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Date: Mon, 31 Mar 2014 09:49:52 -0700 From: Florian Fainelli <f.fainelli@...il.com> To: David Decotigny <decot@...glers.com> Cc: Stephen Hemminger <stephen@...workplumber.org>, "David S. Miller" <davem@...emloft.net>, Jamal Hadi Salim <jhs@...atatu.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Eric Dumazet <edumazet@...gle.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Weilong Chen <chenweilong@...wei.com>, Jiri Pirko <jiri@...nulli.us>, Amir Vadai <amirv@...lanox.com>, Michael Dalton <mwdalton@...gle.com>, Al Viro <viro@...iv.linux.org.uk>, Tejun Heo <tj@...nel.org>, Eric Dumazet <eric.dumazet@...il.com> Subject: Re: [PATCH net-next v2] net-sysfs: expose number of carrier on/off changes Hi David, 2014-03-30 8:18 GMT-07:00 David Decotigny <decot@...glers.com>: > Hi all, > > As Eric mentioned, this is a per-link counter. I am not sure an > aggregate stat would be as useful. > > As suggested by Florian, I'm planning to add a doc. As far as I can > tell, I think it goes beyond just documenting this new counter: I > believe sysfs-class-net needs to be added as a whole. Right, I sort of started to do that here: http://patchwork.ozlabs.org/patch/334888/ Once this gets accepted, I plan on documenting the other sysfs attributes in statistics/ and queues/ in particular > > Stephen: I have a patch for iproute2, I was planning to send it after > we're done with this one, unless you want it now. Also, should I > document this IFLA thing, where would be best? > > On Sat, Mar 29, 2014 at 6:50 PM, Eric Dumazet <eric.dumazet@...il.com> wrote: >> On Sat, 2014-03-29 at 18:36 -0700, Stephen Hemminger wrote: >>> On Sat, 29 Mar 2014 09:48:35 -0700 >>> David Decotigny <decot@...glers.com> wrote: >>> >>> > This allows to monitor carrier on/off transitions and detect link >>> > flapping issues: >>> > - new /sys/class/net/X/carrier_changes >>> > - new rtnetlink IFLA_CARRIER_CHANGES (getlink) >>> > >>> > Tested: >>> > - grep . /sys/class/net/*/carrier_changes >>> > + ip link set dev X down/up >>> > + plug/unplug cable >>> > - updated iproute2: prints IFLA_CARRIER_CHANGES >>> > - iproute2 20121211-2 (debian): unchanged behavior >>> > >>> > Signed-off-by: David Decotigny <decot@...glers.com> >>> >>> Is there a related SNMP MIB variable? should there be? >> >> I don't think we have any SNMP MIB variable for devices ? >> >> It seems "ip link" is the facto standard. >> >> (BTW we put BusyPollRxPackets in TcpExt group, this was an error IMHO) >> >> -- Florian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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