[linux-block.git] / fs / btrfs / tests / extent-io-tests.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2013 Fusion IO.  All rights reserved.
 */

#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/sizes.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../extent_io.h"

#define PROCESS_UNLOCK		(1 << 0)
#define PROCESS_RELEASE		(1 << 1)
#define PROCESS_TEST_LOCKED	(1 << 2)

static noinline int process_page_range(struct inode *inode, u64 start, u64 end,
				       unsigned long flags)
{
	int ret;
	struct page *pages[16];
	unsigned long index = start >> PAGE_SHIFT;
	unsigned long end_index = end >> PAGE_SHIFT;
	unsigned long nr_pages = end_index - index + 1;
	int i;
	int count = 0;
	int loops = 0;

	while (nr_pages > 0) {
		ret = find_get_pages_contig(inode->i_mapping, index,
				     min_t(unsigned long, nr_pages,
				     ARRAY_SIZE(pages)), pages);
		for (i = 0; i < ret; i++) {
			if (flags & PROCESS_TEST_LOCKED &&
			    !PageLocked(pages[i]))
				count++;
			if (flags & PROCESS_UNLOCK && PageLocked(pages[i]))
				unlock_page(pages[i]);
			put_page(pages[i]);
			if (flags & PROCESS_RELEASE)
				put_page(pages[i]);
		}
		nr_pages -= ret;
		index += ret;
		cond_resched();
		loops++;
		if (loops > 100000) {
			printk(KERN_ERR
		"stuck in a loop, start %llu, end %llu, nr_pages %lu, ret %d\n",
				start, end, nr_pages, ret);
			break;
		}
	}
	return count;
}

static int test_find_delalloc(u32 sectorsize)
{
	struct inode *inode;
	struct extent_io_tree tmp;
	struct page *page;
	struct page *locked_page = NULL;
	unsigned long index = 0;
	/* In this test we need at least 2 file extents at its maximum size */
	u64 max_bytes = BTRFS_MAX_EXTENT_SIZE;
	u64 total_dirty = 2 * max_bytes;
	u64 start, end, test_start;
	bool found;
	int ret = -EINVAL;

	test_msg("running find delalloc tests");

	inode = btrfs_new_test_inode();
	if (!inode) {
		test_err("failed to allocate test inode");
		return -ENOMEM;
	}

	extent_io_tree_init(NULL, &tmp, NULL);

	/*
	 * First go through and create and mark all of our pages dirty, we pin
	 * everything to make sure our pages don't get evicted and screw up our
	 * test.
	 */
	for (index = 0; index < (total_dirty >> PAGE_SHIFT); index++) {
		page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
		if (!page) {
			test_err("failed to allocate test page");
			ret = -ENOMEM;
			goto out;
		}
		SetPageDirty(page);
		if (index) {
			unlock_page(page);
		} else {
			get_page(page);
			locked_page = page;
		}
	}

	/* Test this scenario
	 * |--- delalloc ---|
	 * |---  search  ---|
	 */
	set_extent_delalloc(&tmp, 0, sectorsize - 1, 0, NULL);
	start = 0;
	end = 0;
	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
					 &end);
	if (!found) {
		test_err("should have found at least one delalloc");
		goto out_bits;
	}
	if (start != 0 || end != (sectorsize - 1)) {
		test_err("expected start 0 end %u, got start %llu end %llu",
			sectorsize - 1, start, end);
		goto out_bits;
	}
	unlock_extent(&tmp, start, end);
	unlock_page(locked_page);
	put_page(locked_page);

	/*
	 * Test this scenario
	 *
	 * |--- delalloc ---|
	 *           |--- search ---|
	 */
	test_start = SZ_64M;
	locked_page = find_lock_page(inode->i_mapping,
				     test_start >> PAGE_SHIFT);
	if (!locked_page) {
		test_err("couldn't find the locked page");
		goto out_bits;
	}
	set_extent_delalloc(&tmp, sectorsize, max_bytes - 1, 0, NULL);
	start = test_start;
	end = 0;
	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
					 &end);
	if (!found) {
		test_err("couldn't find delalloc in our range");
		goto out_bits;
	}
	if (start != test_start || end != max_bytes - 1) {
		test_err("expected start %llu end %llu, got start %llu, end %llu",
				test_start, max_bytes - 1, start, end);
		goto out_bits;
	}
	if (process_page_range(inode, start, end,
			       PROCESS_TEST_LOCKED | PROCESS_UNLOCK)) {
		test_err("there were unlocked pages in the range");
		goto out_bits;
	}
	unlock_extent(&tmp, start, end);
	/* locked_page was unlocked above */
	put_page(locked_page);

