dmu_send.c revision 307108
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); 163286587Smav if (dsp->dsa_drr->drr_type != DRR_BEGIN) { 164286587Smav ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u. 165286587Smav drr_checksum.drr_checksum)); 166286587Smav dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc; 167286587Smav } 168286587Smav fletcher_4_incremental_native(&dsp->dsa_drr-> 169286587Smav drr_u.drr_checksum.drr_checksum, 170286587Smav sizeof (zio_cksum_t), &dsp->dsa_zc); 171286587Smav if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) 172286587Smav return (SET_ERROR(EINTR)); 173286587Smav if (payload_len != 0) { 174286587Smav fletcher_4_incremental_native(payload, payload_len, 175286587Smav &dsp->dsa_zc); 176286587Smav if (dump_bytes(dsp, payload, payload_len) != 0) 177286587Smav return (SET_ERROR(EINTR)); 178286587Smav } 179286587Smav return (0); 180286587Smav} 181286587Smav 182294815Smav/* 183294815Smav * Fill in the drr_free struct, or perform aggregation if the previous record is 184294815Smav * also a free record, and the two are adjacent. 185294815Smav * 186294815Smav * Note that we send free records even for a full send, because we want to be 187294815Smav * able to receive a full send as a clone, which requires a list of all the free 188294815Smav * and freeobject records that were generated on the source. 189294815Smav */ 190286587Smavstatic int 191235222Smmdump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 192168404Spjd uint64_t length) 193168404Spjd{ 194235222Smm struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); 195219089Spjd 196253821Sdelphij /* 197253821Sdelphij * When we receive a free record, dbuf_free_range() assumes 198253821Sdelphij * that the receiving system doesn't have any dbufs in the range 199253821Sdelphij * being freed. This is always true because there is a one-record 200253821Sdelphij * constraint: we only send one WRITE record for any given 201289362Smav * object,offset. We know that the one-record constraint is 202253821Sdelphij * true because we always send data in increasing order by 203253821Sdelphij * object,offset. 204253821Sdelphij * 205253821Sdelphij * If the increasing-order constraint ever changes, we should find 206253821Sdelphij * another way to assert that the one-record constraint is still 207253821Sdelphij * satisfied. 208253821Sdelphij */ 209253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 210253821Sdelphij (object == dsp->dsa_last_data_object && 211253821Sdelphij offset > dsp->dsa_last_data_offset)); 212253821Sdelphij 213237458Smm if (length != -1ULL && offset + length < offset) 214237458Smm length = -1ULL; 215237458Smm 216219089Spjd /* 217219089Spjd * If there is a pending op, but it's not PENDING_FREE, push it out, 218219089Spjd * since free block aggregation can only be done for blocks of the 219219089Spjd * same type (i.e., DRR_FREE records can only be aggregated with 220219089Spjd * other DRR_FREE records. DRR_FREEOBJECTS records can only be 221219089Spjd * aggregated with other DRR_FREEOBJECTS records. 222219089Spjd */ 223235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 224235222Smm dsp->dsa_pending_op != PENDING_FREE) { 225286587Smav if (dump_record(dsp, NULL, 0) != 0) 226249195Smm return (SET_ERROR(EINTR)); 227235222Smm dsp->dsa_pending_op = PENDING_NONE; 228219089Spjd } 229219089Spjd 230235222Smm if (dsp->dsa_pending_op == PENDING_FREE) { 231219089Spjd /* 232219089Spjd * There should never be a PENDING_FREE if length is -1 233219089Spjd * (because dump_dnode is the only place where this 234219089Spjd * function is called with a -1, and only after flushing 235219089Spjd * any pending record). 236219089Spjd */ 237219089Spjd ASSERT(length != -1ULL); 238219089Spjd /* 239219089Spjd * Check to see whether this free block can be aggregated 240219089Spjd * with pending one. 241219089Spjd */ 242219089Spjd if (drrf->drr_object == object && drrf->drr_offset + 243219089Spjd drrf->drr_length == offset) { 244219089Spjd drrf->drr_length += length; 245219089Spjd return (0); 246219089Spjd } else { 247219089Spjd /* not a continuation. Push out pending record */ 248286587Smav if (dump_record(dsp, NULL, 0) != 0) 249249195Smm return (SET_ERROR(EINTR)); 250235222Smm dsp->dsa_pending_op = PENDING_NONE; 251219089Spjd } 252219089Spjd } 253219089Spjd /* create a FREE record and make it pending */ 254235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 255235222Smm dsp->dsa_drr->drr_type = DRR_FREE; 256219089Spjd drrf->drr_object = object; 257219089Spjd drrf->drr_offset = offset; 258219089Spjd drrf->drr_length = length; 259235222Smm drrf->drr_toguid = dsp->dsa_toguid; 260219089Spjd if (length == -1ULL) { 261286587Smav if (dump_record(dsp, NULL, 0) != 0) 262249195Smm return (SET_ERROR(EINTR)); 263219089Spjd } else { 264235222Smm dsp->dsa_pending_op = PENDING_FREE; 265219089Spjd } 266168404Spjd 267168404Spjd return (0); 268168404Spjd} 269168404Spjd 270168404Spjdstatic int 271268075Sdelphijdump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, 272219089Spjd uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) 273168404Spjd{ 274235222Smm struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); 275219089Spjd 276253821Sdelphij /* 277253821Sdelphij * We send data in increasing object, offset order. 278253821Sdelphij * See comment in dump_free() for details. 279253821Sdelphij */ 280253821Sdelphij ASSERT(object > dsp->dsa_last_data_object || 281253821Sdelphij (object == dsp->dsa_last_data_object && 282253821Sdelphij offset > dsp->dsa_last_data_offset)); 283253821Sdelphij dsp->dsa_last_data_object = object; 284253821Sdelphij dsp->dsa_last_data_offset = offset + blksz - 1; 285219089Spjd 286219089Spjd /* 287219089Spjd * If there is any kind of pending aggregation (currently either 288219089Spjd * a grouping of free objects or free blocks), push it out to 289219089Spjd * the stream, since aggregation can't be done across operations 290219089Spjd * of different types. 291219089Spjd */ 292235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 293286587Smav if (dump_record(dsp, NULL, 0) != 0) 294249195Smm return (SET_ERROR(EINTR)); 295235222Smm dsp->dsa_pending_op = PENDING_NONE; 296219089Spjd } 297286587Smav /* write a WRITE record */ 298235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 299235222Smm dsp->dsa_drr->drr_type = DRR_WRITE; 300219089Spjd drrw->drr_object = object; 301219089Spjd drrw->drr_type = type; 302219089Spjd drrw->drr_offset = offset; 303219089Spjd drrw->drr_length = blksz; 304235222Smm drrw->drr_toguid = dsp->dsa_toguid; 305274337Sdelphij if (bp == NULL || BP_IS_EMBEDDED(bp)) { 306268075Sdelphij /* 307274337Sdelphij * There's no pre-computed checksum for partial-block 308274337Sdelphij * writes or embedded BP's, so (like 309274337Sdelphij * fletcher4-checkummed blocks) userland will have to 310274337Sdelphij * compute a dedup-capable checksum itself. 311268075Sdelphij */ 312268075Sdelphij drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; 313268075Sdelphij } else { 314268075Sdelphij drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); 315289422Smav if (zio_checksum_table[drrw->drr_checksumtype].ci_flags & 316289422Smav ZCHECKSUM_FLAG_DEDUP) 317268075Sdelphij drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; 318268075Sdelphij DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); 319268075Sdelphij DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); 320268075Sdelphij DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); 321268075Sdelphij drrw->drr_key.ddk_cksum = bp->blk_cksum; 322268075Sdelphij } 323168404Spjd 324286587Smav if (dump_record(dsp, data, blksz) != 0) 325249195Smm return (SET_ERROR(EINTR)); 326219089Spjd return (0); 327219089Spjd} 328219089Spjd 329219089Spjdstatic int 330268075Sdelphijdump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, 331268075Sdelphij int blksz, const blkptr_t *bp) 332268075Sdelphij{ 333268075Sdelphij char buf[BPE_PAYLOAD_SIZE]; 334268075Sdelphij struct drr_write_embedded *drrw = 335268075Sdelphij &(dsp->dsa_drr->drr_u.drr_write_embedded); 336268075Sdelphij 337268075Sdelphij if (dsp->dsa_pending_op != PENDING_NONE) { 338286587Smav if (dump_record(dsp, NULL, 0) != 0) 339268075Sdelphij return (EINTR); 340268075Sdelphij dsp->dsa_pending_op = PENDING_NONE; 341268075Sdelphij } 342268075Sdelphij 343268075Sdelphij ASSERT(BP_IS_EMBEDDED(bp)); 344268075Sdelphij 345268075Sdelphij bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 346268075Sdelphij dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; 347268075Sdelphij drrw->drr_object = object; 348268075Sdelphij drrw->drr_offset = offset; 349268075Sdelphij drrw->drr_length = blksz; 350268075Sdelphij drrw->drr_toguid = dsp->dsa_toguid; 351268075Sdelphij drrw->drr_compression = BP_GET_COMPRESS(bp); 352268075Sdelphij drrw->drr_etype = BPE_GET_ETYPE(bp); 353268075Sdelphij drrw->drr_lsize = BPE_GET_LSIZE(bp); 354268075Sdelphij drrw->drr_psize = BPE_GET_PSIZE(bp); 355268075Sdelphij 356268075Sdelphij decode_embedded_bp_compressed(bp, buf); 357268075Sdelphij 358286587Smav if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) 359268075Sdelphij return (EINTR); 360268075Sdelphij return (0); 361268075Sdelphij} 362268075Sdelphij 363268075Sdelphijstatic int 364235222Smmdump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) 365219089Spjd{ 366235222Smm struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); 367219089Spjd 368235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 369286587Smav if (dump_record(dsp, NULL, 0) != 0) 370249195Smm return (SET_ERROR(EINTR)); 371235222Smm dsp->dsa_pending_op = PENDING_NONE; 372219089Spjd } 373219089Spjd 374219089Spjd /* write a SPILL record */ 375235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 376235222Smm dsp->dsa_drr->drr_type = DRR_SPILL; 377219089Spjd drrs->drr_object = object; 378219089Spjd drrs->drr_length = blksz; 379235222Smm drrs->drr_toguid = dsp->dsa_toguid; 380219089Spjd 381286587Smav if (dump_record(dsp, data, blksz) != 0) 382249195Smm return (SET_ERROR(EINTR)); 383168404Spjd return (0); 384168404Spjd} 385168404Spjd 386168404Spjdstatic int 387235222Smmdump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) 388168404Spjd{ 389235222Smm struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); 390219089Spjd 391219089Spjd /* 392219089Spjd * If there is a pending op, but it's not PENDING_FREEOBJECTS, 393219089Spjd * push it out, since free block aggregation can only be done for 394219089Spjd * blocks of the same type (i.e., DRR_FREE records can only be 395219089Spjd * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records 396219089Spjd * can only be aggregated with other DRR_FREEOBJECTS records. 397219089Spjd */ 398235222Smm if (dsp->dsa_pending_op != PENDING_NONE && 399235222Smm dsp->dsa_pending_op != PENDING_FREEOBJECTS) { 400286587Smav if (dump_record(dsp, NULL, 0) != 0) 401249195Smm return (SET_ERROR(EINTR)); 402235222Smm dsp->dsa_pending_op = PENDING_NONE; 403219089Spjd } 404235222Smm if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { 405219089Spjd /* 406219089Spjd * See whether this free object array can be aggregated 407219089Spjd * with pending one 408219089Spjd */ 409219089Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { 410219089Spjd drrfo->drr_numobjs += numobjs; 411219089Spjd return (0); 412219089Spjd } else { 413219089Spjd /* can't be aggregated. Push out pending record */ 414286587Smav if (dump_record(dsp, NULL, 0) != 0) 415249195Smm return (SET_ERROR(EINTR)); 416235222Smm dsp->dsa_pending_op = PENDING_NONE; 417219089Spjd } 418219089Spjd } 419219089Spjd 420168404Spjd /* write a FREEOBJECTS record */ 421235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 422235222Smm dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; 423219089Spjd drrfo->drr_firstobj = firstobj; 424219089Spjd drrfo->drr_numobjs = numobjs; 425235222Smm drrfo->drr_toguid = dsp->dsa_toguid; 426168404Spjd 427235222Smm dsp->dsa_pending_op = PENDING_FREEOBJECTS; 428219089Spjd 429168404Spjd return (0); 430168404Spjd} 431168404Spjd 432168404Spjdstatic int 433235222Smmdump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) 434168404Spjd{ 435235222Smm struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); 436219089Spjd 437289362Smav if (object < dsp->dsa_resume_object) { 438289362Smav /* 439289362Smav * Note: when resuming, we will visit all the dnodes in 440289362Smav * the block of dnodes that we are resuming from. In 441289362Smav * this case it's unnecessary to send the dnodes prior to 442289362Smav * the one we are resuming from. We should be at most one 443289362Smav * block's worth of dnodes behind the resume point. 444289362Smav */ 445289362Smav ASSERT3U(dsp->dsa_resume_object - object, <, 446289362Smav 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT)); 447289362Smav return (0); 448289362Smav } 449289362Smav 450168404Spjd if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) 451235222Smm return (dump_freeobjects(dsp, object, 1)); 452168404Spjd 453235222Smm if (dsp->dsa_pending_op != PENDING_NONE) { 454286587Smav if (dump_record(dsp, NULL, 0) != 0) 455249195Smm return (SET_ERROR(EINTR)); 456235222Smm dsp->dsa_pending_op = PENDING_NONE; 457219089Spjd } 458219089Spjd 459168404Spjd /* write an OBJECT record */ 460235222Smm bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); 461235222Smm dsp->dsa_drr->drr_type = DRR_OBJECT; 462219089Spjd drro->drr_object = object; 463219089Spjd drro->drr_type = dnp->dn_type; 464219089Spjd drro->drr_bonustype = dnp->dn_bonustype; 465219089Spjd drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 466219089Spjd drro->drr_bonuslen = dnp->dn_bonuslen; 467219089Spjd drro->drr_checksumtype = dnp->dn_checksum; 468219089Spjd drro->drr_compress = dnp->dn_compress; 469235222Smm drro->drr_toguid = dsp->dsa_toguid; 470168404Spjd 471274337Sdelphij if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 472274337Sdelphij drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) 473274337Sdelphij drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; 474274337Sdelphij 475286587Smav if (dump_record(dsp, DN_BONUS(dnp), 476286587Smav P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) { 477249195Smm return (SET_ERROR(EINTR)); 478286587Smav } 479168404Spjd 480253821Sdelphij /* Free anything past the end of the file. */ 481235222Smm if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * 482253821Sdelphij (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) 483249195Smm return (SET_ERROR(EINTR)); 484248571Smm if (dsp->dsa_err != 0) 485249195Smm return (SET_ERROR(EINTR)); 486168404Spjd return (0); 487168404Spjd} 488168404Spjd 489268075Sdelphijstatic boolean_t 490268075Sdelphijbackup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) 491268075Sdelphij{ 492268075Sdelphij if (!BP_IS_EMBEDDED(bp)) 493268075Sdelphij return (B_FALSE); 494268075Sdelphij 495268075Sdelphij /* 496268075Sdelphij * Compression function must be legacy, or explicitly enabled. 497268075Sdelphij */ 498268075Sdelphij if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && 499268075Sdelphij !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4))) 500268075Sdelphij return (B_FALSE); 501268075Sdelphij 502268075Sdelphij /* 503268075Sdelphij * Embed type must be explicitly enabled. 