2 * Copyright (C) 2013 Fusion IO. All rights reserved.
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.
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.
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.
19 #include "btrfs-tests.h"
21 #include "../btrfs_inode.h"
22 #include "../disk-io.h"
23 #include "../extent_io.h"
24 #include "../volumes.h"
26 static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
27 u64 ram_bytes, u64 offset, u64 disk_bytenr,
28 u64 disk_len, u32 type, u8 compression, int slot)
30 struct btrfs_path path;
31 struct btrfs_file_extent_item *fi;
32 struct extent_buffer *leaf = root->node;
34 u32 value_len = sizeof(struct btrfs_file_extent_item);
36 if (type == BTRFS_FILE_EXTENT_INLINE)
38 memset(&path, 0, sizeof(path));
43 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
44 key.type = BTRFS_EXTENT_DATA_KEY;
47 setup_items_for_insert(root, &path, &key, &value_len, value_len,
48 value_len + sizeof(struct btrfs_item), 1);
49 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
50 btrfs_set_file_extent_generation(leaf, fi, 1);
51 btrfs_set_file_extent_type(leaf, fi, type);
52 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr);
53 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len);
54 btrfs_set_file_extent_offset(leaf, fi, offset);
55 btrfs_set_file_extent_num_bytes(leaf, fi, len);
56 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes);
57 btrfs_set_file_extent_compression(leaf, fi, compression);
58 btrfs_set_file_extent_encryption(leaf, fi, 0);
59 btrfs_set_file_extent_other_encoding(leaf, fi, 0);
62 static void insert_inode_item_key(struct btrfs_root *root)
64 struct btrfs_path path;
65 struct extent_buffer *leaf = root->node;
69 memset(&path, 0, sizeof(path));
74 key.objectid = BTRFS_INODE_ITEM_KEY;
75 key.type = BTRFS_INODE_ITEM_KEY;
78 setup_items_for_insert(root, &path, &key, &value_len, value_len,
79 value_len + sizeof(struct btrfs_item), 1);
83 * Build the most complicated map of extents the earth has ever seen. We want
84 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
85 * diagram of how the extents will look though this may not be possible we still
86 * want to make sure everything acts normally (the last number is not inclusive)
88 * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288]
89 * [hole ][inline][ hole ][ regular ][regular1 split][ hole ]
91 * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056]
92 * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ]
94 * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ]
95 * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent]
100 static void setup_file_extents(struct btrfs_root *root)
103 u64 disk_bytenr = 1 * 1024 * 1024;
106 /* First we want a hole */
107 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
113 * Now we want an inline extent, I don't think this is possible but hey
114 * why not? Also keep in mind if we have an inline extent it counts as
115 * the whole first page. If we were to expand it we would have to cow
116 * and we wouldn't have an inline extent anymore.
118 insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0,
123 /* Now another hole */
124 insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0,
129 /* Now for a regular extent */
130 insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096,
131 BTRFS_FILE_EXTENT_REG, 0, slot);
137 * Now for 3 extents that were split from a hole punch so we test
140 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
141 BTRFS_FILE_EXTENT_REG, 0, slot);
144 insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG,
148 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
149 BTRFS_FILE_EXTENT_REG, 0, slot);
152 disk_bytenr += 16384;
154 /* Now for a unwritten prealloc extent */
155 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
156 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
161 * We want to jack up disk_bytenr a little more so the em stuff doesn't
167 * Now for a partially written prealloc extent, basically the same as
168 * the hole punch example above. Ram_bytes never changes when you mark
169 * extents written btw.
171 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384,
172 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
175 insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384,
176 BTRFS_FILE_EXTENT_REG, 0, slot);
179 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384,
180 BTRFS_FILE_EXTENT_PREALLOC, 0, slot);
183 disk_bytenr += 16384;
185 /* Now a normal compressed extent */
186 insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096,
187 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
193 /* Now a split compressed extent */
194 insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096,
195 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
198 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096,
199 BTRFS_FILE_EXTENT_REG, 0, slot);
202 insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096,
203 BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot);
208 /* Now extents that have a hole but no hole extent */
209 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
210 BTRFS_FILE_EXTENT_REG, 0, slot);
214 insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096,
215 BTRFS_FILE_EXTENT_REG, 0, slot);
218 static unsigned long prealloc_only = 0;
219 static unsigned long compressed_only = 0;
220 static unsigned long vacancy_only = 0;
222 static noinline int test_btrfs_get_extent(void)
224 struct inode *inode = NULL;
225 struct btrfs_root *root = NULL;
226 struct extent_map *em = NULL;
232 inode = btrfs_new_test_inode();
234 test_msg("Couldn't allocate inode\n");
238 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
239 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
240 BTRFS_I(inode)->location.offset = 0;
242 root = btrfs_alloc_dummy_root();
244 test_msg("Couldn't allocate root\n");
249 * We do this since btrfs_get_extent wants to assign em->bdev to
250 * root->fs_info->fs_devices->latest_bdev.
252 root->fs_info = btrfs_alloc_dummy_fs_info();
253 if (!root->fs_info) {
254 test_msg("Couldn't allocate dummy fs info\n");
258 root->node = alloc_dummy_extent_buffer(0, 4096);
260 test_msg("Couldn't allocate dummy buffer\n");
265 * We will just free a dummy node if it's ref count is 2 so we need an
266 * extra ref so our searches don't accidently release our page.
268 extent_buffer_get(root->node);
269 btrfs_set_header_nritems(root->node, 0);
270 btrfs_set_header_level(root->node, 0);
273 /* First with no extents */
274 BTRFS_I(inode)->root = root;
275 em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0);
278 test_msg("Got an error when we shouldn't have\n");
281 if (em->block_start != EXTENT_MAP_HOLE) {
282 test_msg("Expected a hole, got %llu\n", em->block_start);
285 if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
286 test_msg("Vacancy flag wasn't set properly\n");
290 btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
293 * All of the magic numbers are based on the mapping setup in
294 * setup_file_extents, so if you change anything there you need to
295 * update the comment and update the expected values below.
297 setup_file_extents(root);
299 em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0);
301 test_msg("Got an error when we shouldn't have\n");
304 if (em->block_start != EXTENT_MAP_HOLE) {
305 test_msg("Expected a hole, got %llu\n", em->block_start);
308 if (em->start != 0 || em->len != 5) {
309 test_msg("Unexpected extent wanted start 0 len 5, got start "
310 "%llu len %llu\n", em->start, em->len);
313 if (em->flags != 0) {
314 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
317 offset = em->start + em->len;
320 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
322 test_msg("Got an error when we shouldn't have\n");
325 if (em->block_start != EXTENT_MAP_INLINE) {
326 test_msg("Expected an inline, got %llu\n", em->block_start);
329 if (em->start != offset || em->len != 4091) {
330 test_msg("Unexpected extent wanted start %llu len 1, got start "
331 "%llu len %llu\n", offset, em->start, em->len);
334 if (em->flags != 0) {
335 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
339 * We don't test anything else for inline since it doesn't get set
340 * unless we have a page for it to write into. Maybe we should change
343 offset = em->start + em->len;
346 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
348 test_msg("Got an error when we shouldn't have\n");
351 if (em->block_start != EXTENT_MAP_HOLE) {
352 test_msg("Expected a hole, got %llu\n", em->block_start);
355 if (em->start != offset || em->len != 4) {
356 test_msg("Unexpected extent wanted start %llu len 4, got start "
357 "%llu len %llu\n", offset, em->start, em->len);
360 if (em->flags != 0) {
