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) 2011, 2015 by Delphix. All rights reserved.
25 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
28 * Copyright (c) 2013 Steven Hartland. All rights reserved.
29 * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
42 #include <sys/mount.h>
43 #include <sys/mntent.h>
44 #include <sys/mnttab.h>
46 #include <sys/debug.h>
54 #include <libzfs_core.h>
56 #include "zfs_namecheck.h"
58 #include "zfs_fletcher.h"
59 #include "libzfs_impl.h"
61 #include <sys/zio_checksum.h>
63 #include <sys/socket.h>
65 /* in libzfs_dataset.c */
66 extern void zfs_setprop_error(libzfs_handle_t
*, zfs_prop_t
, int, char *);
68 static int zfs_receive_impl(libzfs_handle_t
*, const char *, const char *,
69 recvflags_t
*, int, const char *, nvlist_t
*, avl_tree_t
*, char **, int,
70 uint64_t *, const char *);
71 static int guid_to_name(libzfs_handle_t
*, const char *,
72 uint64_t, boolean_t
, char *);
74 static const zio_cksum_t zero_cksum
= { { 0 } };
76 typedef struct dedup_arg
{
79 libzfs_handle_t
*dedup_hdl
;
82 typedef struct progress_arg
{
85 boolean_t pa_parsable
;
88 typedef struct dataref
{
94 typedef struct dedup_entry
{
95 struct dedup_entry
*dde_next
;
96 zio_cksum_t dde_chksum
;
101 #define MAX_DDT_PHYSMEM_PERCENT 20
102 #define SMALLEST_POSSIBLE_MAX_DDT_MB 128
104 typedef struct dedup_table
{
105 dedup_entry_t
**dedup_hash_array
;
106 umem_cache_t
*ddecache
;
107 uint64_t max_ddt_size
; /* max dedup table size in bytes */
108 uint64_t cur_ddt_size
; /* current dedup table size in bytes */
115 high_order_bit(uint64_t n
)
119 for (count
= 0; n
!= 0; count
++)
125 ssread(void *buf
, size_t len
, FILE *stream
)
129 if ((outlen
= fread(buf
, len
, 1, stream
)) == 0)
136 ddt_hash_append(libzfs_handle_t
*hdl
, dedup_table_t
*ddt
, dedup_entry_t
**ddepp
,
137 zio_cksum_t
*cs
, uint64_t prop
, dataref_t
*dr
)
141 if (ddt
->cur_ddt_size
>= ddt
->max_ddt_size
) {
142 if (ddt
->ddt_full
== B_FALSE
) {
143 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
144 "Dedup table full. Deduplication will continue "
145 "with existing table entries"));
146 ddt
->ddt_full
= B_TRUE
;
151 if ((dde
= umem_cache_alloc(ddt
->ddecache
, UMEM_DEFAULT
))
153 assert(*ddepp
== NULL
);
154 dde
->dde_next
= NULL
;
155 dde
->dde_chksum
= *cs
;
156 dde
->dde_prop
= prop
;
159 ddt
->cur_ddt_size
+= sizeof (dedup_entry_t
);
165 * Using the specified dedup table, do a lookup for an entry with
166 * the checksum cs. If found, return the block's reference info
167 * in *dr. Otherwise, insert a new entry in the dedup table, using
168 * the reference information specified by *dr.
170 * return value: true - entry was found
171 * false - entry was not found
174 ddt_update(libzfs_handle_t
*hdl
, dedup_table_t
*ddt
, zio_cksum_t
*cs
,
175 uint64_t prop
, dataref_t
*dr
)
178 dedup_entry_t
**ddepp
;
180 hashcode
= BF64_GET(cs
->zc_word
[0], 0, ddt
->numhashbits
);
182 for (ddepp
= &(ddt
->dedup_hash_array
[hashcode
]); *ddepp
!= NULL
;
183 ddepp
= &((*ddepp
)->dde_next
)) {
184 if (ZIO_CHECKSUM_EQUAL(((*ddepp
)->dde_chksum
), *cs
) &&
185 (*ddepp
)->dde_prop
== prop
) {
186 *dr
= (*ddepp
)->dde_ref
;
190 ddt_hash_append(hdl
, ddt
, ddepp
, cs
, prop
, dr
);
195 dump_record(dmu_replay_record_t
*drr
, void *payload
, int payload_len
,
196 zio_cksum_t
*zc
, int outfd
)
198 ASSERT3U(offsetof(dmu_replay_record_t
, drr_u
.drr_checksum
.drr_checksum
),
199 ==, sizeof (dmu_replay_record_t
) - sizeof (zio_cksum_t
));
200 fletcher_4_incremental_native(drr
,
201 offsetof(dmu_replay_record_t
, drr_u
.drr_checksum
.drr_checksum
), zc
);
202 if (drr
->drr_type
!= DRR_BEGIN
) {
203 ASSERT(ZIO_CHECKSUM_IS_ZERO(&drr
->drr_u
.
204 drr_checksum
.drr_checksum
));
205 drr
->drr_u
.drr_checksum
.drr_checksum
= *zc
;
207 fletcher_4_incremental_native(&drr
->drr_u
.drr_checksum
.drr_checksum
,
208 sizeof (zio_cksum_t
), zc
);
209 if (write(outfd
, drr
, sizeof (*drr
)) == -1)
211 if (payload_len
!= 0) {
212 fletcher_4_incremental_native(payload
, payload_len
, zc
);
213 if (write(outfd
, payload
, payload_len
) == -1)
220 * This function is started in a separate thread when the dedup option
221 * has been requested. The main send thread determines the list of
222 * snapshots to be included in the send stream and makes the ioctl calls
223 * for each one. But instead of having the ioctl send the output to the
224 * the output fd specified by the caller of zfs_send()), the
225 * ioctl is told to direct the output to a pipe, which is read by the
226 * alternate thread running THIS function. This function does the
228 * 1. building a dedup table (the DDT)
229 * 2. doing checksums on each data block and inserting a record in the DDT
230 * 3. looking for matching checksums, and
231 * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever
232 * a duplicate block is found.
233 * The output of this function then goes to the output fd requested
234 * by the caller of zfs_send().
239 dedup_arg_t
*dda
= arg
;
240 char *buf
= zfs_alloc(dda
->dedup_hdl
, SPA_MAXBLOCKSIZE
);
241 dmu_replay_record_t thedrr
= { 0 };
242 dmu_replay_record_t
*drr
= &thedrr
;
246 zio_cksum_t stream_cksum
;
247 uint64_t physmem
= sysconf(_SC_PHYS_PAGES
) * sysconf(_SC_PAGESIZE
);
251 MAX((physmem
* MAX_DDT_PHYSMEM_PERCENT
) / 100,
252 SMALLEST_POSSIBLE_MAX_DDT_MB
<< 20);
254 numbuckets
= ddt
.max_ddt_size
/ (sizeof (dedup_entry_t
));
257 * numbuckets must be a power of 2. Increase number to
258 * a power of 2 if necessary.
260 if (!ISP2(numbuckets
))
261 numbuckets
= 1 << high_order_bit(numbuckets
);
263 ddt
.dedup_hash_array
= calloc(numbuckets
, sizeof (dedup_entry_t
*));
264 ddt
.ddecache
= umem_cache_create("dde", sizeof (dedup_entry_t
), 0,
265 NULL
, NULL
, NULL
, NULL
, NULL
, 0);
266 ddt
.cur_ddt_size
= numbuckets
* sizeof (dedup_entry_t
*);
267 ddt
.numhashbits
= high_order_bit(numbuckets
) - 1;
268 ddt
.ddt_full
= B_FALSE
;
270 outfd
= dda
->outputfd
;
271 ofp
= fdopen(dda
->inputfd
, "r");
272 while (ssread(drr
, sizeof (*drr
), ofp
) != 0) {
274 switch (drr
->drr_type
) {
277 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
280 ZIO_SET_CHECKSUM(&stream_cksum
, 0, 0, 0, 0);
282 ASSERT3U(drrb
->drr_magic
, ==, DMU_BACKUP_MAGIC
);
284 /* set the DEDUP feature flag for this stream */
285 fflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
286 fflags
|= (DMU_BACKUP_FEATURE_DEDUP
|
287 DMU_BACKUP_FEATURE_DEDUPPROPS
);
288 DMU_SET_FEATUREFLAGS(drrb
->drr_versioninfo
, fflags
);
290 if (drr
->drr_payloadlen
!= 0) {
291 sz
= drr
->drr_payloadlen
;
293 if (sz
> SPA_MAXBLOCKSIZE
) {
294 buf
= zfs_realloc(dda
->dedup_hdl
, buf
,
295 SPA_MAXBLOCKSIZE
, sz
);
297 (void) ssread(buf
, sz
, ofp
);
301 if (dump_record(drr
, buf
, sz
, &stream_cksum
,
309 struct drr_end
*drre
= &drr
->drr_u
.drr_end
;
310 /* use the recalculated checksum */
311 drre
->drr_checksum
= stream_cksum
;
312 if (dump_record(drr
, NULL
, 0, &stream_cksum
,
320 struct drr_object
*drro
= &drr
->drr_u
.drr_object
;
321 if (drro
->drr_bonuslen
> 0) {
323 P2ROUNDUP((uint64_t)drro
->drr_bonuslen
, 8),
326 if (dump_record(drr
, buf
,
327 P2ROUNDUP((uint64_t)drro
->drr_bonuslen
, 8),
328 &stream_cksum
, outfd
) != 0)
335 struct drr_spill
*drrs
= &drr
->drr_u
.drr_spill
;
336 (void) ssread(buf
, drrs
->drr_length
, ofp
);
337 if (dump_record(drr
, buf
, drrs
->drr_length
,
338 &stream_cksum
, outfd
) != 0)
343 case DRR_FREEOBJECTS
:
345 if (dump_record(drr
, NULL
, 0, &stream_cksum
,
353 struct drr_write
*drrw
= &drr
->drr_u
.drr_write
;
356 (void) ssread(buf
, drrw
->drr_length
, ofp
);
359 * Use the existing checksum if it's dedup-capable,
360 * else calculate a SHA256 checksum for it.
363 if (ZIO_CHECKSUM_EQUAL(drrw
->drr_key
.ddk_cksum
,
365 !DRR_IS_DEDUP_CAPABLE(drrw
->drr_checksumflags
)) {
366 zio_cksum_t tmpsha256
;
368 zio_checksum_SHA256(buf
,
369 drrw
->drr_length
, &tmpsha256
);
371 drrw
->drr_key
.ddk_cksum
.zc_word
[0] =
372 BE_64(tmpsha256
.zc_word
[0]);
373 drrw
->drr_key
.ddk_cksum
.zc_word
[1] =
374 BE_64(tmpsha256
.zc_word
[1]);
375 drrw
->drr_key
.ddk_cksum
.zc_word
[2] =
376 BE_64(tmpsha256
.zc_word
[2]);
377 drrw
->drr_key
.ddk_cksum
.zc_word
[3] =
378 BE_64(tmpsha256
.zc_word
[3]);
379 drrw
->drr_checksumtype
= ZIO_CHECKSUM_SHA256
;
380 drrw
->drr_checksumflags
= DRR_CHECKSUM_DEDUP
;
383 dataref
.ref_guid
= drrw
->drr_toguid
;
384 dataref
.ref_object
= drrw
->drr_object
;
385 dataref
.ref_offset
= drrw
->drr_offset
;
387 if (ddt_update(dda
->dedup_hdl
, &ddt
,
388 &drrw
->drr_key
.ddk_cksum
, drrw
->drr_key
.ddk_prop
,
390 dmu_replay_record_t wbr_drr
= {0};
391 struct drr_write_byref
*wbr_drrr
=
392 &wbr_drr
.drr_u
.drr_write_byref
;
394 /* block already present in stream */
395 wbr_drr
.drr_type
= DRR_WRITE_BYREF
;
397 wbr_drrr
->drr_object
= drrw
->drr_object
;
398 wbr_drrr
->drr_offset
= drrw
->drr_offset
;
399 wbr_drrr
->drr_length
= drrw
->drr_length
;
400 wbr_drrr
->drr_toguid
= drrw
->drr_toguid
;
401 wbr_drrr
->drr_refguid
= dataref
.ref_guid
;
402 wbr_drrr
->drr_refobject
=
404 wbr_drrr
->drr_refoffset
=
407 wbr_drrr
->drr_checksumtype
=
408 drrw
->drr_checksumtype
;
409 wbr_drrr
->drr_checksumflags
=
410 drrw
->drr_checksumtype
;
411 wbr_drrr
->drr_key
.ddk_cksum
=
412 drrw
->drr_key
.ddk_cksum
;
413 wbr_drrr
->drr_key
.ddk_prop
=
414 drrw
->drr_key
.ddk_prop
;
416 if (dump_record(&wbr_drr
, NULL
, 0,
417 &stream_cksum
, outfd
) != 0)
420 /* block not previously seen */
421 if (dump_record(drr
, buf
, drrw
->drr_length
,
422 &stream_cksum
, outfd
) != 0)
428 case DRR_WRITE_EMBEDDED
:
430 struct drr_write_embedded
*drrwe
=
431 &drr
->drr_u
.drr_write_embedded
;
433 P2ROUNDUP((uint64_t)drrwe
->drr_psize
, 8), ofp
);
434 if (dump_record(drr
, buf
,
435 P2ROUNDUP((uint64_t)drrwe
->drr_psize
, 8),
436 &stream_cksum
, outfd
) != 0)
443 if (dump_record(drr
, NULL
, 0, &stream_cksum
,
450 (void) fprintf(stderr
, "INVALID record type 0x%x\n",
452 /* should never happen, so assert */
457 umem_cache_destroy(ddt
.ddecache
);
458 free(ddt
.dedup_hash_array
);
466 * Routines for dealing with the AVL tree of fs-nvlists
468 typedef struct fsavl_node
{
476 fsavl_compare(const void *arg1
, const void *arg2
)
478 const fsavl_node_t
*fn1
= arg1
;
479 const fsavl_node_t
*fn2
= arg2
;
481 if (fn1
->fn_guid
> fn2
->fn_guid
)
483 else if (fn1
->fn_guid
< fn2
->fn_guid
)
490 * Given the GUID of a snapshot, find its containing filesystem and
494 fsavl_find(avl_tree_t
*avl
, uint64_t snapguid
, char **snapname
)
496 fsavl_node_t fn_find
;
499 fn_find
.fn_guid
= snapguid
;
501 fn
= avl_find(avl
, &fn_find
, NULL
);
504 *snapname
= fn
->fn_snapname
;
505 return (fn
->fn_nvfs
);
511 fsavl_destroy(avl_tree_t
*avl
)
520 while ((fn
= avl_destroy_nodes(avl
, &cookie
)) != NULL
)
527 * Given an nvlist, produce an avl tree of snapshots, ordered by guid
530 fsavl_create(nvlist_t
*fss
)
533 nvpair_t
*fselem
= NULL
;
535 if ((fsavl
= malloc(sizeof (avl_tree_t
))) == NULL
)
538 avl_create(fsavl
, fsavl_compare
, sizeof (fsavl_node_t
),
539 offsetof(fsavl_node_t
, fn_node
));
541 while ((fselem
= nvlist_next_nvpair(fss
, fselem
)) != NULL
) {
542 nvlist_t
*nvfs
, *snaps
;
543 nvpair_t
*snapelem
= NULL
;
545 VERIFY(0 == nvpair_value_nvlist(fselem
, &nvfs
));
546 VERIFY(0 == nvlist_lookup_nvlist(nvfs
, "snaps", &snaps
));
549 nvlist_next_nvpair(snaps
, snapelem
)) != NULL
) {
553 VERIFY(0 == nvpair_value_uint64(snapelem
, &guid
));
554 if ((fn
= malloc(sizeof (fsavl_node_t
))) == NULL
) {
555 fsavl_destroy(fsavl
);
559 fn
->fn_snapname
= nvpair_name(snapelem
);
563 * Note: if there are multiple snaps with the
564 * same GUID, we ignore all but one.
