linux-stable/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c

// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "kprobe_multi.skel.h"
#include "trace_helpers.h"

static void kprobe_multi_test_run(struct kprobe_multi *skel)
{
	LIBBPF_OPTS(bpf_test_run_opts, topts);
	int err, prog_fd;

	prog_fd = bpf_program__fd(skel->progs.trigger);
	err = bpf_prog_test_run_opts(prog_fd, &topts);
	ASSERT_OK(err, "test_run");
	ASSERT_EQ(topts.retval, 0, "test_run");

	ASSERT_EQ(skel->bss->kprobe_test1_result, 1, "kprobe_test1_result");
	ASSERT_EQ(skel->bss->kprobe_test2_result, 1, "kprobe_test2_result");
	ASSERT_EQ(skel->bss->kprobe_test3_result, 1, "kprobe_test3_result");
	ASSERT_EQ(skel->bss->kprobe_test4_result, 1, "kprobe_test4_result");
	ASSERT_EQ(skel->bss->kprobe_test5_result, 1, "kprobe_test5_result");
	ASSERT_EQ(skel->bss->kprobe_test6_result, 1, "kprobe_test6_result");
	ASSERT_EQ(skel->bss->kprobe_test7_result, 1, "kprobe_test7_result");
	ASSERT_EQ(skel->bss->kprobe_test8_result, 1, "kprobe_test8_result");

	ASSERT_EQ(skel->bss->kretprobe_test1_result, 1, "kretprobe_test1_result");
	ASSERT_EQ(skel->bss->kretprobe_test2_result, 1, "kretprobe_test2_result");
	ASSERT_EQ(skel->bss->kretprobe_test3_result, 1, "kretprobe_test3_result");
	ASSERT_EQ(skel->bss->kretprobe_test4_result, 1, "kretprobe_test4_result");
	ASSERT_EQ(skel->bss->kretprobe_test5_result, 1, "kretprobe_test5_result");
	ASSERT_EQ(skel->bss->kretprobe_test6_result, 1, "kretprobe_test6_result");
	ASSERT_EQ(skel->bss->kretprobe_test7_result, 1, "kretprobe_test7_result");
	ASSERT_EQ(skel->bss->kretprobe_test8_result, 1, "kretprobe_test8_result");
}

static void test_skel_api(void)
{
	struct kprobe_multi *skel = NULL;
	int err;

	skel = kprobe_multi__open_and_load();
	if (!ASSERT_OK_PTR(skel, "kprobe_multi__open_and_load"))
		goto cleanup;

	skel->bss->pid = getpid();
	err = kprobe_multi__attach(skel);
	if (!ASSERT_OK(err, "kprobe_multi__attach"))
		goto cleanup;

	kprobe_multi_test_run(skel);

cleanup:
	kprobe_multi__destroy(skel);
}

static void test_link_api(struct bpf_link_create_opts *opts)
{
	int prog_fd, link1_fd = -1, link2_fd = -1;
	struct kprobe_multi *skel = NULL;

	skel = kprobe_multi__open_and_load();
	if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load"))
		goto cleanup;

	skel->bss->pid = getpid();
	prog_fd = bpf_program__fd(skel->progs.test_kprobe);
	link1_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts);
	if (!ASSERT_GE(link1_fd, 0, "link_fd"))
		goto cleanup;

	opts->kprobe_multi.flags = BPF_F_KPROBE_MULTI_RETURN;
	prog_fd = bpf_program__fd(skel->progs.test_kretprobe);
	link2_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts);
	if (!ASSERT_GE(link2_fd, 0, "link_fd"))
		goto cleanup;

	kprobe_multi_test_run(skel);

cleanup:
	if (link1_fd != -1)
		close(link1_fd);
	if (link2_fd != -1)
		close(link2_fd);
	kprobe_multi__destroy(skel);
}

#define GET_ADDR(__sym, __addr) ({					\
	__addr = ksym_get_addr(__sym);					\
	if (!ASSERT_NEQ(__addr, 0, "kallsyms load failed for " #__sym))	\
		return;							\
})

static void test_link_api_addrs(void)
{
	LIBBPF_OPTS(bpf_link_create_opts, opts);
	unsigned long long addrs[8];

	GET_ADDR("bpf_fentry_test1", addrs[0]);
	GET_ADDR("bpf_fentry_test2", addrs[1]);
	GET_ADDR("bpf_fentry_test3", addrs[2]);
	GET_ADDR("bpf_fentry_test4", addrs[3]);
	GET_ADDR("bpf_fentry_test5", addrs[4]);
	GET_ADDR("bpf_fentry_test6", addrs[5]);
	GET_ADDR("bpf_fentry_test7", addrs[6]);
	GET_ADDR("bpf_fentry_test8", addrs[7]);

	opts.kprobe_multi.addrs = (const unsigned long*) addrs;
	opts.kprobe_multi.cnt = ARRAY_SIZE(addrs);
	test_link_api(&opts);
}

static void test_link_api_syms(void)
{
	LIBBPF_OPTS(bpf_link_create_opts, opts);
	const char *syms[8] = {
		"bpf_fentry_test1",
		"bpf_fentry_test2",
		"bpf_fentry_test3",
		"bpf_fentry_test4",
		"bpf_fentry_test5",
		"bpf_fentry_test6",
		"bpf_fentry_test7",
		"bpf_fentry_test8",
	};

	opts.kprobe_multi.syms = syms;
	opts.kprobe_multi.cnt = ARRAY_SIZE(syms);
	test_link_api(&opts);
}

void test_kprobe_multi_test(void)
{
	if (!ASSERT_OK(load_kallsyms(), "load_kallsyms"))
		return;

	if (test__start_subtest("skel_api"))
		test_skel_api();
	if (test__start_subtest("link_api_addrs"))
		test_link_api_syms();
	if (test__start_subtest("link_api_syms"))
		test_link_api_addrs();
}