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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 */ |
63 | int zfs_send_corrupt_data = B_FALSE; | |
fcff0f35 PD |
64 | int zfs_send_queue_length = 16 * 1024 * 1024; |
65 | int zfs_recv_queue_length = 16 * 1024 * 1024; | |
b607405f AS |
66 | /* Set this tunable to FALSE to disable setting of DRR_FLAG_FREERECORDS */ |
67 | int zfs_send_set_freerecords_bit = B_TRUE; | |
330d06f9 | 68 | |
34dc7c2f | 69 | static char *dmu_recv_tag = "dmu_recv_tag"; |
47dfff3b | 70 | const 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 |
76 | static void byteswap_record(dmu_replay_record_t *drr); |
77 | ||
fcff0f35 PD |
78 | struct 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 | ||
88 | struct 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 |
97 | typedef struct dump_bytes_io { |
98 | dmu_sendarg_t *dbi_dsp; | |
99 | void *dbi_buf; | |
100 | int dbi_len; | |
101 | } dump_bytes_io_t; | |
102 | ||
103 | static void | |
b58986ee | 104 | dump_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 | ||
134 | static int | |
135 | dump_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 | */ | |
164 | static int | |
165 | dump_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)); | |
a6255b7f | 169 | (void) fletcher_4_incremental_native(dsp->dsa_drr, |
37f8a883 MA |
170 | offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), |
171 | &dsp->dsa_zc); | |
51907a31 K |
172 | if (dsp->dsa_drr->drr_type == DRR_BEGIN) { |
173 | dsp->dsa_sent_begin = B_TRUE; | |
174 | } else { | |
37f8a883 MA |
175 | ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u. |
176 | drr_checksum.drr_checksum)); | |
177 | dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc; | |
178 | } | |
51907a31 K |
179 | if (dsp->dsa_drr->drr_type == DRR_END) { |
180 | dsp->dsa_sent_end = B_TRUE; | |
181 | } | |
a6255b7f | 182 | (void) fletcher_4_incremental_native(&dsp->dsa_drr-> |
37f8a883 MA |
183 | drr_u.drr_checksum.drr_checksum, |
184 | sizeof (zio_cksum_t), &dsp->dsa_zc); | |
185 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) | |
186 | return (SET_ERROR(EINTR)); | |
187 | if (payload_len != 0) { | |
a6255b7f | 188 | (void) fletcher_4_incremental_native(payload, payload_len, |
37f8a883 MA |
189 | &dsp->dsa_zc); |
190 | if (dump_bytes(dsp, payload, payload_len) != 0) | |
191 | return (SET_ERROR(EINTR)); | |
192 | } | |
193 | return (0); | |
194 | } | |
195 | ||
e6d3a843 PD |
196 | /* |
197 | * Fill in the drr_free struct, or perform aggregation if the previous record is | |
198 | * also a free record, and the two are adjacent. | |
199 | * | |
200 | * Note that we send free records even for a full send, because we want to be | |
201 | * able to receive a full send as a clone, which requires a list of all the free | |
202 | * and freeobject records that were generated on the source. | |
203 | */ | |
34dc7c2f | 204 | static int |
37abac6d | 205 | dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, |
34dc7c2f BB |
206 | uint64_t length) |
207 | { | |
37abac6d | 208 | struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); |
428870ff | 209 | |
ea97f8ce MA |
210 | /* |
211 | * When we receive a free record, dbuf_free_range() assumes | |
212 | * that the receiving system doesn't have any dbufs in the range | |
213 | * being freed. This is always true because there is a one-record | |
214 | * constraint: we only send one WRITE record for any given | |
47dfff3b | 215 | * object,offset. We know that the one-record constraint is |
ea97f8ce MA |
216 | * true because we always send data in increasing order by |
217 | * object,offset. | |
218 | * | |
219 | * If the increasing-order constraint ever changes, we should find | |
220 | * another way to assert that the one-record constraint is still | |
221 | * satisfied. | |
222 | */ | |
223 | ASSERT(object > dsp->dsa_last_data_object || | |
224 | (object == dsp->dsa_last_data_object && | |
225 | offset > dsp->dsa_last_data_offset)); | |
226 | ||
c578f007 SK |
227 | if (length != -1ULL && offset + length < offset) |
228 | length = -1ULL; | |
229 | ||
428870ff BB |
230 | /* |
231 | * If there is a pending op, but it's not PENDING_FREE, push it out, | |
232 | * since free block aggregation can only be done for blocks of the | |
233 | * same type (i.e., DRR_FREE records can only be aggregated with | |
234 | * other DRR_FREE records. DRR_FREEOBJECTS records can only be | |
235 | * aggregated with other DRR_FREEOBJECTS records. | |
236 | */ | |
37abac6d BP |
237 | if (dsp->dsa_pending_op != PENDING_NONE && |
238 | dsp->dsa_pending_op != PENDING_FREE) { | |
37f8a883 | 239 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 240 | return (SET_ERROR(EINTR)); |
37abac6d | 241 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
242 | } |
243 | ||
37abac6d | 244 | if (dsp->dsa_pending_op == PENDING_FREE) { |
428870ff BB |
245 | /* |
246 | * There should never be a PENDING_FREE if length is -1 | |
247 | * (because dump_dnode is the only place where this | |
248 | * function is called with a -1, and only after flushing | |
249 | * any pending record). | |
250 | */ | |
251 | ASSERT(length != -1ULL); | |
252 | /* | |
253 | * Check to see whether this free block can be aggregated | |
254 | * with pending one. | |
255 | */ | |
256 | if (drrf->drr_object == object && drrf->drr_offset + | |
257 | drrf->drr_length == offset) { | |
258 | drrf->drr_length += length; | |
259 | return (0); | |
260 | } else { | |
261 | /* not a continuation. Push out pending record */ | |
37f8a883 | 262 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 263 | return (SET_ERROR(EINTR)); |
37abac6d | 264 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
265 | } |
266 | } | |
267 | /* create a FREE record and make it pending */ | |
37abac6d BP |
268 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
269 | dsp->dsa_drr->drr_type = DRR_FREE; | |
428870ff BB |
270 | drrf->drr_object = object; |
271 | drrf->drr_offset = offset; | |
272 | drrf->drr_length = length; | |
37abac6d | 273 | drrf->drr_toguid = dsp->dsa_toguid; |
428870ff | 274 | if (length == -1ULL) { |
37f8a883 | 275 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 276 | return (SET_ERROR(EINTR)); |
428870ff | 277 | } else { |
37abac6d | 278 | dsp->dsa_pending_op = PENDING_FREE; |
428870ff | 279 | } |
34dc7c2f | 280 | |
34dc7c2f BB |
281 | return (0); |
282 | } | |
283 | ||
284 | static int | |
9b67f605 | 285 | dump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, |
2aa34383 DK |
286 | uint64_t object, uint64_t offset, int lsize, int psize, const blkptr_t *bp, |
287 | void *data) | |
34dc7c2f | 288 | { |
2aa34383 | 289 | uint64_t payload_size; |
37abac6d | 290 | struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); |
428870ff | 291 | |
ea97f8ce MA |
292 | /* |
293 | * We send data in increasing object, offset order. | |
294 | * See comment in dump_free() for details. | |
295 | */ | |
296 | ASSERT(object > dsp->dsa_last_data_object || | |
297 | (object == dsp->dsa_last_data_object && | |
298 | offset > dsp->dsa_last_data_offset)); | |
299 | dsp->dsa_last_data_object = object; | |
2aa34383 | 300 | dsp->dsa_last_data_offset = offset + lsize - 1; |
428870ff BB |
301 | |
302 | /* | |
303 | * If there is any kind of pending aggregation (currently either | |
304 | * a grouping of free objects or free blocks), push it out to | |
305 | * the stream, since aggregation can't be done across operations | |
306 | * of different types. | |
307 | */ | |
37abac6d | 308 | if (dsp->dsa_pending_op != PENDING_NONE) { |
37f8a883 | 309 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 310 | return (SET_ERROR(EINTR)); |
37abac6d | 311 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 312 | } |
37f8a883 | 313 | /* write a WRITE record */ |
37abac6d BP |
314 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
315 | dsp->dsa_drr->drr_type = DRR_WRITE; | |
428870ff BB |
316 | drrw->drr_object = object; |
317 | drrw->drr_type = type; | |
318 | drrw->drr_offset = offset; | |
37abac6d | 319 | drrw->drr_toguid = dsp->dsa_toguid; |
2aa34383 DK |
320 | drrw->drr_logical_size = lsize; |
321 | ||
322 | /* only set the compression fields if the buf is compressed */ | |
323 | if (lsize != psize) { | |
324 | ASSERT(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_COMPRESSED); | |
325 | ASSERT(!BP_IS_EMBEDDED(bp)); | |
326 | ASSERT(!BP_SHOULD_BYTESWAP(bp)); | |
327 | ASSERT(!DMU_OT_IS_METADATA(BP_GET_TYPE(bp))); | |
328 | ASSERT3U(BP_GET_COMPRESS(bp), !=, ZIO_COMPRESS_OFF); | |
329 | ASSERT3S(psize, >, 0); | |
330 | ASSERT3S(lsize, >=, psize); | |
331 | ||
332 | drrw->drr_compressiontype = BP_GET_COMPRESS(bp); | |
333 | drrw->drr_compressed_size = psize; | |
334 | payload_size = drrw->drr_compressed_size; | |
335 | } else { | |
336 | payload_size = drrw->drr_logical_size; | |
337 | } | |
338 | ||
f1512ee6 | 339 | if (bp == NULL || BP_IS_EMBEDDED(bp)) { |
9b67f605 | 340 | /* |
f1512ee6 MA |
341 | * There's no pre-computed checksum for partial-block |
342 | * writes or embedded BP's, so (like | |
343 | * fletcher4-checkummed blocks) userland will have to | |
344 | * compute a dedup-capable checksum itself. | |
9b67f605 MA |
345 | */ |
346 | drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; | |
347 | } else { | |
348 | drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); | |
3c67d83a TH |
349 | if (zio_checksum_table[drrw->drr_checksumtype].ci_flags & |
350 | ZCHECKSUM_FLAG_DEDUP) | |
9b67f605 MA |
351 | drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; |
352 | DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); | |
353 | DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); | |
354 | DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); | |
355 | drrw->drr_key.ddk_cksum = bp->blk_cksum; | |
356 | } | |
428870ff | 357 | |
2aa34383 | 358 | if (dump_record(dsp, data, payload_size) != 0) |
2e528b49 | 359 | return (SET_ERROR(EINTR)); |
428870ff BB |
360 | return (0); |
361 | } | |
362 | ||
9b67f605 MA |
363 | static int |
364 | dump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, | |
365 | int blksz, const blkptr_t *bp) | |
366 | { | |
367 | char buf[BPE_PAYLOAD_SIZE]; | |
368 | struct drr_write_embedded *drrw = | |
369 | &(dsp->dsa_drr->drr_u.drr_write_embedded); | |
370 | ||
371 | if (dsp->dsa_pending_op != PENDING_NONE) { | |
37f8a883 | 372 | if (dump_record(dsp, NULL, 0) != 0) |
9b67f605 MA |
373 | return (EINTR); |
374 | dsp->dsa_pending_op = PENDING_NONE; | |
375 | } | |
376 | ||
377 | ASSERT(BP_IS_EMBEDDED(bp)); | |
378 | ||
379 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); | |
380 | dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; | |
381 | drrw->drr_object = object; | |
382 | drrw->drr_offset = offset; | |
383 | drrw->drr_length = blksz; | |
384 | drrw->drr_toguid = dsp->dsa_toguid; | |
385 | drrw->drr_compression = BP_GET_COMPRESS(bp); | |
386 | drrw->drr_etype = BPE_GET_ETYPE(bp); | |
387 | drrw->drr_lsize = BPE_GET_LSIZE(bp); | |
388 | drrw->drr_psize = BPE_GET_PSIZE(bp); | |
389 | ||
390 | decode_embedded_bp_compressed(bp, buf); | |
391 | ||
37f8a883 | 392 | if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) |
9b67f605 MA |
393 | return (EINTR); |
394 | return (0); | |
395 | } | |
396 | ||
428870ff | 397 | static int |
37abac6d | 398 | dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) |
428870ff | 399 | { |
37abac6d | 400 | struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); |
428870ff | 401 | |
37abac6d | 402 | if (dsp->dsa_pending_op != PENDING_NONE) { |
37f8a883 | 403 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 404 | return (SET_ERROR(EINTR)); |
37abac6d | 405 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
406 | } |
407 | ||
408 | /* write a SPILL record */ | |
37abac6d BP |
409 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
410 | dsp->dsa_drr->drr_type = DRR_SPILL; | |
428870ff BB |
411 | drrs->drr_object = object; |
412 | drrs->drr_length = blksz; | |
37abac6d | 413 | drrs->drr_toguid = dsp->dsa_toguid; |
34dc7c2f | 414 | |
37f8a883 | 415 | if (dump_record(dsp, data, blksz) != 0) |
2e528b49 | 416 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
417 | return (0); |
418 | } | |
419 | ||
420 | static int | |
37abac6d | 421 | dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) |
34dc7c2f | 422 | { |
37abac6d | 423 | struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); |
428870ff BB |
424 | |
425 | /* | |
426 | * If there is a pending op, but it's not PENDING_FREEOBJECTS, | |
427 | * push it out, since free block aggregation can only be done for | |
428 | * blocks of the same type (i.e., DRR_FREE records can only be | |
429 | * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records | |
430 | * can only be aggregated with other DRR_FREEOBJECTS records. | |
431 | */ | |
37abac6d BP |
432 | if (dsp->dsa_pending_op != PENDING_NONE && |
433 | dsp->dsa_pending_op != PENDING_FREEOBJECTS) { | |
37f8a883 | 434 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 435 | return (SET_ERROR(EINTR)); |
37abac6d | 436 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 437 | } |
37abac6d | 438 | if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { |
428870ff BB |
439 | /* |
440 | * See whether this free object array can be aggregated | |
441 | * with pending one | |
442 | */ | |
443 | if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { | |
444 | drrfo->drr_numobjs += numobjs; | |
445 | return (0); | |
446 | } else { | |
447 | /* can't be aggregated. Push out pending record */ | |
37f8a883 | 448 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 449 | return (SET_ERROR(EINTR)); |
37abac6d | 450 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
451 | } |
452 | } | |
453 | ||
34dc7c2f | 454 | /* write a FREEOBJECTS record */ |
37abac6d BP |
455 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
456 | dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; | |
428870ff BB |
457 | drrfo->drr_firstobj = firstobj; |
458 | drrfo->drr_numobjs = numobjs; | |
37abac6d | 459 | drrfo->drr_toguid = dsp->dsa_toguid; |
428870ff | 460 | |
37abac6d | 461 | dsp->dsa_pending_op = PENDING_FREEOBJECTS; |
34dc7c2f | 462 | |
34dc7c2f BB |
463 | return (0); |
464 | } | |
465 | ||
466 | static int | |
37abac6d | 467 | dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) |
34dc7c2f | 468 | { |
37abac6d | 469 | struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); |
428870ff | 470 | |
47dfff3b MA |
471 | if (object < dsp->dsa_resume_object) { |
472 | /* | |
473 | * Note: when resuming, we will visit all the dnodes in | |
474 | * the block of dnodes that we are resuming from. In | |
475 | * this case it's unnecessary to send the dnodes prior to | |
476 | * the one we are resuming from. We should be at most one | |
477 | * block's worth of dnodes behind the resume point. | |
478 | */ | |
479 | ASSERT3U(dsp->dsa_resume_object - object, <, | |
480 | 1 << (DNODE_BLOCK_SHIFT - DNODE_SHIFT)); | |
481 | return (0); | |
482 | } | |
483 | ||
34dc7c2f | 484 | if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) |
37abac6d | 485 | return (dump_freeobjects(dsp, object, 1)); |
34dc7c2f | 486 | |
37abac6d | 487 | if (dsp->dsa_pending_op != PENDING_NONE) { |
37f8a883 | 488 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 489 | return (SET_ERROR(EINTR)); |
37abac6d | 490 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
491 | } |
492 | ||
34dc7c2f | 493 | /* write an OBJECT record */ |
37abac6d BP |
494 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
495 | dsp->dsa_drr->drr_type = DRR_OBJECT; | |
428870ff BB |
496 | drro->drr_object = object; |
497 | drro->drr_type = dnp->dn_type; | |
498 | drro->drr_bonustype = dnp->dn_bonustype; | |
499 | drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
500 | drro->drr_bonuslen = dnp->dn_bonuslen; | |
50c957f7 | 501 | drro->drr_dn_slots = dnp->dn_extra_slots + 1; |
428870ff BB |
502 | drro->drr_checksumtype = dnp->dn_checksum; |
503 | drro->drr_compress = dnp->dn_compress; | |
37abac6d | 504 | drro->drr_toguid = dsp->dsa_toguid; |
428870ff | 505 | |
f1512ee6 MA |
506 | if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && |
507 | drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) | |
508 | drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; | |
509 | ||
37f8a883 MA |
510 | if (dump_record(dsp, DN_BONUS(dnp), |
511 | P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) { | |
2e528b49 | 512 | return (SET_ERROR(EINTR)); |
37f8a883 | 513 | } |
34dc7c2f | 514 | |
ea97f8ce | 515 | /* Free anything past the end of the file. */ |
37abac6d | 516 | if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * |
