]>
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. |
330d06f9 | 23 | * Copyright (c) 2011 by Delphix. All rights reserved. |
8d35c149 | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
37abac6d | 25 | * Copyright (c) 2012, Joyent, Inc. All rights reserved. |
2e528b49 | 26 | * Copyright (c) 2013 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; |
9b67f605 MA |
237 | if (BP_IS_EMBEDDED(bp)) { |
238 | /* | |
239 | * There's no pre-computed checksum of embedded BP's, so | |
240 | * (like fletcher4-checkummed blocks) userland will have | |
241 | * to compute a dedup-capable checksum itself. | |
242 | */ | |
243 | drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; | |
244 | } else { | |
245 | drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); | |
246 | if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup) | |
247 | drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; | |
248 | DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); | |
249 | DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); | |
250 | DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); | |
251 | drrw->drr_key.ddk_cksum = bp->blk_cksum; | |
252 | } | |
428870ff | 253 | |
37abac6d | 254 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 255 | return (SET_ERROR(EINTR)); |
37abac6d | 256 | if (dump_bytes(dsp, data, blksz) != 0) |
2e528b49 | 257 | return (SET_ERROR(EINTR)); |
428870ff BB |
258 | return (0); |
259 | } | |
260 | ||
9b67f605 MA |
261 | static int |
262 | dump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, | |
263 | int blksz, const blkptr_t *bp) | |
264 | { | |
265 | char buf[BPE_PAYLOAD_SIZE]; | |
266 | struct drr_write_embedded *drrw = | |
267 | &(dsp->dsa_drr->drr_u.drr_write_embedded); | |
268 | ||
269 | if (dsp->dsa_pending_op != PENDING_NONE) { | |
270 | if (dump_bytes(dsp, dsp->dsa_drr, | |
271 | sizeof (dmu_replay_record_t)) != 0) | |
272 | return (EINTR); | |
273 | dsp->dsa_pending_op = PENDING_NONE; | |
274 | } | |
275 | ||
276 | ASSERT(BP_IS_EMBEDDED(bp)); | |
277 | ||
278 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); | |
279 | dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; | |
280 | drrw->drr_object = object; | |
281 | drrw->drr_offset = offset; | |
282 | drrw->drr_length = blksz; | |
283 | drrw->drr_toguid = dsp->dsa_toguid; | |
284 | drrw->drr_compression = BP_GET_COMPRESS(bp); | |
285 | drrw->drr_etype = BPE_GET_ETYPE(bp); | |
286 | drrw->drr_lsize = BPE_GET_LSIZE(bp); | |
287 | drrw->drr_psize = BPE_GET_PSIZE(bp); | |
288 | ||
289 | decode_embedded_bp_compressed(bp, buf); | |
290 | ||
291 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) | |
292 | return (EINTR); | |
293 | if (dump_bytes(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) | |
294 | return (EINTR); | |
295 | return (0); | |
296 | } | |
297 | ||
428870ff | 298 | static int |
37abac6d | 299 | dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) |
428870ff | 300 | { |
37abac6d | 301 | struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); |
428870ff | 302 | |
37abac6d BP |
303 | if (dsp->dsa_pending_op != PENDING_NONE) { |
304 | if (dump_bytes(dsp, dsp->dsa_drr, | |
305 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 306 | return (SET_ERROR(EINTR)); |
37abac6d | 307 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
308 | } |
309 | ||
310 | /* write a SPILL record */ | |
37abac6d BP |
311 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
312 | dsp->dsa_drr->drr_type = DRR_SPILL; | |
428870ff BB |
313 | drrs->drr_object = object; |
314 | drrs->drr_length = blksz; | |
37abac6d | 315 | drrs->drr_toguid = dsp->dsa_toguid; |
34dc7c2f | 316 | |
37abac6d | 317 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t))) |
2e528b49 | 318 | return (SET_ERROR(EINTR)); |
37abac6d | 319 | if (dump_bytes(dsp, data, blksz)) |
2e528b49 | 320 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
321 | return (0); |
322 | } | |
323 | ||
324 | static int | |
37abac6d | 325 | dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) |
34dc7c2f | 326 | { |
37abac6d | 327 | struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); |
428870ff | 328 | |
ea97f8ce MA |
329 | /* See comment in dump_free(). */ |
330 | if (!dsp->dsa_incremental) | |
331 | return (0); | |
332 | ||
428870ff BB |
333 | /* |
334 | * If there is a pending op, but it's not PENDING_FREEOBJECTS, | |
335 | * push it out, since free block aggregation can only be done for | |
336 | * blocks of the same type (i.e., DRR_FREE records can only be | |
337 | * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records | |
338 | * can only be aggregated with other DRR_FREEOBJECTS records. | |
339 | */ | |
37abac6d BP |
340 | if (dsp->dsa_pending_op != PENDING_NONE && |
341 | dsp->dsa_pending_op != PENDING_FREEOBJECTS) { | |
342 | if (dump_bytes(dsp, dsp->dsa_drr, | |
343 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 344 | return (SET_ERROR(EINTR)); |
