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.
25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
29 #include <sys/dmu_impl.h>
30 #include <sys/dmu_tx.h>
32 #include <sys/dnode.h>
33 #include <sys/zfs_context.h>
34 #include <sys/dmu_objset.h>
35 #include <sys/dmu_traverse.h>
36 #include <sys/dsl_dataset.h>
37 #include <sys/dsl_dir.h>
38 #include <sys/dsl_prop.h>
39 #include <sys/dsl_pool.h>
40 #include <sys/dsl_synctask.h>
41 #include <sys/zfs_ioctl.h>
43 #include <sys/zio_checksum.h>
44 #include <sys/zfs_znode.h>
45 #include <zfs_fletcher.h>
48 #include <sys/zfs_onexit.h>
50 static char *dmu_recv_tag = "dmu_recv_tag";
53 * The list of data whose inclusion in a send stream can be pending from
54 * one call to backup_cb to another. Multiple calls to dump_free() and
55 * dump_freeobjects() can be aggregated into a single DRR_FREE or
56 * DRR_FREEOBJECTS replay record.
65 dmu_replay_record_t *drr;
76 dump_bytes(struct backuparg *ba, void *buf, int len)
78 ssize_t resid; /* have to get resid to get detailed errno */
79 ASSERT3U(len % 8, ==, 0);
81 fletcher_4_incremental_native(buf, len, &ba->zc);
82 ba->err = vn_rdwr(UIO_WRITE, ba->vp,
84 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
90 dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
93 struct drr_free *drrf = &(ba->drr->drr_u.drr_free);
96 * If there is a pending op, but it's not PENDING_FREE, push it out,
97 * since free block aggregation can only be done for blocks of the
98 * same type (i.e., DRR_FREE records can only be aggregated with
99 * other DRR_FREE records. DRR_FREEOBJECTS records can only be
100 * aggregated with other DRR_FREEOBJECTS records.
102 if (ba->pending_op != PENDING_NONE && ba->pending_op != PENDING_FREE) {
103 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
105 ba->pending_op = PENDING_NONE;
108 if (ba->pending_op == PENDING_FREE) {
110 * There should never be a PENDING_FREE if length is -1
111 * (because dump_dnode is the only place where this
112 * function is called with a -1, and only after flushing
113 * any pending record).
115 ASSERT(length != -1ULL);
117 * Check to see whether this free block can be aggregated
120 if (drrf->drr_object == object && drrf->drr_offset +
121 drrf->drr_length == offset) {
122 drrf->drr_length += length;
125 /* not a continuation. Push out pending record */
126 if (dump_bytes(ba, ba->drr,
127 sizeof (dmu_replay_record_t)) != 0)
129 ba->pending_op = PENDING_NONE;
132 /* create a FREE record and make it pending */
133 bzero(ba->drr, sizeof (dmu_replay_record_t));
134 ba->drr->drr_type = DRR_FREE;
135 drrf->drr_object = object;
136 drrf->drr_offset = offset;
137 drrf->drr_length = length;
138 drrf->drr_toguid = ba->toguid;
139 if (length == -1ULL) {
140 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
143 ba->pending_op = PENDING_FREE;
150 dump_data(struct backuparg *ba, dmu_object_type_t type,
151 uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
153 struct drr_write *drrw = &(ba->drr->drr_u.drr_write);
157 * If there is any kind of pending aggregation (currently either
158 * a grouping of free objects or free blocks), push it out to
159 * the stream, since aggregation can't be done across operations
160 * of different types.
162 if (ba->pending_op != PENDING_NONE) {
163 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
165 ba->pending_op = PENDING_NONE;
167 /* write a DATA record */
168 bzero(ba->drr, sizeof (dmu_replay_record_t));
169 ba->drr->drr_type = DRR_WRITE;
170 drrw->drr_object = object;
171 drrw->drr_type = type;
172 drrw->drr_offset = offset;
173 drrw->drr_length = blksz;
174 drrw->drr_toguid = ba->toguid;
175 drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
176 if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
177 drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
178 DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
179 DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
180 DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
181 drrw->drr_key.ddk_cksum = bp->blk_cksum;
183 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
185 if (dump_bytes(ba, data, blksz) != 0)
191 dump_spill(struct backuparg *ba, uint64_t object, int blksz, void *data)
193 struct drr_spill *drrs = &(ba->drr->drr_u.drr_spill);
195 if (ba->pending_op != PENDING_NONE) {
196 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
198 ba->pending_op = PENDING_NONE;
201 /* write a SPILL record */
202 bzero(ba->drr, sizeof (dmu_replay_record_t));
203 ba->drr->drr_type = DRR_SPILL;
204 drrs->drr_object = object;
205 drrs->drr_length = blksz;
206 drrs->drr_toguid = ba->toguid;
208 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
210 if (dump_bytes(ba, data, blksz))
216 dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
218 struct drr_freeobjects *drrfo = &(ba->drr->drr_u.drr_freeobjects);
221 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
222 * push it out, since free block aggregation can only be done for
223 * blocks of the same type (i.e., DRR_FREE records can only be
224 * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
225 * can only be aggregated with other DRR_FREEOBJECTS records.