504268075Sdelphij */ 505268075Sdelphij switch (BPE_GET_ETYPE(bp)) { 506268075Sdelphij case BP_EMBEDDED_TYPE_DATA: 507268075Sdelphij if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) 508268075Sdelphij return (B_TRUE); 509268075Sdelphij break; 510268075Sdelphij default: 511268075Sdelphij return (B_FALSE); 512268075Sdelphij } 513268075Sdelphij return (B_FALSE); 514268075Sdelphij} 515268075Sdelphij 516286705Smav/* 517286705Smav * This is the callback function to traverse_dataset that acts as the worker 518286705Smav * thread for dmu_send_impl. 519286705Smav */ 520286705Smav/*ARGSUSED*/ 521286705Smavstatic int 522286705Smavsend_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 523286705Smav const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg) 524286705Smav{ 525286705Smav struct send_thread_arg *sta = arg; 526286705Smav struct send_block_record *record; 527286705Smav uint64_t record_size; 528286705Smav int err = 0; 529168404Spjd 530289362Smav ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || 531289362Smav zb->zb_object >= sta->resume.zb_object); 532289362Smav 533286705Smav if (sta->cancel) 534286705Smav return (SET_ERROR(EINTR)); 535286705Smav 536286705Smav if (bp == NULL) { 537286705Smav ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL); 538286705Smav return (0); 539286705Smav } else if (zb->zb_level < 0) { 540286705Smav return (0); 541286705Smav } 542286705Smav 543286705Smav record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP); 544286705Smav record->eos_marker = B_FALSE; 545286705Smav record->bp = *bp; 546286705Smav record->zb = *zb; 547286705Smav record->indblkshift = dnp->dn_indblkshift; 548286705Smav record->datablkszsec = dnp->dn_datablkszsec; 549286705Smav record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; 550286705Smav bqueue_enqueue(&sta->q, record, record_size); 551286705Smav 552286705Smav return (err); 553286705Smav} 554286705Smav 555286705Smav/* 556286705Smav * This function kicks off the traverse_dataset. It also handles setting the 557286705Smav * error code of the thread in case something goes wrong, and pushes the End of 558286705Smav * Stream record when the traverse_dataset call has finished. If there is no 559286705Smav * dataset to traverse, the thread immediately pushes End of Stream marker. 560286705Smav */ 561286705Smavstatic void 562286705Smavsend_traverse_thread(void *arg) 563286705Smav{ 564286705Smav struct send_thread_arg *st_arg = arg; 565286705Smav int err; 566286705Smav struct send_block_record *data; 567286705Smav 568286705Smav if (st_arg->ds != NULL) { 569289362Smav err = traverse_dataset_resume(st_arg->ds, 570289362Smav st_arg->fromtxg, &st_arg->resume, 571289362Smav st_arg->flags, send_cb, st_arg); 572289362Smav 573286705Smav if (err != EINTR) 574286705Smav st_arg->error_code = err; 575286705Smav } 576286705Smav data = kmem_zalloc(sizeof (*data), KM_SLEEP); 577286705Smav data->eos_marker = B_TRUE; 578286705Smav bqueue_enqueue(&st_arg->q, data, 1); 579286705Smav thread_exit(); 580286705Smav} 581286705Smav 582286705Smav/* 583286705Smav * This function actually handles figuring out what kind of record needs to be 584286705Smav * dumped, reading the data (which has hopefully been prefetched), and calling 585286705Smav * the appropriate helper function. 586286705Smav */ 587168404Spjdstatic int 588286705Smavdo_dump(dmu_sendarg_t *dsa, struct send_block_record *data) 589168404Spjd{ 590286705Smav dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os); 591286705Smav const blkptr_t *bp = &data->bp; 592286705Smav const zbookmark_phys_t *zb = &data->zb; 593286705Smav uint8_t indblkshift = data->indblkshift; 594286705Smav uint16_t dblkszsec = data->datablkszsec; 595286705Smav spa_t *spa = ds->ds_dir->dd_pool->dp_spa; 596168404Spjd dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; 597168404Spjd int err = 0; 598168404Spjd 599286705Smav ASSERT3U(zb->zb_level, >=, 0); 600168404Spjd 601289362Smav ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || 602289362Smav zb->zb_object >= dsa->dsa_resume_object); 603289362Smav 604219089Spjd if (zb->zb_object != DMU_META_DNODE_OBJECT && 605219089Spjd DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { 606209962Smm return (0); 607260150Sdelphij } else if (BP_IS_HOLE(bp) && 608260150Sdelphij zb->zb_object == DMU_META_DNODE_OBJECT) { 609286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 610208047Smm uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; 611286705Smav err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT); 612260150Sdelphij } else if (BP_IS_HOLE(bp)) { 613286705Smav uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); 614286705Smav uint64_t offset = zb->zb_blkid * span; 615286705Smav err = dump_free(dsa, zb->zb_object, offset, span); 616208047Smm } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { 617208047Smm return (0); 618208047Smm } else if (type == DMU_OT_DNODE) { 619168404Spjd int blksz = BP_GET_LSIZE(bp); 620275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 621208047Smm arc_buf_t *abuf; 622168404Spjd 623286705Smav ASSERT0(zb->zb_level); 624286705Smav 625246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 626246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 627246666Smm &aflags, zb) != 0) 628249195Smm return (SET_ERROR(EIO)); 629208047Smm 630286705Smav dnode_phys_t *blk = abuf->b_data; 631286705Smav uint64_t dnobj = zb->zb_blkid * (blksz >> DNODE_SHIFT); 632286705Smav for (int i = 0; i < blksz >> DNODE_SHIFT; i++) { 633286705Smav err = dump_dnode(dsa, dnobj + i, blk + i); 634248571Smm if (err != 0) 635168404Spjd break; 636168404Spjd } 637208047Smm (void) arc_buf_remove_ref(abuf, &abuf); 638219089Spjd } else if (type == DMU_OT_SA) { 639275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 640208047Smm arc_buf_t *abuf; 641168404Spjd int blksz = BP_GET_LSIZE(bp); 642168404Spjd 643246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 644246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 645246666Smm &aflags, zb) != 0) 646249195Smm return (SET_ERROR(EIO)); 647168404Spjd 648286705Smav err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data); 649219089Spjd (void) arc_buf_remove_ref(abuf, &abuf); 650286705Smav } else if (backup_do_embed(dsa, bp)) { 651268075Sdelphij /* it's an embedded level-0 block of a regular object */ 652286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 653286705Smav ASSERT0(zb->zb_level); 654286705Smav err = dump_write_embedded(dsa, zb->zb_object, 655268075Sdelphij zb->zb_blkid * blksz, blksz, bp); 656286705Smav } else { 657286705Smav /* it's a level-0 block of a regular object */ 658275811Sdelphij arc_flags_t aflags = ARC_FLAG_WAIT; 659219089Spjd arc_buf_t *abuf; 660286705Smav int blksz = dblkszsec << SPA_MINBLOCKSHIFT; 661274337Sdelphij uint64_t offset; 662219089Spjd 663260183Sdelphij ASSERT0(zb->zb_level); 664289362Smav ASSERT(zb->zb_object > dsa->dsa_resume_object || 665289362Smav (zb->zb_object == dsa->dsa_resume_object && 666289362Smav zb->zb_blkid * blksz >= dsa->dsa_resume_offset)); 667289362Smav 668246666Smm if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, 669246666Smm ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, 670246666Smm &aflags, zb) != 0) { 671228103Smm if (zfs_send_corrupt_data) { 672228103Smm /* Send a block filled with 0x"zfs badd bloc" */ 673228103Smm abuf = arc_buf_alloc(spa, blksz, &abuf, 674228103Smm ARC_BUFC_DATA); 675228103Smm uint64_t *ptr; 676228103Smm for (ptr = abuf->b_data; 677228103Smm (char *)ptr < (char *)abuf->b_data + blksz; 678228103Smm ptr++) 679286554Smav *ptr = 0x2f5baddb10cULL; 680228103Smm } else { 681249195Smm return (SET_ERROR(EIO)); 682228103Smm } 683228103Smm } 684219089Spjd 685274337Sdelphij offset = zb->zb_blkid * blksz; 686274337Sdelphij 687286705Smav if (!(dsa->dsa_featureflags & 688274337Sdelphij DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 689274337Sdelphij blksz > SPA_OLD_MAXBLOCKSIZE) { 690274337Sdelphij char *buf = abuf->b_data; 691274337Sdelphij while (blksz > 0 && err == 0) { 692274337Sdelphij int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); 693286705Smav err = dump_write(dsa, type, zb->zb_object, 694274337Sdelphij offset, n, NULL, buf); 695274337Sdelphij offset += n; 696274337Sdelphij buf += n; 697274337Sdelphij blksz -= n; 698274337Sdelphij } 699274337Sdelphij } else { 700286705Smav err = dump_write(dsa, type, zb->zb_object, 701274337Sdelphij offset, blksz, bp, abuf->b_data); 702274337Sdelphij } 703208047Smm (void) arc_buf_remove_ref(abuf, &abuf); 704168404Spjd } 705168404Spjd 706168404Spjd ASSERT(err == 0 || err == EINTR); 707168404Spjd return (err); 708168404Spjd} 709168404Spjd 710248571Smm/* 711286705Smav * Pop the new data off the queue, and free the old data. 712248571Smm */ 713286705Smavstatic struct send_block_record * 714286705Smavget_next_record(bqueue_t *bq, struct send_block_record *data) 715286705Smav{ 716286705Smav struct send_block_record *tmp = bqueue_dequeue(bq); 717286705Smav kmem_free(data, sizeof (*data)); 718286705Smav return (tmp); 719286705Smav} 720286705Smav 721286705Smav/* 722286705Smav * Actually do the bulk of the work in a zfs send. 723286705Smav * 724286705Smav * Note: Releases dp using the specified tag. 725286705Smav */ 726248571Smmstatic int 727286705Smavdmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, 728289362Smav zfs_bookmark_phys_t *ancestor_zb, 729289362Smav boolean_t is_clone, boolean_t embedok, boolean_t large_block_ok, int outfd, 730289362Smav uint64_t resumeobj, uint64_t resumeoff, 731248571Smm#ifdef illumos 732289362Smav vnode_t *vp, offset_t *off) 733248571Smm#else 734289362Smav struct file *fp, offset_t *off) 735248571Smm#endif 736168404Spjd{ 737248571Smm objset_t *os; 738168404Spjd dmu_replay_record_t *drr; 739235222Smm dmu_sendarg_t *dsp; 740168404Spjd int err; 741185029Spjd uint64_t fromtxg = 0; 742268075Sdelphij uint64_t featureflags = 0; 743289362Smav struct send_thread_arg to_arg = { 0 }; 744168404Spjd 745286705Smav err = dmu_objset_from_ds(to_ds, &os); 746248571Smm if (err != 0) { 747248571Smm dsl_pool_rele(dp, tag); 748248571Smm return (err); 749185029Spjd } 750185029Spjd 751168404Spjd drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); 752168404Spjd drr->drr_type = DRR_BEGIN; 753168404Spjd drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; 754219089Spjd DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, 755219089Spjd DMU_SUBSTREAM); 756219089Spjd 757219089Spjd#ifdef _KERNEL 758248571Smm if (dmu_objset_type(os) == DMU_OST_ZFS) { 759219089Spjd uint64_t version; 760248571Smm if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { 761235222Smm kmem_free(drr, sizeof (dmu_replay_record_t)); 762248571Smm dsl_pool_rele(dp, tag); 763249195Smm return (SET_ERROR(EINVAL)); 764235222Smm } 765248571Smm if (version >= ZPL_VERSION_SA) { 766268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; 767219089Spjd } 768219089Spjd } 769219089Spjd#endif 770219089Spjd 771286708Smav if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) 772274337Sdelphij featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; 773268075Sdelphij if (embedok && 774268075Sdelphij spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { 775268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; 776268075Sdelphij if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 777268075Sdelphij featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; 778268075Sdelphij } 779268075Sdelphij 780289362Smav if (resumeobj != 0 || resumeoff != 0) { 781289362Smav featureflags |= DMU_BACKUP_FEATURE_RESUMING; 782289362Smav } 783289362Smav 784268075Sdelphij DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, 785268075Sdelphij featureflags); 786268075Sdelphij 787168404Spjd drr->drr_u.drr_begin.drr_creation_time = 788286705Smav dsl_dataset_phys(to_ds)->ds_creation_time; 789248571Smm drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); 790260183Sdelphij if (is_clone) 791185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; 792286705Smav drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid; 793286705Smav if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET) 794185029Spjd drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; 795296516Smav if (zfs_send_set_freerecords_bit) 796296516Smav drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_FREERECORDS; 797185029Spjd 798286705Smav if (ancestor_zb != NULL) { 799286705Smav drr->drr_u.drr_begin.drr_fromguid = 800286705Smav ancestor_zb->zbm_guid; 801286705Smav fromtxg = ancestor_zb->zbm_creation_txg; 802260183Sdelphij } 803286705Smav dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname); 804286705Smav if (!to_ds->ds_is_snapshot) { 805260183Sdelphij (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", 806260183Sdelphij sizeof (drr->drr_u.drr_begin.drr_toname)); 807248571Smm } 808185029Spjd 809235222Smm dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); 810168404Spjd 811235222Smm dsp->dsa_drr = drr; 812235222Smm dsp->dsa_outfd = outfd; 813235222Smm dsp->dsa_proc = curproc; 814235222Smm dsp->dsa_td = curthread; 815235222Smm dsp->dsa_fp = fp; 816248571Smm dsp->dsa_os = os; 817235222Smm dsp->dsa_off = off; 818286705Smav dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid; 819235222Smm dsp->dsa_pending_op = PENDING_NONE; 820268075Sdelphij dsp->dsa_featureflags = featureflags; 821289362Smav dsp->dsa_resume_object = resumeobj; 822289362Smav dsp->dsa_resume_offset = resumeoff; 823235222Smm 824286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 825286705Smav list_insert_head(&to_ds->ds_sendstreams, dsp); 826286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 827235222Smm 828286705Smav dsl_dataset_long_hold(to_ds, FTAG); 829249042Smm dsl_pool_rele(dp, tag); 830249042Smm 831289362Smav void *payload = NULL; 832289362Smav size_t payload_len = 0; 833289362Smav if (resumeobj != 0 || resumeoff != 0) { 834289362Smav dmu_object_info_t to_doi; 835289362Smav err = dmu_object_info(os, resumeobj, &to_doi); 836289362Smav if (err != 0) 837289362Smav goto out; 838289362Smav SET_BOOKMARK(&to_arg.resume, to_ds->ds_object, resumeobj, 0, 839289362Smav resumeoff / to_doi.doi_data_block_size); 840289362Smav 841289362Smav nvlist_t *nvl = fnvlist_alloc(); 842289362Smav fnvlist_add_uint64(nvl, "resume_object", resumeobj); 843289362Smav fnvlist_add_uint64(nvl, "resume_offset", resumeoff); 844289362Smav payload = fnvlist_pack(nvl, &payload_len); 845289362Smav drr->drr_payloadlen = payload_len; 846289362Smav fnvlist_free(nvl); 847289362Smav } 848289362Smav 849289362Smav err = dump_record(dsp, payload, payload_len); 850289362Smav fnvlist_pack_free(payload, payload_len); 851289362Smav if (err != 0) { 852235222Smm err = dsp->dsa_err; 853235222Smm goto out; 854168404Spjd } 855168404Spjd 856286705Smav err = bqueue_init(&to_arg.q, zfs_send_queue_length, 857286705Smav offsetof(struct send_block_record, ln)); 858286705Smav to_arg.error_code = 0; 859286705Smav to_arg.cancel = B_FALSE; 860286705Smav to_arg.ds = to_ds; 861286705Smav to_arg.fromtxg = fromtxg; 862286705Smav to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH; 863287280Sdelphij (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, &p0, 864286705Smav TS_RUN, minclsyspri); 865168404Spjd 866286705Smav struct send_block_record *to_data; 867286705Smav to_data = bqueue_dequeue(&to_arg.q); 868286705Smav 869286705Smav while (!to_data->eos_marker && err == 0) { 870286705Smav err = do_dump(dsp, to_data); 871286705Smav to_data = get_next_record(&to_arg.q, to_data); 872286705Smav if (issig(JUSTLOOKING) && issig(FORREAL)) 873286705Smav err = EINTR; 874286705Smav } 875286705Smav 876286705Smav if (err != 0) { 877286705Smav to_arg.cancel = B_TRUE; 878286705Smav while (!to_data->eos_marker) { 879286705Smav to_data = get_next_record(&to_arg.q, to_data); 880286705Smav } 881286705Smav } 882286705Smav kmem_free(to_data, sizeof (*to_data)); 883286705Smav 884286705Smav bqueue_destroy(&to_arg.q); 885286705Smav 886286705Smav if (err == 0 && to_arg.error_code != 0) 887286705Smav err = to_arg.error_code; 888286705Smav 889286705Smav if (err != 0) 890286705Smav goto out; 891286705Smav 892235222Smm if (dsp->dsa_pending_op != PENDING_NONE) 893286587Smav if (dump_record(dsp, NULL, 0) != 0) 894249195Smm err = SET_ERROR(EINTR); 895219089Spjd 896248571Smm if (err != 0) { 897248571Smm if (err == EINTR && dsp->dsa_err != 0) 898235222Smm err = dsp->dsa_err; 899235222Smm goto out; 900168404Spjd } 901168404Spjd 902168404Spjd bzero(drr, sizeof (dmu_replay_record_t)); 903168404Spjd drr->drr_type = DRR_END; 904235222Smm drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; 905235222Smm drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; 906168404Spjd 907286705Smav if (dump_record(dsp, NULL, 0) != 0) 908235222Smm err = dsp->dsa_err; 909168404Spjd 910235222Smmout: 