37abac6d | 345 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 346 | } |
37abac6d | 347 | if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { |
428870ff BB |
348 | /* |
349 | * See whether this free object array can be aggregated | |
350 | * with pending one | |
351 | */ | |
352 | if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { | |
353 | drrfo->drr_numobjs += numobjs; | |
354 | return (0); | |
355 | } else { | |
356 | /* can't be aggregated. Push out pending record */ | |
37abac6d | 357 | if (dump_bytes(dsp, dsp->dsa_drr, |
428870ff | 358 | sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 359 | return (SET_ERROR(EINTR)); |
37abac6d | 360 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
361 | } |
362 | } | |
363 | ||
34dc7c2f | 364 | /* write a FREEOBJECTS record */ |
37abac6d BP |
365 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
366 | dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; | |
428870ff BB |
367 | drrfo->drr_firstobj = firstobj; |
368 | drrfo->drr_numobjs = numobjs; | |
37abac6d | 369 | drrfo->drr_toguid = dsp->dsa_toguid; |
428870ff | 370 | |
37abac6d | 371 | dsp->dsa_pending_op = PENDING_FREEOBJECTS; |
34dc7c2f | 372 | |
34dc7c2f BB |
373 | return (0); |
374 | } | |
375 | ||
376 | static int | |
37abac6d | 377 | dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) |
34dc7c2f | 378 | { |
37abac6d | 379 | struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); |
428870ff | 380 | |
34dc7c2f | 381 | if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) |
37abac6d | 382 | return (dump_freeobjects(dsp, object, 1)); |
34dc7c2f | 383 | |
37abac6d BP |
384 | if (dsp->dsa_pending_op != PENDING_NONE) { |
385 | if (dump_bytes(dsp, dsp->dsa_drr, | |
386 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 387 | return (SET_ERROR(EINTR)); |
37abac6d | 388 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
389 | } |
390 | ||
34dc7c2f | 391 | /* write an OBJECT record */ |
37abac6d BP |
392 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
393 | dsp->dsa_drr->drr_type = DRR_OBJECT; | |
428870ff BB |
394 | drro->drr_object = object; |
395 | drro->drr_type = dnp->dn_type; | |
396 | drro->drr_bonustype = dnp->dn_bonustype; | |
397 | drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
398 | drro->drr_bonuslen = dnp->dn_bonuslen; | |
399 | drro->drr_checksumtype = dnp->dn_checksum; | |
400 | drro->drr_compress = dnp->dn_compress; | |
37abac6d | 401 | drro->drr_toguid = dsp->dsa_toguid; |
428870ff | 402 | |
37abac6d | 403 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 404 | return (SET_ERROR(EINTR)); |
34dc7c2f | 405 | |
37abac6d | 406 | if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) |
2e528b49 | 407 | return (SET_ERROR(EINTR)); |
34dc7c2f | 408 | |
ea97f8ce | 409 | /* Free anything past the end of the file. */ |
37abac6d | 410 | if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * |
ea97f8ce | 411 | (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) |
2e528b49 | 412 | return (SET_ERROR(EINTR)); |
13fe0198 | 413 | if (dsp->dsa_err != 0) |
2e528b49 | 414 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
415 | return (0); |
416 | } | |
417 | ||
9b67f605 MA |
418 | static boolean_t |
419 | backup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) | |
420 | { | |
421 | if (!BP_IS_EMBEDDED(bp)) | |
422 | return (B_FALSE); | |
423 | ||
424 | /* | |
425 | * Compression function must be legacy, or explicitly enabled. | |
426 | */ | |
427 | if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && | |
428 | !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4))) | |
429 | return (B_FALSE); | |
430 | ||
431 | /* | |
432 | * Embed type must be explicitly enabled. | |
433 | */ | |
434 | switch (BPE_GET_ETYPE(bp)) { | |
435 | case BP_EMBEDDED_TYPE_DATA: | |
436 | if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) | |
437 | return (B_TRUE); | |
438 | break; | |
439 | default: | |
440 | return (B_FALSE); | |
441 | } | |
442 | return (B_FALSE); | |
443 | } | |
444 | ||
34dc7c2f BB |
445 | #define BP_SPAN(dnp, level) \ |
446 | (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \ | |
447 | (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) | |
448 | ||
428870ff | 449 | /* ARGSUSED */ |
34dc7c2f | 450 | static int |
294f6806 | 451 | backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, |
428870ff | 452 | const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) |
34dc7c2f | 453 | { |
37abac6d | 454 | dmu_sendarg_t *dsp = arg; |
34dc7c2f | 455 | dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; |
34dc7c2f BB |
456 | int err = 0; |
457 | ||
458 | if (issig(JUSTLOOKING) && issig(FORREAL)) | |
2e528b49 | 459 | return (SET_ERROR(EINTR)); |
34dc7c2f | 460 | |
428870ff BB |
461 | if (zb->zb_object != DMU_META_DNODE_OBJECT && |
462 | DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { | |
9babb374 | 463 | return (0); |
da536844 MA |
464 | } else if (zb->zb_level == ZB_ZIL_LEVEL) { |
