[thirdparty/linux.git] / tools / testing / selftests / bpf / prog_tests / mmap.c

// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <sys/mman.h>
#include "test_mmap.skel.h"

struct map_data {
	__u64 val[512 * 4];
};

static size_t roundup_page(size_t sz)
{
	long page_size = sysconf(_SC_PAGE_SIZE);
	return (sz + page_size - 1) / page_size * page_size;
}

void test_mmap(void)
{
	const size_t bss_sz = roundup_page(sizeof(struct test_mmap__bss));
	const size_t map_sz = roundup_page(sizeof(struct map_data));
	const int zero = 0, one = 1, two = 2, far = 1500;
	const long page_size = sysconf(_SC_PAGE_SIZE);
	int err, duration = 0, i, data_map_fd, data_map_id, tmp_fd;
	struct bpf_map *data_map, *bss_map;
	void *bss_mmaped = NULL, *map_mmaped = NULL, *tmp1, *tmp2;
	struct test_mmap__bss *bss_data;
	struct bpf_map_info map_info;
	__u32 map_info_sz = sizeof(map_info);
	struct map_data *map_data;
	struct test_mmap *skel;
	__u64 val = 0;

	skel = test_mmap__open_and_load();
	if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n"))
		return;

	bss_map = skel->maps.bss;
	data_map = skel->maps.data_map;
	data_map_fd = bpf_map__fd(data_map);

	/* get map's ID */
	memset(&map_info, 0, map_info_sz);
	err = bpf_obj_get_info_by_fd(data_map_fd, &map_info, &map_info_sz);
	if (CHECK(err, "map_get_info", "failed %d\n", errno))
		goto cleanup;
	data_map_id = map_info.id;

	/* mmap BSS map */
	bss_mmaped = mmap(NULL, bss_sz, PROT_READ | PROT_WRITE, MAP_SHARED,
			  bpf_map__fd(bss_map), 0);
	if (CHECK(bss_mmaped == MAP_FAILED, "bss_mmap",
		  ".bss mmap failed: %d\n", errno)) {
		bss_mmaped = NULL;
		goto cleanup;
	}
	/* map as R/W first */
	map_mmaped = mmap(NULL, map_sz, PROT_READ | PROT_WRITE, MAP_SHARED,
			  data_map_fd, 0);
	if (CHECK(map_mmaped == MAP_FAILED, "data_mmap",
		  "data_map mmap failed: %d\n", errno)) {
		map_mmaped = NULL;
		goto cleanup;
	}

	bss_data = bss_mmaped;
	map_data = map_mmaped;

	CHECK_FAIL(bss_data->in_val);
	CHECK_FAIL(bss_data->out_val);
	CHECK_FAIL(skel->bss->in_val);
	CHECK_FAIL(skel->bss->out_val);
	CHECK_FAIL(map_data->val[0]);
	CHECK_FAIL(map_data->val[1]);
	CHECK_FAIL(map_data->val[2]);
	CHECK_FAIL(map_data->val[far]);

	err = test_mmap__attach(skel);
	if (CHECK(err, "attach_raw_tp", "err %d\n", err))
		goto cleanup;

	bss_data->in_val = 123;
	val = 111;
	CHECK_FAIL(bpf_map_update_elem(data_map_fd, &zero, &val, 0));

	usleep(1);

	CHECK_FAIL(bss_data->in_val != 123);
	CHECK_FAIL(bss_data->out_val != 123);
	CHECK_FAIL(skel->bss->in_val != 123);
	CHECK_FAIL(skel->bss->out_val != 123);
	CHECK_FAIL(map_data->val[0] != 111);
	CHECK_FAIL(map_data->val[1] != 222);
	CHECK_FAIL(map_data->val[2] != 123);
	CHECK_FAIL(map_data->val[far] != 3 * 123);

	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &zero, &val));
	CHECK_FAIL(val != 111);
	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &one, &val));
	CHECK_FAIL(val != 222);
	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &two, &val));
	CHECK_FAIL(val != 123);
	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &far, &val));
	CHECK_FAIL(val != 3 * 123);

	/* data_map freeze should fail due to R/W mmap() */
	err = bpf_map_freeze(data_map_fd);
	if (CHECK(!err || errno != EBUSY, "no_freeze",
		  "data_map freeze succeeded: err=%d, errno=%d\n", err, errno))
		goto cleanup;

	err = mprotect(map_mmaped, map_sz, PROT_READ);
	if (CHECK(err, "mprotect_ro", "mprotect to r/o failed %d\n", errno))
		goto cleanup;

