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 inode = btrfs_new_test_inode();
230 if (!inode) {
231 test_msg("Couldn't allocate inode\n");
232 return ret;
233 }
234
235 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
236 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
237 BTRFS_I(inode)->location.offset = 0;
238
239 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
240 if (!fs_info) {
241 test_msg("Couldn't allocate dummy fs info\n");
242 goto out;
243 }
244
245 root = btrfs_alloc_dummy_root(fs_info);
246 if (IS_ERR(root)) {
247 test_msg("Couldn't allocate root\n");
248 goto out;
249 }
250
251 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
252 if (!root->node) {
253 test_msg("Couldn't allocate dummy buffer\n");
254 goto out;
255 }
256
257 /*
258 * We will just free a dummy node if it's ref count is 2 so we need an
259 * extra ref so our searches don't accidentally release our page.
260 */
261 extent_buffer_get(root->node);
262 btrfs_set_header_nritems(root->node, 0);
263 btrfs_set_header_level(root->node, 0);
264 ret = -EINVAL;
265
266 /* First with no extents */
267 BTRFS_I(inode)->root = root;
268 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize, 0);
269 if (IS_ERR(em)) {
270 em = NULL;
271 test_msg("Got an error when we shouldn't have\n");
272 goto out;
273 }
274 if (em->block_start != EXTENT_MAP_HOLE) {
275 test_msg("Expected a hole, got %llu\n", em->block_start);
276 goto out;
277 }
278 free_extent_map(em);
279 btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
280
281 /*
282 * All of the magic numbers are based on the mapping setup in
283 * setup_file_extents, so if you change anything there you need to
284 * update the comment and update the expected values below.
285 */
286 setup_file_extents(root, sectorsize);
287
288 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1, 0);
289 if (IS_ERR(em)) {
290 test_msg("Got an error when we shouldn't have\n");
291 goto out;
292 }
293 if (em->block_start != EXTENT_MAP_HOLE) {
294 test_msg("Expected a hole, got %llu\n", em->block_start);
295 goto out;
296 }
297 if (em->start != 0 || em->len != 5) {
298 test_msg("Unexpected extent wanted start 0 len 5, got start "
299 "%llu len %llu\n", em->start, em->len);
300 goto out;
301 }
302 if (em->flags != 0) {
303 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
304 goto out;
305 }
306 offset = em->start + em->len;
307 free_extent_map(em);
308
309 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
310 if (IS_ERR(em)) {
311 test_msg("Got an error when we shouldn't have\n");
312 goto out;
313 }
314 if (em->block_start != EXTENT_MAP_INLINE) {
315 test_msg("Expected an inline, got %llu\n", em->block_start);
316 goto out;
317 }
318
319 if (em->start != offset || em->len != (sectorsize - 5)) {
320 test_msg("Unexpected extent wanted start %llu len 1, got start "
321 "%llu len %llu\n", offset, em->start, em->len);
322 goto out;
323 }
324 if (em->flags != 0) {
325 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
326 goto out;
327 }
328 /*
329 * We don't test anything else for inline since it doesn't get set
330 * unless we have a page for it to write into. Maybe we should change
331 * this?