465 | /* | |
466 | * If we are sending a non-snapshot (which is allowed on | |
467 | * read-only pools), it may have a ZIL, which must be ignored. | |
468 | */ | |
469 | return (0); | |
b0bc7a84 MG |
470 | } else if (BP_IS_HOLE(bp) && |
471 | zb->zb_object == DMU_META_DNODE_OBJECT) { | |
b128c09f BB |
472 | uint64_t span = BP_SPAN(dnp, zb->zb_level); |
473 | uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; | |
37abac6d | 474 | err = dump_freeobjects(dsp, dnobj, span >> DNODE_SHIFT); |
b0bc7a84 | 475 | } else if (BP_IS_HOLE(bp)) { |
b128c09f | 476 | uint64_t span = BP_SPAN(dnp, zb->zb_level); |
37abac6d | 477 | err = dump_free(dsp, zb->zb_object, zb->zb_blkid * span, span); |
b128c09f BB |
478 | } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { |
479 | return (0); | |
480 | } else if (type == DMU_OT_DNODE) { | |
481 | dnode_phys_t *blk; | |
34dc7c2f BB |
482 | int i; |
483 | int blksz = BP_GET_LSIZE(bp); | |
b128c09f BB |
484 | uint32_t aflags = ARC_WAIT; |
485 | arc_buf_t *abuf; | |
486 | ||
294f6806 GW |
487 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
488 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
489 | &aflags, zb) != 0) | |
2e528b49 | 490 | return (SET_ERROR(EIO)); |
34dc7c2f | 491 | |
b128c09f | 492 | blk = abuf->b_data; |
34dc7c2f | 493 | for (i = 0; i < blksz >> DNODE_SHIFT; i++) { |
b128c09f BB |
494 | uint64_t dnobj = (zb->zb_blkid << |
495 | (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i; | |
37abac6d | 496 | err = dump_dnode(dsp, dnobj, blk+i); |
13fe0198 | 497 | if (err != 0) |
34dc7c2f BB |
498 | break; |
499 | } | |
b128c09f | 500 | (void) arc_buf_remove_ref(abuf, &abuf); |
428870ff | 501 | } else if (type == DMU_OT_SA) { |
b128c09f BB |
502 | uint32_t aflags = ARC_WAIT; |
503 | arc_buf_t *abuf; | |
34dc7c2f | 504 | int blksz = BP_GET_LSIZE(bp); |
b128c09f | 505 | |
294f6806 GW |
506 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
507 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
508 | &aflags, zb) != 0) | |
2e528b49 | 509 | return (SET_ERROR(EIO)); |
b128c09f | 510 | |
37abac6d | 511 | err = dump_spill(dsp, zb->zb_object, blksz, abuf->b_data); |
428870ff | 512 | (void) arc_buf_remove_ref(abuf, &abuf); |
9b67f605 MA |
513 | } else if (backup_do_embed(dsp, bp)) { |
514 | /* it's an embedded level-0 block of a regular object */ | |
515 | int blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
516 | err = dump_write_embedded(dsp, zb->zb_object, | |
517 | zb->zb_blkid * blksz, blksz, bp); | |
428870ff BB |
518 | } else { /* it's a level-0 block of a regular object */ |
519 | uint32_t aflags = ARC_WAIT; | |
520 | arc_buf_t *abuf; | |
521 | int blksz = BP_GET_LSIZE(bp); | |
522 | ||
9b67f605 | 523 | ASSERT3U(blksz, ==, dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT); |
da536844 | 524 | ASSERT0(zb->zb_level); |
294f6806 GW |
525 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
526 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
527 | &aflags, zb) != 0) { | |
330d06f9 MA |
528 | if (zfs_send_corrupt_data) { |
529 | uint64_t *ptr; | |
530 | /* Send a block filled with 0x"zfs badd bloc" */ | |
531 | abuf = arc_buf_alloc(spa, blksz, &abuf, | |
532 | ARC_BUFC_DATA); | |
533 | for (ptr = abuf->b_data; | |
534 | (char *)ptr < (char *)abuf->b_data + blksz; | |
535 | ptr++) | |
dd26aa53 | 536 | *ptr = 0x2f5baddb10cULL; |
330d06f9 | 537 | } else { |
2e528b49 | 538 | return (SET_ERROR(EIO)); |
330d06f9 MA |
539 | } |
540 | } | |
428870ff | 541 | |
9b67f605 | 542 | err = dump_write(dsp, type, zb->zb_object, zb->zb_blkid * blksz, |
428870ff | 543 | blksz, bp, abuf->b_data); |
b128c09f | 544 | (void) arc_buf_remove_ref(abuf, &abuf); |
34dc7c2f BB |
545 | } |
546 | ||
547 | ASSERT(err == 0 || err == EINTR); | |
548 | return (err); | |
549 | } | |
550 | ||
6f1ffb06 | 551 | /* |
da536844 | 552 | * Releases dp using the specified tag. |
6f1ffb06 | 553 | */ |
13fe0198 MA |
554 | static int |
555 | dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *ds, | |
9b67f605 MA |
556 | zfs_bookmark_phys_t *fromzb, boolean_t is_clone, boolean_t embedok, |
557 | int outfd, vnode_t *vp, offset_t *off) | |
34dc7c2f | 558 | { |
13fe0198 | 559 | objset_t *os; |
34dc7c2f | 560 | dmu_replay_record_t *drr; |
37abac6d | 561 | dmu_sendarg_t *dsp; |
34dc7c2f BB |
562 | int err; |
563 | uint64_t fromtxg = 0; | |
9b67f605 | 564 | uint64_t featureflags = 0; |
34dc7c2f | 565 | |
13fe0198 MA |
566 | err = dmu_objset_from_ds(ds, &os); |
567 | if (err != 0) { | |
13fe0198 MA |
568 | dsl_pool_rele(dp, tag); |
569 | return (err); | |
570 | } | |
34dc7c2f | 571 | |
34dc7c2f BB |
572 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
573 | drr->drr_type = DRR_BEGIN; | |
574 | drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
428870ff BB |
575 | DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, |
576 | DMU_SUBSTREAM); | |
577 | ||
578 | #ifdef _KERNEL | |
13fe0198 | 579 | if (dmu_objset_type(os) == DMU_OST_ZFS) { |
