From: Feng Yang <yangfeng59949@163.com>
To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org,
yonghong.song@linux.dev, john.fastabend@gmail.com,
kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com,
jolsa@kernel.org, hengqi.chen@gmail.com, olsajiri@gmail.com
Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 bpf-next 3/3] selftests/bpf: Add test for attaching kprobe with long event names
Date: Thu, 17 Apr 2025 09:48:48 +0800 [thread overview]
Message-ID: <20250417014848.59321-4-yangfeng59949@163.com> (raw)
In-Reply-To: <20250417014848.59321-1-yangfeng59949@163.com>
From: Feng Yang <yangfeng@kylinos.cn>
This test verifies that attaching kprobe/kretprobe with long event names
does not trigger EINVAL errors.
Signed-off-by: Feng Yang <yangfeng@kylinos.cn>
---
.../selftests/bpf/prog_tests/attach_probe.c | 35 +++++++++++++++++++
.../selftests/bpf/test_kmods/bpf_testmod.c | 4 +++
2 files changed, 39 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/attach_probe.c b/tools/testing/selftests/bpf/prog_tests/attach_probe.c
index 9b7f36f39c32..cabc51c2ca6b 100644
--- a/tools/testing/selftests/bpf/prog_tests/attach_probe.c
+++ b/tools/testing/selftests/bpf/prog_tests/attach_probe.c
@@ -168,6 +168,39 @@ static void test_attach_uprobe_long_event_name(void)
test_attach_probe_manual__destroy(skel);
}
+/* attach kprobe/kretprobe long event name testings */
+static void test_attach_kprobe_long_event_name(void)
+{
+ DECLARE_LIBBPF_OPTS(bpf_kprobe_opts, kprobe_opts);
+ struct bpf_link *kprobe_link, *kretprobe_link;
+ struct test_attach_probe_manual *skel;
+
+ skel = test_attach_probe_manual__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "skel_kprobe_manual_open_and_load"))
+ return;
+
+ /* manual-attach kprobe/kretprobe */
+ kprobe_opts.attach_mode = PROBE_ATTACH_MODE_LEGACY;
+ kprobe_opts.retprobe = false;
+ kprobe_link = bpf_program__attach_kprobe_opts(skel->progs.handle_kprobe,
+ "bpf_testmod_looooooooooooooooooooooooooooooong_name",
+ &kprobe_opts);
+ if (!ASSERT_OK_PTR(kprobe_link, "attach_kprobe_long_event_name"))
+ goto cleanup;
+ skel->links.handle_kprobe = kprobe_link;
+
+ kprobe_opts.retprobe = true;
+ kretprobe_link = bpf_program__attach_kprobe_opts(skel->progs.handle_kretprobe,
+ "bpf_testmod_looooooooooooooooooooooooooooooong_name",
+ &kprobe_opts);
+ if (!ASSERT_OK_PTR(kretprobe_link, "attach_kretprobe_long_event_name"))
+ goto cleanup;
+ skel->links.handle_kretprobe = kretprobe_link;
+
+cleanup:
+ test_attach_probe_manual__destroy(skel);
+}
+
static void test_attach_probe_auto(struct test_attach_probe *skel)
{
struct bpf_link *uprobe_err_link;
@@ -371,6 +404,8 @@ void test_attach_probe(void)
if (test__start_subtest("uprobe-long_name"))
test_attach_uprobe_long_event_name();
+ if (test__start_subtest("kprobe-long_name"))
+ test_attach_kprobe_long_event_name();
cleanup:
test_attach_probe__destroy(skel);
diff --git a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
index f38eaf0d35ef..2e54b95ad898 100644
--- a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c
@@ -134,6 +134,10 @@ bpf_testmod_test_arg_ptr_to_struct(struct bpf_testmod_struct_arg_1 *a) {
return bpf_testmod_test_struct_arg_result;
}
+__weak noinline void bpf_testmod_looooooooooooooooooooooooooooooong_name(void)
+{
+}
+
__bpf_kfunc void
bpf_testmod_test_mod_kfunc(int i)
{
--
2.43.0
next prev parent reply other threads:[~2025-04-17 1:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-17 1:48 [PATCH v5 bpf-next 0/3] libbpf: Fix event name too long error and add tests Feng Yang
2025-04-17 1:48 ` [PATCH v5 bpf-next 1/3] libbpf: Fix event name too long error Feng Yang
2025-04-17 1:48 ` [PATCH v5 bpf-next 2/3] selftests/bpf: Add test for attaching uprobe with long event names Feng Yang
2025-04-17 1:48 ` Feng Yang [this message]
2025-04-17 11:16 ` [PATCH v5 bpf-next 0/3] libbpf: Fix event name too long error and add tests Jiri Olsa
2025-04-23 0:20 ` patchwork-bot+netdevbpf
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