libzfs_sendrecv.c revision 238422
1185029Spjd/* 2185029Spjd * CDDL HEADER START 3185029Spjd * 4185029Spjd * The contents of this file are subject to the terms of the 5185029Spjd * Common Development and Distribution License (the "License"). 6185029Spjd * You may not use this file except in compliance with the License. 7185029Spjd * 8185029Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9185029Spjd * or http://www.opensolaris.org/os/licensing. 10185029Spjd * See the License for the specific language governing permissions 11185029Spjd * and limitations under the License. 12185029Spjd * 13185029Spjd * When distributing Covered Code, include this CDDL HEADER in each 14185029Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15185029Spjd * If applicable, add the following below this CDDL HEADER, with the 16185029Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17185029Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18185029Spjd * 19185029Spjd * CDDL HEADER END 20185029Spjd */ 21185029Spjd 22185029Spjd/* 23219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24238422Smm * Copyright (c) 2012 by Delphix. All rights reserved. 25235222Smm * Copyright (c) 2012, Joyent, Inc. All rights reserved. 26230438Spjd * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 27230438Spjd * All rights reserved. 28185029Spjd */ 29185029Spjd 30185029Spjd#include <assert.h> 31185029Spjd#include <ctype.h> 32185029Spjd#include <errno.h> 33185029Spjd#include <libintl.h> 34185029Spjd#include <stdio.h> 35185029Spjd#include <stdlib.h> 36185029Spjd#include <strings.h> 37185029Spjd#include <unistd.h> 38185029Spjd#include <stddef.h> 39185029Spjd#include <fcntl.h> 40186515Srwatson#include <sys/param.h> 41185029Spjd#include <sys/mount.h> 42219089Spjd#include <pthread.h> 43219089Spjd#include <umem.h> 44235222Smm#include <time.h> 45185029Spjd 46185029Spjd#include <libzfs.h> 47185029Spjd 48185029Spjd#include "zfs_namecheck.h" 49185029Spjd#include "zfs_prop.h" 50219089Spjd#include "zfs_fletcher.h" 51185029Spjd#include "libzfs_impl.h" 52219089Spjd#include <sha2.h> 53219089Spjd#include <sys/zio_checksum.h> 54219089Spjd#include <sys/ddt.h> 55185029Spjd 56219089Spjd/* in libzfs_dataset.c */ 57219089Spjdextern void zfs_setprop_error(libzfs_handle_t *, zfs_prop_t, int, char *); 58185029Spjd/* We need to use something for ENODATA. */ 59185029Spjd#define ENODATA EIDRM 60185029Spjd 61228103Smmstatic int zfs_receive_impl(libzfs_handle_t *, const char *, recvflags_t *, 62219089Spjd int, const char *, nvlist_t *, avl_tree_t *, char **, int, uint64_t *); 63185029Spjd 64219089Spjdstatic const zio_cksum_t zero_cksum = { 0 }; 65219089Spjd 66219089Spjdtypedef struct dedup_arg { 67219089Spjd int inputfd; 68219089Spjd int outputfd; 69219089Spjd libzfs_handle_t *dedup_hdl; 70219089Spjd} dedup_arg_t; 71219089Spjd 72235222Smmtypedef struct progress_arg { 73235222Smm zfs_handle_t *pa_zhp; 74235222Smm int pa_fd; 75235222Smm boolean_t pa_parsable; 76235222Smm} progress_arg_t; 77235222Smm 78219089Spjdtypedef struct dataref { 79219089Spjd uint64_t ref_guid; 80219089Spjd uint64_t ref_object; 81219089Spjd uint64_t ref_offset; 82219089Spjd} dataref_t; 83219089Spjd 84219089Spjdtypedef struct dedup_entry { 85219089Spjd struct dedup_entry *dde_next; 86219089Spjd zio_cksum_t dde_chksum; 87219089Spjd uint64_t dde_prop; 88219089Spjd dataref_t dde_ref; 89219089Spjd} dedup_entry_t; 90219089Spjd 91219089Spjd#define MAX_DDT_PHYSMEM_PERCENT 20 92219089Spjd#define SMALLEST_POSSIBLE_MAX_DDT_MB 128 93219089Spjd 94219089Spjdtypedef struct dedup_table { 95219089Spjd dedup_entry_t **dedup_hash_array; 96219089Spjd umem_cache_t *ddecache; 97219089Spjd uint64_t max_ddt_size; /* max dedup table size in bytes */ 98219089Spjd uint64_t cur_ddt_size; /* current dedup table size in bytes */ 99219089Spjd uint64_t ddt_count; 100219089Spjd int numhashbits; 101219089Spjd boolean_t ddt_full; 102219089Spjd} dedup_table_t; 103219089Spjd 104219089Spjdstatic int 105219089Spjdhigh_order_bit(uint64_t n) 106219089Spjd{ 107219089Spjd int count; 108219089Spjd 109219089Spjd for (count = 0; n != 0; count++) 110219089Spjd n >>= 1; 111219089Spjd return (count); 112219089Spjd} 113219089Spjd 114219089Spjdstatic size_t 115219089Spjdssread(void *buf, size_t len, FILE *stream) 116219089Spjd{ 117219089Spjd size_t outlen; 118219089Spjd 119219089Spjd if ((outlen = fread(buf, len, 1, stream)) == 0) 120219089Spjd return (0); 121219089Spjd 122219089Spjd return (outlen); 123219089Spjd} 124219089Spjd 125219089Spjdstatic void 126219089Spjdddt_hash_append(libzfs_handle_t *hdl, dedup_table_t *ddt, dedup_entry_t **ddepp, 127219089Spjd zio_cksum_t *cs, uint64_t prop, dataref_t *dr) 128219089Spjd{ 129219089Spjd dedup_entry_t *dde; 130219089Spjd 131219089Spjd if (ddt->cur_ddt_size >= ddt->max_ddt_size) { 132219089Spjd if (ddt->ddt_full == B_FALSE) { 133219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 134219089Spjd "Dedup table full. Deduplication will continue " 135219089Spjd "with existing table entries")); 136219089Spjd ddt->ddt_full = B_TRUE; 137219089Spjd } 138219089Spjd return; 139219089Spjd } 140219089Spjd 141219089Spjd if ((dde = umem_cache_alloc(ddt->ddecache, UMEM_DEFAULT)) 142219089Spjd != NULL) { 143219089Spjd assert(*ddepp == NULL); 144219089Spjd dde->dde_next = NULL; 145219089Spjd dde->dde_chksum = *cs; 146219089Spjd dde->dde_prop = prop; 147219089Spjd dde->dde_ref = *dr; 148219089Spjd *ddepp = dde; 149219089Spjd ddt->cur_ddt_size += sizeof (dedup_entry_t); 150219089Spjd ddt->ddt_count++; 151219089Spjd } 152219089Spjd} 153219089Spjd 154185029Spjd/* 155219089Spjd * Using the specified dedup table, do a lookup for an entry with 156219089Spjd * the checksum cs. If found, return the block's reference info 157219089Spjd * in *dr. Otherwise, insert a new entry in the dedup table, using 158219089Spjd * the reference information specified by *dr. 159219089Spjd * 160219089Spjd * return value: true - entry was found 161219089Spjd * false - entry was not found 162219089Spjd */ 163219089Spjdstatic boolean_t 164219089Spjdddt_update(libzfs_handle_t *hdl, dedup_table_t *ddt, zio_cksum_t *cs, 165219089Spjd uint64_t prop, dataref_t *dr) 166219089Spjd{ 167219089Spjd uint32_t hashcode; 168219089Spjd dedup_entry_t **ddepp; 169219089Spjd 170219089Spjd hashcode = BF64_GET(cs->zc_word[0], 0, ddt->numhashbits); 171219089Spjd 172219089Spjd for (ddepp = &(ddt->dedup_hash_array[hashcode]); *ddepp != NULL; 173219089Spjd ddepp = &((*ddepp)->dde_next)) { 174219089Spjd if (ZIO_CHECKSUM_EQUAL(((*ddepp)->dde_chksum), *cs) && 175219089Spjd (*ddepp)->dde_prop == prop) { 176219089Spjd *dr = (*ddepp)->dde_ref; 177219089Spjd return (B_TRUE); 178219089Spjd } 179219089Spjd } 180219089Spjd ddt_hash_append(hdl, ddt, ddepp, cs, prop, dr); 181219089Spjd return (B_FALSE); 182219089Spjd} 183219089Spjd 184219089Spjdstatic int 185219089Spjdcksum_and_write(const void *buf, uint64_t len, zio_cksum_t *zc, int outfd) 186219089Spjd{ 187219089Spjd fletcher_4_incremental_native(buf, len, zc); 188219089Spjd return (write(outfd, buf, len)); 189219089Spjd} 190219089Spjd 191219089Spjd/* 192219089Spjd * This function is started in a separate thread when the dedup option 193219089Spjd * has been requested. The main send thread determines the list of 194219089Spjd * snapshots to be included in the send stream and makes the ioctl calls 195219089Spjd * for each one. But instead of having the ioctl send the output to the 196219089Spjd * the output fd specified by the caller of zfs_send()), the 197219089Spjd * ioctl is told to direct the output to a pipe, which is read by the 198219089Spjd * alternate thread running THIS function. This function does the 199219089Spjd * dedup'ing by: 200219089Spjd * 1. building a dedup table (the DDT) 201219089Spjd * 2. doing checksums on each data block and inserting a record in the DDT 202219089Spjd * 3. looking for matching checksums, and 203219089Spjd * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever 204219089Spjd * a duplicate block is found. 205219089Spjd * The output of this function then goes to the output fd requested 206219089Spjd * by the caller of zfs_send(). 207219089Spjd */ 208219089Spjdstatic void * 209219089Spjdcksummer(void *arg) 210219089Spjd{ 211219089Spjd dedup_arg_t *dda = arg; 212219089Spjd char *buf = malloc(1<<20); 213219089Spjd dmu_replay_record_t thedrr; 214219089Spjd dmu_replay_record_t *drr = &thedrr; 215219089Spjd struct drr_begin *drrb = &thedrr.drr_u.drr_begin; 216219089Spjd struct drr_end *drre = &thedrr.drr_u.drr_end; 217219089Spjd struct drr_object *drro = &thedrr.drr_u.drr_object; 218219089Spjd struct drr_write *drrw = &thedrr.drr_u.drr_write; 219219089Spjd struct drr_spill *drrs = &thedrr.drr_u.drr_spill; 220219089Spjd FILE *ofp; 221219089Spjd int outfd; 222219089Spjd dmu_replay_record_t wbr_drr = {0}; 223219089Spjd struct drr_write_byref *wbr_drrr = &wbr_drr.drr_u.drr_write_byref; 224219089Spjd dedup_table_t ddt; 225219089Spjd zio_cksum_t stream_cksum; 226219089Spjd uint64_t physmem = sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE); 227219089Spjd uint64_t numbuckets; 228219089Spjd 229219089Spjd ddt.max_ddt_size = 230219089Spjd MAX((physmem * MAX_DDT_PHYSMEM_PERCENT)/100, 231219089Spjd SMALLEST_POSSIBLE_MAX_DDT_MB<<20); 232219089Spjd 233219089Spjd numbuckets = ddt.max_ddt_size/(sizeof (dedup_entry_t)); 234219089Spjd 235219089Spjd /* 236219089Spjd * numbuckets must be a power of 2. Increase number to 237219089Spjd * a power of 2 if necessary. 238219089Spjd */ 239219089Spjd if (!ISP2(numbuckets)) 240219089Spjd numbuckets = 1 << high_order_bit(numbuckets); 241219089Spjd 242219089Spjd ddt.dedup_hash_array = calloc(numbuckets, sizeof (dedup_entry_t *)); 243219089Spjd ddt.ddecache = umem_cache_create("dde", sizeof (dedup_entry_t), 0, 244219089Spjd NULL, NULL, NULL, NULL, NULL, 0); 245219089Spjd ddt.cur_ddt_size = numbuckets * sizeof (dedup_entry_t *); 246219089Spjd ddt.numhashbits = high_order_bit(numbuckets) - 1; 247219089Spjd ddt.ddt_full = B_FALSE; 248219089Spjd 249219089Spjd /* Initialize the write-by-reference block. */ 250219089Spjd wbr_drr.drr_type = DRR_WRITE_BYREF; 251219089Spjd wbr_drr.drr_payloadlen = 0; 252219089Spjd 253219089Spjd outfd = dda->outputfd; 254219089Spjd ofp = fdopen(dda->inputfd, "r"); 255219089Spjd while (ssread(drr, sizeof (dmu_replay_record_t), ofp) != 0) { 256219089Spjd 257219089Spjd switch (drr->drr_type) { 258219089Spjd case DRR_BEGIN: 259219089Spjd { 260219089Spjd int fflags; 261219089Spjd ZIO_SET_CHECKSUM(&stream_cksum, 0, 0, 0, 0); 262219089Spjd 263219089Spjd /* set the DEDUP feature flag for this stream */ 264219089Spjd fflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 265219089Spjd fflags |= (DMU_BACKUP_FEATURE_DEDUP | 266219089Spjd DMU_BACKUP_FEATURE_DEDUPPROPS); 267219089Spjd DMU_SET_FEATUREFLAGS(drrb->drr_versioninfo, fflags); 268219089Spjd 269219089Spjd if (cksum_and_write(drr, sizeof (dmu_replay_record_t), 270219089Spjd &stream_cksum, outfd) == -1) 271219089Spjd goto out; 272219089Spjd if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 273219089Spjd DMU_COMPOUNDSTREAM && drr->drr_payloadlen != 0) { 274219089Spjd int sz = drr->drr_payloadlen; 275219089Spjd 276219089Spjd if (sz > 1<<20) { 277219089Spjd free(buf); 278219089Spjd buf = malloc(sz); 279219089Spjd } 280219089Spjd (void) ssread(buf, sz, ofp); 281219089Spjd if (ferror(stdin)) 282219089Spjd perror("fread"); 283219089Spjd if (cksum_and_write(buf, sz, &stream_cksum, 284219089Spjd outfd) == -1) 285219089Spjd goto out; 286219089Spjd } 287219089Spjd break; 288219089Spjd } 289219089Spjd 290219089Spjd case DRR_END: 291219089Spjd { 292219089Spjd /* use the recalculated checksum */ 293219089Spjd ZIO_SET_CHECKSUM(&drre->drr_checksum, 294219089Spjd stream_cksum.zc_word[0], stream_cksum.zc_word[1], 295219089Spjd stream_cksum.zc_word[2], stream_cksum.zc_word[3]); 296219089Spjd if ((write(outfd, drr, 297219089Spjd sizeof (dmu_replay_record_t))) == -1) 298219089Spjd goto out; 299219089Spjd break; 300219089Spjd } 301219089Spjd 302219089Spjd case DRR_OBJECT: 303219089Spjd { 304219089Spjd if (cksum_and_write(drr, sizeof (dmu_replay_record_t), 305219089Spjd &stream_cksum, outfd) == -1) 306219089Spjd goto out; 307219089Spjd if (drro->drr_bonuslen > 0) { 308219089Spjd (void) ssread(buf, 309219089Spjd P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8), 310219089Spjd ofp); 311219089Spjd if (cksum_and_write(buf, 312219089Spjd P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8), 313219089Spjd &stream_cksum, outfd) == -1) 314219089Spjd goto out; 315219089Spjd } 316219089Spjd break; 317219089Spjd } 318219089Spjd 319219089Spjd case DRR_SPILL: 320219089Spjd { 321219089Spjd if (cksum_and_write(drr, sizeof (dmu_replay_record_t), 322219089Spjd &stream_cksum, outfd) == -1) 323219089Spjd goto out; 324219089Spjd (void) ssread(buf, drrs->drr_length, ofp); 325219089Spjd if (cksum_and_write(buf, drrs->drr_length, 326219089Spjd &stream_cksum, outfd) == -1) 327219089Spjd goto out; 328219089Spjd break; 329219089Spjd } 330219089Spjd 331219089Spjd case DRR_FREEOBJECTS: 332219089Spjd { 333219089Spjd if (cksum_and_write(drr, sizeof (dmu_replay_record_t), 334219089Spjd &stream_cksum, outfd) == -1) 335219089Spjd goto out; 336219089Spjd break; 337219089Spjd } 338219089Spjd 339219089Spjd case DRR_WRITE: 340219089Spjd { 341219089Spjd dataref_t dataref; 342219089Spjd 343219089Spjd (void) ssread(buf, drrw->drr_length, ofp); 344219089Spjd 345219089Spjd /* 346219089Spjd * Use the existing checksum if it's dedup-capable, 347219089Spjd * else calculate a SHA256 checksum for it. 348219089Spjd */ 349219089Spjd 350219089Spjd if (ZIO_CHECKSUM_EQUAL(drrw->drr_key.ddk_cksum, 351219089Spjd zero_cksum) || 352219089Spjd !DRR_IS_DEDUP_CAPABLE(drrw->drr_checksumflags)) { 353219089Spjd SHA256_CTX ctx; 354219089Spjd zio_cksum_t tmpsha256; 355219089Spjd 356219089Spjd SHA256Init(&ctx); 357219089Spjd SHA256Update(&ctx, buf, drrw->drr_length); 358219089Spjd SHA256Final(&tmpsha256, &ctx); 359219089Spjd drrw->drr_key.ddk_cksum.zc_word[0] = 360219089Spjd BE_64(tmpsha256.zc_word[0]); 361219089Spjd drrw->drr_key.ddk_cksum.zc_word[1] = 362219089Spjd BE_64(tmpsha256.zc_word[1]); 363219089Spjd drrw->drr_key.ddk_cksum.zc_word[2] = 364219089Spjd BE_64(tmpsha256.zc_word[2]); 365219089Spjd drrw->drr_key.ddk_cksum.zc_word[3] = 366219089Spjd BE_64(tmpsha256.zc_word[3]); 367219089Spjd drrw->drr_checksumtype = ZIO_CHECKSUM_SHA256; 368219089Spjd drrw->drr_checksumflags = DRR_CHECKSUM_DEDUP; 369219089Spjd } 370219089Spjd 371219089Spjd dataref.ref_guid = drrw->drr_toguid; 372219089Spjd dataref.ref_object = drrw->drr_object; 373219089Spjd dataref.ref_offset = drrw->drr_offset; 374219089Spjd 375219089Spjd if (ddt_update(dda->dedup_hdl, &ddt, 376219089Spjd &drrw->drr_key.ddk_cksum, drrw->drr_key.ddk_prop, 377219089Spjd &dataref)) { 378219089Spjd /* block already present in stream */ 379219089Spjd wbr_drrr->drr_object = drrw->drr_object; 380219089Spjd wbr_drrr->drr_offset = drrw->drr_offset; 381219089Spjd wbr_drrr->drr_length = drrw->drr_length; 382219089Spjd wbr_drrr->drr_toguid = drrw->drr_toguid; 383219089Spjd wbr_drrr->drr_refguid = dataref.ref_guid; 384219089Spjd wbr_drrr->drr_refobject = 385219089Spjd dataref.ref_object; 386219089Spjd wbr_drrr->drr_refoffset = 387219089Spjd dataref.ref_offset; 388219089Spjd 389219089Spjd wbr_drrr->drr_checksumtype = 390219089Spjd drrw->drr_checksumtype; 391219089Spjd wbr_drrr->drr_checksumflags = 392219089Spjd drrw->drr_checksumtype; 393219089Spjd wbr_drrr->drr_key.ddk_cksum = 394219089Spjd drrw->drr_key.ddk_cksum; 395219089Spjd wbr_drrr->drr_key.ddk_prop = 