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 */ 167