1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2011, 2014 by Delphix. All rights reserved. 24 */ 25 26 #include <sys/bpobj.h> 27 #include <sys/zfs_context.h> 28 #include <sys/refcount.h> 29 #include <sys/dsl_pool.h> 30 #include <sys/zfeature.h> 31 #include <sys/zap.h> 32 33 /* 34 * Return an empty bpobj, preferably the empty dummy one (dp_empty_bpobj). 35 */ 36 uint64_t 37 bpobj_alloc_empty(objset_t *os, int blocksize, dmu_tx_t *tx) 38 { 39 spa_t *spa = dmu_objset_spa(os); 40 dsl_pool_t *dp = dmu_objset_pool(os); 41 42 if (spa_feature_is_enabled(spa, SPA_FEATURE_EMPTY_BPOBJ)) { 43 if (!spa_feature_is_active(spa, SPA_FEATURE_EMPTY_BPOBJ)) { 44 ASSERT0(dp->dp_empty_bpobj); 45 dp->dp_empty_bpobj = 46 bpobj_alloc(os, SPA_OLD_MAXBLOCKSIZE, tx); 47 VERIFY(zap_add(os, 48 DMU_POOL_DIRECTORY_OBJECT, 49 DMU_POOL_EMPTY_BPOBJ, sizeof (uint64_t), 1, 50 &dp->dp_empty_bpobj, tx) == 0); 51 } 52 spa_feature_incr(spa, SPA_FEATURE_EMPTY_BPOBJ, tx); 53 ASSERT(dp->dp_empty_bpobj != 0); 54 return (dp->dp_empty_bpobj); 55 } else { 56 return (bpobj_alloc(os, blocksize, tx)); 57 } 58 } 59 60 void 61 bpobj_decr_empty(objset_t *os, dmu_tx_t *tx) 62 { 63 dsl_pool_t *dp = dmu_objset_pool(os); 64 65 spa_feature_decr(dmu_objset_spa(os), SPA_FEATURE_EMPTY_BPOBJ, tx); 66 if (!spa_feature_is_active(dmu_objset_spa(os), 67 SPA_FEATURE_EMPTY_BPOBJ)) { 68 VERIFY3U(0, ==, zap_remove(dp->dp_meta_objset, 69 DMU_POOL_DIRECTORY_OBJECT, 70 DMU_POOL_EMPTY_BPOBJ, tx)); 71 VERIFY3U(0, ==, dmu_object_free(os, dp->dp_empty_bpobj, tx)); 72 dp->dp_empty_bpobj = 0; 73 } 74 } 75 76 uint64_t 77 bpobj_alloc(objset_t *os, int blocksize, dmu_tx_t *tx) 78 { 79 int size; 80 81 if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_BPOBJ_ACCOUNT) 82 size = BPOBJ_SIZE_V0; 83 else if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_DEADLISTS) 84 size = BPOBJ_SIZE_V1; 85 else 86 size = sizeof (bpobj_phys_t); 87 88 return (dmu_object_alloc(os, DMU_OT_BPOBJ, blocksize, 89 DMU_OT_BPOBJ_HDR, size, tx)); 90 } 91 92 void 93 bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx) 94 { 95 int64_t i; 96 bpobj_t bpo; 97 dmu_object_info_t doi; 98 int epb; 99 dmu_buf_t *dbuf = NULL; 100 101 ASSERT(obj != dmu_objset_pool(os)->dp_empty_bpobj); 102 VERIFY3U(0, ==, bpobj_open(&bpo, os, obj)); 103 104 mutex_enter(&bpo.bpo_lock); 105 106 if (!bpo.bpo_havesubobj || bpo.bpo_phys->bpo_subobjs == 0) 107 goto out; 108 109 VERIFY3U(0, ==, dmu_object_info(os, bpo.bpo_phys->bpo_subobjs, &doi)); 110 epb = doi.doi_data_block_size / sizeof (uint64_t); 111 112 for (i = bpo.bpo_phys->bpo_num_subobjs - 1; i >= 0; i--) { 113 uint64_t *objarray; 114 uint64_t offset, blkoff; 115 116 offset = i * sizeof (uint64_t); 117 blkoff = P2PHASE(i, epb); 118 119 if (dbuf == NULL || dbuf->db_offset > offset) { 120 if (dbuf) 121 dmu_buf_rele(dbuf, FTAG); 122 VERIFY3U(0, ==, dmu_buf_hold(os, 123 bpo.bpo_phys->bpo_subobjs, offset, FTAG, &dbuf, 0)); 124 } 125 126 ASSERT3U(offset, >=, dbuf->db_offset); 127 ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size); 128 129 objarray = dbuf->db_data; 130 bpobj_free(os, objarray[blkoff], tx); 131 } 132 if (dbuf) { 133 dmu_buf_rele(dbuf, FTAG); 134 dbuf = NULL; 135 } 136 VERIFY3U(0, ==, dmu_object_free(os, bpo.bpo_phys->bpo_subobjs, tx)); 137 138 out: 139 mutex_exit(&bpo.bpo_lock); 140 bpobj_close(&bpo); 141 142 