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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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, sectorsize); 731 if (IS_ERR(em)) { 732 test_err("got an error when we shouldn't have"); 733 goto out; 734 } 735 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 736 test_err("expected a real extent, got %llu", em->block_start); 737 goto out; 738 } 739 if (em->start != offset || em->len != sectorsize) { 740 test_err( 741 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 742 offset, sectorsize, em->start, em->len); 743 goto out; 744 } 745 if (em->flags != 0) { 746 test_err("unexpected flags set, want 0 have %lu", em->flags); 747 goto out; 748 } 749 if (em->orig_start != em->start) { 750 test_err("wrong orig offset, want %llu, have %llu", em->start, 751 em->orig_start); 752 goto out; 753 } 754 offset = em->start + em->len; 755 free_extent_map(em); 756 757 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, SZ_4M); 758 if (IS_ERR(em)) { 759 test_err("got an error when we shouldn't have"); 760 goto out; 761 } 762 if (em->block_start != EXTENT_MAP_HOLE) { 763 test_err("expected a hole extent, got %llu", em->block_start); 764 goto out; 765 } 766 /* 767 * Currently we just return a length that we requested rather than the 768 * length of the actual hole, if this changes we'll have to change this 769 * test. 770 */ 771 if (em->start != offset || em->len != 3 * sectorsize) { 772 test_err( 773 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 774 offset, 3 * sectorsize, em->start, em->len); 775 goto out; 776 } 777 if (em->flags != vacancy_only) { 778 test_err("unexpected flags set, want %lu have %lu", 779 vacancy_only, em->flags); 780 goto out; 781 } 782 if (em->orig_start != em->start) { 783 test_err("wrong orig offset, want %llu, have %llu", em->start, 784 em->orig_start); 785 goto out; 786 } 787 offset = em->start + em->len; 788 free_extent_map(em); 789 790 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, offset, sectorsize); 791 if (IS_ERR(em)) { 792 test_err("got an error when we shouldn't have"); 793 goto out; 794 } 795 if (em->block_start >= EXTENT_MAP_LAST_BYTE) { 796 test_err("expected a real extent, got %llu", em->block_start); 797 goto out; 798 } 799 if (em->start != offset || em->len != sectorsize) { 800 test_err( 801 "unexpected extent wanted start %llu len %u, got start %llu len %llu", 802 offset, sectorsize, em->start, em->len); 803 goto out; 804 } 805 if (em->flags != 0) { 806 test_err("unexpected flags set, want 0 have %lu", em->flags); 807 goto out; 808 } 809 if (em->orig_start != em->start) { 810 test_err("wrong orig offset, want %llu, have %llu", em->start, 811 em->orig_start); 812 goto out; 813 } 814 ret = 0; 815 out: 816 if (!IS_ERR(em)) 817 free_extent_map(em); 818 iput(inode); 819 btrfs_free_dummy_root(root); 820 btrfs_free_dummy_fs_info(fs_info); 821 return ret; 822 } 823 824 static int test_hole_first(u32 sectorsize, u32 nodesize) 825 { 826 struct btrfs_fs_info *fs_info = NULL; 827 struct inode *inode = NULL; 828 struct btrfs_root *root = NULL; 829 struct extent_map *em = NULL; 830 int ret = -ENOMEM; 831 832 test_msg("running hole first btrfs_get_extent test"); 833 834 inode = btrfs_new_test_inode(); 835 if (!inode) { 836 test_std_err(TEST_ALLOC_INODE); 837 return ret; 838 } 839 840 BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY; 841 BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID; 842 BTRFS_I(inode)->location.offset = 0; 843 844 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 845 if (!fs_info) { 846 test_std_err(TEST_ALLOC_FS_INFO); 847 goto out; 848 } 849 850 root = btrfs_alloc_dummy_root(fs_info); 851 if (IS_ERR(root)) { 852 test_std_err(TEST_ALLOC_ROOT); 853 goto out; 854 } 855 856 root->node = alloc_dummy_extent_buffer(fs_info, nodesize); 857 if (!root->node) { 858 test_std_err(TEST_ALLOC_ROOT); 859 goto out; 860 } 861 862 btrfs_set_header_nritems(root->node, 0); 863 btrfs_set_header_level(root->node, 0); 864 BTRFS_I(inode)->root = root; 865 ret = -EINVAL; 866 867 /* 868 * Need a blank inode item here just so we don't confuse 869 * btrfs_get_extent. 