netdev - Re: [PATCH net-next] bpf: introduce bpf_clone

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Message-ID: <CAJ3xEMgqw3Kj5SdBDsyr18z_n4n6BeOJLcjK2iMnaqMwuJ+tEw@mail.gmail.com>
Date:	Thu, 4 Jun 2015 09:45:13 +0300
From:	Or Gerlitz <gerlitz.or@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	Alexei Starovoitov <ast@...mgrid.com>,
	Daniel Borkmann <daniel@...earbox.net>,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] bpf: introduce bpf_clone_redirect() helper

On Thu, Jun 4, 2015 at 6:17 AM, David Miller <davem@...emloft.net> wrote:
> From: Alexei Starovoitov <ast@...mgrid.com>
> Date: Tue,  2 Jun 2015 16:03:14 -0700
>
>> Allow eBPF programs attached to classifier/actions to call
>> bpf_clone_redirect(skb, ifindex, flags) helper which will
>> mirror or redirect the packet by dynamic ifindex selection
>> from within the program to a target device either at ingress
>> or at egress. Can be used for various scenarios, for example,
>> to load balance skbs into veths, split parts of the traffic
>> to local taps, etc.
>>
>> Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>
>> Acked-by: Daniel Borkmann <daniel@...earbox.net>
>
> Applied, thanks.

build fails on my setup...

CC [M]  net/core/pktgen.o
net/core/filter.c: In function 'bpf_clone_redirect':
net/core/filter.c:1429: error: 'struct sk_buff' has no member named 'tc_verd'

you use skb->tc_verd but this code snippest goes along without being
dependent on CONFIG_NET_CLS_ACT
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