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OpenZFS 7262 - remove seq from zfs_receive_010.ksh
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CommitLineData
34dc7c2f
BB
1/*
2 * CDDL HEADER START
3 *
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.
7 *
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.
12 *
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]
18 *
19 * CDDL HEADER END
20 */
21/*
428870ff 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
8d35c149 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
e6d3a843 24 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
788eb90c 25 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
47dfff3b 26 * Copyright 2014 HybridCluster. All rights reserved.
b607405f 27 * Copyright 2016 RackTop Systems.
a0bd735a 28 * Copyright (c) 2016 Actifio, Inc. All rights reserved.
8d35c149 29 */
34dc7c2f 30
34dc7c2f
BB
31#include <sys/dmu.h>
32#include <sys/dmu_impl.h>
33#include <sys/dmu_tx.h>
34#include <sys/dbuf.h>
35#include <sys/dnode.h>
36#include <sys/zfs_context.h>
37#include <sys/dmu_objset.h>
38#include <sys/dmu_traverse.h>
39#include <sys/dsl_dataset.h>
40#include <sys/dsl_dir.h>
428870ff 41#include <sys/dsl_prop.h>
34dc7c2f
BB
42#include <sys/dsl_pool.h>
43#include <sys/dsl_synctask.h>
044baf00 44#include <sys/spa_impl.h>
34dc7c2f
BB
45#include <sys/zfs_ioctl.h>
46#include <sys/zap.h>
47#include <sys/zio_checksum.h>
428870ff
BB
48#include <sys/zfs_znode.h>
49#include <zfs_fletcher.h>
50#include <sys/avl.h>
51#include <sys/ddt.h>
572e2857 52#include <sys/zfs_onexit.h>
13fe0198
MA
53#include <sys/dmu_send.h>
54#include <sys/dsl_destroy.h>
9b67f605 55#include <sys/blkptr.h>
da536844 56#include <sys/dsl_bookmark.h>
9b67f605 57#include <sys/zfeature.h>
fcff0f35 58#include <sys/bqueue.h>
a0bd735a 59#include <sys/zvol.h>
f74b821a 60#include <sys/policy.h>
34dc7c2f 61
330d06f9
MA
62/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
63int zfs_send_corrupt_data = B_FALSE;
fcff0f35
PD
64int zfs_send_queue_length = 16 * 1024 * 1024;
65int zfs_recv_queue_length = 16 * 1024 * 1024;
b607405f
AS
66/* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */
67int zfs_send_set_freerecords_bit = B_TRUE;
330d06f9 68
34dc7c2f 69static char *dmu_recv_tag = "dmu_recv_tag";
47dfff3b 70const char *recv_clone_name = "%recv";
34dc7c2f 71
fcff0f35
PD
72#define BP_SPAN(datablkszsec, indblkshift, level) \
73 (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \
74 (level) * (indblkshift - SPA_BLKPTRSHIFT)))
75
47dfff3b
MA
76static void byteswap_record(dmu_replay_record_t *drr);
77
fcff0f35
PD
78struct send_thread_arg {
79 bqueue_t q;
80 dsl_dataset_t *ds; /* Dataset to traverse */
81 uint64_t fromtxg; /* Traverse from this txg */
82 int flags; /* flags to pass to traverse_dataset */
83 int error_code;
84 boolean_t cancel;
47dfff3b 85 zbookmark_phys_t resume;
fcff0f35
PD
86};
87
88struct send_block_record {
89 boolean_t eos_marker; /* Marks the end of the stream */
90 blkptr_t bp;
91 zbookmark_phys_t zb;
92 uint8_t indblkshift;
93 uint16_t datablkszsec;
94 bqueue_node_t ln;
95};
96
044baf00
BB
97typedef struct dump_bytes_io {
98 dmu_sendarg_t *dbi_dsp;
99 void *dbi_buf;
100 int dbi_len;
101} dump_bytes_io_t;
102
103static void
b58986ee 104dump_bytes_cb(void *arg)
34dc7c2f 105{
044baf00
BB
106 dump_bytes_io_t *dbi = (dump_bytes_io_t *)arg;
107 dmu_sendarg_t *dsp = dbi->dbi_dsp;
47dfff3b 108 dsl_dataset_t *ds = dmu_objset_ds(dsp->dsa_os);
34dc7c2f 109 ssize_t resid; /* have to get resid to get detailed errno */
f8866f8a
ER
110
111 /*
112 * The code does not rely on this (len being a multiple of 8). We keep
113 * this assertion because of the corresponding assertion in
114 * receive_read(). Keeping this assertion ensures that we do not
115 * inadvertently break backwards compatibility (causing the assertion
116 * in receive_read() to trigger on old software).
117 *
118 * Removing the assertions could be rolled into a new feature that uses
119 * data that isn't 8-byte aligned; if the assertions were removed, a
120 * feature flag would have to be added.
121 */
122
c99c9001 123 ASSERT0(dbi->dbi_len % 8);
34dc7c2f 124
37abac6d 125 dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
044baf00 126 (caddr_t)dbi->dbi_buf, dbi->dbi_len,
34dc7c2f 127 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
37abac6d
BP
128
129 mutex_enter(&ds->ds_sendstream_lock);
044baf00 130 *dsp->dsa_off += dbi->dbi_len;
37abac6d 131 mutex_exit(&ds->ds_sendstream_lock);
044baf00
BB
132}
133
134static int
135dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
136{
137 dump_bytes_io_t dbi;
138
139 dbi.dbi_dsp = dsp;
140 dbi.dbi_buf = buf;
141 dbi.dbi_len = len;
142
b58986ee
BB
143#if defined(HAVE_LARGE_STACKS)
144 dump_bytes_cb(&dbi);
145#else
044baf00
BB
146 /*
147 * The vn_rdwr() call is performed in a taskq to ensure that there is
148 * always enough stack space to write safely to the target filesystem.
149 * The ZIO_TYPE_FREE threads are used because there can be a lot of
150 * them and they are used in vdev_file.c for a similar purpose.
151 */
152 spa_taskq_dispatch_sync(dmu_objset_spa(dsp->dsa_os), ZIO_TYPE_FREE,
b58986ee
BB
153 ZIO_TASKQ_ISSUE, dump_bytes_cb, &dbi, TQ_SLEEP);
154#endif /* HAVE_LARGE_STACKS */
37abac6d
BP
155
156 return (dsp->dsa_err);
34dc7c2f
BB
157}
158
37f8a883
MA
159/*
160 * For all record types except BEGIN, fill in the checksum (overlaid in
161 * drr_u.drr_checksum.drr_checksum). The checksum verifies everything
162 * up to the start of the checksum itself.
163 */
164static int
165dump_record(dmu_sendarg_t *dsp, void *payload, int payload_len)
166{
167 ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
168 ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t));
169 fletcher_4_incremental_native(dsp->dsa_drr,
170 offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
171 &dsp->dsa_zc);
172 if (dsp->dsa_drr->drr_type != DRR_BEGIN) {
173 ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u.
174 drr_checksum.drr_checksum));
175 dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc;
176 }
177 fletcher_4_incremental_native(&dsp->dsa_drr->
178 drr_u.drr_checksum.drr_checksum,
179 sizeof (zio_cksum_t), &dsp->dsa_zc);
180 if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0)
181 return (SET_ERROR(EINTR));
182 if (payload_len != 0) {
183 fletcher_4_incremental_native(payload, payload_len,
184 &dsp->dsa_zc);
185 if (dump_bytes(dsp, payload, payload_len) != 0)
186 return (SET_ERROR(EINTR));
187 }
188 return (0);
189}
190
e6d3a843
PD
191/*
192 * Fill in the drr_free struct, or perform aggregation if the previous record is
193 * also a free record, and the two are adjacent.
194 *
195 * Note that we send free records even for a full send, because we want to be
196 * able to receive a full send as a clone, which requires a list of all the free
197 * and freeobject records that were generated on the source.
198 */
34dc7c2f 199static int
37abac6d 200dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
34dc7c2f
BB
201 uint64_t length)
202{
37abac6d 203 struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free);
428870ff 204
ea97f8ce
MA
205 /*
206 * When we receive a free record, dbuf_free_range() assumes
207 * that the receiving system doesn't have any dbufs in the range
208 * being freed. This is always true because there is a one-record
209 * constraint: we only send one WRITE record for any given
47dfff3b 210 * object,offset. We know that the one-record constraint is
ea97f8ce
MA
211 * true because we always send data in increasing order by
212 * object,offset.
213 *
214 * If the increasing-order constraint ever changes, we should find
215 * another way to assert that the one-record constraint is still
216 * satisfied.
217 */
218 ASSERT(object > dsp->dsa_last_data_object ||
219 (object == dsp->dsa_last_data_object &&
220 offset > dsp->dsa_last_data_offset));
221
c578f007
SK
222 if (length != -1ULL && offset + length < offset)
223 length = -1ULL;
224
428870ff
BB
225 /*
226 * If there is a pending op, but it's not PENDING_FREE, push it out,
227 * since free block aggregation can only be done for blocks of the
228 * same type (i.e., DRR_FREE records can only be aggregated with
229 * other DRR_FREE records. DRR_FREEOBJECTS records can only be
230 * aggregated with other DRR_FREEOBJECTS records.
231 */
37abac6d
BP
232 if (dsp->dsa_pending_op != PENDING_NONE &&
233 dsp->dsa_pending_op != PENDING_FREE) {
37f8a883 234 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 235 return (SET_ERROR(EINTR));
37abac6d 236 dsp->dsa_pending_op = PENDING_NONE;
428870ff
BB
237 }
238
37abac6d 239 if (dsp->dsa_pending_op == PENDING_FREE) {
428870ff
BB
240 /*
241 * There should never be a PENDING_FREE if length is -1
242 * (because dump_dnode is the only place where this
243 * function is called with a -1, and only after flushing
244 * any pending record).
245 */
246 ASSERT(length != -1ULL);
247 /*
248 * Check to see whether this free block can be aggregated
249 * with pending one.
250 */
251 if (drrf->drr_object == object && drrf->drr_offset +
252 drrf->drr_length == offset) {
253 drrf->drr_length += length;
254 return (0);
255 } else {
256 /* not a continuation. Push out pending record */
37f8a883 257 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 258 return (SET_ERROR(EINTR));
37abac6d 259 dsp->dsa_pending_op = PENDING_NONE;
428870ff
BB
260 }
261 }
262 /* create a FREE record and make it pending */
37abac6d
BP
263 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
264 dsp->dsa_drr->drr_type = DRR_FREE;
428870ff
BB
265 drrf->drr_object = object;
266 drrf->drr_offset = offset;
267 drrf->drr_length = length;
37abac6d 268 drrf->drr_toguid = dsp->dsa_toguid;
428870ff 269 if (length == -1ULL) {
37f8a883 270 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 271 return (SET_ERROR(EINTR));
428870ff 272 } else {
37abac6d 273 dsp->dsa_pending_op = PENDING_FREE;
428870ff 274 }
34dc7c2f 275
34dc7c2f
BB
276 return (0);
277}
278
279static int
9b67f605 280dump_write(dmu_sendarg_t *dsp, dmu_object_type_t type,
428870ff 281 uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
34dc7c2f 282{
37abac6d 283 struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write);
428870ff 284
ea97f8ce
MA
285 /*
286 * We send data in increasing object, offset order.
287 * See comment in dump_free() for details.
288 */
289 ASSERT(object > dsp->dsa_last_data_object ||
290 (object == dsp->dsa_last_data_object &&
291 offset > dsp->dsa_last_data_offset));
292 dsp->dsa_last_data_object = object;
293 dsp->dsa_last_data_offset = offset + blksz - 1;
428870ff
BB
294
295 /*
296 * If there is any kind of pending aggregation (currently either
297 * a grouping of free objects or free blocks), push it out to
298 * the stream, since aggregation can't be done across operations
299 * of different types.
300 */
37abac6d 301 if (dsp->dsa_pending_op != PENDING_NONE) {
37f8a883 302 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 303 return (SET_ERROR(EINTR));
37abac6d 304 dsp->dsa_pending_op = PENDING_NONE;
428870ff 305 }
37f8a883 306 /* write a WRITE record */
37abac6d
BP
307 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
308 dsp->dsa_drr->drr_type = DRR_WRITE;
428870ff
BB
309 drrw->drr_object = object;
310 drrw->drr_type = type;
311 drrw->drr_offset = offset;
312 drrw->drr_length = blksz;
37abac6d 313 drrw->drr_toguid = dsp->dsa_toguid;
f1512ee6 314 if (bp == NULL || BP_IS_EMBEDDED(bp)) {
9b67f605 315 /*
f1512ee6
MA
316 * There's no pre-computed checksum for partial-block
317 * writes or embedded BP's, so (like
318 * fletcher4-checkummed blocks) userland will have to
319 * compute a dedup-capable checksum itself.
9b67f605
MA
320 */
321 drrw->drr_checksumtype = ZIO_CHECKSUM_OFF;
322 } else {
323 drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
324 if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
325 drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
326 DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
327 DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
328 DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
329 drrw->drr_key.ddk_cksum = bp->blk_cksum;
330 }
428870ff 331
37f8a883 332 if (dump_record(dsp, data, blksz) != 0)
2e528b49 333 return (SET_ERROR(EINTR));
428870ff
BB
334 return (0);
335}
336
9b67f605
MA
337static int
338dump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset,
339 int blksz, const blkptr_t *bp)
340{
341 char buf[BPE_PAYLOAD_SIZE];
342 struct drr_write_embedded *drrw =
343 &(dsp->dsa_drr->drr_u.drr_write_embedded);
344
345 if (dsp->dsa_pending_op != PENDING_NONE) {
37f8a883 346 if (dump_record(dsp, NULL, 0) != 0)
9b67f605
MA
347 return (EINTR);
348 dsp->dsa_pending_op = PENDING_NONE;
349 }
350
351 ASSERT(BP_IS_EMBEDDED(bp));
352
353 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
354 dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED;
355 drrw->drr_object = object;
356 drrw->drr_offset = offset;
357 drrw->drr_length = blksz;
358 drrw->drr_toguid = dsp->dsa_toguid;
359 drrw->drr_compression = BP_GET_COMPRESS(bp);
360 drrw->drr_etype = BPE_GET_ETYPE(bp);
361 drrw->drr_lsize = BPE_GET_LSIZE(bp);
362 drrw->drr_psize = BPE_GET_PSIZE(bp);
363
364 decode_embedded_bp_compressed(bp, buf);
365
37f8a883 366 if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0)
9b67f605
MA
367 return (EINTR);
368 return (0);
369}
370
428870ff 371static int
37abac6d 372dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data)
428870ff 373{
37abac6d 374 struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill);
428870ff 375
37abac6d 376 if (dsp->dsa_pending_op != PENDING_NONE) {
37f8a883 377 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 378 return (SET_ERROR(EINTR));
37abac6d 379 dsp->dsa_pending_op = PENDING_NONE;
428870ff
BB
380 }
381
382 /* write a SPILL record */
37abac6d
BP
383 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
384 dsp->dsa_drr->drr_type = DRR_SPILL;
428870ff
BB
385 drrs->drr_object = object;
386 drrs->drr_length = blksz;
37abac6d 387 drrs->drr_toguid = dsp->dsa_toguid;
34dc7c2f 388
37f8a883 389 if (dump_record(dsp, data, blksz) != 0)
2e528b49 390 return (SET_ERROR(EINTR));
34dc7c2f
BB
391 return (0);
392}
393
394static int
37abac6d 395dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs)
34dc7c2f 396{
37abac6d 397 struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects);
428870ff
BB
398
399 /*
400 * If there is a pending op, but it's not PENDING_FREEOBJECTS,
401 * push it out, since free block aggregation can only be done for
402 * blocks of the same type (i.e., DRR_FREE records can only be
403 * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
404 * can only be aggregated with other DRR_FREEOBJECTS records.
