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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) Qu Wenruo 2017. All rights reserved.
*/
#ifndef BTRFS_TREE_CHECKER_H
#define BTRFS_TREE_CHECKER_H
#include <uapi/linux/btrfs_tree.h>
struct extent_buffer;
struct btrfs_chunk;
/* All the extra info needed to verify the parentness of a tree block. */
struct btrfs_tree_parent_check {
/*
* The owner check against the tree block.
*
* Can be 0 to skip the owner check.
*/
u64 owner_root;
/*
* Expected transid, can be 0 to skip the check, but such skip
* should only be utilized for backref walk related code.
*/
u64 transid;
/*
* The expected first key.
*
* This check can be skipped if @has_first_key is false, such skip
* can happen for case where we don't have the parent node key,
* e.g. reading the tree root, doing backref walk.
*/
struct btrfs_key first_key;
bool has_first_key;
/* The expected level. Should always be set. */
u8 level;
};
enum btrfs_tree_block_status {
BTRFS_TREE_BLOCK_CLEAN,
BTRFS_TREE_BLOCK_INVALID_NRITEMS,
BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
BTRFS_TREE_BLOCK_INVALID_LEVEL,
BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
BTRFS_TREE_BLOCK_INVALID_OFFSETS,
BTRFS_TREE_BLOCK_INVALID_BLOCKPTR,
BTRFS_TREE_BLOCK_INVALID_ITEM,
BTRFS_TREE_BLOCK_INVALID_OWNER,
};
/*
* Exported simply for btrfs-progs which wants to have the
* btrfs_tree_block_status return codes.
*/
enum btrfs_tree_block_status __btrfs_check_leaf(struct extent_buffer *leaf);
enum btrfs_tree_block_status __btrfs_check_node(struct extent_buffer *node);
int btrfs_check_leaf(struct extent_buffer *leaf);
int btrfs_check_node(struct extent_buffer *node);
int btrfs_check_chunk_valid(struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 logical);
int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner);
int btrfs_verify_level_key(struct extent_buffer *eb, int level,
struct btrfs_key *first_key, u64 parent_transid);
#endif
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