svn commit: r319823 - stable/11/sys/compat/linux

[Dmitry Chagin]

Author: dchagin
Date: Sun Jun 11 09:33:09 2017
New Revision: 319823
URL: https://svnweb.freebsd.org/changeset/base/319823

Log:
  MFC r319571:
  
  On success, getrandom() Linux system call returns the number of bytes that
  were copied to the buffer supplied by the user.
  
  PR:		219464
  Submitted by:	Maciej Pasternacki
  Reported by:	Maciej Pasternacki
  Approved by:	re (kib)

Modified:
  stable/11/sys/compat/linux/linux_misc.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/compat/linux/linux_misc.c
==============================================================================
--- stable/11/sys/compat/linux/linux_misc.c	Sun Jun 11 04:03:09 2017	(r319822)
+++ stable/11/sys/compat/linux/linux_misc.c	Sun Jun 11 09:33:09 2017	(r319823)
@@ -2516,6 +2516,7 @@ linux_getrandom(struct thread *td, struct linux_getran
 {
 	struct uio uio;
 	struct iovec iov;
+	int error;
 
 	if (args->flags & ~(LINUX_GRND_NONBLOCK|LINUX_GRND_RANDOM))
 		return (EINVAL);
@@ -2532,7 +2533,10 @@ linux_getrandom(struct thread *td, struct linux_getran
 	uio.uio_rw = UIO_READ;
 	uio.uio_td = td;
 
-	return (read_random_uio(&uio, args->flags & LINUX_GRND_NONBLOCK));
+	error = read_random_uio(&uio, args->flags & LINUX_GRND_NONBLOCK);
+	if (error == 0)
+		td->td_retval[0] = args->count - uio.uio_resid;
+	return (error);
 }
 
 int