diff options
Diffstat (limited to 'fs/btrfs/free-space-cache.h')
| -rw-r--r-- | fs/btrfs/free-space-cache.h | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h index ba9a23241101..2e0a8077aa74 100644 --- a/fs/btrfs/free-space-cache.h +++ b/fs/btrfs/free-space-cache.h @@ -6,6 +6,20 @@ #ifndef BTRFS_FREE_SPACE_CACHE_H #define BTRFS_FREE_SPACE_CACHE_H +/* + * This is the trim state of an extent or bitmap. + * + * BTRFS_TRIM_STATE_TRIMMING is special and used to maintain the state of a + * bitmap as we may need several trims to fully trim a single bitmap entry. + * This is reset should any free space other than trimmed space be added to the + * bitmap. + */ +enum btrfs_trim_state { + BTRFS_TRIM_STATE_UNTRIMMED, + BTRFS_TRIM_STATE_TRIMMED, + BTRFS_TRIM_STATE_TRIMMING, +}; + struct btrfs_free_space { struct rb_node offset_index; u64 offset; @@ -13,8 +27,21 @@ struct btrfs_free_space { u64 max_extent_size; unsigned long *bitmap; struct list_head list; + enum btrfs_trim_state trim_state; + s32 bitmap_extents; }; +static inline bool btrfs_free_space_trimmed(struct btrfs_free_space *info) +{ + return (info->trim_state == BTRFS_TRIM_STATE_TRIMMED); +} + +static inline bool btrfs_free_space_trimming_bitmap( + struct btrfs_free_space *info) +{ + return (info->trim_state == BTRFS_TRIM_STATE_TRIMMING); +} + struct btrfs_free_space_ctl { spinlock_t tree_lock; struct rb_root free_space_offset; @@ -24,6 +51,8 @@ struct btrfs_free_space_ctl { int total_bitmaps; int unit; u64 start; + s32 discardable_extents[BTRFS_STAT_NR_ENTRIES]; + s64 discardable_bytes[BTRFS_STAT_NR_ENTRIES]; const struct btrfs_free_space_op *op; void *private; struct mutex cache_writeout_mutex; @@ -83,13 +112,17 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root, void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group); int __btrfs_add_free_space(struct btrfs_fs_info *fs_info, struct btrfs_free_space_ctl *ctl, - u64 bytenr, u64 size); + u64 bytenr, u64 size, + enum btrfs_trim_state trim_state); int btrfs_add_free_space(struct btrfs_block_group *block_group, u64 bytenr, u64 size); +int btrfs_add_free_space_async_trimmed(struct btrfs_block_group *block_group, + u64 bytenr, u64 size); int btrfs_remove_free_space(struct btrfs_block_group *block_group, u64 bytenr, u64 size); void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl); void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group); +bool btrfs_is_free_space_trimmed(struct btrfs_block_group *block_group); u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group, u64 offset, u64 bytes, u64 empty_size, u64 *max_extent_size); @@ -108,6 +141,12 @@ int btrfs_return_cluster_to_free_space( struct btrfs_free_cluster *cluster); int btrfs_trim_block_group(struct btrfs_block_group *block_group, u64 *trimmed, u64 start, u64 end, u64 minlen); +int btrfs_trim_block_group_extents(struct btrfs_block_group *block_group, + u64 *trimmed, u64 start, u64 end, u64 minlen, + bool async); +int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group, + u64 *trimmed, u64 start, u64 end, u64 minlen, + u64 maxlen, bool async); /* Support functions for running our sanity tests */ #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |