Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 436 insertions, 0 deletions

diff --git a/tools/testing/selftests/bpf/prog_tests/test_tunnel.c b/tools/testing/selftests/bpf/prog_tests/test_tunnel.c
new file mode 100644
index 000000000..eea274110
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/test_tunnel.c
@@ -0,0 +1,436 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+
+/*
+ * End-to-end eBPF tunnel test suite
+ *   The file tests BPF network tunnel implementation.
+ *
+ * Topology:
+ * ---------
+ *     root namespace   |     at_ns0 namespace
+ *                       |
+ *       -----------     |     -----------
+ *       | tnl dev |     |     | tnl dev |  (overlay network)
+ *       -----------     |     -----------
+ *       metadata-mode   |     metadata-mode
+ *        with bpf       |       with bpf
+ *                       |
+ *       ----------      |     ----------
+ *       |  veth1  | --------- |  veth0  |  (underlay network)
+ *       ----------    peer    ----------
+ *
+ *
+ *  Device Configuration
+ *  --------------------
+ *  root namespace with metadata-mode tunnel + BPF
+ *  Device names and addresses:
+ *	veth1 IP 1: 172.16.1.200, IPv6: 00::22 (underlay)
+ *		IP 2: 172.16.1.20, IPv6: 00::bb (underlay)
+ *	tunnel dev <type>11, ex: gre11, IPv4: 10.1.1.200, IPv6: 1::22 (overlay)
+ *
+ *  Namespace at_ns0 with native tunnel
+ *  Device names and addresses:
+ *	veth0 IPv4: 172.16.1.100, IPv6: 00::11 (underlay)
+ *	tunnel dev <type>00, ex: gre00, IPv4: 10.1.1.100, IPv6: 1::11 (overlay)
+ *
+ *
+ * End-to-end ping packet flow
+ *  ---------------------------
+ *  Most of the tests start by namespace creation, device configuration,
+ *  then ping the underlay and overlay network.  When doing 'ping 10.1.1.100'
+ *  from root namespace, the following operations happen:
+ *  1) Route lookup shows 10.1.1.100/24 belongs to tnl dev, fwd to tnl dev.
+ *  2) Tnl device's egress BPF program is triggered and set the tunnel metadata,
+ *     with local_ip=172.16.1.200, remote_ip=172.16.1.100. BPF program choose
+ *     the primary or secondary ip of veth1 as the local ip of tunnel. The
+ *     choice is made based on the value of bpf map local_ip_map.
+ *  3) Outer tunnel header is prepended and route the packet to veth1's egress.
+ *  4) veth0's ingress queue receive the tunneled packet at namespace at_ns0.
+ *  5) Tunnel protocol handler, ex: vxlan_rcv, decap the packet.
+ *  6) Forward the packet to the overlay tnl dev.
+ */
+
+#include <arpa/inet.h>
+#include <linux/if_tun.h>
+#include <linux/limits.h>
+#include <linux/sysctl.h>
+#include <linux/time_types.h>
+#include <linux/net_tstamp.h>
+#include <net/if.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "test_progs.h"
+#include "network_helpers.h"
+#include "test_tunnel_kern.skel.h"
+
