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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2017 Oracle. All rights reserved.
4 */
5
6#include <linux/types.h>
7#include "btrfs-tests.h"
8#include "../ctree.h"
9#include "../btrfs_inode.h"
10#include "../volumes.h"
11#include "../disk-io.h"
12#include "../block-group.h"
13
14static void free_extent_map_tree(struct extent_map_tree *em_tree)
15{
16 struct extent_map *em;
17 struct rb_node *node;
18
19 write_lock(&em_tree->lock);
20 while (!RB_EMPTY_ROOT(&em_tree->map.rb_root)) {
21 node = rb_first_cached(&em_tree->map);
22 em = rb_entry(node, struct extent_map, rb_node);
23 remove_extent_mapping(em_tree, em);
24
25#ifdef CONFIG_BTRFS_DEBUG
26 if (refcount_read(&em->refs) != 1) {
27 test_err(
28"em leak: em (start %llu len %llu block_start %llu block_len %llu) refs %d",
29 em->start, em->len, em->block_start,
30 em->block_len, refcount_read(&em->refs));
31
32 refcount_set(&em->refs, 1);
33 }
34#endif
35 free_extent_map(em);
36 }
37 write_unlock(&em_tree->lock);
38}
39
40/*
41 * Test scenario:
42 *
43 * Suppose that no extent map has been loaded into memory yet, there is a file
44 * extent [0, 16K), followed by another file extent [16K, 20K), two dio reads
45 * are entering btrfs_get_extent() concurrently, t1 is reading [8K, 16K), t2 is
46 * reading [0, 8K)
47 *
48 * t1 t2
49 * btrfs_get_extent() btrfs_get_extent()
50 * -> lookup_extent_mapping() ->lookup_extent_mapping()
51 * -> add_extent_mapping(0, 16K)
52 * -> return em
53 * ->add_extent_mapping(0, 16K)
54 * -> #handle -EEXIST
55 */
56static int test_case_1(struct btrfs_fs_info *fs_info,
57 struct extent_map_tree *em_tree)
58{
59 struct extent_map *em;
60 u64 start = 0;
61 u64 len = SZ_8K;
62 int ret;
63
64 em = alloc_extent_map();
65 if (!em) {
66 test_std_err(TEST_ALLOC_EXTENT_MAP);
67 return -ENOMEM;
68 }
69
70 /* Add [0, 16K) */
71 em->start = 0;
72 em->len = SZ_16K;
73 em->block_start = 0;
74 em->block_len = SZ_16K;
75 write_lock(&em_tree->lock);
76 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
77 write_unlock(&em_tree->lock);
78 if (ret < 0) {
79 test_err("cannot add extent range [0, 16K)");
80 goto out;
81 }
82 free_extent_map(em);
83
84 /* Add [16K, 20K) following [0, 16K) */
85 em = alloc_extent_map();
86 if (!em) {
87 test_std_err(TEST_ALLOC_EXTENT_MAP);
88 ret = -ENOMEM;
89 goto out;
90 }
91
92 em->start = SZ_16K;
93 em->len = SZ_4K;
94 em->block_start = SZ_32K; /* avoid merging */
95 em->block_len = SZ_4K;
96 write_lock(&em_tree->lock);
97 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
98 write_unlock(&em_tree->lock);
99 if (ret < 0) {
100 test_err("cannot add extent range [16K, 20K)");
101 goto out;
102 }
103 free_extent_map(em);
104
105 em = alloc_extent_map();
106 if (!em) {
107 test_std_err(TEST_ALLOC_EXTENT_MAP);
108 ret = -ENOMEM;
109 goto out;
110 }
111
112 /* Add [0, 8K), should return [0, 16K) instead. */
113 em->start = start;
114 em->len = len;
115 em->block_start = start;
116 em->block_len = len;
117 write_lock(&em_tree->lock);
118 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
119 write_unlock(&em_tree->lock);
120 if (ret) {
121 test_err("case1 [%llu %llu]: ret %d", start, start + len, ret);
122 goto out;
123 }
124 if (!em) {
125 test_err("case1 [%llu %llu]: no extent map returned",
126 start, start + len);
127 ret = -ENOENT;
128 goto out;
129 }
130 if (em->start != 0 || extent_map_end(em) != SZ_16K ||
131 em->block_start != 0 || em->block_len != SZ_16K) {
132 test_err(
133"case1 [%llu %llu]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
134 start, start + len, ret, em->start, em->len,
135 em->block_start, em->block_len);
136 ret = -EINVAL;
137 }
138 free_extent_map(em);
139out:
140 free_extent_map_tree(em_tree);
141
142 return ret;
143}
144
145/*
146 * Test scenario:
147 *
148 * Reading the inline ending up with EEXIST, ie. read an inline
149 * extent and discard page cache and read it again.
150 */
151static int test_case_2(struct btrfs_fs_info *fs_info,
152 struct extent_map_tree *em_tree)
153{
154 struct extent_map *em;
155 int ret;
156
157 em = alloc_extent_map();
158 if (!em) {
159 test_std_err(TEST_ALLOC_EXTENT_MAP);
160 return -ENOMEM;
161 }
162
163 /* Add [0, 1K) */
164 em->start = 0;
165 em->len = SZ_1K;
166 em->block_start = EXTENT_MAP_INLINE;
167 em->block_len = (u64)-1;
168 write_lock(&em_tree->lock);
169 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
170 write_unlock(&em_tree->lock);
171 if (ret < 0) {
172 test_err("cannot add extent range [0, 1K)");
173 goto out;
174 }
175 free_extent_map(em);
176
177 /* Add [4K, 8K) following [0, 1K) */
178 em = alloc_extent_map();
179 if (!em) {
180 test_std_err(TEST_ALLOC_EXTENT_MAP);
181 ret = -ENOMEM;
182 goto out;
183 }
184
185 em->start = SZ_4K;
186 em->len = SZ_4K;
187 em->block_start = SZ_4K;
188 em->block_len = SZ_4K;
189 write_lock(&em_tree->lock);
190 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
191 write_unlock(&em_tree->lock);
192 if (ret < 0) {
193 test_err("cannot add extent range [4K, 8K)");
194 goto out;
195 }
196 free_extent_map(em);
197
198 em = alloc_extent_map();
199 if (!em) {
200 test_std_err(TEST_ALLOC_EXTENT_MAP);
201 ret = -ENOMEM;
202 goto out;
203 }
204
205 /* Add [0, 1K) */
206 em->start = 0;
207 em->len = SZ_1K;
208 em->block_start = EXTENT_MAP_INLINE;
209 em->block_len = (u64)-1;
210 write_lock(&em_tree->lock);
211 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
212 write_unlock(&em_tree->lock);
213 if (ret) {
214 test_err("case2 [0 1K]: ret %d", ret);
215 goto out;
216 }
217 if (!em) {
218 test_err("case2 [0 1K]: no extent map returned");
219 ret = -ENOENT;
220 goto out;
221 }
222 if (em->start != 0 || extent_map_end(em) != SZ_1K ||
223 em->block_start != EXTENT_MAP_INLINE || em->block_len != (u64)-1) {
224 test_err(
225"case2 [0 1K]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
226 ret, em->start, em->len, em->block_start,
227 em->block_len);
228 ret = -EINVAL;
229 }
230 free_extent_map(em);
231out:
232 free_extent_map_tree(em_tree);
233
234 return ret;
235}
236
237static int __test_case_3(struct btrfs_fs_info *fs_info,
238 struct extent_map_tree *em_tree, u64 start)
239{
240 struct extent_map *em;
241 u64 len = SZ_4K;
242 int ret;
243
244 em = alloc_extent_map();
245 if (!em) {
246 test_std_err(TEST_ALLOC_EXTENT_MAP);
247 return -ENOMEM;
248 }
249
250 /* Add [4K, 8K) */
251 em->start = SZ_4K;
252 em->len = SZ_4K;
253 em->block_start = SZ_4K;
254 em->block_len = SZ_4K;
255 write_lock(&em_tree->lock);
256 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
257 write_unlock(&em_tree->lock);
258 if (ret < 0) {
259 test_err("cannot add extent range [4K, 8K)");
260 goto out;
261 }
262 free_extent_map(em);
263
264 em = alloc_extent_map();
265 if (!em) {
266 test_std_err(TEST_ALLOC_EXTENT_MAP);
267 ret = -ENOMEM;
268 goto out;
269 }
270
271 /* Add [0, 16K) */
272 em->start = 0;
273 em->len = SZ_16K;
274 em->block_start = 0;
275 em->block_len = SZ_16K;
276 write_lock(&em_tree->lock);
277 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
278 write_unlock(&em_tree->lock);
279 if (ret) {
280 test_err("case3 [%llu %llu): ret %d",
281 start, start + len, ret);
282 goto out;
283 }
284 if (!em) {
285 test_err("case3 [%llu %llu): no extent map returned",
286 start, start + len);
287 ret = -ENOENT;
288 goto out;
289 }
290 /*
291 * Since bytes within em are contiguous, em->block_start is identical to
292 * em->start.
293 */
294 if (start < em->start || start + len > extent_map_end(em) ||
295 em->start != em->block_start || em->len != em->block_len) {
296 test_err(
297"case3 [%llu %llu): ret %d em (start %llu len %llu block_start %llu block_len %llu)",
298 start, start + len, ret, em->start, em->len,
299 em->block_start, em->block_len);
300 ret = -EINVAL;
301 }
302 free_extent_map(em);
303out:
304 free_extent_map_tree(em_tree);
305
306 return ret;
307}
308
309/*
310 * Test scenario:
311 *
312 * Suppose that no extent map has been loaded into memory yet.
