1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2013 Fusion IO. 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 "../disk-io.h"
11 #include "../extent_io.h"
12 #include "../volumes.h"
13 #include "../compression.h"
14
insert_extent(struct btrfs_root * root,u64 start,u64 len,u64 ram_bytes,u64 offset,u64 disk_bytenr,u64 disk_len,u32 type,u8 compression,int slot)15 static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
16 u64 ram_bytes, u64 offset, u64 disk_bytenr,
17 u64 disk_len, u32 type, u8 compression, int slot)
18 {
19 struct btrfs_path path;
20 struct btrfs_file_extent_item *fi;
21 struct extent_buffer *leaf = root->node;
22 struct btrfs_key key;
23 u32 value_len = sizeof(struct btrfs_file_extent_item);
24
25 if (type == BTRFS_FILE_EXTENT_INLINE)
26 value_len += len;
27 memset(&path, 0, sizeof(path));
28
29 path.nodes[0] = leaf;
30 path.slots[0] = slot;
31
32 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
33 key.type = BTRFS_EXTENT_DATA_KEY;
34 key.offset = start;
35
36 btrfs_setup_item_for_insert(root, &path, &key, value_len);
37 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
38 btrfs_set_file_extent_generation(leaf, fi, 1);
39 btrfs_set_file_extent_type(leaf, fi, type);
40 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
41 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
42 btrfs_set_file_extent_offset(leaf, fi, offset);
43 btrfs_set_file_extent_num_bytes(leaf, fi, len);
44 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
45 btrfs_set_file_extent_compression(leaf, fi, compression);
46 btrfs_set_file_extent_encryption(leaf, fi, 0);
47 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
48 }
49
insert_inode_item_key(struct btrfs_root * root)50 static void insert_inode_item_key(struct btrfs_root *root)
51 {
52 struct btrfs_path path;
53 struct extent_buffer *leaf = root->node;
54 struct btrfs_key key;
55 u32 value_len = 0;
56
57 memset(&path, 0, sizeof(path));
58
59 path.nodes[0] = leaf;
60 path.slots[0] = 0;
61
62 key.objectid = BTRFS_INODE_ITEM_KEY;
63 key.type = BTRFS_INODE_ITEM_KEY;
64 key.offset = 0;
65
66 btrfs_setup_item_for_insert(root, &path, &key, value_len);
67 }
68
69 /*
70 * Build the most complicated map of extents the earth has ever seen. We want
71 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
72 * diagram of how the extents will look though this may not be possible we still
73 * want to make sure everything acts normally (the last number is not inclusive)
74 *
75 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
76 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
77 *
78 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
79 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
80 *
81 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
82 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
83 *
84 * [69635-73731][ 73731 - 86019 ][86019-90115]
85 * [ regular ][ hole but no extent][ regular ]
86 */
setup_file_extents(struct btrfs_root * root,u32 sectorsize)87 static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
88 {
89 int slot = 0;
90 u64 disk_bytenr = SZ_1M;
91 u64 offset = 0;
92
93 /* First we want a hole */
94 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
95 slot);
96 slot++;
97 offset += 5;
98
99 /*
100 * Now we want an inline extent, I don't think this is possible but hey
101 * why not? Also keep in mind if we have an inline extent it counts as
102 * the whole first page. If we were to expand it we would have to cow
103 * and we wouldn't have an inline extent anymore.
104 */
105 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
106 slot);
107 slot++;
108 offset = sectorsize;
109
110 /* Now another hole */
111 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
112 slot);
113 slot++;
114 offset += 4;
115
116 /* Now for a regular extent */
117 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
118 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
119 slot++;
120 disk_bytenr += sectorsize;
121 offset += sectorsize - 1;
122
123 /*
124 * Now for 3 extents that were split from a hole punch so we test
125 * offsets properly.
126 */
127 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
128 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
129 slot++;
130 offset += sectorsize;
131 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
132 BTRFS_FILE_EXTENT_REG, 0, slot);
133 slot++;
134 offset += sectorsize;
135 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
136 2 * sectorsize, disk_bytenr, 4 * sectorsize,
137 BTRFS_FILE_EXTENT_REG, 0, slot);
138 slot++;
139 offset += 2 * sectorsize;
140 disk_bytenr += 4 * sectorsize;
141
142 /* Now for a unwritten prealloc extent */
143 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
144 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
145 slot++;
146 offset += sectorsize;
147
148 /*
149 * We want to jack up disk_bytenr a little more so the em stuff doesn't
150 * merge our records.