361 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
364 offset = em->start + em->len;
368 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
370 test_msg("Got an error when we shouldn't have\n");
373 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
374 test_msg("Expected a real extent, got %llu\n", em->block_start);
377 if (em->start != offset || em->len != 4095) {
378 test_msg("Unexpected extent wanted start %llu len 4095, got "
379 "start %llu len %llu\n", offset, em->start, em->len);
382 if (em->flags != 0) {
383 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
386 if (em->orig_start != em->start) {
387 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
391 offset = em->start + em->len;
394 /* The next 3 are split extents */
395 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
397 test_msg("Got an error when we shouldn't have\n");
400 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
401 test_msg("Expected a real extent, got %llu\n", em->block_start);
404 if (em->start != offset || em->len != 4096) {
405 test_msg("Unexpected extent wanted start %llu len 4096, got "
406 "start %llu len %llu\n", offset, em->start, em->len);
409 if (em->flags != 0) {
410 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
413 if (em->orig_start != em->start) {
414 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
418 disk_bytenr = em->block_start;
419 orig_start = em->start;
420 offset = em->start + em->len;
423 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
425 test_msg("Got an error when we shouldn't have\n");
428 if (em->block_start != EXTENT_MAP_HOLE) {
429 test_msg("Expected a hole, got %llu\n", em->block_start);
432 if (em->start != offset || em->len != 4096) {
433 test_msg("Unexpected extent wanted start %llu len 4096, got "
434 "start %llu len %llu\n", offset, em->start, em->len);
437 if (em->flags != 0) {
438 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
441 offset = em->start + em->len;
444 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
446 test_msg("Got an error when we shouldn't have\n");
449 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
450 test_msg("Expected a real extent, got %llu\n", em->block_start);
453 if (em->start != offset || em->len != 8192) {
454 test_msg("Unexpected extent wanted start %llu len 8192, got "
455 "start %llu len %llu\n", offset, em->start, em->len);
458 if (em->flags != 0) {
459 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
462 if (em->orig_start != orig_start) {
463 test_msg("Wrong orig offset, want %llu, have %llu\n",
464 orig_start, em->orig_start);
467 disk_bytenr += (em->start - orig_start);
468 if (em->block_start != disk_bytenr) {
469 test_msg("Wrong block start, want %llu, have %llu\n",
470 disk_bytenr, em->block_start);
473 offset = em->start + em->len;
476 /* Prealloc extent */
477 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
479 test_msg("Got an error when we shouldn't have\n");
482 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
483 test_msg("Expected a real extent, got %llu\n", em->block_start);
486 if (em->start != offset || em->len != 4096) {
487 test_msg("Unexpected extent wanted start %llu len 4096, got "
488 "start %llu len %llu\n", offset, em->start, em->len);
491 if (em->flags != prealloc_only) {
492 test_msg("Unexpected flags set, want %lu have %lu\n",
493 prealloc_only, em->flags);
496 if (em->orig_start != em->start) {
497 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
501 offset = em->start + em->len;
504 /* The next 3 are a half written prealloc extent */
505 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
507 test_msg("Got an error when we shouldn't have\n");
510 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
511 test_msg("Expected a real extent, got %llu\n", em->block_start);
514 if (em->start != offset || em->len != 4096) {
515 test_msg("Unexpected extent wanted start %llu len 4096, got "
516 "start %llu len %llu\n", offset, em->start, em->len);
519 if (em->flags != prealloc_only) {
520 test_msg("Unexpected flags set, want %lu have %lu\n",
521 prealloc_only, em->flags);
524 if (em->orig_start != em->start) {
525 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
529 disk_bytenr = em->block_start;
530 orig_start = em->start;
531 offset = em->start + em->len;
534 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
536 test_msg("Got an error when we shouldn't have\n");
539 if (em->block_start >= EXTENT_MAP_HOLE) {
540 test_msg("Expected a real extent, got %llu\n", em->block_start);
543 if (em->start != offset || em->len != 4096) {
544 test_msg("Unexpected extent wanted start %llu len 4096, got "
