68 static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
1056 static void tcp_set_skb_tso_segs(struct sk_buff *skb, unsigned int mss_now)  in tcp_set_skb_tso_segs()  argument
1058 	if (skb->len <= mss_now || skb->ip_summed == CHECKSUM_NONE) {  in tcp_set_skb_tso_segs()
1065 		tcp_skb_pcount_set(skb, DIV_ROUND_UP(skb->len, mss_now));  in tcp_set_skb_tso_segs()
1066 		TCP_SKB_CB(skb)->tcp_gso_size = mss_now;  in tcp_set_skb_tso_segs()
1136 		 unsigned int mss_now, gfp_t gfp)  in tcp_fragment()  argument
1198 	tcp_set_skb_tso_segs(skb, mss_now);  in tcp_fragment()
1199 	tcp_set_skb_tso_segs(buff, mss_now);  in tcp_fragment()
1289 	int mss_now;  in __tcp_mtu_to_mss()  local
1294 	mss_now = pmtu - icsk->icsk_af_ops->net_header_len - sizeof(struct tcphdr);  in __tcp_mtu_to_mss()
1301 			mss_now -= icsk->icsk_af_ops->net_frag_header_len;  in __tcp_mtu_to_mss()
1305 	if (mss_now > tp->rx_opt.mss_clamp)  in __tcp_mtu_to_mss()
1306 		mss_now = tp->rx_opt.mss_clamp;  in __tcp_mtu_to_mss()
1309 	mss_now -= icsk->icsk_ext_hdr_len;  in __tcp_mtu_to_mss()
1312 	if (mss_now < 48)  in __tcp_mtu_to_mss()
1313 		mss_now = 48;  in __tcp_mtu_to_mss()
1314 	return mss_now;  in __tcp_mtu_to_mss()
1390 	int mss_now;  in tcp_sync_mss()  local
1395 	mss_now = tcp_mtu_to_mss(sk, pmtu);  in tcp_sync_mss()
1396 	mss_now = tcp_bound_to_half_wnd(tp, mss_now);  in tcp_sync_mss()
1401 		mss_now = min(mss_now, tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low));  in tcp_sync_mss()
1402 	tp->mss_cache = mss_now;  in tcp_sync_mss()
1404 	return mss_now;  in tcp_sync_mss()
1415 	u32 mss_now;  in tcp_current_mss()  local
1420 	mss_now = tp->mss_cache;  in tcp_current_mss()
1425 			mss_now = tcp_sync_mss(sk, mtu);  in tcp_current_mss()
1436 		mss_now -= delta;  in tcp_current_mss()
1439 	return mss_now;  in tcp_current_mss()
1508 static void tcp_minshall_update(struct tcp_sock *tp, unsigned int mss_now,  in tcp_minshall_update()  argument
1511 	if (skb->len < tcp_skb_pcount(skb) * mss_now)  in tcp_minshall_update()
1533 static u32 tcp_tso_autosize(const struct sock *sk, unsigned int mss_now)  in tcp_tso_autosize()  argument
1545 	segs = max_t(u32, bytes / mss_now, sysctl_tcp_min_tso_segs);  in tcp_tso_autosize()
1553 					unsigned int mss_now,  in tcp_mss_split_point()  argument
1561 	max_len = mss_now * max_segs;  in tcp_mss_split_point()
1571 	partial = needed % mss_now;  in tcp_mss_split_point()
1611 static int tcp_init_tso_segs(struct sk_buff *skb, unsigned int mss_now)  in tcp_init_tso_segs()  argument
1615 	if (!tso_segs || (tso_segs > 1 && tcp_skb_mss(skb) != mss_now)) {  in tcp_init_tso_segs()
1616 		tcp_set_skb_tso_segs(skb, mss_now);  in tcp_init_tso_segs()
1703 			unsigned int mss_now, gfp_t gfp)  in tso_fragment()  argument
1711 		return tcp_fragment(sk, skb, len, mss_now, gfp);  in tso_fragment()
1740 	tcp_set_skb_tso_segs(skb, mss_now);  in tso_fragment()
1741 	tcp_set_skb_tso_segs(buff, mss_now);  in tso_fragment()
1878 	int mss_now;  in tcp_mtu_probe()  local
1896 	mss_now = tcp_current_mss(sk);  in tcp_mtu_probe()
1975 				tcp_set_skb_tso_segs(skb, mss_now);  in tcp_mtu_probe()
2020 static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,  in tcp_write_xmit()  argument
2043 	max_segs = tcp_tso_autosize(sk, mss_now);  in tcp_write_xmit()
2047 		tso_segs = tcp_init_tso_segs(skb, mss_now);  in tcp_write_xmit()
2065 		if (unlikely(!tcp_snd_wnd_test(tp, skb, mss_now)))  in tcp_write_xmit()
2069 			if (unlikely(!tcp_nagle_test(tp, skb, mss_now,  in tcp_write_xmit()
2080 		limit = mss_now;  in tcp_write_xmit()
2082 			limit = tcp_mss_split_point(sk, skb, mss_now,  in tcp_write_xmit()
2089 		    unlikely(tso_fragment(sk, skb, limit, mss_now, gfp)))  in tcp_write_xmit()
2125 		tcp_minshall_update(tp, mss_now, skb);  in tcp_write_xmit()
2306 void tcp_push_one(struct sock *sk, unsigned int mss_now)  in tcp_push_one()  argument
2310 	BUG_ON(!skb || skb->len < mss_now);  in tcp_push_one()
2312 	tcp_write_xmit(sk, mss_now, TCP_NAGLE_PUSH, 1, sk->sk_allocation);  in tcp_push_one()