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) 2011 by Delphix. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. 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>
52 /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
53 int zfs_send_corrupt_data = B_FALSE;
55 static char *dmu_recv_tag = "dmu_recv_tag";
57 typedef struct dump_bytes_io {
58 dmu_sendarg_t *dbi_dsp;
64 dump_bytes_strategy(void *arg)
66 dump_bytes_io_t *dbi = (dump_bytes_io_t *)arg;
67 dmu_sendarg_t *dsp = dbi->dbi_dsp;
68 dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset;
69 ssize_t resid; /* have to get resid to get detailed errno */
70 ASSERT0(dbi->dbi_len % 8);
72 fletcher_4_incremental_native(dbi->dbi_buf, dbi->dbi_len, &dsp->dsa_zc);
73 dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
74 (caddr_t)dbi->dbi_buf, dbi->dbi_len,
75 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
77 mutex_enter(&ds->ds_sendstream_lock);
78 *dsp->dsa_off += dbi->dbi_len;
79 mutex_exit(&ds->ds_sendstream_lock);
83 dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
92 * The vn_rdwr() call is performed in a taskq to ensure that there is
93 * always enough stack space to write safely to the target filesystem.
94 * The ZIO_TYPE_FREE threads are used because there can be a lot of
95 * them and they are used in vdev_file.c for a similar purpose.
97 spa_taskq_dispatch_sync(dmu_objset_spa(dsp->dsa_os), ZIO_TYPE_FREE,
98 ZIO_TASKQ_ISSUE, dump_bytes_strategy, &dbi, TQ_SLEEP);
100 return (dsp->dsa_err);
104 dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
107 struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free);
109 if (length != -1ULL && offset + length < offset)
113 * If there is a pending op, but it's not PENDING_FREE, push it out,
114 * since free block aggregation can only be done for blocks of the
115 * same type (i.e., DRR_FREE records can only be aggregated with
116 * other DRR_FREE records. DRR_FREEOBJECTS records can only be
117 * aggregated with other DRR_FREEOBJECTS records.
119 if (dsp->dsa_pending_op != PENDING_NONE &&
120 dsp->dsa_pending_op != PENDING_FREE) {
121 if (dump_bytes(dsp, dsp->dsa_drr,
122 sizeof (dmu_replay_record_t)) != 0)
124 dsp->dsa_pending_op = PENDING_NONE;
127 if (dsp->dsa_pending_op == PENDING_FREE) {
129 * There should never be a PENDING_FREE if length is -1
130 * (because dump_dnode is the only place where this
131 * function is called with a -1, and only after flushing
132 * any pending record).
134 ASSERT(length != -1ULL);
136 * Check to see whether this free block can be aggregated
139 if (drrf->drr_object == object && drrf->drr_offset +
140 drrf->drr_length == offset) {
141 drrf->drr_length += length;
144 /* not a continuation. Push out pending record */
145 if (dump_bytes(dsp, dsp->dsa_drr,
146 sizeof (dmu_replay_record_t)) != 0)
148 dsp->dsa_pending_op = PENDING_NONE;
151 /* create a FREE record and make it pending */
152 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
153 dsp->dsa_drr->drr_type = DRR_FREE;
154 drrf->drr_object = object;
155 drrf->drr_offset = offset;
156 drrf->drr_length = length;
157 drrf->drr_toguid = dsp->dsa_toguid;
158 if (length == -1ULL) {
159 if (dump_bytes(dsp, dsp->dsa_drr,
160 sizeof (dmu_replay_record_t)) != 0)
163 dsp->dsa_pending_op = PENDING_FREE;
170 dump_data(dmu_sendarg_t *dsp, dmu_object_type_t type,
171 uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
173 struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write);
177 * If there is any kind of pending aggregation (currently either
178 * a grouping of free objects or free blocks), push it out to
179 * the stream, since aggregation can't be done across operations
180 * of different types.
182 if (dsp->dsa_pending_op != PENDING_NONE) {
183 if (dump_bytes(dsp, dsp->dsa_drr,
184 sizeof (dmu_replay_record_t)) != 0)
186 dsp->dsa_pending_op = PENDING_NONE;
188 /* write a DATA record */
189 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
190 dsp->dsa_drr->drr_type = DRR_WRITE;
191 drrw->drr_object = object;
192 drrw->drr_type = type;
193 drrw->drr_offset = offset;
194 drrw->drr_length = blksz;
195 drrw->drr_toguid = dsp->dsa_toguid;
196 drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
197 if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
198 drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
199 DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
200 DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
201 DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
202 drrw->drr_key.ddk_cksum = bp->blk_cksum;
204 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
206 if (dump_bytes(dsp, data, blksz) != 0)
212 dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data)
214 struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
216 if (dsp->dsa_pending_op != PENDING_NONE) {
217 if (dump_bytes(dsp, dsp->dsa_drr,
218 sizeof (dmu_replay_record_t)) != 0)
220 dsp->dsa_pending_op = PENDING_NONE;
223 /* write a SPILL record */
224 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
225 dsp->dsa_drr->drr_type = DRR_SPILL;
226 drrs->drr_object = object;
227 drrs->drr_length = blksz;
228 drrs->drr_toguid = dsp->dsa_toguid;
230 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)))
232 if (dump_bytes(dsp, data, blksz))
238 dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs)
240 struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects);
243 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
244 * push it out, since free block aggregation can only be done for
245 * blocks of the same type (i.e., DRR_FREE records can only be
246 * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
247 * can only be aggregated with other DRR_FREEOBJECTS records.
