4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012 by Delphix. All rights reserved.
25 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
27 * All rights reserved.
28 * Copyright (c) 2013 Steven Hartland. All rights reserved.
41 #include <sys/param.h>
42 #include <sys/mount.h>
49 #include "zfs_namecheck.h"
51 #include "zfs_fletcher.h"
52 #include "libzfs_impl.h"
54 #include <sys/zio_checksum.h>
58 extern int zfs_ioctl_version;
61 /* in libzfs_dataset.c */
62 extern void zfs_setprop_error(libzfs_handle_t *, zfs_prop_t, int, char *);
63 /* We need to use something for ENODATA. */
66 static int zfs_receive_impl(libzfs_handle_t *, const char *, recvflags_t *,
67 int, const char *, nvlist_t *, avl_tree_t *, char **, int, uint64_t *);
69 static const zio_cksum_t zero_cksum = { 0 };
71 typedef struct dedup_arg {
74 libzfs_handle_t *dedup_hdl;
77 typedef struct progress_arg {
80 boolean_t pa_parsable;
83 typedef struct dataref {
89 typedef struct dedup_entry {
90 struct dedup_entry *dde_next;
91 zio_cksum_t dde_chksum;
96 #define MAX_DDT_PHYSMEM_PERCENT 20
97 #define SMALLEST_POSSIBLE_MAX_DDT_MB 128
99 typedef struct dedup_table {
100 dedup_entry_t **dedup_hash_array;
101 umem_cache_t *ddecache;
102 uint64_t max_ddt_size; /* max dedup table size in bytes */
103 uint64_t cur_ddt_size; /* current dedup table size in bytes */
110 high_order_bit(uint64_t n)
114 for (count = 0; n != 0; count++)
120 ssread(void *buf, size_t len, FILE *stream)
124 if ((outlen = fread(buf, len, 1, stream)) == 0)
131 ddt_hash_append(libzfs_handle_t *hdl, dedup_table_t *ddt, dedup_entry_t **ddepp,
132 zio_cksum_t *cs, uint64_t prop, dataref_t *dr)
136 if (ddt->cur_ddt_size >= ddt->max_ddt_size) {
137 if (ddt->ddt_full == B_FALSE) {
138 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
139 "Dedup table full. Deduplication will continue "
140 "with existing table entries"));
141 ddt->ddt_full = B_TRUE;
146 if ((dde = umem_cache_alloc(ddt->ddecache, UMEM_DEFAULT))
148 assert(*ddepp == NULL);
149 dde->dde_next = NULL;
150 dde->dde_chksum = *cs;
151 dde->dde_prop = prop;
154 ddt->cur_ddt_size += sizeof (dedup_entry_t);
160 * Using the specified dedup table, do a lookup for an entry with
161 * the checksum cs. If found, return the block's reference info
162 * in *dr. Otherwise, insert a new entry in the dedup table, using
163 * the reference information specified by *dr.
165 * return value: true - entry was found
166 * false - entry was not found
169 ddt_update(libzfs_handle_t *hdl, dedup_table_t *ddt, zio_cksum_t *cs,
170 uint64_t prop, dataref_t *dr)
173 dedup_entry_t **ddepp;
175 hashcode = BF64_GET(cs->zc_word[0], 0, ddt->numhashbits);
177 for (ddepp = &(ddt->dedup_hash_array[hashcode]); *ddepp != NULL;
178 ddepp = &((*ddepp)->dde_next)) {
179 if (ZIO_CHECKSUM_EQUAL(((*ddepp)->dde_chksum), *cs) &&
180 (*ddepp)->dde_prop == prop) {
181 *dr = (*ddepp)->dde_ref;
185 ddt_hash_append(hdl, ddt, ddepp, cs, prop, dr);
190 cksum_and_write(const void *buf, uint64_t len, zio_cksum_t *zc, int outfd)
192 fletcher_4_incremental_native(buf, len, zc);
193 return (write(outfd, buf, len));
197 * This function is started in a separate thread when the dedup option
198 * has been requested. The main send thread determines the list of
199 * snapshots to be included in the send stream and makes the ioctl calls
200 * for each one. But instead of having the ioctl send the output to the
201 * the output fd specified by the caller of zfs_send()), the
202 * ioctl is told to direct the output to a pipe, which is read by the
203 * alternate thread running THIS function. This function does the
205 * 1. building a dedup table (the DDT)
206 * 2. doing checksums on each data block and inserting a record in the DDT
207 * 3. looking for matching checksums, and
208 * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever
209 * a duplicate block is found.
210 * The output of this function then goes to the output fd requested
211 * by the caller of zfs_send().
216 dedup_arg_t *dda = arg;
217 char *buf = malloc(1<<20);
218 dmu_replay_record_t thedrr;
219 dmu_replay_record_t *drr = &thedrr;
220 struct drr_begin *drrb = &thedrr.drr_u.drr_begin;
221 struct drr_end *drre = &thedrr.drr_u.drr_end;
222 struct drr_object *drro = &thedrr.drr_u.drr_object;
223 struct drr_write *drrw = &thedrr.drr_u.drr_write;
224 struct drr_spill *drrs = &thedrr.drr_u.drr_spill;
227 dmu_replay_record_t wbr_drr = {0};
228 struct drr_write_byref *wbr_drrr = &wbr_drr.drr_u.drr_write_byref;
230 zio_cksum_t stream_cksum;
231 uint64_t physmem = sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE);
235 MAX((physmem * MAX_DDT_PHYSMEM_PERCENT)/100,
236 SMALLEST_POSSIBLE_MAX_DDT_MB<<20);
238 numbuckets = ddt.max_ddt_size/(sizeof (dedup_entry_t));
241 * numbuckets must be a power of 2. Increase number to
242 * a power of 2 if necessary.
244 if (!ISP2(numbuckets))
245 numbuckets = 1 << high_order_bit(numbuckets);
247 ddt.dedup_hash_array = calloc(numbuckets, sizeof (dedup_entry_t *));
248 ddt.ddecache = umem_cache_create("dde", sizeof (dedup_entry_t), 0,
249 NULL, NULL, NULL, NULL, NULL, 0);
250 ddt.cur_ddt_size = numbuckets * sizeof (dedup_entry_t *);
251 ddt.numhashbits = high_order_bit(numbuckets) - 1;
252 ddt.ddt_full = B_FALSE;
254 /* Initialize the write-by-reference block. */
255 wbr_drr.drr_type = DRR_WRITE_BYREF;
256 wbr_drr.drr_payloadlen = 0;
258 outfd = dda->outputfd;
259 ofp = fdopen(dda->inputfd, "r");
260 while (ssread(drr, sizeof (dmu_replay_record_t), ofp) != 0) {
262 switch (drr->drr_type) {
266 ZIO_SET_CHECKSUM(&stream_cksum, 0, 0, 0, 0);
268 /* set the DEDUP feature flag for this stream */
269 fflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
270 fflags |= (DMU_BACKUP_FEATURE_DEDUP |
271 DMU_BACKUP_FEATURE_DEDUPPROPS);
272 DMU_SET_FEATUREFLAGS(drrb->drr_versioninfo, fflags);
274 if (cksum_and_write(drr, sizeof (dmu_replay_record_t),
275 &stream_cksum, outfd) == -1)
277 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
278 DMU_COMPOUNDSTREAM && drr->drr_payloadlen != 0) {
279 int sz = drr->drr_payloadlen;
285 (void) ssread(buf, sz, ofp);
288 if (cksum_and_write(buf, sz, &stream_cksum,
297 /* use the recalculated checksum */
298 ZIO_SET_CHECKSUM(&drre->drr_checksum,
299 stream_cksum.zc_word[0], stream_cksum.zc_word[1],
300 stream_cksum.zc_word[2], stream_cksum.zc_word[3]);
301 if ((write(outfd, drr,
302 sizeof (dmu_replay_record_t))) == -1)
309 if (cksum_and_write(drr, sizeof (dmu_replay_record_t),
310 &stream_cksum, outfd) == -1)
312 if (drro->drr_bonuslen > 0) {
314 P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8),
316 if (cksum_and_write(buf,
317 P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8),
318 &stream_cksum, outfd) == -1)
326 if (cksum_and_write(drr, sizeof (dmu_replay_record_t),
327 &stream_cksum, outfd) == -1)
329 (void) ssread(buf, drrs->drr_length, ofp);
330 if (cksum_and_write(buf, drrs->drr_length,
331 &stream_cksum, outfd) == -1)
336 case DRR_FREEOBJECTS:
338 if (cksum_and_write(drr, sizeof (dmu_replay_record_t),
339 &stream_cksum, outfd) == -1)
348 (void) ssread(buf, drrw->drr_length, ofp);
351 * Use the existing checksum if it's dedup-capable,
352 * else calculate a SHA256 checksum for it.
