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;
77 dump_bytes(struct backuparg *ba, void *buf, int len)
81 ASSERT3U(len % 8, ==, 0);
83 fletcher_4_incremental_native(buf, len, &ba->zc);
89 auio.uio_segflg = UIO_SYSSPACE;
90 auio.uio_rw = UIO_WRITE;
91 auio.uio_offset = (off_t)-1;
94 if (ba->fp->f_type == DTYPE_VNODE)
96 ba->err = fo_write(ba->fp, &auio, ba->td->td_ucred, 0, ba->td);
98 fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__);
106 dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
109 struct drr_free *drrf = &(ba->drr->drr_u.drr_free);
112 * If there is a pending op, but it's not PENDING_FREE, push it out,
113 * since free block aggregation can only be done for blocks of the
114 * same type (i.e., DRR_FREE records can only be aggregated with
115 * other DRR_FREE records. DRR_FREEOBJECTS records can only be
116 * aggregated with other DRR_FREEOBJECTS records.
118 if (ba->pending_op != PENDING_NONE && ba->pending_op != PENDING_FREE) {
119 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
121 ba->pending_op = PENDING_NONE;
124 if (ba->pending_op == PENDING_FREE) {
126 * There should never be a PENDING_FREE if length is -1
127 * (because dump_dnode is the only place where this
128 * function is called with a -1, and only after flushing
129 * any pending record).
131 ASSERT(length != -1ULL);
133 * Check to see whether this free block can be aggregated
136 if (drrf->drr_object == object && drrf->drr_offset +
137 drrf->drr_length == offset) {
138 drrf->drr_length += length;
141 /* not a continuation. Push out pending record */
142 if (dump_bytes(ba, ba->drr,
143 sizeof (dmu_replay_record_t)) != 0)
145 ba->pending_op = PENDING_NONE;
148 /* create a FREE record and make it pending */
149 bzero(ba->drr, sizeof (dmu_replay_record_t));
150 ba->drr->drr_type = DRR_FREE;
151 drrf->drr_object = object;
152 drrf->drr_offset = offset;
153 drrf->drr_length = length;
154 drrf->drr_toguid = ba->toguid;
155 if (length == -1ULL) {
156 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
159 ba->pending_op = PENDING_FREE;
166 dump_data(struct backuparg *ba, dmu_object_type_t type,
167 uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
169 struct drr_write *drrw = &(ba->drr->drr_u.drr_write);
173 * If there is any kind of pending aggregation (currently either
174 * a grouping of free objects or free blocks), push it out to
175 * the stream, since aggregation can't be done across operations
176 * of different types.
178 if (ba->pending_op != PENDING_NONE) {
179 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
181 ba->pending_op = PENDING_NONE;
183 /* write a DATA record */
184 bzero(ba->drr, sizeof (dmu_replay_record_t));
185 ba->drr->drr_type = DRR_WRITE;
186 drrw->drr_object = object;
187 drrw->drr_type = type;
188 drrw->drr_offset = offset;
189 drrw->drr_length = blksz;
190 drrw->drr_toguid = ba->toguid;
191 drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
192 if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
193 drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
194 DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
195 DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
196 DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
197 drrw->drr_key.ddk_cksum = bp->blk_cksum;
199 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
201 if (dump_bytes(ba, data, blksz) != 0)
207 dump_spill(struct backuparg *ba, uint64_t object, int blksz, void *data)
209 struct drr_spill *drrs = &(ba->drr->drr_u.drr_spill);
211 if (ba->pending_op != PENDING_NONE) {
212 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
214 ba->pending_op = PENDING_NONE;
217 /* write a SPILL record */
218 bzero(ba->drr, sizeof (dmu_replay_record_t));
219 ba->drr->drr_type = DRR_SPILL;
220 drrs->drr_object = object;
221 drrs->drr_length = blksz;
222 drrs->drr_toguid = ba->toguid;
224 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
226 if (dump_bytes(ba, data, blksz))
232 dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
234 struct drr_freeobjects *drrfo = &(ba->drr->drr_u.drr_freeobjects);
237 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
238 * push it out, since free block aggregation can only be done for
239 * blocks of the same type (i.e., DRR_FREE records can only be
240 * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
241 * can only be aggregated with other DRR_FREEOBJECTS records.
