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. 28296516Smav * Copyright 2016 RackTop Systems. 29296519Smav * Copyright (c) 2014 Integros [integros.com] 30359722Sfreqlabs * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. 31221263Smm */ 32168404Spjd 33168404Spjd#include <sys/dmu.h> 34168404Spjd#include <sys/dmu_impl.h> 35168404Spjd#include <sys/dmu_tx.h> 36168404Spjd#include <sys/dbuf.h> 37168404Spjd#include <sys/dnode.h> 38168404Spjd#include <sys/zfs_context.h> 39168404Spjd#include <sys/dmu_objset.h> 40168404Spjd#include <sys/dmu_traverse.h> 41168404Spjd#include <sys/dsl_dataset.h> 42168404Spjd#include <sys/dsl_dir.h> 43219089Spjd#include <sys/dsl_prop.h> 44168404Spjd#include <sys/dsl_pool.h> 45168404Spjd#include <sys/dsl_synctask.h> 46168404Spjd#include <sys/zfs_ioctl.h> 47168404Spjd#include <sys/zap.h> 48168404Spjd#include <sys/zio_checksum.h> 49219089Spjd#include <sys/zfs_znode.h> 50219089Spjd#include <zfs_fletcher.h> 51219089Spjd#include <sys/avl.h> 52219089Spjd#include <sys/ddt.h> 53219089Spjd#include <sys/zfs_onexit.h> 54248571Smm#include <sys/dmu_send.h> 55248571Smm#include <sys/dsl_destroy.h> 56268075Sdelphij#include <sys/blkptr.h> 57260183Sdelphij#include <sys/dsl_bookmark.h> 58268075Sdelphij#include <sys/zfeature.h> 59286705Smav#include <sys/bqueue.h> 60168404Spjd 61268075Sdelphij#ifdef __FreeBSD__ 62268075Sdelphij#undef dump_write 63268075Sdelphij#define dump_write dmu_dump_write 64268075Sdelphij#endif 65268075Sdelphij 66228103Smm/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ 67228103Smmint zfs_send_corrupt_data = B_FALSE; 68286705Smavint zfs_send_queue_length = 16 * 1024 * 1024; 69286705Smavint zfs_recv_queue_length = 16 * 1024 * 1024; 70296516Smav/* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */ 71296516Smavint zfs_send_set_freerecords_bit = B_TRUE; 72228103Smm 73296516Smav#ifdef _KERNEL 74296516SmavTUNABLE_INT("vfs.zfs.send_set_freerecords_bit", &zfs_send_set_freerecords_bit); 75296516Smav#endif 76296516Smav 77185029Spjdstatic char *dmu_recv_tag = "dmu_recv_tag"; 78289362Smavconst char *recv_clone_name = "%recv"; 79185029Spjd 80339110Smav/* 81339110Smav * Use this to override the recordsize calculation for fast zfs send estimates. 82339110Smav */ 83339110Smavuint64_t zfs_override_estimate_recordsize = 0; 84339110Smav 85286705Smav#define BP_SPAN(datablkszsec, indblkshift, level) \ 86286705Smav (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \ 87286705Smav (level) * (indblkshift - SPA_BLKPTRSHIFT))) 88286705Smav 89289362Smavstatic void byteswap_record(dmu_replay_record_t *drr); 90289362Smav 91286705Smavstruct send_thread_arg { 92286705Smav bqueue_t q; 93286705Smav dsl_dataset_t *ds; /* Dataset to traverse */ 94286705Smav uint64_t fromtxg; /* Traverse from this txg */ 95286705Smav int flags; /* flags to pass to traverse_dataset */ 96286705Smav int error_code; 97286705Smav boolean_t cancel; 98289362Smav zbookmark_phys_t resume; 99286705Smav}; 100286705Smav 101286705Smavstruct send_block_record { 102286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 103286705Smav blkptr_t bp; 104286705Smav zbookmark_phys_t zb; 105286705Smav uint8_t indblkshift; 106286705Smav uint16_t datablkszsec; 107286705Smav bqueue_node_t ln; 108286705Smav}; 109286705Smav 110168404Spjdstatic int 111235222Smmdump_bytes(dmu_sendarg_t *dsp, void *buf, int len) 112168404Spjd{ 113289362Smav dsl_dataset_t *ds = dmu_objset_ds(dsp->dsa_os); 114168404Spjd struct uio auio; 115168404Spjd struct iovec aiov; 116297509Smav 117297509Smav /* 118297509Smav * The code does not rely on this (len being a multiple of 8). We keep 119297509Smav * this assertion because of the corresponding assertion in 120297509Smav * receive_read(). Keeping this assertion ensures that we do not 121297509Smav * inadvertently break backwards compatibility (causing the assertion 122297509Smav * in receive_read() to trigger on old software). 123297509Smav * 124297509Smav * Removing the assertions could be rolled into a new feature that uses 125297509Smav * data that isn't 8-byte aligned; if the assertions were removed, a 126297509Smav * feature flag would have to be added. 127297509Smav */ 128297509Smav 129240415Smm ASSERT0(len % 8); 130168404Spjd 131168404Spjd aiov.iov_base = buf; 132168404Spjd aiov.iov_len = len; 133168404Spjd auio.uio_iov = &aiov; 134168404Spjd auio.uio_iovcnt = 1; 135168404Spjd auio.uio_resid = len; 136169170Spjd auio.uio_segflg = UIO_SYSSPACE; 137168404Spjd auio.uio_rw = UIO_WRITE; 138168404Spjd auio.uio_offset = (off_t)-1; 139235222Smm auio.uio_td = dsp->dsa_td; 140168404Spjd#ifdef _KERNEL 141235222Smm if (dsp->dsa_fp->f_type == DTYPE_VNODE) 142168404Spjd bwillwrite(); 143235222Smm dsp->dsa_err = fo_write(dsp->dsa_fp, &auio, dsp->dsa_td->td_ucred, 0, 144235222Smm dsp->dsa_td); 145168404Spjd#else 146168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 147235222Smm dsp->dsa_err = EOPNOTSUPP; 148168404Spjd#endif 149235222Smm mutex_enter(&ds->ds_sendstream_lock); 150235222Smm *dsp->dsa_off += len; 151235222Smm mutex_exit(&ds->ds_sendstream_lock); 152235222Smm 153235222Smm return (dsp->dsa_err); 154168404Spjd} 155168404Spjd 156286587Smav/* 157286587Smav * For all record types except BEGIN, fill in the checksum (overlaid in 158286587Smav * drr_u.drr_checksum.drr_checksum). The checksum verifies everything 159286587Smav * up to the start of the checksum itself. 160286587Smav */ 161168404Spjdstatic int 162286587Smavdump_record(dmu_sendarg_t *dsp, void *payload, int payload_len) 163286587Smav{ 164286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 165286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 166321610Smav (void) fletcher_4_incremental_native(dsp->dsa_drr, 167286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 168286587Smav &dsp->dsa_zc); 169307284Smav if (dsp->dsa_drr->drr_type == DRR_BEGIN) { 170307284Smav dsp->dsa_sent_begin = B_TRUE; 171307284Smav } else { 172286587Smav ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u. 173286587Smav drr_checksum.drr_checksum)); 174286587Smav dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc; 175286587Smav } 176307284Smav if (dsp->dsa_drr->drr_type == DRR_END) { 177307284Smav dsp->dsa_sent_end = B_TRUE; 178307284Smav } 179321610Smav (void) fletcher_4_incremental_native(&dsp->dsa_drr-> 180286587Smav drr_u.drr_checksum.drr_checksum, 181286587Smav sizeof (zio_cksum_t), &dsp->dsa_zc); 182286587Smav if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) 183286587Smav return (SET_ERROR(EINTR)); 184286587Smav if (payload_len != 0) { 185321610Smav (void) fletcher_4_incremental_native(payload, payload_len, 186286587Smav &dsp->dsa_zc); 187286587Smav if (dump_bytes(dsp, payload, payload_len) != 0) 188286587Smav return (SET_ERROR(EINTR)); 189286587Smav } 190286587Smav return (0); 191286587Smav} 192286587Smav 193294815Smav/* 194294815Smav * Fill in the drr_free struct, or perform aggregation if the previous record is 195294815Smav * also a free record, and the two are adjacent. 196294815Smav * 197294815Smav * Note that we send free records even for a full send, because we want to be 198294815Smav * able to receive a full send as a clone, which requires a list of all the free 199294815Smav * and freeobject records that were generated on the source. 200294815Smav */ 201286587Smavstatic int 202235222Smmdump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 203168404Spjd uint64_t length) 204168404Spjd{ 205235222Smm struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); 206219089Spjd 207253821Sdelphij /* 208253821Sdelphij * When we receive a free record, dbuf_free_range() assumes 209253821Sdelphij * that the receiving system doesn't have any dbufs in the range 210253821Sdelphij * being freed. This is always true because there is a one-record 211253821Sdelphij * constraint: we only send one WRITE record for any given 212289362Smav * object,offset. We know that the one-record constraint is 213253821Sdelphij * true because we always send data in increasing order by 214253821Sdelphij * object,offset. 215253821Sdelphij * 216253821Sdelphij * If the increasing-order constraint ever changes, we should find 217253821Sdelphij * another way to assert that the one-record constraint is still 218253821Sdelphij * satisfied. 219253821Sdelphij */ 220253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 221253821Sdelphij (object == dsp->dsa_last_data_object && 222253821Sdelphij offset > dsp->dsa_last_data_offset)); 223253821Sdelphij 224237458Smm if (length != -1ULL && offset + length < offset) 225237458Smm length = -1ULL; 226237458Smm 227219089Spjd /* 228219089Spjd * If there is a pending op, but it's not PENDING_FREE, push it out, 229219089Spjd * since free block aggregation can only be done for blocks of the 230219089Spjd * same type (i.e., DRR_FREE records can only be aggregated with 231219089Spjd * other DRR_FREE records. DRR_FREEOBJECTS records can only be 232219089Spjd * aggregated with other DRR_FREEOBJECTS records. 233219089Spjd */ 234235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 235235222Smm dsp->dsa_pending_op != PENDING_FREE) { 236286587Smav if (dump_record(dsp, NULL, 0) != 0) 237249195Smm return (SET_ERROR(EINTR)); 238235222Smm dsp->dsa_pending_op = PENDING_NONE; 239219089Spjd } 240219089Spjd 241235222Smm if (dsp->dsa_pending_op == PENDING_FREE) { 242219089Spjd /* 243219089Spjd * There should never be a PENDING_FREE if length is -1 244219089Spjd * (because dump_dnode is the only place where this 245219089Spjd * function is called with a -1, and only after flushing 246219089Spjd * any pending record). 247219089Spjd */ 248219089Spjd ASSERT(length != -1ULL); 249219089Spjd /* 250219089Spjd * Check to see whether this free block can be aggregated 251219089Spjd * with pending one. 252219089Spjd */ 253219089Spjd if (drrf->drr_object == object && drrf->drr_offset + 254219089Spjd drrf->drr_length == offset) { 255219089Spjd drrf->drr_length += length; 256219089Spjd return (0); 257219089Spjd } else { 258219089Spjd /* not a continuation. Push out pending record */ 259286587Smav if (dump_record(dsp, NULL, 0) != 0) 260249195Smm return (SET_ERROR(EINTR)); 261235222Smm dsp->dsa_pending_op = PENDING_NONE; 262219089Spjd } 263219089Spjd } 264219089Spjd /* create a FREE record and make it pending */ 265235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 266235222Smm dsp->dsa_drr->drr_type = DRR_FREE; 267219089Spjd drrf->drr_object = object; 268219089Spjd drrf->drr_offset = offset; 269219089Spjd drrf->drr_length = length; 270235222Smm drrf->drr_toguid = dsp->dsa_toguid; 271219089Spjd if (length == -1ULL) { 272286587Smav if (dump_record(dsp, NULL, 0) != 0) 273249195Smm return (SET_ERROR(EINTR)); 274219089Spjd } else { 275235222Smm dsp->dsa_pending_op = PENDING_FREE; 276219089Spjd } 277168404Spjd 278168404Spjd return (0); 279168404Spjd} 280168404Spjd 281168404Spjdstatic int 282268075Sdelphijdump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, 283321535Smav uint64_t object, uint64_t offset, int lsize, int psize, const blkptr_t *bp, 284321535Smav void *data) 285168404Spjd{ 286321535Smav uint64_t payload_size; 287235222Smm struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); 288219089Spjd 289253821Sdelphij /* 290253821Sdelphij * We send data in increasing object, offset order. 291253821Sdelphij * See comment in dump_free() for details. 292253821Sdelphij */ 293253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 294253821Sdelphij (object == dsp->dsa_last_data_object && 295253821Sdelphij offset > dsp->dsa_last_data_offset)); 296253821Sdelphij dsp->dsa_last_data_object = object; 297321535Smav dsp->dsa_last_data_offset = offset + lsize - 1; 298219089Spjd 299219089Spjd /* 300219089Spjd * If there is any kind of pending aggregation (currently either 301219089Spjd * a grouping of free objects or free blocks), push it out to 302219089Spjd * the stream, since aggregation can't be done across operations 303219089Spjd * of different types. 304219089Spjd */ 305235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 306286587Smav if (dump_record(dsp, NULL, 0) != 0) 307249195Smm return (SET_ERROR(EINTR)); 308235222Smm dsp->dsa_pending_op = PENDING_NONE; 309219089Spjd } 310286587Smav /* write a WRITE record */ 311235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 312235222Smm dsp->dsa_drr->drr_type = DRR_WRITE; 313219089Spjd drrw->drr_object = object; 314219089Spjd drrw->drr_type = type; 315219089Spjd drrw->drr_offset = offset; 316235222Smm drrw->drr_toguid = dsp->dsa_toguid; 317321535Smav drrw->drr_logical_size = lsize; 318321535Smav 319321535Smav /* only set the compression fields if the buf is compressed */ 320321535Smav if (lsize != psize) { 321321535Smav ASSERT(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_COMPRESSED); 322321535Smav ASSERT(!BP_IS_EMBEDDED(bp)); 323321535Smav ASSERT(!BP_SHOULD_BYTESWAP(bp)); 324321535Smav ASSERT(!DMU_OT_IS_METADATA(BP_GET_TYPE(bp))); 325321535Smav ASSERT3U(BP_GET_COMPRESS(bp), !=, ZIO_COMPRESS_OFF); 326321535Smav ASSERT3S(psize, >, 0); 327321535Smav ASSERT3S(lsize, >=, psize); 328321535Smav 329321535Smav drrw->drr_compressiontype = BP_GET_COMPRESS(bp); 330321535Smav drrw->drr_compressed_size = psize; 331321535Smav payload_size = drrw->drr_compressed_size; 332321535Smav } else { 333321535Smav payload_size = drrw->drr_logical_size; 334321535Smav } 335321535Smav 336274337Sdelphij if (bp == NULL || BP_IS_EMBEDDED(bp)) { 337268075Sdelphij /* 338274337Sdelphij * There's no pre-computed checksum for partial-block 339274337Sdelphij * writes or embedded BP's, so (like 340274337Sdelphij * fletcher4-checkummed blocks) userland will have to 341274337Sdelphij * compute a dedup-capable checksum itself. 342268075Sdelphij */ 343268075Sdelphij drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; 344268075Sdelphij } else { 345268075Sdelphij drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); 346289422Smav if (zio_checksum_table[drrw->drr_checksumtype].ci_flags & 347289422Smav ZCHECKSUM_FLAG_DEDUP) 348268075Sdelphij drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; 349268075Sdelphij DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); 350268075Sdelphij DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); 351268075Sdelphij DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); 352268075Sdelphij drrw->drr_key.ddk_cksum = bp->blk_cksum; 353268075Sdelphij } 354168404Spjd 355321535Smav if (dump_record(dsp, data, payload_size) != 0) 356249195Smm return (SET_ERROR(EINTR)); 357219089Spjd return (0); 358219089Spjd} 359219089Spjd 360219089Spjdstatic int 361268075Sdelphijdump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 362268075Sdelphij int blksz, const blkptr_t *bp) 363268075Sdelphij{ 364268075Sdelphij char buf[BPE_PAYLOAD_SIZE]; 365268075Sdelphij struct drr_write_embedded *drrw = 366268075Sdelphij &(dsp->dsa_drr->drr_u.drr_write_embedded); 367268075Sdelphij 368268075Sdelphij if (dsp->dsa_pending_op != PENDING_NONE) { 369286587Smav if (dump_record(dsp, NULL, 0) != 0) 370268075Sdelphij return (EINTR); 371268075Sdelphij dsp->dsa_pending_op = PENDING_NONE; 372268075Sdelphij } 373268075Sdelphij 374268075Sdelphij ASSERT(BP_IS_EMBEDDED(bp)); 375268075Sdelphij 376268075Sdelphij bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 377268075Sdelphij dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; 378268075Sdelphij drrw->drr_object = object; 379268075Sdelphij drrw->drr_offset = offset; 380268075Sdelphij drrw->drr_length = blksz; 381268075Sdelphij drrw->drr_toguid = dsp->dsa_toguid; 382268075Sdelphij drrw->drr_compression = BP_GET_COMPRESS(bp); 383268075Sdelphij drrw->drr_etype = BPE_GET_ETYPE(bp); 384268075Sdelphij drrw->drr_lsize = BPE_GET_LSIZE(bp); 385268075Sdelphij drrw->drr_psize = BPE_GET_PSIZE(bp); 386268075Sdelphij 387268075Sdelphij decode_embedded_bp_compressed(bp, buf); 388268075Sdelphij 389286587Smav if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) 390268075Sdelphij return (EINTR); 391268075Sdelphij return (0); 392268075Sdelphij} 393268075Sdelphij 394268075Sdelphijstatic int 395235222Smmdump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) 396219089Spjd{ 397235222Smm struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); 398219089Spjd 399235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 400286587Smav if (dump_record(dsp, NULL, 0) != 0) 401249195Smm return (SET_ERROR(EINTR)); 402235222Smm dsp->dsa_pending_op = PENDING_NONE; 403219089Spjd } 404219089Spjd 405219089Spjd /* write a SPILL record */ 406235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 407235222Smm dsp->dsa_drr->drr_type = DRR_SPILL; 408219089Spjd drrs->drr_object = object; 409219089Spjd drrs->drr_length = blksz; 410235222Smm drrs->drr_toguid = dsp->dsa_toguid; 411219089Spjd 412286587Smav if (dump_record(dsp, data, blksz) != 0) 413249195Smm return (SET_ERROR(EINTR)); 414168404Spjd return (0); 415168404Spjd} 416168404Spjd 417168404Spjdstatic int 418235222Smmdump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) 419168404Spjd{ 420235222Smm struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); 421219089Spjd 422219089Spjd /* 423219089Spjd * If there is a pending op, but it's not PENDING_FREEOBJECTS, 424219089Spjd * push it out, since free block aggregation can only be done for 425219089Spjd * blocks of the same type (i.e., DRR_FREE records can only be 426219089Spjd * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records 427219089Spjd * can only be aggregated with other DRR_FREEOBJECTS records. 