NFS serving off NTFS panic

[Matthew Dillon]

    oops.  Sorry.  That last comment was meant for Kyle's (similar) bug
    report.

    For yours, please try this patch.

    These assertions are all related to tightening up the API requirements
    for VOP_LOOKUP.

					-Matt

Index: ntfs_vnops.c
===================================================================
RCS file: /cvs/src/sys/vfs/ntfs/ntfs_vnops.c,v
retrieving revision 1.19
diff -u -r1.19 ntfs_vnops.c
--- ntfs_vnops.c	12 Nov 2004 00:09:38 -0000	1.19
+++ ntfs_vnops.c	22 Dec 2004 19:52:10 -0000
@@ -717,6 +717,8 @@
 		(int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
 		dip->i_number, lockparent, wantparent));
 
+	*ap->a_vpp = NULL;
+
 	if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
 		dprintf(("ntfs_lookup: faking . directory in %d\n",
 			dip->i_number));
@@ -751,7 +753,8 @@
 		if (lockparent) {
 			error = VN_LOCK(dvp, LK_EXCLUSIVE, cnp->cn_td);
 			if (error) {
-				vput( *(ap->a_vpp) );
+				vput(*ap->a_vpp);
+				*ap->a_vpp = NULL;
 				return (error);
 			}
 			cnp->cn_flags &= ~CNP_PDIRUNLOCK;