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selftests/bpf: Add set_attach_target() API selftest for module target

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Add test for bpf_program__set_attach_target() API, validating it can find
kernel module fentry target.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20201211215825.3646154-3-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2020-12-11 13:58:25 -08:00
committed by Daniel Borkmann
parent fe62de310e
commit 2e33f831fc
2 changed files with 21 additions and 1 deletions
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11
tools/testing/selftests/bpf/progs/test_module_attach.c
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@@ -38,6 +38,17 @@ int BPF_PROG(handle_fentry,
return 0;
}
__u32 fentry_manual_read_sz = 0;
SEC("fentry/placeholder")
int BPF_PROG(handle_fentry_manual,
struct file *file, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
{
fentry_manual_read_sz = len;
return 0;
}
__u32 fexit_read_sz = 0;
int fexit_ret = 0;