396219089Spjd drrw->drr_key.ddk_prop; 397219089Spjd 398219089Spjd if (cksum_and_write(&wbr_drr, 399219089Spjd sizeof (dmu_replay_record_t), &stream_cksum, 400219089Spjd outfd) == -1) 401219089Spjd goto out; 402219089Spjd } else { 403219089Spjd /* block not previously seen */ 404219089Spjd if (cksum_and_write(drr, 405219089Spjd sizeof (dmu_replay_record_t), &stream_cksum, 406219089Spjd outfd) == -1) 407219089Spjd goto out; 408219089Spjd if (cksum_and_write(buf, 409219089Spjd drrw->drr_length, 410219089Spjd &stream_cksum, outfd) == -1) 411219089Spjd goto out; 412219089Spjd } 413219089Spjd break; 414219089Spjd } 415219089Spjd 416219089Spjd case DRR_FREE: 417219089Spjd { 418219089Spjd if (cksum_and_write(drr, sizeof (dmu_replay_record_t), 419219089Spjd &stream_cksum, outfd) == -1) 420219089Spjd goto out; 421219089Spjd break; 422219089Spjd } 423219089Spjd 424219089Spjd default: 425219089Spjd (void) printf("INVALID record type 0x%x\n", 426219089Spjd drr->drr_type); 427219089Spjd /* should never happen, so assert */ 428219089Spjd assert(B_FALSE); 429219089Spjd } 430219089Spjd } 431219089Spjdout: 432219089Spjd umem_cache_destroy(ddt.ddecache); 433219089Spjd free(ddt.dedup_hash_array); 434219089Spjd free(buf); 435219089Spjd (void) fclose(ofp); 436219089Spjd 437219089Spjd return (NULL); 438219089Spjd} 439219089Spjd 440219089Spjd/* 441185029Spjd * Routines for dealing with the AVL tree of fs-nvlists 442185029Spjd */ 443185029Spjdtypedef struct fsavl_node { 444185029Spjd avl_node_t fn_node; 445185029Spjd nvlist_t *fn_nvfs; 446185029Spjd char *fn_snapname; 447185029Spjd uint64_t fn_guid; 448185029Spjd} fsavl_node_t; 449185029Spjd 450185029Spjdstatic int 451185029Spjdfsavl_compare(const void *arg1, const void *arg2) 452185029Spjd{ 453185029Spjd const fsavl_node_t *fn1 = arg1; 454185029Spjd const fsavl_node_t *fn2 = arg2; 455185029Spjd 456185029Spjd if (fn1->fn_guid > fn2->fn_guid) 457185029Spjd return (+1); 458185029Spjd else if (fn1->fn_guid < fn2->fn_guid) 459185029Spjd return (-1); 460185029Spjd else 461185029Spjd return (0); 462185029Spjd} 463185029Spjd 464185029Spjd/* 465185029Spjd * Given the GUID of a snapshot, find its containing filesystem and 466185029Spjd * (optionally) name. 467185029Spjd */ 468185029Spjdstatic nvlist_t * 469185029Spjdfsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname) 470185029Spjd{ 471185029Spjd fsavl_node_t fn_find; 472185029Spjd fsavl_node_t *fn; 473185029Spjd 474185029Spjd fn_find.fn_guid = snapguid; 475185029Spjd 476185029Spjd fn = avl_find(avl, &fn_find, NULL); 477185029Spjd if (fn) { 478185029Spjd if (snapname) 479185029Spjd *snapname = fn->fn_snapname; 480185029Spjd return (fn->fn_nvfs); 481185029Spjd } 482185029Spjd return (NULL); 483185029Spjd} 484185029Spjd 485185029Spjdstatic void 486185029Spjdfsavl_destroy(avl_tree_t *avl) 487185029Spjd{ 488185029Spjd fsavl_node_t *fn; 489185029Spjd void *cookie; 490185029Spjd 491185029Spjd if (avl == NULL) 492185029Spjd return; 493185029Spjd 494185029Spjd cookie = NULL; 495185029Spjd while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL) 496185029Spjd free(fn); 497185029Spjd avl_destroy(avl); 498185029Spjd free(avl); 499185029Spjd} 500185029Spjd 501219089Spjd/* 502219089Spjd * Given an nvlist, produce an avl tree of snapshots, ordered by guid 503219089Spjd */ 504185029Spjdstatic avl_tree_t * 505185029Spjdfsavl_create(nvlist_t *fss) 506185029Spjd{ 507185029Spjd avl_tree_t *fsavl; 508185029Spjd nvpair_t *fselem = NULL; 509185029Spjd 510185029Spjd if ((fsavl = malloc(sizeof (avl_tree_t))) == NULL) 511185029Spjd return (NULL); 512185029Spjd 513185029Spjd avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t), 514185029Spjd offsetof(fsavl_node_t, fn_node)); 515185029Spjd 516185029Spjd while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) { 517185029Spjd nvlist_t *nvfs, *snaps; 518185029Spjd nvpair_t *snapelem = NULL; 519185029Spjd 520185029Spjd VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); 521185029Spjd VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); 522185029Spjd 523185029Spjd while ((snapelem = 524185029Spjd nvlist_next_nvpair(snaps, snapelem)) != NULL) { 525185029Spjd fsavl_node_t *fn; 526185029Spjd uint64_t guid; 527185029Spjd 528185029Spjd VERIFY(0 == nvpair_value_uint64(snapelem, &guid)); 529185029Spjd if ((fn = malloc(sizeof (fsavl_node_t))) == NULL) { 530185029Spjd fsavl_destroy(fsavl); 531185029Spjd return (NULL); 532185029Spjd } 533185029Spjd fn->fn_nvfs = nvfs; 534185029Spjd fn->fn_snapname = nvpair_name(snapelem); 535185029Spjd fn->fn_guid = guid; 536185029Spjd 537185029Spjd /* 538185029Spjd * Note: if there are multiple snaps with the 539185029Spjd * same GUID, we ignore all but one. 540185029Spjd */ 541185029Spjd if (avl_find(fsavl, fn, NULL) == NULL) 542185029Spjd avl_add(fsavl, fn); 543185029Spjd else 544185029Spjd free(fn); 545185029Spjd } 546185029Spjd } 547185029Spjd 548185029Spjd return (fsavl); 549185029Spjd} 550185029Spjd 551185029Spjd/* 552185029Spjd * Routines for dealing with the giant nvlist of fs-nvlists, etc. 553185029Spjd */ 554185029Spjdtypedef struct send_data { 555185029Spjd uint64_t parent_fromsnap_guid; 556185029Spjd nvlist_t *parent_snaps; 557185029Spjd nvlist_t *fss; 558185029Spjd nvlist_t *snapprops; 559185029Spjd const char *fromsnap; 560185029Spjd const char *tosnap; 561219089Spjd boolean_t recursive; 562185029Spjd 563185029Spjd /* 564185029Spjd * The header nvlist is of the following format: 565185029Spjd * { 566185029Spjd * "tosnap" -> string 567185029Spjd * "fromsnap" -> string (if incremental) 568185029Spjd * "fss" -> { 569185029Spjd * id -> { 570185029Spjd * 571185029Spjd * "name" -> string (full name; for debugging) 572185029Spjd * "parentfromsnap" -> number (guid of fromsnap in parent) 573185029Spjd * 574185029Spjd * "props" -> { name -> value (only if set here) } 575185029Spjd * "snaps" -> { name (lastname) -> number (guid) } 576185029Spjd * "snapprops" -> { name (lastname) -> { name -> value } } 577185029Spjd * 578185029Spjd * "origin" -> number (guid) (if clone) 579185029Spjd * "sent" -> boolean (not on-disk) 580185029Spjd * } 581185029Spjd * } 582185029Spjd * } 583185029Spjd * 584185029Spjd */ 585185029Spjd} send_data_t; 586185029Spjd 587185029Spjdstatic void send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv); 588185029Spjd 589185029Spjdstatic int 590185029Spjdsend_iterate_snap(zfs_handle_t *zhp, void *arg) 591185029Spjd{ 592185029Spjd send_data_t *sd = arg; 593185029Spjd uint64_t guid = zhp->zfs_dmustats.dds_guid; 594185029Spjd char *snapname; 595185029Spjd nvlist_t *nv; 596185029Spjd 597185029Spjd snapname = strrchr(zhp->zfs_name, '@')+1; 598185029Spjd 599185029Spjd VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid)); 600185029Spjd /* 601185029Spjd * NB: if there is no fromsnap here (it's a newly created fs in 602185029Spjd * an incremental replication), we will substitute the tosnap. 603185029Spjd */ 604185029Spjd if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) || 605185029Spjd (sd->parent_fromsnap_guid == 0 && sd->tosnap && 606185029Spjd strcmp(snapname, sd->tosnap) == 0)) { 607185029Spjd sd->parent_fromsnap_guid = guid; 608185029Spjd } 609185029Spjd 610185029Spjd VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); 611185029Spjd send_iterate_prop(zhp, nv); 612185029Spjd VERIFY(0 == nvlist_add_nvlist(sd->snapprops, snapname, nv)); 613185029Spjd nvlist_free(nv); 614185029Spjd 615185029Spjd zfs_close(zhp); 616185029Spjd return (0); 617185029Spjd} 618185029Spjd 619185029Spjdstatic void 620185029Spjdsend_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv) 621185029Spjd{ 622185029Spjd nvpair_t *elem = NULL; 623185029Spjd 624185029Spjd while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) { 625185029Spjd char *propname = nvpair_name(elem); 626185029Spjd zfs_prop_t prop = zfs_name_to_prop(propname); 627185029Spjd nvlist_t *propnv; 628185029Spjd 629219089Spjd if (!zfs_prop_user(propname)) { 630219089Spjd /* 631219089Spjd * Realistically, this should never happen. However, 632219089Spjd * we want the ability to add DSL properties without 633219089Spjd * needing to make incompatible version changes. We 634219089Spjd * need to ignore unknown properties to allow older 635219089Spjd * software to still send datasets containing these 636219089Spjd * properties, with the unknown properties elided. 637219089Spjd */ 638219089Spjd if (prop == ZPROP_INVAL) 639219089Spjd continue; 640209962Smm 641219089Spjd if (zfs_prop_readonly(prop)) 642219089Spjd continue; 643219089Spjd } 644185029Spjd 645185029Spjd verify(nvpair_value_nvlist(elem, &propnv) == 0); 646219089Spjd if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION || 647219089Spjd prop == ZFS_PROP_REFQUOTA || 648219089Spjd prop == ZFS_PROP_REFRESERVATION) { 649219089Spjd char *source; 650185029Spjd uint64_t value; 651185029Spjd verify(nvlist_lookup_uint64(propnv, 652185029Spjd ZPROP_VALUE, &value) == 0); 653185029Spjd if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) 654185029Spjd continue; 655219089Spjd /* 656219089Spjd * May have no source before SPA_VERSION_RECVD_PROPS, 657219089Spjd * but is still modifiable. 658219089Spjd */ 659219089Spjd if (nvlist_lookup_string(propnv, 660219089Spjd ZPROP_SOURCE, &source) == 0) { 661219089Spjd if ((strcmp(source, zhp->zfs_name) != 0) && 662219089Spjd (strcmp(source, 663219089Spjd ZPROP_SOURCE_VAL_RECVD) != 0)) 664219089Spjd continue; 665219089Spjd } 666185029Spjd } else { 667185029Spjd char *source; 668185029Spjd if (nvlist_lookup_string(propnv, 669185029Spjd ZPROP_SOURCE, &source) != 0) 670185029Spjd continue; 671219089Spjd if ((strcmp(source, zhp->zfs_name) != 0) && 672219089Spjd (strcmp(source, ZPROP_SOURCE_VAL_RECVD) != 0)) 673185029Spjd continue; 674185029Spjd } 675185029Spjd 676185029Spjd if (zfs_prop_user(propname) || 677185029Spjd zfs_prop_get_type(prop) == PROP_TYPE_STRING) { 678185029Spjd char *value; 679185029Spjd verify(nvlist_lookup_string(propnv, 680185029Spjd ZPROP_VALUE, &value) == 0); 681185029Spjd VERIFY(0 == nvlist_add_string(nv, propname, value)); 682185029Spjd } else { 683185029Spjd uint64_t value; 684185029Spjd verify(nvlist_lookup_uint64(propnv, 685185029Spjd ZPROP_VALUE, &value) == 0); 686185029Spjd VERIFY(0 == nvlist_add_uint64(nv, propname, value)); 687185029Spjd } 688185029Spjd } 689185029Spjd} 690185029Spjd 691219089Spjd/* 692219089Spjd * recursively generate nvlists describing datasets. See comment 693219089Spjd * for the data structure send_data_t above for description of contents 694219089Spjd * of the nvlist. 695219089Spjd */ 696185029Spjdstatic int 697185029Spjdsend_iterate_fs(zfs_handle_t *zhp, void *arg) 698185029Spjd{ 699185029Spjd send_data_t *sd = arg; 700185029Spjd nvlist_t *nvfs, *nv; 701219089Spjd int rv = 0; 702185029Spjd uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid; 703185029Spjd uint64_t guid = zhp->zfs_dmustats.dds_guid; 704185029Spjd char guidstring[64]; 705185029Spjd 706185029Spjd VERIFY(0 == nvlist_alloc(&nvfs, NV_UNIQUE_NAME, 0)); 707185029Spjd VERIFY(0 == nvlist_add_string(nvfs, "name", zhp->zfs_name)); 708185029Spjd VERIFY(0 == nvlist_add_uint64(nvfs, "parentfromsnap", 709185029Spjd sd->parent_fromsnap_guid)); 710185029Spjd 711185029Spjd if (zhp->zfs_dmustats.dds_origin[0]) { 712185029Spjd zfs_handle_t *origin = zfs_open(zhp->zfs_hdl, 713185029Spjd zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT); 714185029Spjd if (origin == NULL) 715185029Spjd return (-1); 716185029Spjd VERIFY(0 == nvlist_add_uint64(nvfs, "origin", 717185029Spjd origin->zfs_dmustats.dds_guid)); 718185029Spjd } 719185029Spjd 720185029Spjd /* iterate over props */ 721185029Spjd VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); 722185029Spjd send_iterate_prop(zhp, nv); 723185029Spjd VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv)); 724185029Spjd nvlist_free(nv); 725185029Spjd 726185029Spjd /* iterate over snaps, and set sd->parent_fromsnap_guid */ 727185029Spjd sd->parent_fromsnap_guid = 0; 728185029Spjd VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0)); 729185029Spjd VERIFY(0 == nvlist_alloc(&sd->snapprops, NV_UNIQUE_NAME, 0)); 730230438Spjd (void) zfs_iter_snapshots(zhp, B_FALSE, send_iterate_snap, sd); 731185029Spjd VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps)); 732185029Spjd VERIFY(0 == nvlist_add_nvlist(nvfs, "snapprops", sd->snapprops)); 733185029Spjd nvlist_free(sd->parent_snaps); 734185029Spjd nvlist_free(sd->snapprops); 735185029Spjd 736185029Spjd /* add this fs to nvlist */ 737185029Spjd (void) snprintf(guidstring, sizeof (guidstring), 738185029Spjd "0x%llx", (longlong_t)guid); 739185029Spjd VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs)); 740185029Spjd nvlist_free(nvfs); 741185029Spjd 742185029Spjd /* iterate over children */ 743219089Spjd if (sd->recursive) 744219089Spjd rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd); 745185029Spjd 746185029Spjd sd->parent_fromsnap_guid = parent_fromsnap_guid_save; 747185029Spjd 748185029Spjd zfs_close(zhp); 749185029Spjd return (rv); 750185029Spjd} 751185029Spjd 752185029Spjdstatic int 753185029Spjdgather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap, 754219089Spjd const char *tosnap, boolean_t recursive, nvlist_t **nvlp, avl_tree_t **avlp) 755185029Spjd{ 756185029Spjd zfs_handle_t *zhp; 757185029Spjd send_data_t sd = { 0 }; 758185029Spjd int error; 759185029Spjd 760185029Spjd zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); 761185029Spjd if (zhp == NULL) 762185029Spjd return (EZFS_BADTYPE); 763185029Spjd 764185029Spjd VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0)); 765185029Spjd sd.fromsnap = fromsnap; 766185029Spjd sd.tosnap = tosnap; 767219089Spjd sd.recursive = recursive; 768185029Spjd 769185029Spjd if ((error = send_iterate_fs(zhp, &sd)) != 0) { 770185029Spjd nvlist_free(sd.fss); 771185029Spjd if (avlp != NULL) 772185029Spjd *avlp = NULL; 773185029Spjd *nvlp = NULL; 774185029Spjd return (error); 775185029Spjd } 776185029Spjd 777185029Spjd if (avlp != NULL && (*avlp = fsavl_create(sd.fss)) == NULL) { 778185029Spjd nvlist_free(sd.fss); 779185029Spjd *nvlp = NULL; 780185029Spjd return (EZFS_NOMEM); 781185029Spjd } 782185029Spjd 783185029Spjd *nvlp = sd.fss; 784185029Spjd return (0); 785185029Spjd} 786185029Spjd 787185029Spjd/* 788185029Spjd * Routines specific to "zfs send" 789185029Spjd */ 790185029Spjdtypedef struct send_dump_data { 791185029Spjd /* these are all just the short snapname (the part after the @) */ 792185029Spjd const char *fromsnap; 793185029Spjd const char *tosnap; 794219089Spjd char prevsnap[ZFS_MAXNAMELEN]; 795219089Spjd uint64_t prevsnap_obj; 796185029Spjd boolean_t seenfrom, seento, replicate, doall, fromorigin; 797235222Smm boolean_t verbose, dryrun, parsable, progress; 798185029Spjd int outfd; 799185029Spjd boolean_t err; 800185029Spjd nvlist_t *fss; 801185029Spjd avl_tree_t *fsavl; 802219089Spjd snapfilter_cb_t *filter_cb; 803219089Spjd void *filter_cb_arg; 804219089Spjd nvlist_t *debugnv; 805219089Spjd char holdtag[ZFS_MAXNAMELEN]; 806219089Spjd int cleanup_fd; 807228103Smm uint64_t size; 808185029Spjd} send_dump_data_t; 809185029Spjd 810228103Smmstatic int 811228103Smmestimate_ioctl(zfs_handle_t *zhp, uint64_t fromsnap_obj, 812228103Smm boolean_t fromorigin, uint64_t *sizep) 813228103Smm{ 814228103Smm zfs_cmd_t zc = { 0 }; 815228103Smm libzfs_handle_t *hdl = zhp->zfs_hdl; 816228103Smm 817228103Smm assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 818228103Smm assert(fromsnap_obj == 0 || !fromorigin); 819228103Smm 820228103Smm (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 821228103Smm zc.zc_obj = fromorigin; 822228103Smm zc.zc_sendobj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID); 823228103Smm zc.zc_fromobj = fromsnap_obj; 824228103Smm zc.zc_guid = 1; /* estimate flag */ 825228103Smm 826228103Smm if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SEND, &zc) != 0) { 827228103Smm char errbuf[1024]; 828228103Smm (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 829228103Smm "warning: cannot estimate space for '%s'"), zhp->zfs_name); 830228103Smm 831228103Smm switch (errno) { 832228103Smm case EXDEV: 833228103Smm zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 834228103Smm "not an earlier snapshot from the same fs")); 835228103Smm return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 836228103Smm 837228103Smm case ENOENT: 838228103Smm if (zfs_dataset_exists(hdl, zc.zc_name, 839228103Smm ZFS_TYPE_SNAPSHOT)) { 840228103Smm zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 841228103Smm "incremental source (@%s) does not exist"), 842228103Smm zc.zc_value); 843228103Smm } 844228103Smm return (zfs_error(hdl, EZFS_NOENT, errbuf)); 845228103Smm 846228103Smm case EDQUOT: 847228103Smm case EFBIG: 848228103Smm case EIO: 849228103Smm case ENOLINK: 850228103Smm case ENOSPC: 851228103Smm case ENXIO: 852228103Smm case EPIPE: 853228103Smm case ERANGE: 854228103Smm case EFAULT: 855228103Smm case EROFS: 856228103Smm zfs_error_aux(hdl, strerror(errno)); 857228103Smm return (zfs_error(hdl, EZFS_BADBACKUP, errbuf)); 858228103Smm 859228103Smm default: 860228103Smm return (zfs_standard_error(hdl, errno, errbuf)); 861228103Smm } 862228103Smm } 863228103Smm 864228103Smm *sizep = zc.zc_objset_type; 865228103Smm 866228103Smm return (0); 867228103Smm} 868228103Smm 869185029Spjd/* 870185029Spjd * Dumps a backup of the given snapshot (incremental from fromsnap if it's not 871185029Spjd * NULL) to the file descriptor specified by outfd. 