]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - fs/btrfs/tests/inode-tests.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'for-chris-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanan...
[mirror_ubuntu-artful-kernel.git] / fs / btrfs / tests / inode-tests.c
CommitLineData
aaedb55b
JB		 1/*
2 * Copyright (C) 2013 Fusion IO. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
19#include "btrfs-tests.h"
20#include "../ctree.h"
21#include "../btrfs_inode.h"
22#include "../disk-io.h"
23#include "../extent_io.h"
24#include "../volumes.h"
25
aaedb55b
JB		 26static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
27 u64 ram_bytes, u64 offset, u64 disk_bytenr,
28 u64 disk_len, u32 type, u8 compression, int slot)
29{
30 struct btrfs_path path;
31 struct btrfs_file_extent_item *fi;
32 struct extent_buffer *leaf = root->node;
33 struct btrfs_key key;
34 u32 value_len = sizeof(struct btrfs_file_extent_item);
35
36 if (type == BTRFS_FILE_EXTENT_INLINE)
37 value_len += len;
38 memset(&path, 0, sizeof(path));
39
40 path.nodes[0] = leaf;
41 path.slots[0] = slot;
42
43 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
44 key.type = BTRFS_EXTENT_DATA_KEY;
45 key.offset = start;
46
47 setup_items_for_insert(root, &path, &key, &value_len, value_len,
48 value_len + sizeof(struct btrfs_item), 1);
49 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
50 btrfs_set_file_extent_generation(leaf, fi, 1);
51 btrfs_set_file_extent_type(leaf, fi, type);
52 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
53 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
54 btrfs_set_file_extent_offset(leaf, fi, offset);
55 btrfs_set_file_extent_num_bytes(leaf, fi, len);
56 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
57 btrfs_set_file_extent_compression(leaf, fi, compression);
58 btrfs_set_file_extent_encryption(leaf, fi, 0);
59 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
60}
61
0e30db86
JB		 62static void insert_inode_item_key(struct btrfs_root *root)
63{
64 struct btrfs_path path;
65 struct extent_buffer *leaf = root->node;
66 struct btrfs_key key;
67 u32 value_len = 0;
68
69 memset(&path, 0, sizeof(path));
70
71 path.nodes[0] = leaf;
72 path.slots[0] = 0;
73
74 key.objectid = BTRFS_INODE_ITEM_KEY;
75 key.type = BTRFS_INODE_ITEM_KEY;
76 key.offset = 0;
77
78 setup_items_for_insert(root, &path, &key, &value_len, value_len,
79 value_len + sizeof(struct btrfs_item), 1);
80}
81
aaedb55b
JB		 82/*
83 * Build the most complicated map of extents the earth has ever seen. We want
84 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
85 * diagram of how the extents will look though this may not be possible we still
86 * want to make sure everything acts normally (the last number is not inclusive)
87 *
88 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
89 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
90 *
91 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
92 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
93 *
94 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
95 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
96 *
97 * [81920-86016]
98 * [ regular ]
99 */
100static void setup_file_extents(struct btrfs_root *root)
101{
102 int slot = 0;
ee22184b 103 u64 disk_bytenr = SZ_1M;
aaedb55b
JB		 104 u64 offset = 0;
105
106 /* First we want a hole */
107 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
108 slot);
109 slot++;
110 offset += 5;
111
112 /*
113 * Now we want an inline extent, I don't think this is possible but hey
114 * why not? Also keep in mind if we have an inline extent it counts as
115 * the whole first page. If we were to expand it we would have to cow
116 * and we wouldn't have an inline extent anymore.
117 */
118 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
119 slot);
120 slot++;
121 offset = 4096;
122
123 /* Now another hole */
124 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
125 slot);
126 slot++;
127 offset += 4;
128
129 /* Now for a regular extent */
130 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
131 BTRFS_FILE_EXTENT_REG, 0, slot);
132 slot++;
133 disk_bytenr += 4096;
134 offset += 4095;
135
136 /*
137 * Now for 3 extents that were split from a hole punch so we test
138 * offsets properly.
139 */
140 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
141 BTRFS_FILE_EXTENT_REG, 0, slot);
142 slot++;
143 offset += 4096;
144 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
145 0, slot);
146 slot++;
147 offset += 4096;
148 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
149 BTRFS_FILE_EXTENT_REG, 0, slot);
150 slot++;
151 offset += 8192;
152 disk_bytenr += 16384;
153
154 /* Now for a unwritten prealloc extent */
155 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
156 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
157 slot++;
158 offset += 4096;
159
160 /*
161 * We want to jack up disk_bytenr a little more so the em stuff doesn't
162 * merge our records.