355 if (ZIO_CHECKSUM_EQUAL(drrw->drr_key.ddk_cksum,
357 !DRR_IS_DEDUP_CAPABLE(drrw->drr_checksumflags)) {
359 zio_cksum_t tmpsha256;
362 SHA256Update(&ctx, buf, drrw->drr_length);
363 SHA256Final(&tmpsha256, &ctx);
364 drrw->drr_key.ddk_cksum.zc_word[0] =
365 BE_64(tmpsha256.zc_word[0]);
366 drrw->drr_key.ddk_cksum.zc_word[1] =
367 BE_64(tmpsha256.zc_word[1]);
368 drrw->drr_key.ddk_cksum.zc_word[2] =
369 BE_64(tmpsha256.zc_word[2]);
370 drrw->drr_key.ddk_cksum.zc_word[3] =
371 BE_64(tmpsha256.zc_word[3]);
372 drrw->drr_checksumtype = ZIO_CHECKSUM_SHA256;
373 drrw->drr_checksumflags = DRR_CHECKSUM_DEDUP;
376 dataref.ref_guid = drrw->drr_toguid;
377 dataref.ref_object = drrw->drr_object;
378 dataref.ref_offset = drrw->drr_offset;
380 if (ddt_update(dda->dedup_hdl, &ddt,
381 &drrw->drr_key.ddk_cksum, drrw->drr_key.ddk_prop,
383 /* block already present in stream */
384 wbr_drrr->drr_object = drrw->drr_object;
385 wbr_drrr->drr_offset = drrw->drr_offset;
386 wbr_drrr->drr_length = drrw->drr_length;
387 wbr_drrr->drr_toguid = drrw->drr_toguid;
388 wbr_drrr->drr_refguid = dataref.ref_guid;
389 wbr_drrr->drr_refobject =
391 wbr_drrr->drr_refoffset =
394 wbr_drrr->drr_checksumtype =
395 drrw->drr_checksumtype;
396 wbr_drrr->drr_checksumflags =
397 drrw->drr_checksumtype;
398 wbr_drrr->drr_key.ddk_cksum =
399 drrw->drr_key.ddk_cksum;
400 wbr_drrr->drr_key.ddk_prop =
401 drrw->drr_key.ddk_prop;
403 if (cksum_and_write(&wbr_drr,
404 sizeof (dmu_replay_record_t), &stream_cksum,
408 /* block not previously seen */
409 if (cksum_and_write(drr,
410 sizeof (dmu_replay_record_t), &stream_cksum,
413 if (cksum_and_write(buf,
415 &stream_cksum, outfd) == -1)
423 if (cksum_and_write(drr, sizeof (dmu_replay_record_t),
424 &stream_cksum, outfd) == -1)
430 (void) printf("INVALID record type 0x%x\n",
432 /* should never happen, so assert */
437 umem_cache_destroy(ddt.ddecache);
438 free(ddt.dedup_hash_array);
446 * Routines for dealing with the AVL tree of fs-nvlists
448 typedef struct fsavl_node {
456 fsavl_compare(const void *arg1, const void *arg2)
458 const fsavl_node_t *fn1 = arg1;
459 const fsavl_node_t *fn2 = arg2;
461 if (fn1->fn_guid > fn2->fn_guid)
463 else if (fn1->fn_guid < fn2->fn_guid)
470 * Given the GUID of a snapshot, find its containing filesystem and
474 fsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname)
476 fsavl_node_t fn_find;
479 fn_find.fn_guid = snapguid;
481 fn = avl_find(avl, &fn_find, NULL);
484 *snapname = fn->fn_snapname;
485 return (fn->fn_nvfs);
491 fsavl_destroy(avl_tree_t *avl)
500 while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL)
507 * Given an nvlist, produce an avl tree of snapshots, ordered by guid
510 fsavl_create(nvlist_t *fss)
513 nvpair_t *fselem = NULL;
515 if ((fsavl = malloc(sizeof (avl_tree_t))) == NULL)
518 avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t),
519 offsetof(fsavl_node_t, fn_node));
521 while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) {
522 nvlist_t *nvfs, *snaps;
523 nvpair_t *snapelem = NULL;
525 VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs));
526 VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps));
529 nvlist_next_nvpair(snaps, snapelem)) != NULL) {
533 VERIFY(0 == nvpair_value_uint64(snapelem, &guid));
534 if ((fn = malloc(sizeof (fsavl_node_t))) == NULL) {
535 fsavl_destroy(fsavl);
539 fn->fn_snapname = nvpair_name(snapelem);
543 * Note: if there are multiple snaps with the
544 * same GUID, we ignore all but one.
546 if (avl_find(fsavl, fn, NULL) == NULL)
557 * Routines for dealing with the giant nvlist of fs-nvlists, etc.
559 typedef struct send_data {
560 uint64_t parent_fromsnap_guid;
561 nvlist_t *parent_snaps;
564 const char *fromsnap;
569 * The header nvlist is of the following format:
572 * "fromsnap" -> string (if incremental)
576 * "name" -> string (full name; for debugging)
577 * "parentfromsnap" -> number (guid of fromsnap in parent)
579 * "props" -> { name -> value (only if set here) }
580 * "snaps" -> { name (lastname) -> number (guid) }
581 * "snapprops" -> { name (lastname) -> { name -> value } }
583 * "origin" -> number (guid) (if clone)
584 * "sent" -> boolean (not on-disk)
592 static void send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv);
595 send_iterate_snap(zfs_handle_t *zhp, void *arg)
597 send_data_t *sd = arg;
598 uint64_t guid = zhp->zfs_dmustats.dds_guid;
602 snapname = strrchr(zhp->zfs_name, '@')+1;
604 VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid));
606 * NB: if there is no fromsnap here (it's a newly created fs in
607 * an incremental replication), we will substitute the tosnap.
609 if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) ||
610 (sd->parent_fromsnap_guid == 0 && sd->tosnap &&
611 strcmp(snapname, sd->tosnap) == 0)) {
612 sd->parent_fromsnap_guid = guid;
615 VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0));
616 send_iterate_prop(zhp, nv);
617 VERIFY(0 == nvlist_add_nvlist(sd->snapprops, snapname, nv));
625 send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv)
627 nvpair_t *elem = NULL;
629 while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) {
630 char *propname = nvpair_name(elem);
631 zfs_prop_t prop = zfs_name_to_prop(propname);
634 if (!zfs_prop_user(propname)) {
636 * Realistically, this should never happen. However,
637 * we want the ability to add DSL properties without
638 * needing to make incompatible version changes. We
639 * need to ignore unknown properties to allow older
640 * software to still send datasets containing these
641 * properties, with the unknown properties elided.
643 if (prop == ZPROP_INVAL)
646 if (zfs_prop_readonly(prop))
650 verify(nvpair_value_nvlist(elem, &propnv) == 0);
651 if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION ||
652 prop == ZFS_PROP_REFQUOTA ||
653 prop == ZFS_PROP_REFRESERVATION) {
656 verify(nvlist_lookup_uint64(propnv,
657 ZPROP_VALUE, &value) == 0);
658 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT)
661 * May have no source before SPA_VERSION_RECVD_PROPS,
662 * but is still modifiable.
664 if (nvlist_lookup_string(propnv,
665 ZPROP_SOURCE, &source) == 0) {
666 if ((strcmp(source, zhp->zfs_name) != 0) &&
668 ZPROP_SOURCE_VAL_RECVD) != 0))
673 if (nvlist_lookup_string(propnv,
674 ZPROP_SOURCE, &source) != 0)
676 if ((strcmp(source, zhp->zfs_name) != 0) &&
677 (strcmp(source, ZPROP_SOURCE_VAL_RECVD) != 0))
681 if (zfs_prop_user(propname) ||
682 zfs_prop_get_type(prop) == PROP_TYPE_STRING) {
684 verify(nvlist_lookup_string(propnv,
685 ZPROP_VALUE, &value) == 0);
686 VERIFY(0 == nvlist_add_string(nv, propname, value));
689 verify(nvlist_lookup_uint64(propnv,
690 ZPROP_VALUE, &value) == 0);
691 VERIFY(0 == nvlist_add_uint64(nv, propname, value));
697 * recursively generate nvlists describing datasets. See comment
698 * for the data structure send_data_t above for description of contents
702 send_iterate_fs(zfs_handle_t *zhp, void *arg)
704 send_data_t *sd = arg;
707 uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid;
708 uint64_t guid = zhp->zfs_dmustats.dds_guid;
711 VERIFY(0 == nvlist_alloc(&nvfs, NV_UNIQUE_NAME, 0));
712 VERIFY(0 == nvlist_add_string(nvfs, "name", zhp->zfs_name));
713 VERIFY(0 == nvlist_add_uint64(nvfs, "parentfromsnap",
714 sd->parent_fromsnap_guid));
716 if (zhp->zfs_dmustats.dds_origin[0]) {
717 zfs_handle_t *origin = zfs_open(zhp->zfs_hdl,
718 zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
721 VERIFY(0 == nvlist_add_uint64(nvfs, "origin",
722 origin->zfs_dmustats.dds_guid));
725 /* iterate over props */
726 VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0));
727 send_iterate_prop(zhp, nv);
728 VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv));
731 /* iterate over snaps, and set sd->parent_fromsnap_guid */
732 sd->parent_fromsnap_guid = 0;
733 VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0));
734 VERIFY(0 == nvlist_alloc(&sd->snapprops, NV_UNIQUE_NAME, 0));
735 (void) zfs_iter_snapshots_sorted(zhp, send_iterate_snap, sd);
736 VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps));
737 VERIFY(0 == nvlist_add_nvlist(nvfs, "snapprops", sd->snapprops));
738 nvlist_free(sd->parent_snaps);
739 nvlist_free(sd->snapprops);
741 /* add this fs to nvlist */
742 (void) snprintf(guidstring, sizeof (guidstring),
743 "0x%llx", (longlong_t)guid);
744 VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs));
747 /* iterate over children */
749 rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd);
751 sd->parent_fromsnap_guid = parent_fromsnap_guid_save;
758 gather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap,
759 const char *tosnap, boolean_t recursive, nvlist_t **nvlp, avl_tree_t **avlp)
762 send_data_t sd = { 0 };
765 zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
767 return (EZFS_BADTYPE);
769 VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0));
770 sd.fromsnap = fromsnap;
772 sd.recursive = recursive;
774 if ((error = send_iterate_fs(zhp, &sd)) != 0) {
782 if (avlp != NULL && (*avlp = fsavl_create(sd.fss)) == NULL) {
793 * Routines specific to "zfs send"
795 typedef struct send_dump_data {
796 /* these are all just the short snapname (the part after the @) */
797 const char *fromsnap;
799 char prevsnap[ZFS_MAXNAMELEN];
800 uint64_t prevsnap_obj;
801 boolean_t seenfrom, seento, replicate, doall, fromorigin;
802 boolean_t verbose, dryrun, parsable, progress;
808 snapfilter_cb_t *filter_cb;
811 char holdtag[ZFS_MAXNAMELEN];
817 estimate_ioctl(zfs_handle_t *zhp, uint64_t fromsnap_obj,
818 boolean_t fromorigin, uint64_t *sizep)
820 zfs_cmd_t zc = { 0 };
821 libzfs_handle_t *hdl = zhp->zfs_hdl;
823 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
824 assert(fromsnap_obj == 0 || !fromorigin);
826 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
827 zc.zc_obj = fromorigin;
828 zc.zc_sendobj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
829 zc.zc_fromobj = fromsnap_obj;
830 zc.zc_guid = 1; /* estimate flag */
832 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SEND, &zc) != 0) {
834 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
835 "warning: cannot estimate space for '%s'"), zhp->zfs_name);
839 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
840 "not an earlier snapshot from the same fs"));
841 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
844 if (zfs_dataset_exists(hdl, zc.zc_name,
845 ZFS_TYPE_SNAPSHOT)) {
846 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
847 "incremental source (@%s) does not exist"),
850 return (zfs_error(hdl, EZFS_NOENT, errbuf));
862 zfs_error_aux(hdl, strerror(errno));
863 return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
866 return (zfs_standard_error(hdl, errno, errbuf));
870 *sizep = zc.zc_objset_type;
876 * Dumps a backup of the given snapshot (incremental from fromsnap if it's not
877 * NULL) to the file descriptor specified by outfd.
