fs/reiser4/ioctl.h

   1 /* Copyright 2001, 2002, 2003 by Hans Reiser, licensing governed by
   2  * reiser4/README */
   3
   4 #if !defined( __REISER4_IOCTL_H__ )
   5 #define __REISER4_IOCTL_H__
   6
   7 #include <linux/fs.h>
   8
   9 /*
  10  * ioctl(2) command used to "unpack" reiser4 file, that is, convert it into
  11  * extents and fix in this state. This is used by applications that rely on
  12  *
  13  *     . files being block aligned, and
  14  *
  15  *     . files never migrating on disk
  16  *
  17  * for example, boot loaders (LILO) need this.
  18  *
  19  * This ioctl should be used as
  20  *
  21  *     result = ioctl(fd, REISER4_IOC_UNPACK);
  22  *
  23  * File behind fd descriptor will be converted to the extents (if necessary),
  24  * and its stat-data will be updated so that it will never be converted back
  25  * into tails again.
  26  */
  27 #define REISER4_IOC_UNPACK _IOW(0xCD,1,long)
  28
  29 /* __REISER4_IOCTL_H__ */
  30 #endif
  31
  32 /* Make Linus happy.
  33    Local variables:
  34    c-indentation-style: "K&R"
  35    mode-name: "LC"
  36    c-basic-offset: 8
  37    tab-width: 8
  38    fill-column: 120
  39    scroll-step: 1
  40    End:
  41 */