Lines Matching refs:cmd
237 static int superblock_read_lock(struct dm_cache_metadata *cmd, in superblock_read_lock() argument
240 return dm_bm_read_lock(cmd->bm, CACHE_SUPERBLOCK_LOCATION, in superblock_read_lock()
244 static int superblock_lock_zero(struct dm_cache_metadata *cmd, in superblock_lock_zero() argument
247 return dm_bm_write_lock_zero(cmd->bm, CACHE_SUPERBLOCK_LOCATION, in superblock_lock_zero()
251 static int superblock_lock(struct dm_cache_metadata *cmd, in superblock_lock() argument
254 return dm_bm_write_lock(cmd->bm, CACHE_SUPERBLOCK_LOCATION, in superblock_lock()
289 static void __setup_mapping_info(struct dm_cache_metadata *cmd) in __setup_mapping_info() argument
298 dm_array_info_init(&cmd->info, cmd->tm, &vt); in __setup_mapping_info()
300 if (cmd->policy_hint_size) { in __setup_mapping_info()
302 dm_array_info_init(&cmd->hint_info, cmd->tm, &vt); in __setup_mapping_info()
306 static int __save_sm_root(struct dm_cache_metadata *cmd) in __save_sm_root() argument
311 r = dm_sm_root_size(cmd->metadata_sm, &metadata_len); in __save_sm_root()
315 return dm_sm_copy_root(cmd->metadata_sm, &cmd->metadata_space_map_root, in __save_sm_root()
319 static void __copy_sm_root(struct dm_cache_metadata *cmd, in __copy_sm_root() argument
323 &cmd->metadata_space_map_root, in __copy_sm_root()
324 sizeof(cmd->metadata_space_map_root)); in __copy_sm_root()
327 static bool separate_dirty_bits(struct dm_cache_metadata *cmd) in separate_dirty_bits() argument
329 return cmd->version >= 2; in separate_dirty_bits()
332 static int __write_initial_superblock(struct dm_cache_metadata *cmd) in __write_initial_superblock() argument
337 sector_t bdev_size = i_size_read(cmd->bdev->bd_inode) >> SECTOR_SHIFT; in __write_initial_superblock()
343 r = dm_tm_pre_commit(cmd->tm); in __write_initial_superblock()
351 r = __save_sm_root(cmd); in __write_initial_superblock()
355 r = superblock_lock_zero(cmd, &sblock); in __write_initial_superblock()
363 disk_super->version = cpu_to_le32(cmd->version); in __write_initial_superblock()
368 __copy_sm_root(cmd, disk_super); in __write_initial_superblock()
370 disk_super->mapping_root = cpu_to_le64(cmd->root); in __write_initial_superblock()
371 disk_super->hint_root = cpu_to_le64(cmd->hint_root); in __write_initial_superblock()
372 disk_super->discard_root = cpu_to_le64(cmd->discard_root); in __write_initial_superblock()
373 disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size); in __write_initial_superblock()
374 disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks)); in __write_initial_superblock()
376 disk_super->data_block_size = cpu_to_le32(cmd->data_block_size); in __write_initial_superblock()
384 if (separate_dirty_bits(cmd)) in __write_initial_superblock()
385 disk_super->dirty_root = cpu_to_le64(cmd->dirty_root); in __write_initial_superblock()
387 return dm_tm_commit(cmd->tm, sblock); in __write_initial_superblock()
390 static int __format_metadata(struct dm_cache_metadata *cmd) in __format_metadata() argument
394 r = dm_tm_create_with_sm(cmd->bm, CACHE_SUPERBLOCK_LOCATION, in __format_metadata()
395 &cmd->tm, &cmd->metadata_sm); in __format_metadata()
401 __setup_mapping_info(cmd); in __format_metadata()
403 r = dm_array_empty(&cmd->info, &cmd->root); in __format_metadata()
407 if (separate_dirty_bits(cmd)) { in __format_metadata()
408 dm_disk_bitset_init(cmd->tm, &cmd->dirty_info); in __format_metadata()
409 r = dm_bitset_empty(&cmd->dirty_info, &cmd->dirty_root); in __format_metadata()
414 dm_disk_bitset_init(cmd->tm, &cmd->discard_info); in __format_metadata()
415 r = dm_bitset_empty(&cmd->discard_info, &cmd->discard_root); in __format_metadata()
419 cmd->discard_block_size = 0; in __format_metadata()
420 cmd->discard_nr_blocks = 0; in __format_metadata()
422 r = __write_initial_superblock(cmd); in __format_metadata()
426 cmd->clean_when_opened = true; in __format_metadata()
430 dm_tm_destroy(cmd->tm); in __format_metadata()
431 dm_sm_destroy(cmd->metadata_sm); in __format_metadata()
437 struct dm_cache_metadata *cmd) in __check_incompat_features() argument
