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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 #pragma ident "@(#)dmu_send.c 1.14 08/04/27 SMI"
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_pool.h>
39 #include <sys/dsl_synctask.h>
40 #include <sys/zfs_ioctl.h>
42 #include <sys/zio_checksum.h>
44 static char *dmu_recv_tag = "dmu_recv_tag";
47 dmu_replay_record_t *drr;
56 dump_bytes(struct backuparg *ba, void *buf, int len)
58 ssize_t resid; /* have to get resid to get detailed errno */
59 ASSERT3U(len % 8, ==, 0);
61 fletcher_4_incremental_native(buf, len, &ba->zc);
62 ba->err = vn_rdwr(UIO_WRITE, ba->vp,
64 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
70 dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
73 /* write a FREE record */
74 bzero(ba->drr, sizeof (dmu_replay_record_t));
75 ba->drr->drr_type = DRR_FREE;
76 ba->drr->drr_u.drr_free.drr_object = object;
77 ba->drr->drr_u.drr_free.drr_offset = offset;
78 ba->drr->drr_u.drr_free.drr_length = length;
80 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
86 dump_data(struct backuparg *ba, dmu_object_type_t type,
87 uint64_t object, uint64_t offset, int blksz, void *data)
89 /* write a DATA record */
90 bzero(ba->drr, sizeof (dmu_replay_record_t));
91 ba->drr->drr_type = DRR_WRITE;
92 ba->drr->drr_u.drr_write.drr_object = object;
93 ba->drr->drr_u.drr_write.drr_type = type;
94 ba->drr->drr_u.drr_write.drr_offset = offset;
95 ba->drr->drr_u.drr_write.drr_length = blksz;
97 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
99 if (dump_bytes(ba, data, blksz))
105 dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
107 /* write a FREEOBJECTS record */
108 bzero(ba->drr, sizeof (dmu_replay_record_t));
109 ba->drr->drr_type = DRR_FREEOBJECTS;
110 ba->drr->drr_u.drr_freeobjects.drr_firstobj = firstobj;
111 ba->drr->drr_u.drr_freeobjects.drr_numobjs = numobjs;
113 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
119 dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
121 if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
122 return (dump_freeobjects(ba, object, 1));
124 /* write an OBJECT record */
125 bzero(ba->drr, sizeof (dmu_replay_record_t));
126 ba->drr->drr_type = DRR_OBJECT;
127 ba->drr->drr_u.drr_object.drr_object = object;
128 ba->drr->drr_u.drr_object.drr_type = dnp->dn_type;
129 ba->drr->drr_u.drr_object.drr_bonustype = dnp->dn_bonustype;
130 ba->drr->drr_u.drr_object.drr_blksz =
131 dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
132 ba->drr->drr_u.drr_object.drr_bonuslen = dnp->dn_bonuslen;
133 ba->drr->drr_u.drr_object.drr_checksum = dnp->dn_checksum;
134 ba->drr->drr_u.drr_object.drr_compress = dnp->dn_compress;
136 if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
139 if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)))
142 /* free anything past the end of the file */
143 if (dump_free(ba, object, (dnp->dn_maxblkid + 1) *
144 (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
151 #define BP_SPAN(dnp, level) \
152 (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
153 (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
156 backup_cb(traverse_blk_cache_t *bc, spa_t *spa, void *arg)
158 struct backuparg *ba = arg;
159 uint64_t object = bc->bc_bookmark.zb_object;
160 int level = bc->bc_bookmark.zb_level;
