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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6#include <linux/types.h>
7#include "btrfs-tests.h"
8#include "../ctree.h"
9#include "../btrfs_inode.h"
10#include "../disk-io.h"
11#include "../extent_io.h"
12#include "../volumes.h"
13#include "../compression.h"
14
15static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
16 u64 ram_bytes, u64 offset, u64 disk_bytenr,
17 u64 disk_len, u32 type, u8 compression, int slot)
18{
19 struct btrfs_path path;
20 struct btrfs_file_extent_item *fi;
21 struct extent_buffer *leaf = root->node;
22 struct btrfs_key key;
23 u32 value_len = sizeof(struct btrfs_file_extent_item);
24
25 if (type == BTRFS_FILE_EXTENT_INLINE)
26 value_len += len;
27 memset(&path, 0, sizeof(path));
28
29 path.nodes[0] = leaf;
30 path.slots[0] = slot;
31
32 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
33 key.type = BTRFS_EXTENT_DATA_KEY;
34 key.offset = start;
35
36 setup_items_for_insert(root, &path, &key, &value_len, value_len,
37 value_len + sizeof(struct btrfs_item), 1);
38 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
39 btrfs_set_file_extent_generation(leaf, fi, 1);
40 btrfs_set_file_extent_type(leaf, fi, type);
41 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
42 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
43 btrfs_set_file_extent_offset(leaf, fi, offset);
44 btrfs_set_file_extent_num_bytes(leaf, fi, len);
45 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
46 btrfs_set_file_extent_compression(leaf, fi, compression);
47 btrfs_set_file_extent_encryption(leaf, fi, 0);
48 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
49}
50
51static void insert_inode_item_key(struct btrfs_root *root)
52{
53 struct btrfs_path path;
54 struct extent_buffer *leaf = root->node;
55 struct btrfs_key key;
56 u32 value_len = 0;
57
58 memset(&path, 0, sizeof(path));
59
60 path.nodes[0] = leaf;
61 path.slots[0] = 0;
62
63 key.objectid = BTRFS_INODE_ITEM_KEY;
64 key.type = BTRFS_INODE_ITEM_KEY;
65 key.offset = 0;
66
67 setup_items_for_insert(root, &path, &key, &value_len, value_len,
68 value_len + sizeof(struct btrfs_item), 1);
69}
70
71/*
72 * Build the most complicated map of extents the earth has ever seen. We want
73 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
74 * diagram of how the extents will look though this may not be possible we still
75 * want to make sure everything acts normally (the last number is not inclusive)
76 *
77 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
78 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
79 *
80 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
81 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
82 *
83 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
84 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
85 *
86 * [69635-73731][ 73731 - 86019 ][86019-90115]
87 * [ regular ][ hole but no extent][ regular ]
88 */
89static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
90{
91 int slot = 0;
92 u64 disk_bytenr = SZ_1M;
93 u64 offset = 0;
94
95 /* First we want a hole */
96 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
97 slot);
98 slot++;
99 offset += 5;
100
101 /*
102 * Now we want an inline extent, I don't think this is possible but hey
103 * why not? Also keep in mind if we have an inline extent it counts as
104 * the whole first page. If we were to expand it we would have to cow
105 * and we wouldn't have an inline extent anymore.
106 */
107 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
108 slot);
109 slot++;
110 offset = sectorsize;
111
112 /* Now another hole */
113 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
114 slot);
115 slot++;
116 offset += 4;
117
118 /* Now for a regular extent */
119 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
120 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
121 slot++;
122 disk_bytenr += sectorsize;
123 offset += sectorsize - 1;
124
125 /*
126 * Now for 3 extents that were split from a hole punch so we test
127 * offsets properly.
128 */
129 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
130 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
131 slot++;
132 offset += sectorsize;
133 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
134 BTRFS_FILE_EXTENT_REG, 0, slot);
135 slot++;
136 offset += sectorsize;
137 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
138 2 * sectorsize, disk_bytenr, 4 * sectorsize,
139 BTRFS_FILE_EXTENT_REG, 0, slot);
140 slot++;
141 offset += 2 * sectorsize;
142 disk_bytenr += 4 * sectorsize;
143
144 /* Now for a unwritten prealloc extent */
145 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
146 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
147 slot++;
148 offset += sectorsize;
149
150 /*
151 * We want to jack up disk_bytenr a little more so the em stuff doesn't
152 * merge our records.
153 */
154 disk_bytenr += 2 * sectorsize;
155
156 /*
157 * Now for a partially written prealloc extent, basically the same as
158 * the hole punch example above. Ram_bytes never changes when you mark
159 * extents written btw.
160 */
161 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
162 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
163 slot++;
164 offset += sectorsize;
165 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
166 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
167 slot);
168 slot++;
169 offset += sectorsize;
170 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
171 2 * sectorsize, disk_bytenr, 4 * sectorsize,
172 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
173 slot++;
174 offset += 2 * sectorsize;
175 disk_bytenr += 4 * sectorsize;
176
177 /* Now a normal compressed extent */
178 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
179 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
180 BTRFS_COMPRESS_ZLIB, slot);
181 slot++;
182 offset += 2 * sectorsize;
183 /* No merges */
184 disk_bytenr += 2 * sectorsize;
185
186 /* Now a split compressed extent */
187 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
188 sectorsize, BTRFS_FILE_EXTENT_REG,
189 BTRFS_COMPRESS_ZLIB, slot);
190 slot++;
191 offset += sectorsize;
192 insert_extent(root, offset, sectorsize, sectorsize, 0,
193 disk_bytenr + sectorsize, sectorsize,
194 BTRFS_FILE_EXTENT_REG, 0, slot);
195 slot++;
196 offset += sectorsize;
197 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
198 2 * sectorsize, disk_bytenr, sectorsize,
199 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
200 slot++;
201 offset += 2 * sectorsize;
202 disk_bytenr += 2 * sectorsize;
203
204 /* Now extents that have a hole but no hole extent */
205 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
206 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
207 slot++;
208 offset += 4 * sectorsize;
209 disk_bytenr += sectorsize;
210 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
211 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
212}
213
214static unsigned long prealloc_only = 0;
215static unsigned long compressed_only = 0;
216static unsigned long vacancy_only = 0;
217
218static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
219{
220 struct btrfs_fs_info *fs_info = NULL;
221 struct inode *inode = NULL;
222 struct btrfs_root *root = NULL;
223 struct extent_map *em = NULL;
224 u64 orig_start;
225 u64 disk_bytenr;
226 u64 offset;
227 int ret = -ENOMEM;
228
229 test_msg("running btrfs_get_extent tests");
230
231 inode = btrfs_new_test_inode();
232 if (!inode) {
233 test_std_err(TEST_ALLOC_INODE);
234 return ret;
235 }
236
237 inode->i_mode = S_IFREG;
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 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
243 if (!fs_info) {
244 test_std_err(TEST_ALLOC_FS_INFO);
245 goto out;
246 }
247
248 root = btrfs_alloc_dummy_root(fs_info);
249 if (IS_ERR(root)) {
250 test_std_err(TEST_ALLOC_ROOT);
251 goto out;
252 }
253
254 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
255 if (!root->node) {
256 test_std_err(TEST_ALLOC_ROOT);
257 goto out;
258 }
259
260 btrfs_set_header_nritems(root->node, 0);
261 btrfs_set_header_level(root->node, 0);
262 ret = -EINVAL;
263
264 /* First with no extents */
265 BTRFS_I(inode)->root = root;
266 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize, 0);
267 if (IS_ERR(em)) {
268 em = NULL;
269 test_err("got an error when we shouldn't have");
270 goto out;
271 }
272 if (em->block_start != EXTENT_MAP_HOLE) {
273 test_err("expected a hole, got %llu", em->block_start);
274 goto out;
275 }
276 free_extent_map(em);
277 btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
278
279 /*
280 * All of the magic numbers are based on the mapping setup in
281 * setup_file_extents, so if you change anything there you need to
282 * update the comment and update the expected values below.
