#ifndef SQUASHFS_FS
  #define SQUASHFS_FS
  /*
   * Squashfs
   *
   * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008

   * Phillip Lougher <phillip@squashfs.org.uk>

   *
   * This program 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 2,
   * or (at your option) any later version.
   *
   * This program 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 this program; if not, write to the Free Software
   * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   *
   * squashfs_fs.h
   */
  
  #define SQUASHFS_CACHED_FRAGMENTS	CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
  #define SQUASHFS_MAJOR			4
  #define SQUASHFS_MINOR			0

  #define SQUASHFS_START			0
  
  /* size of metadata (inode and directory) blocks */
  #define SQUASHFS_METADATA_SIZE		8192
  #define SQUASHFS_METADATA_LOG		13
  
  /* default size of data blocks */
  #define SQUASHFS_FILE_SIZE		131072
  #define SQUASHFS_FILE_LOG		17

  /* default size of block device I/O */
  #ifdef CONFIG_SQUASHFS_4K_DEVBLK_SIZE
  #define SQUASHFS_DEVBLK_SIZE 4096
  #else
  #define SQUASHFS_DEVBLK_SIZE 1024
  #endif

  #define SQUASHFS_FILE_MAX_SIZE		1048576
  #define SQUASHFS_FILE_MAX_LOG		20
  
  /* Max number of uids and gids */
  #define SQUASHFS_IDS			65536
  
  /* Max length of filename (not 255) */
  #define SQUASHFS_NAME_LEN		256
  
  #define SQUASHFS_INVALID_FRAG		(0xffffffffU)

  #define SQUASHFS_INVALID_XATTR		(0xffffffffU)

  #define SQUASHFS_INVALID_BLK		(-1LL)
  
  /* Filesystem flags */
  #define SQUASHFS_NOI			0
  #define SQUASHFS_NOD			1
  #define SQUASHFS_NOF			3
  #define SQUASHFS_NO_FRAG		4
  #define SQUASHFS_ALWAYS_FRAG		5
  #define SQUASHFS_DUPLICATE		6
  #define SQUASHFS_EXPORT			7

  #define SQUASHFS_COMP_OPT		10

  
  #define SQUASHFS_BIT(flag, bit)		((flag >> bit) & 1)
  
  #define SQUASHFS_UNCOMPRESSED_INODES(flags)	SQUASHFS_BIT(flags, \
  						SQUASHFS_NOI)
  
  #define SQUASHFS_UNCOMPRESSED_DATA(flags)	SQUASHFS_BIT(flags, \
  						SQUASHFS_NOD)
  
  #define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags)	SQUASHFS_BIT(flags, \
  						SQUASHFS_NOF)
  
  #define SQUASHFS_NO_FRAGMENTS(flags)		SQUASHFS_BIT(flags, \
  						SQUASHFS_NO_FRAG)
  
  #define SQUASHFS_ALWAYS_FRAGMENTS(flags)	SQUASHFS_BIT(flags, \
  						SQUASHFS_ALWAYS_FRAG)
  
  #define SQUASHFS_DUPLICATES(flags)		SQUASHFS_BIT(flags, \
  						SQUASHFS_DUPLICATE)
  
  #define SQUASHFS_EXPORTABLE(flags)		SQUASHFS_BIT(flags, \
  						SQUASHFS_EXPORT)

  #define SQUASHFS_COMP_OPTS(flags)		SQUASHFS_BIT(flags, \
  						SQUASHFS_COMP_OPT)

  /* Max number of types and file types */
  #define SQUASHFS_DIR_TYPE		1
  #define SQUASHFS_REG_TYPE		2
  #define SQUASHFS_SYMLINK_TYPE		3
  #define SQUASHFS_BLKDEV_TYPE		4
  #define SQUASHFS_CHRDEV_TYPE		5
  #define SQUASHFS_FIFO_TYPE		6
  #define SQUASHFS_SOCKET_TYPE		7
  #define SQUASHFS_LDIR_TYPE		8
  #define SQUASHFS_LREG_TYPE		9
  #define SQUASHFS_LSYMLINK_TYPE		10
  #define SQUASHFS_LBLKDEV_TYPE		11
  #define SQUASHFS_LCHRDEV_TYPE		12
  #define SQUASHFS_LFIFO_TYPE		13
  #define SQUASHFS_LSOCKET_TYPE		14

  /* Xattr types */
  #define SQUASHFS_XATTR_USER             0
  #define SQUASHFS_XATTR_TRUSTED          1
  #define SQUASHFS_XATTR_SECURITY         2
  #define SQUASHFS_XATTR_VALUE_OOL        256
  #define SQUASHFS_XATTR_PREFIX_MASK      0xff

  /* Flag whether block is compressed or uncompressed, bit is set if block is
   * uncompressed */
  #define SQUASHFS_COMPRESSED_BIT		(1 << 15)
  