	/*
	 * Test this scenario
	 * |--- delalloc ---|
	 *                    |--- search ---|
	 */
	test_start = max_bytes + sectorsize;
	locked_page = find_lock_page(inode->i_mapping, test_start >>
				     PAGE_SHIFT);
	if (!locked_page) {
		test_err("couldn't find the locked page");
		goto out_bits;
	}
	start = test_start;
	end = 0;
	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
					 &end);
	if (found) {
		test_err("found range when we shouldn't have");
		goto out_bits;
	}
	if (end != (u64)-1) {
		test_err("did not return the proper end offset");
		goto out_bits;
	}

	/*
	 * Test this scenario
	 * [------- delalloc -------|
	 * [max_bytes]|-- search--|
	 *
	 * We are re-using our test_start from above since it works out well.
	 */
	set_extent_delalloc(&tmp, max_bytes, total_dirty - 1, 0, NULL);
	start = test_start;
	end = 0;
	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
					 &end);
	if (!found) {
		test_err("didn't find our range");
		goto out_bits;
	}
	if (start != test_start || end != total_dirty - 1) {
		test_err("expected start %llu end %llu, got start %llu end %llu",
			 test_start, total_dirty - 1, start, end);
		goto out_bits;
	}
	if (process_page_range(inode, start, end,
			       PROCESS_TEST_LOCKED | PROCESS_UNLOCK)) {
		test_err("pages in range were not all locked");
		goto out_bits;
	}
	unlock_extent(&tmp, start, end);

	/*
	 * Now to test where we run into a page that is no longer dirty in the
	 * range we want to find.
	 */
	page = find_get_page(inode->i_mapping,
			     (max_bytes + SZ_1M) >> PAGE_SHIFT);
	if (!page) {
		test_err("couldn't find our page");
		goto out_bits;
	}
	ClearPageDirty(page);
	put_page(page);

	/* We unlocked it in the previous test */
	lock_page(locked_page);
	start = test_start;
	end = 0;
	/*
	 * Currently if we fail to find dirty pages in the delalloc range we
	 * will adjust max_bytes down to PAGE_SIZE and then re-search.  If
	 * this changes at any point in the future we will need to fix this
	 * tests expected behavior.
	 */
	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
					 &end);
	if (!found) {
		test_err("didn't find our range");
		goto out_bits;
	}
	if (start != test_start && end != test_start + PAGE_SIZE - 1) {
		test_err("expected start %llu end %llu, got start %llu end %llu",
			 test_start, test_start + PAGE_SIZE - 1, start, end);
		goto out_bits;
	}
	if (process_page_range(inode, start, end, PROCESS_TEST_LOCKED |
			       PROCESS_UNLOCK)) {
		test_err("pages in range were not all locked");
		goto out_bits;
	}
	ret = 0;
out_bits:
	clear_extent_bits(&tmp, 0, total_dirty - 1, (unsigned)-1);
out:
	if (locked_page)
		put_page(locked_page);
	process_page_range(inode, 0, total_dirty - 1,
			   PROCESS_UNLOCK | PROCESS_RELEASE);
	iput(inode);
	return ret;
}

static int check_eb_bitmap(unsigned long *bitmap, struct extent_buffer *eb,
			   unsigned long len)
{
	unsigned long i;

	for (i = 0; i < len * BITS_PER_BYTE; i++) {
		int bit, bit1;

		bit = !!test_bit(i, bitmap);
		bit1 = !!extent_buffer_test_bit(eb, 0, i);
		if (bit1 != bit) {
			test_err("bits do not match");
			return -EINVAL;
		}

		bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
						i % BITS_PER_BYTE);
		if (bit1 != bit) {
			test_err("offset bits do not match");
			return -EINVAL;
		}
	}
	return 0;
}

static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
			     unsigned long len)
{
	unsigned long i, j;
	u32 x;
	int ret;

	memset(bitmap, 0, len);
	memzero_extent_buffer(eb, 0, len);
	if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
		test_err("bitmap was not zeroed");
		return -EINVAL;
	}

	bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
	extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
	ret = check_eb_bitmap(bitmap, eb, len);
	if (ret) {
		test_err("setting all bits failed");
		return ret;
	}

	bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
	extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
	ret = check_eb_bitmap(bitmap, eb, len);
	if (ret) {
		test_err("clearing all bits failed");
		return ret;
	}

