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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
30 #include <sys/dmu_impl.h>
31 #include <sys/dmu_tx.h>
33 #include <sys/dnode.h>
34 #include <sys/zfs_context.h>
35 #include <sys/dmu_objset.h>
36 #include <sys/dmu_traverse.h>
37 #include <sys/dsl_dataset.h>
38 #include <sys/dsl_dir.h>
39 #include <sys/dsl_prop.h>
40 #include <sys/dsl_pool.h>
41 #include <sys/dsl_synctask.h>
42 #include <sys/spa_impl.h>
43 #include <sys/zfs_ioctl.h>
45 #include <sys/zio_checksum.h>
46 #include <sys/zfs_znode.h>
47 #include <zfs_fletcher.h>
50 #include <sys/zfs_onexit.h>
51 #include <sys/dmu_send.h>
52 #include <sys/dsl_destroy.h>
53 #include <sys/blkptr.h>
54 #include <sys/dsl_bookmark.h>
55 #include <sys/zfeature.h>
57 /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
58 int zfs_send_corrupt_data
= B_FALSE
;
60 static char *dmu_recv_tag
= "dmu_recv_tag";
61 static const char *recv_clone_name
= "%recv";
63 typedef struct dump_bytes_io
{
64 dmu_sendarg_t
*dbi_dsp
;
70 dump_bytes_strategy(void *arg
)
72 dump_bytes_io_t
*dbi
= (dump_bytes_io_t
*)arg
;
73 dmu_sendarg_t
*dsp
= dbi
->dbi_dsp
;
74 dsl_dataset_t
*ds
= dsp
->dsa_os
->os_dsl_dataset
;
75 ssize_t resid
; /* have to get resid to get detailed errno */
76 ASSERT0(dbi
->dbi_len
% 8);
78 fletcher_4_incremental_native(dbi
->dbi_buf
, dbi
->dbi_len
, &dsp
->dsa_zc
);
79 dsp
->dsa_err
= vn_rdwr(UIO_WRITE
, dsp
->dsa_vp
,
80 (caddr_t
)dbi
->dbi_buf
, dbi
->dbi_len
,
81 0, UIO_SYSSPACE
, FAPPEND
, RLIM64_INFINITY
, CRED(), &resid
);
83 mutex_enter(&ds
->ds_sendstream_lock
);
84 *dsp
->dsa_off
+= dbi
->dbi_len
;
85 mutex_exit(&ds
->ds_sendstream_lock
);
89 dump_bytes(dmu_sendarg_t
*dsp
, void *buf
, int len
)
98 * The vn_rdwr() call is performed in a taskq to ensure that there is
99 * always enough stack space to write safely to the target filesystem.
100 * The ZIO_TYPE_FREE threads are used because there can be a lot of
101 * them and they are used in vdev_file.c for a similar purpose.
103 spa_taskq_dispatch_sync(dmu_objset_spa(dsp
->dsa_os
), ZIO_TYPE_FREE
,
104 ZIO_TASKQ_ISSUE
, dump_bytes_strategy
, &dbi
, TQ_SLEEP
);
106 return (dsp
->dsa_err
);
110 dump_free(dmu_sendarg_t
*dsp
, uint64_t object
, uint64_t offset
,
113 struct drr_free
*drrf
= &(dsp
->dsa_drr
->drr_u
.drr_free
);
116 * When we receive a free record, dbuf_free_range() assumes
117 * that the receiving system doesn't have any dbufs in the range
118 * being freed. This is always true because there is a one-record
119 * constraint: we only send one WRITE record for any given
120 * object+offset. We know that the one-record constraint is
121 * true because we always send data in increasing order by
124 * If the increasing-order constraint ever changes, we should find
125 * another way to assert that the one-record constraint is still
128 ASSERT(object
> dsp
->dsa_last_data_object
||
129 (object
== dsp
->dsa_last_data_object
&&
130 offset
> dsp
->dsa_last_data_offset
));
133 * If we are doing a non-incremental send, then there can't
134 * be any data in the dataset we're receiving into. Therefore
135 * a free record would simply be a no-op. Save space by not
136 * sending it to begin with.
138 if (!dsp
->dsa_incremental
)
141 if (length
!= -1ULL && offset
+ length
< offset
)
145 * If there is a pending op, but it's not PENDING_FREE, push it out,
146 * since free block aggregation can only be done for blocks of the
147 * same type (i.e., DRR_FREE records can only be aggregated with
148 * other DRR_FREE records. DRR_FREEOBJECTS records can only be
149 * aggregated with other DRR_FREEOBJECTS records.
151 if (dsp
->dsa_pending_op
!= PENDING_NONE
&&
152 dsp
->dsa_pending_op
!= PENDING_FREE
) {
153 if (dump_bytes(dsp
, dsp
->dsa_drr
,
154 sizeof (dmu_replay_record_t
)) != 0)
155 return (SET_ERROR(EINTR
));
156 dsp
->dsa_pending_op
= PENDING_NONE
;
159 if (dsp
->dsa_pending_op
== PENDING_FREE
) {
161 * There should never be a PENDING_FREE if length is -1
162 * (because dump_dnode is the only place where this
163 * function is called with a -1, and only after flushing
164 * any pending record).
166 ASSERT(length
!= -1ULL);
168 * Check to see whether this free block can be aggregated
171 if (drrf
->drr_object
== object
&& drrf
->drr_offset
+
172 drrf
->drr_length
== offset
) {
173 drrf
->drr_length
+= length
;
176 /* not a continuation. Push out pending record */
177 if (dump_bytes(dsp
, dsp
->dsa_drr
,
178 sizeof (dmu_replay_record_t
)) != 0)
179 return (SET_ERROR(EINTR
));
180 dsp
->dsa_pending_op
= PENDING_NONE
;
183 /* create a FREE record and make it pending */
184 bzero(dsp
->dsa_drr
, sizeof (dmu_replay_record_t
));
185 dsp
->dsa_drr
->drr_type
= DRR_FREE
;
186 drrf
->drr_object
= object
;
187 drrf
->drr_offset
= offset
;
188 drrf
->drr_length
= length
;
189 drrf
->drr_toguid
= dsp
->dsa_toguid
;
190 if (length
== -1ULL) {
191 if (dump_bytes(dsp
, dsp
->dsa_drr
,
192 sizeof (dmu_replay_record_t
)) != 0)
193 return (SET_ERROR(EINTR
));
195 dsp
->dsa_pending_op
= PENDING_FREE
;
202 dump_write(dmu_sendarg_t
*dsp
, dmu_object_type_t type
,
203 uint64_t object
, uint64_t offset
, int blksz
, const blkptr_t
*bp
, void *data
)
205 struct drr_write
*drrw
= &(dsp
->dsa_drr
->drr_u
.drr_write
);
208 * We send data in increasing object, offset order.
209 * See comment in dump_free() for details.
211 ASSERT(object
> dsp
->dsa_last_data_object
||
212 (object
== dsp
->dsa_last_data_object
&&
213 offset
> dsp
->dsa_last_data_offset
));
214 dsp
->dsa_last_data_object
= object
;
215 dsp
->dsa_last_data_offset
= offset
+ blksz
- 1;
218 * If there is any kind of pending aggregation (currently either
219 * a grouping of free objects or free blocks), push it out to
220 * the stream, since aggregation can't be done across operations
221 * of different types.
223 if (dsp
->dsa_pending_op
!= PENDING_NONE
) {
224 if (dump_bytes(dsp
, dsp
->dsa_drr
,
225 sizeof (dmu_replay_record_t
)) != 0)
226 return (SET_ERROR(EINTR
));
227 dsp
->dsa_pending_op
= PENDING_NONE
;
229 /* write a DATA record */
230 bzero(dsp
->dsa_drr
, sizeof (dmu_replay_record_t
));
231 dsp
->dsa_drr
->drr_type
= DRR_WRITE
;
232 drrw
->drr_object
= object
;
233 drrw
->drr_type
= type
;
234 drrw
->drr_offset
= offset
;
235 drrw
->drr_length
= blksz
;
236 drrw
->drr_toguid
= dsp
->dsa_toguid
;
237 if (BP_IS_EMBEDDED(bp
)) {
239 * There's no pre-computed checksum of embedded BP's, so
240 * (like fletcher4-checkummed blocks) userland will have
241 * to compute a dedup-capable checksum itself.
