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 "ioctl.h"
23#include "ulist.h"
24
25#define BTRFS_BACKREF_SEARCH_COMMIT_ROOT ((struct btrfs_trans_handle *)0)
26
27struct inode_fs_paths {
28	struct btrfs_path		*btrfs_path;
29	struct btrfs_root		*fs_root;
30	struct btrfs_data_container	*fspath;
31};
32
33typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
34		void *ctx);
35typedef int (iterate_irefs_t)(u64 parent, struct btrfs_inode_ref *iref,
36				struct extent_buffer *eb, void *ctx);
37
38int inode_item_info(u64 inum, u64 ioff, struct btrfs_root *fs_root,
39			struct btrfs_path *path);
40
41int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
42			struct btrfs_path *path, struct btrfs_key *found_key);
43
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,
49				u64 extent_item_objectid,
50				u64 extent_offset, int search_commit_root,
51				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
59int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
60				struct btrfs_fs_info *fs_info, u64 bytenr,
61				u64 delayed_ref_seq, u64 time_seq,
62				struct ulist **roots);
63
64struct btrfs_data_container *init_data_container(u32 total_bytes);
65struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
66					struct btrfs_path *path);
67void free_ipath(struct inode_fs_paths *ipath);
68
69#endif