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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#include "../compression.h"
26
27static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
28 u64 ram_bytes, u64 offset, u64 disk_bytenr,
29 u64 disk_len, u32 type, u8 compression, int slot)
30{
31 struct btrfs_path path;
32 struct btrfs_file_extent_item *fi;
33 struct extent_buffer *leaf = root->node;
34 struct btrfs_key key;
35 u32 value_len = sizeof(struct btrfs_file_extent_item);
36
37 if (type == BTRFS_FILE_EXTENT_INLINE)
38 value_len += len;
39 memset(&path, 0, sizeof(path));
40
41 path.nodes[0] = leaf;
42 path.slots[0] = slot;
43
44 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
45 key.type = BTRFS_EXTENT_DATA_KEY;
46 key.offset = start;
47
48 setup_items_for_insert(root, &path, &key, &value_len, value_len,
49 value_len + sizeof(struct btrfs_item), 1);
50 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
51 btrfs_set_file_extent_generation(leaf, fi, 1);
52 btrfs_set_file_extent_type(leaf, fi, type);
53 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
54 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
55 btrfs_set_file_extent_offset(leaf, fi, offset);
56 btrfs_set_file_extent_num_bytes(leaf, fi, len);
57 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
58 btrfs_set_file_extent_compression(leaf, fi, compression);
59 btrfs_set_file_extent_encryption(leaf, fi, 0);
60 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
61}
62
63static void insert_inode_item_key(struct btrfs_root *root)
64{
65 struct btrfs_path path;
66 struct extent_buffer *leaf = root->node;
67 struct btrfs_key key;
68 u32 value_len = 0;
69
70 memset(&path, 0, sizeof(path));
71
72 path.nodes[0] = leaf;
73 path.slots[0] = 0;
74
75 key.objectid = BTRFS_INODE_ITEM_KEY;
76 key.type = BTRFS_INODE_ITEM_KEY;
77 key.offset = 0;
78
79 setup_items_for_insert(root, &path, &key, &value_len, value_len,
80 value_len + sizeof(struct btrfs_item), 1);
81}
82
83/*
84 * Build the most complicated map of extents the earth has ever seen. We want
85 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
86 * diagram of how the extents will look though this may not be possible we still
87 * want to make sure everything acts normally (the last number is not inclusive)
88 *
89 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
90 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
91 *
92 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
93 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
94 *
95 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
96 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
97 *
98 * [81920-86016]
99 * [ regular ]
100 */
101static void setup_file_extents(struct btrfs_root *root)
102{
103 int slot = 0;
104 u64 disk_bytenr = SZ_1M;
105 u64 offset = 0;
106
107 /* First we want a hole */
108 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
109 slot);
110 slot++;
111 offset += 5;
112
113 /*
114 * Now we want an inline extent, I don't think this is possible but hey
115 * why not? Also keep in mind if we have an inline extent it counts as
116 * the whole first page. If we were to expand it we would have to cow
117 * and we wouldn't have an inline extent anymore.
118 */
119 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
120 slot);
121 slot++;
122 offset = 4096;
123
124 /* Now another hole */
125 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
126 slot);
127 slot++;
128 offset += 4;
129
130 /* Now for a regular extent */
131 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
132 BTRFS_FILE_EXTENT_REG, 0, slot);
133 slot++;
134 disk_bytenr += 4096;
135 offset += 4095;
136
137 /*
138 * Now for 3 extents that were split from a hole punch so we test
139 * offsets properly.
140 */
141 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
142 BTRFS_FILE_EXTENT_REG, 0, slot);
143 slot++;
144 offset += 4096;
145 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
146 0, slot);
147 slot++;
148 offset += 4096;
149 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
150 BTRFS_FILE_EXTENT_REG, 0, slot);
151 slot++;
152 offset += 8192;
153 disk_bytenr += 16384;
154
155 /* Now for a unwritten prealloc extent */
156 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
157 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
158 slot++;
159 offset += 4096;
160
161 /*
162 * We want to jack up disk_bytenr a little more so the em stuff doesn't
163 * merge our records.
164 */
165 disk_bytenr += 8192;
166
167 /*
168 * Now for a partially written prealloc extent, basically the same as
169 * the hole punch example above. Ram_bytes never changes when you mark
170 * extents written btw.
171 */
172 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
173 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
174 slot++;
175 offset += 4096;
176 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
177 BTRFS_FILE_EXTENT_REG, 0, slot);
178 slot++;
179 offset += 4096;
180 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
181 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
182 slot++;
183 offset += 8192;
184 disk_bytenr += 16384;
185
186 /* Now a normal compressed extent */
187 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
188 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
189 slot++;
190 offset += 8192;
191 /* No merges */
192 disk_bytenr += 8192;
193
194 /* Now a split compressed extent */
195 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
196 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
197 slot++;
198 offset += 4096;
199 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
200 BTRFS_FILE_EXTENT_REG, 0, slot);
201 slot++;
202 offset += 4096;
203 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
204 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
205 slot++;
206 offset += 8192;
207 disk_bytenr += 8192;
208
209 /* Now extents that have a hole but no hole extent */
210 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
211 BTRFS_FILE_EXTENT_REG, 0, slot);
212 slot++;
213 offset += 16384;
214 disk_bytenr += 4096;
215 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
216 BTRFS_FILE_EXTENT_REG, 0, slot);
217}
218
219static unsigned long prealloc_only = 0;
220static unsigned long compressed_only = 0;
221static unsigned long vacancy_only = 0;
222
223static noinline int test_btrfs_get_extent(void)
224{
225 struct inode *inode = NULL;
226 struct btrfs_root *root = NULL;
227 struct extent_map *em = NULL;
228 u64 orig_start;
229 u64 disk_bytenr;
230 u64 offset;
231 int ret = -ENOMEM;
232
233 inode = btrfs_new_test_inode();
234 if (!inode) {
235 test_msg("Couldn't allocate inode\n");
236 return ret;
237 }
238
239 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
240 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
241 BTRFS_I(inode)->location.offset = 0;
242
243 root = btrfs_alloc_dummy_root();
244 if (IS_ERR(root)) {
245 test_msg("Couldn't allocate root\n");
246 goto out;
247 }
248
249 /*
250 * We do this since btrfs_get_extent wants to assign em->bdev to
251 * root->fs_info->fs_devices->latest_bdev.
252 */
253 root->fs_info = btrfs_alloc_dummy_fs_info();
254 if (!root->fs_info) {
255 test_msg("Couldn't allocate dummy fs info\n");
256 goto out;
257 }
258
259 root->node = alloc_dummy_extent_buffer(NULL, 4096);
260 if (!root->node) {
261 test_msg("Couldn't allocate dummy buffer\n");
262 goto out;
263 }
264
265 /*
266 * We will just free a dummy node if it's ref count is 2 so we need an
267 * extra ref so our searches don't accidently release our page.
268 */
269 extent_buffer_get(root->node);
270 btrfs_set_header_nritems(root->node, 0);
271 btrfs_set_header_level(root->node, 0);
272 ret = -EINVAL;
273
274 /* First with no extents */
275 BTRFS_I(inode)->root = root;
276 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
277 if (IS_ERR(em)) {
278 em = NULL;
279 test_msg("Got an error when we shouldn't have\n");
280 goto out;
281 }
282 if (em->block_start != EXTENT_MAP_HOLE) {
283 test_msg("Expected a hole, got %llu\n", em->block_start);
284 goto out;
285 }
286 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
287 test_msg("Vacancy flag wasn't set properly\n");
288 goto out;
289 }
290 free_extent_map(em);
291 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
292
293 /*
294 * All of the magic numbers are based on the mapping setup in
295 * setup_file_extents, so if you change anything there you need to
296 * update the comment and update the expected values below.
297 */
298 setup_file_extents(root);
299
300 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
301 if (IS_ERR(em)) {
302 test_msg("Got an error when we shouldn't have\n");
303 goto out;
304 }
305 if (em->block_start != EXTENT_MAP_HOLE) {
306 test_msg("Expected a hole, got %llu\n", em->block_start);
307 goto out;
308 }
309 if (em->start != 0 || em->len != 5) {
310 test_msg("Unexpected extent wanted start 0 len 5, got start "
311 "%llu len %llu\n", em->start, em->len);
312 goto out;
313 }
314 if (em->flags != 0) {
315 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
316 goto out;
317 }
318 offset = em->start + em->len;
319 free_extent_map(em);
320
321 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
322 if (IS_ERR(em)) {
323 test_msg("Got an error when we shouldn't have\n");
324 goto out;
325 }
326 if (em->block_start != EXTENT_MAP_INLINE) {
327 test_msg("Expected an inline, got %llu\n", em->block_start);
328 goto out;
329 }
330 if (em->start != offset || em->len != 4091) {
331 test_msg("Unexpected extent wanted start %llu len 1, got start "
332 "%llu len %llu\n", offset, em->start, em->len);
333 goto out;
334 }
335 if (em->flags != 0) {
336 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
337 goto out;
338 }
339 /*
340 * We don't test anything else for inline since it doesn't get set
341 * unless we have a page for it to write into. Maybe we should change
342 * this?