  #define SQUASHFS_COMPRESSED_SIZE(B)	(((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
  		(B) & ~SQUASHFS_COMPRESSED_BIT :  SQUASHFS_COMPRESSED_BIT)
  
  #define SQUASHFS_COMPRESSED(B)		(!((B) & SQUASHFS_COMPRESSED_BIT))
  
  #define SQUASHFS_COMPRESSED_BIT_BLOCK	(1 << 24)
  
  #define SQUASHFS_COMPRESSED_SIZE_BLOCK(B)	((B) & \
  						~SQUASHFS_COMPRESSED_BIT_BLOCK)
  
  #define SQUASHFS_COMPRESSED_BLOCK(B)	(!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
  
  /*
   * Inode number ops.  Inodes consist of a compressed block number, and an
   * uncompressed offset within that block
   */
  #define SQUASHFS_INODE_BLK(A)		((unsigned int) ((A) >> 16))
  
  #define SQUASHFS_INODE_OFFSET(A)	((unsigned int) ((A) & 0xffff))
  
  #define SQUASHFS_MKINODE(A, B)		((long long)(((long long) (A)\
  					<< 16) + (B)))
  
  /* Translate between VFS mode and squashfs mode */
  #define SQUASHFS_MODE(A)		((A) & 0xfff)
  
  /* fragment and fragment table defines */
  #define SQUASHFS_FRAGMENT_BYTES(A)	\
  				((A) * sizeof(struct squashfs_fragment_entry))
  
  #define SQUASHFS_FRAGMENT_INDEX(A)	(SQUASHFS_FRAGMENT_BYTES(A) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_FRAGMENT_INDEX_OFFSET(A)	(SQUASHFS_FRAGMENT_BYTES(A) % \
  						SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_FRAGMENT_INDEXES(A)	((SQUASHFS_FRAGMENT_BYTES(A) + \
  					SQUASHFS_METADATA_SIZE - 1) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_FRAGMENT_INDEX_BYTES(A)	(SQUASHFS_FRAGMENT_INDEXES(A) *\
  						sizeof(u64))
  
  /* inode lookup table defines */
  #define SQUASHFS_LOOKUP_BYTES(A)	((A) * sizeof(u64))
  
  #define SQUASHFS_LOOKUP_BLOCK(A)	(SQUASHFS_LOOKUP_BYTES(A) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_LOOKUP_BLOCK_OFFSET(A)	(SQUASHFS_LOOKUP_BYTES(A) % \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_LOOKUP_BLOCKS(A)	((SQUASHFS_LOOKUP_BYTES(A) + \
  					SQUASHFS_METADATA_SIZE - 1) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_LOOKUP_BLOCK_BYTES(A)	(SQUASHFS_LOOKUP_BLOCKS(A) *\
  					sizeof(u64))
  
  /* uid/gid lookup table defines */
  #define SQUASHFS_ID_BYTES(A)		((A) * sizeof(unsigned int))
  
  #define SQUASHFS_ID_BLOCK(A)		(SQUASHFS_ID_BYTES(A) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_ID_BLOCK_OFFSET(A)	(SQUASHFS_ID_BYTES(A) % \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_ID_BLOCKS(A)		((SQUASHFS_ID_BYTES(A) + \
  					SQUASHFS_METADATA_SIZE - 1) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_ID_BLOCK_BYTES(A)	(SQUASHFS_ID_BLOCKS(A) *\
  					sizeof(u64))

  /* xattr id lookup table defines */
  #define SQUASHFS_XATTR_BYTES(A)		((A) * sizeof(struct squashfs_xattr_id))
  
  #define SQUASHFS_XATTR_BLOCK(A)		(SQUASHFS_XATTR_BYTES(A) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_XATTR_BLOCK_OFFSET(A)	(SQUASHFS_XATTR_BYTES(A) % \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_XATTR_BLOCKS(A)	((SQUASHFS_XATTR_BYTES(A) + \
  					SQUASHFS_METADATA_SIZE - 1) / \
  					SQUASHFS_METADATA_SIZE)
  
  #define SQUASHFS_XATTR_BLOCK_BYTES(A)	(SQUASHFS_XATTR_BLOCKS(A) *\
  					sizeof(u64))
  #define SQUASHFS_XATTR_BLK(A)		((unsigned int) ((A) >> 16))
  
  #define SQUASHFS_XATTR_OFFSET(A)	((unsigned int) ((A) & 0xffff))

  
  /* cached data constants for filesystem */
  #define SQUASHFS_CACHED_BLKS		8
  
  #define SQUASHFS_MAX_FILE_SIZE_LOG	64
  
  #define SQUASHFS_MAX_FILE_SIZE		(1LL << \
  					(SQUASHFS_MAX_FILE_SIZE_LOG - 2))

