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tcp: tcp_send_challenge_ack delete useless param `skb` 

After this parameter is passed in, there is no usage, and deleting it will
 not bring any impact.

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Benjamin Yim <yan2228598786@gmail.com>
Link: https://lore.kernel.org/r/20220109130824.2776-1-yan2228598786@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Benjamin Yim 2022-01-09 21:08:24 +08:00 committed by Jakub Kicinski
parent 0959a82ab3
commit 208dd45d8d
1 changed files with 5 additions and 5 deletions
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10
net/ipv4/tcp_input.c
View File

@ -3601,7 +3601,7 @@ bool tcp_oow_rate_limited(struct net *net, const struct sk_buff *skb,
}
/* RFC 5961 7 [ACK Throttling] */
static void tcp_send_challenge_ack(struct sock *sk, const struct sk_buff *skb)
static void tcp_send_challenge_ack(struct sock *sk)
{
/* unprotected vars, we dont care of overwrites */
static u32 challenge_timestamp;
@ -3763,7 +3763,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag)
/* RFC 5961 5.2 [Blind Data Injection Attack].[Mitigation] */
if (before(ack, prior_snd_una - tp->max_window)) {
if (!(flag & FLAG_NO_CHALLENGE_ACK))
tcp_send_challenge_ack(sk, skb);
tcp_send_challenge_ack(sk);
return -1;
}
goto old_ack;
@ -5726,7 +5726,7 @@ static bool tcp_validate_incoming(struct sock *sk, struct sk_buff *skb,
if (tp->syn_fastopen && !tp->data_segs_in &&
sk->sk_state == TCP_ESTABLISHED)
tcp_fastopen_active_disable(sk);
tcp_send_challenge_ack(sk, skb);
tcp_send_challenge_ack(sk);
}
goto discard;
}
@ -5741,7 +5741,7 @@ static bool tcp_validate_incoming(struct sock *sk, struct sk_buff *skb,
if (syn_inerr)
TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPSYNCHALLENGE);
tcp_send_challenge_ack(sk, skb);
tcp_send_challenge_ack(sk);
goto discard;
}
@ -6456,7 +6456,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb)
if (!acceptable) {
if (sk->sk_state == TCP_SYN_RECV)
return 1; /* send one RST */
tcp_send_challenge_ack(sk, skb);
tcp_send_challenge_ack(sk);
goto discard;
}
switch (sk->sk_state) {