]>
Commit | Line | Data |
---|---|---|
34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
241b5415 | 23 | * Copyright (c) 2011, 2015 by Delphix. All rights reserved. |
8d35c149 | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
788eb90c | 25 | * Copyright (c) 2014, Joyent, Inc. All rights reserved. |
5dbd68a3 | 26 | * Copyright (c) 2011, 2014 by Delphix. All rights reserved. |
8d35c149 | 27 | */ |
34dc7c2f | 28 | |
34dc7c2f BB |
29 | #include <sys/dmu.h> |
30 | #include <sys/dmu_impl.h> | |
31 | #include <sys/dmu_tx.h> | |
32 | #include <sys/dbuf.h> | |
33 | #include <sys/dnode.h> | |
34 | #include <sys/zfs_context.h> | |
35 | #include <sys/dmu_objset.h> | |
36 | #include <sys/dmu_traverse.h> | |
37 | #include <sys/dsl_dataset.h> | |
38 | #include <sys/dsl_dir.h> | |
428870ff | 39 | #include <sys/dsl_prop.h> |
34dc7c2f BB |
40 | #include <sys/dsl_pool.h> |
41 | #include <sys/dsl_synctask.h> | |
044baf00 | 42 | #include <sys/spa_impl.h> |
34dc7c2f BB |
43 | #include <sys/zfs_ioctl.h> |
44 | #include <sys/zap.h> | |
45 | #include <sys/zio_checksum.h> | |
428870ff BB |
46 | #include <sys/zfs_znode.h> |
47 | #include <zfs_fletcher.h> | |
48 | #include <sys/avl.h> | |
49 | #include <sys/ddt.h> | |
572e2857 | 50 | #include <sys/zfs_onexit.h> |
13fe0198 MA |
51 | #include <sys/dmu_send.h> |
52 | #include <sys/dsl_destroy.h> | |
9b67f605 | 53 | #include <sys/blkptr.h> |
da536844 | 54 | #include <sys/dsl_bookmark.h> |
9b67f605 | 55 | #include <sys/zfeature.h> |
34dc7c2f | 56 | |
330d06f9 MA |
57 | /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ |
58 | int zfs_send_corrupt_data = B_FALSE; | |
59 | ||
34dc7c2f | 60 | static char *dmu_recv_tag = "dmu_recv_tag"; |
13fe0198 | 61 | static const char *recv_clone_name = "%recv"; |
34dc7c2f | 62 | |
044baf00 BB |
63 | typedef struct dump_bytes_io { |
64 | dmu_sendarg_t *dbi_dsp; | |
65 | void *dbi_buf; | |
66 | int dbi_len; | |
67 | } dump_bytes_io_t; | |
68 | ||
69 | static void | |
70 | dump_bytes_strategy(void *arg) | |
34dc7c2f | 71 | { |
044baf00 BB |
72 | dump_bytes_io_t *dbi = (dump_bytes_io_t *)arg; |
73 | dmu_sendarg_t *dsp = dbi->dbi_dsp; | |
37abac6d | 74 | dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset; |
34dc7c2f | 75 | ssize_t resid; /* have to get resid to get detailed errno */ |
c99c9001 | 76 | ASSERT0(dbi->dbi_len % 8); |
34dc7c2f | 77 | |
044baf00 | 78 | fletcher_4_incremental_native(dbi->dbi_buf, dbi->dbi_len, &dsp->dsa_zc); |
37abac6d | 79 | dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp, |
044baf00 | 80 | (caddr_t)dbi->dbi_buf, dbi->dbi_len, |
34dc7c2f | 81 | 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid); |
37abac6d BP |
82 | |
83 | mutex_enter(&ds->ds_sendstream_lock); | |
044baf00 | 84 | *dsp->dsa_off += dbi->dbi_len; |
37abac6d | 85 | mutex_exit(&ds->ds_sendstream_lock); |
044baf00 BB |
86 | } |
87 | ||
88 | static int | |
89 | dump_bytes(dmu_sendarg_t *dsp, void *buf, int len) | |
90 | { | |
91 | dump_bytes_io_t dbi; | |
92 | ||
93 | dbi.dbi_dsp = dsp; | |
94 | dbi.dbi_buf = buf; | |
95 | dbi.dbi_len = len; | |
96 | ||
97 | /* | |
98 | * The vn_rdwr() call is performed in a taskq to ensure that there is | |
99 | * always enough stack space to write safely to the target filesystem. | |
100 | * The ZIO_TYPE_FREE threads are used because there can be a lot of | |
101 | * them and they are used in vdev_file.c for a similar purpose. | |
102 | */ | |
103 | spa_taskq_dispatch_sync(dmu_objset_spa(dsp->dsa_os), ZIO_TYPE_FREE, | |
104 | ZIO_TASKQ_ISSUE, dump_bytes_strategy, &dbi, TQ_SLEEP); | |
37abac6d BP |
105 | |
106 | return (dsp->dsa_err); | |
34dc7c2f BB |
107 | } |
108 | ||
109 | static int | |
37abac6d | 110 | dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, |
34dc7c2f BB |
111 | uint64_t length) |
112 | { | |
37abac6d | 113 | struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); |
428870ff | 114 | |
ea97f8ce MA |
115 | /* |
116 | * When we receive a free record, dbuf_free_range() assumes | |
117 | * that the receiving system doesn't have any dbufs in the range | |
118 | * being freed. This is always true because there is a one-record | |
119 | * constraint: we only send one WRITE record for any given | |
120 | * object+offset. We know that the one-record constraint is | |
121 | * true because we always send data in increasing order by | |
122 | * object,offset. | |
123 | * | |
124 | * If the increasing-order constraint ever changes, we should find | |
125 | * another way to assert that the one-record constraint is still | |
126 | * satisfied. | |
127 | */ | |
128 | ASSERT(object > dsp->dsa_last_data_object || | |
129 | (object == dsp->dsa_last_data_object && | |
130 | offset > dsp->dsa_last_data_offset)); | |
131 | ||
132 | /* | |
133 | * If we are doing a non-incremental send, then there can't | |
134 | * be any data in the dataset we're receiving into. Therefore | |
135 | * a free record would simply be a no-op. Save space by not | |
136 | * sending it to begin with. | |
137 | */ | |
138 | if (!dsp->dsa_incremental) | |
139 | return (0); | |
140 | ||
c578f007 SK |
141 | if (length != -1ULL && offset + length < offset) |
142 | length = -1ULL; | |
143 | ||
428870ff BB |
144 | /* |
145 | * If there is a pending op, but it's not PENDING_FREE, push it out, | |
146 | * since free block aggregation can only be done for blocks of the | |
147 | * same type (i.e., DRR_FREE records can only be aggregated with | |
148 | * other DRR_FREE records. DRR_FREEOBJECTS records can only be | |
149 | * aggregated with other DRR_FREEOBJECTS records. | |
150 | */ | |
37abac6d BP |
151 | if (dsp->dsa_pending_op != PENDING_NONE && |
152 | dsp->dsa_pending_op != PENDING_FREE) { | |
153 | if (dump_bytes(dsp, dsp->dsa_drr, | |
154 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 155 | return (SET_ERROR(EINTR)); |
37abac6d | 156 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
157 | } |
158 | ||
37abac6d | 159 | if (dsp->dsa_pending_op == PENDING_FREE) { |
428870ff BB |
160 | /* |
161 | * There should never be a PENDING_FREE if length is -1 | |
162 | * (because dump_dnode is the only place where this | |
163 | * function is called with a -1, and only after flushing | |
164 | * any pending record). | |
165 | */ | |
166 | ASSERT(length != -1ULL); | |
167 | /* | |
168 | * Check to see whether this free block can be aggregated | |
169 | * with pending one. | |
170 | */ | |
171 | if (drrf->drr_object == object && drrf->drr_offset + | |
172 | drrf->drr_length == offset) { | |
173 | drrf->drr_length += length; | |
174 | return (0); | |
175 | } else { | |
176 | /* not a continuation. Push out pending record */ | |
37abac6d | 177 | if (dump_bytes(dsp, dsp->dsa_drr, |
428870ff | 178 | sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 179 | return (SET_ERROR(EINTR)); |
37abac6d | 180 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
181 | } |
182 | } | |
183 | /* create a FREE record and make it pending */ | |
37abac6d BP |
184 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
185 | dsp->dsa_drr->drr_type = DRR_FREE; | |
428870ff BB |
186 | drrf->drr_object = object; |
187 | drrf->drr_offset = offset; | |
188 | drrf->drr_length = length; | |
37abac6d | 189 | drrf->drr_toguid = dsp->dsa_toguid; |
428870ff | 190 | if (length == -1ULL) { |
37abac6d BP |
191 | if (dump_bytes(dsp, dsp->dsa_drr, |
192 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 193 | return (SET_ERROR(EINTR)); |
428870ff | 194 | } else { |
37abac6d | 195 | dsp->dsa_pending_op = PENDING_FREE; |
428870ff | 196 | } |
34dc7c2f | 197 | |
34dc7c2f BB |
198 | return (0); |
199 | } | |
200 | ||
201 | static int | |
9b67f605 | 202 | dump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, |
428870ff | 203 | uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) |
34dc7c2f | 204 | { |
37abac6d | 205 | struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); |
428870ff | 206 | |
ea97f8ce MA |
207 | /* |
208 | * We send data in increasing object, offset order. | |
209 | * See comment in dump_free() for details. | |
210 | */ | |
211 | ASSERT(object > dsp->dsa_last_data_object || | |
212 | (object == dsp->dsa_last_data_object && | |
213 | offset > dsp->dsa_last_data_offset)); | |
214 | dsp->dsa_last_data_object = object; | |
215 | dsp->dsa_last_data_offset = offset + blksz - 1; | |
428870ff BB |
216 | |
217 | /* | |
218 | * If there is any kind of pending aggregation (currently either | |
219 | * a grouping of free objects or free blocks), push it out to | |
220 | * the stream, since aggregation can't be done across operations | |
221 | * of different types. | |
222 | */ | |
37abac6d BP |
223 | if (dsp->dsa_pending_op != PENDING_NONE) { |
224 | if (dump_bytes(dsp, dsp->dsa_drr, | |
225 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 226 | return (SET_ERROR(EINTR)); |
37abac6d | 227 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 228 | } |
34dc7c2f | 229 | /* write a DATA record */ |
37abac6d BP |
230 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
231 | dsp->dsa_drr->drr_type = DRR_WRITE; | |
428870ff BB |
232 | drrw->drr_object = object; |
233 | drrw->drr_type = type; | |
234 | drrw->drr_offset = offset; | |
235 | drrw->drr_length = blksz; | |
37abac6d | 236 | drrw->drr_toguid = dsp->dsa_toguid; |
f1512ee6 | 237 | if (bp == NULL || BP_IS_EMBEDDED(bp)) { |
9b67f605 | 238 | /* |
f1512ee6 MA |
239 | * There's no pre-computed checksum for partial-block |
240 | * writes or embedded BP's, so (like | |
241 | * fletcher4-checkummed blocks) userland will have to | |
242 | * compute a dedup-capable checksum itself. | |
9b67f605 MA |
243 | */ |
244 | drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; | |
245 | } else { | |
246 | drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); | |
247 | if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup) | |
248 | drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; | |
249 | DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); | |
250 | DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); | |
251 | DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); | |
252 | drrw->drr_key.ddk_cksum = bp->blk_cksum; | |
253 | } | |
428870ff | 254 | |
37abac6d | 255 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 256 | return (SET_ERROR(EINTR)); |
37abac6d | 257 | if (dump_bytes(dsp, data, blksz) != 0) |
2e528b49 | 258 | return (SET_ERROR(EINTR)); |
428870ff BB |
259 | return (0); |
260 | } | |
261 | ||
9b67f605 MA |
262 | static int |
263 | dump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, | |
264 | int blksz, const blkptr_t *bp) | |
265 | { | |
266 | char buf[BPE_PAYLOAD_SIZE]; | |
267 | struct drr_write_embedded *drrw = | |
268 | &(dsp->dsa_drr->drr_u.drr_write_embedded); | |
269 | ||
270 | if (dsp->dsa_pending_op != PENDING_NONE) { | |
271 | if (dump_bytes(dsp, dsp->dsa_drr, | |
272 | sizeof (dmu_replay_record_t)) != 0) | |
273 | return (EINTR); | |
274 | dsp->dsa_pending_op = PENDING_NONE; | |
275 | } | |
276 | ||
277 | ASSERT(BP_IS_EMBEDDED(bp)); | |
278 | ||
279 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); | |
280 | dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; | |
