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selftests: mptcp: join: support local endpoint being tracked or not

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commit d4c81bbb86 upstream.

Selftests are supposed to run on any kernels, including the old ones not
supporting all MPTCP features.

At some points, a new feature caused internal behaviour changes we are
verifying in the selftests, see the Fixes tag below. It was not a uAPI
change but because in these selftests, we check some internal
behaviours, it is normal we have to adapt them from time to time after
having added some features.

It is possible to look for "mptcp_pm_subflow_check_next" in kallsyms
because it was needed to introduce the mentioned feature. So we can know
in advance what the behaviour we are expecting here instead of
supporting the two behaviours.

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: 86e39e0448 ("mptcp: keep track of local endpoint still available for each msk")
Cc: stable@vger.kernel.org
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthieu Baerts 2023-06-10 18:11:41 +02:00 committed by Greg Kroah-Hartman
parent 1c0d9b4b47
commit 0381f30735
1 changed files with 11 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
tools/testing/selftests/net/mptcp/mptcp_join.sh
View file

@ -2064,11 +2064,18 @@ signal_address_tests()
# the peer could possibly miss some addr notification, allow retransmission
ip netns exec $ns1 sysctl -q net.mptcp.add_addr_timeout=1
run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
chk_join_nr 3 3 3
# the server will not signal the address terminating
# the MPC subflow
chk_add_nr 3 3
# It is not directly linked to the commit introducing this
# symbol but for the parent one which is linked anyway.
if ! mptcp_lib_kallsyms_has "mptcp_pm_subflow_check_next$"; then
chk_join_nr 3 3 2
chk_add_nr 4 4
else
chk_join_nr 3 3 3
# the server will not signal the address terminating
# the MPC subflow
chk_add_nr 3 3
fi
fi
}