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 2011 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2013 by Delphix. All rights reserved.
25 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2012, Martin Matuska <mm@FreeBSD.org>. 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/zfs_ioctl.h>
44 #include <sys/zio_checksum.h>
45 #include <sys/zfs_znode.h>
46 #include <zfs_fletcher.h>
49 #include <sys/zfs_onexit.h>
50 #include <sys/dmu_send.h>
51 #include <sys/dsl_destroy.h>
53 /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
54 int zfs_send_corrupt_data = B_FALSE;
56 static char *dmu_recv_tag = "dmu_recv_tag";
57 static const char *recv_clone_name = "%recv";
60 dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
62 dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset;
67 fletcher_4_incremental_native(buf, len, &dsp->dsa_zc);
73 auio.uio_segflg = UIO_SYSSPACE;
74 auio.uio_rw = UIO_WRITE;
75 auio.uio_offset = (off_t)-1;
76 auio.uio_td = dsp->dsa_td;
78 if (dsp->dsa_fp->f_type == DTYPE_VNODE)
80 dsp->dsa_err = fo_write(dsp->dsa_fp, &auio, dsp->dsa_td->td_ucred, 0,
83 fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__);
84 dsp->dsa_err = EOPNOTSUPP;
86 mutex_enter(&ds->ds_sendstream_lock);
88 mutex_exit(&ds->ds_sendstream_lock);
90 return (dsp->dsa_err);
94 dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
97 struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free);
99 if (length != -1ULL && offset + length < offset)
103 * If there is a pending op, but it's not PENDING_FREE, push it out,
104 * since free block aggregation can only be done for blocks of the
105 * same type (i.e., DRR_FREE records can only be aggregated with
106 * other DRR_FREE records. DRR_FREEOBJECTS records can only be
107 * aggregated with other DRR_FREEOBJECTS records.
109 if (dsp->dsa_pending_op != PENDING_NONE &&
110 dsp->dsa_pending_op != PENDING_FREE) {
111 if (dump_bytes(dsp, dsp->dsa_drr,
112 sizeof (dmu_replay_record_t)) != 0)
113 return (SET_ERROR(EINTR));
114 dsp->dsa_pending_op = PENDING_NONE;
117 if (dsp->dsa_pending_op == PENDING_FREE) {
119 * There should never be a PENDING_FREE if length is -1
120 * (because dump_dnode is the only place where this
121 * function is called with a -1, and only after flushing
122 * any pending record).
124 ASSERT(length != -1ULL);
126 * Check to see whether this free block can be aggregated
129 if (drrf->drr_object == object && drrf->drr_offset +
130 drrf->drr_length == offset) {
131 drrf->drr_length += length;
134 /* not a continuation. Push out pending record */
135 if (dump_bytes(dsp, dsp->dsa_drr,
136 sizeof (dmu_replay_record_t)) != 0)
137 return (SET_ERROR(EINTR));
138 dsp->dsa_pending_op = PENDING_NONE;
141 /* create a FREE record and make it pending */
142 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
143 dsp->dsa_drr->drr_type = DRR_FREE;
144 drrf->drr_object = object;
145 drrf->drr_offset = offset;
146 drrf->drr_length = length;
147 drrf->drr_toguid = dsp->dsa_toguid;
148 if (length == -1ULL) {
149 if (dump_bytes(dsp, dsp->dsa_drr,
150 sizeof (dmu_replay_record_t)) != 0)
151 return (SET_ERROR(EINTR));
153 dsp->dsa_pending_op = PENDING_FREE;
160 dump_data(dmu_sendarg_t *dsp, dmu_object_type_t type,
161 uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
163 struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write);
167 * If there is any kind of pending aggregation (currently either
168 * a grouping of free objects or free blocks), push it out to
169 * the stream, since aggregation can't be done across operations
170 * of different types.
172 if (dsp->dsa_pending_op != PENDING_NONE) {
173 if (dump_bytes(dsp, dsp->dsa_drr,
174 sizeof (dmu_replay_record_t)) != 0)
175 return (SET_ERROR(EINTR));
176 dsp->dsa_pending_op = PENDING_NONE;
178 /* write a DATA record */
179 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
180 dsp->dsa_drr->drr_type = DRR_WRITE;
181 drrw->drr_object = object;
182 drrw->drr_type = type;
183 drrw->drr_offset = offset;
184 drrw->drr_length = blksz;
185 drrw->drr_toguid = dsp->dsa_toguid;
186 drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
187 if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
188 drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
189 DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
190 DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
191 DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
192 drrw->drr_key.ddk_cksum = bp->blk_cksum;
194 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
195 return (SET_ERROR(EINTR));
196 if (dump_bytes(dsp, data, blksz) != 0)
197 return (SET_ERROR(EINTR));
202 dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data)
204 struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
206 if (dsp->dsa_pending_op != PENDING_NONE) {
207 if (dump_bytes(dsp, dsp->dsa_drr,
208 sizeof (dmu_replay_record_t)) != 0)
209 return (SET_ERROR(EINTR));
210 dsp->dsa_pending_op = PENDING_NONE;
213 /* write a SPILL record */
214 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
215 dsp->dsa_drr->drr_type = DRR_SPILL;
216 drrs->drr_object = object;
217 drrs->drr_length = blksz;
218 drrs->drr_toguid = dsp->dsa_toguid;
220 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)))
221 return (SET_ERROR(EINTR));
222 if (dump_bytes(dsp, data, blksz))
223 return (SET_ERROR(EINTR));
228 dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs)
230 struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects);
233 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
234 * push it out, since free block aggregation can only be done for
235 * blocks of the same type (i.e., DRR_FREE records can only be
236 * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
237 * can only be aggregated with other DRR_FREEOBJECTS records.