880 dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, uint64_t fromsnap_obj,
881 boolean_t fromorigin, int outfd, nvlist_t *debugnv)
883 zfs_cmd_t zc = { 0 };
884 libzfs_handle_t *hdl = zhp->zfs_hdl;
887 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
888 assert(fromsnap_obj == 0 || !fromorigin);
890 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
891 zc.zc_cookie = outfd;
892 zc.zc_obj = fromorigin;
893 zc.zc_sendobj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
894 zc.zc_fromobj = fromsnap_obj;
896 VERIFY(0 == nvlist_alloc(&thisdbg, NV_UNIQUE_NAME, 0));
897 if (fromsnap && fromsnap[0] != '\0') {
898 VERIFY(0 == nvlist_add_string(thisdbg,
899 "fromsnap", fromsnap));
902 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SEND, &zc) != 0) {
904 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
905 "warning: cannot send '%s'"), zhp->zfs_name);
907 VERIFY(0 == nvlist_add_uint64(thisdbg, "error", errno));
909 VERIFY(0 == nvlist_add_nvlist(debugnv,
910 zhp->zfs_name, thisdbg));
912 nvlist_free(thisdbg);
916 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
917 "not an earlier snapshot from the same fs"));
918 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
921 if (zfs_dataset_exists(hdl, zc.zc_name,
922 ZFS_TYPE_SNAPSHOT)) {
923 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
924 "incremental source (@%s) does not exist"),
927 return (zfs_error(hdl, EZFS_NOENT, errbuf));
942 zfs_error_aux(hdl, strerror(errno));
943 return (zfs_error(hdl, EZFS_BADBACKUP, errbuf));
946 return (zfs_standard_error(hdl, errno, errbuf));
951 VERIFY(0 == nvlist_add_nvlist(debugnv, zhp->zfs_name, thisdbg));
952 nvlist_free(thisdbg);
958 gather_holds(zfs_handle_t *zhp, send_dump_data_t *sdd)
960 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
963 * zfs_send() only sets snapholds for sends that need them,
964 * e.g. replication and doall.
966 if (sdd->snapholds == NULL)
969 fnvlist_add_string(sdd->snapholds, zhp->zfs_name, sdd->holdtag);
973 send_progress_thread(void *arg)
975 progress_arg_t *pa = arg;
977 zfs_cmd_t zc = { 0 };
978 zfs_handle_t *zhp = pa->pa_zhp;
979 libzfs_handle_t *hdl = zhp->zfs_hdl;
980 unsigned long long bytes;
986 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
987 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
989 if (!pa->pa_parsable)
990 (void) fprintf(stderr, "TIME SENT SNAPSHOT\n");
993 * Print the progress from ZFS_IOC_SEND_PROGRESS every second.
998 zc.zc_cookie = pa->pa_fd;
999 if (zfs_ioctl(hdl, ZFS_IOC_SEND_PROGRESS, &zc) != 0)
1000 return ((void *)-1);
1004 bytes = zc.zc_cookie;
1006 if (pa->pa_parsable) {
1007 (void) fprintf(stderr, "%02d:%02d:%02d\t%llu\t%s\n",
1008 tm->tm_hour, tm->tm_min, tm->tm_sec,
1009 bytes, zhp->zfs_name);
1011 zfs_nicenum(bytes, buf, sizeof (buf));
1012 (void) fprintf(stderr, "%02d:%02d:%02d %5s %s\n",
1013 tm->tm_hour, tm->tm_min, tm->tm_sec,
1014 buf, zhp->zfs_name);
1020 dump_snapshot(zfs_handle_t *zhp, void *arg)
1022 send_dump_data_t *sdd = arg;
1023 progress_arg_t pa = { 0 };
1027 boolean_t isfromsnap, istosnap, fromorigin;
1028 boolean_t exclude = B_FALSE;
1031 thissnap = strchr(zhp->zfs_name, '@') + 1;
1032 isfromsnap = (sdd->fromsnap != NULL &&
1033 strcmp(sdd->fromsnap, thissnap) == 0);
1035 if (!sdd->seenfrom && isfromsnap) {
1036 gather_holds(zhp, sdd);
1037 sdd->seenfrom = B_TRUE;
1038 (void) strcpy(sdd->prevsnap, thissnap);
1039 sdd->prevsnap_obj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
1044 if (sdd->seento || !sdd->seenfrom) {
1049 istosnap = (strcmp(sdd->tosnap, thissnap) == 0);
1051 sdd->seento = B_TRUE;
1053 if (!sdd->doall && !isfromsnap && !istosnap) {
1054 if (sdd->replicate) {
1056 nvlist_t *snapprops;
1058 * Filter out all intermediate snapshots except origin
1059 * snapshots needed to replicate clones.
1061 nvlist_t *nvfs = fsavl_find(sdd->fsavl,
1062 zhp->zfs_dmustats.dds_guid, &snapname);
1064 VERIFY(0 == nvlist_lookup_nvlist(nvfs,
1065 "snapprops", &snapprops));
1066 VERIFY(0 == nvlist_lookup_nvlist(snapprops,
1067 thissnap, &snapprops));
1068 exclude = !nvlist_exists(snapprops, "is_clone_origin");
1075 * If a filter function exists, call it to determine whether
1076 * this snapshot will be sent.
1078 if (exclude || (sdd->filter_cb != NULL &&
1079 sdd->filter_cb(zhp, sdd->filter_cb_arg) == B_FALSE)) {
1081 * This snapshot is filtered out. Don't send it, and don't
1082 * set prevsnap_obj, so it will be as if this snapshot didn't
1083 * exist, and the next accepted snapshot will be sent as
1084 * an incremental from the last accepted one, or as the
1085 * first (and full) snapshot in the case of a replication,
1086 * non-incremental send.
1092 gather_holds(zhp, sdd);
1093 fromorigin = sdd->prevsnap[0] == '\0' &&
1094 (sdd->fromorigin || sdd->replicate);
1098 err = estimate_ioctl(zhp, sdd->prevsnap_obj,
1101 if (sdd->parsable) {
1102 if (sdd->prevsnap[0] != '\0') {
1103 (void) fprintf(stderr, "incremental\t%s\t%s",
1104 sdd->prevsnap, zhp->zfs_name);
1106 (void) fprintf(stderr, "full\t%s",
1110 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1111 "send from @%s to %s"),
1112 sdd->prevsnap, zhp->zfs_name);
1115 if (sdd->parsable) {
1116 (void) fprintf(stderr, "\t%llu\n",
1120 zfs_nicenum(size, buf, sizeof (buf));
1121 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1122 " estimated size is %s\n"), buf);
1126 (void) fprintf(stderr, "\n");
1132 * If progress reporting is requested, spawn a new thread to
1133 * poll ZFS_IOC_SEND_PROGRESS at a regular interval.
1135 if (sdd->progress) {
1137 pa.pa_fd = sdd->outfd;
1138 pa.pa_parsable = sdd->parsable;
1140 if (err = pthread_create(&tid, NULL,
1141 send_progress_thread, &pa)) {
1147 err = dump_ioctl(zhp, sdd->prevsnap, sdd->prevsnap_obj,
1148 fromorigin, sdd->outfd, sdd->debugnv);
1150 if (sdd->progress) {
1151 (void) pthread_cancel(tid);
1152 (void) pthread_join(tid, NULL);
1156 (void) strcpy(sdd->prevsnap, thissnap);
1157 sdd->prevsnap_obj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID);
1163 dump_filesystem(zfs_handle_t *zhp, void *arg)
1166 send_dump_data_t *sdd = arg;
1167 boolean_t missingfrom = B_FALSE;
1168 zfs_cmd_t zc = { 0 };
1170 (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s",
1171 zhp->zfs_name, sdd->tosnap);
1172 if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) {
1173 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1174 "WARNING: could not send %s@%s: does not exist\n"),
1175 zhp->zfs_name, sdd->tosnap);
1180 if (sdd->replicate && sdd->fromsnap) {
1182 * If this fs does not have fromsnap, and we're doing
1183 * recursive, we need to send a full stream from the
1184 * beginning (or an incremental from the origin if this
1185 * is a clone). If we're doing non-recursive, then let
1186 * them get the error.
