fs/udf/udf_sb.h

   1 #ifndef __LINUX_UDF_SB_H
   2 #define __LINUX_UDF_SB_H
   3
   4 #include <linux/mutex.h>
   5
   6 /* Since UDF 2.01 is ISO 13346 based... */
   7 #define UDF_SUPER_MAGIC                 0x15013346
   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_NLS_MAP                9
  24 #define UDF_FLAG_UTF8                   10
  25 #define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
  26 #define UDF_FLAG_UID_IGNORE     12    /* use sb uid instead of on disk uid */
  27 #define UDF_FLAG_GID_FORGET     13
  28 #define UDF_FLAG_GID_IGNORE     14
  29 #define UDF_FLAG_UID_SET        15
  30 #define UDF_FLAG_GID_SET        16
  31 #define UDF_FLAG_SESSION_SET    17
  32 #define UDF_FLAG_LASTBLOCK_SET  18
  33 #define UDF_FLAG_BLOCKSIZE_SET  19
  34
  35 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  36 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  37 #define UDF_PART_FLAG_FREED_BITMAP      0x0004
  38 #define UDF_PART_FLAG_FREED_TABLE       0x0008
  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                ((mode_t)-1)
  53
  54 #pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */
  55
  56 struct udf_meta_data {
  57         __u32   s_meta_file_loc;
  58         __u32   s_mirror_file_loc;
  59         __u32   s_bitmap_file_loc;
  60         __u32   s_alloc_unit_size;
  61         __u16   s_align_unit_size;
  62         __u8    s_dup_md_flag;
  63         struct inode *s_metadata_fe;
  64         struct inode *s_mirror_fe;
  65         struct inode *s_bitmap_fe;
  66 };
  67
  68 struct udf_sparing_data {
  69         __u16   s_packet_len;
  70         struct buffer_head *s_spar_map[4];
  71 };
  72
  73 struct udf_virtual_data {
  74         __u32   s_num_entries;
  75         __u16   s_start_offset;
  76 };
  77
  78 struct udf_bitmap {
  79         __u32                   s_extLength;
  80         __u32                   s_extPosition;
  81         __u16                   s_nr_groups;
  82         struct buffer_head      **s_block_bitmap;
  83 };
  84
  85 struct udf_part_map {
  86         union {
  87                 struct udf_bitmap       *s_bitmap;
  88                 struct inode            *s_table;
  89         } s_uspace;
  90         union {
  91                 struct udf_bitmap       *s_bitmap;
  92                 struct inode            *s_table;
  93         } s_fspace;
  94         __u32   s_partition_root;
  95         __u32   s_partition_len;
  96         __u16   s_partition_type;
  97         __u16   s_partition_num;
  98         union {
  99                 struct udf_sparing_data s_sparing;
 100                 struct udf_virtual_data s_virtual;
 101                 struct udf_meta_data s_metadata;
 102         } s_type_specific;
 103         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 104         __u16   s_volumeseqnum;
 105         __u16   s_partition_flags;
 106 };
 107
 108 #pragma pack()
 109
 110 struct udf_sb_info {
 111         struct udf_part_map     *s_partmaps;
 112         __u8                    s_volume_ident[32];
 113
 114         /* Overall info */
 115         __u16                   s_partitions;
 116         __u16                   s_partition;
 117
 118         /* Sector headers */
 119         __s32                   s_session;
 120         __u32                   s_anchor;
 121         __u32                   s_last_block;
 122
 123         struct buffer_head      *s_lvid_bh;
 124
 125         /* Default permissions */
 126         mode_t                  s_umask;
 127         gid_t                   s_gid;
 128         uid_t                   s_uid;
 129         mode_t                  s_fmode;
 130         mode_t                  s_dmode;
 131
 132         /* Root Info */
 133         struct timespec         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         __u32                   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 udf_sb_info *sbi);
 161
 162 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 163
 164 #define UDF_QUERY_FLAG(X,Y)                     ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
 165 #define UDF_SET_FLAG(X,Y)                       ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
 166 #define UDF_CLEAR_FLAG(X,Y)                     ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )
 167
 168 #endif /* __LINUX_UDF_SB_H */