	/* Straddling pages test */
	if (len > PAGE_SIZE) {
		bitmap_set(bitmap,
			(PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
			sizeof(long) * BITS_PER_BYTE);
		extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
					sizeof(long) * BITS_PER_BYTE);
		ret = check_eb_bitmap(bitmap, eb, len);
		if (ret) {
			test_err("setting straddling pages failed");
			return ret;
		}

		bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
		bitmap_clear(bitmap,
			(PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
			sizeof(long) * BITS_PER_BYTE);
		extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
		extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
					sizeof(long) * BITS_PER_BYTE);
		ret = check_eb_bitmap(bitmap, eb, len);
		if (ret) {
			test_err("clearing straddling pages failed");
			return ret;
		}
	}

	/*
	 * Generate a wonky pseudo-random bit pattern for the sake of not using
	 * something repetitive that could miss some hypothetical off-by-n bug.
	 */
	x = 0;
	bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
	extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
	for (i = 0; i < len * BITS_PER_BYTE / 32; i++) {
		x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffU;
		for (j = 0; j < 32; j++) {
			if (x & (1U << j)) {
				bitmap_set(bitmap, i * 32 + j, 1);
				extent_buffer_bitmap_set(eb, 0, i * 32 + j, 1);
			}
		}
	}

	ret = check_eb_bitmap(bitmap, eb, len);
	if (ret) {
		test_err("random bit pattern failed");
		return ret;
	}

	return 0;
}

static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
{
	struct btrfs_fs_info *fs_info;
	unsigned long len;
	unsigned long *bitmap;
	struct extent_buffer *eb;
	int ret;

	test_msg("running extent buffer bitmap tests");

	/*
	 * In ppc64, sectorsize can be 64K, thus 4 * 64K will be larger than
	 * BTRFS_MAX_METADATA_BLOCKSIZE.
	 */
	len = (sectorsize < BTRFS_MAX_METADATA_BLOCKSIZE)
		? sectorsize * 4 : sectorsize;

	fs_info = btrfs_alloc_dummy_fs_info(len, len);

	bitmap = kmalloc(len, GFP_KERNEL);
	if (!bitmap) {
		test_err("couldn't allocate test bitmap");
		return -ENOMEM;
	}

	eb = __alloc_dummy_extent_buffer(fs_info, 0, len);
	if (!eb) {
		test_err("couldn't allocate test extent buffer");
		kfree(bitmap);
		return -ENOMEM;
	}

	ret = __test_eb_bitmaps(bitmap, eb, len);
	if (ret)
		goto out;

	/* Do it over again with an extent buffer which isn't page-aligned. */
	free_extent_buffer(eb);
	eb = __alloc_dummy_extent_buffer(NULL, nodesize / 2, len);
	if (!eb) {
		test_err("couldn't allocate test extent buffer");
		kfree(bitmap);
		return -ENOMEM;
	}

	ret = __test_eb_bitmaps(bitmap, eb, len);
out:
	free_extent_buffer(eb);
	kfree(bitmap);
	return ret;
}

int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
{
	int ret;

	test_msg("running extent I/O tests");

	ret = test_find_delalloc(sectorsize);
	if (ret)
		goto out;