151 */
152 disk_bytenr += 2 * sectorsize;
153
154 /*
155 * Now for a partially written prealloc extent, basically the same as
156 * the hole punch example above. Ram_bytes never changes when you mark
157 * extents written btw.
158 */
159 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
160 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
161 slot++;
162 offset += sectorsize;
163 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
164 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
165 slot);
166 slot++;
167 offset += sectorsize;
168 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
169 2 * sectorsize, disk_bytenr, 4 * sectorsize,
170 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
171 slot++;
172 offset += 2 * sectorsize;
173 disk_bytenr += 4 * sectorsize;
174
175 /* Now a normal compressed extent */
176 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
177 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
178 BTRFS_COMPRESS_ZLIB, slot);
179 slot++;
180 offset += 2 * sectorsize;
181 /* No merges */
182 disk_bytenr += 2 * sectorsize;
183
184 /* Now a split compressed extent */
185 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
186 sectorsize, BTRFS_FILE_EXTENT_REG,
187 BTRFS_COMPRESS_ZLIB, slot);
188 slot++;
189 offset += sectorsize;
190 insert_extent(root, offset, sectorsize, sectorsize, 0,
191 disk_bytenr + sectorsize, sectorsize,
192 BTRFS_FILE_EXTENT_REG, 0, slot);
193 slot++;
194 offset += sectorsize;
195 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
196 2 * sectorsize, disk_bytenr, sectorsize,
197 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
198 slot++;
199 offset += 2 * sectorsize;
200 disk_bytenr += 2 * sectorsize;
201
202 /* Now extents that have a hole but no hole extent */
203 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
204 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
205 slot++;
206 offset += 4 * sectorsize;
207 disk_bytenr += sectorsize;
208 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
209 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
210 }
211
212 static unsigned long prealloc_only = 0;
213 static unsigned long compressed_only = 0;
214 static unsigned long vacancy_only = 0;
215
test_btrfs_get_extent(u32 sectorsize,u32 nodesize)216 static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
217 {
218 struct btrfs_fs_info *fs_info = NULL;
219 struct inode *inode = NULL;
220 struct btrfs_root *root = NULL;
221 struct extent_map *em = NULL;
222 u64 orig_start;
223 u64 disk_bytenr;
224 u64 offset;
225 int ret = -ENOMEM;
226
227 test_msg("running btrfs_get_extent tests");
228
229 inode = btrfs_new_test_inode();
230 if (!inode) {
231 test_std_err(TEST_ALLOC_INODE);
232 return ret;
233 }
234
235 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
236 if (!fs_info) {
237 test_std_err(TEST_ALLOC_FS_INFO);
238 goto out;
239 }
240
241 root = btrfs_alloc_dummy_root(fs_info);
242 if (IS_ERR(root)) {
243 test_std_err(TEST_ALLOC_ROOT);
244 goto out;
245 }
246
247 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
248 if (!root->node) {
249 test_std_err(TEST_ALLOC_ROOT);
250 goto out;
251 }
252
253 btrfs_set_header_nritems(root->node, 0);
254 btrfs_set_header_level(root->node, 0);
255 ret = -EINVAL;
256
257 /* First with no extents */
258 BTRFS_I(inode)->root = root;
259 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize);
260 if (IS_ERR(em)) {
261 em = NULL;
262 test_err("got an error when we shouldn't have");
263 goto out;
264 }
265 if (em->block_start != EXTENT_MAP_HOLE) {
266 test_err("expected a hole, got %llu", em->block_start);
267 goto out;
268 }
269 free_extent_map(em);
270 btrfs_drop_extent_map_range(BTRFS_I(inode), 0, (u64)-1, false);
271
272 /*
273 * All of the magic numbers are based on the mapping setup in
274 * setup_file_extents, so if you change anything there you need to
275 * update the comment and update the expected values below.