911286705Smav mutex_enter(&to_ds->ds_sendstream_lock); 912286705Smav list_remove(&to_ds->ds_sendstreams, dsp); 913286705Smav mutex_exit(&to_ds->ds_sendstream_lock); 914235222Smm 915168404Spjd kmem_free(drr, sizeof (dmu_replay_record_t)); 916235222Smm kmem_free(dsp, sizeof (dmu_sendarg_t)); 917168404Spjd 918286705Smav dsl_dataset_long_rele(to_ds, FTAG); 919248571Smm 920235222Smm return (err); 921168404Spjd} 922168404Spjd 923228103Smmint 924248571Smmdmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, 925274337Sdelphij boolean_t embedok, boolean_t large_block_ok, 926248571Smm#ifdef illumos 927274337Sdelphij int outfd, vnode_t *vp, offset_t *off) 928248571Smm#else 929274337Sdelphij int outfd, struct file *fp, offset_t *off) 930248571Smm#endif 931228103Smm{ 932248571Smm dsl_pool_t *dp; 933248571Smm dsl_dataset_t *ds; 934248571Smm dsl_dataset_t *fromds = NULL; 935248571Smm int err; 936248571Smm 937248571Smm err = dsl_pool_hold(pool, FTAG, &dp); 938248571Smm if (err != 0) 939248571Smm return (err); 940248571Smm 941248571Smm err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); 942248571Smm if (err != 0) { 943248571Smm dsl_pool_rele(dp, FTAG); 944248571Smm return (err); 945248571Smm } 946248571Smm 947248571Smm if (fromsnap != 0) { 948260183Sdelphij zfs_bookmark_phys_t zb; 949260183Sdelphij boolean_t is_clone; 950260183Sdelphij 951248571Smm err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); 952248571Smm if (err != 0) { 953248571Smm dsl_dataset_rele(ds, FTAG); 954248571Smm dsl_pool_rele(dp, FTAG); 955248571Smm return (err); 956248571Smm } 957260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 958260183Sdelphij err = SET_ERROR(EXDEV); 959275782Sdelphij zb.zbm_creation_time = 960275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 961275782Sdelphij zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; 962275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 963260183Sdelphij is_clone = (fromds->ds_dir != ds->ds_dir); 964260183Sdelphij dsl_dataset_rele(fromds, FTAG); 965274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 966289362Smav embedok, large_block_ok, outfd, 0, 0, fp, off); 967260183Sdelphij } else { 968274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 969289362Smav embedok, large_block_ok, outfd, 0, 0, fp, off); 970248571Smm } 971260183Sdelphij dsl_dataset_rele(ds, FTAG); 972260183Sdelphij return (err); 973248571Smm} 974248571Smm 975248571Smmint 976289362Smavdmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok, 977289362Smav boolean_t large_block_ok, int outfd, uint64_t resumeobj, uint64_t resumeoff, 978248571Smm#ifdef illumos 979289362Smav vnode_t *vp, offset_t *off) 980248571Smm#else 981289362Smav struct file *fp, offset_t *off) 982248571Smm#endif 983248571Smm{ 984248571Smm dsl_pool_t *dp; 985248571Smm dsl_dataset_t *ds; 986248571Smm int err; 987260183Sdelphij boolean_t owned = B_FALSE; 988248571Smm 989260183Sdelphij if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) 990249195Smm return (SET_ERROR(EINVAL)); 991248571Smm 992248571Smm err = dsl_pool_hold(tosnap, FTAG, &dp); 993248571Smm if (err != 0) 994248571Smm return (err); 995248571Smm 996260183Sdelphij if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { 997260183Sdelphij /* 998260183Sdelphij * We are sending a filesystem or volume. Ensure 999260183Sdelphij * that it doesn't change by owning the dataset. 1000260183Sdelphij */ 1001260183Sdelphij err = dsl_dataset_own(dp, tosnap, FTAG, &ds); 1002260183Sdelphij owned = B_TRUE; 1003260183Sdelphij } else { 1004260183Sdelphij err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); 1005260183Sdelphij } 1006248571Smm if (err != 0) { 1007248571Smm dsl_pool_rele(dp, FTAG); 1008248571Smm return (err); 1009248571Smm } 1010248571Smm 1011248571Smm if (fromsnap != NULL) { 1012260183Sdelphij zfs_bookmark_phys_t zb; 1013260183Sdelphij boolean_t is_clone = B_FALSE; 1014260183Sdelphij int fsnamelen = strchr(tosnap, '@') - tosnap; 1015260183Sdelphij 1016260183Sdelphij /* 1017260183Sdelphij * If the fromsnap is in a different filesystem, then 1018260183Sdelphij * mark the send stream as a clone. 1019260183Sdelphij */ 1020260183Sdelphij if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || 1021260183Sdelphij (fromsnap[fsnamelen] != '@' && 1022260183Sdelphij fromsnap[fsnamelen] != '#')) { 1023260183Sdelphij is_clone = B_TRUE; 1024260183Sdelphij } 1025260183Sdelphij 1026260183Sdelphij if (strchr(fromsnap, '@')) { 1027260183Sdelphij dsl_dataset_t *fromds; 1028260183Sdelphij err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); 1029260183Sdelphij if (err == 0) { 1030260183Sdelphij if (!dsl_dataset_is_before(ds, fromds, 0)) 1031260183Sdelphij err = SET_ERROR(EXDEV); 1032260183Sdelphij zb.zbm_creation_time = 1033275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_time; 1034260183Sdelphij zb.zbm_creation_txg = 1035275782Sdelphij dsl_dataset_phys(fromds)->ds_creation_txg; 1036275782Sdelphij zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; 1037260183Sdelphij is_clone = (ds->ds_dir != fromds->ds_dir); 1038260183Sdelphij dsl_dataset_rele(fromds, FTAG); 1039260183Sdelphij } 1040260183Sdelphij } else { 1041260183Sdelphij err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); 1042260183Sdelphij } 1043248571Smm if (err != 0) { 1044248571Smm dsl_dataset_rele(ds, FTAG); 1045248571Smm dsl_pool_rele(dp, FTAG); 1046248571Smm return (err); 1047248571Smm } 1048274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, 1049289362Smav embedok, large_block_ok, 1050289362Smav outfd, resumeobj, resumeoff, fp, off); 1051260183Sdelphij } else { 1052274337Sdelphij err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, 1053289362Smav embedok, large_block_ok, 1054289362Smav outfd, resumeobj, resumeoff, fp, off); 1055248571Smm } 1056260183Sdelphij if (owned) 1057260183Sdelphij dsl_dataset_disown(ds, FTAG); 1058260183Sdelphij else 1059260183Sdelphij dsl_dataset_rele(ds, FTAG); 1060260183Sdelphij return (err); 1061248571Smm} 1062248571Smm 1063286683Smavstatic int 1064286683Smavdmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t size, 1065286683Smav uint64_t *sizep) 1066286683Smav{ 1067286683Smav int err; 1068286683Smav /* 1069286683Smav * Assume that space (both on-disk and in-stream) is dominated by 1070286683Smav * data. We will adjust for indirect blocks and the copies property, 1071286683Smav * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). 1072286683Smav */ 1073286683Smav 1074286683Smav /* 1075286683Smav * Subtract out approximate space used by indirect blocks. 1076286683Smav * Assume most space is used by data blocks (non-indirect, non-dnode). 1077286683Smav * Assume all blocks are recordsize. Assume ditto blocks and 1078286683Smav * internal fragmentation counter out compression. 1079286683Smav * 1080286683Smav * Therefore, space used by indirect blocks is sizeof(blkptr_t) per 1081286683Smav * block, which we observe in practice. 1082286683Smav */ 1083286683Smav uint64_t recordsize; 1084286683Smav err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); 1085286683Smav if (err != 0) 1086286683Smav return (err); 1087286683Smav size -= size / recordsize * sizeof (blkptr_t); 1088286683Smav 1089286683Smav /* Add in the space for the record associated with each block. */ 1090286683Smav size += size / recordsize * sizeof (dmu_replay_record_t); 1091286683Smav 1092286683Smav *sizep = size; 1093286683Smav 1094286683Smav return (0); 1095286683Smav} 1096286683Smav 1097248571Smmint 1098248571Smmdmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) 1099248571Smm{ 1100228103Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1101228103Smm int err; 1102228103Smm uint64_t size; 1103228103Smm 1104248571Smm ASSERT(dsl_pool_config_held(dp)); 1105248571Smm 1106228103Smm /* tosnap must be a snapshot */ 1107286575Smav if (!ds->ds_is_snapshot) 1108249195Smm return (SET_ERROR(EINVAL)); 1109228103Smm 1110284301Savg /* fromsnap, if provided, must be a snapshot */ 1111286575Smav if (fromds != NULL && !fromds->ds_is_snapshot) 1112284301Savg return (SET_ERROR(EINVAL)); 1113284301Savg 1114248571Smm /* 1115248571Smm * fromsnap must be an earlier snapshot from the same fs as tosnap, 1116248571Smm * or the origin's fs. 1117248571Smm */ 1118260183Sdelphij if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) 1119249195Smm return (SET_ERROR(EXDEV)); 1120228103Smm 1121228103Smm /* Get uncompressed size estimate of changed data. */ 1122228103Smm if (fromds == NULL) { 1123275782Sdelphij size = dsl_dataset_phys(ds)->ds_uncompressed_bytes; 1124228103Smm } else { 1125228103Smm uint64_t used, comp; 1126228103Smm err = dsl_dataset_space_written(fromds, ds, 1127228103Smm &used, &comp, &size); 1128248571Smm if (err != 0) 1129228103Smm return (err); 1130228103Smm } 1131228103Smm 1132286683Smav err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); 1133286683Smav return (err); 1134286683Smav} 1135228103Smm 1136286683Smav/* 1137286683Smav * Simple callback used to traverse the blocks of a snapshot and sum their 1138286683Smav * uncompressed size 1139286683Smav */ 1140286683Smav/* ARGSUSED */ 1141286683Smavstatic int 1142286683Smavdmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1143286683Smav const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1144286683Smav{ 1145286683Smav uint64_t *spaceptr = arg; 1146286683Smav if (bp != NULL && !BP_IS_HOLE(bp)) { 1147286683Smav *spaceptr += BP_GET_UCSIZE(bp); 1148286683Smav } 1149286683Smav return (0); 1150286683Smav} 1151286683Smav 1152286683Smav/* 1153286683Smav * Given a desination snapshot and a TXG, calculate the approximate size of a 1154286683Smav * send stream sent from that TXG. from_txg may be zero, indicating that the 1155286683Smav * whole snapshot will be sent. 1156286683Smav */ 1157286683Smavint 1158286683Smavdmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, 1159286683Smav uint64_t *sizep) 1160286683Smav{ 1161286683Smav dsl_pool_t *dp = ds->ds_dir->dd_pool; 1162286683Smav int err; 1163286683Smav uint64_t size = 0; 1164286683Smav 1165286683Smav ASSERT(dsl_pool_config_held(dp)); 1166286683Smav 1167286683Smav /* tosnap must be a snapshot */ 1168286683Smav if (!dsl_dataset_is_snapshot(ds)) 1169286683Smav return (SET_ERROR(EINVAL)); 1170286683Smav 1171286683Smav /* verify that from_txg is before the provided snapshot was taken */ 1172286683Smav if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { 1173286683Smav return (SET_ERROR(EXDEV)); 1174286683Smav } 1175286683Smav 1176228103Smm /* 1177286683Smav * traverse the blocks of the snapshot with birth times after 1178286683Smav * from_txg, summing their uncompressed size 1179228103Smm */ 1180286683Smav err = traverse_dataset(ds, from_txg, TRAVERSE_POST, 1181286683Smav dmu_calculate_send_traversal, &size); 1182286683Smav if (err) 1183228103Smm return (err); 1184228103Smm 1185286683Smav err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); 1186286683Smav return (err); 1187228103Smm} 1188228103Smm 1189248571Smmtypedef struct dmu_recv_begin_arg { 1190248571Smm const char *drba_origin; 1191248571Smm dmu_recv_cookie_t *drba_cookie; 1192248571Smm cred_t *drba_cred; 1193253820Sdelphij uint64_t drba_snapobj; 1194248571Smm} dmu_recv_begin_arg_t; 1195168404Spjd 1196168404Spjdstatic int 1197248571Smmrecv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, 1198248571Smm uint64_t fromguid) 1199168404Spjd{ 1200185029Spjd uint64_t val; 1201248571Smm int error; 1202248571Smm dsl_pool_t *dp = ds->ds_dir->dd_pool; 1203185029Spjd 1204248571Smm /* temporary clone name must not exist */ 1205248571Smm error = zap_lookup(dp->dp_meta_objset, 1206275782Sdelphij dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, 1207248571Smm 8, 1, &val); 1208248571Smm if (error != ENOENT) 1209248571Smm return (error == 0 ? EBUSY : error); 1210248571Smm 1211219089Spjd /* new snapshot name must not exist */ 1212248571Smm error = zap_lookup(dp->dp_meta_objset, 1213275782Sdelphij dsl_dataset_phys(ds)->ds_snapnames_zapobj, 1214275782Sdelphij drba->drba_cookie->drc_tosnap, 8, 1, &val); 1215248571Smm if (error != ENOENT) 1216248571Smm return (error == 0 ? EEXIST : error); 1217168404Spjd 1218264835Sdelphij /* 1219264835Sdelphij * Check snapshot limit before receiving. We'll recheck again at the 1220264835Sdelphij * end, but might as well abort before receiving if we're already over 1221264835Sdelphij * the limit. 1222264835Sdelphij * 1223264835Sdelphij * Note that we do not check the file system limit with 1224264835Sdelphij * dsl_dir_fscount_check because the temporary %clones don't count 1225264835Sdelphij * against that limit. 1226264835Sdelphij */ 1227264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, 1228264835Sdelphij NULL, drba->drba_cred); 1229264835Sdelphij if (error != 0) 1230264835Sdelphij return (error); 1231264835Sdelphij 1232248571Smm if (fromguid != 0) { 1233253820Sdelphij dsl_dataset_t *snap; 1234275782Sdelphij uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; 1235253820Sdelphij 1236253820Sdelphij /* Find snapshot in this dir that matches fromguid. */ 1237253820Sdelphij while (obj != 0) { 1238253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 1239253820Sdelphij &snap); 1240253820Sdelphij if (error != 0) 1241253820Sdelphij return (SET_ERROR(ENODEV)); 1242253820Sdelphij if (snap->ds_dir != ds->ds_dir) { 1243253820Sdelphij dsl_dataset_rele(snap, FTAG); 1244253820Sdelphij return (SET_ERROR(ENODEV)); 1245253820Sdelphij } 1246275782Sdelphij if (dsl_dataset_phys(snap)->ds_guid == fromguid) 1247253820Sdelphij break; 1248275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 1249253820Sdelphij dsl_dataset_rele(snap, FTAG); 1250253820Sdelphij } 1251253820Sdelphij if (obj == 0) 1252249195Smm return (SET_ERROR(ENODEV)); 1253168404Spjd 1254253820Sdelphij if (drba->drba_cookie->drc_force) { 1255253820Sdelphij drba->drba_snapobj = obj; 1256253820Sdelphij } else { 1257253820Sdelphij /* 1258253820Sdelphij * If we are not forcing, there must be no 1259253820Sdelphij * changes since fromsnap. 1260253820Sdelphij */ 1261253820Sdelphij if (dsl_dataset_modified_since_snap(ds, snap)) { 1262219089Spjd dsl_dataset_rele(snap, FTAG); 1263253820Sdelphij return (SET_ERROR(ETXTBSY)); 1264219089Spjd } 1265253820Sdelphij drba->drba_snapobj = ds->ds_prev->ds_object; 1266219089Spjd } 1267253820Sdelphij 1268253820Sdelphij dsl_dataset_rele(snap, FTAG); 1269219089Spjd } else { 1270283525Savg /* if full, then must be forced */ 1271283525Savg if (!drba->drba_cookie->drc_force) 1272283525Savg return (SET_ERROR(EEXIST)); 1273283525Savg /* start from $ORIGIN@$ORIGIN, if supported */ 1274283525Savg drba->drba_snapobj = dp->dp_origin_snap != NULL ? 1275283525Savg dp->dp_origin_snap->ds_object : 0; 1276219089Spjd } 1277219089Spjd 1278248571Smm return (0); 1279168404Spjd 1280168404Spjd} 1281168404Spjd 1282248571Smmstatic int 1283248571Smmdmu_recv_begin_check(void *arg, dmu_tx_t *tx) 1284248571Smm{ 1285248571Smm dmu_recv_begin_arg_t *drba = arg; 1286248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1287248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1288248571Smm uint64_t fromguid = drrb->drr_fromguid; 1289248571Smm int flags = drrb->drr_flags; 1290248571Smm int error; 1291268075Sdelphij uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1292248571Smm dsl_dataset_t *ds; 1293248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1294248571Smm 1295248571Smm /* already checked */ 1296248571Smm ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1297289362Smav ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING)); 1298248571Smm 1299248571Smm if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1300248571Smm DMU_COMPOUNDSTREAM || 1301248571Smm drrb->drr_type >= DMU_OST_NUMTYPES || 1302248571Smm ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) 1303249195Smm return (SET_ERROR(EINVAL)); 1304248571Smm 1305248571Smm /* Verify pool version supports SA if SA_SPILL feature set */ 1306268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1307268075Sdelphij spa_version(dp->dp_spa) < SPA_VERSION_SA) 1308249195Smm return (SET_ERROR(ENOTSUP)); 1309248571Smm 1310289362Smav if (drba->drba_cookie->drc_resumable && 1311289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET)) 1312289362Smav return (SET_ERROR(ENOTSUP)); 1313289362Smav 1314268075Sdelphij /* 1315268075Sdelphij * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1316268075Sdelphij * record to a plan WRITE record, so the pool must have the 1317268075Sdelphij * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1318268075Sdelphij * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1319268075Sdelphij */ 1320268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1321268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1322268075Sdelphij return (SET_ERROR(ENOTSUP)); 1323268075Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && 1324268075Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1325268075Sdelphij return (SET_ERROR(ENOTSUP)); 1326268075Sdelphij 1327274337Sdelphij /* 1328274337Sdelphij * The receiving code doesn't know how to translate large blocks 1329274337Sdelphij * to smaller ones, so the pool must have the LARGE_BLOCKS 1330274337Sdelphij * feature enabled if the stream has LARGE_BLOCKS. 