428870ff | 580 | uint64_t version; |
13fe0198 | 581 | if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { |
37abac6d | 582 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
13fe0198 | 583 | dsl_pool_rele(dp, tag); |
2e528b49 | 584 | return (SET_ERROR(EINVAL)); |
37abac6d | 585 | } |
13fe0198 | 586 | if (version >= ZPL_VERSION_SA) { |
9b67f605 | 587 | featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; |
428870ff BB |
588 | } |
589 | } | |
590 | #endif | |
591 | ||
9b67f605 MA |
592 | if (embedok && |
593 | spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
594 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; | |
595 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) | |
596 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; | |
597 | } else { | |
598 | embedok = B_FALSE; | |
599 | } | |
600 | ||
601 | DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, | |
602 | featureflags); | |
603 | ||
34dc7c2f BB |
604 | drr->drr_u.drr_begin.drr_creation_time = |
605 | ds->ds_phys->ds_creation_time; | |
13fe0198 | 606 | drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); |
da536844 | 607 | if (is_clone) |
34dc7c2f BB |
608 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; |
609 | drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid; | |
610 | if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) | |
611 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; | |
612 | ||
da536844 MA |
613 | if (fromzb != NULL) { |
614 | drr->drr_u.drr_begin.drr_fromguid = fromzb->zbm_guid; | |
615 | fromtxg = fromzb->zbm_creation_txg; | |
616 | } | |
34dc7c2f | 617 | dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname); |
da536844 MA |
618 | if (!dsl_dataset_is_snapshot(ds)) { |
619 | (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", | |
620 | sizeof (drr->drr_u.drr_begin.drr_toname)); | |
13fe0198 | 621 | } |
34dc7c2f | 622 | |
37abac6d BP |
623 | dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); |
624 | ||
625 | dsp->dsa_drr = drr; | |
626 | dsp->dsa_vp = vp; | |
627 | dsp->dsa_outfd = outfd; | |
628 | dsp->dsa_proc = curproc; | |
13fe0198 | 629 | dsp->dsa_os = os; |
37abac6d BP |
630 | dsp->dsa_off = off; |
631 | dsp->dsa_toguid = ds->ds_phys->ds_guid; | |
632 | ZIO_SET_CHECKSUM(&dsp->dsa_zc, 0, 0, 0, 0); | |
633 | dsp->dsa_pending_op = PENDING_NONE; | |
da536844 | 634 | dsp->dsa_incremental = (fromzb != NULL); |
9b67f605 | 635 | dsp->dsa_featureflags = featureflags; |
37abac6d BP |
636 | |
637 | mutex_enter(&ds->ds_sendstream_lock); | |
638 | list_insert_head(&ds->ds_sendstreams, dsp); | |
639 | mutex_exit(&ds->ds_sendstream_lock); | |
640 | ||
7ec09286 MA |
641 | dsl_dataset_long_hold(ds, FTAG); |
642 | dsl_pool_rele(dp, tag); | |
643 | ||
37abac6d BP |
644 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { |
645 | err = dsp->dsa_err; | |
646 | goto out; | |
34dc7c2f BB |
647 | } |
648 | ||
b128c09f | 649 | err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH, |
37abac6d | 650 | backup_cb, dsp); |
34dc7c2f | 651 | |
37abac6d BP |
652 | if (dsp->dsa_pending_op != PENDING_NONE) |
653 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 654 | err = SET_ERROR(EINTR); |
428870ff | 655 | |
13fe0198 MA |
656 | if (err != 0) { |
657 | if (err == EINTR && dsp->dsa_err != 0) | |
37abac6d BP |
658 | err = dsp->dsa_err; |
659 | goto out; | |
34dc7c2f BB |
660 | } |
661 | ||
662 | bzero(drr, sizeof (dmu_replay_record_t)); | |
663 | drr->drr_type = DRR_END; | |
37abac6d BP |
664 | drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; |
665 | drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; | |
34dc7c2f | 666 | |
37abac6d BP |
667 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { |
668 | err = dsp->dsa_err; | |
669 | goto out; | |
34dc7c2f BB |
670 | } |
671 | ||
37abac6d BP |
672 | out: |
673 | mutex_enter(&ds->ds_sendstream_lock); | |
674 | list_remove(&ds->ds_sendstreams, dsp); | |
675 | mutex_exit(&ds->ds_sendstream_lock); | |
676 | ||
34dc7c2f | 677 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
37abac6d | 678 | kmem_free(dsp, sizeof (dmu_sendarg_t)); |
34dc7c2f | 679 | |
13fe0198 | 680 | dsl_dataset_long_rele(ds, FTAG); |
13fe0198 | 681 | |
37abac6d | 682 | return (err); |
34dc7c2f BB |
683 | } |
684 | ||
330d06f9 | 685 | int |
13fe0198 | 686 | dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, |
9b67f605 | 687 | boolean_t embedok, int outfd, vnode_t *vp, offset_t *off) |
13fe0198 MA |
688 | { |
689 | dsl_pool_t *dp; | |
690 | dsl_dataset_t *ds; | |
691 | dsl_dataset_t *fromds = NULL; | |
692 | int err; | |
693 | ||
694 | err = dsl_pool_hold(pool, FTAG, &dp); | |
695 | if (err != 0) | |
696 | return (err); | |
697 | ||
698 | err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); | |
699 | if (err != 0) { | |
700 | dsl_pool_rele(dp, FTAG); | |
701 | return (err); | |
702 | } | |
703 | ||
704 | if (fromsnap != 0) { | |
da536844 MA |
705 | zfs_bookmark_phys_t zb; |
