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03916905 PD |
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 | /* | |
22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. | |
196bee4c | 24 | * Copyright (c) 2011, 2020 by Delphix. All rights reserved. |
03916905 PD |
25 | * Copyright (c) 2014, Joyent, Inc. All rights reserved. |
26 | * Copyright 2014 HybridCluster. All rights reserved. | |
d8d418ff | 27 | * Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. |
10b3c7f5 MN |
28 | * Copyright (c) 2019, Klara Inc. |
29 | * Copyright (c) 2019, Allan Jude | |
03916905 PD |
30 | */ |
31 | ||
32 | #include <sys/dmu.h> | |
33 | #include <sys/dmu_impl.h> | |
30af21b0 PD |
34 | #include <sys/dmu_send.h> |
35 | #include <sys/dmu_recv.h> | |
03916905 PD |
36 | #include <sys/dmu_tx.h> |
37 | #include <sys/dbuf.h> | |
38 | #include <sys/dnode.h> | |
39 | #include <sys/zfs_context.h> | |
40 | #include <sys/dmu_objset.h> | |
41 | #include <sys/dmu_traverse.h> | |
42 | #include <sys/dsl_dataset.h> | |
43 | #include <sys/dsl_dir.h> | |
44 | #include <sys/dsl_prop.h> | |
45 | #include <sys/dsl_pool.h> | |
46 | #include <sys/dsl_synctask.h> | |
03916905 PD |
47 | #include <sys/zfs_ioctl.h> |
48 | #include <sys/zap.h> | |
30af21b0 | 49 | #include <sys/zvol.h> |
03916905 PD |
50 | #include <sys/zio_checksum.h> |
51 | #include <sys/zfs_znode.h> | |
52 | #include <zfs_fletcher.h> | |
53 | #include <sys/avl.h> | |
54 | #include <sys/ddt.h> | |
55 | #include <sys/zfs_onexit.h> | |
03916905 PD |
56 | #include <sys/dsl_destroy.h> |
57 | #include <sys/blkptr.h> | |
58 | #include <sys/dsl_bookmark.h> | |
59 | #include <sys/zfeature.h> | |
60 | #include <sys/bqueue.h> | |
30af21b0 PD |
61 | #include <sys/objlist.h> |
62 | #ifdef _KERNEL | |
63 | #include <sys/zfs_vfsops.h> | |
64 | #endif | |
da92d5cb | 65 | #include <sys/zfs_file.h> |
03916905 | 66 | |
18168da7 AZ |
67 | static int zfs_recv_queue_length = SPA_MAXBLOCKSIZE; |
68 | static int zfs_recv_queue_ff = 20; | |
69 | static int zfs_recv_write_batch_size = 1024 * 1024; | |
03916905 | 70 | |
18168da7 AZ |
71 | static void *const dmu_recv_tag = "dmu_recv_tag"; |
72 | const char *const recv_clone_name = "%recv"; | |
03916905 | 73 | |
30af21b0 PD |
74 | static int receive_read_payload_and_next_header(dmu_recv_cookie_t *ra, int len, |
75 | void *buf); | |
76 | ||
77 | struct receive_record_arg { | |
78 | dmu_replay_record_t header; | |
79 | void *payload; /* Pointer to a buffer containing the payload */ | |
80 | /* | |
ba67d821 | 81 | * If the record is a WRITE or SPILL, pointer to the abd containing the |
30af21b0 PD |
82 | * payload. |
83 | */ | |
ba67d821 | 84 | abd_t *abd; |
30af21b0 PD |
85 | int payload_size; |
86 | uint64_t bytes_read; /* bytes read from stream when record created */ | |
87 | boolean_t eos_marker; /* Marks the end of the stream */ | |
88 | bqueue_node_t node; | |
89 | }; | |
90 | ||
91 | struct receive_writer_arg { | |
92 | objset_t *os; | |
93 | boolean_t byteswap; | |
94 | bqueue_t q; | |
95 | ||
96 | /* | |
ba67d821 MA |
97 | * These three members are used to signal to the main thread when |
98 | * we're done. | |
30af21b0 PD |
99 | */ |
100 | kmutex_t mutex; | |
101 | kcondvar_t cv; | |
102 | boolean_t done; | |
103 | ||
104 | int err; | |
30af21b0 PD |
105 | boolean_t resumable; |
106 | boolean_t raw; /* DMU_BACKUP_FEATURE_RAW set */ | |
107 | boolean_t spill; /* DRR_FLAG_SPILL_BLOCK set */ | |
7bcb7f08 | 108 | boolean_t full; /* this is a full send stream */ |
30af21b0 PD |
109 | uint64_t last_object; |
110 | uint64_t last_offset; | |
111 | uint64_t max_object; /* highest object ID referenced in stream */ | |
112 | uint64_t bytes_read; /* bytes read when current record created */ | |
113 | ||
7261fc2e MA |
114 | list_t write_batch; |
115 | ||
30af21b0 PD |
116 | /* Encryption parameters for the last received DRR_OBJECT_RANGE */ |
117 | boolean_t or_crypt_params_present; | |
118 | uint64_t or_firstobj; | |
119 | uint64_t or_numslots; | |
120 | uint8_t or_salt[ZIO_DATA_SALT_LEN]; | |
121 | uint8_t or_iv[ZIO_DATA_IV_LEN]; | |
122 | uint8_t or_mac[ZIO_DATA_MAC_LEN]; | |
123 | boolean_t or_byteorder; | |
124 | }; | |
125 | ||
03916905 PD |
126 | typedef struct dmu_recv_begin_arg { |
127 | const char *drba_origin; | |
128 | dmu_recv_cookie_t *drba_cookie; | |
129 | cred_t *drba_cred; | |
e59a377a | 130 | proc_t *drba_proc; |
03916905 | 131 | dsl_crypto_params_t *drba_dcp; |
03916905 PD |
132 | } dmu_recv_begin_arg_t; |
133 | ||
30af21b0 PD |
134 | static void |
135 | byteswap_record(dmu_replay_record_t *drr) | |
136 | { | |
137 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
138 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
139 | drr->drr_type = BSWAP_32(drr->drr_type); | |
140 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
141 | ||
142 | switch (drr->drr_type) { | |
143 | case DRR_BEGIN: | |
144 | DO64(drr_begin.drr_magic); | |
145 | DO64(drr_begin.drr_versioninfo); | |
146 | DO64(drr_begin.drr_creation_time); | |
147 | DO32(drr_begin.drr_type); | |
148 | DO32(drr_begin.drr_flags); | |
149 | DO64(drr_begin.drr_toguid); | |
150 | DO64(drr_begin.drr_fromguid); | |
151 | break; | |
152 | case DRR_OBJECT: | |
153 | DO64(drr_object.drr_object); | |
154 | DO32(drr_object.drr_type); | |
155 | DO32(drr_object.drr_bonustype); | |
156 | DO32(drr_object.drr_blksz); | |
157 | DO32(drr_object.drr_bonuslen); | |
158 | DO32(drr_object.drr_raw_bonuslen); | |
159 | DO64(drr_object.drr_toguid); | |
160 | DO64(drr_object.drr_maxblkid); | |
161 | break; | |
162 | case DRR_FREEOBJECTS: | |
163 | DO64(drr_freeobjects.drr_firstobj); | |
164 | DO64(drr_freeobjects.drr_numobjs); | |
165 | DO64(drr_freeobjects.drr_toguid); | |
166 | break; | |
167 | case DRR_WRITE: | |
168 | DO64(drr_write.drr_object); | |
169 | DO32(drr_write.drr_type); | |
170 | DO64(drr_write.drr_offset); | |
171 | DO64(drr_write.drr_logical_size); | |
172 | DO64(drr_write.drr_toguid); | |
173 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); | |
174 | DO64(drr_write.drr_key.ddk_prop); | |
175 | DO64(drr_write.drr_compressed_size); | |
176 | break; | |
30af21b0 PD |
177 | case DRR_WRITE_EMBEDDED: |
178 | DO64(drr_write_embedded.drr_object); | |
179 | DO64(drr_write_embedded.drr_offset); | |
180 | DO64(drr_write_embedded.drr_length); | |
181 | DO64(drr_write_embedded.drr_toguid); | |
182 | DO32(drr_write_embedded.drr_lsize); | |
183 | DO32(drr_write_embedded.drr_psize); | |
184 | break; | |
185 | case DRR_FREE: | |
186 | DO64(drr_free.drr_object); | |
187 | DO64(drr_free.drr_offset); | |
188 | DO64(drr_free.drr_length); | |
189 | DO64(drr_free.drr_toguid); | |
190 | break; | |
191 | case DRR_SPILL: | |
192 | DO64(drr_spill.drr_object); | |
193 | DO64(drr_spill.drr_length); | |
194 | DO64(drr_spill.drr_toguid); | |
195 | DO64(drr_spill.drr_compressed_size); | |
196 | DO32(drr_spill.drr_type); | |
197 | break; | |
198 | case DRR_OBJECT_RANGE: | |
199 | DO64(drr_object_range.drr_firstobj); | |
200 | DO64(drr_object_range.drr_numslots); | |
201 | DO64(drr_object_range.drr_toguid); | |
202 | break; | |
203 | case DRR_REDACT: | |
204 | DO64(drr_redact.drr_object); | |
205 | DO64(drr_redact.drr_offset); | |
206 | DO64(drr_redact.drr_length); | |
207 | DO64(drr_redact.drr_toguid); | |
208 | break; | |
209 | case DRR_END: | |
210 | DO64(drr_end.drr_toguid); | |
211 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); | |
212 | break; | |
213 | default: | |
214 | break; | |
215 | } | |
216 | ||
217 | if (drr->drr_type != DRR_BEGIN) { | |
218 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); | |
219 | } | |
220 | ||
221 | #undef DO64 | |
222 | #undef DO32 | |
223 | } | |
224 | ||
225 | static boolean_t | |
226 | redact_snaps_contains(uint64_t *snaps, uint64_t num_snaps, uint64_t guid) | |
227 | { | |
228 | for (int i = 0; i < num_snaps; i++) { | |
229 | if (snaps[i] == guid) | |
230 | return (B_TRUE); | |
231 | } | |
232 | return (B_FALSE); | |
233 | } | |
234 | ||
235 | /* | |
236 | * Check that the new stream we're trying to receive is redacted with respect to | |
237 | * a subset of the snapshots that the origin was redacted with respect to. For | |
238 | * the reasons behind this, see the man page on redacted zfs sends and receives. | |
239 | */ | |
240 | static boolean_t | |
241 | compatible_redact_snaps(uint64_t *origin_snaps, uint64_t origin_num_snaps, | |
242 | uint64_t *redact_snaps, uint64_t num_redact_snaps) | |
243 | { | |
244 | /* | |
245 | * Short circuit the comparison; if we are redacted with respect to | |
246 | * more snapshots than the origin, we can't be redacted with respect | |
247 | * to a subset. | |
248 | */ | |
249 | if (num_redact_snaps > origin_num_snaps) { | |
250 | return (B_FALSE); | |
251 | } | |
252 | ||
253 | for (int i = 0; i < num_redact_snaps; i++) { | |
254 | if (!redact_snaps_contains(origin_snaps, origin_num_snaps, | |
255 | redact_snaps[i])) { | |
256 | return (B_FALSE); | |
257 | } | |
258 | } | |
259 | return (B_TRUE); | |
260 | } | |
261 | ||
262 | static boolean_t | |
263 | redact_check(dmu_recv_begin_arg_t *drba, dsl_dataset_t *origin) | |
264 | { | |
265 | uint64_t *origin_snaps; | |
266 | uint64_t origin_num_snaps; | |
267 | dmu_recv_cookie_t *drc = drba->drba_cookie; | |
268 | struct drr_begin *drrb = drc->drc_drrb; | |
269 | int featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); | |
270 | int err = 0; | |
271 | boolean_t ret = B_TRUE; | |
272 | uint64_t *redact_snaps; | |
273 | uint_t numredactsnaps; | |
274 | ||
275 | /* | |
276 | * If this is a full send stream, we're safe no matter what. | |
277 | */ | |
278 | if (drrb->drr_fromguid == 0) | |
279 | return (ret); | |
280 | ||
281 | VERIFY(dsl_dataset_get_uint64_array_feature(origin, | |
282 | SPA_FEATURE_REDACTED_DATASETS, &origin_num_snaps, &origin_snaps)); | |
283 | ||
284 | if (nvlist_lookup_uint64_array(drc->drc_begin_nvl, | |
285 | BEGINNV_REDACT_FROM_SNAPS, &redact_snaps, &numredactsnaps) == | |
286 | 0) { | |
287 | /* | |
288 | * If the send stream was sent from the redaction bookmark or | |
289 | * the redacted version of the dataset, then we're safe. Verify | |
290 | * that this is from the a compatible redaction bookmark or | |
291 | * redacted dataset. | |
292 | */ | |
293 | if (!compatible_redact_snaps(origin_snaps, origin_num_snaps, | |
294 | redact_snaps, numredactsnaps)) { | |
295 | err = EINVAL; | |
296 | } | |
297 | } else if (featureflags & DMU_BACKUP_FEATURE_REDACTED) { | |
298 | /* | |
299 | * If the stream is redacted, it must be redacted with respect | |
300 | * to a subset of what the origin is redacted with respect to. | |
301 | * See case number 2 in the zfs man page section on redacted zfs | |
302 | * send. | |
303 | */ | |
304 | err = nvlist_lookup_uint64_array(drc->drc_begin_nvl, | |
305 | BEGINNV_REDACT_SNAPS, &redact_snaps, &numredactsnaps); | |
306 | ||
307 | if (err != 0 || !compatible_redact_snaps(origin_snaps, | |
308 | origin_num_snaps, redact_snaps, numredactsnaps)) { | |
309 | err = EINVAL; | |
310 | } | |
311 | } else if (!redact_snaps_contains(origin_snaps, origin_num_snaps, | |
312 | drrb->drr_toguid)) { | |
313 | /* | |
314 | * If the stream isn't redacted but the origin is, this must be | |
315 | * one of the snapshots the origin is redacted with respect to. | |
316 | * See case number 1 in the zfs man page section on redacted zfs | |
317 | * send. | |
318 | */ | |
319 | err = EINVAL; | |
320 | } | |
321 | ||
322 | if (err != 0) | |
323 | ret = B_FALSE; | |
324 | return (ret); | |
325 | } | |
326 | ||
7bcb7f08 MA |
327 | /* |
328 | * If we previously received a stream with --large-block, we don't support | |
329 | * receiving an incremental on top of it without --large-block. This avoids | |
330 | * forcing a read-modify-write or trying to re-aggregate a string of WRITE | |
331 | * records. | |
332 | */ | |
333 | static int | |
334 | recv_check_large_blocks(dsl_dataset_t *ds, uint64_t featureflags) | |
335 | { | |
336 | if (dsl_dataset_feature_is_active(ds, SPA_FEATURE_LARGE_BLOCKS) && | |
337 | !(featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS)) | |
338 | return (SET_ERROR(ZFS_ERR_STREAM_LARGE_BLOCK_MISMATCH)); | |
339 | return (0); | |
340 | } | |
341 | ||
03916905 PD |
342 | static int |
343 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, | |
344 | uint64_t fromguid, uint64_t featureflags) | |
345 | { | |
346 | uint64_t val; | |
d8d418ff | 347 | uint64_t children; |
03916905 PD |
348 | int error; |
349 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
350 | boolean_t encrypted = ds->ds_dir->dd_crypto_obj != 0; | |
351 | boolean_t raw = (featureflags & DMU_BACKUP_FEATURE_RAW) != 0; | |
352 | boolean_t embed = (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) != 0; | |
353 | ||
ebeb6f23 | 354 | /* Temporary clone name must not exist. */ |
03916905 PD |
355 | error = zap_lookup(dp->dp_meta_objset, |
356 | dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, | |
357 | 8, 1, &val); | |
358 | if (error != ENOENT) | |
30af21b0 | 359 | return (error == 0 ? SET_ERROR(EBUSY) : error); |
03916905 | 360 | |
ebeb6f23 AG |
361 | /* Resume state must not be set. */ |
362 | if (dsl_dataset_has_resume_receive_state(ds)) | |
363 | return (SET_ERROR(EBUSY)); | |
364 | ||
365 | /* New snapshot name must not exist. */ | |
03916905 PD |
366 | error = zap_lookup(dp->dp_meta_objset, |
367 | dsl_dataset_phys(ds)->ds_snapnames_zapobj, | |
368 | drba->drba_cookie->drc_tosnap, 8, 1, &val); | |
369 | if (error != ENOENT) | |
30af21b0 | 370 | return (error == 0 ? SET_ERROR(EEXIST) : error); |
03916905 | 371 | |
ebeb6f23 | 372 | /* Must not have children if receiving a ZVOL. */ |
d8d418ff | 373 | error = zap_count(dp->dp_meta_objset, |
374 | dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, &children); | |
375 | if (error != 0) | |
376 | return (error); | |
377 | if (drba->drba_cookie->drc_drrb->drr_type != DMU_OST_ZFS && | |
378 | children > 0) | |
379 | return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); | |
380 | ||
03916905 PD |
381 | /* |
382 | * Check snapshot limit before receiving. We'll recheck again at the | |
383 | * end, but might as well abort before receiving if we're already over | |
384 | * the limit. | |
385 | * | |
386 | * Note that we do not check the file system limit with | |
387 | * dsl_dir_fscount_check because the temporary %clones don't count | |
388 | * against that limit. | |
389 | */ | |
390 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, | |
e59a377a | 391 | NULL, drba->drba_cred, drba->drba_proc); |
03916905 PD |
392 | if (error != 0) |
393 | return (error); | |
394 | ||
395 | if (fromguid != 0) { | |
396 | dsl_dataset_t *snap; | |
397 | uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; | |
398 | ||
30af21b0 | 399 | /* Can't perform a raw receive on top of a non-raw receive */ |
03916905 PD |
400 | if (!encrypted && raw) |
401 | return (SET_ERROR(EINVAL)); | |
402 | ||
403 | /* Encryption is incompatible with embedded data */ | |
404 | if (encrypted && embed) | |
405 | return (SET_ERROR(EINVAL)); | |
406 | ||
407 | /* Find snapshot in this dir that matches fromguid. */ | |
408 | while (obj != 0) { | |
409 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
410 | &snap); | |
411 | if (error != 0) | |
412 | return (SET_ERROR(ENODEV)); | |
413 | if (snap->ds_dir != ds->ds_dir) { | |
414 | dsl_dataset_rele(snap, FTAG); | |
415 | return (SET_ERROR(ENODEV)); | |
416 | } | |
417 | if (dsl_dataset_phys(snap)->ds_guid == fromguid) | |
418 | break; | |
419 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; | |
420 | dsl_dataset_rele(snap, FTAG); | |
421 | } | |
422 | if (obj == 0) | |
423 | return (SET_ERROR(ENODEV)); | |
424 | ||
425 | if (drba->drba_cookie->drc_force) { | |
f00ab3f2 | 426 | drba->drba_cookie->drc_fromsnapobj = obj; |
03916905 PD |
427 | } else { |
428 | /* | |
429 | * If we are not forcing, there must be no | |
c08c30ed TC |
430 | * changes since fromsnap. Raw sends have an |
431 | * additional constraint that requires that | |
432 | * no "noop" snapshots exist between fromsnap | |
433 | * and tosnap for the IVset checking code to | |
434 | * work properly. | |
03916905 | 435 | */ |
c08c30ed TC |
436 | if (dsl_dataset_modified_since_snap(ds, snap) || |
437 | (raw && | |
438 | dsl_dataset_phys(ds)->ds_prev_snap_obj != | |
439 | snap->ds_object)) { | |
03916905 PD |
440 | dsl_dataset_rele(snap, FTAG); |
441 | return (SET_ERROR(ETXTBSY)); | |
442 | } | |
f00ab3f2 TC |
443 | drba->drba_cookie->drc_fromsnapobj = |
444 | ds->ds_prev->ds_object; | |
03916905 PD |
445 | } |
446 | ||
30af21b0 PD |
447 | if (dsl_dataset_feature_is_active(snap, |
448 | SPA_FEATURE_REDACTED_DATASETS) && !redact_check(drba, | |
449 | snap)) { | |
450 | dsl_dataset_rele(snap, FTAG); | |
451 | return (SET_ERROR(EINVAL)); | |
452 | } | |
453 | ||
7bcb7f08 MA |
454 | error = recv_check_large_blocks(snap, featureflags); |
455 | if (error != 0) { | |
456 | dsl_dataset_rele(snap, FTAG); | |
457 | return (error); | |
458 | } | |
459 | ||
03916905 PD |
460 | dsl_dataset_rele(snap, FTAG); |
461 | } else { | |
462 | /* if full, then must be forced */ | |
463 | if (!drba->drba_cookie->drc_force) | |
464 | return (SET_ERROR(EEXIST)); | |
465 | ||
466 | /* | |
467 | * We don't support using zfs recv -F to blow away | |
468 | * encrypted filesystems. This would require the | |
469 | * dsl dir to point to the old encryption key and | |
470 | * the new one at the same time during the receive. | |
471 | */ | |
472 | if ((!encrypted && raw) || encrypted) | |
473 | return (SET_ERROR(EINVAL)); | |
474 | ||
475 | /* | |
476 | * Perform the same encryption checks we would if | |
477 | * we were creating a new dataset from scratch. | |
478 | */ | |
479 | if (!raw) { | |
480 | boolean_t will_encrypt; | |
481 | ||
482 | error = dmu_objset_create_crypt_check( | |
483 | ds->ds_dir->dd_parent, drba->drba_dcp, | |
484 | &will_encrypt); | |
485 | if (error != 0) | |
486 | return (error); | |
487 | ||
488 | if (will_encrypt && embed) | |
489 | return (SET_ERROR(EINVAL)); | |
490 | } | |
03916905 PD |
491 | } |
492 | ||
493 | return (0); | |
03916905 PD |
494 | } |
495 | ||
30af21b0 PD |
496 | /* |
497 | * Check that any feature flags used in the data stream we're receiving are | |
498 | * supported by the pool we are receiving into. | |
499 | * | |
500 | * Note that some of the features we explicitly check here have additional | |
501 | * (implicit) features they depend on, but those dependencies are enforced | |
502 | * through the zfeature_register() calls declaring the features that we | |
503 | * explicitly check. | |
504 | */ | |
505 | static int | |
506 | recv_begin_check_feature_flags_impl(uint64_t featureflags, spa_t *spa) | |
507 | { | |
508 | /* | |
509 | * Check if there are any unsupported feature flags. | |
510 | */ | |
511 | if (!DMU_STREAM_SUPPORTED(featureflags)) { | |
512 | return (SET_ERROR(ZFS_ERR_UNKNOWN_SEND_STREAM_FEATURE)); | |
513 | } | |
514 | ||
515 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
516 | if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && | |
517 | spa_version(spa) < SPA_VERSION_SA) | |
518 | return (SET_ERROR(ENOTSUP)); | |
519 | ||
520 | /* | |
10b3c7f5 MN |
521 | * LZ4 compressed, ZSTD compressed, embedded, mooched, large blocks, |
522 | * and large_dnodes in the stream can only be used if those pool | |
523 | * features are enabled because we don't attempt to decompress / | |
524 | * un-embed / un-mooch / split up the blocks / dnodes during the | |
525 | * receive process. | |
30af21b0 PD |
526 | */ |
527 | if ((featureflags & DMU_BACKUP_FEATURE_LZ4) && | |
528 | !spa_feature_is_enabled(spa, SPA_FEATURE_LZ4_COMPRESS)) | |
529 | return (SET_ERROR(ENOTSUP)); | |
10b3c7f5 MN |
530 | if ((featureflags & DMU_BACKUP_FEATURE_ZSTD) && |
531 | !spa_feature_is_enabled(spa, SPA_FEATURE_ZSTD_COMPRESS)) | |
532 | return (SET_ERROR(ENOTSUP)); | |
30af21b0 PD |
533 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && |
534 | !spa_feature_is_enabled(spa, SPA_FEATURE_EMBEDDED_DATA)) | |
535 | return (SET_ERROR(ENOTSUP)); | |
536 | if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && | |
537 | !spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) | |
538 | return (SET_ERROR(ENOTSUP)); | |
539 | if ((featureflags & DMU_BACKUP_FEATURE_LARGE_DNODE) && | |
540 | !spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_DNODE)) | |
541 | return (SET_ERROR(ENOTSUP)); | |
542 | ||
543 | /* | |
544 | * Receiving redacted streams requires that redacted datasets are | |
545 | * enabled. | |
546 | */ | |
547 | if ((featureflags & DMU_BACKUP_FEATURE_REDACTED) && | |
548 | !spa_feature_is_enabled(spa, SPA_FEATURE_REDACTED_DATASETS)) | |
549 | return (SET_ERROR(ENOTSUP)); | |
550 | ||
551 | return (0); | |
552 | } | |
553 | ||
03916905 PD |
554 | static int |
555 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
556 | { | |
557 | dmu_recv_begin_arg_t *drba = arg; | |
558 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
559 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
560 | uint64_t fromguid = drrb->drr_fromguid; | |
561 | int flags = drrb->drr_flags; | |
40ab927a | 562 | ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE; |
03916905 | 563 | int error; |
30af21b0 | 564 | uint64_t featureflags = drba->drba_cookie->drc_featureflags; |
03916905 PD |
565 | dsl_dataset_t *ds; |
566 | const char *tofs = drba->drba_cookie->drc_tofs; | |
567 | ||
568 | /* already checked */ | |
569 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
570 | ASSERT(!(featureflags & DMU_BACKUP_FEATURE_RESUMING)); | |
571 | ||
572 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
573 | DMU_COMPOUNDSTREAM || | |
574 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
575 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
576 | return (SET_ERROR(EINVAL)); | |
577 | ||
30af21b0 PD |
578 | error = recv_begin_check_feature_flags_impl(featureflags, dp->dp_spa); |
579 | if (error != 0) | |
580 | return (error); | |
03916905 | 581 | |
30af21b0 | 582 | /* Resumable receives require extensible datasets */ |
03916905 PD |
583 | if (drba->drba_cookie->drc_resumable && |
584 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EXTENSIBLE_DATASET)) | |
585 | return (SET_ERROR(ENOTSUP)); | |
586 | ||
03916905 PD |
587 | if (featureflags & DMU_BACKUP_FEATURE_RAW) { |
588 | /* raw receives require the encryption feature */ | |
589 | if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_ENCRYPTION)) | |
590 | return (SET_ERROR(ENOTSUP)); | |
591 | ||
592 | /* embedded data is incompatible with encryption and raw recv */ | |
593 | if (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) | |
594 | return (SET_ERROR(EINVAL)); | |
caf9dd20 BB |
595 | |
596 | /* raw receives require spill block allocation flag */ | |
597 | if (!(flags & DRR_FLAG_SPILL_BLOCK)) | |
598 | return (SET_ERROR(ZFS_ERR_SPILL_BLOCK_FLAG_MISSING)); | |
03916905 | 599 | } else { |
68ddc06b AF |
600 | /* |
601 | * We support unencrypted datasets below encrypted ones now, | |
602 | * so add the DS_HOLD_FLAG_DECRYPT flag only if we are dealing | |
603 | * with a dataset we may encrypt. | |
604 | */ | |
605 | if (drba->drba_dcp != NULL && | |
606 | drba->drba_dcp->cp_crypt != ZIO_CRYPT_OFF) { | |
607 | dsflags |= DS_HOLD_FLAG_DECRYPT; | |
608 | } | |
03916905 PD |
609 | } |
610 | ||
611 | error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds); | |
612 | if (error == 0) { | |
613 | /* target fs already exists; recv into temp clone */ | |
614 | ||
615 | /* Can't recv a clone into an existing fs */ | |
616 | if (flags & DRR_FLAG_CLONE || drba->drba_origin) { | |
617 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
618 | return (SET_ERROR(EINVAL)); | |
619 | } | |
620 | ||
621 | error = recv_begin_check_existing_impl(drba, ds, fromguid, | |
622 | featureflags); | |
623 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
624 | } else if (error == ENOENT) { | |
625 | /* target fs does not exist; must be a full backup or clone */ | |
626 | char buf[ZFS_MAX_DATASET_NAME_LEN]; | |
d8d418ff | 627 | objset_t *os; |
03916905 PD |
628 | |
629 | /* | |
630 | * If it's a non-clone incremental, we are missing the | |
631 | * target fs, so fail the recv. | |
632 | */ | |
30af21b0 | 633 | if (fromguid != 0 && !((flags & DRR_FLAG_CLONE) || |
03916905 PD |
634 | drba->drba_origin)) |
635 | return (SET_ERROR(ENOENT)); | |
636 | ||
637 | /* | |
638 | * If we're receiving a full send as a clone, and it doesn't | |
639 | * contain all the necessary free records and freeobject | |
640 | * records, reject it. | |
641 | */ | |
30af21b0 | 642 | if (fromguid == 0 && drba->drba_origin != NULL && |
03916905 PD |
643 | !(flags & DRR_FLAG_FREERECORDS)) |
644 | return (SET_ERROR(EINVAL)); | |
645 | ||
646 | /* Open the parent of tofs */ | |
647 | ASSERT3U(strlen(tofs), <, sizeof (buf)); | |
648 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); | |
da689887 | 649 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); |
03916905 PD |
650 | if (error != 0) |
651 | return (error); | |
652 | ||
653 | if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0 && | |
654 | drba->drba_origin == NULL) { | |
655 | boolean_t will_encrypt; | |
656 | ||
657 | /* | |
658 | * Check that we aren't breaking any encryption rules | |
659 | * and that we have all the parameters we need to | |
660 | * create an encrypted dataset if necessary. If we are | |
661 | * making an encrypted dataset the stream can't have | |
662 | * embedded data. | |
663 | */ | |
664 | error = dmu_objset_create_crypt_check(ds->ds_dir, | |
665 | drba->drba_dcp, &will_encrypt); | |
666 | if (error != 0) { | |
da689887 | 667 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
668 | return (error); |
669 | } | |
670 | ||
671 | if (will_encrypt && | |
672 | (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)) { | |
da689887 | 673 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
674 | return (SET_ERROR(EINVAL)); |
675 | } | |
676 | } | |
677 | ||
678 | /* | |
679 | * Check filesystem and snapshot limits before receiving. We'll | |
680 | * recheck snapshot limits again at the end (we create the | |
681 | * filesystems and increment those counts during begin_sync). | |
682 | */ | |
683 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
e59a377a MA |
684 | ZFS_PROP_FILESYSTEM_LIMIT, NULL, |
685 | drba->drba_cred, drba->drba_proc); | |
03916905 | 686 | if (error != 0) { |
da689887 | 687 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
688 | return (error); |
689 | } | |
690 | ||
691 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
e59a377a MA |
692 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, |
693 | drba->drba_cred, drba->drba_proc); | |
03916905 | 694 | if (error != 0) { |
da689887 | 695 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
696 | return (error); |
697 | } | |
698 | ||
d8d418ff | 699 | /* can't recv below anything but filesystems (eg. no ZVOLs) */ |
700 | error = dmu_objset_from_ds(ds, &os); | |
701 | if (error != 0) { | |
da689887 | 702 | dsl_dataset_rele(ds, FTAG); |
d8d418ff | 703 | return (error); |
704 | } | |
705 | if (dmu_objset_type(os) != DMU_OST_ZFS) { | |
da689887 | 706 | dsl_dataset_rele(ds, FTAG); |
d8d418ff | 707 | return (SET_ERROR(ZFS_ERR_WRONG_PARENT)); |
708 | } | |
709 | ||
03916905 PD |
710 | if (drba->drba_origin != NULL) { |
711 | dsl_dataset_t *origin; | |
03916905 PD |
712 | error = dsl_dataset_hold_flags(dp, drba->drba_origin, |
713 | dsflags, FTAG, &origin); | |
714 | if (error != 0) { | |
da689887 | 715 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
716 | return (error); |
717 | } | |
718 | if (!origin->ds_is_snapshot) { | |
719 | dsl_dataset_rele_flags(origin, dsflags, FTAG); | |
da689887 | 720 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
721 | return (SET_ERROR(EINVAL)); |
722 | } | |
723 | if (dsl_dataset_phys(origin)->ds_guid != fromguid && | |
724 | fromguid != 0) { | |
725 | dsl_dataset_rele_flags(origin, dsflags, FTAG); | |
da689887 | 726 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
727 | return (SET_ERROR(ENODEV)); |
728 | } | |
30af21b0 | 729 | |
03916905 PD |
730 | if (origin->ds_dir->dd_crypto_obj != 0 && |
731 | (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)) { | |
732 | dsl_dataset_rele_flags(origin, dsflags, FTAG); | |
da689887 | 733 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
734 | return (SET_ERROR(EINVAL)); |
735 | } | |
30af21b0 PD |
736 | |
737 | /* | |
738 | * If the origin is redacted we need to verify that this | |
739 | * send stream can safely be received on top of the | |
740 | * origin. | |
741 | */ | |
742 | if (dsl_dataset_feature_is_active(origin, | |
743 | SPA_FEATURE_REDACTED_DATASETS)) { | |
744 | if (!redact_check(drba, origin)) { | |
745 | dsl_dataset_rele_flags(origin, dsflags, | |
746 | FTAG); | |
747 | dsl_dataset_rele_flags(ds, dsflags, | |
748 | FTAG); | |
749 | return (SET_ERROR(EINVAL)); | |
750 | } | |
751 | } | |
752 | ||
7bcb7f08 MA |
753 | error = recv_check_large_blocks(ds, featureflags); |
754 | if (error != 0) { | |
755 | dsl_dataset_rele_flags(origin, dsflags, FTAG); | |
756 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
757 | return (error); | |
758 | } | |
759 | ||
30af21b0 | 760 | dsl_dataset_rele_flags(origin, dsflags, FTAG); |
03916905 | 761 | } |
d8d418ff | 762 | |
da689887 | 763 | dsl_dataset_rele(ds, FTAG); |
03916905 PD |
764 | error = 0; |
765 | } | |
766 | return (error); | |
767 | } | |
768 | ||
769 | static void | |
770 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) | |
771 | { | |
772 | dmu_recv_begin_arg_t *drba = arg; | |
773 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
774 | objset_t *mos = dp->dp_meta_objset; | |
30af21b0 PD |
775 | dmu_recv_cookie_t *drc = drba->drba_cookie; |
776 | struct drr_begin *drrb = drc->drc_drrb; | |
777 | const char *tofs = drc->drc_tofs; | |
778 | uint64_t featureflags = drc->drc_featureflags; | |
03916905 PD |
779 | dsl_dataset_t *ds, *newds; |
780 | objset_t *os; | |
781 | uint64_t dsobj; | |
40ab927a | 782 | ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE; |
03916905 PD |
783 | int error; |
784 | uint64_t crflags = 0; | |
785 | dsl_crypto_params_t dummy_dcp = { 0 }; | |
786 | dsl_crypto_params_t *dcp = drba->drba_dcp; | |
787 | ||
788 | if (drrb->drr_flags & DRR_FLAG_CI_DATA) | |
789 | crflags |= DS_FLAG_CI_DATASET; | |
790 | ||
791 | if ((featureflags & DMU_BACKUP_FEATURE_RAW) == 0) | |
792 | dsflags |= DS_HOLD_FLAG_DECRYPT; | |
793 | ||
794 | /* | |
795 | * Raw, non-incremental recvs always use a dummy dcp with | |
796 | * the raw cmd set. Raw incremental recvs do not use a dcp | |
797 | * since the encryption parameters are already set in stone. | |
798 | */ | |
30af21b0 | 799 | if (dcp == NULL && drrb->drr_fromguid == 0 && |
03916905 PD |
800 | drba->drba_origin == NULL) { |
801 | ASSERT3P(dcp, ==, NULL); | |
802 | dcp = &dummy_dcp; | |
803 | ||
804 | if (featureflags & DMU_BACKUP_FEATURE_RAW) | |
805 | dcp->cp_cmd = DCP_CMD_RAW_RECV; | |
806 | } | |
807 | ||
808 | error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds); | |
809 | if (error == 0) { | |
810 | /* create temporary clone */ | |
811 | dsl_dataset_t *snap = NULL; | |
812 | ||
f00ab3f2 | 813 | if (drba->drba_cookie->drc_fromsnapobj != 0) { |
03916905 | 814 | VERIFY0(dsl_dataset_hold_obj(dp, |
f00ab3f2 | 815 | drba->drba_cookie->drc_fromsnapobj, FTAG, &snap)); |
03916905 PD |
816 | ASSERT3P(dcp, ==, NULL); |
817 | } | |
03916905 PD |
818 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, |
819 | snap, crflags, drba->drba_cred, dcp, tx); | |
f00ab3f2 | 820 | if (drba->drba_cookie->drc_fromsnapobj != 0) |
03916905 PD |
821 | dsl_dataset_rele(snap, FTAG); |
822 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
823 | } else { | |
824 | dsl_dir_t *dd; | |
825 | const char *tail; | |
826 | dsl_dataset_t *origin = NULL; | |
827 | ||
828 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
829 | ||
830 | if (drba->drba_origin != NULL) { | |
831 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
832 | FTAG, &origin)); | |
833 | ASSERT3P(dcp, ==, NULL); | |
834 | } | |
835 | ||
836 | /* Create new dataset. */ | |
837 | dsobj = dsl_dataset_create_sync(dd, strrchr(tofs, '/') + 1, | |
838 | origin, crflags, drba->drba_cred, dcp, tx); | |
839 | if (origin != NULL) | |
840 | dsl_dataset_rele(origin, FTAG); | |
841 | dsl_dir_rele(dd, FTAG); | |
30af21b0 PD |
842 | drc->drc_newfs = B_TRUE; |
843 | } | |
844 | VERIFY0(dsl_dataset_own_obj_force(dp, dsobj, dsflags, dmu_recv_tag, | |
845 | &newds)); | |
846 | if (dsl_dataset_feature_is_active(newds, | |
847 | SPA_FEATURE_REDACTED_DATASETS)) { | |
848 | /* | |
849 | * If the origin dataset is redacted, the child will be redacted | |
850 | * when we create it. We clear the new dataset's | |
851 | * redaction info; if it should be redacted, we'll fill | |
852 | * in its information later. | |
853 | */ | |
854 | dsl_dataset_deactivate_feature(newds, | |
855 | SPA_FEATURE_REDACTED_DATASETS, tx); | |
03916905 | 856 | } |
03916905 PD |
857 | VERIFY0(dmu_objset_from_ds(newds, &os)); |
858 | ||
30af21b0 | 859 | if (drc->drc_resumable) { |
03916905 PD |
860 | dsl_dataset_zapify(newds, tx); |
861 | if (drrb->drr_fromguid != 0) { | |
862 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_FROMGUID, | |
863 | 8, 1, &drrb->drr_fromguid, tx)); | |
864 | } | |
865 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TOGUID, | |
866 | 8, 1, &drrb->drr_toguid, tx)); | |
867 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_TONAME, | |
868 | 1, strlen(drrb->drr_toname) + 1, drrb->drr_toname, tx)); | |
869 | uint64_t one = 1; | |
870 | uint64_t zero = 0; | |
871 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OBJECT, | |
872 | 8, 1, &one, tx)); | |
873 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_OFFSET, | |
874 | 8, 1, &zero, tx)); | |
875 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_BYTES, | |
876 | 8, 1, &zero, tx)); | |
877 | if (featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) { | |
878 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_LARGEBLOCK, | |
