linux/fs/udf/udf_sb.h
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   1#ifndef __LINUX_UDF_SB_H
   2#define __LINUX_UDF_SB_H
   3
   4#include <linux/mutex.h>
   5#include <linux/bitops.h>
   6
   7/* Since UDF 2.01 is ISO 13346 based... */
   8#define UDF_SUPER_MAGIC                 0x15013346
   9
  10#define UDF_MAX_READ_VERSION            0x0250
  11#define UDF_MAX_WRITE_VERSION           0x0201
  12
  13#define UDF_FLAG_USE_EXTENDED_FE        0
  14#define UDF_VERS_USE_EXTENDED_FE        0x0200
  15#define UDF_FLAG_USE_STREAMS            1
  16#define UDF_VERS_USE_STREAMS            0x0200
  17#define UDF_FLAG_USE_SHORT_AD           2
  18#define UDF_FLAG_USE_AD_IN_ICB          3
  19#define UDF_FLAG_USE_FILE_CTIME_EA      4
  20#define UDF_FLAG_STRICT                 5
  21#define UDF_FLAG_UNDELETE               6
  22#define UDF_FLAG_UNHIDE                 7
  23#define UDF_FLAG_VARCONV                8
  24#define UDF_FLAG_NLS_MAP                9
  25#define UDF_FLAG_UTF8                   10
  26#define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
  27#define UDF_FLAG_UID_IGNORE     12    /* use sb uid instead of on disk uid */
  28#define UDF_FLAG_GID_FORGET     13
  29#define UDF_FLAG_GID_IGNORE     14
  30#define UDF_FLAG_UID_SET        15
  31#define UDF_FLAG_GID_SET        16
  32#define UDF_FLAG_SESSION_SET    17
  33#define UDF_FLAG_LASTBLOCK_SET  18
  34#define UDF_FLAG_BLOCKSIZE_SET  19
  35
  36#define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  37#define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  38#define UDF_PART_FLAG_FREED_BITMAP      0x0004
  39#define UDF_PART_FLAG_FREED_TABLE       0x0008
  40#define UDF_PART_FLAG_READ_ONLY         0x0010
  41#define UDF_PART_FLAG_WRITE_ONCE        0x0020
  42#define UDF_PART_FLAG_REWRITABLE        0x0040
  43#define UDF_PART_FLAG_OVERWRITABLE      0x0080
  44
  45#define UDF_MAX_BLOCK_LOADED    8
  46
  47#define UDF_TYPE1_MAP15                 0x1511U
  48#define UDF_VIRTUAL_MAP15               0x1512U
  49#define UDF_VIRTUAL_MAP20               0x2012U
  50#define UDF_SPARABLE_MAP15              0x1522U
  51#define UDF_METADATA_MAP25              0x2511U
  52
  53#define UDF_INVALID_MODE                ((umode_t)-1)
  54
  55#pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */
  56
  57#define MF_DUPLICATE_MD         0x01
  58#define MF_MIRROR_FE_LOADED     0x02
  59
  60struct udf_meta_data {
  61        __u32   s_meta_file_loc;
  62        __u32   s_mirror_file_loc;
  63        __u32   s_bitmap_file_loc;
  64        __u32   s_alloc_unit_size;
  65        __u16   s_align_unit_size;
  66        int     s_flags;
  67        struct inode *s_metadata_fe;
  68        struct inode *s_mirror_fe;
  69        struct inode *s_bitmap_fe;
  70};
  71
  72struct udf_sparing_data {
  73        __u16   s_packet_len;
  74        struct buffer_head *s_spar_map[4];
  75};
  76
  77struct udf_virtual_data {
  78        __u32   s_num_entries;
  79        __u16   s_start_offset;
  80};
  81
  82struct udf_bitmap {
  83        __u32                   s_extPosition;
  84        int                     s_nr_groups;
  85        struct buffer_head      *s_block_bitmap[0];
  86};
  87
  88struct udf_part_map {
  89        union {
  90                struct udf_bitmap       *s_bitmap;
  91                struct inode            *s_table;
  92        } s_uspace;
  93        union {
  94                struct udf_bitmap       *s_bitmap;
  95                struct inode            *s_table;
  96        } s_fspace;
  97        __u32   s_partition_root;
  98        __u32   s_partition_len;
  99        __u16   s_partition_type;
 100        __u16   s_partition_num;
 101        union {
 102                struct udf_sparing_data s_sparing;
 103                struct udf_virtual_data s_virtual;
 104                struct udf_meta_data s_metadata;
 105        } s_type_specific;
 106        __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 107        __u16   s_volumeseqnum;
 108        __u16   s_partition_flags;
 109};
 110
 111#pragma pack()
 112
 113struct udf_sb_info {
 114        struct udf_part_map     *s_partmaps;
 115        __u8                    s_volume_ident[32];
 116
 117        /* Overall info */
 118        __u16                   s_partitions;
 119        __u16                   s_partition;
 120
 121        /* Sector headers */
 122        __s32                   s_session;
 123        __u32                   s_anchor;
 124        __u32                   s_last_block;
 125
 126        struct buffer_head      *s_lvid_bh;
 127
 128        /* Default permissions */
 129        umode_t                 s_umask;
 130        kgid_t                  s_gid;
 131        kuid_t                  s_uid;
 132        umode_t                 s_fmode;
 133        umode_t                 s_dmode;
 134        /* Lock protecting consistency of above permission settings */
 135        rwlock_t                s_cred_lock;
 136
 137        /* Root Info */
 138        struct timespec         s_record_time;
 139
 140        /* Fileset Info */
 141        __u16                   s_serial_number;
 142
 143        /* highest UDF revision we have recorded to this media */
 144        __u16                   s_udfrev;
 145
 146        /* Miscellaneous flags */
 147        unsigned long           s_flags;
 148
 149        /* Encoding info */
 150        struct nls_table        *s_nls_map;
 151
 152        /* VAT inode */
 153        struct inode            *s_vat_inode;
 154
 155        struct mutex            s_alloc_mutex;
 156        /* Protected by s_alloc_mutex */
 157        unsigned int            s_lvid_dirty;
 158};
 159
 160static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 161{
 162        return sb->s_fs_info;
 163}
 164
 165struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
 166
 167int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 168
 169static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 170{
 171        return test_bit(flag, &UDF_SB(sb)->s_flags);
 172}
 173
 174static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 175{
 176        set_bit(flag, &UDF_SB(sb)->s_flags);
 177}
 178
 179static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
 180{
 181        clear_bit(flag, &UDF_SB(sb)->s_flags);
 182}
 183
 184#endif /* __LINUX_UDF_SB_H */
 185
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