ea97f8ce | 517 | (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) |
2e528b49 | 518 | return (SET_ERROR(EINTR)); |
13fe0198 | 519 | if (dsp->dsa_err != 0) |
2e528b49 | 520 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
521 | return (0); |
522 | } | |
523 | ||
9b67f605 MA |
524 | static boolean_t |
525 | backup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) | |
526 | { | |
527 | if (!BP_IS_EMBEDDED(bp)) | |
528 | return (B_FALSE); | |
529 | ||
530 | /* | |
531 | * Compression function must be legacy, or explicitly enabled. | |
532 | */ | |
533 | if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && | |
2aa34383 | 534 | !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LZ4))) |
9b67f605 MA |
535 | return (B_FALSE); |
536 | ||
537 | /* | |
538 | * Embed type must be explicitly enabled. | |
539 | */ | |
540 | switch (BPE_GET_ETYPE(bp)) { | |
541 | case BP_EMBEDDED_TYPE_DATA: | |
542 | if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) | |
543 | return (B_TRUE); | |
544 | break; | |
545 | default: | |
546 | return (B_FALSE); | |
547 | } | |
548 | return (B_FALSE); | |
549 | } | |
550 | ||
fcff0f35 PD |
551 | /* |
552 | * This is the callback function to traverse_dataset that acts as the worker | |
553 | * thread for dmu_send_impl. | |
554 | */ | |
555 | /*ARGSUSED*/ | |
556 | static int | |
557 | send_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, | |
558 | const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg) | |
559 | { | |
560 | struct send_thread_arg *sta = arg; | |
561 | struct send_block_record *record; | |
562 | uint64_t record_size; | |
563 | int err = 0; | |
564 | ||
47dfff3b MA |
565 | ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || |
566 | zb->zb_object >= sta->resume.zb_object); | |
567 | ||
fcff0f35 PD |
568 | if (sta->cancel) |
569 | return (SET_ERROR(EINTR)); | |
34dc7c2f | 570 | |
fcff0f35 PD |
571 | if (bp == NULL) { |
572 | ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL); | |
573 | return (0); | |
574 | } else if (zb->zb_level < 0) { | |
575 | return (0); | |
576 | } | |
577 | ||
578 | record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP); | |
579 | record->eos_marker = B_FALSE; | |
580 | record->bp = *bp; | |
581 | record->zb = *zb; | |
582 | record->indblkshift = dnp->dn_indblkshift; | |
583 | record->datablkszsec = dnp->dn_datablkszsec; | |
584 | record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
585 | bqueue_enqueue(&sta->q, record, record_size); | |
586 | ||
587 | return (err); | |
588 | } | |
589 | ||
590 | /* | |
591 | * This function kicks off the traverse_dataset. It also handles setting the | |
592 | * error code of the thread in case something goes wrong, and pushes the End of | |
593 | * Stream record when the traverse_dataset call has finished. If there is no | |
594 | * dataset to traverse, the thread immediately pushes End of Stream marker. | |
595 | */ | |
596 | static void | |
597 | send_traverse_thread(void *arg) | |
598 | { | |
599 | struct send_thread_arg *st_arg = arg; | |
600 | int err; | |
601 | struct send_block_record *data; | |
3e635ac1 | 602 | fstrans_cookie_t cookie = spl_fstrans_mark(); |
fcff0f35 PD |
603 | |
604 | if (st_arg->ds != NULL) { | |
47dfff3b MA |
605 | err = traverse_dataset_resume(st_arg->ds, |
606 | st_arg->fromtxg, &st_arg->resume, | |
607 | st_arg->flags, send_cb, st_arg); | |
608 | ||
fcff0f35 PD |
609 | if (err != EINTR) |
610 | st_arg->error_code = err; | |
611 | } | |
612 | data = kmem_zalloc(sizeof (*data), KM_SLEEP); | |
613 | data->eos_marker = B_TRUE; | |
614 | bqueue_enqueue(&st_arg->q, data, 1); | |
3e635ac1 | 615 | spl_fstrans_unmark(cookie); |
fcff0f35 PD |
616 | } |
617 | ||
618 | /* | |
619 | * This function actually handles figuring out what kind of record needs to be | |
620 | * dumped, reading the data (which has hopefully been prefetched), and calling | |
621 | * the appropriate helper function. | |
622 | */ | |
34dc7c2f | 623 | static int |
fcff0f35 | 624 | do_dump(dmu_sendarg_t *dsa, struct send_block_record *data) |
34dc7c2f | 625 | { |
fcff0f35 PD |
626 | dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os); |
627 | const blkptr_t *bp = &data->bp; | |
628 | const zbookmark_phys_t *zb = &data->zb; | |
629 | uint8_t indblkshift = data->indblkshift; | |
630 | uint16_t dblkszsec = data->datablkszsec; | |
631 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
34dc7c2f | 632 | dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; |
34dc7c2f | 633 | int err = 0; |
fcff0f35 | 634 | uint64_t dnobj; |
34dc7c2f | 635 | |
fcff0f35 | 636 | ASSERT3U(zb->zb_level, >=, 0); |
34dc7c2f | 637 | |
47dfff3b MA |
638 | ASSERT(zb->zb_object == DMU_META_DNODE_OBJECT || |
639 | zb->zb_object >= dsa->dsa_resume_object); | |
640 | ||
428870ff BB |
641 | if (zb->zb_object != DMU_META_DNODE_OBJECT && |
642 | DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { | |
9babb374 | 643 | return (0); |
b0bc7a84 MG |
644 | } else if (BP_IS_HOLE(bp) && |
645 | zb->zb_object == DMU_META_DNODE_OBJECT) { | |
fcff0f35 | 646 | uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); |
b128c09f | 647 | uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; |
fcff0f35 | 648 | err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT); |
b0bc7a84 | 649 | } else if (BP_IS_HOLE(bp)) { |
fcff0f35 PD |
650 | uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); |
651 | uint64_t offset = zb->zb_blkid * span; | |
652 | err = dump_free(dsa, zb->zb_object, offset, span); | |
b128c09f BB |
653 | } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { |
654 | return (0); | |
655 | } else if (type == DMU_OT_DNODE) { | |
50c957f7 NB |
656 | dnode_phys_t *blk; |
657 | int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; | |
2a432414 | 658 | arc_flags_t aflags = ARC_FLAG_WAIT; |
b128c09f | 659 | arc_buf_t *abuf; |
fcff0f35 PD |
660 | int i; |
661 | ||
662 | ASSERT0(zb->zb_level); | |
b128c09f | 663 | |
294f6806 GW |
664 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
665 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
666 | &aflags, zb) != 0) | |
2e528b49 | 667 | return (SET_ERROR(EIO)); |
34dc7c2f | 668 | |
b128c09f | 669 | blk = abuf->b_data; |
50c957f7 NB |
670 | dnobj = zb->zb_blkid * epb; |
671 | for (i = 0; i < epb; i += blk[i].dn_extra_slots + 1) { | |
fcff0f35 | 672 | err = dump_dnode(dsa, dnobj + i, blk + i); |
13fe0198 | 673 | if (err != 0) |
34dc7c2f BB |
674 | break; |
675 | } | |
d3c2ae1c | 676 | arc_buf_destroy(abuf, &abuf); |
428870ff | 677 | } else if (type == DMU_OT_SA) { |
2a432414 | 678 | arc_flags_t aflags = ARC_FLAG_WAIT; |
b128c09f | 679 | arc_buf_t *abuf; |
34dc7c2f | 680 | int blksz = BP_GET_LSIZE(bp); |
b128c09f | 681 | |
294f6806 GW |
682 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
683 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
684 | &aflags, zb) != 0) | |
2e528b49 | 685 | return (SET_ERROR(EIO)); |
b128c09f | 686 | |
fcff0f35 | 687 | err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data); |
d3c2ae1c | 688 | arc_buf_destroy(abuf, &abuf); |
fcff0f35 | 689 | } else if (backup_do_embed(dsa, bp)) { |
9b67f605 | 690 | /* it's an embedded level-0 block of a regular object */ |
fcff0f35 PD |
691 | int blksz = dblkszsec << SPA_MINBLOCKSHIFT; |
692 | ASSERT0(zb->zb_level); | |
693 | err = dump_write_embedded(dsa, zb->zb_object, | |
9b67f605 | 694 | zb->zb_blkid * blksz, blksz, bp); |
fcff0f35 PD |
695 | } else { |
696 | /* it's a level-0 block of a regular object */ | |
2a432414 | 697 | arc_flags_t aflags = ARC_FLAG_WAIT; |
428870ff | 698 | arc_buf_t *abuf; |
fcff0f35 PD |
699 | int blksz = dblkszsec << SPA_MINBLOCKSHIFT; |
700 | uint64_t offset; | |
2aa34383 DK |
701 | enum zio_flag zioflags = ZIO_FLAG_CANFAIL; |
702 | ||
703 | /* | |
704 | * If we have large blocks stored on disk but the send flags | |
705 | * don't allow us to send large blocks, we split the data from | |
706 | * the arc buf into chunks. | |
707 | */ | |
708 | boolean_t split_large_blocks = | |
709 | data->datablkszsec > SPA_OLD_MAXBLOCKSIZE && | |
710 | !(dsa->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS); | |
711 | /* | |
712 | * We should only request compressed data from the ARC if all | |
713 | * the following are true: | |
714 | * - stream compression was requested | |
715 | * - we aren't splitting large blocks into smaller chunks | |
716 | * - the data won't need to be byteswapped before sending | |
717 | * - this isn't an embedded block | |
718 | * - this isn't metadata (if receiving on a different endian | |
719 | * system it can be byteswapped more easily) | |
720 | */ | |
721 | boolean_t request_compressed = | |
722 | (dsa->dsa_featureflags & DMU_BACKUP_FEATURE_COMPRESSED) && | |
723 | !split_large_blocks && !BP_SHOULD_BYTESWAP(bp) && | |
724 | !BP_IS_EMBEDDED(bp) && !DMU_OT_IS_METADATA(BP_GET_TYPE(bp)); | |
428870ff | 725 | |
da536844 | 726 | ASSERT0(zb->zb_level); |
47dfff3b MA |
727 | ASSERT(zb->zb_object > dsa->dsa_resume_object || |
728 | (zb->zb_object == dsa->dsa_resume_object && | |
729 | zb->zb_blkid * blksz >= dsa->dsa_resume_offset)); | |
730 | ||
2aa34383 DK |
731 | if (request_compressed) |
732 | zioflags |= ZIO_FLAG_RAW; | |
733 | ||
294f6806 | 734 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
2aa34383 | 735 | ZIO_PRIORITY_ASYNC_READ, zioflags, |
294f6806 | 736 | &aflags, zb) != 0) { |
330d06f9 MA |
737 | if (zfs_send_corrupt_data) { |
738 | uint64_t *ptr; | |
739 | /* Send a block filled with 0x"zfs badd bloc" */ | |
2aa34383 DK |
740 | abuf = arc_alloc_buf(spa, &abuf, ARC_BUFC_DATA, |
741 | blksz); | |
330d06f9 MA |
742 | for (ptr = abuf->b_data; |
743 | (char *)ptr < (char *)abuf->b_data + blksz; | |
744 | ptr++) | |
dd26aa53 | 745 | *ptr = 0x2f5baddb10cULL; |
330d06f9 | 746 | } else { |
2e528b49 | 747 | return (SET_ERROR(EIO)); |
330d06f9 MA |
748 | } |
749 | } | |
428870ff | 750 | |
f1512ee6 MA |
751 | offset = zb->zb_blkid * blksz; |
752 | ||
2aa34383 | 753 | if (split_large_blocks) { |
f1512ee6 | 754 | char *buf = abuf->b_data; |
2aa34383 DK |
755 | ASSERT3U(arc_get_compression(abuf), ==, |
756 | ZIO_COMPRESS_OFF); | |
f1512ee6 MA |
757 | while (blksz > 0 && err == 0) { |
758 | int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); | |
fcff0f35 | 759 | err = dump_write(dsa, type, zb->zb_object, |
2aa34383 | 760 | offset, n, n, NULL, buf); |
f1512ee6 MA |
761 | offset += n; |
762 | buf += n; | |
763 | blksz -= n; | |
764 | } | |
765 | } else { | |
2aa34383 DK |
766 | err = dump_write(dsa, type, zb->zb_object, offset, |
767 | blksz, arc_buf_size(abuf), bp, | |
768 | abuf->b_data); | |
f1512ee6 | 769 | } |
d3c2ae1c | 770 | arc_buf_destroy(abuf, &abuf); |
34dc7c2f BB |
771 | } |
772 | ||
773 | ASSERT(err == 0 || err == EINTR); | |
774 | return (err); | |
775 | } | |
776 | ||
6f1ffb06 | 777 | /* |
fcff0f35 PD |
778 | * Pop the new data off the queue, and free the old data. |
779 | */ | |
780 | static struct send_block_record * | |
781 | get_next_record(bqueue_t *bq, struct send_block_record *data) | |
782 | { | |
783 | struct send_block_record *tmp = bqueue_dequeue(bq); | |
784 | kmem_free(data, sizeof (*data)); | |
785 | return (tmp); | |
786 | } | |
787 | ||
788 | /* | |
789 | * Actually do the bulk of the work in a zfs send. | |
790 | * | |
791 | * Note: Releases dp using the specified tag. | |
6f1ffb06 | 792 | */ |
13fe0198 | 793 | static int |
fcff0f35 | 794 | dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, |
2aa34383 DK |
795 | zfs_bookmark_phys_t *ancestor_zb, boolean_t is_clone, |
796 | boolean_t embedok, boolean_t large_block_ok, boolean_t compressok, | |
797 | int outfd, uint64_t resumeobj, uint64_t resumeoff, | |
47dfff3b | 798 | vnode_t *vp, offset_t *off) |
34dc7c2f | 799 | { |
13fe0198 | 800 | objset_t *os; |
34dc7c2f | 801 | dmu_replay_record_t *drr; |
37abac6d | 802 | dmu_sendarg_t *dsp; |
34dc7c2f BB |
803 | int err; |
804 | uint64_t fromtxg = 0; | |
9b67f605 | 805 | uint64_t featureflags = 0; |
fcff0f35 | 806 | struct send_thread_arg to_arg; |
47dfff3b MA |
807 | void *payload = NULL; |
808 | size_t payload_len = 0; | |
fcff0f35 | 809 | struct send_block_record *to_data; |
34dc7c2f | 810 | |
fcff0f35 | 811 | err = dmu_objset_from_ds(to_ds, &os); |
13fe0198 | 812 | if (err != 0) { |
13fe0198 MA |
813 | dsl_pool_rele(dp, tag); |
814 | return (err); | |
815 | } | |
34dc7c2f | 816 | |
34dc7c2f BB |
817 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
818 | drr->drr_type = DRR_BEGIN; | |
819 | drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
428870ff BB |
820 | DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, |
821 | DMU_SUBSTREAM); | |
822 | ||
47dfff3b MA |
823 | bzero(&to_arg, sizeof (to_arg)); |
824 | ||
428870ff | 825 | #ifdef _KERNEL |
13fe0198 | 826 | if (dmu_objset_type(os) == DMU_OST_ZFS) { |
428870ff | 827 | uint64_t version; |
13fe0198 | 828 | if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { |
37abac6d | 829 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
13fe0198 | 830 | dsl_pool_rele(dp, tag); |
2e528b49 | 831 | return (SET_ERROR(EINVAL)); |
37abac6d | 832 | } |
13fe0198 | 833 | if (version >= ZPL_VERSION_SA) { |
9b67f605 | 834 | featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; |
428870ff BB |
835 | } |
836 | } | |
837 | #endif | |
838 | ||
fcff0f35 | 839 | if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) |
f1512ee6 | 840 | featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; |
50c957f7 NB |
841 | if (to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_DNODE]) |
842 | featureflags |= DMU_BACKUP_FEATURE_LARGE_DNODE; | |
9b67f605 MA |
843 | if (embedok && |
844 | spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
845 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; | |
2aa34383 DK |
846 | } |
847 | if (compressok) { | |
848 | featureflags |= DMU_BACKUP_FEATURE_COMPRESSED; | |
849 | } | |
850 | if ((featureflags & | |
851 | (DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_COMPRESSED)) != | |
852 | 0 && spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) { | |
853 | featureflags |= DMU_BACKUP_FEATURE_LZ4; | |
9b67f605 MA |
854 | } |
855 | ||
47dfff3b MA |
856 | if (resumeobj != 0 || resumeoff != 0) { |
857 | featureflags |= DMU_BACKUP_FEATURE_RESUMING; | |
858 | } | |
859 | ||
9b67f605 MA |
860 | DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, |
861 | featureflags); | |
862 | ||
34dc7c2f | 863 | drr->drr_u.drr_begin.drr_creation_time = |
fcff0f35 | 864 | dsl_dataset_phys(to_ds)->ds_creation_time; |
13fe0198 | 865 | drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); |
da536844 | 866 | if (is_clone) |
34dc7c2f | 867 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; |
fcff0f35 PD |
868 | drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid; |
869 | if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET) | |
34dc7c2f | 870 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; |
b607405f AS |
871 | if (zfs_send_set_freerecords_bit) |
872 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_FREERECORDS; | |
34dc7c2f | 873 | |
fcff0f35 PD |
874 | if (ancestor_zb != NULL) { |
875 | drr->drr_u.drr_begin.drr_fromguid = | |
876 | ancestor_zb->zbm_guid; | |
877 | fromtxg = ancestor_zb->zbm_creation_txg; | |
da536844 | 878 | } |
fcff0f35 PD |
879 | dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname); |
880 | if (!to_ds->ds_is_snapshot) { | |
da536844 MA |
881 | (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", |
882 | sizeof (drr->drr_u.drr_begin.drr_toname)); | |
13fe0198 | 883 | } |
34dc7c2f | 884 | |
37abac6d BP |
885 | dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); |
886 | ||
887 | dsp->dsa_drr = drr; | |
888 | dsp->dsa_vp = vp; | |
889 | dsp->dsa_outfd = outfd; | |
890 | dsp->dsa_proc = curproc; | |
13fe0198 | 891 | dsp->dsa_os = os; |
37abac6d | 892 | dsp->dsa_off = off; |
fcff0f35 | 893 | dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid; |
37abac6d | 894 | dsp->dsa_pending_op = PENDING_NONE; |
9b67f605 | 895 | dsp->dsa_featureflags = featureflags; |
47dfff3b MA |
896 | dsp->dsa_resume_object = resumeobj; |
897 | dsp->dsa_resume_offset = resumeoff; | |
37abac6d | 898 | |
fcff0f35 PD |
899 | mutex_enter(&to_ds->ds_sendstream_lock); |
900 | list_insert_head(&to_ds->ds_sendstreams, dsp); | |
901 | mutex_exit(&to_ds->ds_sendstream_lock); | |
37abac6d | 902 | |
fcff0f35 | 903 | dsl_dataset_long_hold(to_ds, FTAG); |
7ec09286 MA |
904 | dsl_pool_rele(dp, tag); |
905 | ||
47dfff3b MA |
906 | if (resumeobj != 0 || resumeoff != 0) { |
907 | dmu_object_info_t to_doi; | |
908 | nvlist_t *nvl; | |
909 | err = dmu_object_info(os, resumeobj, &to_doi); | |
910 | if (err != 0) | |
911 | goto out; | |
912 | SET_BOOKMARK(&to_arg.resume, to_ds->ds_object, resumeobj, 0, | |
