ND_READ
nfs_vpcred(vp, ND_READ));
nfs_vpcred(vp, ND_READ), &error));
nfs_vpcred(vp, ND_READ), &error));
nfs_vpcred(vp, ND_READ), &error));
nfs_vpcred(vp, ND_READ), &error));
if (np && (ndflag & ND_READ) && np->n_rucred)