	/* unmap R/W mapping */
	err = munmap(map_mmaped, map_sz);
	map_mmaped = NULL;
	if (CHECK(err, "data_map_munmap", "data_map munmap failed: %d\n", errno))
		goto cleanup;

	/* re-map as R/O now */
	map_mmaped = mmap(NULL, map_sz, PROT_READ, MAP_SHARED, data_map_fd, 0);
	if (CHECK(map_mmaped == MAP_FAILED, "data_mmap",
		  "data_map R/O mmap failed: %d\n", errno)) {
		map_mmaped = NULL;
		goto cleanup;
	}
	err = mprotect(map_mmaped, map_sz, PROT_WRITE);
	if (CHECK(!err, "mprotect_wr", "mprotect() succeeded unexpectedly!\n"))
		goto cleanup;
	err = mprotect(map_mmaped, map_sz, PROT_EXEC);
	if (CHECK(!err, "mprotect_ex", "mprotect() succeeded unexpectedly!\n"))
		goto cleanup;
	map_data = map_mmaped;

	/* map/unmap in a loop to test ref counting */
	for (i = 0; i < 10; i++) {
		int flags = i % 2 ? PROT_READ : PROT_WRITE;
		void *p;

		p = mmap(NULL, map_sz, flags, MAP_SHARED, data_map_fd, 0);
		if (CHECK_FAIL(p == MAP_FAILED))
			goto cleanup;
		err = munmap(p, map_sz);
		if (CHECK_FAIL(err))
			goto cleanup;
	}

	/* data_map freeze should now succeed due to no R/W mapping */
	err = bpf_map_freeze(data_map_fd);
	if (CHECK(err, "freeze", "data_map freeze failed: err=%d, errno=%d\n",
		  err, errno))
		goto cleanup;

	/* mapping as R/W now should fail */
	tmp1 = mmap(NULL, map_sz, PROT_READ | PROT_WRITE, MAP_SHARED,
		    data_map_fd, 0);
	if (CHECK(tmp1 != MAP_FAILED, "data_mmap", "mmap succeeded\n")) {
		munmap(tmp1, map_sz);
		goto cleanup;
	}

	bss_data->in_val = 321;
	usleep(1);
	CHECK_FAIL(bss_data->in_val != 321);
	CHECK_FAIL(bss_data->out_val != 321);
	CHECK_FAIL(skel->bss->in_val != 321);
	CHECK_FAIL(skel->bss->out_val != 321);
	CHECK_FAIL(map_data->val[0] != 111);
	CHECK_FAIL(map_data->val[1] != 222);
	CHECK_FAIL(map_data->val[2] != 321);
	CHECK_FAIL(map_data->val[far] != 3 * 321);

	/* check some more advanced mmap() manipulations */

	/* map all but last page: pages 1-3 mapped */
	tmp1 = mmap(NULL, 3 * page_size, PROT_READ, MAP_SHARED,
			  data_map_fd, 0);
	if (CHECK(tmp1 == MAP_FAILED, "adv_mmap1", "errno %d\n", errno))
		goto cleanup;

	/* unmap second page: pages 1, 3 mapped */
	err = munmap(tmp1 + page_size, page_size);
	if (CHECK(err, "adv_mmap2", "errno %d\n", errno)) {
		munmap(tmp1, map_sz);
		goto cleanup;
	}

	/* map page 2 back */
	tmp2 = mmap(tmp1 + page_size, page_size, PROT_READ,
		    MAP_SHARED | MAP_FIXED, data_map_fd, 0);
	if (CHECK(tmp2 == MAP_FAILED, "adv_mmap3", "errno %d\n", errno)) {
		munmap(tmp1, page_size);
		munmap(tmp1 + 2*page_size, page_size);
		goto cleanup;
	}
	CHECK(tmp1 + page_size != tmp2, "adv_mmap4",
	      "tmp1: %p, tmp2: %p\n", tmp1, tmp2);

