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) {
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