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 <linux/types.h> 10#include <uapi/linux/btrfs_tree.h> 11 12struct extent_buffer; 13struct btrfs_chunk; 14struct btrfs_key; 15 16/* All the extra info needed to verify the parentness of a tree block. */ 17struct btrfs_tree_parent_check { 18 /* 19 * The owner check against the tree block. 20 * 21 * Can be 0 to skip the owner check. 22 */ 23 u64 owner_root; 24 25 /* 26 * Expected transid, can be 0 to skip the check, but such skip 27 * should only be utilized for backref walk related code. 28 */ 29 u64 transid; 30 31 /* 32 * The expected first key. 33 * 34 * This check can be skipped if @has_first_key is false, such skip 35 * can happen for case where we don't have the parent node key, 36 * e.g. reading the tree root, doing backref walk. 37 */ 38 struct btrfs_key first_key; 39 bool has_first_key; 40 41 /* The expected level. Should always be set. */ 42 u8 level; 43}; 44 45enum btrfs_tree_block_status { 46 BTRFS_TREE_BLOCK_CLEAN, 47 BTRFS_TREE_BLOCK_INVALID_NRITEMS, 48 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY, 49 BTRFS_TREE_BLOCK_BAD_KEY_ORDER, 50 BTRFS_TREE_BLOCK_INVALID_LEVEL, 51 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE, 52 BTRFS_TREE_BLOCK_INVALID_OFFSETS, 53 BTRFS_TREE_BLOCK_INVALID_BLOCKPTR, 54 BTRFS_TREE_BLOCK_INVALID_ITEM, 55 BTRFS_TREE_BLOCK_INVALID_OWNER, 56}; 57 58/* 59 * Exported simply for btrfs-progs which wants to have the 60 * btrfs_tree_block_status return codes. 61 */ 62enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf); 63enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node); 64 65int btrfs_check_leaf(struct extent_buffer *leaf); 66int btrfs_check_node(struct extent_buffer *node); 67 68int btrfs_check_chunk_valid(struct extent_buffer *leaf, 69 struct btrfs_chunk *chunk, u64 logical); 70int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner); 71int btrfs_verify_level_key(struct extent_buffer *eb, int level, 72 struct btrfs_key *first_key, u64 parent_transid); 73 74#endif 75