summaryrefslogtreecommitdiffstats
path: root/fs/btrfs/tests/qgroup-tests.c
blob: 412b910b04cc0712fa64cf6d1ea00b30d7e9a2e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2013 Facebook.  All rights reserved.
 */

#include <linux/types.h>
#include "btrfs-tests.h"
#include "../ctree.h"
#include "../transaction.h"
#include "../disk-io.h"
#include "../qgroup.h"
#include "../backref.h"

static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
				  u64 num_bytes, u64 parent, u64 root_objectid)
{
	struct btrfs_trans_handle trans;
	struct btrfs_extent_item *item;
	struct btrfs_extent_inline_ref *iref;
	struct btrfs_tree_block_info *block_info;
	struct btrfs_path *path;
	struct extent_buffer *leaf;
	struct btrfs_key ins;
	u32 size = sizeof(*item) + sizeof(*iref) + sizeof(*block_info);
	int ret;

	btrfs_init_dummy_trans(&trans, NULL);

	ins.objectid = bytenr;
	ins.type = BTRFS_EXTENT_ITEM_KEY;
	ins.offset = num_bytes;

	path = btrfs_alloc_path();
	if (!path) {
		test_err("couldn't allocate path");
		return -ENOMEM;
	}

	path->leave_spinning = 1;
	ret = btrfs_insert_empty_item(&trans, root, path, &ins, size);
	if (ret) {
		test_err("couldn't insert ref %d", ret);
		btrfs_free_path(path);
		return ret;
	}

	leaf = path->nodes[0];
	item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
	btrfs_set_extent_refs(leaf, item, 1);
	btrfs_set_extent_generation(leaf, item, 1);
	btrfs_set_extent_flags(leaf, item, BTRFS_EXTENT_FLAG_TREE_BLOCK);
	block_info = (struct btrfs_tree_block_info *)(item + 1);
	btrfs_set_tree_block_level(leaf, block_info, 0);
	iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
	if (parent > 0) {
		btrfs_set_extent_inline_ref_type(leaf, iref,
						 BTRFS_SHARED_BLOCK_REF_KEY);
		btrfs_set_extent_inline_ref_offset(leaf, iref, parent);
	} else {
		btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_TREE_BLOCK_REF_KEY);
		btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid);
	}
	btrfs_free_path(path);
	return 0;
}

static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
			u64 parent, u64 root_objectid)
{
	struct btrfs_trans_handle trans;
	struct btrfs_extent_item *item;
	struct btrfs_path *path;
	struct btrfs_key key;
	u64 refs;
	int ret;

	btrfs_init_dummy_trans(&trans, NULL);

	key.objectid = bytenr;
	key.type = BTRFS_EXTENT_ITEM_KEY;
	key.offset = num_bytes;

	path = btrfs_alloc_path();
	if (!path) {
		test_err("couldn't allocate path");
		return -ENOMEM;
	}

	path->leave_spinning = 1;
	ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
	if (ret) {
		test_err("couldn't find extent ref");
		btrfs_free_path(path);
		return ret;
	}

	item = btrfs_item_ptr(path->nodes[0], path->slots[0],
			      struct btrfs_extent_item);
	refs = btrfs_extent_refs(path->nodes[0], item);
	btrfs_set_extent_refs(path->nodes[0], item, refs + 1);
	btrfs_release_path(path);

	key.objectid = bytenr;
	if (parent) {
		key.type = BTRFS_SHARED_BLOCK_REF_KEY;
		key.offset = parent;
	} else {
		key.type = BTRFS_TREE_BLOCK_REF_KEY;
		key.offset = root_objectid;
	}

	ret = btrfs_insert_empty_item(&trans, root, path, &key, 0);
	if (ret)
		test_err("failed to insert backref");
	btrfs_free_path(path);
	return ret;
}

static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
			      u64 num_bytes)
{
	struct btrfs_trans_handle trans;
	struct btrfs_key key;
	struct btrfs_path *path;
	int ret;

	btrfs_init_dummy_trans(&trans, NULL);

	key.objectid = bytenr;
	key.type = BTRFS_EXTENT_ITEM_KEY;
	key.offset = num_bytes;

	path = btrfs_alloc_path();
	if (!path) {
		test_err("couldn't allocate path");
		return -ENOMEM;
	}
	path->leave_spinning = 1;

	ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
	if (ret) {
		test_err("didn't find our key %d", ret);
		btrfs_free_path(path);
		return ret;
	}
	btrfs_del_item(&trans, root, path);
	btrfs_free_path(path);
	return 0;
}

static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
			     u64 num_bytes, u64 parent, u64 root_objectid)
{
	struct btrfs_trans_handle trans;
	struct btrfs_extent_item *item;
	struct btrfs_path *path;
	struct btrfs_key key;
	u64 refs;
	int ret;

	btrfs_init_dummy_trans(&trans, NULL);

	key.objectid = bytenr;
	key.type = BTRFS_EXTENT_ITEM_KEY;
	key.offset = num_bytes;

	path = btrfs_alloc_path();
	if (!path) {
		test_err("couldn't allocate path");
		return -ENOMEM;
	}

	path->leave_spinning = 1;
	ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
	if (ret) {
		test_err("couldn't find extent ref");
		btrfs_free_path(path);
		return ret;
	}

	item = btrfs_item_ptr(path->nodes[0], path->slots[0],
			      struct btrfs_extent_item);
	refs = btrfs_extent_refs(path->nodes[0], item);
	btrfs_set_extent_refs(path->nodes[0], item, refs - 1);
	btrfs_release_path(path);

	key.objectid = bytenr;
	if (parent) {
		key.type = BTRFS_SHARED_BLOCK_REF_KEY;
		key.offset = parent;
	} else {
		key.type = BTRFS_TREE_BLOCK_REF_KEY;
		key.offset = root_objectid;
	}

	ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
	if (ret) {
		test_err("couldn't find backref %d", ret);
		btrfs_free_path(path);
		return ret;
	}
	btrfs_del_item(&trans, root, path);
	btrfs_free_path(path);
	return ret;
}

static int test_no_shared_qgroup(struct btrfs_root *root,
		u32 sectorsize, u32 nodesize)
{
	struct btrfs_trans_handle trans;
	struct btrfs_fs_info *fs_info = root->fs_info;
	struct ulist *old_roots = NULL;
	struct ulist *new_roots = NULL;
	int ret;

	btrfs_init_dummy_trans(&trans, fs_info);

	test_msg("qgroup basic add");
	ret = btrfs_create_qgroup(&trans, BTRFS_FS_TREE_OBJECTID);
	if (ret) {
		test_err("couldn't create a qgroup %d", ret);
		return ret;
	}

	/*
	 * Since the test trans doesn't have the complicated delayed refs,
	 * we can only call btrfs_qgroup_account_extent() directly to test
	 * quota.
	 */
	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
				BTRFS_FS_TREE_OBJECTID);
	if (ret)
		return ret;

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		ulist_free(new_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
					  new_roots);
	if (ret) {
		test_err("couldn't account space for a qgroup %d", ret);
		return ret;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
				nodesize, nodesize)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}
	old_roots = NULL;
	new_roots = NULL;

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = remove_extent_item(root, nodesize, nodesize);
	if (ret)
		return -EINVAL;

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		ulist_free(new_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
					  new_roots);
	if (ret) {
		test_err("couldn't account space for a qgroup %d", ret);
		return -EINVAL;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}

	return 0;
}

/*
 * Add a ref for two different roots to make sure the shared value comes out
 * right, also remove one of the roots and make sure the exclusive count is
 * adjusted properly.
 */
static int test_multiple_refs(struct btrfs_root *root,
		u32 sectorsize, u32 nodesize)
{
	struct btrfs_trans_handle trans;
	struct btrfs_fs_info *fs_info = root->fs_info;
	struct ulist *old_roots = NULL;
	struct ulist *new_roots = NULL;
	int ret;

	btrfs_init_dummy_trans(&trans, fs_info);

	test_msg("qgroup multiple refs test");