239 if (dsp->dsa_pending_op != PENDING_NONE &&
240 dsp->dsa_pending_op != PENDING_FREEOBJECTS) {
241 if (dump_bytes(dsp, dsp->dsa_drr,
242 sizeof (dmu_replay_record_t)) != 0)
243 return (SET_ERROR(EINTR));
244 dsp->dsa_pending_op = PENDING_NONE;
246 if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) {
248 * See whether this free object array can be aggregated
251 if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
252 drrfo->drr_numobjs += numobjs;
255 /* can't be aggregated. Push out pending record */
256 if (dump_bytes(dsp, dsp->dsa_drr,
257 sizeof (dmu_replay_record_t)) != 0)
258 return (SET_ERROR(EINTR));
259 dsp->dsa_pending_op = PENDING_NONE;
263 /* write a FREEOBJECTS record */
264 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
265 dsp->dsa_drr->drr_type = DRR_FREEOBJECTS;
266 drrfo->drr_firstobj = firstobj;
267 drrfo->drr_numobjs = numobjs;
268 drrfo->drr_toguid = dsp->dsa_toguid;
270 dsp->dsa_pending_op = PENDING_FREEOBJECTS;
276 dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp)
278 struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object);
280 if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
281 return (dump_freeobjects(dsp, object, 1));
283 if (dsp->dsa_pending_op != PENDING_NONE) {
284 if (dump_bytes(dsp, dsp->dsa_drr,
285 sizeof (dmu_replay_record_t)) != 0)
286 return (SET_ERROR(EINTR));
287 dsp->dsa_pending_op = PENDING_NONE;
290 /* write an OBJECT record */
291 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
292 dsp->dsa_drr->drr_type = DRR_OBJECT;
293 drro->drr_object = object;
294 drro->drr_type = dnp->dn_type;
295 drro->drr_bonustype = dnp->dn_bonustype;
296 drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
297 drro->drr_bonuslen = dnp->dn_bonuslen;
298 drro->drr_checksumtype = dnp->dn_checksum;
299 drro->drr_compress = dnp->dn_compress;
300 drro->drr_toguid = dsp->dsa_toguid;
302 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
303 return (SET_ERROR(EINTR));
305 if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
306 return (SET_ERROR(EINTR));
308 /* free anything past the end of the file */
309 if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) *
310 (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
311 return (SET_ERROR(EINTR));
312 if (dsp->dsa_err != 0)
313 return (SET_ERROR(EINTR));
317 #define BP_SPAN(dnp, level) \
318 (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
319 (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
323 backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
324 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
326 dmu_sendarg_t *dsp = arg;
327 dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
330 if (issig(JUSTLOOKING) && issig(FORREAL))
331 return (SET_ERROR(EINTR));
333 if (zb->zb_object != DMU_META_DNODE_OBJECT &&
334 DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
336 } else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) {
337 uint64_t span = BP_SPAN(dnp, zb->zb_level);
338 uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
339 err = dump_freeobjects(dsp, dnobj, span >> DNODE_SHIFT);
340 } else if (bp == NULL) {
341 uint64_t span = BP_SPAN(dnp, zb->zb_level);
342 err = dump_free(dsp, zb->zb_object, zb->zb_blkid * span, span);
343 } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
345 } else if (type == DMU_OT_DNODE) {
348 int blksz = BP_GET_LSIZE(bp);
349 uint32_t aflags = ARC_WAIT;
352 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
353 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
355 return (SET_ERROR(EIO));
358 for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
359 uint64_t dnobj = (zb->zb_blkid <<
360 (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
361 err = dump_dnode(dsp, dnobj, blk+i);
365 (void) arc_buf_remove_ref(abuf, &abuf);
366 } else if (type == DMU_OT_SA) {
367 uint32_t aflags = ARC_WAIT;
369 int blksz = BP_GET_LSIZE(bp);
371 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
372 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
374 return (SET_ERROR(EIO));
376 err = dump_spill(dsp, zb->zb_object, blksz, abuf->b_data);
377 (void) arc_buf_remove_ref(abuf, &abuf);
378 } else { /* it's a level-0 block of a regular object */
379 uint32_t aflags = ARC_WAIT;
381 int blksz = BP_GET_LSIZE(bp);
383 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
384 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
386 if (zfs_send_corrupt_data) {
387 /* Send a block filled with 0x"zfs badd bloc" */
388 abuf = arc_buf_alloc(spa, blksz, &abuf,
391 for (ptr = abuf->b_data;
392 (char *)ptr < (char *)abuf->b_data + blksz;
394 *ptr = 0x2f5baddb10c;
396 return (SET_ERROR(EIO));
400 err = dump_data(dsp, type, zb->zb_object, zb->zb_blkid * blksz,
401 blksz, bp, abuf->b_data);
402 (void) arc_buf_remove_ref(abuf, &abuf);
405 ASSERT(err == 0 || err == EINTR);
410 * Releases dp, ds, and fromds, using the specified tag.
