From owner-svn-src-stable-6@FreeBSD.ORG  Thu Dec 11 18:07:54 2008
Return-Path: <owner-svn-src-stable-6@FreeBSD.ORG>
Delivered-To: svn-src-stable-6@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id D03FE106564A;
	Thu, 11 Dec 2008 18:07:54 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id C17408FC14;
	Thu, 11 Dec 2008 18:07:54 +0000 (UTC) (envelope-from kib@FreeBSD.org)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id mBBI7saQ072008;
	Thu, 11 Dec 2008 18:07:54 GMT (envelope-from kib@svn.freebsd.org)
Received: (from kib@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id mBBI7sSk072007;
	Thu, 11 Dec 2008 18:07:54 GMT (envelope-from kib@svn.freebsd.org)
Message-Id: <200812111807.mBBI7sSk072007@svn.freebsd.org>
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 11 Dec 2008 18:07:54 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-6@freebsd.org
X-SVN-Group: stable-6
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r185939 - in stable/6/sys: . kern
X-BeenThere: svn-src-stable-6@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for only the 6-stable src tree
	<svn-src-stable-6.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-6>, 
	<mailto:svn-src-stable-6-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable-6>
List-Post: <mailto:svn-src-stable-6@freebsd.org>
List-Help: <mailto:svn-src-stable-6-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-6>, 
	<mailto:svn-src-stable-6-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 11 Dec 2008 18:07:55 -0000

Author: kib
Date: Thu Dec 11 18:07:54 2008
New Revision: 185939
URL: http://svn.freebsd.org/changeset/base/185939

Log:
  MFC r185557:
  Prevent creation of the duplicated negative entries.
  
  Requested by:	jhb

Modified:
  stable/6/sys/   (props changed)
  stable/6/sys/kern/vfs_cache.c

Modified: stable/6/sys/kern/vfs_cache.c
==============================================================================
--- stable/6/sys/kern/vfs_cache.c	Thu Dec 11 16:48:35 2008	(r185938)
+++ stable/6/sys/kern/vfs_cache.c	Thu Dec 11 18:07:54 2008	(r185939)
@@ -475,7 +475,7 @@ cache_enter(dvp, vp, cnp)
 	struct vnode *vp;
 	struct componentname *cnp;
 {
-	struct namecache *ncp;
+	struct namecache *ncp, *n2;
 	struct nchashhead *ncpp;
 	u_int32_t hash;
 	int hold;
@@ -531,8 +531,6 @@ cache_enter(dvp, vp, cnp)
 	 * name.
 	 */
 	if (vp) {
-		struct namecache *n2;
-
 		TAILQ_FOREACH(n2, &vp->v_cache_dst, nc_dst) {
 			if (n2->nc_dvp == dvp &&
 			    n2->nc_nlen == cnp->cn_namelen &&
@@ -542,7 +540,16 @@ cache_enter(dvp, vp, cnp)
 				return;
 			}
 		}
-	}	
+	} else {
+		TAILQ_FOREACH(n2, &ncneg, nc_dst) {
+			if (n2->nc_nlen == cnp->cn_namelen &&
+			    !bcmp(n2->nc_name, cnp->cn_nameptr, n2->nc_nlen)) {
+				CACHE_UNLOCK();
+				cache_free(ncp);
+				return;
+			}
+		}
+	}
 
 	numcache++;
 	if (!vp) {