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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 /* _LE_TYPES */
/* node types */
enum {
CHFS_NODETYPE_VNODE = 1, /* vnode information */
CHFS_NODETYPE_DATA, /* data node */
CHFS_NODETYPE_DIRENT, /* directory enrty */
CHFS_NODETYPE_PADDING, /* padding node */
};
#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
*/
struct chfs_flash_node_hdr
{
le16 magic; /* filesystem magic */
le16 type; /* node type */
le32 length; /* length of node */
le32 hdr_crc; /* crc of the first 3 fields */
} __packed;
/* struct chfs_flash_vnode - vnode informations stored on flash */
struct chfs_flash_vnode
{
le16 magic; /* filesystem magic */
le16 type; /* node type (should be CHFS_NODETYPE_VNODE) */
le32 length; /* length of node */
le32 hdr_crc; /* crc of the first 3 fields */
le64 vno; /* vnode number */
le64 version; /* version of node */
le32 uid; /* owner of file */
le32 gid; /* group of file */
le32 mode; /* permission of vnode */
le32 dn_size; /* size of written data */
le32 atime; /* last access time */
le32 mtime; /* last modification time */
le32 ctime; /* change time */
le32 dsize; /* NOT USED, backward compatibility */
le32 node_crc; /* crc of all the previous fields */
} __packed;
/* struct chfs_flash_data_node - data stored on flash */
struct chfs_flash_data_node
{
le16 magic; /* filesystem magic */
le16 type; /* node type (should be CHFS_NODETYPE_DATA) */
le32 length; /* length of vnode with data */
le32 hdr_crc; /* crc of the first 3 fields */
le64 vno; /* vnode number */
le64 version; /* version of node */
le64 offset; /* offset in the file */
le32 data_length; /* length of data */
le32 data_crc; /* crc of data*/
le32 node_crc; /* crc of full node */
uint8_t data[0]; /* data */
} __packed;
/*
* struct chfs_flash_dirent_node -
* directory entry information stored on flash
*/
struct chfs_flash_dirent_node
{
le16 magic; /* filesystem magic */
le16 type; /* node type (should be CHFS_NODETYPE_DIRENT) */
le32 length; /* length of node with name */
le32 hdr_crc; /* crc of the first 3 fields */
le64 vno; /* vnode number */
le64 pvno; /* parent's vnode number */
le64 version; /* version of node */
le32 mctime; /* */
uint8_t nsize; /* length of name */
uint8_t dtype; /* file type */
uint8_t unused[2]; /* just for padding */
le32 name_crc; /* crc of name */
le32 node_crc; /* crc of full node */
uint8_t name[0]; /* name of directory entry */
} __packed;
/* struct chfs_flash_padding_node - spaceholder node on flash */
struct chfs_flash_padding_node
{
le16 magic; /* filesystem magic */
le16 type; /* node type (should be CHFS_NODETYPE_PADDING )*/
le32 length; /* length of node */
le32 hdr_crc; /* crc of the first 3 fields */
} __packed;
#endif /* __CHFS_MEDIA_H__ */
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