276 */
277 setup_file_extents(root, sectorsize);
278
279 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1);
280 if (IS_ERR(em)) {
281 test_err("got an error when we shouldn't have");
282 goto out;
283 }
284 if (em->block_start != EXTENT_MAP_HOLE) {
285 test_err("expected a hole, got %llu", em->block_start);
286 goto out;
287 }
288 if (em->start != 0 || em->len != 5) {
289 test_err(
290 "unexpected extent wanted start 0 len 5, got start %llu len %llu",
291 em->start, em->len);
292 goto out;
293 }
294 if (em->flags != 0) {
295 test_err("unexpected flags set, want 0 have %lu", em->flags);
296 goto out;
297 }
298 offset = em->start + em->len;
299 free_extent_map(em);
300
301 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
302 if (IS_ERR(em)) {
303 test_err("got an error when we shouldn't have");
304 goto out;
305 }
306 if (em->block_start != EXTENT_MAP_INLINE) {
307 test_err("expected an inline, got %llu", em->block_start);
308 goto out;
309 }
310
311 if (em->start != offset || em->len != (sectorsize - 5)) {
312 test_err(
313 "unexpected extent wanted start %llu len 1, got start %llu len %llu",
314 offset, em->start, em->len);
315 goto out;
316 }
317 if (em->flags != 0) {
318 test_err("unexpected flags set, want 0 have %lu", em->flags);
319 goto out;
320 }
321 /*
322 * We don't test anything else for inline since it doesn't get set
323 * unless we have a page for it to write into. Maybe we should change
324 * this?
325 */
326 offset = em->start + em->len;
327 free_extent_map(em);
328
329 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
330 if (IS_ERR(em)) {
331 test_err("got an error when we shouldn't have");
332 goto out;
333 }
334 if (em->block_start != EXTENT_MAP_HOLE) {
335 test_err("expected a hole, got %llu", em->block_start);
336 goto out;
337 }
338 if (em->start != offset || em->len != 4) {
339 test_err(
340 "unexpected extent wanted start %llu len 4, got start %llu len %llu",
341 offset, em->start, em->len);
342 goto out;
343 }
344 if (em->flags != 0) {
345 test_err("unexpected flags set, want 0 have %lu", em->flags);
346 goto out;
347 }
348 offset = em->start + em->len;
349 free_extent_map(em);
350
351 /* Regular extent */
352 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
353 if (IS_ERR(em)) {
354 test_err("got an error when we shouldn't have");
355 goto out;
356 }
357 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
358 test_err("expected a real extent, got %llu", em->block_start);
359 goto out;
360 }
361 if (em->start != offset || em->len != sectorsize - 1) {
362 test_err(
363 "unexpected extent wanted start %llu len 4095, got start %llu len %llu",
364 offset, em->start, em->len);
365 goto out;
366 }
367 if (em->flags != 0) {
368 test_err("unexpected flags set, want 0 have %lu", em->flags);
369 goto out;
370 }
371 if (em->orig_start != em->start) {
372 test_err("wrong orig offset, want %llu, have %llu", em->start,
373 em->orig_start);
374 goto out;
375 }
376 offset = em->start + em->len;
377 free_extent_map(em);
378
379 /* The next 3 are split extents */
380 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
381 if (IS_ERR(em)) {
382 test_err("got an error when we shouldn't have");
383 goto out;
384 }
385 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
386 test_err("expected a real extent, got %llu", em->block_start);
387 goto out;
388 }
389 if (em->start != offset || em->len != sectorsize) {
390 test_err(
391 "unexpected extent start %llu len %u, got start %llu len %llu",
392 offset, sectorsize, em->start, em->len);
393 goto out;
394 }
395 if (em->flags != 0) {
396 test_err("unexpected flags set, want 0 have %lu", em->flags);
397 goto out;
398 }
399 if (em->orig_start != em->start) {
400 test_err("wrong orig offset, want %llu, have %llu", em->start,
401 em->orig_start);
402 goto out;
403 }
404 disk_bytenr = em->block_start;
405 orig_start = em->start;
406 offset = em->start + em->len;
407 free_extent_map(em);
408
409 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
410 if (IS_ERR(em)) {
411 test_err("got an error when we shouldn't have");
412 goto out;
413 }
414 if (em->block_start != EXTENT_MAP_HOLE) {
415 test_err("expected a hole, got %llu", em->block_start);
416 goto out;
417 }
418 if (em->start != offset || em->len != sectorsize) {
419 test_err(
420 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
421 offset, sectorsize, em->start, em->len);