872185029Spjd */ 873185029Spjdstatic int 874219089Spjddump_ioctl(zfs_handle_t *zhp, const char *fromsnap, uint64_t fromsnap_obj, 875219089Spjd boolean_t fromorigin, int outfd, nvlist_t *debugnv) 876185029Spjd{ 877185029Spjd zfs_cmd_t zc = { 0 }; 878185029Spjd libzfs_handle_t *hdl = zhp->zfs_hdl; 879219089Spjd nvlist_t *thisdbg; 880185029Spjd 881185029Spjd assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 882219089Spjd assert(fromsnap_obj == 0 || !fromorigin); 883185029Spjd 884185029Spjd (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 885185029Spjd zc.zc_cookie = outfd; 886185029Spjd zc.zc_obj = fromorigin; 887219089Spjd zc.zc_sendobj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID); 888219089Spjd zc.zc_fromobj = fromsnap_obj; 889185029Spjd 890219089Spjd VERIFY(0 == nvlist_alloc(&thisdbg, NV_UNIQUE_NAME, 0)); 891219089Spjd if (fromsnap && fromsnap[0] != '\0') { 892219089Spjd VERIFY(0 == nvlist_add_string(thisdbg, 893219089Spjd "fromsnap", fromsnap)); 894219089Spjd } 895219089Spjd 896228103Smm if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SEND, &zc) != 0) { 897185029Spjd char errbuf[1024]; 898185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 899185029Spjd "warning: cannot send '%s'"), zhp->zfs_name); 900185029Spjd 901219089Spjd VERIFY(0 == nvlist_add_uint64(thisdbg, "error", errno)); 902219089Spjd if (debugnv) { 903219089Spjd VERIFY(0 == nvlist_add_nvlist(debugnv, 904219089Spjd zhp->zfs_name, thisdbg)); 905219089Spjd } 906219089Spjd nvlist_free(thisdbg); 907219089Spjd 908185029Spjd switch (errno) { 909185029Spjd case EXDEV: 910185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 911185029Spjd "not an earlier snapshot from the same fs")); 912185029Spjd return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 913185029Spjd 914185029Spjd case ENOENT: 915185029Spjd if (zfs_dataset_exists(hdl, zc.zc_name, 916185029Spjd ZFS_TYPE_SNAPSHOT)) { 917185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 918185029Spjd "incremental source (@%s) does not exist"), 919185029Spjd zc.zc_value); 920185029Spjd } 921185029Spjd return (zfs_error(hdl, EZFS_NOENT, errbuf)); 922185029Spjd 923185029Spjd case EDQUOT: 924185029Spjd case EFBIG: 925185029Spjd case EIO: 926185029Spjd case ENOLINK: 927185029Spjd case ENOSPC: 928228103Smm#ifdef sun 929228103Smm case ENOSTR: 930228103Smm#endif 931185029Spjd case ENXIO: 932185029Spjd case EPIPE: 933185029Spjd case ERANGE: 934185029Spjd case EFAULT: 935185029Spjd case EROFS: 936185029Spjd zfs_error_aux(hdl, strerror(errno)); 937185029Spjd return (zfs_error(hdl, EZFS_BADBACKUP, errbuf)); 938185029Spjd 939185029Spjd default: 940185029Spjd return (zfs_standard_error(hdl, errno, errbuf)); 941185029Spjd } 942185029Spjd } 943185029Spjd 944219089Spjd if (debugnv) 945219089Spjd VERIFY(0 == nvlist_add_nvlist(debugnv, zhp->zfs_name, thisdbg)); 946219089Spjd nvlist_free(thisdbg); 947219089Spjd 948185029Spjd return (0); 949185029Spjd} 950185029Spjd 951185029Spjdstatic int 952219089Spjdhold_for_send(zfs_handle_t *zhp, send_dump_data_t *sdd) 953219089Spjd{ 954219089Spjd zfs_handle_t *pzhp; 955219089Spjd int error = 0; 956219089Spjd char *thissnap; 957219089Spjd 958219089Spjd assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 959219089Spjd 960228103Smm if (sdd->dryrun) 961228103Smm return (0); 962228103Smm 963219089Spjd /* 964219089Spjd * zfs_send() only opens a cleanup_fd for sends that need it, 965219089Spjd * e.g. replication and doall. 966219089Spjd */ 967219089Spjd if (sdd->cleanup_fd == -1) 968219089Spjd return (0); 969219089Spjd 970219089Spjd thissnap = strchr(zhp->zfs_name, '@') + 1; 971219089Spjd *(thissnap - 1) = '\0'; 972219089Spjd pzhp = zfs_open(zhp->zfs_hdl, zhp->zfs_name, ZFS_TYPE_DATASET); 973219089Spjd *(thissnap - 1) = '@'; 974219089Spjd 975219089Spjd /* 976219089Spjd * It's OK if the parent no longer exists. The send code will 977219089Spjd * handle that error. 978219089Spjd */ 979219089Spjd if (pzhp) { 980219089Spjd error = zfs_hold(pzhp, thissnap, sdd->holdtag, 981219089Spjd B_FALSE, B_TRUE, B_TRUE, sdd->cleanup_fd, 982219089Spjd zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID), 983219089Spjd zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG)); 984219089Spjd zfs_close(pzhp); 985219089Spjd } 986219089Spjd 987219089Spjd return (error); 988219089Spjd} 989219089Spjd 990235222Smmstatic void * 991235222Smmsend_progress_thread(void *arg) 992235222Smm{ 993235222Smm progress_arg_t *pa = arg; 994235222Smm 995235222Smm zfs_cmd_t zc = { 0 }; 996235222Smm zfs_handle_t *zhp = pa->pa_zhp; 997235222Smm libzfs_handle_t *hdl = zhp->zfs_hdl; 998235222Smm unsigned long long bytes; 999235222Smm char buf[16]; 1000235222Smm 1001235222Smm time_t t; 1002235222Smm struct tm *tm; 1003235222Smm 1004235222Smm assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 1005235222Smm (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1006235222Smm 1007235222Smm if (!pa->pa_parsable) 1008235222Smm (void) fprintf(stderr, "TIME SENT SNAPSHOT\n"); 1009235222Smm 1010235222Smm /* 1011235222Smm * Print the progress from ZFS_IOC_SEND_PROGRESS every second. 1012235222Smm */ 1013235222Smm for (;;) { 1014235222Smm (void) sleep(1); 1015235222Smm 1016235222Smm zc.zc_cookie = pa->pa_fd; 1017235222Smm if (zfs_ioctl(hdl, ZFS_IOC_SEND_PROGRESS, &zc) != 0) 1018235222Smm return ((void *)-1); 1019235222Smm 1020235222Smm (void) time(&t); 1021235222Smm tm = localtime(&t); 1022235222Smm bytes = zc.zc_cookie; 1023235222Smm 1024235222Smm if (pa->pa_parsable) { 1025235222Smm (void) fprintf(stderr, "%02d:%02d:%02d\t%llu\t%s\n", 1026235222Smm tm->tm_hour, tm->tm_min, tm->tm_sec, 1027235222Smm bytes, zhp->zfs_name); 1028235222Smm } else { 1029235222Smm zfs_nicenum(bytes, buf, sizeof (buf)); 1030235222Smm (void) fprintf(stderr, "%02d:%02d:%02d %5s %s\n", 1031235222Smm tm->tm_hour, tm->tm_min, tm->tm_sec, 1032235222Smm buf, zhp->zfs_name); 1033235222Smm } 1034235222Smm } 1035235222Smm} 1036235222Smm 1037219089Spjdstatic int 1038185029Spjddump_snapshot(zfs_handle_t *zhp, void *arg) 1039185029Spjd{ 1040185029Spjd send_dump_data_t *sdd = arg; 1041235222Smm progress_arg_t pa = { 0 }; 1042235222Smm pthread_t tid; 1043235222Smm 1044219089Spjd char *thissnap; 1045185029Spjd int err; 1046228103Smm boolean_t isfromsnap, istosnap, fromorigin; 1047219089Spjd boolean_t exclude = B_FALSE; 1048185029Spjd 1049185029Spjd thissnap = strchr(zhp->zfs_name, '@') + 1; 1050219089Spjd isfromsnap = (sdd->fromsnap != NULL && 1051219089Spjd strcmp(sdd->fromsnap, thissnap) == 0); 1052185029Spjd 1053219089Spjd if (!sdd->seenfrom && isfromsnap) { 1054219089Spjd err = hold_for_send(zhp, sdd); 1055219089Spjd if (err == 0) { 1056219089Spjd sdd->seenfrom = B_TRUE; 1057219089Spjd (void) strcpy(sdd->prevsnap, thissnap); 1058219089Spjd sdd->prevsnap_obj = zfs_prop_get_int(zhp, 1059219089Spjd ZFS_PROP_OBJSETID); 1060219089Spjd } else if (err == ENOENT) { 1061219089Spjd err = 0; 1062219089Spjd } 1063185029Spjd zfs_close(zhp); 1064219089Spjd return (err); 1065185029Spjd } 1066185029Spjd 1067185029Spjd if (sdd->seento || !sdd->seenfrom) { 1068185029Spjd zfs_close(zhp); 1069185029Spjd return (0); 1070185029Spjd } 1071185029Spjd 1072219089Spjd istosnap = (strcmp(sdd->tosnap, thissnap) == 0); 1073219089Spjd if (istosnap) 1074219089Spjd sdd->seento = B_TRUE; 1075219089Spjd 1076219089Spjd if (!sdd->doall && !isfromsnap && !istosnap) { 1077219089Spjd if (sdd->replicate) { 1078219089Spjd char *snapname; 1079219089Spjd nvlist_t *snapprops; 1080219089Spjd /* 1081219089Spjd * Filter out all intermediate snapshots except origin 1082219089Spjd * snapshots needed to replicate clones. 1083219089Spjd */ 1084219089Spjd nvlist_t *nvfs = fsavl_find(sdd->fsavl, 1085219089Spjd zhp->zfs_dmustats.dds_guid, &snapname); 1086219089Spjd 1087219089Spjd VERIFY(0 == nvlist_lookup_nvlist(nvfs, 1088219089Spjd "snapprops", &snapprops)); 1089219089Spjd VERIFY(0 == nvlist_lookup_nvlist(snapprops, 1090219089Spjd thissnap, &snapprops)); 1091219089Spjd exclude = !nvlist_exists(snapprops, "is_clone_origin"); 1092219089Spjd } else { 1093219089Spjd exclude = B_TRUE; 1094219089Spjd } 1095219089Spjd } 1096219089Spjd 1097219089Spjd /* 1098219089Spjd * If a filter function exists, call it to determine whether 1099219089Spjd * this snapshot will be sent. 1100219089Spjd */ 1101219089Spjd if (exclude || (sdd->filter_cb != NULL && 1102219089Spjd sdd->filter_cb(zhp, sdd->filter_cb_arg) == B_FALSE)) { 1103219089Spjd /* 1104219089Spjd * This snapshot is filtered out. Don't send it, and don't 1105219089Spjd * set prevsnap_obj, so it will be as if this snapshot didn't 1106219089Spjd * exist, and the next accepted snapshot will be sent as 1107219089Spjd * an incremental from the last accepted one, or as the 1108219089Spjd * first (and full) snapshot in the case of a replication, 1109219089Spjd * non-incremental send. 1110219089Spjd */ 1111219089Spjd zfs_close(zhp); 1112219089Spjd return (0); 1113219089Spjd } 1114219089Spjd 1115219089Spjd err = hold_for_send(zhp, sdd); 1116219089Spjd if (err) { 1117219089Spjd if (err == ENOENT) 1118219089Spjd err = 0; 1119219089Spjd zfs_close(zhp); 1120219089Spjd return (err); 1121219089Spjd } 1122219089Spjd 1123228103Smm fromorigin = sdd->prevsnap[0] == '\0' && 1124228103Smm (sdd->fromorigin || sdd->replicate); 1125228103Smm 1126185029Spjd if (sdd->verbose) { 1127228103Smm uint64_t size; 1128228103Smm err = estimate_ioctl(zhp, sdd->prevsnap_obj, 1129228103Smm fromorigin, &size); 1130228103Smm 1131228103Smm if (sdd->parsable) { 1132228103Smm if (sdd->prevsnap[0] != '\0') { 1133228103Smm (void) fprintf(stderr, "incremental\t%s\t%s", 1134228103Smm sdd->prevsnap, zhp->zfs_name); 1135228103Smm } else { 1136228103Smm (void) fprintf(stderr, "full\t%s", 1137228103Smm zhp->zfs_name); 1138228103Smm } 1139228103Smm } else { 1140228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1141228103Smm "send from @%s to %s"), 1142228103Smm sdd->prevsnap, zhp->zfs_name); 1143228103Smm } 1144228103Smm if (err == 0) { 1145228103Smm if (sdd->parsable) { 1146228103Smm (void) fprintf(stderr, "\t%llu\n", 1147228103Smm (longlong_t)size); 1148228103Smm } else { 1149228103Smm char buf[16]; 1150228103Smm zfs_nicenum(size, buf, sizeof (buf)); 1151228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1152228103Smm " estimated size is %s\n"), buf); 1153228103Smm } 1154228103Smm sdd->size += size; 1155228103Smm } else { 1156228103Smm (void) fprintf(stderr, "\n"); 1157228103Smm } 1158185029Spjd } 1159185029Spjd 1160228103Smm if (!sdd->dryrun) { 1161235222Smm /* 1162235222Smm * If progress reporting is requested, spawn a new thread to 1163235222Smm * poll ZFS_IOC_SEND_PROGRESS at a regular interval. 1164235222Smm */ 1165235222Smm if (sdd->progress) { 1166235222Smm pa.pa_zhp = zhp; 1167235222Smm pa.pa_fd = sdd->outfd; 1168235222Smm pa.pa_parsable = sdd->parsable; 1169235222Smm 1170235222Smm if (err = pthread_create(&tid, NULL, 1171235222Smm send_progress_thread, &pa)) { 1172235222Smm zfs_close(zhp); 1173235222Smm return (err); 1174235222Smm } 1175235222Smm } 1176235222Smm 1177228103Smm err = dump_ioctl(zhp, sdd->prevsnap, sdd->prevsnap_obj, 1178228103Smm fromorigin, sdd->outfd, sdd->debugnv); 1179235222Smm 1180235222Smm if (sdd->progress) { 1181235222Smm (void) pthread_cancel(tid); 1182235222Smm (void) pthread_join(tid, NULL); 1183235222Smm } 1184228103Smm } 1185185029Spjd 1186219089Spjd (void) strcpy(sdd->prevsnap, thissnap); 1187219089Spjd sdd->prevsnap_obj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID); 1188185029Spjd zfs_close(zhp); 1189185029Spjd return (err); 1190185029Spjd} 1191185029Spjd 1192185029Spjdstatic int 1193185029Spjddump_filesystem(zfs_handle_t *zhp, void *arg) 1194185029Spjd{ 1195185029Spjd int rv = 0; 1196185029Spjd send_dump_data_t *sdd = arg; 1197185029Spjd boolean_t missingfrom = B_FALSE; 1198185029Spjd zfs_cmd_t zc = { 0 }; 1199185029Spjd 1200185029Spjd (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", 1201185029Spjd zhp->zfs_name, sdd->tosnap); 1202185029Spjd if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) { 1203228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1204228103Smm "WARNING: could not send %s@%s: does not exist\n"), 1205185029Spjd zhp->zfs_name, sdd->tosnap); 1206185029Spjd sdd->err = B_TRUE; 1207185029Spjd return (0); 1208185029Spjd } 1209185029Spjd 1210185029Spjd if (sdd->replicate && sdd->fromsnap) { 1211185029Spjd /* 1212185029Spjd * If this fs does not have fromsnap, and we're doing 1213185029Spjd * recursive, we need to send a full stream from the 1214185029Spjd * beginning (or an incremental from the origin if this 1215185029Spjd * is a clone). If we're doing non-recursive, then let 1216185029Spjd * them get the error. 