LXR linux/fs/udf/udf

   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
  56struct 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
  68struct udf_sparing_data {
  69        __u16   s_packet_len;
  70        struct buffer_head *s_spar_map[4];
  71};
  72
  73struct udf_virtual_data {
  74        __u32   s_num_entries;
  75        __u16   s_start_offset;
  76};
  77
  78struct udf_bitmap {
  79        __u32                   s_extLength;
  80        __u32                   s_extPosition;
  81        __u16                   s_nr_groups;
  82        struct buffer_head      **s_block_bitmap;
  83};
  84
  85struct 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
 110struct 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
 155static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 156{
 157        return sb->s_fs_info;
 158}
 159
 160struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
 161
 162int 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 */
 169