422 goto out;
423 }
424 if (em->flags != 0) {
425 test_err("unexpected flags set, want 0 have %lu", em->flags);
426 goto out;
427 }
428 offset = em->start + em->len;
429 free_extent_map(em);
430
431 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
432 if (IS_ERR(em)) {
433 test_err("got an error when we shouldn't have");
434 goto out;
435 }
436 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
437 test_err("expected a real extent, got %llu", em->block_start);
438 goto out;
439 }
440 if (em->start != offset || em->len != 2 * sectorsize) {
441 test_err(
442 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
443 offset, 2 * sectorsize, em->start, em->len);
444 goto out;
445 }
446 if (em->flags != 0) {
447 test_err("unexpected flags set, want 0 have %lu", em->flags);
448 goto out;
449 }
450 if (em->orig_start != orig_start) {
451 test_err("wrong orig offset, want %llu, have %llu",
452 orig_start, em->orig_start);
453 goto out;
454 }
455 disk_bytenr += (em->start - orig_start);
456 if (em->block_start != disk_bytenr) {
457 test_err("wrong block start, want %llu, have %llu",
458 disk_bytenr, em->block_start);
459 goto out;
460 }
461 offset = em->start + em->len;
462 free_extent_map(em);
463
464 /* Prealloc extent */
465 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
466 if (IS_ERR(em)) {
467 test_err("got an error when we shouldn't have");
468 goto out;
469 }
470 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
471 test_err("expected a real extent, got %llu", em->block_start);
472 goto out;
473 }
474 if (em->start != offset || em->len != sectorsize) {
475 test_err(
476 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
477 offset, sectorsize, em->start, em->len);
478 goto out;
479 }
480 if (em->flags != prealloc_only) {
481 test_err("unexpected flags set, want %lu have %lu",
482 prealloc_only, em->flags);
483 goto out;
484 }
485 if (em->orig_start != em->start) {
486 test_err("wrong orig offset, want %llu, have %llu", em->start,
487 em->orig_start);
488 goto out;
489 }
490 offset = em->start + em->len;
491 free_extent_map(em);
492
493 /* The next 3 are a half written prealloc extent */
494 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
495 if (IS_ERR(em)) {
496 test_err("got an error when we shouldn't have");
497 goto out;
498 }
499 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
500 test_err("expected a real extent, got %llu", em->block_start);
501 goto out;
502 }
503 if (em->start != offset || em->len != sectorsize) {
504 test_err(
505 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
506 offset, sectorsize, em->start, em->len);
507 goto out;
508 }
509 if (em->flags != prealloc_only) {
510 test_err("unexpected flags set, want %lu have %lu",
511 prealloc_only, em->flags);
512 goto out;
513 }
514 if (em->orig_start != em->start) {
515 test_err("wrong orig offset, want %llu, have %llu", em->start,
516 em->orig_start);
517 goto out;
518 }
519 disk_bytenr = em->block_start;
520 orig_start = em->start;
521 offset = em->start + em->len;
522 free_extent_map(em);
523
524 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
525 if (IS_ERR(em)) {
526 test_err("got an error when we shouldn't have");
527 goto out;
528 }
529 if (em->block_start >= EXTENT_MAP_HOLE) {
530 test_err("expected a real extent, got %llu", em->block_start);
531 goto out;
532 }
533 if (em->start != offset || em->len != sectorsize) {
534 test_err(
535 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
536 offset, sectorsize, em->start, em->len);
537 goto out;
538 }
539 if (em->flags != 0) {
540 test_err("unexpected flags set, want 0 have %lu", em->flags);
541 goto out;
542 }
543 if (em->orig_start != orig_start) {
544 test_err("unexpected orig offset, wanted %llu, have %llu",
545 orig_start, em->orig_start);
546 goto out;
547 }
548 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
549 test_err("unexpected block start, wanted %llu, have %llu",
550 disk_bytenr + (em->start - em->orig_start),
551 em->block_start);
552 goto out;
553 }
554 offset = em->start + em->len;
555 free_extent_map(em);
556
557 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
558 if (IS_ERR(em)) {
559 test_err("got an error when we shouldn't have");
560 goto out;
561 }
562 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
563 test_err("expected a real extent, got %llu", em->block_start);
564 goto out;
565 }
