4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012 by Delphix. All rights reserved.
25 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2013 Steven Hartland. All rights reserved.
39 #include <sys/mount.h>
46 #include "zfs_namecheck.h"
48 #include "zfs_fletcher.h"
49 #include "libzfs_impl.h"
51 #include <sys/zio_checksum.h>
54 /* in libzfs_dataset.c */
55 extern void zfs_setprop_error(libzfs_handle_t
*, zfs_prop_t
, int, char *);
57 static int zfs_receive_impl(libzfs_handle_t
*, const char *, recvflags_t
*,
58 int, const char *, nvlist_t
*, avl_tree_t
*, char **, int, uint64_t *);
60 static const zio_cksum_t zero_cksum
= { 0 };
62 typedef struct dedup_arg
{
65 libzfs_handle_t
*dedup_hdl
;
68 typedef struct progress_arg
{
71 boolean_t pa_parsable
;
74 typedef struct dataref
{
80 typedef struct dedup_entry
{
81 struct dedup_entry
*dde_next
;
82 zio_cksum_t dde_chksum
;
87 #define MAX_DDT_PHYSMEM_PERCENT 20
88 #define SMALLEST_POSSIBLE_MAX_DDT_MB 128
90 typedef struct dedup_table
{
91 dedup_entry_t
**dedup_hash_array
;
92 umem_cache_t
*ddecache
;
93 uint64_t max_ddt_size
; /* max dedup table size in bytes */
94 uint64_t cur_ddt_size
; /* current dedup table size in bytes */
101 high_order_bit(uint64_t n
)
105 for (count
= 0; n
!= 0; count
++)
111 ssread(void *buf
, size_t len
, FILE *stream
)
115 if ((outlen
= fread(buf
, len
, 1, stream
)) == 0)
122 ddt_hash_append(libzfs_handle_t
*hdl
, dedup_table_t
*ddt
, dedup_entry_t
**ddepp
,
123 zio_cksum_t
*cs
, uint64_t prop
, dataref_t
*dr
)
127 if (ddt
->cur_ddt_size
>= ddt
->max_ddt_size
) {
128 if (ddt
->ddt_full
== B_FALSE
) {
129 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
130 "Dedup table full. Deduplication will continue "
131 "with existing table entries"));
132 ddt
->ddt_full
= B_TRUE
;
137 if ((dde
= umem_cache_alloc(ddt
->ddecache
, UMEM_DEFAULT
))
139 assert(*ddepp
== NULL
);
140 dde
->dde_next
= NULL
;
141 dde
->dde_chksum
= *cs
;
142 dde
->dde_prop
= prop
;
145 ddt
->cur_ddt_size
+= sizeof (dedup_entry_t
);
151 * Using the specified dedup table, do a lookup for an entry with
152 * the checksum cs. If found, return the block's reference info
153 * in *dr. Otherwise, insert a new entry in the dedup table, using
154 * the reference information specified by *dr.
156 * return value: true - entry was found
157 * false - entry was not found
160 ddt_update(libzfs_handle_t
*hdl
, dedup_table_t
*ddt
, zio_cksum_t
*cs
,
161 uint64_t prop
, dataref_t
*dr
)
164 dedup_entry_t
**ddepp
;
166 hashcode
= BF64_GET(cs
->zc_word
[0], 0, ddt
->numhashbits
);
168 for (ddepp
= &(ddt
->dedup_hash_array
[hashcode
]); *ddepp
!= NULL
;
169 ddepp
= &((*ddepp
)->dde_next
)) {
170 if (ZIO_CHECKSUM_EQUAL(((*ddepp
)->dde_chksum
), *cs
) &&
171 (*ddepp
)->dde_prop
== prop
) {
172 *dr
= (*ddepp
)->dde_ref
;
176 ddt_hash_append(hdl
, ddt
, ddepp
, cs
, prop
, dr
);
181 cksum_and_write(const void *buf
, uint64_t len
, zio_cksum_t
*zc
, int outfd
)
183 fletcher_4_incremental_native(buf
, len
, zc
);
184 return (write(outfd
, buf
, len
));
188 * This function is started in a separate thread when the dedup option
189 * has been requested. The main send thread determines the list of
190 * snapshots to be included in the send stream and makes the ioctl calls
191 * for each one. But instead of having the ioctl send the output to the
192 * the output fd specified by the caller of zfs_send()), the
193 * ioctl is told to direct the output to a pipe, which is read by the
194 * alternate thread running THIS function. This function does the
196 * 1. building a dedup table (the DDT)
197 * 2. doing checksums on each data block and inserting a record in the DDT
198 * 3. looking for matching checksums, and
199 * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever
200 * a duplicate block is found.
201 * The output of this function then goes to the output fd requested
202 * by the caller of zfs_send().
207 dedup_arg_t
*dda
= arg
;
208 char *buf
= malloc(1<<20);
209 dmu_replay_record_t thedrr
;
210 dmu_replay_record_t
*drr
= &thedrr
;
211 struct drr_begin
*drrb
= &thedrr
.drr_u
.drr_begin
;
212 struct drr_end
*drre
= &thedrr
.drr_u
.drr_end
;
213 struct drr_object
*drro
= &thedrr
.drr_u
.drr_object
;
214 struct drr_write
*drrw
= &thedrr
.drr_u
.drr_write
;
215 struct drr_spill
*drrs
= &thedrr
.drr_u
.drr_spill
;
218 dmu_replay_record_t wbr_drr
= {0};
219 struct drr_write_byref
*wbr_drrr
= &wbr_drr
.drr_u
.drr_write_byref
;
221 zio_cksum_t stream_cksum
;
222 uint64_t physmem
= sysconf(_SC_PHYS_PAGES
) * sysconf(_SC_PAGESIZE
);
226 MAX((physmem
* MAX_DDT_PHYSMEM_PERCENT
)/100,
227 SMALLEST_POSSIBLE_MAX_DDT_MB
<<20);
229 numbuckets
= ddt
.max_ddt_size
/(sizeof (dedup_entry_t
));
232 * numbuckets must be a power of 2. Increase number to
233 * a power of 2 if necessary.
235 if (!ISP2(numbuckets
))
236 numbuckets
= 1 << high_order_bit(numbuckets
);
238 ddt
.dedup_hash_array
= calloc(numbuckets
, sizeof (dedup_entry_t
*));
239 ddt
.ddecache
= umem_cache_create("dde", sizeof (dedup_entry_t
), 0,
240 NULL
, NULL
, NULL
, NULL
, NULL
, 0);
241 ddt
.cur_ddt_size
= numbuckets
* sizeof (dedup_entry_t
*);
242 ddt
.numhashbits
= high_order_bit(numbuckets
) - 1;
243 ddt
.ddt_full
= B_FALSE
;
245 /* Initialize the write-by-reference block. */
246 wbr_drr
.drr_type
= DRR_WRITE_BYREF
;
247 wbr_drr
.drr_payloadlen
= 0;
249 outfd
= dda
->outputfd
;
250 ofp
= fdopen(dda
->inputfd
, "r");
251 while (ssread(drr
, sizeof (dmu_replay_record_t
), ofp
) != 0) {
253 switch (drr
->drr_type
) {
257 ZIO_SET_CHECKSUM(&stream_cksum
, 0, 0, 0, 0);
259 /* set the DEDUP feature flag for this stream */
260 fflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
261 fflags
|= (DMU_BACKUP_FEATURE_DEDUP
|
262 DMU_BACKUP_FEATURE_DEDUPPROPS
);
263 DMU_SET_FEATUREFLAGS(drrb
->drr_versioninfo
, fflags
);
265 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
266 &stream_cksum
, outfd
) == -1)
268 if (DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) ==
269 DMU_COMPOUNDSTREAM
&& drr
->drr_payloadlen
!= 0) {
270 int sz
= drr
->drr_payloadlen
;
276 (void) ssread(buf
, sz
, ofp
);
279 if (cksum_and_write(buf
, sz
, &stream_cksum
,
288 /* use the recalculated checksum */
289 ZIO_SET_CHECKSUM(&drre
->drr_checksum
,
290 stream_cksum
.zc_word
[0], stream_cksum
.zc_word
[1],
291 stream_cksum
.zc_word
[2], stream_cksum
.zc_word
[3]);
292 if ((write(outfd
, drr
,
293 sizeof (dmu_replay_record_t
))) == -1)
300 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
301 &stream_cksum
, outfd
) == -1)
303 if (drro
->drr_bonuslen
> 0) {
305 P2ROUNDUP((uint64_t)drro
->drr_bonuslen
, 8),
307 if (cksum_and_write(buf
,
308 P2ROUNDUP((uint64_t)drro
->drr_bonuslen
, 8),
309 &stream_cksum
, outfd
) == -1)
317 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
318 &stream_cksum
, outfd
) == -1)
320 (void) ssread(buf
, drrs
->drr_length
, ofp
);
321 if (cksum_and_write(buf
, drrs
->drr_length
,
322 &stream_cksum
, outfd
) == -1)
327 case DRR_FREEOBJECTS
:
329 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
330 &stream_cksum
, outfd
) == -1)
339 (void) ssread(buf
, drrw
->drr_length
, ofp
);
342 * Use the existing checksum if it's dedup-capable,
343 * else calculate a SHA256 checksum for it.
346 if (ZIO_CHECKSUM_EQUAL(drrw
->drr_key
.ddk_cksum
,
348 !DRR_IS_DEDUP_CAPABLE(drrw
->drr_checksumflags
)) {
350 zio_cksum_t tmpsha256
;
353 SHA256Update(&ctx
, buf
, drrw
->drr_length
);
354 SHA256Final(&tmpsha256
, &ctx
);
355 drrw
->drr_key
.ddk_cksum
.zc_word
[0] =
356 BE_64(tmpsha256
.zc_word
[0]);
357 drrw
->drr_key
.ddk_cksum
.zc_word
[1] =
358 BE_64(tmpsha256
.zc_word
[1]);
359 drrw
->drr_key
.ddk_cksum
.zc_word
[2] =
360 BE_64(tmpsha256
.zc_word
[2]);
361 drrw
->drr_key
.ddk_cksum
.zc_word
[3] =
362 BE_64(tmpsha256
.zc_word
[3]);
363 drrw
->drr_checksumtype
= ZIO_CHECKSUM_SHA256
;
364 drrw
->drr_checksumflags
= DRR_CHECKSUM_DEDUP
;
367 dataref
.ref_guid
= drrw
->drr_toguid
;
368 dataref
.ref_object
= drrw
->drr_object
;
369 dataref
.ref_offset
= drrw
->drr_offset
;
371 if (ddt_update(dda
->dedup_hdl
, &ddt
,
372 &drrw
->drr_key
.ddk_cksum
, drrw
->drr_key
.ddk_prop
,
374 /* block already present in stream */
375 wbr_drrr
->drr_object
= drrw
->drr_object
;
376 wbr_drrr
->drr_offset
= drrw
->drr_offset
;
377 wbr_drrr
->drr_length
= drrw
->drr_length
;
378 wbr_drrr
->drr_toguid
= drrw
->drr_toguid
;
379 wbr_drrr
->drr_refguid
= dataref
.ref_guid
;
380 wbr_drrr
->drr_refobject
=
382 wbr_drrr
->drr_refoffset
=
385 wbr_drrr
->drr_checksumtype
=
386 drrw
->drr_checksumtype
;
387 wbr_drrr
->drr_checksumflags
=
388 drrw
->drr_checksumtype
;
389 wbr_drrr
->drr_key
.ddk_cksum
=
390 drrw
->drr_key
.ddk_cksum
;
391 wbr_drrr
->drr_key
.ddk_prop
=
392 drrw
->drr_key
.ddk_prop
;
394 if (cksum_and_write(&wbr_drr
,
395 sizeof (dmu_replay_record_t
), &stream_cksum
,
399 /* block not previously seen */
400 if (cksum_and_write(drr
,
401 sizeof (dmu_replay_record_t
), &stream_cksum
,
404 if (cksum_and_write(buf
,
406 &stream_cksum
, outfd
) == -1)
414 if (cksum_and_write(drr
, sizeof (dmu_replay_record_t
),
415 &stream_cksum
, outfd
) == -1)
421 (void) printf("INVALID record type 0x%x\n",
423 /* should never happen, so assert */
428 umem_cache_destroy(ddt
.ddecache
);
429 free(ddt
.dedup_hash_array
);
437 * Routines for dealing with the AVL tree of fs-nvlists
439 typedef struct fsavl_node
{
447 fsavl_compare(const void *arg1
, const void *arg2
)
449 const fsavl_node_t
*fn1
= arg1
;
450 const fsavl_node_t
*fn2
= arg2
;
452 if (fn1
->fn_guid
> fn2
->fn_guid
)
454 else if (fn1
->fn_guid
< fn2
->fn_guid
)
461 * Given the GUID of a snapshot, find its containing filesystem and
465 fsavl_find(avl_tree_t
*avl
, uint64_t snapguid
, char **snapname
)
467 fsavl_node_t fn_find
;
470 fn_find
.fn_guid
= snapguid
;
472 fn
= avl_find(avl
, &fn_find
, NULL
);
475 *snapname
= fn
->fn_snapname
;
476 return (fn
->fn_nvfs
);
482 fsavl_destroy(avl_tree_t
*avl
)
491 while ((fn
= avl_destroy_nodes(avl
, &cookie
)) != NULL
)
498 * Given an nvlist, produce an avl tree of snapshots, ordered by guid
501 fsavl_create(nvlist_t
*fss
)
504 nvpair_t
*fselem
= NULL
;
506 if ((fsavl
= malloc(sizeof (avl_tree_t
))) == NULL
)
509 avl_create(fsavl
, fsavl_compare
, sizeof (fsavl_node_t
),
510 offsetof(fsavl_node_t
, fn_node
));
512 while ((fselem
= nvlist_next_nvpair(fss
, fselem
)) != NULL
) {
513 nvlist_t
*nvfs
, *snaps
;
514 nvpair_t
*snapelem
= NULL
;
516 VERIFY(0 == nvpair_value_nvlist(fselem
, &nvfs
));
517 VERIFY(0 == nvlist_lookup_nvlist(nvfs
, "snaps", &snaps
));
520 nvlist_next_nvpair(snaps
, snapelem
)) != NULL
) {
524 VERIFY(0 == nvpair_value_uint64(snapelem
, &guid
));
525 if ((fn
= malloc(sizeof (fsavl_node_t
))) == NULL
) {
526 fsavl_destroy(fsavl
);
530 fn
->fn_snapname
= nvpair_name(snapelem
);
534 * Note: if there are multiple snaps with the
535 * same GUID, we ignore all but one.