413 dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *ds,
415 dsl_dataset_t *fromds, int outfd, vnode_t *vp, offset_t *off)
417 dsl_dataset_t *fromds, int outfd, struct file *fp, offset_t *off)
421 dmu_replay_record_t *drr;
424 uint64_t fromtxg = 0;
426 if (fromds != NULL && !dsl_dataset_is_before(ds, fromds)) {
427 dsl_dataset_rele(fromds, tag);
428 dsl_dataset_rele(ds, tag);
429 dsl_pool_rele(dp, tag);
430 return (SET_ERROR(EXDEV));
433 err = dmu_objset_from_ds(ds, &os);
436 dsl_dataset_rele(fromds, tag);
437 dsl_dataset_rele(ds, tag);
438 dsl_pool_rele(dp, tag);
442 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
443 drr->drr_type = DRR_BEGIN;
444 drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
445 DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
449 if (dmu_objset_type(os) == DMU_OST_ZFS) {
451 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) {
452 kmem_free(drr, sizeof (dmu_replay_record_t));
454 dsl_dataset_rele(fromds, tag);
455 dsl_dataset_rele(ds, tag);
456 dsl_pool_rele(dp, tag);
457 return (SET_ERROR(EINVAL));
459 if (version >= ZPL_VERSION_SA) {
460 DMU_SET_FEATUREFLAGS(
461 drr->drr_u.drr_begin.drr_versioninfo,
462 DMU_BACKUP_FEATURE_SA_SPILL);
467 drr->drr_u.drr_begin.drr_creation_time =
468 ds->ds_phys->ds_creation_time;
469 drr->drr_u.drr_begin.drr_type = dmu_objset_type(os);
470 if (fromds != NULL && ds->ds_dir != fromds->ds_dir)
471 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
472 drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
473 if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
474 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
477 drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
478 dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
480 if (fromds != NULL) {
481 fromtxg = fromds->ds_phys->ds_creation_txg;
482 dsl_dataset_rele(fromds, tag);
486 dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP);
489 dsp->dsa_outfd = outfd;
490 dsp->dsa_proc = curproc;
491 dsp->dsa_td = curthread;
495 dsp->dsa_toguid = ds->ds_phys->ds_guid;
496 ZIO_SET_CHECKSUM(&dsp->dsa_zc, 0, 0, 0, 0);
497 dsp->dsa_pending_op = PENDING_NONE;
499 mutex_enter(&ds->ds_sendstream_lock);
500 list_insert_head(&ds->ds_sendstreams, dsp);
501 mutex_exit(&ds->ds_sendstream_lock);
503 dsl_dataset_long_hold(ds, FTAG);
504 dsl_pool_rele(dp, tag);
506 if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) {
511 err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
514 if (dsp->dsa_pending_op != PENDING_NONE)
515 if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0)
516 err = SET_ERROR(EINTR);
519 if (err == EINTR && dsp->dsa_err != 0)
524 bzero(drr, sizeof (dmu_replay_record_t));
525 drr->drr_type = DRR_END;
526 drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc;
527 drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid;
529 if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) {
535 mutex_enter(&ds->ds_sendstream_lock);
536 list_remove(&ds->ds_sendstreams, dsp);
537 mutex_exit(&ds->ds_sendstream_lock);
539 kmem_free(drr, sizeof (dmu_replay_record_t));
540 kmem_free(dsp, sizeof (dmu_sendarg_t));
542 dsl_dataset_long_rele(ds, FTAG);
543 dsl_dataset_rele(ds, tag);
549 dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap,
551 int outfd, vnode_t *vp, offset_t *off)
553 int outfd, struct file *fp, offset_t *off)
558 dsl_dataset_t *fromds = NULL;
561 err = dsl_pool_hold(pool, FTAG, &dp);
565 err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds);
567 dsl_pool_rele(dp, FTAG);
572 err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds);
574 dsl_dataset_rele(ds, FTAG);
575 dsl_pool_rele(dp, FTAG);
580 return (dmu_send_impl(FTAG, dp, ds, fromds, outfd, fp, off));
584 dmu_send(const char *tosnap, const char *fromsnap,
586 int outfd, vnode_t *vp, offset_t *off)
588 int outfd, struct file *fp, offset_t *off)
593 dsl_dataset_t *fromds = NULL;
596 if (strchr(tosnap, '@') == NULL)
597 return (SET_ERROR(EINVAL));
598 if (fromsnap != NULL && strchr(fromsnap, '@') == NULL)
599 return (SET_ERROR(EINVAL));
601 err = dsl_pool_hold(tosnap, FTAG, &dp);
605 err = dsl_dataset_hold(dp, tosnap, FTAG, &ds);
607 dsl_pool_rele(dp, FTAG);
611 if (fromsnap != NULL) {
612 err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds);
614 dsl_dataset_rele(ds, FTAG);
615 dsl_pool_rele(dp, FTAG);
619 return (dmu_send_impl(FTAG, dp, ds, fromds, outfd, fp, off));
623 dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep)
625 dsl_pool_t *dp = ds->ds_dir->dd_pool;
629 ASSERT(dsl_pool_config_held(dp));
631 /* tosnap must be a snapshot */
632 if (!dsl_dataset_is_snapshot(ds))
633 return (SET_ERROR(EINVAL));
636 * fromsnap must be an earlier snapshot from the same fs as tosnap,
637 * or the origin's fs.
639 if (fromds != NULL && !dsl_dataset_is_before(ds, fromds))
640 return (SET_ERROR(EXDEV));
642 /* Get uncompressed size estimate of changed data. */
643 if (fromds == NULL) {
644 size = ds->ds_phys->ds_uncompressed_bytes;
647 err = dsl_dataset_space_written(fromds, ds,
648 &used, &comp, &size);
654 * Assume that space (both on-disk and in-stream) is dominated by
655 * data. We will adjust for indirect blocks and the copies property,
656 * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
660 * Subtract out approximate space used by indirect blocks.
661 * Assume most space is used by data blocks (non-indirect, non-dnode).
662 * Assume all blocks are recordsize. Assume ditto blocks and
663 * internal fragmentation counter out compression.
665 * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
666 * block, which we observe in practice.
