fs/ntfs/macros.h

   1 /*
   2  *  macros.h
   3  *
   4  *  Copyright (C) 1995 Martin von Löwis
   5  *  Copyright (C) 1996 Régis Duchesne
   6  */
   7
   8 #define NTFS_FD(vol)            ((vol)->u.fd)
   9
  10 /* Linux */
  11 #ifdef NTFS_IN_LINUX_KERNEL
  12 #define NTFS_SB(vol)            ((struct super_block*)(vol)->sb)
  13 #define NTFS_SB2VOL(sb)         (&(sb)->u.ntfs_sb)
  14 #define NTFS_INO2VOL(ino)       (&((ino)->i_sb->u.ntfs_sb))
  15 #define NTFS_LINO2NINO(ino)     (&((ino)->u.ntfs_i))
  16 #else
  17 #define NTFS_SB(vol)            ((struct super_block*)(vol)->u.sb)
  18 #define NTFS_SB2VOL(sb)         ((ntfs_volume*)(sb)->u.generic_sbp)
  19 #define NTFS_INO2VOL(ino)       ((ntfs_volume*)((ino)->i_sb->u.generic_sbp))
  20 #define NTFS_LINO2NINO(ino)     ((ntfs_inode*)((ino)->u.generic_ip))
  21 #endif
  22
  23 /* BSD */
  24 #define NTFS_MNT(vol)           ((struct mount*)(vol)->u.sb)
  25 #define NTFS_MNT2VOL(sb)        ((ntfs_volume*)(sb)->mnt_data)
  26 #define NTFS_V2INO(ino)         ((ntfs_inode*)((ino)->v_data))
  27
  28 /* Classical min and max macros still missing in standard headers... */
  29 #ifndef min
  30 #define min(a,b)        ((a) <= (b) ? (a) : (b))
  31 #define max(a,b)        ((a) >= (b) ? (a) : (b))
  32 #endif
  33
  34 #define IS_MAGIC(a,b)           (*(int*)(a)==*(int*)(b))
  35 #define IS_MFT_RECORD(a)        IS_MAGIC((a),"FILE")
  36 #define IS_NTFS_VOLUME(a)       IS_MAGIC((a)+3,"NTFS")
  37 #define IS_INDEX_RECORD(a)      IS_MAGIC((a),"INDX")
  38
  39 /* 'NTFS' in little endian */
  40 #define NTFS_SUPER_MAGIC        0x5346544E
  41
  42 #define NTFS_AFLAG_RO           1
  43 #define NTFS_AFLAG_HIDDEN       2
  44 #define NTFS_AFLAG_SYSTEM       4
  45 #define NTFS_AFLAG_ARCHIVE      20
  46 #define NTFS_AFLAG_COMPRESSED   0x800
  47 #define NTFS_AFLAG_DIR          0x10000000
  48
  49 /*
  50  * Local variables:
  51  *  c-file-style: "linux"
  52  * End:
  53  */