	/* re-map all 4 pages */
	tmp2 = mmap(tmp1, 4 * page_size, PROT_READ, MAP_SHARED | MAP_FIXED,
		    data_map_fd, 0);
	if (CHECK(tmp2 == MAP_FAILED, "adv_mmap5", "errno %d\n", errno)) {
		munmap(tmp1, 3 * page_size); /* unmap page 1 */
		goto cleanup;
	}
	CHECK(tmp1 != tmp2, "adv_mmap6", "tmp1: %p, tmp2: %p\n", tmp1, tmp2);

	map_data = tmp2;
	CHECK_FAIL(bss_data->in_val != 321);
	CHECK_FAIL(bss_data->out_val != 321);
	CHECK_FAIL(skel->bss->in_val != 321);
	CHECK_FAIL(skel->bss->out_val != 321);
	CHECK_FAIL(map_data->val[0] != 111);
	CHECK_FAIL(map_data->val[1] != 222);
	CHECK_FAIL(map_data->val[2] != 321);
	CHECK_FAIL(map_data->val[far] != 3 * 321);

	munmap(tmp2, 4 * page_size);

	/* map all 4 pages, but with pg_off=1 page, should fail */
	tmp1 = mmap(NULL, 4 * page_size, PROT_READ, MAP_SHARED | MAP_FIXED,
		    data_map_fd, page_size /* initial page shift */);
	if (CHECK(tmp1 != MAP_FAILED, "adv_mmap7", "unexpected success")) {
		munmap(tmp1, 4 * page_size);
		goto cleanup;
	}

	tmp1 = mmap(NULL, map_sz, PROT_READ, MAP_SHARED, data_map_fd, 0);
	if (CHECK(tmp1 == MAP_FAILED, "last_mmap", "failed %d\n", errno))
		goto cleanup;

	test_mmap__destroy(skel);
	skel = NULL;
	CHECK_FAIL(munmap(bss_mmaped, bss_sz));
	bss_mmaped = NULL;
	CHECK_FAIL(munmap(map_mmaped, map_sz));
	map_mmaped = NULL;

	/* map should be still held by active mmap */
	tmp_fd = bpf_map_get_fd_by_id(data_map_id);
	if (CHECK(tmp_fd < 0, "get_map_by_id", "failed %d\n", errno)) {
		munmap(tmp1, map_sz);
		goto cleanup;
	}
	close(tmp_fd);

	/* this should release data map finally */
	munmap(tmp1, map_sz);

	/* we need to wait for RCU grace period */
	for (i = 0; i < 10000; i++) {
		__u32 id = data_map_id - 1;
		if (bpf_map_get_next_id(id, &id) || id > data_map_id)
			break;
		usleep(1);
	}

	/* should fail to get map FD by non-existing ID */
	tmp_fd = bpf_map_get_fd_by_id(data_map_id);
	if (CHECK(tmp_fd >= 0, "get_map_by_id_after",
		  "unexpectedly succeeded %d\n", tmp_fd)) {
		close(tmp_fd);
		goto cleanup;
	}