227 if (ba->pending_op != PENDING_NONE &&
228 ba->pending_op != PENDING_FREEOBJECTS) {
229 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
231 ba->pending_op = PENDING_NONE;
233 if (ba->pending_op == PENDING_FREEOBJECTS) {
235 * See whether this free object array can be aggregated
238 if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
239 drrfo->drr_numobjs += numobjs;
242 /* can't be aggregated. Push out pending record */
243 if (dump_bytes(ba, ba->drr,
244 sizeof (dmu_replay_record_t)) != 0)
246 ba->pending_op = PENDING_NONE;
250 /* write a FREEOBJECTS record */
251 bzero(ba->drr, sizeof (dmu_replay_record_t));
252 ba->drr->drr_type = DRR_FREEOBJECTS;
253 drrfo->drr_firstobj = firstobj;
254 drrfo->drr_numobjs = numobjs;
255 drrfo->drr_toguid = ba->toguid;
257 ba->pending_op = PENDING_FREEOBJECTS;
263 dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
265 struct drr_object *drro = &(ba->drr->drr_u.drr_object);
267 if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
268 return (dump_freeobjects(ba, object, 1));
270 if (ba->pending_op != PENDING_NONE) {
271 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
273 ba->pending_op = PENDING_NONE;
276 /* write an OBJECT record */
277 bzero(ba->drr, sizeof (dmu_replay_record_t));
278 ba->drr->drr_type = DRR_OBJECT;
279 drro->drr_object = object;
280 drro->drr_type = dnp->dn_type;
281 drro->drr_bonustype = dnp->dn_bonustype;
282 drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
283 drro->drr_bonuslen = dnp->dn_bonuslen;
284 drro->drr_checksumtype = dnp->dn_checksum;
285 drro->drr_compress = dnp->dn_compress;
286 drro->drr_toguid = ba->toguid;
288 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
291 if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
294 /* free anything past the end of the file */
295 if (dump_free(ba, object, (dnp->dn_maxblkid + 1) *
296 (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
303 #define BP_SPAN(dnp, level) \
304 (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
305 (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
309 backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
310 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
312 struct backuparg *ba = arg;
313 dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
316 if (issig(JUSTLOOKING) && issig(FORREAL))
319 if (zb->zb_object != DMU_META_DNODE_OBJECT &&
320 DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
322 } else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) {
323 uint64_t span = BP_SPAN(dnp, zb->zb_level);
324 uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
325 err = dump_freeobjects(ba, dnobj, span >> DNODE_SHIFT);
326 } else if (bp == NULL) {
327 uint64_t span = BP_SPAN(dnp, zb->zb_level);
328 err = dump_free(ba, zb->zb_object, zb->zb_blkid * span, span);
329 } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
331 } else if (type == DMU_OT_DNODE) {
334 int blksz = BP_GET_LSIZE(bp);
335 uint32_t aflags = ARC_WAIT;
338 if (dsl_read(NULL, spa, bp, pbuf,
339 arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
340 ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
344 for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
345 uint64_t dnobj = (zb->zb_blkid <<
346 (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
347 err = dump_dnode(ba, dnobj, blk+i);
351 (void) arc_buf_remove_ref(abuf, &abuf);
352 } else if (type == DMU_OT_SA) {
353 uint32_t aflags = ARC_WAIT;
355 int blksz = BP_GET_LSIZE(bp);
357 if (arc_read_nolock(NULL, spa, bp,
358 arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
359 ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
362 err = dump_spill(ba, zb->zb_object, blksz, abuf->b_data);
363 (void) arc_buf_remove_ref(abuf, &abuf);
364 } else { /* it's a level-0 block of a regular object */
365 uint32_t aflags = ARC_WAIT;
367 int blksz = BP_GET_LSIZE(bp);
369 if (dsl_read(NULL, spa, bp, pbuf,
370 arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
371 ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
374 err = dump_data(ba, type, zb->zb_object, zb->zb_blkid * blksz,
375 blksz, bp, abuf->b_data);
376 (void) arc_buf_remove_ref(abuf, &abuf);
379 ASSERT(err == 0 || err == EINTR);
384 dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
385 vnode_t *vp, offset_t *off)
387 dsl_dataset_t *ds = tosnap->os_dsl_dataset;
388 dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
389 dmu_replay_record_t *drr;
392 uint64_t fromtxg = 0;
394 /* tosnap must be a snapshot */
395 if (ds->ds_phys->ds_next_snap_obj == 0)
398 /* fromsnap must be an earlier snapshot from the same fs as tosnap */
399 if (fromds && (ds->ds_dir != fromds->ds_dir ||
400 fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
404 dsl_pool_t *dp = ds->ds_dir->dd_pool;
409 if (dsl_dir_is_clone(ds->ds_dir)) {
410 rw_enter(&dp->dp_config_rwlock, RW_READER);
411 err = dsl_dataset_hold_obj(dp,
412 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
413 rw_exit(&dp->dp_config_rwlock);
417 fromorigin = B_FALSE;
422 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
423 drr->drr_type = DRR_BEGIN;
424 drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
