* Netlink event for network device statistics
@ 2009-11-29 22:56 Marcel Holtmann
2009-12-01 11:28 ` Patrick McHardy
0 siblings, 1 reply; 3+ messages in thread
From: Marcel Holtmann @ 2009-11-29 22:56 UTC (permalink / raw)
To: netdev
Hi everyone,
so I was playing with monitoring network device statistics and storing
them over a period of time. While netlink and ethtool provides all the
network packet statistics, I have a problem with devices that are
actually hotplug. Especially 3G cards that get taken off the bus via
RFKILL and external dongles that can be unplugged at any time.
So I was thinking that before we send the DELLINK netlink event for that
interface, we should send the latest statistic details via netlink. Is
that a good idea or is there another way to get up-to-date statistics
without polling for them?
Regards
Marcel
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Netlink event for network device statistics
2009-11-29 22:56 Netlink event for network device statistics Marcel Holtmann
@ 2009-12-01 11:28 ` Patrick McHardy
2009-12-01 13:36 ` Marcel Holtmann
0 siblings, 1 reply; 3+ messages in thread
From: Patrick McHardy @ 2009-12-01 11:28 UTC (permalink / raw)
To: Marcel Holtmann; +Cc: netdev
Marcel Holtmann wrote:
> Hi everyone,
>
> so I was playing with monitoring network device statistics and storing
> them over a period of time. While netlink and ethtool provides all the
> network packet statistics, I have a problem with devices that are
> actually hotplug. Especially 3G cards that get taken off the bus via
> RFKILL and external dongles that can be unplugged at any time.
>
> So I was thinking that before we send the DELLINK netlink event for that
> interface, we should send the latest statistic details via netlink. Is
> that a good idea or is there another way to get up-to-date statistics
> without polling for them?
Don't we already include them in the DELLINK message? rtnl_fill_ifinfo()
unconditionally includes the statistics.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Netlink event for network device statistics
2009-12-01 11:28 ` Patrick McHardy
@ 2009-12-01 13:36 ` Marcel Holtmann
0 siblings, 0 replies; 3+ messages in thread
From: Marcel Holtmann @ 2009-12-01 13:36 UTC (permalink / raw)
To: Patrick McHardy; +Cc: netdev
Hi Patrick,
> > so I was playing with monitoring network device statistics and storing
> > them over a period of time. While netlink and ethtool provides all the
> > network packet statistics, I have a problem with devices that are
> > actually hotplug. Especially 3G cards that get taken off the bus via
> > RFKILL and external dongles that can be unplugged at any time.
> >
> > So I was thinking that before we send the DELLINK netlink event for that
> > interface, we should send the latest statistic details via netlink. Is
> > that a good idea or is there another way to get up-to-date statistics
> > without polling for them?
>
> Don't we already include them in the DELLINK message? rtnl_fill_ifinfo()
> unconditionally includes the statistics.
you are correct. We already have the IFLA_STATS in DELLINK. I got
confused with ip monitor not decoding these and assumed they were not
included at all.
Regards
Marcel
^ permalink raw reply [flat|nested] 3+ messages in thread
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2009-11-29 22:56 Netlink event for network device statistics Marcel Holtmann
2009-12-01 11:28 ` Patrick McHardy
2009-12-01 13:36 ` Marcel Holtmann
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