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 setup_items_for_insert(root, &path, &key, &value_len, value_len,
37 value_len + sizeof(struct btrfs_item), 1);
38 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
39 btrfs_set_file_extent_generation(leaf, fi, 1);
40 btrfs_set_file_extent_type(leaf, fi, type);
41 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
42 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
43 btrfs_set_file_extent_offset(leaf, fi, offset);
44 btrfs_set_file_extent_num_bytes(leaf, fi, len);
45 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
46 btrfs_set_file_extent_compression(leaf, fi, compression);
47 btrfs_set_file_extent_encryption(leaf, fi, 0);
48 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
49 }
50
insert_inode_item_key(struct btrfs_root * root)51 static void insert_inode_item_key(struct btrfs_root *root)
52 {
53 struct btrfs_path path;
54 struct extent_buffer *leaf = root->node;
55 struct btrfs_key key;
56 u32 value_len = 0;
57
58 memset(&path, 0, sizeof(path));
59
60 path.nodes[0] = leaf;
61 path.slots[0] = 0;
62
63 key.objectid = BTRFS_INODE_ITEM_KEY;
64 key.type = BTRFS_INODE_ITEM_KEY;
65 key.offset = 0;
66
67 setup_items_for_insert(root, &path, &key, &value_len, value_len,
68 value_len + sizeof(struct btrfs_item), 1);
69 }
70
71 /*
72 * Build the most complicated map of extents the earth has ever seen. We want
73 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
74 * diagram of how the extents will look though this may not be possible we still
75 * want to make sure everything acts normally (the last number is not inclusive)
76 *
77 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
78 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
79 *
80 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
81 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
82 *
83 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
84 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
85 *
86 * [69635-73731][ 73731 - 86019 ][86019-90115]
87 * [ regular ][ hole but no extent][ regular ]
88 */
setup_file_extents(struct btrfs_root * root,u32 sectorsize)89 static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
90 {
91 int slot = 0;
92 u64 disk_bytenr = SZ_1M;
93 u64 offset = 0;
94
95 /* First we want a hole */
96 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
97 slot);
98 slot++;
99 offset += 5;
100
101 /*
102 * Now we want an inline extent, I don't think this is possible but hey
103 * why not? Also keep in mind if we have an inline extent it counts as
104 * the whole first page. If we were to expand it we would have to cow
105 * and we wouldn't have an inline extent anymore.
106 */
107 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
108 slot);
109 slot++;
110 offset = sectorsize;
111
112 /* Now another hole */
113 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
114 slot);
115 slot++;
116 offset += 4;
117
118 /* Now for a regular extent */
119 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
120 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
121 slot++;
122 disk_bytenr += sectorsize;
123 offset += sectorsize - 1;
124
125 /*
126 * Now for 3 extents that were split from a hole punch so we test
127 * offsets properly.
128 */
129 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
130 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
131 slot++;
132 offset += sectorsize;
133 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
134 BTRFS_FILE_EXTENT_REG, 0, slot);
135 slot++;
136 offset += sectorsize;
137 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
138 2 * sectorsize, disk_bytenr, 4 * sectorsize,
139 BTRFS_FILE_EXTENT_REG, 0, slot);
140 slot++;
141 offset += 2 * sectorsize;
142 disk_bytenr += 4 * sectorsize;
143
144 /* Now for a unwritten prealloc extent */
145 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
146 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
147 slot++;
148 offset += sectorsize;
149
150 /*
151 * We want to jack up disk_bytenr a little more so the em stuff doesn't
152 * merge our records.
153 */
154 disk_bytenr += 2 * sectorsize;
155
156 /*
157 * Now for a partially written prealloc extent, basically the same as
158 * the hole punch example above. Ram_bytes never changes when you mark
159 * extents written btw.