537 if (avl_find(fsavl
, fn
, NULL
) == NULL
)
548 * Routines for dealing with the giant nvlist of fs-nvlists, etc.
550 typedef struct send_data
{
551 uint64_t parent_fromsnap_guid
;
552 nvlist_t
*parent_snaps
;
555 const char *fromsnap
;
560 * The header nvlist is of the following format:
563 * "fromsnap" -> string (if incremental)
567 * "name" -> string (full name; for debugging)
568 * "parentfromsnap" -> number (guid of fromsnap in parent)
570 * "props" -> { name -> value (only if set here) }
571 * "snaps" -> { name (lastname) -> number (guid) }
572 * "snapprops" -> { name (lastname) -> { name -> value } }
574 * "origin" -> number (guid) (if clone)
575 * "sent" -> boolean (not on-disk)
583 static void send_iterate_prop(zfs_handle_t
*zhp
, nvlist_t
*nv
);
586 send_iterate_snap(zfs_handle_t
*zhp
, void *arg
)
588 send_data_t
*sd
= arg
;
589 uint64_t guid
= zhp
->zfs_dmustats
.dds_guid
;
593 snapname
= strrchr(zhp
->zfs_name
, '@')+1;
595 VERIFY(0 == nvlist_add_uint64(sd
->parent_snaps
, snapname
, guid
));
597 * NB: if there is no fromsnap here (it's a newly created fs in
598 * an incremental replication), we will substitute the tosnap.
600 if ((sd
->fromsnap
&& strcmp(snapname
, sd
->fromsnap
) == 0) ||
601 (sd
->parent_fromsnap_guid
== 0 && sd
->tosnap
&&
602 strcmp(snapname
, sd
->tosnap
) == 0)) {
603 sd
->parent_fromsnap_guid
= guid
;
606 VERIFY(0 == nvlist_alloc(&nv
, NV_UNIQUE_NAME
, 0));
607 send_iterate_prop(zhp
, nv
);
608 VERIFY(0 == nvlist_add_nvlist(sd
->snapprops
, snapname
, nv
));
616 send_iterate_prop(zfs_handle_t
*zhp
, nvlist_t
*nv
)
618 nvpair_t
*elem
= NULL
;
620 while ((elem
= nvlist_next_nvpair(zhp
->zfs_props
, elem
)) != NULL
) {
621 char *propname
= nvpair_name(elem
);
622 zfs_prop_t prop
= zfs_name_to_prop(propname
);
625 if (!zfs_prop_user(propname
)) {
627 * Realistically, this should never happen. However,
628 * we want the ability to add DSL properties without
629 * needing to make incompatible version changes. We
630 * need to ignore unknown properties to allow older
631 * software to still send datasets containing these
632 * properties, with the unknown properties elided.
634 if (prop
== ZPROP_INVAL
)
637 if (zfs_prop_readonly(prop
))
641 verify(nvpair_value_nvlist(elem
, &propnv
) == 0);
642 if (prop
== ZFS_PROP_QUOTA
|| prop
== ZFS_PROP_RESERVATION
||
643 prop
== ZFS_PROP_REFQUOTA
||
644 prop
== ZFS_PROP_REFRESERVATION
) {
647 verify(nvlist_lookup_uint64(propnv
,
648 ZPROP_VALUE
, &value
) == 0);
649 if (zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
)
652 * May have no source before SPA_VERSION_RECVD_PROPS,
653 * but is still modifiable.
655 if (nvlist_lookup_string(propnv
,
656 ZPROP_SOURCE
, &source
) == 0) {
657 if ((strcmp(source
, zhp
->zfs_name
) != 0) &&
659 ZPROP_SOURCE_VAL_RECVD
) != 0))
664 if (nvlist_lookup_string(propnv
,
665 ZPROP_SOURCE
, &source
) != 0)
667 if ((strcmp(source
, zhp
->zfs_name
) != 0) &&
668 (strcmp(source
, ZPROP_SOURCE_VAL_RECVD
) != 0))
672 if (zfs_prop_user(propname
) ||
673 zfs_prop_get_type(prop
) == PROP_TYPE_STRING
) {
675 verify(nvlist_lookup_string(propnv
,
676 ZPROP_VALUE
, &value
) == 0);
677 VERIFY(0 == nvlist_add_string(nv
, propname
, value
));
680 verify(nvlist_lookup_uint64(propnv
,
681 ZPROP_VALUE
, &value
) == 0);
682 VERIFY(0 == nvlist_add_uint64(nv
, propname
, value
));
688 * recursively generate nvlists describing datasets. See comment
689 * for the data structure send_data_t above for description of contents
693 send_iterate_fs(zfs_handle_t
*zhp
, void *arg
)
695 send_data_t
*sd
= arg
;
698 uint64_t parent_fromsnap_guid_save
= sd
->parent_fromsnap_guid
;
699 uint64_t guid
= zhp
->zfs_dmustats
.dds_guid
;
702 VERIFY(0 == nvlist_alloc(&nvfs
, NV_UNIQUE_NAME
, 0));
703 VERIFY(0 == nvlist_add_string(nvfs
, "name", zhp
->zfs_name
));
704 VERIFY(0 == nvlist_add_uint64(nvfs
, "parentfromsnap",
705 sd
->parent_fromsnap_guid
));
707 if (zhp
->zfs_dmustats
.dds_origin
[0]) {
708 zfs_handle_t
*origin
= zfs_open(zhp
->zfs_hdl
,
709 zhp
->zfs_dmustats
.dds_origin
, ZFS_TYPE_SNAPSHOT
);
712 VERIFY(0 == nvlist_add_uint64(nvfs
, "origin",
713 origin
->zfs_dmustats
.dds_guid
));
716 /* iterate over props */
717 VERIFY(0 == nvlist_alloc(&nv
, NV_UNIQUE_NAME
, 0));
718 send_iterate_prop(zhp
, nv
);
719 VERIFY(0 == nvlist_add_nvlist(nvfs
, "props", nv
));
722 /* iterate over snaps, and set sd->parent_fromsnap_guid */
723 sd
->parent_fromsnap_guid
= 0;
724 VERIFY(0 == nvlist_alloc(&sd
->parent_snaps
, NV_UNIQUE_NAME
, 0));
725 VERIFY(0 == nvlist_alloc(&sd
->snapprops
, NV_UNIQUE_NAME
, 0));
726 (void) zfs_iter_snapshots(zhp
, send_iterate_snap
, sd
);
727 VERIFY(0 == nvlist_add_nvlist(nvfs
, "snaps", sd
->parent_snaps
));
728 VERIFY(0 == nvlist_add_nvlist(nvfs
, "snapprops", sd
->snapprops
));
729 nvlist_free(sd
->parent_snaps
);
730 nvlist_free(sd
->snapprops
);
732 /* add this fs to nvlist */
733 (void) snprintf(guidstring
, sizeof (guidstring
),
734 "0x%llx", (longlong_t
)guid
);
735 VERIFY(0 == nvlist_add_nvlist(sd
->fss
, guidstring
, nvfs
));
738 /* iterate over children */
740 rv
= zfs_iter_filesystems(zhp
, send_iterate_fs
, sd
);
742 sd
->parent_fromsnap_guid
= parent_fromsnap_guid_save
;
749 gather_nvlist(libzfs_handle_t
*hdl
, const char *fsname
, const char *fromsnap
,
750 const char *tosnap
, boolean_t recursive
, nvlist_t
**nvlp
, avl_tree_t
**avlp
)
753 send_data_t sd
= { 0 };
756 zhp
= zfs_open(hdl
, fsname
, ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
758 return (EZFS_BADTYPE
);
760 VERIFY(0 == nvlist_alloc(&sd
.fss
, NV_UNIQUE_NAME
, 0));
761 sd
.fromsnap
= fromsnap
;
763 sd
.recursive
= recursive
;
765 if ((error
= send_iterate_fs(zhp
, &sd
)) != 0) {
773 if (avlp
!= NULL
&& (*avlp
= fsavl_create(sd
.fss
)) == NULL
) {
784 * Routines specific to "zfs send"
786 typedef struct send_dump_data
{
787 /* these are all just the short snapname (the part after the @) */
788 const char *fromsnap
;
790 char prevsnap
[ZFS_MAXNAMELEN
];
791 uint64_t prevsnap_obj
;
792 boolean_t seenfrom
, seento
, replicate
, doall
, fromorigin
;
793 boolean_t verbose
, dryrun
, parsable
, progress
;
799 snapfilter_cb_t
*filter_cb
;
802 char holdtag
[ZFS_MAXNAMELEN
];
808 estimate_ioctl(zfs_handle_t
*zhp
, uint64_t fromsnap_obj
,
809 boolean_t fromorigin
, uint64_t *sizep
)
811 zfs_cmd_t zc
= { 0 };
812 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
814 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
815 assert(fromsnap_obj
== 0 || !fromorigin
);
817 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
818 zc
.zc_obj
= fromorigin
;
819 zc
.zc_sendobj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
820 zc
.zc_fromobj
= fromsnap_obj
;
821 zc
.zc_guid
= 1; /* estimate flag */
823 if (zfs_ioctl(zhp
->zfs_hdl
, ZFS_IOC_SEND
, &zc
) != 0) {
825 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
826 "warning: cannot estimate space for '%s'"), zhp
->zfs_name
);
830 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
831 "not an earlier snapshot from the same fs"));
832 return (zfs_error(hdl
, EZFS_CROSSTARGET
, errbuf
));
835 if (zfs_dataset_exists(hdl
, zc
.zc_name
,
836 ZFS_TYPE_SNAPSHOT
)) {
837 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
838 "incremental source (@%s) does not exist"),
841 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
854 zfs_error_aux(hdl
, strerror(errno
));
855 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
858 return (zfs_standard_error(hdl
, errno
, errbuf
));
862 *sizep
= zc
.zc_objset_type
;
868 * Dumps a backup of the given snapshot (incremental from fromsnap if it's not
869 * NULL) to the file descriptor specified by outfd.