161 uint64_t blkid = bc->bc_bookmark.zb_blkid;
162 blkptr_t *bp = bc->bc_blkptr.blk_birth ? &bc->bc_blkptr : NULL;
163 dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
164 void *data = bc->bc_data;
167 if (issig(JUSTLOOKING) && issig(FORREAL))
170 ASSERT(data || bp == NULL);
172 if (bp == NULL && object == 0) {
173 uint64_t span = BP_SPAN(bc->bc_dnode, level);
174 uint64_t dnobj = (blkid * span) >> DNODE_SHIFT;
175 err = dump_freeobjects(ba, dnobj, span >> DNODE_SHIFT);
176 } else if (bp == NULL) {
177 uint64_t span = BP_SPAN(bc->bc_dnode, level);
178 err = dump_free(ba, object, blkid * span, span);
179 } else if (data && level == 0 && type == DMU_OT_DNODE) {
180 dnode_phys_t *blk = data;
182 int blksz = BP_GET_LSIZE(bp);
184 for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
186 (blkid << (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
187 err = dump_dnode(ba, dnobj, blk+i);
191 } else if (level == 0 &&
192 type != DMU_OT_DNODE && type != DMU_OT_OBJSET) {
193 int blksz = BP_GET_LSIZE(bp);
195 uint32_t aflags = ARC_WAIT;
199 zb.zb_objset = ba->os->os->os_dsl_dataset->ds_object;
200 zb.zb_object = object;
203 (void) arc_read(NULL, spa, bp,
204 dmu_ot[type].ot_byteswap, arc_getbuf_func, &abuf,
205 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_MUSTSUCCEED,
209 err = dump_data(ba, type, object, blkid * blksz,
210 blksz, abuf->b_data);
211 (void) arc_buf_remove_ref(abuf, &abuf);
214 err = dump_data(ba, type, object, blkid * blksz,
219 ASSERT(err == 0 || err == EINTR);
224 dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
225 vnode_t *vp, offset_t *off)
227 dsl_dataset_t *ds = tosnap->os->os_dsl_dataset;
228 dsl_dataset_t *fromds = fromsnap ? fromsnap->os->os_dsl_dataset : NULL;
229 dmu_replay_record_t *drr;
232 uint64_t fromtxg = 0;
234 /* tosnap must be a snapshot */
235 if (ds->ds_phys->ds_next_snap_obj == 0)
238 /* fromsnap must be an earlier snapshot from the same fs as tosnap */
239 if (fromds && (ds->ds_dir != fromds->ds_dir ||
240 fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
247 if (ds->ds_dir->dd_phys->dd_origin_obj != NULL) {
248 dsl_pool_t *dp = ds->ds_dir->dd_pool;
249 rw_enter(&dp->dp_config_rwlock, RW_READER);
250 err = dsl_dataset_open_obj(dp,
251 ds->ds_dir->dd_phys->dd_origin_obj, NULL,
252 DS_MODE_NONE, FTAG, &fromds);
253 rw_exit(&dp->dp_config_rwlock);
257 fromorigin = B_FALSE;
262 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
263 drr->drr_type = DRR_BEGIN;
264 drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
265 drr->drr_u.drr_begin.drr_version = DMU_BACKUP_STREAM_VERSION;
266 drr->drr_u.drr_begin.drr_creation_time =
267 ds->ds_phys->ds_creation_time;
268 drr->drr_u.drr_begin.drr_type = tosnap->os->os_phys->os_type;
270 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
271 drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
272 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
273 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
276 drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
277 dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
280 fromtxg = fromds->ds_phys->ds_creation_txg;
282 dsl_dataset_close(fromds, DS_MODE_NONE, FTAG);
288 ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0);
290 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t))) {
291 kmem_free(drr, sizeof (dmu_replay_record_t));