163 */
164 disk_bytenr += 8192;
165
166 /*
167 * Now for a partially written prealloc extent, basically the same as
168 * the hole punch example above. Ram_bytes never changes when you mark
169 * extents written btw.
170 */
171 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
172 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
173 slot++;
174 offset += 4096;
175 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
176 BTRFS_FILE_EXTENT_REG, 0, slot);
177 slot++;
178 offset += 4096;
179 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
180 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
181 slot++;
182 offset += 8192;
183 disk_bytenr += 16384;
184
185 /* Now a normal compressed extent */
186 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
187 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
188 slot++;
189 offset += 8192;
190 /* No merges */
191 disk_bytenr += 8192;
192
193 /* Now a split compressed extent */
194 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
195 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
196 slot++;
197 offset += 4096;
198 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
199 BTRFS_FILE_EXTENT_REG, 0, slot);
200 slot++;
201 offset += 4096;
202 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
203 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
204 slot++;
205 offset += 8192;
206 disk_bytenr += 8192;
207
208 /* Now extents that have a hole but no hole extent */
209 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
210 BTRFS_FILE_EXTENT_REG, 0, slot);
211 slot++;
212 offset += 16384;
213 disk_bytenr += 4096;
214 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
215 BTRFS_FILE_EXTENT_REG, 0, slot);
216}
217
218static unsigned long prealloc_only = 0;
219static unsigned long compressed_only = 0;
220static unsigned long vacancy_only = 0;
221
222static noinline int test_btrfs_get_extent(void)
223{
224 struct inode *inode = NULL;
225 struct btrfs_root *root = NULL;
226 struct extent_map *em = NULL;
227 u64 orig_start;
228 u64 disk_bytenr;
229 u64 offset;
230 int ret = -ENOMEM;
231
aaedb55b
JB		 232 inode = btrfs_new_test_inode();
233 if (!inode) {
234 test_msg("Couldn't allocate inode\n");
235 return ret;
236 }
237
238 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
239 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
240 BTRFS_I(inode)->location.offset = 0;
241
242 root = btrfs_alloc_dummy_root();
243 if (IS_ERR(root)) {
244 test_msg("Couldn't allocate root\n");
245 goto out;
246 }
247
248 /*
249 * We do this since btrfs_get_extent wants to assign em->bdev to
250 * root->fs_info->fs_devices->latest_bdev.
251 */
faa2dbf0 252 root->fs_info = btrfs_alloc_dummy_fs_info();
aaedb55b
JB		 253 if (!root->fs_info) {
254 test_msg("Couldn't allocate dummy fs info\n");
255 goto out;
256 }
257
3f556f78 258 root->node = alloc_dummy_extent_buffer(NULL, 4096);
aaedb55b
JB		 259 if (!root->node) {
260 test_msg("Couldn't allocate dummy buffer\n");
261 goto out;
262 }
263
264 /*
265 * We will just free a dummy node if it's ref count is 2 so we need an
266 * extra ref so our searches don't accidently release our page.
267 */
268 extent_buffer_get(root->node);
269 btrfs_set_header_nritems(root->node, 0);
270 btrfs_set_header_level(root->node, 0);
271 ret = -EINVAL;
272
273 /* First with no extents */
274 BTRFS_I(inode)->root = root;
275 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
276 if (IS_ERR(em)) {
277 em = NULL;
278 test_msg("Got an error when we shouldn't have\n");
279 goto out;
280 }
281 if (em->block_start != EXTENT_MAP_HOLE) {
282 test_msg("Expected a hole, got %llu\n", em->block_start);
283 goto out;
284 }
285 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
286 test_msg("Vacancy flag wasn't set properly\n");
287 goto out;
288 }
289 free_extent_map(em);
290 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
291
292 /*
293 * All of the magic numbers are based on the mapping setup in
294 * setup_file_extents, so if you change anything there you need to
295 * update the comment and update the expected values below.