1188 (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s",
1189 zhp->zfs_name, sdd->fromsnap);
1190 if (ioctl(zhp->zfs_hdl->libzfs_fd,
1191 ZFS_IOC_OBJSET_STATS, &zc) != 0) {
1192 missingfrom = B_TRUE;
1196 sdd->seenfrom = sdd->seento = sdd->prevsnap[0] = 0;
1197 sdd->prevsnap_obj = 0;
1198 if (sdd->fromsnap == NULL || missingfrom)
1199 sdd->seenfrom = B_TRUE;
1201 rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg);
1202 if (!sdd->seenfrom) {
1203 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1204 "WARNING: could not send %s@%s:\n"
1205 "incremental source (%s@%s) does not exist\n"),
1206 zhp->zfs_name, sdd->tosnap,
1207 zhp->zfs_name, sdd->fromsnap);
1209 } else if (!sdd->seento) {
1210 if (sdd->fromsnap) {
1211 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1212 "WARNING: could not send %s@%s:\n"
1213 "incremental source (%s@%s) "
1214 "is not earlier than it\n"),
1215 zhp->zfs_name, sdd->tosnap,
1216 zhp->zfs_name, sdd->fromsnap);
1218 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1220 "could not send %s@%s: does not exist\n"),
1221 zhp->zfs_name, sdd->tosnap);
1230 dump_filesystems(zfs_handle_t *rzhp, void *arg)
1232 send_dump_data_t *sdd = arg;
1234 boolean_t needagain, progress;
1236 if (!sdd->replicate)
1237 return (dump_filesystem(rzhp, sdd));
1239 /* Mark the clone origin snapshots. */
1240 for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
1241 fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
1243 uint64_t origin_guid = 0;
1245 VERIFY(0 == nvpair_value_nvlist(fspair, &nvfs));
1246 (void) nvlist_lookup_uint64(nvfs, "origin", &origin_guid);
1247 if (origin_guid != 0) {
1249 nvlist_t *origin_nv = fsavl_find(sdd->fsavl,
1250 origin_guid, &snapname);
1251 if (origin_nv != NULL) {
1252 nvlist_t *snapprops;
1253 VERIFY(0 == nvlist_lookup_nvlist(origin_nv,
1254 "snapprops", &snapprops));
1255 VERIFY(0 == nvlist_lookup_nvlist(snapprops,
1256 snapname, &snapprops));
1257 VERIFY(0 == nvlist_add_boolean(
1258 snapprops, "is_clone_origin"));
1263 needagain = progress = B_FALSE;
1264 for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
1265 fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
1266 nvlist_t *fslist, *parent_nv;
1270 uint64_t origin_guid = 0;
1271 uint64_t parent_guid = 0;
1273 VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0);
1274 if (nvlist_lookup_boolean(fslist, "sent") == 0)
1277 VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0);
1278 (void) nvlist_lookup_uint64(fslist, "origin", &origin_guid);
1279 (void) nvlist_lookup_uint64(fslist, "parentfromsnap",
1282 if (parent_guid != 0) {
1283 parent_nv = fsavl_find(sdd->fsavl, parent_guid, NULL);
1284 if (!nvlist_exists(parent_nv, "sent")) {
1285 /* parent has not been sent; skip this one */
1291 if (origin_guid != 0) {
1292 nvlist_t *origin_nv = fsavl_find(sdd->fsavl,
1294 if (origin_nv != NULL &&
1295 !nvlist_exists(origin_nv, "sent")) {
1297 * origin has not been sent yet;
1305 zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET);
1308 err = dump_filesystem(zhp, sdd);
1309 VERIFY(nvlist_add_boolean(fslist, "sent") == 0);
1320 /* clean out the sent flags in case we reuse this fss */
1321 for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair;
1322 fspair = nvlist_next_nvpair(sdd->fss, fspair)) {
1325 VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0);
1326 (void) nvlist_remove_all(fslist, "sent");
1333 * Generate a send stream for the dataset identified by the argument zhp.
1335 * The content of the send stream is the snapshot identified by
1336 * 'tosnap'. Incremental streams are requested in two ways:
1337 * - from the snapshot identified by "fromsnap" (if non-null) or
1338 * - from the origin of the dataset identified by zhp, which must
1339 * be a clone. In this case, "fromsnap" is null and "fromorigin"
1342 * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and
1343 * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM)
1344 * if "replicate" is set. If "doall" is set, dump all the intermediate
1345 * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall"
1346 * case too. If "props" is set, send properties.
1349 zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap,
1350 sendflags_t *flags, int outfd, snapfilter_cb_t filter_func,
1351 void *cb_arg, nvlist_t **debugnvp)
1354 send_dump_data_t sdd = { 0 };
1356 nvlist_t *fss = NULL;
1357 avl_tree_t *fsavl = NULL;
1358 static uint64_t holdseq;
1362 dedup_arg_t dda = { 0 };
1363 int featureflags = 0;
1365 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1366 "cannot send '%s'"), zhp->zfs_name);
1368 if (fromsnap && fromsnap[0] == '\0') {
1369 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1370 "zero-length incremental source"));
1371 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
1374 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM) {
1376 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1377 if (version >= ZPL_VERSION_SA) {
1378 featureflags |= DMU_BACKUP_FEATURE_SA_SPILL;
1382 if (flags->dedup && !flags->dryrun) {
1383 featureflags |= (DMU_BACKUP_FEATURE_DEDUP |
1384 DMU_BACKUP_FEATURE_DEDUPPROPS);
1385 if (err = pipe(pipefd)) {
1386 zfs_error_aux(zhp->zfs_hdl, strerror(errno));
1387 return (zfs_error(zhp->zfs_hdl, EZFS_PIPEFAILED,
1390 dda.outputfd = outfd;
1391 dda.inputfd = pipefd[1];
1392 dda.dedup_hdl = zhp->zfs_hdl;
1393 if (err = pthread_create(&tid, NULL, cksummer, &dda)) {
1394 (void) close(pipefd[0]);
1395 (void) close(pipefd[1]);
1396 zfs_error_aux(zhp->zfs_hdl, strerror(errno));
1397 return (zfs_error(zhp->zfs_hdl,
1398 EZFS_THREADCREATEFAILED, errbuf));
1402 if (flags->replicate || flags->doall || flags->props) {
1403 dmu_replay_record_t drr = { 0 };
1404 char *packbuf = NULL;
1406 zio_cksum_t zc = { 0 };
1408 if (flags->replicate || flags->props) {
1411 VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0));
1413 VERIFY(0 == nvlist_add_string(hdrnv,
1414 "fromsnap", fromsnap));
1416 VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap));
1417 if (!flags->replicate) {
1418 VERIFY(0 == nvlist_add_boolean(hdrnv,
1422 err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name,
1423 fromsnap, tosnap, flags->replicate, &fss, &fsavl);
1426 VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss));
1427 err = nvlist_pack(hdrnv, &packbuf, &buflen,
1437 if (!flags->dryrun) {
1438 /* write first begin record */
1439 drr.drr_type = DRR_BEGIN;
1440 drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
1441 DMU_SET_STREAM_HDRTYPE(drr.drr_u.drr_begin.
1442 drr_versioninfo, DMU_COMPOUNDSTREAM);
1443 DMU_SET_FEATUREFLAGS(drr.drr_u.drr_begin.
1444 drr_versioninfo, featureflags);
1445 (void) snprintf(drr.drr_u.drr_begin.drr_toname,
1446 sizeof (drr.drr_u.drr_begin.drr_toname),
1447 "%s@%s", zhp->zfs_name, tosnap);
1448 drr.drr_payloadlen = buflen;
1449 err = cksum_and_write(&drr, sizeof (drr), &zc, outfd);
1451 /* write header nvlist */
1452 if (err != -1 && packbuf != NULL) {
1453 err = cksum_and_write(packbuf, buflen, &zc,
1462 /* write end record */
1463 bzero(&drr, sizeof (drr));
1464 drr.drr_type = DRR_END;
1465 drr.drr_u.drr_end.drr_checksum = zc;
1466 err = write(outfd, &drr, sizeof (drr));
1476 /* dump each stream */
1477 sdd.fromsnap = fromsnap;
1478 sdd.tosnap = tosnap;
1480 sdd.outfd = pipefd[0];
1483 sdd.replicate = flags->replicate;
1484 sdd.doall = flags->doall;
1485 sdd.fromorigin = flags->fromorigin;
1488 sdd.verbose = flags->verbose;
1489 sdd.parsable = flags->parsable;
1490 sdd.progress = flags->progress;
1491 sdd.dryrun = flags->dryrun;
1492 sdd.filter_cb = filter_func;
1493 sdd.filter_cb_arg = cb_arg;
1495 sdd.debugnv = *debugnvp;
1498 * Some flags require that we place user holds on the datasets that are
1499 * being sent so they don't get destroyed during the send. We can skip
1500 * this step if the pool is imported read-only since the datasets cannot
1503 if (!flags->dryrun && !zpool_get_prop_int(zfs_get_pool_handle(zhp),
1504 ZPOOL_PROP_READONLY, NULL) &&
1505 zfs_spa_version(zhp, &spa_version) == 0 &&
1506 spa_version >= SPA_VERSION_USERREFS &&
1507 (flags->doall || flags->replicate)) {
1509 (void) snprintf(sdd.holdtag, sizeof (sdd.holdtag),
1510 ".send-%d-%llu", getpid(), (u_longlong_t)holdseq);
1511 sdd.cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL);
1512 if (sdd.cleanup_fd < 0) {
1516 sdd.snapholds = fnvlist_alloc();
1518 sdd.cleanup_fd = -1;
1519 sdd.snapholds = NULL;
1521 if (flags->verbose || sdd.snapholds != NULL) {
1523 * Do a verbose no-op dry run to get all the verbose output
1524 * or to gather snapshot hold's before generating any data,
1525 * then do a non-verbose real run to generate the streams.
