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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"
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25
26struct inode_fs_paths {
27 struct btrfs_path *btrfs_path;
28 struct btrfs_root *fs_root;
29 struct btrfs_data_container *fspath;
30};
31
32typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
33 void *ctx);
a542ad1b 34
a542ad1b 35int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
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36 struct btrfs_path *path, struct btrfs_key *found_key,
37 u64 *flags);
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38
39int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
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40 struct btrfs_key *key, struct btrfs_extent_item *ei,
41 u32 item_size, u64 *out_root, u8 *out_level);
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42
43int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
a542ad1b 44 u64 extent_item_objectid,
7a3ae2f8 45 u64 extent_offset, int search_commit_root,
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46 iterate_extent_inodes_t *iterate, void *ctx);
47
48int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
49 struct btrfs_path *path,
50 iterate_extent_inodes_t *iterate, void *ctx);
51
52int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
53
8da6d581 54int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
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55 struct btrfs_fs_info *fs_info, u64 bytenr,
56 u64 time_seq, struct ulist **roots);
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57char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
58 u32 name_len, unsigned long name_off,
59 struct extent_buffer *eb_in, u64 parent,
60 char *dest, u32 size);
8da6d581 61
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62struct btrfs_data_container *init_data_container(u32 total_bytes);
63struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
64 struct btrfs_path *path);
65void free_ipath(struct inode_fs_paths *ipath);
66
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67int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
68 u64 start_off, struct btrfs_path *path,
69 struct btrfs_inode_extref **ret_extref,
70 u64 *found_off);
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71int btrfs_check_shared(struct btrfs_trans_handle *trans,
72 struct btrfs_fs_info *fs_info, u64 root_objectid,
73 u64 inum, u64 bytenr);
f186373f 74
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75int __init btrfs_prelim_ref_init(void);
76void btrfs_prelim_ref_exit(void);
a542ad1b 77#endif