fs/btrfs/tests/qgroup-tests.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2013 Facebook.  All rights reserved.
   4  */
   5
   6 #include <linux/types.h>
   7 #include "btrfs-tests.h"
   8 #include "../ctree.h"
   9 #include "../transaction.h"
  10 #include "../disk-io.h"
  11 #include "../qgroup.h"
  12 #include "../backref.h"
  13
  14 static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
  15                                   u64 num_bytes, u64 parent, u64 root_objectid)
  16 {
  17         struct btrfs_trans_handle trans;
  18         struct btrfs_extent_item *item;
  19         struct btrfs_extent_inline_ref *iref;
  20         struct btrfs_tree_block_info *block_info;
  21         struct btrfs_path *path;
  22         struct extent_buffer *leaf;
  23         struct btrfs_key ins;
  24         u32 size = sizeof(*item) + sizeof(*iref) + sizeof(*block_info);
  25         int ret;
  26
  27         btrfs_init_dummy_trans(&trans, NULL);
  28
  29         ins.objectid = bytenr;
  30         ins.type = BTRFS_EXTENT_ITEM_KEY;
  31         ins.offset = num_bytes;
  32
  33         path = btrfs_alloc_path();
  34         if (!path) {
  35                 test_std_err(TEST_ALLOC_ROOT);
  36                 return -ENOMEM;
  37         }
  38
  39         ret = btrfs_insert_empty_item(&trans, root, path, &ins, size);
  40         if (ret) {
  41                 test_err("couldn't insert ref %d", ret);
  42                 btrfs_free_path(path);
  43                 return ret;
  44         }
  45
  46         leaf = path->nodes[0];
  47         item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
  48         btrfs_set_extent_refs(leaf, item, 1);
  49         btrfs_set_extent_generation(leaf, item, 1);
  50         btrfs_set_extent_flags(leaf, item, BTRFS_EXTENT_FLAG_TREE_BLOCK);
  51         block_info = (struct btrfs_tree_block_info *)(item + 1);
  52         btrfs_set_tree_block_level(leaf, block_info, 0);
  53         iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
  54         if (parent > 0) {
  55                 btrfs_set_extent_inline_ref_type(leaf, iref,
  56                                                  BTRFS_SHARED_BLOCK_REF_KEY);
  57                 btrfs_set_extent_inline_ref_offset(leaf, iref, parent);
  58         } else {
  59                 btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_TREE_BLOCK_REF_KEY);
  60                 btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid);
  61         }
  62         btrfs_free_path(path);
  63         return 0;
  64 }
  65
  66 static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
  67                         u64 parent, u64 root_objectid)
  68 {
  69         struct btrfs_trans_handle trans;
  70         struct btrfs_extent_item *item;
  71         struct btrfs_path *path;
  72         struct btrfs_key key;
  73         u64 refs;
  74         int ret;
  75
  76         btrfs_init_dummy_trans(&trans, NULL);
  77
  78         key.objectid = bytenr;
  79         key.type = BTRFS_EXTENT_ITEM_KEY;
  80         key.offset = num_bytes;
  81
  82         path = btrfs_alloc_path();
  83         if (!path) {
  84                 test_std_err(TEST_ALLOC_ROOT);
  85                 return -ENOMEM;
  86         }
  87
  88         ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
  89         if (ret) {
  90                 test_err("couldn't find extent ref");
  91                 btrfs_free_path(path);
  92                 return ret;
  93         }
  94
  95         item = btrfs_item_ptr(path->nodes[0], path->slots[0],
  96                               struct btrfs_extent_item);
  97         refs = btrfs_extent_refs(path->nodes[0], item);
  98         btrfs_set_extent_refs(path->nodes[0], item, refs + 1);
  99         btrfs_release_path(path);
 100
 101         key.objectid = bytenr;
 102         if (parent) {
 103                 key.type = BTRFS_SHARED_BLOCK_REF_KEY;
 104                 key.offset = parent;
 105         } else {
 106                 key.type = BTRFS_TREE_BLOCK_REF_KEY;
 107                 key.offset = root_objectid;
