dmu_send.c revision 308082
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] 30221263Smm */ 31168404Spjd 32168404Spjd#include <sys/dmu.h> 33168404Spjd#include <sys/dmu_impl.h> 34168404Spjd#include <sys/dmu_tx.h> 35168404Spjd#include <sys/dbuf.h> 36168404Spjd#include <sys/dnode.h> 37168404Spjd#include <sys/zfs_context.h> 38168404Spjd#include <sys/dmu_objset.h> 39168404Spjd#include <sys/dmu_traverse.h> 40168404Spjd#include <sys/dsl_dataset.h> 41168404Spjd#include <sys/dsl_dir.h> 42219089Spjd#include <sys/dsl_prop.h> 43168404Spjd#include <sys/dsl_pool.h> 44168404Spjd#include <sys/dsl_synctask.h> 45168404Spjd#include <sys/zfs_ioctl.h> 46168404Spjd#include <sys/zap.h> 47168404Spjd#include <sys/zio_checksum.h> 48219089Spjd#include <sys/zfs_znode.h> 49219089Spjd#include <zfs_fletcher.h> 50219089Spjd#include <sys/avl.h> 51219089Spjd#include <sys/ddt.h> 52219089Spjd#include <sys/zfs_onexit.h> 53248571Smm#include <sys/dmu_send.h> 54248571Smm#include <sys/dsl_destroy.h> 55268075Sdelphij#include <sys/blkptr.h> 56260183Sdelphij#include <sys/dsl_bookmark.h> 57268075Sdelphij#include <sys/zfeature.h> 58286705Smav#include <sys/bqueue.h> 59168404Spjd 60268075Sdelphij#ifdef __FreeBSD__ 61268075Sdelphij#undef dump_write 62268075Sdelphij#define dump_write dmu_dump_write 63268075Sdelphij#endif 64268075Sdelphij 65228103Smm/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ 66228103Smmint zfs_send_corrupt_data = B_FALSE; 67286705Smavint zfs_send_queue_length = 16 * 1024 * 1024; 68286705Smavint zfs_recv_queue_length = 16 * 1024 * 1024; 69296516Smav/* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */ 70296516Smavint zfs_send_set_freerecords_bit = B_TRUE; 71228103Smm 72296516Smav#ifdef _KERNEL 73296516SmavTUNABLE_INT("vfs.zfs.send_set_freerecords_bit", &zfs_send_set_freerecords_bit); 74296516Smav#endif 75296516Smav 76185029Spjdstatic char *dmu_recv_tag = "dmu_recv_tag"; 77289362Smavconst char *recv_clone_name = "%recv"; 78185029Spjd 79286705Smav#define BP_SPAN(datablkszsec, indblkshift, level) \ 80286705Smav (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \ 81286705Smav (level) * (indblkshift - SPA_BLKPTRSHIFT))) 82286705Smav 83289362Smavstatic void byteswap_record(dmu_replay_record_t *drr); 84289362Smav 85286705Smavstruct send_thread_arg { 86286705Smav bqueue_t q; 87286705Smav dsl_dataset_t *ds; /* Dataset to traverse */ 88286705Smav uint64_t fromtxg; /* Traverse from this txg */ 89286705Smav int flags; /* flags to pass to traverse_dataset */ 90286705Smav int error_code; 91286705Smav boolean_t cancel; 92289362Smav zbookmark_phys_t resume; 93286705Smav}; 94286705Smav 95286705Smavstruct send_block_record { 96286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 97286705Smav blkptr_t bp; 98286705Smav zbookmark_phys_t zb; 99286705Smav uint8_t indblkshift; 100286705Smav uint16_t datablkszsec; 101286705Smav bqueue_node_t ln; 102286705Smav}; 103286705Smav 104168404Spjdstatic int 105235222Smmdump_bytes(dmu_sendarg_t *dsp, void *buf, int len) 106168404Spjd{ 107289362Smav dsl_dataset_t *ds = dmu_objset_ds(dsp->dsa_os); 108168404Spjd struct uio auio; 109168404Spjd struct iovec aiov; 110297509Smav 111297509Smav /* 112297509Smav * The code does not rely on this (len being a multiple of 8). We keep 113297509Smav * this assertion because of the corresponding assertion in 114297509Smav * receive_read(). Keeping this assertion ensures that we do not 115297509Smav * inadvertently break backwards compatibility (causing the assertion 116297509Smav * in receive_read() to trigger on old software). 117297509Smav * 118297509Smav * Removing the assertions could be rolled into a new feature that uses 119297509Smav * data that isn't 8-byte aligned; if the assertions were removed, a 120297509Smav * feature flag would have to be added. 121297509Smav */ 122297509Smav 123240415Smm ASSERT0(len % 8); 124168404Spjd 125168404Spjd aiov.iov_base = buf; 126168404Spjd aiov.iov_len = len; 127168404Spjd auio.uio_iov = &aiov; 128168404Spjd auio.uio_iovcnt = 1; 129168404Spjd auio.uio_resid = len; 130169170Spjd auio.uio_segflg = UIO_SYSSPACE; 131168404Spjd auio.uio_rw = UIO_WRITE; 132168404Spjd auio.uio_offset = (off_t)-1; 133235222Smm auio.uio_td = dsp->dsa_td; 134168404Spjd#ifdef _KERNEL 135235222Smm if (dsp->dsa_fp->f_type == DTYPE_VNODE) 136168404Spjd bwillwrite(); 137235222Smm dsp->dsa_err = fo_write(dsp->dsa_fp, &auio, dsp->dsa_td->td_ucred, 0, 138235222Smm dsp->dsa_td); 139168404Spjd#else 140168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 141235222Smm dsp->dsa_err = EOPNOTSUPP; 142168404Spjd#endif 143235222Smm mutex_enter(&ds->ds_sendstream_lock); 144235222Smm *dsp->dsa_off += len; 145235222Smm mutex_exit(&ds->ds_sendstream_lock); 146235222Smm 147235222Smm return (dsp->dsa_err); 148168404Spjd} 149168404Spjd 150286587Smav/* 151286587Smav * For all record types except BEGIN, fill in the checksum (overlaid in 152286587Smav * drr_u.drr_checksum.drr_checksum). The checksum verifies everything 153286587Smav * up to the start of the checksum itself. 154286587Smav */ 155168404Spjdstatic int 156286587Smavdump_record(dmu_sendarg_t *dsp, void *payload, int payload_len) 157286587Smav{ 158286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 159286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 160286587Smav fletcher_4_incremental_native(dsp->dsa_drr, 161286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 162286587Smav &dsp->dsa_zc); 163307284Smav if (dsp->dsa_drr->drr_type == DRR_BEGIN) { 164307284Smav dsp->dsa_sent_begin = B_TRUE; 165307284Smav } else { 166286587Smav ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u. 167286587Smav drr_checksum.drr_checksum)); 168286587Smav dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc; 169286587Smav } 170307284Smav if (dsp->dsa_drr->drr_type == DRR_END) { 171307284Smav dsp->dsa_sent_end = B_TRUE; 172307284Smav } 173286587Smav fletcher_4_incremental_native(&dsp->dsa_drr-> 174286587Smav drr_u.drr_checksum.drr_checksum, 175286587Smav sizeof (zio_cksum_t), &dsp->dsa_zc); 176286587Smav if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) 177286587Smav return (SET_ERROR(EINTR)); 178286587Smav if (payload_len != 0) { 179286587Smav fletcher_4_incremental_native(payload, payload_len, 180286587Smav &dsp->dsa_zc); 181286587Smav if (dump_bytes(dsp, payload, payload_len) != 0) 182286587Smav return (SET_ERROR(EINTR)); 183286587Smav } 184286587Smav return (0); 185286587Smav} 186286587Smav 187294815Smav/* 188294815Smav * Fill in the drr_free struct, or perform aggregation if the previous record is 189294815Smav * also a free record, and the two are adjacent. 190294815Smav * 191294815Smav * Note that we send free records even for a full send, because we want to be 192294815Smav * able to receive a full send as a clone, which requires a list of all the free 193294815Smav * and freeobject records that were generated on the source. 194294815Smav */ 195286587Smavstatic int 196235222Smmdump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 197168404Spjd uint64_t length) 198168404Spjd{ 199235222Smm struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); 200219089Spjd 201253821Sdelphij /* 202253821Sdelphij * When we receive a free record, dbuf_free_range() assumes 203253821Sdelphij * that the receiving system doesn't have any dbufs in the range 204253821Sdelphij * being freed. This is always true because there is a one-record 205253821Sdelphij * constraint: we only send one WRITE record for any given 206289362Smav * object,offset. We know that the one-record constraint is 207253821Sdelphij * true because we always send data in increasing order by 208253821Sdelphij * object,offset. 209253821Sdelphij * 210253821Sdelphij * If the increasing-order constraint ever changes, we should find 211253821Sdelphij * another way to assert that the one-record constraint is still 212253821Sdelphij * satisfied. 213253821Sdelphij */ 214253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 215253821Sdelphij (object == dsp->dsa_last_data_object && 216253821Sdelphij offset > dsp->dsa_last_data_offset)); 217253821Sdelphij 218237458Smm if (length != -1ULL && offset + length < offset) 219237458Smm length = -1ULL; 220237458Smm 221219089Spjd /* 222219089Spjd * If there is a pending op, but it's not PENDING_FREE, push it out, 223219089Spjd * since free block aggregation can only be done for blocks of the 224219089Spjd * same type (i.e., DRR_FREE records can only be aggregated with 225219089Spjd * other DRR_FREE records. DRR_FREEOBJECTS records can only be 226219089Spjd * aggregated with other DRR_FREEOBJECTS records. 227219089Spjd */ 228235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 229235222Smm dsp->dsa_pending_op != PENDING_FREE) { 230286587Smav if (dump_record(dsp, NULL, 0) != 0) 231249195Smm return (SET_ERROR(EINTR)); 232235222Smm dsp->dsa_pending_op = PENDING_NONE; 233219089Spjd } 234219089Spjd 235235222Smm if (dsp->dsa_pending_op == PENDING_FREE) { 236219089Spjd /* 237219089Spjd * There should never be a PENDING_FREE if length is -1 238219089Spjd * (because dump_dnode is the only place where this 239219089Spjd * function is called with a -1, and only after flushing 240219089Spjd * any pending record). 241219089Spjd */ 242219089Spjd ASSERT(length != -1ULL); 243219089Spjd /* 244219089Spjd * Check to see whether this free block can be aggregated 245219089Spjd * with pending one. 246219089Spjd */ 247219089Spjd if (drrf->drr_object == object && drrf->drr_offset + 248219089Spjd drrf->drr_length == offset) { 249219089Spjd drrf->drr_length += length; 250219089Spjd return (0); 251219089Spjd } else { 252219089Spjd /* not a continuation. Push out pending record */ 253286587Smav if (dump_record(dsp, NULL, 0) != 0) 254249195Smm return (SET_ERROR(EINTR)); 255235222Smm dsp->dsa_pending_op = PENDING_NONE; 256219089Spjd } 257219089Spjd } 258219089Spjd /* create a FREE record and make it pending */ 259235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 260235222Smm dsp->dsa_drr->drr_type = DRR_FREE; 261219089Spjd drrf->drr_object = object; 262219089Spjd drrf->drr_offset = offset; 263219089Spjd drrf->drr_length = length; 264235222Smm drrf->drr_toguid = dsp->dsa_toguid; 265219089Spjd if (length == -1ULL) { 266286587Smav if (dump_record(dsp, NULL, 0) != 0) 267249195Smm return (SET_ERROR(EINTR)); 268219089Spjd } else { 269235222Smm dsp->dsa_pending_op = PENDING_FREE; 270219089Spjd } 271168404Spjd 272168404Spjd return (0); 273168404Spjd} 274168404Spjd 275168404Spjdstatic int 276268075Sdelphijdump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, 277219089Spjd uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) 278168404Spjd{ 279235222Smm struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); 280219089Spjd 281253821Sdelphij /* 282253821Sdelphij * We send data in increasing object, offset order. 283253821Sdelphij * See comment in dump_free() for details. 284253821Sdelphij */ 285253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 286253821Sdelphij (object == dsp->dsa_last_data_object && 287253821Sdelphij offset > dsp->dsa_last_data_offset)); 288253821Sdelphij dsp->dsa_last_data_object = object; 289253821Sdelphij dsp->dsa_last_data_offset = offset + blksz - 1; 290219089Spjd 291219089Spjd /* 292219089Spjd * If there is any kind of pending aggregation (currently either 293219089Spjd * a grouping of free objects or free blocks), push it out to 294219089Spjd * the stream, since aggregation can't be done across operations 295219089Spjd * of different types. 296219089Spjd */ 297235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 298286587Smav if (dump_record(dsp, NULL, 0) != 0) 299249195Smm return (SET_ERROR(EINTR)); 300235222Smm dsp->dsa_pending_op = PENDING_NONE; 301219089Spjd } 302286587Smav /* write a WRITE record */ 303235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 304235222Smm dsp->dsa_drr->drr_type = DRR_WRITE; 305219089Spjd drrw->drr_object = object; 306219089Spjd drrw->drr_type = type; 307219089Spjd drrw->drr_offset = offset; 308219089Spjd drrw->drr_length = blksz; 309235222Smm drrw->drr_toguid = dsp->dsa_toguid; 310274337Sdelphij if (bp == NULL || BP_IS_EMBEDDED(bp)) { 311268075Sdelphij /* 312274337Sdelphij * There's no pre-computed checksum for partial-block 313274337Sdelphij * writes or embedded BP's, so (like 314274337Sdelphij * fletcher4-checkummed blocks) userland will have to 315274337Sdelphij * compute a dedup-capable checksum itself. 316268075Sdelphij */ 317268075Sdelphij drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; 318268075Sdelphij } else { 319268075Sdelphij drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); 320289422Smav if (zio_checksum_table[drrw->drr_checksumtype].ci_flags & 321289422Smav ZCHECKSUM_FLAG_DEDUP) 322268075Sdelphij drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; 323268075Sdelphij DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); 324268075Sdelphij DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); 325268075Sdelphij DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); 326268075Sdelphij drrw->drr_key.ddk_cksum = bp->blk_cksum; 327268075Sdelphij } 328168404Spjd 329286587Smav if (dump_record(dsp, data, blksz) != 0) 330249195Smm return (SET_ERROR(EINTR)); 331219089Spjd return (0); 332219089Spjd} 333219089Spjd 334219089Spjdstatic int 335268075Sdelphijdump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 336268075Sdelphij int blksz, const blkptr_t *bp) 337268075Sdelphij{ 338268075Sdelphij char buf[BPE_PAYLOAD_SIZE]; 339268075Sdelphij struct drr_write_embedded *drrw = 340268075Sdelphij &(dsp->dsa_drr->drr_u.drr_write_embedded); 341268075Sdelphij 342268075Sdelphij if (dsp->dsa_pending_op != PENDING_NONE) { 343286587Smav if (dump_record(dsp, NULL, 0) != 0) 344268075Sdelphij return (EINTR); 345268075Sdelphij dsp->dsa_pending_op = PENDING_NONE; 346268075Sdelphij } 347268075Sdelphij 348268075Sdelphij ASSERT(BP_IS_EMBEDDED(bp)); 349268075Sdelphij 350268075Sdelphij bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 351268075Sdelphij dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; 352268075Sdelphij drrw->drr_object = object; 353268075Sdelphij drrw->drr_offset = offset; 354268075Sdelphij drrw->drr_length = blksz; 355268075Sdelphij drrw->drr_toguid = dsp->dsa_toguid; 356268075Sdelphij drrw->drr_compression = BP_GET_COMPRESS(bp); 357268075Sdelphij drrw->drr_etype = BPE_GET_ETYPE(bp); 358268075Sdelphij drrw->drr_lsize = BPE_GET_LSIZE(bp); 359268075Sdelphij drrw->drr_psize = BPE_GET_PSIZE(bp); 360268075Sdelphij 361268075Sdelphij decode_embedded_bp_compressed(bp, buf); 362268075Sdelphij 363286587Smav if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) 364268075Sdelphij return (EINTR); 365268075Sdelphij return (0); 366268075Sdelphij} 367268075Sdelphij 368268075Sdelphijstatic int 369235222Smmdump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) 370219089Spjd{ 371235222Smm struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); 372219089Spjd 373235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 374286587Smav if (dump_record(dsp, NULL, 0) != 0) 375249195Smm return (SET_ERROR(EINTR)); 376235222Smm dsp->dsa_pending_op = PENDING_NONE; 377219089Spjd } 378219089Spjd 379219089Spjd /* write a SPILL record */ 380235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 381235222Smm dsp->dsa_drr->drr_type = DRR_SPILL; 382219089Spjd drrs->drr_object = object; 383219089Spjd drrs->drr_length = blksz; 384235222Smm drrs->drr_toguid = dsp->dsa_toguid; 385219089Spjd 386286587Smav if (dump_record(dsp, data, blksz) != 0) 387249195Smm return (SET_ERROR(EINTR)); 388168404Spjd return (0); 389168404Spjd} 390168404Spjd 391168404Spjdstatic int 392235222Smmdump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) 393168404Spjd{ 394235222Smm struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); 395219089Spjd 396219089Spjd /* 397219089Spjd * If there is a pending op, but it's not PENDING_FREEOBJECTS, 398219089Spjd * push it out, since free block aggregation can only be done for 399219089Spjd * blocks of the same type (i.e., DRR_FREE records can only be 400219089Spjd * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records 401219089Spjd * can only be aggregated with other DRR_FREEOBJECTS records. 