1217185029Spjd */ 1218185029Spjd (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", 1219185029Spjd zhp->zfs_name, sdd->fromsnap); 1220185029Spjd if (ioctl(zhp->zfs_hdl->libzfs_fd, 1221185029Spjd ZFS_IOC_OBJSET_STATS, &zc) != 0) { 1222185029Spjd missingfrom = B_TRUE; 1223185029Spjd } 1224185029Spjd } 1225185029Spjd 1226219089Spjd sdd->seenfrom = sdd->seento = sdd->prevsnap[0] = 0; 1227219089Spjd sdd->prevsnap_obj = 0; 1228219089Spjd if (sdd->fromsnap == NULL || missingfrom) 1229219089Spjd sdd->seenfrom = B_TRUE; 1230185029Spjd 1231219089Spjd rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg); 1232219089Spjd if (!sdd->seenfrom) { 1233228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1234219089Spjd "WARNING: could not send %s@%s:\n" 1235228103Smm "incremental source (%s@%s) does not exist\n"), 1236219089Spjd zhp->zfs_name, sdd->tosnap, 1237219089Spjd zhp->zfs_name, sdd->fromsnap); 1238219089Spjd sdd->err = B_TRUE; 1239219089Spjd } else if (!sdd->seento) { 1240219089Spjd if (sdd->fromsnap) { 1241228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1242185029Spjd "WARNING: could not send %s@%s:\n" 1243219089Spjd "incremental source (%s@%s) " 1244228103Smm "is not earlier than it\n"), 1245185029Spjd zhp->zfs_name, sdd->tosnap, 1246185029Spjd zhp->zfs_name, sdd->fromsnap); 1247185029Spjd } else { 1248228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1249228103Smm "WARNING: " 1250228103Smm "could not send %s@%s: does not exist\n"), 1251219089Spjd zhp->zfs_name, sdd->tosnap); 1252185029Spjd } 1253219089Spjd sdd->err = B_TRUE; 1254185029Spjd } 1255185029Spjd 1256185029Spjd return (rv); 1257185029Spjd} 1258185029Spjd 1259185029Spjdstatic int 1260185029Spjddump_filesystems(zfs_handle_t *rzhp, void *arg) 1261185029Spjd{ 1262185029Spjd send_dump_data_t *sdd = arg; 1263185029Spjd nvpair_t *fspair; 1264185029Spjd boolean_t needagain, progress; 1265185029Spjd 1266185029Spjd if (!sdd->replicate) 1267185029Spjd return (dump_filesystem(rzhp, sdd)); 1268185029Spjd 1269219089Spjd /* Mark the clone origin snapshots. */ 1270219089Spjd for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; 1271219089Spjd fspair = nvlist_next_nvpair(sdd->fss, fspair)) { 1272219089Spjd nvlist_t *nvfs; 1273219089Spjd uint64_t origin_guid = 0; 1274219089Spjd 1275219089Spjd VERIFY(0 == nvpair_value_nvlist(fspair, &nvfs)); 1276219089Spjd (void) nvlist_lookup_uint64(nvfs, "origin", &origin_guid); 1277219089Spjd if (origin_guid != 0) { 1278219089Spjd char *snapname; 1279219089Spjd nvlist_t *origin_nv = fsavl_find(sdd->fsavl, 1280219089Spjd origin_guid, &snapname); 1281219089Spjd if (origin_nv != NULL) { 1282219089Spjd nvlist_t *snapprops; 1283219089Spjd VERIFY(0 == nvlist_lookup_nvlist(origin_nv, 1284219089Spjd "snapprops", &snapprops)); 1285219089Spjd VERIFY(0 == nvlist_lookup_nvlist(snapprops, 1286219089Spjd snapname, &snapprops)); 1287219089Spjd VERIFY(0 == nvlist_add_boolean( 1288219089Spjd snapprops, "is_clone_origin")); 1289219089Spjd } 1290219089Spjd } 1291219089Spjd } 1292185029Spjdagain: 1293185029Spjd needagain = progress = B_FALSE; 1294185029Spjd for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; 1295185029Spjd fspair = nvlist_next_nvpair(sdd->fss, fspair)) { 1296228103Smm nvlist_t *fslist, *parent_nv; 1297185029Spjd char *fsname; 1298185029Spjd zfs_handle_t *zhp; 1299185029Spjd int err; 1300185029Spjd uint64_t origin_guid = 0; 1301228103Smm uint64_t parent_guid = 0; 1302185029Spjd 1303185029Spjd VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0); 1304185029Spjd if (nvlist_lookup_boolean(fslist, "sent") == 0) 1305185029Spjd continue; 1306185029Spjd 1307185029Spjd VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0); 1308185029Spjd (void) nvlist_lookup_uint64(fslist, "origin", &origin_guid); 1309228103Smm (void) nvlist_lookup_uint64(fslist, "parentfromsnap", 1310228103Smm &parent_guid); 1311185029Spjd 1312228103Smm if (parent_guid != 0) { 1313228103Smm parent_nv = fsavl_find(sdd->fsavl, parent_guid, NULL); 1314228103Smm if (!nvlist_exists(parent_nv, "sent")) { 1315228103Smm /* parent has not been sent; skip this one */ 1316228103Smm needagain = B_TRUE; 1317228103Smm continue; 1318228103Smm } 1319228103Smm } 1320228103Smm 1321219089Spjd if (origin_guid != 0) { 1322219089Spjd nvlist_t *origin_nv = fsavl_find(sdd->fsavl, 1323219089Spjd origin_guid, NULL); 1324219089Spjd if (origin_nv != NULL && 1325228103Smm !nvlist_exists(origin_nv, "sent")) { 1326219089Spjd /* 1327219089Spjd * origin has not been sent yet; 1328219089Spjd * skip this clone. 1329219089Spjd */ 1330219089Spjd needagain = B_TRUE; 1331219089Spjd continue; 1332219089Spjd } 1333185029Spjd } 1334185029Spjd 1335185029Spjd zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET); 1336185029Spjd if (zhp == NULL) 1337185029Spjd return (-1); 1338185029Spjd err = dump_filesystem(zhp, sdd); 1339185029Spjd VERIFY(nvlist_add_boolean(fslist, "sent") == 0); 1340185029Spjd progress = B_TRUE; 1341185029Spjd zfs_close(zhp); 1342185029Spjd if (err) 1343185029Spjd return (err); 1344185029Spjd } 1345185029Spjd if (needagain) { 1346185029Spjd assert(progress); 1347185029Spjd goto again; 1348185029Spjd } 1349228103Smm 1350228103Smm /* clean out the sent flags in case we reuse this fss */ 1351228103Smm for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; 1352228103Smm fspair = nvlist_next_nvpair(sdd->fss, fspair)) { 1353228103Smm nvlist_t *fslist; 1354228103Smm 1355228103Smm VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0); 1356228103Smm (void) nvlist_remove_all(fslist, "sent"); 1357228103Smm } 1358228103Smm 1359185029Spjd return (0); 1360185029Spjd} 1361185029Spjd 1362185029Spjd/* 1363219089Spjd * Generate a send stream for the dataset identified by the argument zhp. 1364219089Spjd * 1365219089Spjd * The content of the send stream is the snapshot identified by 1366219089Spjd * 'tosnap'. Incremental streams are requested in two ways: 1367219089Spjd * - from the snapshot identified by "fromsnap" (if non-null) or 1368219089Spjd * - from the origin of the dataset identified by zhp, which must 1369219089Spjd * be a clone. In this case, "fromsnap" is null and "fromorigin" 1370219089Spjd * is TRUE. 1371219089Spjd * 1372219089Spjd * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and 1373219089Spjd * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM) 1374219089Spjd * if "replicate" is set. If "doall" is set, dump all the intermediate 1375219089Spjd * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall" 1376219089Spjd * case too. If "props" is set, send properties. 1377185029Spjd */ 1378185029Spjdint 1379185029Spjdzfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap, 1380228103Smm sendflags_t *flags, int outfd, snapfilter_cb_t filter_func, 1381219089Spjd void *cb_arg, nvlist_t **debugnvp) 1382185029Spjd{ 1383185029Spjd char errbuf[1024]; 1384185029Spjd send_dump_data_t sdd = { 0 }; 1385228103Smm int err = 0; 1386185029Spjd nvlist_t *fss = NULL; 1387185029Spjd avl_tree_t *fsavl = NULL; 1388219089Spjd static uint64_t holdseq; 1389219089Spjd int spa_version; 1390219089Spjd pthread_t tid; 1391219089Spjd int pipefd[2]; 1392219089Spjd dedup_arg_t dda = { 0 }; 1393219089Spjd int featureflags = 0; 1394185029Spjd 1395185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1396185029Spjd "cannot send '%s'"), zhp->zfs_name); 1397185029Spjd 1398185029Spjd if (fromsnap && fromsnap[0] == '\0') { 1399185029Spjd zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 1400185029Spjd "zero-length incremental source")); 1401185029Spjd return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 1402185029Spjd } 1403185029Spjd 1404219089Spjd if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM) { 1405219089Spjd uint64_t version; 1406219089Spjd version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1407219089Spjd if (version >= ZPL_VERSION_SA) { 1408219089Spjd featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; 1409219089Spjd } 1410219089Spjd } 1411219089Spjd 1412228103Smm if (flags->dedup && !flags->dryrun) { 1413219089Spjd featureflags |= (DMU_BACKUP_FEATURE_DEDUP | 1414219089Spjd DMU_BACKUP_FEATURE_DEDUPPROPS); 1415219089Spjd if (err = pipe(pipefd)) { 1416219089Spjd zfs_error_aux(zhp->zfs_hdl, strerror(errno)); 1417219089Spjd return (zfs_error(zhp->zfs_hdl, EZFS_PIPEFAILED, 1418219089Spjd errbuf)); 1419219089Spjd } 1420219089Spjd dda.outputfd = outfd; 1421219089Spjd dda.inputfd = pipefd[1]; 1422219089Spjd dda.dedup_hdl = zhp->zfs_hdl; 1423219089Spjd if (err = pthread_create(&tid, NULL, cksummer, &dda)) { 1424219089Spjd (void) close(pipefd[0]); 1425219089Spjd (void) close(pipefd[1]); 1426219089Spjd zfs_error_aux(zhp->zfs_hdl, strerror(errno)); 1427219089Spjd return (zfs_error(zhp->zfs_hdl, 1428219089Spjd EZFS_THREADCREATEFAILED, errbuf)); 1429219089Spjd } 1430219089Spjd } 1431219089Spjd 1432228103Smm if (flags->replicate || flags->doall || flags->props) { 1433185029Spjd dmu_replay_record_t drr = { 0 }; 1434185029Spjd char *packbuf = NULL; 1435185029Spjd size_t buflen = 0; 1436185029Spjd zio_cksum_t zc = { 0 }; 1437185029Spjd 1438228103Smm if (flags->replicate || flags->props) { 1439185029Spjd nvlist_t *hdrnv; 1440185029Spjd 1441185029Spjd VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0)); 1442185029Spjd if (fromsnap) { 1443185029Spjd VERIFY(0 == nvlist_add_string(hdrnv, 1444185029Spjd "fromsnap", fromsnap)); 1445185029Spjd } 1446185029Spjd VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap)); 1447228103Smm if (!flags->replicate) { 1448219089Spjd VERIFY(0 == nvlist_add_boolean(hdrnv, 1449219089Spjd "not_recursive")); 1450219089Spjd } 1451185029Spjd 1452185029Spjd err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name, 1453228103Smm fromsnap, tosnap, flags->replicate, &fss, &fsavl); 1454185029Spjd if (err) 1455219089Spjd goto err_out; 1456185029Spjd VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss)); 1457185029Spjd err = nvlist_pack(hdrnv, &packbuf, &buflen, 1458185029Spjd NV_ENCODE_XDR, 0); 1459219089Spjd if (debugnvp) 1460219089Spjd *debugnvp = hdrnv; 1461219089Spjd else 1462219089Spjd nvlist_free(hdrnv); 1463185029Spjd if (err) { 1464185029Spjd fsavl_destroy(fsavl); 1465185029Spjd nvlist_free(fss); 1466219089Spjd goto stderr_out; 1467185029Spjd } 1468185029Spjd } 1469185029Spjd 1470228103Smm if (!flags->dryrun) { 1471228103Smm /* write first begin record */ 1472228103Smm drr.drr_type = DRR_BEGIN; 1473228103Smm drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; 1474228103Smm DMU_SET_STREAM_HDRTYPE(drr.drr_u.drr_begin. 1475228103Smm drr_versioninfo, DMU_COMPOUNDSTREAM); 1476228103Smm DMU_SET_FEATUREFLAGS(drr.drr_u.drr_begin. 1477228103Smm drr_versioninfo, featureflags); 1478228103Smm (void) snprintf(drr.drr_u.drr_begin.drr_toname, 1479228103Smm sizeof (drr.drr_u.drr_begin.drr_toname), 1480228103Smm "%s@%s", zhp->zfs_name, tosnap); 1481228103Smm drr.drr_payloadlen = buflen; 1482228103Smm err = cksum_and_write(&drr, sizeof (drr), &zc, outfd); 1483185029Spjd 1484228103Smm /* write header nvlist */ 1485228103Smm if (err != -1 && packbuf != NULL) { 1486228103Smm err = cksum_and_write(packbuf, buflen, &zc, 1487228103Smm outfd); 1488228103Smm } 1489228103Smm free(packbuf); 1490228103Smm if (err == -1) { 1491228103Smm fsavl_destroy(fsavl); 1492228103Smm nvlist_free(fss); 1493228103Smm err = errno; 1494228103Smm goto stderr_out; 1495228103Smm } 1496185029Spjd 1497228103Smm /* write end record */ 1498185029Spjd bzero(&drr, sizeof (drr)); 1499185029Spjd drr.drr_type = DRR_END; 1500185029Spjd drr.drr_u.drr_end.drr_checksum = zc; 1501185029Spjd err = write(outfd, &drr, sizeof (drr)); 1502185029Spjd if (err == -1) { 1503185029Spjd fsavl_destroy(fsavl); 1504185029Spjd nvlist_free(fss); 1505219089Spjd err = errno; 1506219089Spjd goto stderr_out; 1507185029Spjd } 1508228103Smm 1509228103Smm err = 0; 1510185029Spjd } 1511185029Spjd } 1512185029Spjd 1513185029Spjd /* dump each stream */ 1514185029Spjd sdd.fromsnap = fromsnap; 1515185029Spjd sdd.tosnap = tosnap; 1516228103Smm if (flags->dedup) 1517219089Spjd sdd.outfd = pipefd[0]; 1518219089Spjd else 1519219089Spjd sdd.outfd = outfd; 1520228103Smm sdd.replicate = flags->replicate; 1521228103Smm sdd.doall = flags->doall; 1522228103Smm sdd.fromorigin = flags->fromorigin; 1523185029Spjd sdd.fss = fss; 1524185029Spjd sdd.fsavl = fsavl; 1525228103Smm sdd.verbose = flags->verbose; 1526228103Smm sdd.parsable = flags->parsable; 1527235222Smm sdd.progress = flags->progress; 1528228103Smm sdd.dryrun = flags->dryrun; 1529219089Spjd sdd.filter_cb = filter_func; 1530219089Spjd sdd.filter_cb_arg = cb_arg; 1531219089Spjd if (debugnvp) 1532219089Spjd sdd.debugnv = *debugnvp; 1533238422Smm 1534238422Smm /* 1535238422Smm * Some flags require that we place user holds on the datasets that are 1536238422Smm * being sent so they don't get destroyed during the send. We can skip 1537238422Smm * this step if the pool is imported read-only since the datasets cannot 1538238422Smm * be destroyed. 1539238422Smm */ 1540238422Smm if (!flags->dryrun && !zpool_get_prop_int(zfs_get_pool_handle(zhp), 1541238422Smm ZPOOL_PROP_READONLY, NULL) && 1542238422Smm zfs_spa_version(zhp, &spa_version) == 0 && 1543238422Smm spa_version >= SPA_VERSION_USERREFS && 1544238422Smm (flags->doall || flags->replicate)) { 1545219089Spjd ++holdseq; 1546219089Spjd (void) snprintf(sdd.holdtag, sizeof (sdd.holdtag), 1547219089Spjd ".send-%d-%llu", getpid(), (u_longlong_t)holdseq); 1548219089Spjd sdd.cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL); 1549219089Spjd if (sdd.cleanup_fd < 0) { 1550219089Spjd err = errno; 1551219089Spjd goto stderr_out; 1552219089Spjd } 1553219089Spjd } else { 1554219089Spjd sdd.cleanup_fd = -1; 1555219089Spjd } 1556228103Smm if (flags->verbose) { 1557228103Smm /* 1558228103Smm * Do a verbose no-op dry run to get all the verbose output 1559228103Smm * before generating any data. Then do a non-verbose real 1560228103Smm * run to generate the streams. 1561228103Smm */ 1562228103Smm sdd.dryrun = B_TRUE; 1563228103Smm err = dump_filesystems(zhp, &sdd); 1564228103Smm sdd.dryrun = flags->dryrun; 1565228103Smm sdd.verbose = B_FALSE; 1566228103Smm if (flags->parsable) { 1567228103Smm (void) fprintf(stderr, "size\t%llu\n", 1568228103Smm (longlong_t)sdd.size); 1569228103Smm } else { 1570228103Smm char buf[16]; 1571228103Smm zfs_nicenum(sdd.size, buf, sizeof (buf)); 1572228103Smm (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 1573228103Smm "total estimated size is %s\n"), buf); 1574228103Smm } 1575228103Smm } 1576185029Spjd err = dump_filesystems(zhp, &sdd); 1577185029Spjd fsavl_destroy(fsavl); 1578185029Spjd nvlist_free(fss); 1579185029Spjd 1580228103Smm if (flags->dedup) { 1581219089Spjd (void) close(pipefd[0]); 1582219089Spjd (void) pthread_join(tid, NULL); 1583219089Spjd } 1584219089Spjd 1585219089Spjd if (sdd.cleanup_fd != -1) { 1586219089Spjd VERIFY(0 == close(sdd.cleanup_fd)); 1587219089Spjd sdd.cleanup_fd = -1; 1588219089Spjd } 1589219089Spjd 1590228103Smm if (!flags->dryrun && (flags->replicate || flags->doall || 1591228103Smm flags->props)) { 1592185029Spjd /* 1593185029Spjd * write final end record. NB: want to do this even if 1594185029Spjd * there was some error, because it might not be totally 1595185029Spjd * failed. 