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a542ad1b JS |
1 | /* |
2 | * Copyright (C) 2011 STRATO. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
19 | #ifndef __BTRFS_BACKREF__ | |
20 | #define __BTRFS_BACKREF__ | |
21 | ||
55e301fd | 22 | #include <linux/btrfs.h> |
8da6d581 | 23 | #include "ulist.h" |
91cb916c | 24 | #include "extent_io.h" |
a542ad1b JS |
25 | |
26 | struct inode_fs_paths { | |
27 | struct btrfs_path *btrfs_path; | |
28 | struct btrfs_root *fs_root; | |
29 | struct btrfs_data_container *fspath; | |
30 | }; | |
31 | ||
32 | typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root, | |
33 | void *ctx); | |
a542ad1b | 34 | |
a542ad1b | 35 | int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical, |
69917e43 LB |
36 | struct btrfs_path *path, struct btrfs_key *found_key, |
37 | u64 *flags); | |
a542ad1b JS |
38 | |
39 | int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb, | |
6eda71d0 LB |
40 | struct btrfs_key *key, struct btrfs_extent_item *ei, |
41 | u32 item_size, u64 *out_root, u8 *out_level); | |
a542ad1b JS |
42 | |
43 | int iterate_extent_inodes(struct btrfs_fs_info *fs_info, | |
a542ad1b | 44 | u64 extent_item_objectid, |
7a3ae2f8 | 45 | u64 extent_offset, int search_commit_root, |
c995ab3c ZB |
46 | iterate_extent_inodes_t *iterate, void *ctx, |
47 | bool ignore_offset); | |
a542ad1b JS |
48 | |
49 | int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info, | |
50 | struct btrfs_path *path, | |
c995ab3c ZB |
51 | iterate_extent_inodes_t *iterate, void *ctx, |
52 | bool ignore_offset); | |
a542ad1b JS |
53 | |
54 | int paths_from_inode(u64 inum, struct inode_fs_paths *ipath); | |
55 | ||
8da6d581 | 56 | int btrfs_find_all_roots(struct btrfs_trans_handle *trans, |
fcebe456 | 57 | struct btrfs_fs_info *fs_info, u64 bytenr, |
c995ab3c | 58 | u64 time_seq, struct ulist **roots, bool ignore_offset); |
96b5bd77 JS |
59 | char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, |
60 | u32 name_len, unsigned long name_off, | |
61 | struct extent_buffer *eb_in, u64 parent, | |
62 | char *dest, u32 size); | |
8da6d581 | 63 | |
a542ad1b JS |
64 | struct btrfs_data_container *init_data_container(u32 total_bytes); |
65 | struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root, | |
66 | struct btrfs_path *path); | |
67 | void free_ipath(struct inode_fs_paths *ipath); | |
68 | ||
f186373f MF |
69 | int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid, |
70 | u64 start_off, struct btrfs_path *path, | |
71 | struct btrfs_inode_extref **ret_extref, | |
72 | u64 *found_off); | |
bb739cf0 | 73 | int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr); |
f186373f | 74 | |
b9e9a6cb WS |
75 | int __init btrfs_prelim_ref_init(void); |
76 | void btrfs_prelim_ref_exit(void); | |
00142756 JM |
77 | |
78 | struct prelim_ref { | |
79 | struct rb_node rbnode; | |
80 | u64 root_id; | |
81 | struct btrfs_key key_for_search; | |
82 | int level; | |
83 | int count; | |
84 | struct extent_inode_elem *inode_list; | |
85 | u64 parent; | |
86 | u64 wanted_disk_byte; | |
87 | }; | |
88 | ||
a542ad1b | 89 | #endif |