1331274337Sdelphij */ 1332274337Sdelphij if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && 1333274337Sdelphij !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) 1334274337Sdelphij return (SET_ERROR(ENOTSUP)); 1335274337Sdelphij 1336248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1337248571Smm if (error == 0) { 1338248571Smm /* target fs already exists; recv into temp clone */ 1339248571Smm 1340248571Smm /* Can't recv a clone into an existing fs */ 1341294815Smav if (flags & DRR_FLAG_CLONE || drba->drba_origin) { 1342248571Smm dsl_dataset_rele(ds, FTAG); 1343249195Smm return (SET_ERROR(EINVAL)); 1344248571Smm } 1345248571Smm 1346248571Smm error = recv_begin_check_existing_impl(drba, ds, fromguid); 1347248571Smm dsl_dataset_rele(ds, FTAG); 1348248571Smm } else if (error == ENOENT) { 1349248571Smm /* target fs does not exist; must be a full backup or clone */ 1350307108Smav char buf[ZFS_MAX_DATASET_NAME_LEN]; 1351248571Smm 1352248571Smm /* 1353248571Smm * If it's a non-clone incremental, we are missing the 1354248571Smm * target fs, so fail the recv. 1355248571Smm */ 1356286705Smav if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || 1357286705Smav drba->drba_origin)) 1358249195Smm return (SET_ERROR(ENOENT)); 1359248571Smm 1360294815Smav /* 1361294815Smav * If we're receiving a full send as a clone, and it doesn't 1362294815Smav * contain all the necessary free records and freeobject 1363294815Smav * records, reject it. 1364294815Smav */ 1365294815Smav if (fromguid == 0 && drba->drba_origin && 1366294815Smav !(flags & DRR_FLAG_FREERECORDS)) 1367294815Smav return (SET_ERROR(EINVAL)); 1368294815Smav 1369248571Smm /* Open the parent of tofs */ 1370307108Smav ASSERT3U(strlen(tofs), <, sizeof (buf)); 1371248571Smm (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); 1372248571Smm error = dsl_dataset_hold(dp, buf, FTAG, &ds); 1373248571Smm if (error != 0) 1374248571Smm return (error); 1375248571Smm 1376264835Sdelphij /* 1377264835Sdelphij * Check filesystem and snapshot limits before receiving. We'll 1378264835Sdelphij * recheck snapshot limits again at the end (we create the 1379264835Sdelphij * filesystems and increment those counts during begin_sync). 1380264835Sdelphij */ 1381264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1382264835Sdelphij ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); 1383264835Sdelphij if (error != 0) { 1384264835Sdelphij dsl_dataset_rele(ds, FTAG); 1385264835Sdelphij return (error); 1386264835Sdelphij } 1387264835Sdelphij 1388264835Sdelphij error = dsl_fs_ss_limit_check(ds->ds_dir, 1, 1389264835Sdelphij ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); 1390264835Sdelphij if (error != 0) { 1391264835Sdelphij dsl_dataset_rele(ds, FTAG); 1392264835Sdelphij return (error); 1393264835Sdelphij } 1394264835Sdelphij 1395248571Smm if (drba->drba_origin != NULL) { 1396248571Smm dsl_dataset_t *origin; 1397248571Smm error = dsl_dataset_hold(dp, drba->drba_origin, 1398248571Smm FTAG, &origin); 1399248571Smm if (error != 0) { 1400248571Smm dsl_dataset_rele(ds, FTAG); 1401248571Smm return (error); 1402248571Smm } 1403286575Smav if (!origin->ds_is_snapshot) { 1404248571Smm dsl_dataset_rele(origin, FTAG); 1405248571Smm dsl_dataset_rele(ds, FTAG); 1406249195Smm return (SET_ERROR(EINVAL)); 1407248571Smm } 1408294815Smav if (dsl_dataset_phys(origin)->ds_guid != fromguid && 1409294815Smav fromguid != 0) { 1410248571Smm dsl_dataset_rele(origin, FTAG); 1411248571Smm dsl_dataset_rele(ds, FTAG); 1412249195Smm return (SET_ERROR(ENODEV)); 1413248571Smm } 1414248571Smm dsl_dataset_rele(origin, FTAG); 1415248571Smm } 1416248571Smm dsl_dataset_rele(ds, FTAG); 1417248571Smm error = 0; 1418248571Smm } 1419248571Smm return (error); 1420248571Smm} 1421248571Smm 1422168404Spjdstatic void 1423248571Smmdmu_recv_begin_sync(void *arg, dmu_tx_t *tx) 1424168404Spjd{ 1425248571Smm dmu_recv_begin_arg_t *drba = arg; 1426248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 1427289362Smav objset_t *mos = dp->dp_meta_objset; 1428248571Smm struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1429248571Smm const char *tofs = drba->drba_cookie->drc_tofs; 1430248571Smm dsl_dataset_t *ds, *newds; 1431185029Spjd uint64_t dsobj; 1432248571Smm int error; 1433289362Smav uint64_t crflags = 0; 1434168404Spjd 1435289362Smav if (drrb->drr_flags & DRR_FLAG_CI_DATA) 1436289362Smav crflags |= DS_FLAG_CI_DATASET; 1437168404Spjd 1438248571Smm error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1439248571Smm if (error == 0) { 1440248571Smm /* create temporary clone */ 1441253820Sdelphij dsl_dataset_t *snap = NULL; 1442253820Sdelphij if (drba->drba_snapobj != 0) { 1443253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, 1444253820Sdelphij drba->drba_snapobj, FTAG, &snap)); 1445253820Sdelphij } 1446248571Smm dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, 1447253820Sdelphij snap, crflags, drba->drba_cred, tx); 1448282632Savg if (drba->drba_snapobj != 0) 1449282632Savg dsl_dataset_rele(snap, FTAG); 1450248571Smm dsl_dataset_rele(ds, FTAG); 1451248571Smm } else { 1452248571Smm dsl_dir_t *dd; 1453248571Smm const char *tail; 1454248571Smm dsl_dataset_t *origin = NULL; 1455248571Smm 1456248571Smm VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); 1457248571Smm 1458248571Smm if (drba->drba_origin != NULL) { 1459248571Smm VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, 1460248571Smm FTAG, &origin)); 1461248571Smm } 1462248571Smm 1463248571Smm /* Create new dataset. */ 1464248571Smm dsobj = dsl_dataset_create_sync(dd, 1465248571Smm strrchr(tofs, '/') + 1, 1466248571Smm origin, crflags, drba->drba_cred, tx); 1467248571Smm if (origin != NULL) 1468248571Smm dsl_dataset_rele(origin, FTAG); 1469248571Smm dsl_dir_rele(dd, FTAG); 1470248571Smm drba->drba_cookie->drc_newfs = B_TRUE; 1471248571Smm } 1472248571Smm VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); 1473248571Smm 1474289362Smav if (drba->drba_cookie->drc_resumable) { 1475289362Smav dsl_dataset_zapify(newds, tx); 1476289362Smav if (drrb->drr_fromguid != 0) { 1477289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID, 1478289362Smav 8, 1, &drrb->drr_fromguid, tx)); 1479289362Smav } 1480289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID, 1481289362Smav 8, 1, &drrb->drr_toguid, tx)); 1482289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME, 1483289362Smav 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx)); 1484289362Smav uint64_t one = 1; 1485289362Smav uint64_t zero = 0; 1486289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT, 1487289362Smav 8, 1, &one, tx)); 1488289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET, 1489289362Smav 8, 1, &zero, tx)); 1490289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES, 1491289362Smav 8, 1, &zero, tx)); 1492289362Smav if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & 1493289362Smav DMU_BACKUP_FEATURE_EMBED_DATA) { 1494289362Smav VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, 1495289362Smav 8, 1, &one, tx)); 1496289362Smav } 1497289362Smav } 1498289362Smav 1499248571Smm dmu_buf_will_dirty(newds->ds_dbuf, tx); 1500275782Sdelphij dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; 1501248571Smm 1502219089Spjd /* 1503219089Spjd * If we actually created a non-clone, we need to create the 1504219089Spjd * objset in our new dataset. 1505219089Spjd */ 1506248571Smm if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { 1507219089Spjd (void) dmu_objset_create_impl(dp->dp_spa, 1508248571Smm newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); 1509219089Spjd } 1510168404Spjd 1511248571Smm drba->drba_cookie->drc_ds = newds; 1512185029Spjd 1513248571Smm spa_history_log_internal_ds(newds, "receive", tx, ""); 1514168404Spjd} 1515168404Spjd 1516289362Smavstatic int 1517289362Smavdmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx) 1518289362Smav{ 1519289362Smav dmu_recv_begin_arg_t *drba = arg; 1520289362Smav dsl_pool_t *dp = dmu_tx_pool(tx); 1521289362Smav struct drr_begin *drrb = drba->drba_cookie->drc_drrb; 1522289362Smav int error; 1523289362Smav uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 1524289362Smav dsl_dataset_t *ds; 1525289362Smav const char *tofs = drba->drba_cookie->drc_tofs; 1526289362Smav 1527289362Smav /* already checked */ 1528289362Smav ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); 1529289362Smav ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING); 1530289362Smav 1531289362Smav if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 1532289362Smav DMU_COMPOUNDSTREAM || 1533289362Smav drrb->drr_type >= DMU_OST_NUMTYPES) 1534289362Smav return (SET_ERROR(EINVAL)); 1535289362Smav 1536289362Smav /* Verify pool version supports SA if SA_SPILL feature set */ 1537289362Smav if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && 1538289362Smav spa_version(dp->dp_spa) < SPA_VERSION_SA) 1539289362Smav return (SET_ERROR(ENOTSUP)); 1540289362Smav 1541289362Smav /* 1542289362Smav * The receiving code doesn't know how to translate a WRITE_EMBEDDED 1543289362Smav * record to a plain WRITE record, so the pool must have the 1544289362Smav * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED 1545289362Smav * records. Same with WRITE_EMBEDDED records that use LZ4 compression. 1546289362Smav */ 1547289362Smav if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && 1548289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) 1549289362Smav return (SET_ERROR(ENOTSUP)); 1550289362Smav if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && 1551289362Smav !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) 1552289362Smav return (SET_ERROR(ENOTSUP)); 1553289362Smav 1554307108Smav /* 6 extra bytes for /%recv */ 1555307108Smav char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 1556289362Smav 1557289362Smav (void) snprintf(recvname, sizeof (recvname), "%s/%s", 1558289362Smav tofs, recv_clone_name); 1559289362Smav 1560289362Smav if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { 1561289362Smav /* %recv does not exist; continue in tofs */ 1562289362Smav error = dsl_dataset_hold(dp, tofs, FTAG, &ds); 1563289362Smav if (error != 0) 1564289362Smav return (error); 1565289362Smav } 1566289362Smav 1567289362Smav /* check that ds is marked inconsistent */ 1568289362Smav if (!DS_IS_INCONSISTENT(ds)) { 1569289362Smav dsl_dataset_rele(ds, FTAG); 1570289362Smav return (SET_ERROR(EINVAL)); 1571289362Smav } 1572289362Smav 1573289362Smav /* check that there is resuming data, and that the toguid matches */ 1574289362Smav if (!dsl_dataset_is_zapified(ds)) { 1575289362Smav dsl_dataset_rele(ds, FTAG); 1576289362Smav return (SET_ERROR(EINVAL)); 1577289362Smav } 1578289362Smav uint64_t val; 1579289362Smav error = zap_lookup(dp->dp_meta_objset, ds->ds_object, 1580289362Smav DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val); 1581289362Smav if (error != 0 || drrb->drr_toguid != val) { 1582289362Smav dsl_dataset_rele(ds, FTAG); 1583289362Smav return (SET_ERROR(EINVAL)); 1584289362Smav } 1585289362Smav 1586289362Smav /* 1587289362Smav * Check if the receive is still running. If so, it will be owned. 1588289362Smav * Note that nothing else can own the dataset (e.g. after the receive 1589289362Smav * fails) because it will be marked inconsistent. 1590289362Smav */ 1591289362Smav if (dsl_dataset_has_owner(ds)) { 1592289362Smav dsl_dataset_rele(ds, FTAG); 1593289362Smav return (SET_ERROR(EBUSY)); 1594289362Smav } 1595289362Smav 1596289362Smav /* There should not be any snapshots of this fs yet. */ 1597289362Smav if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) { 1598289362Smav dsl_dataset_rele(ds, FTAG); 1599289362Smav return (SET_ERROR(EINVAL)); 1600289362Smav } 1601289362Smav 1602289362Smav /* 1603289362Smav * Note: resume point will be checked when we process the first WRITE 1604289362Smav * record. 1605289362Smav */ 1606289362Smav 1607289362Smav /* check that the origin matches */ 1608289362Smav val = 0; 1609289362Smav (void) zap_lookup(dp->dp_meta_objset, ds->ds_object, 1610289362Smav DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val); 1611289362Smav if (drrb->drr_fromguid != val) { 1612289362Smav dsl_dataset_rele(ds, FTAG); 1613289362Smav return (SET_ERROR(EINVAL)); 1614289362Smav } 1615289362Smav 1616289362Smav dsl_dataset_rele(ds, FTAG); 1617289362Smav return (0); 1618289362Smav} 1619289362Smav 1620289362Smavstatic void 1621289362Smavdmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx) 1622289362Smav{ 1623289362Smav dmu_recv_begin_arg_t *drba = arg; 1624289362Smav dsl_pool_t *dp = dmu_tx_pool(tx); 1625289362Smav const char *tofs = drba->drba_cookie->drc_tofs; 1626289362Smav dsl_dataset_t *ds; 1627289362Smav uint64_t dsobj; 1628307108Smav /* 6 extra bytes for /%recv */ 1629307108Smav char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; 1630289362Smav 1631289362Smav (void) snprintf(recvname, sizeof (recvname), "%s/%s", 1632289362Smav tofs, recv_clone_name); 1633289362Smav 1634289362Smav if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { 1635289362Smav /* %recv does not exist; continue in tofs */ 1636289362Smav VERIFY0(dsl_dataset_hold(dp, tofs, FTAG, &ds)); 1637289362Smav drba->drba_cookie->drc_newfs = B_TRUE; 1638289362Smav } 1639289362Smav 1640289362Smav /* clear the inconsistent flag so that we can own it */ 1641289362Smav ASSERT(DS_IS_INCONSISTENT(ds)); 1642289362Smav dmu_buf_will_dirty(ds->ds_dbuf, tx); 1643289362Smav dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 1644289362Smav dsobj = ds->ds_object; 1645289362Smav dsl_dataset_rele(ds, FTAG); 1646289362Smav 1647289362Smav VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &ds)); 1648289362Smav 1649289362Smav dmu_buf_will_dirty(ds->ds_dbuf, tx); 1650289362Smav dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; 1651289362Smav 1652289362Smav ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds))); 1653289362Smav 1654289362Smav drba->drba_cookie->drc_ds = ds; 1655289362Smav 1656289362Smav spa_history_log_internal_ds(ds, "resume receive", tx, ""); 1657289362Smav} 1658289362Smav 1659185029Spjd/* 1660185029Spjd * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() 1661185029Spjd * succeeds; otherwise we will leak the holds on the datasets. 