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

// SPDX-License-Identifier: GPL-2.0
#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 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 = 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;
		struct perf_mmap *md;

		md = &evlist->mmap[i];
		if (perf_mmap__read_init(md) < 0)
			continue;

		while ((event = perf_mmap__read_event(md)) != NULL) {
			const u32 type = event->header.type;

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

	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:
	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
5875cf4c	1	// SPDX-License-Identifier: GPL-2.0
a43783ae	2	#include <errno.h>
ba1fae43 WN	3	#include <stdio.h>
ba1fae43 WN	4	#include <sys/epoll.h>
7a8ef4c4 ACM	5	#include <sys/types.h>
7a8ef4c4 ACM	6	#include <sys/stat.h>
bafae98e	7	#include <fcntl.h>
6a7d550e	8	#include <util/util.h>
ba1fae43 WN	9	#include <util/bpf-loader.h>
ba1fae43 WN	10	#include <util/evlist.h>
6a7d550e WN	11	#include <linux/bpf.h>
6a7d550e WN	12	#include <linux/filter.h>
877a7a11	13	#include <linux/kernel.h>
a2630536	14	#include <api/fs/fs.h>
6a7d550e	15	#include <bpf/bpf.h>
ba1fae43 WN	16	#include "tests.h"
	17	#include "llvm.h"
	18	#include "debug.h"
	19	#define NR_ITERS 111
a2630536	20	#define PERF_TEST_BPF_PATH "/sys/fs/bpf/perf_test"
ba1fae43 WN	21
	22	#ifdef HAVE_LIBBPF_SUPPORT
	23
e0337f4f	24	static int epoll_pwait_loop(void)
ba1fae43 WN	25	{
	26	int i;
	27
	28	/* Should fail NR_ITERS times */
	29	for (i = 0; i < NR_ITERS; i++)
e0337f4f	30	epoll_pwait(-(i + 1), NULL, 0, 0, NULL);
ba1fae43 WN	31	return 0;
	32	}
	33
bbb7d492 WN	34	#ifdef HAVE_BPF_PROLOGUE
	35
	36	static int llseek_loop(void)
	37	{
	38	int fds[2], i;
	39
	40	fds[0] = open("/dev/null", O_RDONLY);
	41	fds[1] = open("/dev/null", O_RDWR);
	42
	43	if (fds[0] < 0 \|\| fds[1] < 0)
	44	return -1;
	45
	46	for (i = 0; i < NR_ITERS; i++) {
	47	lseek(fds[i % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
	48	lseek(fds[(i + 1) % 2], i, (i / 2) % 2 ? SEEK_CUR : SEEK_SET);
	49	}
	50	close(fds[0]);
	51	close(fds[1]);
	52	return 0;
	53	}
	54
	55	#endif
	56
ba1fae43 WN	57	static struct {
	58	enum test_llvm__testcase prog_id;
	59	const char *desc;
	60	const char *name;
	61	const char *msg_compile_fail;
	62	const char *msg_load_fail;
	63	int (*target_func)(void);
	64	int expect_result;
a2630536	65	bool pin;
ba1fae43 WN	66	} bpf_testcase_table[] = {
ba1fae43 WN	67	{
13cb2d0f ACM	68	.prog_id = LLVM_TESTCASE_BASE,
	69	.desc = "Basic BPF filtering",
	70	.name = "[basic_bpf_test]",
	71	.msg_compile_fail = "fix 'perf test LLVM' first",
	72	.msg_load_fail = "load bpf object failed",
e0337f4f	73	.target_func = &epoll_pwait_loop,
13cb2d0f	74	.expect_result = (NR_ITERS + 1) / 2,
a2630536 JS	75	},