281 | drrw->drr_object = object; | |
282 | drrw->drr_offset = offset; | |
283 | drrw->drr_length = blksz; | |
284 | drrw->drr_toguid = dsp->dsa_toguid; | |
285 | drrw->drr_compression = BP_GET_COMPRESS(bp); | |
286 | drrw->drr_etype = BPE_GET_ETYPE(bp); | |
287 | drrw->drr_lsize = BPE_GET_LSIZE(bp); | |
288 | drrw->drr_psize = BPE_GET_PSIZE(bp); | |
289 | ||
290 | decode_embedded_bp_compressed(bp, buf); | |
291 | ||
292 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) | |
293 | return (EINTR); | |
294 | if (dump_bytes(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) | |
295 | return (EINTR); | |
296 | return (0); | |
297 | } | |
298 | ||
428870ff | 299 | static int |
37abac6d | 300 | dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) |
428870ff | 301 | { |
37abac6d | 302 | struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); |
428870ff | 303 | |
37abac6d BP |
304 | if (dsp->dsa_pending_op != PENDING_NONE) { |
305 | if (dump_bytes(dsp, dsp->dsa_drr, | |
306 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 307 | return (SET_ERROR(EINTR)); |
37abac6d | 308 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
309 | } |
310 | ||
311 | /* write a SPILL record */ | |
37abac6d BP |
312 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
313 | dsp->dsa_drr->drr_type = DRR_SPILL; | |
428870ff BB |
314 | drrs->drr_object = object; |
315 | drrs->drr_length = blksz; | |
37abac6d | 316 | drrs->drr_toguid = dsp->dsa_toguid; |
34dc7c2f | 317 | |
37abac6d | 318 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t))) |
2e528b49 | 319 | return (SET_ERROR(EINTR)); |
37abac6d | 320 | if (dump_bytes(dsp, data, blksz)) |
2e528b49 | 321 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
322 | return (0); |
323 | } | |
324 | ||
325 | static int | |
37abac6d | 326 | dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) |
34dc7c2f | 327 | { |
37abac6d | 328 | struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); |
428870ff | 329 | |
ea97f8ce MA |
330 | /* See comment in dump_free(). */ |
331 | if (!dsp->dsa_incremental) | |
332 | return (0); | |
333 | ||
428870ff BB |
334 | /* |
335 | * If there is a pending op, but it's not PENDING_FREEOBJECTS, | |
336 | * push it out, since free block aggregation can only be done for | |
337 | * blocks of the same type (i.e., DRR_FREE records can only be | |
338 | * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records | |
339 | * can only be aggregated with other DRR_FREEOBJECTS records. | |
340 | */ | |
37abac6d BP |
341 | if (dsp->dsa_pending_op != PENDING_NONE && |
342 | dsp->dsa_pending_op != PENDING_FREEOBJECTS) { | |
343 | if (dump_bytes(dsp, dsp->dsa_drr, | |
344 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 345 | return (SET_ERROR(EINTR)); |
37abac6d | 346 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 347 | } |
37abac6d | 348 | if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { |
428870ff BB |
349 | /* |
350 | * See whether this free object array can be aggregated | |
351 | * with pending one | |
352 | */ | |
353 | if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { | |
354 | drrfo->drr_numobjs += numobjs; | |
355 | return (0); | |
356 | } else { | |
357 | /* can't be aggregated. Push out pending record */ | |
37abac6d | 358 | if (dump_bytes(dsp, dsp->dsa_drr, |
428870ff | 359 | sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 360 | return (SET_ERROR(EINTR)); |
37abac6d | 361 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
362 | } |
363 | } | |
364 | ||
34dc7c2f | 365 | /* write a FREEOBJECTS record */ |
37abac6d BP |
366 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
367 | dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; | |
428870ff BB |
368 | drrfo->drr_firstobj = firstobj; |
369 | drrfo->drr_numobjs = numobjs; | |
37abac6d | 370 | drrfo->drr_toguid = dsp->dsa_toguid; |
428870ff | 371 | |
37abac6d | 372 | dsp->dsa_pending_op = PENDING_FREEOBJECTS; |
34dc7c2f | 373 | |
34dc7c2f BB |
374 | return (0); |
375 | } | |
376 | ||
377 | static int | |
37abac6d | 378 | dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) |
34dc7c2f | 379 | { |
37abac6d | 380 | struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); |
428870ff | 381 | |
34dc7c2f | 382 | if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) |
37abac6d | 383 | return (dump_freeobjects(dsp, object, 1)); |
34dc7c2f | 384 | |
37abac6d BP |
385 | if (dsp->dsa_pending_op != PENDING_NONE) { |
386 | if (dump_bytes(dsp, dsp->dsa_drr, | |
387 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 388 | return (SET_ERROR(EINTR)); |
37abac6d | 389 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
390 | } |
391 | ||
34dc7c2f | 392 | /* write an OBJECT record */ |
37abac6d BP |
393 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
394 | dsp->dsa_drr->drr_type = DRR_OBJECT; | |
428870ff BB |
395 | drro->drr_object = object; |
396 | drro->drr_type = dnp->dn_type; | |
397 | drro->drr_bonustype = dnp->dn_bonustype; | |
398 | drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
399 | drro->drr_bonuslen = dnp->dn_bonuslen; | |
400 | drro->drr_checksumtype = dnp->dn_checksum; | |
401 | drro->drr_compress = dnp->dn_compress; | |
37abac6d | 402 | drro->drr_toguid = dsp->dsa_toguid; |
428870ff | 403 | |
f1512ee6 MA |
404 | if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && |
405 | drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) | |
406 | drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; | |
407 | ||
37abac6d | 408 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 409 | return (SET_ERROR(EINTR)); |
34dc7c2f | 410 | |
37abac6d | 411 | if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) |
2e528b49 | 412 | return (SET_ERROR(EINTR)); |
34dc7c2f | 413 | |
ea97f8ce | 414 | /* Free anything past the end of the file. */ |
37abac6d | 415 | if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * |
ea97f8ce | 416 | (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) |
2e528b49 | 417 | return (SET_ERROR(EINTR)); |
13fe0198 | 418 | if (dsp->dsa_err != 0) |
2e528b49 | 419 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
420 | return (0); |
421 | } | |
422 | ||
9b67f605 MA |
423 | static boolean_t |
424 | backup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) | |
425 | { | |
426 | if (!BP_IS_EMBEDDED(bp)) | |
427 | return (B_FALSE); | |
428 | ||
429 | /* | |
430 | * Compression function must be legacy, or explicitly enabled. | |
431 | */ | |
432 | if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && | |
433 | !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4))) | |
434 | return (B_FALSE); | |
435 | ||
436 | /* | |
437 | * Embed type must be explicitly enabled. | |
438 | */ | |
439 | switch (BPE_GET_ETYPE(bp)) { | |
440 | case BP_EMBEDDED_TYPE_DATA: | |
441 | if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) | |
442 | return (B_TRUE); | |
443 | break; | |
444 | default: | |
445 | return (B_FALSE); | |
446 | } | |
447 | return (B_FALSE); | |
448 | } | |
449 | ||
34dc7c2f BB |
450 | #define BP_SPAN(dnp, level) \ |
451 | (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \ | |
452 | (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) | |
453 | ||
428870ff | 454 | /* ARGSUSED */ |
34dc7c2f | 455 | static int |
294f6806 | 456 | backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, |
5dbd68a3 | 457 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) |
34dc7c2f | 458 | { |
37abac6d | 459 | dmu_sendarg_t *dsp = arg; |
34dc7c2f | 460 | dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; |
34dc7c2f BB |
461 | int err = 0; |
462 | ||
463 | if (issig(JUSTLOOKING) && issig(FORREAL)) | |
2e528b49 | 464 | return (SET_ERROR(EINTR)); |
34dc7c2f | 465 | |
428870ff BB |
466 | if (zb->zb_object != DMU_META_DNODE_OBJECT && |
467 | DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { | |
9babb374 | 468 | return (0); |
da536844 MA |
469 | } else if (zb->zb_level == ZB_ZIL_LEVEL) { |
470 | /* | |
471 | * If we are sending a non-snapshot (which is allowed on | |
472 | * read-only pools), it may have a ZIL, which must be ignored. | |
473 | */ | |
474 | return (0); | |
b0bc7a84 MG |
475 | } else if (BP_IS_HOLE(bp) && |
476 | zb->zb_object == DMU_META_DNODE_OBJECT) { | |
b128c09f BB |
477 | uint64_t span = BP_SPAN(dnp, zb->zb_level); |
478 | uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; | |
37abac6d | 479 | err = dump_freeobjects(dsp, dnobj, span >> DNODE_SHIFT); |
b0bc7a84 | 480 | } else if (BP_IS_HOLE(bp)) { |
b128c09f | 481 | uint64_t span = BP_SPAN(dnp, zb->zb_level); |
37abac6d | 482 | err = dump_free(dsp, zb->zb_object, zb->zb_blkid * span, span); |
b128c09f BB |
483 | } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { |
484 | return (0); | |
485 | } else if (type == DMU_OT_DNODE) { | |
486 | dnode_phys_t *blk; | |
34dc7c2f BB |
487 | int i; |
488 | int blksz = BP_GET_LSIZE(bp); | |
2a432414 | 489 | arc_flags_t aflags = ARC_FLAG_WAIT; |
b128c09f BB |
490 | arc_buf_t *abuf; |
491 | ||
294f6806 GW |
492 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
493 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
494 | &aflags, zb) != 0) | |
2e528b49 | 495 | return (SET_ERROR(EIO)); |
34dc7c2f | 496 | |
b128c09f | 497 | blk = abuf->b_data; |
34dc7c2f | 498 | for (i = 0; i < blksz >> DNODE_SHIFT; i++) { |
b128c09f BB |
499 | uint64_t dnobj = (zb->zb_blkid << |
500 | (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i; | |
37abac6d | 501 | err = dump_dnode(dsp, dnobj, blk+i); |
13fe0198 | 502 | if (err != 0) |
34dc7c2f BB |
503 | break; |
504 | } | |
b128c09f | 505 | (void) arc_buf_remove_ref(abuf, &abuf); |
428870ff | 506 | } else if (type == DMU_OT_SA) { |
2a432414 | 507 | arc_flags_t aflags = ARC_FLAG_WAIT; |
b128c09f | 508 | arc_buf_t *abuf; |
34dc7c2f | 509 | int blksz = BP_GET_LSIZE(bp); |
b128c09f | 510 | |
294f6806 GW |
511 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
512 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
513 | &aflags, zb) != 0) | |
2e528b49 | 514 | return (SET_ERROR(EIO)); |
b128c09f | 515 | |
37abac6d | 516 | err = dump_spill(dsp, zb->zb_object, blksz, abuf->b_data); |
428870ff | 517 | (void) arc_buf_remove_ref(abuf, &abuf); |
9b67f605 MA |
518 | } else if (backup_do_embed(dsp, bp)) { |
519 | /* it's an embedded level-0 block of a regular object */ | |
520 | int blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
521 | err = dump_write_embedded(dsp, zb->zb_object, | |
522 | zb->zb_blkid * blksz, blksz, bp); | |
428870ff | 523 | } else { /* it's a level-0 block of a regular object */ |
f1512ee6 | 524 | uint64_t offset; |
2a432414 | 525 | arc_flags_t aflags = ARC_FLAG_WAIT; |
428870ff BB |
526 | arc_buf_t *abuf; |
527 | int blksz = BP_GET_LSIZE(bp); | |
528 | ||
9b67f605 | 529 | ASSERT3U(blksz, ==, dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); |
da536844 | 530 | ASSERT0(zb->zb_level); |
294f6806 GW |
531 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
532 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
533 | &aflags, zb) != 0) { | |
330d06f9 MA |
534 | if (zfs_send_corrupt_data) { |
535 | uint64_t *ptr; | |
536 | /* Send a block filled with 0x"zfs badd bloc" */ | |