452 if (bdev_read_only(cmd->bdev)) in __check_incompat_features()
465 static int __open_metadata(struct dm_cache_metadata *cmd) in __open_metadata() argument
472 r = superblock_read_lock(cmd, &sblock); in __open_metadata()
481 if (le32_to_cpu(disk_super->data_block_size) != cmd->data_block_size) { in __open_metadata()
484 (unsigned long long)cmd->data_block_size); in __open_metadata()
489 r = __check_incompat_features(disk_super, cmd); in __open_metadata()
493 r = dm_tm_open_with_sm(cmd->bm, CACHE_SUPERBLOCK_LOCATION, in __open_metadata()
496 &cmd->tm, &cmd->metadata_sm); in __open_metadata()
502 __setup_mapping_info(cmd); in __open_metadata()
503 dm_disk_bitset_init(cmd->tm, &cmd->dirty_info); in __open_metadata()
504 dm_disk_bitset_init(cmd->tm, &cmd->discard_info); in __open_metadata()
506 cmd->clean_when_opened = test_bit(CLEAN_SHUTDOWN, &sb_flags); in __open_metadata()
516 static int __open_or_format_metadata(struct dm_cache_metadata *cmd, in __open_or_format_metadata() argument
522 r = __superblock_all_zeroes(cmd->bm, &unformatted); in __open_or_format_metadata()
527 return format_device ? __format_metadata(cmd) : -EPERM; in __open_or_format_metadata()
529 return __open_metadata(cmd); in __open_or_format_metadata()
532 static int __create_persistent_data_objects(struct dm_cache_metadata *cmd, in __create_persistent_data_objects() argument
536 cmd->bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE << SECTOR_SHIFT, in __create_persistent_data_objects()
538 if (IS_ERR(cmd->bm)) { in __create_persistent_data_objects()
540 r = PTR_ERR(cmd->bm); in __create_persistent_data_objects()
541 cmd->bm = NULL; in __create_persistent_data_objects()
545 r = __open_or_format_metadata(cmd, may_format_device); in __create_persistent_data_objects()
547 dm_block_manager_destroy(cmd->bm); in __create_persistent_data_objects()
548 cmd->bm = NULL; in __create_persistent_data_objects()
554 static void __destroy_persistent_data_objects(struct dm_cache_metadata *cmd) in __destroy_persistent_data_objects() argument
556 dm_sm_destroy(cmd->metadata_sm); in __destroy_persistent_data_objects()
557 dm_tm_destroy(cmd->tm); in __destroy_persistent_data_objects()
558 dm_block_manager_destroy(cmd->bm); in __destroy_persistent_data_objects()
582 static void read_superblock_fields(struct dm_cache_metadata *cmd, in read_superblock_fields() argument
585 cmd->version = le32_to_cpu(disk_super->version); in read_superblock_fields()
586 cmd->flags = le32_to_cpu(disk_super->flags); in read_superblock_fields()
587 cmd->root = le64_to_cpu(disk_super->mapping_root); in read_superblock_fields()
588 cmd->hint_root = le64_to_cpu(disk_super->hint_root); in read_superblock_fields()
589 cmd->discard_root = le64_to_cpu(disk_super->discard_root); in read_superblock_fields()
590 cmd->discard_block_size = le64_to_cpu(disk_super->discard_block_size); in read_superblock_fields()
591 cmd->discard_nr_blocks = to_dblock(le64_to_cpu(disk_super->discard_nr_blocks)); in read_superblock_fields()
592 cmd->data_block_size = le32_to_cpu(disk_super->data_block_size); in read_superblock_fields()
593 cmd->cache_blocks = to_cblock(le32_to_cpu(disk_super->cache_blocks)); in read_superblock_fields()
594 strncpy(cmd->policy_name, disk_super->policy_name, sizeof(cmd->policy_name)); in read_superblock_fields()
595 cmd->policy_version[0] = le32_to_cpu(disk_super->policy_version[0]); in read_superblock_fields()
596 cmd->policy_version[1] = le32_to_cpu(disk_super->policy_version[1]); in read_superblock_fields()
597 cmd->policy_version[2] = le32_to_cpu(disk_super->policy_version[2]); in read_superblock_fields()
598 cmd->policy_hint_size = le32_to_cpu(disk_super->policy_hint_size); in read_superblock_fields()
600 cmd->stats.read_hits = le32_to_cpu(disk_super->read_hits); in read_superblock_fields()
601 cmd->stats.read_misses = le32_to_cpu(disk_super->read_misses); in read_superblock_fields()
602 cmd->stats.write_hits = le32_to_cpu(disk_super->write_hits); in read_superblock_fields()
