netdev - Re: [PATCH v3 bpf-next 13/15] selftest: Add test for xdp

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Date:   Mon, 27 Apr 2020 11:58:54 -0600
From:   David Ahern <dsahern@...il.com>
To:     John Fastabend <john.fastabend@...il.com>,
        David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        prashantbhole.linux@...il.com, jasowang@...hat.com,
        brouer@...hat.com, toke@...hat.com, toshiaki.makita1@...il.com,
        daniel@...earbox.net, ast@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, andriin@...com,
        David Ahern <dahern@...italocean.com>
Subject: Re: [PATCH v3 bpf-next 13/15] selftest: Add test for xdp_egress

On 4/27/20 11:52 AM, John Fastabend wrote:
> Also would be nice to have a test case for the xdp redirect into tx case. I think
> this is only going to test the skb path?

I have tests for the xdp_frame case, but it requires multiple nodes -
not namespaces. Multiple node tests no longer fall into the 'selftest'
category. I am not aware of any way to do XDP_REDIRECT testing within a
single node; general shortcoming with all xdp_frame specific tests.