4 #include <linux/rbtree.h>
6 #define EXTENT_MAP_INLINE (u64)-2
7 #define EXTENT_MAP_DELALLOC (u64)-1
9 struct extent_map_tree {
12 struct address_space *mapping;
16 /* note, this must start with the same fields as fs/extent_map.c:tree_entry */
19 u64 end; /* inclusive */
21 struct rb_node rb_node;
22 /* block_start and block_end are in bytes */
24 u64 block_end; /* inclusive */
25 struct block_device *bdev;
29 /* note, this must start with the same fields as fs/extent_map.c:tree_entry */
32 u64 end; /* inclusive */
34 struct rb_node rb_node;
38 struct list_head list;
41 struct extent_buffer {
43 u64 end; /* inclusive */
48 typedef struct extent_map *(get_extent_t)(struct inode *inode,
54 void extent_map_tree_init(struct extent_map_tree *tree,
55 struct address_space *mapping, gfp_t mask);
56 struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
58 int add_extent_mapping(struct extent_map_tree *tree,
59 struct extent_map *em);
60 int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
61 int try_release_extent_mapping(struct extent_map_tree *tree, struct page *page);
62 int lock_extent(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask);
63 int unlock_extent(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask);
64 struct extent_map *alloc_extent_map(gfp_t mask);
65 void free_extent_map(struct extent_map *em);
66 int extent_read_full_page(struct extent_map_tree *tree, struct page *page,
67 get_extent_t *get_extent);
68 void __init extent_map_init(void);
69 void __exit extent_map_exit(void);
70 int extent_clean_all_trees(struct extent_map_tree *tree);
71 int set_extent_uptodate(struct extent_map_tree *tree, u64 start, u64 end,
73 int set_extent_new(struct extent_map_tree *tree, u64 start, u64 end,
75 int set_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end,
77 int extent_invalidatepage(struct extent_map_tree *tree,
78 struct page *page, unsigned long offset);
79 int extent_write_full_page(struct extent_map_tree *tree, struct page *page,
80 get_extent_t *get_extent,
81 struct writeback_control *wbc);
82 int extent_prepare_write(struct extent_map_tree *tree,
83 struct inode *inode, struct page *page,
84 unsigned from, unsigned to, get_extent_t *get_extent);
85 int extent_commit_write(struct extent_map_tree *tree,
86 struct inode *inode, struct page *page,
87 unsigned from, unsigned to);
88 int set_range_dirty(struct extent_map_tree *tree, u64 start, u64 end);