566 if (avl_find(fsavl
, fn
, NULL
) == NULL
)
577 * Routines for dealing with the giant nvlist of fs-nvlists, etc.
579 typedef struct send_data
{
580 uint64_t parent_fromsnap_guid
;
581 nvlist_t
*parent_snaps
;
584 const char *fromsnap
;
591 * The header nvlist is of the following format:
594 * "fromsnap" -> string (if incremental)
598 * "name" -> string (full name; for debugging)
599 * "parentfromsnap" -> number (guid of fromsnap in parent)
601 * "props" -> { name -> value (only if set here) }
602 * "snaps" -> { name (lastname) -> number (guid) }
603 * "snapprops" -> { name (lastname) -> { name -> value } }
605 * "origin" -> number (guid) (if clone)
606 * "sent" -> boolean (not on-disk)
614 static void send_iterate_prop(zfs_handle_t
*zhp
, nvlist_t
*nv
);
617 send_iterate_snap(zfs_handle_t
*zhp
, void *arg
)
619 send_data_t
*sd
= arg
;
620 uint64_t guid
= zhp
->zfs_dmustats
.dds_guid
;
623 boolean_t isfromsnap
, istosnap
, istosnapwithnofrom
;
625 snapname
= strrchr(zhp
->zfs_name
, '@')+1;
626 isfromsnap
= (sd
->fromsnap
!= NULL
&&
627 strcmp(sd
->fromsnap
, snapname
) == 0);
628 istosnap
= (sd
->tosnap
!= NULL
&& (strcmp(sd
->tosnap
, snapname
) == 0));
629 istosnapwithnofrom
= (istosnap
&& sd
->fromsnap
== NULL
);
631 VERIFY(0 == nvlist_add_uint64(sd
->parent_snaps
, snapname
, guid
));
633 * NB: if there is no fromsnap here (it's a newly created fs in
634 * an incremental replication), we will substitute the tosnap.
636 if (isfromsnap
|| (sd
->parent_fromsnap_guid
== 0 && istosnap
)) {
637 sd
->parent_fromsnap_guid
= guid
;
640 if (!sd
->recursive
) {
641 if (!sd
->seenfrom
&& isfromsnap
) {
642 sd
->seenfrom
= B_TRUE
;
647 if ((sd
->seento
|| !sd
->seenfrom
) && !istosnapwithnofrom
) {
656 VERIFY(0 == nvlist_alloc(&nv
, NV_UNIQUE_NAME
, 0));
657 send_iterate_prop(zhp
, nv
);
658 VERIFY(0 == nvlist_add_nvlist(sd
->snapprops
, snapname
, nv
));
666 send_iterate_prop(zfs_handle_t
*zhp
, nvlist_t
*nv
)
668 nvpair_t
*elem
= NULL
;
670 while ((elem
= nvlist_next_nvpair(zhp
->zfs_props
, elem
)) != NULL
) {
671 char *propname
= nvpair_name(elem
);
672 zfs_prop_t prop
= zfs_name_to_prop(propname
);
675 if (!zfs_prop_user(propname
)) {
677 * Realistically, this should never happen. However,
678 * we want the ability to add DSL properties without
679 * needing to make incompatible version changes. We
680 * need to ignore unknown properties to allow older
681 * software to still send datasets containing these
682 * properties, with the unknown properties elided.
684 if (prop
== ZPROP_INVAL
)
687 if (zfs_prop_readonly(prop
))
691 verify(nvpair_value_nvlist(elem
, &propnv
) == 0);
692 if (prop
== ZFS_PROP_QUOTA
|| prop
== ZFS_PROP_RESERVATION
||
693 prop
== ZFS_PROP_REFQUOTA
||
694 prop
== ZFS_PROP_REFRESERVATION
) {
697 verify(nvlist_lookup_uint64(propnv
,
698 ZPROP_VALUE
, &value
) == 0);
699 if (zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
)
702 * May have no source before SPA_VERSION_RECVD_PROPS,
703 * but is still modifiable.
705 if (nvlist_lookup_string(propnv
,
706 ZPROP_SOURCE
, &source
) == 0) {
707 if ((strcmp(source
, zhp
->zfs_name
) != 0) &&
709 ZPROP_SOURCE_VAL_RECVD
) != 0))
714 if (nvlist_lookup_string(propnv
,
715 ZPROP_SOURCE
, &source
) != 0)
717 if ((strcmp(source
, zhp
->zfs_name
) != 0) &&
718 (strcmp(source
, ZPROP_SOURCE_VAL_RECVD
) != 0))
722 if (zfs_prop_user(propname
) ||
723 zfs_prop_get_type(prop
) == PROP_TYPE_STRING
) {
725 verify(nvlist_lookup_string(propnv
,
726 ZPROP_VALUE
, &value
) == 0);
727 VERIFY(0 == nvlist_add_string(nv
, propname
, value
));
730 verify(nvlist_lookup_uint64(propnv
,
731 ZPROP_VALUE
, &value
) == 0);
732 VERIFY(0 == nvlist_add_uint64(nv
, propname
, value
));
738 * recursively generate nvlists describing datasets. See comment
739 * for the data structure send_data_t above for description of contents
743 send_iterate_fs(zfs_handle_t
*zhp
, void *arg
)
745 send_data_t
*sd
= arg
;
748 uint64_t parent_fromsnap_guid_save
= sd
->parent_fromsnap_guid
;
749 uint64_t guid
= zhp
->zfs_dmustats
.dds_guid
;
752 VERIFY(0 == nvlist_alloc(&nvfs
, NV_UNIQUE_NAME
, 0));
753 VERIFY(0 == nvlist_add_string(nvfs
, "name", zhp
->zfs_name
));
754 VERIFY(0 == nvlist_add_uint64(nvfs
, "parentfromsnap",
755 sd
->parent_fromsnap_guid
));
757 if (zhp
->zfs_dmustats
.dds_origin
[0]) {
758 zfs_handle_t
*origin
= zfs_open(zhp
->zfs_hdl
,
759 zhp
->zfs_dmustats
.dds_origin
, ZFS_TYPE_SNAPSHOT
);
762 VERIFY(0 == nvlist_add_uint64(nvfs
, "origin",
763 origin
->zfs_dmustats
.dds_guid
));
766 /* iterate over props */
767 VERIFY(0 == nvlist_alloc(&nv
, NV_UNIQUE_NAME
, 0));
768 send_iterate_prop(zhp
, nv
);
769 VERIFY(0 == nvlist_add_nvlist(nvfs
, "props", nv
));
772 /* iterate over snaps, and set sd->parent_fromsnap_guid */
773 sd
->parent_fromsnap_guid
= 0;
774 VERIFY(0 == nvlist_alloc(&sd
->parent_snaps
, NV_UNIQUE_NAME
, 0));
775 VERIFY(0 == nvlist_alloc(&sd
->snapprops
, NV_UNIQUE_NAME
, 0));
776 (void) zfs_iter_snapshots_sorted(zhp
, send_iterate_snap
, sd
);
777 VERIFY(0 == nvlist_add_nvlist(nvfs
, "snaps", sd
->parent_snaps
));
778 VERIFY(0 == nvlist_add_nvlist(nvfs
, "snapprops", sd
->snapprops
));
779 nvlist_free(sd
->parent_snaps
);
780 nvlist_free(sd
->snapprops
);
782 /* add this fs to nvlist */
783 (void) snprintf(guidstring
, sizeof (guidstring
),
784 "0x%llx", (longlong_t
)guid
);
785 VERIFY(0 == nvlist_add_nvlist(sd
->fss
, guidstring
, nvfs
));
788 /* iterate over children */
790 rv
= zfs_iter_filesystems(zhp
, send_iterate_fs
, sd
);
792 sd
->parent_fromsnap_guid
= parent_fromsnap_guid_save
;
799 gather_nvlist(libzfs_handle_t
*hdl
, const char *fsname
, const char *fromsnap
,
800 const char *tosnap
, boolean_t recursive
, nvlist_t
**nvlp
, avl_tree_t
**avlp
)
803 send_data_t sd
= { 0 };
806 zhp
= zfs_open(hdl
, fsname
, ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
808 return (EZFS_BADTYPE
);
810 VERIFY(0 == nvlist_alloc(&sd
.fss
, NV_UNIQUE_NAME
, 0));
811 sd
.fromsnap
= fromsnap
;
813 sd
.recursive
= recursive
;
815 if ((error
= send_iterate_fs(zhp
, &sd
)) != 0) {
823 if (avlp
!= NULL
&& (*avlp
= fsavl_create(sd
.fss
)) == NULL
) {
834 * Routines specific to "zfs send"
836 typedef struct send_dump_data
{
837 /* these are all just the short snapname (the part after the @) */
838 const char *fromsnap
;
840 char prevsnap
[ZFS_MAX_DATASET_NAME_LEN
];
841 uint64_t prevsnap_obj
;
842 boolean_t seenfrom
, seento
, replicate
, doall
, fromorigin
;
843 boolean_t verbose
, dryrun
, parsable
, progress
, embed_data
, std_out
;
844 boolean_t large_block
;
850 snapfilter_cb_t
*filter_cb
;
853 char holdtag
[ZFS_MAX_DATASET_NAME_LEN
];
859 estimate_ioctl(zfs_handle_t
*zhp
, uint64_t fromsnap_obj
,
860 boolean_t fromorigin
, uint64_t *sizep
)
862 zfs_cmd_t zc
= {"\0"};
863 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
865 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
866 assert(fromsnap_obj
== 0 || !fromorigin
);
868 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
869 zc
.zc_obj
= fromorigin
;
870 zc
.zc_sendobj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
871 zc
.zc_fromobj
= fromsnap_obj
;
872 zc
.zc_guid
= 1; /* estimate flag */
874 if (zfs_ioctl(zhp
->zfs_hdl
, ZFS_IOC_SEND
, &zc
) != 0) {
876 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
877 "warning: cannot estimate space for '%s'"), zhp
->zfs_name
);
881 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
882 "not an earlier snapshot from the same fs"));
883 return (zfs_error(hdl
, EZFS_CROSSTARGET
, errbuf
));
886 if (zfs_dataset_exists(hdl
, zc
.zc_name
,
887 ZFS_TYPE_SNAPSHOT
)) {
888 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
889 "incremental source (@%s) does not exist"),
892 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
905 zfs_error_aux(hdl
, strerror(errno
));
906 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
909 return (zfs_standard_error(hdl
, errno
, errbuf
));
913 *sizep
= zc
.zc_objset_type
;
919 * Dumps a backup of the given snapshot (incremental from fromsnap if it's not
920 * NULL) to the file descriptor specified by outfd.
923 dump_ioctl(zfs_handle_t
*zhp
, const char *fromsnap
, uint64_t fromsnap_obj
,
924 boolean_t fromorigin
, int outfd
, enum lzc_send_flags flags
,
927 zfs_cmd_t zc
= {"\0"};
928 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
931 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
932 assert(fromsnap_obj
== 0 || !fromorigin
);
934 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
935 zc
.zc_cookie
= outfd
;
936 zc
.zc_obj
= fromorigin
;
937 zc
.zc_sendobj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
938 zc
.zc_fromobj
= fromsnap_obj
;
941 VERIFY(0 == nvlist_alloc(&thisdbg
, NV_UNIQUE_NAME
, 0));
942 if (fromsnap
&& fromsnap
[0] != '\0') {
943 VERIFY(0 == nvlist_add_string(thisdbg
,
944 "fromsnap", fromsnap
));
947 if (zfs_ioctl(zhp
->zfs_hdl
, ZFS_IOC_SEND
, &zc
) != 0) {
949 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
950 "warning: cannot send '%s'"), zhp
->zfs_name
);
952 VERIFY(0 == nvlist_add_uint64(thisdbg
, "error", errno
));
954 VERIFY(0 == nvlist_add_nvlist(debugnv
,
955 zhp
->zfs_name
, thisdbg
));
957 nvlist_free(thisdbg
);
961 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
962 "not an earlier snapshot from the same fs"));
963 return (zfs_error(hdl
, EZFS_CROSSTARGET
, errbuf
));
966 if (zfs_dataset_exists(hdl
, zc
.zc_name
,
967 ZFS_TYPE_SNAPSHOT
)) {
968 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
969 "incremental source (@%s) does not exist"),
972 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
985 zfs_error_aux(hdl
, strerror(errno
));
986 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
989 return (zfs_standard_error(hdl
, errno
, errbuf
));
994 VERIFY(0 == nvlist_add_nvlist(debugnv
, zhp
->zfs_name
, thisdbg
));
995 nvlist_free(thisdbg
);
1001 gather_holds(zfs_handle_t
*zhp
, send_dump_data_t
*sdd
)
1003 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
1006 * zfs_send() only sets snapholds for sends that need them,
1007 * e.g. replication and doall.