405 */
37abac6d
BP
406 if (dsp->dsa_pending_op != PENDING_NONE &&
407 dsp->dsa_pending_op != PENDING_FREEOBJECTS) {
37f8a883 408 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 409 return (SET_ERROR(EINTR));
37abac6d 410 dsp->dsa_pending_op = PENDING_NONE;
428870ff 411 }
37abac6d 412 if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) {
428870ff
BB
413 /*
414 * See whether this free object array can be aggregated
415 * with pending one
416 */
417 if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
418 drrfo->drr_numobjs += numobjs;
419 return (0);
420 } else {
421 /* can't be aggregated. Push out pending record */
37f8a883 422 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 423 return (SET_ERROR(EINTR));
37abac6d 424 dsp->dsa_pending_op = PENDING_NONE;
428870ff
BB
425 }
426 }
427
34dc7c2f 428 /* write a FREEOBJECTS record */
37abac6d
BP
429 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
430 dsp->dsa_drr->drr_type = DRR_FREEOBJECTS;
428870ff
BB
431 drrfo->drr_firstobj = firstobj;
432 drrfo->drr_numobjs = numobjs;
37abac6d 433 drrfo->drr_toguid = dsp->dsa_toguid;
428870ff 434
37abac6d 435 dsp->dsa_pending_op = PENDING_FREEOBJECTS;
34dc7c2f 436
34dc7c2f
BB
437 return (0);
438}
439
440static int
37abac6d 441dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp)
34dc7c2f 442{
37abac6d 443 struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object);
428870ff 444
47dfff3b
MA
445 if (object < dsp->dsa_resume_object) {
446 /*
447 * Note: when resuming, we will visit all the dnodes in
448 * the block of dnodes that we are resuming from. In
449 * this case it's unnecessary to send the dnodes prior to
450 * the one we are resuming from. We should be at most one
451 * block's worth of dnodes behind the resume point.
452 */
453 ASSERT3U(dsp->dsa_resume_object - object, <,
454 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT));
455 return (0);
456 }
457
34dc7c2f 458 if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
37abac6d 459 return (dump_freeobjects(dsp, object, 1));
34dc7c2f 460
37abac6d 461 if (dsp->dsa_pending_op != PENDING_NONE) {
37f8a883 462 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 463 return (SET_ERROR(EINTR));
37abac6d 464 dsp->dsa_pending_op = PENDING_NONE;
428870ff
BB
465 }
466
34dc7c2f 467 /* write an OBJECT record */
37abac6d
BP
468 bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t));
469 dsp->dsa_drr->drr_type = DRR_OBJECT;
428870ff
BB
470 drro->drr_object = object;
471 drro->drr_type = dnp->dn_type;
472 drro->drr_bonustype = dnp->dn_bonustype;
473 drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
474 drro->drr_bonuslen = dnp->dn_bonuslen;
50c957f7 475 drro->drr_dn_slots = dnp->dn_extra_slots + 1;
428870ff
BB
476 drro->drr_checksumtype = dnp->dn_checksum;
477 drro->drr_compress = dnp->dn_compress;
37abac6d 478 drro->drr_toguid = dsp->dsa_toguid;
428870ff 479
f1512ee6
MA
480 if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
481 drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE)
482 drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE;
483
37f8a883
MA
484 if (dump_record(dsp, DN_BONUS(dnp),
485 P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) {
2e528b49 486 return (SET_ERROR(EINTR));
37f8a883 487 }
34dc7c2f 488
ea97f8ce 489 /* Free anything past the end of the file. */
37abac6d 490 if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) *
ea97f8ce 491 (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0)
2e528b49 492 return (SET_ERROR(EINTR));
13fe0198 493 if (dsp->dsa_err != 0)
2e528b49 494 return (SET_ERROR(EINTR));
34dc7c2f
BB
495 return (0);
496}
497
9b67f605
MA
498static boolean_t
499backup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp)
500{
501 if (!BP_IS_EMBEDDED(bp))
502 return (B_FALSE);
503
504 /*
505 * Compression function must be legacy, or explicitly enabled.
506 */
507 if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS &&
508 !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4)))
509 return (B_FALSE);
510
511 /*
512 * Embed type must be explicitly enabled.
513 */
514 switch (BPE_GET_ETYPE(bp)) {
515 case BP_EMBEDDED_TYPE_DATA:
516 if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)
517 return (B_TRUE);
518 break;
519 default:
520 return (B_FALSE);
521 }
522 return (B_FALSE);
523}
524
fcff0f35
PD
525/*
526 * This is the callback function to traverse_dataset that acts as the worker
527 * thread for dmu_send_impl.
528 */
529/*ARGSUSED*/
530static int
531send_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
532 const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg)
533{
534 struct send_thread_arg *sta = arg;
535 struct send_block_record *record;
536 uint64_t record_size;
537 int err = 0;
538
47dfff3b
MA
539 ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT ||
540 zb->zb_object >= sta->resume.zb_object);
541
fcff0f35
PD
542 if (sta->cancel)
543 return (SET_ERROR(EINTR));
34dc7c2f 544
fcff0f35
PD
545 if (bp == NULL) {
546 ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL);
547 return (0);
548 } else if (zb->zb_level < 0) {
549 return (0);
550 }
551
552 record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP);
553 record->eos_marker = B_FALSE;
554 record->bp = *bp;
555 record->zb = *zb;
556 record->indblkshift = dnp->dn_indblkshift;
557 record->datablkszsec = dnp->dn_datablkszsec;
558 record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
559 bqueue_enqueue(&sta->q, record, record_size);
560
561 return (err);
562}
563
564/*
565 * This function kicks off the traverse_dataset. It also handles setting the
566 * error code of the thread in case something goes wrong, and pushes the End of
567 * Stream record when the traverse_dataset call has finished. If there is no
568 * dataset to traverse, the thread immediately pushes End of Stream marker.
569 */
570static void
571send_traverse_thread(void *arg)
572{
573 struct send_thread_arg *st_arg = arg;
574 int err;
575 struct send_block_record *data;
3e635ac1 576 fstrans_cookie_t cookie = spl_fstrans_mark();
fcff0f35
PD
577
578 if (st_arg->ds != NULL) {
47dfff3b
MA
579 err = traverse_dataset_resume(st_arg->ds,
580 st_arg->fromtxg, &st_arg->resume,
581 st_arg->flags, send_cb, st_arg);
582
fcff0f35
PD
583 if (err != EINTR)
584 st_arg->error_code = err;
585 }
586 data = kmem_zalloc(sizeof (*data), KM_SLEEP);
587 data->eos_marker = B_TRUE;
588 bqueue_enqueue(&st_arg->q, data, 1);
3e635ac1 589 spl_fstrans_unmark(cookie);
fcff0f35
PD
590}
591
592/*
593 * This function actually handles figuring out what kind of record needs to be
594 * dumped, reading the data (which has hopefully been prefetched), and calling
595 * the appropriate helper function.
596 */
34dc7c2f 597static int
fcff0f35 598do_dump(dmu_sendarg_t *dsa, struct send_block_record *data)
34dc7c2f 599{
fcff0f35
PD
600 dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os);
601 const blkptr_t *bp = &data->bp;
602 const zbookmark_phys_t *zb = &data->zb;
603 uint8_t indblkshift = data->indblkshift;
604 uint16_t dblkszsec = data->datablkszsec;
605 spa_t *spa = ds->ds_dir->dd_pool->dp_spa;
34dc7c2f 606 dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
34dc7c2f 607 int err = 0;
fcff0f35 608 uint64_t dnobj;
34dc7c2f 609
fcff0f35 610 ASSERT3U(zb->zb_level, >=, 0);
34dc7c2f 611
47dfff3b
MA
612 ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT ||
613 zb->zb_object >= dsa->dsa_resume_object);
614
428870ff
BB
615 if (zb->zb_object != DMU_META_DNODE_OBJECT &&
616 DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
9babb374 617 return (0);
b0bc7a84
MG
618 } else if (BP_IS_HOLE(bp) &&
619 zb->zb_object == DMU_META_DNODE_OBJECT) {
fcff0f35 620 uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level);
b128c09f 621 uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
fcff0f35 622 err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT);
b0bc7a84 623 } else if (BP_IS_HOLE(bp)) {
fcff0f35
PD
624 uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level);
625 uint64_t offset = zb->zb_blkid * span;
626 err = dump_free(dsa, zb->zb_object, offset, span);
b128c09f
BB
627 } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
628 return (0);
629 } else if (type == DMU_OT_DNODE) {
50c957f7
NB
630 dnode_phys_t *blk;
631 int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
2a432414 632 arc_flags_t aflags = ARC_FLAG_WAIT;
b128c09f 633 arc_buf_t *abuf;
fcff0f35
PD
634 int i;
635
636 ASSERT0(zb->zb_level);
b128c09f 637
294f6806
GW
638 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
639 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
640 &aflags, zb) != 0)
2e528b49 641 return (SET_ERROR(EIO));
34dc7c2f 642
b128c09f 643 blk = abuf->b_data;
50c957f7
NB
644 dnobj = zb->zb_blkid * epb;
645 for (i = 0; i < epb; i += blk[i].dn_extra_slots + 1) {
fcff0f35 646 err = dump_dnode(dsa, dnobj + i, blk + i);
13fe0198 647 if (err != 0)
34dc7c2f
BB
648 break;
649 }
b128c09f 650 (void) arc_buf_remove_ref(abuf, &abuf);
428870ff 651 } else if (type == DMU_OT_SA) {
2a432414 652 arc_flags_t aflags = ARC_FLAG_WAIT;
b128c09f 653 arc_buf_t *abuf;
34dc7c2f 654 int blksz = BP_GET_LSIZE(bp);
b128c09f 655
294f6806
GW
656 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
657 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
658 &aflags, zb) != 0)
2e528b49 659 return (SET_ERROR(EIO));
b128c09f 660
fcff0f35 661 err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data);
428870ff 662 (void) arc_buf_remove_ref(abuf, &abuf);
fcff0f35 663 } else if (backup_do_embed(dsa, bp)) {
9b67f605 664 /* it's an embedded level-0 block of a regular object */
fcff0f35
PD
665 int blksz = dblkszsec << SPA_MINBLOCKSHIFT;
666 ASSERT0(zb->zb_level);
667 err = dump_write_embedded(dsa, zb->zb_object,
9b67f605 668 zb->zb_blkid * blksz, blksz, bp);
fcff0f35
PD
669 } else {
670 /* it's a level-0 block of a regular object */
2a432414 671 arc_flags_t aflags = ARC_FLAG_WAIT;
428870ff 672 arc_buf_t *abuf;
fcff0f35
PD
673 int blksz = dblkszsec << SPA_MINBLOCKSHIFT;
674 uint64_t offset;
428870ff 675
da536844 676 ASSERT0(zb->zb_level);
47dfff3b
MA
677 ASSERT(zb->zb_object > dsa->dsa_resume_object ||
678 (zb->zb_object == dsa->dsa_resume_object &&
679 zb->zb_blkid * blksz >= dsa->dsa_resume_offset));
680
294f6806
GW
681 if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
682 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
683 &aflags, zb) != 0) {
330d06f9
MA
684 if (zfs_send_corrupt_data) {
685 uint64_t *ptr;
686 /* Send a block filled with 0x"zfs badd bloc" */
687 abuf = arc_buf_alloc(spa, blksz, &abuf,
688 ARC_BUFC_DATA);
689 for (ptr = abuf->b_data;
690 (char *)ptr < (char *)abuf->b_data + blksz;
691 ptr++)
dd26aa53 692 *ptr = 0x2f5baddb10cULL;
330d06f9 693 } else {
2e528b49 694 return (SET_ERROR(EIO));
330d06f9
MA
695 }
696 }
428870ff 697
f1512ee6
MA
698 offset = zb->zb_blkid * blksz;
699
fcff0f35 700 if (!(dsa->dsa_featureflags &
f1512ee6
MA
701 DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
702 blksz > SPA_OLD_MAXBLOCKSIZE) {
703 char *buf = abuf->b_data;
704 while (blksz > 0 && err == 0) {
705 int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE);
fcff0f35 706 err = dump_write(dsa, type, zb->zb_object,
f1512ee6
MA
707 offset, n, NULL, buf);
708 offset += n;
709 buf += n;
710 blksz -= n;
711 }
712 } else {
fcff0f35 713 err = dump_write(dsa, type, zb->zb_object,
f1512ee6
MA
714 offset, blksz, bp, abuf->b_data);
715 }
b128c09f 716 (void) arc_buf_remove_ref(abuf, &abuf);
34dc7c2f
BB
717 }
718
719 ASSERT(err == 0 || err == EINTR);
720 return (err);
721}
722
6f1ffb06 723/*
fcff0f35
PD
724 * Pop the new data off the queue, and free the old data.
725 */
726static struct send_block_record *
727get_next_record(bqueue_t *bq, struct send_block_record *data)
728{
729 struct send_block_record *tmp = bqueue_dequeue(bq);
730 kmem_free(data, sizeof (*data));
731 return (tmp);
732}
733
734/*
735 * Actually do the bulk of the work in a zfs send.
736 *
737 * Note: Releases dp using the specified tag.
