fs/udf/udf_sb.h

   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
  60 struct 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
  72 struct udf_sparing_data {
  73         __u16   s_packet_len;
  74         struct buffer_head *s_spar_map[4];
  75 };
  76
  77 struct udf_virtual_data {
  78         __u32   s_num_entries;
  79         __u16   s_start_offset;
  80 };
  81
  82 struct udf_bitmap {
  83         __u32                   s_extPosition;
  84         int                     s_nr_groups;
  85         struct buffer_head      *s_block_bitmap[0];
  86 };
  87
  88 struct 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
 113 struct 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
 160 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 161 {
 162         return sb->s_fs_info;
 163 }
 164
 165 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
 166
 167 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 168
 169 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 170 {
 171         return test_bit(flag, &UDF_SB(sb)->s_flags);
 172 }
 173
 174 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 175 {
 176         set_bit(flag, &UDF_SB(sb)->s_flags);
 177 }
 178
 179 static 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 */