include/uapi/linux/iso_fs.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _ISOFS_FS_H
   3 #define _ISOFS_FS_H
   4
   5 #include <linux/types.h>
   6 #include <linux/magic.h>
   7
   8 /*
   9  * The isofs filesystem constants/structures
  10  */
  11
  12 /* This part borrowed from the bsd386 isofs */
  13 #define ISODCL(from, to) (to - from + 1)
  14
  15 struct iso_volume_descriptor {
  16         __u8 type[ISODCL(1,1)]; /* 711 */
  17         char id[ISODCL(2,6)];
  18         __u8 version[ISODCL(7,7)];
  19         __u8 data[ISODCL(8,2048)];
  20 };
  21
  22 /* volume descriptor types */
  23 #define ISO_VD_PRIMARY 1
  24 #define ISO_VD_SUPPLEMENTARY 2
  25 #define ISO_VD_END 255
  26
  27 #define ISO_STANDARD_ID "CD001"
  28
  29 struct iso_primary_descriptor {
  30         __u8 type                       [ISODCL (  1,   1)]; /* 711 */
  31         char id                         [ISODCL (  2,   6)];
  32         __u8 version                    [ISODCL (  7,   7)]; /* 711 */
  33         __u8 unused1                    [ISODCL (  8,   8)];
  34         char system_id                  [ISODCL (  9,  40)]; /* achars */
  35         char volume_id                  [ISODCL ( 41,  72)]; /* dchars */
  36         __u8 unused2                    [ISODCL ( 73,  80)];
  37         __u8 volume_space_size          [ISODCL ( 81,  88)]; /* 733 */
  38         __u8 unused3                    [ISODCL ( 89, 120)];
  39         __u8 volume_set_size            [ISODCL (121, 124)]; /* 723 */
  40         __u8 volume_sequence_number     [ISODCL (125, 128)]; /* 723 */
  41         __u8 logical_block_size         [ISODCL (129, 132)]; /* 723 */
  42         __u8 path_table_size            [ISODCL (133, 140)]; /* 733 */
  43         __u8 type_l_path_table          [ISODCL (141, 144)]; /* 731 */
  44         __u8 opt_type_l_path_table      [ISODCL (145, 148)]; /* 731 */
  45         __u8 type_m_path_table          [ISODCL (149, 152)]; /* 732 */
  46         __u8 opt_type_m_path_table      [ISODCL (153, 156)]; /* 732 */
  47         __u8 root_directory_record      [ISODCL (157, 190)]; /* 9.1 */
  48         char volume_set_id              [ISODCL (191, 318)]; /* dchars */
  49         char publisher_id               [ISODCL (319, 446)]; /* achars */
  50         char preparer_id                [ISODCL (447, 574)]; /* achars */
  51         char application_id             [ISODCL (575, 702)]; /* achars */
  52         char copyright_file_id          [ISODCL (703, 739)]; /* 7.5 dchars */
  53         char abstract_file_id           [ISODCL (740, 776)]; /* 7.5 dchars */
  54         char bibliographic_file_id      [ISODCL (777, 813)]; /* 7.5 dchars */
  55         __u8 creation_date              [ISODCL (814, 830)]; /* 8.4.26.1 */
  56         __u8 modification_date          [ISODCL (831, 847)]; /* 8.4.26.1 */
  57         __u8 expiration_date            [ISODCL (848, 864)]; /* 8.4.26.1 */
  58         __u8 effective_date             [ISODCL (865, 881)]; /* 8.4.26.1 */
  59         __u8 file_structure_version     [ISODCL (882, 882)]; /* 711 */
  60         __u8 unused4                    [ISODCL (883, 883)];
  61         __u8 application_data           [ISODCL (884, 1395)];
  62         __u8 unused5                    [ISODCL (1396, 2048)];
  63 };
  64
  65 /* Almost the same as the primary descriptor but two fields are specified */
  66 struct iso_supplementary_descriptor {
  67         __u8 type                       [ISODCL (  1,   1)]; /* 711 */
  68         char id                         [ISODCL (  2,   6)];
  69         __u8 version                    [ISODCL (  7,   7)]; /* 711 */
  70         __u8 flags                      [ISODCL (  8,   8)]; /* 853 */
  71         char system_id                  [ISODCL (  9,  40)]; /* achars */
  72         char volume_id                  [ISODCL ( 41,  72)]; /* dchars */
  73         __u8 unused2                    [ISODCL ( 73,  80)];
  74         __u8 volume_space_size          [ISODCL ( 81,  88)]; /* 733 */
  75         __u8 escape                     [ISODCL ( 89, 120)]; /* 856 */
  76         __u8 volume_set_size            [ISODCL (121, 124)]; /* 723 */
  77         __u8 volume_sequence_number     [ISODCL (125, 128)]; /* 723 */
  78         __u8 logical_block_size         [ISODCL (129, 132)]; /* 723 */
  79         __u8 path_table_size            [ISODCL (133, 140)]; /* 733 */
  80         __u8 type_l_path_table          [ISODCL (141, 144)]; /* 731 */
  81         __u8 opt_type_l_path_table      [ISODCL (145, 148)]; /* 731 */
  82         __u8 type_m_path_table          [ISODCL (149, 152)]; /* 732 */
