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selftests/bpf: Improve recursion selftest

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Since recursion_misses counter is available in bpf_prog_info
improve the selftest to make sure it's counting correctly.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210210033634.62081-8-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov
2021-02-09 19:36:32 -08:00
committed by Daniel Borkmann
parent 9ed9e9ba23
commit dcf33b6f4d
1 changed files with 8 additions and 0 deletions
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8
tools/testing/selftests/bpf/prog_tests/recursion.c
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@@ -5,6 +5,8 @@
void test_recursion(void) void test_recursion(void)
{ {
struct bpf_prog_info prog_info = {};
__u32 prog_info_len = sizeof(prog_info);
struct recursion *skel; struct recursion *skel;
int key = 0; int key = 0;
int err; int err;
@@ -28,6 +30,12 @@ void test_recursion(void)
ASSERT_EQ(skel->bss->pass2, 1, "pass2 == 1"); ASSERT_EQ(skel->bss->pass2, 1, "pass2 == 1");
bpf_map_lookup_elem(bpf_map__fd(skel->maps.hash2), &key, 0); bpf_map_lookup_elem(bpf_map__fd(skel->maps.hash2), &key, 0);
ASSERT_EQ(skel->bss->pass2, 2, "pass2 == 2"); ASSERT_EQ(skel->bss->pass2, 2, "pass2 == 2");
err = bpf_obj_get_info_by_fd(bpf_program__fd(skel->progs.on_lookup),
&prog_info, &prog_info_len);
if (!ASSERT_OK(err, "get_prog_info"))
goto out;
ASSERT_EQ(prog_info.recursion_misses, 2, "recursion_misses");
out: out:
recursion__destroy(skel); recursion__destroy(skel);
} }