243 if (ba->pending_op != PENDING_NONE &&
244 ba->pending_op != PENDING_FREEOBJECTS) {
245 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
247 ba->pending_op = PENDING_NONE;
249 if (ba->pending_op == PENDING_FREEOBJECTS) {
251 * See whether this free object array can be aggregated
254 if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
255 drrfo->drr_numobjs += numobjs;
258 /* can't be aggregated. Push out pending record */
259 if (dump_bytes(ba, ba->drr,
260 sizeof (dmu_replay_record_t)) != 0)
262 ba->pending_op = PENDING_NONE;
266 /* write a FREEOBJECTS record */
267 bzero(ba->drr, sizeof (dmu_replay_record_t));
268 ba->drr->drr_type = DRR_FREEOBJECTS;
269 drrfo->drr_firstobj = firstobj;
270 drrfo->drr_numobjs = numobjs;
271 drrfo->drr_toguid = ba->toguid;
273 ba->pending_op = PENDING_FREEOBJECTS;
279 dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
281 struct drr_object *drro = &(ba->drr->drr_u.drr_object);
283 if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
284 return (dump_freeobjects(ba, object, 1));
286 if (ba->pending_op != PENDING_NONE) {
287 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
289 ba->pending_op = PENDING_NONE;
292 /* write an OBJECT record */
293 bzero(ba->drr, sizeof (dmu_replay_record_t));
294 ba->drr->drr_type = DRR_OBJECT;
295 drro->drr_object = object;
296 drro->drr_type = dnp->dn_type;
297 drro->drr_bonustype = dnp->dn_bonustype;
298 drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
299 drro->drr_bonuslen = dnp->dn_bonuslen;
300 drro->drr_checksumtype = dnp->dn_checksum;
301 drro->drr_compress = dnp->dn_compress;
302 drro->drr_toguid = ba->toguid;
304 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
307 if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
310 /* free anything past the end of the file */
311 if (dump_free(ba, object, (dnp->dn_maxblkid + 1) *
312 (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
319 #define BP_SPAN(dnp, level) \
320 (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
321 (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
325 backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
326 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
328 struct backuparg *ba = arg;
329 dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
332 if (issig(JUSTLOOKING) && issig(FORREAL))
335 if (zb->zb_object != DMU_META_DNODE_OBJECT &&
336 DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
338 } else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) {
339 uint64_t span = BP_SPAN(dnp, zb->zb_level);
340 uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
341 err = dump_freeobjects(ba, dnobj, span >> DNODE_SHIFT);
342 } else if (bp == NULL) {
343 uint64_t span = BP_SPAN(dnp, zb->zb_level);
344 err = dump_free(ba, zb->zb_object, zb->zb_blkid * span, span);
345 } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
347 } else if (type == DMU_OT_DNODE) {
350 int blksz = BP_GET_LSIZE(bp);
351 uint32_t aflags = ARC_WAIT;
354 if (dsl_read(NULL, spa, bp, pbuf,
355 arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
356 ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
360 for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
361 uint64_t dnobj = (zb->zb_blkid <<
362 (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
363 err = dump_dnode(ba, dnobj, blk+i);
367 (void) arc_buf_remove_ref(abuf, &abuf);
368 } else if (type == DMU_OT_SA) {
369 uint32_t aflags = ARC_WAIT;
371 int blksz = BP_GET_LSIZE(bp);
373 if (arc_read_nolock(NULL, spa, bp,
374 arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
375 ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
378 err = dump_spill(ba, zb->zb_object, blksz, abuf->b_data);
379 (void) arc_buf_remove_ref(abuf, &abuf);
380 } else { /* it's a level-0 block of a regular object */
381 uint32_t aflags = ARC_WAIT;
383 int blksz = BP_GET_LSIZE(bp);
385 if (dsl_read(NULL, spa, bp, pbuf,
386 arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
387 ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
390 err = dump_data(ba, type, zb->zb_object, zb->zb_blkid * blksz,
391 blksz, bp, abuf->b_data);
392 (void) arc_buf_remove_ref(abuf, &abuf);
395 ASSERT(err == 0 || err == EINTR);
400 dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
401 struct file *fp, offset_t *off)
403 dsl_dataset_t *ds = tosnap->os_dsl_dataset;
404 dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
405 dmu_replay_record_t *drr;
408 uint64_t fromtxg = 0;
410 /* tosnap must be a snapshot */
411 if (ds->ds_phys->ds_next_snap_obj == 0)
414 /* fromsnap must be an earlier snapshot from the same fs as tosnap */
415 if (fromds && (ds->ds_dir != fromds->ds_dir ||
416 fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
420 dsl_pool_t *dp = ds->ds_dir->dd_pool;
425 if (dsl_dir_is_clone(ds->ds_dir)) {
426 rw_enter(&dp->dp_config_rwlock, RW_READER);
427 err = dsl_dataset_hold_obj(dp,
428 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
429 rw_exit(&dp->dp_config_rwlock);
433 fromorigin = B_FALSE;
438 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
439 drr->drr_type = DRR_BEGIN;
440 drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