283 */
284 setup_file_extents(root, sectorsize);
285
286 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1, 0);
287 if (IS_ERR(em)) {
288 test_err("got an error when we shouldn't have");
289 goto out;
290 }
291 if (em->block_start != EXTENT_MAP_HOLE) {
292 test_err("expected a hole, got %llu", em->block_start);
293 goto out;
294 }
295 if (em->start != 0 || em->len != 5) {
296 test_err(
297 "unexpected extent wanted start 0 len 5, got start %llu len %llu",
298 em->start, em->len);
299 goto out;
300 }
301 if (em->flags != 0) {
302 test_err("unexpected flags set, want 0 have %lu", em->flags);
303 goto out;
304 }
305 offset = em->start + em->len;
306 free_extent_map(em);
307
308 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
309 if (IS_ERR(em)) {
310 test_err("got an error when we shouldn't have");
311 goto out;
312 }
313 if (em->block_start != EXTENT_MAP_INLINE) {
314 test_err("expected an inline, got %llu", em->block_start);
315 goto out;
316 }
317
318 if (em->start != offset || em->len != (sectorsize - 5)) {
319 test_err(
320 "unexpected extent wanted start %llu len 1, got start %llu len %llu",
321 offset, em->start, em->len);
322 goto out;
323 }
324 if (em->flags != 0) {
325 test_err("unexpected flags set, want 0 have %lu", em->flags);
326 goto out;
327 }
328 /*
329 * We don't test anything else for inline since it doesn't get set
330 * unless we have a page for it to write into. Maybe we should change
331 * this?
332 */
333 offset = em->start + em->len;
334 free_extent_map(em);
335
336 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
337 if (IS_ERR(em)) {
338 test_err("got an error when we shouldn't have");
339 goto out;
340 }
341 if (em->block_start != EXTENT_MAP_HOLE) {
342 test_err("expected a hole, got %llu", em->block_start);
343 goto out;
344 }
345 if (em->start != offset || em->len != 4) {
346 test_err(
347 "unexpected extent wanted start %llu len 4, got start %llu len %llu",
348 offset, em->start, em->len);
349 goto out;
350 }
351 if (em->flags != 0) {
352 test_err("unexpected flags set, want 0 have %lu", em->flags);
353 goto out;
354 }
355 offset = em->start + em->len;
356 free_extent_map(em);
357
358 /* Regular extent */
359 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
360 if (IS_ERR(em)) {
361 test_err("got an error when we shouldn't have");
362 goto out;
363 }
364 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
365 test_err("expected a real extent, got %llu", em->block_start);
366 goto out;
367 }
368 if (em->start != offset || em->len != sectorsize - 1) {
369 test_err(
370 "unexpected extent wanted start %llu len 4095, got start %llu len %llu",
371 offset, em->start, em->len);
372 goto out;
373 }
374 if (em->flags != 0) {
375 test_err("unexpected flags set, want 0 have %lu", em->flags);
376 goto out;
377 }
378 if (em->orig_start != em->start) {
379 test_err("wrong orig offset, want %llu, have %llu", em->start,
380 em->orig_start);
381 goto out;
382 }
383 offset = em->start + em->len;
384 free_extent_map(em);
385
386 /* The next 3 are split extents */
387 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
388 if (IS_ERR(em)) {
389 test_err("got an error when we shouldn't have");
390 goto out;
391 }
392 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
393 test_err("expected a real extent, got %llu", em->block_start);
394 goto out;
395 }
396 if (em->start != offset || em->len != sectorsize) {
397 test_err(
398 "unexpected extent start %llu len %u, got start %llu len %llu",
399 offset, sectorsize, em->start, em->len);
400 goto out;
401 }
402 if (em->flags != 0) {
403 test_err("unexpected flags set, want 0 have %lu", em->flags);
404 goto out;
405 }
406 if (em->orig_start != em->start) {
407 test_err("wrong orig offset, want %llu, have %llu", em->start,
408 em->orig_start);
409 goto out;
410 }
411 disk_bytenr = em->block_start;
412 orig_start = em->start;
413 offset = em->start + em->len;
414 free_extent_map(em);
415
416 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
417 if (IS_ERR(em)) {
418 test_err("got an error when we shouldn't have");
419 goto out;
420 }
421 if (em->block_start != EXTENT_MAP_HOLE) {
422 test_err("expected a hole, got %llu", em->block_start);
423 goto out;
424 }
425 if (em->start != offset || em->len != sectorsize) {
426 test_err(
427 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
428 offset, sectorsize, em->start, em->len);
429 goto out;
430 }
431 if (em->flags != 0) {
432 test_err("unexpected flags set, want 0 have %lu", em->flags);
433 goto out;
434 }
435 offset = em->start + em->len;
436 free_extent_map(em);
437
438 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
439 if (IS_ERR(em)) {
440 test_err("got an error when we shouldn't have");
441 goto out;
442 }
443 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
444 test_err("expected a real extent, got %llu", em->block_start);
445 goto out;
446 }
447 if (em->start != offset || em->len != 2 * sectorsize) {
448 test_err(
449 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
450 offset, 2 * sectorsize, em->start, em->len);
451 goto out;
452 }
453 if (em->flags != 0) {
454 test_err("unexpected flags set, want 0 have %lu", em->flags);
455 goto out;
456 }
457 if (em->orig_start != orig_start) {
458 test_err("wrong orig offset, want %llu, have %llu",
459 orig_start, em->orig_start);
460 goto out;
461 }
462 disk_bytenr += (em->start - orig_start);
463 if (em->block_start != disk_bytenr) {
464 test_err("wrong block start, want %llu, have %llu",
465 disk_bytenr, em->block_start);
466 goto out;
467 }
468 offset = em->start + em->len;
469 free_extent_map(em);
470
471 /* Prealloc extent */
472 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
473 if (IS_ERR(em)) {
474 test_err("got an error when we shouldn't have");
475 goto out;
476 }
477 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
478 test_err("expected a real extent, got %llu", em->block_start);
479 goto out;
480 }
481 if (em->start != offset || em->len != sectorsize) {
482 test_err(
483 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
484 offset, sectorsize, em->start, em->len);
485 goto out;
486 }
487 if (em->flags != prealloc_only) {
488 test_err("unexpected flags set, want %lu have %lu",
489 prealloc_only, em->flags);
490 goto out;
491 }
492 if (em->orig_start != em->start) {
493 test_err("wrong orig offset, want %llu, have %llu", em->start,
494 em->orig_start);
495 goto out;
496 }
497 offset = em->start + em->len;
498 free_extent_map(em);
499
500 /* The next 3 are a half written prealloc extent */
501 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
502 if (IS_ERR(em)) {
503 test_err("got an error when we shouldn't have");
504 goto out;
505 }
506 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
507 test_err("expected a real extent, got %llu", em->block_start);
508 goto out;
509 }
510 if (em->start != offset || em->len != sectorsize) {
511 test_err(
512 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
513 offset, sectorsize, em->start, em->len);
514 goto out;
515 }
516 if (em->flags != prealloc_only) {
517 test_err("unexpected flags set, want %lu have %lu",
518 prealloc_only, em->flags);
519 goto out;
520 }
521 if (em->orig_start != em->start) {
522 test_err("wrong orig offset, want %llu, have %llu", em->start,
523 em->orig_start);
524 goto out;
525 }
526 disk_bytenr = em->block_start;
527 orig_start = em->start;
528 offset = em->start + em->len;
529 free_extent_map(em);
530
531 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
532 if (IS_ERR(em)) {
533 test_err("got an error when we shouldn't have");
534 goto out;
535 }
536 if (em->block_start >= EXTENT_MAP_HOLE) {
537 test_err("expected a real extent, got %llu", em->block_start);
538 goto out;
539 }
540 if (em->start != offset || em->len != sectorsize) {
541 test_err(
542 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
543 offset, sectorsize, em->start, em->len);
544 goto out;
545 }
546 if (em->flags != 0) {
547 test_err("unexpected flags set, want 0 have %lu", em->flags);
548 goto out;
549 }
550 if (em->orig_start != orig_start) {
551 test_err("unexpected orig offset, wanted %llu, have %llu",
552 orig_start, em->orig_start);
553 goto out;
554 }
555 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
556 test_err("unexpected block start, wanted %llu, have %llu",
557 disk_bytenr + (em->start - em->orig_start),
558 em->block_start);
559 goto out;
560 }
561 offset = em->start + em->len;
562 free_extent_map(em);
563
564 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
565 if (IS_ERR(em)) {
566 test_err("got an error when we shouldn't have");
567 goto out;
568 }
569 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
570 test_err("expected a real extent, got %llu", em->block_start);
