From a194c9f7090b59b6fd137d25fe5d6a5bf3461042 Mon Sep 17 00:00:00 2001
From: Will Andrews <will@FreeBSD.org>
Date: Thu, 26 May 2011 16:27:00 +0000
Subject: [PATCH] Close a race between libzfs and mountd when updating NFS
 exports. - Flush the file descriptor for the new ZFS exports file before  
 sending a SIGHUP to mountd.

Reviewed by:	pjd
Approved by:	ken
MFC after:	3 days
---
 cddl/compat/opensolaris/misc/fsshare.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cddl/compat/opensolaris/misc/fsshare.c b/cddl/compat/opensolaris/misc/fsshare.c
index e8faa928d6fb..c3247f91fec4 100644
--- a/cddl/compat/opensolaris/misc/fsshare.c
+++ b/cddl/compat/opensolaris/misc/fsshare.c
@@ -223,6 +223,7 @@ fsshare_main(const char *file, const char *mountpoint, const char *shareopts,
 			error = errno;
 			unlink(tmpfile);
 		} else {
+			fflush(newfd);
 			/*
 			 * Send SIGHUP to mountd, but unlock exports file later.
 			 */