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Jan Schmidta542ad12011-06-13 19:52:59 +02001/*
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
Filipe Brandenburger55e301f2013-01-29 06:04:50 +000022#include <linux/btrfs.h>
Jan Schmidt8da6d582011-11-23 18:55:04 +010023#include "ulist.h"
Alexander Block91cb9162012-06-03 14:23:23 +020024#include "extent_io.h"
Jan Schmidta542ad12011-06-13 19:52:59 +020025
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);
Jan Schmidta542ad12011-06-13 19:52:59 +020034
35int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
36 struct btrfs_path *path);
37
38int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
Liu Bo69917e42012-09-07 20:01:28 -060039 struct btrfs_path *path, struct btrfs_key *found_key,
40 u64 *flags);
Jan Schmidta542ad12011-06-13 19:52:59 +020041
42int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
43 struct btrfs_extent_item *ei, u32 item_size,
44 u64 *out_root, u8 *out_level);
45
46int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
Jan Schmidta542ad12011-06-13 19:52:59 +020047 u64 extent_item_objectid,
Jan Schmidt7a3ae2f2012-03-23 17:32:28 +010048 u64 extent_offset, int search_commit_root,
Jan Schmidta542ad12011-06-13 19:52:59 +020049 iterate_extent_inodes_t *iterate, void *ctx);
50
51int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
52 struct btrfs_path *path,
53 iterate_extent_inodes_t *iterate, void *ctx);
54
55int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
56
Jan Schmidt8da6d582011-11-23 18:55:04 +010057int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
58 struct btrfs_fs_info *fs_info, u64 bytenr,
Jan Schmidt097b8a72012-06-21 11:08:04 +020059 u64 time_seq, struct ulist **roots);
Jan Schmidt96b5bd72012-10-15 08:30:45 +000060char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
61 u32 name_len, unsigned long name_off,
62 struct extent_buffer *eb_in, u64 parent,
63 char *dest, u32 size);
Jan Schmidt8da6d582011-11-23 18:55:04 +010064
Jan Schmidta542ad12011-06-13 19:52:59 +020065struct btrfs_data_container *init_data_container(u32 total_bytes);
66struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
67 struct btrfs_path *path);
68void free_ipath(struct inode_fs_paths *ipath);
69
Mark Fashehf1863732012-08-08 11:32:27 -070070int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
71 u64 start_off, struct btrfs_path *path,
72 struct btrfs_inode_extref **ret_extref,
73 u64 *found_off);
74
Jan Schmidta542ad12011-06-13 19:52:59 +020075#endif