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selftests: mptcp: join: check removing signal+subflow endp

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This validates the previous commit: endpoints with both the signal and
subflow flags should always be marked as used even if it was not
possible to create new subflows due to the MPTCP PM limits.

For this test, an extra endpoint is created with both the signal and the
subflow flags, and limits are set not to create extra subflows. In this
case, an ADD_ADDR is sent, but no subflows are created. Still, the local
endpoint is marked as used, and no warning is fired when removing the
endpoint, after having sent a RM_ADDR.

The 'Fixes' tag here below is the same as the one from the previous
commit: this patch here is not fixing anything wrong in the selftests,
but it validates the previous fix for an issue introduced by this commit
ID.

Fixes: 85df533a78 ("mptcp: pm: do not ignore 'subflow' if 'signal' flag is also set")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20260303-net-mptcp-misc-fixes-7-0-rc2-v1-5-4b5462b6f016@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Matthieu Baerts (NGI0) 2026-03-03 11:56:06 +01:00 • committed by Jakub Kicinski
parent 579a752464
commit 1777f349ff
1 changed files with 13 additions and 0 deletions
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13
tools/testing/selftests/net/mptcp/mptcp_join.sh
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@ -2626,6 +2626,19 @@ remove_tests()
chk_rst_nr 0 0
fi
# signal+subflow with limits, remove
if reset "remove signal+subflow with limits"; then
pm_nl_set_limits $ns1 0 0
pm_nl_add_endpoint $ns1 10.0.2.1 flags signal,subflow
pm_nl_set_limits $ns2 0 0
addr_nr_ns1=-1 speed=slow \
run_tests $ns1 $ns2 10.0.1.1
chk_join_nr 0 0 0
chk_add_nr 1 1
chk_rm_nr 1 0 invert
chk_rst_nr 0 0
fi
# addresses remove
if reset "remove addresses"; then
pm_nl_set_limits $ns1 3 3