linux-kernel - Re: [PATCH v3 6/8] socket: Add SO_TIMESTAMP[NS]

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Message-ID: <CAF=yD-L_KbVEbMaY6-3uA4Sp7gDMPEcF7+74J4TzukXb33t55w@mail.gmail.com>
Date:   Tue, 8 Jan 2019 09:03:04 -0500
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Deepa Dinamani <deepa.kernel@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Ralf Baechle <ralf@...ux-mips.org>, rth@...ddle.net,
        linux-alpha@...r.kernel.org,
        "open list:RALINK MIPS ARCHITECTURE" <linux-mips@...ux-mips.org>,
        Parisc List <linux-parisc@...r.kernel.org>,
        linux-rdma@...r.kernel.org, sparclinux <sparclinux@...r.kernel.org>
Subject: Re: [PATCH v3 6/8] socket: Add SO_TIMESTAMP[NS]_NEW

On Mon, Jan 7, 2019 at 10:29 PM Deepa Dinamani <deepa.kernel@...il.com> wrote:
>
> Add SO_TIMESTAMP_NEW and SO_TIMESTAMPNS_NEW variants of
> socket timestamp options.
> These are the y2038 safe versions of the SO_TIMESTAMP_OLD
> and SO_TIMESTAMPNS_OLD for all architectures.
>
> Note that the format of scm_timestamping.ts[0] is not changed
> in this patch.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com>
> Cc: jejb@...isc-linux.org
> Cc: ralf@...ux-mips.org
> Cc: rth@...ddle.net
> Cc: linux-alpha@...r.kernel.org
> Cc: linux-mips@...ux-mips.org
> Cc: linux-parisc@...r.kernel.org
> Cc: linux-rdma@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Cc: sparclinux@...r.kernel.org

> @@ -1864,20 +1864,39 @@ static void tcp_update_recv_tstamps(struct sk_buff *skb,
>  static void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
>                                struct scm_timestamping *tss)
>  {
> -       struct __kernel_old_timeval tv;
>         bool has_timestamping = false;
> +       int new_tstamp = sock_flag(sk, SOCK_TSTAMP_NEW);

nit: move above has_timestamping to maintain reverse christmas tree ordering