1662185029Spjd */ 1663185029Spjdint 1664289362Smavdmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, 1665289362Smav boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc) 1666168404Spjd{ 1667248571Smm dmu_recv_begin_arg_t drba = { 0 }; 1668168404Spjd 1669185029Spjd bzero(drc, sizeof (dmu_recv_cookie_t)); 1670289362Smav drc->drc_drr_begin = drr_begin; 1671289362Smav drc->drc_drrb = &drr_begin->drr_u.drr_begin; 1672185029Spjd drc->drc_tosnap = tosnap; 1673248571Smm drc->drc_tofs = tofs; 1674185029Spjd drc->drc_force = force; 1675289362Smav drc->drc_resumable = resumable; 1676264835Sdelphij drc->drc_cred = CRED(); 1677168404Spjd 1678289362Smav if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { 1679248571Smm drc->drc_byteswap = B_TRUE; 1680289362Smav fletcher_4_incremental_byteswap(drr_begin, 1681248571Smm sizeof (dmu_replay_record_t), &drc->drc_cksum); 1682289362Smav byteswap_record(drr_begin); 1683289362Smav } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { 1684289362Smav fletcher_4_incremental_native(drr_begin, 1685289362Smav sizeof (dmu_replay_record_t), &drc->drc_cksum); 1686248571Smm } else { 1687289362Smav return (SET_ERROR(EINVAL)); 1688248571Smm } 1689219089Spjd 1690248571Smm drba.drba_origin = origin; 1691248571Smm drba.drba_cookie = drc; 1692248571Smm drba.drba_cred = CRED(); 1693219089Spjd 1694289362Smav if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & 1695289362Smav DMU_BACKUP_FEATURE_RESUMING) { 1696289362Smav return (dsl_sync_task(tofs, 1697289362Smav dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync, 1698289362Smav &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1699289362Smav } else { 1700289362Smav return (dsl_sync_task(tofs, 1701289362Smav dmu_recv_begin_check, dmu_recv_begin_sync, 1702289362Smav &drba, 5, ZFS_SPACE_CHECK_NORMAL)); 1703289362Smav } 1704168404Spjd} 1705168404Spjd 1706286705Smavstruct receive_record_arg { 1707286705Smav dmu_replay_record_t header; 1708286705Smav void *payload; /* Pointer to a buffer containing the payload */ 1709286705Smav /* 1710286705Smav * If the record is a write, pointer to the arc_buf_t containing the 1711286705Smav * payload. 1712286705Smav */ 1713286705Smav arc_buf_t *write_buf; 1714286705Smav int payload_size; 1715289362Smav uint64_t bytes_read; /* bytes read from stream when record created */ 1716286705Smav boolean_t eos_marker; /* Marks the end of the stream */ 1717286705Smav bqueue_node_t node; 1718286705Smav}; 1719286705Smav 1720286705Smavstruct receive_writer_arg { 1721286587Smav objset_t *os; 1722286705Smav boolean_t byteswap; 1723286705Smav bqueue_t q; 1724289362Smav 1725286705Smav /* 1726286705Smav * These three args are used to signal to the main thread that we're 1727286705Smav * done. 1728286705Smav */ 1729286705Smav kmutex_t mutex; 1730286705Smav kcondvar_t cv; 1731286705Smav boolean_t done; 1732289362Smav 1733185029Spjd int err; 1734286705Smav /* A map from guid to dataset to help handle dedup'd streams. */ 1735286705Smav avl_tree_t *guid_to_ds_map; 1736289362Smav boolean_t resumable; 1737289362Smav uint64_t last_object, last_offset; 1738289362Smav uint64_t bytes_read; /* bytes read when current record created */ 1739286705Smav}; 1740286705Smav 1741294815Smavstruct objlist { 1742294815Smav list_t list; /* List of struct receive_objnode. */ 1743294815Smav /* 1744294815Smav * Last object looked up. Used to assert that objects are being looked 1745294815Smav * up in ascending order. 1746294815Smav */ 1747294815Smav uint64_t last_lookup; 1748294815Smav}; 1749294815Smav 1750294815Smavstruct receive_objnode { 1751294815Smav list_node_t node; 1752294815Smav uint64_t object; 1753294815Smav}; 1754294815Smav 1755286705Smavstruct receive_arg { 1756286705Smav objset_t *os; 1757185029Spjd kthread_t *td; 1758185029Spjd struct file *fp; 1759286705Smav uint64_t voff; /* The current offset in the stream */ 1760289362Smav uint64_t bytes_read; 1761286705Smav /* 1762286705Smav * A record that has had its payload read in, but hasn't yet been handed 1763286705Smav * off to the worker thread. 1764286705Smav */ 1765286705Smav struct receive_record_arg *rrd; 1766286705Smav /* A record that has had its header read in, but not its payload. */ 1767286705Smav struct receive_record_arg *next_rrd; 1768185029Spjd zio_cksum_t cksum; 1769286587Smav zio_cksum_t prev_cksum; 1770286705Smav int err; 1771286705Smav boolean_t byteswap; 1772286705Smav /* Sorted list of objects not to issue prefetches for. */ 1773294815Smav struct objlist ignore_objlist; 1774286705Smav}; 1775286587Smav 1776219089Spjdtypedef struct guid_map_entry { 1777219089Spjd uint64_t guid; 1778219089Spjd dsl_dataset_t *gme_ds; 1779219089Spjd avl_node_t avlnode; 1780219089Spjd} guid_map_entry_t; 1781219089Spjd 1782168404Spjdstatic int 1783219089Spjdguid_compare(const void *arg1, const void *arg2) 1784168404Spjd{ 1785219089Spjd const guid_map_entry_t *gmep1 = arg1; 1786219089Spjd const guid_map_entry_t *gmep2 = arg2; 1787219089Spjd 1788219089Spjd if (gmep1->guid < gmep2->guid) 1789219089Spjd return (-1); 1790219089Spjd else if (gmep1->guid > gmep2->guid) 1791219089Spjd return (1); 1792219089Spjd return (0); 1793219089Spjd} 1794219089Spjd 1795219089Spjdstatic void 1796219089Spjdfree_guid_map_onexit(void *arg) 1797219089Spjd{ 1798219089Spjd avl_tree_t *ca = arg; 1799219089Spjd void *cookie = NULL; 1800219089Spjd guid_map_entry_t *gmep; 1801219089Spjd 1802219089Spjd while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { 1803248571Smm dsl_dataset_long_rele(gmep->gme_ds, gmep); 1804249196Smm dsl_dataset_rele(gmep->gme_ds, gmep); 1805219089Spjd kmem_free(gmep, sizeof (guid_map_entry_t)); 1806219089Spjd } 1807219089Spjd avl_destroy(ca); 1808219089Spjd kmem_free(ca, sizeof (avl_tree_t)); 1809219089Spjd} 1810219089Spjd 1811219089Spjdstatic int 1812286705Smavrestore_bytes(struct receive_arg *ra, void *buf, int len, off_t off, ssize_t *resid) 1813219089Spjd{ 1814168404Spjd struct uio auio; 1815168404Spjd struct iovec aiov; 1816168404Spjd int error; 1817168404Spjd 1818168404Spjd aiov.iov_base = buf; 1819168404Spjd aiov.iov_len = len; 1820168404Spjd auio.uio_iov = &aiov; 1821168404Spjd auio.uio_iovcnt = 1; 1822168404Spjd auio.uio_resid = len; 1823169170Spjd auio.uio_segflg = UIO_SYSSPACE; 1824168404Spjd auio.uio_rw = UIO_READ; 1825168404Spjd auio.uio_offset = off; 1826168404Spjd auio.uio_td = ra->td; 1827168404Spjd#ifdef _KERNEL 1828168404Spjd error = fo_read(ra->fp, &auio, ra->td->td_ucred, FOF_OFFSET, ra->td); 1829168404Spjd#else 1830168404Spjd fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__); 1831168404Spjd error = EOPNOTSUPP; 1832168404Spjd#endif 1833168404Spjd *resid = auio.uio_resid; 1834168404Spjd return (error); 1835168404Spjd} 1836168404Spjd 1837286587Smavstatic int 1838286705Smavreceive_read(struct receive_arg *ra, int len, void *buf) 1839168404Spjd{ 1840185029Spjd int done = 0; 1841168404Spjd 1842297509Smav /* 1843297509Smav * The code doesn't rely on this (lengths being multiples of 8). See 1844297509Smav * comment in dump_bytes. 1845297509Smav */ 1846240415Smm ASSERT0(len % 8); 1847168404Spjd 1848185029Spjd while (done < len) { 1849219089Spjd ssize_t resid; 1850168404Spjd 1851272601Sdelphij ra->err = restore_bytes(ra, buf + done, 1852185029Spjd len - done, ra->voff, &resid); 1853168404Spjd 1854289362Smav if (resid == len - done) { 1855289362Smav /* 1856289362Smav * Note: ECKSUM indicates that the receive 1857289362Smav * was interrupted and can potentially be resumed. 1858289362Smav */ 1859289362Smav ra->err = SET_ERROR(ECKSUM); 1860289362Smav } 1861185029Spjd ra->voff += len - done - resid; 1862185029Spjd done = len - resid; 1863248571Smm if (ra->err != 0) 1864286587Smav return (ra->err); 1865168404Spjd } 1866168404Spjd 1867289362Smav ra->bytes_read += len; 1868289362Smav 1869185029Spjd ASSERT3U(done, ==, len); 1870286587Smav return (0); 1871168404Spjd} 1872168404Spjd 1873168404Spjdstatic void 1874286587Smavbyteswap_record(dmu_replay_record_t *drr) 1875168404Spjd{ 1876168404Spjd#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) 1877168404Spjd#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) 1878168404Spjd drr->drr_type = BSWAP_32(drr->drr_type); 1879185029Spjd drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); 1880286587Smav 1881168404Spjd switch (drr->drr_type) { 1882168404Spjd case DRR_BEGIN: 1883168404Spjd DO64(drr_begin.drr_magic); 1884219089Spjd DO64(drr_begin.drr_versioninfo); 1885168404Spjd DO64(drr_begin.drr_creation_time); 1886168404Spjd DO32(drr_begin.drr_type); 1887185029Spjd DO32(drr_begin.drr_flags); 1888168404Spjd DO64(drr_begin.drr_toguid); 1889168404Spjd DO64(drr_begin.drr_fromguid); 1890168404Spjd break; 1891168404Spjd case DRR_OBJECT: 1892168404Spjd DO64(drr_object.drr_object); 1893168404Spjd DO32(drr_object.drr_type); 1894168404Spjd DO32(drr_object.drr_bonustype); 1895168404Spjd DO32(drr_object.drr_blksz); 1896168404Spjd DO32(drr_object.drr_bonuslen); 1897219089Spjd DO64(drr_object.drr_toguid); 1898168404Spjd break; 1899168404Spjd case DRR_FREEOBJECTS: 1900168404Spjd DO64(drr_freeobjects.drr_firstobj); 1901168404Spjd DO64(drr_freeobjects.drr_numobjs); 1902219089Spjd DO64(drr_freeobjects.drr_toguid); 1903168404Spjd break; 1904168404Spjd case DRR_WRITE: 1905168404Spjd DO64(drr_write.drr_object); 1906168404Spjd DO32(drr_write.drr_type); 1907168404Spjd DO64(drr_write.drr_offset); 1908168404Spjd DO64(drr_write.drr_length); 1909219089Spjd DO64(drr_write.drr_toguid); 1910286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); 1911219089Spjd DO64(drr_write.drr_key.ddk_prop); 1912168404Spjd break; 1913219089Spjd case DRR_WRITE_BYREF: 1914219089Spjd DO64(drr_write_byref.drr_object); 1915219089Spjd DO64(drr_write_byref.drr_offset); 1916219089Spjd DO64(drr_write_byref.drr_length); 1917219089Spjd DO64(drr_write_byref.drr_toguid); 1918219089Spjd DO64(drr_write_byref.drr_refguid); 1919219089Spjd DO64(drr_write_byref.drr_refobject); 1920219089Spjd DO64(drr_write_byref.drr_refoffset); 1921286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. 1922286587Smav drr_key.ddk_cksum); 1923219089Spjd DO64(drr_write_byref.drr_key.ddk_prop); 1924219089Spjd break; 1925268075Sdelphij case DRR_WRITE_EMBEDDED: 1926268075Sdelphij DO64(drr_write_embedded.drr_object); 1927268075Sdelphij DO64(drr_write_embedded.drr_offset); 1928268075Sdelphij DO64(drr_write_embedded.drr_length); 1929268075Sdelphij DO64(drr_write_embedded.drr_toguid); 1930268075Sdelphij DO32(drr_write_embedded.drr_lsize); 1931268075Sdelphij DO32(drr_write_embedded.drr_psize); 1932268075Sdelphij break; 1933168404Spjd case DRR_FREE: 1934168404Spjd DO64(drr_free.drr_object); 1935168404Spjd DO64(drr_free.drr_offset); 1936168404Spjd DO64(drr_free.drr_length); 1937219089Spjd DO64(drr_free.drr_toguid); 1938168404Spjd break; 1939219089Spjd case DRR_SPILL: 1940219089Spjd DO64(drr_spill.drr_object); 1941219089Spjd DO64(drr_spill.drr_length); 1942219089Spjd DO64(drr_spill.drr_toguid); 1943219089Spjd break; 1944168404Spjd case DRR_END: 1945219089Spjd DO64(drr_end.drr_toguid); 1946286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); 1947168404Spjd break; 1948168404Spjd } 1949286587Smav 1950286587Smav if (drr->drr_type != DRR_BEGIN) { 1951286587Smav ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); 1952286587Smav } 1953286587Smav 1954168404Spjd#undef DO64 1955168404Spjd#undef DO32 1956168404Spjd} 1957168404Spjd 1958272810Sdelphijstatic inline uint8_t 1959272810Sdelphijdeduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) 1960272810Sdelphij{ 1961272810Sdelphij if (bonus_type == DMU_OT_SA) { 1962272810Sdelphij return (1); 1963272810Sdelphij } else { 1964272810Sdelphij return (1 + 1965272810Sdelphij ((DN_MAX_BONUSLEN - bonus_size) >> SPA_BLKPTRSHIFT)); 1966272810Sdelphij } 1967272810Sdelphij} 1968272810Sdelphij 1969289362Smavstatic void 1970289362Smavsave_resume_state(struct receive_writer_arg *rwa, 1971289362Smav uint64_t object, uint64_t offset, dmu_tx_t *tx) 1972289362Smav{ 1973289362Smav int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; 1974289362Smav 1975289362Smav if (!rwa->resumable) 1976289362Smav return; 1977289362Smav 1978289362Smav /* 1979289362Smav * We use ds_resume_bytes[] != 0 to indicate that we need to 1980289362Smav * update this on disk, so it must not be 0. 1981289362Smav */ 1982289362Smav ASSERT(rwa->bytes_read != 0); 1983289362Smav 1984289362Smav /* 1985289362Smav * We only resume from write records, which have a valid 1986289362Smav * (non-meta-dnode) object number. 1987289362Smav */ 1988289362Smav ASSERT(object != 0); 1989289362Smav 1990289362Smav /* 1991289362Smav * For resuming to work correctly, we must receive records in order, 1992289362Smav * sorted by object,offset. This is checked by the callers, but 1993289362Smav * assert it here for good measure. 1994289362Smav */ 1995289362Smav ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]); 1996289362Smav ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] || 1997289362Smav offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]); 1998289362Smav ASSERT3U(rwa->bytes_read, >=, 1999289362Smav rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]); 2000289362Smav 2001289362Smav rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object; 2002289362Smav rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset; 2003289362Smav rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read; 2004289362Smav} 2005289362Smav 2006168404Spjdstatic int 2007286705Smavreceive_object(struct receive_writer_arg *rwa, struct drr_object *drro, 2008286705Smav void *data) 2009168404Spjd{ 2010272810Sdelphij dmu_object_info_t doi; 2011168404Spjd dmu_tx_t *tx; 2012272810Sdelphij uint64_t object; 2013272810Sdelphij int err; 2014168404Spjd 2015168404Spjd if (drro->drr_type == DMU_OT_NONE || 2016236884Smm !DMU_OT_IS_VALID(drro->drr_type) || 2017236884Smm !DMU_OT_IS_VALID(drro->drr_bonustype) || 2018219089Spjd drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || 2019168404Spjd drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || 2020168404Spjd P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || 2021168404Spjd drro->drr_blksz < SPA_MINBLOCKSIZE || 2022286705Smav drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || 2023168404Spjd drro->drr_bonuslen > DN_MAX_BONUSLEN) { 2024249195Smm return (SET_ERROR(EINVAL)); 2025168404Spjd } 2026168404Spjd 2027286705Smav err = dmu_object_info(rwa->os, drro->drr_object, &doi); 2028168404Spjd 2029200726Sdelphij if (err != 0 && err != ENOENT) 2030249195Smm return (SET_ERROR(EINVAL)); 2031272810Sdelphij object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; 2032200726Sdelphij 2033272810Sdelphij /* 2034272810Sdelphij * If we are losing blkptrs or changing the block size this must 2035272810Sdelphij * be a new file instance. We must clear out the previous file 2036272810Sdelphij * contents before we can change this type of metadata in the dnode. 