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.
36 #include <sys/mount.h>
42 #include "zfs_namecheck.h"
44 #include "zfs_fletcher.h"
45 #include "libzfs_impl.h"
47 #include <sys/zio_checksum.h>
50 /* in libzfs_dataset.c */
51 extern void zfs_setprop_error(libzfs_handle_t
*, zfs_prop_t
, int, char *);
53 static int zfs_receive_impl(libzfs_handle_t
*, const char *, recvflags_t
,
54 int, const char *, nvlist_t
*, avl_tree_t
*, char **, int, uint64_t *);
56 static const zio_cksum_t zero_cksum
= { 0 };
58 typedef struct dedup_arg
{
61 libzfs_handle_t
*dedup_hdl
;
64 typedef struct dataref
{
70 typedef struct dedup_entry
{
71 struct dedup_entry
*dde_next
;
72 zio_cksum_t dde_chksum
;
77 #define MAX_DDT_PHYSMEM_PERCENT 20
78 #define SMALLEST_POSSIBLE_MAX_DDT_MB 128
80 typedef struct dedup_table
{
81 dedup_entry_t
**dedup_hash_array
;
82 umem_cache_t
*ddecache
;
83 uint64_t max_ddt_size
; /* max dedup table size in bytes */
84 uint64_t cur_ddt_size
; /* current dedup table size in bytes */
91 high_order_bit(uint64_t n
)
95 for (count
= 0; n
!= 0; count
++)
101 ssread(void *buf
, size_t len
, FILE *stream
)
105 if ((outlen
= fread(buf
, len
, 1, stream
)) == 0)
112 ddt_hash_append(libzfs_handle_t
*hdl
, dedup_table_t
*ddt
, dedup_entry_t
**ddepp
,
113 zio_cksum_t
*cs
, uint64_t prop
, dataref_t
*dr
)
117 if (ddt
->cur_ddt_size
>= ddt
->max_ddt_size
) {
118 if (ddt
->ddt_full
== B_FALSE
) {
119 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
120 "Dedup table full. Deduplication will continue "
121 "with existing table entries"));
122 ddt
->ddt_full
= B_TRUE
;
127 if ((dde
= umem_cache_alloc(ddt
->ddecache
, UMEM_DEFAULT
))
129 assert(*ddepp
== NULL
);
130 dde
->dde_next
= NULL
;
131 dde
->dde_chksum
= *cs
;
132 dde
->dde_prop
= prop
;
135 ddt
->cur_ddt_size
+= sizeof (dedup_entry_t
);
141 * Using the specified dedup table, do a lookup for an entry with
142 * the checksum cs. If found, return the block's reference info
143 * in *dr. Otherwise, insert a new entry in the dedup table, using
144 * the reference information specified by *dr.
146 * return value: true - entry was found
147 * false - entry was not found
150 ddt_update(libzfs_handle_t
*hdl
, dedup_table_t
*ddt
, zio_cksum_t
*cs
,
151 uint64_t prop
, dataref_t
*dr
)
154 dedup_entry_t
**ddepp
;
156 hashcode
= BF64_GET(cs
->zc_word
[0], 0, ddt
->numhashbits
);
158 for (ddepp
= &(ddt
->dedup_hash_array
[hashcode
]); *ddepp
!= NULL
;
159 ddepp
= &((*ddepp
)->dde_next
)) {
160 if (ZIO_CHECKSUM_EQUAL(((*ddepp
)->dde_chksum
), *cs
) &&
161 (*ddepp
)->dde_prop
== prop
) {
162 *dr
= (*ddepp
)->dde_ref
;
166 ddt_hash_append(hdl
, ddt
, ddepp
, cs
, prop
, dr
);
171 cksum_and_write(const void *buf
, uint64_t len
, zio_cksum_t
*zc
, int outfd
)
173 fletcher_4_incremental_native(buf
, len
, zc
);
174 return (write(outfd
, buf
, len
));
178 * This function is started in a separate thread when the dedup option
179 * has been requested. The main send thread determines the list of
180 * snapshots to be included in the send stream and makes the ioctl calls
181 * for each one. But instead of having the ioctl send the output to the
182 * the output fd specified by the caller of zfs_send()), the
183 * ioctl is told to direct the output to a pipe, which is read by the
184 * alternate thread running THIS function. This function does the
186 * 1. building a dedup table (the DDT)
187 * 2. doing checksums on each data block and inserting a record in the DDT
188 * 3. looking for matching checksums, and
189 * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever
190 * a duplicate block is found.
191 * The output of this function then goes to the output fd requested
192 * by the caller of zfs_send().
197 dedup_arg_t
*dda
= arg
;
198 char *buf
= malloc(1<<20);
199 dmu_replay_record_t thedrr
;
200 dmu_replay_record_t
*drr
= &thedrr
;
201 struct drr_begin
*drrb
= &thedrr
.drr_u
.drr_begin
;
202 struct drr_end
*drre
= &thedrr
.drr_u
.drr_end
;
203 struct drr_object
*drro
= &thedrr
.drr_u
.drr_object
;
204 struct drr_write
*drrw
= &thedrr
.drr_u
.drr_write
;
205 struct drr_spill
*drrs
= &thedrr
.drr_u
.drr_spill
;
208 dmu_replay_record_t wbr_drr
= {0};
209 struct drr_write_byref
*wbr_drrr
= &wbr_drr
.drr_u
.drr_write_byref
;
211 zio_cksum_t stream_cksum
;
212 uint64_t physmem
= sysconf(_SC_PHYS_PAGES
) * sysconf(_SC_PAGESIZE
);
216 MAX((physmem
* MAX_DDT_PHYSMEM_PERCENT
)/100,
217 SMALLEST_POSSIBLE_MAX_DDT_MB
<<20);
219 numbuckets
= ddt
.max_ddt_size
/(sizeof (dedup_entry_t
));
222 * numbuckets must be a power of 2. Increase number to
223 * a power of 2 if necessary.
225 if (!ISP2(numbuckets
))
226 numbuckets
= 1 << high_order_bit(numbuckets
);
228 ddt
.dedup_hash_array
= calloc(numbuckets
, sizeof (dedup_entry_t
*));
229 ddt
.ddecache
= umem_cache_create("dde", sizeof (dedup_entry_t
), 0,
230 NULL
, NULL
, NULL
, NULL
, NULL
, 0);
231 ddt
.cur_ddt_size
= numbuckets
* sizeof (dedup_entry_t
*);
232 ddt
.numhashbits
= high_order_bit(numbuckets
) - 1;
233 ddt
.ddt_full
= B_FALSE
;
235 /* Initialize the write-by-reference block. */
236 wbr_drr
.drr_type
= DRR_WRITE_BYREF
;
237 wbr_drr
.drr_payloadlen
= 0;
239 outfd
= dda
->outputfd
;
240 ofp
= fdopen(dda
->inputfd
, "r");
241 while (ssread(drr
, sizeof (dmu_replay_record_t
), ofp
) != 0) {
243 switch (drr
->drr_type
) {
247 ZIO_SET_CHECKSUM(&stream_cksum
, 0, 0, 0, 0);
249 /* set the DEDUP feature flag for this stream */
250 fflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
251 fflags
|= (DMU_BACKUP_FEATURE_DEDUP
|
252 DMU_BACKUP_FEATURE_DEDUPPROPS
);
253 DMU_SET_FEATUREFLAGS(drrb
->drr_versioninfo
, fflags
);
255 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
256 &stream_cksum
, outfd
) == -1)
258 if (DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) ==
259 DMU_COMPOUNDSTREAM
&& drr
->drr_payloadlen
!= 0) {
260 int sz
= drr
->drr_payloadlen
;
266 (void) ssread(buf
, sz
, ofp
);
269 if (cksum_and_write(buf
, sz
, &stream_cksum
,
278 /* use the recalculated checksum */
279 ZIO_SET_CHECKSUM(&drre
->drr_checksum
,
280 stream_cksum
.zc_word
[0], stream_cksum
.zc_word
[1],
281 stream_cksum
.zc_word
[2], stream_cksum
.zc_word
[3]);
282 if ((write(outfd
, drr
,
283 sizeof (dmu_replay_record_t
))) == -1)
290 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
291 &stream_cksum
, outfd
) == -1)
293 if (drro
->drr_bonuslen
> 0) {
295 P2ROUNDUP((uint64_t)drro
->drr_bonuslen
, 8),
297 if (cksum_and_write(buf
,
298 P2ROUNDUP((uint64_t)drro
->drr_bonuslen
, 8),
299 &stream_cksum
, outfd
) == -1)
307 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
308 &stream_cksum
, outfd
) == -1)
310 (void) ssread(buf
, drrs
->drr_length
, ofp
);
311 if (cksum_and_write(buf
, drrs
->drr_length
,
312 &stream_cksum
, outfd
) == -1)
317 case DRR_FREEOBJECTS
:
319 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
320 &stream_cksum
, outfd
) == -1)
329 (void) ssread(buf
, drrw
->drr_length
, ofp
);
332 * Use the existing checksum if it's dedup-capable,
333 * else calculate a SHA256 checksum for it.