 108         }
 109
 110         ret = btrfs_insert_empty_item(&trans, root, path, &key, 0);
 111         if (ret)
 112                 test_err("failed to insert backref");
 113         btrfs_free_path(path);
 114         return ret;
 115 }
 116
 117 static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
 118                               u64 num_bytes)
 119 {
 120         struct btrfs_trans_handle trans;
 121         struct btrfs_key key;
 122         struct btrfs_path *path;
 123         int ret;
 124
 125         btrfs_init_dummy_trans(&trans, NULL);
 126
 127         key.objectid = bytenr;
 128         key.type = BTRFS_EXTENT_ITEM_KEY;
 129         key.offset = num_bytes;
 130
 131         path = btrfs_alloc_path();
 132         if (!path) {
 133                 test_std_err(TEST_ALLOC_ROOT);
 134                 return -ENOMEM;
 135         }
 136
 137         ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
 138         if (ret) {
 139                 test_err("didn't find our key %d", ret);
 140                 btrfs_free_path(path);
 141                 return ret;
 142         }
 143         btrfs_del_item(&trans, root, path);
 144         btrfs_free_path(path);
 145         return 0;
 146 }
 147
 148 static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
 149                              u64 num_bytes, u64 parent, u64 root_objectid)
 150 {
 151         struct btrfs_trans_handle trans;
 152         struct btrfs_extent_item *item;
 153         struct btrfs_path *path;
 154         struct btrfs_key key;
 155         u64 refs;
 156         int ret;
 157
 158         btrfs_init_dummy_trans(&trans, NULL);
 159
 160         key.objectid = bytenr;
 161         key.type = BTRFS_EXTENT_ITEM_KEY;
 162         key.offset = num_bytes;
 163
 164         path = btrfs_alloc_path();
 165         if (!path) {
 166                 test_std_err(TEST_ALLOC_ROOT);
 167                 return -ENOMEM;
 168         }
 169
 170         ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
 171         if (ret) {
 172                 test_err("couldn't find extent ref");
 173                 btrfs_free_path(path);
 174                 return ret;
 175         }
 176
 177         item = btrfs_item_ptr(path->nodes[0], path->slots[0],
 178                               struct btrfs_extent_item);
 179         refs = btrfs_extent_refs(path->nodes[0], item);
 180         btrfs_set_extent_refs(path->nodes[0], item, refs - 1);
 181         btrfs_release_path(path);
 182
 183         key.objectid = bytenr;
 184         if (parent) {
 185                 key.type = BTRFS_SHARED_BLOCK_REF_KEY;
 186                 key.offset = parent;
 187         } else {
 188                 key.type = BTRFS_TREE_BLOCK_REF_KEY;
 189                 key.offset = root_objectid;
 190         }
 191
 192         ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
 193         if (ret) {
 194                 test_err("couldn't find backref %d", ret);
 195                 btrfs_free_path(path);
 196                 return ret;
 197         }
 198         btrfs_del_item(&trans, root, path);
 199         btrfs_free_path(path);
 200         return ret;
 201 }
 202
 203 static int test_no_shared_qgroup(struct btrfs_root *root,
 204                 u32 sectorsize, u32 nodesize)
 205 {
 206         struct btrfs_trans_handle trans;
 207         struct btrfs_fs_info *fs_info = root->fs_info;
 208         struct ulist *old_roots = NULL;
 209         struct ulist *new_roots = NULL;
 210         int ret;
 211
 212         btrfs_init_dummy_trans(&trans, fs_info);
 213
 214         test_msg("running qgroup add/remove tests");
 215         ret = btrfs_create_qgroup(&trans, BTRFS_FS_TREE_OBJECTID);
 216         if (ret) {
 217                 test_err("couldn't create a qgroup %d", ret);
 218                 return ret;
 219         }
 220
 221         /*
 222          * Since the test trans doesn't have the complicated delayed refs,
 223          * we can only call btrfs_qgroup_account_extent() directly to test
 224          * quota.
