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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6#include <linux/types.h>
7#include "btrfs-tests.h"
8#include "../ctree.h"
9#include "../btrfs_inode.h"
10#include "../disk-io.h"
11#include "../extent_io.h"
12#include "../volumes.h"
13#include "../compression.h"
14#include "../accessors.h"
15
16static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
17 u64 ram_bytes, u64 offset, u64 disk_bytenr,
18 u64 disk_len, u32 type, u8 compression, int slot)
19{
20 struct btrfs_path path;
21 struct btrfs_file_extent_item *fi;
22 struct extent_buffer *leaf = root->node;
23 struct btrfs_key key;
24 u32 value_len = sizeof(struct btrfs_file_extent_item);
25
26 if (type == BTRFS_FILE_EXTENT_INLINE)
27 value_len += len;
28 memset(&path, 0, sizeof(path));
29
30 path.nodes[0] = leaf;
31 path.slots[0] = slot;
32
33 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
34 key.type = BTRFS_EXTENT_DATA_KEY;
35 key.offset = start;
36
37 btrfs_setup_item_for_insert(root, &path, &key, value_len);
38 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
39 btrfs_set_file_extent_generation(leaf, fi, 1);
40 btrfs_set_file_extent_type(leaf, fi, type);
41 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
42 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
43 btrfs_set_file_extent_offset(leaf, fi, offset);
44 btrfs_set_file_extent_num_bytes(leaf, fi, len);
45 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
46 btrfs_set_file_extent_compression(leaf, fi, compression);
47 btrfs_set_file_extent_encryption(leaf, fi, 0);
48 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
49}
50
51static void insert_inode_item_key(struct btrfs_root *root)
52{
53 struct btrfs_path path;
54 struct extent_buffer *leaf = root->node;
55 struct btrfs_key key;
56 u32 value_len = 0;
57
58 memset(&path, 0, sizeof(path));
59
60 path.nodes[0] = leaf;
61 path.slots[0] = 0;
62
63 key.objectid = BTRFS_INODE_ITEM_KEY;
64 key.type = BTRFS_INODE_ITEM_KEY;
65 key.offset = 0;
66
67 btrfs_setup_item_for_insert(root, &path, &key, value_len);
68}
69
70/*
71 * Build the most complicated map of extents the earth has ever seen. We want
72 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
73 * diagram of how the extents will look though this may not be possible we still
74 * want to make sure everything acts normally (the last number is not inclusive)
75 *
76 * [0 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
77 * [inline][hole but no extent][ hole ][ regular ][regular1 split]
78 *
79 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
80 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
81 *
82 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
83 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
84 *
85 * [69635-73731][ 73731 - 86019 ][86019-90115]
86 * [ regular ][ hole but no extent][ regular ]
87 */
88static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
89{
90 int slot = 0;
91 u64 disk_bytenr = SZ_1M;
92 u64 offset = 0;
93
94 /*
95 * Tree-checker has strict limits on inline extents that they can only
96 * exist at file offset 0, thus we can only have one inline file extent
97 * at most.
98 */
99 insert_extent(root, offset, 6, 6, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
100 slot);
101 slot++;
102 offset = sectorsize;
103
104 /* Now another hole */
105 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
106 slot);
107 slot++;
108 offset += 4;
109
110 /* Now for a regular extent */
111 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
112 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
113 slot++;
114 disk_bytenr += sectorsize;
115 offset += sectorsize - 1;
116
117 /*
118 * Now for 3 extents that were split from a hole punch so we test
119 * offsets properly.
120 */
121 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
122 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
123 slot++;
124 offset += sectorsize;
125 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
126 BTRFS_FILE_EXTENT_REG, 0, slot);
127 slot++;
128 offset += sectorsize;
129 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
130 2 * sectorsize, disk_bytenr, 4 * sectorsize,
131 BTRFS_FILE_EXTENT_REG, 0, slot);
132 slot++;
133 offset += 2 * sectorsize;
134 disk_bytenr += 4 * sectorsize;
135
136 /* Now for a unwritten prealloc extent */
137 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
138 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
139 slot++;
140 offset += sectorsize;
141
142 /*
143 * We want to jack up disk_bytenr a little more so the em stuff doesn't
144 * merge our records.
145 */
146 disk_bytenr += 2 * sectorsize;
147
148 /*
149 * Now for a partially written prealloc extent, basically the same as
150 * the hole punch example above. Ram_bytes never changes when you mark
151 * extents written btw.
152 */
153 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
154 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
155 slot++;
156 offset += sectorsize;
157 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
158 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
159 slot);
160 slot++;
161 offset += sectorsize;
162 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
163 2 * sectorsize, disk_bytenr, 4 * sectorsize,
164 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
165 slot++;
166 offset += 2 * sectorsize;
167 disk_bytenr += 4 * sectorsize;
168
169 /* Now a normal compressed extent */
170 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
171 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
172 BTRFS_COMPRESS_ZLIB, slot);
173 slot++;
174 offset += 2 * sectorsize;
175 /* No merges */
176 disk_bytenr += 2 * sectorsize;
177
178 /* Now a split compressed extent */
179 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
180 sectorsize, BTRFS_FILE_EXTENT_REG,
181 BTRFS_COMPRESS_ZLIB, slot);
182 slot++;
183 offset += sectorsize;
184 insert_extent(root, offset, sectorsize, sectorsize, 0,
185 disk_bytenr + sectorsize, sectorsize,
186 BTRFS_FILE_EXTENT_REG, 0, slot);
187 slot++;
188 offset += sectorsize;
189 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
190 2 * sectorsize, disk_bytenr, sectorsize,
191 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
192 slot++;
193 offset += 2 * sectorsize;
194 disk_bytenr += 2 * sectorsize;
195
196 /* Now extents that have a hole but no hole extent */
197 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
198 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
199 slot++;
200 offset += 4 * sectorsize;
201 disk_bytenr += sectorsize;
202 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
203 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
204}
205
206static unsigned long prealloc_only = 0;
207static unsigned long compressed_only = 0;
208static unsigned long vacancy_only = 0;
209
210static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
211{
212 struct btrfs_fs_info *fs_info = NULL;
213 struct inode *inode = NULL;
214 struct btrfs_root *root = NULL;
215 struct extent_map *em = NULL;
216 u64 orig_start;
217 u64 disk_bytenr;
218 u64 offset;
219 int ret = -ENOMEM;
220
221 test_msg("running btrfs_get_extent tests");
222
223 inode = btrfs_new_test_inode();
224 if (!inode) {
225 test_std_err(TEST_ALLOC_INODE);
226 return ret;
227 }
228
229 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
230 if (!fs_info) {
231 test_std_err(TEST_ALLOC_FS_INFO);
232 goto out;
233 }
234
235 root = btrfs_alloc_dummy_root(fs_info);
236 if (IS_ERR(root)) {
237 test_std_err(TEST_ALLOC_ROOT);
238 goto out;
239 }
240
241 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
242 if (!root->node) {
243 test_std_err(TEST_ALLOC_ROOT);
244 goto out;
245 }
246
247 btrfs_set_header_nritems(root->node, 0);
248 btrfs_set_header_level(root->node, 0);
249 ret = -EINVAL;
250
251 /* First with no extents */
252 BTRFS_I(inode)->root = root;
253 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize);
254 if (IS_ERR(em)) {
255 em = NULL;
256 test_err("got an error when we shouldn't have");
257 goto out;
258 }
259 if (em->block_start != EXTENT_MAP_HOLE) {
260 test_err("expected a hole, got %llu", em->block_start);
261 goto out;
262 }
263 free_extent_map(em);
264 btrfs_drop_extent_map_range(BTRFS_I(inode), 0, (u64)-1, false);
265
266 /*
267 * All of the magic numbers are based on the mapping setup in
268 * setup_file_extents, so if you change anything there you need to
269 * update the comment and update the expected values below.
