6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
commit 5f94b08c001290acda94d9d8868075590931c198 upstream.
Removing the endpoint linked to the initial subflow should trigger a
RM_ADDR for the right ID, and the removal of the subflow. That's what is
now being verified in the "delete and re-add" test.
Note that removing the initial subflow will not decrement the 'subflows'
counters, which corresponds to the *additional* subflows. On the other
hand, when the same endpoint is re-added, it will increment this
counter, as it will be seen as an additional subflow this time.
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: 3ad14f54bd74 ("mptcp: more accurate MPC endpoint tracking")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Mat Martineau <martineau@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/net/mptcp/mptcp_join.sh | 25 +++++++++++++++++-------
1 file changed, 18 insertions(+), 7 deletions(-)
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -3578,8 +3578,9 @@ endpoint_tests()
if reset_with_tcp_filter "delete and 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 0 2
+ pm_nl_set_limits $ns1 0 3
+ pm_nl_set_limits $ns2 0 3
+ pm_nl_add_endpoint $ns2 10.0.1.2 id 1 dev ns2eth1 flags subflow
pm_nl_add_endpoint $ns2 10.0.2.2 id 2 dev ns2eth2 flags subflow
test_linkfail=4 speed=20 \
run_tests $ns1 $ns2 10.0.1.1 &
@@ -3588,17 +3589,17 @@ endpoint_tests()
wait_mpj $ns2
pm_nl_check_endpoint "creation" \
$ns2 10.0.2.2 id 2 flags subflow dev ns2eth2
- chk_subflow_nr "before delete" 2
+ chk_subflow_nr "before delete id 2" 2
chk_mptcp_info subflows 1 subflows 1
pm_nl_del_endpoint $ns2 2 10.0.2.2
sleep 0.5
- chk_subflow_nr "after delete" 1
+ chk_subflow_nr "after delete id 2" 1
chk_mptcp_info subflows 0 subflows 0
pm_nl_add_endpoint $ns2 10.0.2.2 id 2 dev ns2eth2 flags subflow
wait_mpj $ns2
- chk_subflow_nr "after re-add" 2
+ chk_subflow_nr "after re-add id 2" 2
chk_mptcp_info subflows 1 subflows 1
pm_nl_add_endpoint $ns2 10.0.3.2 id 3 flags subflow
@@ -3613,10 +3614,20 @@ endpoint_tests()
chk_subflow_nr "after no reject" 3
chk_mptcp_info subflows 2 subflows 2
+ pm_nl_del_endpoint $ns2 1 10.0.1.2
+ sleep 0.5
+ chk_subflow_nr "after delete id 0" 2
+ chk_mptcp_info subflows 2 subflows 2 # only decr for additional sf
+
+ pm_nl_add_endpoint $ns2 10.0.1.2 id 1 dev ns2eth1 flags subflow
+ wait_mpj $ns2
+ chk_subflow_nr "after re-add id 0" 3
+ chk_mptcp_info subflows 3 subflows 3
+
mptcp_lib_kill_wait $tests_pid
- chk_join_nr 3 3 3
- chk_rm_nr 1 1
+ chk_join_nr 4 4 4
+ chk_rm_nr 2 2
fi
}
