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_extLength;
  84        __u32                   s_extPosition;
  85        __u16                   s_nr_groups;
  86        struct buffer_head      **s_block_bitmap;
  87};
  88
  89struct udf_part_map {
  90        union {
  91                struct udf_bitmap       *s_bitmap;
  92                struct inode            *s_table;
  93        } s_uspace;
  94        union {
  95                struct udf_bitmap       *s_bitmap;
  96                struct inode            *s_table;
  97        } s_fspace;
  98        __u32   s_partition_root;
  99        __u32   s_partition_len;
 100        __u16   s_partition_type;
 101        __u16   s_partition_num;
 102        union {
 103                struct udf_sparing_data s_sparing;
 104                struct udf_virtual_data s_virtual;
 105                struct udf_meta_data s_metadata;
 106        } s_type_specific;
 107        __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 108        __u16   s_volumeseqnum;
 109        __u16   s_partition_flags;
 110};
 111
 112#pragma pack()
 113
 114struct udf_sb_info {
 115        struct udf_part_map     *s_partmaps;
 116        __u8                    s_volume_ident[32];
 117
 118        /* Overall info */
 119        __u16                   s_partitions;
 120        __u16                   s_partition;
 121
 122        /* Sector headers */
 123        __s32                   s_session;
 124        __u32                   s_anchor;
 125        __u32                   s_last_block;
 126
 127        struct buffer_head      *s_lvid_bh;
 128
 129        /* Default permissions */
 130        umode_t                 s_umask;
 131        kgid_t                  s_gid;
 132        kuid_t                  s_uid;
 133        umode_t                 s_fmode;
 134        umode_t                 s_dmode;
 135        /* Lock protecting consistency of above permission settings */
 136        rwlock_t                s_cred_lock;
 137
 138        /* Root Info */
 139        struct timespec         s_record_time;
 140
 141        /* Fileset Info */
 142        __u16                   s_serial_number;
 143
 144        /* highest UDF revision we have recorded to this media */
 145        __u16                   s_udfrev;
 146
 147        /* Miscellaneous flags */
 148        unsigned long           s_flags;
 149
 150        /* Encoding info */
 151        struct nls_table        *s_nls_map;
 152
 153        /* VAT inode */
 154        struct inode            *s_vat_inode;
 155
 156        struct mutex            s_alloc_mutex;
 157        /* Protected by s_alloc_mutex */
 158        unsigned int            s_lvid_dirty;
 159};
 160
 161static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 162{
 163        return sb->s_fs_info;
 164}
 165
 166struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
 167
 168int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 169
 170static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 171{
 172        return test_bit(flag, &UDF_SB(sb)->s_flags);
 173}
 174
 175static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 176{
 177        set_bit(flag, &UDF_SB(sb)->s_flags);
 178}
 179
 180static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
 181{
 182        clear_bit(flag, &UDF_SB(sb)->s_flags);
 183}
 184
 185#endif /* __LINUX_UDF_SB_H */
 186
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