879 | 8, 1, &one, tx)); | |
880 | } | |
881 | if (featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) { | |
882 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_EMBEDOK, | |
883 | 8, 1, &one, tx)); | |
884 | } | |
885 | if (featureflags & DMU_BACKUP_FEATURE_COMPRESSED) { | |
886 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_COMPRESSOK, | |
887 | 8, 1, &one, tx)); | |
888 | } | |
889 | if (featureflags & DMU_BACKUP_FEATURE_RAW) { | |
890 | VERIFY0(zap_add(mos, dsobj, DS_FIELD_RESUME_RAWOK, | |
891 | 8, 1, &one, tx)); | |
892 | } | |
30af21b0 PD |
893 | |
894 | uint64_t *redact_snaps; | |
895 | uint_t numredactsnaps; | |
896 | if (nvlist_lookup_uint64_array(drc->drc_begin_nvl, | |
897 | BEGINNV_REDACT_FROM_SNAPS, &redact_snaps, | |
898 | &numredactsnaps) == 0) { | |
899 | VERIFY0(zap_add(mos, dsobj, | |
900 | DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS, | |
901 | sizeof (*redact_snaps), numredactsnaps, | |
902 | redact_snaps, tx)); | |
903 | } | |
03916905 PD |
904 | } |
905 | ||
906 | /* | |
907 | * Usually the os->os_encrypted value is tied to the presence of a | |
908 | * DSL Crypto Key object in the dd. However, that will not be received | |
909 | * until dmu_recv_stream(), so we set the value manually for now. | |
910 | */ | |
911 | if (featureflags & DMU_BACKUP_FEATURE_RAW) { | |
912 | os->os_encrypted = B_TRUE; | |
913 | drba->drba_cookie->drc_raw = B_TRUE; | |
914 | } | |
915 | ||
30af21b0 PD |
916 | if (featureflags & DMU_BACKUP_FEATURE_REDACTED) { |
917 | uint64_t *redact_snaps; | |
918 | uint_t numredactsnaps; | |
919 | VERIFY0(nvlist_lookup_uint64_array(drc->drc_begin_nvl, | |
920 | BEGINNV_REDACT_SNAPS, &redact_snaps, &numredactsnaps)); | |
921 | dsl_dataset_activate_redaction(newds, redact_snaps, | |
922 | numredactsnaps, tx); | |
923 | } | |
924 | ||
03916905 PD |
925 | dmu_buf_will_dirty(newds->ds_dbuf, tx); |
926 | dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; | |
927 | ||
928 | /* | |
929 | * If we actually created a non-clone, we need to create the objset | |
930 | * in our new dataset. If this is a raw send we postpone this until | |
931 | * dmu_recv_stream() so that we can allocate the metadnode with the | |
932 | * properties from the DRR_BEGIN payload. | |
933 | */ | |
934 | rrw_enter(&newds->ds_bp_rwlock, RW_READER, FTAG); | |
935 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds)) && | |
936 | (featureflags & DMU_BACKUP_FEATURE_RAW) == 0) { | |
937 | (void) dmu_objset_create_impl(dp->dp_spa, | |
938 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); | |
939 | } | |
940 | rrw_exit(&newds->ds_bp_rwlock, FTAG); | |
941 | ||
942 | drba->drba_cookie->drc_ds = newds; | |
0fdd6106 | 943 | drba->drba_cookie->drc_os = os; |
03916905 | 944 | |
74756182 | 945 | spa_history_log_internal_ds(newds, "receive", tx, " "); |
03916905 PD |
946 | } |
947 | ||
948 | static int | |
949 | dmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx) | |
950 | { | |
951 | dmu_recv_begin_arg_t *drba = arg; | |
30af21b0 | 952 | dmu_recv_cookie_t *drc = drba->drba_cookie; |
03916905 | 953 | dsl_pool_t *dp = dmu_tx_pool(tx); |
30af21b0 | 954 | struct drr_begin *drrb = drc->drc_drrb; |
03916905 | 955 | int error; |
40ab927a | 956 | ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE; |
03916905 | 957 | dsl_dataset_t *ds; |
30af21b0 | 958 | const char *tofs = drc->drc_tofs; |
03916905 PD |
959 | |
960 | /* already checked */ | |
961 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
30af21b0 | 962 | ASSERT(drc->drc_featureflags & DMU_BACKUP_FEATURE_RESUMING); |
03916905 PD |
963 | |
964 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
965 | DMU_COMPOUNDSTREAM || | |
966 | drrb->drr_type >= DMU_OST_NUMTYPES) | |
967 | return (SET_ERROR(EINVAL)); | |
968 | ||
03916905 | 969 | /* |
30af21b0 PD |
970 | * This is mostly a sanity check since we should have already done these |
971 | * checks during a previous attempt to receive the data. | |
03916905 | 972 | */ |
30af21b0 PD |
973 | error = recv_begin_check_feature_flags_impl(drc->drc_featureflags, |
974 | dp->dp_spa); | |
975 | if (error != 0) | |
976 | return (error); | |
03916905 PD |
977 | |
978 | /* 6 extra bytes for /%recv */ | |
979 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
30af21b0 | 980 | |
03916905 PD |
981 | (void) snprintf(recvname, sizeof (recvname), "%s/%s", |
982 | tofs, recv_clone_name); | |
983 | ||
30af21b0 | 984 | if (drc->drc_featureflags & DMU_BACKUP_FEATURE_RAW) { |
caf9dd20 BB |
985 | /* raw receives require spill block allocation flag */ |
986 | if (!(drrb->drr_flags & DRR_FLAG_SPILL_BLOCK)) | |
987 | return (SET_ERROR(ZFS_ERR_SPILL_BLOCK_FLAG_MISSING)); | |
988 | } else { | |
03916905 | 989 | dsflags |= DS_HOLD_FLAG_DECRYPT; |
caf9dd20 | 990 | } |
03916905 PD |
991 | |
992 | if (dsl_dataset_hold_flags(dp, recvname, dsflags, FTAG, &ds) != 0) { | |
993 | /* %recv does not exist; continue in tofs */ | |
994 | error = dsl_dataset_hold_flags(dp, tofs, dsflags, FTAG, &ds); | |
995 | if (error != 0) | |
996 | return (error); | |
997 | } | |
998 | ||
999 | /* check that ds is marked inconsistent */ | |
1000 | if (!DS_IS_INCONSISTENT(ds)) { | |
1001 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1002 | return (SET_ERROR(EINVAL)); | |
1003 | } | |
1004 | ||
1005 | /* check that there is resuming data, and that the toguid matches */ | |
1006 | if (!dsl_dataset_is_zapified(ds)) { | |
1007 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1008 | return (SET_ERROR(EINVAL)); | |
1009 | } | |
1010 | uint64_t val; | |
1011 | error = zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1012 | DS_FIELD_RESUME_TOGUID, sizeof (val), 1, &val); | |
1013 | if (error != 0 || drrb->drr_toguid != val) { | |
1014 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1015 | return (SET_ERROR(EINVAL)); | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Check if the receive is still running. If so, it will be owned. | |
1020 | * Note that nothing else can own the dataset (e.g. after the receive | |
1021 | * fails) because it will be marked inconsistent. | |
1022 | */ | |
1023 | if (dsl_dataset_has_owner(ds)) { | |
1024 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1025 | return (SET_ERROR(EBUSY)); | |
1026 | } | |
1027 | ||
1028 | /* There should not be any snapshots of this fs yet. */ | |
1029 | if (ds->ds_prev != NULL && ds->ds_prev->ds_dir == ds->ds_dir) { | |
1030 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1031 | return (SET_ERROR(EINVAL)); | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Note: resume point will be checked when we process the first WRITE | |
1036 | * record. | |
1037 | */ | |
1038 | ||
1039 | /* check that the origin matches */ | |
1040 | val = 0; | |
1041 | (void) zap_lookup(dp->dp_meta_objset, ds->ds_object, | |
1042 | DS_FIELD_RESUME_FROMGUID, sizeof (val), 1, &val); | |
1043 | if (drrb->drr_fromguid != val) { | |
1044 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1045 | return (SET_ERROR(EINVAL)); | |
1046 | } | |
1047 | ||
aa646323 | 1048 | if (ds->ds_prev != NULL && drrb->drr_fromguid != 0) |
61152d10 TC |
1049 | drc->drc_fromsnapobj = ds->ds_prev->ds_object; |
1050 | ||
30af21b0 PD |
1051 | /* |
1052 | * If we're resuming, and the send is redacted, then the original send | |
1053 | * must have been redacted, and must have been redacted with respect to | |
1054 | * the same snapshots. | |
1055 | */ | |
1056 | if (drc->drc_featureflags & DMU_BACKUP_FEATURE_REDACTED) { | |
1057 | uint64_t num_ds_redact_snaps; | |
1058 | uint64_t *ds_redact_snaps; | |
1059 | ||
1060 | uint_t num_stream_redact_snaps; | |
1061 | uint64_t *stream_redact_snaps; | |
1062 | ||
1063 | if (nvlist_lookup_uint64_array(drc->drc_begin_nvl, | |
1064 | BEGINNV_REDACT_SNAPS, &stream_redact_snaps, | |
1065 | &num_stream_redact_snaps) != 0) { | |
1066 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1067 | return (SET_ERROR(EINVAL)); | |
1068 | } | |
1069 | ||
1070 | if (!dsl_dataset_get_uint64_array_feature(ds, | |
1071 | SPA_FEATURE_REDACTED_DATASETS, &num_ds_redact_snaps, | |
1072 | &ds_redact_snaps)) { | |
1073 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1074 | return (SET_ERROR(EINVAL)); | |
1075 | } | |
1076 | ||
1077 | for (int i = 0; i < num_ds_redact_snaps; i++) { | |
1078 | if (!redact_snaps_contains(ds_redact_snaps, | |
1079 | num_ds_redact_snaps, stream_redact_snaps[i])) { | |
1080 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1081 | return (SET_ERROR(EINVAL)); | |
1082 | } | |
1083 | } | |
1084 | } | |
7bcb7f08 MA |
1085 | |
1086 | error = recv_check_large_blocks(ds, drc->drc_featureflags); | |
1087 | if (error != 0) { | |
1088 | dsl_dataset_rele_flags(ds, dsflags, FTAG); | |
1089 | return (error); | |
1090 | } | |
1091 | ||
03916905 PD |
1092 | dsl_dataset_rele_flags(ds, dsflags, FTAG); |
1093 | return (0); | |
1094 | } | |
1095 | ||
1096 | static void | |
1097 | dmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx) | |
1098 | { | |
1099 | dmu_recv_begin_arg_t *drba = arg; | |
1100 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1101 | const char *tofs = drba->drba_cookie->drc_tofs; | |
30af21b0 | 1102 | uint64_t featureflags = drba->drba_cookie->drc_featureflags; |
03916905 | 1103 | dsl_dataset_t *ds; |
40ab927a | 1104 | ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE; |
03916905 PD |
1105 | /* 6 extra bytes for /%recv */ |
1106 | char recvname[ZFS_MAX_DATASET_NAME_LEN + 6]; | |
1107 | ||
30af21b0 PD |
1108 | (void) snprintf(recvname, sizeof (recvname), "%s/%s", tofs, |
1109 | recv_clone_name); | |
03916905 PD |
1110 | |
1111 | if (featureflags & DMU_BACKUP_FEATURE_RAW) { | |
1112 | drba->drba_cookie->drc_raw = B_TRUE; | |
1113 | } else { | |
1114 | dsflags |= DS_HOLD_FLAG_DECRYPT; | |
1115 | } | |
1116 | ||
30af21b0 PD |
1117 | if (dsl_dataset_own_force(dp, recvname, dsflags, dmu_recv_tag, &ds) |
1118 | != 0) { | |
03916905 | 1119 | /* %recv does not exist; continue in tofs */ |
30af21b0 PD |
1120 | VERIFY0(dsl_dataset_own_force(dp, tofs, dsflags, dmu_recv_tag, |
1121 | &ds)); | |
03916905 PD |
1122 | drba->drba_cookie->drc_newfs = B_TRUE; |
1123 | } | |
1124 | ||
03916905 | 1125 | ASSERT(DS_IS_INCONSISTENT(ds)); |
03916905 PD |
1126 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); |
1127 | ASSERT(!BP_IS_HOLE(dsl_dataset_get_blkptr(ds)) || | |
1128 | drba->drba_cookie->drc_raw); | |
1129 | rrw_exit(&ds->ds_bp_rwlock, FTAG); | |
1130 | ||
1131 | drba->drba_cookie->drc_ds = ds; | |
0fdd6106 | 1132 | VERIFY0(dmu_objset_from_ds(ds, &drba->drba_cookie->drc_os)); |
61152d10 | 1133 | drba->drba_cookie->drc_should_save = B_TRUE; |
03916905 | 1134 | |
74756182 | 1135 | spa_history_log_internal_ds(ds, "resume receive", tx, " "); |
03916905 PD |
1136 | } |
1137 | ||
1138 | /* | |
1139 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
1140 | * succeeds; otherwise we will leak the holds on the datasets. | |
1141 | */ | |
1142 | int | |
1143 | dmu_recv_begin(char *tofs, char *tosnap, dmu_replay_record_t *drr_begin, | |
1144 | boolean_t force, boolean_t resumable, nvlist_t *localprops, | |
da92d5cb MM |
1145 | nvlist_t *hidden_args, char *origin, dmu_recv_cookie_t *drc, |
1146 | zfs_file_t *fp, offset_t *voffp) | |
03916905 PD |
1147 | { |
1148 | dmu_recv_begin_arg_t drba = { 0 }; | |
30af21b0 | 1149 | int err; |
03916905 | 1150 | |
861166b0 | 1151 | memset(drc, 0, sizeof (dmu_recv_cookie_t)); |
03916905 PD |
1152 | drc->drc_drr_begin = drr_begin; |
1153 | drc->drc_drrb = &drr_begin->drr_u.drr_begin; | |
1154 | drc->drc_tosnap = tosnap; | |
1155 | drc->drc_tofs = tofs; | |
1156 | drc->drc_force = force; | |
1157 | drc->drc_resumable = resumable; | |
1158 | drc->drc_cred = CRED(); | |
e59a377a | 1159 | drc->drc_proc = curproc; |
03916905 PD |
1160 | drc->drc_clone = (origin != NULL); |
1161 | ||
1162 | if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { | |
1163 | drc->drc_byteswap = B_TRUE; | |
1164 | (void) fletcher_4_incremental_byteswap(drr_begin, | |
1165 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1166 | byteswap_record(drr_begin); | |
1167 | } else if (drc->drc_drrb->drr_magic == DMU_BACKUP_MAGIC) { | |
1168 | (void) fletcher_4_incremental_native(drr_begin, | |
1169 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1170 | } else { | |
1171 | return (SET_ERROR(EINVAL)); | |
1172 | } | |
1173 | ||
da92d5cb | 1174 | drc->drc_fp = fp; |
30af21b0 PD |
1175 | drc->drc_voff = *voffp; |
1176 | drc->drc_featureflags = | |
1177 | DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); | |
1178 | ||
1179 | uint32_t payloadlen = drc->drc_drr_begin->drr_payloadlen; | |
1180 | void *payload = NULL; | |
1181 | if (payloadlen != 0) | |
1182 | payload = kmem_alloc(payloadlen, KM_SLEEP); | |
1183 | ||
1184 | err = receive_read_payload_and_next_header(drc, payloadlen, | |
1185 | payload); | |
1186 | if (err != 0) { | |
1187 | kmem_free(payload, payloadlen); | |
1188 | return (err); | |
1189 | } | |
1190 | if (payloadlen != 0) { | |
1191 | err = nvlist_unpack(payload, payloadlen, &drc->drc_begin_nvl, | |
1192 | KM_SLEEP); | |
1193 | kmem_free(payload, payloadlen); | |
1194 | if (err != 0) { | |
1195 | kmem_free(drc->drc_next_rrd, | |
1196 | sizeof (*drc->drc_next_rrd)); | |
1197 | return (err); | |
1198 | } | |
1199 | } | |
1200 | ||
caf9dd20 BB |
1201 | if (drc->drc_drrb->drr_flags & DRR_FLAG_SPILL_BLOCK) |
1202 | drc->drc_spill = B_TRUE; | |
1203 | ||
03916905 PD |
1204 | drba.drba_origin = origin; |
1205 | drba.drba_cookie = drc; | |
1206 | drba.drba_cred = CRED(); | |
e59a377a | 1207 | drba.drba_proc = curproc; |
03916905 | 1208 | |
30af21b0 PD |
1209 | if (drc->drc_featureflags & DMU_BACKUP_FEATURE_RESUMING) { |
1210 | err = dsl_sync_task(tofs, | |
03916905 | 1211 | dmu_recv_resume_begin_check, dmu_recv_resume_begin_sync, |
30af21b0 PD |
1212 | &drba, 5, ZFS_SPACE_CHECK_NORMAL); |
1213 | } else { | |
03916905 PD |
1214 | /* |
1215 | * For non-raw, non-incremental, non-resuming receives the | |
1216 | * user can specify encryption parameters on the command line | |
1217 | * with "zfs recv -o". For these receives we create a dcp and | |
1218 | * pass it to the sync task. Creating the dcp will implicitly | |
1219 | * remove the encryption params from the localprops nvlist, | |
1220 | * which avoids errors when trying to set these normally | |
1221 | * read-only properties. Any other kind of receive that | |
1222 | * attempts to set these properties will fail as a result. | |
1223 | */ | |
1224 | if ((DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo) & | |
1225 | DMU_BACKUP_FEATURE_RAW) == 0 && | |
1226 | origin == NULL && drc->drc_drrb->drr_fromguid == 0) { | |
1227 | err = dsl_crypto_params_create_nvlist(DCP_CMD_NONE, | |
1228 | localprops, hidden_args, &drba.drba_dcp); | |
03916905 PD |
1229 | } |
1230 | ||
30af21b0 PD |
1231 | if (err == 0) { |
1232 | err = dsl_sync_task(tofs, | |
1233 | dmu_recv_begin_check, dmu_recv_begin_sync, | |
1234 | &drba, 5, ZFS_SPACE_CHECK_NORMAL); | |
1235 | dsl_crypto_params_free(drba.drba_dcp, !!err); | |
1236 | } | |
1237 | } | |
03916905 | 1238 | |
30af21b0 PD |
1239 | if (err != 0) { |
1240 | kmem_free(drc->drc_next_rrd, sizeof (*drc->drc_next_rrd)); | |
1241 | nvlist_free(drc->drc_begin_nvl); | |
03916905 | 1242 | } |
30af21b0 | 1243 | return (err); |
03916905 PD |
1244 | } |
1245 | ||
03916905 | 1246 | static int |
30af21b0 | 1247 | receive_read(dmu_recv_cookie_t *drc, int len, void *buf) |
03916905 PD |
1248 | { |
1249 | int done = 0; | |
1250 | ||
1251 | /* | |
1252 | * The code doesn't rely on this (lengths being multiples of 8). See | |
1253 | * comment in dump_bytes. | |
1254 | */ | |
1255 | ASSERT(len % 8 == 0 || | |
30af21b0 | 1256 | (drc->drc_featureflags & DMU_BACKUP_FEATURE_RAW) != 0); |
03916905 PD |
1257 | |
1258 | while (done < len) { | |
1259 | ssize_t resid; | |
8b240f14 MA |
1260 | zfs_file_t *fp = drc->drc_fp; |
1261 | int err = zfs_file_read(fp, (char *)buf + done, | |
da92d5cb | 1262 | len - done, &resid); |
03916905 PD |
1263 | if (resid == len - done) { |
1264 | /* | |
7145123b PD |
1265 | * Note: ECKSUM or ZFS_ERR_STREAM_TRUNCATED indicates |
1266 | * that the receive was interrupted and can | |
1267 | * potentially be resumed. | |
03916905 | 1268 | */ |
8b240f14 | 1269 | err = SET_ERROR(ZFS_ERR_STREAM_TRUNCATED); |
03916905 | 1270 | } |
30af21b0 | 1271 | drc->drc_voff += len - done - resid; |
03916905 | 1272 | done = len - resid; |
8b240f14 MA |
1273 | if (err != 0) |
1274 | return (err); | |
03916905 PD |
1275 | } |
1276 | ||
30af21b0 | 1277 | drc->drc_bytes_read += len; |
03916905 PD |
1278 | |
1279 | ASSERT3U(done, ==, len); | |
1280 | return (0); | |
1281 | } | |
1282 | ||
03916905 PD |
1283 | static inline uint8_t |
1284 | deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) | |
1285 | { | |
1286 | if (bonus_type == DMU_OT_SA) { | |
1287 | return (1); | |
1288 | } else { | |
1289 | return (1 + | |
1290 | ((DN_OLD_MAX_BONUSLEN - | |
1291 | MIN(DN_OLD_MAX_BONUSLEN, bonus_size)) >> SPA_BLKPTRSHIFT)); | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | static void | |
