netdev - [PATCH net-next 1/3] tcp: remove hdrlen argument from tcp_queue

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Message-Id: <20181121175240.6075-2-edumazet@google.com>
Date:   Wed, 21 Nov 2018 09:52:38 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Jean-Louis Dupond <jean-louis@...ond.be>,
        Neal Cardwell <ncardwell@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next 1/3] tcp: remove hdrlen argument from tcp_queue_rcv()

Only one caller needs to pull TCP headers, so lets
move __skb_pull() to the caller side.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv4/tcp_input.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index edaaebfbcd4693ef6689f3f4c71733b3888c7c2c..e0ad7d3825b5945049c099171ce36e5c8bb9ba99 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4602,13 +4602,12 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
 	}
 }
 
-static int __must_check tcp_queue_rcv(struct sock *sk, struct sk_buff *skb, int hdrlen,
-		  bool *fragstolen)
+static int __must_check tcp_queue_rcv(struct sock *sk, struct sk_buff *skb,
+				      bool *fragstolen)
 {
 	int eaten;
 	struct sk_buff *tail = skb_peek_tail(&sk->sk_receive_queue);
 
-	__skb_pull(skb, hdrlen);
 	eaten = (tail &&
 		 tcp_try_coalesce(sk, tail,
 				  skb, fragstolen)) ? 1 : 0;
@@ -4659,7 +4658,7 @@ int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size)
 	TCP_SKB_CB(skb)->end_seq = TCP_SKB_CB(skb)->seq + size;
 	TCP_SKB_CB(skb)->ack_seq = tcp_sk(sk)->snd_una - 1;
 
-	if (tcp_queue_rcv(sk, skb, 0, &fragstolen)) {
+	if (tcp_queue_rcv(sk, skb, &fragstolen)) {
 		WARN_ON_ONCE(fragstolen); /* should not happen */
 		__kfree_skb(skb);
 	}
@@ -4719,7 +4718,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 			goto drop;
 		}
 
-		eaten = tcp_queue_rcv(sk, skb, 0, &fragstolen);
+		eaten = tcp_queue_rcv(sk, skb, &fragstolen);
 		if (skb->len)
 			tcp_event_data_recv(sk, skb);
 		if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN)
@@ -5585,8 +5584,8 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb)
 			NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPHPHITS);
 
 			/* Bulk data transfer: receiver */
-			eaten = tcp_queue_rcv(sk, skb, tcp_header_len,
-					      &fragstolen);
+			__skb_pull(skb, tcp_header_len);
+			eaten = tcp_queue_rcv(sk, skb, &fragstolen);
 
 			tcp_event_data_recv(sk, skb);
 
-- 
2.19.1.1215.g8438c0b245-goog