	ret = test_eb_bitmaps(sectorsize, nodesize);
out:
	test_msg("extent I/O tests finished");
	return ret;
}
Commit	Line	Data
c1d7c514	1	// SPDX-License-Identifier: GPL-2.0
294e30fe JB	2	/*
294e30fe JB	3	* Copyright (C) 2013 Fusion IO. All rights reserved.
294e30fe JB	4	*/
	5
	6	#include <linux/pagemap.h>
	7	#include <linux/sched.h>
0f331229	8	#include <linux/slab.h>
ee22184b	9	#include <linux/sizes.h>
294e30fe	10	#include "btrfs-tests.h"
ed9e4afd	11	#include "../ctree.h"
294e30fe JB	12	#include "../extent_io.h"
	13
	14	#define PROCESS_UNLOCK (1 << 0)
	15	#define PROCESS_RELEASE (1 << 1)
	16	#define PROCESS_TEST_LOCKED (1 << 2)
	17
	18	static noinline int process_page_range(struct inode *inode, u64 start, u64 end,
	19	unsigned long flags)
	20	{
	21	int ret;
	22	struct page *pages[16];
09cbfeaf KS	23	unsigned long index = start >> PAGE_SHIFT;
09cbfeaf KS	24	unsigned long end_index = end >> PAGE_SHIFT;
294e30fe JB	25	unsigned long nr_pages = end_index - index + 1;
	26	int i;
	27	int count = 0;
	28	int loops = 0;
	29
	30	while (nr_pages > 0) {
	31	ret = find_get_pages_contig(inode->i_mapping, index,
	32	min_t(unsigned long, nr_pages,
	33	ARRAY_SIZE(pages)), pages);
	34	for (i = 0; i < ret; i++) {
	35	if (flags & PROCESS_TEST_LOCKED &&
	36	!PageLocked(pages[i]))
	37	count++;
	38	if (flags & PROCESS_UNLOCK && PageLocked(pages[i]))
	39	unlock_page(pages[i]);
09cbfeaf	40	put_page(pages[i]);
294e30fe	41	if (flags & PROCESS_RELEASE)
09cbfeaf	42	put_page(pages[i]);
294e30fe JB	43	}
	44	nr_pages -= ret;
	45	index += ret;
	46	cond_resched();
	47	loops++;
	48	if (loops > 100000) {
3c7251f2 DS	49	printk(KERN_ERR
	50	"stuck in a loop, start %llu, end %llu, nr_pages %lu, ret %d\n",
	51	start, end, nr_pages, ret);
294e30fe JB	52	break;
	53	}
	54	}
	55	return count;
	56	}
	57
b9ef22de	58	static int test_find_delalloc(u32 sectorsize)
294e30fe JB	59	{
	60	struct inode *inode;
	61	struct extent_io_tree tmp;
	62	struct page *page;
	63	struct page *locked_page = NULL;
	64	unsigned long index = 0;
d9cb2459 QW	65	/* In this test we need at least 2 file extents at its maximum size */
	66	u64 max_bytes = BTRFS_MAX_EXTENT_SIZE;
	67	u64 total_dirty = 2 * max_bytes;
294e30fe	68	u64 start, end, test_start;
3522e903	69	bool found;
294e30fe JB	70	int ret = -EINVAL;
294e30fe JB	71
315b76b4	72	test_msg("running find delalloc tests");
0f331229	73
294e30fe JB	74	inode = btrfs_new_test_inode();
294e30fe JB	75	if (!inode) {
3c7251f2	76	test_err("failed to allocate test inode");
294e30fe JB	77	return -ENOMEM;
	78	}
	79
c258d6e3	80	extent_io_tree_init(NULL, &tmp, NULL);
294e30fe JB	81
	82	/*
	83	* First go through and create and mark all of our pages dirty, we pin
	84	* everything to make sure our pages don't get evicted and screw up our
	85	* test.
	86	*/
09cbfeaf	87	for (index = 0; index < (total_dirty >> PAGE_SHIFT); index++) {
8cce83ba	88	page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
294e30fe	89	if (!page) {
3c7251f2	90	test_err("failed to allocate test page");
294e30fe JB	91	ret = -ENOMEM;
	92	goto out;
	93	}
	94	SetPageDirty(page);
	95	if (index) {
	96	unlock_page(page);
	97	} else {
09cbfeaf	98	get_page(page);
294e30fe JB	99	locked_page = page;
	100	}
	101	}
	102
	103	/* Test this scenario
	104	* \|--- delalloc ---\|
	105	* \|--- search ---\|
	106	*/
e3b8a485	107	set_extent_delalloc(&tmp, 0, sectorsize - 1, 0, NULL);
294e30fe JB	108	start = 0;
294e30fe JB	109	end = 0;
ce9f967f	110	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
917aacec	111	&end);
294e30fe	112	if (!found) {
3c7251f2	113	test_err("should have found at least one delalloc");
294e30fe JB	114	goto out_bits;
294e30fe JB	115	}