336 if (ZIO_CHECKSUM_EQUAL(drrw
->drr_key
.ddk_cksum
,
338 !DRR_IS_DEDUP_CAPABLE(drrw
->drr_checksumflags
)) {
340 zio_cksum_t tmpsha256
;
343 SHA256Update(&ctx
, buf
, drrw
->drr_length
);
344 SHA256Final(&tmpsha256
, &ctx
);
345 drrw
->drr_key
.ddk_cksum
.zc_word
[0] =
346 BE_64(tmpsha256
.zc_word
[0]);
347 drrw
->drr_key
.ddk_cksum
.zc_word
[1] =
348 BE_64(tmpsha256
.zc_word
[1]);
349 drrw
->drr_key
.ddk_cksum
.zc_word
[2] =
350 BE_64(tmpsha256
.zc_word
[2]);
351 drrw
->drr_key
.ddk_cksum
.zc_word
[3] =
352 BE_64(tmpsha256
.zc_word
[3]);
353 drrw
->drr_checksumtype
= ZIO_CHECKSUM_SHA256
;
354 drrw
->drr_checksumflags
= DRR_CHECKSUM_DEDUP
;
357 dataref
.ref_guid
= drrw
->drr_toguid
;
358 dataref
.ref_object
= drrw
->drr_object
;
359 dataref
.ref_offset
= drrw
->drr_offset
;
361 if (ddt_update(dda
->dedup_hdl
, &ddt
,
362 &drrw
->drr_key
.ddk_cksum
, drrw
->drr_key
.ddk_prop
,
364 /* block already present in stream */
365 wbr_drrr
->drr_object
= drrw
->drr_object
;
366 wbr_drrr
->drr_offset
= drrw
->drr_offset
;
367 wbr_drrr
->drr_length
= drrw
->drr_length
;
368 wbr_drrr
->drr_toguid
= drrw
->drr_toguid
;
369 wbr_drrr
->drr_refguid
= dataref
.ref_guid
;
370 wbr_drrr
->drr_refobject
=
372 wbr_drrr
->drr_refoffset
=
375 wbr_drrr
->drr_checksumtype
=
376 drrw
->drr_checksumtype
;
377 wbr_drrr
->drr_checksumflags
=
378 drrw
->drr_checksumtype
;
379 wbr_drrr
->drr_key
.ddk_cksum
=
380 drrw
->drr_key
.ddk_cksum
;
381 wbr_drrr
->drr_key
.ddk_prop
=
382 drrw
->drr_key
.ddk_prop
;
384 if (cksum_and_write(&wbr_drr
,
385 sizeof (dmu_replay_record_t
), &stream_cksum
,
389 /* block not previously seen */
390 if (cksum_and_write(drr
,
391 sizeof (dmu_replay_record_t
), &stream_cksum
,
394 if (cksum_and_write(buf
,
396 &stream_cksum
, outfd
) == -1)
404 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
405 &stream_cksum
, outfd
) == -1)
411 (void) printf("INVALID record type 0x%x\n",
413 /* should never happen, so assert */
418 umem_cache_destroy(ddt
.ddecache
);
419 free(ddt
.dedup_hash_array
);
427 * Routines for dealing with the AVL tree of fs-nvlists
429 typedef struct fsavl_node
{
437 fsavl_compare(const void *arg1
, const void *arg2
)
439 const fsavl_node_t
*fn1
= arg1
;
440 const fsavl_node_t
*fn2
= arg2
;
442 if (fn1
->fn_guid
> fn2
->fn_guid
)
444 else if (fn1
->fn_guid
< fn2
->fn_guid
)
451 * Given the GUID of a snapshot, find its containing filesystem and
455 fsavl_find(avl_tree_t
*avl
, uint64_t snapguid
, char **snapname
)
457 fsavl_node_t fn_find
;
460 fn_find
.fn_guid
= snapguid
;
462 fn
= avl_find(avl
, &fn_find
, NULL
);
465 *snapname
= fn
->fn_snapname
;
466 return (fn
->fn_nvfs
);
472 fsavl_destroy(avl_tree_t
*avl
)
481 while ((fn
= avl_destroy_nodes(avl
, &cookie
)) != NULL
)
488 * Given an nvlist, produce an avl tree of snapshots, ordered by guid
491 fsavl_create(nvlist_t
*fss
)
494 nvpair_t
*fselem
= NULL
;
496 if ((fsavl
= malloc(sizeof (avl_tree_t
))) == NULL
)
499 avl_create(fsavl
, fsavl_compare
, sizeof (fsavl_node_t
),
500 offsetof(fsavl_node_t
, fn_node
));
502 while ((fselem
= nvlist_next_nvpair(fss
, fselem
)) != NULL
) {
503 nvlist_t
*nvfs
, *snaps
;
504 nvpair_t
*snapelem
= NULL
;
506 VERIFY(0 == nvpair_value_nvlist(fselem
, &nvfs
));
507 VERIFY(0 == nvlist_lookup_nvlist(nvfs
, "snaps", &snaps
));
510 nvlist_next_nvpair(snaps
, snapelem
)) != NULL
) {
514 VERIFY(0 == nvpair_value_uint64(snapelem
, &guid
));
515 if ((fn
= malloc(sizeof (fsavl_node_t
))) == NULL
) {
516 fsavl_destroy(fsavl
);
520 fn
->fn_snapname
= nvpair_name(snapelem
);
524 * Note: if there are multiple snaps with the
525 * same GUID, we ignore all but one.
527 if (avl_find(fsavl
, fn
, NULL
) == NULL
)
538 * Routines for dealing with the giant nvlist of fs-nvlists, etc.
540 typedef struct send_data
{
541 uint64_t parent_fromsnap_guid
;
542 nvlist_t
*parent_snaps
;
545 const char *fromsnap
;
550 * The header nvlist is of the following format:
553 * "fromsnap" -> string (if incremental)
557 * "name" -> string (full name; for debugging)
558 * "parentfromsnap" -> number (guid of fromsnap in parent)
560 * "props" -> { name -> value (only if set here) }
561 * "snaps" -> { name (lastname) -> number (guid) }
562 * "snapprops" -> { name (lastname) -> { name -> value } }
564 * "origin" -> number (guid) (if clone)
565 * "sent" -> boolean (not on-disk)
573 static void send_iterate_prop(zfs_handle_t
*zhp
, nvlist_t
*nv
);
576 send_iterate_snap(zfs_handle_t
*zhp
, void *arg
)
578 send_data_t
*sd
= arg
;
579 uint64_t guid
= zhp
->zfs_dmustats
.dds_guid
;
583 snapname
= strrchr(zhp
->zfs_name
, '@')+1;
585 VERIFY(0 == nvlist_add_uint64(sd
->parent_snaps
, snapname
, guid
));
587 * NB: if there is no fromsnap here (it's a newly created fs in
588 * an incremental replication), we will substitute the tosnap.
590 if ((sd
->fromsnap
&& strcmp(snapname
, sd
->fromsnap
) == 0) ||
591 (sd
->parent_fromsnap_guid
== 0 && sd
->tosnap
&&
592 strcmp(snapname
, sd
->tosnap
) == 0)) {
593 sd
->parent_fromsnap_guid
= guid
;
596 VERIFY(0 == nvlist_alloc(&nv
, NV_UNIQUE_NAME
, 0));
597 send_iterate_prop(zhp
, nv
);
598 VERIFY(0 == nvlist_add_nvlist(sd
->snapprops
, snapname
, nv
));
606 send_iterate_prop(zfs_handle_t
*zhp
, nvlist_t
*nv
)
608 nvpair_t
*elem
= NULL
;
610 while ((elem
= nvlist_next_nvpair(zhp
->zfs_props
, elem
)) != NULL
) {
611 char *propname
= nvpair_name(elem
);
612 zfs_prop_t prop
= zfs_name_to_prop(propname
);
615 if (!zfs_prop_user(propname
)) {
617 * Realistically, this should never happen. However,
618 * we want the ability to add DSL properties without
619 * needing to make incompatible version changes. We
620 * need to ignore unknown properties to allow older
621 * software to still send datasets containing these
622 * properties, with the unknown properties elided.
624 if (prop
== ZPROP_INVAL
)
627 if (zfs_prop_readonly(prop
))
631 verify(nvpair_value_nvlist(elem
, &propnv
) == 0);
632 if (prop
== ZFS_PROP_QUOTA
|| prop
== ZFS_PROP_RESERVATION
||
633 prop
== ZFS_PROP_REFQUOTA
||
634 prop
== ZFS_PROP_REFRESERVATION
) {
637 verify(nvlist_lookup_uint64(propnv
,
638 ZPROP_VALUE
, &value
) == 0);
639 if (zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
)
642 * May have no source before SPA_VERSION_RECVD_PROPS,
643 * but is still modifiable.
645 if (nvlist_lookup_string(propnv
,
646 ZPROP_SOURCE
, &source
) == 0) {
647 if ((strcmp(source
, zhp
->zfs_name
) != 0) &&
649 ZPROP_SOURCE_VAL_RECVD
) != 0))
654 if (nvlist_lookup_string(propnv
,
655 ZPROP_SOURCE
, &source
) != 0)
657 if ((strcmp(source
, zhp
->zfs_name
) != 0) &&
658 (strcmp(source
, ZPROP_SOURCE_VAL_RECVD
) != 0))
662 if (zfs_prop_user(propname
) ||
663 zfs_prop_get_type(prop
) == PROP_TYPE_STRING
) {
665 verify(nvlist_lookup_string(propnv
,
666 ZPROP_VALUE
, &value
) == 0);
667 VERIFY(0 == nvlist_add_string(nv
, propname
, value
));
670 verify(nvlist_lookup_uint64(propnv
,
671 ZPROP_VALUE
, &value
) == 0);
672 VERIFY(0 == nvlist_add_uint64(nv
, propname
, value
));
678 * recursively generate nvlists describing datasets. See comment
679 * for the data structure send_data_t above for description of contents
683 send_iterate_fs(zfs_handle_t
*zhp
, void *arg
)
685 send_data_t
*sd
= arg
;
688 uint64_t parent_fromsnap_guid_save
= sd
->parent_fromsnap_guid
;
689 uint64_t guid
= zhp
->zfs_dmustats
.dds_guid
;
692 VERIFY(0 == nvlist_alloc(&nvfs
, NV_UNIQUE_NAME
, 0));
693 VERIFY(0 == nvlist_add_string(nvfs
, "name", zhp
->zfs_name
));
694 VERIFY(0 == nvlist_add_uint64(nvfs
, "parentfromsnap",
695 sd
->parent_fromsnap_guid
));
697 if (zhp
->zfs_dmustats
.dds_origin
[0]) {
698 zfs_handle_t
*origin
= zfs_open(zhp
->zfs_hdl
,
699 zhp
->zfs_dmustats
.dds_origin
, ZFS_TYPE_SNAPSHOT
);
702 VERIFY(0 == nvlist_add_uint64(nvfs
, "origin",
703 origin
->zfs_dmustats
.dds_guid
));
706 /* iterate over props */
707 VERIFY(0 == nvlist_alloc(&nv
, NV_UNIQUE_NAME
, 0));
708 send_iterate_prop(zhp
, nv
);
709 VERIFY(0 == nvlist_add_nvlist(nvfs
, "props", nv
));
712 /* iterate over snaps, and set sd->parent_fromsnap_guid */
713 sd
->parent_fromsnap_guid
= 0;
714 VERIFY(0 == nvlist_alloc(&sd
->parent_snaps
, NV_UNIQUE_NAME
, 0));
715 VERIFY(0 == nvlist_alloc(&sd
->snapprops
, NV_UNIQUE_NAME
, 0));
716 (void) zfs_iter_snapshots(zhp
, send_iterate_snap
, sd
);
717 VERIFY(0 == nvlist_add_nvlist(nvfs
, "snaps", sd
->parent_snaps
));
718 VERIFY(0 == nvlist_add_nvlist(nvfs
, "snapprops", sd
->snapprops
));
719 nvlist_free(sd
->parent_snaps
);
720 nvlist_free(sd
->snapprops
);
722 /* add this fs to nvlist */
723 (void) snprintf(guidstring
, sizeof (guidstring
),
724 "0x%llx", (longlong_t
)guid
);
725 VERIFY(0 == nvlist_add_nvlist(sd
->fss
, guidstring
, nvfs
));
728 /* iterate over children */
730 rv
= zfs_iter_filesystems(zhp
, send_iterate_fs
, sd
);
732 sd
->parent_fromsnap_guid
= parent_fromsnap_guid_save
;
739 gather_nvlist(libzfs_handle_t
*hdl
, const char *fsname
, const char *fromsnap
,
740 const char *tosnap
, boolean_t recursive
, nvlist_t
**nvlp
, avl_tree_t
**avlp
)
743 send_data_t sd
= { 0 };
746 zhp
= zfs_open(hdl
, fsname
, ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
748 return (EZFS_BADTYPE
);
750 VERIFY(0 == nvlist_alloc(&sd
.fss
, NV_UNIQUE_NAME
, 0));
751 sd
.fromsnap
= fromsnap
;
753 sd
.recursive
= recursive
;
755 if ((error
= send_iterate_fs(zhp
, &sd
)) != 0) {
763 if (avlp
!= NULL
&& (*avlp
= fsavl_create(sd
.fss
)) == NULL
) {
774 * Routines for dealing with the sorted snapshot functionality
776 typedef struct zfs_node
{
777 zfs_handle_t
*zn_handle
;
778 avl_node_t zn_avlnode
;
782 zfs_sort_snaps(zfs_handle_t
*zhp
, void *data
)
784 avl_tree_t
*avl
= data
;
788 search
.zn_handle
= zhp
;
789 node
= avl_find(avl
, &search
, NULL
);
792 * If this snapshot was renamed while we were creating the
793 * AVL tree, it's possible that we already inserted it under
794 * its old name. Remove the old handle before adding the new
797 zfs_close(node
->zn_handle
);
798 avl_remove(avl
, node
);
802 node
= zfs_alloc(zhp
->zfs_hdl
, sizeof (zfs_node_t
));
803 node
->zn_handle
= zhp
;
810 zfs_snapshot_compare(const void *larg
, const void *rarg
)
812 zfs_handle_t
*l
= ((zfs_node_t
*)larg
)->zn_handle
;
813 zfs_handle_t
*r
= ((zfs_node_t
*)rarg
)->zn_handle
;
814 uint64_t lcreate
, rcreate
;
817 * Sort them according to creation time. We use the hidden
818 * CREATETXG property to get an absolute ordering of snapshots.
