1
2 #ifndef _ISOFS_FS_H
3 #define _ISOFS_FS_H
4
5 #include <linux/types.h>
6 /*
7 * The isofs filesystem constants/structures
8 */
9
10 /* This part borrowed from the bsd386 isofs */
11 #define ISODCL(from, to) (to - from + 1)
12
13 struct iso_volume_descriptor {
14 char type[ISODCL(1,1)]; /* 711 */
15 char id[ISODCL(2,6)];
16 char version[ISODCL(7,7)];
17 char data[ISODCL(8,2048)];
18 };
19
20 /* volume descriptor types */
21 #define ISO_VD_PRIMARY 1
22 #define ISO_VD_SUPPLEMENTARY 2
23 #define ISO_VD_END 255
24
25 #define ISO_STANDARD_ID "CD001"
26
27 struct iso_primary_descriptor {
28 char type [ISODCL ( 1, 1)]; /* 711 */
29 char id [ISODCL ( 2, 6)];
30 char version [ISODCL ( 7, 7)]; /* 711 */
31 char unused1 [ISODCL ( 8, 8)];
32 char system_id [ISODCL ( 9, 40)]; /* achars */
33 char volume_id [ISODCL ( 41, 72)]; /* dchars */
34 char unused2 [ISODCL ( 73, 80)];
35 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
36 char unused3 [ISODCL ( 89, 120)];
37 char volume_set_size [ISODCL (121, 124)]; /* 723 */
38 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
39 char logical_block_size [ISODCL (129, 132)]; /* 723 */
40 char path_table_size [ISODCL (133, 140)]; /* 733 */
41 char type_l_path_table [ISODCL (141, 144)]; /* 731 */
42 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
43 char type_m_path_table [ISODCL (149, 152)]; /* 732 */
44 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
45 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
46 char volume_set_id [ISODCL (191, 318)]; /* dchars */
47 char publisher_id [ISODCL (319, 446)]; /* achars */
48 char preparer_id [ISODCL (447, 574)]; /* achars */
49 char application_id [ISODCL (575, 702)]; /* achars */
50 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
51 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
52 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
53 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
54 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
55 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
56 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
57 char file_structure_version [ISODCL (882, 882)]; /* 711 */
58 char unused4 [ISODCL (883, 883)];
59 char application_data [ISODCL (884, 1395)];
60 char unused5 [ISODCL (1396, 2048)];
61 };
62
63 /* Almost the same as the primary descriptor but two fields are specified */
64 struct iso_supplementary_descriptor {
65 char type [ISODCL ( 1, 1)]; /* 711 */
66 char id [ISODCL ( 2, 6)];
67 char version [ISODCL ( 7, 7)]; /* 711 */
68 char flags [ISODCL ( 8, 8)]; /* 853 */
69 char system_id [ISODCL ( 9, 40)]; /* achars */
70 char volume_id [ISODCL ( 41, 72)]; /* dchars */
71 char unused2 [ISODCL ( 73, 80)];
72 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
73 char escape [ISODCL ( 89, 120)]; /* 856 */
74 char volume_set_size [ISODCL (121, 124)]; /* 723 */
75 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
76 char logical_block_size [ISODCL (129, 132)]; /* 723 */
77 char path_table_size [ISODCL (133, 140)]; /* 733 */
78 char type_l_path_table [ISODCL (141, 144)]; /* 731 */
79 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
80 char type_m_path_table [ISODCL (149, 152)]; /* 732 */
81 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
82 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
83 char volume_set_id [ISODCL (191, 318)]; /* dchars */
84 char publisher_id [ISODCL (319, 446)]; /* achars */
85 char preparer_id [ISODCL (447, 574)]; /* achars */
86 char application_id [ISODCL (575, 702)]; /* achars */
87 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
88 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
89 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
90 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
91 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
92 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
93 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
94 char file_structure_version [ISODCL (882, 882)]; /* 711 */
95 char unused4 [ISODCL (883, 883)];
96 char application_data [ISODCL (884, 1395)];
97 char unused5 [ISODCL (1396, 2048)];
98 };
99
100
101 #define HS_STANDARD_ID "CDROM"
102
103 struct hs_volume_descriptor {
104 char foo [ISODCL ( 1, 8)]; /* 733 */
105 char type [ISODCL ( 9, 9)]; /* 711 */
106 char id [ISODCL ( 10, 14)];
107 char version [ISODCL ( 15, 15)]; /* 711 */
108 char data[ISODCL(16,2048)];
109 };
110
111
112 struct hs_primary_descriptor {
113 char foo [ISODCL ( 1, 8)]; /* 733 */
114 char type [ISODCL ( 9, 9)]; /* 711 */
115 char id [ISODCL ( 10, 14)];
116 char version [ISODCL ( 15, 15)]; /* 711 */
117 char unused1 [ISODCL ( 16, 16)]; /* 711 */
118 char system_id [ISODCL ( 17, 48)]; /* achars */
119 char volume_id [ISODCL ( 49, 80)]; /* dchars */