295 err = traverse_dsl_dataset(ds, fromtxg,
296 ADVANCE_PRE | ADVANCE_HOLES | ADVANCE_DATA | ADVANCE_NOLOCK,
300 if (err == EINTR && ba.err)
302 kmem_free(drr, sizeof (dmu_replay_record_t));
306 bzero(drr, sizeof (dmu_replay_record_t));
307 drr->drr_type = DRR_END;
308 drr->drr_u.drr_end.drr_checksum = ba.zc;
310 if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t))) {
311 kmem_free(drr, sizeof (dmu_replay_record_t));
315 kmem_free(drr, sizeof (dmu_replay_record_t));
320 struct recvbeginsyncarg {
323 dsl_dataset_t *origin;
325 dmu_objset_type_t type;
329 char clonelastname[MAXNAMELEN];
330 dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */
333 static dsl_dataset_t *
334 recv_full_sync_impl(dsl_pool_t *dp, uint64_t dsobj, dmu_objset_type_t type,
335 cred_t *cr, dmu_tx_t *tx)
339 VERIFY(0 == dsl_dataset_open_obj(dp, dsobj, NULL,
340 DS_MODE_EXCLUSIVE, dmu_recv_tag, &ds));
342 if (type != DMU_OST_NONE) {
343 (void) dmu_objset_create_impl(dp->dp_spa,
344 ds, &ds->ds_phys->ds_bp, type, tx);
347 spa_history_internal_log(LOG_DS_REPLAY_FULL_SYNC,
348 ds->ds_dir->dd_pool->dp_spa, tx, cr, "dataset = %lld",
349 ds->ds_phys->ds_dir_obj);
356 recv_full_check(void *arg1, void *arg2, dmu_tx_t *tx)
358 dsl_dir_t *dd = arg1;
359 struct recvbeginsyncarg *rbsa = arg2;
360 objset_t *mos = dd->dd_pool->dp_meta_objset;
364 err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
365 strrchr(rbsa->tofs, '/') + 1, sizeof (uint64_t), 1, &val);
368 return (err ? err : EEXIST);
371 /* make sure it's a snap in the same pool */
372 if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool)
374 if (rbsa->origin->ds_phys->ds_num_children == 0)
376 if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
384 recv_full_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
386 dsl_dir_t *dd = arg1;
387 struct recvbeginsyncarg *rbsa = arg2;
389 uint64_t flags = DS_FLAG_INCONSISTENT;
391 flags |= rbsa->dsflags;
393 dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1,
394 rbsa->origin, flags, cr, tx);
396 rbsa->ds = recv_full_sync_impl(dd->dd_pool, dsobj,
397 rbsa->origin ? DMU_OST_NONE : rbsa->type, cr, tx);
401 recv_full_existing_check(void *arg1, void *arg2, dmu_tx_t *tx)
403 dsl_dataset_t *ds = arg1;
404 struct recvbeginsyncarg *rbsa = arg2;
407 /* must be a head ds */
408 if (ds->ds_phys->ds_next_snap_obj != 0)
411 /* must not be a clone ds */
412 if (ds->ds_prev != NULL)
415 err = dsl_dataset_destroy_check(ds, rbsa->tag, tx);
420 /* make sure it's a snap in the same pool */
421 if (rbsa->origin->ds_dir->dd_pool != ds->ds_dir->dd_pool)
423 if (rbsa->origin->ds_phys->ds_num_children == 0)
425 if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
433 recv_full_existing_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
435 dsl_dataset_t *ds = arg1;
436 struct recvbeginsyncarg *rbsa = arg2;
437 dsl_dir_t *dd = ds->ds_dir;
439 uint64_t flags = DS_FLAG_INCONSISTENT;
441 flags |= rbsa->dsflags;
444 * NB: caller must provide an extra hold on the dsl_dir_t, so it
445 * won't go away when dsl_dataset_destroy_sync() closes the
448 dsl_dataset_destroy_sync(ds, rbsa->tag, cr, tx);
450 dsobj = dsl_dataset_create_sync_impl(dd, rbsa->origin, flags, tx);
452 rbsa->ds = recv_full_sync_impl(dd->dd_pool, dsobj,
453 rbsa->origin ? DMU_OST_NONE : rbsa->type, cr, tx);
