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
22#include <linux/btrfs.h>
23#include "ulist.h"
24#include "extent_io.h"
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);
34
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,
39			struct btrfs_path *path, struct btrfs_key *found_key,
40			u64 *flags);
41
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,
47				u64 extent_item_objectid,
48				u64 extent_offset, int search_commit_root,
49				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
57int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
58				struct btrfs_fs_info *fs_info, u64 bytenr,
59				u64 time_seq, struct ulist **roots);
60char *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);
64
65struct 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
70int 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
75int __init btrfs_prelim_ref_init(void);
76void btrfs_prelim_ref_exit(void);
77#endif