netdev - RE: [PATCH net-next 1/1] selftests/net: Add packetdrill packetdrill cases

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Message-ID:
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Date: Wed, 14 Jan 2026 10:49:46 +0000
From: "Chia-Yu Chang (Nokia)" <chia-yu.chang@...ia-bell-labs.com>
To: Neal Cardwell <ncardwell@...gle.com>
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Subject: RE: [PATCH net-next 1/1] selftests/net: Add packetdrill packetdrill
 cases

> -----Original Message-----
> From: Neal Cardwell <ncardwell@...gle.com> 
> Sent: Thursday, January 8, 2026 11:47 PM
> To: Chia-Yu Chang (Nokia) <chia-yu.chang@...ia-bell-labs.com>
> Cc: pabeni@...hat.com; edumazet@...gle.com; parav@...dia.com; linux-doc@...r.kernel.org; corbet@....net; horms@...nel.org; dsahern@...nel.org; kuniyu@...gle.com; bpf@...r.kernel.org; netdev@...r.kernel.org; dave.taht@...il.com; jhs@...atatu.com; kuba@...nel.org; stephen@...workplumber.org; xiyou.wangcong@...il.com; jiri@...nulli.us; davem@...emloft.net; andrew+netdev@...n.ch; donald.hunter@...il.com; ast@...erby.net; liuhangbin@...il.com; shuah@...nel.org; linux-kselftest@...r.kernel.org; ij@...nel.org; Koen De Schepper (Nokia) <koen.de_schepper@...ia-bell-labs.com>; g.white@...lelabs.com; ingemar.s.johansson@...csson.com; mirja.kuehlewind@...csson.com; cheshire <cheshire@...le.com>; rs.ietf@....at; Jason_Livingood@...cast.com; Vidhi Goel <vidhi_goel@...le.com>; Willem de Bruijn <willemb@...gle.com>
> Subject: Re: [PATCH net-next 1/1] selftests/net: Add packetdrill packetdrill cases
> 
> 
> CAUTION: This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext for additional information.
> 
> 
> 
> On Thu, Jan 8, 2026 at 10:58 AM <chia-yu.chang@...ia-bell-labs.com> wrote:
> >
> > From: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
> >
> > Linux Accurate ECN test sets using ACE counters and AccECN options to 
> > cover several scenarios: Connection teardown, different ACK 
> > conditions, counter wrapping, SACK space grabbing, fallback schemes, 
> > negotiation retransmission/reorder/loss, AccECN option drop/loss, 
> > different handshake reflectors, data with marking, and different sysctl values.
> >
> > Co-developed-by: Ilpo Järvinen <ij@...nel.org>
> > Signed-off-by: Ilpo Järvinen <ij@...nel.org>
> > Co-developed-by: Neal Cardwell <ncardwell@...gle.com>
> > Signed-off-by: Neal Cardwell <ncardwell@...gle.com>
> > ---
> 
> Chia-Yu, thank you for posting the packetdrill tests.
> 
> A couple thoughts:
> 
> (1) These tests are using the experimental AccECN packetdrill support that is not in mainline packetdrill yet. Can you please share the github URL for the version of packetdrill you used? I will work on merging the appropriate experimental AccECN packetdrill support into the Google packetdrill mainline branch.
> 
> (2) The last I heard, the tools/testing/selftests/net/packetdrill/
> infrastructure does not run tests in subdirectories of that packetdrill/ directory, and that is why all the tests in tools/testing/selftests/net/packetdrill/ are in a single directory.
> When you run these tests, do all the tests actually get run? Just wanted to check this. :-)
> 
> Thanks!
> neal

Hi Neal,

Regards (2), I will put all ACCECN cases in the tools/testing/selftests/net/packetdrill/
But I would like to include another script to avoid running these AccECN tests one-by-one manually, does it make sense to you?
Thanks.

Chia-Yu