913 | resumeoff / to_doi.doi_data_block_size); | |
914 | ||
915 | nvl = fnvlist_alloc(); | |
916 | fnvlist_add_uint64(nvl, "resume_object", resumeobj); | |
917 | fnvlist_add_uint64(nvl, "resume_offset", resumeoff); | |
918 | payload = fnvlist_pack(nvl, &payload_len); | |
919 | drr->drr_payloadlen = payload_len; | |
920 | fnvlist_free(nvl); | |
921 | } | |
922 | ||
923 | err = dump_record(dsp, payload, payload_len); | |
924 | fnvlist_pack_free(payload, payload_len); | |
925 | if (err != 0) { | |
37abac6d BP |
926 | err = dsp->dsa_err; |
927 | goto out; | |
34dc7c2f BB |
928 | } |
929 | ||
fcff0f35 PD |
930 | err = bqueue_init(&to_arg.q, zfs_send_queue_length, |
931 | offsetof(struct send_block_record, ln)); | |
932 | to_arg.error_code = 0; | |
933 | to_arg.cancel = B_FALSE; | |
934 | to_arg.ds = to_ds; | |
935 | to_arg.fromtxg = fromtxg; | |
936 | to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH; | |
937 | (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, curproc, | |
938 | TS_RUN, minclsyspri); | |
939 | ||
940 | to_data = bqueue_dequeue(&to_arg.q); | |
941 | ||
942 | while (!to_data->eos_marker && err == 0) { | |
943 | err = do_dump(dsp, to_data); | |
944 | to_data = get_next_record(&to_arg.q, to_data); | |
945 | if (issig(JUSTLOOKING) && issig(FORREAL)) | |
946 | err = EINTR; | |
947 | } | |
948 | ||
949 | if (err != 0) { | |
950 | to_arg.cancel = B_TRUE; | |
951 | while (!to_data->eos_marker) { | |
952 | to_data = get_next_record(&to_arg.q, to_data); | |
953 | } | |
954 | } | |
955 | kmem_free(to_data, sizeof (*to_data)); | |
956 | ||
957 | bqueue_destroy(&to_arg.q); | |
958 | ||
959 | if (err == 0 && to_arg.error_code != 0) | |
960 | err = to_arg.error_code; | |
961 | ||
962 | if (err != 0) | |
963 | goto out; | |
34dc7c2f | 964 | |
37abac6d | 965 | if (dsp->dsa_pending_op != PENDING_NONE) |
37f8a883 | 966 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 967 | err = SET_ERROR(EINTR); |
428870ff | 968 | |
13fe0198 MA |
969 | if (err != 0) { |
970 | if (err == EINTR && dsp->dsa_err != 0) | |
37abac6d BP |
971 | err = dsp->dsa_err; |
972 | goto out; | |
34dc7c2f BB |
973 | } |
974 | ||
975 | bzero(drr, sizeof (dmu_replay_record_t)); | |
976 | drr->drr_type = DRR_END; | |
37abac6d BP |
977 | drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; |
978 | drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; | |
34dc7c2f | 979 | |
fcff0f35 | 980 | if (dump_record(dsp, NULL, 0) != 0) |
37abac6d | 981 | err = dsp->dsa_err; |
34dc7c2f | 982 | |
37abac6d | 983 | out: |
fcff0f35 PD |
984 | mutex_enter(&to_ds->ds_sendstream_lock); |
985 | list_remove(&to_ds->ds_sendstreams, dsp); | |
986 | mutex_exit(&to_ds->ds_sendstream_lock); | |
37abac6d | 987 | |
51907a31 K |
988 | VERIFY(err != 0 || (dsp->dsa_sent_begin && dsp->dsa_sent_end)); |
989 | ||
34dc7c2f | 990 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
37abac6d | 991 | kmem_free(dsp, sizeof (dmu_sendarg_t)); |
34dc7c2f | 992 | |
fcff0f35 | 993 | dsl_dataset_long_rele(to_ds, FTAG); |
13fe0198 | 994 | |
37abac6d | 995 | return (err); |
34dc7c2f BB |
996 | } |
997 | ||
330d06f9 | 998 | int |
13fe0198 | 999 | dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, |
2aa34383 | 1000 | boolean_t embedok, boolean_t large_block_ok, boolean_t compressok, |
f1512ee6 | 1001 | int outfd, vnode_t *vp, offset_t *off) |
13fe0198 MA |
1002 | { |
1003 | dsl_pool_t *dp; | |
1004 | dsl_dataset_t *ds; | |
1005 | dsl_dataset_t *fromds = NULL; | |
1006 | int err; | |
1007 | ||
1008 | err = dsl_pool_hold(pool, FTAG, &dp); | |
1009 | if (err != 0) | |
1010 | return (err); | |
1011 | ||
1012 | err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); | |
1013 | if (err != 0) { | |
1014 | dsl_pool_rele(dp, FTAG); | |
1015 | return (err); | |
1016 | } | |
1017 | ||
1018 | if (fromsnap != 0) { | |
da536844 MA |
1019 | zfs_bookmark_phys_t zb; |
1020 | boolean_t is_clone; | |
1021 | ||
13fe0198 MA |
1022 | err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); |
1023 | if (err != 0) { | |
1024 | dsl_dataset_rele(ds, FTAG); | |
1025 | dsl_pool_rele(dp, FTAG); | |
1026 | return (err); | |
1027 | } | |
da536844 MA |
1028 | if (!dsl_dataset_is_before(ds, fromds, 0)) |
1029 | err = SET_ERROR(EXDEV); | |
d683ddbb JG |
1030 | zb.zbm_creation_time = |
1031 | dsl_dataset_phys(fromds)->ds_creation_time; | |
1032 | zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; | |
1033 | zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; | |
da536844 MA |
1034 | is_clone = (fromds->ds_dir != ds->ds_dir); |
1035 | dsl_dataset_rele(fromds, FTAG); | |
f1512ee6 | 1036 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, |
2aa34383 | 1037 | embedok, large_block_ok, compressok, outfd, 0, 0, vp, off); |
da536844 | 1038 | } else { |
f1512ee6 | 1039 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, |
2aa34383 | 1040 | embedok, large_block_ok, compressok, outfd, 0, 0, vp, off); |
13fe0198 | 1041 | } |
da536844 MA |
1042 | dsl_dataset_rele(ds, FTAG); |
1043 | return (err); | |
13fe0198 MA |
1044 | } |
1045 | ||
1046 | int | |
47dfff3b | 1047 | dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok, |
2aa34383 DK |
1048 | boolean_t large_block_ok, boolean_t compressok, int outfd, |
1049 | uint64_t resumeobj, uint64_t resumeoff, | |
47dfff3b | 1050 | vnode_t *vp, offset_t *off) |
13fe0198 MA |
1051 | { |
1052 | dsl_pool_t *dp; | |
1053 | dsl_dataset_t *ds; | |
13fe0198 | 1054 | int err; |
da536844 | 1055 | boolean_t owned = B_FALSE; |
13fe0198 | 1056 | |
da536844 | 1057 | if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) |
2e528b49 | 1058 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1059 | |
1060 | err = dsl_pool_hold(tosnap, FTAG, &dp); | |
1061 | if (err != 0) | |
1062 | return (err); | |
1063 | ||
da536844 MA |
1064 | if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { |
1065 | /* | |
1066 | * We are sending a filesystem or volume. Ensure | |
1067 | * that it doesn't change by owning the dataset. | |
1068 | */ | |
1069 | err = dsl_dataset_own(dp, tosnap, FTAG, &ds); | |
1070 | owned = B_TRUE; | |
1071 | } else { | |
1072 | err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); | |
1073 | } | |
13fe0198 MA |
1074 | if (err != 0) { |
1075 | dsl_pool_rele(dp, FTAG); | |
1076 | return (err); | |
1077 | } | |
1078 | ||
1079 | if (fromsnap != NULL) { | |
da536844 MA |
1080 | zfs_bookmark_phys_t zb; |
1081 | boolean_t is_clone = B_FALSE; | |
1082 | int fsnamelen = strchr(tosnap, '@') - tosnap; | |
1083 | ||
1084 | /* | |
1085 | * If the fromsnap is in a different filesystem, then | |
1086 | * mark the send stream as a clone. | |
1087 | */ | |
1088 | if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || | |
1089 | (fromsnap[fsnamelen] != '@' && | |
1090 | fromsnap[fsnamelen] != '#')) { | |
1091 | is_clone = B_TRUE; | |
1092 | } | |
1093 | ||
1094 | if (strchr(fromsnap, '@')) { | |
1095 | dsl_dataset_t *fromds; | |
1096 | err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); | |
1097 | if (err == 0) { | |
1098 | if (!dsl_dataset_is_before(ds, fromds, 0)) | |
1099 | err = SET_ERROR(EXDEV); | |
1100 | zb.zbm_creation_time = | |
d683ddbb | 1101 | dsl_dataset_phys(fromds)->ds_creation_time; |
da536844 | 1102 | zb.zbm_creation_txg = |
d683ddbb JG |
1103 | dsl_dataset_phys(fromds)->ds_creation_txg; |
1104 | zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; | |
da536844 MA |
1105 | is_clone = (ds->ds_dir != fromds->ds_dir); |
1106 | dsl_dataset_rele(fromds, FTAG); | |
1107 | } | |
1108 | } else { | |
1109 | err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); | |
1110 | } | |
13fe0198 MA |
1111 | if (err != 0) { |
1112 | dsl_dataset_rele(ds, FTAG); | |
1113 | dsl_pool_rele(dp, FTAG); | |
1114 | return (err); | |
1115 | } | |
f1512ee6 | 1116 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, |
2aa34383 | 1117 | embedok, large_block_ok, compressok, |
47dfff3b | 1118 | outfd, resumeobj, resumeoff, vp, off); |
da536844 | 1119 | } else { |
f1512ee6 | 1120 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, |
2aa34383 | 1121 | embedok, large_block_ok, compressok, |
47dfff3b | 1122 | outfd, resumeobj, resumeoff, vp, off); |
13fe0198 | 1123 | } |
da536844 MA |
1124 | if (owned) |
1125 | dsl_dataset_disown(ds, FTAG); | |
1126 | else | |
1127 | dsl_dataset_rele(ds, FTAG); | |
1128 | return (err); | |
13fe0198 MA |
1129 | } |
1130 | ||
5dc8b736 | 1131 | static int |
2aa34383 DK |
1132 | dmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t uncompressed, |
1133 | uint64_t compressed, boolean_t stream_compressed, uint64_t *sizep) | |
5dc8b736 MG |
1134 | { |
1135 | int err; | |
2aa34383 | 1136 | uint64_t size; |
5dc8b736 MG |
1137 | /* |
1138 | * Assume that space (both on-disk and in-stream) is dominated by | |
1139 | * data. We will adjust for indirect blocks and the copies property, | |
1140 | * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). | |
1141 | */ | |
1142 | ||
2aa34383 DK |
1143 | uint64_t recordsize; |
1144 | uint64_t record_count; | |
1145 | ||
1146 | /* Assume all (uncompressed) blocks are recordsize. */ | |
1147 | err = dsl_prop_get_int_ds(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE), | |
1148 | &recordsize); | |
1149 | if (err != 0) | |
1150 | return (err); | |
1151 | record_count = uncompressed / recordsize; | |
1152 | ||
1153 | /* | |
1154 | * If we're estimating a send size for a compressed stream, use the | |
1155 | * compressed data size to estimate the stream size. Otherwise, use the | |
1156 | * uncompressed data size. | |
1157 | */ | |
1158 | size = stream_compressed ? compressed : uncompressed; | |
1159 | ||
5dc8b736 MG |
1160 | /* |
1161 | * Subtract out approximate space used by indirect blocks. | |
1162 | * Assume most space is used by data blocks (non-indirect, non-dnode). | |
2aa34383 | 1163 | * Assume no ditto blocks or internal fragmentation. |
5dc8b736 MG |
1164 | * |
1165 | * Therefore, space used by indirect blocks is sizeof(blkptr_t) per | |
2aa34383 | 1166 | * block. |
5dc8b736 | 1167 | */ |
2aa34383 | 1168 | size -= record_count * sizeof (blkptr_t); |
5dc8b736 MG |
1169 | |
1170 | /* Add in the space for the record associated with each block. */ | |
2aa34383 | 1171 | size += record_count * sizeof (dmu_replay_record_t); |
5dc8b736 MG |
1172 | |
1173 | *sizep = size; | |
1174 | ||
1175 | return (0); | |
1176 | } | |
1177 | ||
13fe0198 | 1178 | int |
2aa34383 DK |
1179 | dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, |
1180 | boolean_t stream_compressed, uint64_t *sizep) | |
330d06f9 | 1181 | { |
330d06f9 | 1182 | int err; |
2aa34383 | 1183 | uint64_t uncomp, comp; |
13fe0198 | 1184 | |
fd0fd646 | 1185 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
330d06f9 MA |
1186 | |
1187 | /* tosnap must be a snapshot */ | |
0c66c32d | 1188 | if (!ds->ds_is_snapshot) |
2e528b49 | 1189 | return (SET_ERROR(EINVAL)); |
330d06f9 | 1190 | |
71e2fe41 AG |
1191 | /* fromsnap, if provided, must be a snapshot */ |
1192 | if (fromds != NULL && !fromds->ds_is_snapshot) | |
1193 | return (SET_ERROR(EINVAL)); | |
1194 | ||
6f1ffb06 MA |
1195 | /* |
1196 | * fromsnap must be an earlier snapshot from the same fs as tosnap, | |
1197 | * or the origin's fs. | |
1198 | */ | |
da536844 | 1199 | if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) |
2e528b49 | 1200 | return (SET_ERROR(EXDEV)); |
330d06f9 | 1201 | |
2aa34383 | 1202 | /* Get compressed and uncompressed size estimates of changed data. */ |
330d06f9 | 1203 | if (fromds == NULL) { |
2aa34383 DK |
1204 | uncomp = dsl_dataset_phys(ds)->ds_uncompressed_bytes; |
1205 | comp = dsl_dataset_phys(ds)->ds_compressed_bytes; | |
330d06f9 | 1206 | } else { |
2aa34383 | 1207 | uint64_t used; |
330d06f9 | 1208 | err = dsl_dataset_space_written(fromds, ds, |
2aa34383 | 1209 | &used, &comp, &uncomp); |
13fe0198 | 1210 | if (err != 0) |
330d06f9 MA |
1211 | return (err); |
1212 | } | |
1213 | ||
2aa34383 DK |
1214 | err = dmu_adjust_send_estimate_for_indirects(ds, uncomp, comp, |
1215 | stream_compressed, sizep); | |
5dc8b736 MG |
1216 | return (err); |
1217 | } | |
330d06f9 | 1218 | |
2aa34383 DK |
1219 | struct calculate_send_arg { |
1220 | uint64_t uncompressed; | |
1221 | uint64_t compressed; | |
1222 | }; | |
1223 | ||
5dc8b736 MG |
1224 | /* |
1225 | * Simple callback used to traverse the blocks of a snapshot and sum their | |
2aa34383 | 1226 | * uncompressed and compressed sizes. |
5dc8b736 MG |
1227 | */ |
1228 | /* ARGSUSED */ | |
1229 | static int | |
1230 | dmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, | |
1231 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) | |
1232 | { | |
2aa34383 | 1233 | struct calculate_send_arg *space = arg; |
5dc8b736 | 1234 | if (bp != NULL && !BP_IS_HOLE(bp)) { |
2aa34383 DK |
1235 | space->uncompressed += BP_GET_UCSIZE(bp); |
1236 | space->compressed += BP_GET_PSIZE(bp); | |
5dc8b736 MG |
1237 | } |
1238 | return (0); | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Given a desination snapshot and a TXG, calculate the approximate size of a | |
1243 | * send stream sent from that TXG. from_txg may be zero, indicating that the | |
1244 | * whole snapshot will be sent. | |
1245 | */ | |
1246 | int | |
1247 | dmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, | |
2aa34383 | 1248 | boolean_t stream_compressed, uint64_t *sizep) |
5dc8b736 | 1249 | { |
5dc8b736 | 1250 | int err; |
2aa34383 | 1251 | struct calculate_send_arg size = { 0 }; |
5dc8b736 | 1252 | |
fd0fd646 | 1253 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
5dc8b736 MG |
1254 | |
1255 | /* tosnap must be a snapshot */ | |
1256 | if (!dsl_dataset_is_snapshot(ds)) | |
1257 | return (SET_ERROR(EINVAL)); | |
1258 | ||
1259 | /* verify that from_txg is before the provided snapshot was taken */ | |
1260 | if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { | |
1261 | return (SET_ERROR(EXDEV)); | |
1262 | } | |
330d06f9 | 1263 | /* |
5dc8b736 MG |
1264 | * traverse the blocks of the snapshot with birth times after |
1265 | * from_txg, summing their uncompressed size | |
330d06f9 | 1266 | */ |
5dc8b736 MG |
1267 | err = traverse_dataset(ds, from_txg, TRAVERSE_POST, |
1268 | dmu_calculate_send_traversal, &size); | |
2aa34383 | 1269 | |
5dc8b736 | 1270 | if (err) |
330d06f9 | 1271 | return (err); |
330d06f9 | 1272 | |
2aa34383 DK |
1273 | err = dmu_adjust_send_estimate_for_indirects(ds, size.uncompressed, |
1274 | size.compressed, stream_compressed, sizep); | |
5dc8b736 | 1275 | return (err); |
330d06f9 MA |
1276 | } |
1277 | ||
13fe0198 MA |
1278 | typedef struct dmu_recv_begin_arg { |
1279 | const char *drba_origin; | |
1280 | dmu_recv_cookie_t *drba_cookie; | |
1281 | cred_t *drba_cred; | |
19580676 | 1282 | uint64_t drba_snapobj; |
13fe0198 | 1283 | } dmu_recv_begin_arg_t; |
34dc7c2f | 1284 | |
34dc7c2f | 1285 | static int |
13fe0198 MA |
1286 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, |
1287 | uint64_t fromguid) | |
34dc7c2f | 1288 | { |
34dc7c2f | 1289 | uint64_t val; |
13fe0198 MA |
1290 | int error; |
1291 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
34dc7c2f | 1292 | |
13fe0198 MA |
1293 | /* temporary clone name must not exist */ |
1294 | error = zap_lookup(dp->dp_meta_objset, | |
d683ddbb | 1295 | dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, |
13fe0198 MA |
1296 | 8, 1, &val); |
1297 | if (error != ENOENT) | |
1298 | return (error == 0 ? EBUSY : error); | |
1299 | ||
572e2857 | 1300 | /* new snapshot name must not exist */ |
13fe0198 | 1301 | error = zap_lookup(dp->dp_meta_objset, |
d683ddbb JG |
1302 | dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
1303 | drba->drba_cookie->drc_tosnap, 8, 1, &val); | |
13fe0198 MA |
1304 | if (error != ENOENT) |
1305 | return (error == 0 ? EEXIST : error); | |
572e2857 | 1306 | |
788eb90c JJ |
1307 | /* |
1308 | * Check snapshot limit before receiving. We'll recheck again at the | |
1309 | * end, but might as well abort before receiving if we're already over | |
1310 | * the limit. | |
1311 | * | |
1312 | * Note that we do not check the file system limit with | |
1313 | * dsl_dir_fscount_check because the temporary %clones don't count | |
1314 | * against that limit. | |
1315 | */ | |
1316 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, | |
1317 | NULL, drba->drba_cred); | |
1318 | if (error != 0) | |
1319 | return (error); | |
1320 | ||
13fe0198 | 1321 | if (fromguid != 0) { |
19580676 | 1322 | dsl_dataset_t *snap; |
d683ddbb | 1323 | uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
19580676 MA |
1324 | |
1325 | /* Find snapshot in this dir that matches fromguid. */ | |
1326 | while (obj != 0) { | |
1327 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
1328 | &snap); | |
1329 | if (error != 0) | |
