Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[platform/kernel/linux-starfive.git] / fs / btrfs / tree-checker.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) Qu Wenruo 2017.  All rights reserved.
4  */
5
6 #ifndef BTRFS_TREE_CHECKER_H
7 #define BTRFS_TREE_CHECKER_H
8
9 #include <uapi/linux/btrfs_tree.h>
10
11 struct extent_buffer;
12 struct btrfs_chunk;
13
14 /* All the extra info needed to verify the parentness of a tree block. */
15 struct btrfs_tree_parent_check {
16         /*
17          * The owner check against the tree block.
18          *
19          * Can be 0 to skip the owner check.
20          */
21         u64 owner_root;
22
23         /*
24          * Expected transid, can be 0 to skip the check, but such skip
25          * should only be utlized for backref walk related code.
26          */
27         u64 transid;
28
29         /*
30          * The expected first key.
31          *
32          * This check can be skipped if @has_first_key is false, such skip
33          * can happen for case where we don't have the parent node key,
34          * e.g. reading the tree root, doing backref walk.
35          */
36         struct btrfs_key first_key;
37         bool has_first_key;
38
39         /* The expected level. Should always be set. */
40         u8 level;
41 };
42
43 enum btrfs_tree_block_status {
44         BTRFS_TREE_BLOCK_CLEAN,
45         BTRFS_TREE_BLOCK_INVALID_NRITEMS,
46         BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
47         BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
48         BTRFS_TREE_BLOCK_INVALID_LEVEL,
49         BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
50         BTRFS_TREE_BLOCK_INVALID_OFFSETS,
51         BTRFS_TREE_BLOCK_INVALID_BLOCKPTR,
52         BTRFS_TREE_BLOCK_INVALID_ITEM,
53         BTRFS_TREE_BLOCK_INVALID_OWNER,
54 };
55
56 /*
57  * Exported simply for btrfs-progs which wants to have the
58  * btrfs_tree_block_status return codes.
59  */
60 enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf);
61 enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node);
62
63 int btrfs_check_leaf(struct extent_buffer *leaf);
64 int btrfs_check_node(struct extent_buffer *node);
65
66 int btrfs_check_chunk_valid(struct extent_buffer *leaf,
67                             struct btrfs_chunk *chunk, u64 logical);
68 int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner);
69 int btrfs_verify_level_key(struct extent_buffer *eb, int level,
70                            struct btrfs_key *first_key, u64 parent_transid);
71
72 #endif