Commit 738a2f2f authored by Hao Luo's avatar Hao Luo Committed by Andrii Nakryiko
Browse files

selftests/bpf: Tests libbpf autoattach APIs 



Adds test for libbpf APIs that toggle bpf program auto-attaching.

Signed-off-by: default avatarHao Luo <haoluo@google.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220816234012.910255-2-haoluo@google.com
parent 43cb8cba

tools/testing/selftests/bpf/prog_tests/autoattach.c

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// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2022 Google */



#include <test_progs.h>

#include "test_autoattach.skel.h"



void test_autoattach(void)

{

	struct test_autoattach *skel;



	skel = test_autoattach__open_and_load();

	if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))

		goto cleanup;



	/* disable auto-attach for prog2 */

	bpf_program__set_autoattach(skel->progs.prog2, false);

	ASSERT_TRUE(bpf_program__autoattach(skel->progs.prog1), "autoattach_prog1");

	ASSERT_FALSE(bpf_program__autoattach(skel->progs.prog2), "autoattach_prog2");

	if (!ASSERT_OK(test_autoattach__attach(skel), "skel_attach"))

		goto cleanup;



	usleep(1);



	ASSERT_TRUE(skel->bss->prog1_called, "attached_prog1");

	ASSERT_FALSE(skel->bss->prog2_called, "attached_prog2");



cleanup:

	test_autoattach__destroy(skel);

}

tools/testing/selftests/bpf/progs/test_autoattach.c

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// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2022 Google */



#include "vmlinux.h"

#include <bpf/bpf_tracing.h>



bool prog1_called = false;

bool prog2_called = false;



SEC("raw_tp/sys_enter")

int prog1(const void *ctx)

{

	prog1_called = true;

	return 0;

}



SEC("raw_tp/sys_exit")

int prog2(const void *ctx)

{

	prog2_called = true;

	return 0;

}