1330 | return (SET_ERROR(ENODEV)); | |
1331 | if (snap->ds_dir != ds->ds_dir) { | |
1332 | dsl_dataset_rele(snap, FTAG); | |
1333 | return (SET_ERROR(ENODEV)); | |
1334 | } | |
d683ddbb | 1335 | if (dsl_dataset_phys(snap)->ds_guid == fromguid) |
19580676 | 1336 | break; |
d683ddbb | 1337 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
1338 | dsl_dataset_rele(snap, FTAG); |
1339 | } | |
1340 | if (obj == 0) | |
2e528b49 | 1341 | return (SET_ERROR(ENODEV)); |
34dc7c2f | 1342 | |
19580676 MA |
1343 | if (drba->drba_cookie->drc_force) { |
1344 | drba->drba_snapobj = obj; | |
1345 | } else { | |
1346 | /* | |
1347 | * If we are not forcing, there must be no | |
1348 | * changes since fromsnap. | |
1349 | */ | |
1350 | if (dsl_dataset_modified_since_snap(ds, snap)) { | |
428870ff | 1351 | dsl_dataset_rele(snap, FTAG); |
19580676 | 1352 | return (SET_ERROR(ETXTBSY)); |
428870ff | 1353 | } |
19580676 | 1354 | drba->drba_snapobj = ds->ds_prev->ds_object; |
428870ff | 1355 | } |
19580676 MA |
1356 | |
1357 | dsl_dataset_rele(snap, FTAG); | |
428870ff | 1358 | } else { |
cf50a2b0 AG |
1359 | /* if full, then must be forced */ |
1360 | if (!drba->drba_cookie->drc_force) | |
1361 | return (SET_ERROR(EEXIST)); | |
1362 | /* start from $ORIGIN@$ORIGIN, if supported */ | |
1363 | drba->drba_snapobj = dp->dp_origin_snap != NULL ? | |
1364 | dp->dp_origin_snap->ds_object : 0; | |
428870ff | 1365 | } |
34dc7c2f | 1366 | |
34dc7c2f | 1367 | return (0); |
13fe0198 MA |
1368 | |
1369 | } | |
1370 | ||
1371 | static int | |
1372 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
1373 | { | |
1374 | dmu_recv_begin_arg_t *drba = arg; | |
1375 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1376 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1377 | uint64_t fromguid = drrb->drr_fromguid; | |
1378 | int flags = drrb->drr_flags; | |
1379 | int error; | |
9b67f605 | 1380 | uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
13fe0198 MA |
1381 | dsl_dataset_t *ds; |
1382 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1383 | ||
1384 | /* already checked */ | |
1385 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
47dfff3b | 1386 | ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING)); |
13fe0198 MA |
1387 | |
1388 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
1389 | DMU_COMPOUNDSTREAM || | |
1390 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
1391 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
2e528b49 | 1392 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1393 | |
1394 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
9b67f605 MA |
1395 | if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && |
1396 | spa_version(dp->dp_spa) < SPA_VERSION_SA) | |
1397 | return (SET_ERROR(ENOTSUP)); | |
1398 | ||
47dfff3b MA |
1399 | if (drba->drba_cookie->drc_resumable && |
1400 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET)) | |
1401 | return (SET_ERROR(ENOTSUP)); | |
1402 | ||
9b67f605 MA |
1403 | /* |
1404 | * The receiving code doesn't know how to translate a WRITE_EMBEDDED | |
2aa34383 | 1405 | * record to a plain WRITE record, so the pool must have the |
9b67f605 MA |
1406 | * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED |
1407 | * records. Same with WRITE_EMBEDDED records that use LZ4 compression. | |
1408 | */ | |
1409 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && | |
1410 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) | |
1411 | return (SET_ERROR(ENOTSUP)); | |
2aa34383 | 1412 | if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && |
9b67f605 | 1413 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) |
2e528b49 | 1414 | return (SET_ERROR(ENOTSUP)); |
13fe0198 | 1415 | |
f1512ee6 MA |
1416 | /* |
1417 | * The receiving code doesn't know how to translate large blocks | |
1418 | * to smaller ones, so the pool must have the LARGE_BLOCKS | |
1419 | * feature enabled if the stream has LARGE_BLOCKS. | |
1420 | */ | |
1421 | if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && | |
1422 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) | |
1423 | return (SET_ERROR(ENOTSUP)); | |
1424 | ||
50c957f7 NB |
1425 | /* |
1426 | * The receiving code doesn't know how to translate large dnodes | |
1427 | * to smaller ones, so the pool must have the LARGE_DNODE | |
1428 | * feature enabled if the stream has LARGE_DNODE. | |
1429 | */ | |
1430 | if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) && | |
1431 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_DNODE)) | |
1432 | return (SET_ERROR(ENOTSUP)); | |
1433 | ||
13fe0198 MA |
1434 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1435 | if (error == 0) { | |
1436 | /* target fs already exists; recv into temp clone */ | |
1437 | ||
1438 | /* Can't recv a clone into an existing fs */ | |
e6d3a843 | 1439 | if (flags & DRR_FLAG_CLONE || drba->drba_origin) { |
13fe0198 | 1440 | dsl_dataset_rele(ds, FTAG); |
2e528b49 | 1441 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1442 | } |
1443 | ||
1444 | error = recv_begin_check_existing_impl(drba, ds, fromguid); | |
1445 | dsl_dataset_rele(ds, FTAG); | |
1446 | } else if (error == ENOENT) { | |
1447 | /* target fs does not exist; must be a full backup or clone */ | |
eca7b760 | 1448 | char buf[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
1449 | |
1450 | /* | |
1451 | * If it's a non-clone incremental, we are missing the | |
1452 | * target fs, so fail the recv. | |
1453 | */ | |
fcff0f35 PD |
1454 | if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || |
1455 | drba->drba_origin)) | |
2e528b49 | 1456 | return (SET_ERROR(ENOENT)); |
13fe0198 | 1457 | |
e6d3a843 PD |
1458 | /* |
1459 | * If we're receiving a full send as a clone, and it doesn't | |
1460 | * contain all the necessary free records and freeobject | |
1461 | * records, reject it. | |
1462 | */ | |
1463 | if (fromguid == 0 && drba->drba_origin && | |
1464 | !(flags & DRR_FLAG_FREERECORDS)) | |
1465 | return (SET_ERROR(EINVAL)); | |
1466 | ||
13fe0198 | 1467 | /* Open the parent of tofs */ |
eca7b760 | 1468 | ASSERT3U(strlen(tofs), <, sizeof (buf)); |
13fe0198 MA |
1469 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); |
1470 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); | |
1471 | if (error != 0) | |
1472 | return (error); | |
1473 | ||
788eb90c JJ |
1474 | /* |
1475 | * Check filesystem and snapshot limits before receiving. We'll | |
1476 | * recheck snapshot limits again at the end (we create the | |
1477 | * filesystems and increment those counts during begin_sync). | |
1478 | */ | |
1479 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
1480 | ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); | |
1481 | if (error != 0) { | |
1482 | dsl_dataset_rele(ds, FTAG); | |
1483 | return (error); | |
1484 | } | |
1485 | ||
1486 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
1487 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); | |
1488 | if (error != 0) { | |
1489 | dsl_dataset_rele(ds, FTAG); | |
1490 | return (error); | |
1491 | } | |
1492 | ||
13fe0198 MA |
1493 | if (drba->drba_origin != NULL) { |
1494 | dsl_dataset_t *origin; | |
1495 | error = dsl_dataset_hold(dp, drba->drba_origin, | |
1496 | FTAG, &origin); | |
1497 | if (error != 0) { | |
1498 | dsl_dataset_rele(ds, FTAG); | |
1499 | return (error); | |
1500 | } | |
0c66c32d | 1501 | if (!origin->ds_is_snapshot) { |
13fe0198 MA |
1502 | dsl_dataset_rele(origin, FTAG); |
1503 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1504 | return (SET_ERROR(EINVAL)); |
13fe0198 | 1505 | } |
e6d3a843 PD |
1506 | if (dsl_dataset_phys(origin)->ds_guid != fromguid && |
1507 | fromguid != 0) { | |
13fe0198 MA |
1508 | dsl_dataset_rele(origin, FTAG); |
1509 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1510 | return (SET_ERROR(ENODEV)); |
13fe0198 MA |
1511 | } |
1512 | dsl_dataset_rele(origin, FTAG); | |
1513 | } | |
1514 | dsl_dataset_rele(ds, FTAG); | |
1515 | error = 0; | |
1516 | } | |
1517 | return (error); | |
34dc7c2f BB |
1518 | } |
1519 | ||
34dc7c2f | 1520 | static void |
13fe0198 | 1521 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1522 | { |
13fe0198 MA |
1523 | dmu_recv_begin_arg_t *drba = arg; |
1524 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
47dfff3b | 1525 | objset_t *mos = dp->dp_meta_objset; |
13fe0198 MA |
1526 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; |
1527 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1528 | dsl_dataset_t *ds, *newds; | |
34dc7c2f | 1529 | uint64_t dsobj; |
13fe0198 | 1530 | int error; |
47dfff3b | 1531 | uint64_t crflags = 0; |
13fe0198 | 1532 | |
47dfff3b MA |
1533 | if (drrb->drr_flags & DRR_FLAG_CI_DATA) |
1534 | crflags |= DS_FLAG_CI_DATASET; | |
34dc7c2f | 1535 | |
13fe0198 MA |
1536 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1537 | if (error == 0) { | |
1538 | /* create temporary clone */ | |
19580676 MA |
1539 | dsl_dataset_t *snap = NULL; |
1540 | if (drba->drba_snapobj != 0) { | |
1541 | VERIFY0(dsl_dataset_hold_obj(dp, | |
1542 | drba->drba_snapobj, FTAG, &snap)); | |
1543 | } | |
13fe0198 | 1544 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, |
19580676 | 1545 | snap, crflags, drba->drba_cred, tx); |
6b42ea85 PD |
1546 | if (drba->drba_snapobj != 0) |
1547 | dsl_dataset_rele(snap, FTAG); | |
13fe0198 MA |
1548 | dsl_dataset_rele(ds, FTAG); |
1549 | } else { | |
1550 | dsl_dir_t *dd; | |
1551 | const char *tail; | |
1552 | dsl_dataset_t *origin = NULL; | |
1553 | ||
1554 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
1555 | ||
1556 | if (drba->drba_origin != NULL) { | |
1557 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
1558 | FTAG, &origin)); | |
1559 | } | |
1560 | ||
1561 | /* Create new dataset. */ | |
1562 | dsobj = dsl_dataset_create_sync(dd, | |
1563 | strrchr(tofs, '/') + 1, | |
1564 | origin, crflags, drba->drba_cred, tx); | |
1565 | if (origin != NULL) | |
1566 | dsl_dataset_rele(origin, FTAG); | |
1567 | dsl_dir_rele(dd, FTAG); | |
1568 | drba->drba_cookie->drc_newfs = B_TRUE; | |
1569 | } | |
1570 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); | |
1571 | ||
47dfff3b MA |
1572 | if (drba->drba_cookie->drc_resumable) { |
1573 | uint64_t one = 1; | |
1574 | uint64_t zero = 0; | |
1575 | ||
1576 | dsl_dataset_zapify(newds, tx); | |
1577 | if (drrb->drr_fromguid != 0) { | |
1578 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID, | |
1579 | 8, 1, &drrb->drr_fromguid, tx)); | |
1580 | } | |
1581 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID, | |
1582 | 8, 1, &drrb->drr_toguid, tx)); | |
1583 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME, | |
1584 | 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx)); | |
1585 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT, | |
1586 | 8, 1, &one, tx)); | |
1587 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET, | |
1588 | 8, 1, &zero, tx)); | |
1589 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES, | |
1590 | 8, 1, &zero, tx)); | |
2aa34383 DK |
1591 | if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & |
1592 | DMU_BACKUP_FEATURE_LARGE_BLOCKS) { | |
1593 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_LARGEBLOCK, | |
02730c33 | 1594 | 8, 1, &one, tx)); |
2aa34383 | 1595 | } |
47dfff3b MA |
1596 | if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & |
1597 | DMU_BACKUP_FEATURE_EMBED_DATA) { | |
1598 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, | |
1599 | 8, 1, &one, tx)); | |
1600 | } | |
2aa34383 DK |
1601 | if (DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & |
1602 | DMU_BACKUP_FEATURE_COMPRESSED) { | |
1603 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_COMPRESSOK, | |
1604 | 8, 1, &one, tx)); | |
1605 | } | |
47dfff3b MA |
1606 | } |
1607 | ||
13fe0198 | 1608 | dmu_buf_will_dirty(newds->ds_dbuf, tx); |
d683ddbb | 1609 | dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; |
34dc7c2f | 1610 | |
428870ff BB |
1611 | /* |
1612 | * If we actually created a non-clone, we need to create the | |
1613 | * objset in our new dataset. | |
1614 | */ | |
13fe0198 | 1615 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { |
428870ff | 1616 | (void) dmu_objset_create_impl(dp->dp_spa, |
13fe0198 | 1617 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); |
428870ff | 1618 | } |
34dc7c2f | 1619 | |
13fe0198 | 1620 | drba->drba_cookie->drc_ds = newds; |
428870ff | 1621 | |
13fe0198 | 1622 | spa_history_log_internal_ds(newds, "receive", tx, ""); |
34dc7c2f BB |
1623 | } |
1624 | ||
47dfff3b MA |
1625 | static int |
1626 | dmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx) | |
1627 | { | |
1628 | dmu_recv_begin_arg_t *drba = arg; | |
1629 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1630 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1631 | int error; | |
1632 | uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); | |
1633 | dsl_dataset_t *ds; | |
1634 | const char *tofs = drba->drba_cookie->drc_tofs; | |
47dfff3b MA |
1635 | uint64_t val; |
1636 | ||
eca7b760 IK |
1637 | /* 6 extra bytes for /%recv */ |
1638 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
1639 | ||
47dfff3b MA |
1640 | /* already checked */ |
1641 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
1642 | ASSERT(featureflags & DMU_BACKUP_FEATURE_RESUMING); | |
1643 | ||
1644 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
1645 | DMU_COMPOUNDSTREAM || | |
1646 | drrb->drr_type >= DMU_OST_NUMTYPES) | |
1647 | return (SET_ERROR(EINVAL)); | |
1648 | ||
1649 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
1650 | if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && | |
1651 | spa_version(dp->dp_spa) < SPA_VERSION_SA) | |
1652 | return (SET_ERROR(ENOTSUP)); | |
1653 | ||
1654 | /* | |
1655 | * The receiving code doesn't know how to translate a WRITE_EMBEDDED | |
1656 | * record to a plain WRITE record, so the pool must have the | |
1657 | * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED | |
1658 | * records. Same with WRITE_EMBEDDED records that use LZ4 compression. | |
1659 | */ | |
1660 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && | |
1661 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) | |
1662 | return (SET_ERROR(ENOTSUP)); | |
2aa34383 | 1663 | if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && |
47dfff3b MA |
1664 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) |
1665 | return (SET_ERROR(ENOTSUP)); | |
1666 | ||
1667 | (void) snprintf(recvname, sizeof (recvname), "%s/%s", | |
1668 | tofs, recv_clone_name); | |
1669 | ||
1670 | if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { | |
1671 | /* %recv does not exist; continue in tofs */ | |
1672 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); | |
1673 | if (error != 0) | |
1674 | return (error); | |
1675 | } | |
1676 | ||
1677 | /* check that ds is marked inconsistent */ | |
1678 | if (!DS_IS_INCONSISTENT(ds)) { | |
1679 | dsl_dataset_rele(ds, FTAG); | |
1680 | return (SET_ERROR(EINVAL)); | |
1681 | } | |
1682 | ||
1683 | /* check that there is resuming data, and that the toguid matches */ | |
1684 | if (!dsl_dataset_is_zapified(ds)) { | |
1685 | dsl_dataset_rele(ds, FTAG); | |
1686 | return (SET_ERROR(EINVAL)); | |
1687 | } | |
1688 | error = zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1689 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val); | |
1690 | if (error != 0 || drrb->drr_toguid != val) { | |
1691 | dsl_dataset_rele(ds, FTAG); | |
1692 | return (SET_ERROR(EINVAL)); | |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * Check if the receive is still running. If so, it will be owned. | |
1697 | * Note that nothing else can own the dataset (e.g. after the receive | |
1698 | * fails) because it will be marked inconsistent. | |
1699 | */ | |
1700 | if (dsl_dataset_has_owner(ds)) { | |
1701 | dsl_dataset_rele(ds, FTAG); | |
1702 | return (SET_ERROR(EBUSY)); | |
1703 | } | |
1704 | ||
1705 | /* There should not be any snapshots of this fs yet. */ | |
1706 | if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) { | |
1707 | dsl_dataset_rele(ds, FTAG); | |
1708 | return (SET_ERROR(EINVAL)); | |
1709 | } | |
1710 | ||
1711 | /* | |
1712 | * Note: resume point will be checked when we process the first WRITE | |
1713 | * record. | |
1714 | */ | |
1715 | ||
1716 | /* check that the origin matches */ | |
1717 | val = 0; | |
1718 | (void) zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1719 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val); | |
1720 | if (drrb->drr_fromguid != val) { | |
1721 | dsl_dataset_rele(ds, FTAG); | |
1722 | return (SET_ERROR(EINVAL)); | |
1723 | } | |
1724 | ||
1725 | dsl_dataset_rele(ds, FTAG); | |
1726 | return (0); | |
