fs/btrfs/tests/inode-tests.c

   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
  16 static 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
  55 static 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  */
  96 static 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 - 1, 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
 214 static u32 prealloc_only = 0;
 215 static u32 compressed_only = 0;
 216 static u32 vacancy_only = 0;
 217
 218 static 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, 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->disk_bytenr != EXTENT_MAP_HOLE) {
 268                 test_err("expected a hole, got %llu", em->disk_bytenr);
 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, (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->disk_bytenr != EXTENT_MAP_INLINE) {
 287                 test_err("expected an inline, got %llu", em->disk_bytenr);
 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, 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->disk_bytenr != EXTENT_MAP_HOLE) {
 325                 test_err("expected a hole, got %llu", em->disk_bytenr);
 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, 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->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 348                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 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->offset != 0) {
 362                 test_err("wrong offset, want 0, have %llu", em->offset);
 363                 goto out;
 364         }
 365         offset = em->start + em->len;
 366         free_extent_map(em);
 367
 368         /* The next 3 are split extents */
 369         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 370         if (IS_ERR(em)) {
 371                 test_err("got an error when we shouldn't have");
 372                 goto out;
 373         }
 374         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 375                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 376                 goto out;
 377         }
 378         if (em->start != offset || em->len != sectorsize) {
 379                 test_err(
 380                 "unexpected extent start %llu len %u, got start %llu len %llu",
 381                         offset, sectorsize, em->start, em->len);
 382                 goto out;
 383         }
 384         if (em->flags != 0) {
 385                 test_err("unexpected flags set, want 0 have %u", em->flags);
 386                 goto out;
 387         }
 388         if (em->offset != 0) {
 389                 test_err("wrong offset, want 0, have %llu", em->offset);
 390                 goto out;
 391         }
 392         disk_bytenr = extent_map_block_start(em);
 393         orig_start = em->start;
 394         offset = em->start + em->len;
 395         free_extent_map(em);
 396
 397         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 398         if (IS_ERR(em)) {
 399                 test_err("got an error when we shouldn't have");
 400                 goto out;
 401         }
 402         if (em->disk_bytenr != EXTENT_MAP_HOLE) {
 403                 test_err("expected a hole, got %llu", em->disk_bytenr);
 404                 goto out;
 405         }
 406         if (em->start != offset || em->len != sectorsize) {
 407                 test_err(
 408         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 409                         offset, sectorsize, em->start, em->len);
 410                 goto out;
 411         }
 412         if (em->flags != 0) {
 413                 test_err("unexpected flags set, want 0 have %u", em->flags);
 414                 goto out;
 415         }
 416         offset = em->start + em->len;
 417         free_extent_map(em);
 418
 419         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 420         if (IS_ERR(em)) {
 421                 test_err("got an error when we shouldn't have");
 422                 goto out;
 423         }
 424         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 425                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 426                 goto out;
 427         }
 428         if (em->start != offset || em->len != 2 * sectorsize) {
 429                 test_err(
 430         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 431                         offset, 2 * sectorsize, em->start, em->len);
 432                 goto out;
 433         }
 434         if (em->flags != 0) {
 435                 test_err("unexpected flags set, want 0 have %u", em->flags);
 436                 goto out;
 437         }
 438         if (em->start - em->offset != orig_start) {
 439                 test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu",
 440                          em->start, em->offset, orig_start);
 441                 goto out;
 442         }
 443         disk_bytenr += (em->start - orig_start);
 444         if (extent_map_block_start(em) != disk_bytenr) {
 445                 test_err("wrong block start, want %llu, have %llu",
 446                          disk_bytenr, extent_map_block_start(em));
 447                 goto out;
 448         }
 449         offset = em->start + em->len;
 450         free_extent_map(em);
 451
 452         /* Prealloc extent */
 453         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 454         if (IS_ERR(em)) {
 455                 test_err("got an error when we shouldn't have");
 456                 goto out;
 457         }
 458         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 459                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 460                 goto out;
 461         }
 462         if (em->start != offset || em->len != sectorsize) {
 463                 test_err(
 464         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 465                         offset, sectorsize, em->start, em->len);
 466                 goto out;
 467         }
 468         if (em->flags != prealloc_only) {
