[linux-2.6-block.git] / tools / perf / tests / bpf.c

#include <errno.h>
#include <stdio.h>
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <util/util.h>
#include <util/bpf-loader.h>
#include <util/evlist.h>
#include <linux/bpf.h>
#include <linux/filter.h>
#include <linux/kernel.h>
#include <api/fs/fs.h>
#include <bpf/bpf.h>
#include "tests.h"
#include "llvm.h"
#include "debug.h"
#define NR_ITERS       111
#define PERF_TEST_BPF_PATH "/sys/fs/bpf/perf_test"

#ifdef HAVE_LIBBPF_SUPPORT

static int epoll_pwait_loop(void)
{
	int i;

	/* Should fail NR_ITERS times */
	for (i = 0; i < NR_ITERS; i++)
		epoll_pwait(-(i + 1), NULL, 0, 0, NULL);
	return 0;
}

#ifdef HAVE_BPF_PROLOGUE

static int llseek_loop(void)
{
	int fds[2], i;

	fds[0] = open("/dev/null", O_RDONLY);
	fds[1] = open("/dev/null", O_RDWR);

	if (fds[0] < 0 || fds[1] < 0)
		return -1;

	for (i = 0; i < NR_ITERS; i++) {
		lseek(fds[i % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
		lseek(fds[(i + 1) % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
	}
	close(fds[0]);
	close(fds[1]);
	return 0;
}

#endif

static struct {
	enum test_llvm__testcase prog_id;
	const char *desc;
	const char *name;
	const char *msg_compile_fail;
	const char *msg_load_fail;
	int (*target_func)(void);
	int expect_result;
	bool	pin;
} bpf_testcase_table[] = {
	{
		.prog_id	  = LLVM_TESTCASE_BASE,
		.desc		  = "Basic BPF filtering",
		.name		  = "[basic_bpf_test]",
		.msg_compile_fail = "fix 'perf test LLVM' first",
		.msg_load_fail	  = "load bpf object failed",
		.target_func	  = &epoll_pwait_loop,
		.expect_result	  = (NR_ITERS + 1) / 2,
	},
	{
		.prog_id	  = LLVM_TESTCASE_BASE,
		.desc		  = "BPF pinning",
		.name		  = "[bpf_pinning]",
		.msg_compile_fail = "fix kbuild first",
		.msg_load_fail	  = "check your vmlinux setting?",
		.target_func	  = &epoll_pwait_loop,
		.expect_result	  = (NR_ITERS + 1) / 2,
		.pin 		  = true,
	},
#ifdef HAVE_BPF_PROLOGUE
	{
		.prog_id	  = LLVM_TESTCASE_BPF_PROLOGUE,
		.desc		  = "BPF prologue generation",
		.name		  = "[bpf_prologue_test]",
		.msg_compile_fail = "fix kbuild first",
		.msg_load_fail	  = "check your vmlinux setting?",
		.target_func	  = &llseek_loop,
		.expect_result	  = (NR_ITERS + 1) / 4,
	},
#endif
	{
		.prog_id	  = LLVM_TESTCASE_BPF_RELOCATION,
		.desc		  = "BPF relocation checker",
		.name		  = "[bpf_relocation_test]",
		.msg_compile_fail = "fix 'perf test LLVM' first",
		.msg_load_fail	  = "libbpf error when dealing with relocation",
	},
};

static int do_test(struct bpf_object *obj, int (*func)(void),
		   int expect)
{
	struct record_opts opts = {
		.target = {
			.uid = UINT_MAX,
			.uses_mmap = true,
		},
		.freq	      = 0,
		.mmap_pages   = 256,
		.default_interval = 1,
	};

	char pid[16];
	char sbuf[STRERR_BUFSIZE];
	struct perf_evlist *evlist;
	int i, ret = TEST_FAIL, err = 0, count = 0;

	struct parse_events_state parse_state;
	struct parse_events_error parse_error;

	bzero(&parse_error, sizeof(parse_error));
	bzero(&parse_state, sizeof(parse_state));
	parse_state.error = &parse_error;
	INIT_LIST_HEAD(&parse_state.list);

	err = parse_events_load_bpf_obj(&parse_state, &parse_state.list, obj, NULL);
	if (err || list_empty(&parse_state.list)) {
		pr_debug("Failed to add events selected by BPF\n");
		return TEST_FAIL;
	}

	snprintf(pid, sizeof(pid), "%d", getpid());
	pid[sizeof(pid) - 1] = '\0';
	opts.target.tid = opts.target.pid = pid;