458 recv_incremental_check(void *arg1, void *arg2, dmu_tx_t *tx)
460 dsl_dataset_t *ds = arg1;
461 struct recvbeginsyncarg *rbsa = arg2;
465 /* must not have any changes since most recent snapshot */
466 if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
469 /* must already be a snapshot of this fs */
470 if (ds->ds_phys->ds_prev_snap_obj == 0)
473 /* most recent snapshot must match fromguid */
474 if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid)
477 /* temporary clone name must not exist */
478 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
479 ds->ds_dir->dd_phys->dd_child_dir_zapobj,
480 rbsa->clonelastname, 8, 1, &val);
486 /* new snapshot name must not exist */
487 err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
488 ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val);
498 recv_online_incremental_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
500 dsl_dataset_t *ohds = arg1;
501 struct recvbeginsyncarg *rbsa = arg2;
502 dsl_pool_t *dp = ohds->ds_dir->dd_pool;
503 dsl_dataset_t *ods, *cds;
505 uint64_t flags = DS_FLAG_INCONSISTENT;
507 flags |= rbsa->dsflags;
509 /* create the temporary clone */
510 VERIFY(0 == dsl_dataset_open_obj(dp, ohds->ds_phys->ds_prev_snap_obj,
511 NULL, DS_MODE_STANDARD, FTAG, &ods));
512 dsobj = dsl_dataset_create_sync(ohds->ds_dir,
513 rbsa->clonelastname, ods, flags, cr, tx);
514 dsl_dataset_close(ods, DS_MODE_STANDARD, FTAG);
516 /* open the temporary clone */
517 VERIFY(0 == dsl_dataset_open_obj(dp, dsobj, NULL,
518 DS_MODE_EXCLUSIVE, dmu_recv_tag, &cds));
520 /* copy the refquota from the target fs to the clone */
521 if (ohds->ds_quota > 0)
522 dsl_dataset_set_quota_sync(cds, &ohds->ds_quota, cr, tx);
526 spa_history_internal_log(LOG_DS_REPLAY_INC_SYNC,
527 dp->dp_spa, tx, cr, "dataset = %lld",
528 cds->ds_phys->ds_dir_obj);
533 recv_offline_incremental_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
535 dsl_dataset_t *ds = arg1;
537 dmu_buf_will_dirty(ds->ds_dbuf, tx);
538 ds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT;
540 spa_history_internal_log(LOG_DS_REPLAY_INC_SYNC,
541 ds->ds_dir->dd_pool->dp_spa, tx, cr, "dataset = %lld",
542 ds->ds_phys->ds_dir_obj);
546 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
547 * succeeds; otherwise we will leak the holds on the datasets.
550 dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb,
551 boolean_t force, objset_t *origin, boolean_t online, dmu_recv_cookie_t *drc)
555 struct recvbeginsyncarg rbsa;
560 if (drrb->drr_magic == DMU_BACKUP_MAGIC)
562 else if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
568 rbsa.tosnap = tosnap;
569 rbsa.origin = origin ? origin->os->os_dsl_dataset : NULL;
570 rbsa.fromguid = drrb->drr_fromguid;
571 rbsa.type = drrb->drr_type;
574 version = drrb->drr_version;
575 flags = drrb->drr_flags;
578 rbsa.type = BSWAP_32(rbsa.type);
579 rbsa.fromguid = BSWAP_64(rbsa.fromguid);
580 version = BSWAP_64(version);
581 flags = BSWAP_32(flags);
584 if (version != DMU_BACKUP_STREAM_VERSION ||
585 rbsa.type >= DMU_OST_NUMTYPES ||
586 ((flags & DRR_FLAG_CLONE) && origin == NULL))
589 if (flags & DRR_FLAG_CI_DATA)
590 rbsa.dsflags = DS_FLAG_CI_DATASET;
592 bzero(drc, sizeof (dmu_recv_cookie_t));
593 drc->drc_drrb = drrb;
594 drc->drc_tosnap = tosnap;
595 drc->drc_force = force;
598 * Process the begin in syncing context.