1527 sdd.dryrun = B_TRUE;
1528 err = dump_filesystems(zhp, &sdd);
1533 if (flags->verbose) {
1534 if (flags->parsable) {
1535 (void) fprintf(stderr, "size\t%llu\n",
1536 (longlong_t)sdd.size);
1539 zfs_nicenum(sdd.size, buf, sizeof (buf));
1540 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
1541 "total estimated size is %s\n"), buf);
1545 /* Ensure no snaps found is treated as an error. */
1551 /* Skip the second run if dryrun was requested. */
1555 if (sdd.snapholds != NULL) {
1556 err = zfs_hold_nvl(zhp, sdd.cleanup_fd, sdd.snapholds);
1560 fnvlist_free(sdd.snapholds);
1561 sdd.snapholds = NULL;
1564 sdd.dryrun = B_FALSE;
1565 sdd.verbose = B_FALSE;
1568 err = dump_filesystems(zhp, &sdd);
1569 fsavl_destroy(fsavl);
1572 /* Ensure no snaps found is treated as an error. */
1573 if (err == 0 && !sdd.seento)
1578 (void) pthread_cancel(tid);
1579 (void) close(pipefd[0]);
1580 (void) pthread_join(tid, NULL);
1583 if (sdd.cleanup_fd != -1) {
1584 VERIFY(0 == close(sdd.cleanup_fd));
1585 sdd.cleanup_fd = -1;
1588 if (!flags->dryrun && (flags->replicate || flags->doall ||
1591 * write final end record. NB: want to do this even if
1592 * there was some error, because it might not be totally
1595 dmu_replay_record_t drr = { 0 };
1596 drr.drr_type = DRR_END;
1597 if (write(outfd, &drr, sizeof (drr)) == -1) {
1598 return (zfs_standard_error(zhp->zfs_hdl,
1603 return (err || sdd.err);
1606 err = zfs_standard_error(zhp->zfs_hdl, err, errbuf);
1608 fsavl_destroy(fsavl);
1610 fnvlist_free(sdd.snapholds);
1612 if (sdd.cleanup_fd != -1)
1613 VERIFY(0 == close(sdd.cleanup_fd));
1615 (void) pthread_cancel(tid);
1616 (void) close(pipefd[0]);
1617 (void) pthread_join(tid, NULL);
1623 * Routines specific to "zfs recv"
1627 recv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen,
1628 boolean_t byteswap, zio_cksum_t *zc)
1635 rv = read(fd, cp, len);
1640 if (rv < 0 || len != 0) {
1641 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1642 "failed to read from stream"));
1643 return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN,
1644 "cannot receive")));
1649 fletcher_4_incremental_byteswap(buf, ilen, zc);
1651 fletcher_4_incremental_native(buf, ilen, zc);
1657 recv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp,
1658 boolean_t byteswap, zio_cksum_t *zc)
1663 buf = zfs_alloc(hdl, len);
1667 err = recv_read(hdl, fd, buf, len, byteswap, zc);
1673 err = nvlist_unpack(buf, len, nvp, 0);
1676 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
1677 "stream (malformed nvlist)"));
1684 recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname,
1685 int baselen, char *newname, recvflags_t *flags)
1688 zfs_cmd_t zc = { 0 };
1690 prop_changelist_t *clp;
1693 zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET);
1696 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
1697 flags->force ? MS_FORCE : 0);
1701 err = changelist_prefix(clp);
1705 zc.zc_objset_type = DMU_OST_ZFS;
1706 (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
1709 (void) strcpy(newname, tryname);
1711 (void) strlcpy(zc.zc_value, tryname, sizeof (zc.zc_value));
1713 if (flags->verbose) {
1714 (void) printf("attempting rename %s to %s\n",
1715 zc.zc_name, zc.zc_value);
1717 err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc);
1719 changelist_rename(clp, name, tryname);
1724 if (err != 0 && strncmp(name + baselen, "recv-", 5) != 0) {
1727 (void) snprintf(newname, ZFS_MAXNAMELEN, "%.*srecv-%u-%u",
1728 baselen, name, getpid(), seq);
1729 (void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value));
1731 if (flags->verbose) {
1732 (void) printf("failed - trying rename %s to %s\n",
1733 zc.zc_name, zc.zc_value);
1735 err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc);
1737 changelist_rename(clp, name, newname);
1738 if (err && flags->verbose) {
1739 (void) printf("failed (%u) - "
1740 "will try again on next pass\n", errno);
1743 } else if (flags->verbose) {
1745 (void) printf("success\n");
1747 (void) printf("failed (%u)\n", errno);
1750 (void) changelist_postfix(clp);
1751 changelist_free(clp);
1757 recv_destroy(libzfs_handle_t *hdl, const char *name, int baselen,
1758 char *newname, recvflags_t *flags)
1760 zfs_cmd_t zc = { 0 };
1762 prop_changelist_t *clp;
1764 boolean_t defer = B_FALSE;
1767 zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET);
1770 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
1771 flags->force ? MS_FORCE : 0);
1772 if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
1773 zfs_spa_version(zhp, &spa_version) == 0 &&
1774 spa_version >= SPA_VERSION_USERREFS)
1779 err = changelist_prefix(clp);
1783 zc.zc_objset_type = DMU_OST_ZFS;
1784 zc.zc_defer_destroy = defer;
1785 (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name));
1788 (void) printf("attempting destroy %s\n", zc.zc_name);
1789 err = ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc);
1792 (void) printf("success\n");
1793 changelist_remove(clp, zc.zc_name);
1796 (void) changelist_postfix(clp);
1797 changelist_free(clp);
1800 * Deferred destroy might destroy the snapshot or only mark it to be
1801 * destroyed later, and it returns success in either case.
1803 if (err != 0 || (defer && zfs_dataset_exists(hdl, name,
1804 ZFS_TYPE_SNAPSHOT))) {
1805 err = recv_rename(hdl, name, NULL, baselen, newname, flags);
1811 typedef struct guid_to_name_data {
1815 } guid_to_name_data_t;
1818 guid_to_name_cb(zfs_handle_t *zhp, void *arg)
1820 guid_to_name_data_t *gtnd = arg;
1823 if (gtnd->skip != NULL &&
1824 strcmp(zhp->zfs_name, gtnd->skip) == 0) {
1828 if (zhp->zfs_dmustats.dds_guid == gtnd->guid) {
1829 (void) strcpy(gtnd->name, zhp->zfs_name);
1834 err = zfs_iter_children(zhp, guid_to_name_cb, gtnd);
1840 * Attempt to find the local dataset associated with this guid. In the case of
1841 * multiple matches, we attempt to find the "best" match by searching
1842 * progressively larger portions of the hierarchy. This allows one to send a
1843 * tree of datasets individually and guarantee that we will find the source
1844 * guid within that hierarchy, even if there are multiple matches elsewhere.
1847 guid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid,
1850 /* exhaustive search all local snapshots */
1851 char pname[ZFS_MAXNAMELEN];
1852 guid_to_name_data_t gtnd;
1861 (void) strlcpy(pname, parent, sizeof (pname));
1864 * Search progressively larger portions of the hierarchy. This will
1865 * select the "most local" version of the origin snapshot in the case
1866 * that there are multiple matching snapshots in the system.
1868 while ((cp = strrchr(pname, '/')) != NULL) {
1870 /* Chop off the last component and open the parent */
1872 zhp = make_dataset_handle(hdl, pname);
1877 err = zfs_iter_children(zhp, guid_to_name_cb, >nd);
1883 * Remember the dataset that we already searched, so we
1884 * skip it next time through.
1893 * Return +1 if guid1 is before guid2, 0 if they are the same, and -1 if
1894 * guid1 is after guid2.
1897 created_before(libzfs_handle_t *hdl, avl_tree_t *avl,
1898 uint64_t guid1, uint64_t guid2)
1901 char *fsname, *snapname;
1902 char buf[ZFS_MAXNAMELEN];
1904 zfs_handle_t *guid1hdl, *guid2hdl;
1905 uint64_t create1, create2;
1912 nvfs = fsavl_find(avl, guid1, &snapname);
1913 VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
1914 (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname);
1915 guid1hdl = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT);
1916 if (guid1hdl == NULL)
1919 nvfs = fsavl_find(avl, guid2, &snapname);
1920 VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
1921 (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname);
1922 guid2hdl = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT);
1923 if (guid2hdl == NULL) {
1924 zfs_close(guid1hdl);
1928 create1 = zfs_prop_get_int(guid1hdl, ZFS_PROP_CREATETXG);
1929 create2 = zfs_prop_get_int(guid2hdl, ZFS_PROP_CREATETXG);
1931 if (create1 < create2)
1933 else if (create1 > create2)
1938 zfs_close(guid1hdl);
1939 zfs_close(guid2hdl);
1945 recv_incremental_replication(libzfs_handle_t *hdl, const char *tofs,
1946 recvflags_t *flags, nvlist_t *stream_nv, avl_tree_t *stream_avl,
1949 nvlist_t *local_nv, *deleted = NULL;
1950 avl_tree_t *local_avl;
1951 nvpair_t *fselem, *nextfselem;
1953 char newname[ZFS_MAXNAMELEN];
1956 boolean_t needagain, progress, recursive;
1959 VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap));
1961 recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") ==
1968 needagain = progress = B_FALSE;
1970 VERIFY(0 == nvlist_alloc(&deleted, NV_UNIQUE_NAME, 0));
1972 if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL,
1973 recursive, &local_nv, &local_avl)) != 0)
1977 * Process deletes and renames
1979 for (fselem = nvlist_next_nvpair(local_nv, NULL);
1980 fselem; fselem = nextfselem) {
1981 nvlist_t *nvfs, *snaps;
1982 nvlist_t *stream_nvfs = NULL;
1983 nvpair_t *snapelem, *nextsnapelem;
1984 uint64_t fromguid = 0;
1985 uint64_t originguid = 0;
1986 uint64_t stream_originguid = 0;
1987 uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid;
1988 char *fsname, *stream_fsname;
1990 nextfselem = nvlist_next_nvpair(local_nv, fselem);
1992 VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs));
1993 VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps));
1994 VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname));
1995 VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap",
1996 &parent_fromsnap_guid));
1997 (void) nvlist_lookup_uint64(nvfs, "origin", &originguid);
2000 * First find the stream's fs, so we can check for
2001 * a different origin (due to "zfs promote")
2003 for (snapelem = nvlist_next_nvpair(snaps, NULL);
2004 snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) {
2007 VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid));
2008 stream_nvfs = fsavl_find(stream_avl, thisguid, NULL);
2010 if (stream_nvfs != NULL)
2014 /* check for promote */
2015 (void) nvlist_lookup_uint64(stream_nvfs, "origin",
2016 &stream_originguid);
2017 if (stream_nvfs && originguid != stream_originguid) {
2018 switch (created_before(hdl, local_avl,
2019 stream_originguid, originguid)) {
2022 zfs_cmd_t zc = { 0 };
2023 nvlist_t *origin_nvfs;
2024 char *origin_fsname;
2027 (void) printf("promoting %s\n", fsname);
2029 origin_nvfs = fsavl_find(local_avl, originguid,
2031 VERIFY(0 == nvlist_lookup_string(origin_nvfs,
2032 "name", &origin_fsname));
2033 (void) strlcpy(zc.zc_value, origin_fsname,
2034 sizeof (zc.zc_value));
2035 (void) strlcpy(zc.zc_name, fsname,
2036 sizeof (zc.zc_name));
2037 error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
2045 fsavl_destroy(local_avl);
2046 nvlist_free(local_nv);
2050 * We had/have the wrong origin, therefore our
2051 * list of snapshots is wrong. Need to handle
2052 * them on the next pass.
