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tcp: refactor tcp_ecn_check_ce to remove sk type cast 

[ Upstream commit f4c9f85f3b ]

Refactor tcp_ecn_check_ce and __tcp_ecn_check_ce to accept struct sock*
instead of tcp_sock* to clean up type casts. This is a pure refactor
patch.

Signed-off-by: Yousuk Seung <ysseung@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Yousuk Seung 2018-06-04 15:29:51 -07:00 committed by Greg Kroah-Hartman
parent fd31083cbe
commit 1f04d750f6
1 changed files with 14 additions and 12 deletions
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26
net/ipv4/tcp_input.c
View File

@ -250,8 +250,10 @@ static void tcp_ecn_withdraw_cwr(struct tcp_sock *tp)
tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
}
static void __tcp_ecn_check_ce(struct tcp_sock *tp, const struct sk_buff *skb)
static void __tcp_ecn_check_ce(struct sock *sk, const struct sk_buff *skb)
{
struct tcp_sock *tp = tcp_sk(sk);
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,
@ -259,31 +261,31 @@ static void __tcp_ecn_check_ce(struct tcp_sock *tp, const struct sk_buff *skb)
* it is probably a retransmit.
*/
if (tp->ecn_flags & TCP_ECN_SEEN)
tcp_enter_quickack_mode((struct sock *)tp, 1);
tcp_enter_quickack_mode(sk, 1);
break;
case INET_ECN_CE:
if (tcp_ca_needs_ecn((struct sock *)tp))
tcp_ca_event((struct sock *)tp, CA_EVENT_ECN_IS_CE);
if (tcp_ca_needs_ecn(sk))
tcp_ca_event(sk, CA_EVENT_ECN_IS_CE);
if (!(tp->ecn_flags & TCP_ECN_DEMAND_CWR)) {
/* Better not delay acks, sender can have a very low cwnd */
tcp_enter_quickack_mode((struct sock *)tp, 1);
tcp_enter_quickack_mode(sk, 1);
tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
}
tp->ecn_flags |= TCP_ECN_SEEN;
break;
default:
if (tcp_ca_needs_ecn((struct sock *)tp))
tcp_ca_event((struct sock *)tp, CA_EVENT_ECN_NO_CE);
if (tcp_ca_needs_ecn(sk))
tcp_ca_event(sk, CA_EVENT_ECN_NO_CE);
tp->ecn_flags |= TCP_ECN_SEEN;
break;
}
}
static void tcp_ecn_check_ce(struct tcp_sock *tp, const struct sk_buff *skb)
static void tcp_ecn_check_ce(struct sock *sk, const struct sk_buff *skb)
{
if (tp->ecn_flags & TCP_ECN_OK)
__tcp_ecn_check_ce(tp, 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)
@ -710,7 +712,7 @@ static void tcp_event_data_recv(struct sock *sk, struct sk_buff *skb)
}
icsk->icsk_ack.lrcvtime = now;
tcp_ecn_check_ce(tp, skb);
tcp_ecn_check_ce(sk, skb);
if (skb->len >= 128)
tcp_grow_window(sk, skb);
@ -4443,7 +4445,7 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
u32 seq, end_seq;
bool fragstolen;
tcp_ecn_check_ce(tp, skb);
tcp_ecn_check_ce(sk, skb);
if (unlikely(tcp_try_rmem_schedule(sk, skb, skb->truesize))) {
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFODROP);