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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 <linux/types.h>
20#include "btrfs-tests.h"
21#include "../ctree.h"
22#include "../btrfs_inode.h"
23#include "../disk-io.h"
24#include "../extent_io.h"
25#include "../volumes.h"
26#include "../compression.h"
27
28static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
29 u64 ram_bytes, u64 offset, u64 disk_bytenr,
30 u64 disk_len, u32 type, u8 compression, int slot)
31{
32 struct btrfs_path path;
33 struct btrfs_file_extent_item *fi;
34 struct extent_buffer *leaf = root->node;
35 struct btrfs_key key;
36 u32 value_len = sizeof(struct btrfs_file_extent_item);
37
38 if (type == BTRFS_FILE_EXTENT_INLINE)
39 value_len += len;
40 memset(&path, 0, sizeof(path));
41
42 path.nodes[0] = leaf;
43 path.slots[0] = slot;
44
45 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
46 key.type = BTRFS_EXTENT_DATA_KEY;
47 key.offset = start;
48
49 setup_items_for_insert(root, &path, &key, &value_len, value_len,
50 value_len + sizeof(struct btrfs_item), 1);
51 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
52 btrfs_set_file_extent_generation(leaf, fi, 1);
53 btrfs_set_file_extent_type(leaf, fi, type);
54 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
55 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
56 btrfs_set_file_extent_offset(leaf, fi, offset);
57 btrfs_set_file_extent_num_bytes(leaf, fi, len);
58 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
59 btrfs_set_file_extent_compression(leaf, fi, compression);
60 btrfs_set_file_extent_encryption(leaf, fi, 0);
61 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
62}
63
64static void insert_inode_item_key(struct btrfs_root *root)
65{
66 struct btrfs_path path;
67 struct extent_buffer *leaf = root->node;
68 struct btrfs_key key;
69 u32 value_len = 0;
70
71 memset(&path, 0, sizeof(path));
72
73 path.nodes[0] = leaf;
74 path.slots[0] = 0;
75
76 key.objectid = BTRFS_INODE_ITEM_KEY;
77 key.type = BTRFS_INODE_ITEM_KEY;
78 key.offset = 0;
79
80 setup_items_for_insert(root, &path, &key, &value_len, value_len,
81 value_len + sizeof(struct btrfs_item), 1);
82}
83
84/*
85 * Build the most complicated map of extents the earth has ever seen. We want
86 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
87 * diagram of how the extents will look though this may not be possible we still
88 * want to make sure everything acts normally (the last number is not inclusive)
89 *
90 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
91 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split]
92 *
93 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
94 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
95 *
96 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
97 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
98 *
99 * [69635-73731][ 73731 - 86019 ][86019-90115]
100 * [ regular ][ hole but no extent][ regular ]
101 */
102static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
103{
104 int slot = 0;
105 u64 disk_bytenr = SZ_1M;
106 u64 offset = 0;
107
108 /* First we want a hole */
109 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
110 slot);
111 slot++;
112 offset += 5;
113
114 /*
115 * Now we want an inline extent, I don't think this is possible but hey
116 * why not? Also keep in mind if we have an inline extent it counts as
117 * the whole first page. If we were to expand it we would have to cow
118 * and we wouldn't have an inline extent anymore.
119 */
120 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
121 slot);
122 slot++;
123 offset = sectorsize;
124
125 /* Now another hole */
126 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
127 slot);
128 slot++;
129 offset += 4;
130
131 /* Now for a regular extent */
132 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
133 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
134 slot++;
135 disk_bytenr += sectorsize;
136 offset += sectorsize - 1;
137
138 /*
139 * Now for 3 extents that were split from a hole punch so we test
140 * offsets properly.
141 */
142 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
143 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
144 slot++;
145 offset += sectorsize;
146 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
147 BTRFS_FILE_EXTENT_REG, 0, slot);
148 slot++;
149 offset += sectorsize;
150 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
151 2 * sectorsize, disk_bytenr, 4 * sectorsize,
152 BTRFS_FILE_EXTENT_REG, 0, slot);
153 slot++;
154 offset += 2 * sectorsize;
155 disk_bytenr += 4 * sectorsize;
156
157 /* Now for a unwritten prealloc extent */
158 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
159 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
160 slot++;
161 offset += sectorsize;
162
163 /*
164 * We want to jack up disk_bytenr a little more so the em stuff doesn't
165 * merge our records.