872 dump_ioctl(zfs_handle_t
*zhp
, const char *fromsnap
, uint64_t fromsnap_obj
,
873 boolean_t fromorigin
, int outfd
, nvlist_t
*debugnv
)
875 zfs_cmd_t zc
= { 0 };
876 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
879 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
880 assert(fromsnap_obj
== 0 || !fromorigin
);
882 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
883 zc
.zc_cookie
= outfd
;
884 zc
.zc_obj
= fromorigin
;
885 zc
.zc_sendobj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
886 zc
.zc_fromobj
= fromsnap_obj
;
888 VERIFY(0 == nvlist_alloc(&thisdbg
, NV_UNIQUE_NAME
, 0));
889 if (fromsnap
&& fromsnap
[0] != '\0') {
890 VERIFY(0 == nvlist_add_string(thisdbg
,
891 "fromsnap", fromsnap
));
894 if (zfs_ioctl(zhp
->zfs_hdl
, ZFS_IOC_SEND
, &zc
) != 0) {
896 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
897 "warning: cannot send '%s'"), zhp
->zfs_name
);
899 VERIFY(0 == nvlist_add_uint64(thisdbg
, "error", errno
));
901 VERIFY(0 == nvlist_add_nvlist(debugnv
,
902 zhp
->zfs_name
, thisdbg
));
904 nvlist_free(thisdbg
);
908 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
909 "not an earlier snapshot from the same fs"));
910 return (zfs_error(hdl
, EZFS_CROSSTARGET
, errbuf
));
913 if (zfs_dataset_exists(hdl
, zc
.zc_name
,
914 ZFS_TYPE_SNAPSHOT
)) {
915 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
916 "incremental source (@%s) does not exist"),
919 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
932 zfs_error_aux(hdl
, strerror(errno
));
933 return (zfs_error(hdl
, EZFS_BADBACKUP
, errbuf
));
936 return (zfs_standard_error(hdl
, errno
, errbuf
));
941 VERIFY(0 == nvlist_add_nvlist(debugnv
, zhp
->zfs_name
, thisdbg
));
942 nvlist_free(thisdbg
);
948 gather_holds(zfs_handle_t
*zhp
, send_dump_data_t
*sdd
)
950 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
953 * zfs_send() only sets snapholds for sends that need them,
954 * e.g. replication and doall.
956 if (sdd
->snapholds
== NULL
)
959 fnvlist_add_string(sdd
->snapholds
, zhp
->zfs_name
, sdd
->holdtag
);
963 send_progress_thread(void *arg
)
965 progress_arg_t
*pa
= arg
;
967 zfs_cmd_t zc
= { 0 };
968 zfs_handle_t
*zhp
= pa
->pa_zhp
;
969 libzfs_handle_t
*hdl
= zhp
->zfs_hdl
;
970 unsigned long long bytes
;
976 assert(zhp
->zfs_type
== ZFS_TYPE_SNAPSHOT
);
977 (void) strlcpy(zc
.zc_name
, zhp
->zfs_name
, sizeof (zc
.zc_name
));
979 if (!pa
->pa_parsable
)
980 (void) fprintf(stderr
, "TIME SENT SNAPSHOT\n");
983 * Print the progress from ZFS_IOC_SEND_PROGRESS every second.
988 zc
.zc_cookie
= pa
->pa_fd
;
989 if (zfs_ioctl(hdl
, ZFS_IOC_SEND_PROGRESS
, &zc
) != 0)
994 bytes
= zc
.zc_cookie
;
996 if (pa
->pa_parsable
) {
997 (void) fprintf(stderr
, "%02d:%02d:%02d\t%llu\t%s\n",
998 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
,
999 bytes
, zhp
->zfs_name
);
1001 zfs_nicenum(bytes
, buf
, sizeof (buf
));
1002 (void) fprintf(stderr
, "%02d:%02d:%02d %5s %s\n",
1003 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
,
1004 buf
, zhp
->zfs_name
);
1010 dump_snapshot(zfs_handle_t
*zhp
, void *arg
)
1012 send_dump_data_t
*sdd
= arg
;
1013 progress_arg_t pa
= { 0 };
1017 boolean_t isfromsnap
, istosnap
, fromorigin
;
1018 boolean_t exclude
= B_FALSE
;
1021 thissnap
= strchr(zhp
->zfs_name
, '@') + 1;
1022 isfromsnap
= (sdd
->fromsnap
!= NULL
&&
1023 strcmp(sdd
->fromsnap
, thissnap
) == 0);
1025 if (!sdd
->seenfrom
&& isfromsnap
) {
1026 gather_holds(zhp
, sdd
);
1027 sdd
->seenfrom
= B_TRUE
;
1028 (void) strcpy(sdd
->prevsnap
, thissnap
);
1029 sdd
->prevsnap_obj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
1034 if (sdd
->seento
|| !sdd
->seenfrom
) {
1039 istosnap
= (strcmp(sdd
->tosnap
, thissnap
) == 0);
1041 sdd
->seento
= B_TRUE
;
1043 if (!sdd
->doall
&& !isfromsnap
&& !istosnap
) {
1044 if (sdd
->replicate
) {
1046 nvlist_t
*snapprops
;
1048 * Filter out all intermediate snapshots except origin
1049 * snapshots needed to replicate clones.
1051 nvlist_t
*nvfs
= fsavl_find(sdd
->fsavl
,
1052 zhp
->zfs_dmustats
.dds_guid
, &snapname
);
1054 VERIFY(0 == nvlist_lookup_nvlist(nvfs
,
1055 "snapprops", &snapprops
));
1056 VERIFY(0 == nvlist_lookup_nvlist(snapprops
,
1057 thissnap
, &snapprops
));
1058 exclude
= !nvlist_exists(snapprops
, "is_clone_origin");
1065 * If a filter function exists, call it to determine whether
1066 * this snapshot will be sent.
1068 if (exclude
|| (sdd
->filter_cb
!= NULL
&&
1069 sdd
->filter_cb(zhp
, sdd
->filter_cb_arg
) == B_FALSE
)) {
1071 * This snapshot is filtered out. Don't send it, and don't
1072 * set prevsnap_obj, so it will be as if this snapshot didn't
1073 * exist, and the next accepted snapshot will be sent as
1074 * an incremental from the last accepted one, or as the
1075 * first (and full) snapshot in the case of a replication,
1076 * non-incremental send.
1082 gather_holds(zhp
, sdd
);
1083 fromorigin
= sdd
->prevsnap
[0] == '\0' &&
1084 (sdd
->fromorigin
|| sdd
->replicate
);
1088 err
= estimate_ioctl(zhp
, sdd
->prevsnap_obj
,
1091 if (sdd
->parsable
) {
1092 if (sdd
->prevsnap
[0] != '\0') {
1093 (void) fprintf(stderr
, "incremental\t%s\t%s",
1094 sdd
->prevsnap
, zhp
->zfs_name
);
1096 (void) fprintf(stderr
, "full\t%s",
1100 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1101 "send from @%s to %s"),
1102 sdd
->prevsnap
, zhp
->zfs_name
);
1105 if (sdd
->parsable
) {
1106 (void) fprintf(stderr
, "\t%llu\n",
1110 zfs_nicenum(size
, buf
, sizeof (buf
));
1111 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1112 " estimated size is %s\n"), buf
);
1116 (void) fprintf(stderr
, "\n");
1122 * If progress reporting is requested, spawn a new thread to
1123 * poll ZFS_IOC_SEND_PROGRESS at a regular interval.
1125 if (sdd
->progress
) {
1127 pa
.pa_fd
= sdd
->outfd
;
1128 pa
.pa_parsable
= sdd
->parsable
;
1130 if (err
= pthread_create(&tid
, NULL
,
1131 send_progress_thread
, &pa
)) {
1137 err
= dump_ioctl(zhp
, sdd
->prevsnap
, sdd
->prevsnap_obj
,
1138 fromorigin
, sdd
->outfd
, sdd
->debugnv
);
1140 if (sdd
->progress
) {
1141 (void) pthread_cancel(tid
);
1142 (void) pthread_join(tid
, NULL
);
1146 (void) strcpy(sdd
->prevsnap
, thissnap
);
1147 sdd
->prevsnap_obj
= zfs_prop_get_int(zhp
, ZFS_PROP_OBJSETID
);
1153 dump_filesystem(zfs_handle_t
*zhp
, void *arg
)
1156 send_dump_data_t
*sdd
= arg
;
1157 boolean_t missingfrom
= B_FALSE
;
1158 zfs_cmd_t zc
= { 0 };
1160 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
), "%s@%s",
1161 zhp
->zfs_name
, sdd
->tosnap
);
1162 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
, ZFS_IOC_OBJSET_STATS
, &zc
) != 0) {
1163 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1164 "WARNING: could not send %s@%s: does not exist\n"),
1165 zhp
->zfs_name
, sdd
->tosnap
);
1170 if (sdd
->replicate
&& sdd
->fromsnap
) {
1172 * If this fs does not have fromsnap, and we're doing
1173 * recursive, we need to send a full stream from the
1174 * beginning (or an incremental from the origin if this
1175 * is a clone). If we're doing non-recursive, then let
1176 * them get the error.
1178 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
), "%s@%s",
1179 zhp
->zfs_name
, sdd
->fromsnap
);
1180 if (ioctl(zhp
->zfs_hdl
->libzfs_fd
,
1181 ZFS_IOC_OBJSET_STATS
, &zc
) != 0) {
1182 missingfrom
= B_TRUE
;
1186 sdd
->seenfrom
= sdd
->seento
= sdd
->prevsnap
[0] = 0;
1187 sdd
->prevsnap_obj
= 0;
1188 if (sdd
->fromsnap
== NULL
|| missingfrom
)
1189 sdd
->seenfrom
= B_TRUE
;
1191 rv
= zfs_iter_snapshots_sorted(zhp
, dump_snapshot
, arg
);
1192 if (!sdd
->seenfrom
) {
1193 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1194 "WARNING: could not send %s@%s:\n"
1195 "incremental source (%s@%s) does not exist\n"),
1196 zhp
->zfs_name
, sdd
->tosnap
,
1197 zhp
->zfs_name
, sdd
->fromsnap
);
1199 } else if (!sdd
->seento
) {
1200 if (sdd
->fromsnap
) {
1201 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1202 "WARNING: could not send %s@%s:\n"
1203 "incremental source (%s@%s) "
1204 "is not earlier than it\n"),
1205 zhp
->zfs_name
, sdd
->tosnap
,
1206 zhp
->zfs_name
, sdd
->fromsnap
);
1208 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1210 "could not send %s@%s: does not exist\n"),
1211 zhp
->zfs_name
, sdd
->tosnap
);
1220 dump_filesystems(zfs_handle_t
*rzhp
, void *arg
)
1222 send_dump_data_t
*sdd
= arg
;
1224 boolean_t needagain
, progress
;
1226 if (!sdd
->replicate
)
1227 return (dump_filesystem(rzhp
, sdd
));
1229 /* Mark the clone origin snapshots. */
1230 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1231 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1233 uint64_t origin_guid
= 0;
1235 VERIFY(0 == nvpair_value_nvlist(fspair
, &nvfs
));
1236 (void) nvlist_lookup_uint64(nvfs
, "origin", &origin_guid
);
1237 if (origin_guid
!= 0) {
1239 nvlist_t
*origin_nv
= fsavl_find(sdd
->fsavl
,
1240 origin_guid
, &snapname
);
1241 if (origin_nv
!= NULL
) {
1242 nvlist_t
*snapprops
;
1243 VERIFY(0 == nvlist_lookup_nvlist(origin_nv
,
1244 "snapprops", &snapprops
));
1245 VERIFY(0 == nvlist_lookup_nvlist(snapprops
,
1246 snapname
, &snapprops
));
1247 VERIFY(0 == nvlist_add_boolean(
1248 snapprops
, "is_clone_origin"));
1253 needagain
= progress
= B_FALSE
;
1254 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1255 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1256 nvlist_t
*fslist
, *parent_nv
;
1260 uint64_t origin_guid
= 0;
1261 uint64_t parent_guid
= 0;
1263 VERIFY(nvpair_value_nvlist(fspair
, &fslist
) == 0);
1264 if (nvlist_lookup_boolean(fslist
, "sent") == 0)
1267 VERIFY(nvlist_lookup_string(fslist
, "name", &fsname
) == 0);
1268 (void) nvlist_lookup_uint64(fslist
, "origin", &origin_guid
);
1269 (void) nvlist_lookup_uint64(fslist
, "parentfromsnap",
1272 if (parent_guid
!= 0) {
1273 parent_nv
= fsavl_find(sdd
->fsavl
, parent_guid
, NULL
);
1274 if (!nvlist_exists(parent_nv
, "sent")) {
1275 /* parent has not been sent; skip this one */
1281 if (origin_guid
!= 0) {
1282 nvlist_t
*origin_nv
= fsavl_find(sdd
->fsavl
,
1284 if (origin_nv
!= NULL
&&
1285 !nvlist_exists(origin_nv
, "sent")) {
1287 * origin has not been sent yet;
1295 zhp
= zfs_open(rzhp
->zfs_hdl
, fsname
, ZFS_TYPE_DATASET
);
1298 err
= dump_filesystem(zhp
, sdd
);
1299 VERIFY(nvlist_add_boolean(fslist
, "sent") == 0);
1310 /* clean out the sent flags in case we reuse this fss */
1311 for (fspair
= nvlist_next_nvpair(sdd
->fss
, NULL
); fspair
;
1312 fspair
= nvlist_next_nvpair(sdd
->fss
, fspair
)) {
1315 VERIFY(nvpair_value_nvlist(fspair
, &fslist
) == 0);
1316 (void) nvlist_remove_all(fslist
, "sent");
1323 * Generate a send stream for the dataset identified by the argument zhp.
