Function if_inc_counter

freebsd/net/if.c:1774–1781

* Increase an ifnet counter. Usually used for counters shared * between the stack and a driver, but function supports them all. */

 * between the stack and a driver, but function supports them all.
 */
void
if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
{

	KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));

	counter_u64_add(ifp->if_counters[cnt], inc);
}

/*
 * Copy data from ifnet to userland API structure if_data.