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iso_fs.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _ISOFS_FS_H #define _ISOFS_FS_H #include <linux/types.h> #include <linux/magic.h> /* * The isofs filesystem constants/structures */ /* This part borrowed from the bsd386 isofs */ #define ISODCL(from, to) (to - from + 1) struct iso_volume_descriptor { __u8 type[ISODCL(1,1)]; /* 711 */ char id[ISODCL(2,6)]; __u8 version[ISODCL(7,7)]; __u8 data[ISODCL(8,2048)]; }; /* volume descriptor types */ #define ISO_VD_PRIMARY 1 #define ISO_VD_SUPPLEMENTARY 2 #define ISO_VD_END 255 #define ISO_STANDARD_ID "CD001" struct iso_primary_descriptor { __u8 type [ISODCL ( 1, 1)]; /* 711 */ char id [ISODCL ( 2, 6)]; __u8 version [ISODCL ( 7, 7)]; /* 711 */ __u8 unused1 [ISODCL ( 8, 8)]; char system_id [ISODCL ( 9, 40)]; /* achars */ char volume_id [ISODCL ( 41, 72)]; /* dchars */ __u8 unused2 [ISODCL ( 73, 80)]; __u8 volume_space_size [ISODCL ( 81, 88)]; /* 733 */ __u8 unused3 [ISODCL ( 89, 120)]; __u8 volume_set_size [ISODCL (121, 124)]; /* 723 */ __u8 volume_sequence_number [ISODCL (125, 128)]; /* 723 */ __u8 logical_block_size [ISODCL (129, 132)]; /* 723 */ __u8 path_table_size [ISODCL (133, 140)]; /* 733 */ __u8 type_l_path_table [ISODCL (141, 144)]; /* 731 */ __u8 opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */ __u8 type_m_path_table [ISODCL (149, 152)]; /* 732 */ __u8 opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */ __u8 root_directory_record [ISODCL (157, 190)]; /* 9.1 */ char volume_set_id [ISODCL (191, 318)]; /* dchars */ char publisher_id [ISODCL (319, 446)]; /* achars */ char preparer_id [ISODCL (447, 574)]; /* achars */ char application_id [ISODCL (575, 702)]; /* achars */ char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */ char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */ char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */ __u8 creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */ __u8 modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */ __u8 expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */ __u8 effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */ __u8 file_structure_version [ISODCL (882, 882)]; /* 711 */ __u8 unused4 [ISODCL (883, 883)]; __u8 application_data [ISODCL (884, 1395)]; __u8 unused5 [ISODCL (1396, 2048)]; }; /* Almost the same as the primary descriptor but two fields are specified */ struct iso_supplementary_descriptor { __u8 type [ISODCL ( 1, 1)]; /* 711 */ char id [ISODCL ( 2, 6)]; __u8 version [ISODCL ( 7, 7)]; /* 711 */ __u8 flags [ISODCL ( 8, 8)]; /* 853 */ char system_id [ISODCL ( 9, 40)]; /* achars */ char volume_id [ISODCL ( 41, 72)]; /* dchars */ __u8 unused2 [ISODCL ( 73, 80)]; __u8 volume_space_size [ISODCL ( 81, 88)]; /* 733 */ __u8 escape [ISODCL ( 89, 120)]; /* 856 */ __u8 volume_set_size [ISODCL (121, 124)]; /* 723 */ __u8 volume_sequence_number [ISODCL (125, 128)]; /* 723 */ __u8 logical_block_size [ISODCL (129, 132)]; /* 723 */ __u8 path_table_size [ISODCL (133, 140)]; /* 733 */ __u8 type_l_path_table [ISODCL (141, 144)]; /* 731 */ __u8 opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */ __u8 type_m_path_table [ISODCL (149, 152)]; /* 732 */ __u8 opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */ __u8 root_directory_record [ISODCL (157, 190)]; /* 9.1 */ char volume_set_id [ISODCL (191, 318)]; /* dchars */ char publisher_id [ISODCL (319, 446)]; /* achars */ char preparer_id [ISODCL (447, 574)]; /* achars */ char application_id [ISODCL (575, 702)]; /* achars */ char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */ char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */ char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */ __u8 creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */ __u8 modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */ __u8 expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */ __u8 effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */ __u8 file_structure_version [ISODCL (882, 882)]; /* 711 */ __u8 unused4 [ISODCL (883, 883)]; __u8 application_data [ISODCL (884, 1395)]; __u8 unused5 [ISODCL (1396, 2048)]; }; #define HS_STANDARD_ID "CDROM" struct hs_volume_descriptor { __u8 foo [ISODCL ( 1, 8)]; /* 733 */ __u8 type [ISODCL ( 9, 9)]; /* 711 */ char id [ISODCL ( 10, 14)]; __u8 version [ISODCL ( 15, 15)]; /* 711 */ __u8 data[ISODCL(16,2048)]; }; struct hs_primary_descriptor { __u8 foo [ISODCL ( 1, 8)]; /* 733 */ __u8 type [ISODCL ( 9, 9)]; /* 711 */ __u8 id [ISODCL ( 10, 14)]; __u8 version [ISODCL ( 15, 15)]; /* 711 */ __u8 unused1 [ISODCL ( 16, 16)]; /* 711 */ char system_id [ISODCL ( 17, 48)]; /* achars */ char volume_id [ISODCL ( 49, 80)]; /* dchars */ __u8 unused2 [ISODCL ( 81, 88)]; /* 733 */ __u8 volume_space_size [ISODCL ( 89, 96)]; /* 733 */ __u8 unused3 [ISODCL ( 97, 128)]; /* 733 */ __u8 volume_set_size [ISODCL (129, 132)]; /* 723 */ __u8 volume_sequence_number [ISODCL (133, 136)]; /* 723 */ __u8 logical_block_size [ISODCL (137, 140)]; /* 723 */ __u8 path_table_size [ISODCL (141, 148)]; /* 733 */ __u8 type_l_path_table [ISODCL (149, 152)]; /* 731 */ __u8 unused4 [ISODCL (153, 180)]; /* 733 */ __u8 root_directory_record [ISODCL (181, 214)]; /* 9.1 */ }; /* We use this to help us look up the parent inode numbers. */ struct iso_path_table{ __u8 name_len[2]; /* 721 */ __u8 extent[4]; /* 731 */ __u8 parent[2]; /* 721 */ char name[0]; } __attribute__((packed)); /* high sierra is identical to iso, except that the date is only 6 bytes, and there is an extra reserved byte after the flags */ struct iso_directory_record { __u8 length [ISODCL (1, 1)]; /* 711 */ __u8 ext_attr_length [ISODCL (2, 2)]; /* 711 */ __u8 extent [ISODCL (3, 10)]; /* 733 */ __u8 size [ISODCL (11, 18)]; /* 733 */ __u8 date [ISODCL (19, 25)]; /* 7 by 711 */ __u8 flags [ISODCL (26, 26)]; __u8 file_unit_size [ISODCL (27, 27)]; /* 711 */ __u8 interleave [ISODCL (28, 28)]; /* 711 */ __u8 volume_sequence_number [ISODCL (29, 32)]; /* 723 */ __u8 name_len [ISODCL (33, 33)]; /* 711 */ char name [0]; } __attribute__((packed)); #define ISOFS_BLOCK_BITS 11 #define ISOFS_BLOCK_SIZE 2048 #define ISOFS_BUFFER_SIZE(INODE) ((INODE)->i_sb->s_blocksize) #define ISOFS_BUFFER_BITS(INODE) ((INODE)->i_sb->s_blocksize_bits) #endif /* _ISOFS_FS_H */