343 */
344 offset = em->start + em->len;
345 free_extent_map(em);
346
347 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
348 if (IS_ERR(em)) {
349 test_msg("Got an error when we shouldn't have\n");
350 goto out;
351 }
352 if (em->block_start != EXTENT_MAP_HOLE) {
353 test_msg("Expected a hole, got %llu\n", em->block_start);
354 goto out;
355 }
356 if (em->start != offset || em->len != 4) {
357 test_msg("Unexpected extent wanted start %llu len 4, got start "
358 "%llu len %llu\n", offset, em->start, em->len);
359 goto out;
360 }
361 if (em->flags != 0) {
362 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
363 goto out;
364 }
365 offset = em->start + em->len;
366 free_extent_map(em);
367
368 /* Regular extent */
369 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
370 if (IS_ERR(em)) {
371 test_msg("Got an error when we shouldn't have\n");
372 goto out;
373 }
374 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
375 test_msg("Expected a real extent, got %llu\n", em->block_start);
376 goto out;
377 }
378 if (em->start != offset || em->len != 4095) {
379 test_msg("Unexpected extent wanted start %llu len 4095, got "
380 "start %llu len %llu\n", offset, em->start, em->len);
381 goto out;
382 }
383 if (em->flags != 0) {
384 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
385 goto out;
386 }
387 if (em->orig_start != em->start) {
388 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
389 em->orig_start);
390 goto out;
391 }
392 offset = em->start + em->len;
393 free_extent_map(em);
394
395 /* The next 3 are split extents */
396 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
397 if (IS_ERR(em)) {
398 test_msg("Got an error when we shouldn't have\n");
399 goto out;
400 }
401 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
402 test_msg("Expected a real extent, got %llu\n", em->block_start);
403 goto out;
404 }
405 if (em->start != offset || em->len != 4096) {
406 test_msg("Unexpected extent wanted start %llu len 4096, got "
407 "start %llu len %llu\n", offset, em->start, em->len);
408 goto out;
409 }
410 if (em->flags != 0) {
411 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
412 goto out;
413 }
414 if (em->orig_start != em->start) {
415 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
416 em->orig_start);
417 goto out;
418 }
419 disk_bytenr = em->block_start;
420 orig_start = em->start;
421 offset = em->start + em->len;
422 free_extent_map(em);
423
424 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
425 if (IS_ERR(em)) {
426 test_msg("Got an error when we shouldn't have\n");
427 goto out;
428 }
429 if (em->block_start != EXTENT_MAP_HOLE) {
430 test_msg("Expected a hole, got %llu\n", em->block_start);
431 goto out;
432 }
433 if (em->start != offset || em->len != 4096) {
434 test_msg("Unexpected extent wanted start %llu len 4096, got "
435 "start %llu len %llu\n", offset, em->start, em->len);
436 goto out;
437 }
438 if (em->flags != 0) {
439 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
440 goto out;
441 }
442 offset = em->start + em->len;
443 free_extent_map(em);
444
445 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
446 if (IS_ERR(em)) {
447 test_msg("Got an error when we shouldn't have\n");
448 goto out;
449 }
450 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
451 test_msg("Expected a real extent, got %llu\n", em->block_start);
452 goto out;
453 }
454 if (em->start != offset || em->len != 8192) {
455 test_msg("Unexpected extent wanted start %llu len 8192, got "
456 "start %llu len %llu\n", offset, em->start, em->len);
457 goto out;
458 }
459 if (em->flags != 0) {
460 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
461 goto out;
462 }
463 if (em->orig_start != orig_start) {
464 test_msg("Wrong orig offset, want %llu, have %llu\n",
465 orig_start, em->orig_start);
466 goto out;
467 }
468 disk_bytenr += (em->start - orig_start);
469 if (em->block_start != disk_bytenr) {
470 test_msg("Wrong block start, want %llu, have %llu\n",
471 disk_bytenr, em->block_start);
472 goto out;
473 }
474 offset = em->start + em->len;
475 free_extent_map(em);
476
477 /* Prealloc extent */
478 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
479 if (IS_ERR(em)) {
480 test_msg("Got an error when we shouldn't have\n");
481 goto out;
482 }
483 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
484 test_msg("Expected a real extent, got %llu\n", em->block_start);
485 goto out;
486 }
487 if (em->start != offset || em->len != 4096) {
488 test_msg("Unexpected extent wanted start %llu len 4096, got "
489 "start %llu len %llu\n", offset, em->start, em->len);
490 goto out;
491 }
492 if (em->flags != prealloc_only) {
493 test_msg("Unexpected flags set, want %lu have %lu\n",
494 prealloc_only, em->flags);
495 goto out;
496 }
497 if (em->orig_start != em->start) {
498 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
499 em->orig_start);
500 goto out;
501 }
502 offset = em->start + em->len;
503 free_extent_map(em);
504
505 /* The next 3 are a half written prealloc extent */
506 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
507 if (IS_ERR(em)) {
508 test_msg("Got an error when we shouldn't have\n");
509 goto out;
510 }
511 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
512 test_msg("Expected a real extent, got %llu\n", em->block_start);
513 goto out;
514 }
515 if (em->start != offset || em->len != 4096) {
516 test_msg("Unexpected extent wanted start %llu len 4096, got "
517 "start %llu len %llu\n", offset, em->start, em->len);
518 goto out;
519 }
520 if (em->flags != prealloc_only) {
521 test_msg("Unexpected flags set, want %lu have %lu\n",
522 prealloc_only, em->flags);
523 goto out;
524 }
525 if (em->orig_start != em->start) {
526 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
527 em->orig_start);
528 goto out;
529 }
530 disk_bytenr = em->block_start;
531 orig_start = em->start;
532 offset = em->start + em->len;
533 free_extent_map(em);
534
535 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
536 if (IS_ERR(em)) {
537 test_msg("Got an error when we shouldn't have\n");
538 goto out;
539 }
540 if (em->block_start >= EXTENT_MAP_HOLE) {
541 test_msg("Expected a real extent, got %llu\n", em->block_start);
542 goto out;
543 }
544 if (em->start != offset || em->len != 4096) {
545 test_msg("Unexpected extent wanted start %llu len 4096, got "
546 "start %llu len %llu\n", offset, em->start, em->len);
547 goto out;
548 }
549 if (em->flags != 0) {
550 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
551 goto out;
552 }
553 if (em->orig_start != orig_start) {
554 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
555 orig_start, em->orig_start);
556 goto out;
557 }
558 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
559 test_msg("Unexpected block start, wanted %llu, have %llu\n",
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(inode, NULL, 0, offset, 4096, 0);
568 if (IS_ERR(em)) {
569 test_msg("Got an error when we shouldn't have\n");
570 goto out;
571 }
572 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
573 test_msg("Expected a real extent, got %llu\n", em->block_start);
574 goto out;
575 }
576 if (em->start != offset || em->len != 8192) {
577 test_msg("Unexpected extent wanted start %llu len 8192, got "
578 "start %llu len %llu\n", offset, em->start, em->len);
579 goto out;
580 }
581 if (em->flags != prealloc_only) {
582 test_msg("Unexpected flags set, want %lu have %lu\n",
583 prealloc_only, em->flags);
584 goto out;
585 }
586 if (em->orig_start != orig_start) {
587 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
588 em->orig_start);
589 goto out;
590 }
591 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
592 test_msg("Unexpected block start, wanted %llu, have %llu\n",
593 disk_bytenr + (em->start - em->orig_start),
594 em->block_start);
595 goto out;
596 }
597 offset = em->start + em->len;
598 free_extent_map(em);
599
600 /* Now for the compressed extent */