a2630536 JS	76	{
13cb2d0f ACM	77	.prog_id = LLVM_TESTCASE_BASE,
	78	.desc = "BPF pinning",
	79	.name = "[bpf_pinning]",
	80	.msg_compile_fail = "fix kbuild first",
	81	.msg_load_fail = "check your vmlinux setting?",
e0337f4f	82	.target_func = &epoll_pwait_loop,
13cb2d0f ACM	83	.expect_result = (NR_ITERS + 1) / 2,
13cb2d0f ACM	84	.pin = true,
ba1fae43	85	},
bbb7d492 WN	86	#ifdef HAVE_BPF_PROLOGUE
bbb7d492 WN	87	{
13cb2d0f ACM	88	.prog_id = LLVM_TESTCASE_BPF_PROLOGUE,
	89	.desc = "BPF prologue generation",
	90	.name = "[bpf_prologue_test]",
	91	.msg_compile_fail = "fix kbuild first",
	92	.msg_load_fail = "check your vmlinux setting?",
	93	.target_func = &llseek_loop,
	94	.expect_result = (NR_ITERS + 1) / 4,
bbb7d492 WN	95	},
bbb7d492 WN	96	#endif
7b6982ce	97	{
13cb2d0f ACM	98	.prog_id = LLVM_TESTCASE_BPF_RELOCATION,
	99	.desc = "BPF relocation checker",
	100	.name = "[bpf_relocation_test]",
	101	.msg_compile_fail = "fix 'perf test LLVM' first",
	102	.msg_load_fail = "libbpf error when dealing with relocation",
7b6982ce	103	},
ba1fae43 WN	104	};
	105
	106	static int do_test(struct bpf_object obj, int (func)(void),
	107	int expect)
	108	{
	109	struct record_opts opts = {
	110	.target = {
	111	.uid = UINT_MAX,
	112	.uses_mmap = true,
	113	},
	114	.freq = 0,
	115	.mmap_pages = 256,
	116	.default_interval = 1,
	117	};
	118
	119	char pid[16];
	120	char sbuf[STRERR_BUFSIZE];
63503dba	121	struct evlist *evlist;
ba1fae43 WN	122	int i, ret = TEST_FAIL, err = 0, count = 0;
ba1fae43 WN	123
5d9cdc11	124	struct parse_events_state parse_state;
ba1fae43 WN	125	struct parse_events_error parse_error;
	126
	127	bzero(&parse_error, sizeof(parse_error));
5d9cdc11 ACM	128	bzero(&parse_state, sizeof(parse_state));
	129	parse_state.error = &parse_error;
	130	INIT_LIST_HEAD(&parse_state.list);
ba1fae43	131
5d9cdc11 ACM	132	err = parse_events_load_bpf_obj(&parse_state, &parse_state.list, obj, NULL);
5d9cdc11 ACM	133	if (err \|\| list_empty(&parse_state.list)) {
ba1fae43	134	pr_debug("Failed to add events selected by BPF\n");
ad0dd7ae	135	return TEST_FAIL;
ba1fae43 WN	136	}
	137
	138	snprintf(pid, sizeof(pid), "%d", getpid());
	139	pid[sizeof(pid) - 1] = '\0';
	140	opts.target.tid = opts.target.pid = pid;
	141
	142	/* Instead of perf_evlist__new_default, don't add default events */
0f98b11c	143	evlist = evlist__new();
ba1fae43	144	if (!evlist) {
042cfb5f	145	pr_debug("Not enough memory to create evlist\n");
ba1fae43 WN	146	return TEST_FAIL;
	147	}
	148
	149	err = perf_evlist__create_maps(evlist, &opts.target);
	150	if (err < 0) {
	151	pr_debug("Not enough memory to create thread/cpu maps\n");
	152	goto out_delete_evlist;
	153	}
	154
5d9cdc11 ACM	155	perf_evlist__splice_list_tail(evlist, &parse_state.list);
5d9cdc11 ACM	156	evlist->nr_groups = parse_state.nr_groups;