249 if (dsp->dsa_pending_op != PENDING_NONE &&
250 dsp->dsa_pending_op != PENDING_FREEOBJECTS) {
251 if (dump_bytes(dsp, dsp->dsa_drr,
252 sizeof (dmu_replay_record_t)) != 0)
254 dsp->dsa_pending_op = PENDING_NONE;
256 if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) {
258 * See whether this free object array can be aggregated
261 if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
262 drrfo->drr_numobjs += numobjs;
265 /* can't be aggregated. Push out pending record */
266 if (dump_bytes(dsp, dsp->dsa_drr,
267 sizeof (dmu_replay_record_t)) != 0)
269 dsp->dsa_pending_op = PENDING_NONE;
273 /* write a FREEOBJECTS record */
274 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
275 dsp->dsa_drr->drr_type = DRR_FREEOBJECTS;
276 drrfo->drr_firstobj = firstobj;
277 drrfo->drr_numobjs = numobjs;
278 drrfo->drr_toguid = dsp->dsa_toguid;
280 dsp->dsa_pending_op = PENDING_FREEOBJECTS;
286 dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp)
288 struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object);
290 if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
291 return (dump_freeobjects(dsp, object, 1));
293 if (dsp->dsa_pending_op != PENDING_NONE) {
294 if (dump_bytes(dsp, dsp->dsa_drr,
295 sizeof (dmu_replay_record_t)) != 0)
297 dsp->dsa_pending_op = PENDING_NONE;
300 /* write an OBJECT record */
301 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
302 dsp->dsa_drr->drr_type = DRR_OBJECT;
303 drro->drr_object = object;
304 drro->drr_type = dnp->dn_type;
305 drro->drr_bonustype = dnp->dn_bonustype;
306 drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
307 drro->drr_bonuslen = dnp->dn_bonuslen;
308 drro->drr_checksumtype = dnp->dn_checksum;
309 drro->drr_compress = dnp->dn_compress;
310 drro->drr_toguid = dsp->dsa_toguid;
312 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
315 if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
318 /* free anything past the end of the file */
319 if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) *
320 (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
327 #define BP_SPAN(dnp, level) \
328 (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
329 (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
333 backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
334 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
336 dmu_sendarg_t *dsp = arg;
337 dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
340 if (issig(JUSTLOOKING) && issig(FORREAL))
343 if (zb->zb_object != DMU_META_DNODE_OBJECT &&
344 DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
346 } else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) {
347 uint64_t span = BP_SPAN(dnp, zb->zb_level);
348 uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
349 err = dump_freeobjects(dsp, dnobj, span >> DNODE_SHIFT);
350 } else if (bp == NULL) {
351 uint64_t span = BP_SPAN(dnp, zb->zb_level);
352 err = dump_free(dsp, zb->zb_object, zb->zb_blkid * span, span);
353 } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
355 } else if (type == DMU_OT_DNODE) {
358 int blksz = BP_GET_LSIZE(bp);
359 uint32_t aflags = ARC_WAIT;
362 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
363 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
368 for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
369 uint64_t dnobj = (zb->zb_blkid <<
370 (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
371 err = dump_dnode(dsp, dnobj, blk+i);
375 (void) arc_buf_remove_ref(abuf, &abuf);
376 } else if (type == DMU_OT_SA) {
377 uint32_t aflags = ARC_WAIT;
379 int blksz = BP_GET_LSIZE(bp);
381 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
382 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
386 err = dump_spill(dsp, zb->zb_object, blksz, abuf->b_data);
387 (void) arc_buf_remove_ref(abuf, &abuf);
388 } else { /* it's a level-0 block of a regular object */
389 uint32_t aflags = ARC_WAIT;
391 int blksz = BP_GET_LSIZE(bp);
393 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
394 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
396 if (zfs_send_corrupt_data) {
398 /* Send a block filled with 0x"zfs badd bloc" */
399 abuf = arc_buf_alloc(spa, blksz, &abuf,
401 for (ptr = abuf->b_data;
402 (char *)ptr < (char *)abuf->b_data + blksz;
404 *ptr = 0x2f5baddb10cULL;
410 err = dump_data(dsp, type, zb->zb_object, zb->zb_blkid * blksz,
411 blksz, bp, abuf->b_data);
412 (void) arc_buf_remove_ref(abuf, &abuf);
415 ASSERT(err == 0 || err == EINTR);
420 dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