601 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
602 if (IS_ERR(em)) {
603 test_msg("Got an error when we shouldn't have\n");
604 goto out;
605 }
606 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
607 test_msg("Expected a real extent, got %llu\n", em->block_start);
608 goto out;
609 }
610 if (em->start != offset || em->len != 8192) {
611 test_msg("Unexpected extent wanted start %llu len 8192, got "
612 "start %llu len %llu\n", offset, em->start, em->len);
613 goto out;
614 }
615 if (em->flags != compressed_only) {
616 test_msg("Unexpected flags set, want %lu have %lu\n",
617 compressed_only, em->flags);
618 goto out;
619 }
620 if (em->orig_start != em->start) {
621 test_msg("Wrong orig offset, want %llu, have %llu\n",
622 em->start, em->orig_start);
623 goto out;
624 }
625 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
626 test_msg("Unexpected compress type, wanted %d, got %d\n",
627 BTRFS_COMPRESS_ZLIB, em->compress_type);
628 goto out;
629 }
630 offset = em->start + em->len;
631 free_extent_map(em);
632
633 /* Split compressed extent */
634 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
635 if (IS_ERR(em)) {
636 test_msg("Got an error when we shouldn't have\n");
637 goto out;
638 }
639 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
640 test_msg("Expected a real extent, got %llu\n", em->block_start);
641 goto out;
642 }
643 if (em->start != offset || em->len != 4096) {
644 test_msg("Unexpected extent wanted start %llu len 4096, got "
645 "start %llu len %llu\n", offset, em->start, em->len);
646 goto out;
647 }
648 if (em->flags != compressed_only) {
649 test_msg("Unexpected flags set, want %lu have %lu\n",
650 compressed_only, em->flags);
651 goto out;
652 }
653 if (em->orig_start != em->start) {
654 test_msg("Wrong orig offset, want %llu, have %llu\n",
655 em->start, em->orig_start);
656 goto out;
657 }
658 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
659 test_msg("Unexpected compress type, wanted %d, got %d\n",
660 BTRFS_COMPRESS_ZLIB, em->compress_type);
661 goto out;
662 }
663 disk_bytenr = em->block_start;
664 orig_start = em->start;
665 offset = em->start + em->len;
666 free_extent_map(em);
667
668 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
669 if (IS_ERR(em)) {
670 test_msg("Got an error when we shouldn't have\n");
671 goto out;
672 }
673 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
674 test_msg("Expected a real extent, got %llu\n", em->block_start);
675 goto out;
676 }
677 if (em->start != offset || em->len != 4096) {
678 test_msg("Unexpected extent wanted start %llu len 4096, got "
679 "start %llu len %llu\n", offset, em->start, em->len);
680 goto out;
681 }
682 if (em->flags != 0) {
683 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
684 goto out;
685 }
686 if (em->orig_start != em->start) {
687 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
688 em->orig_start);
689 goto out;
690 }
691 offset = em->start + em->len;
692 free_extent_map(em);
693
694 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
695 if (IS_ERR(em)) {
696 test_msg("Got an error when we shouldn't have\n");
697 goto out;
698 }
699 if (em->block_start != disk_bytenr) {
700 test_msg("Block start does not match, want %llu got %llu\n",
701 disk_bytenr, em->block_start);
702 goto out;
703 }
704 if (em->start != offset || em->len != 8192) {
705 test_msg("Unexpected extent wanted start %llu len 8192, got "
706 "start %llu len %llu\n", offset, em->start, em->len);
707 goto out;
708 }
709 if (em->flags != compressed_only) {
710 test_msg("Unexpected flags set, want %lu have %lu\n",
711 compressed_only, em->flags);
712 goto out;
713 }
714 if (em->orig_start != orig_start) {
715 test_msg("Wrong orig offset, want %llu, have %llu\n",
716 em->start, orig_start);
717 goto out;
718 }
719 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
720 test_msg("Unexpected compress type, wanted %d, got %d\n",
721 BTRFS_COMPRESS_ZLIB, em->compress_type);
722 goto out;
723 }
724 offset = em->start + em->len;
725 free_extent_map(em);
726
727 /* A hole between regular extents but no hole extent */
728 em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
729 if (IS_ERR(em)) {
730 test_msg("Got an error when we shouldn't have\n");
731 goto out;
732 }
733 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
734 test_msg("Expected a real extent, got %llu\n", em->block_start);
735 goto out;
736 }
737 if (em->start != offset || em->len != 4096) {
738 test_msg("Unexpected extent wanted start %llu len 4096, got "
739 "start %llu len %llu\n", offset, em->start, em->len);
740 goto out;
741 }
742 if (em->flags != 0) {
743 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
744 goto out;
745 }
746 if (em->orig_start != em->start) {
747 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
748 em->orig_start);
749 goto out;
750 }
751 offset = em->start + em->len;
752 free_extent_map(em);
753
754 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
755 if (IS_ERR(em)) {
756 test_msg("Got an error when we shouldn't have\n");
757 goto out;
758 }
759 if (em->block_start != EXTENT_MAP_HOLE) {
760 test_msg("Expected a hole extent, got %llu\n", em->block_start);
761 goto out;
762 }
763 /*
764 * Currently we just return a length that we requested rather than the
765 * length of the actual hole, if this changes we'll have to change this
766 * test.
767 */
768 if (em->start != offset || em->len != 12288) {
769 test_msg("Unexpected extent wanted start %llu len 12288, got "
770 "start %llu len %llu\n", offset, em->start, em->len);
771 goto out;
772 }
773 if (em->flags != vacancy_only) {
774 test_msg("Unexpected flags set, want %lu have %lu\n",
775 vacancy_only, em->flags);
776 goto out;
777 }
778 if (em->orig_start != em->start) {
779 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
780 em->orig_start);
781 goto out;
782 }
783 offset = em->start + em->len;
784 free_extent_map(em);
785
786 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
787 if (IS_ERR(em)) {
788 test_msg("Got an error when we shouldn't have\n");
789 goto out;
790 }
791 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
792 test_msg("Expected a real extent, got %llu\n", em->block_start);
793 goto out;
794 }
795 if (em->start != offset || em->len != 4096) {
796 test_msg("Unexpected extent wanted start %llu len 4096, got "
797 "start %llu len %llu\n", offset, em->start, em->len);
798 goto out;
799 }
800 if (em->flags != 0) {
801 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
802 goto out;
803 }
804 if (em->orig_start != em->start) {
805 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
806 em->orig_start);
807 goto out;
808 }
809 ret = 0;
810out:
811 if (!IS_ERR(em))
812 free_extent_map(em);
813 iput(inode);
814 btrfs_free_dummy_root(root);
815 return ret;
816}
817
818static int test_hole_first(void)
819{
820 struct inode *inode = NULL;
821 struct btrfs_root *root = NULL;
822 struct extent_map *em = NULL;
823 int ret = -ENOMEM;
824
825 inode = btrfs_new_test_inode();
826 if (!inode) {
827 test_msg("Couldn't allocate inode\n");
828 return ret;
829 }
830
831 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
832 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
833 BTRFS_I(inode)->location.offset = 0;
834
835 root = btrfs_alloc_dummy_root();
836 if (IS_ERR(root)) {
837 test_msg("Couldn't allocate root\n");
838 goto out;
839 }
840
841 root->fs_info = btrfs_alloc_dummy_fs_info();
842 if (!root->fs_info) {
843 test_msg("Couldn't allocate dummy fs info\n");
844 goto out;
845 }
846
847 root->node = alloc_dummy_extent_buffer(NULL, 4096);
848 if (!root->node) {
849 test_msg("Couldn't allocate dummy buffer\n");
850 goto out;
851 }
852
853 extent_buffer_get(root->node);
854 btrfs_set_header_nritems(root->node, 0);
855 btrfs_set_header_level(root->node, 0);
856 BTRFS_I(inode)->root = root;
857 ret = -EINVAL;
858
859 /*
860 * Need a blank inode item here just so we don't confuse
861 * btrfs_get_extent.