402219089Spjd */ 403235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 404235222Smm dsp->dsa_pending_op != PENDING_FREEOBJECTS) { 405286587Smav if (dump_record(dsp, NULL, 0) != 0) 406249195Smm return (SET_ERROR(EINTR)); 407235222Smm dsp->dsa_pending_op = PENDING_NONE; 408219089Spjd } 409235222Smm if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { 410219089Spjd /* 411219089Spjd * See whether this free object array can be aggregated 412219089Spjd * with pending one 413219089Spjd */ 414219089Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { 415219089Spjd drrfo->drr_numobjs += numobjs; 416219089Spjd return (0); 417219089Spjd } else { 418219089Spjd /* can't be aggregated. Push out pending record */ 419286587Smav if (dump_record(dsp, NULL, 0) != 0) 420249195Smm return (SET_ERROR(EINTR)); 421235222Smm dsp->dsa_pending_op = PENDING_NONE; 422219089Spjd } 423219089Spjd } 424219089Spjd 425168404Spjd /* write a FREEOBJECTS record */ 426235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 427235222Smm dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; 428219089Spjd drrfo->drr_firstobj = firstobj; 429219089Spjd drrfo->drr_numobjs = numobjs; 430235222Smm drrfo->drr_toguid = dsp->dsa_toguid; 431168404Spjd 432235222Smm dsp->dsa_pending_op = PENDING_FREEOBJECTS; 433219089Spjd 434168404Spjd return (0); 435168404Spjd} 436168404Spjd 437168404Spjdstatic int 438235222Smmdump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) 439168404Spjd{ 440235222Smm struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); 441219089Spjd 442289362Smav if (object < dsp->dsa_resume_object) { 443289362Smav /* 444289362Smav * Note: when resuming, we will visit all the dnodes in 445289362Smav * the block of dnodes that we are resuming from. In 446289362Smav * this case it's unnecessary to send the dnodes prior to 447289362Smav * the one we are resuming from. We should be at most one 448289362Smav * block's worth of dnodes behind the resume point. 449289362Smav */ 450289362Smav ASSERT3U(dsp->dsa_resume_object - object, <, 451289362Smav 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT)); 452289362Smav return (0); 453289362Smav } 454289362Smav 455168404Spjd if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) 456235222Smm return (dump_freeobjects(dsp, object, 1)); 457168404Spjd 458235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 459286587Smav if (dump_record(dsp, NULL, 0) != 0) 460249195Smm return (SET_ERROR(EINTR)); 461235222Smm dsp->dsa_pending_op = PENDING_NONE; 462219089Spjd } 463219089Spjd 464168404Spjd /* write an OBJECT record */ 465235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 466235222Smm dsp->dsa_drr->drr_type = DRR_OBJECT; 467219089Spjd drro->drr_object = object; 468219089Spjd drro->drr_type = dnp->dn_type; 469219089Spjd drro->drr_bonustype = dnp->dn_bonustype; 470219089Spjd drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 471219089Spjd drro->drr_bonuslen = dnp->dn_bonuslen; 472219089Spjd drro->drr_checksumtype = dnp->dn_checksum; 473219089Spjd drro->drr_compress = dnp->dn_compress; 474235222Smm drro->drr_toguid = dsp->dsa_toguid; 475168404Spjd 476274337Sdelphij if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 477274337Sdelphij drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) 478274337Sdelphij drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; 479274337Sdelphij 480286587Smav if (dump_record(dsp, DN_BONUS(dnp), 481286587Smav P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) { 482249195Smm return (SET_ERROR(EINTR)); 483286587Smav } 484168404Spjd 485253821Sdelphij /* Free anything past the end of the file. */ 486235222Smm if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * 487253821Sdelphij (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) 488249195Smm return (SET_ERROR(EINTR)); 489248571Smm if (dsp->dsa_err != 0) 490249195Smm return (SET_ERROR(EINTR)); 491168404Spjd return (0); 492168404Spjd} 493168404Spjd 494268075Sdelphijstatic boolean_t 495268075Sdelphijbackup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) 496268075Sdelphij{ 497268075Sdelphij if (!BP_IS_EMBEDDED(bp)) 498268075Sdelphij return (B_FALSE); 499268075Sdelphij 500268075Sdelphij /* 501268075Sdelphij * Compression function must be legacy, or explicitly enabled. 502268075Sdelphij */ 503268075Sdelphij if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && 504268075Sdelphij !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4))) 505268075Sdelphij return (B_FALSE); 506268075Sdelphij 507268075Sdelphij /* 508268075Sdelphij * Embed type must be explicitly enabled. 509268075Sdelphij */ 510268075Sdelphij switch (BPE_GET_ETYPE(bp)) { 511268075Sdelphij case BP_EMBEDDED_TYPE_DATA: 512268075Sdelphij if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) 513268075Sdelphij return (B_TRUE); 514268075Sdelphij break; 515268075Sdelphij default: 516268075Sdelphij return (B_FALSE); 517268075Sdelphij } 518268075Sdelphij return (B_FALSE); 519268075Sdelphij} 520268075Sdelphij 521286705Smav/* 522286705Smav * This is the callback function to traverse_dataset that acts as the worker 523286705Smav * thread for dmu_send_impl. 524286705Smav */ 525286705Smav/*ARGSUSED*/ 526286705Smavstatic int 527286705Smavsend_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 528286705Smav const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg) 529286705Smav{ 530286705Smav struct send_thread_arg *sta = arg; 531286705Smav struct send_block_record *record; 532286705Smav uint64_t record_size; 533286705Smav int err = 0; 534168404Spjd 535289362Smav ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || 536289362Smav zb->zb_object >= sta->resume.zb_object); 537289362Smav 538286705Smav if (sta->cancel) 539286705Smav return (SET_ERROR(EINTR)); 540286705Smav 541286705Smav if (bp == NULL) { 542286705Smav ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL); 543286705Smav return (0); 544286705Smav } else if (zb->zb_level < 0) { 545286705Smav return (0); 546286705Smav } 547286705Smav 548286705Smav record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP); 549286705Smav record->eos_marker = B_FALSE; 550286705Smav record->bp = *bp; 551286705Smav record->zb = *zb; 552286705Smav record->indblkshift = dnp->dn_indblkshift; 553286705Smav record->datablkszsec = dnp->dn_datablkszsec; 554286705Smav record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 555286705Smav bqueue_enqueue(&sta->q, record, record_size); 556286705Smav 557286705Smav return (err); 558286705Smav} 559286705Smav 560286705Smav/* 561286705Smav * This function kicks off the traverse_dataset. It also handles setting the 562286705Smav * error code of the thread in case something goes wrong, and pushes the End of 563286705Smav * Stream record when the traverse_dataset call has finished. If there is no 564286705Smav * dataset to traverse, the thread immediately pushes End of Stream marker. 565286705Smav */ 566286705Smavstatic void 567286705Smavsend_traverse_thread(void *arg) 568286705Smav{ 569286705Smav struct send_thread_arg *st_arg = arg; 570286705Smav int err; 571286705Smav struct send_block_record *data; 572286705Smav 573286705Smav if (st_arg->ds != NULL) { 574289362Smav err = traverse_dataset_resume(st_arg->ds, 575289362Smav st_arg->fromtxg, &st_arg->resume, 576289362Smav st_arg->flags, send_cb, st_arg); 577289362Smav 578286705Smav if (err != EINTR) 579286705Smav st_arg->error_code = err; 580286705Smav } 581286705Smav data = kmem_zalloc(sizeof (*data), KM_SLEEP); 582286705Smav data->eos_marker = B_TRUE; 583286705Smav bqueue_enqueue(&st_arg->q, data, 1); 584286705Smav thread_exit(); 585286705Smav} 586286705Smav 587286705Smav/* 588286705Smav * This function actually handles figuring out what kind of record needs to be 589286705Smav * dumped, reading the data (which has hopefully been prefetched), and calling 590286705Smav * the appropriate helper function. 591286705Smav */ 592168404Spjdstatic int 593286705Smavdo_dump(dmu_sendarg_t *dsa, struct send_block_record *data) 594168404Spjd{ 595286705Smav dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os); 596286705Smav const blkptr_t *bp = &data->bp; 597286705Smav const zbookmark_phys_t *zb = &data->zb; 598286705Smav uint8_t indblkshift = data->indblkshift; 599286705Smav uint16_t dblkszsec = data->datablkszsec; 600286705Smav spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 601168404Spjd dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; 602168404Spjd int err = 0; 603168404Spjd 604286705Smav ASSERT3U(zb->zb_level, >=, 0); 605168404Spjd 606289362Smav ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || 607289362Smav zb->zb_object >= dsa->dsa_resume_object); 608289362Smav 609219089Spjd if (zb->zb_object != DMU_META_DNODE_OBJECT && 610219089Spjd DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { 611209962Smm return (0); 612260150Sdelphij } else if (BP_IS_HOLE(bp) && 613260150Sdelphij zb->zb_object == DMU_META_DNODE_OBJECT) { 614286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 615208047Smm uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; 616286705Smav err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT); 617260150Sdelphij } else if (BP_IS_HOLE(bp)) { 618286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 619286705Smav uint64_t offset = zb->zb_blkid * span; 620286705Smav err = dump_free(dsa, zb->zb_object, offset, span); 621208047Smm } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { 622208047Smm return (0); 623208047Smm } else if (type == DMU_OT_DNODE) { 624168404Spjd int blksz = BP_GET_LSIZE(bp); 625275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 626208047Smm arc_buf_t *abuf; 627168404Spjd 628286705Smav ASSERT0(zb->zb_level); 629286705Smav 630246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 631246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 632246666Smm &aflags, zb) != 0) 633249195Smm return (SET_ERROR(EIO)); 634208047Smm 635286705Smav dnode_phys_t *blk = abuf->b_data; 636286705Smav uint64_t dnobj = zb->zb_blkid * (blksz >> DNODE_SHIFT); 637286705Smav for (int i = 0; i < blksz >> DNODE_SHIFT; i++) { 638286705Smav err = dump_dnode(dsa, dnobj + i, blk + i); 639248571Smm if (err != 0) 640168404Spjd break; 641168404Spjd } 642307265Smav arc_buf_destroy(abuf, &abuf); 643219089Spjd } else if (type == DMU_OT_SA) { 644275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 645208047Smm arc_buf_t *abuf; 646168404Spjd int blksz = BP_GET_LSIZE(bp); 647168404Spjd 648246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 649246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 650246666Smm &aflags, zb) != 0) 651249195Smm return (SET_ERROR(EIO)); 652168404Spjd 653286705Smav err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data); 654307265Smav arc_buf_destroy(abuf, &abuf); 655286705Smav } else if (backup_do_embed(dsa, bp)) { 656268075Sdelphij /* it's an embedded level-0 block of a regular object */ 657286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 658286705Smav ASSERT0(zb->zb_level); 659286705Smav err = dump_write_embedded(dsa, zb->zb_object, 660268075Sdelphij zb->zb_blkid * blksz, blksz, bp); 661286705Smav } else { 662286705Smav /* it's a level-0 block of a regular object */ 663275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 664219089Spjd arc_buf_t *abuf; 665286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 666274337Sdelphij uint64_t offset; 667219089Spjd 668260183Sdelphij ASSERT0(zb->zb_level); 669289362Smav ASSERT(zb->zb_object > dsa->dsa_resume_object || 670289362Smav (zb->zb_object == dsa->dsa_resume_object && 671289362Smav zb->zb_blkid * blksz >= dsa->dsa_resume_offset)); 672289362Smav 673246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 674246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 675246666Smm &aflags, zb) != 0) { 676228103Smm if (zfs_send_corrupt_data) { 677228103Smm /* Send a block filled with 0x"zfs badd bloc" */ 678307265Smav abuf = arc_alloc_buf(spa, blksz, &abuf, 679228103Smm ARC_BUFC_DATA); 680228103Smm uint64_t *ptr; 681228103Smm for (ptr = abuf->b_data; 682228103Smm (char *)ptr < (char *)abuf->b_data + blksz; 683228103Smm ptr++) 684286554Smav *ptr = 0x2f5baddb10cULL; 685228103Smm } else { 686249195Smm return (SET_ERROR(EIO)); 687228103Smm } 688228103Smm } 689219089Spjd 690274337Sdelphij offset = zb->zb_blkid * blksz; 691274337Sdelphij 692286705Smav if (!(dsa->dsa_featureflags & 693274337Sdelphij DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 694274337Sdelphij blksz > SPA_OLD_MAXBLOCKSIZE) { 695274337Sdelphij char *buf = abuf->b_data; 696274337Sdelphij while (blksz > 0 && err == 0) { 697274337Sdelphij int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); 698286705Smav err = dump_write(dsa, type, zb->zb_object, 699274337Sdelphij offset, n, NULL, buf); 700274337Sdelphij offset += n; 701274337Sdelphij buf += n; 702274337Sdelphij blksz -= n; 703274337Sdelphij } 704274337Sdelphij } else { 705286705Smav err = dump_write(dsa, type, zb->zb_object, 706274337Sdelphij offset, blksz, bp, abuf->b_data); 707274337Sdelphij } 708307265Smav arc_buf_destroy(abuf, &abuf); 709168404Spjd } 710168404Spjd 711168404Spjd ASSERT(err == 0 || err == EINTR); 712168404Spjd return (err); 713168404Spjd} 714168404Spjd 715248571Smm/* 716286705Smav * Pop the new data off the queue, and free the old data. 717248571Smm */ 718286705Smavstatic struct send_block_record * 719286705Smavget_next_record(bqueue_t *bq, struct send_block_record *data) 720286705Smav{ 721286705Smav struct send_block_record *tmp = bqueue_dequeue(bq); 722286705Smav kmem_free(data, sizeof (*data)); 723286705Smav return (tmp); 724286705Smav} 725286705Smav 726286705Smav/* 727286705Smav * Actually do the bulk of the work in a zfs send. 728286705Smav * 729286705Smav * Note: Releases dp using the specified tag. 730286705Smav */ 731248571Smmstatic int 732286705Smavdmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, 733289362Smav zfs_bookmark_phys_t *ancestor_zb, 734289362Smav boolean_t is_clone, boolean_t embedok, boolean_t large_block_ok, int outfd, 735289362Smav uint64_t resumeobj, uint64_t resumeoff, 736248571Smm#ifdef illumos 737289362Smav vnode_t *vp, offset_t *off) 738248571Smm#else 739289362Smav struct file *fp, offset_t *off) 740248571Smm#endif 741168404Spjd{ 742248571Smm objset_t *os; 743168404Spjd dmu_replay_record_t *drr; 744235222Smm dmu_sendarg_t *dsp; 745168404Spjd int err; 746185029Spjd uint64_t fromtxg = 0; 747268075Sdelphij uint64_t featureflags = 0; 748289362Smav struct send_thread_arg to_arg = { 0 }; 749168404Spjd 750286705Smav err = dmu_objset_from_ds(to_ds, &os); 751248571Smm if (err != 0) { 752248571Smm dsl_pool_rele(dp, tag); 753248571Smm return (err); 754185029Spjd } 755185029Spjd 756168404Spjd drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); 757168404Spjd drr->drr_type = DRR_BEGIN; 758168404Spjd drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; 759219089Spjd DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, 760219089Spjd DMU_SUBSTREAM); 761219089Spjd 762219089Spjd#ifdef _KERNEL 763248571Smm if (dmu_objset_type(os) == DMU_OST_ZFS) { 764219089Spjd uint64_t version; 765248571Smm if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { 766235222Smm kmem_free(drr, sizeof (dmu_replay_record_t)); 767248571Smm dsl_pool_rele(dp, tag); 768249195Smm return (SET_ERROR(EINVAL)); 769235222Smm } 770248571Smm if (version >= ZPL_VERSION_SA) { 771268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; 772219089Spjd } 773219089Spjd } 774219089Spjd#endif 775219089Spjd 776286708Smav if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) 777274337Sdelphij featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; 778268075Sdelphij if (embedok && 779268075Sdelphij spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { 780268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; 781268075Sdelphij if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 782268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; 783268075Sdelphij } 784268075Sdelphij 785289362Smav if (resumeobj != 0 || resumeoff != 0) { 786289362Smav featureflags |= DMU_BACKUP_FEATURE_RESUMING; 787289362Smav } 788289362Smav 789268075Sdelphij DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, 790268075Sdelphij featureflags); 791268075Sdelphij 792168404Spjd drr->drr_u.drr_begin.drr_creation_time = 793286705Smav dsl_dataset_phys(to_ds)->ds_creation_time; 794248571Smm drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); 795260183Sdelphij if (is_clone) 796185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; 797286705Smav drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid; 798286705Smav if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET) 799185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; 800296516Smav if (zfs_send_set_freerecords_bit) 801296516Smav drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_FREERECORDS; 802185029Spjd 803286705Smav if (ancestor_zb != NULL) { 804286705Smav drr->drr_u.drr_begin.drr_fromguid = 805286705Smav ancestor_zb->zbm_guid; 806286705Smav fromtxg = ancestor_zb->zbm_creation_txg; 807260183Sdelphij } 808286705Smav dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname); 809286705Smav if (!to_ds->ds_is_snapshot) { 810260183Sdelphij (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", 