421 int outfd, vnode_t *vp, offset_t *off)
423 dsl_dataset_t *ds = tosnap->os_dsl_dataset;
424 dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
425 dmu_replay_record_t *drr;
428 uint64_t fromtxg = 0;
430 /* tosnap must be a snapshot */
431 if (ds->ds_phys->ds_next_snap_obj == 0)
434 /* fromsnap must be an earlier snapshot from the same fs as tosnap */
435 if (fromds && (ds->ds_dir != fromds->ds_dir ||
436 fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
440 dsl_pool_t *dp = ds->ds_dir->dd_pool;
445 if (dsl_dir_is_clone(ds->ds_dir)) {
446 rw_enter(&dp->dp_config_rwlock, RW_READER);
447 err = dsl_dataset_hold_obj(dp,
448 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
449 rw_exit(&dp->dp_config_rwlock);
453 fromorigin = B_FALSE;
458 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
459 drr->drr_type = DRR_BEGIN;
460 drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
461 DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
465 if (dmu_objset_type(tosnap) == DMU_OST_ZFS) {
467 if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0) {
468 kmem_free(drr, sizeof (dmu_replay_record_t));
471 if (version == ZPL_VERSION_SA) {
472 DMU_SET_FEATUREFLAGS(
473 drr->drr_u.drr_begin.drr_versioninfo,
474 DMU_BACKUP_FEATURE_SA_SPILL);
479 drr->drr_u.drr_begin.drr_creation_time =
480 ds->ds_phys->ds_creation_time;
481 drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type;
483 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
484 drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
485 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
486 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
489 drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
490 dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
493 fromtxg = fromds->ds_phys->ds_creation_txg;
495 dsl_dataset_rele(fromds, FTAG);
497 dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP);
501 dsp->dsa_outfd = outfd;
502 dsp->dsa_proc = curproc;
503 dsp->dsa_os = tosnap;
505 dsp->dsa_toguid = ds->ds_phys->ds_guid;
506 ZIO_SET_CHECKSUM(&dsp->dsa_zc, 0, 0, 0, 0);
507 dsp->dsa_pending_op = PENDING_NONE;
509 mutex_enter(&ds->ds_sendstream_lock);
510 list_insert_head(&ds->ds_sendstreams, dsp);
511 mutex_exit(&ds->ds_sendstream_lock);
513 if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) {
518 err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
521 if (dsp->dsa_pending_op != PENDING_NONE)
522 if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0)
526 if (err == EINTR && dsp->dsa_err)
531 bzero(drr, sizeof (dmu_replay_record_t));
532 drr->drr_type = DRR_END;
533 drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc;
534 drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid;
536 if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) {
542 mutex_enter(&ds->ds_sendstream_lock);
543 list_remove(&ds->ds_sendstreams, dsp);
544 mutex_exit(&ds->ds_sendstream_lock);
546 kmem_free(drr, sizeof (dmu_replay_record_t));
547 kmem_free(dsp, sizeof (dmu_sendarg_t));
553 dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
556 dsl_dataset_t *ds = tosnap->os_dsl_dataset;
557 dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
558 dsl_pool_t *dp = ds->ds_dir->dd_pool;
560 uint64_t size, recordsize;
562 /* tosnap must be a snapshot */
563 if (ds->ds_phys->ds_next_snap_obj == 0)
566 /* fromsnap must be an earlier snapshot from the same fs as tosnap */
567 if (fromds && (ds->ds_dir != fromds->ds_dir ||
568 fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
575 if (dsl_dir_is_clone(ds->ds_dir)) {
576 rw_enter(&dp->dp_config_rwlock, RW_READER);
577 err = dsl_dataset_hold_obj(dp,
578 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
579 rw_exit(&dp->dp_config_rwlock);
583 fromorigin = B_FALSE;
587 /* Get uncompressed size estimate of changed data. */
588 if (fromds == NULL) {
589 size = ds->ds_phys->ds_uncompressed_bytes;
592 err = dsl_dataset_space_written(fromds, ds,
593 &used, &comp, &size);
595 dsl_dataset_rele(fromds, FTAG);
601 * Assume that space (both on-disk and in-stream) is dominated by
602 * data. We will adjust for indirect blocks and the copies property,
603 * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
607 * Subtract out approximate space used by indirect blocks.
608 * Assume most space is used by data blocks (non-indirect, non-dnode).
609 * Assume all blocks are recordsize. Assume ditto blocks and
610 * internal fragmentation counter out compression.
612 * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
613 * block, which we observe in practice.