1009 if (sdd
->snapholds
== NULL
)
1012 fnvlist_add_string(sdd
->snapholds
, zhp
->zfs_name
, sdd
->holdtag
);
1016 send_progress_thread(void *arg
)
1018 progress_arg_t
*pa
= arg
;
1019 zfs_cmd_t zc
= {"\0"};
1020 zfs_handle_t
*zhp
= pa
->pa_zhp
;
1021 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
1022 unsigned long long bytes
;
1027 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
1029 if (!pa
->pa_parsable
)
1030 (void) fprintf(stderr
, "TIME SENT SNAPSHOT\n");
1033 * Print the progress from ZFS_IOC_SEND_PROGRESS every second.
1038 zc
.zc_cookie
= pa
->pa_fd
;
1039 if (zfs_ioctl(hdl
, ZFS_IOC_SEND_PROGRESS
, &zc
) != 0)
1040 return ((void *)-1);
1044 bytes
= zc
.zc_cookie
;
1046 if (pa
->pa_parsable
) {
1047 (void) fprintf(stderr
, "%02d:%02d:%02d\t%llu\t%s\n",
1048 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
,
1049 bytes
, zhp
->zfs_name
);
1051 zfs_nicenum(bytes
, buf
, sizeof (buf
));
1052 (void) fprintf(stderr
, "%02d:%02d:%02d %5s %s\n",
1053 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
,
1054 buf
, zhp
->zfs_name
);
1060 send_print_verbose(FILE *fout
, const char *tosnap
, const char *fromsnap
,
1061 uint64_t size
, boolean_t parsable
)
1064 if (fromsnap
!= NULL
) {
1065 (void) fprintf(fout
, "incremental\t%s\t%s",
1068 (void) fprintf(fout
, "full\t%s",
1072 if (fromsnap
!= NULL
) {
1073 if (strchr(fromsnap
, '@') == NULL
&&
1074 strchr(fromsnap
, '#') == NULL
) {
1075 (void) fprintf(fout
, dgettext(TEXT_DOMAIN
,
1076 "send from @%s to %s"),
1079 (void) fprintf(fout
, dgettext(TEXT_DOMAIN
,
1080 "send from %s to %s"),
1084 (void) fprintf(fout
, dgettext(TEXT_DOMAIN
,
1092 (void) fprintf(fout
, "\t%llu",
1096 zfs_nicenum(size
, buf
, sizeof (buf
));
1097 (void) fprintf(fout
, dgettext(TEXT_DOMAIN
,
1098 " estimated size is %s"), buf
);
1101 (void) fprintf(fout
, "\n");
1105 dump_snapshot(zfs_handle_t
*zhp
, void *arg
)
1107 send_dump_data_t
*sdd
= arg
;
1108 progress_arg_t pa
= { 0 };
1112 boolean_t isfromsnap
, istosnap
, fromorigin
;
1113 boolean_t exclude
= B_FALSE
;
1114 FILE *fout
= sdd
->std_out
? stdout
: stderr
;
1117 thissnap
= strchr(zhp
->zfs_name
, '@') + 1;
1118 isfromsnap
= (sdd
->fromsnap
!= NULL
&&
1119 strcmp(sdd
->fromsnap
, thissnap
) == 0);
1121 if (!sdd
->seenfrom
&& isfromsnap
) {
1122 gather_holds(zhp
, sdd
);
1123 sdd
->seenfrom
= B_TRUE
;
1124 (void) strcpy(sdd
->prevsnap
, thissnap
);
1125 sdd
->prevsnap_obj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
1130 if (sdd
->seento
|| !sdd
->seenfrom
) {
1135 istosnap
= (strcmp(sdd
->tosnap
, thissnap
) == 0);
1137 sdd
->seento
= B_TRUE
;
1139 if (!sdd
->doall
&& !isfromsnap
&& !istosnap
) {
1140 if (sdd
->replicate
) {
1142 nvlist_t
*snapprops
;
1144 * Filter out all intermediate snapshots except origin
1145 * snapshots needed to replicate clones.
1147 nvlist_t
*nvfs
= fsavl_find(sdd
->fsavl
,
1148 zhp
->zfs_dmustats
.dds_guid
, &snapname
);
1150 VERIFY(0 == nvlist_lookup_nvlist(nvfs
,
1151 "snapprops", &snapprops
));
1152 VERIFY(0 == nvlist_lookup_nvlist(snapprops
,
1153 thissnap
, &snapprops
));
1154 exclude
= !nvlist_exists(snapprops
, "is_clone_origin");
1161 * If a filter function exists, call it to determine whether
1162 * this snapshot will be sent.
1164 if (exclude
|| (sdd
->filter_cb
!= NULL
&&
1165 sdd
->filter_cb(zhp
, sdd
->filter_cb_arg
) == B_FALSE
)) {
1167 * This snapshot is filtered out. Don't send it, and don't
1168 * set prevsnap_obj, so it will be as if this snapshot didn't
1169 * exist, and the next accepted snapshot will be sent as
1170 * an incremental from the last accepted one, or as the
1171 * first (and full) snapshot in the case of a replication,
1172 * non-incremental send.
1178 gather_holds(zhp
, sdd
);
1179 fromorigin
= sdd
->prevsnap
[0] == '\0' &&
1180 (sdd
->fromorigin
|| sdd
->replicate
);
1184 (void) estimate_ioctl(zhp
, sdd
->prevsnap_obj
,
1187 send_print_verbose(fout
, zhp
->zfs_name
,
1188 sdd
->prevsnap
[0] ? sdd
->prevsnap
: NULL
,
1189 size
, sdd
->parsable
);
1195 * If progress reporting is requested, spawn a new thread to
1196 * poll ZFS_IOC_SEND_PROGRESS at a regular interval.
1198 if (sdd
->progress
) {
1200 pa
.pa_fd
= sdd
->outfd
;
1201 pa
.pa_parsable
= sdd
->parsable
;
1203 if ((err
= pthread_create(&tid
, NULL
,
1204 send_progress_thread
, &pa
))) {
1210 enum lzc_send_flags flags
= 0;
1211 if (sdd
->large_block
)
1212 flags
|= LZC_SEND_FLAG_LARGE_BLOCK
;
1213 if (sdd
->embed_data
)
1214 flags
|= LZC_SEND_FLAG_EMBED_DATA
;
1216 err
= dump_ioctl(zhp
, sdd
->prevsnap
, sdd
->prevsnap_obj
,
1217 fromorigin
, sdd
->outfd
, flags
, sdd
->debugnv
);
1219 if (sdd
->progress
) {
1220 (void) pthread_cancel(tid
);
1221 (void) pthread_join(tid
, NULL
);
1225 (void) strcpy(sdd
->prevsnap
, thissnap
);
1226 sdd
->prevsnap_obj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
1232 dump_filesystem(zfs_handle_t
*zhp
, void *arg
)
1235 send_dump_data_t
*sdd
= arg
;
1236 boolean_t missingfrom
= B_FALSE
;
1237 zfs_cmd_t zc
= {"\0"};
1239 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
), "%s@%s",
1240 zhp
->zfs_name
, sdd
->tosnap
);
1241 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
, ZFS_IOC_OBJSET_STATS
, &zc
) != 0) {
1242 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1243 "WARNING: could not send %s@%s: does not exist\n"),
1244 zhp
->zfs_name
, sdd
->tosnap
);
1249 if (sdd
->replicate
&& sdd
->fromsnap
) {
1251 * If this fs does not have fromsnap, and we're doing
1252 * recursive, we need to send a full stream from the
1253 * beginning (or an incremental from the origin if this
1254 * is a clone). If we're doing non-recursive, then let
1255 * them get the error.
1257 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
), "%s@%s",
1258 zhp
->zfs_name
, sdd
->fromsnap
);
1259 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
,
1260 ZFS_IOC_OBJSET_STATS
, &zc
) != 0) {
1261 missingfrom
= B_TRUE
;
1265 sdd
->seenfrom
= sdd
->seento
= sdd
->prevsnap
[0] = 0;
1266 sdd
->prevsnap_obj
= 0;
1267 if (sdd
->fromsnap
== NULL
|| missingfrom
)
1268 sdd
->seenfrom
= B_TRUE
;
1270 rv
= zfs_iter_snapshots_sorted(zhp
, dump_snapshot
, arg
);
1271 if (!sdd
->seenfrom
) {
1272 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1273 "WARNING: could not send %s@%s:\n"
1274 "incremental source (%s@%s) does not exist\n"),
1275 zhp
->zfs_name
, sdd
->tosnap
,
1276 zhp
->zfs_name
, sdd
->fromsnap
);
1278 } else if (!sdd
->seento
) {
1279 if (sdd
->fromsnap
) {
1280 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1281 "WARNING: could not send %s@%s:\n"
1282 "incremental source (%s@%s) "
1283 "is not earlier than it\n"),
1284 zhp
->zfs_name
, sdd
->tosnap
,
1285 zhp
->zfs_name
, sdd
->fromsnap
);
1287 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1289 "could not send %s@%s: does not exist\n"),
1290 zhp
->zfs_name
, sdd
->tosnap
);
1299 dump_filesystems(zfs_handle_t
*rzhp
, void *arg
)
1301 send_dump_data_t
*sdd
= arg
;
1303 boolean_t needagain
, progress
;
1305 if (!sdd
->replicate
)
1306 return (dump_filesystem(rzhp
, sdd
));
1308 /* Mark the clone origin snapshots. */
1309 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1310 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1312 uint64_t origin_guid
= 0;
1314 VERIFY(0 == nvpair_value_nvlist(fspair
, &nvfs
));
1315 (void) nvlist_lookup_uint64(nvfs
, "origin", &origin_guid
);
1316 if (origin_guid
!= 0) {
1318 nvlist_t
*origin_nv
= fsavl_find(sdd
->fsavl
,
1319 origin_guid
, &snapname
);
1320 if (origin_nv
!= NULL
) {
1321 nvlist_t
*snapprops
;
1322 VERIFY(0 == nvlist_lookup_nvlist(origin_nv
,
1323 "snapprops", &snapprops
));
1324 VERIFY(0 == nvlist_lookup_nvlist(snapprops
,
1325 snapname
, &snapprops
));
1326 VERIFY(0 == nvlist_add_boolean(
1327 snapprops
, "is_clone_origin"));
1332 needagain
= progress
= B_FALSE
;
1333 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1334 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1335 nvlist_t
*fslist
, *parent_nv
;
1339 uint64_t origin_guid
= 0;
1340 uint64_t parent_guid
= 0;
1342 VERIFY(nvpair_value_nvlist(fspair
, &fslist
) == 0);
1343 if (nvlist_lookup_boolean(fslist
, "sent") == 0)
1346 VERIFY(nvlist_lookup_string(fslist
, "name", &fsname
) == 0);
1347 (void) nvlist_lookup_uint64(fslist
, "origin", &origin_guid
);
1348 (void) nvlist_lookup_uint64(fslist
, "parentfromsnap",
1351 if (parent_guid
!= 0) {
1352 parent_nv
= fsavl_find(sdd
->fsavl
, parent_guid
, NULL
);
1353 if (!nvlist_exists(parent_nv
, "sent")) {
1354 /* parent has not been sent; skip this one */
1360 if (origin_guid
!= 0) {
1361 nvlist_t
*origin_nv
= fsavl_find(sdd
->fsavl
,
1363 if (origin_nv
!= NULL
&&
1364 !nvlist_exists(origin_nv
, "sent")) {
1366 * origin has not been sent yet;
1374 zhp
= zfs_open(rzhp
->zfs_hdl
, fsname
, ZFS_TYPE_DATASET
);
1377 err
= dump_filesystem(zhp
, sdd
);
1378 VERIFY(nvlist_add_boolean(fslist
, "sent") == 0);
1389 /* clean out the sent flags in case we reuse this fss */
1390 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1391 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1394 VERIFY(nvpair_value_nvlist(fspair
, &fslist
) == 0);
1395 (void) nvlist_remove_all(fslist
, "sent");
1402 zfs_send_resume_token_to_nvlist(libzfs_handle_t
*hdl
, const char *token
)
1404 unsigned int version
;
1406 unsigned long long checksum
, packed_len
;
1409 * Decode token header, which is:
1410 * <token version>-<checksum of payload>-<uncompressed payload length>
1411 * Note that the only supported token version is 1.
