/* btrfs.c - B-tree file system.  */
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2010,2011,2012,2013  Free Software Foundation, Inc.
 *
 *  GRUB is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef GRUB_BTRFS_H
#define GRUB_BTRFS_H	1

#include <grub/types.h>

enum
{
	GRUB_BTRFS_ITEM_TYPE_INODE_ITEM = 0x01,
	GRUB_BTRFS_ITEM_TYPE_INODE_REF = 0x0c,
	GRUB_BTRFS_ITEM_TYPE_DIR_ITEM = 0x54,
	GRUB_BTRFS_ITEM_TYPE_EXTENT_ITEM = 0x6c,
	GRUB_BTRFS_ITEM_TYPE_ROOT_ITEM = 0x84,
	GRUB_BTRFS_ITEM_TYPE_ROOT_BACKREF = 0x90,
	GRUB_BTRFS_ITEM_TYPE_DEVICE = 0xd8,
	GRUB_BTRFS_ITEM_TYPE_CHUNK = 0xe4
};

enum
{
	GRUB_BTRFS_ROOT_VOL_OBJECTID = 5,
	GRUB_BTRFS_TREE_ROOT_OBJECTID = 0x100,
};

struct grub_btrfs_root_item
{
	grub_uint8_t dummy[0xb0];
	grub_uint64_t tree;
	grub_uint64_t inode;
};

GRUB_PACKED_START
struct grub_btrfs_key
{
	grub_uint64_t object_id;
	grub_uint8_t type;
	grub_uint64_t offset;
};
GRUB_PACKED_END

struct grub_btrfs_root_backref
{
	grub_uint64_t inode_id;
	grub_uint64_t seqnr;
	grub_uint16_t n;
	char name[0];
};

struct grub_btrfs_inode_ref
{
	grub_uint64_t idxid;
	grub_uint16_t n;
	char name[0];
};

#endif