243 drrw
->drr_checksumtype
= ZIO_CHECKSUM_OFF
;
245 drrw
->drr_checksumtype
= BP_GET_CHECKSUM(bp
);
246 if (zio_checksum_table
[drrw
->drr_checksumtype
].ci_dedup
)
247 drrw
->drr_checksumflags
|= DRR_CHECKSUM_DEDUP
;
248 DDK_SET_LSIZE(&drrw
->drr_key
, BP_GET_LSIZE(bp
));
249 DDK_SET_PSIZE(&drrw
->drr_key
, BP_GET_PSIZE(bp
));
250 DDK_SET_COMPRESS(&drrw
->drr_key
, BP_GET_COMPRESS(bp
));
251 drrw
->drr_key
.ddk_cksum
= bp
->blk_cksum
;
254 if (dump_bytes(dsp
, dsp
->dsa_drr
, sizeof (dmu_replay_record_t
)) != 0)
255 return (SET_ERROR(EINTR
));
256 if (dump_bytes(dsp
, data
, blksz
) != 0)
257 return (SET_ERROR(EINTR
));
262 dump_write_embedded(dmu_sendarg_t
*dsp
, uint64_t object
, uint64_t offset
,
263 int blksz
, const blkptr_t
*bp
)
265 char buf
[BPE_PAYLOAD_SIZE
];
266 struct drr_write_embedded
*drrw
=
267 &(dsp
->dsa_drr
->drr_u
.drr_write_embedded
);
269 if (dsp
->dsa_pending_op
!= PENDING_NONE
) {
270 if (dump_bytes(dsp
, dsp
->dsa_drr
,
271 sizeof (dmu_replay_record_t
)) != 0)
273 dsp
->dsa_pending_op
= PENDING_NONE
;
276 ASSERT(BP_IS_EMBEDDED(bp
));
278 bzero(dsp
->dsa_drr
, sizeof (dmu_replay_record_t
));
279 dsp
->dsa_drr
->drr_type
= DRR_WRITE_EMBEDDED
;
280 drrw
->drr_object
= object
;
281 drrw
->drr_offset
= offset
;
282 drrw
->drr_length
= blksz
;
283 drrw
->drr_toguid
= dsp
->dsa_toguid
;
284 drrw
->drr_compression
= BP_GET_COMPRESS(bp
);
285 drrw
->drr_etype
= BPE_GET_ETYPE(bp
);
286 drrw
->drr_lsize
= BPE_GET_LSIZE(bp
);
287 drrw
->drr_psize
= BPE_GET_PSIZE(bp
);
289 decode_embedded_bp_compressed(bp
, buf
);
291 if (dump_bytes(dsp
, dsp
->dsa_drr
, sizeof (dmu_replay_record_t
)) != 0)
293 if (dump_bytes(dsp
, buf
, P2ROUNDUP(drrw
->drr_psize
, 8)) != 0)
299 dump_spill(dmu_sendarg_t
*dsp
, uint64_t object
, int blksz
, void *data
)
301 struct drr_spill
*drrs
= &(dsp
->dsa_drr
->drr_u
.drr_spill
);
303 if (dsp
->dsa_pending_op
!= PENDING_NONE
) {
304 if (dump_bytes(dsp
, dsp
->dsa_drr
,
305 sizeof (dmu_replay_record_t
)) != 0)
306 return (SET_ERROR(EINTR
));
307 dsp
->dsa_pending_op
= PENDING_NONE
;
310 /* write a SPILL record */
311 bzero(dsp
->dsa_drr
, sizeof (dmu_replay_record_t
));
312 dsp
->dsa_drr
->drr_type
= DRR_SPILL
;
313 drrs
->drr_object
= object
;
314 drrs
->drr_length
= blksz
;
315 drrs
->drr_toguid
= dsp
->dsa_toguid
;
317 if (dump_bytes(dsp
, dsp
->dsa_drr
, sizeof (dmu_replay_record_t
)))
318 return (SET_ERROR(EINTR
));
319 if (dump_bytes(dsp
, data
, blksz
))
320 return (SET_ERROR(EINTR
));
325 dump_freeobjects(dmu_sendarg_t
*dsp
, uint64_t firstobj
, uint64_t numobjs
)
327 struct drr_freeobjects
*drrfo
= &(dsp
->dsa_drr
->drr_u
.drr_freeobjects
);
329 /* See comment in dump_free(). */
330 if (!dsp
->dsa_incremental
)
334 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
335 * push it out, since free block aggregation can only be done for
336 * blocks of the same type (i.e., DRR_FREE records can only be
337 * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
338 * can only be aggregated with other DRR_FREEOBJECTS records.
340 if (dsp
->dsa_pending_op
!= PENDING_NONE
&&
341 dsp
->dsa_pending_op
!= PENDING_FREEOBJECTS
) {
342 if (dump_bytes(dsp
, dsp
->dsa_drr
,
343 sizeof (dmu_replay_record_t
)) != 0)
344 return (SET_ERROR(EINTR
));
345 dsp
->dsa_pending_op
= PENDING_NONE
;
347 if (dsp
->dsa_pending_op
== PENDING_FREEOBJECTS
) {
349 * See whether this free object array can be aggregated
352 if (drrfo
->drr_firstobj
+ drrfo
->drr_numobjs
== firstobj
) {
353 drrfo
->drr_numobjs
+= numobjs
;
356 /* can't be aggregated. Push out pending record */
357 if (dump_bytes(dsp
, dsp
->dsa_drr
,
358 sizeof (dmu_replay_record_t
)) != 0)
359 return (SET_ERROR(EINTR
));
360 dsp
->dsa_pending_op
= PENDING_NONE
;
364 /* write a FREEOBJECTS record */
365 bzero(dsp
->dsa_drr
, sizeof (dmu_replay_record_t
));
366 dsp
->dsa_drr
->drr_type
= DRR_FREEOBJECTS
;
367 drrfo
->drr_firstobj
= firstobj
;
368 drrfo
->drr_numobjs
= numobjs
;
369 drrfo
->drr_toguid
= dsp
->dsa_toguid
;
371 dsp
->dsa_pending_op
= PENDING_FREEOBJECTS
;
377 dump_dnode(dmu_sendarg_t
*dsp
, uint64_t object
, dnode_phys_t
*dnp
)
379 struct drr_object
*drro
= &(dsp
->dsa_drr
->drr_u
.drr_object
);
381 if (dnp
== NULL
|| dnp
->dn_type
== DMU_OT_NONE
)
382 return (dump_freeobjects(dsp
, object
, 1));
384 if (dsp
->dsa_pending_op
!= PENDING_NONE
) {
385 if (dump_bytes(dsp
, dsp
->dsa_drr
,
386 sizeof (dmu_replay_record_t
)) != 0)
387 return (SET_ERROR(EINTR
));
388 dsp
->dsa_pending_op
= PENDING_NONE
;
391 /* write an OBJECT record */
392 bzero(dsp
->dsa_drr
, sizeof (dmu_replay_record_t
));
393 dsp
->dsa_drr
->drr_type
= DRR_OBJECT
;
394 drro
->drr_object
= object
;
395 drro
->drr_type
= dnp
->dn_type
;
396 drro
->drr_bonustype
= dnp
->dn_bonustype
;
397 drro
->drr_blksz
= dnp
->dn_datablkszsec
<< SPA_MINBLOCKSHIFT
;
398 drro
->drr_bonuslen
= dnp
->dn_bonuslen
;
399 drro
->drr_checksumtype
= dnp
->dn_checksum
;
400 drro
->drr_compress
= dnp
->dn_compress
;
401 drro
->drr_toguid
= dsp
->dsa_toguid
;
403 if (dump_bytes(dsp
, dsp
->dsa_drr
, sizeof (dmu_replay_record_t
)) != 0)
404 return (SET_ERROR(EINTR
));
406 if (dump_bytes(dsp
, DN_BONUS(dnp
), P2ROUNDUP(dnp
->dn_bonuslen
, 8)) != 0)
407 return (SET_ERROR(EINTR
));
409 /* Free anything past the end of the file. */
410 if (dump_free(dsp
, object
, (dnp
->dn_maxblkid
+ 1) *
411 (dnp
->dn_datablkszsec
<< SPA_MINBLOCKSHIFT
), -1ULL) != 0)
412 return (SET_ERROR(EINTR
));
413 if (dsp
->dsa_err
!= 0)
414 return (SET_ERROR(EINTR
));
419 backup_do_embed(dmu_sendarg_t
*dsp
, const blkptr_t
*bp
)
421 if (!BP_IS_EMBEDDED(bp
))
425 * Compression function must be legacy, or explicitly enabled.
427 if ((BP_GET_COMPRESS(bp
) >= ZIO_COMPRESS_LEGACY_FUNCTIONS
&&
428 !(dsp
->dsa_featureflags
& DMU_BACKUP_FEATURE_EMBED_DATA_LZ4
)))
432 * Embed type must be explicitly enabled.
434 switch (BPE_GET_ETYPE(bp
)) {
435 case BP_EMBEDDED_TYPE_DATA
:
436 if (dsp
->dsa_featureflags
& DMU_BACKUP_FEATURE_EMBED_DATA
)
445 #define BP_SPAN(dnp, level) \
446 (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
447 (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
451 backup_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
452 const zbookmark_phys_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
454 dmu_sendarg_t
*dsp
= arg
;
455 dmu_object_type_t type
= bp
? BP_GET_TYPE(bp
) : DMU_OT_NONE
;
458 if (issig(JUSTLOOKING
) && issig(FORREAL
))
459 return (SET_ERROR(EINTR
));
461 if (zb
->zb_object
!= DMU_META_DNODE_OBJECT
&&
462 DMU_OBJECT_IS_SPECIAL(zb
->zb_object
)) {
464 } else if (zb
->zb_level
== ZB_ZIL_LEVEL
) {
466 * If we are sending a non-snapshot (which is allowed on
467 * read-only pools), it may have a ZIL, which must be ignored.