537 | abuf = arc_buf_alloc(spa, blksz, &abuf, | |
538 | ARC_BUFC_DATA); | |
539 | for (ptr = abuf->b_data; | |
540 | (char *)ptr < (char *)abuf->b_data + blksz; | |
541 | ptr++) | |
dd26aa53 | 542 | *ptr = 0x2f5baddb10cULL; |
330d06f9 | 543 | } else { |
2e528b49 | 544 | return (SET_ERROR(EIO)); |
330d06f9 MA |
545 | } |
546 | } | |
428870ff | 547 | |
f1512ee6 MA |
548 | offset = zb->zb_blkid * blksz; |
549 | ||
550 | if (!(dsp->dsa_featureflags & | |
551 | DMU_BACKUP_FEATURE_LARGE_BLOCKS) && | |
552 | blksz > SPA_OLD_MAXBLOCKSIZE) { | |
553 | char *buf = abuf->b_data; | |
554 | while (blksz > 0 && err == 0) { | |
555 | int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); | |
556 | err = dump_write(dsp, type, zb->zb_object, | |
557 | offset, n, NULL, buf); | |
558 | offset += n; | |
559 | buf += n; | |
560 | blksz -= n; | |
561 | } | |
562 | } else { | |
563 | err = dump_write(dsp, type, zb->zb_object, | |
564 | offset, blksz, bp, abuf->b_data); | |
565 | } | |
b128c09f | 566 | (void) arc_buf_remove_ref(abuf, &abuf); |
34dc7c2f BB |
567 | } |
568 | ||
569 | ASSERT(err == 0 || err == EINTR); | |
570 | return (err); | |
571 | } | |
572 | ||
6f1ffb06 | 573 | /* |
da536844 | 574 | * Releases dp using the specified tag. |
6f1ffb06 | 575 | */ |
13fe0198 MA |
576 | static int |
577 | dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *ds, | |
9b67f605 | 578 | zfs_bookmark_phys_t *fromzb, boolean_t is_clone, boolean_t embedok, |
f1512ee6 | 579 | boolean_t large_block_ok, int outfd, vnode_t *vp, offset_t *off) |
34dc7c2f | 580 | { |
13fe0198 | 581 | objset_t *os; |
34dc7c2f | 582 | dmu_replay_record_t *drr; |
37abac6d | 583 | dmu_sendarg_t *dsp; |
34dc7c2f BB |
584 | int err; |
585 | uint64_t fromtxg = 0; | |
9b67f605 | 586 | uint64_t featureflags = 0; |
34dc7c2f | 587 | |
13fe0198 MA |
588 | err = dmu_objset_from_ds(ds, &os); |
589 | if (err != 0) { | |
13fe0198 MA |
590 | dsl_pool_rele(dp, tag); |
591 | return (err); | |
592 | } | |
34dc7c2f | 593 | |
34dc7c2f BB |
594 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
595 | drr->drr_type = DRR_BEGIN; | |
596 | drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
428870ff BB |
597 | DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, |
598 | DMU_SUBSTREAM); | |
599 | ||
600 | #ifdef _KERNEL | |
13fe0198 | 601 | if (dmu_objset_type(os) == DMU_OST_ZFS) { |
428870ff | 602 | uint64_t version; |
13fe0198 | 603 | if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { |
37abac6d | 604 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
13fe0198 | 605 | dsl_pool_rele(dp, tag); |
2e528b49 | 606 | return (SET_ERROR(EINVAL)); |
37abac6d | 607 | } |
13fe0198 | 608 | if (version >= ZPL_VERSION_SA) { |
9b67f605 | 609 | featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; |
428870ff BB |
610 | } |
611 | } | |
612 | #endif | |
613 | ||
241b5415 | 614 | if (large_block_ok && ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) |
f1512ee6 | 615 | featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; |
9b67f605 MA |
616 | if (embedok && |
617 | spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
618 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; | |
619 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) | |
620 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; | |
621 | } else { | |
622 | embedok = B_FALSE; | |
623 | } | |
624 | ||
625 | DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, | |
626 | featureflags); | |
627 | ||
34dc7c2f | 628 | drr->drr_u.drr_begin.drr_creation_time = |
d683ddbb | 629 | dsl_dataset_phys(ds)->ds_creation_time; |
13fe0198 | 630 | drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); |
da536844 | 631 | if (is_clone) |
34dc7c2f | 632 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; |
d683ddbb JG |
633 | drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(ds)->ds_guid; |
634 | if (dsl_dataset_phys(ds)->ds_flags & DS_FLAG_CI_DATASET) | |
34dc7c2f BB |
635 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; |
636 | ||
da536844 MA |
637 | if (fromzb != NULL) { |
638 | drr->drr_u.drr_begin.drr_fromguid = fromzb->zbm_guid; | |
639 | fromtxg = fromzb->zbm_creation_txg; | |
640 | } | |
34dc7c2f | 641 | dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname); |
0c66c32d | 642 | if (!ds->ds_is_snapshot) { |
da536844 MA |
643 | (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", |
644 | sizeof (drr->drr_u.drr_begin.drr_toname)); | |
13fe0198 | 645 | } |
34dc7c2f | 646 | |
37abac6d BP |
647 | dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); |
648 | ||
649 | dsp->dsa_drr = drr; | |
650 | dsp->dsa_vp = vp; | |
651 | dsp->dsa_outfd = outfd; | |
652 | dsp->dsa_proc = curproc; | |
13fe0198 | 653 | dsp->dsa_os = os; |
37abac6d | 654 | dsp->dsa_off = off; |
d683ddbb | 655 | dsp->dsa_toguid = dsl_dataset_phys(ds)->ds_guid; |
37abac6d BP |
656 | ZIO_SET_CHECKSUM(&dsp->dsa_zc, 0, 0, 0, 0); |
657 | dsp->dsa_pending_op = PENDING_NONE; | |
da536844 | 658 | dsp->dsa_incremental = (fromzb != NULL); |
9b67f605 | 659 | dsp->dsa_featureflags = featureflags; |
37abac6d BP |
660 | |
661 | mutex_enter(&ds->ds_sendstream_lock); | |
662 | list_insert_head(&ds->ds_sendstreams, dsp); | |
663 | mutex_exit(&ds->ds_sendstream_lock); | |
664 | ||
7ec09286 MA |
665 | dsl_dataset_long_hold(ds, FTAG); |
666 | dsl_pool_rele(dp, tag); | |
667 | ||
37abac6d BP |
668 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { |
669 | err = dsp->dsa_err; | |
670 | goto out; | |
34dc7c2f BB |
671 | } |
672 | ||
b128c09f | 673 | err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH, |
37abac6d | 674 | backup_cb, dsp); |
34dc7c2f | 675 | |
37abac6d BP |
676 | if (dsp->dsa_pending_op != PENDING_NONE) |
677 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 678 | err = SET_ERROR(EINTR); |
428870ff | 679 | |
13fe0198 MA |
680 | if (err != 0) { |
681 | if (err == EINTR && dsp->dsa_err != 0) | |
37abac6d BP |
682 | err = dsp->dsa_err; |
683 | goto out; | |
34dc7c2f BB |
684 | } |
685 | ||
686 | bzero(drr, sizeof (dmu_replay_record_t)); | |
687 | drr->drr_type = DRR_END; | |
37abac6d BP |
688 | drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; |
689 | drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; | |
34dc7c2f | 690 | |
37abac6d BP |
691 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { |
692 | err = dsp->dsa_err; | |
693 | goto out; | |
34dc7c2f BB |
694 | } |
695 | ||
37abac6d BP |
696 | out: |
697 | mutex_enter(&ds->ds_sendstream_lock); | |
698 | list_remove(&ds->ds_sendstreams, dsp); | |
699 | mutex_exit(&ds->ds_sendstream_lock); | |
700 | ||
34dc7c2f | 701 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
37abac6d | 702 | kmem_free(dsp, sizeof (dmu_sendarg_t)); |
34dc7c2f | 703 | |
13fe0198 | 704 | dsl_dataset_long_rele(ds, FTAG); |
13fe0198 | 705 | |
37abac6d | 706 | return (err); |
34dc7c2f BB |
707 | } |
708 | ||
330d06f9 | 709 | int |
13fe0198 | 710 | dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, |
f1512ee6 MA |
711 | boolean_t embedok, boolean_t large_block_ok, |
712 | int outfd, vnode_t *vp, offset_t *off) | |
13fe0198 MA |
713 | { |
714 | dsl_pool_t *dp; | |
715 | dsl_dataset_t *ds; | |
716 | dsl_dataset_t *fromds = NULL; | |
717 | int err; | |
718 | ||
719 | err = dsl_pool_hold(pool, FTAG, &dp); | |
720 | if (err != 0) | |
721 | return (err); | |
722 | ||
723 | err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); | |
724 | if (err != 0) { | |
725 | dsl_pool_rele(dp, FTAG); | |
726 | return (err); | |
727 | } | |
728 | ||
729 | if (fromsnap != 0) { | |
da536844 MA |
730 | zfs_bookmark_phys_t zb; |
731 | boolean_t is_clone; | |
732 | ||
13fe0198 MA |
733 | err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); |
734 | if (err != 0) { | |
735 | dsl_dataset_rele(ds, FTAG); | |
736 | dsl_pool_rele(dp, FTAG); | |
737 | return (err); | |
738 | } | |
da536844 MA |
739 | if (!dsl_dataset_is_before(ds, fromds, 0)) |
740 | err = SET_ERROR(EXDEV); | |
d683ddbb JG |
741 | zb.zbm_creation_time = |
742 | dsl_dataset_phys(fromds)->ds_creation_time; | |
743 | zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; | |
744 | zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; | |
da536844 MA |
745 | is_clone = (fromds->ds_dir != ds->ds_dir); |
746 | dsl_dataset_rele(fromds, FTAG); | |
f1512ee6 MA |
747 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, |
748 | embedok, large_block_ok, outfd, vp, off); | |
da536844 | 749 | } else { |
f1512ee6 MA |
750 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, |
751 | embedok, large_block_ok, outfd, vp, off); | |
13fe0198 | 752 | } |
da536844 MA |
753 | dsl_dataset_rele(ds, FTAG); |
754 | return (err); | |
13fe0198 MA |
755 | } |
756 | ||
757 | int | |
f1512ee6 MA |
758 | dmu_send(const char *tosnap, const char *fromsnap, |
759 | boolean_t embedok, boolean_t large_block_ok, | |
13fe0198 MA |
760 | int outfd, vnode_t *vp, offset_t *off) |
761 | { | |
762 | dsl_pool_t *dp; | |
763 | dsl_dataset_t *ds; | |
13fe0198 | 764 | int err; |
da536844 | 765 | boolean_t owned = B_FALSE; |
13fe0198 | 766 | |
da536844 | 767 | if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) |
2e528b49 | 768 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
769 | |
770 | err = dsl_pool_hold(tosnap, FTAG, &dp); | |
771 | if (err != 0) | |
772 | return (err); | |
773 | ||
da536844 MA |
774 | if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { |
775 | /* | |
776 | * We are sending a filesystem or volume. Ensure | |
777 | * that it doesn't change by owning the dataset. | |
778 | */ | |
779 | err = dsl_dataset_own(dp, tosnap, FTAG, &ds); | |
780 | owned = B_TRUE; | |
781 | } else { | |
782 | err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); | |
783 | } | |
13fe0198 MA |
784 | if (err != 0) { |
785 | dsl_pool_rele(dp, FTAG); | |
786 | return (err); | |
787 | } | |
788 | ||
789 | if (fromsnap != NULL) { | |
da536844 MA |
790 | zfs_bookmark_phys_t zb; |
791 | boolean_t is_clone = B_FALSE; | |
792 | int fsnamelen = strchr(tosnap, '@') - tosnap; | |
793 | ||
794 | /* | |
795 | * If the fromsnap is in a different filesystem, then | |
796 | * mark the send stream as a clone. | |
797 | */ | |
798 | if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || | |
799 | (fromsnap[fsnamelen] != '@' && | |
800 | fromsnap[fsnamelen] != '#')) { | |
801 | is_clone = B_TRUE; | |
802 | } | |
803 | ||
804 | if (strchr(fromsnap, '@')) { | |
805 | dsl_dataset_t *fromds; | |
806 | err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); | |
807 | if (err == 0) { | |
808 | if (!dsl_dataset_is_before(ds, fromds, 0)) | |
809 | err = SET_ERROR(EXDEV); | |
810 | zb.zbm_creation_time = | |
d683ddbb | 811 | dsl_dataset_phys(fromds)->ds_creation_time; |
da536844 | 812 | zb.zbm_creation_txg = |
d683ddbb JG |
813 | dsl_dataset_phys(fromds)->ds_creation_txg; |
814 | zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; | |
da536844 MA |
815 | is_clone = (ds->ds_dir != fromds->ds_dir); |
816 | dsl_dataset_rele(fromds, FTAG); | |
817 | } | |
818 | } else { | |
819 | err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); | |
820 | } | |
13fe0198 MA |
821 | if (err != 0) { |
822 | dsl_dataset_rele(ds, FTAG); | |