425 DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
429 if (dmu_objset_type(tosnap) == DMU_OST_ZFS) {
431 if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0)
433 if (version == ZPL_VERSION_SA) {
434 DMU_SET_FEATUREFLAGS(
435 drr->drr_u.drr_begin.drr_versioninfo,
436 DMU_BACKUP_FEATURE_SA_SPILL);
441 drr->drr_u.drr_begin.drr_creation_time =
442 ds->ds_phys->ds_creation_time;
443 drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type;
445 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
446 drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
447 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
448 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
451 drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
452 dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
455 fromtxg = fromds->ds_phys->ds_creation_txg;
457 dsl_dataset_rele(fromds, FTAG);
463 ba.toguid = ds->ds_phys->ds_guid;
464 ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0);
465 ba.pending_op = PENDING_NONE;
467 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
468 kmem_free(drr, sizeof (dmu_replay_record_t));
472 err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
475 if (ba.pending_op != PENDING_NONE)
476 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0)
480 if (err == EINTR && ba.err)
482 kmem_free(drr, sizeof (dmu_replay_record_t));
486 bzero(drr, sizeof (dmu_replay_record_t));
487 drr->drr_type = DRR_END;
488 drr->drr_u.drr_end.drr_checksum = ba.zc;
489 drr->drr_u.drr_end.drr_toguid = ba.toguid;
491 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
492 kmem_free(drr, sizeof (dmu_replay_record_t));
496 kmem_free(drr, sizeof (dmu_replay_record_t));
501 struct recvbeginsyncarg {
504 dsl_dataset_t *origin;
506 dmu_objset_type_t type;
510 char clonelastname[MAXNAMELEN];
511 dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */
517 recv_new_check(void *arg1, void *arg2, dmu_tx_t *tx)
519 dsl_dir_t *dd = arg1;
520 struct recvbeginsyncarg *rbsa = arg2;
521 objset_t *mos = dd->dd_pool->dp_meta_objset;
525 err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
526 strrchr(rbsa->tofs, '/') + 1, sizeof (uint64_t), 1, &val);
529 return (err ? err : EEXIST);
532 /* make sure it's a snap in the same pool */
533 if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool)
535 if (!dsl_dataset_is_snapshot(rbsa->origin))
537 if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
545 recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx)
547 dsl_dir_t *dd = arg1;
548 struct recvbeginsyncarg *rbsa = arg2;
549 uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
552 /* Create and open new dataset. */
553 dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1,
554 rbsa->origin, flags, rbsa->cr, tx);
555 VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj,
556 B_TRUE, dmu_recv_tag, &rbsa->ds));
558 if (rbsa->origin == NULL) {
559 (void) dmu_objset_create_impl(dd->dd_pool->dp_spa,
560 rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx);
563 spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC,
564 dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj);
569 recv_existing_check(void *arg1, void *arg2, dmu_tx_t *tx)
571 dsl_dataset_t *ds = arg1;
572 struct recvbeginsyncarg *rbsa = arg2;
576 /* must not have any changes since most recent snapshot */
577 if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
580 /* new snapshot name must not exist */
581 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
582 ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val);
588 if (rbsa->fromguid) {
589 /* if incremental, most recent snapshot must match fromguid */
590 if (ds->ds_prev == NULL)
594 * most recent snapshot must match fromguid, or there are no
595 * changes since the fromguid one
597 if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) {
598 uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth;
599 uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj;
602 err = dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
606 if (snap->ds_phys->ds_creation_txg < birth) {
607 dsl_dataset_rele(snap, FTAG);
610 if (snap->ds_phys->ds_guid == rbsa->fromguid) {
611 dsl_dataset_rele(snap, FTAG);
614 obj = snap->ds_phys->ds_prev_snap_obj;
615 dsl_dataset_rele(snap, FTAG);
621 /* if full, most recent snapshot must be $ORIGIN */
622 if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL)
626 /* temporary clone name must not exist */
627 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
628 ds->ds_dir->dd_phys->dd_child_dir_zapobj,
629 rbsa->clonelastname, 8, 1, &val);
640 recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx)
642 dsl_dataset_t *ohds = arg1;
643 struct recvbeginsyncarg *rbsa = arg2;
644 dsl_pool_t *dp = ohds->ds_dir->dd_pool;
646 uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
649 /* create and open the temporary clone */
650 dsobj = dsl_dataset_create_sync(ohds->ds_dir, rbsa->clonelastname,
651 ohds->ds_prev, flags, rbsa->cr, tx);
652 VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, B_TRUE, dmu_recv_tag, &cds));
655 * If we actually created a non-clone, we need to create the
656 * objset in our new dataset.