669 err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize);
672 size -= size / recordsize * sizeof (blkptr_t);
674 /* Add in the space for the record associated with each block. */
675 size += size / recordsize * sizeof (dmu_replay_record_t);
682 typedef struct dmu_recv_begin_arg {
683 const char *drba_origin;
684 dmu_recv_cookie_t *drba_cookie;
686 } dmu_recv_begin_arg_t;
689 recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds,
694 dsl_pool_t *dp = ds->ds_dir->dd_pool;
696 /* must not have any changes since most recent snapshot */
697 if (!drba->drba_cookie->drc_force &&
698 dsl_dataset_modified_since_lastsnap(ds))
699 return (SET_ERROR(ETXTBSY));
701 /* temporary clone name must not exist */
702 error = zap_lookup(dp->dp_meta_objset,
703 ds->ds_dir->dd_phys->dd_child_dir_zapobj, recv_clone_name,
706 return (error == 0 ? EBUSY : error);
708 /* new snapshot name must not exist */
709 error = zap_lookup(dp->dp_meta_objset,
710 ds->ds_phys->ds_snapnames_zapobj, drba->drba_cookie->drc_tosnap,
713 return (error == 0 ? EEXIST : error);
716 /* if incremental, most recent snapshot must match fromguid */
717 if (ds->ds_prev == NULL)
718 return (SET_ERROR(ENODEV));
721 * most recent snapshot must match fromguid, or there are no
722 * changes since the fromguid one
724 if (ds->ds_prev->ds_phys->ds_guid != fromguid) {
725 uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth;
726 uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj;
729 error = dsl_dataset_hold_obj(dp, obj, FTAG,
732 return (SET_ERROR(ENODEV));
733 if (snap->ds_phys->ds_creation_txg < birth) {
734 dsl_dataset_rele(snap, FTAG);
735 return (SET_ERROR(ENODEV));
737 if (snap->ds_phys->ds_guid == fromguid) {
738 dsl_dataset_rele(snap, FTAG);
741 obj = snap->ds_phys->ds_prev_snap_obj;
742 dsl_dataset_rele(snap, FTAG);
745 return (SET_ERROR(ENODEV));
748 /* if full, most recent snapshot must be $ORIGIN */
749 if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL)
750 return (SET_ERROR(ENODEV));
758 dmu_recv_begin_check(void *arg, dmu_tx_t *tx)
760 dmu_recv_begin_arg_t *drba = arg;
761 dsl_pool_t *dp = dmu_tx_pool(tx);
762 struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
763 uint64_t fromguid = drrb->drr_fromguid;
764 int flags = drrb->drr_flags;
767 const char *tofs = drba->drba_cookie->drc_tofs;
769 /* already checked */
770 ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC);
772 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
773 DMU_COMPOUNDSTREAM ||
774 drrb->drr_type >= DMU_OST_NUMTYPES ||
775 ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL))
776 return (SET_ERROR(EINVAL));
778 /* Verify pool version supports SA if SA_SPILL feature set */
779 if ((DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) &
780 DMU_BACKUP_FEATURE_SA_SPILL) &&
781 spa_version(dp->dp_spa) < SPA_VERSION_SA) {
782 return (SET_ERROR(ENOTSUP));
785 error = dsl_dataset_hold(dp, tofs, FTAG, &ds);
787 /* target fs already exists; recv into temp clone */
789 /* Can't recv a clone into an existing fs */
790 if (flags & DRR_FLAG_CLONE) {
791 dsl_dataset_rele(ds, FTAG);
792 return (SET_ERROR(EINVAL));
795 error = recv_begin_check_existing_impl(drba, ds, fromguid);
796 dsl_dataset_rele(ds, FTAG);
797 } else if (error == ENOENT) {
798 /* target fs does not exist; must be a full backup or clone */
799 char buf[MAXNAMELEN];
802 * If it's a non-clone incremental, we are missing the
803 * target fs, so fail the recv.
805 if (fromguid != 0 && !(flags & DRR_FLAG_CLONE))
806 return (SET_ERROR(ENOENT));
808 /* Open the parent of tofs */
809 ASSERT3U(strlen(tofs), <, MAXNAMELEN);
810 (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1);
811 error = dsl_dataset_hold(dp, buf, FTAG, &ds);
815 if (drba->drba_origin != NULL) {
816 dsl_dataset_t *origin;
817 error = dsl_dataset_hold(dp, drba->drba_origin,
820 dsl_dataset_rele(ds, FTAG);
823 if (!dsl_dataset_is_snapshot(origin)) {
824 dsl_dataset_rele(origin, FTAG);
825 dsl_dataset_rele(ds, FTAG);
826 return (SET_ERROR(EINVAL));
828 if (origin->ds_phys->ds_guid != fromguid) {
829 dsl_dataset_rele(origin, FTAG);
830 dsl_dataset_rele(ds, FTAG);
831 return (SET_ERROR(ENODEV));
833 dsl_dataset_rele(origin, FTAG);
835 dsl_dataset_rele(ds, FTAG);
842 dmu_recv_begin_sync(void *arg, dmu_tx_t *tx)
844 dmu_recv_begin_arg_t *drba = arg;
845 dsl_pool_t *dp = dmu_tx_pool(tx);
846 struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
847 const char *tofs = drba->drba_cookie->drc_tofs;
848 dsl_dataset_t *ds, *newds;
853 crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ?
854 DS_FLAG_CI_DATASET : 0;
856 error = dsl_dataset_hold(dp, tofs, FTAG, &ds);
858 /* create temporary clone */
859 dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name,
860 ds->ds_prev, crflags, drba->drba_cred, tx);
861 dsl_dataset_rele(ds, FTAG);
865 dsl_dataset_t *origin = NULL;
867 VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail));
869 if (drba->drba_origin != NULL) {
870 VERIFY0(dsl_dataset_hold(dp, drba->drba_origin,
874 /* Create new dataset. */
875 dsobj = dsl_dataset_create_sync(dd,
876 strrchr(tofs, '/') + 1,
877 origin, crflags, drba->drba_cred, tx);
879 dsl_dataset_rele(origin, FTAG);
880 dsl_dir_rele(dd, FTAG);
881 drba->drba_cookie->drc_newfs = B_TRUE;
883 VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds));
885 dmu_buf_will_dirty(newds->ds_dbuf, tx);
886 newds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT;
889 * If we actually created a non-clone, we need to create the
890 * objset in our new dataset.