823 | dsl_pool_rele(dp, FTAG); | |
824 | return (err); | |
825 | } | |
f1512ee6 MA |
826 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, |
827 | embedok, large_block_ok, outfd, vp, off); | |
da536844 | 828 | } else { |
f1512ee6 MA |
829 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, |
830 | embedok, large_block_ok, outfd, vp, off); | |
13fe0198 | 831 | } |
da536844 MA |
832 | if (owned) |
833 | dsl_dataset_disown(ds, FTAG); | |
834 | else | |
835 | dsl_dataset_rele(ds, FTAG); | |
836 | return (err); | |
13fe0198 MA |
837 | } |
838 | ||
5dc8b736 MG |
839 | static int |
840 | dmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t size, | |
841 | uint64_t *sizep) | |
842 | { | |
843 | int err; | |
844 | /* | |
845 | * Assume that space (both on-disk and in-stream) is dominated by | |
846 | * data. We will adjust for indirect blocks and the copies property, | |
847 | * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). | |
848 | */ | |
849 | ||
850 | /* | |
851 | * Subtract out approximate space used by indirect blocks. | |
852 | * Assume most space is used by data blocks (non-indirect, non-dnode). | |
853 | * Assume all blocks are recordsize. Assume ditto blocks and | |
854 | * internal fragmentation counter out compression. | |
855 | * | |
856 | * Therefore, space used by indirect blocks is sizeof(blkptr_t) per | |
857 | * block, which we observe in practice. | |
858 | */ | |
859 | uint64_t recordsize; | |
860 | err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); | |
861 | if (err != 0) | |
862 | return (err); | |
863 | size -= size / recordsize * sizeof (blkptr_t); | |
864 | ||
865 | /* Add in the space for the record associated with each block. */ | |
866 | size += size / recordsize * sizeof (dmu_replay_record_t); | |
867 | ||
868 | *sizep = size; | |
869 | ||
870 | return (0); | |
871 | } | |
872 | ||
13fe0198 MA |
873 | int |
874 | dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) | |
330d06f9 | 875 | { |
330d06f9 | 876 | int err; |
5dc8b736 | 877 | uint64_t size; |
13fe0198 | 878 | |
fd0fd646 | 879 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
330d06f9 MA |
880 | |
881 | /* tosnap must be a snapshot */ | |
0c66c32d | 882 | if (!ds->ds_is_snapshot) |
2e528b49 | 883 | return (SET_ERROR(EINVAL)); |
330d06f9 | 884 | |
71e2fe41 AG |
885 | /* fromsnap, if provided, must be a snapshot */ |
886 | if (fromds != NULL && !fromds->ds_is_snapshot) | |
887 | return (SET_ERROR(EINVAL)); | |
888 | ||
6f1ffb06 MA |
889 | /* |
890 | * fromsnap must be an earlier snapshot from the same fs as tosnap, | |
891 | * or the origin's fs. | |
892 | */ | |
da536844 | 893 | if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) |
2e528b49 | 894 | return (SET_ERROR(EXDEV)); |
330d06f9 | 895 | |
330d06f9 MA |
896 | /* Get uncompressed size estimate of changed data. */ |
897 | if (fromds == NULL) { | |
d683ddbb | 898 | size = dsl_dataset_phys(ds)->ds_uncompressed_bytes; |
330d06f9 MA |
899 | } else { |
900 | uint64_t used, comp; | |
901 | err = dsl_dataset_space_written(fromds, ds, | |
902 | &used, &comp, &size); | |
13fe0198 | 903 | if (err != 0) |
330d06f9 MA |
904 | return (err); |
905 | } | |
906 | ||
5dc8b736 MG |
907 | err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); |
908 | return (err); | |
909 | } | |
330d06f9 | 910 | |
5dc8b736 MG |
911 | /* |
912 | * Simple callback used to traverse the blocks of a snapshot and sum their | |
913 | * uncompressed size | |
914 | */ | |
915 | /* ARGSUSED */ | |
916 | static int | |
917 | dmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, | |
918 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) | |
919 | { | |
920 | uint64_t *spaceptr = arg; | |
921 | if (bp != NULL && !BP_IS_HOLE(bp)) { | |
922 | *spaceptr += BP_GET_UCSIZE(bp); | |
923 | } | |
924 | return (0); | |
925 | } | |
926 | ||
927 | /* | |
928 | * Given a desination snapshot and a TXG, calculate the approximate size of a | |
929 | * send stream sent from that TXG. from_txg may be zero, indicating that the | |
930 | * whole snapshot will be sent. | |
931 | */ | |
932 | int | |
933 | dmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, | |
934 | uint64_t *sizep) | |
935 | { | |
5dc8b736 MG |
936 | int err; |
937 | uint64_t size = 0; | |
938 | ||
fd0fd646 | 939 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
5dc8b736 MG |
940 | |
941 | /* tosnap must be a snapshot */ | |
942 | if (!dsl_dataset_is_snapshot(ds)) | |
943 | return (SET_ERROR(EINVAL)); | |
944 | ||
945 | /* verify that from_txg is before the provided snapshot was taken */ | |
946 | if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { | |
947 | return (SET_ERROR(EXDEV)); | |
948 | } | |
330d06f9 | 949 | /* |
5dc8b736 MG |
950 | * traverse the blocks of the snapshot with birth times after |
951 | * from_txg, summing their uncompressed size | |
330d06f9 | 952 | */ |
5dc8b736 MG |
953 | err = traverse_dataset(ds, from_txg, TRAVERSE_POST, |
954 | dmu_calculate_send_traversal, &size); | |
955 | if (err) | |
330d06f9 | 956 | return (err); |
330d06f9 | 957 | |
5dc8b736 MG |
958 | err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); |
959 | return (err); | |
330d06f9 MA |
960 | } |
961 | ||
13fe0198 MA |
962 | typedef struct dmu_recv_begin_arg { |
963 | const char *drba_origin; | |
964 | dmu_recv_cookie_t *drba_cookie; | |
965 | cred_t *drba_cred; | |
19580676 | 966 | uint64_t drba_snapobj; |
13fe0198 | 967 | } dmu_recv_begin_arg_t; |
34dc7c2f | 968 | |
34dc7c2f | 969 | static int |
13fe0198 MA |
970 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, |
971 | uint64_t fromguid) | |
34dc7c2f | 972 | { |
34dc7c2f | 973 | uint64_t val; |
13fe0198 MA |
974 | int error; |
975 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
34dc7c2f | 976 | |
13fe0198 MA |
977 | /* temporary clone name must not exist */ |
978 | error = zap_lookup(dp->dp_meta_objset, | |
d683ddbb | 979 | dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, |
13fe0198 MA |
980 | 8, 1, &val); |
981 | if (error != ENOENT) | |
982 | return (error == 0 ? EBUSY : error); | |
983 | ||
572e2857 | 984 | /* new snapshot name must not exist */ |
13fe0198 | 985 | error = zap_lookup(dp->dp_meta_objset, |
d683ddbb JG |
986 | dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
987 | drba->drba_cookie->drc_tosnap, 8, 1, &val); | |
13fe0198 MA |
988 | if (error != ENOENT) |
989 | return (error == 0 ? EEXIST : error); | |
572e2857 | 990 | |
788eb90c JJ |
991 | /* |
992 | * Check snapshot limit before receiving. We'll recheck again at the | |
993 | * end, but might as well abort before receiving if we're already over | |
994 | * the limit. | |
995 | * | |
996 | * Note that we do not check the file system limit with | |
997 | * dsl_dir_fscount_check because the temporary %clones don't count | |
998 | * against that limit. | |
999 | */ | |
1000 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, | |
1001 | NULL, drba->drba_cred); | |
1002 | if (error != 0) | |
1003 | return (error); | |
1004 | ||
13fe0198 | 1005 | if (fromguid != 0) { |
19580676 | 1006 | dsl_dataset_t *snap; |
d683ddbb | 1007 | uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
19580676 MA |
1008 | |
1009 | /* Find snapshot in this dir that matches fromguid. */ | |
1010 | while (obj != 0) { | |
1011 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
1012 | &snap); | |
1013 | if (error != 0) | |
1014 | return (SET_ERROR(ENODEV)); | |
1015 | if (snap->ds_dir != ds->ds_dir) { | |
1016 | dsl_dataset_rele(snap, FTAG); | |
1017 | return (SET_ERROR(ENODEV)); | |
1018 | } | |
d683ddbb | 1019 | if (dsl_dataset_phys(snap)->ds_guid == fromguid) |
19580676 | 1020 | break; |
d683ddbb | 1021 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
1022 | dsl_dataset_rele(snap, FTAG); |
1023 | } | |
1024 | if (obj == 0) | |
2e528b49 | 1025 | return (SET_ERROR(ENODEV)); |
34dc7c2f | 1026 | |
19580676 MA |
1027 | if (drba->drba_cookie->drc_force) { |
1028 | drba->drba_snapobj = obj; | |
1029 | } else { | |
1030 | /* | |
1031 | * If we are not forcing, there must be no | |
1032 | * changes since fromsnap. | |
1033 | */ | |
1034 | if (dsl_dataset_modified_since_snap(ds, snap)) { | |
428870ff | 1035 | dsl_dataset_rele(snap, FTAG); |
19580676 | 1036 | return (SET_ERROR(ETXTBSY)); |
428870ff | 1037 | } |
19580676 | 1038 | drba->drba_snapobj = ds->ds_prev->ds_object; |
428870ff | 1039 | } |
19580676 MA |
1040 | |
1041 | dsl_dataset_rele(snap, FTAG); | |
428870ff | 1042 | } else { |
cf50a2b0 AG |
1043 | /* if full, then must be forced */ |
1044 | if (!drba->drba_cookie->drc_force) | |
1045 | return (SET_ERROR(EEXIST)); | |
1046 | /* start from $ORIGIN@$ORIGIN, if supported */ | |
1047 | drba->drba_snapobj = dp->dp_origin_snap != NULL ? | |
1048 | dp->dp_origin_snap->ds_object : 0; | |
428870ff | 1049 | } |
34dc7c2f | 1050 | |
34dc7c2f | 1051 | return (0); |
13fe0198 MA |
1052 | |
1053 | } | |
1054 | ||
1055 | static int | |
1056 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
1057 | { | |
1058 | dmu_recv_begin_arg_t *drba = arg; | |
1059 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1060 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1061 | uint64_t fromguid = drrb->drr_fromguid; | |
1062 | int flags = drrb->drr_flags; | |
1063 | int error; | |
9b67f605 | 1064 | uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
13fe0198 MA |
1065 | dsl_dataset_t *ds; |
1066 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1067 | ||
1068 | /* already checked */ | |
1069 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
1070 | ||
1071 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
1072 | DMU_COMPOUNDSTREAM || | |
1073 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
1074 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
2e528b49 | 1075 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1076 | |
1077 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
9b67f605 MA |
1078 | if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && |
1079 | spa_version(dp->dp_spa) < SPA_VERSION_SA) | |
1080 | return (SET_ERROR(ENOTSUP)); | |
1081 | ||
1082 | /* | |
1083 | * The receiving code doesn't know how to translate a WRITE_EMBEDDED | |
1084 | * record to a plan WRITE record, so the pool must have the | |
1085 | * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED | |
1086 | * records. Same with WRITE_EMBEDDED records that use LZ4 compression. | |
1087 | */ | |
1088 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && | |
1089 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) | |
1090 | return (SET_ERROR(ENOTSUP)); | |
1091 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && | |
1092 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) | |
2e528b49 | 1093 | return (SET_ERROR(ENOTSUP)); |
13fe0198 | 1094 | |
f1512ee6 MA |
1095 | /* |
1096 | * The receiving code doesn't know how to translate large blocks | |
1097 | * to smaller ones, so the pool must have the LARGE_BLOCKS | |
1098 | * feature enabled if the stream has LARGE_BLOCKS. | |
1099 | */ | |
1100 | if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && | |
1101 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) | |
1102 | return (SET_ERROR(ENOTSUP)); | |
