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 12 struct extent_buffer; 13 struct btrfs_chunk; 14 struct btrfs_key; 15 16 /* All the extra info needed to verify the parentness of a tree block. */ 17 struct 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 45 enum 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 */ 62 enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf); 63 enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node); 64 65 int btrfs_check_leaf(struct extent_buffer *leaf); 66 int btrfs_check_node(struct extent_buffer *node); 67 68 int btrfs_check_chunk_valid(struct extent_buffer *leaf, 69 struct btrfs_chunk *chunk, u64 logical); 70 int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner); 71 int btrfs_verify_level_key(struct extent_buffer *eb, int level, 72 struct btrfs_key *first_key, u64 parent_transid); 73 74 #endif 75