600 if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE) && !online) {
601 /* offline incremental receive */
602 err = dsl_dataset_open(tofs,
603 DS_MODE_EXCLUSIVE, dmu_recv_tag, &ds);
608 * Only do the rollback if the most recent snapshot
609 * matches the incremental source
612 if (ds->ds_prev == NULL ||
613 ds->ds_prev->ds_phys->ds_guid !=
615 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE,
619 (void) dsl_dataset_rollback(ds, DMU_OST_NONE);
621 rbsa.force = B_FALSE;
622 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
623 recv_incremental_check,
624 recv_offline_incremental_sync,
627 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, dmu_recv_tag);
630 drc->drc_logical_ds = drc->drc_real_ds = ds;
631 } else if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE)) {
632 /* online incremental receive */
634 /* tmp clone name is: tofs/%tosnap" */
635 (void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname),
638 /* open the dataset we are logically receiving into */
639 err = dsl_dataset_open(tofs,
640 DS_MODE_STANDARD, dmu_recv_tag, &ds);
645 err = dsl_sync_task_do(ds->ds_dir->dd_pool,
646 recv_incremental_check,
647 recv_online_incremental_sync, ds, &rbsa, 5);
649 dsl_dataset_close(ds, DS_MODE_STANDARD, dmu_recv_tag);
652 drc->drc_logical_ds = ds;
653 drc->drc_real_ds = rbsa.ds;
655 /* create new fs -- full backup or clone */
656 dsl_dir_t *dd = NULL;
659 err = dsl_dir_open(tofs, FTAG, &dd, &tail);
664 dsl_dir_close(dd, FTAG);
668 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
669 err = dsl_dataset_open_obj(dd->dd_pool,
670 dd->dd_phys->dd_head_dataset_obj, NULL,
671 DS_MODE_EXCLUSIVE | DS_MODE_INCONSISTENT,
673 rw_exit(&dd->dd_pool->dp_config_rwlock);
675 dsl_dir_close(dd, FTAG);
679 err = dsl_sync_task_do(dd->dd_pool,
680 recv_full_existing_check,
681 recv_full_existing_sync, ds, &rbsa, 5);
682 /* if successful, sync task closes the ds for us */
684 dsl_dataset_close(ds, DS_MODE_EXCLUSIVE, FTAG);
686 err = dsl_sync_task_do(dd->dd_pool, recv_full_check,
687 recv_full_sync, dd, &rbsa, 5);
691 dsl_dir_close(dd, FTAG);
694 drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds;
695 drc->drc_newfs = B_TRUE;
698 /* downgrade our hold on the ds from EXCLUSIVE to PRIMARY */
699 dsl_dataset_downgrade(drc->drc_real_ds,
700 DS_MODE_EXCLUSIVE, DS_MODE_PRIMARY);
711 int bufsize; /* amount of memory allocated for buf */
716 restore_read(struct restorearg *ra, int len)
721 /* some things will require 8-byte alignment, so everything must */
722 ASSERT3U(len % 8, ==, 0);
727 ra->err = vn_rdwr(UIO_READ, ra->vp,
728 (caddr_t)ra->buf + done, len - done,
729 ra->voff, UIO_SYSSPACE, FAPPEND,
730 RLIM64_INFINITY, CRED(), &resid);
732 if (resid == len - done)
734 ra->voff += len - done - resid;
740 ASSERT3U(done, ==, len);
743 fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
745 fletcher_4_incremental_native(rv, len, &ra->cksum);
750 backup_byteswap(dmu_replay_record_t *drr)
752 #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
753 #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
754 drr->drr_type = BSWAP_32(drr->drr_type);
755 drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
756 switch (drr->drr_type) {
758 DO64(drr_begin.drr_magic);
759 DO64(drr_begin.drr_version);
760 DO64(drr_begin.drr_creation_time);
761 DO32(drr_begin.drr_type);
762 DO32(drr_begin.drr_flags);
