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