658 if (BP_IS_HOLE(dsl_dataset_get_blkptr(cds))) {
659 (void) dmu_objset_create_impl(dp->dp_spa,
660 cds, dsl_dataset_get_blkptr(cds), rbsa->type, tx);
665 spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC,
666 dp->dp_spa, tx, "dataset = %lld", dsobj);
670 dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb)
674 featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
676 /* Verify pool version supports SA if SA_SPILL feature set */
677 return ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
678 (spa_version(dsl_dataset_get_spa(ds)) < SPA_VERSION_SA));
682 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
683 * succeeds; otherwise we will leak the holds on the datasets.
686 dmu_recv_begin(char *tofs, char *tosnap, char *top_ds, struct drr_begin *drrb,
687 boolean_t force, objset_t *origin, dmu_recv_cookie_t *drc)
691 struct recvbeginsyncarg rbsa = { 0 };
692 uint64_t versioninfo;
696 if (drrb->drr_magic == DMU_BACKUP_MAGIC)
698 else if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
704 rbsa.tosnap = tosnap;
705 rbsa.origin = origin ? origin->os_dsl_dataset : NULL;
706 rbsa.fromguid = drrb->drr_fromguid;
707 rbsa.type = drrb->drr_type;
711 versioninfo = drrb->drr_versioninfo;
712 flags = drrb->drr_flags;
715 rbsa.type = BSWAP_32(rbsa.type);
716 rbsa.fromguid = BSWAP_64(rbsa.fromguid);
717 versioninfo = BSWAP_64(versioninfo);
718 flags = BSWAP_32(flags);
721 if (DMU_GET_STREAM_HDRTYPE(versioninfo) == DMU_COMPOUNDSTREAM ||
722 rbsa.type >= DMU_OST_NUMTYPES ||
723 ((flags & DRR_FLAG_CLONE) && origin == NULL))
726 if (flags & DRR_FLAG_CI_DATA)
727 rbsa.dsflags = DS_FLAG_CI_DATASET;
729 bzero(drc, sizeof (dmu_recv_cookie_t));
730 drc->drc_drrb = drrb;
731 drc->drc_tosnap = tosnap;
732 drc->drc_top_ds = top_ds;
733 drc->drc_force = force;
736 * Process the begin in syncing context.
739 /* open the dataset we are logically receiving into */
740 err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds);
742 if (dmu_recv_verify_features(ds, drrb)) {
743 dsl_dataset_rele(ds, dmu_recv_tag);
746 /* target fs already exists; recv into temp clone */
748 /* Can't recv a clone into an existing fs */
749 if (flags & DRR_FLAG_CLONE) {
750 dsl_dataset_rele(ds, dmu_recv_tag);
754 /* must not have an incremental recv already in progress */
755 if (!mutex_tryenter(&ds->ds_recvlock)) {
756 dsl_dataset_rele(ds, dmu_recv_tag);
760 /* tmp clone name is: tofs/%tosnap" */
761 (void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname),
764 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
765 recv_existing_check, recv_existing_sync, ds, &rbsa, 5);
767 mutex_exit(&ds->ds_recvlock);
768 dsl_dataset_rele(ds, dmu_recv_tag);
771 drc->drc_logical_ds = ds;
772 drc->drc_real_ds = rbsa.ds;
773 } else if (err == ENOENT) {
774 /* target fs does not exist; must be a full backup or clone */
778 * If it's a non-clone incremental, we are missing the
779 * target fs, so fail the recv.
