[PATCH bpf-next v5 3/3] selftests/bpf: add testcase for TRACING with 6+ arguments
From: menglong8 . dong
Date: Mon Jun 12 2023 - 22:53:29 EST
From: Menglong Dong <imagedong@xxxxxxxxxxx>
Add test9/test10 in fexit_test.c and fentry_test.c to test the fentry
and fexit whose target function have 7/11 arguments.
Correspondingly, add bpf_testmod_fentry_test7() and
bpf_testmod_fentry_test11() to bpf_testmod.c
Meanwhile, add bpf_modify_return_test2() to test_run.c to test the
MODIFY_RETURN with 7 arguments.
And the testcases passed:
./test_progs -t fexit
Summary: 5/12 PASSED, 0 SKIPPED, 0 FAILED
./test_progs -t fentry
Summary: 3/0 PASSED, 0 SKIPPED, 0 FAILED
./test_progs -t modify_return
Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Menglong Dong <imagedong@xxxxxxxxxxx>
---
v5:
- add testcases for MODIFY_RETURN
v4:
- use different type for args in bpf_testmod_fentry_test{7,12}
- add testcase for grabage values in ctx
v3:
- move bpf_fentry_test{7,12} to bpf_testmod.c and rename them to
bpf_testmod_fentry_test{7,12} meanwhile
- get return value by bpf_get_func_ret() in
"fexit/bpf_testmod_fentry_test12", as we don't change ___bpf_ctx_cast()
in this version
---
net/bpf/test_run.c | 23 ++++++--
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 45 +++++++++++++++-
.../selftests/bpf/prog_tests/fentry_fexit.c | 4 +-
.../selftests/bpf/prog_tests/fentry_test.c | 2 +
.../selftests/bpf/prog_tests/fexit_test.c | 2 +
.../selftests/bpf/prog_tests/modify_return.c | 20 ++++++-
.../testing/selftests/bpf/progs/fentry_test.c | 52 ++++++++++++++++++
.../testing/selftests/bpf/progs/fexit_test.c | 54 +++++++++++++++++++
.../selftests/bpf/progs/modify_return.c | 40 ++++++++++++++
9 files changed, 235 insertions(+), 7 deletions(-)
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 2321bd2f9964..df58e8bf5e07 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -561,6 +561,13 @@ __bpf_kfunc int bpf_modify_return_test(int a, int *b)
return a + *b;
}
+__bpf_kfunc int bpf_modify_return_test2(int a, int *b, short c, int d,
+ void *e, char f, int g)
+{
+ *b += 1;
+ return a + *b + c + d + (long)e + f + g;
+}
+
int noinline bpf_fentry_shadow_test(int a)
{
return a + 1;
@@ -596,9 +603,13 @@ __diag_pop();
BTF_SET8_START(bpf_test_modify_return_ids)
BTF_ID_FLAGS(func, bpf_modify_return_test)
+BTF_ID_FLAGS(func, bpf_modify_return_test2)
BTF_ID_FLAGS(func, bpf_fentry_test1, KF_SLEEPABLE)
BTF_SET8_END(bpf_test_modify_return_ids)
+BTF_ID_LIST(bpf_modify_return_test_id)
+BTF_ID(func, bpf_modify_return_test)
+
static const struct btf_kfunc_id_set bpf_test_modify_return_set = {
.owner = THIS_MODULE,
.set = &bpf_test_modify_return_ids,
@@ -661,9 +672,15 @@ int bpf_prog_test_run_tracing(struct bpf_prog *prog,
goto out;
break;
case BPF_MODIFY_RETURN:
- ret = bpf_modify_return_test(1, &b);
- if (b != 2)
- side_effect = 1;
+ if (prog->aux->attach_btf_id == *bpf_modify_return_test_id) {
+ ret = bpf_modify_return_test(1, &b);
+ if (b != 2)
+ side_effect = 1;
+ } else {
+ ret = bpf_modify_return_test2(1, &b, 3, 4, (void *)5, 6, 7);
+ if (b != 2)
+ side_effect = 1;
+ }
break;
default:
goto out;
diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
index aaf6ef1201c7..737ef0a5dca4 100644
--- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
@@ -34,6 +34,11 @@ struct bpf_testmod_struct_arg_3 {
int b[];
};
+struct bpf_testmod_struct_arg_4 {
+ u64 a;
+ int b;
+};
+
__diag_push();
__diag_ignore_all("-Wmissing-prototypes",
"Global functions as their definitions will be in bpf_testmod.ko BTF");
