static ofp_port_t
execute_hrw(const struct ofpact_bundle *bundle,
const struct flow *flow, struct flow_wildcards *wc,
bool (*slave_enabled)(ofp_port_t ofp_port, void *aux), void *aux)
{
uint32_t flow_hash, best_hash;
int best, i;
if (bundle->n_slaves > 1) {
flow_mask_hash_fields(flow, wc, bundle->fields);
}
flow_hash = flow_hash_fields(flow, bundle->fields, bundle->basis);
best = -1;
best_hash = 0;
for (i = 0; i < bundle->n_slaves; i++) {
if (slave_enabled(bundle->slaves[i], aux)) {
uint32_t hash = hash_2words(i, flow_hash);
if (best < 0 || hash > best_hash) {
best_hash = hash;
best = i;
}
}
}
return best >= 0 ? bundle->slaves[best] : OFPP_NONE;
}
/* Executes 'mp' based on the current contents of 'flow', writing the results
* back into 'flow'. Sets fields in 'wc' that were used to calculate
* the result. */
void
multipath_execute(const struct ofpact_multipath *mp, struct flow *flow,
struct flow_wildcards *wc)
{
/* Calculate value to store. */
uint32_t hash = flow_hash_fields(flow, mp->fields, mp->basis);
uint16_t link = multipath_algorithm(hash, mp->algorithm,
mp->max_link + 1, mp->arg);
flow_mask_hash_fields(flow, wc, mp->fields);
nxm_reg_load(&mp->dst, link, flow, wc);
}