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 15 static void insert_extent(struct btrfs_root *root, u64 start, u64 len, 16 u64 ram_bytes, u64 offset, u64 disk_bytenr, 17 u64 disk_len, u32 type, u8 compression, int slot) 18 { 19 struct btrfs_path path; 20 struct btrfs_file_extent_item *fi; 21 struct extent_buffer *leaf = root->node; 22 struct btrfs_key key; 23 u32 value_len = sizeof(struct btrfs_file_extent_item); 24 25 if (type == BTRFS_FILE_EXTENT_INLINE) 26 value_len += len; 27 memset(&path, 0, sizeof(path)); 28 29 path.nodes[0] = leaf; 30 path.slots[0] = slot; 31 32 key.objectid = BTRFS_FIRST_FREE_OBJECTID; 33 key.type = BTRFS_EXTENT_DATA_KEY; 34 key.offset = start; 35 36 setup_items_for_insert(root, &path, &key, &value_len, value_len, 37 value_len + sizeof(struct btrfs_item), 1); 38 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); 39 btrfs_set_file_extent_generation(leaf, fi, 1); 40 btrfs_set_file_extent_type(leaf, fi, type); 41 btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr); 42 btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len); 43 btrfs_set_file_extent_offset(leaf, fi, offset); 44 btrfs_set_file_extent_num_bytes(leaf, fi, len); 45 btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes); 46 btrfs_set_file_extent_compression(leaf, fi, compression); 47 btrfs_set_file_extent_encryption(leaf, fi, 0); 48 btrfs_set_file_extent_other_encoding(leaf, fi, 0); 49 } 50 51 static void insert_inode_item_key(struct btrfs_root *root) 52 { 53 struct btrfs_path path; 54 struct extent_buffer *leaf = root->node; 55 struct btrfs_key key; 56 u32 value_len = 0; 57 58 memset(&path, 0, sizeof(path)); 59 60 path.nodes[0] = leaf; 61 path.slots[0] = 0; 62 63 key.objectid = BTRFS_INODE_ITEM_KEY; 64 key.type = BTRFS_INODE_ITEM_KEY; 65 key.offset = 0; 66 67 setup_items_for_insert(root, &path, &key, &value_len, value_len, 68 value_len + sizeof(struct btrfs_item), 1); 69 } 70 71 /* 72 * Build the most complicated map of extents the earth has ever seen. We want 73 * this so we can test all of the corner cases of btrfs_get_extent. Here is a 74 * diagram of how the extents will look though this may not be possible we still 75 * want to make sure everything acts normally (the last number is not inclusive) 76 * 77 * [0 - 5][5 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291] 78 * [hole ][inline][hole but no extent][ hole ][ regular ][regular1 split] 79 * 80 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ] 81 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written] 82 * 83 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635] 84 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1] 85 * 86 * [69635-73731][ 73731 - 86019 ][86019-90115] 87 * [ regular ][ hole but no extent][ regular ] 88 */ 89 static void setup_file_extents(struct btrfs_root *root, u32 sectorsize) 90 { 91 int slot = 0; 92 u64 disk_bytenr = SZ_1M; 93 u64 offset = 0; 94 95 /* First we want a hole */ 96 insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0, 97 slot); 98 slot++; 99 offset += 5; 100 101 /* 102 * Now we want an inline extent, I don't think this is possible but hey 103 * why not? Also keep in mind if we have an inline extent it counts as 104 * the whole first page. If we were to expand it we would have to cow 105 * and we wouldn't have an inline extent anymore. 