892 if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) {
893 (void) dmu_objset_create_impl(dp->dp_spa,
894 newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx);
897 drba->drba_cookie->drc_ds = newds;
899 spa_history_log_internal_ds(newds, "receive", tx, "");
903 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
904 * succeeds; otherwise we will leak the holds on the datasets.
907 dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb,
908 boolean_t force, char *origin, dmu_recv_cookie_t *drc)
910 dmu_recv_begin_arg_t drba = { 0 };
911 dmu_replay_record_t *drr;
913 bzero(drc, sizeof (dmu_recv_cookie_t));
914 drc->drc_drrb = drrb;
915 drc->drc_tosnap = tosnap;
916 drc->drc_tofs = tofs;
917 drc->drc_force = force;
919 if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
920 drc->drc_byteswap = B_TRUE;
921 else if (drrb->drr_magic != DMU_BACKUP_MAGIC)
922 return (SET_ERROR(EINVAL));
924 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
925 drr->drr_type = DRR_BEGIN;
926 drr->drr_u.drr_begin = *drc->drc_drrb;
927 if (drc->drc_byteswap) {
928 fletcher_4_incremental_byteswap(drr,
929 sizeof (dmu_replay_record_t), &drc->drc_cksum);
931 fletcher_4_incremental_native(drr,
932 sizeof (dmu_replay_record_t), &drc->drc_cksum);
934 kmem_free(drr, sizeof (dmu_replay_record_t));
936 if (drc->drc_byteswap) {
937 drrb->drr_magic = BSWAP_64(drrb->drr_magic);
938 drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
939 drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
940 drrb->drr_type = BSWAP_32(drrb->drr_type);
941 drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
942 drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
945 drba.drba_origin = origin;
946 drba.drba_cookie = drc;
947 drba.drba_cred = CRED();
949 return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync,
960 int bufsize; /* amount of memory allocated for buf */
962 avl_tree_t *guid_to_ds_map;
965 typedef struct guid_map_entry {
967 dsl_dataset_t *gme_ds;
972 guid_compare(const void *arg1, const void *arg2)
974 const guid_map_entry_t *gmep1 = arg1;
975 const guid_map_entry_t *gmep2 = arg2;
977 if (gmep1->guid < gmep2->guid)
979 else if (gmep1->guid > gmep2->guid)
985 free_guid_map_onexit(void *arg)
987 avl_tree_t *ca = arg;
989 guid_map_entry_t *gmep;
991 while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
992 dsl_dataset_long_rele(gmep->gme_ds, gmep);
993 dsl_dataset_rele(gmep->gme_ds, gmep);
994 kmem_free(gmep, sizeof (guid_map_entry_t));
997 kmem_free(ca, sizeof (avl_tree_t));
1001 restore_bytes(struct restorearg *ra, void *buf, int len, off_t off, ssize_t *resid)
1007 aiov.iov_base = buf;
1009 auio.uio_iov = &aiov;
1010 auio.uio_iovcnt = 1;
1011 auio.uio_resid = len;
1012 auio.uio_segflg = UIO_SYSSPACE;
1013 auio.uio_rw = UIO_READ;
1014 auio.uio_offset = off;
1015 auio.uio_td = ra->td;
1017 error = fo_read(ra->fp, &auio, ra->td->td_ucred, FOF_OFFSET, ra->td);
1019 fprintf(stderr, "%s: returning EOPNOTSUPP\n", __func__);
1022 *resid = auio.uio_resid;
1027 restore_read(struct restorearg *ra, int len)
1032 /* some things will require 8-byte alignment, so everything must */
1035 while (done < len) {
1038 ra->err = restore_bytes(ra, (caddr_t)ra->buf + done,
1039 len - done, ra->voff, &resid);
1041 if (resid == len - done)
1042 ra->err = SET_ERROR(EINVAL);
1043 ra->voff += len - done - resid;
1049 ASSERT3U(done, ==, len);
1052 fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
1054 fletcher_4_incremental_native(rv, len, &ra->cksum);
1059 backup_byteswap(dmu_replay_record_t *drr)
1061 #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
1062 #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
1063 drr->drr_type = BSWAP_32(drr->drr_type);
1064 drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
1065 switch (drr->drr_type) {
1067 DO64(drr_begin.drr_magic);
1068 DO64(drr_begin.drr_versioninfo);
1069 DO64(drr_begin.drr_creation_time);
1070 DO32(drr_begin.drr_type);
1071 DO32(drr_begin.drr_flags);
1072 DO64(drr_begin.drr_toguid);
1073 DO64(drr_begin.drr_fromguid);
1076 DO64(drr_object.drr_object);
1077 /* DO64(drr_object.drr_allocation_txg); */
1078 DO32(drr_object.drr_type);
1079 DO32(drr_object.drr_bonustype);
1080 DO32(drr_object.drr_blksz);
1081 DO32(drr_object.drr_bonuslen);
1082 DO64(drr_object.drr_toguid);
1084 case DRR_FREEOBJECTS:
1085 DO64(drr_freeobjects.drr_firstobj);
1086 DO64(drr_freeobjects.drr_numobjs);
1087 DO64(drr_freeobjects.drr_toguid);
1090 DO64(drr_write.drr_object);
1091 DO32(drr_write.drr_type);
1092 DO64(drr_write.drr_offset);
1093 DO64(drr_write.drr_length);
1094 DO64(drr_write.drr_toguid);
1095 DO64(drr_write.drr_key.ddk_cksum.zc_word[0]);
