dmu_send.c revision 286708
1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23221263Smm * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24286708Smav * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 25264835Sdelphij * Copyright (c) 2014, Joyent, Inc. All rights reserved. 26235222Smm * Copyright (c) 2012, Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27272810Sdelphij * Copyright 2014 HybridCluster. All rights reserved. 28221263Smm */ 29168404Spjd 30168404Spjd#include <sys/dmu.h> 31168404Spjd#include <sys/dmu_impl.h> 32168404Spjd#include <sys/dmu_tx.h> 33168404Spjd#include <sys/dbuf.h> 34168404Spjd#include <sys/dnode.h> 35168404Spjd#include <sys/zfs_context.h> 36168404Spjd#include <sys/dmu_objset.h> 37168404Spjd#include <sys/dmu_traverse.h> 38168404Spjd#include <sys/dsl_dataset.h> 39168404Spjd#include <sys/dsl_dir.h> 40219089Spjd#include <sys/dsl_prop.h> 41168404Spjd#include <sys/dsl_pool.h> 42168404Spjd#include <sys/dsl_synctask.h> 43168404Spjd#include <sys/zfs_ioctl.h> 44168404Spjd#include <sys/zap.h> 45168404Spjd#include <sys/zio_checksum.h> 46219089Spjd#include <sys/zfs_znode.h> 47219089Spjd#include <zfs_fletcher.h> 48219089Spjd#include <sys/avl.h> 49219089Spjd#include <sys/ddt.h> 50219089Spjd#include <sys/zfs_onexit.h> 51248571Smm#include <sys/dmu_send.h> 52248571Smm#include <sys/dsl_destroy.h> 53268075Sdelphij#include <sys/blkptr.h> 54260183Sdelphij#include <sys/dsl_bookmark.h> 55268075Sdelphij#include <sys/zfeature.h> 56286705Smav#include <sys/bqueue.h> 57168404Spjd 58268075Sdelphij#ifdef __FreeBSD__ 59268075Sdelphij#undef dump_write 60268075Sdelphij#define dump_write dmu_dump_write 61268075Sdelphij#endif 62268075Sdelphij 63228103Smm/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ 64228103Smmint zfs_send_corrupt_data = B_FALSE; 65286705Smavint zfs_send_queue_length = 16 * 1024 * 1024; 66286705Smavint zfs_recv_queue_length = 16 * 1024 * 1024; 67228103Smm 68185029Spjdstatic char *dmu_recv_tag = "dmu_recv_tag"; 69248571Smmstatic const char *recv_clone_name = "%recv"; 70185029Spjd 71286705Smav#define BP_SPAN(datablkszsec, indblkshift, level) \ 72286705Smav (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \ 73286705Smav (level) * (indblkshift - SPA_BLKPTRSHIFT))) 74286705Smav 75286705Smavstruct send_thread_arg { 76286705Smav bqueue_t q; 77286705Smav dsl_dataset_t *ds; /* Dataset to traverse */ 78286705Smav uint64_t fromtxg; /* Traverse from this txg */ 79286705Smav int flags; /* flags to pass to traverse_dataset */ 80286705Smav int error_code; 81286705Smav boolean_t cancel; 82286705Smav}; 83286705Smav 84286705Smavstruct send_block_record { 85286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 86286705Smav blkptr_t bp; 87286705Smav zbookmark_phys_t zb; 88286705Smav uint8_t indblkshift; 89286705Smav uint16_t datablkszsec; 90286705Smav bqueue_node_t ln; 91286705Smav}; 92286705Smav 93168404Spjdstatic int 94235222Smmdump_bytes(dmu_sendarg_t *dsp, void *buf, int len) 95168404Spjd{ 96235222Smm dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset; 97168404Spjd struct uio auio; 98168404Spjd struct iovec aiov; 99240415Smm ASSERT0(len % 8); 100168404Spjd 101168404Spjd aiov.iov_base = buf; 102168404Spjd aiov.iov_len = len; 103168404Spjd auio.uio_iov = &aiov; 104168404Spjd auio.uio_iovcnt = 1; 105168404Spjd auio.uio_resid = len; 106169170Spjd auio.uio_segflg = UIO_SYSSPACE; 107168404Spjd auio.uio_rw = UIO_WRITE; 108168404Spjd auio.uio_offset = (off_t)-1; 109235222Smm auio.uio_td = dsp->dsa_td; 110168404Spjd#ifdef _KERNEL 111235222Smm if (dsp->dsa_fp->f_type == DTYPE_VNODE) 112168404Spjd bwillwrite(); 113235222Smm dsp->dsa_err = fo_write(dsp->dsa_fp, &auio, dsp->dsa_td->td_ucred, 0, 114235222Smm dsp->dsa_td); 115168404Spjd#else 116168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 117235222Smm dsp->dsa_err = EOPNOTSUPP; 118168404Spjd#endif 119235222Smm mutex_enter(&ds->ds_sendstream_lock); 120235222Smm *dsp->dsa_off += len; 121235222Smm mutex_exit(&ds->ds_sendstream_lock); 122235222Smm 123235222Smm return (dsp->dsa_err); 124168404Spjd} 125168404Spjd 126286587Smav/* 127286587Smav * For all record types except BEGIN, fill in the checksum (overlaid in 128286587Smav * drr_u.drr_checksum.drr_checksum). The checksum verifies everything 129286587Smav * up to the start of the checksum itself. 130286587Smav */ 131168404Spjdstatic int 132286587Smavdump_record(dmu_sendarg_t *dsp, void *payload, int payload_len) 133286587Smav{ 134286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 135286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 136286587Smav fletcher_4_incremental_native(dsp->dsa_drr, 137286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 138286587Smav &dsp->dsa_zc); 139286587Smav if (dsp->dsa_drr->drr_type != DRR_BEGIN) { 140286587Smav ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u. 141286587Smav drr_checksum.drr_checksum)); 142286587Smav dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc; 143286587Smav } 144286587Smav fletcher_4_incremental_native(&dsp->dsa_drr-> 145286587Smav drr_u.drr_checksum.drr_checksum, 146286587Smav sizeof (zio_cksum_t), &dsp->dsa_zc); 147286587Smav if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) 148286587Smav return (SET_ERROR(EINTR)); 149286587Smav if (payload_len != 0) { 150286587Smav fletcher_4_incremental_native(payload, payload_len, 151286587Smav &dsp->dsa_zc); 152286587Smav if (dump_bytes(dsp, payload, payload_len) != 0) 153286587Smav return (SET_ERROR(EINTR)); 154286587Smav } 155286587Smav return (0); 156286587Smav} 157286587Smav 158286587Smavstatic int 159235222Smmdump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 160168404Spjd uint64_t length) 161168404Spjd{ 162235222Smm struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); 163219089Spjd 164253821Sdelphij /* 165253821Sdelphij * When we receive a free record, dbuf_free_range() assumes 166253821Sdelphij * that the receiving system doesn't have any dbufs in the range 167253821Sdelphij * being freed. This is always true because there is a one-record 168253821Sdelphij * constraint: we only send one WRITE record for any given 169253821Sdelphij * object+offset. We know that the one-record constraint is 170253821Sdelphij * true because we always send data in increasing order by 171253821Sdelphij * object,offset. 172253821Sdelphij * 173253821Sdelphij * If the increasing-order constraint ever changes, we should find 174253821Sdelphij * another way to assert that the one-record constraint is still 175253821Sdelphij * satisfied. 176253821Sdelphij */ 177253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 178253821Sdelphij (object == dsp->dsa_last_data_object && 179253821Sdelphij offset > dsp->dsa_last_data_offset)); 180253821Sdelphij 181253821Sdelphij /* 182253821Sdelphij * If we are doing a non-incremental send, then there can't 183253821Sdelphij * be any data in the dataset we're receiving into. Therefore 184253821Sdelphij * a free record would simply be a no-op. Save space by not 185253821Sdelphij * sending it to begin with. 186253821Sdelphij */ 187253821Sdelphij if (!dsp->dsa_incremental) 188253821Sdelphij return (0); 189253821Sdelphij 190237458Smm if (length != -1ULL && offset + length < offset) 191237458Smm length = -1ULL; 192237458Smm 193219089Spjd /* 194219089Spjd * If there is a pending op, but it's not PENDING_FREE, push it out, 195219089Spjd * since free block aggregation can only be done for blocks of the 196219089Spjd * same type (i.e., DRR_FREE records can only be aggregated with 197219089Spjd * other DRR_FREE records. DRR_FREEOBJECTS records can only be 198219089Spjd * aggregated with other DRR_FREEOBJECTS records. 199219089Spjd */ 200235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 201235222Smm dsp->dsa_pending_op != PENDING_FREE) { 202286587Smav if (dump_record(dsp, NULL, 0) != 0) 203249195Smm return (SET_ERROR(EINTR)); 204235222Smm dsp->dsa_pending_op = PENDING_NONE; 205219089Spjd } 206219089Spjd 207235222Smm if (dsp->dsa_pending_op == PENDING_FREE) { 208219089Spjd /* 209219089Spjd * There should never be a PENDING_FREE if length is -1 210219089Spjd * (because dump_dnode is the only place where this 211219089Spjd * function is called with a -1, and only after flushing 212219089Spjd * any pending record). 213219089Spjd */ 214219089Spjd ASSERT(length != -1ULL); 215219089Spjd /* 216219089Spjd * Check to see whether this free block can be aggregated 217219089Spjd * with pending one. 218219089Spjd */ 219219089Spjd if (drrf->drr_object == object && drrf->drr_offset + 220219089Spjd drrf->drr_length == offset) { 221219089Spjd drrf->drr_length += length; 222219089Spjd return (0); 223219089Spjd } else { 224219089Spjd /* not a continuation. Push out pending record */ 225286587Smav if (dump_record(dsp, NULL, 0) != 0) 226249195Smm return (SET_ERROR(EINTR)); 227235222Smm dsp->dsa_pending_op = PENDING_NONE; 228219089Spjd } 229219089Spjd } 230219089Spjd /* create a FREE record and make it pending */ 231235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 232235222Smm dsp->dsa_drr->drr_type = DRR_FREE; 233219089Spjd drrf->drr_object = object; 234219089Spjd drrf->drr_offset = offset; 235219089Spjd drrf->drr_length = length; 236235222Smm drrf->drr_toguid = dsp->dsa_toguid; 237219089Spjd if (length == -1ULL) { 238286587Smav if (dump_record(dsp, NULL, 0) != 0) 239249195Smm return (SET_ERROR(EINTR)); 240219089Spjd } else { 241235222Smm dsp->dsa_pending_op = PENDING_FREE; 242219089Spjd } 243168404Spjd 244168404Spjd return (0); 245168404Spjd} 246168404Spjd 247168404Spjdstatic int 248268075Sdelphijdump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, 249219089Spjd uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) 250168404Spjd{ 251235222Smm struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); 252219089Spjd 253253821Sdelphij /* 254253821Sdelphij * We send data in increasing object, offset order. 255253821Sdelphij * See comment in dump_free() for details. 256253821Sdelphij */ 257253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 258253821Sdelphij (object == dsp->dsa_last_data_object && 259253821Sdelphij offset > dsp->dsa_last_data_offset)); 260253821Sdelphij dsp->dsa_last_data_object = object; 261253821Sdelphij dsp->dsa_last_data_offset = offset + blksz - 1; 262219089Spjd 263219089Spjd /* 264219089Spjd * If there is any kind of pending aggregation (currently either 265219089Spjd * a grouping of free objects or free blocks), push it out to 266219089Spjd * the stream, since aggregation can't be done across operations 267219089Spjd * of different types. 268219089Spjd */ 269235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 270286587Smav if (dump_record(dsp, NULL, 0) != 0) 271249195Smm return (SET_ERROR(EINTR)); 272235222Smm dsp->dsa_pending_op = PENDING_NONE; 273219089Spjd } 274286587Smav /* write a WRITE record */ 275235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 276235222Smm dsp->dsa_drr->drr_type = DRR_WRITE; 277219089Spjd drrw->drr_object = object; 278219089Spjd drrw->drr_type = type; 279219089Spjd drrw->drr_offset = offset; 280219089Spjd drrw->drr_length = blksz; 281235222Smm drrw->drr_toguid = dsp->dsa_toguid; 282274337Sdelphij if (bp == NULL || BP_IS_EMBEDDED(bp)) { 283268075Sdelphij /* 284274337Sdelphij * There's no pre-computed checksum for partial-block 285274337Sdelphij * writes or embedded BP's, so (like 286274337Sdelphij * fletcher4-checkummed blocks) userland will have to 287274337Sdelphij * compute a dedup-capable checksum itself. 288268075Sdelphij */ 289268075Sdelphij drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; 290268075Sdelphij } else { 291268075Sdelphij drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); 292268075Sdelphij if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup) 293268075Sdelphij drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; 294268075Sdelphij DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); 295268075Sdelphij DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); 296268075Sdelphij DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); 297268075Sdelphij drrw->drr_key.ddk_cksum = bp->blk_cksum; 298268075Sdelphij } 299168404Spjd 300286587Smav if (dump_record(dsp, data, blksz) != 0) 301249195Smm return (SET_ERROR(EINTR)); 302219089Spjd return (0); 303219089Spjd} 304219089Spjd 305219089Spjdstatic int 306268075Sdelphijdump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 307268075Sdelphij int blksz, const blkptr_t *bp) 308268075Sdelphij{ 309268075Sdelphij char buf[BPE_PAYLOAD_SIZE]; 310268075Sdelphij struct drr_write_embedded *drrw = 311268075Sdelphij &(dsp->dsa_drr->drr_u.drr_write_embedded); 312268075Sdelphij 313268075Sdelphij if (dsp->dsa_pending_op != PENDING_NONE) { 314286587Smav if (dump_record(dsp, NULL, 0) != 0) 315268075Sdelphij return (EINTR); 316268075Sdelphij dsp->dsa_pending_op = PENDING_NONE; 317268075Sdelphij } 318268075Sdelphij 319268075Sdelphij ASSERT(BP_IS_EMBEDDED(bp)); 320268075Sdelphij 321268075Sdelphij bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 322268075Sdelphij dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; 323268075Sdelphij drrw->drr_object = object; 324268075Sdelphij drrw->drr_offset = offset; 325268075Sdelphij drrw->drr_length = blksz; 326268075Sdelphij drrw->drr_toguid = dsp->dsa_toguid; 327268075Sdelphij drrw->drr_compression = BP_GET_COMPRESS(bp); 328268075Sdelphij drrw->drr_etype = BPE_GET_ETYPE(bp); 329268075Sdelphij drrw->drr_lsize = BPE_GET_LSIZE(bp); 330268075Sdelphij drrw->drr_psize = BPE_GET_PSIZE(bp); 331268075Sdelphij 332268075Sdelphij decode_embedded_bp_compressed(bp, buf); 333268075Sdelphij 334286587Smav if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) 335268075Sdelphij return (EINTR); 336268075Sdelphij return (0); 337268075Sdelphij} 338268075Sdelphij 339268075Sdelphijstatic int 340235222Smmdump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) 341219089Spjd{ 342235222Smm struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); 343219089Spjd 344235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 345286587Smav if (dump_record(dsp, NULL, 0) != 0) 346249195Smm return (SET_ERROR(EINTR)); 347235222Smm dsp->dsa_pending_op = PENDING_NONE; 348219089Spjd } 349219089Spjd 350219089Spjd /* write a SPILL record */ 351235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 352235222Smm dsp->dsa_drr->drr_type = DRR_SPILL; 353219089Spjd drrs->drr_object = object; 354219089Spjd drrs->drr_length = blksz; 355235222Smm drrs->drr_toguid = dsp->dsa_toguid; 356219089Spjd 357286587Smav if (dump_record(dsp, data, blksz) != 0) 358249195Smm return (SET_ERROR(EINTR)); 359168404Spjd return (0); 360168404Spjd} 361168404Spjd 362168404Spjdstatic int 363235222Smmdump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) 364168404Spjd{ 365235222Smm struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); 366219089Spjd 367253821Sdelphij /* See comment in dump_free(). */ 368253821Sdelphij if (!dsp->dsa_incremental) 369253821Sdelphij return (0); 370253821Sdelphij 371219089Spjd /* 372219089Spjd * If there is a pending op, but it's not PENDING_FREEOBJECTS, 373219089Spjd * push it out, since free block aggregation can only be done for 374219089Spjd * blocks of the same type (i.e., DRR_FREE records can only be 375219089Spjd * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records 376219089Spjd * can only be aggregated with other DRR_FREEOBJECTS records. 