b9ef22de	116	if (start != 0 \|\| end != (sectorsize - 1)) {
3c7251f2	117	test_err("expected start 0 end %u, got start %llu end %llu",
b9ef22de	118	sectorsize - 1, start, end);
294e30fe JB	119	goto out_bits;
	120	}
	121	unlock_extent(&tmp, start, end);
	122	unlock_page(locked_page);
09cbfeaf	123	put_page(locked_page);
294e30fe JB	124
	125	/*
	126	* Test this scenario
	127	*
	128	* \|--- delalloc ---\|
	129	* \|--- search ---\|
	130	*/
ee22184b	131	test_start = SZ_64M;
294e30fe	132	locked_page = find_lock_page(inode->i_mapping,
09cbfeaf	133	test_start >> PAGE_SHIFT);
294e30fe	134	if (!locked_page) {
3c7251f2	135	test_err("couldn't find the locked page");
294e30fe JB	136	goto out_bits;
294e30fe JB	137	}
e3b8a485	138	set_extent_delalloc(&tmp, sectorsize, max_bytes - 1, 0, NULL);
294e30fe JB	139	start = test_start;
294e30fe JB	140	end = 0;
ce9f967f	141	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
917aacec	142	&end);
294e30fe	143	if (!found) {
3c7251f2	144	test_err("couldn't find delalloc in our range");
294e30fe JB	145	goto out_bits;
	146	}
	147	if (start != test_start \|\| end != max_bytes - 1) {
3c7251f2 DS	148	test_err("expected start %llu end %llu, got start %llu, end %llu",
3c7251f2 DS	149	test_start, max_bytes - 1, start, end);
294e30fe JB	150	goto out_bits;
	151	}
	152	if (process_page_range(inode, start, end,
	153	PROCESS_TEST_LOCKED \| PROCESS_UNLOCK)) {
3c7251f2	154	test_err("there were unlocked pages in the range");
294e30fe JB	155	goto out_bits;
	156	}
	157	unlock_extent(&tmp, start, end);
	158	/* locked_page was unlocked above */
09cbfeaf	159	put_page(locked_page);
294e30fe JB	160
	161	/*
	162	* Test this scenario
	163	* \|--- delalloc ---\|
	164	* \|--- search ---\|
	165	*/
b9ef22de	166	test_start = max_bytes + sectorsize;
294e30fe	167	locked_page = find_lock_page(inode->i_mapping, test_start >>
09cbfeaf	168	PAGE_SHIFT);
294e30fe	169	if (!locked_page) {
3c7251f2	170	test_err("couldn't find the locked page");
294e30fe JB	171	goto out_bits;
	172	}
	173	start = test_start;
	174	end = 0;
ce9f967f	175	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
917aacec	176	&end);
294e30fe	177	if (found) {
3c7251f2	178	test_err("found range when we shouldn't have");
294e30fe JB	179	goto out_bits;
	180	}
	181	if (end != (u64)-1) {
3c7251f2	182	test_err("did not return the proper end offset");
294e30fe JB	183	goto out_bits;
	184	}
	185
	186	/*
	187	* Test this scenario
	188	* [------- delalloc -------\|
	189	* [max_bytes]\|-- search--\|
	190	*
	191	* We are re-using our test_start from above since it works out well.
	192	*/
e3b8a485	193	set_extent_delalloc(&tmp, max_bytes, total_dirty - 1, 0, NULL);
294e30fe JB	194	start = test_start;
294e30fe JB	195	end = 0;
ce9f967f	196	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
917aacec	197	&end);
294e30fe	198	if (!found) {
3c7251f2	199	test_err("didn't find our range");
294e30fe JB	200	goto out_bits;
	201	}
	202	if (start != test_start \|\| end != total_dirty - 1) {
3c7251f2	203	test_err("expected start %llu end %llu, got start %llu end %llu",
294e30fe JB	204	test_start, total_dirty - 1, start, end);
	205	goto out_bits;
	206	}
	207	if (process_page_range(inode, start, end,
	208	PROCESS_TEST_LOCKED \| PROCESS_UNLOCK)) {
3c7251f2	209	test_err("pages in range were not all locked");
294e30fe JB	210	goto out_bits;
	211	}
	212	unlock_extent(&tmp, start, end);
	213
	214	/*
	215	* Now to test where we run into a page that is no longer dirty in the
	216	* range we want to find.
	217	*/
ee22184b	218	page = find_get_page(inode->i_mapping,
09cbfeaf	219	(max_bytes + SZ_1M) >> PAGE_SHIFT);
294e30fe	220	if (!page) {
