Em Fri, Dec 21, 2007 at 06:56:17AM +0100, Eric Dumazet escreveu:
> Before submiting a patch to change a divide to a right shift, I felt
> necessary to create a helper function tcp_mtu_probing() to reduce length of
> lines exceeding 100 chars in tcp_write_timeout().
>
> Signed-off-by: Eric Dumazet <[EMAIL PROTECTED]>
>
> diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
> index d8970ec..8f14808 100644
> --- a/net/ipv4/tcp_timer.c
> +++ b/net/ipv4/tcp_timer.c
> @@ -114,13 +114,31 @@ static int tcp_orphan_retries(struct sock *sk, int
> alive)
> return retries;
> }
>
> +static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock
> *sk)
> +{
> + int mss;
- int mss;
> +
> + /* Black hole detection */
> + if (sysctl_tcp_mtu_probing) {
> + if (!icsk->icsk_mtup.enabled) {
> + icsk->icsk_mtup.enabled = 1;
> + tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
> + } else {
> + struct tcp_sock *tp = tcp_sk(sk);
+ int mss;
> + mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low)/2;
> + mss = min(sysctl_tcp_base_mss, mss);
> + mss = max(mss, 68 - tp->tcp_header_len);
> + icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
> + tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
> + }
> + }
> +}
:-)
- Arnaldo
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