2058 for (snapelem = nvlist_next_nvpair(snaps, NULL);
2059 snapelem; snapelem = nextsnapelem) {
2061 char *stream_snapname;
2062 nvlist_t *found, *props;
2064 nextsnapelem = nvlist_next_nvpair(snaps, snapelem);
2066 VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid));
2067 found = fsavl_find(stream_avl, thisguid,
2070 /* check for delete */
2071 if (found == NULL) {
2072 char name[ZFS_MAXNAMELEN];
2077 (void) snprintf(name, sizeof (name), "%s@%s",
2078 fsname, nvpair_name(snapelem));
2080 error = recv_destroy(hdl, name,
2081 strlen(fsname)+1, newname, flags);
2086 sprintf(guidname, "%lu", thisguid);
2087 nvlist_add_boolean(deleted, guidname);
2091 stream_nvfs = found;
2093 if (0 == nvlist_lookup_nvlist(stream_nvfs, "snapprops",
2094 &props) && 0 == nvlist_lookup_nvlist(props,
2095 stream_snapname, &props)) {
2096 zfs_cmd_t zc = { 0 };
2098 zc.zc_cookie = B_TRUE; /* received */
2099 (void) snprintf(zc.zc_name, sizeof (zc.zc_name),
2100 "%s@%s", fsname, nvpair_name(snapelem));
2101 if (zcmd_write_src_nvlist(hdl, &zc,
2103 (void) zfs_ioctl(hdl,
2104 ZFS_IOC_SET_PROP, &zc);
2105 zcmd_free_nvlists(&zc);
2109 /* check for different snapname */
2110 if (strcmp(nvpair_name(snapelem),
2111 stream_snapname) != 0) {
2112 char name[ZFS_MAXNAMELEN];
2113 char tryname[ZFS_MAXNAMELEN];
2115 (void) snprintf(name, sizeof (name), "%s@%s",
2116 fsname, nvpair_name(snapelem));
2117 (void) snprintf(tryname, sizeof (name), "%s@%s",
2118 fsname, stream_snapname);
2120 error = recv_rename(hdl, name, tryname,
2121 strlen(fsname)+1, newname, flags);
2128 if (strcmp(stream_snapname, fromsnap) == 0)
2129 fromguid = thisguid;
2132 /* check for delete */
2133 if (stream_nvfs == NULL) {
2137 error = recv_destroy(hdl, fsname, strlen(tofs)+1,
2143 sprintf(guidname, "%lu", parent_fromsnap_guid);
2144 nvlist_add_boolean(deleted, guidname);
2148 if (fromguid == 0) {
2149 if (flags->verbose) {
2150 (void) printf("local fs %s does not have "
2151 "fromsnap (%s in stream); must have "
2152 "been deleted locally; ignoring\n",
2158 VERIFY(0 == nvlist_lookup_string(stream_nvfs,
2159 "name", &stream_fsname));
2160 VERIFY(0 == nvlist_lookup_uint64(stream_nvfs,
2161 "parentfromsnap", &stream_parent_fromsnap_guid));
2163 s1 = strrchr(fsname, '/');
2164 s2 = strrchr(stream_fsname, '/');
2167 * Check if we're going to rename based on parent guid change
2168 * and the current parent guid was also deleted. If it was then
2169 * rename will fail and is likely unneeded, so avoid this and
2170 * force an early retry to determine the new
2171 * parent_fromsnap_guid.
2173 if (stream_parent_fromsnap_guid != 0 &&
2174 parent_fromsnap_guid != 0 &&
2175 stream_parent_fromsnap_guid != parent_fromsnap_guid) {
2176 sprintf(guidname, "%lu", parent_fromsnap_guid);
2177 if (nvlist_exists(deleted, guidname)) {
2185 * Check for rename. If the exact receive path is specified, it
2186 * does not count as a rename, but we still need to check the
2187 * datasets beneath it.
2189 if ((stream_parent_fromsnap_guid != 0 &&
2190 parent_fromsnap_guid != 0 &&
2191 stream_parent_fromsnap_guid != parent_fromsnap_guid) ||
2192 ((flags->isprefix || strcmp(tofs, fsname) != 0) &&
2193 (s1 != NULL) && (s2 != NULL) && strcmp(s1, s2) != 0)) {
2195 char tryname[ZFS_MAXNAMELEN];
2197 parent = fsavl_find(local_avl,
2198 stream_parent_fromsnap_guid, NULL);
2200 * NB: parent might not be found if we used the
2201 * tosnap for stream_parent_fromsnap_guid,
2202 * because the parent is a newly-created fs;
2203 * we'll be able to rename it after we recv the
2206 if (parent != NULL) {
2209 VERIFY(0 == nvlist_lookup_string(parent, "name",
2211 (void) snprintf(tryname, sizeof (tryname),
2212 "%s%s", pname, strrchr(stream_fsname, '/'));
2215 if (flags->verbose) {
2216 (void) printf("local fs %s new parent "
2217 "not found\n", fsname);
2223 error = recv_rename(hdl, fsname, tryname,
2224 strlen(tofs)+1, newname, flags);
2226 if (renamed != NULL && newname[0] != '\0') {
2227 VERIFY(0 == nvlist_add_boolean(renamed,
2239 fsavl_destroy(local_avl);
2240 nvlist_free(local_nv);
2241 nvlist_free(deleted);
2243 if (needagain && progress) {
2244 /* do another pass to fix up temporary names */
2246 (void) printf("another pass:\n");
2254 zfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname,
2255 recvflags_t *flags, dmu_replay_record_t *drr, zio_cksum_t *zc,
2256 char **top_zfs, int cleanup_fd, uint64_t *action_handlep)
2258 nvlist_t *stream_nv = NULL;
2259 avl_tree_t *stream_avl = NULL;
2260 char *fromsnap = NULL;
2262 char tofs[ZFS_MAXNAMELEN];
2263 char sendfs[ZFS_MAXNAMELEN];
2265 dmu_replay_record_t drre;
2267 boolean_t anyerr = B_FALSE;
2268 boolean_t softerr = B_FALSE;
2269 boolean_t recursive;
2271 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2274 assert(drr->drr_type == DRR_BEGIN);
2275 assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC);
2276 assert(DMU_GET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo) ==
2277 DMU_COMPOUNDSTREAM);
2280 * Read in the nvlist from the stream.
2282 if (drr->drr_payloadlen != 0) {
2283 error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen,
2284 &stream_nv, flags->byteswap, zc);
2286 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
2291 recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") ==
2294 if (recursive && strchr(destname, '@')) {
2295 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2296 "cannot specify snapshot name for multi-snapshot stream"));
2297 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
2302 * Read in the end record and verify checksum.
2304 if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre),
2305 flags->byteswap, NULL)))
2307 if (flags->byteswap) {
2308 drre.drr_type = BSWAP_32(drre.drr_type);
2309 drre.drr_u.drr_end.drr_checksum.zc_word[0] =
2310 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]);
2311 drre.drr_u.drr_end.drr_checksum.zc_word[1] =
2312 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]);
2313 drre.drr_u.drr_end.drr_checksum.zc_word[2] =
2314 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]);
2315 drre.drr_u.drr_end.drr_checksum.zc_word[3] =
2316 BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]);
2318 if (drre.drr_type != DRR_END) {
2319 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
2322 if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) {
2323 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2324 "incorrect header checksum"));
2325 error = zfs_error(hdl, EZFS_BADSTREAM, errbuf);
2329 (void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap);
2331 if (drr->drr_payloadlen != 0) {
2332 nvlist_t *stream_fss;
2334 VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss",
2336 if ((stream_avl = fsavl_create(stream_fss)) == NULL) {
2337 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2338 "couldn't allocate avl tree"));
2339 error = zfs_error(hdl, EZFS_NOMEM, errbuf);
2343 if (fromsnap != NULL) {
2344 nvlist_t *renamed = NULL;
2345 nvpair_t *pair = NULL;
2347 (void) strlcpy(tofs, destname, ZFS_MAXNAMELEN);
2348 if (flags->isprefix) {
2349 struct drr_begin *drrb = &drr->drr_u.drr_begin;
2352 if (flags->istail) {
2353 cp = strrchr(drrb->drr_toname, '/');
2355 (void) strlcat(tofs, "/",
2359 i = (cp - drrb->drr_toname);
2362 i = strcspn(drrb->drr_toname, "/@");
2364 /* zfs_receive_one() will create_parents() */
2365 (void) strlcat(tofs, &drrb->drr_toname[i],
2367 *strchr(tofs, '@') = '\0';
2370 if (recursive && !flags->dryrun && !flags->nomount) {
2371 VERIFY(0 == nvlist_alloc(&renamed,
2372 NV_UNIQUE_NAME, 0));
2375 softerr = recv_incremental_replication(hdl, tofs, flags,
2376 stream_nv, stream_avl, renamed);
2378 /* Unmount renamed filesystems before receiving. */
2379 while ((pair = nvlist_next_nvpair(renamed,
2382 prop_changelist_t *clp = NULL;
2384 zhp = zfs_open(hdl, nvpair_name(pair),
2385 ZFS_TYPE_FILESYSTEM);
2387 clp = changelist_gather(zhp,
2388 ZFS_PROP_MOUNTPOINT, 0, 0);
2392 changelist_prefix(clp);
2393 changelist_free(clp);
2398 nvlist_free(renamed);
2403 * Get the fs specified by the first path in the stream (the top level
2404 * specified by 'zfs send') and pass it to each invocation of
2405 * zfs_receive_one().
2407 (void) strlcpy(sendfs, drr->drr_u.drr_begin.drr_toname,
2409 if ((cp = strchr(sendfs, '@')) != NULL)
2412 /* Finally, receive each contained stream */
2415 * we should figure out if it has a recoverable
2416 * error, in which case do a recv_skip() and drive on.
2417 * Note, if we fail due to already having this guid,
2418 * zfs_receive_one() will take care of it (ie,
2419 * recv_skip() and return 0).
2421 error = zfs_receive_impl(hdl, destname, flags, fd,
2422 sendfs, stream_nv, stream_avl, top_zfs, cleanup_fd,
2424 if (error == ENODATA) {
2429 } while (error == 0);
2431 if (drr->drr_payloadlen != 0 && fromsnap != NULL) {
2433 * Now that we have the fs's they sent us, try the
2436 softerr = recv_incremental_replication(hdl, tofs, flags,
2437 stream_nv, stream_avl, NULL);
2441 fsavl_destroy(stream_avl);
2443 nvlist_free(stream_nv);
2452 trunc_prop_errs(int truncated)
2454 ASSERT(truncated != 0);
2457 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
2458 "1 more property could not be set\n"));
2460 (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
2461 "%d more properties could not be set\n"), truncated);
2465 recv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap)
2467 dmu_replay_record_t *drr;
2468 void *buf = malloc(1<<20);
2471 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2472 "cannot receive:"));
2474 /* XXX would be great to use lseek if possible... */
2477 while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t),
2478 byteswap, NULL) == 0) {
2480 drr->drr_type = BSWAP_32(drr->drr_type);
2482 switch (drr->drr_type) {
2484 /* NB: not to be used on v2 stream packages */
2485 if (drr->drr_payloadlen != 0) {
2486 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2487 "invalid substream header"));
2488 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
2498 drr->drr_u.drr_object.drr_bonuslen =
2499 BSWAP_32(drr->drr_u.drr_object.
2502 (void) recv_read(hdl, fd, buf,
2503 P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8),
2509 drr->drr_u.drr_write.drr_length =
2510 BSWAP_64(drr->drr_u.drr_write.drr_length);
2512 (void) recv_read(hdl, fd, buf,
2513 drr->drr_u.drr_write.drr_length, B_FALSE, NULL);
2517 drr->drr_u.drr_write.drr_length =
2518 BSWAP_64(drr->drr_u.drr_spill.drr_length);
2520 (void) recv_read(hdl, fd, buf,
2521 drr->drr_u.drr_spill.drr_length, B_FALSE, NULL);
2523 case DRR_WRITE_BYREF:
2524 case DRR_FREEOBJECTS:
2529 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2530 "invalid record type"));
2531 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
2540 * Restores a backup of tosnap from the file descriptor specified by infd.