470 } else if (BP_IS_HOLE(bp
) &&
471 zb
->zb_object
== DMU_META_DNODE_OBJECT
) {
472 uint64_t span
= BP_SPAN(dnp
, zb
->zb_level
);
473 uint64_t dnobj
= (zb
->zb_blkid
* span
) >> DNODE_SHIFT
;
474 err
= dump_freeobjects(dsp
, dnobj
, span
>> DNODE_SHIFT
);
475 } else if (BP_IS_HOLE(bp
)) {
476 uint64_t span
= BP_SPAN(dnp
, zb
->zb_level
);
477 err
= dump_free(dsp
, zb
->zb_object
, zb
->zb_blkid
* span
, span
);
478 } else if (zb
->zb_level
> 0 || type
== DMU_OT_OBJSET
) {
480 } else if (type
== DMU_OT_DNODE
) {
483 int blksz
= BP_GET_LSIZE(bp
);
484 uint32_t aflags
= ARC_WAIT
;
487 if (arc_read(NULL
, spa
, bp
, arc_getbuf_func
, &abuf
,
488 ZIO_PRIORITY_ASYNC_READ
, ZIO_FLAG_CANFAIL
,
490 return (SET_ERROR(EIO
));
493 for (i
= 0; i
< blksz
>> DNODE_SHIFT
; i
++) {
494 uint64_t dnobj
= (zb
->zb_blkid
<<
495 (DNODE_BLOCK_SHIFT
- DNODE_SHIFT
)) + i
;
496 err
= dump_dnode(dsp
, dnobj
, blk
+i
);
500 (void) arc_buf_remove_ref(abuf
, &abuf
);
501 } else if (type
== DMU_OT_SA
) {
502 uint32_t aflags
= ARC_WAIT
;
504 int blksz
= BP_GET_LSIZE(bp
);
506 if (arc_read(NULL
, spa
, bp
, arc_getbuf_func
, &abuf
,
507 ZIO_PRIORITY_ASYNC_READ
, ZIO_FLAG_CANFAIL
,
509 return (SET_ERROR(EIO
));
511 err
= dump_spill(dsp
, zb
->zb_object
, blksz
, abuf
->b_data
);
512 (void) arc_buf_remove_ref(abuf
, &abuf
);
513 } else if (backup_do_embed(dsp
, bp
)) {
514 /* it's an embedded level-0 block of a regular object */
515 int blksz
= dnp
->dn_datablkszsec
<< SPA_MINBLOCKSHIFT
;
516 err
= dump_write_embedded(dsp
, zb
->zb_object
,
517 zb
->zb_blkid
* blksz
, blksz
, bp
);
518 } else { /* it's a level-0 block of a regular object */
519 uint32_t aflags
= ARC_WAIT
;
521 int blksz
= BP_GET_LSIZE(bp
);
523 ASSERT3U(blksz
, ==, dnp
->dn_datablkszsec
<< SPA_MINBLOCKSHIFT
);
524 ASSERT0(zb
->zb_level
);
525 if (arc_read(NULL
, spa
, bp
, arc_getbuf_func
, &abuf
,
526 ZIO_PRIORITY_ASYNC_READ
, ZIO_FLAG_CANFAIL
,
528 if (zfs_send_corrupt_data
) {
530 /* Send a block filled with 0x"zfs badd bloc" */
531 abuf
= arc_buf_alloc(spa
, blksz
, &abuf
,
533 for (ptr
= abuf
->b_data
;
534 (char *)ptr
< (char *)abuf
->b_data
+ blksz
;
536 *ptr
= 0x2f5baddb10cULL
;
538 return (SET_ERROR(EIO
));
542 err
= dump_write(dsp
, type
, zb
->zb_object
, zb
->zb_blkid
* blksz
,
543 blksz
, bp
, abuf
->b_data
);
544 (void) arc_buf_remove_ref(abuf
, &abuf
);
547 ASSERT(err
== 0 || err
== EINTR
);
552 * Releases dp using the specified tag.
555 dmu_send_impl(void *tag
, dsl_pool_t
*dp
, dsl_dataset_t
*ds
,
556 zfs_bookmark_phys_t
*fromzb
, boolean_t is_clone
, boolean_t embedok
,
557 int outfd
, vnode_t
*vp
, offset_t
*off
)
560 dmu_replay_record_t
*drr
;
563 uint64_t fromtxg
= 0;
564 uint64_t featureflags
= 0;
566 err
= dmu_objset_from_ds(ds
, &os
);
568 dsl_pool_rele(dp
, tag
);
572 drr
= kmem_zalloc(sizeof (dmu_replay_record_t
), KM_SLEEP
);
573 drr
->drr_type
= DRR_BEGIN
;
574 drr
->drr_u
.drr_begin
.drr_magic
= DMU_BACKUP_MAGIC
;
575 DMU_SET_STREAM_HDRTYPE(drr
->drr_u
.drr_begin
.drr_versioninfo
,
579 if (dmu_objset_type(os
) == DMU_OST_ZFS
) {
581 if (zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &version
) != 0) {
582 kmem_free(drr
, sizeof (dmu_replay_record_t
));
583 dsl_pool_rele(dp
, tag
);
584 return (SET_ERROR(EINVAL
));
586 if (version
>= ZPL_VERSION_SA
) {
587 featureflags
|= DMU_BACKUP_FEATURE_SA_SPILL
;
593 spa_feature_is_active(dp
->dp_spa
, SPA_FEATURE_EMBEDDED_DATA
)) {
594 featureflags
|= DMU_BACKUP_FEATURE_EMBED_DATA
;
595 if (spa_feature_is_active(dp
->dp_spa
, SPA_FEATURE_LZ4_COMPRESS
))
596 featureflags
|= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4
;
601 DMU_SET_FEATUREFLAGS(drr
->drr_u
.drr_begin
.drr_versioninfo
,
604 drr
->drr_u
.drr_begin
.drr_creation_time
=
605 ds
->ds_phys
->ds_creation_time
;
606 drr
->drr_u
.drr_begin
.drr_type
= dmu_objset_type(os
);
608 drr
->drr_u
.drr_begin
.drr_flags
|= DRR_FLAG_CLONE
;
609 drr
->drr_u
.drr_begin
.drr_toguid
= ds
->ds_phys
->ds_guid
;
610 if (ds
->ds_phys
->ds_flags
& DS_FLAG_CI_DATASET
)
611 drr
->drr_u
.drr_begin
.drr_flags
|= DRR_FLAG_CI_DATA
;
613 if (fromzb
!= NULL
) {
614 drr
->drr_u
.drr_begin
.drr_fromguid
= fromzb
->zbm_guid
;
615 fromtxg
= fromzb
->zbm_creation_txg
;
617 dsl_dataset_name(ds
, drr
->drr_u
.drr_begin
.drr_toname
);
618 if (!dsl_dataset_is_snapshot(ds
)) {
619 (void) strlcat(drr
->drr_u
.drr_begin
.drr_toname
, "@--head--",
620 sizeof (drr
->drr_u
.drr_begin
.drr_toname
));
623 dsp
= kmem_zalloc(sizeof (dmu_sendarg_t
), KM_SLEEP
);
627 dsp
->dsa_outfd
= outfd
;
628 dsp
->dsa_proc
= curproc
;
631 dsp
->dsa_toguid
= ds
->ds_phys
->ds_guid
;
632 ZIO_SET_CHECKSUM(&dsp
->dsa_zc
, 0, 0, 0, 0);
633 dsp
->dsa_pending_op
= PENDING_NONE
;
634 dsp
->dsa_incremental
= (fromzb
!= NULL
);
635 dsp
->dsa_featureflags
= featureflags
;
637 mutex_enter(&ds
->ds_sendstream_lock
);
638 list_insert_head(&ds
->ds_sendstreams
, dsp
);
639 mutex_exit(&ds
->ds_sendstream_lock
);
641 dsl_dataset_long_hold(ds
, FTAG
);
642 dsl_pool_rele(dp
, tag
);
644 if (dump_bytes(dsp
, drr
, sizeof (dmu_replay_record_t
)) != 0) {
649 err
= traverse_dataset(ds
, fromtxg
, TRAVERSE_PRE
| TRAVERSE_PREFETCH
,
652 if (dsp
->dsa_pending_op
!= PENDING_NONE
)
653 if (dump_bytes(dsp
, drr
, sizeof (dmu_replay_record_t
)) != 0)
654 err
= SET_ERROR(EINTR
);
657 if (err
== EINTR
&& dsp
->dsa_err
!= 0)
662 bzero(drr
, sizeof (dmu_replay_record_t
));
663 drr
->drr_type
= DRR_END
;
664 drr
->drr_u
.drr_end
.drr_checksum
= dsp
->dsa_zc
;
665 drr
->drr_u
.drr_end
.drr_toguid
= dsp
->dsa_toguid
;
667 if (dump_bytes(dsp
, drr
, sizeof (dmu_replay_record_t
)) != 0) {
673 mutex_enter(&ds
->ds_sendstream_lock
);
674 list_remove(&ds
->ds_sendstreams
, dsp
);
675 mutex_exit(&ds
->ds_sendstream_lock
);
677 kmem_free(drr
, sizeof (dmu_replay_record_t
));
678 kmem_free(dsp
, sizeof (dmu_sendarg_t
));
680 dsl_dataset_long_rele(ds
, FTAG
);
686 dmu_send_obj(const char *pool
, uint64_t tosnap
, uint64_t fromsnap
,
687 boolean_t embedok
, int outfd
, vnode_t
*vp
, offset_t
*off
)
691 dsl_dataset_t
*fromds
= NULL
;
694 err
= dsl_pool_hold(pool
, FTAG
, &dp
);
698 err
= dsl_dataset_hold_obj(dp
, tosnap
, FTAG
, &ds
);
700 dsl_pool_rele(dp
, FTAG
);
705 zfs_bookmark_phys_t zb
;
708 err
= dsl_dataset_hold_obj(dp
, fromsnap
, FTAG
, &fromds
);
710 dsl_dataset_rele(ds
, FTAG
);
711 dsl_pool_rele(dp
, FTAG
);
714 if (!dsl_dataset_is_before(ds
, fromds
, 0))
715 err
= SET_ERROR(EXDEV
);
716 zb
.zbm_creation_time
= fromds
->ds_phys
->ds_creation_time
;
717 zb
.zbm_creation_txg
= fromds
->ds_phys
->ds_creation_txg
;
718 zb
.zbm_guid
= fromds
->ds_phys
->ds_guid
;
719 is_clone
= (fromds
->ds_dir
!= ds
->ds_dir
);
720 dsl_dataset_rele(fromds
, FTAG
);
721 err
= dmu_send_impl(FTAG
, dp
, ds
, &zb
, is_clone
, embedok
,
724 err
= dmu_send_impl(FTAG
, dp
, ds
, NULL
, B_FALSE
, embedok
,
727 dsl_dataset_rele(ds
, FTAG
);
732 dmu_send(const char *tosnap
, const char *fromsnap
, boolean_t embedok
,
733 int outfd
, vnode_t
*vp
, offset_t
*off
)
738 boolean_t owned
= B_FALSE
;
740 if (fromsnap
!= NULL
&& strpbrk(fromsnap
, "@#") == NULL
)
741 return (SET_ERROR(EINVAL
));
743 err
= dsl_pool_hold(tosnap
, FTAG
, &dp
);
747 if (strchr(tosnap
, '@') == NULL
&& spa_writeable(dp
->dp_spa
)) {
749 * We are sending a filesystem or volume. Ensure
750 * that it doesn't change by owning the dataset.
