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iso_fs.h
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1 #ifndef _ISOFS_FS_H
2 #define _ISOFS_FS_H
3 
4 #include <linux/types.h>
5 #include <linux/magic.h>
6 
7 /*
8  * The isofs filesystem constants/structures
9  */
10 
11 /* This part borrowed from the bsd386 isofs */
12 #define ISODCL(from, to) (to - from + 1)
13 
14 struct iso_volume_descriptor {
15  char type[ISODCL(1,1)]; /* 711 */
16  char id[ISODCL(2,6)];
17  char version[ISODCL(7,7)];
18  char data[ISODCL(8,2048)];
19 };
20 
21 /* volume descriptor types */
22 #define ISO_VD_PRIMARY 1
23 #define ISO_VD_SUPPLEMENTARY 2
24 #define ISO_VD_END 255
25 
26 #define ISO_STANDARD_ID "CD001"
27 
28 struct iso_primary_descriptor {
29  char type [ISODCL ( 1, 1)]; /* 711 */
30  char id [ISODCL ( 2, 6)];
31  char version [ISODCL ( 7, 7)]; /* 711 */
32  char unused1 [ISODCL ( 8, 8)];
33  char system_id [ISODCL ( 9, 40)]; /* achars */
34  char volume_id [ISODCL ( 41, 72)]; /* dchars */
35  char unused2 [ISODCL ( 73, 80)];
36  char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
37  char unused3 [ISODCL ( 89, 120)];
38  char volume_set_size [ISODCL (121, 124)]; /* 723 */
39  char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
40  char logical_block_size [ISODCL (129, 132)]; /* 723 */
41  char path_table_size [ISODCL (133, 140)]; /* 733 */
42  char type_l_path_table [ISODCL (141, 144)]; /* 731 */
43  char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
44  char type_m_path_table [ISODCL (149, 152)]; /* 732 */
45  char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
46  char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
47  char volume_set_id [ISODCL (191, 318)]; /* dchars */
48  char publisher_id [ISODCL (319, 446)]; /* achars */
49  char preparer_id [ISODCL (447, 574)]; /* achars */
50  char application_id [ISODCL (575, 702)]; /* achars */
51  char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
52  char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
53  char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
54  char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
55  char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
56  char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
57  char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
58  char file_structure_version [ISODCL (882, 882)]; /* 711 */
59  char unused4 [ISODCL (883, 883)];
60  char application_data [ISODCL (884, 1395)];
61  char unused5 [ISODCL (1396, 2048)];
62 };
63 
64 /* Almost the same as the primary descriptor but two fields are specified */
65 struct iso_supplementary_descriptor {
66  char type [ISODCL ( 1, 1)]; /* 711 */
67  char id [ISODCL ( 2, 6)];
68  char version [ISODCL ( 7, 7)]; /* 711 */
69  char flags [ISODCL ( 8, 8)]; /* 853 */
70  char system_id [ISODCL ( 9, 40)]; /* achars */
71  char volume_id [ISODCL ( 41, 72)]; /* dchars */
72  char unused2 [ISODCL ( 73, 80)];
73  char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
74  char escape [ISODCL ( 89, 120)]; /* 856 */
75  char volume_set_size [ISODCL (121, 124)]; /* 723 */
76  char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
77  char logical_block_size [ISODCL (129, 132)]; /* 723 */
78  char path_table_size [ISODCL (133, 140)]; /* 733 */
79  char type_l_path_table [ISODCL (141, 144)]; /* 731 */
80  char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
81  char type_m_path_table [ISODCL (149, 152)]; /* 732 */
82  char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
83  char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
84  char volume_set_id [ISODCL (191, 318)]; /* dchars */
85  char publisher_id [ISODCL (319, 446)]; /* achars */
86  char preparer_id [ISODCL (447, 574)]; /* achars */
87  char application_id [ISODCL (575, 702)]; /* achars */
88  char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
89  char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
90  char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
91  char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
92  char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
93  char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
94  char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
95  char file_structure_version [ISODCL (882, 882)]; /* 711 */
96  char unused4 [ISODCL (883, 883)];
97  char application_data [ISODCL (884, 1395)];
98  char unused5 [ISODCL (1396, 2048)];
99 };
100 
101 
102 #define HS_STANDARD_ID "CDROM"
103 
104 struct hs_volume_descriptor {
105  char foo [ISODCL ( 1, 8)]; /* 733 */
106  char type [ISODCL ( 9, 9)]; /* 711 */
107  char id [ISODCL ( 10, 14)];
108  char version [ISODCL ( 15, 15)]; /* 711 */
109  char data[ISODCL(16,2048)];
110 };
111 
112 
113 struct hs_primary_descriptor {
114  char foo [ISODCL ( 1, 8)]; /* 733 */
115  char type [ISODCL ( 9, 9)]; /* 711 */
116  char id [ISODCL ( 10, 14)];
117  char version [ISODCL ( 15, 15)]; /* 711 */
118  char unused1 [ISODCL ( 16, 16)]; /* 711 */
119  char system_id [ISODCL ( 17, 48)]; /* achars */
120  char volume_id [ISODCL ( 49, 80)]; /* dchars */
121  char unused2 [ISODCL ( 81, 88)]; /* 733 */
122  char volume_space_size [ISODCL ( 89, 96)]; /* 733 */
123  char unused3 [ISODCL ( 97, 128)]; /* 733 */
124  char volume_set_size [ISODCL (129, 132)]; /* 723 */
125  char volume_sequence_number [ISODCL (133, 136)]; /* 723 */
126  char logical_block_size [ISODCL (137, 140)]; /* 723 */
127  char path_table_size [ISODCL (141, 148)]; /* 733 */
128  char type_l_path_table [ISODCL (149, 152)]; /* 731 */
129  char unused4 [ISODCL (153, 180)]; /* 733 */
130  char root_directory_record [ISODCL (181, 214)]; /* 9.1 */
131 };
132 
133 /* We use this to help us look up the parent inode numbers. */
134 
135 struct iso_path_table{
136  unsigned char name_len[2]; /* 721 */
137  char extent[4]; /* 731 */
138  char parent[2]; /* 721 */
139  char name[0];
140 } __attribute__((packed));
141 
142 /* high sierra is identical to iso, except that the date is only 6 bytes, and
143  there is an extra reserved byte after the flags */
144 
145 struct iso_directory_record {
146  char length [ISODCL (1, 1)]; /* 711 */
147  char ext_attr_length [ISODCL (2, 2)]; /* 711 */
148  char extent [ISODCL (3, 10)]; /* 733 */
149  char size [ISODCL (11, 18)]; /* 733 */
150  char date [ISODCL (19, 25)]; /* 7 by 711 */
151  char flags [ISODCL (26, 26)];
152  char file_unit_size [ISODCL (27, 27)]; /* 711 */
153  char interleave [ISODCL (28, 28)]; /* 711 */
154  char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
155  unsigned char name_len [ISODCL (33, 33)]; /* 711 */
156  char name [0];
157 } __attribute__((packed));
158 
159 #define ISOFS_BLOCK_BITS 11
160 #define ISOFS_BLOCK_SIZE 2048
161 
162 #define ISOFS_BUFFER_SIZE(INODE) ((INODE)->i_sb->s_blocksize)
163 #define ISOFS_BUFFER_BITS(INODE) ((INODE)->i_sb->s_blocksize_bits)
164 
165 #endif /* _ISOFS_FS_H */
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