270 */
271 setup_file_extents(root, sectorsize);
272
273 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1);
274 if (IS_ERR(em)) {
275 test_err("got an error when we shouldn't have");
276 goto out;
277 }
278 if (em->block_start != EXTENT_MAP_INLINE) {
279 test_err("expected an inline, got %llu", em->block_start);
280 goto out;
281 }
282
283 /*
284 * For inline extent, we always round up the em to sectorsize, as
285 * they are either:
286 *
287 * a) a hidden hole
288 * The range will be zeroed at inline extent read time.
289 *
290 * b) a file extent with unaligned bytenr
291 * Tree checker will reject it.
292 */
293 if (em->start != 0 || em->len != sectorsize) {
294 test_err(
295 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
296 sectorsize, em->start, em->len);
297 goto out;
298 }
299 if (em->flags != 0) {
300 test_err("unexpected flags set, want 0 have %lu", em->flags);
301 goto out;
302 }
303 /*
304 * We don't test anything else for inline since it doesn't get set
305 * unless we have a page for it to write into. Maybe we should change
306 * this?
307 */
308 offset = em->start + em->len;
309 free_extent_map(em);
310
311 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
312 if (IS_ERR(em)) {
313 test_err("got an error when we shouldn't have");
314 goto out;
315 }
316 if (em->block_start != EXTENT_MAP_HOLE) {
317 test_err("expected a hole, got %llu", em->block_start);
318 goto out;
319 }
320 if (em->start != offset || em->len != 4) {
321 test_err(
322 "unexpected extent wanted start %llu len 4, got start %llu len %llu",
323 offset, em->start, em->len);
324 goto out;
325 }
326 if (em->flags != 0) {
327 test_err("unexpected flags set, want 0 have %lu", em->flags);
328 goto out;
329 }
330 offset = em->start + em->len;
331 free_extent_map(em);
332
333 /* Regular extent */
334 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
335 if (IS_ERR(em)) {
336 test_err("got an error when we shouldn't have");
337 goto out;
338 }
339 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
340 test_err("expected a real extent, got %llu", em->block_start);
341 goto out;
342 }
343 if (em->start != offset || em->len != sectorsize - 1) {
344 test_err(
345 "unexpected extent wanted start %llu len 4095, got start %llu len %llu",
346 offset, em->start, em->len);
347 goto out;
348 }
349 if (em->flags != 0) {
350 test_err("unexpected flags set, want 0 have %lu", em->flags);
351 goto out;
352 }
353 if (em->orig_start != em->start) {
354 test_err("wrong orig offset, want %llu, have %llu", em->start,
355 em->orig_start);
356 goto out;
357 }
358 offset = em->start + em->len;
359 free_extent_map(em);
360
361 /* The next 3 are split extents */
362 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
363 if (IS_ERR(em)) {
364 test_err("got an error when we shouldn't have");
365 goto out;
366 }
367 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
368 test_err("expected a real extent, got %llu", em->block_start);
369 goto out;
370 }
371 if (em->start != offset || em->len != sectorsize) {
372 test_err(
373 "unexpected extent start %llu len %u, got start %llu len %llu",
374 offset, sectorsize, em->start, em->len);
375 goto out;
376 }
377 if (em->flags != 0) {
378 test_err("unexpected flags set, want 0 have %lu", em->flags);
379 goto out;
380 }
381 if (em->orig_start != em->start) {
382 test_err("wrong orig offset, want %llu, have %llu", em->start,
383 em->orig_start);
384 goto out;
385 }
386 disk_bytenr = em->block_start;
387 orig_start = em->start;
388 offset = em->start + em->len;
389 free_extent_map(em);
390
391 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
392 if (IS_ERR(em)) {
393 test_err("got an error when we shouldn't have");
394 goto out;
395 }
396 if (em->block_start != EXTENT_MAP_HOLE) {
397 test_err("expected a hole, got %llu", em->block_start);
398 goto out;
399 }
400 if (em->start != offset || em->len != sectorsize) {
401 test_err(
402 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
403 offset, sectorsize, em->start, em->len);
404 goto out;
405 }
406 if (em->flags != 0) {
407 test_err("unexpected flags set, want 0 have %lu", em->flags);
408 goto out;
409 }
410 offset = em->start + em->len;
411 free_extent_map(em);
412
413 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
414 if (IS_ERR(em)) {
415 test_err("got an error when we shouldn't have");
416 goto out;
417 }
418 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
419 test_err("expected a real extent, got %llu", em->block_start);
420 goto out;
421 }
422 if (em->start != offset || em->len != 2 * sectorsize) {
423 test_err(
424 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
425 offset, 2 * sectorsize, em->start, em->len);
426 goto out;
427 }
428 if (em->flags != 0) {
429 test_err("unexpected flags set, want 0 have %lu", em->flags);
430 goto out;
431 }
432 if (em->orig_start != orig_start) {
433 test_err("wrong orig offset, want %llu, have %llu",
434 orig_start, em->orig_start);
435 goto out;
436 }
437 disk_bytenr += (em->start - orig_start);
438 if (em->block_start != disk_bytenr) {
439 test_err("wrong block start, want %llu, have %llu",
440 disk_bytenr, em->block_start);
441 goto out;
442 }
443 offset = em->start + em->len;
444 free_extent_map(em);
445
446 /* Prealloc extent */
447 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
448 if (IS_ERR(em)) {
449 test_err("got an error when we shouldn't have");
450 goto out;
451 }
452 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
453 test_err("expected a real extent, got %llu", em->block_start);
454 goto out;
455 }
456 if (em->start != offset || em->len != sectorsize) {
457 test_err(
458 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
459 offset, sectorsize, em->start, em->len);
460 goto out;
461 }
462 if (em->flags != prealloc_only) {
463 test_err("unexpected flags set, want %lu have %lu",
464 prealloc_only, em->flags);
465 goto out;
466 }
467 if (em->orig_start != em->start) {
468 test_err("wrong orig offset, want %llu, have %llu", em->start,
469 em->orig_start);
470 goto out;
471 }
472 offset = em->start + em->len;
473 free_extent_map(em);
474
475 /* The next 3 are a half written prealloc extent */
476 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
477 if (IS_ERR(em)) {
478 test_err("got an error when we shouldn't have");
479 goto out;
480 }
481 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
482 test_err("expected a real extent, got %llu", em->block_start);
483 goto out;
484 }
485 if (em->start != offset || em->len != sectorsize) {
486 test_err(
487 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
488 offset, sectorsize, em->start, em->len);
489 goto out;
490 }
491 if (em->flags != prealloc_only) {
492 test_err("unexpected flags set, want %lu have %lu",
493 prealloc_only, em->flags);
494 goto out;
495 }
496 if (em->orig_start != em->start) {
497 test_err("wrong orig offset, want %llu, have %llu", em->start,
498 em->orig_start);
499 goto out;
500 }
501 disk_bytenr = em->block_start;
502 orig_start = em->start;
503 offset = em->start + em->len;
504 free_extent_map(em);
505
506 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
507 if (IS_ERR(em)) {
508 test_err("got an error when we shouldn't have");
509 goto out;
510 }
511 if (em->block_start >= EXTENT_MAP_HOLE) {