1325 * The content of the send stream is the snapshot identified by
1326 * 'tosnap'. Incremental streams are requested in two ways:
1327 * - from the snapshot identified by "fromsnap" (if non-null) or
1328 * - from the origin of the dataset identified by zhp, which must
1329 * be a clone. In this case, "fromsnap" is null and "fromorigin"
1332 * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and
1333 * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM)
1334 * if "replicate" is set. If "doall" is set, dump all the intermediate
1335 * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall"
1336 * case too. If "props" is set, send properties.
1339 zfs_send(zfs_handle_t
*zhp
, const char *fromsnap
, const char *tosnap
,
1340 sendflags_t
*flags
, int outfd
, snapfilter_cb_t filter_func
,
1341 void *cb_arg
, nvlist_t
**debugnvp
)
1344 send_dump_data_t sdd
= { 0 };
1346 nvlist_t
*fss
= NULL
;
1347 avl_tree_t
*fsavl
= NULL
;
1348 static uint64_t holdseq
;
1352 dedup_arg_t dda
= { 0 };
1353 int featureflags
= 0;
1355 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
1356 "cannot send '%s'"), zhp
->zfs_name
);
1358 if (fromsnap
&& fromsnap
[0] == '\0') {
1359 zfs_error_aux(zhp
->zfs_hdl
, dgettext(TEXT_DOMAIN
,
1360 "zero-length incremental source"));
1361 return (zfs_error(zhp
->zfs_hdl
, EZFS_NOENT
, errbuf
));
1364 if (zhp
->zfs_type
== ZFS_TYPE_FILESYSTEM
) {
1366 version
= zfs_prop_get_int(zhp
, ZFS_PROP_VERSION
);
1367 if (version
>= ZPL_VERSION_SA
) {
1368 featureflags
|= DMU_BACKUP_FEATURE_SA_SPILL
;
1372 if (flags
->dedup
&& !flags
->dryrun
) {
1373 featureflags
|= (DMU_BACKUP_FEATURE_DEDUP
|
1374 DMU_BACKUP_FEATURE_DEDUPPROPS
);
1375 if (err
= pipe(pipefd
)) {
1376 zfs_error_aux(zhp
->zfs_hdl
, strerror(errno
));
1377 return (zfs_error(zhp
->zfs_hdl
, EZFS_PIPEFAILED
,
1380 dda
.outputfd
= outfd
;
1381 dda
.inputfd
= pipefd
[1];
1382 dda
.dedup_hdl
= zhp
->zfs_hdl
;
1383 if (err
= pthread_create(&tid
, NULL
, cksummer
, &dda
)) {
1384 (void) close(pipefd
[0]);
1385 (void) close(pipefd
[1]);
1386 zfs_error_aux(zhp
->zfs_hdl
, strerror(errno
));
1387 return (zfs_error(zhp
->zfs_hdl
,
1388 EZFS_THREADCREATEFAILED
, errbuf
));
1392 if (flags
->replicate
|| flags
->doall
|| flags
->props
) {
1393 dmu_replay_record_t drr
= { 0 };
1394 char *packbuf
= NULL
;
1396 zio_cksum_t zc
= { 0 };
1398 if (flags
->replicate
|| flags
->props
) {
1401 VERIFY(0 == nvlist_alloc(&hdrnv
, NV_UNIQUE_NAME
, 0));
1403 VERIFY(0 == nvlist_add_string(hdrnv
,
1404 "fromsnap", fromsnap
));
1406 VERIFY(0 == nvlist_add_string(hdrnv
, "tosnap", tosnap
));
1407 if (!flags
->replicate
) {
1408 VERIFY(0 == nvlist_add_boolean(hdrnv
,
1412 err
= gather_nvlist(zhp
->zfs_hdl
, zhp
->zfs_name
,
1413 fromsnap
, tosnap
, flags
->replicate
, &fss
, &fsavl
);
1416 VERIFY(0 == nvlist_add_nvlist(hdrnv
, "fss", fss
));
1417 err
= nvlist_pack(hdrnv
, &packbuf
, &buflen
,
1427 if (!flags
->dryrun
) {
1428 /* write first begin record */
1429 drr
.drr_type
= DRR_BEGIN
;
1430 drr
.drr_u
.drr_begin
.drr_magic
= DMU_BACKUP_MAGIC
;
1431 DMU_SET_STREAM_HDRTYPE(drr
.drr_u
.drr_begin
.
1432 drr_versioninfo
, DMU_COMPOUNDSTREAM
);
1433 DMU_SET_FEATUREFLAGS(drr
.drr_u
.drr_begin
.
1434 drr_versioninfo
, featureflags
);
1435 (void) snprintf(drr
.drr_u
.drr_begin
.drr_toname
,
1436 sizeof (drr
.drr_u
.drr_begin
.drr_toname
),
1437 "%s@%s", zhp
->zfs_name
, tosnap
);
1438 drr
.drr_payloadlen
= buflen
;
1439 err
= cksum_and_write(&drr
, sizeof (drr
), &zc
, outfd
);
1441 /* write header nvlist */
1442 if (err
!= -1 && packbuf
!= NULL
) {
1443 err
= cksum_and_write(packbuf
, buflen
, &zc
,
1452 /* write end record */
1453 bzero(&drr
, sizeof (drr
));
1454 drr
.drr_type
= DRR_END
;
1455 drr
.drr_u
.drr_end
.drr_checksum
= zc
;
1456 err
= write(outfd
, &drr
, sizeof (drr
));
1466 /* dump each stream */
1467 sdd
.fromsnap
= fromsnap
;
1468 sdd
.tosnap
= tosnap
;
1470 sdd
.outfd
= pipefd
[0];
1473 sdd
.replicate
= flags
->replicate
;
1474 sdd
.doall
= flags
->doall
;
1475 sdd
.fromorigin
= flags
->fromorigin
;
1478 sdd
.verbose
= flags
->verbose
;
1479 sdd
.parsable
= flags
->parsable
;
1480 sdd
.progress
= flags
->progress
;
1481 sdd
.dryrun
= flags
->dryrun
;
1482 sdd
.filter_cb
= filter_func
;
1483 sdd
.filter_cb_arg
= cb_arg
;
1485 sdd
.debugnv
= *debugnvp
;
1488 * Some flags require that we place user holds on the datasets that are
1489 * being sent so they don't get destroyed during the send. We can skip
1490 * this step if the pool is imported read-only since the datasets cannot
1493 if (!flags
->dryrun
&& !zpool_get_prop_int(zfs_get_pool_handle(zhp
),
1494 ZPOOL_PROP_READONLY
, NULL
) &&
1495 zfs_spa_version(zhp
, &spa_version
) == 0 &&
1496 spa_version
>= SPA_VERSION_USERREFS
&&
1497 (flags
->doall
|| flags
->replicate
)) {
1499 (void) snprintf(sdd
.holdtag
, sizeof (sdd
.holdtag
),
1500 ".send-%d-%llu", getpid(), (u_longlong_t
)holdseq
);
1501 sdd
.cleanup_fd
= open(ZFS_DEV
, O_RDWR
|O_EXCL
);
1502 if (sdd
.cleanup_fd
< 0) {
1506 sdd
.snapholds
= fnvlist_alloc();
1508 sdd
.cleanup_fd
= -1;
1509 sdd
.snapholds
= NULL
;
1511 if (flags
->verbose
|| sdd
.snapholds
!= NULL
) {
1513 * Do a verbose no-op dry run to get all the verbose output
1514 * or to gather snapshot hold's before generating any data,
1515 * then do a non-verbose real run to generate the streams.