811260183Sdelphij sizeof (drr->drr_u.drr_begin.drr_toname)); 812248571Smm } 813185029Spjd 814235222Smm dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); 815168404Spjd 816235222Smm dsp->dsa_drr = drr; 817235222Smm dsp->dsa_outfd = outfd; 818235222Smm dsp->dsa_proc = curproc; 819235222Smm dsp->dsa_td = curthread; 820235222Smm dsp->dsa_fp = fp; 821248571Smm dsp->dsa_os = os; 822235222Smm dsp->dsa_off = off; 823286705Smav dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid; 824235222Smm dsp->dsa_pending_op = PENDING_NONE; 825268075Sdelphij dsp->dsa_featureflags = featureflags; 826289362Smav dsp->dsa_resume_object = resumeobj; 827289362Smav dsp->dsa_resume_offset = resumeoff; 828235222Smm 829286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 830286705Smav list_insert_head(&to_ds->ds_sendstreams, dsp); 831286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 832235222Smm 833286705Smav dsl_dataset_long_hold(to_ds, FTAG); 834249042Smm dsl_pool_rele(dp, tag); 835249042Smm 836289362Smav void *payload = NULL; 837289362Smav size_t payload_len = 0; 838289362Smav if (resumeobj != 0 || resumeoff != 0) { 839289362Smav dmu_object_info_t to_doi; 840289362Smav err = dmu_object_info(os, resumeobj, &to_doi); 841289362Smav if (err != 0) 842289362Smav goto out; 843289362Smav SET_BOOKMARK(&to_arg.resume, to_ds->ds_object, resumeobj, 0, 844289362Smav resumeoff / to_doi.doi_data_block_size); 845289362Smav 846289362Smav nvlist_t *nvl = fnvlist_alloc(); 847289362Smav fnvlist_add_uint64(nvl, "resume_object", resumeobj); 848289362Smav fnvlist_add_uint64(nvl, "resume_offset", resumeoff); 849289362Smav payload = fnvlist_pack(nvl, &payload_len); 850289362Smav drr->drr_payloadlen = payload_len; 851289362Smav fnvlist_free(nvl); 852289362Smav } 853289362Smav 854289362Smav err = dump_record(dsp, payload, payload_len); 855289362Smav fnvlist_pack_free(payload, payload_len); 856289362Smav if (err != 0) { 857235222Smm err = dsp->dsa_err; 858235222Smm goto out; 859168404Spjd } 860168404Spjd 861286705Smav err = bqueue_init(&to_arg.q, zfs_send_queue_length, 862286705Smav offsetof(struct send_block_record, ln)); 863286705Smav to_arg.error_code = 0; 864286705Smav to_arg.cancel = B_FALSE; 865286705Smav to_arg.ds = to_ds; 866286705Smav to_arg.fromtxg = fromtxg; 867286705Smav to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH; 868287280Sdelphij (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, &p0, 869286705Smav TS_RUN, minclsyspri); 870168404Spjd 871286705Smav struct send_block_record *to_data; 872286705Smav to_data = bqueue_dequeue(&to_arg.q); 873286705Smav 874286705Smav while (!to_data->eos_marker && err == 0) { 875286705Smav err = do_dump(dsp, to_data); 876286705Smav to_data = get_next_record(&to_arg.q, to_data); 877286705Smav if (issig(JUSTLOOKING) && issig(FORREAL)) 878286705Smav err = EINTR; 879286705Smav } 880286705Smav 881286705Smav if (err != 0) { 882286705Smav to_arg.cancel = B_TRUE; 883286705Smav while (!to_data->eos_marker) { 884286705Smav to_data = get_next_record(&to_arg.q, to_data); 885286705Smav } 886286705Smav } 887286705Smav kmem_free(to_data, sizeof (*to_data)); 888286705Smav 889286705Smav bqueue_destroy(&to_arg.q); 890286705Smav 891286705Smav if (err == 0 && to_arg.error_code != 0) 892286705Smav err = to_arg.error_code; 893286705Smav 894286705Smav if (err != 0) 895286705Smav goto out; 896286705Smav 897235222Smm if (dsp->dsa_pending_op != PENDING_NONE) 898286587Smav if (dump_record(dsp, NULL, 0) != 0) 899249195Smm err = SET_ERROR(EINTR); 900219089Spjd 901248571Smm if (err != 0) { 902248571Smm if (err == EINTR && dsp->dsa_err != 0) 903235222Smm err = dsp->dsa_err; 904235222Smm goto out; 905168404Spjd } 906168404Spjd 907168404Spjd bzero(drr, sizeof (dmu_replay_record_t)); 908168404Spjd drr->drr_type = DRR_END; 909235222Smm drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; 910235222Smm drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; 911168404Spjd 912286705Smav if (dump_record(dsp, NULL, 0) != 0) 913235222Smm err = dsp->dsa_err; 914168404Spjd 915235222Smmout: 916286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 917286705Smav list_remove(&to_ds->ds_sendstreams, dsp); 918286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 919235222Smm 920307284Smav VERIFY(err != 0 || (dsp->dsa_sent_begin && dsp->dsa_sent_end)); 921307284Smav 922168404Spjd kmem_free(drr, sizeof (dmu_replay_record_t)); 923235222Smm kmem_free(dsp, sizeof (dmu_sendarg_t)); 924168404Spjd 925286705Smav dsl_dataset_long_rele(to_ds, FTAG); 926248571Smm 927235222Smm return (err); 928168404Spjd} 929168404Spjd 930228103Smmint 931248571Smmdmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, 932274337Sdelphij boolean_t embedok, boolean_t large_block_ok, 933248571Smm#ifdef illumos 934274337Sdelphij int outfd, vnode_t *vp, offset_t *off) 935248571Smm#else 936274337Sdelphij int outfd, struct file *fp, offset_t *off) 937248571Smm#endif 938228103Smm{ 939248571Smm dsl_pool_t *dp; 940248571Smm dsl_dataset_t *ds; 941248571Smm dsl_dataset_t *fromds = NULL; 942248571Smm int err; 943248571Smm 944248571Smm err = dsl_pool_hold(pool, FTAG, &dp); 945248571Smm if (err != 0) 946248571Smm return (err); 947248571Smm 948248571Smm err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); 949248571Smm if (err != 0) { 950248571Smm dsl_pool_rele(dp, FTAG); 951248571Smm return (err); 952248571Smm } 953248571Smm 954248571Smm if (fromsnap != 0) { 955260183Sdelphij zfs_bookmark_phys_t zb; 956260183Sdelphij boolean_t is_clone; 957260183Sdelphij 958248571Smm err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); 959248571Smm if (err != 0) { 960248571Smm dsl_dataset_rele(ds, FTAG); 961248571Smm dsl_pool_rele(dp, FTAG); 962248571Smm return (err); 963248571Smm } 964260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 965260183Sdelphij err = SET_ERROR(EXDEV); 966275782Sdelphij zb.zbm_creation_time = 967275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 968275782Sdelphij zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; 969275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 970260183Sdelphij is_clone = (fromds->ds_dir != ds->ds_dir); 971260183Sdelphij dsl_dataset_rele(fromds, FTAG); 972274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 973289362Smav embedok, large_block_ok, outfd, 0, 0, fp, off); 974260183Sdelphij } else { 975274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 976289362Smav embedok, large_block_ok, outfd, 0, 0, fp, off); 977248571Smm } 978260183Sdelphij dsl_dataset_rele(ds, FTAG); 979260183Sdelphij return (err); 980248571Smm} 981248571Smm 982248571Smmint 983289362Smavdmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok, 984289362Smav boolean_t large_block_ok, int outfd, uint64_t resumeobj, uint64_t resumeoff, 985248571Smm#ifdef illumos 986289362Smav vnode_t *vp, offset_t *off) 987248571Smm#else 988289362Smav struct file *fp, offset_t *off) 989248571Smm#endif 990248571Smm{ 991248571Smm dsl_pool_t *dp; 992248571Smm dsl_dataset_t *ds; 993248571Smm int err; 994260183Sdelphij boolean_t owned = B_FALSE; 995248571Smm 996260183Sdelphij if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) 997249195Smm return (SET_ERROR(EINVAL)); 998248571Smm 999248571Smm err = dsl_pool_hold(tosnap, FTAG, &dp); 1000248571Smm if (err != 0) 1001248571Smm return (err); 1002248571Smm 1003260183Sdelphij if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { 1004260183Sdelphij /* 1005260183Sdelphij * We are sending a filesystem or volume. Ensure 1006260183Sdelphij * that it doesn't change by owning the dataset. 1007260183Sdelphij */ 1008260183Sdelphij err = dsl_dataset_own(dp, tosnap, FTAG, &ds); 1009260183Sdelphij owned = B_TRUE; 1010260183Sdelphij } else { 1011260183Sdelphij err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); 1012260183Sdelphij } 1013248571Smm if (err != 0) { 1014248571Smm dsl_pool_rele(dp, FTAG); 1015248571Smm return (err); 1016248571Smm } 1017248571Smm 1018248571Smm if (fromsnap != NULL) { 1019260183Sdelphij zfs_bookmark_phys_t zb; 1020260183Sdelphij boolean_t is_clone = B_FALSE; 1021260183Sdelphij int fsnamelen = strchr(tosnap, '@') - tosnap; 1022260183Sdelphij 1023260183Sdelphij /* 1024260183Sdelphij * If the fromsnap is in a different filesystem, then 1025260183Sdelphij * mark the send stream as a clone. 1026260183Sdelphij */ 1027260183Sdelphij if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || 1028260183Sdelphij (fromsnap[fsnamelen] != '@' && 1029260183Sdelphij fromsnap[fsnamelen] != '#')) { 1030260183Sdelphij is_clone = B_TRUE; 1031260183Sdelphij } 1032260183Sdelphij 1033260183Sdelphij if (strchr(fromsnap, '@')) { 1034260183Sdelphij dsl_dataset_t *fromds; 1035260183Sdelphij err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); 1036260183Sdelphij if (err == 0) { 1037260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 1038260183Sdelphij err = SET_ERROR(EXDEV); 1039260183Sdelphij zb.zbm_creation_time = 1040275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 1041260183Sdelphij zb.zbm_creation_txg = 1042275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_txg; 1043275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 1044260183Sdelphij is_clone = (ds->ds_dir != fromds->ds_dir); 1045260183Sdelphij dsl_dataset_rele(fromds, FTAG); 1046260183Sdelphij } 1047260183Sdelphij } else { 1048260183Sdelphij err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); 1049260183Sdelphij } 1050248571Smm if (err != 0) { 1051248571Smm dsl_dataset_rele(ds, FTAG); 1052248571Smm dsl_pool_rele(dp, FTAG); 1053248571Smm return (err); 1054248571Smm } 1055274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 1056289362Smav embedok, large_block_ok, 1057289362Smav outfd, resumeobj, resumeoff, fp, off); 1058260183Sdelphij } else { 1059274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 1060289362Smav embedok, large_block_ok, 1061289362Smav outfd, resumeobj, resumeoff, fp, off); 1062248571Smm } 1063260183Sdelphij if (owned) 1064260183Sdelphij dsl_dataset_disown(ds, FTAG); 1065260183Sdelphij else 1066260183Sdelphij dsl_dataset_rele(ds, FTAG); 1067260183Sdelphij return (err); 1068248571Smm} 1069248571Smm 1070286683Smavstatic int 1071286683Smavdmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t size, 1072286683Smav uint64_t *sizep) 1073286683Smav{ 1074286683Smav int err; 1075286683Smav /* 1076286683Smav * Assume that space (both on-disk and in-stream) is dominated by 1077286683Smav * data. We will adjust for indirect blocks and the copies property, 1078286683Smav * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). 1079286683Smav */ 1080286683Smav 1081286683Smav /* 1082286683Smav * Subtract out approximate space used by indirect blocks. 1083286683Smav * Assume most space is used by data blocks (non-indirect, non-dnode). 1084286683Smav * Assume all blocks are recordsize. Assume ditto blocks and 1085286683Smav * internal fragmentation counter out compression. 1086286683Smav * 1087286683Smav * Therefore, space used by indirect blocks is sizeof(blkptr_t) per 1088286683Smav * block, which we observe in practice. 1089286683Smav */ 1090286683Smav uint64_t recordsize; 1091286683Smav err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); 1092286683Smav if (err != 0) 1093286683Smav return (err); 1094286683Smav size -= size / recordsize * sizeof (blkptr_t); 1095286683Smav 1096286683Smav /* Add in the space for the record associated with each block. */ 1097286683Smav size += size / recordsize * sizeof (dmu_replay_record_t); 1098286683Smav 1099286683Smav *sizep = size; 1100286683Smav 1101286683Smav return (0); 1102286683Smav} 1103286683Smav 1104248571Smmint 1105248571Smmdmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) 1106248571Smm{ 1107228103Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1108228103Smm int err; 1109228103Smm uint64_t size; 1110228103Smm 1111248571Smm ASSERT(dsl_pool_config_held(dp)); 1112248571Smm 1113228103Smm /* tosnap must be a snapshot */ 1114286575Smav if (!ds->ds_is_snapshot) 1115249195Smm return (SET_ERROR(EINVAL)); 1116228103Smm 1117284301Savg /* fromsnap, if provided, must be a snapshot */ 1118286575Smav if (fromds != NULL && !fromds->ds_is_snapshot) 1119284301Savg return (SET_ERROR(EINVAL)); 1120284301Savg 1121248571Smm /* 1122248571Smm * fromsnap must be an earlier snapshot from the same fs as tosnap, 1123248571Smm * or the origin's fs. 1124248571Smm */ 1125260183Sdelphij if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) 1126249195Smm return (SET_ERROR(EXDEV)); 1127228103Smm 1128228103Smm /* Get uncompressed size estimate of changed data. */ 1129228103Smm if (fromds == NULL) { 1130275782Sdelphij size = dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1131228103Smm } else { 1132228103Smm uint64_t used, comp; 1133228103Smm err = dsl_dataset_space_written(fromds, ds, 1134228103Smm &used, &comp, &size); 1135248571Smm if (err != 0) 1136228103Smm return (err); 1137228103Smm } 1138228103Smm 1139286683Smav err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); 1140286683Smav return (err); 1141286683Smav} 1142228103Smm 1143286683Smav/* 1144286683Smav * Simple callback used to traverse the blocks of a snapshot and sum their 1145286683Smav * uncompressed size 1146286683Smav */ 1147286683Smav/* ARGSUSED */ 1148286683Smavstatic int 1149286683Smavdmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1150286683Smav const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1151286683Smav{ 1152286683Smav uint64_t *spaceptr = arg; 1153286683Smav if (bp != NULL && !BP_IS_HOLE(bp)) { 1154286683Smav *spaceptr += BP_GET_UCSIZE(bp); 1155286683Smav } 1156286683Smav return (0); 1157286683Smav} 1158286683Smav 1159286683Smav/* 1160286683Smav * Given a desination snapshot and a TXG, calculate the approximate size of a 1161286683Smav * send stream sent from that TXG. from_txg may be zero, indicating that the 1162286683Smav * whole snapshot will be sent. 1163286683Smav */ 1164286683Smavint 1165286683Smavdmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, 1166286683Smav uint64_t *sizep) 1167286683Smav{ 1168286683Smav dsl_pool_t *dp = ds->ds_dir->dd_pool; 1169286683Smav int err; 1170286683Smav uint64_t size = 0; 1171286683Smav 1172286683Smav ASSERT(dsl_pool_config_held(dp)); 1173286683Smav 1174286683Smav /* tosnap must be a snapshot */ 1175286683Smav if (!dsl_dataset_is_snapshot(ds)) 1176286683Smav return (SET_ERROR(EINVAL)); 1177286683Smav 1178286683Smav /* verify that from_txg is before the provided snapshot was taken */ 1179286683Smav if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { 1180286683Smav return (SET_ERROR(EXDEV)); 1181286683Smav } 1182286683Smav 1183228103Smm /* 1184286683Smav * traverse the blocks of the snapshot with birth times after 1185286683Smav * from_txg, summing their uncompressed size 1186228103Smm */ 1187286683Smav err = traverse_dataset(ds, from_txg, TRAVERSE_POST, 1188286683Smav dmu_calculate_send_traversal, &size); 1189286683Smav if (err) 1190228103Smm return (err); 1191228103Smm 1192286683Smav err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); 1193286683Smav return (err); 1194228103Smm} 1195228103Smm 1196248571Smmtypedef struct dmu_recv_begin_arg { 1197248571Smm const char *drba_origin; 1198248571Smm dmu_recv_cookie_t *drba_cookie; 1199248571Smm cred_t *drba_cred; 1200253820Sdelphij uint64_t drba_snapobj; 1201248571Smm} dmu_recv_begin_arg_t; 1202168404Spjd 1203168404Spjdstatic int 1204248571Smmrecv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, 1205248571Smm uint64_t fromguid) 1206168404Spjd{ 1207185029Spjd uint64_t val; 1208248571Smm int error; 1209248571Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1210185029Spjd 1211248571Smm /* temporary clone name must not exist */ 1212248571Smm error = zap_lookup(dp->dp_meta_objset, 1213275782Sdelphij dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, 1214248571Smm 8, 1, &val); 1215248571Smm if (error != ENOENT) 1216248571Smm return (error == 0 ? EBUSY : error); 1217248571Smm 1218219089Spjd /* new snapshot name must not exist */ 1219248571Smm error = zap_lookup(dp->dp_meta_objset, 1220275782Sdelphij dsl_dataset_phys(ds)->ds_snapnames_zapobj, 1221275782Sdelphij drba->drba_cookie->drc_tosnap, 8, 1, &val); 1222248571Smm if (error != ENOENT) 1223248571Smm return (error == 0 ? EEXIST : error); 1224168404Spjd 1225264835Sdelphij /* 1226264835Sdelphij * Check snapshot limit before receiving. We'll recheck again at the 1227264835Sdelphij * end, but might as well abort before receiving if we're already over 1228264835Sdelphij * the limit. 1229264835Sdelphij * 1230264835Sdelphij * Note that we do not check the file system limit with 1231264835Sdelphij * dsl_dir_fscount_check because the temporary %clones don't count 1232264835Sdelphij * against that limit. 