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[];
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 [];
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
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