iso_fs.h
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#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 {
char type[ISODCL(1,1)]; /* 711 */
char id[ISODCL(2,6)];
char version[ISODCL(7,7)];
char 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 {
char type [ISODCL ( 1, 1)]; /* 711 */
char id [ISODCL ( 2, 6)];
char version [ISODCL ( 7, 7)]; /* 711 */
char unused1 [ISODCL ( 8, 8)];
char system_id [ISODCL ( 9, 40)]; /* achars */
char volume_id [ISODCL ( 41, 72)]; /* dchars */
char unused2 [ISODCL ( 73, 80)];
char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
char unused3 [ISODCL ( 89, 120)];
char volume_set_size [ISODCL (121, 124)]; /* 723 */
char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
char logical_block_size [ISODCL (129, 132)]; /* 723 */
char path_table_size [ISODCL (133, 140)]; /* 733 */
char type_l_path_table [ISODCL (141, 144)]; /* 731 */
char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
char type_m_path_table [ISODCL (149, 152)]; /* 732 */
char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
char 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 */
char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
char file_structure_version [ISODCL (882, 882)]; /* 711 */
char unused4 [ISODCL (883, 883)];
char application_data [ISODCL (884, 1395)];
char unused5 [ISODCL (1396, 2048)];
};
/* Almost the same as the primary descriptor but two fields are specified */
struct iso_supplementary_descriptor {
char type [ISODCL ( 1, 1)]; /* 711 */
char id [ISODCL ( 2, 6)];
char version [ISODCL ( 7, 7)]; /* 711 */
char flags [ISODCL ( 8, 8)]; /* 853 */
char system_id [ISODCL ( 9, 40)]; /* achars */
char volume_id [ISODCL ( 41, 72)]; /* dchars */
char unused2 [ISODCL ( 73, 80)];
char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
char escape [ISODCL ( 89, 120)]; /* 856 */
char volume_set_size [ISODCL (121, 124)]; /* 723 */
char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
char logical_block_size [ISODCL (129, 132)]; /* 723 */
char path_table_size [ISODCL (133, 140)]; /* 733 */
char type_l_path_table [ISODCL (141, 144)]; /* 731 */
char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
char type_m_path_table [ISODCL (149, 152)]; /* 732 */
char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
char 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 */
char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
char file_structure_version [ISODCL (882, 882)]; /* 711 */
char unused4 [ISODCL (883, 883)];
char application_data [ISODCL (884, 1395)];
char unused5 [ISODCL (1396, 2048)];
};
#define HS_STANDARD_ID "CDROM"
struct hs_volume_descriptor {
char foo [ISODCL ( 1, 8)]; /* 733 */
char type [ISODCL ( 9, 9)]; /* 711 */
char id [ISODCL ( 10, 14)];
char version [ISODCL ( 15, 15)]; /* 711 */
char data[ISODCL(16,2048)];
};
struct hs_primary_descriptor {
char foo [ISODCL ( 1, 8)]; /* 733 */
char type [ISODCL ( 9, 9)]; /* 711 */
char id [ISODCL ( 10, 14)];
char version [ISODCL ( 15, 15)]; /* 711 */
char unused1 [ISODCL ( 16, 16)]; /* 711 */
char system_id [ISODCL ( 17, 48)]; /* achars */
char volume_id [ISODCL ( 49, 80)]; /* dchars */
char unused2 [ISODCL ( 81, 88)]; /* 733 */
char volume_space_size [ISODCL ( 89, 96)]; /* 733 */
char unused3 [ISODCL ( 97, 128)]; /* 733 */
char volume_set_size [ISODCL (129, 132)]; /* 723 */
char volume_sequence_number [ISODCL (133, 136)]; /* 723 */
char logical_block_size [ISODCL (137, 140)]; /* 723 */
char path_table_size [ISODCL (141, 148)]; /* 733 */
char type_l_path_table [ISODCL (149, 152)]; /* 731 */
char unused4 [ISODCL (153, 180)]; /* 733 */
char root_directory_record [ISODCL (181, 214)]; /* 9.1 */
};
/* We use this to help us look up the parent inode numbers. */
struct iso_path_table{
unsigned char name_len[2]; /* 721 */
char extent[4]; /* 731 */
char 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 {
char length [ISODCL (1, 1)]; /* 711 */
char ext_attr_length [ISODCL (2, 2)]; /* 711 */
char extent [ISODCL (3, 10)]; /* 733 */
char size [ISODCL (11, 18)]; /* 733 */
char date [ISODCL (19, 25)]; /* 7 by 711 */
char flags [ISODCL (26, 26)];
char file_unit_size [ISODCL (27, 27)]; /* 711 */
char interleave [ISODCL (28, 28)]; /* 711 */
char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
unsigned char 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 */