566 if (em->start != offset || em->len != 2 * sectorsize) {
567 test_err(
568 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
569 offset, 2 * sectorsize, em->start, em->len);
570 goto out;
571 }
572 if (em->flags != prealloc_only) {
573 test_err("unexpected flags set, want %lu have %lu",
574 prealloc_only, em->flags);
575 goto out;
576 }
577 if (em->orig_start != orig_start) {
578 test_err("wrong orig offset, want %llu, have %llu", orig_start,
579 em->orig_start);
580 goto out;
581 }
582 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
583 test_err("unexpected block start, wanted %llu, have %llu",
584 disk_bytenr + (em->start - em->orig_start),
585 em->block_start);
586 goto out;
587 }
588 offset = em->start + em->len;
589 free_extent_map(em);
590
591 /* Now for the compressed extent */
592 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
593 if (IS_ERR(em)) {
594 test_err("got an error when we shouldn't have");
595 goto out;
596 }
597 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
598 test_err("expected a real extent, got %llu", em->block_start);
599 goto out;
600 }
601 if (em->start != offset || em->len != 2 * sectorsize) {
602 test_err(
603 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
604 offset, 2 * sectorsize, em->start, em->len);
605 goto out;
606 }
607 if (em->flags != compressed_only) {
608 test_err("unexpected flags set, want %lu have %lu",
609 compressed_only, em->flags);
610 goto out;
611 }
612 if (em->orig_start != em->start) {
613 test_err("wrong orig offset, want %llu, have %llu",
614 em->start, em->orig_start);
615 goto out;
616 }
617 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
618 test_err("unexpected compress type, wanted %d, got %d",
619 BTRFS_COMPRESS_ZLIB, em->compress_type);
620 goto out;
621 }
622 offset = em->start + em->len;
623 free_extent_map(em);
624
625 /* Split compressed extent */
626 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
627 if (IS_ERR(em)) {
628 test_err("got an error when we shouldn't have");
629 goto out;
630 }
631 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
632 test_err("expected a real extent, got %llu", em->block_start);
633 goto out;
634 }
635 if (em->start != offset || em->len != sectorsize) {
636 test_err(
637 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
638 offset, sectorsize, em->start, em->len);
639 goto out;
640 }
641 if (em->flags != compressed_only) {
642 test_err("unexpected flags set, want %lu have %lu",
643 compressed_only, em->flags);
644 goto out;
645 }
646 if (em->orig_start != em->start) {
647 test_err("wrong orig offset, want %llu, have %llu",
648 em->start, em->orig_start);
649 goto out;
650 }
651 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
652 test_err("unexpected compress type, wanted %d, got %d",
653 BTRFS_COMPRESS_ZLIB, em->compress_type);
654 goto out;
655 }
656 disk_bytenr = em->block_start;
657 orig_start = em->start;
658 offset = em->start + em->len;
659 free_extent_map(em);
660
661 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
662 if (IS_ERR(em)) {
663 test_err("got an error when we shouldn't have");
664 goto out;
665 }
666 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
667 test_err("expected a real extent, got %llu", em->block_start);
668 goto out;
669 }
670 if (em->start != offset || em->len != sectorsize) {
671 test_err(
672 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
673 offset, sectorsize, em->start, em->len);
674 goto out;
675 }
676 if (em->flags != 0) {
677 test_err("unexpected flags set, want 0 have %lu", em->flags);
678 goto out;
679 }
680 if (em->orig_start != em->start) {
681 test_err("wrong orig offset, want %llu, have %llu", em->start,
682 em->orig_start);
683 goto out;
684 }
685 offset = em->start + em->len;
686 free_extent_map(em);
687
688 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
689 if (IS_ERR(em)) {
690 test_err("got an error when we shouldn't have");
691 goto out;
692 }
693 if (em->block_start != disk_bytenr) {
694 test_err("block start does not match, want %llu got %llu",
695 disk_bytenr, em->block_start);
696 goto out;
697 }
698 if (em->start != offset || em->len != 2 * sectorsize) {
699 test_err(
700 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
701 offset, 2 * sectorsize, em->start, em->len);
702 goto out;
703 }
704 if (em->flags != compressed_only) {
705 test_err("unexpected flags set, want %lu have %lu",