106 */ 107 insert_extent(root, offset, 1, 1, 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, 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 unsigned long prealloc_only = 0; 215 static unsigned long compressed_only = 0; 216 static unsigned long 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 inode->i_mode = S_IFREG; 238 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY; 239 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID; 240 BTRFS_I(inode)->location.offset = 0; 241 242 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 243 if (!fs_info) { 244 test_std_err(TEST_ALLOC_FS_INFO); 245 goto out; 246 } 247 248 root = btrfs_alloc_dummy_root(fs_info); 249 if (IS_ERR(root)) { 250 test_std_err(TEST_ALLOC_ROOT); 251 goto out; 252 } 253 254 root->node = alloc_dummy_extent_buffer(fs_info, nodesize); 255 if (!root->node) { 256 test_std_err(TEST_ALLOC_ROOT); 257 goto out; 258 } 259 260 btrfs_set_header_nritems(root->node, 0); 261 btrfs_set_header_level(root->node, 0); 262 ret = -EINVAL; 263 264 /* First with no extents */ 265 BTRFS_I(inode)->root = root; 266 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, sectorsize, 0); 267 if (IS_ERR(em)) { 268 em = NULL; 269 test_err("got an error when we shouldn't have"); 270 goto out; 271 } 272 if (em->block_start != EXTENT_MAP_HOLE) { 273 test_err("expected a hole, got %llu", em->block_start); 274 goto out; 275 } 276 free_extent_map(em); 277 btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0); 278 279 /* 280 * All of the magic numbers are based on the mapping setup in 281 * setup_file_extents, so if you change anything there you need to 282 * update the comment and update the expected values below. 283 */ 284 setup_file_extents(root, sectorsize); 285 286 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, (u64)-1, 0); 287 if (IS_ERR(em)) { 288 test_err("got an error when we shouldn't have"); 289 goto out; 290 } 291 if (em->block_start != EXTENT_MAP_HOLE) { 292 test_err("expected a hole, got %llu", em->block_start); 293 goto out; 294 } 295 if (em->start != 0 || em->len != 5) { 296 test_err( 297 "unexpected extent wanted start 0 len 5, got start %llu len %llu", 298 em->start, em->len); 299 goto out; 300 } 301 if (em->flags != 0) { 302 test_err("unexpected flags set, want 0 have %lu", em->flags); 303 goto out; 304 } 305 offset = em->start + em->len; 306 free_extent_map(em); 307 308 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 309 if (IS_ERR(em)) { 310 test_err("got an error when we shouldn't have"); 311 goto out; 312 } 313 if (em->block_start != EXTENT_MAP_INLINE) { 314 test_err("expected an inline, got %llu", em->block_start); 315 goto out; 316 } 317 318 if (em->start != offset || em->len != (sectorsize - 5)) { 319 test_err( 320 "unexpected extent wanted start %llu len 1, got start %llu len %llu", 321 offset, em->start, em->len); 322 goto out; 323 } 324 if (em->flags != 0) { 325 test_err("unexpected flags set, want 0 have %lu", em->flags); 326 goto out; 327 } 328 /* 329 * We don't test anything else for inline since it doesn't get set 330 * unless we have a page for it to write into. Maybe we should change 331 * this? 332 */ 333 offset = em->start + em->len; 334 free_extent_map(em); 335 336 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 337 if (IS_ERR(em)) { 338 test_err("got an error when we shouldn't have"); 339 goto out; 340 } 341 if (em->block_start != EXTENT_MAP_HOLE) { 342 test_err("expected a hole, got %llu", em->block_start); 343 goto out; 344 } 345 if (em->start != offset || em->len != 4) { 346 test_err( 347 "unexpected extent wanted start %llu len 4, got start %llu len %llu", 348 offset, em->start, em->len); 349 goto out; 350 } 351 if (em->flags != 0) { 352 test_err("unexpected flags set, want 0 have %lu", em->flags); 353 goto out; 354 } 355 offset = em->start + em->len; 356 free_extent_map(em); 357 358 /* Regular extent */ 359 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 360 if (IS_ERR(em)) { 361 test_err("got an error when we shouldn't have"); 362 goto out; 363 } 364 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 365 test_err("expected a real extent, got %llu", em->block_start); 366 goto out; 367 } 368 if (em->start != offset || em->len != sectorsize - 1) { 369 test_err( 370 "unexpected extent wanted start %llu len 4095, got start %llu len %llu", 371 offset, em->start, em->len); 372 goto out; 373 } 374 if (em->flags != 0) { 375 test_err("unexpected flags set, want 0 have %lu", em->flags); 376 goto out; 377 } 378 if (em->orig_start != em->start) { 379 test_err("wrong orig offset, want %llu, have %llu", em->start, 380 em->orig_start); 381 goto out; 382 } 383 offset = em->start + em->len; 384 free_extent_map(em); 385 386 /* The next 3 are split extents */ 387 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 388 if (IS_ERR(em)) { 389 test_err("got an error when we shouldn't have"); 390 goto out; 391 } 392 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 393 test_err("expected a real extent, got %llu", em->block_start); 394 goto out; 395 } 396 if (em->start != offset || em->len != sectorsize) { 397 test_err( 398 "unexpected extent start %llu len %u, got start %llu len %llu", 399 offset, sectorsize, em->start, em->len); 400 goto out; 401 } 402 if (em->flags != 0) { 403 test_err("unexpected flags set, want 0 have %lu", em->flags); 404 goto out; 405 } 406 if (em->orig_start != em->start) { 407 test_err("wrong orig offset, want %llu, have %llu", em->start, 408 em->orig_start); 409 goto out; 410 } 411 disk_bytenr = em->block_start; 412 orig_start = em->start; 413 offset = em->start + em->len; 414 free_extent_map(em); 415 416 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 417 if (IS_ERR(em)) { 418 test_err("got an error when we shouldn't have"); 419 goto out; 420 } 421 if (em->block_start != EXTENT_MAP_HOLE) { 422 test_err("expected a hole, got %llu", em->block_start); 423 goto out; 424 } 425 if (em->start != offset || em->len != sectorsize) { 426 test_err( 427 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 428 offset, sectorsize, em->start, em->len); 429 goto out; 430 } 431 if (em->flags != 0) { 432 test_err("unexpected flags set, want 0 have %lu", em->flags); 433 goto out; 434 } 435 offset = em->start + em->len; 436 free_extent_map(em); 437 438 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 439 if (IS_ERR(em)) { 440 test_err("got an error when we shouldn't have"); 441 goto out; 442 } 443 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 444 test_err("expected a real extent, got %llu", em->block_start); 445 goto out; 446 } 447 if (em->start != offset || em->len != 2 * sectorsize) { 448 test_err( 449 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 450 offset, 2 * sectorsize, em->start, em->len); 451 goto out; 452 } 453 if (em->flags != 0) { 454 test_err("unexpected flags set, want 0 have %lu", em->flags); 455 goto out; 456 } 457 if (em->orig_start != orig_start) { 458 test_err("wrong orig offset, want %llu, have %llu", 459 orig_start, em->orig_start); 460 goto out; 461 } 462 disk_bytenr += (em->start - orig_start); 463 if (em->block_start != disk_bytenr) { 464 test_err("wrong block start, want %llu, have %llu", 465 disk_bytenr, em->block_start); 466 goto out; 467 } 468 offset = em->start + em->len; 469 free_extent_map(em); 470 471 /* Prealloc extent */ 472 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 473 if (IS_ERR(em)) { 474 test_err("got an error when we shouldn't have"); 475 goto out; 476 } 477 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 478 test_err("expected a real extent, got %llu", em->block_start); 479 goto out; 480 } 481 if (em->start != offset || em->len != sectorsize) { 482 test_err( 483 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 484 offset, sectorsize, em->start, em->len); 485 goto out; 486 } 487 if (em->flags != prealloc_only) { 488 test_err("unexpected flags set, want %lu have %lu", 489 prealloc_only, em->flags); 490 goto out; 491 } 492 if (em->orig_start != em->start) { 493 test_err("wrong orig offset, want %llu, have %llu", em->start, 494 em->orig_start); 495 goto out; 496 } 497 offset = em->start + em->len; 498 free_extent_map(em); 499 500 /* The next 3 are a half written prealloc extent */ 501 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 502 if (IS_ERR(em)) { 503 test_err("got an error when we shouldn't have"); 504 goto out; 505 } 506 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 507 test_err("expected a real extent, got %llu", em->block_start); 508 goto out; 509 } 510 if (em->start != offset || em->len != sectorsize) { 511 test_err( 512 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 513 offset, sectorsize, em->start, em->len); 514 goto out; 515 } 516 if (em->flags != prealloc_only) { 517 test_err("unexpected flags set, want %lu have %lu", 518 prealloc_only, em->flags); 519 goto out; 520 } 521 if (em->orig_start != em->start) { 522 test_err("wrong orig offset, want %llu, have %llu", em->start, 523 em->orig_start); 524 goto out; 525 } 526 disk_bytenr = em->block_start; 527 orig_start = em->start; 528 offset = em->start + em->len; 529 free_extent_map(em); 530 531 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 532 if (IS_ERR(em)) { 533 test_err("got an error when we shouldn't have"); 534 goto out; 535 } 536 if (em->block_start >= EXTENT_MAP_HOLE) { 537 test_err("expected a real extent, got %llu", em->block_start); 538 goto out; 539 } 540 if (em->start != offset || em->len != sectorsize) { 541 test_err( 542 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 543 offset, sectorsize, em->start, em->len); 544 goto out; 545 } 546 if (em->flags != 0) { 547 test_err("unexpected flags set, want 0 have %lu", em->flags); 548 goto out; 549 } 550 if (em->orig_start != orig_start) { 551 test_err("unexpected orig offset, wanted %llu, have %llu", 552 orig_start, em->orig_start); 553 goto out; 554 } 555 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) { 556 test_err("unexpected block start, wanted %llu, have %llu", 557 disk_bytenr + (em->start - em->orig_start), 558 em->block_start); 559 goto out; 560 } 561 offset = em->start + em->len; 562 free_extent_map(em); 563 564 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 565 if (IS_ERR(em)) { 566 test_err("got an error when we shouldn't have"); 567 goto out; 568 } 569 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 570 test_err("expected a real extent, got %llu", em->block_start); 571 goto out; 572 } 573 if (em->start != offset || em->len != 2 * sectorsize) { 574 test_err( 575 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 576 offset, 2 * sectorsize, em->start, em->len); 577 goto out; 578 } 579 if (em->flags != prealloc_only) { 580 test_err("unexpected flags set, want %lu have %lu", 581 prealloc_only, em->flags); 582 goto out; 583 } 584 if (em->orig_start != orig_start) { 585 test_err("wrong orig offset, want %llu, have %llu", orig_start, 586 em->orig_start); 587 goto out; 588 } 589 if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) { 590 test_err("unexpected block start, wanted %llu, have %llu", 591 disk_bytenr + (em->start - em->orig_start), 592 em->block_start); 593 goto out; 594 } 595 offset = em->start + em->len; 596 free_extent_map(em); 597 598 /* Now for the compressed extent */ 599 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 600 if (IS_ERR(em)) { 601 test_err("got an error when we shouldn't have"); 602 goto out; 603 } 604 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 605 test_err("expected a real extent, got %llu", em->block_start); 606 goto out; 607 } 608 if (em->start != offset || em->len != 2 * sectorsize) { 609 test_err( 610 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 611 offset, 2 * sectorsize, em->start, em->len); 612 goto out; 613 } 614 if (em->flags != compressed_only) { 615 test_err("unexpected flags set, want %lu