ba1fae43	157
e68ae9cf	158	perf_evlist__config(evlist, &opts, NULL);
ba1fae43 WN	159
	160	err = perf_evlist__open(evlist);
	161	if (err < 0) {
	162	pr_debug("perf_evlist__open: %s\n",
c8b5f2c9	163	str_error_r(errno, sbuf, sizeof(sbuf)));
ba1fae43 WN	164	goto out_delete_evlist;
	165	}
	166
f74b9d3a	167	err = perf_evlist__mmap(evlist, opts.mmap_pages);
ba1fae43 WN	168	if (err < 0) {
ba1fae43 WN	169	pr_debug("perf_evlist__mmap: %s\n",
c8b5f2c9	170	str_error_r(errno, sbuf, sizeof(sbuf)));
ba1fae43 WN	171	goto out_delete_evlist;
	172	}
	173
	174	perf_evlist__enable(evlist);
	175	(*func)();
	176	perf_evlist__disable(evlist);
	177
	178	for (i = 0; i < evlist->nr_mmaps; i++) {
	179	union perf_event *event;
2f54f3a4	180	struct perf_mmap *md;
ba1fae43	181
2f54f3a4	182	md = &evlist->mmap[i];
b9bae2c8	183	if (perf_mmap__read_init(md) < 0)
2f54f3a4 KL	184	continue;
2f54f3a4 KL	185
0019dc87	186	while ((event = perf_mmap__read_event(md)) != NULL) {
ba1fae43 WN	187	const u32 type = event->header.type;
	188
	189	if (type == PERF_RECORD_SAMPLE)
	190	count ++;
	191	}
2f54f3a4	192	perf_mmap__read_done(md);
ba1fae43 WN	193	}
ba1fae43 WN	194
ad0dd7ae	195	if (count != expect) {
6703c977	196	pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect, count);
ad0dd7ae WN	197	goto out_delete_evlist;
ad0dd7ae WN	198	}
ba1fae43 WN	199
	200	ret = TEST_OK;
	201
	202	out_delete_evlist:
c12995a5	203	evlist__delete(evlist);
ba1fae43 WN	204	return ret;
	205	}
	206
	207	static struct bpf_object *
	208	prepare_bpf(void obj_buf, size_t obj_buf_sz, const char name)
	209	{
	210	struct bpf_object *obj;
	211
	212	obj = bpf__prepare_load_buffer(obj_buf, obj_buf_sz, name);
	213	if (IS_ERR(obj)) {
	214	pr_debug("Compile BPF program failed.\n");
	215	return NULL;
	216	}
	217	return obj;
	218	}
	219
916d4092	220	static int __test__bpf(int idx)
ba1fae43 WN	221	{
	222	int ret;
	223	void *obj_buf;
	224	size_t obj_buf_sz;
	225	struct bpf_object *obj;
	226
	227	ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
916d4092	228	bpf_testcase_table[idx].prog_id,
7b6982ce	229	true, NULL);
ba1fae43 WN	230	if (ret != TEST_OK \|\| !obj_buf \|\| !obj_buf_sz) {
ba1fae43 WN	231	pr_debug("Unable to get BPF object, %s\n",
916d4092 ACM	232	bpf_testcase_table[idx].msg_compile_fail);
916d4092 ACM	233	if (idx == 0)
ba1fae43 WN	234	return TEST_SKIP;
	235	else
	236	return TEST_FAIL;
	237	}
	238
	239	obj = prepare_bpf(obj_buf, obj_buf_sz,
916d4092	240	bpf_testcase_table[idx].name);
7b6982ce WN	241	if ((!!bpf_testcase_table[idx].target_func) != (!!obj)) {
	242	if (!obj)
	243	pr_debug("Fail to load BPF object: %s\n",
	244	bpf_testcase_table[idx].msg_load_fail);
	245	else
	246	pr_debug("Success unexpectedly: %s\n",
	247	bpf_testcase_table[idx].msg_load_fail);