160 */
161 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
162 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
163 slot++;
164 offset += sectorsize;
165 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
166 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
167 slot);
168 slot++;
169 offset += sectorsize;
170 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
171 2 * sectorsize, disk_bytenr, 4 * sectorsize,
172 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
173 slot++;
174 offset += 2 * sectorsize;
175 disk_bytenr += 4 * sectorsize;
176
177 /* Now a normal compressed extent */
178 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
179 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
180 BTRFS_COMPRESS_ZLIB, slot);
181 slot++;
182 offset += 2 * sectorsize;
183 /* No merges */
184 disk_bytenr += 2 * sectorsize;
185
186 /* Now a split compressed extent */
187 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
188 sectorsize, BTRFS_FILE_EXTENT_REG,
189 BTRFS_COMPRESS_ZLIB, slot);
190 slot++;
191 offset += sectorsize;
192 insert_extent(root, offset, sectorsize, sectorsize, 0,
193 disk_bytenr + sectorsize, sectorsize,
194 BTRFS_FILE_EXTENT_REG, 0, slot);
195 slot++;
196 offset += sectorsize;
197 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
198 2 * sectorsize, disk_bytenr, sectorsize,
199 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
200 slot++;
201 offset += 2 * sectorsize;
202 disk_bytenr += 2 * sectorsize;
203
204 /* Now extents that have a hole but no hole extent */
205 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
206 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
207 slot++;
208 offset += 4 * sectorsize;
209 disk_bytenr += sectorsize;
210 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
211 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
212 }
213
214 static unsigned long prealloc_only = 0;
215 static unsigned long compressed_only = 0;
216 static unsigned long vacancy_only = 0;
217
test_btrfs_get_extent(u32 sectorsize,u32 nodesize)218 static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
219 {
220 struct btrfs_fs_info *fs_info = NULL;
221 struct inode *inode = NULL;
222 struct btrfs_root *root = NULL;
223 struct extent_map *em = NULL;
224 u64 orig_start;
225 u64 disk_bytenr;
226 u64 offset;
227 int ret = -ENOMEM;
228
229 inode = btrfs_new_test_inode();
230 if (!inode) {
231 test_err("couldn't allocate inode");
232 return ret;
233 }
234
235 inode->i_mode = S_IFREG;
236 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
237 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
238 BTRFS_I(inode)->location.offset = 0;
239
240 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
241 if (!fs_info) {
242 test_err("couldn't allocate dummy fs info");
243 goto out;
244 }
245
246 root = btrfs_alloc_dummy_root(fs_info);
247 if (IS_ERR(root)) {
248 test_err("couldn't allocate root");
249 goto out;
250 }
251
252 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
253 if (!root->node) {
254 test_err("couldn't allocate dummy buffer");
255 goto out;
256 }
257
258 /*
259 * We will just free a dummy node if it's ref count is 2 so we need an
260 * extra ref so our searches don't accidentally release our page.
261 */
262 extent_buffer_get(root->node);
263 btrfs_set_header_nritems(root->node, 0);
264 btrfs_set_header_level(root->node, 0);
265 ret = -EINVAL;
266
267 /* First with no extents */
268 BTRFS_I(inode)->root = root;
269 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize, 0);
270 if (IS_ERR(em)) {
271 em = NULL;
272 test_err("got an error when we shouldn't have");
273 goto out;
274 }
275 if (em->block_start != EXTENT_MAP_HOLE) {
276 test_err("expected a hole, got %llu", em->block_start);
277 goto out;
278 }
279 free_extent_map(em);
280 btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
281
282 /*
283 * All of the magic numbers are based on the mapping setup in
284 * setup_file_extents, so if you change anything there you need to
285 * update the comment and update the expected values below.
286 */
287 setup_file_extents(root, sectorsize);
288
289 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1, 0);
290 if (IS_ERR(em)) {
291 test_err("got an error when we shouldn't have");
292 goto out;
293 }
294 if (em->block_start != EXTENT_MAP_HOLE) {
295 test_err("expected a hole, got %llu", em->block_start);
296 goto out;
297 }
298 if (em->start != 0 || em->len != 5) {
299 test_err(
300 "unexpected extent wanted start 0 len 5, got start %llu len %llu",
301 em->start, em->len);
302 goto out;
303 }
304 if (em->flags != 0) {
305 test_err("unexpected flags set, want 0 have %lu", em->flags);
306 goto out;
307 }
308 offset = em->start + em->len;
309 free_extent_map(em);
310
311 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
312 if (IS_ERR(em)) {
313 test_err("got an error when we shouldn't have");
314 goto out;
315 }
316 if (em->block_start != EXTENT_MAP_INLINE) {
317 test_err("expected an inline, got %llu", em->block_start);
318 goto out;
319 }
320
321 if (em->start != offset || em->len != (sectorsize - 5)) {
322 test_err(
323 "unexpected extent wanted start %llu len 1, got start %llu len %llu",
324 offset, em->start, em->len);
325 goto out;
326 }
327 if (em->flags != 0) {
328 test_err("unexpected flags set, want 0 have %lu", em->flags);
329 goto out;
330 }
331 /*
332 * We don't test anything else for inline since it doesn't get set
333 * unless we have a page for it to write into. Maybe we should change
334 * this?