	/* Instead of perf_evlist__new_default, don't add default events */
	evlist = perf_evlist__new();
	if (!evlist) {
		pr_debug("Not enough memory to create evlist\n");
		return TEST_FAIL;
	}

	err = perf_evlist__create_maps(evlist, &opts.target);
	if (err < 0) {
		pr_debug("Not enough memory to create thread/cpu maps\n");
		goto out_delete_evlist;
	}

	perf_evlist__splice_list_tail(evlist, &parse_state.list);
	evlist->nr_groups = parse_state.nr_groups;

	perf_evlist__config(evlist, &opts, NULL);

	err = perf_evlist__open(evlist);
	if (err < 0) {
		pr_debug("perf_evlist__open: %s\n",
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	err = perf_evlist__mmap(evlist, opts.mmap_pages);
	if (err < 0) {
		pr_debug("perf_evlist__mmap: %s\n",
			 str_error_r(errno, sbuf, sizeof(sbuf)));
		goto out_delete_evlist;
	}

	perf_evlist__enable(evlist);
	(*func)();
	perf_evlist__disable(evlist);

	for (i = 0; i < evlist->nr_mmaps; i++) {
		union perf_event *event;

		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
			const u32 type = event->header.type;

			if (type == PERF_RECORD_SAMPLE)
				count ++;
		}
	}

	if (count != expect) {
		pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect, count);
		goto out_delete_evlist;
	}

	ret = TEST_OK;

out_delete_evlist:
	perf_evlist__delete(evlist);
	return ret;
}

static struct bpf_object *
prepare_bpf(void *obj_buf, size_t obj_buf_sz, const char *name)
{
	struct bpf_object *obj;

	obj = bpf__prepare_load_buffer(obj_buf, obj_buf_sz, name);
	if (IS_ERR(obj)) {
		pr_debug("Compile BPF program failed.\n");
		return NULL;
	}
	return obj;
}

static int __test__bpf(int idx)
{
	int ret;
	void *obj_buf;
	size_t obj_buf_sz;
	struct bpf_object *obj;

	ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
				       bpf_testcase_table[idx].prog_id,
				       true, NULL);
	if (ret != TEST_OK || !obj_buf || !obj_buf_sz) {
		pr_debug("Unable to get BPF object, %s\n",
			 bpf_testcase_table[idx].msg_compile_fail);
		if (idx == 0)
			return TEST_SKIP;
		else
			return TEST_FAIL;
	}

	obj = prepare_bpf(obj_buf, obj_buf_sz,
			  bpf_testcase_table[idx].name);
	if ((!!bpf_testcase_table[idx].target_func) != (!!obj)) {
		if (!obj)
			pr_debug("Fail to load BPF object: %s\n",
				 bpf_testcase_table[idx].msg_load_fail);
		else
			pr_debug("Success unexpectedly: %s\n",
				 bpf_testcase_table[idx].msg_load_fail);
		ret = TEST_FAIL;
		goto out;
	}

	if (obj) {
		ret = do_test(obj,
			      bpf_testcase_table[idx].target_func,
			      bpf_testcase_table[idx].expect_result);
		if (ret != TEST_OK)
			goto out;
		if (bpf_testcase_table[idx].pin) {
			int err;

			if (!bpf_fs__mount()) {
				pr_debug("BPF filesystem not mounted\n");
				ret = TEST_FAIL;
				goto out;
			}
			err = mkdir(PERF_TEST_BPF_PATH, 0777);
			if (err && errno != EEXIST) {
				pr_debug("Failed to make perf_test dir: %s\n",
					 strerror(errno));
				ret = TEST_FAIL;
				goto out;
			}
			if (bpf_object__pin(obj, PERF_TEST_BPF_PATH))
				ret = TEST_FAIL;
			if (rm_rf(PERF_TEST_BPF_PATH))
				ret = TEST_FAIL;
		}
	}

