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