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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#include "../compression.h"
26
27static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
28 u64 ram_bytes, u64 offset, u64 disk_bytenr,
29 u64 disk_len, u32 type, u8 compression, int slot)
30{
31 struct btrfs_path path;
32 struct btrfs_file_extent_item *fi;
33 struct extent_buffer *leaf = root->node;
34 struct btrfs_key key;
35 u32 value_len = sizeof(struct btrfs_file_extent_item);
36
37 if (type == BTRFS_FILE_EXTENT_INLINE)
38 value_len += len;
39 memset(&path, 0, sizeof(path));
40
41 path.nodes[0] = leaf;
42 path.slots[0] = slot;
43
44 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
45 key.type = BTRFS_EXTENT_DATA_KEY;
46 key.offset = start;
47
48 setup_items_for_insert(root, &path, &key, &value_len, value_len,
49 value_len + sizeof(struct btrfs_item), 1);
50 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
51 btrfs_set_file_extent_generation(leaf, fi, 1);
52 btrfs_set_file_extent_type(leaf, fi, type);
53 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
54 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
55 btrfs_set_file_extent_offset(leaf, fi, offset);
56 btrfs_set_file_extent_num_bytes(leaf, fi, len);
57 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
58 btrfs_set_file_extent_compression(leaf, fi, compression);
59 btrfs_set_file_extent_encryption(leaf, fi, 0);
60 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
61}
62
63static void insert_inode_item_key(struct btrfs_root *root)
64{
65 struct btrfs_path path;
66 struct extent_buffer *leaf = root->node;
67 struct btrfs_key key;
68 u32 value_len = 0;
69
70 memset(&path, 0, sizeof(path));
71
72 path.nodes[0] = leaf;
73 path.slots[0] = 0;
74
75 key.objectid = BTRFS_INODE_ITEM_KEY;
76 key.type = BTRFS_INODE_ITEM_KEY;
77 key.offset = 0;
78
79 setup_items_for_insert(root, &path, &key, &value_len, value_len,
80 value_len + sizeof(struct btrfs_item), 1);
81}
82
83/*
84 * Build the most complicated map of extents the earth has ever seen. We want
85 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
86 * diagram of how the extents will look though this may not be possible we still
87 * want to make sure everything acts normally (the last number is not inclusive)
88 *
89 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
90 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
91 *
92 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
93 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
94 *
95 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
96 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
97 *
98 * [81920-86016]
99 * [ regular ]
100 */
101static void setup_file_extents(struct btrfs_root *root)
102{
103 int slot = 0;
104 u64 disk_bytenr = SZ_1M;
105 u64 offset = 0;
106
107 /* First we want a hole */
108 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
109 slot);
110 slot++;
111 offset += 5;
112
113 /*
114 * Now we want an inline extent, I don't think this is possible but hey
115 * why not? Also keep in mind if we have an inline extent it counts as
116 * the whole first page. If we were to expand it we would have to cow
117 * and we wouldn't have an inline extent anymore.
118 */
119 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
120 slot);
121 slot++;
122 offset = 4096;
123
124 /* Now another hole */
125 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
126 slot);
127 slot++;
128 offset += 4;
129
130 /* Now for a regular extent */
131 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
132 BTRFS_FILE_EXTENT_REG, 0, slot);
133 slot++;
134 disk_bytenr += 4096;
135 offset += 4095;
136
137 /*
138 * Now for 3 extents that were split from a hole punch so we test
139 * offsets properly.
140 */
141 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
142 BTRFS_FILE_EXTENT_REG, 0, slot);
143 slot++;
144 offset += 4096;
145 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
146 0, slot);
147 slot++;
148 offset += 4096;
149 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
150 BTRFS_FILE_EXTENT_REG, 0, slot);
151 slot++;
152 offset += 8192;
153 disk_bytenr += 16384;
154
155 /* Now for a unwritten prealloc extent */
156 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
157 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
158 slot++;
159 offset += 4096;
160
161 /*
162 * We want to jack up disk_bytenr a little more so the em stuff doesn't
163 * merge our records.