441 DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
445 if (dmu_objset_type(tosnap) == DMU_OST_ZFS) {
447 if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0)
449 if (version == ZPL_VERSION_SA) {
450 DMU_SET_FEATUREFLAGS(
451 drr->drr_u.drr_begin.drr_versioninfo,
452 DMU_BACKUP_FEATURE_SA_SPILL);
457 drr->drr_u.drr_begin.drr_creation_time =
458 ds->ds_phys->ds_creation_time;
459 drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type;
461 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
462 drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
463 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
464 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
467 drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
468 dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
471 fromtxg = fromds->ds_phys->ds_creation_txg;
473 dsl_dataset_rele(fromds, FTAG);
480 ba.toguid = ds->ds_phys->ds_guid;
481 ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0);
482 ba.pending_op = PENDING_NONE;
484 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
485 kmem_free(drr, sizeof (dmu_replay_record_t));
489 err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
492 if (ba.pending_op != PENDING_NONE)
493 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0)
497 if (err == EINTR && ba.err)
499 kmem_free(drr, sizeof (dmu_replay_record_t));
503 bzero(drr, sizeof (dmu_replay_record_t));
504 drr->drr_type = DRR_END;
505 drr->drr_u.drr_end.drr_checksum = ba.zc;
506 drr->drr_u.drr_end.drr_toguid = ba.toguid;
508 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
509 kmem_free(drr, sizeof (dmu_replay_record_t));
513 kmem_free(drr, sizeof (dmu_replay_record_t));
518 struct recvbeginsyncarg {
521 dsl_dataset_t *origin;
523 dmu_objset_type_t type;
527 char clonelastname[MAXNAMELEN];
528 dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */
534 recv_new_check(void *arg1, void *arg2, dmu_tx_t *tx)
536 dsl_dir_t *dd = arg1;
537 struct recvbeginsyncarg *rbsa = arg2;
538 objset_t *mos = dd->dd_pool->dp_meta_objset;
542 err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
543 strrchr(rbsa->tofs, '/') + 1, sizeof (uint64_t), 1, &val);
546 return (err ? err : EEXIST);
549 /* make sure it's a snap in the same pool */
550 if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool)
552 if (!dsl_dataset_is_snapshot(rbsa->origin))
554 if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
562 recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx)
564 dsl_dir_t *dd = arg1;
565 struct recvbeginsyncarg *rbsa = arg2;
566 uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
569 /* Create and open new dataset. */
570 dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1,
571 rbsa->origin, flags, rbsa->cr, tx);
572 VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj,
573 B_TRUE, dmu_recv_tag, &rbsa->ds));
575 if (rbsa->origin == NULL) {
576 (void) dmu_objset_create_impl(dd->dd_pool->dp_spa,
577 rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx);
580 spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC,
581 dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj);
586 recv_existing_check(void *arg1, void *arg2, dmu_tx_t *tx)
588 dsl_dataset_t *ds = arg1;
589 struct recvbeginsyncarg *rbsa = arg2;
593 /* must not have any changes since most recent snapshot */
594 if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
597 /* new snapshot name must not exist */
598 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
599 ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val);
605 if (rbsa->fromguid) {
606 /* if incremental, most recent snapshot must match fromguid */
607 if (ds->ds_prev == NULL)
611 * most recent snapshot must match fromguid, or there are no
612 * changes since the fromguid one
614 if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) {
615 uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth;
616 uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj;
619 err = dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
623 if (snap->ds_phys->ds_creation_txg < birth) {
624 dsl_dataset_rele(snap, FTAG);
627 if (snap->ds_phys->ds_guid == rbsa->fromguid) {
628 dsl_dataset_rele(snap, FTAG);
631 obj = snap->ds_phys->ds_prev_snap_obj;
632 dsl_dataset_rele(snap, FTAG);
638 /* if full, most recent snapshot must be $ORIGIN */
639 if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL)
643 /* temporary clone name must not exist */
644 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
645 ds->ds_dir->dd_phys->dd_child_dir_zapobj,
646 rbsa->clonelastname, 8, 1, &val);
657 recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx)
659 dsl_dataset_t *ohds = arg1;
660 struct recvbeginsyncarg *rbsa = arg2;
661 dsl_pool_t *dp = ohds->ds_dir->dd_pool;
663 uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
666 /* create and open the temporary clone */
667 dsobj = dsl_dataset_create_sync(ohds->ds_dir, rbsa->clonelastname,
668 ohds->ds_prev, flags, rbsa->cr, tx);
669 VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, B_TRUE, dmu_recv_tag, &cds));
672 * If we actually created a non-clone, we need to create the
673 * objset in our new dataset.
