bpobj.c revision 297112
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 * Copyright (c) 2014 Integros [integros.com] 25 */ 26 27#include <sys/bpobj.h> 28#include <sys/zfs_context.h> 29#include <sys/refcount.h> 30#include <sys/dsl_pool.h> 31#include <sys/zfeature.h> 32#include <sys/zap.h> 33 34/* 35 * Return an empty bpobj, preferably the empty dummy one (dp_empty_bpobj). 36 */ 37uint64_t 38bpobj_alloc_empty(objset_t *os, int blocksize, dmu_tx_t *tx) 39{ 40 spa_t *spa = dmu_objset_spa(os); 41 dsl_pool_t *dp = dmu_objset_pool(os); 42 43 if (spa_feature_is_enabled(spa, SPA_FEATURE_EMPTY_BPOBJ)) { 44 if (!spa_feature_is_active(spa, SPA_FEATURE_EMPTY_BPOBJ)) { 45 ASSERT0(dp->dp_empty_bpobj); 46 dp->dp_empty_bpobj = 47 bpobj_alloc(os, SPA_OLD_MAXBLOCKSIZE, tx); 48 VERIFY(zap_add(os, 49 DMU_POOL_DIRECTORY_OBJECT, 50 DMU_POOL_EMPTY_BPOBJ, sizeof (uint64_t), 1, 51 &dp->dp_empty_bpobj, tx) == 0); 52 } 53 spa_feature_incr(spa, SPA_FEATURE_EMPTY_BPOBJ, tx); 54 ASSERT(dp->dp_empty_bpobj != 0); 55 return (dp->dp_empty_bpobj); 56 } else { 57 return (bpobj_alloc(os, blocksize, tx)); 58 } 59} 60 61void 62bpobj_decr_empty(objset_t *os, dmu_tx_t *tx) 63{ 64 dsl_pool_t *dp = dmu_objset_pool(os); 65 66 spa_feature_decr(dmu_objset_spa(os), SPA_FEATURE_EMPTY_BPOBJ, tx); 67 if (!spa_feature_is_active(dmu_objset_spa(os), 68 SPA_FEATURE_EMPTY_BPOBJ)) { 69 VERIFY3U(0, ==, zap_remove(dp->dp_meta_objset, 70 DMU_POOL_DIRECTORY_OBJECT, 71 DMU_POOL_EMPTY_BPOBJ, tx)); 72 VERIFY3U(0, ==, dmu_object_free(os, dp->dp_empty_bpobj, tx)); 73 dp->dp_empty_bpobj = 0; 74 } 75} 76 77uint64_t 78bpobj_alloc(objset_t *os, int blocksize, dmu_tx_t *tx) 79{ 80 int size; 81 82 if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_BPOBJ_ACCOUNT) 83 size = BPOBJ_SIZE_V0; 84 else if (spa_version(dmu_objset_spa(os)) < SPA_VERSION_DEADLISTS) 85 size = BPOBJ_SIZE_V1; 86 else 87 size = sizeof (bpobj_phys_t); 88 89 return (dmu_object_alloc(os, DMU_OT_BPOBJ, blocksize, 90 DMU_OT_BPOBJ_HDR, size, tx)); 91} 92 93void 94bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx) 95{ 96 int64_t i; 97 bpobj_t bpo; 98 dmu_object_info_t doi; 99 int epb; 100 dmu_buf_t *dbuf = NULL; 101 102 ASSERT(obj != dmu_objset_pool(os)->dp_empty_bpobj); 103 VERIFY3U(0, ==, bpobj_open(&bpo, os, obj)); 104 105 mutex_enter(&bpo.bpo_lock); 106 107 if (!bpo.bpo_havesubobj || bpo.bpo_phys->bpo_subobjs == 0) 108 goto out; 109 110 VERIFY3U(0, ==, dmu_object_info(os, bpo.bpo_phys->bpo_subobjs, &doi)); 111 epb = doi.doi_data_block_size / sizeof (uint64_t); 112 113 for (i = bpo.bpo_phys->bpo_num_subobjs - 1; i >= 0; i--) { 114 uint64_t *objarray; 115 uint64_t offset, blkoff; 116 117 offset = i * sizeof (uint64_t); 118 blkoff = P2PHASE(i, epb); 119 120 if (dbuf == NULL || dbuf->db_offset > offset) { 121 if (dbuf) 122 dmu_buf_rele(dbuf, FTAG); 123 VERIFY3U(0, ==, dmu_buf_hold(os, 124 bpo.bpo_phys->bpo_subobjs, offset, FTAG, &dbuf, 0)); 125 } 126 127 ASSERT3U(offset, >=, dbuf->db_offset); 128 ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size); 129 130 objarray = dbuf->db_data; 131 bpobj_free(os, objarray[blkoff], tx); 132 } 133 if (dbuf) { 134 dmu_buf_rele(dbuf, FTAG); 135 dbuf = NULL; 136 } 137 VERIFY3U(0, ==, dmu_object_free(os, bpo.bpo_phys->bpo_subobjs, tx)); 138 139out: 140 mutex_exit(&bpo.bpo_lock); 141 bpobj_close(&bpo); 142 143 VERIFY3U(0, ==, dmu_object_free(os, obj, tx)); 144} 145 146int 147bpobj_open(bpobj_t *bpo, objset_t *os, uint64_t object) 148{ 149 dmu_object_info_t doi; 150 int err; 151 152 err = dmu_object_info(os, object, &doi); 153 if (err) 154 return (err); 155 156 bzero(bpo, sizeof (*bpo)); 157 mutex_init(&bpo->bpo_lock, NULL, MUTEX_DEFAULT, NULL); 158 159 ASSERT(bpo->bpo_dbuf == NULL); 160 ASSERT(bpo->bpo_phys == NULL); 161 ASSERT(object != 0); 162 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ); 163 ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_BPOBJ_HDR); 164 165 err = dmu_bonus_hold(os, object, bpo, &bpo->bpo_dbuf); 166 if (err) 167 return (err); 168 169 bpo->bpo_os = os; 170 bpo->bpo_object = object; 171 bpo->bpo_epb = doi.doi_data_block_size >> SPA_BLKPTRSHIFT; 172 bpo->bpo_havecomp = (doi.doi_bonus_size > BPOBJ_SIZE_V0); 173 bpo->bpo_havesubobj = (doi.doi_bonus_size > BPOBJ_SIZE_V1); 174 bpo->bpo_phys = bpo->bpo_dbuf->db_data; 175 return (0); 176} 177 178void 179bpobj_close(bpobj_t *bpo) 180{ 181 /* Lame workaround for closing a bpobj that was never opened. */ 182 if (bpo->bpo_object == 0) 183 return; 184 185 dmu_buf_rele(bpo->bpo_dbuf, bpo); 186 if (bpo->bpo_cached_dbuf != NULL) 187 dmu_buf_rele(bpo->bpo_cached_dbuf, bpo); 188 bpo->bpo_dbuf = NULL; 189 bpo->bpo_phys = NULL; 190 bpo->bpo_cached_dbuf = NULL; 191 bpo->bpo_object = 0; 192 193 mutex_destroy(&bpo->bpo_lock); 194} 195 196static boolean_t 197bpobj_hasentries(bpobj_t *bpo) 198{ 199 return (bpo->bpo_phys->bpo_num_blkptrs != 0 || 200 (bpo->bpo_havesubobj && bpo->bpo_phys->bpo_num_subobjs != 0)); 201} 202 203static int 204bpobj_iterate_impl(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx, 205 boolean_t free) 206{ 207 dmu_object_info_t doi; 208 int epb; 209 int64_t i; 210 int err = 0; 211 dmu_buf_t *dbuf = NULL; 212 213 mutex_enter(&bpo->bpo_lock); 214 215 if (free) 216 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 217 218 for (i = bpo->bpo_phys->bpo_num_blkptrs - 1; i >= 0; i--) { 219 blkptr_t *bparray; 220 blkptr_t *bp; 221 uint64_t offset, blkoff; 222 223 offset = i * sizeof (blkptr_t); 224 blkoff = P2PHASE(i, bpo->bpo_epb); 225 226 if (dbuf == NULL || dbuf->db_offset > offset) { 227 if (dbuf) 228 dmu_buf_rele(dbuf, FTAG); 229 err = dmu_buf_hold(bpo->bpo_os, bpo->bpo_object, offset, 230 FTAG, &dbuf, 0); 231 if (err) 232 break; 233 } 234 235 ASSERT3U(offset, >=, dbuf->db_offset); 236 ASSERT3U(offset, <, dbuf->db_offset + dbuf->db_size); 237 238 bparray = dbuf->db_data; 239 bp = &bparray[blkoff]; 240 err = func(arg, bp, tx); 241 if (err) 242 break; 243 if (free) { 244 bpo->bpo_phys->bpo_bytes -= 245 bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp); 246 ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0); 247 if (bpo->bpo_havecomp) { 248 bpo->bpo_phys->bpo_comp -= BP_GET_PSIZE(bp); 249 bpo->bpo_phys->bpo_uncomp -= BP_GET_UCSIZE(bp); 250 } 251 bpo->bpo_phys->bpo_num_blkptrs--; 252 ASSERT3S(bpo->bpo_phys->bpo_num_blkptrs, >=, 0); 253 } 254 } 255 if (dbuf) { 256 dmu_buf_rele(dbuf, FTAG); 257 dbuf = NULL; 258 } 259 if (free) { 260 VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, bpo->bpo_object, 261 (i + 1) * 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 != 0) { 305 bpobj_close(&sublist); 306 break; 307 } 308 } 309 err = bpobj_iterate_impl(&sublist, func, arg, tx, free); 310 if (free) { 311 VERIFY3U(0, ==, bpobj_space(&sublist, 312 &used_after, &comp_after, &uncomp_after)); 313 bpo->bpo_phys->bpo_bytes -= used_before - used_after; 314 ASSERT3S(bpo->bpo_phys->bpo_bytes, >=, 0); 315 bpo->bpo_phys->bpo_comp -= comp_before - comp_after; 316 bpo->bpo_phys->bpo_uncomp -= 317 uncomp_before - uncomp_after; 318 } 319 320 bpobj_close(&sublist); 321 if (err) 322 break; 323 if (free) { 324 err = dmu_object_free(bpo->bpo_os, 325 objarray[blkoff], tx); 326 if (err) 327 break; 328 bpo->bpo_phys->bpo_num_subobjs--; 329 ASSERT3S(bpo->bpo_phys->bpo_num_subobjs, >=, 0); 330 } 331 } 332 if (dbuf) { 333 dmu_buf_rele(dbuf, FTAG); 334 dbuf = NULL; 335 } 336 if (free) { 337 VERIFY3U(0, ==, dmu_free_range(bpo->bpo_os, 338 bpo->bpo_phys->bpo_subobjs, 339 (i + 1) * sizeof (uint64_t), -1ULL, tx)); 340 } 341 342out: 343 /* If there are no entries, there should be no bytes. */ 344 if (!bpobj_hasentries(bpo)) { 345 ASSERT0(bpo->bpo_phys->bpo_bytes); 346 ASSERT0(bpo->bpo_phys->bpo_comp); 347 ASSERT0(bpo->bpo_phys->bpo_uncomp); 348 } 349 350 mutex_exit(&bpo->bpo_lock); 351 return (err); 352} 353 354/* 355 * Iterate and remove the entries. If func returns nonzero, iteration 356 * will stop and that entry will not be removed. 357 */ 358int 359bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx) 360{ 361 return (bpobj_iterate_impl(bpo, func, arg, tx, B_TRUE)); 362} 363 364/* 365 * Iterate the entries. If func returns nonzero, iteration will stop. 366 */ 367int 368bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx) 369{ 370 return (bpobj_iterate_impl(bpo, func, arg, tx, B_FALSE)); 371} 372 373void 374bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx) 375{ 376 bpobj_t subbpo; 377 uint64_t used, comp, uncomp, subsubobjs; 378 379 ASSERT(bpo->bpo_havesubobj); 380 ASSERT(bpo->bpo_havecomp); 381 ASSERT(bpo->bpo_object != dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj); 382 383 if (subobj == dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj) { 384 bpobj_decr_empty(bpo->bpo_os, tx); 385 return; 386 } 387 388 VERIFY3U(0, ==, bpobj_open(&subbpo, bpo->bpo_os, subobj)); 389 VERIFY3U(0, ==, bpobj_space(&subbpo, &used, &comp, &uncomp)); 390 391 if (!bpobj_hasentries(&subbpo)) { 392 /* No point in having an empty subobj. */ 393 bpobj_close(&subbpo); 394 bpobj_free(bpo->bpo_os, subobj, tx); 395 return; 396 } 397 398 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 399 if (bpo->bpo_phys->bpo_subobjs == 0) { 