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selftests/bpf: test_tunnel: Move ip6gre tunnel test to test_progs

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ip6gre tunnels are tested in the test_tunnel.sh but not in the test_progs
framework.

Add a new test in test_progs to test ip6gre tunnels. It uses the same
network topology and the same BPF programs than the script. Disable the
IPv6 DAD feature because it can take lot of time and cause some tests to
fail depending on the environment they're run on.
Remove test_ip6gre() and test_ip6gretap() from the script.

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250303-tunnels-v2-4-8329f38f0678@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Bastien Curutchet (eBPF Foundation) 2025-03-03 09:22:52 +01:00 committed by Alexei Starovoitov
parent 257dfd1c6b
commit 856818b28f
2 changed files with 104 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
tools/testing/selftests/bpf/prog_tests/test_tunnel.c
View File

@ -71,6 +71,8 @@
#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_TUNL_DEV0 "fc80::100"
#define IP6_ADDR_TUNL_DEV1 "fc80::200"
#define IP6_ADDR_VETH0 "::11"
#define IP6_ADDR1_VETH1 "::22"
@ -101,6 +103,9 @@
#define GRE_TUNL_DEV0 "gre00"
#define GRE_TUNL_DEV1 "gre11"
#define IP6GRE_TUNL_DEV0 "ip6gre00"
#define IP6GRE_TUNL_DEV1 "ip6gre11"
#define PING_ARGS "-i 0.01 -c 3 -w 10 -q"
static int config_device(void)
@ -396,6 +401,43 @@ static void delete_tunnel(const char *dev0, const char *dev1)
SYS_NOFAIL("ip link delete dev %s", dev1);
}
static int set_ipv6_addr(const char *dev0, const char *dev1)
{
/* disable IPv6 DAD because it might take too long and fail tests */
SYS(fail, "ip -n at_ns0 addr add %s/96 dev veth0 nodad", IP6_ADDR_VETH0);
SYS(fail, "ip -n at_ns0 link set dev veth0 up");
SYS(fail, "ip addr add %s/96 dev veth1 nodad", IP6_ADDR1_VETH1);
SYS(fail, "ip link set dev veth1 up");
SYS(fail, "ip -n at_ns0 addr add dev %s %s/24", dev0, IP4_ADDR_TUNL_DEV0);
SYS(fail, "ip -n at_ns0 addr add dev %s %s/96 nodad", dev0, IP6_ADDR_TUNL_DEV0);
SYS(fail, "ip -n at_ns0 link set dev %s up", dev0);
SYS(fail, "ip addr add dev %s %s/24", dev1, IP4_ADDR_TUNL_DEV1);
SYS(fail, "ip addr add dev %s %s/96 nodad", dev1, IP6_ADDR_TUNL_DEV1);
SYS(fail, "ip link set dev %s up", dev1);
return 0;
fail:
return 1;
}
static int add_ipv6_tunnel(const char *dev0, const char *dev1,
const char *type, const char *opt)
{
if (!type || !opt || !dev0 || !dev1)
return -1;
SYS(fail, "ip -n at_ns0 link add dev %s type %s %s local %s remote %s",
dev0, type, opt, IP6_ADDR_VETH0, IP6_ADDR1_VETH1);
SYS(fail, "ip link add dev %s type %s external", dev1, type);
return set_ipv6_addr(dev0, dev1);
fail:
return -1;
}
static int test_ping(int family, const char *addr)
{
SYS(fail, "%s %s %s > /dev/null", ping_command(family), PING_ARGS, addr);
@ -423,6 +465,24 @@ static void ping_dev1(void)
close_netns(nstoken);
}
static void ping6_veth0(void)
{
test_ping(AF_INET6, IP6_ADDR_VETH0);
}
static void ping6_dev1(void)
{
struct nstoken *nstoken;
/* ping from at_ns0 namespace test */
nstoken = open_netns("at_ns0");
if (!ASSERT_OK_PTR(nstoken, "setns"))
return;
test_ping(AF_INET, IP6_ADDR_TUNL_DEV1);
close_netns(nstoken);
}
static int attach_tc_prog(int ifindex, int igr_fd, int egr_fd)
{
DECLARE_LIBBPF_OPTS(bpf_tc_hook, hook, .ifindex = ifindex,
@ -770,6 +830,48 @@ static void test_gre_tunnel(enum gre_test test)
test_tunnel_kern__destroy(skel);
}
enum ip6gre_test {
IP6GRE,
IP6GRETAP
};
static void test_ip6gre_tunnel(enum ip6gre_test test)
{
struct test_tunnel_kern *skel;
int set_fd, get_fd;
int err;
skel = test_tunnel_kern__open_and_load();
if (!ASSERT_OK_PTR(skel, "test_tunnel_kern__open_and_load"))
return;
switch (test) {
case IP6GRE:
err = add_ipv6_tunnel(IP6GRE_TUNL_DEV0, IP6GRE_TUNL_DEV1,
"ip6gre", "flowlabel 0xbcdef key 2");
break;
case IP6GRETAP:
err = add_ipv6_tunnel(IP6GRE_TUNL_DEV0, IP6GRE_TUNL_DEV1,
"ip6gretap", "flowlabel 0xbcdef key 2");
break;
}
if (!ASSERT_OK(err, "add tunnel"))
goto done;
set_fd = bpf_program__fd(skel->progs.ip6gretap_set_tunnel);
get_fd = bpf_program__fd(skel->progs.ip6gretap_get_tunnel);
if (generic_attach(IP6GRE_TUNL_DEV1, get_fd, set_fd))
goto done;
ping6_veth0();
ping6_dev1();
ping_dev0();
ping_dev1();
done:
delete_tunnel(IP6GRE_TUNL_DEV0, IP6GRE_TUNL_DEV1);
test_tunnel_kern__destroy(skel);
}
#define RUN_TEST(name, ...) \
({ \
if (test__start_subtest(#name)) { \
@ -791,6 +893,8 @@ static void *test_tunnel_run_tests(void *arg)
RUN_TEST(gre_tunnel, GRE_NOKEY);
RUN_TEST(gre_tunnel, GRETAP);
RUN_TEST(gre_tunnel, GRETAP_NOKEY);
RUN_TEST(ip6gre_tunnel, IP6GRE);
RUN_TEST(ip6gre_tunnel, IP6GRETAP);
return NULL;
}