1413 nread
= sscanf(token
, "%u-%llx-%llx-",
1414 &version
, &checksum
, &packed_len
);
1416 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1417 "resume token is corrupt (invalid format)"));
1421 if (version
!= ZFS_SEND_RESUME_TOKEN_VERSION
) {
1422 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1423 "resume token is corrupt (invalid version %u)"),
1428 /* convert hexadecimal representation to binary */
1429 token
= strrchr(token
, '-') + 1;
1430 int len
= strlen(token
) / 2;
1431 unsigned char *compressed
= zfs_alloc(hdl
, len
);
1432 for (i
= 0; i
< len
; i
++) {
1433 nread
= sscanf(token
+ i
* 2, "%2hhx", compressed
+ i
);
1436 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1437 "resume token is corrupt "
1438 "(payload is not hex-encoded)"));
1443 /* verify checksum */
1445 fletcher_4_native(compressed
, len
, &cksum
);
1446 if (cksum
.zc_word
[0] != checksum
) {
1448 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1449 "resume token is corrupt (incorrect checksum)"));
1454 void *packed
= zfs_alloc(hdl
, packed_len
);
1455 uLongf packed_len_long
= packed_len
;
1456 if (uncompress(packed
, &packed_len_long
, compressed
, len
) != Z_OK
||
1457 packed_len_long
!= packed_len
) {
1460 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1461 "resume token is corrupt (decompression failed)"));
1467 int error
= nvlist_unpack(packed
, packed_len
, &nv
, KM_SLEEP
);
1471 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1472 "resume token is corrupt (nvlist_unpack failed)"));
1479 zfs_send_resume(libzfs_handle_t
*hdl
, sendflags_t
*flags
, int outfd
,
1480 const char *resume_token
)
1484 char *fromname
= NULL
;
1485 uint64_t resumeobj
, resumeoff
, toguid
, fromguid
, bytes
;
1488 char name
[ZFS_MAX_DATASET_NAME_LEN
];
1489 enum lzc_send_flags lzc_flags
= 0;
1491 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
1492 "cannot resume send"));
1494 nvlist_t
*resume_nvl
=
1495 zfs_send_resume_token_to_nvlist(hdl
, resume_token
);
1496 if (resume_nvl
== NULL
) {
1498 * zfs_error_aux has already been set by
1499 * zfs_send_resume_token_to_nvlist
1501 return (zfs_error(hdl
, EZFS_FAULT
, errbuf
));
1503 if (flags
->verbose
) {
1504 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1505 "resume token contents:\n"));
1506 nvlist_print(stderr
, resume_nvl
);
1509 if (nvlist_lookup_string(resume_nvl
, "toname", &toname
) != 0 ||
1510 nvlist_lookup_uint64(resume_nvl
, "object", &resumeobj
) != 0 ||
1511 nvlist_lookup_uint64(resume_nvl
, "offset", &resumeoff
) != 0 ||
1512 nvlist_lookup_uint64(resume_nvl
, "bytes", &bytes
) != 0 ||
1513 nvlist_lookup_uint64(resume_nvl
, "toguid", &toguid
) != 0) {
1514 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1515 "resume token is corrupt"));
1516 return (zfs_error(hdl
, EZFS_FAULT
, errbuf
));
1519 (void) nvlist_lookup_uint64(resume_nvl
, "fromguid", &fromguid
);
1521 if (flags
->embed_data
|| nvlist_exists(resume_nvl
, "embedok"))
1522 lzc_flags
|= LZC_SEND_FLAG_EMBED_DATA
;
1524 if (guid_to_name(hdl
, toname
, toguid
, B_FALSE
, name
) != 0) {
1525 if (zfs_dataset_exists(hdl
, toname
, ZFS_TYPE_DATASET
)) {
1526 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1527 "'%s' is no longer the same snapshot used in "
1528 "the initial send"), toname
);
1530 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1531 "'%s' used in the initial send no longer exists"),
1534 return (zfs_error(hdl
, EZFS_BADPATH
, errbuf
));
1536 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
1538 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1539 "unable to access '%s'"), name
);
1540 return (zfs_error(hdl
, EZFS_BADPATH
, errbuf
));
1543 if (fromguid
!= 0) {
1544 if (guid_to_name(hdl
, toname
, fromguid
, B_TRUE
, name
) != 0) {
1545 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1546 "incremental source %#llx no longer exists"),
1547 (longlong_t
)fromguid
);
1548 return (zfs_error(hdl
, EZFS_BADPATH
, errbuf
));
1553 if (flags
->verbose
) {
1555 error
= lzc_send_space(zhp
->zfs_name
, fromname
, &size
);
1557 size
= MAX(0, (int64_t)(size
- bytes
));
1558 send_print_verbose(stderr
, zhp
->zfs_name
, fromname
,
1559 size
, flags
->parsable
);
1562 if (!flags
->dryrun
) {
1563 progress_arg_t pa
= { 0 };
1566 * If progress reporting is requested, spawn a new thread to
1567 * poll ZFS_IOC_SEND_PROGRESS at a regular interval.
1569 if (flags
->progress
) {
1572 pa
.pa_parsable
= flags
->parsable
;
1574 error
= pthread_create(&tid
, NULL
,
1575 send_progress_thread
, &pa
);
1582 error
= lzc_send_resume(zhp
->zfs_name
, fromname
, outfd
,
1583 lzc_flags
, resumeobj
, resumeoff
);
1585 if (flags
->progress
) {
1586 (void) pthread_cancel(tid
);
1587 (void) pthread_join(tid
, NULL
);
1591 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
1592 "warning: cannot send '%s'"), zhp
->zfs_name
);
1612 zfs_error_aux(hdl
, strerror(errno
));
1613 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
1616 return (zfs_standard_error(hdl
, errno
, errbuf
));
1627 * Generate a send stream for the dataset identified by the argument zhp.
1629 * The content of the send stream is the snapshot identified by
1630 * 'tosnap'. Incremental streams are requested in two ways:
1631 * - from the snapshot identified by "fromsnap" (if non-null) or
1632 * - from the origin of the dataset identified by zhp, which must
1633 * be a clone. In this case, "fromsnap" is null and "fromorigin"
1636 * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and
1637 * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM)
1638 * if "replicate" is set. If "doall" is set, dump all the intermediate
1639 * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall"
1640 * case too. If "props" is set, send properties.
1643 zfs_send(zfs_handle_t
*zhp
, const char *fromsnap
, const char *tosnap
,
1644 sendflags_t
*flags
, int outfd
, snapfilter_cb_t filter_func
,
1645 void *cb_arg
, nvlist_t
**debugnvp
)
1648 send_dump_data_t sdd
= { 0 };
1650 nvlist_t
*fss
= NULL
;
1651 avl_tree_t
*fsavl
= NULL
;
1652 static uint64_t holdseq
;
1656 dedup_arg_t dda
= { 0 };
1657 int featureflags
= 0;
1660 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
1661 "cannot send '%s'"), zhp
->zfs_name
);
1663 if (fromsnap
&& fromsnap
[0] == '\0') {
1664 zfs_error_aux(zhp
->zfs_hdl
, dgettext(TEXT_DOMAIN
,
1665 "zero-length incremental source"));
1666 return (zfs_error(zhp
->zfs_hdl
, EZFS_NOENT
, errbuf
));
1669 if (zhp
->zfs_type
== ZFS_TYPE_FILESYSTEM
) {
1671 version
= zfs_prop_get_int(zhp
, ZFS_PROP_VERSION
);
1672 if (version
>= ZPL_VERSION_SA
) {
1673 featureflags
|= DMU_BACKUP_FEATURE_SA_SPILL
;
1677 if (flags
->dedup
&& !flags
->dryrun
) {
1678 featureflags
|= (DMU_BACKUP_FEATURE_DEDUP
|
1679 DMU_BACKUP_FEATURE_DEDUPPROPS
);
1680 if ((err
= socketpair(AF_UNIX
, SOCK_STREAM
, 0, pipefd
))) {
1681 zfs_error_aux(zhp
->zfs_hdl
, strerror(errno
));
1682 return (zfs_error(zhp
->zfs_hdl
, EZFS_PIPEFAILED
,
1685 dda
.outputfd
= outfd
;
1686 dda
.inputfd
= pipefd
[1];
1687 dda
.dedup_hdl
= zhp
->zfs_hdl
;
1688 if ((err
= pthread_create(&tid
, NULL
, cksummer
, &dda
))) {
1689 (void) close(pipefd
[0]);
1690 (void) close(pipefd
[1]);
1691 zfs_error_aux(zhp
->zfs_hdl
, strerror(errno
));
1692 return (zfs_error(zhp
->zfs_hdl
,
1693 EZFS_THREADCREATEFAILED
, errbuf
));
1697 if (flags
->replicate
|| flags
->doall
|| flags
->props
) {
1698 dmu_replay_record_t drr
= { 0 };
1699 char *packbuf
= NULL
;
1703 ZIO_SET_CHECKSUM(&zc
, 0, 0, 0, 0);
1705 if (flags
->replicate
|| flags
->props
) {
1708 VERIFY(0 == nvlist_alloc(&hdrnv
, NV_UNIQUE_NAME
, 0));
1710 VERIFY(0 == nvlist_add_string(hdrnv
,
1711 "fromsnap", fromsnap
));
1713 VERIFY(0 == nvlist_add_string(hdrnv
, "tosnap", tosnap
));
1714 if (!flags
->replicate
) {
1715 VERIFY(0 == nvlist_add_boolean(hdrnv
,
1719 err
= gather_nvlist(zhp
->zfs_hdl
, zhp
->zfs_name
,
1720 fromsnap
, tosnap
, flags
->replicate
, &fss
, &fsavl
);
1723 VERIFY(0 == nvlist_add_nvlist(hdrnv
, "fss", fss
));
1724 err
= nvlist_pack(hdrnv
, &packbuf
, &buflen
,
1734 if (!flags
->dryrun
) {
1735 /* write first begin record */
1736 drr
.drr_type
= DRR_BEGIN
;
1737 drr
.drr_u
.drr_begin
.drr_magic
= DMU_BACKUP_MAGIC
;
1738 DMU_SET_STREAM_HDRTYPE(drr
.drr_u
.drr_begin
.
1739 drr_versioninfo
, DMU_COMPOUNDSTREAM
);
1740 DMU_SET_FEATUREFLAGS(drr
.drr_u
.drr_begin
.
1741 drr_versioninfo
, featureflags
);
1742 (void) snprintf(drr
.drr_u
.drr_begin
.drr_toname
,
1743 sizeof (drr
.drr_u
.drr_begin
.drr_toname
),
1744 "%s@%s", zhp
->zfs_name
, tosnap
);
1745 drr
.drr_payloadlen
= buflen
;
1747 err
= dump_record(&drr
, packbuf
, buflen
, &zc
, outfd
);
1752 /* write end record */
1753 bzero(&drr
, sizeof (drr
));
1754 drr
.drr_type
= DRR_END
;
1755 drr
.drr_u
.drr_end
.drr_checksum
= zc
;
1756 err
= write(outfd
, &drr
, sizeof (drr
));
1766 /* dump each stream */
1767 sdd
.fromsnap
= fromsnap
;
1768 sdd
.tosnap
= tosnap
;
1770 sdd
.outfd
= pipefd
[0];
1773 sdd
.replicate
= flags
->replicate
;
1774 sdd
.doall
= flags
->doall
;
1775 sdd
.fromorigin
= flags
->fromorigin
;
1778 sdd
.verbose
= flags
->verbose
;
1779 sdd
.parsable
= flags
->parsable
;
1780 sdd
.progress
= flags
->progress
;
1781 sdd
.dryrun
= flags
->dryrun
;
1782 sdd
.large_block
= flags
->largeblock
;
1783 sdd
.embed_data
= flags
->embed_data
;
1784 sdd
.filter_cb
= filter_func
;
1785 sdd
.filter_cb_arg
= cb_arg
;
1787 sdd
.debugnv
= *debugnvp
;
1788 if (sdd
.verbose
&& sdd
.dryrun
)
1789 sdd
.std_out
= B_TRUE
;
1790 fout
= sdd
.std_out
? stdout
: stderr
;
1793 * Some flags require that we place user holds on the datasets that are
1794 * being sent so they don't get destroyed during the send. We can skip
1795 * this step if the pool is imported read-only since the datasets cannot
1798 if (!flags
->dryrun
&& !zpool_get_prop_int(zfs_get_pool_handle(zhp
),
1799 ZPOOL_PROP_READONLY
, NULL
) &&
1800 zfs_spa_version(zhp
, &spa_version
) == 0 &&
1801 spa_version
>= SPA_VERSION_USERREFS
&&
1802 (flags
->doall
|| flags
->replicate
)) {
1804 (void) snprintf(sdd
.holdtag
, sizeof (sdd
.holdtag
),
1805 ".send-%d-%llu", getpid(), (u_longlong_t
)holdseq
);
1806 sdd
.cleanup_fd
= open(ZFS_DEV
, O_RDWR
);
1807 if (sdd
.cleanup_fd
< 0) {
1811 sdd
.snapholds
= fnvlist_alloc();
1813 sdd
.cleanup_fd
= -1;
1814 sdd
.snapholds
= NULL
;
1816 if (flags
->verbose
|| sdd
.snapholds
!= NULL
) {
1818 * Do a verbose no-op dry run to get all the verbose output
1819 * or to gather snapshot hold's before generating any data,
1820 * then do a non-verbose real run to generate the streams.
