linux-kernel - [PATCH bpf-next/net 4/5] selftests/bpf: More endpoints for endpoint

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Message-Id: <20241108-bpf-next-net-mptcp-bpf_iter-subflows-v1-4-cf16953035c1@kernel.org>
Date: Fri, 08 Nov 2024 16:52:33 +0100
From: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
To: mptcp@...ts.linux.dev, Mat Martineau <martineau@...nel.org>, 
 Geliang Tang <geliang@...nel.org>, "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
 Andrii Nakryiko <andrii@...nel.org>, 
 Martin KaFai Lau <martin.lau@...ux.dev>, 
 Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
 Yonghong Song <yonghong.song@...ux.dev>, 
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, 
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
 Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>, 
 Shuah Khan <shuah@...nel.org>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 bpf@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 "Matthieu Baerts (NGI0)" <matttbe@...nel.org>, 
 Geliang Tang <geliang@...nel.org>
Subject: [PATCH bpf-next/net 4/5] selftests/bpf: More endpoints for
 endpoint_init

From: Geliang Tang <tanggeliang@...inos.cn>

This patch changes ADDR_2 from "10.0.1.2" to "10.0.2.1", and adds two more
IPv4 test addresses ADDR_3 - ADDR_4, four IPv6 addresses ADDR6_1 - ADDR6_4.
Add a new helper address_init() to initialize all these addresses.

Add a new parameter "endpoints" for endpoint_init() to control how many
endpoints are used for the tests. This makes it more flexible. Update the
parameters of endpoint_init() in test_subflow().

Signed-off-by: Geliang Tang <tanggeliang@...inos.cn>
Reviewed-by: Mat Martineau <martineau@...nel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
---
 tools/testing/selftests/bpf/prog_tests/mptcp.c | 56 +++++++++++++++++++++++---
 1 file changed, 50 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index f8eb7f9d4fd20bbb7ee018728f7ae0f0a09d4d30..85f3d4119802a85c86cde7b74a0b857252bad8b8 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -14,7 +14,13 @@

 #define NS_TEST "mptcp_ns"
 #define ADDR_1	"10.0.1.1"
-#define ADDR_2	"10.0.1.2"
+#define ADDR_2	"10.0.2.1"
+#define ADDR_3	"10.0.3.1"
+#define ADDR_4	"10.0.4.1"
+#define ADDR6_1	"dead:beef:1::1"
+#define ADDR6_2	"dead:beef:2::1"
+#define ADDR6_3	"dead:beef:3::1"
+#define ADDR6_4	"dead:beef:4::1"
 #define PORT_1	10001

 #ifndef IPPROTO_MPTCP
@@ -322,22 +328,60 @@ static void test_mptcpify(void)
 	close(cgroup_fd);
 }

-static int endpoint_init(char *flags)
+static int address_init(void)
 {
 	SYS(fail, "ip -net %s link add veth1 type veth peer name veth2", NS_TEST);
 	SYS(fail, "ip -net %s addr add %s/24 dev veth1", NS_TEST, ADDR_1);
+	SYS(fail, "ip -net %s addr add %s/64 dev veth1 nodad", NS_TEST, ADDR6_1);
 	SYS(fail, "ip -net %s link set dev veth1 up", NS_TEST);
 	SYS(fail, "ip -net %s addr add %s/24 dev veth2", NS_TEST, ADDR_2);
+	SYS(fail, "ip -net %s addr add %s/64 dev veth2 nodad", NS_TEST, ADDR6_2);
 	SYS(fail, "ip -net %s link set dev veth2 up", NS_TEST);
-	if (SYS_NOFAIL("ip -net %s mptcp endpoint add %s %s", NS_TEST, ADDR_2, flags)) {
+
+	SYS(fail, "ip -net %s link add veth3 type veth peer name veth4", NS_TEST);
+	SYS(fail, "ip -net %s addr add %s/24 dev veth3", NS_TEST, ADDR_3);
+	SYS(fail, "ip -net %s addr add %s/64 dev veth3 nodad", NS_TEST, ADDR6_3);
+	SYS(fail, "ip -net %s link set dev veth3 up", NS_TEST);
+	SYS(fail, "ip -net %s addr add %s/24 dev veth4", NS_TEST, ADDR_4);
+	SYS(fail, "ip -net %s addr add %s/64 dev veth4 nodad", NS_TEST, ADDR6_4);
+	SYS(fail, "ip -net %s link set dev veth4 up", NS_TEST);
+
+	return 0;
+fail:
+	return -1;
+}
+
+static int endpoint_add(char *addr, char *flags)
+{
+	return SYS_NOFAIL("ip -net %s mptcp endpoint add %s %s", NS_TEST, addr, flags);
+}
+
+static int endpoint_init(char *flags, u8 endpoints)
+{
+	int ret = -1;
+
+	if (!endpoints || endpoints > 4)
+		goto fail;
+
+	if (address_init())
+		goto fail;
+
+	if (SYS_NOFAIL("ip -net %s mptcp limits set add_addr_accepted 4 subflows 4",
+		       NS_TEST)) {
 		printf("'ip mptcp' not supported, skip this test.\n");
 		test__skip();
 		goto fail;
 	}

-	return 0;
+	if (endpoints > 1)
+		ret = endpoint_add(ADDR_2, flags);
+	if (endpoints > 2)
+		ret = ret ?: endpoint_add(ADDR_3, flags);
+	if (endpoints > 3)
+		ret = ret ?: endpoint_add(ADDR_4, flags);
+
 fail:
-	return -1;
+	return ret;
 }

 static void wait_for_new_subflows(int fd)
@@ -423,7 +467,7 @@ static void test_subflow(void)
 	if (!ASSERT_OK_PTR(netns, "netns_new: mptcp_subflow"))
 		goto skel_destroy;

-	if (endpoint_init("subflow") < 0)
+	if (endpoint_init("subflow", 2) < 0)
 		goto close_netns;

 	run_subflow();

-- 
2.45.2