6f1ffb06 738 */
13fe0198 739static int
fcff0f35 740dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds,
47dfff3b
MA
741 zfs_bookmark_phys_t *ancestor_zb,
742 boolean_t is_clone, boolean_t embedok, boolean_t large_block_ok, int outfd,
743 uint64_t resumeobj, uint64_t resumeoff,
744 vnode_t *vp, offset_t *off)
34dc7c2f 745{
13fe0198 746 objset_t *os;
34dc7c2f 747 dmu_replay_record_t *drr;
37abac6d 748 dmu_sendarg_t *dsp;
34dc7c2f
BB
749 int err;
750 uint64_t fromtxg = 0;
9b67f605 751 uint64_t featureflags = 0;
fcff0f35 752 struct send_thread_arg to_arg;
47dfff3b
MA
753 void *payload = NULL;
754 size_t payload_len = 0;
fcff0f35 755 struct send_block_record *to_data;
34dc7c2f 756
fcff0f35 757 err = dmu_objset_from_ds(to_ds, &os);
13fe0198 758 if (err != 0) {
13fe0198
MA
759 dsl_pool_rele(dp, tag);
760 return (err);
761 }
34dc7c2f 762
34dc7c2f
BB
763 drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
764 drr->drr_type = DRR_BEGIN;
765 drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
428870ff
BB
766 DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
767 DMU_SUBSTREAM);
768
47dfff3b
MA
769 bzero(&to_arg, sizeof (to_arg));
770
428870ff 771#ifdef _KERNEL
13fe0198 772 if (dmu_objset_type(os) == DMU_OST_ZFS) {
428870ff 773 uint64_t version;
13fe0198 774 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) {
37abac6d 775 kmem_free(drr, sizeof (dmu_replay_record_t));
13fe0198 776 dsl_pool_rele(dp, tag);
2e528b49 777 return (SET_ERROR(EINVAL));
37abac6d 778 }
13fe0198 779 if (version >= ZPL_VERSION_SA) {
9b67f605 780 featureflags |= DMU_BACKUP_FEATURE_SA_SPILL;
428870ff
BB
781 }
782 }
783#endif
784
fcff0f35 785 if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS])
f1512ee6 786 featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS;
50c957f7
NB
787 if (to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_DNODE])
788 featureflags |= DMU_BACKUP_FEATURE_LARGE_DNODE;
9b67f605
MA
789 if (embedok &&
790 spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) {
791 featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA;
792 if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS))
793 featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4;
9b67f605
MA
794 }
795
47dfff3b
MA
796 if (resumeobj != 0 || resumeoff != 0) {
797 featureflags |= DMU_BACKUP_FEATURE_RESUMING;
798 }
799
9b67f605
MA
800 DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo,
801 featureflags);
802
34dc7c2f 803 drr->drr_u.drr_begin.drr_creation_time =
fcff0f35 804 dsl_dataset_phys(to_ds)->ds_creation_time;
13fe0198 805 drr->drr_u.drr_begin.drr_type = dmu_objset_type(os);
da536844 806 if (is_clone)
34dc7c2f 807 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
fcff0f35
PD
808 drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid;
809 if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET)
34dc7c2f 810 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
b607405f
AS
811 if (zfs_send_set_freerecords_bit)
812 drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_FREERECORDS;
34dc7c2f 813
fcff0f35
PD
814 if (ancestor_zb != NULL) {
815 drr->drr_u.drr_begin.drr_fromguid =
816 ancestor_zb->zbm_guid;
817 fromtxg = ancestor_zb->zbm_creation_txg;
da536844 818 }
fcff0f35
PD
819 dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname);
820 if (!to_ds->ds_is_snapshot) {
da536844
MA
821 (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--",
822 sizeof (drr->drr_u.drr_begin.drr_toname));
13fe0198 823 }
34dc7c2f 824
37abac6d
BP
825 dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP);
826
827 dsp->dsa_drr = drr;
828 dsp->dsa_vp = vp;
829 dsp->dsa_outfd = outfd;
830 dsp->dsa_proc = curproc;
13fe0198 831 dsp->dsa_os = os;
37abac6d 832 dsp->dsa_off = off;
fcff0f35 833 dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid;
37abac6d 834 dsp->dsa_pending_op = PENDING_NONE;
9b67f605 835 dsp->dsa_featureflags = featureflags;
47dfff3b
MA
836 dsp->dsa_resume_object = resumeobj;
837 dsp->dsa_resume_offset = resumeoff;
37abac6d 838
fcff0f35
PD
839 mutex_enter(&to_ds->ds_sendstream_lock);
840 list_insert_head(&to_ds->ds_sendstreams, dsp);
841 mutex_exit(&to_ds->ds_sendstream_lock);
37abac6d 842
fcff0f35 843 dsl_dataset_long_hold(to_ds, FTAG);
7ec09286
MA
844 dsl_pool_rele(dp, tag);
845
47dfff3b
MA
846 if (resumeobj != 0 || resumeoff != 0) {
847 dmu_object_info_t to_doi;
848 nvlist_t *nvl;
849 err = dmu_object_info(os, resumeobj, &to_doi);
850 if (err != 0)
851 goto out;
852 SET_BOOKMARK(&to_arg.resume, to_ds->ds_object, resumeobj, 0,
853 resumeoff / to_doi.doi_data_block_size);
854
855 nvl = fnvlist_alloc();
856 fnvlist_add_uint64(nvl, "resume_object", resumeobj);
857 fnvlist_add_uint64(nvl, "resume_offset", resumeoff);
858 payload = fnvlist_pack(nvl, &payload_len);
859 drr->drr_payloadlen = payload_len;
860 fnvlist_free(nvl);
861 }
862
863 err = dump_record(dsp, payload, payload_len);
864 fnvlist_pack_free(payload, payload_len);
865 if (err != 0) {
37abac6d
BP
866 err = dsp->dsa_err;
867 goto out;
34dc7c2f
BB
868 }
869
fcff0f35
PD
870 err = bqueue_init(&to_arg.q, zfs_send_queue_length,
871 offsetof(struct send_block_record, ln));
872 to_arg.error_code = 0;
873 to_arg.cancel = B_FALSE;
874 to_arg.ds = to_ds;
875 to_arg.fromtxg = fromtxg;
876 to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH;
877 (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, curproc,
878 TS_RUN, minclsyspri);
879
880 to_data = bqueue_dequeue(&to_arg.q);
881
882 while (!to_data->eos_marker && err == 0) {
883 err = do_dump(dsp, to_data);
884 to_data = get_next_record(&to_arg.q, to_data);
885 if (issig(JUSTLOOKING) && issig(FORREAL))
886 err = EINTR;
887 }
888
889 if (err != 0) {
890 to_arg.cancel = B_TRUE;
891 while (!to_data->eos_marker) {
892 to_data = get_next_record(&to_arg.q, to_data);
893 }
894 }
895 kmem_free(to_data, sizeof (*to_data));
896
897 bqueue_destroy(&to_arg.q);
898
899 if (err == 0 && to_arg.error_code != 0)
900 err = to_arg.error_code;
901
902 if (err != 0)
903 goto out;
34dc7c2f 904
37abac6d 905 if (dsp->dsa_pending_op != PENDING_NONE)
37f8a883 906 if (dump_record(dsp, NULL, 0) != 0)
2e528b49 907 err = SET_ERROR(EINTR);
428870ff 908
13fe0198
MA
909 if (err != 0) {
910 if (err == EINTR && dsp->dsa_err != 0)
37abac6d
BP
911 err = dsp->dsa_err;
912 goto out;
34dc7c2f
BB
913 }
914
915 bzero(drr, sizeof (dmu_replay_record_t));
916 drr->drr_type = DRR_END;
37abac6d
BP
917 drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc;
918 drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid;
34dc7c2f 919
fcff0f35 920 if (dump_record(dsp, NULL, 0) != 0)
37abac6d 921 err = dsp->dsa_err;
34dc7c2f 922
37abac6d 923out:
fcff0f35
PD
924 mutex_enter(&to_ds->ds_sendstream_lock);
925 list_remove(&to_ds->ds_sendstreams, dsp);
926 mutex_exit(&to_ds->ds_sendstream_lock);
37abac6d 927
34dc7c2f 928 kmem_free(drr, sizeof (dmu_replay_record_t));
37abac6d 929 kmem_free(dsp, sizeof (dmu_sendarg_t));
34dc7c2f 930
fcff0f35 931 dsl_dataset_long_rele(to_ds, FTAG);
13fe0198 932
37abac6d 933 return (err);
34dc7c2f
BB
934}
935
330d06f9 936int
13fe0198 937dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap,
f1512ee6
MA
938 boolean_t embedok, boolean_t large_block_ok,
939 int outfd, vnode_t *vp, offset_t *off)
13fe0198
MA
940{
941 dsl_pool_t *dp;
942 dsl_dataset_t *ds;
943 dsl_dataset_t *fromds = NULL;
944 int err;
945
946 err = dsl_pool_hold(pool, FTAG, &dp);
947 if (err != 0)
948 return (err);
949
950 err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds);
951 if (err != 0) {
952 dsl_pool_rele(dp, FTAG);
953 return (err);
954 }
955
956 if (fromsnap != 0) {
da536844
MA
957 zfs_bookmark_phys_t zb;
958 boolean_t is_clone;
959
13fe0198
MA
960 err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds);
961 if (err != 0) {
962 dsl_dataset_rele(ds, FTAG);
963 dsl_pool_rele(dp, FTAG);
964 return (err);
965 }
da536844
MA
966 if (!dsl_dataset_is_before(ds, fromds, 0))
967 err = SET_ERROR(EXDEV);
d683ddbb
JG
968 zb.zbm_creation_time =
969 dsl_dataset_phys(fromds)->ds_creation_time;
970 zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg;
971 zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid;
da536844
MA
972 is_clone = (fromds->ds_dir != ds->ds_dir);
973 dsl_dataset_rele(fromds, FTAG);
f1512ee6 974 err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone,
47dfff3b 975 embedok, large_block_ok, outfd, 0, 0, vp, off);
da536844 976 } else {
f1512ee6 977 err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE,
47dfff3b 978 embedok, large_block_ok, outfd, 0, 0, vp, off);
13fe0198 979 }
da536844
MA
980 dsl_dataset_rele(ds, FTAG);
981 return (err);
13fe0198
MA
982}
983
984int
47dfff3b
MA
985dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok,
986 boolean_t large_block_ok, int outfd, uint64_t resumeobj, uint64_t resumeoff,
987 vnode_t *vp, offset_t *off)
13fe0198
MA
988{
989 dsl_pool_t *dp;
990 dsl_dataset_t *ds;
13fe0198 991 int err;
da536844 992 boolean_t owned = B_FALSE;
13fe0198 993
da536844 994 if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL)
2e528b49 995 return (SET_ERROR(EINVAL));
13fe0198
MA
996
997 err = dsl_pool_hold(tosnap, FTAG, &dp);
998 if (err != 0)
999 return (err);
1000
da536844
MA
1001 if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) {
1002 /*
1003 * We are sending a filesystem or volume. Ensure
1004 * that it doesn't change by owning the dataset.
1005 */
1006 err = dsl_dataset_own(dp, tosnap, FTAG, &ds);
1007 owned = B_TRUE;
1008 } else {
1009 err = dsl_dataset_hold(dp, tosnap, FTAG, &ds);
1010 }
13fe0198
MA
1011 if (err != 0) {
1012 dsl_pool_rele(dp, FTAG);
1013 return (err);
1014 }
1015
1016 if (fromsnap != NULL) {
da536844
MA
1017 zfs_bookmark_phys_t zb;
1018 boolean_t is_clone = B_FALSE;
1019 int fsnamelen = strchr(tosnap, '@') - tosnap;
1020
1021 /*
1022 * If the fromsnap is in a different filesystem, then
1023 * mark the send stream as a clone.
1024 */
1025 if (strncmp(tosnap, fromsnap, fsnamelen) != 0 ||
1026 (fromsnap[fsnamelen] != '@' &&
1027 fromsnap[fsnamelen] != '#')) {
1028 is_clone = B_TRUE;
1029 }
1030
1031 if (strchr(fromsnap, '@')) {
1032 dsl_dataset_t *fromds;
1033 err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds);
1034 if (err == 0) {
1035 if (!dsl_dataset_is_before(ds, fromds, 0))
1036 err = SET_ERROR(EXDEV);
1037 zb.zbm_creation_time =
d683ddbb 1038 dsl_dataset_phys(fromds)->ds_creation_time;
da536844 1039 zb.zbm_creation_txg =
d683ddbb
JG
1040 dsl_dataset_phys(fromds)->ds_creation_txg;
1041 zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid;
da536844
MA
1042 is_clone = (ds->ds_dir != fromds->ds_dir);
1043 dsl_dataset_rele(fromds, FTAG);
1044 }
1045 } else {
1046 err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb);
1047 }
13fe0198
MA
1048 if (err != 0) {
1049 dsl_dataset_rele(ds, FTAG);
1050 dsl_pool_rele(dp, FTAG);
1051 return (err);
1052 }
f1512ee6 1053 err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone,
47dfff3b
MA
1054 embedok, large_block_ok,
1055 outfd, resumeobj, resumeoff, vp, off);
da536844 1056 } else {
f1512ee6 1057 err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE,
47dfff3b
MA
1058 embedok, large_block_ok,
1059 outfd, resumeobj, resumeoff, vp, off);
13fe0198 1060 }
da536844
MA
1061 if (owned)
1062 dsl_dataset_disown(ds, FTAG);
1063 else
1064 dsl_dataset_rele(ds, FTAG);
1065 return (err);
13fe0198
MA
1066}
1067
5dc8b736
MG
1068static int
1069dmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t size,
1070 uint64_t *sizep)
1071{
1072 int err;
1073 /*
1074 * Assume that space (both on-disk and in-stream) is dominated by
1075 * data. We will adjust for indirect blocks and the copies property,
1076 * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
1077 */
1078
1079 /*
1080 * Subtract out approximate space used by indirect blocks.
1081 * Assume most space is used by data blocks (non-indirect, non-dnode).
1082 * Assume all blocks are recordsize. Assume ditto blocks and
1083 * internal fragmentation counter out compression.
1084 *
1085 * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
1086 * block, which we observe in practice.
1087 */
1088 uint64_t recordsize;
1089 err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize);
1090 if (err != 0)
1091 return (err);
1092 size -= size / recordsize * sizeof (blkptr_t);
1093
1094 /* Add in the space for the record associated with each block. */
1095 size += size / recordsize * sizeof (dmu_replay_record_t);
1096
1097 *sizep = size;
1098
1099 return (0);
1100}
1101
13fe0198
MA
1102int
1103dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep)
330d06f9 1104{
330d06f9 1105 int err;
5dc8b736 1106 uint64_t size;
13fe0198 1107
fd0fd646 1108 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
330d06f9
MA
1109
1110 /* tosnap must be a snapshot */
0c66c32d 1111 if (!ds->ds_is_snapshot)
2e528b49 1112 return (SET_ERROR(EINVAL));
330d06f9 1113
71e2fe41
AG
1114 /* fromsnap, if provided, must be a snapshot */
1115 if (fromds != NULL && !fromds->ds_is_snapshot)
1116 return (SET_ERROR(EINVAL));
1117
6f1ffb06
MA
1118 /*
1119 * fromsnap must be an earlier snapshot from the same fs as tosnap,
1120 * or the origin's fs.
1121 */
da536844 1122 if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0))
2e528b49 1123 return (SET_ERROR(EXDEV));
330d06f9 1124
330d06f9
MA
1125 /* Get uncompressed size estimate of changed data. */
1126 if (fromds == NULL) {
d683ddbb 1127 size = dsl_dataset_phys(ds)->ds_uncompressed_bytes;
330d06f9
MA
1128 } else {
1129 uint64_t used, comp;
1130 err = dsl_dataset_space_written(fromds, ds,
1131 &used, &comp, &size);
13fe0198 1132 if (err != 0)
330d06f9
MA
1133 return (err);
1134 }
1135
5dc8b736
MG
1136 err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep);
1137 return (err);
1138}
330d06f9 1139
5dc8b736
MG
1140/*
1141 * Simple callback used to traverse the blocks of a snapshot and sum their
1142 * uncompressed size
1143 */
1144/* ARGSUSED */
1145static int
1146dmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
1147 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
1148{
1149 uint64_t *spaceptr = arg;
1150 if (bp != NULL && !BP_IS_HOLE(bp)) {
1151 *spaceptr += BP_GET_UCSIZE(bp);
1152 }
1153 return (0);
1154}
1155
1156/*
1157 * Given a desination snapshot and a TXG, calculate the approximate size of a
1158 * send stream sent from that TXG. from_txg may be zero, indicating that the
1159 * whole snapshot will be sent.
1160 */
1161int
1162dmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg,
1163 uint64_t *sizep)
1164{
5dc8b736
MG
1165 int err;
1166 uint64_t size = 0;
1167
fd0fd646 1168 ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool));
5dc8b736
MG
1169
1170 /* tosnap must be a snapshot */
1171 if (!dsl_dataset_is_snapshot(ds))
1172 return (SET_ERROR(EINVAL));
1173
1174 /* verify that from_txg is before the provided snapshot was taken */
1175 if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) {
1176 return (SET_ERROR(EXDEV));
1177 }
330d06f9 1178 /*
5dc8b736
MG
1179 * traverse the blocks of the snapshot with birth times after
1180 * from_txg, summing their uncompressed size
330d06f9 1181 */
5dc8b736
MG
1182 err = traverse_dataset(ds, from_txg, TRAVERSE_POST,
1183 dmu_calculate_send_traversal, &size);
1184 if (err)
330d06f9 1185 return (err);
330d06f9 1186
5dc8b736
MG
1187 err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep);
1188 return (err);
330d06f9
MA
1189}
1190
13fe0198
MA
1191typedef struct dmu_recv_begin_arg {
1192 const char *drba_origin;
1193 dmu_recv_cookie_t *drba_cookie;
1194 cred_t *drba_cred;
19580676 1195 uint64_t drba_snapobj;
13fe0198 1196} dmu_recv_begin_arg_t;
34dc7c2f 1197
34dc7c2f 1198static int
13fe0198
MA
1199recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds,
1200 uint64_t fromguid)
34dc7c2f 1201{
34dc7c2f 1202 uint64_t val;
13fe0198
MA
1203 int error;
1204 dsl_pool_t *dp = ds->ds_dir->dd_pool;
34dc7c2f 1205
13fe0198
MA
1206 /* temporary clone name must not exist */
1207 error = zap_lookup(dp->dp_meta_objset,
d683ddbb 1208 dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name,
13fe0198
MA
1209 8, 1, &val);
1210 if (error != ENOENT)
1211 return (error == 0 ? EBUSY : error);
1212
572e2857 1213 /* new snapshot name must not exist */
13fe0198 1214 error = zap_lookup(dp->dp_meta_objset,
d683ddbb
JG
1215 dsl_dataset_phys(ds)->ds_snapnames_zapobj,
1216 drba->drba_cookie->drc_tosnap, 8, 1, &val);
13fe0198
MA
1217 if (error != ENOENT)
1218 return (error == 0 ? EEXIST : error);
572e2857 1219
788eb90c
JJ
1220 /*
1221 * Check snapshot limit before receiving. We'll recheck again at the
1222 * end, but might as well abort before receiving if we're already over
1223 * the limit.
1224 *
1225 * Note that we do not check the file system limit with
1226 * dsl_dir_fscount_check because the temporary %clones don't count
1227 * against that limit.
1228 */
1229 error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT,
1230 NULL, drba->drba_cred);
1231 if (error != 0)
1232 return (error);
1233
13fe0198 1234 if (fromguid != 0) {
19580676 1235 dsl_dataset_t *snap;
d683ddbb 1236 uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj;
19580676
MA
1237
1238 /* Find snapshot in this dir that matches fromguid. */
1239 while (obj != 0) {
1240 error = dsl_dataset_hold_obj(dp, obj, FTAG,
1241 &snap);
1242 if (error != 0)
1243 return (SET_ERROR(ENODEV));
1244 if (snap->ds_dir != ds->ds_dir) {
1245 dsl_dataset_rele(snap, FTAG);
1246 return (SET_ERROR(ENODEV));
1247 }
d683ddbb 1248 if (dsl_dataset_phys(snap)->ds_guid == fromguid)
19580676 1249 break;
d683ddbb 1250 obj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
19580676
MA
1251 dsl_dataset_rele(snap, FTAG);
1252 }
1253 if (obj == 0)
2e528b49 1254 return (SET_ERROR(ENODEV));
34dc7c2f 1255
19580676
MA
1256 if (drba->drba_cookie->drc_force) {
1257 drba->drba_snapobj = obj;
1258 } else {
1259 /*
1260 * If we are not forcing, there must be no
1261 * changes since fromsnap.