428219089Spjd */ 429235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 430235222Smm dsp->dsa_pending_op != PENDING_FREEOBJECTS) { 431286587Smav if (dump_record(dsp, NULL, 0) != 0) 432249195Smm return (SET_ERROR(EINTR)); 433235222Smm dsp->dsa_pending_op = PENDING_NONE; 434219089Spjd } 435235222Smm if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { 436219089Spjd /* 437219089Spjd * See whether this free object array can be aggregated 438219089Spjd * with pending one 439219089Spjd */ 440219089Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { 441219089Spjd drrfo->drr_numobjs += numobjs; 442219089Spjd return (0); 443219089Spjd } else { 444219089Spjd /* can't be aggregated. Push out pending record */ 445286587Smav if (dump_record(dsp, NULL, 0) != 0) 446249195Smm return (SET_ERROR(EINTR)); 447235222Smm dsp->dsa_pending_op = PENDING_NONE; 448219089Spjd } 449219089Spjd } 450219089Spjd 451168404Spjd /* write a FREEOBJECTS record */ 452235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 453235222Smm dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; 454219089Spjd drrfo->drr_firstobj = firstobj; 455219089Spjd drrfo->drr_numobjs = numobjs; 456235222Smm drrfo->drr_toguid = dsp->dsa_toguid; 457168404Spjd 458235222Smm dsp->dsa_pending_op = PENDING_FREEOBJECTS; 459219089Spjd 460168404Spjd return (0); 461168404Spjd} 462168404Spjd 463168404Spjdstatic int 464235222Smmdump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) 465168404Spjd{ 466235222Smm struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); 467219089Spjd 468289362Smav if (object < dsp->dsa_resume_object) { 469289362Smav /* 470289362Smav * Note: when resuming, we will visit all the dnodes in 471289362Smav * the block of dnodes that we are resuming from. In 472289362Smav * this case it's unnecessary to send the dnodes prior to 473289362Smav * the one we are resuming from. We should be at most one 474289362Smav * block's worth of dnodes behind the resume point. 475289362Smav */ 476289362Smav ASSERT3U(dsp->dsa_resume_object - object, <, 477289362Smav 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT)); 478289362Smav return (0); 479289362Smav } 480289362Smav 481168404Spjd if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) 482235222Smm return (dump_freeobjects(dsp, object, 1)); 483168404Spjd 484235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 485286587Smav if (dump_record(dsp, NULL, 0) != 0) 486249195Smm return (SET_ERROR(EINTR)); 487235222Smm dsp->dsa_pending_op = PENDING_NONE; 488219089Spjd } 489219089Spjd 490168404Spjd /* write an OBJECT record */ 491235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 492235222Smm dsp->dsa_drr->drr_type = DRR_OBJECT; 493219089Spjd drro->drr_object = object; 494219089Spjd drro->drr_type = dnp->dn_type; 495219089Spjd drro->drr_bonustype = dnp->dn_bonustype; 496219089Spjd drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 497219089Spjd drro->drr_bonuslen = dnp->dn_bonuslen; 498219089Spjd drro->drr_checksumtype = dnp->dn_checksum; 499219089Spjd drro->drr_compress = dnp->dn_compress; 500235222Smm drro->drr_toguid = dsp->dsa_toguid; 501168404Spjd 502274337Sdelphij if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 503274337Sdelphij drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) 504274337Sdelphij drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; 505274337Sdelphij 506286587Smav if (dump_record(dsp, DN_BONUS(dnp), 507286587Smav P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) { 508249195Smm return (SET_ERROR(EINTR)); 509286587Smav } 510168404Spjd 511253821Sdelphij /* Free anything past the end of the file. */ 512235222Smm if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * 513253821Sdelphij (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) 514249195Smm return (SET_ERROR(EINTR)); 515248571Smm if (dsp->dsa_err != 0) 516249195Smm return (SET_ERROR(EINTR)); 517168404Spjd return (0); 518168404Spjd} 519168404Spjd 520268075Sdelphijstatic boolean_t 521268075Sdelphijbackup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) 522268075Sdelphij{ 523268075Sdelphij if (!BP_IS_EMBEDDED(bp)) 524268075Sdelphij return (B_FALSE); 525268075Sdelphij 526268075Sdelphij /* 527268075Sdelphij * Compression function must be legacy, or explicitly enabled. 528268075Sdelphij */ 529268075Sdelphij if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && 530321535Smav !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LZ4))) 531268075Sdelphij return (B_FALSE); 532268075Sdelphij 533268075Sdelphij /* 534268075Sdelphij * Embed type must be explicitly enabled. 535268075Sdelphij */ 536268075Sdelphij switch (BPE_GET_ETYPE(bp)) { 537268075Sdelphij case BP_EMBEDDED_TYPE_DATA: 538268075Sdelphij if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) 539268075Sdelphij return (B_TRUE); 540268075Sdelphij break; 541268075Sdelphij default: 542268075Sdelphij return (B_FALSE); 543268075Sdelphij } 544268075Sdelphij return (B_FALSE); 545268075Sdelphij} 546268075Sdelphij 547286705Smav/* 548286705Smav * This is the callback function to traverse_dataset that acts as the worker 549286705Smav * thread for dmu_send_impl. 550286705Smav */ 551286705Smav/*ARGSUSED*/ 552286705Smavstatic int 553286705Smavsend_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 554286705Smav const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg) 555286705Smav{ 556286705Smav struct send_thread_arg *sta = arg; 557286705Smav struct send_block_record *record; 558286705Smav uint64_t record_size; 559286705Smav int err = 0; 560168404Spjd 561289362Smav ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || 562289362Smav zb->zb_object >= sta->resume.zb_object); 563289362Smav 564286705Smav if (sta->cancel) 565286705Smav return (SET_ERROR(EINTR)); 566286705Smav 567286705Smav if (bp == NULL) { 568286705Smav ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL); 569286705Smav return (0); 570286705Smav } else if (zb->zb_level < 0) { 571286705Smav return (0); 572286705Smav } 573286705Smav 574286705Smav record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP); 575286705Smav record->eos_marker = B_FALSE; 576286705Smav record->bp = *bp; 577286705Smav record->zb = *zb; 578286705Smav record->indblkshift = dnp->dn_indblkshift; 579286705Smav record->datablkszsec = dnp->dn_datablkszsec; 580286705Smav record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 581286705Smav bqueue_enqueue(&sta->q, record, record_size); 582286705Smav 583286705Smav return (err); 584286705Smav} 585286705Smav 586286705Smav/* 587286705Smav * This function kicks off the traverse_dataset. It also handles setting the 588286705Smav * error code of the thread in case something goes wrong, and pushes the End of 589286705Smav * Stream record when the traverse_dataset call has finished. If there is no 590286705Smav * dataset to traverse, the thread immediately pushes End of Stream marker. 591286705Smav */ 592286705Smavstatic void 593286705Smavsend_traverse_thread(void *arg) 594286705Smav{ 595286705Smav struct send_thread_arg *st_arg = arg; 596286705Smav int err; 597286705Smav struct send_block_record *data; 598286705Smav 599286705Smav if (st_arg->ds != NULL) { 600289362Smav err = traverse_dataset_resume(st_arg->ds, 601289362Smav st_arg->fromtxg, &st_arg->resume, 602289362Smav st_arg->flags, send_cb, st_arg); 603289362Smav 604286705Smav if (err != EINTR) 605286705Smav st_arg->error_code = err; 606286705Smav } 607286705Smav data = kmem_zalloc(sizeof (*data), KM_SLEEP); 608286705Smav data->eos_marker = B_TRUE; 609286705Smav bqueue_enqueue(&st_arg->q, data, 1); 610286705Smav thread_exit(); 611286705Smav} 612286705Smav 613286705Smav/* 614286705Smav * This function actually handles figuring out what kind of record needs to be 615286705Smav * dumped, reading the data (which has hopefully been prefetched), and calling 616286705Smav * the appropriate helper function. 617286705Smav */ 618168404Spjdstatic int 619286705Smavdo_dump(dmu_sendarg_t *dsa, struct send_block_record *data) 620168404Spjd{ 621286705Smav dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os); 622286705Smav const blkptr_t *bp = &data->bp; 623286705Smav const zbookmark_phys_t *zb = &data->zb; 624286705Smav uint8_t indblkshift = data->indblkshift; 625286705Smav uint16_t dblkszsec = data->datablkszsec; 626286705Smav spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 627168404Spjd dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; 628168404Spjd int err = 0; 629168404Spjd 630286705Smav ASSERT3U(zb->zb_level, >=, 0); 631168404Spjd 632289362Smav ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || 633289362Smav zb->zb_object >= dsa->dsa_resume_object); 634289362Smav 635219089Spjd if (zb->zb_object != DMU_META_DNODE_OBJECT && 636219089Spjd DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { 637209962Smm return (0); 638260150Sdelphij } else if (BP_IS_HOLE(bp) && 639260150Sdelphij zb->zb_object == DMU_META_DNODE_OBJECT) { 640286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 641208047Smm uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; 642286705Smav err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT); 643260150Sdelphij } else if (BP_IS_HOLE(bp)) { 644286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 645286705Smav uint64_t offset = zb->zb_blkid * span; 646286705Smav err = dump_free(dsa, zb->zb_object, offset, span); 647208047Smm } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { 648208047Smm return (0); 649208047Smm } else if (type == DMU_OT_DNODE) { 650168404Spjd int blksz = BP_GET_LSIZE(bp); 651275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 652208047Smm arc_buf_t *abuf; 653168404Spjd 654286705Smav ASSERT0(zb->zb_level); 655286705Smav 656246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 657246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 658246666Smm &aflags, zb) != 0) 659249195Smm return (SET_ERROR(EIO)); 660208047Smm 661286705Smav dnode_phys_t *blk = abuf->b_data; 662286705Smav uint64_t dnobj = zb->zb_blkid * (blksz >> DNODE_SHIFT); 663286705Smav for (int i = 0; i < blksz >> DNODE_SHIFT; i++) { 664286705Smav err = dump_dnode(dsa, dnobj + i, blk + i); 665248571Smm if (err != 0) 666168404Spjd break; 667168404Spjd } 668307265Smav arc_buf_destroy(abuf, &abuf); 669219089Spjd } else if (type == DMU_OT_SA) { 670275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 671208047Smm arc_buf_t *abuf; 672168404Spjd int blksz = BP_GET_LSIZE(bp); 673168404Spjd 674246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 675246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 676246666Smm &aflags, zb) != 0) 677249195Smm return (SET_ERROR(EIO)); 678168404Spjd 679286705Smav err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data); 680307265Smav arc_buf_destroy(abuf, &abuf); 681286705Smav } else if (backup_do_embed(dsa, bp)) { 682268075Sdelphij /* it's an embedded level-0 block of a regular object */ 683286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 684286705Smav ASSERT0(zb->zb_level); 685286705Smav err = dump_write_embedded(dsa, zb->zb_object, 686268075Sdelphij zb->zb_blkid * blksz, blksz, bp); 687286705Smav } else { 688286705Smav /* it's a level-0 block of a regular object */ 689275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 690219089Spjd arc_buf_t *abuf; 691286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 692274337Sdelphij uint64_t offset; 693219089Spjd 694321535Smav /* 695321535Smav * If we have large blocks stored on disk but the send flags 696321535Smav * don't allow us to send large blocks, we split the data from 697321535Smav * the arc buf into chunks. 698321535Smav */ 699321535Smav boolean_t split_large_blocks = blksz > SPA_OLD_MAXBLOCKSIZE && 700321535Smav !(dsa->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS); 701321535Smav /* 702321535Smav * We should only request compressed data from the ARC if all 703321535Smav * the following are true: 704321535Smav * - stream compression was requested 705321535Smav * - we aren't splitting large blocks into smaller chunks 706321535Smav * - the data won't need to be byteswapped before sending 707321535Smav * - this isn't an embedded block 708321535Smav * - this isn't metadata (if receiving on a different endian 709321535Smav * system it can be byteswapped more easily) 710321535Smav */ 711321535Smav boolean_t request_compressed = 712321535Smav (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_COMPRESSED) && 713321535Smav !split_large_blocks && !BP_SHOULD_BYTESWAP(bp) && 714321535Smav !BP_IS_EMBEDDED(bp) && !DMU_OT_IS_METADATA(BP_GET_TYPE(bp)); 715321535Smav 716260183Sdelphij ASSERT0(zb->zb_level); 717289362Smav ASSERT(zb->zb_object > dsa->dsa_resume_object || 718289362Smav (zb->zb_object == dsa->dsa_resume_object && 719289362Smav zb->zb_blkid * blksz >= dsa->dsa_resume_offset)); 720289362Smav 721321535Smav ASSERT0(zb->zb_level); 722321535Smav ASSERT(zb->zb_object > dsa->dsa_resume_object || 723321535Smav (zb->zb_object == dsa->dsa_resume_object && 724321535Smav zb->zb_blkid * blksz >= dsa->dsa_resume_offset)); 725321535Smav 726321535Smav ASSERT3U(blksz, ==, BP_GET_LSIZE(bp)); 727321535Smav 728321535Smav enum zio_flag zioflags = ZIO_FLAG_CANFAIL; 729321535Smav if (request_compressed) 730321535Smav zioflags |= ZIO_FLAG_RAW; 731246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 732321535Smav ZIO_PRIORITY_ASYNC_READ, zioflags, &aflags, zb) != 0) { 733228103Smm if (zfs_send_corrupt_data) { 734228103Smm /* Send a block filled with 0x"zfs badd bloc" */ 735321535Smav abuf = arc_alloc_buf(spa, &abuf, ARC_BUFC_DATA, 736321535Smav blksz); 737228103Smm uint64_t *ptr; 738228103Smm for (ptr = abuf->b_data; 739228103Smm (char *)ptr < (char *)abuf->b_data + blksz; 740228103Smm ptr++) 741286554Smav *ptr = 0x2f5baddb10cULL; 742228103Smm } else { 743249195Smm return (SET_ERROR(EIO)); 744228103Smm } 745228103Smm } 746219089Spjd 747274337Sdelphij offset = zb->zb_blkid * blksz; 748274337Sdelphij 749321535Smav if (split_large_blocks) { 750321535Smav ASSERT3U(arc_get_compression(abuf), ==, 751321535Smav ZIO_COMPRESS_OFF); 752274337Sdelphij char *buf = abuf->b_data; 753274337Sdelphij while (blksz > 0 && err == 0) { 754274337Sdelphij int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); 755286705Smav err = dump_write(dsa, type, zb->zb_object, 756321535Smav offset, n, n, NULL, buf); 757274337Sdelphij offset += n; 758274337Sdelphij buf += n; 759274337Sdelphij blksz -= n; 760274337Sdelphij } 761274337Sdelphij } else { 762321535Smav err = dump_write(dsa, type, zb->zb_object, offset, 763321535Smav blksz, arc_buf_size(abuf), bp, abuf->b_data); 764274337Sdelphij } 765307265Smav arc_buf_destroy(abuf, &abuf); 766168404Spjd } 767168404Spjd 768168404Spjd ASSERT(err == 0 || err == EINTR); 769168404Spjd return (err); 770168404Spjd} 771168404Spjd 772248571Smm/* 773286705Smav * Pop the new data off the queue, and free the old data. 774248571Smm */ 775286705Smavstatic struct send_block_record * 776286705Smavget_next_record(bqueue_t *bq, struct send_block_record *data) 777286705Smav{ 778286705Smav struct send_block_record *tmp = bqueue_dequeue(bq); 779286705Smav kmem_free(data, sizeof (*data)); 780286705Smav return (tmp); 781286705Smav} 782286705Smav 783286705Smav/* 784286705Smav * Actually do the bulk of the work in a zfs send. 785286705Smav * 786286705Smav * Note: Releases dp using the specified tag. 787286705Smav */ 788248571Smmstatic int 789286705Smavdmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, 790321535Smav zfs_bookmark_phys_t *ancestor_zb, boolean_t is_clone, 791321535Smav boolean_t embedok, boolean_t large_block_ok, boolean_t compressok, 792321535Smav int outfd, uint64_t resumeobj, uint64_t resumeoff, 793248571Smm#ifdef illumos 794289362Smav vnode_t *vp, offset_t *off) 795248571Smm#else 796289362Smav struct file *fp, offset_t *off) 797248571Smm#endif 798168404Spjd{ 799248571Smm objset_t *os; 800168404Spjd dmu_replay_record_t *drr; 801235222Smm dmu_sendarg_t *dsp; 802168404Spjd int err; 803185029Spjd uint64_t fromtxg = 0; 804268075Sdelphij uint64_t featureflags = 0; 805289362Smav struct send_thread_arg to_arg = { 0 }; 806168404Spjd 807286705Smav err = dmu_objset_from_ds(to_ds, &os); 808248571Smm if (err != 0) { 809248571Smm dsl_pool_rele(dp, tag); 810248571Smm return (err); 811185029Spjd } 812185029Spjd 813168404Spjd drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); 814168404Spjd drr->drr_type = DRR_BEGIN; 815168404Spjd drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; 816219089Spjd DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, 817219089Spjd DMU_SUBSTREAM); 818219089Spjd 819219089Spjd#ifdef _KERNEL 820248571Smm if (dmu_objset_type(os) == DMU_OST_ZFS) { 821219089Spjd uint64_t version; 822248571Smm if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { 823235222Smm kmem_free(drr, sizeof (dmu_replay_record_t)); 824248571Smm dsl_pool_rele(dp, tag); 825249195Smm return (SET_ERROR(EINVAL)); 826235222Smm } 827248571Smm if (version >= ZPL_VERSION_SA) { 828268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; 829219089Spjd } 830219089Spjd } 831219089Spjd#endif 832219089Spjd 833286708Smav if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) 834274337Sdelphij featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; 835268075Sdelphij if (embedok && 836268075Sdelphij spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { 837268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; 838268075Sdelphij if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 839321535Smav featureflags |= DMU_BACKUP_FEATURE_LZ4; 840268075Sdelphij } 841321535Smav if (compressok) { 842321535Smav featureflags |= DMU_BACKUP_FEATURE_COMPRESSED; 843321535Smav } 844321535Smav if ((featureflags & 845321535Smav (DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_COMPRESSED)) != 846321535Smav 0 && spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) { 847321535Smav featureflags |= DMU_BACKUP_FEATURE_LZ4; 848321535Smav } 849268075Sdelphij 850289362Smav if (resumeobj != 0 || resumeoff != 0) { 851289362Smav featureflags |= DMU_BACKUP_FEATURE_RESUMING; 852289362Smav } 853289362Smav 854268075Sdelphij DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, 855268075Sdelphij featureflags); 856268075Sdelphij 857168404Spjd drr->drr_u.drr_begin.drr_creation_time = 858286705Smav dsl_dataset_phys(to_ds)->ds_creation_time; 859248571Smm drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); 860260183Sdelphij if (is_clone) 861185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; 862286705Smav drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid; 863286705Smav if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET) 864185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; 865296516Smav if (zfs_send_set_freerecords_bit) 866296516Smav drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_FREERECORDS; 867185029Spjd 868286705Smav if (ancestor_zb != NULL) { 869286705Smav drr->drr_u.drr_begin.drr_fromguid = 870286705Smav ancestor_zb->zbm_guid; 871286705Smav fromtxg = ancestor_zb->zbm_creation_txg; 872260183Sdelphij } 873286705Smav dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname); 874286705Smav if (!to_ds->ds_is_snapshot) { 875260183Sdelphij (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", 876260183Sdelphij sizeof (drr->drr_u.drr_begin.drr_toname)); 877248571Smm } 878185029Spjd 879235222Smm dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); 880168404Spjd 881235222Smm dsp->dsa_drr = drr; 882235222Smm dsp->dsa_outfd = outfd; 883235222Smm dsp->dsa_proc = curproc; 884235222Smm dsp->dsa_td = curthread; 885235222Smm dsp->dsa_fp = fp; 886248571Smm dsp->dsa_os = os; 887235222Smm dsp->dsa_off = off; 888286705Smav dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid; 889235222Smm dsp->dsa_pending_op = PENDING_NONE; 890268075Sdelphij dsp->dsa_featureflags = featureflags; 891289362Smav dsp->dsa_resume_object = resumeobj; 892289362Smav dsp->dsa_resume_offset = resumeoff; 893235222Smm 894286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 895286705Smav list_insert_head(&to_ds->ds_sendstreams, dsp); 896286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 897235222Smm 898286705Smav dsl_dataset_long_hold(to_ds, FTAG); 899249042Smm dsl_pool_rele(dp, tag); 900249042Smm 901289362Smav void *payload = NULL; 902289362Smav size_t payload_len = 0; 903289362Smav if (resumeobj != 0 || resumeoff != 0) { 904289362Smav dmu_object_info_t to_doi; 905289362Smav err = dmu_object_info(os, resumeobj, &to_doi); 906289362Smav if (err != 0) 907289362Smav goto out; 908289362Smav SET_BOOKMARK(&to_arg.resume, to_ds->ds_object, resumeobj, 0, 909289362Smav resumeoff / to_doi.doi_data_block_size); 910289362Smav 911289362Smav nvlist_t *nvl = fnvlist_alloc(); 912289362Smav fnvlist_add_uint64(nvl, "resume_object", resumeobj); 913289362Smav fnvlist_add_uint64(nvl, "resume_offset", resumeoff); 914289362Smav payload = fnvlist_pack(nvl, &payload_len); 915289362Smav drr->drr_payloadlen = payload_len; 916289362Smav fnvlist_free(nvl); 917289362Smav } 918289362Smav 919289362Smav err = dump_record(dsp, payload, payload_len); 920289362Smav fnvlist_pack_free(payload, payload_len); 921289362Smav if (err != 0) { 922235222Smm err = dsp->dsa_err; 923235222Smm goto out; 924168404Spjd } 925168404Spjd 926286705Smav err = bqueue_init(&to_arg.q, zfs_send_queue_length, 927286705Smav offsetof(struct send_block_record, ln)); 928286705Smav to_arg.error_code = 0; 929286705Smav to_arg.cancel = B_FALSE; 930286705Smav to_arg.ds = to_ds; 931286705Smav to_arg.fromtxg = fromtxg; 932286705Smav to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH; 933287280Sdelphij (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, &p0, 934286705Smav TS_RUN, minclsyspri); 935168404Spjd 936286705Smav struct send_block_record *to_data; 937286705Smav to_data = bqueue_dequeue(&to_arg.q); 938286705Smav 939286705Smav while (!to_data->eos_marker && err == 0) { 940286705Smav err = do_dump(dsp, to_data); 941286705Smav to_data = get_next_record(&to_arg.q, to_data); 942286705Smav if (issig(JUSTLOOKING) && issig(FORREAL)) 943286705Smav err = EINTR; 944286705Smav } 945286705Smav 946286705Smav if (err != 0) { 947286705Smav to_arg.cancel = B_TRUE; 948286705Smav while (!to_data->eos_marker) { 949286705Smav to_data = get_next_record(&to_arg.q, to_data); 950286705Smav } 951286705Smav } 952286705Smav kmem_free(to_data, sizeof (*to_data)); 953286705Smav 954286705Smav bqueue_destroy(&to_arg.q); 955286705Smav 956286705Smav if (err == 0 && to_arg.error_code != 0) 957286705Smav err = to_arg.error_code; 958286705Smav 959286705Smav if (err != 0) 960286705Smav goto out; 961286705Smav 962235222Smm if (dsp->dsa_pending_op != PENDING_NONE) 963286587Smav if (dump_record(dsp, NULL, 0) != 0) 964249195Smm err = SET_ERROR(EINTR); 965219089Spjd 966248571Smm if (err != 0) { 967248571Smm if (err == EINTR && dsp->dsa_err != 0) 968235222Smm err = dsp->dsa_err; 969235222Smm goto out; 970168404Spjd } 971168404Spjd 972168404Spjd bzero(drr, sizeof (dmu_replay_record_t)); 973168404Spjd drr->drr_type = DRR_END; 974235222Smm drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; 975235222Smm drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; 976168404Spjd 977286705Smav if (dump_record(dsp, NULL, 0) != 0) 978235222Smm err = dsp->dsa_err; 979168404Spjd 980235222Smmout: 981286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 982286705Smav list_remove(&to_ds->ds_sendstreams, dsp); 983286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 984235222Smm 985307284Smav VERIFY(err != 0 || (dsp->dsa_sent_begin && dsp->dsa_sent_end)); 986307284Smav 987168404Spjd kmem_free(drr, sizeof (dmu_replay_record_t)); 988235222Smm kmem_free(dsp, sizeof (dmu_sendarg_t)); 989168404Spjd 990286705Smav dsl_dataset_long_rele(to_ds, FTAG); 991248571Smm 992235222Smm return (err); 993168404Spjd} 994168404Spjd 995228103Smmint 996248571Smmdmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, 997321535Smav boolean_t embedok, boolean_t large_block_ok, boolean_t compressok, 998248571Smm#ifdef illumos 999274337Sdelphij int outfd, vnode_t *vp, offset_t *off) 1000248571Smm#else 1001274337Sdelphij int outfd, struct file *fp, offset_t *off) 1002248571Smm#endif 1003228103Smm{ 1004248571Smm dsl_pool_t *dp; 1005248571Smm dsl_dataset_t *ds; 1006248571Smm dsl_dataset_t *fromds = NULL; 1007248571Smm int err; 1008248571Smm 1009248571Smm err = dsl_pool_hold(pool, FTAG, &dp); 1010248571Smm if (err != 0) 1011248571Smm return (err); 1012248571Smm 1013248571Smm err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); 1014248571Smm if (err != 0) { 1015248571Smm dsl_pool_rele(dp, FTAG); 1016248571Smm return (err); 1017248571Smm } 1018248571Smm 1019248571Smm if (fromsnap != 0) { 1020260183Sdelphij zfs_bookmark_phys_t zb; 1021260183Sdelphij boolean_t is_clone; 1022260183Sdelphij 1023248571Smm err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); 1024248571Smm if (err != 0) { 1025248571Smm dsl_dataset_rele(ds, FTAG); 1026248571Smm dsl_pool_rele(dp, FTAG); 1027248571Smm return (err); 1028248571Smm } 1029260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 1030260183Sdelphij err = SET_ERROR(EXDEV); 1031275782Sdelphij zb.zbm_creation_time = 1032275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 1033275782Sdelphij zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; 1034275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 1035260183Sdelphij is_clone = (fromds->ds_dir != ds->ds_dir); 1036260183Sdelphij dsl_dataset_rele(fromds, FTAG); 1037274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 1038321535Smav embedok, large_block_ok, compressok, outfd, 0, 0, fp, off); 1039260183Sdelphij } else { 1040274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 1041321535Smav embedok, large_block_ok, compressok, outfd, 0, 0, fp, off); 1042248571Smm } 1043260183Sdelphij dsl_dataset_rele(ds, FTAG); 1044260183Sdelphij return (err); 1045248571Smm} 1046248571Smm 1047248571Smmint 1048289362Smavdmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok, 1049321535Smav boolean_t large_block_ok, boolean_t compressok, int outfd, 1050321535Smav uint64_t resumeobj, uint64_t resumeoff, 1051248571Smm#ifdef illumos 1052289362Smav vnode_t *vp, offset_t *off) 1053248571Smm#else 1054289362Smav struct file *fp, offset_t *off) 1055248571Smm#endif 1056248571Smm{ 1057248571Smm dsl_pool_t *dp; 1058248571Smm dsl_dataset_t *ds; 1059248571Smm int err; 1060260183Sdelphij boolean_t owned = B_FALSE; 1061248571Smm 1062260183Sdelphij if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) 1063249195Smm return (SET_ERROR(EINVAL)); 1064248571Smm 1065248571Smm err = dsl_pool_hold(tosnap, FTAG, &dp); 1066248571Smm if (err != 0) 1067248571Smm return (err); 1068248571Smm 1069260183Sdelphij if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { 1070260183Sdelphij /* 1071260183Sdelphij * We are sending a filesystem or volume. Ensure 1072260183Sdelphij * that it doesn't change by owning the dataset. 1073260183Sdelphij */ 1074260183Sdelphij err = dsl_dataset_own(dp, tosnap, FTAG, &ds); 1075260183Sdelphij owned = B_TRUE; 1076260183Sdelphij } else { 1077260183Sdelphij err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); 1078260183Sdelphij } 1079248571Smm if (err != 0) { 1080248571Smm dsl_pool_rele(dp, FTAG); 1081248571Smm return (err); 1082248571Smm } 1083248571Smm 1084248571Smm if (fromsnap != NULL) { 1085260183Sdelphij zfs_bookmark_phys_t zb; 1086260183Sdelphij boolean_t is_clone = B_FALSE; 1087260183Sdelphij int fsnamelen = strchr(tosnap, '@') - tosnap; 1088260183Sdelphij 1089260183Sdelphij /* 1090260183Sdelphij * If the fromsnap is in a different filesystem, then 1091260183Sdelphij * mark the send stream as a clone. 1092260183Sdelphij */ 1093260183Sdelphij if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || 1094260183Sdelphij (fromsnap[fsnamelen] != '@' && 1095260183Sdelphij fromsnap[fsnamelen] != '#')) { 1096260183Sdelphij is_clone = B_TRUE; 1097260183Sdelphij } 1098260183Sdelphij 1099260183Sdelphij if (strchr(fromsnap, '@')) { 1100260183Sdelphij dsl_dataset_t *fromds; 1101260183Sdelphij err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); 1102260183Sdelphij if (err == 0) { 1103260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 1104260183Sdelphij err = SET_ERROR(EXDEV); 1105260183Sdelphij zb.zbm_creation_time = 1106275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 1107260183Sdelphij zb.zbm_creation_txg = 1108275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_txg; 1109275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 1110260183Sdelphij is_clone = (ds->ds_dir != fromds->ds_dir); 1111260183Sdelphij dsl_dataset_rele(fromds, FTAG); 1112260183Sdelphij } 1113260183Sdelphij } else { 1114260183Sdelphij err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); 1115260183Sdelphij } 1116248571Smm if (err != 0) { 1117248571Smm dsl_dataset_rele(ds, FTAG); 1118248571Smm dsl_pool_rele(dp, FTAG); 1119248571Smm return (err); 1120248571Smm } 1121274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 1122321535Smav embedok, large_block_ok, compressok, 1123289362Smav outfd, resumeobj, resumeoff, fp, off); 1124260183Sdelphij } else { 1125274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 1126321535Smav embedok, large_block_ok, compressok, 1127289362Smav outfd, resumeobj, resumeoff, fp, off); 1128248571Smm } 1129260183Sdelphij if (owned) 1130260183Sdelphij dsl_dataset_disown(ds, FTAG); 1131260183Sdelphij else 1132260183Sdelphij dsl_dataset_rele(ds, FTAG); 1133260183Sdelphij return (err); 1134248571Smm} 1135248571Smm 1136286683Smavstatic int 1137321535Smavdmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t uncompressed, 1138321535Smav uint64_t compressed, boolean_t stream_compressed, uint64_t *sizep) 1139286683Smav{ 1140339110Smav int err = 0; 1141321535Smav uint64_t size; 1142286683Smav /* 1143286683Smav * Assume that space (both on-disk and in-stream) is dominated by 1144286683Smav * data. We will adjust for indirect blocks and the copies property, 1145286683Smav * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). 1146286683Smav */ 1147321535Smav uint64_t recordsize; 1148321535Smav uint64_t record_count; 1149321612Smav objset_t *os; 1150321612Smav VERIFY0(dmu_objset_from_ds(ds, &os)); 1151286683Smav 1152321535Smav /* Assume all (uncompressed) blocks are recordsize. */ 1153339110Smav if (zfs_override_estimate_recordsize != 0) { 1154339110Smav recordsize = zfs_override_estimate_recordsize; 1155339110Smav } else if (os->os_phys->os_type == DMU_OST_ZVOL) { 1156321612Smav err = dsl_prop_get_int_ds(ds, 1157321612Smav zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), &recordsize); 1158321612Smav } else { 1159321612Smav err = dsl_prop_get_int_ds(ds, 1160321612Smav zfs_prop_to_name(ZFS_PROP_RECORDSIZE), &recordsize); 1161321612Smav } 1162321535Smav if (err != 0) 1163321535Smav return (err); 1164321535Smav record_count = uncompressed / recordsize; 1165321535Smav 1166286683Smav /* 1167321535Smav * If we're estimating a send size for a compressed stream, use the 1168321535Smav * compressed data size to estimate the stream size. Otherwise, use the 1169321535Smav * uncompressed data size. 1170321535Smav */ 1171321535Smav size = stream_compressed ? compressed : uncompressed; 1172321535Smav 1173321535Smav /* 1174286683Smav * Subtract out approximate space used by indirect blocks. 1175286683Smav * Assume most space is used by data blocks (non-indirect, non-dnode). 1176321535Smav * Assume no ditto blocks or internal fragmentation. 1177286683Smav * 1178286683Smav * Therefore, space used by indirect blocks is sizeof(blkptr_t) per 1179321535Smav * block. 1180286683Smav */ 1181321535Smav size -= record_count * sizeof (blkptr_t); 1182286683Smav 1183286683Smav /* Add in the space for the record associated with each block. */ 1184321535Smav size += record_count * sizeof (dmu_replay_record_t); 1185286683Smav 1186286683Smav *sizep = size; 1187286683Smav 1188286683Smav return (0); 1189286683Smav} 1190286683Smav 1191248571Smmint 1192321535Smavdmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, 1193321535Smav boolean_t stream_compressed, uint64_t *sizep) 1194248571Smm{ 1195228103Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1196228103Smm int err; 1197321535Smav uint64_t uncomp, comp; 1198228103Smm 1199248571Smm ASSERT(dsl_pool_config_held(dp)); 1200248571Smm 1201228103Smm /* tosnap must be a snapshot */ 1202286575Smav if (!ds->ds_is_snapshot) 1203249195Smm return (SET_ERROR(EINVAL)); 1204228103Smm 1205284301Savg /* fromsnap, if provided, must be a snapshot */ 1206286575Smav if (fromds != NULL && !fromds->ds_is_snapshot) 1207284301Savg return (SET_ERROR(EINVAL)); 1208284301Savg 1209248571Smm /* 1210248571Smm * fromsnap must be an earlier snapshot from the same fs as tosnap, 1211248571Smm * or the origin's fs. 1212248571Smm */ 1213260183Sdelphij if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) 1214249195Smm return (SET_ERROR(EXDEV)); 1215228103Smm 1216321535Smav /* Get compressed and uncompressed size estimates of changed data. */ 1217228103Smm if (fromds == NULL) { 1218321535Smav uncomp = dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1219321535Smav comp = dsl_dataset_phys(ds)->ds_compressed_bytes; 1220228103Smm } else { 1221321535Smav uint64_t used; 1222228103Smm err = dsl_dataset_space_written(fromds, ds, 1223321535Smav &used, &comp, &uncomp); 1224248571Smm if (err != 0) 1225228103Smm return (err); 1226228103Smm } 1227228103Smm 1228321535Smav err = dmu_adjust_send_estimate_for_indirects(ds, uncomp, comp, 1229321535Smav stream_compressed, sizep); 1230321612Smav /* 1231321612Smav * Add the size of the BEGIN and END records to the estimate. 1232321612Smav */ 1233321612Smav *sizep += 2 * sizeof (dmu_replay_record_t); 1234286683Smav return (err); 1235286683Smav} 1236228103Smm 1237321535Smavstruct calculate_send_arg { 1238321535Smav uint64_t uncompressed; 1239321535Smav uint64_t compressed; 1240321535Smav}; 1241321535Smav 1242286683Smav/* 1243286683Smav * Simple callback used to traverse the blocks of a snapshot and sum their 1244321535Smav * uncompressed and compressed sizes. 1245286683Smav */ 1246286683Smav/* ARGSUSED */ 1247286683Smavstatic int 1248286683Smavdmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1249286683Smav const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1250286683Smav{ 1251321535Smav struct calculate_send_arg *space = arg; 1252286683Smav if (bp != NULL && !BP_IS_HOLE(bp)) { 1253321535Smav space->uncompressed += BP_GET_UCSIZE(bp); 1254321535Smav space->compressed += BP_GET_PSIZE(bp); 1255286683Smav } 1256286683Smav return (0); 1257286683Smav} 1258286683Smav 1259286683Smav/* 1260286683Smav * Given a desination snapshot and a TXG, calculate the approximate size of a 1261286683Smav * send stream sent from that TXG. from_txg may be zero, indicating that the 1262286683Smav * whole snapshot will be sent. 1263286683Smav */ 1264286683Smavint 1265286683Smavdmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, 1266321535Smav boolean_t stream_compressed, uint64_t *sizep) 1267286683Smav{ 1268286683Smav dsl_pool_t *dp = ds->ds_dir->dd_pool; 1269286683Smav int err; 1270321535Smav struct calculate_send_arg size = { 0 }; 1271286683Smav 1272286683Smav ASSERT(dsl_pool_config_held(dp)); 1273286683Smav 1274286683Smav /* tosnap must be a snapshot */ 1275321535Smav if (!ds->ds_is_snapshot) 1276286683Smav return (SET_ERROR(EINVAL)); 1277286683Smav 1278286683Smav /* verify that from_txg is before the provided snapshot was taken */ 1279286683Smav if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { 1280286683Smav return (SET_ERROR(EXDEV)); 1281286683Smav } 1282286683Smav 1283228103Smm /* 1284286683Smav * traverse the blocks of the snapshot with birth times after 1285286683Smav * from_txg, summing their uncompressed size 1286228103Smm */ 1287286683Smav err = traverse_dataset(ds, from_txg, TRAVERSE_POST, 1288286683Smav dmu_calculate_send_traversal, &size); 1289286683Smav if (err) 1290228103Smm return (err); 1291228103Smm 1292321535Smav err = dmu_adjust_send_estimate_for_indirects(ds, size.uncompressed, 1293321535Smav size.compressed, stream_compressed, sizep); 1294286683Smav return (err); 1295228103Smm} 1296228103Smm 1297248571Smmtypedef struct dmu_recv_begin_arg { 1298248571Smm const char *drba_origin; 1299248571Smm dmu_recv_cookie_t *drba_cookie; 1300248571Smm cred_t *drba_cred; 1301253820Sdelphij uint64_t drba_snapobj; 1302248571Smm} dmu_recv_begin_arg_t; 1303168404Spjd 1304168404Spjdstatic int 1305248571Smmrecv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, 1306248571Smm uint64_t fromguid) 1307168404Spjd{ 1308185029Spjd uint64_t val; 1309359722Sfreqlabs uint64_t children; 1310248571Smm int error; 1311248571Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1312185029Spjd 1313352376Savg /* Temporary clone name must not exist. */ 1314248571Smm error = zap_lookup(dp->dp_meta_objset, 1315275782Sdelphij dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, 1316248571Smm 8, 1, &val); 1317248571Smm if (error != ENOENT) 1318352376Savg return (error == 0 ? SET_ERROR(EBUSY) : error); 1319248571Smm 1320352376Savg /* Resume state must not be set. */ 1321352376Savg if (dsl_dataset_has_resume_receive_state(ds)) 1322352376Savg return (SET_ERROR(EBUSY)); 1323352376Savg 1324352376Savg /* New snapshot name must not exist. */ 1325248571Smm error = zap_lookup(dp->dp_meta_objset, 1326275782Sdelphij dsl_dataset_phys(ds)->ds_snapnames_zapobj, 1327275782Sdelphij drba->drba_cookie->drc_tosnap, 8, 1, &val); 1328248571Smm if (error != ENOENT) 1329352376Savg return (error == 0 ? SET_ERROR(EEXIST) : error); 1330168404Spjd 1331359722Sfreqlabs /* must not have children if receiving a ZVOL */ 1332359722Sfreqlabs error = zap_count(dp->dp_meta_objset, 1333359722Sfreqlabs dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, &children); 1334359722Sfreqlabs if (error != 0) 1335359722Sfreqlabs return (error); 1336359722Sfreqlabs if (drba->drba_cookie->drc_drrb->drr_type != DMU_OST_ZFS && 1337359722Sfreqlabs children > 0) 1338359722Sfreqlabs return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1339359722Sfreqlabs 1340264835Sdelphij /* 1341264835Sdelphij * Check snapshot limit before receiving. We'll recheck again at the 1342264835Sdelphij * end, but might as well abort before receiving if we're already over 1343264835Sdelphij * the limit. 1344264835Sdelphij * 1345264835Sdelphij * Note that we do not check the file system limit with 1346264835Sdelphij * dsl_dir_fscount_check because the temporary %clones don't count 1347264835Sdelphij * against that limit. 1348264835Sdelphij */ 1349264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, 1350264835Sdelphij NULL, drba->drba_cred); 1351264835Sdelphij if (error != 0) 1352264835Sdelphij return (error); 1353264835Sdelphij 1354248571Smm if (fromguid != 0) { 1355253820Sdelphij dsl_dataset_t *snap; 1356275782Sdelphij uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1357253820Sdelphij 1358253820Sdelphij /* Find snapshot in this dir that matches fromguid. */ 1359253820Sdelphij while (obj != 0) { 1360253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 1361253820Sdelphij &snap); 1362253820Sdelphij if (error != 0) 1363253820Sdelphij return (SET_ERROR(ENODEV)); 1364253820Sdelphij if (snap->ds_dir != ds->ds_dir) { 1365253820Sdelphij dsl_dataset_rele(snap, FTAG); 1366253820Sdelphij return (SET_ERROR(ENODEV)); 1367253820Sdelphij } 1368275782Sdelphij if (dsl_dataset_phys(snap)->ds_guid == fromguid) 1369253820Sdelphij break; 1370275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 1371253820Sdelphij dsl_dataset_rele(snap, FTAG); 1372253820Sdelphij } 1373253820Sdelphij if (obj == 0) 1374249195Smm return (SET_ERROR(ENODEV)); 1375168404Spjd 1376253820Sdelphij if (drba->drba_cookie->drc_force) { 1377253820Sdelphij drba->drba_snapobj = obj; 1378253820Sdelphij } else { 1379253820Sdelphij /* 1380253820Sdelphij * If we are not forcing, there must be no 1381253820Sdelphij * changes since fromsnap. 1382253820Sdelphij */ 1383253820Sdelphij if (dsl_dataset_modified_since_snap(ds, snap)) { 1384219089Spjd dsl_dataset_rele(snap, FTAG); 1385253820Sdelphij return (SET_ERROR(ETXTBSY)); 1386219089Spjd } 1387253820Sdelphij drba->drba_snapobj = ds->ds_prev->ds_object; 1388219089Spjd } 1389253820Sdelphij 1390253820Sdelphij dsl_dataset_rele(snap, FTAG); 1391219089Spjd } else { 1392283525Savg /* if full, then must be forced */ 1393283525Savg if (!drba->drba_cookie->drc_force) 1394283525Savg return (SET_ERROR(EEXIST)); 1395283525Savg /* start from $ORIGIN@$ORIGIN, if supported */ 1396283525Savg drba->drba_snapobj = dp->dp_origin_snap != NULL ? 1397283525Savg dp->dp_origin_snap->ds_object : 0; 1398219089Spjd } 1399219089Spjd 1400248571Smm return (0); 1401168404Spjd 1402168404Spjd} 1403168404Spjd 1404248571Smmstatic int 1405248571Smmdmu_recv_begin_check(void *arg, dmu_tx_t *tx) 1406248571Smm{ 1407248571Smm dmu_recv_begin_arg_t *drba = arg; 1408248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1409248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1410248571Smm uint64_t fromguid = drrb->drr_fromguid; 1411248571Smm int flags = drrb->drr_flags; 1412248571Smm int error; 1413268075Sdelphij uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1414248571Smm dsl_dataset_t *ds; 1415248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1416248571Smm 1417248571Smm /* already checked */ 1418248571Smm ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1419289362Smav ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING)); 1420248571Smm 1421248571Smm if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1422248571Smm DMU_COMPOUNDSTREAM || 1423248571Smm drrb->drr_type >= DMU_OST_NUMTYPES || 1424248571Smm ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) 1425249195Smm return (SET_ERROR(EINVAL)); 1426248571Smm 1427248571Smm /* Verify pool version supports SA if SA_SPILL feature set */ 1428268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1429268075Sdelphij spa_version(dp->dp_spa) < SPA_VERSION_SA) 1430249195Smm return (SET_ERROR(ENOTSUP)); 1431248571Smm 1432289362Smav if (drba->drba_cookie->drc_resumable && 1433289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET)) 1434289362Smav return (SET_ERROR(ENOTSUP)); 1435289362Smav 1436268075Sdelphij /* 1437268075Sdelphij * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1438321535Smav * record to a plain WRITE record, so the pool must have the 1439268075Sdelphij * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1440268075Sdelphij * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1441268075Sdelphij */ 1442268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1443268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1444268075Sdelphij return (SET_ERROR(ENOTSUP)); 1445321535Smav if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && 1446268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1447268075Sdelphij return (SET_ERROR(ENOTSUP)); 1448268075Sdelphij 1449274337Sdelphij /* 1450274337Sdelphij * The receiving code doesn't know how to translate large blocks 1451274337Sdelphij * to smaller ones, so the pool must have the LARGE_BLOCKS 1452274337Sdelphij * feature enabled if the stream has LARGE_BLOCKS. 1453274337Sdelphij */ 1454274337Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 1455274337Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) 1456274337Sdelphij return (SET_ERROR(ENOTSUP)); 1457274337Sdelphij 1458248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1459248571Smm if (error == 0) { 1460248571Smm /* target fs already exists; recv into temp clone */ 1461248571Smm 1462248571Smm /* Can't recv a clone into an existing fs */ 1463294815Smav if (flags & DRR_FLAG_CLONE || drba->drba_origin) { 1464248571Smm dsl_dataset_rele(ds, FTAG); 1465249195Smm return (SET_ERROR(EINVAL)); 1466248571Smm } 1467248571Smm 1468248571Smm error = recv_begin_check_existing_impl(drba, ds, fromguid); 1469248571Smm dsl_dataset_rele(ds, FTAG); 1470248571Smm } else if (error == ENOENT) { 1471248571Smm /* target fs does not exist; must be a full backup or clone */ 1472307108Smav char buf[ZFS_MAX_DATASET_NAME_LEN]; 1473359722Sfreqlabs objset_t *os; 1474248571Smm 1475248571Smm /* 1476248571Smm * If it's a non-clone incremental, we are missing the 1477248571Smm * target fs, so fail the recv. 1478248571Smm */ 1479286705Smav if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || 1480286705Smav drba->drba_origin)) 1481249195Smm return (SET_ERROR(ENOENT)); 1482248571Smm 1483294815Smav /* 1484294815Smav * If we're receiving a full send as a clone, and it doesn't 1485294815Smav * contain all the necessary free records and freeobject 1486294815Smav * records, reject it. 1487294815Smav */ 1488294815Smav if (fromguid == 0 && drba->drba_origin && 1489294815Smav !(flags & DRR_FLAG_FREERECORDS)) 1490294815Smav return (SET_ERROR(EINVAL)); 1491294815Smav 1492248571Smm /* Open the parent of tofs */ 1493307108Smav ASSERT3U(strlen(tofs), <, sizeof (buf)); 1494248571Smm (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); 1495248571Smm error = dsl_dataset_hold(dp, buf, FTAG, &ds); 1496248571Smm if (error != 0) 1497248571Smm return (error); 1498248571Smm 1499264835Sdelphij /* 1500264835Sdelphij * Check filesystem and snapshot limits before receiving. We'll 1501264835Sdelphij * recheck snapshot limits again at the end (we create the 1502264835Sdelphij * filesystems and increment those counts during begin_sync). 1503264835Sdelphij */ 1504264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1505264835Sdelphij ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); 1506264835Sdelphij if (error != 0) { 1507264835Sdelphij dsl_dataset_rele(ds, FTAG); 1508264835Sdelphij return (error); 1509264835Sdelphij } 1510264835Sdelphij 1511264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1512264835Sdelphij ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); 1513264835Sdelphij if (error != 0) { 1514264835Sdelphij dsl_dataset_rele(ds, FTAG); 1515264835Sdelphij return (error); 1516264835Sdelphij } 1517264835Sdelphij 1518359722Sfreqlabs /* can't recv below anything but filesystems (eg. no ZVOLs) */ 1519359722Sfreqlabs error = dmu_objset_from_ds(ds, &os); 1520359722Sfreqlabs if (error != 0) { 1521359722Sfreqlabs dsl_dataset_rele(ds, FTAG); 1522359722Sfreqlabs return (error); 1523359722Sfreqlabs } 1524359722Sfreqlabs if (dmu_objset_type(os) != DMU_OST_ZFS) { 1525359722Sfreqlabs dsl_dataset_rele(ds, FTAG); 1526359722Sfreqlabs return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); 1527359722Sfreqlabs } 1528359722Sfreqlabs 1529248571Smm if (drba->drba_origin != NULL) { 1530248571Smm dsl_dataset_t *origin; 1531248571Smm error = dsl_dataset_hold(dp, drba->drba_origin, 1532248571Smm FTAG, &origin); 1533248571Smm if (error != 0) { 1534248571Smm dsl_dataset_rele(ds, FTAG); 1535248571Smm return (error); 1536248571Smm } 1537286575Smav if (!origin->ds_is_snapshot) { 1538248571Smm dsl_dataset_rele(origin, FTAG); 1539248571Smm dsl_dataset_rele(ds, FTAG); 1540249195Smm return (SET_ERROR(EINVAL)); 1541248571Smm } 1542294815Smav if (dsl_dataset_phys(origin)->ds_guid != fromguid && 1543294815Smav fromguid != 0) { 1544248571Smm dsl_dataset_rele(origin, FTAG); 1545248571Smm dsl_dataset_rele(ds, FTAG); 1546249195Smm return (SET_ERROR(ENODEV)); 1547248571Smm } 1548248571Smm dsl_dataset_rele(origin, FTAG); 1549248571Smm } 1550359722Sfreqlabs 1551248571Smm dsl_dataset_rele(ds, FTAG); 1552248571Smm error = 0; 1553248571Smm } 1554248571Smm return (error); 1555248571Smm} 1556248571Smm 1557168404Spjdstatic void 1558248571Smmdmu_recv_begin_sync(void *arg, dmu_tx_t *tx) 1559168404Spjd{ 1560248571Smm dmu_recv_begin_arg_t *drba = arg; 1561248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1562289362Smav objset_t *mos = dp->dp_meta_objset; 1563248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1564248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1565248571Smm dsl_dataset_t *ds, *newds; 1566185029Spjd uint64_t dsobj; 1567248571Smm int error; 1568289362Smav uint64_t crflags = 0; 1569168404Spjd 1570289362Smav if (drrb->drr_flags & DRR_FLAG_CI_DATA) 1571289362Smav crflags |= DS_FLAG_CI_DATASET; 1572168404Spjd 1573248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1574248571Smm if (error == 0) { 1575248571Smm /* create temporary clone */ 1576253820Sdelphij dsl_dataset_t *snap = NULL; 1577253820Sdelphij if (drba->drba_snapobj != 0) { 1578253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, 1579253820Sdelphij drba->drba_snapobj, FTAG, &snap)); 1580253820Sdelphij } 1581248571Smm dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, 1582253820Sdelphij snap, crflags, drba->drba_cred, tx); 1583282632Savg if (drba->drba_snapobj != 0) 1584282632Savg dsl_dataset_rele(snap, FTAG); 1585248571Smm dsl_dataset_rele(ds, FTAG); 1586248571Smm } else { 1587248571Smm dsl_dir_t *dd; 1588248571Smm const char *tail; 1589248571Smm dsl_dataset_t *origin = NULL; 1590248571Smm 1591248571Smm VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); 1592248571Smm 1593248571Smm if (drba->drba_origin != NULL) { 1594248571Smm VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, 1595248571Smm FTAG, &origin)); 1596248571Smm } 1597248571Smm 1598248571Smm /* Create new dataset. */ 1599248571Smm dsobj = dsl_dataset_create_sync(dd, 1600248571Smm strrchr(tofs, '/') + 1, 1601248571Smm origin, crflags, drba->drba_cred, tx); 1602248571Smm if (origin != NULL) 1603248571Smm dsl_dataset_rele(origin, FTAG); 1604248571Smm dsl_dir_rele(dd, FTAG); 1605248571Smm drba->drba_cookie->drc_newfs = B_TRUE; 1606248571Smm } 1607248571Smm VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); 1608248571Smm 1609289362Smav if (drba->drba_cookie->drc_resumable) { 1610289362Smav dsl_dataset_zapify(newds, tx); 1611289362Smav if (drrb->drr_fromguid != 0) { 1612289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID, 1613289362Smav 8, 1, &drrb->drr_fromguid, tx)); 1614289362Smav } 1615289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID, 1616289362Smav 8, 1, &drrb->drr_toguid, tx)); 1617289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME, 1618289362Smav 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx)); 1619289362Smav uint64_t one = 1; 1620289362Smav uint64_t zero = 0; 1621289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT, 1622289362Smav 8, 1, &one, tx)); 1623289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET, 1624289362Smav 8, 1, &zero, tx)); 1625289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES, 1626289362Smav 8, 1, &zero, tx)); 1627289362Smav if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & 1628321535Smav DMU_BACKUP_FEATURE_LARGE_BLOCKS) { 1629321535Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_LARGEBLOCK, 1630321535Smav 8, 1, &one, tx)); 1631321535Smav } 1632321535Smav if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & 1633289362Smav DMU_BACKUP_FEATURE_EMBED_DATA) { 1634289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, 1635289362Smav 8, 1, &one, tx)); 1636289362Smav } 1637321535Smav if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & 1638321535Smav DMU_BACKUP_FEATURE_COMPRESSED) { 1639321535Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_COMPRESSOK, 1640321535Smav 8, 1, &one, tx)); 1641321535Smav } 1642289362Smav } 1643289362Smav 1644248571Smm dmu_buf_will_dirty(newds->ds_dbuf, tx); 1645275782Sdelphij dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; 1646248571Smm 1647219089Spjd /* 1648219089Spjd * If we actually created a non-clone, we need to create the 1649219089Spjd * objset in our new dataset. 1650219089Spjd */ 1651308082Smav rrw_enter(&newds->ds_bp_rwlock, RW_READER, FTAG); 1652248571Smm if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { 1653219089Spjd (void) dmu_objset_create_impl(dp->dp_spa, 1654248571Smm newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); 1655219089Spjd } 1656308082Smav rrw_exit(&newds->ds_bp_rwlock, FTAG); 1657168404Spjd 1658248571Smm drba->drba_cookie->drc_ds = newds; 1659185029Spjd 1660248571Smm spa_history_log_internal_ds(newds, "receive", tx, ""); 1661168404Spjd} 1662168404Spjd 1663289362Smavstatic int 1664289362Smavdmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx) 1665289362Smav{ 1666289362Smav dmu_recv_begin_arg_t *drba = arg; 1667289362Smav dsl_pool_t *dp = dmu_tx_pool(tx); 1668289362Smav struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1669289362Smav int error; 1670289362Smav uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1671289362Smav dsl_dataset_t *ds; 1672289362Smav const char *tofs = drba->drba_cookie->drc_tofs; 1673289362Smav 1674289362Smav /* already checked */ 1675289362Smav ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1676289362Smav ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING); 1677289362Smav 1678289362Smav if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1679289362Smav DMU_COMPOUNDSTREAM || 1680289362Smav drrb->drr_type >= DMU_OST_NUMTYPES) 1681289362Smav return (SET_ERROR(EINVAL)); 1682289362Smav 1683289362Smav /* Verify pool version supports SA if SA_SPILL feature set */ 1684289362Smav if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1685289362Smav spa_version(dp->dp_spa) < SPA_VERSION_SA) 1686289362Smav return (SET_ERROR(ENOTSUP)); 1687289362Smav 1688289362Smav /* 1689289362Smav * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1690289362Smav * record to a plain WRITE record, so the pool must have the 1691289362Smav * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1692289362Smav * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1693289362Smav */ 1694289362Smav if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1695289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1696289362Smav return (SET_ERROR(ENOTSUP)); 1697321535Smav if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && 1698289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1699289362Smav return (SET_ERROR(ENOTSUP)); 1700289362Smav 1701307108Smav /* 6 extra bytes for /%recv */ 1702307108Smav char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 1703289362Smav 1704289362Smav (void) snprintf(recvname, sizeof (recvname), "%s/%s", 1705289362Smav tofs, recv_clone_name); 1706289362Smav 1707289362Smav if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { 1708289362Smav /* %recv does not exist; continue in tofs */ 1709289362Smav error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1710289362Smav if (error != 0) 1711289362Smav return (error); 1712289362Smav } 1713289362Smav 1714289362Smav /* check that ds is marked inconsistent */ 1715289362Smav if (!DS_IS_INCONSISTENT(ds)) { 1716289362Smav dsl_dataset_rele(ds, FTAG); 1717289362Smav return (SET_ERROR(EINVAL)); 1718289362Smav } 1719289362Smav 1720289362Smav /* check that there is resuming data, and that the toguid matches */ 1721289362Smav if (!dsl_dataset_is_zapified(ds)) { 1722289362Smav dsl_dataset_rele(ds, FTAG); 1723289362Smav return (SET_ERROR(EINVAL)); 1724289362Smav } 1725289362Smav uint64_t val; 1726289362Smav error = zap_lookup(dp->dp_meta_objset, ds->ds_object, 1727289362Smav DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val); 1728289362Smav if (error != 0 || drrb->drr_toguid != val) { 1729289362Smav dsl_dataset_rele(ds, FTAG); 1730289362Smav return (SET_ERROR(EINVAL)); 1731289362Smav } 1732289362Smav 1733289362Smav /* 1734289362Smav * Check if the receive is still running. If so, it will be owned. 