166 */
167 disk_bytenr += 2 * sectorsize;
168
169 /*
170 * Now for a partially written prealloc extent, basically the same as
171 * the hole punch example above. Ram_bytes never changes when you mark
172 * extents written btw.
173 */
174 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
175 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
176 slot++;
177 offset += sectorsize;
178 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
179 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
180 slot);
181 slot++;
182 offset += sectorsize;
183 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
184 2 * sectorsize, disk_bytenr, 4 * sectorsize,
185 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
186 slot++;
187 offset += 2 * sectorsize;
188 disk_bytenr += 4 * sectorsize;
189
190 /* Now a normal compressed extent */
191 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
192 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
193 BTRFS_COMPRESS_ZLIB, slot);
194 slot++;
195 offset += 2 * sectorsize;
196 /* No merges */
197 disk_bytenr += 2 * sectorsize;
198
199 /* Now a split compressed extent */
200 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
201 sectorsize, BTRFS_FILE_EXTENT_REG,
202 BTRFS_COMPRESS_ZLIB, slot);
203 slot++;
204 offset += sectorsize;
205 insert_extent(root, offset, sectorsize, sectorsize, 0,
206 disk_bytenr + sectorsize, sectorsize,
207 BTRFS_FILE_EXTENT_REG, 0, slot);
208 slot++;
209 offset += sectorsize;
210 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
211 2 * sectorsize, disk_bytenr, sectorsize,
212 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
213 slot++;
214 offset += 2 * sectorsize;
215 disk_bytenr += 2 * sectorsize;
216
217 /* Now extents that have a hole but no hole extent */
218 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
219 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
220 slot++;
221 offset += 4 * sectorsize;
222 disk_bytenr += sectorsize;
223 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
224 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
225}
226
227static unsigned long prealloc_only = 0;
228static unsigned long compressed_only = 0;
229static unsigned long vacancy_only = 0;
230
231static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
232{
233 struct btrfs_fs_info *fs_info = NULL;
234 struct inode *inode = NULL;
235 struct btrfs_root *root = NULL;
236 struct extent_map *em = NULL;
237 u64 orig_start;
238 u64 disk_bytenr;
239 u64 offset;
240 int ret = -ENOMEM;
241
242 inode = btrfs_new_test_inode();
243 if (!inode) {
244 test_msg("Couldn't allocate inode\n");
245 return ret;
246 }
247
248 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
249 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
250 BTRFS_I(inode)->location.offset = 0;
251
252 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
253 if (!fs_info) {
254 test_msg("Couldn't allocate dummy fs info\n");
255 goto out;
256 }
257
258 root = btrfs_alloc_dummy_root(fs_info);
259 if (IS_ERR(root)) {
260 test_msg("Couldn't allocate root\n");
261 goto out;
262 }
263
264 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
265 if (!root->node) {
266 test_msg("Couldn't allocate dummy buffer\n");
267 goto out;
268 }
269
270 /*
271 * We will just free a dummy node if it's ref count is 2 so we need an
272 * extra ref so our searches don't accidentally release our page.
273 */
274 extent_buffer_get(root->node);
275 btrfs_set_header_nritems(root->node, 0);
276 btrfs_set_header_level(root->node, 0);
277 ret = -EINVAL;
278
279 /* First with no extents */
280 BTRFS_I(inode)->root = root;
281 em = btrfs_get_extent(inode, NULL, 0, 0, sectorsize, 0);
282 if (IS_ERR(em)) {
283 em = NULL;
284 test_msg("Got an error when we shouldn't have\n");
285 goto out;
286 }
287 if (em->block_start != EXTENT_MAP_HOLE) {
288 test_msg("Expected a hole, got %llu\n", em->block_start);
289 goto out;
290 }
291 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
292 test_msg("Vacancy flag wasn't set properly\n");
293 goto out;
294 }
295 free_extent_map(em);
296 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
297
298 /*
299 * All of the magic numbers are based on the mapping setup in
300 * setup_file_extents, so if you change anything there you need to
301 * update the comment and update the expected values below.