1296 | save_resume_state(struct receive_writer_arg *rwa, | |
1297 | uint64_t object, uint64_t offset, dmu_tx_t *tx) | |
1298 | { | |
1299 | int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; | |
1300 | ||
1301 | if (!rwa->resumable) | |
1302 | return; | |
1303 | ||
1304 | /* | |
1305 | * We use ds_resume_bytes[] != 0 to indicate that we need to | |
1306 | * update this on disk, so it must not be 0. | |
1307 | */ | |
1308 | ASSERT(rwa->bytes_read != 0); | |
1309 | ||
1310 | /* | |
1311 | * We only resume from write records, which have a valid | |
1312 | * (non-meta-dnode) object number. | |
1313 | */ | |
1314 | ASSERT(object != 0); | |
1315 | ||
1316 | /* | |
1317 | * For resuming to work correctly, we must receive records in order, | |
1318 | * sorted by object,offset. This is checked by the callers, but | |
1319 | * assert it here for good measure. | |
1320 | */ | |
1321 | ASSERT3U(object, >=, rwa->os->os_dsl_dataset->ds_resume_object[txgoff]); | |
1322 | ASSERT(object != rwa->os->os_dsl_dataset->ds_resume_object[txgoff] || | |
1323 | offset >= rwa->os->os_dsl_dataset->ds_resume_offset[txgoff]); | |
1324 | ASSERT3U(rwa->bytes_read, >=, | |
1325 | rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff]); | |
1326 | ||
1327 | rwa->os->os_dsl_dataset->ds_resume_object[txgoff] = object; | |
1328 | rwa->os->os_dsl_dataset->ds_resume_offset[txgoff] = offset; | |
1329 | rwa->os->os_dsl_dataset->ds_resume_bytes[txgoff] = rwa->bytes_read; | |
1330 | } | |
1331 | ||
7bcb7f08 MA |
1332 | static int |
1333 | receive_object_is_same_generation(objset_t *os, uint64_t object, | |
1334 | dmu_object_type_t old_bonus_type, dmu_object_type_t new_bonus_type, | |
1335 | const void *new_bonus, boolean_t *samegenp) | |
1336 | { | |
1337 | zfs_file_info_t zoi; | |
1338 | int err; | |
1339 | ||
1340 | dmu_buf_t *old_bonus_dbuf; | |
1341 | err = dmu_bonus_hold(os, object, FTAG, &old_bonus_dbuf); | |
1342 | if (err != 0) | |
1343 | return (err); | |
1344 | err = dmu_get_file_info(os, old_bonus_type, old_bonus_dbuf->db_data, | |
1345 | &zoi); | |
1346 | dmu_buf_rele(old_bonus_dbuf, FTAG); | |
1347 | if (err != 0) | |
1348 | return (err); | |
1349 | uint64_t old_gen = zoi.zfi_generation; | |
1350 | ||
1351 | err = dmu_get_file_info(os, new_bonus_type, new_bonus, &zoi); | |
1352 | if (err != 0) | |
1353 | return (err); | |
1354 | uint64_t new_gen = zoi.zfi_generation; | |
1355 | ||
1356 | *samegenp = (old_gen == new_gen); | |
1357 | return (0); | |
1358 | } | |
1359 | ||
1360 | static int | |
1361 | receive_handle_existing_object(const struct receive_writer_arg *rwa, | |
1362 | const struct drr_object *drro, const dmu_object_info_t *doi, | |
1363 | const void *bonus_data, | |
1364 | uint64_t *object_to_hold, uint32_t *new_blksz) | |
1365 | { | |
1366 | uint32_t indblksz = drro->drr_indblkshift ? | |
1367 | 1ULL << drro->drr_indblkshift : 0; | |
1368 | int nblkptr = deduce_nblkptr(drro->drr_bonustype, | |
1369 | drro->drr_bonuslen); | |
1370 | uint8_t dn_slots = drro->drr_dn_slots != 0 ? | |
1371 | drro->drr_dn_slots : DNODE_MIN_SLOTS; | |
1372 | boolean_t do_free_range = B_FALSE; | |
1373 | int err; | |
1374 | ||
1375 | *object_to_hold = drro->drr_object; | |
1376 | ||
1377 | /* nblkptr should be bounded by the bonus size and type */ | |
1378 | if (rwa->raw && nblkptr != drro->drr_nblkptr) | |
1379 | return (SET_ERROR(EINVAL)); | |
1380 | ||
1381 | /* | |
1382 | * After the previous send stream, the sending system may | |
1383 | * have freed this object, and then happened to re-allocate | |
1384 | * this object number in a later txg. In this case, we are | |
1385 | * receiving a different logical file, and the block size may | |
1386 | * appear to be different. i.e. we may have a different | |
1387 | * block size for this object than what the send stream says. | |
1388 | * In this case we need to remove the object's contents, | |
1389 | * so that its structure can be changed and then its contents | |
1390 | * entirely replaced by subsequent WRITE records. | |
1391 | * | |
1392 | * If this is a -L (--large-block) incremental stream, and | |
1393 | * the previous stream was not -L, the block size may appear | |
1394 | * to increase. i.e. we may have a smaller block size for | |
1395 | * this object than what the send stream says. In this case | |
1396 | * we need to keep the object's contents and block size | |
1397 | * intact, so that we don't lose parts of the object's | |
1398 | * contents that are not changed by this incremental send | |
1399 | * stream. | |
1400 | * | |
1401 | * We can distinguish between the two above cases by using | |
1402 | * the ZPL's generation number (see | |
1403 | * receive_object_is_same_generation()). However, we only | |
1404 | * want to rely on the generation number when absolutely | |
1405 | * necessary, because with raw receives, the generation is | |
1406 | * encrypted. We also want to minimize dependence on the | |
1407 | * ZPL, so that other types of datasets can also be received | |
1408 | * (e.g. ZVOLs, although note that ZVOLS currently do not | |
1409 | * reallocate their objects or change their structure). | |
1410 | * Therefore, we check a number of different cases where we | |
1411 | * know it is safe to discard the object's contents, before | |
1412 | * using the ZPL's generation number to make the above | |
1413 | * distinction. | |
1414 | */ | |
1415 | if (drro->drr_blksz != doi->doi_data_block_size) { | |
1416 | if (rwa->raw) { | |
1417 | /* | |
1418 | * RAW streams always have large blocks, so | |
1419 | * we are sure that the data is not needed | |
1420 | * due to changing --large-block to be on. | |
1421 | * Which is fortunate since the bonus buffer | |
1422 | * (which contains the ZPL generation) is | |
1423 | * encrypted, and the key might not be | |
1424 | * loaded. | |
1425 | */ | |
1426 | do_free_range = B_TRUE; | |
1427 | } else if (rwa->full) { | |
1428 | /* | |
1429 | * This is a full send stream, so it always | |
1430 | * replaces what we have. Even if the | |
1431 | * generation numbers happen to match, this | |
1432 | * can not actually be the same logical file. | |
1433 | * This is relevant when receiving a full | |
1434 | * send as a clone. | |
1435 | */ | |
1436 | do_free_range = B_TRUE; | |
1437 | } else if (drro->drr_type != | |
1438 | DMU_OT_PLAIN_FILE_CONTENTS || | |
1439 | doi->doi_type != DMU_OT_PLAIN_FILE_CONTENTS) { | |
1440 | /* | |
1441 | * PLAIN_FILE_CONTENTS are the only type of | |
1442 | * objects that have ever been stored with | |
1443 | * large blocks, so we don't need the special | |
1444 | * logic below. ZAP blocks can shrink (when | |
1445 | * there's only one block), so we don't want | |
1446 | * to hit the error below about block size | |
1447 | * only increasing. | |
1448 | */ | |
1449 | do_free_range = B_TRUE; | |
1450 | } else if (doi->doi_max_offset <= | |
1451 | doi->doi_data_block_size) { | |
1452 | /* | |
1453 | * There is only one block. We can free it, | |
1454 | * because its contents will be replaced by a | |
1455 | * WRITE record. This can not be the no-L -> | |
1456 | * -L case, because the no-L case would have | |
1457 | * resulted in multiple blocks. If we | |
1458 | * supported -L -> no-L, it would not be safe | |
1459 | * to free the file's contents. Fortunately, | |
1460 | * that is not allowed (see | |
1461 | * recv_check_large_blocks()). | |
1462 | */ | |
1463 | do_free_range = B_TRUE; | |
1464 | } else { | |
1465 | boolean_t is_same_gen; | |
1466 | err = receive_object_is_same_generation(rwa->os, | |
1467 | drro->drr_object, doi->doi_bonus_type, | |
1468 | drro->drr_bonustype, bonus_data, &is_same_gen); | |
1469 | if (err != 0) | |
1470 | return (SET_ERROR(EINVAL)); | |
1471 | ||
1472 | if (is_same_gen) { | |
1473 | /* | |
1474 | * This is the same logical file, and | |
1475 | * the block size must be increasing. | |
1476 | * It could only decrease if | |
1477 | * --large-block was changed to be | |
1478 | * off, which is checked in | |
1479 | * recv_check_large_blocks(). | |
1480 | */ | |
1481 | if (drro->drr_blksz <= | |
1482 | doi->doi_data_block_size) | |
1483 | return (SET_ERROR(EINVAL)); | |
1484 | /* | |
1485 | * We keep the existing blocksize and | |
1486 | * contents. | |
1487 | */ | |
1488 | *new_blksz = | |
1489 | doi->doi_data_block_size; | |
1490 | } else { | |
1491 | do_free_range = B_TRUE; | |
1492 | } | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | /* nblkptr can only decrease if the object was reallocated */ | |
1497 | if (nblkptr < doi->doi_nblkptr) | |
1498 | do_free_range = B_TRUE; | |
1499 | ||
1500 | /* number of slots can only change on reallocation */ | |
1501 | if (dn_slots != doi->doi_dnodesize >> DNODE_SHIFT) | |
1502 | do_free_range = B_TRUE; | |
1503 | ||
1504 | /* | |
1505 | * For raw sends we also check a few other fields to | |
1506 | * ensure we are preserving the objset structure exactly | |
1507 | * as it was on the receive side: | |
1508 | * - A changed indirect block size | |
1509 | * - A smaller nlevels | |
1510 | */ | |
1511 | if (rwa->raw) { | |
1512 | if (indblksz != doi->doi_metadata_block_size) | |
1513 | do_free_range = B_TRUE; | |
1514 | if (drro->drr_nlevels < doi->doi_indirection) | |
1515 | do_free_range = B_TRUE; | |
1516 | } | |
1517 | ||
1518 | if (do_free_range) { | |
1519 | err = dmu_free_long_range(rwa->os, drro->drr_object, | |
1520 | 0, DMU_OBJECT_END); | |
1521 | if (err != 0) | |
1522 | return (SET_ERROR(EINVAL)); | |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * The dmu does not currently support decreasing nlevels | |
1527 | * or changing the number of dnode slots on an object. For | |
1528 | * non-raw sends, this does not matter and the new object | |
1529 | * can just use the previous one's nlevels. For raw sends, | |
1530 | * however, the structure of the received dnode (including | |
1531 | * nlevels and dnode slots) must match that of the send | |
1532 | * side. Therefore, instead of using dmu_object_reclaim(), | |
1533 | * we must free the object completely and call | |
1534 | * dmu_object_claim_dnsize() instead. | |
1535 | */ | |
1536 | if ((rwa->raw && drro->drr_nlevels < doi->doi_indirection) || | |
1537 | dn_slots != doi->doi_dnodesize >> DNODE_SHIFT) { | |
1538 | err = dmu_free_long_object(rwa->os, drro->drr_object); | |
1539 | if (err != 0) | |
1540 | return (SET_ERROR(EINVAL)); | |
1541 | ||
1542 | txg_wait_synced(dmu_objset_pool(rwa->os), 0); | |
1543 | *object_to_hold = DMU_NEW_OBJECT; | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * For raw receives, free everything beyond the new incoming | |
1548 | * maxblkid. Normally this would be done with a DRR_FREE | |
1549 | * record that would come after this DRR_OBJECT record is | |
1550 | * processed. However, for raw receives we manually set the | |
1551 | * maxblkid from the drr_maxblkid and so we must first free | |
1552 | * everything above that blkid to ensure the DMU is always | |
1553 | * consistent with itself. We will never free the first block | |
1554 | * of the object here because a maxblkid of 0 could indicate | |
1555 | * an object with a single block or one with no blocks. This | |
1556 | * free may be skipped when dmu_free_long_range() was called | |
1557 | * above since it covers the entire object's contents. | |
1558 | */ | |
1559 | if (rwa->raw && *object_to_hold != DMU_NEW_OBJECT && !do_free_range) { | |
1560 | err = dmu_free_long_range(rwa->os, drro->drr_object, | |
1561 | (drro->drr_maxblkid + 1) * doi->doi_data_block_size, | |
1562 | DMU_OBJECT_END); | |
1563 | if (err != 0) | |
1564 | return (SET_ERROR(EINVAL)); | |
1565 | } | |
1566 | return (0); | |
1567 | } | |
1568 | ||
03916905 PD |
1569 | noinline static int |
1570 | receive_object(struct receive_writer_arg *rwa, struct drr_object *drro, | |
1571 | void *data) | |
1572 | { | |
1573 | dmu_object_info_t doi; | |
1574 | dmu_tx_t *tx; | |
03916905 | 1575 | int err; |
7bcb7f08 | 1576 | uint32_t new_blksz = drro->drr_blksz; |
03916905 PD |
1577 | uint8_t dn_slots = drro->drr_dn_slots != 0 ? |
1578 | drro->drr_dn_slots : DNODE_MIN_SLOTS; | |
1579 | ||
1580 | if (drro->drr_type == DMU_OT_NONE || | |
1581 | !DMU_OT_IS_VALID(drro->drr_type) || | |
1582 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
1583 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || | |
1584 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || | |
1585 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
1586 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
1587 | drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || | |
1588 | drro->drr_bonuslen > | |
1589 | DN_BONUS_SIZE(spa_maxdnodesize(dmu_objset_spa(rwa->os))) || | |
1590 | dn_slots > | |
30af21b0 | 1591 | (spa_maxdnodesize(dmu_objset_spa(rwa->os)) >> DNODE_SHIFT)) { |
03916905 PD |
1592 | return (SET_ERROR(EINVAL)); |
1593 | } | |
1594 | ||
1595 | if (rwa->raw) { | |
1596 | /* | |
1597 | * We should have received a DRR_OBJECT_RANGE record | |
1598 | * containing this block and stored it in rwa. | |
1599 | */ | |
1600 | if (drro->drr_object < rwa->or_firstobj || | |
1601 | drro->drr_object >= rwa->or_firstobj + rwa->or_numslots || | |
1602 | drro->drr_raw_bonuslen < drro->drr_bonuslen || | |
1603 | drro->drr_indblkshift > SPA_MAXBLOCKSHIFT || | |
1604 | drro->drr_nlevels > DN_MAX_LEVELS || | |
1605 | drro->drr_nblkptr > DN_MAX_NBLKPTR || | |
1606 | DN_SLOTS_TO_BONUSLEN(dn_slots) < | |
1607 | drro->drr_raw_bonuslen) | |
1608 | return (SET_ERROR(EINVAL)); | |
1609 | } else { | |
caf9dd20 BB |
1610 | /* |
1611 | * The DRR_OBJECT_SPILL flag is valid when the DRR_BEGIN | |
1612 | * record indicates this by setting DRR_FLAG_SPILL_BLOCK. | |
1613 | */ | |
1614 | if (((drro->drr_flags & ~(DRR_OBJECT_SPILL))) || | |
1615 | (!rwa->spill && DRR_OBJECT_HAS_SPILL(drro->drr_flags))) { | |
1616 | return (SET_ERROR(EINVAL)); | |
1617 | } | |
1618 | ||
1619 | if (drro->drr_raw_bonuslen != 0 || drro->drr_nblkptr != 0 || | |
1620 | drro->drr_indblkshift != 0 || drro->drr_nlevels != 0) { | |
03916905 | 1621 | return (SET_ERROR(EINVAL)); |
caf9dd20 | 1622 | } |
03916905 PD |
1623 | } |
1624 | ||
1625 | err = dmu_object_info(rwa->os, drro->drr_object, &doi); | |
30af21b0 | 1626 | |
03916905 PD |
1627 | if (err != 0 && err != ENOENT && err != EEXIST) |
1628 | return (SET_ERROR(EINVAL)); | |
1629 | ||
1630 | if (drro->drr_object > rwa->max_object) | |
1631 | rwa->max_object = drro->drr_object; | |
1632 | ||
1633 | /* | |
1634 | * If we are losing blkptrs or changing the block size this must | |
1635 | * be a new file instance. We must clear out the previous file | |
1636 | * contents before we can change this type of metadata in the dnode. | |
1637 | * Raw receives will also check that the indirect structure of the | |
1638 | * dnode hasn't changed. | |
1639 | */ | |
7bcb7f08 | 1640 | uint64_t object_to_hold; |
03916905 | 1641 | if (err == 0) { |
7bcb7f08 MA |
1642 | err = receive_handle_existing_object(rwa, drro, &doi, data, |
1643 | &object_to_hold, &new_blksz); | |
03916905 PD |
1644 | } else if (err == EEXIST) { |
1645 | /* | |
1646 | * The object requested is currently an interior slot of a | |
1647 | * multi-slot dnode. This will be resolved when the next txg | |
1648 | * is synced out, since the send stream will have told us | |
1649 | * to free this slot when we freed the associated dnode | |
1650 | * earlier in the stream. | |
1651 | */ | |
1652 | txg_wait_synced(dmu_objset_pool(rwa->os), 0); | |
b92f5d9f BB |
1653 | |
1654 | if (dmu_object_info(rwa->os, drro->drr_object, NULL) != ENOENT) | |
1655 | return (SET_ERROR(EINVAL)); | |
1656 | ||
1657 | /* object was freed and we are about to allocate a new one */ | |
7bcb7f08 | 1658 | object_to_hold = DMU_NEW_OBJECT; |
03916905 PD |
1659 | } else { |
1660 | /* object is free and we are about to allocate a new one */ | |
7bcb7f08 | 1661 | object_to_hold = DMU_NEW_OBJECT; |
03916905 PD |
1662 | } |
1663 | ||
1664 | /* | |
1665 | * If this is a multi-slot dnode there is a chance that this | |
1666 | * object will expand into a slot that is already used by | |
1667 | * another object from the previous snapshot. We must free | |
1668 | * these objects before we attempt to allocate the new dnode. | |
1669 | */ | |
1670 | if (dn_slots > 1) { | |
1671 | boolean_t need_sync = B_FALSE; | |
1672 | ||
1673 | for (uint64_t slot = drro->drr_object + 1; | |
1674 | slot < drro->drr_object + dn_slots; | |
1675 | slot++) { | |
1676 | dmu_object_info_t slot_doi; | |
1677 | ||
1678 | err = dmu_object_info(rwa->os, slot, &slot_doi); | |
1679 | if (err == ENOENT || err == EEXIST) | |
1680 | continue; | |
1681 | else if (err != 0) | |
1682 | return (err); | |
1683 | ||
1684 | err = dmu_free_long_object(rwa->os, slot); | |
03916905 PD |
1685 | if (err != 0) |
1686 | return (err); | |
1687 | ||
1688 | need_sync = B_TRUE; | |
1689 | } | |
1690 | ||
1691 | if (need_sync) | |
1692 | txg_wait_synced(dmu_objset_pool(rwa->os), 0); | |
1693 | } | |
1694 | ||
1695 | tx = dmu_tx_create(rwa->os); | |
7bcb7f08 MA |
1696 | dmu_tx_hold_bonus(tx, object_to_hold); |