164 */
165 disk_bytenr += 8192;
166
167 /*
168 * Now for a partially written prealloc extent, basically the same as
169 * the hole punch example above. Ram_bytes never changes when you mark
170 * extents written btw.
171 */
172 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
173 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
174 slot++;
175 offset += 4096;
176 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
177 BTRFS_FILE_EXTENT_REG, 0, slot);
178 slot++;
179 offset += 4096;
180 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
181 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
182 slot++;
183 offset += 8192;
184 disk_bytenr += 16384;
185
186 /* Now a normal compressed extent */
187 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
188 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
189 slot++;
190 offset += 8192;
191 /* No merges */
192 disk_bytenr += 8192;
193
194 /* Now a split compressed extent */
195 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
196 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
197 slot++;
198 offset += 4096;
199 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
200 BTRFS_FILE_EXTENT_REG, 0, slot);
201 slot++;
202 offset += 4096;
203 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
204 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
205 slot++;
206 offset += 8192;
207 disk_bytenr += 8192;
208
209 /* Now extents that have a hole but no hole extent */
210 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
211 BTRFS_FILE_EXTENT_REG, 0, slot);
212 slot++;
213 offset += 16384;
214 disk_bytenr += 4096;
215 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
216 BTRFS_FILE_EXTENT_REG, 0, slot);
217}
218
219static unsigned long prealloc_only = 0;
220static unsigned long compressed_only = 0;
221static unsigned long vacancy_only = 0;
222
223static noinline int test_btrfs_get_extent(void)
224{
225 struct inode *inode = NULL;
226 struct btrfs_root *root = NULL;
227 struct extent_map *em = NULL;
228 u64 orig_start;
229 u64 disk_bytenr;
230 u64 offset;
231 int ret = -ENOMEM;
232
233 inode = btrfs_new_test_inode();
234 if (!inode) {
235 test_msg("Couldn't allocate inode\n");
236 return ret;
237 }
238
239 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
240 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
241 BTRFS_I(inode)->location.offset = 0;
242
243 root = btrfs_alloc_dummy_root();
244 if (IS_ERR(root)) {
245 test_msg("Couldn't allocate root\n");
246 goto out;
247 }
248
249 /*
250 * We do this since btrfs_get_extent wants to assign em->bdev to
251 * root->fs_info->fs_devices->latest_bdev.
252 */
253 root->fs_info = btrfs_alloc_dummy_fs_info();
254 if (!root->fs_info) {
255 test_msg("Couldn't allocate dummy fs info\n");
256 goto out;
257 }
258
259 root->node = alloc_dummy_extent_buffer(NULL, 4096);
260 if (!root->node) {
261 test_msg("Couldn't allocate dummy buffer\n");
262 goto out;
263 }
264
265 /*
266 * We will just free a dummy node if it's ref count is 2 so we need an
267 * extra ref so our searches don't accidently release our page.
268 */
269 extent_buffer_get(root->node);
270 btrfs_set_header_nritems(root->node, 0);
271 btrfs_set_header_level(root->node, 0);
272 ret = -EINVAL;
273
274 /* First with no extents */
275 BTRFS_I(inode)->root = root;
276 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
277 if (IS_ERR(em)) {
278 em = NULL;
279 test_msg("Got an error when we shouldn't have\n");
280 goto out;
281 }
282 if (em->block_start != EXTENT_MAP_HOLE) {
283 test_msg("Expected a hole, got %llu\n", em->block_start);
284 goto out;
285 }
286 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
287 test_msg("Vacancy flag wasn't set properly\n");
288 goto out;
289 }
290 free_extent_map(em);
291 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
292
293 /*
294 * All of the magic numbers are based on the mapping setup in
295 * setup_file_extents, so if you change anything there you need to
296 * update the comment and update the expected values below.