615 rw_enter(&dp->dp_config_rwlock, RW_READER);
616 err = dsl_prop_get_ds(ds, "recordsize",
617 sizeof (recordsize), 1, &recordsize, NULL);
618 rw_exit(&dp->dp_config_rwlock);
621 size -= size / recordsize * sizeof (blkptr_t);
623 /* Add in the space for the record associated with each block. */
624 size += size / recordsize * sizeof (dmu_replay_record_t);
631 struct recvbeginsyncarg {
634 dsl_dataset_t *origin;
636 dmu_objset_type_t type;
640 char clonelastname[MAXNAMELEN];
641 dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */
647 recv_new_check(void *arg1, void *arg2, dmu_tx_t *tx)
649 dsl_dir_t *dd = arg1;
650 struct recvbeginsyncarg *rbsa = arg2;
651 objset_t *mos = dd->dd_pool->dp_meta_objset;
655 err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
656 strrchr(rbsa->tofs, '/') + 1, sizeof (uint64_t), 1, &val);
659 return (err ? err : EEXIST);
662 /* make sure it's a snap in the same pool */
663 if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool)
665 if (!dsl_dataset_is_snapshot(rbsa->origin))
667 if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
675 recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx)
677 dsl_dir_t *dd = arg1;
678 struct recvbeginsyncarg *rbsa = arg2;
679 uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
682 /* Create and open new dataset. */
683 dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1,
684 rbsa->origin, flags, rbsa->cr, tx);
685 VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj,
686 B_TRUE, dmu_recv_tag, &rbsa->ds));
688 if (rbsa->origin == NULL) {
689 (void) dmu_objset_create_impl(dd->dd_pool->dp_spa,
690 rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx);
693 spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC,
694 dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj);
699 recv_existing_check(void *arg1, void *arg2, dmu_tx_t *tx)
701 dsl_dataset_t *ds = arg1;
702 struct recvbeginsyncarg *rbsa = arg2;
706 /* must not have any changes since most recent snapshot */
707 if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
710 /* new snapshot name must not exist */
711 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
712 ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val);
718 if (rbsa->fromguid) {
719 /* if incremental, most recent snapshot must match fromguid */
720 if (ds->ds_prev == NULL)
724 * most recent snapshot must match fromguid, or there are no
725 * changes since the fromguid one
727 if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) {
728 uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth;
729 uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj;
732 err = dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
736 if (snap->ds_phys->ds_creation_txg < birth) {
737 dsl_dataset_rele(snap, FTAG);
740 if (snap->ds_phys->ds_guid == rbsa->fromguid) {
741 dsl_dataset_rele(snap, FTAG);
744 obj = snap->ds_phys->ds_prev_snap_obj;
745 dsl_dataset_rele(snap, FTAG);
751 /* if full, most recent snapshot must be $ORIGIN */
752 if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL)
756 /* temporary clone name must not exist */
757 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
758 ds->ds_dir->dd_phys->dd_child_dir_zapobj,
759 rbsa->clonelastname, 8, 1, &val);
770 recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx)
772 dsl_dataset_t *ohds = arg1;
773 struct recvbeginsyncarg *rbsa = arg2;
774 dsl_pool_t *dp = ohds->ds_dir->dd_pool;
776 uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
779 /* create and open the temporary clone */
780 dsobj = dsl_dataset_create_sync(ohds->ds_dir, rbsa->clonelastname,
781 ohds->ds_prev, flags, rbsa->cr, tx);
782 VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, B_TRUE, dmu_recv_tag, &cds));
785 * If we actually created a non-clone, we need to create the
786 * objset in our new dataset.
788 if (BP_IS_HOLE(dsl_dataset_get_blkptr(cds))) {
789 (void) dmu_objset_create_impl(dp->dp_spa,
790 cds, dsl_dataset_get_blkptr(cds), rbsa->type, tx);
795 spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC,
796 dp->dp_spa, tx, "dataset = %lld", dsobj);
800 dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb)
804 featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
806 /* Verify pool version supports SA if SA_SPILL feature set */
807 return ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
808 (spa_version(dsl_dataset_get_spa(ds)) < SPA_VERSION_SA));
812 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
813 * succeeds; otherwise we will leak the holds on the datasets.
816 dmu_recv_begin(char *tofs, char *tosnap, char *top_ds, struct drr_begin *drrb,
817 boolean_t force, objset_t *origin, dmu_recv_cookie_t *drc)
821 struct recvbeginsyncarg rbsa = { 0 };
822 uint64_t versioninfo;
826 if (drrb->drr_magic == DMU_BACKUP_MAGIC)
828 else if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
834 rbsa.tosnap = tosnap;
835 rbsa.origin = origin ? origin->os_dsl_dataset : NULL;
836 rbsa.fromguid = drrb->drr_fromguid;
837 rbsa.type = drrb->drr_type;
841 versioninfo = drrb->drr_versioninfo;
842 flags = drrb->drr_flags;
845 rbsa.type = BSWAP_32(rbsa.type);
846 rbsa.fromguid = BSWAP_64(rbsa.fromguid);
847 versioninfo = BSWAP_64(versioninfo);
848 flags = BSWAP_32(flags);
851 if (DMU_GET_STREAM_HDRTYPE(versioninfo) == DMU_COMPOUNDSTREAM ||
852 rbsa.type >= DMU_OST_NUMTYPES ||
853 ((flags & DRR_FLAG_CLONE) && origin == NULL))
856 if (flags & DRR_FLAG_CI_DATA)
857 rbsa.dsflags = DS_FLAG_CI_DATASET;
859 bzero(drc, sizeof (dmu_recv_cookie_t));
860 drc->drc_drrb = drrb;
861 drc->drc_tosnap = tosnap;
862 drc->drc_top_ds = top_ds;
863 drc->drc_force = force;
866 * Process the begin in syncing context.