781 if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE))
784 /* Open the parent of tofs */
785 cp = strrchr(tofs, '/');
787 err = dsl_dataset_hold(tofs, FTAG, &ds);
792 if (dmu_recv_verify_features(ds, drrb)) {
793 dsl_dataset_rele(ds, FTAG);
797 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
798 recv_new_check, recv_new_sync, ds->ds_dir, &rbsa, 5);
799 dsl_dataset_rele(ds, FTAG);
802 drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds;
803 drc->drc_newfs = B_TRUE;
815 int bufsize; /* amount of memory allocated for buf */
817 avl_tree_t *guid_to_ds_map;
820 typedef struct guid_map_entry {
822 dsl_dataset_t *gme_ds;
827 guid_compare(const void *arg1, const void *arg2)
829 const guid_map_entry_t *gmep1 = arg1;
830 const guid_map_entry_t *gmep2 = arg2;
832 if (gmep1->guid < gmep2->guid)
834 else if (gmep1->guid > gmep2->guid)
840 free_guid_map_onexit(void *arg)
842 avl_tree_t *ca = arg;
844 guid_map_entry_t *gmep;
846 while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
847 dsl_dataset_rele(gmep->gme_ds, ca);
848 kmem_free(gmep, sizeof (guid_map_entry_t));
851 kmem_free(ca, sizeof (avl_tree_t));
855 restore_read(struct restorearg *ra, int len)
860 /* some things will require 8-byte alignment, so everything must */
861 ASSERT3U(len % 8, ==, 0);
866 ra->err = vn_rdwr(UIO_READ, ra->vp,
867 (caddr_t)ra->buf + done, len - done,
868 ra->voff, UIO_SYSSPACE, FAPPEND,
869 RLIM64_INFINITY, CRED(), &resid);
871 if (resid == len - done)
873 ra->voff += len - done - resid;
879 ASSERT3U(done, ==, len);
882 fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
884 fletcher_4_incremental_native(rv, len, &ra->cksum);
889 backup_byteswap(dmu_replay_record_t *drr)
891 #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
892 #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
893 drr->drr_type = BSWAP_32(drr->drr_type);
894 drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
895 switch (drr->drr_type) {
897 DO64(drr_begin.drr_magic);
898 DO64(drr_begin.drr_versioninfo);
899 DO64(drr_begin.drr_creation_time);
900 DO32(drr_begin.drr_type);
901 DO32(drr_begin.drr_flags);
902 DO64(drr_begin.drr_toguid);
903 DO64(drr_begin.drr_fromguid);
906 DO64(drr_object.drr_object);
907 /* DO64(drr_object.drr_allocation_txg); */
908 DO32(drr_object.drr_type);
909 DO32(drr_object.drr_bonustype);
910 DO32(drr_object.drr_blksz);
911 DO32(drr_object.drr_bonuslen);
912 DO64(drr_object.drr_toguid);
914 case DRR_FREEOBJECTS:
915 DO64(drr_freeobjects.drr_firstobj);
916 DO64(drr_freeobjects.drr_numobjs);
917 DO64(drr_freeobjects.drr_toguid);
920 DO64(drr_write.drr_object);
921 DO32(drr_write.drr_type);
922 DO64(drr_write.drr_offset);
923 DO64(drr_write.drr_length);
924 DO64(drr_write.drr_toguid);
925 DO64(drr_write.drr_key.ddk_cksum.zc_word[0]);
926 DO64(drr_write.drr_key.ddk_cksum.zc_word[1]);
927 DO64(drr_write.drr_key.ddk_cksum.zc_word[2]);
928 DO64(drr_write.drr_key.ddk_cksum.zc_word[3]);
929 DO64(drr_write.drr_key.ddk_prop);
931 case DRR_WRITE_BYREF:
932 DO64(drr_write_byref.drr_object);
933 DO64(drr_write_byref.drr_offset);
934 DO64(drr_write_byref.drr_length);
935 DO64(drr_write_byref.drr_toguid);
936 DO64(drr_write_byref.drr_refguid);
937 DO64(drr_write_byref.drr_refobject);
938 DO64(drr_write_byref.drr_refoffset);
939 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]);
940 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]);
941 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]);
942 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]);
943 DO64(drr_write_byref.drr_key.ddk_prop);
946 DO64(drr_free.drr_object);
947 DO64(drr_free.drr_offset);
948 DO64(drr_free.drr_length);
949 DO64(drr_free.drr_toguid);
952 DO64(drr_spill.drr_object);