545 "start %llu len %llu\n", offset, em->start, em->len);
548 if (em->flags != 0) {
549 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
552 if (em->orig_start != orig_start) {
553 test_msg("Unexpected orig offset, wanted %llu, have %llu\n",
554 orig_start, em->orig_start);
557 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
558 test_msg("Unexpected block start, wanted %llu, have %llu\n",
559 disk_bytenr + (em->start - em->orig_start),
563 offset = em->start + em->len;
566 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
568 test_msg("Got an error when we shouldn't have\n");
571 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
572 test_msg("Expected a real extent, got %llu\n", em->block_start);
575 if (em->start != offset || em->len != 8192) {
576 test_msg("Unexpected extent wanted start %llu len 8192, got "
577 "start %llu len %llu\n", offset, em->start, em->len);
580 if (em->flags != prealloc_only) {
581 test_msg("Unexpected flags set, want %lu have %lu\n",
582 prealloc_only, em->flags);
585 if (em->orig_start != orig_start) {
586 test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start,
590 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) {
591 test_msg("Unexpected block start, wanted %llu, have %llu\n",
592 disk_bytenr + (em->start - em->orig_start),
596 offset = em->start + em->len;
599 /* Now for the compressed extent */
600 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
602 test_msg("Got an error when we shouldn't have\n");
605 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
606 test_msg("Expected a real extent, got %llu\n", em->block_start);
609 if (em->start != offset || em->len != 8192) {
610 test_msg("Unexpected extent wanted start %llu len 8192, got "
611 "start %llu len %llu\n", offset, em->start, em->len);
614 if (em->flags != compressed_only) {
615 test_msg("Unexpected flags set, want %lu have %lu\n",
616 compressed_only, em->flags);
619 if (em->orig_start != em->start) {
620 test_msg("Wrong orig offset, want %llu, have %llu\n",
621 em->start, em->orig_start);
624 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
625 test_msg("Unexpected compress type, wanted %d, got %d\n",
626 BTRFS_COMPRESS_ZLIB, em->compress_type);
629 offset = em->start + em->len;
632 /* Split compressed extent */
633 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
635 test_msg("Got an error when we shouldn't have\n");
638 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
639 test_msg("Expected a real extent, got %llu\n", em->block_start);
642 if (em->start != offset || em->len != 4096) {
643 test_msg("Unexpected extent wanted start %llu len 4096, got "
644 "start %llu len %llu\n", offset, em->start, em->len);
647 if (em->flags != compressed_only) {
648 test_msg("Unexpected flags set, want %lu have %lu\n",
649 compressed_only, em->flags);
652 if (em->orig_start != em->start) {
653 test_msg("Wrong orig offset, want %llu, have %llu\n",
654 em->start, em->orig_start);
657 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
658 test_msg("Unexpected compress type, wanted %d, got %d\n",
659 BTRFS_COMPRESS_ZLIB, em->compress_type);
662 disk_bytenr = em->block_start;
663 orig_start = em->start;
664 offset = em->start + em->len;
667 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
669 test_msg("Got an error when we shouldn't have\n");
672 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
673 test_msg("Expected a real extent, got %llu\n", em->block_start);
676 if (em->start != offset || em->len != 4096) {
677 test_msg("Unexpected extent wanted start %llu len 4096, got "
678 "start %llu len %llu\n", offset, em->start, em->len);
681 if (em->flags != 0) {
682 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
685 if (em->orig_start != em->start) {
686 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
690 offset = em->start + em->len;
693 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
695 test_msg("Got an error when we shouldn't have\n");
698 if (em->block_start != disk_bytenr) {
699 test_msg("Block start does not match, want %llu got %llu\n",
700 disk_bytenr, em->block_start);
703 if (em->start != offset || em->len != 8192) {
704 test_msg("Unexpected extent wanted start %llu len 8192, got "
705 "start %llu len %llu\n", offset, em->start, em->len);
708 if (em->flags != compressed_only) {
709 test_msg("Unexpected flags set, want %lu have %lu\n",
710 compressed_only, em->flags);
713 if (em->orig_start != orig_start) {
714 test_msg("Wrong orig offset, want %llu, have %llu\n",
715 em->start, orig_start);
718 if (em->compress_type != BTRFS_COMPRESS_ZLIB) {
719 test_msg("Unexpected compress type, wanted %d, got %d\n",