VERIFY3U(0, ==, dmu_object_free(os, obj, tx)); 143 } 144 145 int 146 bpobj_open(bpobj_t *bpo, objset_t *os, uint64_t object) 147 { 148 dmu_object_info_t doi; 149 int err; 150 151 err = dmu_object_info(os, object, &doi); 152 if (err) 153 return (err); 154 155 bzero(bpo, sizeof (*bpo)); 156 mutex_init(&bpo->bpo_lock, NULL, MUTEX_DEFAULT, NULL); 157 158 ASSERT(bpo->bpo_dbuf == NULL); 159 ASSERT(bpo->bpo_phys == NULL); 160 ASSERT(object != 0); 161 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ); 162 ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_BPOBJ_HDR); 163 164 err = dmu_bonus_hold(os, object, bpo, &bpo->bpo_dbuf); 165 if (err) 166 return (err); 167 168 bpo->bpo_os = os; 169 bpo->bpo_object = object; 170 bpo->bpo_epb = doi.doi_data_block_size >> SPA_BLKPTRSHIFT; 171 bpo->bpo_havecomp = (doi.doi_bonus_size > BPOBJ_SIZE_V0); 172 bpo->bpo_havesubobj = (doi.doi_bonus_size > BPOBJ_SIZE_V1); 173 bpo->bpo_phys = bpo->bpo_dbuf->db_data; 174 return (0); 175 } 176 177 void 178 bpobj_close(bpobj_t *bpo) 179 { 180 /* Lame workaround for closing a bpobj that was never opened. */ 181 if (bpo->bpo_object == 0) 182 return; 183 184 dmu_buf_rele(bpo->bpo_dbuf, bpo); 185 if (bpo->bpo_cached_dbuf != NULL) 186 dmu_buf_rele(bpo->bpo_cached_dbuf, bpo); 187 bpo->bpo_dbuf = NULL; 188 bpo->bpo_phys = NULL; 189 bpo->bpo_cached_dbuf = NULL; 190 bpo->bpo_object = 0; 191 192 mutex_destroy(&bpo->bpo_lock); 193 } 194 195 static boolean_t 196 bpobj_hasentries(bpobj_t *bpo) 197 { 198 return (bpo->bpo_phys->bpo_num_blkptrs != 0 || 199 (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_num_subobjs != 0)); 200 } 201 202 static int 203 bpobj_iterate_impl(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx, 204 boolean_t free) 205 { 206 dmu_object_info_t doi; 207 int epb; 208 int64_t i; 209 int err = 0; 210 dmu_buf_t *dbuf = NULL; 211 212 mutex_enter(&bpo->bpo_lock); 213 214 if (free) 215 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 216 217 for (i = bpo->bpo_phys->bpo_num_blkptrs - 1; i >= 0; i--) { 218 blkptr_t *bparray; 219 blkptr_t *bp; 220 uint64_t offset, blkoff; 221 222 offset = i * sizeof (blkptr_t); 223 blkoff = P2PHASE(i, bpo->bpo_epb); 224 225 if (dbuf == NULL || dbuf->db_offset > offset) { 226 if (dbuf) 227 dmu_buf_rele(dbuf, FTAG); 228 err = dmu_buf_hold(bpo->bpo_os, bpo->bpo_object, offset, 229 FTAG, &dbuf, 0); 230 if (err) 231 break; 232 } 233 234 ASSERT3U(offset, >=, dbuf->db_offset); 235 ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size); 236 237 bparray = dbuf->db_data; 238 bp = &bparray[blkoff]; 239 err = func(arg, bp, tx); 240 if (err) 241 break; 242 if (free) { 243 bpo->bpo_phys->bpo_bytes -= 244 bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp); 245 ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0); 246 if (bpo->bpo_havecomp) { 247 bpo->bpo_phys->bpo_comp -= BP_GET_PSIZE(bp); 248 bpo->bpo_phys->bpo_uncomp -= BP_GET_UCSIZE(bp); 249 } 250 bpo->bpo_phys->bpo_num_blkptrs--; 251 ASSERT3S(bpo->bpo_phys->bpo_num_blkptrs, >=, 0); 252 } 253 } 254 if (dbuf) { 255 dmu_buf_rele(dbuf, FTAG); 256 dbuf = NULL; 257 } 258 if (free) { 259 VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, bpo->bpo_object, 260 (i + 1) * sizeof (blkptr_t), -1ULL, tx)); 261 } 262 if (err || !bpo->bpo_havesubobj || bpo->bpo_phys->bpo_subobjs == 0) 263 goto out; 