571 goto out;
572 }
573 if (em->start != offset || em->len != 2 * sectorsize) {
574 test_err(
575 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
576 offset, 2 * sectorsize, em->start, em->len);
577 goto out;
578 }
579 if (em->flags != prealloc_only) {
580 test_err("unexpected flags set, want %lu have %lu",
581 prealloc_only, em->flags);
582 goto out;
583 }
584 if (em->orig_start != orig_start) {
585 test_err("wrong orig offset, want %llu, have %llu", orig_start,
586 em->orig_start);
587 goto out;
588 }
589 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
590 test_err("unexpected block start, wanted %llu, have %llu",
591 disk_bytenr + (em->start - em->orig_start),
592 em->block_start);
593 goto out;
594 }
595 offset = em->start + em->len;
596 free_extent_map(em);
597
598 /* Now for the compressed extent */
599 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
600 if (IS_ERR(em)) {
601 test_err("got an error when we shouldn't have");
602 goto out;
603 }
604 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
605 test_err("expected a real extent, got %llu", em->block_start);
606 goto out;
607 }
608 if (em->start != offset || em->len != 2 * sectorsize) {
609 test_err(
610 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
611 offset, 2 * sectorsize, em->start, em->len);
612 goto out;
613 }
614 if (em->flags != compressed_only) {
615 test_err("unexpected flags set, want %lu have %lu",
616 compressed_only, em->flags);
617 goto out;
618 }
619 if (em->orig_start != em->start) {
620 test_err("wrong orig offset, want %llu, have %llu",
621 em->start, em->orig_start);
622 goto out;
623 }
624 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
625 test_err("unexpected compress type, wanted %d, got %d",
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(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
634 if (IS_ERR(em)) {
635 test_err("got an error when we shouldn't have");
636 goto out;
637 }
638 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
639 test_err("expected a real extent, got %llu", em->block_start);
640 goto out;
641 }
642 if (em->start != offset || em->len != sectorsize) {
643 test_err(
644 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
645 offset, sectorsize, em->start, em->len);
646 goto out;
647 }
648 if (em->flags != compressed_only) {
649 test_err("unexpected flags set, want %lu have %lu",
650 compressed_only, em->flags);
651 goto out;
652 }
653 if (em->orig_start != em->start) {
654 test_err("wrong orig offset, want %llu, have %llu",
655 em->start, em->orig_start);
656 goto out;
657 }
658 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
659 test_err("unexpected compress type, wanted %d, got %d",
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(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
669 if (IS_ERR(em)) {
670 test_err("got an error when we shouldn't have");
671 goto out;
672 }
673 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
674 test_err("expected a real extent, got %llu", em->block_start);
675 goto out;
676 }
677 if (em->start != offset || em->len != sectorsize) {
678 test_err(
679 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
680 offset, sectorsize, em->start, em->len);
681 goto out;
682 }
683 if (em->flags != 0) {
684 test_err("unexpected flags set, want 0 have %lu", em->flags);
685 goto out;
686 }
687 if (em->orig_start != em->start) {
688 test_err("wrong orig offset, want %llu, have %llu", em->start,
689 em->orig_start);
690 goto out;
691 }
692 offset = em->start + em->len;
693 free_extent_map(em);
694
695 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
696 if (IS_ERR(em)) {
697 test_err("got an error when we shouldn't have");
698 goto out;
699 }
700 if (em->block_start != disk_bytenr) {
701 test_err("block start does not match, want %llu got %llu",
702 disk_bytenr, em->block_start);
703 goto out;
704 }
705 if (em->start != offset || em->len != 2 * sectorsize) {
706 test_err(
707 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
708 offset, 2 * sectorsize, em->start, em->len);
709 goto out;
710 }
711 if (em->flags != compressed_only) {
712 test_err("unexpected flags set, want %lu have %lu",
713 compressed_only, em->flags);
714 goto out;
715 }
716 if (em->orig_start != orig_start) {
717 test_err("wrong orig offset, want %llu, have %llu",
718 em->start, orig_start);
719 goto out;
720 }
721 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
722 test_err("unexpected compress type, wanted %d, got %d",
723 BTRFS_COMPRESS_ZLIB, em->compress_type);
724 goto out;
725 }
726 offset = em->start + em->len;
727 free_extent_map(em);
728
729 /* A hole between regular extents but no hole extent */
730 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6,
731 sectorsize, 0);
732 if (IS_ERR(em)) {
733 test_err("got an error when we shouldn't have");
734 goto out;
735 }
736 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
737 test_err("expected a real extent, got %llu", em->block_start);
738 goto out;
739 }
740 if (em->start != offset || em->len != sectorsize) {
741 test_err(
742 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
743 offset, sectorsize, em->start, em->len);
744 goto out;
745 }
746 if (em->flags != 0) {
747 test_err("unexpected flags set, want 0 have %lu", em->flags);
748 goto out;
749 }
750 if (em->orig_start != em->start) {
751 test_err("wrong orig offset, want %llu, have %llu", em->start,
752 em->orig_start);
753 goto out;
754 }
755 offset = em->start + em->len;
756 free_extent_map(em);
757
758 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M, 0);
759 if (IS_ERR(em)) {
760 test_err("got an error when we shouldn't have");
761 goto out;
762 }
763 if (em->block_start != EXTENT_MAP_HOLE) {
764 test_err("expected a hole extent, got %llu", em->block_start);
765 goto out;
766 }
767 /*
768 * Currently we just return a length that we requested rather than the
769 * length of the actual hole, if this changes we'll have to change this
770 * test.
771 */
772 if (em->start != offset || em->len != 3 * sectorsize) {
773 test_err(
774 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
775 offset, 3 * sectorsize, em->start, em->len);
776 goto out;
777 }
778 if (em->flags != vacancy_only) {
779 test_err("unexpected flags set, want %lu have %lu",
780 vacancy_only, em->flags);
781 goto out;
782 }
783 if (em->orig_start != em->start) {
784 test_err("wrong orig offset, want %llu, have %llu", em->start,
785 em->orig_start);
786 goto out;
787 }
788 offset = em->start + em->len;
789 free_extent_map(em);
790
791 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
792 if (IS_ERR(em)) {
793 test_err("got an error when we shouldn't have");
794 goto out;
795 }
796 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
797 test_err("expected a real extent, got %llu", em->block_start);
798 goto out;
799 }
800 if (em->start != offset || em->len != sectorsize) {
801 test_err(
802 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
803 offset, sectorsize, em->start, em->len);
804 goto out;
805 }
806 if (em->flags != 0) {
807 test_err("unexpected flags set, want 0 have %lu", em->flags);
808 goto out;
809 }
810 if (em->orig_start != em->start) {
811 test_err("wrong orig offset, want %llu, have %llu", em->start,
812 em->orig_start);
813 goto out;
814 }
815 ret = 0;
816out:
817 if (!IS_ERR(em))
818 free_extent_map(em);
819 iput(inode);
820 btrfs_free_dummy_root(root);
821 btrfs_free_dummy_fs_info(fs_info);
822 return ret;
823}
824
825static int test_hole_first(u32 sectorsize, u32 nodesize)
826{
827 struct btrfs_fs_info *fs_info = NULL;
828 struct inode *inode = NULL;
829 struct btrfs_root *root = NULL;
830 struct extent_map *em = NULL;
831 int ret = -ENOMEM;
832
833 test_msg("running hole first btrfs_get_extent test");
834
835 inode = btrfs_new_test_inode();
836 if (!inode) {
837 test_std_err(TEST_ALLOC_INODE);
838 return ret;
839 }
840
841 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
842 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
843 BTRFS_I(inode)->location.offset = 0;
844
845 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
846 if (!fs_info) {
847 test_std_err(TEST_ALLOC_FS_INFO);
848 goto out;
849 }
850
851 root = btrfs_alloc_dummy_root(fs_info);
852 if (IS_ERR(root)) {
853 test_std_err(TEST_ALLOC_ROOT);
854 goto out;
855 }
856
857 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
858 if (!root->node) {
859 test_std_err(TEST_ALLOC_ROOT);
860 goto out;
861 }
862
863 btrfs_set_header_nritems(root->node, 0);
864 btrfs_set_header_level(root->node, 0);
865 BTRFS_I(inode)->root = root;
866 ret = -EINVAL;
867
868 /*
869 * Need a blank inode item here just so we don't confuse
870 * btrfs_get_extent.
