netdev - Re: [PATCH iproute2-next] ss: mptcp: print out last time counters

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Date: Sat, 13 Apr 2024 10:45:17 -0600
From: David Ahern <dsahern@...il.com>
To: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
Cc: netdev@...r.kernel.org, mptcp@...ts.linux.dev,
 Stephen Hemminger <stephen@...workplumber.org>,
 Mat Martineau <martineau@...nel.org>, Geliang Tang <geliang@...nel.org>
Subject: Re: [PATCH iproute2-next] ss: mptcp: print out last time counters

On 4/12/24 2:19 AM, Matthieu Baerts (NGI0) wrote:
> From: Geliang Tang <geliang@...nel.org>
> 
> Three new "last time" counters have been added to "struct mptcp_info":
> last_data_sent, last_data_recv and last_ack_recv. They have been added
> in commit 18d82cde7432 ("mptcp: add last time fields in mptcp_info") in
> net-next recently.
> 
> This patch prints out these new counters into mptcp_stats output in ss.
> 
> Signed-off-by: Geliang Tang <geliang@...nel.org>
> Acked-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
> ---
>  include/uapi/linux/mptcp.h | 4 ++++
>  misc/ss.c                  | 6 ++++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/include/uapi/linux/mptcp.h b/include/uapi/linux/mptcp.h
> index c2e6f3be..a0da2632 100644
> --- a/include/uapi/linux/mptcp.h
> +++ b/include/uapi/linux/mptcp.h

uapi headers are synced using scripts, meaning at best uapi updates
should be a separate patch (the updates can also be omitted).

> @@ -56,6 +56,10 @@ struct mptcp_info {
>  	__u64	mptcpi_bytes_received;
>  	__u64	mptcpi_bytes_acked;
>  	__u8	mptcpi_subflows_total;
> +	__u8	reserved[3];
> +	__u32	mptcpi_last_data_sent;
> +	__u32	mptcpi_last_data_recv;
> +	__u32	mptcpi_last_ack_recv;
>  };
>  
>  /* MPTCP Reset reason codes, rfc8684 */
> diff --git a/misc/ss.c b/misc/ss.c
> index 87008d7c..81b813c1 100644
> --- a/misc/ss.c
> +++ b/misc/ss.c
> @@ -3279,6 +3279,12 @@ static void mptcp_stats_print(struct mptcp_info *s)
>  		out(" bytes_acked:%llu", s->mptcpi_bytes_acked);
>  	if (s->mptcpi_subflows_total)
>  		out(" subflows_total:%u", s->mptcpi_subflows_total);
> +	if (s->mptcpi_last_data_sent)
> +		out(" last_data_sent:%u", s->mptcpi_last_data_sent);
> +	if (s->mptcpi_last_data_recv)
> +		out(" last_data_recv:%u", s->mptcpi_last_data_recv);
> +	if (s->mptcpi_last_ack_recv)
> +		out(" last_ack_recv:%u", s->mptcpi_last_ack_recv);
>  }
>  

applied to iproute2-next