377219089Spjd */ 378235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 379235222Smm dsp->dsa_pending_op != PENDING_FREEOBJECTS) { 380286587Smav if (dump_record(dsp, NULL, 0) != 0) 381249195Smm return (SET_ERROR(EINTR)); 382235222Smm dsp->dsa_pending_op = PENDING_NONE; 383219089Spjd } 384235222Smm if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { 385219089Spjd /* 386219089Spjd * See whether this free object array can be aggregated 387219089Spjd * with pending one 388219089Spjd */ 389219089Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { 390219089Spjd drrfo->drr_numobjs += numobjs; 391219089Spjd return (0); 392219089Spjd } else { 393219089Spjd /* can't be aggregated. Push out pending record */ 394286587Smav if (dump_record(dsp, NULL, 0) != 0) 395249195Smm return (SET_ERROR(EINTR)); 396235222Smm dsp->dsa_pending_op = PENDING_NONE; 397219089Spjd } 398219089Spjd } 399219089Spjd 400168404Spjd /* write a FREEOBJECTS record */ 401235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 402235222Smm dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; 403219089Spjd drrfo->drr_firstobj = firstobj; 404219089Spjd drrfo->drr_numobjs = numobjs; 405235222Smm drrfo->drr_toguid = dsp->dsa_toguid; 406168404Spjd 407235222Smm dsp->dsa_pending_op = PENDING_FREEOBJECTS; 408219089Spjd 409168404Spjd return (0); 410168404Spjd} 411168404Spjd 412168404Spjdstatic int 413235222Smmdump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) 414168404Spjd{ 415235222Smm struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); 416219089Spjd 417168404Spjd if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) 418235222Smm return (dump_freeobjects(dsp, object, 1)); 419168404Spjd 420235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 421286587Smav if (dump_record(dsp, NULL, 0) != 0) 422249195Smm return (SET_ERROR(EINTR)); 423235222Smm dsp->dsa_pending_op = PENDING_NONE; 424219089Spjd } 425219089Spjd 426168404Spjd /* write an OBJECT record */ 427235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 428235222Smm dsp->dsa_drr->drr_type = DRR_OBJECT; 429219089Spjd drro->drr_object = object; 430219089Spjd drro->drr_type = dnp->dn_type; 431219089Spjd drro->drr_bonustype = dnp->dn_bonustype; 432219089Spjd drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 433219089Spjd drro->drr_bonuslen = dnp->dn_bonuslen; 434219089Spjd drro->drr_checksumtype = dnp->dn_checksum; 435219089Spjd drro->drr_compress = dnp->dn_compress; 436235222Smm drro->drr_toguid = dsp->dsa_toguid; 437168404Spjd 438274337Sdelphij if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 439274337Sdelphij drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) 440274337Sdelphij drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; 441274337Sdelphij 442286587Smav if (dump_record(dsp, DN_BONUS(dnp), 443286587Smav P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) { 444249195Smm return (SET_ERROR(EINTR)); 445286587Smav } 446168404Spjd 447253821Sdelphij /* Free anything past the end of the file. */ 448235222Smm if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * 449253821Sdelphij (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) 450249195Smm return (SET_ERROR(EINTR)); 451248571Smm if (dsp->dsa_err != 0) 452249195Smm return (SET_ERROR(EINTR)); 453168404Spjd return (0); 454168404Spjd} 455168404Spjd 456268075Sdelphijstatic boolean_t 457268075Sdelphijbackup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) 458268075Sdelphij{ 459268075Sdelphij if (!BP_IS_EMBEDDED(bp)) 460268075Sdelphij return (B_FALSE); 461268075Sdelphij 462268075Sdelphij /* 463268075Sdelphij * Compression function must be legacy, or explicitly enabled. 464268075Sdelphij */ 465268075Sdelphij if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && 466268075Sdelphij !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4))) 467268075Sdelphij return (B_FALSE); 468268075Sdelphij 469268075Sdelphij /* 470268075Sdelphij * Embed type must be explicitly enabled. 471268075Sdelphij */ 472268075Sdelphij switch (BPE_GET_ETYPE(bp)) { 473268075Sdelphij case BP_EMBEDDED_TYPE_DATA: 474268075Sdelphij if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) 475268075Sdelphij return (B_TRUE); 476268075Sdelphij break; 477268075Sdelphij default: 478268075Sdelphij return (B_FALSE); 479268075Sdelphij } 480268075Sdelphij return (B_FALSE); 481268075Sdelphij} 482268075Sdelphij 483286705Smav/* 484286705Smav * This is the callback function to traverse_dataset that acts as the worker 485286705Smav * thread for dmu_send_impl. 486286705Smav */ 487286705Smav/*ARGSUSED*/ 488286705Smavstatic int 489286705Smavsend_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 490286705Smav const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg) 491286705Smav{ 492286705Smav struct send_thread_arg *sta = arg; 493286705Smav struct send_block_record *record; 494286705Smav uint64_t record_size; 495286705Smav int err = 0; 496168404Spjd 497286705Smav if (sta->cancel) 498286705Smav return (SET_ERROR(EINTR)); 499286705Smav 500286705Smav if (bp == NULL) { 501286705Smav ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL); 502286705Smav return (0); 503286705Smav } else if (zb->zb_level < 0) { 504286705Smav return (0); 505286705Smav } 506286705Smav 507286705Smav record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP); 508286705Smav record->eos_marker = B_FALSE; 509286705Smav record->bp = *bp; 510286705Smav record->zb = *zb; 511286705Smav record->indblkshift = dnp->dn_indblkshift; 512286705Smav record->datablkszsec = dnp->dn_datablkszsec; 513286705Smav record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 514286705Smav bqueue_enqueue(&sta->q, record, record_size); 515286705Smav 516286705Smav return (err); 517286705Smav} 518286705Smav 519286705Smav/* 520286705Smav * This function kicks off the traverse_dataset. It also handles setting the 521286705Smav * error code of the thread in case something goes wrong, and pushes the End of 522286705Smav * Stream record when the traverse_dataset call has finished. If there is no 523286705Smav * dataset to traverse, the thread immediately pushes End of Stream marker. 524286705Smav */ 525286705Smavstatic void 526286705Smavsend_traverse_thread(void *arg) 527286705Smav{ 528286705Smav struct send_thread_arg *st_arg = arg; 529286705Smav int err; 530286705Smav struct send_block_record *data; 531286705Smav 532286705Smav if (st_arg->ds != NULL) { 533286705Smav err = traverse_dataset(st_arg->ds, st_arg->fromtxg, 534286705Smav st_arg->flags, send_cb, arg); 535286705Smav if (err != EINTR) 536286705Smav st_arg->error_code = err; 537286705Smav } 538286705Smav data = kmem_zalloc(sizeof (*data), KM_SLEEP); 539286705Smav data->eos_marker = B_TRUE; 540286705Smav bqueue_enqueue(&st_arg->q, data, 1); 541286705Smav thread_exit(); 542286705Smav} 543286705Smav 544286705Smav/* 545286705Smav * This function actually handles figuring out what kind of record needs to be 546286705Smav * dumped, reading the data (which has hopefully been prefetched), and calling 547286705Smav * the appropriate helper function. 548286705Smav */ 549168404Spjdstatic int 550286705Smavdo_dump(dmu_sendarg_t *dsa, struct send_block_record *data) 551168404Spjd{ 552286705Smav dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os); 553286705Smav const blkptr_t *bp = &data->bp; 554286705Smav const zbookmark_phys_t *zb = &data->zb; 555286705Smav uint8_t indblkshift = data->indblkshift; 556286705Smav uint16_t dblkszsec = data->datablkszsec; 557286705Smav spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 558168404Spjd dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; 559168404Spjd int err = 0; 560168404Spjd 561286705Smav ASSERT3U(zb->zb_level, >=, 0); 562168404Spjd 563219089Spjd if (zb->zb_object != DMU_META_DNODE_OBJECT && 564219089Spjd DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { 565209962Smm return (0); 566260150Sdelphij } else if (BP_IS_HOLE(bp) && 567260150Sdelphij zb->zb_object == DMU_META_DNODE_OBJECT) { 568286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 569208047Smm uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; 570286705Smav err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT); 571260150Sdelphij } else if (BP_IS_HOLE(bp)) { 572286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 573286705Smav uint64_t offset = zb->zb_blkid * span; 574286705Smav err = dump_free(dsa, zb->zb_object, offset, span); 575208047Smm } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { 576208047Smm return (0); 577208047Smm } else if (type == DMU_OT_DNODE) { 578168404Spjd int blksz = BP_GET_LSIZE(bp); 579275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 580208047Smm arc_buf_t *abuf; 581168404Spjd 582286705Smav ASSERT0(zb->zb_level); 583286705Smav 584246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 585246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 586246666Smm &aflags, zb) != 0) 587249195Smm return (SET_ERROR(EIO)); 588208047Smm 589286705Smav dnode_phys_t *blk = abuf->b_data; 590286705Smav uint64_t dnobj = zb->zb_blkid * (blksz >> DNODE_SHIFT); 591286705Smav for (int i = 0; i < blksz >> DNODE_SHIFT; i++) { 592286705Smav err = dump_dnode(dsa, dnobj + i, blk + i); 593248571Smm if (err != 0) 594168404Spjd break; 595168404Spjd } 596208047Smm (void) arc_buf_remove_ref(abuf, &abuf); 597219089Spjd } else if (type == DMU_OT_SA) { 598275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 599208047Smm arc_buf_t *abuf; 600168404Spjd int blksz = BP_GET_LSIZE(bp); 601168404Spjd 602246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 603246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 604246666Smm &aflags, zb) != 0) 605249195Smm return (SET_ERROR(EIO)); 606168404Spjd 607286705Smav err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data); 608219089Spjd (void) arc_buf_remove_ref(abuf, &abuf); 609286705Smav } else if (backup_do_embed(dsa, bp)) { 610268075Sdelphij /* it's an embedded level-0 block of a regular object */ 611286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 612286705Smav ASSERT0(zb->zb_level); 613286705Smav err = dump_write_embedded(dsa, zb->zb_object, 614268075Sdelphij zb->zb_blkid * blksz, blksz, bp); 615286705Smav } else { 616286705Smav /* it's a level-0 block of a regular object */ 617275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 618219089Spjd arc_buf_t *abuf; 619286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 620274337Sdelphij uint64_t offset; 621219089Spjd 622260183Sdelphij ASSERT0(zb->zb_level); 623246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 624246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 625246666Smm &aflags, zb) != 0) { 626228103Smm if (zfs_send_corrupt_data) { 627228103Smm /* Send a block filled with 0x"zfs badd bloc" */ 628228103Smm abuf = arc_buf_alloc(spa, blksz, &abuf, 629228103Smm ARC_BUFC_DATA); 630228103Smm uint64_t *ptr; 631228103Smm for (ptr = abuf->b_data; 632228103Smm (char *)ptr < (char *)abuf->b_data + blksz; 633228103Smm ptr++) 634286554Smav *ptr = 0x2f5baddb10cULL; 635228103Smm } else { 636249195Smm return (SET_ERROR(EIO)); 637228103Smm } 638228103Smm } 639219089Spjd 640274337Sdelphij offset = zb->zb_blkid * blksz; 641274337Sdelphij 642286705Smav if (!