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		struct ulist *roots, struct ulist *tmp_ulist);
62
63int __init btrfs_prelim_ref_init(void);
64void __cold btrfs_prelim_ref_exit(void);
65
66struct prelim_ref {
67	struct rb_node rbnode;
68	u64 root_id;
69	struct btrfs_key key_for_search;
70	int level;
71	int count;
72	struct extent_inode_elem *inode_list;
73	u64 parent;
74	u64 wanted_disk_byte;
75};
76
77#endif

 
 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