2037272810Sdelphij */ 2038272810Sdelphij if (err == 0) { 2039272810Sdelphij int nblkptr; 2040272810Sdelphij 2041272810Sdelphij nblkptr = deduce_nblkptr(drro->drr_bonustype, 2042272810Sdelphij drro->drr_bonuslen); 2043272810Sdelphij 2044272810Sdelphij if (drro->drr_blksz != doi.doi_data_block_size || 2045272810Sdelphij nblkptr < doi.doi_nblkptr) { 2046286705Smav err = dmu_free_long_range(rwa->os, drro->drr_object, 2047272810Sdelphij 0, DMU_OBJECT_END); 2048272810Sdelphij if (err != 0) 2049272810Sdelphij return (SET_ERROR(EINVAL)); 2050272810Sdelphij } 2051272810Sdelphij } 2052272810Sdelphij 2053286705Smav tx = dmu_tx_create(rwa->os); 2054272810Sdelphij dmu_tx_hold_bonus(tx, object); 2055272810Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 2056272810Sdelphij if (err != 0) { 2057272810Sdelphij dmu_tx_abort(tx); 2058272810Sdelphij return (err); 2059272810Sdelphij } 2060272810Sdelphij 2061272810Sdelphij if (object == DMU_NEW_OBJECT) { 2062168404Spjd /* currently free, want to be allocated */ 2063286705Smav err = dmu_object_claim(rwa->os, drro->drr_object, 2064168404Spjd drro->drr_type, drro->drr_blksz, 2065168404Spjd drro->drr_bonustype, drro->drr_bonuslen, tx); 2066272810Sdelphij } else if (drro->drr_type != doi.doi_type || 2067272810Sdelphij drro->drr_blksz != doi.doi_data_block_size || 2068272810Sdelphij drro->drr_bonustype != doi.doi_bonus_type || 2069272810Sdelphij drro->drr_bonuslen != doi.doi_bonus_size) { 2070272810Sdelphij /* currently allocated, but with different properties */ 2071286705Smav err = dmu_object_reclaim(rwa->os, drro->drr_object, 2072168404Spjd drro->drr_type, drro->drr_blksz, 2073272810Sdelphij drro->drr_bonustype, drro->drr_bonuslen, tx); 2074168404Spjd } 2075248571Smm if (err != 0) { 2076272810Sdelphij dmu_tx_commit(tx); 2077249195Smm return (SET_ERROR(EINVAL)); 2078219089Spjd } 2079200726Sdelphij 2080286705Smav dmu_object_set_checksum(rwa->os, drro->drr_object, 2081286587Smav drro->drr_checksumtype, tx); 2082286705Smav dmu_object_set_compress(rwa->os, drro->drr_object, 2083286587Smav drro->drr_compress, tx); 2084168404Spjd 2085200727Sdelphij if (data != NULL) { 2086168404Spjd dmu_buf_t *db; 2087200727Sdelphij 2088286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db)); 2089168404Spjd dmu_buf_will_dirty(db, tx); 2090168404Spjd 2091185029Spjd ASSERT3U(db->db_size, >=, drro->drr_bonuslen); 2092185029Spjd bcopy(data, db->db_data, drro->drr_bonuslen); 2093286705Smav if (rwa->byteswap) { 2094236884Smm dmu_object_byteswap_t byteswap = 2095236884Smm DMU_OT_BYTESWAP(drro->drr_bonustype); 2096236884Smm dmu_ot_byteswap[byteswap].ob_func(db->db_data, 2097168404Spjd drro->drr_bonuslen); 2098168404Spjd } 2099168404Spjd dmu_buf_rele(db, FTAG); 2100168404Spjd } 2101168404Spjd dmu_tx_commit(tx); 2102289362Smav 2103168404Spjd return (0); 2104168404Spjd} 2105168404Spjd 2106168404Spjd/* ARGSUSED */ 2107168404Spjdstatic int 2108286705Smavreceive_freeobjects(struct receive_writer_arg *rwa, 2109168404Spjd struct drr_freeobjects *drrfo) 2110168404Spjd{ 2111168404Spjd uint64_t obj; 2112294815Smav int next_err = 0; 2113168404Spjd 2114168404Spjd if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) 2115249195Smm return (SET_ERROR(EINVAL)); 2116168404Spjd 2117168404Spjd for (obj = drrfo->drr_firstobj; 2118294815Smav obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0; 2119294815Smav next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) { 2120168404Spjd int err; 2121168404Spjd 2122286705Smav if (dmu_object_info(rwa->os, obj, NULL) != 0) 2123168404Spjd continue; 2124168404Spjd 2125286705Smav err = dmu_free_long_object(rwa->os, obj); 2126248571Smm if (err != 0) 2127168404Spjd return (err); 2128168404Spjd } 2129294815Smav if (next_err != ESRCH) 2130294815Smav return (next_err); 2131168404Spjd return (0); 2132168404Spjd} 2133168404Spjd 2134168404Spjdstatic int 2135286705Smavreceive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, 2136286705Smav arc_buf_t *abuf) 2137168404Spjd{ 2138168404Spjd dmu_tx_t *tx; 2139168404Spjd int err; 2140168404Spjd 2141168404Spjd if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || 2142236884Smm !DMU_OT_IS_VALID(drrw->drr_type)) 2143249195Smm return (SET_ERROR(EINVAL)); 2144168404Spjd 2145289362Smav /* 2146289362Smav * For resuming to work, records must be in increasing order 2147289362Smav * by (object, offset). 2148289362Smav */ 2149289362Smav if (drrw->drr_object < rwa->last_object || 2150289362Smav (drrw->drr_object == rwa->last_object && 2151289362Smav drrw->drr_offset < rwa->last_offset)) { 2152289362Smav return (SET_ERROR(EINVAL)); 2153289362Smav } 2154289362Smav rwa->last_object = drrw->drr_object; 2155289362Smav rwa->last_offset = drrw->drr_offset; 2156289362Smav 2157286705Smav if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) 2158249195Smm return (SET_ERROR(EINVAL)); 2159168404Spjd 2160286705Smav tx = dmu_tx_create(rwa->os); 2161272601Sdelphij 2162168404Spjd dmu_tx_hold_write(tx, drrw->drr_object, 2163168404Spjd drrw->drr_offset, drrw->drr_length); 2164168404Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2165248571Smm if (err != 0) { 2166168404Spjd dmu_tx_abort(tx); 2167168404Spjd return (err); 2168168404Spjd } 2169286705Smav if (rwa->byteswap) { 2170236884Smm dmu_object_byteswap_t byteswap = 2171236884Smm DMU_OT_BYTESWAP(drrw->drr_type); 2172286587Smav dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, 2173286587Smav drrw->drr_length); 2174236884Smm } 2175286587Smav 2176286587Smav dmu_buf_t *bonus; 2177286705Smav if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) 2178286587Smav return (SET_ERROR(EINVAL)); 2179272601Sdelphij dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); 2180289362Smav 2181289362Smav /* 2182289362Smav * Note: If the receive fails, we want the resume stream to start 2183289362Smav * with the same record that we last successfully received (as opposed 2184289362Smav * to the next record), so that we can verify that we are 2185289362Smav * resuming from the correct location. 2186289362Smav */ 2187289362Smav save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx); 2188168404Spjd dmu_tx_commit(tx); 2189272601Sdelphij dmu_buf_rele(bonus, FTAG); 2190289362Smav 2191168404Spjd return (0); 2192168404Spjd} 2193168404Spjd 2194219089Spjd/* 2195219089Spjd * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed 2196219089Spjd * streams to refer to a copy of the data that is already on the 2197219089Spjd * system because it came in earlier in the stream. This function 2198219089Spjd * finds the earlier copy of the data, and uses that copy instead of 2199219089Spjd * data from the stream to fulfill this write. 2200219089Spjd */ 2201219089Spjdstatic int 2202286705Smavreceive_write_byref(struct receive_writer_arg *rwa, 2203286705Smav struct drr_write_byref *drrwbr) 2204219089Spjd{ 2205219089Spjd dmu_tx_t *tx; 2206219089Spjd int err; 2207219089Spjd guid_map_entry_t gmesrch; 2208219089Spjd guid_map_entry_t *gmep; 2209268075Sdelphij avl_index_t where; 2210219089Spjd objset_t *ref_os = NULL; 2211219089Spjd dmu_buf_t *dbp; 2212219089Spjd 2213219089Spjd if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) 2214249195Smm return (SET_ERROR(EINVAL)); 2215219089Spjd 2216219089Spjd /* 2217219089Spjd * If the GUID of the referenced dataset is different from the 2218219089Spjd * GUID of the target dataset, find the referenced dataset. 2219219089Spjd */ 2220219089Spjd if (drrwbr->drr_toguid != drrwbr->drr_refguid) { 2221219089Spjd gmesrch.guid = drrwbr->drr_refguid; 2222286705Smav if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, 2223219089Spjd &where)) == NULL) { 2224249195Smm return (SET_ERROR(EINVAL)); 2225219089Spjd } 2226219089Spjd if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) 2227249195Smm return (SET_ERROR(EINVAL)); 2228219089Spjd } else { 2229286705Smav ref_os = rwa->os; 2230219089Spjd } 2231219089Spjd 2232268075Sdelphij err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, 2233268075Sdelphij drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); 2234268075Sdelphij if (err != 0) 2235219089Spjd return (err); 2236219089Spjd 2237286705Smav tx = dmu_tx_create(rwa->os); 2238219089Spjd 2239219089Spjd dmu_tx_hold_write(tx, drrwbr->drr_object, 2240219089Spjd drrwbr->drr_offset, drrwbr->drr_length); 2241219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2242248571Smm if (err != 0) { 2243219089Spjd dmu_tx_abort(tx); 2244219089Spjd return (err); 2245219089Spjd } 2246286705Smav dmu_write(rwa->os, drrwbr->drr_object, 2247219089Spjd drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); 2248219089Spjd dmu_buf_rele(dbp, FTAG); 2249289362Smav 2250289362Smav /* See comment in restore_write. */ 2251289362Smav save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx); 2252219089Spjd dmu_tx_commit(tx); 2253219089Spjd return (0); 2254219089Spjd} 2255219089Spjd 2256219089Spjdstatic int 2257286705Smavreceive_write_embedded(struct receive_writer_arg *rwa, 2258289362Smav struct drr_write_embedded *drrwe, void *data) 2259268075Sdelphij{ 2260268075Sdelphij dmu_tx_t *tx; 2261268075Sdelphij int err; 2262268075Sdelphij 2263289362Smav if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) 2264268075Sdelphij return (EINVAL); 2265268075Sdelphij 2266289362Smav if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) 2267268075Sdelphij return (EINVAL); 2268268075Sdelphij 2269289362Smav if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) 2270268075Sdelphij return (EINVAL); 2271289362Smav if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) 2272268075Sdelphij return (EINVAL); 2273268075Sdelphij 2274286705Smav tx = dmu_tx_create(rwa->os); 2275268075Sdelphij 2276289362Smav dmu_tx_hold_write(tx, drrwe->drr_object, 2277289362Smav drrwe->drr_offset, drrwe->drr_length); 2278268075Sdelphij err = dmu_tx_assign(tx, TXG_WAIT); 2279268075Sdelphij if (err != 0) { 2280268075Sdelphij dmu_tx_abort(tx); 2281268075Sdelphij return (err); 2282268075Sdelphij } 2283268075Sdelphij 2284289362Smav dmu_write_embedded(rwa->os, drrwe->drr_object, 2285289362Smav drrwe->drr_offset, data, drrwe->drr_etype, 2286289362Smav drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize, 2287286705Smav rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); 2288268075Sdelphij 2289289362Smav /* See comment in restore_write. */ 2290289362Smav save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx); 2291268075Sdelphij dmu_tx_commit(tx); 2292268075Sdelphij return (0); 2293268075Sdelphij} 2294268075Sdelphij 2295268075Sdelphijstatic int 2296286705Smavreceive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, 2297286705Smav void *data) 2298219089Spjd{ 2299219089Spjd dmu_tx_t *tx; 2300219089Spjd dmu_buf_t *db, *db_spill; 2301219089Spjd int err; 2302219089Spjd 2303219089Spjd if (drrs->drr_length < SPA_MINBLOCKSIZE || 2304286705Smav drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) 2305249195Smm return (SET_ERROR(EINVAL)); 2306219089Spjd 2307286705Smav if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) 2308249195Smm return (SET_ERROR(EINVAL)); 2309219089Spjd 2310286705Smav VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); 2311219089Spjd if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { 2312219089Spjd dmu_buf_rele(db, FTAG); 2313219089Spjd return (err); 2314219089Spjd } 2315219089Spjd 2316286705Smav tx = dmu_tx_create(rwa->os); 2317219089Spjd 2318219089Spjd dmu_tx_hold_spill(tx, db->db_object); 2319219089Spjd 2320219089Spjd err = dmu_tx_assign(tx, TXG_WAIT); 2321248571Smm if (err != 0) { 2322219089Spjd dmu_buf_rele(db, FTAG); 2323219089Spjd dmu_buf_rele(db_spill, FTAG); 2324219089Spjd dmu_tx_abort(tx); 2325219089Spjd return (err); 2326219089Spjd } 2327219089Spjd dmu_buf_will_dirty(db_spill, tx); 2328219089Spjd 2329219089Spjd if (db_spill->db_size < drrs->drr_length) 2330219089Spjd VERIFY(0 == dbuf_spill_set_blksz(db_spill, 2331219089Spjd drrs->drr_length, tx)); 2332219089Spjd bcopy(data, db_spill->db_data, drrs->drr_length); 2333219089Spjd 2334219089Spjd dmu_buf_rele(db, FTAG); 2335219089Spjd dmu_buf_rele(db_spill, FTAG); 2336219089Spjd 2337219089Spjd dmu_tx_commit(tx); 2338219089Spjd return (0); 2339219089Spjd} 2340219089Spjd 2341168404Spjd/* ARGSUSED */ 2342168404Spjdstatic int 2343286705Smavreceive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) 2344168404Spjd{ 2345168404Spjd int err; 2346168404Spjd 2347168404Spjd if (drrf->drr_length != -1ULL && 2348168404Spjd drrf->drr_offset + drrf->drr_length < drrf->drr_offset) 2349249195Smm return (SET_ERROR(EINVAL)); 2350168404Spjd 2351286705Smav if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) 2352249195Smm return (SET_ERROR(EINVAL)); 2353168404Spjd 2354286705Smav err = dmu_free_long_range(rwa->os, drrf->drr_object, 2355168404Spjd drrf->drr_offset, drrf->drr_length); 2356286705Smav 2357168404Spjd return (err); 2358168404Spjd} 2359168404Spjd 2360248571Smm/* used to destroy the drc_ds on error */ 2361248571Smmstatic void 2362248571Smmdmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) 2363248571Smm{ 2364289362Smav if (drc->drc_resumable) { 2365289362Smav /* wait for our resume state to be written to disk */ 2366289362Smav txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0); 2367289362Smav dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2368289362Smav } else { 2369307108Smav char name[ZFS_MAX_DATASET_NAME_LEN]; 2370289362Smav dsl_dataset_name(drc->drc_ds, name); 2371289362Smav dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 2372289362Smav (void) dsl_destroy_head(name); 2373289362Smav } 2374248571Smm} 2375248571Smm 2376286587Smavstatic void 2377286705Smavreceive_cksum(struct receive_arg *ra, int len, void *buf) 2378286587Smav{ 2379286587Smav if (ra->byteswap) { 2380286587Smav fletcher_4_incremental_byteswap(buf, len, &ra->cksum); 2381286587Smav } else { 2382286587Smav fletcher_4_incremental_native(buf, len, &ra->cksum); 2383286587Smav } 2384286587Smav} 2385286587Smav 2386185029Spjd/* 2387286705Smav * Read the payload into a buffer of size len, and update the current record's 2388286705Smav * payload field. 2389286705Smav * Allocate ra->next_rrd and read the next record's header into 2390286705Smav * ra->next_rrd->header. 2391286587Smav * Verify checksum of payload and next record. 2392286587Smav */ 2393286587Smavstatic int 2394286705Smavreceive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) 2395286587Smav{ 2396286587Smav int err; 2397286587Smav 2398286587Smav if (len != 0) { 2399286705Smav ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); 2400289362Smav err = receive_read(ra, len, buf); 2401286587Smav if (err != 0) 2402286587Smav return (err); 2403289362Smav receive_cksum(ra, len, buf); 2404289362Smav 2405289362Smav /* note: rrd is NULL when reading the begin record's payload */ 2406289362Smav if (ra->rrd != NULL) { 2407289362Smav ra->rrd->payload = buf; 2408289362Smav ra->rrd->payload_size = len; 2409289362Smav ra->rrd->bytes_read = ra->bytes_read; 2410289362Smav } 2411286587Smav } 2412286587Smav 2413286587Smav ra->prev_cksum = ra->cksum; 2414286587Smav 2415286705Smav ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); 2416286705Smav err = receive_read(ra, sizeof (ra->next_rrd->header), 2417286705Smav &ra->next_rrd->header); 2418289362Smav ra->next_rrd->bytes_read = ra->bytes_read; 2419286705Smav if (err != 0) { 2420286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2421286705Smav ra->next_rrd = NULL; 2422286587Smav return (err); 2423286705Smav } 2424286705Smav if (ra->next_rrd->header.drr_type == DRR_BEGIN) { 2425286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2426286705Smav ra->next_rrd = NULL; 2427286587Smav return (SET_ERROR(EINVAL)); 2428286705Smav } 2429286587Smav 2430286587Smav /* 2431286587Smav * Note: checksum is of everything up to but not including the 2432286587Smav * checksum itself. 2433286587Smav */ 2434286587Smav ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2435286587Smav ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); 2436286705Smav receive_cksum(ra, 2437286587Smav offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), 2438286705Smav &ra->next_rrd->header); 2439286587Smav 2440286705Smav zio_cksum_t cksum_orig = 2441286705Smav ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2442286705Smav zio_cksum_t *cksump = 2443286705Smav &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; 2444286587Smav 2445286587Smav if (ra->byteswap) 2446286705Smav byteswap_record(&ra->next_rrd->header); 2447286587Smav 2448286587Smav if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && 2449286705Smav !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { 2450286705Smav kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); 2451286705Smav ra->next_rrd = NULL; 2452286587Smav return (SET_ERROR(ECKSUM)); 2453286705Smav } 2454286587Smav 2455286705Smav receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); 2456286587Smav 2457286587Smav return (0); 2458286587Smav} 2459286587Smav 2460294815Smavstatic void 2461294815Smavobjlist_create(struct objlist *list) 2462294815Smav{ 2463294815Smav list_create(&list->list, sizeof (struct receive_objnode), 2464294815Smav offsetof(struct receive_objnode, node)); 2465294815Smav list->last_lookup = 0; 2466294815Smav} 2467294815Smav 2468294815Smavstatic void 2469294815Smavobjlist_destroy(struct objlist *list) 2470294815Smav{ 2471294815Smav for (struct receive_objnode *n = list_remove_head(&list->list); 2472294815Smav n != NULL; n = list_remove_head(&list->list)) { 2473294815Smav kmem_free(n, sizeof (*n)); 2474294815Smav } 2475294815Smav list_destroy(&list->list); 2476294815Smav} 2477294815Smav 2478286705Smav/* 2479294815Smav * This function looks through the objlist to see if the specified object number 2480294815Smav * is contained in the objlist. In the process, it will remove all object 2481294815Smav * numbers in the list that are smaller than the specified object number. Thus, 2482294815Smav * any lookup of an object number smaller than a previously looked up object 2483294815Smav * number will always return false; therefore, all lookups should be done in 2484294815Smav * ascending order. 