	/*
	 * We have BTRFS_FS_TREE_OBJECTID created already from the
	 * previous test.
	 */
	ret = btrfs_create_qgroup(&trans, BTRFS_FIRST_FREE_OBJECTID);
	if (ret) {
		test_err("couldn't create a qgroup %d", ret);
		return ret;
	}

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
				BTRFS_FS_TREE_OBJECTID);
	if (ret)
		return ret;

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		ulist_free(new_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
					  new_roots);
	if (ret) {
		test_err("couldn't account space for a qgroup %d", ret);
		return ret;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
				       nodesize, nodesize)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = add_tree_ref(root, nodesize, nodesize, 0,
			BTRFS_FIRST_FREE_OBJECTID);
	if (ret)
		return ret;

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		ulist_free(new_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
					  new_roots);
	if (ret) {
		test_err("couldn't account space for a qgroup %d", ret);
		return ret;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
					nodesize, 0)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
					nodesize, 0)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = remove_extent_ref(root, nodesize, nodesize, 0,
				BTRFS_FIRST_FREE_OBJECTID);
	if (ret)
		return ret;

	ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
			false);
	if (ret) {
		ulist_free(old_roots);
		ulist_free(new_roots);
		test_err("couldn't find old roots: %d", ret);
		return ret;
	}

	ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
					  new_roots);
	if (ret) {
		test_err("couldn't account space for a qgroup %d", ret);
		return ret;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
					0, 0)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}

	if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
					nodesize, nodesize)) {
		test_err("qgroup counts didn't match expected values");
		return -EINVAL;
	}

	return 0;
}

int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
{
	struct btrfs_fs_info *fs_info = NULL;
	struct btrfs_root *root;
	struct btrfs_root *tmp_root;
	int ret = 0;

	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
	if (!fs_info) {
		test_err("couldn't allocate dummy fs info");
		return -ENOMEM;
	}

	root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(root)) {
		test_err("couldn't allocate root");
		ret = PTR_ERR(root);
		goto out;
	}

	/* We are using this root as our extent root */
	root->fs_info->extent_root = root;

	/*
	 * Some of the paths we test assume we have a filled out fs_info, so we
	 * just need to add the root in there so we don't panic.
	 */
	root->fs_info->tree_root = root;
	root->fs_info->quota_root = root;
	set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);

	/*
	 * Can't use bytenr 0, some things freak out
	 * *cough*backref walking code*cough*
	 */
	root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
	if (!root->node) {
		test_err("couldn't allocate dummy buffer");
		ret = -ENOMEM;
		goto out;
	}
	btrfs_set_header_level(root->node, 0);
	btrfs_set_header_nritems(root->node, 0);
	root->alloc_bytenr += 2 * nodesize;

	tmp_root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(tmp_root)) {
		test_err("couldn't allocate a fs root");
		ret = PTR_ERR(tmp_root);
		goto out;
	}

	tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID;
	root->fs_info->fs_root = tmp_root;
	ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
	if (ret) {
		test_err("couldn't insert fs root %d", ret);
		goto out;
	}

	tmp_root = btrfs_alloc_dummy_root(fs_info);
	if (IS_ERR(tmp_root)) {
		test_err("couldn't allocate a fs root");
		ret = PTR_ERR(tmp_root);
		goto out;
	}

	tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID;
	ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
	if (ret) {
		test_err("couldn't insert fs root %d", ret);
		goto out;
	}

	test_msg("running qgroup tests");
	ret = test_no_shared_qgroup(root, sectorsize, nodesize);
	if (ret)
		goto out;
	ret = test_multiple_refs(root, sectorsize, nodesize);
out:
	btrfs_free_dummy_root(root);
	btrfs_free_dummy_fs_info(fs_info);
	return ret;
}