selftests/landlock: Test that MPTCP actions are not restricted

Extend protocol fixture with test suits for MPTCP protocol.
Add CONFIG_MPTCP and CONFIG_MPTCP_IPV6 options in config.

Signed-off-by: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com>
Link: https://lore.kernel.org/r/20250205093651.1424339-4-ivanov.mikhail1@huawei-partners.com
Cc: <stable@vger.kernel.org> # 6.7.x
Signed-off-by: Mickaël Salaün <mic@digikod.net>

Author: sm1ling-knight

tools/testing/selftests/landlock/config

@@ -4,6 +4,8 @@ CONFIG_CGROUP_SCHED=y
 CONFIG_INET=y
 CONFIG_IPV6=y
 CONFIG_KEYS=y
+CONFIG_MPTCP=y
+CONFIG_MPTCP_IPV6=y
 CONFIG_NET=y
 CONFIG_NET_NS=y
 CONFIG_OVERLAY_FS=y

tools/testing/selftests/landlock/net_test.c

@@ -312,6 +312,17 @@ FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_tcp2) {
 	},
 };
 
+/* clang-format off */
+FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_mptcp) {
+	/* clang-format on */
+	.sandbox = NO_SANDBOX,
+	.prot = {
+		.domain = AF_INET,
+		.type = SOCK_STREAM,
+		.protocol = IPPROTO_MPTCP,
+	},
+};
+
 /* clang-format off */
 FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_tcp1) {
 	/* clang-format on */
@@ -335,6 +346,17 @@ FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_tcp2) {
 	},
 };
 
+/* clang-format off */
+FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv6_mptcp) {
+	/* clang-format on */
+	.sandbox = NO_SANDBOX,
+	.prot = {
+		.domain = AF_INET6,
+		.type = SOCK_STREAM,
+		.protocol = IPPROTO_MPTCP,
+	},
+};
+
 /* clang-format off */
 FIXTURE_VARIANT_ADD(protocol, no_sandbox_with_ipv4_udp) {
 	/* clang-format on */
@@ -398,6 +420,17 @@ FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_tcp2) {
 	},
 };
 
+/* clang-format off */
+FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_mptcp) {
+	/* clang-format on */
+	.sandbox = TCP_SANDBOX,
+	.prot = {
+		.domain = AF_INET,
+		.type = SOCK_STREAM,
+		.protocol = IPPROTO_MPTCP,
+	},
+};
+
 /* clang-format off */
 FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_tcp1) {
 	/* clang-format on */
@@ -421,6 +454,17 @@ FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_tcp2) {
 	},
 };
 
+/* clang-format off */
+FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv6_mptcp) {
+	/* clang-format on */
+	.sandbox = TCP_SANDBOX,
+	.prot = {
+		.domain = AF_INET6,
+		.type = SOCK_STREAM,
+		.protocol = IPPROTO_MPTCP,
+	},
+};
+
 /* clang-format off */
 FIXTURE_VARIANT_ADD(protocol, tcp_sandbox_with_ipv4_udp) {
 	/* clang-format on */