512 test_err("expected a real extent, got %llu", em->block_start);
513 goto out;
514 }
515 if (em->start != offset || em->len != sectorsize) {
516 test_err(
517 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
518 offset, sectorsize, em->start, em->len);
519 goto out;
520 }
521 if (em->flags != 0) {
522 test_err("unexpected flags set, want 0 have %lu", em->flags);
523 goto out;
524 }
525 if (em->orig_start != orig_start) {
526 test_err("unexpected orig offset, wanted %llu, have %llu",
527 orig_start, em->orig_start);
528 goto out;
529 }
530 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
531 test_err("unexpected block start, wanted %llu, have %llu",
532 disk_bytenr + (em->start - em->orig_start),
533 em->block_start);
534 goto out;
535 }
536 offset = em->start + em->len;
537 free_extent_map(em);
538
539 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
540 if (IS_ERR(em)) {
541 test_err("got an error when we shouldn't have");
542 goto out;
543 }
544 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
545 test_err("expected a real extent, got %llu", em->block_start);
546 goto out;
547 }
548 if (em->start != offset || em->len != 2 * sectorsize) {
549 test_err(
550 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
551 offset, 2 * sectorsize, em->start, em->len);
552 goto out;
553 }
554 if (em->flags != prealloc_only) {
555 test_err("unexpected flags set, want %lu have %lu",
556 prealloc_only, em->flags);
557 goto out;
558 }
559 if (em->orig_start != orig_start) {
560 test_err("wrong orig offset, want %llu, have %llu", orig_start,
561 em->orig_start);
562 goto out;
563 }
564 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
565 test_err("unexpected block start, wanted %llu, have %llu",
566 disk_bytenr + (em->start - em->orig_start),
567 em->block_start);
568 goto out;
569 }
570 offset = em->start + em->len;
571 free_extent_map(em);
572
573 /* Now for the compressed extent */
574 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
575 if (IS_ERR(em)) {
576 test_err("got an error when we shouldn't have");
577 goto out;
578 }
579 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
580 test_err("expected a real extent, got %llu", em->block_start);
581 goto out;
582 }
583 if (em->start != offset || em->len != 2 * sectorsize) {
584 test_err(
585 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
586 offset, 2 * sectorsize, em->start, em->len);
587 goto out;
588 }
589 if (em->flags != compressed_only) {
590 test_err("unexpected flags set, want %lu have %lu",
591 compressed_only, em->flags);
592 goto out;
593 }
594 if (em->orig_start != em->start) {
595 test_err("wrong orig offset, want %llu, have %llu",
596 em->start, em->orig_start);
597 goto out;
598 }
599 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
600 test_err("unexpected compress type, wanted %d, got %d",
601 BTRFS_COMPRESS_ZLIB, em->compress_type);
602 goto out;
603 }
604 offset = em->start + em->len;
605 free_extent_map(em);
606
607 /* Split compressed extent */
608 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
609 if (IS_ERR(em)) {
610 test_err("got an error when we shouldn't have");
611 goto out;
612 }
613 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
614 test_err("expected a real extent, got %llu", em->block_start);
615 goto out;
616 }
617 if (em->start != offset || em->len != sectorsize) {
618 test_err(
619 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
620 offset, sectorsize, em->start, em->len);
621 goto out;
622 }
623 if (em->flags != compressed_only) {
624 test_err("unexpected flags set, want %lu have %lu",
625 compressed_only, em->flags);
626 goto out;
627 }
628 if (em->orig_start != em->start) {
629 test_err("wrong orig offset, want %llu, have %llu",
630 em->start, em->orig_start);
631 goto out;
632 }
633 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
634 test_err("unexpected compress type, wanted %d, got %d",
635 BTRFS_COMPRESS_ZLIB, em->compress_type);
636 goto out;
637 }
638 disk_bytenr = em->block_start;
639 orig_start = em->start;
640 offset = em->start + em->len;
641 free_extent_map(em);
642
643 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
644 if (IS_ERR(em)) {
645 test_err("got an error when we shouldn't have");
646 goto out;
647 }
648 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
649 test_err("expected a real extent, got %llu", em->block_start);
650 goto out;
651 }
652 if (em->start != offset || em->len != sectorsize) {
653 test_err(
654 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
655 offset, sectorsize, em->start, em->len);
656 goto out;
657 }
658 if (em->flags != 0) {
659 test_err("unexpected flags set, want 0 have %lu", em->flags);
660 goto out;
661 }
662 if (em->orig_start != em->start) {
663 test_err("wrong orig offset, want %llu, have %llu", em->start,
664 em->orig_start);
665 goto out;
666 }
667 offset = em->start + em->len;
668 free_extent_map(em);
669
670 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
671 if (IS_ERR(em)) {
672 test_err("got an error when we shouldn't have");
673 goto out;
674 }
675 if (em->block_start != disk_bytenr) {
676 test_err("block start does not match, want %llu got %llu",
677 disk_bytenr, em->block_start);
678 goto out;
679 }
680 if (em->start != offset || em->len != 2 * sectorsize) {
681 test_err(
682 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
683 offset, 2 * sectorsize, em->start, em->len);
684 goto out;
685 }
686 if (em->flags != compressed_only) {
687 test_err("unexpected flags set, want %lu have %lu",
688 compressed_only, em->flags);
689 goto out;
690 }
691 if (em->orig_start != orig_start) {
692 test_err("wrong orig offset, want %llu, have %llu",
693 em->start, orig_start);
694 goto out;
695 }
696 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
697 test_err("unexpected compress type, wanted %d, got %d",
698 BTRFS_COMPRESS_ZLIB, em->compress_type);
699 goto out;
700 }
701 offset = em->start + em->len;
702 free_extent_map(em);
703
704 /* A hole between regular extents but no hole extent */
705 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6, sectorsize);
706 if (IS_ERR(em)) {
707 test_err("got an error when we shouldn't have");
708 goto out;
709 }
710 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
711 test_err("expected a real extent, got %llu", em->block_start);
712 goto out;
713 }
714 if (em->start != offset || em->len != sectorsize) {
715 test_err(
716 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
717 offset, sectorsize, em->start, em->len);
718 goto out;
719 }
720 if (em->flags != 0) {
721 test_err("unexpected flags set, want 0 have %lu", em->flags);
722 goto out;
723 }
724 if (em->orig_start != em->start) {
725 test_err("wrong orig offset, want %llu, have %llu", em->start,
726 em->orig_start);
727 goto out;
728 }
729 offset = em->start + em->len;
730 free_extent_map(em);
731
732 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M);
733 if (IS_ERR(em)) {
734 test_err("got an error when we shouldn't have");
735 goto out;
736 }
737 if (em->block_start != EXTENT_MAP_HOLE) {
738 test_err("expected a hole extent, got %llu", em->block_start);
739 goto out;
740 }
741 /*
742 * Currently we just return a length that we requested rather than the
743 * length of the actual hole, if this changes we'll have to change this
744 * test.
