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
  16 struct 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 */