netdev - Re: [RFC net-next 0/3] Proposal for VRF-lite

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Message-ID: <CAJmoNQFMdN5purj9TsUAmuEExQy0tmENjS2CyTrkbqWneb+ziQ@mail.gmail.com>
Date:	Mon, 8 Jun 2015 12:51:04 -0700
From:	Shrijeet Mukherjee <shm@...ulusnetworks.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Jamal Hadi Salim <hadi@...atatu.com>,
	David Miller <davem@...emloft.net>,
	Stephen Hemminger <stephen@...workplumber.org>,
	Netdev <netdev@...r.kernel.org>,
	Roopa Prabhu <roopa@...ulusnetworks.com>,
	Andy Gospodarek <gospo@...ulusnetworks.com>,
	Jon Toppins <jtoppins@...ulusnetworks.com>,
	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: Re: [RFC net-next 0/3] Proposal for VRF-lite

Good catch, as you know I used to have the device getting modified in
the RX path and that made it all work

generic ip_rcv will need a fix to make RX visible to tcpdump, but yes,
that is the goal.

On Mon, Jun 8, 2015 at 12:13 PM, David Ahern <dsahern@...il.com> wrote:
> On 6/8/15 12:35 PM, Shrijeet Mukherjee wrote:
>>
>> 5. Debugging is built-in as tcpdump and counters on the VRF device
>>     works as is.
>
>
> Is the intent that something like this
>
>   tcpdump -i vrf0
>
> can be used to see vrf traffic?
>
> vrf_handle_frame only bumps counters; it does not switch skb->dev to the vrf
> device so for Rx path tcpdump will not get the packets. ie., tcpdump only
> shows outbound packets.
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