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, false);
 227         if (ret) {
 228                 ulist_free(old_roots);
 229                 test_err("couldn't find old roots: %d", ret);
 230                 return ret;
 231         }
 232
 233         ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
 234                                 BTRFS_FS_TREE_OBJECTID);
 235         if (ret)
 236                 return ret;
 237
 238         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
 239         if (ret) {
 240                 ulist_free(old_roots);
 241                 ulist_free(new_roots);
 242                 test_err("couldn't find old roots: %d", ret);
 243                 return ret;
 244         }
 245
 246         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 247                                           new_roots);
 248         if (ret) {
 249                 test_err("couldn't account space for a qgroup %d", ret);
 250                 return ret;
 251         }
 252
 253         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 254                                 nodesize, nodesize)) {
 255                 test_err("qgroup counts didn't match expected values");
 256                 return -EINVAL;
 257         }
 258         old_roots = NULL;
 259         new_roots = NULL;
 260
 261         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
 262         if (ret) {
 263                 ulist_free(old_roots);
 264                 test_err("couldn't find old roots: %d", ret);
 265                 return ret;
 266         }
 267
 268         ret = remove_extent_item(root, nodesize, nodesize);
 269         if (ret)
 270                 return -EINVAL;
 271
 272         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
 273         if (ret) {
 274                 ulist_free(old_roots);
 275                 ulist_free(new_roots);
 276                 test_err("couldn't find old roots: %d", ret);
 277                 return ret;
 278         }
 279
 280         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 281                                           new_roots);
 282         if (ret) {
 283                 test_err("couldn't account space for a qgroup %d", ret);
 284                 return -EINVAL;
 285         }
 286
 287         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) {
 288                 test_err("qgroup counts didn't match expected values");
 289                 return -EINVAL;
 290         }
 291
 292         return 0;
 293 }
 294
 295 /*
 296  * Add a ref for two different roots to make sure the shared value comes out
 297  * right, also remove one of the roots and make sure the exclusive count is
 298  * adjusted properly.
 299  */
 300 static int test_multiple_refs(struct btrfs_root *root,
 301                 u32 sectorsize, u32 nodesize)
 302 {
 303         struct btrfs_trans_handle trans;
 304         struct btrfs_fs_info *fs_info = root->fs_info;
 305         struct ulist *old_roots = NULL;
 306         struct ulist *new_roots = NULL;
 307         int ret;
 308
 309         btrfs_init_dummy_trans(&trans, fs_info);
 310
 311         test_msg("running qgroup multiple refs test");
 312
 313         /*
 314          * We have BTRFS_FS_TREE_OBJECTID created already from the
 315          * previous test.
 316          */
 317         ret = btrfs_create_qgroup(&trans, BTRFS_FIRST_FREE_OBJECTID);
 318         if (ret) {
 319                 test_err("couldn't create a qgroup %d", ret);
 320                 return ret;
 321         }
 322
 323         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
 324         if (ret) {
 325                 ulist_free(old_roots);
 326                 test_err("couldn't find old roots: %d", ret);
 327                 return ret;
 328         }
 329
 330         ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
 331                                 BTRFS_FS_TREE_OBJECTID);
 332         if (ret)
 333                 return ret;
 334
 335         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
 336         if (ret) {
 337                 ulist_free(old_roots);
 338                 ulist_free(new_roots);
 339                 test_err("couldn't find old roots: %d", ret);
 340                 return ret;
 341         }
 342
 343         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 344                                           new_roots);
 345         if (ret) {
 346                 test_err("couldn't account space for a qgroup %d", ret);
 347                 return ret;
 348         }
 349
 350         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 351                                        nodesize, nodesize)) {
 352                 test_err("qgroup counts didn't match expected values");
 353                 return -EINVAL;
 354         }
 355
 356         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
 357         if (ret) {
 358                 ulist_free(old_roots);
 359                 test_err("couldn't find old roots: %d", ret);
 360                 return ret;
 361         }
 362
 363         ret = add_tree_ref(root, nodesize, nodesize, 0,
 364                         BTRFS_FIRST_FREE_OBJECTID);
 365         if (ret)
 366                 return ret;
 367
 368         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
 369         if (ret) {
 370                 ulist_free(old_roots);
 371                 ulist_free(new_roots);
 372                 test_err("couldn't find old roots: %d", ret);
 373                 return ret;
 374         }
 375