+#define IP4_ADDR_VETH0 "172.16.1.100"
+#define IP4_ADDR1_VETH1 "172.16.1.200"
+#define IP4_ADDR2_VETH1 "172.16.1.20"
+#define IP4_ADDR_TUNL_DEV0 "10.1.1.100"
+#define IP4_ADDR_TUNL_DEV1 "10.1.1.200"
+
+#define IP6_ADDR_VETH0 "::11"
+#define IP6_ADDR1_VETH1 "::22"
+#define IP6_ADDR2_VETH1 "::bb"
+
+#define IP4_ADDR1_HEX_VETH1 0xac1001c8
+#define IP4_ADDR2_HEX_VETH1 0xac100114
+#define IP6_ADDR1_HEX_VETH1 0x22
+#define IP6_ADDR2_HEX_VETH1 0xbb
+
+#define MAC_TUNL_DEV0 "52:54:00:d9:01:00"
+#define MAC_TUNL_DEV1 "52:54:00:d9:02:00"
+#define MAC_VETH1 "52:54:00:d9:03:00"
+
+#define VXLAN_TUNL_DEV0 "vxlan00"
+#define VXLAN_TUNL_DEV1 "vxlan11"
+#define IP6VXLAN_TUNL_DEV0 "ip6vxlan00"
+#define IP6VXLAN_TUNL_DEV1 "ip6vxlan11"
+
+#define PING_ARGS "-i 0.01 -c 3 -w 10 -q"
+
+#define SYS(fmt, ...)						\
+	({							\
+		char cmd[1024];					\
+		snprintf(cmd, sizeof(cmd), fmt, ##__VA_ARGS__);	\
+		if (!ASSERT_OK(system(cmd), cmd))		\
+			goto fail;				\
+	})
+
+#define SYS_NOFAIL(fmt, ...)					\
+	({							\
+		char cmd[1024];					\
+		snprintf(cmd, sizeof(cmd), fmt, ##__VA_ARGS__);	\
+		system(cmd);					\
+	})
+
+static int config_device(void)
+{
+	SYS("ip netns add at_ns0");
+	SYS("ip link add veth0 address " MAC_VETH1 " type veth peer name veth1");
+	SYS("ip link set veth0 netns at_ns0");
+	SYS("ip addr add " IP4_ADDR1_VETH1 "/24 dev veth1");
+	SYS("ip link set dev veth1 up mtu 1500");
+	SYS("ip netns exec at_ns0 ip addr add " IP4_ADDR_VETH0 "/24 dev veth0");
+	SYS("ip netns exec at_ns0 ip link set dev veth0 up mtu 1500");
+
+	return 0;
+fail:
+	return -1;
+}
+
+static void cleanup(void)
+{
+	SYS_NOFAIL("test -f /var/run/netns/at_ns0 && ip netns delete at_ns0");
+	SYS_NOFAIL("ip link del veth1 2> /dev/null");
+	SYS_NOFAIL("ip link del %s 2> /dev/null", VXLAN_TUNL_DEV1);
+	SYS_NOFAIL("ip link del %s 2> /dev/null", IP6VXLAN_TUNL_DEV1);
+}
+
+static int add_vxlan_tunnel(void)
+{
+	/* at_ns0 namespace */
+	SYS("ip netns exec at_ns0 ip link add dev %s type vxlan external gbp dstport 4789",
+	    VXLAN_TUNL_DEV0);
+	SYS("ip netns exec at_ns0 ip link set dev %s address %s up",
+	    VXLAN_TUNL_DEV0, MAC_TUNL_DEV0);
+	SYS("ip netns exec at_ns0 ip addr add dev %s %s/24",
+	    VXLAN_TUNL_DEV0, IP4_ADDR_TUNL_DEV0);
+	SYS("ip netns exec at_ns0 ip neigh add %s lladdr %s dev %s",
+	    IP4_ADDR_TUNL_DEV1, MAC_TUNL_DEV1, VXLAN_TUNL_DEV0);
+	SYS("ip netns exec at_ns0 ip neigh add %s lladdr %s dev veth0",
+	    IP4_ADDR2_VETH1, MAC_VETH1);
+
+	/* root namespace */
+	SYS("ip link add dev %s type vxlan external gbp dstport 4789",
+	    VXLAN_TUNL_DEV1);
+	SYS("ip link set dev %s address %s up", VXLAN_TUNL_DEV1, MAC_TUNL_DEV1);
+	SYS("ip addr add dev %s %s/24", VXLAN_TUNL_DEV1, IP4_ADDR_TUNL_DEV1);
+	SYS("ip neigh add %s lladdr %s dev %s",
+	    IP4_ADDR_TUNL_DEV0, MAC_TUNL_DEV0, VXLAN_TUNL_DEV1);
+
+	return 0;