763 DO64(drr_begin.drr_toguid);
764 DO64(drr_begin.drr_fromguid);
767 DO64(drr_object.drr_object);
768 /* DO64(drr_object.drr_allocation_txg); */
769 DO32(drr_object.drr_type);
770 DO32(drr_object.drr_bonustype);
771 DO32(drr_object.drr_blksz);
772 DO32(drr_object.drr_bonuslen);
774 case DRR_FREEOBJECTS:
775 DO64(drr_freeobjects.drr_firstobj);
776 DO64(drr_freeobjects.drr_numobjs);
779 DO64(drr_write.drr_object);
780 DO32(drr_write.drr_type);
781 DO64(drr_write.drr_offset);
782 DO64(drr_write.drr_length);
785 DO64(drr_free.drr_object);
786 DO64(drr_free.drr_offset);
787 DO64(drr_free.drr_length);
790 DO64(drr_end.drr_checksum.zc_word[0]);
791 DO64(drr_end.drr_checksum.zc_word[1]);
792 DO64(drr_end.drr_checksum.zc_word[2]);
793 DO64(drr_end.drr_checksum.zc_word[3]);
801 restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
806 err = dmu_object_info(os, drro->drr_object, NULL);
808 if (err != 0 && err != ENOENT)
811 if (drro->drr_type == DMU_OT_NONE ||
812 drro->drr_type >= DMU_OT_NUMTYPES ||
813 drro->drr_bonustype >= DMU_OT_NUMTYPES ||
814 drro->drr_checksum >= ZIO_CHECKSUM_FUNCTIONS ||
815 drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
816 P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
817 drro->drr_blksz < SPA_MINBLOCKSIZE ||
818 drro->drr_blksz > SPA_MAXBLOCKSIZE ||
819 drro->drr_bonuslen > DN_MAX_BONUSLEN) {
823 tx = dmu_tx_create(os);
826 /* currently free, want to be allocated */
827 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
828 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 1);
829 err = dmu_tx_assign(tx, TXG_WAIT);
834 err = dmu_object_claim(os, drro->drr_object,
835 drro->drr_type, drro->drr_blksz,
836 drro->drr_bonustype, drro->drr_bonuslen, tx);
838 /* currently allocated, want to be allocated */
839 dmu_tx_hold_bonus(tx, drro->drr_object);
841 * We may change blocksize, so need to
844 dmu_tx_hold_write(tx, drro->drr_object, 0, 1);
845 err = dmu_tx_assign(tx, TXG_WAIT);
851 err = dmu_object_reclaim(os, drro->drr_object,
852 drro->drr_type, drro->drr_blksz,
853 drro->drr_bonustype, drro->drr_bonuslen, tx);
860 dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksum, tx);
861 dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
863 if (drro->drr_bonuslen) {
866 VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
867 dmu_buf_will_dirty(db, tx);
869 ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
870 data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
875 bcopy(data, db->db_data, drro->drr_bonuslen);
877 dmu_ot[drro->drr_bonustype].ot_byteswap(db->db_data,
880 dmu_buf_rele(db, FTAG);
888 restore_freeobjects(struct restorearg *ra, objset_t *os,
889 struct drr_freeobjects *drrfo)
893 if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
896 for (obj = drrfo->drr_firstobj;
897 obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
898 (void) dmu_object_next(os, &obj, FALSE, 0)) {
902 if (dmu_object_info(os, obj, NULL) != 0)
905 tx = dmu_tx_create(os);
906 dmu_tx_hold_bonus(tx, obj);
907 err = dmu_tx_assign(tx, TXG_WAIT);
912 err = dmu_object_free(os, obj, tx);
914 if (err && err != ENOENT)
921 restore_write(struct restorearg *ra, objset_t *os,
922 struct drr_write *drrw)
928 if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
929 drrw->drr_type >= DMU_OT_NUMTYPES)
932 data = restore_read(ra, drrw->drr_length);
936 if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