@@ -191,6 +196,35 @@ noinline int bpf_testmod_fentry_test3(char a, int b, u64 c)
return a + b + c;
}
+noinline int bpf_testmod_fentry_test7(u64 a, void *b, short c, int d,
+ void *e, char f, int g)
+{
+ return a + (long)b + c + d + (long)e + f + g;
+}
+
+noinline int bpf_testmod_fentry_test11(u64 a, void *b, short c, int d,
+ void *e, char f, int g,
+ unsigned int h, long i, __u64 j,
+ unsigned long k)
+{
+ return a + (long)b + c + d + (long)e + f + g + h + i + j + k;
+}
+
+noinline int bpf_testmod_fentry_test_struct1(u64 a, void *b, short c,
+ int d, void *e,
+ struct bpf_testmod_struct_arg_4 f)
+{
+ return a + (long)b + c + d + (long)e + f.a + f.b;
+}
+
+noinline int bpf_testmod_fentry_test_struct2(u64 a, void *b, short c,
+ int d, void *e,
+ struct bpf_testmod_struct_arg_4 f,
+ int g)
+{
+ return a + (long)b + c + d + (long)e + f.a + f.b + g;
+}
+
int bpf_testmod_fentry_ok;
noinline ssize_t
@@ -206,6 +240,7 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj,
struct bpf_testmod_struct_arg_1 struct_arg1 = {10};
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};
int i = 1;
while (bpf_testmod_return_ptr(i))
@@ -243,7 +278,15 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj,
if (bpf_testmod_fentry_test1(1) != 2 ||
bpf_testmod_fentry_test2(2, 3) != 5 ||
- bpf_testmod_fentry_test3(4, 5, 6) != 15)
+ bpf_testmod_fentry_test3(4, 5, 6) != 15 ||
+ bpf_testmod_fentry_test7(16, (void *)17, 18, 19, (void *)20,
+ 21, 22) != 133 ||
+ bpf_testmod_fentry_test11(16, (void *)17, 18, 19, (void *)20,
+ 21, 22, 23, 24, 25, 26) != 231 ||
+ bpf_testmod_fentry_test_struct1(16, (void *)17, 18, 19,
+ (void *)20, struct_arg4) != 133 ||
+ bpf_testmod_fentry_test_struct2(16, (void *)17, 18, 19,
+ (void *)20, struct_arg4, 23) != 156)
goto out;
bpf_testmod_fentry_ok = 1;
diff --git a/tools/testing/selftests/bpf/prog_tests/fentry_fexit.c b/tools/testing/selftests/bpf/prog_tests/fentry_fexit.c
index 130f5b82d2e6..7decf57e7591 100644
--- a/tools/testing/selftests/bpf/prog_tests/fentry_fexit.c
+++ b/tools/testing/selftests/bpf/prog_tests/fentry_fexit.c
@@ -31,10 +31,12 @@ void test_fentry_fexit(void)
ASSERT_OK(err, "ipv6 test_run");
ASSERT_OK(topts.retval, "ipv6 test retval");
+ ASSERT_OK(trigger_module_test_read(1), "trigger_read");
+
fentry_res = (__u64 *)fentry_skel->bss;
fexit_res = (__u64 *)fexit_skel->bss;
printf("%lld\n", fentry_skel->bss->test1_result);
- for (i = 0; i < 8; i++) {
+ for (i = 0; i < 13; i++) {
ASSERT_EQ(fentry_res[i], 1, "fentry result");
ASSERT_EQ(fexit_res[i], 1, "fexit result");
}
diff --git a/tools/testing/selftests/bpf/prog_tests/fentry_test.c b/tools/testing/selftests/bpf/prog_tests/fentry_test.c
index c0d1d61d5f66..e1c0ce40febf 100644
--- a/tools/testing/selftests/bpf/prog_tests/fentry_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/fentry_test.c
@@ -24,6 +24,8 @@ static int fentry_test(struct fentry_test_lskel *fentry_skel)
ASSERT_OK(err, "test_run");
ASSERT_EQ(topts.retval, 0, "test_run");
+ ASSERT_OK(trigger_module_test_read(1), "trigger_read");
+
result = (__u64 *)fentry_skel->bss;
for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) {
if (!ASSERT_EQ(result[i], 1, "fentry_result"))
diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_test.c b/tools/testing/selftests/bpf/prog_tests/fexit_test.c
index 101b7343036b..ea81fa913ec6 100644
--- a/tools/testing/selftests/bpf/prog_tests/fexit_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_test.c
@@ -24,6 +24,8 @@ static int fexit_test(struct fexit_test_lskel *fexit_skel)
ASSERT_OK(err, "test_run");
ASSERT_EQ(topts.retval, 0, "test_run");