(dsa->dsa_featureflags & 643274337Sdelphij DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 644274337Sdelphij blksz > SPA_OLD_MAXBLOCKSIZE) { 645274337Sdelphij char *buf = abuf->b_data; 646274337Sdelphij while (blksz > 0 && err == 0) { 647274337Sdelphij int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); 648286705Smav err = dump_write(dsa, type, zb->zb_object, 649274337Sdelphij offset, n, NULL, buf); 650274337Sdelphij offset += n; 651274337Sdelphij buf += n; 652274337Sdelphij blksz -= n; 653274337Sdelphij } 654274337Sdelphij } else { 655286705Smav err = dump_write(dsa, type, zb->zb_object, 656274337Sdelphij offset, blksz, bp, abuf->b_data); 657274337Sdelphij } 658208047Smm (void) arc_buf_remove_ref(abuf, &abuf); 659168404Spjd } 660168404Spjd 661168404Spjd ASSERT(err == 0 || err == EINTR); 662168404Spjd return (err); 663168404Spjd} 664168404Spjd 665248571Smm/* 666286705Smav * Pop the new data off the queue, and free the old data. 667248571Smm */ 668286705Smavstatic struct send_block_record * 669286705Smavget_next_record(bqueue_t *bq, struct send_block_record *data) 670286705Smav{ 671286705Smav struct send_block_record *tmp = bqueue_dequeue(bq); 672286705Smav kmem_free(data, sizeof (*data)); 673286705Smav return (tmp); 674286705Smav} 675286705Smav 676286705Smav/* 677286705Smav * Actually do the bulk of the work in a zfs send. 678286705Smav * 679286705Smav * Note: Releases dp using the specified tag. 680286705Smav */ 681248571Smmstatic int 682286705Smavdmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, 683286705Smav zfs_bookmark_phys_t *ancestor_zb, boolean_t is_clone, boolean_t embedok, 684248571Smm#ifdef illumos 685274337Sdelphij boolean_t large_block_ok, int outfd, vnode_t *vp, offset_t *off) 686248571Smm#else 687274337Sdelphij boolean_t large_block_ok, int outfd, struct file *fp, offset_t *off) 688248571Smm#endif 689168404Spjd{ 690248571Smm objset_t *os; 691168404Spjd dmu_replay_record_t *drr; 692235222Smm dmu_sendarg_t *dsp; 693168404Spjd int err; 694185029Spjd uint64_t fromtxg = 0; 695268075Sdelphij uint64_t featureflags = 0; 696286705Smav struct send_thread_arg to_arg; 697168404Spjd 698286705Smav err = dmu_objset_from_ds(to_ds, &os); 699248571Smm if (err != 0) { 700248571Smm dsl_pool_rele(dp, tag); 701248571Smm return (err); 702185029Spjd } 703185029Spjd 704168404Spjd drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); 705168404Spjd drr->drr_type = DRR_BEGIN; 706168404Spjd drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; 707219089Spjd DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, 708219089Spjd DMU_SUBSTREAM); 709219089Spjd 710219089Spjd#ifdef _KERNEL 711248571Smm if (dmu_objset_type(os) == DMU_OST_ZFS) { 712219089Spjd uint64_t version; 713248571Smm if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { 714235222Smm kmem_free(drr, sizeof (dmu_replay_record_t)); 715248571Smm dsl_pool_rele(dp, tag); 716249195Smm return (SET_ERROR(EINVAL)); 717235222Smm } 718248571Smm if (version >= ZPL_VERSION_SA) { 719268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; 720219089Spjd } 721219089Spjd } 722219089Spjd#endif 723219089Spjd 724286708Smav if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) 725274337Sdelphij featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; 726268075Sdelphij if (embedok && 727268075Sdelphij spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { 728268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; 729268075Sdelphij if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 730268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; 731268075Sdelphij } 732268075Sdelphij 733268075Sdelphij DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, 734268075Sdelphij featureflags); 735268075Sdelphij 736168404Spjd drr->drr_u.drr_begin.drr_creation_time = 737286705Smav dsl_dataset_phys(to_ds)->ds_creation_time; 738248571Smm drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); 739260183Sdelphij if (is_clone) 740185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; 741286705Smav drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid; 742286705Smav if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET) 743185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; 744185029Spjd 745286705Smav if (ancestor_zb != NULL) { 746286705Smav drr->drr_u.drr_begin.drr_fromguid = 747286705Smav ancestor_zb->zbm_guid; 748286705Smav fromtxg = ancestor_zb->zbm_creation_txg; 749260183Sdelphij } 750286705Smav dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname); 751286705Smav if (!to_ds->ds_is_snapshot) { 752260183Sdelphij (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", 753260183Sdelphij sizeof (drr->drr_u.drr_begin.drr_toname)); 754248571Smm } 755185029Spjd 756235222Smm dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); 757168404Spjd 758235222Smm dsp->dsa_drr = drr; 759235222Smm dsp->dsa_outfd = outfd; 760235222Smm dsp->dsa_proc = curproc; 761235222Smm dsp->dsa_td = curthread; 762235222Smm dsp->dsa_fp = fp; 763248571Smm dsp->dsa_os = os; 764235222Smm dsp->dsa_off = off; 765286705Smav dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid; 766235222Smm dsp->dsa_pending_op = PENDING_NONE; 767286705Smav dsp->dsa_incremental = (ancestor_zb != NULL); 768268075Sdelphij dsp->dsa_featureflags = featureflags; 769235222Smm 770286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 771286705Smav list_insert_head(&to_ds->ds_sendstreams, dsp); 772286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 773235222Smm 774286705Smav dsl_dataset_long_hold(to_ds, FTAG); 775249042Smm dsl_pool_rele(dp, tag); 776249042Smm 777286587Smav if (dump_record(dsp, NULL, 0) != 0) { 778235222Smm err = dsp->dsa_err; 779235222Smm goto out; 780168404Spjd } 781168404Spjd 782286705Smav err = bqueue_init(&to_arg.q, zfs_send_queue_length, 783286705Smav offsetof(struct send_block_record, ln)); 784286705Smav to_arg.error_code = 0; 785286705Smav to_arg.cancel = B_FALSE; 786286705Smav to_arg.ds = to_ds; 787286705Smav to_arg.fromtxg = fromtxg; 788286705Smav to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH; 789286705Smav (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, curproc, 790286705Smav TS_RUN, minclsyspri); 791168404Spjd 792286705Smav struct send_block_record *to_data; 793286705Smav to_data = bqueue_dequeue(&to_arg.q); 794286705Smav 795286705Smav while (!to_data->eos_marker && err == 0) { 796286705Smav err = do_dump(dsp, to_data); 797286705Smav to_data = get_next_record(&to_arg.q, to_data); 798286705Smav if (issig(JUSTLOOKING) && issig(FORREAL)) 799286705Smav err = EINTR; 800286705Smav } 801286705Smav 802286705Smav if (err != 0) { 803286705Smav to_arg.cancel = B_TRUE; 804286705Smav while (!to_data->eos_marker) { 805286705Smav to_data = get_next_record(&to_arg.q, to_data); 806286705Smav } 807286705Smav } 808286705Smav kmem_free(to_data, sizeof (*to_data)); 809286705Smav 810286705Smav bqueue_destroy(&to_arg.q); 811286705Smav 812286705Smav if (err == 0 && to_arg.error_code != 0) 813286705Smav err = to_arg.error_code; 814286705Smav 815286705Smav if (err != 0) 816286705Smav goto out; 817286705Smav 818235222Smm if (dsp->dsa_pending_op != PENDING_NONE) 819286587Smav if (dump_record(dsp, NULL, 0) != 0) 820249195Smm err = SET_ERROR(EINTR); 821219089Spjd 822248571Smm if (err != 0) { 823248571Smm if (err == EINTR && dsp->dsa_err != 0) 824235222Smm err = dsp->dsa_err; 825235222Smm goto out; 826168404Spjd } 827168404Spjd 828168404Spjd bzero(drr, sizeof (dmu_replay_record_t)); 829168404Spjd drr->drr_type = DRR_END; 830235222Smm drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; 831235222Smm drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; 832168404Spjd 833286705Smav if (dump_record(dsp, NULL, 0) != 0) 834235222Smm err = dsp->dsa_err; 835168404Spjd 836235222Smmout: 837286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 838286705Smav list_remove(&to_ds->ds_sendstreams, dsp); 839286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 840235222Smm 841168404Spjd kmem_free(drr, sizeof (dmu_replay_record_t)); 842235222Smm kmem_free(dsp, sizeof (dmu_sendarg_t)); 843168404Spjd 844286705Smav dsl_dataset_long_rele(to_ds, FTAG); 845248571Smm 846235222Smm return (err); 847168404Spjd} 848168404Spjd 849228103Smmint 850248571Smmdmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, 851274337Sdelphij boolean_t embedok, boolean_t large_block_ok, 852248571Smm#ifdef illumos 853274337Sdelphij int outfd, vnode_t *vp, offset_t *off) 854248571Smm#else 855274337Sdelphij int outfd, struct file *fp, offset_t *off) 856248571Smm#endif 857228103Smm{ 858248571Smm dsl_pool_t *dp; 859248571Smm dsl_dataset_t *ds; 860248571Smm dsl_dataset_t *fromds = NULL; 861248571Smm int err; 862248571Smm 863248571Smm err = dsl_pool_hold(pool, FTAG, &dp); 864248571Smm if (err != 0) 865248571Smm return (err); 866248571Smm 867248571Smm err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); 868248571Smm if (err != 0) { 869248571Smm dsl_pool_rele(dp, FTAG); 870248571Smm return (err); 871248571Smm } 872248571Smm 873248571Smm if (fromsnap != 0) { 874260183Sdelphij zfs_bookmark_phys_t zb; 875260183Sdelphij boolean_t is_clone; 876260183Sdelphij 877248571Smm err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); 878248571Smm if (err != 0) { 879248571Smm dsl_dataset_rele(ds, FTAG); 880248571Smm dsl_pool_rele(dp, FTAG); 881248571Smm return (err); 882248571Smm } 883260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 884260183Sdelphij err = SET_ERROR(EXDEV); 885275782Sdelphij zb.zbm_creation_time = 886275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 887275782Sdelphij zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; 888275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 889260183Sdelphij is_clone = (fromds->ds_dir != ds->ds_dir); 890260183Sdelphij dsl_dataset_rele(fromds, FTAG); 891274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 892274337Sdelphij embedok, large_block_ok, outfd, fp, off); 893260183Sdelphij } else { 894274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 895274337Sdelphij embedok, large_block_ok, outfd, fp, off); 896248571Smm } 897260183Sdelphij dsl_dataset_rele(ds, FTAG); 898260183Sdelphij return (err); 899248571Smm} 900248571Smm 901248571Smmint 902274337Sdelphijdmu_send(const char *tosnap, const char *fromsnap, 903274337Sdelphij boolean_t embedok, boolean_t large_block_ok, 904248571Smm#ifdef illumos 905248571Smm int outfd, vnode_t *vp, offset_t *off) 906248571Smm#else 907248571Smm int outfd, struct file *fp, offset_t *off) 908248571Smm#endif 909248571Smm{ 910248571Smm dsl_pool_t *dp; 911248571Smm dsl_dataset_t *ds; 912248571Smm int err; 913260183Sdelphij boolean_t owned = B_FALSE; 914248571Smm 915260183Sdelphij if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) 916249195Smm return (SET_ERROR(EINVAL)); 917248571Smm 918248571Smm err = dsl_pool_hold(tosnap, FTAG, &dp); 919248571Smm if (err != 0) 920248571Smm return (err); 921248571Smm 922260183Sdelphij if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { 923260183Sdelphij /* 924260183Sdelphij * We are sending a filesystem or volume. Ensure 925260183Sdelphij * that it doesn't change by owning the dataset. 926260183Sdelphij */ 927260183Sdelphij err = dsl_dataset_own(dp, tosnap, FTAG, &ds); 928260183Sdelphij owned = B_TRUE; 929260183Sdelphij } else { 930260183Sdelphij err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); 931260183Sdelphij } 932248571Smm if (err != 0) { 933248571Smm dsl_pool_rele(dp, FTAG); 934248571Smm return (err); 935248571Smm } 936248571Smm 937248571Smm if (fromsnap != NULL) { 938260183Sdelphij zfs_bookmark_phys_t zb; 939260183Sdelphij boolean_t is_clone = B_FALSE; 940260183Sdelphij int fsnamelen = strchr(tosnap, '@') - tosnap; 941260183Sdelphij 942260183Sdelphij /* 943260183Sdelphij * If the fromsnap is in a different filesystem, then 944260183Sdelphij * mark the send stream as a clone. 945260183Sdelphij */ 946260183Sdelphij if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || 947260183Sdelphij (fromsnap[fsnamelen] != '@' && 948260183Sdelphij fromsnap[fsnamelen] != '#')) { 949260183Sdelphij is_clone = B_TRUE; 950260183Sdelphij } 951260183Sdelphij 952260183Sdelphij if (strchr(fromsnap, '@')) { 953260183Sdelphij dsl_dataset_t *fromds; 954260183Sdelphij err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); 955260183Sdelphij if (err == 0) { 956260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 957260183Sdelphij err = SET_ERROR(EXDEV); 958260183Sdelphij zb.zbm_creation_time = 959275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 960260183Sdelphij zb.zbm_creation_txg = 961275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_txg; 962275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 963260183Sdelphij is_clone = (ds->ds_dir != fromds->ds_dir); 964260183Sdelphij dsl_dataset_rele(fromds, FTAG); 965260183Sdelphij } 966260183Sdelphij } else { 967260183Sdelphij err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); 968260183Sdelphij } 969248571Smm if (err != 0) { 970248571Smm dsl_dataset_rele(ds, FTAG); 971248571Smm dsl_pool_rele(dp, FTAG); 972248571Smm return (err); 973248571Smm } 974274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 975274337Sdelphij embedok, large_block_ok, outfd, fp, off); 976260183Sdelphij } else { 977274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 978274337Sdelphij embedok, large_block_ok, outfd, fp, off); 979248571Smm } 980260183Sdelphij if (owned) 981260183Sdelphij dsl_dataset_disown(ds, FTAG); 982260183Sdelphij else 983260183Sdelphij dsl_dataset_rele(ds, FTAG); 984260183Sdelphij return (err); 985248571Smm} 986248571Smm 987286683Smavstatic int 988286683Smavdmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t size, 989286683Smav uint64_t *sizep) 990286683Smav{ 991286683Smav int err; 992286683Smav /* 993286683Smav * Assume that space (both on-disk and in-stream) is dominated by 994286683Smav * data. We will adjust for indirect blocks and the copies property, 995286683Smav * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). 996286683Smav */ 997286683Smav 998286683Smav /* 999286683Smav * Subtract out approximate space used by indirect blocks. 1000286683Smav * Assume most space is used by data blocks (non-indirect, non-dnode). 1001286683Smav * Assume all blocks are recordsize. Assume ditto blocks and 1002286683Smav * internal fragmentation counter out compression. 1003286683Smav * 1004286683Smav * Therefore, space used by indirect blocks is sizeof(blkptr_t) per 1005286683Smav * block, which we observe in practice. 