603 cmd->stats.write_misses = le32_to_cpu(disk_super->write_misses); in read_superblock_fields()
605 if (separate_dirty_bits(cmd)) in read_superblock_fields()
606 cmd->dirty_root = le64_to_cpu(disk_super->dirty_root); in read_superblock_fields()
608 cmd->changed = false; in read_superblock_fields()
614 static int __begin_transaction_flags(struct dm_cache_metadata *cmd, in __begin_transaction_flags() argument
621 r = superblock_lock(cmd, &sblock); in __begin_transaction_flags()
627 read_superblock_fields(cmd, disk_super); in __begin_transaction_flags()
630 return dm_bm_flush(cmd->bm); in __begin_transaction_flags()
633 static int __begin_transaction(struct dm_cache_metadata *cmd) in __begin_transaction() argument
643 r = superblock_read_lock(cmd, &sblock); in __begin_transaction()
648 read_superblock_fields(cmd, disk_super); in __begin_transaction()
654 static int __commit_transaction(struct dm_cache_metadata *cmd, in __commit_transaction() argument
666 if (separate_dirty_bits(cmd)) { in __commit_transaction()
667 r = dm_bitset_flush(&cmd->dirty_info, cmd->dirty_root, in __commit_transaction()
668 &cmd->dirty_root); in __commit_transaction()
673 r = dm_bitset_flush(&cmd->discard_info, cmd->discard_root, in __commit_transaction()
674 &cmd->discard_root); in __commit_transaction()
678 r = dm_tm_pre_commit(cmd->tm); in __commit_transaction()
682 r = __save_sm_root(cmd); in __commit_transaction()
686 r = superblock_lock(cmd, &sblock); in __commit_transaction()
692 disk_super->flags = cpu_to_le32(cmd->flags); in __commit_transaction()
696 disk_super->mapping_root = cpu_to_le64(cmd->root); in __commit_transaction()
697 if (separate_dirty_bits(cmd)) in __commit_transaction()
698 disk_super->dirty_root = cpu_to_le64(cmd->dirty_root); in __commit_transaction()
699 disk_super->hint_root = cpu_to_le64(cmd->hint_root); in __commit_transaction()
700 disk_super->discard_root = cpu_to_le64(cmd->discard_root); in __commit_transaction()
701 disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size); in __commit_transaction()
702 disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks)); in __commit_transaction()
703 disk_super->cache_blocks = cpu_to_le32(from_cblock(cmd->cache_blocks)); in __commit_transaction()
704 strncpy(disk_super->policy_name, cmd->policy_name, sizeof(disk_super->policy_name)); in __commit_transaction()
705 disk_super->policy_version[0] = cpu_to_le32(cmd->policy_version[0]); in __commit_transaction()
706 disk_super->policy_version[1] = cpu_to_le32(cmd->policy_version[1]); in __commit_transaction()
707 disk_super->policy_version[2] = cpu_to_le32(cmd->policy_version[2]); in __commit_transaction()
708 disk_super->policy_hint_size = cpu_to_le32(cmd->policy_hint_size); in __commit_transaction()
710 disk_super->read_hits = cpu_to_le32(cmd->stats.read_hits); in __commit_transaction()
711 disk_super->read_misses = cpu_to_le32(cmd->stats.read_misses); in __commit_transaction()
712 disk_super->write_hits = cpu_to_le32(cmd->stats.write_hits); in __commit_transaction()
713 disk_super->write_misses = cpu_to_le32(cmd->stats.write_misses); in __commit_transaction()
714 __copy_sm_root(cmd, disk_super); in __commit_transaction()
716 return dm_tm_commit(cmd->tm, sblock); in __commit_transaction()
753 struct dm_cache_metadata *cmd; in metadata_open() local
755 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); in metadata_open()
756 if (!cmd) { in metadata_open()
761 cmd->version = metadata_version; in metadata_open()
762 refcount_set(&cmd->ref_count, 1); in metadata_open()
763 init_rwsem(&cmd->root_lock); in metadata_open()
764 cmd->bdev = bdev; in metadata_open()
765 cmd->data_block_size = data_block_size; in metadata_open()
766 cmd->cache_blocks = 0; in metadata_open()
767 cmd->policy_hint_size = policy_hint_size; in metadata_open()
768 cmd->changed = true; in metadata_open()
769 cmd->fail_io = false; in metadata_open()
771 r = __create_persistent_data_objects(cmd, may_format_device); in metadata_open()
773 kfree(cmd); in metadata_open()
777 r = __begin_transaction_flags(cmd, clear_clean_shutdown); in metadata_open()
