6.1-stable review patch. If anyone has any objections, please let me know.
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From: "Matthieu Baerts (NGI0)" matttbe@kernel.org
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: 06faa2271034 ("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@... 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 --- tools/testing/selftests/net/mptcp/mptcp_join.sh | 29 ++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh @@ -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()