706 compressed_only, em->flags);
707 goto out;
708 }
709 if (em->orig_start != orig_start) {
710 test_err("wrong orig offset, want %llu, have %llu",
711 em->start, orig_start);
712 goto out;
713 }
714 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
715 test_err("unexpected compress type, wanted %d, got %d",
716 BTRFS_COMPRESS_ZLIB, em->compress_type);
717 goto out;
718 }
719 offset = em->start + em->len;
720 free_extent_map(em);
721
722 /* A hole between regular extents but no hole extent */
723 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6, sectorsize);
724 if (IS_ERR(em)) {
725 test_err("got an error when we shouldn't have");
726 goto out;
727 }
728 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
729 test_err("expected a real extent, got %llu", em->block_start);
730 goto out;
731 }
732 if (em->start != offset || em->len != sectorsize) {
733 test_err(
734 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
735 offset, sectorsize, em->start, em->len);
736 goto out;
737 }
738 if (em->flags != 0) {
739 test_err("unexpected flags set, want 0 have %lu", em->flags);
740 goto out;
741 }
742 if (em->orig_start != em->start) {
743 test_err("wrong orig offset, want %llu, have %llu", em->start,
744 em->orig_start);
745 goto out;
746 }
747 offset = em->start + em->len;
748 free_extent_map(em);
749
750 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M);
751 if (IS_ERR(em)) {
752 test_err("got an error when we shouldn't have");
753 goto out;
754 }
755 if (em->block_start != EXTENT_MAP_HOLE) {
756 test_err("expected a hole extent, got %llu", em->block_start);
757 goto out;
758 }
759 /*
760 * Currently we just return a length that we requested rather than the
761 * length of the actual hole, if this changes we'll have to change this
762 * test.
763 */
764 if (em->start != offset || em->len != 3 * sectorsize) {
765 test_err(
766 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
767 offset, 3 * sectorsize, em->start, em->len);
768 goto out;
769 }
770 if (em->flags != vacancy_only) {
771 test_err("unexpected flags set, want %lu have %lu",
772 vacancy_only, em->flags);
773 goto out;
774 }
775 if (em->orig_start != em->start) {
776 test_err("wrong orig offset, want %llu, have %llu", em->start,
777 em->orig_start);
778 goto out;
779 }
780 offset = em->start + em->len;
781 free_extent_map(em);
782
783 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
784 if (IS_ERR(em)) {
785 test_err("got an error when we shouldn't have");
786 goto out;
787 }
788 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
789 test_err("expected a real extent, got %llu", em->block_start);
790 goto out;
791 }
792 if (em->start != offset || em->len != sectorsize) {
793 test_err(
794 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
795 offset, sectorsize, em->start, em->len);
796 goto out;
797 }
798 if (em->flags != 0) {
799 test_err("unexpected flags set, want 0 have %lu", em->flags);
800 goto out;
801 }
802 if (em->orig_start != em->start) {
803 test_err("wrong orig offset, want %llu, have %llu", em->start,
804 em->orig_start);
805 goto out;
806 }
807 ret = 0;
808 out:
809 if (!IS_ERR(em))
810 free_extent_map(em);
811 iput(inode);
812 btrfs_free_dummy_root(root);
813 btrfs_free_dummy_fs_info(fs_info);
814 return ret;
815 }
816
test_hole_first(u32 sectorsize,u32 nodesize)817 static int test_hole_first(u32 sectorsize, u32 nodesize)
818 {
819 struct btrfs_fs_info *fs_info = NULL;
820 struct inode *inode = NULL;
821 struct btrfs_root *root = NULL;
822 struct extent_map *em = NULL;
823 int ret = -ENOMEM;
824
825 test_msg("running hole first btrfs_get_extent test");
826
827 inode = btrfs_new_test_inode();
828 if (!inode) {
829 test_std_err(TEST_ALLOC_INODE);
830 return ret;
831 }
832
833 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
834 if (!fs_info) {
835 test_std_err(TEST_ALLOC_FS_INFO);
836 goto out;
837 }
838
839 root = btrfs_alloc_dummy_root(fs_info);
840 if (IS_ERR(root)) {
841 test_std_err(TEST_ALLOC_ROOT);
842 goto out;
843 }
844
845 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
846 if (!root->node) {
847 test_std_err(TEST_ALLOC_ROOT);
848 goto out;
849 }
850
851 btrfs_set_header_nritems(root->node, 0);
852 btrfs_set_header_level(root->node, 0);
853 BTRFS_I(inode)->root = root;
854 ret = -EINVAL;
855
856 /*
857 * Need a blank inode item here just so we don't confuse
858 * btrfs_get_extent.