cleanup:
	if (bss_mmaped)
		CHECK_FAIL(munmap(bss_mmaped, bss_sz));
	if (map_mmaped)
		CHECK_FAIL(munmap(map_mmaped, map_sz));
	test_mmap__destroy(skel);
}
Commit	Line	Data
5051b384 AN	1	// SPDX-License-Identifier: GPL-2.0
	2	#include <test_progs.h>
	3	#include <sys/mman.h>
dde53c1b	4	#include "test_mmap.skel.h"
5051b384 AN	5
	6	struct map_data {
	7	__u64 val[512 * 4];
	8	};
	9
5051b384 AN	10	static size_t roundup_page(size_t sz)
	11	{
	12	long page_size = sysconf(_SC_PAGE_SIZE);
	13	return (sz + page_size - 1) / page_size * page_size;
	14	}
	15
	16	void test_mmap(void)
	17	{
dde53c1b	18	const size_t bss_sz = roundup_page(sizeof(struct test_mmap__bss));
5051b384 AN	19	const size_t map_sz = roundup_page(sizeof(struct map_data));
	20	const int zero = 0, one = 1, two = 2, far = 1500;
	21	const long page_size = sysconf(_SC_PAGE_SIZE);
642c1654	22	int err, duration = 0, i, data_map_fd, data_map_id, tmp_fd;
5051b384 AN	23	struct bpf_map data_map, bss_map;
5051b384 AN	24	void bss_mmaped = NULL, map_mmaped = NULL, tmp1, tmp2;
dde53c1b	25	struct test_mmap__bss *bss_data;
642c1654 AN	26	struct bpf_map_info map_info;
642c1654 AN	27	__u32 map_info_sz = sizeof(map_info);
dde53c1b AN	28	struct map_data *map_data;
dde53c1b AN	29	struct test_mmap *skel;
5051b384 AN	30	__u64 val = 0;
5051b384 AN	31
5dc7a8b2	32	skel = test_mmap__open_and_load();
dde53c1b	33	if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n"))
5051b384	34	return;
5051b384	35
dde53c1b AN	36	bss_map = skel->maps.bss;
dde53c1b AN	37	data_map = skel->maps.data_map;
5051b384 AN	38	data_map_fd = bpf_map__fd(data_map);
5051b384 AN	39
642c1654 AN	40	/* get map's ID */
	41	memset(&map_info, 0, map_info_sz);
	42	err = bpf_obj_get_info_by_fd(data_map_fd, &map_info, &map_info_sz);
	43	if (CHECK(err, "map_get_info", "failed %d\n", errno))
	44	goto cleanup;
	45	data_map_id = map_info.id;
	46
	47	/* mmap BSS map */
5051b384 AN	48	bss_mmaped = mmap(NULL, bss_sz, PROT_READ \| PROT_WRITE, MAP_SHARED,
	49	bpf_map__fd(bss_map), 0);
	50	if (CHECK(bss_mmaped == MAP_FAILED, "bss_mmap",
	51	".bss mmap failed: %d\n", errno)) {
	52	bss_mmaped = NULL;
	53	goto cleanup;
	54	}
	55	/* map as R/W first */
	56	map_mmaped = mmap(NULL, map_sz, PROT_READ \| PROT_WRITE, MAP_SHARED,
	57	data_map_fd, 0);
	58	if (CHECK(map_mmaped == MAP_FAILED, "data_mmap",
	59	"data_map mmap failed: %d\n", errno)) {
	60	map_mmaped = NULL;
	61	goto cleanup;
	62	}
	63
	64	bss_data = bss_mmaped;
	65	map_data = map_mmaped;
	66
	67	CHECK_FAIL(bss_data->in_val);
	68	CHECK_FAIL(bss_data->out_val);
dde53c1b AN	69	CHECK_FAIL(skel->bss->in_val);
dde53c1b AN	70	CHECK_FAIL(skel->bss->out_val);
5051b384 AN	71	CHECK_FAIL(map_data->val[0]);
	72	CHECK_FAIL(map_data->val[1]);
	73	CHECK_FAIL(map_data->val[2]);
	74	CHECK_FAIL(map_data->val[far]);
	75
dde53c1b AN	76	err = test_mmap__attach(skel);
dde53c1b AN	77	if (CHECK(err, "attach_raw_tp", "err %d\n", err))
5051b384 AN	78	goto cleanup;
	79
	80	bss_data->in_val = 123;
	81	val = 111;
	82	CHECK_FAIL(bpf_map_update_elem(data_map_fd, &zero, &val, 0));
	83
	84	usleep(1);
	85
	86	CHECK_FAIL(bss_data->in_val != 123);
	87	CHECK_FAIL(bss_data->out_val != 123);
dde53c1b AN	88	CHECK_FAIL(skel->bss->in_val != 123);
dde53c1b AN	89	CHECK_FAIL(skel->bss->out_val != 123);
