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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
Jan Schmidt7a3ae2f2012-03-23 17:32:28 +010026#define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0)
27
Jan Schmidta542ad12011-06-13 19:52:59 +020028struct inode_fs_paths {
29 struct btrfs_path *btrfs_path;
30 struct btrfs_root *fs_root;
31 struct btrfs_data_container *fspath;
32};
33
34typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
35 void *ctx);
Jan Schmidta542ad12011-06-13 19:52:59 +020036
37int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
38 struct btrfs_path *path);
39
40int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
Liu Bo69917e42012-09-07 20:01:28 -060041 struct btrfs_path *path, struct btrfs_key *found_key,
42 u64 *flags);
Jan Schmidta542ad12011-06-13 19:52:59 +020043
44int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
45 struct btrfs_extent_item *ei, u32 item_size,
46 u64 *out_root, u8 *out_level);
47
48int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
Jan Schmidta542ad12011-06-13 19:52:59 +020049 u64 extent_item_objectid,
Jan Schmidt7a3ae2f2012-03-23 17:32:28 +010050 u64 extent_offset, int search_commit_root,
Jan Schmidta542ad12011-06-13 19:52:59 +020051 iterate_extent_inodes_t *iterate, void *ctx);
52
53int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
54 struct btrfs_path *path,
55 iterate_extent_inodes_t *iterate, void *ctx);
56
57int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
58
Jan Schmidt8da6d582011-11-23 18:55:04 +010059int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
60 struct btrfs_fs_info *fs_info, u64 bytenr,
Jan Schmidt097b8a72012-06-21 11:08:04 +020061 u64 time_seq, struct ulist **roots);
Alexander Block91cb9162012-06-03 14:23:23 +020062char *btrfs_iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
63 struct btrfs_inode_ref *iref, struct extent_buffer *eb,
64 u64 parent, char *dest, u32 size);
Jan Schmidt96b5bd72012-10-15 08:30:45 +000065char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
66 u32 name_len, unsigned long name_off,
67 struct extent_buffer *eb_in, u64 parent,
68 char *dest, u32 size);
Jan Schmidt8da6d582011-11-23 18:55:04 +010069
Jan Schmidta542ad12011-06-13 19:52:59 +020070struct btrfs_data_container *init_data_container(u32 total_bytes);
71struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
72 struct btrfs_path *path);
73void free_ipath(struct inode_fs_paths *ipath);
74
Mark Fashehf1863732012-08-08 11:32:27 -070075int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
76 u64 start_off, struct btrfs_path *path,
77 struct btrfs_inode_extref **ret_extref,
78 u64 *found_off);
79
Jan Schmidta542ad12011-06-13 19:52:59 +020080#endif