Author: kib
Date: Mon Aug 4 01:10:47 2014
New Revision: 269493
URL: http://svnweb.freebsd.org/changeset/base/269493
Log:
MFC r269187:
Assert that nullfs vnode has VV_ROOT set whenever lower vnode has.
Assert that dotdot lookup on the root vnode is not performed.
Modified:
stable/10/sys/fs/nullfs/null_vnops.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/fs/nullfs/null_vnops.c
==============================================================================
--- stable/10/sys/fs/nullfs/null_vnops.c Mon Aug 4 00:58:12 2014
(r269492)
+++ stable/10/sys/fs/nullfs/null_vnops.c Mon Aug 4 01:10:47 2014
(r269493)
@@ -372,6 +372,10 @@ null_lookup(struct vop_lookup_args *ap)
*/
ldvp = NULLVPTOLOWERVP(dvp);
vp = lvp = NULL;
+ KASSERT((ldvp->v_vflag & VV_ROOT) == 0 ||
+ ((dvp->v_vflag & VV_ROOT) != 0 && (flags & ISDOTDOT) == 0),
+ ("ldvp %p fl %#x dvp %p fl %#x flags %#x", ldvp, ldvp->v_vflag,
+ dvp, dvp->v_vflag, flags));
error = VOP_LOOKUP(ldvp, &lvp, cnp);
if (error == EJUSTRETURN && (flags & ISLASTCN) &&
(dvp->v_mount->mnt_flag & MNT_RDONLY) &&
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