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;
14 int (*fill_delalloc)(struct inode *inode, u64 start, u64 end);
17 /* note, this must start with the same fields as fs/extent_map.c:tree_entry */
20 u64 end; /* inclusive */
22 struct rb_node rb_node;
23 /* block_start and block_end are in bytes */
25 u64 block_end; /* inclusive */
26 struct block_device *bdev;
30 /* note, this must start with the same fields as fs/extent_map.c:tree_entry */
33 u64 end; /* inclusive */
35 struct rb_node rb_node;
39 struct list_head list;
42 struct extent_buffer {
44 u64 end; /* inclusive */
49 typedef struct extent_map *(get_extent_t)(struct inode *inode,
55 void extent_map_tree_init(struct extent_map_tree *tree,
56 struct address_space *mapping, gfp_t mask);
57 struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
59 int add_extent_mapping(struct extent_map_tree *tree,
60 struct extent_map *em);
61 int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
62 int try_release_extent_mapping(struct extent_map_tree *tree, struct page *page);
63 int lock_extent(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask);
64 int unlock_extent(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask);
65 struct extent_map *alloc_extent_map(gfp_t mask);
66 void free_extent_map(struct extent_map *em);
67 int extent_read_full_page(struct extent_map_tree *tree, struct page *page,
68 get_extent_t *get_extent);
69 void __init extent_map_init(void);
70 void __exit extent_map_exit(void);
71 int extent_clean_all_trees(struct extent_map_tree *tree);
72 int set_extent_uptodate(struct extent_map_tree *tree, u64 start, u64 end,
74 int set_extent_new(struct extent_map_tree *tree, u64 start, u64 end,
76 int set_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end,
78 int set_extent_delalloc(struct extent_map_tree *tree, u64 start, u64 end,
80 int extent_invalidatepage(struct extent_map_tree *tree,
81 struct page *page, unsigned long offset);
82 int extent_write_full_page(struct extent_map_tree *tree, struct page *page,
83 get_extent_t *get_extent,
84 struct writeback_control *wbc);
85 int extent_prepare_write(struct extent_map_tree *tree,
86 struct inode *inode, struct page *page,
87 unsigned from, unsigned to, get_extent_t *get_extent);
88 int extent_commit_write(struct extent_map_tree *tree,
89 struct inode *inode, struct page *page,
90 unsigned from, unsigned to);
91 int set_range_dirty(struct extent_map_tree *tree, u64 start, u64 end);