1822 sdd
.dryrun
= B_TRUE
;
1823 err
= dump_filesystems(zhp
, &sdd
);
1828 if (flags
->verbose
) {
1829 if (flags
->parsable
) {
1830 (void) fprintf(fout
, "size\t%llu\n",
1831 (longlong_t
)sdd
.size
);
1834 zfs_nicenum(sdd
.size
, buf
, sizeof (buf
));
1835 (void) fprintf(fout
, dgettext(TEXT_DOMAIN
,
1836 "total estimated size is %s\n"), buf
);
1840 /* Ensure no snaps found is treated as an error. */
1846 /* Skip the second run if dryrun was requested. */
1850 if (sdd
.snapholds
!= NULL
) {
1851 err
= zfs_hold_nvl(zhp
, sdd
.cleanup_fd
, sdd
.snapholds
);
1855 fnvlist_free(sdd
.snapholds
);
1856 sdd
.snapholds
= NULL
;
1859 sdd
.dryrun
= B_FALSE
;
1860 sdd
.verbose
= B_FALSE
;
1863 err
= dump_filesystems(zhp
, &sdd
);
1864 fsavl_destroy(fsavl
);
1867 /* Ensure no snaps found is treated as an error. */
1868 if (err
== 0 && !sdd
.seento
)
1873 (void) pthread_cancel(tid
);
1874 (void) close(pipefd
[0]);
1875 (void) pthread_join(tid
, NULL
);
1878 if (sdd
.cleanup_fd
!= -1) {
1879 VERIFY(0 == close(sdd
.cleanup_fd
));
1880 sdd
.cleanup_fd
= -1;
1883 if (!flags
->dryrun
&& (flags
->replicate
|| flags
->doall
||
1886 * write final end record. NB: want to do this even if
1887 * there was some error, because it might not be totally
1890 dmu_replay_record_t drr
= { 0 };
1891 drr
.drr_type
= DRR_END
;
1892 if (write(outfd
, &drr
, sizeof (drr
)) == -1) {
1893 return (zfs_standard_error(zhp
->zfs_hdl
,
1898 return (err
|| sdd
.err
);
1901 err
= zfs_standard_error(zhp
->zfs_hdl
, err
, errbuf
);
1903 fsavl_destroy(fsavl
);
1905 fnvlist_free(sdd
.snapholds
);
1907 if (sdd
.cleanup_fd
!= -1)
1908 VERIFY(0 == close(sdd
.cleanup_fd
));
1910 (void) pthread_cancel(tid
);
1911 (void) close(pipefd
[0]);
1912 (void) pthread_join(tid
, NULL
);
1918 zfs_send_one(zfs_handle_t
*zhp
, const char *from
, int fd
,
1919 enum lzc_send_flags flags
)
1922 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
1925 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
1926 "warning: cannot send '%s'"), zhp
->zfs_name
);
1928 err
= lzc_send(zhp
->zfs_name
, from
, fd
, flags
);
1932 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1933 "not an earlier snapshot from the same fs"));
1934 return (zfs_error(hdl
, EZFS_CROSSTARGET
, errbuf
));
1938 if (lzc_exists(zhp
->zfs_name
)) {
1939 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1940 "incremental source (%s) does not exist"),
1943 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
1946 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1947 "target is busy; if a filesystem, "
1948 "it must not be mounted"));
1949 return (zfs_error(hdl
, EZFS_BUSY
, errbuf
));
1962 zfs_error_aux(hdl
, strerror(errno
));
1963 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
1966 return (zfs_standard_error(hdl
, errno
, errbuf
));
1973 * Routines specific to "zfs recv"
1977 recv_read(libzfs_handle_t
*hdl
, int fd
, void *buf
, int ilen
,
1978 boolean_t byteswap
, zio_cksum_t
*zc
)
1984 assert(ilen
<= SPA_MAXBLOCKSIZE
);
1987 rv
= read(fd
, cp
, len
);
1992 if (rv
< 0 || len
!= 0) {
1993 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1994 "failed to read from stream"));
1995 return (zfs_error(hdl
, EZFS_BADSTREAM
, dgettext(TEXT_DOMAIN
,
1996 "cannot receive")));
2001 fletcher_4_incremental_byteswap(buf
, ilen
, zc
);
2003 fletcher_4_incremental_native(buf
, ilen
, zc
);
2009 recv_read_nvlist(libzfs_handle_t
*hdl
, int fd
, int len
, nvlist_t
**nvp
,
2010 boolean_t byteswap
, zio_cksum_t
*zc
)
2015 buf
= zfs_alloc(hdl
, len
);
2019 err
= recv_read(hdl
, fd
, buf
, len
, byteswap
, zc
);
2025 err
= nvlist_unpack(buf
, len
, nvp
, 0);
2028 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2029 "stream (malformed nvlist)"));
2036 recv_rename(libzfs_handle_t
*hdl
, const char *name
, const char *tryname
,
2037 int baselen
, char *newname
, recvflags_t
*flags
)
2040 zfs_cmd_t zc
= {"\0"};
2042 prop_changelist_t
*clp
;
2045 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
2048 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0,
2049 flags
->force
? MS_FORCE
: 0);
2053 err
= changelist_prefix(clp
);
2057 zc
.zc_objset_type
= DMU_OST_ZFS
;
2058 (void) strlcpy(zc
.zc_name
, name
, sizeof (zc
.zc_name
));
2061 (void) strcpy(newname
, tryname
);
2063 (void) strlcpy(zc
.zc_value
, tryname
, sizeof (zc
.zc_value
));
2065 if (flags
->verbose
) {
2066 (void) printf("attempting rename %s to %s\n",
2067 zc
.zc_name
, zc
.zc_value
);
2069 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_RENAME
, &zc
);
2071 changelist_rename(clp
, name
, tryname
);
2076 if (err
!= 0 && strncmp(name
+ baselen
, "recv-", 5) != 0) {
2079 (void) snprintf(newname
, ZFS_MAX_DATASET_NAME_LEN
,
2080 "%.*srecv-%u-%u", baselen
, name
, getpid(), seq
);
2081 (void) strlcpy(zc
.zc_value
, newname
, sizeof (zc
.zc_value
));
2083 if (flags
->verbose
) {
2084 (void) printf("failed - trying rename %s to %s\n",
2085 zc
.zc_name
, zc
.zc_value
);
2087 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_RENAME
, &zc
);
2089 changelist_rename(clp
, name
, newname
);
2090 if (err
&& flags
->verbose
) {
2091 (void) printf("failed (%u) - "
2092 "will try again on next pass\n", errno
);
2095 } else if (flags
->verbose
) {
2097 (void) printf("success\n");
2099 (void) printf("failed (%u)\n", errno
);
2102 (void) changelist_postfix(clp
);
2103 changelist_free(clp
);
2109 recv_destroy(libzfs_handle_t
*hdl
, const char *name
, int baselen
,
2110 char *newname
, recvflags_t
*flags
)
2112 zfs_cmd_t zc
= {"\0"};
2114 prop_changelist_t
*clp
;
2116 boolean_t defer
= B_FALSE
;
2119 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
2122 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0,
2123 flags
->force
? MS_FORCE
: 0);
2124 if (zfs_get_type(zhp
) == ZFS_TYPE_SNAPSHOT
&&
2125 zfs_spa_version(zhp
, &spa_version
) == 0 &&
2126 spa_version
>= SPA_VERSION_USERREFS
)
2131 err
= changelist_prefix(clp
);
2135 zc
.zc_objset_type
= DMU_OST_ZFS
;
2136 zc
.zc_defer_destroy
= defer
;
2137 (void) strlcpy(zc
.zc_name
, name
, sizeof (zc
.zc_name
));
2140 (void) printf("attempting destroy %s\n", zc
.zc_name
);
2141 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_DESTROY
, &zc
);
2144 (void) printf("success\n");
2145 changelist_remove(clp
, zc
.zc_name
);
2148 (void) changelist_postfix(clp
);
2149 changelist_free(clp
);
2152 * Deferred destroy might destroy the snapshot or only mark it to be
2153 * destroyed later, and it returns success in either case.
2155 if (err
!= 0 || (defer
&& zfs_dataset_exists(hdl
, name
,
2156 ZFS_TYPE_SNAPSHOT
))) {
2157 err
= recv_rename(hdl
, name
, NULL
, baselen
, newname
, flags
);
2163 typedef struct guid_to_name_data
{
2165 boolean_t bookmark_ok
;
2168 } guid_to_name_data_t
;
2171 guid_to_name_cb(zfs_handle_t
*zhp
, void *arg
)
2173 guid_to_name_data_t
*gtnd
= arg
;
2177 if (gtnd
->skip
!= NULL
&&
2178 (slash
= strrchr(zhp
->zfs_name
, '/')) != NULL
&&
2179 strcmp(slash
+ 1, gtnd
->skip
) == 0) {
2184 if (zfs_prop_get_int(zhp
, ZFS_PROP_GUID
) == gtnd
->guid
) {
2185 (void) strcpy(gtnd
->name
, zhp
->zfs_name
);
2190 err
= zfs_iter_children(zhp
, guid_to_name_cb
, gtnd
);
2191 if (err
!= EEXIST
&& gtnd
->bookmark_ok
)
2192 err
= zfs_iter_bookmarks(zhp
, guid_to_name_cb
, gtnd
);
2198 * Attempt to find the local dataset associated with this guid. In the case of
2199 * multiple matches, we attempt to find the "best" match by searching
2200 * progressively larger portions of the hierarchy. This allows one to send a
2201 * tree of datasets individually and guarantee that we will find the source
2202 * guid within that hierarchy, even if there are multiple matches elsewhere.
2205 guid_to_name(libzfs_handle_t
*hdl
, const char *parent
, uint64_t guid
,
2206 boolean_t bookmark_ok
, char *name
)
2208 char pname
[ZFS_MAX_DATASET_NAME_LEN
];
2209 guid_to_name_data_t gtnd
;
2212 gtnd
.bookmark_ok
= bookmark_ok
;
2217 * Search progressively larger portions of the hierarchy, starting
2218 * with the filesystem specified by 'parent'. This will
2219 * select the "most local" version of the origin snapshot in the case
2220 * that there are multiple matching snapshots in the system.
2222 (void) strlcpy(pname
, parent
, sizeof (pname
));
2223 char *cp
= strrchr(pname
, '@');
2225 cp
= strchr(pname
, '\0');
2226 for (; cp
!= NULL
; cp
= strrchr(pname
, '/')) {
2227 /* Chop off the last component and open the parent */
2229 zfs_handle_t
*zhp
= make_dataset_handle(hdl
, pname
);
2233 int err
= guid_to_name_cb(zfs_handle_dup(zhp
), >nd
);
2235 err
= zfs_iter_children(zhp
, guid_to_name_cb
, >nd
);
2236 if (err
!= EEXIST
&& bookmark_ok
)
2237 err
= zfs_iter_bookmarks(zhp
, guid_to_name_cb
, >nd
);
2243 * Remember the last portion of the dataset so we skip it next
2244 * time through (as we've already searched that portion of the
2247 gtnd
.skip
= strrchr(pname
, '/') + 1;
2254 * Return +1 if guid1 is before guid2, 0 if they are the same, and -1 if
2255 * guid1 is after guid2.
2258 created_before(libzfs_handle_t
*hdl
, avl_tree_t
*avl
,
2259 uint64_t guid1
, uint64_t guid2
)
2262 char *fsname
= NULL
, *snapname
= NULL
;
2263 char buf
[ZFS_MAX_DATASET_NAME_LEN
];
2265 zfs_handle_t
*guid1hdl
, *guid2hdl
;
2266 uint64_t create1
, create2
;
2273 nvfs
= fsavl_find(avl
, guid1
, &snapname
);
2274 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
2275 (void) snprintf(buf
, sizeof (buf
), "%s@%s", fsname
, snapname
);
2276 guid1hdl
= zfs_open(hdl
, buf
, ZFS_TYPE_SNAPSHOT
);
2277 if (guid1hdl
== NULL
)
2280 nvfs
= fsavl_find(avl
, guid2
, &snapname
);
2281 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
2282 (void) snprintf(buf
, sizeof (buf
), "%s@%s", fsname
, snapname
);
2283 guid2hdl
= zfs_open(hdl
, buf
, ZFS_TYPE_SNAPSHOT
);
2284 if (guid2hdl
== NULL
) {
2285 zfs_close(guid1hdl
);
2289 create1
= zfs_prop_get_int(guid1hdl
, ZFS_PROP_CREATETXG
);
2290 create2
= zfs_prop_get_int(guid2hdl
, ZFS_PROP_CREATETXG
);
2292 if (create1
< create2
)
2294 else if (create1
> create2
)
2299 zfs_close(guid1hdl
);
2300 zfs_close(guid2hdl
);
2306 recv_incremental_replication(libzfs_handle_t
*hdl
, const char *tofs
,
2307 recvflags_t
*flags
, nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
,
2310 nvlist_t
*local_nv
, *deleted
= NULL
;
2311 avl_tree_t
*local_avl
;
2312 nvpair_t
*fselem
, *nextfselem
;
2314 char newname
[ZFS_MAX_DATASET_NAME_LEN
];
2317 boolean_t needagain
, progress
, recursive
;
2320 VERIFY(0 == nvlist_lookup_string(stream_nv
, "fromsnap", &fromsnap
));
2322 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2329 needagain
= progress
= B_FALSE
;
2331 VERIFY(0 == nvlist_alloc(&deleted
, NV_UNIQUE_NAME
, 0));
2333 if ((error
= gather_nvlist(hdl
, tofs
, fromsnap
, NULL
,
2334 recursive
, &local_nv
, &local_avl
)) != 0)
2338 * Process deletes and renames
2340 for (fselem
= nvlist_next_nvpair(local_nv
, NULL
);
2341 fselem
; fselem
= nextfselem
) {
2342 nvlist_t
*nvfs
, *snaps
;
2343 nvlist_t
*stream_nvfs
= NULL
;
2344 nvpair_t
*snapelem
, *nextsnapelem
;
2345 uint64_t fromguid
= 0;
2346 uint64_t originguid
= 0;
2347 uint64_t stream_originguid
= 0;
2348 uint64_t parent_fromsnap_guid
, stream_parent_fromsnap_guid
;
2349 char *fsname
, *stream_fsname
;
2351 nextfselem
= nvlist_next_nvpair(local_nv
, fselem
);
2353 VERIFY(0 == nvpair_value_nvlist(fselem
, &nvfs
));
2354 VERIFY(0 == nvlist_lookup_nvlist(nvfs
, "snaps", &snaps
));
2355 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
2356 VERIFY(0 == nvlist_lookup_uint64(nvfs
, "parentfromsnap",
2357 &parent_fromsnap_guid
));
2358 (void) nvlist_lookup_uint64(nvfs
, "origin", &originguid
);
2361 * First find the stream's fs, so we can check for
2362 * a different origin (due to "zfs promote")
2364 for (snapelem
= nvlist_next_nvpair(snaps
, NULL
);
2365 snapelem
; snapelem
= nvlist_next_nvpair(snaps
, snapelem
)) {
2368 VERIFY(0 == nvpair_value_uint64(snapelem
, &thisguid
));
2369 stream_nvfs
= fsavl_find(stream_avl
, thisguid
, NULL
);
2371 if (stream_nvfs
!= NULL
)
2375 /* check for promote */
2376 (void) nvlist_lookup_uint64(stream_nvfs
, "origin",
2377 &stream_originguid
);
2378 if (stream_nvfs
&& originguid
!= stream_originguid
) {
2379 switch (created_before(hdl
, local_avl
,
2380 stream_originguid
, originguid
)) {
2383 zfs_cmd_t zc
= {"\0"};
2384 nvlist_t
*origin_nvfs
;
2385 char *origin_fsname
;
2388 (void) printf("promoting %s\n", fsname
);
2390 origin_nvfs
= fsavl_find(local_avl
, originguid
,
2392 VERIFY(0 == nvlist_lookup_string(origin_nvfs
,
2393 "name", &origin_fsname
));
2394 (void) strlcpy(zc
.zc_value
, origin_fsname
,
2395 sizeof (zc
.zc_value
));
2396 (void) strlcpy(zc
.zc_name
, fsname
,
2397 sizeof (zc
.zc_name
));
2398 error
= zfs_ioctl(hdl
, ZFS_IOC_PROMOTE
, &zc
);
2406 fsavl_destroy(local_avl
);
2407 nvlist_free(local_nv
);
2411 * We had/have the wrong origin, therefore our
2412 * list of snapshots is wrong. Need to handle
2413 * them on the next pass.
