cache_metadata *cmd,  in dm_cache_metadata_set_stats()  argument
1255 	down_write(&cmd->root_lock);  in dm_cache_metadata_set_stats()
1256 	cmd->stats = *stats;  in dm_cache_metadata_set_stats()
1257 	up_write(&cmd->root_lock);  in dm_cache_metadata_set_stats()
1260 int dm_cache_commit(struct dm_cache_metadata *cmd, bool clean_shutdown)  in dm_cache_commit()  argument
1266 	down_write(&cmd->root_lock);  in dm_cache_commit()
1267 	r = __commit_transaction(cmd, mutator);  in dm_cache_commit()
1271 	r = __begin_transaction(cmd);  in dm_cache_commit()
1274 	up_write(&cmd->root_lock);  in dm_cache_commit()
1278 int dm_cache_get_free_metadata_block_count(struct dm_cache_metadata *cmd,  in dm_cache_get_free_metadata_block_count()  argument
1283 	down_read(&cmd->root_lock);  in dm_cache_get_free_metadata_block_count()
1284 	r = dm_sm_get_nr_free(cmd->metadata_sm, result);  in dm_cache_get_free_metadata_block_count()
1285 	up_read(&cmd->root_lock);  in dm_cache_get_free_metadata_block_count()
1290 int dm_cache_get_metadata_dev_size(struct dm_cache_metadata *cmd,  in dm_cache_get_metadata_dev_size()  argument
1295 	down_read(&cmd->root_lock);  in dm_cache_get_metadata_dev_size()
1296 	r = dm_sm_get_nr_blocks(cmd->metadata_sm, result);  in dm_cache_get_metadata_dev_size()
1297 	up_read(&cmd->root_lock);  in dm_cache_get_metadata_dev_size()
1304 static int begin_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *policy)  in begin_hints()  argument
1313 	    (strlen(policy_name) > sizeof(cmd->policy_name) - 1))  in begin_hints()
1316 	if (!policy_unchanged(cmd, policy)) {  in begin_hints()
1317 		strncpy(cmd->policy_name, policy_name, sizeof(cmd->policy_name));  in begin_hints()
1318 		memcpy(cmd->policy_version, policy_version, sizeof(cmd->policy_version));  in begin_hints()
1323 		cmd->policy_hint_size = hint_size;  in begin_hints()
1325 		if (cmd->hint_root) {  in begin_hints()
1326 			r = dm_array_del(&cmd->hint_info, cmd->hint_root);  in begin_hints()
1331 		r = dm_array_empty(&cmd->hint_info, &cmd->hint_root);  in begin_hints()
1337 		r = dm_array_resize(&cmd->hint_info, cmd->hint_root, 0,  in begin_hints()
1338 				    from_cblock(cmd->cache_blocks),  in begin_hints()
1339 				    &value, &cmd->hint_root);  in begin_hints()
1349 	struct dm_cache_metadata *cmd = context;  in save_hint()  local
1355 	r = dm_array_set_value(&cmd->hint_info, cmd->hint_root,  in save_hint()
1356 			       from_cblock(cblock), &value, &cmd->hint_root);  in save_hint()
1357 	cmd->changed = true;  in save_hint()
1362 static int write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *policy)  in write_hints()  argument
1366 	r = begin_hints(cmd, policy);  in write_hints()
1372 	return policy_walk_mappings(policy, save_hint, cmd);  in write_hints()
1375 int dm_cache_write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *policy)  in dm_cache_write_hints()  argument
1379 	down_write(&cmd->root_lock);  in dm_cache_write_hints()
1380 	r = write_hints(cmd, policy);  in dm_cache_write_hints()
1381 	up_write(&cmd->root_lock);  in dm_cache_write_hints()
1386 int dm_cache_metadata_all_clean(struct dm_cache_metadata *cmd, bool *result)  in dm_cache_metadata_all_clean()  argument
1388 	return blocks_are_unmapped_or_clean(cmd, 0, cmd->cache_blocks, result);  in dm_cache_metadata_all_clean()