675 if (BP_IS_HOLE(dsl_dataset_get_blkptr(cds))) {
676 (void) dmu_objset_create_impl(dp->dp_spa,
677 cds, dsl_dataset_get_blkptr(cds), rbsa->type, tx);
682 spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC,
683 dp->dp_spa, tx, "dataset = %lld", dsobj);
687 dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb)
691 featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
693 /* Verify pool version supports SA if SA_SPILL feature set */
694 return ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
695 (spa_version(dsl_dataset_get_spa(ds)) < SPA_VERSION_SA));
699 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
700 * succeeds; otherwise we will leak the holds on the datasets.
703 dmu_recv_begin(char *tofs, char *tosnap, char *top_ds, struct drr_begin *drrb,
704 boolean_t force, objset_t *origin, dmu_recv_cookie_t *drc)
708 struct recvbeginsyncarg rbsa = { 0 };
709 uint64_t versioninfo;
713 if (drrb->drr_magic == DMU_BACKUP_MAGIC)
715 else if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
721 rbsa.tosnap = tosnap;
722 rbsa.origin = origin ? origin->os_dsl_dataset : NULL;
723 rbsa.fromguid = drrb->drr_fromguid;
724 rbsa.type = drrb->drr_type;
728 versioninfo = drrb->drr_versioninfo;
729 flags = drrb->drr_flags;
732 rbsa.type = BSWAP_32(rbsa.type);
733 rbsa.fromguid = BSWAP_64(rbsa.fromguid);
734 versioninfo = BSWAP_64(versioninfo);
735 flags = BSWAP_32(flags);
738 if (DMU_GET_STREAM_HDRTYPE(versioninfo) == DMU_COMPOUNDSTREAM ||
739 rbsa.type >= DMU_OST_NUMTYPES ||
740 ((flags & DRR_FLAG_CLONE) && origin == NULL))
743 if (flags & DRR_FLAG_CI_DATA)
744 rbsa.dsflags = DS_FLAG_CI_DATASET;
746 bzero(drc, sizeof (dmu_recv_cookie_t));
747 drc->drc_drrb = drrb;
748 drc->drc_tosnap = tosnap;
749 drc->drc_top_ds = top_ds;
750 drc->drc_force = force;
753 * Process the begin in syncing context.
756 /* open the dataset we are logically receiving into */
757 err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds);
759 if (dmu_recv_verify_features(ds, drrb)) {
760 dsl_dataset_rele(ds, dmu_recv_tag);
763 /* target fs already exists; recv into temp clone */
765 /* Can't recv a clone into an existing fs */
766 if (flags & DRR_FLAG_CLONE) {
767 dsl_dataset_rele(ds, dmu_recv_tag);
771 /* must not have an incremental recv already in progress */
772 if (!mutex_tryenter(&ds->ds_recvlock)) {
773 dsl_dataset_rele(ds, dmu_recv_tag);
777 /* tmp clone name is: tofs/%tosnap" */
778 (void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname),
781 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
782 recv_existing_check, recv_existing_sync, ds, &rbsa, 5);
784 mutex_exit(&ds->ds_recvlock);
785 dsl_dataset_rele(ds, dmu_recv_tag);
788 drc->drc_logical_ds = ds;
789 drc->drc_real_ds = rbsa.ds;
790 } else if (err == ENOENT) {
791 /* target fs does not exist; must be a full backup or clone */
795 * If it's a non-clone incremental, we are missing the
796 * target fs, so fail the recv.