335 */
336 offset = em->start + em->len;
337 free_extent_map(em);
338
339 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
340 if (IS_ERR(em)) {
341 test_err("got an error when we shouldn't have");
342 goto out;
343 }
344 if (em->block_start != EXTENT_MAP_HOLE) {
345 test_err("expected a hole, got %llu", em->block_start);
346 goto out;
347 }
348 if (em->start != offset || em->len != 4) {
349 test_err(
350 "unexpected extent wanted start %llu len 4, got start %llu len %llu",
351 offset, em->start, em->len);
352 goto out;
353 }
354 if (em->flags != 0) {
355 test_err("unexpected flags set, want 0 have %lu", em->flags);
356 goto out;
357 }
358 offset = em->start + em->len;
359 free_extent_map(em);
360
361 /* Regular extent */
362 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
363 if (IS_ERR(em)) {
364 test_err("got an error when we shouldn't have");
365 goto out;
366 }
367 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
368 test_err("expected a real extent, got %llu", em->block_start);
369 goto out;
370 }
371 if (em->start != offset || em->len != sectorsize - 1) {
372 test_err(
373 "unexpected extent wanted start %llu len 4095, got start %llu len %llu",
374 offset, em->start, em->len);
375 goto out;
376 }
377 if (em->flags != 0) {
378 test_err("unexpected flags set, want 0 have %lu", em->flags);
379 goto out;
380 }
381 if (em->orig_start != em->start) {
382 test_err("wrong orig offset, want %llu, have %llu", em->start,
383 em->orig_start);
384 goto out;
385 }
386 offset = em->start + em->len;
387 free_extent_map(em);
388
389 /* The next 3 are split extents */
390 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
391 if (IS_ERR(em)) {
392 test_err("got an error when we shouldn't have");
393 goto out;
394 }
395 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
396 test_err("expected a real extent, got %llu", em->block_start);
397 goto out;
398 }
399 if (em->start != offset || em->len != sectorsize) {
400 test_err(
401 "unexpected extent start %llu len %u, got start %llu len %llu",
402 offset, sectorsize, em->start, em->len);
403 goto out;
404 }
405 if (em->flags != 0) {
406 test_err("unexpected flags set, want 0 have %lu", em->flags);
407 goto out;
408 }
409 if (em->orig_start != em->start) {
410 test_err("wrong orig offset, want %llu, have %llu", em->start,
411 em->orig_start);
412 goto out;
413 }
414 disk_bytenr = em->block_start;
415 orig_start = em->start;
416 offset = em->start + em->len;
417 free_extent_map(em);
418
419 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
420 if (IS_ERR(em)) {
421 test_err("got an error when we shouldn't have");
422 goto out;
423 }
424 if (em->block_start != EXTENT_MAP_HOLE) {
425 test_err("expected a hole, got %llu", em->block_start);
426 goto out;
427 }
428 if (em->start != offset || em->len != sectorsize) {
429 test_err(
430 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
431 offset, sectorsize, em->start, em->len);
432 goto out;
433 }
434 if (em->flags != 0) {
435 test_err("unexpected flags set, want 0 have %lu", em->flags);
436 goto out;
437 }
438 offset = em->start + em->len;
439 free_extent_map(em);
440
441 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
442 if (IS_ERR(em)) {
443 test_err("got an error when we shouldn't have");
444 goto out;
445 }
446 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
447 test_err("expected a real extent, got %llu", em->block_start);
448 goto out;
449 }
450 if (em->start != offset || em->len != 2 * sectorsize) {
451 test_err(
452 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
453 offset, 2 * sectorsize, em->start, em->len);
454 goto out;
455 }
456 if (em->flags != 0) {
457 test_err("unexpected flags set, want 0 have %lu", em->flags);
458 goto out;
459 }
460 if (em->orig_start != orig_start) {
461 test_err("wrong orig offset, want %llu, have %llu",
462 orig_start, em->orig_start);
463 goto out;
464 }
465 disk_bytenr += (em->start - orig_start);
466 if (em->block_start != disk_bytenr) {
467 test_err("wrong block start, want %llu, have %llu",
468 disk_bytenr, em->block_start);
469 goto out;
470 }
471 offset = em->start + em->len;
472 free_extent_map(em);
473
474 /* Prealloc extent */
475 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
476 if (IS_ERR(em)) {
477 test_err("got an error when we shouldn't have");
478 goto out;
479 }
480 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
481 test_err("expected a real extent, got %llu", em->block_start);
482 goto out;
483 }