1697 | dmu_tx_hold_write(tx, object_to_hold, 0, 0); | |
03916905 PD |
1698 | err = dmu_tx_assign(tx, TXG_WAIT); |
1699 | if (err != 0) { | |
1700 | dmu_tx_abort(tx); | |
1701 | return (err); | |
1702 | } | |
1703 | ||
7bcb7f08 | 1704 | if (object_to_hold == DMU_NEW_OBJECT) { |
caf9dd20 | 1705 | /* Currently free, wants to be allocated */ |
03916905 | 1706 | err = dmu_object_claim_dnsize(rwa->os, drro->drr_object, |
7bcb7f08 | 1707 | drro->drr_type, new_blksz, |
03916905 PD |
1708 | drro->drr_bonustype, drro->drr_bonuslen, |
1709 | dn_slots << DNODE_SHIFT, tx); | |
1710 | } else if (drro->drr_type != doi.doi_type || | |
7bcb7f08 | 1711 | new_blksz != doi.doi_data_block_size || |
03916905 PD |
1712 | drro->drr_bonustype != doi.doi_bonus_type || |
1713 | drro->drr_bonuslen != doi.doi_bonus_size) { | |
caf9dd20 | 1714 | /* Currently allocated, but with different properties */ |
03916905 | 1715 | err = dmu_object_reclaim_dnsize(rwa->os, drro->drr_object, |
7bcb7f08 | 1716 | drro->drr_type, new_blksz, |
03916905 | 1717 | drro->drr_bonustype, drro->drr_bonuslen, |
caf9dd20 BB |
1718 | dn_slots << DNODE_SHIFT, rwa->spill ? |
1719 | DRR_OBJECT_HAS_SPILL(drro->drr_flags) : B_FALSE, tx); | |
1720 | } else if (rwa->spill && !DRR_OBJECT_HAS_SPILL(drro->drr_flags)) { | |
1721 | /* | |
1722 | * Currently allocated, the existing version of this object | |
1723 | * may reference a spill block that is no longer allocated | |
1724 | * at the source and needs to be freed. | |
1725 | */ | |
1726 | err = dmu_object_rm_spill(rwa->os, drro->drr_object, tx); | |
03916905 | 1727 | } |
3fa93bb8 | 1728 | |
03916905 PD |
1729 | if (err != 0) { |
1730 | dmu_tx_commit(tx); | |
1731 | return (SET_ERROR(EINVAL)); | |
1732 | } | |
1733 | ||
1734 | if (rwa->or_crypt_params_present) { | |
1735 | /* | |
1736 | * Set the crypt params for the buffer associated with this | |
1737 | * range of dnodes. This causes the blkptr_t to have the | |
1738 | * same crypt params (byteorder, salt, iv, mac) as on the | |
1739 | * sending side. | |
1740 | * | |
1741 | * Since we are committing this tx now, it is possible for | |
1742 | * the dnode block to end up on-disk with the incorrect MAC, | |
1743 | * if subsequent objects in this block are received in a | |
1744 | * different txg. However, since the dataset is marked as | |
1745 | * inconsistent, no code paths will do a non-raw read (or | |
1746 | * decrypt the block / verify the MAC). The receive code and | |
1747 | * scrub code can safely do raw reads and verify the | |
1748 | * checksum. They don't need to verify the MAC. | |
1749 | */ | |
1750 | dmu_buf_t *db = NULL; | |
1751 | uint64_t offset = rwa->or_firstobj * DNODE_MIN_SIZE; | |
1752 | ||
1753 | err = dmu_buf_hold_by_dnode(DMU_META_DNODE(rwa->os), | |
1754 | offset, FTAG, &db, DMU_READ_PREFETCH | DMU_READ_NO_DECRYPT); | |
1755 | if (err != 0) { | |
1756 | dmu_tx_commit(tx); | |
1757 | return (SET_ERROR(EINVAL)); | |
1758 | } | |
1759 | ||
1760 | dmu_buf_set_crypt_params(db, rwa->or_byteorder, | |
1761 | rwa->or_salt, rwa->or_iv, rwa->or_mac, tx); | |
1762 | ||
1763 | dmu_buf_rele(db, FTAG); | |
1764 | ||
1765 | rwa->or_crypt_params_present = B_FALSE; | |
1766 | } | |
1767 | ||
1768 | dmu_object_set_checksum(rwa->os, drro->drr_object, | |
1769 | drro->drr_checksumtype, tx); | |
1770 | dmu_object_set_compress(rwa->os, drro->drr_object, | |
1771 | drro->drr_compress, tx); | |
1772 | ||
1773 | /* handle more restrictive dnode structuring for raw recvs */ | |
1774 | if (rwa->raw) { | |
1775 | /* | |
369aa501 TC |
1776 | * Set the indirect block size, block shift, nlevels. |
1777 | * This will not fail because we ensured all of the | |
1778 | * blocks were freed earlier if this is a new object. | |
1779 | * For non-new objects block size and indirect block | |
1780 | * shift cannot change and nlevels can only increase. | |
03916905 | 1781 | */ |
7bcb7f08 | 1782 | ASSERT3U(new_blksz, ==, drro->drr_blksz); |
03916905 PD |
1783 | VERIFY0(dmu_object_set_blocksize(rwa->os, drro->drr_object, |
1784 | drro->drr_blksz, drro->drr_indblkshift, tx)); | |
1785 | VERIFY0(dmu_object_set_nlevels(rwa->os, drro->drr_object, | |
1786 | drro->drr_nlevels, tx)); | |
369aa501 TC |
1787 | |
1788 | /* | |
c2c6eadf TC |
1789 | * Set the maxblkid. This will always succeed because |
1790 | * we freed all blocks beyond the new maxblkid above. | |
369aa501 | 1791 | */ |
03916905 PD |
1792 | VERIFY0(dmu_object_set_maxblkid(rwa->os, drro->drr_object, |
1793 | drro->drr_maxblkid, tx)); | |
1794 | } | |
1795 | ||
1796 | if (data != NULL) { | |
1797 | dmu_buf_t *db; | |
6955b401 | 1798 | dnode_t *dn; |
03916905 PD |
1799 | uint32_t flags = DMU_READ_NO_PREFETCH; |
1800 | ||
1801 | if (rwa->raw) | |
1802 | flags |= DMU_READ_NO_DECRYPT; | |
1803 | ||
6955b401 BB |
1804 | VERIFY0(dnode_hold(rwa->os, drro->drr_object, FTAG, &dn)); |
1805 | VERIFY0(dmu_bonus_hold_by_dnode(dn, FTAG, &db, flags)); | |
1806 | ||
03916905 PD |
1807 | dmu_buf_will_dirty(db, tx); |
1808 | ||
1809 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
861166b0 | 1810 | memcpy(db->db_data, data, DRR_OBJECT_PAYLOAD_SIZE(drro)); |
03916905 PD |
1811 | |
1812 | /* | |
1813 | * Raw bonus buffers have their byteorder determined by the | |
1814 | * DRR_OBJECT_RANGE record. | |
1815 | */ | |
1816 | if (rwa->byteswap && !rwa->raw) { | |
1817 | dmu_object_byteswap_t byteswap = | |
1818 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
1819 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
1820 | DRR_OBJECT_PAYLOAD_SIZE(drro)); | |
1821 | } | |
1822 | dmu_buf_rele(db, FTAG); | |
6955b401 | 1823 | dnode_rele(dn, FTAG); |
03916905 PD |
1824 | } |
1825 | dmu_tx_commit(tx); | |
1826 | ||
1827 | return (0); | |
1828 | } | |
1829 | ||
03916905 PD |
1830 | noinline static int |
1831 | receive_freeobjects(struct receive_writer_arg *rwa, | |
1832 | struct drr_freeobjects *drrfo) | |
1833 | { | |
1834 | uint64_t obj; | |
1835 | int next_err = 0; | |
1836 | ||
1837 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
1838 | return (SET_ERROR(EINVAL)); | |
1839 | ||
1840 | for (obj = drrfo->drr_firstobj == 0 ? 1 : drrfo->drr_firstobj; | |
30af21b0 PD |
1841 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs && |
1842 | obj < DN_MAX_OBJECT && next_err == 0; | |
03916905 PD |
1843 | next_err = dmu_object_next(rwa->os, &obj, FALSE, 0)) { |
1844 | dmu_object_info_t doi; | |
1845 | int err; | |
1846 | ||
1847 | err = dmu_object_info(rwa->os, obj, &doi); | |
1848 | if (err == ENOENT) | |
1849 | continue; | |
1850 | else if (err != 0) | |
1851 | return (err); | |
1852 | ||
1853 | err = dmu_free_long_object(rwa->os, obj); | |
1854 | ||
1855 | if (err != 0) | |
1856 | return (err); | |
03916905 PD |
1857 | } |
1858 | if (next_err != ESRCH) | |
1859 | return (next_err); | |
1860 | return (0); | |
1861 | } | |
1862 | ||
7261fc2e MA |
1863 | /* |
1864 | * Note: if this fails, the caller will clean up any records left on the | |
1865 | * rwa->write_batch list. | |
1866 | */ | |
1867 | static int | |
1868 | flush_write_batch_impl(struct receive_writer_arg *rwa) | |
03916905 | 1869 | { |
03916905 | 1870 | dnode_t *dn; |
7261fc2e MA |
1871 | int err; |
1872 | ||
1873 | if (dnode_hold(rwa->os, rwa->last_object, FTAG, &dn) != 0) | |
1874 | return (SET_ERROR(EINVAL)); | |
1875 | ||
1876 | struct receive_record_arg *last_rrd = list_tail(&rwa->write_batch); | |
1877 | struct drr_write *last_drrw = &last_rrd->header.drr_u.drr_write; | |
1878 | ||
1879 | struct receive_record_arg *first_rrd = list_head(&rwa->write_batch); | |
1880 | struct drr_write *first_drrw = &first_rrd->header.drr_u.drr_write; | |
1881 | ||
1882 | ASSERT3U(rwa->last_object, ==, last_drrw->drr_object); | |
1883 | ASSERT3U(rwa->last_offset, ==, last_drrw->drr_offset); | |
1884 | ||
1885 | dmu_tx_t *tx = dmu_tx_create(rwa->os); | |
1886 | dmu_tx_hold_write_by_dnode(tx, dn, first_drrw->drr_offset, | |
1887 | last_drrw->drr_offset - first_drrw->drr_offset + | |
1888 | last_drrw->drr_logical_size); | |
1889 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1890 | if (err != 0) { | |
1891 | dmu_tx_abort(tx); | |
1892 | dnode_rele(dn, FTAG); | |
1893 | return (err); | |
1894 | } | |
1895 | ||
1896 | struct receive_record_arg *rrd; | |
1897 | while ((rrd = list_head(&rwa->write_batch)) != NULL) { | |
1898 | struct drr_write *drrw = &rrd->header.drr_u.drr_write; | |
ba67d821 | 1899 | abd_t *abd = rrd->abd; |
7261fc2e MA |
1900 | |
1901 | ASSERT3U(drrw->drr_object, ==, rwa->last_object); | |
1902 | ||
ba67d821 MA |
1903 | if (drrw->drr_logical_size != dn->dn_datablksz) { |
1904 | /* | |
1905 | * The WRITE record is larger than the object's block | |
1906 | * size. We must be receiving an incremental | |
1907 | * large-block stream into a dataset that previously did | |
1908 | * a non-large-block receive. Lightweight writes must | |
1909 | * be exactly one block, so we need to decompress the | |
1910 | * data (if compressed) and do a normal dmu_write(). | |
1911 | */ | |
7bcb7f08 | 1912 | ASSERT3U(drrw->drr_logical_size, >, dn->dn_datablksz); |
ba67d821 MA |
1913 | if (DRR_WRITE_COMPRESSED(drrw)) { |
1914 | abd_t *decomp_abd = | |
1915 | abd_alloc_linear(drrw->drr_logical_size, | |
1916 | B_FALSE); | |
1917 | ||
1918 | err = zio_decompress_data( | |
1919 | drrw->drr_compressiontype, | |
1920 | abd, abd_to_buf(decomp_abd), | |
1921 | abd_get_size(abd), | |
1922 | abd_get_size(decomp_abd), NULL); | |
1923 | ||
1924 | if (err == 0) { | |
1925 | dmu_write_by_dnode(dn, | |
1926 | drrw->drr_offset, | |
1927 | drrw->drr_logical_size, | |
1928 | abd_to_buf(decomp_abd), tx); | |
1929 | } | |
1930 | abd_free(decomp_abd); | |
1931 | } else { | |
1932 | dmu_write_by_dnode(dn, | |
1933 | drrw->drr_offset, | |
1934 | drrw->drr_logical_size, | |
1935 | abd_to_buf(abd), tx); | |
1936 | } | |
1937 | if (err == 0) | |
1938 | abd_free(abd); | |
1939 | } else { | |
1940 | zio_prop_t zp; | |
1941 | dmu_write_policy(rwa->os, dn, 0, 0, &zp); | |
1942 | ||
1943 | enum zio_flag zio_flags = 0; | |
1944 | ||
1945 | if (rwa->raw) { | |
1946 | zp.zp_encrypt = B_TRUE; | |
1947 | zp.zp_compress = drrw->drr_compressiontype; | |
1948 | zp.zp_byteorder = ZFS_HOST_BYTEORDER ^ | |
1949 | !!DRR_IS_RAW_BYTESWAPPED(drrw->drr_flags) ^ | |
1950 | rwa->byteswap; | |
861166b0 | 1951 | memcpy(zp.zp_salt, drrw->drr_salt, |
ba67d821 | 1952 | ZIO_DATA_SALT_LEN); |
861166b0 | 1953 | memcpy(zp.zp_iv, drrw->drr_iv, |
ba67d821 | 1954 | ZIO_DATA_IV_LEN); |
861166b0 | 1955 | memcpy(zp.zp_mac, drrw->drr_mac, |
ba67d821 MA |
1956 | ZIO_DATA_MAC_LEN); |
1957 | if (DMU_OT_IS_ENCRYPTED(zp.zp_type)) { | |
1958 | zp.zp_nopwrite = B_FALSE; | |
1959 | zp.zp_copies = MIN(zp.zp_copies, | |
1960 | SPA_DVAS_PER_BP - 1); | |
1961 | } | |
1962 | zio_flags |= ZIO_FLAG_RAW; | |
1963 | } else if (DRR_WRITE_COMPRESSED(drrw)) { | |
1964 | ASSERT3U(drrw->drr_compressed_size, >, 0); | |
1965 | ASSERT3U(drrw->drr_logical_size, >=, | |
1966 | drrw->drr_compressed_size); | |
1967 | zp.zp_compress = drrw->drr_compressiontype; | |
1968 | zio_flags |= ZIO_FLAG_RAW_COMPRESS; | |
1969 | } else if (rwa->byteswap) { | |
1970 | /* | |
1971 | * Note: compressed blocks never need to be | |
1972 | * byteswapped, because WRITE records for | |
1973 | * metadata blocks are never compressed. The | |
1974 | * exception is raw streams, which are written | |
1975 | * in the original byteorder, and the byteorder | |
1976 | * bit is preserved in the BP by setting | |
1977 | * zp_byteorder above. | |
1978 | */ | |
1979 | dmu_object_byteswap_t byteswap = | |
1980 | DMU_OT_BYTESWAP(drrw->drr_type); | |
1981 | dmu_ot_byteswap[byteswap].ob_func( | |
1982 | abd_to_buf(abd), | |
1983 | DRR_WRITE_PAYLOAD_SIZE(drrw)); | |
1984 | } | |
7bcb7f08 MA |
1985 | |
1986 | /* | |
ba67d821 MA |
1987 | * Since this data can't be read until the receive |
1988 | * completes, we can do a "lightweight" write for | |
1989 | * improved performance. | |
7bcb7f08 | 1990 | */ |
ba67d821 MA |
1991 | err = dmu_lightweight_write_by_dnode(dn, |
1992 | drrw->drr_offset, abd, &zp, zio_flags, tx); | |
7bcb7f08 MA |
1993 | } |
1994 | ||
7261fc2e MA |
1995 | if (err != 0) { |
1996 | /* | |
1997 | * This rrd is left on the list, so the caller will | |
ba67d821 | 1998 | * free it (and the abd). |
7261fc2e MA |
1999 | */ |
2000 | break; | |
2001 | } | |
2002 | ||
2003 | /* | |
2004 | * Note: If the receive fails, we want the resume stream to | |
2005 | * start with the same record that we last successfully | |
2006 | * received (as opposed to the next record), so that we can | |
2007 | * verify that we are resuming from the correct location. | |
2008 | */ | |
2009 | save_resume_state(rwa, drrw->drr_object, drrw->drr_offset, tx); | |
2010 | ||
2011 | list_remove(&rwa->write_batch, rrd); | |
2012 | kmem_free(rrd, sizeof (*rrd)); | |
2013 | } | |
2014 | ||
2015 | dmu_tx_commit(tx); | |
2016 | dnode_rele(dn, FTAG); | |
2017 | return (err); | |
2018 | } | |
2019 | ||
2020 | noinline static int | |
2021 | flush_write_batch(struct receive_writer_arg *rwa) | |
2022 | { | |
2023 | if (list_is_empty(&rwa->write_batch)) | |
2024 | return (0); | |
2025 | int err = rwa->err; | |
2026 | if (err == 0) | |
2027 | err = flush_write_batch_impl(rwa); | |
2028 | if (err != 0) { | |
2029 | struct receive_record_arg *rrd; | |
2030 | while ((rrd = list_remove_head(&rwa->write_batch)) != NULL) { | |
ba67d821 | 2031 | abd_free(rrd->abd); |
7261fc2e MA |
2032 | kmem_free(rrd, sizeof (*rrd)); |
2033 | } | |
2034 | } | |
2035 | ASSERT(list_is_empty(&rwa->write_batch)); | |
2036 | return (err); | |
2037 | } | |
2038 | ||
2039 | noinline static int | |
2040 | receive_process_write_record(struct receive_writer_arg *rwa, | |
2041 | struct receive_record_arg *rrd) | |
2042 | { | |
2043 | int err = 0; | |
2044 | ||
2045 | ASSERT3U(rrd->header.drr_type, ==, DRR_WRITE); | |
2046 | struct drr_write *drrw = &rrd->header.drr_u.drr_write; | |
03916905 PD |
2047 | |
2048 | if (drrw->drr_offset + drrw->drr_logical_size < drrw->drr_offset || | |
2049 | !DMU_OT_IS_VALID(drrw->drr_type)) | |
2050 | return (SET_ERROR(EINVAL)); | |
2051 | ||
2052 | /* | |
2053 | * For resuming to work, records must be in increasing order | |
2054 | * by (object, offset). | |
2055 | */ | |
2056 | if (drrw->drr_object < rwa->last_object || | |
2057 | (drrw->drr_object == rwa->last_object && | |
2058 | drrw->drr_offset < rwa->last_offset)) { | |
2059 | return (SET_ERROR(EINVAL)); | |
2060 | } | |
7261fc2e MA |
2061 | |
2062 | struct receive_record_arg *first_rrd = list_head(&rwa->write_batch); | |
2063 | struct drr_write *first_drrw = &first_rrd->header.drr_u.drr_write; | |
2064 | uint64_t batch_size = | |
2065 | MIN(zfs_recv_write_batch_size, DMU_MAX_ACCESS / 2); | |
2066 | if (first_rrd != NULL && | |
2067 | (drrw->drr_object != first_drrw->drr_object || | |
2068 | drrw->drr_offset >= first_drrw->drr_offset + batch_size)) { | |
2069 | err = flush_write_batch(rwa); | |
2070 | if (err != 0) | |
2071 | return (err); | |
2072 | } | |
2073 | ||
03916905 PD |
2074 | rwa->last_object = drrw->drr_object; |
2075 | rwa->last_offset = drrw->drr_offset; | |
2076 | ||
2077 | if (rwa->last_object > rwa->max_object) | |
2078 | rwa->max_object = rwa->last_object; | |
2079 | ||
7261fc2e | 2080 | list_insert_tail(&rwa->write_batch, rrd); |
03916905 | 2081 | /* |
7261fc2e MA |
2082 | * Return EAGAIN to indicate that we will use this rrd again, |
2083 | * so the caller should not free it | |
03916905 | 2084 | */ |
7261fc2e | 2085 | return (EAGAIN); |
03916905 PD |
2086 | } |
2087 | ||
03916905 PD |
2088 | static int |
2089 | receive_write_embedded(struct receive_writer_arg *rwa, | |
2090 | struct drr_write_embedded *drrwe, void *data) | |
2091 | { | |
2092 | dmu_tx_t *tx; | |
2093 | int err; | |
2094 | ||
2095 | if (drrwe->drr_offset + drrwe->drr_length < drrwe->drr_offset) | |
2096 | return (SET_ERROR(EINVAL)); | |
2097 | ||
2098 | if (drrwe->drr_psize > BPE_PAYLOAD_SIZE) | |
2099 | return (SET_ERROR(EINVAL)); | |
2100 | ||
2101 | if (drrwe->drr_etype >= NUM_BP_EMBEDDED_TYPES) | |
2102 | return (SET_ERROR(EINVAL)); | |
2103 | if (drrwe->drr_compression >= ZIO_COMPRESS_FUNCTIONS) | |
2104 | return (SET_ERROR(EINVAL)); | |
2105 | if (rwa->raw) | |
2106 | return (SET_ERROR(EINVAL)); | |
2107 | ||
2108 | if (drrwe->drr_object > rwa->max_object) | |
2109 | rwa->max_object = drrwe->drr_object; | |
2110 | ||
2111 | tx = dmu_tx_create(rwa->os); | |
2112 | ||
2113 | dmu_tx_hold_write(tx, drrwe->drr_object, | |
2114 | drrwe->drr_offset, drrwe->drr_length); | |
2115 | err = dmu_tx_assign(tx, TXG_WAIT); | |
2116 | if (err != 0) { | |
2117 | dmu_tx_abort(tx); | |
2118 | return (err); | |
2119 | } | |
2120 | ||
2121 | dmu_write_embedded(rwa->os, drrwe->drr_object, | |
2122 | drrwe->drr_offset, data, drrwe->drr_etype, | |
2123 | drrwe->drr_compression, drrwe->drr_lsize, drrwe->drr_psize, | |
2124 | rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); | |
2125 | ||
2126 | /* See comment in restore_write. */ | |
2127 | save_resume_state(rwa, drrwe->drr_object, drrwe->drr_offset, tx); | |
2128 | dmu_tx_commit(tx); | |
2129 | return (0); | |
2130 | } | |