870 */ 871 insert_inode_item_key(root); 872 insert_extent(root, sectorsize, sectorsize, sectorsize, 0, sectorsize, 873 sectorsize, BTRFS_FILE_EXTENT_REG, 0, 1); 874 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, 0, 2 * sectorsize); 875 if (IS_ERR(em)) { 876 test_err("got an error when we shouldn't have"); 877 goto out; 878 } 879 if (em->block_start != EXTENT_MAP_HOLE) { 880 test_err("expected a hole, got %llu", em->block_start); 881 goto out; 882 } 883 if (em->start != 0 || em->len != sectorsize) { 884 test_err( 885 "unexpected extent wanted start 0 len %u, got start %llu len %llu", 886 sectorsize, em->start, em->len); 887 goto out; 888 } 889 if (em->flags != vacancy_only) { 890 test_err("wrong flags, wanted %lu, have %lu", vacancy_only, 891 em->flags); 892 goto out; 893 } 894 free_extent_map(em); 895 896 em = btrfs_get_extent(BTRFS_I(inode), NULL, 0, sectorsize, 2 * sectorsize); 897 if (IS_ERR(em)) { 898 test_err("got an error when we shouldn't have"); 899 goto out; 900 } 901 if (em->block_start != sectorsize) { 902 test_err("expected a real extent, got %llu", em->block_start); 903 goto out; 904 } 905 if (em->start != sectorsize || em->len != sectorsize) { 906 test_err( 907 "unexpected extent wanted start %u len %u, got start %llu len %llu", 908 sectorsize, sectorsize, em->start, em->len); 909 goto out; 910 } 911 if (em->flags != 0) { 912 test_err("unexpected flags set, wanted 0 got %lu", 913 em->flags); 914 goto out; 915 } 916 ret = 0; 917 out: 918 if (!IS_ERR(em)) 919 free_extent_map(em); 920 iput(inode); 921 btrfs_free_dummy_root(root); 922 btrfs_free_dummy_fs_info(fs_info); 923 return ret; 924 } 925 926 static int test_extent_accounting(u32 sectorsize, u32 nodesize) 927 { 928 struct btrfs_fs_info *fs_info = NULL; 929 struct inode *inode = NULL; 930 struct btrfs_root *root = NULL; 931 int ret = -ENOMEM; 932 933 test_msg("running outstanding_extents tests"); 934 935 inode = btrfs_new_test_inode(); 936 if (!inode) { 937 test_std_err(TEST_ALLOC_INODE); 938 return ret; 939 } 940 941 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize); 942 if (!fs_info) { 943 test_std_err(TEST_ALLOC_FS_INFO); 944 goto out; 945 } 946 947 root = btrfs_alloc_dummy_root(fs_info); 948 if (IS_ERR(root)) { 949 test_std_err(TEST_ALLOC_ROOT); 950 goto out; 951 } 952 953 BTRFS_I(inode)->root = root; 954 btrfs_test_inode_set_ops(inode); 955 956 /* [BTRFS_MAX_EXTENT_SIZE] */ 957 ret = btrfs_set_extent_delalloc(inode, 0, BTRFS_MAX_EXTENT_SIZE - 1, 0, 958 NULL); 959 if (ret) { 960 test_err("btrfs_set_extent_delalloc returned %d", ret); 961 goto out; 962 } 963 if (BTRFS_I(inode)->outstanding_extents != 1) { 964 ret = -EINVAL; 965 test_err("miscount, wanted 1, got %u", 966 BTRFS_I(inode)->outstanding_extents); 967 goto out; 968 } 969 970 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */ 971 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE, 972 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1, 973 0, NULL); 974 if (ret) { 975 test_err("btrfs_set_extent_delalloc returned %d", ret); 976 goto out; 977 } 978 if (BTRFS_I(inode)->outstanding_extents != 2) { 979 ret = -EINVAL; 980 test_err("miscount, wanted 2, got %u", 981 BTRFS_I(inode)->outstanding_extents); 982 goto out; 983 } 984 985 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */ 986 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 987 BTRFS_MAX_EXTENT_SIZE >> 1, 988 (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1, 989 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL); 990 if (ret) { 991 test_err("clear_extent_bit returned %d", ret); 992 goto out; 993 } 994 if (BTRFS_I(inode)->outstanding_extents != 2) { 995 ret = -EINVAL; 996 test_err("miscount, wanted 2, got %u", 997 BTRFS_I(inode)->outstanding_extents); 