diff options
Diffstat (limited to 'fs/btrfs/extent_map.h')
| -rw-r--r-- | fs/btrfs/extent_map.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index 8e217337dff9..ad311864272a 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -25,6 +25,8 @@ enum { EXTENT_FLAG_FILLING, /* filesystem extent mapping type */ EXTENT_FLAG_FS_MAPPING, + /* This em is merged from two or more physically adjacent ems */ + EXTENT_FLAG_MERGED, }; struct extent_map { @@ -40,6 +42,12 @@ struct extent_map { u64 ram_bytes; u64 block_start; u64 block_len; + + /* + * Generation of the extent map, for merged em it's the highest + * generation of all merged ems. + * For non-merged extents, it's from btrfs_file_extent_item::generation. + */ u64 generation; unsigned long flags; /* Used for chunk mappings, flag EXTENT_FLAG_FS_MAPPING must be set */ @@ -55,6 +63,8 @@ struct extent_map_tree { rwlock_t lock; }; +struct btrfs_inode; + static inline int extent_map_in_tree(const struct extent_map *em) { return !RB_EMPTY_NODE(&em->rb_node); @@ -96,5 +106,11 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree, int btrfs_add_extent_mapping(struct btrfs_fs_info *fs_info, struct extent_map_tree *em_tree, struct extent_map **em_in, u64 start, u64 len); +void btrfs_drop_extent_map_range(struct btrfs_inode *inode, + u64 start, u64 end, + bool skip_pinned); +int btrfs_replace_extent_map_range(struct btrfs_inode *inode, + struct extent_map *new_em, + bool modified); #endif |