Function bbr_fini

freebsd/netinet/tcp_stacks/bbr.c:10303–10349

}

static void
bbr_fini(struct tcpcb *tp, int32_t tcb_is_purged)
{
	if (tp->t_fb_ptr) {
		uint32_t calc;
		struct tcp_bbr *bbr;
		struct bbr_sendmap *rsm;

		bbr = (struct tcp_bbr *)tp->t_fb_ptr;
		if (bbr->r_ctl.crte)
			tcp_rel_pacing_rate(bbr->r_ctl.crte, bbr->rc_tp);
		bbr_log_flowend(bbr);
		bbr->rc_tp = NULL;
		if (tp->t_inpcb) {
			/* Backout any flags2 we applied */
			tp->t_inpcb->inp_flags2 &= ~INP_CANNOT_DO_ECN;
			tp->t_inpcb->inp_flags2 &= ~INP_SUPPORTS_MBUFQ;
			tp->t_inpcb->inp_flags2 &= ~INP_MBUF_QUEUE_READY;
		}
		if (bbr->bbr_hdrw_pacing)
			counter_u64_add(bbr_flows_whdwr_pacing, -1);
		else
			counter_u64_add(bbr_flows_nohdwr_pacing, -1);
		rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map);
		while (rsm) {
			TAILQ_REMOVE(&bbr->r_ctl.rc_map, rsm, r_next);
			uma_zfree(bbr_zone, rsm);
			rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map);
		}
		rsm = TAILQ_FIRST(&bbr->r_ctl.rc_free);
		while (rsm) {
			TAILQ_REMOVE(&bbr->r_ctl.rc_free, rsm, r_next);
			uma_zfree(bbr_zone, rsm);
			rsm = TAILQ_FIRST(&bbr->r_ctl.rc_free);
		}
		calc = bbr->r_ctl.rc_high_rwnd - bbr->r_ctl.rc_init_rwnd;
		if (calc > (bbr->r_ctl.rc_init_rwnd / 10))
			BBR_STAT_INC(bbr_dynamic_rwnd);
		else
			BBR_STAT_INC(bbr_static_rwnd);
		bbr->r_ctl.rc_free_cnt = 0;
		uma_zfree(bbr_pcb_zone, tp->t_fb_ptr);
		tp->t_fb_ptr = NULL;
	}
	/* Make sure snd_nxt is correctly set */
	tp->snd_nxt = tp->snd_max;
}

static void
bbr_set_state(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t win)