820 lcreate
= zfs_prop_get_int(l
, ZFS_PROP_CREATETXG
);
821 rcreate
= zfs_prop_get_int(r
, ZFS_PROP_CREATETXG
);
823 if (lcreate
< rcreate
)
825 else if (lcreate
> rcreate
)
832 zfs_iter_snapshots_sorted(zfs_handle_t
*zhp
, zfs_iter_f callback
, void *data
)
839 avl_create(&avl
, zfs_snapshot_compare
,
840 sizeof (zfs_node_t
), offsetof(zfs_node_t
, zn_avlnode
));
842 ret
= zfs_iter_snapshots(zhp
, zfs_sort_snaps
, &avl
);
844 for (node
= avl_first(&avl
); node
!= NULL
; node
= AVL_NEXT(&avl
, node
))
845 ret
|= callback(node
->zn_handle
, data
);
847 while ((node
= avl_destroy_nodes(&avl
, &cookie
)) != NULL
)
856 * Routines specific to "zfs send"
858 typedef struct send_dump_data
{
859 /* these are all just the short snapname (the part after the @) */
860 const char *fromsnap
;
862 char prevsnap
[ZFS_MAXNAMELEN
];
863 uint64_t prevsnap_obj
;
864 boolean_t seenfrom
, seento
, replicate
, doall
, fromorigin
;
870 snapfilter_cb_t
*filter_cb
;
873 char holdtag
[ZFS_MAXNAMELEN
];
878 * Dumps a backup of the given snapshot (incremental from fromsnap if it's not
879 * NULL) to the file descriptor specified by outfd.
882 dump_ioctl(zfs_handle_t
*zhp
, const char *fromsnap
, uint64_t fromsnap_obj
,
883 boolean_t fromorigin
, int outfd
, nvlist_t
*debugnv
)
885 zfs_cmd_t zc
= { 0 };
886 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
889 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
890 assert(fromsnap_obj
== 0 || !fromorigin
);
892 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
893 zc
.zc_cookie
= outfd
;
894 zc
.zc_obj
= fromorigin
;
895 zc
.zc_sendobj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
896 zc
.zc_fromobj
= fromsnap_obj
;
898 VERIFY(0 == nvlist_alloc(&thisdbg
, NV_UNIQUE_NAME
, 0));
899 if (fromsnap
&& fromsnap
[0] != '\0') {
900 VERIFY(0 == nvlist_add_string(thisdbg
,
901 "fromsnap", fromsnap
));
904 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
, ZFS_IOC_SEND
, &zc
) != 0) {
906 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
907 "warning: cannot send '%s'"), zhp
->zfs_name
);
909 VERIFY(0 == nvlist_add_uint64(thisdbg
, "error", errno
));
911 VERIFY(0 == nvlist_add_nvlist(debugnv
,
912 zhp
->zfs_name
, thisdbg
));
914 nvlist_free(thisdbg
);
919 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
920 "not an earlier snapshot from the same fs"));
921 return (zfs_error(hdl
, EZFS_CROSSTARGET
, errbuf
));
924 if (zfs_dataset_exists(hdl
, zc
.zc_name
,
925 ZFS_TYPE_SNAPSHOT
)) {
926 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
927 "incremental source (@%s) does not exist"),
930 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
943 zfs_error_aux(hdl
, strerror(errno
));
944 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
947 return (zfs_standard_error(hdl
, errno
, errbuf
));
952 VERIFY(0 == nvlist_add_nvlist(debugnv
, zhp
->zfs_name
, thisdbg
));
953 nvlist_free(thisdbg
);
959 hold_for_send(zfs_handle_t
*zhp
, send_dump_data_t
*sdd
)
965 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
968 * zfs_send() only opens a cleanup_fd for sends that need it,
969 * e.g. replication and doall.
971 if (sdd
->cleanup_fd
== -1)
974 thissnap
= strchr(zhp
->zfs_name
, '@') + 1;
975 *(thissnap
- 1) = '\0';
976 pzhp
= zfs_open(zhp
->zfs_hdl
, zhp
->zfs_name
, ZFS_TYPE_DATASET
);
977 *(thissnap
- 1) = '@';
980 * It's OK if the parent no longer exists. The send code will
984 error
= zfs_hold(pzhp
, thissnap
, sdd
->holdtag
,
985 B_FALSE
, B_TRUE
, B_TRUE
, sdd
->cleanup_fd
,
986 zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
),
987 zfs_prop_get_int(zhp
, ZFS_PROP_CREATETXG
));
995 dump_snapshot(zfs_handle_t
*zhp
, void *arg
)
997 send_dump_data_t
*sdd
= arg
;
1000 boolean_t isfromsnap
, istosnap
;
1001 boolean_t exclude
= B_FALSE
;
1003 thissnap
= strchr(zhp
->zfs_name
, '@') + 1;
1004 isfromsnap
= (sdd
->fromsnap
!= NULL
&&
1005 strcmp(sdd
->fromsnap
, thissnap
) == 0);
1007 if (!sdd
->seenfrom
&& isfromsnap
) {
1008 err
= hold_for_send(zhp
, sdd
);
1010 sdd
->seenfrom
= B_TRUE
;
1011 (void) strcpy(sdd
->prevsnap
, thissnap
);
1012 sdd
->prevsnap_obj
= zfs_prop_get_int(zhp
,
1014 } else if (err
== ENOENT
) {
1021 if (sdd
->seento
|| !sdd
->seenfrom
) {
1026 istosnap
= (strcmp(sdd
->tosnap
, thissnap
) == 0);
1028 sdd
->seento
= B_TRUE
;
1030 if (!sdd
->doall
&& !isfromsnap
&& !istosnap
) {
1031 if (sdd
->replicate
) {
1033 nvlist_t
*snapprops
;
1035 * Filter out all intermediate snapshots except origin
1036 * snapshots needed to replicate clones.
1038 nvlist_t
*nvfs
= fsavl_find(sdd
->fsavl
,
1039 zhp
->zfs_dmustats
.dds_guid
, &snapname
);
1041 VERIFY(0 == nvlist_lookup_nvlist(nvfs
,
1042 "snapprops", &snapprops
));
1043 VERIFY(0 == nvlist_lookup_nvlist(snapprops
,
1044 thissnap
, &snapprops
));
1045 exclude
= !nvlist_exists(snapprops
, "is_clone_origin");
1052 * If a filter function exists, call it to determine whether
1053 * this snapshot will be sent.
1055 if (exclude
|| (sdd
->filter_cb
!= NULL
&&
1056 sdd
->filter_cb(zhp
, sdd
->filter_cb_arg
) == B_FALSE
)) {
1058 * This snapshot is filtered out. Don't send it, and don't
1059 * set prevsnap_obj, so it will be as if this snapshot didn't
1060 * exist, and the next accepted snapshot will be sent as
1061 * an incremental from the last accepted one, or as the
1062 * first (and full) snapshot in the case of a replication,
1063 * non-incremental send.
1069 err
= hold_for_send(zhp
, sdd
);
1079 (void) fprintf(stderr
, "sending from @%s to %s\n",
1080 sdd
->prevsnap
, zhp
->zfs_name
);
1083 err
= dump_ioctl(zhp
, sdd
->prevsnap
, sdd
->prevsnap_obj
,
1084 sdd
->prevsnap
[0] == '\0' && (sdd
->fromorigin
|| sdd
->replicate
),
1085 sdd
->outfd
, sdd
->debugnv
);
1087 (void) strcpy(sdd
->prevsnap
, thissnap
);
1088 sdd
->prevsnap_obj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
1094 dump_filesystem(zfs_handle_t
*zhp
, void *arg
)
1097 send_dump_data_t
*sdd
= arg
;
1098 boolean_t missingfrom
= B_FALSE
;
1099 zfs_cmd_t zc
= { 0 };
1101 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
), "%s@%s",
1102 zhp
->zfs_name
, sdd
->tosnap
);
1103 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
, ZFS_IOC_OBJSET_STATS
, &zc
) != 0) {
1104 (void) fprintf(stderr
, "WARNING: "
1105 "could not send %s@%s: does not exist\n",
1106 zhp
->zfs_name
, sdd
->tosnap
);
1111 if (sdd
->replicate
&& sdd
->fromsnap
) {
1113 * If this fs does not have fromsnap, and we're doing
1114 * recursive, we need to send a full stream from the
1115 * beginning (or an incremental from the origin if this
1116 * is a clone). If we're doing non-recursive, then let
1117 * them get the error.
1119 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
), "%s@%s",
1120 zhp
->zfs_name
, sdd
->fromsnap
);
1121 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
,
1122 ZFS_IOC_OBJSET_STATS
, &zc
) != 0) {
1123 missingfrom
= B_TRUE
;
1127 sdd
->seenfrom
= sdd
->seento
= sdd
->prevsnap
[0] = 0;
1128 sdd
->prevsnap_obj
= 0;
1129 if (sdd
->fromsnap
== NULL
|| missingfrom
)
1130 sdd
->seenfrom
= B_TRUE
;
1132 rv
= zfs_iter_snapshots_sorted(zhp
, dump_snapshot
, arg
);
1133 if (!sdd
->seenfrom
) {
1134 (void) fprintf(stderr
,
1135 "WARNING: could not send %s@%s:\n"
1136 "incremental source (%s@%s) does not exist\n",
1137 zhp
->zfs_name
, sdd
->tosnap
,
1138 zhp
->zfs_name
, sdd
->fromsnap
);
1140 } else if (!sdd
->seento
) {
1141 if (sdd
->fromsnap
) {
1142 (void) fprintf(stderr
,
1143 "WARNING: could not send %s@%s:\n"
1144 "incremental source (%s@%s) "
1145 "is not earlier than it\n",
1146 zhp
->zfs_name
, sdd
->tosnap
,
1147 zhp
->zfs_name
, sdd
->fromsnap
);
1149 (void) fprintf(stderr
, "WARNING: "
1150 "could not send %s@%s: does not exist\n",
1151 zhp
->zfs_name
, sdd
->tosnap
);
1160 dump_filesystems(zfs_handle_t
*rzhp
, void *arg
)
1162 send_dump_data_t
*sdd
= arg
;
1164 boolean_t needagain
, progress
;
1166 if (!sdd
->replicate
)
1167 return (dump_filesystem(rzhp
, sdd
));
1169 /* Mark the clone origin snapshots. */
1170 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1171 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1173 uint64_t origin_guid
= 0;
1175 VERIFY(0 == nvpair_value_nvlist(fspair
, &nvfs
));
1176 (void) nvlist_lookup_uint64(nvfs
, "origin", &origin_guid
);
1177 if (origin_guid
!= 0) {
1179 nvlist_t
*origin_nv
= fsavl_find(sdd
->fsavl
,
1180 origin_guid
, &snapname
);
1181 if (origin_nv
!= NULL
) {
1182 nvlist_t
*snapprops
;
1183 VERIFY(0 == nvlist_lookup_nvlist(origin_nv
,
1184 "snapprops", &snapprops
));
1185 VERIFY(0 == nvlist_lookup_nvlist(snapprops
,
1186 snapname
, &snapprops
));
1187 VERIFY(0 == nvlist_add_boolean(
1188 snapprops
, "is_clone_origin"));
1193 needagain
= progress
= B_FALSE
;
1194 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1195 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1200 uint64_t origin_guid
= 0;
1202 VERIFY(nvpair_value_nvlist(fspair
, &fslist
) == 0);
1203 if (nvlist_lookup_boolean(fslist
, "sent") == 0)
1206 VERIFY(nvlist_lookup_string(fslist
, "name", &fsname
) == 0);
1207 (void) nvlist_lookup_uint64(fslist
, "origin", &origin_guid
);
1209 if (origin_guid
!= 0) {
1210 nvlist_t
*origin_nv
= fsavl_find(sdd
->fsavl
,
1212 if (origin_nv
!= NULL
&&
1213 nvlist_lookup_boolean(origin_nv
,
1214 "sent") == ENOENT
) {
1216 * origin has not been sent yet;
1224 zhp
= zfs_open(rzhp
->zfs_hdl
, fsname
, ZFS_TYPE_DATASET
);
1227 err
= dump_filesystem(zhp
, sdd
);
1228 VERIFY(nvlist_add_boolean(fslist
, "sent") == 0);
1242 * Generate a send stream for the dataset identified by the argument zhp.
