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) 2013 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 i++; 260 VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, bpo->bpo_object, 261 i * sizeof (blkptr_t), -1ULL, tx)); 262 } 263 if (err || !bpo->bpo_havesubobj || bpo->bpo_phys->bpo_subobjs == 0) 264 goto out; 265 266 ASSERT(bpo->bpo_havecomp); 267 err = dmu_object_info(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, &doi); 268 if (err) { 269 mutex_exit(&bpo->bpo_lock); 270 return (err); 271 } 272 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ_SUBOBJ); 273 epb = doi.doi_data_block_size / sizeof (uint64_t); 274 275 for (i = bpo->bpo_phys->bpo_num_subobjs - 1; i >= 0; i--) { 276 uint64_t *objarray; 277 uint64_t offset, blkoff; 278 bpobj_t sublist; 279 uint64_t used_before, comp_before, uncomp_before; 280 uint64_t used_after, comp_after, uncomp_after; 281 282 offset = i * sizeof (uint64_t); 283 blkoff = P2PHASE(i, epb); 284 285 if (dbuf == NULL || dbuf->db_offset > offset) { 286 if (dbuf) 287 dmu_buf_rele(dbuf, FTAG); 288 err = dmu_buf_hold(bpo->bpo_os, 289 bpo->bpo_phys->bpo_subobjs, offset, FTAG, &dbuf, 0); 290 if (err) 291 break; 292 } 293 294 ASSERT3U(offset, >=, dbuf->db_offset); 295 ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size); 296 297 objarray = dbuf->db_data; 298 err = bpobj_open(&sublist, bpo->bpo_os, objarray[blkoff]); 299 if (err) 300 break; 301 if (free) { 302 err = bpobj_space(&sublist, 303 &used_before, &comp_before, &uncomp_before); 304 if (err) 305 break; 306 } 307 err = bpobj_iterate_impl(&sublist, func, arg, tx, free); 308 if (free) { 309 VERIFY3U(0, ==, bpobj_space(&sublist, 310 &used_after, &comp_after, &uncomp_after)); 311 bpo->bpo_phys->bpo_bytes -= used_before - used_after; 312 ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0); 313 bpo->bpo_phys->bpo_comp -= comp_before - comp_after; 314 bpo->bpo_phys->bpo_uncomp -= 315 uncomp_before - uncomp_after; 316 } 317 318 bpobj_close(&sublist); 319 if (err) 320 break; 321 if (free) { 322 err = dmu_object_free(bpo->bpo_os, 323 objarray[blkoff], tx); 324 if (err) 325 break; 326 bpo->bpo_phys->bpo_num_subobjs--; 327 ASSERT3S(bpo->bpo_phys->bpo_num_subobjs, >=, 0); 328 } 329 } 330 if (dbuf) { 331 dmu_buf_rele(dbuf, FTAG); 332 dbuf = NULL; 333 } 334 if (free) { 335 VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, 336 bpo->bpo_phys->bpo_subobjs, 337 (i + 1) * sizeof (uint64_t), -1ULL, tx)); 338 } 339 340 out: 341 /* If there are no entries, there should be no bytes. */ 342 if (!bpobj_hasentries(bpo)) { 343 ASSERT0(bpo->bpo_phys->bpo_bytes); 344 ASSERT0(bpo->bpo_phys->bpo_comp); 345 ASSERT0(bpo->bpo_phys->bpo_uncomp); 346 } 347 348 mutex_exit(&bpo->bpo_lock); 349 return (err); 350 } 351 352 /* 353 * Iterate and remove the entries. If func returns nonzero, iteration 354 * will stop and that entry will not be removed. 355 */ 356 int 357 bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx) 358 { 359 return (bpobj_iterate_impl(bpo, func, arg, tx, B_TRUE)); 360 } 361 362 /* 363 * Iterate the entries. If func returns nonzero, iteration will stop. 364 */ 365 int 366 bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx) 367 { 368 return (bpobj_iterate_impl(bpo, func, arg, tx, B_FALSE)); 369 } 370 371 void 372 bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx) 373 { 374 bpobj_t subbpo; 375 uint64_t used, comp, uncomp, subsubobjs; 376 377 