779 dm_cache_metadata_close(cmd); in metadata_open()
783 return cmd; in metadata_open()
796 struct dm_cache_metadata *cmd; in lookup() local
798 list_for_each_entry(cmd, &table, list) in lookup()
799 if (cmd->bdev == bdev) { in lookup()
800 refcount_inc(&cmd->ref_count); in lookup()
801 return cmd; in lookup()
813 struct dm_cache_metadata *cmd, *cmd2; in lookup_or_open() local
816 cmd = lookup(bdev); in lookup_or_open()
819 if (cmd) in lookup_or_open()
820 return cmd; in lookup_or_open()
822 cmd = metadata_open(bdev, data_block_size, may_format_device, in lookup_or_open()
824 if (!IS_ERR(cmd)) { in lookup_or_open()
829 __destroy_persistent_data_objects(cmd); in lookup_or_open()
830 kfree(cmd); in lookup_or_open()
833 list_add(&cmd->list, &table); in lookup_or_open()
837 return cmd; in lookup_or_open()
840 static bool same_params(struct dm_cache_metadata *cmd, sector_t data_block_size) in same_params() argument
842 if (cmd->data_block_size != data_block_size) { in same_params()
845 (unsigned long long) cmd->data_block_size); in same_params()
858 struct dm_cache_metadata *cmd = lookup_or_open(bdev, data_block_size, may_format_device, in dm_cache_metadata_open() local
861 if (!IS_ERR(cmd) && !same_params(cmd, data_block_size)) { in dm_cache_metadata_open()
862 dm_cache_metadata_close(cmd); in dm_cache_metadata_open()
866 return cmd; in dm_cache_metadata_open()
869 void dm_cache_metadata_close(struct dm_cache_metadata *cmd) in dm_cache_metadata_close() argument
871 if (refcount_dec_and_test(&cmd->ref_count)) { in dm_cache_metadata_close()
873 list_del(&cmd->list); in dm_cache_metadata_close()
876 if (!cmd->fail_io) in dm_cache_metadata_close()
877 __destroy_persistent_data_objects(cmd); in dm_cache_metadata_close()
878 kfree(cmd); in dm_cache_metadata_close()
885 static int block_clean_combined_dirty(struct dm_cache_metadata *cmd, dm_cblock_t b, in block_clean_combined_dirty() argument
893 r = dm_array_get_value(&cmd->info, cmd->root, from_cblock(b), &value); in block_clean_combined_dirty()
903 static int blocks_are_clean_combined_dirty(struct dm_cache_metadata *cmd, in blocks_are_clean_combined_dirty() argument
911 r = block_clean_combined_dirty(cmd, begin, result); in blocks_are_clean_combined_dirty()
929 static int blocks_are_clean_separate_dirty(struct dm_cache_metadata *cmd, in blocks_are_clean_separate_dirty() argument
937 if (from_cblock(cmd->cache_blocks) == 0) in blocks_are_clean_separate_dirty()
941 r = dm_bitset_cursor_begin(&cmd->dirty_info, cmd->dirty_root, in blocks_are_clean_separate_dirty()
942 from_cblock(cmd->cache_blocks), &cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
948 r = dm_bitset_cursor_skip(&cmd->dirty_cursor, from_cblock(begin)); in blocks_are_clean_separate_dirty()
951 dm_bitset_cursor_end(&cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
960 dirty_flag = dm_bitset_cursor_get_value(&cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
964 dm_bitset_cursor_end(&cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
973 r = dm_bitset_cursor_next(&cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
976 dm_bitset_cursor_end(&cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
981 dm_bitset_cursor_end(&cmd->dirty_cursor); in blocks_are_clean_separate_dirty()
986 static int blocks_are_unmapped_or_clean(struct dm_cache_metadata *cmd, in blocks_are_unmapped_or_clean() argument
990 if (separate_dirty_bits(cmd)) in blocks_are_unmapped_or_clean()
991 return blocks_are_clean_separate_dirty(cmd, begin, end, result); in blocks_are_unmapped_or_clean()
993 return blocks_are_clean_combined_dirty(cmd, begin, end, result); in blocks_are_unmapped_or_clean()
996 static bool cmd_write_lock(struct dm_cache_metadata *cmd) in cmd_write_lock() argument
998 down_write(&cmd->root_lock); in cmd_write_lock()
999 if (cmd->fail_io || dm_bm_is_read_only(cmd->bm)) { in cmd_write_lock()
1000 up_write(&cmd->root_lock); in cmd_write_lock()
1006 #define WRITE_LOCK(cmd) \ argument
1008 if (!cmd_write_lock((cmd))) \
1012 #define WRITE_LOCK_VOID(cmd) \ argument