798 if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE))
801 /* Open the parent of tofs */
802 cp = strrchr(tofs, '/');
804 err = dsl_dataset_hold(tofs, FTAG, &ds);
809 if (dmu_recv_verify_features(ds, drrb)) {
810 dsl_dataset_rele(ds, FTAG);
814 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
815 recv_new_check, recv_new_sync, ds->ds_dir, &rbsa, 5);
816 dsl_dataset_rele(ds, FTAG);
819 drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds;
820 drc->drc_newfs = B_TRUE;
833 int bufsize; /* amount of memory allocated for buf */
835 avl_tree_t *guid_to_ds_map;
838 typedef struct guid_map_entry {
840 dsl_dataset_t *gme_ds;
845 guid_compare(const void *arg1, const void *arg2)
847 const guid_map_entry_t *gmep1 = arg1;
848 const guid_map_entry_t *gmep2 = arg2;
850 if (gmep1->guid < gmep2->guid)
852 else if (gmep1->guid > gmep2->guid)
858 free_guid_map_onexit(void *arg)
860 avl_tree_t *ca = arg;
862 guid_map_entry_t *gmep;
864 while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
865 dsl_dataset_rele(gmep->gme_ds, ca);
866 kmem_free(gmep, sizeof (guid_map_entry_t));
869 kmem_free(ca, sizeof (avl_tree_t));
873 restore_bytes(struct restorearg *ra, void *buf, int len, off_t off, ssize_t *resid)
881 auio.uio_iov = &aiov;
883 auio.uio_resid = len;
884 auio.uio_segflg = UIO_SYSSPACE;
885 auio.uio_rw = UIO_READ;
886 auio.uio_offset = off;
887 auio.uio_td = ra->td;
889 error = fo_read(ra->fp, &auio, ra->td->td_ucred, FOF_OFFSET, ra->td);
891 fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__);
894 *resid = auio.uio_resid;
899 restore_read(struct restorearg *ra, int len)
904 /* some things will require 8-byte alignment, so everything must */
905 ASSERT3U(len % 8, ==, 0);
910 ra->err = restore_bytes(ra, (caddr_t)ra->buf + done,
911 len - done, ra->voff, &resid);
913 if (resid == len - done)
915 ra->voff += len - done - resid;
921 ASSERT3U(done, ==, len);
924 fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
926 fletcher_4_incremental_native(rv, len, &ra->cksum);
931 backup_byteswap(dmu_replay_record_t *drr)
933 #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
934 #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
935 drr->drr_type = BSWAP_32(drr->drr_type);
936 drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
937 switch (drr->drr_type) {
939 DO64(drr_begin.drr_magic);
940 DO64(drr_begin.drr_versioninfo);
941 DO64(drr_begin.drr_creation_time);
942 DO32(drr_begin.drr_type);
943 DO32(drr_begin.drr_flags);
944 DO64(drr_begin.drr_toguid);
945 DO64(drr_begin.drr_fromguid);
948 DO64(drr_object.drr_object);
949 /* DO64(drr_object.drr_allocation_txg); */
950 DO32(drr_object.drr_type);
951 DO32(drr_object.drr_bonustype);
952 DO32(drr_object.drr_blksz);
953 DO32(drr_object.drr_bonuslen);
954 DO64(drr_object.drr_toguid);
956 case DRR_FREEOBJECTS:
957 DO64(drr_freeobjects.drr_firstobj);
958 DO64(drr_freeobjects.drr_numobjs);
959 DO64(drr_freeobjects.drr_toguid);
962 DO64(drr_write.drr_object);
963 DO32(drr_write.drr_type);
964 DO64(drr_write.drr_offset);
965 DO64(drr_write.drr_length);
966 DO64(drr_write.drr_toguid);
967 DO64(drr_write.drr_key.ddk_cksum.zc_word[0]);
968 DO64(drr_write.drr_key.ddk_cksum.zc_word[1]);
969 DO64(drr_write.drr_key.ddk_cksum.zc_word[2]);
970 DO64(drr_write.drr_key.ddk_cksum.zc_word[3]);
971 DO64(drr_write.drr_key.ddk_prop);
973 case DRR_WRITE_BYREF:
974 DO64(drr_write_byref.drr_object);
975 DO64(drr_write_byref.drr_offset);
976 DO64(drr_write_byref.drr_length);
977 DO64(drr_write_byref.drr_toguid);
978 DO64(drr_write_byref.drr_refguid);
979 DO64(drr_write_byref.drr_refobject);
980 DO64(drr_write_byref.drr_refoffset);
981 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]);
982 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]);
983 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]);
984 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]);
985 DO64(drr_write_byref.drr_key.ddk_prop);