1735289362Smav * Note that nothing else can own the dataset (e.g. after the receive 1736289362Smav * fails) because it will be marked inconsistent. 1737289362Smav */ 1738289362Smav if (dsl_dataset_has_owner(ds)) { 1739289362Smav dsl_dataset_rele(ds, FTAG); 1740289362Smav return (SET_ERROR(EBUSY)); 1741289362Smav } 1742289362Smav 1743289362Smav /* There should not be any snapshots of this fs yet. */ 1744289362Smav if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) { 1745289362Smav dsl_dataset_rele(ds, FTAG); 1746289362Smav return (SET_ERROR(EINVAL)); 1747289362Smav } 1748289362Smav 1749289362Smav /* 1750289362Smav * Note: resume point will be checked when we process the first WRITE 1751289362Smav * record. 1752289362Smav */ 1753289362Smav 1754289362Smav /* check that the origin matches */ 1755289362Smav val = 0; 1756289362Smav (void) zap_lookup(dp->dp_meta_objset, ds->ds_object, 1757289362Smav DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val); 1758289362Smav if (drrb->drr_fromguid != val) { 1759289362Smav dsl_dataset_rele(ds, FTAG); 1760289362Smav return (SET_ERROR(EINVAL)); 1761289362Smav } 1762289362Smav 1763289362Smav dsl_dataset_rele(ds, FTAG); 1764289362Smav return (0); 1765289362Smav} 1766289362Smav 1767289362Smavstatic void 1768289362Smavdmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx) 1769289362Smav{ 1770289362Smav dmu_recv_begin_arg_t *drba = arg; 1771289362Smav dsl_pool_t *dp = dmu_tx_pool(tx); 1772289362Smav const char *tofs = drba->drba_cookie->drc_tofs; 1773289362Smav dsl_dataset_t *ds; 1774289362Smav uint64_t dsobj; 1775307108Smav /* 6 extra bytes for /%recv */ 1776307108Smav char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 1777289362Smav 1778289362Smav (void) snprintf(recvname, sizeof (recvname), "%s/%s", 1779289362Smav tofs, recv_clone_name); 1780289362Smav 1781289362Smav if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { 1782289362Smav /* %recv does not exist; continue in tofs */ 1783289362Smav VERIFY0(dsl_dataset_hold(dp, tofs, FTAG, &ds)); 1784289362Smav drba->drba_cookie->drc_newfs = B_TRUE; 1785289362Smav } 1786289362Smav 1787289362Smav /* clear the inconsistent flag so that we can own it */ 1788289362Smav ASSERT(DS_IS_INCONSISTENT(ds)); 1789289362Smav dmu_buf_will_dirty(ds->ds_dbuf, tx); 1790289362Smav dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 1791289362Smav dsobj = ds->ds_object; 1792289362Smav dsl_dataset_rele(ds, FTAG); 1793289362Smav 1794289362Smav VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &ds)); 1795289362Smav 1796289362Smav dmu_buf_will_dirty(ds->ds_dbuf, tx); 1797289362Smav dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; 1798289362Smav 1799308082Smav rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1800289362Smav ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds))); 1801308082Smav rrw_exit(&ds->ds_bp_rwlock, FTAG); 1802289362Smav 1803289362Smav drba->drba_cookie->drc_ds = ds; 1804289362Smav 1805289362Smav spa_history_log_internal_ds(ds, "resume receive", tx, ""); 1806289362Smav} 1807289362Smav 1808185029Spjd/* 1809185029Spjd * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() 1810185029Spjd * succeeds; otherwise we will leak the holds on the datasets. 1811185029Spjd */ 1812185029Spjdint 1813289362Smavdmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, 1814289362Smav boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc) 1815168404Spjd{ 1816248571Smm dmu_recv_begin_arg_t drba = { 0 }; 1817168404Spjd 1818185029Spjd bzero(drc, sizeof (dmu_recv_cookie_t)); 1819289362Smav drc->drc_drr_begin = drr_begin; 1820289362Smav drc->drc_drrb = &drr_begin->drr_u.drr_begin; 1821185029Spjd drc->drc_tosnap = tosnap; 1822248571Smm drc->drc_tofs = tofs; 1823185029Spjd drc->drc_force = force; 1824289362Smav drc->drc_resumable = resumable; 1825264835Sdelphij drc->drc_cred = CRED(); 1826339126Smav drc->drc_clone = (origin != NULL); 1827168404Spjd 1828289362Smav if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { 1829248571Smm drc->drc_byteswap = B_TRUE; 1830321610Smav (void) fletcher_4_incremental_byteswap(drr_begin, 1831248571Smm sizeof (dmu_replay_record_t), &drc->drc_cksum); 1832289362Smav byteswap_record(drr_begin); 1833289362Smav } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { 1834321610Smav (void) fletcher_4_incremental_native(drr_begin, 1835289362Smav sizeof (dmu_replay_record_t), &drc->drc_cksum); 1836248571Smm } else { 1837289362Smav return (SET_ERROR(EINVAL)); 1838248571Smm } 1839219089Spjd 1840248571Smm drba.drba_origin = origin; 1841248571Smm drba.drba_cookie = drc; 1842248571Smm drba.drba_cred = CRED(); 1843219089Spjd 1844289362Smav if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & 1845289362Smav DMU_BACKUP_FEATURE_RESUMING) { 1846289362Smav return (dsl_sync_task(tofs, 1847289362Smav dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync, 1848289362Smav &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1849289362Smav } else { 1850289362Smav return (dsl_sync_task(tofs, 1851289362Smav dmu_recv_begin_check, dmu_recv_begin_sync, 1852289362Smav &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1853289362Smav } 1854168404Spjd} 1855168404Spjd 1856286705Smavstruct receive_record_arg { 1857286705Smav dmu_replay_record_t header; 1858286705Smav void *payload; /* Pointer to a buffer containing the payload */ 1859286705Smav /* 1860286705Smav * If the record is a write, pointer to the arc_buf_t containing the 1861286705Smav * payload. 1862286705Smav */ 1863286705Smav arc_buf_t *write_buf; 1864286705Smav int payload_size; 1865289362Smav uint64_t bytes_read; /* bytes read from stream when record created */ 1866286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 1867286705Smav bqueue_node_t node; 1868286705Smav}; 1869286705Smav 1870286705Smavstruct receive_writer_arg { 1871286587Smav objset_t *os; 1872286705Smav boolean_t byteswap; 1873286705Smav bqueue_t q; 1874289362Smav 1875286705Smav /* 1876286705Smav * These three args are used to signal to the main thread that we're 1877286705Smav * done. 1878286705Smav */ 1879286705Smav kmutex_t mutex; 1880286705Smav kcondvar_t cv; 1881286705Smav boolean_t done; 1882289362Smav 1883185029Spjd int err; 1884286705Smav /* A map from guid to dataset to help handle dedup'd streams. */ 1885286705Smav avl_tree_t *guid_to_ds_map; 1886289362Smav boolean_t resumable; 1887339126Smav uint64_t last_object; 1888339126Smav uint64_t last_offset; 1889339126Smav uint64_t max_object; /* highest object ID referenced in stream */ 1890289362Smav uint64_t bytes_read; /* bytes read when current record created */ 1891286705Smav}; 1892286705Smav 1893294815Smavstruct objlist { 1894294815Smav list_t list; /* List of struct receive_objnode. */ 1895294815Smav /* 1896294815Smav * Last object looked up. Used to assert that objects are being looked 1897294815Smav * up in ascending order. 1898294815Smav */ 1899294815Smav uint64_t last_lookup; 1900294815Smav}; 1901294815Smav 1902294815Smavstruct receive_objnode { 1903294815Smav list_node_t node; 1904294815Smav uint64_t object; 1905294815Smav}; 1906294815Smav 1907321535Smavstruct receive_arg { 1908286705Smav objset_t *os; 1909185029Spjd kthread_t *td; 1910185029Spjd struct file *fp; 1911286705Smav uint64_t voff; /* The current offset in the stream */ 1912289362Smav uint64_t bytes_read; 1913286705Smav /* 1914286705Smav * A record that has had its payload read in, but hasn't yet been handed 1915286705Smav * off to the worker thread. 1916286705Smav */ 1917286705Smav struct receive_record_arg *rrd; 1918286705Smav /* A record that has had its header read in, but not its payload. */ 1919286705Smav struct receive_record_arg *next_rrd; 1920185029Spjd zio_cksum_t cksum; 1921286587Smav zio_cksum_t prev_cksum; 1922286705Smav int err; 1923286705Smav boolean_t byteswap; 1924286705Smav /* Sorted list of objects not to issue prefetches for. */ 1925294815Smav struct objlist ignore_objlist; 1926286705Smav}; 1927286587Smav 1928219089Spjdtypedef struct guid_map_entry { 1929219089Spjd uint64_t guid; 1930219089Spjd dsl_dataset_t *gme_ds; 1931219089Spjd avl_node_t avlnode; 1932219089Spjd} guid_map_entry_t; 1933219089Spjd 1934168404Spjdstatic int 1935219089Spjdguid_compare(const void *arg1, const void *arg2) 1936168404Spjd{ 1937339158Smav const guid_map_entry_t *gmep1 = (const guid_map_entry_t *)arg1; 1938339158Smav const guid_map_entry_t *gmep2 = (const guid_map_entry_t *)arg2; 1939219089Spjd 1940339158Smav return (AVL_CMP(gmep1->guid, gmep2->guid)); 1941219089Spjd} 1942219089Spjd 1943219089Spjdstatic void 1944219089Spjdfree_guid_map_onexit(void *arg) 1945219089Spjd{ 1946219089Spjd avl_tree_t *ca = arg; 1947219089Spjd void *cookie = NULL; 1948219089Spjd guid_map_entry_t *gmep; 1949219089Spjd 1950219089Spjd while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { 1951248571Smm dsl_dataset_long_rele(gmep->gme_ds, gmep); 1952249196Smm dsl_dataset_rele(gmep->gme_ds, gmep); 1953219089Spjd kmem_free(gmep, sizeof (guid_map_entry_t)); 1954219089Spjd } 1955219089Spjd avl_destroy(ca); 1956219089Spjd kmem_free(ca, sizeof (avl_tree_t)); 1957219089Spjd} 1958219089Spjd 1959219089Spjdstatic int 1960286705Smavrestore_bytes(struct receive_arg *ra, void *buf, int len, off_t off, ssize_t *resid) 1961219089Spjd{ 1962168404Spjd struct uio auio; 1963168404Spjd struct iovec aiov; 1964168404Spjd int error; 1965168404Spjd 1966168404Spjd aiov.iov_base = buf; 1967168404Spjd aiov.iov_len = len; 1968168404Spjd auio.uio_iov = &aiov; 1969168404Spjd auio.uio_iovcnt = 1; 1970168404Spjd auio.uio_resid = len; 1971169170Spjd auio.uio_segflg = UIO_SYSSPACE; 1972168404Spjd auio.uio_rw = UIO_READ; 1973168404Spjd auio.uio_offset = off; 1974168404Spjd auio.uio_td = ra->td; 1975168404Spjd#ifdef _KERNEL 1976168404Spjd error = fo_read(ra->fp, &auio, ra->td->td_ucred, FOF_OFFSET, ra->td); 1977168404Spjd#else 1978168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 1979168404Spjd error = EOPNOTSUPP; 1980168404Spjd#endif 1981168404Spjd *resid = auio.uio_resid; 1982168404Spjd return (error); 1983168404Spjd} 1984168404Spjd 1985286587Smavstatic int 1986286705Smavreceive_read(struct receive_arg *ra, int len, void *buf) 1987168404Spjd{ 1988185029Spjd int done = 0; 1989168404Spjd 1990297509Smav /* 1991297509Smav * The code doesn't rely on this (lengths being multiples of 8). See 1992297509Smav * comment in dump_bytes. 1993297509Smav */ 1994240415Smm ASSERT0(len % 8); 1995168404Spjd 1996185029Spjd while (done < len) { 1997219089Spjd ssize_t resid; 1998168404Spjd 1999272601Sdelphij ra->err = restore_bytes(ra, buf + done, 2000185029Spjd len - done, ra->voff, &resid); 2001168404Spjd 2002289362Smav if (resid == len - done) { 2003289362Smav /* 2004289362Smav * Note: ECKSUM indicates that the receive 2005289362Smav * was interrupted and can potentially be resumed. 2006289362Smav */ 2007289362Smav ra->err = SET_ERROR(ECKSUM); 2008289362Smav } 2009185029Spjd ra->voff += len - done - resid; 2010185029Spjd done = len - resid; 2011248571Smm if (ra->err != 0) 2012286587Smav return (ra->err); 2013168404Spjd } 2014168404Spjd 2015289362Smav ra->bytes_read += len; 2016289362Smav 2017185029Spjd ASSERT3U(done, ==, len); 2018286587Smav return (0); 2019168404Spjd} 2020168404Spjd 2021168404Spjdstatic void 2022286587Smavbyteswap_record(dmu_replay_record_t *drr) 2023168404Spjd{ 2024168404Spjd#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) 2025168404Spjd#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) 2026168404Spjd drr->drr_type = BSWAP_32(drr->drr_type); 2027185029Spjd drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); 2028286587Smav 2029168404Spjd switch (drr->drr_type) { 2030168404Spjd case DRR_BEGIN: 2031168404Spjd DO64(drr_begin.drr_magic); 2032219089Spjd DO64(drr_begin.drr_versioninfo); 2033168404Spjd DO64(drr_begin.drr_creation_time); 2034168404Spjd DO32(drr_begin.drr_type); 2035185029Spjd DO32(drr_begin.drr_flags); 2036168404Spjd DO64(drr_begin.drr_toguid); 2037168404Spjd DO64(drr_begin.drr_fromguid); 2038168404Spjd break; 2039168404Spjd case DRR_OBJECT: 2040168404Spjd DO64(drr_object.drr_object); 2041168404Spjd DO32(drr_object.drr_type); 2042168404Spjd DO32(drr_object.drr_bonustype); 2043168404Spjd DO32(drr_object.drr_blksz); 2044168404Spjd DO32(drr_object.drr_bonuslen); 2045219089Spjd DO64(drr_object.drr_toguid); 2046168404Spjd break; 2047168404Spjd case DRR_FREEOBJECTS: 2048168404Spjd DO64(drr_freeobjects.drr_firstobj); 2049168404Spjd DO64(drr_freeobjects.drr_numobjs); 2050219089Spjd DO64(drr_freeobjects.drr_toguid); 2051168404Spjd break; 2052168404Spjd case DRR_WRITE: 2053168404Spjd DO64(drr_write.drr_object); 2054168404Spjd DO32(drr_write.drr_type); 2055168404Spjd DO64(drr_write.drr_offset); 2056321535Smav DO64(drr_write.drr_logical_size); 2057219089Spjd DO64(drr_write.drr_toguid); 2058286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); 2059219089Spjd DO64(drr_write.drr_key.ddk_prop); 2060321535Smav DO64(drr_write.drr_compressed_size); 2061168404Spjd break; 2062219089Spjd case DRR_WRITE_BYREF: 2063219089Spjd DO64(drr_write_byref.drr_object); 2064219089Spjd DO64(drr_write_byref.drr_offset); 2065219089Spjd DO64(drr_write_byref.drr_length); 2066219089Spjd DO64(drr_write_byref.drr_toguid); 2067219089Spjd DO64(drr_write_byref.drr_refguid); 2068219089Spjd DO64(drr_write_byref.drr_refobject); 2069219089Spjd DO64(drr_write_byref.drr_refoffset); 2070286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. 2071286587Smav drr_key.ddk_cksum); 2072219089Spjd DO64(drr_write_byref.drr_key.ddk_prop); 2073219089Spjd break; 2074268075Sdelphij case DRR_WRITE_EMBEDDED: 2075268075Sdelphij DO64(drr_write_embedded.drr_object); 2076268075Sdelphij DO64(drr_write_embedded.drr_offset); 2077268075Sdelphij DO64(drr_write_embedded.drr_length); 2078268075Sdelphij DO64(drr_write_embedded.drr_toguid); 2079268075Sdelphij DO32(drr_write_embedded.drr_lsize); 2080268075Sdelphij DO32(drr_write_embedded.drr_psize); 2081268075Sdelphij break; 2082168404Spjd case DRR_FREE: 2083168404Spjd DO64(drr_free.drr_object); 2084168404Spjd DO64(drr_free.drr_offset); 2085168404Spjd DO64(drr_free.drr_length); 2086219089Spjd DO64(drr_free.drr_toguid); 2087168404Spjd break; 2088219089Spjd case DRR_SPILL: 2089219089Spjd DO64(drr_spill.drr_object); 2090219089Spjd DO64(drr_spill.drr_length); 2091219089Spjd DO64(drr_spill.drr_toguid); 2092219089Spjd break; 2093168404Spjd case DRR_END: 2094219089Spjd DO64(drr_end.drr_toguid); 2095286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); 2096168404Spjd break; 2097168404Spjd } 2098286587Smav 2099286587Smav if (drr->drr_type != DRR_BEGIN) { 2100286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); 2101286587Smav } 2102286587Smav 2103168404Spjd#undef DO64 2104168404Spjd#undef DO32 2105168404Spjd} 2106168404Spjd 2107272810Sdelphijstatic inline uint8_t 2108272810Sdelphijdeduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) 2109272810Sdelphij{ 2110272810Sdelphij if (bonus_type == DMU_OT_SA) { 2111272810Sdelphij return (1); 2112272810Sdelphij } else { 2113272810Sdelphij return (1 + 2114272810Sdelphij ((DN_MAX_BONUSLEN - bonus_size) >> SPA_BLKPTRSHIFT)); 2115272810Sdelphij } 2116272810Sdelphij} 2117272810Sdelphij 2118289362Smavstatic void 2119289362Smavsave_resume_state(struct receive_writer_arg *rwa, 2120289362Smav uint64_t object, uint64_t offset, dmu_tx_t *tx) 2121289362Smav{ 2122289362Smav int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; 2123289362Smav 2124289362Smav if (!rwa->resumable) 2125289362Smav return; 2126289362Smav 2127289362Smav /* 2128289362Smav * We use ds_resume_bytes[] != 0 to indicate that we need to 2129289362Smav * update this on disk, so it must not be 0. 2130289362Smav */ 2131289362Smav ASSERT(rwa->bytes_read != 0); 2132289362Smav 2133289362Smav /* 2134289362Smav * We only resume from write records, which have a valid 2135289362Smav * (non-meta-dnode) object number. 2136289362Smav */ 2137289362Smav ASSERT(object != 0); 2138289362Smav 2139289362Smav /* 2140289362Smav * For resuming to work correctly, we must receive records in order, 2141289362Smav * sorted by object,offset. This is checked by the callers, but 2142289362Smav * assert it here for good measure. 