264 265 ASSERT(bpo->bpo_havecomp); 266 err = dmu_object_info(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, &doi); 267 if (err) { 268 mutex_exit(&bpo->bpo_lock); 269 return (err); 270 } 271 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ_SUBOBJ); 272 epb = doi.doi_data_block_size / sizeof (uint64_t); 273 274 for (i = bpo->bpo_phys->bpo_num_subobjs - 1; i >= 0; i--) { 275 uint64_t *objarray; 276 uint64_t offset, blkoff; 277 bpobj_t sublist; 278 uint64_t used_before, comp_before, uncomp_before; 279 uint64_t used_after, comp_after, uncomp_after; 280 281 offset = i * sizeof (uint64_t); 282 blkoff = P2PHASE(i, epb); 283 284 if (dbuf == NULL || dbuf->db_offset > offset) { 285 if (dbuf) 286 dmu_buf_rele(dbuf, FTAG); 287 err = dmu_buf_hold(bpo->bpo_os, 288 bpo->bpo_phys->bpo_subobjs, offset, FTAG, &dbuf, 0); 289 if (err) 290 break; 291 } 292 293 ASSERT3U(offset, >=, dbuf->db_offset); 294 ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size); 295 296 objarray = dbuf->db_data; 297 err = bpobj_open(&sublist, bpo->bpo_os, objarray[blkoff]); 298 if (err) 299 break; 300 if (free) { 301 err = bpobj_space(&sublist, 302 &used_before, &comp_before, &uncomp_before); 303 if (err != 0) { 304 bpobj_close(&sublist); 305 break; 306 } 307 } 308 err = bpobj_iterate_impl(&sublist, func, arg, tx, free); 309 if (free) { 310 VERIFY3U(0, ==, bpobj_space(&sublist, 311 &used_after, &comp_after, &uncomp_after)); 312 bpo->bpo_phys->bpo_bytes -= used_before - used_after; 313 ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0); 314 bpo->bpo_phys->bpo_comp -= comp_before - comp_after; 315 bpo->bpo_phys->bpo_uncomp -= 316 uncomp_before - uncomp_after; 317 } 318 319 bpobj_close(&sublist); 320 if (err) 321 break; 322 if (free) { 323 err = dmu_object_free(bpo->bpo_os, 324 objarray[blkoff], tx); 325 if (err) 326 break; 327 bpo->bpo_phys->bpo_num_subobjs--; 328 ASSERT3S(bpo->bpo_phys->bpo_num_subobjs, >=, 0); 329 } 330 } 331 if (dbuf) { 332 dmu_buf_rele(dbuf, FTAG); 333 dbuf = NULL; 334 } 335 if (free) { 336 VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, 337 bpo->bpo_phys->bpo_subobjs, 338 (i + 1) * sizeof (uint64_t), -1ULL, tx)); 339 } 340 341 out: 342 /* If there are no entries, there should be no bytes. */ 343 if (!bpobj_hasentries(bpo)) { 344 ASSERT0(bpo->bpo_phys->bpo_bytes); 345 ASSERT0(bpo->bpo_phys->bpo_comp); 346 ASSERT0(bpo->bpo_phys->bpo_uncomp); 347 } 348 349 mutex_exit(&bpo->bpo_lock); 350 return (err); 351 } 352 353 /* 354 * Iterate and remove the entries. If func returns nonzero, iteration 355 * will stop and that entry will not be removed. 356 */ 357 int 358 bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx) 359 { 360 return (bpobj_iterate_impl(bpo, func, arg, tx, B_TRUE)); 361 } 362 363 /* 364 * Iterate the entries. If func returns nonzero, iteration will stop. 365 */ 366 int 367 bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx) 368 { 369 return (bpobj_iterate_impl(bpo, func, arg, tx, B_FALSE)); 370 } 371 372 void 373 bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx) 374 { 375 bpobj_t subbpo; 376 uint64_t used, comp, uncomp, subsubobjs; 377 378 ASSERT(bpo->bpo_havesubobj); 379 ASSERT(bpo->bpo_havecomp); 380 ASSERT(bpo->bpo_object != dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj); 381 382 if (subobj == dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj) { 383 bpobj_decr_empty(bpo->bpo_os, tx); 384 return; 385 } 386 387 VERIFY3U(0, ==, bpobj_open(&subbpo, bpo->bpo_os, subobj)); 388 VERIFY3U(0, ==, bpobj_space(&subbpo, &used, &comp, &uncomp)); 389 390 if (!bpobj_hasentries(&subbpo)) { 391 /* No point in having an empty subobj. */ 392 bpobj_close(&subbpo); 393 bpobj_free(bpo->bpo_os, subobj, tx); 394 return; 395 } 396 397 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 398 if (bpo->bpo_phys->bpo_subobjs == 0) { 399 bpo->bpo_phys->bpo_subobjs = dmu_object_alloc(bpo->bpo_os, 400 DMU_OT_BPOBJ_SUBOBJ, SPA_OLD_MAXBLOCKSIZE, 401 DMU_OT_NONE, 0, tx); 402 } 403 404 dmu_object_info_t doi; 405 ASSERT0(dmu_object_info(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, &doi)); 406 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ_SUBOBJ); 407 408 mutex_enter(&bpo->bpo_lock); 409 dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 410 bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 411 sizeof (subobj), &subobj, tx); 412 bpo->bpo_phys->bpo_num_subobjs++; 413 414 /* 415 * If subobj has only one block of subobjs, then move subobj's 416 * subobjs to bpo's subobj list directly. This reduces 417 * recursion in bpobj_iterate due to nested subobjs. 418 */ 419 subsubobjs = subbpo.bpo_phys->bpo_subobjs; 420 if (subsubobjs != 0) { 421 dmu_object_info_t doi; 422 423 VERIFY3U(0, ==, dmu_object_info(bpo->bpo_os, subsubobjs, &doi)); 424 if (doi.doi_max_offset == doi.doi_data_block_size) { 425 dmu_buf_t *subdb; 426 uint64_t numsubsub = subbpo.bpo_phys->bpo_num_subobjs; 427 428 VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, subsubobjs, 429 0, FTAG, &subdb, 0)); 430 /* 431 * Make sure that we are not asking dmu_write() 432 * to write more data than we have in our buffer. 433 */ 434 VERIFY3U(subdb->db_size, >=, 435 numsubsub * sizeof (subobj)); 436 dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 437 bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 438 numsubsub * sizeof (subobj), subdb->db_data, tx); 439 dmu_buf_rele(subdb, FTAG); 440 bpo->bpo_phys->bpo_num_subobjs += numsubsub; 441 442 dmu_buf_will_dirty(subbpo.bpo_dbuf, tx); 443 subbpo.bpo_phys->bpo_subobjs = 0; 444 VERIFY3U(0, ==, dmu_object_free(bpo->bpo_os, 445 subsubobjs, tx)); 446 } 447 } 448 bpo->bpo_phys->bpo_bytes += used; 449 bpo->bpo_phys->bpo_comp += comp; 450 bpo->bpo_phys->bpo_uncomp += uncomp; 451 mutex_exit(&bpo->bpo_lock); 452 453 bpobj_close(&subbpo); 454 } 455 456 void 457 bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx) 458 { 459 blkptr_t stored_bp = *bp; 460 uint64_t offset; 461 int blkoff; 462 blkptr_t *bparray; 463 464 ASSERT(!BP_IS_HOLE(bp)); 465 ASSERT(bpo->bpo_object != dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj); 466 467 if (BP_IS_EMBEDDED(bp)) { 468 /* 469 * The bpobj will compress better without the payload. 470 * 471 * Note that we store EMBEDDED bp's because they have an 472 * uncompressed size, which must be accounted for. An 473 * alternative would be to add their size to bpo_uncomp 474 * without storing the bp, but that would create additional 475 * complications: bpo_uncomp would be inconsistent with the 476 * set of BP's stored, and bpobj_iterate() wouldn't visit 477 * all the space accounted for in the bpobj. 