1014 if (!cmd_write_lock((cmd))) \
1018 #define WRITE_UNLOCK(cmd) \ argument
1019 up_write(&(cmd)->root_lock)
1021 static bool cmd_read_lock(struct dm_cache_metadata *cmd) in cmd_read_lock() argument
1023 down_read(&cmd->root_lock); in cmd_read_lock()
1024 if (cmd->fail_io) { in cmd_read_lock()
1025 up_read(&cmd->root_lock); in cmd_read_lock()
1031 #define READ_LOCK(cmd) \ argument
1033 if (!cmd_read_lock((cmd))) \
1037 #define READ_LOCK_VOID(cmd) \ argument
1039 if (!cmd_read_lock((cmd))) \
1043 #define READ_UNLOCK(cmd) \ argument
1044 up_read(&(cmd)->root_lock)
1046 int dm_cache_resize(struct dm_cache_metadata *cmd, dm_cblock_t new_cache_size) in dm_cache_resize() argument
1052 WRITE_LOCK(cmd); in dm_cache_resize()
1055 if (from_cblock(new_cache_size) < from_cblock(cmd->cache_blocks)) { in dm_cache_resize()
1056 r = blocks_are_unmapped_or_clean(cmd, new_cache_size, cmd->cache_blocks, &clean); in dm_cache_resize()
1070 r = dm_array_resize(&cmd->info, cmd->root, from_cblock(cmd->cache_blocks), in dm_cache_resize()
1072 &null_mapping, &cmd->root); in dm_cache_resize()
1076 if (separate_dirty_bits(cmd)) { in dm_cache_resize()
1077 r = dm_bitset_resize(&cmd->dirty_info, cmd->dirty_root, in dm_cache_resize()
1078 from_cblock(cmd->cache_blocks), from_cblock(new_cache_size), in dm_cache_resize()
1079 false, &cmd->dirty_root); in dm_cache_resize()
1084 cmd->cache_blocks = new_cache_size; in dm_cache_resize()
1085 cmd->changed = true; in dm_cache_resize()
1088 WRITE_UNLOCK(cmd); in dm_cache_resize()
1093 int dm_cache_discard_bitset_resize(struct dm_cache_metadata *cmd, in dm_cache_discard_bitset_resize() argument
1099 WRITE_LOCK(cmd); in dm_cache_discard_bitset_resize()
1100 r = dm_bitset_resize(&cmd->discard_info, in dm_cache_discard_bitset_resize()
1101 cmd->discard_root, in dm_cache_discard_bitset_resize()
1102 from_dblock(cmd->discard_nr_blocks), in dm_cache_discard_bitset_resize()
1104 false, &cmd->discard_root); in dm_cache_discard_bitset_resize()
1106 cmd->discard_block_size = discard_block_size; in dm_cache_discard_bitset_resize()
1107 cmd->discard_nr_blocks = new_nr_entries; in dm_cache_discard_bitset_resize()
1110 cmd->changed = true; in dm_cache_discard_bitset_resize()
1111 WRITE_UNLOCK(cmd); in dm_cache_discard_bitset_resize()
1116 static int __set_discard(struct dm_cache_metadata *cmd, dm_dblock_t b) in __set_discard() argument
1118 return dm_bitset_set_bit(&cmd->discard_info, cmd->discard_root, in __set_discard()
1119 from_dblock(b), &cmd->discard_root); in __set_discard()
1122 static int __clear_discard(struct dm_cache_metadata *cmd, dm_dblock_t b) in __clear_discard() argument
1124 return dm_bitset_clear_bit(&cmd->discard_info, cmd->discard_root, in __clear_discard()
1125 from_dblock(b), &cmd->discard_root); in __clear_discard()
1128 static int __discard(struct dm_cache_metadata *cmd, in __discard() argument
1133 r = (discard ? __set_discard : __clear_discard)(cmd, dblock); in __discard()
1137 cmd->changed = true; in __discard()
1141 int dm_cache_set_discard(struct dm_cache_metadata *cmd, in dm_cache_set_discard() argument
1146 WRITE_LOCK(cmd); in dm_cache_set_discard()
1147 r = __discard(cmd, dblock, discard); in dm_cache_set_discard()
1148 WRITE_UNLOCK(cmd); in dm_cache_set_discard()
1153 static int __load_discards(struct dm_cache_metadata *cmd, in __load_discards() argument
1160 if (from_dblock(cmd->discard_nr_blocks) == 0) in __load_discards()
1164 if (cmd->clean_when_opened) { in __load_discards()
1165 r = dm_bitset_flush(&cmd->discard_info, cmd->discard_root, &cmd->discard_root); in __load_discards()
1169 r = dm_bitset_cursor_begin(&cmd->discard_info, cmd->discard_root, in __load_discards()
1170 from_dblock(cmd->discard_nr_blocks), &c); in __load_discards()
1175 r = fn(context, cmd->discard_block_size, to_dblock(b), in __load_discards()
1180 if (b >= (from_dblock(cmd->discard_nr_blocks) - 1)) in __load_discards()
1191 for (b = 0; b < from_dblock(cmd->discard_nr_blocks); b++) { in __load_discards()
1192 r = fn(context, cmd->discard_block_size, to_dblock(b), false); in __load_discards()