2143289362Smav */ 2144289362Smav ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]); 2145289362Smav ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] || 2146289362Smav offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]); 2147289362Smav ASSERT3U(rwa->bytes_read, >=, 2148289362Smav rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]); 2149289362Smav 2150289362Smav rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object; 2151289362Smav rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset; 2152289362Smav rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read; 2153289362Smav} 2154289362Smav 2155168404Spjdstatic int 2156286705Smavreceive_object(struct receive_writer_arg *rwa, struct drr_object *drro, 2157286705Smav void *data) 2158168404Spjd{ 2159272810Sdelphij dmu_object_info_t doi; 2160168404Spjd dmu_tx_t *tx; 2161272810Sdelphij uint64_t object; 2162272810Sdelphij int err; 2163168404Spjd 2164168404Spjd if (drro->drr_type == DMU_OT_NONE || 2165236884Smm !DMU_OT_IS_VALID(drro->drr_type) || 2166236884Smm !DMU_OT_IS_VALID(drro->drr_bonustype) || 2167219089Spjd drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || 2168168404Spjd drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || 2169168404Spjd P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || 2170168404Spjd drro->drr_blksz < SPA_MINBLOCKSIZE || 2171286705Smav drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || 2172168404Spjd drro->drr_bonuslen > DN_MAX_BONUSLEN) { 2173249195Smm return (SET_ERROR(EINVAL)); 2174168404Spjd } 2175168404Spjd 2176286705Smav err = dmu_object_info(rwa->os, drro->drr_object, &doi); 2177168404Spjd 2178200726Sdelphij if (err != 0 && err != ENOENT) 2179249195Smm return (SET_ERROR(EINVAL)); 2180272810Sdelphij object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; 2181200726Sdelphij 2182339126Smav if (drro->drr_object > rwa->max_object) 2183339126Smav rwa->max_object = drro->drr_object; 2184339126Smav 2185272810Sdelphij /* 2186272810Sdelphij * If we are losing blkptrs or changing the block size this must 2187272810Sdelphij * be a new file instance. We must clear out the previous file 2188272810Sdelphij * contents before we can change this type of metadata in the dnode. 2189272810Sdelphij */ 2190272810Sdelphij if (err == 0) { 2191272810Sdelphij int nblkptr; 2192272810Sdelphij 2193272810Sdelphij nblkptr = deduce_nblkptr(drro->drr_bonustype, 2194272810Sdelphij drro->drr_bonuslen); 2195272810Sdelphij 2196272810Sdelphij if (drro->drr_blksz != doi.doi_data_block_size || 2197272810Sdelphij nblkptr < doi.doi_nblkptr) { 2198286705Smav err = dmu_free_long_range(rwa->os, drro->drr_object, 2199272810Sdelphij 0, DMU_OBJECT_END); 2200272810Sdelphij if (err != 0) 2201272810Sdelphij return (SET_ERROR(EINVAL)); 2202272810Sdelphij } 2203272810Sdelphij } 2204272810Sdelphij 2205286705Smav tx = dmu_tx_create(rwa->os); 2206272810Sdelphij dmu_tx_hold_bonus(tx, object); 2207272810Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 2208272810Sdelphij if (err != 0) { 2209272810Sdelphij dmu_tx_abort(tx); 2210272810Sdelphij return (err); 2211272810Sdelphij } 2212272810Sdelphij 2213272810Sdelphij if (object == DMU_NEW_OBJECT) { 2214168404Spjd /* currently free, want to be allocated */ 2215286705Smav err = dmu_object_claim(rwa->os, drro->drr_object, 2216168404Spjd drro->drr_type, drro->drr_blksz, 2217168404Spjd drro->drr_bonustype, drro->drr_bonuslen, tx); 2218272810Sdelphij } else if (drro->drr_type != doi.doi_type || 2219272810Sdelphij drro->drr_blksz != doi.doi_data_block_size || 2220272810Sdelphij drro->drr_bonustype != doi.doi_bonus_type || 2221272810Sdelphij drro->drr_bonuslen != doi.doi_bonus_size) { 2222272810Sdelphij /* currently allocated, but with different properties */ 2223286705Smav err = dmu_object_reclaim(rwa->os, drro->drr_object, 2224168404Spjd drro->drr_type, drro->drr_blksz, 2225272810Sdelphij drro->drr_bonustype, drro->drr_bonuslen, tx); 2226168404Spjd } 2227248571Smm if (err != 0) { 2228272810Sdelphij dmu_tx_commit(tx); 2229249195Smm return (SET_ERROR(EINVAL)); 2230219089Spjd } 2231200726Sdelphij 2232286705Smav dmu_object_set_checksum(rwa->os, drro->drr_object, 2233286587Smav drro->drr_checksumtype, tx); 2234286705Smav dmu_object_set_compress(rwa->os, drro->drr_object, 2235286587Smav drro->drr_compress, tx); 2236168404Spjd 2237200727Sdelphij if (data != NULL) { 2238168404Spjd dmu_buf_t *db; 2239200727Sdelphij 2240286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db)); 2241168404Spjd dmu_buf_will_dirty(db, tx); 2242168404Spjd 2243185029Spjd ASSERT3U(db->db_size, >=, drro->drr_bonuslen); 2244185029Spjd bcopy(data, db->db_data, drro->drr_bonuslen); 2245286705Smav if (rwa->byteswap) { 2246236884Smm dmu_object_byteswap_t byteswap = 2247236884Smm DMU_OT_BYTESWAP(drro->drr_bonustype); 2248236884Smm dmu_ot_byteswap[byteswap].ob_func(db->db_data, 2249168404Spjd drro->drr_bonuslen); 2250168404Spjd } 2251168404Spjd dmu_buf_rele(db, FTAG); 2252168404Spjd } 2253168404Spjd dmu_tx_commit(tx); 2254289362Smav 2255168404Spjd return (0); 2256168404Spjd} 2257168404Spjd 2258168404Spjd/* ARGSUSED */ 2259168404Spjdstatic int 2260286705Smavreceive_freeobjects(struct receive_writer_arg *rwa, 2261168404Spjd struct drr_freeobjects *drrfo) 2262168404Spjd{ 2263168404Spjd uint64_t obj; 2264294815Smav int next_err = 0; 2265168404Spjd 2266168404Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) 2267249195Smm return (SET_ERROR(EINVAL)); 2268168404Spjd 2269168404Spjd for (obj = drrfo->drr_firstobj; 2270294815Smav obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0; 2271294815Smav next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) { 2272168404Spjd int err; 2273168404Spjd 2274286705Smav if (dmu_object_info(rwa->os, obj, NULL) != 0) 2275168404Spjd continue; 2276168404Spjd 2277286705Smav err = dmu_free_long_object(rwa->os, obj); 2278248571Smm if (err != 0) 2279168404Spjd return (err); 2280339126Smav 2281339126Smav if (obj > rwa->max_object) 2282339126Smav rwa->max_object = obj; 2283168404Spjd } 2284294815Smav if (next_err != ESRCH) 2285294815Smav return (next_err); 2286168404Spjd return (0); 2287168404Spjd} 2288168404Spjd 2289168404Spjdstatic int 2290286705Smavreceive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, 2291286705Smav arc_buf_t *abuf) 2292168404Spjd{ 2293168404Spjd dmu_tx_t *tx; 2294168404Spjd int err; 2295168404Spjd 2296321535Smav if (drrw->drr_offset + drrw->drr_logical_size < drrw->drr_offset || 2297236884Smm !DMU_OT_IS_VALID(drrw->drr_type)) 2298249195Smm return (SET_ERROR(EINVAL)); 2299168404Spjd 2300289362Smav /* 2301289362Smav * For resuming to work, records must be in increasing order 2302289362Smav * by (object, offset). 2303289362Smav */ 2304289362Smav if (drrw->drr_object < rwa->last_object || 2305289362Smav (drrw->drr_object == rwa->last_object && 2306289362Smav drrw->drr_offset < rwa->last_offset)) { 2307289362Smav return (SET_ERROR(EINVAL)); 2308289362Smav } 2309289362Smav rwa->last_object = drrw->drr_object; 2310289362Smav rwa->last_offset = drrw->drr_offset; 2311289362Smav 2312339126Smav if (rwa->last_object > rwa->max_object) 2313339126Smav rwa->max_object = rwa->last_object; 2314339126Smav 2315286705Smav if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) 2316249195Smm return (SET_ERROR(EINVAL)); 2317168404Spjd 2318286705Smav tx = dmu_tx_create(rwa->os); 2319272601Sdelphij 2320168404Spjd dmu_tx_hold_write(tx, drrw->drr_object, 2321321535Smav drrw->drr_offset, drrw->drr_logical_size); 2322168404Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2323248571Smm if (err != 0) { 2324168404Spjd dmu_tx_abort(tx); 2325168404Spjd return (err); 2326168404Spjd } 2327286705Smav if (rwa->byteswap) { 2328236884Smm dmu_object_byteswap_t byteswap = 2329236884Smm DMU_OT_BYTESWAP(drrw->drr_type); 2330286587Smav dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, 2331321535Smav DRR_WRITE_PAYLOAD_SIZE(drrw)); 2332236884Smm } 2333286587Smav 2334321535Smav /* use the bonus buf to look up the dnode in dmu_assign_arcbuf */ 2335286587Smav dmu_buf_t *bonus; 2336286705Smav if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) 2337286587Smav return (SET_ERROR(EINVAL)); 2338272601Sdelphij dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); 2339289362Smav 2340289362Smav /* 2341289362Smav * Note: If the receive fails, we want the resume stream to start 2342289362Smav * with the same record that we last successfully received (as opposed 2343289362Smav * to the next record), so that we can verify that we are 2344289362Smav * resuming from the correct location. 2345289362Smav */ 2346289362Smav save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx); 2347168404Spjd dmu_tx_commit(tx); 2348272601Sdelphij dmu_buf_rele(bonus, FTAG); 2349289362Smav 2350168404Spjd return (0); 2351168404Spjd} 2352168404Spjd 2353219089Spjd/* 2354219089Spjd * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed 2355219089Spjd * streams to refer to a copy of the data that is already on the 2356219089Spjd * system because it came in earlier in the stream. This function 2357219089Spjd * finds the earlier copy of the data, and uses that copy instead of 2358219089Spjd * data from the stream to fulfill this write. 2359219089Spjd */ 2360219089Spjdstatic int 2361286705Smavreceive_write_byref(struct receive_writer_arg *rwa, 2362286705Smav struct drr_write_byref *drrwbr) 2363219089Spjd{ 2364219089Spjd dmu_tx_t *tx; 2365219089Spjd int err; 2366219089Spjd guid_map_entry_t gmesrch; 2367219089Spjd guid_map_entry_t *gmep; 2368268075Sdelphij avl_index_t where; 2369219089Spjd objset_t *ref_os = NULL; 2370219089Spjd dmu_buf_t *dbp; 2371219089Spjd 2372219089Spjd if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) 2373249195Smm return (SET_ERROR(EINVAL)); 2374219089Spjd 2375219089Spjd /* 2376219089Spjd * If the GUID of the referenced dataset is different from the 2377219089Spjd * GUID of the target dataset, find the referenced dataset. 2378219089Spjd */ 2379219089Spjd if (drrwbr->drr_toguid != drrwbr->drr_refguid) { 2380219089Spjd gmesrch.guid = drrwbr->drr_refguid; 2381286705Smav if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, 2382219089Spjd &where)) == NULL) { 2383249195Smm return (SET_ERROR(EINVAL)); 2384219089Spjd } 2385219089Spjd if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) 2386249195Smm return (SET_ERROR(EINVAL)); 2387219089Spjd } else { 2388286705Smav ref_os = rwa->os; 2389219089Spjd } 2390219089Spjd 2391339126Smav if (drrwbr->drr_object > rwa->max_object) 2392339126Smav rwa->max_object = drrwbr->drr_object; 2393339126Smav 2394268075Sdelphij err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, 2395268075Sdelphij drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); 2396268075Sdelphij if (err != 0) 2397219089Spjd return (err); 2398219089Spjd 2399286705Smav tx = dmu_tx_create(rwa->os); 2400219089Spjd 2401219089Spjd dmu_tx_hold_write(tx, drrwbr->drr_object, 2402219089Spjd drrwbr->drr_offset, drrwbr->drr_length); 2403219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2404248571Smm if (err != 0) { 2405219089Spjd dmu_tx_abort(tx); 2406219089Spjd return (err); 2407219089Spjd } 2408286705Smav dmu_write(rwa->os, drrwbr->drr_object, 2409219089Spjd drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); 2410219089Spjd dmu_buf_rele(dbp, FTAG); 2411289362Smav 2412289362Smav /* See comment in restore_write. */ 2413289362Smav save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx); 2414219089Spjd dmu_tx_commit(tx); 2415219089Spjd return (0); 2416219089Spjd} 2417219089Spjd 2418219089Spjdstatic int 2419286705Smavreceive_write_embedded(struct receive_writer_arg *rwa, 2420289362Smav struct drr_write_embedded *drrwe, void *data) 2421268075Sdelphij{ 2422268075Sdelphij dmu_tx_t *tx; 2423268075Sdelphij int err; 2424268075Sdelphij 2425289362Smav if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) 2426268075Sdelphij return (EINVAL); 2427268075Sdelphij 2428289362Smav if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) 2429268075Sdelphij return (EINVAL); 2430268075Sdelphij 2431289362Smav if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) 2432268075Sdelphij return (EINVAL); 2433289362Smav if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) 2434268075Sdelphij return (EINVAL); 2435268075Sdelphij 2436339126Smav if (drrwe->drr_object > rwa->max_object) 2437339126Smav rwa->max_object = drrwe->drr_object; 2438339126Smav 2439286705Smav tx = dmu_tx_create(rwa->os); 2440268075Sdelphij 2441289362Smav dmu_tx_hold_write(tx, drrwe->drr_object, 2442289362Smav drrwe->drr_offset, drrwe->drr_length); 2443268075Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 2444268075Sdelphij if (err != 0) { 2445268075Sdelphij dmu_tx_abort(tx); 2446268075Sdelphij return (err); 2447268075Sdelphij } 2448268075Sdelphij 2449289362Smav dmu_write_embedded(rwa->os, drrwe->drr_object, 2450289362Smav drrwe->drr_offset, data, drrwe->drr_etype, 2451289362Smav drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize, 2452286705Smav rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); 2453268075Sdelphij 2454289362Smav /* See comment in restore_write. */ 2455289362Smav save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx); 2456268075Sdelphij dmu_tx_commit(tx); 2457268075Sdelphij return (0); 2458268075Sdelphij} 2459268075Sdelphij 2460268075Sdelphijstatic int 2461286705Smavreceive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, 2462286705Smav void *data) 2463219089Spjd{ 2464219089Spjd dmu_tx_t *tx; 2465219089Spjd dmu_buf_t *db, *db_spill; 2466219089Spjd int err; 2467219089Spjd 2468219089Spjd if (drrs->drr_length < SPA_MINBLOCKSIZE || 2469286705Smav drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) 2470249195Smm return (SET_ERROR(EINVAL)); 2471219089Spjd 2472286705Smav if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) 2473249195Smm return (SET_ERROR(EINVAL)); 2474219089Spjd 2475339126Smav if (drrs->drr_object > rwa->max_object) 2476339126Smav rwa->max_object = drrs->drr_object; 2477339126Smav 2478286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); 2479219089Spjd if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { 2480219089Spjd dmu_buf_rele(db, FTAG); 2481219089Spjd return (err); 2482219089Spjd } 2483219089Spjd 2484286705Smav tx = dmu_tx_create(rwa->os); 2485219089Spjd 2486219089Spjd dmu_tx_hold_spill(tx, db->db_object); 2487219089Spjd 2488219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2489248571Smm if (err != 0) { 2490219089Spjd dmu_buf_rele(db, FTAG); 2491219089Spjd dmu_buf_rele(db_spill, FTAG); 2492219089Spjd dmu_tx_abort(tx); 2493219089Spjd return (err); 2494219089Spjd } 2495219089Spjd dmu_buf_will_dirty(db_spill, tx); 2496219089Spjd 2497219089Spjd if (db_spill->db_size < drrs->drr_length) 2498219089Spjd VERIFY(0 == dbuf_spill_set_blksz(db_spill, 2499219089Spjd drrs->drr_length, tx)); 2500219089Spjd bcopy(data, db_spill->db_data, drrs->drr_length); 2501219089Spjd 2502219089Spjd dmu_buf_rele(db, FTAG); 2503219089Spjd dmu_buf_rele(db_spill, FTAG); 2504219089Spjd 2505219089Spjd dmu_tx_commit(tx); 2506219089Spjd return (0); 2507219089Spjd} 2508219089Spjd 2509168404Spjd/* ARGSUSED */ 2510168404Spjdstatic int 2511286705Smavreceive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) 2512168404Spjd{ 2513168404Spjd int err; 2514168404Spjd 2515168404Spjd if (drrf->drr_length != -1ULL && 2516168404Spjd drrf->drr_offset + drrf->drr_length < drrf->drr_offset) 2517249195Smm return (SET_ERROR(EINVAL)); 2518168404Spjd 2519286705Smav if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) 2520249195Smm return (SET_ERROR(EINVAL)); 2521168404Spjd 2522339126Smav if (drrf->drr_object > rwa->max_object) 2523339126Smav rwa->max_object = drrf->drr_object; 2524339126Smav 2525286705Smav err = dmu_free_long_range(rwa->os, drrf->drr_object, 2526168404Spjd drrf->drr_offset, drrf->drr_length); 2527286705Smav 2528168404Spjd return (err); 2529168404Spjd} 2530168404Spjd 2531248571Smm/* used to destroy the drc_ds on error */ 2532248571Smmstatic void 2533248571Smmdmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) 2534248571Smm{ 2535289362Smav if (drc->drc_resumable) { 2536289362Smav /* wait for our resume state to be written to disk */ 2537289362Smav txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0); 2538289362Smav dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2539289362Smav } else { 2540307108Smav char name[ZFS_MAX_DATASET_NAME_LEN]; 2541289362Smav dsl_dataset_name(drc->drc_ds, name); 2542289362Smav dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2543289362Smav (void) dsl_destroy_head(name); 2544289362Smav } 2545248571Smm} 2546248571Smm 2547286587Smavstatic void 2548286705Smavreceive_cksum(struct receive_arg *ra, int len, void *buf) 2549286587Smav{ 2550286587Smav if (ra->byteswap) { 2551321610Smav (void) fletcher_4_incremental_byteswap(buf, len, &ra->cksum); 2552286587Smav } else { 2553321610Smav (void) fletcher_4_incremental_native(buf, len, &ra->cksum); 2554286587Smav } 2555286587Smav} 2556286587Smav 2557185029Spjd/* 2558286705Smav * Read the payload into a buffer of size len, and update the current record's 2559286705Smav * payload field. 2560286705Smav * Allocate ra->next_rrd and read the next record's header into 2561286705Smav * ra->next_rrd->header. 2562286587Smav * Verify checksum of payload and next record. 2563286587Smav */ 2564286587Smavstatic int 2565286705Smavreceive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) 2566286587Smav{ 2567286587Smav int err; 2568286587Smav 2569286587Smav if (len != 0) { 2570286705Smav ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); 2571289362Smav err = receive_read(ra, len, buf); 2572286587Smav if (err != 0) 2573286587Smav return (err); 2574289362Smav receive_cksum(ra, len, buf); 2575289362Smav 2576289362Smav /* note: rrd is NULL when reading the begin record's payload */ 2577289362Smav if (ra->rrd != NULL) { 2578289362Smav ra->rrd->payload = buf; 2579289362Smav ra->rrd->payload_size = len; 2580289362Smav ra->rrd->bytes_read = ra->bytes_read; 2581289362Smav } 2582286587Smav } 2583286587Smav 2584286587Smav ra->prev_cksum = ra->cksum; 2585286587Smav 2586286705Smav ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); 2587286705Smav err = receive_read(ra, sizeof (ra->next_rrd->header), 2588286705Smav &ra->next_rrd->header); 2589289362Smav ra->next_rrd->bytes_read = ra->bytes_read; 2590286705Smav if (err != 0) { 2591286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2592286705Smav ra->next_rrd = NULL; 2593286587Smav return (err); 2594286705Smav } 2595286705Smav if (ra->next_rrd->header.drr_type == DRR_BEGIN) { 2596286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2597286705Smav ra->next_rrd = NULL; 2598286587Smav return (SET_ERROR(EINVAL)); 2599286705Smav } 2600286587Smav 2601286587Smav /* 2602286587Smav * Note: checksum is of everything up to but not including the 2603286587Smav * checksum itself. 