[bpf-next,v4,3/3] selftests/bpf: add testcase for FENTRY/FEXIT with 6+ arguments
Commit Message
From: Menglong Dong <imagedong@tencent.com>
Add test9/test10 in fexit_test.c and fentry_test.c to test the fentry
and fexit whose target function have 7/12 arguments.
Correspondingly, add bpf_testmod_fentry_test7() and
bpf_testmod_fentry_test12() to bpf_testmod.c
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
Signed-off-by: Menglong Dong <imagedong@tencent.com>
---
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
---
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++++-
.../selftests/bpf/prog_tests/fentry_fexit.c | 4 +-
.../selftests/bpf/prog_tests/fentry_test.c | 2 +
.../selftests/bpf/prog_tests/fexit_test.c | 2 +
.../testing/selftests/bpf/progs/fentry_test.c | 33 +++++++++++
.../testing/selftests/bpf/progs/fexit_test.c | 57 +++++++++++++++++++
6 files changed, 115 insertions(+), 2 deletions(-)
Comments
On 6/9/23 2:56 AM, menglong8.dong@gmail.com wrote:
> From: Menglong Dong <imagedong@tencent.com>
>
> Add test9/test10 in fexit_test.c and fentry_test.c to test the fentry
> and fexit whose target function have 7/12 arguments.
>
> Correspondingly, add bpf_testmod_fentry_test7() and
> bpf_testmod_fentry_test12() to bpf_testmod.c
>
> 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
>
> Signed-off-by: Menglong Dong <imagedong@tencent.com>
> ---
> 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
> ---
> .../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++++-
> .../selftests/bpf/prog_tests/fentry_fexit.c | 4 +-
> .../selftests/bpf/prog_tests/fentry_test.c | 2 +
> .../selftests/bpf/prog_tests/fexit_test.c | 2 +
> .../testing/selftests/bpf/progs/fentry_test.c | 33 +++++++++++
> .../testing/selftests/bpf/progs/fexit_test.c | 57 +++++++++++++++++++
> 6 files changed, 115 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> index cf216041876c..66615fdbe3df 100644
> --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> @@ -191,6 +191,19 @@ 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, u64 f, u64 g)
> +{
> + return a + (long)b + c + d + (long)e + f + g;
> +}
> +
> +noinline int bpf_testmod_fentry_test12(u64 a, void *b, short c, int d,
> + void *e, u64 f, u64 g, u64 h,
> + u64 i, u64 j, u64 k, u64 l)
> +{
> + return a + (long)b + c + d + (long)e + f + g + h + i + j + k + l;
> +}
It would be great to add a couple cases with struct arguments
where each struct has 8 < struct_size <= 16.
> __diag_pop();
>
> int bpf_testmod_fentry_ok;
> @@ -245,7 +258,11 @@ 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_test12(16, (void *)17, 18, 19, (void *)20,
> + 21, 22, 23, 24, 25, 26, 27) != 258)
> goto out;
>
> bpf_testmod_fentry_ok = 1;
[...]
> diff --git a/tools/testing/selftests/bpf/progs/fexit_test.c b/tools/testing/selftests/bpf/progs/fexit_test.c
> index 8f1ccb7302e1..a6d8e03ff5b7 100644
> --- a/tools/testing/selftests/bpf/progs/fexit_test.c
> +++ b/tools/testing/selftests/bpf/progs/fexit_test.c
> @@ -78,3 +78,60 @@ 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_test12")
> +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,
> + unsigned char l)
> +{
> + __u64 ret;
> + int err;
> +
> + /* BPF_PROG() don't support 14 arguments, and ctx[12] can't be
> + * accessed yet. So we get the return value by bpf_get_func_ret()
> + * for now.
> + */
> + err = bpf_get_func_ret(ctx, &ret);
Maybe just have 11 arguments for this test case?
> + if (err)
> + return 0;
> +
> + 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 && l == 27 &&
> + (int)ret == 258;
> + return 0;
> +}
> +
> +__u64 test11_result = 0;
> +SEC("fexit/bpf_testmod_fentry_test12")
> +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 l)
> +{
> + __u64 ret;
> + int err;
> +
> + /* BPF_PROG() don't support 14 arguments, and ctx[12] can't be
> + * accessed yet. So we get the return value by bpf_get_func_ret()
> + * for now.
> + */
> + err = bpf_get_func_ret(ctx, &ret);
> + if (err)
> + return 0;
> +
> + test11_result = a == 16 && b == 17 && c == 18 && d == 19 &&
> + e == 20 && f == 21 && g == 22 && h == 23 &&
> + i == 24 && j == 25 && k == 26 && l == 27 &&
> + ret == 258;
> + return 0;
> +}
On Sat, Jun 10, 2023 at 11:29 AM Yonghong Song <yhs@meta.com> wrote:
>
>
>
> On 6/9/23 2:56 AM, menglong8.dong@gmail.com wrote:
> > From: Menglong Dong <imagedong@tencent.com>
> >
> > Add test9/test10 in fexit_test.c and fentry_test.c to test the fentry
> > and fexit whose target function have 7/12 arguments.