out:
	bpf__clear();
	return ret;
}

int test__bpf_subtest_get_nr(void)
{
	return (int)ARRAY_SIZE(bpf_testcase_table);
}

const char *test__bpf_subtest_get_desc(int i)
{
	if (i < 0 || i >= (int)ARRAY_SIZE(bpf_testcase_table))
		return NULL;
	return bpf_testcase_table[i].desc;
}

static int check_env(void)
{
	int err;
	unsigned int kver_int;
	char license[] = "GPL";

	struct bpf_insn insns[] = {
		BPF_MOV64_IMM(BPF_REG_0, 1),
		BPF_EXIT_INSN(),
	};

	err = fetch_kernel_version(&kver_int, NULL, 0);
	if (err) {
		pr_debug("Unable to get kernel version\n");
		return err;
	}

	err = bpf_load_program(BPF_PROG_TYPE_KPROBE, insns,
			       sizeof(insns) / sizeof(insns[0]),
			       license, kver_int, NULL, 0);
	if (err < 0) {
		pr_err("Missing basic BPF support, skip this test: %s\n",
		       strerror(errno));
		return err;
	}
	close(err);

	return 0;
}

int test__bpf(struct test *test __maybe_unused, int i)
{
	int err;

	if (i < 0 || i >= (int)ARRAY_SIZE(bpf_testcase_table))
		return TEST_FAIL;

	if (geteuid() != 0) {
		pr_debug("Only root can run BPF test\n");
		return TEST_SKIP;
	}

	if (check_env())
		return TEST_SKIP;

