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fioc.h

/*
  FUSE-ioctl: ioctl support for FUSE
  Copyright (C) 2008       SUSE Linux Products GmbH
  Copyright (C) 2008       Tejun Heo <teheo@suse.de>

  This program can be distributed under the terms of the GNU GPL.
  See the file COPYING.
*/

#include <sys/types.h>
#include <sys/uio.h>
#include <sys/ioctl.h>

enum {
      FIOC_GET_SIZE     = _IOR('E', 0, size_t),
      FIOC_SET_SIZE     = _IOW('E', 1, size_t),

      /*
       * The following two ioctls don't follow usual encoding rules
       * and transfer variable amount of data.
       */
      FIOC_READ   = _IO('E', 2),
      FIOC_WRITE  = _IO('E', 3),
};

struct fioc_rw_arg {
      off_t       offset;
      void        *buf;
      size_t            size;
      size_t            prev_size;  /* out param for previous total size */
      size_t            new_size;   /* out param for new total size */
};

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