332 */
333 offset = em->start + em->len;
334 free_extent_map(em);
335
336 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
337 if (IS_ERR(em)) {
338 test_msg("Got an error when we shouldn't have\n");
339 goto out;
340 }
341 if (em->block_start != EXTENT_MAP_HOLE) {
342 test_msg("Expected a hole, got %llu\n", em->block_start);
343 goto out;
344 }
345 if (em->start != offset || em->len != 4) {
346 test_msg("Unexpected extent wanted start %llu len 4, got start "
347 "%llu len %llu\n", offset, em->start, em->len);
348 goto out;
349 }
350 if (em->flags != 0) {
351 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
352 goto out;
353 }
354 offset = em->start + em->len;
355 free_extent_map(em);
356
357 /* Regular extent */
358 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
359 if (IS_ERR(em)) {
360 test_msg("Got an error when we shouldn't have\n");
361 goto out;
362 }
363 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
364 test_msg("Expected a real extent, got %llu\n", em->block_start);
365 goto out;
366 }
367 if (em->start != offset || em->len != sectorsize - 1) {
368 test_msg("Unexpected extent wanted start %llu len 4095, got "
369 "start %llu len %llu\n", offset, em->start, em->len);
370 goto out;
371 }
372 if (em->flags != 0) {
373 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
374 goto out;
375 }
376 if (em->orig_start != em->start) {
377 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
378 em->orig_start);
379 goto out;
380 }
381 offset = em->start + em->len;
382 free_extent_map(em);
383
384 /* The next 3 are split extents */
385 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
386 if (IS_ERR(em)) {
387 test_msg("Got an error when we shouldn't have\n");
388 goto out;
389 }
390 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
391 test_msg("Expected a real extent, got %llu\n", em->block_start);
392 goto out;
393 }
394 if (em->start != offset || em->len != sectorsize) {
395 test_msg("Unexpected extent start %llu len %u, "
396 "got start %llu len %llu\n",
397 offset, sectorsize, em->start, em->len);
398 goto out;
399 }
400 if (em->flags != 0) {
401 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
402 goto out;
403 }
404 if (em->orig_start != em->start) {
405 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
406 em->orig_start);
407 goto out;
408 }
409 disk_bytenr = em->block_start;
410 orig_start = em->start;
411 offset = em->start + em->len;
412 free_extent_map(em);
413
414 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
415 if (IS_ERR(em)) {
416 test_msg("Got an error when we shouldn't have\n");
417 goto out;
418 }
419 if (em->block_start != EXTENT_MAP_HOLE) {
420 test_msg("Expected a hole, got %llu\n", em->block_start);
421 goto out;
422 }
423 if (em->start != offset || em->len != sectorsize) {
424 test_msg("Unexpected extent wanted start %llu len %u, "
425 "got start %llu len %llu\n",
426 offset, sectorsize, em->start, em->len);
427 goto out;
428 }
429 if (em->flags != 0) {
430 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
431 goto out;
432 }
433 offset = em->start + em->len;
434 free_extent_map(em);
435
436 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
437 if (IS_ERR(em)) {
438 test_msg("Got an error when we shouldn't have\n");
439 goto out;
440 }
441 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
442 test_msg("Expected a real extent, got %llu\n", em->block_start);
443 goto out;
444 }
445 if (em->start != offset || em->len != 2 * sectorsize) {
446 test_msg("Unexpected extent wanted start %llu len %u, "
447 "got start %llu len %llu\n",
448 offset, 2 * sectorsize, em->start, em->len);
449 goto out;
450 }
451 if (em->flags != 0) {
452 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
453 goto out;
454 }
455 if (em->orig_start != orig_start) {
456 test_msg("Wrong orig offset, want %llu, have %llu\n",
457 orig_start, em->orig_start);
458 goto out;
459 }
460 disk_bytenr += (em->start - orig_start);
461 if (em->block_start != disk_bytenr) {
462 test_msg("Wrong block start, want %llu, have %llu\n",
463 disk_bytenr, em->block_start);
464 goto out;
465 }
466 offset = em->start + em->len;
467 free_extent_map(em);
468
469 /* Prealloc extent */
470 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
471 if (IS_ERR(em)) {
472 test_msg("Got an error when we shouldn't have\n");
473 goto out;
474 }
475 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
476 test_msg("Expected a real extent, got %llu\n", em->block_start);
477 goto out;
478 }
479 if (em->start != offset || em->len != sectorsize) {