1233264835Sdelphij */ 1234264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, 1235264835Sdelphij NULL, drba->drba_cred); 1236264835Sdelphij if (error != 0) 1237264835Sdelphij return (error); 1238264835Sdelphij 1239248571Smm if (fromguid != 0) { 1240253820Sdelphij dsl_dataset_t *snap; 1241275782Sdelphij uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1242253820Sdelphij 1243253820Sdelphij /* Find snapshot in this dir that matches fromguid. */ 1244253820Sdelphij while (obj != 0) { 1245253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 1246253820Sdelphij &snap); 1247253820Sdelphij if (error != 0) 1248253820Sdelphij return (SET_ERROR(ENODEV)); 1249253820Sdelphij if (snap->ds_dir != ds->ds_dir) { 1250253820Sdelphij dsl_dataset_rele(snap, FTAG); 1251253820Sdelphij return (SET_ERROR(ENODEV)); 1252253820Sdelphij } 1253275782Sdelphij if (dsl_dataset_phys(snap)->ds_guid == fromguid) 1254253820Sdelphij break; 1255275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 1256253820Sdelphij dsl_dataset_rele(snap, FTAG); 1257253820Sdelphij } 1258253820Sdelphij if (obj == 0) 1259249195Smm return (SET_ERROR(ENODEV)); 1260168404Spjd 1261253820Sdelphij if (drba->drba_cookie->drc_force) { 1262253820Sdelphij drba->drba_snapobj = obj; 1263253820Sdelphij } else { 1264253820Sdelphij /* 1265253820Sdelphij * If we are not forcing, there must be no 1266253820Sdelphij * changes since fromsnap. 1267253820Sdelphij */ 1268253820Sdelphij if (dsl_dataset_modified_since_snap(ds, snap)) { 1269219089Spjd dsl_dataset_rele(snap, FTAG); 1270253820Sdelphij return (SET_ERROR(ETXTBSY)); 1271219089Spjd } 1272253820Sdelphij drba->drba_snapobj = ds->ds_prev->ds_object; 1273219089Spjd } 1274253820Sdelphij 1275253820Sdelphij dsl_dataset_rele(snap, FTAG); 1276219089Spjd } else { 1277283525Savg /* if full, then must be forced */ 1278283525Savg if (!drba->drba_cookie->drc_force) 1279283525Savg return (SET_ERROR(EEXIST)); 1280283525Savg /* start from $ORIGIN@$ORIGIN, if supported */ 1281283525Savg drba->drba_snapobj = dp->dp_origin_snap != NULL ? 1282283525Savg dp->dp_origin_snap->ds_object : 0; 1283219089Spjd } 1284219089Spjd 1285248571Smm return (0); 1286168404Spjd 1287168404Spjd} 1288168404Spjd 1289248571Smmstatic int 1290248571Smmdmu_recv_begin_check(void *arg, dmu_tx_t *tx) 1291248571Smm{ 1292248571Smm dmu_recv_begin_arg_t *drba = arg; 1293248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1294248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1295248571Smm uint64_t fromguid = drrb->drr_fromguid; 1296248571Smm int flags = drrb->drr_flags; 1297248571Smm int error; 1298268075Sdelphij uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1299248571Smm dsl_dataset_t *ds; 1300248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1301248571Smm 1302248571Smm /* already checked */ 1303248571Smm ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1304289362Smav ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING)); 1305248571Smm 1306248571Smm if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1307248571Smm DMU_COMPOUNDSTREAM || 1308248571Smm drrb->drr_type >= DMU_OST_NUMTYPES || 1309248571Smm ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) 1310249195Smm return (SET_ERROR(EINVAL)); 1311248571Smm 1312248571Smm /* Verify pool version supports SA if SA_SPILL feature set */ 1313268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1314268075Sdelphij spa_version(dp->dp_spa) < SPA_VERSION_SA) 1315249195Smm return (SET_ERROR(ENOTSUP)); 1316248571Smm 1317289362Smav if (drba->drba_cookie->drc_resumable && 1318289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET)) 1319289362Smav return (SET_ERROR(ENOTSUP)); 1320289362Smav 1321268075Sdelphij /* 1322268075Sdelphij * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1323268075Sdelphij * record to a plan WRITE record, so the pool must have the 1324268075Sdelphij * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1325268075Sdelphij * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1326268075Sdelphij */ 1327268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1328268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1329268075Sdelphij return (SET_ERROR(ENOTSUP)); 1330268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && 1331268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1332268075Sdelphij return (SET_ERROR(ENOTSUP)); 1333268075Sdelphij 1334274337Sdelphij /* 1335274337Sdelphij * The receiving code doesn't know how to translate large blocks 1336274337Sdelphij * to smaller ones, so the pool must have the LARGE_BLOCKS 1337274337Sdelphij * feature enabled if the stream has LARGE_BLOCKS. 1338274337Sdelphij */ 1339274337Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 1340274337Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) 1341274337Sdelphij return (SET_ERROR(ENOTSUP)); 1342274337Sdelphij 1343248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1344248571Smm if (error == 0) { 1345248571Smm /* target fs already exists; recv into temp clone */ 1346248571Smm 1347248571Smm /* Can't recv a clone into an existing fs */ 1348294815Smav if (flags & DRR_FLAG_CLONE || drba->drba_origin) { 1349248571Smm dsl_dataset_rele(ds, FTAG); 1350249195Smm return (SET_ERROR(EINVAL)); 1351248571Smm } 1352248571Smm 1353248571Smm error = recv_begin_check_existing_impl(drba, ds, fromguid); 1354248571Smm dsl_dataset_rele(ds, FTAG); 1355248571Smm } else if (error == ENOENT) { 1356248571Smm /* target fs does not exist; must be a full backup or clone */ 1357307108Smav char buf[ZFS_MAX_DATASET_NAME_LEN]; 1358248571Smm 1359248571Smm /* 1360248571Smm * If it's a non-clone incremental, we are missing the 1361248571Smm * target fs, so fail the recv. 1362248571Smm */ 1363286705Smav if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || 1364286705Smav drba->drba_origin)) 1365249195Smm return (SET_ERROR(ENOENT)); 1366248571Smm 1367294815Smav /* 1368294815Smav * If we're receiving a full send as a clone, and it doesn't 1369294815Smav * contain all the necessary free records and freeobject 1370294815Smav * records, reject it. 1371294815Smav */ 1372294815Smav if (fromguid == 0 && drba->drba_origin && 1373294815Smav !(flags & DRR_FLAG_FREERECORDS)) 1374294815Smav return (SET_ERROR(EINVAL)); 1375294815Smav 1376248571Smm /* Open the parent of tofs */ 1377307108Smav ASSERT3U(strlen(tofs), <, sizeof (buf)); 1378248571Smm (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); 1379248571Smm error = dsl_dataset_hold(dp, buf, FTAG, &ds); 1380248571Smm if (error != 0) 1381248571Smm return (error); 1382248571Smm 1383264835Sdelphij /* 1384264835Sdelphij * Check filesystem and snapshot limits before receiving. We'll 1385264835Sdelphij * recheck snapshot limits again at the end (we create the 1386264835Sdelphij * filesystems and increment those counts during begin_sync). 1387264835Sdelphij */ 1388264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1389264835Sdelphij ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); 1390264835Sdelphij if (error != 0) { 1391264835Sdelphij dsl_dataset_rele(ds, FTAG); 1392264835Sdelphij return (error); 1393264835Sdelphij } 1394264835Sdelphij 1395264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1396264835Sdelphij ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); 1397264835Sdelphij if (error != 0) { 1398264835Sdelphij dsl_dataset_rele(ds, FTAG); 1399264835Sdelphij return (error); 1400264835Sdelphij } 1401264835Sdelphij 1402248571Smm if (drba->drba_origin != NULL) { 1403248571Smm dsl_dataset_t *origin; 1404248571Smm error = dsl_dataset_hold(dp, drba->drba_origin, 1405248571Smm FTAG, &origin); 1406248571Smm if (error != 0) { 1407248571Smm dsl_dataset_rele(ds, FTAG); 1408248571Smm return (error); 1409248571Smm } 1410286575Smav if (!origin->ds_is_snapshot) { 1411248571Smm dsl_dataset_rele(origin, FTAG); 1412248571Smm dsl_dataset_rele(ds, FTAG); 1413249195Smm return (SET_ERROR(EINVAL)); 1414248571Smm } 1415294815Smav if (dsl_dataset_phys(origin)->ds_guid != fromguid && 1416294815Smav fromguid != 0) { 1417248571Smm dsl_dataset_rele(origin, FTAG); 1418248571Smm dsl_dataset_rele(ds, FTAG); 1419249195Smm return (SET_ERROR(ENODEV)); 1420248571Smm } 1421248571Smm dsl_dataset_rele(origin, FTAG); 1422248571Smm } 1423248571Smm dsl_dataset_rele(ds, FTAG); 1424248571Smm error = 0; 1425248571Smm } 1426248571Smm return (error); 1427248571Smm} 1428248571Smm 1429168404Spjdstatic void 1430248571Smmdmu_recv_begin_sync(void *arg, dmu_tx_t *tx) 1431168404Spjd{ 1432248571Smm dmu_recv_begin_arg_t *drba = arg; 1433248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1434289362Smav objset_t *mos = dp->dp_meta_objset; 1435248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1436248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1437248571Smm dsl_dataset_t *ds, *newds; 1438185029Spjd uint64_t dsobj; 1439248571Smm int error; 1440289362Smav uint64_t crflags = 0; 1441168404Spjd 1442289362Smav if (drrb->drr_flags & DRR_FLAG_CI_DATA) 1443289362Smav crflags |= DS_FLAG_CI_DATASET; 1444168404Spjd 1445248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1446248571Smm if (error == 0) { 1447248571Smm /* create temporary clone */ 1448253820Sdelphij dsl_dataset_t *snap = NULL; 1449253820Sdelphij if (drba->drba_snapobj != 0) { 1450253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, 1451253820Sdelphij drba->drba_snapobj, FTAG, &snap)); 1452253820Sdelphij } 1453248571Smm dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, 1454253820Sdelphij snap, crflags, drba->drba_cred, tx); 1455282632Savg if (drba->drba_snapobj != 0) 1456282632Savg dsl_dataset_rele(snap, FTAG); 1457248571Smm dsl_dataset_rele(ds, FTAG); 1458248571Smm } else { 1459248571Smm dsl_dir_t *dd; 1460248571Smm const char *tail; 1461248571Smm dsl_dataset_t *origin = NULL; 1462248571Smm 1463248571Smm VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); 1464248571Smm 1465248571Smm if (drba->drba_origin != NULL) { 1466248571Smm VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, 1467248571Smm FTAG, &origin)); 1468248571Smm } 1469248571Smm 1470248571Smm /* Create new dataset. */ 1471248571Smm dsobj = dsl_dataset_create_sync(dd, 1472248571Smm strrchr(tofs, '/') + 1, 1473248571Smm origin, crflags, drba->drba_cred, tx); 1474248571Smm if (origin != NULL) 1475248571Smm dsl_dataset_rele(origin, FTAG); 1476248571Smm dsl_dir_rele(dd, FTAG); 1477248571Smm drba->drba_cookie->drc_newfs = B_TRUE; 1478248571Smm } 1479248571Smm VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); 1480248571Smm 1481289362Smav if (drba->drba_cookie->drc_resumable) { 1482289362Smav dsl_dataset_zapify(newds, tx); 1483289362Smav if (drrb->drr_fromguid != 0) { 1484289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID, 1485289362Smav 8, 1, &drrb->drr_fromguid, tx)); 1486289362Smav } 1487289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID, 1488289362Smav 8, 1, &drrb->drr_toguid, tx)); 1489289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME, 1490289362Smav 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx)); 1491289362Smav uint64_t one = 1; 1492289362Smav uint64_t zero = 0; 1493289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT, 1494289362Smav 8, 1, &one, tx)); 1495289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET, 1496289362Smav 8, 1, &zero, tx)); 1497289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES, 1498289362Smav 8, 1, &zero, tx)); 1499289362Smav if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & 1500289362Smav DMU_BACKUP_FEATURE_EMBED_DATA) { 1501289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, 1502289362Smav 8, 1, &one, tx)); 1503289362Smav } 1504289362Smav } 1505289362Smav 1506248571Smm dmu_buf_will_dirty(newds->ds_dbuf, tx); 1507275782Sdelphij dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; 1508248571Smm 1509219089Spjd /* 1510219089Spjd * If we actually created a non-clone, we need to create the 1511219089Spjd * objset in our new dataset. 1512219089Spjd */ 1513308082Smav rrw_enter(&newds->ds_bp_rwlock, RW_READER, FTAG); 1514248571Smm if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { 1515219089Spjd (void) dmu_objset_create_impl(dp->dp_spa, 1516248571Smm newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); 1517219089Spjd } 1518308082Smav rrw_exit(&newds->ds_bp_rwlock, FTAG); 1519168404Spjd 1520248571Smm drba->drba_cookie->drc_ds = newds; 1521185029Spjd 1522248571Smm spa_history_log_internal_ds(newds, "receive", tx, ""); 1523168404Spjd} 1524168404Spjd 1525289362Smavstatic int 1526289362Smavdmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx) 1527289362Smav{ 1528289362Smav dmu_recv_begin_arg_t *drba = arg; 1529289362Smav dsl_pool_t *dp = dmu_tx_pool(tx); 1530289362Smav struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1531289362Smav int error; 1532289362Smav uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1533289362Smav dsl_dataset_t *ds; 1534289362Smav const char *tofs = drba->drba_cookie->drc_tofs; 1535289362Smav 1536289362Smav /* already checked */ 1537289362Smav ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1538289362Smav ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING); 1539289362Smav 1540289362Smav if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1541289362Smav DMU_COMPOUNDSTREAM || 1542289362Smav drrb->drr_type >= DMU_OST_NUMTYPES) 1543289362Smav return (SET_ERROR(EINVAL)); 1544289362Smav 1545289362Smav /* Verify pool version supports SA if SA_SPILL feature set */ 1546289362Smav if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1547289362Smav spa_version(dp->dp_spa) < SPA_VERSION_SA) 1548289362Smav return (SET_ERROR(ENOTSUP)); 1549289362Smav 1550289362Smav /* 1551289362Smav * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1552289362Smav * record to a plain WRITE record, so the pool must have the 1553289362Smav * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1554289362Smav * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1555289362Smav */ 1556289362Smav if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1557289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1558289362Smav return (SET_ERROR(ENOTSUP)); 1559289362Smav if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && 1560289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1561289362Smav return (SET_ERROR(ENOTSUP)); 1562289362Smav 1563307108Smav /* 6 extra bytes for /%recv */ 1564307108Smav char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 1565289362Smav 1566289362Smav (void) snprintf(recvname, sizeof (recvname), "%s/%s", 1567289362Smav tofs, recv_clone_name); 1568289362Smav 1569289362Smav if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { 1570289362Smav /* %recv does not exist; continue in tofs */ 1571289362Smav error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1572289362Smav if (error != 0) 1573289362Smav return (error); 1574289362Smav } 1575289362Smav 1576289362Smav /* check that ds is marked inconsistent */ 1577289362Smav if (!DS_IS_INCONSISTENT(ds)) { 1578289362Smav dsl_dataset_rele(ds, FTAG); 1579289362Smav return (SET_ERROR(EINVAL)); 1580289362Smav } 1581289362Smav 1582289362Smav /* check that there is resuming data, and that the toguid matches */ 1583289362Smav if (!dsl_dataset_is_zapified(ds)) { 1584289362Smav dsl_dataset_rele(ds, FTAG); 1585289362Smav return (SET_ERROR(EINVAL)); 1586289362Smav } 1587289362Smav uint64_t val; 1588289362Smav error = zap_lookup(dp->dp_meta_objset, ds->ds_object, 1589289362Smav DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val); 1590289362Smav if (error != 0 || drrb->drr_toguid != val) { 1591289362Smav dsl_dataset_rele(ds, FTAG); 1592289362Smav return (SET_ERROR(EINVAL)); 1593289362Smav } 1594289362Smav 1595289362Smav /* 1596289362Smav * Check if the receive is still running. If so, it will be owned. 1597289362Smav * Note that nothing else can own the dataset (e.g. after the receive 1598289362Smav * fails) because it will be marked inconsistent. 1599289362Smav */ 1600289362Smav if (dsl_dataset_has_owner(ds)) { 1601289362Smav dsl_dataset_rele(ds, FTAG); 1602289362Smav return (SET_ERROR(EBUSY)); 1603289362Smav } 1604289362Smav 1605289362Smav /* There should not be any snapshots of this fs yet. */ 1606289362Smav if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) { 1607289362Smav dsl_dataset_rele(ds, FTAG); 1608289362Smav return (SET_ERROR(EINVAL)); 1609289362Smav } 1610289362Smav 1611289362Smav /* 1612289362Smav * Note: resume point will be checked when we process the first WRITE 1613289362Smav * record. 