GNU Linux-libre 5.19-rc6-gnu
[releases.git] / fs / udf / udf_sb.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_UDF_SB_H
3 #define __LINUX_UDF_SB_H
4
5 #include <linux/mutex.h>
6 #include <linux/bitops.h>
7 #include <linux/magic.h>
8
9 #define UDF_MAX_READ_VERSION            0x0250
10 #define UDF_MAX_WRITE_VERSION           0x0201
11
12 #define UDF_FLAG_USE_EXTENDED_FE        0
13 #define UDF_VERS_USE_EXTENDED_FE        0x0200
14 #define UDF_FLAG_USE_STREAMS            1
15 #define UDF_VERS_USE_STREAMS            0x0200
16 #define UDF_FLAG_USE_SHORT_AD           2
17 #define UDF_FLAG_USE_AD_IN_ICB          3
18 #define UDF_FLAG_USE_FILE_CTIME_EA      4
19 #define UDF_FLAG_STRICT                 5
20 #define UDF_FLAG_UNDELETE               6
21 #define UDF_FLAG_UNHIDE                 7
22 #define UDF_FLAG_VARCONV                8
23 #define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
24 #define UDF_FLAG_GID_FORGET     12
25 #define UDF_FLAG_UID_SET        13
26 #define UDF_FLAG_GID_SET        14
27 #define UDF_FLAG_SESSION_SET    15
28 #define UDF_FLAG_LASTBLOCK_SET  16
29 #define UDF_FLAG_BLOCKSIZE_SET  17
30 #define UDF_FLAG_INCONSISTENT   18
31 #define UDF_FLAG_RW_INCOMPAT    19      /* Set when we find RW incompatible
32                                          * feature */
33
34 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
35 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
36 #define UDF_PART_FLAG_READ_ONLY         0x0010
37 #define UDF_PART_FLAG_WRITE_ONCE        0x0020
38 #define UDF_PART_FLAG_REWRITABLE        0x0040
39 #define UDF_PART_FLAG_OVERWRITABLE      0x0080
40
41 #define UDF_MAX_BLOCK_LOADED    8
42
43 #define UDF_TYPE1_MAP15                 0x1511U
44 #define UDF_VIRTUAL_MAP15               0x1512U
45 #define UDF_VIRTUAL_MAP20               0x2012U
46 #define UDF_SPARABLE_MAP15              0x1522U
47 #define UDF_METADATA_MAP25              0x2511U
48
49 #define UDF_INVALID_MODE                ((umode_t)-1)
50
51 #define MF_DUPLICATE_MD         0x01
52 #define MF_MIRROR_FE_LOADED     0x02
53
54 struct udf_meta_data {
55         __u32   s_meta_file_loc;
56         __u32   s_mirror_file_loc;
57         __u32   s_bitmap_file_loc;
58         __u32   s_alloc_unit_size;
59         __u16   s_align_unit_size;
60         /*
61          * Partition Reference Number of the associated physical / sparable
62          * partition
63          */
64         __u16   s_phys_partition_ref;
65         int     s_flags;
66         struct inode *s_metadata_fe;
67         struct inode *s_mirror_fe;
68         struct inode *s_bitmap_fe;
69 };
70
71 struct udf_sparing_data {
72         __u16   s_packet_len;
73         struct buffer_head *s_spar_map[4];
74 };
75
76 struct udf_virtual_data {
77         __u32   s_num_entries;
78         __u16   s_start_offset;
79 };
80
81 struct udf_bitmap {
82         __u32                   s_extPosition;
83         int                     s_nr_groups;
84         struct buffer_head      *s_block_bitmap[];
85 };
86
87 struct udf_part_map {
88         union {
89                 struct udf_bitmap       *s_bitmap;
90                 struct inode            *s_table;
91         } s_uspace;
92         __u32   s_partition_root;
93         __u32   s_partition_len;
94         __u16   s_partition_type;
95         __u16   s_partition_num;
96         union {
97                 struct udf_sparing_data s_sparing;
98                 struct udf_virtual_data s_virtual;
99                 struct udf_meta_data s_metadata;
100         } s_type_specific;
101         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
102         __u16   s_volumeseqnum;
103         __u16   s_partition_flags;
104 };
105
106 #pragma pack()
107
108 struct udf_sb_info {
109         struct udf_part_map     *s_partmaps;
110         __u8                    s_volume_ident[32];
111
112         /* Overall info */
113         __u16                   s_partitions;
114         __u16                   s_partition;
115
116         /* Sector headers */
117         __s32                   s_session;
118         __u32                   s_anchor;
119         __u32                   s_last_block;
120
121         struct buffer_head      *s_lvid_bh;
122
123         /* Default permissions */
124         umode_t                 s_umask;
125         kgid_t                  s_gid;
126         kuid_t                  s_uid;
127         umode_t                 s_fmode;
128         umode_t                 s_dmode;
129         /* Lock protecting consistency of above permission settings */
130         rwlock_t                s_cred_lock;
131
132         /* Root Info */
133         struct timespec64       s_record_time;
134
135         /* Fileset Info */
136         __u16                   s_serial_number;
137
138         /* highest UDF revision we have recorded to this media */
139         __u16                   s_udfrev;
140
141         /* Miscellaneous flags */
142         unsigned long           s_flags;
143
144         /* Encoding info */
145         struct nls_table        *s_nls_map;
146
147         /* VAT inode */
148         struct inode            *s_vat_inode;
149
150         struct mutex            s_alloc_mutex;
151         /* Protected by s_alloc_mutex */
152         unsigned int            s_lvid_dirty;
153 };
154
155 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
156 {
157         return sb->s_fs_info;
158 }
159
160 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
161
162 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
163
164 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
165 {
166         return test_bit(flag, &UDF_SB(sb)->s_flags);
167 }
168
169 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
170 {
171         set_bit(flag, &UDF_SB(sb)->s_flags);
172 }
173
174 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
175 {
176         clear_bit(flag, &UDF_SB(sb)->s_flags);
177 }
178
179 #endif /* __LINUX_UDF_SB_H */