/* 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 <linux/types.h>
#include <uapi/linux/btrfs_tree.h>
struct extent_buffer;
struct btrfs_fs_info;
struct btrfs_chunk;
struct btrfs_key;
/* 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,
BTRFS_TREE_BLOCK_WRITTEN_NOT_SET,
};
/*
* 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(const struct btrfs_fs_info *fs_info,
const struct extent_buffer *leaf,
const struct btrfs_chunk *chunk, u64 logical,
u32 sectorsize);
int btrfs_check_eb_owner(const struct extent_buffer *eb, u64 root_owner);
int btrfs_verify_level_key(struct extent_buffer *eb,
const struct btrfs_tree_parent_check *check);
#endif
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