1614289362Smav */ 1615289362Smav 1616289362Smav /* check that the origin matches */ 1617289362Smav val = 0; 1618289362Smav (void) zap_lookup(dp->dp_meta_objset, ds->ds_object, 1619289362Smav DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val); 1620289362Smav if (drrb->drr_fromguid != val) { 1621289362Smav dsl_dataset_rele(ds, FTAG); 1622289362Smav return (SET_ERROR(EINVAL)); 1623289362Smav } 1624289362Smav 1625289362Smav dsl_dataset_rele(ds, FTAG); 1626289362Smav return (0); 1627289362Smav} 1628289362Smav 1629289362Smavstatic void 1630289362Smavdmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx) 1631289362Smav{ 1632289362Smav dmu_recv_begin_arg_t *drba = arg; 1633289362Smav dsl_pool_t *dp = dmu_tx_pool(tx); 1634289362Smav const char *tofs = drba->drba_cookie->drc_tofs; 1635289362Smav dsl_dataset_t *ds; 1636289362Smav uint64_t dsobj; 1637307108Smav /* 6 extra bytes for /%recv */ 1638307108Smav char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 1639289362Smav 1640289362Smav (void) snprintf(recvname, sizeof (recvname), "%s/%s", 1641289362Smav tofs, recv_clone_name); 1642289362Smav 1643289362Smav if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { 1644289362Smav /* %recv does not exist; continue in tofs */ 1645289362Smav VERIFY0(dsl_dataset_hold(dp, tofs, FTAG, &ds)); 1646289362Smav drba->drba_cookie->drc_newfs = B_TRUE; 1647289362Smav } 1648289362Smav 1649289362Smav /* clear the inconsistent flag so that we can own it */ 1650289362Smav ASSERT(DS_IS_INCONSISTENT(ds)); 1651289362Smav dmu_buf_will_dirty(ds->ds_dbuf, tx); 1652289362Smav dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 1653289362Smav dsobj = ds->ds_object; 1654289362Smav dsl_dataset_rele(ds, FTAG); 1655289362Smav 1656289362Smav VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &ds)); 1657289362Smav 1658289362Smav dmu_buf_will_dirty(ds->ds_dbuf, tx); 1659289362Smav dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; 1660289362Smav 1661308082Smav rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); 1662289362Smav ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds))); 1663308082Smav rrw_exit(&ds->ds_bp_rwlock, FTAG); 1664289362Smav 1665289362Smav drba->drba_cookie->drc_ds = ds; 1666289362Smav 1667289362Smav spa_history_log_internal_ds(ds, "resume receive", tx, ""); 1668289362Smav} 1669289362Smav 1670185029Spjd/* 1671185029Spjd * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() 1672185029Spjd * succeeds; otherwise we will leak the holds on the datasets. 1673185029Spjd */ 1674185029Spjdint 1675289362Smavdmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, 1676289362Smav boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc) 1677168404Spjd{ 1678248571Smm dmu_recv_begin_arg_t drba = { 0 }; 1679168404Spjd 1680185029Spjd bzero(drc, sizeof (dmu_recv_cookie_t)); 1681289362Smav drc->drc_drr_begin = drr_begin; 1682289362Smav drc->drc_drrb = &drr_begin->drr_u.drr_begin; 1683185029Spjd drc->drc_tosnap = tosnap; 1684248571Smm drc->drc_tofs = tofs; 1685185029Spjd drc->drc_force = force; 1686289362Smav drc->drc_resumable = resumable; 1687264835Sdelphij drc->drc_cred = CRED(); 1688168404Spjd 1689289362Smav if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { 1690248571Smm drc->drc_byteswap = B_TRUE; 1691289362Smav fletcher_4_incremental_byteswap(drr_begin, 1692248571Smm sizeof (dmu_replay_record_t), &drc->drc_cksum); 1693289362Smav byteswap_record(drr_begin); 1694289362Smav } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { 1695289362Smav fletcher_4_incremental_native(drr_begin, 1696289362Smav sizeof (dmu_replay_record_t), &drc->drc_cksum); 1697248571Smm } else { 1698289362Smav return (SET_ERROR(EINVAL)); 1699248571Smm } 1700219089Spjd 1701248571Smm drba.drba_origin = origin; 1702248571Smm drba.drba_cookie = drc; 1703248571Smm drba.drba_cred = CRED(); 1704219089Spjd 1705289362Smav if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & 1706289362Smav DMU_BACKUP_FEATURE_RESUMING) { 1707289362Smav return (dsl_sync_task(tofs, 1708289362Smav dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync, 1709289362Smav &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1710289362Smav } else { 1711289362Smav return (dsl_sync_task(tofs, 1712289362Smav dmu_recv_begin_check, dmu_recv_begin_sync, 1713289362Smav &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1714289362Smav } 1715168404Spjd} 1716168404Spjd 1717286705Smavstruct receive_record_arg { 1718286705Smav dmu_replay_record_t header; 1719286705Smav void *payload; /* Pointer to a buffer containing the payload */ 1720286705Smav /* 1721286705Smav * If the record is a write, pointer to the arc_buf_t containing the 1722286705Smav * payload. 1723286705Smav */ 1724286705Smav arc_buf_t *write_buf; 1725286705Smav int payload_size; 1726289362Smav uint64_t bytes_read; /* bytes read from stream when record created */ 1727286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 1728286705Smav bqueue_node_t node; 1729286705Smav}; 1730286705Smav 1731286705Smavstruct receive_writer_arg { 1732286587Smav objset_t *os; 1733286705Smav boolean_t byteswap; 1734286705Smav bqueue_t q; 1735289362Smav 1736286705Smav /* 1737286705Smav * These three args are used to signal to the main thread that we're 1738286705Smav * done. 1739286705Smav */ 1740286705Smav kmutex_t mutex; 1741286705Smav kcondvar_t cv; 1742286705Smav boolean_t done; 1743289362Smav 1744185029Spjd int err; 1745286705Smav /* A map from guid to dataset to help handle dedup'd streams. */ 1746286705Smav avl_tree_t *guid_to_ds_map; 1747289362Smav boolean_t resumable; 1748289362Smav uint64_t last_object, last_offset; 1749289362Smav uint64_t bytes_read; /* bytes read when current record created */ 1750286705Smav}; 1751286705Smav 1752294815Smavstruct objlist { 1753294815Smav list_t list; /* List of struct receive_objnode. */ 1754294815Smav /* 1755294815Smav * Last object looked up. Used to assert that objects are being looked 1756294815Smav * up in ascending order. 1757294815Smav */ 1758294815Smav uint64_t last_lookup; 1759294815Smav}; 1760294815Smav 1761294815Smavstruct receive_objnode { 1762294815Smav list_node_t node; 1763294815Smav uint64_t object; 1764294815Smav}; 1765294815Smav 1766286705Smavstruct receive_arg { 1767286705Smav objset_t *os; 1768185029Spjd kthread_t *td; 1769185029Spjd struct file *fp; 1770286705Smav uint64_t voff; /* The current offset in the stream */ 1771289362Smav uint64_t bytes_read; 1772286705Smav /* 1773286705Smav * A record that has had its payload read in, but hasn't yet been handed 1774286705Smav * off to the worker thread. 1775286705Smav */ 1776286705Smav struct receive_record_arg *rrd; 1777286705Smav /* A record that has had its header read in, but not its payload. */ 1778286705Smav struct receive_record_arg *next_rrd; 1779185029Spjd zio_cksum_t cksum; 1780286587Smav zio_cksum_t prev_cksum; 1781286705Smav int err; 1782286705Smav boolean_t byteswap; 1783286705Smav /* Sorted list of objects not to issue prefetches for. */ 1784294815Smav struct objlist ignore_objlist; 1785286705Smav}; 1786286587Smav 1787219089Spjdtypedef struct guid_map_entry { 1788219089Spjd uint64_t guid; 1789219089Spjd dsl_dataset_t *gme_ds; 1790219089Spjd avl_node_t avlnode; 1791219089Spjd} guid_map_entry_t; 1792219089Spjd 1793168404Spjdstatic int 1794219089Spjdguid_compare(const void *arg1, const void *arg2) 1795168404Spjd{ 1796219089Spjd const guid_map_entry_t *gmep1 = arg1; 1797219089Spjd const guid_map_entry_t *gmep2 = arg2; 1798219089Spjd 1799219089Spjd if (gmep1->guid < gmep2->guid) 1800219089Spjd return (-1); 1801219089Spjd else if (gmep1->guid > gmep2->guid) 1802219089Spjd return (1); 1803219089Spjd return (0); 1804219089Spjd} 1805219089Spjd 1806219089Spjdstatic void 1807219089Spjdfree_guid_map_onexit(void *arg) 1808219089Spjd{ 1809219089Spjd avl_tree_t *ca = arg; 1810219089Spjd void *cookie = NULL; 1811219089Spjd guid_map_entry_t *gmep; 1812219089Spjd 1813219089Spjd while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { 1814248571Smm dsl_dataset_long_rele(gmep->gme_ds, gmep); 1815249196Smm dsl_dataset_rele(gmep->gme_ds, gmep); 1816219089Spjd kmem_free(gmep, sizeof (guid_map_entry_t)); 1817219089Spjd } 1818219089Spjd avl_destroy(ca); 1819219089Spjd kmem_free(ca, sizeof (avl_tree_t)); 1820219089Spjd} 1821219089Spjd 1822219089Spjdstatic int 1823286705Smavrestore_bytes(struct receive_arg *ra, void *buf, int len, off_t off, ssize_t *resid) 1824219089Spjd{ 1825168404Spjd struct uio auio; 1826168404Spjd struct iovec aiov; 1827168404Spjd int error; 1828168404Spjd 1829168404Spjd aiov.iov_base = buf; 1830168404Spjd aiov.iov_len = len; 1831168404Spjd auio.uio_iov = &aiov; 1832168404Spjd auio.uio_iovcnt = 1; 1833168404Spjd auio.uio_resid = len; 1834169170Spjd auio.uio_segflg = UIO_SYSSPACE; 1835168404Spjd auio.uio_rw = UIO_READ; 1836168404Spjd auio.uio_offset = off; 1837168404Spjd auio.uio_td = ra->td; 1838168404Spjd#ifdef _KERNEL 1839168404Spjd error = fo_read(ra->fp, &auio, ra->td->td_ucred, FOF_OFFSET, ra->td); 1840168404Spjd#else 1841168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 1842168404Spjd error = EOPNOTSUPP; 1843168404Spjd#endif 1844168404Spjd *resid = auio.uio_resid; 1845168404Spjd return (error); 1846168404Spjd} 1847168404Spjd 1848286587Smavstatic int 1849286705Smavreceive_read(struct receive_arg *ra, int len, void *buf) 1850168404Spjd{ 1851185029Spjd int done = 0; 1852168404Spjd 1853297509Smav /* 1854297509Smav * The code doesn't rely on this (lengths being multiples of 8). See 1855297509Smav * comment in dump_bytes. 1856297509Smav */ 1857240415Smm ASSERT0(len % 8); 1858168404Spjd 1859185029Spjd while (done < len) { 1860219089Spjd ssize_t resid; 1861168404Spjd 1862272601Sdelphij ra->err = restore_bytes(ra, buf + done, 1863185029Spjd len - done, ra->voff, &resid); 1864168404Spjd 1865289362Smav if (resid == len - done) { 1866289362Smav /* 1867289362Smav * Note: ECKSUM indicates that the receive 1868289362Smav * was interrupted and can potentially be resumed. 1869289362Smav */ 1870289362Smav ra->err = SET_ERROR(ECKSUM); 1871289362Smav } 1872185029Spjd ra->voff += len - done - resid; 1873185029Spjd done = len - resid; 1874248571Smm if (ra->err != 0) 1875286587Smav return (ra->err); 1876168404Spjd } 1877168404Spjd 1878289362Smav ra->bytes_read += len; 1879289362Smav 1880185029Spjd ASSERT3U(done, ==, len); 1881286587Smav return (0); 1882168404Spjd} 1883168404Spjd 1884168404Spjdstatic void 1885286587Smavbyteswap_record(dmu_replay_record_t *drr) 1886168404Spjd{ 1887168404Spjd#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) 1888168404Spjd#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) 1889168404Spjd drr->drr_type = BSWAP_32(drr->drr_type); 1890185029Spjd drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); 1891286587Smav 1892168404Spjd switch (drr->drr_type) { 1893168404Spjd case DRR_BEGIN: 1894168404Spjd DO64(drr_begin.drr_magic); 1895219089Spjd DO64(drr_begin.drr_versioninfo); 1896168404Spjd DO64(drr_begin.drr_creation_time); 1897168404Spjd DO32(drr_begin.drr_type); 1898185029Spjd DO32(drr_begin.drr_flags); 1899168404Spjd DO64(drr_begin.drr_toguid); 1900168404Spjd DO64(drr_begin.drr_fromguid); 1901168404Spjd break; 1902168404Spjd case DRR_OBJECT: 1903168404Spjd DO64(drr_object.drr_object); 1904168404Spjd DO32(drr_object.drr_type); 1905168404Spjd DO32(drr_object.drr_bonustype); 1906168404Spjd DO32(drr_object.drr_blksz); 1907168404Spjd DO32(drr_object.drr_bonuslen); 1908219089Spjd DO64(drr_object.drr_toguid); 1909168404Spjd break; 1910168404Spjd case DRR_FREEOBJECTS: 1911168404Spjd DO64(drr_freeobjects.drr_firstobj); 1912168404Spjd DO64(drr_freeobjects.drr_numobjs); 1913219089Spjd DO64(drr_freeobjects.drr_toguid); 1914168404Spjd break; 1915168404Spjd case DRR_WRITE: 1916168404Spjd DO64(drr_write.drr_object); 1917168404Spjd DO32(drr_write.drr_type); 1918168404Spjd DO64(drr_write.drr_offset); 1919168404Spjd DO64(drr_write.drr_length); 1920219089Spjd DO64(drr_write.drr_toguid); 1921286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); 1922219089Spjd DO64(drr_write.drr_key.ddk_prop); 1923168404Spjd break; 1924219089Spjd case DRR_WRITE_BYREF: 1925219089Spjd DO64(drr_write_byref.drr_object); 1926219089Spjd DO64(drr_write_byref.drr_offset); 1927219089Spjd DO64(drr_write_byref.drr_length); 1928219089Spjd DO64(drr_write_byref.drr_toguid); 1929219089Spjd DO64(drr_write_byref.drr_refguid); 1930219089Spjd DO64(drr_write_byref.drr_refobject); 1931219089Spjd DO64(drr_write_byref.drr_refoffset); 1932286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. 1933286587Smav drr_key.ddk_cksum); 1934219089Spjd DO64(drr_write_byref.drr_key.ddk_prop); 1935219089Spjd break; 1936268075Sdelphij case DRR_WRITE_EMBEDDED: 1937268075Sdelphij DO64(drr_write_embedded.drr_object); 1938268075Sdelphij DO64(drr_write_embedded.drr_offset); 1939268075Sdelphij DO64(drr_write_embedded.drr_length); 1940268075Sdelphij DO64(drr_write_embedded.drr_toguid); 1941268075Sdelphij DO32(drr_write_embedded.drr_lsize); 1942268075Sdelphij DO32(drr_write_embedded.drr_psize); 1943268075Sdelphij break; 1944168404Spjd case DRR_FREE: 1945168404Spjd DO64(drr_free.drr_object); 1946168404Spjd DO64(drr_free.drr_offset); 1947168404Spjd DO64(drr_free.drr_length); 1948219089Spjd DO64(drr_free.drr_toguid); 1949168404Spjd break; 1950219089Spjd case DRR_SPILL: 1951219089Spjd DO64(drr_spill.drr_object); 1952219089Spjd DO64(drr_spill.drr_length); 1953219089Spjd DO64(drr_spill.drr_toguid); 1954219089Spjd break; 1955168404Spjd case DRR_END: 1956219089Spjd DO64(drr_end.drr_toguid); 1957286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); 1958168404Spjd break; 1959168404Spjd } 1960286587Smav 1961286587Smav if (drr->drr_type != DRR_BEGIN) { 1962286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); 1963286587Smav } 1964286587Smav 1965168404Spjd#undef DO64 1966168404Spjd#undef DO32 1967168404Spjd} 1968168404Spjd 1969272810Sdelphijstatic inline uint8_t 1970272810Sdelphijdeduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) 1971272810Sdelphij{ 1972272810Sdelphij if (bonus_type == DMU_OT_SA) { 1973272810Sdelphij return (1); 1974272810Sdelphij } else { 1975272810Sdelphij return (1 + 1976272810Sdelphij ((DN_MAX_BONUSLEN - bonus_size) >> SPA_BLKPTRSHIFT)); 1977272810Sdelphij } 1978272810Sdelphij} 1979272810Sdelphij 1980289362Smavstatic void 1981289362Smavsave_resume_state(struct receive_writer_arg *rwa, 1982289362Smav uint64_t object, uint64_t offset, dmu_tx_t *tx) 1983289362Smav{ 1984289362Smav int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; 1985289362Smav 1986289362Smav if (!rwa->resumable) 1987289362Smav return; 1988289362Smav 1989289362Smav /* 1990289362Smav * We use ds_resume_bytes[] != 0 to indicate that we need to 1991289362Smav * update this on disk, so it must not be 0. 1992289362Smav */ 1993289362Smav ASSERT(rwa->bytes_read != 0); 1994289362Smav 1995289362Smav /* 1996289362Smav * We only resume from write records, which have a valid 1997289362Smav * (non-meta-dnode) object number. 1998289362Smav */ 1999289362Smav ASSERT(object != 0); 2000289362Smav 2001289362Smav /* 2002289362Smav * For resuming to work correctly, we must receive records in order, 2003289362Smav * sorted by object,offset. This is checked by the callers, but 2004289362Smav * assert it here for good measure. 2005289362Smav */ 2006289362Smav ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]); 2007289362Smav ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] || 2008289362Smav offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]); 2009289362Smav ASSERT3U(rwa->bytes_read, >=, 2010289362Smav rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]); 2011289362Smav 2012289362Smav rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object; 2013289362Smav rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset; 2014289362Smav rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read; 2015289362Smav} 2016289362Smav 2017168404Spjdstatic int 2018286705Smavreceive_object(struct receive_writer_arg *rwa, struct drr_object *drro, 2019286705Smav void *data) 2020168404Spjd{ 2021272810Sdelphij dmu_object_info_t doi; 2022168404Spjd dmu_tx_t *tx; 2023272810Sdelphij uint64_t object; 2024272810Sdelphij int err; 2025168404Spjd 2026168404Spjd if (drro->drr_type == DMU_OT_NONE || 2027236884Smm !DMU_OT_IS_VALID(drro->drr_type) || 2028236884Smm !DMU_OT_IS_VALID(drro->drr_bonustype) || 2029219089Spjd drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || 2030168404Spjd drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || 2031168404Spjd P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || 2032168404Spjd drro->drr_blksz < SPA_MINBLOCKSIZE || 2033286705Smav drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || 2034168404Spjd drro->drr_bonuslen > DN_MAX_BONUSLEN) { 2035249195Smm return (SET_ERROR(EINVAL)); 2036168404Spjd } 2037168404Spjd 2038286705Smav err = dmu_object_info(rwa->os, drro->drr_object, &doi); 2039168404Spjd 2040200726Sdelphij if (err != 0 && err != ENOENT) 2041249195Smm return (SET_ERROR(EINVAL)); 2042272810Sdelphij object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; 2043200726Sdelphij 2044272810Sdelphij /* 2045272810Sdelphij * If we are losing blkptrs or changing the block size this must 2046272810Sdelphij * be a new file instance. We must clear out the previous file 2047272810Sdelphij * contents before we can change this type of metadata in the dnode. 