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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 /*
38 * Passing a NULL trans handle is fine here, we have a dummy root eb
39 * and the tree is a single node (level 0).
40 */
41 btrfs_setup_item_for_insert(NULL, root, &path, &key, value_len);
42 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
43 btrfs_set_file_extent_generation(leaf, fi, 1);
44 btrfs_set_file_extent_type(leaf, fi, type);
45 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
46 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
47 btrfs_set_file_extent_offset(leaf, fi, offset);
48 btrfs_set_file_extent_num_bytes(leaf, fi, len);
49 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
50 btrfs_set_file_extent_compression(leaf, fi, compression);
51 btrfs_set_file_extent_encryption(leaf, fi, 0);
52 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
53}
54
55static void insert_inode_item_key(struct btrfs_root *root)
56{
57 struct btrfs_path path;
58 struct extent_buffer *leaf = root->node;
59 struct btrfs_key key;
60 u32 value_len = 0;
61
62 memset(&path, 0, sizeof(path));
63
64 path.nodes[0] = leaf;
65 path.slots[0] = 0;
66
67 key.objectid = BTRFS_INODE_ITEM_KEY;
68 key.type = BTRFS_INODE_ITEM_KEY;
69 key.offset = 0;
70
71 /*
72 * Passing a NULL trans handle is fine here, we have a dummy root eb
73 * and the tree is a single node (level 0).
74 */
75 btrfs_setup_item_for_insert(NULL, root, &path, &key, value_len);
76}
77
78/*
79 * Build the most complicated map of extents the earth has ever seen. We want
80 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
81 * diagram of how the extents will look though this may not be possible we still
82 * want to make sure everything acts normally (the last number is not inclusive)
83 *
84 * [0 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
85 * [inline][hole but no extent][ hole ][ regular ][regular1 split]
86 *
87 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
88 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
89 *
90 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
91 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
92 *
93 * [69635-73731][ 73731 - 86019 ][86019-90115]
94 * [ regular ][ hole but no extent][ regular ]
95 */
96static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
97{
98 int slot = 0;
99 u64 disk_bytenr = SZ_1M;
100 u64 offset = 0;
101
102 /*
103 * Tree-checker has strict limits on inline extents that they can only
104 * exist at file offset 0, thus we can only have one inline file extent
105 * at most.
106 */
107 insert_extent(root, offset, 6, 6, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
108 slot);
109 slot++;
110 offset = sectorsize;
111
112 /* Now another hole */
113 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
114 slot);
115 slot++;
116 offset += 4;
117
118 /* Now for a regular extent */
119 insert_extent(root, offset, sectorsize - 1, sectorsize - 1, 0,
120 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
121 slot++;
122 disk_bytenr += sectorsize;
123 offset += sectorsize - 1;
124
125 /*
126 * Now for 3 extents that were split from a hole punch so we test
127 * offsets properly.
128 */
129 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
130 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
131 slot++;
132 offset += sectorsize;
133 insert_extent(root, offset, sectorsize, sectorsize, 0, 0, 0,
134 BTRFS_FILE_EXTENT_REG, 0, slot);
135 slot++;
136 offset += sectorsize;
137 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
138 2 * sectorsize, disk_bytenr, 4 * sectorsize,
139 BTRFS_FILE_EXTENT_REG, 0, slot);
140 slot++;
141 offset += 2 * sectorsize;
142 disk_bytenr += 4 * sectorsize;
143
144 /* Now for a unwritten prealloc extent */
145 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
146 sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
147 slot++;
148 offset += sectorsize;
149
150 /*
151 * We want to jack up disk_bytenr a little more so the em stuff doesn't
152 * merge our records.
153 */
154 disk_bytenr += 2 * sectorsize;
155
156 /*
157 * Now for a partially written prealloc extent, basically the same as
158 * the hole punch example above. Ram_bytes never changes when you mark
159 * extents written btw.
160 */
161 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
162 4 * sectorsize, BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
163 slot++;
164 offset += sectorsize;
165 insert_extent(root, offset, sectorsize, 4 * sectorsize, sectorsize,
166 disk_bytenr, 4 * sectorsize, BTRFS_FILE_EXTENT_REG, 0,
167 slot);
168 slot++;
169 offset += sectorsize;
170 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
171 2 * sectorsize, disk_bytenr, 4 * sectorsize,
172 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
173 slot++;
174 offset += 2 * sectorsize;
175 disk_bytenr += 4 * sectorsize;
176
177 /* Now a normal compressed extent */
178 insert_extent(root, offset, 2 * sectorsize, 2 * sectorsize, 0,
179 disk_bytenr, sectorsize, BTRFS_FILE_EXTENT_REG,
180 BTRFS_COMPRESS_ZLIB, slot);
181 slot++;
182 offset += 2 * sectorsize;
183 /* No merges */
184 disk_bytenr += 2 * sectorsize;
185
186 /* Now a split compressed extent */
187 insert_extent(root, offset, sectorsize, 4 * sectorsize, 0, disk_bytenr,
188 sectorsize, BTRFS_FILE_EXTENT_REG,
189 BTRFS_COMPRESS_ZLIB, slot);
190 slot++;
191 offset += sectorsize;
192 insert_extent(root, offset, sectorsize, sectorsize, 0,
193 disk_bytenr + sectorsize, sectorsize,
194 BTRFS_FILE_EXTENT_REG, 0, slot);
195 slot++;
196 offset += sectorsize;
197 insert_extent(root, offset, 2 * sectorsize, 4 * sectorsize,
198 2 * sectorsize, disk_bytenr, sectorsize,
199 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
200 slot++;
201 offset += 2 * sectorsize;
202 disk_bytenr += 2 * sectorsize;
203
204 /* Now extents that have a hole but no hole extent */
205 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
206 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
207 slot++;
208 offset += 4 * sectorsize;
209 disk_bytenr += sectorsize;
210 insert_extent(root, offset, sectorsize, sectorsize, 0, disk_bytenr,
211 sectorsize, BTRFS_FILE_EXTENT_REG, 0, slot);
212}
213
214static u32 prealloc_only = 0;
215static u32 compressed_only = 0;
216static u32 vacancy_only = 0;
217
218static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
219{
220 struct btrfs_fs_info *fs_info = NULL;
221 struct inode *inode = NULL;
222 struct btrfs_root *root = NULL;
223 struct extent_map *em = NULL;
224 u64 orig_start;
225 u64 disk_bytenr;
226 u64 offset;
227 int ret = -ENOMEM;
228
229 test_msg("running btrfs_get_extent tests");
230
231 inode = btrfs_new_test_inode();
232 if (!inode) {
233 test_std_err(TEST_ALLOC_INODE);
234 return ret;
235 }
236
237 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
238 if (!fs_info) {
239 test_std_err(TEST_ALLOC_FS_INFO);
240 goto out;
241 }
242
243 root = btrfs_alloc_dummy_root(fs_info);
244 if (IS_ERR(root)) {
245 test_std_err(TEST_ALLOC_ROOT);
246 goto out;
247 }
248
249 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
250 if (!root->node) {
251 test_std_err(TEST_ALLOC_ROOT);
252 goto out;
253 }
254
255 btrfs_set_header_nritems(root->node, 0);
256 btrfs_set_header_level(root->node, 0);
257 ret = -EINVAL;
258
259 /* First with no extents */
260 BTRFS_I(inode)->root = root;
261 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize);
262 if (IS_ERR(em)) {
263 em = NULL;
264 test_err("got an error when we shouldn't have");
265 goto out;
266 }
267 if (em->block_start != EXTENT_MAP_HOLE) {
268 test_err("expected a hole, got %llu", em->block_start);
269 goto out;
270 }
271 free_extent_map(em);
272 btrfs_drop_extent_map_range(BTRFS_I(inode), 0, (u64)-1, false);
273
274 /*
275 * All of the magic numbers are based on the mapping setup in
276 * setup_file_extents, so if you change anything there you need to
277 * update the comment and update the expected values below.
278 */
279 setup_file_extents(root, sectorsize);
280
281 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1);
282 if (IS_ERR(em)) {
283 test_err("got an error when we shouldn't have");
284 goto out;
285 }
286 if (em->block_start != EXTENT_MAP_INLINE) {
287 test_err("expected an inline, got %llu", em->block_start);
288 goto out;
289 }
290
291 /*
292 * For inline extent, we always round up the em to sectorsize, as
293 * they are either:
294 *
295 * a) a hidden hole
296 * The range will be zeroed at inline extent read time.
297 *
298 * b) a file extent with unaligned bytenr
299 * Tree checker will reject it.
300 */
301 if (em->start != 0 || em->len != sectorsize) {
302 test_err(
303 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
304 sectorsize, em->start, em->len);
305 goto out;
306 }
307 if (em->flags != 0) {
308 test_err("unexpected flags set, want 0 have %u", em->flags);
309 goto out;
310 }
311 /*
312 * We don't test anything else for inline since it doesn't get set
313 * unless we have a page for it to write into. Maybe we should change
314 * this?
315 */
316 offset = em->start + em->len;
317 free_extent_map(em);
318
319 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
320 if (IS_ERR(em)) {
321 test_err("got an error when we shouldn't have");
322 goto out;
323 }
324 if (em->block_start != EXTENT_MAP_HOLE) {
325 test_err("expected a hole, got %llu", em->block_start);
326 goto out;
327 }
328 if (em->start != offset || em->len != 4) {
329 test_err(
330 "unexpected extent wanted start %llu len 4, got start %llu len %llu",
331 offset, em->start, em->len);
332 goto out;
333 }
334 if (em->flags != 0) {
335 test_err("unexpected flags set, want 0 have %u", em->flags);
336 goto out;
337 }
338 offset = em->start + em->len;
339 free_extent_map(em);
340
341 /* Regular extent */
342 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
343 if (IS_ERR(em)) {
344 test_err("got an error when we shouldn't have");
345 goto out;
346 }
347 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
348 test_err("expected a real extent, got %llu", em->block_start);
349 goto out;
350 }
351 if (em->start != offset || em->len != sectorsize - 1) {
352 test_err(
353 "unexpected extent wanted start %llu len 4095, got start %llu len %llu",
354 offset, em->start, em->len);
355 goto out;
356 }
357 if (em->flags != 0) {
358 test_err("unexpected flags set, want 0 have %u", em->flags);
359 goto out;
360 }
361 if (em->orig_start != em->start) {
362 test_err("wrong orig offset, want %llu, have %llu", em->start,
363 em->orig_start);
364 goto out;
365 }
366 offset = em->start + em->len;
367 free_extent_map(em);
368
369 /* The next 3 are split extents */
370 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
371 if (IS_ERR(em)) {
372 test_err("got an error when we shouldn't have");
373 goto out;
374 }
375 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
376 test_err("expected a real extent, got %llu", em->block_start);
377 goto out;
378 }
379 if (em->start != offset || em->len != sectorsize) {
380 test_err(
381 "unexpected extent start %llu len %u, got start %llu len %llu",
382 offset, sectorsize, em->start, em->len);
383 goto out;
384 }
385 if (em->flags != 0) {
386 test_err("unexpected flags set, want 0 have %u", em->flags);
387 goto out;
388 }
389 if (em->orig_start != em->start) {
390 test_err("wrong orig offset, want %llu, have %llu", em->start,
391 em->orig_start);
392 goto out;
393 }
394 disk_bytenr = em->block_start;
395 orig_start = em->start;
396 offset = em->start + em->len;
397 free_extent_map(em);
398
399 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
400 if (IS_ERR(em)) {
401 test_err("got an error when we shouldn't have");
402 goto out;
403 }
404 if (em->block_start != EXTENT_MAP_HOLE) {
405 test_err("expected a hole, got %llu", em->block_start);
406 goto out;
407 }
408 if (em->start != offset || em->len != sectorsize) {
409 test_err(
410 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
411 offset, sectorsize, em->start, em->len);
412 goto out;
413 }
414 if (em->flags != 0) {
415 test_err("unexpected flags set, want 0 have %u", em->flags);
416 goto out;
417 }
418 offset = em->start + em->len;
419 free_extent_map(em);
420
421 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
422 if (IS_ERR(em)) {
423 test_err("got an error when we shouldn't have");
424 goto out;
425 }
426 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
427 test_err("expected a real extent, got %llu", em->block_start);
428 goto out;
429 }
430 if (em->start != offset || em->len != 2 * sectorsize) {
431 test_err(
432 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
433 offset, 2 * sectorsize, em->start, em->len);
434 goto out;
435 }
436 if (em->flags != 0) {
437 test_err("unexpected flags set, want 0 have %u", em->flags);
438 goto out;
439 }
440 if (em->orig_start != orig_start) {
441 test_err("wrong orig offset, want %llu, have %llu",
442 orig_start, em->orig_start);
443 goto out;
444 }
445 disk_bytenr += (em->start - orig_start);
446 if (em->block_start != disk_bytenr) {
447 test_err("wrong block start, want %llu, have %llu",
448 disk_bytenr, em->block_start);
449 goto out;
450 }
451 offset = em->start + em->len;
452 free_extent_map(em);
453
454 /* Prealloc extent */
455 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
456 if (IS_ERR(em)) {
457 test_err("got an error when we shouldn't have");
458 goto out;
459 }
460 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
461 test_err("expected a real extent, got %llu", em->block_start);
462 goto out;
463 }
464 if (em->start != offset || em->len != sectorsize) {
465 test_err(
466 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
467 offset, sectorsize, em->start, em->len);
468 goto out;
469 }
470 if (em->flags != prealloc_only) {
471 test_err("unexpected flags set, want %u have %u",
472 prealloc_only, em->flags);
473 goto out;
474 }
475 if (em->orig_start != em->start) {
476 test_err("wrong orig offset, want %llu, have %llu", em->start,
477 em->orig_start);
478 goto out;
479 }
480 offset = em->start + em->len;
481 free_extent_map(em);
482
483 /* The next 3 are a half written prealloc extent */
484 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
485 if (IS_ERR(em)) {
486 test_err("got an error when we shouldn't have");
487 goto out;
488 }
489 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
490 test_err("expected a real extent, got %llu", em->block_start);
491 goto out;
492 }
493 if (em->start != offset || em->len != sectorsize) {
494 test_err(
495 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
496 offset, sectorsize, em->start, em->len);
497 goto out;
498 }
499 if (em->flags != prealloc_only) {
500 test_err("unexpected flags set, want %u have %u",
501 prealloc_only, em->flags);
502 goto out;
503 }
504 if (em->orig_start != em->start) {
505 test_err("wrong orig offset, want %llu, have %llu", em->start,
506 em->orig_start);
507 goto out;
508 }
509 disk_bytenr = em->block_start;
510 orig_start = em->start;
511 offset = em->start + em->len;
512 free_extent_map(em);
513
514 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
515 if (IS_ERR(em)) {
516 test_err("got an error when we shouldn't have");
517 goto out;
518 }
519 if (em->block_start >= EXTENT_MAP_HOLE) {
520 test_err("expected a real extent, got %llu", em->block_start);