1006286683Smav */ 1007286683Smav uint64_t recordsize; 1008286683Smav err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); 1009286683Smav if (err != 0) 1010286683Smav return (err); 1011286683Smav size -= size / recordsize * sizeof (blkptr_t); 1012286683Smav 1013286683Smav /* Add in the space for the record associated with each block. */ 1014286683Smav size += size / recordsize * sizeof (dmu_replay_record_t); 1015286683Smav 1016286683Smav *sizep = size; 1017286683Smav 1018286683Smav return (0); 1019286683Smav} 1020286683Smav 1021248571Smmint 1022248571Smmdmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) 1023248571Smm{ 1024228103Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1025228103Smm int err; 1026228103Smm uint64_t size; 1027228103Smm 1028248571Smm ASSERT(dsl_pool_config_held(dp)); 1029248571Smm 1030228103Smm /* tosnap must be a snapshot */ 1031286575Smav if (!ds->ds_is_snapshot) 1032249195Smm return (SET_ERROR(EINVAL)); 1033228103Smm 1034284301Savg /* fromsnap, if provided, must be a snapshot */ 1035286575Smav if (fromds != NULL && !fromds->ds_is_snapshot) 1036284301Savg return (SET_ERROR(EINVAL)); 1037284301Savg 1038248571Smm /* 1039248571Smm * fromsnap must be an earlier snapshot from the same fs as tosnap, 1040248571Smm * or the origin's fs. 1041248571Smm */ 1042260183Sdelphij if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) 1043249195Smm return (SET_ERROR(EXDEV)); 1044228103Smm 1045228103Smm /* Get uncompressed size estimate of changed data. */ 1046228103Smm if (fromds == NULL) { 1047275782Sdelphij size = dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1048228103Smm } else { 1049228103Smm uint64_t used, comp; 1050228103Smm err = dsl_dataset_space_written(fromds, ds, 1051228103Smm &used, &comp, &size); 1052248571Smm if (err != 0) 1053228103Smm return (err); 1054228103Smm } 1055228103Smm 1056286683Smav err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); 1057286683Smav return (err); 1058286683Smav} 1059228103Smm 1060286683Smav/* 1061286683Smav * Simple callback used to traverse the blocks of a snapshot and sum their 1062286683Smav * uncompressed size 1063286683Smav */ 1064286683Smav/* ARGSUSED */ 1065286683Smavstatic int 1066286683Smavdmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1067286683Smav const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1068286683Smav{ 1069286683Smav uint64_t *spaceptr = arg; 1070286683Smav if (bp != NULL && !BP_IS_HOLE(bp)) { 1071286683Smav *spaceptr += BP_GET_UCSIZE(bp); 1072286683Smav } 1073286683Smav return (0); 1074286683Smav} 1075286683Smav 1076286683Smav/* 1077286683Smav * Given a desination snapshot and a TXG, calculate the approximate size of a 1078286683Smav * send stream sent from that TXG. from_txg may be zero, indicating that the 1079286683Smav * whole snapshot will be sent. 1080286683Smav */ 1081286683Smavint 1082286683Smavdmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, 1083286683Smav uint64_t *sizep) 1084286683Smav{ 1085286683Smav dsl_pool_t *dp = ds->ds_dir->dd_pool; 1086286683Smav int err; 1087286683Smav uint64_t size = 0; 1088286683Smav 1089286683Smav ASSERT(dsl_pool_config_held(dp)); 1090286683Smav 1091286683Smav /* tosnap must be a snapshot */ 1092286683Smav if (!dsl_dataset_is_snapshot(ds)) 1093286683Smav return (SET_ERROR(EINVAL)); 1094286683Smav 1095286683Smav /* verify that from_txg is before the provided snapshot was taken */ 1096286683Smav if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { 1097286683Smav return (SET_ERROR(EXDEV)); 1098286683Smav } 1099286683Smav 1100228103Smm /* 1101286683Smav * traverse the blocks of the snapshot with birth times after 1102286683Smav * from_txg, summing their uncompressed size 1103228103Smm */ 1104286683Smav err = traverse_dataset(ds, from_txg, TRAVERSE_POST, 1105286683Smav dmu_calculate_send_traversal, &size); 1106286683Smav if (err) 1107228103Smm return (err); 1108228103Smm 1109286683Smav err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); 1110286683Smav return (err); 1111228103Smm} 1112228103Smm 1113248571Smmtypedef struct dmu_recv_begin_arg { 1114248571Smm const char *drba_origin; 1115248571Smm dmu_recv_cookie_t *drba_cookie; 1116248571Smm cred_t *drba_cred; 1117253820Sdelphij uint64_t drba_snapobj; 1118248571Smm} dmu_recv_begin_arg_t; 1119168404Spjd 1120168404Spjdstatic int 1121248571Smmrecv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, 1122248571Smm uint64_t fromguid) 1123168404Spjd{ 1124185029Spjd uint64_t val; 1125248571Smm int error; 1126248571Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1127185029Spjd 1128248571Smm /* temporary clone name must not exist */ 1129248571Smm error = zap_lookup(dp->dp_meta_objset, 1130275782Sdelphij dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, 1131248571Smm 8, 1, &val); 1132248571Smm if (error != ENOENT) 1133248571Smm return (error == 0 ? EBUSY : error); 1134248571Smm 1135219089Spjd /* new snapshot name must not exist */ 1136248571Smm error = zap_lookup(dp->dp_meta_objset, 1137275782Sdelphij dsl_dataset_phys(ds)->ds_snapnames_zapobj, 1138275782Sdelphij drba->drba_cookie->drc_tosnap, 8, 1, &val); 1139248571Smm if (error != ENOENT) 1140248571Smm return (error == 0 ? EEXIST : error); 1141168404Spjd 1142264835Sdelphij /* 1143264835Sdelphij * Check snapshot limit before receiving. We'll recheck again at the 1144264835Sdelphij * end, but might as well abort before receiving if we're already over 1145264835Sdelphij * the limit. 1146264835Sdelphij * 1147264835Sdelphij * Note that we do not check the file system limit with 1148264835Sdelphij * dsl_dir_fscount_check because the temporary %clones don't count 1149264835Sdelphij * against that limit. 1150264835Sdelphij */ 1151264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, 1152264835Sdelphij NULL, drba->drba_cred); 1153264835Sdelphij if (error != 0) 1154264835Sdelphij return (error); 1155264835Sdelphij 1156248571Smm if (fromguid != 0) { 1157253820Sdelphij dsl_dataset_t *snap; 1158275782Sdelphij uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1159253820Sdelphij 1160253820Sdelphij /* Find snapshot in this dir that matches fromguid. */ 1161253820Sdelphij while (obj != 0) { 1162253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 1163253820Sdelphij &snap); 1164253820Sdelphij if (error != 0) 1165253820Sdelphij return (SET_ERROR(ENODEV)); 1166253820Sdelphij if (snap->ds_dir != ds->ds_dir) { 1167253820Sdelphij dsl_dataset_rele(snap, FTAG); 1168253820Sdelphij return (SET_ERROR(ENODEV)); 1169253820Sdelphij } 1170275782Sdelphij if (dsl_dataset_phys(snap)->ds_guid == fromguid) 1171253820Sdelphij break; 1172275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 1173253820Sdelphij dsl_dataset_rele(snap, FTAG); 1174253820Sdelphij } 1175253820Sdelphij if (obj == 0) 1176249195Smm return (SET_ERROR(ENODEV)); 1177168404Spjd 1178253820Sdelphij if (drba->drba_cookie->drc_force) { 1179253820Sdelphij drba->drba_snapobj = obj; 1180253820Sdelphij } else { 1181253820Sdelphij /* 1182253820Sdelphij * If we are not forcing, there must be no 1183253820Sdelphij * changes since fromsnap. 1184253820Sdelphij */ 1185253820Sdelphij if (dsl_dataset_modified_since_snap(ds, snap)) { 1186219089Spjd dsl_dataset_rele(snap, FTAG); 1187253820Sdelphij return (SET_ERROR(ETXTBSY)); 1188219089Spjd } 1189253820Sdelphij drba->drba_snapobj = ds->ds_prev->ds_object; 1190219089Spjd } 1191253820Sdelphij 1192253820Sdelphij dsl_dataset_rele(snap, FTAG); 1193219089Spjd } else { 1194283525Savg /* if full, then must be forced */ 1195283525Savg if (!drba->drba_cookie->drc_force) 1196283525Savg return (SET_ERROR(EEXIST)); 1197283525Savg /* start from $ORIGIN@$ORIGIN, if supported */ 1198283525Savg drba->drba_snapobj = dp->dp_origin_snap != NULL ? 1199283525Savg dp->dp_origin_snap->ds_object : 0; 1200219089Spjd } 1201219089Spjd 1202248571Smm return (0); 1203168404Spjd 1204168404Spjd} 1205168404Spjd 1206248571Smmstatic int 1207248571Smmdmu_recv_begin_check(void *arg, dmu_tx_t *tx) 1208248571Smm{ 1209248571Smm dmu_recv_begin_arg_t *drba = arg; 1210248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1211248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1212248571Smm uint64_t fromguid = drrb->drr_fromguid; 1213248571Smm int flags = drrb->drr_flags; 1214248571Smm int error; 1215268075Sdelphij uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1216248571Smm dsl_dataset_t *ds; 1217248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1218248571Smm 1219248571Smm /* already checked */ 1220248571Smm ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1221248571Smm 1222248571Smm if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1223248571Smm DMU_COMPOUNDSTREAM || 1224248571Smm drrb->drr_type >= DMU_OST_NUMTYPES || 1225248571Smm ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) 1226249195Smm return (SET_ERROR(EINVAL)); 1227248571Smm 1228248571Smm /* Verify pool version supports SA if SA_SPILL feature set */ 1229268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1230268075Sdelphij spa_version(dp->dp_spa) < SPA_VERSION_SA) 1231249195Smm return (SET_ERROR(ENOTSUP)); 1232248571Smm 1233268075Sdelphij /* 1234268075Sdelphij * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1235268075Sdelphij * record to a plan WRITE record, so the pool must have the 1236268075Sdelphij * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1237268075Sdelphij * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1238268075Sdelphij */ 1239268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1240268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1241268075Sdelphij return (SET_ERROR(ENOTSUP)); 1242268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && 1243268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1244268075Sdelphij return (SET_ERROR(ENOTSUP)); 1245268075Sdelphij 1246274337Sdelphij /* 1247274337Sdelphij * The receiving code doesn't know how to translate large blocks 1248274337Sdelphij * to smaller ones, so the pool must have the LARGE_BLOCKS 1249274337Sdelphij * feature enabled if the stream has LARGE_BLOCKS. 1250274337Sdelphij */ 1251274337Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 1252274337Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) 1253274337Sdelphij return (SET_ERROR(ENOTSUP)); 1254274337Sdelphij 1255248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1256248571Smm if (error == 0) { 1257248571Smm /* target fs already exists; recv into temp clone */ 1258248571Smm 1259248571Smm /* Can't recv a clone into an existing fs */ 1260248571Smm if (flags & DRR_FLAG_CLONE) { 1261248571Smm dsl_dataset_rele(ds, FTAG); 1262249195Smm return (SET_ERROR(EINVAL)); 1263248571Smm } 1264248571Smm 1265248571Smm error = recv_begin_check_existing_impl(drba, ds, fromguid); 1266248571Smm dsl_dataset_rele(ds, FTAG); 1267248571Smm } else if (error == ENOENT) { 1268248571Smm /* target fs does not exist; must be a full backup or clone */ 1269248571Smm char buf[MAXNAMELEN]; 1270248571Smm 1271248571Smm /* 1272248571Smm * If it's a non-clone incremental, we are missing the 1273248571Smm * target fs, so fail the recv. 1274248571Smm */ 1275286705Smav if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || 1276286705Smav drba->drba_origin)) 1277249195Smm return (SET_ERROR(ENOENT)); 1278248571Smm 1279248571Smm /* Open the parent of tofs */ 1280248571Smm ASSERT3U(strlen(tofs), <, MAXNAMELEN); 1281248571Smm (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); 1282248571Smm error = dsl_dataset_hold(dp, buf, FTAG, &ds); 1283248571Smm if (error != 0) 1284248571Smm return (error); 1285248571Smm 1286264835Sdelphij /* 1287264835Sdelphij * Check filesystem and snapshot limits before receiving. We'll 1288264835Sdelphij * recheck snapshot limits again at the end (we create the 1289264835Sdelphij * filesystems and increment those counts during begin_sync). 1290264835Sdelphij */ 1291264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1292264835Sdelphij ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); 1293264835Sdelphij if (error != 0) { 1294264835Sdelphij dsl_dataset_rele(ds, FTAG); 1295264835Sdelphij return (error); 1296264835Sdelphij } 1297264835Sdelphij 1298264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1299264835Sdelphij ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); 1300264835Sdelphij if (error != 0) { 1301264835Sdelphij dsl_dataset_rele(ds, FTAG); 1302264835Sdelphij return (error); 1303264835Sdelphij } 1304264835Sdelphij 1305248571Smm if (drba->drba_origin != NULL) { 1306248571Smm dsl_dataset_t *origin; 1307248571Smm error = dsl_dataset_hold(dp, drba->drba_origin, 1308248571Smm FTAG, &origin); 1309248571Smm if (error != 0) { 1310248571Smm dsl_dataset_rele(ds, FTAG); 1311248571Smm return (error); 1312248571Smm } 1313286575Smav if (!origin->ds_is_snapshot) { 1314248571Smm dsl_dataset_rele(origin, FTAG); 1315248571Smm dsl_dataset_rele(ds, FTAG); 1316249195Smm return (SET_ERROR(EINVAL)); 1317248571Smm } 1318275782Sdelphij if (dsl_dataset_phys(origin)->ds_guid != fromguid) { 1319248571Smm dsl_dataset_rele(origin, FTAG); 1320248571Smm dsl_dataset_rele(ds, FTAG); 1321249195Smm return (SET_ERROR(ENODEV)); 1322248571Smm } 1323248571Smm dsl_dataset_rele(origin, FTAG); 1324248571Smm } 1325248571Smm dsl_dataset_rele(ds, FTAG); 1326248571Smm error = 0; 1327248571Smm } 1328248571Smm return (error); 1329248571Smm} 1330248571Smm 1331168404Spjdstatic void 1332248571Smmdmu_recv_begin_sync(void *arg, dmu_tx_t *tx) 1333168404Spjd{ 1334248571Smm dmu_recv_begin_arg_t *drba = arg; 1335248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1336248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1337248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1338248571Smm dsl_dataset_t *ds, *newds; 1339185029Spjd uint64_t dsobj; 1340248571Smm int error; 1341248571Smm uint64_t crflags; 1342168404Spjd 1343248571Smm crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? 1344248571Smm DS_FLAG_CI_DATASET : 0; 1345168404Spjd 1346248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1347248571Smm if (error == 0) { 1348248571Smm /* create temporary clone */ 1349253820Sdelphij dsl_dataset_t *snap = NULL; 1350253820Sdelphij if (drba->drba_snapobj != 0) { 1351253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, 1352253820Sdelphij drba->drba_snapobj, FTAG, &snap)); 1353253820Sdelphij } 1354248571Smm dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, 1355253820Sdelphij snap, crflags, drba->drba_cred, tx); 1356282632Savg if (drba->drba_snapobj != 0) 1357282632Savg dsl_dataset_rele(snap, FTAG); 1358248571Smm dsl_dataset_rele(ds, FTAG); 1359248571Smm } else { 1360248571Smm dsl_dir_t *dd; 1361248571Smm const char *tail; 1362248571Smm dsl_dataset_t *origin = NULL; 1363248571Smm 1364248571Smm VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); 1365248571Smm 1366248571Smm if (drba->drba_origin != NULL) { 1367248571Smm VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, 1368248571Smm FTAG, &origin)); 1369248571Smm } 1370248571Smm 1371248571Smm /* Create new dataset. */ 1372248571Smm dsobj = dsl_dataset_create_sync(dd, 1373248571Smm strrchr(tofs, '/') + 1, 1374248571Smm origin, crflags, drba->drba_cred, tx); 1375248571Smm if (origin != NULL) 1376248571Smm dsl_dataset_rele(origin, FTAG); 1377248571Smm dsl_dir_rele(dd, FTAG); 1378248571Smm drba->drba_cookie->drc_newfs = B_TRUE; 1379248571Smm } 1380248571Smm VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); 1381248571Smm 1382248571Smm dmu_buf_will_dirty(newds->ds_dbuf, tx); 1383275782Sdelphij dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; 1384248571Smm 1385219089Spjd /* 1386219089Spjd * If we actually created a non-clone, we need to create the 1387219089Spjd * objset in our new dataset. 