939 tx = dmu_tx_create(os);
941 dmu_tx_hold_write(tx, drrw->drr_object,
942 drrw->drr_offset, drrw->drr_length);
943 err = dmu_tx_assign(tx, TXG_WAIT);
949 dmu_ot[drrw->drr_type].ot_byteswap(data, drrw->drr_length);
950 dmu_write(os, drrw->drr_object,
951 drrw->drr_offset, drrw->drr_length, data, tx);
958 restore_free(struct restorearg *ra, objset_t *os,
959 struct drr_free *drrf)
964 if (drrf->drr_length != -1ULL &&
965 drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
968 if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
971 tx = dmu_tx_create(os);
973 dmu_tx_hold_free(tx, drrf->drr_object,
974 drrf->drr_offset, drrf->drr_length);
975 err = dmu_tx_assign(tx, TXG_WAIT);
980 err = dmu_free_range(os, drrf->drr_object,
981 drrf->drr_offset, drrf->drr_length, tx);
987 dmu_recv_abort_cleanup(dmu_recv_cookie_t *drc)
989 if (drc->drc_newfs || drc->drc_real_ds != drc->drc_logical_ds) {
991 * online incremental or new fs: destroy the fs (which
992 * may be a clone) that we created
994 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag);
995 if (drc->drc_real_ds != drc->drc_logical_ds) {
996 dsl_dataset_close(drc->drc_logical_ds,
997 DS_MODE_STANDARD, dmu_recv_tag);
1001 * offline incremental: rollback to most recent snapshot.
1003 int lmode = DS_MODE_PRIMARY;
1004 if (dsl_dataset_tryupgrade(drc->drc_real_ds,
1005 DS_MODE_PRIMARY, DS_MODE_EXCLUSIVE)) {
1006 lmode = DS_MODE_EXCLUSIVE;
1007 (void) dsl_dataset_rollback(drc->drc_real_ds,
1010 dsl_dataset_close(drc->drc_real_ds, lmode, FTAG);
1015 * NB: callers *must* call dmu_recv_end() if this succeeds.
1018 dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp)
1020 struct restorearg ra = { 0 };
1021 dmu_replay_record_t *drr;
1025 if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
1029 /* compute checksum of drr_begin record */
1030 dmu_replay_record_t *drr;
1031 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
1033 drr->drr_type = DRR_BEGIN;
1034 drr->drr_u.drr_begin = *drc->drc_drrb;
1036 fletcher_4_incremental_byteswap(drr,
1037 sizeof (dmu_replay_record_t), &ra.cksum);
1039 fletcher_4_incremental_native(drr,
1040 sizeof (dmu_replay_record_t), &ra.cksum);
1042 kmem_free(drr, sizeof (dmu_replay_record_t));
1046 struct drr_begin *drrb = drc->drc_drrb;
1047 drrb->drr_magic = BSWAP_64(drrb->drr_magic);
1048 drrb->drr_version = BSWAP_64(drrb->drr_version);
1049 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
1050 drrb->drr_type = BSWAP_32(drrb->drr_type);
1051 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
1052 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
1058 ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
1060 /* these were verified in dmu_recv_begin */
1061 ASSERT(drc->drc_drrb->drr_version == DMU_BACKUP_STREAM_VERSION);
1062 ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES);
1065 * Open the objset we are modifying.
1067 VERIFY(dmu_objset_open_ds(drc->drc_real_ds, DMU_OST_ANY, &os) == 0);
1069 ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
1072 * Read records and process them.
1075 while (ra.err == 0 &&
1076 NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
1077 if (issig(JUSTLOOKING) && issig(FORREAL)) {
1083 backup_byteswap(drr);
1085 switch (drr->drr_type) {
1089 * We need to make a copy of the record header,
1090 * because restore_{object,write} may need to
1091 * restore_read(), which will invalidate drr.