297 */
298 setup_file_extents(root);
299
300 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
301 if (IS_ERR(em)) {
302 test_msg("Got an error when we shouldn't have\n");
303 goto out;
304 }
305 if (em->block_start != EXTENT_MAP_HOLE) {
306 test_msg("Expected a hole, got %llu\n", em->block_start);
307 goto out;
308 }
309 if (em->start != 0 || em->len != 5) {
310 test_msg("Unexpected extent wanted start 0 len 5, got start "
311 "%llu len %llu\n", em->start, em->len);
312 goto out;
313 }
314 if (em->flags != 0) {
315 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
316 goto out;
317 }
318 offset = em->start + em->len;
319 free_extent_map(em);
320
321 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
322 if (IS_ERR(em)) {
323 test_msg("Got an error when we shouldn't have\n");
324 goto out;
325 }
326 if (em->block_start != EXTENT_MAP_INLINE) {
327 test_msg("Expected an inline, got %llu\n", em->block_start);
328 goto out;
329 }
330 if (em->start != offset || em->len != 4091) {
331 test_msg("Unexpected extent wanted start %llu len 1, got start "
332 "%llu len %llu\n", offset, em->start, em->len);
333 goto out;
334 }
335 if (em->flags != 0) {
336 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
337 goto out;
338 }
339 /*
340 * We don't test anything else for inline since it doesn't get set
341 * unless we have a page for it to write into. Maybe we should change
342 * this?
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_HOLE) {
353 test_msg("Expected a hole, got %llu\n", em->block_start);
354 goto out;
355 }
356 if (em->start != offset || em->len != 4) {
357 test_msg("Unexpected extent wanted start %llu len 4, 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 offset = em->start + em->len;
366 free_extent_map(em);
367
368 /* Regular extent */
369 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
370 if (IS_ERR(em)) {
371 test_msg("Got an error when we shouldn't have\n");
372 goto out;
373 }
374 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
375 test_msg("Expected a real extent, got %llu\n", em->block_start);
376 goto out;
377 }
378 if (em->start != offset || em->len != 4095) {
379 test_msg("Unexpected extent wanted start %llu len 4095, got "
380 "start %llu len %llu\n", offset, em->start, em->len);
381 goto out;
382 }
383 if (em->flags != 0) {
384 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
385 goto out;
386 }
387 if (em->orig_start != em->start) {
388 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
389 em->orig_start);
390 goto out;
391 }
392 offset = em->start + em->len;
393 free_extent_map(em);
394
395 /* The next 3 are split extents */
396 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
397 if (IS_ERR(em)) {
398 test_msg("Got an error when we shouldn't have\n");
399 goto out;
400 }
401 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
402 test_msg("Expected a real extent, got %llu\n", em->block_start);
403 goto out;
404 }
405 if (em->start != offset || em->len != 4096) {
406 test_msg("Unexpected extent wanted start %llu len 4096, got "
407 "start %llu len %llu\n", offset, em->start, em->len);
408 goto out;
409 }
410 if (em->flags != 0) {
411 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
412 goto out;
413 }
414 if (em->orig_start != em->start) {
415 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
416 em->orig_start);
417 goto out;
418 }
419 disk_bytenr = em->block_start;
420 orig_start = em->start;
421 offset = em->start + em->len;
422 free_extent_map(em);
423
424 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
425 if (IS_ERR(em)) {
426 test_msg("Got an error when we shouldn't have\n");
427 goto out;
428 }
429 if (em->block_start != EXTENT_MAP_HOLE) {
430 test_msg("Expected a hole, got %llu\n", em->block_start);
431 goto out;
432 }
433 if (em->start != offset || em->len != 4096) {
434 test_msg("Unexpected extent wanted start %llu len 4096, got "
435 "start %llu len %llu\n", offset, em->start, em->len);
436 goto out;
437 }
438 if (em->flags != 0) {
439 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
440 goto out;
441 }
442 offset = em->start + em->len;
443 free_extent_map(em);
444
445 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
446 if (IS_ERR(em)) {
447 test_msg("Got an error when we shouldn't have\n");
448 goto out;
449 }
450 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
451 test_msg("Expected a real extent, got %llu\n", em->block_start);
452 goto out;
453 }
454 if (em->start != offset || em->len != 8192) {
455 test_msg("Unexpected extent wanted start %llu len 8192, got "
