Commit 1ee7efd4 authored by Kaixi Fan's avatar Kaixi Fan Committed by Alexei Starovoitov
Browse files

selftests/bpf: Move vxlan tunnel testcases to test_progs 



Move vxlan tunnel testcases from test_tunnel.sh to test_progs.
And add vxlan tunnel source testcases also. Other tunnel testcases
will be moved to test_progs step by step in the future.
Rename bpf program section name as SEC("tc") because test_progs
bpf loader could not load sections with name SEC("gre_set_tunnel").
Because of this, add bpftool to load bpf programs in test_tunnel.sh.

Signed-off-by: default avatarKaixi Fan <fankaixi.li@bytedance.com>
Link: https://lore.kernel.org/r/20220430074844.69214-3-fankaixi.li@bytedance.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 26101f5a

tools/testing/selftests/bpf/prog_tests/test_tunnel.c

0 → 100644
+423 −0
Original line number Diff line number Diff line 
// 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 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 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 addr add " IP4_ADDR2_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);



	/* 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;

	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 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;

	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");

}

tools/testing/selftests/bpf/progs/test_tunnel_kern.c

+176 −50
Original line number Diff line number Diff line
@@ -40,8 +40,16 @@ struct vxlan_metadata { 
	__u32     gbp;

};



SEC("gre_set_tunnel")

int _gre_set_tunnel(struct __sk_buff *skb)

struct {

	__uint(type, BPF_MAP_TYPE_ARRAY);

	__uint(max_entries, 1);

	__type(key, __u32);

	__type(value, __u32);

} local_ip_map SEC(".maps");





SEC("tc")

int gre_set_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -62,8 +70,8 @@ int _gre_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("gre_get_tunnel")

int _gre_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int gre_get_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -79,8 +87,8 @@ int _gre_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6gretap_set_tunnel")

int _ip6gretap_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6gretap_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key;

	int ret;
@@ -103,8 +111,8 @@ int _ip6gretap_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6gretap_get_tunnel")

int _ip6gretap_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6gretap_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip6 ::%x label %x\n";

	struct bpf_tunnel_key key;
@@ -123,8 +131,8 @@ int _ip6gretap_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("erspan_set_tunnel")

int _erspan_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int erspan_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key;

	struct erspan_metadata md;
@@ -166,8 +174,8 @@ int _erspan_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("erspan_get_tunnel")

int _erspan_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int erspan_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip 0x%x erspan version %d\n";

	struct bpf_tunnel_key key;
@@ -207,8 +215,8 @@ int _erspan_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip4ip6erspan_set_tunnel")

int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip4ip6erspan_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key;

	struct erspan_metadata md;
@@ -251,8 +259,8 @@ int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip4ip6erspan_get_tunnel")

int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip4ip6erspan_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "ip6erspan get key %d remote ip6 ::%x erspan version %d\n";

	struct bpf_tunnel_key key;
@@ -293,14 +301,62 @@ int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("vxlan_set_tunnel")

int _vxlan_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int vxlan_set_tunnel_dst(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;

	struct vxlan_metadata md;

	__u32 index = 0;

	__u32 *local_ip = NULL;



	local_ip = bpf_map_lookup_elem(&local_ip_map, &index);

	if (!local_ip) {

		log_err(ret);

		return TC_ACT_SHOT;

	}



	__builtin_memset(&key, 0x0, sizeof(key));

	key.local_ipv4 = 0xac100164; /* 172.16.1.100 */

	key.remote_ipv4 = *local_ip;

	key.tunnel_id = 2;

	key.tunnel_tos = 0;

	key.tunnel_ttl = 64;



	ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),

				     BPF_F_ZERO_CSUM_TX);

	if (ret < 0) {

		log_err(ret);

		return TC_ACT_SHOT;

	}



	md.gbp = 0x800FF; /* Set VXLAN Group Policy extension */

	ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));

	if (ret < 0) {

		log_err(ret);

		return TC_ACT_SHOT;

	}



	return TC_ACT_OK;

}



SEC("tc")

int vxlan_set_tunnel_src(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;

	struct vxlan_metadata md;

	__u32 index = 0;

	__u32 *local_ip = NULL;



	local_ip = bpf_map_lookup_elem(&local_ip_map, &index);

	if (!local_ip) {

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	__builtin_memset(&key, 0x0, sizeof(key));

	key.local_ipv4 = *local_ip;

	key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */

	key.tunnel_id = 2;

	key.tunnel_tos = 0;
@@ -323,13 +379,22 @@ int _vxlan_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("vxlan_get_tunnel")

int _vxlan_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int vxlan_get_tunnel_src(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;

	struct vxlan_metadata md;

	char fmt[] = "key %d remote ip 0x%x vxlan gbp 0x%x\n";

	char fmt2[] = "local ip 0x%x\n";

	__u32 index = 0;

	__u32 *local_ip = NULL;



	local_ip = bpf_map_lookup_elem(&local_ip_map, &index);

	if (!local_ip) {

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);

	if (ret < 0) {
@@ -343,19 +408,65 @@ int _vxlan_get_tunnel(struct __sk_buff *skb) 
		return TC_ACT_SHOT;

	}



	bpf_trace_printk(fmt, sizeof(fmt),

			key.tunnel_id, key.remote_ipv4, md.gbp);

	if (key.local_ipv4 != *local_ip || md.gbp != 0x800FF) {

		bpf_printk("vxlan key %d local ip 0x%x remote ip 0x%x gbp 0x%x\n",

			   key.tunnel_id, key.local_ipv4,

			   key.remote_ipv4, md.gbp);

		bpf_printk("local_ip 0x%x\n", *local_ip);

		log_err(ret);

		return TC_ACT_SHOT;

