LXR linux/fs/udf/udf

   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
  58struct 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
  75struct udf_sparing_data {
  76        __u16   s_packet_len;
  77        struct buffer_head *s_spar_map[4];
  78};
  79
  80struct udf_virtual_data {
  81        __u32   s_num_entries;
  82        __u16   s_start_offset;
  83};
  84
  85struct udf_bitmap {
  86        __u32                   s_extPosition;
  87        int                     s_nr_groups;
  88        struct buffer_head      *s_block_bitmap[0];
  89};
  90
  91struct 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
 116struct 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
 163static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
 164{
 165        return sb->s_fs_info;
 166}
 167
 168struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
 169
 170int udf_compute_nr_groups(struct super_block *sb, u32 partition);
 171
 172static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
 173{
 174        return test_bit(flag, &UDF_SB(sb)->s_flags);
 175}
 176
 177static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
 178{
 179        set_bit(flag, &UDF_SB(sb)->s_flags);
 180}
 181
 182static 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 */
 188