752 err
= dsl_dataset_own(dp
, tosnap
, FTAG
, &ds
);
755 err
= dsl_dataset_hold(dp
, tosnap
, FTAG
, &ds
);
758 dsl_pool_rele(dp
, FTAG
);
762 if (fromsnap
!= NULL
) {
763 zfs_bookmark_phys_t zb
;
764 boolean_t is_clone
= B_FALSE
;
765 int fsnamelen
= strchr(tosnap
, '@') - tosnap
;
768 * If the fromsnap is in a different filesystem, then
769 * mark the send stream as a clone.
771 if (strncmp(tosnap
, fromsnap
, fsnamelen
) != 0 ||
772 (fromsnap
[fsnamelen
] != '@' &&
773 fromsnap
[fsnamelen
] != '#')) {
777 if (strchr(fromsnap
, '@')) {
778 dsl_dataset_t
*fromds
;
779 err
= dsl_dataset_hold(dp
, fromsnap
, FTAG
, &fromds
);
781 if (!dsl_dataset_is_before(ds
, fromds
, 0))
782 err
= SET_ERROR(EXDEV
);
783 zb
.zbm_creation_time
=
784 fromds
->ds_phys
->ds_creation_time
;
785 zb
.zbm_creation_txg
=
786 fromds
->ds_phys
->ds_creation_txg
;
787 zb
.zbm_guid
= fromds
->ds_phys
->ds_guid
;
788 is_clone
= (ds
->ds_dir
!= fromds
->ds_dir
);
789 dsl_dataset_rele(fromds
, FTAG
);
792 err
= dsl_bookmark_lookup(dp
, fromsnap
, ds
, &zb
);
795 dsl_dataset_rele(ds
, FTAG
);
796 dsl_pool_rele(dp
, FTAG
);
799 err
= dmu_send_impl(FTAG
, dp
, ds
, &zb
, is_clone
, embedok
,
802 err
= dmu_send_impl(FTAG
, dp
, ds
, NULL
, B_FALSE
, embedok
,
806 dsl_dataset_disown(ds
, FTAG
);
808 dsl_dataset_rele(ds
, FTAG
);
813 dmu_send_estimate(dsl_dataset_t
*ds
, dsl_dataset_t
*fromds
, uint64_t *sizep
)
816 uint64_t size
, recordsize
;
817 ASSERTV(dsl_pool_t
*dp
= ds
->ds_dir
->dd_pool
);
819 ASSERT(dsl_pool_config_held(dp
));
821 /* tosnap must be a snapshot */
822 if (!dsl_dataset_is_snapshot(ds
))
823 return (SET_ERROR(EINVAL
));
826 * fromsnap must be an earlier snapshot from the same fs as tosnap,
827 * or the origin's fs.
829 if (fromds
!= NULL
&& !dsl_dataset_is_before(ds
, fromds
, 0))
830 return (SET_ERROR(EXDEV
));
832 /* Get uncompressed size estimate of changed data. */
833 if (fromds
== NULL
) {
834 size
= ds
->ds_phys
->ds_uncompressed_bytes
;
837 err
= dsl_dataset_space_written(fromds
, ds
,
838 &used
, &comp
, &size
);
844 * Assume that space (both on-disk and in-stream) is dominated by
845 * data. We will adjust for indirect blocks and the copies property,
846 * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
850 * Subtract out approximate space used by indirect blocks.
851 * Assume most space is used by data blocks (non-indirect, non-dnode).
852 * Assume all blocks are recordsize. Assume ditto blocks and
853 * internal fragmentation counter out compression.
855 * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
856 * block, which we observe in practice.
858 err
= dsl_prop_get_int_ds(ds
, "recordsize", &recordsize
);
861 size
-= size
/ recordsize
* sizeof (blkptr_t
);
863 /* Add in the space for the record associated with each block. */
864 size
+= size
/ recordsize
* sizeof (dmu_replay_record_t
);
871 typedef struct dmu_recv_begin_arg
{
872 const char *drba_origin
;
873 dmu_recv_cookie_t
*drba_cookie
;
875 uint64_t drba_snapobj
;
876 } dmu_recv_begin_arg_t
;
879 recv_begin_check_existing_impl(dmu_recv_begin_arg_t
*drba
, dsl_dataset_t
*ds
,
884 dsl_pool_t
*dp
= ds
->ds_dir
->dd_pool
;
886 /* temporary clone name must not exist */
887 error
= zap_lookup(dp
->dp_meta_objset
,
888 ds
->ds_dir
->dd_phys
->dd_child_dir_zapobj
, recv_clone_name
,
891 return (error
== 0 ? EBUSY
: error
);
893 /* new snapshot name must not exist */
894 error
= zap_lookup(dp
->dp_meta_objset
,
895 ds
->ds_phys
->ds_snapnames_zapobj
, drba
->drba_cookie
->drc_tosnap
,
898 return (error
== 0 ? EEXIST
: error
);
902 uint64_t obj
= ds
->ds_phys
->ds_prev_snap_obj
;
904 /* Find snapshot in this dir that matches fromguid. */
906 error
= dsl_dataset_hold_obj(dp
, obj
, FTAG
,
909 return (SET_ERROR(ENODEV
));
910 if (snap
->ds_dir
!= ds
->ds_dir
) {
911 dsl_dataset_rele(snap
, FTAG
);
912 return (SET_ERROR(ENODEV
));
914 if (snap
->ds_phys
->ds_guid
== fromguid
)
916 obj
= snap
->ds_phys
->ds_prev_snap_obj
;
917 dsl_dataset_rele(snap
, FTAG
);
920 return (SET_ERROR(ENODEV
));
922 if (drba
->drba_cookie
->drc_force
) {
923 drba
->drba_snapobj
= obj
;
926 * If we are not forcing, there must be no
927 * changes since fromsnap.
929 if (dsl_dataset_modified_since_snap(ds
, snap
)) {
930 dsl_dataset_rele(snap
, FTAG
);
931 return (SET_ERROR(ETXTBSY
));
933 drba
->drba_snapobj
= ds
->ds_prev
->ds_object
;
936 dsl_dataset_rele(snap
, FTAG
);
938 /* if full, most recent snapshot must be $ORIGIN */
939 if (ds
->ds_phys
->ds_prev_snap_txg
>= TXG_INITIAL
)
940 return (SET_ERROR(ENODEV
));
941 drba
->drba_snapobj
= ds
->ds_phys
->ds_prev_snap_obj
;
949 dmu_recv_begin_check(void *arg
, dmu_tx_t
*tx
)
951 dmu_recv_begin_arg_t
*drba
= arg
;
952 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
953 struct drr_begin
*drrb
= drba
->drba_cookie
->drc_drrb
;
954 uint64_t fromguid
= drrb
->drr_fromguid
;
955 int flags
= drrb
->drr_flags
;
957 uint64_t featureflags
= DMU_GET_FEATUREFLAGS(drrb
->drr_versioninfo
);
959 const char *tofs
= drba
->drba_cookie
->drc_tofs
;
961 /* already checked */
962 ASSERT3U(drrb
->drr_magic
, ==, DMU_BACKUP_MAGIC
);
964 if (DMU_GET_STREAM_HDRTYPE(drrb
->drr_versioninfo
) ==
965 DMU_COMPOUNDSTREAM
||
966 drrb
->drr_type
>= DMU_OST_NUMTYPES
||
967 ((flags
& DRR_FLAG_CLONE
) && drba
->drba_origin
== NULL
))
968 return (SET_ERROR(EINVAL
));
970 /* Verify pool version supports SA if SA_SPILL feature set */
971 if ((featureflags
& DMU_BACKUP_FEATURE_SA_SPILL
) &&
972 spa_version(dp
->dp_spa
) < SPA_VERSION_SA
)
973 return (SET_ERROR(ENOTSUP
));
976 * The receiving code doesn't know how to translate a WRITE_EMBEDDED
977 * record to a plan WRITE record, so the pool must have the
978 * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED
979 * records. Same with WRITE_EMBEDDED records that use LZ4 compression.
981 if ((featureflags
& DMU_BACKUP_FEATURE_EMBED_DATA
) &&
982 !spa_feature_is_enabled(dp
->dp_spa
, SPA_FEATURE_EMBEDDED_DATA
))
983 return (SET_ERROR(ENOTSUP
));
984 if ((featureflags
& DMU_BACKUP_FEATURE_EMBED_DATA_LZ4
) &&
985 !spa_feature_is_enabled(dp
->dp_spa
, SPA_FEATURE_LZ4_COMPRESS
))
986 return (SET_ERROR(ENOTSUP
));
988 error
= dsl_dataset_hold(dp
, tofs
, FTAG
, &ds
);
990 /* target fs already exists; recv into temp clone */
992 /* Can't recv a clone into an existing fs */
993 if (flags
& DRR_FLAG_CLONE
) {
994 dsl_dataset_rele(ds
, FTAG
);
995 return (SET_ERROR(EINVAL
));
998 error
= recv_begin_check_existing_impl(drba
, ds
, fromguid
);
999 dsl_dataset_rele(ds
, FTAG
);
1000 } else if (error
== ENOENT
) {
1001 /* target fs does not exist; must be a full backup or clone */
1002 char buf
[MAXNAMELEN
];
1005 * If it's a non-clone incremental, we are missing the
1006 * target fs, so fail the recv.