2131 | ||
2132 | static int | |
2133 | receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, | |
ba67d821 | 2134 | abd_t *abd) |
03916905 | 2135 | { |
03916905 PD |
2136 | dmu_buf_t *db, *db_spill; |
2137 | int err; | |
03916905 PD |
2138 | |
2139 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
2140 | drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) | |
2141 | return (SET_ERROR(EINVAL)); | |
2142 | ||
caf9dd20 BB |
2143 | /* |
2144 | * This is an unmodified spill block which was added to the stream | |
2145 | * to resolve an issue with incorrectly removing spill blocks. It | |
2146 | * should be ignored by current versions of the code which support | |
2147 | * the DRR_FLAG_SPILL_BLOCK flag. | |
2148 | */ | |
2149 | if (rwa->spill && DRR_SPILL_IS_UNMODIFIED(drrs->drr_flags)) { | |
ba67d821 | 2150 | abd_free(abd); |
caf9dd20 BB |
2151 | return (0); |
2152 | } | |
2153 | ||
03916905 PD |
2154 | if (rwa->raw) { |
2155 | if (!DMU_OT_IS_VALID(drrs->drr_type) || | |
2156 | drrs->drr_compressiontype >= ZIO_COMPRESS_FUNCTIONS || | |
2157 | drrs->drr_compressed_size == 0) | |
2158 | return (SET_ERROR(EINVAL)); | |
03916905 PD |
2159 | } |
2160 | ||
2161 | if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) | |
2162 | return (SET_ERROR(EINVAL)); | |
2163 | ||
2164 | if (drrs->drr_object > rwa->max_object) | |
2165 | rwa->max_object = drrs->drr_object; | |
2166 | ||
2167 | VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); | |
2168 | if ((err = dmu_spill_hold_by_bonus(db, DMU_READ_NO_DECRYPT, FTAG, | |
2169 | &db_spill)) != 0) { | |
2170 | dmu_buf_rele(db, FTAG); | |
2171 | return (err); | |
2172 | } | |
2173 | ||
ba67d821 | 2174 | dmu_tx_t *tx = dmu_tx_create(rwa->os); |
03916905 PD |
2175 | |
2176 | dmu_tx_hold_spill(tx, db->db_object); | |
2177 | ||
2178 | err = dmu_tx_assign(tx, TXG_WAIT); | |
2179 | if (err != 0) { | |
2180 | dmu_buf_rele(db, FTAG); | |
2181 | dmu_buf_rele(db_spill, FTAG); | |
2182 | dmu_tx_abort(tx); | |
2183 | return (err); | |
2184 | } | |
2185 | ||
caf9dd20 BB |
2186 | /* |
2187 | * Spill blocks may both grow and shrink. When a change in size | |
2188 | * occurs any existing dbuf must be updated to match the logical | |
2189 | * size of the provided arc_buf_t. | |
2190 | */ | |
2191 | if (db_spill->db_size != drrs->drr_length) { | |
2192 | dmu_buf_will_fill(db_spill, tx); | |
ba67d821 | 2193 | VERIFY0(dbuf_spill_set_blksz(db_spill, |
03916905 | 2194 | drrs->drr_length, tx)); |
caf9dd20 | 2195 | } |
03916905 | 2196 | |
ba67d821 MA |
2197 | arc_buf_t *abuf; |
2198 | if (rwa->raw) { | |
2199 | boolean_t byteorder = ZFS_HOST_BYTEORDER ^ | |
2200 | !!DRR_IS_RAW_BYTESWAPPED(drrs->drr_flags) ^ | |
2201 | rwa->byteswap; | |
2202 | ||
2203 | abuf = arc_loan_raw_buf(dmu_objset_spa(rwa->os), | |
2204 | drrs->drr_object, byteorder, drrs->drr_salt, | |
2205 | drrs->drr_iv, drrs->drr_mac, drrs->drr_type, | |
2206 | drrs->drr_compressed_size, drrs->drr_length, | |
2207 | drrs->drr_compressiontype, 0); | |
2208 | } else { | |
2209 | abuf = arc_loan_buf(dmu_objset_spa(rwa->os), | |
2210 | DMU_OT_IS_METADATA(drrs->drr_type), | |
2211 | drrs->drr_length); | |
2212 | if (rwa->byteswap) { | |
2213 | dmu_object_byteswap_t byteswap = | |
2214 | DMU_OT_BYTESWAP(drrs->drr_type); | |
2215 | dmu_ot_byteswap[byteswap].ob_func(abd_to_buf(abd), | |
2216 | DRR_SPILL_PAYLOAD_SIZE(drrs)); | |
2217 | } | |
03916905 PD |
2218 | } |
2219 | ||
861166b0 | 2220 | memcpy(abuf->b_data, abd_to_buf(abd), DRR_SPILL_PAYLOAD_SIZE(drrs)); |
ba67d821 | 2221 | abd_free(abd); |
03916905 PD |
2222 | dbuf_assign_arcbuf((dmu_buf_impl_t *)db_spill, abuf, tx); |
2223 | ||
2224 | dmu_buf_rele(db, FTAG); | |
2225 | dmu_buf_rele(db_spill, FTAG); | |
2226 | ||
2227 | dmu_tx_commit(tx); | |
2228 | return (0); | |
2229 | } | |
2230 | ||
03916905 PD |
2231 | noinline static int |
2232 | receive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) | |
2233 | { | |
2234 | int err; | |
2235 | ||
30af21b0 | 2236 | if (drrf->drr_length != -1ULL && |
03916905 PD |
2237 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) |
2238 | return (SET_ERROR(EINVAL)); | |
2239 | ||
2240 | if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) | |
2241 | return (SET_ERROR(EINVAL)); | |
2242 | ||
2243 | if (drrf->drr_object > rwa->max_object) | |
2244 | rwa->max_object = drrf->drr_object; | |
2245 | ||
2246 | err = dmu_free_long_range(rwa->os, drrf->drr_object, | |
2247 | drrf->drr_offset, drrf->drr_length); | |
2248 | ||
2249 | return (err); | |
2250 | } | |
2251 | ||
2252 | static int | |
2253 | receive_object_range(struct receive_writer_arg *rwa, | |
2254 | struct drr_object_range *drror) | |
2255 | { | |
2256 | /* | |
2257 | * By default, we assume this block is in our native format | |
2258 | * (ZFS_HOST_BYTEORDER). We then take into account whether | |
2259 | * the send stream is byteswapped (rwa->byteswap). Finally, | |
2260 | * we need to byteswap again if this particular block was | |
2261 | * in non-native format on the send side. | |
2262 | */ | |
2263 | boolean_t byteorder = ZFS_HOST_BYTEORDER ^ rwa->byteswap ^ | |
2264 | !!DRR_IS_RAW_BYTESWAPPED(drror->drr_flags); | |
2265 | ||
2266 | /* | |
2267 | * Since dnode block sizes are constant, we should not need to worry | |
2268 | * about making sure that the dnode block size is the same on the | |
2269 | * sending and receiving sides for the time being. For non-raw sends, | |
2270 | * this does not matter (and in fact we do not send a DRR_OBJECT_RANGE | |
2271 | * record at all). Raw sends require this record type because the | |
2272 | * encryption parameters are used to protect an entire block of bonus | |
2273 | * buffers. If the size of dnode blocks ever becomes variable, | |
2274 | * handling will need to be added to ensure that dnode block sizes | |
2275 | * match on the sending and receiving side. | |
2276 | */ | |
2277 | if (drror->drr_numslots != DNODES_PER_BLOCK || | |
2278 | P2PHASE(drror->drr_firstobj, DNODES_PER_BLOCK) != 0 || | |
2279 | !rwa->raw) | |
2280 | return (SET_ERROR(EINVAL)); | |
2281 | ||
2282 | if (drror->drr_firstobj > rwa->max_object) | |
2283 | rwa->max_object = drror->drr_firstobj; | |
2284 | ||
2285 | /* | |
2286 | * The DRR_OBJECT_RANGE handling must be deferred to receive_object() | |
2287 | * so that the block of dnodes is not written out when it's empty, | |
2288 | * and converted to a HOLE BP. | |
2289 | */ | |
2290 | rwa->or_crypt_params_present = B_TRUE; | |
2291 | rwa->or_firstobj = drror->drr_firstobj; | |
2292 | rwa->or_numslots = drror->drr_numslots; | |
861166b0 AZ |
2293 | memcpy(rwa->or_salt, drror->drr_salt, ZIO_DATA_SALT_LEN); |
2294 | memcpy(rwa->or_iv, drror->drr_iv, ZIO_DATA_IV_LEN); | |
2295 | memcpy(rwa->or_mac, drror->drr_mac, ZIO_DATA_MAC_LEN); | |
03916905 PD |
2296 | rwa->or_byteorder = byteorder; |
2297 | ||
2298 | return (0); | |
2299 | } | |
2300 | ||
30af21b0 PD |
2301 | /* |
2302 | * Until we have the ability to redact large ranges of data efficiently, we | |
2303 | * process these records as frees. | |
2304 | */ | |
30af21b0 PD |
2305 | noinline static int |
2306 | receive_redact(struct receive_writer_arg *rwa, struct drr_redact *drrr) | |
2307 | { | |
2308 | struct drr_free drrf = {0}; | |
2309 | drrf.drr_length = drrr->drr_length; | |
2310 | drrf.drr_object = drrr->drr_object; | |
2311 | drrf.drr_offset = drrr->drr_offset; | |
2312 | drrf.drr_toguid = drrr->drr_toguid; | |
2313 | return (receive_free(rwa, &drrf)); | |
2314 | } | |
2315 | ||
03916905 PD |
2316 | /* used to destroy the drc_ds on error */ |
2317 | static void | |
2318 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
2319 | { | |
2320 | dsl_dataset_t *ds = drc->drc_ds; | |
40ab927a | 2321 | ds_hold_flags_t dsflags; |
03916905 | 2322 | |
40ab927a | 2323 | dsflags = (drc->drc_raw) ? DS_HOLD_FLAG_NONE : DS_HOLD_FLAG_DECRYPT; |
03916905 PD |
2324 | /* |
2325 | * Wait for the txg sync before cleaning up the receive. For | |
2326 | * resumable receives, this ensures that our resume state has | |
2327 | * been written out to disk. For raw receives, this ensures | |
2328 | * that the user accounting code will not attempt to do anything | |
2329 | * after we stopped receiving the dataset. | |
2330 | */ | |
2331 | txg_wait_synced(ds->ds_dir->dd_pool, 0); | |
2332 | ds->ds_objset->os_raw_receive = B_FALSE; | |
2333 | ||
2334 | rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG); | |
61152d10 TC |
2335 | if (drc->drc_resumable && drc->drc_should_save && |
2336 | !BP_IS_HOLE(dsl_dataset_get_blkptr(ds))) { | |
03916905 PD |
2337 | rrw_exit(&ds->ds_bp_rwlock, FTAG); |
2338 | dsl_dataset_disown(ds, dsflags, dmu_recv_tag); | |
2339 | } else { | |
2340 | char name[ZFS_MAX_DATASET_NAME_LEN]; | |
2341 | rrw_exit(&ds->ds_bp_rwlock, FTAG); | |
2342 | dsl_dataset_name(ds, name); | |
2343 | dsl_dataset_disown(ds, dsflags, dmu_recv_tag); | |
2344 | (void) dsl_destroy_head(name); | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | static void | |
30af21b0 | 2349 | receive_cksum(dmu_recv_cookie_t *drc, int len, void *buf) |
03916905 | 2350 | { |
30af21b0 PD |
2351 | if (drc->drc_byteswap) { |
2352 | (void) fletcher_4_incremental_byteswap(buf, len, | |
2353 | &drc->drc_cksum); | |
03916905 | 2354 | } else { |
30af21b0 | 2355 | (void) fletcher_4_incremental_native(buf, len, &drc->drc_cksum); |
03916905 PD |
2356 | } |
2357 | } | |
2358 | ||
2359 | /* | |
2360 | * Read the payload into a buffer of size len, and update the current record's | |
2361 | * payload field. | |
30af21b0 PD |
2362 | * Allocate drc->drc_next_rrd and read the next record's header into |
2363 | * drc->drc_next_rrd->header. | |
03916905 PD |
2364 | * Verify checksum of payload and next record. |
2365 | */ | |
2366 | static int | |
30af21b0 | 2367 | receive_read_payload_and_next_header(dmu_recv_cookie_t *drc, int len, void *buf) |
03916905 PD |
2368 | { |
2369 | int err; | |
03916905 PD |
2370 | |
2371 | if (len != 0) { | |
2372 | ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); | |
30af21b0 | 2373 | err = receive_read(drc, len, buf); |
03916905 PD |
2374 | if (err != 0) |
2375 | return (err); | |
30af21b0 | 2376 | receive_cksum(drc, len, buf); |
03916905 PD |
2377 | |
2378 | /* note: rrd is NULL when reading the begin record's payload */ | |
30af21b0 PD |
2379 | if (drc->drc_rrd != NULL) { |
2380 | drc->drc_rrd->payload = buf; | |
2381 | drc->drc_rrd->payload_size = len; | |
2382 | drc->drc_rrd->bytes_read = drc->drc_bytes_read; | |
03916905 | 2383 | } |
960347d3 TC |
2384 | } else { |
2385 | ASSERT3P(buf, ==, NULL); | |
03916905 PD |
2386 | } |
2387 | ||
30af21b0 | 2388 | drc->drc_prev_cksum = drc->drc_cksum; |
03916905 | 2389 | |
30af21b0 PD |
2390 | drc->drc_next_rrd = kmem_zalloc(sizeof (*drc->drc_next_rrd), KM_SLEEP); |
2391 | err = receive_read(drc, sizeof (drc->drc_next_rrd->header), | |
2392 | &drc->drc_next_rrd->header); | |
2393 | drc->drc_next_rrd->bytes_read = drc->drc_bytes_read; | |
03916905 PD |
2394 | |
2395 | if (err != 0) { | |
30af21b0 PD |
2396 | kmem_free(drc->drc_next_rrd, sizeof (*drc->drc_next_rrd)); |
2397 | drc->drc_next_rrd = NULL; | |
03916905 PD |
2398 | return (err); |
2399 | } | |
30af21b0 PD |
2400 | if (drc->drc_next_rrd->header.drr_type == DRR_BEGIN) { |
2401 | kmem_free(drc->drc_next_rrd, sizeof (*drc->drc_next_rrd)); | |
2402 | drc->drc_next_rrd = NULL; | |
03916905 PD |
2403 | return (SET_ERROR(EINVAL)); |
2404 | } | |
2405 | ||
2406 | /* | |
2407 | * Note: checksum is of everything up to but not including the | |
2408 | * checksum itself. | |
2409 | */ | |
2410 | ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), | |
2411 | ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); | |
30af21b0 | 2412 | receive_cksum(drc, |
03916905 | 2413 | offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), |
30af21b0 | 2414 | &drc->drc_next_rrd->header); |
03916905 | 2415 | |
30af21b0 PD |
2416 | zio_cksum_t cksum_orig = |
2417 | drc->drc_next_rrd->header.drr_u.drr_checksum.drr_checksum; | |
2418 | zio_cksum_t *cksump = | |
2419 | &drc->drc_next_rrd->header.drr_u.drr_checksum.drr_checksum; | |
03916905 | 2420 | |
30af21b0 PD |
2421 | if (drc->drc_byteswap) |
2422 | byteswap_record(&drc->drc_next_rrd->header); | |
03916905 PD |
2423 | |
2424 | if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && | |
30af21b0 PD |
2425 | !ZIO_CHECKSUM_EQUAL(drc->drc_cksum, *cksump)) { |
2426 | kmem_free(drc->drc_next_rrd, sizeof (*drc->drc_next_rrd)); | |
2427 | drc->drc_next_rrd = NULL; | |
03916905 PD |
2428 | return (SET_ERROR(ECKSUM)); |
2429 | } | |
2430 | ||
30af21b0 | 2431 | receive_cksum(drc, sizeof (cksum_orig), &cksum_orig); |
03916905 PD |
2432 | |
2433 | return (0); | |
2434 | } | |
2435 | ||
03916905 PD |
2436 | /* |
2437 | * Issue the prefetch reads for any necessary indirect blocks. | |
2438 | * | |
2439 | * We use the object ignore list to tell us whether or not to issue prefetches | |
2440 | * for a given object. We do this for both correctness (in case the blocksize | |
2441 | * of an object has changed) and performance (if the object doesn't exist, don't | |
2442 | * needlessly try to issue prefetches). We also trim the list as we go through | |
2443 | * the stream to prevent it from growing to an unbounded size. | |
2444 | * | |
2445 | * The object numbers within will always be in sorted order, and any write | |
2446 | * records we see will also be in sorted order, but they're not sorted with | |
2447 | * respect to each other (i.e. we can get several object records before | |
2448 | * receiving each object's write records). As a result, once we've reached a | |
2449 | * given object number, we can safely remove any reference to lower object | |
2450 | * numbers in the ignore list. In practice, we receive up to 32 object records | |
2451 | * before receiving write records, so the list can have up to 32 nodes in it. | |
2452 | */ | |
03916905 | 2453 | static void |
30af21b0 PD |
2454 | receive_read_prefetch(dmu_recv_cookie_t *drc, uint64_t object, uint64_t offset, |
2455 | uint64_t length) | |
03916905 | 2456 | { |
30af21b0 PD |
2457 | if (!objlist_exists(drc->drc_ignore_objlist, object)) { |
2458 | dmu_prefetch(drc->drc_os, object, 1, offset, length, | |
03916905 PD |
2459 | ZIO_PRIORITY_SYNC_READ); |
2460 | } | |
2461 | } | |
2462 | ||
2463 | /* | |
2464 | * Read records off the stream, issuing any necessary prefetches. | |
2465 | */ | |
2466 | static int | |
30af21b0 | 2467 | receive_read_record(dmu_recv_cookie_t *drc) |
03916905 PD |
2468 | { |
2469 | int err; | |
2470 | ||
30af21b0 | 2471 | switch (drc->drc_rrd->header.drr_type) { |
03916905 PD |
2472 | case DRR_OBJECT: |
2473 | { | |
30af21b0 PD |
2474 | struct drr_object *drro = |
2475 | &drc->drc_rrd->header.drr_u.drr_object; | |
03916905 | 2476 | uint32_t size = DRR_OBJECT_PAYLOAD_SIZE(drro); |
960347d3 | 2477 | void *buf = NULL; |
03916905 PD |
2478 | dmu_object_info_t doi; |
2479 | ||
960347d3 TC |
2480 | if (size != 0) |
2481 | buf = kmem_zalloc(size, KM_SLEEP); | |
2482 | ||
30af21b0 | 2483 | err = receive_read_payload_and_next_header(drc, size, buf); |
03916905 PD |
2484 | if (err != 0) { |
2485 | kmem_free(buf, size); | |
2486 | return (err); | |
2487 | } | |
30af21b0 | 2488 | err = dmu_object_info(drc->drc_os, drro->drr_object, &doi); |
03916905 PD |
2489 | /* |
2490 | * See receive_read_prefetch for an explanation why we're | |
2491 | * storing this object in the ignore_obj_list. | |
2492 | */ | |
2493 | if (err == ENOENT || err == EEXIST || | |
2494 | (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { | |
30af21b0 PD |
2495 | objlist_insert(drc->drc_ignore_objlist, |
2496 | drro->drr_object); | |
03916905 PD |
2497 | err = 0; |
2498 | } | |
2499 | return (err); | |
2500 | } | |
2501 | case DRR_FREEOBJECTS: | |
2502 | { | |
30af21b0 | 2503 | err = receive_read_payload_and_next_header(drc, 0, NULL); |
03916905 PD |
2504 | return (err); |
2505 | } | |
2506 | case DRR_WRITE: | |
2507 | { | |
30af21b0 | 2508 | struct drr_write *drrw = &drc->drc_rrd->header.drr_u.drr_write; |
ba67d821 MA |
2509 | int size = DRR_WRITE_PAYLOAD_SIZE(drrw); |
2510 | abd_t *abd = abd_alloc_linear(size, B_FALSE); | |
2511 | err = receive_read_payload_and_next_header(drc, size, | |
2512 | abd_to_buf(abd)); | |
03916905 | 2513 | if (err != 0) { |
ba67d821 | 2514 | abd_free(abd); |
03916905 PD |
2515 | return (err); |
2516 | } | |
ba67d821 | 2517 | drc->drc_rrd->abd = abd; |
30af21b0 | 2518 | receive_read_prefetch(drc, drrw->drr_object, drrw->drr_offset, |
03916905 PD |
2519 | drrw->drr_logical_size); |
2520 | return (err); | |
2521 | } | |
03916905 PD |
2522 | case DRR_WRITE_EMBEDDED: |
2523 | { | |
2524 | struct drr_write_embedded *drrwe = | |
30af21b0 | 2525 | &drc->drc_rrd->header.drr_u.drr_write_embedded; |
03916905 PD |
2526 | uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); |
2527 | void *buf = kmem_zalloc(size, KM_SLEEP); | |
2528 | ||
30af21b0 | 2529 | err = receive_read_payload_and_next_header(drc, size, buf); |
03916905 PD |
2530 | if (err != 0) { |
2531 | kmem_free(buf, size); | |
2532 | return (err); | |