2543 zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
2544 recvflags_t *flags, dmu_replay_record_t *drr,
2545 dmu_replay_record_t *drr_noswap, const char *sendfs,
2546 nvlist_t *stream_nv, avl_tree_t *stream_avl, char **top_zfs, int cleanup_fd,
2547 uint64_t *action_handlep)
2549 zfs_cmd_t zc = { 0 };
2551 int ioctl_err, ioctl_errno, err;
2553 struct drr_begin *drrb = &drr->drr_u.drr_begin;
2555 char prop_errbuf[1024];
2556 const char *chopprefix;
2557 boolean_t newfs = B_FALSE;
2558 boolean_t stream_wantsnewfs;
2559 uint64_t parent_snapguid = 0;
2560 prop_changelist_t *clp = NULL;
2561 nvlist_t *snapprops_nvlist = NULL;
2562 zprop_errflags_t prop_errflags;
2563 boolean_t recursive;
2565 begin_time = time(NULL);
2567 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2570 recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") ==
2573 if (stream_avl != NULL) {
2575 nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid,
2580 (void) nvlist_lookup_uint64(fs, "parentfromsnap",
2582 err = nvlist_lookup_nvlist(fs, "props", &props);
2584 VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0));
2586 if (flags->canmountoff) {
2587 VERIFY(0 == nvlist_add_uint64(props,
2588 zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0));
2590 ret = zcmd_write_src_nvlist(hdl, &zc, props);
2594 if (0 == nvlist_lookup_nvlist(fs, "snapprops", &props)) {
2595 VERIFY(0 == nvlist_lookup_nvlist(props,
2596 snapname, &snapprops_nvlist));
2606 * Determine how much of the snapshot name stored in the stream
2607 * we are going to tack on to the name they specified on the
2608 * command line, and how much we are going to chop off.
2610 * If they specified a snapshot, chop the entire name stored in
2613 if (flags->istail) {
2615 * A filesystem was specified with -e. We want to tack on only
2616 * the tail of the sent snapshot path.
2618 if (strchr(tosnap, '@')) {
2619 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
2620 "argument - snapshot not allowed with -e"));
2621 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2624 chopprefix = strrchr(sendfs, '/');
2626 if (chopprefix == NULL) {
2628 * The tail is the poolname, so we need to
2629 * prepend a path separator.
2631 int len = strlen(drrb->drr_toname);
2632 cp = malloc(len + 2);
2634 (void) strcpy(&cp[1], drrb->drr_toname);
2637 chopprefix = drrb->drr_toname + (chopprefix - sendfs);
2639 } else if (flags->isprefix) {
2641 * A filesystem was specified with -d. We want to tack on
2642 * everything but the first element of the sent snapshot path
2643 * (all but the pool name).
2645 if (strchr(tosnap, '@')) {
2646 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
2647 "argument - snapshot not allowed with -d"));
2648 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2651 chopprefix = strchr(drrb->drr_toname, '/');
2652 if (chopprefix == NULL)
2653 chopprefix = strchr(drrb->drr_toname, '@');
2654 } else if (strchr(tosnap, '@') == NULL) {
2656 * If a filesystem was specified without -d or -e, we want to
2657 * tack on everything after the fs specified by 'zfs send'.
2659 chopprefix = drrb->drr_toname + strlen(sendfs);
2661 /* A snapshot was specified as an exact path (no -d or -e). */
2663 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2664 "cannot specify snapshot name for multi-snapshot "
2666 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
2668 chopprefix = drrb->drr_toname + strlen(drrb->drr_toname);
2671 ASSERT(strstr(drrb->drr_toname, sendfs) == drrb->drr_toname);
2672 ASSERT(chopprefix > drrb->drr_toname);
2673 ASSERT(chopprefix <= drrb->drr_toname + strlen(drrb->drr_toname));
2674 ASSERT(chopprefix[0] == '/' || chopprefix[0] == '@' ||
2675 chopprefix[0] == '\0');
2678 * Determine name of destination snapshot, store in zc_value.
2680 (void) strcpy(zc.zc_value, tosnap);
2681 (void) strncat(zc.zc_value, chopprefix, sizeof (zc.zc_value));
2683 if (zfs_ioctl_version == ZFS_IOCVER_UNDEF)
2684 zfs_ioctl_version = get_zfs_ioctl_version();
2686 * For forward compatibility hide tosnap in zc_value
2688 if (zfs_ioctl_version < ZFS_IOCVER_LZC)
2689 (void) strcpy(zc.zc_value + strlen(zc.zc_value) + 1, tosnap);
2692 if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT)) {
2693 zcmd_free_nvlists(&zc);
2694 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2698 * Determine the name of the origin snapshot, store in zc_string.
2700 if (drrb->drr_flags & DRR_FLAG_CLONE) {
2701 if (guid_to_name(hdl, zc.zc_value,
2702 drrb->drr_fromguid, zc.zc_string) != 0) {
2703 zcmd_free_nvlists(&zc);
2704 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2705 "local origin for clone %s does not exist"),
2707 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2710 (void) printf("found clone origin %s\n", zc.zc_string);
2713 stream_wantsnewfs = (drrb->drr_fromguid == 0 ||
2714 (drrb->drr_flags & DRR_FLAG_CLONE));
2716 if (stream_wantsnewfs) {
2718 * if the parent fs does not exist, look for it based on
2719 * the parent snap GUID
2721 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2722 "cannot receive new filesystem stream"));
2724 (void) strcpy(zc.zc_name, zc.zc_value);
2725 cp = strrchr(zc.zc_name, '/');
2729 !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
2730 char suffix[ZFS_MAXNAMELEN];
2731 (void) strcpy(suffix, strrchr(zc.zc_value, '/'));
2732 if (guid_to_name(hdl, zc.zc_name, parent_snapguid,
2733 zc.zc_value) == 0) {
2734 *strchr(zc.zc_value, '@') = '\0';
2735 (void) strcat(zc.zc_value, suffix);
2740 * if the fs does not exist, look for it based on the
2743 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2744 "cannot receive incremental stream"));
2746 (void) strcpy(zc.zc_name, zc.zc_value);
2747 *strchr(zc.zc_name, '@') = '\0';
2750 * If the exact receive path was specified and this is the
2751 * topmost path in the stream, then if the fs does not exist we
2752 * should look no further.
2754 if ((flags->isprefix || (*(chopprefix = drrb->drr_toname +
2755 strlen(sendfs)) != '\0' && *chopprefix != '@')) &&
2756 !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
2757 char snap[ZFS_MAXNAMELEN];
2758 (void) strcpy(snap, strchr(zc.zc_value, '@'));
2759 if (guid_to_name(hdl, zc.zc_name, drrb->drr_fromguid,
2760 zc.zc_value) == 0) {
2761 *strchr(zc.zc_value, '@') = '\0';
2762 (void) strcat(zc.zc_value, snap);
2767 (void) strcpy(zc.zc_name, zc.zc_value);
2768 *strchr(zc.zc_name, '@') = '\0';
2770 if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
2774 * Destination fs exists. Therefore this should either
2775 * be an incremental, or the stream specifies a new fs
2776 * (full stream or clone) and they want us to blow it
2777 * away (and have therefore specified -F and removed any
2780 if (stream_wantsnewfs) {
2781 if (!flags->force) {
2782 zcmd_free_nvlists(&zc);
2783 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2784 "destination '%s' exists\n"
2785 "must specify -F to overwrite it"),
2787 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2789 if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT,
2791 zcmd_free_nvlists(&zc);
2792 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2793 "destination has snapshots (eg. %s)\n"
2794 "must destroy them to overwrite it"),
2796 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2800 if ((zhp = zfs_open(hdl, zc.zc_name,
2801 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) == NULL) {
2802 zcmd_free_nvlists(&zc);
2806 if (stream_wantsnewfs &&
2807 zhp->zfs_dmustats.dds_origin[0]) {
2808 zcmd_free_nvlists(&zc);
2810 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2811 "destination '%s' is a clone\n"
2812 "must destroy it to overwrite it"),
2814 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2817 if (!flags->dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
2818 stream_wantsnewfs) {
2819 /* We can't do online recv in this case */
2820 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0);
2823 zcmd_free_nvlists(&zc);
2826 if (changelist_prefix(clp) != 0) {
2827 changelist_free(clp);
2829 zcmd_free_nvlists(&zc);
2836 * Destination filesystem does not exist. Therefore we better
2837 * be creating a new filesystem (either from a full backup, or
2838 * a clone). It would therefore be invalid if the user
2839 * specified only the pool name (i.e. if the destination name
2840 * contained no slash character).
2842 if (!stream_wantsnewfs ||
2843 (cp = strrchr(zc.zc_name, '/')) == NULL) {
2844 zcmd_free_nvlists(&zc);
2845 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2846 "destination '%s' does not exist"), zc.zc_name);
2847 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2851 * Trim off the final dataset component so we perform the
2852 * recvbackup ioctl to the filesystems's parent.