1727 | } | |
1728 | ||
1729 | static void | |
1730 | dmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx) | |
1731 | { | |
1732 | dmu_recv_begin_arg_t *drba = arg; | |
1733 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1734 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1735 | dsl_dataset_t *ds; | |
1736 | uint64_t dsobj; | |
eca7b760 IK |
1737 | /* 6 extra bytes for /%recv */ |
1738 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
47dfff3b MA |
1739 | |
1740 | (void) snprintf(recvname, sizeof (recvname), "%s/%s", | |
1741 | tofs, recv_clone_name); | |
1742 | ||
1743 | if (dsl_dataset_hold(dp, recvname, FTAG, &ds) != 0) { | |
1744 | /* %recv does not exist; continue in tofs */ | |
1745 | VERIFY0(dsl_dataset_hold(dp, tofs, FTAG, &ds)); | |
1746 | drba->drba_cookie->drc_newfs = B_TRUE; | |
1747 | } | |
1748 | ||
1749 | /* clear the inconsistent flag so that we can own it */ | |
1750 | ASSERT(DS_IS_INCONSISTENT(ds)); | |
1751 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1752 | dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1753 | dsobj = ds->ds_object; | |
1754 | dsl_dataset_rele(ds, FTAG); | |
1755 | ||
1756 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &ds)); | |
1757 | ||
1758 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
1759 | dsl_dataset_phys(ds)->ds_flags |= DS_FLAG_INCONSISTENT; | |
1760 | ||
1761 | ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds))); | |
1762 | ||
1763 | drba->drba_cookie->drc_ds = ds; | |
1764 | ||
1765 | spa_history_log_internal_ds(ds, "resume receive", tx, ""); | |
1766 | } | |
1767 | ||
34dc7c2f BB |
1768 | /* |
1769 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
1770 | * succeeds; otherwise we will leak the holds on the datasets. | |
1771 | */ | |
1772 | int | |
47dfff3b MA |
1773 | dmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, |
1774 | boolean_t force, boolean_t resumable, char *origin, dmu_recv_cookie_t *drc) | |
34dc7c2f | 1775 | { |
13fe0198 | 1776 | dmu_recv_begin_arg_t drba = { 0 }; |
34dc7c2f BB |
1777 | |
1778 | bzero(drc, sizeof (dmu_recv_cookie_t)); | |
47dfff3b MA |
1779 | drc->drc_drr_begin = drr_begin; |
1780 | drc->drc_drrb = &drr_begin->drr_u.drr_begin; | |
34dc7c2f | 1781 | drc->drc_tosnap = tosnap; |
13fe0198 | 1782 | drc->drc_tofs = tofs; |
34dc7c2f | 1783 | drc->drc_force = force; |
47dfff3b | 1784 | drc->drc_resumable = resumable; |
788eb90c | 1785 | drc->drc_cred = CRED(); |
34dc7c2f | 1786 | |
47dfff3b | 1787 | if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { |
13fe0198 | 1788 | drc->drc_byteswap = B_TRUE; |
a6255b7f | 1789 | (void) fletcher_4_incremental_byteswap(drr_begin, |
13fe0198 | 1790 | sizeof (dmu_replay_record_t), &drc->drc_cksum); |
47dfff3b MA |
1791 | byteswap_record(drr_begin); |
1792 | } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { | |
a6255b7f | 1793 | (void) fletcher_4_incremental_native(drr_begin, |
13fe0198 | 1794 | sizeof (dmu_replay_record_t), &drc->drc_cksum); |
47dfff3b MA |
1795 | } else { |
1796 | return (SET_ERROR(EINVAL)); | |
34dc7c2f BB |
1797 | } |
1798 | ||
13fe0198 MA |
1799 | drba.drba_origin = origin; |
1800 | drba.drba_cookie = drc; | |
1801 | drba.drba_cred = CRED(); | |
1802 | ||
47dfff3b MA |
1803 | if (DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & |
1804 | DMU_BACKUP_FEATURE_RESUMING) { | |
1805 | return (dsl_sync_task(tofs, | |
1806 | dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync, | |
1807 | &drba, 5, ZFS_SPACE_CHECK_NORMAL)); | |
1808 | } else { | |
1809 | return (dsl_sync_task(tofs, | |
1810 | dmu_recv_begin_check, dmu_recv_begin_sync, | |
1811 | &drba, 5, ZFS_SPACE_CHECK_NORMAL)); | |
1812 | } | |
34dc7c2f BB |
1813 | } |
1814 | ||
fcff0f35 PD |
1815 | struct receive_record_arg { |
1816 | dmu_replay_record_t header; | |
1817 | void *payload; /* Pointer to a buffer containing the payload */ | |
1818 | /* | |
1819 | * If the record is a write, pointer to the arc_buf_t containing the | |
1820 | * payload. | |
1821 | */ | |
1822 | arc_buf_t *write_buf; | |
1823 | int payload_size; | |
47dfff3b | 1824 | uint64_t bytes_read; /* bytes read from stream when record created */ |
fcff0f35 PD |
1825 | boolean_t eos_marker; /* Marks the end of the stream */ |
1826 | bqueue_node_t node; | |
1827 | }; | |
1828 | ||
1829 | struct receive_writer_arg { | |
37f8a883 | 1830 | objset_t *os; |
13fe0198 | 1831 | boolean_t byteswap; |
fcff0f35 | 1832 | bqueue_t q; |
47dfff3b | 1833 | |
fcff0f35 PD |
1834 | /* |
1835 | * These three args are used to signal to the main thread that we're | |
1836 | * done. | |
1837 | */ | |
1838 | kmutex_t mutex; | |
1839 | kcondvar_t cv; | |
1840 | boolean_t done; | |
47dfff3b | 1841 | |
fcff0f35 PD |
1842 | int err; |
1843 | /* A map from guid to dataset to help handle dedup'd streams. */ | |
1844 | avl_tree_t *guid_to_ds_map; | |
47dfff3b MA |
1845 | boolean_t resumable; |
1846 | uint64_t last_object, last_offset; | |
1847 | uint64_t bytes_read; /* bytes read when current record created */ | |
fcff0f35 | 1848 | }; |
37f8a883 | 1849 | |
e6d3a843 PD |
1850 | struct objlist { |
1851 | list_t list; /* List of struct receive_objnode. */ | |
1852 | /* | |
1853 | * Last object looked up. Used to assert that objects are being looked | |
1854 | * up in ascending order. | |
1855 | */ | |
1856 | uint64_t last_lookup; | |
1857 | }; | |
1858 | ||
1859 | struct receive_objnode { | |
1860 | list_node_t node; | |
1861 | uint64_t object; | |
1862 | }; | |
1863 | ||
fcff0f35 PD |
1864 | struct receive_arg { |
1865 | objset_t *os; | |
1866 | vnode_t *vp; /* The vnode to read the stream from */ | |
1867 | uint64_t voff; /* The current offset in the stream */ | |
47dfff3b | 1868 | uint64_t bytes_read; |
fcff0f35 PD |
1869 | /* |
1870 | * A record that has had its payload read in, but hasn't yet been handed | |
1871 | * off to the worker thread. | |
1872 | */ | |
1873 | struct receive_record_arg *rrd; | |
1874 | /* A record that has had its header read in, but not its payload. */ | |
1875 | struct receive_record_arg *next_rrd; | |
34dc7c2f | 1876 | zio_cksum_t cksum; |
37f8a883 | 1877 | zio_cksum_t prev_cksum; |
fcff0f35 PD |
1878 | int err; |
1879 | boolean_t byteswap; | |
1880 | /* Sorted list of objects not to issue prefetches for. */ | |
e6d3a843 | 1881 | struct objlist ignore_objlist; |
34dc7c2f BB |
1882 | }; |
1883 | ||
428870ff BB |
1884 | typedef struct guid_map_entry { |
1885 | uint64_t guid; | |
1886 | dsl_dataset_t *gme_ds; | |
1887 | avl_node_t avlnode; | |
1888 | } guid_map_entry_t; | |
1889 | ||
1890 | static int | |
1891 | guid_compare(const void *arg1, const void *arg2) | |
1892 | { | |
ee36c709 GN |
1893 | const guid_map_entry_t *gmep1 = (const guid_map_entry_t *)arg1; |
1894 | const guid_map_entry_t *gmep2 = (const guid_map_entry_t *)arg2; | |
428870ff | 1895 | |
ee36c709 | 1896 | return (AVL_CMP(gmep1->guid, gmep2->guid)); |
428870ff BB |
1897 | } |
1898 | ||
572e2857 BB |
1899 | static void |
1900 | free_guid_map_onexit(void *arg) | |
1901 | { | |
1902 | avl_tree_t *ca = arg; | |
1903 | void *cookie = NULL; | |
1904 | guid_map_entry_t *gmep; | |
1905 | ||
1906 | while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { | |
13fe0198 | 1907 | dsl_dataset_long_rele(gmep->gme_ds, gmep); |
7ec09286 | 1908 | dsl_dataset_rele(gmep->gme_ds, gmep); |
572e2857 BB |
1909 | kmem_free(gmep, sizeof (guid_map_entry_t)); |
1910 | } | |
1911 | avl_destroy(ca); | |
1912 | kmem_free(ca, sizeof (avl_tree_t)); | |
1913 | } | |
1914 | ||
37f8a883 | 1915 | static int |
fcff0f35 | 1916 | receive_read(struct receive_arg *ra, int len, void *buf) |
34dc7c2f | 1917 | { |
34dc7c2f BB |
1918 | int done = 0; |
1919 | ||
f8866f8a ER |
1920 | /* |
1921 | * The code doesn't rely on this (lengths being multiples of 8). See | |
1922 | * comment in dump_bytes. | |
1923 | */ | |
c99c9001 | 1924 | ASSERT0(len % 8); |
34dc7c2f BB |
1925 | |
1926 | while (done < len) { | |
1927 | ssize_t resid; | |
1928 | ||
1929 | ra->err = vn_rdwr(UIO_READ, ra->vp, | |
37f8a883 | 1930 | (char *)buf + done, len - done, |
34dc7c2f BB |
1931 | ra->voff, UIO_SYSSPACE, FAPPEND, |
1932 | RLIM64_INFINITY, CRED(), &resid); | |
1933 | ||
47dfff3b MA |
1934 | if (resid == len - done) { |
1935 | /* | |
1936 | * Note: ECKSUM indicates that the receive | |
1937 | * was interrupted and can potentially be resumed. | |
1938 | */ | |
1939 | ra->err = SET_ERROR(ECKSUM); | |
1940 | } | |
34dc7c2f BB |
1941 | ra->voff += len - done - resid; |
1942 | done = len - resid; | |
13fe0198 | 1943 | if (ra->err != 0) |
37f8a883 | 1944 | return (ra->err); |
34dc7c2f BB |
1945 | } |
1946 | ||
47dfff3b MA |
1947 | ra->bytes_read += len; |
1948 | ||
34dc7c2f | 1949 | ASSERT3U(done, ==, len); |
37f8a883 | 1950 | return (0); |
34dc7c2f BB |
1951 | } |
1952 | ||
60948de1 | 1953 | noinline static void |
37f8a883 | 1954 | byteswap_record(dmu_replay_record_t *drr) |
34dc7c2f BB |
1955 | { |
1956 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
1957 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
1958 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1959 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
37f8a883 | 1960 | |
34dc7c2f BB |
1961 | switch (drr->drr_type) { |
1962 | case DRR_BEGIN: | |
1963 | DO64(drr_begin.drr_magic); | |
428870ff | 1964 | DO64(drr_begin.drr_versioninfo); |
34dc7c2f BB |
1965 | DO64(drr_begin.drr_creation_time); |
1966 | DO32(drr_begin.drr_type); | |
1967 | DO32(drr_begin.drr_flags); | |
1968 | DO64(drr_begin.drr_toguid); | |
1969 | DO64(drr_begin.drr_fromguid); | |
1970 | break; | |
1971 | case DRR_OBJECT: | |
1972 | DO64(drr_object.drr_object); | |
34dc7c2f BB |
1973 | DO32(drr_object.drr_type); |
1974 | DO32(drr_object.drr_bonustype); | |
1975 | DO32(drr_object.drr_blksz); | |
1976 | DO32(drr_object.drr_bonuslen); | |
428870ff | 1977 | DO64(drr_object.drr_toguid); |
34dc7c2f BB |
1978 | break; |
1979 | case DRR_FREEOBJECTS: | |
1980 | DO64(drr_freeobjects.drr_firstobj); | |
1981 | DO64(drr_freeobjects.drr_numobjs); | |
428870ff | 1982 | DO64(drr_freeobjects.drr_toguid); |
34dc7c2f BB |
1983 | break; |
1984 | case DRR_WRITE: | |
1985 | DO64(drr_write.drr_object); | |
1986 | DO32(drr_write.drr_type); | |
1987 | DO64(drr_write.drr_offset); | |
2aa34383 | 1988 | DO64(drr_write.drr_logical_size); |
428870ff | 1989 | DO64(drr_write.drr_toguid); |
37f8a883 | 1990 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); |
428870ff | 1991 | DO64(drr_write.drr_key.ddk_prop); |
2aa34383 | 1992 | DO64(drr_write.drr_compressed_size); |
428870ff BB |
1993 | break; |
1994 | case DRR_WRITE_BYREF: | |
1995 | DO64(drr_write_byref.drr_object); | |
1996 | DO64(drr_write_byref.drr_offset); | |
1997 | DO64(drr_write_byref.drr_length); | |
1998 | DO64(drr_write_byref.drr_toguid); | |
1999 | DO64(drr_write_byref.drr_refguid); | |
2000 | DO64(drr_write_byref.drr_refobject); | |
2001 | DO64(drr_write_byref.drr_refoffset); | |
37f8a883 MA |
2002 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. |
2003 | drr_key.ddk_cksum); | |
428870ff | 2004 | DO64(drr_write_byref.drr_key.ddk_prop); |
34dc7c2f | 2005 | break; |
9b67f605 MA |
2006 | case DRR_WRITE_EMBEDDED: |
2007 | DO64(drr_write_embedded.drr_object); | |
2008 | DO64(drr_write_embedded.drr_offset); | |
2009 | DO64(drr_write_embedded.drr_length); | |
2010 | DO64(drr_write_embedded.drr_toguid); | |
2011 | DO32(drr_write_embedded.drr_lsize); | |
2012 | DO32(drr_write_embedded.drr_psize); | |
2013 | break; | |
34dc7c2f BB |
2014 | case DRR_FREE: |
2015 | DO64(drr_free.drr_object); | |
2016 | DO64(drr_free.drr_offset); | |
2017 | DO64(drr_free.drr_length); | |
428870ff BB |
2018 | DO64(drr_free.drr_toguid); |
2019 | break; | |
2020 | case DRR_SPILL: | |
2021 | DO64(drr_spill.drr_object); | |
2022 | DO64(drr_spill.drr_length); | |
2023 | DO64(drr_spill.drr_toguid); | |
34dc7c2f BB |
2024 | break; |
2025 | case DRR_END: | |
428870ff | 2026 | DO64(drr_end.drr_toguid); |
37f8a883 | 2027 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); |
34dc7c2f | 2028 | break; |
e75c13c3 BB |
2029 | default: |
2030 | break; | |
34dc7c2f | 2031 | } |
37f8a883 MA |
2032 | |
2033 | if (drr->drr_type != DRR_BEGIN) { | |
2034 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); | |
2035 | } | |
2036 | ||
34dc7c2f BB |
2037 | #undef DO64 |
2038 | #undef DO32 | |
2039 | } | |
2040 | ||
6c59307a MA |
2041 | static inline uint8_t |
2042 | deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) | |
2043 | { | |
2044 | if (bonus_type == DMU_OT_SA) { | |
2045 | return (1); | |
2046 | } else { | |
2047 | return (1 + | |
50c957f7 NB |
2048 | ((DN_OLD_MAX_BONUSLEN - |
2049 | MIN(DN_OLD_MAX_BONUSLEN, bonus_size)) >> SPA_BLKPTRSHIFT)); | |
6c59307a MA |
2050 | } |
2051 | } | |
2052 | ||
47dfff3b MA |
2053 | static void |
2054 | save_resume_state(struct receive_writer_arg *rwa, | |
2055 | uint64_t object, uint64_t offset, dmu_tx_t *tx) | |
2056 | { | |
2057 | int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; | |
2058 | ||
2059 | if (!rwa->resumable) | |
2060 | return; | |
2061 | ||
2062 | /* | |
2063 | * We use ds_resume_bytes[] != 0 to indicate that we need to | |
2064 | * update this on disk, so it must not be 0. | |
2065 | */ | |
2066 | ASSERT(rwa->bytes_read != 0); | |
2067 | ||
2068 | /* | |
2069 | * We only resume from write records, which have a valid | |
2070 | * (non-meta-dnode) object number. | |
2071 | */ | |
2072 | ASSERT(object != 0); | |
2073 | ||
2074 | /* | |
2075 | * For resuming to work correctly, we must receive records in order, | |
2076 | * sorted by object,offset. This is checked by the callers, but | |
2077 | * assert it here for good measure. | |
2078 | */ | |
2079 | ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]); | |
2080 | ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] || | |
2081 | offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]); | |
2082 | ASSERT3U(rwa->bytes_read, >=, | |
2083 | rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]); | |
2084 | ||
2085 | rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object; | |
2086 | rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset; | |
2087 | rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read; | |
2088 | } | |
2089 | ||
60948de1 | 2090 | noinline static int |
fcff0f35 PD |
2091 | receive_object(struct receive_writer_arg *rwa, struct drr_object *drro, |
2092 | void *data) | |
34dc7c2f | 2093 | { |
6c59307a | 2094 | dmu_object_info_t doi; |
34dc7c2f | 2095 | dmu_tx_t *tx; |
6c59307a MA |
2096 | uint64_t object; |
2097 | int err; | |
34dc7c2f | 2098 | |
34dc7c2f | 2099 | if (drro->drr_type == DMU_OT_NONE || |
9ae529ec CS |
2100 | !DMU_OT_IS_VALID(drro->drr_type) || |
2101 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
428870ff | 2102 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || |
34dc7c2f BB |
2103 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || |
2104 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
2105 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
fcff0f35 | 2106 | drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || |
50c957f7 NB |
2107 | drro->drr_bonuslen > |
2108 | DN_BONUS_SIZE(spa_maxdnodesize(dmu_objset_spa(rwa->os)))) { | |
2e528b49 | 2109 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
2110 | } |
2111 | ||
fcff0f35 | 2112 | err = dmu_object_info(rwa->os, drro->drr_object, &doi); |
9babb374 BB |
2113 | |
2114 | if (err != 0 && err != ENOENT) | |
2e528b49 | 2115 | return (SET_ERROR(EINVAL)); |
6c59307a | 2116 | object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; |
9babb374 | 2117 | |
6c59307a MA |
2118 | /* |
2119 | * If we are losing blkptrs or changing the block size this must | |
2120 | * be a new file instance. We must clear out the previous file | |
2121 | * contents before we can change this type of metadata in the dnode. | |
2122 | */ | |
2123 | if (err == 0) { | |
2124 | int nblkptr; | |
2125 | ||
2126 | nblkptr = deduce_nblkptr(drro->drr_bonustype, | |
2127 | drro->drr_bonuslen); | |
2128 | ||
2129 | if (drro->drr_blksz != doi.doi_data_block_size || | |
2130 | nblkptr < doi.doi_nblkptr) { | |
fcff0f35 | 2131 | err = dmu_free_long_range(rwa->os, drro->drr_object, |
6c59307a MA |
2132 | 0, DMU_OBJECT_END); |
2133 | if (err != 0) | |
2134 | return (SET_ERROR(EINVAL)); | |
34dc7c2f | 2135 | } |
6c59307a MA |
2136 | } |
2137 | ||
fcff0f35 | 2138 | tx = dmu_tx_create(rwa->os); |
6c59307a MA |
2139 | dmu_tx_hold_bonus(tx, object); |
2140 | err = dmu_tx_assign(tx, TXG_WAIT); | |
2141 | if (err != 0) { | |
2142 | dmu_tx_abort(tx); | |
2143 | return (err); | |
2144 | } | |
2145 | ||
2146 | if (object == DMU_NEW_OBJECT) { | |
2147 | /* currently free, want to be allocated */ | |
50c957f7 | 2148 | err = dmu_object_claim_dnsize(rwa->os, drro->drr_object, |