720 BTRFS_COMPRESS_ZLIB, em->compress_type);
723 offset = em->start + em->len;
726 /* A hole between regular extents but no hole extent */
727 em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0);
729 test_msg("Got an error when we shouldn't have\n");
732 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
733 test_msg("Expected a real extent, got %llu\n", em->block_start);
736 if (em->start != offset || em->len != 4096) {
737 test_msg("Unexpected extent wanted start %llu len 4096, got "
738 "start %llu len %llu\n", offset, em->start, em->len);
741 if (em->flags != 0) {
742 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
745 if (em->orig_start != em->start) {
746 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
750 offset = em->start + em->len;
753 em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0);
755 test_msg("Got an error when we shouldn't have\n");
758 if (em->block_start != EXTENT_MAP_HOLE) {
759 test_msg("Expected a hole extent, got %llu\n", em->block_start);
763 * Currently we just return a length that we requested rather than the
764 * length of the actual hole, if this changes we'll have to change this
767 if (em->start != offset || em->len != 12288) {
768 test_msg("Unexpected extent wanted start %llu len 12288, got "
769 "start %llu len %llu\n", offset, em->start, em->len);
772 if (em->flags != vacancy_only) {
773 test_msg("Unexpected flags set, want %lu have %lu\n",
774 vacancy_only, em->flags);
777 if (em->orig_start != em->start) {
778 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
782 offset = em->start + em->len;
785 em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0);
787 test_msg("Got an error when we shouldn't have\n");
790 if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
791 test_msg("Expected a real extent, got %llu\n", em->block_start);
794 if (em->start != offset || em->len != 4096) {
795 test_msg("Unexpected extent wanted start %llu len 4096, got "
796 "start %llu len %llu\n", offset, em->start, em->len);
799 if (em->flags != 0) {
800 test_msg("Unexpected flags set, want 0 have %lu\n", em->flags);
803 if (em->orig_start != em->start) {
804 test_msg("Wrong orig offset, want %llu, have %llu\n", em->start,
813 btrfs_free_dummy_root(root);
817 static int test_hole_first(void)
819 struct inode *inode = NULL;
820 struct btrfs_root *root = NULL;
821 struct extent_map *em = NULL;
824 inode = btrfs_new_test_inode();
826 test_msg("Couldn't allocate inode\n");
830 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
831 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
832 BTRFS_I(inode)->location.offset = 0;
834 root = btrfs_alloc_dummy_root();
836 test_msg("Couldn't allocate root\n");
840 root->fs_info = btrfs_alloc_dummy_fs_info();
841 if (!root->fs_info) {
842 test_msg("Couldn't allocate dummy fs info\n");
846 root->node = alloc_dummy_extent_buffer(0, 4096);
848 test_msg("Couldn't allocate dummy buffer\n");
852 extent_buffer_get(root->node);
853 btrfs_set_header_nritems(root->node, 0);
854 btrfs_set_header_level(root->node, 0);
855 BTRFS_I(inode)->root = root;
859 * Need a blank inode item here just so we don't confuse
862 insert_inode_item_key(root);
863 insert_extent(root, 4096, 4096, 4096, 0, 4096, 4096,
864 BTRFS_FILE_EXTENT_REG, 0, 1);
865 em = btrfs_get_extent(inode, NULL, 0, 0, 8192, 0);
867 test_msg("Got an error when we shouldn't have\n");
870 if (em->block_start != EXTENT_MAP_HOLE) {
871 test_msg("Expected a hole, got %llu\n", em->block_start);
874 if (em->start != 0 || em->len != 4096) {
875 test_msg("Unexpected extent wanted start 0 len 4096, got start "
876 "%llu len %llu\n", em->start, em->len);
879 if (em->flags != vacancy_only) {
880 test_msg("Wrong flags, wanted %lu, have %lu\n", vacancy_only,
886 em = btrfs_get_extent(inode, NULL, 0, 4096, 8192, 0);
888 test_msg("Got an error when we shouldn't have\n");
891 if (em->block_start != 4096) {
892 test_msg("Expected a real extent, got %llu\n", em->block_start);
895 if (em->start != 4096 || em->len != 4096) {
896 test_msg("Unexpected extent wanted start 4096 len 4096, got "
897 "start %llu len %llu\n", em->start, em->len);
900 if (em->flags != 0) {
901 test_msg("Unexpected flags set, wanted 0 got %lu\n",
910 btrfs_free_dummy_root(root);
914 int btrfs_test_inodes(void)
918 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
919 set_bit(EXTENT_FLAG_VACANCY, &vacancy_only);
920 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
922 test_msg("Running btrfs_get_extent tests\n");
923 ret = test_btrfs_get_extent();
926 test_msg("Running hole first btrfs_get_extent test\n");
927 return test_hole_first();