1096 DO64(drr_write.drr_key.ddk_cksum.zc_word[1]);
1097 DO64(drr_write.drr_key.ddk_cksum.zc_word[2]);
1098 DO64(drr_write.drr_key.ddk_cksum.zc_word[3]);
1099 DO64(drr_write.drr_key.ddk_prop);
1101 case DRR_WRITE_BYREF:
1102 DO64(drr_write_byref.drr_object);
1103 DO64(drr_write_byref.drr_offset);
1104 DO64(drr_write_byref.drr_length);
1105 DO64(drr_write_byref.drr_toguid);
1106 DO64(drr_write_byref.drr_refguid);
1107 DO64(drr_write_byref.drr_refobject);
1108 DO64(drr_write_byref.drr_refoffset);
1109 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]);
1110 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]);
1111 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]);
1112 DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]);
1113 DO64(drr_write_byref.drr_key.ddk_prop);
1116 DO64(drr_free.drr_object);
1117 DO64(drr_free.drr_offset);
1118 DO64(drr_free.drr_length);
1119 DO64(drr_free.drr_toguid);
1122 DO64(drr_spill.drr_object);
1123 DO64(drr_spill.drr_length);
1124 DO64(drr_spill.drr_toguid);
1127 DO64(drr_end.drr_checksum.zc_word[0]);
1128 DO64(drr_end.drr_checksum.zc_word[1]);
1129 DO64(drr_end.drr_checksum.zc_word[2]);
1130 DO64(drr_end.drr_checksum.zc_word[3]);
1131 DO64(drr_end.drr_toguid);
1139 restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
1145 if (drro->drr_type == DMU_OT_NONE ||
1146 !DMU_OT_IS_VALID(drro->drr_type) ||
1147 !DMU_OT_IS_VALID(drro->drr_bonustype) ||
1148 drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
1149 drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
1150 P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
1151 drro->drr_blksz < SPA_MINBLOCKSIZE ||
1152 drro->drr_blksz > SPA_MAXBLOCKSIZE ||
1153 drro->drr_bonuslen > DN_MAX_BONUSLEN) {
1154 return (SET_ERROR(EINVAL));
1157 err = dmu_object_info(os, drro->drr_object, NULL);
1159 if (err != 0 && err != ENOENT)
1160 return (SET_ERROR(EINVAL));
1162 if (drro->drr_bonuslen) {
1163 data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
1168 if (err == ENOENT) {
1169 /* currently free, want to be allocated */
1170 tx = dmu_tx_create(os);
1171 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1172 err = dmu_tx_assign(tx, TXG_WAIT);
1177 err = dmu_object_claim(os, drro->drr_object,
1178 drro->drr_type, drro->drr_blksz,
1179 drro->drr_bonustype, drro->drr_bonuslen, tx);
1182 /* currently allocated, want to be allocated */
1183 err = dmu_object_reclaim(os, drro->drr_object,
1184 drro->drr_type, drro->drr_blksz,
1185 drro->drr_bonustype, drro->drr_bonuslen);
1188 return (SET_ERROR(EINVAL));
1191 tx = dmu_tx_create(os);
1192 dmu_tx_hold_bonus(tx, drro->drr_object);
1193 err = dmu_tx_assign(tx, TXG_WAIT);
1199 dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
1201 dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
1206 VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
1207 dmu_buf_will_dirty(db, tx);
1209 ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
1210 bcopy(data, db->db_data, drro->drr_bonuslen);
1212 dmu_object_byteswap_t byteswap =
1213 DMU_OT_BYTESWAP(drro->drr_bonustype);
1214 dmu_ot_byteswap[byteswap].ob_func(db->db_data,
1215 drro->drr_bonuslen);
1217 dmu_buf_rele(db, FTAG);
1225 restore_freeobjects(struct restorearg *ra, objset_t *os,
1226 struct drr_freeobjects *drrfo)
1230 if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
1231 return (SET_ERROR(EINVAL));
1233 for (obj = drrfo->drr_firstobj;
1234 obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
1235 (void) dmu_object_next(os, &obj, FALSE, 0)) {
1238 if (dmu_object_info(os, obj, NULL) != 0)
1241 err = dmu_free_object(os, obj);
1249 restore_write(struct restorearg *ra, objset_t *os,
1250 struct drr_write *drrw)
1256 if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
1257 !DMU_OT_IS_VALID(drrw->drr_type))
1258 return (SET_ERROR(EINVAL));
1260 data = restore_read(ra, drrw->drr_length);
1264 if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
1265 return (SET_ERROR(EINVAL));
1267 tx = dmu_tx_create(os);
1269 dmu_tx_hold_write(tx, drrw->drr_object,
1270 drrw->drr_offset, drrw->drr_length);
1271 err = dmu_tx_assign(tx, TXG_WAIT);
1277 dmu_object_byteswap_t byteswap =
1278 DMU_OT_BYTESWAP(drrw->drr_type);
1279 dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length);
1281 dmu_write(os, drrw->drr_object,
1282 drrw->drr_offset, drrw->drr_length, data, tx);
1288 * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
1289 * streams to refer to a copy of the data that is already on the
1290 * system because it came in earlier in the stream. This function
1291 * finds the earlier copy of the data, and uses that copy instead of
1292 * data from the stream to fulfill this write.
