Function tcp_fastopen_ccache_bucket_trim

freebsd/netinet/tcp_fastopen.c:1112–1135

}

static void
tcp_fastopen_ccache_bucket_trim(struct tcp_fastopen_ccache_bucket *ccb,
    unsigned int limit)
{
	struct tcp_fastopen_ccache_entry *cce, *cce_tmp;
	unsigned int entries;

	CCB_LOCK(ccb);
	entries = 0;
	TAILQ_FOREACH_SAFE(cce, &ccb->ccb_entries, cce_link, cce_tmp) {
		entries++;
		if (entries > limit)
			tcp_fastopen_ccache_entry_drop(cce, ccb);
	}
	KASSERT(ccb->ccb_num_entries <= (int)limit,
	    ("%s: ccb->ccb_num_entries %d exceeds limit %d", __func__,
		ccb->ccb_num_entries, limit));
	if (limit == 0) {
		KASSERT(TAILQ_EMPTY(&ccb->ccb_entries),
		    ("%s: ccb->ccb_entries not empty", __func__));
		ccb->ccb_num_entries = -1; /* disable bucket */
	}
	CCB_UNLOCK(ccb);
}

static void
tcp_fastopen_ccache_entry_drop(struct tcp_fastopen_ccache_entry *cce,