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 #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
 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
 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
 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
 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 */