	err = __test__bpf(i);
	return err;
}

#else
int test__bpf_subtest_get_nr(void)
{
	return 0;
}

const char *test__bpf_subtest_get_desc(int i __maybe_unused)
{
	return NULL;
}

int test__bpf(struct test *test __maybe_unused, int i __maybe_unused)
{
	pr_debug("Skip BPF test because BPF support is not compiled\n");
	return TEST_SKIP;
}
#endif
Commit	Line	Data
a43783ae	1	#include <errno.h>
ba1fae43 WN	2	#include <stdio.h>
ba1fae43 WN	3	#include <sys/epoll.h>
7a8ef4c4 ACM	4	#include <sys/types.h>
7a8ef4c4 ACM	5	#include <sys/stat.h>
bafae98e	6	#include <fcntl.h>
6a7d550e	7	#include <util/util.h>
ba1fae43 WN	8	#include <util/bpf-loader.h>
ba1fae43 WN	9	#include <util/evlist.h>
6a7d550e WN	10	#include <linux/bpf.h>
6a7d550e WN	11	#include <linux/filter.h>
877a7a11	12	#include <linux/kernel.h>
a2630536	13	#include <api/fs/fs.h>
6a7d550e	14	#include <bpf/bpf.h>
ba1fae43 WN	15	#include "tests.h"
	16	#include "llvm.h"
	17	#include "debug.h"
	18	#define NR_ITERS 111
a2630536	19	#define PERF_TEST_BPF_PATH "/sys/fs/bpf/perf_test"
ba1fae43 WN	20
	21	#ifdef HAVE_LIBBPF_SUPPORT
	22
e0337f4f	23	static int epoll_pwait_loop(void)
ba1fae43 WN	24	{
	25	int i;
	26
	27	/* Should fail NR_ITERS times */
	28	for (i = 0; i < NR_ITERS; i++)
e0337f4f	29	epoll_pwait(-(i + 1), NULL, 0, 0, NULL);
ba1fae43 WN	30	return 0;
	31	}
	32
bbb7d492 WN	33	#ifdef HAVE_BPF_PROLOGUE
	34
	35	static int llseek_loop(void)
	36	{
	37	int fds[2], i;
	38
	39	fds[0] = open("/dev/null", O_RDONLY);
	40	fds[1] = open("/dev/null", O_RDWR);
	41
	42	if (fds[0] < 0 \|\| fds[1] < 0)
	43	return -1;
	44
	45	for (i = 0; i < NR_ITERS; i++) {
	46	lseek(fds[i % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
	47	lseek(fds[(i + 1) % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
	48	}
	49	close(fds[0]);
	50	close(fds[1]);
	51	return 0;
	52	}
	53
	54	#endif
	55
ba1fae43 WN	56	static struct {
	57	enum test_llvm__testcase prog_id;
	58	const char *desc;
	59	const char *name;
	60	const char *msg_compile_fail;
	61	const char *msg_load_fail;
	62	int (*target_func)(void);
	63	int expect_result;
a2630536	64	bool pin;
ba1fae43 WN	65	} bpf_testcase_table[] = {
ba1fae43 WN	66	{
13cb2d0f ACM	67	.prog_id = LLVM_TESTCASE_BASE,
	68	.desc = "Basic BPF filtering",
	69	.name = "[basic_bpf_test]",
	70	.msg_compile_fail = "fix 'perf test LLVM' first",
	71	.msg_load_fail = "load bpf object failed",
e0337f4f	72	.target_func = &epoll_pwait_loop,
13cb2d0f	73	.expect_result = (NR_ITERS + 1) / 2,
a2630536 JS	74	},
a2630536 JS	75	{
13cb2d0f ACM	76	.prog_id = LLVM_TESTCASE_BASE,
	77	.desc = "BPF pinning",
	78	.name = "[bpf_pinning]",
	79	.msg_compile_fail = "fix kbuild first",
	80	.msg_load_fail = "check your vmlinux setting?",
e0337f4f	81	.target_func = &epoll_pwait_loop,
13cb2d0f ACM	82	.expect_result = (NR_ITERS + 1) / 2,
13cb2d0f ACM	83	.pin = true,
ba1fae43	84	},
bbb7d492 WN	85	#ifdef HAVE_BPF_PROLOGUE
bbb7d492 WN	86	{
13cb2d0f ACM	87	.prog_id = LLVM_TESTCASE_BPF_PROLOGUE,
	88	.desc = "BPF prologue generation",
	89	.name = "[bpf_prologue_test]",
	90	.msg_compile_fail = "fix kbuild first",
	91	.msg_load_fail = "check your vmlinux setting?",
	92	.target_func = &llseek_loop,
	93	.expect_result = (NR_ITERS + 1) / 4,
bbb7d492 WN	94	},
bbb7d492 WN	95	#endif
7b6982ce	96	{
13cb2d0f ACM	97	.prog_id = LLVM_TESTCASE_BPF_RELOCATION,
	98	.desc = "BPF relocation checker",
	99	.name = "[bpf_relocation_test]",
	100	.msg_compile_fail = "fix 'perf test LLVM' first",
	101	.msg_load_fail = "libbpf error when dealing with relocation",