2485294815Smav */ 2486294815Smavstatic boolean_t 2487294815Smavobjlist_exists(struct objlist *list, uint64_t object) 2488294815Smav{ 2489294815Smav struct receive_objnode *node = list_head(&list->list); 2490294815Smav ASSERT3U(object, >=, list->last_lookup); 2491294815Smav list->last_lookup = object; 2492294815Smav while (node != NULL && node->object < object) { 2493294815Smav VERIFY3P(node, ==, list_remove_head(&list->list)); 2494294815Smav kmem_free(node, sizeof (*node)); 2495294815Smav node = list_head(&list->list); 2496294815Smav } 2497294815Smav return (node != NULL && node->object == object); 2498294815Smav} 2499294815Smav 2500294815Smav/* 2501294815Smav * The objlist is a list of object numbers stored in ascending order. However, 2502294815Smav * the insertion of new object numbers does not seek out the correct location to 2503294815Smav * store a new object number; instead, it appends it to the list for simplicity. 2504294815Smav * Thus, any users must take care to only insert new object numbers in ascending 2505294815Smav * order. 2506294815Smav */ 2507294815Smavstatic void 2508294815Smavobjlist_insert(struct objlist *list, uint64_t object) 2509294815Smav{ 2510294815Smav struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP); 2511294815Smav node->object = object; 2512294815Smav#ifdef ZFS_DEBUG 2513294815Smav struct receive_objnode *last_object = list_tail(&list->list); 2514294815Smav uint64_t last_objnum = (last_object != NULL ? last_object->object : 0); 2515294815Smav ASSERT3U(node->object, >, last_objnum); 2516294815Smav#endif 2517294815Smav list_insert_tail(&list->list, node); 2518294815Smav} 2519294815Smav 2520294815Smav/* 2521286705Smav * Issue the prefetch reads for any necessary indirect blocks. 2522286705Smav * 2523286705Smav * We use the object ignore list to tell us whether or not to issue prefetches 2524286705Smav * for a given object. We do this for both correctness (in case the blocksize 2525286705Smav * of an object has changed) and performance (if the object doesn't exist, don't 2526286705Smav * needlessly try to issue prefetches). We also trim the list as we go through 2527286705Smav * the stream to prevent it from growing to an unbounded size. 2528286705Smav * 2529286705Smav * The object numbers within will always be in sorted order, and any write 2530286705Smav * records we see will also be in sorted order, but they're not sorted with 2531286705Smav * respect to each other (i.e. we can get several object records before 2532286705Smav * receiving each object's write records). As a result, once we've reached a 2533286705Smav * given object number, we can safely remove any reference to lower object 2534286705Smav * numbers in the ignore list. In practice, we receive up to 32 object records 2535286705Smav * before receiving write records, so the list can have up to 32 nodes in it. 2536286705Smav */ 2537286705Smav/* ARGSUSED */ 2538286705Smavstatic void 2539286705Smavreceive_read_prefetch(struct receive_arg *ra, 2540286705Smav uint64_t object, uint64_t offset, uint64_t length) 2541286705Smav{ 2542294815Smav if (!objlist_exists(&ra->ignore_objlist, object)) { 2543286705Smav dmu_prefetch(ra->os, object, 1, offset, length, 2544286705Smav ZIO_PRIORITY_SYNC_READ); 2545286705Smav } 2546286705Smav} 2547286705Smav 2548286705Smav/* 2549286705Smav * Read records off the stream, issuing any necessary prefetches. 2550286705Smav */ 2551286587Smavstatic int 2552286705Smavreceive_read_record(struct receive_arg *ra) 2553286587Smav{ 2554286587Smav int err; 2555286587Smav 2556286705Smav switch (ra->rrd->header.drr_type) { 2557286587Smav case DRR_OBJECT: 2558286587Smav { 2559286705Smav struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; 2560286705Smav uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8); 2561286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2562286705Smav dmu_object_info_t doi; 2563286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2564286705Smav if (err != 0) { 2565286705Smav kmem_free(buf, size); 2566286587Smav return (err); 2567286705Smav } 2568286705Smav err = dmu_object_info(ra->os, drro->drr_object, &doi); 2569286705Smav /* 2570286705Smav * See receive_read_prefetch for an explanation why we're 2571286705Smav * storing this object in the ignore_obj_list. 2572286705Smav */ 2573286705Smav if (err == ENOENT || 2574286705Smav (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { 2575294815Smav objlist_insert(&ra->ignore_objlist, drro->drr_object); 2576286705Smav err = 0; 2577286705Smav } 2578286705Smav return (err); 2579286587Smav } 2580286587Smav case DRR_FREEOBJECTS: 2581286587Smav { 2582286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2583286705Smav return (err); 2584286587Smav } 2585286587Smav case DRR_WRITE: 2586286587Smav { 2587286705Smav struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; 2588286587Smav arc_buf_t *abuf = arc_loan_buf(dmu_objset_spa(ra->os), 2589286587Smav drrw->drr_length); 2590286587Smav 2591286705Smav err = receive_read_payload_and_next_header(ra, 2592286587Smav drrw->drr_length, abuf->b_data); 2593286705Smav if (err != 0) { 2594286705Smav dmu_return_arcbuf(abuf); 2595286587Smav return (err); 2596286705Smav } 2597286705Smav ra->rrd->write_buf = abuf; 2598286705Smav receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, 2599286705Smav drrw->drr_length); 2600286587Smav return (err); 2601286587Smav } 2602286587Smav case DRR_WRITE_BYREF: 2603286587Smav { 2604286705Smav struct drr_write_byref *drrwb = 2605286705Smav &ra->rrd->header.drr_u.drr_write_byref; 2606286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2607286705Smav receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, 2608286705Smav drrwb->drr_length); 2609286705Smav return (err); 2610286587Smav } 2611286587Smav case DRR_WRITE_EMBEDDED: 2612286587Smav { 2613286587Smav struct drr_write_embedded *drrwe = 2614286705Smav &ra->rrd->header.drr_u.drr_write_embedded; 2615286705Smav uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); 2616286705Smav void *buf = kmem_zalloc(size, KM_SLEEP); 2617286705Smav 2618286705Smav err = receive_read_payload_and_next_header(ra, size, buf); 2619286705Smav if (err != 0) { 2620286705Smav kmem_free(buf, size); 2621286587Smav return (err); 2622286705Smav } 2623286705Smav 2624286705Smav receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, 2625286705Smav drrwe->drr_length); 2626286705Smav return (err); 2627286587Smav } 2628286587Smav case DRR_FREE: 2629286587Smav { 2630286705Smav /* 2631286705Smav * It might be beneficial to prefetch indirect blocks here, but 2632286705Smav * we don't really have the data to decide for sure. 2633286705Smav */ 2634286705Smav err = receive_read_payload_and_next_header(ra, 0, NULL); 2635286705Smav return (err); 2636286587Smav } 2637286587Smav case DRR_END: 2638286587Smav { 2639286705Smav struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; 2640286587Smav if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) 2641289362Smav return (SET_ERROR(ECKSUM)); 2642286587Smav return (0); 2643286587Smav } 2644286587Smav case DRR_SPILL: 2645286587Smav { 2646286705Smav struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; 2647286705Smav void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP); 2648286705Smav err = receive_read_payload_and_next_header(ra, drrs->drr_length, 2649286705Smav buf); 2650286587Smav if (err != 0) 2651286705Smav kmem_free(buf, drrs->drr_length); 2652286705Smav return (err); 2653286587Smav } 2654286587Smav default: 2655286587Smav return (SET_ERROR(EINVAL)); 2656286587Smav } 2657286587Smav} 2658286587Smav 2659286587Smav/* 2660286705Smav * Commit the records to the pool. 2661286705Smav */ 2662286705Smavstatic int 2663286705Smavreceive_process_record(struct receive_writer_arg *rwa, 2664286705Smav struct receive_record_arg *rrd) 2665286705Smav{ 2666286705Smav int err; 2667286705Smav 2668289362Smav /* Processing in order, therefore bytes_read should be increasing. */ 2669289362Smav ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read); 2670289362Smav rwa->bytes_read = rrd->bytes_read; 2671289362Smav 2672286705Smav switch (rrd->header.drr_type) { 2673286705Smav case DRR_OBJECT: 2674286705Smav { 2675286705Smav struct drr_object *drro = &rrd->header.drr_u.drr_object; 2676286705Smav err = receive_object(rwa, drro, rrd->payload); 2677286705Smav kmem_free(rrd->payload, rrd->payload_size); 2678286705Smav rrd->payload = NULL; 2679286705Smav return (err); 2680286705Smav } 2681286705Smav case DRR_FREEOBJECTS: 2682286705Smav { 2683286705Smav struct drr_freeobjects *drrfo = 2684286705Smav &rrd->header.drr_u.drr_freeobjects; 2685286705Smav return (receive_freeobjects(rwa, drrfo)); 2686286705Smav } 2687286705Smav case DRR_WRITE: 2688286705Smav { 2689286705Smav struct drr_write *drrw = &rrd->header.drr_u.drr_write; 2690286705Smav err = receive_write(rwa, drrw, rrd->write_buf); 2691286705Smav /* if receive_write() is successful, it consumes the arc_buf */ 2692286705Smav if (err != 0) 2693286705Smav dmu_return_arcbuf(rrd->write_buf); 2694286705Smav rrd->write_buf = NULL; 2695286705Smav rrd->payload = NULL; 2696286705Smav return (err); 2697286705Smav } 2698286705Smav case DRR_WRITE_BYREF: 2699286705Smav { 2700286705Smav struct drr_write_byref *drrwbr = 2701286705Smav &rrd->header.drr_u.drr_write_byref; 2702286705Smav return (receive_write_byref(rwa, drrwbr)); 2703286705Smav } 2704286705Smav case DRR_WRITE_EMBEDDED: 2705286705Smav { 2706286705Smav struct drr_write_embedded *drrwe = 2707286705Smav &rrd->header.drr_u.drr_write_embedded; 2708286705Smav err = receive_write_embedded(rwa, drrwe, rrd->payload); 2709286705Smav kmem_free(rrd->payload, rrd->payload_size); 2710286705Smav rrd->payload = NULL; 2711286705Smav return (err); 2712286705Smav } 2713286705Smav case DRR_FREE: 2714286705Smav { 2715286705Smav struct drr_free *drrf = &rrd->header.drr_u.drr_free; 2716286705Smav return (receive_free(rwa, drrf)); 2717286705Smav } 2718286705Smav case DRR_SPILL: 2719286705Smav { 2720286705Smav struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; 2721286705Smav err = receive_spill(rwa, drrs, rrd->payload); 2722286705Smav kmem_free(rrd->payload, rrd->payload_size); 2723286705Smav rrd->payload = NULL; 2724286705Smav return (err); 2725286705Smav } 2726286705Smav default: 2727286705Smav return (SET_ERROR(EINVAL)); 2728286705Smav } 2729286705Smav} 2730286705Smav 2731286705Smav/* 2732286705Smav * dmu_recv_stream's worker thread; pull records off the queue, and then call 2733286705Smav * receive_process_record When we're done, signal the main thread and exit. 2734286705Smav */ 2735286705Smavstatic void 2736286705Smavreceive_writer_thread(void *arg) 2737286705Smav{ 2738286705Smav struct receive_writer_arg *rwa = arg; 2739286705Smav struct receive_record_arg *rrd; 2740286705Smav for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; 2741286705Smav rrd = bqueue_dequeue(&rwa->q)) { 2742286705Smav /* 2743286705Smav * If there's an error, the main thread will stop putting things 2744286705Smav * on the queue, but we need to clear everything in it before we 2745286705Smav * can exit. 2746286705Smav */ 2747286705Smav if (rwa->err == 0) { 2748286705Smav rwa->err = receive_process_record(rwa, rrd); 2749286705Smav } else if (rrd->write_buf != NULL) { 2750286705Smav dmu_return_arcbuf(rrd->write_buf); 2751286705Smav rrd->write_buf = NULL; 2752286705Smav rrd->payload = NULL; 2753286705Smav } else if (rrd->payload != NULL) { 2754286705Smav kmem_free(rrd->payload, rrd->payload_size); 2755286705Smav rrd->payload = NULL; 2756286705Smav } 2757286705Smav kmem_free(rrd, sizeof (*rrd)); 2758286705Smav } 2759286705Smav kmem_free(rrd, sizeof (*rrd)); 2760286705Smav mutex_enter(&rwa->mutex); 2761286705Smav rwa->done = B_TRUE; 2762286705Smav cv_signal(&rwa->cv); 2763286705Smav mutex_exit(&rwa->mutex); 2764286705Smav thread_exit(); 2765286705Smav} 2766286705Smav 2767289362Smavstatic int 2768289362Smavresume_check(struct receive_arg *ra, nvlist_t *begin_nvl) 2769289362Smav{ 2770289362Smav uint64_t val; 2771289362Smav objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset; 2772289362Smav uint64_t dsobj = dmu_objset_id(ra->os); 2773289362Smav uint64_t resume_obj, resume_off; 2774289362Smav 2775289362Smav if (nvlist_lookup_uint64(begin_nvl, 2776289362Smav "resume_object", &resume_obj) != 0 || 2777289362Smav nvlist_lookup_uint64(begin_nvl, 2778289362Smav "resume_offset", &resume_off) != 0) { 2779289362Smav return (SET_ERROR(EINVAL)); 2780289362Smav } 2781289362Smav VERIFY0(zap_lookup(mos, dsobj, 2782289362Smav DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val)); 2783289362Smav if (resume_obj != val) 2784289362Smav return (SET_ERROR(EINVAL)); 2785289362Smav VERIFY0(zap_lookup(mos, dsobj, 2786289362Smav DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val)); 2787289362Smav if (resume_off != val) 2788289362Smav return (SET_ERROR(EINVAL)); 2789289362Smav 2790289362Smav return (0); 2791289362Smav} 2792289362Smav 2793286705Smav/* 2794286705Smav * Read in the stream's records, one by one, and apply them to the pool. There 2795286705Smav * are two threads involved; the thread that calls this function will spin up a 2796286705Smav * worker thread, read the records off the stream one by one, and issue 2797286705Smav * prefetches for any necessary indirect blocks. It will then push the records 2798286705Smav * onto an internal blocking queue. The worker thread will pull the records off 2799286705Smav * the queue, and actually write the data into the DMU. This way, the worker 2800286705Smav * thread doesn't have to wait for reads to complete, since everything it needs 2801286705Smav * (the indirect blocks) will be prefetched. 2802286705Smav * 2803185029Spjd * NB: callers *must* call dmu_recv_end() if this succeeds. 2804185029Spjd */ 2805168404Spjdint 2806219089Spjddmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp, 2807219089Spjd int cleanup_fd, uint64_t *action_handlep) 2808168404Spjd{ 2809286587Smav int err = 0; 2810286705Smav struct receive_arg ra = { 0 }; 2811286705Smav struct receive_writer_arg rwa = { 0 }; 2812219089Spjd int featureflags; 2813289362Smav nvlist_t *begin_nvl = NULL; 2814168404Spjd 2815248571Smm ra.byteswap = drc->drc_byteswap; 2816248571Smm ra.cksum = drc->drc_cksum; 2817219089Spjd ra.td = curthread; 2818185029Spjd ra.fp = fp; 2819185029Spjd ra.voff = *voffp; 2820289362Smav 2821289362Smav if (dsl_dataset_is_zapified(drc->drc_ds)) { 2822289362Smav (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset, 2823289362Smav drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES, 2824289362Smav sizeof (ra.bytes_read), 1, &ra.bytes_read); 2825289362Smav } 2826289362Smav 2827294815Smav objlist_create(&ra.ignore_objlist); 2828168404Spjd 2829185029Spjd /* these were verified in dmu_recv_begin */ 2830248571Smm ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, 2831219089Spjd DMU_SUBSTREAM); 2832248571Smm ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); 2833168404Spjd 2834168404Spjd /* 2835168404Spjd * Open the objset we are modifying. 