1596185029Spjd */ 1597185029Spjd dmu_replay_record_t drr = { 0 }; 1598185029Spjd drr.drr_type = DRR_END; 1599185029Spjd if (write(outfd, &drr, sizeof (drr)) == -1) { 1600185029Spjd return (zfs_standard_error(zhp->zfs_hdl, 1601185029Spjd errno, errbuf)); 1602185029Spjd } 1603185029Spjd } 1604185029Spjd 1605185029Spjd return (err || sdd.err); 1606219089Spjd 1607219089Spjdstderr_out: 1608219089Spjd err = zfs_standard_error(zhp->zfs_hdl, err, errbuf); 1609219089Spjderr_out: 1610219089Spjd if (sdd.cleanup_fd != -1) 1611219089Spjd VERIFY(0 == close(sdd.cleanup_fd)); 1612228103Smm if (flags->dedup) { 1613219089Spjd (void) pthread_cancel(tid); 1614219089Spjd (void) pthread_join(tid, NULL); 1615219089Spjd (void) close(pipefd[0]); 1616219089Spjd } 1617219089Spjd return (err); 1618185029Spjd} 1619185029Spjd 1620185029Spjd/* 1621185029Spjd * Routines specific to "zfs recv" 1622185029Spjd */ 1623185029Spjd 1624185029Spjdstatic int 1625185029Spjdrecv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen, 1626185029Spjd boolean_t byteswap, zio_cksum_t *zc) 1627185029Spjd{ 1628185029Spjd char *cp = buf; 1629185029Spjd int rv; 1630185029Spjd int len = ilen; 1631185029Spjd 1632185029Spjd do { 1633185029Spjd rv = read(fd, cp, len); 1634185029Spjd cp += rv; 1635185029Spjd len -= rv; 1636185029Spjd } while (rv > 0); 1637185029Spjd 1638185029Spjd if (rv < 0 || len != 0) { 1639185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1640185029Spjd "failed to read from stream")); 1641185029Spjd return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN, 1642185029Spjd "cannot receive"))); 1643185029Spjd } 1644185029Spjd 1645185029Spjd if (zc) { 1646185029Spjd if (byteswap) 1647185029Spjd fletcher_4_incremental_byteswap(buf, ilen, zc); 1648185029Spjd else 1649185029Spjd fletcher_4_incremental_native(buf, ilen, zc); 1650185029Spjd } 1651185029Spjd return (0); 1652185029Spjd} 1653185029Spjd 1654185029Spjdstatic int 1655185029Spjdrecv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp, 1656185029Spjd boolean_t byteswap, zio_cksum_t *zc) 1657185029Spjd{ 1658185029Spjd char *buf; 1659185029Spjd int err; 1660185029Spjd 1661185029Spjd buf = zfs_alloc(hdl, len); 1662185029Spjd if (buf == NULL) 1663185029Spjd return (ENOMEM); 1664185029Spjd 1665185029Spjd err = recv_read(hdl, fd, buf, len, byteswap, zc); 1666185029Spjd if (err != 0) { 1667185029Spjd free(buf); 1668185029Spjd return (err); 1669185029Spjd } 1670185029Spjd 1671185029Spjd err = nvlist_unpack(buf, len, nvp, 0); 1672185029Spjd free(buf); 1673185029Spjd if (err != 0) { 1674185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " 1675185029Spjd "stream (malformed nvlist)")); 1676185029Spjd return (EINVAL); 1677185029Spjd } 1678185029Spjd return (0); 1679185029Spjd} 1680185029Spjd 1681185029Spjdstatic int 1682185029Spjdrecv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname, 1683228103Smm int baselen, char *newname, recvflags_t *flags) 1684185029Spjd{ 1685185029Spjd static int seq; 1686185029Spjd zfs_cmd_t zc = { 0 }; 1687185029Spjd int err; 1688185029Spjd prop_changelist_t *clp; 1689185029Spjd zfs_handle_t *zhp; 1690185029Spjd 1691185029Spjd zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); 1692185029Spjd if (zhp == NULL) 1693185029Spjd return (-1); 1694185029Spjd clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 1695228103Smm flags->force ? MS_FORCE : 0); 1696185029Spjd zfs_close(zhp); 1697185029Spjd if (clp == NULL) 1698185029Spjd return (-1); 1699185029Spjd err = changelist_prefix(clp); 1700185029Spjd if (err) 1701185029Spjd return (err); 1702185029Spjd 1703219089Spjd zc.zc_objset_type = DMU_OST_ZFS; 1704219089Spjd (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); 1705219089Spjd 1706185029Spjd if (tryname) { 1707185029Spjd (void) strcpy(newname, tryname); 1708185029Spjd 1709185029Spjd (void) strlcpy(zc.zc_value, tryname, sizeof (zc.zc_value)); 1710185029Spjd 1711228103Smm if (flags->verbose) { 1712185029Spjd (void) printf("attempting rename %s to %s\n", 1713185029Spjd zc.zc_name, zc.zc_value); 1714185029Spjd } 1715185029Spjd err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); 1716185029Spjd if (err == 0) 1717185029Spjd changelist_rename(clp, name, tryname); 1718185029Spjd } else { 1719185029Spjd err = ENOENT; 1720185029Spjd } 1721185029Spjd 1722185029Spjd if (err != 0 && strncmp(name+baselen, "recv-", 5) != 0) { 1723185029Spjd seq++; 1724185029Spjd 1725185029Spjd (void) strncpy(newname, name, baselen); 1726185029Spjd (void) snprintf(newname+baselen, ZFS_MAXNAMELEN-baselen, 1727185029Spjd "recv-%u-%u", getpid(), seq); 1728185029Spjd (void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value)); 1729185029Spjd 1730228103Smm if (flags->verbose) { 1731185029Spjd (void) printf("failed - trying rename %s to %s\n", 1732185029Spjd zc.zc_name, zc.zc_value); 1733185029Spjd } 1734185029Spjd err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); 1735185029Spjd if (err == 0) 1736185029Spjd changelist_rename(clp, name, newname); 1737228103Smm if (err && flags->verbose) { 1738185029Spjd (void) printf("failed (%u) - " 1739185029Spjd "will try again on next pass\n", errno); 1740185029Spjd } 1741185029Spjd err = EAGAIN; 1742228103Smm } else if (flags->verbose) { 1743185029Spjd if (err == 0) 1744185029Spjd (void) printf("success\n"); 1745185029Spjd else 1746185029Spjd (void) printf("failed (%u)\n", errno); 1747185029Spjd } 1748185029Spjd 1749185029Spjd (void) changelist_postfix(clp); 1750185029Spjd changelist_free(clp); 1751185029Spjd 1752185029Spjd return (err); 1753185029Spjd} 1754185029Spjd 1755185029Spjdstatic int 1756185029Spjdrecv_destroy(libzfs_handle_t *hdl, const char *name, int baselen, 1757228103Smm char *newname, recvflags_t *flags) 1758185029Spjd{ 1759185029Spjd zfs_cmd_t zc = { 0 }; 1760185029Spjd int err = 0; 1761185029Spjd prop_changelist_t *clp; 1762185029Spjd zfs_handle_t *zhp; 1763219089Spjd boolean_t defer = B_FALSE; 1764219089Spjd int spa_version; 1765185029Spjd 1766185029Spjd zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); 1767185029Spjd if (zhp == NULL) 1768185029Spjd return (-1); 1769185029Spjd clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 1770228103Smm flags->force ? MS_FORCE : 0); 1771219089Spjd if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && 1772219089Spjd zfs_spa_version(zhp, &spa_version) == 0 && 1773219089Spjd spa_version >= SPA_VERSION_USERREFS) 1774219089Spjd defer = B_TRUE; 1775185029Spjd zfs_close(zhp); 1776185029Spjd if (clp == NULL) 1777185029Spjd return (-1); 1778185029Spjd err = changelist_prefix(clp); 1779185029Spjd if (err) 1780185029Spjd return (err); 1781185029Spjd 1782185029Spjd zc.zc_objset_type = DMU_OST_ZFS; 1783219089Spjd zc.zc_defer_destroy = defer; 1784185029Spjd (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); 1785185029Spjd 1786228103Smm if (flags->verbose) 1787185029Spjd (void) printf("attempting destroy %s\n", zc.zc_name); 1788185029Spjd err = ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc); 1789185029Spjd if (err == 0) { 1790228103Smm if (flags->verbose) 1791185029Spjd (void) printf("success\n"); 1792185029Spjd changelist_remove(clp, zc.zc_name); 1793185029Spjd } 1794185029Spjd 1795185029Spjd (void) changelist_postfix(clp); 1796185029Spjd changelist_free(clp); 1797185029Spjd 1798219089Spjd /* 1799219089Spjd * Deferred destroy might destroy the snapshot or only mark it to be 1800219089Spjd * destroyed later, and it returns success in either case. 1801219089Spjd */ 1802219089Spjd if (err != 0 || (defer && zfs_dataset_exists(hdl, name, 1803219089Spjd ZFS_TYPE_SNAPSHOT))) { 1804185029Spjd err = recv_rename(hdl, name, NULL, baselen, newname, flags); 1805219089Spjd } 1806185029Spjd 1807185029Spjd return (err); 1808185029Spjd} 1809185029Spjd 1810185029Spjdtypedef struct guid_to_name_data { 1811185029Spjd uint64_t guid; 1812185029Spjd char *name; 1813228103Smm char *skip; 1814185029Spjd} guid_to_name_data_t; 1815185029Spjd 1816185029Spjdstatic int 1817185029Spjdguid_to_name_cb(zfs_handle_t *zhp, void *arg) 1818185029Spjd{ 1819185029Spjd guid_to_name_data_t *gtnd = arg; 1820185029Spjd int err; 1821185029Spjd 1822228103Smm if (gtnd->skip != NULL && 1823228103Smm strcmp(zhp->zfs_name, gtnd->skip) == 0) { 1824228103Smm return (0); 1825228103Smm } 1826228103Smm 1827185029Spjd if (zhp->zfs_dmustats.dds_guid == gtnd->guid) { 1828185029Spjd (void) strcpy(gtnd->name, zhp->zfs_name); 1829219089Spjd zfs_close(zhp); 1830185029Spjd return (EEXIST); 1831185029Spjd } 1832228103Smm 1833185029Spjd err = zfs_iter_children(zhp, guid_to_name_cb, gtnd); 1834185029Spjd zfs_close(zhp); 1835185029Spjd return (err); 1836185029Spjd} 1837185029Spjd 1838228103Smm/* 1839228103Smm * Attempt to find the local dataset associated with this guid. In the case of 1840228103Smm * multiple matches, we attempt to find the "best" match by searching 1841228103Smm * progressively larger portions of the hierarchy. This allows one to send a 1842228103Smm * tree of datasets individually and guarantee that we will find the source 1843228103Smm * guid within that hierarchy, even if there are multiple matches elsewhere. 1844228103Smm */ 1845185029Spjdstatic int 1846185029Spjdguid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid, 1847185029Spjd char *name) 1848185029Spjd{ 1849185029Spjd /* exhaustive search all local snapshots */ 1850228103Smm char pname[ZFS_MAXNAMELEN]; 1851185029Spjd guid_to_name_data_t gtnd; 1852185029Spjd int err = 0; 1853185029Spjd zfs_handle_t *zhp; 1854185029Spjd char *cp; 1855185029Spjd 1856185029Spjd gtnd.guid = guid; 1857185029Spjd gtnd.name = name; 1858228103Smm gtnd.skip = NULL; 1859185029Spjd 1860228103Smm (void) strlcpy(pname, parent, sizeof (pname)); 1861185029Spjd 1862228103Smm /* 1863228103Smm * Search progressively larger portions of the hierarchy. This will 1864228103Smm * select the "most local" version of the origin snapshot in the case 1865228103Smm * that there are multiple matching snapshots in the system. 1866228103Smm */ 1867228103Smm while ((cp = strrchr(pname, '/')) != NULL) { 1868228103Smm 1869228103Smm /* Chop off the last component and open the parent */ 1870185029Spjd *cp = '\0'; 1871228103Smm zhp = make_dataset_handle(hdl, pname); 1872185029Spjd 1873228103Smm if (zhp == NULL) 1874228103Smm continue; 1875228103Smm 1876185029Spjd err = zfs_iter_children(zhp, guid_to_name_cb, >nd); 1877185029Spjd zfs_close(zhp); 1878228103Smm if (err == EEXIST) 1879228103Smm return (0); 1880228103Smm 1881228103Smm /* 1882228103Smm * Remember the dataset that we already searched, so we 1883228103Smm * skip it next time through. 1884228103Smm */ 1885228103Smm gtnd.skip = pname; 1886185029Spjd } 1887185029Spjd 1888228103Smm return (ENOENT); 1889185029Spjd} 1890185029Spjd 1891185029Spjd/* 1892228103Smm * Return +1 if guid1 is before guid2, 0 if they are the same, and -1 if 1893228103Smm * guid1 is after guid2. 1894185029Spjd */ 1895185029Spjdstatic int 1896185029Spjdcreated_before(libzfs_handle_t *hdl, avl_tree_t *avl, 1897185029Spjd uint64_t guid1, uint64_t guid2) 1898185029Spjd{ 1899185029Spjd nvlist_t *nvfs; 1900185029Spjd char *fsname, *snapname; 1901185029Spjd char buf[ZFS_MAXNAMELEN]; 1902185029Spjd int rv; 1903228103Smm zfs_handle_t *guid1hdl, *guid2hdl; 1904228103Smm uint64_t create1, create2; 1905185029Spjd 1906185029Spjd if (guid2 == 0) 1907185029Spjd return (0); 1908185029Spjd if (guid1 == 0) 1909185029Spjd return (1); 1910185029Spjd 1911185029Spjd nvfs = fsavl_find(avl, guid1, &snapname); 1912185029Spjd VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); 1913185029Spjd (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); 1914228103Smm guid1hdl = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); 1915228103Smm if (guid1hdl == NULL) 1916185029Spjd return (-1); 1917185029Spjd 1918185029Spjd nvfs = fsavl_find(avl, guid2, &snapname); 1919185029Spjd VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); 1920185029Spjd (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); 1921228103Smm guid2hdl = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); 1922228103Smm if (guid2hdl == NULL) { 1923228103Smm zfs_close(guid1hdl); 1924185029Spjd return (-1); 1925185029Spjd } 1926185029Spjd 1927228103Smm create1 = zfs_prop_get_int(guid1hdl, ZFS_PROP_CREATETXG); 1928228103Smm create2 = zfs_prop_get_int(guid2hdl, ZFS_PROP_CREATETXG); 1929185029Spjd 1930228103Smm if (create1 < create2) 1931228103Smm rv = -1; 1932228103Smm else if (create1 > create2) 1933228103Smm rv = +1; 1934228103Smm else 1935228103Smm rv = 0; 1936185029Spjd 1937228103Smm zfs_close(guid1hdl); 1938228103Smm zfs_close(guid2hdl); 1939228103Smm 1940185029Spjd return (rv); 1941185029Spjd} 1942185029Spjd 1943185029Spjdstatic int 1944185029Spjdrecv_incremental_replication(libzfs_handle_t *hdl, const char *tofs, 1945228103Smm recvflags_t *flags, nvlist_t *stream_nv, avl_tree_t *stream_avl, 1946219089Spjd nvlist_t *renamed) 1947185029Spjd{ 1948185029Spjd nvlist_t *local_nv; 1949185029Spjd avl_tree_t *local_avl; 1950185029Spjd nvpair_t *fselem, *nextfselem; 1951219089Spjd char *fromsnap; 1952185029Spjd char newname[ZFS_MAXNAMELEN]; 1953185029Spjd int error; 1954219089Spjd boolean_t needagain, progress, recursive; 1955209962Smm char *s1, *s2; 1956185029Spjd 1957185029Spjd VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap)); 1958185029Spjd 1959219089Spjd recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") == 1960219089Spjd ENOENT); 1961219089Spjd 1962228103Smm if (flags->dryrun) 1963185029Spjd return (0); 1964185029Spjd 1965185029Spjdagain: 1966185029Spjd needagain = progress = B_FALSE; 1967185029Spjd 1968185029Spjd if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL, 1969219089Spjd recursive, &local_nv, &local_avl)) != 0) 1970185029Spjd return (error); 1971185029Spjd 1972185029Spjd /* 1973185029Spjd * Process deletes and renames 1974185029Spjd */ 1975185029Spjd for (fselem = nvlist_next_nvpair(local_nv, NULL); 1976185029Spjd fselem; fselem = nextfselem) { 1977185029Spjd nvlist_t *nvfs, *snaps; 1978185029Spjd nvlist_t *stream_nvfs = NULL; 1979185029Spjd nvpair_t *snapelem, *nextsnapelem; 1980185029Spjd uint64_t fromguid = 0; 1981185029Spjd uint64_t originguid = 0; 1982185029Spjd uint64_t stream_originguid = 0; 1983185029Spjd uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid; 1984219089Spjd char *fsname, *stream_fsname; 1985185029Spjd 1986185029Spjd nextfselem = nvlist_next_nvpair(local_nv, fselem); 1987185029Spjd 1988185029Spjd VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); 1989185029Spjd VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); 1990185029Spjd VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); 1991185029Spjd VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap", 1992185029Spjd &parent_fromsnap_guid)); 1993185029Spjd (void) nvlist_lookup_uint64(nvfs, "origin", &originguid); 1994185029Spjd 1995185029Spjd /* 1996185029Spjd * First find the stream's fs, so we can check for 1997185029Spjd * a different origin (due to "zfs promote") 1998185029Spjd */ 1999185029Spjd for (snapelem = nvlist_next_nvpair(snaps, NULL); 2000185029Spjd snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) { 2001185029Spjd uint64_t thisguid; 2002185029Spjd 2003185029Spjd VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); 2004185029Spjd stream_nvfs = fsavl_find(stream_avl, thisguid, NULL); 2005185029Spjd 2006185029Spjd if (stream_nvfs != NULL) 2007185029Spjd break; 2008185029Spjd } 2009185029Spjd 2010185029Spjd /* check for promote */ 2011185029Spjd (void) nvlist_lookup_uint64(stream_nvfs, "origin", 2012185029Spjd &stream_originguid); 2013185029Spjd if (stream_nvfs && originguid != stream_originguid) { 2014185029Spjd switch (created_before(hdl, local_avl, 2015185029Spjd stream_originguid, originguid)) { 2016185029Spjd case 1: { 2017185029Spjd /* promote it! */ 2018185029Spjd zfs_cmd_t zc = { 0 }; 2019185029Spjd nvlist_t *origin_nvfs; 2020185029Spjd char *origin_fsname; 2021185029Spjd 2022228103Smm if (flags->verbose) 2023185029Spjd (void) printf("promoting %s\n", fsname); 2024185029Spjd 2025185029Spjd origin_nvfs = fsavl_find(local_avl, originguid, 2026185029Spjd NULL); 2027185029Spjd VERIFY(0 == nvlist_lookup_string(origin_nvfs, 2028185029Spjd "name", &origin_fsname)); 2029185029Spjd (void) strlcpy(zc.zc_value, origin_fsname, 2030185029Spjd sizeof (zc.zc_value)); 2031185029Spjd (void) strlcpy(zc.zc_name, fsname, 2032185029Spjd sizeof (zc.zc_name)); 2033185029Spjd error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 2034185029Spjd if (error == 0) 2035185029Spjd progress = B_TRUE; 2036185029Spjd break; 2037185029Spjd } 2038185029Spjd default: 2039185029Spjd break; 2040185029Spjd case -1: 2041185029Spjd fsavl_destroy(local_avl); 2042185029Spjd nvlist_free(local_nv); 2043185029Spjd return (-1); 2044185029Spjd } 2045185029Spjd /* 2046185029Spjd * We