313 * There is a file extent [0, 16K), two jobs are running concurrently
314 * against it, t1 is buffered writing to [4K, 8K) and t2 is doing dio
315 * read from [0, 4K) or [8K, 12K) or [12K, 16K).
316 *
317 * t1 goes ahead of t2 and adds em [4K, 8K) into tree.
318 *
319 * t1 t2
320 * cow_file_range() btrfs_get_extent()
321 * -> lookup_extent_mapping()
322 * -> add_extent_mapping()
323 * -> add_extent_mapping()
324 */
325static int test_case_3(struct btrfs_fs_info *fs_info,
326 struct extent_map_tree *em_tree)
327{
328 int ret;
329
330 ret = __test_case_3(fs_info, em_tree, 0);
331 if (ret)
332 return ret;
333 ret = __test_case_3(fs_info, em_tree, SZ_8K);
334 if (ret)
335 return ret;
336 ret = __test_case_3(fs_info, em_tree, (12 * SZ_1K));
337
338 return ret;
339}
340
341static int __test_case_4(struct btrfs_fs_info *fs_info,
342 struct extent_map_tree *em_tree, u64 start)
343{
344 struct extent_map *em;
345 u64 len = SZ_4K;
346 int ret;
347
348 em = alloc_extent_map();
349 if (!em) {
350 test_std_err(TEST_ALLOC_EXTENT_MAP);
351 return -ENOMEM;
352 }
353
354 /* Add [0K, 8K) */
355 em->start = 0;
356 em->len = SZ_8K;
357 em->block_start = 0;
358 em->block_len = SZ_8K;
359 write_lock(&em_tree->lock);
360 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
361 write_unlock(&em_tree->lock);
362 if (ret < 0) {
363 test_err("cannot add extent range [0, 8K)");
364 goto out;
365 }
366 free_extent_map(em);
367
368 em = alloc_extent_map();
369 if (!em) {
370 test_std_err(TEST_ALLOC_EXTENT_MAP);
371 ret = -ENOMEM;
372 goto out;
373 }
374
375 /* Add [8K, 32K) */
376 em->start = SZ_8K;
377 em->len = 24 * SZ_1K;
378 em->block_start = SZ_16K; /* avoid merging */
379 em->block_len = 24 * SZ_1K;
380 write_lock(&em_tree->lock);
381 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
382 write_unlock(&em_tree->lock);
383 if (ret < 0) {
384 test_err("cannot add extent range [8K, 32K)");
385 goto out;
386 }
387 free_extent_map(em);
388
389 em = alloc_extent_map();
390 if (!em) {
391 test_std_err(TEST_ALLOC_EXTENT_MAP);
392 ret = -ENOMEM;
393 goto out;
394 }
395 /* Add [0K, 32K) */
396 em->start = 0;
397 em->len = SZ_32K;
398 em->block_start = 0;
399 em->block_len = SZ_32K;
400 write_lock(&em_tree->lock);
401 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
402 write_unlock(&em_tree->lock);
403 if (ret) {
404 test_err("case4 [%llu %llu): ret %d",
405 start, start + len, ret);
406 goto out;
407 }
408 if (!em) {
409 test_err("case4 [%llu %llu): no extent map returned",
410 start, start + len);
411 ret = -ENOENT;
412 goto out;
413 }
414 if (start < em->start || start + len > extent_map_end(em)) {
415 test_err(
416"case4 [%llu %llu): ret %d, added wrong em (start %llu len %llu block_start %llu block_len %llu)",
417 start, start + len, ret, em->start, em->len, em->block_start,
418 em->block_len);
419 ret = -EINVAL;
420 }
421 free_extent_map(em);
422out:
423 free_extent_map_tree(em_tree);
424
425 return ret;
426}
427
428/*
429 * Test scenario:
430 *
431 * Suppose that no extent map has been loaded into memory yet.
432 * There is a file extent [0, 32K), two jobs are running concurrently
433 * against it, t1 is doing dio write to [8K, 32K) and t2 is doing dio
434 * read from [0, 4K) or [4K, 8K).
435 *
436 * t1 goes ahead of t2 and splits em [0, 32K) to em [0K, 8K) and [8K 32K).
437 *
438 * t1 t2
439 * btrfs_get_blocks_direct() btrfs_get_blocks_direct()
440 * -> btrfs_get_extent() -> btrfs_get_extent()
441 * -> lookup_extent_mapping()
442 * -> add_extent_mapping() -> lookup_extent_mapping()
443 * # load [0, 32K)
444 * -> btrfs_new_extent_direct()
445 * -> btrfs_drop_extent_cache()
446 * # split [0, 32K)
447 * -> add_extent_mapping()
448 * # add [8K, 32K)
449 * -> add_extent_mapping()
450 * # handle -EEXIST when adding
451 * # [0, 32K)
452 */
453static int test_case_4(struct btrfs_fs_info *fs_info,
454 struct extent_map_tree *em_tree)
455{
456 int ret;
457
458 ret = __test_case_4(fs_info, em_tree, 0);
459 if (ret)
460 return ret;
461 ret = __test_case_4(fs_info, em_tree, SZ_4K);
462
463 return ret;
464}
465
466static int add_compressed_extent(struct btrfs_fs_info *fs_info,
467 struct extent_map_tree *em_tree,
468 u64 start, u64 len, u64 block_start)
469{
470 struct extent_map *em;
471 int ret;
472
473 em = alloc_extent_map();
474 if (!em) {
475 test_std_err(TEST_ALLOC_EXTENT_MAP);
476 return -ENOMEM;
477 }
478
479 em->start = start;
480 em->len = len;
481 em->block_start = block_start;
482 em->block_len = SZ_4K;
483 em->flags |= EXTENT_FLAG_COMPRESS_ZLIB;
484 write_lock(&em_tree->lock);
485 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
486 write_unlock(&em_tree->lock);
487 free_extent_map(em);
488 if (ret < 0) {
489 test_err("cannot add extent map [%llu, %llu)", start, start + len);
490 return ret;
491 }
492
493 return 0;
494}
495
496struct extent_range {
497 u64 start;
498 u64 len;
499};
500
501/* The valid states of the tree after every drop, as described below. */
502struct extent_range valid_ranges[][7] = {
503 {
504 { .start = 0, .len = SZ_8K }, /* [0, 8K) */
505 { .start = SZ_4K * 3, .len = SZ_4K * 3}, /* [12k, 24k) */
506 { .start = SZ_4K * 6, .len = SZ_4K * 3}, /* [24k, 36k) */
507 { .start = SZ_32K + SZ_4K, .len = SZ_4K}, /* [36k, 40k) */
508 { .start = SZ_4K * 10, .len = SZ_4K * 6}, /* [40k, 64k) */
509 },
510 {
511 { .start = 0, .len = SZ_8K }, /* [0, 8K) */
512 { .start = SZ_4K * 5, .len = SZ_4K}, /* [20k, 24k) */
513 { .start = SZ_4K * 6, .len = SZ_4K * 3}, /* [24k, 36k) */
514 { .start = SZ_32K + SZ_4K, .len = SZ_4K}, /* [36k, 40k) */
515 { .start = SZ_4K * 10, .len = SZ_4K * 6}, /* [40k, 64k) */
516 },
517 {
518 { .start = 0, .len = SZ_8K }, /* [0, 8K) */
519 { .start = SZ_4K * 5, .len = SZ_4K}, /* [20k, 24k) */
520 { .start = SZ_4K * 6, .len = SZ_4K}, /* [24k, 28k) */
521 { .start = SZ_32K, .len = SZ_4K}, /* [32k, 36k) */
522 { .start = SZ_32K + SZ_4K, .len = SZ_4K}, /* [36k, 40k) */
523 { .start = SZ_4K * 10, .len = SZ_4K * 6}, /* [40k, 64k) */
524 },
525 {
526 { .start = 0, .len = SZ_8K}, /* [0, 8K) */
527 { .start = SZ_4K * 5, .len = SZ_4K}, /* [20k, 24k) */
528 { .start = SZ_4K * 6, .len = SZ_4K}, /* [24k, 28k) */
529 }
530};
531
532static int validate_range(struct extent_map_tree *em_tree, int index)
533{
534 struct rb_node *n;
535 int i;
536
537 for (i = 0, n = rb_first_cached(&em_tree->map);
538 valid_ranges[index][i].len && n;
539 i++, n = rb_next(n)) {
540 struct extent_map *entry = rb_entry(n, struct extent_map, rb_node);
541
542 if (entry->start != valid_ranges[index][i].start) {
543 test_err("mapping has start %llu expected %llu",
544 entry->start, valid_ranges[index][i].start);
545 return -EINVAL;
546 }
547
548 if (entry->len != valid_ranges[index][i].len) {
549 test_err("mapping has len %llu expected %llu",
550 entry->len, valid_ranges[index][i].len);
551 return -EINVAL;
552 }
553 }
554
555 /*
556 * We exited because we don't have any more entries in the extent_map
557 * but we still expect more valid entries.
