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