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_NLS_MAP 9
24 #define UDF_FLAG_UTF8 10
25 #define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
26 #define UDF_FLAG_GID_FORGET 12
27 #define UDF_FLAG_UID_SET 13
28 #define UDF_FLAG_GID_SET 14
29 #define UDF_FLAG_SESSION_SET 15
30 #define UDF_FLAG_LASTBLOCK_SET 16
31 #define UDF_FLAG_BLOCKSIZE_SET 17
32 #define UDF_FLAG_INCONSISTENT 18
33 #define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible
34 * feature */
35
36 #define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
37 #define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
38 #define UDF_PART_FLAG_READ_ONLY 0x0010
39 #define UDF_PART_FLAG_WRITE_ONCE 0x0020
40 #define UDF_PART_FLAG_REWRITABLE 0x0040
41 #define UDF_PART_FLAG_OVERWRITABLE 0x0080
42
43 #define UDF_MAX_BLOCK_LOADED 8
44
45 #define UDF_TYPE1_MAP15 0x1511U
46 #define UDF_VIRTUAL_MAP15 0x1512U
47 #define UDF_VIRTUAL_MAP20 0x2012U
48 #define UDF_SPARABLE_MAP15 0x1522U
49 #define UDF_METADATA_MAP25 0x2511U
50
51 #define UDF_INVALID_MODE ((umode_t)-1)
52
53 #define MF_DUPLICATE_MD 0x01
54 #define MF_MIRROR_FE_LOADED 0x02
55
56 struct udf_meta_data {
57 __u32 s_meta_file_loc;
58 __u32 s_mirror_file_loc;
59 __u32 s_bitmap_file_loc;
60 __u32 s_alloc_unit_size;
61 __u16 s_align_unit_size;
62 /*
63 * Partition Reference Number of the associated physical / sparable
64 * partition
65 */
66 __u16 s_phys_partition_ref;
67 int s_flags;
68 struct inode *s_metadata_fe;
69 struct inode *s_mirror_fe;
70 struct inode *s_bitmap_fe;
71 };
72
73 struct udf_sparing_data {
74 __u16 s_packet_len;
75 struct buffer_head *s_spar_map[4];
76 };
77
78 struct udf_virtual_data {
79 __u32 s_num_entries;
80 __u16 s_start_offset;
81 };
82
83 struct udf_bitmap {
84 __u32 s_extPosition;
85 int s_nr_groups;
86 struct buffer_head *s_block_bitmap[0];
87 };
88
89 struct udf_part_map {
90 union {
91 struct udf_bitmap *s_bitmap;
92 struct inode *s_table;
93 } s_uspace;
94 __u32 s_partition_root;
95 __u32 s_partition_len;
96 __u16 s_partition_type;
97 __u16 s_partition_num;
98 union {
99 struct udf_sparing_data s_sparing;
100 struct udf_virtual_data s_virtual;
101 struct udf_meta_data s_metadata;
102 } s_type_specific;
103 __u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
104 __u16 s_volumeseqnum;
105 __u16 s_partition_flags;
106 };
107
108 #pragma pack()
109
110 struct udf_sb_info {
111 struct udf_part_map *s_partmaps;
112 __u8 s_volume_ident[32];
113
114 /* Overall info */
115 __u16 s_partitions;
116 __u16 s_partition;
117
118 /* Sector headers */
119 __s32 s_session;
120 __u32 s_anchor;
121 __u32 s_last_block;
122
123 struct buffer_head *s_lvid_bh;
124
125 /* Default permissions */
126 umode_t s_umask;
127 kgid_t s_gid;
128 kuid_t s_uid;
129 umode_t s_fmode;
130 umode_t s_dmode;
131 /* Lock protecting consistency of above permission settings */
132 rwlock_t s_cred_lock;
133
134 /* Root Info */
135 struct timespec64 s_record_time;
136
137 /* Fileset Info */
138 __u16 s_serial_number;
139
140 /* highest UDF revision we have recorded to this media */
141 __u16 s_udfrev;
142
143 /* Miscellaneous flags */
144 unsigned long s_flags;
145
146 /* Encoding info */
147 struct nls_table *s_nls_map;
148
149 /* VAT inode */
150 struct inode *s_vat_inode;
151
152 struct mutex s_alloc_mutex;
153 /* Protected by s_alloc_mutex */
154 unsigned int s_lvid_dirty;
155 };
156
UDF_SB(struct super_block * sb)157 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
158 {
159 return sb->s_fs_info;
160 }
161
162 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
163
164 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
165
UDF_QUERY_FLAG(struct super_block * sb,int flag)166 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
167 {
168 return test_bit(flag, &UDF_SB(sb)->s_flags);
169 }
170
UDF_SET_FLAG(struct super_block * sb,int flag)171 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
172 {
173 set_bit(flag, &UDF_SB(sb)->s_flags);
174 }
175
UDF_CLEAR_FLAG(struct super_block * sb,int flag)176 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
177 {
178 clear_bit(flag, &UDF_SB(sb)->s_flags);
179 }
180
181 #endif /* __LINUX_UDF_SB_H */
182