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2
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5
6#include <linux/pagemap.h>
7#include <linux/sched.h>
8#include <linux/slab.h>
9#include <linux/sizes.h>
10#include "btrfs-tests.h"
11#include "../ctree.h"
12#include "../extent_io.h"
13#include "../btrfs_inode.h"
14
15#define PROCESS_UNLOCK (1 << 0)
16#define PROCESS_RELEASE (1 << 1)
17#define PROCESS_TEST_LOCKED (1 << 2)
18
19static noinline int process_page_range(struct inode *inode, u64 start, u64 end,
20 unsigned long flags)
21{
22 int ret;
23 struct page *pages[16];
24 unsigned long index = start >> PAGE_SHIFT;
25 unsigned long end_index = end >> PAGE_SHIFT;
26 unsigned long nr_pages = end_index - index + 1;
27 int i;
28 int count = 0;
29 int loops = 0;
30
31 while (nr_pages > 0) {
32 ret = find_get_pages_contig(inode->i_mapping, index,
33 min_t(unsigned long, nr_pages,
34 ARRAY_SIZE(pages)), pages);
35 for (i = 0; i < ret; i++) {
36 if (flags & PROCESS_TEST_LOCKED &&
37 !PageLocked(pages[i]))
38 count++;
39 if (flags & PROCESS_UNLOCK && PageLocked(pages[i]))
40 unlock_page(pages[i]);
41 put_page(pages[i]);
42 if (flags & PROCESS_RELEASE)
43 put_page(pages[i]);
44 }
45 nr_pages -= ret;
46 index += ret;
47 cond_resched();
48 loops++;
49 if (loops > 100000) {
50 printk(KERN_ERR
51 "stuck in a loop, start %llu, end %llu, nr_pages %lu, ret %d\n",
52 start, end, nr_pages, ret);
53 break;
54 }
55 }
56 return count;
57}
58
59static int test_find_delalloc(u32 sectorsize)
60{
61 struct inode *inode;
62 struct extent_io_tree *tmp;
63 struct page *page;
64 struct page *locked_page = NULL;
65 unsigned long index = 0;
66
67 u64 max_bytes = BTRFS_MAX_EXTENT_SIZE;
68 u64 total_dirty = 2 * max_bytes;
69 u64 start, end, test_start;
70 bool found;
71 int ret = -EINVAL;
72
73 test_msg("running find delalloc tests");
74
75 inode = btrfs_new_test_inode();
76 if (!inode) {
77 test_std_err(TEST_ALLOC_INODE);
78 return -ENOMEM;
79 }
80 tmp = &BTRFS_I(inode)->io_tree;
81
82
83
84
85
86 extent_io_tree_init(NULL, tmp, IO_TREE_SELFTEST, NULL);
87
88
89
90
91
92
93 for (index = 0; index < (total_dirty >> PAGE_SHIFT); index++) {
94 page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
95 if (!page) {
96 test_err("failed to allocate test page");
97 ret = -ENOMEM;
98 goto out;
99 }
100 SetPageDirty(page);
101 if (index) {
102 unlock_page(page);
103 } else {
104 get_page(page);
105 locked_page = page;
106 }
107 }
108
109
110
111
112
113 set_extent_delalloc(tmp, 0, sectorsize - 1, 0, NULL);
114 start = 0;
115 end = 0;
116 found = find_lock_delalloc_range(inode, locked_page, &start,
117 &end);
118 if (!found) {
119 test_err("should have found at least one delalloc");
120 goto out_bits;
121 }
122 if (start != 0 || end != (sectorsize - 1)) {
123 test_err("expected start 0 end %u, got start %llu end %llu",
124 sectorsize - 1, start, end);
125 goto out_bits;
126 }
127 unlock_extent(tmp, start, end);
128 unlock_page(locked_page);
129 put_page(locked_page);
130
131
132
133
134
135
136
137 test_start = SZ_64M;
138 locked_page = find_lock_page(inode->i_mapping,
139 test_start >> PAGE_SHIFT);
140 if (!locked_page) {
141 test_err("couldn't find the locked page");
