fs/grubfs/iso9660.h

   1 /*
   2  *  ISO 9660 filesystem backend for GRUB (GRand Unified Bootloader)
   3  *  including Rock Ridge Extensions support
   4  *
   5  *  Copyright (C) 1998, 1999  Kousuke Takai  <tak@kmc.kyoto-u.ac.jp>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20  *  MA 02110-1301, USA.
  21  */
  22 /*
  23  *  References:
  24  *      linux/fs/isofs/rock.[ch]
  25  *      mkisofs-1.11.1/diag/isoinfo.c
  26  *      mkisofs-1.11.1/iso9660.h
  27  *              (all are written by Eric Youngdale)
  28  */
  29
  30 /*
  31  * Modified by SONE Takeshi to work with FILO
  32  */
  33
  34 #ifndef _ISO9660_H_
  35 #define _ISO9660_H_
  36
  37 #define ISO_SECTOR_BITS              (11)
  38 #define ISO_SECTOR_SIZE              (1<<ISO_SECTOR_BITS)
  39
  40 #define ISO_REGULAR     1       /* regular file */
  41 #define ISO_DIRECTORY   2       /* directory    */
  42 #define ISO_OTHER       0       /* other file (with Rock Ridge) */
  43
  44 #define RR_FLAG_PX      0x01    /* have POSIX file attributes */
  45 #define RR_FLAG_NM      0x08    /* have alternate file name   */
  46
  47 /* POSIX file attributes for Rock Ridge extensions */
  48 #define POSIX_S_IFMT    0xF000
  49 #define POSIX_S_IFREG   0x8000
  50 #define POSIX_S_IFDIR   0x4000
  51
  52 /* volume descriptor types */
  53 #define ISO_VD_PRIMARY 1
  54 #define ISO_VD_END 255
  55
  56 #define ISO_STANDARD_ID "CD001"
  57
  58 #ifndef ASM_FILE
  59
  60 typedef union {
  61         uint8_t l,b;
  62 }       iso_8bit_t;
  63
  64 typedef struct __iso_16bit {
  65         uint16_t l, b;
  66 } iso_16bit_t;
  67
  68 typedef struct __iso_32bit {
  69         uint32_t l, b;
  70 } iso_32bit_t;
  71
  72 typedef uint8_t         iso_date_t[7];
  73
  74 struct iso_directory_record {
  75         iso_8bit_t      length;
  76         iso_8bit_t      ext_attr_length;
  77         iso_32bit_t     extent;
  78         iso_32bit_t     size;
  79         iso_date_t      date;
  80         iso_8bit_t      flags;
  81         iso_8bit_t      file_unit_size;
  82         iso_8bit_t      interleave;
  83         iso_16bit_t     volume_seq_number;
  84         iso_8bit_t      name_len;
  85         uint8_t name[1];
  86 } __attribute__ ((packed));
  87
  88 struct iso_primary_descriptor {
  89         iso_8bit_t      type;
  90         uint8_t         id[5];
  91         iso_8bit_t      version;
  92         uint8_t         _unused1[1];
  93         uint8_t         system_id[32];
  94         uint8_t         volume_id[32];
  95         uint8_t         _unused2[8];
  96         iso_32bit_t     volume_space_size;
  97         uint8_t         _unused3[32];
  98         iso_16bit_t     volume_set_size;
  99         iso_16bit_t     volume_seq_number;
 100         iso_16bit_t     logical_block_size;
 101         iso_32bit_t     path_table_size;
 102         uint8_t         type_l_path_table[4];
 103         uint8_t         opt_type_l_path_table[4];
 104         uint8_t         type_m_path_table[4];
 105         uint8_t         opt_type_m_path_table[4];
 106         struct iso_directory_record root_directory_record;
 107         uint8_t         volume_set_id[128];
 108         uint8_t         publisher_id[128];
 109         uint8_t         preparer_id[128];
 110         uint8_t         application_id[128];
 111         uint8_t         copyright_file_id[37];
 112         uint8_t         abstract_file_id[37];
 113         uint8_t         bibliographic_file_id[37];
 114         uint8_t         creation_date[17];
 115         uint8_t         modification_date[17];
 116         uint8_t         expiration_date[17];
 117         uint8_t         effective_date[17];
 118         iso_8bit_t      file_structure_version;
 119         uint8_t         _unused4[1];
 120         uint8_t         application_data[512];
 121         uint8_t         _unused5[653];
 122 } __attribute__ ((packed));
 123
 124 struct rock_ridge {
 125         uint16_t        signature;
 126         uint8_t         len;
 127         uint8_t         version;
 128         union {
 129           struct CE {
 130             iso_32bit_t extent;
 131             iso_32bit_t offset;
 132             iso_32bit_t size;
 133           } ce;
 134           struct NM {
 135             iso_8bit_t  flags;
 136             uint8_t     name[0];
 137           } nm;
 138           struct PX {
 139             iso_32bit_t mode;
 140             iso_32bit_t nlink;
 141             iso_32bit_t uid;
 142             iso_32bit_t gid;
 143           } px;
 144           struct RR {
 145             iso_8bit_t  flags;
 146           } rr;
 147         } u;
 148 } __attribute__ ((packed));
 149
 150 typedef union RR_ptr {
 151         struct rock_ridge *rr;
 152         char              *ptr;
 153         int                i;
 154 } RR_ptr_t;
 155
 156 #define CHECK2(ptr, c1, c2)                                             \
 157     (*(unsigned char *)(ptr) == (c1) &&                                 \
 158      *((unsigned char *)(ptr) + 1) == (c2))
 159 #define CHECK4(ptr, c1, c2, c3, c4)                                     \
 160     (*(unsigned char *)(ptr) == (c1) &&                                 \
 161      *((unsigned char *)(ptr) + 1) == (c2) &&                           \
 162      *((unsigned char *)(ptr) + 2) == (c3) &&                           \
 163      *((unsigned char *)(ptr) + 3) == (c4))
 164
 165 #endif /* !ASM_FILE */
 166
 167 #endif /* _ISO9660_H_ */