478 */ 479 bzero(&stored_bp, sizeof (stored_bp)); 480 stored_bp.blk_prop = bp->blk_prop; 481 stored_bp.blk_birth = bp->blk_birth; 482 } else if (!BP_GET_DEDUP(bp)) { 483 /* The bpobj will compress better without the checksum */ 484 bzero(&stored_bp.blk_cksum, sizeof (stored_bp.blk_cksum)); 485 } 486 487 /* We never need the fill count. */ 488 stored_bp.blk_fill = 0; 489 490 mutex_enter(&bpo->bpo_lock); 491 492 offset = bpo->bpo_phys->bpo_num_blkptrs * sizeof (stored_bp); 493 blkoff = P2PHASE(bpo->bpo_phys->bpo_num_blkptrs, bpo->bpo_epb); 494 495 if (bpo->bpo_cached_dbuf == NULL || 496 offset < bpo->bpo_cached_dbuf->db_offset || 497 offset >= bpo->bpo_cached_dbuf->db_offset + 498 bpo->bpo_cached_dbuf->db_size) { 499 if (bpo->bpo_cached_dbuf) 500 dmu_buf_rele(bpo->bpo_cached_dbuf, bpo); 501 VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, bpo->bpo_object, 502 offset, bpo, &bpo->bpo_cached_dbuf, 0)); 503 } 504 505 dmu_buf_will_dirty(bpo->bpo_cached_dbuf, tx); 506 bparray = bpo->bpo_cached_dbuf->db_data; 507 bparray[blkoff] = stored_bp; 508 509 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 510 bpo->bpo_phys->bpo_num_blkptrs++; 511 bpo->bpo_phys->bpo_bytes += 512 bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp); 513 if (bpo->bpo_havecomp) { 514 bpo->bpo_phys->bpo_comp += BP_GET_PSIZE(bp); 515 bpo->bpo_phys->bpo_uncomp += BP_GET_UCSIZE(bp); 516 } 517 mutex_exit(&bpo->bpo_lock); 518 } 519 520 struct space_range_arg { 521 spa_t *spa; 522 uint64_t mintxg; 523 uint64_t maxtxg; 524 uint64_t used; 525 uint64_t comp; 526 uint64_t uncomp; 527 }; 528 529 /* ARGSUSED */ 530 static int 531 space_range_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 532 { 533 struct space_range_arg *sra = arg; 534 535 if (bp->blk_birth > sra->mintxg && bp->blk_birth <= sra->maxtxg) { 536 if (dsl_pool_sync_context(spa_get_dsl(sra->spa))) 537 sra->used += bp_get_dsize_sync(sra->spa, bp); 538 else 539 sra->used += bp_get_dsize(sra->spa, bp); 540 sra->comp += BP_GET_PSIZE(bp); 541 sra->uncomp += BP_GET_UCSIZE(bp); 542 } 543 return (0); 544 } 545 546 int 547 bpobj_space(bpobj_t *bpo, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 548 { 549 mutex_enter(&bpo->bpo_lock); 550 551 *usedp = bpo->bpo_phys->bpo_bytes; 552 if (bpo->bpo_havecomp) { 553 *compp = bpo->bpo_phys->bpo_comp; 554 *uncompp = bpo->bpo_phys->bpo_uncomp; 555 mutex_exit(&bpo->bpo_lock); 556 return (0); 557 } else { 558 mutex_exit(&bpo->bpo_lock); 559 return (bpobj_space_range(bpo, 0, UINT64_MAX, 560 usedp, compp, uncompp)); 561 } 562 } 563 564 /* 565 * Return the amount of space in the bpobj which is: 566 * mintxg < blk_birth <= maxtxg 567 */ 568 int 569 bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg, 570 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 571 { 572 struct space_range_arg sra = { 0 }; 573 int err; 574 575 /* 576 * As an optimization, if they want the whole txg range, just 577 * get bpo_bytes rather than iterating over the bps. 578 */ 579 if (mintxg < TXG_INITIAL && maxtxg == UINT64_MAX && bpo->bpo_havecomp) 580 return (bpobj_space(bpo, usedp, compp, uncompp)); 581 582 sra.spa = dmu_objset_spa(bpo->bpo_os); 583 sra.mintxg = mintxg; 584 sra.maxtxg = maxtxg; 585 586 err = bpobj_iterate_nofree(bpo, space_range_cb, &sra, NULL); 587 *usedp = sra.used; 588 *compp = sra.comp; 589 *uncompp = sra.uncomp; 590 return (err); 591 } 592