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
UDF_SB(struct super_block * sb)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
UDF_QUERY_FLAG(struct super_block * sb,int flag)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
UDF_SET_FLAG(struct super_block * sb,int flag)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
UDF_CLEAR_FLAG(struct super_block * sb,int flag)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 */
180