ASSERT(bpo->bpo_havesubobj); 378 ASSERT(bpo->bpo_havecomp); 379 ASSERT(bpo->bpo_object != dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj); 380 381 if (subobj == dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj) { 382 bpobj_decr_empty(bpo->bpo_os, tx); 383 return; 384 } 385 386 VERIFY3U(0, ==, bpobj_open(&subbpo, bpo->bpo_os, subobj)); 387 VERIFY3U(0, ==, bpobj_space(&subbpo, &used, &comp, &uncomp)); 388 389 if (!bpobj_hasentries(&subbpo)) { 390 /* No point in having an empty subobj. */ 391 bpobj_close(&subbpo); 392 bpobj_free(bpo->bpo_os, subobj, tx); 393 return; 394 } 395 396 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 397 if (bpo->bpo_phys->bpo_subobjs == 0) { 398 bpo->bpo_phys->bpo_subobjs = dmu_object_alloc(bpo->bpo_os, 399 DMU_OT_BPOBJ_SUBOBJ, SPA_OLD_MAXBLOCKSIZE, 400 DMU_OT_NONE, 0, tx); 401 } 402 403 dmu_object_info_t doi; 404 ASSERT0(dmu_object_info(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, &doi)); 405 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ_SUBOBJ); 406 407 mutex_enter(&bpo->bpo_lock); 408 dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 409 bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 410 sizeof (subobj), &subobj, tx); 411 bpo->bpo_phys->bpo_num_subobjs++; 412 413 /* 414 * If subobj has only one block of subobjs, then move subobj's 415 * subobjs to bpo's subobj list directly. This reduces 416 * recursion in bpobj_iterate due to nested subobjs. 417 */ 418 subsubobjs = subbpo.bpo_phys->bpo_subobjs; 419 if (subsubobjs != 0) { 420 dmu_object_info_t doi; 421 422 VERIFY3U(0, ==, dmu_object_info(bpo->bpo_os, subsubobjs, &doi)); 423 if (doi.doi_max_offset == doi.doi_data_block_size) { 424 dmu_buf_t *subdb; 425 uint64_t numsubsub = subbpo.bpo_phys->bpo_num_subobjs; 426 427 VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, subsubobjs, 428 0, FTAG, &subdb, 0)); 429 /* 430 * Make sure that we are not asking dmu_write() 431 * to write more data than we have in our buffer. 432 */ 433 VERIFY3U(subdb->db_size, >=, 434 numsubsub * sizeof (subobj)); 435 dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 436 bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 437 numsubsub * sizeof (subobj), subdb->db_data, tx); 438 dmu_buf_rele(subdb, FTAG); 439 bpo->bpo_phys->bpo_num_subobjs += numsubsub; 440 441 dmu_buf_will_dirty(subbpo.bpo_dbuf, tx); 442 subbpo.bpo_phys->bpo_subobjs = 0; 443 VERIFY3U(0, ==, dmu_object_free(bpo->bpo_os, 444 subsubobjs, tx)); 445 } 446 } 447 bpo->bpo_phys->bpo_bytes += used; 448 bpo->bpo_phys->bpo_comp += comp; 449 bpo->bpo_phys->bpo_uncomp += uncomp; 450 mutex_exit(&bpo->bpo_lock); 451 452 bpobj_close(&subbpo); 453 } 454 455 void 456 bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx) 457 { 458 blkptr_t stored_bp = *bp; 459 uint64_t offset; 460 int blkoff; 461 blkptr_t *bparray; 462 463 ASSERT(!BP_IS_HOLE(bp)); 464 ASSERT(bpo->bpo_object != dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj); 465 466 if (BP_IS_EMBEDDED(bp)) { 467 /* 468 * The bpobj will compress better without the payload. 469 * 470 * Note that we store EMBEDDED bp's because they have an 471 * uncompressed size, which must be accounted for. An 472 * alternative would be to add their size to bpo_uncomp 473 * without storing the bp, but that would create additional 474 * complications: bpo_uncomp would be inconsistent with the 475 * set of BP's stored, and bpobj_iterate() wouldn't visit 476 * all the space accounted for in the bpobj. 