netdev - Re: [RFC v2 net-next 1/2] rtnetlink: Add new RTM_GETSYNCESTATE message to get SyncE status

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Message-ID: <20210830205758.GA26230@hoboy.vegasvil.org>
Date:   Mon, 30 Aug 2021 13:57:58 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     "Machnikowski, Maciej" <maciej.machnikowski@...el.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "abyagowi@...com" <abyagowi@...com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>
Subject: Re: [RFC v2 net-next 1/2] rtnetlink: Add new RTM_GETSYNCESTATE
 message to get SyncE status

On Sun, Aug 29, 2021 at 04:42:55PM +0000, Machnikowski, Maciej wrote:

> Please take a look at the 10.2 Operation modes of the G.8264 and at the Figure A.1
> which depicts the EEC. This interface is to report the status of the EEC.

Well, I read it, and it is still fairly high level with no mention at
all of "DPLL".  I hope that the new RTNL states will cover other
possible EEC implementations, too.

The "Reference source selection mechanism" is also quite vague.  Your
patch is more specific:

+enum if_eec_src {
+       IF_EEC_SRC_INVALID = 0,
+       IF_EEC_SRC_UNKNOWN,
+       IF_EEC_SRC_SYNCE,
+       IF_EEC_SRC_GNSS,
+       IF_EEC_SRC_PTP,
+       IF_EEC_SRC_EXT,
+       __IF_EEC_SRC_MAX,
+};

But I guess your list is reasonable.  It can always be expanded, right?


> If you prefer EEC over DPLL I'm fine with the name change. I think it will be less confusing.

Yes, thanks for doing that.

Thanks,
Richard