had/have the wrong origin, therefore our 2047185029Spjd * list of snapshots is wrong. Need to handle 2048185029Spjd * them on the next pass. 2049185029Spjd */ 2050185029Spjd needagain = B_TRUE; 2051185029Spjd continue; 2052185029Spjd } 2053185029Spjd 2054185029Spjd for (snapelem = nvlist_next_nvpair(snaps, NULL); 2055185029Spjd snapelem; snapelem = nextsnapelem) { 2056185029Spjd uint64_t thisguid; 2057185029Spjd char *stream_snapname; 2058185029Spjd nvlist_t *found, *props; 2059185029Spjd 2060185029Spjd nextsnapelem = nvlist_next_nvpair(snaps, snapelem); 2061185029Spjd 2062185029Spjd VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); 2063185029Spjd found = fsavl_find(stream_avl, thisguid, 2064185029Spjd &stream_snapname); 2065185029Spjd 2066185029Spjd /* check for delete */ 2067185029Spjd if (found == NULL) { 2068185029Spjd char name[ZFS_MAXNAMELEN]; 2069185029Spjd 2070228103Smm if (!flags->force) 2071185029Spjd continue; 2072185029Spjd 2073185029Spjd (void) snprintf(name, sizeof (name), "%s@%s", 2074185029Spjd fsname, nvpair_name(snapelem)); 2075185029Spjd 2076185029Spjd error = recv_destroy(hdl, name, 2077185029Spjd strlen(fsname)+1, newname, flags); 2078185029Spjd if (error) 2079185029Spjd needagain = B_TRUE; 2080185029Spjd else 2081185029Spjd progress = B_TRUE; 2082185029Spjd continue; 2083185029Spjd } 2084185029Spjd 2085185029Spjd stream_nvfs = found; 2086185029Spjd 2087185029Spjd if (0 == nvlist_lookup_nvlist(stream_nvfs, "snapprops", 2088185029Spjd &props) && 0 == nvlist_lookup_nvlist(props, 2089185029Spjd stream_snapname, &props)) { 2090185029Spjd zfs_cmd_t zc = { 0 }; 2091185029Spjd 2092219089Spjd zc.zc_cookie = B_TRUE; /* received */ 2093185029Spjd (void) snprintf(zc.zc_name, sizeof (zc.zc_name), 2094185029Spjd "%s@%s", fsname, nvpair_name(snapelem)); 2095185029Spjd if (zcmd_write_src_nvlist(hdl, &zc, 2096185029Spjd props) == 0) { 2097185029Spjd (void) zfs_ioctl(hdl, 2098185029Spjd ZFS_IOC_SET_PROP, &zc); 2099185029Spjd zcmd_free_nvlists(&zc); 2100185029Spjd } 2101185029Spjd } 2102185029Spjd 2103185029Spjd /* check for different snapname */ 2104185029Spjd if (strcmp(nvpair_name(snapelem), 2105185029Spjd stream_snapname) != 0) { 2106185029Spjd char name[ZFS_MAXNAMELEN]; 2107185029Spjd char tryname[ZFS_MAXNAMELEN]; 2108185029Spjd 2109185029Spjd (void) snprintf(name, sizeof (name), "%s@%s", 2110185029Spjd fsname, nvpair_name(snapelem)); 2111185029Spjd (void) snprintf(tryname, sizeof (name), "%s@%s", 2112185029Spjd fsname, stream_snapname); 2113185029Spjd 2114185029Spjd error = recv_rename(hdl, name, tryname, 2115185029Spjd strlen(fsname)+1, newname, flags); 2116185029Spjd if (error) 2117185029Spjd needagain = B_TRUE; 2118185029Spjd else 2119185029Spjd progress = B_TRUE; 2120185029Spjd } 2121185029Spjd 2122185029Spjd if (strcmp(stream_snapname, fromsnap) == 0) 2123185029Spjd fromguid = thisguid; 2124185029Spjd } 2125185029Spjd 2126185029Spjd /* check for delete */ 2127185029Spjd if (stream_nvfs == NULL) { 2128228103Smm if (!flags->force) 2129185029Spjd continue; 2130185029Spjd 2131185029Spjd error = recv_destroy(hdl, fsname, strlen(tofs)+1, 2132185029Spjd newname, flags); 2133185029Spjd if (error) 2134185029Spjd needagain = B_TRUE; 2135185029Spjd else 2136185029Spjd progress = B_TRUE; 2137185029Spjd continue; 2138185029Spjd } 2139185029Spjd 2140219089Spjd if (fromguid == 0) { 2141228103Smm if (flags->verbose) { 2142219089Spjd (void) printf("local fs %s does not have " 2143219089Spjd "fromsnap (%s in stream); must have " 2144219089Spjd "been deleted locally; ignoring\n", 2145219089Spjd fsname, fromsnap); 2146219089Spjd } 2147185029Spjd continue; 2148185029Spjd } 2149185029Spjd 2150185029Spjd VERIFY(0 == nvlist_lookup_string(stream_nvfs, 2151185029Spjd "name", &stream_fsname)); 2152185029Spjd VERIFY(0 == nvlist_lookup_uint64(stream_nvfs, 2153185029Spjd "parentfromsnap", &stream_parent_fromsnap_guid)); 2154185029Spjd 2155209962Smm s1 = strrchr(fsname, '/'); 2156209962Smm s2 = strrchr(stream_fsname, '/'); 2157209962Smm 2158219089Spjd /* 2159219089Spjd * Check for rename. If the exact receive path is specified, it 2160219089Spjd * does not count as a rename, but we still need to check the 2161219089Spjd * datasets beneath it. 2162219089Spjd */ 2163185029Spjd if ((stream_parent_fromsnap_guid != 0 && 2164219089Spjd parent_fromsnap_guid != 0 && 2165185029Spjd stream_parent_fromsnap_guid != parent_fromsnap_guid) || 2166228103Smm ((flags->isprefix || strcmp(tofs, fsname) != 0) && 2167219089Spjd (s1 != NULL) && (s2 != NULL) && strcmp(s1, s2) != 0)) { 2168185029Spjd nvlist_t *parent; 2169185029Spjd char tryname[ZFS_MAXNAMELEN]; 2170185029Spjd 2171185029Spjd parent = fsavl_find(local_avl, 2172185029Spjd stream_parent_fromsnap_guid, NULL); 2173185029Spjd /* 2174185029Spjd * NB: parent might not be found if we used the 2175185029Spjd * tosnap for stream_parent_fromsnap_guid, 2176185029Spjd * because the parent is a newly-created fs; 2177185029Spjd * we'll be able to rename it after we recv the 2178185029Spjd * new fs. 2179185029Spjd */ 2180185029Spjd if (parent != NULL) { 2181185029Spjd char *pname; 2182185029Spjd 2183185029Spjd VERIFY(0 == nvlist_lookup_string(parent, "name", 2184185029Spjd &pname)); 2185185029Spjd (void) snprintf(tryname, sizeof (tryname), 2186219089Spjd "%s%s", pname, strrchr(stream_fsname, '/')); 2187185029Spjd } else { 2188185029Spjd tryname[0] = '\0'; 2189228103Smm if (flags->verbose) { 2190185029Spjd (void) printf("local fs %s new parent " 2191185029Spjd "not found\n", fsname); 2192185029Spjd } 2193185029Spjd } 2194185029Spjd 2195219089Spjd newname[0] = '\0'; 2196219089Spjd 2197185029Spjd error = recv_rename(hdl, fsname, tryname, 2198185029Spjd strlen(tofs)+1, newname, flags); 2199219089Spjd 2200219089Spjd if (renamed != NULL && newname[0] != '\0') { 2201219089Spjd VERIFY(0 == nvlist_add_boolean(renamed, 2202219089Spjd newname)); 2203219089Spjd } 2204219089Spjd 2205185029Spjd if (error) 2206185029Spjd needagain = B_TRUE; 2207185029Spjd else 2208185029Spjd progress = B_TRUE; 2209185029Spjd } 2210185029Spjd } 2211185029Spjd 2212185029Spjd fsavl_destroy(local_avl); 2213185029Spjd nvlist_free(local_nv); 2214185029Spjd 2215185029Spjd if (needagain && progress) { 2216185029Spjd /* do another pass to fix up temporary names */ 2217228103Smm if (flags->verbose) 2218185029Spjd (void) printf("another pass:\n"); 2219185029Spjd goto again; 2220185029Spjd } 2221185029Spjd 2222185029Spjd return (needagain); 2223185029Spjd} 2224185029Spjd 2225185029Spjdstatic int 2226185029Spjdzfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname, 2227228103Smm recvflags_t *flags, dmu_replay_record_t *drr, zio_cksum_t *zc, 2228219089Spjd char **top_zfs, int cleanup_fd, uint64_t *action_handlep) 2229185029Spjd{ 2230185029Spjd nvlist_t *stream_nv = NULL; 2231185029Spjd avl_tree_t *stream_avl = NULL; 2232185029Spjd char *fromsnap = NULL; 2233219089Spjd char *cp; 2234185029Spjd char tofs[ZFS_MAXNAMELEN]; 2235219089Spjd char sendfs[ZFS_MAXNAMELEN]; 2236185029Spjd char errbuf[1024]; 2237185029Spjd dmu_replay_record_t drre; 2238185029Spjd int error; 2239185029Spjd boolean_t anyerr = B_FALSE; 2240185029Spjd boolean_t softerr = B_FALSE; 2241219089Spjd boolean_t recursive; 2242185029Spjd 2243185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 2244185029Spjd "cannot receive")); 2245185029Spjd 2246185029Spjd assert(drr->drr_type == DRR_BEGIN); 2247185029Spjd assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC); 2248219089Spjd assert(DMU_GET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo) == 2249219089Spjd DMU_COMPOUNDSTREAM); 2250185029Spjd 2251185029Spjd /* 2252185029Spjd * Read in the nvlist from the stream. 2253185029Spjd */ 2254185029Spjd if (drr->drr_payloadlen != 0) { 2255185029Spjd error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen, 2256228103Smm &stream_nv, flags->byteswap, zc); 2257185029Spjd if (error) { 2258185029Spjd error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); 2259185029Spjd goto out; 2260185029Spjd } 2261185029Spjd } 2262185029Spjd 2263219089Spjd recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") == 2264219089Spjd ENOENT); 2265219089Spjd 2266219089Spjd if (recursive && strchr(destname, '@')) { 2267219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2268219089Spjd "cannot specify snapshot name for multi-snapshot stream")); 2269219089Spjd error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); 2270219089Spjd goto out; 2271219089Spjd } 2272219089Spjd 2273185029Spjd /* 2274185029Spjd * Read in the end record and verify checksum. 2275185029Spjd */ 2276185029Spjd if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre), 2277228103Smm flags->byteswap, NULL))) 2278185029Spjd goto out; 2279228103Smm if (flags->byteswap) { 2280185029Spjd drre.drr_type = BSWAP_32(drre.drr_type); 2281185029Spjd drre.drr_u.drr_end.drr_checksum.zc_word[0] = 2282185029Spjd BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]); 2283185029Spjd drre.drr_u.drr_end.drr_checksum.zc_word[1] = 2284185029Spjd BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]); 2285185029Spjd drre.drr_u.drr_end.drr_checksum.zc_word[2] = 2286185029Spjd BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]); 2287185029Spjd drre.drr_u.drr_end.drr_checksum.zc_word[3] = 2288185029Spjd BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]); 2289185029Spjd } 2290185029Spjd if (drre.drr_type != DRR_END) { 2291185029Spjd error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); 2292185029Spjd goto out; 2293185029Spjd } 2294185029Spjd if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) { 2295185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2296185029Spjd "incorrect header checksum")); 2297185029Spjd error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); 2298185029Spjd goto out; 2299185029Spjd } 2300185029Spjd 2301185029Spjd (void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap); 2302185029Spjd 2303185029Spjd if (drr->drr_payloadlen != 0) { 2304185029Spjd nvlist_t *stream_fss; 2305185029Spjd 2306185029Spjd VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss", 2307185029Spjd &stream_fss)); 2308185029Spjd if ((stream_avl = fsavl_create(stream_fss)) == NULL) { 2309185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2310185029Spjd "couldn't allocate avl tree")); 2311185029Spjd error = zfs_error(hdl, EZFS_NOMEM, errbuf); 2312185029Spjd goto out; 2313185029Spjd } 2314185029Spjd 2315185029Spjd if (fromsnap != NULL) { 2316219089Spjd nvlist_t *renamed = NULL; 2317219089Spjd nvpair_t *pair = NULL; 2318219089Spjd 2319185029Spjd (void) strlcpy(tofs, destname, ZFS_MAXNAMELEN); 2320228103Smm if (flags->isprefix) { 2321219089Spjd struct drr_begin *drrb = &drr->drr_u.drr_begin; 2322219089Spjd int i; 2323219089Spjd 2324228103Smm if (flags->istail) { 2325219089Spjd cp = strrchr(drrb->drr_toname, '/'); 2326219089Spjd if (cp == NULL) { 2327219089Spjd (void) strlcat(tofs, "/", 2328219089Spjd ZFS_MAXNAMELEN); 2329219089Spjd i = 0; 2330219089Spjd } else { 2331219089Spjd i = (cp - drrb->drr_toname); 2332219089Spjd } 2333219089Spjd } else { 2334219089Spjd i = strcspn(drrb->drr_toname, "/@"); 2335219089Spjd } 2336185029Spjd /* zfs_receive_one() will create_parents() */ 2337219089Spjd (void) strlcat(tofs, &drrb->drr_toname[i], 2338185029Spjd ZFS_MAXNAMELEN); 2339185029Spjd *strchr(tofs, '@') = '\0'; 2340185029Spjd } 2341219089Spjd 2342228103Smm if (recursive && !flags->dryrun && !flags->nomount) { 2343219089Spjd VERIFY(0 == nvlist_alloc(&renamed, 2344219089Spjd NV_UNIQUE_NAME, 0)); 2345219089Spjd } 2346219089Spjd 2347219089Spjd softerr = recv_incremental_replication(hdl, tofs, flags, 2348219089Spjd stream_nv, stream_avl, renamed); 2349219089Spjd 2350219089Spjd /* Unmount renamed filesystems before receiving. */ 2351219089Spjd while ((pair = nvlist_next_nvpair(renamed, 2352219089Spjd pair)) != NULL) { 2353219089Spjd zfs_handle_t *zhp; 2354219089Spjd prop_changelist_t *clp = NULL; 2355219089Spjd 2356219089Spjd zhp = zfs_open(hdl, nvpair_name(pair), 2357219089Spjd ZFS_TYPE_FILESYSTEM); 2358219089Spjd if (zhp != NULL) { 2359219089Spjd clp = changelist_gather(zhp, 2360219089Spjd ZFS_PROP_MOUNTPOINT, 0, 0); 2361219089Spjd zfs_close(zhp); 2362219089Spjd if (clp != NULL) { 2363219089Spjd softerr |= 2364219089Spjd changelist_prefix(clp); 2365219089Spjd changelist_free(clp); 2366219089Spjd } 2367219089Spjd } 2368219089Spjd } 2369219089Spjd 2370219089Spjd nvlist_free(renamed); 2371185029Spjd } 2372185029Spjd } 2373185029Spjd 2374219089Spjd /* 2375219089Spjd * Get the fs specified by the first path in the stream (the top level 2376219089Spjd * specified by 'zfs send') and pass it to each invocation of 2377219089Spjd * zfs_receive_one(). 2378219089Spjd */ 2379219089Spjd (void) strlcpy(sendfs, drr->drr_u.drr_begin.drr_toname, 2380219089Spjd ZFS_MAXNAMELEN); 2381219089Spjd if ((cp = strchr(sendfs, '@')) != NULL) 2382219089Spjd *cp = '\0'; 2383185029Spjd 2384185029Spjd /* Finally, receive each contained stream */ 2385185029Spjd do { 2386185029Spjd /* 2387185029Spjd * we should figure out if it has a recoverable 2388185029Spjd * error, in which case do a recv_skip() and drive on. 2389185029Spjd * Note, if we fail due to already having this guid, 2390185029Spjd * zfs_receive_one() will take care of it (ie, 2391185029Spjd * recv_skip() and return 0). 2392185029Spjd */ 2393185029Spjd error = zfs_receive_impl(hdl, destname, flags, fd, 2394219089Spjd sendfs, stream_nv, stream_avl, top_zfs, cleanup_fd, 2395219089Spjd action_handlep); 2396185029Spjd if (error == ENODATA) { 2397185029Spjd error = 0; 2398185029Spjd break; 2399185029Spjd } 2400185029Spjd anyerr |= error; 2401185029Spjd } while (error == 0); 2402185029Spjd 2403185029Spjd if (drr->drr_payloadlen != 0 && fromsnap != NULL) { 2404185029Spjd /* 2405185029Spjd * Now that we have the fs's they sent us, try the 2406185029Spjd * renames again. 2407185029Spjd */ 2408185029Spjd softerr = recv_incremental_replication(hdl, tofs, flags, 2409219089Spjd stream_nv, stream_avl, NULL); 2410185029Spjd } 2411185029Spjd 2412185029Spjdout: 2413185029Spjd fsavl_destroy(stream_avl); 2414185029Spjd if (stream_nv) 2415185029Spjd nvlist_free(stream_nv); 2416185029Spjd if (softerr) 2417185029Spjd error = -2; 2418185029Spjd if (anyerr) 2419185029Spjd error = -1; 2420185029Spjd return (error); 2421185029Spjd} 2422185029Spjd 2423219089Spjdstatic void 2424219089Spjdtrunc_prop_errs(int truncated) 2425219089Spjd{ 2426219089Spjd ASSERT(truncated != 0); 2427219089Spjd 2428219089Spjd if (truncated == 1) 2429219089Spjd (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 2430219089Spjd "1 more property could not be set\n")); 2431219089Spjd else 2432219089Spjd (void) fprintf(stderr, dgettext(TEXT_DOMAIN, 2433219089Spjd "%d more properties could not be set\n"), truncated); 2434219089Spjd} 2435219089Spjd 2436185029Spjdstatic int 2437185029Spjdrecv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap) 2438185029Spjd{ 2439185029Spjd dmu_replay_record_t *drr; 2440185029Spjd void *buf = malloc(1<<20); 2441219089Spjd char errbuf[1024]; 2442185029Spjd 2443219089Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 2444219089Spjd "cannot receive:")); 2445219089Spjd 2446185029Spjd /* XXX would be great to use lseek if possible... */ 2447185029Spjd drr = buf; 2448185029Spjd 2449185029Spjd while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t), 2450185029Spjd byteswap, NULL) == 0) { 2451185029Spjd if (byteswap) 2452185029Spjd drr->drr_type = BSWAP_32(drr->drr_type); 2453185029Spjd 2454185029Spjd switch (drr->drr_type) { 2455185029Spjd case DRR_BEGIN: 2456185029Spjd /* NB: not to be used on v2 stream packages */ 2457219089Spjd if (drr->drr_payloadlen != 0) { 2458219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2459219089Spjd "invalid substream header")); 2460219089Spjd return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); 2461219089Spjd } 2462185029Spjd break; 2463185029Spjd 2464185029Spjd case DRR_END: 2465185029Spjd free(buf); 2466185029Spjd return (0); 2467185029Spjd 2468185029Spjd case DRR_OBJECT: 2469185029Spjd if (byteswap) { 2470185029Spjd drr->drr_u.drr_object.drr_bonuslen = 2471185029Spjd BSWAP_32(drr->drr_u.drr_object. 