+fail:
+	return -1;
+}
+
+static void delete_vxlan_tunnel(void)
+{
+	SYS_NOFAIL("ip netns exec at_ns0 ip link delete dev %s",
+		   VXLAN_TUNL_DEV0);
+	SYS_NOFAIL("ip link delete dev %s", VXLAN_TUNL_DEV1);
+}
+
+static int add_ip6vxlan_tunnel(void)
+{
+	SYS("ip netns exec at_ns0 ip -6 addr add %s/96 dev veth0",
+	    IP6_ADDR_VETH0);
+	SYS("ip netns exec at_ns0 ip link set dev veth0 up");
+	SYS("ip -6 addr add %s/96 dev veth1", IP6_ADDR1_VETH1);
+	SYS("ip -6 addr add %s/96 dev veth1", IP6_ADDR2_VETH1);
+	SYS("ip link set dev veth1 up");
+
+	/* at_ns0 namespace */
+	SYS("ip netns exec at_ns0 ip link add dev %s type vxlan external dstport 4789",
+	    IP6VXLAN_TUNL_DEV0);
+	SYS("ip netns exec at_ns0 ip addr add dev %s %s/24",
+	    IP6VXLAN_TUNL_DEV0, IP4_ADDR_TUNL_DEV0);
+	SYS("ip netns exec at_ns0 ip link set dev %s address %s up",
+	    IP6VXLAN_TUNL_DEV0, MAC_TUNL_DEV0);
+
+	/* root namespace */
+	SYS("ip link add dev %s type vxlan external dstport 4789",
+	    IP6VXLAN_TUNL_DEV1);
+	SYS("ip addr add dev %s %s/24", IP6VXLAN_TUNL_DEV1, IP4_ADDR_TUNL_DEV1);
+	SYS("ip link set dev %s address %s up",
+	    IP6VXLAN_TUNL_DEV1, MAC_TUNL_DEV1);
+
+	return 0;
+fail:
+	return -1;
+}
+
+static void delete_ip6vxlan_tunnel(void)
+{
+	SYS_NOFAIL("ip netns exec at_ns0 ip -6 addr delete %s/96 dev veth0",
+		   IP6_ADDR_VETH0);
+	SYS_NOFAIL("ip -6 addr delete %s/96 dev veth1", IP6_ADDR1_VETH1);
+	SYS_NOFAIL("ip -6 addr delete %s/96 dev veth1", IP6_ADDR2_VETH1);
+	SYS_NOFAIL("ip netns exec at_ns0 ip link delete dev %s",
+		   IP6VXLAN_TUNL_DEV0);
+	SYS_NOFAIL("ip link delete dev %s", IP6VXLAN_TUNL_DEV1);
+}
+
+static int test_ping(int family, const char *addr)
+{
+	SYS("%s %s %s > /dev/null", ping_command(family), PING_ARGS, addr);
+	return 0;
+fail:
+	return -1;
+}
+
+static int attach_tc_prog(struct bpf_tc_hook *hook, int igr_fd, int egr_fd)
+{
+	DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts1, .handle = 1,
+			    .priority = 1, .prog_fd = igr_fd);
+	DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts2, .handle = 1,
+			    .priority = 1, .prog_fd = egr_fd);
+	int ret;
+
+	ret = bpf_tc_hook_create(hook);
+	if (!ASSERT_OK(ret, "create tc hook"))
+		return ret;
+
+	if (igr_fd >= 0) {
+		hook->attach_point = BPF_TC_INGRESS;
+		ret = bpf_tc_attach(hook, &opts1);
+		if (!ASSERT_OK(ret, "bpf_tc_attach")) {
+			bpf_tc_hook_destroy(hook);
+			return ret;
+		}
+	}
+
+	if (egr_fd >= 0) {
+		hook->attach_point = BPF_TC_EGRESS;
+		ret = bpf_tc_attach(hook, &opts2);
+		if (!ASSERT_OK(ret, "bpf_tc_attach")) {
+			bpf_tc_hook_destroy(hook);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static void test_vxlan_tunnel(void)
+{
+	struct test_tunnel_kern *skel = NULL;
+	struct nstoken *nstoken;
+	int local_ip_map_fd = -1;
+	int set_src_prog_fd, get_src_prog_fd;
+	int set_dst_prog_fd;