2604286587Smav */ 2605286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2606286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 2607286705Smav receive_cksum(ra, 2608286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2609286705Smav &ra->next_rrd->header); 2610286587Smav 2611286705Smav zio_cksum_t cksum_orig = 2612286705Smav ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2613286705Smav zio_cksum_t *cksump = 2614286705Smav &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2615286587Smav 2616286587Smav if (ra->byteswap) 2617286705Smav byteswap_record(&ra->next_rrd->header); 2618286587Smav 2619286587Smav if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && 2620286705Smav !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { 2621286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2622286705Smav ra->next_rrd = NULL; 2623286587Smav return (SET_ERROR(ECKSUM)); 2624286705Smav } 2625286587Smav 2626286705Smav receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); 2627286587Smav 2628286587Smav return (0); 2629286587Smav} 2630286587Smav 2631294815Smavstatic void 2632294815Smavobjlist_create(struct objlist *list) 2633294815Smav{ 2634294815Smav list_create(&list->list, sizeof (struct receive_objnode), 2635294815Smav offsetof(struct receive_objnode, node)); 2636294815Smav list->last_lookup = 0; 2637294815Smav} 2638294815Smav 2639294815Smavstatic void 2640294815Smavobjlist_destroy(struct objlist *list) 2641294815Smav{ 2642294815Smav for (struct receive_objnode *n = list_remove_head(&list->list); 2643294815Smav n != NULL; n = list_remove_head(&list->list)) { 2644294815Smav kmem_free(n, sizeof (*n)); 2645294815Smav } 2646294815Smav list_destroy(&list->list); 2647294815Smav} 2648294815Smav 2649286705Smav/* 2650294815Smav * This function looks through the objlist to see if the specified object number 2651294815Smav * is contained in the objlist. In the process, it will remove all object 2652294815Smav * numbers in the list that are smaller than the specified object number. Thus, 2653294815Smav * any lookup of an object number smaller than a previously looked up object 2654294815Smav * number will always return false; therefore, all lookups should be done in 2655294815Smav * ascending order. 2656294815Smav */ 2657294815Smavstatic boolean_t 2658294815Smavobjlist_exists(struct objlist *list, uint64_t object) 2659294815Smav{ 2660294815Smav struct receive_objnode *node = list_head(&list->list); 2661294815Smav ASSERT3U(object, >=, list->last_lookup); 2662294815Smav list->last_lookup = object; 2663294815Smav while (node != NULL && node->object < object) { 2664294815Smav VERIFY3P(node, ==, list_remove_head(&list->list)); 2665294815Smav kmem_free(node, sizeof (*node)); 2666294815Smav node = list_head(&list->list); 2667294815Smav } 2668294815Smav return (node != NULL && node->object == object); 2669294815Smav} 2670294815Smav 2671294815Smav/* 2672294815Smav * The objlist is a list of object numbers stored in ascending order. However, 2673294815Smav * the insertion of new object numbers does not seek out the correct location to 2674294815Smav * store a new object number; instead, it appends it to the list for simplicity. 2675294815Smav * Thus, any users must take care to only insert new object numbers in ascending 2676294815Smav * order. 2677294815Smav */ 2678294815Smavstatic void 2679294815Smavobjlist_insert(struct objlist *list, uint64_t object) 2680294815Smav{ 2681294815Smav struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP); 2682294815Smav node->object = object; 2683294815Smav#ifdef ZFS_DEBUG 2684294815Smav struct receive_objnode *last_object = list_tail(&list->list); 2685294815Smav uint64_t last_objnum = (last_object != NULL ? last_object->object : 0); 2686294815Smav ASSERT3U(node->object, >, last_objnum); 2687294815Smav#endif 2688294815Smav list_insert_tail(&list->list, node); 2689294815Smav} 2690294815Smav 2691294815Smav/* 2692286705Smav * Issue the prefetch reads for any necessary indirect blocks. 2693286705Smav * 2694286705Smav * We use the object ignore list to tell us whether or not to issue prefetches 2695286705Smav * for a given object. We do this for both correctness (in case the blocksize 2696286705Smav * of an object has changed) and performance (if the object doesn't exist, don't 2697286705Smav * needlessly try to issue prefetches). We also trim the list as we go through 2698286705Smav * the stream to prevent it from growing to an unbounded size. 2699286705Smav * 2700286705Smav * The object numbers within will always be in sorted order, and any write 2701286705Smav * records we see will also be in sorted order, but they're not sorted with 2702286705Smav * respect to each other (i.e. we can get several object records before 2703286705Smav * receiving each object's write records). As a result, once we've reached a 2704286705Smav * given object number, we can safely remove any reference to lower object 2705286705Smav * numbers in the ignore list. In practice, we receive up to 32 object records 2706286705Smav * before receiving write records, so the list can have up to 32 nodes in it. 2707286705Smav */ 2708286705Smav/* ARGSUSED */ 2709286705Smavstatic void 2710286705Smavreceive_read_prefetch(struct receive_arg *ra, 2711286705Smav uint64_t object, uint64_t offset, uint64_t length) 2712286705Smav{ 2713294815Smav if (!objlist_exists(&ra->ignore_objlist, object)) { 2714286705Smav dmu_prefetch(ra->os, object, 1, offset, length, 2715286705Smav ZIO_PRIORITY_SYNC_READ); 2716286705Smav } 2717286705Smav} 2718286705Smav 2719286705Smav/* 2720286705Smav * Read records off the stream, issuing any necessary prefetches. 2721286705Smav */ 2722286587Smavstatic int 2723286705Smavreceive_read_record(struct receive_arg *ra) 2724286587Smav{ 2725286587Smav int err; 2726286587Smav 2727286705Smav switch (ra->rrd->header.drr_type) { 2728286587Smav case DRR_OBJECT: 2729286587Smav { 2730286705Smav struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; 2731286705Smav uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8); 2732286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2733286705Smav dmu_object_info_t doi; 2734286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2735286705Smav if (err != 0) { 2736286705Smav kmem_free(buf, size); 2737286587Smav return (err); 2738286705Smav } 2739286705Smav err = dmu_object_info(ra->os, drro->drr_object, &doi); 2740286705Smav /* 2741286705Smav * See receive_read_prefetch for an explanation why we're 2742286705Smav * storing this object in the ignore_obj_list. 2743286705Smav */ 2744286705Smav if (err == ENOENT || 2745286705Smav (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { 2746294815Smav objlist_insert(&ra->ignore_objlist, drro->drr_object); 2747286705Smav err = 0; 2748286705Smav } 2749286705Smav return (err); 2750286587Smav } 2751286587Smav case DRR_FREEOBJECTS: 2752286587Smav { 2753286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2754286705Smav return (err); 2755286587Smav } 2756286587Smav case DRR_WRITE: 2757286587Smav { 2758286705Smav struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; 2759321535Smav arc_buf_t *abuf; 2760321535Smav boolean_t is_meta = DMU_OT_IS_METADATA(drrw->drr_type); 2761321535Smav if (DRR_WRITE_COMPRESSED(drrw)) { 2762321535Smav ASSERT3U(drrw->drr_compressed_size, >, 0); 2763321535Smav ASSERT3U(drrw->drr_logical_size, >=, 2764321535Smav drrw->drr_compressed_size); 2765321535Smav ASSERT(!is_meta); 2766321535Smav abuf = arc_loan_compressed_buf( 2767321535Smav dmu_objset_spa(ra->os), 2768321535Smav drrw->drr_compressed_size, drrw->drr_logical_size, 2769321535Smav drrw->drr_compressiontype); 2770321535Smav } else { 2771321535Smav abuf = arc_loan_buf(dmu_objset_spa(ra->os), 2772321535Smav is_meta, drrw->drr_logical_size); 2773321535Smav } 2774286587Smav 2775286705Smav err = receive_read_payload_and_next_header(ra, 2776321535Smav DRR_WRITE_PAYLOAD_SIZE(drrw), abuf->b_data); 2777286705Smav if (err != 0) { 2778286705Smav dmu_return_arcbuf(abuf); 2779286587Smav return (err); 2780286705Smav } 2781286705Smav ra->rrd->write_buf = abuf; 2782286705Smav receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, 2783321535Smav drrw->drr_logical_size); 2784286587Smav return (err); 2785286587Smav } 2786286587Smav case DRR_WRITE_BYREF: 2787286587Smav { 2788286705Smav struct drr_write_byref *drrwb = 2789286705Smav &ra->rrd->header.drr_u.drr_write_byref; 2790286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2791286705Smav receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, 2792286705Smav drrwb->drr_length); 2793286705Smav return (err); 2794286587Smav } 2795286587Smav case DRR_WRITE_EMBEDDED: 2796286587Smav { 2797286587Smav struct drr_write_embedded *drrwe = 2798286705Smav &ra->rrd->header.drr_u.drr_write_embedded; 2799286705Smav uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); 2800286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2801286705Smav 2802286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2803286705Smav if (err != 0) { 2804286705Smav kmem_free(buf, size); 2805286587Smav return (err); 2806286705Smav } 2807286705Smav 2808286705Smav receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, 2809286705Smav drrwe->drr_length); 2810286705Smav return (err); 2811286587Smav } 2812286587Smav case DRR_FREE: 2813286587Smav { 2814286705Smav /* 2815286705Smav * It might be beneficial to prefetch indirect blocks here, but 2816286705Smav * we don't really have the data to decide for sure. 2817286705Smav */ 2818286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2819286705Smav return (err); 2820286587Smav } 2821286587Smav case DRR_END: 2822286587Smav { 2823286705Smav struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; 2824286587Smav if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) 2825289362Smav return (SET_ERROR(ECKSUM)); 2826286587Smav return (0); 2827286587Smav } 2828286587Smav case DRR_SPILL: 2829286587Smav { 2830286705Smav struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; 2831286705Smav void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP); 2832286705Smav err = receive_read_payload_and_next_header(ra, drrs->drr_length, 2833286705Smav buf); 2834286587Smav if (err != 0) 2835286705Smav kmem_free(buf, drrs->drr_length); 2836286705Smav return (err); 2837286587Smav } 2838286587Smav default: 2839286587Smav return (SET_ERROR(EINVAL)); 2840286587Smav } 2841286587Smav} 2842286587Smav 2843286587Smav/* 2844286705Smav * Commit the records to the pool. 2845286705Smav */ 2846286705Smavstatic int 2847286705Smavreceive_process_record(struct receive_writer_arg *rwa, 2848286705Smav struct receive_record_arg *rrd) 2849286705Smav{ 2850286705Smav int err; 2851286705Smav 2852289362Smav /* Processing in order, therefore bytes_read should be increasing. */ 2853289362Smav ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read); 2854289362Smav rwa->bytes_read = rrd->bytes_read; 2855289362Smav 2856286705Smav switch (rrd->header.drr_type) { 2857286705Smav case DRR_OBJECT: 2858286705Smav { 2859286705Smav struct drr_object *drro = &rrd->header.drr_u.drr_object; 2860286705Smav err = receive_object(rwa, drro, rrd->payload); 2861286705Smav kmem_free(rrd->payload, rrd->payload_size); 2862286705Smav rrd->payload = NULL; 2863286705Smav return (err); 2864286705Smav } 2865286705Smav case DRR_FREEOBJECTS: 2866286705Smav { 2867286705Smav struct drr_freeobjects *drrfo = 2868286705Smav &rrd->header.drr_u.drr_freeobjects; 2869286705Smav return (receive_freeobjects(rwa, drrfo)); 2870286705Smav } 2871286705Smav case DRR_WRITE: 2872286705Smav { 2873286705Smav struct drr_write *drrw = &rrd->header.drr_u.drr_write; 2874286705Smav err = receive_write(rwa, drrw, rrd->write_buf); 2875286705Smav /* if receive_write() is successful, it consumes the arc_buf */ 2876286705Smav if (err != 0) 2877286705Smav dmu_return_arcbuf(rrd->write_buf); 2878286705Smav rrd->write_buf = NULL; 2879286705Smav rrd->payload = NULL; 2880286705Smav return (err); 2881286705Smav } 2882286705Smav case DRR_WRITE_BYREF: 2883286705Smav { 2884286705Smav struct drr_write_byref *drrwbr = 2885286705Smav &rrd->header.drr_u.drr_write_byref; 2886286705Smav return (receive_write_byref(rwa, drrwbr)); 2887286705Smav } 2888286705Smav case DRR_WRITE_EMBEDDED: 2889286705Smav { 2890286705Smav struct drr_write_embedded *drrwe = 2891286705Smav &rrd->header.drr_u.drr_write_embedded; 2892286705Smav err = receive_write_embedded(rwa, drrwe, rrd->payload); 2893286705Smav kmem_free(rrd->payload, rrd->payload_size); 2894286705Smav rrd->payload = NULL; 2895286705Smav return (err); 2896286705Smav } 2897286705Smav case DRR_FREE: 2898286705Smav { 2899286705Smav struct drr_free *drrf = &rrd->header.drr_u.drr_free; 2900286705Smav return (receive_free(rwa, drrf)); 2901286705Smav } 2902286705Smav case DRR_SPILL: 2903286705Smav { 2904286705Smav struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; 2905286705Smav err = receive_spill(rwa, drrs, rrd->payload); 2906286705Smav kmem_free(rrd->payload, rrd->payload_size); 2907286705Smav rrd->payload = NULL; 2908286705Smav return (err); 2909286705Smav } 2910286705Smav default: 2911286705Smav return (SET_ERROR(EINVAL)); 2912286705Smav } 2913286705Smav} 2914286705Smav 2915286705Smav/* 2916286705Smav * dmu_recv_stream's worker thread; pull records off the queue, and then call 2917286705Smav * receive_process_record When we're done, signal the main thread and exit. 2918286705Smav */ 2919286705Smavstatic void 2920286705Smavreceive_writer_thread(void *arg) 2921286705Smav{ 2922286705Smav struct receive_writer_arg *rwa = arg; 2923286705Smav struct receive_record_arg *rrd; 2924286705Smav for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; 2925286705Smav rrd = bqueue_dequeue(&rwa->q)) { 2926286705Smav /* 2927286705Smav * If there's an error, the main thread will stop putting things 2928286705Smav * on the queue, but we need to clear everything in it before we 2929286705Smav * can exit. 2930286705Smav */ 2931286705Smav if (rwa->err == 0) { 2932286705Smav rwa->err = receive_process_record(rwa, rrd); 2933286705Smav } else if (rrd->write_buf != NULL) { 2934286705Smav dmu_return_arcbuf(rrd->write_buf); 2935286705Smav rrd->write_buf = NULL; 2936286705Smav rrd->payload = NULL; 2937286705Smav } else if (rrd->payload != NULL) { 2938286705Smav kmem_free(rrd->payload, rrd->payload_size); 2939286705Smav rrd->payload = NULL; 2940286705Smav } 2941286705Smav kmem_free(rrd, sizeof (*rrd)); 2942286705Smav } 2943286705Smav kmem_free(rrd, sizeof (*rrd)); 2944286705Smav mutex_enter(&rwa->mutex); 2945286705Smav rwa->done = B_TRUE; 2946286705Smav cv_signal(&rwa->cv); 2947286705Smav mutex_exit(&rwa->mutex); 2948286705Smav thread_exit(); 2949286705Smav} 2950286705Smav 2951289362Smavstatic int 2952289362Smavresume_check(struct receive_arg *ra, nvlist_t *begin_nvl) 2953289362Smav{ 2954289362Smav uint64_t val; 2955289362Smav objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset; 2956289362Smav uint64_t dsobj = dmu_objset_id(ra->os); 2957289362Smav uint64_t resume_obj, resume_off; 2958289362Smav 2959289362Smav if (nvlist_lookup_uint64(begin_nvl, 2960289362Smav "resume_object", &resume_obj) != 0 || 2961289362Smav nvlist_lookup_uint64(begin_nvl, 2962289362Smav "resume_offset", &resume_off) != 0) { 2963289362Smav return (SET_ERROR(EINVAL)); 2964289362Smav } 2965289362Smav VERIFY0(zap_lookup(mos, dsobj, 2966289362Smav DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val)); 2967289362Smav if (resume_obj != val) 2968289362Smav return (SET_ERROR(EINVAL)); 2969289362Smav VERIFY0(zap_lookup(mos, dsobj, 2970289362Smav DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val)); 2971289362Smav if (resume_off != val) 2972289362Smav return (SET_ERROR(EINVAL)); 2973289362Smav 2974289362Smav return (0); 2975289362Smav} 2976289362Smav 2977286705Smav/* 2978286705Smav * Read in the stream's records, one by one, and apply them to the pool. There 2979286705Smav * are two threads involved; the thread that calls this function will spin up a 2980286705Smav * worker thread, read the records off the stream one by one, and issue 2981286705Smav * prefetches for any necessary indirect blocks. It will then push the records 2982286705Smav * onto an internal blocking queue. The worker thread will pull the records off 2983286705Smav * the queue, and actually write the data into the DMU. This way, the worker 2984286705Smav * thread doesn't have to wait for reads to complete, since everything it needs 2985286705Smav * (the indirect blocks) will be prefetched. 2986286705Smav * 2987185029Spjd * NB: callers *must* call dmu_recv_end() if this succeeds. 2988185029Spjd */ 2989168404Spjdint 2990219089Spjddmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp, 2991219089Spjd int cleanup_fd, uint64_t *action_handlep) 2992168404Spjd{ 2993286587Smav int err = 0; 2994286705Smav struct receive_arg ra = { 0 }; 2995286705Smav struct receive_writer_arg rwa = { 0 }; 2996219089Spjd int featureflags; 2997289362Smav nvlist_t *begin_nvl = NULL; 2998168404Spjd 2999248571Smm ra.byteswap = drc->drc_byteswap; 3000248571Smm ra.cksum = drc->drc_cksum; 3001219089Spjd ra.td = curthread; 3002185029Spjd ra.fp = fp; 3003185029Spjd ra.voff = *voffp; 3004289362Smav 3005289362Smav if (dsl_dataset_is_zapified(drc->drc_ds)) { 3006289362Smav (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset, 3007289362Smav drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES, 3008289362Smav sizeof (ra.bytes_read), 1, &ra.bytes_read); 3009289362Smav } 3010289362Smav 3011294815Smav objlist_create(&ra.ignore_objlist); 3012168404Spjd 3013185029Spjd /* these were verified in dmu_recv_begin */ 3014248571Smm ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, 3015219089Spjd DMU_SUBSTREAM); 3016248571Smm ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); 3017168404Spjd 3018168404Spjd /* 3019168404Spjd * Open the objset we are modifying. 