456 "start %llu len %llu\n", offset, em->start, em->len);
457 goto out;
458 }
459 if (em->flags != 0) {
460 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
461 goto out;
462 }
463 if (em->orig_start != orig_start) {
464 test_msg("Wrong orig offset, want %llu, have %llu\n",
465 orig_start, em->orig_start);
466 goto out;
467 }
468 disk_bytenr += (em->start - orig_start);
469 if (em->block_start != disk_bytenr) {
470 test_msg("Wrong block start, want %llu, have %llu\n",
471 disk_bytenr, em->block_start);
472 goto out;
473 }
474 offset = em->start + em->len;
475 free_extent_map(em);
476
477 /* Prealloc extent */
478 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
479 if (IS_ERR(em)) {
480 test_msg("Got an error when we shouldn't have\n");
481 goto out;
482 }
483 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
484 test_msg("Expected a real extent, got %llu\n", em->block_start);
485 goto out;
486 }
487 if (em->start != offset || em->len != 4096) {
488 test_msg("Unexpected extent wanted start %llu len 4096, got "
489 "start %llu len %llu\n", offset, em->start, em->len);
490 goto out;
491 }
492 if (em->flags != prealloc_only) {
493 test_msg("Unexpected flags set, want %lu have %lu\n",
494 prealloc_only, em->flags);
495 goto out;
496 }
497 if (em->orig_start != em->start) {
498 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
499 em->orig_start);
500 goto out;
501 }
502 offset = em->start + em->len;
503 free_extent_map(em);
504
505 /* The next 3 are a half written prealloc extent */
506 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
507 if (IS_ERR(em)) {
508 test_msg("Got an error when we shouldn't have\n");
509 goto out;
510 }
511 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
512 test_msg("Expected a real extent, got %llu\n", em->block_start);
513 goto out;
514 }
515 if (em->start != offset || em->len != 4096) {
516 test_msg("Unexpected extent wanted start %llu len 4096, got "
517 "start %llu len %llu\n", offset, em->start, em->len);
518 goto out;
519 }
520 if (em->flags != prealloc_only) {
521 test_msg("Unexpected flags set, want %lu have %lu\n",
522 prealloc_only, em->flags);
523 goto out;
524 }
525 if (em->orig_start != em->start) {
526 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
527 em->orig_start);
528 goto out;
529 }
530 disk_bytenr = em->block_start;
531 orig_start = em->start;
532 offset = em->start + em->len;
533 free_extent_map(em);
534
535 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
536 if (IS_ERR(em)) {
537 test_msg("Got an error when we shouldn't have\n");
538 goto out;
539 }
540 if (em->block_start >= EXTENT_MAP_HOLE) {
541 test_msg("Expected a real extent, got %llu\n", em->block_start);
542 goto out;
543 }
544 if (em->start != offset || em->len != 4096) {
545 test_msg("Unexpected extent wanted start %llu len 4096, got "
546 "start %llu len %llu\n", offset, em->start, em->len);
547 goto out;
548 }
549 if (em->flags != 0) {
550 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
551 goto out;
552 }
553 if (em->orig_start != orig_start) {
554 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
555 orig_start, em->orig_start);
556 goto out;
557 }
558 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
559 test_msg("Unexpected block start, wanted %llu, have %llu\n",
560 disk_bytenr + (em->start - em->orig_start),
561 em->block_start);
562 goto out;
563 }
564 offset = em->start + em->len;
565 free_extent_map(em);
566
567 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
568 if (IS_ERR(em)) {
569 test_msg("Got an error when we shouldn't have\n");
570 goto out;
571 }
572 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
573 test_msg("Expected a real extent, got %llu\n", em->block_start);
574 goto out;
575 }
576 if (em->start != offset || em->len != 8192) {
577 test_msg("Unexpected extent wanted start %llu len 8192, got "
578 "start %llu len %llu\n", offset, em->start, em->len);
579 goto out;
580 }
581 if (em->flags != prealloc_only) {
582 test_msg("Unexpected flags set, want %lu have %lu\n",
583 prealloc_only, em->flags);
584 goto out;
585 }
586 if (em->orig_start != orig_start) {
587 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
588 em->orig_start);
589 goto out;
590 }
591 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
592 test_msg("Unexpected block start, wanted %llu, have %llu\n",
593 disk_bytenr + (em->start - em->orig_start),
594 em->block_start);
595 goto out;
596 }
597 offset = em->start + em->len;
598 free_extent_map(em);