1008 if (fromguid
!= 0 && !(flags
& DRR_FLAG_CLONE
))
1009 return (SET_ERROR(ENOENT
));
1011 /* Open the parent of tofs */
1012 ASSERT3U(strlen(tofs
), <, MAXNAMELEN
);
1013 (void) strlcpy(buf
, tofs
, strrchr(tofs
, '/') - tofs
+ 1);
1014 error
= dsl_dataset_hold(dp
, buf
, FTAG
, &ds
);
1018 if (drba
->drba_origin
!= NULL
) {
1019 dsl_dataset_t
*origin
;
1020 error
= dsl_dataset_hold(dp
, drba
->drba_origin
,
1023 dsl_dataset_rele(ds
, FTAG
);
1026 if (!dsl_dataset_is_snapshot(origin
)) {
1027 dsl_dataset_rele(origin
, FTAG
);
1028 dsl_dataset_rele(ds
, FTAG
);
1029 return (SET_ERROR(EINVAL
));
1031 if (origin
->ds_phys
->ds_guid
!= fromguid
) {
1032 dsl_dataset_rele(origin
, FTAG
);
1033 dsl_dataset_rele(ds
, FTAG
);
1034 return (SET_ERROR(ENODEV
));
1036 dsl_dataset_rele(origin
, FTAG
);
1038 dsl_dataset_rele(ds
, FTAG
);
1045 dmu_recv_begin_sync(void *arg
, dmu_tx_t
*tx
)
1047 dmu_recv_begin_arg_t
*drba
= arg
;
1048 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
1049 struct drr_begin
*drrb
= drba
->drba_cookie
->drc_drrb
;
1050 const char *tofs
= drba
->drba_cookie
->drc_tofs
;
1051 dsl_dataset_t
*ds
, *newds
;
1056 crflags
= (drrb
->drr_flags
& DRR_FLAG_CI_DATA
) ?
1057 DS_FLAG_CI_DATASET
: 0;
1059 error
= dsl_dataset_hold(dp
, tofs
, FTAG
, &ds
);
1061 /* create temporary clone */
1062 dsl_dataset_t
*snap
= NULL
;
1063 if (drba
->drba_snapobj
!= 0) {
1064 VERIFY0(dsl_dataset_hold_obj(dp
,
1065 drba
->drba_snapobj
, FTAG
, &snap
));
1067 dsobj
= dsl_dataset_create_sync(ds
->ds_dir
, recv_clone_name
,
1068 snap
, crflags
, drba
->drba_cred
, tx
);
1069 dsl_dataset_rele(snap
, FTAG
);
1070 dsl_dataset_rele(ds
, FTAG
);
1074 dsl_dataset_t
*origin
= NULL
;
1076 VERIFY0(dsl_dir_hold(dp
, tofs
, FTAG
, &dd
, &tail
));
1078 if (drba
->drba_origin
!= NULL
) {
1079 VERIFY0(dsl_dataset_hold(dp
, drba
->drba_origin
,
1083 /* Create new dataset. */
1084 dsobj
= dsl_dataset_create_sync(dd
,
1085 strrchr(tofs
, '/') + 1,
1086 origin
, crflags
, drba
->drba_cred
, tx
);
1088 dsl_dataset_rele(origin
, FTAG
);
1089 dsl_dir_rele(dd
, FTAG
);
1090 drba
->drba_cookie
->drc_newfs
= B_TRUE
;
1092 VERIFY0(dsl_dataset_own_obj(dp
, dsobj
, dmu_recv_tag
, &newds
));
1094 dmu_buf_will_dirty(newds
->ds_dbuf
, tx
);
1095 newds
->ds_phys
->ds_flags
|= DS_FLAG_INCONSISTENT
;
1098 * If we actually created a non-clone, we need to create the
1099 * objset in our new dataset.
1101 if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds
))) {
1102 (void) dmu_objset_create_impl(dp
->dp_spa
,
1103 newds
, dsl_dataset_get_blkptr(newds
), drrb
->drr_type
, tx
);
1106 drba
->drba_cookie
->drc_ds
= newds
;
1108 spa_history_log_internal_ds(newds
, "receive", tx
, "");
1112 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
1113 * succeeds; otherwise we will leak the holds on the datasets.
1116 dmu_recv_begin(char *tofs
, char *tosnap
, struct drr_begin
*drrb
,
1117 boolean_t force
, char *origin
, dmu_recv_cookie_t
*drc
)
1119 dmu_recv_begin_arg_t drba
= { 0 };
1120 dmu_replay_record_t
*drr
;
1122 bzero(drc
, sizeof (dmu_recv_cookie_t
));
1123 drc
->drc_drrb
= drrb
;
1124 drc
->drc_tosnap
= tosnap
;
1125 drc
->drc_tofs
= tofs
;
1126 drc
->drc_force
= force
;
1128 if (drrb
->drr_magic
== BSWAP_64(DMU_BACKUP_MAGIC
))
1129 drc
->drc_byteswap
= B_TRUE
;
1130 else if (drrb
->drr_magic
!= DMU_BACKUP_MAGIC
)
1131 return (SET_ERROR(EINVAL
));
1133 drr
= kmem_zalloc(sizeof (dmu_replay_record_t
), KM_SLEEP
);
1134 drr
->drr_type
= DRR_BEGIN
;
1135 drr
->drr_u
.drr_begin
= *drc
->drc_drrb
;
1136 if (drc
->drc_byteswap
) {
1137 fletcher_4_incremental_byteswap(drr
,
1138 sizeof (dmu_replay_record_t
), &drc
->drc_cksum
);
1140 fletcher_4_incremental_native(drr
,
1141 sizeof (dmu_replay_record_t
), &drc
->drc_cksum
);
1143 kmem_free(drr
, sizeof (dmu_replay_record_t
));
1145 if (drc
->drc_byteswap
) {
1146 drrb
->drr_magic
= BSWAP_64(drrb
->drr_magic
);
1147 drrb
->drr_versioninfo
= BSWAP_64(drrb
->drr_versioninfo
);
1148 drrb
->drr_creation_time
= BSWAP_64(drrb
->drr_creation_time
);
1149 drrb
->drr_type
= BSWAP_32(drrb
->drr_type
);
1150 drrb
->drr_toguid
= BSWAP_64(drrb
->drr_toguid
);
1151 drrb
->drr_fromguid
= BSWAP_64(drrb
->drr_fromguid
);
1154 drba
.drba_origin
= origin
;
1155 drba
.drba_cookie
= drc
;
1156 drba
.drba_cred
= CRED();
1158 return (dsl_sync_task(tofs
, dmu_recv_begin_check
, dmu_recv_begin_sync
,
1168 int bufsize
; /* amount of memory allocated for buf */
1170 avl_tree_t
*guid_to_ds_map
;
1173 typedef struct guid_map_entry
{
1175 dsl_dataset_t
*gme_ds
;
1180 guid_compare(const void *arg1
, const void *arg2
)
1182 const guid_map_entry_t
*gmep1
= arg1
;
1183 const guid_map_entry_t
*gmep2
= arg2
;
1185 if (gmep1
->guid
< gmep2
->guid
)
1187 else if (gmep1
->guid
> gmep2
->guid
)
1193 free_guid_map_onexit(void *arg
)
1195 avl_tree_t
*ca
= arg
;
1196 void *cookie
= NULL
;
1197 guid_map_entry_t
*gmep
;
1199 while ((gmep
= avl_destroy_nodes(ca
, &cookie
)) != NULL
) {
1200 dsl_dataset_long_rele(gmep
->gme_ds
, gmep
);
1201 dsl_dataset_rele(gmep
->gme_ds
, gmep
);
1202 kmem_free(gmep
, sizeof (guid_map_entry_t
));
1205 kmem_free(ca
, sizeof (avl_tree_t
));
1209 restore_read(struct restorearg
*ra
, int len
)
1214 /* some things will require 8-byte alignment, so everything must */
1217 while (done
< len
) {
1220 ra
->err
= vn_rdwr(UIO_READ
, ra
->vp
,
1221 (caddr_t
)ra
->buf
+ done
, len
- done
,
1222 ra
->voff
, UIO_SYSSPACE
, FAPPEND
,
1223 RLIM64_INFINITY
, CRED(), &resid
);
1225 if (resid
== len
- done
)
1226 ra
->err
= SET_ERROR(EINVAL
);
1227 ra
->voff
+= len
- done
- resid
;
1233 ASSERT3U(done
, ==, len
);
1236 fletcher_4_incremental_byteswap(rv
, len
, &ra
->cksum
);
1238 fletcher_4_incremental_native(rv
, len
, &ra
->cksum
);
1242 noinline
static void
1243 backup_byteswap(dmu_replay_record_t
*drr
)
1245 #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
1246 #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
1247 drr
->drr_type
= BSWAP_32(drr
->drr_type
);
1248 drr
->drr_payloadlen
= BSWAP_32(drr
->drr_payloadlen
);
1249 switch (drr
->drr_type
) {
1251 DO64(drr_begin
.drr_magic
);
1252 DO64(drr_begin
.drr_versioninfo
);
1253 DO64(drr_begin
.drr_creation_time
);
1254 DO32(drr_begin
.drr_type
);
1255 DO32(drr_begin
.drr_flags
);
1256 DO64(drr_begin
.drr_toguid
);
1257 DO64(drr_begin
.drr_fromguid
);
1260 DO64(drr_object
.drr_object
);
1261 DO32(drr_object
.drr_type
);
1262 DO32(drr_object
.drr_bonustype
);
1263 DO32(drr_object
.drr_blksz
);
1264 DO32(drr_object
.drr_bonuslen
);
1265 DO64(drr_object
.drr_toguid
);
1267 case DRR_FREEOBJECTS
:
1268 DO64(drr_freeobjects
.drr_firstobj
);
1269 DO64(drr_freeobjects
.drr_numobjs
);
1270 DO64(drr_freeobjects
.drr_toguid
);
1273 DO64(drr_write
.drr_object