+	int key = 0, ifindex = -1;
+	uint local_ip;
+	int err;
+	DECLARE_LIBBPF_OPTS(bpf_tc_hook, tc_hook,
+			    .attach_point = BPF_TC_INGRESS);
+
+	/* add vxlan tunnel */
+	err = add_vxlan_tunnel();
+	if (!ASSERT_OK(err, "add vxlan tunnel"))
+		goto done;
+
+	/* load and attach bpf prog to tunnel dev tc hook point */
+	skel = test_tunnel_kern__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "test_tunnel_kern__open_and_load"))
+		goto done;
+	ifindex = if_nametoindex(VXLAN_TUNL_DEV1);
+	if (!ASSERT_NEQ(ifindex, 0, "vxlan11 ifindex"))
+		goto done;
+	tc_hook.ifindex = ifindex;
+	get_src_prog_fd = bpf_program__fd(skel->progs.vxlan_get_tunnel_src);
+	set_src_prog_fd = bpf_program__fd(skel->progs.vxlan_set_tunnel_src);
+	if (!ASSERT_GE(get_src_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (!ASSERT_GE(set_src_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (attach_tc_prog(&tc_hook, get_src_prog_fd, set_src_prog_fd))
+		goto done;
+
+	/* load and attach bpf prog to veth dev tc hook point */
+	ifindex = if_nametoindex("veth1");
+	if (!ASSERT_NEQ(ifindex, 0, "veth1 ifindex"))
+		goto done;
+	tc_hook.ifindex = ifindex;
+	set_dst_prog_fd = bpf_program__fd(skel->progs.veth_set_outer_dst);
+	if (!ASSERT_GE(set_dst_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (attach_tc_prog(&tc_hook, set_dst_prog_fd, -1))
+		goto done;
+
+	/* load and attach prog set_md to tunnel dev tc hook point at_ns0 */
+	nstoken = open_netns("at_ns0");
+	if (!ASSERT_OK_PTR(nstoken, "setns src"))
+		goto done;
+	ifindex = if_nametoindex(VXLAN_TUNL_DEV0);
+	if (!ASSERT_NEQ(ifindex, 0, "vxlan00 ifindex"))
+		goto done;
+	tc_hook.ifindex = ifindex;
+	set_dst_prog_fd = bpf_program__fd(skel->progs.vxlan_set_tunnel_dst);
+	if (!ASSERT_GE(set_dst_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (attach_tc_prog(&tc_hook, -1, set_dst_prog_fd))
+		goto done;
+	close_netns(nstoken);
+
+	/* use veth1 ip 2 as tunnel source ip */
+	local_ip_map_fd = bpf_map__fd(skel->maps.local_ip_map);
+	if (!ASSERT_GE(local_ip_map_fd, 0, "bpf_map__fd"))
+		goto done;
+	local_ip = IP4_ADDR2_HEX_VETH1;
+	err = bpf_map_update_elem(local_ip_map_fd, &key, &local_ip, BPF_ANY);
+	if (!ASSERT_OK(err, "update bpf local_ip_map"))
+		goto done;
+
+	/* ping test */
+	err = test_ping(AF_INET, IP4_ADDR_TUNL_DEV0);
+	if (!ASSERT_OK(err, "test_ping"))
+		goto done;
+
+done:
+	/* delete vxlan tunnel */
+	delete_vxlan_tunnel();
+	if (local_ip_map_fd >= 0)
+		close(local_ip_map_fd);
+	if (skel)
+		test_tunnel_kern__destroy(skel);
+}
+
+static void test_ip6vxlan_tunnel(void)
+{
+	struct test_tunnel_kern *skel = NULL;
+	struct nstoken *nstoken;
+	int local_ip_map_fd = -1;
+	int set_src_prog_fd, get_src_prog_fd;
+	int set_dst_prog_fd;
+	int key = 0, ifindex = -1;
+	uint local_ip;
+	int err;
+	DECLARE_LIBBPF_OPTS(bpf_tc_hook, tc_hook,