1103 | ||
13fe0198 MA |
1104 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1105 | if (error == 0) { | |
1106 | /* target fs already exists; recv into temp clone */ | |
1107 | ||
1108 | /* Can't recv a clone into an existing fs */ | |
1109 | if (flags & DRR_FLAG_CLONE) { | |
1110 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1111 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1112 | } |
1113 | ||
1114 | error = recv_begin_check_existing_impl(drba, ds, fromguid); | |
1115 | dsl_dataset_rele(ds, FTAG); | |
1116 | } else if (error == ENOENT) { | |
1117 | /* target fs does not exist; must be a full backup or clone */ | |
1118 | char buf[MAXNAMELEN]; | |
1119 | ||
1120 | /* | |
1121 | * If it's a non-clone incremental, we are missing the | |
1122 | * target fs, so fail the recv. | |
1123 | */ | |
1124 | if (fromguid != 0 && !(flags & DRR_FLAG_CLONE)) | |
2e528b49 | 1125 | return (SET_ERROR(ENOENT)); |
13fe0198 MA |
1126 | |
1127 | /* Open the parent of tofs */ | |
1128 | ASSERT3U(strlen(tofs), <, MAXNAMELEN); | |
1129 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); | |
1130 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); | |
1131 | if (error != 0) | |
1132 | return (error); | |
1133 | ||
788eb90c JJ |
1134 | /* |
1135 | * Check filesystem and snapshot limits before receiving. We'll | |
1136 | * recheck snapshot limits again at the end (we create the | |
1137 | * filesystems and increment those counts during begin_sync). | |
1138 | */ | |
1139 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
1140 | ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); | |
1141 | if (error != 0) { | |
1142 | dsl_dataset_rele(ds, FTAG); | |
1143 | return (error); | |
1144 | } | |
1145 | ||
1146 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
1147 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); | |
1148 | if (error != 0) { | |
1149 | dsl_dataset_rele(ds, FTAG); | |
1150 | return (error); | |
1151 | } | |
1152 | ||
13fe0198 MA |
1153 | if (drba->drba_origin != NULL) { |
1154 | dsl_dataset_t *origin; | |
1155 | error = dsl_dataset_hold(dp, drba->drba_origin, | |
1156 | FTAG, &origin); | |
1157 | if (error != 0) { | |
1158 | dsl_dataset_rele(ds, FTAG); | |
1159 | return (error); | |
1160 | } | |
0c66c32d | 1161 | if (!origin->ds_is_snapshot) { |
13fe0198 MA |
1162 | dsl_dataset_rele(origin, FTAG); |
1163 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1164 | return (SET_ERROR(EINVAL)); |
13fe0198 | 1165 | } |
d683ddbb | 1166 | if (dsl_dataset_phys(origin)->ds_guid != fromguid) { |
13fe0198 MA |
1167 | dsl_dataset_rele(origin, FTAG); |
1168 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1169 | return (SET_ERROR(ENODEV)); |
13fe0198 MA |
1170 | } |
1171 | dsl_dataset_rele(origin, FTAG); | |
1172 | } | |
1173 | dsl_dataset_rele(ds, FTAG); | |
1174 | error = 0; | |
1175 | } | |
1176 | return (error); | |
34dc7c2f BB |
1177 | } |
1178 | ||
34dc7c2f | 1179 | static void |
13fe0198 | 1180 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1181 | { |
13fe0198 MA |
1182 | dmu_recv_begin_arg_t *drba = arg; |
1183 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1184 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1185 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1186 | dsl_dataset_t *ds, *newds; | |
34dc7c2f | 1187 | uint64_t dsobj; |
13fe0198 MA |
1188 | int error; |
1189 | uint64_t crflags; | |
1190 | ||
1191 | crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? | |
1192 | DS_FLAG_CI_DATASET : 0; | |
34dc7c2f | 1193 | |
13fe0198 MA |
1194 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1195 | if (error == 0) { | |
1196 | /* create temporary clone */ | |
19580676 MA |
1197 | dsl_dataset_t *snap = NULL; |
1198 | if (drba->drba_snapobj != 0) { | |
1199 | VERIFY0(dsl_dataset_hold_obj(dp, | |
1200 | drba->drba_snapobj, FTAG, &snap)); | |
1201 | } | |
13fe0198 | 1202 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, |
19580676 MA |
1203 | snap, crflags, drba->drba_cred, tx); |
1204 | dsl_dataset_rele(snap, FTAG); | |
13fe0198 MA |
1205 | dsl_dataset_rele(ds, FTAG); |
1206 | } else { | |
1207 | dsl_dir_t *dd; | |
1208 | const char *tail; | |
1209 | dsl_dataset_t *origin = NULL; | |
1210 | ||
1211 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
1212 | ||
1213 | if (drba->drba_origin != NULL) { | |
1214 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
1215 | FTAG, &origin)); | |
1216 | } | |
1217 | ||
1218 | /* Create new dataset. */ | |
1219 | dsobj = dsl_dataset_create_sync(dd, | |
1220 | strrchr(tofs, '/') + 1, | |
1221 | origin, crflags, drba->drba_cred, tx); | |
1222 | if (origin != NULL) | |
1223 | dsl_dataset_rele(origin, FTAG); | |
1224 | dsl_dir_rele(dd, FTAG); | |
1225 | drba->drba_cookie->drc_newfs = B_TRUE; | |
1226 | } | |
1227 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); | |
1228 | ||
1229 | dmu_buf_will_dirty(newds->ds_dbuf, tx); | |
d683ddbb | 1230 | dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; |
34dc7c2f | 1231 | |
428870ff BB |
1232 | /* |
1233 | * If we actually created a non-clone, we need to create the | |
1234 | * objset in our new dataset. | |
1235 | */ | |
13fe0198 | 1236 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { |
428870ff | 1237 | (void) dmu_objset_create_impl(dp->dp_spa, |
13fe0198 | 1238 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); |
428870ff | 1239 | } |
34dc7c2f | 1240 | |
13fe0198 | 1241 | drba->drba_cookie->drc_ds = newds; |
428870ff | 1242 | |
13fe0198 | 1243 | spa_history_log_internal_ds(newds, "receive", tx, ""); |
34dc7c2f BB |
1244 | } |
1245 | ||
34dc7c2f BB |
1246 | /* |
1247 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
1248 | * succeeds; otherwise we will leak the holds on the datasets. | |
1249 | */ | |
1250 | int | |
13fe0198 MA |
1251 | dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, |
1252 | boolean_t force, char *origin, dmu_recv_cookie_t *drc) | |
34dc7c2f | 1253 | { |
13fe0198 MA |
1254 | dmu_recv_begin_arg_t drba = { 0 }; |
1255 | dmu_replay_record_t *drr; | |
34dc7c2f BB |
1256 | |
1257 | bzero(drc, sizeof (dmu_recv_cookie_t)); | |
1258 | drc->drc_drrb = drrb; | |
1259 | drc->drc_tosnap = tosnap; | |
13fe0198 | 1260 | drc->drc_tofs = tofs; |
34dc7c2f | 1261 | drc->drc_force = force; |
788eb90c | 1262 | drc->drc_cred = CRED(); |
34dc7c2f | 1263 | |
13fe0198 MA |
1264 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) |
1265 | drc->drc_byteswap = B_TRUE; | |
1266 | else if (drrb->drr_magic != DMU_BACKUP_MAGIC) | |
2e528b49 | 1267 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1268 | |
13fe0198 MA |
1269 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
1270 | drr->drr_type = DRR_BEGIN; | |
1271 | drr->drr_u.drr_begin = *drc->drc_drrb; | |
1272 | if (drc->drc_byteswap) { | |
1273 | fletcher_4_incremental_byteswap(drr, | |
1274 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1275 | } else { | |
1276 | fletcher_4_incremental_native(drr, | |
1277 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1278 | } | |
1279 | kmem_free(drr, sizeof (dmu_replay_record_t)); | |
428870ff | 1280 | |
13fe0198 MA |
1281 | if (drc->drc_byteswap) { |
1282 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
1283 | drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); | |
1284 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); | |
1285 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
1286 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
1287 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
34dc7c2f BB |
1288 | } |
1289 | ||
13fe0198 MA |
1290 | drba.drba_origin = origin; |
1291 | drba.drba_cookie = drc; | |
1292 | drba.drba_cred = CRED(); | |
1293 | ||
1294 | return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, | |
3d45fdd6 | 1295 | &drba, 5, ZFS_SPACE_CHECK_NORMAL)); |
34dc7c2f BB |
1296 | } |
1297 | ||
1298 | struct restorearg { | |
1299 | int err; | |
13fe0198 | 1300 | boolean_t byteswap; |
34dc7c2f BB |
1301 | vnode_t *vp; |
1302 | char *buf; | |
1303 | uint64_t voff; | |
1304 | int bufsize; /* amount of memory allocated for buf */ | |
1305 | zio_cksum_t cksum; | |
572e2857 | 1306 | avl_tree_t *guid_to_ds_map; |
34dc7c2f BB |
1307 | }; |
1308 | ||
428870ff BB |
1309 | typedef struct guid_map_entry { |
1310 | uint64_t guid; | |
1311 | dsl_dataset_t *gme_ds; | |
1312 | avl_node_t avlnode; | |
1313 | } guid_map_entry_t; | |
1314 | ||
1315 | static int | |
1316 | guid_compare(const void *arg1, const void *arg2) | |
1317 | { | |
1318 | const guid_map_entry_t *gmep1 = arg1; | |
1319 | const guid_map_entry_t *gmep2 = arg2; | |
1320 | ||
1321 | if (gmep1->guid < gmep2->guid) | |
1322 | return (-1); | |
1323 | else if (gmep1->guid > gmep2->guid) | |
1324 | return (1); | |
1325 | return (0); | |
1326 | } | |
1327 | ||
572e2857 BB |
1328 | static void |
1329 | free_guid_map_onexit(void *arg) | |
1330 | { | |
1331 | avl_tree_t *ca = arg; | |
1332 | void *cookie = NULL; | |
1333 | guid_map_entry_t *gmep; | |
1334 | ||
1335 | while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { | |
13fe0198 | 1336 | dsl_dataset_long_rele(gmep->gme_ds, gmep); |
7ec09286 | 1337 | dsl_dataset_rele(gmep->gme_ds, gmep); |
572e2857 BB |
1338 | kmem_free(gmep, sizeof (guid_map_entry_t)); |
1339 | } | |
1340 | avl_destroy(ca); | |
1341 | kmem_free(ca, sizeof (avl_tree_t)); | |
1342 | } | |
1343 | ||
34dc7c2f | 1344 | static void * |
88904bb3 | 1345 | restore_read(struct restorearg *ra, int len, char *buf) |
34dc7c2f | 1346 | { |
34dc7c2f BB |
1347 | int done = 0; |
1348 | ||
88904bb3 MA |
1349 | if (buf == NULL) |
1350 | buf = ra->buf; | |
1351 | ||
34dc7c2f | 1352 | /* some things will require 8-byte alignment, so everything must */ |
c99c9001 | 1353 | ASSERT0(len % 8); |
f1512ee6 | 1354 | ASSERT3U(len, <=, ra->bufsize); |
34dc7c2f BB |
1355 | |
1356 | while (done < len) { | |
1357 | ssize_t resid; | |
1358 | ||
1359 | ra->err = vn_rdwr(UIO_READ, ra->vp, | |
88904bb3 | 1360 | buf + done, len - done, |
34dc7c2f BB |
1361 | ra->voff, UIO_SYSSPACE, FAPPEND, |
1362 | RLIM64_INFINITY, CRED(), &resid); | |
1363 | ||
1364 | if (resid == len - done) | |
2e528b49 | 1365 | ra->err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1366 | ra->voff += len - done - resid; |
1367 | done = len - resid; | |
13fe0198 | 1368 | if (ra->err != 0) |
34dc7c2f BB |
1369 | return (NULL); |
1370 | } | |
1371 | ||
1372 | ASSERT3U(done, ==, len); | |
34dc7c2f | 1373 | if (ra->byteswap) |
88904bb3 | 1374 | fletcher_4_incremental_byteswap(buf, len, &ra->cksum); |
34dc7c2f | 1375 | else |
88904bb3 MA |
1376 | fletcher_4_incremental_native(buf, len, &ra->cksum); |
1377 | return (buf); | |
34dc7c2f BB |
1378 | } |
1379 | ||
60948de1 | 1380 | noinline static void |
34dc7c2f BB |
1381 | backup_byteswap(dmu_replay_record_t *drr) |
1382 | { | |
1383 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
1384 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
1385 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1386 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
1387 | switch (drr->drr_type) { | |
1388 | case DRR_BEGIN: | |
1389 | DO64(drr_begin.drr_magic); | |
