netdev - Re: [bpf-next PATCH v4 4/5] bpf: selftests, add sk

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Date:   Fri, 22 May 2020 11:20:28 +0200
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     John Fastabend <john.fastabend@...il.com>
Cc:     yhs@...com, andrii.nakryiko@...il.com, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org, bpf@...r.kernel.org,
        lmb@...udflare.com
Subject: Re: [bpf-next PATCH v4 4/5] bpf: selftests, add sk_msg helpers load
 and attach test

On Thu, 21 May 2020 21:25:06 -0700
John Fastabend <john.fastabend@...il.com> wrote:

> The test itself is not particularly useful but it encodes a common
> pattern we have.
> 
> Namely do a sk storage lookup then depending on data here decide if
> we need to do more work or alternatively allow packet to PASS. Then
> if we need to do more work consult task_struct for more information
> about the running task. Finally based on this additional information
> drop or pass the data. In this case the suspicious check is not so
> realisitic but it encodes the general pattern and uses the helpers
> so we test the workflow.
> 
> This is a load test to ensure verifier correctly handles this case.
> 
> Signed-off-by: John Fastabend <john.fastabend@...il.com>
> ---

Oh, that kind of "load test" :-)

Reviewed-by: Jakub Sitnicki <jakub@...udflare.com>