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