netdev - Re: [PATCH net-next 2/2] tools: psock_tpacket: verify that packet was received on lo before counting it

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Date:   Wed, 4 Jan 2017 11:12:20 -0500
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     linux-kselftest@...r.kernel.org,
        Network Development <netdev@...r.kernel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Willem de Bruijn <willemb@...gle.com>,
        David Miller <davem@...emloft.net>, shuah@...nel.org
Subject: Re: [PATCH net-next 2/2] tools: psock_tpacket: verify that packet
 was received on lo before counting it

On (01/04/17 11:07), Willem de Bruijn wrote:
> 
> Please do. Then the patch is just a one-line change to
> the third argument of the socket call. Thanks!

ok but it's going to be more than a one-line change. Today you
have
        sock = pfsocket(version);
        memset(&ring, 0, sizeof(ring));
        setup_ring(sock, &ring, version, type);
        mmap_ring(sock, &ring);
        bind_ring(sock, &ring);
        walk_ring(sock, &ring);

And the pair_udp_setfilter() only gets set up out of 
walk_ring. I think you want to move that up to be done before
bind_ring.