142 goto out_bits;
143 }
144 set_extent_delalloc(tmp, sectorsize, max_bytes - 1, 0, NULL);
145 start = test_start;
146 end = 0;
147 found = find_lock_delalloc_range(inode, locked_page, &start,
148 &end);
149 if (!found) {
150 test_err("couldn't find delalloc in our range");
151 goto out_bits;
152 }
153 if (start != test_start || end != max_bytes - 1) {
154 test_err("expected start %llu end %llu, got start %llu, end %llu",
155 test_start, max_bytes - 1, start, end);
156 goto out_bits;
157 }
158 if (process_page_range(inode, start, end,
159 PROCESS_TEST_LOCKED | PROCESS_UNLOCK)) {
160 test_err("there were unlocked pages in the range");
161 goto out_bits;
162 }
163 unlock_extent(tmp, start, end);
164
165 put_page(locked_page);
166
167
168
169
170
171
172 test_start = max_bytes + sectorsize;
173 locked_page = find_lock_page(inode->i_mapping, test_start >>
174 PAGE_SHIFT);
175 if (!locked_page) {
176 test_err("couldn't find the locked page");
177 goto out_bits;
178 }
179 start = test_start;
180 end = 0;
181 found = find_lock_delalloc_range(inode, locked_page, &start,
182 &end);
183 if (found) {
184 test_err("found range when we shouldn't have");
185 goto out_bits;
186 }
187 if (end != (u64)-1) {
188 test_err("did not return the proper end offset");
189 goto out_bits;
190 }
191
192
193
194
195
196
197
198
199 set_extent_delalloc(tmp, max_bytes, total_dirty - 1, 0, NULL);
200 start = test_start;
201 end = 0;
202 found = find_lock_delalloc_range(inode, locked_page, &start,
203 &end);
204 if (!found) {
205 test_err("didn't find our range");
206 goto out_bits;
207 }
208 if (start != test_start || end != total_dirty - 1) {
209 test_err("expected start %llu end %llu, got start %llu end %llu",
210 test_start, total_dirty - 1, start, end);
211 goto out_bits;
212 }
213 if (process_page_range(inode, start, end,
214 PROCESS_TEST_LOCKED | PROCESS_UNLOCK)) {
215 test_err("pages in range were not all locked");
216 goto out_bits;
217 }
218 unlock_extent(tmp, start, end);
219
220
221
222
223
224 page = find_get_page(inode->i_mapping,
225 (max_bytes + SZ_1M) >> PAGE_SHIFT);
226 if (!page) {
227 test_err("couldn't find our page");
228 goto out_bits;
229 }
230 ClearPageDirty(page);
231 put_page(page);
232
233
234 lock_page(locked_page);
235 start = test_start;
236 end = 0;
237
238
239
240
241
242
243 found = find_lock_delalloc_range(inode, locked_page, &start,
244 &end);
245 if (!found) {
246 test_err("didn't find our range");
247 goto out_bits;
248 }
249 if (start != test_start && end != test_start + PAGE_SIZE - 1) {
250 test_err("expected start %llu end %llu, got start %llu end %llu",
251 test_start, test_start + PAGE_SIZE - 1, start, end);
252 goto out_bits;
253 }
254 if (process_page_range(inode, start, end, PROCESS_TEST_LOCKED |
255 PROCESS_UNLOCK)) {
256 test_err("pages in range were not all locked");
257 goto out_bits;
258 }
259 ret = 0;
260out_bits:
261 clear_extent_bits(tmp, 0, total_dirty - 1, (unsigned)-1);
262out:
263 if (locked_page)
264 put_page(locked_page);
265 process_page_range(inode, 0, total_dirty - 1,
266 PROCESS_UNLOCK | PROCESS_RELEASE);
267 iput(inode);
268 return ret;
269}
270
271static int check_eb_bitmap(unsigned long *bitmap, struct extent_buffer *eb,