1517 sdd
.dryrun
= B_TRUE
;
1518 err
= dump_filesystems(zhp
, &sdd
);
1523 if (flags
->verbose
) {
1524 if (flags
->parsable
) {
1525 (void) fprintf(stderr
, "size\t%llu\n",
1526 (longlong_t
)sdd
.size
);
1529 zfs_nicenum(sdd
.size
, buf
, sizeof (buf
));
1530 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
1531 "total estimated size is %s\n"), buf
);
1535 /* Ensure no snaps found is treated as an error. */
1541 /* Skip the second run if dryrun was requested. */
1545 if (sdd
.snapholds
!= NULL
) {
1546 err
= zfs_hold_nvl(zhp
, sdd
.cleanup_fd
, sdd
.snapholds
);
1550 fnvlist_free(sdd
.snapholds
);
1551 sdd
.snapholds
= NULL
;
1554 sdd
.dryrun
= B_FALSE
;
1555 sdd
.verbose
= B_FALSE
;
1558 err
= dump_filesystems(zhp
, &sdd
);
1559 fsavl_destroy(fsavl
);
1562 /* Ensure no snaps found is treated as an error. */
1563 if (err
== 0 && !sdd
.seento
)
1568 (void) pthread_cancel(tid
);
1569 (void) close(pipefd
[0]);
1570 (void) pthread_join(tid
, NULL
);
1573 if (sdd
.cleanup_fd
!= -1) {
1574 VERIFY(0 == close(sdd
.cleanup_fd
));
1575 sdd
.cleanup_fd
= -1;
1578 if (!flags
->dryrun
&& (flags
->replicate
|| flags
->doall
||
1581 * write final end record. NB: want to do this even if
1582 * there was some error, because it might not be totally
1585 dmu_replay_record_t drr
= { 0 };
1586 drr
.drr_type
= DRR_END
;
1587 if (write(outfd
, &drr
, sizeof (drr
)) == -1) {
1588 return (zfs_standard_error(zhp
->zfs_hdl
,
1593 return (err
|| sdd
.err
);
1596 err
= zfs_standard_error(zhp
->zfs_hdl
, err
, errbuf
);
1598 fsavl_destroy(fsavl
);
1600 fnvlist_free(sdd
.snapholds
);
1602 if (sdd
.cleanup_fd
!= -1)
1603 VERIFY(0 == close(sdd
.cleanup_fd
));
1605 (void) pthread_cancel(tid
);
1606 (void) close(pipefd
[0]);
1607 (void) pthread_join(tid
, NULL
);
1613 * Routines specific to "zfs recv"
1617 recv_read(libzfs_handle_t
*hdl
, int fd
, void *buf
, int ilen
,
1618 boolean_t byteswap
, zio_cksum_t
*zc
)
1625 rv
= read(fd
, cp
, len
);
1630 if (rv
< 0 || len
!= 0) {
1631 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
1632 "failed to read from stream"));
1633 return (zfs_error(hdl
, EZFS_BADSTREAM
, dgettext(TEXT_DOMAIN
,
1634 "cannot receive")));
1639 fletcher_4_incremental_byteswap(buf
, ilen
, zc
);
1641 fletcher_4_incremental_native(buf
, ilen
, zc
);
1647 recv_read_nvlist(libzfs_handle_t
*hdl
, int fd
, int len
, nvlist_t
**nvp
,
1648 boolean_t byteswap
, zio_cksum_t
*zc
)
1653 buf
= zfs_alloc(hdl
, len
);
1657 err
= recv_read(hdl
, fd
, buf
, len
, byteswap
, zc
);
1663 err
= nvlist_unpack(buf
, len
, nvp
, 0);
1666 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
1667 "stream (malformed nvlist)"));
1674 recv_rename(libzfs_handle_t
*hdl
, const char *name
, const char *tryname
,
1675 int baselen
, char *newname
, recvflags_t
*flags
)
1678 zfs_cmd_t zc
= { 0 };
1680 prop_changelist_t
*clp
;
1683 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
1686 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0,
1687 flags
->force
? MS_FORCE
: 0);
1691 err
= changelist_prefix(clp
);
1695 zc
.zc_objset_type
= DMU_OST_ZFS
;
1696 (void) strlcpy(zc
.zc_name
, name
, sizeof (zc
.zc_name
));
1699 (void) strcpy(newname
, tryname
);
1701 (void) strlcpy(zc
.zc_value
, tryname
, sizeof (zc
.zc_value
));
1703 if (flags
->verbose
) {
1704 (void) printf("attempting rename %s to %s\n",
1705 zc
.zc_name
, zc
.zc_value
);
1707 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_RENAME
, &zc
);
1709 changelist_rename(clp
, name
, tryname
);
1714 if (err
!= 0 && strncmp(name
+ baselen
, "recv-", 5) != 0) {
1717 (void) snprintf(newname
, ZFS_MAXNAMELEN
, "%.*srecv-%u-%u",
1718 baselen
, name
, getpid(), seq
);
1719 (void) strlcpy(zc
.zc_value
, newname
, sizeof (zc
.zc_value
));
1721 if (flags
->verbose
) {
1722 (void) printf("failed - trying rename %s to %s\n",
1723 zc
.zc_name
, zc
.zc_value
);
1725 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_RENAME
, &zc
);
1727 changelist_rename(clp
, name
, newname
);
1728 if (err
&& flags
->verbose
) {
1729 (void) printf("failed (%u) - "
1730 "will try again on next pass\n", errno
);
1733 } else if (flags
->verbose
) {
1735 (void) printf("success\n");
1737 (void) printf("failed (%u)\n", errno
);
1740 (void) changelist_postfix(clp
);
1741 changelist_free(clp
);
1747 recv_destroy(libzfs_handle_t
*hdl
, const char *name
, int baselen
,
1748 char *newname
, recvflags_t
*flags
)
1750 zfs_cmd_t zc
= { 0 };
1752 prop_changelist_t
*clp
;
1754 boolean_t defer
= B_FALSE
;
1757 zhp
= zfs_open(hdl
, name
, ZFS_TYPE_DATASET
);
1760 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0,
1761 flags
->force
? MS_FORCE
: 0);
1762 if (zfs_get_type(zhp
) == ZFS_TYPE_SNAPSHOT
&&
1763 zfs_spa_version(zhp
, &spa_version
) == 0 &&
1764 spa_version
>= SPA_VERSION_USERREFS
)
1769 err
= changelist_prefix(clp
);
1773 zc
.zc_objset_type
= DMU_OST_ZFS
;
1774 zc
.zc_defer_destroy
= defer
;
1775 (void) strlcpy(zc
.zc_name
, name
, sizeof (zc
.zc_name
));
1778 (void) printf("attempting destroy %s\n", zc
.zc_name
);
1779 err
= ioctl(hdl
->libzfs_fd
, ZFS_IOC_DESTROY
, &zc
);
1782 (void) printf("success\n");
1783 changelist_remove(clp
, zc
.zc_name
);
1786 (void) changelist_postfix(clp
);
1787 changelist_free(clp
);
1790 * Deferred destroy might destroy the snapshot or only mark it to be
1791 * destroyed later, and it returns success in either case.
1793 if (err
!= 0 || (defer
&& zfs_dataset_exists(hdl
, name
,
1794 ZFS_TYPE_SNAPSHOT
))) {
1795 err
= recv_rename(hdl
, name
, NULL
, baselen
, newname
, flags
);
1801 typedef struct guid_to_name_data
{
1805 } guid_to_name_data_t
;
1808 guid_to_name_cb(zfs_handle_t
*zhp
, void *arg
)
1810 guid_to_name_data_t
*gtnd
= arg
;
1813 if (gtnd
->skip
!= NULL
&&
1814 strcmp(zhp
->zfs_name
, gtnd
->skip
) == 0) {
1818 if (zhp
->zfs_dmustats
.dds_guid
== gtnd
->guid
) {
1819 (void) strcpy(gtnd
->name
, zhp
->zfs_name
);
1824 err
= zfs_iter_children(zhp
, guid_to_name_cb
, gtnd
);
1830 * Attempt to find the local dataset associated with this guid. In the case of
1831 * multiple matches, we attempt to find the "best" match by searching
1832 * progressively larger portions of the hierarchy. This allows one to send a
1833 * tree of datasets individually and guarantee that we will find the source
1834 * guid within that hierarchy, even if there are multiple matches elsewhere.
1837 guid_to_name(libzfs_handle_t
*hdl
, const char *parent
, uint64_t guid
,
1840 /* exhaustive search all local snapshots */
1841 char pname
[ZFS_MAXNAMELEN
];
1842 guid_to_name_data_t gtnd
;
1851 (void) strlcpy(pname
, parent
, sizeof (pname
));
1854 * Search progressively larger portions of the hierarchy. This will
1855 * select the "most local" version of the origin snapshot in the case
1856 * that there are multiple matching snapshots in the system.
1858 while ((cp
= strrchr(pname
, '/')) != NULL
) {
1860 /* Chop off the last component and open the parent */
1862 zhp
= make_dataset_handle(hdl
, pname
);
1867 err
= zfs_iter_children(zhp
, guid_to_name_cb
, >nd
);
1873 * Remember the dataset that we already searched, so we
1874 * skip it next time through.
1883 * Return +1 if guid1 is before guid2, 0 if they are the same, and -1 if
1884 * guid1 is after guid2.
1887 created_before(libzfs_handle_t
*hdl
, avl_tree_t
*avl
,
1888 uint64_t guid1
, uint64_t guid2
)
1891 char *fsname
, *snapname
;
1892 char buf
[ZFS_MAXNAMELEN
];
1894 zfs_handle_t
*guid1hdl
, *guid2hdl
;
1895 uint64_t create1
, create2
;
1902 nvfs
= fsavl_find(avl
, guid1
, &snapname
);
1903 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
1904 (void) snprintf(buf
, sizeof (buf
), "%s@%s", fsname
, snapname
);
1905 guid1hdl
= zfs_open(hdl
, buf
, ZFS_TYPE_SNAPSHOT
);
1906 if (guid1hdl
== NULL
)
1909 nvfs
= fsavl_find(avl
, guid2
, &snapname
);
1910 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
1911 (void) snprintf(buf
, sizeof (buf
), "%s@%s", fsname
, snapname
);
1912 guid2hdl
= zfs_open(hdl
, buf
, ZFS_TYPE_SNAPSHOT
);
1913 if (guid2hdl
== NULL
) {
1914 zfs_close(guid1hdl
);
1918 create1
= zfs_prop_get_int(guid1hdl
, ZFS_PROP_CREATETXG
);
1919 create2
= zfs_prop_get_int(guid2hdl
, ZFS_PROP_CREATETXG
);
1921 if (create1
< create2
)
1923 else if (create1
> create2
)
1928 zfs_close(guid1hdl
);
1929 zfs_close(guid2hdl
);
1935 recv_incremental_replication(libzfs_handle_t
*hdl
, const char *tofs
,
1936 recvflags_t
*flags
, nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
,
1940 avl_tree_t
*local_avl
;
1941 nvpair_t
*fselem
, *nextfselem
;
1943 char newname
[ZFS_MAXNAMELEN
];
1945 boolean_t needagain
, progress
, recursive
;
1948 VERIFY(0 == nvlist_lookup_string(stream_nv
, "fromsnap", &fromsnap
));
1950 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
1957 needagain
= progress
= B_FALSE
;
1959 if ((error
= gather_nvlist(hdl
, tofs
, fromsnap
, NULL
,
1960 recursive
, &local_nv
, &local_avl
)) != 0)
1964 * Process deletes and renames
1966 for (fselem
= nvlist_next_nvpair(local_nv
, NULL
);
1967 fselem
; fselem
= nextfselem
) {
1968 nvlist_t
*nvfs
, *snaps
;
1969 nvlist_t
*stream_nvfs
= NULL
;
1970 nvpair_t
*snapelem
, *nextsnapelem
;
1971 uint64_t fromguid
= 0;
1972 uint64_t originguid
= 0;
1973 uint64_t stream_originguid
= 0;
1974 uint64_t parent_fromsnap_guid
, stream_parent_fromsnap_guid
;
1975 char *fsname
, *stream_fsname
;
1977 nextfselem
= nvlist_next_nvpair(local_nv
, fselem
);
1979 VERIFY(0 == nvpair_value_nvlist(fselem
, &nvfs
));
1980 VERIFY(0 == nvlist_lookup_nvlist(nvfs
, "snaps", &snaps
));
1981 VERIFY(0 == nvlist_lookup_string(nvfs
, "name", &fsname
));
1982 VERIFY(0 == nvlist_lookup_uint64(nvfs
, "parentfromsnap",
1983 &parent_fromsnap_guid
));
1984 (void) nvlist_lookup_uint64(nvfs
, "origin", &originguid
);
1987 * First find the stream's fs, so we can check for
1988 * a different origin (due to "zfs promote")
1990 for (snapelem
= nvlist_next_nvpair(snaps
, NULL
);
1991 snapelem
; snapelem
= nvlist_next_nvpair(snaps
, snapelem
)) {
1994 VERIFY(0 == nvpair_value_uint64(snapelem
, &thisguid
));
1995 stream_nvfs
= fsavl_find(stream_avl
, thisguid
, NULL
);
1997 if (stream_nvfs
!= NULL
)
2001 /* check for promote */
2002 (void) nvlist_lookup_uint64(stream_nvfs
, "origin",
2003 &stream_originguid
);
2004 if (stream_nvfs
&& originguid
!= stream_originguid
) {
2005 switch (created_before(hdl
, local_avl
,
2006 stream_originguid
, originguid
)) {
2009 zfs_cmd_t zc
= { 0 };
2010 nvlist_t
*origin_nvfs
;
2011 char *origin_fsname
;
2014 (void) printf("promoting %s\n", fsname
);
2016 origin_nvfs
= fsavl_find(local_avl
, originguid
,
2018 VERIFY(0 == nvlist_lookup_string(origin_nvfs
,
2019 "name", &origin_fsname
));
2020 (void) strlcpy(zc
.zc_value
, origin_fsname
,
2021 sizeof (zc
.zc_value
));
2022 (void) strlcpy(zc
.zc_name
, fsname
,
2023 sizeof (zc
.zc_name
));
2024 error
= zfs_ioctl(hdl
, ZFS_IOC_PROMOTE
, &zc
);
2032 fsavl_destroy(local_avl
);
2033 nvlist_free(local_nv
);
2037 * We had/have the wrong origin, therefore our
2038 * list of snapshots is wrong. Need to handle
2039 * them on the next pass.