 469                 test_err("unexpected flags set, want %u have %u",
 470                          prealloc_only, em->flags);
 471                 goto out;
 472         }
 473         if (em->offset != 0) {
 474                 test_err("wrong offset, want 0, have %llu", em->offset);
 475                 goto out;
 476         }
 477         offset = em->start + em->len;
 478         free_extent_map(em);
 479
 480         /* The next 3 are a half written prealloc extent */
 481         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 482         if (IS_ERR(em)) {
 483                 test_err("got an error when we shouldn't have");
 484                 goto out;
 485         }
 486         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 487                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 488                 goto out;
 489         }
 490         if (em->start != offset || em->len != sectorsize) {
 491                 test_err(
 492         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 493                         offset, sectorsize, em->start, em->len);
 494                 goto out;
 495         }
 496         if (em->flags != prealloc_only) {
 497                 test_err("unexpected flags set, want %u have %u",
 498                          prealloc_only, em->flags);
 499                 goto out;
 500         }
 501         if (em->offset != 0) {
 502                 test_err("wrong offset, want 0, have %llu", em->offset);
 503                 goto out;
 504         }
 505         disk_bytenr = extent_map_block_start(em);
 506         orig_start = em->start;
 507         offset = em->start + em->len;
 508         free_extent_map(em);
 509
 510         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 511         if (IS_ERR(em)) {
 512                 test_err("got an error when we shouldn't have");
 513                 goto out;
 514         }
 515         if (em->disk_bytenr >= EXTENT_MAP_HOLE) {
 516                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 517                 goto out;
 518         }
 519         if (em->start != offset || em->len != sectorsize) {
 520                 test_err(
 521         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 522                         offset, sectorsize, em->start, em->len);
 523                 goto out;
 524         }
 525         if (em->flags != 0) {
 526                 test_err("unexpected flags set, want 0 have %u", em->flags);
 527                 goto out;
 528         }
 529         if (em->start - em->offset != orig_start) {
 530                 test_err("unexpected offset, wanted %llu, have %llu",
 531                          em->start - orig_start, em->offset);
 532                 goto out;
 533         }
 534         if (extent_map_block_start(em) != disk_bytenr + em->offset) {
 535                 test_err("unexpected block start, wanted %llu, have %llu",
 536                          disk_bytenr + em->offset, extent_map_block_start(em));
 537                 goto out;
 538         }
 539         offset = em->start + em->len;
 540         free_extent_map(em);
 541
 542         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 543         if (IS_ERR(em)) {
 544                 test_err("got an error when we shouldn't have");
 545                 goto out;
 546         }
 547         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 548                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 549                 goto out;
 550         }
 551         if (em->start != offset || em->len != 2 * sectorsize) {
 552                 test_err(
 553         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 554                         offset, 2 * sectorsize, em->start, em->len);
 555                 goto out;
 556         }
 557         if (em->flags != prealloc_only) {
 558                 test_err("unexpected flags set, want %u have %u",
 559                          prealloc_only, em->flags);
 560                 goto out;
 561         }
 562         if (em->start - em->offset != orig_start) {
 563                 test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu",
 564                          em->start, em->offset, orig_start);
 565                 goto out;
 566         }
 567         if (extent_map_block_start(em) != disk_bytenr + em->offset) {
 568                 test_err("unexpected block start, wanted %llu, have %llu",
 569                          disk_bytenr + em->offset, extent_map_block_start(em));
 570                 goto out;
 571         }
 572         offset = em->start + em->len;
 573         free_extent_map(em);
 574
 575         /* Now for the compressed extent */
 576         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 577         if (IS_ERR(em)) {
 578                 test_err("got an error when we shouldn't have");
 579                 goto out;
 580         }
 581         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 582                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 583                 goto out;
 584         }
 585         if (em->start != offset || em->len != 2 * sectorsize) {
 586                 test_err(
 587         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 588                         offset, 2 * sectorsize, em->start, em->len);
 589                 goto out;
 590         }
 591         if (em->flags != compressed_only) {
 592                 test_err("unexpected flags set, want %u have %u",
 593                          compressed_only, em->flags);
 594                 goto out;
 595         }
 596         if (em->offset != 0) {
 597                 test_err("wrong offset, want 0, have %llu", em->offset);
 598                 goto out;
 599         }
 600         if (extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
 601                 test_err("unexpected compress type, wanted %d, got %d",
 602                          BTRFS_COMPRESS_ZLIB, extent_map_compression(em));
 603                 goto out;
 604         }
 605         offset = em->start + em->len;