862 */
863 insert_inode_item_key(root);
864 insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
865 BTRFS_FILE_EXTENT_REG, 0, 1);
866 em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
867 if (IS_ERR(em)) {
868 test_msg("Got an error when we shouldn't have\n");
869 goto out;
870 }
871 if (em->block_start != EXTENT_MAP_HOLE) {
872 test_msg("Expected a hole, got %llu\n", em->block_start);
873 goto out;
874 }
875 if (em->start != 0 || em->len != 4096) {
876 test_msg("Unexpected extent wanted start 0 len 4096, got start "
877 "%llu len %llu\n", em->start, em->len);
878 goto out;
879 }
880 if (em->flags != vacancy_only) {
881 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
882 em->flags);
883 goto out;
884 }
885 free_extent_map(em);
886
887 em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
888 if (IS_ERR(em)) {
889 test_msg("Got an error when we shouldn't have\n");
890 goto out;
891 }
892 if (em->block_start != 4096) {
893 test_msg("Expected a real extent, got %llu\n", em->block_start);
894 goto out;
895 }
896 if (em->start != 4096 || em->len != 4096) {
897 test_msg("Unexpected extent wanted start 4096 len 4096, got "
898 "start %llu len %llu\n", em->start, em->len);
899 goto out;
900 }
901 if (em->flags != 0) {
902 test_msg("Unexpected flags set, wanted 0 got %lu\n",
903 em->flags);
904 goto out;
905 }
906 ret = 0;
907out:
908 if (!IS_ERR(em))
909 free_extent_map(em);
910 iput(inode);
911 btrfs_free_dummy_root(root);
912 return ret;
913}
914
915static int test_extent_accounting(void)
916{
917 struct inode *inode = NULL;
918 struct btrfs_root *root = NULL;
919 int ret = -ENOMEM;
920
921 inode = btrfs_new_test_inode();
922 if (!inode) {
923 test_msg("Couldn't allocate inode\n");
924 return ret;
925 }
926
927 root = btrfs_alloc_dummy_root();
928 if (IS_ERR(root)) {
929 test_msg("Couldn't allocate root\n");
930 goto out;
931 }
932
933 root->fs_info = btrfs_alloc_dummy_fs_info();
934 if (!root->fs_info) {
935 test_msg("Couldn't allocate dummy fs info\n");
936 goto out;
937 }
938
939 BTRFS_I(inode)->root = root;
940 btrfs_test_inode_set_ops(inode);
941
942 /* [BTRFS_MAX_EXTENT_SIZE] */
943 BTRFS_I(inode)->outstanding_extents++;
944 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
945 NULL);
946 if (ret) {
947 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
948 goto out;
949 }
950 if (BTRFS_I(inode)->outstanding_extents != 1) {
951 ret = -EINVAL;
952 test_msg("Miscount, wanted 1, got %u\n",
953 BTRFS_I(inode)->outstanding_extents);
954 goto out;
955 }
956
957 /* [BTRFS_MAX_EXTENT_SIZE][4k] */
958 BTRFS_I(inode)->outstanding_extents++;
959 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
960 BTRFS_MAX_EXTENT_SIZE + 4095, NULL);
961 if (ret) {
962 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
963 goto out;
964 }
965 if (BTRFS_I(inode)->outstanding_extents != 2) {
966 ret = -EINVAL;
967 test_msg("Miscount, wanted 2, got %u\n",
968 BTRFS_I(inode)->outstanding_extents);
969 goto out;
970 }
971
972 /* [BTRFS_MAX_EXTENT_SIZE/2][4K HOLE][the rest] */
973 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
974 BTRFS_MAX_EXTENT_SIZE >> 1,
975 (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
976 EXTENT_DELALLOC | EXTENT_DIRTY |
977 EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
978 NULL, GFP_KERNEL);
979 if (ret) {
980 test_msg("clear_extent_bit returned %d\n", ret);
981 goto out;
982 }
983 if (BTRFS_I(inode)->outstanding_extents != 2) {
984 ret = -EINVAL;
985 test_msg("Miscount, wanted 2, got %u\n",
986 BTRFS_I(inode)->outstanding_extents);
987 goto out;
988 }
989
990 /* [BTRFS_MAX_EXTENT_SIZE][4K] */
991 BTRFS_I(inode)->outstanding_extents++;
992 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
993 (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
994 NULL);
995 if (ret) {
996 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
997 goto out;
998 }
999 if (BTRFS_I(inode)->outstanding_extents != 2) {
1000 ret = -EINVAL;
1001 test_msg("Miscount, wanted 2, got %u\n",
1002 BTRFS_I(inode)->outstanding_extents);
1003 goto out;
1004 }
1005
1006 /*
1007 * [BTRFS_MAX_EXTENT_SIZE+4K][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4K]
1008 *
1009 * I'm artificially adding 2 to outstanding_extents because in the
1010 * buffered IO case we'd add things up as we go, but I don't feel like
1011 * doing that here, this isn't the interesting case we want to test.
1012 */
1013 BTRFS_I(inode)->outstanding_extents += 2;
1014 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE + 8192,
1015 (BTRFS_MAX_EXTENT_SIZE << 1) + 12287,
1016 NULL);
1017 if (ret) {
1018 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1019 goto out;
1020 }
1021 if (BTRFS_I(inode)->outstanding_extents != 4) {
1022 ret = -EINVAL;
1023 test_msg("Miscount, wanted 4, got %u\n",
1024 BTRFS_I(inode)->outstanding_extents);
1025 goto out;
1026 }
1027
1028 /* [BTRFS_MAX_EXTENT_SIZE+4k][4k][BTRFS_MAX_EXTENT_SIZE+4k] */
1029 BTRFS_I(inode)->outstanding_extents++;
1030 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
1031 BTRFS_MAX_EXTENT_SIZE+8191, NULL);
1032 if (ret) {
1033 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1034 goto out;
1035 }
1036 if (BTRFS_I(inode)->outstanding_extents != 3) {
1037 ret = -EINVAL;
1038 test_msg("Miscount, wanted 3, got %u\n",
1039 BTRFS_I(inode)->outstanding_extents);
1040 goto out;
1041 }
1042
1043 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1044 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1045 BTRFS_MAX_EXTENT_SIZE+4096,
1046 BTRFS_MAX_EXTENT_SIZE+8191,
1047 EXTENT_DIRTY | EXTENT_DELALLOC |
1048 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1049 NULL, GFP_KERNEL);
1050 if (ret) {
1051 test_msg("clear_extent_bit returned %d\n", ret);
1052 goto out;
1053 }
1054 if (BTRFS_I(inode)->outstanding_extents != 4) {
1055 ret = -EINVAL;
1056 test_msg("Miscount, wanted 4, got %u\n",
1057 BTRFS_I(inode)->outstanding_extents);
1058 goto out;
1059 }
1060
1061 /*
1062 * Refill the hole again just for good measure, because I thought it
1063 * might fail and I'd rather satisfy my paranoia at this point.
