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 /*
10 * Even UDF 2.6 media should have version <= 0x250 but apparently there are
11 * some broken filesystems with version set to 0x260. Accommodate those.
12 */
13 #define UDF_MAX_READ_VERSION 0x0260
14 #define UDF_MAX_WRITE_VERSION 0x0201
15
16 #define UDF_FLAG_USE_EXTENDED_FE 0
17 #define UDF_VERS_USE_EXTENDED_FE 0x0200
18 #define UDF_FLAG_USE_STREAMS 1
19 #define UDF_VERS_USE_STREAMS 0x0200
20 #define UDF_FLAG_USE_SHORT_AD 2
21 #define UDF_FLAG_USE_AD_IN_ICB 3
22 #define UDF_FLAG_USE_FILE_CTIME_EA 4
23 #define UDF_FLAG_STRICT 5
24 #define UDF_FLAG_UNDELETE 6
25 #define UDF_FLAG_UNHIDE 7
26 #define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
27 #define UDF_FLAG_GID_FORGET 12
28 #define UDF_FLAG_UID_SET 13
29 #define UDF_FLAG_GID_SET 14
30 #define UDF_FLAG_SESSION_SET 15
31 #define UDF_FLAG_LASTBLOCK_SET 16
32 #define UDF_FLAG_BLOCKSIZE_SET 17
33 #define UDF_FLAG_INCONSISTENT 18
34 #define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible
35 * feature */
36
37 #define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
38 #define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
39 #define UDF_PART_FLAG_READ_ONLY 0x0010
40 #define UDF_PART_FLAG_WRITE_ONCE 0x0020
41 #define UDF_PART_FLAG_REWRITABLE 0x0040
42 #define UDF_PART_FLAG_OVERWRITABLE 0x0080
43
44 #define UDF_MAX_BLOCK_LOADED 8
45
46 #define UDF_TYPE1_MAP15 0x1511U
47 #define UDF_VIRTUAL_MAP15 0x1512U
48 #define UDF_VIRTUAL_MAP20 0x2012U
49 #define UDF_SPARABLE_MAP15 0x1522U
50 #define UDF_METADATA_MAP25 0x2511U
51
52 #define UDF_INVALID_MODE ((umode_t)-1)
53
54 #define MF_DUPLICATE_MD 0x01
55 #define MF_MIRROR_FE_LOADED 0x02
56
57 #define EFSCORRUPTED EUCLEAN
58
59 struct udf_meta_data {
60 __u32 s_meta_file_loc;
61 __u32 s_mirror_file_loc;
62 __u32 s_bitmap_file_loc;
63 __u32 s_alloc_unit_size;
64 __u16 s_align_unit_size;
65 /*
66 * Partition Reference Number of the associated physical / sparable
67 * partition
68 */
69 __u16 s_phys_partition_ref;
70 int s_flags;
71 struct inode *s_metadata_fe;
72 struct inode *s_mirror_fe;
73 struct inode *s_bitmap_fe;
74 };
75
76 struct udf_sparing_data {
77 __u16 s_packet_len;
78 struct buffer_head *s_spar_map[4];
79 };
80
81 struct udf_virtual_data {
82 __u32 s_num_entries;
83 __u16 s_start_offset;
84 };
85
86 struct udf_bitmap {
87 __u32 s_extPosition;
88 int s_nr_groups;
89 struct buffer_head *s_block_bitmap[];
90 };
91
92 struct udf_part_map {
93 union {
94 struct udf_bitmap *s_bitmap;
95 struct inode *s_table;
96 } s_uspace;
97 __u32 s_partition_root;
98 __u32 s_partition_len;
99 __u16 s_partition_type;
100 __u16 s_partition_num;
101 union {
102 struct udf_sparing_data s_sparing;
103 struct udf_virtual_data s_virtual;
104 struct udf_meta_data s_metadata;
105 } s_type_specific;
106 __u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
107 __u16 s_volumeseqnum;
108 __u16 s_partition_flags;
109 };
110
111 #pragma pack()
112
113 struct udf_sb_info {
114 struct udf_part_map *s_partmaps;
115 __u8 s_volume_ident[32];
116
117 /* Overall info */
118 __u16 s_partitions;
119 __u16 s_partition;
120
121 /* Sector headers */
122 __s32 s_session;
123 __u32 s_anchor;
124 __u32 s_last_block;
125
126 struct buffer_head *s_lvid_bh;
127
128 /* Default permissions */
129 umode_t s_umask;
130 kgid_t s_gid;
131 kuid_t s_uid;
132 umode_t s_fmode;
133 umode_t s_dmode;
134 /* Lock protecting consistency of above permission settings */
135 rwlock_t s_cred_lock;
136
137 /* Root Info */
138 struct timespec64 s_record_time;
139
140 /* Fileset Info */
141 __u16 s_serial_number;
142
143 /* highest UDF revision we have recorded to this media */
144 __u16 s_udfrev;
145
146 /* Miscellaneous flags */
147 unsigned long s_flags;
148
149 /* Encoding info */
150 struct nls_table *s_nls_map;
151
152 /* VAT inode */
153 struct inode *s_vat_inode;
154
155 struct mutex s_alloc_mutex;
156 /* Protected by s_alloc_mutex */
157 unsigned int s_lvid_dirty;
158 };
159
UDF_SB(struct super_block * sb)160 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
161 {
162 return sb->s_fs_info;
163 }
164
165 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
166
167 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
168
UDF_QUERY_FLAG(struct super_block * sb,int flag)169 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
170 {
171 return test_bit(flag, &UDF_SB(sb)->s_flags);
172 }
173
UDF_SET_FLAG(struct super_block * sb,int flag)174 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
175 {
176 set_bit(flag, &UDF_SB(sb)->s_flags);
177 }
178
UDF_CLEAR_FLAG(struct super_block * sb,int flag)179 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
180 {
181 clear_bit(flag, &UDF_SB(sb)->s_flags);
182 }
183
184 #endif /* __LINUX_UDF_SB_H */
185