From 56dda5a48f4f610ac9a0487c6fb64d31950e4a3e Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Wed, 14 Apr 2021 21:51:43 +0200 Subject: selftests/bpf: Add re-attach test to fentry_test Adding the test to re-attach (detach/attach again) tracing fentry programs, plus check that already linked program can't be attached again. Signed-off-by: Jiri Olsa Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210414195147.1624932-4-jolsa@kernel.org --- .../testing/selftests/bpf/prog_tests/fentry_test.c | 52 +++++++++++++++------- 1 file changed, 37 insertions(+), 15 deletions(-) (limited to 'tools') diff --git a/tools/testing/selftests/bpf/prog_tests/fentry_test.c b/tools/testing/selftests/bpf/prog_tests/fentry_test.c index 04ebbf1cb390..7cb111b11995 100644 --- a/tools/testing/selftests/bpf/prog_tests/fentry_test.c +++ b/tools/testing/selftests/bpf/prog_tests/fentry_test.c @@ -3,35 +3,57 @@ #include #include "fentry_test.skel.h" -void test_fentry_test(void) +static int fentry_test(struct fentry_test *fentry_skel) { - struct fentry_test *fentry_skel = NULL; int err, prog_fd, i; __u32 duration = 0, retval; + struct bpf_link *link; __u64 *result; - fentry_skel = fentry_test__open_and_load(); - if (CHECK(!fentry_skel, "fentry_skel_load", "fentry skeleton failed\n")) - goto cleanup; - err = fentry_test__attach(fentry_skel); - if (CHECK(err, "fentry_attach", "fentry attach failed: %d\n", err)) - goto cleanup; + if (!ASSERT_OK(err, "fentry_attach")) + return err; + + /* Check that already linked program can't be attached again. */ + link = bpf_program__attach(fentry_skel->progs.test1); + if (!ASSERT_ERR_PTR(link, "fentry_attach_link")) + return -1; prog_fd = bpf_program__fd(fentry_skel->progs.test1); err = bpf_prog_test_run(prog_fd, 1, NULL, 0, NULL, NULL, &retval, &duration); - CHECK(err || retval, "test_run", - "err %d errno %d retval %d duration %d\n", - err, errno, retval, duration); + ASSERT_OK(err, "test_run"); + ASSERT_EQ(retval, 0, "test_run"); result = (__u64 *)fentry_skel->bss; - for (i = 0; i < 6; i++) { - if (CHECK(result[i] != 1, "result", - "fentry_test%d failed err %lld\n", i + 1, result[i])) - goto cleanup; + for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) { + if (!ASSERT_EQ(result[i], 1, "fentry_result")) + return -1; } + fentry_test__detach(fentry_skel); + + /* zero results for re-attach test */ + memset(fentry_skel->bss, 0, sizeof(*fentry_skel->bss)); + return 0; +} + +void test_fentry_test(void) +{ + struct fentry_test *fentry_skel = NULL; + int err; + + fentry_skel = fentry_test__open_and_load(); + if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load")) + goto cleanup; + + err = fentry_test(fentry_skel); + if (!ASSERT_OK(err, "fentry_first_attach")) + goto cleanup; + + err = fentry_test(fentry_skel); + ASSERT_OK(err, "fentry_second_attach"); + cleanup: fentry_test__destroy(fentry_skel); } -- cgit v1.2.3