 376         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 377                                           new_roots);
 378         if (ret) {
 379                 test_err("couldn't account space for a qgroup %d", ret);
 380                 return ret;
 381         }
 382
 383         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 384                                         nodesize, 0)) {
 385                 test_err("qgroup counts didn't match expected values");
 386                 return -EINVAL;
 387         }
 388
 389         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
 390                                         nodesize, 0)) {
 391                 test_err("qgroup counts didn't match expected values");
 392                 return -EINVAL;
 393         }
 394
 395         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
 396         if (ret) {
 397                 ulist_free(old_roots);
 398                 test_err("couldn't find old roots: %d", ret);
 399                 return ret;
 400         }
 401
 402         ret = remove_extent_ref(root, nodesize, nodesize, 0,
 403                                 BTRFS_FIRST_FREE_OBJECTID);
 404         if (ret)
 405                 return ret;
 406
 407         ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
 408         if (ret) {
 409                 ulist_free(old_roots);
 410                 ulist_free(new_roots);
 411                 test_err("couldn't find old roots: %d", ret);
 412                 return ret;
 413         }
 414
 415         ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
 416                                           new_roots);
 417         if (ret) {
 418                 test_err("couldn't account space for a qgroup %d", ret);
 419                 return ret;
 420         }
 421
 422         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
 423                                         0, 0)) {
 424                 test_err("qgroup counts didn't match expected values");
 425                 return -EINVAL;
 426         }
 427
 428         if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
 429                                         nodesize, nodesize)) {
 430                 test_err("qgroup counts didn't match expected values");
 431                 return -EINVAL;
 432         }
 433
 434         return 0;
 435 }
 436
 437 int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 438 {
 439         struct btrfs_fs_info *fs_info = NULL;
 440         struct btrfs_root *root;
 441         struct btrfs_root *tmp_root;
 442         int ret = 0;
 443
 444         fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 445         if (!fs_info) {
 446                 test_std_err(TEST_ALLOC_FS_INFO);
 447                 return -ENOMEM;
 448         }
 449
 450         root = btrfs_alloc_dummy_root(fs_info);
 451         if (IS_ERR(root)) {
 452                 test_std_err(TEST_ALLOC_ROOT);
 453                 ret = PTR_ERR(root);
 454                 goto out;
 455         }
 456
 457         /* We are using this root as our extent root */
 458         root->fs_info->extent_root = root;
 459
 460         /*
 461          * Some of the paths we test assume we have a filled out fs_info, so we
 462          * just need to add the root in there so we don't panic.
 463          */
 464         root->fs_info->tree_root = root;
 465         root->fs_info->quota_root = root;
 466         set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
 467
 468         /*
 469          * Can't use bytenr 0, some things freak out
 470          * *cough*backref walking code*cough*
 471          */
 472         root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
 473         if (IS_ERR(root->node)) {
 474                 test_err("couldn't allocate dummy buffer");
 475                 ret = PTR_ERR(root->node);
 476                 goto out;
 477         }
 478         btrfs_set_header_level(root->node, 0);
 479         btrfs_set_header_nritems(root->node, 0);
 480         root->alloc_bytenr += 2 * nodesize;
 481
 482         tmp_root = btrfs_alloc_dummy_root(fs_info);
 483         if (IS_ERR(tmp_root)) {
 484                 test_std_err(TEST_ALLOC_ROOT);
 485                 ret = PTR_ERR(tmp_root);
 486                 goto out;
 487         }
 488
 489         tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID;
 490         root->fs_info->fs_root = tmp_root;
 491         ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
 492         if (ret) {
 493                 test_err("couldn't insert fs root %d", ret);
 494                 goto out;
 495         }
 496         btrfs_put_root(tmp_root);
 497
 498         tmp_root = btrfs_alloc_dummy_root(fs_info);
 499         if (IS_ERR(tmp_root)) {
 500                 test_std_err(TEST_ALLOC_ROOT);
 501                 ret = PTR_ERR(tmp_root);
 502                 goto out;
 503         }
 504
 505         tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID;
 506         ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
 507         if (ret) {
 508                 test_err("couldn't insert fs root %d", ret);
 509                 goto out;
 510         }
 511         btrfs_put_root(tmp_root);
 512
 513         test_msg("running qgroup tests");
 514         ret = test_no_shared_qgroup(root, sectorsize, nodesize);
 515         if (ret)
 516                 goto out;
 517         ret = test_multiple_refs(root, sectorsize, nodesize);
 518 out:
 519         btrfs_free_dummy_root(root);
 520         btrfs_free_dummy_fs_info(fs_info);
 521         return ret;
 522 }