599
600 /* Now for the compressed extent */
601 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
602 if (IS_ERR(em)) {
603 test_msg("Got an error when we shouldn't have\n");
604 goto out;
605 }
606 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
607 test_msg("Expected a real extent, got %llu\n", em->block_start);
608 goto out;
609 }
610 if (em->start != offset || em->len != 8192) {
611 test_msg("Unexpected extent wanted start %llu len 8192, got "
612 "start %llu len %llu\n", offset, em->start, em->len);
613 goto out;
614 }
615 if (em->flags != compressed_only) {
616 test_msg("Unexpected flags set, want %lu have %lu\n",
617 compressed_only, em->flags);
618 goto out;
619 }
620 if (em->orig_start != em->start) {
621 test_msg("Wrong orig offset, want %llu, have %llu\n",
622 em->start, em->orig_start);
623 goto out;
624 }
625 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
626 test_msg("Unexpected compress type, wanted %d, got %d\n",
627 BTRFS_COMPRESS_ZLIB, em->compress_type);
628 goto out;
629 }
630 offset = em->start + em->len;
631 free_extent_map(em);
632
633 /* Split compressed extent */
634 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
635 if (IS_ERR(em)) {
636 test_msg("Got an error when we shouldn't have\n");
637 goto out;
638 }
639 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
640 test_msg("Expected a real extent, got %llu\n", em->block_start);
641 goto out;
642 }
643 if (em->start != offset || em->len != 4096) {
644 test_msg("Unexpected extent wanted start %llu len 4096, got "
645 "start %llu len %llu\n", offset, em->start, em->len);
646 goto out;
647 }
648 if (em->flags != compressed_only) {
649 test_msg("Unexpected flags set, want %lu have %lu\n",
650 compressed_only, em->flags);
651 goto out;
652 }
653 if (em->orig_start != em->start) {
654 test_msg("Wrong orig offset, want %llu, have %llu\n",
655 em->start, em->orig_start);
656 goto out;
657 }
658 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
659 test_msg("Unexpected compress type, wanted %d, got %d\n",
660 BTRFS_COMPRESS_ZLIB, em->compress_type);
661 goto out;
662 }
663 disk_bytenr = em->block_start;
664 orig_start = em->start;
665 offset = em->start + em->len;
666 free_extent_map(em);
667
668 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
669 if (IS_ERR(em)) {
670 test_msg("Got an error when we shouldn't have\n");
671 goto out;
672 }
673 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
674 test_msg("Expected a real extent, got %llu\n", em->block_start);
675 goto out;
676 }
677 if (em->start != offset || em->len != 4096) {
678 test_msg("Unexpected extent wanted start %llu len 4096, got "
679 "start %llu len %llu\n", offset, em->start, em->len);
680 goto out;
681 }
682 if (em->flags != 0) {
683 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
684 goto out;
685 }
686 if (em->orig_start != em->start) {
687 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
688 em->orig_start);
689 goto out;
690 }
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 != disk_bytenr) {
700 test_msg("Block start does not match, want %llu got %llu\n",
701 disk_bytenr, em->block_start);
702 goto out;
703 }
704 if (em->start != offset || em->len != 8192) {
705 test_msg("Unexpected extent wanted start %llu len 8192, got "
706 "start %llu len %llu\n", offset, 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(inode, NULL, 0, offset + 6, 4096, 0);
729 if (IS_ERR(em)) {
730 test_msg("Got an error when we shouldn't have\n");
731 goto out;
732 }
733 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
734 test_msg("Expected a real extent, got %llu\n", em->block_start);
735 goto out;
736 }
737 if (em->start != offset || em->len != 4096) {
738 test_msg("Unexpected extent wanted start %llu len 4096, got "
739 "start %llu len %llu\n", offset, em->start, em->len);
740 goto out;
741 }
742 if (em->flags != 0) {
743 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
744 goto out;
745 }
746 if (em->orig_start != em->start) {
747 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
748 em->orig_start);
749 goto out;
750 }
751 offset = em->start + em->len;
752 free_extent_map(em);
753
754 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 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_HOLE) {
760 test_msg("Expected a hole extent, got %llu\n", em->block_start);
761 goto out;
762 }
763 /*
764 * Currently we just return a length that we requested rather than the
765 * length of the actual hole, if this changes we'll have to change this
766 * test.