1244 * The content of the send stream is the snapshot identified by
1245 * 'tosnap'. Incremental streams are requested in two ways:
1246 * - from the snapshot identified by "fromsnap" (if non-null) or
1247 * - from the origin of the dataset identified by zhp, which must
1248 * be a clone. In this case, "fromsnap" is null and "fromorigin"
1251 * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and
1252 * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM)
1253 * if "replicate" is set. If "doall" is set, dump all the intermediate
1254 * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall"
1255 * case too. If "props" is set, send properties.
1258 zfs_send(zfs_handle_t
*zhp
, const char *fromsnap
, const char *tosnap
,
1259 sendflags_t flags
, int outfd
, snapfilter_cb_t filter_func
,
1260 void *cb_arg
, nvlist_t
**debugnvp
)
1263 send_dump_data_t sdd
= { 0 };
1265 nvlist_t
*fss
= NULL
;
1266 avl_tree_t
*fsavl
= NULL
;
1267 static uint64_t holdseq
;
1269 boolean_t holdsnaps
= B_FALSE
;
1272 dedup_arg_t dda
= { 0 };
1273 int featureflags
= 0;
1275 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
1276 "cannot send '%s'"), zhp
->zfs_name
);
1278 if (fromsnap
&& fromsnap
[0] == '\0') {
1279 zfs_error_aux(zhp
->zfs_hdl
, dgettext(TEXT_DOMAIN
,
1280 "zero-length incremental source"));
1281 return (zfs_error(zhp
->zfs_hdl
, EZFS_NOENT
, errbuf
));
1284 if (zhp
->zfs_type
== ZFS_TYPE_FILESYSTEM
) {
1286 version
= zfs_prop_get_int(zhp
, ZFS_PROP_VERSION
);
1287 if (version
>= ZPL_VERSION_SA
) {
1288 featureflags
|= DMU_BACKUP_FEATURE_SA_SPILL
;
1292 if (zfs_spa_version(zhp
, &spa_version
) == 0 &&
1293 spa_version
>= SPA_VERSION_USERREFS
&&
1294 (flags
.doall
|| flags
.replicate
))
1298 featureflags
|= (DMU_BACKUP_FEATURE_DEDUP
|
1299 DMU_BACKUP_FEATURE_DEDUPPROPS
);
1300 if (err
= pipe(pipefd
)) {
1301 zfs_error_aux(zhp
->zfs_hdl
, strerror(errno
));
1302 return (zfs_error(zhp
->zfs_hdl
, EZFS_PIPEFAILED
,
1305 dda
.outputfd
= outfd
;
1306 dda
.inputfd
= pipefd
[1];
1307 dda
.dedup_hdl
= zhp
->zfs_hdl
;
1308 if (err
= pthread_create(&tid
, NULL
, cksummer
, &dda
)) {
1309 (void) close(pipefd
[0]);
1310 (void) close(pipefd
[1]);
1311 zfs_error_aux(zhp
->zfs_hdl
, strerror(errno
));
1312 return (zfs_error(zhp
->zfs_hdl
,
1313 EZFS_THREADCREATEFAILED
, errbuf
));
1317 if (flags
.replicate
|| flags
.doall
|| flags
.props
) {
1318 dmu_replay_record_t drr
= { 0 };
1319 char *packbuf
= NULL
;
1321 zio_cksum_t zc
= { 0 };
1323 if (flags
.replicate
|| flags
.props
) {
1326 VERIFY(0 == nvlist_alloc(&hdrnv
, NV_UNIQUE_NAME
, 0));
1328 VERIFY(0 == nvlist_add_string(hdrnv
,
1329 "fromsnap", fromsnap
));
1331 VERIFY(0 == nvlist_add_string(hdrnv
, "tosnap", tosnap
));
1332 if (!flags
.replicate
) {
1333 VERIFY(0 == nvlist_add_boolean(hdrnv
,
1337 err
= gather_nvlist(zhp
->zfs_hdl
, zhp
->zfs_name
,
1338 fromsnap
, tosnap
, flags
.replicate
, &fss
, &fsavl
);
1341 VERIFY(0 == nvlist_add_nvlist(hdrnv
, "fss", fss
));
1342 err
= nvlist_pack(hdrnv
, &packbuf
, &buflen
,
1349 fsavl_destroy(fsavl
);
1355 /* write first begin record */
1356 drr
.drr_type
= DRR_BEGIN
;
1357 drr
.drr_u
.drr_begin
.drr_magic
= DMU_BACKUP_MAGIC
;
1358 DMU_SET_STREAM_HDRTYPE(drr
.drr_u
.drr_begin
.drr_versioninfo
,
1359 DMU_COMPOUNDSTREAM
);
1360 DMU_SET_FEATUREFLAGS(drr
.drr_u
.drr_begin
.drr_versioninfo
,
1362 (void) snprintf(drr
.drr_u
.drr_begin
.drr_toname
,
1363 sizeof (drr
.drr_u
.drr_begin
.drr_toname
),
1364 "%s@%s", zhp
->zfs_name
, tosnap
);
1365 drr
.drr_payloadlen
= buflen
;
1366 err
= cksum_and_write(&drr
, sizeof (drr
), &zc
, outfd
);
1368 /* write header nvlist */
1369 if (err
!= -1 && packbuf
!= NULL
) {
1370 err
= cksum_and_write(packbuf
, buflen
, &zc
, outfd
);
1374 fsavl_destroy(fsavl
);
1380 /* write end record */
1382 bzero(&drr
, sizeof (drr
));
1383 drr
.drr_type
= DRR_END
;
1384 drr
.drr_u
.drr_end
.drr_checksum
= zc
;
1385 err
= write(outfd
, &drr
, sizeof (drr
));
1387 fsavl_destroy(fsavl
);
1395 /* dump each stream */
1396 sdd
.fromsnap
= fromsnap
;
1397 sdd
.tosnap
= tosnap
;
1399 sdd
.outfd
= pipefd
[0];
1402 sdd
.replicate
= flags
.replicate
;
1403 sdd
.doall
= flags
.doall
;
1404 sdd
.fromorigin
= flags
.fromorigin
;
1407 sdd
.verbose
= flags
.verbose
;
1408 sdd
.filter_cb
= filter_func
;
1409 sdd
.filter_cb_arg
= cb_arg
;
1411 sdd
.debugnv
= *debugnvp
;
1414 (void) snprintf(sdd
.holdtag
, sizeof (sdd
.holdtag
),
1415 ".send-%d-%llu", getpid(), (u_longlong_t
)holdseq
);
1416 sdd
.cleanup_fd
= open(ZFS_DEV
, O_RDWR
|O_EXCL
);
1417 if (sdd
.cleanup_fd
< 0) {
1422 sdd
.cleanup_fd
= -1;
1424 err
= dump_filesystems(zhp
, &sdd
);
1425 fsavl_destroy(fsavl
);
1429 (void) close(pipefd
[0]);
1430 (void) pthread_join(tid
, NULL
);
1433 if (sdd
.cleanup_fd
!= -1) {
1434 VERIFY(0 == close(sdd
.cleanup_fd
));
1435 sdd
.cleanup_fd
= -1;
1438 if (flags
.replicate
|| flags
.doall
|| flags
.props
) {
1440 * write final end record. NB: want to do this even if
1441 * there was some error, because it might not be totally
1444 dmu_replay_record_t drr
= { 0 };
1445 drr
.drr_type
= DRR_END
;
1446 if (write(outfd
, &drr
, sizeof (drr
)) == -1) {
1447 return (zfs_standard_error(zhp
->zfs_hdl
,
1452 return (err
|| sdd
.err
);
1455 err
= zfs_standard_error(zhp
->zfs_hdl
, err
, errbuf
);
1457 if (sdd
.cleanup_fd
!= -1)
1458 VERIFY(0 == close(sdd
.cleanup_fd
));
1460 (void) pthread_cancel(tid
);
1461 (void) pthread_join(tid
, NULL
);
1462 (void) close(pipefd
[0]);
1468 * Routines specific to "zfs recv"
1472 recv_read(libzfs_handle_t
*hdl
, int fd
, void *buf
, int ilen
,
1473 boolean_t byteswap
, zio_cksum_t
*zc
)
1480 rv
= read(fd
, cp
, len
);
1485 if (rv
< 0 || len
!= 0) {
1486 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1487 "failed to read from stream"));
1488 return (zfs_error(hdl
, EZFS_BADSTREAM
, dgettext(TEXT_DOMAIN
,
1489 "cannot receive")));
1494 fletcher_4_incremental_byteswap(buf
, ilen
, zc
);
1496 fletcher_4_incremental_native(buf
, ilen
, zc
);
1502 recv_read_nvlist(libzfs_handle_t
*hdl
, int fd
, int len
, nvlist_t
**nvp
,
1503 boolean_t byteswap
, zio_cksum_t
*zc
)
1508 buf
= zfs_alloc(hdl
, len
);
1512 err
= recv_read(hdl
, fd
, buf
, len
, byteswap
, zc
);
1518 err
= nvlist_unpack(buf
, len
, nvp
, 0);
1521 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
1522 "stream (malformed nvlist)"));
1529 recv_rename(libzfs_handle_t
*hdl
, const char *name
, const char *tryname
,
1530 int baselen
, char *newname
, recvflags_t flags
)
1533 zfs_cmd_t zc
= { 0 };
1535 prop_changelist_t
*clp
;
1538 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
1541 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0,
1542 flags
.force
? MS_FORCE
: 0);
1546 err
= changelist_prefix(clp
);
1550 zc
.zc_objset_type
= DMU_OST_ZFS
;
1551 (void) strlcpy(zc
.zc_name
, name
, sizeof (zc
.zc_name
));
1554 (void) strcpy(newname
, tryname
);
1556 (void) strlcpy(zc
.zc_value
, tryname
, sizeof (zc
.zc_value
));
1558 if (flags
.verbose
) {
1559 (void) printf("attempting rename %s to %s\n",
1560 zc
.zc_name
, zc
.zc_value
);
1562 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_RENAME
, &zc
);
1564 changelist_rename(clp
, name
, tryname
);
1569 if (err
!= 0 && strncmp(name
+baselen
, "recv-", 5) != 0) {
1572 (void) strncpy(newname
, name
, baselen
);
1573 (void) snprintf(newname
+baselen
, ZFS_MAXNAMELEN
-baselen
,
1574 "recv-%u-%u", getpid(), seq
);
1575 (void) strlcpy(zc
.zc_value
, newname
, sizeof (zc
.zc_value
));
1577 if (flags
.verbose
) {
1578 (void) printf("failed - trying rename %s to %s\n",
1579 zc
.zc_name
, zc
.zc_value
);
1581 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_RENAME
, &zc
);
1583 changelist_rename(clp
, name
, newname
);
1584 if (err
&& flags
.verbose
) {
1585 (void) printf("failed (%u) - "
1586 "will try again on next pass\n", errno
);
1589 } else if (flags
.verbose
) {
1591 (void) printf("success\n");
1593 (void) printf("failed (%u)\n", errno
);
1596 (void) changelist_postfix(clp
);
1597 changelist_free(clp
);
1603 recv_destroy(libzfs_handle_t
*hdl
, const char *name
, int baselen
,
1604 char *newname
, recvflags_t flags
)
1606 zfs_cmd_t zc
= { 0 };
1608 prop_changelist_t
*clp
;
1610 boolean_t defer
= B_FALSE
;
1613 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
1616 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0,
1617 flags
.force
? MS_FORCE
: 0);
1618 if (zfs_get_type(zhp
) == ZFS_TYPE_SNAPSHOT
&&
1619 zfs_spa_version(zhp
, &spa_version
) == 0 &&
1620 spa_version
>= SPA_VERSION_USERREFS
)
1625 err
= changelist_prefix(clp
);
1629 zc
.zc_objset_type
= DMU_OST_ZFS
;
1630 zc
.zc_defer_destroy
= defer
;
1631 (void) strlcpy(zc
.zc_name
, name
, sizeof (zc
.zc_name
));
1634 (void) printf("attempting destroy %s\n", zc
.zc_name
);
1635 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_DESTROY
, &zc
);
1638 (void) printf("success\n");
1639 changelist_remove(clp
, zc
.zc_name
);
1642 (void) changelist_postfix(clp
);
1643 changelist_free(clp
);
1646 * Deferred destroy might destroy the snapshot or only mark it to be
1647 * destroyed later, and it returns success in either case.