558 */
559 if (valid_ranges[index][i].len) {
560 test_err("missing an entry");
561 return -EINVAL;
562 }
563
564 /* We exited the loop but still have entries in the extent map. */
565 if (n) {
566 test_err("we have a left over entry in the extent map we didn't expect");
567 return -EINVAL;
568 }
569
570 return 0;
571}
572
573/*
574 * Test scenario:
575 *
576 * Test the various edge cases of btrfs_drop_extent_map_range, create the
577 * following ranges
578 *
579 * [0, 12k)[12k, 24k)[24k, 36k)[36k, 40k)[40k,64k)
580 *
581 * And then we'll drop:
582 *
583 * [8k, 12k) - test the single front split
584 * [12k, 20k) - test the single back split
585 * [28k, 32k) - test the double split
586 * [32k, 64k) - test whole em dropping
587 *
588 * They'll have the EXTENT_FLAG_COMPRESSED flag set to keep the em tree from
589 * merging the em's.
590 */
591static int test_case_5(struct btrfs_fs_info *fs_info)
592{
593 struct extent_map_tree *em_tree;
594 struct inode *inode;
595 u64 start, end;
596 int ret;
597
598 test_msg("Running btrfs_drop_extent_map_range tests");
599
600 inode = btrfs_new_test_inode();
601 if (!inode) {
602 test_std_err(TEST_ALLOC_INODE);
603 return -ENOMEM;
604 }
605
606 em_tree = &BTRFS_I(inode)->extent_tree;
607
608 /* [0, 12k) */
609 ret = add_compressed_extent(fs_info, em_tree, 0, SZ_4K * 3, 0);
610 if (ret) {
611 test_err("cannot add extent range [0, 12K)");
612 goto out;
613 }
614
615 /* [12k, 24k) */
616 ret = add_compressed_extent(fs_info, em_tree, SZ_4K * 3, SZ_4K * 3, SZ_4K);
617 if (ret) {
618 test_err("cannot add extent range [12k, 24k)");
619 goto out;
620 }
621
622 /* [24k, 36k) */
623 ret = add_compressed_extent(fs_info, em_tree, SZ_4K * 6, SZ_4K * 3, SZ_8K);
624 if (ret) {
625 test_err("cannot add extent range [12k, 24k)");
626 goto out;
627 }
628
629 /* [36k, 40k) */
630 ret = add_compressed_extent(fs_info, em_tree, SZ_32K + SZ_4K, SZ_4K, SZ_4K * 3);
631 if (ret) {
632 test_err("cannot add extent range [12k, 24k)");
633 goto out;
634 }
635
636 /* [40k, 64k) */
637 ret = add_compressed_extent(fs_info, em_tree, SZ_4K * 10, SZ_4K * 6, SZ_16K);
638 if (ret) {
639 test_err("cannot add extent range [12k, 24k)");
640 goto out;
641 }
642
643 /* Drop [8k, 12k) */
644 start = SZ_8K;
645 end = (3 * SZ_4K) - 1;
646 btrfs_drop_extent_map_range(BTRFS_I(inode), start, end, false);
647 ret = validate_range(&BTRFS_I(inode)->extent_tree, 0);
648 if (ret)
649 goto out;
650
651 /* Drop [12k, 20k) */
652 start = SZ_4K * 3;
653 end = SZ_16K + SZ_4K - 1;
654 btrfs_drop_extent_map_range(BTRFS_I(inode), start, end, false);
655 ret = validate_range(&BTRFS_I(inode)->extent_tree, 1);
656 if (ret)
657 goto out;
658
659 /* Drop [28k, 32k) */
660 start = SZ_32K - SZ_4K;
661 end = SZ_32K - 1;
662 btrfs_drop_extent_map_range(BTRFS_I(inode), start, end, false);
663 ret = validate_range(&BTRFS_I(inode)->extent_tree, 2);
664 if (ret)
665 goto out;
666
667 /* Drop [32k, 64k) */
668 start = SZ_32K;
669 end = SZ_64K - 1;
670 btrfs_drop_extent_map_range(BTRFS_I(inode), start, end, false);
671 ret = validate_range(&BTRFS_I(inode)->extent_tree, 3);
672 if (ret)
673 goto out;
674out:
675 iput(inode);
676 return ret;
677}
678
679/*
680 * Test the btrfs_add_extent_mapping helper which will attempt to create an em
681 * for areas between two existing ems. Validate it doesn't do this when there
682 * are two unmerged em's side by side.
683 */
684static int test_case_6(struct btrfs_fs_info *fs_info, struct extent_map_tree *em_tree)
685{
686 struct extent_map *em = NULL;
687 int ret;
688
689 ret = add_compressed_extent(fs_info, em_tree, 0, SZ_4K, 0);
690 if (ret)
691 goto out;
692
693 ret = add_compressed_extent(fs_info, em_tree, SZ_4K, SZ_4K, 0);
694 if (ret)
695 goto out;
696
697 em = alloc_extent_map();
698 if (!em) {
699 test_std_err(TEST_ALLOC_EXTENT_MAP);
700 return -ENOMEM;
701 }
702
703 em->start = SZ_4K;
704 em->len = SZ_4K;
705 em->block_start = SZ_16K;
706 em->block_len = SZ_16K;
707 write_lock(&em_tree->lock);
708 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, 0, SZ_8K);
709 write_unlock(&em_tree->lock);
710
711 if (ret != 0) {
712 test_err("got an error when adding our em: %d", ret);
713 goto out;
714 }
715
716 ret = -EINVAL;
717 if (em->start != 0) {
718 test_err("unexpected em->start at %llu, wanted 0", em->start);
719 goto out;
720 }
721 if (em->len != SZ_4K) {
722 test_err("unexpected em->len %llu, expected 4K", em->len);
723 goto out;
724 }
725 ret = 0;
726out:
727 free_extent_map(em);
728 free_extent_map_tree(em_tree);
729 return ret;
730}
731
732/*
733 * Regression test for btrfs_drop_extent_map_range. Calling with skip_pinned ==
734 * true would mess up the start/end calculations and subsequent splits would be
735 * incorrect.
736 */
737static int test_case_7(struct btrfs_fs_info *fs_info)
738{
739 struct extent_map_tree *em_tree;
740 struct extent_map *em;
741 struct inode *inode;
742 int ret;
743
744 test_msg("Running btrfs_drop_extent_cache with pinned");
745
746 inode = btrfs_new_test_inode();
747 if (!inode) {
748 test_std_err(TEST_ALLOC_INODE);
749 return -ENOMEM;
750 }
751
752 em_tree = &BTRFS_I(inode)->extent_tree;
753
754 em = alloc_extent_map();
755 if (!em) {
756 test_std_err(TEST_ALLOC_EXTENT_MAP);
757 ret = -ENOMEM;
758 goto out;
759 }
760
761 /* [0, 16K), pinned */
762 em->start = 0;
763 em->len = SZ_16K;
764 em->block_start = 0;
765 em->block_len = SZ_4K;
766 em->flags |= EXTENT_FLAG_PINNED;
767 write_lock(&em_tree->lock);
768 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
769 write_unlock(&em_tree->lock);
770 if (ret < 0) {
771 test_err("couldn't add extent map");
772 goto out;
773 }
774 free_extent_map(em);
775
776 em = alloc_extent_map();
777 if (!em) {
778 test_std_err(TEST_ALLOC_EXTENT_MAP);
779 ret = -ENOMEM;
780 goto out;
781 }
782
783 /* [32K, 48K), not pinned */
784 em->start = SZ_32K;
785 em->len = SZ_16K;
786 em->block_start = SZ_32K;
787 em->block_len = SZ_16K;
788 write_lock(&em_tree->lock);
789 ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
790 write_unlock(&em_tree->lock);
791 if (ret < 0) {
792 test_err("couldn't add extent map");
793 goto out;
794 }
795 free_extent_map(em);
796
797 /*
798 * Drop [0, 36K) This should skip the [0, 4K) extent and then split the
799 * [32K, 48K) extent.
