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 #include <linux/magic.h>
   7
   8 #define UDF_MAX_READ_VERSION            0x0250
   9 #define UDF_MAX_WRITE_VERSION           0x0201
  10
  11 #define UDF_FLAG_USE_EXTENDED_FE        0
  12 #define UDF_VERS_USE_EXTENDED_FE        0x0200
  13 #define UDF_FLAG_USE_STREAMS            1
  14 #define UDF_VERS_USE_STREAMS            0x0200
  15 #define UDF_FLAG_USE_SHORT_AD           2
  16 #define UDF_FLAG_USE_AD_IN_ICB          3
  17 #define UDF_FLAG_USE_FILE_CTIME_EA      4
  18 #define UDF_FLAG_STRICT                 5
  19 #define UDF_FLAG_UNDELETE               6
  20 #define UDF_FLAG_UNHIDE                 7
  21 #define UDF_FLAG_VARCONV                8
  22 #define UDF_FLAG_NLS_MAP                9
  23 #define UDF_FLAG_UTF8                   10
  24 #define UDF_FLAG_UID_FORGET     11    /* save -1 for uid to disk */
  25 #define UDF_FLAG_UID_IGNORE     12    /* use sb uid instead of on disk uid */
  26 #define UDF_FLAG_GID_FORGET     13
  27 #define UDF_FLAG_GID_IGNORE     14
  28 #define UDF_FLAG_UID_SET        15
  29 #define UDF_FLAG_GID_SET        16
  30 #define UDF_FLAG_SESSION_SET    17
  31 #define UDF_FLAG_LASTBLOCK_SET  18
  32 #define UDF_FLAG_BLOCKSIZE_SET  19
  33
  34 #define UDF_PART_FLAG_UNALLOC_BITMAP    0x0001
  35 #define UDF_PART_FLAG_UNALLOC_TABLE     0x0002
  36 #define UDF_PART_FLAG_FREED_BITMAP      0x0004
  37 #define UDF_PART_FLAG_FREED_TABLE       0x0008
  38 #define UDF_PART_FLAG_READ_ONLY         0x0010
  39 #define UDF_PART_FLAG_WRITE_ONCE        0x0020
  40 #define UDF_PART_FLAG_REWRITABLE        0x0040
  41 #define UDF_PART_FLAG_OVERWRITABLE      0x0080
  42
  43 #define UDF_MAX_BLOCK_LOADED    8
  44
  45 #define UDF_TYPE1_MAP15                 0x1511U
  46 #define UDF_VIRTUAL_MAP15               0x1512U
  47 #define UDF_VIRTUAL_MAP20               0x2012U
  48 #define UDF_SPARABLE_MAP15              0x1522U
  49 #define UDF_METADATA_MAP25              0x2511U
  50
  51 #define UDF_INVALID_MODE                ((umode_t)-1)
  52
  53 #pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */
  54
  55 #define MF_DUPLICATE_MD         0x01
  56 #define MF_MIRROR_FE_LOADED     0x02
  57
  58 struct udf_meta_data {
  59         __u32   s_meta_file_loc;
  60         __u32   s_mirror_file_loc;
  61         __u32   s_bitmap_file_loc;
  62         __u32   s_alloc_unit_size;
  63         __u16   s_align_unit_size;
  64         /*
  65          * Partition Reference Number of the associated physical / sparable
  66          * partition
  67          */
  68         __u16   s_phys_partition_ref;
  69         int     s_flags;
  70         struct inode *s_metadata_fe;
  71         struct inode *s_mirror_fe;
  72         struct inode *s_bitmap_fe;
  73 };
  74
  75 struct udf_sparing_data {
  76         __u16   s_packet_len;
  77         struct buffer_head *s_spar_map[4];
  78 };
  79
  80 struct udf_virtual_data {
  81         __u32   s_num_entries;
  82         __u16   s_start_offset;
  83 };
  84
  85 struct udf_bitmap {
  86         __u32                   s_extPosition;
  87         int                     s_nr_groups;
  88         struct buffer_head      *s_block_bitmap[0];
  89 };
  90
  91 struct udf_part_map {
  92         union {
  93                 struct udf_bitmap       *s_bitmap;
  94                 struct inode            *s_table;
  95         } s_uspace;
  96         union {
  97                 struct udf_bitmap       *s_bitmap;
  98                 struct inode            *s_table;
  99         } s_fspace;
 100         __u32   s_partition_root;
 101         __u32   s_partition_len;
 102         __u16   s_partition_type;
 103         __u16   s_partition_num;
 104         union {
 105                 struct udf_sparing_data s_sparing;
 106                 struct udf_virtual_data s_virtual;
 107                 struct udf_meta_data s_metadata;
 108         } s_type_specific;
 109         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 110         __u16   s_volumeseqnum;
 111         __u16   s_partition_flags;
 112 };
 113
 114 #pragma pack()
 115
 116 struct udf_sb_info {
 117         struct udf_part_map     *s_partmaps;
 118         __u8                    s_volume_ident[32];
 119
 120         /* Overall info */
 121         __u16                   s_partitions;
 122         __u16                   s_partition;
 123
 124         /* Sector headers */
 125         __s32                   s_session;
 126         __u32                   s_anchor;
 127         __u32                   s_last_block;
 128
 129         struct buffer_head      *s_lvid_bh;
 130
 131         /* Default permissions */
 132         umode_t                 s_umask;
 133         kgid_t                  s_gid;
 134         kuid_t                  s_uid;
 135         umode_t                 s_fmode;
 136         umode_t                 s_dmode;
 137         /* Lock protecting consistency of above permission settings */
 138         rwlock_t                s_cred_lock;
 139
 140         /* Root Info */
 141         struct timespec         s_record_time;
 142
 143         /* Fileset Info */
 144         __u16                   s_serial_number;
 145
 146         /* highest UDF revision we have recorded to this media */
 147         __u16                   s_udfrev;
 148
 149         /* Miscellaneous flags */
 150         unsigned long           s_flags;
 151
 152         /* Encoding info */
 153         struct nls_table        *s_nls_map;
 154
 155         /* VAT inode */
 156         struct inode            *s_vat_inode;
 157
 158         struct mutex            s_alloc_mutex;
 159         /* Protected by s_alloc_mutex */
 160         unsigned int            s_lvid_dirty;
 161 };
 162
 163 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 164 {
 165         return sb->s_fs_info;
 166 }
 167
 168 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
 169
 170 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 171
 172 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 173 {
 174         return test_bit(flag, &UDF_SB(sb)->s_flags);
 175 }
 176
 177 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 178 {
 179         set_bit(flag, &UDF_SB(sb)->s_flags);
 180 }
 181
 182 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
 183 {
 184         clear_bit(flag, &UDF_SB(sb)->s_flags);
 185 }
 186
 187 #endif /* __LINUX_UDF_SB_H */