428870ff | 1390 | DO64(drr_begin.drr_versioninfo); |
34dc7c2f BB |
1391 | DO64(drr_begin.drr_creation_time); |
1392 | DO32(drr_begin.drr_type); | |
1393 | DO32(drr_begin.drr_flags); | |
1394 | DO64(drr_begin.drr_toguid); | |
1395 | DO64(drr_begin.drr_fromguid); | |
1396 | break; | |
1397 | case DRR_OBJECT: | |
1398 | DO64(drr_object.drr_object); | |
34dc7c2f BB |
1399 | DO32(drr_object.drr_type); |
1400 | DO32(drr_object.drr_bonustype); | |
1401 | DO32(drr_object.drr_blksz); | |
1402 | DO32(drr_object.drr_bonuslen); | |
428870ff | 1403 | DO64(drr_object.drr_toguid); |
34dc7c2f BB |
1404 | break; |
1405 | case DRR_FREEOBJECTS: | |
1406 | DO64(drr_freeobjects.drr_firstobj); | |
1407 | DO64(drr_freeobjects.drr_numobjs); | |
428870ff | 1408 | DO64(drr_freeobjects.drr_toguid); |
34dc7c2f BB |
1409 | break; |
1410 | case DRR_WRITE: | |
1411 | DO64(drr_write.drr_object); | |
1412 | DO32(drr_write.drr_type); | |
1413 | DO64(drr_write.drr_offset); | |
1414 | DO64(drr_write.drr_length); | |
428870ff BB |
1415 | DO64(drr_write.drr_toguid); |
1416 | DO64(drr_write.drr_key.ddk_cksum.zc_word[0]); | |
1417 | DO64(drr_write.drr_key.ddk_cksum.zc_word[1]); | |
1418 | DO64(drr_write.drr_key.ddk_cksum.zc_word[2]); | |
1419 | DO64(drr_write.drr_key.ddk_cksum.zc_word[3]); | |
1420 | DO64(drr_write.drr_key.ddk_prop); | |
1421 | break; | |
1422 | case DRR_WRITE_BYREF: | |
1423 | DO64(drr_write_byref.drr_object); | |
1424 | DO64(drr_write_byref.drr_offset); | |
1425 | DO64(drr_write_byref.drr_length); | |
1426 | DO64(drr_write_byref.drr_toguid); | |
1427 | DO64(drr_write_byref.drr_refguid); | |
1428 | DO64(drr_write_byref.drr_refobject); | |
1429 | DO64(drr_write_byref.drr_refoffset); | |
1430 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]); | |
1431 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]); | |
1432 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]); | |
1433 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]); | |
1434 | DO64(drr_write_byref.drr_key.ddk_prop); | |
34dc7c2f | 1435 | break; |
9b67f605 MA |
1436 | case DRR_WRITE_EMBEDDED: |
1437 | DO64(drr_write_embedded.drr_object); | |
1438 | DO64(drr_write_embedded.drr_offset); | |
1439 | DO64(drr_write_embedded.drr_length); | |
1440 | DO64(drr_write_embedded.drr_toguid); | |
1441 | DO32(drr_write_embedded.drr_lsize); | |
1442 | DO32(drr_write_embedded.drr_psize); | |
1443 | break; | |
34dc7c2f BB |
1444 | case DRR_FREE: |
1445 | DO64(drr_free.drr_object); | |
1446 | DO64(drr_free.drr_offset); | |
1447 | DO64(drr_free.drr_length); | |
428870ff BB |
1448 | DO64(drr_free.drr_toguid); |
1449 | break; | |
1450 | case DRR_SPILL: | |
1451 | DO64(drr_spill.drr_object); | |
1452 | DO64(drr_spill.drr_length); | |
1453 | DO64(drr_spill.drr_toguid); | |
34dc7c2f BB |
1454 | break; |
1455 | case DRR_END: | |
1456 | DO64(drr_end.drr_checksum.zc_word[0]); | |
1457 | DO64(drr_end.drr_checksum.zc_word[1]); | |
1458 | DO64(drr_end.drr_checksum.zc_word[2]); | |
1459 | DO64(drr_end.drr_checksum.zc_word[3]); | |
428870ff | 1460 | DO64(drr_end.drr_toguid); |
34dc7c2f | 1461 | break; |
e75c13c3 BB |
1462 | default: |
1463 | break; | |
34dc7c2f BB |
1464 | } |
1465 | #undef DO64 | |
1466 | #undef DO32 | |
1467 | } | |
1468 | ||
6c59307a MA |
1469 | static inline uint8_t |
1470 | deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) | |
1471 | { | |
1472 | if (bonus_type == DMU_OT_SA) { | |
1473 | return (1); | |
1474 | } else { | |
1475 | return (1 + | |
1476 | ((DN_MAX_BONUSLEN - bonus_size) >> SPA_BLKPTRSHIFT)); | |
1477 | } | |
1478 | } | |
1479 | ||
60948de1 | 1480 | noinline static int |
34dc7c2f BB |
1481 | restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) |
1482 | { | |
6c59307a | 1483 | dmu_object_info_t doi; |
34dc7c2f | 1484 | dmu_tx_t *tx; |
b128c09f | 1485 | void *data = NULL; |
6c59307a MA |
1486 | uint64_t object; |
1487 | int err; | |
34dc7c2f | 1488 | |
34dc7c2f | 1489 | if (drro->drr_type == DMU_OT_NONE || |
9ae529ec CS |
1490 | !DMU_OT_IS_VALID(drro->drr_type) || |
1491 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
428870ff | 1492 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || |
34dc7c2f BB |
1493 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || |
1494 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
1495 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
f1512ee6 | 1496 | drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(os)) || |
34dc7c2f | 1497 | drro->drr_bonuslen > DN_MAX_BONUSLEN) { |
2e528b49 | 1498 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1499 | } |
1500 | ||
6c59307a | 1501 | err = dmu_object_info(os, drro->drr_object, &doi); |
9babb374 BB |
1502 | |
1503 | if (err != 0 && err != ENOENT) | |
2e528b49 | 1504 | return (SET_ERROR(EINVAL)); |
6c59307a | 1505 | object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; |
9babb374 | 1506 | |
b128c09f | 1507 | if (drro->drr_bonuslen) { |
88904bb3 | 1508 | data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8), NULL); |
13fe0198 | 1509 | if (ra->err != 0) |
b128c09f BB |
1510 | return (ra->err); |
1511 | } | |
1512 | ||
6c59307a MA |
1513 | /* |
1514 | * If we are losing blkptrs or changing the block size this must | |
1515 | * be a new file instance. We must clear out the previous file | |
1516 | * contents before we can change this type of metadata in the dnode. | |
1517 | */ | |
1518 | if (err == 0) { | |
1519 | int nblkptr; | |
1520 | ||
1521 | nblkptr = deduce_nblkptr(drro->drr_bonustype, | |
1522 | drro->drr_bonuslen); | |
1523 | ||
1524 | if (drro->drr_blksz != doi.doi_data_block_size || | |
1525 | nblkptr < doi.doi_nblkptr) { | |
1526 | err = dmu_free_long_range(os, drro->drr_object, | |
1527 | 0, DMU_OBJECT_END); | |
1528 | if (err != 0) | |
1529 | return (SET_ERROR(EINVAL)); | |
34dc7c2f | 1530 | } |
6c59307a MA |
1531 | } |
1532 | ||
1533 | tx = dmu_tx_create(os); | |
1534 | dmu_tx_hold_bonus(tx, object); | |
1535 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1536 | if (err != 0) { | |
1537 | dmu_tx_abort(tx); | |
1538 | return (err); | |
1539 | } | |
1540 | ||
1541 | if (object == DMU_NEW_OBJECT) { | |
1542 | /* currently free, want to be allocated */ | |
34dc7c2f BB |
1543 | err = dmu_object_claim(os, drro->drr_object, |
1544 | drro->drr_type, drro->drr_blksz, | |
1545 | drro->drr_bonustype, drro->drr_bonuslen, tx); | |
6c59307a MA |
1546 | } else if (drro->drr_type != doi.doi_type || |
1547 | drro->drr_blksz != doi.doi_data_block_size || | |
1548 | drro->drr_bonustype != doi.doi_bonus_type || | |
1549 | drro->drr_bonuslen != doi.doi_bonus_size) { | |
1550 | /* currently allocated, but with different properties */ | |
34dc7c2f BB |
1551 | err = dmu_object_reclaim(os, drro->drr_object, |
1552 | drro->drr_type, drro->drr_blksz, | |
6c59307a | 1553 | drro->drr_bonustype, drro->drr_bonuslen, tx); |
34dc7c2f | 1554 | } |
13fe0198 | 1555 | if (err != 0) { |
6c59307a | 1556 | dmu_tx_commit(tx); |
2e528b49 | 1557 | return (SET_ERROR(EINVAL)); |
428870ff | 1558 | } |
9babb374 | 1559 | |
428870ff BB |
1560 | dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype, |
1561 | tx); | |
34dc7c2f BB |
1562 | dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx); |
1563 | ||
b128c09f | 1564 | if (data != NULL) { |
34dc7c2f | 1565 | dmu_buf_t *db; |
b128c09f | 1566 | |
34dc7c2f BB |
1567 | VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db)); |
1568 | dmu_buf_will_dirty(db, tx); | |
1569 | ||
1570 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
34dc7c2f BB |
1571 | bcopy(data, db->db_data, drro->drr_bonuslen); |
1572 | if (ra->byteswap) { | |
9ae529ec CS |
1573 | dmu_object_byteswap_t byteswap = |
1574 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
1575 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
34dc7c2f BB |
1576 | drro->drr_bonuslen); |
1577 | } | |
1578 | dmu_buf_rele(db, FTAG); | |
1579 | } | |
1580 | dmu_tx_commit(tx); | |
1581 | return (0); | |
1582 | } | |
1583 | ||
1584 | /* ARGSUSED */ | |
60948de1 | 1585 | noinline static int |
34dc7c2f BB |
1586 | restore_freeobjects(struct restorearg *ra, objset_t *os, |
1587 | struct drr_freeobjects *drrfo) | |
1588 | { | |
1589 | uint64_t obj; | |
1590 | ||
1591 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
2e528b49 | 1592 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1593 | |
1594 | for (obj = drrfo->drr_firstobj; | |
1595 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs; | |
1596 | (void) dmu_object_next(os, &obj, FALSE, 0)) { | |
34dc7c2f BB |
1597 | int err; |
1598 | ||
1599 | if (dmu_object_info(os, obj, NULL) != 0) | |
1600 | continue; | |
1601 | ||
b663a23d | 1602 | err = dmu_free_long_object(os, obj); |
13fe0198 | 1603 | if (err != 0) |
34dc7c2f | 1604 | return (err); |
34dc7c2f BB |
1605 | } |
1606 | return (0); | |
1607 | } | |
1608 | ||
60948de1 | 1609 | noinline static int |
34dc7c2f BB |
1610 | restore_write(struct restorearg *ra, objset_t *os, |
1611 | struct drr_write *drrw) | |
1612 | { | |
1613 | dmu_tx_t *tx; | |
88904bb3 MA |
1614 | dmu_buf_t *bonus; |
1615 | arc_buf_t *abuf; | |
34dc7c2f BB |
1616 | void *data; |
1617 | int err; | |
1618 | ||
1619 | if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || | |
9ae529ec | 1620 | !DMU_OT_IS_VALID(drrw->drr_type)) |
2e528b49 | 1621 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1622 | |
34dc7c2f | 1623 | if (dmu_object_info(os, drrw->drr_object, NULL) != 0) |
2e528b49 | 1624 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1625 | |
88904bb3 MA |
1626 | if (dmu_bonus_hold(os, drrw->drr_object, FTAG, &bonus) != 0) |
1627 | return (SET_ERROR(EINVAL)); | |
1628 | ||
1629 | abuf = dmu_request_arcbuf(bonus, drrw->drr_length); | |
1630 | ||
1631 | data = restore_read(ra, drrw->drr_length, abuf->b_data); | |
1632 | if (data == NULL) { | |
1633 | dmu_return_arcbuf(abuf); | |
1634 | dmu_buf_rele(bonus, FTAG); | |
1635 | return (ra->err); | |
1636 | } | |
1637 | ||
34dc7c2f BB |
1638 | tx = dmu_tx_create(os); |
1639 | ||
1640 | dmu_tx_hold_write(tx, drrw->drr_object, | |
1641 | drrw->drr_offset, drrw->drr_length); | |
1642 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1643 | if (err != 0) { |
88904bb3 MA |
1644 | dmu_return_arcbuf(abuf); |
1645 | dmu_buf_rele(bonus, FTAG); | |
34dc7c2f BB |
1646 | dmu_tx_abort(tx); |
1647 | return (err); | |
1648 | } | |
9ae529ec CS |
1649 | if (ra->byteswap) { |
1650 | dmu_object_byteswap_t byteswap = | |
1651 | DMU_OT_BYTESWAP(drrw->drr_type); | |
1652 | dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length); | |
1653 | } | |
88904bb3 | 1654 | dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); |
34dc7c2f | 1655 | dmu_tx_commit(tx); |
88904bb3 | 1656 | dmu_buf_rele(bonus, FTAG); |
34dc7c2f BB |
1657 | return (0); |
1658 | } | |
1659 | ||
428870ff BB |
1660 | /* |
1661 | * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed | |
1662 | * streams to refer to a copy of the data that is already on the | |
1663 | * system because it came in earlier in the stream. This function | |
1664 | * finds the earlier copy of the data, and uses that copy instead of | |
1665 | * data from the stream to fulfill this write. | |
1666 | */ | |
1667 | static int | |