745 */
746 if (em->start != offset || em->len != 3 * sectorsize) {
747 test_err(
748 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
749 offset, 3 * sectorsize, em->start, em->len);
750 goto out;
751 }
752 if (em->flags != vacancy_only) {
753 test_err("unexpected flags set, want %lu have %lu",
754 vacancy_only, em->flags);
755 goto out;
756 }
757 if (em->orig_start != em->start) {
758 test_err("wrong orig offset, want %llu, have %llu", em->start,
759 em->orig_start);
760 goto out;
761 }
762 offset = em->start + em->len;
763 free_extent_map(em);
764
765 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
766 if (IS_ERR(em)) {
767 test_err("got an error when we shouldn't have");
768 goto out;
769 }
770 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
771 test_err("expected a real extent, got %llu", em->block_start);
772 goto out;
773 }
774 if (em->start != offset || em->len != sectorsize) {
775 test_err(
776 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
777 offset, sectorsize, em->start, em->len);
778 goto out;
779 }
780 if (em->flags != 0) {
781 test_err("unexpected flags set, want 0 have %lu", em->flags);
782 goto out;
783 }
784 if (em->orig_start != em->start) {
785 test_err("wrong orig offset, want %llu, have %llu", em->start,
786 em->orig_start);
787 goto out;
788 }
789 ret = 0;
790out:
791 if (!IS_ERR(em))
792 free_extent_map(em);
793 iput(inode);
794 btrfs_free_dummy_root(root);
795 btrfs_free_dummy_fs_info(fs_info);
796 return ret;
797}
798
799static int test_hole_first(u32 sectorsize, u32 nodesize)
800{
801 struct btrfs_fs_info *fs_info = NULL;
802 struct inode *inode = NULL;
803 struct btrfs_root *root = NULL;
804 struct extent_map *em = NULL;
805 int ret = -ENOMEM;
806
807 test_msg("running hole first btrfs_get_extent test");
808
809 inode = btrfs_new_test_inode();
810 if (!inode) {
811 test_std_err(TEST_ALLOC_INODE);
812 return ret;
813 }
814
815 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
816 if (!fs_info) {
817 test_std_err(TEST_ALLOC_FS_INFO);
818 goto out;
819 }
820
821 root = btrfs_alloc_dummy_root(fs_info);
822 if (IS_ERR(root)) {
823 test_std_err(TEST_ALLOC_ROOT);
824 goto out;
825 }
826
827 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
828 if (!root->node) {
829 test_std_err(TEST_ALLOC_ROOT);
830 goto out;
831 }
832
833 btrfs_set_header_nritems(root->node, 0);
834 btrfs_set_header_level(root->node, 0);
835 BTRFS_I(inode)->root = root;
836 ret = -EINVAL;
837
838 /*
839 * Need a blank inode item here just so we don't confuse
840 * btrfs_get_extent.
841 */
842 insert_inode_item_key(root);
843 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
844 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
845 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize);
846 if (IS_ERR(em)) {
847 test_err("got an error when we shouldn't have");
848 goto out;
849 }
850 if (em->block_start != EXTENT_MAP_HOLE) {
851 test_err("expected a hole, got %llu", em->block_start);
852 goto out;
853 }
854 if (em->start != 0 || em->len != sectorsize) {
855 test_err(
856 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
857 sectorsize, em->start, em->len);
858 goto out;
859 }
860 if (em->flags != vacancy_only) {
861 test_err("wrong flags, wanted %lu, have %lu", vacancy_only,
862 em->flags);
863 goto out;
864 }
865 free_extent_map(em);
866
867 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize, 2 * sectorsize);
868 if (IS_ERR(em)) {
869 test_err("got an error when we shouldn't have");
870 goto out;
871 }
872 if (em->block_start != sectorsize) {
873 test_err("expected a real extent, got %llu", em->block_start);
874 goto out;
875 }
876 if (em->start != sectorsize || em->len != sectorsize) {
877 test_err(
878 "unexpected extent wanted start %u len %u, got start %llu len %llu",
879 sectorsize, sectorsize, em->start, em->len);
880 goto out;
881 }
882 if (em->flags != 0) {
883 test_err("unexpected flags set, wanted 0 got %lu",
884 em->flags);
885 goto out;
886 }
887 ret = 0;
888out:
889 if (!IS_ERR(em))
890 free_extent_map(em);
891 iput(inode);
892 btrfs_free_dummy_root(root);
893 btrfs_free_dummy_fs_info(fs_info);
894 return ret;
895}
896
897static int test_extent_accounting(u32 sectorsize, u32 nodesize)
898{
899 struct btrfs_fs_info *fs_info = NULL;
900 struct inode *inode = NULL;
901 struct btrfs_root *root = NULL;
902 int ret = -ENOMEM;
903
904 test_msg("running outstanding_extents tests");
905
906 inode = btrfs_new_test_inode();
907 if (!inode) {
908 test_std_err(TEST_ALLOC_INODE);
909 return ret;
910 }
911
912 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
913 if (!fs_info) {
914 test_std_err(TEST_ALLOC_FS_INFO);
915 goto out;
916 }
917
918 root = btrfs_alloc_dummy_root(fs_info);
919 if (IS_ERR(root)) {
920 test_std_err(TEST_ALLOC_ROOT);
921 goto out;
922 }
923
924 BTRFS_I(inode)->root = root;
925
926 /* [BTRFS_MAX_EXTENT_SIZE] */
927 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), 0,
928 BTRFS_MAX_EXTENT_SIZE - 1, 0, NULL);
929 if (ret) {
930 test_err("btrfs_set_extent_delalloc returned %d", ret);
931 goto out;
932 }
933 if (BTRFS_I(inode)->outstanding_extents != 1) {
934 ret = -EINVAL;
935 test_err("miscount, wanted 1, got %u",
936 BTRFS_I(inode)->outstanding_extents);
937 goto out;
938 }
939
940 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
941 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE,
942 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
943 0, NULL);
944 if (ret) {
945 test_err("btrfs_set_extent_delalloc returned %d", ret);
946 goto out;
947 }
948 if (BTRFS_I(inode)->outstanding_extents != 2) {
949 ret = -EINVAL;
950 test_err("miscount, wanted 2, got %u",
951 BTRFS_I(inode)->outstanding_extents);
952 goto out;
953 }
954
955 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
956 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
957 BTRFS_MAX_EXTENT_SIZE >> 1,
958 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
959 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
960 EXTENT_UPTODATE, NULL);
961 if (ret) {
962 test_err("clear_extent_bit returned %d", ret);
963 goto out;
964 }
965 if (BTRFS_I(inode)->outstanding_extents != 2) {
966 ret = -EINVAL;
967 test_err("miscount, wanted 2, got %u",
968 BTRFS_I(inode)->outstanding_extents);
969 goto out;
970 }
971
972 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
973 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE >> 1,
974 (BTRFS_MAX_EXTENT_SIZE >> 1)
975 + sectorsize - 1,
976 0, NULL);
977 if (ret) {
978 test_err("btrfs_set_extent_delalloc returned %d", ret);
979 goto out;
980 }
981 if (BTRFS_I(inode)->outstanding_extents != 2) {
982 ret = -EINVAL;
983 test_err("miscount, wanted 2, got %u",
984 BTRFS_I(inode)->outstanding_extents);
985 goto out;
986 }
987
988 /*
989 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
990 */
991 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
992 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
993 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
994 0, NULL);
995 if (ret) {
996 test_err("btrfs_set_extent_delalloc returned %d", ret);
997 goto out;
998 }
999 if (BTRFS_I(inode)->outstanding_extents != 4) {
1000 ret = -EINVAL;
1001 test_err("miscount, wanted 4, got %u",
1002 BTRFS_I(inode)->outstanding_extents);
1003 goto out;
1004 }
1005
1006 /*
1007 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1008 */
1009 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1010 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1011 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1012 if (ret) {
1013 test_err("btrfs_set_extent_delalloc returned %d", ret);
1014 goto out;
1015 }
1016 if (BTRFS_I(inode)->outstanding_extents != 3) {
1017 ret = -EINVAL;
1018 test_err("miscount, wanted 3, got %u",
1019 BTRFS_I(inode)->outstanding_extents);
1020 goto out;
1021 }
1022
1023 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1024 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1025 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1026 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1027 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1028 EXTENT_UPTODATE, NULL);
1029 if (ret) {
1030 test_err("clear_extent_bit returned %d", ret);
1031 goto out;
1032 }
1033 if (BTRFS_I(inode)->outstanding_extents != 4) {
1034 ret = -EINVAL;
1035 test_err("miscount, wanted 4, got %u",
1036 BTRFS_I(inode)->outstanding_extents);
1037 goto out;
1038 }
1039
1040 /*
1041 * Refill the hole again just for good measure, because I thought it
1042 * might fail and I'd rather satisfy my paranoia at this point.