988 DO64(drr_free.drr_object);
989 DO64(drr_free.drr_offset);
990 DO64(drr_free.drr_length);
991 DO64(drr_free.drr_toguid);
994 DO64(drr_spill.drr_object);
995 DO64(drr_spill.drr_length);
996 DO64(drr_spill.drr_toguid);
999 DO64(drr_end.drr_checksum.zc_word[0]);
1000 DO64(drr_end.drr_checksum.zc_word[1]);
1001 DO64(drr_end.drr_checksum.zc_word[2]);
1002 DO64(drr_end.drr_checksum.zc_word[3]);
1003 DO64(drr_end.drr_toguid);
1011 restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
1017 if (drro->drr_type == DMU_OT_NONE ||
1018 drro->drr_type >= DMU_OT_NUMTYPES ||
1019 drro->drr_bonustype >= DMU_OT_NUMTYPES ||
1020 drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
1021 drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
1022 P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
1023 drro->drr_blksz < SPA_MINBLOCKSIZE ||
1024 drro->drr_blksz > SPA_MAXBLOCKSIZE ||
1025 drro->drr_bonuslen > DN_MAX_BONUSLEN) {
1029 err = dmu_object_info(os, drro->drr_object, NULL);
1031 if (err != 0 && err != ENOENT)
1034 if (drro->drr_bonuslen) {
1035 data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
1040 if (err == ENOENT) {
1041 /* currently free, want to be allocated */
1042 tx = dmu_tx_create(os);
1043 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1044 err = dmu_tx_assign(tx, TXG_WAIT);
1049 err = dmu_object_claim(os, drro->drr_object,
1050 drro->drr_type, drro->drr_blksz,
1051 drro->drr_bonustype, drro->drr_bonuslen, tx);
1054 /* currently allocated, want to be allocated */
1055 err = dmu_object_reclaim(os, drro->drr_object,
1056 drro->drr_type, drro->drr_blksz,
1057 drro->drr_bonustype, drro->drr_bonuslen);
1063 tx = dmu_tx_create(os);
1064 dmu_tx_hold_bonus(tx, drro->drr_object);
1065 err = dmu_tx_assign(tx, TXG_WAIT);
1071 dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
1073 dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
1078 VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
1079 dmu_buf_will_dirty(db, tx);
1081 ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
1082 bcopy(data, db->db_data, drro->drr_bonuslen);
1084 dmu_ot[drro->drr_bonustype].ot_byteswap(db->db_data,
1085 drro->drr_bonuslen);
1087 dmu_buf_rele(db, FTAG);
1095 restore_freeobjects(struct restorearg *ra, objset_t *os,
1096 struct drr_freeobjects *drrfo)
1100 if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
1103 for (obj = drrfo->drr_firstobj;
1104 obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
1105 (void) dmu_object_next(os, &obj, FALSE, 0)) {
1108 if (dmu_object_info(os, obj, NULL) != 0)
1111 err = dmu_free_object(os, obj);
1119 restore_write(struct restorearg *ra, objset_t *os,
1120 struct drr_write *drrw)
1126 if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
1127 drrw->drr_type >= DMU_OT_NUMTYPES)
1130 data = restore_read(ra, drrw->drr_length);
1134 if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
1137 tx = dmu_tx_create(os);
1139 dmu_tx_hold_write(tx, drrw->drr_object,
1140 drrw->drr_offset, drrw->drr_length);
1141 err = dmu_tx_assign(tx, TXG_WAIT);
1147 dmu_ot[drrw->drr_type].ot_byteswap(data, drrw->drr_length);
1148 dmu_write(os, drrw->drr_object,
1149 drrw->drr_offset, drrw->drr_length, data, tx);
1155 * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
1156 * streams to refer to a copy of the data that is already on the
1157 * system because it came in earlier in the stream. This function
1158 * finds the earlier copy of the data, and uses that copy instead of
1159 * data from the stream to fulfill this write.
1162 restore_write_byref(struct restorearg *ra, objset_t *os,
1163 struct drr_write_byref *drrwbr)
1167 guid_map_entry_t gmesrch;
1168 guid_map_entry_t *gmep;
1170 objset_t *ref_os = NULL;
1173 if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
1177 * If the GUID of the referenced dataset is different from the
1178 * GUID of the target dataset, find the referenced dataset.