2836168404Spjd */ 2837286587Smav VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra.os)); 2838168404Spjd 2839275782Sdelphij ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); 2840168404Spjd 2841219089Spjd featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); 2842219089Spjd 2843219089Spjd /* if this stream is dedup'ed, set up the avl tree for guid mapping */ 2844219089Spjd if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { 2845219089Spjd minor_t minor; 2846219089Spjd 2847219089Spjd if (cleanup_fd == -1) { 2848249195Smm ra.err = SET_ERROR(EBADF); 2849219089Spjd goto out; 2850219089Spjd } 2851219089Spjd ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); 2852248571Smm if (ra.err != 0) { 2853219089Spjd cleanup_fd = -1; 2854219089Spjd goto out; 2855219089Spjd } 2856219089Spjd 2857219089Spjd if (*action_handlep == 0) { 2858286705Smav rwa.guid_to_ds_map = 2859219089Spjd kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); 2860286705Smav avl_create(rwa.guid_to_ds_map, guid_compare, 2861219089Spjd sizeof (guid_map_entry_t), 2862219089Spjd offsetof(guid_map_entry_t, avlnode)); 2863286587Smav err = zfs_onexit_add_cb(minor, 2864286705Smav free_guid_map_onexit, rwa.guid_to_ds_map, 2865219089Spjd action_handlep); 2866248571Smm if (ra.err != 0) 2867219089Spjd goto out; 2868219089Spjd } else { 2869286587Smav err = zfs_onexit_cb_data(minor, *action_handlep, 2870286705Smav (void **)&rwa.guid_to_ds_map); 2871248571Smm if (ra.err != 0) 2872219089Spjd goto out; 2873219089Spjd } 2874221263Smm 2875286705Smav drc->drc_guid_to_ds_map = rwa.guid_to_ds_map; 2876219089Spjd } 2877219089Spjd 2878289362Smav uint32_t payloadlen = drc->drc_drr_begin->drr_payloadlen; 2879289362Smav void *payload = NULL; 2880289362Smav if (payloadlen != 0) 2881289362Smav payload = kmem_alloc(payloadlen, KM_SLEEP); 2882289362Smav 2883289362Smav err = receive_read_payload_and_next_header(&ra, payloadlen, payload); 2884289362Smav if (err != 0) { 2885289362Smav if (payloadlen != 0) 2886289362Smav kmem_free(payload, payloadlen); 2887286587Smav goto out; 2888289362Smav } 2889289362Smav if (payloadlen != 0) { 2890289362Smav err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP); 2891289362Smav kmem_free(payload, payloadlen); 2892289362Smav if (err != 0) 2893289362Smav goto out; 2894289362Smav } 2895286587Smav 2896289362Smav if (featureflags & DMU_BACKUP_FEATURE_RESUMING) { 2897289362Smav err = resume_check(&ra, begin_nvl); 2898289362Smav if (err != 0) 2899289362Smav goto out; 2900289362Smav } 2901289362Smav 2902286705Smav (void) bqueue_init(&rwa.q, zfs_recv_queue_length, 2903286705Smav offsetof(struct receive_record_arg, node)); 2904286705Smav cv_init(&rwa.cv, NULL, CV_DEFAULT, NULL); 2905286705Smav mutex_init(&rwa.mutex, NULL, MUTEX_DEFAULT, NULL); 2906286705Smav rwa.os = ra.os; 2907286705Smav rwa.byteswap = drc->drc_byteswap; 2908289362Smav rwa.resumable = drc->drc_resumable; 2909286705Smav 2910287280Sdelphij (void) thread_create(NULL, 0, receive_writer_thread, &rwa, 0, &p0, 2911286705Smav TS_RUN, minclsyspri); 2912286705Smav /* 2913286705Smav * We're reading rwa.err without locks, which is safe since we are the 2914286705Smav * only reader, and the worker thread is the only writer. It's ok if we 2915286705Smav * miss a write for an iteration or two of the loop, since the writer 2916286705Smav * thread will keep freeing records we send it until we send it an eos 2917286705Smav * marker. 2918286705Smav * 2919286705Smav * We can leave this loop in 3 ways: First, if rwa.err is 2920286705Smav * non-zero. In that case, the writer thread will free the rrd we just 2921286705Smav * pushed. Second, if we're interrupted; in that case, either it's the 2922286705Smav * first loop and ra.rrd was never allocated, or it's later, and ra.rrd 2923286705Smav * has been handed off to the writer thread who will free it. Finally, 2924286705Smav * if receive_read_record fails or we're at the end of the stream, then 2925286705Smav * we free ra.rrd and exit. 2926286705Smav */ 2927286705Smav while (rwa.err == 0) { 2928185029Spjd if (issig(JUSTLOOKING) && issig(FORREAL)) { 2929286587Smav err = SET_ERROR(EINTR); 2930286587Smav break; 2931168404Spjd } 2932168404Spjd 2933286705Smav ASSERT3P(ra.rrd, ==, NULL); 2934286705Smav ra.rrd = ra.next_rrd; 2935286705Smav ra.next_rrd = NULL; 2936286705Smav /* Allocates and loads header into ra.next_rrd */ 2937286705Smav err = receive_read_record(&ra); 2938168404Spjd 2939286705Smav if (ra.rrd->header.drr_type == DRR_END || err != 0) { 2940286705Smav kmem_free(ra.rrd, sizeof (*ra.rrd)); 2941286705Smav ra.rrd = NULL; 2942168404Spjd break; 2943286705Smav } 2944286705Smav 2945286705Smav bqueue_enqueue(&rwa.q, ra.rrd, 2946286705Smav sizeof (struct receive_record_arg) + ra.rrd->payload_size); 2947286705Smav ra.rrd = NULL; 2948168404Spjd } 2949286705Smav if (ra.next_rrd == NULL) 2950286705Smav ra.next_rrd = kmem_zalloc(sizeof (*ra.next_rrd), KM_SLEEP); 2951286705Smav ra.next_rrd->eos_marker = B_TRUE; 2952286705Smav bqueue_enqueue(&rwa.q, ra.next_rrd, 1); 2953168404Spjd 2954286705Smav mutex_enter(&rwa.mutex); 2955286705Smav while (!rwa.done) { 2956286705Smav cv_wait(&rwa.cv, &rwa.mutex); 2957286705Smav } 2958286705Smav mutex_exit(&rwa.mutex); 2959286705Smav 2960286705Smav cv_destroy(&rwa.cv); 2961286705Smav mutex_destroy(&rwa.mutex); 2962286705Smav bqueue_destroy(&rwa.q); 2963286705Smav if (err == 0) 2964286705Smav err = rwa.err; 2965286705Smav 2966168404Spjdout: 2967289362Smav nvlist_free(begin_nvl); 2968219089Spjd if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) 2969219089Spjd zfs_onexit_fd_rele(cleanup_fd); 2970168404Spjd 2971286587Smav if (err != 0) { 2972168404Spjd /* 2973289362Smav * Clean up references. If receive is not resumable, 2974289362Smav * destroy what we created, so we don't leave it in 2975289362Smav * the inconsistent state. 2976168404Spjd */ 2977248571Smm dmu_recv_cleanup_ds(drc); 2978168404Spjd } 2979168404Spjd 2980185029Spjd *voffp = ra.voff; 2981294815Smav objlist_destroy(&ra.ignore_objlist); 2982286587Smav return (err); 2983168404Spjd} 2984185029Spjd 2985185029Spjdstatic int 2986248571Smmdmu_recv_end_check(void *arg, dmu_tx_t *tx) 2987185029Spjd{ 2988248571Smm dmu_recv_cookie_t *drc = arg; 2989248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 2990248571Smm int error; 2991185029Spjd 2992248571Smm ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); 2993248571Smm 2994248571Smm if (!drc->drc_newfs) { 2995248571Smm dsl_dataset_t *origin_head; 2996248571Smm 2997248571Smm error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); 2998248571Smm if (error != 0) 2999248571Smm return (error); 3000253820Sdelphij if (drc->drc_force) { 3001253820Sdelphij /* 3002253820Sdelphij * We will destroy any snapshots in tofs (i.e. before 3003253820Sdelphij * origin_head) that are after the origin (which is 3004253820Sdelphij * the snap before drc_ds, because drc_ds can not 3005253820Sdelphij * have any snaps of its own). 3006253820Sdelphij */ 3007275782Sdelphij uint64_t obj; 3008275782Sdelphij 3009275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3010275782Sdelphij while (obj != 3011275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 3012253820Sdelphij dsl_dataset_t *snap; 3013253820Sdelphij error = dsl_dataset_hold_obj(dp, obj, FTAG, 3014253820Sdelphij &snap); 3015253820Sdelphij if (error != 0) 3016282473Savg break; 3017253820Sdelphij if (snap->ds_dir != origin_head->ds_dir) 3018253820Sdelphij error = SET_ERROR(EINVAL); 3019253820Sdelphij if (error == 0) { 3020253820Sdelphij error = dsl_destroy_snapshot_check_impl( 3021253820Sdelphij snap, B_FALSE); 3022253820Sdelphij } 3023275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3024253820Sdelphij dsl_dataset_rele(snap, FTAG); 3025253820Sdelphij if (error != 0) 3026282473Savg break; 3027253820Sdelphij } 3028282473Savg if (error != 0) { 3029282473Savg dsl_dataset_rele(origin_head, FTAG); 3030282473Savg return (error); 3031282473Savg } 3032253820Sdelphij } 3033248571Smm error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, 3034253816Sdelphij origin_head, drc->drc_force, drc->drc_owner, tx); 3035248571Smm if (error != 0) { 3036248571Smm dsl_dataset_rele(origin_head, FTAG); 3037248571Smm return (error); 3038248571Smm } 3039248571Smm error = dsl_dataset_snapshot_check_impl(origin_head, 3040264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 3041248571Smm dsl_dataset_rele(origin_head, FTAG); 3042248571Smm if (error != 0) 3043248571Smm return (error); 3044248571Smm 3045248571Smm error = dsl_destroy_head_check_impl(drc->drc_ds, 1); 3046248571Smm } else { 3047248571Smm error = dsl_dataset_snapshot_check_impl(drc->drc_ds, 3048264835Sdelphij drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); 3049248571Smm } 3050248571Smm return (error); 3051185029Spjd} 3052185029Spjd 3053185029Spjdstatic void 3054248571Smmdmu_recv_end_sync(void *arg, dmu_tx_t *tx) 3055185029Spjd{ 3056248571Smm dmu_recv_cookie_t *drc = arg; 3057248571Smm dsl_pool_t *dp = dmu_tx_pool(tx); 3058185029Spjd 3059248571Smm spa_history_log_internal_ds(drc->drc_ds, "finish receiving", 3060248571Smm tx, "snap=%s", drc->drc_tosnap); 3061185029Spjd 3062248571Smm if (!drc->drc_newfs) { 3063248571Smm dsl_dataset_t *origin_head; 3064185029Spjd 3065248571Smm VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, 3066248571Smm &origin_head)); 3067253820Sdelphij 3068253820Sdelphij if (drc->drc_force) { 3069253820Sdelphij /* 3070253820Sdelphij * Destroy any snapshots of drc_tofs (origin_head) 3071253820Sdelphij * after the origin (the snap before drc_ds). 3072253820Sdelphij */ 3073275782Sdelphij uint64_t obj; 3074275782Sdelphij 3075275782Sdelphij obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; 3076275782Sdelphij while (obj != 3077275782Sdelphij dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { 3078253820Sdelphij dsl_dataset_t *snap; 3079253820Sdelphij VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, 3080253820Sdelphij &snap)); 3081253820Sdelphij ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); 3082275782Sdelphij obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; 3083253820Sdelphij dsl_destroy_snapshot_sync_impl(snap, 3084253820Sdelphij B_FALSE, tx); 3085253820Sdelphij dsl_dataset_rele(snap, FTAG); 3086253820Sdelphij } 3087253820Sdelphij } 3088253820Sdelphij VERIFY3P(drc->drc_ds->ds_prev, ==, 3089253820Sdelphij origin_head->ds_prev); 3090253820Sdelphij 3091248571Smm dsl_dataset_clone_swap_sync_impl(drc->drc_ds, 3092248571Smm origin_head, tx); 3093248571Smm dsl_dataset_snapshot_sync_impl(origin_head, 3094248571Smm drc->drc_tosnap, tx); 3095248571Smm 3096248571Smm /* set snapshot's creation time and guid */ 3097248571Smm dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); 3098275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = 3099248571Smm drc->drc_drrb->drr_creation_time; 3100275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_guid = 3101248571Smm drc->drc_drrb->drr_toguid; 3102275782Sdelphij dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= 3103248571Smm ~DS_FLAG_INCONSISTENT; 3104248571Smm 3105248571Smm dmu_buf_will_dirty(origin_head->ds_dbuf, tx); 3106275782Sdelphij dsl_dataset_phys(origin_head)->ds_flags &= 3107275782Sdelphij ~DS_FLAG_INCONSISTENT; 3108248571Smm 3109248571Smm dsl_dataset_rele(origin_head, FTAG); 3110248571Smm dsl_destroy_head_sync_impl(drc->drc_ds, tx); 3111253816Sdelphij 3112253816Sdelphij if (drc->drc_owner != NULL) 3113253816Sdelphij VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); 3114248571Smm } else { 3115248571Smm dsl_dataset_t *ds = drc->drc_ds; 3116248571Smm 3117248571Smm dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); 3118248571Smm 3119248571Smm /* set snapshot's creation time and guid */ 3120248571Smm dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); 3121275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_creation_time = 3122248571Smm drc->drc_drrb->drr_creation_time; 3123275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_guid = 3124275782Sdelphij drc->drc_drrb->drr_toguid; 3125275782Sdelphij dsl_dataset_phys(ds->ds_prev)->ds_flags &= 3126275782Sdelphij ~DS_FLAG_INCONSISTENT; 3127248571Smm 3128248571Smm dmu_buf_will_dirty(ds->ds_dbuf, tx); 3129275782Sdelphij dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; 3130289362Smav if (dsl_dataset_has_resume_receive_state(ds)) { 3131289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3132289362Smav DS_FIELD_RESUME_FROMGUID, tx); 3133289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3134289362Smav DS_FIELD_RESUME_OBJECT, tx); 3135289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3136289362Smav DS_FIELD_RESUME_OFFSET, tx); 3137289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3138289362Smav DS_FIELD_RESUME_BYTES, tx); 3139289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3140289362Smav DS_FIELD_RESUME_TOGUID, tx); 3141289362Smav (void) zap_remove(dp->dp_meta_objset, ds->ds_object, 3142289362Smav DS_FIELD_RESUME_TONAME, tx); 3143289362Smav } 3144248571Smm } 3145275782Sdelphij drc->drc_newsnapobj = dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; 3146248571Smm /* 3147248571Smm * Release the hold from dmu_recv_begin. This must be done before 3148248571Smm * we return to open context, so that when we free the dataset's dnode, 3149248571Smm * we can evict its bonus buffer. 3150248571Smm */ 3151248571Smm dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); 3152248571Smm drc->drc_ds = NULL; 3153185029Spjd} 3154185029Spjd 3155219089Spjdstatic int 3156248571Smmadd_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) 3157221263Smm{ 3158248571Smm dsl_pool_t *dp; 3159221263Smm dsl_dataset_t *snapds; 3160221263Smm guid_map_entry_t *gmep; 3161221263Smm int err; 3162221263Smm 3163221263Smm ASSERT(guid_map != NULL); 3164221263Smm 3165248571Smm err = dsl_pool_hold(name, FTAG, &dp); 3166248571Smm if (err != 0) 3167248571Smm return (err); 3168249356Smm gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); 3169249196Smm err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); 3170221263Smm if (err == 0) { 3171275782Sdelphij gmep->guid = dsl_dataset_phys(snapds)->ds_guid; 3172221263Smm gmep->gme_ds = snapds; 3173221263Smm avl_add(guid_map, gmep); 3174248571Smm dsl_dataset_long_hold(snapds, gmep); 3175249196Smm } else 3176249356Smm kmem_free(gmep, sizeof (*gmep)); 3177221263Smm 3178248571Smm dsl_pool_rele(dp, FTAG); 3179221263Smm return (err); 3180221263Smm} 3181221263Smm 3182248571Smmstatic int dmu_recv_end_modified_blocks = 3; 3183248571Smm 3184221263Smmstatic int 3185219089Spjddmu_recv_existing_end(dmu_recv_cookie_t *drc) 3186185029Spjd{ 3187248571Smm int error; 3188185029Spjd 3189248571Smm#ifdef _KERNEL 3190248571Smm /* 3191248571Smm * We will be destroying the ds; make sure its origin is unmounted if 3192248571Smm * necessary. 3193248571Smm */ 3194307108Smav char name[ZFS_MAX_DATASET_NAME_LEN]; 3195248571Smm dsl_dataset_name(drc->drc_ds, name); 3196248571Smm zfs_destroy_unmount_origin(name); 3197248571Smm#endif 3198185029Spjd 3199248571Smm error = dsl_sync_task(drc->drc_tofs, 3200248571Smm dmu_recv_end_check, dmu_recv_end_sync, drc, 3201268473Sdelphij dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); 3202185029Spjd 3203248571Smm if (error != 0) 3204248571Smm dmu_recv_cleanup_ds(drc); 3205248571Smm return (error); 3206185029Spjd} 3207219089Spjd 3208219089Spjdstatic int 3209219089Spjddmu_recv_new_end(dmu_recv_cookie_t *drc) 3210219089Spjd{ 3211248571Smm int error; 3212219089Spjd 3213248571Smm error = dsl_sync_task(drc->drc_tofs, 3214248571Smm dmu_recv_end_check, dmu_recv_end_sync, drc, 3215268473Sdelphij dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); 3216219089Spjd 3217248571Smm if (error != 0) { 3218248571Smm dmu_recv_cleanup_ds(drc); 3219248571Smm } else if (drc->drc_guid_to_ds_map != NULL) { 3220248571Smm (void) add_ds_to_guidmap(drc->drc_tofs, 3221248571Smm drc->drc_guid_to_ds_map, 3222248571Smm drc->drc_newsnapobj); 3223219089Spjd } 3224248571Smm return (error); 3225219089Spjd} 3226219089Spjd 3227219089Spjdint 3228253816Sdelphijdmu_recv_end(dmu_recv_cookie_t *drc, void *owner) 3229219089Spjd{ 3230253816Sdelphij drc->drc_owner = owner; 3231253816Sdelphij 3232248571Smm if (drc->drc_newfs) 3233248571Smm return (dmu_recv_new_end(drc)); 3234248571Smm else 3235219089Spjd return (dmu_recv_existing_end(drc)); 3236219089Spjd} 3237253821Sdelphij 3238253821Sdelphij/* 3239253821Sdelphij * Return TRUE if this objset is currently being received into. 3240253821Sdelphij */ 3241253821Sdelphijboolean_t 3242253821Sdelphijdmu_objset_is_receiving(objset_t *os) 3243253821Sdelphij{ 3244253821Sdelphij return (os->os_dsl_dataset != NULL && 3245253821Sdelphij os->os_dsl_dataset->ds_owner == dmu_recv_tag); 3246253821Sdelphij} 3247