1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Copyright (C) 2011 STRATO.  All rights reserved.
 4 */
 5
 6#ifndef BTRFS_BACKREF_H
 7#define BTRFS_BACKREF_H
 8
 9#include <linux/btrfs.h>
10#include "ulist.h"
11#include "extent_io.h"
12
13struct inode_fs_paths {
14	struct btrfs_path		*btrfs_path;
15	struct btrfs_root		*fs_root;
16	struct btrfs_data_container	*fspath;
17};
18
19typedef int (iterate_extent_inodes_t)(u64 inum, u64 offset, u64 root,
20		void *ctx);
21
22int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
23			struct btrfs_path *path, struct btrfs_key *found_key,
24			u64 *flags);
25
26int tree_backref_for_extent(unsigned long *ptr, struct extent_buffer *eb,
27			    struct btrfs_key *key, struct btrfs_extent_item *ei,
28			    u32 item_size, u64 *out_root, u8 *out_level);
29
30int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
31				u64 extent_item_objectid,
32				u64 extent_offset, int search_commit_root,
33				iterate_extent_inodes_t *iterate, void *ctx,
34				bool ignore_offset);
35
36int iterate_inodes_from_logical(u64 logical, struct btrfs_fs_info *fs_info,
37				struct btrfs_path *path,
38				iterate_extent_inodes_t *iterate, void *ctx,
39				bool ignore_offset);
40
41int paths_from_inode(u64 inum, struct inode_fs_paths *ipath);
42
43int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
44			 struct btrfs_fs_info *fs_info, u64 bytenr,
45			 u64 time_seq, struct ulist **roots, bool ignore_offset);
46char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
47			u32 name_len, unsigned long name_off,
48			struct extent_buffer *eb_in, u64 parent,
49			char *dest, u32 size);
50
51struct btrfs_data_container *init_data_container(u32 total_bytes);
52struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
53					struct btrfs_path *path);
54void free_ipath(struct inode_fs_paths *ipath);
55
56int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
57			  u64 start_off, struct btrfs_path *path,
58			  struct btrfs_inode_extref **ret_extref,
59			  u64 *found_off);
60int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr);
61
62int __init btrfs_prelim_ref_init(void);
63void __cold btrfs_prelim_ref_exit(void);
64
65struct prelim_ref {
66	struct rb_node rbnode;
67	u64 root_id;
68	struct btrfs_key key_for_search;
69	int level;
70	int count;
71	struct extent_inode_elem *inode_list;
72	u64 parent;
73	u64 wanted_disk_byte;
74};
75
76#endif