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[] __counted_by(s_nr_groups); |
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 | |
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 | |
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 | |
174 | static inline void UDF_SET_FLAG(struct super_block *sb, int flag) |
175 | { |
176 | set_bit(nr: flag, addr: &UDF_SB(sb)->s_flags); |
177 | } |
178 | |
179 | static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag) |
180 | { |
181 | clear_bit(nr: flag, addr: &UDF_SB(sb)->s_flags); |
182 | } |
183 | |
184 | #endif /* __LINUX_UDF_SB_H */ |
185 | |