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selftests/bpf: Add bpf_testmod_fentry_* functions

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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>
This commit is contained in:
Jiri Olsa 2022-10-25 15:41:46 +02:00 committed by Alexei Starovoitov
parent 10705b2b7a
commit fee356ede9
1 changed files with 24 additions and 0 deletions
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24
tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
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@ -128,6 +128,23 @@ __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,
@ -167,6 +184,13 @@ 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);