1064 */
1065 BTRFS_I(inode)->outstanding_extents++;
1066 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
1067 BTRFS_MAX_EXTENT_SIZE+8191, NULL);
1068 if (ret) {
1069 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1070 goto out;
1071 }
1072 if (BTRFS_I(inode)->outstanding_extents != 3) {
1073 ret = -EINVAL;
1074 test_msg("Miscount, wanted 3, got %u\n",
1075 BTRFS_I(inode)->outstanding_extents);
1076 goto out;
1077 }
1078
1079 /* Empty */
1080 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1081 EXTENT_DIRTY | EXTENT_DELALLOC |
1082 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1083 NULL, GFP_KERNEL);
1084 if (ret) {
1085 test_msg("clear_extent_bit returned %d\n", ret);
1086 goto out;
1087 }
1088 if (BTRFS_I(inode)->outstanding_extents) {
1089 ret = -EINVAL;
1090 test_msg("Miscount, wanted 0, got %u\n",
1091 BTRFS_I(inode)->outstanding_extents);
1092 goto out;
1093 }
1094 ret = 0;
1095out:
1096 if (ret)
1097 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1098 EXTENT_DIRTY | EXTENT_DELALLOC |
1099 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1100 NULL, GFP_KERNEL);
1101 iput(inode);
1102 btrfs_free_dummy_root(root);
1103 return ret;
1104}
1105
1106int btrfs_test_inodes(void)
1107{
1108 int ret;
1109
1110 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1111 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
1112 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1113
1114 test_msg("Running btrfs_get_extent tests\n");
1115 ret = test_btrfs_get_extent();
1116 if (ret)
1117 return ret;
1118 test_msg("Running hole first btrfs_get_extent test\n");
1119 ret = test_hole_first();
1120 if (ret)
1121 return ret;
1122 test_msg("Running outstanding_extents tests\n");
1123 return test_extent_accounting();
1124}
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 <linux/types.h>
20#include "btrfs-tests.h"
21#include "../ctree.h"
22#include "../btrfs_inode.h"
23#include "../disk-io.h"
24#include "../extent_io.h"
25#include "../volumes.h"
26#include "../compression.h"
27
28static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
29 u64 ram_bytes, u64 offset, u64 disk_bytenr,
30 u64 disk_len, u32 type, u8 compression, int slot)
31{
32 struct btrfs_path path;
33 struct btrfs_file_extent_item *fi;
34 struct extent_buffer *leaf = root->node;
35 struct btrfs_key key;
36 u32 value_len = sizeof(struct btrfs_file_extent_item);
37
38 if (type == BTRFS_FILE_EXTENT_INLINE)
39 value_len += len;
40 memset(&path, 0, sizeof(path));
41
42 path.nodes[0] = leaf;
43 path.slots[0] = slot;
44
45 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
46 key.type = BTRFS_EXTENT_DATA_KEY;
47 key.offset = start;
48
49 setup_items_for_insert(root, &path, &key, &value_len, value_len,
50 value_len + sizeof(struct btrfs_item), 1);
51 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
52 btrfs_set_file_extent_generation(leaf, fi, 1);
53 btrfs_set_file_extent_type(leaf, fi, type);
54 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
55 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
56 btrfs_set_file_extent_offset(leaf, fi, offset);
57 btrfs_set_file_extent_num_bytes(leaf, fi, len);
58 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
59 btrfs_set_file_extent_compression(leaf, fi, compression);
60 btrfs_set_file_extent_encryption(leaf, fi, 0);
61 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
62}
63
64static void insert_inode_item_key(struct btrfs_root *root)
65{
66 struct btrfs_path path;
67 struct extent_buffer *leaf = root->node;
68 struct btrfs_key key;
69 u32 value_len = 0;
70
71 memset(&path, 0, sizeof(path));
72
73 path.nodes[0] = leaf;
74 path.slots[0] = 0;
75
76 key.objectid = BTRFS_INODE_ITEM_KEY;
77 key.type = BTRFS_INODE_ITEM_KEY;
78 key.offset = 0;
79
80 setup_items_for_insert(root, &path, &key, &value_len, value_len,
81 value_len + sizeof(struct btrfs_item), 1);
82}
83
84/*
85 * Build the most complicated map of extents the earth has ever seen. We want
86 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
87 * diagram of how the extents will look though this may not be possible we still
88 * want to make sure everything acts normally (the last number is not inclusive)
89 *
90 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
91 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
92 *
93 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
94 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
95 *
96 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
97 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
98 *
99 * [69635-73731][ 73731 - 86019 ][86019-90115]
100 * [ regular ][ hole but no extent][ regular ]
101 */
102static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
103{
104 int slot = 0;
105 u64 disk_bytenr = SZ_1M;
106 u64 offset = 0;
107
108 /* First we want a hole */
109 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
110 slot);
111 slot++;
112 offset += 5;
113
114 /*
115 * Now we want an inline extent, I don't think this is possible but hey
116 * why not? Also keep in mind if we have an inline extent it counts as
117 * the whole first page. If we were to expand it we would have to cow
118 * and we wouldn't have an inline extent anymore.
119 */
120 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
121 slot);
122 slot++;
123 offset = sectorsize;
124
125 /* Now another hole */
126 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
127 slot);
128 slot++;
129 offset += 4;
130
131 /* Now for a regular extent */
132 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
133 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
134 slot++;
135 disk_bytenr += sectorsize;
136 offset += sectorsize - 1;
137
138 /*
139 * Now for 3 extents that were split from a hole punch so we test
140 * offsets properly.
141 */
142 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
143 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
144 slot++;
145 offset += sectorsize;
146 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
147 BTRFS_FILE_EXTENT_REG, 0, slot);
148 slot++;
149 offset += sectorsize;
150 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
151 2 * sectorsize, disk_bytenr, 4 * sectorsize,
152 BTRFS_FILE_EXTENT_REG, 0, slot);
153 slot++;
154 offset += 2 * sectorsize;
155 disk_bytenr += 4 * sectorsize;
156
157 /* Now for a unwritten prealloc extent */
158 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
159 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
160 slot++;
161 offset += sectorsize;
162
163 /*
164 * We want to jack up disk_bytenr a little more so the em stuff doesn't
165 * merge our records.
166 */
167 disk_bytenr += 2 * sectorsize;
168
169 /*
170 * Now for a partially written prealloc extent, basically the same as
171 * the hole punch example above. Ram_bytes never changes when you mark
172 * extents written btw.
173 */
174 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
175 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
176 slot++;
177 offset += sectorsize;
178 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
179 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
180 slot);
181 slot++;
182 offset += sectorsize;
183 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
184 2 * sectorsize, disk_bytenr, 4 * sectorsize,
185 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
186 slot++;
187 offset += 2 * sectorsize;
188 disk_bytenr += 4 * sectorsize;
189
190 /* Now a normal compressed extent */
191 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
192 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
193 BTRFS_COMPRESS_ZLIB, slot);
194 slot++;
195 offset += 2 * sectorsize;
196 /* No merges */
197 disk_bytenr += 2 * sectorsize;
198
199 /* Now a split compressed extent */
200 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
201 sectorsize, BTRFS_FILE_EXTENT_REG,
202 BTRFS_COMPRESS_ZLIB, slot);
203 slot++;
204 offset += sectorsize;
205 insert_extent(root, offset, sectorsize, sectorsize, 0,
206 disk_bytenr + sectorsize, sectorsize,
207 BTRFS_FILE_EXTENT_REG, 0, slot);
208 slot++;
209 offset += sectorsize;
210 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
211 2 * sectorsize, disk_bytenr, sectorsize,
212 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
213 slot++;
214 offset += 2 * sectorsize;
215 disk_bytenr += 2 * sectorsize;
216
217 /* Now extents that have a hole but no hole extent */
218 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
219 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
220 slot++;
221 offset += 4 * sectorsize;
222 disk_bytenr += sectorsize;
223 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
224 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
225}
226
227static unsigned long prealloc_only = 0;
228static unsigned long compressed_only = 0;
229static unsigned long vacancy_only = 0;
230
231static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
232{
233 struct btrfs_fs_info *fs_info = NULL;
234 struct inode *inode = NULL;
235 struct btrfs_root *root = NULL;
236 struct extent_map *em = NULL;
237 u64 orig_start;
238 u64 disk_bytenr;
239 u64 offset;
240 int ret = -ENOMEM;
241
242 inode = btrfs_new_test_inode();
243 if (!inode) {
244 test_msg("Couldn't allocate inode\n");
245 return ret;
246 }
247
248 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
249 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
250 BTRFS_I(inode)->location.offset = 0;
251
252 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
253 if (!fs_info) {
254 test_msg("Couldn't allocate dummy fs info\n");
255 goto out;
256 }
257
258 root = btrfs_alloc_dummy_root(fs_info);
259 if (IS_ERR(root)) {
260 test_msg("Couldn't allocate root\n");
261 goto out;
262 }
263
264 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
265 if (!root->node) {
266 test_msg("Couldn't allocate dummy buffer\n");
267 goto out;
268 }
269
270 /*
271 * We will just free a dummy node if it's ref count is 2 so we need an
272 * extra ref so our searches don't accidentally release our page.
273 */
274 extent_buffer_get(root->node);
275 btrfs_set_header_nritems(root->node, 0);
276 btrfs_set_header_level(root->node, 0);
277 ret = -EINVAL;
278
279 /* First with no extents */
280 BTRFS_I(inode)->root = root;
281 em = btrfs_get_extent(inode, NULL, 0, 0, sectorsize, 0);
282 if (IS_ERR(em)) {
283 em = NULL;
284 test_msg("Got an error when we shouldn't have\n");
285 goto out;
286 }
287 if (em->block_start != EXTENT_MAP_HOLE) {
288 test_msg("Expected a hole, got %llu\n", em->block_start);
289 goto out;
290 }
291 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
292 test_msg("Vacancy flag wasn't set properly\n");
293 goto out;
294 }
295 free_extent_map(em);
296 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
297
298 /*
299 * All of the magic numbers are based on the mapping setup in
300 * setup_file_extents, so if you change anything there you need to
301 * update the comment and update the expected values below.
302 */
303 setup_file_extents(root, sectorsize);
304
305 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
306 if (IS_ERR(em)) {
307 test_msg("Got an error when we shouldn't have\n");
308 goto out;
309 }
310 if (em->block_start != EXTENT_MAP_HOLE) {
311 test_msg("Expected a hole, got %llu\n", em->block_start);
312 goto out;
313 }
314 if (em->start != 0 || em->len != 5) {
315 test_msg("Unexpected extent wanted start 0 len 5, got start "
316 "%llu len %llu\n", em->start, em->len);
317 goto out;
318 }
319 if (em->flags != 0) {
320 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
321 goto out;
322 }
323 offset = em->start + em->len;
324 free_extent_map(em);
325
326 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
327 if (IS_ERR(em)) {
328 test_msg("Got an error when we shouldn't have\n");
329 goto out;
330 }
331 if (em->block_start != EXTENT_MAP_INLINE) {
332 test_msg("Expected an inline, got %llu\n", em->block_start);
333 goto out;
334 }
335
336 if (em->start != offset || em->len != (sectorsize - 5)) {
337 test_msg("Unexpected extent wanted start %llu len 1, got start "
338 "%llu len %llu\n", offset, em->start, em->len);
339 goto out;
340 }
341 if (em->flags != 0) {
342 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
343 goto out;
344 }
345 /*
346 * We don't test anything else for inline since it doesn't get set
347 * unless we have a page for it to write into. Maybe we should change
348 * this?