521 goto out;
522 }
523 if (em->start != offset || em->len != sectorsize) {
524 test_err(
525 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
526 offset, sectorsize, em->start, em->len);
527 goto out;
528 }
529 if (em->flags != 0) {
530 test_err("unexpected flags set, want 0 have %u", em->flags);
531 goto out;
532 }
533 if (em->orig_start != orig_start) {
534 test_err("unexpected orig offset, wanted %llu, have %llu",
535 orig_start, em->orig_start);
536 goto out;
537 }
538 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
539 test_err("unexpected block start, wanted %llu, have %llu",
540 disk_bytenr + (em->start - em->orig_start),
541 em->block_start);
542 goto out;
543 }
544 offset = em->start + em->len;
545 free_extent_map(em);
546
547 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
548 if (IS_ERR(em)) {
549 test_err("got an error when we shouldn't have");
550 goto out;
551 }
552 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
553 test_err("expected a real extent, got %llu", em->block_start);
554 goto out;
555 }
556 if (em->start != offset || em->len != 2 * sectorsize) {
557 test_err(
558 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
559 offset, 2 * sectorsize, em->start, em->len);
560 goto out;
561 }
562 if (em->flags != prealloc_only) {
563 test_err("unexpected flags set, want %u have %u",
564 prealloc_only, em->flags);
565 goto out;
566 }
567 if (em->orig_start != orig_start) {
568 test_err("wrong orig offset, want %llu, have %llu", orig_start,
569 em->orig_start);
570 goto out;
571 }
572 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
573 test_err("unexpected block start, wanted %llu, have %llu",
574 disk_bytenr + (em->start - em->orig_start),
575 em->block_start);
576 goto out;
577 }
578 offset = em->start + em->len;
579 free_extent_map(em);
580
581 /* Now for the compressed extent */
582 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
583 if (IS_ERR(em)) {
584 test_err("got an error when we shouldn't have");
585 goto out;
586 }
587 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
588 test_err("expected a real extent, got %llu", em->block_start);
589 goto out;
590 }
591 if (em->start != offset || em->len != 2 * sectorsize) {
592 test_err(
593 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
594 offset, 2 * sectorsize, em->start, em->len);
595 goto out;
596 }
597 if (em->flags != compressed_only) {
598 test_err("unexpected flags set, want %u have %u",
599 compressed_only, em->flags);
600 goto out;
601 }
602 if (em->orig_start != em->start) {
603 test_err("wrong orig offset, want %llu, have %llu",
604 em->start, em->orig_start);
605 goto out;
606 }
607 if (extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
608 test_err("unexpected compress type, wanted %d, got %d",
609 BTRFS_COMPRESS_ZLIB, extent_map_compression(em));
610 goto out;
611 }
612 offset = em->start + em->len;
613 free_extent_map(em);
614
615 /* Split compressed extent */
616 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
617 if (IS_ERR(em)) {
618 test_err("got an error when we shouldn't have");
619 goto out;
620 }
621 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
622 test_err("expected a real extent, got %llu", em->block_start);
623 goto out;
624 }
625 if (em->start != offset || em->len != sectorsize) {
626 test_err(
627 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
628 offset, sectorsize, em->start, em->len);
629 goto out;
630 }
631 if (em->flags != compressed_only) {
632 test_err("unexpected flags set, want %u have %u",
633 compressed_only, em->flags);
634 goto out;
635 }
636 if (em->orig_start != em->start) {
637 test_err("wrong orig offset, want %llu, have %llu",
638 em->start, em->orig_start);
639 goto out;
640 }
641 if (extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
642 test_err("unexpected compress type, wanted %d, got %d",
643 BTRFS_COMPRESS_ZLIB, extent_map_compression(em));
644 goto out;
645 }
646 disk_bytenr = em->block_start;
647 orig_start = em->start;
648 offset = em->start + em->len;
649 free_extent_map(em);
650
651 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
652 if (IS_ERR(em)) {
653 test_err("got an error when we shouldn't have");
654 goto out;
655 }
656 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
657 test_err("expected a real extent, got %llu", em->block_start);
658 goto out;
659 }
660 if (em->start != offset || em->len != sectorsize) {
661 test_err(
662 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
663 offset, sectorsize, em->start, em->len);
664 goto out;
665 }
666 if (em->flags != 0) {
667 test_err("unexpected flags set, want 0 have %u", em->flags);
668 goto out;
669 }
670 if (em->orig_start != em->start) {
671 test_err("wrong orig offset, want %llu, have %llu", em->start,
672 em->orig_start);
673 goto out;
674 }
675 offset = em->start + em->len;
676 free_extent_map(em);
677
678 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
679 if (IS_ERR(em)) {
680 test_err("got an error when we shouldn't have");
681 goto out;
682 }
683 if (em->block_start != disk_bytenr) {
684 test_err("block start does not match, want %llu got %llu",
685 disk_bytenr, em->block_start);
686 goto out;
687 }
688 if (em->start != offset || em->len != 2 * sectorsize) {
689 test_err(
690 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
691 offset, 2 * sectorsize, em->start, em->len);
692 goto out;
693 }
694 if (em->flags != compressed_only) {
695 test_err("unexpected flags set, want %u have %u",
696 compressed_only, em->flags);
697 goto out;
698 }
699 if (em->orig_start != orig_start) {
700 test_err("wrong orig offset, want %llu, have %llu",
701 em->start, orig_start);
702 goto out;
703 }
704 if (extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
705 test_err("unexpected compress type, wanted %d, got %d",
706 BTRFS_COMPRESS_ZLIB, extent_map_compression(em));
707 goto out;
708 }
709 offset = em->start + em->len;
710 free_extent_map(em);
711
712 /* A hole between regular extents but no hole extent */
713 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6, sectorsize);
714 if (IS_ERR(em)) {
715 test_err("got an error when we shouldn't have");
716 goto out;
717 }
718 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
719 test_err("expected a real extent, got %llu", em->block_start);
720 goto out;
721 }
722 if (em->start != offset || em->len != sectorsize) {
723 test_err(
724 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
725 offset, sectorsize, em->start, em->len);
726 goto out;
727 }
728 if (em->flags != 0) {
729 test_err("unexpected flags set, want 0 have %u", em->flags);
730 goto out;
731 }
732 if (em->orig_start != em->start) {
733 test_err("wrong orig offset, want %llu, have %llu", em->start,
734 em->orig_start);
735 goto out;
736 }
737 offset = em->start + em->len;
738 free_extent_map(em);
739
740 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M);
741 if (IS_ERR(em)) {
742 test_err("got an error when we shouldn't have");
743 goto out;
744 }
745 if (em->block_start != EXTENT_MAP_HOLE) {
746 test_err("expected a hole extent, got %llu", em->block_start);
747 goto out;
748 }
749 /*
750 * Currently we just return a length that we requested rather than the
751 * length of the actual hole, if this changes we'll have to change this
752 * test.
