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_fs_info; 14 struct btrfs_chunk; 15 struct btrfs_key; 16 17 /* All the extra info needed to verify the parentness of a tree block. */ 18 struct btrfs_tree_parent_check { 19 /* 20 * The owner check against the tree block. 21 * 22 * Can be 0 to skip the owner check. 23 */ 24 u64 owner_root; 25 26 /* 27 * Expected transid, can be 0 to skip the check, but such skip 28 * should only be utilized for backref walk related code. 29 */ 30 u64 transid; 31 32 /* 33 * The expected first key. 34 * 35 * This check can be skipped if @has_first_key is false, such skip 36 * can happen for case where we don't have the parent node key, 37 * e.g. reading the tree root, doing backref walk. 38 */ 39 struct btrfs_key first_key; 40 bool has_first_key; 41 42 /* The expected level. Should always be set. */ 43 u8 level; 44 }; 45 46 enum btrfs_tree_block_status { 47 BTRFS_TREE_BLOCK_CLEAN, 48 BTRFS_TREE_BLOCK_INVALID_NRITEMS, 49 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY, 50 BTRFS_TREE_BLOCK_BAD_KEY_ORDER, 51 BTRFS_TREE_BLOCK_INVALID_LEVEL, 52 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE, 53 BTRFS_TREE_BLOCK_INVALID_OFFSETS, 54 BTRFS_TREE_BLOCK_INVALID_BLOCKPTR, 55 BTRFS_TREE_BLOCK_INVALID_ITEM, 56 BTRFS_TREE_BLOCK_INVALID_OWNER, 57 BTRFS_TREE_BLOCK_WRITTEN_NOT_SET, 58 }; 59 60 /* 61 * Exported simply for btrfs-progs which wants to have the 62 * btrfs_tree_block_status return codes. 63 */ 64 enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf); 65 enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node); 66 67 int btrfs_check_leaf(struct extent_buffer *leaf); 68 int btrfs_check_node(struct extent_buffer *node); 69 70 int btrfs_check_chunk_valid(const struct btrfs_fs_info *fs_info, 71 const struct extent_buffer *leaf, 72 const struct btrfs_chunk *chunk, u64 logical, 73 u32 sectorsize); 74 int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner); 75 int btrfs_verify_level_key(struct extent_buffer *eb, 76 const struct btrfs_tree_parent_check *check); 77 78 #endif 79