 606         free_extent_map(em);
 607
 608         /* Split compressed extent */
 609         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 610         if (IS_ERR(em)) {
 611                 test_err("got an error when we shouldn't have");
 612                 goto out;
 613         }
 614         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 615                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 616                 goto out;
 617         }
 618         if (em->start != offset || em->len != sectorsize) {
 619                 test_err(
 620         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 621                         offset, sectorsize, em->start, em->len);
 622                 goto out;
 623         }
 624         if (em->flags != compressed_only) {
 625                 test_err("unexpected flags set, want %u have %u",
 626                          compressed_only, em->flags);
 627                 goto out;
 628         }
 629         if (em->offset != 0) {
 630                 test_err("wrong offset, want 0, have %llu", em->offset);
 631                 goto out;
 632         }
 633         if (extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
 634                 test_err("unexpected compress type, wanted %d, got %d",
 635                          BTRFS_COMPRESS_ZLIB, extent_map_compression(em));
 636                 goto out;
 637         }
 638         disk_bytenr = extent_map_block_start(em);
 639         orig_start = em->start;
 640         offset = em->start + em->len;
 641         free_extent_map(em);
 642
 643         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 644         if (IS_ERR(em)) {
 645                 test_err("got an error when we shouldn't have");
 646                 goto out;
 647         }
 648         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 649                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 650                 goto out;
 651         }
 652         if (em->start != offset || em->len != sectorsize) {
 653                 test_err(
 654         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 655                         offset, sectorsize, em->start, em->len);
 656                 goto out;
 657         }
 658         if (em->flags != 0) {
 659                 test_err("unexpected flags set, want 0 have %u", em->flags);
 660                 goto out;
 661         }
 662         if (em->offset != 0) {
 663                 test_err("wrong offset, want 0, have %llu", em->offset);
 664                 goto out;
 665         }
 666         offset = em->start + em->len;
 667         free_extent_map(em);
 668
 669         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 670         if (IS_ERR(em)) {
 671                 test_err("got an error when we shouldn't have");
 672                 goto out;
 673         }
 674         if (extent_map_block_start(em) != disk_bytenr) {
 675                 test_err("block start does not match, want %llu got %llu",
 676                          disk_bytenr, extent_map_block_start(em));
 677                 goto out;
 678         }
 679         if (em->start != offset || em->len != 2 * sectorsize) {
 680                 test_err(
 681         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 682                         offset, 2 * sectorsize, em->start, em->len);
 683                 goto out;
 684         }
 685         if (em->flags != compressed_only) {
 686                 test_err("unexpected flags set, want %u have %u",
 687                          compressed_only, em->flags);
 688                 goto out;
 689         }
 690         if (em->start - em->offset != orig_start) {
 691                 test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu",
 692                          em->start, em->offset, orig_start);
 693                 goto out;
 694         }
 695         if (extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
 696                 test_err("unexpected compress type, wanted %d, got %d",
 697                          BTRFS_COMPRESS_ZLIB, extent_map_compression(em));
 698                 goto out;
 699         }
 700         offset = em->start + em->len;
 701         free_extent_map(em);
 702
 703         /* A hole between regular extents but no hole extent */
 704         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset + 6, sectorsize);
 705         if (IS_ERR(em)) {
 706                 test_err("got an error when we shouldn't have");
 707                 goto out;
 708         }
 709         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 710                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 711                 goto out;
 712         }
 713         if (em->start != offset || em->len != sectorsize) {
 714                 test_err(
 715         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 716                         offset, sectorsize, em->start, em->len);
 717                 goto out;
 718         }
 719         if (em->flags != 0) {
 720                 test_err("unexpected flags set, want 0 have %u", em->flags);
 721                 goto out;
 722         }
 723         if (em->offset != 0) {
 724                 test_err("wrong offset, want 0, have %llu", em->offset);
 725                 goto out;
 726         }
 727         offset = em->start + em->len;
 728         free_extent_map(em);
 729
 730         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, SZ_4M);
 731         if (IS_ERR(em)) {
 732                 test_err("got an error when we shouldn't have");
 733                 goto out;
 734         }
 735         if (em->disk_bytenr != EXTENT_MAP_HOLE) {
 736                 test_err("expected a hole extent, got %llu", em->disk_bytenr);
 737                 goto out;
 738         }
 739         /*
 740          * Currently we just return a length that we requested rather than the
 741          * length of the actual hole, if this changes we'll have to change this
 742          * test.