5051b384 AN	90	CHECK_FAIL(map_data->val[0] != 111);
	91	CHECK_FAIL(map_data->val[1] != 222);
	92	CHECK_FAIL(map_data->val[2] != 123);
	93	CHECK_FAIL(map_data->val[far] != 3 * 123);
	94
	95	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &zero, &val));
	96	CHECK_FAIL(val != 111);
	97	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &one, &val));
	98	CHECK_FAIL(val != 222);
	99	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &two, &val));
	100	CHECK_FAIL(val != 123);
	101	CHECK_FAIL(bpf_map_lookup_elem(data_map_fd, &far, &val));
	102	CHECK_FAIL(val != 3 * 123);
	103
	104	/* data_map freeze should fail due to R/W mmap() */
	105	err = bpf_map_freeze(data_map_fd);
	106	if (CHECK(!err \|\| errno != EBUSY, "no_freeze",
	107	"data_map freeze succeeded: err=%d, errno=%d\n", err, errno))
	108	goto cleanup;
	109
642c1654 AN	110	err = mprotect(map_mmaped, map_sz, PROT_READ);
	111	if (CHECK(err, "mprotect_ro", "mprotect to r/o failed %d\n", errno))
	112	goto cleanup;
	113
5051b384 AN	114	/* unmap R/W mapping */
	115	err = munmap(map_mmaped, map_sz);
	116	map_mmaped = NULL;
	117	if (CHECK(err, "data_map_munmap", "data_map munmap failed: %d\n", errno))
	118	goto cleanup;
	119
	120	/* re-map as R/O now */
	121	map_mmaped = mmap(NULL, map_sz, PROT_READ, MAP_SHARED, data_map_fd, 0);
	122	if (CHECK(map_mmaped == MAP_FAILED, "data_mmap",
	123	"data_map R/O mmap failed: %d\n", errno)) {
	124	map_mmaped = NULL;
	125	goto cleanup;
	126	}
642c1654 AN	127	err = mprotect(map_mmaped, map_sz, PROT_WRITE);
	128	if (CHECK(!err, "mprotect_wr", "mprotect() succeeded unexpectedly!\n"))
	129	goto cleanup;
	130	err = mprotect(map_mmaped, map_sz, PROT_EXEC);
	131	if (CHECK(!err, "mprotect_ex", "mprotect() succeeded unexpectedly!\n"))
	132	goto cleanup;
5051b384 AN	133	map_data = map_mmaped;
	134
	135	/* map/unmap in a loop to test ref counting */
	136	for (i = 0; i < 10; i++) {
	137	int flags = i % 2 ? PROT_READ : PROT_WRITE;
	138	void *p;
	139
	140	p = mmap(NULL, map_sz, flags, MAP_SHARED, data_map_fd, 0);
	141	if (CHECK_FAIL(p == MAP_FAILED))
	142	goto cleanup;
	143	err = munmap(p, map_sz);
	144	if (CHECK_FAIL(err))
	145	goto cleanup;
	146	}
	147
	148	/* data_map freeze should now succeed due to no R/W mapping */
	149	err = bpf_map_freeze(data_map_fd);
	150	if (CHECK(err, "freeze", "data_map freeze failed: err=%d, errno=%d\n",
	151	err, errno))
	152	goto cleanup;
	153
	154	/* mapping as R/W now should fail */
	155	tmp1 = mmap(NULL, map_sz, PROT_READ \| PROT_WRITE, MAP_SHARED,
	156	data_map_fd, 0);
	157	if (CHECK(tmp1 != MAP_FAILED, "data_mmap", "mmap succeeded\n")) {
	158	munmap(tmp1, map_sz);
	159	goto cleanup;
	160	}
	161
	162	bss_data->in_val = 321;
	163	usleep(1);
	164	CHECK_FAIL(bss_data->in_val != 321);
	165	CHECK_FAIL(bss_data->out_val != 321);
dde53c1b AN	166	CHECK_FAIL(skel->bss->in_val != 321);
dde53c1b AN	167	CHECK_FAIL(skel->bss->out_val != 321);
5051b384 AN	168	CHECK_FAIL(map_data->val[0] != 111);
	169	CHECK_FAIL(map_data->val[1] != 222);
	170	CHECK_FAIL(map_data->val[2] != 321);
	171	CHECK_FAIL(map_data->val[far] != 3 * 321);
	172
	173	/* check some more advanced mmap() manipulations */
	174
	175	/* map all but last page: pages 1-3 mapped */
	176	tmp1 = mmap(NULL, 3 * page_size, PROT_READ, MAP_SHARED,