871 */
872 insert_inode_item_key(root);
873 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
874 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
875 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize, 0);
876 if (IS_ERR(em)) {
877 test_err("got an error when we shouldn't have");
878 goto out;
879 }
880 if (em->block_start != EXTENT_MAP_HOLE) {
881 test_err("expected a hole, got %llu", em->block_start);
882 goto out;
883 }
884 if (em->start != 0 || em->len != sectorsize) {
885 test_err(
886 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
887 sectorsize, em->start, em->len);
888 goto out;
889 }
890 if (em->flags != vacancy_only) {
891 test_err("wrong flags, wanted %lu, have %lu", vacancy_only,
892 em->flags);
893 goto out;
894 }
895 free_extent_map(em);
896
897 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize,
898 2 * sectorsize, 0);
899 if (IS_ERR(em)) {
900 test_err("got an error when we shouldn't have");
901 goto out;
902 }
903 if (em->block_start != sectorsize) {
904 test_err("expected a real extent, got %llu", em->block_start);
905 goto out;
906 }
907 if (em->start != sectorsize || em->len != sectorsize) {
908 test_err(
909 "unexpected extent wanted start %u len %u, got start %llu len %llu",
910 sectorsize, sectorsize, em->start, em->len);
911 goto out;
912 }
913 if (em->flags != 0) {
914 test_err("unexpected flags set, wanted 0 got %lu",
915 em->flags);
916 goto out;
917 }
918 ret = 0;
919out:
920 if (!IS_ERR(em))
921 free_extent_map(em);
922 iput(inode);
923 btrfs_free_dummy_root(root);
924 btrfs_free_dummy_fs_info(fs_info);
925 return ret;
926}
927
928static int test_extent_accounting(u32 sectorsize, u32 nodesize)
929{
930 struct btrfs_fs_info *fs_info = NULL;
931 struct inode *inode = NULL;
932 struct btrfs_root *root = NULL;
933 int ret = -ENOMEM;
934
935 test_msg("running outstanding_extents tests");
936
937 inode = btrfs_new_test_inode();
938 if (!inode) {
939 test_std_err(TEST_ALLOC_INODE);
940 return ret;
941 }
942
943 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
944 if (!fs_info) {
945 test_std_err(TEST_ALLOC_FS_INFO);
946 goto out;
947 }
948
949 root = btrfs_alloc_dummy_root(fs_info);
950 if (IS_ERR(root)) {
951 test_std_err(TEST_ALLOC_ROOT);
952 goto out;
953 }
954
955 BTRFS_I(inode)->root = root;
956 btrfs_test_inode_set_ops(inode);
957
958 /* [BTRFS_MAX_EXTENT_SIZE] */
959 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0,
960 NULL);
961 if (ret) {
962 test_err("btrfs_set_extent_delalloc returned %d", ret);
963 goto out;
964 }
965 if (BTRFS_I(inode)->outstanding_extents != 1) {
966 ret = -EINVAL;
967 test_err("miscount, wanted 1, got %u",
968 BTRFS_I(inode)->outstanding_extents);
969 goto out;
970 }
971
972 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
973 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
974 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
975 0, NULL);
976 if (ret) {
977 test_err("btrfs_set_extent_delalloc returned %d", ret);
978 goto out;
979 }
980 if (BTRFS_I(inode)->outstanding_extents != 2) {
981 ret = -EINVAL;
982 test_err("miscount, wanted 2, got %u",
983 BTRFS_I(inode)->outstanding_extents);
984 goto out;
985 }
986
987 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
988 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
989 BTRFS_MAX_EXTENT_SIZE >> 1,
990 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
991 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL);
992 if (ret) {
993 test_err("clear_extent_bit returned %d", ret);
994 goto out;
995 }
996 if (BTRFS_I(inode)->outstanding_extents != 2) {
997 ret = -EINVAL;
998 test_err("miscount, wanted 2, got %u",
999 BTRFS_I(inode)->outstanding_extents);
1000 goto out;
1001 }
1002
1003 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
1004 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
1005 (BTRFS_MAX_EXTENT_SIZE >> 1)
1006 + sectorsize - 1,
1007 0, NULL);
1008 if (ret) {
1009 test_err("btrfs_set_extent_delalloc returned %d", ret);
1010 goto out;
1011 }
1012 if (BTRFS_I(inode)->outstanding_extents != 2) {
1013 ret = -EINVAL;
1014 test_err("miscount, wanted 2, got %u",
1015 BTRFS_I(inode)->outstanding_extents);
1016 goto out;
1017 }
1018
1019 /*
1020 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1021 */
1022 ret = btrfs_set_extent_delalloc(inode,
1023 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1024 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1025 0, NULL);
1026 if (ret) {
1027 test_err("btrfs_set_extent_delalloc returned %d", ret);
1028 goto out;
1029 }
1030 if (BTRFS_I(inode)->outstanding_extents != 4) {
1031 ret = -EINVAL;
1032 test_err("miscount, wanted 4, got %u",
1033 BTRFS_I(inode)->outstanding_extents);
1034 goto out;
1035 }
1036
1037 /*
1038 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1039 */
1040 ret = btrfs_set_extent_delalloc(inode,
1041 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1042 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1043 if (ret) {
1044 test_err("btrfs_set_extent_delalloc returned %d", ret);
1045 goto out;
1046 }
1047 if (BTRFS_I(inode)->outstanding_extents != 3) {
1048 ret = -EINVAL;
1049 test_err("miscount, wanted 3, got %u",
1050 BTRFS_I(inode)->outstanding_extents);
1051 goto out;
1052 }
1053
1054 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1055 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1056 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1057 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1058 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL);
1059 if (ret) {
1060 test_err("clear_extent_bit returned %d", ret);
1061 goto out;
1062 }
1063 if (BTRFS_I(inode)->outstanding_extents != 4) {
1064 ret = -EINVAL;
1065 test_err("miscount, wanted 4, got %u",
1066 BTRFS_I(inode)->outstanding_extents);
1067 goto out;
1068 }
1069
1070 /*
1071 * Refill the hole again just for good measure, because I thought it
1072 * might fail and I'd rather satisfy my paranoia at this point.
