Root/fs/udf/udf_sb.h

1#ifndef __LINUX_UDF_SB_H
2#define __LINUX_UDF_SB_H
3
4#include <linux/mutex.h>
5#include <linux/bitops.h>
6
7/* Since UDF 2.01 is ISO 13346 based... */
8#define UDF_SUPER_MAGIC 0x15013346
9
10#define UDF_MAX_READ_VERSION 0x0250
11#define UDF_MAX_WRITE_VERSION 0x0201
12
13#define UDF_FLAG_USE_EXTENDED_FE 0
14#define UDF_VERS_USE_EXTENDED_FE 0x0200
15#define UDF_FLAG_USE_STREAMS 1
16#define UDF_VERS_USE_STREAMS 0x0200
17#define UDF_FLAG_USE_SHORT_AD 2
18#define UDF_FLAG_USE_AD_IN_ICB 3
19#define UDF_FLAG_USE_FILE_CTIME_EA 4
20#define UDF_FLAG_STRICT 5
21#define UDF_FLAG_UNDELETE 6
22#define UDF_FLAG_UNHIDE 7
23#define UDF_FLAG_VARCONV 8
24#define UDF_FLAG_NLS_MAP 9
25#define UDF_FLAG_UTF8 10
26#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
27#define UDF_FLAG_UID_IGNORE 12 /* use sb uid instead of on disk uid */
28#define UDF_FLAG_GID_FORGET 13
29#define UDF_FLAG_GID_IGNORE 14
30#define UDF_FLAG_UID_SET 15
31#define UDF_FLAG_GID_SET 16
32#define UDF_FLAG_SESSION_SET 17
33#define UDF_FLAG_LASTBLOCK_SET 18
34#define UDF_FLAG_BLOCKSIZE_SET 19
35
36#define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
37#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
38#define UDF_PART_FLAG_FREED_BITMAP 0x0004
39#define UDF_PART_FLAG_FREED_TABLE 0x0008
40#define UDF_PART_FLAG_READ_ONLY 0x0010
41#define UDF_PART_FLAG_WRITE_ONCE 0x0020
42#define UDF_PART_FLAG_REWRITABLE 0x0040
43#define UDF_PART_FLAG_OVERWRITABLE 0x0080
44
45#define UDF_MAX_BLOCK_LOADED 8
46
47#define UDF_TYPE1_MAP15 0x1511U
48#define UDF_VIRTUAL_MAP15 0x1512U
49#define UDF_VIRTUAL_MAP20 0x2012U
50#define UDF_SPARABLE_MAP15 0x1522U
51#define UDF_METADATA_MAP25 0x2511U
52
53#define UDF_INVALID_MODE ((mode_t)-1)
54
55#pragma pack(1) /* XXX(hch): Why? This file just defines in-core structures */
56
57struct udf_meta_data {
58    __u32 s_meta_file_loc;
59    __u32 s_mirror_file_loc;
60    __u32 s_bitmap_file_loc;
61    __u32 s_alloc_unit_size;
62    __u16 s_align_unit_size;
63    __u8 s_dup_md_flag;
64    struct inode *s_metadata_fe;
65    struct inode *s_mirror_fe;
66    struct inode *s_bitmap_fe;
67};
68
69struct udf_sparing_data {
70    __u16 s_packet_len;
71    struct buffer_head *s_spar_map[4];
72};
73
74struct udf_virtual_data {
75    __u32 s_num_entries;
76    __u16 s_start_offset;
77};
78
79struct udf_bitmap {
80    __u32 s_extLength;
81    __u32 s_extPosition;
82    __u16 s_nr_groups;
83    struct buffer_head **s_block_bitmap;
84};
85
86struct udf_part_map {
87    union {
88        struct udf_bitmap *s_bitmap;
89        struct inode *s_table;
90    } s_uspace;
91    union {
92        struct udf_bitmap *s_bitmap;
93        struct inode *s_table;
94    } s_fspace;
95    __u32 s_partition_root;
96    __u32 s_partition_len;
97    __u16 s_partition_type;
98    __u16 s_partition_num;
99    union {
100        struct udf_sparing_data s_sparing;
101        struct udf_virtual_data s_virtual;
102        struct udf_meta_data s_metadata;
103    } s_type_specific;
104    __u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
105    __u16 s_volumeseqnum;
106    __u16 s_partition_flags;
107};
108
109#pragma pack()
110
111struct udf_sb_info {
112    struct udf_part_map *s_partmaps;
113    __u8 s_volume_ident[32];
114
115    /* Overall info */
116    __u16 s_partitions;
117    __u16 s_partition;
118
119    /* Sector headers */
120    __s32 s_session;
121    __u32 s_anchor;
122    __u32 s_last_block;
123
124    struct buffer_head *s_lvid_bh;
125
126    /* Default permissions */
127    mode_t s_umask;
128    gid_t s_gid;
129    uid_t s_uid;
130    mode_t s_fmode;
131    mode_t s_dmode;
132    /* Lock protecting consistency of above permission settings */
133    rwlock_t s_cred_lock;
134
135    /* Root Info */
136    struct timespec s_record_time;
137
138    /* Fileset Info */
139    __u16 s_serial_number;
140
141    /* highest UDF revision we have recorded to this media */
142    __u16 s_udfrev;
143
144    /* Miscellaneous flags */
145    unsigned long s_flags;
146
147    /* Encoding info */
148    struct nls_table *s_nls_map;
149
150    /* VAT inode */
151    struct inode *s_vat_inode;
152
153    struct mutex s_alloc_mutex;
154    /* Protected by s_alloc_mutex */
155    unsigned int s_lvid_dirty;
156};
157
158static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
159{
160    return sb->s_fs_info;
161}
162
163struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
164
165int udf_compute_nr_groups(struct super_block *sb, u32 partition);
166
167static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
168{
169    return test_bit(flag, &UDF_SB(sb)->s_flags);
170}
171
172static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
173{
174    set_bit(flag, &UDF_SB(sb)->s_flags);
175}
176
177static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
178{
179    clear_bit(flag, &UDF_SB(sb)->s_flags);
180}
181
182#endif /* __LINUX_UDF_SB_H */
183

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