484 if (em->start != offset || em->len != sectorsize) {
485 test_err(
486 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
487 offset, sectorsize, em->start, em->len);
488 goto out;
489 }
490 if (em->flags != prealloc_only) {
491 test_err("unexpected flags set, want %lu have %lu",
492 prealloc_only, em->flags);
493 goto out;
494 }
495 if (em->orig_start != em->start) {
496 test_err("wrong orig offset, want %llu, have %llu", em->start,
497 em->orig_start);
498 goto out;
499 }
500 offset = em->start + em->len;
501 free_extent_map(em);
502
503 /* The next 3 are a half written prealloc extent */
504 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
505 if (IS_ERR(em)) {
506 test_err("got an error when we shouldn't have");
507 goto out;
508 }
509 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
510 test_err("expected a real extent, got %llu", em->block_start);
511 goto out;
512 }
513 if (em->start != offset || em->len != sectorsize) {
514 test_err(
515 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
516 offset, sectorsize, em->start, em->len);
517 goto out;
518 }
519 if (em->flags != prealloc_only) {
520 test_err("unexpected flags set, want %lu have %lu",
521 prealloc_only, em->flags);
522 goto out;
523 }
524 if (em->orig_start != em->start) {
525 test_err("wrong orig offset, want %llu, have %llu", em->start,
526 em->orig_start);
527 goto out;
528 }
529 disk_bytenr = em->block_start;
530 orig_start = em->start;
531 offset = em->start + em->len;
532 free_extent_map(em);
533
534 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
535 if (IS_ERR(em)) {
536 test_err("got an error when we shouldn't have");
537 goto out;
538 }
539 if (em->block_start >= EXTENT_MAP_HOLE) {
540 test_err("expected a real extent, got %llu", em->block_start);
541 goto out;
542 }
543 if (em->start != offset || em->len != sectorsize) {
544 test_err(
545 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
546 offset, sectorsize, em->start, em->len);
547 goto out;
548 }
549 if (em->flags != 0) {
550 test_err("unexpected flags set, want 0 have %lu", em->flags);
551 goto out;
552 }
553 if (em->orig_start != orig_start) {
554 test_err("unexpected orig offset, wanted %llu, have %llu",
555 orig_start, em->orig_start);
556 goto out;
557 }
558 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
559 test_err("unexpected block start, wanted %llu, have %llu",
560 disk_bytenr + (em->start - em->orig_start),
561 em->block_start);
562 goto out;
563 }
564 offset = em->start + em->len;
565 free_extent_map(em);
566
567 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
568 if (IS_ERR(em)) {
569 test_err("got an error when we shouldn't have");
570 goto out;
571 }
572 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
573 test_err("expected a real extent, got %llu", em->block_start);
574 goto out;
575 }
576 if (em->start != offset || em->len != 2 * sectorsize) {
577 test_err(
578 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
579 offset, 2 * sectorsize, em->start, em->len);
580 goto out;
581 }
582 if (em->flags != prealloc_only) {
583 test_err("unexpected flags set, want %lu have %lu",
584 prealloc_only, em->flags);
585 goto out;
586 }
587 if (em->orig_start != orig_start) {
588 test_err("wrong orig offset, want %llu, have %llu", orig_start,
589 em->orig_start);
590 goto out;
591 }
592 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
593 test_err("unexpected block start, wanted %llu, have %llu",
594 disk_bytenr + (em->start - em->orig_start),
595 em->block_start);
596 goto out;
597 }
598 offset = em->start + em->len;
599 free_extent_map(em);
600
601 /* Now for the compressed extent */
602 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
603 if (IS_ERR(em)) {
604 test_err("got an error when we shouldn't have");
605 goto out;
606 }
607 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
608 test_err("expected a real extent, got %llu", em->block_start);
609 goto out;
610 }
611 if (em->start != offset || em->len != 2 * sectorsize) {
612 test_err(
613 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
614 offset, 2 * sectorsize, em->start, em->len);
615 goto out;
616 }
617 if (em->flags != compressed_only) {
618 test_err("unexpected flags set, want %lu have %lu",
619 compressed_only, em->flags);
620 goto out;
621 }
622 if (em->orig_start != em->start) {
623 test_err("wrong orig offset, want %llu, have %llu",
624 em->start, em->orig_start);
625 goto out;
626 }
627 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
628 test_err("unexpected compress type, wanted %d, got %d",