1262 */
1263 if (dsl_dataset_modified_since_snap(ds, snap)) {
428870ff 1264 dsl_dataset_rele(snap, FTAG);
19580676 1265 return (SET_ERROR(ETXTBSY));
428870ff 1266 }
19580676 1267 drba->drba_snapobj = ds->ds_prev->ds_object;
428870ff 1268 }
19580676
MA
1269
1270 dsl_dataset_rele(snap, FTAG);
428870ff 1271 } else {
cf50a2b0
AG
1272 /* if full, then must be forced */
1273 if (!drba->drba_cookie->drc_force)
1274 return (SET_ERROR(EEXIST));
1275 /* start from $ORIGIN@$ORIGIN, if supported */
1276 drba->drba_snapobj = dp->dp_origin_snap != NULL ?
1277 dp->dp_origin_snap->ds_object : 0;
428870ff 1278 }
34dc7c2f 1279
34dc7c2f 1280 return (0);
13fe0198
MA
1281
1282}
1283
1284static int
1285dmu_recv_begin_check(void *arg, dmu_tx_t *tx)
1286{
1287 dmu_recv_begin_arg_t *drba = arg;
1288 dsl_pool_t *dp = dmu_tx_pool(tx);
1289 struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
1290 uint64_t fromguid = drrb->drr_fromguid;
1291 int flags = drrb->drr_flags;
1292 int error;
9b67f605 1293 uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
13fe0198
MA
1294 dsl_dataset_t *ds;
1295 const char *tofs = drba->drba_cookie->drc_tofs;
1296
1297 /* already checked */
1298 ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC);
47dfff3b 1299 ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING));
13fe0198
MA
1300
1301 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
1302 DMU_COMPOUNDSTREAM ||
1303 drrb->drr_type >= DMU_OST_NUMTYPES ||
1304 ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL))
2e528b49 1305 return (SET_ERROR(EINVAL));
13fe0198
MA
1306
1307 /* Verify pool version supports SA if SA_SPILL feature set */
9b67f605
MA
1308 if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
1309 spa_version(dp->dp_spa) < SPA_VERSION_SA)
1310 return (SET_ERROR(ENOTSUP));
1311
47dfff3b
MA
1312 if (drba->drba_cookie->drc_resumable &&
1313 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET))
1314 return (SET_ERROR(ENOTSUP));
1315
9b67f605
MA
1316 /*
1317 * The receiving code doesn't know how to translate a WRITE_EMBEDDED
1318 * record to a plan WRITE record, so the pool must have the
1319 * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED
1320 * records. Same with WRITE_EMBEDDED records that use LZ4 compression.
1321 */
1322 if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) &&
1323 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA))
1324 return (SET_ERROR(ENOTSUP));
1325 if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) &&
1326 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS))
2e528b49 1327 return (SET_ERROR(ENOTSUP));
13fe0198 1328
f1512ee6
MA
1329 /*
1330 * The receiving code doesn't know how to translate large blocks
1331 * to smaller ones, so the pool must have the LARGE_BLOCKS
1332 * feature enabled if the stream has LARGE_BLOCKS.
1333 */
1334 if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) &&
1335 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS))
1336 return (SET_ERROR(ENOTSUP));
1337
50c957f7
NB
1338 /*
1339 * The receiving code doesn't know how to translate large dnodes
1340 * to smaller ones, so the pool must have the LARGE_DNODE
1341 * feature enabled if the stream has LARGE_DNODE.
1342 */
1343 if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) &&
1344 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_DNODE))
1345 return (SET_ERROR(ENOTSUP));
1346
13fe0198
MA
1347 error = dsl_dataset_hold(dp, tofs, FTAG, &ds);
1348 if (error == 0) {
1349 /* target fs already exists; recv into temp clone */
1350
1351 /* Can't recv a clone into an existing fs */
e6d3a843 1352 if (flags & DRR_FLAG_CLONE || drba->drba_origin) {
13fe0198 1353 dsl_dataset_rele(ds, FTAG);
2e528b49 1354 return (SET_ERROR(EINVAL));
13fe0198
MA
1355 }
1356
1357 error = recv_begin_check_existing_impl(drba, ds, fromguid);
1358 dsl_dataset_rele(ds, FTAG);
1359 } else if (error == ENOENT) {
1360 /* target fs does not exist; must be a full backup or clone */
eca7b760 1361 char buf[ZFS_MAX_DATASET_NAME_LEN];
13fe0198
MA
1362
1363 /*
1364 * If it's a non-clone incremental, we are missing the
1365 * target fs, so fail the recv.
1366 */
fcff0f35
PD
1367 if (fromguid != 0 && !(flags & DRR_FLAG_CLONE ||
1368 drba->drba_origin))
2e528b49 1369 return (SET_ERROR(ENOENT));
13fe0198 1370
e6d3a843
PD
1371 /*
1372 * If we're receiving a full send as a clone, and it doesn't
1373 * contain all the necessary free records and freeobject
1374 * records, reject it.
1375 */
1376 if (fromguid == 0 && drba->drba_origin &&
1377 !(flags & DRR_FLAG_FREERECORDS))
1378 return (SET_ERROR(EINVAL));
1379
13fe0198 1380 /* Open the parent of tofs */
eca7b760 1381 ASSERT3U(strlen(tofs), <, sizeof (buf));
13fe0198
MA
1382 (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1);
1383 error = dsl_dataset_hold(dp, buf, FTAG, &ds);
1384 if (error != 0)
1385 return (error);
1386
788eb90c
JJ
1387 /*
1388 * Check filesystem and snapshot limits before receiving. We'll
1389 * recheck snapshot limits again at the end (we create the
1390 * filesystems and increment those counts during begin_sync).
1391 */
1392 error = dsl_fs_ss_limit_check(ds->ds_dir, 1,
1393 ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred);
1394 if (error != 0) {
1395 dsl_dataset_rele(ds, FTAG);
1396 return (error);
1397 }
1398
1399 error = dsl_fs_ss_limit_check(ds->ds_dir, 1,
1400 ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred);
1401 if (error != 0) {
1402 dsl_dataset_rele(ds, FTAG);
1403 return (error);
1404 }
1405
13fe0198
MA
1406 if (drba->drba_origin != NULL) {
1407 dsl_dataset_t *origin;
1408 error = dsl_dataset_hold(dp, drba->drba_origin,
1409 FTAG, &origin);
1410 if (error != 0) {
1411 dsl_dataset_rele(ds, FTAG);
1412 return (error);
1413 }
0c66c32d 1414 if (!origin->ds_is_snapshot) {
13fe0198
MA
1415 dsl_dataset_rele(origin, FTAG);
1416 dsl_dataset_rele(ds, FTAG);
2e528b49 1417 return (SET_ERROR(EINVAL));
13fe0198 1418 }
e6d3a843
PD
1419 if (dsl_dataset_phys(origin)->ds_guid != fromguid &&
1420 fromguid != 0) {
13fe0198
MA
1421 dsl_dataset_rele(origin, FTAG);
1422 dsl_dataset_rele(ds, FTAG);
2e528b49 1423 return (SET_ERROR(ENODEV));
13fe0198
MA
1424 }
1425 dsl_dataset_rele(origin, FTAG);
1426 }
1427 dsl_dataset_rele(ds, FTAG);
1428 error = 0;
1429 }
1430 return (error);
34dc7c2f
BB
1431}
1432
34dc7c2f 1433static void
13fe0198 1434dmu_recv_begin_sync(void *arg, dmu_tx_t *tx)
34dc7c2f 1435{
13fe0198
MA
1436 dmu_recv_begin_arg_t *drba = arg;
1437 dsl_pool_t *dp = dmu_tx_pool(tx);
47dfff3b 1438 objset_t *mos = dp->dp_meta_objset;
13fe0198
MA
1439 struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
1440 const char *tofs = drba->drba_cookie->drc_tofs;
1441 dsl_dataset_t *ds, *newds;
34dc7c2f 1442 uint64_t dsobj;
13fe0198 1443 int error;
47dfff3b 1444 uint64_t crflags = 0;
13fe0198 1445
47dfff3b
MA
1446 if (drrb->drr_flags & DRR_FLAG_CI_DATA)
1447 crflags |= DS_FLAG_CI_DATASET;
34dc7c2f 1448
13fe0198
MA
1449 error = dsl_dataset_hold(dp, tofs, FTAG, &ds);
1450 if (error == 0) {
1451 /* create temporary clone */
19580676
MA
1452 dsl_dataset_t *snap = NULL;
1453 if (drba->drba_snapobj != 0) {
1454 VERIFY0(dsl_dataset_hold_obj(dp,
1455 drba->drba_snapobj, FTAG, &snap));
1456 }
13fe0198 1457 dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name,
19580676 1458 snap, crflags, drba->drba_cred, tx);
6b42ea85
PD
1459 if (drba->drba_snapobj != 0)
1460 dsl_dataset_rele(snap, FTAG);
13fe0198
MA
1461 dsl_dataset_rele(ds, FTAG);
1462 } else {
1463 dsl_dir_t *dd;
1464 const char *tail;
1465 dsl_dataset_t *origin = NULL;
1466
1467 VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail));
1468
1469 if (drba->drba_origin != NULL) {
1470 VERIFY0(dsl_dataset_hold(dp, drba->drba_origin,
1471 FTAG, &origin));
1472 }
1473
1474 /* Create new dataset. */
1475 dsobj = dsl_dataset_create_sync(dd,
1476 strrchr(tofs, '/') + 1,
1477 origin, crflags, drba->drba_cred, tx);
1478 if (origin != NULL)
1479 dsl_dataset_rele(origin, FTAG);
1480 dsl_dir_rele(dd, FTAG);
1481 drba->drba_cookie->drc_newfs = B_TRUE;
1482 }
1483 VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds));
1484
47dfff3b
MA
1485 if (drba->drba_cookie->drc_resumable) {
1486 uint64_t one = 1;
1487 uint64_t zero = 0;
1488
1489 dsl_dataset_zapify(newds, tx);
1490 if (drrb->drr_fromguid != 0) {
1491 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID,
1492 8, 1, &drrb->drr_fromguid, tx));
1493 }
1494 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID,
1495 8, 1, &drrb->drr_toguid, tx));
1496 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME,
1497 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx));
1498 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT,
1499 8, 1, &one, tx));
1500 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET,
1501 8, 1, &zero, tx));
1502 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES,
1503 8, 1, &zero, tx));
1504 if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) &
1505 DMU_BACKUP_FEATURE_EMBED_DATA) {
1506 VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK,
1507 8, 1, &one, tx));
1508 }
1509 }
1510
13fe0198 1511 dmu_buf_will_dirty(newds->ds_dbuf, tx);
d683ddbb 1512 dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT;
34dc7c2f 1513
428870ff
BB
1514 /*
1515 * If we actually created a non-clone, we need to create the
1516 * objset in our new dataset.
1517 */
13fe0198 1518 if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) {
428870ff 1519 (void) dmu_objset_create_impl(dp->dp_spa,
13fe0198 1520 newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx);
428870ff 1521 }
34dc7c2f 1522
13fe0198 1523 drba->drba_cookie->drc_ds = newds;
428870ff 1524
13fe0198 1525 spa_history_log_internal_ds(newds, "receive", tx, "");
34dc7c2f
BB
1526}
1527
47dfff3b
MA
1528static int
1529dmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx)
1530{
1531 dmu_recv_begin_arg_t *drba = arg;
1532 dsl_pool_t *dp = dmu_tx_pool(tx);
1533 struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
1534 int error;
1535 uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
1536 dsl_dataset_t *ds;
1537 const char *tofs = drba->drba_cookie->drc_tofs;
47dfff3b
MA
1538 uint64_t val;
1539
eca7b760
IK
1540 /* 6 extra bytes for /%recv */
1541 char recvname[ZFS_MAX_DATASET_NAME_LEN + 6];
1542
47dfff3b
MA
1543 /* already checked */
1544 ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC);
1545 ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING);
1546
1547 if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) ==
1548 DMU_COMPOUNDSTREAM ||
1549 drrb->drr_type >= DMU_OST_NUMTYPES)
1550 return (SET_ERROR(EINVAL));
1551
1552 /* Verify pool version supports SA if SA_SPILL feature set */
1553 if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
1554 spa_version(dp->dp_spa) < SPA_VERSION_SA)
1555 return (SET_ERROR(ENOTSUP));
1556
1557 /*
1558 * The receiving code doesn't know how to translate a WRITE_EMBEDDED
1559 * record to a plain WRITE record, so the pool must have the
1560 * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED
1561 * records. Same with WRITE_EMBEDDED records that use LZ4 compression.
1562 */
1563 if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) &&
1564 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA))
1565 return (SET_ERROR(ENOTSUP));
1566 if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) &&
1567 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS))
1568 return (SET_ERROR(ENOTSUP));
1569
1570 (void) snprintf(recvname, sizeof (recvname), "%s/%s",
1571 tofs, recv_clone_name);
1572
1573 if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) {
1574 /* %recv does not exist; continue in tofs */
1575 error = dsl_dataset_hold(dp, tofs, FTAG, &ds);
1576 if (error != 0)
1577 return (error);
1578 }
1579
1580 /* check that ds is marked inconsistent */
1581 if (!DS_IS_INCONSISTENT(ds)) {
1582 dsl_dataset_rele(ds, FTAG);
1583 return (SET_ERROR(EINVAL));
1584 }
1585
1586 /* check that there is resuming data, and that the toguid matches */
1587 if (!dsl_dataset_is_zapified(ds)) {
1588 dsl_dataset_rele(ds, FTAG);
1589 return (SET_ERROR(EINVAL));
1590 }
1591 error = zap_lookup(dp->dp_meta_objset, ds->ds_object,
1592 DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val);
1593 if (error != 0 || drrb->drr_toguid != val) {
1594 dsl_dataset_rele(ds, FTAG);
1595 return (SET_ERROR(EINVAL));
1596 }
1597
1598 /*
1599 * Check if the receive is still running. If so, it will be owned.
1600 * Note that nothing else can own the dataset (e.g. after the receive
1601 * fails) because it will be marked inconsistent.
1602 */
1603 if (dsl_dataset_has_owner(ds)) {
1604 dsl_dataset_rele(ds, FTAG);
1605 return (SET_ERROR(EBUSY));
1606 }
1607
1608 /* There should not be any snapshots of this fs yet. */
1609 if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) {
1610 dsl_dataset_rele(ds, FTAG);
1611 return (SET_ERROR(EINVAL));
1612 }
1613
1614 /*
1615 * Note: resume point will be checked when we process the first WRITE
1616 * record.
1617 */
1618
1619 /* check that the origin matches */
1620 val = 0;
1621 (void) zap_lookup(dp->dp_meta_objset, ds->ds_object,
1622 DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val);
1623 if (drrb->drr_fromguid != val) {
1624 dsl_dataset_rele(ds, FTAG);
1625 return (SET_ERROR(EINVAL));
1626 }
1627
1628 dsl_dataset_rele(ds, FTAG);
1629 return (0);
1630}
1631
1632static void
1633dmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx)
1634{
1635 dmu_recv_begin_arg_t *drba = arg;
1636 dsl_pool_t *dp = dmu_tx_pool(tx);
1637 const char *tofs = drba->drba_cookie->drc_tofs;
1638 dsl_dataset_t *ds;
1639 uint64_t dsobj;
eca7b760
IK
1640 /* 6 extra bytes for /%recv */
1641 char recvname[ZFS_MAX_DATASET_NAME_LEN + 6];
47dfff3b
MA
1642
1643 (void) snprintf(recvname, sizeof (recvname), "%s/%s",
1644 tofs, recv_clone_name);
1645
1646 if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) {
1647 /* %recv does not exist; continue in tofs */
1648 VERIFY0(dsl_dataset_hold(dp, tofs, FTAG, &ds));
1649 drba->drba_cookie->drc_newfs = B_TRUE;
1650 }
1651
1652 /* clear the inconsistent flag so that we can own it */
1653 ASSERT(DS_IS_INCONSISTENT(ds));
1654 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1655 dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT;
1656 dsobj = ds->ds_object;
1657 dsl_dataset_rele(ds, FTAG);
1658
1659 VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &ds));
1660
1661 dmu_buf_will_dirty(ds->ds_dbuf, tx);
1662 dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT;
1663
1664 ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds)));
1665
1666 drba->drba_cookie->drc_ds = ds;
1667
1668 spa_history_log_internal_ds(ds, "resume receive", tx, "");
1669}
1670
34dc7c2f
BB
1671/*
1672 * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
1673 * succeeds; otherwise we will leak the holds on the datasets.