1180 if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
1181 gmesrch.guid = drrwbr->drr_refguid;
1182 if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
1186 if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
1192 if (err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
1193 drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH))
1196 tx = dmu_tx_create(os);
1198 dmu_tx_hold_write(tx, drrwbr->drr_object,
1199 drrwbr->drr_offset, drrwbr->drr_length);
1200 err = dmu_tx_assign(tx, TXG_WAIT);
1205 dmu_write(os, drrwbr->drr_object,
1206 drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
1207 dmu_buf_rele(dbp, FTAG);
1213 restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
1217 dmu_buf_t *db, *db_spill;
1220 if (drrs->drr_length < SPA_MINBLOCKSIZE ||
1221 drrs->drr_length > SPA_MAXBLOCKSIZE)
1224 data = restore_read(ra, drrs->drr_length);
1228 if (dmu_object_info(os, drrs->drr_object, NULL) != 0)
1231 VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db));
1232 if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
1233 dmu_buf_rele(db, FTAG);
1237 tx = dmu_tx_create(os);
1239 dmu_tx_hold_spill(tx, db->db_object);
1241 err = dmu_tx_assign(tx, TXG_WAIT);
1243 dmu_buf_rele(db, FTAG);
1244 dmu_buf_rele(db_spill, FTAG);
1248 dmu_buf_will_dirty(db_spill, tx);
1250 if (db_spill->db_size < drrs->drr_length)
1251 VERIFY(0 == dbuf_spill_set_blksz(db_spill,
1252 drrs->drr_length, tx));
1253 bcopy(data, db_spill->db_data, drrs->drr_length);
1255 dmu_buf_rele(db, FTAG);
1256 dmu_buf_rele(db_spill, FTAG);
1264 restore_free(struct restorearg *ra, objset_t *os,
1265 struct drr_free *drrf)
1269 if (drrf->drr_length != -1ULL &&
1270 drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
1273 if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
1276 err = dmu_free_long_range(os, drrf->drr_object,
1277 drrf->drr_offset, drrf->drr_length);
1282 * NB: callers *must* call dmu_recv_end() if this succeeds.
1285 dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp,
1286 int cleanup_fd, uint64_t *action_handlep)
1288 struct restorearg ra = { 0 };
1289 dmu_replay_record_t *drr;
1294 if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
1298 /* compute checksum of drr_begin record */
1299 dmu_replay_record_t *drr;
1300 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
1302 drr->drr_type = DRR_BEGIN;
1303 drr->drr_u.drr_begin = *drc->drc_drrb;
1305 fletcher_4_incremental_byteswap(drr,
1306 sizeof (dmu_replay_record_t), &ra.cksum);
1308 fletcher_4_incremental_native(drr,
1309 sizeof (dmu_replay_record_t), &ra.cksum);
1311 kmem_free(drr, sizeof (dmu_replay_record_t));
1315 struct drr_begin *drrb = drc->drc_drrb;
1316 drrb->drr_magic = BSWAP_64(drrb->drr_magic);
1317 drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
1318 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
1319 drrb->drr_type = BSWAP_32(drrb->drr_type);
1320 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
1321 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
1328 ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
1330 /* these were verified in dmu_recv_begin */
1331 ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) ==
1333 ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES);
1336 * Open the objset we are modifying.
1338 VERIFY(dmu_objset_from_ds(drc->drc_real_ds, &os) == 0);
1340 ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
1342 featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
1344 /* if this stream is dedup'ed, set up the avl tree for guid mapping */
1345 if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
1348 if (cleanup_fd == -1) {
1352 ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor);
1358 if (*action_handlep == 0) {
1360 kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
1361 avl_create(ra.guid_to_ds_map, guid_compare,
1362 sizeof (guid_map_entry_t),
1363 offsetof(guid_map_entry_t, avlnode));
1364 ra.err = zfs_onexit_add_cb(minor,
1365 free_guid_map_onexit, ra.guid_to_ds_map,
1370 ra.err = zfs_onexit_cb_data(minor, *action_handlep,
1371 (void **)&ra.guid_to_ds_map);
1376 drc->drc_guid_to_ds_map = ra.guid_to_ds_map;
1380 * Read records and process them.
1383 while (ra.err == 0 &&
1384 NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
1385 if (issig(JUSTLOOKING) && issig(FORREAL)) {
1391 backup_byteswap(drr);
1393 switch (drr->drr_type) {
1397 * We need to make a copy of the record header,
1398 * because restore_{object,write} may need to
1399 * restore_read(), which will invalidate drr.
1401 struct drr_object drro = drr->drr_u.drr_object;
1402 ra.err = restore_object(&ra, os, &drro);
1405 case DRR_FREEOBJECTS:
1407 struct drr_freeobjects drrfo =
1408 drr->drr_u.drr_freeobjects;
1409 ra.err = restore_freeobjects(&ra, os, &drrfo);
1414 struct drr_write drrw = drr->drr_u.drr_write;
1415 ra.err = restore_write(&ra, os, &drrw);
1418 case DRR_WRITE_BYREF:
1420 struct drr_write_byref drrwbr =
1421 drr->drr_u.drr_write_byref;
1422 ra.err = restore_write_byref(&ra, os, &drrwbr);
1427 struct drr_free drrf = drr->drr_u.drr_free;
1428 ra.err = restore_free(&ra, os, &drrf);
1433 struct drr_end drre = drr->drr_u.drr_end;
1435 * We compare against the *previous* checksum
1436 * value, because the stored checksum is of
1437 * everything before the DRR_END record.