629 BTRFS_COMPRESS_ZLIB, em->compress_type);
630 goto out;
631 }
632 offset = em->start + em->len;
633 free_extent_map(em);
634
635 /* Split compressed extent */
636 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
637 if (IS_ERR(em)) {
638 test_err("got an error when we shouldn't have");
639 goto out;
640 }
641 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
642 test_err("expected a real extent, got %llu", em->block_start);
643 goto out;
644 }
645 if (em->start != offset || em->len != sectorsize) {
646 test_err(
647 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
648 offset, sectorsize, em->start, em->len);
649 goto out;
650 }
651 if (em->flags != compressed_only) {
652 test_err("unexpected flags set, want %lu have %lu",
653 compressed_only, em->flags);
654 goto out;
655 }
656 if (em->orig_start != em->start) {
657 test_err("wrong orig offset, want %llu, have %llu",
658 em->start, em->orig_start);
659 goto out;
660 }
661 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
662 test_err("unexpected compress type, wanted %d, got %d",
663 BTRFS_COMPRESS_ZLIB, em->compress_type);
664 goto out;
665 }
666 disk_bytenr = em->block_start;
667 orig_start = em->start;
668 offset = em->start + em->len;
669 free_extent_map(em);
670
671 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
672 if (IS_ERR(em)) {
673 test_err("got an error when we shouldn't have");
674 goto out;
675 }
676 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
677 test_err("expected a real extent, got %llu", em->block_start);
678 goto out;
679 }
680 if (em->start != offset || em->len != sectorsize) {
681 test_err(
682 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
683 offset, sectorsize, em->start, em->len);
684 goto out;
685 }
686 if (em->flags != 0) {
687 test_err("unexpected flags set, want 0 have %lu", em->flags);
688 goto out;
689 }
690 if (em->orig_start != em->start) {
691 test_err("wrong orig offset, want %llu, have %llu", em->start,
692 em->orig_start);
693 goto out;
694 }
695 offset = em->start + em->len;
696 free_extent_map(em);
697
698 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
699 if (IS_ERR(em)) {
700 test_err("got an error when we shouldn't have");
701 goto out;
702 }
703 if (em->block_start != disk_bytenr) {
704 test_err("block start does not match, want %llu got %llu",
705 disk_bytenr, em->block_start);
706 goto out;
707 }
708 if (em->start != offset || em->len != 2 * sectorsize) {
709 test_err(
710 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
711 offset, 2 * sectorsize, em->start, em->len);
712 goto out;
713 }
714 if (em->flags != compressed_only) {
715 test_err("unexpected flags set, want %lu have %lu",
716 compressed_only, em->flags);
717 goto out;
718 }
719 if (em->orig_start != orig_start) {
720 test_err("wrong orig offset, want %llu, have %llu",
721 em->start, orig_start);
722 goto out;
723 }
724 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
725 test_err("unexpected compress type, wanted %d, got %d",
726 BTRFS_COMPRESS_ZLIB, em->compress_type);
727 goto out;
728 }
729 offset = em->start + em->len;
730 free_extent_map(em);
731
732 /* A hole between regular extents but no hole extent */
733 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6,
734 sectorsize, 0);
735 if (IS_ERR(em)) {
736 test_err("got an error when we shouldn't have");
737 goto out;
738 }
739 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
740 test_err("expected a real extent, got %llu", em->block_start);
741 goto out;
742 }
743 if (em->start != offset || em->len != sectorsize) {
744 test_err(
745 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
746 offset, sectorsize, em->start, em->len);
747 goto out;
748 }
749 if (em->flags != 0) {
750 test_err("unexpected flags set, want 0 have %lu", em->flags);
751 goto out;
752 }
753 if (em->orig_start != em->start) {
754 test_err("wrong orig offset, want %llu, have %llu", em->start,
755 em->orig_start);
756 goto out;
757 }
758 offset = em->start + em->len;
759 free_extent_map(em);
760
761 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M, 0);
762 if (IS_ERR(em)) {
763 test_err("got an error when we shouldn't have");
764 goto out;
765 }
766 if (em->block_start != EXTENT_MAP_HOLE) {
767 test_err("expected a hole extent, got %llu", em->block_start);
768 goto out;
769 }
770 /*
771 * Currently we just return a length that we requested rather than the
772 * length of the actual hole, if this changes we'll have to change this
773 * test.
