| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * Copyright (C) Qu Wenruo 2017. All rights reserved. |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef BTRFS_TREE_CHECKER_H |
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| 7 | #define BTRFS_TREE_CHECKER_H |
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| 8 | |
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| 9 | #include <uapi/linux/btrfs_tree.h> |
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| 10 | |
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| 11 | struct extent_buffer; |
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| 12 | struct btrfs_chunk; |
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| 13 | |
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| 14 | /* All the extra info needed to verify the parentness of a tree block. */ |
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| 15 | struct btrfs_tree_parent_check { |
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| 16 | /* |
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| 17 | * The owner check against the tree block. |
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| 18 | * |
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| 19 | * Can be 0 to skip the owner check. |
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| 20 | */ |
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| 21 | u64 owner_root; |
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| 22 | |
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| 23 | /* |
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| 24 | * Expected transid, can be 0 to skip the check, but such skip |
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| 25 | * should only be utlized for backref walk related code. |
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| 26 | */ |
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| 27 | u64 transid; |
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| 28 | |
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| 29 | /* |
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| 30 | * The expected first key. |
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| 31 | * |
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| 32 | * This check can be skipped if @has_first_key is false, such skip |
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| 33 | * can happen for case where we don't have the parent node key, |
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| 34 | * e.g. reading the tree root, doing backref walk. |
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| 35 | */ |
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| 36 | struct btrfs_key first_key; |
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| 37 | bool has_first_key; |
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| 38 | |
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| 39 | /* The expected level. Should always be set. */ |
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| 40 | u8 level; |
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| 41 | }; |
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| 42 | |
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| 43 | enum btrfs_tree_block_status { |
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| 44 | BTRFS_TREE_BLOCK_CLEAN, |
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| 45 | BTRFS_TREE_BLOCK_INVALID_NRITEMS, |
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| 46 | BTRFS_TREE_BLOCK_INVALID_PARENT_KEY, |
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| 47 | BTRFS_TREE_BLOCK_BAD_KEY_ORDER, |
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| 48 | BTRFS_TREE_BLOCK_INVALID_LEVEL, |
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| 49 | BTRFS_TREE_BLOCK_INVALID_FREE_SPACE, |
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| 50 | BTRFS_TREE_BLOCK_INVALID_OFFSETS, |
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| 51 | BTRFS_TREE_BLOCK_INVALID_BLOCKPTR, |
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| 52 | BTRFS_TREE_BLOCK_INVALID_ITEM, |
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| 53 | BTRFS_TREE_BLOCK_INVALID_OWNER, |
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| 54 | }; |
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| 55 | |
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| 56 | /* |
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| 57 | * Exported simply for btrfs-progs which wants to have the |
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| 58 | * btrfs_tree_block_status return codes. |
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| 59 | */ |
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| 60 | enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf); |
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| 61 | enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node); |
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| 62 | |
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| 63 | int btrfs_check_leaf(struct extent_buffer *leaf); |
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| 64 | int btrfs_check_node(struct extent_buffer *node); |
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| 65 | |
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| 66 | int btrfs_check_chunk_valid(struct extent_buffer *leaf, |
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| 67 | struct btrfs_chunk *chunk, u64 logical); |
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| 68 | int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner); |
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| 69 | int btrfs_verify_level_key(struct extent_buffer *eb, int level, |
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| 70 | struct btrfs_key *first_key, u64 parent_transid); |
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| 71 | |
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| 72 | #endif |
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| 73 | |
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