LXR linux/include/uapi/linux/uio.h

   1/*
   2 *      Berkeley style UIO structures   -       Alan Cox 1994.
   3 *
   4 *              This program is free software; you can redistribute it and/or
   5 *              modify it under the terms of the GNU General Public License
   6 *              as published by the Free Software Foundation; either version
   7 *              2 of the License, or (at your option) any later version.
   8 */
   9#ifndef _UAPI__LINUX_UIO_H
  10#define _UAPI__LINUX_UIO_H
  11
  12#include <linux/compiler.h>
  13#include <linux/types.h>
  14
  15
  16struct iovec
  17{
  18        void __user *iov_base;  /* BSD uses caddr_t (1003.1g requires void *) */
  19        __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
  20};
  21
  22/*
  23 *      UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
  24 */
  25 
  26#define UIO_FASTIOV     8
  27#define UIO_MAXIOV      1024
  28
  29
  30#endif /* _UAPI__LINUX_UIO_H */
  31