2472185029Spjd drr_bonuslen); 2473185029Spjd } 2474185029Spjd (void) recv_read(hdl, fd, buf, 2475185029Spjd P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8), 2476185029Spjd B_FALSE, NULL); 2477185029Spjd break; 2478185029Spjd 2479185029Spjd case DRR_WRITE: 2480185029Spjd if (byteswap) { 2481185029Spjd drr->drr_u.drr_write.drr_length = 2482185029Spjd BSWAP_64(drr->drr_u.drr_write.drr_length); 2483185029Spjd } 2484185029Spjd (void) recv_read(hdl, fd, buf, 2485185029Spjd drr->drr_u.drr_write.drr_length, B_FALSE, NULL); 2486185029Spjd break; 2487219089Spjd case DRR_SPILL: 2488219089Spjd if (byteswap) { 2489219089Spjd drr->drr_u.drr_write.drr_length = 2490219089Spjd BSWAP_64(drr->drr_u.drr_spill.drr_length); 2491219089Spjd } 2492219089Spjd (void) recv_read(hdl, fd, buf, 2493219089Spjd drr->drr_u.drr_spill.drr_length, B_FALSE, NULL); 2494219089Spjd break; 2495219089Spjd case DRR_WRITE_BYREF: 2496185029Spjd case DRR_FREEOBJECTS: 2497185029Spjd case DRR_FREE: 2498185029Spjd break; 2499185029Spjd 2500185029Spjd default: 2501219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2502219089Spjd "invalid record type")); 2503219089Spjd return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); 2504185029Spjd } 2505185029Spjd } 2506185029Spjd 2507185029Spjd free(buf); 2508185029Spjd return (-1); 2509185029Spjd} 2510185029Spjd 2511185029Spjd/* 2512185029Spjd * Restores a backup of tosnap from the file descriptor specified by infd. 2513185029Spjd */ 2514185029Spjdstatic int 2515185029Spjdzfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap, 2516228103Smm recvflags_t *flags, dmu_replay_record_t *drr, 2517219089Spjd dmu_replay_record_t *drr_noswap, const char *sendfs, 2518219089Spjd nvlist_t *stream_nv, avl_tree_t *stream_avl, char **top_zfs, int cleanup_fd, 2519219089Spjd uint64_t *action_handlep) 2520185029Spjd{ 2521185029Spjd zfs_cmd_t zc = { 0 }; 2522185029Spjd time_t begin_time; 2523219089Spjd int ioctl_err, ioctl_errno, err; 2524185029Spjd char *cp; 2525185029Spjd struct drr_begin *drrb = &drr->drr_u.drr_begin; 2526185029Spjd char errbuf[1024]; 2527219089Spjd char prop_errbuf[1024]; 2528219089Spjd const char *chopprefix; 2529185029Spjd boolean_t newfs = B_FALSE; 2530185029Spjd boolean_t stream_wantsnewfs; 2531185029Spjd uint64_t parent_snapguid = 0; 2532185029Spjd prop_changelist_t *clp = NULL; 2533185029Spjd nvlist_t *snapprops_nvlist = NULL; 2534219089Spjd zprop_errflags_t prop_errflags; 2535219089Spjd boolean_t recursive; 2536185029Spjd 2537185029Spjd begin_time = time(NULL); 2538185029Spjd 2539185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 2540185029Spjd "cannot receive")); 2541185029Spjd 2542219089Spjd recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") == 2543219089Spjd ENOENT); 2544219089Spjd 2545185029Spjd if (stream_avl != NULL) { 2546185029Spjd char *snapname; 2547185029Spjd nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid, 2548185029Spjd &snapname); 2549185029Spjd nvlist_t *props; 2550185029Spjd int ret; 2551185029Spjd 2552185029Spjd (void) nvlist_lookup_uint64(fs, "parentfromsnap", 2553185029Spjd &parent_snapguid); 2554185029Spjd err = nvlist_lookup_nvlist(fs, "props", &props); 2555185029Spjd if (err) 2556185029Spjd VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0)); 2557185029Spjd 2558228103Smm if (flags->canmountoff) { 2559185029Spjd VERIFY(0 == nvlist_add_uint64(props, 2560185029Spjd zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0)); 2561185029Spjd } 2562185029Spjd ret = zcmd_write_src_nvlist(hdl, &zc, props); 2563185029Spjd if (err) 2564185029Spjd nvlist_free(props); 2565185029Spjd 2566185029Spjd if (0 == nvlist_lookup_nvlist(fs, "snapprops", &props)) { 2567185029Spjd VERIFY(0 == nvlist_lookup_nvlist(props, 2568185029Spjd snapname, &snapprops_nvlist)); 2569185029Spjd } 2570185029Spjd 2571185029Spjd if (ret != 0) 2572185029Spjd return (-1); 2573185029Spjd } 2574185029Spjd 2575219089Spjd cp = NULL; 2576219089Spjd 2577185029Spjd /* 2578185029Spjd * Determine how much of the snapshot name stored in the stream 2579185029Spjd * we are going to tack on to the name they specified on the 2580185029Spjd * command line, and how much we are going to chop off. 2581185029Spjd * 2582185029Spjd * If they specified a snapshot, chop the entire name stored in 2583185029Spjd * the stream. 2584185029Spjd */ 2585228103Smm if (flags->istail) { 2586185029Spjd /* 2587219089Spjd * A filesystem was specified with -e. We want to tack on only 2588219089Spjd * the tail of the sent snapshot path. 2589185029Spjd */ 2590185029Spjd if (strchr(tosnap, '@')) { 2591185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " 2592219089Spjd "argument - snapshot not allowed with -e")); 2593219089Spjd return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2594219089Spjd } 2595219089Spjd 2596219089Spjd chopprefix = strrchr(sendfs, '/'); 2597219089Spjd 2598219089Spjd if (chopprefix == NULL) { 2599219089Spjd /* 2600219089Spjd * The tail is the poolname, so we need to 2601219089Spjd * prepend a path separator. 2602219089Spjd */ 2603219089Spjd int len = strlen(drrb->drr_toname); 2604219089Spjd cp = malloc(len + 2); 2605219089Spjd cp[0] = '/'; 2606219089Spjd (void) strcpy(&cp[1], drrb->drr_toname); 2607219089Spjd chopprefix = cp; 2608219089Spjd } else { 2609219089Spjd chopprefix = drrb->drr_toname + (chopprefix - sendfs); 2610219089Spjd } 2611228103Smm } else if (flags->isprefix) { 2612219089Spjd /* 2613219089Spjd * A filesystem was specified with -d. We want to tack on 2614219089Spjd * everything but the first element of the sent snapshot path 2615219089Spjd * (all but the pool name). 2616219089Spjd */ 2617219089Spjd if (strchr(tosnap, '@')) { 2618219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " 2619185029Spjd "argument - snapshot not allowed with -d")); 2620185029Spjd return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2621185029Spjd } 2622219089Spjd 2623219089Spjd chopprefix = strchr(drrb->drr_toname, '/'); 2624219089Spjd if (chopprefix == NULL) 2625219089Spjd chopprefix = strchr(drrb->drr_toname, '@'); 2626185029Spjd } else if (strchr(tosnap, '@') == NULL) { 2627185029Spjd /* 2628219089Spjd * If a filesystem was specified without -d or -e, we want to 2629219089Spjd * tack on everything after the fs specified by 'zfs send'. 2630185029Spjd */ 2631219089Spjd chopprefix = drrb->drr_toname + strlen(sendfs); 2632219089Spjd } else { 2633219089Spjd /* A snapshot was specified as an exact path (no -d or -e). */ 2634219089Spjd if (recursive) { 2635219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2636219089Spjd "cannot specify snapshot name for multi-snapshot " 2637219089Spjd "stream")); 2638219089Spjd return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); 2639219089Spjd } 2640219089Spjd chopprefix = drrb->drr_toname + strlen(drrb->drr_toname); 2641185029Spjd } 2642185029Spjd 2643219089Spjd ASSERT(strstr(drrb->drr_toname, sendfs) == drrb->drr_toname); 2644219089Spjd ASSERT(chopprefix > drrb->drr_toname); 2645219089Spjd ASSERT(chopprefix <= drrb->drr_toname + strlen(drrb->drr_toname)); 2646219089Spjd ASSERT(chopprefix[0] == '/' || chopprefix[0] == '@' || 2647219089Spjd chopprefix[0] == '\0'); 2648219089Spjd 2649185029Spjd /* 2650185029Spjd * Determine name of destination snapshot, store in zc_value. 2651185029Spjd */ 2652219089Spjd (void) strcpy(zc.zc_top_ds, tosnap); 2653185029Spjd (void) strcpy(zc.zc_value, tosnap); 2654219089Spjd (void) strncat(zc.zc_value, chopprefix, sizeof (zc.zc_value)); 2655219089Spjd free(cp); 2656185029Spjd if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT)) { 2657185029Spjd zcmd_free_nvlists(&zc); 2658185029Spjd return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2659185029Spjd } 2660185029Spjd 2661185029Spjd /* 2662185029Spjd * Determine the name of the origin snapshot, store in zc_string. 2663185029Spjd */ 2664185029Spjd if (drrb->drr_flags & DRR_FLAG_CLONE) { 2665228103Smm if (guid_to_name(hdl, zc.zc_value, 2666185029Spjd drrb->drr_fromguid, zc.zc_string) != 0) { 2667185029Spjd zcmd_free_nvlists(&zc); 2668185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2669185029Spjd "local origin for clone %s does not exist"), 2670185029Spjd zc.zc_value); 2671185029Spjd return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2672185029Spjd } 2673228103Smm if (flags->verbose) 2674185029Spjd (void) printf("found clone origin %s\n", zc.zc_string); 2675185029Spjd } 2676185029Spjd 2677185029Spjd stream_wantsnewfs = (drrb->drr_fromguid == 0 || 2678185029Spjd (drrb->drr_flags & DRR_FLAG_CLONE)); 2679185029Spjd 2680185029Spjd if (stream_wantsnewfs) { 2681185029Spjd /* 2682185029Spjd * if the parent fs does not exist, look for it based on 2683185029Spjd * the parent snap GUID 2684185029Spjd */ 2685185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 2686185029Spjd "cannot receive new filesystem stream")); 2687185029Spjd 2688185029Spjd (void) strcpy(zc.zc_name, zc.zc_value); 2689185029Spjd cp = strrchr(zc.zc_name, '/'); 2690185029Spjd if (cp) 2691185029Spjd *cp = '\0'; 2692185029Spjd if (cp && 2693185029Spjd !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { 2694185029Spjd char suffix[ZFS_MAXNAMELEN]; 2695185029Spjd (void) strcpy(suffix, strrchr(zc.zc_value, '/')); 2696228103Smm if (guid_to_name(hdl, zc.zc_name, parent_snapguid, 2697185029Spjd zc.zc_value) == 0) { 2698185029Spjd *strchr(zc.zc_value, '@') = '\0'; 2699185029Spjd (void) strcat(zc.zc_value, suffix); 2700185029Spjd } 2701185029Spjd } 2702185029Spjd } else { 2703185029Spjd /* 2704185029Spjd * if the fs does not exist, look for it based on the 2705185029Spjd * fromsnap GUID 2706185029Spjd */ 2707185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 2708185029Spjd "cannot receive incremental stream")); 2709185029Spjd 2710185029Spjd (void) strcpy(zc.zc_name, zc.zc_value); 2711185029Spjd *strchr(zc.zc_name, '@') = '\0'; 2712185029Spjd 2713219089Spjd /* 2714219089Spjd * If the exact receive path was specified and this is the 2715219089Spjd * topmost path in the stream, then if the fs does not exist we 2716219089Spjd * should look no further. 2717219089Spjd */ 2718228103Smm if ((flags->isprefix || (*(chopprefix = drrb->drr_toname + 2719219089Spjd strlen(sendfs)) != '\0' && *chopprefix != '@')) && 2720219089Spjd !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { 2721185029Spjd char snap[ZFS_MAXNAMELEN]; 2722185029Spjd (void) strcpy(snap, strchr(zc.zc_value, '@')); 2723228103Smm if (guid_to_name(hdl, zc.zc_name, drrb->drr_fromguid, 2724185029Spjd zc.zc_value) == 0) { 2725185029Spjd *strchr(zc.zc_value, '@') = '\0'; 2726185029Spjd (void) strcat(zc.zc_value, snap); 2727185029Spjd } 2728185029Spjd } 2729185029Spjd } 2730185029Spjd 2731185029Spjd (void) strcpy(zc.zc_name, zc.zc_value); 2732185029Spjd *strchr(zc.zc_name, '@') = '\0'; 2733185029Spjd 2734185029Spjd if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { 2735185029Spjd zfs_handle_t *zhp; 2736219089Spjd 2737185029Spjd /* 2738185029Spjd * Destination fs exists. Therefore this should either 2739185029Spjd * be an incremental, or the stream specifies a new fs 2740185029Spjd * (full stream or clone) and they want us to blow it 2741185029Spjd * away (and have therefore specified -F and removed any 2742185029Spjd * snapshots). 2743185029Spjd */ 2744185029Spjd if (stream_wantsnewfs) { 2745228103Smm if (!flags->force) { 2746185029Spjd zcmd_free_nvlists(&zc); 2747185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2748185029Spjd "destination '%s' exists\n" 2749185029Spjd "must specify -F to overwrite it"), 2750185029Spjd zc.zc_name); 2751185029Spjd return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 2752185029Spjd } 2753185029Spjd if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT, 2754185029Spjd &zc) == 0) { 2755185029Spjd zcmd_free_nvlists(&zc); 2756185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2757185029Spjd "destination has snapshots (eg. %s)\n" 2758185029Spjd "must destroy them to overwrite it"), 2759185029Spjd zc.zc_name); 2760185029Spjd return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 2761185029Spjd } 2762185029Spjd } 2763185029Spjd 2764185029Spjd if ((zhp = zfs_open(hdl, zc.zc_name, 2765185029Spjd ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) == NULL) { 2766185029Spjd zcmd_free_nvlists(&zc); 2767185029Spjd return (-1); 2768185029Spjd } 2769185029Spjd 2770185029Spjd if (stream_wantsnewfs && 2771185029Spjd zhp->zfs_dmustats.dds_origin[0]) { 2772185029Spjd zcmd_free_nvlists(&zc); 2773185029Spjd zfs_close(zhp); 2774185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2775185029Spjd "destination '%s' is a clone\n" 2776185029Spjd "must destroy it to overwrite it"), 2777185029Spjd zc.zc_name); 2778185029Spjd return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 2779185029Spjd } 2780185029Spjd 2781228103Smm if (!flags->dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 2782185029Spjd stream_wantsnewfs) { 2783185029Spjd /* We can't do online recv in this case */ 2784185029Spjd clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0); 2785185029Spjd if (clp == NULL) { 2786219089Spjd zfs_close(zhp); 2787185029Spjd zcmd_free_nvlists(&zc); 2788185029Spjd return (-1); 2789185029Spjd } 2790185029Spjd if (changelist_prefix(clp) != 0) { 2791185029Spjd changelist_free(clp); 2792219089Spjd zfs_close(zhp); 2793185029Spjd zcmd_free_nvlists(&zc); 2794185029Spjd return (-1); 2795185029Spjd } 2796185029Spjd } 2797185029Spjd zfs_close(zhp); 2798185029Spjd } else { 2799185029Spjd /* 2800185029Spjd * Destination filesystem does not exist. Therefore we better 2801185029Spjd * be creating a new filesystem (either from a full backup, or 2802185029Spjd * a clone). It would therefore be invalid if the user 2803185029Spjd * specified only the pool name (i.e. if the destination name 2804185029Spjd * contained no slash character). 2805185029Spjd */ 2806185029Spjd if (!stream_wantsnewfs || 2807185029Spjd (cp = strrchr(zc.zc_name, '/')) == NULL) { 2808185029Spjd zcmd_free_nvlists(&zc); 2809185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2810185029Spjd "destination '%s' does not exist"), zc.zc_name); 2811185029Spjd return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2812185029Spjd } 2813185029Spjd 2814185029Spjd /* 2815185029Spjd * Trim off the final dataset component so we perform the 2816185029Spjd * recvbackup ioctl to the filesystems's parent. 