800 */
801 btrfs_drop_extent_map_range(BTRFS_I(inode), 0, (36 * SZ_1K) - 1, true);
802
803 /* Make sure our extent maps look sane. */
804 ret = -EINVAL;
805
806 em = lookup_extent_mapping(em_tree, 0, SZ_16K);
807 if (!em) {
808 test_err("didn't find an em at 0 as expected");
809 goto out;
810 }
811
812 if (em->start != 0) {
813 test_err("em->start is %llu, expected 0", em->start);
814 goto out;
815 }
816
817 if (em->len != SZ_16K) {
818 test_err("em->len is %llu, expected 16K", em->len);
819 goto out;
820 }
821
822 free_extent_map(em);
823
824 read_lock(&em_tree->lock);
825 em = lookup_extent_mapping(em_tree, SZ_16K, SZ_16K);
826 read_unlock(&em_tree->lock);
827 if (em) {
828 test_err("found an em when we weren't expecting one");
829 goto out;
830 }
831
832 read_lock(&em_tree->lock);
833 em = lookup_extent_mapping(em_tree, SZ_32K, SZ_16K);
834 read_unlock(&em_tree->lock);
835 if (!em) {
836 test_err("didn't find an em at 32K as expected");
837 goto out;
838 }
839
840 if (em->start != (36 * SZ_1K)) {
841 test_err("em->start is %llu, expected 36K", em->start);
842 goto out;
843 }
844
845 if (em->len != (12 * SZ_1K)) {
846 test_err("em->len is %llu, expected 12K", em->len);
847 goto out;
848 }
849
850 free_extent_map(em);
851
852 read_lock(&em_tree->lock);
853 em = lookup_extent_mapping(em_tree, 48 * SZ_1K, (u64)-1);
854 read_unlock(&em_tree->lock);
855 if (em) {
856 test_err("found an unexpected em above 48K");
857 goto out;
858 }
859
860 ret = 0;
861out:
862 free_extent_map(em);
863 iput(inode);
864 return ret;
865}
866
867struct rmap_test_vector {
868 u64 raid_type;
869 u64 physical_start;
870 u64 data_stripe_size;
871 u64 num_data_stripes;
872 u64 num_stripes;
873 /* Assume we won't have more than 5 physical stripes */
874 u64 data_stripe_phys_start[5];
875 bool expected_mapped_addr;
876 /* Physical to logical addresses */
877 u64 mapped_logical[5];
878};
879
880static int test_rmap_block(struct btrfs_fs_info *fs_info,
881 struct rmap_test_vector *test)
882{
883 struct btrfs_chunk_map *map;
884 u64 *logical = NULL;
885 int i, out_ndaddrs, out_stripe_len;
886 int ret;
887
888 map = btrfs_alloc_chunk_map(test->num_stripes, GFP_KERNEL);
889 if (!map) {
890 test_std_err(TEST_ALLOC_CHUNK_MAP);
891 return -ENOMEM;
892 }
893
894 /* Start at 4GiB logical address */
895 map->start = SZ_4G;
896 map->chunk_len = test->data_stripe_size * test->num_data_stripes;
897 map->stripe_size = test->data_stripe_size;
898 map->num_stripes = test->num_stripes;
899 map->type = test->raid_type;
900
901 for (i = 0; i < map->num_stripes; i++) {
902 struct btrfs_device *dev = btrfs_alloc_dummy_device(fs_info);
903
904 if (IS_ERR(dev)) {
905 test_err("cannot allocate device");
906 ret = PTR_ERR(dev);
907 goto out;
908 }
909 map->stripes[i].dev = dev;
910 map->stripes[i].physical = test->data_stripe_phys_start[i];
911 }
912
913 ret = btrfs_add_chunk_map(fs_info, map);
914 if (ret) {
915 test_err("error adding chunk map to mapping tree");
916 goto out_free;
917 }
918
919 ret = btrfs_rmap_block(fs_info, map->start, btrfs_sb_offset(1),
920 &logical, &out_ndaddrs, &out_stripe_len);
921 if (ret || (out_ndaddrs == 0 && test->expected_mapped_addr)) {
922 test_err("didn't rmap anything but expected %d",
923 test->expected_mapped_addr);
924 goto out;
925 }
926
927 if (out_stripe_len != BTRFS_STRIPE_LEN) {
928 test_err("calculated stripe length doesn't match");
929 goto out;
930 }
931
932 if (out_ndaddrs != test->expected_mapped_addr) {
933 for (i = 0; i < out_ndaddrs; i++)
934 test_msg("mapped %llu", logical[i]);
935 test_err("unexpected number of mapped addresses: %d", out_ndaddrs);
936 goto out;
937 }
938
939 for (i = 0; i < out_ndaddrs; i++) {
940 if (logical[i] != test->mapped_logical[i]) {
941 test_err("unexpected logical address mapped");
942 goto out;
943 }
944 }
945
946 ret = 0;
947out:
948 btrfs_remove_chunk_map(fs_info, map);
949out_free:
950 kfree(logical);
951 return ret;
952}
953
954int btrfs_test_extent_map(void)
955{
956 struct btrfs_fs_info *fs_info = NULL;
957 struct extent_map_tree *em_tree;
958 int ret = 0, i;
959 struct rmap_test_vector rmap_tests[] = {
960 {
961 /*
962 * Test a chunk with 2 data stripes one of which
963 * intersects the physical address of the super block
964 * is correctly recognised.
965 */
966 .raid_type = BTRFS_BLOCK_GROUP_RAID1,
967 .physical_start = SZ_64M - SZ_4M,
968 .data_stripe_size = SZ_256M,
969 .num_data_stripes = 2,
970 .num_stripes = 2,
971 .data_stripe_phys_start =
972 {SZ_64M - SZ_4M, SZ_64M - SZ_4M + SZ_256M},
973 .expected_mapped_addr = true,
974 .mapped_logical= {SZ_4G + SZ_4M}
975 },
976 {
977 /*
978 * Test that out-of-range physical addresses are
979 * ignored
980 */
981
982 /* SINGLE chunk type */
983 .raid_type = 0,
984 .physical_start = SZ_4G,
985 .data_stripe_size = SZ_256M,
986 .num_data_stripes = 1,
987 .num_stripes = 1,
988 .data_stripe_phys_start = {SZ_256M},
989 .expected_mapped_addr = false,
990 .mapped_logical = {0}
991 }
992 };
993
994 test_msg("running extent_map tests");
995
996 /*
997 * Note: the fs_info is not set up completely, we only need
998 * fs_info::fsid for the tracepoint.
999 */
1000 fs_info = btrfs_alloc_dummy_fs_info(PAGE_SIZE, PAGE_SIZE);
1001 if (!fs_info) {
1002 test_std_err(TEST_ALLOC_FS_INFO);
1003 return -ENOMEM;
1004 }
1005
1006 em_tree = kzalloc(sizeof(*em_tree), GFP_KERNEL);
1007 if (!em_tree) {
1008 ret = -ENOMEM;
1009 goto out;
1010 }
1011
1012 extent_map_tree_init(em_tree);
1013
1014 ret = test_case_1(fs_info, em_tree);
1015 if (ret)
1016 goto out;
1017 ret = test_case_2(fs_info, em_tree);
1018 if (ret)
1019 goto out;
1020 ret = test_case_3(fs_info, em_tree);
1021 if (ret)
1022 goto out;
1023 ret = test_case_4(fs_info, em_tree);
1024 if (ret)
1025 goto out;
1026 ret = test_case_5(fs_info);
1027 if (ret)
1028 goto out;
1029 ret = test_case_6(fs_info, em_tree);
1030 if (ret)
1031 goto out;
1032 ret = test_case_7(fs_info);
1033 if (ret)
1034 goto out;
1035
1036 test_msg("running rmap tests");
1037 for (i = 0; i < ARRAY_SIZE(rmap_tests); i++) {
1038 ret = test_rmap_block(fs_info, &rmap_tests[i]);
1039 if (ret)
1040 goto out;
1041 }
1042
1043out:
1044 kfree(em_tree);
1045 btrfs_free_dummy_fs_info(fs_info);
1046
1047 return ret;
1048}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2017 Oracle. All rights reserved.
4 */
5
6#include <linux/types.h>
7#include "btrfs-tests.h"
8#include "../ctree.h"
9#include "../btrfs_inode.h"
10#include "../volumes.h"
11#include "../disk-io.h"
12#include "../block-group.h"
13
14static int free_extent_map_tree(struct btrfs_inode *inode)
15{
16 struct extent_map_tree *em_tree = &inode->extent_tree;
17 struct extent_map *em;
18 struct rb_node *node;
19 int ret = 0;
20
21 write_lock(&em_tree->lock);
22 while (!RB_EMPTY_ROOT(&em_tree->root)) {
23 node = rb_first(&em_tree->root);
24 em = rb_entry(node, struct extent_map, rb_node);
25 remove_extent_mapping(inode, em);
26
27#ifdef CONFIG_BTRFS_DEBUG
28 if (refcount_read(&em->refs) != 1) {
29 ret = -EINVAL;
30 test_err(
31"em leak: em (start %llu len %llu disk_bytenr %llu disk_num_bytes %llu offset %llu) refs %d",
32 em->start, em->len, em->disk_bytenr,
33 em->disk_num_bytes, em->offset,
34 refcount_read(&em->refs));
35
36 refcount_set(&em->refs, 1);
37 }
38#endif
39 free_extent_map(em);
40 }
41 write_unlock(&em_tree->lock);
42
43 return ret;
44}
45
46/*
47 * Test scenario:
48 *
49 * Suppose that no extent map has been loaded into memory yet, there is a file
50 * extent [0, 16K), followed by another file extent [16K, 20K), two dio reads
51 * are entering btrfs_get_extent() concurrently, t1 is reading [8K, 16K), t2 is
52 * reading [0, 8K)
53 *
54 * t1 t2
55 * btrfs_get_extent() btrfs_get_extent()
56 * -> lookup_extent_mapping() ->lookup_extent_mapping()
57 * -> add_extent_mapping(0, 16K)
58 * -> return em
59 * ->add_extent_mapping(0, 16K)
60 * -> #handle -EEXIST
61 */
62static int test_case_1(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
63{
64 struct extent_map_tree *em_tree = &inode->extent_tree;
65 struct extent_map *em;
66 u64 start = 0;
67 u64 len = SZ_8K;
68 int ret;
69 int ret2;
70
71 em = alloc_extent_map();
72 if (!em) {
73 test_std_err(TEST_ALLOC_EXTENT_MAP);
74 return -ENOMEM;
75 }
76
77 /* Add [0, 16K) */
78 em->start = 0;
79 em->len = SZ_16K;
80 em->disk_bytenr = 0;
81 em->disk_num_bytes = SZ_16K;
82 em->ram_bytes = SZ_16K;
83 write_lock(&em_tree->lock);
84 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
85 write_unlock(&em_tree->lock);
86 if (ret < 0) {
87 test_err("cannot add extent range [0, 16K)");
88 goto out;
89 }
90 free_extent_map(em);
91
92 /* Add [16K, 20K) following [0, 16K) */
93 em = alloc_extent_map();
94 if (!em) {
95 test_std_err(TEST_ALLOC_EXTENT_MAP);
96 ret = -ENOMEM;
97 goto out;
98 }
99
100 em->start = SZ_16K;
101 em->len = SZ_4K;
102 em->disk_bytenr = SZ_32K; /* avoid merging */
103 em->disk_num_bytes = SZ_4K;
104 em->ram_bytes = SZ_4K;
105 write_lock(&em_tree->lock);
106 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
107 write_unlock(&em_tree->lock);
108 if (ret < 0) {
109 test_err("cannot add extent range [16K, 20K)");
110 goto out;
111 }
112 free_extent_map(em);
113
114 em = alloc_extent_map();
115 if (!em) {
116 test_std_err(TEST_ALLOC_EXTENT_MAP);
117 ret = -ENOMEM;
118 goto out;
119 }
120
121 /* Add [0, 8K), should return [0, 16K) instead. */
122 em->start = start;
123 em->len = len;
124 em->disk_bytenr = start;
125 em->disk_num_bytes = len;
126 em->ram_bytes = len;
127 write_lock(&em_tree->lock);
128 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
129 write_unlock(&em_tree->lock);
130 if (ret) {
131 test_err("case1 [%llu %llu]: ret %d", start, start + len, ret);
132 goto out;
133 }
134 if (!em) {
135 test_err("case1 [%llu %llu]: no extent map returned",
136 start, start + len);
137 ret = -ENOENT;
138 goto out;
139 }
140 if (em->start != 0 || extent_map_end(em) != SZ_16K ||
141 em->disk_bytenr != 0 || em->disk_num_bytes != SZ_16K) {
142 test_err(
143"case1 [%llu %llu]: ret %d return a wrong em (start %llu len %llu disk_bytenr %llu disk_num_bytes %llu",
144 start, start + len, ret, em->start, em->len,
145 em->disk_bytenr, em->disk_num_bytes);
146 ret = -EINVAL;
147 }
148 free_extent_map(em);
149out:
150 ret2 = free_extent_map_tree(inode);
151 if (ret == 0)
152 ret = ret2;
153
154 return ret;
155}
156
157/*
158 * Test scenario:
159 *
160 * Reading the inline ending up with EEXIST, ie. read an inline
161 * extent and discard page cache and read it again.
