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net: tcp: introduce tcp_drop_reason()

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For TCP protocol, tcp_drop() is used to free the skb when it needs
to be dropped. To make use of kfree_skb_reason() and pass the drop
reason to it, introduce the function tcp_drop_reason(). Meanwhile,
make tcp_drop() an inline call to tcp_drop_reason().

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Menglong Dong 2022-02-20 15:06:29 +08:00 committed by David S. Miller
parent 48c77bdf72
commit 082116ffcb
1 changed files with 8 additions and 2 deletions
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10
net/ipv4/tcp_input.c
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@ -4684,10 +4684,16 @@ static bool tcp_ooo_try_coalesce(struct sock *sk,
return res;
}
static void tcp_drop(struct sock *sk, struct sk_buff *skb)
static void tcp_drop_reason(struct sock *sk, struct sk_buff *skb,
enum skb_drop_reason reason)
{
sk_drops_add(sk, skb);
__kfree_skb(skb);
kfree_skb_reason(skb, reason);
}
static void tcp_drop(struct sock *sk, struct sk_buff *skb)
{
tcp_drop_reason(sk, skb, SKB_DROP_REASON_NOT_SPECIFIED);
}
/* This one checks to see if we can put data from the