have %lu", 616 compressed_only, em->flags); 617 goto out; 618 } 619 if (em->orig_start != em->start) { 620 test_err("wrong orig offset, want %llu, have %llu", 621 em->start, em->orig_start); 622 goto out; 623 } 624 if (em->compress_type != BTRFS_COMPRESS_ZLIB) { 625 test_err("unexpected compress type, wanted %d, got %d", 626 BTRFS_COMPRESS_ZLIB, em->compress_type); 627 goto out; 628 } 629 offset = em->start + em->len; 630 free_extent_map(em); 631 632 /* Split compressed extent */ 633 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 634 if (IS_ERR(em)) { 635 test_err("got an error when we shouldn't have"); 636 goto out; 637 } 638 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 639 test_err("expected a real extent, got %llu", em->block_start); 640 goto out; 641 } 642 if (em->start != offset || em->len != sectorsize) { 643 test_err( 644 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 645 offset, sectorsize, em->start, em->len); 646 goto out; 647 } 648 if (em->flags != compressed_only) { 649 test_err("unexpected flags set, want %lu have %lu", 650 compressed_only, em->flags); 651 goto out; 652 } 653 if (em->orig_start != em->start) { 654 test_err("wrong orig offset, want %llu, have %llu", 655 em->start, em->orig_start); 656 goto out; 657 } 658 if (em->compress_type != BTRFS_COMPRESS_ZLIB) { 659 test_err("unexpected compress type, wanted %d, got %d", 660 BTRFS_COMPRESS_ZLIB, em->compress_type); 661 goto out; 662 } 663 disk_bytenr = em->block_start; 664 orig_start = em->start; 665 offset = em->start + em->len; 666 free_extent_map(em); 667 668 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 669 if (IS_ERR(em)) { 670 test_err("got an error when we shouldn't have"); 671 goto out; 672 } 673 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 674 test_err("expected a real extent, got %llu", em->block_start); 675 goto out; 676 } 677 if (em->start != offset || em->len != sectorsize) { 678 test_err( 679 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 680 offset, sectorsize, em->start, em->len); 681 goto out; 682 } 683 if (em->flags != 0) { 684 test_err("unexpected flags set, want 0 have %lu", em->flags); 685 goto out; 686 } 687 if (em->orig_start != em->start) { 688 test_err("wrong orig offset, want %llu, have %llu", em->start, 689 em->orig_start); 690 goto out; 691 } 692 offset = em->start + em->len; 693 free_extent_map(em); 694 695 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 696 if (IS_ERR(em)) { 697 test_err("got an error when we shouldn't have"); 698 goto out; 699 } 700 if (em->block_start != disk_bytenr) { 701 test_err("block start does not match, want %llu got %llu", 702 disk_bytenr, em->block_start); 703 goto out; 704 } 705 if (em->start != offset || em->len != 2 * sectorsize) { 706 test_err( 707 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 708 offset, 2 * sectorsize, em->start, em->len); 709 goto out; 710 } 711 if (em->flags != compressed_only) { 712 test_err("unexpected flags set, want %lu have %lu", 713 compressed_only, em->flags); 714 goto out; 715 } 716 if (em->orig_start != orig_start) { 717 test_err("wrong orig offset, want %llu, have %llu", 718 em->start, orig_start); 719 goto out; 720 } 721 if (em->compress_type != BTRFS_COMPRESS_ZLIB) { 722 test_err("unexpected compress type, wanted %d, got %d", 723 BTRFS_COMPRESS_ZLIB, em->compress_type); 724 goto out; 725 } 726 offset = em->start + em->len; 727 free_extent_map(em); 728 729 /* A hole between regular extents but no hole extent */ 730 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset + 6, 731 sectorsize, 0); 732 if (IS_ERR(em)) { 733 test_err("got an error when we shouldn't have"); 734 goto out; 735 } 736 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 737 test_err("expected a real extent, got %llu", em->block_start); 