1388219089Spjd */ 1389248571Smm if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { 1390219089Spjd (void) dmu_objset_create_impl(dp->dp_spa, 1391248571Smm newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); 1392219089Spjd } 1393168404Spjd 1394248571Smm drba->drba_cookie->drc_ds = newds; 1395185029Spjd 1396248571Smm spa_history_log_internal_ds(newds, "receive", tx, ""); 1397168404Spjd} 1398168404Spjd 1399185029Spjd/* 1400185029Spjd * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() 1401185029Spjd * succeeds; otherwise we will leak the holds on the datasets. 1402185029Spjd */ 1403185029Spjdint 1404248571Smmdmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, 1405248571Smm boolean_t force, char *origin, dmu_recv_cookie_t *drc) 1406168404Spjd{ 1407248571Smm dmu_recv_begin_arg_t drba = { 0 }; 1408248571Smm dmu_replay_record_t *drr; 1409168404Spjd 1410185029Spjd bzero(drc, sizeof (dmu_recv_cookie_t)); 1411185029Spjd drc->drc_drrb = drrb; 1412185029Spjd drc->drc_tosnap = tosnap; 1413248571Smm drc->drc_tofs = tofs; 1414185029Spjd drc->drc_force = force; 1415264835Sdelphij drc->drc_cred = CRED(); 1416168404Spjd 1417248571Smm if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) 1418248571Smm drc->drc_byteswap = B_TRUE; 1419248571Smm else if (drrb->drr_magic != DMU_BACKUP_MAGIC) 1420249195Smm return (SET_ERROR(EINVAL)); 1421168404Spjd 1422248571Smm drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); 1423248571Smm drr->drr_type = DRR_BEGIN; 1424248571Smm drr->drr_u.drr_begin = *drc->drc_drrb; 1425248571Smm if (drc->drc_byteswap) { 1426248571Smm fletcher_4_incremental_byteswap(drr, 1427248571Smm sizeof (dmu_replay_record_t), &drc->drc_cksum); 1428248571Smm } else { 1429248571Smm fletcher_4_incremental_native(drr, 1430248571Smm sizeof (dmu_replay_record_t), &drc->drc_cksum); 1431248571Smm } 1432248571Smm kmem_free(drr, sizeof (dmu_replay_record_t)); 1433219089Spjd 1434248571Smm if (drc->drc_byteswap) { 1435248571Smm drrb->drr_magic = BSWAP_64(drrb->drr_magic); 1436248571Smm drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); 1437248571Smm drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); 1438248571Smm drrb->drr_type = BSWAP_32(drrb->drr_type); 1439248571Smm drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); 1440248571Smm drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); 1441248571Smm } 1442168404Spjd 1443248571Smm drba.drba_origin = origin; 1444248571Smm drba.drba_cookie = drc; 1445248571Smm drba.drba_cred = CRED(); 1446219089Spjd 1447248571Smm return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, 1448268473Sdelphij &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1449168404Spjd} 1450168404Spjd 1451286705Smavstruct receive_record_arg { 1452286705Smav dmu_replay_record_t header; 1453286705Smav void *payload; /* Pointer to a buffer containing the payload */ 1454286705Smav /* 1455286705Smav * If the record is a write, pointer to the arc_buf_t containing the 1456286705Smav * payload. 1457286705Smav */ 1458286705Smav arc_buf_t *write_buf; 1459286705Smav int payload_size; 1460286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 1461286705Smav bqueue_node_t node; 1462286705Smav}; 1463286705Smav 1464286705Smavstruct receive_writer_arg { 1465286587Smav objset_t *os; 1466286705Smav boolean_t byteswap; 1467286705Smav bqueue_t q; 1468286705Smav /* 1469286705Smav * These three args are used to signal to the main thread that we're 1470286705Smav * done. 1471286705Smav */ 1472286705Smav kmutex_t mutex; 1473286705Smav kcondvar_t cv; 1474286705Smav boolean_t done; 1475185029Spjd int err; 1476286705Smav /* A map from guid to dataset to help handle dedup'd streams. */ 1477286705Smav avl_tree_t *guid_to_ds_map; 1478286705Smav}; 1479286705Smav 1480286705Smavstruct receive_arg { 1481286705Smav objset_t *os; 1482185029Spjd kthread_t *td; 1483185029Spjd struct file *fp; 1484286705Smav uint64_t voff; /* The current offset in the stream */ 1485286705Smav /* 1486286705Smav * A record that has had its payload read in, but hasn't yet been handed 1487286705Smav * off to the worker thread. 1488286705Smav */ 1489286705Smav struct receive_record_arg *rrd; 1490286705Smav /* A record that has had its header read in, but not its payload. */ 1491286705Smav struct receive_record_arg *next_rrd; 1492185029Spjd zio_cksum_t cksum; 1493286587Smav zio_cksum_t prev_cksum; 1494286705Smav int err; 1495286705Smav boolean_t byteswap; 1496286705Smav /* Sorted list of objects not to issue prefetches for. */ 1497286705Smav list_t ignore_obj_list; 1498286705Smav}; 1499286587Smav 1500286705Smavstruct receive_ign_obj_node { 1501286705Smav list_node_t node; 1502286705Smav uint64_t object; 1503185029Spjd}; 1504185029Spjd 1505219089Spjdtypedef struct guid_map_entry { 1506219089Spjd uint64_t guid; 1507219089Spjd dsl_dataset_t *gme_ds; 1508219089Spjd avl_node_t avlnode; 1509219089Spjd} guid_map_entry_t; 1510219089Spjd 1511168404Spjdstatic int 1512219089Spjdguid_compare(const void *arg1, const void *arg2) 1513168404Spjd{ 1514219089Spjd const guid_map_entry_t *gmep1 = arg1; 1515219089Spjd const guid_map_entry_t *gmep2 = arg2; 1516219089Spjd 1517219089Spjd if (gmep1->guid < gmep2->guid) 1518219089Spjd return (-1); 1519219089Spjd else if (gmep1->guid > gmep2->guid) 1520219089Spjd return (1); 1521219089Spjd return (0); 1522219089Spjd} 1523219089Spjd 1524219089Spjdstatic void 1525219089Spjdfree_guid_map_onexit(void *arg) 1526219089Spjd{ 1527219089Spjd avl_tree_t *ca = arg; 1528219089Spjd void *cookie = NULL; 1529219089Spjd guid_map_entry_t *gmep; 1530219089Spjd 1531219089Spjd while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { 1532248571Smm dsl_dataset_long_rele(gmep->gme_ds, gmep); 1533249196Smm dsl_dataset_rele(gmep->gme_ds, gmep); 1534219089Spjd kmem_free(gmep, sizeof (guid_map_entry_t)); 1535219089Spjd } 1536219089Spjd avl_destroy(ca); 1537219089Spjd kmem_free(ca, sizeof (avl_tree_t)); 1538219089Spjd} 1539219089Spjd 1540219089Spjdstatic int 1541286705Smavrestore_bytes(struct receive_arg *ra, void *buf, int len, off_t off, ssize_t *resid) 1542219089Spjd{ 1543168404Spjd struct uio auio; 1544168404Spjd struct iovec aiov; 1545168404Spjd int error; 1546168404Spjd 1547168404Spjd aiov.iov_base = buf; 1548168404Spjd aiov.iov_len = len; 1549168404Spjd auio.uio_iov = &aiov; 1550168404Spjd auio.uio_iovcnt = 1; 1551168404Spjd auio.uio_resid = len; 1552169170Spjd auio.uio_segflg = UIO_SYSSPACE; 1553168404Spjd auio.uio_rw = UIO_READ; 1554168404Spjd auio.uio_offset = off; 1555168404Spjd auio.uio_td = ra->td; 1556168404Spjd#ifdef _KERNEL 1557168404Spjd error = fo_read(ra->fp, &auio, ra->td->td_ucred, FOF_OFFSET, ra->td); 1558168404Spjd#else 1559168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 1560168404Spjd error = EOPNOTSUPP; 1561168404Spjd#endif 1562168404Spjd *resid = auio.uio_resid; 1563168404Spjd return (error); 1564168404Spjd} 1565168404Spjd 1566286587Smavstatic int 1567286705Smavreceive_read(struct receive_arg *ra, int len, void *buf) 1568168404Spjd{ 1569185029Spjd int done = 0; 1570168404Spjd 1571168404Spjd /* some things will require 8-byte alignment, so everything must */ 1572240415Smm ASSERT0(len % 8); 1573168404Spjd 1574185029Spjd while (done < len) { 1575219089Spjd ssize_t resid; 1576168404Spjd 1577272601Sdelphij ra->err = restore_bytes(ra, buf + done, 1578185029Spjd len - done, ra->voff, &resid); 1579168404Spjd 1580185029Spjd if (resid == len - done) 1581249195Smm ra->err = SET_ERROR(EINVAL); 1582185029Spjd ra->voff += len - done - resid; 1583185029Spjd done = len - resid; 1584248571Smm if (ra->err != 0) 1585286587Smav return (ra->err); 1586168404Spjd } 1587168404Spjd 1588185029Spjd ASSERT3U(done, ==, len); 1589286587Smav return (0); 1590168404Spjd} 1591168404Spjd 1592168404Spjdstatic void 1593286587Smavbyteswap_record(dmu_replay_record_t *drr) 1594168404Spjd{ 1595168404Spjd#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) 1596168404Spjd#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) 1597168404Spjd drr->drr_type = BSWAP_32(drr->drr_type); 1598185029Spjd drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); 1599286587Smav 1600168404Spjd switch (drr->drr_type) { 1601168404Spjd case DRR_BEGIN: 1602168404Spjd DO64(drr_begin.drr_magic); 1603219089Spjd DO64(drr_begin.drr_versioninfo); 1604168404Spjd DO64(drr_begin.drr_creation_time); 1605168404Spjd DO32(drr_begin.drr_type); 1606185029Spjd DO32(drr_begin.drr_flags); 1607168404Spjd DO64(drr_begin.drr_toguid); 1608168404Spjd DO64(drr_begin.drr_fromguid); 1609168404Spjd break; 1610168404Spjd case DRR_OBJECT: 1611168404Spjd DO64(drr_object.drr_object); 1612168404Spjd DO32(drr_object.drr_type); 1613168404Spjd DO32(drr_object.drr_bonustype); 1614168404Spjd DO32(drr_object.drr_blksz); 1615168404Spjd DO32(drr_object.drr_bonuslen); 1616219089Spjd DO64(drr_object.drr_toguid); 1617168404Spjd break; 1618168404Spjd case DRR_FREEOBJECTS: 1619168404Spjd DO64(drr_freeobjects.drr_firstobj); 1620168404Spjd DO64(drr_freeobjects.drr_numobjs); 1621219089Spjd DO64(drr_freeobjects.drr_toguid); 1622168404Spjd break; 1623168404Spjd case DRR_WRITE: 1624168404Spjd DO64(drr_write.drr_object); 1625168404Spjd DO32(drr_write.drr_type); 1626168404Spjd DO64(drr_write.drr_offset); 1627168404Spjd DO64(drr_write.drr_length); 1628219089Spjd DO64(drr_write.drr_toguid); 1629286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); 1630219089Spjd DO64(drr_write.drr_key.ddk_prop); 1631168404Spjd break; 1632219089Spjd case DRR_WRITE_BYREF: 1633219089Spjd DO64(drr_write_byref.drr_object); 1634219089Spjd DO64(drr_write_byref.drr_offset); 1635219089Spjd DO64(drr_write_byref.drr_length); 1636219089Spjd DO64(drr_write_byref.drr_toguid); 1637219089Spjd DO64(drr_write_byref.drr_refguid); 1638219089Spjd DO64(drr_write_byref.drr_refobject); 1639219089Spjd DO64(drr_write_byref.drr_refoffset); 1640286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. 1641286587Smav drr_key.ddk_cksum); 1642219089Spjd DO64(drr_write_byref.drr_key.ddk_prop); 1643219089Spjd break; 1644268075Sdelphij case DRR_WRITE_EMBEDDED: 1645268075Sdelphij DO64(drr_write_embedded.drr_object); 1646268075Sdelphij DO64(drr_write_embedded.drr_offset); 1647268075Sdelphij DO64(drr_write_embedded.drr_length); 1648268075Sdelphij DO64(drr_write_embedded.drr_toguid); 1649268075Sdelphij DO32(drr_write_embedded.drr_lsize); 1650268075Sdelphij DO32(drr_write_embedded.drr_psize); 1651268075Sdelphij break; 1652168404Spjd case DRR_FREE: 1653168404Spjd DO64(drr_free.drr_object); 1654168404Spjd DO64(drr_free.drr_offset); 1655168404Spjd DO64(drr_free.drr_length); 1656219089Spjd DO64(drr_free.drr_toguid); 1657168404Spjd break; 1658219089Spjd case DRR_SPILL: 1659219089Spjd DO64(drr_spill.drr_object); 1660219089Spjd DO64(drr_spill.drr_length); 1661219089Spjd DO64(drr_spill.drr_toguid); 1662219089Spjd break; 1663168404Spjd case DRR_END: 1664219089Spjd DO64(drr_end.drr_toguid); 1665286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); 1666168404Spjd break; 1667168404Spjd } 1668286587Smav 1669286587Smav if (drr->drr_type != DRR_BEGIN) { 1670286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); 1671286587Smav } 1672286587Smav 1673168404Spjd#undef DO64 1674168404Spjd#undef DO32 1675168404Spjd} 1676168404Spjd 1677272810Sdelphijstatic inline uint8_t 1678272810Sdelphijdeduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) 1679272810Sdelphij{ 1680272810Sdelphij if (bonus_type == DMU_OT_SA) { 1681272810Sdelphij return (1); 1682272810Sdelphij } else { 1683272810Sdelphij return (1 + 1684272810Sdelphij ((DN_MAX_BONUSLEN - bonus_size) >> SPA_BLKPTRSHIFT)); 1685272810Sdelphij } 1686272810Sdelphij} 1687272810Sdelphij 1688168404Spjdstatic int 1689286705Smavreceive_object(struct receive_writer_arg *rwa, struct drr_object *drro, 1690286705Smav void *data) 1691168404Spjd{ 1692272810Sdelphij dmu_object_info_t doi; 1693168404Spjd dmu_tx_t *tx; 1694272810Sdelphij uint64_t object; 1695272810Sdelphij int err; 1696168404Spjd 1697168404Spjd if (drro->drr_type == DMU_OT_NONE || 1698236884Smm !DMU_OT_IS_VALID(drro->drr_type) || 1699236884Smm !DMU_OT_IS_VALID(drro->drr_bonustype) || 1700219089Spjd drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || 1701168404Spjd drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || 1702168404Spjd P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || 1703168404Spjd drro->drr_blksz < SPA_MINBLOCKSIZE || 1704286705Smav drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || 1705168404Spjd drro->drr_bonuslen > DN_MAX_BONUSLEN) { 1706249195Smm return (SET_ERROR(EINVAL)); 1707168404Spjd } 1708168404Spjd 1709286705Smav err = dmu_object_info(rwa->os, drro->drr_object, &doi); 1710168404Spjd 1711200726Sdelphij if (err != 0 && err != ENOENT) 1712249195Smm return (SET_ERROR(EINVAL)); 1713272810Sdelphij object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; 1714200726Sdelphij 1715272810Sdelphij /* 1716272810Sdelphij * If we are losing blkptrs or changing the block size this must 1717272810Sdelphij * be a new file instance. We must clear out the previous file 1718272810Sdelphij * contents before we can change this type of metadata in the dnode. 