272 unsigned long len)
273{
274 unsigned long i;
275
276 for (i = 0; i < len * BITS_PER_BYTE; i++) {
277 int bit, bit1;
278
279 bit = !!test_bit(i, bitmap);
280 bit1 = !!extent_buffer_test_bit(eb, 0, i);
281 if (bit1 != bit) {
282 test_err("bits do not match");
283 return -EINVAL;
284 }
285
286 bit1 = !!extent_buffer_test_bit(eb, i / BITS_PER_BYTE,
287 i % BITS_PER_BYTE);
288 if (bit1 != bit) {
289 test_err("offset bits do not match");
290 return -EINVAL;
291 }
292 }
293 return 0;
294}
295
296static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb,
297 unsigned long len)
298{
299 unsigned long i, j;
300 u32 x;
301 int ret;
302
303 memset(bitmap, 0, len);
304 memzero_extent_buffer(eb, 0, len);
305 if (memcmp_extent_buffer(eb, bitmap, 0, len) != 0) {
306 test_err("bitmap was not zeroed");
307 return -EINVAL;
308 }
309
310 bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
311 extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
312 ret = check_eb_bitmap(bitmap, eb, len);
313 if (ret) {
314 test_err("setting all bits failed");
315 return ret;
316 }
317
318 bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
319 extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
320 ret = check_eb_bitmap(bitmap, eb, len);
321 if (ret) {
322 test_err("clearing all bits failed");
323 return ret;
324 }
325
326
327 if (len > PAGE_SIZE) {
328 bitmap_set(bitmap,
329 (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
330 sizeof(long) * BITS_PER_BYTE);
331 extent_buffer_bitmap_set(eb, PAGE_SIZE - sizeof(long) / 2, 0,
332 sizeof(long) * BITS_PER_BYTE);
333 ret = check_eb_bitmap(bitmap, eb, len);
334 if (ret) {
335 test_err("setting straddling pages failed");
336 return ret;
337 }
338
339 bitmap_set(bitmap, 0, len * BITS_PER_BYTE);
340 bitmap_clear(bitmap,
341 (PAGE_SIZE - sizeof(long) / 2) * BITS_PER_BYTE,
342 sizeof(long) * BITS_PER_BYTE);
343 extent_buffer_bitmap_set(eb, 0, 0, len * BITS_PER_BYTE);
344 extent_buffer_bitmap_clear(eb, PAGE_SIZE - sizeof(long) / 2, 0,
345 sizeof(long) * BITS_PER_BYTE);
346 ret = check_eb_bitmap(bitmap, eb, len);
347 if (ret) {
348 test_err("clearing straddling pages failed");
349 return ret;
350 }
351 }
352
353
354
355
356
357 x = 0;
358 bitmap_clear(bitmap, 0, len * BITS_PER_BYTE);
359 extent_buffer_bitmap_clear(eb, 0, 0, len * BITS_PER_BYTE);
360 for (i = 0; i < len * BITS_PER_BYTE / 32; i++) {
361 x = (0x19660dULL * (u64)x + 0x3c6ef35fULL) & 0xffffffffU;
362 for (j = 0; j < 32; j++) {
363 if (x & (1U << j)) {
364 bitmap_set(bitmap, i * 32 + j, 1);
365 extent_buffer_bitmap_set(eb, 0, i * 32 + j, 1);
366 }
367 }
368 }
369
370 ret = check_eb_bitmap(bitmap, eb, len);
371 if (ret) {
372 test_err("random bit pattern failed");
373 return ret;
374 }
375
376 return 0;
377}
378
379static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
380{
381 struct btrfs_fs_info *fs_info;
382 unsigned long len;
383 unsigned long *bitmap = NULL;
384 struct extent_buffer *eb = NULL;
385 int ret;
386
387 test_msg("running extent buffer bitmap tests");
388
389
390
391
392
393 len = (sectorsize < BTRFS_MAX_METADATA_BLOCKSIZE)
394 ? sectorsize * 4 : sectorsize;
395
396 fs_info = btrfs_alloc_dummy_fs_info(len, len);