2419 for (snapelem
= nvlist_next_nvpair(snaps
, NULL
);
2420 snapelem
; snapelem
= nextsnapelem
) {
2422 char *stream_snapname
;
2423 nvlist_t
*found
, *props
;
2425 nextsnapelem
= nvlist_next_nvpair(snaps
, snapelem
);
2427 VERIFY(0 == nvpair_value_uint64(snapelem
, &thisguid
));
2428 found
= fsavl_find(stream_avl
, thisguid
,
2431 /* check for delete */
2432 if (found
== NULL
) {
2433 char name
[ZFS_MAX_DATASET_NAME_LEN
];
2438 (void) snprintf(name
, sizeof (name
), "%s@%s",
2439 fsname
, nvpair_name(snapelem
));
2441 error
= recv_destroy(hdl
, name
,
2442 strlen(fsname
)+1, newname
, flags
);
2447 sprintf(guidname
, "%llu",
2448 (u_longlong_t
)thisguid
);
2449 nvlist_add_boolean(deleted
, guidname
);
2453 stream_nvfs
= found
;
2455 if (0 == nvlist_lookup_nvlist(stream_nvfs
, "snapprops",
2456 &props
) && 0 == nvlist_lookup_nvlist(props
,
2457 stream_snapname
, &props
)) {
2458 zfs_cmd_t zc
= {"\0"};
2460 zc
.zc_cookie
= B_TRUE
; /* received */
2461 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
),
2462 "%s@%s", fsname
, nvpair_name(snapelem
));
2463 if (zcmd_write_src_nvlist(hdl
, &zc
,
2465 (void) zfs_ioctl(hdl
,
2466 ZFS_IOC_SET_PROP
, &zc
);
2467 zcmd_free_nvlists(&zc
);
2471 /* check for different snapname */
2472 if (strcmp(nvpair_name(snapelem
),
2473 stream_snapname
) != 0) {
2474 char name
[ZFS_MAX_DATASET_NAME_LEN
];
2475 char tryname
[ZFS_MAX_DATASET_NAME_LEN
];
2477 (void) snprintf(name
, sizeof (name
), "%s@%s",
2478 fsname
, nvpair_name(snapelem
));
2479 (void) snprintf(tryname
, sizeof (name
), "%s@%s",
2480 fsname
, stream_snapname
);
2482 error
= recv_rename(hdl
, name
, tryname
,
2483 strlen(fsname
)+1, newname
, flags
);
2490 if (strcmp(stream_snapname
, fromsnap
) == 0)
2491 fromguid
= thisguid
;
2494 /* check for delete */
2495 if (stream_nvfs
== NULL
) {
2499 error
= recv_destroy(hdl
, fsname
, strlen(tofs
)+1,
2505 sprintf(guidname
, "%llu",
2506 (u_longlong_t
) parent_fromsnap_guid
);
2507 nvlist_add_boolean(deleted
, guidname
);
2511 if (fromguid
== 0) {
2512 if (flags
->verbose
) {
2513 (void) printf("local fs %s does not have "
2514 "fromsnap (%s in stream); must have "
2515 "been deleted locally; ignoring\n",
2521 VERIFY(0 == nvlist_lookup_string(stream_nvfs
,
2522 "name", &stream_fsname
));
2523 VERIFY(0 == nvlist_lookup_uint64(stream_nvfs
,
2524 "parentfromsnap", &stream_parent_fromsnap_guid
));
2526 s1
= strrchr(fsname
, '/');
2527 s2
= strrchr(stream_fsname
, '/');
2530 * Check if we're going to rename based on parent guid change
2531 * and the current parent guid was also deleted. If it was then
2532 * rename will fail and is likely unneeded, so avoid this and
2533 * force an early retry to determine the new
2534 * parent_fromsnap_guid.
2536 if (stream_parent_fromsnap_guid
!= 0 &&
2537 parent_fromsnap_guid
!= 0 &&
2538 stream_parent_fromsnap_guid
!= parent_fromsnap_guid
) {
2539 sprintf(guidname
, "%llu",
2540 (u_longlong_t
) parent_fromsnap_guid
);
2541 if (nvlist_exists(deleted
, guidname
)) {
2549 * Check for rename. If the exact receive path is specified, it
2550 * does not count as a rename, but we still need to check the
2551 * datasets beneath it.
2553 if ((stream_parent_fromsnap_guid
!= 0 &&
2554 parent_fromsnap_guid
!= 0 &&
2555 stream_parent_fromsnap_guid
!= parent_fromsnap_guid
) ||
2556 ((flags
->isprefix
|| strcmp(tofs
, fsname
) != 0) &&
2557 (s1
!= NULL
) && (s2
!= NULL
) && strcmp(s1
, s2
) != 0)) {
2559 char tryname
[ZFS_MAX_DATASET_NAME_LEN
];
2561 parent
= fsavl_find(local_avl
,
2562 stream_parent_fromsnap_guid
, NULL
);
2564 * NB: parent might not be found if we used the
2565 * tosnap for stream_parent_fromsnap_guid,
2566 * because the parent is a newly-created fs;
2567 * we'll be able to rename it after we recv the
2570 if (parent
!= NULL
) {
2573 VERIFY(0 == nvlist_lookup_string(parent
, "name",
2575 (void) snprintf(tryname
, sizeof (tryname
),
2576 "%s%s", pname
, strrchr(stream_fsname
, '/'));
2579 if (flags
->verbose
) {
2580 (void) printf("local fs %s new parent "
2581 "not found\n", fsname
);
2587 error
= recv_rename(hdl
, fsname
, tryname
,
2588 strlen(tofs
)+1, newname
, flags
);
2590 if (renamed
!= NULL
&& newname
[0] != '\0') {
2591 VERIFY(0 == nvlist_add_boolean(renamed
,
2603 fsavl_destroy(local_avl
);
2604 nvlist_free(local_nv
);
2605 nvlist_free(deleted
);
2607 if (needagain
&& progress
) {
2608 /* do another pass to fix up temporary names */
2610 (void) printf("another pass:\n");
2618 zfs_receive_package(libzfs_handle_t
*hdl
, int fd
, const char *destname
,
2619 recvflags_t
*flags
, dmu_replay_record_t
*drr
, zio_cksum_t
*zc
,
2620 char **top_zfs
, int cleanup_fd
, uint64_t *action_handlep
)
2622 nvlist_t
*stream_nv
= NULL
;
2623 avl_tree_t
*stream_avl
= NULL
;
2624 char *fromsnap
= NULL
;
2625 char *sendsnap
= NULL
;
2627 char tofs
[ZFS_MAX_DATASET_NAME_LEN
];
2628 char sendfs
[ZFS_MAX_DATASET_NAME_LEN
];
2630 dmu_replay_record_t drre
;
2632 boolean_t anyerr
= B_FALSE
;
2633 boolean_t softerr
= B_FALSE
;
2634 boolean_t recursive
;
2636 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2639 assert(drr
->drr_type
== DRR_BEGIN
);
2640 assert(drr
->drr_u
.drr_begin
.drr_magic
== DMU_BACKUP_MAGIC
);
2641 assert(DMU_GET_STREAM_HDRTYPE(drr
->drr_u
.drr_begin
.drr_versioninfo
) ==
2642 DMU_COMPOUNDSTREAM
);
2645 * Read in the nvlist from the stream.
2647 if (drr
->drr_payloadlen
!= 0) {
2648 error
= recv_read_nvlist(hdl
, fd
, drr
->drr_payloadlen
,
2649 &stream_nv
, flags
->byteswap
, zc
);
2651 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2656 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2659 if (recursive
&& strchr(destname
, '@')) {
2660 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2661 "cannot specify snapshot name for multi-snapshot stream"));
2662 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2667 * Read in the end record and verify checksum.
2669 if (0 != (error
= recv_read(hdl
, fd
, &drre
, sizeof (drre
),
2670 flags
->byteswap
, NULL
)))
2672 if (flags
->byteswap
) {
2673 drre
.drr_type
= BSWAP_32(drre
.drr_type
);
2674 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[0] =
2675 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[0]);
2676 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[1] =
2677 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[1]);
2678 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[2] =
2679 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[2]);
2680 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[3] =
2681 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[3]);
2683 if (drre
.drr_type
!= DRR_END
) {
2684 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2687 if (!ZIO_CHECKSUM_EQUAL(drre
.drr_u
.drr_end
.drr_checksum
, *zc
)) {
2688 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2689 "incorrect header checksum"));
2690 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2694 (void) nvlist_lookup_string(stream_nv
, "fromsnap", &fromsnap
);
2696 if (drr
->drr_payloadlen
!= 0) {
2697 nvlist_t
*stream_fss
;
2699 VERIFY(0 == nvlist_lookup_nvlist(stream_nv
, "fss",
2701 if ((stream_avl
= fsavl_create(stream_fss
)) == NULL
) {
2702 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2703 "couldn't allocate avl tree"));
2704 error
= zfs_error(hdl
, EZFS_NOMEM
, errbuf
);
2708 if (fromsnap
!= NULL
) {
2709 nvlist_t
*renamed
= NULL
;
2710 nvpair_t
*pair
= NULL
;
2712 (void) strlcpy(tofs
, destname
, sizeof (tofs
));
2713 if (flags
->isprefix
) {
2714 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
2717 if (flags
->istail
) {
2718 cp
= strrchr(drrb
->drr_toname
, '/');
2720 (void) strlcat(tofs
, "/",
2724 i
= (cp
- drrb
->drr_toname
);
2727 i
= strcspn(drrb
->drr_toname
, "/@");
2729 /* zfs_receive_one() will create_parents() */
2730 (void) strlcat(tofs
, &drrb
->drr_toname
[i
],
2732 *strchr(tofs
, '@') = '\0';
2735 if (recursive
&& !flags
->dryrun
&& !flags
->nomount
) {
2736 VERIFY(0 == nvlist_alloc(&renamed
,
2737 NV_UNIQUE_NAME
, 0));
2740 softerr
= recv_incremental_replication(hdl
, tofs
, flags
,
2741 stream_nv
, stream_avl
, renamed
);
2743 /* Unmount renamed filesystems before receiving. */
2744 while ((pair
= nvlist_next_nvpair(renamed
,
2747 prop_changelist_t
*clp
= NULL
;
2749 zhp
= zfs_open(hdl
, nvpair_name(pair
),
2750 ZFS_TYPE_FILESYSTEM
);
2752 clp
= changelist_gather(zhp
,
2753 ZFS_PROP_MOUNTPOINT
, 0, 0);
2757 changelist_prefix(clp
);
2758 changelist_free(clp
);
2763 nvlist_free(renamed
);
2768 * Get the fs specified by the first path in the stream (the top level
2769 * specified by 'zfs send') and pass it to each invocation of
2770 * zfs_receive_one().
2772 (void) strlcpy(sendfs
, drr
->drr_u
.drr_begin
.drr_toname
,
2774 if ((cp
= strchr(sendfs
, '@')) != NULL
) {
2777 * Find the "sendsnap", the final snapshot in a replication
2778 * stream. zfs_receive_one() handles certain errors
2779 * differently, depending on if the contained stream is the
2782 sendsnap
= (cp
+ 1);
2785 /* Finally, receive each contained stream */
2788 * we should figure out if it has a recoverable
2789 * error, in which case do a recv_skip() and drive on.
2790 * Note, if we fail due to already having this guid,
2791 * zfs_receive_one() will take care of it (ie,
2792 * recv_skip() and return 0).
2794 error
= zfs_receive_impl(hdl
, destname
, NULL
, flags
, fd
,
2795 sendfs
, stream_nv
, stream_avl
, top_zfs
, cleanup_fd
,
2796 action_handlep
, sendsnap
);
2797 if (error
== ENODATA
) {
2802 } while (error
== 0);
2804 if (drr
->drr_payloadlen
!= 0 && fromsnap
!= NULL
) {
2806 * Now that we have the fs's they sent us, try the
2809 softerr
= recv_incremental_replication(hdl
, tofs
, flags
,
2810 stream_nv
, stream_avl
, NULL
);
2814 fsavl_destroy(stream_avl
);
2815 nvlist_free(stream_nv
);
2824 trunc_prop_errs(int truncated
)
2826 ASSERT(truncated
!= 0);
2829 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
2830 "1 more property could not be set\n"));
2832 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
2833 "%d more properties could not be set\n"), truncated
);
2837 recv_skip(libzfs_handle_t
*hdl
, int fd
, boolean_t byteswap
)
2839 dmu_replay_record_t
*drr
;
2840 void *buf
= zfs_alloc(hdl
, SPA_MAXBLOCKSIZE
);
2843 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2844 "cannot receive:"));
2846 /* XXX would be great to use lseek if possible... */
2849 while (recv_read(hdl
, fd
, drr
, sizeof (dmu_replay_record_t
),
2850 byteswap
, NULL
) == 0) {
2852 drr
->drr_type
= BSWAP_32(drr
->drr_type
);
2854 switch (drr
->drr_type
) {
2856 if (drr
->drr_payloadlen
!= 0) {
2857 (void) recv_read(hdl
, fd
, buf
,
2858 drr
->drr_payloadlen
, B_FALSE
, NULL
);
2868 drr
->drr_u
.drr_object
.drr_bonuslen
=
2869 BSWAP_32(drr
->drr_u
.drr_object
.