2817185029Spjd */ 2818185029Spjd *cp = '\0'; 2819185029Spjd 2820228103Smm if (flags->isprefix && !flags->istail && !flags->dryrun && 2821185029Spjd create_parents(hdl, zc.zc_value, strlen(tosnap)) != 0) { 2822185029Spjd zcmd_free_nvlists(&zc); 2823185029Spjd return (zfs_error(hdl, EZFS_BADRESTORE, errbuf)); 2824185029Spjd } 2825185029Spjd 2826185029Spjd newfs = B_TRUE; 2827185029Spjd } 2828185029Spjd 2829185029Spjd zc.zc_begin_record = drr_noswap->drr_u.drr_begin; 2830185029Spjd zc.zc_cookie = infd; 2831228103Smm zc.zc_guid = flags->force; 2832228103Smm if (flags->verbose) { 2833185029Spjd (void) printf("%s %s stream of %s into %s\n", 2834228103Smm flags->dryrun ? "would receive" : "receiving", 2835185029Spjd drrb->drr_fromguid ? "incremental" : "full", 2836185029Spjd drrb->drr_toname, zc.zc_value); 2837185029Spjd (void) fflush(stdout); 2838185029Spjd } 2839185029Spjd 2840228103Smm if (flags->dryrun) { 2841185029Spjd zcmd_free_nvlists(&zc); 2842228103Smm return (recv_skip(hdl, infd, flags->byteswap)); 2843185029Spjd } 2844185029Spjd 2845219089Spjd zc.zc_nvlist_dst = (uint64_t)(uintptr_t)prop_errbuf; 2846219089Spjd zc.zc_nvlist_dst_size = sizeof (prop_errbuf); 2847219089Spjd zc.zc_cleanup_fd = cleanup_fd; 2848219089Spjd zc.zc_action_handle = *action_handlep; 2849219089Spjd 2850185029Spjd err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc); 2851185029Spjd ioctl_errno = errno; 2852219089Spjd prop_errflags = (zprop_errflags_t)zc.zc_obj; 2853219089Spjd 2854219089Spjd if (err == 0) { 2855219089Spjd nvlist_t *prop_errors; 2856219089Spjd VERIFY(0 == nvlist_unpack((void *)(uintptr_t)zc.zc_nvlist_dst, 2857219089Spjd zc.zc_nvlist_dst_size, &prop_errors, 0)); 2858219089Spjd 2859219089Spjd nvpair_t *prop_err = NULL; 2860219089Spjd 2861219089Spjd while ((prop_err = nvlist_next_nvpair(prop_errors, 2862219089Spjd prop_err)) != NULL) { 2863219089Spjd char tbuf[1024]; 2864219089Spjd zfs_prop_t prop; 2865219089Spjd int intval; 2866219089Spjd 2867219089Spjd prop = zfs_name_to_prop(nvpair_name(prop_err)); 2868219089Spjd (void) nvpair_value_int32(prop_err, &intval); 2869219089Spjd if (strcmp(nvpair_name(prop_err), 2870219089Spjd ZPROP_N_MORE_ERRORS) == 0) { 2871219089Spjd trunc_prop_errs(intval); 2872219089Spjd break; 2873219089Spjd } else { 2874219089Spjd (void) snprintf(tbuf, sizeof (tbuf), 2875219089Spjd dgettext(TEXT_DOMAIN, 2876219089Spjd "cannot receive %s property on %s"), 2877219089Spjd nvpair_name(prop_err), zc.zc_name); 2878219089Spjd zfs_setprop_error(hdl, prop, intval, tbuf); 2879219089Spjd } 2880219089Spjd } 2881219089Spjd nvlist_free(prop_errors); 2882219089Spjd } 2883219089Spjd 2884219089Spjd zc.zc_nvlist_dst = 0; 2885219089Spjd zc.zc_nvlist_dst_size = 0; 2886185029Spjd zcmd_free_nvlists(&zc); 2887185029Spjd 2888185029Spjd if (err == 0 && snapprops_nvlist) { 2889185029Spjd zfs_cmd_t zc2 = { 0 }; 2890185029Spjd 2891185029Spjd (void) strcpy(zc2.zc_name, zc.zc_value); 2892219089Spjd zc2.zc_cookie = B_TRUE; /* received */ 2893185029Spjd if (zcmd_write_src_nvlist(hdl, &zc2, snapprops_nvlist) == 0) { 2894185029Spjd (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc2); 2895185029Spjd zcmd_free_nvlists(&zc2); 2896185029Spjd } 2897185029Spjd } 2898185029Spjd 2899219089Spjd if (err && (ioctl_errno == ENOENT || ioctl_errno == EEXIST)) { 2900185029Spjd /* 2901185029Spjd * It may be that this snapshot already exists, 2902185029Spjd * in which case we want to consume & ignore it 2903185029Spjd * rather than failing. 2904185029Spjd */ 2905185029Spjd avl_tree_t *local_avl; 2906185029Spjd nvlist_t *local_nv, *fs; 2907219089Spjd cp = strchr(zc.zc_value, '@'); 2908185029Spjd 2909185029Spjd /* 2910185029Spjd * XXX Do this faster by just iterating over snaps in 2911185029Spjd * this fs. Also if zc_value does not exist, we will 2912185029Spjd * get a strange "does not exist" error message. 2913185029Spjd */ 2914185029Spjd *cp = '\0'; 2915219089Spjd if (gather_nvlist(hdl, zc.zc_value, NULL, NULL, B_FALSE, 2916185029Spjd &local_nv, &local_avl) == 0) { 2917185029Spjd *cp = '@'; 2918185029Spjd fs = fsavl_find(local_avl, drrb->drr_toguid, NULL); 2919185029Spjd fsavl_destroy(local_avl); 2920185029Spjd nvlist_free(local_nv); 2921185029Spjd 2922185029Spjd if (fs != NULL) { 2923228103Smm if (flags->verbose) { 2924185029Spjd (void) printf("snap %s already exists; " 2925185029Spjd "ignoring\n", zc.zc_value); 2926185029Spjd } 2927219089Spjd err = ioctl_err = recv_skip(hdl, infd, 2928228103Smm flags->byteswap); 2929185029Spjd } 2930185029Spjd } 2931185029Spjd *cp = '@'; 2932185029Spjd } 2933185029Spjd 2934185029Spjd if (ioctl_err != 0) { 2935185029Spjd switch (ioctl_errno) { 2936185029Spjd case ENODEV: 2937185029Spjd cp = strchr(zc.zc_value, '@'); 2938185029Spjd *cp = '\0'; 2939185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2940185029Spjd "most recent snapshot of %s does not\n" 2941185029Spjd "match incremental source"), zc.zc_value); 2942185029Spjd (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); 2943185029Spjd *cp = '@'; 2944185029Spjd break; 2945185029Spjd case ETXTBSY: 2946185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2947185029Spjd "destination %s has been modified\n" 2948185029Spjd "since most recent snapshot"), zc.zc_name); 2949185029Spjd (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); 2950185029Spjd break; 2951185029Spjd case EEXIST: 2952185029Spjd cp = strchr(zc.zc_value, '@'); 2953185029Spjd if (newfs) { 2954185029Spjd /* it's the containing fs that exists */ 2955185029Spjd *cp = '\0'; 2956185029Spjd } 2957185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2958185029Spjd "destination already exists")); 2959185029Spjd (void) zfs_error_fmt(hdl, EZFS_EXISTS, 2960185029Spjd dgettext(TEXT_DOMAIN, "cannot restore to %s"), 2961185029Spjd zc.zc_value); 2962185029Spjd *cp = '@'; 2963185029Spjd break; 2964185029Spjd case EINVAL: 2965185029Spjd (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); 2966185029Spjd break; 2967185029Spjd case ECKSUM: 2968185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2969185029Spjd "invalid stream (checksum mismatch)")); 2970185029Spjd (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); 2971185029Spjd break; 2972219089Spjd case ENOTSUP: 2973219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2974219089Spjd "pool must be upgraded to receive this stream.")); 2975219089Spjd (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 2976219089Spjd break; 2977219089Spjd case EDQUOT: 2978219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2979219089Spjd "destination %s space quota exceeded"), zc.zc_name); 2980228103Smm (void) zfs_error(hdl, EZFS_NOSPC, errbuf); 2981219089Spjd break; 2982185029Spjd default: 2983185029Spjd (void) zfs_standard_error(hdl, ioctl_errno, errbuf); 2984185029Spjd } 2985185029Spjd } 2986185029Spjd 2987185029Spjd /* 2988219089Spjd * Mount the target filesystem (if created). Also mount any 2989219089Spjd * children of the target filesystem if we did a replication 2990219089Spjd * receive (indicated by stream_avl being non-NULL). 2991185029Spjd */ 2992185029Spjd cp = strchr(zc.zc_value, '@'); 2993185029Spjd if (cp && (ioctl_err == 0 || !newfs)) { 2994185029Spjd zfs_handle_t *h; 2995185029Spjd 2996185029Spjd *cp = '\0'; 2997185029Spjd h = zfs_open(hdl, zc.zc_value, 2998185029Spjd ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); 2999185029Spjd if (h != NULL) { 3000185029Spjd if (h->zfs_type == ZFS_TYPE_VOLUME) { 3001185029Spjd *cp = '@'; 3002219089Spjd } else if (newfs || stream_avl) { 3003185029Spjd /* 3004185029Spjd * Track the first/top of hierarchy fs, 3005185029Spjd * for mounting and sharing later. 3006185029Spjd */ 3007185029Spjd if (top_zfs && *top_zfs == NULL) 3008185029Spjd *top_zfs = zfs_strdup(hdl, zc.zc_value); 3009185029Spjd } 3010185029Spjd zfs_close(h); 3011185029Spjd } 3012185029Spjd *cp = '@'; 3013185029Spjd } 3014185029Spjd 3015185029Spjd if (clp) { 3016185029Spjd err |= changelist_postfix(clp); 3017185029Spjd changelist_free(clp); 3018185029Spjd } 3019185029Spjd 3020219089Spjd if (prop_errflags & ZPROP_ERR_NOCLEAR) { 3021219089Spjd (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: " 3022219089Spjd "failed to clear unreceived properties on %s"), 3023219089Spjd zc.zc_name); 3024219089Spjd (void) fprintf(stderr, "\n"); 3025219089Spjd } 3026219089Spjd if (prop_errflags & ZPROP_ERR_NORESTORE) { 3027219089Spjd (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: " 3028219089Spjd "failed to restore original properties on %s"), 3029219089Spjd zc.zc_name); 3030219089Spjd (void) fprintf(stderr, "\n"); 3031219089Spjd } 3032219089Spjd 3033185029Spjd if (err || ioctl_err) 3034185029Spjd return (-1); 3035185029Spjd 3036219089Spjd *action_handlep = zc.zc_action_handle; 3037219089Spjd 3038228103Smm if (flags->verbose) { 3039185029Spjd char buf1[64]; 3040185029Spjd char buf2[64]; 3041185029Spjd uint64_t bytes = zc.zc_cookie; 3042185029Spjd time_t delta = time(NULL) - begin_time; 3043185029Spjd if (delta == 0) 3044185029Spjd delta = 1; 3045185029Spjd zfs_nicenum(bytes, buf1, sizeof (buf1)); 3046185029Spjd zfs_nicenum(bytes/delta, buf2, sizeof (buf1)); 3047185029Spjd 3048185029Spjd (void) printf("received %sB stream in %lu seconds (%sB/sec)\n", 3049185029Spjd buf1, delta, buf2); 3050185029Spjd } 3051185029Spjd 3052185029Spjd return (0); 3053185029Spjd} 3054185029Spjd 3055185029Spjdstatic int 3056228103Smmzfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap, recvflags_t *flags, 3057219089Spjd int infd, const char *sendfs, nvlist_t *stream_nv, avl_tree_t *stream_avl, 3058219089Spjd char **top_zfs, int cleanup_fd, uint64_t *action_handlep) 3059185029Spjd{ 3060185029Spjd int err; 3061185029Spjd dmu_replay_record_t drr, drr_noswap; 3062185029Spjd struct drr_begin *drrb = &drr.drr_u.drr_begin; 3063185029Spjd char errbuf[1024]; 3064185029Spjd zio_cksum_t zcksum = { 0 }; 3065219089Spjd uint64_t featureflags; 3066219089Spjd int hdrtype; 3067185029Spjd 3068185029Spjd (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3069185029Spjd "cannot receive")); 3070185029Spjd 3071228103Smm if (flags->isprefix && 3072185029Spjd !zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) { 3073185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs " 3074185029Spjd "(%s) does not exist"), tosnap); 3075185029Spjd return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3076185029Spjd } 3077185029Spjd 3078185029Spjd /* read in the BEGIN record */ 3079185029Spjd if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE, 3080185029Spjd &zcksum))) 3081185029Spjd return (err); 3082185029Spjd 3083185029Spjd if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) { 3084185029Spjd /* It's the double end record at the end of a package */ 3085185029Spjd return (ENODATA); 3086185029Spjd } 3087185029Spjd 3088185029Spjd /* the kernel needs the non-byteswapped begin record */ 3089185029Spjd drr_noswap = drr; 3090185029Spjd 3091228103Smm flags->byteswap = B_FALSE; 3092185029Spjd if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { 3093185029Spjd /* 3094185029Spjd * We computed the checksum in the wrong byteorder in 3095185029Spjd * recv_read() above; do it again correctly. 3096185029Spjd */ 3097185029Spjd bzero(&zcksum, sizeof (zio_cksum_t)); 3098185029Spjd fletcher_4_incremental_byteswap(&drr, sizeof (drr), &zcksum); 3099228103Smm flags->byteswap = B_TRUE; 3100185029Spjd 3101185029Spjd drr.drr_type = BSWAP_32(drr.drr_type); 3102185029Spjd drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen); 3103185029Spjd drrb->drr_magic = BSWAP_64(drrb->drr_magic); 3104219089Spjd drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); 3105185029Spjd drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); 3106185029Spjd drrb->drr_type = BSWAP_32(drrb->drr_type); 3107185029Spjd drrb->drr_flags = BSWAP_32(drrb->drr_flags); 3108185029Spjd drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); 3109185029Spjd drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); 3110185029Spjd } 3111185029Spjd 3112185029Spjd if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) { 3113185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " 3114185029Spjd "stream (bad magic number)")); 3115185029Spjd return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); 3116185029Spjd } 3117185029Spjd 3118219089Spjd featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); 3119219089Spjd hdrtype = DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo); 3120219089Spjd 3121219089Spjd if (!DMU_STREAM_SUPPORTED(featureflags) || 3122219089Spjd (hdrtype != DMU_SUBSTREAM && hdrtype != DMU_COMPOUNDSTREAM)) { 3123219089Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3124219089Spjd "stream has unsupported feature, feature flags = %lx"), 3125219089Spjd featureflags); 3126219089Spjd return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); 3127219089Spjd } 3128219089Spjd 3129185029Spjd if (strchr(drrb->drr_toname, '@') == NULL) { 3130185029Spjd zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " 3131185029Spjd "stream (bad snapshot name)")); 3132185029Spjd return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); 3133185029Spjd } 3134185029Spjd 3135219089Spjd if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == DMU_SUBSTREAM) { 3136219089Spjd char nonpackage_sendfs[ZFS_MAXNAMELEN]; 3137219089Spjd if (sendfs == NULL) { 3138219089Spjd /* 3139219089Spjd * We were not called from zfs_receive_package(). Get 3140219089Spjd * the fs specified by 'zfs send'. 3141219089Spjd */ 3142219089Spjd char *cp; 3143219089Spjd (void) strlcpy(nonpackage_sendfs, 3144219089Spjd drr.drr_u.drr_begin.drr_toname, ZFS_MAXNAMELEN); 3145219089Spjd if ((cp = strchr(nonpackage_sendfs, '@')) != NULL) 3146219089Spjd *cp = '\0'; 3147219089Spjd sendfs = nonpackage_sendfs; 3148219089Spjd } 3149185029Spjd return (zfs_receive_one(hdl, infd, tosnap, flags, 3150219089Spjd &drr, &drr_noswap, sendfs, stream_nv, stream_avl, 3151219089Spjd top_zfs, cleanup_fd, action_handlep)); 3152219089Spjd } else { 3153219089Spjd assert(DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == 3154219089Spjd DMU_COMPOUNDSTREAM); 3155185029Spjd return (zfs_receive_package(hdl, infd, tosnap, flags, 3156219089Spjd &drr, &zcksum, top_zfs, cleanup_fd, action_handlep)); 3157185029Spjd } 3158185029Spjd} 3159185029Spjd 3160185029Spjd/* 3161185029Spjd * Restores a backup of tosnap from the file descriptor specified by infd. 3162185029Spjd * Return 0 on total success, -2 if some things couldn't be 3163185029Spjd * destroyed/renamed/promoted, -1 if some things couldn't be received. 3164185029Spjd * (-1 will override -2). 3165185029Spjd */ 3166185029Spjdint 3167228103Smmzfs_receive(libzfs_handle_t *hdl, const char *tosnap, recvflags_t *flags, 3168185029Spjd int infd, avl_tree_t *stream_avl) 3169185029Spjd{ 3170185029Spjd char *top_zfs = NULL; 3171185029Spjd int err; 3172219089Spjd int cleanup_fd; 3173219089Spjd uint64_t action_handle = 0; 3174185029Spjd 3175219089Spjd cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL); 3176219089Spjd VERIFY(cleanup_fd >= 0); 3177185029Spjd 3178219089Spjd err = zfs_receive_impl(hdl, tosnap, flags, infd, NULL, NULL, 3179219089Spjd stream_avl, &top_zfs, cleanup_fd, &action_handle); 3180219089Spjd 3181219089Spjd VERIFY(0 == close(cleanup_fd)); 3182219089Spjd 3183228103Smm if (err == 0 && !flags->nomount && top_zfs) { 3184185029Spjd zfs_handle_t *zhp; 3185185029Spjd prop_changelist_t *clp; 3186185029Spjd 3187185029Spjd zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM); 3188185029Spjd if (zhp != NULL) { 3189185029Spjd clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, 3190185029Spjd CL_GATHER_MOUNT_ALWAYS, 0); 3191185029Spjd zfs_close(zhp); 3192185029Spjd if (clp != NULL) { 3193185029Spjd /* mount and share received datasets */ 3194185029Spjd err = changelist_postfix(clp); 3195185029Spjd changelist_free(clp); 3196185029Spjd } 3197185029Spjd } 3198185029Spjd if (zhp == NULL || clp == NULL || err) 3199185029Spjd err = -1; 3200185029Spjd } 3201185029Spjd if (top_zfs) 3202185029Spjd free(top_zfs); 3203185029Spjd 3204185029Spjd return (err); 3205185029Spjd} 3206