1073 */
1074 ret = btrfs_set_extent_delalloc(inode,
1075 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1076 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1077 if (ret) {
1078 test_err("btrfs_set_extent_delalloc returned %d", ret);
1079 goto out;
1080 }
1081 if (BTRFS_I(inode)->outstanding_extents != 3) {
1082 ret = -EINVAL;
1083 test_err("miscount, wanted 3, got %u",
1084 BTRFS_I(inode)->outstanding_extents);
1085 goto out;
1086 }
1087
1088 /* Empty */
1089 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1090 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL);
1091 if (ret) {
1092 test_err("clear_extent_bit returned %d", ret);
1093 goto out;
1094 }
1095 if (BTRFS_I(inode)->outstanding_extents) {
1096 ret = -EINVAL;
1097 test_err("miscount, wanted 0, got %u",
1098 BTRFS_I(inode)->outstanding_extents);
1099 goto out;
1100 }
1101 ret = 0;
1102out:
1103 if (ret)
1104 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1105 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL);
1106 iput(inode);
1107 btrfs_free_dummy_root(root);
1108 btrfs_free_dummy_fs_info(fs_info);
1109 return ret;
1110}
1111
1112int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1113{
1114 int ret;
1115
1116 test_msg("running inode tests");
1117
1118 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1119 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1120
1121 ret = test_btrfs_get_extent(sectorsize, nodesize);
1122 if (ret)
1123 return ret;
1124 ret = test_hole_first(sectorsize, nodesize);
1125 if (ret)
1126 return ret;
1127 return test_extent_accounting(sectorsize, nodesize);
1128}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6#include <linux/types.h>
7#include "btrfs-tests.h"
8#include "../ctree.h"
9#include "../btrfs_inode.h"
10#include "../disk-io.h"
11#include "../extent_io.h"
12#include "../volumes.h"
13#include "../compression.h"
14
15static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
16 u64 ram_bytes, u64 offset, u64 disk_bytenr,
17 u64 disk_len, u32 type, u8 compression, int slot)
18{
19 struct btrfs_path path;
20 struct btrfs_file_extent_item *fi;
21 struct extent_buffer *leaf = root->node;
22 struct btrfs_key key;
23 u32 value_len = sizeof(struct btrfs_file_extent_item);
24
25 if (type == BTRFS_FILE_EXTENT_INLINE)
26 value_len += len;
27 memset(&path, 0, sizeof(path));
28
29 path.nodes[0] = leaf;
30 path.slots[0] = slot;
31
32 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
33 key.type = BTRFS_EXTENT_DATA_KEY;
34 key.offset = start;
35
36 setup_items_for_insert(root, &path, &key, &value_len, value_len,
37 value_len + sizeof(struct btrfs_item), 1);
38 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
39 btrfs_set_file_extent_generation(leaf, fi, 1);
40 btrfs_set_file_extent_type(leaf, fi, type);
41 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
42 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
43 btrfs_set_file_extent_offset(leaf, fi, offset);
44 btrfs_set_file_extent_num_bytes(leaf, fi, len);
45 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
46 btrfs_set_file_extent_compression(leaf, fi, compression);
47 btrfs_set_file_extent_encryption(leaf, fi, 0);
48 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
49}
50
51static void insert_inode_item_key(struct btrfs_root *root)
52{
53 struct btrfs_path path;
54 struct extent_buffer *leaf = root->node;
55 struct btrfs_key key;
56 u32 value_len = 0;
57
58 memset(&path, 0, sizeof(path));
59
60 path.nodes[0] = leaf;
61 path.slots[0] = 0;
62
63 key.objectid = BTRFS_INODE_ITEM_KEY;
64 key.type = BTRFS_INODE_ITEM_KEY;
65 key.offset = 0;
66
67 setup_items_for_insert(root, &path, &key, &value_len, value_len,
68 value_len + sizeof(struct btrfs_item), 1);
69}
70
71/*
72 * Build the most complicated map of extents the earth has ever seen. We want
73 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
74 * diagram of how the extents will look though this may not be possible we still
75 * want to make sure everything acts normally (the last number is not inclusive)
76 *
77 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
78 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
79 *
80 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
81 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
82 *
83 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
84 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
85 *
86 * [69635-73731][ 73731 - 86019 ][86019-90115]
87 * [ regular ][ hole but no extent][ regular ]
88 */
89static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
90{
91 int slot = 0;
92 u64 disk_bytenr = SZ_1M;
93 u64 offset = 0;
94
95 /* First we want a hole */
96 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
97 slot);
98 slot++;
99 offset += 5;
100
101 /*
102 * Now we want an inline extent, I don't think this is possible but hey
103 * why not? Also keep in mind if we have an inline extent it counts as
104 * the whole first page. If we were to expand it we would have to cow
105 * and we wouldn't have an inline extent anymore.
106 */
107 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
108 slot);
109 slot++;
110 offset = sectorsize;
111
112 /* Now another hole */
113 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
114 slot);
115 slot++;
116 offset += 4;
117
118 /* Now for a regular extent */
119 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
120 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
121 slot++;
122 disk_bytenr += sectorsize;
123 offset += sectorsize - 1;
124
125 /*
126 * Now for 3 extents that were split from a hole punch so we test
127 * offsets properly.
128 */
129 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
130 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
131 slot++;
132 offset += sectorsize;
133 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
134 BTRFS_FILE_EXTENT_REG, 0, slot);
135 slot++;
136 offset += sectorsize;
137 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
138 2 * sectorsize, disk_bytenr, 4 * sectorsize,
139 BTRFS_FILE_EXTENT_REG, 0, slot);
140 slot++;
141 offset += 2 * sectorsize;
142 disk_bytenr += 4 * sectorsize;
143
144 /* Now for a unwritten prealloc extent */
145 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
146 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
147 slot++;
148 offset += sectorsize;
149
150 /*
151 * We want to jack up disk_bytenr a little more so the em stuff doesn't
152 * merge our records.
153 */
154 disk_bytenr += 2 * sectorsize;
155
156 /*
157 * Now for a partially written prealloc extent, basically the same as
158 * the hole punch example above. Ram_bytes never changes when you mark
159 * extents written btw.
160 */
161 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
162 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
163 slot++;
164 offset += sectorsize;
165 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
166 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
167 slot);
168 slot++;
169 offset += sectorsize;
170 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
171 2 * sectorsize, disk_bytenr, 4 * sectorsize,
172 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
173 slot++;
174 offset += 2 * sectorsize;
175 disk_bytenr += 4 * sectorsize;
176
177 /* Now a normal compressed extent */
178 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
179 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
180 BTRFS_COMPRESS_ZLIB, slot);
181 slot++;
182 offset += 2 * sectorsize;
183 /* No merges */
184 disk_bytenr += 2 * sectorsize;
185
186 /* Now a split compressed extent */
187 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
188 sectorsize, BTRFS_FILE_EXTENT_REG,
189 BTRFS_COMPRESS_ZLIB, slot);
190 slot++;
191 offset += sectorsize;
192 insert_extent(root, offset, sectorsize, sectorsize, 0,
193 disk_bytenr + sectorsize, sectorsize,
194 BTRFS_FILE_EXTENT_REG, 0, slot);
195 slot++;
196 offset += sectorsize;
197 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
198 2 * sectorsize, disk_bytenr, sectorsize,
199 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
200 slot++;
201 offset += 2 * sectorsize;
202 disk_bytenr += 2 * sectorsize;
203
204 /* Now extents that have a hole but no hole extent */
205 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
206 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
207 slot++;
208 offset += 4 * sectorsize;
209 disk_bytenr += sectorsize;
210 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
211 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
212}
213
214static unsigned long prealloc_only = 0;
215static unsigned long compressed_only = 0;
216static unsigned long vacancy_only = 0;
217
218static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
219{
220 struct btrfs_fs_info *fs_info = NULL;
221 struct inode *inode = NULL;
222 struct btrfs_root *root = NULL;
223 struct extent_map *em = NULL;
224 u64 orig_start;
225 u64 disk_bytenr;
226 u64 offset;
227 int ret = -ENOMEM;
228
229 inode = btrfs_new_test_inode();
230 if (!inode) {
231 test_msg("Couldn't allocate inode\n");
232 return ret;
233 }
234
235 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
236 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
237 BTRFS_I(inode)->location.offset = 0;
238
239 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
240 if (!fs_info) {
241 test_msg("Couldn't allocate dummy fs info\n");
242 goto out;
243 }
244
245 root = btrfs_alloc_dummy_root(fs_info);
246 if (IS_ERR(root)) {
247 test_msg("Couldn't allocate root\n");
248 goto out;
249 }
250
251 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
252 if (!root->node) {
253 test_msg("Couldn't allocate dummy buffer\n");
254 goto out;
255 }
256
257 /*
258 * We will just free a dummy node if it's ref count is 2 so we need an
259 * extra ref so our searches don't accidentally release our page.
260 */
261 extent_buffer_get(root->node);
262 btrfs_set_header_nritems(root->node, 0);
263 btrfs_set_header_level(root->node, 0);
264 ret = -EINVAL;
265
266 /* First with no extents */
267 BTRFS_I(inode)->root = root;
268 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize, 0);
269 if (IS_ERR(em)) {
270 em = NULL;
271 test_msg("Got an error when we shouldn't have\n");
272 goto out;
273 }
274 if (em->block_start != EXTENT_MAP_HOLE) {
275 test_msg("Expected a hole, got %llu\n", em->block_start);
276 goto out;
277 }
278 free_extent_map(em);
279 btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
280
281 /*
282 * All of the magic numbers are based on the mapping setup in
283 * setup_file_extents, so if you change anything there you need to
284 * update the comment and update the expected values below.