859 */
860 insert_inode_item_key(root);
861 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
862 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
863 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize);
864 if (IS_ERR(em)) {
865 test_err("got an error when we shouldn't have");
866 goto out;
867 }
868 if (em->block_start != EXTENT_MAP_HOLE) {
869 test_err("expected a hole, got %llu", em->block_start);
870 goto out;
871 }
872 if (em->start != 0 || em->len != sectorsize) {
873 test_err(
874 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
875 sectorsize, em->start, em->len);
876 goto out;
877 }
878 if (em->flags != vacancy_only) {
879 test_err("wrong flags, wanted %lu, have %lu", vacancy_only,
880 em->flags);
881 goto out;
882 }
883 free_extent_map(em);
884
885 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize, 2 * sectorsize);
886 if (IS_ERR(em)) {
887 test_err("got an error when we shouldn't have");
888 goto out;
889 }
890 if (em->block_start != sectorsize) {
891 test_err("expected a real extent, got %llu", em->block_start);
892 goto out;
893 }
894 if (em->start != sectorsize || em->len != sectorsize) {
895 test_err(
896 "unexpected extent wanted start %u len %u, got start %llu len %llu",
897 sectorsize, sectorsize, em->start, em->len);
898 goto out;
899 }
900 if (em->flags != 0) {
901 test_err("unexpected flags set, wanted 0 got %lu",
902 em->flags);
903 goto out;
904 }
905 ret = 0;
906 out:
907 if (!IS_ERR(em))
908 free_extent_map(em);
909 iput(inode);
910 btrfs_free_dummy_root(root);
911 btrfs_free_dummy_fs_info(fs_info);
912 return ret;
913 }
914
test_extent_accounting(u32 sectorsize,u32 nodesize)915 static int test_extent_accounting(u32 sectorsize, u32 nodesize)
916 {
917 struct btrfs_fs_info *fs_info = NULL;
918 struct inode *inode = NULL;
919 struct btrfs_root *root = NULL;
920 int ret = -ENOMEM;
921
922 test_msg("running outstanding_extents tests");
923
924 inode = btrfs_new_test_inode();
925 if (!inode) {
926 test_std_err(TEST_ALLOC_INODE);
927 return ret;
928 }
929
930 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
931 if (!fs_info) {
932 test_std_err(TEST_ALLOC_FS_INFO);
933 goto out;
934 }
935
936 root = btrfs_alloc_dummy_root(fs_info);
937 if (IS_ERR(root)) {
938 test_std_err(TEST_ALLOC_ROOT);
939 goto out;
940 }
941
942 BTRFS_I(inode)->root = root;
943
944 /* [BTRFS_MAX_EXTENT_SIZE] */
945 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), 0,
946 BTRFS_MAX_EXTENT_SIZE - 1, 0, NULL);
947 if (ret) {
948 test_err("btrfs_set_extent_delalloc returned %d", ret);
949 goto out;
950 }
951 if (BTRFS_I(inode)->outstanding_extents != 1) {
952 ret = -EINVAL;
953 test_err("miscount, wanted 1, got %u",
954 BTRFS_I(inode)->outstanding_extents);
955 goto out;
956 }
957
958 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
959 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE,
960 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
961 0, NULL);
962 if (ret) {
963 test_err("btrfs_set_extent_delalloc returned %d", ret);
964 goto out;
965 }
966 if (BTRFS_I(inode)->outstanding_extents != 2) {
967 ret = -EINVAL;
968 test_err("miscount, wanted 2, got %u",
969 BTRFS_I(inode)->outstanding_extents);
970 goto out;
971 }
972
973 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
974 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
975 BTRFS_MAX_EXTENT_SIZE >> 1,
976 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
977 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
978 EXTENT_UPTODATE, NULL);
979 if (ret) {
980 test_err("clear_extent_bit returned %d", ret);
981 goto out;
982 }
983 if (BTRFS_I(inode)->outstanding_extents != 2) {
984 ret = -EINVAL;
985 test_err("miscount, wanted 2, got %u",
986 BTRFS_I(inode)->outstanding_extents);
987 goto out;
988 }
989
990 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
991 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE >> 1,