1201 int dm_cache_load_discards(struct dm_cache_metadata *cmd, in dm_cache_load_discards() argument
1206 READ_LOCK(cmd); in dm_cache_load_discards()
1207 r = __load_discards(cmd, fn, context); in dm_cache_load_discards()
1208 READ_UNLOCK(cmd); in dm_cache_load_discards()
1213 int dm_cache_size(struct dm_cache_metadata *cmd, dm_cblock_t *result) in dm_cache_size() argument
1215 READ_LOCK(cmd); in dm_cache_size()
1216 *result = cmd->cache_blocks; in dm_cache_size()
1217 READ_UNLOCK(cmd); in dm_cache_size()
1222 static int __remove(struct dm_cache_metadata *cmd, dm_cblock_t cblock) in __remove() argument
1228 r = dm_array_set_value(&cmd->info, cmd->root, from_cblock(cblock), in __remove()
1229 &value, &cmd->root); in __remove()
1233 cmd->changed = true; in __remove()
1237 int dm_cache_remove_mapping(struct dm_cache_metadata *cmd, dm_cblock_t cblock) in dm_cache_remove_mapping() argument
1241 WRITE_LOCK(cmd); in dm_cache_remove_mapping()
1242 r = __remove(cmd, cblock); in dm_cache_remove_mapping()
1243 WRITE_UNLOCK(cmd); in dm_cache_remove_mapping()
1248 static int __insert(struct dm_cache_metadata *cmd, in __insert() argument
1255 r = dm_array_set_value(&cmd->info, cmd->root, from_cblock(cblock), in __insert()
1256 &value, &cmd->root); in __insert()
1260 cmd->changed = true; in __insert()
1264 int dm_cache_insert_mapping(struct dm_cache_metadata *cmd, in dm_cache_insert_mapping() argument
1269 WRITE_LOCK(cmd); in dm_cache_insert_mapping()
1270 r = __insert(cmd, cblock, oblock); in dm_cache_insert_mapping()
1271 WRITE_UNLOCK(cmd); in dm_cache_insert_mapping()
1280 struct dm_cache_metadata *cmd; member
1285 static bool policy_unchanged(struct dm_cache_metadata *cmd, in policy_unchanged() argument
1295 if (strncmp(cmd->policy_name, policy_name, sizeof(cmd->policy_name))) in policy_unchanged()
1301 if (cmd->policy_version[0] != policy_version[0]) in policy_unchanged()
1307 if (cmd->policy_hint_size != policy_hint_size) in policy_unchanged()
1313 static bool hints_array_initialized(struct dm_cache_metadata *cmd) in hints_array_initialized() argument
1315 return cmd->hint_root && cmd->policy_hint_size; in hints_array_initialized()
1318 static bool hints_array_available(struct dm_cache_metadata *cmd, in hints_array_available() argument
1321 return cmd->clean_when_opened && policy_unchanged(cmd, policy) && in hints_array_available()
1322 hints_array_initialized(cmd); in hints_array_available()
1325 static int __load_mapping_v1(struct dm_cache_metadata *cmd, in __load_mapping_v1() argument
1352 if (cmd->clean_when_opened) in __load_mapping_v1()
1366 static int __load_mapping_v2(struct dm_cache_metadata *cmd, in __load_mapping_v2() argument
1394 if (cmd->clean_when_opened) in __load_mapping_v2()
1408 static int __load_mappings(struct dm_cache_metadata *cmd, in __load_mappings() argument
1415 bool hints_valid = hints_array_available(cmd, policy); in __load_mappings()
1417 if (from_cblock(cmd->cache_blocks) == 0) in __load_mappings()
1421 r = dm_array_cursor_begin(&cmd->info, cmd->root, &cmd->mapping_cursor); in __load_mappings()
1426 r = dm_array_cursor_begin(&cmd->hint_info, cmd->hint_root, &cmd->hint_cursor); in __load_mappings()
1428 dm_array_cursor_end(&cmd->mapping_cursor); in __load_mappings()
1433 if (separate_dirty_bits(cmd)) { in __load_mappings()
1434 r = dm_bitset_cursor_begin(&cmd->dirty_info, cmd->dirty_root, in __load_mappings()
1435 from_cblock(cmd->cache_blocks), in __load_mappings()
1436 &cmd->dirty_cursor); in __load_mappings()
1438 dm_array_cursor_end(&cmd->hint_cursor); in __load_mappings()
1439 dm_array_cursor_end(&cmd->mapping_cursor); in __load_mappings()
1445 if (separate_dirty_bits(cmd)) in __load_mappings()
1446 r = __load_mapping_v2(cmd, cb, hints_valid, in __load_mappings()
1447 &cmd->mapping_cursor, in __load_mappings()
1448 &cmd->hint_cursor, in __load_mappings()
1449 &cmd->dirty_cursor, in __load_mappings()
1452 r = __load_mapping_v1(cmd, cb, hints_valid, in __load_mappings()
1453 &cmd->mapping_cursor, &cmd->hint_cursor, in __load_mappings()