  /* meta index cache */
  #define SQUASHFS_META_INDEXES	(SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
  #define SQUASHFS_META_ENTRIES	127
  #define SQUASHFS_META_SLOTS	8
  
  struct meta_entry {
  	u64			data_block;
  	unsigned int		index_block;
  	unsigned short		offset;
  	unsigned short		pad;
  };
  
  struct meta_index {
  	unsigned int		inode_number;
  	unsigned int		offset;
  	unsigned short		entries;
  	unsigned short		skip;
  	unsigned short		locked;
  	unsigned short		pad;
  	struct meta_entry	meta_entry[SQUASHFS_META_ENTRIES];
  };
  
  
  /*
   * definitions for structures on disk
   */

  #define ZLIB_COMPRESSION	1
  #define LZMA_COMPRESSION	2
  #define LZO_COMPRESSION		3

  #define XZ_COMPRESSION		4

  
  struct squashfs_super_block {
  	__le32			s_magic;
  	__le32			inodes;
  	__le32			mkfs_time;
  	__le32			block_size;
  	__le32			fragments;
  	__le16			compression;
  	__le16			block_log;
  	__le16			flags;
  	__le16			no_ids;
  	__le16			s_major;
  	__le16			s_minor;
  	__le64			root_inode;
  	__le64			bytes_used;
  	__le64			id_table_start;

  	__le64			xattr_id_table_start;

  	__le64			inode_table_start;
  	__le64			directory_table_start;
  	__le64			fragment_table_start;
  	__le64			lookup_table_start;
  };
  
  struct squashfs_dir_index {
  	__le32			index;
  	__le32			start_block;
  	__le32			size;
  	unsigned char		name[0];
  };
  
  struct squashfs_base_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  };
  
  struct squashfs_ipc_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			nlink;
  };

  struct squashfs_lipc_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			nlink;
  	__le32			xattr;
  };

  struct squashfs_dev_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			nlink;
  	__le32			rdev;
  };

  struct squashfs_ldev_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			nlink;
  	__le32			rdev;
  	__le32			xattr;
  };

  struct squashfs_symlink_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			nlink;
  	__le32			symlink_size;
  	char			symlink[0];
  };
  
  struct squashfs_reg_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			start_block;
  	__le32			fragment;
  	__le32			offset;
  	__le32			file_size;
  	__le16			block_list[0];
  };
  
  struct squashfs_lreg_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le64			start_block;
  	__le64			file_size;
  	__le64			sparse;
  	__le32			nlink;
  	__le32			fragment;
  	__le32			offset;
  	__le32			xattr;
  	__le16			block_list[0];
  };
  
  struct squashfs_dir_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			start_block;
  	__le32			nlink;
  	__le16			file_size;
  	__le16			offset;
  	__le32			parent_inode;
  };
  
  struct squashfs_ldir_inode {
  	__le16			inode_type;
  	__le16			mode;
  	__le16			uid;
  	__le16			guid;
  	__le32			mtime;

  	__le32			inode_number;

  	__le32			nlink;
  	__le32			file_size;
  	__le32			start_block;
  	__le32			parent_inode;
  	__le16			i_count;
  	__le16			offset;
  	__le32			xattr;
  	struct squashfs_dir_index	index[0];
  };
  
  union squashfs_inode {
  	struct squashfs_base_inode		base;
  	struct squashfs_dev_inode		dev;

  	struct squashfs_ldev_inode		ldev;

  	struct squashfs_symlink_inode		symlink;
  	struct squashfs_reg_inode		reg;
  	struct squashfs_lreg_inode		lreg;
  	struct squashfs_dir_inode		dir;
  	struct squashfs_ldir_inode		ldir;
  	struct squashfs_ipc_inode		ipc;

  	struct squashfs_lipc_inode		lipc;

  };
  
  struct squashfs_dir_entry {
  	__le16			offset;
  	__le16			inode_number;
  	__le16			type;
  	__le16			size;
  	char			name[0];
  };
  
  struct squashfs_dir_header {
  	__le32			count;
  	__le32			start_block;
  	__le32			inode_number;
  };
  
  struct squashfs_fragment_entry {
  	__le64			start_block;
  	__le32			size;
  	unsigned int		unused;
  };

  struct squashfs_xattr_entry {
  	__le16			type;
  	__le16			size;
  	char			data[0];
  };
  
  struct squashfs_xattr_val {
  	__le32			vsize;
  	char			value[0];
  };

  struct squashfs_xattr_id {
  	__le64			xattr;
  	__le32			count;
  	__le32			size;
  };
  
  struct squashfs_xattr_id_table {
  	__le64			xattr_table_start;
  	__le32			xattr_ids;
  	__le32			unused;
  };

  #endif