706 | boolean_t is_clone; | |
707 | ||
13fe0198 MA |
708 | err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); |
709 | if (err != 0) { | |
710 | dsl_dataset_rele(ds, FTAG); | |
711 | dsl_pool_rele(dp, FTAG); | |
712 | return (err); | |
713 | } | |
da536844 MA |
714 | if (!dsl_dataset_is_before(ds, fromds, 0)) |
715 | err = SET_ERROR(EXDEV); | |
716 | zb.zbm_creation_time = fromds->ds_phys->ds_creation_time; | |
717 | zb.zbm_creation_txg = fromds->ds_phys->ds_creation_txg; | |
718 | zb.zbm_guid = fromds->ds_phys->ds_guid; | |
719 | is_clone = (fromds->ds_dir != ds->ds_dir); | |
720 | dsl_dataset_rele(fromds, FTAG); | |
9b67f605 | 721 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, embedok, |
da536844 MA |
722 | outfd, vp, off); |
723 | } else { | |
9b67f605 | 724 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, embedok, |
da536844 | 725 | outfd, vp, off); |
13fe0198 | 726 | } |
da536844 MA |
727 | dsl_dataset_rele(ds, FTAG); |
728 | return (err); | |
13fe0198 MA |
729 | } |
730 | ||
731 | int | |
9b67f605 | 732 | dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok, |
13fe0198 MA |
733 | int outfd, vnode_t *vp, offset_t *off) |
734 | { | |
735 | dsl_pool_t *dp; | |
736 | dsl_dataset_t *ds; | |
13fe0198 | 737 | int err; |
da536844 | 738 | boolean_t owned = B_FALSE; |
13fe0198 | 739 | |
da536844 | 740 | if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) |
2e528b49 | 741 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
742 | |
743 | err = dsl_pool_hold(tosnap, FTAG, &dp); | |
744 | if (err != 0) | |
745 | return (err); | |
746 | ||
da536844 MA |
747 | if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { |
748 | /* | |
749 | * We are sending a filesystem or volume. Ensure | |
750 | * that it doesn't change by owning the dataset. | |
751 | */ | |
752 | err = dsl_dataset_own(dp, tosnap, FTAG, &ds); | |
753 | owned = B_TRUE; | |
754 | } else { | |
755 | err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); | |
756 | } | |
13fe0198 MA |
757 | if (err != 0) { |
758 | dsl_pool_rele(dp, FTAG); | |
759 | return (err); | |
760 | } | |
761 | ||
762 | if (fromsnap != NULL) { | |
da536844 MA |
763 | zfs_bookmark_phys_t zb; |
764 | boolean_t is_clone = B_FALSE; | |
765 | int fsnamelen = strchr(tosnap, '@') - tosnap; | |
766 | ||
767 | /* | |
768 | * If the fromsnap is in a different filesystem, then | |
769 | * mark the send stream as a clone. | |
770 | */ | |
771 | if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || | |
772 | (fromsnap[fsnamelen] != '@' && | |
773 | fromsnap[fsnamelen] != '#')) { | |
774 | is_clone = B_TRUE; | |
775 | } | |
776 | ||
777 | if (strchr(fromsnap, '@')) { | |
778 | dsl_dataset_t *fromds; | |
779 | err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); | |
780 | if (err == 0) { | |
781 | if (!dsl_dataset_is_before(ds, fromds, 0)) | |
782 | err = SET_ERROR(EXDEV); | |
783 | zb.zbm_creation_time = | |
784 | fromds->ds_phys->ds_creation_time; | |
785 | zb.zbm_creation_txg = | |
786 | fromds->ds_phys->ds_creation_txg; | |
787 | zb.zbm_guid = fromds->ds_phys->ds_guid; | |
788 | is_clone = (ds->ds_dir != fromds->ds_dir); | |
789 | dsl_dataset_rele(fromds, FTAG); | |
790 | } | |
791 | } else { | |
792 | err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); | |
793 | } | |
13fe0198 MA |
794 | if (err != 0) { |
795 | dsl_dataset_rele(ds, FTAG); | |
796 | dsl_pool_rele(dp, FTAG); | |
797 | return (err); | |
798 | } | |
9b67f605 | 799 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, embedok, |
da536844 MA |
800 | outfd, vp, off); |
801 | } else { | |
9b67f605 | 802 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, embedok, |
da536844 | 803 | outfd, vp, off); |
13fe0198 | 804 | } |
da536844 MA |
805 | if (owned) |
806 | dsl_dataset_disown(ds, FTAG); | |
807 | else | |
808 | dsl_dataset_rele(ds, FTAG); | |
809 | return (err); | |
13fe0198 MA |
810 | } |
811 | ||
812 | int | |
813 | dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) | |
330d06f9 | 814 | { |
330d06f9 MA |
815 | int err; |
816 | uint64_t size, recordsize; | |
13fe0198 MA |
817 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
818 | ||
819 | ASSERT(dsl_pool_config_held(dp)); | |
330d06f9 MA |
820 | |
821 | /* tosnap must be a snapshot */ | |
13fe0198 | 822 | if (!dsl_dataset_is_snapshot(ds)) |
2e528b49 | 823 | return (SET_ERROR(EINVAL)); |
330d06f9 | 824 | |
6f1ffb06 MA |
825 | /* |
826 | * fromsnap must be an earlier snapshot from the same fs as tosnap, | |
827 | * or the origin's fs. | |
828 | */ | |
da536844 | 829 | if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) |
2e528b49 | 830 | return (SET_ERROR(EXDEV)); |
330d06f9 | 831 | |
330d06f9 MA |
832 | /* Get uncompressed size estimate of changed data. */ |
833 | if (fromds == NULL) { | |
834 | size = ds->ds_phys->ds_uncompressed_bytes; | |
835 | } else { | |
836 | uint64_t used, comp; | |
837 | err = dsl_dataset_space_written(fromds, ds, | |
