Commit 9271a0c7 authored by Jiri Olsa's avatar Jiri Olsa Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add attach test for bpf_program__attach_kprobe_multi_opts 



Adding tests for bpf_program__attach_kprobe_multi_opts function,
that test attach with pattern, symbols and addrs.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220316122419.933957-13-jolsa@kernel.org
parent 2c6401c9

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

+193 −11
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
#include "kprobe_multi.skel.h"

#include "trace_helpers.h"



static void kprobe_multi_test_run(struct kprobe_multi *skel)

static void kprobe_multi_test_run(struct kprobe_multi *skel, bool test_return)

{

	LIBBPF_OPTS(bpf_test_run_opts, topts);

	int err, prog_fd;
@@ -22,6 +22,7 @@ static void kprobe_multi_test_run(struct kprobe_multi *skel) 
	ASSERT_EQ(skel->bss->kprobe_test7_result, 1, "kprobe_test7_result");

	ASSERT_EQ(skel->bss->kprobe_test8_result, 1, "kprobe_test8_result");



	if (test_return) {

		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");
@@ -31,6 +32,7 @@ static void kprobe_multi_test_run(struct kprobe_multi *skel) 
		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)

{
@@ -46,7 +48,7 @@ static void test_skel_api(void) 
	if (!ASSERT_OK(err, "kprobe_multi__attach"))

		goto cleanup;



	kprobe_multi_test_run(skel);

	kprobe_multi_test_run(skel, true);



cleanup:

	kprobe_multi__destroy(skel);
@@ -73,7 +75,7 @@ static void test_link_api(struct bpf_link_create_opts *opts) 
	if (!ASSERT_GE(link2_fd, 0, "link_fd"))

		goto cleanup;



	kprobe_multi_test_run(skel);

	kprobe_multi_test_run(skel, true);



cleanup:

	if (link1_fd != -1)
@@ -127,6 +129,178 @@ static void test_link_api_syms(void) 
	test_link_api(&opts);

}



static void

test_attach_api(const char *pattern, struct bpf_kprobe_multi_opts *opts)

{

	struct bpf_link *link1 = NULL, *link2 = NULL;

	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();

	link1 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,

						      pattern, opts);

	if (!ASSERT_OK_PTR(link1, "bpf_program__attach_kprobe_multi_opts"))

		goto cleanup;



	if (opts) {

		opts->retprobe = true;

		link2 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kretprobe,

							      pattern, opts);

		if (!ASSERT_OK_PTR(link2, "bpf_program__attach_kprobe_multi_opts"))

			goto cleanup;

	}



	kprobe_multi_test_run(skel, !!opts);



cleanup:

	bpf_link__destroy(link2);

	bpf_link__destroy(link1);

	kprobe_multi__destroy(skel);

}



static void test_attach_api_pattern(void)

{

	LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);



	test_attach_api("bpf_fentry_test*", &opts);

	test_attach_api("bpf_fentry_test?", NULL);

}



static void test_attach_api_addrs(void)

{

	LIBBPF_OPTS(bpf_kprobe_multi_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.addrs = (const unsigned long *) addrs;

	opts.cnt = ARRAY_SIZE(addrs);

	test_attach_api(NULL, &opts);

}



static void test_attach_api_syms(void)

{

	LIBBPF_OPTS(bpf_kprobe_multi_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.syms = syms;

	opts.cnt = ARRAY_SIZE(syms);

	test_attach_api(NULL, &opts);

}



static void test_attach_api_fails(void)

{

	LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);

	struct kprobe_multi *skel = NULL;

	struct bpf_link *link = NULL;

	unsigned long long addrs[2];

	const char *syms[2] = {

		"bpf_fentry_test1",

		"bpf_fentry_test2",

	};

	__u64 cookies[2];



	addrs[0] = ksym_get_addr("bpf_fentry_test1");

	addrs[1] = ksym_get_addr("bpf_fentry_test2");



	if (!ASSERT_FALSE(!addrs[0] || !addrs[1], "ksym_get_addr"))

		goto cleanup;



	skel = kprobe_multi__open_and_load();

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

		goto cleanup;



	skel->bss->pid = getpid();



	/* fail_1 - pattern and opts NULL */

	link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,

						     NULL, NULL);

	if (!ASSERT_ERR_PTR(link, "fail_1"))

		goto cleanup;



	if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_1_error"))

		goto cleanup;



	/* fail_2 - both addrs and syms set */

	opts.addrs = (const unsigned long *) addrs;

	opts.syms = syms;

	opts.cnt = ARRAY_SIZE(syms);

	opts.cookies = NULL;



	link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,

						     NULL, &opts);

	if (!ASSERT_ERR_PTR(link, "fail_2"))

		goto cleanup;



	if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_2_error"))

		goto cleanup;



	/* fail_3 - pattern and addrs set */

	opts.addrs = (const unsigned long *) addrs;

	opts.syms = NULL;

	opts.cnt = ARRAY_SIZE(syms);

	opts.cookies = NULL;



	link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,

						     "ksys_*", &opts);

	if (!ASSERT_ERR_PTR(link, "fail_3"))

		goto cleanup;



	if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_3_error"))

		goto cleanup;



	/* fail_4 - pattern and cnt set */

	opts.addrs = NULL;

	opts.syms = NULL;

	opts.cnt = ARRAY_SIZE(syms);

	opts.cookies = NULL;



	link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,

						     "ksys_*", &opts);

	if (!ASSERT_ERR_PTR(link, "fail_4"))

		goto cleanup;



	if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_4_error"))

		goto cleanup;



	/* fail_5 - pattern and cookies */

	opts.addrs = NULL;

	opts.syms = NULL;

	opts.cnt = 0;

	opts.cookies = cookies;



	link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,

						     "ksys_*", &opts);

	if (!ASSERT_ERR_PTR(link, "fail_5"))

		goto cleanup;



	if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_5_error"))

		goto cleanup;



cleanup:

	bpf_link__destroy(link);

	kprobe_multi__destroy(skel);

}



void test_kprobe_multi_test(void)

{

	if (!ASSERT_OK(load_kallsyms(), "load_kallsyms"))
@@ -138,4 +312,12 @@ void test_kprobe_multi_test(void) 
		test_link_api_syms();

	if (test__start_subtest("link_api_syms"))

		test_link_api_addrs();

	if (test__start_subtest("attach_api_pattern"))

		test_attach_api_pattern();

	if (test__start_subtest("attach_api_addrs"))

		test_attach_api_addrs();

	if (test__start_subtest("attach_api_syms"))

		test_attach_api_syms();

	if (test__start_subtest("attach_api_fails"))

		test_attach_api_fails();

}