s390/stacktrace: Improve detection of invalid instruction pointers
[linux-2.6-block.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 /*
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_NOVRS                  8
27 #define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
28 #define UDF_FLAG_GID_FORGET     12
29 #define UDF_FLAG_UID_SET        13
30 #define UDF_FLAG_GID_SET        14
31 #define UDF_FLAG_SESSION_SET    15
32 #define UDF_FLAG_LASTBLOCK_SET  16
33 #define UDF_FLAG_BLOCKSIZE_SET  17
34 #define UDF_FLAG_INCONSISTENT   18
35 #define UDF_FLAG_RW_INCOMPAT    19      /* Set when we find RW incompatible
36                                          * feature */
37
38 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
39 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
40 #define UDF_PART_FLAG_READ_ONLY         0x0010
41 #define UDF_PART_FLAG_WRITE_ONCE        0x0020
42 #define UDF_PART_FLAG_REWRITABLE        0x0040
43 #define UDF_PART_FLAG_OVERWRITABLE      0x0080
44
45 #define UDF_MAX_BLOCK_LOADED    8
46
47 #define UDF_TYPE1_MAP15                 0x1511U
48 #define UDF_VIRTUAL_MAP15               0x1512U
49 #define UDF_VIRTUAL_MAP20               0x2012U
50 #define UDF_SPARABLE_MAP15              0x1522U
51 #define UDF_METADATA_MAP25              0x2511U
52
53 #define UDF_INVALID_MODE                ((umode_t)-1)
54
55 #define MF_DUPLICATE_MD         0x01
56 #define MF_MIRROR_FE_LOADED     0x02
57
58 #define EFSCORRUPTED EUCLEAN
59
60 struct udf_meta_data {
61         __u32   s_meta_file_loc;
62         __u32   s_mirror_file_loc;
63         __u32   s_bitmap_file_loc;
64         __u32   s_alloc_unit_size;
65         __u16   s_align_unit_size;
66         /*
67          * Partition Reference Number of the associated physical / sparable
68          * partition
69          */
70         __u16   s_phys_partition_ref;
71         int     s_flags;
72         struct inode *s_metadata_fe;
73         struct inode *s_mirror_fe;
74         struct inode *s_bitmap_fe;
75 };
76
77 struct udf_sparing_data {
78         __u16   s_packet_len;
79         struct buffer_head *s_spar_map[4];
80 };
81
82 struct udf_virtual_data {
83         __u32   s_num_entries;
84         __u16   s_start_offset;
85 };
86
87 struct udf_bitmap {
88         __u32                   s_extPosition;
89         int                     s_nr_groups;
90         struct buffer_head      *s_block_bitmap[] __counted_by(s_nr_groups);
91 };
92
93 struct udf_part_map {
94         union {
95                 struct udf_bitmap       *s_bitmap;
96                 struct inode            *s_table;
97         } s_uspace;
98         __u32   s_partition_root;
99         __u32   s_partition_len;
100         __u16   s_partition_type;
101         __u16   s_partition_num;
102         union {
103                 struct udf_sparing_data s_sparing;
104                 struct udf_virtual_data s_virtual;
105                 struct udf_meta_data s_metadata;
106         } s_type_specific;
107         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
108         __u16   s_volumeseqnum;
109         __u16   s_partition_flags;
110 };
111
112 #pragma pack()
113
114 struct udf_sb_info {
115         struct udf_part_map     *s_partmaps;
116         __u8                    s_volume_ident[32];
117
118         /* Overall info */
119         __u16                   s_partitions;
120         __u16                   s_partition;
121
122         /* Sector headers */
123         __s32                   s_session;
124         __u32                   s_anchor;
125         __u32                   s_last_block;
126
127         struct buffer_head      *s_lvid_bh;
128
129         /* Default permissions */
130         umode_t                 s_umask;
131         kgid_t                  s_gid;
132         kuid_t                  s_uid;
133         umode_t                 s_fmode;
134         umode_t                 s_dmode;
135         /* Lock protecting consistency of above permission settings */
136         rwlock_t                s_cred_lock;
137
138         /* Root Info */
139         struct timespec64       s_record_time;
140
141         /* Fileset Info */
142         __u16                   s_serial_number;
143
144         /* highest UDF revision we have recorded to this media */
145         __u16                   s_udfrev;
146
147         /* Miscellaneous flags */
148         unsigned long           s_flags;
149
150         /* Encoding info */
151         struct nls_table        *s_nls_map;
152
153         /* VAT inode */
154         struct inode            *s_vat_inode;
155
156         struct mutex            s_alloc_mutex;
157         /* Protected by s_alloc_mutex */
158         unsigned int            s_lvid_dirty;
159 };
160
161 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
162 {
163         return sb->s_fs_info;
164 }
165
166 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
167
168 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
169
170 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
171 {
172         return test_bit(flag, &UDF_SB(sb)->s_flags);
173 }
174
175 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
176 {
177         set_bit(flag, &UDF_SB(sb)->s_flags);
178 }
179
180 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
181 {
182         clear_bit(flag, &UDF_SB(sb)->s_flags);
183 }
184
185 #endif /* __LINUX_UDF_SB_H */