);
1274 DO32(drr_write
.drr_type
);
1275 DO64(drr_write
.drr_offset
);
1276 DO64(drr_write
.drr_length
);
1277 DO64(drr_write
.drr_toguid
);
1278 DO64(drr_write
.drr_key
.ddk_cksum
.zc_word
[0]);
1279 DO64(drr_write
.drr_key
.ddk_cksum
.zc_word
[1]);
1280 DO64(drr_write
.drr_key
.ddk_cksum
.zc_word
[2]);
1281 DO64(drr_write
.drr_key
.ddk_cksum
.zc_word
[3]);
1282 DO64(drr_write
.drr_key
.ddk_prop
);
1284 case DRR_WRITE_BYREF
:
1285 DO64(drr_write_byref
.drr_object
);
1286 DO64(drr_write_byref
.drr_offset
);
1287 DO64(drr_write_byref
.drr_length
);
1288 DO64(drr_write_byref
.drr_toguid
);
1289 DO64(drr_write_byref
.drr_refguid
);
1290 DO64(drr_write_byref
.drr_refobject
);
1291 DO64(drr_write_byref
.drr_refoffset
);
1292 DO64(drr_write_byref
.drr_key
.ddk_cksum
.zc_word
[0]);
1293 DO64(drr_write_byref
.drr_key
.ddk_cksum
.zc_word
[1]);
1294 DO64(drr_write_byref
.drr_key
.ddk_cksum
.zc_word
[2]);
1295 DO64(drr_write_byref
.drr_key
.ddk_cksum
.zc_word
[3]);
1296 DO64(drr_write_byref
.drr_key
.ddk_prop
);
1298 case DRR_WRITE_EMBEDDED
:
1299 DO64(drr_write_embedded
.drr_object
);
1300 DO64(drr_write_embedded
.drr_offset
);
1301 DO64(drr_write_embedded
.drr_length
);
1302 DO64(drr_write_embedded
.drr_toguid
);
1303 DO32(drr_write_embedded
.drr_lsize
);
1304 DO32(drr_write_embedded
.drr_psize
);
1307 DO64(drr_free
.drr_object
);
1308 DO64(drr_free
.drr_offset
);
1309 DO64(drr_free
.drr_length
);
1310 DO64(drr_free
.drr_toguid
);
1313 DO64(drr_spill
.drr_object
);
1314 DO64(drr_spill
.drr_length
);
1315 DO64(drr_spill
.drr_toguid
);
1318 DO64(drr_end
.drr_checksum
.zc_word
[0]);
1319 DO64(drr_end
.drr_checksum
.zc_word
[1]);
1320 DO64(drr_end
.drr_checksum
.zc_word
[2]);
1321 DO64(drr_end
.drr_checksum
.zc_word
[3]);
1322 DO64(drr_end
.drr_toguid
);
1331 static inline uint8_t
1332 deduce_nblkptr(dmu_object_type_t bonus_type
, uint64_t bonus_size
)
1334 if (bonus_type
== DMU_OT_SA
) {
1338 ((DN_MAX_BONUSLEN
- bonus_size
) >> SPA_BLKPTRSHIFT
));
1343 restore_object(struct restorearg
*ra
, objset_t
*os
, struct drr_object
*drro
)
1345 dmu_object_info_t doi
;
1351 if (drro
->drr_type
== DMU_OT_NONE
||
1352 !DMU_OT_IS_VALID(drro
->drr_type
) ||
1353 !DMU_OT_IS_VALID(drro
->drr_bonustype
) ||
1354 drro
->drr_checksumtype
>= ZIO_CHECKSUM_FUNCTIONS
||
1355 drro
->drr_compress
>= ZIO_COMPRESS_FUNCTIONS
||
1356 P2PHASE(drro
->drr_blksz
, SPA_MINBLOCKSIZE
) ||
1357 drro
->drr_blksz
< SPA_MINBLOCKSIZE
||
1358 drro
->drr_blksz
> SPA_MAXBLOCKSIZE
||
1359 drro
->drr_bonuslen
> DN_MAX_BONUSLEN
) {
1360 return (SET_ERROR(EINVAL
));
1363 err
= dmu_object_info(os
, drro
->drr_object
, &doi
);
1365 if (err
!= 0 && err
!= ENOENT
)
1366 return (SET_ERROR(EINVAL
));
1367 object
= err
== 0 ? drro
->drr_object
: DMU_NEW_OBJECT
;
1369 if (drro
->drr_bonuslen
) {
1370 data
= restore_read(ra
, P2ROUNDUP(drro
->drr_bonuslen
, 8));
1376 * If we are losing blkptrs or changing the block size this must
1377 * be a new file instance. We must clear out the previous file
1378 * contents before we can change this type of metadata in the dnode.
1383 nblkptr
= deduce_nblkptr(drro
->drr_bonustype
,
1384 drro
->drr_bonuslen
);
1386 if (drro
->drr_blksz
!= doi
.doi_data_block_size
||
1387 nblkptr
< doi
.doi_nblkptr
) {
1388 err
= dmu_free_long_range(os
, drro
->drr_object
,
1391 return (SET_ERROR(EINVAL
));
1395 tx
= dmu_tx_create(os
);
1396 dmu_tx_hold_bonus(tx
, object
);
1397 err
= dmu_tx_assign(tx
, TXG_WAIT
);
1403 if (object
== DMU_NEW_OBJECT
) {
1404 /* currently free, want to be allocated */
1405 err
= dmu_object_claim(os
, drro
->drr_object
,
1406 drro
->drr_type
, drro
->drr_blksz
,
1407 drro
->drr_bonustype
, drro
->drr_bonuslen
, tx
);
1408 } else if (drro
->drr_type
!= doi
.doi_type
||
1409 drro
->drr_blksz
!= doi
.doi_data_block_size
||
1410 drro
->drr_bonustype
!= doi
.doi_bonus_type
||
1411 drro
->drr_bonuslen
!= doi
.doi_bonus_size
) {
1412 /* currently allocated, but with different properties */
1413 err
= dmu_object_reclaim(os
, drro
->drr_object
,
1414 drro
->drr_type
, drro
->drr_blksz
,
1415 drro
->drr_bonustype
, drro
->drr_bonuslen
, tx
);
1419 return (SET_ERROR(EINVAL
));
1422 dmu_object_set_checksum(os
, drro
->drr_object
, drro
->drr_checksumtype
,
1424 dmu_object_set_compress(os
, drro
->drr_object
, drro
->drr_compress
, tx
);
1429 VERIFY(0 == dmu_bonus_hold(os
, drro
->drr_object
, FTAG
, &db
));
1430 dmu_buf_will_dirty(db
, tx
);
1432 ASSERT3U(db
->db_size
, >=, drro
->drr_bonuslen
);
1433 bcopy(data
, db
->db_data
, drro
->drr_bonuslen
);
1435 dmu_object_byteswap_t byteswap
=
1436 DMU_OT_BYTESWAP(drro
->drr_bonustype
);
1437 dmu_ot_byteswap
[byteswap
].ob_func(db
->db_data
,
1438 drro
->drr_bonuslen
);
1440 dmu_buf_rele(db
, FTAG
);
1448 restore_freeobjects(struct restorearg
*ra
, objset_t
*os
,
1449 struct drr_freeobjects
*drrfo
)
1453 if (drrfo
->drr_firstobj
+ drrfo
->drr_numobjs
< drrfo
->drr_firstobj
)
1454 return (SET_ERROR(EINVAL
));
1456 for (obj
= drrfo
->drr_firstobj
;
1457 obj
< drrfo
->drr_firstobj
+ drrfo
->drr_numobjs
;
1458 (void) dmu_object_next(os
, &obj
, FALSE
, 0)) {
1461 if (dmu_object_info(os
, obj
, NULL
) != 0)
1464 err
= dmu_free_long_object(os
, obj
);
1472 restore_write(struct restorearg
*ra
, objset_t
*os
,
1473 struct drr_write
*drrw
)
1479 if (drrw
->drr_offset
+ drrw
->drr_length
< drrw
->drr_offset
||
1480 !DMU_OT_IS_VALID(drrw
->drr_type
))
1481 return (SET_ERROR(EINVAL
));
1483 data
= restore_read(ra
, drrw
->drr_length
);
1487 if (dmu_object_info(os
, drrw
->drr_object
, NULL
) != 0)
1488 return (SET_ERROR(EINVAL
));
1490 tx
= dmu_tx_create(os
);
1492 dmu_tx_hold_write(tx
, drrw
->drr_object
,
1493 drrw
->drr_offset
, drrw
->drr_length
);
1494 err
= dmu_tx_assign(tx
, TXG_WAIT
);
1500 dmu_object_byteswap_t byteswap
=
1501 DMU_OT_BYTESWAP(drrw
->drr_type
);
1502 dmu_ot_byteswap
[byteswap
].ob_func(data
, drrw
->drr_length
);
1504 dmu_write(os
, drrw
->drr_object
,
1505 drrw
->drr_offset
, drrw
->drr_length
, data
, tx
);
1511 * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
1512 * streams to refer to a copy of the data that is already on the
1513 * system because it came in earlier in the stream. This function
1514 * finds the earlier copy of the data, and uses that copy instead of
1515 * data from the stream to fulfill this write.
1518 restore_write_byref(struct restorearg
*ra
, objset_t
*os
,
1519 struct drr_write_byref
*drrwbr
)
1523 guid_map_entry_t gmesrch
;
1524 guid_map_entry_t
*gmep
;
1526 objset_t
*ref_os
= NULL
;
1529 if (drrwbr
->drr_offset
+ drrwbr
->drr_length
< drrwbr
->drr_offset
)
1530 return (SET_ERROR(EINVAL
));
1533 * If the GUID of the referenced dataset is different from the
1534 * GUID of the target dataset, find the referenced dataset.
