netdev - Re: [PATCH bpf v4 4/4] selftest/bpf: Test sockmap redirect for AF_UNIX MSG

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Message-ID: <87bk2x90hx.fsf@cloudflare.com>
Date: Tue, 16 Jul 2024 10:58:34 +0200
From: Jakub Sitnicki <jakub@...udflare.com>
To: Michal Luczaj <mhal@...x.co>
Cc: netdev@...r.kernel.org,  bpf@...r.kernel.org,  davem@...emloft.net,
  edumazet@...gle.com,  kuba@...nel.org,  pabeni@...hat.com,
  john.fastabend@...il.com,  kuniyu@...zon.com,  Rao.Shoaib@...cle.com,
  cong.wang@...edance.com
Subject: Re: [PATCH bpf v4 4/4] selftest/bpf: Test sockmap redirect for
 AF_UNIX MSG_OOB

On Sat, Jul 13, 2024 at 09:41 PM +02, Michal Luczaj wrote:
> Verify that out-of-band packets are silently dropped before they reach the
> redirection logic.
>
> The idea is to test with a 2 byte long send(). Should a MSG_OOB flag be in
> use, only the last byte will be treated as out-of-band. Test fails if
> verd_mapfd indicates a wrong number of packets processed (e.g. if OOB
> wasn't dropped at the source) or if it was possible to recv() MSG_OOB from
> the mapped socket, or if any stale OOB data have been left reachable from
> the unmapped socket.
>
> Signed-off-by: Michal Luczaj <mhal@...x.co>
> ---

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