767 */
768 if (em->start != offset || em->len != 12288) {
769 test_msg("Unexpected extent wanted start %llu len 12288, got "
770 "start %llu len %llu\n", offset, em->start, em->len);
771 goto out;
772 }
773 if (em->flags != vacancy_only) {
774 test_msg("Unexpected flags set, want %lu have %lu\n",
775 vacancy_only, em->flags);
776 goto out;
777 }
778 if (em->orig_start != em->start) {
779 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
780 em->orig_start);
781 goto out;
782 }
783 offset = em->start + em->len;
784 free_extent_map(em);
785
786 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
787 if (IS_ERR(em)) {
788 test_msg("Got an error when we shouldn't have\n");
789 goto out;
790 }
791 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
792 test_msg("Expected a real extent, got %llu\n", em->block_start);
793 goto out;
794 }
795 if (em->start != offset || em->len != 4096) {
796 test_msg("Unexpected extent wanted start %llu len 4096, got "
797 "start %llu len %llu\n", offset, em->start, em->len);
798 goto out;
799 }
800 if (em->flags != 0) {
801 test_msg("Unexpected flags set, want 0 have %lu\n", 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 ret = 0;
810out:
811 if (!IS_ERR(em))
812 free_extent_map(em);
813 iput(inode);
814 btrfs_free_dummy_root(root);
815 return ret;
816}
817
818static int test_hole_first(void)
819{
820 struct inode *inode = NULL;
821 struct btrfs_root *root = NULL;
822 struct extent_map *em = NULL;
823 int ret = -ENOMEM;
824
825 inode = btrfs_new_test_inode();
826 if (!inode) {
827 test_msg("Couldn't allocate inode\n");
828 return ret;
829 }
830
831 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
832 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
833 BTRFS_I(inode)->location.offset = 0;
834
835 root = btrfs_alloc_dummy_root();
836 if (IS_ERR(root)) {
837 test_msg("Couldn't allocate root\n");
838 goto out;
839 }
840
841 root->fs_info = btrfs_alloc_dummy_fs_info();
842 if (!root->fs_info) {
843 test_msg("Couldn't allocate dummy fs info\n");
844 goto out;
845 }
846
847 root->node = alloc_dummy_extent_buffer(NULL, 4096);
848 if (!root->node) {
849 test_msg("Couldn't allocate dummy buffer\n");
850 goto out;
851 }
852
853 extent_buffer_get(root->node);
854 btrfs_set_header_nritems(root->node, 0);
855 btrfs_set_header_level(root->node, 0);
856 BTRFS_I(inode)->root = root;
857 ret = -EINVAL;
858
859 /*
860 * Need a blank inode item here just so we don't confuse
861 * btrfs_get_extent.