1674 */
1675int
47dfff3b
MA
1676dmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin,
1677 boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc)
34dc7c2f 1678{
13fe0198 1679 dmu_recv_begin_arg_t drba = { 0 };
34dc7c2f
BB
1680
1681 bzero(drc, sizeof (dmu_recv_cookie_t));
47dfff3b
MA
1682 drc->drc_drr_begin = drr_begin;
1683 drc->drc_drrb = &drr_begin->drr_u.drr_begin;
34dc7c2f 1684 drc->drc_tosnap = tosnap;
13fe0198 1685 drc->drc_tofs = tofs;
34dc7c2f 1686 drc->drc_force = force;
47dfff3b 1687 drc->drc_resumable = resumable;
788eb90c 1688 drc->drc_cred = CRED();
34dc7c2f 1689
47dfff3b 1690 if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) {
13fe0198 1691 drc->drc_byteswap = B_TRUE;
47dfff3b 1692 fletcher_4_incremental_byteswap(drr_begin,
13fe0198 1693 sizeof (dmu_replay_record_t), &drc->drc_cksum);
47dfff3b
MA
1694 byteswap_record(drr_begin);
1695 } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) {
1696 fletcher_4_incremental_native(drr_begin,
13fe0198 1697 sizeof (dmu_replay_record_t), &drc->drc_cksum);
47dfff3b
MA
1698 } else {
1699 return (SET_ERROR(EINVAL));
34dc7c2f
BB
1700 }
1701
13fe0198
MA
1702 drba.drba_origin = origin;
1703 drba.drba_cookie = drc;
1704 drba.drba_cred = CRED();
1705
47dfff3b
MA
1706 if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) &
1707 DMU_BACKUP_FEATURE_RESUMING) {
1708 return (dsl_sync_task(tofs,
1709 dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync,
1710 &drba, 5, ZFS_SPACE_CHECK_NORMAL));
1711 } else {
1712 return (dsl_sync_task(tofs,
1713 dmu_recv_begin_check, dmu_recv_begin_sync,
1714 &drba, 5, ZFS_SPACE_CHECK_NORMAL));
1715 }
34dc7c2f
BB
1716}
1717
fcff0f35
PD
1718struct receive_record_arg {
1719 dmu_replay_record_t header;
1720 void *payload; /* Pointer to a buffer containing the payload */
1721 /*
1722 * If the record is a write, pointer to the arc_buf_t containing the
1723 * payload.
1724 */
1725 arc_buf_t *write_buf;
1726 int payload_size;
47dfff3b 1727 uint64_t bytes_read; /* bytes read from stream when record created */
fcff0f35
PD
1728 boolean_t eos_marker; /* Marks the end of the stream */
1729 bqueue_node_t node;
1730};
1731
1732struct receive_writer_arg {
37f8a883 1733 objset_t *os;
13fe0198 1734 boolean_t byteswap;
fcff0f35 1735 bqueue_t q;
47dfff3b 1736
fcff0f35
PD
1737 /*
1738 * These three args are used to signal to the main thread that we're
1739 * done.
1740 */
1741 kmutex_t mutex;
1742 kcondvar_t cv;
1743 boolean_t done;
47dfff3b 1744
fcff0f35
PD
1745 int err;
1746 /* A map from guid to dataset to help handle dedup'd streams. */
1747 avl_tree_t *guid_to_ds_map;
47dfff3b
MA
1748 boolean_t resumable;
1749 uint64_t last_object, last_offset;
1750 uint64_t bytes_read; /* bytes read when current record created */
fcff0f35 1751};
37f8a883 1752
e6d3a843
PD
1753struct objlist {
1754 list_t list; /* List of struct receive_objnode. */
1755 /*
1756 * Last object looked up. Used to assert that objects are being looked
1757 * up in ascending order.
1758 */
1759 uint64_t last_lookup;
1760};
1761
1762struct receive_objnode {
1763 list_node_t node;
1764 uint64_t object;
1765};
1766
fcff0f35
PD
1767struct receive_arg {
1768 objset_t *os;
1769 vnode_t *vp; /* The vnode to read the stream from */
1770 uint64_t voff; /* The current offset in the stream */
47dfff3b 1771 uint64_t bytes_read;
fcff0f35
PD
1772 /*
1773 * A record that has had its payload read in, but hasn't yet been handed
1774 * off to the worker thread.
1775 */
1776 struct receive_record_arg *rrd;
1777 /* A record that has had its header read in, but not its payload. */
1778 struct receive_record_arg *next_rrd;
34dc7c2f 1779 zio_cksum_t cksum;
37f8a883 1780 zio_cksum_t prev_cksum;
fcff0f35
PD
1781 int err;
1782 boolean_t byteswap;
1783 /* Sorted list of objects not to issue prefetches for. */
e6d3a843 1784 struct objlist ignore_objlist;
34dc7c2f
BB
1785};
1786
428870ff
BB
1787typedef struct guid_map_entry {
1788 uint64_t guid;
1789 dsl_dataset_t *gme_ds;
1790 avl_node_t avlnode;
1791} guid_map_entry_t;
1792
1793static int
1794guid_compare(const void *arg1, const void *arg2)
1795{
ee36c709
GN
1796 const guid_map_entry_t *gmep1 = (const guid_map_entry_t *)arg1;
1797 const guid_map_entry_t *gmep2 = (const guid_map_entry_t *)arg2;
428870ff 1798
ee36c709 1799 return (AVL_CMP(gmep1->guid, gmep2->guid));
428870ff
BB
1800}
1801
572e2857
BB
1802static void
1803free_guid_map_onexit(void *arg)
1804{
1805 avl_tree_t *ca = arg;
1806 void *cookie = NULL;
1807 guid_map_entry_t *gmep;
1808
1809 while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
13fe0198 1810 dsl_dataset_long_rele(gmep->gme_ds, gmep);
7ec09286 1811 dsl_dataset_rele(gmep->gme_ds, gmep);
572e2857
BB
1812 kmem_free(gmep, sizeof (guid_map_entry_t));
1813 }
1814 avl_destroy(ca);
1815 kmem_free(ca, sizeof (avl_tree_t));
1816}
1817
37f8a883 1818static int
fcff0f35 1819receive_read(struct receive_arg *ra, int len, void *buf)
34dc7c2f 1820{
34dc7c2f
BB
1821 int done = 0;
1822
f8866f8a
ER
1823 /*
1824 * The code doesn't rely on this (lengths being multiples of 8). See
1825 * comment in dump_bytes.
1826 */
c99c9001 1827 ASSERT0(len % 8);
34dc7c2f
BB
1828
1829 while (done < len) {
1830 ssize_t resid;
1831
1832 ra->err = vn_rdwr(UIO_READ, ra->vp,
37f8a883 1833 (char *)buf + done, len - done,
34dc7c2f
BB
1834 ra->voff, UIO_SYSSPACE, FAPPEND,
1835 RLIM64_INFINITY, CRED(), &resid);
1836
47dfff3b
MA
1837 if (resid == len - done) {
1838 /*
1839 * Note: ECKSUM indicates that the receive
1840 * was interrupted and can potentially be resumed.
1841 */
1842 ra->err = SET_ERROR(ECKSUM);
1843 }
34dc7c2f
BB
1844 ra->voff += len - done - resid;
1845 done = len - resid;
13fe0198 1846 if (ra->err != 0)
37f8a883 1847 return (ra->err);
34dc7c2f
BB
1848 }
1849
47dfff3b
MA
1850 ra->bytes_read += len;
1851
34dc7c2f 1852 ASSERT3U(done, ==, len);
37f8a883 1853 return (0);
34dc7c2f
BB
1854}
1855
60948de1 1856noinline static void
37f8a883 1857byteswap_record(dmu_replay_record_t *drr)
34dc7c2f
BB
1858{
1859#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
1860#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
1861 drr->drr_type = BSWAP_32(drr->drr_type);
1862 drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
37f8a883 1863
34dc7c2f
BB
1864 switch (drr->drr_type) {
1865 case DRR_BEGIN:
1866 DO64(drr_begin.drr_magic);
428870ff 1867 DO64(drr_begin.drr_versioninfo);
34dc7c2f
BB
1868 DO64(drr_begin.drr_creation_time);
1869 DO32(drr_begin.drr_type);
1870 DO32(drr_begin.drr_flags);
1871 DO64(drr_begin.drr_toguid);
1872 DO64(drr_begin.drr_fromguid);
1873 break;
1874 case DRR_OBJECT:
1875 DO64(drr_object.drr_object);
34dc7c2f
BB
1876 DO32(drr_object.drr_type);
1877 DO32(drr_object.drr_bonustype);
1878 DO32(drr_object.drr_blksz);
1879 DO32(drr_object.drr_bonuslen);
428870ff 1880 DO64(drr_object.drr_toguid);
34dc7c2f
BB
1881 break;
1882 case DRR_FREEOBJECTS:
1883 DO64(drr_freeobjects.drr_firstobj);
1884 DO64(drr_freeobjects.drr_numobjs);
428870ff 1885 DO64(drr_freeobjects.drr_toguid);
34dc7c2f
BB
1886 break;
1887 case DRR_WRITE:
1888 DO64(drr_write.drr_object);
1889 DO32(drr_write.drr_type);
1890 DO64(drr_write.drr_offset);
1891 DO64(drr_write.drr_length);
428870ff 1892 DO64(drr_write.drr_toguid);
37f8a883 1893 ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum);
428870ff
BB
1894 DO64(drr_write.drr_key.ddk_prop);
1895 break;
1896 case DRR_WRITE_BYREF:
1897 DO64(drr_write_byref.drr_object);
1898 DO64(drr_write_byref.drr_offset);
1899 DO64(drr_write_byref.drr_length);
1900 DO64(drr_write_byref.drr_toguid);
1901 DO64(drr_write_byref.drr_refguid);
1902 DO64(drr_write_byref.drr_refobject);
1903 DO64(drr_write_byref.drr_refoffset);
37f8a883
MA
1904 ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref.
1905 drr_key.ddk_cksum);
428870ff 1906 DO64(drr_write_byref.drr_key.ddk_prop);
34dc7c2f 1907 break;
9b67f605
MA
1908 case DRR_WRITE_EMBEDDED:
1909 DO64(drr_write_embedded.drr_object);
1910 DO64(drr_write_embedded.drr_offset);
1911 DO64(drr_write_embedded.drr_length);
1912 DO64(drr_write_embedded.drr_toguid);
1913 DO32(drr_write_embedded.drr_lsize);
1914 DO32(drr_write_embedded.drr_psize);
1915 break;
34dc7c2f
BB
1916 case DRR_FREE:
1917 DO64(drr_free.drr_object);
1918 DO64(drr_free.drr_offset);
1919 DO64(drr_free.drr_length);
428870ff
BB
1920 DO64(drr_free.drr_toguid);
1921 break;
1922 case DRR_SPILL:
1923 DO64(drr_spill.drr_object);
1924 DO64(drr_spill.drr_length);
1925 DO64(drr_spill.drr_toguid);
34dc7c2f
BB
1926 break;
1927 case DRR_END:
428870ff 1928 DO64(drr_end.drr_toguid);
37f8a883 1929 ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum);
34dc7c2f 1930 break;
e75c13c3
BB
1931 default:
1932 break;
34dc7c2f 1933 }
37f8a883
MA
1934
1935 if (drr->drr_type != DRR_BEGIN) {
1936 ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum);
1937 }
1938
34dc7c2f
BB
1939#undef DO64
1940#undef DO32
1941}
1942
6c59307a
MA
1943static inline uint8_t
1944deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size)
1945{
1946 if (bonus_type == DMU_OT_SA) {
1947 return (1);
1948 } else {
1949 return (1 +
50c957f7
NB
1950 ((DN_OLD_MAX_BONUSLEN -
1951 MIN(DN_OLD_MAX_BONUSLEN, bonus_size)) >> SPA_BLKPTRSHIFT));
6c59307a
MA
1952 }
1953}
1954
47dfff3b
MA
1955static void
1956save_resume_state(struct receive_writer_arg *rwa,
1957 uint64_t object, uint64_t offset, dmu_tx_t *tx)
1958{
1959 int txgoff = dmu_tx_get_txg(tx) & TXG_MASK;
1960
1961 if (!rwa->resumable)
1962 return;
1963
1964 /*
1965 * We use ds_resume_bytes[] != 0 to indicate that we need to
1966 * update this on disk, so it must not be 0.
1967 */
1968 ASSERT(rwa->bytes_read != 0);
1969
1970 /*
1971 * We only resume from write records, which have a valid
1972 * (non-meta-dnode) object number.
1973 */
1974 ASSERT(object != 0);
1975
1976 /*
1977 * For resuming to work correctly, we must receive records in order,
1978 * sorted by object,offset. This is checked by the callers, but
1979 * assert it here for good measure.
1980 */
1981 ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]);
1982 ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] ||
1983 offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]);
1984 ASSERT3U(rwa->bytes_read, >=,
1985 rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]);
1986
1987 rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object;
1988 rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset;
1989 rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read;
1990}
1991
60948de1 1992noinline static int
fcff0f35
PD
1993receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
1994 void *data)
34dc7c2f 1995{
6c59307a 1996 dmu_object_info_t doi;
34dc7c2f 1997 dmu_tx_t *tx;
6c59307a
MA
1998 uint64_t object;
1999 int err;
34dc7c2f 2000
34dc7c2f 2001 if (drro->drr_type == DMU_OT_NONE ||
9ae529ec
CS
2002 !DMU_OT_IS_VALID(drro->drr_type) ||
2003 !DMU_OT_IS_VALID(drro->drr_bonustype) ||
428870ff 2004 drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
34dc7c2f
BB
2005 drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
2006 P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
2007 drro->drr_blksz < SPA_MINBLOCKSIZE ||
fcff0f35 2008 drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) ||
50c957f7
NB
2009 drro->drr_bonuslen >
2010 DN_BONUS_SIZE(spa_maxdnodesize(dmu_objset_spa(rwa->os)))) {
2e528b49 2011 return (SET_ERROR(EINVAL));
34dc7c2f
BB
2012 }
2013
fcff0f35 2014 err = dmu_object_info(rwa->os, drro->drr_object, &doi);
9babb374
BB
2015
2016 if (err != 0 && err != ENOENT)
2e528b49 2017 return (SET_ERROR(EINVAL));
6c59307a 2018 object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT;
9babb374 2019
6c59307a
MA
2020 /*
2021 * If we are losing blkptrs or changing the block size this must
2022 * be a new file instance. We must clear out the previous file
2023 * contents before we can change this type of metadata in the dnode.
