Merge branch 'master' into for-next
[pandora-kernel.git] / 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
57 struct 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
69 struct udf_sparing_data {
70         __u16   s_packet_len;
71         struct buffer_head *s_spar_map[4];
72 };
73
74 struct udf_virtual_data {
75         __u32   s_num_entries;
76         __u16   s_start_offset;
77 };
78
79 struct udf_bitmap {
80         __u32                   s_extLength;
81         __u32                   s_extPosition;
82         __u16                   s_nr_groups;
83         struct buffer_head      **s_block_bitmap;
84 };
85
86 struct 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
111 struct 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
158 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
159 {
160         return sb->s_fs_info;
161 }
162
163 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
164
165 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
166
167 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
168 {
169         return test_bit(flag, &UDF_SB(sb)->s_flags);
170 }
171
172 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
173 {
174         set_bit(flag, &UDF_SB(sb)->s_flags);
175 }
176
177 static 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 */