example/fioc.h

   1 /*
   2   FUSE-ioctl: ioctl support for FUSE
   3   Copyright (C) 2008       SUSE Linux Products GmbH
   4   Copyright (C) 2008       Tejun Heo <teheo@suse.de>
   5
   6   This program can be distributed under the terms of the GNU GPL.
   7   See the file COPYING.
   8 */
   9
  10 #include <sys/types.h>
  11 #include <sys/uio.h>
  12 #include <sys/ioctl.h>
  13
  14 enum {
  15         FIOC_GET_SIZE   = _IOR('E', 0, size_t),
  16         FIOC_SET_SIZE   = _IOW('E', 1, size_t),
  17
  18         /*
  19          * The following two ioctls don't follow usual encoding rules
  20          * and transfer variable amount of data.
  21          */
  22         FIOC_READ       = _IO('E', 2),
  23         FIOC_WRITE      = _IO('E', 3),
  24 };
  25
  26 struct fioc_rw_arg {
  27         off_t           offset;
  28         void            *buf;
  29         size_t          size;
  30         size_t          prev_size;      /* out param for previous total size */
  31         size_t          new_size;       /* out param for new total size */
  32 };