162 */
163static int test_case_2(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
164{
165 struct extent_map_tree *em_tree = &inode->extent_tree;
166 struct extent_map *em;
167 int ret;
168 int ret2;
169
170 em = alloc_extent_map();
171 if (!em) {
172 test_std_err(TEST_ALLOC_EXTENT_MAP);
173 return -ENOMEM;
174 }
175
176 /* Add [0, 1K) */
177 em->start = 0;
178 em->len = SZ_1K;
179 em->disk_bytenr = EXTENT_MAP_INLINE;
180 em->disk_num_bytes = 0;
181 em->ram_bytes = SZ_1K;
182 write_lock(&em_tree->lock);
183 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
184 write_unlock(&em_tree->lock);
185 if (ret < 0) {
186 test_err("cannot add extent range [0, 1K)");
187 goto out;
188 }
189 free_extent_map(em);
190
191 /* Add [4K, 8K) following [0, 1K) */
192 em = alloc_extent_map();
193 if (!em) {
194 test_std_err(TEST_ALLOC_EXTENT_MAP);
195 ret = -ENOMEM;
196 goto out;
197 }
198
199 em->start = SZ_4K;
200 em->len = SZ_4K;
201 em->disk_bytenr = SZ_4K;
202 em->disk_num_bytes = SZ_4K;
203 em->ram_bytes = SZ_4K;
204 write_lock(&em_tree->lock);
205 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
206 write_unlock(&em_tree->lock);
207 if (ret < 0) {
208 test_err("cannot add extent range [4K, 8K)");
209 goto out;
210 }
211 free_extent_map(em);
212
213 em = alloc_extent_map();
214 if (!em) {
215 test_std_err(TEST_ALLOC_EXTENT_MAP);
216 ret = -ENOMEM;
217 goto out;
218 }
219
220 /* Add [0, 1K) */
221 em->start = 0;
222 em->len = SZ_1K;
223 em->disk_bytenr = EXTENT_MAP_INLINE;
224 em->disk_num_bytes = 0;
225 em->ram_bytes = SZ_1K;
226 write_lock(&em_tree->lock);
227 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
228 write_unlock(&em_tree->lock);
229 if (ret) {
230 test_err("case2 [0 1K]: ret %d", ret);
231 goto out;
232 }
233 if (!em) {
234 test_err("case2 [0 1K]: no extent map returned");
235 ret = -ENOENT;
236 goto out;
237 }
238 if (em->start != 0 || extent_map_end(em) != SZ_1K ||
239 em->disk_bytenr != EXTENT_MAP_INLINE) {
240 test_err(
241"case2 [0 1K]: ret %d return a wrong em (start %llu len %llu disk_bytenr %llu",
242 ret, em->start, em->len, em->disk_bytenr);
243 ret = -EINVAL;
244 }
245 free_extent_map(em);
246out:
247 ret2 = free_extent_map_tree(inode);
248 if (ret == 0)
249 ret = ret2;
250
251 return ret;
252}
253
254static int __test_case_3(struct btrfs_fs_info *fs_info,
255 struct btrfs_inode *inode, u64 start)
256{
257 struct extent_map_tree *em_tree = &inode->extent_tree;
258 struct extent_map *em;
259 u64 len = SZ_4K;
260 int ret;
261 int ret2;
262
263 em = alloc_extent_map();
264 if (!em) {
265 test_std_err(TEST_ALLOC_EXTENT_MAP);
266 return -ENOMEM;
267 }
268
269 /* Add [4K, 8K) */
270 em->start = SZ_4K;
271 em->len = SZ_4K;
272 em->disk_bytenr = SZ_4K;
273 em->disk_num_bytes = SZ_4K;
274 em->ram_bytes = SZ_4K;
275 write_lock(&em_tree->lock);
276 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
277 write_unlock(&em_tree->lock);
278 if (ret < 0) {
279 test_err("cannot add extent range [4K, 8K)");
280 goto out;
281 }
282 free_extent_map(em);
283
284 em = alloc_extent_map();
285 if (!em) {
286 test_std_err(TEST_ALLOC_EXTENT_MAP);
287 ret = -ENOMEM;
288 goto out;
289 }
290
291 /* Add [0, 16K) */
292 em->start = 0;
293 em->len = SZ_16K;
294 em->disk_bytenr = 0;
295 em->disk_num_bytes = SZ_16K;
296 em->ram_bytes = SZ_16K;
297 write_lock(&em_tree->lock);
298 ret = btrfs_add_extent_mapping(inode, &em, start, len);
299 write_unlock(&em_tree->lock);
300 if (ret) {
301 test_err("case3 [%llu %llu): ret %d",
302 start, start + len, ret);
303 goto out;
304 }
305 if (!em) {
306 test_err("case3 [%llu %llu): no extent map returned",
307 start, start + len);
308 ret = -ENOENT;
309 goto out;
310 }
311 /*
312 * Since bytes within em are contiguous, em->block_start is identical to
313 * em->start.
314 */
315 if (start < em->start || start + len > extent_map_end(em) ||
316 em->start != extent_map_block_start(em)) {
317 test_err(
318"case3 [%llu %llu): ret %d em (start %llu len %llu disk_bytenr %llu block_len %llu)",
319 start, start + len, ret, em->start, em->len,
320 em->disk_bytenr, em->disk_num_bytes);
321 ret = -EINVAL;
322 }
323 free_extent_map(em);
324out:
325 ret2 = free_extent_map_tree(inode);
326 if (ret == 0)
327 ret = ret2;
328
329 return ret;
330}
331
332/*
333 * Test scenario:
334 *
335 * Suppose that no extent map has been loaded into memory yet.
336 * There is a file extent [0, 16K), two jobs are running concurrently
337 * against it, t1 is buffered writing to [4K, 8K) and t2 is doing dio
338 * read from [0, 4K) or [8K, 12K) or [12K, 16K).
339 *
340 * t1 goes ahead of t2 and adds em [4K, 8K) into tree.