34dc7c2f | 2149 | drro->drr_type, drro->drr_blksz, |
50c957f7 NB |
2150 | drro->drr_bonustype, drro->drr_bonuslen, |
2151 | drro->drr_dn_slots << DNODE_SHIFT, tx); | |
6c59307a MA |
2152 | } else if (drro->drr_type != doi.doi_type || |
2153 | drro->drr_blksz != doi.doi_data_block_size || | |
2154 | drro->drr_bonustype != doi.doi_bonus_type || | |
2155 | drro->drr_bonuslen != doi.doi_bonus_size) { | |
2156 | /* currently allocated, but with different properties */ | |
fcff0f35 | 2157 | err = dmu_object_reclaim(rwa->os, drro->drr_object, |
34dc7c2f | 2158 | drro->drr_type, drro->drr_blksz, |
6c59307a | 2159 | drro->drr_bonustype, drro->drr_bonuslen, tx); |
34dc7c2f | 2160 | } |
13fe0198 | 2161 | if (err != 0) { |
6c59307a | 2162 | dmu_tx_commit(tx); |
2e528b49 | 2163 | return (SET_ERROR(EINVAL)); |
428870ff | 2164 | } |
9babb374 | 2165 | |
fcff0f35 | 2166 | dmu_object_set_checksum(rwa->os, drro->drr_object, |
37f8a883 | 2167 | drro->drr_checksumtype, tx); |
fcff0f35 | 2168 | dmu_object_set_compress(rwa->os, drro->drr_object, |
37f8a883 | 2169 | drro->drr_compress, tx); |
34dc7c2f | 2170 | |
b128c09f | 2171 | if (data != NULL) { |
34dc7c2f | 2172 | dmu_buf_t *db; |
b128c09f | 2173 | |
fcff0f35 | 2174 | VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db)); |
34dc7c2f BB |
2175 | dmu_buf_will_dirty(db, tx); |
2176 | ||
2177 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
34dc7c2f | 2178 | bcopy(data, db->db_data, drro->drr_bonuslen); |
fcff0f35 | 2179 | if (rwa->byteswap) { |
9ae529ec CS |
2180 | dmu_object_byteswap_t byteswap = |
2181 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
2182 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
34dc7c2f BB |
2183 | drro->drr_bonuslen); |
2184 | } | |
2185 | dmu_buf_rele(db, FTAG); | |
2186 | } | |
2187 | dmu_tx_commit(tx); | |
47dfff3b | 2188 | |
34dc7c2f BB |
2189 | return (0); |
2190 | } | |
2191 | ||
2192 | /* ARGSUSED */ | |
60948de1 | 2193 | noinline static int |
fcff0f35 | 2194 | receive_freeobjects(struct receive_writer_arg *rwa, |
34dc7c2f BB |
2195 | struct drr_freeobjects *drrfo) |
2196 | { | |
2197 | uint64_t obj; | |
e6d3a843 | 2198 | int next_err = 0; |
34dc7c2f BB |
2199 | |
2200 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
2e528b49 | 2201 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2202 | |
50c957f7 | 2203 | for (obj = drrfo->drr_firstobj == 0 ? 1 : drrfo->drr_firstobj; |
e6d3a843 PD |
2204 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs && next_err == 0; |
2205 | next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) { | |
50c957f7 | 2206 | dmu_object_info_t doi; |
34dc7c2f BB |
2207 | int err; |
2208 | ||
50c957f7 NB |
2209 | err = dmu_object_info(rwa->os, obj, &doi); |
2210 | if (err == ENOENT) { | |
2211 | obj++; | |
34dc7c2f | 2212 | continue; |
50c957f7 NB |
2213 | } else if (err != 0) { |
2214 | return (err); | |
2215 | } | |
34dc7c2f | 2216 | |
fcff0f35 | 2217 | err = dmu_free_long_object(rwa->os, obj); |
13fe0198 | 2218 | if (err != 0) |
34dc7c2f | 2219 | return (err); |
34dc7c2f | 2220 | } |
e6d3a843 PD |
2221 | if (next_err != ESRCH) |
2222 | return (next_err); | |
34dc7c2f BB |
2223 | return (0); |
2224 | } | |
2225 | ||
60948de1 | 2226 | noinline static int |
fcff0f35 PD |
2227 | receive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, |
2228 | arc_buf_t *abuf) | |
34dc7c2f BB |
2229 | { |
2230 | dmu_tx_t *tx; | |
88904bb3 | 2231 | dmu_buf_t *bonus; |
34dc7c2f BB |
2232 | int err; |
2233 | ||
2aa34383 | 2234 | if (drrw->drr_offset + drrw->drr_logical_size < drrw->drr_offset || |
9ae529ec | 2235 | !DMU_OT_IS_VALID(drrw->drr_type)) |
2e528b49 | 2236 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2237 | |
47dfff3b MA |
2238 | /* |
2239 | * For resuming to work, records must be in increasing order | |
2240 | * by (object, offset). | |
2241 | */ | |
2242 | if (drrw->drr_object < rwa->last_object || | |
2243 | (drrw->drr_object == rwa->last_object && | |
2244 | drrw->drr_offset < rwa->last_offset)) { | |
2245 | return (SET_ERROR(EINVAL)); | |
2246 | } | |
2247 | rwa->last_object = drrw->drr_object; | |
2248 | rwa->last_offset = drrw->drr_offset; | |
2249 | ||
fcff0f35 | 2250 | if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) |
88904bb3 MA |
2251 | return (SET_ERROR(EINVAL)); |
2252 | ||
fcff0f35 | 2253 | tx = dmu_tx_create(rwa->os); |
34dc7c2f BB |
2254 | |
2255 | dmu_tx_hold_write(tx, drrw->drr_object, | |
2aa34383 | 2256 | drrw->drr_offset, drrw->drr_logical_size); |
34dc7c2f | 2257 | err = dmu_tx_assign(tx, TXG_WAIT); |
13fe0198 | 2258 | if (err != 0) { |
34dc7c2f BB |
2259 | dmu_tx_abort(tx); |
2260 | return (err); | |
2261 | } | |
fcff0f35 | 2262 | if (rwa->byteswap) { |
9ae529ec CS |
2263 | dmu_object_byteswap_t byteswap = |
2264 | DMU_OT_BYTESWAP(drrw->drr_type); | |
37f8a883 | 2265 | dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, |
2aa34383 | 2266 | DRR_WRITE_PAYLOAD_SIZE(drrw)); |
9ae529ec | 2267 | } |
37f8a883 | 2268 | |
2aa34383 | 2269 | /* use the bonus buf to look up the dnode in dmu_assign_arcbuf */ |
fcff0f35 | 2270 | if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) |
37f8a883 | 2271 | return (SET_ERROR(EINVAL)); |
88904bb3 | 2272 | dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); |
47dfff3b MA |
2273 | |
2274 | /* | |
2275 | * Note: If the receive fails, we want the resume stream to start | |
2276 | * with the same record that we last successfully received (as opposed | |
2277 | * to the next record), so that we can verify that we are | |
2278 | * resuming from the correct location. | |
2279 | */ | |
2280 | save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx); | |
34dc7c2f | 2281 | dmu_tx_commit(tx); |
88904bb3 | 2282 | dmu_buf_rele(bonus, FTAG); |
47dfff3b | 2283 | |
34dc7c2f BB |
2284 | return (0); |
2285 | } | |
2286 | ||
428870ff BB |
2287 | /* |
2288 | * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed | |
2289 | * streams to refer to a copy of the data that is already on the | |
2290 | * system because it came in earlier in the stream. This function | |
2291 | * finds the earlier copy of the data, and uses that copy instead of | |
2292 | * data from the stream to fulfill this write. | |
2293 | */ | |
2294 | static int | |
fcff0f35 PD |
2295 | receive_write_byref(struct receive_writer_arg *rwa, |
2296 | struct drr_write_byref *drrwbr) | |
428870ff BB |
2297 | { |
2298 | dmu_tx_t *tx; | |
2299 | int err; | |
2300 | guid_map_entry_t gmesrch; | |
2301 | guid_map_entry_t *gmep; | |
9b67f605 | 2302 | avl_index_t where; |
428870ff BB |
2303 | objset_t *ref_os = NULL; |
2304 | dmu_buf_t *dbp; | |
2305 | ||
2306 | if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) | |
2e528b49 | 2307 | return (SET_ERROR(EINVAL)); |
428870ff BB |
2308 | |
2309 | /* | |
2310 | * If the GUID of the referenced dataset is different from the | |
2311 | * GUID of the target dataset, find the referenced dataset. | |
2312 | */ | |
2313 | if (drrwbr->drr_toguid != drrwbr->drr_refguid) { | |
2314 | gmesrch.guid = drrwbr->drr_refguid; | |
fcff0f35 | 2315 | if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, |
428870ff | 2316 | &where)) == NULL) { |
2e528b49 | 2317 | return (SET_ERROR(EINVAL)); |
428870ff BB |
2318 | } |
2319 | if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) | |
2e528b49 | 2320 | return (SET_ERROR(EINVAL)); |
428870ff | 2321 | } else { |
fcff0f35 | 2322 | ref_os = rwa->os; |
428870ff BB |
2323 | } |
2324 | ||
c65aa5b2 BB |
2325 | err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, |
2326 | drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); | |
9b67f605 | 2327 | if (err != 0) |
428870ff BB |
2328 | return (err); |
2329 | ||
fcff0f35 | 2330 | tx = dmu_tx_create(rwa->os); |
428870ff BB |
2331 | |
2332 | dmu_tx_hold_write(tx, drrwbr->drr_object, | |
2333 | drrwbr->drr_offset, drrwbr->drr_length); | |
2334 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 2335 | if (err != 0) { |
428870ff BB |
2336 | dmu_tx_abort(tx); |
2337 | return (err); | |
2338 | } | |
fcff0f35 | 2339 | dmu_write(rwa->os, drrwbr->drr_object, |
428870ff BB |
2340 | drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); |
2341 | dmu_buf_rele(dbp, FTAG); | |
47dfff3b MA |
2342 | |
2343 | /* See comment in restore_write. */ | |
2344 | save_resume_state(rwa, drrwbr->drr_object, drrwbr->drr_offset, tx); | |
428870ff BB |
2345 | dmu_tx_commit(tx); |
2346 | return (0); | |
2347 | } | |
2348 | ||
9b67f605 | 2349 | static int |
fcff0f35 | 2350 | receive_write_embedded(struct receive_writer_arg *rwa, |
47dfff3b | 2351 | struct drr_write_embedded *drrwe, void *data) |
9b67f605 MA |
2352 | { |
2353 | dmu_tx_t *tx; | |
2354 | int err; | |
9b67f605 | 2355 | |
47dfff3b | 2356 | if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) |
9b67f605 MA |
2357 | return (EINVAL); |
2358 | ||
47dfff3b | 2359 | if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) |
9b67f605 MA |
2360 | return (EINVAL); |
2361 | ||
47dfff3b | 2362 | if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) |
9b67f605 | 2363 | return (EINVAL); |
47dfff3b | 2364 | if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) |
9b67f605 MA |
2365 | return (EINVAL); |
2366 | ||
fcff0f35 | 2367 | tx = dmu_tx_create(rwa->os); |
9b67f605 | 2368 | |
47dfff3b MA |
2369 | dmu_tx_hold_write(tx, drrwe->drr_object, |
2370 | drrwe->drr_offset, drrwe->drr_length); | |
9b67f605 MA |
2371 | err = dmu_tx_assign(tx, TXG_WAIT); |
2372 | if (err != 0) { | |
2373 | dmu_tx_abort(tx); | |
2374 | return (err); | |
2375 | } | |
2376 | ||
47dfff3b MA |
2377 | dmu_write_embedded(rwa->os, drrwe->drr_object, |
2378 | drrwe->drr_offset, data, drrwe->drr_etype, | |
2379 | drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize, | |
fcff0f35 | 2380 | rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); |
9b67f605 | 2381 | |
47dfff3b MA |
2382 | /* See comment in restore_write. */ |
2383 | save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx); | |
9b67f605 MA |
2384 | dmu_tx_commit(tx); |
2385 | return (0); | |
2386 | } | |
2387 | ||
428870ff | 2388 | static int |
fcff0f35 PD |
2389 | receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, |
2390 | void *data) | |
428870ff BB |
2391 | { |
2392 | dmu_tx_t *tx; | |
428870ff BB |
2393 | dmu_buf_t *db, *db_spill; |
2394 | int err; | |
2395 | ||
2396 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
fcff0f35 | 2397 | drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) |
2e528b49 | 2398 | return (SET_ERROR(EINVAL)); |
428870ff | 2399 | |
fcff0f35 | 2400 | if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) |
2e528b49 | 2401 | return (SET_ERROR(EINVAL)); |
428870ff | 2402 | |
fcff0f35 | 2403 | VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); |
428870ff BB |
2404 | if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { |
2405 | dmu_buf_rele(db, FTAG); | |
2406 | return (err); | |
2407 | } | |
2408 | ||
fcff0f35 | 2409 | tx = dmu_tx_create(rwa->os); |
428870ff BB |
2410 | |
2411 | dmu_tx_hold_spill(tx, db->db_object); | |
2412 | ||
2413 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 2414 | if (err != 0) { |
428870ff BB |
2415 | dmu_buf_rele(db, FTAG); |
2416 | dmu_buf_rele(db_spill, FTAG); | |
2417 | dmu_tx_abort(tx); | |
2418 | return (err); | |
2419 | } | |
2420 | dmu_buf_will_dirty(db_spill, tx); | |
2421 | ||
2422 | if (db_spill->db_size < drrs->drr_length) | |
2423 | VERIFY(0 == dbuf_spill_set_blksz(db_spill, | |
2424 | drrs->drr_length, tx)); | |
2425 | bcopy(data, db_spill->db_data, drrs->drr_length); | |
2426 | ||
2427 | dmu_buf_rele(db, FTAG); | |
2428 | dmu_buf_rele(db_spill, FTAG); | |
2429 | ||
2430 | dmu_tx_commit(tx); | |
2431 | return (0); | |
2432 | } | |
2433 | ||
34dc7c2f | 2434 | /* ARGSUSED */ |
60948de1 | 2435 | noinline static int |
fcff0f35 | 2436 | receive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) |
34dc7c2f | 2437 | { |
34dc7c2f BB |
2438 | int err; |
2439 | ||
2440 | if (drrf->drr_length != -1ULL && | |
2441 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) | |
2e528b49 | 2442 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2443 | |
fcff0f35 | 2444 | if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) |
2e528b49 | 2445 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 2446 | |
fcff0f35 | 2447 | err = dmu_free_long_range(rwa->os, drrf->drr_object, |
34dc7c2f | 2448 | drrf->drr_offset, drrf->drr_length); |
fcff0f35 | 2449 | |
34dc7c2f BB |
2450 | return (err); |
2451 | } | |
2452 | ||
13fe0198 MA |
2453 | /* used to destroy the drc_ds on error */ |
2454 | static void | |
2455 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
2456 | { | |
47dfff3b MA |
2457 | if (drc->drc_resumable) { |
2458 | /* wait for our resume state to be written to disk */ | |
2459 | txg_wait_synced(drc->drc_ds->ds_dir->dd_pool, 0); | |
2460 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
2461 | } else { | |
eca7b760 | 2462 | char name[ZFS_MAX_DATASET_NAME_LEN]; |
47dfff3b MA |
2463 | dsl_dataset_name(drc->drc_ds, name); |
2464 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
2465 | (void) dsl_destroy_head(name); | |
2466 | } | |
13fe0198 MA |
2467 | } |
2468 | ||
37f8a883 | 2469 | static void |
fcff0f35 | 2470 | receive_cksum(struct receive_arg *ra, int len, void *buf) |
37f8a883 MA |
2471 | { |
2472 | if (ra->byteswap) { | |
a6255b7f | 2473 | (void) fletcher_4_incremental_byteswap(buf, len, &ra->cksum); |
37f8a883 | 2474 | } else { |
a6255b7f | 2475 | (void) fletcher_4_incremental_native(buf, len, &ra->cksum); |
37f8a883 MA |
2476 | } |
2477 | } | |
2478 | ||
2479 | /* | |
fcff0f35 PD |
2480 | * Read the payload into a buffer of size len, and update the current record's |
2481 | * payload field. | |
2482 | * Allocate ra->next_rrd and read the next record's header into | |
2483 | * ra->next_rrd->header. | |
37f8a883 MA |
2484 | * Verify checksum of payload and next record. |
2485 | */ | |
2486 | static int | |
fcff0f35 | 2487 | receive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) |
37f8a883 MA |
2488 | { |
2489 | int err; | |
2490 | zio_cksum_t cksum_orig; | |
2491 | zio_cksum_t *cksump; | |
2492 | ||
2493 | if (len != 0) { | |
fcff0f35 | 2494 | ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); |
47dfff3b | 2495 | err = receive_read(ra, len, buf); |
37f8a883 MA |
2496 | if (err != 0) |
2497 | return (err); | |
47dfff3b MA |
2498 | receive_cksum(ra, len, buf); |
2499 | ||
2500 | /* note: rrd is NULL when reading the begin record's payload */ | |
2501 | if (ra->rrd != NULL) { | |
2502 | ra->rrd->payload = buf; | |
2503 | ra->rrd->payload_size = len; | |
2504 | ra->rrd->bytes_read = ra->bytes_read; | |
2505 | } | |
37f8a883 MA |
2506 | } |
2507 | ||
2508 | ra->prev_cksum = ra->cksum; | |
2509 | ||
fcff0f35 PD |
2510 | ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); |
2511 | err = receive_read(ra, sizeof (ra->next_rrd->header), | |
2512 | &ra->next_rrd->header); | |
47dfff3b | 2513 | ra->next_rrd->bytes_read = ra->bytes_read; |
fcff0f35 PD |
2514 | if (err != 0) { |
2515 | kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); | |
2516 | ra->next_rrd = NULL; | |
37f8a883 | 2517 | return (err); |
fcff0f35 PD |
2518 | } |
2519 | if (ra->next_rrd->header.drr_type == DRR_BEGIN) { | |
2520 | kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); | |
2521 | ra->next_rrd = NULL; | |
37f8a883 | 2522 | return (SET_ERROR(EINVAL)); |
fcff0f35 | 2523 | } |
37f8a883 MA |
2524 | |
2525 | /* | |
2526 | * Note: checksum is of everything up to but not including the | |
2527 | * checksum itself. | |
2528 | */ | |
2529 | ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), | |
2530 | ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); | |
fcff0f35 | 2531 | receive_cksum(ra, |
37f8a883 | 2532 | offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), |
fcff0f35 | 2533 | &ra->next_rrd->header); |
37f8a883 | 2534 | |
fcff0f35 PD |
2535 | cksum_orig = ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; |
2536 | cksump = &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; | |
37f8a883 MA |
2537 | |
2538 | if (ra->byteswap) | |
fcff0f35 | 2539 | byteswap_record(&ra->next_rrd->header); |
37f8a883 MA |
2540 | |
2541 | if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && | |
fcff0f35 PD |
2542 | !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { |
2543 | kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); | |
2544 | ra->next_rrd = NULL; | |
37f8a883 | 2545 | return (SET_ERROR(ECKSUM)); |
fcff0f35 | 2546 | } |
37f8a883 | 2547 | |
fcff0f35 | 2548 | receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); |
37f8a883 MA |
2549 | |
2550 | return (0); | |
2551 | } | |
2552 | ||
e6d3a843 PD |
2553 | static void |