 225          */
 226         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
 227                         false, false);
 228         if (ret) {
 229                 ulist_free(old_roots);
 230                 test_err("couldn't find old roots: %d", ret);
 231                 return ret;
 232         }
 233
 234         ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
 235                                 BTRFS_FS_TREE_OBJECTID);
 236         if (ret)
 237                 return ret;
 238
 239         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
 240                         false, false);
 241         if (ret) {
 242                 ulist_free(old_roots);
 243                 ulist_free(new_roots);
 244                 test_err("couldn't find old roots: %d", ret);
 245                 return ret;
 246         }
 247
 248         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 249                                           new_roots);
 250         if (ret) {
 251                 test_err("couldn't account space for a qgroup %d", ret);
 252                 return ret;
 253         }
 254
 255         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 256                                 nodesize, nodesize)) {
 257                 test_err("qgroup counts didn't match expected values");
 258                 return -EINVAL;
 259         }
 260         old_roots = NULL;
 261         new_roots = NULL;
 262
 263         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
 264                         false, false);
 265         if (ret) {
 266                 ulist_free(old_roots);
 267                 test_err("couldn't find old roots: %d", ret);
 268                 return ret;
 269         }
 270
 271         ret = remove_extent_item(root, nodesize, nodesize);
 272         if (ret)
 273                 return -EINVAL;
 274
 275         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
 276                         false, false);
 277         if (ret) {
 278                 ulist_free(old_roots);
 279                 ulist_free(new_roots);
 280                 test_err("couldn't find old roots: %d", ret);
 281                 return ret;
 282         }
 283
 284         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 285                                           new_roots);
 286         if (ret) {
 287                 test_err("couldn't account space for a qgroup %d", ret);
 288                 return -EINVAL;
 289         }
 290
 291         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) {
 292                 test_err("qgroup counts didn't match expected values");
 293                 return -EINVAL;
 294         }
 295
 296         return 0;
 297 }
 298
 299 /*
 300  * Add a ref for two different roots to make sure the shared value comes out
 301  * right, also remove one of the roots and make sure the exclusive count is
 302  * adjusted properly.
 303  */
 304 static int test_multiple_refs(struct btrfs_root *root,
 305                 u32 sectorsize, u32 nodesize)
 306 {
 307         struct btrfs_trans_handle trans;
 308         struct btrfs_fs_info *fs_info = root->fs_info;
 309         struct ulist *old_roots = NULL;
 310         struct ulist *new_roots = NULL;
 311         int ret;
 312
 313         btrfs_init_dummy_trans(&trans, fs_info);
 314
 315         test_msg("running qgroup multiple refs test");
 316
 317         /*
 318          * We have BTRFS_FS_TREE_OBJECTID created already from the
 319          * previous test.
 320          */
 321         ret = btrfs_create_qgroup(&trans, BTRFS_FIRST_FREE_OBJECTID);
 322         if (ret) {
 323                 test_err("couldn't create a qgroup %d", ret);
 324                 return ret;
 325         }
 326
 327         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
 328                         false, false);
 329         if (ret) {
 330                 ulist_free(old_roots);
 331                 test_err("couldn't find old roots: %d", ret);
 332                 return ret;
 333         }
 334
 335         ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
 336                                 BTRFS_FS_TREE_OBJECTID);
 337         if (ret)
 338                 return ret;
 339
 340         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
 341                         false, false);
 342         if (ret) {
 343                 ulist_free(old_roots);
 344                 ulist_free(new_roots);
 345                 test_err("couldn't find old roots: %d", ret);
 346                 return ret;
 347         }
 348
 349         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 350                                           new_roots);
 351         if (ret) {
 352                 test_err("couldn't account space for a qgroup %d", ret);
 353                 return ret;
 354         }
 355
 356         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 357                                        nodesize, nodesize)) {
 358                 test_err("qgroup counts didn't match expected values");
 359                 return -EINVAL;
 360         }
 361
 362         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
 363                         false, false);
 364         if (ret) {
 365                 ulist_free(old_roots);
 366                 test_err("couldn't find old roots: %d", ret);
 367                 return ret;
 368         }
 369
 370         ret = add_tree_ref(root, nodesize, nodesize, 0,
 371                         BTRFS_FIRST_FREE_OBJECTID);
 372         if (ret)
 373                 return ret;
 374
 375         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
 376                         false, false);
 377         if (ret) {
 378                 ulist_free(old_roots);
 379                 ulist_free(new_roots);