838 | &used, &comp, &size); | |
13fe0198 | 839 | if (err != 0) |
330d06f9 MA |
840 | return (err); |
841 | } | |
842 | ||
843 | /* | |
844 | * Assume that space (both on-disk and in-stream) is dominated by | |
845 | * data. We will adjust for indirect blocks and the copies property, | |
846 | * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). | |
847 | */ | |
848 | ||
849 | /* | |
850 | * Subtract out approximate space used by indirect blocks. | |
851 | * Assume most space is used by data blocks (non-indirect, non-dnode). | |
852 | * Assume all blocks are recordsize. Assume ditto blocks and | |
853 | * internal fragmentation counter out compression. | |
854 | * | |
855 | * Therefore, space used by indirect blocks is sizeof(blkptr_t) per | |
856 | * block, which we observe in practice. | |
857 | */ | |
13fe0198 MA |
858 | err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); |
859 | if (err != 0) | |
330d06f9 MA |
860 | return (err); |
861 | size -= size / recordsize * sizeof (blkptr_t); | |
862 | ||
863 | /* Add in the space for the record associated with each block. */ | |
864 | size += size / recordsize * sizeof (dmu_replay_record_t); | |
865 | ||
866 | *sizep = size; | |
867 | ||
868 | return (0); | |
869 | } | |
870 | ||
13fe0198 MA |
871 | typedef struct dmu_recv_begin_arg { |
872 | const char *drba_origin; | |
873 | dmu_recv_cookie_t *drba_cookie; | |
874 | cred_t *drba_cred; | |
19580676 | 875 | uint64_t drba_snapobj; |
13fe0198 | 876 | } dmu_recv_begin_arg_t; |
34dc7c2f | 877 | |
34dc7c2f | 878 | static int |
13fe0198 MA |
879 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, |
880 | uint64_t fromguid) | |
34dc7c2f | 881 | { |
34dc7c2f | 882 | uint64_t val; |
13fe0198 MA |
883 | int error; |
884 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
34dc7c2f | 885 | |
13fe0198 MA |
886 | /* temporary clone name must not exist */ |
887 | error = zap_lookup(dp->dp_meta_objset, | |
888 | ds->ds_dir->dd_phys->dd_child_dir_zapobj, recv_clone_name, | |
889 | 8, 1, &val); | |
890 | if (error != ENOENT) | |
891 | return (error == 0 ? EBUSY : error); | |
892 | ||
572e2857 | 893 | /* new snapshot name must not exist */ |
13fe0198 MA |
894 | error = zap_lookup(dp->dp_meta_objset, |
895 | ds->ds_phys->ds_snapnames_zapobj, drba->drba_cookie->drc_tosnap, | |
896 | 8, 1, &val); | |
897 | if (error != ENOENT) | |
898 | return (error == 0 ? EEXIST : error); | |
572e2857 | 899 | |
13fe0198 | 900 | if (fromguid != 0) { |
19580676 MA |
901 | dsl_dataset_t *snap; |
902 | uint64_t obj = ds->ds_phys->ds_prev_snap_obj; | |
903 | ||
904 | /* Find snapshot in this dir that matches fromguid. */ | |
905 | while (obj != 0) { | |
906 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
907 | &snap); | |
908 | if (error != 0) | |
909 | return (SET_ERROR(ENODEV)); | |
910 | if (snap->ds_dir != ds->ds_dir) { | |
911 | dsl_dataset_rele(snap, FTAG); | |
912 | return (SET_ERROR(ENODEV)); | |
913 | } | |
914 | if (snap->ds_phys->ds_guid == fromguid) | |
915 | break; | |
916 | obj = snap->ds_phys->ds_prev_snap_obj; | |
917 | dsl_dataset_rele(snap, FTAG); | |
918 | } | |
919 | if (obj == 0) | |
2e528b49 | 920 | return (SET_ERROR(ENODEV)); |
34dc7c2f | 921 | |
19580676 MA |
922 | if (drba->drba_cookie->drc_force) { |
923 | drba->drba_snapobj = obj; | |
924 | } else { | |
925 | /* | |
926 | * If we are not forcing, there must be no | |
927 | * changes since fromsnap. | |
928 | */ | |
929 | if (dsl_dataset_modified_since_snap(ds, snap)) { | |
428870ff | 930 | dsl_dataset_rele(snap, FTAG); |
19580676 | 931 | return (SET_ERROR(ETXTBSY)); |
428870ff | 932 | } |
19580676 | 933 | drba->drba_snapobj = ds->ds_prev->ds_object; |
428870ff | 934 | } |
19580676 MA |
935 | |
936 | dsl_dataset_rele(snap, FTAG); | |
428870ff BB |
937 | } else { |
938 | /* if full, most recent snapshot must be $ORIGIN */ | |
939 | if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL) | |
2e528b49 | 940 | return (SET_ERROR(ENODEV)); |
19580676 | 941 | drba->drba_snapobj = ds->ds_phys->ds_prev_snap_obj; |
428870ff | 942 | } |
34dc7c2f | 943 | |
34dc7c2f | 944 | return (0); |
13fe0198 MA |
945 | |
946 | } | |
947 | ||
948 | static int | |
949 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
950 | { | |
951 | dmu_recv_begin_arg_t *drba = arg; | |
952 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
953 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
954 | uint64_t fromguid = drrb->drr_fromguid; | |
955 | int flags = drrb->drr_flags; | |
956 | int error; | |
9b67f605 | 957 | uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
13fe0198 MA |
958 | dsl_dataset_t *ds; |
959 | const char *tofs = drba->drba_cookie->drc_tofs; | |
960 | ||
961 | /* already checked */ | |
962 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
963 | ||
964 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
965 | DMU_COMPOUNDSTREAM || | |
966 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