1649 if (err
!= 0 || (defer
&& zfs_dataset_exists(hdl
, name
,
1650 ZFS_TYPE_SNAPSHOT
))) {
1651 err
= recv_rename(hdl
, name
, NULL
, baselen
, newname
, flags
);
1657 typedef struct guid_to_name_data
{
1660 } guid_to_name_data_t
;
1663 guid_to_name_cb(zfs_handle_t
*zhp
, void *arg
)
1665 guid_to_name_data_t
*gtnd
= arg
;
1668 if (zhp
->zfs_dmustats
.dds_guid
== gtnd
->guid
) {
1669 (void) strcpy(gtnd
->name
, zhp
->zfs_name
);
1673 err
= zfs_iter_children(zhp
, guid_to_name_cb
, gtnd
);
1679 guid_to_name(libzfs_handle_t
*hdl
, const char *parent
, uint64_t guid
,
1682 /* exhaustive search all local snapshots */
1683 guid_to_name_data_t gtnd
;
1691 if (strchr(parent
, '@') == NULL
) {
1692 zhp
= make_dataset_handle(hdl
, parent
);
1694 err
= zfs_iter_children(zhp
, guid_to_name_cb
, >nd
);
1701 cp
= strchr(parent
, '/');
1704 zhp
= make_dataset_handle(hdl
, parent
);
1709 err
= zfs_iter_children(zhp
, guid_to_name_cb
, >nd
);
1713 return (err
== EEXIST
? 0 : ENOENT
);
1718 * Return true if dataset guid1 is created before guid2.
1721 created_before(libzfs_handle_t
*hdl
, avl_tree_t
*avl
,
1722 uint64_t guid1
, uint64_t guid2
)
1725 char *fsname
, *snapname
;
1726 char buf
[ZFS_MAXNAMELEN
];
1728 zfs_node_t zn1
, zn2
;
1735 nvfs
= fsavl_find(avl
, guid1
, &snapname
);
1736 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
1737 (void) snprintf(buf
, sizeof (buf
), "%s@%s", fsname
, snapname
);
1738 zn1
.zn_handle
= zfs_open(hdl
, buf
, ZFS_TYPE_SNAPSHOT
);
1739 if (zn1
.zn_handle
== NULL
)
1742 nvfs
= fsavl_find(avl
, guid2
, &snapname
);
1743 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
1744 (void) snprintf(buf
, sizeof (buf
), "%s@%s", fsname
, snapname
);
1745 zn2
.zn_handle
= zfs_open(hdl
, buf
, ZFS_TYPE_SNAPSHOT
);
1746 if (zn2
.zn_handle
== NULL
) {
1747 zfs_close(zn2
.zn_handle
);
1751 rv
= (zfs_snapshot_compare(&zn1
, &zn2
) == -1);
1753 zfs_close(zn1
.zn_handle
);
1754 zfs_close(zn2
.zn_handle
);
1760 recv_incremental_replication(libzfs_handle_t
*hdl
, const char *tofs
,
1761 recvflags_t flags
, nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
,
1765 avl_tree_t
*local_avl
;
1766 nvpair_t
*fselem
, *nextfselem
;
1768 char newname
[ZFS_MAXNAMELEN
];
1770 boolean_t needagain
, progress
, recursive
;
1773 VERIFY(0 == nvlist_lookup_string(stream_nv
, "fromsnap", &fromsnap
));
1775 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
1782 needagain
= progress
= B_FALSE
;
1784 if ((error
= gather_nvlist(hdl
, tofs
, fromsnap
, NULL
,
1785 recursive
, &local_nv
, &local_avl
)) != 0)
1789 * Process deletes and renames
1791 for (fselem
= nvlist_next_nvpair(local_nv
, NULL
);
1792 fselem
; fselem
= nextfselem
) {
1793 nvlist_t
*nvfs
, *snaps
;
1794 nvlist_t
*stream_nvfs
= NULL
;
1795 nvpair_t
*snapelem
, *nextsnapelem
;
1796 uint64_t fromguid
= 0;
1797 uint64_t originguid
= 0;
1798 uint64_t stream_originguid
= 0;
1799 uint64_t parent_fromsnap_guid
, stream_parent_fromsnap_guid
;
1800 char *fsname
, *stream_fsname
;
1802 nextfselem
= nvlist_next_nvpair(local_nv
, fselem
);
1804 VERIFY(0 == nvpair_value_nvlist(fselem
, &nvfs
));
1805 VERIFY(0 == nvlist_lookup_nvlist(nvfs
, "snaps", &snaps
));
1806 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
1807 VERIFY(0 == nvlist_lookup_uint64(nvfs
, "parentfromsnap",
1808 &parent_fromsnap_guid
));
1809 (void) nvlist_lookup_uint64(nvfs
, "origin", &originguid
);
1812 * First find the stream's fs, so we can check for
1813 * a different origin (due to "zfs promote")
1815 for (snapelem
= nvlist_next_nvpair(snaps
, NULL
);
1816 snapelem
; snapelem
= nvlist_next_nvpair(snaps
, snapelem
)) {
1819 VERIFY(0 == nvpair_value_uint64(snapelem
, &thisguid
));
1820 stream_nvfs
= fsavl_find(stream_avl
, thisguid
, NULL
);
1822 if (stream_nvfs
!= NULL
)
1826 /* check for promote */
1827 (void) nvlist_lookup_uint64(stream_nvfs
, "origin",
1828 &stream_originguid
);
1829 if (stream_nvfs
&& originguid
!= stream_originguid
) {
1830 switch (created_before(hdl
, local_avl
,
1831 stream_originguid
, originguid
)) {
1834 zfs_cmd_t zc
= { 0 };
1835 nvlist_t
*origin_nvfs
;
1836 char *origin_fsname
;
1839 (void) printf("promoting %s\n", fsname
);
1841 origin_nvfs
= fsavl_find(local_avl
, originguid
,
1843 VERIFY(0 == nvlist_lookup_string(origin_nvfs
,
1844 "name", &origin_fsname
));
1845 (void) strlcpy(zc
.zc_value
, origin_fsname
,
1846 sizeof (zc
.zc_value
));
1847 (void) strlcpy(zc
.zc_name
, fsname
,
1848 sizeof (zc
.zc_name
));
1849 error
= zfs_ioctl(hdl
, ZFS_IOC_PROMOTE
, &zc
);
1857 fsavl_destroy(local_avl
);
1858 nvlist_free(local_nv
);
1862 * We had/have the wrong origin, therefore our
1863 * list of snapshots is wrong. Need to handle
1864 * them on the next pass.
1870 for (snapelem
= nvlist_next_nvpair(snaps
, NULL
);
1871 snapelem
; snapelem
= nextsnapelem
) {
1873 char *stream_snapname
;
1874 nvlist_t
*found
, *props
;
1876 nextsnapelem
= nvlist_next_nvpair(snaps
, snapelem
);
1878 VERIFY(0 == nvpair_value_uint64(snapelem
, &thisguid
));
1879 found
= fsavl_find(stream_avl
, thisguid
,
1882 /* check for delete */
1883 if (found
== NULL
) {
1884 char name
[ZFS_MAXNAMELEN
];
1889 (void) snprintf(name
, sizeof (name
), "%s@%s",
1890 fsname
, nvpair_name(snapelem
));
1892 error
= recv_destroy(hdl
, name
,
1893 strlen(fsname
)+1, newname
, flags
);
1901 stream_nvfs
= found
;
1903 if (0 == nvlist_lookup_nvlist(stream_nvfs
, "snapprops",
1904 &props
) && 0 == nvlist_lookup_nvlist(props
,
1905 stream_snapname
, &props
)) {
1906 zfs_cmd_t zc
= { 0 };
1908 zc
.zc_cookie
= B_TRUE
; /* received */
1909 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
),
1910 "%s@%s", fsname
, nvpair_name(snapelem
));
1911 if (zcmd_write_src_nvlist(hdl
, &zc
,
1913 (void) zfs_ioctl(hdl
,
1914 ZFS_IOC_SET_PROP
, &zc
);
1915 zcmd_free_nvlists(&zc
);
1919 /* check for different snapname */
1920 if (strcmp(nvpair_name(snapelem
),
1921 stream_snapname
) != 0) {
1922 char name
[ZFS_MAXNAMELEN
];
1923 char tryname
[ZFS_MAXNAMELEN
];
1925 (void) snprintf(name
, sizeof (name
), "%s@%s",
1926 fsname
, nvpair_name(snapelem
));
1927 (void) snprintf(tryname
, sizeof (name
), "%s@%s",
1928 fsname
, stream_snapname
);
1930 error
= recv_rename(hdl
, name
, tryname
,
1931 strlen(fsname
)+1, newname
, flags
);
1938 if (strcmp(stream_snapname
, fromsnap
) == 0)
1939 fromguid
= thisguid
;
1942 /* check for delete */
1943 if (stream_nvfs
== NULL
) {
1947 error
= recv_destroy(hdl
, fsname
, strlen(tofs
)+1,
1956 if (fromguid
== 0) {
1957 if (flags
.verbose
) {
1958 (void) printf("local fs %s does not have "
1959 "fromsnap (%s in stream); must have "
1960 "been deleted locally; ignoring\n",
1966 VERIFY(0 == nvlist_lookup_string(stream_nvfs
,
1967 "name", &stream_fsname
));
1968 VERIFY(0 == nvlist_lookup_uint64(stream_nvfs
,
1969 "parentfromsnap", &stream_parent_fromsnap_guid
));
1971 s1
= strrchr(fsname
, '/');
1972 s2
= strrchr(stream_fsname
, '/');
1975 * Check for rename. If the exact receive path is specified, it
1976 * does not count as a rename, but we still need to check the
1977 * datasets beneath it.