1668 | restore_write_byref(struct restorearg *ra, objset_t *os, | |
1669 | struct drr_write_byref *drrwbr) | |
1670 | { | |
1671 | dmu_tx_t *tx; | |
1672 | int err; | |
1673 | guid_map_entry_t gmesrch; | |
1674 | guid_map_entry_t *gmep; | |
9b67f605 | 1675 | avl_index_t where; |
428870ff BB |
1676 | objset_t *ref_os = NULL; |
1677 | dmu_buf_t *dbp; | |
1678 | ||
1679 | if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) | |
2e528b49 | 1680 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1681 | |
1682 | /* | |
1683 | * If the GUID of the referenced dataset is different from the | |
1684 | * GUID of the target dataset, find the referenced dataset. | |
1685 | */ | |
1686 | if (drrwbr->drr_toguid != drrwbr->drr_refguid) { | |
1687 | gmesrch.guid = drrwbr->drr_refguid; | |
572e2857 | 1688 | if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch, |
428870ff | 1689 | &where)) == NULL) { |
2e528b49 | 1690 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1691 | } |
1692 | if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) | |
2e528b49 | 1693 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1694 | } else { |
1695 | ref_os = os; | |
1696 | } | |
1697 | ||
c65aa5b2 BB |
1698 | err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, |
1699 | drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); | |
9b67f605 | 1700 | if (err != 0) |
428870ff BB |
1701 | return (err); |
1702 | ||
1703 | tx = dmu_tx_create(os); | |
1704 | ||
1705 | dmu_tx_hold_write(tx, drrwbr->drr_object, | |
1706 | drrwbr->drr_offset, drrwbr->drr_length); | |
1707 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1708 | if (err != 0) { |
428870ff BB |
1709 | dmu_tx_abort(tx); |
1710 | return (err); | |
1711 | } | |
1712 | dmu_write(os, drrwbr->drr_object, | |
1713 | drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); | |
1714 | dmu_buf_rele(dbp, FTAG); | |
1715 | dmu_tx_commit(tx); | |
1716 | return (0); | |
1717 | } | |
1718 | ||
9b67f605 MA |
1719 | static int |
1720 | restore_write_embedded(struct restorearg *ra, objset_t *os, | |
1721 | struct drr_write_embedded *drrwnp) | |
1722 | { | |
1723 | dmu_tx_t *tx; | |
1724 | int err; | |
1725 | void *data; | |
1726 | ||
1727 | if (drrwnp->drr_offset + drrwnp->drr_length < drrwnp->drr_offset) | |
1728 | return (EINVAL); | |
1729 | ||
1730 | if (drrwnp->drr_psize > BPE_PAYLOAD_SIZE) | |
1731 | return (EINVAL); | |
1732 | ||
1733 | if (drrwnp->drr_etype >= NUM_BP_EMBEDDED_TYPES) | |
1734 | return (EINVAL); | |
1735 | if (drrwnp->drr_compression >= ZIO_COMPRESS_FUNCTIONS) | |
1736 | return (EINVAL); | |
1737 | ||
88904bb3 | 1738 | data = restore_read(ra, P2ROUNDUP(drrwnp->drr_psize, 8), NULL); |
9b67f605 MA |
1739 | if (data == NULL) |
1740 | return (ra->err); | |
1741 | ||
1742 | tx = dmu_tx_create(os); | |
1743 | ||
1744 | dmu_tx_hold_write(tx, drrwnp->drr_object, | |
1745 | drrwnp->drr_offset, drrwnp->drr_length); | |
1746 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1747 | if (err != 0) { | |
1748 | dmu_tx_abort(tx); | |
1749 | return (err); | |
1750 | } | |
1751 | ||
1752 | dmu_write_embedded(os, drrwnp->drr_object, | |
1753 | drrwnp->drr_offset, data, drrwnp->drr_etype, | |
1754 | drrwnp->drr_compression, drrwnp->drr_lsize, drrwnp->drr_psize, | |
1755 | ra->byteswap ^ ZFS_HOST_BYTEORDER, tx); | |
1756 | ||
1757 | dmu_tx_commit(tx); | |
1758 | return (0); | |
1759 | } | |
1760 | ||
428870ff BB |
1761 | static int |
1762 | restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs) | |
1763 | { | |
1764 | dmu_tx_t *tx; | |
1765 | void *data; | |
1766 | dmu_buf_t *db, *db_spill; | |
1767 | int err; | |
1768 | ||
1769 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
f1512ee6 | 1770 | drrs->drr_length > spa_maxblocksize(dmu_objset_spa(os))) |
2e528b49 | 1771 | return (SET_ERROR(EINVAL)); |
428870ff | 1772 | |
88904bb3 | 1773 | data = restore_read(ra, drrs->drr_length, NULL); |
428870ff BB |
1774 | if (data == NULL) |
1775 | return (ra->err); | |
1776 | ||
1777 | if (dmu_object_info(os, drrs->drr_object, NULL) != 0) | |
2e528b49 | 1778 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1779 | |
1780 | VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db)); | |
1781 | if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { | |
1782 | dmu_buf_rele(db, FTAG); | |
1783 | return (err); | |
1784 | } | |
1785 | ||
1786 | tx = dmu_tx_create(os); | |
1787 | ||
1788 | dmu_tx_hold_spill(tx, db->db_object); | |
1789 | ||
1790 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1791 | if (err != 0) { |
428870ff BB |
1792 | dmu_buf_rele(db, FTAG); |
1793 | dmu_buf_rele(db_spill, FTAG); | |
1794 | dmu_tx_abort(tx); | |
1795 | return (err); | |
1796 | } | |
1797 | dmu_buf_will_dirty(db_spill, tx); | |
1798 | ||
1799 | if (db_spill->db_size < drrs->drr_length) | |
1800 | VERIFY(0 == dbuf_spill_set_blksz(db_spill, | |
1801 | drrs->drr_length, tx)); | |
1802 | bcopy(data, db_spill->db_data, drrs->drr_length); | |
1803 | ||
1804 | dmu_buf_rele(db, FTAG); | |
1805 | dmu_buf_rele(db_spill, FTAG); | |
1806 | ||
1807 | dmu_tx_commit(tx); | |
1808 | return (0); | |
1809 | } | |
1810 | ||
34dc7c2f | 1811 | /* ARGSUSED */ |
60948de1 | 1812 | noinline static int |
34dc7c2f BB |
1813 | restore_free(struct restorearg *ra, objset_t *os, |
1814 | struct drr_free *drrf) | |
1815 | { | |
34dc7c2f BB |
1816 | int err; |
1817 | ||
1818 | if (drrf->drr_length != -1ULL && | |
1819 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) | |
2e528b49 | 1820 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1821 | |
1822 | if (dmu_object_info(os, drrf->drr_object, NULL) != 0) | |
2e528b49 | 1823 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1824 | |
b128c09f | 1825 | err = dmu_free_long_range(os, drrf->drr_object, |
34dc7c2f | 1826 | drrf->drr_offset, drrf->drr_length); |
34dc7c2f BB |
1827 | return (err); |
1828 | } | |
1829 | ||
13fe0198 MA |
1830 | /* used to destroy the drc_ds on error */ |
1831 | static void | |
1832 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
1833 | { | |
1834 | char name[MAXNAMELEN]; | |
1835 | dsl_dataset_name(drc->drc_ds, name); | |
1836 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1837 | (void) dsl_destroy_head(name); | |
1838 | } | |
1839 | ||
34dc7c2f BB |
1840 | /* |
1841 | * NB: callers *must* call dmu_recv_end() if this succeeds. | |
1842 | */ | |
1843 | int | |
572e2857 BB |
1844 | dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, |
1845 | int cleanup_fd, uint64_t *action_handlep) | |
34dc7c2f BB |
1846 | { |
1847 | struct restorearg ra = { 0 }; | |
1848 | dmu_replay_record_t *drr; | |
1849 | objset_t *os; | |
1850 | zio_cksum_t pcksum; | |
428870ff | 1851 | int featureflags; |
34dc7c2f | 1852 | |
13fe0198 MA |
1853 | ra.byteswap = drc->drc_byteswap; |
1854 | ra.cksum = drc->drc_cksum; | |
34dc7c2f BB |
1855 | ra.vp = vp; |
1856 | ra.voff = *voffp; | |
f1512ee6 | 1857 | ra.bufsize = SPA_MAXBLOCKSIZE; |
00b46022 | 1858 | ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP); |
34dc7c2f BB |
1859 | |
1860 | /* these were verified in dmu_recv_begin */ | |
13fe0198 | 1861 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, |
428870ff | 1862 | DMU_SUBSTREAM); |
13fe0198 | 1863 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); |
34dc7c2f BB |
1864 | |
1865 | /* | |
1866 | * Open the objset we are modifying. | |
1867 | */ | |
13fe0198 | 1868 | VERIFY0(dmu_objset_from_ds(drc->drc_ds, &os)); |
34dc7c2f | 1869 | |
d683ddbb | 1870 | ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); |
34dc7c2f | 1871 | |
428870ff BB |
1872 | featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); |
1873 | ||
1874 | /* if this stream is dedup'ed, set up the avl tree for guid mapping */ | |
1875 | if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { | |
572e2857 BB |
1876 | minor_t minor; |
1877 | ||
1878 | if (cleanup_fd == -1) { | |
2e528b49 | 1879 | ra.err = SET_ERROR(EBADF); |
572e2857 BB |
1880 | goto out; |
1881 | } | |
1882 | ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); | |
13fe0198 | 1883 | if (ra.err != 0) { |
572e2857 BB |
1884 | cleanup_fd = -1; |
1885 | goto out; | |
1886 | } | |
1887 | ||
1888 | if (*action_handlep == 0) { | |
1889 | ra.guid_to_ds_map = | |
1890 | kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); | |
1891 | avl_create(ra.guid_to_ds_map, guid_compare, | |
1892 | sizeof (guid_map_entry_t), | |
1893 | offsetof(guid_map_entry_t, avlnode)); | |
572e2857 BB |
1894 | ra.err = zfs_onexit_add_cb(minor, |
1895 | free_guid_map_onexit, ra.guid_to_ds_map, | |
1896 | action_handlep); | |
13fe0198 | 1897 | if (ra.err != 0) |
572e2857 BB |
1898 | goto out; |
1899 | } else { | |
1900 | ra.err = zfs_onexit_cb_data(minor, *action_handlep, | |
1901 | (void **)&ra.guid_to_ds_map); | |
13fe0198 | 1902 | if (ra.err != 0) |
572e2857 BB |
1903 | goto out; |
1904 | } | |
8d35c149 AS |
1905 | |
1906 | drc->drc_guid_to_ds_map = ra.guid_to_ds_map; | |
428870ff BB |
1907 | } |
1908 | ||
34dc7c2f BB |
1909 | /* |
1910 | * Read records and process them. | |
1911 | */ | |
1912 | pcksum = ra.cksum; | |
1913 | while (ra.err == 0 && | |
88904bb3 | 1914 | NULL != (drr = restore_read(&ra, sizeof (*drr), NULL))) { |
34dc7c2f | 1915 | if (issig(JUSTLOOKING) && issig(FORREAL)) { |
2e528b49 | 1916 | ra.err = SET_ERROR(EINTR); |
34dc7c2f BB |
1917 | goto out; |
1918 | } | |
1919 | ||
1920 | if (ra.byteswap) | |
1921 | backup_byteswap(drr); | |
1922 | ||
1923 | switch (drr->drr_type) { | |
1924 | case DRR_OBJECT: | |
1925 | { | |
1926 | /* | |
1927 | * We need to make a copy of the record header, | |
1928 | * because restore_{object,write} may need to | |
1929 | * restore_read(), which will invalidate drr. | |
1930 | */ | |
1931 | struct drr_object drro = drr->drr_u.drr_object; | |
1932 | ra.err = restore_object(&ra, os, &drro); | |
1933 | break; | |
1934 | } | |
1935 | case DRR_FREEOBJECTS: | |
1936 | { | |
1937 | struct drr_freeobjects drrfo = | |
1938 | drr->drr_u.drr_freeobjects; | |
1939 | ra.err = restore_freeobjects(&ra, os, &drrfo); | |
1940 | break; | |
1941 | } | |
1942 | case DRR_WRITE: | |
1943 | { | |
1944 | struct drr_write drrw = drr->drr_u.drr_write; | |
1945 | ra.err = restore_write(&ra, os, &drrw); | |
1946 | break; | |
1947 | } | |
428870ff BB |
1948 | case DRR_WRITE_BYREF: |
1949 | { | |
1950 | struct drr_write_byref drrwbr = | |
1951 | drr->drr_u.drr_write_byref; | |
1952 | ra.err = restore_write_byref(&ra, os, &drrwbr); | |
1953 | break; | |
1954 | } | |
9b67f605 MA |
1955 | case DRR_WRITE_EMBEDDED: |
1956 | { | |
1957 | struct drr_write_embedded drrwe = | |
1958 | drr->drr_u.drr_write_embedded; | |
1959 | ra.err = restore_write_embedded(&ra, os, &drrwe); | |
1960 | break; | |
1961 | } | |
34dc7c2f BB |
1962 | case DRR_FREE: |
1963 | { | |
1964 | struct drr_free drrf = drr->drr_u.drr_free; | |
1965 | ra.err = restore_free(&ra, os, &drrf); | |
1966 | break; | |
1967 | } | |
1968 | case DRR_END: | |
1969 | { | |
1970 | struct drr_end drre = drr->drr_u.drr_end; | |
1971 | /* | |
1972 | * We compare against the *previous* checksum | |
1973 | * value, because the stored checksum is of | |
1974 | * everything before the DRR_END record. | |
1975 | */ | |