2048272810Sdelphij */ 2049272810Sdelphij if (err == 0) { 2050272810Sdelphij int nblkptr; 2051272810Sdelphij 2052272810Sdelphij nblkptr = deduce_nblkptr(drro->drr_bonustype, 2053272810Sdelphij drro->drr_bonuslen); 2054272810Sdelphij 2055272810Sdelphij if (drro->drr_blksz != doi.doi_data_block_size || 2056272810Sdelphij nblkptr < doi.doi_nblkptr) { 2057286705Smav err = dmu_free_long_range(rwa->os, drro->drr_object, 2058272810Sdelphij 0, DMU_OBJECT_END); 2059272810Sdelphij if (err != 0) 2060272810Sdelphij return (SET_ERROR(EINVAL)); 2061272810Sdelphij } 2062272810Sdelphij } 2063272810Sdelphij 2064286705Smav tx = dmu_tx_create(rwa->os); 2065272810Sdelphij dmu_tx_hold_bonus(tx, object); 2066272810Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 2067272810Sdelphij if (err != 0) { 2068272810Sdelphij dmu_tx_abort(tx); 2069272810Sdelphij return (err); 2070272810Sdelphij } 2071272810Sdelphij 2072272810Sdelphij if (object == DMU_NEW_OBJECT) { 2073168404Spjd /* currently free, want to be allocated */ 2074286705Smav err = dmu_object_claim(rwa->os, drro->drr_object, 2075168404Spjd drro->drr_type, drro->drr_blksz, 2076168404Spjd drro->drr_bonustype, drro->drr_bonuslen, tx); 2077272810Sdelphij } else if (drro->drr_type != doi.doi_type || 2078272810Sdelphij drro->drr_blksz != doi.doi_data_block_size || 2079272810Sdelphij drro->drr_bonustype != doi.doi_bonus_type || 2080272810Sdelphij drro->drr_bonuslen != doi.doi_bonus_size) { 2081272810Sdelphij /* currently allocated, but with different properties */ 2082286705Smav err = dmu_object_reclaim(rwa->os, drro->drr_object, 2083168404Spjd drro->drr_type, drro->drr_blksz, 2084272810Sdelphij drro->drr_bonustype, drro->drr_bonuslen, tx); 2085168404Spjd } 2086248571Smm if (err != 0) { 2087272810Sdelphij dmu_tx_commit(tx); 2088249195Smm return (SET_ERROR(EINVAL)); 2089219089Spjd } 2090200726Sdelphij 2091286705Smav dmu_object_set_checksum(rwa->os, drro->drr_object, 2092286587Smav drro->drr_checksumtype, tx); 2093286705Smav dmu_object_set_compress(rwa->os, drro->drr_object, 2094286587Smav drro->drr_compress, tx); 2095168404Spjd 2096200727Sdelphij if (data != NULL) { 2097168404Spjd dmu_buf_t *db; 2098200727Sdelphij 2099286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db)); 2100168404Spjd dmu_buf_will_dirty(db, tx); 2101168404Spjd 2102185029Spjd ASSERT3U(db->db_size, >=, drro->drr_bonuslen); 2103185029Spjd bcopy(data, db->db_data, drro->drr_bonuslen); 2104286705Smav if (rwa->byteswap) { 2105236884Smm dmu_object_byteswap_t byteswap = 2106236884Smm DMU_OT_BYTESWAP(drro->drr_bonustype); 2107236884Smm dmu_ot_byteswap[byteswap].ob_func(db->db_data, 2108168404Spjd drro->drr_bonuslen); 2109168404Spjd } 2110168404Spjd dmu_buf_rele(db, FTAG); 2111168404Spjd } 2112168404Spjd dmu_tx_commit(tx); 2113289362Smav 2114168404Spjd return (0); 2115168404Spjd} 2116168404Spjd 2117168404Spjd/* ARGSUSED */ 2118168404Spjdstatic int 2119286705Smavreceive_freeobjects(struct receive_writer_arg *rwa, 2120168404Spjd struct drr_freeobjects *drrfo) 2121168404Spjd{ 2122168404Spjd uint64_t obj; 2123294815Smav int next_err = 0; 2124168404Spjd 2125168404Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) 2126249195Smm return (SET_ERROR(EINVAL)); 2127168404Spjd 2128168404Spjd for (obj = drrfo->drr_firstobj; 2129294815Smav obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0; 2130294815Smav next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) { 2131168404Spjd int err; 2132168404Spjd 2133286705Smav if (dmu_object_info(rwa->os, obj, NULL) != 0) 2134168404Spjd continue; 2135168404Spjd 2136286705Smav err = dmu_free_long_object(rwa->os, obj); 2137248571Smm if (err != 0) 2138168404Spjd return (err); 2139168404Spjd } 2140294815Smav if (next_err != ESRCH) 2141294815Smav return (next_err); 2142168404Spjd return (0); 2143168404Spjd} 2144168404Spjd 2145168404Spjdstatic int 2146286705Smavreceive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, 2147286705Smav arc_buf_t *abuf) 2148168404Spjd{ 2149168404Spjd dmu_tx_t *tx; 2150168404Spjd int err; 2151168404Spjd 2152168404Spjd if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || 2153236884Smm !DMU_OT_IS_VALID(drrw->drr_type)) 2154249195Smm return (SET_ERROR(EINVAL)); 2155168404Spjd 2156289362Smav /* 2157289362Smav * For resuming to work, records must be in increasing order 2158289362Smav * by (object, offset). 2159289362Smav */ 2160289362Smav if (drrw->drr_object < rwa->last_object || 2161289362Smav (drrw->drr_object == rwa->last_object && 2162289362Smav drrw->drr_offset < rwa->last_offset)) { 2163289362Smav return (SET_ERROR(EINVAL)); 2164289362Smav } 2165289362Smav rwa->last_object = drrw->drr_object; 2166289362Smav rwa->last_offset = drrw->drr_offset; 2167289362Smav 2168286705Smav if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) 2169249195Smm return (SET_ERROR(EINVAL)); 2170168404Spjd 2171286705Smav tx = dmu_tx_create(rwa->os); 2172272601Sdelphij 2173168404Spjd dmu_tx_hold_write(tx, drrw->drr_object, 2174168404Spjd drrw->drr_offset, drrw->drr_length); 2175168404Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2176248571Smm if (err != 0) { 2177168404Spjd dmu_tx_abort(tx); 2178168404Spjd return (err); 2179168404Spjd } 2180286705Smav if (rwa->byteswap) { 2181236884Smm dmu_object_byteswap_t byteswap = 2182236884Smm DMU_OT_BYTESWAP(drrw->drr_type); 2183286587Smav dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, 2184286587Smav drrw->drr_length); 2185236884Smm } 2186286587Smav 2187286587Smav dmu_buf_t *bonus; 2188286705Smav if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) 2189286587Smav return (SET_ERROR(EINVAL)); 2190272601Sdelphij dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); 2191289362Smav 2192289362Smav /* 2193289362Smav * Note: If the receive fails, we want the resume stream to start 2194289362Smav * with the same record that we last successfully received (as opposed 2195289362Smav * to the next record), so that we can verify that we are 2196289362Smav * resuming from the correct location. 2197289362Smav */ 2198289362Smav save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx); 2199168404Spjd dmu_tx_commit(tx); 2200272601Sdelphij dmu_buf_rele(bonus, FTAG); 2201289362Smav 2202168404Spjd return (0); 2203168404Spjd} 2204168404Spjd 2205219089Spjd/* 2206219089Spjd * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed 2207219089Spjd * streams to refer to a copy of the data that is already on the 2208219089Spjd * system because it came in earlier in the stream. This function 2209219089Spjd * finds the earlier copy of the data, and uses that copy instead of 2210219089Spjd * data from the stream to fulfill this write. 2211219089Spjd */ 2212219089Spjdstatic int 2213286705Smavreceive_write_byref(struct receive_writer_arg *rwa, 2214286705Smav struct drr_write_byref *drrwbr) 2215219089Spjd{ 2216219089Spjd dmu_tx_t *tx; 2217219089Spjd int err; 2218219089Spjd guid_map_entry_t gmesrch; 2219219089Spjd guid_map_entry_t *gmep; 2220268075Sdelphij avl_index_t where; 2221219089Spjd objset_t *ref_os = NULL; 2222219089Spjd dmu_buf_t *dbp; 2223219089Spjd 2224219089Spjd if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) 2225249195Smm return (SET_ERROR(EINVAL)); 2226219089Spjd 2227219089Spjd /* 2228219089Spjd * If the GUID of the referenced dataset is different from the 2229219089Spjd * GUID of the target dataset, find the referenced dataset. 2230219089Spjd */ 2231219089Spjd if (drrwbr->drr_toguid != drrwbr->drr_refguid) { 2232219089Spjd gmesrch.guid = drrwbr->drr_refguid; 2233286705Smav if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, 2234219089Spjd &where)) == NULL) { 2235249195Smm return (SET_ERROR(EINVAL)); 2236219089Spjd } 2237219089Spjd if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) 2238249195Smm return (SET_ERROR(EINVAL)); 2239219089Spjd } else { 2240286705Smav ref_os = rwa->os; 2241219089Spjd } 2242219089Spjd 2243268075Sdelphij err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, 2244268075Sdelphij drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); 2245268075Sdelphij if (err != 0) 2246219089Spjd return (err); 2247219089Spjd 2248286705Smav tx = dmu_tx_create(rwa->os); 2249219089Spjd 2250219089Spjd dmu_tx_hold_write(tx, drrwbr->drr_object, 2251219089Spjd drrwbr->drr_offset, drrwbr->drr_length); 2252219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2253248571Smm if (err != 0) { 2254219089Spjd dmu_tx_abort(tx); 2255219089Spjd return (err); 2256219089Spjd } 2257286705Smav dmu_write(rwa->os, drrwbr->drr_object, 2258219089Spjd drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); 2259219089Spjd dmu_buf_rele(dbp, FTAG); 2260289362Smav 2261289362Smav /* See comment in restore_write. */ 2262289362Smav save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx); 2263219089Spjd dmu_tx_commit(tx); 2264219089Spjd return (0); 2265219089Spjd} 2266219089Spjd 2267219089Spjdstatic int 2268286705Smavreceive_write_embedded(struct receive_writer_arg *rwa, 2269289362Smav struct drr_write_embedded *drrwe, void *data) 2270268075Sdelphij{ 2271268075Sdelphij dmu_tx_t *tx; 2272268075Sdelphij int err; 2273268075Sdelphij 2274289362Smav if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) 2275268075Sdelphij return (EINVAL); 2276268075Sdelphij 2277289362Smav if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) 2278268075Sdelphij return (EINVAL); 2279268075Sdelphij 2280289362Smav if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) 2281268075Sdelphij return (EINVAL); 2282289362Smav if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) 2283268075Sdelphij return (EINVAL); 2284268075Sdelphij 2285286705Smav tx = dmu_tx_create(rwa->os); 2286268075Sdelphij 2287289362Smav dmu_tx_hold_write(tx, drrwe->drr_object, 2288289362Smav drrwe->drr_offset, drrwe->drr_length); 2289268075Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 2290268075Sdelphij if (err != 0) { 2291268075Sdelphij dmu_tx_abort(tx); 2292268075Sdelphij return (err); 2293268075Sdelphij } 2294268075Sdelphij 2295289362Smav dmu_write_embedded(rwa->os, drrwe->drr_object, 2296289362Smav drrwe->drr_offset, data, drrwe->drr_etype, 2297289362Smav drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize, 2298286705Smav rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); 2299268075Sdelphij 2300289362Smav /* See comment in restore_write. */ 2301289362Smav save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx); 2302268075Sdelphij dmu_tx_commit(tx); 2303268075Sdelphij return (0); 2304268075Sdelphij} 2305268075Sdelphij 2306268075Sdelphijstatic int 2307286705Smavreceive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, 2308286705Smav void *data) 2309219089Spjd{ 2310219089Spjd dmu_tx_t *tx; 2311219089Spjd dmu_buf_t *db, *db_spill; 2312219089Spjd int err; 2313219089Spjd 2314219089Spjd if (drrs->drr_length < SPA_MINBLOCKSIZE || 2315286705Smav drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) 2316249195Smm return (SET_ERROR(EINVAL)); 2317219089Spjd 2318286705Smav if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) 2319249195Smm return (SET_ERROR(EINVAL)); 2320219089Spjd 2321286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); 2322219089Spjd if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { 2323219089Spjd dmu_buf_rele(db, FTAG); 2324219089Spjd return (err); 2325219089Spjd } 2326219089Spjd 2327286705Smav tx = dmu_tx_create(rwa->os); 2328219089Spjd 2329219089Spjd dmu_tx_hold_spill(tx, db->db_object); 2330219089Spjd 2331219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2332248571Smm if (err != 0) { 2333219089Spjd dmu_buf_rele(db, FTAG); 2334219089Spjd dmu_buf_rele(db_spill, FTAG); 2335219089Spjd dmu_tx_abort(tx); 2336219089Spjd return (err); 2337219089Spjd } 2338219089Spjd dmu_buf_will_dirty(db_spill, tx); 2339219089Spjd 2340219089Spjd if (db_spill->db_size < drrs->drr_length) 2341219089Spjd VERIFY(0 == dbuf_spill_set_blksz(db_spill, 2342219089Spjd drrs->drr_length, tx)); 2343219089Spjd bcopy(data, db_spill->db_data, drrs->drr_length); 2344219089Spjd 2345219089Spjd dmu_buf_rele(db, FTAG); 2346219089Spjd dmu_buf_rele(db_spill, FTAG); 2347219089Spjd 2348219089Spjd dmu_tx_commit(tx); 2349219089Spjd return (0); 2350219089Spjd} 2351219089Spjd 2352168404Spjd/* ARGSUSED */ 2353168404Spjdstatic int 2354286705Smavreceive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) 2355168404Spjd{ 2356168404Spjd int err; 2357168404Spjd 2358168404Spjd if (drrf->drr_length != -1ULL && 2359168404Spjd drrf->drr_offset + drrf->drr_length < drrf->drr_offset) 2360249195Smm return (SET_ERROR(EINVAL)); 2361168404Spjd 2362286705Smav if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) 2363249195Smm return (SET_ERROR(EINVAL)); 2364168404Spjd 2365286705Smav err = dmu_free_long_range(rwa->os, drrf->drr_object, 2366168404Spjd drrf->drr_offset, drrf->drr_length); 2367286705Smav 2368168404Spjd return (err); 2369168404Spjd} 2370168404Spjd 2371248571Smm/* used to destroy the drc_ds on error */ 2372248571Smmstatic void 2373248571Smmdmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) 2374248571Smm{ 2375289362Smav if (drc->drc_resumable) { 2376289362Smav /* wait for our resume state to be written to disk */ 2377289362Smav txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0); 2378289362Smav dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2379289362Smav } else { 2380307108Smav char name[ZFS_MAX_DATASET_NAME_LEN]; 2381289362Smav dsl_dataset_name(drc->drc_ds, name); 2382289362Smav dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2383289362Smav (void) dsl_destroy_head(name); 2384289362Smav } 2385248571Smm} 2386248571Smm 2387286587Smavstatic void 2388286705Smavreceive_cksum(struct receive_arg *ra, int len, void *buf) 2389286587Smav{ 2390286587Smav if (ra->byteswap) { 2391286587Smav fletcher_4_incremental_byteswap(buf, len, &ra->cksum); 2392286587Smav } else { 2393286587Smav fletcher_4_incremental_native(buf, len, &ra->cksum); 2394286587Smav } 2395286587Smav} 2396286587Smav 2397185029Spjd/* 2398286705Smav * Read the payload into a buffer of size len, and update the current record's 2399286705Smav * payload field. 2400286705Smav * Allocate ra->next_rrd and read the next record's header into 2401286705Smav * ra->next_rrd->header. 2402286587Smav * Verify checksum of payload and next record. 2403286587Smav */ 2404286587Smavstatic int 2405286705Smavreceive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) 2406286587Smav{ 2407286587Smav int err; 2408286587Smav 2409286587Smav if (len != 0) { 2410286705Smav ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); 2411289362Smav err = receive_read(ra, len, buf); 2412286587Smav if (err != 0) 2413286587Smav return (err); 2414289362Smav receive_cksum(ra, len, buf); 2415289362Smav 2416289362Smav /* note: rrd is NULL when reading the begin record's payload */ 2417289362Smav if (ra->rrd != NULL) { 2418289362Smav ra->rrd->payload = buf; 2419289362Smav ra->rrd->payload_size = len; 2420289362Smav ra->rrd->bytes_read = ra->bytes_read; 2421289362Smav } 2422286587Smav } 2423286587Smav 2424286587Smav ra->prev_cksum = ra->cksum; 2425286587Smav 2426286705Smav ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); 2427286705Smav err = receive_read(ra, sizeof (ra->next_rrd->header), 2428286705Smav &ra->next_rrd->header); 2429289362Smav ra->next_rrd->bytes_read = ra->bytes_read; 2430286705Smav if (err != 0) { 2431286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2432286705Smav ra->next_rrd = NULL; 2433286587Smav return (err); 2434286705Smav } 2435286705Smav if (ra->next_rrd->header.drr_type == DRR_BEGIN) { 2436286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2437286705Smav ra->next_rrd = NULL; 2438286587Smav return (SET_ERROR(EINVAL)); 2439286705Smav } 2440286587Smav 2441286587Smav /* 2442286587Smav * Note: checksum is of everything up to but not including the 2443286587Smav * checksum itself. 2444286587Smav */ 2445286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2446286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 2447286705Smav receive_cksum(ra, 2448286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2449286705Smav &ra->next_rrd->header); 2450286587Smav 2451286705Smav zio_cksum_t cksum_orig = 2452286705Smav ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2453286705Smav zio_cksum_t *cksump = 2454286705Smav &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2455286587Smav 2456286587Smav if (ra->byteswap) 2457286705Smav byteswap_record(&ra->next_rrd->header); 2458286587Smav 2459286587Smav if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && 2460286705Smav !