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

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates.*/

#include <test_progs.h>
#include <network_helpers.h>
#include "test_ldsx_insn.skel.h"

static void test_map_val_and_probed_memory(void)
{
	struct test_ldsx_insn *skel;
	int err;

	skel = test_ldsx_insn__open();
	if (!ASSERT_OK_PTR(skel, "test_ldsx_insn__open"))
		return;

	if (skel->rodata->skip) {
		test__skip();
		goto out;
	}

	bpf_program__set_autoload(skel->progs.rdonly_map_prog, true);
	bpf_program__set_autoload(skel->progs.map_val_prog, true);
	bpf_program__set_autoload(skel->progs.test_ptr_struct_arg, true);

	err = test_ldsx_insn__load(skel);
	if (!ASSERT_OK(err, "test_ldsx_insn__load"))
		goto out;

	err = test_ldsx_insn__attach(skel);
	if (!ASSERT_OK(err, "test_ldsx_insn__attach"))
		goto out;

	ASSERT_OK(trigger_module_test_read(256), "trigger_read");

	ASSERT_EQ(skel->bss->done1, 1, "done1");
	ASSERT_EQ(skel->bss->ret1, 1, "ret1");
	ASSERT_EQ(skel->bss->done2, 1, "done2");
	ASSERT_EQ(skel->bss->ret2, 1, "ret2");
	ASSERT_EQ(skel->bss->int_member, -1, "int_member");

out:
	test_ldsx_insn__destroy(skel);
}

static void test_ctx_member_sign_ext(void)
{
	struct test_ldsx_insn *skel;
	int err, fd, cgroup_fd;
	char buf[16] = {0};
	socklen_t optlen;

	cgroup_fd = test__join_cgroup("/ldsx_test");
	if (!ASSERT_GE(cgroup_fd, 0, "join_cgroup /ldsx_test"))
		return;

	skel = test_ldsx_insn__open();
	if (!ASSERT_OK_PTR(skel, "test_ldsx_insn__open"))
		goto close_cgroup_fd;

	if (skel->rodata->skip) {
		test__skip();
		goto destroy_skel;
	}

	bpf_program__set_autoload(skel->progs._getsockopt, true);

	err = test_ldsx_insn__load(skel);
	if (!ASSERT_OK(err, "test_ldsx_insn__load"))
		goto destroy_skel;

	skel->links._getsockopt =
		bpf_program__attach_cgroup(skel->progs._getsockopt, cgroup_fd);
	if (!ASSERT_OK_PTR(skel->links._getsockopt, "getsockopt_link"))
		goto destroy_skel;

	fd = socket(AF_INET, SOCK_STREAM, 0);
	if (!ASSERT_GE(fd, 0, "socket"))
		goto destroy_skel;

	optlen = sizeof(buf);
	(void)getsockopt(fd, SOL_IP, IP_TTL, buf, &optlen);

	ASSERT_EQ(skel->bss->set_optlen, -1, "optlen");
	ASSERT_EQ(skel->bss->set_retval, -1, "retval");

	close(fd);
destroy_skel:
	test_ldsx_insn__destroy(skel);
close_cgroup_fd:
	close(cgroup_fd);
}

static void test_ctx_member_narrow_sign_ext(void)
{
	struct test_ldsx_insn *skel;
	struct __sk_buff skb = {};
	LIBBPF_OPTS(bpf_test_run_opts, topts,
		    .data_in = &pkt_v4,
		    .data_size_in = sizeof(pkt_v4),
		    .ctx_in = &skb,
		    .ctx_size_in = sizeof(skb),
	);
	int err, prog_fd;

	skel = test_ldsx_insn__open();
	if (!ASSERT_OK_PTR(skel, "test_ldsx_insn__open"))
		return;

	if (skel->rodata->skip) {
		test__skip();
		goto out;
	}

	bpf_program__set_autoload(skel->progs._tc, true);

	err = test_ldsx_insn__load(skel);
	if (!ASSERT_OK(err, "test_ldsx_insn__load"))
		goto out;

	prog_fd = bpf_program__fd(skel->progs._tc);
	err = bpf_prog_test_run_opts(prog_fd, &topts);
	ASSERT_OK(err, "test_run");

	ASSERT_EQ(skel->bss->set_mark, -2, "set_mark");

out:
	test_ldsx_insn__destroy(skel);
}

void test_ldsx_insn(void)
{
	if (test__start_subtest("map_val and probed_memory"))
		test_map_val_and_probed_memory();
	if (test__start_subtest("ctx_member_sign_ext"))
		test_ctx_member_sign_ext();
	if (test__start_subtest("ctx_member_narrow_sign_ext"))
		test_ctx_member_narrow_sign_ext();
}