953 DO64(drr_spill.drr_length);
954 DO64(drr_spill.drr_toguid);
957 DO64(drr_end.drr_checksum.zc_word[0]);
958 DO64(drr_end.drr_checksum.zc_word[1]);
959 DO64(drr_end.drr_checksum.zc_word[2]);
960 DO64(drr_end.drr_checksum.zc_word[3]);
961 DO64(drr_end.drr_toguid);
971 restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
977 if (drro->drr_type == DMU_OT_NONE ||
978 drro->drr_type >= DMU_OT_NUMTYPES ||
979 drro->drr_bonustype >= DMU_OT_NUMTYPES ||
980 drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
981 drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
982 P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
983 drro->drr_blksz < SPA_MINBLOCKSIZE ||
984 drro->drr_blksz > SPA_MAXBLOCKSIZE ||
985 drro->drr_bonuslen > DN_MAX_BONUSLEN) {
989 err = dmu_object_info(os, drro->drr_object, NULL);
991 if (err != 0 && err != ENOENT)
994 if (drro->drr_bonuslen) {
995 data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
1000 if (err == ENOENT) {
1001 /* currently free, want to be allocated */
1002 tx = dmu_tx_create(os);
1003 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1004 err = dmu_tx_assign(tx, TXG_WAIT);
1009 err = dmu_object_claim(os, drro->drr_object,
1010 drro->drr_type, drro->drr_blksz,
1011 drro->drr_bonustype, drro->drr_bonuslen, tx);
1014 /* currently allocated, want to be allocated */
1015 err = dmu_object_reclaim(os, drro->drr_object,
1016 drro->drr_type, drro->drr_blksz,
1017 drro->drr_bonustype, drro->drr_bonuslen);
1023 tx = dmu_tx_create(os);
1024 dmu_tx_hold_bonus(tx, drro->drr_object);
1025 err = dmu_tx_assign(tx, TXG_WAIT);
1031 dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
1033 dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
1038 VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
1039 dmu_buf_will_dirty(db, tx);
1041 ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
1042 bcopy(data, db->db_data, drro->drr_bonuslen);
1044 dmu_ot[drro->drr_bonustype].ot_byteswap(db->db_data,
1045 drro->drr_bonuslen);
1047 dmu_buf_rele(db, FTAG);
1055 restore_freeobjects(struct restorearg *ra, objset_t *os,
1056 struct drr_freeobjects *drrfo)
1060 if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
1063 for (obj = drrfo->drr_firstobj;
1064 obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
1065 (void) dmu_object_next(os, &obj, FALSE, 0)) {
1068 if (dmu_object_info(os, obj, NULL) != 0)
1071 err = dmu_free_object(os, obj);
1079 restore_write(struct restorearg *ra, objset_t *os,
1080 struct drr_write *drrw)
1086 if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
1087 drrw->drr_type >= DMU_OT_NUMTYPES)
1090 data = restore_read(ra, drrw->drr_length);
1094 if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
1097 tx = dmu_tx_create(os);
1099 dmu_tx_hold_write(tx, drrw->drr_object,
1100 drrw->drr_offset, drrw->drr_length);
1101 err = dmu_tx_assign(tx, TXG_WAIT);
1107 dmu_ot[drrw->drr_type].ot_byteswap(data, drrw->drr_length);
1108 dmu_write(os, drrw->drr_object,
1109 drrw->drr_offset, drrw->drr_length, data, tx);
1115 * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
1116 * streams to refer to a copy of the data that is already on the
1117 * system because it came in earlier in the stream. This function
1118 * finds the earlier copy of the data, and uses that copy instead of
1119 * data from the stream to fulfill this write.
1122 restore_write_byref(struct restorearg *ra, objset_t *os,
1123 struct drr_write_byref *drrwbr)
1127 guid_map_entry_t gmesrch;
1128 guid_map_entry_t *gmep;
1130 objset_t *ref_os = NULL;
1133 if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
1137 * If the GUID of the referenced dataset is different from the
1138 * GUID of the target dataset, find the referenced dataset.
