diff options
Diffstat (limited to 'fs/btrfs/extent_map.h')
| -rw-r--r-- | fs/btrfs/extent_map.h | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index ab6d74b6e64..b2991fd8583 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -3,16 +3,19 @@ #include <linux/rbtree.h> -#define EXTENT_MAP_LAST_BYTE (u64)-4 -#define EXTENT_MAP_HOLE (u64)-3 -#define EXTENT_MAP_INLINE (u64)-2 -#define EXTENT_MAP_DELALLOC (u64)-1 +#define EXTENT_MAP_LAST_BYTE ((u64)-4) +#define EXTENT_MAP_HOLE ((u64)-3) +#define EXTENT_MAP_INLINE ((u64)-2) +#define EXTENT_MAP_DELALLOC ((u64)-1) /* bits for the flags field */ #define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */ #define EXTENT_FLAG_COMPRESSED 1 #define EXTENT_FLAG_VACANCY 2 /* no file extent item found */ #define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */ +#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */ +#define EXTENT_FLAG_FILLING 5 /* Filling in a preallocated extent */ +#define EXTENT_FLAG_FS_MAPPING 6 /* filesystem extent mapping type */ struct extent_map { struct rb_node rb_node; @@ -20,20 +23,32 @@ struct extent_map { /* all of these are in bytes */ u64 start; u64 len; + u64 mod_start; + u64 mod_len; u64 orig_start; + u64 orig_block_len; + u64 ram_bytes; u64 block_start; u64 block_len; + u64 generation; unsigned long flags; struct block_device *bdev; atomic_t refs; - int in_tree; + unsigned int compress_type; + struct list_head list; }; struct extent_map_tree { struct rb_root map; + struct list_head modified_extents; rwlock_t lock; }; +static inline int extent_map_in_tree(const struct extent_map *em) +{ + return !RB_EMPTY_NODE(&em->rb_node); +} + static inline u64 extent_map_end(struct extent_map *em) { if (em->start + em->len < em->start) @@ -48,18 +63,23 @@ static inline u64 extent_map_block_end(struct extent_map *em) return em->block_start + em->block_len; } -void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask); +void extent_map_tree_init(struct extent_map_tree *tree); struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree, u64 start, u64 len); int add_extent_mapping(struct extent_map_tree *tree, - struct extent_map *em); + struct extent_map *em, int modified); int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em); +void replace_extent_mapping(struct extent_map_tree *tree, + struct extent_map *cur, + struct extent_map *new, + int modified); -struct extent_map *alloc_extent_map(gfp_t mask); +struct extent_map *alloc_extent_map(void); void free_extent_map(struct extent_map *em); int __init extent_map_init(void); void extent_map_exit(void); -int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len); +int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen); +void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em); struct extent_map *search_extent_mapping(struct extent_map_tree *tree, u64 start, u64 len); #endif |