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 */
15 #define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
18 struct rb_node rb_node;
20 /* all of these are in bytes */
26 struct block_device *bdev;
31 struct extent_map_tree {
36 static inline u64 extent_map_end(struct extent_map *em)
38 if (em->start + em->len < em->start)
40 return em->start + em->len;
43 static inline u64 extent_map_block_end(struct extent_map *em)
45 if (em->block_start + em->block_len < em->block_start)
47 return em->block_start + em->block_len;
50 void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask);
51 struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
53 int add_extent_mapping(struct extent_map_tree *tree,
54 struct extent_map *em);
55 int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
57 struct extent_map *alloc_extent_map(gfp_t mask);
58 void free_extent_map(struct extent_map *em);
59 int __init extent_map_init(void);
60 void extent_map_exit(void);