480 test_msg("Unexpected extent wanted start %llu len %u, "
481 "got start %llu len %llu\n",
482 offset, sectorsize, em->start, em->len);
483 goto out;
484 }
485 if (em->flags != prealloc_only) {
486 test_msg("Unexpected flags set, want %lu have %lu\n",
487 prealloc_only, em->flags);
488 goto out;
489 }
490 if (em->orig_start != em->start) {
491 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
492 em->orig_start);
493 goto out;
494 }
495 offset = em->start + em->len;
496 free_extent_map(em);
497
498 /* The next 3 are a half written prealloc extent */
499 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
500 if (IS_ERR(em)) {
501 test_msg("Got an error when we shouldn't have\n");
502 goto out;
503 }
504 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
505 test_msg("Expected a real extent, got %llu\n", em->block_start);
506 goto out;
507 }
508 if (em->start != offset || em->len != sectorsize) {
509 test_msg("Unexpected extent wanted start %llu len %u, "
510 "got start %llu len %llu\n",
511 offset, sectorsize, em->start, em->len);
512 goto out;
513 }
514 if (em->flags != prealloc_only) {
515 test_msg("Unexpected flags set, want %lu have %lu\n",
516 prealloc_only, em->flags);
517 goto out;
518 }
519 if (em->orig_start != em->start) {
520 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
521 em->orig_start);
522 goto out;
523 }
524 disk_bytenr = em->block_start;
525 orig_start = em->start;
526 offset = em->start + em->len;
527 free_extent_map(em);
528
529 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
530 if (IS_ERR(em)) {
531 test_msg("Got an error when we shouldn't have\n");
532 goto out;
533 }
534 if (em->block_start >= EXTENT_MAP_HOLE) {
535 test_msg("Expected a real extent, got %llu\n", em->block_start);
536 goto out;
537 }
538 if (em->start != offset || em->len != sectorsize) {
539 test_msg("Unexpected extent wanted start %llu len %u, "
540 "got start %llu len %llu\n",
541 offset, sectorsize, em->start, em->len);
542 goto out;
543 }
544 if (em->flags != 0) {
545 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
546 goto out;
547 }
548 if (em->orig_start != orig_start) {
549 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
550 orig_start, em->orig_start);
551 goto out;
552 }
553 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
554 test_msg("Unexpected block start, wanted %llu, have %llu\n",
555 disk_bytenr + (em->start - em->orig_start),
556 em->block_start);
557 goto out;
558 }
559 offset = em->start + em->len;
560 free_extent_map(em);
561
562 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
563 if (IS_ERR(em)) {
564 test_msg("Got an error when we shouldn't have\n");
565 goto out;
566 }
567 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
568 test_msg("Expected a real extent, got %llu\n", em->block_start);
569 goto out;
570 }
571 if (em->start != offset || em->len != 2 * sectorsize) {
572 test_msg("Unexpected extent wanted start %llu len %u, "
573 "got start %llu len %llu\n",
574 offset, 2 * sectorsize, em->start, em->len);
575 goto out;
576 }
577 if (em->flags != prealloc_only) {
578 test_msg("Unexpected flags set, want %lu have %lu\n",
579 prealloc_only, em->flags);
580 goto out;
581 }
582 if (em->orig_start != orig_start) {
583 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
584 em->orig_start);
585 goto out;
586 }
587 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
588 test_msg("Unexpected block start, wanted %llu, have %llu\n",
589 disk_bytenr + (em->start - em->orig_start),
590 em->block_start);
591 goto out;
592 }
593 offset = em->start + em->len;
594 free_extent_map(em);
595
596 /* Now for the compressed extent */
597 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
598 if (IS_ERR(em)) {
599 test_msg("Got an error when we shouldn't have\n");
600 goto out;
601 }
602 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
603 test_msg("Expected a real extent, got %llu\n", em->block_start);
604 goto out;
605 }
606 if (em->start != offset || em->len != 2 * sectorsize) {
607 test_msg("Unexpected extent wanted start %llu len %u,"
608 "got start %llu len %llu\n",
609 offset, 2 * sectorsize, em->start, em->len);
610 goto out;
611 }
612 if (em->flags != compressed_only) {
613 test_msg("Unexpected flags set, want %lu have %lu\n",
614 compressed_only, em->flags);
615 goto out;
616 }
617 if (em->orig_start != em->start) {
618 test_msg("Wrong orig offset, want %llu, have %llu\n",
619 em->start, em->orig_start);
620 goto out;
621 }
622 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
623 test_msg("Unexpected compress type, wanted %d, got %d\n",