302 */
303 setup_file_extents(root, sectorsize);
304
305 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
306 if (IS_ERR(em)) {
307 test_msg("Got an error when we shouldn't have\n");
308 goto out;
309 }
310 if (em->block_start != EXTENT_MAP_HOLE) {
311 test_msg("Expected a hole, got %llu\n", em->block_start);
312 goto out;
313 }
314 if (em->start != 0 || em->len != 5) {
315 test_msg("Unexpected extent wanted start 0 len 5, got start "
316 "%llu len %llu\n", em->start, em->len);
317 goto out;
318 }
319 if (em->flags != 0) {
320 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
321 goto out;
322 }
323 offset = em->start + em->len;
324 free_extent_map(em);
325
326 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 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_INLINE) {
332 test_msg("Expected an inline, got %llu\n", em->block_start);
333 goto out;
334 }
335
336 if (em->start != offset || em->len != (sectorsize - 5)) {
337 test_msg("Unexpected extent wanted start %llu len 1, got start "
338 "%llu len %llu\n", offset, em->start, em->len);
339 goto out;
340 }
341 if (em->flags != 0) {
342 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
343 goto out;
344 }
345 /*
346 * We don't test anything else for inline since it doesn't get set
347 * unless we have a page for it to write into. Maybe we should change
348 * this?
349 */
350 offset = em->start + em->len;
351 free_extent_map(em);
352
353 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
354 if (IS_ERR(em)) {
355 test_msg("Got an error when we shouldn't have\n");
356 goto out;
357 }
358 if (em->block_start != EXTENT_MAP_HOLE) {
359 test_msg("Expected a hole, got %llu\n", em->block_start);
360 goto out;
361 }
362 if (em->start != offset || em->len != 4) {
363 test_msg("Unexpected extent wanted start %llu len 4, got start "
364 "%llu len %llu\n", offset, em->start, em->len);
365 goto out;
366 }
367 if (em->flags != 0) {
368 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
369 goto out;
370 }
371 offset = em->start + em->len;
372 free_extent_map(em);
373
374 /* Regular extent */
375 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
376 if (IS_ERR(em)) {
377 test_msg("Got an error when we shouldn't have\n");
378 goto out;
379 }
380 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
381 test_msg("Expected a real extent, got %llu\n", em->block_start);
382 goto out;
383 }
384 if (em->start != offset || em->len != sectorsize - 1) {
385 test_msg("Unexpected extent wanted start %llu len 4095, got "
386 "start %llu len %llu\n", offset, em->start, em->len);
387 goto out;
388 }
389 if (em->flags != 0) {
390 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
391 goto out;
392 }
393 if (em->orig_start != em->start) {
394 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
395 em->orig_start);
396 goto out;
397 }
398 offset = em->start + em->len;
399 free_extent_map(em);
400
401 /* The next 3 are split extents */
402 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
403 if (IS_ERR(em)) {
404 test_msg("Got an error when we shouldn't have\n");
405 goto out;
406 }
407 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
408 test_msg("Expected a real extent, got %llu\n", em->block_start);
409 goto out;
410 }
411 if (em->start != offset || em->len != sectorsize) {
412 test_msg("Unexpected extent start %llu len %u, "
413 "got start %llu len %llu\n",
414 offset, sectorsize, em->start, em->len);
415 goto out;
416 }
417 if (em->flags != 0) {
418 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
419 goto out;
420 }
421 if (em->orig_start != em->start) {
422 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
423 em->orig_start);
424 goto out;
425 }
426 disk_bytenr = em->block_start;
427 orig_start = em->start;
428 offset = em->start + em->len;
429 free_extent_map(em);
430
431 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
432 if (IS_ERR(em)) {
433 test_msg("Got an error when we shouldn't have\n");
434 goto out;
435 }
436 if (em->block_start != EXTENT_MAP_HOLE) {
437 test_msg("Expected a hole, got %llu\n", em->block_start);
438 goto out;
439 }
440 if (em->start != offset || em->len != sectorsize) {
441 test_msg("Unexpected extent wanted start %llu len %u, "
442 "got start %llu len %llu\n",
443 offset, sectorsize, em->start, em->len);
444 goto out;
445 }
446 if (em->flags != 0) {
447 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
448 goto out;
449 }
450 offset = em->start + em->len;
451 free_extent_map(em);
452
453 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
454 if (IS_ERR(em)) {
455 test_msg("Got an error when we shouldn't have\n");
456 goto out;
457 }
458 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
459 test_msg("Expected a real extent, got %llu\n", em->block_start);
460 goto out;
461 }
462 if (em->start != offset || em->len != 2 * sectorsize) {
463 test_msg("Unexpected extent wanted start %llu len %u, "
464 "got start %llu len %llu\n",
465 offset, 2 * sectorsize, em->start, em->len);
466 goto out;
467 }