2024 */
2025 if (err == 0) {
2026 int nblkptr;
2027
2028 nblkptr = deduce_nblkptr(drro->drr_bonustype,
2029 drro->drr_bonuslen);
2030
2031 if (drro->drr_blksz != doi.doi_data_block_size ||
2032 nblkptr < doi.doi_nblkptr) {
fcff0f35 2033 err = dmu_free_long_range(rwa->os, drro->drr_object,
6c59307a
MA
2034 0, DMU_OBJECT_END);
2035 if (err != 0)
2036 return (SET_ERROR(EINVAL));
34dc7c2f 2037 }
6c59307a
MA
2038 }
2039
fcff0f35 2040 tx = dmu_tx_create(rwa->os);
6c59307a
MA
2041 dmu_tx_hold_bonus(tx, object);
2042 err = dmu_tx_assign(tx, TXG_WAIT);
2043 if (err != 0) {
2044 dmu_tx_abort(tx);
2045 return (err);
2046 }
2047
2048 if (object == DMU_NEW_OBJECT) {
2049 /* currently free, want to be allocated */
50c957f7 2050 err = dmu_object_claim_dnsize(rwa->os, drro->drr_object,
34dc7c2f 2051 drro->drr_type, drro->drr_blksz,
50c957f7
NB
2052 drro->drr_bonustype, drro->drr_bonuslen,
2053 drro->drr_dn_slots << DNODE_SHIFT, tx);
6c59307a
MA
2054 } else if (drro->drr_type != doi.doi_type ||
2055 drro->drr_blksz != doi.doi_data_block_size ||
2056 drro->drr_bonustype != doi.doi_bonus_type ||
2057 drro->drr_bonuslen != doi.doi_bonus_size) {
2058 /* currently allocated, but with different properties */
fcff0f35 2059 err = dmu_object_reclaim(rwa->os, drro->drr_object,
34dc7c2f 2060 drro->drr_type, drro->drr_blksz,
6c59307a 2061 drro->drr_bonustype, drro->drr_bonuslen, tx);
34dc7c2f 2062 }
13fe0198 2063 if (err != 0) {
6c59307a 2064 dmu_tx_commit(tx);
2e528b49 2065 return (SET_ERROR(EINVAL));
428870ff 2066 }
9babb374 2067
fcff0f35 2068 dmu_object_set_checksum(rwa->os, drro->drr_object,
37f8a883 2069 drro->drr_checksumtype, tx);
fcff0f35 2070 dmu_object_set_compress(rwa->os, drro->drr_object,
37f8a883 2071 drro->drr_compress, tx);
34dc7c2f 2072
b128c09f 2073 if (data != NULL) {
34dc7c2f 2074 dmu_buf_t *db;
b128c09f 2075
fcff0f35 2076 VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db));
34dc7c2f
BB
2077 dmu_buf_will_dirty(db, tx);
2078
2079 ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
34dc7c2f 2080 bcopy(data, db->db_data, drro->drr_bonuslen);
fcff0f35 2081 if (rwa->byteswap) {
9ae529ec
CS
2082 dmu_object_byteswap_t byteswap =
2083 DMU_OT_BYTESWAP(drro->drr_bonustype);
2084 dmu_ot_byteswap[byteswap].ob_func(db->db_data,
34dc7c2f
BB
2085 drro->drr_bonuslen);
2086 }
2087 dmu_buf_rele(db, FTAG);
2088 }
2089 dmu_tx_commit(tx);
47dfff3b 2090
34dc7c2f
BB
2091 return (0);
2092}
2093
2094/* ARGSUSED */
60948de1 2095noinline static int
fcff0f35 2096receive_freeobjects(struct receive_writer_arg *rwa,
34dc7c2f
BB
2097 struct drr_freeobjects *drrfo)
2098{
2099 uint64_t obj;
e6d3a843 2100 int next_err = 0;
34dc7c2f
BB
2101
2102 if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
2e528b49 2103 return (SET_ERROR(EINVAL));
34dc7c2f 2104
50c957f7 2105 for (obj = drrfo->drr_firstobj == 0 ? 1 : drrfo->drr_firstobj;
e6d3a843
PD
2106 obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0;
2107 next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) {
50c957f7 2108 dmu_object_info_t doi;
34dc7c2f
BB
2109 int err;
2110
50c957f7
NB
2111 err = dmu_object_info(rwa->os, obj, &doi);
2112 if (err == ENOENT) {
2113 obj++;
34dc7c2f 2114 continue;
50c957f7
NB
2115 } else if (err != 0) {
2116 return (err);
2117 }
34dc7c2f 2118
fcff0f35 2119 err = dmu_free_long_object(rwa->os, obj);
13fe0198 2120 if (err != 0)
34dc7c2f 2121 return (err);
34dc7c2f 2122 }
e6d3a843
PD
2123 if (next_err != ESRCH)
2124 return (next_err);
34dc7c2f
BB
2125 return (0);
2126}
2127
60948de1 2128noinline static int
fcff0f35
PD
2129receive_write(struct receive_writer_arg *rwa, struct drr_write *drrw,
2130 arc_buf_t *abuf)
34dc7c2f
BB
2131{
2132 dmu_tx_t *tx;
88904bb3 2133 dmu_buf_t *bonus;
34dc7c2f
BB
2134 int err;
2135
2136 if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
9ae529ec 2137 !DMU_OT_IS_VALID(drrw->drr_type))
2e528b49 2138 return (SET_ERROR(EINVAL));
34dc7c2f 2139
47dfff3b
MA
2140 /*
2141 * For resuming to work, records must be in increasing order
2142 * by (object, offset).
2143 */
2144 if (drrw->drr_object < rwa->last_object ||
2145 (drrw->drr_object == rwa->last_object &&
2146 drrw->drr_offset < rwa->last_offset)) {
2147 return (SET_ERROR(EINVAL));
2148 }
2149 rwa->last_object = drrw->drr_object;
2150 rwa->last_offset = drrw->drr_offset;
2151
fcff0f35 2152 if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0)
88904bb3
MA
2153 return (SET_ERROR(EINVAL));
2154
fcff0f35 2155 tx = dmu_tx_create(rwa->os);
34dc7c2f
BB
2156
2157 dmu_tx_hold_write(tx, drrw->drr_object,
2158 drrw->drr_offset, drrw->drr_length);
2159 err = dmu_tx_assign(tx, TXG_WAIT);
13fe0198 2160 if (err != 0) {
34dc7c2f
BB
2161 dmu_tx_abort(tx);
2162 return (err);
2163 }
fcff0f35 2164 if (rwa->byteswap) {
9ae529ec
CS
2165 dmu_object_byteswap_t byteswap =
2166 DMU_OT_BYTESWAP(drrw->drr_type);
37f8a883
MA
2167 dmu_ot_byteswap[byteswap].ob_func(abuf->b_data,
2168 drrw->drr_length);
9ae529ec 2169 }
37f8a883 2170
fcff0f35 2171 if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0)
37f8a883 2172 return (SET_ERROR(EINVAL));
88904bb3 2173 dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx);
47dfff3b
MA
2174
2175 /*
2176 * Note: If the receive fails, we want the resume stream to start
2177 * with the same record that we last successfully received (as opposed
2178 * to the next record), so that we can verify that we are
2179 * resuming from the correct location.
2180 */
2181 save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx);
34dc7c2f 2182 dmu_tx_commit(tx);
88904bb3 2183 dmu_buf_rele(bonus, FTAG);
47dfff3b 2184
34dc7c2f
BB
2185 return (0);
2186}
2187
428870ff
BB
2188/*
2189 * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
2190 * streams to refer to a copy of the data that is already on the
2191 * system because it came in earlier in the stream. This function
2192 * finds the earlier copy of the data, and uses that copy instead of
2193 * data from the stream to fulfill this write.
2194 */
2195static int
fcff0f35
PD
2196receive_write_byref(struct receive_writer_arg *rwa,
2197 struct drr_write_byref *drrwbr)
428870ff
BB
2198{
2199 dmu_tx_t *tx;
2200 int err;
2201 guid_map_entry_t gmesrch;
2202 guid_map_entry_t *gmep;
9b67f605 2203 avl_index_t where;
428870ff
BB
2204 objset_t *ref_os = NULL;
2205 dmu_buf_t *dbp;
2206
2207 if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
2e528b49 2208 return (SET_ERROR(EINVAL));
428870ff
BB
2209
2210 /*
2211 * If the GUID of the referenced dataset is different from the
2212 * GUID of the target dataset, find the referenced dataset.
2213 */
2214 if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
2215 gmesrch.guid = drrwbr->drr_refguid;
fcff0f35 2216 if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch,
428870ff 2217 &where)) == NULL) {
2e528b49 2218 return (SET_ERROR(EINVAL));
428870ff
BB
2219 }
2220 if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
2e528b49 2221 return (SET_ERROR(EINVAL));
428870ff 2222 } else {
fcff0f35 2223 ref_os = rwa->os;
428870ff
BB
2224 }
2225
c65aa5b2
BB
2226 err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
2227 drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH);
9b67f605 2228 if (err != 0)
428870ff
BB
2229 return (err);
2230
fcff0f35 2231 tx = dmu_tx_create(rwa->os);
428870ff
BB
2232
2233 dmu_tx_hold_write(tx, drrwbr->drr_object,
2234 drrwbr->drr_offset, drrwbr->drr_length);
2235 err = dmu_tx_assign(tx, TXG_WAIT);
13fe0198 2236 if (err != 0) {
428870ff
BB
2237 dmu_tx_abort(tx);
2238 return (err);
2239 }
fcff0f35 2240 dmu_write(rwa->os, drrwbr->drr_object,
428870ff
BB
2241 drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
2242 dmu_buf_rele(dbp, FTAG);
47dfff3b
MA
2243
2244 /* See comment in restore_write. */
2245 save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx);
428870ff
BB
2246 dmu_tx_commit(tx);
2247 return (0);
2248}
2249
9b67f605 2250static int
fcff0f35 2251receive_write_embedded(struct receive_writer_arg *rwa,
47dfff3b 2252 struct drr_write_embedded *drrwe, void *data)
9b67f605
MA
2253{
2254 dmu_tx_t *tx;
2255 int err;
9b67f605 2256
47dfff3b 2257 if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset)
9b67f605
MA
2258 return (EINVAL);
2259
47dfff3b 2260 if (drrwe->drr_psize > BPE_PAYLOAD_SIZE)
9b67f605
MA
2261 return (EINVAL);
2262
47dfff3b 2263 if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES)
9b67f605 2264 return (EINVAL);
47dfff3b 2265 if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS)
9b67f605
MA
2266 return (EINVAL);
2267
fcff0f35 2268 tx = dmu_tx_create(rwa->os);
9b67f605 2269
47dfff3b
MA
2270 dmu_tx_hold_write(tx, drrwe->drr_object,
2271 drrwe->drr_offset, drrwe->drr_length);
9b67f605
MA
2272 err = dmu_tx_assign(tx, TXG_WAIT);
2273 if (err != 0) {
2274 dmu_tx_abort(tx);
2275 return (err);
2276 }
2277
47dfff3b
MA
2278 dmu_write_embedded(rwa->os, drrwe->drr_object,
2279 drrwe->drr_offset, data, drrwe->drr_etype,
2280 drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize,
fcff0f35 2281 rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx);
9b67f605 2282
47dfff3b
MA
2283 /* See comment in restore_write. */
2284 save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx);
9b67f605
MA
2285 dmu_tx_commit(tx);
2286 return (0);
2287}
2288
428870ff 2289static int
fcff0f35
PD
2290receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
2291 void *data)
428870ff
BB
2292{
2293 dmu_tx_t *tx;
428870ff
BB
2294 dmu_buf_t *db, *db_spill;
2295 int err;
2296
2297 if (drrs->drr_length < SPA_MINBLOCKSIZE ||
fcff0f35 2298 drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os)))
2e528b49 2299 return (SET_ERROR(EINVAL));
428870ff 2300
fcff0f35 2301 if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0)
2e528b49 2302 return (SET_ERROR(EINVAL));
428870ff 2303
fcff0f35 2304 VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db));
428870ff
BB
2305 if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
2306 dmu_buf_rele(db, FTAG);
2307 return (err);
2308 }
2309
fcff0f35 2310 tx = dmu_tx_create(rwa->os);
428870ff
BB
2311
2312 dmu_tx_hold_spill(tx, db->db_object);
2313
2314 err = dmu_tx_assign(tx, TXG_WAIT);
13fe0198 2315 if (err != 0) {
428870ff
BB
2316 dmu_buf_rele(db, FTAG);
2317 dmu_buf_rele(db_spill, FTAG);
2318 dmu_tx_abort(tx);
2319 return (err);
2320 }
2321 dmu_buf_will_dirty(db_spill, tx);
2322
2323 if (db_spill->db_size < drrs->drr_length)
2324 VERIFY(0 == dbuf_spill_set_blksz(db_spill,
2325 drrs->drr_length, tx));
2326 bcopy(data, db_spill->db_data, drrs->drr_length);
2327
2328 dmu_buf_rele(db, FTAG);
2329 dmu_buf_rele(db_spill, FTAG);
2330
2331 dmu_tx_commit(tx);
2332 return (0);
2333}
2334
34dc7c2f 2335/* ARGSUSED */
60948de1 2336noinline static int
fcff0f35 2337receive_free(struct receive_writer_arg *rwa, struct drr_free *drrf)
34dc7c2f 2338{
34dc7c2f
BB
2339 int err;
2340
2341 if (drrf->drr_length != -1ULL &&
2342 drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
2e528b49 2343 return (SET_ERROR(EINVAL));
34dc7c2f 2344
fcff0f35 2345 if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0)
2e528b49 2346 return (SET_ERROR(EINVAL));
34dc7c2f 2347
fcff0f35 2348 err = dmu_free_long_range(rwa->os, drrf->drr_object,
34dc7c2f 2349 drrf->drr_offset, drrf->drr_length);
fcff0f35 2350
34dc7c2f
BB
2351 return (err);
2352}
2353
13fe0198
MA
2354/* used to destroy the drc_ds on error */
2355static void
2356dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc)
2357{
47dfff3b
MA
2358 if (drc->drc_resumable) {
2359 /* wait for our resume state to be written to disk */
2360 txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0);
2361 dsl_dataset_disown(drc->drc_ds, dmu_recv_tag);
2362 } else {
eca7b760 2363 char name[ZFS_MAX_DATASET_NAME_LEN];
47dfff3b
MA
2364 dsl_dataset_name(drc->drc_ds, name);
2365 dsl_dataset_disown(drc->drc_ds, dmu_recv_tag);
2366 (void) dsl_destroy_head(name);
2367 }
13fe0198
MA
2368}
2369
37f8a883 2370static void
fcff0f35 2371receive_cksum(struct receive_arg *ra, int len, void *buf)
37f8a883
MA
2372{
2373 if (ra->byteswap) {
2374 fletcher_4_incremental_byteswap(buf, len, &ra->cksum);
2375 } else {
2376 fletcher_4_incremental_native(buf, len, &ra->cksum);
2377 }
2378}
2379
2380/*
fcff0f35
PD
2381 * Read the payload into a buffer of size len, and update the current record's
2382 * payload field.
2383 * Allocate ra->next_rrd and read the next record's header into
2384 * ra->next_rrd->header.
37f8a883
MA
2385 * Verify checksum of payload and next record.
2386 */
2387static int
fcff0f35 2388receive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf)
37f8a883
MA
2389{
2390 int err;
2391 zio_cksum_t cksum_orig;
2392 zio_cksum_t *cksump;
2393
2394 if (len != 0) {
fcff0f35 2395 ASSERT3U(len, <=, SPA_MAXBLOCKSIZE);
47dfff3b 2396 err = receive_read(ra, len, buf);
37f8a883
MA
2397 if (err != 0)
2398 return (err);
47dfff3b
MA
2399 receive_cksum(ra, len, buf);
2400
2401 /* note: rrd is NULL when reading the begin record's payload */
2402 if (ra->rrd != NULL) {
2403 ra->rrd->payload = buf;
2404 ra->rrd->payload_size = len;
2405 ra->rrd->bytes_read = ra->bytes_read;
2406 }
37f8a883
MA
2407 }
2408
2409 ra->prev_cksum = ra->cksum;
2410
fcff0f35
PD
2411 ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP);
2412 err = receive_read(ra, sizeof (ra->next_rrd->header),
2413 &ra->next_rrd->header);
47dfff3b 2414 ra->next_rrd->bytes_read = ra->bytes_read;
fcff0f35
PD
2415 if (err != 0) {
2416 kmem_free(ra->next_rrd, sizeof (*ra->next_rrd));
2417 ra->next_rrd = NULL;
37f8a883 2418 return (err);
fcff0f35
PD
2419 }
2420 if (ra->next_rrd->header.drr_type == DRR_BEGIN) {
2421 kmem_free(ra->next_rrd, sizeof (*ra->next_rrd));
2422 ra->next_rrd = NULL;
37f8a883 2423 return (SET_ERROR(EINVAL));
fcff0f35 2424 }
37f8a883
MA
2425
2426 /*
2427 * Note: checksum is of everything up to but not including the
2428 * checksum itself.
2429 */
2430 ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
2431 ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t));
fcff0f35 2432 receive_cksum(ra,
37f8a883 2433 offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum),
fcff0f35 2434 &ra->next_rrd->header);
37f8a883 2435
fcff0f35
PD
2436 cksum_orig = ra->next_rrd->header.drr_u.drr_checksum.drr_checksum;
2437 cksump = &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum;
37f8a883
MA
2438
2439 if (ra->byteswap)
fcff0f35 2440 byteswap_record(&ra->next_rrd->header);
37f8a883
MA
2441
2442 if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) &&
fcff0f35
PD
2443 !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) {
2444 kmem_free(ra->next_rrd, sizeof (*ra->next_rrd));
2445 ra->next_rrd = NULL;
37f8a883 2446 return (SET_ERROR(ECKSUM));
fcff0f35 2447 }
37f8a883 2448
fcff0f35 2449 receive_cksum(ra, sizeof (cksum_orig), &cksum_orig);
37f8a883
MA
2450
2451 return (0);
2452}
2453
e6d3a843
PD
2454static void
2455objlist_create(struct objlist *list)
2456{
2457 list_create(&list->list, sizeof (struct receive_objnode),
2458 offsetof(struct receive_objnode, node));
2459 list->last_lookup = 0;
2460}
2461
2462static void
2463objlist_destroy(struct objlist *list)
2464{
2465 struct receive_objnode *n;
2466
2467 for (n = list_remove_head(&list->list);
2468 n != NULL; n = list_remove_head(&list->list)) {
2469 kmem_free(n, sizeof (*n));
2470 }
2471 list_destroy(&list->list);
2472}
2473
2474/*
2475 * This function looks through the objlist to see if the specified object number
2476 * is contained in the objlist. In the process, it will remove all object
2477 * numbers in the list that are smaller than the specified object number. Thus,
2478 * any lookup of an object number smaller than a previously looked up object
2479 * number will always return false; therefore, all lookups should be done in
2480 * ascending order.