> >
> > Correspondingly, add bpf_testmod_fentry_test7() and
> > bpf_testmod_fentry_test12() to bpf_testmod.c
> >
> > 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
> >
> > Signed-off-by: Menglong Dong <imagedong@tencent.com>
> > ---
> > 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
> > ---
> > .../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++++-
> > .../selftests/bpf/prog_tests/fentry_fexit.c | 4 +-
> > .../selftests/bpf/prog_tests/fentry_test.c | 2 +
> > .../selftests/bpf/prog_tests/fexit_test.c | 2 +
> > .../testing/selftests/bpf/progs/fentry_test.c | 33 +++++++++++
> > .../testing/selftests/bpf/progs/fexit_test.c | 57 +++++++++++++++++++
> > 6 files changed, 115 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> > index cf216041876c..66615fdbe3df 100644
> > --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> > +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
> > @@ -191,6 +191,19 @@ 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, u64 f, u64 g)
> > +{
> > + return a + (long)b + c + d + (long)e + f + g;
> > +}
> > +
> > +noinline int bpf_testmod_fentry_test12(u64 a, void *b, short c, int d,
> > + void *e, u64 f, u64 g, u64 h,
> > + u64 i, u64 j, u64 k, u64 l)
> > +{
> > + return a + (long)b + c + d + (long)e + f + g + h + i + j + k + l;
> > +}
>
> It would be great to add a couple cases with struct arguments
> where each struct has 8 < struct_size <= 16.
Good idea. And I'll add extra test cases for the case
you mentioned before.
> > __diag_pop();
> >
> > int bpf_testmod_fentry_ok;
> > @@ -245,7 +258,11 @@ 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_test12(16, (void *)17, 18, 19, (void *)20,
> > + 21, 22, 23, 24, 25, 26, 27) != 258)
> > goto out;
> >
> > bpf_testmod_fentry_ok = 1;
> [...]
> > diff --git a/tools/testing/selftests/bpf/progs/fexit_test.c b/tools/testing/selftests/bpf/progs/fexit_test.c
> > index 8f1ccb7302e1..a6d8e03ff5b7 100644
> > --- a/tools/testing/selftests/bpf/progs/fexit_test.c
> > +++ b/tools/testing/selftests/bpf/progs/fexit_test.c
> > @@ -78,3 +78,60 @@ 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_test12")
> > +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,
> > + unsigned char l)
> > +{
> > + __u64 ret;
> > + int err;
> > +
> > + /* BPF_PROG() don't support 14 arguments, and ctx[12] can't be
> > + * accessed yet. So we get the return value by bpf_get_func_ret()
> > + * for now.
> > + */
> > + err = bpf_get_func_ret(ctx, &ret);
>
> Maybe just have 11 arguments for this test case?
>
> > + if (err)
> > + return 0;
> > +
> > + 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 && l == 27 &&
> > + (int)ret == 258;
> > + return 0;
> > +}
> > +
> > +__u64 test11_result = 0;
> > +SEC("fexit/bpf_testmod_fentry_test12")
> > +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 l)
> > +{
> > + __u64 ret;
> > + int err;
> > +
> > + /* BPF_PROG() don't support 14 arguments, and ctx[12] can't be
> > + * accessed yet. So we get the return value by bpf_get_func_ret()
> > + * for now.
> > + */
> > + err = bpf_get_func_ret(ctx, &ret);
> > + if (err)
> > + return 0;
> > +
> > + test11_result = a == 16 && b == 17 && c == 18 && d == 19 &&
> > + e == 20 && f == 21 && g == 22 && h == 23 &&
> > + i == 24 && j == 25 && k == 26 && l == 27 &&
> > + ret == 258;
> > + return 0;
> > +}
@@ -191,6 +191,19 @@ 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, u64 f, u64 g)
+{
+ return a + (long)b + c + d + (long)e + f + g;
+}
+
+noinline int bpf_testmod_fentry_test12(u64 a, void *b, short c, int d,
+ void *e, u64 f, u64 g, u64 h,
+ u64 i, u64 j, u64 k, u64 l)
+{
+ return a + (long)b + c + d + (long)e + f + g + h + i + j + k + l;
+}
+
__diag_pop();
int bpf_testmod_fentry_ok;
@@ -245,7 +258,11 @@ 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_test12(16, (void *)17, 18, 19, (void *)20,
+ 21, 22, 23, 24, 25, 26, 27) != 258)
goto out;
bpf_testmod_fentry_ok = 1;
@@ -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 < 11; i++) {
ASSERT_EQ(fentry_res[i], 1, "fentry result");
ASSERT_EQ(fexit_res[i], 1, "fexit result");
}
@@ -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"))
@@ -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"))
@@ -77,3 +77,36 @@ 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_test12")
+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,
+ unsigned char l)
+{
+ 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 && l == 27;
+ return 0;
+}
+
+__u64 test11_result = 0;
+SEC("fentry/bpf_testmod_fentry_test12")
+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 l)
+{
+ test11_result = a == 16 && b == 17 && c == 18 && d == 19 &&
+ e == 20 && f == 21 && g == 22 && h == 23 &&
+ i == 24 && j == 25 && k == 26 && l == 27;
+ return 0;
+}
@@ -78,3 +78,60 @@ 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_test12")
+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,
+ unsigned char l)
+{
+ __u64 ret;
+ int err;
+
+ /* BPF_PROG() don't support 14 arguments, and ctx[12] can't be
+ * accessed yet. So we get the return value by bpf_get_func_ret()
+ * for now.
+ */
+ err = bpf_get_func_ret(ctx, &ret);
+ if (err)
+ return 0;
+
+ 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 && l == 27 &&
+ (int)ret == 258;
+ return 0;
+}
+
+__u64 test11_result = 0;
+SEC("fexit/bpf_testmod_fentry_test12")
+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 l)
+{
+ __u64 ret;
+ int err;
+
+ /* BPF_PROG() don't support 14 arguments, and ctx[12] can't be
+ * accessed yet. So we get the return value by bpf_get_func_ret()
+ * for now.
+ */
+ err = bpf_get_func_ret(ctx, &ret);
+ if (err)
+ return 0;
+
+ test11_result = a == 16 && b == 17 && c == 18 && d == 19 &&
+ e == 20 && f == 21 && g == 22 && h == 23 &&
+ i == 24 && j == 25 && k == 26 && l == 27 &&
+ ret == 258;
+ return 0;
+}