468 if (em->flags != 0) {
469 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
470 goto out;
471 }
472 if (em->orig_start != orig_start) {
473 test_msg("Wrong orig offset, want %llu, have %llu\n",
474 orig_start, em->orig_start);
475 goto out;
476 }
477 disk_bytenr += (em->start - orig_start);
478 if (em->block_start != disk_bytenr) {
479 test_msg("Wrong block start, want %llu, have %llu\n",
480 disk_bytenr, em->block_start);
481 goto out;
482 }
483 offset = em->start + em->len;
484 free_extent_map(em);
485
486 /* Prealloc extent */
487 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
488 if (IS_ERR(em)) {
489 test_msg("Got an error when we shouldn't have\n");
490 goto out;
491 }
492 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
493 test_msg("Expected a real extent, got %llu\n", em->block_start);
494 goto out;
495 }
496 if (em->start != offset || em->len != sectorsize) {
497 test_msg("Unexpected extent wanted start %llu len %u, "
498 "got start %llu len %llu\n",
499 offset, sectorsize, em->start, em->len);
500 goto out;
501 }
502 if (em->flags != prealloc_only) {
503 test_msg("Unexpected flags set, want %lu have %lu\n",
504 prealloc_only, em->flags);
505 goto out;
506 }
507 if (em->orig_start != em->start) {
508 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
509 em->orig_start);
510 goto out;
511 }
512 offset = em->start + em->len;
513 free_extent_map(em);
514
515 /* The next 3 are a half written prealloc extent */
516 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
517 if (IS_ERR(em)) {
518 test_msg("Got an error when we shouldn't have\n");
519 goto out;
520 }
521 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
522 test_msg("Expected a real extent, got %llu\n", em->block_start);
523 goto out;
524 }
525 if (em->start != offset || em->len != sectorsize) {
526 test_msg("Unexpected extent wanted start %llu len %u, "
527 "got start %llu len %llu\n",
528 offset, sectorsize, em->start, em->len);
529 goto out;
530 }
531 if (em->flags != prealloc_only) {
532 test_msg("Unexpected flags set, want %lu have %lu\n",
533 prealloc_only, em->flags);
534 goto out;
535 }
536 if (em->orig_start != em->start) {
537 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
538 em->orig_start);
539 goto out;
540 }
541 disk_bytenr = em->block_start;
542 orig_start = em->start;
543 offset = em->start + em->len;
544 free_extent_map(em);
545
546 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
547 if (IS_ERR(em)) {
548 test_msg("Got an error when we shouldn't have\n");
549 goto out;
550 }
551 if (em->block_start >= EXTENT_MAP_HOLE) {
552 test_msg("Expected a real extent, got %llu\n", em->block_start);
553 goto out;
554 }
555 if (em->start != offset || em->len != sectorsize) {
556 test_msg("Unexpected extent wanted start %llu len %u, "
557 "got start %llu len %llu\n",
558 offset, sectorsize, em->start, em->len);
559 goto out;
560 }
561 if (em->flags != 0) {
562 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
563 goto out;
564 }
565 if (em->orig_start != orig_start) {
566 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
567 orig_start, em->orig_start);
568 goto out;
569 }
570 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
571 test_msg("Unexpected block start, wanted %llu, have %llu\n",
572 disk_bytenr + (em->start - em->orig_start),
573 em->block_start);
574 goto out;
575 }
576 offset = em->start + em->len;
577 free_extent_map(em);
578
579 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
580 if (IS_ERR(em)) {
581 test_msg("Got an error when we shouldn't have\n");
582 goto out;
583 }
584 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
585 test_msg("Expected a real extent, got %llu\n", em->block_start);
586 goto out;
587 }
588 if (em->start != offset || em->len != 2 * sectorsize) {
589 test_msg("Unexpected extent wanted start %llu len %u, "
590 "got start %llu len %llu\n",
591 offset, 2 * sectorsize, em->start, em->len);
592 goto out;
593 }
594 if (em->flags != prealloc_only) {
595 test_msg("Unexpected flags set, want %lu have %lu\n",
596 prealloc_only, em->flags);
597 goto out;
598 }
599 if (em->orig_start != orig_start) {
600 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
601 em->orig_start);
602 goto out;
603 }
604 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
605 test_msg("Unexpected block start, wanted %llu, have %llu\n",
606 disk_bytenr + (em->start - em->orig_start),
607 em->block_start);
608 goto out;
609 }
610 offset = em->start + em->len;
611 free_extent_map(em);
612
613 /* Now for the compressed extent */
614 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
615 if (IS_ERR(em)) {
616 test_msg("Got an error when we shouldn't have\n");
617 goto out;
618 }
619 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
620 test_msg("Expected a real extent, got %llu\n", em->block_start);
621 goto out;
622 }
623 if (em->start != offset || em->len != 2 * sectorsize) {
624 test_msg("Unexpected extent wanted start %llu len %u,"
625 "got start %llu len %llu\n",