95
tools/testing/selftests/bpf/test_tunnel.sh
View File

@ -64,31 +64,6 @@ config_device()
ip addr add dev veth1 172.16.1.200/24
}
add_ip6gretap_tunnel()
{
# assign ipv6 address
ip netns exec at_ns0 ip addr add ::11/96 dev veth0
ip netns exec at_ns0 ip link set dev veth0 up
ip addr add dev veth1 ::22/96
ip link set dev veth1 up
# at_ns0 namespace
ip netns exec at_ns0 \
ip link add dev $DEV_NS type $TYPE seq flowlabel 0xbcdef key 2 \
local ::11 remote ::22
ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
ip netns exec at_ns0 ip addr add dev $DEV_NS fc80::100/96
ip netns exec at_ns0 ip link set dev $DEV_NS up
# root namespace
ip link add dev $DEV type $TYPE external
ip addr add dev $DEV 10.1.1.200/24
ip addr add dev $DEV fc80::200/24
ip link set dev $DEV up
}
add_erspan_tunnel()
{
# at_ns0 namespace
@ -214,65 +189,6 @@ add_ip6tnl_tunnel()
ip link set dev $DEV up
}
test_ip6gre()
{
TYPE=ip6gre
DEV_NS=ip6gre00
DEV=ip6gre11
ret=0
check $TYPE
config_device
# reuse the ip6gretap function
add_ip6gretap_tunnel
attach_bpf $DEV ip6gretap_set_tunnel ip6gretap_get_tunnel
# underlay
ping6 $PING_ARG ::11
# overlay: ipv4 over ipv6
ip netns exec at_ns0 ping $PING_ARG 10.1.1.200
ping $PING_ARG 10.1.1.100
check_err $?
# overlay: ipv6 over ipv6
ip netns exec at_ns0 ping6 $PING_ARG fc80::200
check_err $?
cleanup
if [ $ret -ne 0 ]; then
echo -e ${RED}"FAIL: $TYPE"${NC}
return 1
fi
echo -e ${GREEN}"PASS: $TYPE"${NC}
}
test_ip6gretap()
{
TYPE=ip6gretap
DEV_NS=ip6gretap00
DEV=ip6gretap11
ret=0
check $TYPE
config_device
add_ip6gretap_tunnel
attach_bpf $DEV ip6gretap_set_tunnel ip6gretap_get_tunnel
# underlay
ping6 $PING_ARG ::11
# overlay: ipv4 over ipv6
ip netns exec at_ns0 ping $PING_ARG 10.1.1.200
ping $PING_ARG 10.1.1.100
check_err $?
# overlay: ipv6 over ipv6
ip netns exec at_ns0 ping6 $PING_ARG fc80::200
check_err $?
cleanup
if [ $ret -ne 0 ]; then
echo -e ${RED}"FAIL: $TYPE"${NC}
return 1
fi
echo -e ${GREEN}"PASS: $TYPE"${NC}
}
test_erspan()
{
TYPE=erspan
@ -470,8 +386,6 @@ cleanup()
ip link del ipip11 2> /dev/null
ip link del ipip6tnl11 2> /dev/null
ip link del ip6ip6tnl11 2> /dev/null
ip link del ip6gre11 2> /dev/null
ip link del ip6gretap11 2> /dev/null
ip link del geneve11 2> /dev/null
ip link del ip6geneve11 2> /dev/null
ip link del erspan11 2> /dev/null
@ -497,7 +411,6 @@ check()
enable_debug()
{
echo 'file ip6_gre.c +p' > /sys/kernel/debug/dynamic_debug/control
echo 'file geneve.c +p' > /sys/kernel/debug/dynamic_debug/control
echo 'file ipip.c +p' > /sys/kernel/debug/dynamic_debug/control
}
@ -513,14 +426,6 @@ bpf_tunnel_test()
{
local errors=0
echo "Testing IP6GRE tunnel..."
test_ip6gre
errors=$(( $errors + $? ))
echo "Testing IP6GRETAP tunnel..."
test_ip6gretap
errors=$(( $errors + $? ))
echo "Testing ERSPAN tunnel..."
test_erspan v2
errors=$(( $errors + $? ))