+ ASSERT_OK(trigger_module_test_read(1), "trigger_read");
+
result = (__u64 *)fexit_skel->bss;
for (i = 0; i < sizeof(*fexit_skel->bss) / sizeof(__u64); i++) {
if (!ASSERT_EQ(result[i], 1, "fexit_result"))
diff --git a/tools/testing/selftests/bpf/prog_tests/modify_return.c b/tools/testing/selftests/bpf/prog_tests/modify_return.c
index 5d9955af6247..93febb6d81ef 100644
--- a/tools/testing/selftests/bpf/prog_tests/modify_return.c
+++ b/tools/testing/selftests/bpf/prog_tests/modify_return.c
@@ -11,7 +11,8 @@
#define UPPER(x) ((x) >> 16)
-static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret)
+static void run_test(__u32 input_retval, __u16 want_side_effect,
+ __s16 want_ret, __s16 want_ret2)
{
struct modify_return *skel = NULL;
int err, prog_fd;
@@ -41,6 +42,19 @@ static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret)
ASSERT_EQ(skel->bss->fexit_result, 1, "modify_return fexit_result");
ASSERT_EQ(skel->bss->fmod_ret_result, 1, "modify_return fmod_ret_result");
+ prog_fd = bpf_program__fd(skel->progs.fmod_ret_test2);
+ err = bpf_prog_test_run_opts(prog_fd, &topts);
+ ASSERT_OK(err, "test_run");
+
+ side_effect = UPPER(topts.retval);
+ ret = LOWER(topts.retval);
+
+ ASSERT_EQ(ret, want_ret2, "test_run ret2");
+ ASSERT_EQ(side_effect, want_side_effect, "modify_return side_effect2");
+ ASSERT_EQ(skel->bss->fentry_result2, 1, "modify_return fentry_result2");
+ ASSERT_EQ(skel->bss->fexit_result2, 1, "modify_return fexit_result2");
+ ASSERT_EQ(skel->bss->fmod_ret_result2, 1, "modify_return fmod_ret_result2");
+
cleanup:
modify_return__destroy(skel);
}
@@ -50,8 +64,10 @@ void serial_test_modify_return(void)
{
run_test(0 /* input_retval */,
1 /* want_side_effect */,
- 4 /* want_ret */);
+ 4 /* want_ret */,
+ 29 /* want_ret */);
run_test(-EINVAL /* input_retval */,
0 /* want_side_effect */,
+ -EINVAL /* want_ret */,
-EINVAL /* want_ret */);
}
diff --git a/tools/testing/selftests/bpf/progs/fentry_test.c b/tools/testing/selftests/bpf/progs/fentry_test.c
index 52a550d281d9..3614c85c4ead 100644
--- a/tools/testing/selftests/bpf/progs/fentry_test.c
+++ b/tools/testing/selftests/bpf/progs/fentry_test.c
@@ -77,3 +77,55 @@ int BPF_PROG(test8, struct bpf_fentry_test_t *arg)
test8_result = 1;
return 0;
}
+
+__u64 test9_result = 0;
+SEC("fentry/bpf_testmod_fentry_test7")
+int BPF_PROG(test9, __u64 a, void *b, short c, int d, void *e, char f,
+ int g)
+{
+ test9_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && f == 21 && g == 22;
+ return 0;
+}
+
+__u64 test10_result = 0;
+SEC("fentry/bpf_testmod_fentry_test11")
+int BPF_PROG(test10, __u64 a, void *b, short c, int d, void *e, char f,
+ int g, unsigned int h, long i, __u64 j, unsigned long k)
+{
+ test10_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && f == 21 && g == 22 && h == 23 &&
+ i == 24 && j == 25 && k == 26;
+ return 0;
+}
+
+__u64 test11_result = 0;
+SEC("fentry/bpf_testmod_fentry_test11")
+int BPF_PROG(test11, __u64 a, __u64 b, __u64 c, __u64 d, __u64 e, __u64 f,
+ __u64 g, __u64 h, __u64 i, __u64 j, __u64 k)
+{
+ test11_result = a == 16 && b == 17 && c == 18 && d == 19 &&
+ e == 20 && f == 21 && g == 22 && h == 23 &&
+ i == 24 && j == 25 && k == 26;
+ return 0;
+}
+
+__u64 test12_result = 0;
+SEC("fentry/bpf_testmod_fentry_test_struct1")
+int BPF_PROG(test12, __u64 a, void *b, short c, int d, void *e, __u64 s_a,
+ int s_b)
+{
+ test12_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && s_a == 21 && s_b == 22;
+ return 0;
+}
+
+__u64 test13_result = 0;
+SEC("fentry/bpf_testmod_fentry_test_struct2")