341 *
342 * t1 t2
343 * cow_file_range() btrfs_get_extent()
344 * -> lookup_extent_mapping()
345 * -> add_extent_mapping()
346 * -> add_extent_mapping()
347 */
348static int test_case_3(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
349{
350 int ret;
351
352 ret = __test_case_3(fs_info, inode, 0);
353 if (ret)
354 return ret;
355 ret = __test_case_3(fs_info, inode, SZ_8K);
356 if (ret)
357 return ret;
358 ret = __test_case_3(fs_info, inode, (12 * SZ_1K));
359
360 return ret;
361}
362
363static int __test_case_4(struct btrfs_fs_info *fs_info,
364 struct btrfs_inode *inode, u64 start)
365{
366 struct extent_map_tree *em_tree = &inode->extent_tree;
367 struct extent_map *em;
368 u64 len = SZ_4K;
369 int ret;
370 int ret2;
371
372 em = alloc_extent_map();
373 if (!em) {
374 test_std_err(TEST_ALLOC_EXTENT_MAP);
375 return -ENOMEM;
376 }
377
378 /* Add [0K, 8K) */
379 em->start = 0;
380 em->len = SZ_8K;
381 em->disk_bytenr = 0;
382 em->disk_num_bytes = SZ_8K;
383 em->ram_bytes = SZ_8K;
384 write_lock(&em_tree->lock);
385 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
386 write_unlock(&em_tree->lock);
387 if (ret < 0) {
388 test_err("cannot add extent range [0, 8K)");
389 goto out;
390 }
391 free_extent_map(em);
392
393 em = alloc_extent_map();
394 if (!em) {
395 test_std_err(TEST_ALLOC_EXTENT_MAP);
396 ret = -ENOMEM;
397 goto out;
398 }
399
400 /* Add [8K, 32K) */
401 em->start = SZ_8K;
402 em->len = 24 * SZ_1K;
403 em->disk_bytenr = SZ_16K; /* avoid merging */
404 em->disk_num_bytes = 24 * SZ_1K;
405 em->ram_bytes = 24 * SZ_1K;
406 write_lock(&em_tree->lock);
407 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
408 write_unlock(&em_tree->lock);
409 if (ret < 0) {
410 test_err("cannot add extent range [8K, 32K)");
411 goto out;
412 }
413 free_extent_map(em);
414
415 em = alloc_extent_map();
416 if (!em) {
417 test_std_err(TEST_ALLOC_EXTENT_MAP);
418 ret = -ENOMEM;
419 goto out;
420 }
421 /* Add [0K, 32K) */
422 em->start = 0;
423 em->len = SZ_32K;
424 em->disk_bytenr = 0;
425 em->disk_num_bytes = SZ_32K;
426 em->ram_bytes = SZ_32K;
427 write_lock(&em_tree->lock);
428 ret = btrfs_add_extent_mapping(inode, &em, start, len);
429 write_unlock(&em_tree->lock);
430 if (ret) {
431 test_err("case4 [%llu %llu): ret %d",
432 start, start + len, ret);
433 goto out;
434 }
435 if (!em) {
436 test_err("case4 [%llu %llu): no extent map returned",
437 start, start + len);
438 ret = -ENOENT;
439 goto out;
440 }
441 if (start < em->start || start + len > extent_map_end(em)) {
442 test_err(
443"case4 [%llu %llu): ret %d, added wrong em (start %llu len %llu disk_bytenr %llu disk_num_bytes %llu)",
444 start, start + len, ret, em->start, em->len,
445 em->disk_bytenr, em->disk_num_bytes);
446 ret = -EINVAL;
447 }
448 free_extent_map(em);
449out:
450 ret2 = free_extent_map_tree(inode);
451 if (ret == 0)
452 ret = ret2;
453
454 return ret;
455}
456
457/*
458 * Test scenario:
459 *
460 * Suppose that no extent map has been loaded into memory yet.
461 * There is a file extent [0, 32K), two jobs are running concurrently
462 * against it, t1 is doing dio write to [8K, 32K) and t2 is doing dio
463 * read from [0, 4K) or [4K, 8K).
464 *
465 * t1 goes ahead of t2 and splits em [0, 32K) to em [0K, 8K) and [8K 32K).
466 *
467 * t1 t2
468 * btrfs_get_blocks_direct() btrfs_get_blocks_direct()
469 * -> btrfs_get_extent() -> btrfs_get_extent()
470 * -> lookup_extent_mapping()
471 * -> add_extent_mapping() -> lookup_extent_mapping()
472 * # load [0, 32K)
473 * -> btrfs_new_extent_direct()
474 * -> btrfs_drop_extent_cache()
475 * # split [0, 32K)
476 * -> add_extent_mapping()
477 * # add [8K, 32K)
478 * -> add_extent_mapping()
479 * # handle -EEXIST when adding
480 * # [0, 32K)
481 */
482static int test_case_4(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
483{
484 int ret;
485
486 ret = __test_case_4(fs_info, inode, 0);
487 if (ret)
488 return ret;
489 ret = __test_case_4(fs_info, inode, SZ_4K);
490
491 return ret;
492}
493
494static int add_compressed_extent(struct btrfs_inode *inode,
495 u64 start, u64 len, u64 block_start)
496{
497 struct extent_map_tree *em_tree = &inode->extent_tree;
498 struct extent_map *em;
499 int ret;
500
501 em = alloc_extent_map();
502 if (!em) {
503 test_std_err(TEST_ALLOC_EXTENT_MAP);
504 return -ENOMEM;
505 }
506
507 em->start = start;
508 em->len = len;
509 em->disk_bytenr = block_start;
510 em->disk_num_bytes = SZ_4K;
511 em->ram_bytes = len;
512 em->flags |= EXTENT_FLAG_COMPRESS_ZLIB;
513 write_lock(&em_tree->lock);
514 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
515 write_unlock(&em_tree->lock);
516 free_extent_map(em);
517 if (ret < 0) {
518 test_err("cannot add extent map [%llu, %llu)", start, start + len);
519 return ret;
520 }
521
522 return 0;
523}
524
525struct extent_range {
526 u64 start;
527 u64 len;
528};
529
530/* The valid states of the tree after every drop, as described below. */
531struct extent_range valid_ranges[][7] = {
532 {
533 { .start = 0, .len = SZ_8K }, /* [0, 8K) */
534 { .start = SZ_4K * 3, .len = SZ_4K * 3}, /* [12k, 24k) */
535 { .start = SZ_4K * 6, .len = SZ_4K * 3}, /* [24k, 36k) */
536 { .start = SZ_32K + SZ_4K, .len = SZ_4K}, /* [36k, 40k) */
537 { .start = SZ_4K * 10, .len = SZ_4K * 6}, /* [40k, 64k) */
538 },
539 {
540 { .start = 0, .len = SZ_8K }, /* [0, 8K) */
541 { .start = SZ_4K * 5, .len = SZ_4K}, /* [20k, 24k) */
542 { .start = SZ_4K * 6, .len = SZ_4K * 3}, /* [24k, 36k) */
543 { .start = SZ_32K + SZ_4K, .len = SZ_4K}, /* [36k, 40k) */
544 { .start = SZ_4K * 10, .len = SZ_4K * 6}, /* [40k, 64k) */
545 },
546 {
547 { .start = 0, .len = SZ_8K }, /* [0, 8K) */
548 { .start = SZ_4K * 5, .len = SZ_4K}, /* [20k, 24k) */
549 { .start = SZ_4K * 6, .len = SZ_4K}, /* [24k, 28k) */
550 { .start = SZ_32K, .len = SZ_4K}, /* [32k, 36k) */
551 { .start = SZ_32K + SZ_4K, .len = SZ_4K}, /* [36k, 40k) */
552 { .start = SZ_4K * 10, .len = SZ_4K * 6}, /* [40k, 64k) */
553 },
554 {
555 { .start = 0, .len = SZ_8K}, /* [0, 8K) */
556 { .start = SZ_4K * 5, .len = SZ_4K}, /* [20k, 24k) */
557 { .start = SZ_4K * 6, .len = SZ_4K}, /* [24k, 28k) */
558 }
559};
560
561static int validate_range(struct extent_map_tree *em_tree, int index)
562{
563 struct rb_node *n;
564 int i;
565
566 for (i = 0, n = rb_first(&em_tree->root);
567 valid_ranges[index][i].len && n;
568 i++, n = rb_next(n)) {
569 struct extent_map *entry = rb_entry(n, struct extent_map, rb_node);
570
571 if (entry->start != valid_ranges[index][i].start) {
572 test_err("mapping has start %llu expected %llu",
573 entry->start, valid_ranges[index][i].start);
574 return -EINVAL;
575 }
576
577 if (entry->len != valid_ranges[index][i].len) {
578 test_err("mapping has len %llu expected %llu",
579 entry->len, valid_ranges[index][i].len);
580 return -EINVAL;
581 }
582 }
583
584 /*
585 * We exited because we don't have any more entries in the extent_map
586 * but we still expect more valid entries.
587 */
588 if (valid_ranges[index][i].len) {
589 test_err("missing an entry");
590 return -EINVAL;
591 }
592
593 /* We exited the loop but still have entries in the extent map. */
594 if (n) {
595 test_err("we have a left over entry in the extent map we didn't expect");
596 return -EINVAL;
597 }
598
599 return 0;
600}
601
602/*
603 * Test scenario:
604 *
605 * Test the various edge cases of btrfs_drop_extent_map_range, create the
606 * following ranges
607 *
608 * [0, 12k)[12k, 24k)[24k, 36k)[36k, 40k)[40k,64k)
609 *
610 * And then we'll drop:
611 *
612 * [8k, 12k) - test the single front split
613 * [12k, 20k) - test the single back split
614 * [28k, 32k) - test the double split
615 * [32k, 64k) - test whole em dropping
616 *
617 * They'll have the EXTENT_FLAG_COMPRESSED flag set to keep the em tree from
618 * merging the em's.
