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selftests/bpf: Test XDP bonding nest and unwind

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Modify the test to check that enslaving a bond slave with a XDP program
is now allowed.

Extend attach test to exercise the program unwinding in bond_xdp_set and
add a new test for loading XDP program on doubly nested bond device to
verify that static key incr/decr is correct.

Signed-off-by: Jussi Maki <joamaki@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jussi Maki 2021-09-06 10:56:38 +02:00 committed by David S. Miller
parent 6d5f1ef838
commit 4a9c93dc47
1 changed files with 64 additions and 10 deletions
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74
tools/testing/selftests/bpf/prog_tests/xdp_bonding.c
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@ -384,8 +384,7 @@ static void test_xdp_bonding_attach(struct skeletons *skeletons)
{
struct bpf_link *link = NULL;
struct bpf_link *link2 = NULL;
int veth, bond;
int err;
int veth, bond, err;
if (!ASSERT_OK(system("ip link add veth type veth"), "add veth"))
goto out;
@ -399,22 +398,18 @@ static void test_xdp_bonding_attach(struct skeletons *skeletons)
if (!ASSERT_GE(bond, 0, "if_nametoindex bond"))
goto out;
/* enslaving with a XDP program loaded fails */
/* enslaving with a XDP program loaded is allowed */
link = bpf_program__attach_xdp(skeletons->xdp_dummy->progs.xdp_dummy_prog, veth);
if (!ASSERT_OK_PTR(link, "attach program to veth"))
goto out;
err = system("ip link set veth master bond");
if (!ASSERT_NEQ(err, 0, "attaching slave with xdp program expected to fail"))
if (!ASSERT_OK(err, "set veth master"))
goto out;
bpf_link__destroy(link);
link = NULL;
err = system("ip link set veth master bond");
if (!ASSERT_OK(err, "set veth master"))
goto out;
/* attaching to slave when master has no program is allowed */
link = bpf_program__attach_xdp(skeletons->xdp_dummy->progs.xdp_dummy_prog, veth);
if (!ASSERT_OK_PTR(link, "attach program to slave when enslaved"))
@ -434,8 +429,26 @@ static void test_xdp_bonding_attach(struct skeletons *skeletons)
goto out;
/* attaching to slave not allowed when master has program loaded */
link2 = bpf_program__attach_xdp(skeletons->xdp_dummy->progs.xdp_dummy_prog, bond);
ASSERT_ERR_PTR(link2, "attach program to slave when master has program");
link2 = bpf_program__attach_xdp(skeletons->xdp_dummy->progs.xdp_dummy_prog, veth);
if (!ASSERT_ERR_PTR(link2, "attach program to slave when master has program"))
goto out;
bpf_link__destroy(link);
link = NULL;
/* test program unwinding with a non-XDP slave */
if (!ASSERT_OK(system("ip link add vxlan type vxlan id 1 remote 1.2.3.4 dstport 0 dev lo"),
"add vxlan"))
goto out;
err = system("ip link set vxlan master bond");
if (!ASSERT_OK(err, "set vxlan master"))
goto out;
/* attaching not allowed when one slave does not support XDP */
link = bpf_program__attach_xdp(skeletons->xdp_dummy->progs.xdp_dummy_prog, bond);
if (!ASSERT_ERR_PTR(link, "attach program to master when slave does not support XDP"))
goto out;
out:
bpf_link__destroy(link);
@ -443,6 +456,44 @@ out:
system("ip link del veth");
system("ip link del bond");
system("ip link del vxlan");
}
/* Test with nested bonding devices to catch issue with negative jump label count */
static void test_xdp_bonding_nested(struct skeletons *skeletons)
{
struct bpf_link *link = NULL;
int bond, err;
if (!ASSERT_OK(system("ip link add bond type bond"), "add bond"))
goto out;
bond = if_nametoindex("bond");
if (!ASSERT_GE(bond, 0, "if_nametoindex bond"))
goto out;
if (!ASSERT_OK(system("ip link add bond_nest1 type bond"), "add bond_nest1"))
goto out;
err = system("ip link set bond_nest1 master bond");
if (!ASSERT_OK(err, "set bond_nest1 master"))
goto out;
if (!ASSERT_OK(system("ip link add bond_nest2 type bond"), "add bond_nest1"))
goto out;
err = system("ip link set bond_nest2 master bond_nest1");
if (!ASSERT_OK(err, "set bond_nest2 master"))
goto out;
link = bpf_program__attach_xdp(skeletons->xdp_dummy->progs.xdp_dummy_prog, bond);
ASSERT_OK_PTR(link, "attach program to master");
out:
bpf_link__destroy(link);
system("ip link del bond");
system("ip link del bond_nest1");
system("ip link del bond_nest2");
}
static int libbpf_debug_print(enum libbpf_print_level level,
@ -496,6 +547,9 @@ void test_xdp_bonding(void)
if (test__start_subtest("xdp_bonding_attach"))
test_xdp_bonding_attach(&skeletons);
if (test__start_subtest("xdp_bonding_nested"))
test_xdp_bonding_nested(&skeletons);
for (i = 0; i < ARRAY_SIZE(bond_test_cases); i++) {
struct bond_test_case *test_case = &bond_test_cases[i];