753 */
754 if (em->start != offset || em->len != 3 * sectorsize) {
755 test_err(
756 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
757 offset, 3 * sectorsize, em->start, em->len);
758 goto out;
759 }
760 if (em->flags != vacancy_only) {
761 test_err("unexpected flags set, want %u have %u",
762 vacancy_only, em->flags);
763 goto out;
764 }
765 if (em->orig_start != em->start) {
766 test_err("wrong orig offset, want %llu, have %llu", em->start,
767 em->orig_start);
768 goto out;
769 }
770 offset = em->start + em->len;
771 free_extent_map(em);
772
773 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize);
774 if (IS_ERR(em)) {
775 test_err("got an error when we shouldn't have");
776 goto out;
777 }
778 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
779 test_err("expected a real extent, got %llu", em->block_start);
780 goto out;
781 }
782 if (em->start != offset || em->len != sectorsize) {
783 test_err(
784 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
785 offset, sectorsize, em->start, em->len);
786 goto out;
787 }
788 if (em->flags != 0) {
789 test_err("unexpected flags set, want 0 have %u", em->flags);
790 goto out;
791 }
792 if (em->orig_start != em->start) {
793 test_err("wrong orig offset, want %llu, have %llu", em->start,
794 em->orig_start);
795 goto out;
796 }
797 ret = 0;
798out:
799 if (!IS_ERR(em))
800 free_extent_map(em);
801 iput(inode);
802 btrfs_free_dummy_root(root);
803 btrfs_free_dummy_fs_info(fs_info);
804 return ret;
805}
806
807static int test_hole_first(u32 sectorsize, u32 nodesize)
808{
809 struct btrfs_fs_info *fs_info = NULL;
810 struct inode *inode = NULL;
811 struct btrfs_root *root = NULL;
812 struct extent_map *em = NULL;
813 int ret = -ENOMEM;
814
815 test_msg("running hole first btrfs_get_extent test");
816
817 inode = btrfs_new_test_inode();
818 if (!inode) {
819 test_std_err(TEST_ALLOC_INODE);
820 return ret;
821 }
822
823 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
824 if (!fs_info) {
825 test_std_err(TEST_ALLOC_FS_INFO);
826 goto out;
827 }
828
829 root = btrfs_alloc_dummy_root(fs_info);
830 if (IS_ERR(root)) {
831 test_std_err(TEST_ALLOC_ROOT);
832 goto out;
833 }
834
835 root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
836 if (!root->node) {
837 test_std_err(TEST_ALLOC_ROOT);
838 goto out;
839 }
840
841 btrfs_set_header_nritems(root->node, 0);
842 btrfs_set_header_level(root->node, 0);
843 BTRFS_I(inode)->root = root;
844 ret = -EINVAL;
845
846 /*
847 * Need a blank inode item here just so we don't confuse
848 * btrfs_get_extent.
849 */
850 insert_inode_item_key(root);
851 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
852 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
853 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize);
854 if (IS_ERR(em)) {
855 test_err("got an error when we shouldn't have");
856 goto out;
857 }
858 if (em->block_start != EXTENT_MAP_HOLE) {
859 test_err("expected a hole, got %llu", em->block_start);
860 goto out;
861 }
862 if (em->start != 0 || em->len != sectorsize) {
863 test_err(
864 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
865 sectorsize, em->start, em->len);
866 goto out;
867 }
868 if (em->flags != vacancy_only) {
869 test_err("wrong flags, wanted %u, have %u", vacancy_only,
870 em->flags);
871 goto out;
872 }
873 free_extent_map(em);
874
875 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize, 2 * sectorsize);
876 if (IS_ERR(em)) {
877 test_err("got an error when we shouldn't have");
878 goto out;
879 }
880 if (em->block_start != sectorsize) {
881 test_err("expected a real extent, got %llu", em->block_start);
882 goto out;
883 }
884 if (em->start != sectorsize || em->len != sectorsize) {
885 test_err(
886 "unexpected extent wanted start %u len %u, got start %llu len %llu",
887 sectorsize, sectorsize, em->start, em->len);
888 goto out;
889 }
890 if (em->flags != 0) {
891 test_err("unexpected flags set, wanted 0 got %u",
892 em->flags);
893 goto out;
894 }
895 ret = 0;
896out:
897 if (!IS_ERR(em))
898 free_extent_map(em);
899 iput(inode);
900 btrfs_free_dummy_root(root);
901 btrfs_free_dummy_fs_info(fs_info);
902 return ret;
903}
904
905static int test_extent_accounting(u32 sectorsize, u32 nodesize)
906{
907 struct btrfs_fs_info *fs_info = NULL;
908 struct inode *inode = NULL;
909 struct btrfs_root *root = NULL;
910 int ret = -ENOMEM;
911
912 test_msg("running outstanding_extents tests");
913
914 inode = btrfs_new_test_inode();
915 if (!inode) {
916 test_std_err(TEST_ALLOC_INODE);
917 return ret;
918 }
919
920 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
921 if (!fs_info) {
922 test_std_err(TEST_ALLOC_FS_INFO);
923 goto out;
924 }
925
926 root = btrfs_alloc_dummy_root(fs_info);
927 if (IS_ERR(root)) {
928 test_std_err(TEST_ALLOC_ROOT);
929 goto out;
930 }
931
932 BTRFS_I(inode)->root = root;
933
934 /* [BTRFS_MAX_EXTENT_SIZE] */
935 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), 0,
936 BTRFS_MAX_EXTENT_SIZE - 1, 0, NULL);
937 if (ret) {
938 test_err("btrfs_set_extent_delalloc returned %d", ret);
939 goto out;
940 }
941 if (BTRFS_I(inode)->outstanding_extents != 1) {
942 ret = -EINVAL;
943 test_err("miscount, wanted 1, got %u",
944 BTRFS_I(inode)->outstanding_extents);
945 goto out;
946 }
947
948 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
949 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE,
950 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
951 0, NULL);
952 if (ret) {
953 test_err("btrfs_set_extent_delalloc returned %d", ret);
954 goto out;
955 }
956 if (BTRFS_I(inode)->outstanding_extents != 2) {
957 ret = -EINVAL;
958 test_err("miscount, wanted 2, got %u",
959 BTRFS_I(inode)->outstanding_extents);
960 goto out;
961 }
962
963 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
964 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
965 BTRFS_MAX_EXTENT_SIZE >> 1,
966 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
967 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
968 EXTENT_UPTODATE, NULL);
969 if (ret) {
970 test_err("clear_extent_bit returned %d", ret);
971 goto out;
972 }
973 if (BTRFS_I(inode)->outstanding_extents != 2) {
974 ret = -EINVAL;
975 test_err("miscount, wanted 2, got %u",
976 BTRFS_I(inode)->outstanding_extents);
977 goto out;
978 }
979
980 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
981 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE >> 1,
982 (BTRFS_MAX_EXTENT_SIZE >> 1)
983 + sectorsize - 1,
984 0, NULL);
985 if (ret) {
986 test_err("btrfs_set_extent_delalloc returned %d", ret);
987 goto out;
988 }
989 if (BTRFS_I(inode)->outstanding_extents != 2) {
990 ret = -EINVAL;
991 test_err("miscount, wanted 2, got %u",
992 BTRFS_I(inode)->outstanding_extents);
993 goto out;
994 }
995
996 /*
997 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
998 */
999 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1000 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
1001 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
1002 0, NULL);
1003 if (ret) {
1004 test_err("btrfs_set_extent_delalloc returned %d", ret);
1005 goto out;
1006 }
1007 if (BTRFS_I(inode)->outstanding_extents != 4) {
1008 ret = -EINVAL;
1009 test_err("miscount, wanted 4, got %u",
1010 BTRFS_I(inode)->outstanding_extents);
1011 goto out;
1012 }
1013
1014 /*
1015 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1016 */
1017 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1018 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1019 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1020 if (ret) {
1021 test_err("btrfs_set_extent_delalloc returned %d", ret);
1022 goto out;
1023 }
1024 if (BTRFS_I(inode)->outstanding_extents != 3) {
1025 ret = -EINVAL;
1026 test_err("miscount, wanted 3, got %u",
1027 BTRFS_I(inode)->outstanding_extents);
1028 goto out;
1029 }
1030
1031 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1032 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1033 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1034 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1035 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1036 EXTENT_UPTODATE, NULL);
1037 if (ret) {
1038 test_err("clear_extent_bit returned %d", ret);
1039 goto out;
1040 }
1041 if (BTRFS_I(inode)->outstanding_extents != 4) {
1042 ret = -EINVAL;
1043 test_err("miscount, wanted 4, got %u",
1044 BTRFS_I(inode)->outstanding_extents);
1045 goto out;
1046 }
1047
1048 /*
1049 * Refill the hole again just for good measure, because I thought it
1050 * might fail and I'd rather satisfy my paranoia at this point.