869 /* open the dataset we are logically receiving into */
870 err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds);
872 if (dmu_recv_verify_features(ds, drrb)) {
873 dsl_dataset_rele(ds, dmu_recv_tag);
876 /* target fs already exists; recv into temp clone */
878 /* Can't recv a clone into an existing fs */
879 if (flags & DRR_FLAG_CLONE) {
880 dsl_dataset_rele(ds, dmu_recv_tag);
884 /* must not have an incremental recv already in progress */
885 if (!mutex_tryenter(&ds->ds_recvlock)) {
886 dsl_dataset_rele(ds, dmu_recv_tag);
890 /* tmp clone name is: tofs/%tosnap" */
891 (void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname),
894 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
895 recv_existing_check, recv_existing_sync, ds, &rbsa, 5);
897 mutex_exit(&ds->ds_recvlock);
898 dsl_dataset_rele(ds, dmu_recv_tag);
901 drc->drc_logical_ds = ds;
902 drc->drc_real_ds = rbsa.ds;
903 } else if (err == ENOENT) {
904 /* target fs does not exist; must be a full backup or clone */
908 * If it's a non-clone incremental, we are missing the
909 * target fs, so fail the recv.
911 if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE))
914 /* Open the parent of tofs */
915 cp = strrchr(tofs, '/');
917 err = dsl_dataset_hold(tofs, FTAG, &ds);
922 if (dmu_recv_verify_features(ds, drrb)) {
923 dsl_dataset_rele(ds, FTAG);
927 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
928 recv_new_check, recv_new_sync, ds->ds_dir, &rbsa, 5);
929 dsl_dataset_rele(ds, FTAG);
932 drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds;
933 drc->drc_newfs = B_TRUE;
945 int bufsize; /* amount of memory allocated for buf */
947 avl_tree_t *guid_to_ds_map;
950 typedef struct guid_map_entry {
952 dsl_dataset_t *gme_ds;
957 guid_compare(const void *arg1, const void *arg2)
959 const guid_map_entry_t *gmep1 = arg1;
960 const guid_map_entry_t *gmep2 = arg2;
962 if (gmep1->guid < gmep2->guid)
964 else if (gmep1->guid > gmep2->guid)
970 free_guid_map_onexit(void *arg)
972 avl_tree_t *ca = arg;
974 guid_map_entry_t *gmep;
976 while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
977 dsl_dataset_rele(gmep->gme_ds, ca);
978 kmem_free(gmep, sizeof (guid_map_entry_t));
981 kmem_free(ca, sizeof (avl_tree_t));
985 restore_read(struct restorearg *ra, int len)
990 /* some things will require 8-byte alignment, so everything must */
996 ra->err = vn_rdwr(UIO_READ, ra->vp,
997 (caddr_t)ra->buf + done, len - done,
998 ra->voff, UIO_SYSSPACE, FAPPEND,
999 RLIM64_INFINITY, CRED(), &resid);
1001 if (resid == len - done)
1003 ra->voff += len - done - resid;
1009 ASSERT3U(done, ==, len);
1012 fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
1014 fletcher_4_incremental_native(rv, len, &ra->cksum);
1018 noinline static void
1019 backup_byteswap(dmu_replay_record_t *drr)
1021 #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
1022 #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
1023 drr->drr_type = BSWAP_32(drr->drr_type);
1024 drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
1025 switch (drr->drr_type) {
1027 DO64(drr_begin.drr_magic);
1028 DO64(drr_begin.drr_versioninfo);
1029 DO64(drr_begin.drr_creation_time);
1030 DO32(drr_begin.drr_type);
1031 DO32(drr_begin.drr_flags);
1032 DO64(drr_begin.drr_toguid);
1033 DO64(drr_begin.drr_fromguid);
1036 DO64(drr_object.drr_object);
1037 /* DO64(drr_object.drr_allocation_txg); */
1038 DO32(drr_object.drr_type);
1039 DO32(drr_object.drr_bonustype);
1040 DO32(drr_object.drr_blksz);
1041 DO32(drr_object.drr_bonuslen);
1042 DO64(drr_object.drr_toguid);
1044 case DRR_FREEOBJECTS:
1045 DO64(drr_freeobjects.drr_firstobj);
1046 DO64(drr_freeobjects.drr_numobjs);
1047 DO64(drr_freeobjects.drr_toguid);
1050 DO64(drr_write.drr_object);
1051 DO32(drr_write.drr_type);
1052 DO64(drr_write.drr_offset);
1053 DO64(drr_write.drr_length);
1054 DO64(drr_write.drr_toguid);
1055 DO64(drr_write.drr_key.ddk_cksum.zc_word[0]);
1056 DO64(drr_write.drr_key.ddk_cksum.zc_word[1]);
1057 DO64(drr_write.drr_key.ddk_cksum.zc_word[2]);
1058 DO64(drr_write.drr_key.ddk_cksum.zc_word[3]);
1059 DO64(drr_write.drr_key.ddk_prop);
1061 case DRR_WRITE_BYREF:
1062 DO64(drr_write_byref.drr_object);
1063 DO64(drr_write_byref.drr_offset);
1064 DO64(drr_write_byref.drr_length);
1065 DO64(drr_write_byref.drr_toguid);
1066 DO64(drr_write_byref.drr_refguid);
1067 DO64(drr_write_byref.drr_refobject);
