4 #include <linux/rbtree.h>
6 #define EXTENT_MAP_LAST_BYTE (u64)-4
7 #define EXTENT_MAP_HOLE (u64)-3
8 #define EXTENT_MAP_INLINE (u64)-2
9 #define EXTENT_MAP_DELALLOC (u64)-1
11 /* bits for the flags field */
12 #define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */
13 #define EXTENT_FLAG_COMPRESSED 1
14 #define EXTENT_FLAG_VACANCY 2 /* no file extent item found */
17 struct rb_node rb_node;
19 /* all of these are in bytes */
25 struct block_device *bdev;
30 struct extent_map_tree {
35 static inline u64 extent_map_end(struct extent_map *em)
37 if (em->start + em->len < em->start)
39 return em->start + em->len;
42 static inline u64 extent_map_block_end(struct extent_map *em)
44 if (em->block_start + em->block_len < em->block_start)
46 return em->block_start + em->block_len;
49 void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask);
50 struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
52 int add_extent_mapping(struct extent_map_tree *tree,
53 struct extent_map *em);
54 int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
56 struct extent_map *alloc_extent_map(gfp_t mask);
57 void free_extent_map(struct extent_map *em);
58 int __init extent_map_init(void);
59 void extent_map_exit(void);