diff options
| author | Ilpo Järvinen <ij@kernel.org> | 2025-03-05 23:38:46 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2025-03-17 13:50:13 +0000 |
| commit | f0db2bca0cf9d35a348f8fa726c1f61879a5cd02 (patch) | |
| tree | 22625ba03ae49b905b0aefeb414e182694a794ea /net/ipv4/tcp_input.c | |
| parent | 2c2f08d31d2f6cd5621b121d596986bd54da679a (diff) | |
tcp: rework {__,}tcp_ecn_check_ce() -> tcp_data_ecn_check()
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@kernel.org>
Signed-off-by: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 771e075d457d..769048b559e5 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -365,10 +365,13 @@ 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, @@ -397,12 +400,6 @@ 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)) @@ -874,7 +871,7 @@ 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); @@ -5041,7 +5038,7 @@ 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); |