From: Paolo Abeni pabeni@redhat.com
The mptcp diag interface already experienced a few locking bugs that lockdep and appropriate coverage have detected in advance.
Let's add a test-case triggering the relevant code path, to prevent similar issues in the future.
Be careful to cope with very slow environments.
Note that we don't need an explicit timeout on the mptcp_connect subprocess to cope with eventual bug/hang-up as the final cleanup terminating the child processes will take care of that.
Signed-off-by: Paolo Abeni pabeni@redhat.com Reviewed-by: Matthieu Baerts (NGI0) matttbe@kernel.org Signed-off-by: Matthieu Baerts (NGI0) matttbe@kernel.org --- tools/testing/selftests/net/mptcp/diag.sh | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/mptcp/diag.sh b/tools/testing/selftests/net/mptcp/diag.sh index 0a58ebb8b04c..f300f4e1eb59 100755 --- a/tools/testing/selftests/net/mptcp/diag.sh +++ b/tools/testing/selftests/net/mptcp/diag.sh @@ -20,7 +20,7 @@ flush_pids()
ip netns pids "${ns}" | xargs --no-run-if-empty kill -SIGUSR1 &>/dev/null
- for _ in $(seq 10); do + for _ in $(seq $((timeout_poll * 10))); do [ -z "$(ip netns pids "${ns}")" ] && break sleep 0.1 done @@ -91,6 +91,15 @@ chk_msk_nr() __chk_msk_nr "grep -c token:" "$@" }
+chk_listener_nr() +{ + local expected=$1 + local msg="$2" + + __chk_nr "ss -inmlHMON $ns | wc -l" "$expected" "$msg - mptcp" 0 + __chk_nr "ss -inmlHtON $ns | wc -l" "$expected" "$msg - subflows" +} + wait_msk_nr() { local condition="grep -c token:" @@ -289,5 +298,24 @@ flush_pids chk_msk_inuse 0 "many->0" chk_msk_cestab 0 "many->0"
+chk_listener_nr 0 "no listener sockets" +NR_SERVERS=100 +for I in $(seq 1 $NR_SERVERS); do + ip netns exec $ns ./mptcp_connect -p $((I + 20001)) \ + -t ${timeout_poll} -l 0.0.0.0 >/dev/null 2>&1 & +done + +for I in $(seq 1 $NR_SERVERS); do + mptcp_lib_wait_local_port_listen $ns $((I + 20001)) +done + +chk_listener_nr $NR_SERVERS "many listener sockets" + +# graceful termination +for I in $(seq 1 $NR_SERVERS); do + echo a | ip netns exec $ns ./mptcp_connect -p $((I + 20001)) 127.0.0.1 >/dev/null 2>&1 & +done +flush_pids + mptcp_lib_result_print_all_tap exit $ret