ba1fae43 WN	248	ret = TEST_FAIL;
	249	goto out;
	250	}
	251
a2630536	252	if (obj) {
7b6982ce WN	253	ret = do_test(obj,
	254	bpf_testcase_table[idx].target_func,
	255	bpf_testcase_table[idx].expect_result);
a2630536 JS	256	if (ret != TEST_OK)
	257	goto out;
	258	if (bpf_testcase_table[idx].pin) {
	259	int err;
	260
	261	if (!bpf_fs__mount()) {
	262	pr_debug("BPF filesystem not mounted\n");
	263	ret = TEST_FAIL;
	264	goto out;
	265	}
	266	err = mkdir(PERF_TEST_BPF_PATH, 0777);
	267	if (err && errno != EEXIST) {
	268	pr_debug("Failed to make perf_test dir: %s\n",
	269	strerror(errno));
	270	ret = TEST_FAIL;
	271	goto out;
	272	}
	273	if (bpf_object__pin(obj, PERF_TEST_BPF_PATH))
	274	ret = TEST_FAIL;
	275	if (rm_rf(PERF_TEST_BPF_PATH))
	276	ret = TEST_FAIL;
	277	}
	278	}
	279
ba1fae43 WN	280	out:
	281	bpf__clear();
	282	return ret;
	283	}
	284
77a0cf68 WN	285	int test__bpf_subtest_get_nr(void)
	286	{
	287	return (int)ARRAY_SIZE(bpf_testcase_table);
	288	}
	289
	290	const char *test__bpf_subtest_get_desc(int i)
	291	{
	292	if (i < 0 \|\| i >= (int)ARRAY_SIZE(bpf_testcase_table))
	293	return NULL;
	294	return bpf_testcase_table[i].desc;
	295	}
	296
6a7d550e WN	297	static int check_env(void)
	298	{
	299	int err;
	300	unsigned int kver_int;
	301	char license[] = "GPL";
	302
	303	struct bpf_insn insns[] = {
	304	BPF_MOV64_IMM(BPF_REG_0, 1),
	305	BPF_EXIT_INSN(),
	306	};
	307
	308	err = fetch_kernel_version(&kver_int, NULL, 0);
	309	if (err) {
	310	pr_debug("Unable to get kernel version\n");
	311	return err;
	312	}
	313
	314	err = bpf_load_program(BPF_PROG_TYPE_KPROBE, insns,
	315	sizeof(insns) / sizeof(insns[0]),
	316	license, kver_int, NULL, 0);
	317	if (err < 0) {
	318	pr_err("Missing basic BPF support, skip this test: %s\n",
	319	strerror(errno));
	320	return err;
	321	}
	322	close(err);
	323
	324	return 0;
	325	}
	326
81f17c90	327	int test__bpf(struct test *test __maybe_unused, int i)
ba1fae43	328	{
ba1fae43 WN	329	int err;
ba1fae43 WN	330
77a0cf68 WN	331	if (i < 0 \|\| i >= (int)ARRAY_SIZE(bpf_testcase_table))
	332	return TEST_FAIL;
	333
ba1fae43 WN	334	if (geteuid() != 0) {
	335	pr_debug("Only root can run BPF test\n");
	336	return TEST_SKIP;
	337	}
	338
6a7d550e WN	339	if (check_env())
	340	return TEST_SKIP;
	341
77a0cf68 WN	342	err = __test__bpf(i);
	343	return err;
	344	}
ba1fae43	345
77a0cf68 WN	346	#else
	347	int test__bpf_subtest_get_nr(void)
	348	{
	349	return 0;
	350	}
ba1fae43	351
77a0cf68 WN	352	const char *test__bpf_subtest_get_desc(int i __maybe_unused)
	353	{
	354	return NULL;
ba1fae43 WN	355	}
ba1fae43 WN	356
81f17c90	357	int test__bpf(struct test *test __maybe_unused, int i __maybe_unused)
ba1fae43 WN	358	{
	359	pr_debug("Skip BPF test because BPF support is not compiled\n");
	360	return TEST_SKIP;
	361	}
	362	#endif