7b6982ce	102	},
ba1fae43 WN	103	};
	104
	105	static int do_test(struct bpf_object obj, int (func)(void),
	106	int expect)
	107	{
	108	struct record_opts opts = {
	109	.target = {
	110	.uid = UINT_MAX,
	111	.uses_mmap = true,
	112	},
	113	.freq = 0,
	114	.mmap_pages = 256,
	115	.default_interval = 1,
	116	};
	117
	118	char pid[16];
	119	char sbuf[STRERR_BUFSIZE];
	120	struct perf_evlist *evlist;
	121	int i, ret = TEST_FAIL, err = 0, count = 0;
	122
5d9cdc11	123	struct parse_events_state parse_state;
ba1fae43 WN	124	struct parse_events_error parse_error;
	125
	126	bzero(&parse_error, sizeof(parse_error));
5d9cdc11 ACM	127	bzero(&parse_state, sizeof(parse_state));
	128	parse_state.error = &parse_error;
	129	INIT_LIST_HEAD(&parse_state.list);
ba1fae43	130
5d9cdc11 ACM	131	err = parse_events_load_bpf_obj(&parse_state, &parse_state.list, obj, NULL);
5d9cdc11 ACM	132	if (err \|\| list_empty(&parse_state.list)) {
ba1fae43	133	pr_debug("Failed to add events selected by BPF\n");
ad0dd7ae	134	return TEST_FAIL;
ba1fae43 WN	135	}
	136
	137	snprintf(pid, sizeof(pid), "%d", getpid());
	138	pid[sizeof(pid) - 1] = '\0';
	139	opts.target.tid = opts.target.pid = pid;
	140
	141	/* Instead of perf_evlist__new_default, don't add default events */
	142	evlist = perf_evlist__new();
	143	if (!evlist) {
042cfb5f	144	pr_debug("Not enough memory to create evlist\n");
ba1fae43 WN	145	return TEST_FAIL;
	146	}
	147
	148	err = perf_evlist__create_maps(evlist, &opts.target);
	149	if (err < 0) {
	150	pr_debug("Not enough memory to create thread/cpu maps\n");
	151	goto out_delete_evlist;
	152	}
	153
5d9cdc11 ACM	154	perf_evlist__splice_list_tail(evlist, &parse_state.list);
5d9cdc11 ACM	155	evlist->nr_groups = parse_state.nr_groups;
ba1fae43	156
e68ae9cf	157	perf_evlist__config(evlist, &opts, NULL);
ba1fae43 WN	158
	159	err = perf_evlist__open(evlist);
	160	if (err < 0) {
	161	pr_debug("perf_evlist__open: %s\n",
c8b5f2c9	162	str_error_r(errno, sbuf, sizeof(sbuf)));
ba1fae43 WN	163	goto out_delete_evlist;
	164	}
	165
f74b9d3a	166	err = perf_evlist__mmap(evlist, opts.mmap_pages);
ba1fae43 WN	167	if (err < 0) {
ba1fae43 WN	168	pr_debug("perf_evlist__mmap: %s\n",
c8b5f2c9	169	str_error_r(errno, sbuf, sizeof(sbuf)));
ba1fae43 WN	170	goto out_delete_evlist;
	171	}
	172
	173	perf_evlist__enable(evlist);
	174	(*func)();
	175	perf_evlist__disable(evlist);
	176
	177	for (i = 0; i < evlist->nr_mmaps; i++) {
	178	union perf_event *event;
	179
	180	while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
	181	const u32 type = event->header.type;
	182
	183	if (type == PERF_RECORD_SAMPLE)
	184	count ++;
	185	}
	186	}
	187
ad0dd7ae	188	if (count != expect) {
6703c977	189	pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect, count);
ad0dd7ae WN	190	goto out_delete_evlist;
ad0dd7ae WN	191	}
ba1fae43 WN	192
	193	ret = TEST_OK;
	194
	195	out_delete_evlist:
	196	perf_evlist__delete(evlist);
	197	return ret;
	198	}
	199
	200	static struct bpf_object *
	201	prepare_bpf(void obj_buf, size_t obj_buf_sz, const char name)
	202	{
	203	struct bpf_object *obj;
	204
	205	obj = bpf__prepare_load_buffer(obj_buf, obj_buf_sz, name);
	206	if (IS_ERR(obj)) {
	207	pr_debug("Compile BPF program failed.\n");
	208	return NULL;
	209	}
	210	return obj;
	211	}
	212
916d4092	213	static int __test__bpf(int idx)
ba1fae43 WN	214	{
	215	int ret;
	216	void *obj_buf;
	217	size_t obj_buf_sz;
	218	struct bpf_object *obj;
	219
	220	ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
