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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _ISOFS_FS_H3#define _ISOFS_FS_H4 5#include <linux/types.h>6#include <linux/magic.h>7 8/*9 * The isofs filesystem constants/structures10 */11 12/* This part borrowed from the bsd386 isofs */13#define ISODCL(from, to) (to - from + 1)14 15struct 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 124#define ISO_VD_SUPPLEMENTARY 225#define ISO_VD_END 25526 27#define ISO_STANDARD_ID "CD001"28 29struct 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 */66struct 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 105struct 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 114struct 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 136struct iso_path_table{137 __u8 name_len[2]; /* 721 */138 __u8 extent[4]; /* 731 */139 __u8 parent[2]; /* 721 */140 char name[];141} __attribute__((packed));142 143/* high sierra is identical to iso, except that the date is only 6 bytes, and144 there is an extra reserved byte after the flags */145 146struct 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 [];158} __attribute__((packed));159 160#define ISOFS_BLOCK_BITS 11161#define ISOFS_BLOCK_SIZE 2048162 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