1068 DO64(drr_write_byref.drr_refoffset);
1069 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]);
1070 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]);
1071 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]);
1072 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]);
1073 DO64(drr_write_byref.drr_key.ddk_prop);
1076 DO64(drr_free.drr_object);
1077 DO64(drr_free.drr_offset);
1078 DO64(drr_free.drr_length);
1079 DO64(drr_free.drr_toguid);
1082 DO64(drr_spill.drr_object);
1083 DO64(drr_spill.drr_length);
1084 DO64(drr_spill.drr_toguid);
1087 DO64(drr_end.drr_checksum.zc_word[0]);
1088 DO64(drr_end.drr_checksum.zc_word[1]);
1089 DO64(drr_end.drr_checksum.zc_word[2]);
1090 DO64(drr_end.drr_checksum.zc_word[3]);
1091 DO64(drr_end.drr_toguid);
1101 restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
1107 if (drro->drr_type == DMU_OT_NONE ||
1108 !DMU_OT_IS_VALID(drro->drr_type) ||
1109 !DMU_OT_IS_VALID(drro->drr_bonustype) ||
1110 drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
1111 drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
1112 P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
1113 drro->drr_blksz < SPA_MINBLOCKSIZE ||
1114 drro->drr_blksz > SPA_MAXBLOCKSIZE ||
1115 drro->drr_bonuslen > DN_MAX_BONUSLEN) {
1119 err = dmu_object_info(os, drro->drr_object, NULL);
1121 if (err != 0 && err != ENOENT)
1124 if (drro->drr_bonuslen) {
1125 data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
1130 if (err == ENOENT) {
1131 /* currently free, want to be allocated */
1132 tx = dmu_tx_create(os);
1133 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1134 err = dmu_tx_assign(tx, TXG_WAIT);
1139 err = dmu_object_claim(os, drro->drr_object,
1140 drro->drr_type, drro->drr_blksz,
1141 drro->drr_bonustype, drro->drr_bonuslen, tx);
1144 /* currently allocated, want to be allocated */
1145 err = dmu_object_reclaim(os, drro->drr_object,
1146 drro->drr_type, drro->drr_blksz,
1147 drro->drr_bonustype, drro->drr_bonuslen);
1153 tx = dmu_tx_create(os);
1154 dmu_tx_hold_bonus(tx, drro->drr_object);
1155 err = dmu_tx_assign(tx, TXG_WAIT);
1161 dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
1163 dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
1168 VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
1169 dmu_buf_will_dirty(db, tx);
1171 ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
1172 bcopy(data, db->db_data, drro->drr_bonuslen);
1174 dmu_object_byteswap_t byteswap =
1175 DMU_OT_BYTESWAP(drro->drr_bonustype);
1176 dmu_ot_byteswap[byteswap].ob_func(db->db_data,
1177 drro->drr_bonuslen);
1179 dmu_buf_rele(db, FTAG);
1187 restore_freeobjects(struct restorearg *ra, objset_t *os,
1188 struct drr_freeobjects *drrfo)
1192 if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
1195 for (obj = drrfo->drr_firstobj;
1196 obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
1197 (void) dmu_object_next(os, &obj, FALSE, 0)) {
1200 if (dmu_object_info(os, obj, NULL) != 0)
1203 err = dmu_free_object(os, obj);
1211 restore_write(struct restorearg *ra, objset_t *os,
1212 struct drr_write *drrw)
1218 if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
1219 !DMU_OT_IS_VALID(drrw->drr_type))
1222 data = restore_read(ra, drrw->drr_length);
1226 if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
1229 tx = dmu_tx_create(os);
1231 dmu_tx_hold_write(tx, drrw->drr_object,
1232 drrw->drr_offset, drrw->drr_length);
1233 err = dmu_tx_assign(tx, TXG_WAIT);
1239 dmu_object_byteswap_t byteswap =
1240 DMU_OT_BYTESWAP(drrw->drr_type);
1241 dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length);
1243 dmu_write(os, drrw->drr_object,
1244 drrw->drr_offset, drrw->drr_length, data, tx);
1250 * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
1251 * streams to refer to a copy of the data that is already on the
1252 * system because it came in earlier in the stream. This function
1253 * finds the earlier copy of the data, and uses that copy instead of
1254 * data from the stream to fulfill this write.
1257 restore_write_byref(struct restorearg *ra, objset_t *os,
1258 struct drr_write_byref *drrwbr)
1262 guid_map_entry_t gmesrch;
1263 guid_map_entry_t *gmep;
1265 objset_t *ref_os = NULL;
1268 if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
1272 * If the GUID of the referenced dataset is different from the
1273 * GUID of the target dataset, find the referenced dataset.