738 goto out; 739 } 740 if (em->start != offset || em->len != sectorsize) { 741 test_err( 742 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 743 offset, sectorsize, em->start, em->len); 744 goto out; 745 } 746 if (em->flags != 0) { 747 test_err("unexpected flags set, want 0 have %lu", em->flags); 748 goto out; 749 } 750 if (em->orig_start != em->start) { 751 test_err("wrong orig offset, want %llu, have %llu", em->start, 752 em->orig_start); 753 goto out; 754 } 755 offset = em->start + em->len; 756 free_extent_map(em); 757 758 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M, 0); 759 if (IS_ERR(em)) { 760 test_err("got an error when we shouldn't have"); 761 goto out; 762 } 763 if (em->block_start != EXTENT_MAP_HOLE) { 764 test_err("expected a hole extent, got %llu", em->block_start); 765 goto out; 766 } 767 /* 768 * Currently we just return a length that we requested rather than the 769 * length of the actual hole, if this changes we'll have to change this 770 * test. 771 */ 772 if (em->start != offset || em->len != 3 * sectorsize) { 773 test_err( 774 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 775 offset, 3 * sectorsize, em->start, em->len); 776 goto out; 777 } 778 if (em->flags != vacancy_only) { 779 test_err("unexpected flags set, want %lu have %lu", 780 vacancy_only, em->flags); 781 goto out; 782 } 783 if (em->orig_start != em->start) { 784 test_err("wrong orig offset, want %llu, have %llu", em->start, 785 em->orig_start); 786 goto out; 787 } 788 offset = em->start + em->len; 789 free_extent_map(em); 790 791 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize, 0); 792 if (IS_ERR(em)) { 793 test_err("got an error when we shouldn't have"); 794 goto out; 795 } 796 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 797 test_err("expected a real extent, got %llu", em->block_start); 798 goto out; 799 } 800 if (em->start != offset || em->len != sectorsize) { 801 test_err( 802 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 803 offset, sectorsize, em->start, em->len); 804 goto out; 805 } 806 if (em->flags != 0) { 807 test_err("unexpected flags set, want 0 have %lu", em->flags); 808 goto out; 809 } 810 if (em->orig_start != em->start) { 811 test_err("wrong orig offset, want %llu, have %llu", em->start, 812 em->orig_start); 813 goto out; 814 } 815 ret = 0; 816 out: 817 if (!IS_ERR(em)) 818 free_extent_map(em); 819 iput(inode); 820 btrfs_free_dummy_root(root); 821 btrfs_free_dummy_fs_info(fs_info); 822 return ret; 823 } 824 825 static int test_hole_first(u32 sectorsize, u32 nodesize) 826 { 827 struct btrfs_fs_info *fs_info = NULL; 828 struct inode *inode = NULL; 829 struct btrfs_root *root = NULL; 830 struct extent_map *em = NULL; 831 int ret = -ENOMEM; 832 833 test_msg("running hole first btrfs_get_extent test"); 834 835 inode = btrfs_new_test_inode(); 836 if (!inode) { 837 test_std_err(TEST_ALLOC_INODE); 838 return ret; 839 } 840 841 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY; 842 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID; 843 BTRFS_I(inode)->location.offset = 0; 844 845 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 846 if (!fs_info) { 847 test_std_err(TEST_ALLOC_FS_INFO); 848 goto out; 849 } 850 851 root = btrfs_alloc_dummy_root(fs_info); 852 if (IS_ERR(root)) { 853 test_std_err(TEST_ALLOC_ROOT); 854 goto out; 855 } 856 857 root->node = alloc_dummy_extent_buffer(fs_info, nodesize); 858 if (!root->node) { 859 test_std_err(TEST_ALLOC_ROOT); 860 goto out; 861 } 862 863 btrfs_set_header_nritems(root->node, 0); 864 btrfs_set_header_level(root->node, 0); 865 BTRFS_I(inode)->root = root; 866 ret = -EINVAL; 867 868 /* 869 * Need a blank inode item here just so we don't confuse 870 * btrfs_get_extent. 