1140 if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
1141 gmesrch.guid = drrwbr->drr_refguid;
1142 if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
1146 if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
1152 err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
1153 drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH);
1157 tx = dmu_tx_create(os);
1159 dmu_tx_hold_write(tx, drrwbr->drr_object,
1160 drrwbr->drr_offset, drrwbr->drr_length);
1161 err = dmu_tx_assign(tx, TXG_WAIT);
1166 dmu_write(os, drrwbr->drr_object,
1167 drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
1168 dmu_buf_rele(dbp, FTAG);
1174 restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
1178 dmu_buf_t *db, *db_spill;
1181 if (drrs->drr_length < SPA_MINBLOCKSIZE ||
1182 drrs->drr_length > SPA_MAXBLOCKSIZE)
1185 data = restore_read(ra, drrs->drr_length);
1189 if (dmu_object_info(os, drrs->drr_object, NULL) != 0)
1192 VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db));
1193 if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
1194 dmu_buf_rele(db, FTAG);
1198 tx = dmu_tx_create(os);
1200 dmu_tx_hold_spill(tx, db->db_object);
1202 err = dmu_tx_assign(tx, TXG_WAIT);
1204 dmu_buf_rele(db, FTAG);
1205 dmu_buf_rele(db_spill, FTAG);
1209 dmu_buf_will_dirty(db_spill, tx);
1211 if (db_spill->db_size < drrs->drr_length)
1212 VERIFY(0 == dbuf_spill_set_blksz(db_spill,
1213 drrs->drr_length, tx));
1214 bcopy(data, db_spill->db_data, drrs->drr_length);
1216 dmu_buf_rele(db, FTAG);
1217 dmu_buf_rele(db_spill, FTAG);
1225 restore_free(struct restorearg *ra, objset_t *os,
1226 struct drr_free *drrf)
1230 if (drrf->drr_length != -1ULL &&
1231 drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
1234 if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
1237 err = dmu_free_long_range(os, drrf->drr_object,
1238 drrf->drr_offset, drrf->drr_length);
1243 * NB: callers *must* call dmu_recv_end() if this succeeds.
1246 dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
1247 int cleanup_fd, uint64_t *action_handlep)
1249 struct restorearg ra = { 0 };
1250 dmu_replay_record_t *drr;
1255 if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
1259 /* compute checksum of drr_begin record */
1260 dmu_replay_record_t *drr;
1261 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
1263 drr->drr_type = DRR_BEGIN;
1264 drr->drr_u.drr_begin = *drc->drc_drrb;
1266 fletcher_4_incremental_byteswap(drr,
1267 sizeof (dmu_replay_record_t), &ra.cksum);
1269 fletcher_4_incremental_native(drr,
1270 sizeof (dmu_replay_record_t), &ra.cksum);
1272 kmem_free(drr, sizeof (dmu_replay_record_t));
1276 struct drr_begin *drrb = drc->drc_drrb;
1277 drrb->drr_magic = BSWAP_64(drrb->drr_magic);
1278 drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
1279 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
1280 drrb->drr_type = BSWAP_32(drrb->drr_type);
1281 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
1282 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
1288 ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP);
1290 /* these were verified in dmu_recv_begin */
1291 ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) ==
1293 ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES);
1296 * Open the objset we are modifying.
1298 VERIFY(dmu_objset_from_ds(drc->drc_real_ds, &os) == 0);
1300 ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
1302 featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
1304 /* if this stream is dedup'ed, set up the avl tree for guid mapping */
1305 if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
1308 if (cleanup_fd == -1) {
1312 ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor);
1318 if (*action_handlep == 0) {
1320 kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
1321 avl_create(ra.guid_to_ds_map, guid_compare,
1322 sizeof (guid_map_entry_t),
1323 offsetof(guid_map_entry_t, avlnode));
1324 ra.err = zfs_onexit_add_cb(minor,
1325 free_guid_map_onexit, ra.guid_to_ds_map,
1330 ra.err = zfs_onexit_cb_data(minor, *action_handlep,
1331 (void **)&ra.guid_to_ds_map);
1336 drc->drc_guid_to_ds_map = ra.guid_to_ds_map;
1340 * Read records and process them.
1343 while (ra.err == 0 &&
1344 NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
1345 if (issig(JUSTLOOKING) && issig(FORREAL)) {
1351 backup_byteswap(drr);
1353 switch (drr->drr_type) {
1357 * We need to make a copy of the record header,
1358 * because restore_{object,write} may need to
1359 * restore_read(), which will invalidate drr.
1361 struct drr_object drro = drr->drr_u.drr_object;
1362 ra.err = restore_object(&ra, os, &drro);
1365 case DRR_FREEOBJECTS:
1367 struct drr_freeobjects drrfo =
1368 drr->drr_u.drr_freeobjects;
1369 ra.err = restore_freeobjects(&ra, os, &drrfo);
1374 struct drr_write drrw = drr->drr_u.drr_write;
1375 ra.err = restore_write(&ra, os, &drrw);
1378 case DRR_WRITE_BYREF:
1380 struct drr_write_byref drrwbr =
1381 drr->drr_u.drr_write_byref;
1382 ra.err = restore_write_byref(&ra, os, &drrwbr);
1387 struct drr_free drrf = drr->drr_u.drr_free;
1388 ra.err = restore_free(&ra, os, &drrf);
1393 struct drr_end drre = drr->drr_u.drr_end;
1395 * We compare against the *previous* checksum
1396 * value, because the stored checksum is of
1397 * everything before the DRR_END record.
