1 // SPDX-License-Identifier: GPL-2.0-only
2 /* I/O iterator tests.  This can only test kernel-backed iterator types.
34 	{ -1 }
79 	int i;  in iov_kunit_load_kvec()  local
81 	for (i = 0; i < kvmax; i++, pr++) {  in iov_kunit_load_kvec()
82 		if (pr->from < 0)  in iov_kunit_load_kvec()
84 		KUNIT_ASSERT_GE(test, pr->to, pr->from);  in iov_kunit_load_kvec()
85 		KUNIT_ASSERT_LE(test, pr->to, bufsize);  in iov_kunit_load_kvec()
86 		kvec[i].iov_base = buffer + pr->from;  in iov_kunit_load_kvec()
87 		kvec[i].iov_len = pr->to - pr->from;  in iov_kunit_load_kvec()
88 		size += pr->to - pr->from;  in iov_kunit_load_kvec()
92 	iov_iter_kvec(iter, dir, kvec, i, size);  in iov_kunit_load_kvec()
96  * Test copying to a ITER_KVEC-type iterator.
106 	int i, patt;  in iov_kunit_copy_to_kvec()  local
112 	for (i = 0; i < bufsize; i++)  in iov_kunit_copy_to_kvec()
113 		scratch[i] = pattern(i);  in iov_kunit_copy_to_kvec()
131 	for (pr = kvec_test_ranges; pr->from >= 0; pr++)  in iov_kunit_copy_to_kvec()
132 		for (i = pr->from; i < pr->to; i++)  in iov_kunit_copy_to_kvec()
133 			scratch[i] = pattern(patt++);  in iov_kunit_copy_to_kvec()
136 	for (i = 0; i < bufsize; i++) {  in iov_kunit_copy_to_kvec()
137 		KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);  in iov_kunit_copy_to_kvec()
138 		if (buffer[i] != scratch[i])  in iov_kunit_copy_to_kvec()
146  * Test copying from a ITER_KVEC-type iterator.
156 	int i, j;  in iov_kunit_copy_from_kvec()  local
162 	for (i = 0; i < bufsize; i++)  in iov_kunit_copy_from_kvec()
163 		buffer[i] = pattern(i);  in iov_kunit_copy_from_kvec()
179 	i = 0;  in iov_kunit_copy_from_kvec()
181 	for (pr = kvec_test_ranges; pr->from >= 0; pr++) {  in iov_kunit_copy_from_kvec()
182 		for (j = pr->from; j < pr->to; j++) {  in iov_kunit_copy_from_kvec()
183 			buffer[i++] = pattern(j);  in iov_kunit_copy_from_kvec()
184 			if (i >= bufsize)  in iov_kunit_copy_from_kvec()
191 	for (i = 0; i < bufsize; i++) {  in iov_kunit_copy_from_kvec()
192 		KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i);  in iov_kunit_copy_from_kvec()
193 		if (scratch[i] != buffer[i])  in iov_kunit_copy_from_kvec()
213 	{ -1, -1, -1 }
225 	int i;  in iov_kunit_load_bvec()  local
227 	for (i = 0; i < bvmax; i++, pr++) {  in iov_kunit_load_bvec()
228 		if (pr->from < 0)  in iov_kunit_load_bvec()
230 		KUNIT_ASSERT_LT(test, pr->page, npages);  in iov_kunit_load_bvec()
231 		KUNIT_ASSERT_LT(test, pr->page * PAGE_SIZE, bufsize);  in iov_kunit_load_bvec()
232 		KUNIT_ASSERT_GE(test, pr->from, 0);  in iov_kunit_load_bvec()
233 		KUNIT_ASSERT_GE(test, pr->to, pr->from);  in iov_kunit_load_bvec()
234 		KUNIT_ASSERT_LE(test, pr->to, PAGE_SIZE);  in iov_kunit_load_bvec()
236 		page = pages[pr->page];  in iov_kunit_load_bvec()
237 		if (pr->from == 0 && pr->from != pr->to && page == can_merge) {  in iov_kunit_load_bvec()
238 			i--;  in iov_kunit_load_bvec()
239 			bvec[i].bv_len += pr->to;  in iov_kunit_load_bvec()
241 			bvec_set_page(&bvec[i], page, pr->to - pr->from, pr->from);  in iov_kunit_load_bvec()
244 		size += pr->to - pr->from;  in iov_kunit_load_bvec()
245 		if ((pr->to & ~PAGE_MASK) == 0)  in iov_kunit_load_bvec()
246 			can_merge = page + pr->to / PAGE_SIZE;  in iov_kunit_load_bvec()
251 	iov_iter_bvec(iter, dir, bvec, i, size);  in iov_kunit_load_bvec()
255  * Test copying to a ITER_BVEC-type iterator.
