write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/net/ipv4/tcp_veno.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * TCP Veno congestion control
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  *
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@@ -6,7 +7,7 @@
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  *    "TCP Veno: TCP Enhancement for Transmission over Wireless Access Networks."
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  *    IEEE Journal on Selected Areas in Communication,
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  *    Feb. 2003.
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- * 	See http://www.ie.cuhk.edu.hk/fileadmin/staff_upload/soung/Journal/J3.pdf
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+ * 	See https://www.ie.cuhk.edu.hk/fileadmin/staff_upload/soung/Journal/J3.pdf
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  */
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 #include <linux/mm.h>
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@@ -152,31 +153,34 @@
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 		veno->diff = (tp->snd_cwnd << V_PARAM_SHIFT) - target_cwnd;
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 		if (tcp_in_slow_start(tp)) {
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-			/* Slow start.  */
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-			tcp_slow_start(tp, acked);
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-		} else {
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-			/* Congestion avoidance. */
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-			if (veno->diff < beta) {
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-				/* In the "non-congestive state", increase cwnd
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-				 *  every rtt.
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-				 */
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-				tcp_cong_avoid_ai(tp, tp->snd_cwnd, 1);
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-			} else {
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-				/* In the "congestive state", increase cwnd
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-				 * every other rtt.
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-				 */
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-				if (tp->snd_cwnd_cnt >= tp->snd_cwnd) {
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-					if (veno->inc &&
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-					    tp->snd_cwnd < tp->snd_cwnd_clamp) {
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-						tp->snd_cwnd++;
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-						veno->inc = 0;
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-					} else
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-						veno->inc = 1;
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-					tp->snd_cwnd_cnt = 0;
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-				} else
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-					tp->snd_cwnd_cnt++;
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-			}
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+			/* Slow start. */
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+			acked = tcp_slow_start(tp, acked);
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+			if (!acked)
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+				goto done;
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 		}
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+
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+		/* Congestion avoidance. */
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+		if (veno->diff < beta) {
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+			/* In the "non-congestive state", increase cwnd
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+			 * every rtt.
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+			 */
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+			tcp_cong_avoid_ai(tp, tp->snd_cwnd, acked);
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+		} else {
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+			/* In the "congestive state", increase cwnd
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+			 * every other rtt.
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+			 */
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+			if (tp->snd_cwnd_cnt >= tp->snd_cwnd) {
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+				if (veno->inc &&
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+				    tp->snd_cwnd < tp->snd_cwnd_clamp) {
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+					tp->snd_cwnd++;
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+					veno->inc = 0;
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+				} else
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+					veno->inc = 1;
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+				tp->snd_cwnd_cnt = 0;
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+			} else
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+				tp->snd_cwnd_cnt += acked;
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+		}
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+done:
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 		if (tp->snd_cwnd < 2)
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 			tp->snd_cwnd = 2;
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 		else if (tp->snd_cwnd > tp->snd_cwnd_clamp)