LXR linux-old/include/linux/uio.h

   1#ifndef __LINUX_UIO_H
   2#define __LINUX_UIO_H
   3
   4#include <linux/types.h>
   5
   6/*
   7 *      Berkeley style UIO structures   -       Alan Cox 1994.
   8 *
   9 *              This program is free software; you can redistribute it and/or
  10 *              modify it under the terms of the GNU General Public License
  11 *              as published by the Free Software Foundation; either version
  12 *              2 of the License, or (at your option) any later version.
  13 */
  14
  15
  16/* A word of warning: Our uio structure will clash with the C library one (which is now obsolete). Remove the C
  17   library one from sys/uio.h if you have a very old library set */
  18
  19struct iovec
  20{
  21        void *iov_base;         /* BSD uses caddr_t (1003.1g requires void *) */
  22        __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
  23};
  24
  25/*
  26 *      UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
  27 */
  28 
  29#define UIO_FASTIOV     8
  30#define UIO_MAXIOV      1024
  31#if 0
  32#define UIO_MAXIOV      16      /* Maximum iovec's in one operation 
  33                                   16 matches BSD */
  34                                /* Beg pardon: BSD has 1024 --ANK */
  35#endif
  36
  37#endif
  38