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