commit fee356ede980b6c2c8db612e18b25738356d6744 upstream.
Adding 3 bpf_testmod_fentry_* functions to have a way to test kprobe multi link on kernel module. They follow bpf_fentry_test* functions prototypes/code.
Adding equivalent functions to all bpf_fentry_test* does not seems necessary at the moment, could be added later.
Acked-by: Song Liu song@kernel.org Signed-off-by: Jiri Olsa jolsa@kernel.org Link: https://lore.kernel.org/r/20221025134148.3300700-7-jolsa@kernel.org Signed-off-by: Alexei Starovoitov ast@kernel.org --- .../selftests/bpf/bpf_testmod/bpf_testmod.c | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c index 792cb15bac40..ac5d7c1396fb 100644 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c @@ -88,6 +88,23 @@ __weak noinline struct file *bpf_testmod_return_ptr(int arg) } }
+noinline int bpf_testmod_fentry_test1(int a) +{ + return a + 1; +} + +noinline int bpf_testmod_fentry_test2(int a, u64 b) +{ + return a + b; +} + +noinline int bpf_testmod_fentry_test3(char a, int b, u64 c) +{ + return a + b + c; +} + +int bpf_testmod_fentry_ok; + noinline ssize_t bpf_testmod_test_read(struct file *file, struct kobject *kobj, struct bin_attribute *bin_attr, @@ -119,6 +136,13 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj, return snprintf(buf, len, "%d\n", writable.val); }
+ if (bpf_testmod_fentry_test1(1) != 2 || + bpf_testmod_fentry_test2(2, 3) != 5 || + bpf_testmod_fentry_test3(4, 5, 6) != 15) + goto out; + + bpf_testmod_fentry_ok = 1; +out: return -EIO; /* always fail */ } EXPORT_SYMBOL(bpf_testmod_test_read);