	177	data_map_fd, 0);
	178	if (CHECK(tmp1 == MAP_FAILED, "adv_mmap1", "errno %d\n", errno))
	179	goto cleanup;
	180
	181	/* unmap second page: pages 1, 3 mapped */
	182	err = munmap(tmp1 + page_size, page_size);
	183	if (CHECK(err, "adv_mmap2", "errno %d\n", errno)) {
	184	munmap(tmp1, map_sz);
	185	goto cleanup;
	186	}
	187
	188	/* map page 2 back */
	189	tmp2 = mmap(tmp1 + page_size, page_size, PROT_READ,
	190	MAP_SHARED \| MAP_FIXED, data_map_fd, 0);
	191	if (CHECK(tmp2 == MAP_FAILED, "adv_mmap3", "errno %d\n", errno)) {
	192	munmap(tmp1, page_size);
	193	munmap(tmp1 + 2*page_size, page_size);
	194	goto cleanup;
	195	}
	196	CHECK(tmp1 + page_size != tmp2, "adv_mmap4",
	197	"tmp1: %p, tmp2: %p\n", tmp1, tmp2);
	198
	199	/* re-map all 4 pages */
	200	tmp2 = mmap(tmp1, 4 * page_size, PROT_READ, MAP_SHARED \| MAP_FIXED,
	201	data_map_fd, 0);
	202	if (CHECK(tmp2 == MAP_FAILED, "adv_mmap5", "errno %d\n", errno)) {
	203	munmap(tmp1, 3 * page_size); /* unmap page 1 */
	204	goto cleanup;
	205	}
	206	CHECK(tmp1 != tmp2, "adv_mmap6", "tmp1: %p, tmp2: %p\n", tmp1, tmp2);
	207
	208	map_data = tmp2;
	209	CHECK_FAIL(bss_data->in_val != 321);
	210	CHECK_FAIL(bss_data->out_val != 321);
dde53c1b AN	211	CHECK_FAIL(skel->bss->in_val != 321);
dde53c1b AN	212	CHECK_FAIL(skel->bss->out_val != 321);
5051b384 AN	213	CHECK_FAIL(map_data->val[0] != 111);
	214	CHECK_FAIL(map_data->val[1] != 222);
	215	CHECK_FAIL(map_data->val[2] != 321);
	216	CHECK_FAIL(map_data->val[far] != 3 * 321);
	217
	218	munmap(tmp2, 4 * page_size);
642c1654	219
333291ce AN	220	/* map all 4 pages, but with pg_off=1 page, should fail */
	221	tmp1 = mmap(NULL, 4 * page_size, PROT_READ, MAP_SHARED \| MAP_FIXED,
	222	data_map_fd, page_size /* initial page shift */);
	223	if (CHECK(tmp1 != MAP_FAILED, "adv_mmap7", "unexpected success")) {
	224	munmap(tmp1, 4 * page_size);
	225	goto cleanup;
	226	}
	227
642c1654 AN	228	tmp1 = mmap(NULL, map_sz, PROT_READ, MAP_SHARED, data_map_fd, 0);
	229	if (CHECK(tmp1 == MAP_FAILED, "last_mmap", "failed %d\n", errno))
	230	goto cleanup;
	231
	232	test_mmap__destroy(skel);
	233	skel = NULL;
	234	CHECK_FAIL(munmap(bss_mmaped, bss_sz));
	235	bss_mmaped = NULL;
	236	CHECK_FAIL(munmap(map_mmaped, map_sz));
	237	map_mmaped = NULL;
	238
	239	/* map should be still held by active mmap */
	240	tmp_fd = bpf_map_get_fd_by_id(data_map_id);
	241	if (CHECK(tmp_fd < 0, "get_map_by_id", "failed %d\n", errno)) {
	242	munmap(tmp1, map_sz);
	243	goto cleanup;
	244	}
	245	close(tmp_fd);
	246
	247	/* this should release data map finally */
	248	munmap(tmp1, map_sz);
	249
	250	/* we need to wait for RCU grace period */
	251	for (i = 0; i < 10000; i++) {
	252	__u32 id = data_map_id - 1;
	253	if (bpf_map_get_next_id(id, &id) \|\| id > data_map_id)
	254	break;
	255	usleep(1);
	256	}
	257
	258	/* should fail to get map FD by non-existing ID */
	259	tmp_fd = bpf_map_get_fd_by_id(data_map_id);
	260	if (CHECK(tmp_fd >= 0, "get_map_by_id_after",
	261	"unexpectedly succeeded %d\n", tmp_fd)) {
	262	close(tmp_fd);
	263	goto cleanup;
	264	}
	265
5051b384 AN	266	cleanup:
	267	if (bss_mmaped)
	268	CHECK_FAIL(munmap(bss_mmaped, bss_sz));
	269	if (map_mmaped)
	270	CHECK_FAIL(munmap(map_mmaped, map_sz));
dde53c1b	271	test_mmap__destroy(skel);
5051b384	272	}