1051 */
1052 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1053 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1054 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1055 if (ret) {
1056 test_err("btrfs_set_extent_delalloc returned %d", ret);
1057 goto out;
1058 }
1059 if (BTRFS_I(inode)->outstanding_extents != 3) {
1060 ret = -EINVAL;
1061 test_err("miscount, wanted 3, got %u",
1062 BTRFS_I(inode)->outstanding_extents);
1063 goto out;
1064 }
1065
1066 /* Empty */
1067 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1068 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1069 EXTENT_UPTODATE, NULL);
1070 if (ret) {
1071 test_err("clear_extent_bit returned %d", ret);
1072 goto out;
1073 }
1074 if (BTRFS_I(inode)->outstanding_extents) {
1075 ret = -EINVAL;
1076 test_err("miscount, wanted 0, got %u",
1077 BTRFS_I(inode)->outstanding_extents);
1078 goto out;
1079 }
1080 ret = 0;
1081out:
1082 if (ret)
1083 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1084 EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1085 EXTENT_UPTODATE, NULL);
1086 iput(inode);
1087 btrfs_free_dummy_root(root);
1088 btrfs_free_dummy_fs_info(fs_info);
1089 return ret;
1090}
1091
1092int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1093{
1094 int ret;
1095
1096 test_msg("running inode tests");
1097
1098 compressed_only |= EXTENT_FLAG_COMPRESS_ZLIB;
1099 prealloc_only |= EXTENT_FLAG_PREALLOC;
1100
1101 ret = test_btrfs_get_extent(sectorsize, nodesize);
1102 if (ret)
1103 return ret;
1104 ret = test_hole_first(sectorsize, nodesize);
1105 if (ret)
1106 return ret;
1107 return test_extent_accounting(sectorsize, nodesize);
1108}
1/*
2 * Copyright (C) 2013 Fusion IO. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
19#include "btrfs-tests.h"
20#include "../ctree.h"
21#include "../btrfs_inode.h"
22#include "../disk-io.h"
23#include "../extent_io.h"
24#include "../volumes.h"
25
26static struct btrfs_fs_info *alloc_dummy_fs_info(void)
27{
28 struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info),
29 GFP_NOFS);
30 if (!fs_info)
31 return fs_info;
32 fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices),
33 GFP_NOFS);
34 if (!fs_info->fs_devices) {
35 kfree(fs_info);
36 return NULL;
37 }
38 return fs_info;
39}
40static void free_dummy_root(struct btrfs_root *root)
41{
42 if (!root)
43 return;
44 if (root->fs_info) {
45 kfree(root->fs_info->fs_devices);
46 kfree(root->fs_info);
47 }
48 if (root->node)
49 free_extent_buffer(root->node);
50 kfree(root);
51}
52
53static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
54 u64 ram_bytes, u64 offset, u64 disk_bytenr,
55 u64 disk_len, u32 type, u8 compression, int slot)
56{
57 struct btrfs_path path;
58 struct btrfs_file_extent_item *fi;
59 struct extent_buffer *leaf = root->node;
60 struct btrfs_key key;
61 u32 value_len = sizeof(struct btrfs_file_extent_item);
62
63 if (type == BTRFS_FILE_EXTENT_INLINE)
64 value_len += len;
65 memset(&path, 0, sizeof(path));
66
67 path.nodes[0] = leaf;
68 path.slots[0] = slot;
69
70 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
71 key.type = BTRFS_EXTENT_DATA_KEY;
72 key.offset = start;
73
74 setup_items_for_insert(root, &path, &key, &value_len, value_len,
75 value_len + sizeof(struct btrfs_item), 1);
76 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
77 btrfs_set_file_extent_generation(leaf, fi, 1);
78 btrfs_set_file_extent_type(leaf, fi, type);
79 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
80 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
81 btrfs_set_file_extent_offset(leaf, fi, offset);
82 btrfs_set_file_extent_num_bytes(leaf, fi, len);
83 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
84 btrfs_set_file_extent_compression(leaf, fi, compression);
85 btrfs_set_file_extent_encryption(leaf, fi, 0);
86 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
87}
88
89static void insert_inode_item_key(struct btrfs_root *root)
90{
91 struct btrfs_path path;
92 struct extent_buffer *leaf = root->node;
93 struct btrfs_key key;
94 u32 value_len = 0;
95
96 memset(&path, 0, sizeof(path));
97
98 path.nodes[0] = leaf;
99 path.slots[0] = 0;
100
101 key.objectid = BTRFS_INODE_ITEM_KEY;
102 key.type = BTRFS_INODE_ITEM_KEY;
103 key.offset = 0;
104
105 setup_items_for_insert(root, &path, &key, &value_len, value_len,
106 value_len + sizeof(struct btrfs_item), 1);
107}
108
109/*
110 * Build the most complicated map of extents the earth has ever seen. We want
111 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
112 * diagram of how the extents will look though this may not be possible we still
113 * want to make sure everything acts normally (the last number is not inclusive)
114 *
115 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
116 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
117 *
118 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
119 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
120 *
121 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
122 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
123 *
124 * [81920-86016]
125 * [ regular ]
126 */
127static void setup_file_extents(struct btrfs_root *root)
128{
129 int slot = 0;
130 u64 disk_bytenr = 1 * 1024 * 1024;
131 u64 offset = 0;
132
133 /* First we want a hole */
134 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
135 slot);
136 slot++;
137 offset += 5;
138
139 /*
140 * Now we want an inline extent, I don't think this is possible but hey
141 * why not? Also keep in mind if we have an inline extent it counts as
142 * the whole first page. If we were to expand it we would have to cow
143 * and we wouldn't have an inline extent anymore.
144 */
145 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
146 slot);
147 slot++;
148 offset = 4096;
149
150 /* Now another hole */
151 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
152 slot);
153 slot++;
154 offset += 4;
155
156 /* Now for a regular extent */
157 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
158 BTRFS_FILE_EXTENT_REG, 0, slot);
159 slot++;
160 disk_bytenr += 4096;
161 offset += 4095;
162
163 /*
164 * Now for 3 extents that were split from a hole punch so we test
165 * offsets properly.
166 */
167 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
168 BTRFS_FILE_EXTENT_REG, 0, slot);
169 slot++;
170 offset += 4096;
171 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
172 0, slot);
173 slot++;
174 offset += 4096;
175 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
176 BTRFS_FILE_EXTENT_REG, 0, slot);
177 slot++;
178 offset += 8192;
179 disk_bytenr += 16384;
180
181 /* Now for a unwritten prealloc extent */
182 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
183 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
184 slot++;
185 offset += 4096;
186
187 /*
188 * We want to jack up disk_bytenr a little more so the em stuff doesn't
189 * merge our records.
190 */
191 disk_bytenr += 8192;
192
193 /*
194 * Now for a partially written prealloc extent, basically the same as
195 * the hole punch example above. Ram_bytes never changes when you mark
196 * extents written btw.