400 bpo->bpo_phys->bpo_subobjs = dmu_object_alloc(bpo->bpo_os, 401 DMU_OT_BPOBJ_SUBOBJ, SPA_OLD_MAXBLOCKSIZE, 402 DMU_OT_NONE, 0, tx); 403 } 404 405 dmu_object_info_t doi; 406 ASSERT0(dmu_object_info(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, &doi)); 407 ASSERT3U(doi.doi_type, ==, DMU_OT_BPOBJ_SUBOBJ); 408 409 mutex_enter(&bpo->bpo_lock); 410 dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 411 bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 412 sizeof (subobj), &subobj, tx); 413 bpo->bpo_phys->bpo_num_subobjs++; 414 415 /* 416 * If subobj has only one block of subobjs, then move subobj's 417 * subobjs to bpo's subobj list directly. This reduces 418 * recursion in bpobj_iterate due to nested subobjs. 419 */ 420 subsubobjs = subbpo.bpo_phys->bpo_subobjs; 421 if (subsubobjs != 0) { 422 dmu_object_info_t doi; 423 424 VERIFY3U(0, ==, dmu_object_info(bpo->bpo_os, subsubobjs, &doi)); 425 if (doi.doi_max_offset == doi.doi_data_block_size) { 426 dmu_buf_t *subdb; 427 uint64_t numsubsub = subbpo.bpo_phys->bpo_num_subobjs; 428 429 VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, subsubobjs, 430 0, FTAG, &subdb, 0)); 431 /* 432 * Make sure that we are not asking dmu_write() 433 * to write more data than we have in our buffer. 434 */ 435 VERIFY3U(subdb->db_size, >=, 436 numsubsub * sizeof (subobj)); 437 dmu_write(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 438 bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 439 numsubsub * sizeof (subobj), subdb->db_data, tx); 440 dmu_buf_rele(subdb, FTAG); 441 bpo->bpo_phys->bpo_num_subobjs += numsubsub; 442 443 dmu_buf_will_dirty(subbpo.bpo_dbuf, tx); 444 subbpo.bpo_phys->bpo_subobjs = 0; 445 VERIFY3U(0, ==, dmu_object_free(bpo->bpo_os, 446 subsubobjs, tx)); 447 } 448 } 449 bpo->bpo_phys->bpo_bytes += used; 450 bpo->bpo_phys->bpo_comp += comp; 451 bpo->bpo_phys->bpo_uncomp += uncomp; 452 mutex_exit(&bpo->bpo_lock); 453 454 bpobj_close(&subbpo); 455} 456 457void 458bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx) 459{ 460 blkptr_t stored_bp = *bp; 461 uint64_t offset; 462 int blkoff; 463 blkptr_t *bparray; 464 465 ASSERT(!BP_IS_HOLE(bp)); 466 ASSERT(bpo->bpo_object != dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj); 467 468 if (BP_IS_EMBEDDED(bp)) { 469 /* 470 * The bpobj will compress better without the payload. 471 * 472 * Note that we store EMBEDDED bp's because they have an 473 * uncompressed size, which must be accounted for. An 474 * alternative would be to add their size to bpo_uncomp 475 * without storing the bp, but that would create additional 476 * complications: bpo_uncomp would be inconsistent with the 477 * set of BP's stored, and bpobj_iterate() wouldn't visit 478 * all the space accounted for in the bpobj. 