3c7251f2	221	test_err("couldn't find our page");
294e30fe JB	222	goto out_bits;
	223	}
	224	ClearPageDirty(page);
09cbfeaf	225	put_page(page);
294e30fe JB	226
	227	/* We unlocked it in the previous test */
	228	lock_page(locked_page);
	229	start = test_start;
	230	end = 0;
	231	/*
	232	* Currently if we fail to find dirty pages in the delalloc range we
ea1754a0	233	* will adjust max_bytes down to PAGE_SIZE and then re-search. If
294e30fe JB	234	* this changes at any point in the future we will need to fix this
	235	* tests expected behavior.
	236	*/
ce9f967f	237	found = find_lock_delalloc_range(inode, &tmp, locked_page, &start,
917aacec	238	&end);
294e30fe	239	if (!found) {
3c7251f2	240	test_err("didn't find our range");
294e30fe JB	241	goto out_bits;
294e30fe JB	242	}
09cbfeaf	243	if (start != test_start && end != test_start + PAGE_SIZE - 1) {
3c7251f2 DS	244	test_err("expected start %llu end %llu, got start %llu end %llu",
3c7251f2 DS	245	test_start, test_start + PAGE_SIZE - 1, start, end);
294e30fe JB	246	goto out_bits;
	247	}
	248	if (process_page_range(inode, start, end, PROCESS_TEST_LOCKED \|
	249	PROCESS_UNLOCK)) {
3c7251f2	250	test_err("pages in range were not all locked");
294e30fe JB	251	goto out_bits;
	252	}
	253	ret = 0;
	254	out_bits:
91166212	255	clear_extent_bits(&tmp, 0, total_dirty - 1, (unsigned)-1);
294e30fe JB	256	out:
294e30fe JB	257	if (locked_page)
09cbfeaf	258	put_page(locked_page);
294e30fe JB	259	process_page_range(inode, 0, total_dirty - 1,
	260	PROCESS_UNLOCK \| PROCESS_RELEASE);
	261	iput(inode);
	262	return ret;
	263	}
	264
9426ce75 OS	265	static int check_eb_bitmap(unsigned long bitmap, struct extent_buffer eb,
9426ce75 OS	266	unsigned long len)
34b3e6c9	267	{
9426ce75 OS	268	unsigned long i;
	269
	270	for (i = 0; i < len * BITS_PER_BYTE; i++) {
	271	int bit, bit1;
	272
	273	bit = !!test_bit(i, bitmap);
	274	bit1 = !!extent_buffer_test_bit(eb, 0, i);
	275	if (bit1 != bit) {
3c7251f2	276	test_err("bits do not match");
9426ce75 OS	277	return -EINVAL;
	278	}
	279
	280	bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
	281	i % BITS_PER_BYTE);
	282	if (bit1 != bit) {
3c7251f2	283	test_err("offset bits do not match");
9426ce75 OS	284	return -EINVAL;
	285	}
	286	}
	287	return 0;
34b3e6c9 FX	288	}
34b3e6c9 FX	289
0f331229 OS	290	static int __test_eb_bitmaps(unsigned long bitmap, struct extent_buffer eb,
	291	unsigned long len)
	292	{
9426ce75 OS	293	unsigned long i, j;
	294	u32 x;
	295	int ret;
0f331229 OS	296
0f331229 OS	297	memset(bitmap, 0, len);
b159fa28	298	memzero_extent_buffer(eb, 0, len);
0f331229	299	if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
3c7251f2	300	test_err("bitmap was not zeroed");
0f331229 OS	301	return -EINVAL;
	302	}
	303
	304	bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
	305	extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
9426ce75 OS	306	ret = check_eb_bitmap(bitmap, eb, len);
9426ce75 OS	307	if (ret) {
3c7251f2	308	test_err("setting all bits failed");
9426ce75	309	return ret;
0f331229 OS	310	}
	311
	312	bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
	313	extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
9426ce75 OS	314	ret = check_eb_bitmap(bitmap, eb, len);
9426ce75 OS	315	if (ret) {
3c7251f2	316	test_err("clearing all bits failed");
9426ce75	317	return ret;
0f331229 OS	318	}
0f331229 OS	319
ed9e4afd FX	320	/* Straddling pages test */
	321	if (len > PAGE_SIZE) {
	322	bitmap_set(bitmap,
	323	(PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
	324	sizeof(long) * BITS_PER_BYTE);
	325	extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
	326	sizeof(long) * BITS_PER_BYTE);