296 */
297 setup_file_extents(root);
298
299 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
300 if (IS_ERR(em)) {
301 test_msg("Got an error when we shouldn't have\n");
302 goto out;
303 }
304 if (em->block_start != EXTENT_MAP_HOLE) {
305 test_msg("Expected a hole, got %llu\n", em->block_start);
306 goto out;
307 }
308 if (em->start != 0 || em->len != 5) {
309 test_msg("Unexpected extent wanted start 0 len 5, got start "
310 "%llu len %llu\n", em->start, em->len);
311 goto out;
312 }
313 if (em->flags != 0) {
314 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
315 goto out;
316 }
317 offset = em->start + em->len;
318 free_extent_map(em);
319
320 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
321 if (IS_ERR(em)) {
322 test_msg("Got an error when we shouldn't have\n");
323 goto out;
324 }
325 if (em->block_start != EXTENT_MAP_INLINE) {
326 test_msg("Expected an inline, got %llu\n", em->block_start);
327 goto out;
328 }
329 if (em->start != offset || em->len != 4091) {
330 test_msg("Unexpected extent wanted start %llu len 1, got start "
331 "%llu len %llu\n", offset, em->start, em->len);
332 goto out;
333 }
334 if (em->flags != 0) {
335 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
336 goto out;
337 }
338 /*
339 * We don't test anything else for inline since it doesn't get set
340 * unless we have a page for it to write into. Maybe we should change
341 * this?
342 */
343 offset = em->start + em->len;
344 free_extent_map(em);
345
346 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
347 if (IS_ERR(em)) {
348 test_msg("Got an error when we shouldn't have\n");
349 goto out;
350 }
351 if (em->block_start != EXTENT_MAP_HOLE) {
352 test_msg("Expected a hole, got %llu\n", em->block_start);
353 goto out;
354 }
355 if (em->start != offset || em->len != 4) {
356 test_msg("Unexpected extent wanted start %llu len 4, got start "
357 "%llu len %llu\n", offset, em->start, em->len);
358 goto out;
359 }
360 if (em->flags != 0) {
361 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
362 goto out;
363 }
364 offset = em->start + em->len;
365 free_extent_map(em);
366
367 /* Regular extent */
368 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
369 if (IS_ERR(em)) {
370 test_msg("Got an error when we shouldn't have\n");
371 goto out;
372 }
373 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
374 test_msg("Expected a real extent, got %llu\n", em->block_start);
375 goto out;
376 }
377 if (em->start != offset || em->len != 4095) {
378 test_msg("Unexpected extent wanted start %llu len 4095, got "
379 "start %llu len %llu\n", offset, em->start, em->len);
380 goto out;
381 }
382 if (em->flags != 0) {
383 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
384 goto out;
385 }
386 if (em->orig_start != em->start) {
387 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
388 em->orig_start);
389 goto out;
390 }
391 offset = em->start + em->len;
392 free_extent_map(em);
393
394 /* The next 3 are split extents */
395 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
396 if (IS_ERR(em)) {
397 test_msg("Got an error when we shouldn't have\n");
398 goto out;
399 }
400 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
401 test_msg("Expected a real extent, got %llu\n", em->block_start);
402 goto out;
403 }
404 if (em->start != offset || em->len != 4096) {
405 test_msg("Unexpected extent wanted start %llu len 4096, got "
406 "start %llu len %llu\n", offset, em->start, em->len);
407 goto out;
408 }
409 if (em->flags != 0) {
410 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
411 goto out;
412 }
413 if (em->orig_start != em->start) {
414 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
415 em->orig_start);
416 goto out;
417 }
418 disk_bytenr = em->block_start;
419 orig_start = em->start;
420 offset = em->start + em->len;
421 free_extent_map(em);
422
423 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
424 if (IS_ERR(em)) {
425 test_msg("Got an error when we shouldn't have\n");
426 goto out;
427 }
428 if (em->block_start != EXTENT_MAP_HOLE) {
429 test_msg("Expected a hole, got %llu\n", em->block_start);
430 goto out;
431 }
432 if (em->start != offset || em->len != 4096) {
433 test_msg("Unexpected extent wanted start %llu len 4096, got "
434 "start %llu len %llu\n", offset, em->start, em->len);
435 goto out;
436 }
437 if (em->flags != 0) {
438 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
439 goto out;
440 }
441 offset = em->start + em->len;
442 free_extent_map(em);
443
444 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
445 if (IS_ERR(em)) {
446 test_msg("Got an error when we shouldn't have\n");
447 goto out;
448 }
449 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
450 test_msg("Expected a real extent, got %llu\n", em->block_start);
451 goto out;
452 }
453 if (em->start != offset || em->len != 8192) {
454 test_msg("Unexpected extent wanted start %llu len 8192, got "