479 */ 480 bzero(&stored_bp, sizeof (stored_bp)); 481 stored_bp.blk_prop = bp->blk_prop; 482 stored_bp.blk_birth = bp->blk_birth; 483 } else if (!BP_GET_DEDUP(bp)) { 484 /* The bpobj will compress better without the checksum */ 485 bzero(&stored_bp.blk_cksum, sizeof (stored_bp.blk_cksum)); 486 } 487 488 /* We never need the fill count. */ 489 stored_bp.blk_fill = 0; 490 491 mutex_enter(&bpo->bpo_lock); 492 493 offset = bpo->bpo_phys->bpo_num_blkptrs * sizeof (stored_bp); 494 blkoff = P2PHASE(bpo->bpo_phys->bpo_num_blkptrs, bpo->bpo_epb); 495 496 if (bpo->bpo_cached_dbuf == NULL || 497 offset < bpo->bpo_cached_dbuf->db_offset || 498 offset >= bpo->bpo_cached_dbuf->db_offset + 499 bpo->bpo_cached_dbuf->db_size) { 500 if (bpo->bpo_cached_dbuf) 501 dmu_buf_rele(bpo->bpo_cached_dbuf, bpo); 502 VERIFY3U(0, ==, dmu_buf_hold(bpo->bpo_os, bpo->bpo_object, 503 offset, bpo, &bpo->bpo_cached_dbuf, 0)); 504 } 505 506 dmu_buf_will_dirty(bpo->bpo_cached_dbuf, tx); 507 bparray = bpo->bpo_cached_dbuf->db_data; 508 bparray[blkoff] = stored_bp; 509 510 dmu_buf_will_dirty(bpo->bpo_dbuf, tx); 511 bpo->bpo_phys->bpo_num_blkptrs++; 512 bpo->bpo_phys->bpo_bytes += 513 bp_get_dsize_sync(dmu_objset_spa(bpo->bpo_os), bp); 514 if (bpo->bpo_havecomp) { 515 bpo->bpo_phys->bpo_comp += BP_GET_PSIZE(bp); 516 bpo->bpo_phys->bpo_uncomp += BP_GET_UCSIZE(bp); 517 } 518 mutex_exit(&bpo->bpo_lock); 519} 520 521struct space_range_arg { 522 spa_t *spa; 523 uint64_t mintxg; 524 uint64_t maxtxg; 525 uint64_t used; 526 uint64_t comp; 527 uint64_t uncomp; 528}; 529 530/* ARGSUSED */ 531static int 532space_range_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 533{ 534 struct space_range_arg *sra = arg; 535 536 if (bp->blk_birth > sra->mintxg && bp->blk_birth <= sra->maxtxg) { 537 if (dsl_pool_sync_context(spa_get_dsl(sra->spa))) 538 sra->used += bp_get_dsize_sync(sra->spa, bp); 539 else 540 sra->used += bp_get_dsize(sra->spa, bp); 541 sra->comp += BP_GET_PSIZE(bp); 542 sra->uncomp += BP_GET_UCSIZE(bp); 543 } 544 return (0); 545} 546 547int 548bpobj_space(bpobj_t *bpo, uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 549{ 550 mutex_enter(&bpo->bpo_lock); 551 552 *usedp = bpo->bpo_phys->bpo_bytes; 553 if (bpo->bpo_havecomp) { 554 *compp = bpo->bpo_phys->bpo_comp; 555 *uncompp = bpo->bpo_phys->bpo_uncomp; 556 mutex_exit(&bpo->bpo_lock); 557 return (0); 558 } else { 559 mutex_exit(&bpo->bpo_lock); 560 return (bpobj_space_range(bpo, 0, UINT64_MAX, 561 usedp, compp, uncompp)); 562 } 563} 564 565/* 566 * Return the amount of space in the bpobj which is: 567 * mintxg < blk_birth <= maxtxg 568 */ 569int 570bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg, 571 uint64_t *usedp, uint64_t *compp, uint64_t *uncompp) 572{ 573 struct space_range_arg sra = { 0 }; 574 int err; 575 576 /* 577 * As an optimization, if they want the whole txg range, just 578 * get bpo_bytes rather than iterating over the bps. 579 */ 580 if (mintxg < TXG_INITIAL && maxtxg == UINT64_MAX && bpo->bpo_havecomp) 581 return (bpobj_space(bpo, usedp, compp, uncompp)); 582 583 sra.spa = dmu_objset_spa(bpo->bpo_os); 584 sra.mintxg = mintxg; 585 sra.maxtxg = maxtxg; 586 587 err = bpobj_iterate_nofree(bpo, space_range_cb, &sra, NULL); 588 *usedp = sra.used; 589 *compp = sra.comp; 590 *uncompp = sra.uncomp; 591 return (err); 592} 593