  83         __u8 opt_type_m_path_table      [ISODCL (153, 156)]; /* 732 */
  84         __u8 root_directory_record      [ISODCL (157, 190)]; /* 9.1 */
  85         char volume_set_id              [ISODCL (191, 318)]; /* dchars */
  86         char publisher_id               [ISODCL (319, 446)]; /* achars */
  87         char preparer_id                [ISODCL (447, 574)]; /* achars */
  88         char application_id             [ISODCL (575, 702)]; /* achars */
  89         char copyright_file_id          [ISODCL (703, 739)]; /* 7.5 dchars */
  90         char abstract_file_id           [ISODCL (740, 776)]; /* 7.5 dchars */
  91         char bibliographic_file_id      [ISODCL (777, 813)]; /* 7.5 dchars */
  92         __u8 creation_date              [ISODCL (814, 830)]; /* 8.4.26.1 */
  93         __u8 modification_date          [ISODCL (831, 847)]; /* 8.4.26.1 */
  94         __u8 expiration_date            [ISODCL (848, 864)]; /* 8.4.26.1 */
  95         __u8 effective_date             [ISODCL (865, 881)]; /* 8.4.26.1 */
  96         __u8 file_structure_version     [ISODCL (882, 882)]; /* 711 */
  97         __u8 unused4                    [ISODCL (883, 883)];
  98         __u8 application_data           [ISODCL (884, 1395)];
  99         __u8 unused5                    [ISODCL (1396, 2048)];
 100 };
 101
 102
 103 #define HS_STANDARD_ID "CDROM"
 104
 105 struct  hs_volume_descriptor {
 106         __u8 foo                        [ISODCL (  1,   8)]; /* 733 */
 107         __u8 type                       [ISODCL (  9,   9)]; /* 711 */
 108         char id                         [ISODCL ( 10,  14)];
 109         __u8 version                    [ISODCL ( 15,  15)]; /* 711 */
 110         __u8 data[ISODCL(16,2048)];
 111 };
 112
 113
 114 struct hs_primary_descriptor {
 115         __u8 foo                        [ISODCL (  1,   8)]; /* 733 */
 116         __u8 type                       [ISODCL (  9,   9)]; /* 711 */
 117         __u8 id                         [ISODCL ( 10,  14)];
 118         __u8 version                    [ISODCL ( 15,  15)]; /* 711 */
 119         __u8 unused1                    [ISODCL ( 16,  16)]; /* 711 */
 120         char system_id                  [ISODCL ( 17,  48)]; /* achars */
 121         char volume_id                  [ISODCL ( 49,  80)]; /* dchars */
 122         __u8 unused2                    [ISODCL ( 81,  88)]; /* 733 */
 123         __u8 volume_space_size          [ISODCL ( 89,  96)]; /* 733 */
 124         __u8 unused3                    [ISODCL ( 97, 128)]; /* 733 */
 125         __u8 volume_set_size            [ISODCL (129, 132)]; /* 723 */
 126         __u8 volume_sequence_number     [ISODCL (133, 136)]; /* 723 */
 127         __u8 logical_block_size         [ISODCL (137, 140)]; /* 723 */
 128         __u8 path_table_size            [ISODCL (141, 148)]; /* 733 */
 129         __u8 type_l_path_table          [ISODCL (149, 152)]; /* 731 */
 130         __u8 unused4                    [ISODCL (153, 180)]; /* 733 */
 131         __u8 root_directory_record      [ISODCL (181, 214)]; /* 9.1 */
 132 };
 133
 134 /* We use this to help us look up the parent inode numbers. */
 135
 136 struct iso_path_table{
 137         __u8  name_len[2];      /* 721 */
 138         __u8  extent[4];        /* 731 */
 139         __u8  parent[2];        /* 721 */
 140         char name[0];
 141 } __attribute__((packed));
 142
 143 /* high sierra is identical to iso, except that the date is only 6 bytes, and
 144    there is an extra reserved byte after the flags */
 145
 146 struct iso_directory_record {
 147         __u8 length                     [ISODCL (1, 1)]; /* 711 */
 148         __u8 ext_attr_length            [ISODCL (2, 2)]; /* 711 */
 149         __u8 extent                     [ISODCL (3, 10)]; /* 733 */
 150         __u8 size                       [ISODCL (11, 18)]; /* 733 */
 151         __u8 date                       [ISODCL (19, 25)]; /* 7 by 711 */
 152         __u8 flags                      [ISODCL (26, 26)];
 153         __u8 file_unit_size             [ISODCL (27, 27)]; /* 711 */
 154         __u8 interleave                 [ISODCL (28, 28)]; /* 711 */
 155         __u8 volume_sequence_number     [ISODCL (29, 32)]; /* 723 */
 156         __u8 name_len                   [ISODCL (33, 33)]; /* 711 */
 157         char name                       [0];
 158 } __attribute__((packed));
 159
 160 #define ISOFS_BLOCK_BITS 11
 161 #define ISOFS_BLOCK_SIZE 2048
 162
 163 #define ISOFS_BUFFER_SIZE(INODE) ((INODE)->i_sb->s_blocksize)
 164 #define ISOFS_BUFFER_BITS(INODE) ((INODE)->i_sb->s_blocksize_bits)
 165
 166 #endif /* _ISOFS_FS_H */