Delivery Status Notification (Failure)

Delivery Status Notification (Failure)

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Fwd: Delivery Status Notification (Failure)

[Naveen]

Hi
     Right now the only way to detect if an interface has a peer(veth)
is touse ethtool -S. Instead I was thinking of adding it to device
attributes as a peer_ifndex entry. In drivers/net/veth.c I could add
an entry to
dev->groups for a veth specific group. Would that be acceptable ?

Thanks
Naveen

Re: Fwd: Delivery Status Notification (Failure)

[Andy Gospodarek]

On Thu, Sep 24, 2015 at 08:03:39AM -0400, Naveen wrote:
> Hi
>      Right now the only way to detect if an interface has a peer(veth)
> is touse ethtool -S. Instead I was thinking of adding it to device
> attributes as a peer_ifndex entry. In drivers/net/veth.c I could add
> an entry to
> dev->groups for a veth specific group. Would that be acceptable ?
> 

I've had similar discussions with others who agree with you that the
current method is not ideal -- especially when there are a large number
of namespaces in in use on a system.  One such proposal was to have the
output in ip link show (possibly only with the '-d' option), but no test
patches have been written yet....

Re: Delivery Status Notification (Failure)

[Jiri Benc]

On Thu, 24 Sep 2015 08:03:39 -0400, Naveen wrote:
>      Right now the only way to detect if an interface has a peer(veth)
> is touse ethtool -S. Instead I was thinking of adding it to device
> attributes as a peer_ifndex entry. In drivers/net/veth.c I could add
> an entry to
> dev->groups for a veth specific group. Would that be acceptable ?

Recent kernels announce the peer in IFLA_LINK, including its netnsid
(thus it's finally possible to track peers across net namespaces).
Just try "ip a" with a recent kernel.

 Jiri

-- 
Jiri Benc