197 */
198 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
199 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
200 slot++;
201 offset += 4096;
202 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
203 BTRFS_FILE_EXTENT_REG, 0, slot);
204 slot++;
205 offset += 4096;
206 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
207 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
208 slot++;
209 offset += 8192;
210 disk_bytenr += 16384;
211
212 /* Now a normal compressed extent */
213 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
214 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
215 slot++;
216 offset += 8192;
217 /* No merges */
218 disk_bytenr += 8192;
219
220 /* Now a split compressed extent */
221 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
222 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
223 slot++;
224 offset += 4096;
225 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
226 BTRFS_FILE_EXTENT_REG, 0, slot);
227 slot++;
228 offset += 4096;
229 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
230 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
231 slot++;
232 offset += 8192;
233 disk_bytenr += 8192;
234
235 /* Now extents that have a hole but no hole extent */
236 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
237 BTRFS_FILE_EXTENT_REG, 0, slot);
238 slot++;
239 offset += 16384;
240 disk_bytenr += 4096;
241 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
242 BTRFS_FILE_EXTENT_REG, 0, slot);
243}
244
245static unsigned long prealloc_only = 0;
246static unsigned long compressed_only = 0;
247static unsigned long vacancy_only = 0;
248
249static noinline int test_btrfs_get_extent(void)
250{
251 struct inode *inode = NULL;
252 struct btrfs_root *root = NULL;
253 struct extent_map *em = NULL;
254 u64 orig_start;
255 u64 disk_bytenr;
256 u64 offset;
257 int ret = -ENOMEM;
258
259 inode = btrfs_new_test_inode();
260 if (!inode) {
261 test_msg("Couldn't allocate inode\n");
262 return ret;
263 }
264
265 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
266 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
267 BTRFS_I(inode)->location.offset = 0;
268
269 root = btrfs_alloc_dummy_root();
270 if (IS_ERR(root)) {
271 test_msg("Couldn't allocate root\n");
272 goto out;
273 }
274
275 /*
276 * We do this since btrfs_get_extent wants to assign em->bdev to
277 * root->fs_info->fs_devices->latest_bdev.
278 */
279 root->fs_info = alloc_dummy_fs_info();
280 if (!root->fs_info) {
281 test_msg("Couldn't allocate dummy fs info\n");
282 goto out;
283 }
284
285 root->node = alloc_dummy_extent_buffer(0, 4096);
286 if (!root->node) {
287 test_msg("Couldn't allocate dummy buffer\n");
288 goto out;
289 }
290
291 /*
292 * We will just free a dummy node if it's ref count is 2 so we need an
293 * extra ref so our searches don't accidently release our page.
294 */
295 extent_buffer_get(root->node);
296 btrfs_set_header_nritems(root->node, 0);
297 btrfs_set_header_level(root->node, 0);
298 ret = -EINVAL;
299
300 /* First with no extents */
301 BTRFS_I(inode)->root = root;
302 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
303 if (IS_ERR(em)) {
304 em = NULL;
305 test_msg("Got an error when we shouldn't have\n");
306 goto out;
307 }
308 if (em->block_start != EXTENT_MAP_HOLE) {
309 test_msg("Expected a hole, got %llu\n", em->block_start);
310 goto out;
311 }
312 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
313 test_msg("Vacancy flag wasn't set properly\n");
314 goto out;
315 }
316 free_extent_map(em);
317 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
318
319 /*
320 * All of the magic numbers are based on the mapping setup in
321 * setup_file_extents, so if you change anything there you need to
322 * update the comment and update the expected values below.
323 */
324 setup_file_extents(root);
325
326 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
327 if (IS_ERR(em)) {
328 test_msg("Got an error when we shouldn't have\n");
329 goto out;
330 }
331 if (em->block_start != EXTENT_MAP_HOLE) {
332 test_msg("Expected a hole, got %llu\n", em->block_start);
333 goto out;
334 }
335 if (em->start != 0 || em->len != 5) {
336 test_msg("Unexpected extent wanted start 0 len 5, got start "
337 "%llu len %llu\n", em->start, em->len);
338 goto out;
339 }
340 if (em->flags != 0) {
341 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
342 goto out;
343 }
344 offset = em->start + em->len;
345 free_extent_map(em);
346
347 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
348 if (IS_ERR(em)) {
349 test_msg("Got an error when we shouldn't have\n");
350 goto out;
351 }
352 if (em->block_start != EXTENT_MAP_INLINE) {
353 test_msg("Expected an inline, got %llu\n", em->block_start);
354 goto out;
355 }
356 if (em->start != offset || em->len != 4091) {
357 test_msg("Unexpected extent wanted start %llu len 1, got start "
358 "%llu len %llu\n", offset, em->start, em->len);
359 goto out;
360 }
361 if (em->flags != 0) {
362 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
363 goto out;
364 }
365 /*
366 * We don't test anything else for inline since it doesn't get set
367 * unless we have a page for it to write into. Maybe we should change
368 * this?
369 */
370 offset = em->start + em->len;
371 free_extent_map(em);
372
373 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
374 if (IS_ERR(em)) {
375 test_msg("Got an error when we shouldn't have\n");
376 goto out;
377 }
378 if (em->block_start != EXTENT_MAP_HOLE) {
379 test_msg("Expected a hole, got %llu\n", em->block_start);
380 goto out;
381 }
382 if (em->start != offset || em->len != 4) {
383 test_msg("Unexpected extent wanted start %llu len 4, got start "
384 "%llu len %llu\n", offset, em->start, em->len);
385 goto out;
386 }
387 if (em->flags != 0) {
388 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
389 goto out;
390 }
391 offset = em->start + em->len;
392 free_extent_map(em);
393
394 /* Regular extent */
395 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
396 if (IS_ERR(em)) {
397 test_msg("Got an error when we shouldn't have\n");
398 goto out;
399 }
400 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
401 test_msg("Expected a real extent, got %llu\n", em->block_start);
402 goto out;
403 }
404 if (em->start != offset || em->len != 4095) {
405 test_msg("Unexpected extent wanted start %llu len 4095, got "
406 "start %llu len %llu\n", offset, em->start, em->len);
407 goto out;
408 }
409 if (em->flags != 0) {
410 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
411 goto out;
412 }
413 if (em->orig_start != em->start) {
414 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
415 em->orig_start);
416 goto out;
417 }
418 offset = em->start + em->len;
419 free_extent_map(em);
420
421 /* The next 3 are split extents */
422 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
423 if (IS_ERR(em)) {
424 test_msg("Got an error when we shouldn't have\n");
425 goto out;
426 }
427 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
428 test_msg("Expected a real extent, got %llu\n", em->block_start);
429 goto out;
430 }
431 if (em->start != offset || em->len != 4096) {
432 test_msg("Unexpected extent wanted start %llu len 4096, got "
433 "start %llu len %llu\n", offset, em->start, em->len);
434 goto out;
435 }
436 if (em->flags != 0) {
437 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
438 goto out;
439 }
440 if (em->orig_start != em->start) {
441 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
442 em->orig_start);
443 goto out;
444 }
445 disk_bytenr = em->block_start;
446 orig_start = em->start;
447 offset = em->start + em->len;
448 free_extent_map(em);
449
450 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