9426ce75 OS	327	ret = check_eb_bitmap(bitmap, eb, len);
9426ce75 OS	328	if (ret) {
3c7251f2	329	test_err("setting straddling pages failed");
9426ce75	330	return ret;
ed9e4afd	331	}
0f331229	332
ed9e4afd FX	333	bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
	334	bitmap_clear(bitmap,
	335	(PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
	336	sizeof(long) * BITS_PER_BYTE);
	337	extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
	338	extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
	339	sizeof(long) * BITS_PER_BYTE);
9426ce75 OS	340	ret = check_eb_bitmap(bitmap, eb, len);
9426ce75 OS	341	if (ret) {
3c7251f2	342	test_err("clearing straddling pages failed");
9426ce75	343	return ret;
ed9e4afd	344	}
0f331229 OS	345	}
	346
	347	/*
	348	* Generate a wonky pseudo-random bit pattern for the sake of not using
	349	* something repetitive that could miss some hypothetical off-by-n bug.
	350	*/
	351	x = 0;
9426ce75 OS	352	bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
	353	extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
	354	for (i = 0; i < len * BITS_PER_BYTE / 32; i++) {
	355	x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffU;
	356	for (j = 0; j < 32; j++) {
	357	if (x & (1U << j)) {
	358	bitmap_set(bitmap, i * 32 + j, 1);
	359	extent_buffer_bitmap_set(eb, 0, i * 32 + j, 1);
	360	}
0f331229	361	}
9426ce75	362	}
0f331229	363
9426ce75 OS	364	ret = check_eb_bitmap(bitmap, eb, len);
9426ce75 OS	365	if (ret) {
3c7251f2	366	test_err("random bit pattern failed");
9426ce75	367	return ret;
0f331229 OS	368	}
	369
	370	return 0;
	371	}
	372
b9ef22de	373	static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
0f331229	374	{
da17066c	375	struct btrfs_fs_info *fs_info;
b9ef22de	376	unsigned long len;
0f331229 OS	377	unsigned long *bitmap;
	378	struct extent_buffer *eb;
	379	int ret;
	380
315b76b4	381	test_msg("running extent buffer bitmap tests");
ed9e4afd FX	382
	383	/*
	384	* In ppc64, sectorsize can be 64K, thus 4 * 64K will be larger than
	385	* BTRFS_MAX_METADATA_BLOCKSIZE.
	386	*/
	387	len = (sectorsize < BTRFS_MAX_METADATA_BLOCKSIZE)
	388	? sectorsize * 4 : sectorsize;
0f331229	389
da17066c JM	390	fs_info = btrfs_alloc_dummy_fs_info(len, len);
da17066c JM	391
8cce83ba	392	bitmap = kmalloc(len, GFP_KERNEL);
0f331229	393	if (!bitmap) {
3c7251f2	394	test_err("couldn't allocate test bitmap");
0f331229 OS	395	return -ENOMEM;
	396	}
	397
da17066c	398	eb = __alloc_dummy_extent_buffer(fs_info, 0, len);
0f331229	399	if (!eb) {
3c7251f2	400	test_err("couldn't allocate test extent buffer");
0f331229 OS	401	kfree(bitmap);
	402	return -ENOMEM;
	403	}
	404
	405	ret = __test_eb_bitmaps(bitmap, eb, len);
	406	if (ret)
	407	goto out;
	408
	409	/* Do it over again with an extent buffer which isn't page-aligned. */
	410	free_extent_buffer(eb);
b9ef22de	411	eb = __alloc_dummy_extent_buffer(NULL, nodesize / 2, len);
0f331229	412	if (!eb) {
3c7251f2	413	test_err("couldn't allocate test extent buffer");
0f331229 OS	414	kfree(bitmap);
	415	return -ENOMEM;
	416	}
	417
	418	ret = __test_eb_bitmaps(bitmap, eb, len);
	419	out:
	420	free_extent_buffer(eb);
	421	kfree(bitmap);
	422	return ret;
	423	}
	424
b9ef22de	425	int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
294e30fe	426	{
0f331229 OS	427	int ret;
0f331229 OS	428
315b76b4	429	test_msg("running extent I/O tests");
0f331229	430
b9ef22de	431	ret = test_find_delalloc(sectorsize);
0f331229 OS	432	if (ret)
	433	goto out;
	434
b9ef22de	435	ret = test_eb_bitmaps(sectorsize, nodesize);
0f331229	436	out:
315b76b4	437	test_msg("extent I/O tests finished");
0f331229	438	return ret;
294e30fe	439	}