2045 for (snapelem
= nvlist_next_nvpair(snaps
, NULL
);
2046 snapelem
; snapelem
= nextsnapelem
) {
2048 char *stream_snapname
;
2049 nvlist_t
*found
, *props
;
2051 nextsnapelem
= nvlist_next_nvpair(snaps
, snapelem
);
2053 VERIFY(0 == nvpair_value_uint64(snapelem
, &thisguid
));
2054 found
= fsavl_find(stream_avl
, thisguid
,
2057 /* check for delete */
2058 if (found
== NULL
) {
2059 char name
[ZFS_MAXNAMELEN
];
2064 (void) snprintf(name
, sizeof (name
), "%s@%s",
2065 fsname
, nvpair_name(snapelem
));
2067 error
= recv_destroy(hdl
, name
,
2068 strlen(fsname
)+1, newname
, flags
);
2076 stream_nvfs
= found
;
2078 if (0 == nvlist_lookup_nvlist(stream_nvfs
, "snapprops",
2079 &props
) && 0 == nvlist_lookup_nvlist(props
,
2080 stream_snapname
, &props
)) {
2081 zfs_cmd_t zc
= { 0 };
2083 zc
.zc_cookie
= B_TRUE
; /* received */
2084 (void) snprintf(zc
.zc_name
, sizeof (zc
.zc_name
),
2085 "%s@%s", fsname
, nvpair_name(snapelem
));
2086 if (zcmd_write_src_nvlist(hdl
, &zc
,
2088 (void) zfs_ioctl(hdl
,
2089 ZFS_IOC_SET_PROP
, &zc
);
2090 zcmd_free_nvlists(&zc
);
2094 /* check for different snapname */
2095 if (strcmp(nvpair_name(snapelem
),
2096 stream_snapname
) != 0) {
2097 char name
[ZFS_MAXNAMELEN
];
2098 char tryname
[ZFS_MAXNAMELEN
];
2100 (void) snprintf(name
, sizeof (name
), "%s@%s",
2101 fsname
, nvpair_name(snapelem
));
2102 (void) snprintf(tryname
, sizeof (name
), "%s@%s",
2103 fsname
, stream_snapname
);
2105 error
= recv_rename(hdl
, name
, tryname
,
2106 strlen(fsname
)+1, newname
, flags
);
2113 if (strcmp(stream_snapname
, fromsnap
) == 0)
2114 fromguid
= thisguid
;
2117 /* check for delete */
2118 if (stream_nvfs
== NULL
) {
2122 error
= recv_destroy(hdl
, fsname
, strlen(tofs
)+1,
2131 if (fromguid
== 0) {
2132 if (flags
->verbose
) {
2133 (void) printf("local fs %s does not have "
2134 "fromsnap (%s in stream); must have "
2135 "been deleted locally; ignoring\n",
2141 VERIFY(0 == nvlist_lookup_string(stream_nvfs
,
2142 "name", &stream_fsname
));
2143 VERIFY(0 == nvlist_lookup_uint64(stream_nvfs
,
2144 "parentfromsnap", &stream_parent_fromsnap_guid
));
2146 s1
= strrchr(fsname
, '/');
2147 s2
= strrchr(stream_fsname
, '/');
2150 * Check for rename. If the exact receive path is specified, it
2151 * does not count as a rename, but we still need to check the
2152 * datasets beneath it.
2154 if ((stream_parent_fromsnap_guid
!= 0 &&
2155 parent_fromsnap_guid
!= 0 &&
2156 stream_parent_fromsnap_guid
!= parent_fromsnap_guid
) ||
2157 ((flags
->isprefix
|| strcmp(tofs
, fsname
) != 0) &&
2158 (s1
!= NULL
) && (s2
!= NULL
) && strcmp(s1
, s2
) != 0)) {
2160 char tryname
[ZFS_MAXNAMELEN
];
2162 parent
= fsavl_find(local_avl
,
2163 stream_parent_fromsnap_guid
, NULL
);
2165 * NB: parent might not be found if we used the
2166 * tosnap for stream_parent_fromsnap_guid,
2167 * because the parent is a newly-created fs;
2168 * we'll be able to rename it after we recv the
2171 if (parent
!= NULL
) {
2174 VERIFY(0 == nvlist_lookup_string(parent
, "name",
2176 (void) snprintf(tryname
, sizeof (tryname
),
2177 "%s%s", pname
, strrchr(stream_fsname
, '/'));
2180 if (flags
->verbose
) {
2181 (void) printf("local fs %s new parent "
2182 "not found\n", fsname
);
2188 error
= recv_rename(hdl
, fsname
, tryname
,
2189 strlen(tofs
)+1, newname
, flags
);
2191 if (renamed
!= NULL
&& newname
[0] != '\0') {
2192 VERIFY(0 == nvlist_add_boolean(renamed
,
2203 fsavl_destroy(local_avl
);
2204 nvlist_free(local_nv
);
2206 if (needagain
&& progress
) {
2207 /* do another pass to fix up temporary names */
2209 (void) printf("another pass:\n");
2217 zfs_receive_package(libzfs_handle_t
*hdl
, int fd
, const char *destname
,
2218 recvflags_t
*flags
, dmu_replay_record_t
*drr
, zio_cksum_t
*zc
,
2219 char **top_zfs
, int cleanup_fd
, uint64_t *action_handlep
)
2221 nvlist_t
*stream_nv
= NULL
;
2222 avl_tree_t
*stream_avl
= NULL
;
2223 char *fromsnap
= NULL
;
2225 char tofs
[ZFS_MAXNAMELEN
];
2226 char sendfs
[ZFS_MAXNAMELEN
];
2228 dmu_replay_record_t drre
;
2230 boolean_t anyerr
= B_FALSE
;
2231 boolean_t softerr
= B_FALSE
;
2232 boolean_t recursive
;
2234 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2237 assert(drr
->drr_type
== DRR_BEGIN
);
2238 assert(drr
->drr_u
.drr_begin
.drr_magic
== DMU_BACKUP_MAGIC
);
2239 assert(DMU_GET_STREAM_HDRTYPE(drr
->drr_u
.drr_begin
.drr_versioninfo
) ==
2240 DMU_COMPOUNDSTREAM
);
2243 * Read in the nvlist from the stream.
2245 if (drr
->drr_payloadlen
!= 0) {
2246 error
= recv_read_nvlist(hdl
, fd
, drr
->drr_payloadlen
,
2247 &stream_nv
, flags
->byteswap
, zc
);
2249 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2254 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2257 if (recursive
&& strchr(destname
, '@')) {
2258 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2259 "cannot specify snapshot name for multi-snapshot stream"));
2260 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2265 * Read in the end record and verify checksum.
2267 if (0 != (error
= recv_read(hdl
, fd
, &drre
, sizeof (drre
),
2268 flags
->byteswap
, NULL
)))
2270 if (flags
->byteswap
) {
2271 drre
.drr_type
= BSWAP_32(drre
.drr_type
);
2272 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[0] =
2273 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[0]);
2274 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[1] =
2275 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[1]);
2276 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[2] =
2277 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[2]);
2278 drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[3] =
2279 BSWAP_64(drre
.drr_u
.drr_end
.drr_checksum
.zc_word
[3]);
2281 if (drre
.drr_type
!= DRR_END
) {
2282 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2285 if (!ZIO_CHECKSUM_EQUAL(drre
.drr_u
.drr_end
.drr_checksum
, *zc
)) {
2286 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2287 "incorrect header checksum"));
2288 error
= zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2292 (void) nvlist_lookup_string(stream_nv
, "fromsnap", &fromsnap
);
2294 if (drr
->drr_payloadlen
!= 0) {
2295 nvlist_t
*stream_fss
;
2297 VERIFY(0 == nvlist_lookup_nvlist(stream_nv
, "fss",
2299 if ((stream_avl
= fsavl_create(stream_fss
)) == NULL
) {
2300 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2301 "couldn't allocate avl tree"));
2302 error
= zfs_error(hdl
, EZFS_NOMEM
, errbuf
);
2306 if (fromsnap
!= NULL
) {
2307 nvlist_t
*renamed
= NULL
;
2308 nvpair_t
*pair
= NULL
;
2310 (void) strlcpy(tofs
, destname
, ZFS_MAXNAMELEN
);
2311 if (flags
->isprefix
) {
2312 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
2315 if (flags
->istail
) {
2316 cp
= strrchr(drrb
->drr_toname
, '/');
2318 (void) strlcat(tofs
, "/",
2322 i
= (cp
- drrb
->drr_toname
);
2325 i
= strcspn(drrb
->drr_toname
, "/@");
2327 /* zfs_receive_one() will create_parents() */
2328 (void) strlcat(tofs
, &drrb
->drr_toname
[i
],
2330 *strchr(tofs
, '@') = '\0';
2333 if (recursive
&& !flags
->dryrun
&& !flags
->nomount
) {
2334 VERIFY(0 == nvlist_alloc(&renamed
,
2335 NV_UNIQUE_NAME
, 0));
2338 softerr
= recv_incremental_replication(hdl
, tofs
, flags
,
2339 stream_nv
, stream_avl
, renamed
);
2341 /* Unmount renamed filesystems before receiving. */
2342 while ((pair
= nvlist_next_nvpair(renamed
,
2345 prop_changelist_t
*clp
= NULL
;
2347 zhp
= zfs_open(hdl
, nvpair_name(pair
),
2348 ZFS_TYPE_FILESYSTEM
);
2350 clp
= changelist_gather(zhp
,
2351 ZFS_PROP_MOUNTPOINT
, 0, 0);
2355 changelist_prefix(clp
);
2356 changelist_free(clp
);
2361 nvlist_free(renamed
);
2366 * Get the fs specified by the first path in the stream (the top level
2367 * specified by 'zfs send') and pass it to each invocation of
2368 * zfs_receive_one().
2370 (void) strlcpy(sendfs
, drr
->drr_u
.drr_begin
.drr_toname
,
2372 if ((cp
= strchr(sendfs
, '@')) != NULL
)
2375 /* Finally, receive each contained stream */
2378 * we should figure out if it has a recoverable
2379 * error, in which case do a recv_skip() and drive on.
2380 * Note, if we fail due to already having this guid,
2381 * zfs_receive_one() will take care of it (ie,
2382 * recv_skip() and return 0).
2384 error
= zfs_receive_impl(hdl
, destname
, flags
, fd
,
2385 sendfs
, stream_nv
, stream_avl
, top_zfs
, cleanup_fd
,
2387 if (error
== ENODATA
) {
2392 } while (error
== 0);
2394 if (drr
->drr_payloadlen
!= 0 && fromsnap
!= NULL
) {
2396 * Now that we have the fs's they sent us, try the
2399 softerr
= recv_incremental_replication(hdl
, tofs
, flags
,
2400 stream_nv
, stream_avl
, NULL
);
2404 fsavl_destroy(stream_avl
);
2406 nvlist_free(stream_nv
);
2415 trunc_prop_errs(int truncated
)
2417 ASSERT(truncated
!= 0);
2420 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
2421 "1 more property could not be set\n"));
2423 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
,
2424 "%d more properties could not be set\n"), truncated
);
2428 recv_skip(libzfs_handle_t
*hdl
, int fd
, boolean_t byteswap
)
2430 dmu_replay_record_t
*drr
;
2431 void *buf
= malloc(1<<20);
2434 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2435 "cannot receive:"));
2437 /* XXX would be great to use lseek if possible... */
2440 while (recv_read(hdl
, fd
, drr
, sizeof (dmu_replay_record_t
),
2441 byteswap
, NULL
) == 0) {
2443 drr
->drr_type
= BSWAP_32(drr
->drr_type
);
2445 switch (drr
->drr_type
) {
2447 /* NB: not to be used on v2 stream packages */
2448 if (drr
->drr_payloadlen
!= 0) {
2449 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2450 "invalid substream header"));
2451 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2461 drr
->drr_u
.drr_object
.drr_bonuslen
=
2462 BSWAP_32(drr
->drr_u
.drr_object
.
2465 (void) recv_read(hdl
, fd
, buf
,
2466 P2ROUNDUP(drr
->drr_u
.drr_object
.drr_bonuslen
, 8),
2472 drr
->drr_u
.drr_write
.drr_length
=
2473 BSWAP_64(drr
->drr_u
.drr_write
.drr_length
);
2475 (void) recv_read(hdl
, fd
, buf
,
2476 drr
->drr_u
.drr_write
.drr_length
, B_FALSE
, NULL
);
2480 drr
->drr_u
.drr_write
.drr_length
=
2481 BSWAP_64(drr
->drr_u
.drr_spill
.drr_length
);
2483 (void) recv_read(hdl
, fd
, buf
,
2484 drr
->drr_u
.drr_spill
.drr_length
, B_FALSE
, NULL
);
2486 case DRR_WRITE_BYREF
:
2487 case DRR_FREEOBJECTS
:
2492 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2493 "invalid record type"));
2494 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2503 * Restores a backup of tosnap from the file descriptor specified by infd.