1093 struct drr_object drro = drr->drr_u.drr_object;
1094 ra.err = restore_object(&ra, os, &drro);
1097 case DRR_FREEOBJECTS:
1099 struct drr_freeobjects drrfo =
1100 drr->drr_u.drr_freeobjects;
1101 ra.err = restore_freeobjects(&ra, os, &drrfo);
1106 struct drr_write drrw = drr->drr_u.drr_write;
1107 ra.err = restore_write(&ra, os, &drrw);
1112 struct drr_free drrf = drr->drr_u.drr_free;
1113 ra.err = restore_free(&ra, os, &drrf);
1118 struct drr_end drre = drr->drr_u.drr_end;
1120 * We compare against the *previous* checksum
1121 * value, because the stored checksum is of
1122 * everything before the DRR_END record.
1124 if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
1134 ASSERT(ra.err != 0);
1137 dmu_objset_close(os);
1141 * rollback or destroy what we created, so we don't
1142 * leave it in the restoring state.
1144 txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
1145 dmu_recv_abort_cleanup(drc);
1148 kmem_free(ra.buf, ra.bufsize);
1153 struct recvendsyncarg {
1155 uint64_t creation_time;
1160 recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx)
1162 dsl_dataset_t *ds = arg1;
1163 struct recvendsyncarg *resa = arg2;
1165 return (dsl_dataset_snapshot_check(ds, resa->tosnap, tx));
1169 recv_end_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
1171 dsl_dataset_t *ds = arg1;
1172 struct recvendsyncarg *resa = arg2;
1174 dsl_dataset_snapshot_sync(ds, resa->tosnap, cr, tx);
1176 /* set snapshot's creation time and guid */
1177 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
1178 ds->ds_prev->ds_phys->ds_creation_time = resa->creation_time;
1179 ds->ds_prev->ds_phys->ds_guid = resa->toguid;
1180 ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1182 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1183 ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1187 dmu_recv_end(dmu_recv_cookie_t *drc)
1193 * XXX hack; seems the ds is still dirty and
1194 * dsl_pool_zil_clean() expects it to have a ds_user_ptr (and
1195 * zil), but clone_swap() can close it.
1197 txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
1199 if (dsl_dataset_tryupgrade(drc->drc_real_ds,
1200 DS_MODE_PRIMARY, DS_MODE_EXCLUSIVE)) {
1201 lmode = DS_MODE_EXCLUSIVE;
1203 dmu_recv_abort_cleanup(drc);
1207 if (drc->drc_logical_ds != drc->drc_real_ds) {
1208 if (err == 0 && dsl_dataset_tryupgrade(drc->drc_logical_ds,
1209 DS_MODE_STANDARD, DS_MODE_EXCLUSIVE)) {
1210 lmode = DS_MODE_EXCLUSIVE;
1211 err = dsl_dataset_clone_swap(drc->drc_real_ds,
1212 drc->drc_logical_ds, drc->drc_force);
1214 lmode = DS_MODE_STANDARD;
1220 struct recvendsyncarg resa;
1222 resa.creation_time = drc->drc_drrb->drr_creation_time;
1223 resa.toguid = drc->drc_drrb->drr_toguid;
1224 resa.tosnap = drc->drc_tosnap;
1226 err = dsl_sync_task_do(drc->drc_real_ds->ds_dir->dd_pool,
1227 recv_end_check, recv_end_sync,
1228 drc->drc_logical_ds, &resa, 3);
1230 if (drc->drc_newfs) {
1231 ASSERT(drc->drc_logical_ds == drc->drc_real_ds);
1232 (void) dsl_dataset_destroy(drc->drc_real_ds,
1236 (void) dsl_dataset_rollback(drc->drc_logical_ds,
1242 if (drc->drc_logical_ds != drc->drc_real_ds) {
1243 /* dsl_dataset_destroy() will close the ds */
1244 (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag);
1246 /* close the hold from dmu_recv_begin */
1247 dsl_dataset_close(drc->drc_logical_ds, lmode, dmu_recv_tag);