uio.h 717 B

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  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. #include <linux/compiler.h>
  12. #include <linux/types.h>
  13. struct iovec
  14. {
  15. void __user *iov_base; /* BSD uses caddr_t (1003.1g requires void *) */
  16. __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
  17. };
  18. /*
  19. * UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
  20. */
  21. #define UIO_FASTIOV 8
  22. #define UIO_MAXIOV 1024
  23. #endif /* _UAPI__LINUX_UIO_H */