349 */
350 offset = em->start + em->len;
351 free_extent_map(em);
352
353 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
354 if (IS_ERR(em)) {
355 test_msg("Got an error when we shouldn't have\n");
356 goto out;
357 }
358 if (em->block_start != EXTENT_MAP_HOLE) {
359 test_msg("Expected a hole, got %llu\n", em->block_start);
360 goto out;
361 }
362 if (em->start != offset || em->len != 4) {
363 test_msg("Unexpected extent wanted start %llu len 4, got start "
364 "%llu len %llu\n", offset, em->start, em->len);
365 goto out;
366 }
367 if (em->flags != 0) {
368 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
369 goto out;
370 }
371 offset = em->start + em->len;
372 free_extent_map(em);
373
374 /* Regular extent */
375 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
376 if (IS_ERR(em)) {
377 test_msg("Got an error when we shouldn't have\n");
378 goto out;
379 }
380 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
381 test_msg("Expected a real extent, got %llu\n", em->block_start);
382 goto out;
383 }
384 if (em->start != offset || em->len != sectorsize - 1) {
385 test_msg("Unexpected extent wanted start %llu len 4095, got "
386 "start %llu len %llu\n", offset, em->start, em->len);
387 goto out;
388 }
389 if (em->flags != 0) {
390 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
391 goto out;
392 }
393 if (em->orig_start != em->start) {
394 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
395 em->orig_start);
396 goto out;
397 }
398 offset = em->start + em->len;
399 free_extent_map(em);
400
401 /* The next 3 are split extents */
402 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
403 if (IS_ERR(em)) {
404 test_msg("Got an error when we shouldn't have\n");
405 goto out;
406 }
407 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
408 test_msg("Expected a real extent, got %llu\n", em->block_start);
409 goto out;
410 }
411 if (em->start != offset || em->len != sectorsize) {
412 test_msg("Unexpected extent start %llu len %u, "
413 "got start %llu len %llu\n",
414 offset, sectorsize, em->start, em->len);
415 goto out;
416 }
417 if (em->flags != 0) {
418 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
419 goto out;
420 }
421 if (em->orig_start != em->start) {
422 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
423 em->orig_start);
424 goto out;
425 }
426 disk_bytenr = em->block_start;
427 orig_start = em->start;
428 offset = em->start + em->len;
429 free_extent_map(em);
430
431 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
432 if (IS_ERR(em)) {
433 test_msg("Got an error when we shouldn't have\n");
434 goto out;
435 }
436 if (em->block_start != EXTENT_MAP_HOLE) {
437 test_msg("Expected a hole, got %llu\n", em->block_start);
438 goto out;
439 }
440 if (em->start != offset || em->len != sectorsize) {
441 test_msg("Unexpected extent wanted start %llu len %u, "
442 "got start %llu len %llu\n",
443 offset, sectorsize, em->start, em->len);
444 goto out;
445 }
446 if (em->flags != 0) {
447 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
448 goto out;
449 }
450 offset = em->start + em->len;
451 free_extent_map(em);
452
453 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
454 if (IS_ERR(em)) {
455 test_msg("Got an error when we shouldn't have\n");
456 goto out;
457 }
458 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
459 test_msg("Expected a real extent, got %llu\n", em->block_start);
460 goto out;
461 }
462 if (em->start != offset || em->len != 2 * sectorsize) {
463 test_msg("Unexpected extent wanted start %llu len %u, "
464 "got start %llu len %llu\n",
465 offset, 2 * sectorsize, em->start, em->len);
466 goto out;
467 }
468 if (em->flags != 0) {
469 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
470 goto out;
471 }
472 if (em->orig_start != orig_start) {
473 test_msg("Wrong orig offset, want %llu, have %llu\n",
474 orig_start, em->orig_start);
475 goto out;
476 }
477 disk_bytenr += (em->start - orig_start);
478 if (em->block_start != disk_bytenr) {
479 test_msg("Wrong block start, want %llu, have %llu\n",
480 disk_bytenr, em->block_start);
481 goto out;
482 }
483 offset = em->start + em->len;
484 free_extent_map(em);
485
486 /* Prealloc extent */
487 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
488 if (IS_ERR(em)) {
489 test_msg("Got an error when we shouldn't have\n");
490 goto out;
491 }
492 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
493 test_msg("Expected a real extent, got %llu\n", em->block_start);
494 goto out;
495 }
496 if (em->start != offset || em->len != sectorsize) {
497 test_msg("Unexpected extent wanted start %llu len %u, "
498 "got start %llu len %llu\n",
499 offset, sectorsize, em->start, em->len);
500 goto out;
501 }
502 if (em->flags != prealloc_only) {
503 test_msg("Unexpected flags set, want %lu have %lu\n",
504 prealloc_only, em->flags);
505 goto out;
506 }
507 if (em->orig_start != em->start) {
508 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
509 em->orig_start);
510 goto out;
511 }
512 offset = em->start + em->len;
513 free_extent_map(em);
514
515 /* The next 3 are a half written prealloc extent */
516 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
517 if (IS_ERR(em)) {
518 test_msg("Got an error when we shouldn't have\n");
519 goto out;
520 }
521 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
522 test_msg("Expected a real extent, got %llu\n", em->block_start);
523 goto out;
524 }
525 if (em->start != offset || em->len != sectorsize) {
526 test_msg("Unexpected extent wanted start %llu len %u, "
527 "got start %llu len %llu\n",
528 offset, sectorsize, em->start, em->len);
529 goto out;
530 }
531 if (em->flags != prealloc_only) {
532 test_msg("Unexpected flags set, want %lu have %lu\n",
533 prealloc_only, em->flags);
534 goto out;
535 }
536 if (em->orig_start != em->start) {
537 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
538 em->orig_start);
539 goto out;
540 }
541 disk_bytenr = em->block_start;
542 orig_start = em->start;
543 offset = em->start + em->len;
544 free_extent_map(em);
545
546 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
547 if (IS_ERR(em)) {
548 test_msg("Got an error when we shouldn't have\n");
549 goto out;
550 }
551 if (em->block_start >= EXTENT_MAP_HOLE) {
552 test_msg("Expected a real extent, got %llu\n", em->block_start);
553 goto out;
554 }
555 if (em->start != offset || em->len != sectorsize) {
556 test_msg("Unexpected extent wanted start %llu len %u, "
557 "got start %llu len %llu\n",
558 offset, sectorsize, em->start, em->len);
559 goto out;
560 }
561 if (em->flags != 0) {
562 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
563 goto out;
564 }
565 if (em->orig_start != orig_start) {
566 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
567 orig_start, em->orig_start);
568 goto out;
569 }
570 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
571 test_msg("Unexpected block start, wanted %llu, have %llu\n",
572 disk_bytenr + (em->start - em->orig_start),
573 em->block_start);
574 goto out;
575 }
576 offset = em->start + em->len;
577 free_extent_map(em);
578
579 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
580 if (IS_ERR(em)) {
581 test_msg("Got an error when we shouldn't have\n");
582 goto out;
583 }
584 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
585 test_msg("Expected a real extent, got %llu\n", em->block_start);
586 goto out;
587 }
588 if (em->start != offset || em->len != 2 * sectorsize) {
589 test_msg("Unexpected extent wanted start %llu len %u, "
590 "got start %llu len %llu\n",
591 offset, 2 * sectorsize, em->start, em->len);
592 goto out;
593 }
594 if (em->flags != prealloc_only) {
595 test_msg("Unexpected flags set, want %lu have %lu\n",
596 prealloc_only, em->flags);
597 goto out;
598 }
599 if (em->orig_start != orig_start) {
600 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
601 em->orig_start);
602 goto out;
603 }
604 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
605 test_msg("Unexpected block start, wanted %llu, have %llu\n",
606 disk_bytenr + (em->start - em->orig_start),
607 em->block_start);
608 goto out;
609 }
610 offset = em->start + em->len;
611 free_extent_map(em);
612
613 /* Now for the compressed extent */