1439 if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
1445 struct drr_spill drrs = drr->drr_u.drr_spill;
1446 ra.err = restore_spill(&ra, os, &drrs);
1455 ASSERT(ra.err != 0);
1458 if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
1459 zfs_onexit_fd_rele(cleanup_fd);
1463 * destroy what we created, so we don't leave it in the
1464 * inconsistent restoring state.
1466 txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
1468 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
1470 if (drc->drc_real_ds != drc->drc_logical_ds) {
1471 mutex_exit(&drc->drc_logical_ds->ds_recvlock);
1472 dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag);
1476 kmem_free(ra.buf, ra.bufsize);
1481 struct recvendsyncarg {
1483 uint64_t creation_time;
1488 recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx)
1490 dsl_dataset_t *ds = arg1;
1491 struct recvendsyncarg *resa = arg2;
1493 return (dsl_dataset_snapshot_check(ds, resa->tosnap, tx));
1497 recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx)
1499 dsl_dataset_t *ds = arg1;
1500 struct recvendsyncarg *resa = arg2;
1502 dsl_dataset_snapshot_sync(ds, resa->tosnap, tx);
1504 /* set snapshot's creation time and guid */
1505 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
1506 ds->ds_prev->ds_phys->ds_creation_time = resa->creation_time;
1507 ds->ds_prev->ds_phys->ds_guid = resa->toguid;
1508 ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1510 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1511 ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1515 add_ds_to_guidmap(avl_tree_t *guid_map, dsl_dataset_t *ds)
1517 dsl_pool_t *dp = ds->ds_dir->dd_pool;
1518 uint64_t snapobj = ds->ds_phys->ds_prev_snap_obj;
1519 dsl_dataset_t *snapds;
1520 guid_map_entry_t *gmep;
1523 ASSERT(guid_map != NULL);
1525 rw_enter(&dp->dp_config_rwlock, RW_READER);
1526 err = dsl_dataset_hold_obj(dp, snapobj, guid_map, &snapds);
1528 gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP);
1529 gmep->guid = snapds->ds_phys->ds_guid;
1530 gmep->gme_ds = snapds;
1531 avl_add(guid_map, gmep);
1534 rw_exit(&dp->dp_config_rwlock);
1539 dmu_recv_existing_end(dmu_recv_cookie_t *drc)
1541 struct recvendsyncarg resa;
1542 dsl_dataset_t *ds = drc->drc_logical_ds;
1546 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
1547 * expects it to have a ds_user_ptr (and zil), but clone_swap()
1550 txg_wait_synced(ds->ds_dir->dd_pool, 0);
1552 if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) {
1553 err = dsl_dataset_clone_swap(drc->drc_real_ds, ds,
1558 mutex_exit(&ds->ds_recvlock);
1559 dsl_dataset_rele(ds, dmu_recv_tag);
1560 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
1565 resa.creation_time = drc->drc_drrb->drr_creation_time;
1566 resa.toguid = drc->drc_drrb->drr_toguid;
1567 resa.tosnap = drc->drc_tosnap;
1569 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
1570 recv_end_check, recv_end_sync, ds, &resa, 3);
1573 (void) dsl_dataset_clone_swap(drc->drc_real_ds, ds, B_TRUE);
1577 mutex_exit(&ds->ds_recvlock);
1578 if (err == 0 && drc->drc_guid_to_ds_map != NULL)
1579 (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
1580 dsl_dataset_disown(ds, dmu_recv_tag);
1581 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
1586 dmu_recv_new_end(dmu_recv_cookie_t *drc)
1588 struct recvendsyncarg resa;
1589 dsl_dataset_t *ds = drc->drc_logical_ds;
1593 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
1594 * expects it to have a ds_user_ptr (and zil), but clone_swap()
1597 txg_wait_synced(ds->ds_dir->dd_pool, 0);
1599 resa.creation_time = drc->drc_drrb->drr_creation_time;
1600 resa.toguid = drc->drc_drrb->drr_toguid;
1601 resa.tosnap = drc->drc_tosnap;
1603 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
1604 recv_end_check, recv_end_sync, ds, &resa, 3);
1606 /* clean up the fs we just recv'd into */
1607 (void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE);
1609 if (drc->drc_guid_to_ds_map != NULL)
1610 (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
1611 /* release the hold from dmu_recv_begin */
1612 dsl_dataset_disown(ds, dmu_recv_tag);
1618 dmu_recv_end(dmu_recv_cookie_t *drc)
1620 if (drc->drc_logical_ds != drc->drc_real_ds)
1621 return (dmu_recv_existing_end(drc));
1623 return (dmu_recv_new_end(drc));