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 73