1275 if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
1276 gmesrch.guid = drrwbr->drr_refguid;
1277 if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
1281 if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
1287 err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
1288 drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH);
1292 tx = dmu_tx_create(os);
1294 dmu_tx_hold_write(tx, drrwbr->drr_object,
1295 drrwbr->drr_offset, drrwbr->drr_length);
1296 err = dmu_tx_assign(tx, TXG_WAIT);
1301 dmu_write(os, drrwbr->drr_object,
1302 drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
1303 dmu_buf_rele(dbp, FTAG);
1309 restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
1313 dmu_buf_t *db, *db_spill;
1316 if (drrs->drr_length < SPA_MINBLOCKSIZE ||
1317 drrs->drr_length > SPA_MAXBLOCKSIZE)
1320 data = restore_read(ra, drrs->drr_length);
1324 if (dmu_object_info(os, drrs->drr_object, NULL) != 0)
1327 VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db));
1328 if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
1329 dmu_buf_rele(db, FTAG);
1333 tx = dmu_tx_create(os);
1335 dmu_tx_hold_spill(tx, db->db_object);
1337 err = dmu_tx_assign(tx, TXG_WAIT);
1339 dmu_buf_rele(db, FTAG);
1340 dmu_buf_rele(db_spill, FTAG);
1344 dmu_buf_will_dirty(db_spill, tx);
1346 if (db_spill->db_size < drrs->drr_length)
1347 VERIFY(0 == dbuf_spill_set_blksz(db_spill,
1348 drrs->drr_length, tx));
1349 bcopy(data, db_spill->db_data, drrs->drr_length);
1351 dmu_buf_rele(db, FTAG);
1352 dmu_buf_rele(db_spill, FTAG);
1360 restore_free(struct restorearg *ra, objset_t *os,
1361 struct drr_free *drrf)
1365 if (drrf->drr_length != -1ULL &&
1366 drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
1369 if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
1372 err = dmu_free_long_range(os, drrf->drr_object,
1373 drrf->drr_offset, drrf->drr_length);
1378 * NB: callers *must* call dmu_recv_end() if this succeeds.
1381 dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
1382 int cleanup_fd, uint64_t *action_handlep)
1384 struct restorearg ra = { 0 };
1385 dmu_replay_record_t *drr;
1390 if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
1394 /* compute checksum of drr_begin record */
1395 dmu_replay_record_t *drr;
1396 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
1398 drr->drr_type = DRR_BEGIN;
1399 drr->drr_u.drr_begin = *drc->drc_drrb;
1401 fletcher_4_incremental_byteswap(drr,
1402 sizeof (dmu_replay_record_t), &ra.cksum);
1404 fletcher_4_incremental_native(drr,
1405 sizeof (dmu_replay_record_t), &ra.cksum);
1407 kmem_free(drr, sizeof (dmu_replay_record_t));
1411 struct drr_begin *drrb = drc->drc_drrb;
1412 drrb->drr_magic = BSWAP_64(drrb->drr_magic);
1413 drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
1414 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
1415 drrb->drr_type = BSWAP_32(drrb->drr_type);
1416 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
1417 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
1423 ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP);
1425 /* these were verified in dmu_recv_begin */
1426 ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) ==
1428 ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES);
1431 * Open the objset we are modifying.
1433 VERIFY(dmu_objset_from_ds(drc->drc_real_ds, &os) == 0);
1435 ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
1437 featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
1439 /* if this stream is dedup'ed, set up the avl tree for guid mapping */
1440 if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
1443 if (cleanup_fd == -1) {
1447 ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor);
1453 if (*action_handlep == 0) {
1455 kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
1456 avl_create(ra.guid_to_ds_map, guid_compare,
1457 sizeof (guid_map_entry_t),
1458 offsetof(guid_map_entry_t, avlnode));
1459 ra.err = zfs_onexit_add_cb(minor,
1460 free_guid_map_onexit, ra.guid_to_ds_map,
1465 ra.err = zfs_onexit_cb_data(minor, *action_handlep,
1466 (void **)&ra.guid_to_ds_map);
1471 drc->drc_guid_to_ds_map = ra.guid_to_ds_map;
1475 * Read records and process them.
1478 while (ra.err == 0 &&
1479 NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
1480 if (issig(JUSTLOOKING) && issig(FORREAL)) {
1486 backup_byteswap(drr);
1488 switch (drr->drr_type) {
1492 * We need to make a copy of the record header,
1493 * because restore_{object,write} may need to
1494 * restore_read(), which will invalidate drr.