967 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
2e528b49 | 968 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
969 | |
970 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
9b67f605 MA |
971 | if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && |
972 | spa_version(dp->dp_spa) < SPA_VERSION_SA) | |
973 | return (SET_ERROR(ENOTSUP)); | |
974 | ||
975 | /* | |
976 | * The receiving code doesn't know how to translate a WRITE_EMBEDDED | |
977 | * record to a plan WRITE record, so the pool must have the | |
978 | * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED | |
979 | * records. Same with WRITE_EMBEDDED records that use LZ4 compression. | |
980 | */ | |
981 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && | |
982 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) | |
983 | return (SET_ERROR(ENOTSUP)); | |
984 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && | |
985 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) | |
2e528b49 | 986 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
987 | |
988 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); | |
989 | if (error == 0) { | |
990 | /* target fs already exists; recv into temp clone */ | |
991 | ||
992 | /* Can't recv a clone into an existing fs */ | |
993 | if (flags & DRR_FLAG_CLONE) { | |
994 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 995 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
996 | } |
997 | ||
998 | error = recv_begin_check_existing_impl(drba, ds, fromguid); | |
999 | dsl_dataset_rele(ds, FTAG); | |
1000 | } else if (error == ENOENT) { | |
1001 | /* target fs does not exist; must be a full backup or clone */ | |
1002 | char buf[MAXNAMELEN]; | |
1003 | ||
1004 | /* | |
1005 | * If it's a non-clone incremental, we are missing the | |
1006 | * target fs, so fail the recv. | |
1007 | */ | |
1008 | if (fromguid != 0 && !(flags & DRR_FLAG_CLONE)) | |
2e528b49 | 1009 | return (SET_ERROR(ENOENT)); |
13fe0198 MA |
1010 | |
1011 | /* Open the parent of tofs */ | |
1012 | ASSERT3U(strlen(tofs), <, MAXNAMELEN); | |
1013 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); | |
1014 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); | |
1015 | if (error != 0) | |
1016 | return (error); | |
1017 | ||
1018 | if (drba->drba_origin != NULL) { | |
1019 | dsl_dataset_t *origin; | |
1020 | error = dsl_dataset_hold(dp, drba->drba_origin, | |
1021 | FTAG, &origin); | |
1022 | if (error != 0) { | |
1023 | dsl_dataset_rele(ds, FTAG); | |
1024 | return (error); | |
1025 | } | |
1026 | if (!dsl_dataset_is_snapshot(origin)) { | |
1027 | dsl_dataset_rele(origin, FTAG); | |
1028 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1029 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1030 | } |
1031 | if (origin->ds_phys->ds_guid != fromguid) { | |
1032 | dsl_dataset_rele(origin, FTAG); | |
1033 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1034 | return (SET_ERROR(ENODEV)); |
13fe0198 MA |
1035 | } |
1036 | dsl_dataset_rele(origin, FTAG); | |
1037 | } | |
1038 | dsl_dataset_rele(ds, FTAG); | |
1039 | error = 0; | |
1040 | } | |
1041 | return (error); | |
34dc7c2f BB |
1042 | } |
1043 | ||
34dc7c2f | 1044 | static void |
13fe0198 | 1045 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1046 | { |
13fe0198 MA |
1047 | dmu_recv_begin_arg_t *drba = arg; |
1048 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1049 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1050 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1051 | dsl_dataset_t *ds, *newds; | |
34dc7c2f | 1052 | uint64_t dsobj; |
13fe0198 MA |
1053 | int error; |
1054 | uint64_t crflags; | |
1055 | ||
1056 | crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? | |
1057 | DS_FLAG_CI_DATASET : 0; | |
34dc7c2f | 1058 | |
13fe0198 MA |
1059 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1060 | if (error == 0) { | |
1061 | /* create temporary clone */ | |
19580676 MA |
1062 | dsl_dataset_t *snap = NULL; |
1063 | if (drba->drba_snapobj != 0) { | |
1064 | VERIFY0(dsl_dataset_hold_obj(dp, | |
1065 | drba->drba_snapobj, FTAG, &snap)); | |
1066 | } | |
13fe0198 | 1067 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, |
19580676 MA |
1068 | snap, crflags, drba->drba_cred, tx); |
1069 | dsl_dataset_rele(snap, FTAG); | |
13fe0198 MA |
1070 | dsl_dataset_rele(ds, FTAG); |
1071 | } else { | |
1072 | dsl_dir_t *dd; | |
1073 | const char *tail; | |
1074 | dsl_dataset_t *origin = NULL; | |
1075 | ||
1076 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
1077 | ||
1078 | if (drba->drba_origin != NULL) { | |
1079 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
1080 | FTAG, &origin)); | |
1081 | } | |
1082 | ||
1083 | /* Create new dataset. */ | |
1084 | dsobj = dsl_dataset_create_sync(dd, | |
1085 | strrchr(tofs, '/') + 1, | |
1086 | origin, crflags, drba->drba_cred, tx); | |
1087 | if (origin != NULL) | |
1088 | dsl_dataset_rele(origin, FTAG); | |
1089 | dsl_dir_rele(dd, FTAG); | |