626 offset, 2 * sectorsize, em->start, em->len);
627 goto out;
628 }
629 if (em->flags != compressed_only) {
630 test_msg("Unexpected flags set, want %lu have %lu\n",
631 compressed_only, em->flags);
632 goto out;
633 }
634 if (em->orig_start != em->start) {
635 test_msg("Wrong orig offset, want %llu, have %llu\n",
636 em->start, em->orig_start);
637 goto out;
638 }
639 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
640 test_msg("Unexpected compress type, wanted %d, got %d\n",
641 BTRFS_COMPRESS_ZLIB, em->compress_type);
642 goto out;
643 }
644 offset = em->start + em->len;
645 free_extent_map(em);
646
647 /* Split compressed extent */
648 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
649 if (IS_ERR(em)) {
650 test_msg("Got an error when we shouldn't have\n");
651 goto out;
652 }
653 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
654 test_msg("Expected a real extent, got %llu\n", em->block_start);
655 goto out;
656 }
657 if (em->start != offset || em->len != sectorsize) {
658 test_msg("Unexpected extent wanted start %llu len %u,"
659 "got start %llu len %llu\n",
660 offset, sectorsize, em->start, em->len);
661 goto out;
662 }
663 if (em->flags != compressed_only) {
664 test_msg("Unexpected flags set, want %lu have %lu\n",
665 compressed_only, em->flags);
666 goto out;
667 }
668 if (em->orig_start != em->start) {
669 test_msg("Wrong orig offset, want %llu, have %llu\n",
670 em->start, em->orig_start);
671 goto out;
672 }
673 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
674 test_msg("Unexpected compress type, wanted %d, got %d\n",
675 BTRFS_COMPRESS_ZLIB, em->compress_type);
676 goto out;
677 }
678 disk_bytenr = em->block_start;
679 orig_start = em->start;
680 offset = em->start + em->len;
681 free_extent_map(em);
682
683 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
684 if (IS_ERR(em)) {
685 test_msg("Got an error when we shouldn't have\n");
686 goto out;
687 }
688 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
689 test_msg("Expected a real extent, got %llu\n", em->block_start);
690 goto out;
691 }
692 if (em->start != offset || em->len != sectorsize) {
693 test_msg("Unexpected extent wanted start %llu len %u, "
694 "got start %llu len %llu\n",
695 offset, sectorsize, em->start, em->len);
696 goto out;
697 }
698 if (em->flags != 0) {
699 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
700 goto out;
701 }
702 if (em->orig_start != em->start) {
703 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
704 em->orig_start);
705 goto out;
706 }
707 offset = em->start + em->len;
708 free_extent_map(em);
709
710 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
711 if (IS_ERR(em)) {
712 test_msg("Got an error when we shouldn't have\n");
713 goto out;
714 }
715 if (em->block_start != disk_bytenr) {
716 test_msg("Block start does not match, want %llu got %llu\n",
717 disk_bytenr, em->block_start);
718 goto out;
719 }
720 if (em->start != offset || em->len != 2 * sectorsize) {
721 test_msg("Unexpected extent wanted start %llu len %u, "
722 "got start %llu len %llu\n",
723 offset, 2 * sectorsize, em->start, em->len);
724 goto out;
725 }
726 if (em->flags != compressed_only) {
727 test_msg("Unexpected flags set, want %lu have %lu\n",
728 compressed_only, em->flags);
729 goto out;
730 }
731 if (em->orig_start != orig_start) {
732 test_msg("Wrong orig offset, want %llu, have %llu\n",
733 em->start, orig_start);
734 goto out;
735 }
736 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
737 test_msg("Unexpected compress type, wanted %d, got %d\n",
738 BTRFS_COMPRESS_ZLIB, em->compress_type);
739 goto out;
740 }
741 offset = em->start + em->len;
742 free_extent_map(em);
743
744 /* A hole between regular extents but no hole extent */
745 em = btrfs_get_extent(inode, NULL, 0, offset + 6, sectorsize, 0);
746 if (IS_ERR(em)) {
747 test_msg("Got an error when we shouldn't have\n");
748 goto out;
749 }
750 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
751 test_msg("Expected a real extent, got %llu\n", em->block_start);
752 goto out;
753 }
754 if (em->start != offset || em->len != sectorsize) {
755 test_msg("Unexpected extent wanted start %llu len %u, "
756 "got start %llu len %llu\n",
757 offset, sectorsize, em->start, em->len);
758 goto out;
759 }
760 if (em->flags != 0) {
761 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
762 goto out;
763 }
764 if (em->orig_start != em->start) {
765 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
766 em->orig_start);
767 goto out;
768 }
769 offset = em->start + em->len;
770 free_extent_map(em);
771
772 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
773 if (IS_ERR(em)) {
774 test_msg("Got an error when we shouldn't have\n");
775 goto out;
776 }
777 if (em->block_start != EXTENT_MAP_HOLE) {
778 test_msg("Expected a hole extent, got %llu\n", em->block_start);
779 goto out;
780 }
781 /*
782 * Currently we just return a length that we requested rather than the
783 * length of the actual hole, if this changes we'll have to change this
784 * test.