992 (BTRFS_MAX_EXTENT_SIZE >> 1)
993 + sectorsize - 1,
994 0, NULL);
995 if (ret) {
996 test_err("btrfs_set_extent_delalloc returned %d", ret);
997 goto out;
998 }
999 if (BTRFS_I(inode)->outstanding_extents != 2) {
1000 ret = -EINVAL;
1001 test_err("miscount, wanted 2, got %u",
1002 BTRFS_I(inode)->outstanding_extents);
1003 goto out;
1004 }
1005
1006 /*
1007 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1008 */
1009 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1010 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1011 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1012 0, NULL);
1013 if (ret) {
1014 test_err("btrfs_set_extent_delalloc returned %d", ret);
1015 goto out;
1016 }
1017 if (BTRFS_I(inode)->outstanding_extents != 4) {
1018 ret = -EINVAL;
1019 test_err("miscount, wanted 4, got %u",
1020 BTRFS_I(inode)->outstanding_extents);
1021 goto out;
1022 }
1023
1024 /*
1025 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1026 */
1027 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1028 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1029 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1030 if (ret) {
1031 test_err("btrfs_set_extent_delalloc returned %d", ret);
1032 goto out;
1033 }
1034 if (BTRFS_I(inode)->outstanding_extents != 3) {
1035 ret = -EINVAL;
1036 test_err("miscount, wanted 3, got %u",
1037 BTRFS_I(inode)->outstanding_extents);
1038 goto out;
1039 }
1040
1041 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1042 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1043 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1044 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1045 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1046 EXTENT_UPTODATE, NULL);
1047 if (ret) {
1048 test_err("clear_extent_bit returned %d", ret);
1049 goto out;
1050 }
1051 if (BTRFS_I(inode)->outstanding_extents != 4) {
1052 ret = -EINVAL;
1053 test_err("miscount, wanted 4, got %u",
1054 BTRFS_I(inode)->outstanding_extents);
1055 goto out;
1056 }
1057
1058 /*
1059 * Refill the hole again just for good measure, because I thought it
1060 * might fail and I'd rather satisfy my paranoia at this point.
1061 */
1062 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1063 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1064 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1065 if (ret) {
1066 test_err("btrfs_set_extent_delalloc returned %d", ret);
1067 goto out;
1068 }
1069 if (BTRFS_I(inode)->outstanding_extents != 3) {
1070 ret = -EINVAL;
1071 test_err("miscount, wanted 3, got %u",
1072 BTRFS_I(inode)->outstanding_extents);
1073 goto out;
1074 }
1075
1076 /* Empty */
1077 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1078 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1079 EXTENT_UPTODATE, NULL);
1080 if (ret) {
1081 test_err("clear_extent_bit returned %d", ret);
1082 goto out;
1083 }
1084 if (BTRFS_I(inode)->outstanding_extents) {
1085 ret = -EINVAL;
1086 test_err("miscount, wanted 0, got %u",
1087 BTRFS_I(inode)->outstanding_extents);
1088 goto out;
1089 }
1090 ret = 0;
1091 out:
1092 if (ret)
1093 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1094 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1095 EXTENT_UPTODATE, NULL);
1096 iput(inode);
1097 btrfs_free_dummy_root(root);
1098 btrfs_free_dummy_fs_info(fs_info);
1099 return ret;
1100 }
1101
btrfs_test_inodes(u32 sectorsize,u32 nodesize)1102 int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1103 {
1104 int ret;
1105
1106 test_msg("running inode tests");
1107
1108 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1109 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1110
1111 ret = test_btrfs_get_extent(sectorsize, nodesize);
1112 if (ret)
1113 return ret;
1114 ret = test_hole_first(sectorsize, nodesize);
1115 if (ret)
1116 return ret;
1117 return test_extent_accounting(sectorsize, nodesize);
1118 }
1119
