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                ((mode_t)-1)
  54
  55 #pragma pack(1) /* XXX(hch): Why?  This file just defines in-core structures */
  56
  57 struct udf_meta_data {
  58         __u32   s_meta_file_loc;
  59         __u32   s_mirror_file_loc;
  60         __u32   s_bitmap_file_loc;
  61         __u32   s_alloc_unit_size;
  62         __u16   s_align_unit_size;
  63         __u8    s_dup_md_flag;
  64         struct inode *s_metadata_fe;
  65         struct inode *s_mirror_fe;
  66         struct inode *s_bitmap_fe;
  67 };
  68
  69 struct udf_sparing_data {
  70         __u16   s_packet_len;
  71         struct buffer_head *s_spar_map[4];
  72 };
  73
  74 struct udf_virtual_data {
  75         __u32   s_num_entries;
  76         __u16   s_start_offset;
  77 };
  78
  79 struct udf_bitmap {
  80         __u32                   s_extLength;
  81         __u32                   s_extPosition;
  82         __u16                   s_nr_groups;
  83         struct buffer_head      **s_block_bitmap;
  84 };
  85
  86 struct udf_part_map {
  87         union {
  88                 struct udf_bitmap       *s_bitmap;
  89                 struct inode            *s_table;
  90         } s_uspace;
  91         union {
  92                 struct udf_bitmap       *s_bitmap;
  93                 struct inode            *s_table;
  94         } s_fspace;
  95         __u32   s_partition_root;
  96         __u32   s_partition_len;
  97         __u16   s_partition_type;
  98         __u16   s_partition_num;
  99         union {
 100                 struct udf_sparing_data s_sparing;
 101                 struct udf_virtual_data s_virtual;
 102                 struct udf_meta_data s_metadata;
 103         } s_type_specific;
 104         __u32   (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
 105         __u16   s_volumeseqnum;
 106         __u16   s_partition_flags;
 107 };
 108
 109 #pragma pack()
 110
 111 struct udf_sb_info {
 112         struct udf_part_map     *s_partmaps;
 113         __u8                    s_volume_ident[32];
 114
 115         /* Overall info */
 116         __u16                   s_partitions;
 117         __u16                   s_partition;
 118
 119         /* Sector headers */
 120         __s32                   s_session;
 121         __u32                   s_anchor;
 122         __u32                   s_last_block;
 123
 124         struct buffer_head      *s_lvid_bh;
 125
 126         /* Default permissions */
 127         mode_t                  s_umask;
 128         gid_t                   s_gid;
 129         uid_t                   s_uid;
 130         mode_t                  s_fmode;
 131         mode_t                  s_dmode;
 132         /* Lock protecting consistency of above permission settings */
 133         rwlock_t                s_cred_lock;
 134
 135         /* Root Info */
 136         struct timespec         s_record_time;
 137
 138         /* Fileset Info */
 139         __u16                   s_serial_number;
 140
 141         /* highest UDF revision we have recorded to this media */
 142         __u16                   s_udfrev;
 143
 144         /* Miscellaneous flags */
 145         unsigned long           s_flags;
 146
 147         /* Encoding info */
 148         struct nls_table        *s_nls_map;
 149
 150         /* VAT inode */
 151         struct inode            *s_vat_inode;
 152
 153         struct mutex            s_alloc_mutex;
 154         /* Protected by s_alloc_mutex */
 155         unsigned int            s_lvid_dirty;
 156 };
 157
 158 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 159 {
 160         return sb->s_fs_info;
 161 }
 162
 163 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
 164
 165 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 166
 167 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 168 {
 169         return test_bit(flag, &UDF_SB(sb)->s_flags);
 170 }
 171
 172 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 173 {
 174         set_bit(flag, &UDF_SB(sb)->s_flags);
 175 }
 176
 177 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
 178 {
 179         clear_bit(flag, &UDF_SB(sb)->s_flags);
 180 }
 181
 182 #endif /* __LINUX_UDF_SB_H */