285 */
286 setup_file_extents(root, sectorsize);
287
288 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1, 0);
289 if (IS_ERR(em)) {
290 test_msg("Got an error when we shouldn't have\n");
291 goto out;
292 }
293 if (em->block_start != EXTENT_MAP_HOLE) {
294 test_msg("Expected a hole, got %llu\n", em->block_start);
295 goto out;
296 }
297 if (em->start != 0 || em->len != 5) {
298 test_msg("Unexpected extent wanted start 0 len 5, got start "
299 "%llu len %llu\n", em->start, em->len);
300 goto out;
301 }
302 if (em->flags != 0) {
303 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
304 goto out;
305 }
306 offset = em->start + em->len;
307 free_extent_map(em);
308
309 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
310 if (IS_ERR(em)) {
311 test_msg("Got an error when we shouldn't have\n");
312 goto out;
313 }
314 if (em->block_start != EXTENT_MAP_INLINE) {
315 test_msg("Expected an inline, got %llu\n", em->block_start);
316 goto out;
317 }
318
319 if (em->start != offset || em->len != (sectorsize - 5)) {
320 test_msg("Unexpected extent wanted start %llu len 1, got start "
321 "%llu len %llu\n", offset, em->start, em->len);
322 goto out;
323 }
324 if (em->flags != 0) {
325 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
326 goto out;
327 }
328 /*
329 * We don't test anything else for inline since it doesn't get set
330 * unless we have a page for it to write into. Maybe we should change
331 * this?
332 */
333 offset = em->start + em->len;
334 free_extent_map(em);
335
336 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
337 if (IS_ERR(em)) {
338 test_msg("Got an error when we shouldn't have\n");
339 goto out;
340 }
341 if (em->block_start != EXTENT_MAP_HOLE) {
342 test_msg("Expected a hole, got %llu\n", em->block_start);
343 goto out;
344 }
345 if (em->start != offset || em->len != 4) {
346 test_msg("Unexpected extent wanted start %llu len 4, got start "
347 "%llu len %llu\n", offset, em->start, em->len);
348 goto out;
349 }
350 if (em->flags != 0) {
351 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
352 goto out;
353 }
354 offset = em->start + em->len;
355 free_extent_map(em);
356
357 /* Regular extent */
358 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
359 if (IS_ERR(em)) {
360 test_msg("Got an error when we shouldn't have\n");
361 goto out;
362 }
363 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
364 test_msg("Expected a real extent, got %llu\n", em->block_start);
365 goto out;
366 }
367 if (em->start != offset || em->len != sectorsize - 1) {
368 test_msg("Unexpected extent wanted start %llu len 4095, got "
369 "start %llu len %llu\n", offset, em->start, em->len);
370 goto out;
371 }
372 if (em->flags != 0) {
373 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
374 goto out;
375 }
376 if (em->orig_start != em->start) {
377 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
378 em->orig_start);
379 goto out;
380 }
381 offset = em->start + em->len;
382 free_extent_map(em);
383
384 /* The next 3 are split extents */
385 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
386 if (IS_ERR(em)) {
387 test_msg("Got an error when we shouldn't have\n");
388 goto out;
389 }
390 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
391 test_msg("Expected a real extent, got %llu\n", em->block_start);
392 goto out;
393 }
394 if (em->start != offset || em->len != sectorsize) {
395 test_msg("Unexpected extent start %llu len %u, "
396 "got start %llu len %llu\n",
397 offset, sectorsize, em->start, em->len);
398 goto out;
399 }
400 if (em->flags != 0) {
401 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
402 goto out;
403 }
404 if (em->orig_start != em->start) {
405 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
406 em->orig_start);
407 goto out;
408 }
409 disk_bytenr = em->block_start;
410 orig_start = em->start;
411 offset = em->start + em->len;
412 free_extent_map(em);
413
414 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
415 if (IS_ERR(em)) {
416 test_msg("Got an error when we shouldn't have\n");
417 goto out;
418 }
419 if (em->block_start != EXTENT_MAP_HOLE) {
420 test_msg("Expected a hole, got %llu\n", em->block_start);
421 goto out;
422 }
423 if (em->start != offset || em->len != sectorsize) {
424 test_msg("Unexpected extent wanted start %llu len %u, "
425 "got start %llu len %llu\n",
426 offset, sectorsize, em->start, em->len);
427 goto out;
428 }
429 if (em->flags != 0) {
430 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
431 goto out;
432 }
433 offset = em->start + em->len;
434 free_extent_map(em);
435
436 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
437 if (IS_ERR(em)) {
438 test_msg("Got an error when we shouldn't have\n");
439 goto out;
440 }
441 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
442 test_msg("Expected a real extent, got %llu\n", em->block_start);
443 goto out;
444 }
445 if (em->start != offset || em->len != 2 * sectorsize) {
446 test_msg("Unexpected extent wanted start %llu len %u, "
447 "got start %llu len %llu\n",
448 offset, 2 * sectorsize, em->start, em->len);
449 goto out;
450 }
451 if (em->flags != 0) {
452 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
453 goto out;
454 }
455 if (em->orig_start != orig_start) {
456 test_msg("Wrong orig offset, want %llu, have %llu\n",
457 orig_start, em->orig_start);
458 goto out;
459 }
460 disk_bytenr += (em->start - orig_start);
461 if (em->block_start != disk_bytenr) {
462 test_msg("Wrong block start, want %llu, have %llu\n",
463 disk_bytenr, em->block_start);
464 goto out;
465 }
466 offset = em->start + em->len;
467 free_extent_map(em);
468
469 /* Prealloc extent */
470 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
471 if (IS_ERR(em)) {
472 test_msg("Got an error when we shouldn't have\n");
473 goto out;
474 }
475 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
476 test_msg("Expected a real extent, got %llu\n", em->block_start);
477 goto out;
478 }
479 if (em->start != offset || em->len != sectorsize) {
480 test_msg("Unexpected extent wanted start %llu len %u, "
481 "got start %llu len %llu\n",
482 offset, sectorsize, em->start, em->len);
483 goto out;
484 }
485 if (em->flags != prealloc_only) {
486 test_msg("Unexpected flags set, want %lu have %lu\n",
487 prealloc_only, em->flags);
488 goto out;
489 }
490 if (em->orig_start != em->start) {
491 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
492 em->orig_start);
493 goto out;
494 }
495 offset = em->start + em->len;
496 free_extent_map(em);
497
498 /* The next 3 are a half written prealloc extent */
499 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
500 if (IS_ERR(em)) {
501 test_msg("Got an error when we shouldn't have\n");
502 goto out;
503 }
504 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
505 test_msg("Expected a real extent, got %llu\n", em->block_start);
506 goto out;
507 }
508 if (em->start != offset || em->len != sectorsize) {
509 test_msg("Unexpected extent wanted start %llu len %u, "
510 "got start %llu len %llu\n",
511 offset, sectorsize, em->start, em->len);
512 goto out;
513 }
514 if (em->flags != prealloc_only) {
515 test_msg("Unexpected flags set, want %lu have %lu\n",
516 prealloc_only, em->flags);
517 goto out;
518 }
519 if (em->orig_start != em->start) {
520 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
521 em->orig_start);
522 goto out;
523 }
524 disk_bytenr = em->block_start;
525 orig_start = em->start;
526 offset = em->start + em->len;
527 free_extent_map(em);
528
529 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
530 if (IS_ERR(em)) {
531 test_msg("Got an error when we shouldn't have\n");
532 goto out;
533 }
534 if (em->block_start >= EXTENT_MAP_HOLE) {
535 test_msg("Expected a real extent, got %llu\n", em->block_start);
536 goto out;
537 }
538 if (em->start != offset || em->len != sectorsize) {
539 test_msg("Unexpected extent wanted start %llu len %u, "
540 "got start %llu len %llu\n",
541 offset, sectorsize, em->start, em->len);
542 goto out;
543 }
544 if (em->flags != 0) {
545 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
546 goto out;
547 }
548 if (em->orig_start != orig_start) {
549 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
550 orig_start, em->orig_start);
551 goto out;
552 }
553 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
554 test_msg("Unexpected block start, wanted %llu, have %llu\n",
