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Date:   Fri, 8 May 2020 11:31:07 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Soheil Hassas Yeganeh <soheil@...gle.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        Kelly Littlepage <kelly@...chronos.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Iris Liu <iris@...chronos.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Mike Maloney <maloney@...gle.com>,
        netdev <netdev@...r.kernel.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: Re: [PATCH v3] net: tcp: fix rx timestamp behavior for tcp_recvmsg

On Fri, May 8, 2020 at 10:58 AM Soheil Hassas Yeganeh <soheil@...gle.com> wrote:
>
> On Fri, May 8, 2020 at 10:45 AM Eric Dumazet <eric.dumazet@...il.com> wrote:
> >
> >
> >
> > On 5/8/20 7:23 AM, Kelly Littlepage wrote:
> > > The stated intent of the original commit is to is to "return the timestamp
> > > corresponding to the highest sequence number data returned." The current
> > > implementation returns the timestamp for the last byte of the last fully
> > > read skb, which is not necessarily the last byte in the recv buffer. This
> > > patch converts behavior to the original definition, and to the behavior of
> > > the previous draft versions of commit 98aaa913b4ed ("tcp: Extend
> > > SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg") which also match this
> > > behavior.
> > >
> > > Fixes: 98aaa913b4ed ("tcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg")
> > > Co-developed-by: Iris Liu <iris@...chronos.com>
> > > Signed-off-by: Iris Liu <iris@...chronos.com>
> > > Signed-off-by: Kelly Littlepage <kelly@...chronos.com>
> > > ---
> > > Reverted to the original subject line
> >
> >
> > SGTM, thanks.
> >
> > Signed-off-by: Eric Dumazet <edumazet@...gle.com>
>
> Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>

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

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