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selftests: mptcp: join: test for flush/re-add endpoints

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commit e06959e9eebdfea4654390f53b65cff57691872e upstream.

After having flushed endpoints that didn't cause the creation of new
subflows, it is important to check endpoints can be re-created, re-using
previously used IDs.

Before the previous commit, the client would not have been able to
re-create the subflow that was previously rejected.

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: 06faa22710 ("mptcp: remove multi addresses and subflows in PM")
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/20240819-net-mptcp-pm-reusing-id-v1-6-38035d40de5b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
[ No conflicts, but adapt the test to the helpers in this version:
  - run_tests has been modified a few times to reduce the number of
    positional parameters
  - no chk_mptcp_info helper
  - chk_subflow_nr taking an extra parameter
  - kill_tests_wait instead of mptcp_lib_kill_wait ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthieu Baerts (NGI0)
2024-09-04 13:06:13 +02:00
committed by Greg Kroah-Hartman
parent 66864ca5c7
commit 7f72d7095b
1 changed files with 29 additions and 0 deletions
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29
tools/testing/selftests/net/mptcp/mptcp_join.sh
View File

@@ -3262,6 +3262,35 @@ userspace_tests()
kill_tests_wait
fi
# flush and re-add
if reset_with_tcp_filter "flush re-add" ns2 10.0.3.2 REJECT OUTPUT &&
mptcp_lib_kallsyms_has "subflow_rebuild_header$"; then
pm_nl_set_limits $ns1 0 2
pm_nl_set_limits $ns2 1 2
# broadcast IP: no packet for this address will be received on ns1
pm_nl_add_endpoint $ns1 224.0.0.1 id 2 flags signal
pm_nl_add_endpoint $ns2 10.0.3.2 id 3 flags subflow
run_tests $ns1 $ns2 10.0.1.1 4 0 0 speed_20 2>/dev/null &
local tests_pid=$!
wait_attempt_fail $ns2
chk_subflow_nr needtitle "before flush" 1
pm_nl_flush_endpoint $ns2
pm_nl_flush_endpoint $ns1
wait_rm_addr $ns2 0
ip netns exec "${ns2}" ${iptables} -D OUTPUT -s "10.0.3.2" -p tcp -j REJECT
pm_nl_add_endpoint $ns2 10.0.3.2 id 3 flags subflow
wait_mpj $ns2
pm_nl_add_endpoint $ns1 10.0.3.1 id 2 flags signal
wait_mpj $ns2
kill_wait "${tests_pid}"
kill_tests_wait
chk_join_nr 2 2 2
chk_add_nr 2 2
chk_rm_nr 1 0 invert
fi
}
endpoint_tests()