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tcp: introduce TCP_SKB_CB(skb)->tcp_tw_isn

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TCP_SKB_CB(skb)->when has different meaning in output and input paths.

In output path, it contains a timestamp.
In input path, it contains an ISN, chosen by tcp_timewait_state_process()

Lets add a different name to ease code comprehension.

Note that 'when' field will disappear in following patch,
as skb_mstamp already contains timestamp, the anonymous
union will promptly disappear as well.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2014-09-05 15:33:32 -07:00
committed by David S. Miller
parent 2ba38943ba
commit 04317dafd1
5 changed files with 11 additions and 6 deletions
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2
net/ipv4/tcp_input.c
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@@ -5906,7 +5906,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
struct request_sock *req;
struct tcp_sock *tp = tcp_sk(sk);
struct dst_entry *dst = NULL;
__u32 isn = TCP_SKB_CB(skb)->when;
__u32 isn = TCP_SKB_CB(skb)->tcp_tw_isn;
bool want_cookie = false, fastopen;
struct flowi fl;
struct tcp_fastopen_cookie foc = { .len = -1 };