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { 2461286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2462286705Smav ra->next_rrd = NULL; 2463286587Smav return (SET_ERROR(ECKSUM)); 2464286705Smav } 2465286587Smav 2466286705Smav receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); 2467286587Smav 2468286587Smav return (0); 2469286587Smav} 2470286587Smav 2471294815Smavstatic void 2472294815Smavobjlist_create(struct objlist *list) 2473294815Smav{ 2474294815Smav list_create(&list->list, sizeof (struct receive_objnode), 2475294815Smav offsetof(struct receive_objnode, node)); 2476294815Smav list->last_lookup = 0; 2477294815Smav} 2478294815Smav 2479294815Smavstatic void 2480294815Smavobjlist_destroy(struct objlist *list) 2481294815Smav{ 2482294815Smav for (struct receive_objnode *n = list_remove_head(&list->list); 2483294815Smav n != NULL; n = list_remove_head(&list->list)) { 2484294815Smav kmem_free(n, sizeof (*n)); 2485294815Smav } 2486294815Smav list_destroy(&list->list); 2487294815Smav} 2488294815Smav 2489286705Smav/* 2490294815Smav * This function looks through the objlist to see if the specified object number 2491294815Smav * is contained in the objlist. In the process, it will remove all object 2492294815Smav * numbers in the list that are smaller than the specified object number. Thus, 2493294815Smav * any lookup of an object number smaller than a previously looked up object 2494294815Smav * number will always return false; therefore, all lookups should be done in 2495294815Smav * ascending order. 2496294815Smav */ 2497294815Smavstatic boolean_t 2498294815Smavobjlist_exists(struct objlist *list, uint64_t object) 2499294815Smav{ 2500294815Smav struct receive_objnode *node = list_head(&list->list); 2501294815Smav ASSERT3U(object, >=, list->last_lookup); 2502294815Smav list->last_lookup = object; 2503294815Smav while (node != NULL && node->object < object) { 2504294815Smav VERIFY3P(node, ==, list_remove_head(&list->list)); 2505294815Smav kmem_free(node, sizeof (*node)); 2506294815Smav node = list_head(&list->list); 2507294815Smav } 2508294815Smav return (node != NULL && node->object == object); 2509294815Smav} 2510294815Smav 2511294815Smav/* 2512294815Smav * The objlist is a list of object numbers stored in ascending order. However, 2513294815Smav * the insertion of new object numbers does not seek out the correct location to 2514294815Smav * store a new object number; instead, it appends it to the list for simplicity. 2515294815Smav * Thus, any users must take care to only insert new object numbers in ascending 2516294815Smav * order. 2517294815Smav */ 2518294815Smavstatic void 2519294815Smavobjlist_insert(struct objlist *list, uint64_t object) 2520294815Smav{ 2521294815Smav struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP); 2522294815Smav node->object = object; 2523294815Smav#ifdef ZFS_DEBUG 2524294815Smav struct receive_objnode *last_object = list_tail(&list->list); 2525294815Smav uint64_t last_objnum = (last_object != NULL ? last_object->object : 0); 2526294815Smav ASSERT3U(node->object, >, last_objnum); 2527294815Smav#endif 2528294815Smav list_insert_tail(&list->list, node); 2529294815Smav} 2530294815Smav 2531294815Smav/* 2532286705Smav * Issue the prefetch reads for any necessary indirect blocks. 2533286705Smav * 2534286705Smav * We use the object ignore list to tell us whether or not to issue prefetches 2535286705Smav * for a given object. We do this for both correctness (in case the blocksize 2536286705Smav * of an object has changed) and performance (if the object doesn't exist, don't 2537286705Smav * needlessly try to issue prefetches). We also trim the list as we go through 2538286705Smav * the stream to prevent it from growing to an unbounded size. 2539286705Smav * 2540286705Smav * The object numbers within will always be in sorted order, and any write 2541286705Smav * records we see will also be in sorted order, but they're not sorted with 2542286705Smav * respect to each other (i.e. we can get several object records before 2543286705Smav * receiving each object's write records). As a result, once we've reached a 2544286705Smav * given object number, we can safely remove any reference to lower object 2545286705Smav * numbers in the ignore list. In practice, we receive up to 32 object records 2546286705Smav * before receiving write records, so the list can have up to 32 nodes in it. 2547286705Smav */ 2548286705Smav/* ARGSUSED */ 2549286705Smavstatic void 2550286705Smavreceive_read_prefetch(struct receive_arg *ra, 2551286705Smav uint64_t object, uint64_t offset, uint64_t length) 2552286705Smav{ 2553294815Smav if (!objlist_exists(&ra->ignore_objlist, object)) { 2554286705Smav dmu_prefetch(ra->os, object, 1, offset, length, 2555286705Smav ZIO_PRIORITY_SYNC_READ); 2556286705Smav } 2557286705Smav} 2558286705Smav 2559286705Smav/* 2560286705Smav * Read records off the stream, issuing any necessary prefetches. 2561286705Smav */ 2562286587Smavstatic int 2563286705Smavreceive_read_record(struct receive_arg *ra) 2564286587Smav{ 2565286587Smav int err; 2566286587Smav 2567286705Smav switch (ra->rrd->header.drr_type) { 2568286587Smav case DRR_OBJECT: 2569286587Smav { 2570286705Smav struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; 2571286705Smav uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8); 2572286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2573286705Smav dmu_object_info_t doi; 2574286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2575286705Smav if (err != 0) { 2576286705Smav kmem_free(buf, size); 2577286587Smav return (err); 2578286705Smav } 2579286705Smav err = dmu_object_info(ra->os, drro->drr_object, &doi); 2580286705Smav /* 2581286705Smav * See receive_read_prefetch for an explanation why we're 2582286705Smav * storing this object in the ignore_obj_list. 2583286705Smav */ 2584286705Smav if (err == ENOENT || 2585286705Smav (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { 2586294815Smav objlist_insert(&ra->ignore_objlist, drro->drr_object); 2587286705Smav err = 0; 2588286705Smav } 2589286705Smav return (err); 2590286587Smav } 2591286587Smav case DRR_FREEOBJECTS: 2592286587Smav { 2593286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2594286705Smav return (err); 2595286587Smav } 2596286587Smav case DRR_WRITE: 2597286587Smav { 2598286705Smav struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; 2599286587Smav arc_buf_t *abuf = arc_loan_buf(dmu_objset_spa(ra->os), 2600286587Smav drrw->drr_length); 2601286587Smav 2602286705Smav err = receive_read_payload_and_next_header(ra, 2603286587Smav drrw->drr_length, abuf->b_data); 2604286705Smav if (err != 0) { 2605286705Smav dmu_return_arcbuf(abuf); 2606286587Smav return (err); 2607286705Smav } 2608286705Smav ra->rrd->write_buf = abuf; 2609286705Smav receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, 2610286705Smav drrw->drr_length); 2611286587Smav return (err); 2612286587Smav } 2613286587Smav case DRR_WRITE_BYREF: 2614286587Smav { 2615286705Smav struct drr_write_byref *drrwb = 2616286705Smav &ra->rrd->header.drr_u.drr_write_byref; 2617286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2618286705Smav receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, 2619286705Smav drrwb->drr_length); 2620286705Smav return (err); 2621286587Smav } 2622286587Smav case DRR_WRITE_EMBEDDED: 2623286587Smav { 2624286587Smav struct drr_write_embedded *drrwe = 2625286705Smav &ra->rrd->header.drr_u.drr_write_embedded; 2626286705Smav uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); 2627286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2628286705Smav 2629286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2630286705Smav if (err != 0) { 2631286705Smav kmem_free(buf, size); 2632286587Smav return (err); 2633286705Smav } 2634286705Smav 2635286705Smav receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, 2636286705Smav drrwe->drr_length); 2637286705Smav return (err); 2638286587Smav } 2639286587Smav case DRR_FREE: 2640286587Smav { 2641286705Smav /* 2642286705Smav * It might be beneficial to prefetch indirect blocks here, but 2643286705Smav * we don't really have the data to decide for sure. 2644286705Smav */ 2645286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2646286705Smav return (err); 2647286587Smav } 2648286587Smav case DRR_END: 2649286587Smav { 2650286705Smav struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; 2651286587Smav if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) 2652289362Smav return (SET_ERROR(ECKSUM)); 2653286587Smav return (0); 2654286587Smav } 2655286587Smav case DRR_SPILL: 2656286587Smav { 2657286705Smav struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; 2658286705Smav void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP); 2659286705Smav err = receive_read_payload_and_next_header(ra, drrs->drr_length, 2660286705Smav buf); 2661286587Smav if (err != 0) 2662286705Smav kmem_free(buf, drrs->drr_length); 2663286705Smav return (err); 2664286587Smav } 2665286587Smav default: 2666286587Smav return (SET_ERROR(EINVAL)); 2667286587Smav } 2668286587Smav} 2669286587Smav 2670286587Smav/* 2671286705Smav * Commit the records to the pool. 2672286705Smav */ 2673286705Smavstatic int 2674286705Smavreceive_process_record(struct receive_writer_arg *rwa, 2675286705Smav struct receive_record_arg *rrd) 2676286705Smav{ 2677286705Smav int err; 2678286705Smav 2679289362Smav /* Processing in order, therefore bytes_read should be increasing. */ 2680289362Smav ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read); 2681289362Smav rwa->bytes_read = rrd->bytes_read; 2682289362Smav 2683286705Smav switch (rrd->header.drr_type) { 2684286705Smav case DRR_OBJECT: 2685286705Smav { 2686286705Smav struct drr_object *drro = &rrd->header.drr_u.drr_object; 2687286705Smav err = receive_object(rwa, drro, rrd->payload); 2688286705Smav kmem_free(rrd->payload, rrd->payload_size); 2689286705Smav rrd->payload = NULL; 2690286705Smav return (err); 2691286705Smav } 2692286705Smav case DRR_FREEOBJECTS: 2693286705Smav { 2694286705Smav struct drr_freeobjects *drrfo = 2695286705Smav &rrd->header.drr_u.drr_freeobjects; 2696286705Smav return (receive_freeobjects(rwa, drrfo)); 2697286705Smav } 2698286705Smav case DRR_WRITE: 2699286705Smav { 2700286705Smav struct drr_write *drrw = &rrd->header.drr_u.drr_write; 2701286705Smav err = receive_write(rwa, drrw, rrd->write_buf); 2702286705Smav /* if receive_write() is successful, it consumes the arc_buf */ 2703286705Smav if (err != 0) 2704286705Smav dmu_return_arcbuf(rrd->write_buf); 2705286705Smav rrd->write_buf = NULL; 2706286705Smav rrd->payload = NULL; 2707286705Smav return (err); 2708286705Smav } 2709286705Smav case DRR_WRITE_BYREF: 2710286705Smav { 2711286705Smav struct drr_write_byref *drrwbr = 2712286705Smav &rrd->header.drr_u.drr_write_byref; 2713286705Smav return (receive_write_byref(rwa, drrwbr)); 2714286705Smav } 2715286705Smav case DRR_WRITE_EMBEDDED: 2716286705Smav { 2717286705Smav struct drr_write_embedded *drrwe = 2718286705Smav &rrd->header.drr_u.drr_write_embedded; 2719286705Smav err = receive_write_embedded(rwa, drrwe, rrd->payload); 2720286705Smav kmem_free(rrd->payload, rrd->payload_size); 2721286705Smav rrd->payload = NULL; 2722286705Smav return (err); 2723286705Smav } 2724286705Smav case DRR_FREE: 2725286705Smav { 2726286705Smav struct drr_free *drrf = &rrd->header.drr_u.drr_free; 2727286705Smav return (receive_free(rwa, drrf)); 2728286705Smav } 2729286705Smav case DRR_SPILL: 2730286705Smav { 2731286705Smav struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; 2732286705Smav err = receive_spill(rwa, drrs, rrd->payload); 2733286705Smav kmem_free(rrd->payload, rrd->payload_size); 2734286705Smav rrd->payload = NULL; 2735286705Smav return (err); 2736286705Smav } 2737286705Smav default: 2738286705Smav return (SET_ERROR(EINVAL)); 2739286705Smav } 2740286705Smav} 2741286705Smav 2742286705Smav/* 2743286705Smav * dmu_recv_stream's worker thread; pull records off the queue, and then call 2744286705Smav * receive_process_record When we're done, signal the main thread and exit. 2745286705Smav */ 2746286705Smavstatic void 2747286705Smavreceive_writer_thread(void *arg) 2748286705Smav{ 2749286705Smav struct receive_writer_arg *rwa = arg; 2750286705Smav struct receive_record_arg *rrd; 2751286705Smav for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; 2752286705Smav rrd = bqueue_dequeue(&rwa->q)) { 2753286705Smav /* 2754286705Smav * If there's an error, the main thread will stop putting things 2755286705Smav * on the queue, but we need to clear everything in it before we 2756286705Smav * can exit. 2757286705Smav */ 2758286705Smav if (rwa->err == 0) { 2759286705Smav rwa->err = receive_process_record(rwa, rrd); 2760286705Smav } else if (rrd->write_buf != NULL) { 2761286705Smav dmu_return_arcbuf(rrd->write_buf); 2762286705Smav rrd->write_buf = NULL; 2763286705Smav rrd->payload = NULL; 2764286705Smav } else if (rrd->payload != NULL) { 2765286705Smav kmem_free(rrd->payload, rrd->payload_size); 2766286705Smav rrd->payload = NULL; 2767286705Smav } 2768286705Smav kmem_free(rrd, sizeof (*rrd)); 2769286705Smav } 2770286705Smav kmem_free(rrd, sizeof (*rrd)); 2771286705Smav mutex_enter(&rwa->mutex); 2772286705Smav rwa->done = B_TRUE; 2773286705Smav cv_signal(&rwa->cv); 2774286705Smav mutex_exit(&rwa->mutex); 2775286705Smav thread_exit(); 2776286705Smav} 2777286705Smav 2778289362Smavstatic int 2779289362Smavresume_check(struct receive_arg *ra, nvlist_t *begin_nvl) 2780289362Smav{ 2781289362Smav uint64_t val; 2782289362Smav objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset; 2783289362Smav uint64_t dsobj = dmu_objset_id(ra->os); 2784289362Smav uint64_t resume_obj, resume_off; 2785289362Smav 2786289362Smav if (nvlist_lookup_uint64(begin_nvl, 2787289362Smav "resume_object", &resume_obj) != 0 || 2788289362Smav nvlist_lookup_uint64(begin_nvl, 2789289362Smav "resume_offset", &resume_off) != 0) { 2790289362Smav return (SET_ERROR(EINVAL)); 2791289362Smav } 2792289362Smav VERIFY0(zap_lookup(mos, dsobj, 2793289362Smav DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val)); 2794289362Smav if (resume_obj != val) 2795289362Smav return (SET_ERROR(EINVAL)); 2796289362Smav VERIFY0(zap_lookup(mos, dsobj, 2797289362Smav DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val)); 2798289362Smav if (resume_off != val) 2799289362Smav return (SET_ERROR(EINVAL)); 2800289362Smav 2801289362Smav return (0); 2802289362Smav} 2803289362Smav 2804286705Smav/* 2805286705Smav * Read in the stream's records, one by one, and apply them to the pool. There 2806286705Smav * are two threads involved; the thread that calls this function will spin up a 2807286705Smav * worker thread, read the records off the stream one by one, and issue 2808286705Smav * prefetches for any necessary indirect blocks. It will then push the records 2809286705Smav * onto an internal blocking queue. The worker thread will pull the records off 2810286705Smav * the queue, and actually write the data into the DMU. This way, the worker 2811286705Smav * thread doesn't have to wait for reads to complete, since everything it needs 2812286705Smav * (the indirect blocks) will be prefetched. 2813286705Smav * 2814185029Spjd * NB: callers *must* call dmu_recv_end() if this succeeds. 2815185029Spjd */ 2816168404Spjdint 2817219089Spjddmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp, 2818219089Spjd int cleanup_fd, uint64_t *action_handlep) 2819168404Spjd{ 2820286587Smav int err = 0; 2821286705Smav struct receive_arg ra = { 0 }; 2822286705Smav struct receive_writer_arg rwa = { 0 }; 2823219089Spjd int featureflags; 2824289362Smav nvlist_t *begin_nvl = NULL; 2825168404Spjd 2826248571Smm ra.byteswap = drc->drc_byteswap; 2827248571Smm ra.cksum = drc->drc_cksum; 2828219089Spjd ra.td = curthread; 2829185029Spjd ra.fp = fp; 2830185029Spjd ra.voff = *voffp; 2831289362Smav 2832289362Smav if (dsl_dataset_is_zapified(drc->drc_ds)) { 2833289362Smav (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset, 2834289362Smav drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES, 2835289362Smav sizeof (ra.bytes_read), 1, &ra.bytes_read); 2836289362Smav } 2837289362Smav 2838294815Smav objlist_create(&ra.ignore_objlist); 2839168404Spjd 2840185029Spjd /* these were verified in dmu_recv_begin */ 2841248571Smm ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, 2842219089Spjd DMU_SUBSTREAM); 2843248571Smm ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); 2844168404Spjd 2845168404Spjd /* 2846168404Spjd * Open the objset we are modifying. 