1976 | if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum)) | |
2e528b49 | 1977 | ra.err = SET_ERROR(ECKSUM); |
34dc7c2f BB |
1978 | goto out; |
1979 | } | |
428870ff BB |
1980 | case DRR_SPILL: |
1981 | { | |
1982 | struct drr_spill drrs = drr->drr_u.drr_spill; | |
1983 | ra.err = restore_spill(&ra, os, &drrs); | |
1984 | break; | |
1985 | } | |
34dc7c2f | 1986 | default: |
2e528b49 | 1987 | ra.err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1988 | goto out; |
1989 | } | |
1990 | pcksum = ra.cksum; | |
1991 | } | |
1992 | ASSERT(ra.err != 0); | |
1993 | ||
1994 | out: | |
572e2857 BB |
1995 | if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) |
1996 | zfs_onexit_fd_rele(cleanup_fd); | |
1997 | ||
34dc7c2f BB |
1998 | if (ra.err != 0) { |
1999 | /* | |
45d1cae3 BB |
2000 | * destroy what we created, so we don't leave it in the |
2001 | * inconsistent restoring state. | |
34dc7c2f | 2002 | */ |
13fe0198 | 2003 | dmu_recv_cleanup_ds(drc); |
34dc7c2f BB |
2004 | } |
2005 | ||
00b46022 | 2006 | vmem_free(ra.buf, ra.bufsize); |
34dc7c2f BB |
2007 | *voffp = ra.voff; |
2008 | return (ra.err); | |
2009 | } | |
2010 | ||
34dc7c2f | 2011 | static int |
13fe0198 | 2012 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2013 | { |
13fe0198 MA |
2014 | dmu_recv_cookie_t *drc = arg; |
2015 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2016 | int error; | |
2017 | ||
2018 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
2019 | ||
2020 | if (!drc->drc_newfs) { | |
2021 | dsl_dataset_t *origin_head; | |
2022 | ||
2023 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
2024 | if (error != 0) | |
2025 | return (error); | |
19580676 MA |
2026 | if (drc->drc_force) { |
2027 | /* | |
2028 | * We will destroy any snapshots in tofs (i.e. before | |
2029 | * origin_head) that are after the origin (which is | |
2030 | * the snap before drc_ds, because drc_ds can not | |
2031 | * have any snaps of its own). | |
2032 | */ | |
d683ddbb JG |
2033 | uint64_t obj; |
2034 | ||
2035 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
2036 | while (obj != | |
2037 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
19580676 MA |
2038 | dsl_dataset_t *snap; |
2039 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
2040 | &snap); | |
2041 | if (error != 0) | |
b6640117 | 2042 | break; |
19580676 MA |
2043 | if (snap->ds_dir != origin_head->ds_dir) |
2044 | error = SET_ERROR(EINVAL); | |
2045 | if (error == 0) { | |
2046 | error = dsl_destroy_snapshot_check_impl( | |
2047 | snap, B_FALSE); | |
2048 | } | |
d683ddbb | 2049 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
2050 | dsl_dataset_rele(snap, FTAG); |
2051 | if (error != 0) | |
b6640117 AG |
2052 | break; |
2053 | } | |
2054 | if (error != 0) { | |
2055 | dsl_dataset_rele(origin_head, FTAG); | |
2056 | return (error); | |
19580676 MA |
2057 | } |
2058 | } | |
13fe0198 | 2059 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, |
831baf06 | 2060 | origin_head, drc->drc_force, drc->drc_owner, tx); |
13fe0198 MA |
2061 | if (error != 0) { |
2062 | dsl_dataset_rele(origin_head, FTAG); | |
2063 | return (error); | |
2064 | } | |
2065 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
788eb90c | 2066 | drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); |
13fe0198 MA |
2067 | dsl_dataset_rele(origin_head, FTAG); |
2068 | if (error != 0) | |
2069 | return (error); | |
34dc7c2f | 2070 | |
13fe0198 MA |
2071 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); |
2072 | } else { | |
2073 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
788eb90c | 2074 | drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); |
13fe0198 MA |
2075 | } |
2076 | return (error); | |
34dc7c2f BB |
2077 | } |
2078 | ||
2079 | static void | |
13fe0198 | 2080 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2081 | { |
13fe0198 MA |
2082 | dmu_recv_cookie_t *drc = arg; |
2083 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2084 | ||
2085 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
2086 | tx, "snap=%s", drc->drc_tosnap); | |
2087 | ||
2088 | if (!drc->drc_newfs) { | |
2089 | dsl_dataset_t *origin_head; | |
2090 | ||
2091 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
2092 | &origin_head)); | |
19580676 MA |
2093 | |
2094 | if (drc->drc_force) { | |
2095 | /* | |
2096 | * Destroy any snapshots of drc_tofs (origin_head) | |
2097 | * after the origin (the snap before drc_ds). | |
2098 | */ | |
d683ddbb JG |
2099 | uint64_t obj; |
2100 | ||
2101 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
2102 | while (obj != | |
2103 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
19580676 MA |
2104 | dsl_dataset_t *snap; |
2105 | VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, | |
2106 | &snap)); | |
2107 | ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); | |
d683ddbb | 2108 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
2109 | dsl_destroy_snapshot_sync_impl(snap, |
2110 | B_FALSE, tx); | |
2111 | dsl_dataset_rele(snap, FTAG); | |
2112 | } | |
2113 | } | |
2114 | VERIFY3P(drc->drc_ds->ds_prev, ==, | |
2115 | origin_head->ds_prev); | |
2116 | ||
13fe0198 MA |
2117 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, |
2118 | origin_head, tx); | |
2119 | dsl_dataset_snapshot_sync_impl(origin_head, | |
2120 | drc->drc_tosnap, tx); | |
2121 | ||
2122 | /* set snapshot's creation time and guid */ | |
2123 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
d683ddbb | 2124 | dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = |
13fe0198 | 2125 | drc->drc_drrb->drr_creation_time; |
d683ddbb | 2126 | dsl_dataset_phys(origin_head->ds_prev)->ds_guid = |
13fe0198 | 2127 | drc->drc_drrb->drr_toguid; |
d683ddbb | 2128 | dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= |
13fe0198 MA |
2129 | ~DS_FLAG_INCONSISTENT; |
2130 | ||
2131 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
d683ddbb JG |
2132 | dsl_dataset_phys(origin_head)->ds_flags &= |
2133 | ~DS_FLAG_INCONSISTENT; | |
13fe0198 MA |
2134 | |
2135 | dsl_dataset_rele(origin_head, FTAG); | |
2136 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
831baf06 KW |
2137 | |
2138 | if (drc->drc_owner != NULL) | |
2139 | VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); | |
13fe0198 MA |
2140 | } else { |
2141 | dsl_dataset_t *ds = drc->drc_ds; | |
34dc7c2f | 2142 | |
13fe0198 | 2143 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); |
34dc7c2f | 2144 | |
13fe0198 MA |
2145 | /* set snapshot's creation time and guid */ |
2146 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
d683ddbb | 2147 | dsl_dataset_phys(ds->ds_prev)->ds_creation_time = |
13fe0198 | 2148 | drc->drc_drrb->drr_creation_time; |
d683ddbb JG |
2149 | dsl_dataset_phys(ds->ds_prev)->ds_guid = |
2150 | drc->drc_drrb->drr_toguid; | |
2151 | dsl_dataset_phys(ds->ds_prev)->ds_flags &= | |
2152 | ~DS_FLAG_INCONSISTENT; | |
34dc7c2f | 2153 | |
13fe0198 | 2154 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb | 2155 | dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; |
13fe0198 | 2156 | } |
d683ddbb | 2157 | drc->drc_newsnapobj = dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; |
13fe0198 MA |
2158 | /* |
2159 | * Release the hold from dmu_recv_begin. This must be done before | |
2160 | * we return to open context, so that when we free the dataset's dnode, | |
2161 | * we can evict its bonus buffer. | |
2162 | */ | |
2163 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
2164 | drc->drc_ds = NULL; | |
34dc7c2f BB |
2165 | } |
2166 | ||
8d35c149 | 2167 | static int |
13fe0198 | 2168 | add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) |
8d35c149 | 2169 | { |
13fe0198 | 2170 | dsl_pool_t *dp; |
8d35c149 AS |
2171 | dsl_dataset_t *snapds; |
2172 | guid_map_entry_t *gmep; | |
2173 | int err; | |
2174 | ||
2175 | ASSERT(guid_map != NULL); | |
2176 | ||
13fe0198 MA |
2177 | err = dsl_pool_hold(name, FTAG, &dp); |
2178 | if (err != 0) | |
2179 | return (err); | |
7ec09286 MA |
2180 | gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); |
2181 | err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); | |
8d35c149 | 2182 | if (err == 0) { |
d683ddbb | 2183 | gmep->guid = dsl_dataset_phys(snapds)->ds_guid; |
8d35c149 AS |
2184 | gmep->gme_ds = snapds; |
2185 | avl_add(guid_map, gmep); | |
13fe0198 | 2186 | dsl_dataset_long_hold(snapds, gmep); |
7ec09286 MA |
2187 | } else { |
2188 | kmem_free(gmep, sizeof (*gmep)); | |
8d35c149 AS |
2189 | } |
2190 | ||
13fe0198 | 2191 | dsl_pool_rele(dp, FTAG); |
8d35c149 AS |
2192 | return (err); |
2193 | } | |
2194 | ||
13fe0198 MA |
2195 | static int dmu_recv_end_modified_blocks = 3; |
2196 | ||
428870ff BB |
2197 | static int |
2198 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
34dc7c2f | 2199 | { |
13fe0198 | 2200 | int error; |
34dc7c2f | 2201 | |
13fe0198 MA |
2202 | #ifdef _KERNEL |
2203 | char *name; | |
34dc7c2f | 2204 | |
13fe0198 MA |
2205 | /* |
2206 | * We will be destroying the ds; make sure its origin is unmounted if | |
2207 | * necessary. | |
2208 | */ | |
2209 | name = kmem_alloc(MAXNAMELEN, KM_SLEEP); | |
2210 | dsl_dataset_name(drc->drc_ds, name); | |
2211 | zfs_destroy_unmount_origin(name); | |
2212 | kmem_free(name, MAXNAMELEN); | |
2213 | #endif | |
34dc7c2f | 2214 | |
13fe0198 MA |
2215 | error = dsl_sync_task(drc->drc_tofs, |
2216 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3d45fdd6 | 2217 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
2218 | |
2219 | if (error != 0) | |
2220 | dmu_recv_cleanup_ds(drc); | |
2221 | return (error); | |
34dc7c2f | 2222 | } |
428870ff BB |
2223 | |
2224 | static int | |
2225 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
2226 | { | |
13fe0198 | 2227 | int error; |
428870ff | 2228 | |
13fe0198 MA |
2229 | error = dsl_sync_task(drc->drc_tofs, |
2230 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3d45fdd6 | 2231 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); |
428870ff | 2232 | |
13fe0198 MA |
2233 | if (error != 0) { |
2234 | dmu_recv_cleanup_ds(drc); | |
2235 | } else if (drc->drc_guid_to_ds_map != NULL) { | |
2236 | (void) add_ds_to_guidmap(drc->drc_tofs, | |
2237 | drc->drc_guid_to_ds_map, | |
2238 | drc->drc_newsnapobj); | |
428870ff | 2239 | } |
13fe0198 | 2240 | return (error); |
428870ff BB |
2241 | } |
2242 | ||
2243 | int | |
831baf06 | 2244 | dmu_recv_end(dmu_recv_cookie_t *drc, void *owner) |
428870ff | 2245 | { |
831baf06 KW |
2246 | drc->drc_owner = owner; |
2247 | ||
13fe0198 | 2248 | if (drc->drc_newfs) |
428870ff | 2249 | return (dmu_recv_new_end(drc)); |
13fe0198 MA |
2250 | else |
2251 | return (dmu_recv_existing_end(drc)); | |
428870ff | 2252 | } |
ea97f8ce MA |
2253 | |
2254 | /* | |
2255 | * Return TRUE if this objset is currently being received into. | |
2256 | */ | |
2257 | boolean_t | |
2258 | dmu_objset_is_receiving(objset_t *os) | |
2259 | { | |
2260 | return (os->os_dsl_dataset != NULL && | |
2261 | os->os_dsl_dataset->ds_owner == dmu_recv_tag); | |
2262 | } | |
fd8febbd TF |
2263 | |
2264 | #if defined(_KERNEL) | |
2265 | module_param(zfs_send_corrupt_data, int, 0644); | |
2266 | MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data"); | |
2267 | #endif |