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
  34 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  35 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  36 #define UDF_PART_FLAG_FREED_BITMAP      0x0004
  37 #define UDF_PART_FLAG_FREED_TABLE       0x0008
  38 #define UDF_PART_FLAG_READ_ONLY         0x0010
  39 #define UDF_PART_FLAG_WRITE_ONCE        0x0020
  40 #define UDF_PART_FLAG_REWRITABLE        0x0040
  41 #define UDF_PART_FLAG_OVERWRITABLE      0x0080
  42
  43 #define UDF_MAX_BLOCK_LOADED    8
  44
  45 #define UDF_TYPE1_MAP15                 0x1511U
  46 #define UDF_VIRTUAL_MAP15               0x1512U
  47 #define UDF_VIRTUAL_MAP20               0x2012U
  48 #define UDF_SPARABLE_MAP15              0x1522U
  49 #define UDF_METADATA_MAP25              0x2511U
  50
  51 #pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */
  52
  53 struct udf_meta_data {
  54         __u32   s_meta_file_loc;
  55         __u32   s_mirror_file_loc;
  56         __u32   s_bitmap_file_loc;
  57         __u32   s_alloc_unit_size;
  58         __u16   s_align_unit_size;
  59         __u8    s_dup_md_flag;
  60         struct inode *s_metadata_fe;
  61         struct inode *s_mirror_fe;
  62         struct inode *s_bitmap_fe;
  63 };
  64
  65 struct udf_sparing_data {
  66         __u16   s_packet_len;
  67         struct buffer_head *s_spar_map[4];
  68 };
  69
  70 struct udf_virtual_data {
  71         __u32   s_num_entries;
  72         __u16   s_start_offset;
  73 };
  74
  75 struct udf_bitmap {
  76         __u32                   s_extLength;
  77         __u32                   s_extPosition;
  78         __u16                   s_nr_groups;
  79         struct buffer_head      **s_block_bitmap;
  80 };
  81
  82 struct udf_part_map {
  83         union {
  84                 struct udf_bitmap       *s_bitmap;
  85                 struct inode            *s_table;
  86         } s_uspace;
  87         union {
  88                 struct udf_bitmap       *s_bitmap;
  89                 struct inode            *s_table;
  90         } s_fspace;
  91         __u32   s_partition_root;
  92         __u32   s_partition_len;
  93         __u16   s_partition_type;
  94         __u16   s_partition_num;
  95         union {
  96                 struct udf_sparing_data s_sparing;
  97                 struct udf_virtual_data s_virtual;
  98                 struct udf_meta_data s_metadata;
  99         } s_type_specific;
 100         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 101         __u16   s_volumeseqnum;
 102         __u16   s_partition_flags;
 103 };
 104
 105 #pragma pack()
 106
 107 struct udf_sb_info {
 108         struct udf_part_map     *s_partmaps;
 109         __u8                    s_volume_ident[32];
 110
 111         /* Overall info */
 112         __u16                   s_partitions;
 113         __u16                   s_partition;
 114
 115         /* Sector headers */
 116         __s32                   s_session;
 117         __u32                   s_anchor[3];
 118         __u32                   s_last_block;
 119
 120         struct buffer_head      *s_lvid_bh;
 121
 122         /* Default permissions */
 123         mode_t                  s_umask;
 124         gid_t                   s_gid;
 125         uid_t                   s_uid;
 126
 127         /* Root Info */
 128         struct timespec         s_record_time;
 129
 130         /* Fileset Info */
 131         __u16                   s_serial_number;
 132
 133         /* highest UDF revision we have recorded to this media */
 134         __u16                   s_udfrev;
 135
 136         /* Miscellaneous flags */
 137         __u32                   s_flags;
 138
 139         /* Encoding info */
 140         struct nls_table        *s_nls_map;
 141
 142         /* VAT inode */
 143         struct inode            *s_vat_inode;
 144
 145         struct mutex            s_alloc_mutex;
 146 };
 147
 148 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 149 {
 150         return sb->s_fs_info;
 151 }
 152
 153 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
 154
 155 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 156
 157 #define UDF_QUERY_FLAG(X,Y)                     ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
 158 #define UDF_SET_FLAG(X,Y)                       ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
 159 #define UDF_CLEAR_FLAG(X,Y)                     ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )
 160
 161 #endif /* __LINUX_UDF_SB_H */