1536 if (drrwbr
->drr_toguid
!= drrwbr
->drr_refguid
) {
1537 gmesrch
.guid
= drrwbr
->drr_refguid
;
1538 if ((gmep
= avl_find(ra
->guid_to_ds_map
, &gmesrch
,
1540 return (SET_ERROR(EINVAL
));
1542 if (dmu_objset_from_ds(gmep
->gme_ds
, &ref_os
))
1543 return (SET_ERROR(EINVAL
));
1548 err
= dmu_buf_hold(ref_os
, drrwbr
->drr_refobject
,
1549 drrwbr
->drr_refoffset
, FTAG
, &dbp
, DMU_READ_PREFETCH
);
1553 tx
= dmu_tx_create(os
);
1555 dmu_tx_hold_write(tx
, drrwbr
->drr_object
,
1556 drrwbr
->drr_offset
, drrwbr
->drr_length
);
1557 err
= dmu_tx_assign(tx
, TXG_WAIT
);
1562 dmu_write(os
, drrwbr
->drr_object
,
1563 drrwbr
->drr_offset
, drrwbr
->drr_length
, dbp
->db_data
, tx
);
1564 dmu_buf_rele(dbp
, FTAG
);
1570 restore_write_embedded(struct restorearg
*ra
, objset_t
*os
,
1571 struct drr_write_embedded
*drrwnp
)
1577 if (drrwnp
->drr_offset
+ drrwnp
->drr_length
< drrwnp
->drr_offset
)
1580 if (drrwnp
->drr_psize
> BPE_PAYLOAD_SIZE
)
1583 if (drrwnp
->drr_etype
>= NUM_BP_EMBEDDED_TYPES
)
1585 if (drrwnp
->drr_compression
>= ZIO_COMPRESS_FUNCTIONS
)
1588 data
= restore_read(ra
, P2ROUNDUP(drrwnp
->drr_psize
, 8));
1592 tx
= dmu_tx_create(os
);
1594 dmu_tx_hold_write(tx
, drrwnp
->drr_object
,
1595 drrwnp
->drr_offset
, drrwnp
->drr_length
);
1596 err
= dmu_tx_assign(tx
, TXG_WAIT
);
1602 dmu_write_embedded(os
, drrwnp
->drr_object
,
1603 drrwnp
->drr_offset
, data
, drrwnp
->drr_etype
,
1604 drrwnp
->drr_compression
, drrwnp
->drr_lsize
, drrwnp
->drr_psize
,
1605 ra
->byteswap
^ ZFS_HOST_BYTEORDER
, tx
);
1612 restore_spill(struct restorearg
*ra
, objset_t
*os
, struct drr_spill
*drrs
)
1616 dmu_buf_t
*db
, *db_spill
;
1619 if (drrs
->drr_length
< SPA_MINBLOCKSIZE
||
1620 drrs
->drr_length
> SPA_MAXBLOCKSIZE
)
1621 return (SET_ERROR(EINVAL
));
1623 data
= restore_read(ra
, drrs
->drr_length
);
1627 if (dmu_object_info(os
, drrs
->drr_object
, NULL
) != 0)
1628 return (SET_ERROR(EINVAL
));
1630 VERIFY(0 == dmu_bonus_hold(os
, drrs
->drr_object
, FTAG
, &db
));
1631 if ((err
= dmu_spill_hold_by_bonus(db
, FTAG
, &db_spill
)) != 0) {
1632 dmu_buf_rele(db
, FTAG
);
1636 tx
= dmu_tx_create(os
);
1638 dmu_tx_hold_spill(tx
, db
->db_object
);
1640 err
= dmu_tx_assign(tx
, TXG_WAIT
);
1642 dmu_buf_rele(db
, FTAG
);
1643 dmu_buf_rele(db_spill
, FTAG
);
1647 dmu_buf_will_dirty(db_spill
, tx
);
1649 if (db_spill
->db_size
< drrs
->drr_length
)
1650 VERIFY(0 == dbuf_spill_set_blksz(db_spill
,
1651 drrs
->drr_length
, tx
));
1652 bcopy(data
, db_spill
->db_data
, drrs
->drr_length
);
1654 dmu_buf_rele(db
, FTAG
);
1655 dmu_buf_rele(db_spill
, FTAG
);
1663 restore_free(struct restorearg
*ra
, objset_t
*os
,
1664 struct drr_free
*drrf
)
1668 if (drrf
->drr_length
!= -1ULL &&
1669 drrf
->drr_offset
+ drrf
->drr_length
< drrf
->drr_offset
)
1670 return (SET_ERROR(EINVAL
));
1672 if (dmu_object_info(os
, drrf
->drr_object
, NULL
) != 0)
1673 return (SET_ERROR(EINVAL
));
1675 err
= dmu_free_long_range(os
, drrf
->drr_object
,
1676 drrf
->drr_offset
, drrf
->drr_length
);
1680 /* used to destroy the drc_ds on error */
1682 dmu_recv_cleanup_ds(dmu_recv_cookie_t
*drc
)
1684 char name
[MAXNAMELEN
];
1685 dsl_dataset_name(drc
->drc_ds
, name
);
1686 dsl_dataset_disown(drc
->drc_ds
, dmu_recv_tag
);
1687 (void) dsl_destroy_head(name
);
1691 * NB: callers *must* call dmu_recv_end() if this succeeds.
1694 dmu_recv_stream(dmu_recv_cookie_t
*drc
, vnode_t
*vp
, offset_t
*voffp
,
1695 int cleanup_fd
, uint64_t *action_handlep
)
1697 struct restorearg ra
= { 0 };
1698 dmu_replay_record_t
*drr
;
1703 ra
.byteswap
= drc
->drc_byteswap
;
1704 ra
.cksum
= drc
->drc_cksum
;
1708 ra
.buf
= vmem_alloc(ra
.bufsize
, KM_SLEEP
);
1710 /* these were verified in dmu_recv_begin */
1711 ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc
->drc_drrb
->drr_versioninfo
), ==,
1713 ASSERT3U(drc
->drc_drrb
->drr_type
, <, DMU_OST_NUMTYPES
);
1716 * Open the objset we are modifying.
1718 VERIFY0(dmu_objset_from_ds(drc
->drc_ds
, &os
));
1720 ASSERT(drc
->drc_ds
->ds_phys
->ds_flags
& DS_FLAG_INCONSISTENT
);
1722 featureflags
= DMU_GET_FEATUREFLAGS(drc
->drc_drrb
->drr_versioninfo
);
1724 /* if this stream is dedup'ed, set up the avl tree for guid mapping */
1725 if (featureflags
& DMU_BACKUP_FEATURE_DEDUP
) {
1728 if (cleanup_fd
== -1) {
1729 ra
.err
= SET_ERROR(EBADF
);
1732 ra
.err
= zfs_onexit_fd_hold(cleanup_fd
, &minor
);
1738 if (*action_handlep
== 0) {
1740 kmem_alloc(sizeof (avl_tree_t
), KM_SLEEP
);
1741 avl_create(ra
.guid_to_ds_map
, guid_compare
,
1742 sizeof (guid_map_entry_t
),
1743 offsetof(guid_map_entry_t
, avlnode
));
1744 ra
.err
= zfs_onexit_add_cb(minor
,
1745 free_guid_map_onexit
, ra
.guid_to_ds_map
,
1750 ra
.err
= zfs_onexit_cb_data(minor
, *action_handlep
,
1751 (void **)&ra
.guid_to_ds_map
);
1756 drc
->drc_guid_to_ds_map
= ra
.guid_to_ds_map
;
1760 * Read records and process them.
1763 while (ra
.err
== 0 &&
1764 NULL
!= (drr
= restore_read(&ra
, sizeof (*drr
)))) {
1765 if (issig(JUSTLOOKING
) && issig(FORREAL
)) {
1766 ra
.err
= SET_ERROR(EINTR
);
1771 backup_byteswap(drr
);
1773 switch (drr
->drr_type
) {
1777 * We need to make a copy of the record header,
1778 * because restore_{object,write} may need to
1779 * restore_read(), which will invalidate drr.
1781 struct drr_object drro
= drr
->drr_u
.drr_object
;
1782 ra
.err
= restore_object(&ra
, os
, &drro
);
1785 case DRR_FREEOBJECTS
:
1787 struct drr_freeobjects drrfo
=
1788 drr
->drr_u
.drr_freeobjects
;
1789 ra
.err
= restore_freeobjects(&ra
, os
, &drrfo
);
1794 struct drr_write drrw
= drr
->drr_u
.drr_write
;
1795 ra
.err
= restore_write(&ra
, os
, &drrw
);
1798 case DRR_WRITE_BYREF
:
1800 struct drr_write_byref drrwbr
=
1801 drr
->drr_u
.drr_write_byref
;
1802 ra
.err
= restore_write_byref(&ra
, os
, &drrwbr
);
1805 case DRR_WRITE_EMBEDDED
:
1807 struct drr_write_embedded drrwe
=
1808 drr
->drr_u
.drr_write_embedded
;
1809 ra
.err
= restore_write_embedded(&ra
, os
, &drrwe
);
1814 struct drr_free drrf
= drr
->drr_u
.drr_free
;
1815 ra
.err
= restore_free(&ra
, os
, &drrf
);
1820 struct drr_end drre
= drr
->drr_u
.drr_end
;
1822 * We compare against the *previous* checksum
1823 * value, because the stored checksum is of
1824 * everything before the DRR_END record.