120 char unused2 [ISODCL ( 81, 88)]; /* 733 */
121 char volume_space_size [ISODCL ( 89, 96)]; /* 733 */
122 char unused3 [ISODCL ( 97, 128)]; /* 733 */
123 char volume_set_size [ISODCL (129, 132)]; /* 723 */
124 char volume_sequence_number [ISODCL (133, 136)]; /* 723 */
125 char logical_block_size [ISODCL (137, 140)]; /* 723 */
126 char path_table_size [ISODCL (141, 148)]; /* 733 */
127 char type_l_path_table [ISODCL (149, 152)]; /* 731 */
128 char unused4 [ISODCL (153, 180)]; /* 733 */
129 char root_directory_record [ISODCL (181, 214)]; /* 9.1 */
130 };
131
132 /* We use this to help us look up the parent inode numbers. */
133
134 struct iso_path_table{
135 unsigned char name_len[2]; /* 721 */
136 char extent[4]; /* 731 */
137 char parent[2]; /* 721 */
138 char name[0];
139 } __attribute__((packed));
140
141 /* high sierra is identical to iso, except that the date is only 6 bytes, and
142 there is an extra reserved byte after the flags */
143
144 struct iso_directory_record {
145 char length [ISODCL (1, 1)]; /* 711 */
146 char ext_attr_length [ISODCL (2, 2)]; /* 711 */
147 char extent [ISODCL (3, 10)]; /* 733 */
148 char size [ISODCL (11, 18)]; /* 733 */
149 char date [ISODCL (19, 25)]; /* 7 by 711 */
150 char flags [ISODCL (26, 26)];
151 char file_unit_size [ISODCL (27, 27)]; /* 711 */
152 char interleave [ISODCL (28, 28)]; /* 711 */
153 char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
154 unsigned char name_len [ISODCL (33, 33)]; /* 711 */
155 char name [0];
156 } __attribute__((packed));
157
158 #define ISOFS_BLOCK_BITS 11
159 #define ISOFS_BLOCK_SIZE 2048
160
161 #define ISOFS_BUFFER_SIZE(INODE) ((INODE)->i_sb->s_blocksize)
162 #define ISOFS_BUFFER_BITS(INODE) ((INODE)->i_sb->s_blocksize_bits)
163 #define ISOFS_ZONE_BITS(INODE) ((INODE)->i_sb->u.isofs_sb.s_log_zone_size)
164
165 #define ISOFS_SUPER_MAGIC 0x9660
166
167 #ifdef __KERNEL__
168 /* Number conversion inlines, named after the section in ISO 9660
169 they correspond to. */
170
171 #include <asm/byteorder.h>
172 #include <asm/unaligned.h>
173
isonum_711(char * p)174 static inline int isonum_711(char *p)
175 {
176 return *(u8 *)p;
177 }
isonum_712(char * p)178 static inline int isonum_712(char *p)
179 {
180 return *(s8 *)p;
181 }
isonum_721(char * p)182 static inline unsigned int isonum_721(char *p)
183 {
184 return le16_to_cpu(get_unaligned((u16 *)p));
185 }
isonum_722(char * p)186 static inline unsigned int isonum_722(char *p)
187 {
188 return be16_to_cpu(get_unaligned((u16 *)p));
189 }
isonum_723(char * p)190 static inline unsigned int isonum_723(char *p)
191 {
192 /* Ignore bigendian datum due to broken mastering programs */
193 return le16_to_cpu(get_unaligned((u16 *)p));
194 }
isonum_731(char * p)195 static inline unsigned int isonum_731(char *p)
196 {
197 return le32_to_cpu(get_unaligned((u32 *)p));
198 }
isonum_732(char * p)199 static inline unsigned int isonum_732(char *p)
200 {
201 return be32_to_cpu(get_unaligned((u32 *)p));
202 }
isonum_733(char * p)203 static inline unsigned int isonum_733(char *p)
204 {
205 /* Ignore bigendian datum due to broken mastering programs */
206 return le32_to_cpu(get_unaligned((u32 *)p));
207 }
208 extern int iso_date(char *, int);
209
210 struct inode; /* To make gcc happy */
211
212 extern int parse_rock_ridge_inode(struct iso_directory_record *, struct inode *);
213 extern int get_rock_ridge_filename(struct iso_directory_record *, char *, struct inode *);
214 extern int isofs_name_translate(struct iso_directory_record *, char *, struct inode *);
215
216 extern int find_rock_ridge_relocation(struct iso_directory_record *, struct inode *);
217
218 int get_joliet_filename(struct iso_directory_record *, unsigned char *, struct inode *);
219 int get_acorn_filename(struct iso_directory_record *, char *, struct inode *);
220
221 extern struct dentry *isofs_lookup(struct inode *, struct dentry *);
222 extern struct buffer_head *isofs_bread(struct inode *inode, unsigned int block);
223 extern int isofs_get_blocks(struct inode *, long, struct buffer_head **, unsigned long);
224
225 extern struct inode_operations isofs_dir_inode_operations;
226 extern struct file_operations isofs_dir_operations;
227 extern struct address_space_operations isofs_symlink_aops;
228
229 /* The following macros are used to check for memory leaks. */
230 #ifdef LEAK_CHECK
231 #define free_s leak_check_free_s
232 #define malloc leak_check_malloc
233 #define sb_bread leak_check_bread
234 #define brelse leak_check_brelse
235 extern void * leak_check_malloc(unsigned int size);
236 extern void leak_check_free_s(void * obj, int size);
237 extern struct buffer_head * leak_check_bread(struct super_block *sb, int block);
238 extern void leak_check_brelse(struct buffer_head * bh);
239 #endif /* LEAK_CHECK */
240
241 #endif /* __KERNEL__ */
242
243 #endif
244