On 11/3/24 9:01 PM, Zhu Yanjun wrote:
在 2024/10/24 4:42, D. Wythe 写道:
From: "D. Wythe" <alibuda@xxxxxxxxxxxxxxxxx>
This PATCH adds a tiny selftest for bpf_smc_ops, to verify the ability
to attach and write access.
Follow the steps below to run this test.
make -C tools/testing/selftests/bpf
cd tools/testing/selftests/bpf
sudo ./test_progs -t smc
Thanks a lot.
# ./test_progs -t smc
#27/1 bpf_smc/load:OK
#27 bpf_smc:OK
Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
The above command is based on several kernel modules. After these dependent kernel modules are
loaded, then can run the above command successfully.
Zhu Yanjun
Hi, Yanjun
This is indeed a problem, a better way may be to create a separate testing directory for SMC, and we
are trying to do this.
Best wishes,
D. Wythe
Results shows:
Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: D. Wythe <alibuda@xxxxxxxxxxxxxxxxx>
---
.../selftests/bpf/prog_tests/test_bpf_smc.c | 21 +++++++++++
tools/testing/selftests/bpf/progs/bpf_smc.c | 44 ++++++++++++++++++++++
2 files changed, 65 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/test_bpf_smc.c
create mode 100644 tools/testing/selftests/bpf/progs/bpf_smc.c
diff --git a/tools/testing/selftests/bpf/prog_tests/test_bpf_smc.c
b/tools/testing/selftests/bpf/prog_tests/test_bpf_smc.c
new file mode 100644
index 00000000..2299853
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/test_bpf_smc.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+#include "bpf_smc.skel.h"
+
+static void load(void)
+{
+ struct bpf_smc *skel;
+
+ skel = bpf_smc__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "bpf_smc__open_and_load"))
+ return;
+
+ bpf_smc__destroy(skel);
+}
+
+void test_bpf_smc(void)
+{
+ if (test__start_subtest("load"))
+ load();
+}
diff --git a/tools/testing/selftests/bpf/progs/bpf_smc.c
b/tools/testing/selftests/bpf/progs/bpf_smc.c
new file mode 100644
index 00000000..ebff477
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/bpf_smc.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "vmlinux.h"
+
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+struct smc_bpf_ops_ctx {
+ struct {
+ struct tcp_sock *tp;
+ } set_option;
+ struct {
+ const struct tcp_sock *tp;
+ struct inet_request_sock *ireq;
+ int smc_ok;
+ } set_option_cond;
+};
+
+struct smc_bpf_ops {
+ void (*set_option)(struct smc_bpf_ops_ctx *ctx);
+ void (*set_option_cond)(struct smc_bpf_ops_ctx *ctx);
+};
+
+SEC("struct_ops/bpf_smc_set_tcp_option_cond")
+void BPF_PROG(bpf_smc_set_tcp_option_cond, struct smc_bpf_ops_ctx *arg)
+{
+ arg->set_option_cond.smc_ok = 1;
+}
+
+SEC("struct_ops/bpf_smc_set_tcp_option")
+void BPF_PROG(bpf_smc_set_tcp_option, struct smc_bpf_ops_ctx *arg)
+{
+ struct tcp_sock *tp = arg->set_option.tp;
+
+ tp->syn_smc = 1;
+}
+
+SEC(".struct_ops.link")
+struct smc_bpf_ops sample_smc_bpf_ops = {
+ .set_option = (void *) bpf_smc_set_tcp_option,
+ .set_option_cond = (void *) bpf_smc_set_tcp_option_cond,
+};