871 */ 872 insert_inode_item_key(root); 873 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize, 874 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1); 875 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize, 0); 876 if (IS_ERR(em)) { 877 test_err("got an error when we shouldn't have"); 878 goto out; 879 } 880 if (em->block_start != EXTENT_MAP_HOLE) { 881 test_err("expected a hole, got %llu", em->block_start); 882 goto out; 883 } 884 if (em->start != 0 || em->len != sectorsize) { 885 test_err( 886 "unexpected extent wanted start 0 len %u, got start %llu len %llu", 887 sectorsize, em->start, em->len); 888 goto out; 889 } 890 if (em->flags != vacancy_only) { 891 test_err("wrong flags, wanted %lu, have %lu", vacancy_only, 892 em->flags); 893 goto out; 894 } 895 free_extent_map(em); 896 897 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize, 898 2 * sectorsize, 0); 899 if (IS_ERR(em)) { 900 test_err("got an error when we shouldn't have"); 901 goto out; 902 } 903 if (em->block_start != sectorsize) { 904 test_err("expected a real extent, got %llu", em->block_start); 905 goto out; 906 } 907 if (em->start != sectorsize || em->len != sectorsize) { 908 test_err( 909 "unexpected extent wanted start %u len %u, got start %llu len %llu", 910 sectorsize, sectorsize, em->start, em->len); 911 goto out; 912 } 913 if (em->flags != 0) { 914 test_err("unexpected flags set, wanted 0 got %lu", 915 em->flags); 916 goto out; 917 } 918 ret = 0; 919 out: 920 if (!IS_ERR(em)) 921 free_extent_map(em); 922 iput(inode); 923 btrfs_free_dummy_root(root); 924 btrfs_free_dummy_fs_info(fs_info); 925 return ret; 926 } 927 928 static int test_extent_accounting(u32 sectorsize, u32 nodesize) 929 { 930 struct btrfs_fs_info *fs_info = NULL; 931 struct inode *inode = NULL; 932 struct btrfs_root *root = NULL; 933 int ret = -ENOMEM; 934 935 test_msg("running outstanding_extents tests"); 936 937 inode = btrfs_new_test_inode(); 938 if (!inode) { 939 test_std_err(TEST_ALLOC_INODE); 940 return ret; 941 } 942 943 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 944 if (!fs_info) { 945 test_std_err(TEST_ALLOC_FS_INFO); 946 goto out; 947 } 948 949 root = btrfs_alloc_dummy_root(fs_info); 950 if (IS_ERR(root)) { 951 test_std_err(TEST_ALLOC_ROOT); 952 goto out; 953 } 954 955 BTRFS_I(inode)->root = root; 956 btrfs_test_inode_set_ops(inode); 957 958 /* [BTRFS_MAX_EXTENT_SIZE] */ 959 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0, 960 NULL); 961 if (ret) { 962 test_err("btrfs_set_extent_delalloc returned %d", ret); 963 goto out; 964 } 965 if (BTRFS_I(inode)->outstanding_extents != 1) { 966 ret = -EINVAL; 967 test_err("miscount, wanted 1, got %u", 968 BTRFS_I(inode)->outstanding_extents); 969 goto out; 970 } 971 972 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */ 973 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE, 974 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1, 975 0, NULL); 976 if (ret) { 977 test_err("btrfs_set_extent_delalloc returned %d", ret); 978 goto out; 979 } 980 if (BTRFS_I(inode)->outstanding_extents != 2) { 981 ret = -EINVAL; 982 test_err("miscount, wanted 2, got %u", 983 BTRFS_I(inode)->outstanding_extents); 984 goto out; 985 } 986 987 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */ 988 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 989 BTRFS_MAX_EXTENT_SIZE >> 1, 990 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1, 991 EXTENT_DELALLOC | EXTENT_DIRTY | 992 EXTENT_UPTODATE, 0, 0, NULL); 993 if (ret) { 994 test_err("clear_extent_bit returned %d", ret); 995 goto out; 996 } 997 if (BTRFS_I(inode)->outstanding_extents != 2) { 998 ret = -EINVAL; 999 test_err("miscount, wanted 2, got %u", 1000 BTRFS_I(inode)->outstanding_extents); 1001 goto out; 1002 } 1003 1004 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */ 1005 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1, 