	}



	return TC_ACT_OK;

}



SEC("ip6vxlan_set_tunnel")

int _ip6vxlan_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6vxlan_set_tunnel_dst(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key;

	int ret;

	__u32 index = 0;

	__u32 *local_ip;



	local_ip = bpf_map_lookup_elem(&local_ip_map, &index);

	if (!local_ip) {

		log_err(ret);

		return TC_ACT_SHOT;

	}



	__builtin_memset(&key, 0x0, sizeof(key));

	key.local_ipv6[3] = bpf_htonl(0x11); /* ::11 */

	key.remote_ipv6[3] = bpf_htonl(*local_ip);

	key.tunnel_id = 22;

	key.tunnel_tos = 0;

	key.tunnel_ttl = 64;



	ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),

				     BPF_F_TUNINFO_IPV6);

	if (ret < 0) {

		log_err(ret);

		return TC_ACT_SHOT;

	}



	return TC_ACT_OK;

}



SEC("tc")

int ip6vxlan_set_tunnel_src(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key;

	int ret;

	__u32 index = 0;

	__u32 *local_ip;



	local_ip = bpf_map_lookup_elem(&local_ip_map, &index);

	if (!local_ip) {

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	__builtin_memset(&key, 0x0, sizeof(key));

	key.local_ipv6[3] = bpf_htonl(*local_ip);

	key.remote_ipv6[3] = bpf_htonl(0x11); /* ::11 */

	key.tunnel_id = 22;

	key.tunnel_tos = 0;
@@ -371,12 +482,21 @@ int _ip6vxlan_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6vxlan_get_tunnel")

int _ip6vxlan_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6vxlan_get_tunnel_src(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip6 ::%x label %x\n";

	char fmt2[] = "local ip6 ::%x\n";

	struct bpf_tunnel_key key;

	int ret;

	__u32 index = 0;

	__u32 *local_ip;



	local_ip = bpf_map_lookup_elem(&local_ip_map, &index);

	if (!local_ip) {

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),

				     BPF_F_TUNINFO_IPV6);
@@ -385,14 +505,20 @@ int _ip6vxlan_get_tunnel(struct __sk_buff *skb) 
		return TC_ACT_SHOT;

	}



	if (bpf_ntohl(key.local_ipv6[3]) != *local_ip) {

		bpf_trace_printk(fmt, sizeof(fmt),

			 key.tunnel_id, key.remote_ipv6[3], key.tunnel_label);

				 key.tunnel_id,

				 key.remote_ipv6[3], key.tunnel_label);

		bpf_trace_printk(fmt2, sizeof(fmt2), key.local_ipv6[3]);

		ERROR(ret);

		return TC_ACT_SHOT;

	}



	return TC_ACT_OK;

}



SEC("geneve_set_tunnel")

int _geneve_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int geneve_set_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -429,8 +555,8 @@ int _geneve_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("geneve_get_tunnel")

int _geneve_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int geneve_get_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -452,8 +578,8 @@ int _geneve_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6geneve_set_tunnel")

int _ip6geneve_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6geneve_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key;

	struct geneve_opt gopt;
@@ -490,8 +616,8 @@ int _ip6geneve_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6geneve_get_tunnel")

int _ip6geneve_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6geneve_get_tunnel(struct __sk_buff *skb)

{

	char fmt[] = "key %d remote ip 0x%x geneve class 0x%x\n";

	struct bpf_tunnel_key key;
@@ -515,8 +641,8 @@ int _ip6geneve_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ipip_set_tunnel")

int _ipip_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ipip_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key = {};

	void *data = (void *)(long)skb->data;
@@ -544,8 +670,8 @@ int _ipip_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ipip_get_tunnel")

int _ipip_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ipip_get_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -561,8 +687,8 @@ int _ipip_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ipip6_set_tunnel")

int _ipip6_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ipip6_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key = {};

	void *data = (void *)(long)skb->data;
@@ -592,8 +718,8 @@ int _ipip6_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ipip6_get_tunnel")

int _ipip6_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ipip6_get_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -611,8 +737,8 @@ int _ipip6_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6ip6_set_tunnel")

int _ip6ip6_set_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6ip6_set_tunnel(struct __sk_buff *skb)

{

	struct bpf_tunnel_key key = {};

	void *data = (void *)(long)skb->data;
@@ -641,8 +767,8 @@ int _ip6ip6_set_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("ip6ip6_get_tunnel")

int _ip6ip6_get_tunnel(struct __sk_buff *skb)

SEC("tc")

int ip6ip6_get_tunnel(struct __sk_buff *skb)

{

	int ret;

	struct bpf_tunnel_key key;
@@ -660,8 +786,8 @@ int _ip6ip6_get_tunnel(struct __sk_buff *skb) 
	return TC_ACT_OK;

}



SEC("xfrm_get_state")

int _xfrm_get_state(struct __sk_buff *skb)

SEC("tc")

int xfrm_get_state(struct __sk_buff *skb)

{

	struct bpf_xfrm_state x;

	char fmt[] = "reqid %d spi 0x%x remote ip 0x%x\n";

tools/testing/selftests/bpf/test_tunnel.sh

+11 −113

File changed.

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