1979 if ((stream_parent_fromsnap_guid
!= 0 &&
1980 parent_fromsnap_guid
!= 0 &&
1981 stream_parent_fromsnap_guid
!= parent_fromsnap_guid
) ||
1982 ((flags
.isprefix
|| strcmp(tofs
, fsname
) != 0) &&
1983 (s1
!= NULL
) && (s2
!= NULL
) && strcmp(s1
, s2
) != 0)) {
1985 char tryname
[ZFS_MAXNAMELEN
];
1987 parent
= fsavl_find(local_avl
,
1988 stream_parent_fromsnap_guid
, NULL
);
1990 * NB: parent might not be found if we used the
1991 * tosnap for stream_parent_fromsnap_guid,
1992 * because the parent is a newly-created fs;
1993 * we'll be able to rename it after we recv the
1996 if (parent
!= NULL
) {
1999 VERIFY(0 == nvlist_lookup_string(parent
, "name",
2001 (void) snprintf(tryname
, sizeof (tryname
),
2002 "%s%s", pname
, strrchr(stream_fsname
, '/'));
2005 if (flags
.verbose
) {
2006 (void) printf("local fs %s new parent "
2007 "not found\n", fsname
);
2013 error
= recv_rename(hdl
, fsname
, tryname
,
2014 strlen(tofs
)+1, newname
, flags
);
2016 if (renamed
!= NULL
&& newname
[0] != '\0') {
2017 VERIFY(0 == nvlist_add_boolean(renamed
,
2028 fsavl_destroy(local_avl
);
2029 nvlist_free(local_nv
);
2031 if (needagain
&& progress
) {
2032 /* do another pass to fix up temporary names */
2034 (void) printf("another pass:\n");
2042 zfs_receive_package(libzfs_handle_t
*hdl
, int fd
, const char *destname
,
2043 recvflags_t flags
, dmu_replay_record_t
*drr
, zio_cksum_t
*zc
,
2044 char **top_zfs
, int cleanup_fd
, uint64_t *action_handlep
)
2046 nvlist_t
*stream_nv
= NULL
;
2047 avl_tree_t
*stream_avl
= NULL
;
2048 char *fromsnap
= NULL
;
2050 char tofs
[ZFS_MAXNAMELEN
];
2051 char sendfs
[ZFS_MAXNAMELEN
];
2053 dmu_replay_record_t drre
;
2055 boolean_t anyerr
= B_FALSE
;
2056 boolean_t softerr
= B_FALSE
;
2057 boolean_t recursive
;
2059 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2062 assert(drr
->drr_type
== DRR_BEGIN
);
2063 assert(drr
->drr_u
.drr_begin
.drr_magic
== DMU_BACKUP_MAGIC
);
2064 assert(DMU_GET_STREAM_HDRTYPE(drr
->drr_u
.drr_begin
.drr_versioninfo
) ==
2065 DMU_COMPOUNDSTREAM
);
2068 * Read in the nvlist from the stream.
2070 if (drr
->drr_payloadlen
!= 0) {
2071 error
= recv_read_nvlist(hdl
, fd
, drr
->drr_payloadlen
,
2072 &stream_nv
, flags
.byteswap
, zc
);
2074 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2079 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2082 if (recursive
&& strchr(destname
, '@')) {
2083 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2084 "cannot specify snapshot name for multi-snapshot stream"));
2085 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2090 * Read in the end record and verify checksum.
2092 if (0 != (error
= recv_read(hdl
, fd
, &drre
, sizeof (drre
),
2093 flags
.byteswap
, NULL
)))
2095 if (flags
.byteswap
) {
2096 drre
.drr_type
= BSWAP_32(drre
.drr_type
);
2097 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[0] =
2098 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[0]);
2099 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[1] =
2100 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[1]);
2101 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[2] =
2102 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[2]);
2103 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[3] =
2104 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[3]);
2106 if (drre
.drr_type
!= DRR_END
) {
2107 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2110 if (!ZIO_CHECKSUM_EQUAL(drre
.drr_u
.drr_end
.drr_checksum
, *zc
)) {
2111 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2112 "incorrect header checksum"));
2113 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2117 (void) nvlist_lookup_string(stream_nv
, "fromsnap", &fromsnap
);
2119 if (drr
->drr_payloadlen
!= 0) {
2120 nvlist_t
*stream_fss
;
2122 VERIFY(0 == nvlist_lookup_nvlist(stream_nv
, "fss",
2124 if ((stream_avl
= fsavl_create(stream_fss
)) == NULL
) {
2125 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2126 "couldn't allocate avl tree"));
2127 error
= zfs_error(hdl
, EZFS_NOMEM
, errbuf
);
2131 if (fromsnap
!= NULL
) {
2132 nvlist_t
*renamed
= NULL
;
2133 nvpair_t
*pair
= NULL
;
2135 (void) strlcpy(tofs
, destname
, ZFS_MAXNAMELEN
);
2136 if (flags
.isprefix
) {
2137 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
2141 cp
= strrchr(drrb
->drr_toname
, '/');
2143 (void) strlcat(tofs
, "/",
2147 i
= (cp
- drrb
->drr_toname
);
2150 i
= strcspn(drrb
->drr_toname
, "/@");
2152 /* zfs_receive_one() will create_parents() */
2153 (void) strlcat(tofs
, &drrb
->drr_toname
[i
],
2155 *strchr(tofs
, '@') = '\0';
2158 if (recursive
&& !flags
.dryrun
&& !flags
.nomount
) {
2159 VERIFY(0 == nvlist_alloc(&renamed
,
2160 NV_UNIQUE_NAME
, 0));
2163 softerr
= recv_incremental_replication(hdl
, tofs
, flags
,
2164 stream_nv
, stream_avl
, renamed
);
2166 /* Unmount renamed filesystems before receiving. */
2167 while ((pair
= nvlist_next_nvpair(renamed
,
2170 prop_changelist_t
*clp
= NULL
;
2172 zhp
= zfs_open(hdl
, nvpair_name(pair
),
2173 ZFS_TYPE_FILESYSTEM
);
2175 clp
= changelist_gather(zhp
,
2176 ZFS_PROP_MOUNTPOINT
, 0, 0);
2180 changelist_prefix(clp
);
2181 changelist_free(clp
);
2186 nvlist_free(renamed
);
2191 * Get the fs specified by the first path in the stream (the top level
2192 * specified by 'zfs send') and pass it to each invocation of
2193 * zfs_receive_one().
2195 (void) strlcpy(sendfs
, drr
->drr_u
.drr_begin
.drr_toname
,
2197 if ((cp
= strchr(sendfs
, '@')) != NULL
)
2200 /* Finally, receive each contained stream */
2203 * we should figure out if it has a recoverable
2204 * error, in which case do a recv_skip() and drive on.
2205 * Note, if we fail due to already having this guid,
2206 * zfs_receive_one() will take care of it (ie,
2207 * recv_skip() and return 0).
2209 error
= zfs_receive_impl(hdl
, destname
, flags
, fd
,
2210 sendfs
, stream_nv
, stream_avl
, top_zfs
, cleanup_fd
,
2212 if (error
== ENODATA
) {
2217 } while (error
== 0);
2219 if (drr
->drr_payloadlen
!= 0 && fromsnap
!= NULL
) {
2221 * Now that we have the fs's they sent us, try the
2224 softerr
= recv_incremental_replication(hdl
, tofs
, flags
,
2225 stream_nv
, stream_avl
, NULL
);
2229 fsavl_destroy(stream_avl
);
2231 nvlist_free(stream_nv
);
2240 trunc_prop_errs(int truncated
)
2242 ASSERT(truncated
!= 0);
2245 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
2246 "1 more property could not be set\n"));
2248 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
2249 "%d more properties could not be set\n"), truncated
);
2253 recv_skip(libzfs_handle_t
*hdl
, int fd
, boolean_t byteswap
)
2255 dmu_replay_record_t
*drr
;
2256 void *buf
= malloc(1<<20);
2259 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2260 "cannot receive:"));
2262 /* XXX would be great to use lseek if possible... */
2265 while (recv_read(hdl
, fd
, drr
, sizeof (dmu_replay_record_t
),
2266 byteswap
, NULL
) == 0) {
2268 drr
->drr_type
= BSWAP_32(drr
->drr_type
);
2270 switch (drr
->drr_type
) {
2272 /* NB: not to be used on v2 stream packages */
2273 if (drr
->drr_payloadlen
!= 0) {
2274 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2275 "invalid substream header"));
2276 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2286 drr
->drr_u
.drr_object
.drr_bonuslen
=
2287 BSWAP_32(drr
->drr_u
.drr_object
.
2290 (void) recv_read(hdl
, fd
, buf
,
2291 P2ROUNDUP(drr
->drr_u
.drr_object
.drr_bonuslen
, 8),
2297 drr
->drr_u
.drr_write
.drr_length
=
2298 BSWAP_64(drr
->drr_u
.drr_write
.drr_length
);
2300 (void) recv_read(hdl
, fd
, buf
,
2301 drr
->drr_u
.drr_write
.drr_length
, B_FALSE
, NULL
);
2305 drr
->drr_u
.drr_write
.drr_length
=
2306 BSWAP_64(drr
->drr_u
.drr_spill
.drr_length
);
2308 (void) recv_read(hdl
, fd
, buf
,
2309 drr
->drr_u
.drr_spill
.drr_length
, B_FALSE
, NULL
);
2311 case DRR_WRITE_BYREF
:
2312 case DRR_FREEOBJECTS
:
2317 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2318 "invalid record type"));
2319 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2328 * Restores a backup of tosnap from the file descriptor specified by infd.