785 */
786 if (em->start != offset || em->len != 3 * sectorsize) {
787 test_msg("Unexpected extent wanted start %llu len %u, "
788 "got start %llu len %llu\n",
789 offset, 3 * sectorsize, em->start, em->len);
790 goto out;
791 }
792 if (em->flags != vacancy_only) {
793 test_msg("Unexpected flags set, want %lu have %lu\n",
794 vacancy_only, em->flags);
795 goto out;
796 }
797 if (em->orig_start != em->start) {
798 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
799 em->orig_start);
800 goto out;
801 }
802 offset = em->start + em->len;
803 free_extent_map(em);
804
805 em = btrfs_get_extent(inode, NULL, 0, offset, sectorsize, 0);
806 if (IS_ERR(em)) {
807 test_msg("Got an error when we shouldn't have\n");
808 goto out;
809 }
810 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
811 test_msg("Expected a real extent, got %llu\n", em->block_start);
812 goto out;
813 }
814 if (em->start != offset || em->len != sectorsize) {
815 test_msg("Unexpected extent wanted start %llu len %u,"
816 "got start %llu len %llu\n",
817 offset, sectorsize, em->start, em->len);
818 goto out;
819 }
820 if (em->flags != 0) {
821 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
822 goto out;
823 }
824 if (em->orig_start != em->start) {
825 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
826 em->orig_start);
827 goto out;
828 }
829 ret = 0;
830out:
831 if (!IS_ERR(em))
832 free_extent_map(em);
833 iput(inode);
834 btrfs_free_dummy_root(root);
835 btrfs_free_dummy_fs_info(fs_info);
836 return ret;
837}
838
839static int test_hole_first(u32 sectorsize, u32 nodesize)
840{
841 struct btrfs_fs_info *fs_info = NULL;
842 struct inode *inode = NULL;
843 struct btrfs_root *root = NULL;
844 struct extent_map *em = NULL;
845 int ret = -ENOMEM;
846
847 inode = btrfs_new_test_inode();
848 if (!inode) {
849 test_msg("Couldn't allocate inode\n");
850 return ret;
851 }
852
853 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
854 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
855 BTRFS_I(inode)->location.offset = 0;
856
857 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
858 if (!fs_info) {
859 test_msg("Couldn't allocate dummy fs info\n");
860 goto out;
861 }
862
863 root = btrfs_alloc_dummy_root(fs_info);
864 if (IS_ERR(root)) {
865 test_msg("Couldn't allocate root\n");
866 goto out;
867 }
868
869 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
870 if (!root->node) {
871 test_msg("Couldn't allocate dummy buffer\n");
872 goto out;
873 }
874
875 extent_buffer_get(root->node);
876 btrfs_set_header_nritems(root->node, 0);
877 btrfs_set_header_level(root->node, 0);
878 BTRFS_I(inode)->root = root;
879 ret = -EINVAL;
880
881 /*
882 * Need a blank inode item here just so we don't confuse
883 * btrfs_get_extent.
