zonefs: Detect append writes at invalid locations
[linux-2.6-microblaze.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_VARCONV                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 struct udf_meta_data {
59         __u32   s_meta_file_loc;
60         __u32   s_mirror_file_loc;
61         __u32   s_bitmap_file_loc;
62         __u32   s_alloc_unit_size;
63         __u16   s_align_unit_size;
64         /*
65          * Partition Reference Number of the associated physical / sparable
66          * partition
67          */
68         __u16   s_phys_partition_ref;
69         int     s_flags;
70         struct inode *s_metadata_fe;
71         struct inode *s_mirror_fe;
72         struct inode *s_bitmap_fe;
73 };
74
75 struct udf_sparing_data {
76         __u16   s_packet_len;
77         struct buffer_head *s_spar_map[4];
78 };
79
80 struct udf_virtual_data {
81         __u32   s_num_entries;
82         __u16   s_start_offset;
83 };
84
85 struct udf_bitmap {
86         __u32                   s_extPosition;
87         int                     s_nr_groups;
88         struct buffer_head      *s_block_bitmap[];
89 };
90
91 struct udf_part_map {
92         union {
93                 struct udf_bitmap       *s_bitmap;
94                 struct inode            *s_table;
95         } s_uspace;
96         __u32   s_partition_root;
97         __u32   s_partition_len;
98         __u16   s_partition_type;
99         __u16   s_partition_num;
100         union {
101                 struct udf_sparing_data s_sparing;
102                 struct udf_virtual_data s_virtual;
103                 struct udf_meta_data s_metadata;
104         } s_type_specific;
105         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
106         __u16   s_volumeseqnum;
107         __u16   s_partition_flags;
108 };
109
110 #pragma pack()
111
112 struct udf_sb_info {
113         struct udf_part_map     *s_partmaps;
114         __u8                    s_volume_ident[32];
115
116         /* Overall info */
117         __u16                   s_partitions;
118         __u16                   s_partition;
119
120         /* Sector headers */
121         __s32                   s_session;
122         __u32                   s_anchor;
123         __u32                   s_last_block;
124
125         struct buffer_head      *s_lvid_bh;
126
127         /* Default permissions */
128         umode_t                 s_umask;
129         kgid_t                  s_gid;
130         kuid_t                  s_uid;
131         umode_t                 s_fmode;
132         umode_t                 s_dmode;
133         /* Lock protecting consistency of above permission settings */
134         rwlock_t                s_cred_lock;
135
136         /* Root Info */
137         struct timespec64       s_record_time;
138
139         /* Fileset Info */
140         __u16                   s_serial_number;
141
142         /* highest UDF revision we have recorded to this media */
143         __u16                   s_udfrev;
144
145         /* Miscellaneous flags */
146         unsigned long           s_flags;
147
148         /* Encoding info */
149         struct nls_table        *s_nls_map;
150
151         /* VAT inode */
152         struct inode            *s_vat_inode;
153
154         struct mutex            s_alloc_mutex;
155         /* Protected by s_alloc_mutex */
156         unsigned int            s_lvid_dirty;
157 };
158
159 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
160 {
161         return sb->s_fs_info;
162 }
163
164 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
165
166 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
167
168 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
169 {
170         return test_bit(flag, &UDF_SB(sb)->s_flags);
171 }
172
173 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
174 {
175         set_bit(flag, &UDF_SB(sb)->s_flags);
176 }
177
178 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
179 {
180         clear_bit(flag, &UDF_SB(sb)->s_flags);
181 }
182
183 #endif /* __LINUX_UDF_SB_H */