624 BTRFS_COMPRESS_ZLIB, em->compress_type);
625 goto out;
626 }
627 offset = em->start + em->len;
628 free_extent_map(em);
629
630 /* Split compressed extent */
631 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
632 if (IS_ERR(em)) {
633 test_msg("Got an error when we shouldn't have\n");
634 goto out;
635 }
636 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
637 test_msg("Expected a real extent, got %llu\n", em->block_start);
638 goto out;
639 }
640 if (em->start != offset || em->len != sectorsize) {
641 test_msg("Unexpected extent wanted start %llu len %u,"
642 "got start %llu len %llu\n",
643 offset, sectorsize, em->start, em->len);
644 goto out;
645 }
646 if (em->flags != compressed_only) {
647 test_msg("Unexpected flags set, want %lu have %lu\n",
648 compressed_only, em->flags);
649 goto out;
650 }
651 if (em->orig_start != em->start) {
652 test_msg("Wrong orig offset, want %llu, have %llu\n",
653 em->start, em->orig_start);
654 goto out;
655 }
656 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
657 test_msg("Unexpected compress type, wanted %d, got %d\n",
658 BTRFS_COMPRESS_ZLIB, em->compress_type);
659 goto out;
660 }
661 disk_bytenr = em->block_start;
662 orig_start = em->start;
663 offset = em->start + em->len;
664 free_extent_map(em);
665
666 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
667 if (IS_ERR(em)) {
668 test_msg("Got an error when we shouldn't have\n");
669 goto out;
670 }
671 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
672 test_msg("Expected a real extent, got %llu\n", em->block_start);
673 goto out;
674 }
675 if (em->start != offset || em->len != sectorsize) {
676 test_msg("Unexpected extent wanted start %llu len %u, "
677 "got start %llu len %llu\n",
678 offset, sectorsize, em->start, em->len);
679 goto out;
680 }
681 if (em->flags != 0) {
682 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
683 goto out;
684 }
685 if (em->orig_start != em->start) {
686 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
687 em->orig_start);
688 goto out;
689 }
690 offset = em->start + em->len;
691 free_extent_map(em);
692
693 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
694 if (IS_ERR(em)) {
695 test_msg("Got an error when we shouldn't have\n");
696 goto out;
697 }
698 if (em->block_start != disk_bytenr) {
699 test_msg("Block start does not match, want %llu got %llu\n",
700 disk_bytenr, em->block_start);
701 goto out;
702 }
703 if (em->start != offset || em->len != 2 * sectorsize) {
704 test_msg("Unexpected extent wanted start %llu len %u, "
705 "got start %llu len %llu\n",
706 offset, 2 * sectorsize, em->start, em->len);
707 goto out;
708 }
709 if (em->flags != compressed_only) {
710 test_msg("Unexpected flags set, want %lu have %lu\n",
711 compressed_only, em->flags);
712 goto out;
713 }
714 if (em->orig_start != orig_start) {
715 test_msg("Wrong orig offset, want %llu, have %llu\n",
716 em->start, orig_start);
717 goto out;
718 }
719 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
720 test_msg("Unexpected compress type, wanted %d, got %d\n",
721 BTRFS_COMPRESS_ZLIB, em->compress_type);
722 goto out;
723 }
724 offset = em->start + em->len;
725 free_extent_map(em);
726
727 /* A hole between regular extents but no hole extent */
728 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6,
729 sectorsize, 0);
730 if (IS_ERR(em)) {
731 test_msg("Got an error when we shouldn't have\n");
732 goto out;
733 }
734 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
735 test_msg("Expected a real extent, got %llu\n", em->block_start);
736 goto out;
737 }
738 if (em->start != offset || em->len != sectorsize) {
739 test_msg("Unexpected extent wanted start %llu len %u, "
740 "got start %llu len %llu\n",
741 offset, sectorsize, em->start, em->len);
742 goto out;
743 }
744 if (em->flags != 0) {
745 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
746 goto out;
747 }
748 if (em->orig_start != em->start) {
749 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
750 em->orig_start);
751 goto out;
752 }
753 offset = em->start + em->len;
754 free_extent_map(em);
755
756 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M, 0);
757 if (IS_ERR(em)) {
758 test_msg("Got an error when we shouldn't have\n");
759 goto out;
760 }
761 if (em->block_start != EXTENT_MAP_HOLE) {
762 test_msg("Expected a hole extent, got %llu\n", em->block_start);
763 goto out;
764 }
765 /*
766 * Currently we just return a length that we requested rather than the
767 * length of the actual hole, if this changes we'll have to change this
768 * test.