2506 zfs_receive_one(libzfs_handle_t
*hdl
, int infd
, const char *tosnap
,
2507 recvflags_t
*flags
, dmu_replay_record_t
*drr
,
2508 dmu_replay_record_t
*drr_noswap
, const char *sendfs
,
2509 nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
, char **top_zfs
, int cleanup_fd
,
2510 uint64_t *action_handlep
)
2512 zfs_cmd_t zc
= { 0 };
2514 int ioctl_err
, ioctl_errno
, err
;
2516 struct drr_begin
*drrb
= &drr
->drr_u
.drr_begin
;
2518 char prop_errbuf
[1024];
2519 const char *chopprefix
;
2520 boolean_t newfs
= B_FALSE
;
2521 boolean_t stream_wantsnewfs
;
2522 uint64_t parent_snapguid
= 0;
2523 prop_changelist_t
*clp
= NULL
;
2524 nvlist_t
*snapprops_nvlist
= NULL
;
2525 zprop_errflags_t prop_errflags
;
2526 boolean_t recursive
;
2528 begin_time
= time(NULL
);
2530 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2533 recursive
= (nvlist_lookup_boolean(stream_nv
, "not_recursive") ==
2536 if (stream_avl
!= NULL
) {
2538 nvlist_t
*fs
= fsavl_find(stream_avl
, drrb
->drr_toguid
,
2543 (void) nvlist_lookup_uint64(fs
, "parentfromsnap",
2545 err
= nvlist_lookup_nvlist(fs
, "props", &props
);
2547 VERIFY(0 == nvlist_alloc(&props
, NV_UNIQUE_NAME
, 0));
2549 if (flags
->canmountoff
) {
2550 VERIFY(0 == nvlist_add_uint64(props
,
2551 zfs_prop_to_name(ZFS_PROP_CANMOUNT
), 0));
2553 ret
= zcmd_write_src_nvlist(hdl
, &zc
, props
);
2557 if (0 == nvlist_lookup_nvlist(fs
, "snapprops", &props
)) {
2558 VERIFY(0 == nvlist_lookup_nvlist(props
,
2559 snapname
, &snapprops_nvlist
));
2569 * Determine how much of the snapshot name stored in the stream
2570 * we are going to tack on to the name they specified on the
2571 * command line, and how much we are going to chop off.
2573 * If they specified a snapshot, chop the entire name stored in
2576 if (flags
->istail
) {
2578 * A filesystem was specified with -e. We want to tack on only
2579 * the tail of the sent snapshot path.
2581 if (strchr(tosnap
, '@')) {
2582 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2583 "argument - snapshot not allowed with -e"));
2584 return (zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
));
2587 chopprefix
= strrchr(sendfs
, '/');
2589 if (chopprefix
== NULL
) {
2591 * The tail is the poolname, so we need to
2592 * prepend a path separator.
2594 int len
= strlen(drrb
->drr_toname
);
2595 cp
= malloc(len
+ 2);
2597 (void) strcpy(&cp
[1], drrb
->drr_toname
);
2600 chopprefix
= drrb
->drr_toname
+ (chopprefix
- sendfs
);
2602 } else if (flags
->isprefix
) {
2604 * A filesystem was specified with -d. We want to tack on
2605 * everything but the first element of the sent snapshot path
2606 * (all but the pool name).
2608 if (strchr(tosnap
, '@')) {
2609 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
2610 "argument - snapshot not allowed with -d"));
2611 return (zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
));
2614 chopprefix
= strchr(drrb
->drr_toname
, '/');
2615 if (chopprefix
== NULL
)
2616 chopprefix
= strchr(drrb
->drr_toname
, '@');
2617 } else if (strchr(tosnap
, '@') == NULL
) {
2619 * If a filesystem was specified without -d or -e, we want to
2620 * tack on everything after the fs specified by 'zfs send'.
2622 chopprefix
= drrb
->drr_toname
+ strlen(sendfs
);
2624 /* A snapshot was specified as an exact path (no -d or -e). */
2626 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2627 "cannot specify snapshot name for multi-snapshot "
2629 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
2631 chopprefix
= drrb
->drr_toname
+ strlen(drrb
->drr_toname
);
2634 ASSERT(strstr(drrb
->drr_toname
, sendfs
) == drrb
->drr_toname
);
2635 ASSERT(chopprefix
> drrb
->drr_toname
);
2636 ASSERT(chopprefix
<= drrb
->drr_toname
+ strlen(drrb
->drr_toname
));
2637 ASSERT(chopprefix
[0] == '/' || chopprefix
[0] == '@' ||
2638 chopprefix
[0] == '\0');
2641 * Determine name of destination snapshot, store in zc_value.
2643 (void) strcpy(zc
.zc_value
, tosnap
);
2644 (void) strncat(zc
.zc_value
, chopprefix
, sizeof (zc
.zc_value
));
2646 if (!zfs_name_valid(zc
.zc_value
, ZFS_TYPE_SNAPSHOT
)) {
2647 zcmd_free_nvlists(&zc
);
2648 return (zfs_error(hdl
, EZFS_INVALIDNAME
, errbuf
));
2652 * Determine the name of the origin snapshot, store in zc_string.
2654 if (drrb
->drr_flags
& DRR_FLAG_CLONE
) {
2655 if (guid_to_name(hdl
, zc
.zc_value
,
2656 drrb
->drr_fromguid
, zc
.zc_string
) != 0) {
2657 zcmd_free_nvlists(&zc
);
2658 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2659 "local origin for clone %s does not exist"),
2661 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
2664 (void) printf("found clone origin %s\n", zc
.zc_string
);
2667 stream_wantsnewfs
= (drrb
->drr_fromguid
== NULL
||
2668 (drrb
->drr_flags
& DRR_FLAG_CLONE
));
2670 if (stream_wantsnewfs
) {
2672 * if the parent fs does not exist, look for it based on
2673 * the parent snap GUID
2675 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2676 "cannot receive new filesystem stream"));
2678 (void) strcpy(zc
.zc_name
, zc
.zc_value
);
2679 cp
= strrchr(zc
.zc_name
, '/');
2683 !zfs_dataset_exists(hdl
, zc
.zc_name
, ZFS_TYPE_DATASET
)) {
2684 char suffix
[ZFS_MAXNAMELEN
];
2685 (void) strcpy(suffix
, strrchr(zc
.zc_value
, '/'));
2686 if (guid_to_name(hdl
, zc
.zc_name
, parent_snapguid
,
2687 zc
.zc_value
) == 0) {
2688 *strchr(zc
.zc_value
, '@') = '\0';
2689 (void) strcat(zc
.zc_value
, suffix
);
2694 * if the fs does not exist, look for it based on the
2697 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
2698 "cannot receive incremental stream"));
2700 (void) strcpy(zc
.zc_name
, zc
.zc_value
);
2701 *strchr(zc
.zc_name
, '@') = '\0';
2704 * If the exact receive path was specified and this is the
2705 * topmost path in the stream, then if the fs does not exist we
2706 * should look no further.
2708 if ((flags
->isprefix
|| (*(chopprefix
= drrb
->drr_toname
+
2709 strlen(sendfs
)) != '\0' && *chopprefix
!= '@')) &&
2710 !zfs_dataset_exists(hdl
, zc
.zc_name
, ZFS_TYPE_DATASET
)) {
2711 char snap
[ZFS_MAXNAMELEN
];
2712 (void) strcpy(snap
, strchr(zc
.zc_value
, '@'));
2713 if (guid_to_name(hdl
, zc
.zc_name
, drrb
->drr_fromguid
,
2714 zc
.zc_value
) == 0) {
2715 *strchr(zc
.zc_value
, '@') = '\0';
2716 (void) strcat(zc
.zc_value
, snap
);
2721 (void) strcpy(zc
.zc_name
, zc
.zc_value
);
2722 *strchr(zc
.zc_name
, '@') = '\0';
2724 if (zfs_dataset_exists(hdl
, zc
.zc_name
, ZFS_TYPE_DATASET
)) {
2728 * Destination fs exists. Therefore this should either
2729 * be an incremental, or the stream specifies a new fs
2730 * (full stream or clone) and they want us to blow it
2731 * away (and have therefore specified -F and removed any
2734 if (stream_wantsnewfs
) {
2735 if (!flags
->force
) {
2736 zcmd_free_nvlists(&zc
);
2737 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2738 "destination '%s' exists\n"
2739 "must specify -F to overwrite it"),
2741 return (zfs_error(hdl
, EZFS_EXISTS
, errbuf
));
2743 if (ioctl(hdl
->libzfs_fd
, ZFS_IOC_SNAPSHOT_LIST_NEXT
,
2745 zcmd_free_nvlists(&zc
);
2746 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2747 "destination has snapshots (eg. %s)\n"
2748 "must destroy them to overwrite it"),
2750 return (zfs_error(hdl
, EZFS_EXISTS
, errbuf
));
2754 if ((zhp
= zfs_open(hdl
, zc
.zc_name
,
2755 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
)) == NULL
) {
2756 zcmd_free_nvlists(&zc
);
2760 if (stream_wantsnewfs
&&
2761 zhp
->zfs_dmustats
.dds_origin
[0]) {
2762 zcmd_free_nvlists(&zc
);
2764 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2765 "destination '%s' is a clone\n"
2766 "must destroy it to overwrite it"),
2768 return (zfs_error(hdl
, EZFS_EXISTS
, errbuf
));
2771 if (!flags
->dryrun
&& zhp
->zfs_type
== ZFS_TYPE_FILESYSTEM
&&
2772 stream_wantsnewfs
) {
2773 /* We can't do online recv in this case */
2774 clp
= changelist_gather(zhp
, ZFS_PROP_NAME
, 0, 0);
2777 zcmd_free_nvlists(&zc
);
2780 if (changelist_prefix(clp
) != 0) {
2781 changelist_free(clp
);
2783 zcmd_free_nvlists(&zc
);
2790 * Destination filesystem does not exist. Therefore we better
2791 * be creating a new filesystem (either from a full backup, or
2792 * a clone). It would therefore be invalid if the user
2793 * specified only the pool name (i.e. if the destination name
2794 * contained no slash character).
2796 if (!stream_wantsnewfs
||
2797 (cp
= strrchr(zc
.zc_name
, '/')) == NULL
) {
2798 zcmd_free_nvlists(&zc
);
2799 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2800 "destination '%s' does not exist"), zc
.zc_name
);
2801 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
2805 * Trim off the final dataset component so we perform the
2806 * recvbackup ioctl to the filesystems's parent.
