From: Geliang Tang <tanggeliang@kylinos.cn>

It's necessary to delete netns during the MPTCP bpf tests interrupt,
otherwise the next tests run will fail due to unable to create netns.

This patch adds a new SIGINT handle sig_int, and deletes NS_TEST in it.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index 0b0da4556d91..307d4b360350 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -79,11 +79,18 @@ struct mptcp_storage {
 	char ca_name[TCP_CA_NAME_MAX];
 };
 
+static void sig_int(int sig)
+{
+	signal(sig, SIG_IGN);
+	SYS_NOFAIL("ip netns del %s", NS_TEST);
+}
+
 static struct nstoken *create_netns(void)
 {
 	SYS(fail, "ip netns add %s", NS_TEST);
 	SYS(fail, "ip -net %s link set dev lo up", NS_TEST);
 
+	signal(SIGINT, sig_int);
 	return open_netns(NS_TEST);
 fail:
 	return NULL;
-- 
2.40.1