2533 | } | |
2534 | ||
30af21b0 | 2535 | receive_read_prefetch(drc, drrwe->drr_object, drrwe->drr_offset, |
03916905 PD |
2536 | drrwe->drr_length); |
2537 | return (err); | |
2538 | } | |
2539 | case DRR_FREE: | |
30af21b0 | 2540 | case DRR_REDACT: |
03916905 PD |
2541 | { |
2542 | /* | |
2543 | * It might be beneficial to prefetch indirect blocks here, but | |
2544 | * we don't really have the data to decide for sure. | |
2545 | */ | |
30af21b0 | 2546 | err = receive_read_payload_and_next_header(drc, 0, NULL); |
03916905 PD |
2547 | return (err); |
2548 | } | |
2549 | case DRR_END: | |
2550 | { | |
30af21b0 PD |
2551 | struct drr_end *drre = &drc->drc_rrd->header.drr_u.drr_end; |
2552 | if (!ZIO_CHECKSUM_EQUAL(drc->drc_prev_cksum, | |
2553 | drre->drr_checksum)) | |
03916905 PD |
2554 | return (SET_ERROR(ECKSUM)); |
2555 | return (0); | |
2556 | } | |
2557 | case DRR_SPILL: | |
2558 | { | |
30af21b0 | 2559 | struct drr_spill *drrs = &drc->drc_rrd->header.drr_u.drr_spill; |
ba67d821 MA |
2560 | int size = DRR_SPILL_PAYLOAD_SIZE(drrs); |
2561 | abd_t *abd = abd_alloc_linear(size, B_FALSE); | |
2562 | err = receive_read_payload_and_next_header(drc, size, | |
2563 | abd_to_buf(abd)); | |
30af21b0 | 2564 | if (err != 0) |
ba67d821 | 2565 | abd_free(abd); |
30af21b0 | 2566 | else |
ba67d821 | 2567 | drc->drc_rrd->abd = abd; |
03916905 PD |
2568 | return (err); |
2569 | } | |
2570 | case DRR_OBJECT_RANGE: | |
2571 | { | |
30af21b0 | 2572 | err = receive_read_payload_and_next_header(drc, 0, NULL); |
03916905 | 2573 | return (err); |
30af21b0 | 2574 | |
03916905 PD |
2575 | } |
2576 | default: | |
2577 | return (SET_ERROR(EINVAL)); | |
2578 | } | |
2579 | } | |
2580 | ||
30af21b0 PD |
2581 | |
2582 | ||
03916905 PD |
2583 | static void |
2584 | dprintf_drr(struct receive_record_arg *rrd, int err) | |
2585 | { | |
2586 | #ifdef ZFS_DEBUG | |
2587 | switch (rrd->header.drr_type) { | |
2588 | case DRR_OBJECT: | |
2589 | { | |
2590 | struct drr_object *drro = &rrd->header.drr_u.drr_object; | |
2591 | dprintf("drr_type = OBJECT obj = %llu type = %u " | |
2592 | "bonustype = %u blksz = %u bonuslen = %u cksumtype = %u " | |
2593 | "compress = %u dn_slots = %u err = %d\n", | |
8e739b2c RE |
2594 | (u_longlong_t)drro->drr_object, drro->drr_type, |
2595 | drro->drr_bonustype, drro->drr_blksz, drro->drr_bonuslen, | |
03916905 PD |
2596 | drro->drr_checksumtype, drro->drr_compress, |
2597 | drro->drr_dn_slots, err); | |
2598 | break; | |
2599 | } | |
2600 | case DRR_FREEOBJECTS: | |
2601 | { | |
2602 | struct drr_freeobjects *drrfo = | |
2603 | &rrd->header.drr_u.drr_freeobjects; | |
2604 | dprintf("drr_type = FREEOBJECTS firstobj = %llu " | |
2605 | "numobjs = %llu err = %d\n", | |
8e739b2c RE |
2606 | (u_longlong_t)drrfo->drr_firstobj, |
2607 | (u_longlong_t)drrfo->drr_numobjs, err); | |
03916905 PD |
2608 | break; |
2609 | } | |
2610 | case DRR_WRITE: | |
2611 | { | |
2612 | struct drr_write *drrw = &rrd->header.drr_u.drr_write; | |
2613 | dprintf("drr_type = WRITE obj = %llu type = %u offset = %llu " | |
5dbf8b4e | 2614 | "lsize = %llu cksumtype = %u flags = %u " |
03916905 | 2615 | "compress = %u psize = %llu err = %d\n", |
8e739b2c RE |
2616 | (u_longlong_t)drrw->drr_object, drrw->drr_type, |
2617 | (u_longlong_t)drrw->drr_offset, | |
2618 | (u_longlong_t)drrw->drr_logical_size, | |
2619 | drrw->drr_checksumtype, drrw->drr_flags, | |
2620 | drrw->drr_compressiontype, | |
2621 | (u_longlong_t)drrw->drr_compressed_size, err); | |
03916905 PD |
2622 | break; |
2623 | } | |
2624 | case DRR_WRITE_BYREF: | |
2625 | { | |
2626 | struct drr_write_byref *drrwbr = | |
2627 | &rrd->header.drr_u.drr_write_byref; | |
2628 | dprintf("drr_type = WRITE_BYREF obj = %llu offset = %llu " | |
2629 | "length = %llu toguid = %llx refguid = %llx " | |
2630 | "refobject = %llu refoffset = %llu cksumtype = %u " | |
5dbf8b4e | 2631 | "flags = %u err = %d\n", |
8e739b2c RE |
2632 | (u_longlong_t)drrwbr->drr_object, |
2633 | (u_longlong_t)drrwbr->drr_offset, | |
2634 | (u_longlong_t)drrwbr->drr_length, | |
2635 | (u_longlong_t)drrwbr->drr_toguid, | |
2636 | (u_longlong_t)drrwbr->drr_refguid, | |
2637 | (u_longlong_t)drrwbr->drr_refobject, | |
2638 | (u_longlong_t)drrwbr->drr_refoffset, | |
2639 | drrwbr->drr_checksumtype, drrwbr->drr_flags, err); | |
03916905 PD |
2640 | break; |
2641 | } | |
2642 | case DRR_WRITE_EMBEDDED: | |
2643 | { | |
2644 | struct drr_write_embedded *drrwe = | |
2645 | &rrd->header.drr_u.drr_write_embedded; | |
2646 | dprintf("drr_type = WRITE_EMBEDDED obj = %llu offset = %llu " | |
2647 | "length = %llu compress = %u etype = %u lsize = %u " | |
2648 | "psize = %u err = %d\n", | |
8e739b2c RE |
2649 | (u_longlong_t)drrwe->drr_object, |
2650 | (u_longlong_t)drrwe->drr_offset, | |
2651 | (u_longlong_t)drrwe->drr_length, | |
03916905 PD |
2652 | drrwe->drr_compression, drrwe->drr_etype, |
2653 | drrwe->drr_lsize, drrwe->drr_psize, err); | |
2654 | break; | |
2655 | } | |
2656 | case DRR_FREE: | |
2657 | { | |
2658 | struct drr_free *drrf = &rrd->header.drr_u.drr_free; | |
2659 | dprintf("drr_type = FREE obj = %llu offset = %llu " | |
2660 | "length = %lld err = %d\n", | |
8e739b2c RE |
2661 | (u_longlong_t)drrf->drr_object, |
2662 | (u_longlong_t)drrf->drr_offset, | |
2663 | (longlong_t)drrf->drr_length, | |
03916905 PD |
2664 | err); |
2665 | break; | |
2666 | } | |
2667 | case DRR_SPILL: | |
2668 | { | |
2669 | struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; | |
2670 | dprintf("drr_type = SPILL obj = %llu length = %llu " | |
8e739b2c RE |
2671 | "err = %d\n", (u_longlong_t)drrs->drr_object, |
2672 | (u_longlong_t)drrs->drr_length, err); | |
03916905 PD |
2673 | break; |
2674 | } | |
5dbf8b4e TC |
2675 | case DRR_OBJECT_RANGE: |
2676 | { | |
2677 | struct drr_object_range *drror = | |
2678 | &rrd->header.drr_u.drr_object_range; | |
2679 | dprintf("drr_type = OBJECT_RANGE firstobj = %llu " | |
2680 | "numslots = %llu flags = %u err = %d\n", | |
8e739b2c RE |
2681 | (u_longlong_t)drror->drr_firstobj, |
2682 | (u_longlong_t)drror->drr_numslots, | |
5dbf8b4e TC |
2683 | drror->drr_flags, err); |
2684 | break; | |
2685 | } | |
03916905 PD |
2686 | default: |
2687 | return; | |
2688 | } | |
2689 | #endif | |
2690 | } | |
2691 | ||
2692 | /* | |
2693 | * Commit the records to the pool. | |
2694 | */ | |
2695 | static int | |
2696 | receive_process_record(struct receive_writer_arg *rwa, | |
2697 | struct receive_record_arg *rrd) | |
2698 | { | |
2699 | int err; | |
2700 | ||
2701 | /* Processing in order, therefore bytes_read should be increasing. */ | |
2702 | ASSERT3U(rrd->bytes_read, >=, rwa->bytes_read); | |
2703 | rwa->bytes_read = rrd->bytes_read; | |
2704 | ||
7261fc2e MA |
2705 | if (rrd->header.drr_type != DRR_WRITE) { |
2706 | err = flush_write_batch(rwa); | |
2707 | if (err != 0) { | |
ba67d821 MA |
2708 | if (rrd->abd != NULL) { |
2709 | abd_free(rrd->abd); | |
2710 | rrd->abd = NULL; | |
7261fc2e MA |
2711 | rrd->payload = NULL; |
2712 | } else if (rrd->payload != NULL) { | |
2713 | kmem_free(rrd->payload, rrd->payload_size); | |
2714 | rrd->payload = NULL; | |
2715 | } | |
2716 | ||
2717 | return (err); | |
2718 | } | |
2719 | } | |
2720 | ||
03916905 PD |
2721 | switch (rrd->header.drr_type) { |
2722 | case DRR_OBJECT: | |
2723 | { | |
2724 | struct drr_object *drro = &rrd->header.drr_u.drr_object; | |
2725 | err = receive_object(rwa, drro, rrd->payload); | |
2726 | kmem_free(rrd->payload, rrd->payload_size); | |
2727 | rrd->payload = NULL; | |
2728 | break; | |
2729 | } | |
2730 | case DRR_FREEOBJECTS: | |
2731 | { | |
2732 | struct drr_freeobjects *drrfo = | |
2733 | &rrd->header.drr_u.drr_freeobjects; | |
2734 | err = receive_freeobjects(rwa, drrfo); | |
2735 | break; | |
2736 | } | |
2737 | case DRR_WRITE: | |
2738 | { | |
7261fc2e MA |
2739 | err = receive_process_write_record(rwa, rrd); |
2740 | if (err != EAGAIN) { | |
2741 | /* | |
2742 | * On success, receive_process_write_record() returns | |
2743 | * EAGAIN to indicate that we do not want to free | |
2744 | * the rrd or arc_buf. | |
2745 | */ | |
2746 | ASSERT(err != 0); | |
ba67d821 MA |
2747 | abd_free(rrd->abd); |
2748 | rrd->abd = NULL; | |
7261fc2e | 2749 | } |
03916905 PD |
2750 | break; |
2751 | } | |
03916905 PD |
2752 | case DRR_WRITE_EMBEDDED: |
2753 | { | |
2754 | struct drr_write_embedded *drrwe = | |
2755 | &rrd->header.drr_u.drr_write_embedded; | |
2756 | err = receive_write_embedded(rwa, drrwe, rrd->payload); | |
2757 | kmem_free(rrd->payload, rrd->payload_size); | |
2758 | rrd->payload = NULL; | |
2759 | break; | |
2760 | } | |
2761 | case DRR_FREE: | |
2762 | { | |
2763 | struct drr_free *drrf = &rrd->header.drr_u.drr_free; | |
2764 | err = receive_free(rwa, drrf); | |
2765 | break; | |
2766 | } | |
2767 | case DRR_SPILL: | |
2768 | { | |
2769 | struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; | |
ba67d821 | 2770 | err = receive_spill(rwa, drrs, rrd->abd); |
03916905 | 2771 | if (err != 0) |
ba67d821 MA |
2772 | abd_free(rrd->abd); |
2773 | rrd->abd = NULL; | |
03916905 PD |
2774 | rrd->payload = NULL; |
2775 | break; | |
2776 | } | |
2777 | case DRR_OBJECT_RANGE: | |
2778 | { | |
2779 | struct drr_object_range *drror = | |
2780 | &rrd->header.drr_u.drr_object_range; | |
5dbf8b4e TC |
2781 | err = receive_object_range(rwa, drror); |
2782 | break; | |
03916905 | 2783 | } |
30af21b0 PD |
2784 | case DRR_REDACT: |
2785 | { | |
2786 | struct drr_redact *drrr = &rrd->header.drr_u.drr_redact; | |
2787 | err = receive_redact(rwa, drrr); | |
2788 | break; | |
2789 | } | |
03916905 | 2790 | default: |
5dbf8b4e | 2791 | err = (SET_ERROR(EINVAL)); |
03916905 PD |
2792 | } |
2793 | ||
2794 | if (err != 0) | |
2795 | dprintf_drr(rrd, err); | |
2796 | ||
2797 | return (err); | |
2798 | } | |
2799 | ||
2800 | /* | |
2801 | * dmu_recv_stream's worker thread; pull records off the queue, and then call | |
2802 | * receive_process_record When we're done, signal the main thread and exit. | |
2803 | */ | |
db7f1a91 | 2804 | static _Noreturn void |
03916905 PD |
2805 | receive_writer_thread(void *arg) |
2806 | { | |
2807 | struct receive_writer_arg *rwa = arg; | |
2808 | struct receive_record_arg *rrd; | |
2809 | fstrans_cookie_t cookie = spl_fstrans_mark(); | |
2810 | ||
2811 | for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; | |
2812 | rrd = bqueue_dequeue(&rwa->q)) { | |
2813 | /* | |
2814 | * If there's an error, the main thread will stop putting things | |
2815 | * on the queue, but we need to clear everything in it before we | |
2816 | * can exit. | |
2817 | */ | |
7261fc2e | 2818 | int err = 0; |
03916905 | 2819 | if (rwa->err == 0) { |
7261fc2e | 2820 | err = receive_process_record(rwa, rrd); |
ba67d821 MA |
2821 | } else if (rrd->abd != NULL) { |
2822 | abd_free(rrd->abd); | |
2823 | rrd->abd = NULL; | |
03916905 PD |
2824 | rrd->payload = NULL; |
2825 | } else if (rrd->payload != NULL) { | |
2826 | kmem_free(rrd->payload, rrd->payload_size); | |
2827 | rrd->payload = NULL; | |
2828 | } | |
7261fc2e MA |
2829 | /* |
2830 | * EAGAIN indicates that this record has been saved (on | |
2831 | * raw->write_batch), and will be used again, so we don't | |
2832 | * free it. | |
2833 | */ | |
2834 | if (err != EAGAIN) { | |
1b9cd1a9 MA |
2835 | if (rwa->err == 0) |
2836 | rwa->err = err; | |
7261fc2e MA |
2837 | kmem_free(rrd, sizeof (*rrd)); |
2838 | } | |
03916905 PD |
2839 | } |
2840 | kmem_free(rrd, sizeof (*rrd)); | |
7261fc2e MA |
2841 | |
2842 | int err = flush_write_batch(rwa); | |
2843 | if (rwa->err == 0) | |
2844 | rwa->err = err; | |
2845 | ||
03916905 PD |
2846 | mutex_enter(&rwa->mutex); |
2847 | rwa->done = B_TRUE; | |
2848 | cv_signal(&rwa->cv); | |
2849 | mutex_exit(&rwa->mutex); | |
2850 | spl_fstrans_unmark(cookie); | |
2851 | thread_exit(); | |
2852 | } | |
2853 | ||
2854 | static int | |
30af21b0 | 2855 | resume_check(dmu_recv_cookie_t *drc, nvlist_t *begin_nvl) |
03916905 PD |
2856 | { |
2857 | uint64_t val; | |
30af21b0 PD |
2858 | objset_t *mos = dmu_objset_pool(drc->drc_os)->dp_meta_objset; |
2859 | uint64_t dsobj = dmu_objset_id(drc->drc_os); | |
03916905 PD |
2860 | uint64_t resume_obj, resume_off; |
2861 | ||
2862 | if (nvlist_lookup_uint64(begin_nvl, | |
2863 | "resume_object", &resume_obj) != 0 || | |
2864 | nvlist_lookup_uint64(begin_nvl, | |
2865 | "resume_offset", &resume_off) != 0) { | |
2866 | return (SET_ERROR(EINVAL)); | |
2867 | } | |
2868 | VERIFY0(zap_lookup(mos, dsobj, | |
2869 | DS_FIELD_RESUME_OBJECT, sizeof (val), 1, &val)); | |
2870 | if (resume_obj != val) | |
2871 | return (SET_ERROR(EINVAL)); | |
2872 | VERIFY0(zap_lookup(mos, dsobj, | |
2873 | DS_FIELD_RESUME_OFFSET, sizeof (val), 1, &val)); | |
2874 | if (resume_off != val) | |
2875 | return (SET_ERROR(EINVAL)); | |
2876 | ||
2877 | return (0); | |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * Read in the stream's records, one by one, and apply them to the pool. There | |
2882 | * are two threads involved; the thread that calls this function will spin up a | |
2883 | * worker thread, read the records off the stream one by one, and issue | |
2884 | * prefetches for any necessary indirect blocks. It will then push the records | |
2885 | * onto an internal blocking queue. The worker thread will pull the records off | |
2886 | * the queue, and actually write the data into the DMU. This way, the worker | |
2887 | * thread doesn't have to wait for reads to complete, since everything it needs | |
2888 | * (the indirect blocks) will be prefetched. | |
2889 | * | |
2890 | * NB: callers *must* call dmu_recv_end() if this succeeds. | |
2891 | */ | |
2892 | int | |
196bee4c | 2893 | dmu_recv_stream(dmu_recv_cookie_t *drc, offset_t *voffp) |
03916905 PD |
2894 | { |
2895 | int err = 0; | |
30af21b0 | 2896 | struct receive_writer_arg *rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP); |
03916905 | 2897 | |
fce29d6a PZ |
2898 | if (dsl_dataset_has_resume_receive_state(drc->drc_ds)) { |
2899 | uint64_t bytes = 0; | |
03916905 PD |
2900 | (void) zap_lookup(drc->drc_ds->ds_dir->dd_pool->dp_meta_objset, |
2901 | drc->drc_ds->ds_object, DS_FIELD_RESUME_BYTES, | |
30af21b0 PD |
2902 | sizeof (bytes), 1, &bytes); |
2903 | drc->drc_bytes_read += bytes; | |
03916905 PD |
2904 | } |
2905 | ||
30af21b0 | 2906 | drc->drc_ignore_objlist = objlist_create(); |
03916905 PD |
2907 | |
2908 | /* these were verified in dmu_recv_begin */ | |
2909 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, | |
2910 | DMU_SUBSTREAM); | |
2911 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); | |
2912 | ||
03916905 | 2913 | ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); |
30af21b0 PD |
2914 | ASSERT0(drc->drc_os->os_encrypted && |
2915 | (drc->drc_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)); | |
03916905 | 2916 | |
03916905 | 2917 | /* handle DSL encryption key payload */ |
30af21b0 | 2918 | if (drc->drc_featureflags & DMU_BACKUP_FEATURE_RAW) { |
03916905 PD |
2919 | nvlist_t *keynvl = NULL; |
2920 | ||
30af21b0 | 2921 | ASSERT(drc->drc_os->os_encrypted); |
03916905 PD |
2922 | ASSERT(drc->drc_raw); |
2923 | ||
30af21b0 PD |
2924 | err = nvlist_lookup_nvlist(drc->drc_begin_nvl, "crypt_keydata", |
2925 | &keynvl); | |
03916905 PD |
2926 | if (err != 0) |
2927 | goto out; | |
2928 | ||
2929 | /* | |
2930 | * If this is a new dataset we set the key immediately. | |
2931 | * Otherwise we don't want to change the key until we | |
2932 | * are sure the rest of the receive succeeded so we stash | |
2933 | * the keynvl away until then. | |
2934 | */ | |
30af21b0 | 2935 | err = dsl_crypto_recv_raw(spa_name(drc->drc_os->os_spa), |
f00ab3f2 TC |
2936 | drc->drc_ds->ds_object, drc->drc_fromsnapobj, |
2937 | drc->drc_drrb->drr_type, keynvl, drc->drc_newfs); | |
03916905 PD |
2938 | if (err != 0) |
2939 | goto out; | |
2940 | ||
f00ab3f2 TC |
2941 | /* see comment in dmu_recv_end_sync() */ |
2942 | drc->drc_ivset_guid = 0; | |
2943 | (void) nvlist_lookup_uint64(keynvl, "to_ivset_guid", | |
2944 | &drc->drc_ivset_guid); | |
2945 | ||
03916905 PD |
2946 | if (!drc->drc_newfs) |
2947 | drc->drc_keynvl = fnvlist_dup(keynvl); | |
2948 | } | |
2949 | ||
30af21b0 PD |
2950 | if (drc->drc_featureflags & DMU_BACKUP_FEATURE_RESUMING) { |
2951 | err = resume_check(drc, drc->drc_begin_nvl); | |
03916905 PD |
2952 | if (err != 0) |
2953 | goto out; | |
2954 | } | |
2955 | ||
61152d10 TC |
2956 | /* |
2957 | * If we failed before this point we will clean up any new resume | |
2958 | * state that was created. Now that we've gotten past the initial | |
2959 | * checks we are ok to retain that resume state. | |
2960 | */ | |
2961 | drc->drc_should_save = B_TRUE; | |
2962 | ||
30af21b0 | 2963 | (void) bqueue_init(&rwa->q, zfs_recv_queue_ff, |
03916905 PD |
2964 | MAX(zfs_recv_queue_length, 2 * zfs_max_recordsize), |
2965 | offsetof(struct receive_record_arg, node)); | |
2966 | cv_init(&rwa->cv, NULL, CV_DEFAULT, NULL); | |
2967 | mutex_init(&rwa->mutex, NULL, MUTEX_DEFAULT, NULL); | |
30af21b0 | 2968 | rwa->os = drc->drc_os; |
03916905 PD |
2969 | rwa->byteswap = drc->drc_byteswap; |
