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-rw-r--r--fs/btrfs/tree-checker.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/fs/btrfs/tree-checker.h b/fs/btrfs/tree-checker.h
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+++ b/fs/btrfs/tree-checker.h
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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 utlized 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