1399 if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
1405 struct drr_spill drrs = drr->drr_u.drr_spill;
1406 ra.err = restore_spill(&ra, os, &drrs);
1415 ASSERT(ra.err != 0);
1418 if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
1419 zfs_onexit_fd_rele(cleanup_fd);
1423 * destroy what we created, so we don't leave it in the
1424 * inconsistent restoring state.
1426 txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
1428 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
1430 if (drc->drc_real_ds != drc->drc_logical_ds) {
1431 mutex_exit(&drc->drc_logical_ds->ds_recvlock);
1432 dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag);
1436 vmem_free(ra.buf, ra.bufsize);
1441 struct recvendsyncarg {
1443 uint64_t creation_time;
1448 recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx)
1450 dsl_dataset_t *ds = arg1;
1451 struct recvendsyncarg *resa = arg2;
1453 return (dsl_dataset_snapshot_check(ds, resa->tosnap, tx));
1457 recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx)
1459 dsl_dataset_t *ds = arg1;
1460 struct recvendsyncarg *resa = arg2;
1462 dsl_dataset_snapshot_sync(ds, resa->tosnap, tx);
1464 /* set snapshot's creation time and guid */
1465 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
1466 ds->ds_prev->ds_phys->ds_creation_time = resa->creation_time;
1467 ds->ds_prev->ds_phys->ds_guid = resa->toguid;
1468 ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1470 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1471 ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1475 add_ds_to_guidmap(avl_tree_t *guid_map, dsl_dataset_t *ds)
1477 dsl_pool_t *dp = ds->ds_dir->dd_pool;
1478 uint64_t snapobj = ds->ds_phys->ds_prev_snap_obj;
1479 dsl_dataset_t *snapds;
1480 guid_map_entry_t *gmep;
1483 ASSERT(guid_map != NULL);
1485 rw_enter(&dp->dp_config_rwlock, RW_READER);
1486 err = dsl_dataset_hold_obj(dp, snapobj, guid_map, &snapds);
1488 gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP);
1489 gmep->guid = snapds->ds_phys->ds_guid;
1490 gmep->gme_ds = snapds;
1491 avl_add(guid_map, gmep);
1494 rw_exit(&dp->dp_config_rwlock);
1499 dmu_recv_existing_end(dmu_recv_cookie_t *drc)
1501 struct recvendsyncarg resa;
1502 dsl_dataset_t *ds = drc->drc_logical_ds;
1506 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
1507 * expects it to have a ds_user_ptr (and zil), but clone_swap()
1510 txg_wait_synced(ds->ds_dir->dd_pool, 0);
1512 if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) {
1513 err = dsl_dataset_clone_swap(drc->drc_real_ds, ds,
1518 mutex_exit(&ds->ds_recvlock);
1519 dsl_dataset_rele(ds, dmu_recv_tag);
1520 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
1525 resa.creation_time = drc->drc_drrb->drr_creation_time;
1526 resa.toguid = drc->drc_drrb->drr_toguid;
1527 resa.tosnap = drc->drc_tosnap;
1529 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
1530 recv_end_check, recv_end_sync, ds, &resa, 3);
1533 (void) dsl_dataset_clone_swap(drc->drc_real_ds, ds, B_TRUE);
1537 mutex_exit(&ds->ds_recvlock);
1538 if (err == 0 && drc->drc_guid_to_ds_map != NULL)
1539 (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
1540 dsl_dataset_disown(ds, dmu_recv_tag);
1541 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
1546 dmu_recv_new_end(dmu_recv_cookie_t *drc)
1548 struct recvendsyncarg resa;
1549 dsl_dataset_t *ds = drc->drc_logical_ds;
1553 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
1554 * expects it to have a ds_user_ptr (and zil), but clone_swap()
1557 txg_wait_synced(ds->ds_dir->dd_pool, 0);
1559 resa.creation_time = drc->drc_drrb->drr_creation_time;
1560 resa.toguid = drc->drc_drrb->drr_toguid;
1561 resa.tosnap = drc->drc_tosnap;
1563 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
1564 recv_end_check, recv_end_sync, ds, &resa, 3);
1566 /* clean up the fs we just recv'd into */
1567 (void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE);
1569 if (drc->drc_guid_to_ds_map != NULL)
1570 (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
1571 /* release the hold from dmu_recv_begin */
1572 dsl_dataset_disown(ds, dmu_recv_tag);
1578 dmu_recv_end(dmu_recv_cookie_t *drc)
1580 if (drc->drc_logical_ds != drc->drc_real_ds)
1581 return (dmu_recv_existing_end(drc));
1583 return (dmu_recv_new_end(drc));