397 if (!fs_info) {
398 test_std_err(TEST_ALLOC_FS_INFO);
399 return -ENOMEM;
400 }
401
402 bitmap = kmalloc(len, GFP_KERNEL);
403 if (!bitmap) {
404 test_err("couldn't allocate test bitmap");
405 ret = -ENOMEM;
406 goto out;
407 }
408
409 eb = __alloc_dummy_extent_buffer(fs_info, 0, len);
410 if (!eb) {
411 test_std_err(TEST_ALLOC_ROOT);
412 ret = -ENOMEM;
413 goto out;
414 }
415
416 ret = __test_eb_bitmaps(bitmap, eb, len);
417 if (ret)
418 goto out;
419
420
421 free_extent_buffer(eb);
422 eb = __alloc_dummy_extent_buffer(fs_info, nodesize / 2, len);
423 if (!eb) {
424 test_std_err(TEST_ALLOC_ROOT);
425 ret = -ENOMEM;
426 goto out;
427 }
428
429 ret = __test_eb_bitmaps(bitmap, eb, len);
430out:
431 free_extent_buffer(eb);
432 kfree(bitmap);
433 btrfs_free_dummy_fs_info(fs_info);
434 return ret;
435}
436
437static int test_find_first_clear_extent_bit(void)
438{
439 struct extent_io_tree tree;
440 u64 start, end;
441
442 test_msg("running find_first_clear_extent_bit test");
443 extent_io_tree_init(NULL, &tree, IO_TREE_SELFTEST, NULL);
444
445
446
447
448
449 set_extent_bits(&tree, SZ_1M, SZ_4M - 1,
450 CHUNK_TRIMMED | CHUNK_ALLOCATED);
451
452 find_first_clear_extent_bit(&tree, SZ_512K, &start, &end,
453 CHUNK_TRIMMED | CHUNK_ALLOCATED);
454
455 if (start != 0 || end != SZ_1M -1)
456 test_err("error finding beginning range: start %llu end %llu",
457 start, end);
458
459
460 set_extent_bits(&tree, SZ_32M, SZ_64M - 1,
461 CHUNK_TRIMMED | CHUNK_ALLOCATED);
462
463
464
465
466 find_first_clear_extent_bit(&tree, 12 * SZ_1M, &start, &end,
467 CHUNK_TRIMMED | CHUNK_ALLOCATED);
468
469 if (start != SZ_4M || end != SZ_32M - 1)
470 test_err("error finding trimmed range: start %llu end %llu",
471 start, end);
472
473
474
475
476
477 find_first_clear_extent_bit(&tree, SZ_2M, &start, &end,
478 CHUNK_TRIMMED | CHUNK_ALLOCATED);
479
480 if (start != SZ_4M || end != SZ_32M -1)
481 test_err("error finding next unalloc range: start %llu end %llu",
482 start, end);
483
484
485
486
487
488 set_extent_bits(&tree, SZ_64M, SZ_64M + SZ_8M - 1, CHUNK_ALLOCATED);
489 find_first_clear_extent_bit(&tree, SZ_64M + SZ_1M, &start, &end,
490 CHUNK_TRIMMED);
491
492 if (start != SZ_64M || end != SZ_64M + SZ_8M - 1)
493 test_err("error finding exact range: start %llu end %llu",
494 start, end);
495
496 find_first_clear_extent_bit(&tree, SZ_64M - SZ_8M, &start, &end,
497 CHUNK_TRIMMED);
498
499
500
501
502
503 if (start != SZ_64M || end != SZ_64M + SZ_8M - 1)
504 test_err("error finding next alloc range: start %llu end %llu",
505 start, end);
506
507
508
509
510
511 find_first_clear_extent_bit(&tree, -1, &start, &end, CHUNK_TRIMMED);
512 if (start != SZ_64M + SZ_8M || end != -1)
513 test_err(
514 "error handling beyond end of range search: start %llu end %llu",
515 start, end);
516
517 return 0;
518}
519
520int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
521{
522 int ret;
523
524 test_msg("running extent I/O tests");
525
526 ret = test_find_delalloc(sectorsize);
527 if (ret)
528 goto out;
529
530 ret = test_find_first_clear_extent_bit();
531 if (ret)
532 goto out;
533
534 ret = test_eb_bitmaps(sectorsize, nodesize);
535out:
536 return ret;
537}
538