619 */
620static int test_case_5(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
621{
622 u64 start, end;
623 int ret;
624 int ret2;
625
626 test_msg("Running btrfs_drop_extent_map_range tests");
627
628 /* [0, 12k) */
629 ret = add_compressed_extent(inode, 0, SZ_4K * 3, 0);
630 if (ret) {
631 test_err("cannot add extent range [0, 12K)");
632 goto out;
633 }
634
635 /* [12k, 24k) */
636 ret = add_compressed_extent(inode, SZ_4K * 3, SZ_4K * 3, SZ_4K);
637 if (ret) {
638 test_err("cannot add extent range [12k, 24k)");
639 goto out;
640 }
641
642 /* [24k, 36k) */
643 ret = add_compressed_extent(inode, SZ_4K * 6, SZ_4K * 3, SZ_8K);
644 if (ret) {
645 test_err("cannot add extent range [12k, 24k)");
646 goto out;
647 }
648
649 /* [36k, 40k) */
650 ret = add_compressed_extent(inode, SZ_32K + SZ_4K, SZ_4K, SZ_4K * 3);
651 if (ret) {
652 test_err("cannot add extent range [12k, 24k)");
653 goto out;
654 }
655
656 /* [40k, 64k) */
657 ret = add_compressed_extent(inode, SZ_4K * 10, SZ_4K * 6, SZ_16K);
658 if (ret) {
659 test_err("cannot add extent range [12k, 24k)");
660 goto out;
661 }
662
663 /* Drop [8k, 12k) */
664 start = SZ_8K;
665 end = (3 * SZ_4K) - 1;
666 btrfs_drop_extent_map_range(inode, start, end, false);
667 ret = validate_range(&inode->extent_tree, 0);
668 if (ret)
669 goto out;
670
671 /* Drop [12k, 20k) */
672 start = SZ_4K * 3;
673 end = SZ_16K + SZ_4K - 1;
674 btrfs_drop_extent_map_range(inode, start, end, false);
675 ret = validate_range(&inode->extent_tree, 1);
676 if (ret)
677 goto out;
678
679 /* Drop [28k, 32k) */
680 start = SZ_32K - SZ_4K;
681 end = SZ_32K - 1;
682 btrfs_drop_extent_map_range(inode, start, end, false);
683 ret = validate_range(&inode->extent_tree, 2);
684 if (ret)
685 goto out;
686
687 /* Drop [32k, 64k) */
688 start = SZ_32K;
689 end = SZ_64K - 1;
690 btrfs_drop_extent_map_range(inode, start, end, false);
691 ret = validate_range(&inode->extent_tree, 3);
692 if (ret)
693 goto out;
694out:
695 ret2 = free_extent_map_tree(inode);
696 if (ret == 0)
697 ret = ret2;
698
699 return ret;
700}
701
702/*
703 * Test the btrfs_add_extent_mapping helper which will attempt to create an em
704 * for areas between two existing ems. Validate it doesn't do this when there
705 * are two unmerged em's side by side.
706 */
707static int test_case_6(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
708{
709 struct extent_map_tree *em_tree = &inode->extent_tree;
710 struct extent_map *em = NULL;
711 int ret;
712 int ret2;
713
714 ret = add_compressed_extent(inode, 0, SZ_4K, 0);
715 if (ret)
716 goto out;
717
718 ret = add_compressed_extent(inode, SZ_4K, SZ_4K, 0);
719 if (ret)
720 goto out;
721
722 em = alloc_extent_map();
723 if (!em) {
724 test_std_err(TEST_ALLOC_EXTENT_MAP);
725 ret = -ENOMEM;
726 goto out;
727 }
728
729 em->start = SZ_4K;
730 em->len = SZ_4K;
731 em->disk_bytenr = SZ_16K;
732 em->disk_num_bytes = SZ_16K;
733 em->ram_bytes = SZ_16K;
734 write_lock(&em_tree->lock);
735 ret = btrfs_add_extent_mapping(inode, &em, 0, SZ_8K);
736 write_unlock(&em_tree->lock);
737
738 if (ret != 0) {
739 test_err("got an error when adding our em: %d", ret);
740 goto out;
741 }
742
743 ret = -EINVAL;
744 if (em->start != 0) {
745 test_err("unexpected em->start at %llu, wanted 0", em->start);
746 goto out;
747 }
748 if (em->len != SZ_4K) {
749 test_err("unexpected em->len %llu, expected 4K", em->len);
750 goto out;
751 }
752 ret = 0;
753out:
754 free_extent_map(em);
755 ret2 = free_extent_map_tree(inode);
756 if (ret == 0)
757 ret = ret2;
758
759 return ret;
760}
761
762/*
763 * Regression test for btrfs_drop_extent_map_range. Calling with skip_pinned ==
764 * true would mess up the start/end calculations and subsequent splits would be
765 * incorrect.
766 */
767static int test_case_7(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
768{
769 struct extent_map_tree *em_tree = &inode->extent_tree;
770 struct extent_map *em;
771 int ret;
772 int ret2;
773
774 test_msg("Running btrfs_drop_extent_cache with pinned");
775
776 em = alloc_extent_map();
777 if (!em) {
778 test_std_err(TEST_ALLOC_EXTENT_MAP);
779 return -ENOMEM;
780 }
781
782 /* [0, 16K), pinned */
783 em->start = 0;
784 em->len = SZ_16K;
785 em->disk_bytenr = 0;
786 em->disk_num_bytes = SZ_4K;
787 em->ram_bytes = SZ_16K;
788 em->flags |= (EXTENT_FLAG_PINNED | EXTENT_FLAG_COMPRESS_ZLIB);
789 write_lock(&em_tree->lock);
790 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
791 write_unlock(&em_tree->lock);
792 if (ret < 0) {
793 test_err("couldn't add extent map");
794 goto out;
795 }
796 free_extent_map(em);
797
798 em = alloc_extent_map();
799 if (!em) {
800 test_std_err(TEST_ALLOC_EXTENT_MAP);
801 ret = -ENOMEM;
802 goto out;
803 }
804
805 /* [32K, 48K), not pinned */
806 em->start = SZ_32K;
807 em->len = SZ_16K;
808 em->disk_bytenr = SZ_32K;
809 em->disk_num_bytes = SZ_16K;
810 em->ram_bytes = SZ_16K;
811 write_lock(&em_tree->lock);
812 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
813 write_unlock(&em_tree->lock);
814 if (ret < 0) {
815 test_err("couldn't add extent map");
816 goto out;
817 }
818 free_extent_map(em);
819
820 /*
821 * Drop [0, 36K) This should skip the [0, 4K) extent and then split the
822 * [32K, 48K) extent.
823 */
824 btrfs_drop_extent_map_range(inode, 0, (36 * SZ_1K) - 1, true);
825
826 /* Make sure our extent maps look sane. */
827 ret = -EINVAL;
828
829 em = lookup_extent_mapping(em_tree, 0, SZ_16K);
830 if (!em) {
831 test_err("didn't find an em at 0 as expected");
832 goto out;
833 }
834
835 if (em->start != 0) {
836 test_err("em->start is %llu, expected 0", em->start);
837 goto out;
838 }
839
840 if (em->len != SZ_16K) {
841 test_err("em->len is %llu, expected 16K", em->len);
842 goto out;
843 }
844
845 free_extent_map(em);
846
847 read_lock(&em_tree->lock);
848 em = lookup_extent_mapping(em_tree, SZ_16K, SZ_16K);
849 read_unlock(&em_tree->lock);
850 if (em) {
851 test_err("found an em when we weren't expecting one");
852 goto out;
853 }
854
855 read_lock(&em_tree->lock);
856 em = lookup_extent_mapping(em_tree, SZ_32K, SZ_16K);
857 read_unlock(&em_tree->lock);
858 if (!em) {
859 test_err("didn't find an em at 32K as expected");
860 goto out;
861 }
862
863 if (em->start != (36 * SZ_1K)) {
864 test_err("em->start is %llu, expected 36K", em->start);
865 goto out;
866 }
867
868 if (em->len != (12 * SZ_1K)) {
869 test_err("em->len is %llu, expected 12K", em->len);
870 goto out;
871 }
872
873 if (extent_map_block_start(em) != SZ_32K + SZ_4K) {
874 test_err("em->block_start is %llu, expected 36K",
875 extent_map_block_start(em));
876 goto out;
877 }
878
879 free_extent_map(em);
880
881 read_lock(&em_tree->lock);
882 em = lookup_extent_mapping(em_tree, 48 * SZ_1K, (u64)-1);
883 read_unlock(&em_tree->lock);
884 if (em) {
885 test_err("found an unexpected em above 48K");
886 goto out;
887 }
888
889 ret = 0;
890out:
891 free_extent_map(em);
892 /* Unpin our extent to prevent warning when removing it below. */
893 ret2 = unpin_extent_cache(inode, 0, SZ_16K, 0);
894 if (ret == 0)
895 ret = ret2;
896 ret2 = free_extent_map_tree(inode);
897 if (ret == 0)
898 ret = ret2;
899
900 return ret;
901}
902
903/*
904 * Test a regression for compressed extent map adjustment when we attempt to
905 * add an extent map that is partially overlapped by another existing extent
906 * map. The resulting extent map offset was left unchanged despite having
907 * incremented its start offset.
908 */
909static int test_case_8(struct btrfs_fs_info *fs_info, struct btrfs_inode *inode)
910{
911 struct extent_map_tree *em_tree = &inode->extent_tree;
912 struct extent_map *em;
913 int ret;
914 int ret2;
915
916 em = alloc_extent_map();
917 if (!em) {
918 test_std_err(TEST_ALLOC_EXTENT_MAP);
919 return -ENOMEM;
920 }
921
922 /* Compressed extent for the file range [120K, 128K). */
923 em->start = SZ_1K * 120;
924 em->len = SZ_8K;
925 em->disk_num_bytes = SZ_4K;
926 em->ram_bytes = SZ_8K;
927 em->flags |= EXTENT_FLAG_COMPRESS_ZLIB;
928 write_lock(&em_tree->lock);
929 ret = btrfs_add_extent_mapping(inode, &em, em->start, em->len);
930 write_unlock(&em_tree->lock);
931 free_extent_map(em);
932 if (ret < 0) {
933 test_err("couldn't add extent map for range [120K, 128K)");
934 goto out;
935 }
936
937 em = alloc_extent_map();
938 if (!em) {
939 test_std_err(TEST_ALLOC_EXTENT_MAP);
940 ret = -ENOMEM;
941 goto out;
942 }
943
944 /*
945 * Compressed extent for the file range [108K, 144K), which overlaps
946 * with the [120K, 128K) we previously inserted.
