fs/udf/udf_sb.h

   1 #ifndef __LINUX_UDF_SB_H
   2 #define __LINUX_UDF_SB_H
   3
   4 /* Since UDF 2.01 is ISO 13346 based... */
   5 #define UDF_SUPER_MAGIC                 0x15013346
   6
   7 #define UDF_MAX_READ_VERSION            0x0201
   8 #define UDF_MAX_WRITE_VERSION           0x0201
   9
  10 #define UDF_FLAG_USE_EXTENDED_FE        0
  11 #define UDF_VERS_USE_EXTENDED_FE        0x0200
  12 #define UDF_FLAG_USE_STREAMS            1
  13 #define UDF_VERS_USE_STREAMS            0x0200
  14 #define UDF_FLAG_USE_SHORT_AD           2
  15 #define UDF_FLAG_USE_AD_IN_ICB          3
  16 #define UDF_FLAG_USE_FILE_CTIME_EA      4
  17 #define UDF_FLAG_STRICT                 5
  18 #define UDF_FLAG_UNDELETE               6
  19 #define UDF_FLAG_UNHIDE                 7
  20 #define UDF_FLAG_VARCONV                8
  21 #define UDF_FLAG_NLS_MAP                9
  22 #define UDF_FLAG_UTF8                   10
  23
  24 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  25 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  26 #define UDF_PART_FLAG_FREED_BITMAP      0x0004
  27 #define UDF_PART_FLAG_FREED_TABLE       0x0008
  28 #define UDF_PART_FLAG_READ_ONLY         0x0010
  29 #define UDF_PART_FLAG_WRITE_ONCE        0x0020
  30 #define UDF_PART_FLAG_REWRITABLE        0x0040
  31 #define UDF_PART_FLAG_OVERWRITABLE      0x0080
  32
  33 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
  34 {
  35         return sb->s_fs_info;
  36 }
  37
  38 #define UDF_SB_FREE(X)\
  39 {\
  40         if (UDF_SB(X))\
  41         {\
  42                 if (UDF_SB_PARTMAPS(X))\
  43                         kfree(UDF_SB_PARTMAPS(X));\
  44                 UDF_SB_PARTMAPS(X) = NULL;\
  45         }\
  46 }
  47
  48 #define UDF_SB_ALLOC_PARTMAPS(X,Y)\
  49 {\
  50         UDF_SB_PARTMAPS(X) = kmalloc(sizeof(struct udf_part_map) * Y, GFP_KERNEL);\
  51         if (UDF_SB_PARTMAPS(X) != NULL)\
  52         {\
  53                 UDF_SB_NUMPARTS(X) = Y;\
  54                 memset(UDF_SB_PARTMAPS(X), 0x00, sizeof(struct udf_part_map) * Y);\
  55         }\
  56         else\
  57         {\
  58                 UDF_SB_NUMPARTS(X) = 0;\
  59                 udf_error(X, __FUNCTION__, "Unable to allocate space for %d partition maps", Y);\
  60         }\
  61 }
  62
  63 #define UDF_SB_ALLOC_BITMAP(X,Y,Z)\
  64 {\
  65         int nr_groups = ((UDF_SB_PARTLEN((X),(Y)) + (sizeof(struct spaceBitmapDesc) << 3) +\
  66                 ((X)->s_blocksize * 8) - 1) / ((X)->s_blocksize * 8));\
  67         int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
  68         if (size <= PAGE_SIZE)\
  69                 UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap = kmalloc(size, GFP_KERNEL);\
  70         else\
  71                 UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap = vmalloc(size);\
  72         if (UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap != NULL)\
  73         {\
  74                 memset(UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap, 0x00, size);\
  75                 UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_block_bitmap =\
  76                         (struct buffer_head **)(UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap + 1);\
  77                 UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_nr_groups = nr_groups;\
  78         }\
  79         else\
  80         {\
  81                 udf_error(X, __FUNCTION__, "Unable to allocate space for bitmap and %d buffer_head pointers", nr_groups);\
  82         }\
  83 }
  84
  85 #define UDF_SB_FREE_BITMAP(X,Y,Z)\
  86 {\
  87         int i;\
  88         int nr_groups = UDF_SB_BITMAP_NR_GROUPS(X,Y,Z);\
  89         int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