455 "start %llu len %llu\n", offset, em->start, em->len);
456 goto out;
457 }
458 if (em->flags != 0) {
459 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
460 goto out;
461 }
462 if (em->orig_start != orig_start) {
463 test_msg("Wrong orig offset, want %llu, have %llu\n",
464 orig_start, em->orig_start);
465 goto out;
466 }
467 disk_bytenr += (em->start - orig_start);
468 if (em->block_start != disk_bytenr) {
469 test_msg("Wrong block start, want %llu, have %llu\n",
470 disk_bytenr, em->block_start);
471 goto out;
472 }
473 offset = em->start + em->len;
474 free_extent_map(em);
475
476 /* Prealloc extent */
477 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
478 if (IS_ERR(em)) {
479 test_msg("Got an error when we shouldn't have\n");
480 goto out;
481 }
482 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
483 test_msg("Expected a real extent, got %llu\n", em->block_start);
484 goto out;
485 }
486 if (em->start != offset || em->len != 4096) {
487 test_msg("Unexpected extent wanted start %llu len 4096, got "
488 "start %llu len %llu\n", offset, em->start, em->len);
489 goto out;
490 }
491 if (em->flags != prealloc_only) {
492 test_msg("Unexpected flags set, want %lu have %lu\n",
493 prealloc_only, em->flags);
494 goto out;
495 }
496 if (em->orig_start != em->start) {
497 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
498 em->orig_start);
499 goto out;
500 }
501 offset = em->start + em->len;
502 free_extent_map(em);
503
504 /* The next 3 are a half written prealloc extent */
505 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
506 if (IS_ERR(em)) {
507 test_msg("Got an error when we shouldn't have\n");
508 goto out;
509 }
510 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
511 test_msg("Expected a real extent, got %llu\n", em->block_start);
512 goto out;
513 }
514 if (em->start != offset || em->len != 4096) {
515 test_msg("Unexpected extent wanted start %llu len 4096, got "
516 "start %llu len %llu\n", offset, em->start, em->len);
517 goto out;
518 }
519 if (em->flags != prealloc_only) {
520 test_msg("Unexpected flags set, want %lu have %lu\n",
521 prealloc_only, em->flags);
522 goto out;
523 }
524 if (em->orig_start != em->start) {
525 test_msg("Wrong orig offset, want %llu, have %llu\n", 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(inode, NULL, 0, offset, 4096, 0);
535 if (IS_ERR(em)) {
536 test_msg("Got an error when we shouldn't have\n");
537 goto out;
538 }
539 if (em->block_start >= EXTENT_MAP_HOLE) {
540 test_msg("Expected a real extent, got %llu\n", em->block_start);
541 goto out;
542 }
543 if (em->start != offset || em->len != 4096) {
544 test_msg("Unexpected extent wanted start %llu len 4096, got "
545 "start %llu len %llu\n", offset, em->start, em->len);
546 goto out;
547 }
548 if (em->flags != 0) {
549 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
550 goto out;
551 }
552 if (em->orig_start != orig_start) {
553 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
554 orig_start, em->orig_start);
555 goto out;
556 }
557 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
558 test_msg("Unexpected block start, wanted %llu, have %llu\n",
559 disk_bytenr + (em->start - em->orig_start),
560 em->block_start);
561 goto out;
562 }
563 offset = em->start + em->len;
564 free_extent_map(em);
565
566 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
567 if (IS_ERR(em)) {
568 test_msg("Got an error when we shouldn't have\n");
569 goto out;
570 }
571 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
572 test_msg("Expected a real extent, got %llu\n", em->block_start);
573 goto out;
574 }
575 if (em->start != offset || em->len != 8192) {
576 test_msg("Unexpected extent wanted start %llu len 8192, got "
577 "start %llu len %llu\n", offset, em->start, em->len);
578 goto out;
579 }
580 if (em->flags != prealloc_only) {
581 test_msg("Unexpected flags set, want %lu have %lu\n",
582 prealloc_only, em->flags);
583 goto out;
584 }
585 if (em->orig_start != orig_start) {
586 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
587 em->orig_start);
588 goto out;
589 }
590 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
591 test_msg("Unexpected block start, wanted %llu, have %llu\n",
592 disk_bytenr + (em->start - em->orig_start),
593 em->block_start);
594 goto out;
595 }
596 offset = em->start + em->len;
597 free_extent_map(em);
598
599 /* Now for the compressed extent */
600 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
601 if (IS_ERR(em)) {
602 test_msg("Got an error when we shouldn't have\n");
603 goto out;
604 }
605 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
606 test_msg("Expected a real extent, got %llu\n", em->block_start);
607 goto out;
608 }
609 if (em->start != offset || em->len != 8192) {
610 test_msg("Unexpected extent wanted start %llu len 8192, got "
611 "start %llu len %llu\n", offset, em->start, em->len);