3020168404Spjd */ 3021286587Smav VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra.os)); 3022168404Spjd 3023275782Sdelphij ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); 3024168404Spjd 3025219089Spjd featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); 3026219089Spjd 3027219089Spjd /* if this stream is dedup'ed, set up the avl tree for guid mapping */ 3028219089Spjd if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { 3029219089Spjd minor_t minor; 3030219089Spjd 3031219089Spjd if (cleanup_fd == -1) { 3032249195Smm ra.err = SET_ERROR(EBADF); 3033219089Spjd goto out; 3034219089Spjd } 3035219089Spjd ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); 3036248571Smm if (ra.err != 0) { 3037219089Spjd cleanup_fd = -1; 3038219089Spjd goto out; 3039219089Spjd } 3040219089Spjd 3041219089Spjd if (*action_handlep == 0) { 3042286705Smav rwa.guid_to_ds_map = 3043219089Spjd kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); 3044286705Smav avl_create(rwa.guid_to_ds_map, guid_compare, 3045219089Spjd sizeof (guid_map_entry_t), 3046219089Spjd offsetof(guid_map_entry_t, avlnode)); 3047286587Smav err = zfs_onexit_add_cb(minor, 3048286705Smav free_guid_map_onexit, rwa.guid_to_ds_map, 3049219089Spjd action_handlep); 3050248571Smm if (ra.err != 0) 3051219089Spjd goto out; 3052219089Spjd } else { 3053286587Smav err = zfs_onexit_cb_data(minor, *action_handlep, 3054286705Smav (void **)&rwa.guid_to_ds_map); 3055248571Smm if (ra.err != 0) 3056219089Spjd goto out; 3057219089Spjd } 3058221263Smm 3059286705Smav drc->drc_guid_to_ds_map = rwa.guid_to_ds_map; 3060219089Spjd } 3061219089Spjd 3062289362Smav uint32_t payloadlen = drc->drc_drr_begin->drr_payloadlen; 3063289362Smav void *payload = NULL; 3064289362Smav if (payloadlen != 0) 3065289362Smav payload = kmem_alloc(payloadlen, KM_SLEEP); 3066289362Smav 3067289362Smav err = receive_read_payload_and_next_header(&ra, payloadlen, payload); 3068289362Smav if (err != 0) { 3069289362Smav if (payloadlen != 0) 3070289362Smav kmem_free(payload, payloadlen); 3071286587Smav goto out; 3072289362Smav } 3073289362Smav if (payloadlen != 0) { 3074289362Smav err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP); 3075289362Smav kmem_free(payload, payloadlen); 3076289362Smav if (err != 0) 3077289362Smav goto out; 3078289362Smav } 3079286587Smav 3080289362Smav if (featureflags & DMU_BACKUP_FEATURE_RESUMING) { 3081289362Smav err = resume_check(&ra, begin_nvl); 3082289362Smav if (err != 0) 3083289362Smav goto out; 3084289362Smav } 3085289362Smav 3086286705Smav (void) bqueue_init(&rwa.q, zfs_recv_queue_length, 3087286705Smav offsetof(struct receive_record_arg, node)); 3088286705Smav cv_init(&rwa.cv, NULL, CV_DEFAULT, NULL); 3089286705Smav mutex_init(&rwa.mutex, NULL, MUTEX_DEFAULT, NULL); 3090286705Smav rwa.os = ra.os; 3091286705Smav rwa.byteswap = drc->drc_byteswap; 3092289362Smav rwa.resumable = drc->drc_resumable; 3093286705Smav 3094287280Sdelphij (void) thread_create(NULL, 0, receive_writer_thread, &rwa, 0, &p0, 3095286705Smav TS_RUN, minclsyspri); 3096286705Smav /* 3097286705Smav * We're reading rwa.err without locks, which is safe since we are the 3098286705Smav * only reader, and the worker thread is the only writer. It's ok if we 3099286705Smav * miss a write for an iteration or two of the loop, since the writer 3100286705Smav * thread will keep freeing records we send it until we send it an eos 3101286705Smav * marker. 3102286705Smav * 3103286705Smav * We can leave this loop in 3 ways: First, if rwa.err is 3104286705Smav * non-zero. In that case, the writer thread will free the rrd we just 3105286705Smav * pushed. Second, if we're interrupted; in that case, either it's the 3106286705Smav * first loop and ra.rrd was never allocated, or it's later, and ra.rrd 3107286705Smav * has been handed off to the writer thread who will free it. Finally, 3108286705Smav * if receive_read_record fails or we're at the end of the stream, then 3109286705Smav * we free ra.rrd and exit. 3110286705Smav */ 3111286705Smav while (rwa.err == 0) { 3112185029Spjd if (issig(JUSTLOOKING) && issig(FORREAL)) { 3113286587Smav err = SET_ERROR(EINTR); 3114286587Smav break; 3115168404Spjd } 3116168404Spjd 3117286705Smav ASSERT3P(ra.rrd, ==, NULL); 3118286705Smav ra.rrd = ra.next_rrd; 3119286705Smav ra.next_rrd = NULL; 3120286705Smav /* Allocates and loads header into ra.next_rrd */ 3121286705Smav err = receive_read_record(&ra); 3122168404Spjd 3123286705Smav if (ra.rrd->header.drr_type == DRR_END || err != 0) { 3124286705Smav kmem_free(ra.rrd, sizeof (*ra.rrd)); 3125286705Smav ra.rrd = NULL; 3126168404Spjd break; 3127286705Smav } 3128286705Smav 3129286705Smav bqueue_enqueue(&rwa.q, ra.rrd, 3130286705Smav sizeof (struct receive_record_arg) + ra.rrd->payload_size); 3131286705Smav ra.rrd = NULL; 3132168404Spjd } 3133286705Smav if (ra.next_rrd == NULL) 3134286705Smav ra.next_rrd = kmem_zalloc(sizeof (*ra.next_rrd), KM_SLEEP); 3135286705Smav ra.next_rrd->eos_marker = B_TRUE; 3136286705Smav bqueue_enqueue(&rwa.q, ra.next_rrd, 1); 3137168404Spjd 3138286705Smav mutex_enter(&rwa.mutex); 3139286705Smav while (!rwa.done) { 3140286705Smav cv_wait(&rwa.cv, &rwa.mutex); 3141286705Smav } 3142286705Smav mutex_exit(&rwa.mutex); 3143286705Smav 3144339126Smav /* 3145339126Smav * If we are receiving a full stream as a clone, all object IDs which 3146339126Smav * are greater than the maximum ID referenced in the stream are 3147339126Smav * by definition unused and must be freed. Note that it's possible that 3148339126Smav * we've resumed this send and the first record we received was the END 3149339126Smav * record. In that case, max_object would be 0, but we shouldn't start 3150339126Smav * freeing all objects from there; instead we should start from the 3151339126Smav * resumeobj. 3152339126Smav */ 3153339126Smav if (drc->drc_clone && drc->drc_drrb->drr_fromguid == 0) { 3154339126Smav uint64_t obj; 3155339126Smav if (nvlist_lookup_uint64(begin_nvl, "resume_object", &obj) != 0) 3156339126Smav obj = 0; 3157339126Smav if (rwa.max_object > obj) 3158339126Smav obj = rwa.max_object; 3159339126Smav obj++; 3160339126Smav int free_err = 0; 3161339126Smav int next_err = 0; 3162339126Smav 3163339126Smav while (next_err == 0) { 3164339126Smav free_err = dmu_free_long_object(rwa.os, obj); 3165339126Smav if (free_err != 0 && free_err != ENOENT) 3166339126Smav break; 3167339126Smav 3168339126Smav next_err = dmu_object_next(rwa.os, &obj, FALSE, 0); 3169339126Smav } 3170339126Smav 3171339126Smav if (err == 0) { 3172339126Smav if (free_err != 0 && free_err != ENOENT) 3173339126Smav err = free_err; 3174339126Smav else if (next_err != ESRCH) 3175339126Smav err = next_err; 3176339126Smav } 3177339126Smav } 3178339126Smav 3179286705Smav cv_destroy(&rwa.cv); 3180286705Smav mutex_destroy(&rwa.mutex); 3181286705Smav bqueue_destroy(&rwa.q); 3182286705Smav if (err == 0) 3183286705Smav err = rwa.err; 3184286705Smav 3185168404Spjdout: 3186289362Smav nvlist_free(begin_nvl); 3187219089Spjd if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) 3188219089Spjd zfs_onexit_fd_rele(cleanup_fd); 3189168404Spjd 3190286587Smav if (err != 0) { 3191168404Spjd /* 3192289362Smav * Clean up references. If receive is not resumable, 3193289362Smav * destroy what we created, so we don't leave it in 3194289362Smav * the inconsistent state. 3195168404Spjd */ 3196248571Smm dmu_recv_cleanup_ds(drc); 3197168404Spjd } 3198168404Spjd 3199185029Spjd *voffp = ra.voff; 3200294815Smav objlist_destroy(&ra.ignore_objlist); 3201286587Smav return (err); 3202168404Spjd} 3203185029Spjd 3204185029Spjdstatic int 3205248571Smmdmu_recv_end_check(void *arg, dmu_tx_t *tx) 3206185029Spjd{ 3207248571Smm dmu_recv_cookie_t *drc = arg; 3208248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 3209248571Smm int error; 3210185029Spjd 3211248571Smm ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); 3212248571Smm 3213248571Smm if (!drc->drc_newfs) { 3214248571Smm dsl_dataset_t *origin_head; 3215248571Smm 3216248571Smm error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); 3217248571Smm if (error != 0) 3218248571Smm return (error); 3219253820Sdelphij if (drc->drc_force) { 3220253820Sdelphij /* 3221253820Sdelphij * We will destroy any snapshots in tofs (i.e. before 3222253820Sdelphij * origin_head) that are after the origin (which is 3223253820Sdelphij * the snap before drc_ds, because drc_ds can not 3224253820Sdelphij * have any snaps of its own). 3225253820Sdelphij */ 3226275782Sdelphij uint64_t obj; 3227275782Sdelphij 3228275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3229275782Sdelphij while (obj != 3230275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 3231253820Sdelphij dsl_dataset_t *snap; 3232253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 3233253820Sdelphij &snap); 3234253820Sdelphij if (error != 0) 3235282473Savg break; 3236253820Sdelphij if (snap->ds_dir != origin_head->ds_dir) 3237253820Sdelphij error = SET_ERROR(EINVAL); 3238253820Sdelphij if (error == 0) { 3239253820Sdelphij error = dsl_destroy_snapshot_check_impl( 3240253820Sdelphij snap, B_FALSE); 3241253820Sdelphij } 3242275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3243253820Sdelphij dsl_dataset_rele(snap, FTAG); 3244253820Sdelphij if (error != 0) 3245282473Savg break; 3246253820Sdelphij } 3247282473Savg if (error != 0) { 3248282473Savg dsl_dataset_rele(origin_head, FTAG); 3249282473Savg return (error); 3250282473Savg } 3251253820Sdelphij } 3252248571Smm error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, 3253253816Sdelphij origin_head, drc->drc_force, drc->drc_owner, tx); 3254248571Smm if (error != 0) { 3255248571Smm dsl_dataset_rele(origin_head, FTAG); 3256248571Smm return (error); 3257248571Smm } 3258248571Smm error = dsl_dataset_snapshot_check_impl(origin_head, 3259264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 3260248571Smm dsl_dataset_rele(origin_head, FTAG); 3261248571Smm if (error != 0) 3262248571Smm return (error); 3263248571Smm 3264248571Smm error = dsl_destroy_head_check_impl(drc->drc_ds, 1); 3265248571Smm } else { 3266248571Smm error = dsl_dataset_snapshot_check_impl(drc->drc_ds, 3267264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 3268248571Smm } 3269248571Smm return (error); 3270185029Spjd} 3271185029Spjd 3272185029Spjdstatic void 3273248571Smmdmu_recv_end_sync(void *arg, dmu_tx_t *tx) 3274185029Spjd{ 3275248571Smm dmu_recv_cookie_t *drc = arg; 3276248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 3277185029Spjd 3278248571Smm spa_history_log_internal_ds(drc->drc_ds, "finish receiving", 3279248571Smm tx, "snap=%s", drc->drc_tosnap); 3280185029Spjd 3281248571Smm if (!drc->drc_newfs) { 3282248571Smm dsl_dataset_t *origin_head; 3283185029Spjd 3284248571Smm VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, 3285248571Smm &origin_head)); 3286253820Sdelphij 3287253820Sdelphij if (drc->drc_force) { 3288253820Sdelphij /* 3289253820Sdelphij * Destroy any snapshots of drc_tofs (origin_head) 3290253820Sdelphij * after the origin (the snap before drc_ds). 3291253820Sdelphij */ 3292275782Sdelphij uint64_t obj; 3293275782Sdelphij 3294275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3295275782Sdelphij while (obj != 3296275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 3297253820Sdelphij dsl_dataset_t *snap; 3298253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, 3299253820Sdelphij &snap)); 3300253820Sdelphij ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); 3301275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3302253820Sdelphij dsl_destroy_snapshot_sync_impl(snap, 3303253820Sdelphij B_FALSE, tx); 3304253820Sdelphij dsl_dataset_rele(snap, FTAG); 3305253820Sdelphij } 3306253820Sdelphij } 3307253820Sdelphij VERIFY3P(drc->drc_ds->ds_prev, ==, 3308253820Sdelphij origin_head->ds_prev); 3309253820Sdelphij 3310248571Smm dsl_dataset_clone_swap_sync_impl(drc->drc_ds, 3311248571Smm origin_head, tx); 3312248571Smm dsl_dataset_snapshot_sync_impl(origin_head, 3313248571Smm drc->drc_tosnap, tx); 3314248571Smm 3315248571Smm /* set snapshot's creation time and guid */ 3316248571Smm dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); 3317275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = 3318248571Smm drc->drc_drrb->drr_creation_time; 3319275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_guid = 3320248571Smm drc->drc_drrb->drr_toguid; 3321275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= 3322248571Smm ~DS_FLAG_INCONSISTENT; 3323248571Smm 3324248571Smm dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 3325275782Sdelphij dsl_dataset_phys(origin_head)->ds_flags &= 3326275782Sdelphij ~DS_FLAG_INCONSISTENT; 3327248571Smm 3328307288Smav drc->drc_newsnapobj = 3329307288Smav dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3330307288Smav 3331248571Smm dsl_dataset_rele(origin_head, FTAG); 3332248571Smm dsl_destroy_head_sync_impl(drc->drc_ds, tx); 3333253816Sdelphij 3334253816Sdelphij if (drc->drc_owner != NULL) 3335253816Sdelphij VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); 3336248571Smm } else { 3337248571Smm dsl_dataset_t *ds = drc->drc_ds; 3338248571Smm 3339248571Smm dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); 3340248571Smm 3341248571Smm /* set snapshot's creation time and guid */ 3342248571Smm dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 3343275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_creation_time = 3344248571Smm drc->drc_drrb->drr_creation_time; 3345275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_guid = 3346275782Sdelphij drc->drc_drrb->drr_toguid; 3347275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_flags &= 3348275782Sdelphij ~DS_FLAG_INCONSISTENT; 3349248571Smm 3350248571Smm dmu_buf_will_dirty(ds->ds_dbuf, tx); 3351275782Sdelphij dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 3352289362Smav if (dsl_dataset_has_resume_receive_state(ds)) { 3353289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3354289362Smav DS_FIELD_RESUME_FROMGUID, tx); 3355289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3356289362Smav DS_FIELD_RESUME_OBJECT, tx); 3357289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3358289362Smav DS_FIELD_RESUME_OFFSET, tx); 3359289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3360289362Smav DS_FIELD_RESUME_BYTES, tx); 3361289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3362289362Smav DS_FIELD_RESUME_TOGUID, tx); 3363289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3364289362Smav DS_FIELD_RESUME_TONAME, tx); 3365289362Smav } 3366307288Smav drc->drc_newsnapobj = 3367307288Smav dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; 3368248571Smm } 3369248571Smm /* 3370248571Smm * Release the hold from dmu_recv_begin. This must be done before 3371248571Smm * we return to open context, so that when we free the dataset's dnode, 3372248571Smm * we can evict its bonus buffer. 3373248571Smm */ 3374248571Smm dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 3375248571Smm drc->drc_ds = NULL; 3376185029Spjd} 3377185029Spjd 3378219089Spjdstatic int 3379248571Smmadd_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) 3380221263Smm{ 3381248571Smm dsl_pool_t *dp; 3382221263Smm dsl_dataset_t *snapds; 3383221263Smm guid_map_entry_t *gmep; 3384221263Smm int err; 3385221263Smm 3386221263Smm ASSERT(guid_map != NULL); 3387221263Smm 3388248571Smm err = dsl_pool_hold(name, FTAG, &dp); 3389248571Smm if (err != 0) 3390248571Smm return (err); 3391249356Smm gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); 3392249196Smm err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); 3393221263Smm if (err == 0) { 3394275782Sdelphij gmep->guid = dsl_dataset_phys(snapds)->ds_guid; 3395221263Smm gmep->gme_ds = snapds; 3396221263Smm avl_add(guid_map, gmep); 3397248571Smm dsl_dataset_long_hold(snapds, gmep); 3398249196Smm } else 3399249356Smm kmem_free(gmep, sizeof (*gmep)); 3400221263Smm 3401248571Smm dsl_pool_rele(dp, FTAG); 3402221263Smm return (err); 3403221263Smm} 3404221263Smm 3405248571Smmstatic int dmu_recv_end_modified_blocks = 3; 3406248571Smm 3407221263Smmstatic int 3408219089Spjddmu_recv_existing_end(dmu_recv_cookie_t *drc) 3409185029Spjd{ 3410248571Smm#ifdef _KERNEL 3411248571Smm /* 3412248571Smm * We will be destroying the ds; make sure its origin is unmounted if 3413248571Smm * necessary. 3414248571Smm */ 3415307108Smav char name[ZFS_MAX_DATASET_NAME_LEN]; 3416248571Smm dsl_dataset_name(drc->drc_ds, name); 3417248571Smm zfs_destroy_unmount_origin(name); 3418248571Smm#endif 3419185029Spjd 3420307288Smav return (dsl_sync_task(drc->drc_tofs, 3421248571Smm dmu_recv_end_check, dmu_recv_end_sync, drc, 3422307288Smav dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); 3423185029Spjd} 3424219089Spjd 3425219089Spjdstatic int 3426219089Spjddmu_recv_new_end(dmu_recv_cookie_t *drc) 3427219089Spjd{ 3428307288Smav return (dsl_sync_task(drc->drc_tofs, 3429307288Smav dmu_recv_end_check, dmu_recv_end_sync, drc, 3430307288Smav dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); 3431307288Smav} 3432307288Smav 3433307288Smavint 3434307288Smavdmu_recv_end(dmu_recv_cookie_t *drc, void *owner) 3435307288Smav{ 3436248571Smm int error; 3437219089Spjd 3438307288Smav drc->drc_owner = owner; 3439219089Spjd 3440307288Smav if (drc->drc_newfs) 3441307288Smav error = dmu_recv_new_end(drc); 3442307288Smav else 3443307288Smav error = dmu_recv_existing_end(drc); 3444307288Smav 3445248571Smm if (error != 0) { 3446248571Smm dmu_recv_cleanup_ds(drc); 3447248571Smm } else if (drc->drc_guid_to_ds_map != NULL) { 3448248571Smm (void) add_ds_to_guidmap(drc->drc_tofs, 3449248571Smm drc->drc_guid_to_ds_map, 3450248571Smm drc->drc_newsnapobj); 3451219089Spjd } 3452248571Smm return (error); 3453219089Spjd} 3454219089Spjd 3455253821Sdelphij/* 3456253821Sdelphij * Return TRUE if this objset is currently being received into. 3457253821Sdelphij */ 3458253821Sdelphijboolean_t 3459253821Sdelphijdmu_objset_is_receiving(objset_t *os) 3460253821Sdelphij{ 3461253821Sdelphij return (os->os_dsl_dataset != NULL && 3462253821Sdelphij os->os_dsl_dataset->ds_owner == dmu_recv_tag); 3463253821Sdelphij} 3464