1719272810Sdelphij */ 1720272810Sdelphij if (err == 0) { 1721272810Sdelphij int nblkptr; 1722272810Sdelphij 1723272810Sdelphij nblkptr = deduce_nblkptr(drro->drr_bonustype, 1724272810Sdelphij drro->drr_bonuslen); 1725272810Sdelphij 1726272810Sdelphij if (drro->drr_blksz != doi.doi_data_block_size || 1727272810Sdelphij nblkptr < doi.doi_nblkptr) { 1728286705Smav err = dmu_free_long_range(rwa->os, drro->drr_object, 1729272810Sdelphij 0, DMU_OBJECT_END); 1730272810Sdelphij if (err != 0) 1731272810Sdelphij return (SET_ERROR(EINVAL)); 1732272810Sdelphij } 1733272810Sdelphij } 1734272810Sdelphij 1735286705Smav tx = dmu_tx_create(rwa->os); 1736272810Sdelphij dmu_tx_hold_bonus(tx, object); 1737272810Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 1738272810Sdelphij if (err != 0) { 1739272810Sdelphij dmu_tx_abort(tx); 1740272810Sdelphij return (err); 1741272810Sdelphij } 1742272810Sdelphij 1743272810Sdelphij if (object == DMU_NEW_OBJECT) { 1744168404Spjd /* currently free, want to be allocated */ 1745286705Smav err = dmu_object_claim(rwa->os, drro->drr_object, 1746168404Spjd drro->drr_type, drro->drr_blksz, 1747168404Spjd drro->drr_bonustype, drro->drr_bonuslen, tx); 1748272810Sdelphij } else if (drro->drr_type != doi.doi_type || 1749272810Sdelphij drro->drr_blksz != doi.doi_data_block_size || 1750272810Sdelphij drro->drr_bonustype != doi.doi_bonus_type || 1751272810Sdelphij drro->drr_bonuslen != doi.doi_bonus_size) { 1752272810Sdelphij /* currently allocated, but with different properties */ 1753286705Smav err = dmu_object_reclaim(rwa->os, drro->drr_object, 1754168404Spjd drro->drr_type, drro->drr_blksz, 1755272810Sdelphij drro->drr_bonustype, drro->drr_bonuslen, tx); 1756168404Spjd } 1757248571Smm if (err != 0) { 1758272810Sdelphij dmu_tx_commit(tx); 1759249195Smm return (SET_ERROR(EINVAL)); 1760219089Spjd } 1761200726Sdelphij 1762286705Smav dmu_object_set_checksum(rwa->os, drro->drr_object, 1763286587Smav drro->drr_checksumtype, tx); 1764286705Smav dmu_object_set_compress(rwa->os, drro->drr_object, 1765286587Smav drro->drr_compress, tx); 1766168404Spjd 1767200727Sdelphij if (data != NULL) { 1768168404Spjd dmu_buf_t *db; 1769200727Sdelphij 1770286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db)); 1771168404Spjd dmu_buf_will_dirty(db, tx); 1772168404Spjd 1773185029Spjd ASSERT3U(db->db_size, >=, drro->drr_bonuslen); 1774185029Spjd bcopy(data, db->db_data, drro->drr_bonuslen); 1775286705Smav if (rwa->byteswap) { 1776236884Smm dmu_object_byteswap_t byteswap = 1777236884Smm DMU_OT_BYTESWAP(drro->drr_bonustype); 1778236884Smm dmu_ot_byteswap[byteswap].ob_func(db->db_data, 1779168404Spjd drro->drr_bonuslen); 1780168404Spjd } 1781168404Spjd dmu_buf_rele(db, FTAG); 1782168404Spjd } 1783168404Spjd dmu_tx_commit(tx); 1784168404Spjd return (0); 1785168404Spjd} 1786168404Spjd 1787168404Spjd/* ARGSUSED */ 1788168404Spjdstatic int 1789286705Smavreceive_freeobjects(struct receive_writer_arg *rwa, 1790168404Spjd struct drr_freeobjects *drrfo) 1791168404Spjd{ 1792168404Spjd uint64_t obj; 1793168404Spjd 1794168404Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) 1795249195Smm return (SET_ERROR(EINVAL)); 1796168404Spjd 1797168404Spjd for (obj = drrfo->drr_firstobj; 1798168404Spjd obj < drrfo->drr_firstobj + drrfo->drr_numobjs; 1799286705Smav (void) dmu_object_next(rwa->os, &obj, FALSE, 0)) { 1800168404Spjd int err; 1801168404Spjd 1802286705Smav if (dmu_object_info(rwa->os, obj, NULL) != 0) 1803168404Spjd continue; 1804168404Spjd 1805286705Smav err = dmu_free_long_object(rwa->os, obj); 1806248571Smm if (err != 0) 1807168404Spjd return (err); 1808168404Spjd } 1809168404Spjd return (0); 1810168404Spjd} 1811168404Spjd 1812168404Spjdstatic int 1813286705Smavreceive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, 1814286705Smav arc_buf_t *abuf) 1815168404Spjd{ 1816168404Spjd dmu_tx_t *tx; 1817168404Spjd int err; 1818168404Spjd 1819168404Spjd if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || 1820236884Smm !DMU_OT_IS_VALID(drrw->drr_type)) 1821249195Smm return (SET_ERROR(EINVAL)); 1822168404Spjd 1823286705Smav if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) 1824249195Smm return (SET_ERROR(EINVAL)); 1825168404Spjd 1826286705Smav tx = dmu_tx_create(rwa->os); 1827272601Sdelphij 1828168404Spjd dmu_tx_hold_write(tx, drrw->drr_object, 1829168404Spjd drrw->drr_offset, drrw->drr_length); 1830168404Spjd err = dmu_tx_assign(tx, TXG_WAIT); 1831248571Smm if (err != 0) { 1832168404Spjd dmu_tx_abort(tx); 1833168404Spjd return (err); 1834168404Spjd } 1835286705Smav if (rwa->byteswap) { 1836236884Smm dmu_object_byteswap_t byteswap = 1837236884Smm DMU_OT_BYTESWAP(drrw->drr_type); 1838286587Smav dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, 1839286587Smav drrw->drr_length); 1840236884Smm } 1841286587Smav 1842286587Smav dmu_buf_t *bonus; 1843286705Smav if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) 1844286587Smav return (SET_ERROR(EINVAL)); 1845272601Sdelphij dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); 1846168404Spjd dmu_tx_commit(tx); 1847272601Sdelphij dmu_buf_rele(bonus, FTAG); 1848168404Spjd return (0); 1849168404Spjd} 1850168404Spjd 1851219089Spjd/* 1852219089Spjd * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed 1853219089Spjd * streams to refer to a copy of the data that is already on the 1854219089Spjd * system because it came in earlier in the stream. This function 1855219089Spjd * finds the earlier copy of the data, and uses that copy instead of 1856219089Spjd * data from the stream to fulfill this write. 1857219089Spjd */ 1858219089Spjdstatic int 1859286705Smavreceive_write_byref(struct receive_writer_arg *rwa, 1860286705Smav struct drr_write_byref *drrwbr) 1861219089Spjd{ 1862219089Spjd dmu_tx_t *tx; 1863219089Spjd int err; 1864219089Spjd guid_map_entry_t gmesrch; 1865219089Spjd guid_map_entry_t *gmep; 1866268075Sdelphij avl_index_t where; 1867219089Spjd objset_t *ref_os = NULL; 1868219089Spjd dmu_buf_t *dbp; 1869219089Spjd 1870219089Spjd if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) 1871249195Smm return (SET_ERROR(EINVAL)); 1872219089Spjd 1873219089Spjd /* 1874219089Spjd * If the GUID of the referenced dataset is different from the 1875219089Spjd * GUID of the target dataset, find the referenced dataset. 1876219089Spjd */ 1877219089Spjd if (drrwbr->drr_toguid != drrwbr->drr_refguid) { 1878219089Spjd gmesrch.guid = drrwbr->drr_refguid; 1879286705Smav if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, 1880219089Spjd &where)) == NULL) { 1881249195Smm return (SET_ERROR(EINVAL)); 1882219089Spjd } 1883219089Spjd if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) 1884249195Smm return (SET_ERROR(EINVAL)); 1885219089Spjd } else { 1886286705Smav ref_os = rwa->os; 1887219089Spjd } 1888219089Spjd 1889268075Sdelphij err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, 1890268075Sdelphij drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); 1891268075Sdelphij if (err != 0) 1892219089Spjd return (err); 1893219089Spjd 1894286705Smav tx = dmu_tx_create(rwa->os); 1895219089Spjd 1896219089Spjd dmu_tx_hold_write(tx, drrwbr->drr_object, 1897219089Spjd drrwbr->drr_offset, drrwbr->drr_length); 1898219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 1899248571Smm if (err != 0) { 1900219089Spjd dmu_tx_abort(tx); 1901219089Spjd return (err); 1902219089Spjd } 1903286705Smav dmu_write(rwa->os, drrwbr->drr_object, 1904219089Spjd drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); 1905219089Spjd dmu_buf_rele(dbp, FTAG); 1906219089Spjd dmu_tx_commit(tx); 1907219089Spjd return (0); 1908219089Spjd} 1909219089Spjd 1910219089Spjdstatic int 1911286705Smavreceive_write_embedded(struct receive_writer_arg *rwa, 1912286587Smav struct drr_write_embedded *drrwnp, void *data) 1913268075Sdelphij{ 1914268075Sdelphij dmu_tx_t *tx; 1915268075Sdelphij int err; 1916268075Sdelphij 1917268075Sdelphij if (drrwnp->drr_offset + drrwnp->drr_length < drrwnp->drr_offset) 1918268075Sdelphij return (EINVAL); 1919268075Sdelphij 1920268075Sdelphij if (drrwnp->drr_psize > BPE_PAYLOAD_SIZE) 1921268075Sdelphij return (EINVAL); 1922268075Sdelphij 1923268075Sdelphij if (drrwnp->drr_etype >= NUM_BP_EMBEDDED_TYPES) 1924268075Sdelphij return (EINVAL); 1925268075Sdelphij if (drrwnp->drr_compression >= ZIO_COMPRESS_FUNCTIONS) 1926268075Sdelphij return (EINVAL); 1927268075Sdelphij 1928286705Smav tx = dmu_tx_create(rwa->os); 1929268075Sdelphij 1930268075Sdelphij dmu_tx_hold_write(tx, drrwnp->drr_object, 1931268075Sdelphij drrwnp->drr_offset, drrwnp->drr_length); 1932268075Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 1933268075Sdelphij if (err != 0) { 1934268075Sdelphij dmu_tx_abort(tx); 1935268075Sdelphij return (err); 1936268075Sdelphij } 1937268075Sdelphij 1938286705Smav dmu_write_embedded(rwa->os, drrwnp->drr_object, 1939268075Sdelphij drrwnp->drr_offset, data, drrwnp->drr_etype, 1940268075Sdelphij drrwnp->drr_compression, drrwnp->drr_lsize, drrwnp->drr_psize, 1941286705Smav rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); 1942268075Sdelphij 1943268075Sdelphij dmu_tx_commit(tx); 1944268075Sdelphij return (0); 1945268075Sdelphij} 1946268075Sdelphij 1947268075Sdelphijstatic int 1948286705Smavreceive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, 1949286705Smav void *data) 1950219089Spjd{ 1951219089Spjd dmu_tx_t *tx; 1952219089Spjd dmu_buf_t *db, *db_spill; 1953219089Spjd int err; 1954219089Spjd 1955219089Spjd if (drrs->drr_length < SPA_MINBLOCKSIZE || 1956286705Smav drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) 1957249195Smm return (SET_ERROR(EINVAL)); 1958219089Spjd 1959286705Smav if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) 1960249195Smm return (SET_ERROR(EINVAL)); 1961219089Spjd 1962286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); 1963219089Spjd if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { 1964219089Spjd dmu_buf_rele(db, FTAG); 1965219089Spjd return (err); 1966219089Spjd } 1967219089Spjd 1968286705Smav tx = dmu_tx_create(rwa->os); 1969219089Spjd 1970219089Spjd dmu_tx_hold_spill(tx, db->db_object); 1971219089Spjd 1972219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 1973248571Smm if (err != 0) { 1974219089Spjd dmu_buf_rele(db, FTAG); 1975219089Spjd dmu_buf_rele(db_spill, FTAG); 1976219089Spjd dmu_tx_abort(tx); 1977219089Spjd return (err); 1978219089Spjd } 1979219089Spjd dmu_buf_will_dirty(db_spill, tx); 1980219089Spjd 1981219089Spjd if (db_spill->db_size < drrs->drr_length) 1982219089Spjd VERIFY(0 == dbuf_spill_set_blksz(db_spill, 1983219089Spjd drrs->drr_length, tx)); 1984219089Spjd bcopy(data, db_spill->db_data, drrs->drr_length); 1985219089Spjd 1986219089Spjd dmu_buf_rele(db, FTAG); 1987219089Spjd dmu_buf_rele(db_spill, FTAG); 1988219089Spjd 1989219089Spjd dmu_tx_commit(tx); 1990219089Spjd return (0); 1991219089Spjd} 1992219089Spjd 1993168404Spjd/* ARGSUSED */ 1994168404Spjdstatic int 1995286705Smavreceive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) 1996168404Spjd{ 1997168404Spjd int err; 1998168404Spjd 1999168404Spjd if (drrf->drr_length != -1ULL && 2000168404Spjd drrf->drr_offset + drrf->drr_length < drrf->drr_offset) 2001249195Smm return (SET_ERROR(EINVAL)); 2002168404Spjd 2003286705Smav if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) 2004249195Smm return (SET_ERROR(EINVAL)); 2005168404Spjd 2006286705Smav err = dmu_free_long_range(rwa->os, drrf->drr_object, 2007168404Spjd drrf->drr_offset, drrf->drr_length); 2008286705Smav 2009168404Spjd return (err); 2010168404Spjd} 2011168404Spjd 2012248571Smm/* used to destroy the drc_ds on error */ 2013248571Smmstatic void 2014248571Smmdmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) 2015248571Smm{ 2016248571Smm char name[MAXNAMELEN]; 2017248571Smm dsl_dataset_name(drc->drc_ds, name); 2018248571Smm dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2019248571Smm (void) dsl_destroy_head(name); 2020248571Smm} 2021248571Smm 2022286587Smavstatic void 2023286705Smavreceive_cksum(struct receive_arg *ra, int len, void *buf) 2024286587Smav{ 2025286587Smav if (ra->byteswap) { 2026286587Smav fletcher_4_incremental_byteswap(buf, len, &ra->cksum); 2027286587Smav } else { 2028286587Smav fletcher_4_incremental_native(buf, len, &ra->cksum); 2029286587Smav } 2030286587Smav} 2031286587Smav 2032185029Spjd/* 2033286705Smav * Read the payload into a buffer of size len, and update the current record's 2034286705Smav * payload field. 2035286705Smav * Allocate ra->next_rrd and read the next record's header into 2036286705Smav * ra->next_rrd->header. 2037286587Smav * Verify checksum of payload and next record. 2038286587Smav */ 2039286587Smavstatic int 2040286705Smavreceive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) 2041286587Smav{ 2042286587Smav int err; 2043286587Smav 2044286587Smav if (len != 0) { 2045286705Smav ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); 2046286705Smav ra->rrd->payload = buf; 2047286705Smav ra->rrd->payload_size = len; 2048286705Smav err = receive_read(ra, len, ra->rrd->payload); 2049286587Smav if (err != 0) 2050286587Smav return (err); 2051286705Smav receive_cksum(ra, len, ra->rrd->payload); 2052286587Smav } 2053286587Smav 2054286587Smav ra->prev_cksum = ra->cksum; 2055286587Smav 2056286705Smav ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); 2057286705Smav err = receive_read(ra, sizeof (ra->next_rrd->header), 2058286705Smav &ra->next_rrd->header); 2059286705Smav if (err != 0) { 2060286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2061286705Smav ra->next_rrd = NULL; 2062286587Smav return (err); 2063286705Smav } 2064286705Smav if (ra->next_rrd->header.drr_type == DRR_BEGIN) { 2065286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2066286705Smav ra->next_rrd = NULL; 2067286587Smav return (SET_ERROR(EINVAL)); 2068286705Smav } 2069286587Smav 2070286587Smav /* 2071286587Smav * Note: checksum is of everything up to but not including the 2072286587Smav * checksum itself. 2073286587Smav */ 2074286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2075286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 2076286705Smav receive_cksum(ra, 2077286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2078286705Smav &ra->next_rrd->header); 2079286587Smav 2080286705Smav zio_cksum_t cksum_orig = 2081286705Smav ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2082286705Smav zio_cksum_t *cksump = 2083286705Smav &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2084286587Smav 2085286587Smav if (ra->byteswap) 2086286705Smav byteswap_record(&ra->next_rrd->header); 2087286587Smav 2088286587Smav if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && 2089286705Smav !