1295 restore_write_byref(struct restorearg *ra, objset_t *os,
1296 struct drr_write_byref *drrwbr)
1300 guid_map_entry_t gmesrch;
1301 guid_map_entry_t *gmep;
1303 objset_t *ref_os = NULL;
1306 if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
1307 return (SET_ERROR(EINVAL));
1310 * If the GUID of the referenced dataset is different from the
1311 * GUID of the target dataset, find the referenced dataset.
1313 if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
1314 gmesrch.guid = drrwbr->drr_refguid;
1315 if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
1317 return (SET_ERROR(EINVAL));
1319 if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
1320 return (SET_ERROR(EINVAL));
1325 if (err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
1326 drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH))
1329 tx = dmu_tx_create(os);
1331 dmu_tx_hold_write(tx, drrwbr->drr_object,
1332 drrwbr->drr_offset, drrwbr->drr_length);
1333 err = dmu_tx_assign(tx, TXG_WAIT);
1338 dmu_write(os, drrwbr->drr_object,
1339 drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
1340 dmu_buf_rele(dbp, FTAG);
1346 restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
1350 dmu_buf_t *db, *db_spill;
1353 if (drrs->drr_length < SPA_MINBLOCKSIZE ||
1354 drrs->drr_length > SPA_MAXBLOCKSIZE)
1355 return (SET_ERROR(EINVAL));
1357 data = restore_read(ra, drrs->drr_length);
1361 if (dmu_object_info(os, drrs->drr_object, NULL) != 0)
1362 return (SET_ERROR(EINVAL));
1364 VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db));
1365 if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
1366 dmu_buf_rele(db, FTAG);
1370 tx = dmu_tx_create(os);
1372 dmu_tx_hold_spill(tx, db->db_object);
1374 err = dmu_tx_assign(tx, TXG_WAIT);
1376 dmu_buf_rele(db, FTAG);
1377 dmu_buf_rele(db_spill, FTAG);
1381 dmu_buf_will_dirty(db_spill, tx);
1383 if (db_spill->db_size < drrs->drr_length)
1384 VERIFY(0 == dbuf_spill_set_blksz(db_spill,
1385 drrs->drr_length, tx));
1386 bcopy(data, db_spill->db_data, drrs->drr_length);
1388 dmu_buf_rele(db, FTAG);
1389 dmu_buf_rele(db_spill, FTAG);
1397 restore_free(struct restorearg *ra, objset_t *os,
1398 struct drr_free *drrf)
1402 if (drrf->drr_length != -1ULL &&
1403 drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
1404 return (SET_ERROR(EINVAL));
1406 if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
1407 return (SET_ERROR(EINVAL));
1409 err = dmu_free_long_range(os, drrf->drr_object,
1410 drrf->drr_offset, drrf->drr_length);
1414 /* used to destroy the drc_ds on error */
1416 dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc)
1418 char name[MAXNAMELEN];
1419 dsl_dataset_name(drc->drc_ds, name);
1420 dsl_dataset_disown(drc->drc_ds, dmu_recv_tag);
1421 (void) dsl_destroy_head(name);
1425 * NB: callers *must* call dmu_recv_end() if this succeeds.
1428 dmu_recv_stream(dmu_recv_cookie_t *drc, struct file *fp, offset_t *voffp,
1429 int cleanup_fd, uint64_t *action_handlep)
1431 struct restorearg ra = { 0 };
1432 dmu_replay_record_t *drr;
1437 ra.byteswap = drc->drc_byteswap;
1438 ra.cksum = drc->drc_cksum;
1443 ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
1445 /* these were verified in dmu_recv_begin */
1446 ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==,
1448 ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES);
1451 * Open the objset we are modifying.
1453 VERIFY0(dmu_objset_from_ds(drc->drc_ds, &os));
1455 ASSERT(drc->drc_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
1457 featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
1459 /* if this stream is dedup'ed, set up the avl tree for guid mapping */
1460 if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
1463 if (cleanup_fd == -1) {
1464 ra.err = SET_ERROR(EBADF);
1467 ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor);
1473 if (*action_handlep == 0) {
1475 kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
1476 avl_create(ra.guid_to_ds_map, guid_compare,
1477 sizeof (guid_map_entry_t),
1478 offsetof(guid_map_entry_t, avlnode));
1479 ra.err = zfs_onexit_add_cb(minor,
1480 free_guid_map_onexit, ra.guid_to_ds_map,
1485 ra.err = zfs_onexit_cb_data(minor, *action_handlep,
1486 (void **)&ra.guid_to_ds_map);
1491 drc->drc_guid_to_ds_map = ra.guid_to_ds_map;
1495 * Read records and process them.
1498 while (ra.err == 0 &&
1499 NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
1500 if (issig(JUSTLOOKING) && issig(FORREAL)) {
1501 ra.err = SET_ERROR(EINTR);
1506 backup_byteswap(drr);
1508 switch (drr->drr_type) {
1512 * We need to make a copy of the record header,
1513 * because restore_{object,write} may need to
1514 * restore_read(), which will invalidate drr.
1516 struct drr_object drro = drr->drr_u.drr_object;
1517 ra.err = restore_object(&ra, os, &drro);
1520 case DRR_FREEOBJECTS:
1522 struct drr_freeobjects drrfo =
1523 drr->drr_u.drr_freeobjects;
1524 ra.err = restore_freeobjects(&ra, os, &drrfo);
1529 struct drr_write drrw = drr->drr_u.drr_write;
1530 ra.err = restore_write(&ra, os, &drrw);
1533 case DRR_WRITE_BYREF:
1535 struct drr_write_byref drrwbr =
1536 drr->drr_u.drr_write_byref;
1537 ra.err = restore_write_byref(&ra, os, &drrwbr);
1542 struct drr_free drrf = drr->drr_u.drr_free;
1543 ra.err = restore_free(&ra, os, &drrf);
1548 struct drr_end drre = drr->drr_u.drr_end;
1550 * We compare against the *previous* checksum
1551 * value, because the stored checksum is of
1552 * everything before the DRR_END record.