774 */
775 if (em->start != offset || em->len != 3 * sectorsize) {
776 test_err(
777 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
778 offset, 3 * sectorsize, em->start, em->len);
779 goto out;
780 }
781 if (em->flags != vacancy_only) {
782 test_err("unexpected flags set, want %lu have %lu",
783 vacancy_only, em->flags);
784 goto out;
785 }
786 if (em->orig_start != em->start) {
787 test_err("wrong orig offset, want %llu, have %llu", em->start,
788 em->orig_start);
789 goto out;
790 }
791 offset = em->start + em->len;
792 free_extent_map(em);
793
794 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
795 if (IS_ERR(em)) {
796 test_err("got an error when we shouldn't have");
797 goto out;
798 }
799 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
800 test_err("expected a real extent, got %llu", em->block_start);
801 goto out;
802 }
803 if (em->start != offset || em->len != sectorsize) {
804 test_err(
805 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
806 offset, sectorsize, em->start, em->len);
807 goto out;
808 }
809 if (em->flags != 0) {
810 test_err("unexpected flags set, want 0 have %lu", em->flags);
811 goto out;
812 }
813 if (em->orig_start != em->start) {
814 test_err("wrong orig offset, want %llu, have %llu", em->start,
815 em->orig_start);
816 goto out;
817 }
818 ret = 0;
819 out:
820 if (!IS_ERR(em))
821 free_extent_map(em);
822 iput(inode);
823 btrfs_free_dummy_root(root);
824 btrfs_free_dummy_fs_info(fs_info);
825 return ret;
826 }
827
test_hole_first(u32 sectorsize,u32 nodesize)828 static int test_hole_first(u32 sectorsize, u32 nodesize)
829 {
830 struct btrfs_fs_info *fs_info = NULL;
831 struct inode *inode = NULL;
832 struct btrfs_root *root = NULL;
833 struct extent_map *em = NULL;
834 int ret = -ENOMEM;
835
836 inode = btrfs_new_test_inode();
837 if (!inode) {
838 test_err("couldn't allocate inode");
839 return ret;
840 }
841
842 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
843 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
844 BTRFS_I(inode)->location.offset = 0;
845
846 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
847 if (!fs_info) {
848 test_err("couldn't allocate dummy fs info");
849 goto out;
850 }
851
852 root = btrfs_alloc_dummy_root(fs_info);
853 if (IS_ERR(root)) {
854 test_err("couldn't allocate root");
855 goto out;
856 }
857
858 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
859 if (!root->node) {
860 test_err("couldn't allocate dummy buffer");
861 goto out;
862 }
863
864 extent_buffer_get(root->node);
865 btrfs_set_header_nritems(root->node, 0);
866 btrfs_set_header_level(root->node, 0);
867 BTRFS_I(inode)->root = root;
868 ret = -EINVAL;
869
870 /*
871 * Need a blank inode item here just so we don't confuse
872 * btrfs_get_extent.
