netdev - [PATCH net-next 6/6] tcp: tcp_set_window

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Message-ID: <20250228132248.25899-7-edumazet@google.com>
Date: Fri, 28 Feb 2025 13:22:48 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Neal Cardwell <ncardwell@...gle.com>
Cc: Kuniyuki Iwashima <kuniyu@...zon.com>, Simon Horman <horms@...nel.org>, netdev@...r.kernel.org, 
	eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 6/6] tcp: tcp_set_window_clamp() cleanup

Remove one indentation level.

Use max_t() and clamp() macros.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv4/tcp.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 1184866922130aff0f4a4e6d5c0d95fd42713b7d..eb5a60c7a9ccdd23fb78a74d614c18c4f7e281c9 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3693,33 +3693,33 @@ EXPORT_SYMBOL(tcp_sock_set_keepcnt);
 
 int tcp_set_window_clamp(struct sock *sk, int val)
 {
+	u32 old_window_clamp, new_window_clamp;
 	struct tcp_sock *tp = tcp_sk(sk);
 
 	if (!val) {
 		if (sk->sk_state != TCP_CLOSE)
 			return -EINVAL;
 		WRITE_ONCE(tp->window_clamp, 0);
-	} else {
-		u32 new_rcv_ssthresh, old_window_clamp = tp->window_clamp;
-		u32 new_window_clamp = val < SOCK_MIN_RCVBUF / 2 ?
-						SOCK_MIN_RCVBUF / 2 : val;
+		return 0;
+	}
 
-		if (new_window_clamp == old_window_clamp)
-			return 0;
+	old_window_clamp = tp->window_clamp;
+	new_window_clamp = max_t(int, SOCK_MIN_RCVBUF / 2, val);
 
-		WRITE_ONCE(tp->window_clamp, new_window_clamp);
-		if (new_window_clamp < old_window_clamp) {
-			/* need to apply the reserved mem provisioning only
-			 * when shrinking the window clamp
-			 */
-			__tcp_adjust_rcv_ssthresh(sk, tp->window_clamp);
+	if (new_window_clamp == old_window_clamp)
+		return 0;
 
-		} else {
-			new_rcv_ssthresh = min(tp->rcv_wnd, tp->window_clamp);
-			tp->rcv_ssthresh = max(new_rcv_ssthresh,
-					       tp->rcv_ssthresh);
-		}
-	}
+	WRITE_ONCE(tp->window_clamp, new_window_clamp);
+
+	/* Need to apply the reserved mem provisioning only
+	 * when shrinking the window clamp.
+	 */
+	if (new_window_clamp < old_window_clamp)
+		__tcp_adjust_rcv_ssthresh(sk, new_window_clamp);
+	else
+		tp->rcv_ssthresh = clamp(new_window_clamp,
+					 tp->rcv_ssthresh,
+					 tp->rcv_wnd);
 	return 0;
 }
 
-- 
2.48.1.711.g2feabab25a-goog