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { 2090286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2091286705Smav ra->next_rrd = NULL; 2092286587Smav return (SET_ERROR(ECKSUM)); 2093286705Smav } 2094286587Smav 2095286705Smav receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); 2096286587Smav 2097286587Smav return (0); 2098286587Smav} 2099286587Smav 2100286705Smav/* 2101286705Smav * Issue the prefetch reads for any necessary indirect blocks. 2102286705Smav * 2103286705Smav * We use the object ignore list to tell us whether or not to issue prefetches 2104286705Smav * for a given object. We do this for both correctness (in case the blocksize 2105286705Smav * of an object has changed) and performance (if the object doesn't exist, don't 2106286705Smav * needlessly try to issue prefetches). We also trim the list as we go through 2107286705Smav * the stream to prevent it from growing to an unbounded size. 2108286705Smav * 2109286705Smav * The object numbers within will always be in sorted order, and any write 2110286705Smav * records we see will also be in sorted order, but they're not sorted with 2111286705Smav * respect to each other (i.e. we can get several object records before 2112286705Smav * receiving each object's write records). As a result, once we've reached a 2113286705Smav * given object number, we can safely remove any reference to lower object 2114286705Smav * numbers in the ignore list. In practice, we receive up to 32 object records 2115286705Smav * before receiving write records, so the list can have up to 32 nodes in it. 2116286705Smav */ 2117286705Smav/* ARGSUSED */ 2118286705Smavstatic void 2119286705Smavreceive_read_prefetch(struct receive_arg *ra, 2120286705Smav uint64_t object, uint64_t offset, uint64_t length) 2121286705Smav{ 2122286705Smav struct receive_ign_obj_node *node = list_head(&ra->ignore_obj_list); 2123286705Smav while (node != NULL && node->object < object) { 2124286705Smav VERIFY3P(node, ==, list_remove_head(&ra->ignore_obj_list)); 2125286705Smav kmem_free(node, sizeof (*node)); 2126286705Smav node = list_head(&ra->ignore_obj_list); 2127286705Smav } 2128286705Smav if (node == NULL || node->object > object) { 2129286705Smav dmu_prefetch(ra->os, object, 1, offset, length, 2130286705Smav ZIO_PRIORITY_SYNC_READ); 2131286705Smav } 2132286705Smav} 2133286705Smav 2134286705Smav/* 2135286705Smav * Read records off the stream, issuing any necessary prefetches. 2136286705Smav */ 2137286587Smavstatic int 2138286705Smavreceive_read_record(struct receive_arg *ra) 2139286587Smav{ 2140286587Smav int err; 2141286587Smav 2142286705Smav switch (ra->rrd->header.drr_type) { 2143286587Smav case DRR_OBJECT: 2144286587Smav { 2145286705Smav struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; 2146286705Smav uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8); 2147286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2148286705Smav dmu_object_info_t doi; 2149286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2150286705Smav if (err != 0) { 2151286705Smav kmem_free(buf, size); 2152286587Smav return (err); 2153286705Smav } 2154286705Smav err = dmu_object_info(ra->os, drro->drr_object, &doi); 2155286705Smav /* 2156286705Smav * See receive_read_prefetch for an explanation why we're 2157286705Smav * storing this object in the ignore_obj_list. 2158286705Smav */ 2159286705Smav if (err == ENOENT || 2160286705Smav (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { 2161286705Smav struct receive_ign_obj_node *node = 2162286705Smav kmem_zalloc(sizeof (*node), 2163286705Smav KM_SLEEP); 2164286705Smav node->object = drro->drr_object; 2165286705Smav#ifdef ZFS_DEBUG 2166286705Smav struct receive_ign_obj_node *last_object = 2167286705Smav list_tail(&ra->ignore_obj_list); 2168286705Smav uint64_t last_objnum = (last_object != NULL ? 2169286705Smav last_object->object : 0); 2170286705Smav ASSERT3U(node->object, >, last_objnum); 2171286705Smav#endif 2172286705Smav list_insert_tail(&ra->ignore_obj_list, node); 2173286705Smav err = 0; 2174286705Smav } 2175286705Smav return (err); 2176286587Smav } 2177286587Smav case DRR_FREEOBJECTS: 2178286587Smav { 2179286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2180286705Smav return (err); 2181286587Smav } 2182286587Smav case DRR_WRITE: 2183286587Smav { 2184286705Smav struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; 2185286587Smav arc_buf_t *abuf = arc_loan_buf(dmu_objset_spa(ra->os), 2186286587Smav drrw->drr_length); 2187286587Smav 2188286705Smav err = receive_read_payload_and_next_header(ra, 2189286587Smav drrw->drr_length, abuf->b_data); 2190286705Smav if (err != 0) { 2191286705Smav dmu_return_arcbuf(abuf); 2192286587Smav return (err); 2193286705Smav } 2194286705Smav ra->rrd->write_buf = abuf; 2195286705Smav receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, 2196286705Smav drrw->drr_length); 2197286587Smav return (err); 2198286587Smav } 2199286587Smav case DRR_WRITE_BYREF: 2200286587Smav { 2201286705Smav struct drr_write_byref *drrwb = 2202286705Smav &ra->rrd->header.drr_u.drr_write_byref; 2203286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2204286705Smav receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, 2205286705Smav drrwb->drr_length); 2206286705Smav return (err); 2207286587Smav } 2208286587Smav case DRR_WRITE_EMBEDDED: 2209286587Smav { 2210286587Smav struct drr_write_embedded *drrwe = 2211286705Smav &ra->rrd->header.drr_u.drr_write_embedded; 2212286705Smav uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); 2213286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2214286705Smav 2215286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2216286705Smav if (err != 0) { 2217286705Smav kmem_free(buf, size); 2218286587Smav return (err); 2219286705Smav } 2220286705Smav 2221286705Smav receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, 2222286705Smav drrwe->drr_length); 2223286705Smav return (err); 2224286587Smav } 2225286587Smav case DRR_FREE: 2226286587Smav { 2227286705Smav /* 2228286705Smav * It might be beneficial to prefetch indirect blocks here, but 2229286705Smav * we don't really have the data to decide for sure. 2230286705Smav */ 2231286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2232286705Smav return (err); 2233286587Smav } 2234286587Smav case DRR_END: 2235286587Smav { 2236286705Smav struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; 2237286587Smav if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) 2238286587Smav return (SET_ERROR(EINVAL)); 2239286587Smav return (0); 2240286587Smav } 2241286587Smav case DRR_SPILL: 2242286587Smav { 2243286705Smav struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; 2244286705Smav void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP); 2245286705Smav err = receive_read_payload_and_next_header(ra, drrs->drr_length, 2246286705Smav buf); 2247286587Smav if (err != 0) 2248286705Smav kmem_free(buf, drrs->drr_length); 2249286705Smav return (err); 2250286587Smav } 2251286587Smav default: 2252286587Smav return (SET_ERROR(EINVAL)); 2253286587Smav } 2254286587Smav} 2255286587Smav 2256286587Smav/* 2257286705Smav * Commit the records to the pool. 2258286705Smav */ 2259286705Smavstatic int 2260286705Smavreceive_process_record(struct receive_writer_arg *rwa, 2261286705Smav struct receive_record_arg *rrd) 2262286705Smav{ 2263286705Smav int err; 2264286705Smav 2265286705Smav switch (rrd->header.drr_type) { 2266286705Smav case DRR_OBJECT: 2267286705Smav { 2268286705Smav struct drr_object *drro = &rrd->header.drr_u.drr_object; 2269286705Smav err = receive_object(rwa, drro, rrd->payload); 2270286705Smav kmem_free(rrd->payload, rrd->payload_size); 2271286705Smav rrd->payload = NULL; 2272286705Smav return (err); 2273286705Smav } 2274286705Smav case DRR_FREEOBJECTS: 2275286705Smav { 2276286705Smav struct drr_freeobjects *drrfo = 2277286705Smav &rrd->header.drr_u.drr_freeobjects; 2278286705Smav return (receive_freeobjects(rwa, drrfo)); 2279286705Smav } 2280286705Smav case DRR_WRITE: 2281286705Smav { 2282286705Smav struct drr_write *drrw = &rrd->header.drr_u.drr_write; 2283286705Smav err = receive_write(rwa, drrw, rrd->write_buf); 2284286705Smav /* if receive_write() is successful, it consumes the arc_buf */ 2285286705Smav if (err != 0) 2286286705Smav dmu_return_arcbuf(rrd->write_buf); 2287286705Smav rrd->write_buf = NULL; 2288286705Smav rrd->payload = NULL; 2289286705Smav return (err); 2290286705Smav } 2291286705Smav case DRR_WRITE_BYREF: 2292286705Smav { 2293286705Smav struct drr_write_byref *drrwbr = 2294286705Smav &rrd->header.drr_u.drr_write_byref; 2295286705Smav return (receive_write_byref(rwa, drrwbr)); 2296286705Smav } 2297286705Smav case DRR_WRITE_EMBEDDED: 2298286705Smav { 2299286705Smav struct drr_write_embedded *drrwe = 2300286705Smav &rrd->header.drr_u.drr_write_embedded; 2301286705Smav err = receive_write_embedded(rwa, drrwe, rrd->payload); 2302286705Smav kmem_free(rrd->payload, rrd->payload_size); 2303286705Smav rrd->payload = NULL; 2304286705Smav return (err); 2305286705Smav } 2306286705Smav case DRR_FREE: 2307286705Smav { 2308286705Smav struct drr_free *drrf = &rrd->header.drr_u.drr_free; 2309286705Smav return (receive_free(rwa, drrf)); 2310286705Smav } 2311286705Smav case DRR_SPILL: 2312286705Smav { 2313286705Smav struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; 2314286705Smav err = receive_spill(rwa, drrs, rrd->payload); 2315286705Smav kmem_free(rrd->payload, rrd->payload_size); 2316286705Smav rrd->payload = NULL; 2317286705Smav return (err); 2318286705Smav } 2319286705Smav default: 2320286705Smav return (SET_ERROR(EINVAL)); 2321286705Smav } 2322286705Smav} 2323286705Smav 2324286705Smav/* 2325286705Smav * dmu_recv_stream's worker thread; pull records off the queue, and then call 2326286705Smav * receive_process_record When we're done, signal the main thread and exit. 2327286705Smav */ 2328286705Smavstatic void 2329286705Smavreceive_writer_thread(void *arg) 2330286705Smav{ 2331286705Smav struct receive_writer_arg *rwa = arg; 2332286705Smav struct receive_record_arg *rrd; 2333286705Smav for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; 2334286705Smav rrd = bqueue_dequeue(&rwa->q)) { 2335286705Smav /* 2336286705Smav * If there's an error, the main thread will stop putting things 2337286705Smav * on the queue, but we need to clear everything in it before we 2338286705Smav * can exit. 2339286705Smav */ 2340286705Smav if (rwa->err == 0) { 2341286705Smav rwa->err = receive_process_record(rwa, rrd); 2342286705Smav } else if (rrd->write_buf != NULL) { 2343286705Smav dmu_return_arcbuf(rrd->write_buf); 2344286705Smav rrd->write_buf = NULL; 2345286705Smav rrd->payload = NULL; 2346286705Smav } else if (rrd->payload != NULL) { 2347286705Smav kmem_free(rrd->payload, rrd->payload_size); 2348286705Smav rrd->payload = NULL; 2349286705Smav } 2350286705Smav kmem_free(rrd, sizeof (*rrd)); 2351286705Smav } 2352286705Smav kmem_free(rrd, sizeof (*rrd)); 2353286705Smav mutex_enter(&rwa->mutex); 2354286705Smav rwa->done = B_TRUE; 2355286705Smav cv_signal(&rwa->cv); 2356286705Smav mutex_exit(&rwa->mutex); 2357286705Smav thread_exit(); 2358286705Smav} 2359286705Smav 2360286705Smav/* 2361286705Smav * Read in the stream's records, one by one, and apply them to the pool. There 2362286705Smav * are two threads involved; the thread that calls this function will spin up a 2363286705Smav * worker thread, read the records off the stream one by one, and issue 2364286705Smav * prefetches for any necessary indirect blocks. It will then push the records 2365286705Smav * onto an internal blocking queue. The worker thread will pull the records off 2366286705Smav * the queue, and actually write the data into the DMU. This way, the worker 2367286705Smav * thread doesn't have to wait for reads to complete, since everything it needs 2368286705Smav * (the indirect blocks) will be prefetched. 2369286705Smav * 2370185029Spjd * NB: callers *must* call dmu_recv_end() if this succeeds. 2371185029Spjd */ 2372168404Spjdint 2373219089Spjddmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp, 2374219089Spjd int cleanup_fd, uint64_t *action_handlep) 2375168404Spjd{ 2376286587Smav int err = 0; 2377286705Smav struct receive_arg ra = { 0 }; 2378286705Smav struct receive_writer_arg rwa = { 0 }; 2379219089Spjd int featureflags; 2380168404Spjd 2381248571Smm ra.byteswap = drc->drc_byteswap; 2382248571Smm ra.cksum = drc->drc_cksum; 2383219089Spjd ra.td = curthread; 2384185029Spjd ra.fp = fp; 2385185029Spjd ra.voff = *voffp; 2386286705Smav list_create(&ra.ignore_obj_list, sizeof (struct receive_ign_obj_node), 2387286705Smav offsetof(struct receive_ign_obj_node, node)); 2388168404Spjd 2389185029Spjd /* these were verified in dmu_recv_begin */ 2390248571Smm ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, 2391219089Spjd DMU_SUBSTREAM); 2392248571Smm ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); 2393168404Spjd 2394168404Spjd /* 2395168404Spjd * Open the objset we are modifying. 