2856 if (flags->isprefix && !flags->istail && !flags->dryrun &&
2857 create_parents(hdl, zc.zc_value, strlen(tosnap)) != 0) {
2858 zcmd_free_nvlists(&zc);
2859 return (zfs_error(hdl, EZFS_BADRESTORE, errbuf));
2865 zc.zc_begin_record = drr_noswap->drr_u.drr_begin;
2866 zc.zc_cookie = infd;
2867 zc.zc_guid = flags->force;
2868 if (flags->verbose) {
2869 (void) printf("%s %s stream of %s into %s\n",
2870 flags->dryrun ? "would receive" : "receiving",
2871 drrb->drr_fromguid ? "incremental" : "full",
2872 drrb->drr_toname, zc.zc_value);
2873 (void) fflush(stdout);
2876 if (flags->dryrun) {
2877 zcmd_free_nvlists(&zc);
2878 return (recv_skip(hdl, infd, flags->byteswap));
2881 zc.zc_nvlist_dst = (uint64_t)(uintptr_t)prop_errbuf;
2882 zc.zc_nvlist_dst_size = sizeof (prop_errbuf);
2883 zc.zc_cleanup_fd = cleanup_fd;
2884 zc.zc_action_handle = *action_handlep;
2886 err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc);
2887 ioctl_errno = errno;
2888 prop_errflags = (zprop_errflags_t)zc.zc_obj;
2891 nvlist_t *prop_errors;
2892 VERIFY(0 == nvlist_unpack((void *)(uintptr_t)zc.zc_nvlist_dst,
2893 zc.zc_nvlist_dst_size, &prop_errors, 0));
2895 nvpair_t *prop_err = NULL;
2897 while ((prop_err = nvlist_next_nvpair(prop_errors,
2898 prop_err)) != NULL) {
2903 prop = zfs_name_to_prop(nvpair_name(prop_err));
2904 (void) nvpair_value_int32(prop_err, &intval);
2905 if (strcmp(nvpair_name(prop_err),
2906 ZPROP_N_MORE_ERRORS) == 0) {
2907 trunc_prop_errs(intval);
2910 (void) snprintf(tbuf, sizeof (tbuf),
2911 dgettext(TEXT_DOMAIN,
2912 "cannot receive %s property on %s"),
2913 nvpair_name(prop_err), zc.zc_name);
2914 zfs_setprop_error(hdl, prop, intval, tbuf);
2917 nvlist_free(prop_errors);
2920 zc.zc_nvlist_dst = 0;
2921 zc.zc_nvlist_dst_size = 0;
2922 zcmd_free_nvlists(&zc);
2924 if (err == 0 && snapprops_nvlist) {
2925 zfs_cmd_t zc2 = { 0 };
2927 (void) strcpy(zc2.zc_name, zc.zc_value);
2928 zc2.zc_cookie = B_TRUE; /* received */
2929 if (zcmd_write_src_nvlist(hdl, &zc2, snapprops_nvlist) == 0) {
2930 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc2);
2931 zcmd_free_nvlists(&zc2);
2935 if (err && (ioctl_errno == ENOENT || ioctl_errno == EEXIST)) {
2937 * It may be that this snapshot already exists,
2938 * in which case we want to consume & ignore it
2939 * rather than failing.
2941 avl_tree_t *local_avl;
2942 nvlist_t *local_nv, *fs;
2943 cp = strchr(zc.zc_value, '@');
2946 * XXX Do this faster by just iterating over snaps in
2947 * this fs. Also if zc_value does not exist, we will
2948 * get a strange "does not exist" error message.
2951 if (gather_nvlist(hdl, zc.zc_value, NULL, NULL, B_FALSE,
2952 &local_nv, &local_avl) == 0) {
2954 fs = fsavl_find(local_avl, drrb->drr_toguid, NULL);
2955 fsavl_destroy(local_avl);
2956 nvlist_free(local_nv);
2959 if (flags->verbose) {
2960 (void) printf("snap %s already exists; "
2961 "ignoring\n", zc.zc_value);
2963 err = ioctl_err = recv_skip(hdl, infd,
2970 if (ioctl_err != 0) {
2971 switch (ioctl_errno) {
2973 cp = strchr(zc.zc_value, '@');
2975 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2976 "most recent snapshot of %s does not\n"
2977 "match incremental source"), zc.zc_value);
2978 (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf);
2982 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2983 "destination %s has been modified\n"
2984 "since most recent snapshot"), zc.zc_name);
2985 (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf);
2988 cp = strchr(zc.zc_value, '@');
2990 /* it's the containing fs that exists */
2993 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2994 "destination already exists"));
2995 (void) zfs_error_fmt(hdl, EZFS_EXISTS,
2996 dgettext(TEXT_DOMAIN, "cannot restore to %s"),
3001 (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
3004 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3005 "invalid stream (checksum mismatch)"));
3006 (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
3009 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3010 "pool must be upgraded to receive this stream."));
3011 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
3014 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3015 "destination %s space quota exceeded"), zc.zc_name);
3016 (void) zfs_error(hdl, EZFS_NOSPC, errbuf);
3019 (void) zfs_standard_error(hdl, ioctl_errno, errbuf);
3024 * Mount the target filesystem (if created). Also mount any
3025 * children of the target filesystem if we did a replication
3026 * receive (indicated by stream_avl being non-NULL).
3028 cp = strchr(zc.zc_value, '@');
3029 if (cp && (ioctl_err == 0 || !newfs)) {
3033 h = zfs_open(hdl, zc.zc_value,
3034 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3036 if (h->zfs_type == ZFS_TYPE_VOLUME) {
3038 } else if (newfs || stream_avl) {
3040 * Track the first/top of hierarchy fs,
3041 * for mounting and sharing later.
3043 if (top_zfs && *top_zfs == NULL)
3044 *top_zfs = zfs_strdup(hdl, zc.zc_value);
3052 err |= changelist_postfix(clp);
3053 changelist_free(clp);
3056 if (prop_errflags & ZPROP_ERR_NOCLEAR) {
3057 (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: "
3058 "failed to clear unreceived properties on %s"),
3060 (void) fprintf(stderr, "\n");
3062 if (prop_errflags & ZPROP_ERR_NORESTORE) {
3063 (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: "
3064 "failed to restore original properties on %s"),
3066 (void) fprintf(stderr, "\n");
3069 if (err || ioctl_err)
3072 *action_handlep = zc.zc_action_handle;
3074 if (flags->verbose) {
3077 uint64_t bytes = zc.zc_cookie;
3078 time_t delta = time(NULL) - begin_time;
3081 zfs_nicenum(bytes, buf1, sizeof (buf1));
3082 zfs_nicenum(bytes/delta, buf2, sizeof (buf1));
3084 (void) printf("received %sB stream in %lu seconds (%sB/sec)\n",
3092 zfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap, recvflags_t *flags,
3093 int infd, const char *sendfs, nvlist_t *stream_nv, avl_tree_t *stream_avl,
3094 char **top_zfs, int cleanup_fd, uint64_t *action_handlep)
3097 dmu_replay_record_t drr, drr_noswap;
3098 struct drr_begin *drrb = &drr.drr_u.drr_begin;
3100 zio_cksum_t zcksum = { 0 };
3101 uint64_t featureflags;
3104 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3107 if (flags->isprefix &&
3108 !zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) {
3109 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs "
3110 "(%s) does not exist"), tosnap);
3111 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3114 /* read in the BEGIN record */
3115 if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE,
3119 if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) {
3120 /* It's the double end record at the end of a package */
3124 /* the kernel needs the non-byteswapped begin record */
3127 flags->byteswap = B_FALSE;
3128 if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) {
3130 * We computed the checksum in the wrong byteorder in
3131 * recv_read() above; do it again correctly.
3133 bzero(&zcksum, sizeof (zio_cksum_t));
3134 fletcher_4_incremental_byteswap(&drr, sizeof (drr), &zcksum);
3135 flags->byteswap = B_TRUE;
3137 drr.drr_type = BSWAP_32(drr.drr_type);
3138 drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen);
3139 drrb->drr_magic = BSWAP_64(drrb->drr_magic);
3140 drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
3141 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
3142 drrb->drr_type = BSWAP_32(drrb->drr_type);
3143 drrb->drr_flags = BSWAP_32(drrb->drr_flags);
3144 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
3145 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
3148 if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) {
3149 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
3150 "stream (bad magic number)"));
3151 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
3154 featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
3155 hdrtype = DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo);
3157 if (!DMU_STREAM_SUPPORTED(featureflags) ||
3158 (hdrtype != DMU_SUBSTREAM && hdrtype != DMU_COMPOUNDSTREAM)) {
3159 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3160 "stream has unsupported feature, feature flags = %lx"),
3162 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
3165 if (strchr(drrb->drr_toname, '@') == NULL) {
3166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid "
3167 "stream (bad snapshot name)"));
3168 return (zfs_error(hdl, EZFS_BADSTREAM, errbuf));
3171 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == DMU_SUBSTREAM) {
3172 char nonpackage_sendfs[ZFS_MAXNAMELEN];
3173 if (sendfs == NULL) {
3175 * We were not called from zfs_receive_package(). Get
3176 * the fs specified by 'zfs send'.
3179 (void) strlcpy(nonpackage_sendfs,
3180 drr.drr_u.drr_begin.drr_toname, ZFS_MAXNAMELEN);
3181 if ((cp = strchr(nonpackage_sendfs, '@')) != NULL)
3183 sendfs = nonpackage_sendfs;
3185 return (zfs_receive_one(hdl, infd, tosnap, flags,
3186 &drr, &drr_noswap, sendfs, stream_nv, stream_avl,
3187 top_zfs, cleanup_fd, action_handlep));
3189 assert(DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
3190 DMU_COMPOUNDSTREAM);
3191 return (zfs_receive_package(hdl, infd, tosnap, flags,
3192 &drr, &zcksum, top_zfs, cleanup_fd, action_handlep));
3197 * Restores a backup of tosnap from the file descriptor specified by infd.
3198 * Return 0 on total success, -2 if some things couldn't be
3199 * destroyed/renamed/promoted, -1 if some things couldn't be received.
3200 * (-1 will override -2).
3203 zfs_receive(libzfs_handle_t *hdl, const char *tosnap, recvflags_t *flags,
3204 int infd, avl_tree_t *stream_avl)
3206 char *top_zfs = NULL;
3209 uint64_t action_handle = 0;
3211 cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL);
3212 VERIFY(cleanup_fd >= 0);
3214 err = zfs_receive_impl(hdl, tosnap, flags, infd, NULL, NULL,
3215 stream_avl, &top_zfs, cleanup_fd, &action_handle);
3217 VERIFY(0 == close(cleanup_fd));
3219 if (err == 0 && !flags->nomount && top_zfs) {
3221 prop_changelist_t *clp;
3223 zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM);
3225 clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT,
3226 CL_GATHER_MOUNT_ALWAYS, 0);
3229 /* mount and share received datasets */
3230 err = changelist_postfix(clp);
3231 changelist_free(clp);
3234 if (zhp == NULL || clp == NULL || err)