Re: [PATCH 5.10 51/84] selftests: mptcp: add ADD_ADDR timeout test case

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On Tue, 5 Jul 2022, Greg Kroah-Hartman wrote:

On Tue, Jul 05, 2022 at 05:59:22PM +0200, Matthieu Baerts wrote:
Hi Greg, Sasha,

(+ MPTCP upstream ML)

First, thank you again for maintaining the stable branches!

On 05/07/2022 13:58, Greg Kroah-Hartman wrote:
From: Geliang Tang <geliangtang@xxxxxxxxx>

[ Upstream commit 8d014eaa9254a9b8e0841df40dd36782b451579a ]

This patch added the test case for retransmitting ADD_ADDR when timeout
occurs. It set NS1's add_addr_timeout to 1 second, and drop NS2's ADD_ADDR
echo packets.
TL;DR: Could it be possible to drop all selftests MPTCP patches from
v5.10 queue please?


I was initially reacting on this patch because it looks like it depends on:

  93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout")

and indirectly to:

  9ce7deff92e8 ("docs: networking: mptcp: Add MPTCP sysctl entries")

to have "net.mptcp.add_addr_timeout" sysctl knob needed for this new
selftest.

But then I tried to understand why this current patch ("selftests:
mptcp: add ADD_ADDR timeout test case") has been selected for 5.10. I
guess it was to ease the backport of another one, right?
Looking at the 'series' file in 5.10 queue, it seems the new
"selftests-mptcp-more-stable-diag-tests" patch requires 5 other patches:

-> selftests-mptcp-more-stable-diag-tests.patch
 -> selftests-mptcp-fix-diag-instability.patch
  -> selftests-mptcp-launch-mptcp_connect-with-timeout.patch
   -> selftests-mptcp-add-add_addr-ipv6-test-cases.patch
    -> selftests-mptcp-add-link-failure-test-case.patch
     -> selftests-mptcp-add-add_addr-timeout-test-case.patch


When looking at these patches in more detail, it looks like "selftests:
mptcp: add ADD_ADDR IPv6 test cases" depends on a new feature only
available from v5.11: ADD_ADDR for IPv6.


Could it be possible to drop all these patches from v5.10 then please?

Sure, but leave them in for 5.15.y and 5.18.y?


Hi Greg -

I'm the other MPTCP maintainer, jumping in here due to Matt's time zone.

Yes: leave selftests-mptcp-more-stable-diag-tests.patch in 5.15.y and 5.18.y

--
Mat Martineau
Intel



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