884 */
885 insert_inode_item_key(root);
886 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
887 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
888 em = btrfs_get_extent(inode, NULL, 0, 0, 2 * sectorsize, 0);
889 if (IS_ERR(em)) {
890 test_msg("Got an error when we shouldn't have\n");
891 goto out;
892 }
893 if (em->block_start != EXTENT_MAP_HOLE) {
894 test_msg("Expected a hole, got %llu\n", em->block_start);
895 goto out;
896 }
897 if (em->start != 0 || em->len != sectorsize) {
898 test_msg("Unexpected extent wanted start 0 len %u, "
899 "got start %llu len %llu\n",
900 sectorsize, em->start, em->len);
901 goto out;
902 }
903 if (em->flags != vacancy_only) {
904 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
905 em->flags);
906 goto out;
907 }
908 free_extent_map(em);
909
910 em = btrfs_get_extent(inode, NULL, 0, sectorsize, 2 * sectorsize, 0);
911 if (IS_ERR(em)) {
912 test_msg("Got an error when we shouldn't have\n");
913 goto out;
914 }
915 if (em->block_start != sectorsize) {
916 test_msg("Expected a real extent, got %llu\n", em->block_start);
917 goto out;
918 }
919 if (em->start != sectorsize || em->len != sectorsize) {
920 test_msg("Unexpected extent wanted start %u len %u, "
921 "got start %llu len %llu\n",
922 sectorsize, sectorsize, em->start, em->len);
923 goto out;
924 }
925 if (em->flags != 0) {
926 test_msg("Unexpected flags set, wanted 0 got %lu\n",
927 em->flags);
928 goto out;
929 }
930 ret = 0;
931out:
932 if (!IS_ERR(em))
933 free_extent_map(em);
934 iput(inode);
935 btrfs_free_dummy_root(root);
936 btrfs_free_dummy_fs_info(fs_info);
937 return ret;
938}
939
940static int test_extent_accounting(u32 sectorsize, u32 nodesize)
941{
942 struct btrfs_fs_info *fs_info = NULL;
943 struct inode *inode = NULL;
944 struct btrfs_root *root = NULL;
945 int ret = -ENOMEM;
946
947 inode = btrfs_new_test_inode();
948 if (!inode) {
949 test_msg("Couldn't allocate inode\n");
950 return ret;
951 }
952
953 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
954 if (!fs_info) {
955 test_msg("Couldn't allocate dummy fs info\n");
956 goto out;
957 }
958
959 root = btrfs_alloc_dummy_root(fs_info);
960 if (IS_ERR(root)) {
961 test_msg("Couldn't allocate root\n");
962 goto out;
963 }
964
965 BTRFS_I(inode)->root = root;
966 btrfs_test_inode_set_ops(inode);
967
968 /* [BTRFS_MAX_EXTENT_SIZE] */
969 BTRFS_I(inode)->outstanding_extents++;
970 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1,
971 NULL, 0);
972 if (ret) {
973 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
974 goto out;
975 }
976 if (BTRFS_I(inode)->outstanding_extents != 1) {
977 ret = -EINVAL;
978 test_msg("Miscount, wanted 1, got %u\n",
979 BTRFS_I(inode)->outstanding_extents);
980 goto out;
981 }
982
983 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
984 BTRFS_I(inode)->outstanding_extents++;
985 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE,
986 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
987 NULL, 0);
988 if (ret) {
989 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
990 goto out;
991 }
992 if (BTRFS_I(inode)->outstanding_extents != 2) {
993 ret = -EINVAL;
994 test_msg("Miscount, wanted 2, got %u\n",
995 BTRFS_I(inode)->outstanding_extents);
996 goto out;
997 }
998
999 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
1000 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1001 BTRFS_MAX_EXTENT_SIZE >> 1,
1002 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
1003 EXTENT_DELALLOC | EXTENT_DIRTY |
1004 EXTENT_UPTODATE | EXTENT_DO_ACCOUNTING, 0, 0,
1005 NULL, GFP_KERNEL);
1006 if (ret) {
1007 test_msg("clear_extent_bit returned %d\n", ret);
1008 goto out;
1009 }
1010 if (BTRFS_I(inode)->outstanding_extents != 2) {
1011 ret = -EINVAL;
1012 test_msg("Miscount, wanted 2, got %u\n",
1013 BTRFS_I(inode)->outstanding_extents);
1014 goto out;
1015 }
1016
1017 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
1018 BTRFS_I(inode)->outstanding_extents++;
1019 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1,
1020 (BTRFS_MAX_EXTENT_SIZE >> 1)
1021 + sectorsize - 1,
1022 NULL, 0);
1023 if (ret) {
1024 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1025 goto out;
1026 }
1027 if (BTRFS_I(inode)->outstanding_extents != 2) {
1028 ret = -EINVAL;
1029 test_msg("Miscount, wanted 2, got %u\n",
1030 BTRFS_I(inode)->outstanding_extents);
1031 goto out;
1032 }
1033
1034 /*
1035 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1036 *
1037 * I'm artificially adding 2 to outstanding_extents because in the
1038 * buffered IO case we'd add things up as we go, but I don't feel like
1039 * doing that here, this isn't the interesting case we want to test.