614 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
615 if (IS_ERR(em)) {
616 test_msg("Got an error when we shouldn't have\n");
617 goto out;
618 }
619 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
620 test_msg("Expected a real extent, got %llu\n", em->block_start);
621 goto out;
622 }
623 if (em->start != offset || em->len != 2 * sectorsize) {
624 test_msg("Unexpected extent wanted start %llu len %u,"
625 "got start %llu len %llu\n",
626 offset, 2 * sectorsize, em->start, em->len);
627 goto out;
628 }
629 if (em->flags != compressed_only) {
630 test_msg("Unexpected flags set, want %lu have %lu\n",
631 compressed_only, em->flags);
632 goto out;
633 }
634 if (em->orig_start != em->start) {
635 test_msg("Wrong orig offset, want %llu, have %llu\n",
636 em->start, em->orig_start);
637 goto out;
638 }
639 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
640 test_msg("Unexpected compress type, wanted %d, got %d\n",
641 BTRFS_COMPRESS_ZLIB, em->compress_type);
642 goto out;
643 }
644 offset = em->start + em->len;
645 free_extent_map(em);
646
647 /* Split compressed extent */
648 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
649 if (IS_ERR(em)) {
650 test_msg("Got an error when we shouldn't have\n");
651 goto out;
652 }
653 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
654 test_msg("Expected a real extent, got %llu\n", em->block_start);
655 goto out;
656 }
657 if (em->start != offset || em->len != sectorsize) {
658 test_msg("Unexpected extent wanted start %llu len %u,"
659 "got start %llu len %llu\n",
660 offset, sectorsize, em->start, em->len);
661 goto out;
662 }
663 if (em->flags != compressed_only) {
664 test_msg("Unexpected flags set, want %lu have %lu\n",
665 compressed_only, em->flags);
666 goto out;
667 }
668 if (em->orig_start != em->start) {
669 test_msg("Wrong orig offset, want %llu, have %llu\n",
670 em->start, em->orig_start);
671 goto out;
672 }
673 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
674 test_msg("Unexpected compress type, wanted %d, got %d\n",
675 BTRFS_COMPRESS_ZLIB, em->compress_type);
676 goto out;
677 }
678 disk_bytenr = em->block_start;
679 orig_start = em->start;
680 offset = em->start + em->len;
681 free_extent_map(em);
682
683 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
684 if (IS_ERR(em)) {
685 test_msg("Got an error when we shouldn't have\n");
686 goto out;
687 }
688 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
689 test_msg("Expected a real extent, got %llu\n", em->block_start);
690 goto out;
691 }
692 if (em->start != offset || em->len != sectorsize) {
693 test_msg("Unexpected extent wanted start %llu len %u, "
694 "got start %llu len %llu\n",
695 offset, sectorsize, em->start, em->len);
696 goto out;
697 }
698 if (em->flags != 0) {
699 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
700 goto out;
701 }
702 if (em->orig_start != em->start) {
703 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
704 em->orig_start);
705 goto out;
706 }
707 offset = em->start + em->len;
708 free_extent_map(em);
709
710 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
711 if (IS_ERR(em)) {
712 test_msg("Got an error when we shouldn't have\n");
713 goto out;
714 }
715 if (em->block_start != disk_bytenr) {
716 test_msg("Block start does not match, want %llu got %llu\n",
717 disk_bytenr, em->block_start);
718 goto out;
719 }
720 if (em->start != offset || em->len != 2 * sectorsize) {
721 test_msg("Unexpected extent wanted start %llu len %u, "
722 "got start %llu len %llu\n",
723 offset, 2 * sectorsize, em->start, em->len);
724 goto out;
725 }
726 if (em->flags != compressed_only) {
727 test_msg("Unexpected flags set, want %lu have %lu\n",
728 compressed_only, em->flags);
729 goto out;
730 }
731 if (em->orig_start != orig_start) {
732 test_msg("Wrong orig offset, want %llu, have %llu\n",
733 em->start, orig_start);
734 goto out;
735 }
736 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
737 test_msg("Unexpected compress type, wanted %d, got %d\n",
738 BTRFS_COMPRESS_ZLIB, em->compress_type);
739 goto out;
740 }
741 offset = em->start + em->len;
742 free_extent_map(em);
743
744 /* A hole between regular extents but no hole extent */
745 em = btrfs_get_extent(inode, NULL, 0, offset + 6, sectorsize, 0);
746 if (IS_ERR(em)) {
747 test_msg("Got an error when we shouldn't have\n");
748 goto out;
749 }
750 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
751 test_msg("Expected a real extent, got %llu\n", em->block_start);
752 goto out;
753 }
754 if (em->start != offset || em->len != sectorsize) {
755 test_msg("Unexpected extent wanted start %llu len %u, "
756 "got start %llu len %llu\n",
757 offset, sectorsize, em->start, em->len);
758 goto out;
759 }
760 if (em->flags != 0) {
761 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
762 goto out;
763 }
764 if (em->orig_start != em->start) {
765 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
766 em->orig_start);
767 goto out;
768 }
769 offset = em->start + em->len;
770 free_extent_map(em);
771
772 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
773 if (IS_ERR(em)) {
774 test_msg("Got an error when we shouldn't have\n");
775 goto out;
776 }
777 if (em->block_start != EXTENT_MAP_HOLE) {
778 test_msg("Expected a hole extent, got %llu\n", em->block_start);
779 goto out;
780 }
781 /*
782 * Currently we just return a length that we requested rather than the
783 * length of the actual hole, if this changes we'll have to change this
784 * test.
785 */
786 if (em->start != offset || em->len != 3 * sectorsize) {
787 test_msg("Unexpected extent wanted start %llu len %u, "
788 "got start %llu len %llu\n",
789 offset, 3 * sectorsize, em->start, em->len);
790 goto out;
791 }
792 if (em->flags != vacancy_only) {
793 test_msg("Unexpected flags set, want %lu have %lu\n",
794 vacancy_only, em->flags);
795 goto out;
796 }
797 if (em->orig_start != em->start) {
798 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
799 em->orig_start);
800 goto out;
801 }
802 offset = em->start + em->len;
803 free_extent_map(em);
804
805 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
806 if (IS_ERR(em)) {
807 test_msg("Got an error when we shouldn't have\n");
808 goto out;
809 }
810 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
811 test_msg("Expected a real extent, got %llu\n", em->block_start);
812 goto out;
813 }
814 if (em->start != offset || em->len != sectorsize) {
815 test_msg("Unexpected extent wanted start %llu len %u,"
816 "got start %llu len %llu\n",
817 offset, sectorsize, em->start, em->len);
818 goto out;
819 }
820 if (em->flags != 0) {
821 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
822 goto out;
823 }
824 if (em->orig_start != em->start) {
825 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
826 em->orig_start);
827 goto out;
828 }
829 ret = 0;
830out:
831 if (!IS_ERR(em))
832 free_extent_map(em);
833 iput(inode);
834 btrfs_free_dummy_root(root);
835 btrfs_free_dummy_fs_info(fs_info);
836 return ret;
837}
838
839static int test_hole_first(u32 sectorsize, u32 nodesize)
840{
841 struct btrfs_fs_info *fs_info = NULL;
842 struct inode *inode = NULL;
843 struct btrfs_root *root = NULL;
844 struct extent_map *em = NULL;
845 int ret = -ENOMEM;
846
847 inode = btrfs_new_test_inode();
848 if (!inode) {
849 test_msg("Couldn't allocate inode\n");
850 return ret;
851 }
852
853 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
854 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
855 BTRFS_I(inode)->location.offset = 0;
856
857 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
858 if (!fs_info) {
859 test_msg("Couldn't allocate dummy fs info\n");
860 goto out;
861 }
862
863 root = btrfs_alloc_dummy_root(fs_info);
864 if (IS_ERR(root)) {
865 test_msg("Couldn't allocate root\n");
866 goto out;
867 }
868
869 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
870 if (!root->node) {
871 test_msg("Couldn't allocate dummy buffer\n");
872 goto out;
873 }
874
875 extent_buffer_get(root->node);
876 btrfs_set_header_nritems(root->node, 0);
877 btrfs_set_header_level(root->node, 0);
878 BTRFS_I(inode)->root = root;
879 ret = -EINVAL;
880
881 /*
882 * Need a blank inode item here just so we don't confuse
883 * btrfs_get_extent.