873 */
874 insert_inode_item_key(root);
875 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
876 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
877 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize, 0);
878 if (IS_ERR(em)) {
879 test_err("got an error when we shouldn't have");
880 goto out;
881 }
882 if (em->block_start != EXTENT_MAP_HOLE) {
883 test_err("expected a hole, got %llu", em->block_start);
884 goto out;
885 }
886 if (em->start != 0 || em->len != sectorsize) {
887 test_err(
888 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
889 sectorsize, em->start, em->len);
890 goto out;
891 }
892 if (em->flags != vacancy_only) {
893 test_err("wrong flags, wanted %lu, have %lu", vacancy_only,
894 em->flags);
895 goto out;
896 }
897 free_extent_map(em);
898
899 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize,
900 2 * sectorsize, 0);
901 if (IS_ERR(em)) {
902 test_err("got an error when we shouldn't have");
903 goto out;
904 }
905 if (em->block_start != sectorsize) {
906 test_err("expected a real extent, got %llu", em->block_start);
907 goto out;
908 }
909 if (em->start != sectorsize || em->len != sectorsize) {
910 test_err(
911 "unexpected extent wanted start %u len %u, got start %llu len %llu",
912 sectorsize, sectorsize, em->start, em->len);
913 goto out;
914 }
915 if (em->flags != 0) {
916 test_err("unexpected flags set, wanted 0 got %lu",
917 em->flags);
918 goto out;
919 }
920 ret = 0;
921 out:
922 if (!IS_ERR(em))
923 free_extent_map(em);
924 iput(inode);
925 btrfs_free_dummy_root(root);
926 btrfs_free_dummy_fs_info(fs_info);
927 return ret;
928 }
929
test_extent_accounting(u32 sectorsize,u32 nodesize)930 static int test_extent_accounting(u32 sectorsize, u32 nodesize)
931 {
932 struct btrfs_fs_info *fs_info = NULL;
933 struct inode *inode = NULL;
934 struct btrfs_root *root = NULL;
935 int ret = -ENOMEM;
936
937 inode = btrfs_new_test_inode();
938 if (!inode) {
939 test_err("couldn't allocate inode");
940 return ret;
941 }
942
943 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
944 if (!fs_info) {
945 test_err("couldn't allocate dummy fs info");
946 goto out;
947 }
948
949 root = btrfs_alloc_dummy_root(fs_info);
950 if (IS_ERR(root)) {
951 test_err("couldn't allocate root");
952 goto out;
953 }
954
955 BTRFS_I(inode)->root = root;
956 btrfs_test_inode_set_ops(inode);
957
958 /* [BTRFS_MAX_EXTENT_SIZE] */
959 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0,
960 NULL, 0);
961 if (ret) {
962 test_err("btrfs_set_extent_delalloc returned %d", ret);
963 goto out;
964 }
965 if (BTRFS_I(inode)->outstanding_extents != 1) {
966 ret = -EINVAL;
967 test_err("miscount, wanted 1, got %u",
968 BTRFS_I(inode)->outstanding_extents);
969 goto out;
970 }
971
972 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
973 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
974 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
975 0, NULL, 0);
976 if (ret) {
977 test_err("btrfs_set_extent_delalloc returned %d", ret);
978 goto out;
979 }
980 if (BTRFS_I(inode)->outstanding_extents != 2) {
981 ret = -EINVAL;
982 test_err("miscount, wanted 2, got %u",
983 BTRFS_I(inode)->outstanding_extents);
984 goto out;
985 }
986
987 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
988 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
989 BTRFS_MAX_EXTENT_SIZE >> 1,
990 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
991 EXTENT_DELALLOC | EXTENT_DIRTY |
992 EXTENT_UPTODATE, 0, 0, NULL);
993 if (ret) {
994 test_err("clear_extent_bit returned %d", ret);
995 goto out;
996 }
997 if (BTRFS_I(inode)->outstanding_extents != 2) {
998 ret = -EINVAL;
999 test_err("miscount, wanted 2, got %u",
1000 BTRFS_I(inode)->outstanding_extents);
1001 goto out;
1002 }
1003
1004 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
1005 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
1006 (BTRFS_MAX_EXTENT_SIZE >> 1)
1007 + sectorsize - 1,