 743          */
 744         if (em->start != offset || em->len != 3 * sectorsize) {
 745                 test_err(
 746         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 747                         offset, 3 * sectorsize, em->start, em->len);
 748                 goto out;
 749         }
 750         if (em->flags != vacancy_only) {
 751                 test_err("unexpected flags set, want %u have %u",
 752                          vacancy_only, em->flags);
 753                 goto out;
 754         }
 755         if (em->offset != 0) {
 756                 test_err("wrong offset, want 0, have %llu", em->offset);
 757                 goto out;
 758         }
 759         offset = em->start + em->len;
 760         free_extent_map(em);
 761
 762         em = btrfs_get_extent(BTRFS_I(inode), NULL, offset, sectorsize);
 763         if (IS_ERR(em)) {
 764                 test_err("got an error when we shouldn't have");
 765                 goto out;
 766         }
 767         if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
 768                 test_err("expected a real extent, got %llu", em->disk_bytenr);
 769                 goto out;
 770         }
 771         if (em->start != offset || em->len != sectorsize) {
 772                 test_err(
 773         "unexpected extent wanted start %llu len %u, got start %llu len %llu",
 774                         offset, sectorsize, em->start, em->len);
 775                 goto out;
 776         }
 777         if (em->flags != 0) {
 778                 test_err("unexpected flags set, want 0 have %u", em->flags);
 779                 goto out;
 780         }
 781         if (em->offset != 0) {
 782                 test_err("wrong orig offset, want 0, have %llu", em->offset);
 783                 goto out;
 784         }
 785         ret = 0;
 786 out:
 787         if (!IS_ERR(em))
 788                 free_extent_map(em);
 789         iput(inode);
 790         btrfs_free_dummy_root(root);
 791         btrfs_free_dummy_fs_info(fs_info);
 792         return ret;
 793 }
 794
 795 static int test_hole_first(u32 sectorsize, u32 nodesize)
 796 {
 797         struct btrfs_fs_info *fs_info = NULL;
 798         struct inode *inode = NULL;
 799         struct btrfs_root *root = NULL;
 800         struct extent_map *em = NULL;
 801         int ret = -ENOMEM;
 802
 803         test_msg("running hole first btrfs_get_extent test");
 804
 805         inode = btrfs_new_test_inode();
 806         if (!inode) {
 807                 test_std_err(TEST_ALLOC_INODE);
 808                 return ret;
 809         }
 810
 811         fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 812         if (!fs_info) {
 813                 test_std_err(TEST_ALLOC_FS_INFO);
 814                 goto out;
 815         }
 816
 817         root = btrfs_alloc_dummy_root(fs_info);
 818         if (IS_ERR(root)) {
 819                 test_std_err(TEST_ALLOC_ROOT);
 820                 goto out;
 821         }
 822
 823         root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
 824         if (!root->node) {
 825                 test_std_err(TEST_ALLOC_ROOT);
 826                 goto out;
 827         }
 828
 829         btrfs_set_header_nritems(root->node, 0);
 830         btrfs_set_header_level(root->node, 0);
 831         BTRFS_I(inode)->root = root;
 832         ret = -EINVAL;
 833
 834         /*
 835          * Need a blank inode item here just so we don't confuse
 836          * btrfs_get_extent.