265 	int i, b, patt;  in iov_kunit_copy_to_bvec()  local
271 	for (i = 0; i < bufsize; i++)  in iov_kunit_copy_to_bvec()
272 		scratch[i] = pattern(i);  in iov_kunit_copy_to_bvec()
291 	for (pr = bvec_test_ranges; pr->from >= 0; pr++, b++) {  in iov_kunit_copy_to_bvec()
292 		u8 *p = scratch + pr->page * PAGE_SIZE;  in iov_kunit_copy_to_bvec()
294 		for (i = pr->from; i < pr->to; i++)  in iov_kunit_copy_to_bvec()
295 			p[i] = pattern(patt++);  in iov_kunit_copy_to_bvec()
299 	for (i = 0; i < bufsize; i++) {  in iov_kunit_copy_to_bvec()
300 		KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);  in iov_kunit_copy_to_bvec()
301 		if (buffer[i] != scratch[i])  in iov_kunit_copy_to_bvec()
309  * Test copying from a ITER_BVEC-type iterator.
319 	int i, j;  in iov_kunit_copy_from_bvec()  local
325 	for (i = 0; i < bufsize; i++)  in iov_kunit_copy_from_bvec()
326 		buffer[i] = pattern(i);  in iov_kunit_copy_from_bvec()
342 	i = 0;  in iov_kunit_copy_from_bvec()
344 	for (pr = bvec_test_ranges; pr->from >= 0; pr++) {  in iov_kunit_copy_from_bvec()
345 		size_t patt = pr->page * PAGE_SIZE;  in iov_kunit_copy_from_bvec()
347 		for (j = pr->from; j < pr->to; j++) {  in iov_kunit_copy_from_bvec()
348 			buffer[i++] = pattern(patt + j);  in iov_kunit_copy_from_bvec()
349 			if (i >= bufsize)  in iov_kunit_copy_from_bvec()
356 	for (i = 0; i < bufsize; i++) {  in iov_kunit_copy_from_bvec()
357 		KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i);  in iov_kunit_copy_from_bvec()
358 		if (scratch[i] != buffer[i])  in iov_kunit_copy_from_bvec()
379 	int i;  in iov_kunit_load_xarray()  local
381 	for (i = 0; i < npages; i++) {  in iov_kunit_load_xarray()
382 		void *x = xa_store(xarray, i, pages[i], GFP_KERNEL);  in iov_kunit_load_xarray()
402  * Test copying to a ITER_XARRAY-type iterator.
412 	int i, patt;  in iov_kunit_copy_to_xarray()  local
420 	for (i = 0; i < bufsize; i++)  in iov_kunit_copy_to_xarray()
421 		scratch[i] = pattern(i);  in iov_kunit_copy_to_xarray()
428 	i = 0;  in iov_kunit_copy_to_xarray()
429 	for (pr = kvec_test_ranges; pr->from >= 0; pr++) {  in iov_kunit_copy_to_xarray()
430 		size = pr->to - pr->from;  in iov_kunit_copy_to_xarray()
431 		KUNIT_ASSERT_LE(test, pr->to, bufsize);  in iov_kunit_copy_to_xarray()
433 		iov_iter_xarray(&iter, READ, xarray, pr->from, size);  in iov_kunit_copy_to_xarray()
434 		copied = copy_to_iter(scratch + i, size, &iter);  in iov_kunit_copy_to_xarray()
439 		i += size;  in iov_kunit_copy_to_xarray()
445 	for (pr = kvec_test_ranges; pr->from >= 0; pr++)  in iov_kunit_copy_to_xarray()
446 		for (i = pr->from; i < pr->to; i++)  in iov_kunit_copy_to_xarray()
447 			scratch[i] = pattern(patt++);  in iov_kunit_copy_to_xarray()
450 	for (i = 0; i < bufsize; i++) {  in iov_kunit_copy_to_xarray()
451 		KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);  in iov_kunit_copy_to_xarray()
452 		if (buffer[i] != scratch[i])  in iov_kunit_copy_to_xarray()
460  * Test copying from a ITER_XARRAY-type iterator.
470 	int i, j;  in iov_kunit_copy_from_xarray()  local
478 	for (i = 0; i < bufsize; i++)  in iov_kunit_copy_from_xarray()
479 		buffer[i] = pattern(i);  in iov_kunit_copy_from_xarray()
486 	i = 0;  in iov_kunit_copy_from_xarray()
487 	for (pr = kvec_test_ranges; pr->from >= 0; pr++) {  in iov_kunit_copy_from_xarray()
488 		size = pr->to - pr->from;  in iov_kunit_copy_from_xarray()
489 		KUNIT_ASSERT_LE(test, pr->to, bufsize);  in iov_kunit_copy_from_xarray()
491 		iov_iter_xarray(&iter, WRITE, xarray, pr->from, size);  in iov_kunit_copy_from_xarray()
492 		copied = copy_from_iter(scratch + i, size, &iter);  in iov_kunit_copy_from_xarray()
497 		i += size;  in iov_kunit_copy_from_xarray()
501 	i = 0;  in iov_kunit_copy_from_xarray()
503 	for (pr = kvec_test_ranges; pr->from >= 0; pr++) {  in iov_kunit_copy_from_xarray()
504 		for (j = pr->from; j < pr->to; j++) {  in iov_kunit_copy_from_xarray()
505 			buffer[i++] = pattern(j);  in iov_kunit_copy_from_xarray()
506 			if (i >= bufsize)  in iov_kunit_copy_from_xarray()
513 	for (i = 0; i < bufsize; i++) {  in iov_kunit_copy_from_xarray()
514 		KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i);  in iov_kunit_copy_from_xarray()
515 		if (scratch[i] != buffer[i])  in iov_kunit_copy_from_xarray()
523  * Test the extraction of ITER_KVEC-type iterators.