1461 if (cb >= (from_cblock(cmd->cache_blocks) - 1)) in __load_mappings()
1464 r = dm_array_cursor_next(&cmd->mapping_cursor); in __load_mappings()
1471 r = dm_array_cursor_next(&cmd->hint_cursor); in __load_mappings()
1473 dm_array_cursor_end(&cmd->hint_cursor); in __load_mappings()
1478 if (separate_dirty_bits(cmd)) { in __load_mappings()
1479 r = dm_bitset_cursor_next(&cmd->dirty_cursor); in __load_mappings()
1487 dm_array_cursor_end(&cmd->mapping_cursor); in __load_mappings()
1489 dm_array_cursor_end(&cmd->hint_cursor); in __load_mappings()
1491 if (separate_dirty_bits(cmd)) in __load_mappings()
1492 dm_bitset_cursor_end(&cmd->dirty_cursor); in __load_mappings()
1497 int dm_cache_load_mappings(struct dm_cache_metadata *cmd, in dm_cache_load_mappings() argument
1503 READ_LOCK(cmd); in dm_cache_load_mappings()
1504 r = __load_mappings(cmd, policy, fn, context); in dm_cache_load_mappings()
1505 READ_UNLOCK(cmd); in dm_cache_load_mappings()
1523 static int __dump_mappings(struct dm_cache_metadata *cmd) in __dump_mappings() argument
1525 return dm_array_walk(&cmd->info, cmd->root, __dump_mapping, NULL); in __dump_mappings()
1528 void dm_cache_dump(struct dm_cache_metadata *cmd) in dm_cache_dump() argument
1530 READ_LOCK_VOID(cmd); in dm_cache_dump()
1531 __dump_mappings(cmd); in dm_cache_dump()
1532 READ_UNLOCK(cmd); in dm_cache_dump()
1535 int dm_cache_changed_this_transaction(struct dm_cache_metadata *cmd) in dm_cache_changed_this_transaction() argument
1539 READ_LOCK(cmd); in dm_cache_changed_this_transaction()
1540 r = cmd->changed; in dm_cache_changed_this_transaction()
1541 READ_UNLOCK(cmd); in dm_cache_changed_this_transaction()
1546 static int __dirty(struct dm_cache_metadata *cmd, dm_cblock_t cblock, bool dirty) in __dirty() argument
1553 r = dm_array_get_value(&cmd->info, cmd->root, from_cblock(cblock), &value); in __dirty()
1566 r = dm_array_set_value(&cmd->info, cmd->root, from_cblock(cblock), in __dirty()
1567 &value, &cmd->root); in __dirty()
1571 cmd->changed = true; in __dirty()
1576 static int __set_dirty_bits_v1(struct dm_cache_metadata *cmd, unsigned nr_bits, unsigned long *bits) in __set_dirty_bits_v1() argument
1581 r = __dirty(cmd, to_cblock(i), test_bit(i, bits)); in __set_dirty_bits_v1()
1596 static int __set_dirty_bits_v2(struct dm_cache_metadata *cmd, unsigned nr_bits, unsigned long *bits) in __set_dirty_bits_v2() argument
1601 if (nr_bits != from_cblock(cmd->cache_blocks)) { in __set_dirty_bits_v2()
1606 r = dm_bitset_del(&cmd->dirty_info, cmd->dirty_root); in __set_dirty_bits_v2()
1610 cmd->changed = true; in __set_dirty_bits_v2()
1611 return dm_bitset_new(&cmd->dirty_info, &cmd->dirty_root, nr_bits, is_dirty_callback, bits); in __set_dirty_bits_v2()
1614 int dm_cache_set_dirty_bits(struct dm_cache_metadata *cmd, in dm_cache_set_dirty_bits() argument
1620 WRITE_LOCK(cmd); in dm_cache_set_dirty_bits()
1621 if (separate_dirty_bits(cmd)) in dm_cache_set_dirty_bits()
1622 r = __set_dirty_bits_v2(cmd, nr_bits, bits); in dm_cache_set_dirty_bits()
1624 r = __set_dirty_bits_v1(cmd, nr_bits, bits); in dm_cache_set_dirty_bits()
1625 WRITE_UNLOCK(cmd); in dm_cache_set_dirty_bits()
1630 void dm_cache_metadata_get_stats(struct dm_cache_metadata *cmd, in dm_cache_metadata_get_stats() argument
1633 READ_LOCK_VOID(cmd); in dm_cache_metadata_get_stats()
1634 *stats = cmd->stats; in dm_cache_metadata_get_stats()
1635 READ_UNLOCK(cmd); in dm_cache_metadata_get_stats()
1638 void dm_cache_metadata_set_stats(struct dm_cache_metadata *cmd, in dm_cache_metadata_set_stats() argument
1641 WRITE_LOCK_VOID(cmd); in dm_cache_metadata_set_stats()
1642 cmd->stats = *stats; in dm_cache_metadata_set_stats()
1643 WRITE_UNLOCK(cmd); in dm_cache_metadata_set_stats()
1646 int dm_cache_commit(struct dm_cache_metadata *cmd, bool clean_shutdown) in dm_cache_commit() argument
1652 WRITE_LOCK(cmd); in dm_cache_commit()
1653 if (cmd->fail_io) in dm_cache_commit()
1656 r = __commit_transaction(cmd, mutator); in dm_cache_commit()
1660 r = __begin_transaction(cmd); in dm_cache_commit()