 837          */
 838         insert_inode_item_key(root);
 839         insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize,
 840                       sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1);
 841         em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 2 * sectorsize);
 842         if (IS_ERR(em)) {
 843                 test_err("got an error when we shouldn't have");
 844                 goto out;
 845         }
 846         if (em->disk_bytenr != EXTENT_MAP_HOLE) {
 847                 test_err("expected a hole, got %llu", em->disk_bytenr);
 848                 goto out;
 849         }
 850         if (em->start != 0 || em->len != sectorsize) {
 851                 test_err(
 852         "unexpected extent wanted start 0 len %u, got start %llu len %llu",
 853                         sectorsize, em->start, em->len);
 854                 goto out;
 855         }
 856         if (em->flags != vacancy_only) {
 857                 test_err("wrong flags, wanted %u, have %u", vacancy_only,
 858                          em->flags);
 859                 goto out;
 860         }
 861         free_extent_map(em);
 862
 863         em = btrfs_get_extent(BTRFS_I(inode), NULL, sectorsize, 2 * sectorsize);
 864         if (IS_ERR(em)) {
 865                 test_err("got an error when we shouldn't have");
 866                 goto out;
 867         }
 868         if (extent_map_block_start(em) != sectorsize) {
 869                 test_err("expected a real extent, got %llu", extent_map_block_start(em));
 870                 goto out;
 871         }
 872         if (em->start != sectorsize || em->len != sectorsize) {
 873                 test_err(
 874         "unexpected extent wanted start %u len %u, got start %llu len %llu",
 875                         sectorsize, sectorsize, em->start, em->len);
 876                 goto out;
 877         }
 878         if (em->flags != 0) {
 879                 test_err("unexpected flags set, wanted 0 got %u",
 880                          em->flags);
 881                 goto out;
 882         }
 883         ret = 0;
 884 out:
 885         if (!IS_ERR(em))
 886                 free_extent_map(em);
 887         iput(inode);
 888         btrfs_free_dummy_root(root);
 889         btrfs_free_dummy_fs_info(fs_info);
 890         return ret;
 891 }
 892
 893 static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 894 {
 895         struct btrfs_fs_info *fs_info = NULL;
 896         struct inode *inode = NULL;
 897         struct btrfs_root *root = NULL;
 898         int ret = -ENOMEM;
 899
 900         test_msg("running outstanding_extents tests");
 901
 902         inode = btrfs_new_test_inode();
 903         if (!inode) {
 904                 test_std_err(TEST_ALLOC_INODE);
 905                 return ret;
 906         }
 907
 908         fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 909         if (!fs_info) {
 910                 test_std_err(TEST_ALLOC_FS_INFO);
 911                 goto out;
 912         }
 913
 914         root = btrfs_alloc_dummy_root(fs_info);
 915         if (IS_ERR(root)) {
 916                 test_std_err(TEST_ALLOC_ROOT);
 917                 goto out;
 918         }
 919
 920         BTRFS_I(inode)->root = root;
 921
 922         /* [BTRFS_MAX_EXTENT_SIZE] */
 923         ret = btrfs_set_extent_delalloc(BTRFS_I(inode), 0,
 924                                         BTRFS_MAX_EXTENT_SIZE - 1, 0, NULL);
 925         if (ret) {
 926                 test_err("btrfs_set_extent_delalloc returned %d", ret);
 927                 goto out;
 928         }
 929         if (BTRFS_I(inode)->outstanding_extents != 1) {
 930                 ret = -EINVAL;
 931                 test_err("miscount, wanted 1, got %u",
 932                          BTRFS_I(inode)->outstanding_extents);
 933                 goto out;
 934         }
 935
 936         /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
 937         ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE,
 938                                         BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
 939                                         0, NULL);
 940         if (ret) {
 941                 test_err("btrfs_set_extent_delalloc returned %d", ret);
 942                 goto out;
 943         }
 944         if (BTRFS_I(inode)->outstanding_extents != 2) {
 945                 ret = -EINVAL;
 946                 test_err("miscount, wanted 2, got %u",
 947                          BTRFS_I(inode)->outstanding_extents);
 948                 goto out;
 949         }
 950
 951         /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
 952         ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
 953                                BTRFS_MAX_EXTENT_SIZE >> 1,
 954                                (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
 955                                EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
 956                                EXTENT_UPTODATE, NULL);
 957         if (ret) {
 958                 test_err("clear_extent_bit returned %d", ret);
 959                 goto out;
 960         }
 961         if (BTRFS_I(inode)->outstanding_extents != 2) {
 962                 ret = -EINVAL;
 963                 test_err("miscount, wanted 2, got %u",
 964                          BTRFS_I(inode)->outstanding_extents);
 965                 goto out;
 966         }
 967
 968         /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