2331 zfs_receive_one(libzfs_handle_t
*hdl
, int infd
, const char *tosnap
,
2332 recvflags_t flags
, dmu_replay_record_t
*drr
,
2333 dmu_replay_record_t
*drr_noswap
, const char *sendfs
,
2334 nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
, char **top_zfs
, int cleanup_fd
,
2335 uint64_t *action_handlep
)
2337 zfs_cmd_t zc
= { 0 };
2339 int ioctl_err
, ioctl_errno
, err
;
2341 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
2343 char prop_errbuf
[1024];
2344 const char *chopprefix
;
2345 boolean_t newfs
= B_FALSE
;
2346 boolean_t stream_wantsnewfs
;
2347 uint64_t parent_snapguid
= 0;
2348 prop_changelist_t
*clp
= NULL
;
2349 nvlist_t
*snapprops_nvlist
= NULL
;
2350 zprop_errflags_t prop_errflags
;
2351 boolean_t recursive
;
2353 begin_time
= time(NULL
);
2355 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2358 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2361 if (stream_avl
!= NULL
) {
2363 nvlist_t
*fs
= fsavl_find(stream_avl
, drrb
->drr_toguid
,
2368 (void) nvlist_lookup_uint64(fs
, "parentfromsnap",
2370 err
= nvlist_lookup_nvlist(fs
, "props", &props
);
2372 VERIFY(0 == nvlist_alloc(&props
, NV_UNIQUE_NAME
, 0));
2374 if (flags
.canmountoff
) {
2375 VERIFY(0 == nvlist_add_uint64(props
,
2376 zfs_prop_to_name(ZFS_PROP_CANMOUNT
), 0));
2378 ret
= zcmd_write_src_nvlist(hdl
, &zc
, props
);
2382 if (0 == nvlist_lookup_nvlist(fs
, "snapprops", &props
)) {
2383 VERIFY(0 == nvlist_lookup_nvlist(props
,
2384 snapname
, &snapprops_nvlist
));
2394 * Determine how much of the snapshot name stored in the stream
2395 * we are going to tack on to the name they specified on the
2396 * command line, and how much we are going to chop off.
2398 * If they specified a snapshot, chop the entire name stored in
2403 * A filesystem was specified with -e. We want to tack on only
2404 * the tail of the sent snapshot path.
2406 if (strchr(tosnap
, '@')) {
2407 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2408 "argument - snapshot not allowed with -e"));
2409 return (zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
));
2412 chopprefix
= strrchr(sendfs
, '/');
2414 if (chopprefix
== NULL
) {
2416 * The tail is the poolname, so we need to
2417 * prepend a path separator.
2419 int len
= strlen(drrb
->drr_toname
);
2420 cp
= malloc(len
+ 2);
2422 (void) strcpy(&cp
[1], drrb
->drr_toname
);
2425 chopprefix
= drrb
->drr_toname
+ (chopprefix
- sendfs
);
2427 } else if (flags
.isprefix
) {
2429 * A filesystem was specified with -d. We want to tack on
2430 * everything but the first element of the sent snapshot path
2431 * (all but the pool name).
2433 if (strchr(tosnap
, '@')) {
2434 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2435 "argument - snapshot not allowed with -d"));
2436 return (zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
));
2439 chopprefix
= strchr(drrb
->drr_toname
, '/');
2440 if (chopprefix
== NULL
)
2441 chopprefix
= strchr(drrb
->drr_toname
, '@');
2442 } else if (strchr(tosnap
, '@') == NULL
) {
2444 * If a filesystem was specified without -d or -e, we want to
2445 * tack on everything after the fs specified by 'zfs send'.
2447 chopprefix
= drrb
->drr_toname
+ strlen(sendfs
);
2449 /* A snapshot was specified as an exact path (no -d or -e). */
2451 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2452 "cannot specify snapshot name for multi-snapshot "
2454 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2456 chopprefix
= drrb
->drr_toname
+ strlen(drrb
->drr_toname
);
2459 ASSERT(strstr(drrb
->drr_toname
, sendfs
) == drrb
->drr_toname
);
2460 ASSERT(chopprefix
> drrb
->drr_toname
);
2461 ASSERT(chopprefix
<= drrb
->drr_toname
+ strlen(drrb
->drr_toname
));
2462 ASSERT(chopprefix
[0] == '/' || chopprefix
[0] == '@' ||
2463 chopprefix
[0] == '\0');
2466 * Determine name of destination snapshot, store in zc_value.
2468 (void) strcpy(zc
.zc_top_ds
, tosnap
);
2469 (void) strcpy(zc
.zc_value
, tosnap
);
2470 (void) strncat(zc
.zc_value
, chopprefix
, sizeof (zc
.zc_value
));
2472 if (!zfs_name_valid(zc
.zc_value
, ZFS_TYPE_SNAPSHOT
)) {
2473 zcmd_free_nvlists(&zc
);
2474 return (zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
));
2478 * Determine the name of the origin snapshot, store in zc_string.
2480 if (drrb
->drr_flags
& DRR_FLAG_CLONE
) {
2481 if (guid_to_name(hdl
, tosnap
,
2482 drrb
->drr_fromguid
, zc
.zc_string
) != 0) {
2483 zcmd_free_nvlists(&zc
);
2484 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2485 "local origin for clone %s does not exist"),
2487 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
2490 (void) printf("found clone origin %s\n", zc
.zc_string
);
2493 stream_wantsnewfs
= (drrb
->drr_fromguid
== NULL
||
2494 (drrb
->drr_flags
& DRR_FLAG_CLONE
));
2496 if (stream_wantsnewfs
) {
2498 * if the parent fs does not exist, look for it based on
2499 * the parent snap GUID
2501 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2502 "cannot receive new filesystem stream"));
2504 (void) strcpy(zc
.zc_name
, zc
.zc_value
);
2505 cp
= strrchr(zc
.zc_name
, '/');
2509 !zfs_dataset_exists(hdl
, zc
.zc_name
, ZFS_TYPE_DATASET
)) {
2510 char suffix
[ZFS_MAXNAMELEN
];
2511 (void) strcpy(suffix
, strrchr(zc
.zc_value
, '/'));
2512 if (guid_to_name(hdl
, tosnap
, parent_snapguid
,
2513 zc
.zc_value
) == 0) {
2514 *strchr(zc
.zc_value
, '@') = '\0';
2515 (void) strcat(zc
.zc_value
, suffix
);
2520 * if the fs does not exist, look for it based on the
2523 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2524 "cannot receive incremental stream"));
2526 (void) strcpy(zc
.zc_name
, zc
.zc_value
);
2527 *strchr(zc
.zc_name
, '@') = '\0';
2530 * If the exact receive path was specified and this is the
2531 * topmost path in the stream, then if the fs does not exist we
2532 * should look no further.
2534 if ((flags
.isprefix
|| (*(chopprefix
= drrb
->drr_toname
+
2535 strlen(sendfs
)) != '\0' && *chopprefix
!= '@')) &&
2536 !zfs_dataset_exists(hdl
, zc
.zc_name
, ZFS_TYPE_DATASET
)) {
2537 char snap
[ZFS_MAXNAMELEN
];
2538 (void) strcpy(snap
, strchr(zc
.zc_value
, '@'));
2539 if (guid_to_name(hdl
, tosnap
, drrb
->drr_fromguid
,
2540 zc
.zc_value
) == 0) {
2541 *strchr(zc
.zc_value
, '@') = '\0';
2542 (void) strcat(zc
.zc_value
, snap
);
2547 (void) strcpy(zc
.zc_name
, zc
.zc_value
);
2548 *strchr(zc
.zc_name
, '@') = '\0';
2550 if (zfs_dataset_exists(hdl
, zc
.zc_name
, ZFS_TYPE_DATASET
)) {
2554 * Destination fs exists. Therefore this should either
2555 * be an incremental, or the stream specifies a new fs
2556 * (full stream or clone) and they want us to blow it
2557 * away (and have therefore specified -F and removed any
2560 if (stream_wantsnewfs
) {
2562 zcmd_free_nvlists(&zc
);
2563 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2564 "destination '%s' exists\n"
2565 "must specify -F to overwrite it"),
2567 return (zfs_error(hdl
, EZFS_EXISTS
, errbuf
));
2569 if (ioctl(hdl
->libzfs_fd
, ZFS_IOC_SNAPSHOT_LIST_NEXT
,
2571 zcmd_free_nvlists(&zc
);
2572 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2573 "destination has snapshots (eg. %s)\n"
2574 "must destroy them to overwrite it"),
2576 return (zfs_error(hdl
, EZFS_EXISTS
, errbuf
));
2580 if ((zhp
= zfs_open(hdl
, zc
.zc_name
,
2581 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
)) == NULL
) {
2582 zcmd_free_nvlists(&zc
);
2586 if (stream_wantsnewfs
&&
2587 zhp
->zfs_dmustats
.dds_origin
[0]) {
2588 zcmd_free_nvlists(&zc
);
2590 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2591 "destination '%s' is a clone\n"
2592 "must destroy it to overwrite it"),
2594 return (zfs_error(hdl
, EZFS_EXISTS
, errbuf
));
2597 if (!flags
.dryrun
&& zhp
->zfs_type
== ZFS_TYPE_FILESYSTEM
&&
2598 stream_wantsnewfs
) {
2599 /* We can't do online recv in this case */
2600 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0, 0);
2603 zcmd_free_nvlists(&zc
);
2606 if (changelist_prefix(clp
) != 0) {
2607 changelist_free(clp
);
2609 zcmd_free_nvlists(&zc
);
2616 * Destination filesystem does not exist. Therefore we better
2617 * be creating a new filesystem (either from a full backup, or
2618 * a clone). It would therefore be invalid if the user
2619 * specified only the pool name (i.e. if the destination name
2620 * contained no slash character).
2622 if (!stream_wantsnewfs
||
2623 (cp
= strrchr(zc
.zc_name
, '/')) == NULL
) {
2624 zcmd_free_nvlists(&zc
);
2625 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2626 "destination '%s' does not exist"), zc
.zc_name
);
2627 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
2631 * Trim off the final dataset component so we perform the
2632 * recvbackup ioctl to the filesystems's parent.
2636 if (flags
.isprefix
&& !flags
.istail
&& !flags
.dryrun
&&
2637 create_parents(hdl
, zc
.zc_value
, strlen(tosnap
)) != 0) {
2638 zcmd_free_nvlists(&zc
);
2639 return (zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
));
2645 zc
.zc_begin_record
= drr_noswap
->drr_u
.drr_begin
;
2646 zc
.zc_cookie
= infd
;
2647 zc
.zc_guid
= flags
.force
;
2648 if (flags
.verbose
) {
2649 (void) printf("%s %s stream of %s into %s\n",
2650 flags
.dryrun
? "would receive" : "receiving",
2651 drrb
->drr_fromguid
? "incremental" : "full",
2652 drrb
->drr_toname
, zc
.zc_value
);
2653 (void) fflush(stdout
);
2657 zcmd_free_nvlists(&zc
);
2658 return (recv_skip(hdl
, infd
, flags
.byteswap
));
2661 zc
.zc_nvlist_dst
= (uint64_t)(uintptr_t)prop_errbuf
;
2662 zc
.zc_nvlist_dst_size
= sizeof (prop_errbuf
);
2663 zc
.zc_cleanup_fd
= cleanup_fd
;
2664 zc
.zc_action_handle
= *action_handlep
;
2666 err
= ioctl_err
= zfs_ioctl(hdl
, ZFS_IOC_RECV
, &zc
);
2667 ioctl_errno
= errno
;
2668 prop_errflags
= (zprop_errflags_t
)zc
.zc_obj
;
2671 nvlist_t
*prop_errors
;
2672 VERIFY(0 == nvlist_unpack((void *)(uintptr_t)zc
.zc_nvlist_dst
,
2673 zc
.zc_nvlist_dst_size
, &prop_errors
, 0));
2675 nvpair_t
*prop_err
= NULL
;
2677 while ((prop_err
= nvlist_next_nvpair(prop_errors
,
2678 prop_err
)) != NULL
) {
2683 prop
= zfs_name_to_prop(nvpair_name(prop_err
));
2684 (void) nvpair_value_int32(prop_err
, &intval
);
2685 if (strcmp(nvpair_name(prop_err
),
2686 ZPROP_N_MORE_ERRORS
) == 0) {
2687 trunc_prop_errs(intval
);
2690 (void) snprintf(tbuf
, sizeof (tbuf
),
2691 dgettext(TEXT_DOMAIN
,
2692 "cannot receive %s property on %s"),
2693 nvpair_name(prop_err
), zc
.zc_name
);
2694 zfs_setprop_error(hdl
, prop
, intval
, tbuf
);
2697 nvlist_free(prop_errors
);
2700 zc
.zc_nvlist_dst
= 0;
2701 zc
.zc_nvlist_dst_size
= 0;
2702 zcmd_free_nvlists(&zc
);
2704 if (err
== 0 && snapprops_nvlist
) {
2705 zfs_cmd_t zc2
= { 0 };
2707 (void) strcpy(zc2
.zc_name
, zc
.zc_value
);
2708 zc2
.zc_cookie
= B_TRUE
; /* received */
2709 if (zcmd_write_src_nvlist(hdl
, &zc2
, snapprops_nvlist
) == 0) {
2710 (void) zfs_ioctl(hdl
, ZFS_IOC_SET_PROP
, &zc2
);
2711 zcmd_free_nvlists(&zc2
);
2715 if (err
&& (ioctl_errno
== ENOENT
|| ioctl_errno
== EEXIST
)) {
2717 * It may be that this snapshot already exists,
2718 * in which case we want to consume & ignore it
2719 * rather than failing.