916d4092	221	bpf_testcase_table[idx].prog_id,
7b6982ce	222	true, NULL);
ba1fae43 WN	223	if (ret != TEST_OK \|\| !obj_buf \|\| !obj_buf_sz) {
ba1fae43 WN	224	pr_debug("Unable to get BPF object, %s\n",
916d4092 ACM	225	bpf_testcase_table[idx].msg_compile_fail);
916d4092 ACM	226	if (idx == 0)
ba1fae43 WN	227	return TEST_SKIP;
	228	else
	229	return TEST_FAIL;
	230	}
	231
	232	obj = prepare_bpf(obj_buf, obj_buf_sz,
916d4092	233	bpf_testcase_table[idx].name);
7b6982ce WN	234	if ((!!bpf_testcase_table[idx].target_func) != (!!obj)) {
	235	if (!obj)
	236	pr_debug("Fail to load BPF object: %s\n",
	237	bpf_testcase_table[idx].msg_load_fail);
	238	else
	239	pr_debug("Success unexpectedly: %s\n",
	240	bpf_testcase_table[idx].msg_load_fail);
ba1fae43 WN	241	ret = TEST_FAIL;
	242	goto out;
	243	}
	244
a2630536	245	if (obj) {
7b6982ce WN	246	ret = do_test(obj,
	247	bpf_testcase_table[idx].target_func,
	248	bpf_testcase_table[idx].expect_result);
a2630536 JS	249	if (ret != TEST_OK)
	250	goto out;
	251	if (bpf_testcase_table[idx].pin) {
	252	int err;
	253
	254	if (!bpf_fs__mount()) {
	255	pr_debug("BPF filesystem not mounted\n");
	256	ret = TEST_FAIL;
	257	goto out;
	258	}
	259	err = mkdir(PERF_TEST_BPF_PATH, 0777);
	260	if (err && errno != EEXIST) {
	261	pr_debug("Failed to make perf_test dir: %s\n",
	262	strerror(errno));
	263	ret = TEST_FAIL;
	264	goto out;
	265	}
	266	if (bpf_object__pin(obj, PERF_TEST_BPF_PATH))
	267	ret = TEST_FAIL;
	268	if (rm_rf(PERF_TEST_BPF_PATH))
	269	ret = TEST_FAIL;
	270	}
	271	}
	272
ba1fae43 WN	273	out:
	274	bpf__clear();
	275	return ret;
	276	}
	277
77a0cf68 WN	278	int test__bpf_subtest_get_nr(void)
	279	{
	280	return (int)ARRAY_SIZE(bpf_testcase_table);
	281	}
	282
	283	const char *test__bpf_subtest_get_desc(int i)
	284	{
	285	if (i < 0 \|\| i >= (int)ARRAY_SIZE(bpf_testcase_table))
	286	return NULL;
	287	return bpf_testcase_table[i].desc;
	288	}
	289
6a7d550e WN	290	static int check_env(void)
	291	{
	292	int err;
	293	unsigned int kver_int;
	294	char license[] = "GPL";
	295
	296	struct bpf_insn insns[] = {
	297	BPF_MOV64_IMM(BPF_REG_0, 1),
	298	BPF_EXIT_INSN(),
	299	};
	300
	301	err = fetch_kernel_version(&kver_int, NULL, 0);
	302	if (err) {
	303	pr_debug("Unable to get kernel version\n");
	304	return err;
	305	}
	306
	307	err = bpf_load_program(BPF_PROG_TYPE_KPROBE, insns,
	308	sizeof(insns) / sizeof(insns[0]),
	309	license, kver_int, NULL, 0);
	310	if (err < 0) {
	311	pr_err("Missing basic BPF support, skip this test: %s\n",
	312	strerror(errno));
	313	return err;
	314	}
	315	close(err);
	316
	317	return 0;
	318	}
	319
81f17c90	320	int test__bpf(struct test *test __maybe_unused, int i)
ba1fae43	321	{
ba1fae43 WN	322	int err;
ba1fae43 WN	323
77a0cf68 WN	324	if (i < 0 \|\| i >= (int)ARRAY_SIZE(bpf_testcase_table))
	325	return TEST_FAIL;
	326
ba1fae43 WN	327	if (geteuid() != 0) {
	328	pr_debug("Only root can run BPF test\n");
	329	return TEST_SKIP;
	330	}
	331
6a7d550e WN	332	if (check_env())
	333	return TEST_SKIP;
	334
77a0cf68 WN	335	err = __test__bpf(i);
	336	return err;
	337	}
ba1fae43	338
77a0cf68 WN	339	#else
	340	int test__bpf_subtest_get_nr(void)
	341	{
	342	return 0;
	343	}
ba1fae43	344
77a0cf68 WN	345	const char *test__bpf_subtest_get_desc(int i __maybe_unused)
	346	{
	347	return NULL;
ba1fae43 WN	348	}
ba1fae43 WN	349
81f17c90	350	int test__bpf(struct test *test __maybe_unused, int i __maybe_unused)
ba1fae43 WN	351	{
	352	pr_debug("Skip BPF test because BPF support is not compiled\n");
	353	return TEST_SKIP;
	354	}
	355	#endif