534 	int i, from;  in iov_kunit_extract_pages_kvec()  local
546 	from = pr->from;  in iov_kunit_extract_pages_kvec()
550 		for (i = 0; i < ARRAY_SIZE(pagelist); i++)  in iov_kunit_extract_pages_kvec()
551 			pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;  in iov_kunit_extract_pages_kvec()
561 		KUNIT_EXPECT_EQ(test, iter.count, size - len);  in iov_kunit_extract_pages_kvec()
562 		size -= len;  in iov_kunit_extract_pages_kvec()
567 		for (i = 0; i < ARRAY_SIZE(pagelist); i++) {  in iov_kunit_extract_pages_kvec()
569 			ssize_t part = min_t(ssize_t, len, PAGE_SIZE - offset0);  in iov_kunit_extract_pages_kvec()
573 			while (from == pr->to) {  in iov_kunit_extract_pages_kvec()
575 				from = pr->from;  in iov_kunit_extract_pages_kvec()
582 			KUNIT_EXPECT_PTR_EQ(test, pagelist[i], p);  in iov_kunit_extract_pages_kvec()
585 			len -= part;  in iov_kunit_extract_pages_kvec()
592 		if (test->status == KUNIT_FAILURE)  in iov_kunit_extract_pages_kvec()
603  * Test the extraction of ITER_BVEC-type iterators.
613 	int i, from;  in iov_kunit_extract_pages_bvec()  local
624 	from = pr->from;  in iov_kunit_extract_pages_bvec()
628 		for (i = 0; i < ARRAY_SIZE(pagelist); i++)  in iov_kunit_extract_pages_bvec()
629 			pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;  in iov_kunit_extract_pages_bvec()
639 		KUNIT_EXPECT_EQ(test, iter.count, size - len);  in iov_kunit_extract_pages_bvec()
640 		size -= len;  in iov_kunit_extract_pages_bvec()
645 		for (i = 0; i < ARRAY_SIZE(pagelist); i++) {  in iov_kunit_extract_pages_bvec()
647 			ssize_t part = min_t(ssize_t, len, PAGE_SIZE - offset0);  in iov_kunit_extract_pages_bvec()
651 			while (from == pr->to) {  in iov_kunit_extract_pages_bvec()
653 				from = pr->from;  in iov_kunit_extract_pages_bvec()
657 			ix = pr->page + from / PAGE_SIZE;  in iov_kunit_extract_pages_bvec()
660 			KUNIT_EXPECT_PTR_EQ(test, pagelist[i], p);  in iov_kunit_extract_pages_bvec()
663 			len -= part;  in iov_kunit_extract_pages_bvec()
670 		if (test->status == KUNIT_FAILURE)  in iov_kunit_extract_pages_bvec()
681  * Test the extraction of ITER_XARRAY-type iterators.
691 	int i, from;  in iov_kunit_extract_pages_xarray()  local
701 	for (pr = kvec_test_ranges; pr->from >= 0; pr++) {  in iov_kunit_extract_pages_xarray()
702 		from = pr->from;  in iov_kunit_extract_pages_xarray()
703 		size = pr->to - from;  in iov_kunit_extract_pages_xarray()
704 		KUNIT_ASSERT_LE(test, pr->to, bufsize);  in iov_kunit_extract_pages_xarray()
711 			for (i = 0; i < ARRAY_SIZE(pagelist); i++)  in iov_kunit_extract_pages_xarray()
712 				pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;  in iov_kunit_extract_pages_xarray()
720 			KUNIT_EXPECT_EQ(test, iter.count, size - len);  in iov_kunit_extract_pages_xarray()
723 			size -= len;  in iov_kunit_extract_pages_xarray()
727 			for (i = 0; i < ARRAY_SIZE(pagelist); i++) {  in iov_kunit_extract_pages_xarray()
729 				ssize_t part = min_t(ssize_t, len, PAGE_SIZE - offset0);  in iov_kunit_extract_pages_xarray()
736 				KUNIT_EXPECT_PTR_EQ(test, pagelist[i], p);  in iov_kunit_extract_pages_xarray()
739 				len -= part;  in iov_kunit_extract_pages_xarray()
746 			if (test->status == KUNIT_FAILURE)  in iov_kunit_extract_pages_xarray()
752 		KUNIT_EXPECT_EQ(test, iter.iov_offset, pr->to - pr->from);  in iov_kunit_extract_pages_xarray()