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   1 /*
   2  * udf_fs_sb.h
   3  *
   4  * This include file is for the Linux kernel/module.
   5  *
   6  * COPYRIGHT
   7  *      This file is distributed under the terms of the GNU General Public
   8  *      License (GPL). Copies of the GPL can be obtained from:
   9  *              ftp://prep.ai.mit.edu/pub/gnu/GPL
  10  *      Each contributing author retains all rights to their own work.
  11  */
  12
  13 #ifndef _UDF_FS_SB_H
  14 #define _UDF_FS_SB_H 1
  15
  16 #include <linux/mutex.h>
  17
  18 #pragma pack(1)
  19
  20 #define UDF_MAX_BLOCK_LOADED    8
  21
  22 #define UDF_TYPE1_MAP15                 0x1511U
  23 #define UDF_VIRTUAL_MAP15               0x1512U
  24 #define UDF_VIRTUAL_MAP20               0x2012U
  25 #define UDF_SPARABLE_MAP15              0x1522U
  26
  27 struct udf_sparing_data
  28 {
  29         __u16   s_packet_len;
  30         struct buffer_head *s_spar_map[4];
  31 };
  32
  33 struct udf_virtual_data
  34 {
  35         __u32   s_num_entries;
  36         __u16   s_start_offset;
  37 };
  38
  39 struct udf_bitmap
  40 {
  41         __u32                   s_extLength;
  42         __u32                   s_extPosition;
  43         __u16                   s_nr_groups;
  44         struct buffer_head      **s_block_bitmap;
  45 };
  46
  47 struct udf_part_map
  48 {
  49         union
  50         {
  51                 struct udf_bitmap       *s_bitmap;
  52                 struct inode            *s_table;
  53         } s_uspace;
  54         union
  55         {
  56                 struct udf_bitmap       *s_bitmap;
  57                 struct inode            *s_table;
  58         } s_fspace;
  59         __u32   s_partition_root;
  60         __u32   s_partition_len;
  61         __u16   s_partition_type;
  62         __u16   s_partition_num;
  63         union
  64         {
  65                 struct udf_sparing_data s_sparing;
  66                 struct udf_virtual_data s_virtual;
  67         } s_type_specific;
  68         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
  69         __u16   s_volumeseqnum;
  70         __u16   s_partition_flags;
  71 };
  72
  73 #pragma pack()
  74
  75 struct udf_sb_info
  76 {
  77         struct udf_part_map     *s_partmaps;
  78         __u8                    s_volident[32];
  79
  80         /* Overall info */
  81         __u16                   s_partitions;
  82         __u16                   s_partition;
  83
  84         /* Sector headers */
  85         __s32                   s_session;
  86         __u32                   s_anchor[4];
  87         __u32                   s_lastblock;
  88
  89         struct buffer_head      *s_lvidbh;
  90
  91         /* Default permissions */
  92         mode_t                  s_umask;
  93         gid_t                   s_gid;
  94         uid_t                   s_uid;
  95
  96         /* Root Info */
  97         struct timespec         s_recordtime;
  98
  99         /* Fileset Info */
 100         __u16                   s_serialnum;
 101
 102         /* highest UDF revision we have recorded to this media */
 103         __u16                   s_udfrev;
 104
 105         /* Miscellaneous flags */
 106         __u32                   s_flags;
 107
 108         /* Encoding info */
 109         struct nls_table        *s_nls_map;
 110
 111         /* VAT inode */
 112         struct inode            *s_vat;
 113
 114         struct mutex            s_alloc_mutex;
 115 };
 116
 117 #endif /* _UDF_FS_SB_H */