 380                 test_err("couldn't find old roots: %d", ret);
 381                 return ret;
 382         }
 383
 384         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 385                                           new_roots);
 386         if (ret) {
 387                 test_err("couldn't account space for a qgroup %d", ret);
 388                 return ret;
 389         }
 390
 391         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 392                                         nodesize, 0)) {
 393                 test_err("qgroup counts didn't match expected values");
 394                 return -EINVAL;
 395         }
 396
 397         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
 398                                         nodesize, 0)) {
 399                 test_err("qgroup counts didn't match expected values");
 400                 return -EINVAL;
 401         }
 402
 403         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
 404                         false, false);
 405         if (ret) {
 406                 ulist_free(old_roots);
 407                 test_err("couldn't find old roots: %d", ret);
 408                 return ret;
 409         }
 410
 411         ret = remove_extent_ref(root, nodesize, nodesize, 0,
 412                                 BTRFS_FIRST_FREE_OBJECTID);
 413         if (ret)
 414                 return ret;
 415
 416         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
 417                         false, false);
 418         if (ret) {
 419                 ulist_free(old_roots);
 420                 ulist_free(new_roots);
 421                 test_err("couldn't find old roots: %d", ret);
 422                 return ret;
 423         }
 424
 425         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 426                                           new_roots);
 427         if (ret) {
 428                 test_err("couldn't account space for a qgroup %d", ret);
 429                 return ret;
 430         }
 431
 432         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
 433                                         0, 0)) {
 434                 test_err("qgroup counts didn't match expected values");
 435                 return -EINVAL;
 436         }
 437
 438         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 439                                         nodesize, nodesize)) {
 440                 test_err("qgroup counts didn't match expected values");
 441                 return -EINVAL;
 442         }
 443
 444         return 0;
 445 }
 446
 447 int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 448 {
 449         struct btrfs_fs_info *fs_info = NULL;
 450         struct btrfs_root *root;
 451         struct btrfs_root *tmp_root;
 452         int ret = 0;
 453
 454         fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 455         if (!fs_info) {
 456                 test_std_err(TEST_ALLOC_FS_INFO);
 457                 return -ENOMEM;
 458         }
 459
 460         root = btrfs_alloc_dummy_root(fs_info);
 461         if (IS_ERR(root)) {
 462                 test_std_err(TEST_ALLOC_ROOT);
 463                 ret = PTR_ERR(root);
 464                 goto out;
 465         }
 466
 467         /* We are using this root as our extent root */
 468         root->fs_info->extent_root = root;
 469
 470         /*
 471          * Some of the paths we test assume we have a filled out fs_info, so we
 472          * just need to add the root in there so we don't panic.
 473          */
 474         root->fs_info->tree_root = root;
 475         root->fs_info->quota_root = root;
 476         set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 477
 478         /*
 479          * Can't use bytenr 0, some things freak out
 480          * *cough*backref walking code*cough*
 481          */
 482         root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
 483         if (IS_ERR(root->node)) {
 484                 test_err("couldn't allocate dummy buffer");
 485                 ret = PTR_ERR(root->node);
 486                 goto out;
 487         }
 488         btrfs_set_header_level(root->node, 0);
 489         btrfs_set_header_nritems(root->node, 0);
 490         root->alloc_bytenr += 2 * nodesize;
 491
 492         tmp_root = btrfs_alloc_dummy_root(fs_info);
 493         if (IS_ERR(tmp_root)) {
 494                 test_std_err(TEST_ALLOC_ROOT);
 495                 ret = PTR_ERR(tmp_root);
 496                 goto out;
 497         }
 498
 499         tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID;
 500         root->fs_info->fs_root = tmp_root;
 501         ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
 502         if (ret) {
 503                 test_err("couldn't insert fs root %d", ret);
 504                 goto out;
 505         }
 506         btrfs_put_root(tmp_root);
 507
 508         tmp_root = btrfs_alloc_dummy_root(fs_info);
 509         if (IS_ERR(tmp_root)) {
 510                 test_std_err(TEST_ALLOC_ROOT);
 511                 ret = PTR_ERR(tmp_root);
 512                 goto out;
 513         }
 514
 515         tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID;
 516         ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
 517         if (ret) {
 518                 test_err("couldn't insert fs root %d", ret);
 519                 goto out;
 520         }
 521         btrfs_put_root(tmp_root);
 522
 523         test_msg("running qgroup tests");
 524         ret = test_no_shared_qgroup(root, sectorsize, nodesize);
 525         if (ret)
 526                 goto out;
 527         ret = test_multiple_refs(root, sectorsize, nodesize);
 528 out:
 529         btrfs_free_dummy_root(root);
 530         btrfs_free_dummy_fs_info(fs_info);
 531         return ret;
 532 }