2872 (void) recv_read(hdl
, fd
, buf
,
2873 P2ROUNDUP(drr
->drr_u
.drr_object
.drr_bonuslen
, 8),
2879 drr
->drr_u
.drr_write
.drr_length
=
2880 BSWAP_64(drr
->drr_u
.drr_write
.drr_length
);
2882 (void) recv_read(hdl
, fd
, buf
,
2883 drr
->drr_u
.drr_write
.drr_length
, B_FALSE
, NULL
);
2887 drr
->drr_u
.drr_spill
.drr_length
=
2888 BSWAP_64(drr
->drr_u
.drr_spill
.drr_length
);
2890 (void) recv_read(hdl
, fd
, buf
,
2891 drr
->drr_u
.drr_spill
.drr_length
, B_FALSE
, NULL
);
2893 case DRR_WRITE_EMBEDDED
:
2895 drr
->drr_u
.drr_write_embedded
.drr_psize
=
2896 BSWAP_32(drr
->drr_u
.drr_write_embedded
.
2899 (void) recv_read(hdl
, fd
, buf
,
2900 P2ROUNDUP(drr
->drr_u
.drr_write_embedded
.drr_psize
,
2903 case DRR_WRITE_BYREF
:
2904 case DRR_FREEOBJECTS
:
2909 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2910 "invalid record type"));
2911 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2920 recv_ecksum_set_aux(libzfs_handle_t
*hdl
, const char *target_snap
,
2921 boolean_t resumable
)
2923 char target_fs
[ZFS_MAX_DATASET_NAME_LEN
];
2925 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2926 "checksum mismatch or incomplete stream"));
2930 (void) strlcpy(target_fs
, target_snap
, sizeof (target_fs
));
2931 *strchr(target_fs
, '@') = '\0';
2932 zfs_handle_t
*zhp
= zfs_open(hdl
, target_fs
,
2933 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
2937 char token_buf
[ZFS_MAXPROPLEN
];
2938 int error
= zfs_prop_get(zhp
, ZFS_PROP_RECEIVE_RESUME_TOKEN
,
2939 token_buf
, sizeof (token_buf
),
2940 NULL
, NULL
, 0, B_TRUE
);
2942 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2943 "checksum mismatch or incomplete stream.\n"
2944 "Partially received snapshot is saved.\n"
2945 "A resuming stream can be generated on the sending "
2946 "system by running:\n"
2954 * Restores a backup of tosnap from the file descriptor specified by infd.
2957 zfs_receive_one(libzfs_handle_t
*hdl
, int infd
, const char *tosnap
,
2958 const char *originsnap
, recvflags_t
*flags
, dmu_replay_record_t
*drr
,
2959 dmu_replay_record_t
*drr_noswap
, const char *sendfs
, nvlist_t
*stream_nv
,
2960 avl_tree_t
*stream_avl
, char **top_zfs
, int cleanup_fd
,
2961 uint64_t *action_handlep
, const char *finalsnap
)
2964 int ioctl_err
, ioctl_errno
, err
;
2966 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
2968 const char *chopprefix
;
2969 boolean_t newfs
= B_FALSE
;
2970 boolean_t stream_wantsnewfs
;
2971 boolean_t newprops
= B_FALSE
;
2972 uint64_t read_bytes
= 0;
2973 uint64_t errflags
= 0;
2974 uint64_t parent_snapguid
= 0;
2975 prop_changelist_t
*clp
= NULL
;
2976 nvlist_t
*snapprops_nvlist
= NULL
;
2977 zprop_errflags_t prop_errflags
;
2978 nvlist_t
*prop_errors
= NULL
;
2979 boolean_t recursive
;
2980 char *snapname
= NULL
;
2981 char destsnap
[MAXPATHLEN
* 2];
2982 char origin
[MAXNAMELEN
];
2983 char name
[MAXPATHLEN
];
2984 nvlist_t
*props
= NULL
;
2986 begin_time
= time(NULL
);
2987 bzero(origin
, MAXNAMELEN
);
2989 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2992 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2995 if (stream_avl
!= NULL
) {
2996 nvlist_t
*fs
= fsavl_find(stream_avl
, drrb
->drr_toguid
,
2999 (void) nvlist_lookup_uint64(fs
, "parentfromsnap",
3001 err
= nvlist_lookup_nvlist(fs
, "props", &props
);
3003 VERIFY(0 == nvlist_alloc(&props
, NV_UNIQUE_NAME
, 0));
3007 if (flags
->canmountoff
) {
3008 VERIFY(0 == nvlist_add_uint64(props
,
3009 zfs_prop_to_name(ZFS_PROP_CANMOUNT
), 0));
3016 * Determine how much of the snapshot name stored in the stream
3017 * we are going to tack on to the name they specified on the
3018 * command line, and how much we are going to chop off.
3020 * If they specified a snapshot, chop the entire name stored in
3023 if (flags
->istail
) {
3025 * A filesystem was specified with -e. We want to tack on only
3026 * the tail of the sent snapshot path.
3028 if (strchr(tosnap
, '@')) {
3029 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
3030 "argument - snapshot not allowed with -e"));
3031 err
= zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
);
3035 chopprefix
= strrchr(sendfs
, '/');
3037 if (chopprefix
== NULL
) {
3039 * The tail is the poolname, so we need to
3040 * prepend a path separator.
3042 int len
= strlen(drrb
->drr_toname
);
3043 cp
= malloc(len
+ 2);
3045 (void) strcpy(&cp
[1], drrb
->drr_toname
);
3048 chopprefix
= drrb
->drr_toname
+ (chopprefix
- sendfs
);
3050 } else if (flags
->isprefix
) {
3052 * A filesystem was specified with -d. We want to tack on
3053 * everything but the first element of the sent snapshot path
3054 * (all but the pool name).
3056 if (strchr(tosnap
, '@')) {
3057 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
3058 "argument - snapshot not allowed with -d"));
3059 err
= zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
);
3063 chopprefix
= strchr(drrb
->drr_toname
, '/');
3064 if (chopprefix
== NULL
)
3065 chopprefix
= strchr(drrb
->drr_toname
, '@');
3066 } else if (strchr(tosnap
, '@') == NULL
) {
3068 * If a filesystem was specified without -d or -e, we want to
3069 * tack on everything after the fs specified by 'zfs send'.
3071 chopprefix
= drrb
->drr_toname
+ strlen(sendfs
);
3073 /* A snapshot was specified as an exact path (no -d or -e). */
3075 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3076 "cannot specify snapshot name for multi-snapshot "
3078 err
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
3081 chopprefix
= drrb
->drr_toname
+ strlen(drrb
->drr_toname
);
3084 ASSERT(strstr(drrb
->drr_toname
, sendfs
) == drrb
->drr_toname
);
3085 ASSERT(chopprefix
> drrb
->drr_toname
);
3086 ASSERT(chopprefix
<= drrb
->drr_toname
+ strlen(drrb
->drr_toname
));
3087 ASSERT(chopprefix
[0] == '/' || chopprefix
[0] == '@' ||
3088 chopprefix
[0] == '\0');
3091 * Determine name of destination snapshot.
3093 (void) strcpy(destsnap
, tosnap
);
3094 (void) strlcat(destsnap
, chopprefix
, sizeof (destsnap
));
3096 if (!zfs_name_valid(destsnap
, ZFS_TYPE_SNAPSHOT
)) {
3097 err
= zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
);
3102 * Determine the name of the origin snapshot.
3104 if (drrb
->drr_flags
& DRR_FLAG_CLONE
) {
3105 if (guid_to_name(hdl
, destsnap
,
3106 drrb
->drr_fromguid
, B_FALSE
, origin
) != 0) {
3107 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3108 "local origin for clone %s does not exist"),
3110 err
= zfs_error(hdl
, EZFS_NOENT
, errbuf
);
3114 (void) printf("found clone origin %s\n", origin
);
3115 } else if (originsnap
) {
3116 (void) strncpy(origin
, originsnap
, sizeof (origin
));
3118 (void) printf("using provided clone origin %s\n",
3122 boolean_t resuming
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
) &
3123 DMU_BACKUP_FEATURE_RESUMING
;
3124 stream_wantsnewfs
= (drrb
->drr_fromguid
== 0 ||
3125 (drrb
->drr_flags
& DRR_FLAG_CLONE
) || originsnap
) && !resuming
;
3127 if (stream_wantsnewfs
) {
3129 * if the parent fs does not exist, look for it based on
3130 * the parent snap GUID
3132 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
3133 "cannot receive new filesystem stream"));
3135 (void) strcpy(name
, destsnap
);
3136 cp
= strrchr(name
, '/');
3140 !zfs_dataset_exists(hdl
, name
, ZFS_TYPE_DATASET
)) {
3141 char suffix
[ZFS_MAX_DATASET_NAME_LEN
];
3142 (void) strcpy(suffix
, strrchr(destsnap
, '/'));
3143 if (guid_to_name(hdl
, name
, parent_snapguid
,
3144 B_FALSE
, destsnap
) == 0) {
3145 *strchr(destsnap
, '@') = '\0';
3146 (void) strcat(destsnap
, suffix
);
3151 * if the fs does not exist, look for it based on the
3154 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
3155 "cannot receive incremental stream"));
3157 (void) strcpy(name
, destsnap
);
3158 *strchr(name
, '@') = '\0';
3161 * If the exact receive path was specified and this is the
3162 * topmost path in the stream, then if the fs does not exist we
3163 * should look no further.
3165 if ((flags
->isprefix
|| (*(chopprefix
= drrb
->drr_toname
+
3166 strlen(sendfs
)) != '\0' && *chopprefix
!= '@')) &&
3167 !zfs_dataset_exists(hdl
, name
, ZFS_TYPE_DATASET
)) {
3168 char snap
[ZFS_MAX_DATASET_NAME_LEN
];
3169 (void) strcpy(snap
, strchr(destsnap
, '@'));
3170 if (guid_to_name(hdl
, name
, drrb
->drr_fromguid
,
3171 B_FALSE
, destsnap
) == 0) {
3172 *strchr(destsnap
, '@') = '\0';
3173 (void) strcat(destsnap
, snap
);
3178 (void) strcpy(name
, destsnap
);
3179 *strchr(name
, '@') = '\0';
3181 if (zfs_dataset_exists(hdl
, name
, ZFS_TYPE_DATASET
)) {
3182 zfs_cmd_t zc
= {"\0"};
3185 (void) strcpy(zc
.zc_name
, name
);
3188 * Destination fs exists. It must be one of these cases:
3189 * - an incremental send stream
3190 * - the stream specifies a new fs (full stream or clone)
3191 * and they want us to blow away the existing fs (and
3192 * have therefore specified -F and removed any snapshots)
3193 * - we are resuming a failed receive.
3195 if (stream_wantsnewfs
) {
3196 if (!flags
->force
) {
3197 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3198 "destination '%s' exists\n"
3199 "must specify -F to overwrite it"), name
);
3200 err
= zfs_error(hdl
, EZFS_EXISTS
, errbuf
);
3203 if (ioctl(hdl
->libzfs_fd
, ZFS_IOC_SNAPSHOT_LIST_NEXT
,
3205 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3206 "destination has snapshots (eg. %s)\n"
3207 "must destroy them to overwrite it"),
3209 err
= zfs_error(hdl
, EZFS_EXISTS
, errbuf
);
3214 if ((zhp
= zfs_open(hdl
, name
,
3215 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
)) == NULL
) {
3220 if (stream_wantsnewfs
&&
3221 zhp
->zfs_dmustats
.dds_origin
[0]) {
3223 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3224 "destination '%s' is a clone\n"
3225 "must destroy it to overwrite it"), name
);
3226 err
= zfs_error(hdl
, EZFS_EXISTS
, errbuf
);
3230 if (!flags
->dryrun
&& zhp
->zfs_type
== ZFS_TYPE_FILESYSTEM
&&
3231 stream_wantsnewfs
) {
3232 /* We can't do online recv in this case */
3233 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0, 0);
3239 if (changelist_prefix(clp
) != 0) {
3240 changelist_free(clp
);
3248 * If we are resuming a newfs, set newfs here so that we will
3249 * mount it if the recv succeeds this time. We can tell
3250 * that it was a newfs on the first recv because the fs
3251 * itself will be inconsistent (if the fs existed when we
3252 * did the first recv, we would have received it into
3255 if (resuming
&& zfs_prop_get_int(zhp
, ZFS_PROP_INCONSISTENT
))
3261 * Destination filesystem does not exist. Therefore we better
3262 * be creating a new filesystem (either from a full backup, or
3263 * a clone). It would therefore be invalid if the user
3264 * specified only the pool name (i.e. if the destination name
3265 * contained no slash character).
3267 if (!stream_wantsnewfs
||
3268 (cp
= strrchr(name
, '/')) == NULL
) {
3269 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3270 "destination '%s' does not exist"), name
);
3271 err
= zfs_error(hdl
, EZFS_NOENT
, errbuf
);
3276 * Trim off the final dataset component so we perform the
3277 * recvbackup ioctl to the filesystems's parent.
