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| author | Qais Yousef <qais.yousef@arm.com> | 2021-01-19 12:22:37 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-01-20 14:14:05 -0800 |
| commit | 407be92206d54517765e028c8b79032eb8f8ac86 (patch) | |
| tree | 55a14edc1e68c6e2109cc0872a52b12094d75abd /tools/testing/selftests/bpf/prog_tests/module_attach.c | |
| parent | 6939f4ef16d48f2093f337162cfc041d0e30ed25 (diff) | |
| download | lwn-407be92206d54517765e028c8b79032eb8f8ac86.tar.gz lwn-407be92206d54517765e028c8b79032eb8f8ac86.zip | |
selftests: bpf: Add a new test for bare tracepoints
Reuse module_attach infrastructure to add a new bare tracepoint to check
we can attach to it as a raw tracepoint.
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210119122237.2426878-3-qais.yousef@arm.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/module_attach.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/module_attach.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/module_attach.c b/tools/testing/selftests/bpf/prog_tests/module_attach.c index 50796b651f72..5bc53d53d86e 100644 --- a/tools/testing/selftests/bpf/prog_tests/module_attach.c +++ b/tools/testing/selftests/bpf/prog_tests/module_attach.c @@ -21,9 +21,34 @@ static int trigger_module_test_read(int read_sz) return 0; } +static int trigger_module_test_write(int write_sz) +{ + int fd, err; + char *buf = malloc(write_sz); + + if (!buf) + return -ENOMEM; + + memset(buf, 'a', write_sz); + buf[write_sz-1] = '\0'; + + fd = open("/sys/kernel/bpf_testmod", O_WRONLY); + err = -errno; + if (CHECK(fd < 0, "testmod_file_open", "failed: %d\n", err)) { + free(buf); + return err; + } + + write(fd, buf, write_sz); + close(fd); + free(buf); + return 0; +} + void test_module_attach(void) { const int READ_SZ = 456; + const int WRITE_SZ = 457; struct test_module_attach* skel; struct test_module_attach__bss *bss; int err; @@ -48,8 +73,10 @@ void test_module_attach(void) /* trigger tracepoint */ ASSERT_OK(trigger_module_test_read(READ_SZ), "trigger_read"); + ASSERT_OK(trigger_module_test_write(WRITE_SZ), "trigger_write"); ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); + ASSERT_EQ(bss->raw_tp_bare_write_sz, WRITE_SZ, "raw_tp_bare"); ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); ASSERT_EQ(bss->fentry_manual_read_sz, READ_SZ, "fentry_manual"); |