From owner-svn-src-all@FreeBSD.ORG  Mon Sep  7 18:54:55 2009
Return-Path: <owner-svn-src-all@FreeBSD.ORG>
Delivered-To: svn-src-all@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9537E106568D;
	Mon,  7 Sep 2009 18:54:55 +0000 (UTC) (envelope-from pjd@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 83EB48FC0C;
	Mon,  7 Sep 2009 18:54:55 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n87IstO1023619;
	Mon, 7 Sep 2009 18:54:55 GMT (envelope-from pjd@svn.freebsd.org)
Received: (from pjd@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id n87IstZ7023617;
	Mon, 7 Sep 2009 18:54:55 GMT (envelope-from pjd@svn.freebsd.org)
Message-Id: <200909071854.n87IstZ7023617@svn.freebsd.org>
From: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Date: Mon, 7 Sep 2009 18:54:55 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r196944 -
	head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
	user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-all>,
	<mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 07 Sep 2009 18:54:55 -0000

Author: pjd
Date: Mon Sep  7 18:54:55 2009
New Revision: 196944
URL: http://svn.freebsd.org/changeset/base/196944

Log:
  Don't recheck ownership on update mount. This will eliminate LOR between
  vfs_busy() and mount mutex. We check ownership in vfs_domount() anyway.
  
  Noticed by:	kib
  Reviewed by:	kib
  MFC after:	1 week

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c	Mon Sep  7 18:23:26 2009	(r196943)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c	Mon Sep  7 18:54:55 2009	(r196944)
@@ -719,7 +719,10 @@ zfs_mount(vfs_t *vfsp)
 	error = secpolicy_fs_mount(cr, mvp, vfsp);
 	if (error) {
 		error = dsl_deleg_access(osname, ZFS_DELEG_PERM_MOUNT, cr);
-		if (error == 0) {
+		if (error != 0)
+			goto out;
+
+		if (!(vfsp->vfs_flag & MS_REMOUNT)) {
 			vattr_t		vattr;
 
 			/*
@@ -753,11 +756,9 @@ zfs_mount(vfs_t *vfsp)
 			}
 			VOP_UNLOCK(mvp, 0);
 #endif
-
-			secpolicy_fs_mount_clearopts(cr, vfsp);
-		} else {
-			goto out;
 		}
+
+		secpolicy_fs_mount_clearopts(cr, vfsp);
 	}
 
 	/*