2970 | rwa->resumable = drc->drc_resumable; | |
2971 | rwa->raw = drc->drc_raw; | |
caf9dd20 | 2972 | rwa->spill = drc->drc_spill; |
7bcb7f08 | 2973 | rwa->full = (drc->drc_drr_begin->drr_u.drr_begin.drr_fromguid == 0); |
03916905 | 2974 | rwa->os->os_raw_receive = drc->drc_raw; |
7261fc2e MA |
2975 | list_create(&rwa->write_batch, sizeof (struct receive_record_arg), |
2976 | offsetof(struct receive_record_arg, node.bqn_node)); | |
03916905 PD |
2977 | |
2978 | (void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc, | |
2979 | TS_RUN, minclsyspri); | |
2980 | /* | |
2981 | * We're reading rwa->err without locks, which is safe since we are the | |
2982 | * only reader, and the worker thread is the only writer. It's ok if we | |
2983 | * miss a write for an iteration or two of the loop, since the writer | |
2984 | * thread will keep freeing records we send it until we send it an eos | |
2985 | * marker. | |
2986 | * | |
2987 | * We can leave this loop in 3 ways: First, if rwa->err is | |
2988 | * non-zero. In that case, the writer thread will free the rrd we just | |
2989 | * pushed. Second, if we're interrupted; in that case, either it's the | |
30af21b0 PD |
2990 | * first loop and drc->drc_rrd was never allocated, or it's later, and |
2991 | * drc->drc_rrd has been handed off to the writer thread who will free | |
2992 | * it. Finally, if receive_read_record fails or we're at the end of the | |
2993 | * stream, then we free drc->drc_rrd and exit. | |
03916905 PD |
2994 | */ |
2995 | while (rwa->err == 0) { | |
2996 | if (issig(JUSTLOOKING) && issig(FORREAL)) { | |
2997 | err = SET_ERROR(EINTR); | |
2998 | break; | |
2999 | } | |
3000 | ||
30af21b0 PD |
3001 | ASSERT3P(drc->drc_rrd, ==, NULL); |
3002 | drc->drc_rrd = drc->drc_next_rrd; | |
3003 | drc->drc_next_rrd = NULL; | |
3004 | /* Allocates and loads header into drc->drc_next_rrd */ | |
3005 | err = receive_read_record(drc); | |
03916905 | 3006 | |
30af21b0 PD |
3007 | if (drc->drc_rrd->header.drr_type == DRR_END || err != 0) { |
3008 | kmem_free(drc->drc_rrd, sizeof (*drc->drc_rrd)); | |
3009 | drc->drc_rrd = NULL; | |
03916905 PD |
3010 | break; |
3011 | } | |
3012 | ||
30af21b0 PD |
3013 | bqueue_enqueue(&rwa->q, drc->drc_rrd, |
3014 | sizeof (struct receive_record_arg) + | |
3015 | drc->drc_rrd->payload_size); | |
3016 | drc->drc_rrd = NULL; | |
03916905 | 3017 | } |
30af21b0 PD |
3018 | |
3019 | ASSERT3P(drc->drc_rrd, ==, NULL); | |
3020 | drc->drc_rrd = kmem_zalloc(sizeof (*drc->drc_rrd), KM_SLEEP); | |
3021 | drc->drc_rrd->eos_marker = B_TRUE; | |
3022 | bqueue_enqueue_flush(&rwa->q, drc->drc_rrd, 1); | |
03916905 PD |
3023 | |
3024 | mutex_enter(&rwa->mutex); | |
3025 | while (!rwa->done) { | |
30af21b0 PD |
3026 | /* |
3027 | * We need to use cv_wait_sig() so that any process that may | |
3028 | * be sleeping here can still fork. | |
3029 | */ | |
3030 | (void) cv_wait_sig(&rwa->cv, &rwa->mutex); | |
03916905 PD |
3031 | } |
3032 | mutex_exit(&rwa->mutex); | |
3033 | ||
3034 | /* | |
3035 | * If we are receiving a full stream as a clone, all object IDs which | |
3036 | * are greater than the maximum ID referenced in the stream are | |
3037 | * by definition unused and must be freed. | |
3038 | */ | |
3039 | if (drc->drc_clone && drc->drc_drrb->drr_fromguid == 0) { | |
3040 | uint64_t obj = rwa->max_object + 1; | |
3041 | int free_err = 0; | |
3042 | int next_err = 0; | |
3043 | ||
3044 | while (next_err == 0) { | |
3045 | free_err = dmu_free_long_object(rwa->os, obj); | |
3046 | if (free_err != 0 && free_err != ENOENT) | |
3047 | break; | |
3048 | ||
3049 | next_err = dmu_object_next(rwa->os, &obj, FALSE, 0); | |
3050 | } | |
3051 | ||
3052 | if (err == 0) { | |
3053 | if (free_err != 0 && free_err != ENOENT) | |
3054 | err = free_err; | |
3055 | else if (next_err != ESRCH) | |
3056 | err = next_err; | |
3057 | } | |
3058 | } | |
3059 | ||
3060 | cv_destroy(&rwa->cv); | |
3061 | mutex_destroy(&rwa->mutex); | |
3062 | bqueue_destroy(&rwa->q); | |
7261fc2e | 3063 | list_destroy(&rwa->write_batch); |
03916905 PD |
3064 | if (err == 0) |
3065 | err = rwa->err; | |
3066 | ||
3067 | out: | |
f00ab3f2 TC |
3068 | /* |
3069 | * If we hit an error before we started the receive_writer_thread | |
3070 | * we need to clean up the next_rrd we create by processing the | |
3071 | * DRR_BEGIN record. | |
3072 | */ | |
30af21b0 PD |
3073 | if (drc->drc_next_rrd != NULL) |
3074 | kmem_free(drc->drc_next_rrd, sizeof (*drc->drc_next_rrd)); | |
f00ab3f2 | 3075 | |
ec213971 MA |
3076 | /* |
3077 | * The objset will be invalidated by dmu_recv_end() when we do | |
3078 | * dsl_dataset_clone_swap_sync_impl(). | |
3079 | */ | |
3080 | drc->drc_os = NULL; | |
3081 | ||
30af21b0 PD |
3082 | kmem_free(rwa, sizeof (*rwa)); |
3083 | nvlist_free(drc->drc_begin_nvl); | |
03916905 PD |
3084 | |
3085 | if (err != 0) { | |
3086 | /* | |
3087 | * Clean up references. If receive is not resumable, | |
3088 | * destroy what we created, so we don't leave it in | |
3089 | * the inconsistent state. | |
3090 | */ | |
3091 | dmu_recv_cleanup_ds(drc); | |
3092 | nvlist_free(drc->drc_keynvl); | |
3093 | } | |
3094 | ||
30af21b0 PD |
3095 | objlist_destroy(drc->drc_ignore_objlist); |
3096 | drc->drc_ignore_objlist = NULL; | |
3097 | *voffp = drc->drc_voff; | |
03916905 PD |
3098 | return (err); |
3099 | } | |
3100 | ||
3101 | static int | |
3102 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) | |
3103 | { | |
3104 | dmu_recv_cookie_t *drc = arg; | |
3105 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3106 | int error; | |
3107 | ||
3108 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
3109 | ||
3110 | if (!drc->drc_newfs) { | |
3111 | dsl_dataset_t *origin_head; | |
3112 | ||
3113 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
3114 | if (error != 0) | |
3115 | return (error); | |
3116 | if (drc->drc_force) { | |
3117 | /* | |
3118 | * We will destroy any snapshots in tofs (i.e. before | |
3119 | * origin_head) that are after the origin (which is | |
3120 | * the snap before drc_ds, because drc_ds can not | |
3121 | * have any snaps of its own). | |
3122 | */ | |
3123 | uint64_t obj; | |
3124 | ||
3125 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
3126 | while (obj != | |
3127 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
3128 | dsl_dataset_t *snap; | |
3129 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
3130 | &snap); | |
3131 | if (error != 0) | |
3132 | break; | |
3133 | if (snap->ds_dir != origin_head->ds_dir) | |
3134 | error = SET_ERROR(EINVAL); | |
3135 | if (error == 0) { | |
3136 | error = dsl_destroy_snapshot_check_impl( | |
3137 | snap, B_FALSE); | |
3138 | } | |
3139 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; | |
3140 | dsl_dataset_rele(snap, FTAG); | |
3141 | if (error != 0) | |
3142 | break; | |
3143 | } | |
3144 | if (error != 0) { | |
3145 | dsl_dataset_rele(origin_head, FTAG); | |
3146 | return (error); | |
3147 | } | |
3148 | } | |
3149 | if (drc->drc_keynvl != NULL) { | |
3150 | error = dsl_crypto_recv_raw_key_check(drc->drc_ds, | |
3151 | drc->drc_keynvl, tx); | |
3152 | if (error != 0) { | |
3153 | dsl_dataset_rele(origin_head, FTAG); | |
3154 | return (error); | |
3155 | } | |
3156 | } | |
3157 | ||
3158 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, | |
3159 | origin_head, drc->drc_force, drc->drc_owner, tx); | |
3160 | if (error != 0) { | |
3161 | dsl_dataset_rele(origin_head, FTAG); | |
3162 | return (error); | |
3163 | } | |
3164 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
e59a377a MA |
3165 | drc->drc_tosnap, tx, B_TRUE, 1, |
3166 | drc->drc_cred, drc->drc_proc); | |
03916905 PD |
3167 | dsl_dataset_rele(origin_head, FTAG); |
3168 | if (error != 0) | |
3169 | return (error); | |
3170 | ||
3171 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); | |
3172 | } else { | |
3173 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
e59a377a MA |
3174 | drc->drc_tosnap, tx, B_TRUE, 1, |
3175 | drc->drc_cred, drc->drc_proc); | |
03916905 PD |
3176 | } |
3177 | return (error); | |
3178 | } | |
3179 | ||
3180 | static void | |
3181 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) | |
3182 | { | |
3183 | dmu_recv_cookie_t *drc = arg; | |
3184 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
3185 | boolean_t encrypted = drc->drc_ds->ds_dir->dd_crypto_obj != 0; | |
196bee4c | 3186 | uint64_t newsnapobj; |
03916905 PD |
3187 | |
3188 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
3189 | tx, "snap=%s", drc->drc_tosnap); | |
3190 | drc->drc_ds->ds_objset->os_raw_receive = B_FALSE; | |
3191 | ||
3192 | if (!drc->drc_newfs) { | |
3193 | dsl_dataset_t *origin_head; | |
3194 | ||
3195 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
3196 | &origin_head)); | |
3197 | ||
3198 | if (drc->drc_force) { | |
3199 | /* | |
3200 | * Destroy any snapshots of drc_tofs (origin_head) | |
3201 | * after the origin (the snap before drc_ds). | |
3202 | */ | |
3203 | uint64_t obj; | |
3204 | ||
3205 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
3206 | while (obj != | |
3207 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
3208 | dsl_dataset_t *snap; | |
3209 | VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, | |
3210 | &snap)); | |
3211 | ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); | |
3212 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; | |
3213 | dsl_destroy_snapshot_sync_impl(snap, | |
3214 | B_FALSE, tx); | |
3215 | dsl_dataset_rele(snap, FTAG); | |
3216 | } | |
3217 | } | |
3218 | if (drc->drc_keynvl != NULL) { | |
3219 | dsl_crypto_recv_raw_key_sync(drc->drc_ds, | |
3220 | drc->drc_keynvl, tx); | |
3221 | nvlist_free(drc->drc_keynvl); | |
3222 | drc->drc_keynvl = NULL; | |
3223 | } | |
3224 | ||
30af21b0 PD |
3225 | VERIFY3P(drc->drc_ds->ds_prev, ==, |
3226 | origin_head->ds_prev); | |
03916905 PD |
3227 | |
3228 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, | |
3229 | origin_head, tx); | |
0fdd6106 MA |
3230 | /* |
3231 | * The objset was evicted by dsl_dataset_clone_swap_sync_impl, | |
3232 | * so drc_os is no longer valid. | |
3233 | */ | |
3234 | drc->drc_os = NULL; | |
3235 | ||
03916905 PD |
3236 | dsl_dataset_snapshot_sync_impl(origin_head, |
3237 | drc->drc_tosnap, tx); | |
3238 | ||
3239 | /* set snapshot's creation time and guid */ | |
3240 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
3241 | dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = | |
3242 | drc->drc_drrb->drr_creation_time; | |
3243 | dsl_dataset_phys(origin_head->ds_prev)->ds_guid = | |
3244 | drc->drc_drrb->drr_toguid; | |
3245 | dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= | |
3246 | ~DS_FLAG_INCONSISTENT; | |
3247 | ||
3248 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
3249 | dsl_dataset_phys(origin_head)->ds_flags &= | |
3250 | ~DS_FLAG_INCONSISTENT; | |
3251 | ||
196bee4c | 3252 | newsnapobj = |
03916905 PD |
3253 | dsl_dataset_phys(origin_head)->ds_prev_snap_obj; |
3254 | ||
3255 | dsl_dataset_rele(origin_head, FTAG); | |
3256 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
3257 | ||
3258 | if (drc->drc_owner != NULL) | |
3259 | VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); | |
3260 | } else { | |
3261 | dsl_dataset_t *ds = drc->drc_ds; | |
3262 | ||
3263 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); | |
3264 | ||
3265 | /* set snapshot's creation time and guid */ | |
3266 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
3267 | dsl_dataset_phys(ds->ds_prev)->ds_creation_time = | |
3268 | drc->drc_drrb->drr_creation_time; | |
3269 | dsl_dataset_phys(ds->ds_prev)->ds_guid = | |
3270 | drc->drc_drrb->drr_toguid; | |
3271 | dsl_dataset_phys(ds->ds_prev)->ds_flags &= | |
3272 | ~DS_FLAG_INCONSISTENT; | |
3273 | ||
3274 | dmu_buf_will_dirty(ds->ds_dbuf, tx); | |
3275 | dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
3276 | if (dsl_dataset_has_resume_receive_state(ds)) { | |
3277 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3278 | DS_FIELD_RESUME_FROMGUID, tx); | |
3279 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3280 | DS_FIELD_RESUME_OBJECT, tx); | |
3281 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3282 | DS_FIELD_RESUME_OFFSET, tx); | |
3283 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3284 | DS_FIELD_RESUME_BYTES, tx); | |
3285 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3286 | DS_FIELD_RESUME_TOGUID, tx); | |
3287 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, | |
3288 | DS_FIELD_RESUME_TONAME, tx); | |
30af21b0 PD |
3289 | (void) zap_remove(dp->dp_meta_objset, ds->ds_object, |
3290 | DS_FIELD_RESUME_REDACT_BOOKMARK_SNAPS, tx); | |
03916905 | 3291 | } |
196bee4c | 3292 | newsnapobj = |
03916905 PD |
3293 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; |
3294 | } | |
f00ab3f2 TC |
3295 | |
3296 | /* | |
3297 | * If this is a raw receive, the crypt_keydata nvlist will include | |
3298 | * a to_ivset_guid for us to set on the new snapshot. This value | |
3299 | * will override the value generated by the snapshot code. However, | |
3300 | * this value may not be present, because older implementations of | |
3301 | * the raw send code did not include this value, and we are still | |
3302 | * allowed to receive them if the zfs_disable_ivset_guid_check | |
3303 | * tunable is set, in which case we will leave the newly-generated | |
3304 | * value. | |
3305 | */ | |
3306 | if (drc->drc_raw && drc->drc_ivset_guid != 0) { | |
196bee4c | 3307 | dmu_object_zapify(dp->dp_meta_objset, newsnapobj, |
f00ab3f2 | 3308 | DMU_OT_DSL_DATASET, tx); |
196bee4c | 3309 | VERIFY0(zap_update(dp->dp_meta_objset, newsnapobj, |
f00ab3f2 TC |
3310 | DS_FIELD_IVSET_GUID, sizeof (uint64_t), 1, |
3311 | &drc->drc_ivset_guid, tx)); | |
3312 | } | |
3313 | ||
03916905 PD |
3314 | /* |
3315 | * Release the hold from dmu_recv_begin. This must be done before | |
3316 | * we return to open context, so that when we free the dataset's dnode | |
3317 | * we can evict its bonus buffer. Since the dataset may be destroyed | |
3318 | * at this point (and therefore won't have a valid pointer to the spa) | |
3319 | * we release the key mapping manually here while we do have a valid | |
3320 | * pointer, if it exists. | |
3321 | */ | |
3322 | if (!drc->drc_raw && encrypted) { | |
3323 | (void) spa_keystore_remove_mapping(dmu_tx_pool(tx)->dp_spa, | |
3324 | drc->drc_ds->ds_object, drc->drc_ds); | |
3325 | } | |
3326 | dsl_dataset_disown(drc->drc_ds, 0, dmu_recv_tag); | |
3327 | drc->drc_ds = NULL; | |
3328 | } | |
3329 | ||
03916905 PD |
3330 | static int dmu_recv_end_modified_blocks = 3; |
3331 | ||
3332 | static int | |
3333 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
3334 | { | |
3335 | #ifdef _KERNEL | |
3336 | /* | |
3337 | * We will be destroying the ds; make sure its origin is unmounted if | |
3338 | * necessary. | |
3339 | */ | |
3340 | char name[ZFS_MAX_DATASET_NAME_LEN]; | |
3341 | dsl_dataset_name(drc->drc_ds, name); | |
3342 | zfs_destroy_unmount_origin(name); | |
3343 | #endif | |
3344 | ||
3345 | return (dsl_sync_task(drc->drc_tofs, | |
3346 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3347 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); | |
3348 | } | |
3349 | ||
3350 | static int | |
3351 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
3352 | { | |
3353 | return (dsl_sync_task(drc->drc_tofs, | |
3354 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3355 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL)); | |
3356 | } | |
3357 | ||
3358 | int | |
3359 | dmu_recv_end(dmu_recv_cookie_t *drc, void *owner) | |
3360 | { | |
3361 | int error; | |
3362 | ||
3363 | drc->drc_owner = owner; | |
3364 | ||
3365 | if (drc->drc_newfs) | |
3366 | error = dmu_recv_new_end(drc); | |
3367 | else | |
3368 | error = dmu_recv_existing_end(drc); | |
3369 | ||
3370 | if (error != 0) { | |
3371 | dmu_recv_cleanup_ds(drc); | |
3372 | nvlist_free(drc->drc_keynvl); | |
ec213971 MA |
3373 | } else { |
3374 | if (drc->drc_newfs) { | |
3375 | zvol_create_minor(drc->drc_tofs); | |
3376 | } | |
3377 | char *snapname = kmem_asprintf("%s@%s", | |
3378 | drc->drc_tofs, drc->drc_tosnap); | |
3379 | zvol_create_minor(snapname); | |
3380 | kmem_strfree(snapname); | |
03916905 PD |
3381 | } |
3382 | return (error); | |
3383 | } | |
3384 | ||
3385 | /* | |
3386 | * Return TRUE if this objset is currently being received into. | |
3387 | */ | |
3388 | boolean_t | |
3389 | dmu_objset_is_receiving(objset_t *os) | |
3390 | { | |
3391 | return (os->os_dsl_dataset != NULL && | |
3392 | os->os_dsl_dataset->ds_owner == dmu_recv_tag); | |
3393 | } | |
3394 | ||
03fdcb9a MM |
3395 | ZFS_MODULE_PARAM(zfs_recv, zfs_recv_, queue_length, INT, ZMOD_RW, |
3396 | "Maximum receive queue length"); | |
30af21b0 | 3397 | |
03fdcb9a MM |
3398 | ZFS_MODULE_PARAM(zfs_recv, zfs_recv_, queue_ff, INT, ZMOD_RW, |
3399 | "Receive queue fill fraction"); | |
7261fc2e MA |
3400 | |
3401 | ZFS_MODULE_PARAM(zfs_recv, zfs_recv_, write_batch_size, INT, ZMOD_RW, | |
3402 | "Maximum amount of writes to batch into one transaction"); |