2721 avl_tree_t
*local_avl
;
2722 nvlist_t
*local_nv
, *fs
;
2723 cp
= strchr(zc
.zc_value
, '@');
2726 * XXX Do this faster by just iterating over snaps in
2727 * this fs. Also if zc_value does not exist, we will
2728 * get a strange "does not exist" error message.
2731 if (gather_nvlist(hdl
, zc
.zc_value
, NULL
, NULL
, B_FALSE
,
2732 &local_nv
, &local_avl
) == 0) {
2734 fs
= fsavl_find(local_avl
, drrb
->drr_toguid
, NULL
);
2735 fsavl_destroy(local_avl
);
2736 nvlist_free(local_nv
);
2739 if (flags
.verbose
) {
2740 (void) printf("snap %s already exists; "
2741 "ignoring\n", zc
.zc_value
);
2743 err
= ioctl_err
= recv_skip(hdl
, infd
,
2750 if (ioctl_err
!= 0) {
2751 switch (ioctl_errno
) {
2753 cp
= strchr(zc
.zc_value
, '@');
2755 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2756 "most recent snapshot of %s does not\n"
2757 "match incremental source"), zc
.zc_value
);
2758 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
2762 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2763 "destination %s has been modified\n"
2764 "since most recent snapshot"), zc
.zc_name
);
2765 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
2768 cp
= strchr(zc
.zc_value
, '@');
2770 /* it's the containing fs that exists */
2773 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2774 "destination already exists"));
2775 (void) zfs_error_fmt(hdl
, EZFS_EXISTS
,
2776 dgettext(TEXT_DOMAIN
, "cannot restore to %s"),
2781 (void) zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2784 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2785 "invalid stream (checksum mismatch)"));
2786 (void) zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2789 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2790 "pool must be upgraded to receive this stream."));
2791 (void) zfs_error(hdl
, EZFS_BADVERSION
, errbuf
);
2794 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2795 "destination %s space quota exceeded"), zc
.zc_name
);
2796 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
2799 (void) zfs_standard_error(hdl
, ioctl_errno
, errbuf
);
2804 * Mount the target filesystem (if created). Also mount any
2805 * children of the target filesystem if we did a replication
2806 * receive (indicated by stream_avl being non-NULL).
2808 cp
= strchr(zc
.zc_value
, '@');
2809 if (cp
&& (ioctl_err
== 0 || !newfs
)) {
2813 h
= zfs_open(hdl
, zc
.zc_value
,
2814 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
2816 if (h
->zfs_type
== ZFS_TYPE_VOLUME
) {
2818 } else if (newfs
|| stream_avl
) {
2820 * Track the first/top of hierarchy fs,
2821 * for mounting and sharing later.
2823 if (top_zfs
&& *top_zfs
== NULL
)
2824 *top_zfs
= zfs_strdup(hdl
, zc
.zc_value
);
2832 err
|= changelist_postfix(clp
);
2833 changelist_free(clp
);
2836 if (prop_errflags
& ZPROP_ERR_NOCLEAR
) {
2837 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
, "Warning: "
2838 "failed to clear unreceived properties on %s"),
2840 (void) fprintf(stderr
, "\n");
2842 if (prop_errflags
& ZPROP_ERR_NORESTORE
) {
2843 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
, "Warning: "
2844 "failed to restore original properties on %s"),
2846 (void) fprintf(stderr
, "\n");
2849 if (err
|| ioctl_err
)
2852 *action_handlep
= zc
.zc_action_handle
;
2854 if (flags
.verbose
) {
2857 uint64_t bytes
= zc
.zc_cookie
;
2858 time_t delta
= time(NULL
) - begin_time
;
2861 zfs_nicenum(bytes
, buf1
, sizeof (buf1
));
2862 zfs_nicenum(bytes
/delta
, buf2
, sizeof (buf1
));
2864 (void) printf("received %sB stream in %lu seconds (%sB/sec)\n",
2872 zfs_receive_impl(libzfs_handle_t
*hdl
, const char *tosnap
, recvflags_t flags
,
2873 int infd
, const char *sendfs
, nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
,
2874 char **top_zfs
, int cleanup_fd
, uint64_t *action_handlep
)
2877 dmu_replay_record_t drr
, drr_noswap
;
2878 struct drr_begin
*drrb
= &drr
.drr_u
.drr_begin
;
2880 zio_cksum_t zcksum
= { 0 };
2881 uint64_t featureflags
;
2884 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2887 if (flags
.isprefix
&&
2888 !zfs_dataset_exists(hdl
, tosnap
, ZFS_TYPE_DATASET
)) {
2889 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "specified fs "
2890 "(%s) does not exist"), tosnap
);
2891 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
2894 /* read in the BEGIN record */
2895 if (0 != (err
= recv_read(hdl
, infd
, &drr
, sizeof (drr
), B_FALSE
,
2899 if (drr
.drr_type
== DRR_END
|| drr
.drr_type
== BSWAP_32(DRR_END
)) {
2900 /* It's the double end record at the end of a package */
2904 /* the kernel needs the non-byteswapped begin record */
2907 flags
.byteswap
= B_FALSE
;
2908 if (drrb
->drr_magic
== BSWAP_64(DMU_BACKUP_MAGIC
)) {
2910 * We computed the checksum in the wrong byteorder in
2911 * recv_read() above; do it again correctly.
2913 bzero(&zcksum
, sizeof (zio_cksum_t
));
2914 fletcher_4_incremental_byteswap(&drr
, sizeof (drr
), &zcksum
);
2915 flags
.byteswap
= B_TRUE
;
2917 drr
.drr_type
= BSWAP_32(drr
.drr_type
);
2918 drr
.drr_payloadlen
= BSWAP_32(drr
.drr_payloadlen
);
2919 drrb
->drr_magic
= BSWAP_64(drrb
->drr_magic
);
2920 drrb
->drr_versioninfo
= BSWAP_64(drrb
->drr_versioninfo
);
2921 drrb
->drr_creation_time
= BSWAP_64(drrb
->drr_creation_time
);
2922 drrb
->drr_type
= BSWAP_32(drrb
->drr_type
);
2923 drrb
->drr_flags
= BSWAP_32(drrb
->drr_flags
);
2924 drrb
->drr_toguid
= BSWAP_64(drrb
->drr_toguid
);
2925 drrb
->drr_fromguid
= BSWAP_64(drrb
->drr_fromguid
);
2928 if (drrb
->drr_magic
!= DMU_BACKUP_MAGIC
|| drr
.drr_type
!= DRR_BEGIN
) {
2929 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2930 "stream (bad magic number)"));
2931 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2934 featureflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
2935 hdrtype
= DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
);
2937 if (!DMU_STREAM_SUPPORTED(featureflags
) ||
2938 (hdrtype
!= DMU_SUBSTREAM
&& hdrtype
!= DMU_COMPOUNDSTREAM
)) {
2939 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2940 "stream has unsupported feature, feature flags = %lx"),
2942 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2945 if (strchr(drrb
->drr_toname
, '@') == NULL
) {
2946 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2947 "stream (bad snapshot name)"));
2948 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2951 if (DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) == DMU_SUBSTREAM
) {
2952 char nonpackage_sendfs
[ZFS_MAXNAMELEN
];
2953 if (sendfs
== NULL
) {
2955 * We were not called from zfs_receive_package(). Get
2956 * the fs specified by 'zfs send'.
2959 (void) strlcpy(nonpackage_sendfs
,
2960 drr
.drr_u
.drr_begin
.drr_toname
, ZFS_MAXNAMELEN
);
2961 if ((cp
= strchr(nonpackage_sendfs
, '@')) != NULL
)
2963 sendfs
= nonpackage_sendfs
;
2965 return (zfs_receive_one(hdl
, infd
, tosnap
, flags
,
2966 &drr
, &drr_noswap
, sendfs
, stream_nv
, stream_avl
,
2967 top_zfs
, cleanup_fd
, action_handlep
));
2969 assert(DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) ==
2970 DMU_COMPOUNDSTREAM
);
2971 return (zfs_receive_package(hdl
, infd
, tosnap
, flags
,
2972 &drr
, &zcksum
, top_zfs
, cleanup_fd
, action_handlep
));
2977 * Restores a backup of tosnap from the file descriptor specified by infd.
2978 * Return 0 on total success, -2 if some things couldn't be
2979 * destroyed/renamed/promoted, -1 if some things couldn't be received.
2980 * (-1 will override -2).
2983 zfs_receive(libzfs_handle_t
*hdl
, const char *tosnap
, recvflags_t flags
,
2984 int infd
, avl_tree_t
*stream_avl
)
2986 char *top_zfs
= NULL
;
2989 uint64_t action_handle
= 0;
2991 cleanup_fd
= open(ZFS_DEV
, O_RDWR
|O_EXCL
);
2992 VERIFY(cleanup_fd
>= 0);
2994 err
= zfs_receive_impl(hdl
, tosnap
, flags
, infd
, NULL
, NULL
,
2995 stream_avl
, &top_zfs
, cleanup_fd
, &action_handle
);
2997 VERIFY(0 == close(cleanup_fd
));
2999 if (err
== 0 && !flags
.nomount
&& top_zfs
) {
3001 prop_changelist_t
*clp
;
3003 zhp
= zfs_open(hdl
, top_zfs
, ZFS_TYPE_FILESYSTEM
);
3005 clp
= changelist_gather(zhp
, ZFS_PROP_MOUNTPOINT
,
3006 CL_GATHER_MOUNT_ALWAYS
, 0);
3009 /* mount and share received datasets */
3010 err
= changelist_postfix(clp
);
3011 changelist_free(clp
);
3014 if (zhp
== NULL
|| clp
== NULL
|| err
)