Author: kan
Date: Wed Apr 15 16:36:13 2009
New Revision: 191107
URL: http://svn.freebsd.org/changeset/base/191107
Log:
MFC r191081-191082:
Properly handle negative cache enries found through dotdot lookups.
Submitted by: tegge
Approved by: re(kib)
_M sys
M sys/kern/vfs_cache.c
_M sys/dev/cxgb
_M sys/dev/ath/ath_hal
_M sys/contrib/pf
Modified:
releng/7.2/sys/ (props changed)
releng/7.2/sys/contrib/pf/ (props changed)
releng/7.2/sys/dev/ath/ath_hal/ (props changed)
releng/7.2/sys/dev/cxgb/ (props changed)
releng/7.2/sys/kern/vfs_cache.c
Modified: releng/7.2/sys/kern/vfs_cache.c
==============================================================================
--- releng/7.2/sys/kern/vfs_cache.c Wed Apr 15 16:05:25 2009
(r191106)
+++ releng/7.2/sys/kern/vfs_cache.c Wed Apr 15 16:36:13 2009
(r191107)
@@ -370,6 +370,11 @@ retry:
*vpp = dvp->v_cache_dd->nc_vp;
else
*vpp = dvp->v_cache_dd->nc_dvp;
+ /* Return failure if negative entry was found. */
+ if (*vpp == NULL) {
+ ncp = dvp->v_cache_dd;
+ goto negative_success;
+ }
CTR3(KTR_VFS, "cache_lookup(%p, %s) found %p via ..",
dvp, cnp->cn_nameptr, *vpp);
goto success;
@@ -416,6 +421,7 @@ retry:
goto success;
}
+negative_success:
/* We found a negative match, and want to create it, so purge */
if (cnp->cn_nameiop == CREATE) {
numnegzaps++;
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