  90         for (i=0; i<nr_groups; i++)\
  91         {\
  92                 if (UDF_SB_BITMAP(X,Y,Z,i))\
  93                         udf_release_data(UDF_SB_BITMAP(X,Y,Z,i));\
  94         }\
  95         if (size <= PAGE_SIZE)\
  96                 kfree(UDF_SB_PARTMAPS(X)[Y].Z.s_bitmap);\
  97         else\
  98                 vfree(UDF_SB_PARTMAPS(X)[Y].Z.s_bitmap);\
  99 }
 100
 101 #define UDF_QUERY_FLAG(X,Y)                     ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
 102 #define UDF_SET_FLAG(X,Y)                       ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
 103 #define UDF_CLEAR_FLAG(X,Y)                     ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )
 104
 105 #define UDF_UPDATE_UDFREV(X,Y)                  ( ((Y) > UDF_SB_UDFREV(X)) ? UDF_SB_UDFREV(X) = (Y) : UDF_SB_UDFREV(X) )
 106
 107 #define UDF_SB_PARTMAPS(X)                      ( UDF_SB(X)->s_partmaps )
 108 #define UDF_SB_PARTTYPE(X,Y)                    ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_type )
 109 #define UDF_SB_PARTROOT(X,Y)                    ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_root )
 110 #define UDF_SB_PARTLEN(X,Y)                     ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_len )
 111 #define UDF_SB_PARTVSN(X,Y)                     ( UDF_SB_PARTMAPS(X)[(Y)].s_volumeseqnum )
 112 #define UDF_SB_PARTNUM(X,Y)                     ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_num )
 113 #define UDF_SB_TYPESPAR(X,Y)                    ( UDF_SB_PARTMAPS(X)[(Y)].s_type_specific.s_sparing )
 114 #define UDF_SB_TYPEVIRT(X,Y)                    ( UDF_SB_PARTMAPS(X)[(Y)].s_type_specific.s_virtual )
 115 #define UDF_SB_PARTFUNC(X,Y)                    ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_func )
 116 #define UDF_SB_PARTFLAGS(X,Y)                   ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_flags )
 117 #define UDF_SB_BITMAP(X,Y,Z,I)                  ( UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_block_bitmap[I] )
 118 #define UDF_SB_BITMAP_NR_GROUPS(X,Y,Z)          ( UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_nr_groups )
 119
 120 #define UDF_SB_VOLIDENT(X)                      ( UDF_SB(X)->s_volident )
 121 #define UDF_SB_NUMPARTS(X)                      ( UDF_SB(X)->s_partitions )
 122 #define UDF_SB_PARTITION(X)                     ( UDF_SB(X)->s_partition )
 123 #define UDF_SB_SESSION(X)                       ( UDF_SB(X)->s_session )
 124 #define UDF_SB_ANCHOR(X)                        ( UDF_SB(X)->s_anchor )
 125 #define UDF_SB_LASTBLOCK(X)                     ( UDF_SB(X)->s_lastblock )
 126 #define UDF_SB_LVIDBH(X)                        ( UDF_SB(X)->s_lvidbh )
 127 #define UDF_SB_LVID(X)                          ( (struct logicalVolIntegrityDesc *)UDF_SB_LVIDBH(X)->b_data )
 128 #define UDF_SB_LVIDIU(X)                        ( (struct logicalVolIntegrityDescImpUse *)&(UDF_SB_LVID(X)->impUse[le32_to_cpu(UDF_SB_LVID(X)->numOfPartitions) * 2 * sizeof(uint32_t)/sizeof(uint8_t)]) )
 129
 130 #define UDF_SB_UMASK(X)                         ( UDF_SB(X)->s_umask )
 131 #define UDF_SB_GID(X)                           ( UDF_SB(X)->s_gid )
 132 #define UDF_SB_UID(X)                           ( UDF_SB(X)->s_uid )
 133 #define UDF_SB_RECORDTIME(X)                    ( UDF_SB(X)->s_recordtime )
 134 #define UDF_SB_SERIALNUM(X)                     ( UDF_SB(X)->s_serialnum )
 135 #define UDF_SB_UDFREV(X)                        ( UDF_SB(X)->s_udfrev )
 136 #define UDF_SB_FLAGS(X)                         ( UDF_SB(X)->s_flags )
 137 #define UDF_SB_VAT(X)                           ( UDF_SB(X)->s_vat )
 138
 139 #endif /* __LINUX_UDF_SB_H */