862 */
863 insert_inode_item_key(root);
864 insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
865 BTRFS_FILE_EXTENT_REG, 0, 1);
866 em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
867 if (IS_ERR(em)) {
868 test_msg("Got an error when we shouldn't have\n");
869 goto out;
870 }
871 if (em->block_start != EXTENT_MAP_HOLE) {
872 test_msg("Expected a hole, got %llu\n", em->block_start);
873 goto out;
874 }
875 if (em->start != 0 || em->len != 4096) {
876 test_msg("Unexpected extent wanted start 0 len 4096, got start "
877 "%llu len %llu\n", em->start, em->len);
878 goto out;
879 }
880 if (em->flags != vacancy_only) {
881 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
882 em->flags);
883 goto out;
884 }
885 free_extent_map(em);
886
887 em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
888 if (IS_ERR(em)) {
889 test_msg("Got an error when we shouldn't have\n");
890 goto out;
891 }
892 if (em->block_start != 4096) {
893 test_msg("Expected a real extent, got %llu\n", em->block_start);
894 goto out;
895 }
896 if (em->start != 4096 || em->len != 4096) {
897 test_msg("Unexpected extent wanted start 4096 len 4096, got "
898 "start %llu len %llu\n", em->start, em->len);
899 goto out;
900 }
901 if (em->flags != 0) {
902 test_msg("Unexpected flags set, wanted 0 got %lu\n",
903 em->flags);
904 goto out;
905 }
906 ret = 0;
907out:
908 if (!IS_ERR(em))
909 free_extent_map(em);
910 iput(inode);
911 btrfs_free_dummy_root(root);
912 return ret;
913}
914
915static int test_extent_accounting(void)
916{
917 struct inode *inode = NULL;
918 struct btrfs_root *root = NULL;
919 int ret = -ENOMEM;
920
921 inode = btrfs_new_test_inode();
922 if (!inode) {
923 test_msg("Couldn't allocate inode\n");
924 return ret;
925 }
926
927 root = btrfs_alloc_dummy_root();
928 if (IS_ERR(root)) {
929 test_msg("Couldn't allocate root\n");
930 goto out;
931 }
932
933 root->fs_info = btrfs_alloc_dummy_fs_info();
934 if (!root->fs_info) {
935 test_msg("Couldn't allocate dummy fs info\n");
936 goto out;
937 }
938
939 BTRFS_I(inode)->root = root;
940 btrfs_test_inode_set_ops(inode);
941
942 /* [BTRFS_MAX_EXTENT_SIZE] */
943 BTRFS_I(inode)->outstanding_extents++;
944 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
945 NULL);
946 if (ret) {
947 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
948 goto out;
949 }
950 if (BTRFS_I(inode)->outstanding_extents != 1) {
951 ret = -EINVAL;
952 test_msg("Miscount, wanted 1, got %u\n",
953 BTRFS_I(inode)->outstanding_extents);
954 goto out;
955 }
956
957 /* [BTRFS_MAX_EXTENT_SIZE][4k] */
958 BTRFS_I(inode)->outstanding_extents++;
959 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
960 BTRFS_MAX_EXTENT_SIZE + 4095, NULL);
961 if (ret) {
962 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
963 goto out;
964 }
965 if (BTRFS_I(inode)->outstanding_extents != 2) {
966 ret = -EINVAL;
967 test_msg("Miscount, wanted 2, got %u\n",
968 BTRFS_I(inode)->outstanding_extents);
969 goto out;
970 }
971
972 /* [BTRFS_MAX_EXTENT_SIZE/2][4K HOLE][the rest] */
973 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
974 BTRFS_MAX_EXTENT_SIZE >> 1,
975 (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
976 EXTENT_DELALLOC | EXTENT_DIRTY |
977 EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
978 NULL, GFP_KERNEL);
979 if (ret) {
980 test_msg("clear_extent_bit returned %d\n", ret);
981 goto out;
982 }
983 if (BTRFS_I(inode)->outstanding_extents != 2) {
984 ret = -EINVAL;
985 test_msg("Miscount, wanted 2, got %u\n",
986 BTRFS_I(inode)->outstanding_extents);
987 goto out;
988 }
989
990 /* [BTRFS_MAX_EXTENT_SIZE][4K] */
991 BTRFS_I(inode)->outstanding_extents++;
992 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
993 (BTRFS_MAX_EXTENT_SIZE >> 1) + 4095,
994 NULL);
995 if (ret) {
996 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
997 goto out;
998 }
999 if (BTRFS_I(inode)->outstanding_extents != 2) {
1000 ret = -EINVAL;
1001 test_msg("Miscount, wanted 2, got %u\n",
1002 BTRFS_I(inode)->outstanding_extents);
1003 goto out;
1004 }
1005
1006 /*
1007 * [BTRFS_MAX_EXTENT_SIZE+4K][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4K]
1008 *
1009 * I'm artificially adding 2 to outstanding_extents because in the
1010 * buffered IO case we'd add things up as we go, but I don't feel like
1011 * doing that here, this isn't the interesting case we want to test.