477 */ 478 bzero(&stored_bp, sizeof (stored_bp)); 479 stored_bp.blk_prop = bp->blk_prop; 480 stored_bp.blk_birth = bp->blk_birth; 481 } else if (!BP_GET_DEDUP(bp)) { 482 /* The bpobj will compress better without the checksum */ 483 bzero(&stored_bp.blk_cksum, sizeof (stored_bp.blk_cksum)); 484 } 485 486 /* We never need the fill count. */ 487 stored_bp.blk_fill = 0; 488 489 mutex_enter(&bpo->bpo_lock); 490 491 offset = bpo->bpo_phys->bpo_num_blkptrs * sizeof (stored_bp); 492 blkoff = P2PHASE(bpo->bpo_phys->bpo_num_blkptrs, bpo->bpo_epb); 493 494 if (bpo->bpo_cached_dbuf == NULL || 495 offset < bpo->bpo_cached_dbuf->db_offset || 496 offset >= bpo->bpo_cached_dbuf->db_offset + 497 bpo->bpo_cached_dbuf->db_size) { 498 if (bpo->bpo_cached_dbuf) 499 dmu_buf_rele(bpo->bpo_cached_dbuf, bpo); 500 VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, bpo->bpo_object, 501 offset, bpo, &bpo->bpo_cached_dbuf, 0)); 502 } 503 504 dmu_buf_will_dirty(bpo->bpo_cached_dbuf, tx); 505 bparray = bpo->bpo_cached_dbuf->db_data; 506 bparray[blkoff] = stored_bp; 507 508 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 509 bpo->bpo_phys->bpo_num_blkptrs++; 510 bpo->bpo_phys->bpo_bytes += 511 bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp); 512 if (bpo->bpo_havecomp) { 513 bpo->bpo_phys->bpo_comp += BP_GET_PSIZE(bp); 514 bpo->bpo_phys->bpo_uncomp += BP_GET_UCSIZE(bp); 515 } 516 mutex_exit(&bpo->bpo_lock); 517 } 518 519 struct space_range_arg { 520 spa_t *spa; 521 uint64_t mintxg; 522 uint64_t maxtxg; 523 uint64_t used; 524 uint64_t comp; 525 uint64_t uncomp; 526 }; 527 528 /* ARGSUSED */ 529 static int 530 space_range_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 531 { 532 struct space_range_arg *sra = arg; 533 534 if (bp->blk_birth > sra->mintxg && bp->blk_birth <= sra->maxtxg) { 535 if (dsl_pool_sync_context(spa_get_dsl(sra->spa))) 536 sra->used += bp_get_dsize_sync(sra->spa, bp); 537 else 538 sra->used += bp_get_dsize(sra->spa, bp); 539 sra->comp += BP_GET_PSIZE(bp); 540 sra->uncomp += BP_GET_UCSIZE(bp); 541 } 542 return (0); 543 } 544 545 int 546 bpobj_space(bpobj_t *bpo, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 547 { 548 mutex_enter(&bpo->bpo_lock); 549 550 *usedp = bpo->bpo_phys->bpo_bytes; 551 if (bpo->bpo_havecomp) { 552 *compp = bpo->bpo_phys->bpo_comp; 553 *uncompp = bpo->bpo_phys->bpo_uncomp; 554 mutex_exit(&bpo->bpo_lock); 555 return (0); 556 } else { 557 mutex_exit(&bpo->bpo_lock); 558 return (bpobj_space_range(bpo, 0, UINT64_MAX, 559 usedp, compp, uncompp)); 560 } 561 } 562 563 /* 564 * Return the amount of space in the bpobj which is: 565 * mintxg < blk_birth <= maxtxg 566 */ 567 int 568 bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg, 569 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 570 { 571 struct space_range_arg sra = { 0 }; 572 int err; 573 574 /* 575 * As an optimization, if they want the whole txg range, just 576 * get bpo_bytes rather than iterating over the bps. 577 */ 578 if (mintxg < TXG_INITIAL && maxtxg == UINT64_MAX && bpo->bpo_havecomp) 579 return (bpobj_space(bpo, usedp, compp, uncompp)); 580 581 sra.spa = dmu_objset_spa(bpo->bpo_os); 582 sra.mintxg = mintxg; 583 sra.maxtxg = maxtxg; 584 585 err = bpobj_iterate_nofree(bpo, space_range_cb, &sra, NULL); 586 *usedp = sra.used; 587 *compp = sra.comp; 588 *uncompp = sra.uncomp; 589 return (err); 590 } 591