947 */
948 em->start = SZ_1K * 108;
949 em->len = SZ_1K * 36;
950 em->disk_num_bytes = SZ_4K;
951 em->ram_bytes = SZ_1K * 36;
952 em->flags |= EXTENT_FLAG_COMPRESS_ZLIB;
953
954 /*
955 * Try to add the extent map but with a search range of [140K, 144K),
956 * this should succeed and adjust the extent map to the range
957 * [128K, 144K), with a length of 16K and an offset of 20K.
958 *
959 * This simulates a scenario where in the subvolume tree of an inode we
960 * have a compressed file extent item for the range [108K, 144K) and we
961 * have an overlapping compressed extent map for the range [120K, 128K),
962 * which was created by an encoded write, but its ordered extent was not
963 * yet completed, so the subvolume tree doesn't have yet the file extent
964 * item for that range - we only have the extent map in the inode's
965 * extent map tree.
966 */
967 write_lock(&em_tree->lock);
968 ret = btrfs_add_extent_mapping(inode, &em, SZ_1K * 140, SZ_4K);
969 write_unlock(&em_tree->lock);
970 free_extent_map(em);
971 if (ret < 0) {
972 test_err("couldn't add extent map for range [108K, 144K)");
973 goto out;
974 }
975
976 if (em->start != SZ_128K) {
977 test_err("unexpected extent map start %llu (should be 128K)", em->start);
978 ret = -EINVAL;
979 goto out;
980 }
981 if (em->len != SZ_16K) {
982 test_err("unexpected extent map length %llu (should be 16K)", em->len);
983 ret = -EINVAL;
984 goto out;
985 }
986 if (em->offset != SZ_1K * 20) {
987 test_err("unexpected extent map offset %llu (should be 20K)", em->offset);
988 ret = -EINVAL;
989 goto out;
990 }
991out:
992 ret2 = free_extent_map_tree(inode);
993 if (ret == 0)
994 ret = ret2;
995
996 return ret;
997}
998
999struct rmap_test_vector {
1000 u64 raid_type;
1001 u64 physical_start;
1002 u64 data_stripe_size;
1003 u64 num_data_stripes;
1004 u64 num_stripes;
1005 /* Assume we won't have more than 5 physical stripes */
1006 u64 data_stripe_phys_start[5];
1007 bool expected_mapped_addr;
1008 /* Physical to logical addresses */
1009 u64 mapped_logical[5];
1010};
1011
1012static int test_rmap_block(struct btrfs_fs_info *fs_info,
1013 struct rmap_test_vector *test)
1014{
1015 struct btrfs_chunk_map *map;
1016 u64 *logical = NULL;
1017 int i, out_ndaddrs, out_stripe_len;
1018 int ret;
1019
1020 map = btrfs_alloc_chunk_map(test->num_stripes, GFP_KERNEL);
1021 if (!map) {
1022 test_std_err(TEST_ALLOC_CHUNK_MAP);
1023 return -ENOMEM;
1024 }
1025
1026 /* Start at 4GiB logical address */
1027 map->start = SZ_4G;
1028 map->chunk_len = test->data_stripe_size * test->num_data_stripes;
1029 map->stripe_size = test->data_stripe_size;
1030 map->num_stripes = test->num_stripes;
1031 map->type = test->raid_type;
1032
1033 for (i = 0; i < map->num_stripes; i++) {
1034 struct btrfs_device *dev = btrfs_alloc_dummy_device(fs_info);
1035
1036 if (IS_ERR(dev)) {
1037 test_err("cannot allocate device");
1038 ret = PTR_ERR(dev);
1039 goto out;
1040 }
1041 map->stripes[i].dev = dev;
1042 map->stripes[i].physical = test->data_stripe_phys_start[i];
1043 }
1044
1045 ret = btrfs_add_chunk_map(fs_info, map);
1046 if (ret) {
1047 test_err("error adding chunk map to mapping tree");
1048 goto out_free;
1049 }
1050
1051 ret = btrfs_rmap_block(fs_info, map->start, btrfs_sb_offset(1),
1052 &logical, &out_ndaddrs, &out_stripe_len);
1053 if (ret || (out_ndaddrs == 0 && test->expected_mapped_addr)) {
1054 test_err("didn't rmap anything but expected %d",
1055 test->expected_mapped_addr);
1056 goto out;
1057 }
1058
1059 if (out_stripe_len != BTRFS_STRIPE_LEN) {
1060 test_err("calculated stripe length doesn't match");
1061 goto out;
1062 }
1063
1064 if (out_ndaddrs != test->expected_mapped_addr) {
1065 for (i = 0; i < out_ndaddrs; i++)
1066 test_msg("mapped %llu", logical[i]);
1067 test_err("unexpected number of mapped addresses: %d", out_ndaddrs);
1068 goto out;
1069 }
1070
1071 for (i = 0; i < out_ndaddrs; i++) {
1072 if (logical[i] != test->mapped_logical[i]) {
1073 test_err("unexpected logical address mapped");
1074 goto out;
1075 }
1076 }
1077
1078 ret = 0;
1079out:
1080 btrfs_remove_chunk_map(fs_info, map);
1081out_free:
1082 kfree(logical);
1083 return ret;
1084}
1085
1086int btrfs_test_extent_map(void)
1087{
1088 struct btrfs_fs_info *fs_info = NULL;
1089 struct inode *inode;
1090 struct btrfs_root *root = NULL;
1091 int ret = 0, i;
1092 struct rmap_test_vector rmap_tests[] = {
1093 {
1094 /*
1095 * Test a chunk with 2 data stripes one of which
1096 * intersects the physical address of the super block
1097 * is correctly recognised.
1098 */
1099 .raid_type = BTRFS_BLOCK_GROUP_RAID1,
1100 .physical_start = SZ_64M - SZ_4M,
1101 .data_stripe_size = SZ_256M,
1102 .num_data_stripes = 2,
1103 .num_stripes = 2,
1104 .data_stripe_phys_start =
1105 {SZ_64M - SZ_4M, SZ_64M - SZ_4M + SZ_256M},
1106 .expected_mapped_addr = true,
1107 .mapped_logical= {SZ_4G + SZ_4M}
1108 },
1109 {
1110 /*
1111 * Test that out-of-range physical addresses are
1112 * ignored
1113 */
1114
1115 /* SINGLE chunk type */
1116 .raid_type = 0,
1117 .physical_start = SZ_4G,
1118 .data_stripe_size = SZ_256M,
1119 .num_data_stripes = 1,
1120 .num_stripes = 1,
1121 .data_stripe_phys_start = {SZ_256M},
1122 .expected_mapped_addr = false,
1123 .mapped_logical = {0}
1124 }
1125 };
1126
1127 test_msg("running extent_map tests");
1128
1129 /*
1130 * Note: the fs_info is not set up completely, we only need
1131 * fs_info::fsid for the tracepoint.
1132 */
1133 fs_info = btrfs_alloc_dummy_fs_info(PAGE_SIZE, PAGE_SIZE);
1134 if (!fs_info) {
1135 test_std_err(TEST_ALLOC_FS_INFO);
1136 return -ENOMEM;
1137 }
1138
1139 inode = btrfs_new_test_inode();
1140 if (!inode) {
1141 test_std_err(TEST_ALLOC_INODE);
1142 ret = -ENOMEM;
1143 goto out;
1144 }
1145
1146 root = btrfs_alloc_dummy_root(fs_info);
1147 if (IS_ERR(root)) {
1148 test_std_err(TEST_ALLOC_ROOT);
1149 ret = PTR_ERR(root);
1150 root = NULL;
1151 goto out;
1152 }
1153
1154 BTRFS_I(inode)->root = root;
1155
1156 ret = test_case_1(fs_info, BTRFS_I(inode));
1157 if (ret)
1158 goto out;
1159 ret = test_case_2(fs_info, BTRFS_I(inode));
1160 if (ret)
1161 goto out;
1162 ret = test_case_3(fs_info, BTRFS_I(inode));
1163 if (ret)
1164 goto out;
1165 ret = test_case_4(fs_info, BTRFS_I(inode));
1166 if (ret)
1167 goto out;
1168 ret = test_case_5(fs_info, BTRFS_I(inode));
1169 if (ret)
1170 goto out;
1171 ret = test_case_6(fs_info, BTRFS_I(inode));
1172 if (ret)
1173 goto out;
1174 ret = test_case_7(fs_info, BTRFS_I(inode));
1175 if (ret)
1176 goto out;
1177 ret = test_case_8(fs_info, BTRFS_I(inode));
1178 if (ret)
1179 goto out;
1180
1181 test_msg("running rmap tests");
1182 for (i = 0; i < ARRAY_SIZE(rmap_tests); i++) {
1183 ret = test_rmap_block(fs_info, &rmap_tests[i]);
1184 if (ret)
1185 goto out;
1186 }
1187
1188out:
1189 iput(inode);
1190 btrfs_free_dummy_root(root);
1191 btrfs_free_dummy_fs_info(fs_info);
1192
1193 return ret;
1194}