451 if (IS_ERR(em)) {
452 test_msg("Got an error when we shouldn't have\n");
453 goto out;
454 }
455 if (em->block_start != EXTENT_MAP_HOLE) {
456 test_msg("Expected a hole, got %llu\n", em->block_start);
457 goto out;
458 }
459 if (em->start != offset || em->len != 4096) {
460 test_msg("Unexpected extent wanted start %llu len 4096, got "
461 "start %llu len %llu\n", offset, em->start, em->len);
462 goto out;
463 }
464 if (em->flags != 0) {
465 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
466 goto out;
467 }
468 offset = em->start + em->len;
469 free_extent_map(em);
470
471 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
472 if (IS_ERR(em)) {
473 test_msg("Got an error when we shouldn't have\n");
474 goto out;
475 }
476 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
477 test_msg("Expected a real extent, got %llu\n", em->block_start);
478 goto out;
479 }
480 if (em->start != offset || em->len != 8192) {
481 test_msg("Unexpected extent wanted start %llu len 8192, got "
482 "start %llu len %llu\n", offset, em->start, em->len);
483 goto out;
484 }
485 if (em->flags != 0) {
486 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
487 goto out;
488 }
489 if (em->orig_start != orig_start) {
490 test_msg("Wrong orig offset, want %llu, have %llu\n",
491 orig_start, em->orig_start);
492 goto out;
493 }
494 disk_bytenr += (em->start - orig_start);
495 if (em->block_start != disk_bytenr) {
496 test_msg("Wrong block start, want %llu, have %llu\n",
497 disk_bytenr, em->block_start);
498 goto out;
499 }
500 offset = em->start + em->len;
501 free_extent_map(em);
502
503 /* Prealloc extent */
504 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
505 if (IS_ERR(em)) {
506 test_msg("Got an error when we shouldn't have\n");
507 goto out;
508 }
509 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
510 test_msg("Expected a real extent, got %llu\n", em->block_start);
511 goto out;
512 }
513 if (em->start != offset || em->len != 4096) {
514 test_msg("Unexpected extent wanted start %llu len 4096, got "
515 "start %llu len %llu\n", offset, em->start, em->len);
516 goto out;
517 }
518 if (em->flags != prealloc_only) {
519 test_msg("Unexpected flags set, want %lu have %lu\n",
520 prealloc_only, em->flags);
521 goto out;
522 }
523 if (em->orig_start != em->start) {
524 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
525 em->orig_start);
526 goto out;
527 }
528 offset = em->start + em->len;
529 free_extent_map(em);
530
531 /* The next 3 are a half written prealloc extent */
532 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
533 if (IS_ERR(em)) {
534 test_msg("Got an error when we shouldn't have\n");
535 goto out;
536 }
537 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
538 test_msg("Expected a real extent, got %llu\n", em->block_start);
539 goto out;
540 }
541 if (em->start != offset || em->len != 4096) {
542 test_msg("Unexpected extent wanted start %llu len 4096, got "
543 "start %llu len %llu\n", offset, em->start, em->len);
544 goto out;
545 }
546 if (em->flags != prealloc_only) {
547 test_msg("Unexpected flags set, want %lu have %lu\n",
548 prealloc_only, em->flags);
549 goto out;
550 }
551 if (em->orig_start != em->start) {
552 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
553 em->orig_start);
554 goto out;
555 }
556 disk_bytenr = em->block_start;
557 orig_start = em->start;
558 offset = em->start + em->len;
559 free_extent_map(em);
560
561 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
562 if (IS_ERR(em)) {
563 test_msg("Got an error when we shouldn't have\n");
564 goto out;
565 }
566 if (em->block_start >= EXTENT_MAP_HOLE) {
567 test_msg("Expected a real extent, got %llu\n", em->block_start);
568 goto out;
569 }
570 if (em->start != offset || em->len != 4096) {
571 test_msg("Unexpected extent wanted start %llu len 4096, got "
572 "start %llu len %llu\n", offset, em->start, em->len);
573 goto out;
574 }
575 if (em->flags != 0) {
576 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
577 goto out;
578 }
579 if (em->orig_start != orig_start) {
580 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
581 orig_start, em->orig_start);
582 goto out;
583 }
584 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
585 test_msg("Unexpected block start, wanted %llu, have %llu\n",
586 disk_bytenr + (em->start - em->orig_start),
587 em->block_start);
588 goto out;
589 }
590 offset = em->start + em->len;
591 free_extent_map(em);
592
593 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
594 if (IS_ERR(em)) {
595 test_msg("Got an error when we shouldn't have\n");
596 goto out;
597 }
598 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
599 test_msg("Expected a real extent, got %llu\n", em->block_start);
600 goto out;
601 }
602 if (em->start != offset || em->len != 8192) {
603 test_msg("Unexpected extent wanted start %llu len 8192, got "
604 "start %llu len %llu\n", offset, em->start, em->len);
605 goto out;
606 }
607 if (em->flags != prealloc_only) {
608 test_msg("Unexpected flags set, want %lu have %lu\n",
609 prealloc_only, em->flags);
610 goto out;
611 }
612 if (em->orig_start != orig_start) {
613 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
614 em->orig_start);
615 goto out;
616 }
617 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
618 test_msg("Unexpected block start, wanted %llu, have %llu\n",
619 disk_bytenr + (em->start - em->orig_start),
620 em->block_start);
621 goto out;
622 }
623 offset = em->start + em->len;
624 free_extent_map(em);
625
626 /* Now for the compressed extent */
627 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
628 if (IS_ERR(em)) {
629 test_msg("Got an error when we shouldn't have\n");
630 goto out;
631 }
632 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
633 test_msg("Expected a real extent, got %llu\n", em->block_start);
634 goto out;
635 }
636 if (em->start != offset || em->len != 8192) {
637 test_msg("Unexpected extent wanted start %llu len 8192, got "
638 "start %llu len %llu\n", offset, em->start, em->len);
639 goto out;
640 }
641 if (em->flags != compressed_only) {
642 test_msg("Unexpected flags set, want %lu have %lu\n",
643 compressed_only, em->flags);
644 goto out;
645 }
646 if (em->orig_start != em->start) {
647 test_msg("Wrong orig offset, want %llu, have %llu\n",
648 em->start, em->orig_start);
649 goto out;
650 }
651 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
652 test_msg("Unexpected compress type, wanted %d, got %d\n",
653 BTRFS_COMPRESS_ZLIB, em->compress_type);
654 goto out;
655 }
656 offset = em->start + em->len;
657 free_extent_map(em);
658
659 /* Split compressed extent */
660 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
661 if (IS_ERR(em)) {
662 test_msg("Got an error when we shouldn't have\n");
663 goto out;
664 }
665 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
666 test_msg("Expected a real extent, got %llu\n", em->block_start);
667 goto out;
668 }
669 if (em->start != offset || em->len != 4096) {
670 test_msg("Unexpected extent wanted start %llu len 4096, got "
671 "start %llu len %llu\n", offset, em->start, em->len);
672 goto out;
673 }
674 if (em->flags != compressed_only) {
675 test_msg("Unexpected flags set, want %lu have %lu\n",
676 compressed_only, em->flags);
677 goto out;
678 }
679 if (em->orig_start != em->start) {
680 test_msg("Wrong orig offset, want %llu, have %llu\n",
681 em->start, em->orig_start);
682 goto out;
683 }
684 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
685 test_msg("Unexpected compress type, wanted %d, got %d\n",
686 BTRFS_COMPRESS_ZLIB, em->compress_type);
687 goto out;
688 }
689 disk_bytenr = em->block_start;
690 orig_start = em->start;
691 offset = em->start + em->len;