+int BPF_PROG(test13, __u64 a, void *b, short c, int d, void *e, __u64 s_a,
+ int s_b, int f)
+{
+ test13_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && s_a == 21 && s_b == 22 && f == 23;
+ return 0;
+}
diff --git a/tools/testing/selftests/bpf/progs/fexit_test.c b/tools/testing/selftests/bpf/progs/fexit_test.c
index 8f1ccb7302e1..f6c50e4663db 100644
--- a/tools/testing/selftests/bpf/progs/fexit_test.c
+++ b/tools/testing/selftests/bpf/progs/fexit_test.c
@@ -78,3 +78,57 @@ int BPF_PROG(test8, struct bpf_fentry_test_t *arg)
test8_result = 1;
return 0;
}
+
+__u64 test9_result = 0;
+SEC("fexit/bpf_testmod_fentry_test7")
+int BPF_PROG(test9, __u64 a, void *b, short c, int d, void *e, char f,
+ int g, int ret)
+{
+ test9_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && f == 21 && g == 22 && ret == 133;
+ return 0;
+}
+
+__u64 test10_result = 0;
+SEC("fexit/bpf_testmod_fentry_test11")
+int BPF_PROG(test10, __u64 a, void *b, short c, int d, void *e, char f,
+ int g, unsigned int h, long i, __u64 j, unsigned long k,
+ int ret)
+{
+ test10_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && f == 21 && g == 22 && h == 23 &&
+ i == 24 && j == 25 && k == 26 && ret == 231;
+ return 0;
+}
+
+__u64 test11_result = 0;
+SEC("fexit/bpf_testmod_fentry_test11")
+int BPF_PROG(test11, __u64 a, __u64 b, __u64 c, __u64 d, __u64 e, __u64 f,
+ __u64 g, __u64 h, __u64 i, __u64 j, __u64 k, __u64 ret)
+{
+ test11_result = a == 16 && b == 17 && c == 18 && d == 19 &&
+ e == 20 && f == 21 && g == 22 && h == 23 &&
+ i == 24 && j == 25 && k == 26 && ret == 231;
+ return 0;
+}
+
+__u64 test12_result = 0;
+SEC("fexit/bpf_testmod_fentry_test_struct1")
+int BPF_PROG(test12, __u64 a, void *b, short c, int d, void *e, __u64 s_a,
+ int s_b, __u64 ret)
+{
+ test12_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && s_a == 21 && s_b == 22 && ret == 133;
+ return 0;
+}
+
+__u64 test13_result = 0;
+SEC("fexit/bpf_testmod_fentry_test_struct2")
+int BPF_PROG(test13, __u64 a, void *b, short c, int d, void *e, __u64 s_a,
+ int s_b, int f, __u64 ret)
+{
+ test13_result = a == 16 && b == (void *)17 && c == 18 && d == 19 &&
+ e == (void *)20 && s_a == 21 && s_b == 22 && f == 23 &&
+ ret == 156;
+ return 0;
+}
diff --git a/tools/testing/selftests/bpf/progs/modify_return.c b/tools/testing/selftests/bpf/progs/modify_return.c
index 8b7466a15c6b..3376d4849f58 100644
--- a/tools/testing/selftests/bpf/progs/modify_return.c
+++ b/tools/testing/selftests/bpf/progs/modify_return.c
@@ -47,3 +47,43 @@ int BPF_PROG(fexit_test, int a, __u64 b, int ret)
return 0;
}
+
+static int sequence2;
+
+__u64 fentry_result2 = 0;
+SEC("fentry/bpf_modify_return_test2")
+int BPF_PROG(fentry_test2, int a, int *b, short c, int d, void *e, char f,
+ int g)
+{
+ sequence2++;
+ fentry_result2 = (sequence2 == 1);
+ return 0;
+}
+
+__u64 fmod_ret_result2 = 0;
+SEC("fmod_ret/bpf_modify_return_test2")
+int BPF_PROG(fmod_ret_test2, int a, int *b, short c, int d, void *e, char f,
+ int g, int ret)
+{
+ sequence2++;
+ /* This is the first fmod_ret program, the ret passed should be 0 */
+ fmod_ret_result2 = (sequence2 == 2 && ret == 0);
+ return input_retval;
+}
+
+__u64 fexit_result2 = 0;
+SEC("fexit/bpf_modify_return_test2")
+int BPF_PROG(fexit_test2, int a, int *b, short c, int d, void *e, char f,
+ int g, int ret)
+{
+ sequence2++;
+ /* If the input_reval is non-zero a successful modification should have
+ * occurred.
+ */
+ if (input_retval)
+ fexit_result2 = (sequence2 == 3 && ret == input_retval);
+ else
+ fexit_result2 = (sequence2 == 3 && ret == 29);
+
+ return 0;
+}
--
2.40.1