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6 #ifndef BTRFS_BACKREF_H
7 #define BTRFS_BACKREF_H
8
9 #include <linux/btrfs.h>
10 #include "ulist.h"
11 #include "extent_io.h"
12
13 struct inode_fs_paths {
14 struct btrfs_path *btrfs_path;
15 struct btrfs_root *fs_root;
16 struct btrfs_data_container *fspath;
17 };
18
19 typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
20 void *ctx);
21
22 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
23 struct btrfs_path *path, struct btrfs_key *found_key,
24 u64 *flags);
25
26 int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
27 struct btrfs_key *key, struct btrfs_extent_item *ei,
28 u32 item_size, u64 *out_root, u8 *out_level);
29
30 int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
31 u64 extent_item_objectid,
32 u64 extent_offset, int search_commit_root,
33 iterate_extent_inodes_t *iterate, void *ctx,
34 bool ignore_offset);
35
36 int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
37 struct btrfs_path *path,
38 iterate_extent_inodes_t *iterate, void *ctx,
39 bool ignore_offset);
40
41 int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
42
43 int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
44 struct btrfs_fs_info *fs_info, u64 bytenr,
45 u64 time_seq, struct ulist **roots, bool ignore_offset);
46 char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
47 u32 name_len, unsigned long name_off,
48 struct extent_buffer *eb_in, u64 parent,
49 char *dest, u32 size);
50
51 struct btrfs_data_container *init_data_container(u32 total_bytes);
52 struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
53 struct btrfs_path *path);
54 void free_ipath(struct inode_fs_paths *ipath);
55
56 int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
57 u64 start_off, struct btrfs_path *path,
58 struct btrfs_inode_extref **ret_extref,
59 u64 *found_off);
60 int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr,
61 struct ulist *roots, struct ulist *tmp_ulist);
62
63 int __init btrfs_prelim_ref_init(void);
64 void __cold btrfs_prelim_ref_exit(void);
65
66 struct prelim_ref {
67 struct rb_node rbnode;
68 u64 root_id;
69 struct btrfs_key key_for_search;
70 int level;
71 int count;
72 struct extent_inode_elem *inode_list;
73 u64 parent;
74 u64 wanted_disk_byte;
75 };
76
77 #endif