1040 */
1041 BTRFS_I(inode)->outstanding_extents += 2;
1042 ret = btrfs_set_extent_delalloc(inode,
1043 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1044 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1045 NULL, 0);
1046 if (ret) {
1047 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1048 goto out;
1049 }
1050 if (BTRFS_I(inode)->outstanding_extents != 4) {
1051 ret = -EINVAL;
1052 test_msg("Miscount, wanted 4, got %u\n",
1053 BTRFS_I(inode)->outstanding_extents);
1054 goto out;
1055 }
1056
1057 /*
1058 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1059 */
1060 BTRFS_I(inode)->outstanding_extents++;
1061 ret = btrfs_set_extent_delalloc(inode,
1062 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1063 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
1064 if (ret) {
1065 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1066 goto out;
1067 }
1068 if (BTRFS_I(inode)->outstanding_extents != 3) {
1069 ret = -EINVAL;
1070 test_msg("Miscount, wanted 3, got %u\n",
1071 BTRFS_I(inode)->outstanding_extents);
1072 goto out;
1073 }
1074
1075 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1076 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1077 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1078 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1079 EXTENT_DIRTY | EXTENT_DELALLOC |
1080 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1081 NULL, GFP_KERNEL);
1082 if (ret) {
1083 test_msg("clear_extent_bit returned %d\n", ret);
1084 goto out;
1085 }
1086 if (BTRFS_I(inode)->outstanding_extents != 4) {
1087 ret = -EINVAL;
1088 test_msg("Miscount, wanted 4, got %u\n",
1089 BTRFS_I(inode)->outstanding_extents);
1090 goto out;
1091 }
1092
1093 /*
1094 * Refill the hole again just for good measure, because I thought it
1095 * might fail and I'd rather satisfy my paranoia at this point.
1096 */
1097 BTRFS_I(inode)->outstanding_extents++;
1098 ret = btrfs_set_extent_delalloc(inode,
1099 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1100 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, NULL, 0);
1101 if (ret) {
1102 test_msg("btrfs_set_extent_delalloc returned %d\n", ret);
1103 goto out;
1104 }
1105 if (BTRFS_I(inode)->outstanding_extents != 3) {
1106 ret = -EINVAL;
1107 test_msg("Miscount, wanted 3, got %u\n",
1108 BTRFS_I(inode)->outstanding_extents);
1109 goto out;
1110 }
1111
1112 /* Empty */
1113 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1114 EXTENT_DIRTY | EXTENT_DELALLOC |
1115 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1116 NULL, GFP_KERNEL);
1117 if (ret) {
1118 test_msg("clear_extent_bit returned %d\n", ret);
1119 goto out;
1120 }
1121 if (BTRFS_I(inode)->outstanding_extents) {
1122 ret = -EINVAL;
1123 test_msg("Miscount, wanted 0, got %u\n",
1124 BTRFS_I(inode)->outstanding_extents);
1125 goto out;
1126 }
1127 ret = 0;
1128out:
1129 if (ret)
1130 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1131 EXTENT_DIRTY | EXTENT_DELALLOC |
1132 EXTENT_DO_ACCOUNTING | EXTENT_UPTODATE, 0, 0,
1133 NULL, GFP_KERNEL);
1134 iput(inode);
1135 btrfs_free_dummy_root(root);
1136 btrfs_free_dummy_fs_info(fs_info);
1137 return ret;
1138}
1139
1140int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1141{
1142 int ret;
1143
1144 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
1145 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
1146 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
1147
1148 test_msg("Running btrfs_get_extent tests\n");
1149 ret = test_btrfs_get_extent(sectorsize, nodesize);
1150 if (ret)
1151 return ret;
1152 test_msg("Running hole first btrfs_get_extent test\n");
1153 ret = test_hole_first(sectorsize, nodesize);
1154 if (ret)
1155 return ret;
1156 test_msg("Running outstanding_extents tests\n");
1157 return test_extent_accounting(sectorsize, nodesize);
1158}