1043 */
1044 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1045 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1046 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1047 if (ret) {
1048 test_err("btrfs_set_extent_delalloc returned %d", ret);
1049 goto out;
1050 }
1051 if (BTRFS_I(inode)->outstanding_extents != 3) {
1052 ret = -EINVAL;
1053 test_err("miscount, wanted 3, got %u",
1054 BTRFS_I(inode)->outstanding_extents);
1055 goto out;
1056 }
1057
1058 /* Empty */
1059 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1060 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1061 EXTENT_UPTODATE, NULL);
1062 if (ret) {
1063 test_err("clear_extent_bit returned %d", ret);
1064 goto out;
1065 }
1066 if (BTRFS_I(inode)->outstanding_extents) {
1067 ret = -EINVAL;
1068 test_err("miscount, wanted 0, got %u",
1069 BTRFS_I(inode)->outstanding_extents);
1070 goto out;
1071 }
1072 ret = 0;
1073out:
1074 if (ret)
1075 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1076 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1077 EXTENT_UPTODATE, NULL);
1078 iput(inode);
1079 btrfs_free_dummy_root(root);
1080 btrfs_free_dummy_fs_info(fs_info);
1081 return ret;
1082}
1083
1084int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1085{
1086 int ret;
1087
1088 test_msg("running inode tests");
1089
1090 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1091 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1092
1093 ret = test_btrfs_get_extent(sectorsize, nodesize);
1094 if (ret)
1095 return ret;
1096 ret = test_hole_first(sectorsize, nodesize);
1097 if (ret)
1098 return ret;
1099 return test_extent_accounting(sectorsize, nodesize);
1100}
1/*
2 * Copyright (C) 2013 Fusion IO. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
19#include "btrfs-tests.h"
20#include "../ctree.h"
21#include "../btrfs_inode.h"
22#include "../disk-io.h"
23#include "../extent_io.h"
24#include "../volumes.h"
25
26static struct btrfs_fs_info *alloc_dummy_fs_info(void)
27{
28 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
29 GFP_NOFS);
30 if (!fs_info)
31 return fs_info;
32 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
33 GFP_NOFS);
34 if (!fs_info->fs_devices) {
35 kfree(fs_info);
36 return NULL;
37 }
38 return fs_info;
39}
40static void free_dummy_root(struct btrfs_root *root)
41{
42 if (!root)
43 return;
44 if (root->fs_info) {
45 kfree(root->fs_info->fs_devices);
46 kfree(root->fs_info);
47 }
48 if (root->node)
49 free_extent_buffer(root->node);
50 kfree(root);
51}
52
53static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
54 u64 ram_bytes, u64 offset, u64 disk_bytenr,
55 u64 disk_len, u32 type, u8 compression, int slot)
56{
57 struct btrfs_path path;
58 struct btrfs_file_extent_item *fi;
59 struct extent_buffer *leaf = root->node;
60 struct btrfs_key key;
61 u32 value_len = sizeof(struct btrfs_file_extent_item);
62
63 if (type == BTRFS_FILE_EXTENT_INLINE)
64 value_len += len;
65 memset(&path, 0, sizeof(path));
66
67 path.nodes[0] = leaf;
68 path.slots[0] = slot;
69
70 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
71 key.type = BTRFS_EXTENT_DATA_KEY;
72 key.offset = start;
73
74 setup_items_for_insert(root, &path, &key, &value_len, value_len,
75 value_len + sizeof(struct btrfs_item), 1);
76 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
77 btrfs_set_file_extent_generation(leaf, fi, 1);
78 btrfs_set_file_extent_type(leaf, fi, type);
79 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
80 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
81 btrfs_set_file_extent_offset(leaf, fi, offset);
82 btrfs_set_file_extent_num_bytes(leaf, fi, len);
83 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
84 btrfs_set_file_extent_compression(leaf, fi, compression);
85 btrfs_set_file_extent_encryption(leaf, fi, 0);
86 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
87}
88
89static void insert_inode_item_key(struct btrfs_root *root)
90{
91 struct btrfs_path path;
92 struct extent_buffer *leaf = root->node;
93 struct btrfs_key key;
94 u32 value_len = 0;
95
96 memset(&path, 0, sizeof(path));
97
98 path.nodes[0] = leaf;
99 path.slots[0] = 0;
100
101 key.objectid = BTRFS_INODE_ITEM_KEY;
102 key.type = BTRFS_INODE_ITEM_KEY;
103 key.offset = 0;
104
105 setup_items_for_insert(root, &path, &key, &value_len, value_len,
106 value_len + sizeof(struct btrfs_item), 1);
107}
108
109/*
110 * Build the most complicated map of extents the earth has ever seen. We want
111 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
112 * diagram of how the extents will look though this may not be possible we still
113 * want to make sure everything acts normally (the last number is not inclusive)
114 *
115 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
116 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
117 *
118 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
119 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
120 *
121 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
122 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
123 *
124 * [81920-86016]
125 * [ regular ]
126 */
127static void setup_file_extents(struct btrfs_root *root)
128{
129 int slot = 0;
130 u64 disk_bytenr = 1 * 1024 * 1024;
131 u64 offset = 0;
132
133 /* First we want a hole */
134 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
135 slot);
136 slot++;
137 offset += 5;
138
139 /*
140 * Now we want an inline extent, I don't think this is possible but hey
141 * why not? Also keep in mind if we have an inline extent it counts as
142 * the whole first page. If we were to expand it we would have to cow
143 * and we wouldn't have an inline extent anymore.
144 */
145 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
146 slot);
147 slot++;
148 offset = 4096;
149
150 /* Now another hole */
151 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
152 slot);
153 slot++;
154 offset += 4;
155
156 /* Now for a regular extent */
157 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
158 BTRFS_FILE_EXTENT_REG, 0, slot);
159 slot++;
160 disk_bytenr += 4096;
161 offset += 4095;
162
163 /*
164 * Now for 3 extents that were split from a hole punch so we test
165 * offsets properly.
166 */
167 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
168 BTRFS_FILE_EXTENT_REG, 0, slot);
169 slot++;
170 offset += 4096;
171 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
172 0, slot);
173 slot++;
174 offset += 4096;
175 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
176 BTRFS_FILE_EXTENT_REG, 0, slot);
177 slot++;
178 offset += 8192;
179 disk_bytenr += 16384;
180
181 /* Now for a unwritten prealloc extent */
182 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
183 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
184 slot++;
185 offset += 4096;
186
187 /*
188 * We want to jack up disk_bytenr a little more so the em stuff doesn't
189 * merge our records.
190 */
191 disk_bytenr += 8192;
192
193 /*
194 * Now for a partially written prealloc extent, basically the same as
195 * the hole punch example above. Ram_bytes never changes when you mark
196 * extents written btw.
