diff options
Diffstat (limited to 'fs/btrfs/free-space-cache.h')
| -rw-r--r-- | fs/btrfs/free-space-cache.h | 71 |
1 files changed, 46 insertions, 25 deletions
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h index 2e0a8077aa74..9f1dbfdee8ca 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 +#include <linux/rbtree.h> +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/mutex.h> +#include <linux/freezer.h> +#include "fs.h" + +struct inode; +struct page; +struct btrfs_fs_info; +struct btrfs_path; +struct btrfs_trans_handle; +struct btrfs_trim_block_group; + /* * This is the trim state of an extent or bitmap. * @@ -22,6 +36,7 @@ enum btrfs_trim_state { struct btrfs_free_space { struct rb_node offset_index; + struct rb_node bytes_index; u64 offset; u64 bytes; u64 max_extent_size; @@ -42,9 +57,26 @@ static inline bool btrfs_free_space_trimming_bitmap( return (info->trim_state == BTRFS_TRIM_STATE_TRIMMING); } +static inline bool btrfs_trim_interrupted(void) +{ + return fatal_signal_pending(current) || freezing(current); +} + +/* + * Deltas are an effective way to populate global statistics. Give macro names + * to make it clear what we're doing. An example is discard_extents in + * btrfs_free_space_ctl. + */ +enum { + BTRFS_STAT_CURR, + BTRFS_STAT_PREV, + BTRFS_STAT_NR_ENTRIES, +}; + struct btrfs_free_space_ctl { spinlock_t tree_lock; struct rb_root free_space_offset; + struct rb_root_cached free_space_bytes; u64 free_space; int extents_thresh; int free_extents; @@ -54,13 +86,12 @@ struct btrfs_free_space_ctl { s32 discardable_extents[BTRFS_STAT_NR_ENTRIES]; s64 discardable_bytes[BTRFS_STAT_NR_ENTRIES]; const struct btrfs_free_space_op *op; - void *private; + struct btrfs_block_group *block_group; struct mutex cache_writeout_mutex; struct list_head trimming_ranges; }; struct btrfs_free_space_op { - void (*recalc_thresholds)(struct btrfs_free_space_ctl *ctl); bool (*use_bitmap)(struct btrfs_free_space_ctl *ctl, struct btrfs_free_space *info); }; @@ -76,17 +107,19 @@ struct btrfs_io_ctl { int num_pages; int entries; int bitmaps; - unsigned check_crcs:1; }; +int __init btrfs_free_space_init(void); +void __cold btrfs_free_space_exit(void); struct inode *lookup_free_space_inode(struct btrfs_block_group *block_group, struct btrfs_path *path); int create_free_space_inode(struct btrfs_trans_handle *trans, struct btrfs_block_group *block_group, struct btrfs_path *path); +int btrfs_remove_free_space_inode(struct btrfs_trans_handle *trans, + struct inode *inode, + struct btrfs_block_group *block_group); -int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info, - struct btrfs_block_rsv *rsv); int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans, struct btrfs_block_group *block_group, struct inode *inode); @@ -97,36 +130,22 @@ int btrfs_wait_cache_io(struct btrfs_trans_handle *trans, int btrfs_write_out_cache(struct btrfs_trans_handle *trans, struct btrfs_block_group *block_group, struct btrfs_path *path); -struct inode *lookup_free_ino_inode(struct btrfs_root *root, - struct btrfs_path *path); -int create_free_ino_inode(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_path *path); -int load_free_ino_cache(struct btrfs_fs_info *fs_info, - struct btrfs_root *root); -int btrfs_write_out_ino_cache(struct btrfs_root *root, - struct btrfs_trans_handle *trans, - struct btrfs_path *path, - struct inode *inode); - -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, - enum btrfs_trim_state trim_state); + +void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group, + struct btrfs_free_space_ctl *ctl); int btrfs_add_free_space(struct btrfs_block_group *block_group, u64 bytenr, u64 size); +int btrfs_add_free_space_unused(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); -u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root); void btrfs_dump_free_space(struct btrfs_block_group *block_group, u64 bytes); int btrfs_find_space_cluster(struct btrfs_block_group *block_group, @@ -136,7 +155,7 @@ void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster); u64 btrfs_alloc_from_cluster(struct btrfs_block_group *block_group, struct btrfs_free_cluster *cluster, u64 bytes, u64 min_start, u64 *max_extent_size); -int btrfs_return_cluster_to_free_space( +void btrfs_return_cluster_to_free_space( struct btrfs_block_group *block_group, struct btrfs_free_cluster *cluster); int btrfs_trim_block_group(struct btrfs_block_group *block_group, @@ -148,6 +167,8 @@ int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group, u64 *trimmed, u64 start, u64 end, u64 minlen, u64 maxlen, bool async); +bool btrfs_free_space_cache_v1_active(struct btrfs_fs_info *fs_info); +int btrfs_set_free_space_cache_v1_active(struct btrfs_fs_info *fs_info, bool active); /* Support functions for running our sanity tests */ #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS int test_add_free_space_entry(struct btrfs_block_group *cache, |