1008 0, NULL, 0);
1009 if (ret) {
1010 test_err("btrfs_set_extent_delalloc returned %d", ret);
1011 goto out;
1012 }
1013 if (BTRFS_I(inode)->outstanding_extents != 2) {
1014 ret = -EINVAL;
1015 test_err("miscount, wanted 2, got %u",
1016 BTRFS_I(inode)->outstanding_extents);
1017 goto out;
1018 }
1019
1020 /*
1021 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1022 */
1023 ret = btrfs_set_extent_delalloc(inode,
1024 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1025 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1026 0, NULL, 0);
1027 if (ret) {
1028 test_err("btrfs_set_extent_delalloc returned %d", ret);
1029 goto out;
1030 }
1031 if (BTRFS_I(inode)->outstanding_extents != 4) {
1032 ret = -EINVAL;
1033 test_err("miscount, wanted 4, got %u",
1034 BTRFS_I(inode)->outstanding_extents);
1035 goto out;
1036 }
1037
1038 /*
1039 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1040 */
1041 ret = btrfs_set_extent_delalloc(inode,
1042 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1043 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
1044 if (ret) {
1045 test_err("btrfs_set_extent_delalloc returned %d", ret);
1046 goto out;
1047 }
1048 if (BTRFS_I(inode)->outstanding_extents != 3) {
1049 ret = -EINVAL;
1050 test_err("miscount, wanted 3, got %u",
1051 BTRFS_I(inode)->outstanding_extents);
1052 goto out;
1053 }
1054
1055 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1056 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1057 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1058 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1059 EXTENT_DIRTY | EXTENT_DELALLOC |
1060 EXTENT_UPTODATE, 0, 0, NULL);
1061 if (ret) {
1062 test_err("clear_extent_bit returned %d", ret);
1063 goto out;
1064 }
1065 if (BTRFS_I(inode)->outstanding_extents != 4) {
1066 ret = -EINVAL;
1067 test_err("miscount, wanted 4, got %u",
1068 BTRFS_I(inode)->outstanding_extents);
1069 goto out;
1070 }
1071
1072 /*
1073 * Refill the hole again just for good measure, because I thought it
1074 * might fail and I'd rather satisfy my paranoia at this point.
1075 */
1076 ret = btrfs_set_extent_delalloc(inode,
1077 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1078 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
1079 if (ret) {
1080 test_err("btrfs_set_extent_delalloc returned %d", ret);
1081 goto out;
1082 }
1083 if (BTRFS_I(inode)->outstanding_extents != 3) {
1084 ret = -EINVAL;
1085 test_err("miscount, wanted 3, got %u",
1086 BTRFS_I(inode)->outstanding_extents);
1087 goto out;
1088 }
1089
1090 /* Empty */
1091 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1092 EXTENT_DIRTY | EXTENT_DELALLOC |
1093 EXTENT_UPTODATE, 0, 0, NULL);
1094 if (ret) {
1095 test_err("clear_extent_bit returned %d", ret);
1096 goto out;
1097 }
1098 if (BTRFS_I(inode)->outstanding_extents) {
1099 ret = -EINVAL;
1100 test_err("miscount, wanted 0, got %u",
1101 BTRFS_I(inode)->outstanding_extents);
1102 goto out;
1103 }
1104 ret = 0;
1105 out:
1106 if (ret)
1107 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1108 EXTENT_DIRTY | EXTENT_DELALLOC |
1109 EXTENT_UPTODATE, 0, 0, NULL);
1110 iput(inode);
1111 btrfs_free_dummy_root(root);
1112 btrfs_free_dummy_fs_info(fs_info);
1113 return ret;
1114 }
1115
btrfs_test_inodes(u32 sectorsize,u32 nodesize)1116 int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1117 {
1118 int ret;
1119
1120 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1121 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1122
1123 test_msg("running btrfs_get_extent tests");
1124 ret = test_btrfs_get_extent(sectorsize, nodesize);
1125 if (ret)
1126 return ret;
1127 test_msg("running hole first btrfs_get_extent test");
1128 ret = test_hole_first(sectorsize, nodesize);
1129 if (ret)
1130 return ret;
1131 test_msg("running outstanding_extents tests");
1132 return test_extent_accounting(sectorsize, nodesize);
1133 }
1134