612 goto out;
613 }
614 if (em->flags != compressed_only) {
615 test_msg("Unexpected flags set, want %lu have %lu\n",
616 compressed_only, em->flags);
617 goto out;
618 }
619 if (em->orig_start != em->start) {
620 test_msg("Wrong orig offset, want %llu, have %llu\n",
621 em->start, em->orig_start);
622 goto out;
623 }
624 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
625 test_msg("Unexpected compress type, wanted %d, got %d\n",
626 BTRFS_COMPRESS_ZLIB, em->compress_type);
627 goto out;
628 }
629 offset = em->start + em->len;
630 free_extent_map(em);
631
632 /* Split compressed extent */
633 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
634 if (IS_ERR(em)) {
635 test_msg("Got an error when we shouldn't have\n");
636 goto out;
637 }
638 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
639 test_msg("Expected a real extent, got %llu\n", em->block_start);
640 goto out;
641 }
642 if (em->start != offset || em->len != 4096) {
643 test_msg("Unexpected extent wanted start %llu len 4096, got "
644 "start %llu len %llu\n", offset, em->start, em->len);
645 goto out;
646 }
647 if (em->flags != compressed_only) {
648 test_msg("Unexpected flags set, want %lu have %lu\n",
649 compressed_only, em->flags);
650 goto out;
651 }
652 if (em->orig_start != em->start) {
653 test_msg("Wrong orig offset, want %llu, have %llu\n",
654 em->start, em->orig_start);
655 goto out;
656 }
657 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
658 test_msg("Unexpected compress type, wanted %d, got %d\n",
659 BTRFS_COMPRESS_ZLIB, em->compress_type);
660 goto out;
661 }
662 disk_bytenr = em->block_start;
663 orig_start = em->start;
664 offset = em->start + em->len;
665 free_extent_map(em);
666
667 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
668 if (IS_ERR(em)) {
669 test_msg("Got an error when we shouldn't have\n");
670 goto out;
671 }
672 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
673 test_msg("Expected a real extent, got %llu\n", em->block_start);
674 goto out;
675 }
676 if (em->start != offset || em->len != 4096) {
677 test_msg("Unexpected extent wanted start %llu len 4096, got "
678 "start %llu len %llu\n", offset, em->start, em->len);
679 goto out;
680 }
681 if (em->flags != 0) {
682 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
683 goto out;
684 }
685 if (em->orig_start != em->start) {
686 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
687 em->orig_start);
688 goto out;
689 }
690 offset = em->start + em->len;
691 free_extent_map(em);
692
693 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
694 if (IS_ERR(em)) {
695 test_msg("Got an error when we shouldn't have\n");
696 goto out;
697 }
698 if (em->block_start != disk_bytenr) {
699 test_msg("Block start does not match, want %llu got %llu\n",
700 disk_bytenr, em->block_start);
701 goto out;
702 }
703 if (em->start != offset || em->len != 8192) {
704 test_msg("Unexpected extent wanted start %llu len 8192, got "
705 "start %llu len %llu\n", offset, em->start, em->len);
706 goto out;
707 }
708 if (em->flags != compressed_only) {
709 test_msg("Unexpected flags set, want %lu have %lu\n",
710 compressed_only, em->flags);
711 goto out;
712 }
713 if (em->orig_start != orig_start) {
714 test_msg("Wrong orig offset, want %llu, have %llu\n",
715 em->start, orig_start);
716 goto out;
717 }
718 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
719 test_msg("Unexpected compress type, wanted %d, got %d\n",
720 BTRFS_COMPRESS_ZLIB, em->compress_type);
721 goto out;
722 }
723 offset = em->start + em->len;
724 free_extent_map(em);
725
726 /* A hole between regular extents but no hole extent */
727 em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
728 if (IS_ERR(em)) {
729 test_msg("Got an error when we shouldn't have\n");
730 goto out;
731 }
732 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
733 test_msg("Expected a real extent, got %llu\n", em->block_start);
734 goto out;
735 }
736 if (em->start != offset || em->len != 4096) {
737 test_msg("Unexpected extent wanted start %llu len 4096, got "
738 "start %llu len %llu\n", offset, em->start, em->len);
739 goto out;
740 }
741 if (em->flags != 0) {
742 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
743 goto out;
744 }
745 if (em->orig_start != em->start) {
746 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
747 em->orig_start);
748 goto out;
749 }
750 offset = em->start + em->len;
751 free_extent_map(em);
752
753 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
754 if (IS_ERR(em)) {
755 test_msg("Got an error when we shouldn't have\n");
756 goto out;
757 }
758 if (em->block_start != EXTENT_MAP_HOLE) {
759 test_msg("Expected a hole extent, got %llu\n", em->block_start);
760 goto out;
761 }
762 /*
763 * Currently we just return a length that we requested rather than the
764 * length of the actual hole, if this changes we'll have to change this
765 * test.
