ND_WRITE
nfs_vpcred(vp, ND_WRITE));
nfs_vpcred(vp, ND_WRITE));
nfs_vpcred(vp, ND_WRITE), &error));
nfs_vpcred(vp, ND_WRITE), &error));
(void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
if (np && (ndflag & ND_WRITE) && np->n_wucred)