2481 */
2482static boolean_t
2483objlist_exists(struct objlist *list, uint64_t object)
2484{
2485 struct receive_objnode *node = list_head(&list->list);
2486 ASSERT3U(object, >=, list->last_lookup);
2487 list->last_lookup = object;
2488 while (node != NULL && node->object < object) {
2489 VERIFY3P(node, ==, list_remove_head(&list->list));
2490 kmem_free(node, sizeof (*node));
2491 node = list_head(&list->list);
2492 }
2493 return (node != NULL && node->object == object);
2494}
2495
2496/*
2497 * The objlist is a list of object numbers stored in ascending order. However,
2498 * the insertion of new object numbers does not seek out the correct location to
2499 * store a new object number; instead, it appends it to the list for simplicity.
2500 * Thus, any users must take care to only insert new object numbers in ascending
2501 * order.
2502 */
2503static void
2504objlist_insert(struct objlist *list, uint64_t object)
2505{
2506 struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP);
2507 node->object = object;
2508#ifdef ZFS_DEBUG
2509 {
2510 struct receive_objnode *last_object = list_tail(&list->list);
2511 uint64_t last_objnum = (last_object != NULL ? last_object->object : 0);
2512 ASSERT3U(node->object, >, last_objnum);
2513 }
2514#endif
2515 list_insert_tail(&list->list, node);
2516}
2517
fcff0f35
PD
2518/*
2519 * Issue the prefetch reads for any necessary indirect blocks.
2520 *
2521 * We use the object ignore list to tell us whether or not to issue prefetches
2522 * for a given object. We do this for both correctness (in case the blocksize
2523 * of an object has changed) and performance (if the object doesn't exist, don't
2524 * needlessly try to issue prefetches). We also trim the list as we go through
2525 * the stream to prevent it from growing to an unbounded size.
2526 *
2527 * The object numbers within will always be in sorted order, and any write
2528 * records we see will also be in sorted order, but they're not sorted with
2529 * respect to each other (i.e. we can get several object records before
2530 * receiving each object's write records). As a result, once we've reached a
2531 * given object number, we can safely remove any reference to lower object
2532 * numbers in the ignore list. In practice, we receive up to 32 object records
2533 * before receiving write records, so the list can have up to 32 nodes in it.
2534 */
2535/* ARGSUSED */
2536static void
2537receive_read_prefetch(struct receive_arg *ra,
2538 uint64_t object, uint64_t offset, uint64_t length)
2539{
e6d3a843 2540 if (!objlist_exists(&ra->ignore_objlist, object)) {
fcff0f35
PD
2541 dmu_prefetch(ra->os, object, 1, offset, length,
2542 ZIO_PRIORITY_SYNC_READ);
2543 }
2544}
2545
2546/*
2547 * Read records off the stream, issuing any necessary prefetches.
2548 */
37f8a883 2549static int
fcff0f35 2550receive_read_record(struct receive_arg *ra)
37f8a883
MA
2551{
2552 int err;
2553
fcff0f35 2554 switch (ra->rrd->header.drr_type) {
37f8a883
MA
2555 case DRR_OBJECT:
2556 {
fcff0f35
PD
2557 struct drr_object *drro = &ra->rrd->header.drr_u.drr_object;
2558 uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8);
2559 void *buf = kmem_zalloc(size, KM_SLEEP);
2560 dmu_object_info_t doi;
2561 err = receive_read_payload_and_next_header(ra, size, buf);
2562 if (err != 0) {
2563 kmem_free(buf, size);
37f8a883 2564 return (err);
fcff0f35
PD
2565 }
2566 err = dmu_object_info(ra->os, drro->drr_object, &doi);
2567 /*
2568 * See receive_read_prefetch for an explanation why we're
2569 * storing this object in the ignore_obj_list.
2570 */
2571 if (err == ENOENT ||
2572 (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) {
e6d3a843 2573 objlist_insert(&ra->ignore_objlist, drro->drr_object);
fcff0f35
PD
2574 err = 0;
2575 }
2576 return (err);
37f8a883
MA
2577 }
2578 case DRR_FREEOBJECTS:
2579 {
fcff0f35
PD
2580 err = receive_read_payload_and_next_header(ra, 0, NULL);
2581 return (err);
37f8a883
MA
2582 }
2583 case DRR_WRITE:
2584 {
fcff0f35 2585 struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write;
37f8a883
MA
2586 arc_buf_t *abuf = arc_loan_buf(dmu_objset_spa(ra->os),
2587 drrw->drr_length);
2588
fcff0f35 2589 err = receive_read_payload_and_next_header(ra,
37f8a883 2590 drrw->drr_length, abuf->b_data);
fcff0f35 2591 if (err != 0) {
37f8a883 2592 dmu_return_arcbuf(abuf);
fcff0f35
PD
2593 return (err);
2594 }
2595 ra->rrd->write_buf = abuf;
2596 receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset,
2597 drrw->drr_length);
37f8a883
MA
2598 return (err);
2599 }
2600 case DRR_WRITE_BYREF:
2601 {
fcff0f35
PD
2602 struct drr_write_byref *drrwb =
2603 &ra->rrd->header.drr_u.drr_write_byref;
2604 err = receive_read_payload_and_next_header(ra, 0, NULL);
2605 receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset,
2606 drrwb->drr_length);
2607 return (err);
37f8a883
MA
2608 }
2609 case DRR_WRITE_EMBEDDED:
2610 {
2611 struct drr_write_embedded *drrwe =
fcff0f35
PD
2612 &ra->rrd->header.drr_u.drr_write_embedded;
2613 uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8);
2614 void *buf = kmem_zalloc(size, KM_SLEEP);
2615
2616 err = receive_read_payload_and_next_header(ra, size, buf);
2617 if (err != 0) {
2618 kmem_free(buf, size);
37f8a883 2619 return (err);
fcff0f35
PD
2620 }
2621
2622 receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset,
2623 drrwe->drr_length);
2624 return (err);
37f8a883
MA
2625 }
2626 case DRR_FREE:
2627 {
fcff0f35
PD
2628 /*
2629 * It might be beneficial to prefetch indirect blocks here, but
2630 * we don't really have the data to decide for sure.
2631 */
2632 err = receive_read_payload_and_next_header(ra, 0, NULL);
2633 return (err);
37f8a883
MA
2634 }
2635 case DRR_END:
2636 {
fcff0f35 2637 struct drr_end *drre = &ra->rrd->header.drr_u.drr_end;
37f8a883 2638 if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum))
47dfff3b 2639 return (SET_ERROR(ECKSUM));
37f8a883
MA
2640 return (0);
2641 }
2642 case DRR_SPILL:
2643 {
fcff0f35
PD
2644 struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill;
2645 void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP);
2646 err = receive_read_payload_and_next_header(ra, drrs->drr_length,
2647 buf);
37f8a883 2648 if (err != 0)
fcff0f35
PD
2649 kmem_free(buf, drrs->drr_length);
2650 return (err);
2651 }
2652 default:
2653 return (SET_ERROR(EINVAL));
2654 }
2655}
2656
2657/*
2658 * Commit the records to the pool.
2659 */
2660static int
2661receive_process_record(struct receive_writer_arg *rwa,
2662 struct receive_record_arg *rrd)
2663{
2664 int err;
2665
47dfff3b
MA
2666 /* Processing in order, therefore bytes_read should be increasing. */
2667 ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read);
2668 rwa->bytes_read = rrd->bytes_read;
2669
fcff0f35
PD
2670 switch (rrd->header.drr_type) {
2671 case DRR_OBJECT:
2672 {
2673 struct drr_object *drro = &rrd->header.drr_u.drr_object;
2674 err = receive_object(rwa, drro, rrd->payload);
2675 kmem_free(rrd->payload, rrd->payload_size);
2676 rrd->payload = NULL;
2677 return (err);
2678 }
2679 case DRR_FREEOBJECTS:
2680 {
2681 struct drr_freeobjects *drrfo =
2682 &rrd->header.drr_u.drr_freeobjects;
2683 return (receive_freeobjects(rwa, drrfo));
2684 }
2685 case DRR_WRITE:
2686 {
2687 struct drr_write *drrw = &rrd->header.drr_u.drr_write;
2688 err = receive_write(rwa, drrw, rrd->write_buf);
2689 /* if receive_write() is successful, it consumes the arc_buf */
2690 if (err != 0)
2691 dmu_return_arcbuf(rrd->write_buf);
2692 rrd->write_buf = NULL;
2693 rrd->payload = NULL;
2694 return (err);
2695 }
2696 case DRR_WRITE_BYREF:
2697 {
2698 struct drr_write_byref *drrwbr =
2699 &rrd->header.drr_u.drr_write_byref;
2700 return (receive_write_byref(rwa, drrwbr));
2701 }
2702 case DRR_WRITE_EMBEDDED:
2703 {
2704 struct drr_write_embedded *drrwe =
2705 &rrd->header.drr_u.drr_write_embedded;
2706 err = receive_write_embedded(rwa, drrwe, rrd->payload);
2707 kmem_free(rrd->payload, rrd->payload_size);
2708 rrd->payload = NULL;
2709 return (err);
2710 }
2711 case DRR_FREE:
2712 {
2713 struct drr_free *drrf = &rrd->header.drr_u.drr_free;
2714 return (receive_free(rwa, drrf));
2715 }
2716 case DRR_SPILL:
2717 {
2718 struct drr_spill *drrs = &rrd->header.drr_u.drr_spill;
2719 err = receive_spill(rwa, drrs, rrd->payload);
2720 kmem_free(rrd->payload, rrd->payload_size);
2721 rrd->payload = NULL;
2722 return (err);
37f8a883
MA
2723 }
2724 default:
2725 return (SET_ERROR(EINVAL));
2726 }
2727}
2728
34dc7c2f 2729/*
fcff0f35
PD
2730 * dmu_recv_stream's worker thread; pull records off the queue, and then call
2731 * receive_process_record When we're done, signal the main thread and exit.
2732 */
2733static void
2734receive_writer_thread(void *arg)
2735{
2736 struct receive_writer_arg *rwa = arg;
2737 struct receive_record_arg *rrd;
3e635ac1
TC
2738 fstrans_cookie_t cookie = spl_fstrans_mark();
2739
fcff0f35
PD
2740 for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker;
2741 rrd = bqueue_dequeue(&rwa->q)) {
2742 /*
2743 * If there's an error, the main thread will stop putting things
2744 * on the queue, but we need to clear everything in it before we
2745 * can exit.
2746 */
2747 if (rwa->err == 0) {
2748 rwa->err = receive_process_record(rwa, rrd);
2749 } else if (rrd->write_buf != NULL) {
2750 dmu_return_arcbuf(rrd->write_buf);
2751 rrd->write_buf = NULL;
2752 rrd->payload = NULL;
2753 } else if (rrd->payload != NULL) {
2754 kmem_free(rrd->payload, rrd->payload_size);
2755 rrd->payload = NULL;
2756 }
2757 kmem_free(rrd, sizeof (*rrd));
2758 }
2759 kmem_free(rrd, sizeof (*rrd));
2760 mutex_enter(&rwa->mutex);
2761 rwa->done = B_TRUE;
2762 cv_signal(&rwa->cv);
2763 mutex_exit(&rwa->mutex);
3e635ac1 2764 spl_fstrans_unmark(cookie);
fcff0f35
PD
2765}
2766
47dfff3b
MA
2767static int
2768resume_check(struct receive_arg *ra, nvlist_t *begin_nvl)
2769{
2770 uint64_t val;
2771 objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset;
2772 uint64_t dsobj = dmu_objset_id(ra->os);
2773 uint64_t resume_obj, resume_off;
2774
2775 if (nvlist_lookup_uint64(begin_nvl,
2776 "resume_object", &resume_obj) != 0 ||
2777 nvlist_lookup_uint64(begin_nvl,
2778 "resume_offset", &resume_off) != 0) {
2779 return (SET_ERROR(EINVAL));
2780 }
2781 VERIFY0(zap_lookup(mos, dsobj,
2782 DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val));
2783 if (resume_obj != val)
2784 return (SET_ERROR(EINVAL));
2785 VERIFY0(zap_lookup(mos, dsobj,
2786 DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val));
2787 if (resume_off != val)
2788 return (SET_ERROR(EINVAL));
2789
2790 return (0);
2791}
2792
fcff0f35
PD
2793/*
2794 * Read in the stream's records, one by one, and apply them to the pool. There
2795 * are two threads involved; the thread that calls this function will spin up a
2796 * worker thread, read the records off the stream one by one, and issue
2797 * prefetches for any necessary indirect blocks. It will then push the records
2798 * onto an internal blocking queue. The worker thread will pull the records off
2799 * the queue, and actually write the data into the DMU. This way, the worker
2800 * thread doesn't have to wait for reads to complete, since everything it needs
2801 * (the indirect blocks) will be prefetched.
2802 *
34dc7c2f
BB
2803 * NB: callers *must* call dmu_recv_end() if this succeeds.
2804 */
2805int
572e2857
BB
2806dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
2807 int cleanup_fd, uint64_t *action_handlep)
34dc7c2f 2808{
37f8a883 2809 int err = 0;
04bc4610
NB
2810 struct receive_arg *ra;
2811 struct receive_writer_arg *rwa;
428870ff 2812 int featureflags;
47dfff3b
MA
2813 uint32_t payloadlen;
2814 void *payload;
2815 nvlist_t *begin_nvl = NULL;
34dc7c2f 2816
04bc4610
NB
2817 ra = kmem_zalloc(sizeof (*ra), KM_SLEEP);
2818 rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP);
2819
2820 ra->byteswap = drc->drc_byteswap;
2821 ra->cksum = drc->drc_cksum;
2822 ra->vp = vp;
2823 ra->voff = *voffp;
47dfff3b
MA
2824
2825 if (dsl_dataset_is_zapified(drc->drc_ds)) {
2826 (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset,
2827 drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES,
2828 sizeof (ra->bytes_read), 1, &ra->bytes_read);
2829 }
2830
e6d3a843 2831 objlist_create(&ra->ignore_objlist);
34dc7c2f
BB
2832
2833 /* these were verified in dmu_recv_begin */
13fe0198 2834 ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==,
428870ff 2835 DMU_SUBSTREAM);
13fe0198 2836 ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES);
34dc7c2f
BB
2837
2838 /*
2839 * Open the objset we are modifying.
2840 */
04bc4610 2841 VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra->os));
34dc7c2f 2842
d683ddbb 2843 ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT);
34dc7c2f 2844
428870ff
BB
2845 featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
2846
2847 /* if this stream is dedup'ed, set up the avl tree for guid mapping */
2848 if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
572e2857
BB
2849 minor_t minor;
2850
2851 if (cleanup_fd == -1) {
04bc4610 2852 ra->err = SET_ERROR(EBADF);
572e2857
BB
2853 goto out;
2854 }
04bc4610
NB
2855 ra->err = zfs_onexit_fd_hold(cleanup_fd, &minor);
2856 if (ra->err != 0) {
572e2857
BB
2857 cleanup_fd = -1;
2858 goto out;
2859 }
2860
2861 if (*action_handlep == 0) {
04bc4610 2862 rwa->guid_to_ds_map =
572e2857 2863 kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
04bc4610 2864 avl_create(rwa->guid_to_ds_map, guid_compare,
572e2857
BB
2865 sizeof (guid_map_entry_t),
2866 offsetof(guid_map_entry_t, avlnode));
37f8a883 2867 err = zfs_onexit_add_cb(minor,
04bc4610 2868 free_guid_map_onexit, rwa->guid_to_ds_map,
572e2857 2869 action_handlep);
04bc4610 2870 if (ra->err != 0)
572e2857
BB
2871 goto out;
2872 } else {
37f8a883 2873 err = zfs_onexit_cb_data(minor, *action_handlep,
04bc4610
NB
2874 (void **)&rwa->guid_to_ds_map);
2875 if (ra->err != 0)
572e2857
BB
2876 goto out;
2877 }
8d35c149 2878
04bc4610 2879 drc->drc_guid_to_ds_map = rwa->guid_to_ds_map;
428870ff
BB
2880 }
2881
47dfff3b
MA
2882 payloadlen = drc->drc_drr_begin->drr_payloadlen;
2883 payload = NULL;
2884 if (payloadlen != 0)
2885 payload = kmem_alloc(payloadlen, KM_SLEEP);
2886
2887 err = receive_read_payload_and_next_header(ra, payloadlen, payload);
2888 if (err != 0) {
2889 if (payloadlen != 0)
2890 kmem_free(payload, payloadlen);
37f8a883 2891 goto out;
47dfff3b
MA
2892 }
2893 if (payloadlen != 0) {
2894 err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP);
2895 kmem_free(payload, payloadlen);
2896 if (err != 0)
2897 goto out;
2898 }
2899
2900 if (featureflags & DMU_BACKUP_FEATURE_RESUMING) {
2901 err = resume_check(ra, begin_nvl);
2902 if (err != 0)
2903 goto out;
2904 }
37f8a883 2905
04bc4610 2906 (void) bqueue_init(&rwa->q, zfs_recv_queue_length,
fcff0f35 2907 offsetof(struct receive_record_arg, node));
04bc4610
NB
2908 cv_init(&rwa->cv, NULL, CV_DEFAULT, NULL);
2909 mutex_init(&rwa->mutex, NULL, MUTEX_DEFAULT, NULL);
2910 rwa->os = ra->os;
2911 rwa->byteswap = drc->drc_byteswap;
47dfff3b 2912 rwa->resumable = drc->drc_resumable;
fcff0f35 2913
04bc4610 2914 (void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc,
fcff0f35
PD
2915 TS_RUN, minclsyspri);
2916 /*
04bc4610 2917 * We're reading rwa->err without locks, which is safe since we are the
fcff0f35
PD
2918 * only reader, and the worker thread is the only writer. It's ok if we
2919 * miss a write for an iteration or two of the loop, since the writer
2920 * thread will keep freeing records we send it until we send it an eos
2921 * marker.
