TOPO_NODE_BOUND
if (TOPO_NODE_BOUND & tn.tn_state) {
tn->tn_state = TOPO_NODE_ROOT | TOPO_NODE_BOUND;
assert((pnode->tn_state & TOPO_NODE_BOUND) ||
node->tn_state |= TOPO_NODE_BOUND;
node->tn_state |= TOPO_NODE_BOUND;
if (!(node->tn_state & TOPO_NODE_BOUND)) {
node->tn_state &= ~TOPO_NODE_BOUND;