+			    .attach_point = BPF_TC_INGRESS);
+
+	/* add vxlan tunnel */
+	err = add_ip6vxlan_tunnel();
+	if (!ASSERT_OK(err, "add_ip6vxlan_tunnel"))
+		goto done;
+
+	/* load and attach bpf prog to tunnel dev tc hook point */
+	skel = test_tunnel_kern__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "test_tunnel_kern__open_and_load"))
+		goto done;
+	ifindex = if_nametoindex(IP6VXLAN_TUNL_DEV1);
+	if (!ASSERT_NEQ(ifindex, 0, "ip6vxlan11 ifindex"))
+		goto done;
+	tc_hook.ifindex = ifindex;
+	get_src_prog_fd = bpf_program__fd(skel->progs.ip6vxlan_get_tunnel_src);
+	set_src_prog_fd = bpf_program__fd(skel->progs.ip6vxlan_set_tunnel_src);
+	if (!ASSERT_GE(set_src_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (!ASSERT_GE(get_src_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (attach_tc_prog(&tc_hook, get_src_prog_fd, set_src_prog_fd))
+		goto done;
+
+	/* load and attach prog set_md to tunnel dev tc hook point at_ns0 */
+	nstoken = open_netns("at_ns0");
+	if (!ASSERT_OK_PTR(nstoken, "setns src"))
+		goto done;
+	ifindex = if_nametoindex(IP6VXLAN_TUNL_DEV0);
+	if (!ASSERT_NEQ(ifindex, 0, "ip6vxlan00 ifindex"))
+		goto done;
+	tc_hook.ifindex = ifindex;
+	set_dst_prog_fd = bpf_program__fd(skel->progs.ip6vxlan_set_tunnel_dst);
+	if (!ASSERT_GE(set_dst_prog_fd, 0, "bpf_program__fd"))
+		goto done;
+	if (attach_tc_prog(&tc_hook, -1, set_dst_prog_fd))
+		goto done;
+	close_netns(nstoken);
+
+	/* use veth1 ip 2 as tunnel source ip */
+	local_ip_map_fd = bpf_map__fd(skel->maps.local_ip_map);
+	if (!ASSERT_GE(local_ip_map_fd, 0, "get local_ip_map fd"))
+		goto done;
+	local_ip = IP6_ADDR2_HEX_VETH1;
+	err = bpf_map_update_elem(local_ip_map_fd, &key, &local_ip, BPF_ANY);
+	if (!ASSERT_OK(err, "update bpf local_ip_map"))
+		goto done;
+
+	/* ping test */
+	err = test_ping(AF_INET, IP4_ADDR_TUNL_DEV0);
+	if (!ASSERT_OK(err, "test_ping"))
+		goto done;
+
+done:
+	/* delete ipv6 vxlan tunnel */
+	delete_ip6vxlan_tunnel();
+	if (local_ip_map_fd >= 0)
+		close(local_ip_map_fd);
+	if (skel)
+		test_tunnel_kern__destroy(skel);
+}
+
+#define RUN_TEST(name)							\
+	({								\
+		if (test__start_subtest(#name)) {			\
+			test_ ## name();				\
+		}							\
+	})
+
+static void *test_tunnel_run_tests(void *arg)
+{
+	cleanup();
+	config_device();
+
+	RUN_TEST(vxlan_tunnel);
+	RUN_TEST(ip6vxlan_tunnel);
+
+	cleanup();
+
+	return NULL;
+}
+
+void serial_test_tunnel(void)
+{
+	pthread_t test_thread;
+	int err;
+
+	/* Run the tests in their own thread to isolate the namespace changes
+	 * so they do not affect the environment of other tests.
+	 * (specifically needed because of unshare(CLONE_NEWNS) in open_netns())
+	 */
+	err = pthread_create(&test_thread, NULL, &test_tunnel_run_tests, NULL);
+	if (ASSERT_OK(err, "pthread_create"))
+		ASSERT_OK(pthread_join(test_thread, NULL), "pthread_join");
+}