ctree.h

// SPDX-License-Identifier: MIT

#ifndef BTRFS_FUSE_CTREE_H
#define BTRFS_FUSE_CTREE_H

#include <pthread.h>
#include "accessors.h"
#include "libs/rbtree.h"
#include "libs/list.h"

#define BTRFS_UUID_UNPARSED_SIZE 37

struct btrfs_root {
	struct extent_buffer *node;
	struct btrfs_key root_key;
	struct btrfs_fs_info *fs_info;
	struct rb_node rb_node;

	/*
	 * Indicates the first inode number, which is also the inode for the
	 * subvolume root.
	 */
	u64 root_dirid;
};

/* Represents a btrfs filesystem */
struct btrfs_fs_info {
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
	u8 fsid[BTRFS_UUID_SIZE];

	struct btrfs_root *tree_root;
	struct btrfs_root *default_root;
	struct btrfs_root *chunk_root;
	struct btrfs_root *csum_root;

	/* Records all subvolume trees that are in use */
	struct rb_root subvols_root;

	/* Records logical->physical mappings */
	struct rb_root mapping_root;

	/* Recrods all extent_buffers */
	struct rb_root eb_root;
	pthread_mutex_t eb_lock;

	/* Cached generation, the same as superblock::generation */
	u64 generation;

	/* Cached basic sizes */
	u32 nodesize;
	u32 sectorsize;
	u16 csum_size;
	u16 csum_type;
	struct btrfs_fs_devices *fs_devices;
	struct btrfs_super_block super_copy;
};

#endif