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minix/sys/ufs/chfs/media.h
Ben Gras d65f6f7009 imported code harmonisation 
. common/include/arch/i386 is not actually an imported
	  sys/arch/i386/include but leftover Minix files;
	  remove and move to include/
	. move include/ufs to sys/ufs, where it came from, now that
	  we have a sys/ hierarchy
	. move mdocml/ to external/bsd/, now we have that
	. single sys/arch/i386/stand/ import for boot stuff
2012-03-14 16:02:59 +01:00

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/*-
* Copyright (c) 2010 Department of Software Engineering,
* University of Szeged, Hungary
* Copyright (C) 2009 Ferenc Havasi <havasi@inf.u-szeged.hu>
* Copyright (C) 2009 Zoltan Sogor <weth@inf.u-szeged.hu>
* Copyright (C) 2009 David Tengeri <dtengeri@inf.u-szeged.hu>
* Copyright (C) 2010 Adam Hoka <ahoka@NetBSD.org>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef __CHFS_MEDIA_H__
#define __CHFS_MEDIA_H__
#ifndef _LE_TYPES
#define _LE_TYPES
typedef uint16_t le16;
typedef uint32_t le32;
typedef uint64_t le64;
#endif
/*****************************************************************************/
/* File system specific structures */
/*****************************************************************************/
enum {
CHFS_NODETYPE_VNODE = 1,
CHFS_NODETYPE_DATA,
CHFS_NODETYPE_DIRENT,
CHFS_NODETYPE_PADDING,
};
//#define CHFS_NODE_HDR_SIZE 12 /* magic + type + length + hdr_crc */
#define CHFS_NODE_HDR_SIZE sizeof(struct chfs_flash_node_hdr)
/* Max size we have to read to get all info.
* It is max size of chfs_flash_dirent_node with max name length.
*/
#define CHFS_MAX_NODE_SIZE 299
/* This will identify CHfs nodes */
#define CHFS_FS_MAGIC_BITMASK 0x4AF1
/**
* struct chfs_flash_node_hdr - node header, its members are same for
* all nodes, used at scan
* @magic: filesystem magic
* @type: node type
* @length: length of node
* @hdr_crc: crc of the first 3 members
*/
struct chfs_flash_node_hdr
{
le16 magic;
le16 type;
le32 length;
le32 hdr_crc;
} __packed;
/**
* struct chfs_flash_vnode - vnode informations stored on flash
* @magic: filesystem magic
* @type: node type (CHFS_NODETYPE_VNODE)
* @length: length of node
* @hdr_crc: crc of the first 3 members
* @vno: vnode identifier id
* @version: vnode's version number
* @uid: owner of the file
* @gid: group of file
* @mode: permissions for vnode
* @dn_size: size of written out data nodes
* @atime: last access times
* @mtime: last modification time
* @ctime: change time
* @dsize: size of the node's data
* @node_crc: crc of full node
*/
struct chfs_flash_vnode
{
le16 magic; /*0 */
le16 type; /*2 */
le32 length; /*4 */
le32 hdr_crc; /*8 */
le64 vno; /*12*/
le64 version; /*20*/
le32 uid; /*28*/
le32 gid; /*32*/
le32 mode; /*36*/
le32 dn_size; /*40*/
le32 atime; /*44*/
le32 mtime; /*48*/
le32 ctime; /*52*/
le32 dsize; /*56*/
le32 node_crc; /*60*/
} __packed;
/**
* struct chfs_flash_data_node - node informations of data stored on flash
* @magic: filesystem magic
* @type: node type (CHFS_NODETYPE_DATA)
* @length: length of node with data
* @hdr_crc: crc of the first 3 members
* @vno: vnode identifier id
* @version: vnode's version number
* @offset: offset in the file where write begins
* @data_length: length of data
* @data_crc: crc of data
* @node_crc: crc of full node
* @data: array of data
*/
struct chfs_flash_data_node
{
le16 magic;
le16 type;
le32 length;
le32 hdr_crc;
le64 vno;
le64 version;
le64 offset;
le32 data_length;
le32 data_crc;
le32 node_crc;
uint8_t data[0];
} __packed;
/**
* struct chfs_flash_dirent_node - vnode informations stored on flash
* @magic: filesystem magic
* @type: node type (CHFS_NODETYPE_DIRENT)
* @length: length of node
* @hdr_crc: crc of the first 3 members
* @vno: vnode identifier id
* @pvno: vnode identifier id of parent vnode
* @version: vnode's version number
* @mctime:
* @nsize: length of name
* @dtype: file type
* @unused: just for padding
* @name_crc: crc of name
* @node_crc: crc of full node
* @name: name of the directory entry
*/
struct chfs_flash_dirent_node
{
le16 magic;
le16 type;
le32 length;
le32 hdr_crc;
le64 vno;
le64 pvno;
le64 version;
le32 mctime;
uint8_t nsize;
uint8_t dtype;
uint8_t unused[2];
le32 name_crc;
le32 node_crc;
uint8_t name[0];
} __packed;
/**
* struct chfs_flash_padding_node - node informations of data stored on
* flash
* @magic: filesystem magic
* @type: node type (CHFS_NODETYPE_PADDING)
* @length: length of node
* @hdr_crc: crc of the first 3 members
*/
struct chfs_flash_padding_node
{
le16 magic;
le16 type;
le32 length;
le32 hdr_crc;
} __packed;
#endif /* __CHFS_MEDIA_H__ */
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