netdev - Re: [PATCH net-next 2/8] tcp: accept SOF_TIMESTAMPING_OPT

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Message-ID: <CAF=yD-KZJM8KL5ncH2OK=PmKrXagqTdayPNwkuDiKu4MLkhztw@mail.gmail.com>
Date:	Wed, 30 Mar 2016 23:35:40 -0400
From:	Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:	Soheil Hassas Yeganeh <soheil.kdev@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	Network Development <netdev@...r.kernel.org>,
	Willem de Bruijn <willemb@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Yuchung Cheng <ycheng@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>,
	Martin KaFai Lau <kafai@...com>,
	Soheil Hassas Yeganeh <soheil@...gle.com>
Subject: Re: [PATCH net-next 2/8] tcp: accept SOF_TIMESTAMPING_OPT_ID for
 passive TFO

On Wed, Mar 30, 2016 at 6:37 PM, Soheil Hassas Yeganeh
<soheil.kdev@...il.com> wrote:
> From: Soheil Hassas Yeganeh <soheil@...gle.com>
>
> SOF_TIMESTAMPING_OPT_ID is set to get data-independent IDs
> to associate timestamps with send calls. For TCP connections,
> tp->snd_una is used as the starting point to calculate
> relative IDs.
>
> This socket option will fail if set before the handshake on a
> passive TCP fast open connection with data in SYN or SYN/ACK,
> since setsockopt requires the connection to be in the
> ESTABLISHED state.
>
> To address these, instead of limiting the option to the
> ESTABLISHED state, accept the SOF_TIMESTAMPING_OPT_ID option as
> long as the connection is not in LISTEN or CLOSE states.
>
> Signed-off-by: Soheil Hassas Yeganeh <soheil@...gle.com>

Acked-by: Willem de Bruijn <willemb@...gle.com>