From: Ilpo Järvinen <ij@xxxxxxxxxx>
Rename tcp_ecn_check_ce to tcp_data_ecn_check as it is
called only for data segments, not for ACKs (with AccECN,
also ACKs may get ECN bits).
The extra "layer" in tcp_ecn_check_ce() function just
checks for ECN being enabled, that can be moved into
tcp_ecn_field_check rather than having the __ variant.
No functional changes.
Signed-off-by: Ilpo Järvinen <ij@xxxxxxxxxx>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/tcp_input.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 3295ad329aef..6d4abd452a36 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -357,10 +357,13 @@ static void tcp_ecn_withdraw_cwr(struct tcp_sock *tp)
tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR;
}
-static void __tcp_ecn_check_ce(struct sock *sk, const struct sk_buff *skb)
+static void tcp_data_ecn_check(struct sock *sk, const struct sk_buff *skb)
{
struct tcp_sock *tp = tcp_sk(sk);
+ if (!(tcp_sk(sk)->ecn_flags & TCP_ECN_OK))
+ return;
+
switch (TCP_SKB_CB(skb)->ip_dsfield & INET_ECN_MASK) {
case INET_ECN_NOT_ECT:
/* Funny extension: if ECT is not set on a segment,
@@ -389,12 +392,6 @@ static void __tcp_ecn_check_ce(struct sock *sk, const struct sk_buff *skb)
}
}
-static void tcp_ecn_check_ce(struct sock *sk, const struct sk_buff *skb)
-{
- if (tcp_sk(sk)->ecn_flags & TCP_ECN_OK)
- __tcp_ecn_check_ce(sk, skb);
-}
-
static void tcp_ecn_rcv_synack(struct tcp_sock *tp, const struct tcphdr *th)
{
if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || th->cwr))
@@ -866,7 +863,7 @@ static void tcp_event_data_recv(struct sock *sk, struct sk_buff *skb)
icsk->icsk_ack.lrcvtime = now;
tcp_save_lrcv_flowlabel(sk, skb);
- tcp_ecn_check_ce(sk, skb);
+ tcp_data_ecn_check(sk, skb);
if (skb->len >= 128)
tcp_grow_window(sk, skb, true);
@@ -5028,7 +5025,7 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
bool fragstolen;
tcp_save_lrcv_flowlabel(sk, skb);
- tcp_ecn_check_ce(sk, skb);
+ tcp_data_ecn_check(sk, skb);
if (unlikely(tcp_try_rmem_schedule(sk, skb, skb->truesize))) {
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFODROP);
--
2.34.1