2554 | objlist_create(struct objlist *list) | |
2555 | { | |
2556 | list_create(&list->list, sizeof (struct receive_objnode), | |
2557 | offsetof(struct receive_objnode, node)); | |
2558 | list->last_lookup = 0; | |
2559 | } | |
2560 | ||
2561 | static void | |
2562 | objlist_destroy(struct objlist *list) | |
2563 | { | |
2564 | struct receive_objnode *n; | |
2565 | ||
2566 | for (n = list_remove_head(&list->list); | |
2567 | n != NULL; n = list_remove_head(&list->list)) { | |
2568 | kmem_free(n, sizeof (*n)); | |
2569 | } | |
2570 | list_destroy(&list->list); | |
2571 | } | |
2572 | ||
2573 | /* | |
2574 | * This function looks through the objlist to see if the specified object number | |
2575 | * is contained in the objlist. In the process, it will remove all object | |
2576 | * numbers in the list that are smaller than the specified object number. Thus, | |
2577 | * any lookup of an object number smaller than a previously looked up object | |
2578 | * number will always return false; therefore, all lookups should be done in | |
2579 | * ascending order. | |
2580 | */ | |
2581 | static boolean_t | |
2582 | objlist_exists(struct objlist *list, uint64_t object) | |
2583 | { | |
2584 | struct receive_objnode *node = list_head(&list->list); | |
2585 | ASSERT3U(object, >=, list->last_lookup); | |
2586 | list->last_lookup = object; | |
2587 | while (node != NULL && node->object < object) { | |
2588 | VERIFY3P(node, ==, list_remove_head(&list->list)); | |
2589 | kmem_free(node, sizeof (*node)); | |
2590 | node = list_head(&list->list); | |
2591 | } | |
2592 | return (node != NULL && node->object == object); | |
2593 | } | |
2594 | ||
2595 | /* | |
2596 | * The objlist is a list of object numbers stored in ascending order. However, | |
2597 | * the insertion of new object numbers does not seek out the correct location to | |
2598 | * store a new object number; instead, it appends it to the list for simplicity. | |
2599 | * Thus, any users must take care to only insert new object numbers in ascending | |
2600 | * order. | |
2601 | */ | |
2602 | static void | |
2603 | objlist_insert(struct objlist *list, uint64_t object) | |
2604 | { | |
2605 | struct receive_objnode *node = kmem_zalloc(sizeof (*node), KM_SLEEP); | |
2606 | node->object = object; | |
2607 | #ifdef ZFS_DEBUG | |
2608 | { | |
2609 | struct receive_objnode *last_object = list_tail(&list->list); | |
2610 | uint64_t last_objnum = (last_object != NULL ? last_object->object : 0); | |
2611 | ASSERT3U(node->object, >, last_objnum); | |
2612 | } | |
2613 | #endif | |
2614 | list_insert_tail(&list->list, node); | |
2615 | } | |
2616 | ||
fcff0f35 PD |
2617 | /* |
2618 | * Issue the prefetch reads for any necessary indirect blocks. | |
2619 | * | |
2620 | * We use the object ignore list to tell us whether or not to issue prefetches | |
2621 | * for a given object. We do this for both correctness (in case the blocksize | |
2622 | * of an object has changed) and performance (if the object doesn't exist, don't | |
2623 | * needlessly try to issue prefetches). We also trim the list as we go through | |
2624 | * the stream to prevent it from growing to an unbounded size. | |
2625 | * | |
2626 | * The object numbers within will always be in sorted order, and any write | |
2627 | * records we see will also be in sorted order, but they're not sorted with | |
2628 | * respect to each other (i.e. we can get several object records before | |
2629 | * receiving each object's write records). As a result, once we've reached a | |
2630 | * given object number, we can safely remove any reference to lower object | |
2631 | * numbers in the ignore list. In practice, we receive up to 32 object records | |
2632 | * before receiving write records, so the list can have up to 32 nodes in it. | |
2633 | */ | |
2634 | /* ARGSUSED */ | |
2635 | static void | |
2636 | receive_read_prefetch(struct receive_arg *ra, | |
2637 | uint64_t object, uint64_t offset, uint64_t length) | |
2638 | { | |
e6d3a843 | 2639 | if (!objlist_exists(&ra->ignore_objlist, object)) { |
fcff0f35 PD |
2640 | dmu_prefetch(ra->os, object, 1, offset, length, |
2641 | ZIO_PRIORITY_SYNC_READ); | |
2642 | } | |
2643 | } | |
2644 | ||
2645 | /* | |
2646 | * Read records off the stream, issuing any necessary prefetches. | |
2647 | */ | |
37f8a883 | 2648 | static int |
fcff0f35 | 2649 | receive_read_record(struct receive_arg *ra) |
37f8a883 MA |
2650 | { |
2651 | int err; | |
2652 | ||
fcff0f35 | 2653 | switch (ra->rrd->header.drr_type) { |
37f8a883 MA |
2654 | case DRR_OBJECT: |
2655 | { | |
fcff0f35 PD |
2656 | struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; |
2657 | uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8); | |
2658 | void *buf = kmem_zalloc(size, KM_SLEEP); | |
2659 | dmu_object_info_t doi; | |
2660 | err = receive_read_payload_and_next_header(ra, size, buf); | |
2661 | if (err != 0) { | |
2662 | kmem_free(buf, size); | |
37f8a883 | 2663 | return (err); |
fcff0f35 PD |
2664 | } |
2665 | err = dmu_object_info(ra->os, drro->drr_object, &doi); | |
2666 | /* | |
2667 | * See receive_read_prefetch for an explanation why we're | |
2668 | * storing this object in the ignore_obj_list. | |
2669 | */ | |
2670 | if (err == ENOENT || | |
2671 | (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { | |
e6d3a843 | 2672 | objlist_insert(&ra->ignore_objlist, drro->drr_object); |
fcff0f35 PD |
2673 | err = 0; |
2674 | } | |
2675 | return (err); | |
37f8a883 MA |
2676 | } |
2677 | case DRR_FREEOBJECTS: | |
2678 | { | |
fcff0f35 PD |
2679 | err = receive_read_payload_and_next_header(ra, 0, NULL); |
2680 | return (err); | |
37f8a883 MA |
2681 | } |
2682 | case DRR_WRITE: | |
2683 | { | |
fcff0f35 | 2684 | struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; |
2aa34383 DK |
2685 | arc_buf_t *abuf; |
2686 | boolean_t is_meta = DMU_OT_IS_METADATA(drrw->drr_type); | |
2687 | if (DRR_WRITE_COMPRESSED(drrw)) { | |
2688 | ASSERT3U(drrw->drr_compressed_size, >, 0); | |
2689 | ASSERT3U(drrw->drr_logical_size, >=, | |
2690 | drrw->drr_compressed_size); | |
2691 | ASSERT(!is_meta); | |
2692 | abuf = arc_loan_compressed_buf( | |
2693 | dmu_objset_spa(ra->os), | |
2694 | drrw->drr_compressed_size, drrw->drr_logical_size, | |
2695 | drrw->drr_compressiontype); | |
2696 | } else { | |
2697 | abuf = arc_loan_buf(dmu_objset_spa(ra->os), | |
2698 | is_meta, drrw->drr_logical_size); | |
2699 | } | |
37f8a883 | 2700 | |
fcff0f35 | 2701 | err = receive_read_payload_and_next_header(ra, |
2aa34383 | 2702 | DRR_WRITE_PAYLOAD_SIZE(drrw), abuf->b_data); |
fcff0f35 | 2703 | if (err != 0) { |
37f8a883 | 2704 | dmu_return_arcbuf(abuf); |
fcff0f35 PD |
2705 | return (err); |
2706 | } | |
2707 | ra->rrd->write_buf = abuf; | |
2708 | receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, | |
2aa34383 | 2709 | drrw->drr_logical_size); |
37f8a883 MA |
2710 | return (err); |
2711 | } | |
2712 | case DRR_WRITE_BYREF: | |
2713 | { | |
fcff0f35 PD |
2714 | struct drr_write_byref *drrwb = |
2715 | &ra->rrd->header.drr_u.drr_write_byref; | |
2716 | err = receive_read_payload_and_next_header(ra, 0, NULL); | |
2717 | receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, | |
2718 | drrwb->drr_length); | |
2719 | return (err); | |
37f8a883 MA |
2720 | } |
2721 | case DRR_WRITE_EMBEDDED: | |
2722 | { | |
2723 | struct drr_write_embedded *drrwe = | |
fcff0f35 PD |
2724 | &ra->rrd->header.drr_u.drr_write_embedded; |
2725 | uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); | |
2726 | void *buf = kmem_zalloc(size, KM_SLEEP); | |
2727 | ||
2728 | err = receive_read_payload_and_next_header(ra, size, buf); | |
2729 | if (err != 0) { | |
2730 | kmem_free(buf, size); | |
37f8a883 | 2731 | return (err); |
fcff0f35 PD |
2732 | } |
2733 | ||
2734 | receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, | |
2735 | drrwe->drr_length); | |
2736 | return (err); | |
37f8a883 MA |
2737 | } |
2738 | case DRR_FREE: | |
2739 | { | |
fcff0f35 PD |
2740 | /* |
2741 | * It might be beneficial to prefetch indirect blocks here, but | |
2742 | * we don't really have the data to decide for sure. | |
2743 | */ | |
2744 | err = receive_read_payload_and_next_header(ra, 0, NULL); | |
2745 | return (err); | |
37f8a883 MA |
2746 | } |
2747 | case DRR_END: | |
2748 | { | |
fcff0f35 | 2749 | struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; |
37f8a883 | 2750 | if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) |
47dfff3b | 2751 | return (SET_ERROR(ECKSUM)); |
37f8a883 MA |
2752 | return (0); |
2753 | } | |
2754 | case DRR_SPILL: | |
2755 | { | |
fcff0f35 PD |
2756 | struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; |
2757 | void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP); | |
2758 | err = receive_read_payload_and_next_header(ra, drrs->drr_length, | |
2759 | buf); | |
37f8a883 | 2760 | if (err != 0) |
fcff0f35 PD |
2761 | kmem_free(buf, drrs->drr_length); |
2762 | return (err); | |
2763 | } | |
2764 | default: | |
2765 | return (SET_ERROR(EINVAL)); | |
2766 | } | |
2767 | } | |
2768 | ||
2769 | /* | |
2770 | * Commit the records to the pool. | |
2771 | */ | |
2772 | static int | |
2773 | receive_process_record(struct receive_writer_arg *rwa, | |
2774 | struct receive_record_arg *rrd) | |
2775 | { | |
2776 | int err; | |
2777 | ||
47dfff3b MA |
2778 | /* Processing in order, therefore bytes_read should be increasing. */ |
2779 | ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read); | |
2780 | rwa->bytes_read = rrd->bytes_read; | |
2781 | ||
fcff0f35 PD |
2782 | switch (rrd->header.drr_type) { |
2783 | case DRR_OBJECT: | |
2784 | { | |
2785 | struct drr_object *drro = &rrd->header.drr_u.drr_object; | |
2786 | err = receive_object(rwa, drro, rrd->payload); | |
2787 | kmem_free(rrd->payload, rrd->payload_size); | |
2788 | rrd->payload = NULL; | |
2789 | return (err); | |
2790 | } | |
2791 | case DRR_FREEOBJECTS: | |
2792 | { | |
2793 | struct drr_freeobjects *drrfo = | |
2794 | &rrd->header.drr_u.drr_freeobjects; | |
2795 | return (receive_freeobjects(rwa, drrfo)); | |
2796 | } | |
2797 | case DRR_WRITE: | |
2798 | { | |
2799 | struct drr_write *drrw = &rrd->header.drr_u.drr_write; | |
2800 | err = receive_write(rwa, drrw, rrd->write_buf); | |
2801 | /* if receive_write() is successful, it consumes the arc_buf */ | |
2802 | if (err != 0) | |
2803 | dmu_return_arcbuf(rrd->write_buf); | |
2804 | rrd->write_buf = NULL; | |
2805 | rrd->payload = NULL; | |
2806 | return (err); | |
2807 | } | |
2808 | case DRR_WRITE_BYREF: | |
2809 | { | |
2810 | struct drr_write_byref *drrwbr = | |
2811 | &rrd->header.drr_u.drr_write_byref; | |
2812 | return (receive_write_byref(rwa, drrwbr)); | |
2813 | } | |
2814 | case DRR_WRITE_EMBEDDED: | |
2815 | { | |
2816 | struct drr_write_embedded *drrwe = | |
2817 | &rrd->header.drr_u.drr_write_embedded; | |
2818 | err = receive_write_embedded(rwa, drrwe, rrd->payload); | |
2819 | kmem_free(rrd->payload, rrd->payload_size); | |
2820 | rrd->payload = NULL; | |
2821 | return (err); | |
2822 | } | |
2823 | case DRR_FREE: | |
2824 | { | |
2825 | struct drr_free *drrf = &rrd->header.drr_u.drr_free; | |
2826 | return (receive_free(rwa, drrf)); | |
2827 | } | |
2828 | case DRR_SPILL: | |
2829 | { | |
2830 | struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; | |
2831 | err = receive_spill(rwa, drrs, rrd->payload); | |
2832 | kmem_free(rrd->payload, rrd->payload_size); | |
2833 | rrd->payload = NULL; | |
2834 | return (err); | |
37f8a883 MA |
2835 | } |
2836 | default: | |
2837 | return (SET_ERROR(EINVAL)); | |
2838 | } | |
2839 | } | |
2840 | ||
34dc7c2f | 2841 | /* |
fcff0f35 PD |
2842 | * dmu_recv_stream's worker thread; pull records off the queue, and then call |
2843 | * receive_process_record When we're done, signal the main thread and exit. | |
2844 | */ | |
2845 | static void | |
2846 | receive_writer_thread(void *arg) | |
2847 | { | |
2848 | struct receive_writer_arg *rwa = arg; | |
2849 | struct receive_record_arg *rrd; | |
3e635ac1 TC |
2850 | fstrans_cookie_t cookie = spl_fstrans_mark(); |
2851 | ||
fcff0f35 PD |
2852 | for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; |
2853 | rrd = bqueue_dequeue(&rwa->q)) { | |
2854 | /* | |
2855 | * If there's an error, the main thread will stop putting things | |
2856 | * on the queue, but we need to clear everything in it before we | |
2857 | * can exit. | |
2858 | */ | |
2859 | if (rwa->err == 0) { | |
2860 | rwa->err = receive_process_record(rwa, rrd); | |
2861 | } else if (rrd->write_buf != NULL) { | |
2862 | dmu_return_arcbuf(rrd->write_buf); | |
2863 | rrd->write_buf = NULL; | |
2864 | rrd->payload = NULL; | |
2865 | } else if (rrd->payload != NULL) { | |
2866 | kmem_free(rrd->payload, rrd->payload_size); | |
2867 | rrd->payload = NULL; | |
2868 | } | |
2869 | kmem_free(rrd, sizeof (*rrd)); | |
2870 | } | |
2871 | kmem_free(rrd, sizeof (*rrd)); | |
2872 | mutex_enter(&rwa->mutex); | |
2873 | rwa->done = B_TRUE; | |
2874 | cv_signal(&rwa->cv); | |
2875 | mutex_exit(&rwa->mutex); | |
3e635ac1 | 2876 | spl_fstrans_unmark(cookie); |
fcff0f35 PD |
2877 | } |
2878 | ||
47dfff3b MA |
2879 | static int |
2880 | resume_check(struct receive_arg *ra, nvlist_t *begin_nvl) | |
2881 | { | |
2882 | uint64_t val; | |
2883 | objset_t *mos = dmu_objset_pool(ra->os)->dp_meta_objset; | |
2884 | uint64_t dsobj = dmu_objset_id(ra->os); | |
2885 | uint64_t resume_obj, resume_off; | |
2886 | ||
2887 | if (nvlist_lookup_uint64(begin_nvl, | |
2888 | "resume_object", &resume_obj) != 0 || | |
2889 | nvlist_lookup_uint64(begin_nvl, | |
2890 | "resume_offset", &resume_off) != 0) { | |
2891 | return (SET_ERROR(EINVAL)); | |
2892 | } | |
2893 | VERIFY0(zap_lookup(mos, dsobj, | |
2894 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val)); | |
2895 | if (resume_obj != val) | |
2896 | return (SET_ERROR(EINVAL)); | |
2897 | VERIFY0(zap_lookup(mos, dsobj, | |
2898 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val)); | |
2899 | if (resume_off != val) | |
2900 | return (SET_ERROR(EINVAL)); | |
2901 | ||
2902 | return (0); | |
2903 | } | |
2904 | ||
fcff0f35 PD |
2905 | /* |
2906 | * Read in the stream's records, one by one, and apply them to the pool. There | |
2907 | * are two threads involved; the thread that calls this function will spin up a | |
2908 | * worker thread, read the records off the stream one by one, and issue | |
2909 | * prefetches for any necessary indirect blocks. It will then push the records | |
2910 | * onto an internal blocking queue. The worker thread will pull the records off | |
2911 | * the queue, and actually write the data into the DMU. This way, the worker | |
2912 | * thread doesn't have to wait for reads to complete, since everything it needs | |
2913 | * (the indirect blocks) will be prefetched. | |
2914 | * | |
34dc7c2f BB |
2915 | * NB: callers *must* call dmu_recv_end() if this succeeds. |
2916 | */ | |
2917 | int | |
572e2857 BB |
2918 | dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, |
2919 | int cleanup_fd, uint64_t *action_handlep) | |
34dc7c2f | 2920 | { |
37f8a883 | 2921 | int err = 0; |
04bc4610 NB |
2922 | struct receive_arg *ra; |
2923 | struct receive_writer_arg *rwa; | |
428870ff | 2924 | int featureflags; |
47dfff3b MA |
2925 | uint32_t payloadlen; |
2926 | void *payload; | |
2927 | nvlist_t *begin_nvl = NULL; | |
34dc7c2f | 2928 | |
04bc4610 NB |
2929 | ra = kmem_zalloc(sizeof (*ra), KM_SLEEP); |
2930 | rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP); | |
2931 | ||
2932 | ra->byteswap = drc->drc_byteswap; | |
2933 | ra->cksum = drc->drc_cksum; | |
2934 | ra->vp = vp; | |
2935 | ra->voff = *voffp; | |
47dfff3b MA |
2936 | |
2937 | if (dsl_dataset_is_zapified(drc->drc_ds)) { | |
2938 | (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset, | |
2939 | drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES, | |
2940 | sizeof (ra->bytes_read), 1, &ra->bytes_read); | |
2941 | } | |
2942 | ||
e6d3a843 | 2943 | objlist_create(&ra->ignore_objlist); |
34dc7c2f BB |
2944 | |
2945 | /* these were verified in dmu_recv_begin */ | |
13fe0198 | 2946 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, |
428870ff | 2947 | DMU_SUBSTREAM); |
13fe0198 | 2948 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); |
34dc7c2f BB |
2949 | |
2950 | /* | |
2951 | * Open the objset we are modifying. | |
2952 | */ | |
04bc4610 | 2953 | VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra->os)); |
34dc7c2f | 2954 | |
d683ddbb | 2955 | ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); |
34dc7c2f | 2956 | |
428870ff BB |
2957 | featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); |
2958 | ||
2959 | /* if this stream is dedup'ed, set up the avl tree for guid mapping */ | |
