Commit 6419d08b authored by Mykyta Yatsenko's avatar Mykyta Yatsenko Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add tests for bpf_object__prepare 



Add selftests, checking that running bpf_object__prepare successfully
creates maps before load step.

Signed-off-by: default avatarMykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250303135752.158343-5-mykyta.yatsenko5@gmail.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 1315c28e

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

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// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2025 Meta */



#include <test_progs.h>

#include <network_helpers.h>

#include "prepare.skel.h"



static bool check_prepared(struct bpf_object *obj)

{

	bool is_prepared = true;

	const struct bpf_map *map;



	bpf_object__for_each_map(map, obj) {

		if (bpf_map__fd(map) < 0)

			is_prepared = false;

	}



	return is_prepared;

}



static void test_prepare_no_load(void)

{

	struct prepare *skel;

	int err;

	LIBBPF_OPTS(bpf_test_run_opts, topts,

		    .data_in = &pkt_v4,

		    .data_size_in = sizeof(pkt_v4),

	);



	skel = prepare__open();

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

		return;



	if (!ASSERT_FALSE(check_prepared(skel->obj), "not check_prepared"))

		goto cleanup;



	err = bpf_object__prepare(skel->obj);



	if (!ASSERT_TRUE(check_prepared(skel->obj), "check_prepared"))

		goto cleanup;



	if (!ASSERT_OK(err, "bpf_object__prepare"))

		goto cleanup;



cleanup:

	prepare__destroy(skel);

}



static void test_prepare_load(void)

{

	struct prepare *skel;

	int err, prog_fd;

	LIBBPF_OPTS(bpf_test_run_opts, topts,

		    .data_in = &pkt_v4,

		    .data_size_in = sizeof(pkt_v4),

	);



	skel = prepare__open();

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

		return;



	if (!ASSERT_FALSE(check_prepared(skel->obj), "not check_prepared"))

		goto cleanup;



	err = bpf_object__prepare(skel->obj);

	if (!ASSERT_OK(err, "bpf_object__prepare"))

		goto cleanup;



	err = prepare__load(skel);

	if (!ASSERT_OK(err, "prepare__load"))

		goto cleanup;



	if (!ASSERT_TRUE(check_prepared(skel->obj), "check_prepared"))

		goto cleanup;



	prog_fd = bpf_program__fd(skel->progs.program);

	if (!ASSERT_GE(prog_fd, 0, "prog_fd"))

		goto cleanup;



	err = bpf_prog_test_run_opts(prog_fd, &topts);

	if (!ASSERT_OK(err, "test_run_opts err"))

		goto cleanup;



	if (!ASSERT_OK(topts.retval, "test_run_opts retval"))

		goto cleanup;



	ASSERT_EQ(skel->bss->err, 0, "err");



cleanup:

	prepare__destroy(skel);

}



void test_prepare(void)

{

	if (test__start_subtest("prepare_load"))

		test_prepare_load();

	if (test__start_subtest("prepare_no_load"))

		test_prepare_no_load();

}

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

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// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2025 Meta */

#include <vmlinux.h>

#include <bpf/bpf_helpers.h>

//#include <bpf/bpf_tracing.h>



char _license[] SEC("license") = "GPL";



int err;



struct {

	__uint(type, BPF_MAP_TYPE_RINGBUF);

	__uint(max_entries, 4096);

} ringbuf SEC(".maps");



struct {

	__uint(type, BPF_MAP_TYPE_ARRAY);

	__uint(max_entries, 1);

	__type(key, __u32);

	__type(value, __u32);

} array_map SEC(".maps");



SEC("cgroup_skb/egress")

int program(struct __sk_buff *skb)

{

	err = 0;

	return 0;

}