1826 if (!ZIO_CHECKSUM_EQUAL(drre
.drr_checksum
, pcksum
))
1827 ra
.err
= SET_ERROR(ECKSUM
);
1832 struct drr_spill drrs
= drr
->drr_u
.drr_spill
;
1833 ra
.err
= restore_spill(&ra
, os
, &drrs
);
1837 ra
.err
= SET_ERROR(EINVAL
);
1842 ASSERT(ra
.err
!= 0);
1845 if ((featureflags
& DMU_BACKUP_FEATURE_DEDUP
) && (cleanup_fd
!= -1))
1846 zfs_onexit_fd_rele(cleanup_fd
);
1850 * destroy what we created, so we don't leave it in the
1851 * inconsistent restoring state.
1853 dmu_recv_cleanup_ds(drc
);
1856 vmem_free(ra
.buf
, ra
.bufsize
);
1862 dmu_recv_end_check(void *arg
, dmu_tx_t
*tx
)
1864 dmu_recv_cookie_t
*drc
= arg
;
1865 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
1868 ASSERT3P(drc
->drc_ds
->ds_owner
, ==, dmu_recv_tag
);
1870 if (!drc
->drc_newfs
) {
1871 dsl_dataset_t
*origin_head
;
1873 error
= dsl_dataset_hold(dp
, drc
->drc_tofs
, FTAG
, &origin_head
);
1876 if (drc
->drc_force
) {
1878 * We will destroy any snapshots in tofs (i.e. before
1879 * origin_head) that are after the origin (which is
1880 * the snap before drc_ds, because drc_ds can not
1881 * have any snaps of its own).
1883 uint64_t obj
= origin_head
->ds_phys
->ds_prev_snap_obj
;
1884 while (obj
!= drc
->drc_ds
->ds_phys
->ds_prev_snap_obj
) {
1885 dsl_dataset_t
*snap
;
1886 error
= dsl_dataset_hold_obj(dp
, obj
, FTAG
,
1890 if (snap
->ds_dir
!= origin_head
->ds_dir
)
1891 error
= SET_ERROR(EINVAL
);
1893 error
= dsl_destroy_snapshot_check_impl(
1896 obj
= snap
->ds_phys
->ds_prev_snap_obj
;
1897 dsl_dataset_rele(snap
, FTAG
);
1902 error
= dsl_dataset_clone_swap_check_impl(drc
->drc_ds
,
1903 origin_head
, drc
->drc_force
, drc
->drc_owner
, tx
);
1905 dsl_dataset_rele(origin_head
, FTAG
);
1908 error
= dsl_dataset_snapshot_check_impl(origin_head
,
1909 drc
->drc_tosnap
, tx
, B_TRUE
);
1910 dsl_dataset_rele(origin_head
, FTAG
);
1914 error
= dsl_destroy_head_check_impl(drc
->drc_ds
, 1);
1916 error
= dsl_dataset_snapshot_check_impl(drc
->drc_ds
,
1917 drc
->drc_tosnap
, tx
, B_TRUE
);
1923 dmu_recv_end_sync(void *arg
, dmu_tx_t
*tx
)
1925 dmu_recv_cookie_t
*drc
= arg
;
1926 dsl_pool_t
*dp
= dmu_tx_pool(tx
);
1928 spa_history_log_internal_ds(drc
->drc_ds
, "finish receiving",
1929 tx
, "snap=%s", drc
->drc_tosnap
);
1931 if (!drc
->drc_newfs
) {
1932 dsl_dataset_t
*origin_head
;
1934 VERIFY0(dsl_dataset_hold(dp
, drc
->drc_tofs
, FTAG
,
1937 if (drc
->drc_force
) {
1939 * Destroy any snapshots of drc_tofs (origin_head)
1940 * after the origin (the snap before drc_ds).
1942 uint64_t obj
= origin_head
->ds_phys
->ds_prev_snap_obj
;
1943 while (obj
!= drc
->drc_ds
->ds_phys
->ds_prev_snap_obj
) {
1944 dsl_dataset_t
*snap
;
1945 VERIFY0(dsl_dataset_hold_obj(dp
, obj
, FTAG
,
1947 ASSERT3P(snap
->ds_dir
, ==, origin_head
->ds_dir
);
1948 obj
= snap
->ds_phys
->ds_prev_snap_obj
;
1949 dsl_destroy_snapshot_sync_impl(snap
,
1951 dsl_dataset_rele(snap
, FTAG
);
1954 VERIFY3P(drc
->drc_ds
->ds_prev
, ==,
1955 origin_head
->ds_prev
);
1957 dsl_dataset_clone_swap_sync_impl(drc
->drc_ds
,
1959 dsl_dataset_snapshot_sync_impl(origin_head
,
1960 drc
->drc_tosnap
, tx
);
1962 /* set snapshot's creation time and guid */
1963 dmu_buf_will_dirty(origin_head
->ds_prev
->ds_dbuf
, tx
);
1964 origin_head
->ds_prev
->ds_phys
->ds_creation_time
=
1965 drc
->drc_drrb
->drr_creation_time
;
1966 origin_head
->ds_prev
->ds_phys
->ds_guid
=
1967 drc
->drc_drrb
->drr_toguid
;
1968 origin_head
->ds_prev
->ds_phys
->ds_flags
&=
1969 ~DS_FLAG_INCONSISTENT
;
1971 dmu_buf_will_dirty(origin_head
->ds_dbuf
, tx
);
1972 origin_head
->ds_phys
->ds_flags
&= ~DS_FLAG_INCONSISTENT
;
1974 dsl_dataset_rele(origin_head
, FTAG
);
1975 dsl_destroy_head_sync_impl(drc
->drc_ds
, tx
);
1977 if (drc
->drc_owner
!= NULL
)
1978 VERIFY3P(origin_head
->ds_owner
, ==, drc
->drc_owner
);
1980 dsl_dataset_t
*ds
= drc
->drc_ds
;
1982 dsl_dataset_snapshot_sync_impl(ds
, drc
->drc_tosnap
, tx
);
1984 /* set snapshot's creation time and guid */
1985 dmu_buf_will_dirty(ds
->ds_prev
->ds_dbuf
, tx
);
1986 ds
->ds_prev
->ds_phys
->ds_creation_time
=
1987 drc
->drc_drrb
->drr_creation_time
;
1988 ds
->ds_prev
->ds_phys
->ds_guid
= drc
->drc_drrb
->drr_toguid
;
1989 ds
->ds_prev
->ds_phys
->ds_flags
&= ~DS_FLAG_INCONSISTENT
;
1991 dmu_buf_will_dirty(ds
->ds_dbuf
, tx
);
1992 ds
->ds_phys
->ds_flags
&= ~DS_FLAG_INCONSISTENT
;
1994 drc
->drc_newsnapobj
= drc
->drc_ds
->ds_phys
->ds_prev_snap_obj
;
1996 * Release the hold from dmu_recv_begin. This must be done before
1997 * we return to open context, so that when we free the dataset's dnode,
1998 * we can evict its bonus buffer.
2000 dsl_dataset_disown(drc
->drc_ds
, dmu_recv_tag
);
2005 add_ds_to_guidmap(const char *name
, avl_tree_t
*guid_map
, uint64_t snapobj
)
2008 dsl_dataset_t
*snapds
;
2009 guid_map_entry_t
*gmep
;
2012 ASSERT(guid_map
!= NULL
);
2014 err
= dsl_pool_hold(name
, FTAG
, &dp
);
2017 gmep
= kmem_alloc(sizeof (*gmep
), KM_SLEEP
);
2018 err
= dsl_dataset_hold_obj(dp
, snapobj
, gmep
, &snapds
);
2020 gmep
->guid
= snapds
->ds_phys
->ds_guid
;
2021 gmep
->gme_ds
= snapds
;
2022 avl_add(guid_map
, gmep
);
2023 dsl_dataset_long_hold(snapds
, gmep
);
2025 kmem_free(gmep
, sizeof (*gmep
));
2028 dsl_pool_rele(dp
, FTAG
);
2032 static int dmu_recv_end_modified_blocks
= 3;
2035 dmu_recv_existing_end(dmu_recv_cookie_t
*drc
)
2043 * We will be destroying the ds; make sure its origin is unmounted if
2046 name
= kmem_alloc(MAXNAMELEN
, KM_SLEEP
);
2047 dsl_dataset_name(drc
->drc_ds
, name
);
2048 zfs_destroy_unmount_origin(name
);
2049 kmem_free(name
, MAXNAMELEN
);
2052 error
= dsl_sync_task(drc
->drc_tofs
,
2053 dmu_recv_end_check
, dmu_recv_end_sync
, drc
,
2054 dmu_recv_end_modified_blocks
);
2057 dmu_recv_cleanup_ds(drc
);
2062 dmu_recv_new_end(dmu_recv_cookie_t
*drc
)
2066 error
= dsl_sync_task(drc
->drc_tofs
,
2067 dmu_recv_end_check
, dmu_recv_end_sync
, drc
,
2068 dmu_recv_end_modified_blocks
);
2071 dmu_recv_cleanup_ds(drc
);
2072 } else if (drc
->drc_guid_to_ds_map
!= NULL
) {
2073 (void) add_ds_to_guidmap(drc
->drc_tofs
,
2074 drc
->drc_guid_to_ds_map
,
2075 drc
->drc_newsnapobj
);
2081 dmu_recv_end(dmu_recv_cookie_t
*drc
, void *owner
)
2083 drc
->drc_owner
= owner
;
2086 return (dmu_recv_new_end(drc
));
2088 return (dmu_recv_existing_end(drc
));
2092 * Return TRUE if this objset is currently being received into.
2095 dmu_objset_is_receiving(objset_t
*os
)
2097 return (os
->os_dsl_dataset
!= NULL
&&
2098 os
->os_dsl_dataset
->ds_owner
== dmu_recv_tag
);
2101 #if defined(_KERNEL)
2102 module_param(zfs_send_corrupt_data
, int, 0644);
2103 MODULE_PARM_DESC(zfs_send_corrupt_data
, "Allow sending corrupt data");