884 */
885 insert_inode_item_key(root);
886 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
887 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
888 em = btrfs_get_extent(inode, NULL, 0, 0, 2 * sectorsize, 0);
889 if (IS_ERR(em)) {
890 test_msg("Got an error when we shouldn't have\n");
891 goto out;
892 }
893 if (em->block_start != EXTENT_MAP_HOLE) {
894 test_msg("Expected a hole, got %llu\n", em->block_start);
895 goto out;
896 }
897 if (em->start != 0 || em->len != sectorsize) {
898 test_msg("Unexpected extent wanted start 0 len %u, "
899 "got start %llu len %llu\n",
900 sectorsize, em->start, em->len);
901 goto out;
902 }
903 if (em->flags != vacancy_only) {
904 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
905 em->flags);
906 goto out;
907 }
908 free_extent_map(em);
909
910 em = btrfs_get_extent(inode, NULL, 0, sectorsize, 2 * sectorsize, 0);
911 if (IS_ERR(em)) {
912 test_msg("Got an error when we shouldn't have\n");
913 goto out;
914 }
915 if (em->block_start != sectorsize) {
916 test_msg("Expected a real extent, got %llu\n", em->block_start);
917 goto out;
918 }
919 if (em->start != sectorsize || em->len != sectorsize) {
920 test_msg("Unexpected extent wanted start %u len %u, "
921 "got start %llu len %llu\n",
922 sectorsize, sectorsize, em->start, em->len);
923 goto out;
924 }
925 if (em->flags != 0) {
926 test_msg("Unexpected flags set, wanted 0 got %lu\n",
927 em->flags);
928 goto out;
929 }
930 ret = 0;
931out:
932 if (!IS_ERR(em))
933 free_extent_map(em);
934 iput(inode);
935 btrfs_free_dummy_root(root);
936 btrfs_free_dummy_fs_info(fs_info);
937 return ret;
938}
939
940static int test_extent_accounting(u32 sectorsize, u32 nodesize)
941{
942 struct btrfs_fs_info *fs_info = NULL;
943 struct inode *inode = NULL;
944 struct btrfs_root *root = NULL;
945 int ret = -ENOMEM;
946
947 inode = btrfs_new_test_inode();
948 if (!inode) {
949 test_msg("Couldn't allocate inode\n");
950 return ret;
951 }
952
953 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
954 if (!fs_info) {
955 test_msg("Couldn't allocate dummy fs info\n");
956 goto out;
957 }
958
959 root = btrfs_alloc_dummy_root(fs_info);
960 if (IS_ERR(root)) {
961 test_msg("Couldn't allocate root\n");
962 goto out;
963 }
964
965 BTRFS_I(inode)->root = root;
966 btrfs_test_inode_set_ops(inode);
967
968 /* [BTRFS_MAX_EXTENT_SIZE] */
969 BTRFS_I(inode)->outstanding_extents++;
970 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
971 NULL, 0);
972 if (ret) {
973 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
974 goto out;
975 }
976 if (BTRFS_I(inode)->outstanding_extents != 1) {
977 ret = -EINVAL;
978 test_msg("Miscount, wanted 1, got %u\n",
979 BTRFS_I(inode)->outstanding_extents);
980 goto out;
981 }
982
983 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
984 BTRFS_I(inode)->outstanding_extents++;
985 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
986 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
987 NULL, 0);
988 if (ret) {
989 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
990 goto out;
991 }
992 if (BTRFS_I(inode)->outstanding_extents != 2) {
993 ret = -EINVAL;
994 test_msg("Miscount, wanted 2, got %u\n",
995 BTRFS_I(inode)->outstanding_extents);
996 goto out;
997 }
998
999 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
1000 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1001 BTRFS_MAX_EXTENT_SIZE >> 1,
1002 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
1003 EXTENT_DELALLOC | EXTENT_DIRTY |
1004 EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
1005 NULL, GFP_KERNEL);
1006 if (ret) {
1007 test_msg("clear_extent_bit returned %d\n", ret);
1008 goto out;
1009 }
1010 if (BTRFS_I(inode)->outstanding_extents != 2) {
1011 ret = -EINVAL;
1012 test_msg("Miscount, wanted 2, got %u\n",
1013 BTRFS_I(inode)->outstanding_extents);
1014 goto out;
1015 }
1016
1017 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
1018 BTRFS_I(inode)->outstanding_extents++;
1019 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
1020 (BTRFS_MAX_EXTENT_SIZE >> 1)
1021 + sectorsize - 1,
1022 NULL, 0);
1023 if (ret) {
1024 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1025 goto out;
1026 }
1027 if (BTRFS_I(inode)->outstanding_extents != 2) {
1028 ret = -EINVAL;
1029 test_msg("Miscount, wanted 2, got %u\n",
1030 BTRFS_I(inode)->outstanding_extents);
1031 goto out;
1032 }
1033
1034 /*
1035 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1036 *
1037 * I'm artificially adding 2 to outstanding_extents because in the
1038 * buffered IO case we'd add things up as we go, but I don't feel like
1039 * doing that here, this isn't the interesting case we want to test.
1040 */
1041 BTRFS_I(inode)->outstanding_extents += 2;
1042 ret = btrfs_set_extent_delalloc(inode,
1043 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1044 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1045 NULL, 0);
1046 if (ret) {
1047 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1048 goto out;
1049 }
1050 if (BTRFS_I(inode)->outstanding_extents != 4) {
1051 ret = -EINVAL;
1052 test_msg("Miscount, wanted 4, got %u\n",
1053 BTRFS_I(inode)->outstanding_extents);
1054 goto out;
1055 }
1056
1057 /*
1058 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1059 */
1060 BTRFS_I(inode)->outstanding_extents++;
1061 ret = btrfs_set_extent_delalloc(inode,
1062 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1063 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
1064 if (ret) {
1065 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1066 goto out;
1067 }
1068 if (BTRFS_I(inode)->outstanding_extents != 3) {
1069 ret = -EINVAL;
1070 test_msg("Miscount, wanted 3, got %u\n",
1071 BTRFS_I(inode)->outstanding_extents);
1072 goto out;
1073 }
1074
1075 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1076 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1077 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1078 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1079 EXTENT_DIRTY | EXTENT_DELALLOC |
1080 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1081 NULL, GFP_KERNEL);
1082 if (ret) {
1083 test_msg("clear_extent_bit returned %d\n", ret);
1084 goto out;
1085 }
1086 if (BTRFS_I(inode)->outstanding_extents != 4) {
1087 ret = -EINVAL;
1088 test_msg("Miscount, wanted 4, got %u\n",
1089 BTRFS_I(inode)->outstanding_extents);
1090 goto out;
1091 }
1092
1093 /*
1094 * Refill the hole again just for good measure, because I thought it
1095 * might fail and I'd rather satisfy my paranoia at this point.
1096 */
1097 BTRFS_I(inode)->outstanding_extents++;
1098 ret = btrfs_set_extent_delalloc(inode,
1099 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1100 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
1101 if (ret) {
1102 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1103 goto out;
1104 }
1105 if (BTRFS_I(inode)->outstanding_extents != 3) {
1106 ret = -EINVAL;
1107 test_msg("Miscount, wanted 3, got %u\n",
1108 BTRFS_I(inode)->outstanding_extents);
1109 goto out;
1110 }
1111
1112 /* Empty */
1113 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1114 EXTENT_DIRTY | EXTENT_DELALLOC |
1115 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1116 NULL, GFP_KERNEL);
1117 if (ret) {
1118 test_msg("clear_extent_bit returned %d\n", ret);
1119 goto out;
1120 }
1121 if (BTRFS_I(inode)->outstanding_extents) {
1122 ret = -EINVAL;
1123 test_msg("Miscount, wanted 0, got %u\n",
1124 BTRFS_I(inode)->outstanding_extents);
1125 goto out;
1126 }
1127 ret = 0;
1128out:
1129 if (ret)
1130 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1131 EXTENT_DIRTY | EXTENT_DELALLOC |
1132 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1133 NULL, GFP_KERNEL);
1134 iput(inode);
1135 btrfs_free_dummy_root(root);
1136 btrfs_free_dummy_fs_info(fs_info);
1137 return ret;
1138}
1139
1140int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1141{
1142 int ret;
1143
1144 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1145 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
1146 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1147
1148 test_msg("Running btrfs_get_extent tests\n");
1149 ret = test_btrfs_get_extent(sectorsize, nodesize);
1150 if (ret)
1151 return ret;
1152 test_msg("Running hole first btrfs_get_extent test\n");
1153 ret = test_hole_first(sectorsize, nodesize);
1154 if (ret)
1155 return ret;
1156 test_msg("Running outstanding_extents tests\n");
1157 return test_extent_accounting(sectorsize, nodesize);
1158}