Author: mjg
Date: Wed Aug 19 15:08:14 2020
New Revision: 364395
URL: https://svnweb.freebsd.org/changeset/base/364395
Log:
cache: when adding an already existing entry assert on a complete match
Modified:
head/sys/kern/vfs_cache.c
Modified: head/sys/kern/vfs_cache.c
==============================================================================
--- head/sys/kern/vfs_cache.c Wed Aug 19 15:07:28 2020 (r364394)
+++ head/sys/kern/vfs_cache.c Wed Aug 19 15:08:14 2020 (r364395)
@@ -1957,6 +1957,15 @@ cache_enter_time(struct vnode *dvp, struct vnode *vp,
if (n2->nc_dvp == dvp &&
n2->nc_nlen == cnp->cn_namelen &&
!bcmp(n2->nc_name, cnp->cn_nameptr, n2->nc_nlen)) {
+ MPASS(cache_ncp_canuse(n2));
+ if ((n2->nc_flag & NCF_NEGATIVE) != 0)
+ KASSERT(vp == NULL,
+ ("%s: found entry pointing to a different
vnode (%p != %p)",
+ __func__, NULL, vp));
+ else
+ KASSERT(n2->nc_vp == vp,
+ ("%s: found entry pointing to a different
vnode (%p != %p)",
+ __func__, n2->nc_vp, vp));
if (tsp != NULL) {
KASSERT((n2->nc_flag & NCF_TS) != 0,
("no NCF_TS"));
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