197 */
198 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
199 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
200 slot++;
201 offset += 4096;
202 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
203 BTRFS_FILE_EXTENT_REG, 0, slot);
204 slot++;
205 offset += 4096;
206 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
207 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
208 slot++;
209 offset += 8192;
210 disk_bytenr += 16384;
211
212 /* Now a normal compressed extent */
213 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
214 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
215 slot++;
216 offset += 8192;
217 /* No merges */
218 disk_bytenr += 8192;
219
220 /* Now a split compressed extent */
221 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
222 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
223 slot++;
224 offset += 4096;
225 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
226 BTRFS_FILE_EXTENT_REG, 0, slot);
227 slot++;
228 offset += 4096;
229 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
230 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
231 slot++;
232 offset += 8192;
233 disk_bytenr += 8192;
234
235 /* Now extents that have a hole but no hole extent */
236 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
237 BTRFS_FILE_EXTENT_REG, 0, slot);
238 slot++;
239 offset += 16384;
240 disk_bytenr += 4096;
241 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
242 BTRFS_FILE_EXTENT_REG, 0, slot);
243}
244
245static unsigned long prealloc_only = 0;
246static unsigned long compressed_only = 0;
247static unsigned long vacancy_only = 0;
248
249static noinline int test_btrfs_get_extent(void)
250{
251 struct inode *inode = NULL;
252 struct btrfs_root *root = NULL;
253 struct extent_map *em = NULL;
254 u64 orig_start;
255 u64 disk_bytenr;
256 u64 offset;
257 int ret = -ENOMEM;
258
259 inode = btrfs_new_test_inode();
260 if (!inode) {
261 test_msg("Couldn't allocate inode\n");
262 return ret;
263 }
264
265 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
266 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
267 BTRFS_I(inode)->location.offset = 0;
268
269 root = btrfs_alloc_dummy_root();
270 if (IS_ERR(root)) {
271 test_msg("Couldn't allocate root\n");
272 goto out;
273 }
274
275 /*
276 * We do this since btrfs_get_extent wants to assign em->bdev to
277 * root->fs_info->fs_devices->latest_bdev.
278 */
279 root->fs_info = alloc_dummy_fs_info();
280 if (!root->fs_info) {
281 test_msg("Couldn't allocate dummy fs info\n");
282 goto out;
283 }
284
285 root->node = alloc_dummy_extent_buffer(0, 4096);
286 if (!root->node) {
287 test_msg("Couldn't allocate dummy buffer\n");
288 goto out;
289 }
290
291 /*
292 * We will just free a dummy node if it's ref count is 2 so we need an
293 * extra ref so our searches don't accidently release our page.
294 */
295 extent_buffer_get(root->node);
296 btrfs_set_header_nritems(root->node, 0);
297 btrfs_set_header_level(root->node, 0);
298 ret = -EINVAL;
299
300 /* First with no extents */
301 BTRFS_I(inode)->root = root;
302 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
303 if (IS_ERR(em)) {
304 em = NULL;
305 test_msg("Got an error when we shouldn't have\n");
306 goto out;
307 }
308 if (em->block_start != EXTENT_MAP_HOLE) {
309 test_msg("Expected a hole, got %llu\n", em->block_start);
310 goto out;
311 }
312 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
313 test_msg("Vacancy flag wasn't set properly\n");
314 goto out;
315 }
316 free_extent_map(em);
317 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
318
319 /*
320 * All of the magic numbers are based on the mapping setup in
321 * setup_file_extents, so if you change anything there you need to
322 * update the comment and update the expected values below.
323 */
324 setup_file_extents(root);
325
326 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
327 if (IS_ERR(em)) {
328 test_msg("Got an error when we shouldn't have\n");
329 goto out;
330 }
331 if (em->block_start != EXTENT_MAP_HOLE) {
332 test_msg("Expected a hole, got %llu\n", em->block_start);
333 goto out;
334 }
335 if (em->start != 0 || em->len != 5) {
336 test_msg("Unexpected extent wanted start 0 len 5, got start "
337 "%llu len %llu\n", em->start, em->len);
338 goto out;
339 }
340 if (em->flags != 0) {
341 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
342 goto out;
343 }
344 offset = em->start + em->len;
345 free_extent_map(em);
346
347 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
348 if (IS_ERR(em)) {
349 test_msg("Got an error when we shouldn't have\n");
350 goto out;
351 }
352 if (em->block_start != EXTENT_MAP_INLINE) {
353 test_msg("Expected an inline, got %llu\n", em->block_start);
354 goto out;
355 }
356 if (em->start != offset || em->len != 4091) {
357 test_msg("Unexpected extent wanted start %llu len 1, got start "
358 "%llu len %llu\n", offset, em->start, em->len);
359 goto out;
360 }
361 if (em->flags != 0) {
362 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
363 goto out;
364 }
365 /*
366 * We don't test anything else for inline since it doesn't get set
367 * unless we have a page for it to write into. Maybe we should change
368 * this?
369 */
370 offset = em->start + em->len;
371 free_extent_map(em);
372
373 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
374 if (IS_ERR(em)) {
375 test_msg("Got an error when we shouldn't have\n");
376 goto out;
377 }
378 if (em->block_start != EXTENT_MAP_HOLE) {
379 test_msg("Expected a hole, got %llu\n", em->block_start);
380 goto out;
381 }
382 if (em->start != offset || em->len != 4) {
383 test_msg("Unexpected extent wanted start %llu len 4, got start "
384 "%llu len %llu\n", offset, em->start, em->len);
385 goto out;
386 }
387 if (em->flags != 0) {
388 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
389 goto out;
390 }
391 offset = em->start + em->len;
392 free_extent_map(em);
393
394 /* Regular extent */
395 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
396 if (IS_ERR(em)) {
397 test_msg("Got an error when we shouldn't have\n");
398 goto out;
399 }
400 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
401 test_msg("Expected a real extent, got %llu\n", em->block_start);
402 goto out;
403 }
404 if (em->start != offset || em->len != 4095) {
405 test_msg("Unexpected extent wanted start %llu len 4095, got "
406 "start %llu len %llu\n", offset, em->start, em->len);
407 goto out;
408 }
409 if (em->flags != 0) {
410 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
411 goto out;
412 }
413 if (em->orig_start != em->start) {
414 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
415 em->orig_start);
416 goto out;
417 }
418 offset = em->start + em->len;
419 free_extent_map(em);
420
421 /* The next 3 are split extents */
422 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
423 if (IS_ERR(em)) {
424 test_msg("Got an error when we shouldn't have\n");
425 goto out;
426 }
427 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
428 test_msg("Expected a real extent, got %llu\n", em->block_start);
429 goto out;
430 }
431 if (em->start != offset || em->len != 4096) {
432 test_msg("Unexpected extent wanted start %llu len 4096, got "
433 "start %llu len %llu\n", offset, em->start, em->len);
434 goto out;
435 }
436 if (em->flags != 0) {
437 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
438 goto out;
439 }
440 if (em->orig_start != em->start) {
441 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
442 em->orig_start);
443 goto out;
444 }
445 disk_bytenr = em->block_start;
446 orig_start = em->start;
447 offset = em->start + em->len;
448 free_extent_map(em);
449
450 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