692 free_extent_map(em);
693
694 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
695 if (IS_ERR(em)) {
696 test_msg("Got an error when we shouldn't have\n");
697 goto out;
698 }
699 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
700 test_msg("Expected a real extent, got %llu\n", em->block_start);
701 goto out;
702 }
703 if (em->start != offset || em->len != 4096) {
704 test_msg("Unexpected extent wanted start %llu len 4096, got "
705 "start %llu len %llu\n", offset, em->start, em->len);
706 goto out;
707 }
708 if (em->flags != 0) {
709 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
710 goto out;
711 }
712 if (em->orig_start != em->start) {
713 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
714 em->orig_start);
715 goto out;
716 }
717 offset = em->start + em->len;
718 free_extent_map(em);
719
720 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
721 if (IS_ERR(em)) {
722 test_msg("Got an error when we shouldn't have\n");
723 goto out;
724 }
725 if (em->block_start != disk_bytenr) {
726 test_msg("Block start does not match, want %llu got %llu\n",
727 disk_bytenr, em->block_start);
728 goto out;
729 }
730 if (em->start != offset || em->len != 8192) {
731 test_msg("Unexpected extent wanted start %llu len 8192, got "
732 "start %llu len %llu\n", offset, em->start, em->len);
733 goto out;
734 }
735 if (em->flags != compressed_only) {
736 test_msg("Unexpected flags set, want %lu have %lu\n",
737 compressed_only, em->flags);
738 goto out;
739 }
740 if (em->orig_start != orig_start) {
741 test_msg("Wrong orig offset, want %llu, have %llu\n",
742 em->start, orig_start);
743 goto out;
744 }
745 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
746 test_msg("Unexpected compress type, wanted %d, got %d\n",
747 BTRFS_COMPRESS_ZLIB, em->compress_type);
748 goto out;
749 }
750 offset = em->start + em->len;
751 free_extent_map(em);
752
753 /* A hole between regular extents but no hole extent */
754 em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
755 if (IS_ERR(em)) {
756 test_msg("Got an error when we shouldn't have\n");
757 goto out;
758 }
759 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
760 test_msg("Expected a real extent, got %llu\n", em->block_start);
761 goto out;
762 }
763 if (em->start != offset || em->len != 4096) {
764 test_msg("Unexpected extent wanted start %llu len 4096, got "
765 "start %llu len %llu\n", offset, em->start, em->len);
766 goto out;
767 }
768 if (em->flags != 0) {
769 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
770 goto out;
771 }
772 if (em->orig_start != em->start) {
773 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
774 em->orig_start);
775 goto out;
776 }
777 offset = em->start + em->len;
778 free_extent_map(em);
779
780 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
781 if (IS_ERR(em)) {
782 test_msg("Got an error when we shouldn't have\n");
783 goto out;
784 }
785 if (em->block_start != EXTENT_MAP_HOLE) {
786 test_msg("Expected a hole extent, got %llu\n", em->block_start);
787 goto out;
788 }
789 /*
790 * Currently we just return a length that we requested rather than the
791 * length of the actual hole, if this changes we'll have to change this
792 * test.
793 */
794 if (em->start != offset || em->len != 12288) {
795 test_msg("Unexpected extent wanted start %llu len 12288, got "
796 "start %llu len %llu\n", offset, em->start, em->len);
797 goto out;
798 }
799 if (em->flags != vacancy_only) {
800 test_msg("Unexpected flags set, want %lu have %lu\n",
801 vacancy_only, em->flags);
802 goto out;
803 }
804 if (em->orig_start != em->start) {
805 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
806 em->orig_start);
807 goto out;
808 }
809 offset = em->start + em->len;
810 free_extent_map(em);
811
812 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
813 if (IS_ERR(em)) {
814 test_msg("Got an error when we shouldn't have\n");
815 goto out;
816 }
817 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
818 test_msg("Expected a real extent, got %llu\n", em->block_start);
819 goto out;
820 }
821 if (em->start != offset || em->len != 4096) {
822 test_msg("Unexpected extent wanted start %llu len 4096, got "
823 "start %llu len %llu\n", offset, em->start, em->len);
824 goto out;
825 }
826 if (em->flags != 0) {
827 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
828 goto out;
829 }
830 if (em->orig_start != em->start) {
831 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
832 em->orig_start);
833 goto out;
834 }
835 ret = 0;
836out:
837 if (!IS_ERR(em))
838 free_extent_map(em);
839 iput(inode);
840 free_dummy_root(root);
841 return ret;
842}
843
844static int test_hole_first(void)
845{
846 struct inode *inode = NULL;
847 struct btrfs_root *root = NULL;
848 struct extent_map *em = NULL;
849 int ret = -ENOMEM;
850
851 inode = btrfs_new_test_inode();
852 if (!inode) {
853 test_msg("Couldn't allocate inode\n");
854 return ret;
855 }
856
857 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
858 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
859 BTRFS_I(inode)->location.offset = 0;
860
861 root = btrfs_alloc_dummy_root();
862 if (IS_ERR(root)) {
863 test_msg("Couldn't allocate root\n");
864 goto out;
865 }
866
867 root->fs_info = alloc_dummy_fs_info();
868 if (!root->fs_info) {
869 test_msg("Couldn't allocate dummy fs info\n");
870 goto out;
871 }
872
873 root->node = alloc_dummy_extent_buffer(0, 4096);
874 if (!root->node) {
875 test_msg("Couldn't allocate dummy buffer\n");
876 goto out;
877 }
878
879 extent_buffer_get(root->node);
880 btrfs_set_header_nritems(root->node, 0);
881 btrfs_set_header_level(root->node, 0);
882 BTRFS_I(inode)->root = root;
883 ret = -EINVAL;
884
885 /*
886 * Need a blank inode item here just so we don't confuse
887 * btrfs_get_extent.
888 */
889 insert_inode_item_key(root);
890 insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
891 BTRFS_FILE_EXTENT_REG, 0, 1);
892 em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
893 if (IS_ERR(em)) {
894 test_msg("Got an error when we shouldn't have\n");
895 goto out;
896 }
897 if (em->block_start != EXTENT_MAP_HOLE) {
898 test_msg("Expected a hole, got %llu\n", em->block_start);
899 goto out;
900 }
901 if (em->start != 0 || em->len != 4096) {
902 test_msg("Unexpected extent wanted start 0 len 4096, got start "
903 "%llu len %llu\n", em->start, em->len);
904 goto out;
905 }
906 if (em->flags != vacancy_only) {
907 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
908 em->flags);
909 goto out;
910 }
911 free_extent_map(em);
912
913 em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
914 if (IS_ERR(em)) {
915 test_msg("Got an error when we shouldn't have\n");
916 goto out;
917 }
918 if (em->block_start != 4096) {
919 test_msg("Expected a real extent, got %llu\n", em->block_start);
920 goto out;
921 }
922 if (em->start != 4096 || em->len != 4096) {
923 test_msg("Unexpected extent wanted start 4096 len 4096, got "
924 "start %llu len %llu\n", em->start, em->len);
925 goto out;
926 }
927 if (em->flags != 0) {
928 test_msg("Unexpected flags set, wanted 0 got %lu\n",
929 em->flags);
930 goto out;
931 }
932 ret = 0;
933out:
934 if (!IS_ERR(em))
935 free_extent_map(em);
936 iput(inode);
937 free_dummy_root(root);
938 return ret;
939}
940
941int btrfs_test_inodes(void)
942{
943 int ret;
944
945 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
946 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
947 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
948
949 test_msg("Running btrfs_get_extent tests\n");
950 ret = test_btrfs_get_extent();
951 if (ret)
952 return ret;
953 test_msg("Running hole first btrfs_get_extent test\n");
954 return test_hole_first();
955}