1554 if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
1555 ra.err = SET_ERROR(ECKSUM);
1560 struct drr_spill drrs = drr->drr_u.drr_spill;
1561 ra.err = restore_spill(&ra, os, &drrs);
1565 ra.err = SET_ERROR(EINVAL);
1570 ASSERT(ra.err != 0);
1573 if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
1574 zfs_onexit_fd_rele(cleanup_fd);
1578 * destroy what we created, so we don't leave it in the
1579 * inconsistent restoring state.
1581 dmu_recv_cleanup_ds(drc);
1584 kmem_free(ra.buf, ra.bufsize);
1590 dmu_recv_end_check(void *arg, dmu_tx_t *tx)
1592 dmu_recv_cookie_t *drc = arg;
1593 dsl_pool_t *dp = dmu_tx_pool(tx);
1596 ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag);
1598 if (!drc->drc_newfs) {
1599 dsl_dataset_t *origin_head;
1601 error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head);
1604 error = dsl_dataset_clone_swap_check_impl(drc->drc_ds,
1605 origin_head, drc->drc_force);
1607 dsl_dataset_rele(origin_head, FTAG);
1610 error = dsl_dataset_snapshot_check_impl(origin_head,
1611 drc->drc_tosnap, tx);
1612 dsl_dataset_rele(origin_head, FTAG);
1616 error = dsl_destroy_head_check_impl(drc->drc_ds, 1);
1618 error = dsl_dataset_snapshot_check_impl(drc->drc_ds,
1619 drc->drc_tosnap, tx);
1625 dmu_recv_end_sync(void *arg, dmu_tx_t *tx)
1627 dmu_recv_cookie_t *drc = arg;
1628 dsl_pool_t *dp = dmu_tx_pool(tx);
1630 spa_history_log_internal_ds(drc->drc_ds, "finish receiving",
1631 tx, "snap=%s", drc->drc_tosnap);
1633 if (!drc->drc_newfs) {
1634 dsl_dataset_t *origin_head;
1636 VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG,
1638 dsl_dataset_clone_swap_sync_impl(drc->drc_ds,
1640 dsl_dataset_snapshot_sync_impl(origin_head,
1641 drc->drc_tosnap, tx);
1643 /* set snapshot's creation time and guid */
1644 dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx);
1645 origin_head->ds_prev->ds_phys->ds_creation_time =
1646 drc->drc_drrb->drr_creation_time;
1647 origin_head->ds_prev->ds_phys->ds_guid =
1648 drc->drc_drrb->drr_toguid;
1649 origin_head->ds_prev->ds_phys->ds_flags &=
1650 ~DS_FLAG_INCONSISTENT;
1652 dmu_buf_will_dirty(origin_head->ds_dbuf, tx);
1653 origin_head->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1655 dsl_dataset_rele(origin_head, FTAG);
1656 dsl_destroy_head_sync_impl(drc->drc_ds, tx);
1658 dsl_dataset_t *ds = drc->drc_ds;
1660 dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx);
1662 /* set snapshot's creation time and guid */
1663 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
1664 ds->ds_prev->ds_phys->ds_creation_time =
1665 drc->drc_drrb->drr_creation_time;
1666 ds->ds_prev->ds_phys->ds_guid = drc->drc_drrb->drr_toguid;
1667 ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1669 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1670 ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
1672 drc->drc_newsnapobj = drc->drc_ds->ds_phys->ds_prev_snap_obj;
1674 * Release the hold from dmu_recv_begin. This must be done before
1675 * we return to open context, so that when we free the dataset's dnode,
1676 * we can evict its bonus buffer.
1678 dsl_dataset_disown(drc->drc_ds, dmu_recv_tag);
1683 add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj)
1686 dsl_dataset_t *snapds;
1687 guid_map_entry_t *gmep;
1690 ASSERT(guid_map != NULL);
1692 err = dsl_pool_hold(name, FTAG, &dp);
1695 gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP);
1696 err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds);
1698 gmep->guid = snapds->ds_phys->ds_guid;
1699 gmep->gme_ds = snapds;
1700 avl_add(guid_map, gmep);
1701 dsl_dataset_long_hold(snapds, gmep);
1703 kmem_free(gmep, sizeof (*gmep));
1705 dsl_pool_rele(dp, FTAG);
1709 static int dmu_recv_end_modified_blocks = 3;
1712 dmu_recv_existing_end(dmu_recv_cookie_t *drc)
1715 char name[MAXNAMELEN];
1719 * We will be destroying the ds; make sure its origin is unmounted if
1722 dsl_dataset_name(drc->drc_ds, name);
1723 zfs_destroy_unmount_origin(name);
1726 error = dsl_sync_task(drc->drc_tofs,
1727 dmu_recv_end_check, dmu_recv_end_sync, drc,
1728 dmu_recv_end_modified_blocks);
1731 dmu_recv_cleanup_ds(drc);
1736 dmu_recv_new_end(dmu_recv_cookie_t *drc)
1740 error = dsl_sync_task(drc->drc_tofs,
1741 dmu_recv_end_check, dmu_recv_end_sync, drc,
1742 dmu_recv_end_modified_blocks);
1745 dmu_recv_cleanup_ds(drc);
1746 } else if (drc->drc_guid_to_ds_map != NULL) {
1747 (void) add_ds_to_guidmap(drc->drc_tofs,
1748 drc->drc_guid_to_ds_map,
1749 drc->drc_newsnapobj);
1755 dmu_recv_end(dmu_recv_cookie_t *drc)
1758 return (dmu_recv_new_end(drc));
1760 return (dmu_recv_existing_end(drc));