555 disk_bytenr + (em->start - em->orig_start),
556 em->block_start);
557 goto out;
558 }
559 offset = em->start + em->len;
560 free_extent_map(em);
561
562 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
563 if (IS_ERR(em)) {
564 test_msg("Got an error when we shouldn't have\n");
565 goto out;
566 }
567 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
568 test_msg("Expected a real extent, got %llu\n", em->block_start);
569 goto out;
570 }
571 if (em->start != offset || em->len != 2 * sectorsize) {
572 test_msg("Unexpected extent wanted start %llu len %u, "
573 "got start %llu len %llu\n",
574 offset, 2 * sectorsize, em->start, em->len);
575 goto out;
576 }
577 if (em->flags != prealloc_only) {
578 test_msg("Unexpected flags set, want %lu have %lu\n",
579 prealloc_only, em->flags);
580 goto out;
581 }
582 if (em->orig_start != orig_start) {
583 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
584 em->orig_start);
585 goto out;
586 }
587 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
588 test_msg("Unexpected block start, wanted %llu, have %llu\n",
589 disk_bytenr + (em->start - em->orig_start),
590 em->block_start);
591 goto out;
592 }
593 offset = em->start + em->len;
594 free_extent_map(em);
595
596 /* Now for the compressed extent */
597 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
598 if (IS_ERR(em)) {
599 test_msg("Got an error when we shouldn't have\n");
600 goto out;
601 }
602 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
603 test_msg("Expected a real extent, got %llu\n", em->block_start);
604 goto out;
605 }
606 if (em->start != offset || em->len != 2 * sectorsize) {
607 test_msg("Unexpected extent wanted start %llu len %u,"
608 "got start %llu len %llu\n",
609 offset, 2 * sectorsize, em->start, em->len);
610 goto out;
611 }
612 if (em->flags != compressed_only) {
613 test_msg("Unexpected flags set, want %lu have %lu\n",
614 compressed_only, em->flags);
615 goto out;
616 }
617 if (em->orig_start != em->start) {
618 test_msg("Wrong orig offset, want %llu, have %llu\n",
619 em->start, em->orig_start);
620 goto out;
621 }
622 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
623 test_msg("Unexpected compress type, wanted %d, got %d\n",
624 BTRFS_COMPRESS_ZLIB, em->compress_type);
625 goto out;
626 }
627 offset = em->start + em->len;
628 free_extent_map(em);
629
630 /* Split compressed extent */
631 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
632 if (IS_ERR(em)) {
633 test_msg("Got an error when we shouldn't have\n");
634 goto out;
635 }
636 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
637 test_msg("Expected a real extent, got %llu\n", em->block_start);
638 goto out;
639 }
640 if (em->start != offset || em->len != sectorsize) {
641 test_msg("Unexpected extent wanted start %llu len %u,"
642 "got start %llu len %llu\n",
643 offset, sectorsize, em->start, em->len);
644 goto out;
645 }
646 if (em->flags != compressed_only) {
647 test_msg("Unexpected flags set, want %lu have %lu\n",
648 compressed_only, em->flags);
649 goto out;
650 }
651 if (em->orig_start != em->start) {
652 test_msg("Wrong orig offset, want %llu, have %llu\n",
653 em->start, em->orig_start);
654 goto out;
655 }
656 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
657 test_msg("Unexpected compress type, wanted %d, got %d\n",
658 BTRFS_COMPRESS_ZLIB, em->compress_type);
659 goto out;
660 }
661 disk_bytenr = em->block_start;
662 orig_start = em->start;
663 offset = em->start + em->len;
664 free_extent_map(em);
665
666 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
667 if (IS_ERR(em)) {
668 test_msg("Got an error when we shouldn't have\n");
669 goto out;
670 }
671 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
672 test_msg("Expected a real extent, got %llu\n", em->block_start);
673 goto out;
674 }
675 if (em->start != offset || em->len != sectorsize) {
676 test_msg("Unexpected extent wanted start %llu len %u, "
677 "got start %llu len %llu\n",
678 offset, sectorsize, 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(BTRFS_I(inode), NULL, 0, offset, sectorsize, 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 != 2 * sectorsize) {
704 test_msg("Unexpected extent wanted start %llu len %u, "
705 "got start %llu len %llu\n",
706 offset, 2 * sectorsize, 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(BTRFS_I(inode), NULL, 0, offset + 6,
729 sectorsize, 0);
730 if (IS_ERR(em)) {
731 test_msg("Got an error when we shouldn't have\n");
732 goto out;
733 }
734 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
735 test_msg("Expected a real extent, got %llu\n", em->block_start);
736 goto out;
737 }
738 if (em->start != offset || em->len != sectorsize) {
739 test_msg("Unexpected extent wanted start %llu len %u, "
740 "got start %llu len %llu\n",
741 offset, sectorsize, em->start, em->len);
742 goto out;
743 }
744 if (em->flags != 0) {
745 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
746 goto out;
747 }
748 if (em->orig_start != em->start) {
749 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
750 em->orig_start);
751 goto out;
752 }
753 offset = em->start + em->len;
754 free_extent_map(em);
755
756 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M, 0);
757 if (IS_ERR(em)) {
758 test_msg("Got an error when we shouldn't have\n");
759 goto out;
760 }
761 if (em->block_start != EXTENT_MAP_HOLE) {
762 test_msg("Expected a hole extent, got %llu\n", em->block_start);
763 goto out;
764 }
765 /*
766 * Currently we just return a length that we requested rather than the
767 * length of the actual hole, if this changes we'll have to change this
768 * test.
769 */
770 if (em->start != offset || em->len != 3 * sectorsize) {
771 test_msg("Unexpected extent wanted start %llu len %u, "
772 "got start %llu len %llu\n",
773 offset, 3 * sectorsize, em->start, em->len);
774 goto out;
775 }
776 if (em->flags != vacancy_only) {
777 test_msg("Unexpected flags set, want %lu have %lu\n",
778 vacancy_only, em->flags);
779 goto out;
780 }
781 if (em->orig_start != em->start) {
782 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
783 em->orig_start);
784 goto out;
785 }
786 offset = em->start + em->len;
787 free_extent_map(em);
788
789 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
790 if (IS_ERR(em)) {
791 test_msg("Got an error when we shouldn't have\n");
792 goto out;
793 }
794 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
795 test_msg("Expected a real extent, got %llu\n", em->block_start);
796 goto out;
797 }
798 if (em->start != offset || em->len != sectorsize) {
799 test_msg("Unexpected extent wanted start %llu len %u,"
800 "got start %llu len %llu\n",
801 offset, sectorsize, em->start, em->len);
802 goto out;
803 }
804 if (em->flags != 0) {
805 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
806 goto out;
807 }
808 if (em->orig_start != em->start) {
809 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
810 em->orig_start);
811 goto out;
812 }
813 ret = 0;
814out:
815 if (!IS_ERR(em))
816 free_extent_map(em);
817 iput(inode);
818 btrfs_free_dummy_root(root);
819 btrfs_free_dummy_fs_info(fs_info);
820 return ret;
821}
822
823static int test_hole_first(u32 sectorsize, u32 nodesize)
824{
825 struct btrfs_fs_info *fs_info = NULL;
826 struct inode *inode = NULL;
827 struct btrfs_root *root = NULL;
828 struct extent_map *em = NULL;
829 int ret = -ENOMEM;
830
831 inode = btrfs_new_test_inode();
832 if (!inode) {
833 test_msg("Couldn't allocate inode\n");
834 return ret;
835 }
836
837 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
838 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
839 BTRFS_I(inode)->location.offset = 0;
840
841 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
842 if (!fs_info) {
843 test_msg("Couldn't allocate dummy fs info\n");
844 goto out;
845 }
846
847 root = btrfs_alloc_dummy_root(fs_info);
848 if (IS_ERR(root)) {
849 test_msg("Couldn't allocate root\n");
850 goto out;
851 }
852
853 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
854 if (!root->node) {
855 test_msg("Couldn't allocate dummy buffer\n");
856 goto out;
857 }
858
859 extent_buffer_get(root->node);
860 btrfs_set_header_nritems(root->node, 0);
861 btrfs_set_header_level(root->node, 0);
862 BTRFS_I(inode)->root = root;
863 ret = -EINVAL;
864
865 /*
866 * Need a blank inode item here just so we don't confuse
867 * btrfs_get_extent.