1006 (BTRFS_MAX_EXTENT_SIZE >> 1) 1007 + sectorsize - 1, 1008 0, NULL); 1009 if (ret) { 1010 test_err("btrfs_set_extent_delalloc returned %d", ret); 1011 goto out; 1012 } 1013 if (BTRFS_I(inode)->outstanding_extents != 2) { 1014 ret = -EINVAL; 1015 test_err("miscount, wanted 2, got %u", 1016 BTRFS_I(inode)->outstanding_extents); 1017 goto out; 1018 } 1019 1020 /* 1021 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize] 1022 */ 1023 ret = btrfs_set_extent_delalloc(inode, 1024 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize, 1025 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1, 1026 0, NULL); 1027 if (ret) { 1028 test_err("btrfs_set_extent_delalloc returned %d", ret); 1029 goto out; 1030 } 1031 if (BTRFS_I(inode)->outstanding_extents != 4) { 1032 ret = -EINVAL; 1033 test_err("miscount, wanted 4, got %u", 1034 BTRFS_I(inode)->outstanding_extents); 1035 goto out; 1036 } 1037 1038 /* 1039 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize] 1040 */ 1041 ret = btrfs_set_extent_delalloc(inode, 1042 BTRFS_MAX_EXTENT_SIZE + sectorsize, 1043 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL); 1044 if (ret) { 1045 test_err("btrfs_set_extent_delalloc returned %d", ret); 1046 goto out; 1047 } 1048 if (BTRFS_I(inode)->outstanding_extents != 3) { 1049 ret = -EINVAL; 1050 test_err("miscount, wanted 3, got %u", 1051 BTRFS_I(inode)->outstanding_extents); 1052 goto out; 1053 } 1054 1055 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */ 1056 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 1057 BTRFS_MAX_EXTENT_SIZE + sectorsize, 1058 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 1059 EXTENT_DIRTY | EXTENT_DELALLOC | 1060 EXTENT_UPTODATE, 0, 0, NULL); 1061 if (ret) { 1062 test_err("clear_extent_bit returned %d", ret); 1063 goto out; 1064 } 1065 if (BTRFS_I(inode)->outstanding_extents != 4) { 1066 ret = -EINVAL; 1067 test_err("miscount, wanted 4, got %u", 1068 BTRFS_I(inode)->outstanding_extents); 1069 goto out; 1070 } 1071 1072 /* 1073 * Refill the hole again just for good measure, because I thought it 1074 * might fail and I'd rather satisfy my paranoia at this point. 1075 */ 1076 ret = btrfs_set_extent_delalloc(inode, 1077 BTRFS_MAX_EXTENT_SIZE + sectorsize, 1078 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL); 1079 if (ret) { 1080 test_err("btrfs_set_extent_delalloc returned %d", ret); 1081 goto out; 1082 } 1083 if (BTRFS_I(inode)->outstanding_extents != 3) { 1084 ret = -EINVAL; 1085 test_err("miscount, wanted 3, got %u", 1086 BTRFS_I(inode)->outstanding_extents); 1087 goto out; 1088 } 1089 1090 /* Empty */ 1091 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1, 1092 EXTENT_DIRTY | EXTENT_DELALLOC | 1093 EXTENT_UPTODATE, 0, 0, NULL); 1094 if (ret) { 1095 test_err("clear_extent_bit returned %d", ret); 1096 goto out; 1097 } 1098 if (BTRFS_I(inode)->outstanding_extents) { 1099 ret = -EINVAL; 1100 test_err("miscount, wanted 0, got %u", 1101 BTRFS_I(inode)->outstanding_extents); 1102 goto out; 1103 } 1104 ret = 0; 1105 out: 1106 if (ret) 1107 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1, 1108 EXTENT_DIRTY | EXTENT_DELALLOC | 1109 EXTENT_UPTODATE, 0, 0, NULL); 1110 iput(inode); 1111 btrfs_free_dummy_root(root); 1112 btrfs_free_dummy_fs_info(fs_info); 1113 return ret; 1114 } 1115 1116 int btrfs_test_inodes(u32 sectorsize, u32 nodesize) 1117 { 1118 int ret; 1119 1120 test_msg("running inode tests"); 1121 1122 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only); 1123 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only); 1124 1125 ret = test_btrfs_get_extent(sectorsize, nodesize); 1126 if (ret) 1127 return ret; 1128 ret = test_hole_first(sectorsize, nodesize); 1129 if (ret) 1130 return ret; 1131 return test_extent_accounting(sectorsize, nodesize); 1132 } 1133