[PATCH bpf-next v6 3/3] selftests/bpf: Add testcase where 7th argment is struct

Pu Lehui
2024-07-02T12:18:08Z

From: Pu Lehui <pulehui@huawei.com>

Add testcase where 7th argument is struct for architectures with 8
argument registers, and increase the complexity of the struct.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
---
tools/testing/selftests/bpf/DENYLIST.aarch64 | 1 +
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++++++++
.../selftests/bpf/prog_tests/tracing_struct.c | 14 ++++++++
.../bpf/progs/tracing_struct_many_args.c | 35 +++++++++++++++++++
4 files changed, 69 insertions(+)

diff --git a/tools/testing/selftests/bpf/DENYLIST.aarch64 b/tools/testing/selftests/bpf/DENYLIST.aarch64
index 0445ac38bc07..3c7c3e79aa93 100644
--- a/tools/testing/selftests/bpf/DENYLIST.aarch64
+++ b/tools/testing/selftests/bpf/DENYLIST.aarch64
@@ -6,6 +6,7 @@ kprobe_multi_test # needs CONFIG_FPROBE
module_attach # prog 'kprobe_multi': failed to auto-attach: -95
fentry_test/fentry_many_args # fentry_many_args:FAIL:fentry_many_args_attach unexpected error: -524
fexit_test/fexit_many_args # fexit_many_args:FAIL:fexit_many_args_attach unexpected error: -524
+tracing_struct/struct_many_args # struct_many_args:FAIL:tracing_struct_many_args__attach unexpected error: -524
fill_link_info/kprobe_multi_link_info # bpf_program__attach_kprobe_multi_opts unexpected error: -95
fill_link_info/kretprobe_multi_link_info # bpf_program__attach_kprobe_multi_opts unexpected error: -95
fill_link_info/kprobe_multi_invalid_ubuff # bpf_program__attach_kprobe_multi_opts unexpected error: -95
diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
index d8bd01d8560b..f8962a1dd397 100644
--- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
@@ -53,6 +53,13 @@ struct bpf_testmod_struct_arg_4 {
int b;
};

+struct bpf_testmod_struct_arg_5 {
+ char a;
+ short b;
+ int c;
+ long d;
+};
+
__bpf_hook_start();

noinline int
@@ -110,6 +117,15 @@ bpf_testmod_test_struct_arg_8(u64 a, void *b, short c, int d, void *e,
return bpf_testmod_test_struct_arg_result;
}

+noinline int
+bpf_testmod_test_struct_arg_9(u64 a, void *b, short c, int d, void *e, char f,
+ short g, struct bpf_testmod_struct_arg_5 h, long i)
+{
+ bpf_testmod_test_struct_arg_result = a + (long)b + c + d + (long)e +
+ f + g + h.a + h.b + h.c + h.d + i;
+ return bpf_testmod_test_struct_arg_result;
+}
+
noinline int
bpf_testmod_test_arg_ptr_to_struct(struct bpf_testmod_struct_arg_1 *a) {
bpf_testmod_test_struct_arg_result = a->a;
@@ -305,6 +321,7 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj,
struct bpf_testmod_struct_arg_2 struct_arg2 = {2, 3};
struct bpf_testmod_struct_arg_3 *struct_arg3;
struct bpf_testmod_struct_arg_4 struct_arg4 = {21, 22};
+ struct bpf_testmod_struct_arg_5 struct_arg5 = {23, 24, 25, 26};
int i = 1;

while (bpf_testmod_return_ptr(i))
@@ -319,6 +336,8 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj,
(void *)20, struct_arg4);
(void)bpf_testmod_test_struct_arg_8(16, (void *)17, 18, 19,
(void *)20, struct_arg4, 23);
+ (void)bpf_testmod_test_struct_arg_9(16, (void *)17, 18, 19, (void *)20,
+ 21, 22, struct_arg5, 27);

(void)bpf_testmod_test_arg_ptr_to_struct(&struct_arg1_2);

diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_struct.c b/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
index cb2a95da2617..19e68d4b3532 100644
--- a/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
+++ b/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
@@ -94,6 +94,20 @@ static void test_struct_many_args(void)
ASSERT_EQ(skel->bss->t8_g, 23, "t8:g");
ASSERT_EQ(skel->bss->t8_ret, 156, "t8 ret");

+ ASSERT_EQ(skel->bss->t9_a, 16, "t9:a");
+ ASSERT_EQ(skel->bss->t9_b, 17, "t9:b");
+ ASSERT_EQ(skel->bss->t9_c, 18, "t9:c");
+ ASSERT_EQ(skel->bss->t9_d, 19, "t9:d");
+ ASSERT_EQ(skel->bss->t9_e, 20, "t9:e");
+ ASSERT_EQ(skel->bss->t9_f, 21, "t9:f");
+ ASSERT_EQ(skel->bss->t9_g, 22, "t9:f");
+ ASSERT_EQ(skel->bss->t9_h_a, 23, "t9:h.a");
+ ASSERT_EQ(skel->bss->t9_h_b, 24, "t9:h.b");
+ ASSERT_EQ(skel->bss->t9_h_c, 25, "t9:h.c");
+ ASSERT_EQ(skel->bss->t9_h_d, 26, "t9:h.d");
+ ASSERT_EQ(skel->bss->t9_i, 27, "t9:i");
+ ASSERT_EQ(skel->bss->t9_ret, 258, "t9 ret");
+
destroy_skel:
tracing_struct_many_args__destroy(skel);
}
diff --git a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
index 3de4bb918178..4742012ace06 100644
--- a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
+++ b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
@@ -8,8 +8,16 @@ struct bpf_testmod_struct_arg_4 {
int b;
};

+struct bpf_testmod_struct_arg_5 {
+ char a;
+ short b;
+ int c;
+ long d;
+};
+
long t7_a, t7_b, t7_c, t7_d, t7_e, t7_f_a, t7_f_b, t7_ret;
long t8_a, t8_b, t8_c, t8_d, t8_e, t8_f_a, t8_f_b, t8_g, t8_ret;
+long t9_a, t9_b, t9_c, t9_d, t9_e, t9_f, t9_g, t9_h_a, t9_h_b, t9_h_c, t9_h_d, t9_i, t9_ret;

SEC("fentry/bpf_testmod_test_struct_arg_7")
int BPF_PROG2(test_struct_many_args_1, __u64, a, void *, b, short, c, int, d,
@@ -57,4 +65,31 @@ int BPF_PROG2(test_struct_many_args_4, __u64, a, void *, b, short, c, int, d,
return 0;
}

+SEC("fentry/bpf_testmod_test_struct_arg_9")
+int BPF_PROG2(test_struct_many_args_5, __u64, a, void *, b, short, c, int, d, void *, e,
+ char, f, short, g, struct bpf_testmod_struct_arg_5, h, long, i)
+{
+ t9_a = a;
+ t9_b = (long)b;
+ t9_c = c;
+ t9_d = d;
+ t9_e = (long)e;
+ t9_f = f;
+ t9_g = g;
+ t9_h_a = h.a;
+ t9_h_b = h.b;
+ t9_h_c = h.c;
+ t9_h_d = h.d;
+ t9_i = i;
+ return 0;
+}
+
+SEC("fexit/bpf_testmod_test_struct_arg_9")
+int BPF_PROG2(test_struct_many_args_6, __u64, a, void *, b, short, c, int, d, void *, e,
+ char, f, short, g, struct bpf_testmod_struct_arg_5, h, long, i, int, ret)
+{
+ t9_ret = ret;
+ return 0;
+}
+
char _license[] SEC("license") = "GPL";
--
2.34.1