2922 *
04bc4610 2923 * We can leave this loop in 3 ways: First, if rwa->err is
fcff0f35
PD
2924 * non-zero. In that case, the writer thread will free the rrd we just
2925 * pushed. Second, if we're interrupted; in that case, either it's the
47dfff3b 2926 * first loop and ra->rrd was never allocated, or it's later and ra->rrd
fcff0f35
PD
2927 * has been handed off to the writer thread who will free it. Finally,
2928 * if receive_read_record fails or we're at the end of the stream, then
04bc4610 2929 * we free ra->rrd and exit.
fcff0f35 2930 */
04bc4610 2931 while (rwa->err == 0) {
34dc7c2f 2932 if (issig(JUSTLOOKING) && issig(FORREAL)) {
37f8a883
MA
2933 err = SET_ERROR(EINTR);
2934 break;
34dc7c2f
BB
2935 }
2936
04bc4610
NB
2937 ASSERT3P(ra->rrd, ==, NULL);
2938 ra->rrd = ra->next_rrd;
2939 ra->next_rrd = NULL;
2940 /* Allocates and loads header into ra->next_rrd */
2941 err = receive_read_record(ra);
34dc7c2f 2942
04bc4610
NB
2943 if (ra->rrd->header.drr_type == DRR_END || err != 0) {
2944 kmem_free(ra->rrd, sizeof (*ra->rrd));
2945 ra->rrd = NULL;
428870ff 2946 break;
fcff0f35
PD
2947 }
2948
04bc4610
NB
2949 bqueue_enqueue(&rwa->q, ra->rrd,
2950 sizeof (struct receive_record_arg) + ra->rrd->payload_size);
2951 ra->rrd = NULL;
fcff0f35 2952 }
04bc4610
NB
2953 if (ra->next_rrd == NULL)
2954 ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP);
2955 ra->next_rrd->eos_marker = B_TRUE;
2956 bqueue_enqueue(&rwa->q, ra->next_rrd, 1);
fcff0f35 2957
04bc4610
NB
2958 mutex_enter(&rwa->mutex);
2959 while (!rwa->done) {
2960 cv_wait(&rwa->cv, &rwa->mutex);
34dc7c2f 2961 }
04bc4610 2962 mutex_exit(&rwa->mutex);
fcff0f35 2963
04bc4610
NB
2964 cv_destroy(&rwa->cv);
2965 mutex_destroy(&rwa->mutex);
2966 bqueue_destroy(&rwa->q);
fcff0f35 2967 if (err == 0)
04bc4610 2968 err = rwa->err;
34dc7c2f
BB
2969
2970out:
47dfff3b 2971 nvlist_free(begin_nvl);
572e2857
BB
2972 if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
2973 zfs_onexit_fd_rele(cleanup_fd);
2974
37f8a883 2975 if (err != 0) {
34dc7c2f 2976 /*
47dfff3b
MA
2977 * Clean up references. If receive is not resumable,
2978 * destroy what we created, so we don't leave it in
2979 * the inconsistent state.
34dc7c2f 2980 */
13fe0198 2981 dmu_recv_cleanup_ds(drc);
34dc7c2f
BB
2982 }
2983
04bc4610 2984 *voffp = ra->voff;
e6d3a843 2985 objlist_destroy(&ra->ignore_objlist);
04bc4610
NB
2986 kmem_free(ra, sizeof (*ra));
2987 kmem_free(rwa, sizeof (*rwa));
37f8a883 2988 return (err);
34dc7c2f
BB
2989}
2990
34dc7c2f 2991static int
13fe0198 2992dmu_recv_end_check(void *arg, dmu_tx_t *tx)
34dc7c2f 2993{
13fe0198
MA
2994 dmu_recv_cookie_t *drc = arg;
2995 dsl_pool_t *dp = dmu_tx_pool(tx);
2996 int error;
2997
2998 ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag);
2999
3000 if (!drc->drc_newfs) {
3001 dsl_dataset_t *origin_head;
3002
3003 error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head);
3004 if (error != 0)
3005 return (error);
19580676
MA
3006 if (drc->drc_force) {
3007 /*
3008 * We will destroy any snapshots in tofs (i.e. before
3009 * origin_head) that are after the origin (which is
3010 * the snap before drc_ds, because drc_ds can not
3011 * have any snaps of its own).
3012 */
d683ddbb
JG
3013 uint64_t obj;
3014
3015 obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj;
3016 while (obj !=
3017 dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) {
19580676
MA
3018 dsl_dataset_t *snap;
3019 error = dsl_dataset_hold_obj(dp, obj, FTAG,
3020 &snap);
3021 if (error != 0)
b6640117 3022 break;
19580676
MA
3023 if (snap->ds_dir != origin_head->ds_dir)
3024 error = SET_ERROR(EINVAL);
3025 if (error == 0) {
3026 error = dsl_destroy_snapshot_check_impl(
3027 snap, B_FALSE);
3028 }
d683ddbb 3029 obj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
19580676
MA
3030 dsl_dataset_rele(snap, FTAG);
3031 if (error != 0)
b6640117
AG
3032 break;
3033 }
3034 if (error != 0) {
3035 dsl_dataset_rele(origin_head, FTAG);
3036 return (error);
19580676
MA
3037 }
3038 }
13fe0198 3039 error = dsl_dataset_clone_swap_check_impl(drc->drc_ds,
831baf06 3040 origin_head, drc->drc_force, drc->drc_owner, tx);
13fe0198
MA
3041 if (error != 0) {
3042 dsl_dataset_rele(origin_head, FTAG);
3043 return (error);
3044 }
3045 error = dsl_dataset_snapshot_check_impl(origin_head,
788eb90c 3046 drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred);
13fe0198
MA
3047 dsl_dataset_rele(origin_head, FTAG);
3048 if (error != 0)
3049 return (error);
34dc7c2f 3050
13fe0198
MA
3051 error = dsl_destroy_head_check_impl(drc->drc_ds, 1);
3052 } else {
3053 error = dsl_dataset_snapshot_check_impl(drc->drc_ds,
788eb90c 3054 drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred);
13fe0198
MA
3055 }
3056 return (error);
34dc7c2f
BB
3057}
3058
3059static void
13fe0198 3060dmu_recv_end_sync(void *arg, dmu_tx_t *tx)
34dc7c2f 3061{
13fe0198
MA
3062 dmu_recv_cookie_t *drc = arg;
3063 dsl_pool_t *dp = dmu_tx_pool(tx);
3064
3065 spa_history_log_internal_ds(drc->drc_ds, "finish receiving",
3066 tx, "snap=%s", drc->drc_tosnap);
3067
3068 if (!drc->drc_newfs) {
3069 dsl_dataset_t *origin_head;
3070
3071 VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG,
3072 &origin_head));
19580676
MA
3073
3074 if (drc->drc_force) {
3075 /*
3076 * Destroy any snapshots of drc_tofs (origin_head)
3077 * after the origin (the snap before drc_ds).
3078 */
d683ddbb
JG
3079 uint64_t obj;
3080
3081 obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj;
3082 while (obj !=
3083 dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) {
19580676
MA
3084 dsl_dataset_t *snap;
3085 VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG,
3086 &snap));
3087 ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir);
d683ddbb 3088 obj = dsl_dataset_phys(snap)->ds_prev_snap_obj;
19580676
MA
3089 dsl_destroy_snapshot_sync_impl(snap,
3090 B_FALSE, tx);
3091 dsl_dataset_rele(snap, FTAG);
3092 }
3093 }
3094 VERIFY3P(drc->drc_ds->ds_prev, ==,
3095 origin_head->ds_prev);
3096
13fe0198
MA
3097 dsl_dataset_clone_swap_sync_impl(drc->drc_ds,
3098 origin_head, tx);
3099 dsl_dataset_snapshot_sync_impl(origin_head,
3100 drc->drc_tosnap, tx);
3101
3102 /* set snapshot's creation time and guid */
3103 dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx);
d683ddbb 3104 dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time =
13fe0198 3105 drc->drc_drrb->drr_creation_time;
d683ddbb 3106 dsl_dataset_phys(origin_head->ds_prev)->ds_guid =
13fe0198 3107 drc->drc_drrb->drr_toguid;
d683ddbb 3108 dsl_dataset_phys(origin_head->ds_prev)->ds_flags &=
13fe0198
MA
3109 ~DS_FLAG_INCONSISTENT;
3110
3111 dmu_buf_will_dirty(origin_head->ds_dbuf, tx);
d683ddbb
JG
3112 dsl_dataset_phys(origin_head)->ds_flags &=
3113 ~DS_FLAG_INCONSISTENT;
13fe0198
MA
3114
3115 dsl_dataset_rele(origin_head, FTAG);
3116 dsl_destroy_head_sync_impl(drc->drc_ds, tx);
831baf06
KW
3117
3118 if (drc->drc_owner != NULL)
3119 VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner);
13fe0198
MA
3120 } else {
3121 dsl_dataset_t *ds = drc->drc_ds;
34dc7c2f 3122
13fe0198 3123 dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx);
34dc7c2f 3124
13fe0198
MA
3125 /* set snapshot's creation time and guid */
3126 dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
d683ddbb 3127 dsl_dataset_phys(ds->ds_prev)->ds_creation_time =
13fe0198 3128 drc->drc_drrb->drr_creation_time;
d683ddbb
JG
3129 dsl_dataset_phys(ds->ds_prev)->ds_guid =
3130 drc->drc_drrb->drr_toguid;
3131 dsl_dataset_phys(ds->ds_prev)->ds_flags &=
3132 ~DS_FLAG_INCONSISTENT;
34dc7c2f 3133
13fe0198 3134 dmu_buf_will_dirty(ds->ds_dbuf, tx);
d683ddbb 3135 dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT;
47dfff3b
MA
3136 if (dsl_dataset_has_resume_receive_state(ds)) {
3137 (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
3138 DS_FIELD_RESUME_FROMGUID, tx);
3139 (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
3140 DS_FIELD_RESUME_OBJECT, tx);
3141 (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
3142 DS_FIELD_RESUME_OFFSET, tx);
3143 (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
3144 DS_FIELD_RESUME_BYTES, tx);
3145 (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
3146 DS_FIELD_RESUME_TOGUID, tx);
3147 (void) zap_remove(dp->dp_meta_objset, ds->ds_object,
3148 DS_FIELD_RESUME_TONAME, tx);
3149 }
13fe0198 3150 }
d683ddbb 3151 drc->drc_newsnapobj = dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj;
a0bd735a 3152 zvol_create_minors(dp->dp_spa, drc->drc_tofs, B_TRUE);
13fe0198
MA
3153 /*
3154 * Release the hold from dmu_recv_begin. This must be done before
3155 * we return to open context, so that when we free the dataset's dnode,
3156 * we can evict its bonus buffer.
3157 */
3158 dsl_dataset_disown(drc->drc_ds, dmu_recv_tag);
3159 drc->drc_ds = NULL;
34dc7c2f
BB
3160}
3161
8d35c149 3162static int
13fe0198 3163add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj)
8d35c149 3164{
13fe0198 3165 dsl_pool_t *dp;
8d35c149
AS
3166 dsl_dataset_t *snapds;
3167 guid_map_entry_t *gmep;
3168 int err;
3169
3170 ASSERT(guid_map != NULL);
3171
13fe0198
MA
3172 err = dsl_pool_hold(name, FTAG, &dp);
3173 if (err != 0)
3174 return (err);
7ec09286
MA
3175 gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP);
3176 err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds);
8d35c149 3177 if (err == 0) {
d683ddbb 3178 gmep->guid = dsl_dataset_phys(snapds)->ds_guid;
8d35c149
AS
3179 gmep->gme_ds = snapds;
3180 avl_add(guid_map, gmep);
13fe0198 3181 dsl_dataset_long_hold(snapds, gmep);
7ec09286
MA
3182 } else {
3183 kmem_free(gmep, sizeof (*gmep));
8d35c149
AS
3184 }
3185
13fe0198 3186 dsl_pool_rele(dp, FTAG);
8d35c149
AS
3187 return (err);
3188}
3189
13fe0198
MA
3190static int dmu_recv_end_modified_blocks = 3;
3191
428870ff
BB
3192static int
3193dmu_recv_existing_end(dmu_recv_cookie_t *drc)
34dc7c2f 3194{
13fe0198 3195 int error;
34dc7c2f 3196
13fe0198 3197#ifdef _KERNEL
13fe0198
MA
3198 /*
3199 * We will be destroying the ds; make sure its origin is unmounted if
3200 * necessary.
3201 */
eca7b760 3202 char name[ZFS_MAX_DATASET_NAME_LEN];
13fe0198
MA
3203 dsl_dataset_name(drc->drc_ds, name);
3204 zfs_destroy_unmount_origin(name);
13fe0198 3205#endif
34dc7c2f 3206
13fe0198
MA
3207 error = dsl_sync_task(drc->drc_tofs,
3208 dmu_recv_end_check, dmu_recv_end_sync, drc,
3d45fdd6 3209 dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL);
13fe0198
MA
3210
3211 if (error != 0)
3212 dmu_recv_cleanup_ds(drc);
3213 return (error);
34dc7c2f 3214}
428870ff
BB
3215
3216static int
3217dmu_recv_new_end(dmu_recv_cookie_t *drc)
3218{
13fe0198 3219 int error;
428870ff 3220
13fe0198
MA
3221 error = dsl_sync_task(drc->drc_tofs,
3222 dmu_recv_end_check, dmu_recv_end_sync, drc,
3d45fdd6 3223 dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL);
428870ff 3224
13fe0198
MA
3225 if (error != 0) {
3226 dmu_recv_cleanup_ds(drc);
3227 } else if (drc->drc_guid_to_ds_map != NULL) {
3228 (void) add_ds_to_guidmap(drc->drc_tofs,
3229 drc->drc_guid_to_ds_map,
3230 drc->drc_newsnapobj);
428870ff 3231 }
13fe0198 3232 return (error);
428870ff
BB
3233}
3234
3235int
831baf06 3236dmu_recv_end(dmu_recv_cookie_t *drc, void *owner)
428870ff 3237{
831baf06
KW
3238 drc->drc_owner = owner;
3239
13fe0198 3240 if (drc->drc_newfs)
428870ff 3241 return (dmu_recv_new_end(drc));
13fe0198
MA
3242 else
3243 return (dmu_recv_existing_end(drc));
428870ff 3244}
ea97f8ce
MA
3245
3246/*
3247 * Return TRUE if this objset is currently being received into.
3248 */
3249boolean_t
3250dmu_objset_is_receiving(objset_t *os)
3251{
3252 return (os->os_dsl_dataset != NULL &&
3253 os->os_dsl_dataset->ds_owner == dmu_recv_tag);
3254}
fd8febbd
TF
3255
3256#if defined(_KERNEL)
3257module_param(zfs_send_corrupt_data, int, 0644);
3258MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data");
3259#endif