3281 if (flags
->isprefix
&& !flags
->istail
&& !flags
->dryrun
&&
3282 create_parents(hdl
, destsnap
, strlen(tosnap
)) != 0) {
3283 err
= zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
3290 if (flags
->verbose
) {
3291 (void) printf("%s %s stream of %s into %s\n",
3292 flags
->dryrun
? "would receive" : "receiving",
3293 drrb
->drr_fromguid
? "incremental" : "full",
3294 drrb
->drr_toname
, destsnap
);
3295 (void) fflush(stdout
);
3298 if (flags
->dryrun
) {
3299 err
= recv_skip(hdl
, infd
, flags
->byteswap
);
3303 err
= ioctl_err
= lzc_receive_one(destsnap
, props
, origin
,
3304 flags
->force
, flags
->resumable
, infd
, drr_noswap
, cleanup_fd
,
3305 &read_bytes
, &errflags
, action_handlep
, &prop_errors
);
3306 ioctl_errno
= ioctl_err
;
3307 prop_errflags
= errflags
;
3310 nvpair_t
*prop_err
= NULL
;
3312 while ((prop_err
= nvlist_next_nvpair(prop_errors
,
3313 prop_err
)) != NULL
) {
3318 prop
= zfs_name_to_prop(nvpair_name(prop_err
));
3319 (void) nvpair_value_int32(prop_err
, &intval
);
3320 if (strcmp(nvpair_name(prop_err
),
3321 ZPROP_N_MORE_ERRORS
) == 0) {
3322 trunc_prop_errs(intval
);
3324 } else if (snapname
== NULL
|| finalsnap
== NULL
||
3325 strcmp(finalsnap
, snapname
) == 0 ||
3326 strcmp(nvpair_name(prop_err
),
3327 zfs_prop_to_name(ZFS_PROP_REFQUOTA
)) != 0) {
3329 * Skip the special case of, for example,
3330 * "refquota", errors on intermediate
3331 * snapshots leading up to a final one.
3332 * That's why we have all of the checks above.
3334 * See zfs_ioctl.c's extract_delay_props() for
3335 * a list of props which can fail on
3336 * intermediate snapshots, but shouldn't
3337 * affect the overall receive.
3339 (void) snprintf(tbuf
, sizeof (tbuf
),
3340 dgettext(TEXT_DOMAIN
,
3341 "cannot receive %s property on %s"),
3342 nvpair_name(prop_err
), name
);
3343 zfs_setprop_error(hdl
, prop
, intval
, tbuf
);
3348 if (err
== 0 && snapprops_nvlist
) {
3349 zfs_cmd_t zc
= {"\0"};
3351 (void) strcpy(zc
.zc_name
, destsnap
);
3352 zc
.zc_cookie
= B_TRUE
; /* received */
3353 if (zcmd_write_src_nvlist(hdl
, &zc
, snapprops_nvlist
) == 0) {
3354 (void) zfs_ioctl(hdl
, ZFS_IOC_SET_PROP
, &zc
);
3355 zcmd_free_nvlists(&zc
);
3359 if (err
&& (ioctl_errno
== ENOENT
|| ioctl_errno
== EEXIST
)) {
3361 * It may be that this snapshot already exists,
3362 * in which case we want to consume & ignore it
3363 * rather than failing.
3365 avl_tree_t
*local_avl
;
3366 nvlist_t
*local_nv
, *fs
;
3367 cp
= strchr(destsnap
, '@');
3370 * XXX Do this faster by just iterating over snaps in
3371 * this fs. Also if zc_value does not exist, we will
3372 * get a strange "does not exist" error message.
3375 if (gather_nvlist(hdl
, destsnap
, NULL
, NULL
, B_FALSE
,
3376 &local_nv
, &local_avl
) == 0) {
3378 fs
= fsavl_find(local_avl
, drrb
->drr_toguid
, NULL
);
3379 fsavl_destroy(local_avl
);
3380 nvlist_free(local_nv
);
3383 if (flags
->verbose
) {
3384 (void) printf("snap %s already exists; "
3385 "ignoring\n", destsnap
);
3387 err
= ioctl_err
= recv_skip(hdl
, infd
,
3394 if (ioctl_err
!= 0) {
3395 switch (ioctl_errno
) {
3397 cp
= strchr(destsnap
, '@');
3399 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3400 "most recent snapshot of %s does not\n"
3401 "match incremental source"), destsnap
);
3402 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
3406 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3407 "destination %s has been modified\n"
3408 "since most recent snapshot"), name
);
3409 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
3412 cp
= strchr(destsnap
, '@');
3414 /* it's the containing fs that exists */
3417 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3418 "destination already exists"));
3419 (void) zfs_error_fmt(hdl
, EZFS_EXISTS
,
3420 dgettext(TEXT_DOMAIN
, "cannot restore to %s"),
3425 if (flags
->resumable
)
3426 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3427 "kernel modules must be upgraded to "
3428 "receive this stream."));
3429 (void) zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
3432 recv_ecksum_set_aux(hdl
, destsnap
, flags
->resumable
);
3433 (void) zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
3436 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3437 "pool must be upgraded to receive this stream."));
3438 (void) zfs_error(hdl
, EZFS_BADVERSION
, errbuf
);
3441 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3442 "destination %s space quota exceeded"), name
);
3443 (void) zfs_error(hdl
, EZFS_NOSPC
, errbuf
);
3446 (void) zfs_standard_error(hdl
, ioctl_errno
, errbuf
);
3451 * Mount the target filesystem (if created). Also mount any
3452 * children of the target filesystem if we did a replication
3453 * receive (indicated by stream_avl being non-NULL).
3455 cp
= strchr(destsnap
, '@');
3456 if (cp
&& (ioctl_err
== 0 || !newfs
)) {
3460 h
= zfs_open(hdl
, destsnap
,
3461 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
3463 if (h
->zfs_type
== ZFS_TYPE_VOLUME
) {
3465 } else if (newfs
|| stream_avl
) {
3467 * Track the first/top of hierarchy fs,
3468 * for mounting and sharing later.
3470 if (top_zfs
&& *top_zfs
== NULL
)
3471 *top_zfs
= zfs_strdup(hdl
, destsnap
);
3479 err
|= changelist_postfix(clp
);
3480 changelist_free(clp
);
3483 if (prop_errflags
& ZPROP_ERR_NOCLEAR
) {
3484 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
, "Warning: "
3485 "failed to clear unreceived properties on %s"), name
);
3486 (void) fprintf(stderr
, "\n");
3488 if (prop_errflags
& ZPROP_ERR_NORESTORE
) {
3489 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
, "Warning: "
3490 "failed to restore original properties on %s"), name
);
3491 (void) fprintf(stderr
, "\n");
3494 if (err
|| ioctl_err
) {
3499 if (flags
->verbose
) {
3502 uint64_t bytes
= read_bytes
;
3503 time_t delta
= time(NULL
) - begin_time
;
3506 zfs_nicenum(bytes
, buf1
, sizeof (buf1
));
3507 zfs_nicenum(bytes
/delta
, buf2
, sizeof (buf1
));
3509 (void) printf("received %sB stream in %lu seconds (%sB/sec)\n",
3515 if (prop_errors
!= NULL
)
3516 nvlist_free(prop_errors
);
3525 zfs_receive_impl(libzfs_handle_t
*hdl
, const char *tosnap
,
3526 const char *originsnap
, recvflags_t
*flags
, int infd
, const char *sendfs
,
3527 nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
, char **top_zfs
, int cleanup_fd
,
3528 uint64_t *action_handlep
, const char *finalsnap
)
3531 dmu_replay_record_t drr
, drr_noswap
;
3532 struct drr_begin
*drrb
= &drr
.drr_u
.drr_begin
;
3534 zio_cksum_t zcksum
= { { 0 } };
3535 uint64_t featureflags
;
3538 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
3541 if (flags
->isprefix
&&
3542 !zfs_dataset_exists(hdl
, tosnap
, ZFS_TYPE_DATASET
)) {
3543 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "specified fs "
3544 "(%s) does not exist"), tosnap
);
3545 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
3548 !zfs_dataset_exists(hdl
, originsnap
, ZFS_TYPE_DATASET
)) {
3549 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "specified origin fs "
3550 "(%s) does not exist"), originsnap
);
3551 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
3554 /* read in the BEGIN record */
3555 if (0 != (err
= recv_read(hdl
, infd
, &drr
, sizeof (drr
), B_FALSE
,
3559 if (drr
.drr_type
== DRR_END
|| drr
.drr_type
== BSWAP_32(DRR_END
)) {
3560 /* It's the double end record at the end of a package */
3564 /* the kernel needs the non-byteswapped begin record */
3567 flags
->byteswap
= B_FALSE
;
3568 if (drrb
->drr_magic
== BSWAP_64(DMU_BACKUP_MAGIC
)) {
3570 * We computed the checksum in the wrong byteorder in
3571 * recv_read() above; do it again correctly.
3573 bzero(&zcksum
, sizeof (zio_cksum_t
));
3574 fletcher_4_incremental_byteswap(&drr
, sizeof (drr
), &zcksum
);
3575 flags
->byteswap
= B_TRUE
;
3577 drr
.drr_type
= BSWAP_32(drr
.drr_type
);
3578 drr
.drr_payloadlen
= BSWAP_32(drr
.drr_payloadlen
);
3579 drrb
->drr_magic
= BSWAP_64(drrb
->drr_magic
);
3580 drrb
->drr_versioninfo
= BSWAP_64(drrb
->drr_versioninfo
);
3581 drrb
->drr_creation_time
= BSWAP_64(drrb
->drr_creation_time
);
3582 drrb
->drr_type
= BSWAP_32(drrb
->drr_type
);
3583 drrb
->drr_flags
= BSWAP_32(drrb
->drr_flags
);
3584 drrb
->drr_toguid
= BSWAP_64(drrb
->drr_toguid
);
3585 drrb
->drr_fromguid
= BSWAP_64(drrb
->drr_fromguid
);
3588 if (drrb
->drr_magic
!= DMU_BACKUP_MAGIC
|| drr
.drr_type
!= DRR_BEGIN
) {
3589 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
3590 "stream (bad magic number)"));
3591 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
3594 featureflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
3595 hdrtype
= DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
);
3597 if (!DMU_STREAM_SUPPORTED(featureflags
) ||
3598 (hdrtype
!= DMU_SUBSTREAM
&& hdrtype
!= DMU_COMPOUNDSTREAM
)) {
3599 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3600 "stream has unsupported feature, feature flags = %lx"),
3602 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
3605 if (strchr(drrb
->drr_toname
, '@') == NULL
) {
3606 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
3607 "stream (bad snapshot name)"));
3608 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
3611 if (DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) == DMU_SUBSTREAM
) {
3612 char nonpackage_sendfs
[ZFS_MAX_DATASET_NAME_LEN
];
3613 if (sendfs
== NULL
) {
3615 * We were not called from zfs_receive_package(). Get
3616 * the fs specified by 'zfs send'.
3619 (void) strlcpy(nonpackage_sendfs
,
3620 drr
.drr_u
.drr_begin
.drr_toname
,
3621 sizeof (nonpackage_sendfs
));
3622 if ((cp
= strchr(nonpackage_sendfs
, '@')) != NULL
)
3624 sendfs
= nonpackage_sendfs
;
3625 VERIFY(finalsnap
== NULL
);
3627 return (zfs_receive_one(hdl
, infd
, tosnap
, originsnap
, flags
,
3628 &drr
, &drr_noswap
, sendfs
, stream_nv
, stream_avl
, top_zfs
,
3629 cleanup_fd
, action_handlep
, finalsnap
));
3631 assert(DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) ==
3632 DMU_COMPOUNDSTREAM
);
3633 return (zfs_receive_package(hdl
, infd
, tosnap
, flags
, &drr
,
3634 &zcksum
, top_zfs
, cleanup_fd
, action_handlep
));
3639 * Restores a backup of tosnap from the file descriptor specified by infd.
3640 * Return 0 on total success, -2 if some things couldn't be
3641 * destroyed/renamed/promoted, -1 if some things couldn't be received.
3642 * (-1 will override -2, if -1 and the resumable flag was specified the
3643 * transfer can be resumed if the sending side supports it).
3646 zfs_receive(libzfs_handle_t
*hdl
, const char *tosnap
, nvlist_t
*props
,
3647 recvflags_t
*flags
, int infd
, avl_tree_t
*stream_avl
)
3649 char *top_zfs
= NULL
;
3652 uint64_t action_handle
= 0;
3654 char *originsnap
= NULL
;
3657 * The only way fstat can fail is if we do not have a valid file
3660 if (fstat(infd
, &sb
) == -1) {
3666 #ifndef F_SETPIPE_SZ
3667 #define F_SETPIPE_SZ (F_SETLEASE + 7)
3668 #endif /* F_SETPIPE_SZ */
3670 #ifndef F_GETPIPE_SZ
3671 #define F_GETPIPE_SZ (F_GETLEASE + 7)
3672 #endif /* F_GETPIPE_SZ */
3675 * It is not uncommon for gigabytes to be processed in zfs receive.
3676 * Speculatively increase the buffer size via Linux-specific fcntl()
3679 if (S_ISFIFO(sb
.st_mode
)) {
3680 FILE *procf
= fopen("/proc/sys/fs/pipe-max-size", "r");
3682 if (procf
!= NULL
) {
3683 unsigned long max_psize
;
3685 if (fscanf(procf
, "%lu", &max_psize
) > 0) {
3686 cur_psize
= fcntl(infd
, F_GETPIPE_SZ
);
3687 if (cur_psize
> 0 &&
3688 max_psize
> (unsigned long) cur_psize
)
3689 (void) fcntl(infd
, F_SETPIPE_SZ
,
3695 #endif /* __linux__ */
3698 err
= nvlist_lookup_string(props
, "origin", &originsnap
);
3699 if (err
&& err
!= ENOENT
)
3703 cleanup_fd
= open(ZFS_DEV
, O_RDWR
);
3704 VERIFY(cleanup_fd
>= 0);
3706 err
= zfs_receive_impl(hdl
, tosnap
, originsnap
, flags
, infd
, NULL
, NULL
,
3707 stream_avl
, &top_zfs
, cleanup_fd
, &action_handle
, NULL
);
3709 VERIFY(0 == close(cleanup_fd
));
3711 if (err
== 0 && !flags
->nomount
&& top_zfs
) {
3713 prop_changelist_t
*clp
;
3715 zhp
= zfs_open(hdl
, top_zfs
, ZFS_TYPE_FILESYSTEM
);
3717 clp
= changelist_gather(zhp
, ZFS_PROP_MOUNTPOINT
,
3718 CL_GATHER_MOUNT_ALWAYS
, 0);
3721 /* mount and share received datasets */
3722 err
= changelist_postfix(clp
);
3723 changelist_free(clp
);
3726 if (zhp
== NULL
|| clp
== NULL
|| err
)