766 */
767 if (em->start != offset || em->len != 12288) {
768 test_msg("Unexpected extent wanted start %llu len 12288, got "
769 "start %llu len %llu\n", offset, em->start, em->len);
770 goto out;
771 }
772 if (em->flags != vacancy_only) {
773 test_msg("Unexpected flags set, want %lu have %lu\n",
774 vacancy_only, em->flags);
775 goto out;
776 }
777 if (em->orig_start != em->start) {
778 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
779 em->orig_start);
780 goto out;
781 }
782 offset = em->start + em->len;
783 free_extent_map(em);
784
785 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
786 if (IS_ERR(em)) {
787 test_msg("Got an error when we shouldn't have\n");
788 goto out;
789 }
790 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
791 test_msg("Expected a real extent, got %llu\n", em->block_start);
792 goto out;
793 }
794 if (em->start != offset || em->len != 4096) {
795 test_msg("Unexpected extent wanted start %llu len 4096, got "
796 "start %llu len %llu\n", offset, em->start, em->len);
797 goto out;
798 }
799 if (em->flags != 0) {
800 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
801 goto out;
802 }
803 if (em->orig_start != em->start) {
804 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
805 em->orig_start);
806 goto out;
807 }
808 ret = 0;
809out:
810 if (!IS_ERR(em))
811 free_extent_map(em);
812 iput(inode);
faa2dbf0 813 btrfs_free_dummy_root(root);
aaedb55b
JB		 814 return ret;
815}
816
0e30db86
JB		 817static int test_hole_first(void)
818{
819 struct inode *inode = NULL;
820 struct btrfs_root *root = NULL;
821 struct extent_map *em = NULL;
822 int ret = -ENOMEM;
823
824 inode = btrfs_new_test_inode();
825 if (!inode) {
826 test_msg("Couldn't allocate inode\n");
827 return ret;
828 }
829
830 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
831 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
832 BTRFS_I(inode)->location.offset = 0;
833
834 root = btrfs_alloc_dummy_root();
835 if (IS_ERR(root)) {
836 test_msg("Couldn't allocate root\n");
837 goto out;
838 }
839
faa2dbf0 840 root->fs_info = btrfs_alloc_dummy_fs_info();
0e30db86
JB		 841 if (!root->fs_info) {
842 test_msg("Couldn't allocate dummy fs info\n");
843 goto out;
844 }
845
3f556f78 846 root->node = alloc_dummy_extent_buffer(NULL, 4096);
0e30db86
JB		 847 if (!root->node) {
848 test_msg("Couldn't allocate dummy buffer\n");
849 goto out;
850 }
851
852 extent_buffer_get(root->node);
853 btrfs_set_header_nritems(root->node, 0);
854 btrfs_set_header_level(root->node, 0);
855 BTRFS_I(inode)->root = root;
856 ret = -EINVAL;
857
858 /*
859 * Need a blank inode item here just so we don't confuse
860 * btrfs_get_extent.