769 */
770 if (em->start != offset || em->len != 3 * sectorsize) {
771 test_msg("Unexpected extent wanted start %llu len %u, "
772 "got start %llu len %llu\n",
773 offset, 3 * sectorsize, em->start, em->len);
774 goto out;
775 }
776 if (em->flags != vacancy_only) {
777 test_msg("Unexpected flags set, want %lu have %lu\n",
778 vacancy_only, em->flags);
779 goto out;
780 }
781 if (em->orig_start != em->start) {
782 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
783 em->orig_start);
784 goto out;
785 }
786 offset = em->start + em->len;
787 free_extent_map(em);
788
789 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0);
790 if (IS_ERR(em)) {
791 test_msg("Got an error when we shouldn't have\n");
792 goto out;
793 }
794 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
795 test_msg("Expected a real extent, got %llu\n", em->block_start);
796 goto out;
797 }
798 if (em->start != offset || em->len != sectorsize) {
799 test_msg("Unexpected extent wanted start %llu len %u,"
800 "got start %llu len %llu\n",
801 offset, sectorsize, em->start, em->len);
802 goto out;
803 }
804 if (em->flags != 0) {
805 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
806 goto out;
807 }
808 if (em->orig_start != em->start) {
809 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
810 em->orig_start);
811 goto out;
812 }
813 ret = 0;
814out:
815 if (!IS_ERR(em))
816 free_extent_map(em);
817 iput(inode);
818 btrfs_free_dummy_root(root);
819 btrfs_free_dummy_fs_info(fs_info);
820 return ret;
821}
822
823static int test_hole_first(u32 sectorsize, u32 nodesize)
824{
825 struct btrfs_fs_info *fs_info = NULL;
826 struct inode *inode = NULL;
827 struct btrfs_root *root = NULL;
828 struct extent_map *em = NULL;
829 int ret = -ENOMEM;
830
831 inode = btrfs_new_test_inode();
832 if (!inode) {
833 test_msg("Couldn't allocate inode\n");
834 return ret;
835 }
836
837 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
838 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
839 BTRFS_I(inode)->location.offset = 0;
840
841 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
842 if (!fs_info) {
843 test_msg("Couldn't allocate dummy fs info\n");
844 goto out;
845 }
846
847 root = btrfs_alloc_dummy_root(fs_info);
848 if (IS_ERR(root)) {
849 test_msg("Couldn't allocate root\n");
850 goto out;
851 }
852
853 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
854 if (!root->node) {
855 test_msg("Couldn't allocate dummy buffer\n");
856 goto out;
857 }
858
859 extent_buffer_get(root->node);
860 btrfs_set_header_nritems(root->node, 0);
861 btrfs_set_header_level(root->node, 0);
862 BTRFS_I(inode)->root = root;
863 ret = -EINVAL;
864
865 /*
866 * Need a blank inode item here just so we don't confuse
867 * btrfs_get_extent.