1012 */
1013 BTRFS_I(inode)->outstanding_extents += 2;
1014 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE + 8192,
1015 (BTRFS_MAX_EXTENT_SIZE << 1) + 12287,
1016 NULL);
1017 if (ret) {
1018 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1019 goto out;
1020 }
1021 if (BTRFS_I(inode)->outstanding_extents != 4) {
1022 ret = -EINVAL;
1023 test_msg("Miscount, wanted 4, got %u\n",
1024 BTRFS_I(inode)->outstanding_extents);
1025 goto out;
1026 }
1027
1028 /* [BTRFS_MAX_EXTENT_SIZE+4k][4k][BTRFS_MAX_EXTENT_SIZE+4k] */
1029 BTRFS_I(inode)->outstanding_extents++;
1030 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
1031 BTRFS_MAX_EXTENT_SIZE+8191, NULL);
1032 if (ret) {
1033 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1034 goto out;
1035 }
1036 if (BTRFS_I(inode)->outstanding_extents != 3) {
1037 ret = -EINVAL;
1038 test_msg("Miscount, wanted 3, got %u\n",
1039 BTRFS_I(inode)->outstanding_extents);
1040 goto out;
1041 }
1042
1043 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1044 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1045 BTRFS_MAX_EXTENT_SIZE+4096,
1046 BTRFS_MAX_EXTENT_SIZE+8191,
1047 EXTENT_DIRTY | EXTENT_DELALLOC |
1048 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1049 NULL, GFP_KERNEL);
1050 if (ret) {
1051 test_msg("clear_extent_bit returned %d\n", ret);
1052 goto out;
1053 }
1054 if (BTRFS_I(inode)->outstanding_extents != 4) {
1055 ret = -EINVAL;
1056 test_msg("Miscount, wanted 4, got %u\n",
1057 BTRFS_I(inode)->outstanding_extents);
1058 goto out;
1059 }
1060
1061 /*
1062 * Refill the hole again just for good measure, because I thought it
1063 * might fail and I'd rather satisfy my paranoia at this point.
1064 */
1065 BTRFS_I(inode)->outstanding_extents++;
1066 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE+4096,
1067 BTRFS_MAX_EXTENT_SIZE+8191, NULL);
1068 if (ret) {
1069 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1070 goto out;
1071 }
1072 if (BTRFS_I(inode)->outstanding_extents != 3) {
1073 ret = -EINVAL;
1074 test_msg("Miscount, wanted 3, got %u\n",
1075 BTRFS_I(inode)->outstanding_extents);
1076 goto out;
1077 }
1078
1079 /* Empty */
1080 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1081 EXTENT_DIRTY | EXTENT_DELALLOC |
1082 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1083 NULL, GFP_KERNEL);
1084 if (ret) {
1085 test_msg("clear_extent_bit returned %d\n", ret);
1086 goto out;
1087 }
1088 if (BTRFS_I(inode)->outstanding_extents) {
1089 ret = -EINVAL;
1090 test_msg("Miscount, wanted 0, got %u\n",
1091 BTRFS_I(inode)->outstanding_extents);
1092 goto out;
1093 }
1094 ret = 0;
1095out:
1096 if (ret)
1097 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1098 EXTENT_DIRTY | EXTENT_DELALLOC |
1099 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1100 NULL, GFP_KERNEL);
1101 iput(inode);
1102 btrfs_free_dummy_root(root);
1103 return ret;
1104}
1105
1106int btrfs_test_inodes(void)
1107{
1108 int ret;
1109
1110 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1111 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
1112 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1113
1114 test_msg("Running btrfs_get_extent tests\n");
1115 ret = test_btrfs_get_extent();
1116 if (ret)
1117 return ret;
1118 test_msg("Running hole first btrfs_get_extent test\n");
1119 ret = test_hole_first();
1120 if (ret)
1121 return ret;
1122 test_msg("Running outstanding_extents tests\n");
1123 return test_extent_accounting();
1124}