451 if (IS_ERR(em)) {
452 test_msg("Got an error when we shouldn't have\n");
453 goto out;
454 }
455 if (em->block_start != EXTENT_MAP_HOLE) {
456 test_msg("Expected a hole, got %llu\n", em->block_start);
457 goto out;
458 }
459 if (em->start != offset || em->len != 4096) {
460 test_msg("Unexpected extent wanted start %llu len 4096, got "
461 "start %llu len %llu\n", offset, em->start, em->len);
462 goto out;
463 }
464 if (em->flags != 0) {
465 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
466 goto out;
467 }
468 offset = em->start + em->len;
469 free_extent_map(em);
470
471 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
472 if (IS_ERR(em)) {
473 test_msg("Got an error when we shouldn't have\n");
474 goto out;
475 }
476 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
477 test_msg("Expected a real extent, got %llu\n", em->block_start);
478 goto out;
479 }
480 if (em->start != offset || em->len != 8192) {
481 test_msg("Unexpected extent wanted start %llu len 8192, got "
482 "start %llu len %llu\n", offset, em->start, em->len);
483 goto out;
484 }
485 if (em->flags != 0) {
486 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
487 goto out;
488 }
489 if (em->orig_start != orig_start) {
490 test_msg("Wrong orig offset, want %llu, have %llu\n",
491 orig_start, em->orig_start);
492 goto out;
493 }
494 disk_bytenr += (em->start - orig_start);
495 if (em->block_start != disk_bytenr) {
496 test_msg("Wrong block start, want %llu, have %llu\n",
497 disk_bytenr, em->block_start);
498 goto out;
499 }
500 offset = em->start + em->len;
501 free_extent_map(em);
502
503 /* Prealloc extent */
504 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
505 if (IS_ERR(em)) {
506 test_msg("Got an error when we shouldn't have\n");
507 goto out;
508 }
509 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
510 test_msg("Expected a real extent, got %llu\n", em->block_start);
511 goto out;
512 }
513 if (em->start != offset || em->len != 4096) {
514 test_msg("Unexpected extent wanted start %llu len 4096, got "
515 "start %llu len %llu\n", offset, em->start, em->len);
516 goto out;
517 }
518 if (em->flags != prealloc_only) {
519 test_msg("Unexpected flags set, want %lu have %lu\n",
520 prealloc_only, em->flags);
521 goto out;
522 }
523 if (em->orig_start != em->start) {
524 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
525 em->orig_start);
526 goto out;
527 }
528 offset = em->start + em->len;
529 free_extent_map(em);
530
531 /* The next 3 are a half written prealloc extent */
532 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
533 if (IS_ERR(em)) {
534 test_msg("Got an error when we shouldn't have\n");
535 goto out;
536 }
537 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
538 test_msg("Expected a real extent, got %llu\n", em->block_start);
539 goto out;
540 }
541 if (em->start != offset || em->len != 4096) {
542 test_msg("Unexpected extent wanted start %llu len 4096, got "
543 "start %llu len %llu\n", offset, em->start, em->len);
544 goto out;
545 }
546 if (em->flags != prealloc_only) {
547 test_msg("Unexpected flags set, want %lu have %lu\n",
548 prealloc_only, em->flags);
549 goto out;
550 }
551 if (em->orig_start != em->start) {
552 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
553 em->orig_start);
554 goto out;
555 }
556 disk_bytenr = em->block_start;
557 orig_start = em->start;
558 offset = em->start + em->len;
559 free_extent_map(em);
560
561 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
562 if (IS_ERR(em)) {
563 test_msg("Got an error when we shouldn't have\n");
564 goto out;
565 }
566 if (em->block_start >= EXTENT_MAP_HOLE) {
567 test_msg("Expected a real extent, got %llu\n", em->block_start);
568 goto out;
569 }
570 if (em->start != offset || em->len != 4096) {
571 test_msg("Unexpected extent wanted start %llu len 4096, got "
572 "start %llu len %llu\n", offset, em->start, em->len);
573 goto out;
574 }
575 if (em->flags != 0) {
576 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
577 goto out;
578 }
579 if (em->orig_start != orig_start) {
580 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
581 orig_start, em->orig_start);
582 goto out;
583 }
584 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
585 test_msg("Unexpected block start, wanted %llu, have %llu\n",
586 disk_bytenr + (em->start - em->orig_start),
587 em->block_start);
588 goto out;
589 }
590 offset = em->start + em->len;
591 free_extent_map(em);
592
593 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
594 if (IS_ERR(em)) {
595 test_msg("Got an error when we shouldn't have\n");
596 goto out;
597 }
598 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
599 test_msg("Expected a real extent, got %llu\n", em->block_start);
600 goto out;
601 }
602 if (em->start != offset || em->len != 8192) {
603 test_msg("Unexpected extent wanted start %llu len 8192, got "
604 "start %llu len %llu\n", offset, em->start, em->len);
605 goto out;
606 }
607 if (em->flags != prealloc_only) {
608 test_msg("Unexpected flags set, want %lu have %lu\n",
609 prealloc_only, em->flags);
610 goto out;
611 }
612 if (em->orig_start != orig_start) {
613 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
614 em->orig_start);
615 goto out;
616 }
617 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
618 test_msg("Unexpected block start, wanted %llu, have %llu\n",
619 disk_bytenr + (em->start - em->orig_start),
620 em->block_start);
621 goto out;
622 }
623 offset = em->start + em->len;
624 free_extent_map(em);
625
626 /* Now for the compressed extent */
627 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
628 if (IS_ERR(em)) {
629 test_msg("Got an error when we shouldn't have\n");
630 goto out;
631 }
632 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
633 test_msg("Expected a real extent, got %llu\n", em->block_start);
634 goto out;
635 }
636 if (em->start != offset || em->len != 8192) {
637 test_msg("Unexpected extent wanted start %llu len 8192, got "
638 "start %llu len %llu\n", offset, em->start, em->len);
639 goto out;
640 }
641 if (em->flags != compressed_only) {
642 test_msg("Unexpected flags set, want %lu have %lu\n",
643 compressed_only, em->flags);
644 goto out;
645 }
646 if (em->orig_start != em->start) {
647 test_msg("Wrong orig offset, want %llu, have %llu\n",
648 em->start, em->orig_start);
649 goto out;
650 }
651 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
652 test_msg("Unexpected compress type, wanted %d, got %d\n",
653 BTRFS_COMPRESS_ZLIB, em->compress_type);
654 goto out;
655 }
656 offset = em->start + em->len;
657 free_extent_map(em);
658
659 /* Split compressed extent */
660 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
661 if (IS_ERR(em)) {
662 test_msg("Got an error when we shouldn't have\n");
663 goto out;
664 }
665 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
666 test_msg("Expected a real extent, got %llu\n", em->block_start);
667 goto out;
668 }
669 if (em->start != offset || em->len != 4096) {
670 test_msg("Unexpected extent wanted start %llu len 4096, got "
671 "start %llu len %llu\n", offset, em->start, em->len);
672 goto out;
673 }
674 if (em->flags != compressed_only) {
675 test_msg("Unexpected flags set, want %lu have %lu\n",
676 compressed_only, em->flags);
677 goto out;
678 }
679 if (em->orig_start != em->start) {
680 test_msg("Wrong orig offset, want %llu, have %llu\n",
681 em->start, em->orig_start);
682 goto out;
683 }
684 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
685 test_msg("Unexpected compress type, wanted %d, got %d\n",
686 BTRFS_COMPRESS_ZLIB, em->compress_type);
687 goto out;
688 }
689 disk_bytenr = em->block_start;
690 orig_start = em->start;
691 offset = em->start + em->len;