868 */
869 insert_inode_item_key(root);
870 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
871 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
872 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize, 0);
873 if (IS_ERR(em)) {
874 test_msg("Got an error when we shouldn't have\n");
875 goto out;
876 }
877 if (em->block_start != EXTENT_MAP_HOLE) {
878 test_msg("Expected a hole, got %llu\n", em->block_start);
879 goto out;
880 }
881 if (em->start != 0 || em->len != sectorsize) {
882 test_msg("Unexpected extent wanted start 0 len %u, "
883 "got start %llu len %llu\n",
884 sectorsize, em->start, em->len);
885 goto out;
886 }
887 if (em->flags != vacancy_only) {
888 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
889 em->flags);
890 goto out;
891 }
892 free_extent_map(em);
893
894 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize,
895 2 * sectorsize, 0);
896 if (IS_ERR(em)) {
897 test_msg("Got an error when we shouldn't have\n");
898 goto out;
899 }
900 if (em->block_start != sectorsize) {
901 test_msg("Expected a real extent, got %llu\n", em->block_start);
902 goto out;
903 }
904 if (em->start != sectorsize || em->len != sectorsize) {
905 test_msg("Unexpected extent wanted start %u len %u, "
906 "got start %llu len %llu\n",
907 sectorsize, sectorsize, em->start, em->len);
908 goto out;
909 }
910 if (em->flags != 0) {
911 test_msg("Unexpected flags set, wanted 0 got %lu\n",
912 em->flags);
913 goto out;
914 }
915 ret = 0;
916out:
917 if (!IS_ERR(em))
918 free_extent_map(em);
919 iput(inode);
920 btrfs_free_dummy_root(root);
921 btrfs_free_dummy_fs_info(fs_info);
922 return ret;
923}
924
925static int test_extent_accounting(u32 sectorsize, u32 nodesize)
926{
927 struct btrfs_fs_info *fs_info = NULL;
928 struct inode *inode = NULL;
929 struct btrfs_root *root = NULL;
930 int ret = -ENOMEM;
931
932 inode = btrfs_new_test_inode();
933 if (!inode) {
934 test_msg("Couldn't allocate inode\n");
935 return ret;
936 }
937
938 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
939 if (!fs_info) {
940 test_msg("Couldn't allocate dummy fs info\n");
941 goto out;
942 }
943
944 root = btrfs_alloc_dummy_root(fs_info);
945 if (IS_ERR(root)) {
946 test_msg("Couldn't allocate root\n");
947 goto out;
948 }
949
950 BTRFS_I(inode)->root = root;
951 btrfs_test_inode_set_ops(inode);
952
953 /* [BTRFS_MAX_EXTENT_SIZE] */
954 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0,
955 NULL, 0);
956 if (ret) {
957 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
958 goto out;
959 }
960 if (BTRFS_I(inode)->outstanding_extents != 1) {
961 ret = -EINVAL;
962 test_msg("Miscount, wanted 1, got %u\n",
963 BTRFS_I(inode)->outstanding_extents);
964 goto out;
965 }
966
967 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
968 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
969 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
970 0, NULL, 0);
971 if (ret) {
972 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
973 goto out;
974 }
975 if (BTRFS_I(inode)->outstanding_extents != 2) {
976 ret = -EINVAL;
977 test_msg("Miscount, wanted 2, got %u\n",
978 BTRFS_I(inode)->outstanding_extents);
979 goto out;
980 }
981
982 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
983 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
984 BTRFS_MAX_EXTENT_SIZE >> 1,
985 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
986 EXTENT_DELALLOC | EXTENT_DIRTY |
987 EXTENT_UPTODATE, 0, 0, NULL);
988 if (ret) {
989 test_msg("clear_extent_bit returned %d\n", ret);
990 goto out;
991 }
992 if (BTRFS_I(inode)->outstanding_extents != 2) {
993 ret = -EINVAL;
994 test_msg("Miscount, wanted 2, got %u\n",
995 BTRFS_I(inode)->outstanding_extents);
996 goto out;
997 }
998
999 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
1000 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
1001 (BTRFS_MAX_EXTENT_SIZE >> 1)