2847168404Spjd */ 2848286587Smav VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra.os)); 2849168404Spjd 2850275782Sdelphij ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); 2851168404Spjd 2852219089Spjd featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); 2853219089Spjd 2854219089Spjd /* if this stream is dedup'ed, set up the avl tree for guid mapping */ 2855219089Spjd if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { 2856219089Spjd minor_t minor; 2857219089Spjd 2858219089Spjd if (cleanup_fd == -1) { 2859249195Smm ra.err = SET_ERROR(EBADF); 2860219089Spjd goto out; 2861219089Spjd } 2862219089Spjd ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); 2863248571Smm if (ra.err != 0) { 2864219089Spjd cleanup_fd = -1; 2865219089Spjd goto out; 2866219089Spjd } 2867219089Spjd 2868219089Spjd if (*action_handlep == 0) { 2869286705Smav rwa.guid_to_ds_map = 2870219089Spjd kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); 2871286705Smav avl_create(rwa.guid_to_ds_map, guid_compare, 2872219089Spjd sizeof (guid_map_entry_t), 2873219089Spjd offsetof(guid_map_entry_t, avlnode)); 2874286587Smav err = zfs_onexit_add_cb(minor, 2875286705Smav free_guid_map_onexit, rwa.guid_to_ds_map, 2876219089Spjd action_handlep); 2877248571Smm if (ra.err != 0) 2878219089Spjd goto out; 2879219089Spjd } else { 2880286587Smav err = zfs_onexit_cb_data(minor, *action_handlep, 2881286705Smav (void **)&rwa.guid_to_ds_map); 2882248571Smm if (ra.err != 0) 2883219089Spjd goto out; 2884219089Spjd } 2885221263Smm 2886286705Smav drc->drc_guid_to_ds_map = rwa.guid_to_ds_map; 2887219089Spjd } 2888219089Spjd 2889289362Smav uint32_t payloadlen = drc->drc_drr_begin->drr_payloadlen; 2890289362Smav void *payload = NULL; 2891289362Smav if (payloadlen != 0) 2892289362Smav payload = kmem_alloc(payloadlen, KM_SLEEP); 2893289362Smav 2894289362Smav err = receive_read_payload_and_next_header(&ra, payloadlen, payload); 2895289362Smav if (err != 0) { 2896289362Smav if (payloadlen != 0) 2897289362Smav kmem_free(payload, payloadlen); 2898286587Smav goto out; 2899289362Smav } 2900289362Smav if (payloadlen != 0) { 2901289362Smav err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP); 2902289362Smav kmem_free(payload, payloadlen); 2903289362Smav if (err != 0) 2904289362Smav goto out; 2905289362Smav } 2906286587Smav 2907289362Smav if (featureflags & DMU_BACKUP_FEATURE_RESUMING) { 2908289362Smav err = resume_check(&ra, begin_nvl); 2909289362Smav if (err != 0) 2910289362Smav goto out; 2911289362Smav } 2912289362Smav 2913286705Smav (void) bqueue_init(&rwa.q, zfs_recv_queue_length, 2914286705Smav offsetof(struct receive_record_arg, node)); 2915286705Smav cv_init(&rwa.cv, NULL, CV_DEFAULT, NULL); 2916286705Smav mutex_init(&rwa.mutex, NULL, MUTEX_DEFAULT, NULL); 2917286705Smav rwa.os = ra.os; 2918286705Smav rwa.byteswap = drc->drc_byteswap; 2919289362Smav rwa.resumable = drc->drc_resumable; 2920286705Smav 2921287280Sdelphij (void) thread_create(NULL, 0, receive_writer_thread, &rwa, 0, &p0, 2922286705Smav TS_RUN, minclsyspri); 2923286705Smav /* 2924286705Smav * We're reading rwa.err without locks, which is safe since we are the 2925286705Smav * only reader, and the worker thread is the only writer. It's ok if we 2926286705Smav * miss a write for an iteration or two of the loop, since the writer 2927286705Smav * thread will keep freeing records we send it until we send it an eos 2928286705Smav * marker. 2929286705Smav * 2930286705Smav * We can leave this loop in 3 ways: First, if rwa.err is 2931286705Smav * non-zero. In that case, the writer thread will free the rrd we just 2932286705Smav * pushed. Second, if we're interrupted; in that case, either it's the 2933286705Smav * first loop and ra.rrd was never allocated, or it's later, and ra.rrd 2934286705Smav * has been handed off to the writer thread who will free it. Finally, 2935286705Smav * if receive_read_record fails or we're at the end of the stream, then 2936286705Smav * we free ra.rrd and exit. 2937286705Smav */ 2938286705Smav while (rwa.err == 0) { 2939185029Spjd if (issig(JUSTLOOKING) && issig(FORREAL)) { 2940286587Smav err = SET_ERROR(EINTR); 2941286587Smav break; 2942168404Spjd } 2943168404Spjd 2944286705Smav ASSERT3P(ra.rrd, ==, NULL); 2945286705Smav ra.rrd = ra.next_rrd; 2946286705Smav ra.next_rrd = NULL; 2947286705Smav /* Allocates and loads header into ra.next_rrd */ 2948286705Smav err = receive_read_record(&ra); 2949168404Spjd 2950286705Smav if (ra.rrd->header.drr_type == DRR_END || err != 0) { 2951286705Smav kmem_free(ra.rrd, sizeof (*ra.rrd)); 2952286705Smav ra.rrd = NULL; 2953168404Spjd break; 2954286705Smav } 2955286705Smav 2956286705Smav bqueue_enqueue(&rwa.q, ra.rrd, 2957286705Smav sizeof (struct receive_record_arg) + ra.rrd->payload_size); 2958286705Smav ra.rrd = NULL; 2959168404Spjd } 2960286705Smav if (ra.next_rrd == NULL) 2961286705Smav ra.next_rrd = kmem_zalloc(sizeof (*ra.next_rrd), KM_SLEEP); 2962286705Smav ra.next_rrd->eos_marker = B_TRUE; 2963286705Smav bqueue_enqueue(&rwa.q, ra.next_rrd, 1); 2964168404Spjd 2965286705Smav mutex_enter(&rwa.mutex); 2966286705Smav while (!rwa.done) { 2967286705Smav cv_wait(&rwa.cv, &rwa.mutex); 2968286705Smav } 2969286705Smav mutex_exit(&rwa.mutex); 2970286705Smav 2971286705Smav cv_destroy(&rwa.cv); 2972286705Smav mutex_destroy(&rwa.mutex); 2973286705Smav bqueue_destroy(&rwa.q); 2974286705Smav if (err == 0) 2975286705Smav err = rwa.err; 2976286705Smav 2977168404Spjdout: 2978289362Smav nvlist_free(begin_nvl); 2979219089Spjd if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) 2980219089Spjd zfs_onexit_fd_rele(cleanup_fd); 2981168404Spjd 2982286587Smav if (err != 0) { 2983168404Spjd /* 2984289362Smav * Clean up references. If receive is not resumable, 2985289362Smav * destroy what we created, so we don't leave it in 2986289362Smav * the inconsistent state. 2987168404Spjd */ 2988248571Smm dmu_recv_cleanup_ds(drc); 2989168404Spjd } 2990168404Spjd 2991185029Spjd *voffp = ra.voff; 2992294815Smav objlist_destroy(&ra.ignore_objlist); 2993286587Smav return (err); 2994168404Spjd} 2995185029Spjd 2996185029Spjdstatic int 2997248571Smmdmu_recv_end_check(void *arg, dmu_tx_t *tx) 2998185029Spjd{ 2999248571Smm dmu_recv_cookie_t *drc = arg; 3000248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 3001248571Smm int error; 3002185029Spjd 3003248571Smm ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); 3004248571Smm 3005248571Smm if (!drc->drc_newfs) { 3006248571Smm dsl_dataset_t *origin_head; 3007248571Smm 3008248571Smm error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); 3009248571Smm if (error != 0) 3010248571Smm return (error); 3011253820Sdelphij if (drc->drc_force) { 3012253820Sdelphij /* 3013253820Sdelphij * We will destroy any snapshots in tofs (i.e. before 3014253820Sdelphij * origin_head) that are after the origin (which is 3015253820Sdelphij * the snap before drc_ds, because drc_ds can not 3016253820Sdelphij * have any snaps of its own). 3017253820Sdelphij */ 3018275782Sdelphij uint64_t obj; 3019275782Sdelphij 3020275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3021275782Sdelphij while (obj != 3022275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 3023253820Sdelphij dsl_dataset_t *snap; 3024253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 3025253820Sdelphij &snap); 3026253820Sdelphij if (error != 0) 3027282473Savg break; 3028253820Sdelphij if (snap->ds_dir != origin_head->ds_dir) 3029253820Sdelphij error = SET_ERROR(EINVAL); 3030253820Sdelphij if (error == 0) { 3031253820Sdelphij error = dsl_destroy_snapshot_check_impl( 3032253820Sdelphij snap, B_FALSE); 3033253820Sdelphij } 3034275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3035253820Sdelphij dsl_dataset_rele(snap, FTAG); 3036253820Sdelphij if (error != 0) 3037282473Savg break; 3038253820Sdelphij } 3039282473Savg if (error != 0) { 3040282473Savg dsl_dataset_rele(origin_head, FTAG); 3041282473Savg return (error); 3042282473Savg } 3043253820Sdelphij } 3044248571Smm error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, 3045253816Sdelphij origin_head, drc->drc_force, drc->drc_owner, tx); 3046248571Smm if (error != 0) { 3047248571Smm dsl_dataset_rele(origin_head, FTAG); 3048248571Smm return (error); 3049248571Smm } 3050248571Smm error = dsl_dataset_snapshot_check_impl(origin_head, 3051264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 3052248571Smm dsl_dataset_rele(origin_head, FTAG); 3053248571Smm if (error != 0) 3054248571Smm return (error); 3055248571Smm 3056248571Smm error = dsl_destroy_head_check_impl(drc->drc_ds, 1); 3057248571Smm } else { 3058248571Smm error = dsl_dataset_snapshot_check_impl(drc->drc_ds, 3059264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 3060248571Smm } 3061248571Smm return (error); 3062185029Spjd} 3063185029Spjd 3064185029Spjdstatic void 3065248571Smmdmu_recv_end_sync(void *arg, dmu_tx_t *tx) 3066185029Spjd{ 3067248571Smm dmu_recv_cookie_t *drc = arg; 3068248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 3069185029Spjd 3070248571Smm spa_history_log_internal_ds(drc->drc_ds, "finish receiving", 3071248571Smm tx, "snap=%s", drc->drc_tosnap); 3072185029Spjd 3073248571Smm if (!drc->drc_newfs) { 3074248571Smm dsl_dataset_t *origin_head; 3075185029Spjd 3076248571Smm VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, 3077248571Smm &origin_head)); 3078253820Sdelphij 3079253820Sdelphij if (drc->drc_force) { 3080253820Sdelphij /* 3081253820Sdelphij * Destroy any snapshots of drc_tofs (origin_head) 3082253820Sdelphij * after the origin (the snap before drc_ds). 3083253820Sdelphij */ 3084275782Sdelphij uint64_t obj; 3085275782Sdelphij 3086275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3087275782Sdelphij while (obj != 3088275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 3089253820Sdelphij dsl_dataset_t *snap; 3090253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, 3091253820Sdelphij &snap)); 3092253820Sdelphij ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); 3093275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3094253820Sdelphij dsl_destroy_snapshot_sync_impl(snap, 3095253820Sdelphij B_FALSE, tx); 3096253820Sdelphij dsl_dataset_rele(snap, FTAG); 3097253820Sdelphij } 3098253820Sdelphij } 3099253820Sdelphij VERIFY3P(drc->drc_ds->ds_prev, ==, 3100253820Sdelphij origin_head->ds_prev); 3101253820Sdelphij 3102248571Smm dsl_dataset_clone_swap_sync_impl(drc->drc_ds, 3103248571Smm origin_head, tx); 3104248571Smm dsl_dataset_snapshot_sync_impl(origin_head, 3105248571Smm drc->drc_tosnap, tx); 3106248571Smm 3107248571Smm /* set snapshot's creation time and guid */ 3108248571Smm dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); 3109275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = 3110248571Smm drc->drc_drrb->drr_creation_time; 3111275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_guid = 3112248571Smm drc->drc_drrb->drr_toguid; 3113275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= 3114248571Smm ~DS_FLAG_INCONSISTENT; 3115248571Smm 3116248571Smm dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 3117275782Sdelphij dsl_dataset_phys(origin_head)->ds_flags &= 3118275782Sdelphij ~DS_FLAG_INCONSISTENT; 3119248571Smm 3120307288Smav drc->drc_newsnapobj = 3121307288Smav dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3122307288Smav 3123248571Smm dsl_dataset_rele(origin_head, FTAG); 3124248571Smm dsl_destroy_head_sync_impl(drc->drc_ds, tx); 3125253816Sdelphij 3126253816Sdelphij if (drc->drc_owner != NULL) 3127253816Sdelphij VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); 3128248571Smm } else { 3129248571Smm dsl_dataset_t *ds = drc->drc_ds; 3130248571Smm 3131248571Smm dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); 3132248571Smm 3133248571Smm /* set snapshot's creation time and guid */ 3134248571Smm dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 3135275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_creation_time = 3136248571Smm drc->drc_drrb->drr_creation_time; 3137275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_guid = 3138275782Sdelphij drc->drc_drrb->drr_toguid; 3139275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_flags &= 3140275782Sdelphij ~DS_FLAG_INCONSISTENT; 3141248571Smm 3142248571Smm dmu_buf_will_dirty(ds->ds_dbuf, tx); 3143275782Sdelphij dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 3144289362Smav if (dsl_dataset_has_resume_receive_state(ds)) { 3145289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3146289362Smav DS_FIELD_RESUME_FROMGUID, tx); 3147289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3148289362Smav DS_FIELD_RESUME_OBJECT, tx); 3149289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3150289362Smav DS_FIELD_RESUME_OFFSET, tx); 3151289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3152289362Smav DS_FIELD_RESUME_BYTES, tx); 3153289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3154289362Smav DS_FIELD_RESUME_TOGUID, tx); 3155289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3156289362Smav DS_FIELD_RESUME_TONAME, tx); 3157289362Smav } 3158307288Smav drc->drc_newsnapobj = 3159307288Smav dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; 3160248571Smm } 3161248571Smm /* 3162248571Smm * Release the hold from dmu_recv_begin. This must be done before 3163248571Smm * we return to open context, so that when we free the dataset's dnode, 3164248571Smm * we can evict its bonus buffer. 3165248571Smm */ 3166248571Smm dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 3167248571Smm drc->drc_ds = NULL; 3168185029Spjd} 3169185029Spjd 3170219089Spjdstatic int 3171248571Smmadd_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) 3172221263Smm{ 3173248571Smm dsl_pool_t *dp; 3174221263Smm dsl_dataset_t *snapds; 3175221263Smm guid_map_entry_t *gmep; 3176221263Smm int err; 3177221263Smm 3178221263Smm ASSERT(guid_map != NULL); 3179221263Smm 3180248571Smm err = dsl_pool_hold(name, FTAG, &dp); 3181248571Smm if (err != 0) 3182248571Smm return (err); 3183249356Smm gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); 3184249196Smm err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); 3185221263Smm if (err == 0) { 3186275782Sdelphij gmep->guid = dsl_dataset_phys(snapds)->ds_guid; 3187221263Smm gmep->gme_ds = snapds; 3188221263Smm avl_add(guid_map, gmep); 3189248571Smm dsl_dataset_long_hold(snapds, gmep); 3190249196Smm } else 3191249356Smm kmem_free(gmep, sizeof (*gmep)); 3192221263Smm 3193248571Smm dsl_pool_rele(dp, FTAG); 3194221263Smm return (err); 3195221263Smm} 3196221263Smm 3197248571Smmstatic int dmu_recv_end_modified_blocks = 3; 3198248571Smm 3199221263Smmstatic int 3200219089Spjddmu_recv_existing_end(dmu_recv_cookie_t *drc) 3201185029Spjd{ 3202248571Smm#ifdef _KERNEL 3203248571Smm /* 3204248571Smm * We will be destroying the ds; make sure its origin is unmounted if 3205248571Smm * necessary. 3206248571Smm */ 3207307108Smav char name[ZFS_MAX_DATASET_NAME_LEN]; 3208248571Smm dsl_dataset_name(drc->drc_ds, name); 3209248571Smm zfs_destroy_unmount_origin(name); 3210248571Smm#endif 3211185029Spjd 3212307288Smav return (dsl_sync_task(drc->drc_tofs, 3213248571Smm dmu_recv_end_check, dmu_recv_end_sync, drc, 3214307288Smav dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); 3215185029Spjd} 3216219089Spjd 3217219089Spjdstatic int 3218219089Spjddmu_recv_new_end(dmu_recv_cookie_t *drc) 3219219089Spjd{ 3220307288Smav return (dsl_sync_task(drc->drc_tofs, 3221307288Smav dmu_recv_end_check, dmu_recv_end_sync, drc, 3222307288Smav dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); 3223307288Smav} 3224307288Smav 3225307288Smavint 3226307288Smavdmu_recv_end(dmu_recv_cookie_t *drc, void *owner) 3227307288Smav{ 3228248571Smm int error; 3229219089Spjd 3230307288Smav drc->drc_owner = owner; 3231219089Spjd 3232307288Smav if (drc->drc_newfs) 3233307288Smav error = dmu_recv_new_end(drc); 3234307288Smav else 3235307288Smav error = dmu_recv_existing_end(drc); 3236307288Smav 3237248571Smm if (error != 0) { 3238248571Smm dmu_recv_cleanup_ds(drc); 3239248571Smm } else if (drc->drc_guid_to_ds_map != NULL) { 3240248571Smm (void) add_ds_to_guidmap(drc->drc_tofs, 3241248571Smm drc->drc_guid_to_ds_map, 3242248571Smm drc->drc_newsnapobj); 3243219089Spjd } 3244248571Smm return (error); 3245219089Spjd} 3246219089Spjd 3247253821Sdelphij/* 3248253821Sdelphij * Return TRUE if this objset is currently being received into. 3249253821Sdelphij */ 3250253821Sdelphijboolean_t 3251253821Sdelphijdmu_objset_is_receiving(objset_t *os) 3252253821Sdelphij{ 3253253821Sdelphij return (os->os_dsl_dataset != NULL && 3254253821Sdelphij os->os_dsl_dataset->ds_owner == dmu_recv_tag); 3255253821Sdelphij} 3256