include/uapi/linux/uio.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /*
   3  *      Berkeley style UIO structures   -       Alan Cox 1994.
   4  *
   5  *              This program is free software; you can redistribute it and/or
   6  *              modify it under the terms of the GNU General Public License
   7  *              as published by the Free Software Foundation; either version
   8  *              2 of the License, or (at your option) any later version.
   9  */
  10 #ifndef _UAPI__LINUX_UIO_H
  11 #define _UAPI__LINUX_UIO_H
  12
  13 #include <linux/compiler.h>
  14 #include <linux/types.h>
  15
  16
  17 struct iovec
  18 {
  19         void __user *iov_base;  /* BSD uses caddr_t (1003.1g requires void *) */
  20         __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
  21 };
  22
  23 /*
  24  *      UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
  25  */
  26
  27 #define UIO_FASTIOV     8
  28 #define UIO_MAXIOV      1024
  29
  30
  31 #endif /* _UAPI__LINUX_UIO_H */