1002 + sectorsize - 1,
1003 0, NULL, 0);
1004 if (ret) {
1005 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1006 goto out;
1007 }
1008 if (BTRFS_I(inode)->outstanding_extents != 2) {
1009 ret = -EINVAL;
1010 test_msg("Miscount, wanted 2, got %u\n",
1011 BTRFS_I(inode)->outstanding_extents);
1012 goto out;
1013 }
1014
1015 /*
1016 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1017 */
1018 ret = btrfs_set_extent_delalloc(inode,
1019 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1020 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1021 0, NULL, 0);
1022 if (ret) {
1023 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1024 goto out;
1025 }
1026 if (BTRFS_I(inode)->outstanding_extents != 4) {
1027 ret = -EINVAL;
1028 test_msg("Miscount, wanted 4, got %u\n",
1029 BTRFS_I(inode)->outstanding_extents);
1030 goto out;
1031 }
1032
1033 /*
1034 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1035 */
1036 ret = btrfs_set_extent_delalloc(inode,
1037 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1038 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
1039 if (ret) {
1040 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1041 goto out;
1042 }
1043 if (BTRFS_I(inode)->outstanding_extents != 3) {
1044 ret = -EINVAL;
1045 test_msg("Miscount, wanted 3, got %u\n",
1046 BTRFS_I(inode)->outstanding_extents);
1047 goto out;
1048 }
1049
1050 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1051 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1052 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1053 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1054 EXTENT_DIRTY | EXTENT_DELALLOC |
1055 EXTENT_UPTODATE, 0, 0, NULL);
1056 if (ret) {
1057 test_msg("clear_extent_bit returned %d\n", ret);
1058 goto out;
1059 }
1060 if (BTRFS_I(inode)->outstanding_extents != 4) {
1061 ret = -EINVAL;
1062 test_msg("Miscount, wanted 4, got %u\n",
1063 BTRFS_I(inode)->outstanding_extents);
1064 goto out;
1065 }
1066
1067 /*
1068 * Refill the hole again just for good measure, because I thought it
1069 * might fail and I'd rather satisfy my paranoia at this point.
1070 */
1071 ret = btrfs_set_extent_delalloc(inode,
1072 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1073 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL, 0);
1074 if (ret) {
1075 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1076 goto out;
1077 }
1078 if (BTRFS_I(inode)->outstanding_extents != 3) {
1079 ret = -EINVAL;
1080 test_msg("Miscount, wanted 3, got %u\n",
1081 BTRFS_I(inode)->outstanding_extents);
1082 goto out;
1083 }
1084
1085 /* Empty */
1086 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1087 EXTENT_DIRTY | EXTENT_DELALLOC |
1088 EXTENT_UPTODATE, 0, 0, NULL);
1089 if (ret) {
1090 test_msg("clear_extent_bit returned %d\n", ret);
1091 goto out;
1092 }
1093 if (BTRFS_I(inode)->outstanding_extents) {
1094 ret = -EINVAL;
1095 test_msg("Miscount, wanted 0, got %u\n",
1096 BTRFS_I(inode)->outstanding_extents);
1097 goto out;
1098 }
1099 ret = 0;
1100out:
1101 if (ret)
1102 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1103 EXTENT_DIRTY | EXTENT_DELALLOC |
1104 EXTENT_UPTODATE, 0, 0, NULL);
1105 iput(inode);
1106 btrfs_free_dummy_root(root);
1107 btrfs_free_dummy_fs_info(fs_info);
1108 return ret;
1109}
1110
1111int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1112{
1113 int ret;
1114
1115 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1116 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1117
1118 test_msg("Running btrfs_get_extent tests\n");
1119 ret = test_btrfs_get_extent(sectorsize, nodesize);
1120 if (ret)
1121 return ret;
1122 test_msg("Running hole first btrfs_get_extent test\n");
1123 ret = test_hole_first(sectorsize, nodesize);
1124 if (ret)
1125 return ret;
1126 test_msg("Running outstanding_extents tests\n");
1127 return test_extent_accounting(sectorsize, nodesize);
1128}