1662 WRITE_UNLOCK(cmd); in dm_cache_commit()
1666 int dm_cache_get_free_metadata_block_count(struct dm_cache_metadata *cmd, in dm_cache_get_free_metadata_block_count() argument
1671 READ_LOCK(cmd); in dm_cache_get_free_metadata_block_count()
1672 if (!cmd->fail_io) in dm_cache_get_free_metadata_block_count()
1673 r = dm_sm_get_nr_free(cmd->metadata_sm, result); in dm_cache_get_free_metadata_block_count()
1674 READ_UNLOCK(cmd); in dm_cache_get_free_metadata_block_count()
1679 int dm_cache_get_metadata_dev_size(struct dm_cache_metadata *cmd, in dm_cache_get_metadata_dev_size() argument
1684 READ_LOCK(cmd); in dm_cache_get_metadata_dev_size()
1685 if (!cmd->fail_io) in dm_cache_get_metadata_dev_size()
1686 r = dm_sm_get_nr_blocks(cmd->metadata_sm, result); in dm_cache_get_metadata_dev_size()
1687 READ_UNLOCK(cmd); in dm_cache_get_metadata_dev_size()
1709 static int write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *policy) in write_hints() argument
1717 (strlen(policy_name) > sizeof(cmd->policy_name) - 1)) in write_hints()
1720 strncpy(cmd->policy_name, policy_name, sizeof(cmd->policy_name)); in write_hints()
1721 memcpy(cmd->policy_version, policy_version, sizeof(cmd->policy_version)); in write_hints()
1726 cmd->policy_hint_size = hint_size; in write_hints()
1728 if (cmd->hint_root) { in write_hints()
1729 r = dm_array_del(&cmd->hint_info, cmd->hint_root); in write_hints()
1734 return dm_array_new(&cmd->hint_info, &cmd->hint_root, in write_hints()
1735 from_cblock(cmd->cache_blocks), in write_hints()
1739 int dm_cache_write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *policy) in dm_cache_write_hints() argument
1743 WRITE_LOCK(cmd); in dm_cache_write_hints()
1744 r = write_hints(cmd, policy); in dm_cache_write_hints()
1745 WRITE_UNLOCK(cmd); in dm_cache_write_hints()
1750 int dm_cache_metadata_all_clean(struct dm_cache_metadata *cmd, bool *result) in dm_cache_metadata_all_clean() argument
1754 READ_LOCK(cmd); in dm_cache_metadata_all_clean()
1755 r = blocks_are_unmapped_or_clean(cmd, 0, cmd->cache_blocks, result); in dm_cache_metadata_all_clean()
1756 READ_UNLOCK(cmd); in dm_cache_metadata_all_clean()
1761 void dm_cache_metadata_set_read_only(struct dm_cache_metadata *cmd) in dm_cache_metadata_set_read_only() argument
1763 WRITE_LOCK_VOID(cmd); in dm_cache_metadata_set_read_only()
1764 dm_bm_set_read_only(cmd->bm); in dm_cache_metadata_set_read_only()
1765 WRITE_UNLOCK(cmd); in dm_cache_metadata_set_read_only()
1768 void dm_cache_metadata_set_read_write(struct dm_cache_metadata *cmd) in dm_cache_metadata_set_read_write() argument
1770 WRITE_LOCK_VOID(cmd); in dm_cache_metadata_set_read_write()
1771 dm_bm_set_read_write(cmd->bm); in dm_cache_metadata_set_read_write()
1772 WRITE_UNLOCK(cmd); in dm_cache_metadata_set_read_write()
1775 int dm_cache_metadata_set_needs_check(struct dm_cache_metadata *cmd) in dm_cache_metadata_set_needs_check() argument
1781 WRITE_LOCK(cmd); in dm_cache_metadata_set_needs_check()
1782 set_bit(NEEDS_CHECK, &cmd->flags); in dm_cache_metadata_set_needs_check()
1784 r = superblock_lock(cmd, &sblock); in dm_cache_metadata_set_needs_check()
1791 disk_super->flags = cpu_to_le32(cmd->flags); in dm_cache_metadata_set_needs_check()
1796 WRITE_UNLOCK(cmd); in dm_cache_metadata_set_needs_check()
1800 int dm_cache_metadata_needs_check(struct dm_cache_metadata *cmd, bool *result) in dm_cache_metadata_needs_check() argument
1802 READ_LOCK(cmd); in dm_cache_metadata_needs_check()
1803 *result = !!test_bit(NEEDS_CHECK, &cmd->flags); in dm_cache_metadata_needs_check()
1804 READ_UNLOCK(cmd); in dm_cache_metadata_needs_check()
1809 int dm_cache_metadata_abort(struct dm_cache_metadata *cmd) in dm_cache_metadata_abort() argument
1813 WRITE_LOCK(cmd); in dm_cache_metadata_abort()
1814 __destroy_persistent_data_objects(cmd); in dm_cache_metadata_abort()
1815 r = __create_persistent_data_objects(cmd, false); in dm_cache_metadata_abort()
1817 cmd->fail_io = true; in dm_cache_metadata_abort()
1818 WRITE_UNLOCK(cmd); in dm_cache_metadata_abort()