2810 if (flags
->isprefix
&& !flags
->istail
&& !flags
->dryrun
&&
2811 create_parents(hdl
, zc
.zc_value
, strlen(tosnap
)) != 0) {
2812 zcmd_free_nvlists(&zc
);
2813 return (zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
));
2819 zc
.zc_begin_record
= drr_noswap
->drr_u
.drr_begin
;
2820 zc
.zc_cookie
= infd
;
2821 zc
.zc_guid
= flags
->force
;
2822 if (flags
->verbose
) {
2823 (void) printf("%s %s stream of %s into %s\n",
2824 flags
->dryrun
? "would receive" : "receiving",
2825 drrb
->drr_fromguid
? "incremental" : "full",
2826 drrb
->drr_toname
, zc
.zc_value
);
2827 (void) fflush(stdout
);
2830 if (flags
->dryrun
) {
2831 zcmd_free_nvlists(&zc
);
2832 return (recv_skip(hdl
, infd
, flags
->byteswap
));
2835 zc
.zc_nvlist_dst
= (uint64_t)(uintptr_t)prop_errbuf
;
2836 zc
.zc_nvlist_dst_size
= sizeof (prop_errbuf
);
2837 zc
.zc_cleanup_fd
= cleanup_fd
;
2838 zc
.zc_action_handle
= *action_handlep
;
2840 err
= ioctl_err
= zfs_ioctl(hdl
, ZFS_IOC_RECV
, &zc
);
2841 ioctl_errno
= errno
;
2842 prop_errflags
= (zprop_errflags_t
)zc
.zc_obj
;
2845 nvlist_t
*prop_errors
;
2846 VERIFY(0 == nvlist_unpack((void *)(uintptr_t)zc
.zc_nvlist_dst
,
2847 zc
.zc_nvlist_dst_size
, &prop_errors
, 0));
2849 nvpair_t
*prop_err
= NULL
;
2851 while ((prop_err
= nvlist_next_nvpair(prop_errors
,
2852 prop_err
)) != NULL
) {
2857 prop
= zfs_name_to_prop(nvpair_name(prop_err
));
2858 (void) nvpair_value_int32(prop_err
, &intval
);
2859 if (strcmp(nvpair_name(prop_err
),
2860 ZPROP_N_MORE_ERRORS
) == 0) {
2861 trunc_prop_errs(intval
);
2864 (void) snprintf(tbuf
, sizeof (tbuf
),
2865 dgettext(TEXT_DOMAIN
,
2866 "cannot receive %s property on %s"),
2867 nvpair_name(prop_err
), zc
.zc_name
);
2868 zfs_setprop_error(hdl
, prop
, intval
, tbuf
);
2871 nvlist_free(prop_errors
);
2874 zc
.zc_nvlist_dst
= 0;
2875 zc
.zc_nvlist_dst_size
= 0;
2876 zcmd_free_nvlists(&zc
);
2878 if (err
== 0 && snapprops_nvlist
) {
2879 zfs_cmd_t zc2
= { 0 };
2881 (void) strcpy(zc2
.zc_name
, zc
.zc_value
);
2882 zc2
.zc_cookie
= B_TRUE
; /* received */
2883 if (zcmd_write_src_nvlist(hdl
, &zc2
, snapprops_nvlist
) == 0) {
2884 (void) zfs_ioctl(hdl
, ZFS_IOC_SET_PROP
, &zc2
);
2885 zcmd_free_nvlists(&zc2
);
2889 if (err
&& (ioctl_errno
== ENOENT
|| ioctl_errno
== EEXIST
)) {
2891 * It may be that this snapshot already exists,
2892 * in which case we want to consume & ignore it
2893 * rather than failing.
2895 avl_tree_t
*local_avl
;
2896 nvlist_t
*local_nv
, *fs
;
2897 cp
= strchr(zc
.zc_value
, '@');
2900 * XXX Do this faster by just iterating over snaps in
2901 * this fs. Also if zc_value does not exist, we will
2902 * get a strange "does not exist" error message.
2905 if (gather_nvlist(hdl
, zc
.zc_value
, NULL
, NULL
, B_FALSE
,
2906 &local_nv
, &local_avl
) == 0) {
2908 fs
= fsavl_find(local_avl
, drrb
->drr_toguid
, NULL
);
2909 fsavl_destroy(local_avl
);
2910 nvlist_free(local_nv
);
2913 if (flags
->verbose
) {
2914 (void) printf("snap %s already exists; "
2915 "ignoring\n", zc
.zc_value
);
2917 err
= ioctl_err
= recv_skip(hdl
, infd
,
2924 if (ioctl_err
!= 0) {
2925 switch (ioctl_errno
) {
2927 cp
= strchr(zc
.zc_value
, '@');
2929 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2930 "most recent snapshot of %s does not\n"
2931 "match incremental source"), zc
.zc_value
);
2932 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
2936 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2937 "destination %s has been modified\n"
2938 "since most recent snapshot"), zc
.zc_name
);
2939 (void) zfs_error(hdl
, EZFS_BADRESTORE
, errbuf
);
2942 cp
= strchr(zc
.zc_value
, '@');
2944 /* it's the containing fs that exists */
2947 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2948 "destination already exists"));
2949 (void) zfs_error_fmt(hdl
, EZFS_EXISTS
,
2950 dgettext(TEXT_DOMAIN
, "cannot restore to %s"),
2955 (void) zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2958 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2959 "invalid stream (checksum mismatch)"));
2960 (void) zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
);
2963 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2964 "pool must be upgraded to receive this stream."));
2965 (void) zfs_error(hdl
, EZFS_BADVERSION
, errbuf
);
2968 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
2969 "destination %s space quota exceeded"), zc
.zc_name
);
2970 (void) zfs_error(hdl
, EZFS_NOSPC
, errbuf
);
2973 (void) zfs_standard_error(hdl
, ioctl_errno
, errbuf
);
2978 * Mount the target filesystem (if created). Also mount any
2979 * children of the target filesystem if we did a replication
2980 * receive (indicated by stream_avl being non-NULL).
2982 cp
= strchr(zc
.zc_value
, '@');
2983 if (cp
&& (ioctl_err
== 0 || !newfs
)) {
2987 h
= zfs_open(hdl
, zc
.zc_value
,
2988 ZFS_TYPE_FILESYSTEM
| ZFS_TYPE_VOLUME
);
2990 if (h
->zfs_type
== ZFS_TYPE_VOLUME
) {
2992 } else if (newfs
|| stream_avl
) {
2994 * Track the first/top of hierarchy fs,
2995 * for mounting and sharing later.
2997 if (top_zfs
&& *top_zfs
== NULL
)
2998 *top_zfs
= zfs_strdup(hdl
, zc
.zc_value
);
3006 err
|= changelist_postfix(clp
);
3007 changelist_free(clp
);
3010 if (prop_errflags
& ZPROP_ERR_NOCLEAR
) {
3011 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
, "Warning: "
3012 "failed to clear unreceived properties on %s"),
3014 (void) fprintf(stderr
, "\n");
3016 if (prop_errflags
& ZPROP_ERR_NORESTORE
) {
3017 (void) fprintf(stderr
, dgettext(TEXT_DOMAIN
, "Warning: "
3018 "failed to restore original properties on %s"),
3020 (void) fprintf(stderr
, "\n");
3023 if (err
|| ioctl_err
)
3026 *action_handlep
= zc
.zc_action_handle
;
3028 if (flags
->verbose
) {
3031 uint64_t bytes
= zc
.zc_cookie
;
3032 time_t delta
= time(NULL
) - begin_time
;
3035 zfs_nicenum(bytes
, buf1
, sizeof (buf1
));
3036 zfs_nicenum(bytes
/delta
, buf2
, sizeof (buf1
));
3038 (void) printf("received %sB stream in %lu seconds (%sB/sec)\n",
3046 zfs_receive_impl(libzfs_handle_t
*hdl
, const char *tosnap
, recvflags_t
*flags
,
3047 int infd
, const char *sendfs
, nvlist_t
*stream_nv
, avl_tree_t
*stream_avl
,
3048 char **top_zfs
, int cleanup_fd
, uint64_t *action_handlep
)
3051 dmu_replay_record_t drr
, drr_noswap
;
3052 struct drr_begin
*drrb
= &drr
.drr_u
.drr_begin
;
3054 zio_cksum_t zcksum
= { 0 };
3055 uint64_t featureflags
;
3058 (void) snprintf(errbuf
, sizeof (errbuf
), dgettext(TEXT_DOMAIN
,
3061 if (flags
->isprefix
&&
3062 !zfs_dataset_exists(hdl
, tosnap
, ZFS_TYPE_DATASET
)) {
3063 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "specified fs "
3064 "(%s) does not exist"), tosnap
);
3065 return (zfs_error(hdl
, EZFS_NOENT
, errbuf
));
3068 /* read in the BEGIN record */
3069 if (0 != (err
= recv_read(hdl
, infd
, &drr
, sizeof (drr
), B_FALSE
,
3073 if (drr
.drr_type
== DRR_END
|| drr
.drr_type
== BSWAP_32(DRR_END
)) {
3074 /* It's the double end record at the end of a package */
3078 /* the kernel needs the non-byteswapped begin record */
3081 flags
->byteswap
= B_FALSE
;
3082 if (drrb
->drr_magic
== BSWAP_64(DMU_BACKUP_MAGIC
)) {
3084 * We computed the checksum in the wrong byteorder in
3085 * recv_read() above; do it again correctly.
3087 bzero(&zcksum
, sizeof (zio_cksum_t
));
3088 fletcher_4_incremental_byteswap(&drr
, sizeof (drr
), &zcksum
);
3089 flags
->byteswap
= B_TRUE
;
3091 drr
.drr_type
= BSWAP_32(drr
.drr_type
);
3092 drr
.drr_payloadlen
= BSWAP_32(drr
.drr_payloadlen
);
3093 drrb
->drr_magic
= BSWAP_64(drrb
->drr_magic
);
3094 drrb
->drr_versioninfo
= BSWAP_64(drrb
->drr_versioninfo
);
3095 drrb
->drr_creation_time
= BSWAP_64(drrb
->drr_creation_time
);
3096 drrb
->drr_type
= BSWAP_32(drrb
->drr_type
);
3097 drrb
->drr_flags
= BSWAP_32(drrb
->drr_flags
);
3098 drrb
->drr_toguid
= BSWAP_64(drrb
->drr_toguid
);
3099 drrb
->drr_fromguid
= BSWAP_64(drrb
->drr_fromguid
);
3102 if (drrb
->drr_magic
!= DMU_BACKUP_MAGIC
|| drr
.drr_type
!= DRR_BEGIN
) {
3103 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
3104 "stream (bad magic number)"));
3105 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
3108 featureflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
3109 hdrtype
= DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
);
3111 if (!DMU_STREAM_SUPPORTED(featureflags
) ||
3112 (hdrtype
!= DMU_SUBSTREAM
&& hdrtype
!= DMU_COMPOUNDSTREAM
)) {
3113 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
,
3114 "stream has unsupported feature, feature flags = %lx"),
3116 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
3119 if (strchr(drrb
->drr_toname
, '@') == NULL
) {
3120 zfs_error_aux(hdl
, dgettext(TEXT_DOMAIN
, "invalid "
3121 "stream (bad snapshot name)"));
3122 return (zfs_error(hdl
, EZFS_BADSTREAM
, errbuf
));
3125 if (DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) == DMU_SUBSTREAM
) {
3126 char nonpackage_sendfs
[ZFS_MAXNAMELEN
];
3127 if (sendfs
== NULL
) {
3129 * We were not called from zfs_receive_package(). Get
3130 * the fs specified by 'zfs send'.
3133 (void) strlcpy(nonpackage_sendfs
,
3134 drr
.drr_u
.drr_begin
.drr_toname
, ZFS_MAXNAMELEN
);
3135 if ((cp
= strchr(nonpackage_sendfs
, '@')) != NULL
)
3137 sendfs
= nonpackage_sendfs
;
3139 return (zfs_receive_one(hdl
, infd
, tosnap
, flags
,
3140 &drr
, &drr_noswap
, sendfs
, stream_nv
, stream_avl
,
3141 top_zfs
, cleanup_fd
, action_handlep
));
3143 assert(DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) ==
3144 DMU_COMPOUNDSTREAM
);
3145 return (zfs_receive_package(hdl
, infd
, tosnap
, flags
,
3146 &drr
, &zcksum
, top_zfs
, cleanup_fd
, action_handlep
));
3151 * Restores a backup of tosnap from the file descriptor specified by infd.
3152 * Return 0 on total success, -2 if some things couldn't be
3153 * destroyed/renamed/promoted, -1 if some things couldn't be received.
3154 * (-1 will override -2).
3157 zfs_receive(libzfs_handle_t
*hdl
, const char *tosnap
, recvflags_t
*flags
,
3158 int infd
, avl_tree_t
*stream_avl
)
3160 char *top_zfs
= NULL
;
3163 uint64_t action_handle
= 0;
3165 cleanup_fd
= open(ZFS_DEV
, O_RDWR
|O_EXCL
);
3166 VERIFY(cleanup_fd
>= 0);
3168 err
= zfs_receive_impl(hdl
, tosnap
, flags
, infd
, NULL
, NULL
,
3169 stream_avl
, &top_zfs
, cleanup_fd
, &action_handle
);
3171 VERIFY(0 == close(cleanup_fd
));
3173 if (err
== 0 && !flags
->nomount
&& top_zfs
) {
3175 prop_changelist_t
*clp
;
3177 zhp
= zfs_open(hdl
, top_zfs
, ZFS_TYPE_FILESYSTEM
);
3179 clp
= changelist_gather(zhp
, ZFS_PROP_MOUNTPOINT
,
3180 CL_GATHER_MOUNT_ALWAYS
, 0);
3183 /* mount and share received datasets */
3184 err
= changelist_postfix(clp
);
3185 changelist_free(clp
);
3188 if (zhp
== NULL
|| clp
== NULL
|| err
)