861 */
862 insert_inode_item_key(root);
863 insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
864 BTRFS_FILE_EXTENT_REG, 0, 1);
865 em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
866 if (IS_ERR(em)) {
867 test_msg("Got an error when we shouldn't have\n");
868 goto out;
869 }
870 if (em->block_start != EXTENT_MAP_HOLE) {
871 test_msg("Expected a hole, got %llu\n", em->block_start);
872 goto out;
873 }
874 if (em->start != 0 || em->len != 4096) {
875 test_msg("Unexpected extent wanted start 0 len 4096, got start "
876 "%llu len %llu\n", em->start, em->len);
877 goto out;
878 }
879 if (em->flags != vacancy_only) {
880 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
881 em->flags);
882 goto out;
883 }
884 free_extent_map(em);
885
886 em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
887 if (IS_ERR(em)) {
888 test_msg("Got an error when we shouldn't have\n");
889 goto out;
890 }
891 if (em->block_start != 4096) {
892 test_msg("Expected a real extent, got %llu\n", em->block_start);
893 goto out;
894 }
895 if (em->start != 4096 || em->len != 4096) {
896 test_msg("Unexpected extent wanted start 4096 len 4096, got "
897 "start %llu len %llu\n", em->start, em->len);
898 goto out;
899 }
900 if (em->flags != 0) {
901 test_msg("Unexpected flags set, wanted 0 got %lu\n",
902 em->flags);
903 goto out;
904 }
905 ret = 0;
906out:
907 if (!IS_ERR(em))
908 free_extent_map(em);
909 iput(inode);
faa2dbf0 910 btrfs_free_dummy_root(root);
0e30db86
JB		 911 return ret;
912}
913
6a3891c5
JB		 914static int test_extent_accounting(void)
915{
916 struct inode *inode = NULL;
917 struct btrfs_root *root = NULL;
918 int ret = -ENOMEM;
919
920 inode = btrfs_new_test_inode();
921 if (!inode) {
922 test_msg("Couldn't allocate inode\n");
923 return ret;
924 }
925
926 root = btrfs_alloc_dummy_root();
927 if (IS_ERR(root)) {
928 test_msg("Couldn't allocate root\n");
929 goto out;
930 }
931
932 root->fs_info = btrfs_alloc_dummy_fs_info();
933 if (!root->fs_info) {
934 test_msg("Couldn't allocate dummy fs info\n");
935 goto out;
936 }
937
938 BTRFS_I(inode)->root = root;
939 btrfs_test_inode_set_ops(inode);
940
941 /* [BTRFS_MAX_EXTENT_SIZE] */
942 BTRFS_I(inode)->outstanding_extents++;
943 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
944 NULL);
945 if (ret) {
946 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
947 goto out;
948 }
949 if (BTRFS_I(inode)->outstanding_extents != 1) {
950 ret = -EINVAL;
951 test_msg("Miscount, wanted 1, got %u\n",
952 BTRFS_I(inode)->outstanding_extents);
953 goto out;
954 }
955
956 /* [BTRFS_MAX_EXTENT_SIZE][4k] */
957 BTRFS_I(inode)->outstanding_extents++;
958 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
959 BTRFS_MAX_EXTENT_SIZE + 4095, NULL);
960 if (ret) {
961 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
962 goto out;
963 }
964 if (BTRFS_I(inode)->outstanding_extents != 2) {
965 ret = -EINVAL;
966 test_msg("Miscount, wanted 2, got %u\n",
967 BTRFS_I(inode)->outstanding_extents);
968 goto out;
969 }
970
971 /* [BTRFS_MAX_EXTENT_SIZE/2][4K HOLE][the rest] */
972 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
973 BTRFS_MAX_EXTENT_SIZE >> 1,
974 (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
975 EXTENT_DELALLOC | EXTENT_DIRTY |
976 EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
977 NULL, GFP_NOFS);
978 if (ret) {
979 test_msg("clear_extent_bit returned %d\n", ret);
980 goto out;
981 }
982 if (BTRFS_I(inode)->outstanding_extents != 2) {
983 ret = -EINVAL;
984 test_msg("Miscount, wanted 2, got %u\n",
985 BTRFS_I(inode)->outstanding_extents);
986 goto out;
987 }
988
989 /* [BTRFS_MAX_EXTENT_SIZE][4K] */
990 BTRFS_I(inode)->outstanding_extents++;
991 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
992 (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
993 NULL);
994 if (ret) {
995 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
996 goto out;
997 }
998 if (BTRFS_I(inode)->outstanding_extents != 2) {
999 ret = -EINVAL;
1000 test_msg("Miscount, wanted 2, got %u\n",
1001 BTRFS_I(inode)->outstanding_extents);
1002 goto out;
1003 }
1004
1005 /*
1006 * [BTRFS_MAX_EXTENT_SIZE+4K][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4K]
1007 *
1008 * I'm artificially adding 2 to outstanding_extents because in the
1009 * buffered IO case we'd add things up as we go, but I don't feel like
1010 * doing that here, this isn't the interesting case we want to test.