868 */
869 insert_inode_item_key(root);
870 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
871 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
872 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize, 0);
873 if (IS_ERR(em)) {
874 test_msg("Got an error when we shouldn't have\n");
875 goto out;
876 }
877 if (em->block_start != EXTENT_MAP_HOLE) {
878 test_msg("Expected a hole, got %llu\n", em->block_start);
879 goto out;
880 }
881 if (em->start != 0 || em->len != sectorsize) {
882 test_msg("Unexpected extent wanted start 0 len %u, "
883 "got start %llu len %llu\n",
884 sectorsize, em->start, em->len);
885 goto out;
886 }
887 if (em->flags != vacancy_only) {
888 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
889 em->flags);
890 goto out;
891 }
892 free_extent_map(em);
893
894 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize,
895 2 * sectorsize, 0);
896 if (IS_ERR(em)) {
897 test_msg("Got an error when we shouldn't have\n");
898 goto out;
899 }
900 if (em->block_start != sectorsize) {
901 test_msg("Expected a real extent, got %llu\n", em->block_start);
902 goto out;
903 }
904 if (em->start != sectorsize || em->len != sectorsize) {
905 test_msg("Unexpected extent wanted start %u len %u, "
906 "got start %llu len %llu\n",
907 sectorsize, sectorsize, em->start, em->len);
908 goto out;
909 }
910 if (em->flags != 0) {
911 test_msg("Unexpected flags set, wanted 0 got %lu\n",
912 em->flags);
913 goto out;
914 }
915 ret = 0;
916out:
917 if (!IS_ERR(em))
918 free_extent_map(em);
919 iput(inode);
920 btrfs_free_dummy_root(root);
921 btrfs_free_dummy_fs_info(fs_info);
922 return ret;
923}
924
925static int test_extent_accounting(u32 sectorsize, u32 nodesize)
926{
927 struct btrfs_fs_info *fs_info = NULL;
928 struct inode *inode = NULL;
929 struct btrfs_root *root = NULL;
930 int ret = -ENOMEM;
931
932 inode = btrfs_new_test_inode();
933 if (!inode) {
934 test_msg("Couldn't allocate inode\n");
935 return ret;
936 }
937
938 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
939 if (!fs_info) {
940 test_msg("Couldn't allocate dummy fs info\n");
941 goto out;
942 }
943
944 root = btrfs_alloc_dummy_root(fs_info);
945 if (IS_ERR(root)) {
946 test_msg("Couldn't allocate root\n");
947 goto out;
948 }
949
950 BTRFS_I(inode)->root = root;
951 btrfs_test_inode_set_ops(inode);
952
953 /* [BTRFS_MAX_EXTENT_SIZE] */
954 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0,
955 NULL, 0);
956 if (ret) {
957 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
958 goto out;
959 }
960 if (BTRFS_I(inode)->outstanding_extents != 1) {
961 ret = -EINVAL;
962 test_msg("Miscount, wanted 1, got %u\n",
963 BTRFS_I(inode)->outstanding_extents);
964 goto out;
965 }
966
967 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
968 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
969 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
970 0, NULL, 0);
971 if (ret) {
972 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
973 goto out;
974 }
975 if (BTRFS_I(inode)->outstanding_extents != 2) {
976 ret = -EINVAL;
977 test_msg("Miscount, wanted 2, got %u\n",
978 BTRFS_I(inode)->outstanding_extents);
979 goto out;
980 }
981
982 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
983 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
984 BTRFS_MAX_EXTENT_SIZE >> 1,
985 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
986 EXTENT_DELALLOC | EXTENT_DIRTY |
987 EXTENT_UPTODATE, 0, 0, NULL);
988 if (ret) {
989 test_msg("clear_extent_bit 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][sectorsize] */
1000 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
1001 (BTRFS_MAX_EXTENT_SIZE >> 1)
1002 + sectorsize - 1,
1003 0, NULL, 0);
1004 if (ret) {
1005 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1006 goto out;
1007 }
1008 if (BTRFS_I(inode)->outstanding_extents != 2) {
1009 ret = -EINVAL;
1010 test_msg("Miscount, wanted 2, got %u\n",
1011 BTRFS_I(inode)->outstanding_extents);
1012 goto out;
1013 }
1014
1015 /*
1016 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1017 */
1018 ret = btrfs_set_extent_delalloc(inode,
1019 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1020 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1021 0, NULL, 0);
1022 if (ret) {
1023 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1024 goto out;
1025 }
1026 if (BTRFS_I(inode)->outstanding_extents != 4) {
1027 ret = -EINVAL;
1028 test_msg("Miscount, wanted 4, got %u\n",
1029 BTRFS_I(inode)->outstanding_extents);
1030 goto out;
1031 }
1032
1033 /*
1034 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1035 */
1036 ret = btrfs_set_extent_delalloc(inode,
1037 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1038 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
1039 if (ret) {
1040 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1041 goto out;
1042 }
1043 if (BTRFS_I(inode)->outstanding_extents != 3) {
1044 ret = -EINVAL;
1045 test_msg("Miscount, wanted 3, got %u\n",
1046 BTRFS_I(inode)->outstanding_extents);
1047 goto out;
1048 }
1049
1050 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1051 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1052 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1053 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1054 EXTENT_DIRTY | EXTENT_DELALLOC |
1055 EXTENT_UPTODATE, 0, 0, NULL);
1056 if (ret) {
1057 test_msg("clear_extent_bit returned %d\n", ret);
1058 goto out;
1059 }
1060 if (BTRFS_I(inode)->outstanding_extents != 4) {
1061 ret = -EINVAL;
1062 test_msg("Miscount, wanted 4, got %u\n",
1063 BTRFS_I(inode)->outstanding_extents);
1064 goto out;
1065 }
1066
1067 /*
1068 * Refill the hole again just for good measure, because I thought it
1069 * might fail and I'd rather satisfy my paranoia at this point.
1070 */
1071 ret = btrfs_set_extent_delalloc(inode,
1072 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1073 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
1074 if (ret) {
1075 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1076 goto out;
1077 }
1078 if (BTRFS_I(inode)->outstanding_extents != 3) {
1079 ret = -EINVAL;
1080 test_msg("Miscount, wanted 3, got %u\n",
1081 BTRFS_I(inode)->outstanding_extents);
1082 goto out;
1083 }
1084
1085 /* Empty */
1086 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1087 EXTENT_DIRTY | EXTENT_DELALLOC |
1088 EXTENT_UPTODATE, 0, 0, NULL);
1089 if (ret) {
1090 test_msg("clear_extent_bit returned %d\n", ret);
1091 goto out;
1092 }
1093 if (BTRFS_I(inode)->outstanding_extents) {
1094 ret = -EINVAL;
1095 test_msg("Miscount, wanted 0, got %u\n",
1096 BTRFS_I(inode)->outstanding_extents);
1097 goto out;
1098 }
1099 ret = 0;
1100out:
1101 if (ret)
1102 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1103 EXTENT_DIRTY | EXTENT_DELALLOC |
1104 EXTENT_UPTODATE, 0, 0, NULL);
1105 iput(inode);
1106 btrfs_free_dummy_root(root);
1107 btrfs_free_dummy_fs_info(fs_info);
1108 return ret;
1109}
1110
1111int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1112{
1113 int ret;
1114
1115 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1116 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1117
1118 test_msg("Running btrfs_get_extent tests\n");
1119 ret = test_btrfs_get_extent(sectorsize, nodesize);
1120 if (ret)
1121 return ret;
1122 test_msg("Running hole first btrfs_get_extent test\n");
1123 ret = test_hole_first(sectorsize, nodesize);
1124 if (ret)
1125 return ret;
1126 test_msg("Running outstanding_extents tests\n");
1127 return test_extent_accounting(sectorsize, nodesize);
1128}