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