btrfs-progs: convert: Fix a bug in rollback check which overwrite return value
[platform/upstream/btrfs-progs.git] / backref.h
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_H__
20 #define __BTRFS_BACKREF_H__
21
22 #include "kernel-shared/ulist.h"
23 #include "extent_io.h"
24
25 struct inode_fs_paths {
26         struct btrfs_path               *btrfs_path;
27         struct btrfs_root               *fs_root;
28         struct btrfs_data_container     *fspath;
29 };
30
31 typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
32                 void *ctx);
33
34 int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
35                         struct btrfs_path *path);
36
37 int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
38                         struct btrfs_path *path, struct btrfs_key *found_key,
39                         u64 *flags);
40
41 int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
42                             struct btrfs_key *key, struct btrfs_extent_item *ei,
43                             u32 item_size, u64 *out_root, u8 *out_level);
44
45 int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
46                                 u64 extent_item_objectid,
47                                 u64 extent_offset, int search_commit_root,
48                                 iterate_extent_inodes_t *iterate, void *ctx);
49
50 int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
51                                 struct btrfs_path *path,
52                                 iterate_extent_inodes_t *iterate, void *ctx);
53
54 int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
55
56 int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
57                          struct btrfs_fs_info *fs_info, u64 bytenr,
58                          u64 time_seq, struct ulist **roots);
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);
63
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
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);
73 #endif