2960 | if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { | |
572e2857 BB |
2961 | minor_t minor; |
2962 | ||
2963 | if (cleanup_fd == -1) { | |
04bc4610 | 2964 | ra->err = SET_ERROR(EBADF); |
572e2857 BB |
2965 | goto out; |
2966 | } | |
04bc4610 NB |
2967 | ra->err = zfs_onexit_fd_hold(cleanup_fd, &minor); |
2968 | if (ra->err != 0) { | |
572e2857 BB |
2969 | cleanup_fd = -1; |
2970 | goto out; | |
2971 | } | |
2972 | ||
2973 | if (*action_handlep == 0) { | |
04bc4610 | 2974 | rwa->guid_to_ds_map = |
572e2857 | 2975 | kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); |
04bc4610 | 2976 | avl_create(rwa->guid_to_ds_map, guid_compare, |
572e2857 BB |
2977 | sizeof (guid_map_entry_t), |
2978 | offsetof(guid_map_entry_t, avlnode)); | |
37f8a883 | 2979 | err = zfs_onexit_add_cb(minor, |
04bc4610 | 2980 | free_guid_map_onexit, rwa->guid_to_ds_map, |
572e2857 | 2981 | action_handlep); |
04bc4610 | 2982 | if (ra->err != 0) |
572e2857 BB |
2983 | goto out; |
2984 | } else { | |
37f8a883 | 2985 | err = zfs_onexit_cb_data(minor, *action_handlep, |
04bc4610 NB |
2986 | (void **)&rwa->guid_to_ds_map); |
2987 | if (ra->err != 0) | |
572e2857 BB |
2988 | goto out; |
2989 | } | |
8d35c149 | 2990 | |
04bc4610 | 2991 | drc->drc_guid_to_ds_map = rwa->guid_to_ds_map; |
428870ff BB |
2992 | } |
2993 | ||
47dfff3b MA |
2994 | payloadlen = drc->drc_drr_begin->drr_payloadlen; |
2995 | payload = NULL; | |
2996 | if (payloadlen != 0) | |
2997 | payload = kmem_alloc(payloadlen, KM_SLEEP); | |
2998 | ||
2999 | err = receive_read_payload_and_next_header(ra, payloadlen, payload); | |
3000 | if (err != 0) { | |
3001 | if (payloadlen != 0) | |
3002 | kmem_free(payload, payloadlen); | |
37f8a883 | 3003 | goto out; |
47dfff3b MA |
3004 | } |
3005 | if (payloadlen != 0) { | |
3006 | err = nvlist_unpack(payload, payloadlen, &begin_nvl, KM_SLEEP); | |
3007 | kmem_free(payload, payloadlen); | |
3008 | if (err != 0) | |
3009 | goto out; | |
3010 | } | |
3011 | ||
3012 | if (featureflags & DMU_BACKUP_FEATURE_RESUMING) { | |
3013 | err = resume_check(ra, begin_nvl); | |
3014 | if (err != 0) | |
3015 | goto out; | |
3016 | } | |
37f8a883 | 3017 | |
04bc4610 | 3018 | (void) bqueue_init(&rwa->q, zfs_recv_queue_length, |
fcff0f35 | 3019 | offsetof(struct receive_record_arg, node)); |
04bc4610 NB |
3020 | cv_init(&rwa->cv, NULL, CV_DEFAULT, NULL); |
3021 | mutex_init(&rwa->mutex, NULL, MUTEX_DEFAULT, NULL); | |
3022 | rwa->os = ra->os; | |
3023 | rwa->byteswap = drc->drc_byteswap; | |
47dfff3b | 3024 | rwa->resumable = drc->drc_resumable; |
fcff0f35 | 3025 | |
04bc4610 | 3026 | (void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc, |
fcff0f35 PD |
3027 | TS_RUN, minclsyspri); |
3028 | /* | |
04bc4610 | 3029 | * We're reading rwa->err without locks, which is safe since we are the |
fcff0f35 PD |
3030 | * only reader, and the worker thread is the only writer. It's ok if we |
3031 | * miss a write for an iteration or two of the loop, since the writer | |
3032 | * thread will keep freeing records we send it until we send it an eos | |
3033 | * marker. | |
3034 | * | |
04bc4610 | 3035 | * We can leave this loop in 3 ways: First, if rwa->err is |
fcff0f35 PD |
3036 | * non-zero. In that case, the writer thread will free the rrd we just |
3037 | * pushed. Second, if we're interrupted; in that case, either it's the | |
47dfff3b | 3038 | * first loop and ra->rrd was never allocated, or it's later and ra->rrd |
fcff0f35 PD |
3039 | * has been handed off to the writer thread who will free it. Finally, |
3040 | * if receive_read_record fails or we're at the end of the stream, then | |
04bc4610 | 3041 | * we free ra->rrd and exit. |
fcff0f35 | 3042 | */ |
04bc4610 | 3043 | while (rwa->err == 0) { |
34dc7c2f | 3044 | if (issig(JUSTLOOKING) && issig(FORREAL)) { |
37f8a883 MA |
3045 | err = SET_ERROR(EINTR); |
3046 | break; | |
34dc7c2f BB |
3047 | } |
3048 | ||
04bc4610 NB |
3049 | ASSERT3P(ra->rrd, ==, NULL); |
3050 | ra->rrd = ra->next_rrd; | |
3051 | ra->next_rrd = NULL; | |
3052 | /* Allocates and loads header into ra->next_rrd */ | |
3053 | err = receive_read_record(ra); | |
34dc7c2f | 3054 | |
04bc4610 NB |
3055 | if (ra->rrd->header.drr_type == DRR_END || err != 0) { |
3056 | kmem_free(ra->rrd, sizeof (*ra->rrd)); | |
3057 | ra->rrd = NULL; | |
428870ff | 3058 | break; |
fcff0f35 PD |
3059 | } |
3060 | ||
04bc4610 NB |
3061 | bqueue_enqueue(&rwa->q, ra->rrd, |
3062 | sizeof (struct receive_record_arg) + ra->rrd->payload_size); | |
3063 | ra->rrd = NULL; | |
fcff0f35 | 3064 | } |
04bc4610 NB |
3065 | if (ra->next_rrd == NULL) |
3066 | ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); | |
3067 | ra->next_rrd->eos_marker = B_TRUE; | |
3068 | bqueue_enqueue(&rwa->q, ra->next_rrd, 1); | |
fcff0f35 | 3069 | |
04bc4610 NB |
3070 | mutex_enter(&rwa->mutex); |
3071 | while (!rwa->done) { | |
3072 | cv_wait(&rwa->cv, &rwa->mutex); | |
34dc7c2f | 3073 | } |
04bc4610 | 3074 | mutex_exit(&rwa->mutex); |
fcff0f35 | 3075 | |
04bc4610 NB |
3076 | cv_destroy(&rwa->cv); |
3077 | mutex_destroy(&rwa->mutex); | |
3078 | bqueue_destroy(&rwa->q); | |
fcff0f35 | 3079 | if (err == 0) |
04bc4610 | 3080 | err = rwa->err; |
34dc7c2f BB |
3081 | |
3082 | out: | |
47dfff3b | 3083 | nvlist_free(begin_nvl); |
572e2857 BB |
3084 | if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) |
3085 | zfs_onexit_fd_rele(cleanup_fd); | |
3086 | ||
37f8a883 | 3087 | if (err != 0) { |
34dc7c2f | 3088 | /* |
47dfff3b MA |
3089 | * Clean up references. If receive is not resumable, |
3090 | * destroy what we created, so we don't leave it in | |
3091 | * the inconsistent state. | |
34dc7c2f | 3092 | */ |
13fe0198 | 3093 | dmu_recv_cleanup_ds(drc); |
34dc7c2f BB |
3094 | } |
3095 | ||
04bc4610 | 3096 | *voffp = ra->voff; |
e6d3a843 | 3097 | objlist_destroy(&ra->ignore_objlist); |
04bc4610 NB |
3098 | kmem_free(ra, sizeof (*ra)); |
3099 | kmem_free(rwa, sizeof (*rwa)); | |
37f8a883 | 3100 | return (err); |
34dc7c2f BB |
3101 | } |
3102 | ||
34dc7c2f | 3103 | static int |
13fe0198 | 3104 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3105 | { |
13fe0198 MA |
3106 | dmu_recv_cookie_t *drc = arg; |
3107 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3108 | int error; | |
3109 | ||
3110 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
3111 | ||
3112 | if (!drc->drc_newfs) { | |
3113 | dsl_dataset_t *origin_head; | |
3114 | ||
3115 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
3116 | if (error != 0) | |
3117 | return (error); | |
19580676 MA |
3118 | if (drc->drc_force) { |
3119 | /* | |
3120 | * We will destroy any snapshots in tofs (i.e. before | |
3121 | * origin_head) that are after the origin (which is | |
3122 | * the snap before drc_ds, because drc_ds can not | |
3123 | * have any snaps of its own). | |
3124 | */ | |
d683ddbb JG |
3125 | uint64_t obj; |
3126 | ||
3127 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
3128 | while (obj != | |
3129 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
19580676 MA |
3130 | dsl_dataset_t *snap; |
3131 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
3132 | &snap); | |
3133 | if (error != 0) | |
b6640117 | 3134 | break; |
19580676 MA |
3135 | if (snap->ds_dir != origin_head->ds_dir) |
3136 | error = SET_ERROR(EINVAL); | |
3137 | if (error == 0) { | |
3138 | error = dsl_destroy_snapshot_check_impl( | |
3139 | snap, B_FALSE); | |
3140 | } | |
d683ddbb | 3141 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
3142 | dsl_dataset_rele(snap, FTAG); |
3143 | if (error != 0) | |
b6640117 AG |
3144 | break; |
3145 | } | |
3146 | if (error != 0) { | |
3147 | dsl_dataset_rele(origin_head, FTAG); | |
3148 | return (error); | |
19580676 MA |
3149 | } |
3150 | } | |
13fe0198 | 3151 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, |
831baf06 | 3152 | origin_head, drc->drc_force, drc->drc_owner, tx); |
13fe0198 MA |
3153 | if (error != 0) { |
3154 | dsl_dataset_rele(origin_head, FTAG); | |
3155 | return (error); | |
3156 | } | |
3157 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
788eb90c | 3158 | drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); |
13fe0198 MA |
3159 | dsl_dataset_rele(origin_head, FTAG); |
3160 | if (error != 0) | |
3161 | return (error); | |
34dc7c2f | 3162 | |
13fe0198 MA |
3163 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); |
3164 | } else { | |
3165 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
788eb90c | 3166 | drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); |
13fe0198 MA |
3167 | } |
3168 | return (error); | |
34dc7c2f BB |
3169 | } |
3170 | ||
3171 | static void | |
13fe0198 | 3172 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 3173 | { |
13fe0198 MA |
3174 | dmu_recv_cookie_t *drc = arg; |
3175 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3176 | ||
3177 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
3178 | tx, "snap=%s", drc->drc_tosnap); | |
3179 | ||
3180 | if (!drc->drc_newfs) { | |
3181 | dsl_dataset_t *origin_head; | |
3182 | ||
3183 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
3184 | &origin_head)); | |
19580676 MA |
3185 | |
3186 | if (drc->drc_force) { | |
3187 | /* | |
3188 | * Destroy any snapshots of drc_tofs (origin_head) | |
3189 | * after the origin (the snap before drc_ds). | |
3190 | */ | |
d683ddbb JG |
3191 | uint64_t obj; |
3192 | ||
3193 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
3194 | while (obj != | |
3195 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
19580676 MA |
3196 | dsl_dataset_t *snap; |
3197 | VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, | |
3198 | &snap)); | |
3199 | ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); | |
d683ddbb | 3200 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
3201 | dsl_destroy_snapshot_sync_impl(snap, |
3202 | B_FALSE, tx); | |
3203 | dsl_dataset_rele(snap, FTAG); | |
3204 | } | |
3205 | } | |
3206 | VERIFY3P(drc->drc_ds->ds_prev, ==, | |
3207 | origin_head->ds_prev); | |
3208 | ||
13fe0198 MA |
3209 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, |
3210 | origin_head, tx); | |
3211 | dsl_dataset_snapshot_sync_impl(origin_head, | |
3212 | drc->drc_tosnap, tx); | |
3213 | ||
3214 | /* set snapshot's creation time and guid */ | |
3215 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
d683ddbb | 3216 | dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = |
13fe0198 | 3217 | drc->drc_drrb->drr_creation_time; |
d683ddbb | 3218 | dsl_dataset_phys(origin_head->ds_prev)->ds_guid = |
13fe0198 | 3219 | drc->drc_drrb->drr_toguid; |
d683ddbb | 3220 | dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= |
13fe0198 MA |
3221 | ~DS_FLAG_INCONSISTENT; |
3222 | ||
3223 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
d683ddbb JG |
3224 | dsl_dataset_phys(origin_head)->ds_flags &= |
3225 | ~DS_FLAG_INCONSISTENT; | |
13fe0198 MA |
3226 | |
3227 | dsl_dataset_rele(origin_head, FTAG); | |
3228 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
831baf06 KW |
3229 | |
3230 | if (drc->drc_owner != NULL) | |
3231 | VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); | |
13fe0198 MA |
3232 | } else { |
3233 | dsl_dataset_t *ds = drc->drc_ds; | |
34dc7c2f | 3234 | |
13fe0198 | 3235 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); |
34dc7c2f | 3236 | |
13fe0198 MA |
3237 | /* set snapshot's creation time and guid */ |
3238 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
d683ddbb | 3239 | dsl_dataset_phys(ds->ds_prev)->ds_creation_time = |
13fe0198 | 3240 | drc->drc_drrb->drr_creation_time; |
d683ddbb JG |
3241 | dsl_dataset_phys(ds->ds_prev)->ds_guid = |
3242 | drc->drc_drrb->drr_toguid; | |
3243 | dsl_dataset_phys(ds->ds_prev)->ds_flags &= | |
3244 | ~DS_FLAG_INCONSISTENT; | |
34dc7c2f | 3245 | |
13fe0198 | 3246 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb | 3247 | dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; |
47dfff3b MA |
3248 | if (dsl_dataset_has_resume_receive_state(ds)) { |
3249 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3250 | DS_FIELD_RESUME_FROMGUID, tx); | |
3251 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3252 | DS_FIELD_RESUME_OBJECT, tx); | |
3253 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3254 | DS_FIELD_RESUME_OFFSET, tx); | |
3255 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3256 | DS_FIELD_RESUME_BYTES, tx); | |
3257 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3258 | DS_FIELD_RESUME_TOGUID, tx); | |
3259 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3260 | DS_FIELD_RESUME_TONAME, tx); | |
3261 | } | |
13fe0198 | 3262 | } |
d683ddbb | 3263 | drc->drc_newsnapobj = dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; |
a0bd735a | 3264 | zvol_create_minors(dp->dp_spa, drc->drc_tofs, B_TRUE); |
13fe0198 MA |
3265 | /* |
3266 | * Release the hold from dmu_recv_begin. This must be done before | |
3267 | * we return to open context, so that when we free the dataset's dnode, | |
3268 | * we can evict its bonus buffer. | |
3269 | */ | |
3270 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
3271 | drc->drc_ds = NULL; | |
34dc7c2f BB |
3272 | } |
3273 | ||
8d35c149 | 3274 | static int |
13fe0198 | 3275 | add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) |
8d35c149 | 3276 | { |
13fe0198 | 3277 | dsl_pool_t *dp; |
8d35c149 AS |
3278 | dsl_dataset_t *snapds; |
3279 | guid_map_entry_t *gmep; | |
3280 | int err; | |
3281 | ||
3282 | ASSERT(guid_map != NULL); | |
3283 | ||
13fe0198 MA |
3284 | err = dsl_pool_hold(name, FTAG, &dp); |
3285 | if (err != 0) | |
3286 | return (err); | |
7ec09286 MA |
3287 | gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); |
3288 | err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); | |
8d35c149 | 3289 | if (err == 0) { |
d683ddbb | 3290 | gmep->guid = dsl_dataset_phys(snapds)->ds_guid; |
8d35c149 AS |
3291 | gmep->gme_ds = snapds; |
3292 | avl_add(guid_map, gmep); | |
13fe0198 | 3293 | dsl_dataset_long_hold(snapds, gmep); |
7ec09286 MA |
3294 | } else { |
3295 | kmem_free(gmep, sizeof (*gmep)); | |
8d35c149 AS |
3296 | } |
3297 | ||
13fe0198 | 3298 | dsl_pool_rele(dp, FTAG); |
8d35c149 AS |
3299 | return (err); |
3300 | } | |
3301 | ||
13fe0198 MA |
3302 | static int dmu_recv_end_modified_blocks = 3; |
3303 | ||
428870ff BB |
3304 | static int |
3305 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
34dc7c2f | 3306 | { |
13fe0198 | 3307 | int error; |
34dc7c2f | 3308 | |
13fe0198 | 3309 | #ifdef _KERNEL |
13fe0198 MA |
3310 | /* |
3311 | * We will be destroying the ds; make sure its origin is unmounted if | |
3312 | * necessary. | |
3313 | */ | |
eca7b760 | 3314 | char name[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
3315 | dsl_dataset_name(drc->drc_ds, name); |
3316 | zfs_destroy_unmount_origin(name); | |
13fe0198 | 3317 | #endif |
34dc7c2f | 3318 | |
13fe0198 MA |
3319 | error = dsl_sync_task(drc->drc_tofs, |
3320 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3d45fdd6 | 3321 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
3322 | |
3323 | if (error != 0) | |
3324 | dmu_recv_cleanup_ds(drc); | |
3325 | return (error); | |
34dc7c2f | 3326 | } |
428870ff BB |
3327 | |
3328 | static int | |
3329 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
3330 | { | |
13fe0198 | 3331 | int error; |
428870ff | 3332 | |
13fe0198 MA |
3333 | error = dsl_sync_task(drc->drc_tofs, |
3334 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3d45fdd6 | 3335 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); |
428870ff | 3336 | |
13fe0198 MA |
3337 | if (error != 0) { |
3338 | dmu_recv_cleanup_ds(drc); | |
3339 | } else if (drc->drc_guid_to_ds_map != NULL) { | |
3340 | (void) add_ds_to_guidmap(drc->drc_tofs, | |
3341 | drc->drc_guid_to_ds_map, | |
3342 | drc->drc_newsnapobj); | |
428870ff | 3343 | } |
13fe0198 | 3344 | return (error); |
428870ff BB |
3345 | } |
3346 | ||
3347 | int | |
831baf06 | 3348 | dmu_recv_end(dmu_recv_cookie_t *drc, void *owner) |
428870ff | 3349 | { |
831baf06 KW |
3350 | drc->drc_owner = owner; |
3351 | ||
13fe0198 | 3352 | if (drc->drc_newfs) |
428870ff | 3353 | return (dmu_recv_new_end(drc)); |
13fe0198 MA |
3354 | else |
3355 | return (dmu_recv_existing_end(drc)); | |
428870ff | 3356 | } |
ea97f8ce MA |
3357 | |
3358 | /* | |
3359 | * Return TRUE if this objset is currently being received into. | |
3360 | */ | |
3361 | boolean_t | |
3362 | dmu_objset_is_receiving(objset_t *os) | |
3363 | { | |
3364 | return (os->os_dsl_dataset != NULL && | |
3365 | os->os_dsl_dataset->ds_owner == dmu_recv_tag); | |
3366 | } | |
fd8febbd TF |
3367 | |
3368 | #if defined(_KERNEL) | |
3369 | module_param(zfs_send_corrupt_data, int, 0644); | |
3370 | MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data"); | |
3371 | #endif |