2396168404Spjd */ 2397286587Smav VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra.os)); 2398168404Spjd 2399275782Sdelphij ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); 2400168404Spjd 2401219089Spjd featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); 2402219089Spjd 2403219089Spjd /* if this stream is dedup'ed, set up the avl tree for guid mapping */ 2404219089Spjd if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { 2405219089Spjd minor_t minor; 2406219089Spjd 2407219089Spjd if (cleanup_fd == -1) { 2408249195Smm ra.err = SET_ERROR(EBADF); 2409219089Spjd goto out; 2410219089Spjd } 2411219089Spjd ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); 2412248571Smm if (ra.err != 0) { 2413219089Spjd cleanup_fd = -1; 2414219089Spjd goto out; 2415219089Spjd } 2416219089Spjd 2417219089Spjd if (*action_handlep == 0) { 2418286705Smav rwa.guid_to_ds_map = 2419219089Spjd kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); 2420286705Smav avl_create(rwa.guid_to_ds_map, guid_compare, 2421219089Spjd sizeof (guid_map_entry_t), 2422219089Spjd offsetof(guid_map_entry_t, avlnode)); 2423286587Smav err = zfs_onexit_add_cb(minor, 2424286705Smav free_guid_map_onexit, rwa.guid_to_ds_map, 2425219089Spjd action_handlep); 2426248571Smm if (ra.err != 0) 2427219089Spjd goto out; 2428219089Spjd } else { 2429286587Smav err = zfs_onexit_cb_data(minor, *action_handlep, 2430286705Smav (void **)&rwa.guid_to_ds_map); 2431248571Smm if (ra.err != 0) 2432219089Spjd goto out; 2433219089Spjd } 2434221263Smm 2435286705Smav drc->drc_guid_to_ds_map = rwa.guid_to_ds_map; 2436219089Spjd } 2437219089Spjd 2438286705Smav err = receive_read_payload_and_next_header(&ra, 0, NULL); 2439286705Smav if (err) 2440286587Smav goto out; 2441286587Smav 2442286705Smav (void) bqueue_init(&rwa.q, zfs_recv_queue_length, 2443286705Smav offsetof(struct receive_record_arg, node)); 2444286705Smav cv_init(&rwa.cv, NULL, CV_DEFAULT, NULL); 2445286705Smav mutex_init(&rwa.mutex, NULL, MUTEX_DEFAULT, NULL); 2446286705Smav rwa.os = ra.os; 2447286705Smav rwa.byteswap = drc->drc_byteswap; 2448286705Smav 2449286705Smav (void) thread_create(NULL, 0, receive_writer_thread, &rwa, 0, curproc, 2450286705Smav TS_RUN, minclsyspri); 2451286705Smav /* 2452286705Smav * We're reading rwa.err without locks, which is safe since we are the 2453286705Smav * only reader, and the worker thread is the only writer. It's ok if we 2454286705Smav * miss a write for an iteration or two of the loop, since the writer 2455286705Smav * thread will keep freeing records we send it until we send it an eos 2456286705Smav * marker. 2457286705Smav * 2458286705Smav * We can leave this loop in 3 ways: First, if rwa.err is 2459286705Smav * non-zero. In that case, the writer thread will free the rrd we just 2460286705Smav * pushed. Second, if we're interrupted; in that case, either it's the 2461286705Smav * first loop and ra.rrd was never allocated, or it's later, and ra.rrd 2462286705Smav * has been handed off to the writer thread who will free it. Finally, 2463286705Smav * if receive_read_record fails or we're at the end of the stream, then 2464286705Smav * we free ra.rrd and exit. 2465286705Smav */ 2466286705Smav while (rwa.err == 0) { 2467185029Spjd if (issig(JUSTLOOKING) && issig(FORREAL)) { 2468286587Smav err = SET_ERROR(EINTR); 2469286587Smav break; 2470168404Spjd } 2471168404Spjd 2472286705Smav ASSERT3P(ra.rrd, ==, NULL); 2473286705Smav ra.rrd = ra.next_rrd; 2474286705Smav ra.next_rrd = NULL; 2475286705Smav /* Allocates and loads header into ra.next_rrd */ 2476286705Smav err = receive_read_record(&ra); 2477168404Spjd 2478286705Smav if (ra.rrd->header.drr_type == DRR_END || err != 0) { 2479286705Smav kmem_free(ra.rrd, sizeof (*ra.rrd)); 2480286705Smav ra.rrd = NULL; 2481168404Spjd break; 2482286705Smav } 2483286705Smav 2484286705Smav bqueue_enqueue(&rwa.q, ra.rrd, 2485286705Smav sizeof (struct receive_record_arg) + ra.rrd->payload_size); 2486286705Smav ra.rrd = NULL; 2487168404Spjd } 2488286705Smav if (ra.next_rrd == NULL) 2489286705Smav ra.next_rrd = kmem_zalloc(sizeof (*ra.next_rrd), KM_SLEEP); 2490286705Smav ra.next_rrd->eos_marker = B_TRUE; 2491286705Smav bqueue_enqueue(&rwa.q, ra.next_rrd, 1); 2492168404Spjd 2493286705Smav mutex_enter(&rwa.mutex); 2494286705Smav while (!rwa.done) { 2495286705Smav cv_wait(&rwa.cv, &rwa.mutex); 2496286705Smav } 2497286705Smav mutex_exit(&rwa.mutex); 2498286705Smav 2499286705Smav cv_destroy(&rwa.cv); 2500286705Smav mutex_destroy(&rwa.mutex); 2501286705Smav bqueue_destroy(&rwa.q); 2502286705Smav if (err == 0) 2503286705Smav err = rwa.err; 2504286705Smav 2505168404Spjdout: 2506219089Spjd if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) 2507219089Spjd zfs_onexit_fd_rele(cleanup_fd); 2508168404Spjd 2509286587Smav if (err != 0) { 2510168404Spjd /* 2511219089Spjd * destroy what we created, so we don't leave it in the 2512219089Spjd * inconsistent restoring state. 2513168404Spjd */ 2514248571Smm dmu_recv_cleanup_ds(drc); 2515168404Spjd } 2516168404Spjd 2517185029Spjd *voffp = ra.voff; 2518286705Smav for (struct receive_ign_obj_node *n = 2519286705Smav list_remove_head(&ra.ignore_obj_list); n != NULL; 2520286705Smav n = list_remove_head(&ra.ignore_obj_list)) { 2521286705Smav kmem_free(n, sizeof (*n)); 2522286705Smav } 2523286705Smav list_destroy(&ra.ignore_obj_list); 2524286587Smav return (err); 2525168404Spjd} 2526185029Spjd 2527185029Spjdstatic int 2528248571Smmdmu_recv_end_check(void *arg, dmu_tx_t *tx) 2529185029Spjd{ 2530248571Smm dmu_recv_cookie_t *drc = arg; 2531248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 2532248571Smm int error; 2533185029Spjd 2534248571Smm ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); 2535248571Smm 2536248571Smm if (!drc->drc_newfs) { 2537248571Smm dsl_dataset_t *origin_head; 2538248571Smm 2539248571Smm error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); 2540248571Smm if (error != 0) 2541248571Smm return (error); 2542253820Sdelphij if (drc->drc_force) { 2543253820Sdelphij /* 2544253820Sdelphij * We will destroy any snapshots in tofs (i.e. before 2545253820Sdelphij * origin_head) that are after the origin (which is 2546253820Sdelphij * the snap before drc_ds, because drc_ds can not 2547253820Sdelphij * have any snaps of its own). 2548253820Sdelphij */ 2549275782Sdelphij uint64_t obj; 2550275782Sdelphij 2551275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 2552275782Sdelphij while (obj != 2553275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 2554253820Sdelphij dsl_dataset_t *snap; 2555253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 2556253820Sdelphij &snap); 2557253820Sdelphij if (error != 0) 2558282473Savg break; 2559253820Sdelphij if (snap->ds_dir != origin_head->ds_dir) 2560253820Sdelphij error = SET_ERROR(EINVAL); 2561253820Sdelphij if (error == 0) { 2562253820Sdelphij error = dsl_destroy_snapshot_check_impl( 2563253820Sdelphij snap, B_FALSE); 2564253820Sdelphij } 2565275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 2566253820Sdelphij dsl_dataset_rele(snap, FTAG); 2567253820Sdelphij if (error != 0) 2568282473Savg break; 2569253820Sdelphij } 2570282473Savg if (error != 0) { 2571282473Savg dsl_dataset_rele(origin_head, FTAG); 2572282473Savg return (error); 2573282473Savg } 2574253820Sdelphij } 2575248571Smm error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, 2576253816Sdelphij origin_head, drc->drc_force, drc->drc_owner, tx); 2577248571Smm if (error != 0) { 2578248571Smm dsl_dataset_rele(origin_head, FTAG); 2579248571Smm return (error); 2580248571Smm } 2581248571Smm error = dsl_dataset_snapshot_check_impl(origin_head, 2582264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 2583248571Smm dsl_dataset_rele(origin_head, FTAG); 2584248571Smm if (error != 0) 2585248571Smm return (error); 2586248571Smm 2587248571Smm error = dsl_destroy_head_check_impl(drc->drc_ds, 1); 2588248571Smm } else { 2589248571Smm error = dsl_dataset_snapshot_check_impl(drc->drc_ds, 2590264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 2591248571Smm } 2592248571Smm return (error); 2593185029Spjd} 2594185029Spjd 2595185029Spjdstatic void 2596248571Smmdmu_recv_end_sync(void *arg, dmu_tx_t *tx) 2597185029Spjd{ 2598248571Smm dmu_recv_cookie_t *drc = arg; 2599248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 2600185029Spjd 2601248571Smm spa_history_log_internal_ds(drc->drc_ds, "finish receiving", 2602248571Smm tx, "snap=%s", drc->drc_tosnap); 2603185029Spjd 2604248571Smm if (!drc->drc_newfs) { 2605248571Smm dsl_dataset_t *origin_head; 2606185029Spjd 2607248571Smm VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, 2608248571Smm &origin_head)); 2609253820Sdelphij 2610253820Sdelphij if (drc->drc_force) { 2611253820Sdelphij /* 2612253820Sdelphij * Destroy any snapshots of drc_tofs (origin_head) 2613253820Sdelphij * after the origin (the snap before drc_ds). 2614253820Sdelphij */ 2615275782Sdelphij uint64_t obj; 2616275782Sdelphij 2617275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 2618275782Sdelphij while (obj != 2619275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 2620253820Sdelphij dsl_dataset_t *snap; 2621253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, 2622253820Sdelphij &snap)); 2623253820Sdelphij ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); 2624275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 2625253820Sdelphij dsl_destroy_snapshot_sync_impl(snap, 2626253820Sdelphij B_FALSE, tx); 2627253820Sdelphij dsl_dataset_rele(snap, FTAG); 2628253820Sdelphij } 2629253820Sdelphij } 2630253820Sdelphij VERIFY3P(drc->drc_ds->ds_prev, ==, 2631253820Sdelphij origin_head->ds_prev); 2632253820Sdelphij 2633248571Smm dsl_dataset_clone_swap_sync_impl(drc->drc_ds, 2634248571Smm origin_head, tx); 2635248571Smm dsl_dataset_snapshot_sync_impl(origin_head, 2636248571Smm drc->drc_tosnap, tx); 2637248571Smm 2638248571Smm /* set snapshot's creation time and guid */ 2639248571Smm dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); 2640275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = 2641248571Smm drc->drc_drrb->drr_creation_time; 2642275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_guid = 2643248571Smm drc->drc_drrb->drr_toguid; 2644275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= 2645248571Smm ~DS_FLAG_INCONSISTENT; 2646248571Smm 2647248571Smm dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 2648275782Sdelphij dsl_dataset_phys(origin_head)->ds_flags &= 2649275782Sdelphij ~DS_FLAG_INCONSISTENT; 2650248571Smm 2651248571Smm dsl_dataset_rele(origin_head, FTAG); 2652248571Smm dsl_destroy_head_sync_impl(drc->drc_ds, tx); 2653253816Sdelphij 2654253816Sdelphij if (drc->drc_owner != NULL) 2655253816Sdelphij VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); 2656248571Smm } else { 2657248571Smm dsl_dataset_t *ds = drc->drc_ds; 2658248571Smm 2659248571Smm dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); 2660248571Smm 2661248571Smm /* set snapshot's creation time and guid */ 2662248571Smm dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 2663275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_creation_time = 2664248571Smm drc->drc_drrb->drr_creation_time; 2665275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_guid = 2666275782Sdelphij drc->drc_drrb->drr_toguid; 2667275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_flags &= 2668275782Sdelphij ~DS_FLAG_INCONSISTENT; 2669248571Smm 2670248571Smm dmu_buf_will_dirty(ds->ds_dbuf, tx); 2671275782Sdelphij dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 2672248571Smm } 2673275782Sdelphij drc->drc_newsnapobj = dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; 2674248571Smm /* 2675248571Smm * Release the hold from dmu_recv_begin. This must be done before 2676248571Smm * we return to open context, so that when we free the dataset's dnode, 2677248571Smm * we can evict its bonus buffer. 2678248571Smm */ 2679248571Smm dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2680248571Smm drc->drc_ds = NULL; 2681185029Spjd} 2682185029Spjd 2683219089Spjdstatic int 2684248571Smmadd_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) 2685221263Smm{ 2686248571Smm dsl_pool_t *dp; 2687221263Smm dsl_dataset_t *snapds; 2688221263Smm guid_map_entry_t *gmep; 2689221263Smm int err; 2690221263Smm 2691221263Smm ASSERT(guid_map != NULL); 2692221263Smm 2693248571Smm err = dsl_pool_hold(name, FTAG, &dp); 2694248571Smm if (err != 0) 2695248571Smm return (err); 2696249356Smm gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); 2697249196Smm err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); 2698221263Smm if (err == 0) { 2699275782Sdelphij gmep->guid = dsl_dataset_phys(snapds)->ds_guid; 2700221263Smm gmep->gme_ds = snapds; 2701221263Smm avl_add(guid_map, gmep); 2702248571Smm dsl_dataset_long_hold(snapds, gmep); 2703249196Smm } else 2704249356Smm kmem_free(gmep, sizeof (*gmep)); 2705221263Smm 2706248571Smm dsl_pool_rele(dp, FTAG); 2707221263Smm return (err); 2708221263Smm} 2709221263Smm 2710248571Smmstatic int dmu_recv_end_modified_blocks = 3; 2711248571Smm 2712221263Smmstatic int 2713219089Spjddmu_recv_existing_end(dmu_recv_cookie_t *drc) 2714185029Spjd{ 2715248571Smm int error; 2716248571Smm char name[MAXNAMELEN]; 2717185029Spjd 2718248571Smm#ifdef _KERNEL 2719248571Smm /* 2720248571Smm * We will be destroying the ds; make sure its origin is unmounted if 2721248571Smm * necessary. 2722248571Smm */ 2723248571Smm dsl_dataset_name(drc->drc_ds, name); 2724248571Smm zfs_destroy_unmount_origin(name); 2725248571Smm#endif 2726185029Spjd 2727248571Smm error = dsl_sync_task(drc->drc_tofs, 2728248571Smm dmu_recv_end_check, dmu_recv_end_sync, drc, 2729268473Sdelphij dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); 2730185029Spjd 2731248571Smm if (error != 0) 2732248571Smm dmu_recv_cleanup_ds(drc); 2733248571Smm return (error); 2734185029Spjd} 2735219089Spjd 2736219089Spjdstatic int 2737219089Spjddmu_recv_new_end(dmu_recv_cookie_t *drc) 2738219089Spjd{ 2739248571Smm int error; 2740219089Spjd 2741248571Smm error = dsl_sync_task(drc->drc_tofs, 2742248571Smm dmu_recv_end_check, dmu_recv_end_sync, drc, 2743268473Sdelphij dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); 2744219089Spjd 2745248571Smm if (error != 0) { 2746248571Smm dmu_recv_cleanup_ds(drc); 2747248571Smm } else if (drc->drc_guid_to_ds_map != NULL) { 2748248571Smm (void) add_ds_to_guidmap(drc->drc_tofs, 2749248571Smm drc->drc_guid_to_ds_map, 2750248571Smm drc->drc_newsnapobj); 2751219089Spjd } 2752248571Smm return (error); 2753219089Spjd} 2754219089Spjd 2755219089Spjdint 2756253816Sdelphijdmu_recv_end(dmu_recv_cookie_t *drc, void *owner) 2757219089Spjd{ 2758253816Sdelphij drc->drc_owner = owner; 2759253816Sdelphij 2760248571Smm if (drc->drc_newfs) 2761248571Smm return (dmu_recv_new_end(drc)); 2762248571Smm else 2763219089Spjd return (dmu_recv_existing_end(drc)); 2764219089Spjd} 2765253821Sdelphij 2766253821Sdelphij/* 2767253821Sdelphij * Return TRUE if this objset is currently being received into. 2768253821Sdelphij */ 2769253821Sdelphijboolean_t 2770253821Sdelphijdmu_objset_is_receiving(objset_t *os) 2771253821Sdelphij{ 2772253821Sdelphij return (os->os_dsl_dataset != NULL && 2773253821Sdelphij os->os_dsl_dataset->ds_owner == dmu_recv_tag); 2774253821Sdelphij} 2775