998 goto out; 999 } 1000 1001 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */ 1002 ret = btrfs_set_extent_delalloc(inode, BTRFS_MAX_EXTENT_SIZE >> 1, 1003 (BTRFS_MAX_EXTENT_SIZE >> 1) 1004 + sectorsize - 1, 1005 0, NULL); 1006 if (ret) { 1007 test_err("btrfs_set_extent_delalloc returned %d", ret); 1008 goto out; 1009 } 1010 if (BTRFS_I(inode)->outstanding_extents != 2) { 1011 ret = -EINVAL; 1012 test_err("miscount, wanted 2, got %u", 1013 BTRFS_I(inode)->outstanding_extents); 1014 goto out; 1015 } 1016 1017 /* 1018 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize] 1019 */ 1020 ret = btrfs_set_extent_delalloc(inode, 1021 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize, 1022 (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1, 1023 0, NULL); 1024 if (ret) { 1025 test_err("btrfs_set_extent_delalloc returned %d", ret); 1026 goto out; 1027 } 1028 if (BTRFS_I(inode)->outstanding_extents != 4) { 1029 ret = -EINVAL; 1030 test_err("miscount, wanted 4, got %u", 1031 BTRFS_I(inode)->outstanding_extents); 1032 goto out; 1033 } 1034 1035 /* 1036 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize] 1037 */ 1038 ret = btrfs_set_extent_delalloc(inode, 1039 BTRFS_MAX_EXTENT_SIZE + sectorsize, 1040 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL); 1041 if (ret) { 1042 test_err("btrfs_set_extent_delalloc returned %d", ret); 1043 goto out; 1044 } 1045 if (BTRFS_I(inode)->outstanding_extents != 3) { 1046 ret = -EINVAL; 1047 test_err("miscount, wanted 3, got %u", 1048 BTRFS_I(inode)->outstanding_extents); 1049 goto out; 1050 } 1051 1052 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */ 1053 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 1054 BTRFS_MAX_EXTENT_SIZE + sectorsize, 1055 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 1056 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL); 1057 if (ret) { 1058 test_err("clear_extent_bit returned %d", ret); 1059 goto out; 1060 } 1061 if (BTRFS_I(inode)->outstanding_extents != 4) { 1062 ret = -EINVAL; 1063 test_err("miscount, wanted 4, got %u", 1064 BTRFS_I(inode)->outstanding_extents); 1065 goto out; 1066 } 1067 1068 /* 1069 * Refill the hole again just for good measure, because I thought it 1070 * might fail and I'd rather satisfy my paranoia at this point. 1071 */ 1072 ret = btrfs_set_extent_delalloc(inode, 1073 BTRFS_MAX_EXTENT_SIZE + sectorsize, 1074 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, 0, NULL); 1075 if (ret) { 1076 test_err("btrfs_set_extent_delalloc returned %d", ret); 1077 goto out; 1078 } 1079 if (BTRFS_I(inode)->outstanding_extents != 3) { 1080 ret = -EINVAL; 1081 test_err("miscount, wanted 3, got %u", 1082 BTRFS_I(inode)->outstanding_extents); 1083 goto out; 1084 } 1085 1086 /* Empty */ 1087 ret = clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1, 1088 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL); 1089 if (ret) { 1090 test_err("clear_extent_bit returned %d", ret); 1091 goto out; 1092 } 1093 if (BTRFS_I(inode)->outstanding_extents) { 1094 ret = -EINVAL; 1095 test_err("miscount, wanted 0, got %u", 1096 BTRFS_I(inode)->outstanding_extents); 1097 goto out; 1098 } 1099 ret = 0; 1100 out: 1101 if (ret) 1102 clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, (u64)-1, 1103 EXTENT_DELALLOC | EXTENT_UPTODATE, 0, 0, NULL); 1104 iput(inode); 1105 btrfs_free_dummy_root(root); 1106 btrfs_free_dummy_fs_info(fs_info); 1107 return ret; 1108 } 1109 1110 int btrfs_test_inodes(u32 sectorsize, u32 nodesize) 1111 { 1112 int ret; 1113 1114 test_msg("running inode tests"); 1115 1116 set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only); 1117 set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only); 1118 1119 ret = test_btrfs_get_extent(sectorsize, nodesize); 1120 if (ret) 1121 return ret; 1122 ret = test_hole_first(sectorsize, nodesize); 1123 if (ret) 1124 return ret; 1125 return test_extent_accounting(sectorsize, nodesize); 1126 } 1127