 969         ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE >> 1,
 970                                         (BTRFS_MAX_EXTENT_SIZE >> 1)
 971                                         + sectorsize - 1,
 972                                         0, NULL);
 973         if (ret) {
 974                 test_err("btrfs_set_extent_delalloc returned %d", ret);
 975                 goto out;
 976         }
 977         if (BTRFS_I(inode)->outstanding_extents != 2) {
 978                 ret = -EINVAL;
 979                 test_err("miscount, wanted 2, got %u",
 980                          BTRFS_I(inode)->outstanding_extents);
 981                 goto out;
 982         }
 983
 984         /*
 985          * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
 986          */
 987         ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
 988                         BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
 989                         (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
 990                         0, NULL);
 991         if (ret) {
 992                 test_err("btrfs_set_extent_delalloc returned %d", ret);
 993                 goto out;
 994         }
 995         if (BTRFS_I(inode)->outstanding_extents != 4) {
 996                 ret = -EINVAL;
 997                 test_err("miscount, wanted 4, got %u",
 998                          BTRFS_I(inode)->outstanding_extents);
 999                 goto out;
1000         }
1001
1002         /*
1003         * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1004         */
1005         ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1006                         BTRFS_MAX_EXTENT_SIZE + sectorsize,
1007                         BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1008         if (ret) {
1009                 test_err("btrfs_set_extent_delalloc returned %d", ret);
1010                 goto out;
1011         }
1012         if (BTRFS_I(inode)->outstanding_extents != 3) {
1013                 ret = -EINVAL;
1014                 test_err("miscount, wanted 3, got %u",
1015                          BTRFS_I(inode)->outstanding_extents);
1016                 goto out;
1017         }
1018
1019         /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1020         ret = clear_extent_bit(&BTRFS_I(inode)->io_tree,
1021                                BTRFS_MAX_EXTENT_SIZE + sectorsize,
1022                                BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1023                                EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1024                                EXTENT_UPTODATE, NULL);
1025         if (ret) {
1026                 test_err("clear_extent_bit returned %d", ret);
1027                 goto out;
1028         }
1029         if (BTRFS_I(inode)->outstanding_extents != 4) {
1030                 ret = -EINVAL;
1031                 test_err("miscount, wanted 4, got %u",
1032                          BTRFS_I(inode)->outstanding_extents);
1033                 goto out;
1034         }
1035
1036         /*
1037          * Refill the hole again just for good measure, because I thought it
1038          * might fail and I'd rather satisfy my paranoia at this point.
1039          */
1040         ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1041                         BTRFS_MAX_EXTENT_SIZE + sectorsize,
1042                         BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL);
1043         if (ret) {
1044                 test_err("btrfs_set_extent_delalloc returned %d", ret);
1045                 goto out;
1046         }
1047         if (BTRFS_I(inode)->outstanding_extents != 3) {
1048                 ret = -EINVAL;
1049                 test_err("miscount, wanted 3, got %u",
1050                          BTRFS_I(inode)->outstanding_extents);
1051                 goto out;
1052         }
1053
1054         /* Empty */
1055         ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1056                                EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1057                                EXTENT_UPTODATE, NULL);
1058         if (ret) {
1059                 test_err("clear_extent_bit returned %d", ret);
1060                 goto out;
1061         }
1062         if (BTRFS_I(inode)->outstanding_extents) {
1063                 ret = -EINVAL;
1064                 test_err("miscount, wanted 0, got %u",
1065                          BTRFS_I(inode)->outstanding_extents);
1066                 goto out;
1067         }
1068         ret = 0;
1069 out:
1070         if (ret)
1071                 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
1072                                  EXTENT_DELALLOC | EXTENT_DELALLOC_NEW |
1073                                  EXTENT_UPTODATE, NULL);
1074         iput(inode);
1075         btrfs_free_dummy_root(root);
1076         btrfs_free_dummy_fs_info(fs_info);
1077         return ret;
1078 }
1079
1080 int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1081 {
1082         int ret;
1083
1084         test_msg("running inode tests");
1085
1086         compressed_only |= EXTENT_FLAG_COMPRESS_ZLIB;
1087         prealloc_only |= EXTENT_FLAG_PREALLOC;
1088
1089         ret = test_btrfs_get_extent(sectorsize, nodesize);
1090         if (ret)
1091                 return ret;
1092         ret = test_hole_first(sectorsize, nodesize);
1093         if (ret)
1094                 return ret;
1095         return test_extent_accounting(sectorsize, nodesize);
1096 }