1011 */
1012 BTRFS_I(inode)->outstanding_extents += 2;
1013 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE + 8192,
1014 (BTRFS_MAX_EXTENT_SIZE << 1) + 12287,
1015 NULL);
1016 if (ret) {
1017 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1018 goto out;
1019 }
1020 if (BTRFS_I(inode)->outstanding_extents != 4) {
1021 ret = -EINVAL;
1022 test_msg("Miscount, wanted 4, got %u\n",
1023 BTRFS_I(inode)->outstanding_extents);
1024 goto out;
1025 }
1026
1027 /* [BTRFS_MAX_EXTENT_SIZE+4k][4k][BTRFS_MAX_EXTENT_SIZE+4k] */
1028 BTRFS_I(inode)->outstanding_extents++;
1029 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
1030 BTRFS_MAX_EXTENT_SIZE+8191, NULL);
1031 if (ret) {
1032 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1033 goto out;
1034 }
1035 if (BTRFS_I(inode)->outstanding_extents != 3) {
1036 ret = -EINVAL;
1037 test_msg("Miscount, wanted 3, got %u\n",
1038 BTRFS_I(inode)->outstanding_extents);
1039 goto out;
1040 }
1041
1042 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1043 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1044 BTRFS_MAX_EXTENT_SIZE+4096,
1045 BTRFS_MAX_EXTENT_SIZE+8191,
1046 EXTENT_DIRTY | EXTENT_DELALLOC |
1047 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1048 NULL, GFP_NOFS);
1049 if (ret) {
1050 test_msg("clear_extent_bit returned %d\n", ret);
1051 goto out;
1052 }
1053 if (BTRFS_I(inode)->outstanding_extents != 4) {
1054 ret = -EINVAL;
1055 test_msg("Miscount, wanted 4, got %u\n",
1056 BTRFS_I(inode)->outstanding_extents);
1057 goto out;
1058 }
1059
1060 /*
1061 * Refill the hole again just for good measure, because I thought it
1062 * might fail and I'd rather satisfy my paranoia at this point.
1063 */
1064 BTRFS_I(inode)->outstanding_extents++;
1065 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
1066 BTRFS_MAX_EXTENT_SIZE+8191, NULL);
1067 if (ret) {
1068 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1069 goto out;
1070 }
1071 if (BTRFS_I(inode)->outstanding_extents != 3) {
1072 ret = -EINVAL;
1073 test_msg("Miscount, wanted 3, got %u\n",
1074 BTRFS_I(inode)->outstanding_extents);
1075 goto out;
1076 }
1077
1078 /* Empty */
1079 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1080 EXTENT_DIRTY | EXTENT_DELALLOC |
1081 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1082 NULL, GFP_NOFS);
1083 if (ret) {
1084 test_msg("clear_extent_bit returned %d\n", ret);
1085 goto out;
1086 }
1087 if (BTRFS_I(inode)->outstanding_extents) {
1088 ret = -EINVAL;
1089 test_msg("Miscount, wanted 0, got %u\n",
1090 BTRFS_I(inode)->outstanding_extents);
1091 goto out;
1092 }
1093 ret = 0;
1094out:
1095 if (ret)
1096 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1097 EXTENT_DIRTY | EXTENT_DELALLOC |
1098 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1099 NULL, GFP_NOFS);
1100 iput(inode);
1101 btrfs_free_dummy_root(root);
1102 return ret;
1103}
1104
aaedb55b
JB		 1105int btrfs_test_inodes(void)
1106{
0e30db86
JB		 1107 int ret;
1108
1109 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1110 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
1111 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1112
aaedb55b 1113 test_msg("Running btrfs_get_extent tests\n");
0e30db86
JB		 1114 ret = test_btrfs_get_extent();
1115 if (ret)
1116 return ret;
1117 test_msg("Running hole first btrfs_get_extent test\n");
6a3891c5
JB		 1118 ret = test_hole_first();
1119 if (ret)
1120 return ret;
1121 test_msg("Running outstanding_extents tests\n");
1122 return test_extent_accounting();
aaedb55b 1123}
Ubuntu Artful kernel mirror