692 free_extent_map(em);
693
694 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
695 if (IS_ERR(em)) {
696 test_msg("Got an error when we shouldn't have\n");
697 goto out;
698 }
699 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
700 test_msg("Expected a real extent, got %llu\n", em->block_start);
701 goto out;
702 }
703 if (em->start != offset || em->len != 4096) {
704 test_msg("Unexpected extent wanted start %llu len 4096, got "
705 "start %llu len %llu\n", offset, em->start, em->len);
706 goto out;
707 }
708 if (em->flags != 0) {
709 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
710 goto out;
711 }
712 if (em->orig_start != em->start) {
713 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
714 em->orig_start);
715 goto out;
716 }
717 offset = em->start + em->len;
718 free_extent_map(em);
719
720 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
721 if (IS_ERR(em)) {
722 test_msg("Got an error when we shouldn't have\n");
723 goto out;
724 }
725 if (em->block_start != disk_bytenr) {
726 test_msg("Block start does not match, want %llu got %llu\n",
727 disk_bytenr, em->block_start);
728 goto out;
729 }
730 if (em->start != offset || em->len != 8192) {
731 test_msg("Unexpected extent wanted start %llu len 8192, got "
732 "start %llu len %llu\n", offset, em->start, em->len);
733 goto out;
734 }
735 if (em->flags != compressed_only) {
736 test_msg("Unexpected flags set, want %lu have %lu\n",
737 compressed_only, em->flags);
738 goto out;
739 }
740 if (em->orig_start != orig_start) {
741 test_msg("Wrong orig offset, want %llu, have %llu\n",
742 em->start, orig_start);
743 goto out;
744 }
745 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
746 test_msg("Unexpected compress type, wanted %d, got %d\n",
747 BTRFS_COMPRESS_ZLIB, em->compress_type);
748 goto out;
749 }
750 offset = em->start + em->len;
751 free_extent_map(em);
752
753 /* A hole between regular extents but no hole extent */
754 em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
755 if (IS_ERR(em)) {
756 test_msg("Got an error when we shouldn't have\n");
757 goto out;
758 }
759 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
760 test_msg("Expected a real extent, got %llu\n", em->block_start);
761 goto out;
762 }
763 if (em->start != offset || em->len != 4096) {
764 test_msg("Unexpected extent wanted start %llu len 4096, got "
765 "start %llu len %llu\n", offset, em->start, em->len);
766 goto out;
767 }
768 if (em->flags != 0) {
769 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
770 goto out;
771 }
772 if (em->orig_start != em->start) {
773 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
774 em->orig_start);
775 goto out;
776 }
777 offset = em->start + em->len;
778 free_extent_map(em);
779
780 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
781 if (IS_ERR(em)) {
782 test_msg("Got an error when we shouldn't have\n");
783 goto out;
784 }
785 if (em->block_start != EXTENT_MAP_HOLE) {
786 test_msg("Expected a hole extent, got %llu\n", em->block_start);
787 goto out;
788 }
789 /*
790 * Currently we just return a length that we requested rather than the
791 * length of the actual hole, if this changes we'll have to change this
792 * test.
793 */
794 if (em->start != offset || em->len != 12288) {
795 test_msg("Unexpected extent wanted start %llu len 12288, got "
796 "start %llu len %llu\n", offset, em->start, em->len);
797 goto out;
798 }
799 if (em->flags != vacancy_only) {
800 test_msg("Unexpected flags set, want %lu have %lu\n",
801 vacancy_only, em->flags);
802 goto out;
803 }
804 if (em->orig_start != em->start) {
805 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
806 em->orig_start);
807 goto out;
808 }
809 offset = em->start + em->len;
810 free_extent_map(em);
811
812 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
813 if (IS_ERR(em)) {
814 test_msg("Got an error when we shouldn't have\n");
815 goto out;
816 }
817 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
818 test_msg("Expected a real extent, got %llu\n", em->block_start);
819 goto out;
820 }
821 if (em->start != offset || em->len != 4096) {
822 test_msg("Unexpected extent wanted start %llu len 4096, got "
823 "start %llu len %llu\n", offset, em->start, em->len);
824 goto out;
825 }
826 if (em->flags != 0) {
827 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
828 goto out;
829 }
830 if (em->orig_start != em->start) {
831 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
832 em->orig_start);
833 goto out;
834 }
835 ret = 0;
836out:
837 if (!IS_ERR(em))
838 free_extent_map(em);
839 iput(inode);
840 free_dummy_root(root);
841 return ret;
842}
843
844static int test_hole_first(void)
845{
846 struct inode *inode = NULL;
847 struct btrfs_root *root = NULL;
848 struct extent_map *em = NULL;
849 int ret = -ENOMEM;
850
851 inode = btrfs_new_test_inode();
852 if (!inode) {
853 test_msg("Couldn't allocate inode\n");
854 return ret;
855 }
856
857 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
858 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
859 BTRFS_I(inode)->location.offset = 0;
860
861 root = btrfs_alloc_dummy_root();
862 if (IS_ERR(root)) {
863 test_msg("Couldn't allocate root\n");
864 goto out;
865 }
866
867 root->fs_info = alloc_dummy_fs_info();
868 if (!root->fs_info) {
869 test_msg("Couldn't allocate dummy fs info\n");
870 goto out;
871 }
872
873 root->node = alloc_dummy_extent_buffer(0, 4096);
874 if (!root->node) {
875 test_msg("Couldn't allocate dummy buffer\n");
876 goto out;
877 }
878
879 extent_buffer_get(root->node);
880 btrfs_set_header_nritems(root->node, 0);
881 btrfs_set_header_level(root->node, 0);
882 BTRFS_I(inode)->root = root;
883 ret = -EINVAL;
884
885 /*
886 * Need a blank inode item here just so we don't confuse
887 * btrfs_get_extent.
888 */
889 insert_inode_item_key(root);
890 insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
891 BTRFS_FILE_EXTENT_REG, 0, 1);
892 em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
893 if (IS_ERR(em)) {
894 test_msg("Got an error when we shouldn't have\n");
895 goto out;
896 }
897 if (em->block_start != EXTENT_MAP_HOLE) {
898 test_msg("Expected a hole, got %llu\n", em->block_start);
899 goto out;
900 }
901 if (em->start != 0 || em->len != 4096) {
902 test_msg("Unexpected extent wanted start 0 len 4096, got start "
903 "%llu len %llu\n", em->start, em->len);
904 goto out;
905 }
906 if (em->flags != vacancy_only) {
907 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
908 em->flags);
909 goto out;
910 }
911 free_extent_map(em);
912
913 em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
914 if (IS_ERR(em)) {
915 test_msg("Got an error when we shouldn't have\n");
916 goto out;
917 }
918 if (em->block_start != 4096) {
919 test_msg("Expected a real extent, got %llu\n", em->block_start);
920 goto out;
921 }
922 if (em->start != 4096 || em->len != 4096) {
923 test_msg("Unexpected extent wanted start 4096 len 4096, got "
924 "start %llu len %llu\n", em->start, em->len);
925 goto out;
926 }
927 if (em->flags != 0) {
928 test_msg("Unexpected flags set, wanted 0 got %lu\n",
929 em->flags);
930 goto out;
931 }
932 ret = 0;
933out:
934 if (!IS_ERR(em))
935 free_extent_map(em);
936 iput(inode);
937 free_dummy_root(root);
938 return ret;
939}
940
941int btrfs_test_inodes(void)
942{
943 int ret;
944
945 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
946 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
947 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
948
949 test_msg("Running btrfs_get_extent tests\n");
950 ret = test_btrfs_get_extent();
951 if (ret)
952 return ret;
953 test_msg("Running hole first btrfs_get_extent test\n");
954 return test_hole_first();
955}