netdev - Re: [PATCH] test_bpf: fix the dummy skb after dissector changes

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Date:   Mon, 12 Sep 2016 15:31:51 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Alexei Starovoitov <ast@...nel.org>
CC:     netdev@...r.kernel.org, Hadar Hen Zion <hadarh@...lanox.com>
Subject: Re: [PATCH] test_bpf: fix the dummy skb after dissector changes

On 09/12/2016 02:04 PM, Jakub Kicinski wrote:
> Commit d5709f7ab776 ("flow_dissector: For stripped vlan, get vlan
> info from skb->vlan_tci") made flow dissector look at vlan_proto
> when vlan is present.  Since test_bpf sets skb->vlan_tci to ~0
> (including VLAN_TAG_PRESENT) we have to populate skb->vlan_proto.
>
> Fixes false negative on test #24:
> test_bpf: #24 LD_PAYLOAD_OFF jited:0 175 ret 0 != 42 FAIL (1 times)
>
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
> Reviewed-by: Dinan Gunawardena <dinan.gunawardena@...ronome.com>

Acked-by: Daniel Borkmann <daniel@...earbox.net>