media.h revision 1.1
1 /*- 2 * Copyright (c) 2010 Department of Software Engineering, 3 * University of Szeged, Hungary 4 * Copyright (C) 2009 Ferenc Havasi <havasi (at) inf.u-szeged.hu> 5 * Copyright (C) 2009 Zoltan Sogor <weth (at) inf.u-szeged.hu> 6 * Copyright (C) 2009 David Tengeri <dtengeri (at) inf.u-szeged.hu> 7 * Copyright (C) 2010 Adam Hoka <ahoka (at) NetBSD.org> 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by the Department of Software Engineering, University of Szeged, Hungary 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #ifndef __CHFS_MEDIA_H__ 36 #define __CHFS_MEDIA_H__ 37 38 #ifndef _LE_TYPES 39 #define _LE_TYPES 40 typedef uint16_t le16; 41 typedef uint32_t le32; 42 typedef uint64_t le64; 43 #endif 44 45 /*****************************************************************************/ 46 /* File system specific structures */ 47 /*****************************************************************************/ 48 49 enum { 50 CHFS_NODETYPE_VNODE = 1, 51 CHFS_NODETYPE_DATA, 52 CHFS_NODETYPE_DIRENT, 53 CHFS_NODETYPE_PADDING, 54 }; 55 56 //#define CHFS_NODE_HDR_SIZE 12 /* magic + type + length + hdr_crc */ 57 #define CHFS_NODE_HDR_SIZE sizeof(struct chfs_flash_node_hdr) 58 59 /* Max size we have to read to get all info. 60 * It is max size of chfs_flash_dirent_node with max name length. 61 */ 62 #define CHFS_MAX_NODE_SIZE 299 63 64 /* This will identify CHfs nodes */ 65 #define CHFS_FS_MAGIC_BITMASK 0x4AF1 66 67 /** 68 * struct chfs_flash_node_hdr - node header, its members are same for 69 * all nodes, used at scan 70 * @magic: filesystem magic 71 * @type: node type 72 * @length: length of node 73 * @hdr_crc: crc of the first 3 members 74 */ 75 struct chfs_flash_node_hdr 76 { 77 le16 magic; 78 le16 type; 79 le32 length; 80 le32 hdr_crc; 81 } __packed; 82 83 /** 84 * struct chfs_flash_vnode - vnode informations stored on flash 85 * @magic: filesystem magic 86 * @type: node type (CHFS_NODETYPE_VNODE) 87 * @length: length of node 88 * @hdr_crc: crc of the first 3 members 89 * @vno: vnode identifier id 90 * @version: vnode's version number 91 * @uid: owner of the file 92 * @gid: group of file 93 * @mode: permissions for vnode 94 * @dn_size: size of written out data nodes 95 * @atime: last access times 96 * @mtime: last modification time 97 * @ctime: change time 98 * @dsize: size of the node's data 99 * @node_crc: crc of full node 100 */ 101 struct chfs_flash_vnode 102 { 103 le16 magic; /*0 */ 104 le16 type; /*2 */ 105 le32 length; /*4 */ 106 le32 hdr_crc; /*8 */ 107 le64 vno; /*12*/ 108 le64 version; /*20*/ 109 le32 uid; /*28*/ 110 le32 gid; /*32*/ 111 le32 mode; /*36*/ 112 le32 dn_size; /*40*/ 113 le32 atime; /*44*/ 114 le32 mtime; /*48*/ 115 le32 ctime; /*52*/ 116 le32 dsize; /*56*/ 117 le32 node_crc; /*60*/ 118 } __packed; 119 120 /** 121 * struct chfs_flash_data_node - node informations of data stored on flash 122 * @magic: filesystem magic 123 * @type: node type (CHFS_NODETYPE_DATA) 124 * @length: length of node with data 125 * @hdr_crc: crc of the first 3 members 126 * @vno: vnode identifier id 127 * @version: vnode's version number 128 * @offset: offset in the file where write begins 129 * @data_length: length of data 130 * @data_crc: crc of data 131 * @node_crc: crc of full node 132 * @data: array of data 133 */ 134 struct chfs_flash_data_node 135 { 136 le16 magic; 137 le16 type; 138 le32 length; 139 le32 hdr_crc; 140 le64 vno; 141 le64 version; 142 le64 offset; 143 le32 data_length; 144 le32 data_crc; 145 le32 node_crc; 146 uint8_t data[0]; 147 } __packed; 148 149 /** 150 * struct chfs_flash_dirent_node - vnode informations stored on flash 151 * @magic: filesystem magic 152 * @type: node type (CHFS_NODETYPE_DIRENT) 153 * @length: length of node 154 * @hdr_crc: crc of the first 3 members 155 * @vno: vnode identifier id 156 * @pvno: vnode identifier id of parent vnode 157 * @version: vnode's version number 158 * @mctime: 159 * @nsize: length of name 160 * @dtype: file type 161 * @unused: just for padding 162 * @name_crc: crc of name 163 * @node_crc: crc of full node 164 * @name: name of the directory entry 165 */ 166 struct chfs_flash_dirent_node 167 { 168 le16 magic; 169 le16 type; 170 le32 length; 171 le32 hdr_crc; 172 le64 vno; 173 le64 pvno; 174 le64 version; 175 le32 mctime; 176 uint8_t nsize; 177 uint8_t dtype; 178 uint8_t unused[2]; 179 le32 name_crc; 180 le32 node_crc; 181 uint8_t name[0]; 182 } __packed; 183 184 /** 185 * struct chfs_flash_padding_node - node informations of data stored on 186 * flash 187 * @magic: filesystem magic 188 * @type: node type (CHFS_NODETYPE_PADDING) 189 * @length: length of node 190 * @hdr_crc: crc of the first 3 members 191 */ 192 struct chfs_flash_padding_node 193 { 194 le16 magic; 195 le16 type; 196 le32 length; 197 le32 hdr_crc; 198 } __packed; 199 200 #endif /* __CHFS_MEDIA_H__ */ 201
Indexes created Tue Sep 30 11:09:46 GMT 2025