1496 struct drr_object drro = drr->drr_u.drr_object;
1497 ra.err = restore_object(&ra, os, &drro);
1500 case DRR_FREEOBJECTS:
1502 struct drr_freeobjects drrfo =
1503 drr->drr_u.drr_freeobjects;
1504 ra.err = restore_freeobjects(&ra, os, &drrfo);
1509 struct drr_write drrw = drr->drr_u.drr_write;
1510 ra.err = restore_write(&ra, os, &drrw);
1513 case DRR_WRITE_BYREF:
1515 struct drr_write_byref drrwbr =
1516 drr->drr_u.drr_write_byref;
1517 ra.err = restore_write_byref(&ra, os, &drrwbr);
1522 struct drr_free drrf = drr->drr_u.drr_free;
1523 ra.err = restore_free(&ra, os, &drrf);
1528 struct drr_end drre = drr->drr_u.drr_end;
1530 * We compare against the *previous* checksum
1531 * value, because the stored checksum is of
1532 * everything before the DRR_END record.
1534 if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
1540 struct drr_spill drrs = drr->drr_u.drr_spill;
1541 ra.err = restore_spill(&ra, os, &drrs);
1550 ASSERT(ra.err != 0);
1553 if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
1554 zfs_onexit_fd_rele(cleanup_fd);
1558 * destroy what we created, so we don't leave it in the
1559 * inconsistent restoring state.
1561 txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
1563 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
1565 if (drc->drc_real_ds != drc->drc_logical_ds) {
1566 mutex_exit(&drc->drc_logical_ds->ds_recvlock);
1567 dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag);
1571 vmem_free(ra.buf, ra.bufsize);
1576 struct recvendsyncarg {
1578 uint64_t creation_time;
1583 recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx)
1585 dsl_dataset_t *ds = arg1;
1586 struct recvendsyncarg *resa = arg2;
1588 return (dsl_dataset_snapshot_check(ds, resa->tosnap, tx));
1592 recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx)
1594 dsl_dataset_t *ds = arg1;
1595 struct recvendsyncarg *resa = arg2;
1597 dsl_dataset_snapshot_sync(ds, resa->tosnap, tx);
1599 /* set snapshot's creation time and guid */
1600 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
1601 ds->ds_prev->ds_phys->ds_creation_time = resa->creation_time;
1602 ds->ds_prev->ds_phys->ds_guid = resa->toguid;
1603 ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1605 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1606 ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1610 add_ds_to_guidmap(avl_tree_t *guid_map, dsl_dataset_t *ds)
1612 dsl_pool_t *dp = ds->ds_dir->dd_pool;
1613 uint64_t snapobj = ds->ds_phys->ds_prev_snap_obj;
1614 dsl_dataset_t *snapds;
1615 guid_map_entry_t *gmep;
1618 ASSERT(guid_map != NULL);
1620 rw_enter(&dp->dp_config_rwlock, RW_READER);
1621 err = dsl_dataset_hold_obj(dp, snapobj, guid_map, &snapds);
1623 gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP);
1624 gmep->guid = snapds->ds_phys->ds_guid;
1625 gmep->gme_ds = snapds;
1626 avl_add(guid_map, gmep);
1629 rw_exit(&dp->dp_config_rwlock);
1634 dmu_recv_existing_end(dmu_recv_cookie_t *drc)
1636 struct recvendsyncarg resa;
1637 dsl_dataset_t *ds = drc->drc_logical_ds;
1640 if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) {
1641 err = dsl_dataset_clone_swap(drc->drc_real_ds, ds,
1646 mutex_exit(&ds->ds_recvlock);
1647 dsl_dataset_rele(ds, dmu_recv_tag);
1648 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
1653 resa.creation_time = drc->drc_drrb->drr_creation_time;
1654 resa.toguid = drc->drc_drrb->drr_toguid;
1655 resa.tosnap = drc->drc_tosnap;
1657 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
1658 recv_end_check, recv_end_sync, ds, &resa, 3);
1661 (void) dsl_dataset_clone_swap(drc->drc_real_ds, ds, B_TRUE);
1665 mutex_exit(&ds->ds_recvlock);
1666 if (err == 0 && drc->drc_guid_to_ds_map != NULL)
1667 (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
1668 dsl_dataset_disown(ds, dmu_recv_tag);
1669 myerr = dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
1675 dmu_recv_new_end(dmu_recv_cookie_t *drc)
1677 struct recvendsyncarg resa;
1678 dsl_dataset_t *ds = drc->drc_logical_ds;
1682 * XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
1683 * expects it to have a ds_user_ptr (and zil), but clone_swap()
1686 txg_wait_synced(ds->ds_dir->dd_pool, 0);
1688 resa.creation_time = drc->drc_drrb->drr_creation_time;
1689 resa.toguid = drc->drc_drrb->drr_toguid;
1690 resa.tosnap = drc->drc_tosnap;
1692 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
1693 recv_end_check, recv_end_sync, ds, &resa, 3);
1695 /* clean up the fs we just recv'd into */
1696 (void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE);
1698 if (drc->drc_guid_to_ds_map != NULL)
1699 (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
1700 /* release the hold from dmu_recv_begin */
1701 dsl_dataset_disown(ds, dmu_recv_tag);
1707 dmu_recv_end(dmu_recv_cookie_t *drc)
1709 if (drc->drc_logical_ds != drc->drc_real_ds)
1710 return (dmu_recv_existing_end(drc));
1712 return (dmu_recv_new_end(drc));