1090 | drba->drba_cookie->drc_newfs = B_TRUE; | |
1091 | } | |
1092 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); | |
1093 | ||
1094 | dmu_buf_will_dirty(newds->ds_dbuf, tx); | |
1095 | newds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
34dc7c2f | 1096 | |
428870ff BB |
1097 | /* |
1098 | * If we actually created a non-clone, we need to create the | |
1099 | * objset in our new dataset. | |
1100 | */ | |
13fe0198 | 1101 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { |
428870ff | 1102 | (void) dmu_objset_create_impl(dp->dp_spa, |
13fe0198 | 1103 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); |
428870ff | 1104 | } |
34dc7c2f | 1105 | |
13fe0198 | 1106 | drba->drba_cookie->drc_ds = newds; |
428870ff | 1107 | |
13fe0198 | 1108 | spa_history_log_internal_ds(newds, "receive", tx, ""); |
34dc7c2f BB |
1109 | } |
1110 | ||
34dc7c2f BB |
1111 | /* |
1112 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
1113 | * succeeds; otherwise we will leak the holds on the datasets. | |
1114 | */ | |
1115 | int | |
13fe0198 MA |
1116 | dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, |
1117 | boolean_t force, char *origin, dmu_recv_cookie_t *drc) | |
34dc7c2f | 1118 | { |
13fe0198 MA |
1119 | dmu_recv_begin_arg_t drba = { 0 }; |
1120 | dmu_replay_record_t *drr; | |
34dc7c2f BB |
1121 | |
1122 | bzero(drc, sizeof (dmu_recv_cookie_t)); | |
1123 | drc->drc_drrb = drrb; | |
1124 | drc->drc_tosnap = tosnap; | |
13fe0198 | 1125 | drc->drc_tofs = tofs; |
34dc7c2f BB |
1126 | drc->drc_force = force; |
1127 | ||
13fe0198 MA |
1128 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) |
1129 | drc->drc_byteswap = B_TRUE; | |
1130 | else if (drrb->drr_magic != DMU_BACKUP_MAGIC) | |
2e528b49 | 1131 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1132 | |
13fe0198 MA |
1133 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
1134 | drr->drr_type = DRR_BEGIN; | |
1135 | drr->drr_u.drr_begin = *drc->drc_drrb; | |
1136 | if (drc->drc_byteswap) { | |
1137 | fletcher_4_incremental_byteswap(drr, | |
1138 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1139 | } else { | |
1140 | fletcher_4_incremental_native(drr, | |
1141 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1142 | } | |
1143 | kmem_free(drr, sizeof (dmu_replay_record_t)); | |
428870ff | 1144 | |
13fe0198 MA |
1145 | if (drc->drc_byteswap) { |
1146 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
1147 | drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); | |
1148 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); | |
1149 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
1150 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
1151 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
34dc7c2f BB |
1152 | } |
1153 | ||
13fe0198 MA |
1154 | drba.drba_origin = origin; |
1155 | drba.drba_cookie = drc; | |
1156 | drba.drba_cred = CRED(); | |
1157 | ||
1158 | return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, | |
1159 | &drba, 5)); | |
34dc7c2f BB |
1160 | } |
1161 | ||
1162 | struct restorearg { | |
1163 | int err; | |
13fe0198 | 1164 | boolean_t byteswap; |
34dc7c2f BB |
1165 | vnode_t *vp; |
1166 | char *buf; | |
1167 | uint64_t voff; | |
1168 | int bufsize; /* amount of memory allocated for buf */ | |
1169 | zio_cksum_t cksum; | |
572e2857 | 1170 | avl_tree_t *guid_to_ds_map; |
34dc7c2f BB |
1171 | }; |
1172 | ||
428870ff BB |
1173 | typedef struct guid_map_entry { |
1174 | uint64_t guid; | |
1175 | dsl_dataset_t *gme_ds; | |
1176 | avl_node_t avlnode; | |
1177 | } guid_map_entry_t; | |
1178 | ||
1179 | static int | |
1180 | guid_compare(const void *arg1, const void *arg2) | |
1181 | { | |
1182 | const guid_map_entry_t *gmep1 = arg1; | |
1183 | const guid_map_entry_t *gmep2 = arg2; | |
1184 | ||
1185 | if (gmep1->guid < gmep2->guid) | |
1186 | return (-1); | |
1187 | else if (gmep1->guid > gmep2->guid) | |
1188 | return (1); | |
1189 | return (0); | |
1190 | } | |
1191 | ||
572e2857 BB |
1192 | static void |
1193 | free_guid_map_onexit(void *arg) | |
1194 | { | |
1195 | avl_tree_t *ca = arg; | |
1196 | void *cookie = NULL; | |
1197 | guid_map_entry_t *gmep; | |
1198 | ||
1199 | while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { | |
13fe0198 | 1200 | dsl_dataset_long_rele(gmep->gme_ds, gmep); |
7ec09286 | 1201 | dsl_dataset_rele(gmep->gme_ds, gmep); |
572e2857 BB |
1202 | kmem_free(gmep, sizeof (guid_map_entry_t)); |
1203 | } | |
1204 | avl_destroy(ca); | |
1205 | kmem_free(ca, sizeof (avl_tree_t)); | |
1206 | } | |
1207 | ||
34dc7c2f BB |
1208 | static void * |
1209 | restore_read(struct restorearg *ra, int len) | |
1210 | { | |
1211 | void *rv; | |
1212 | int done = 0; | |
1213 | ||
1214 | /* some things will require 8-byte alignment, so everything must */ | |
c99c9001 | 1215 | ASSERT0(len % 8); |
34dc7c2f BB |
1216 | |
1217 | while (done < len) { | |
1218 | ssize_t resid; | |
1219 | ||
1220 | ra->err = vn_rdwr(UIO_READ, ra->vp, | |
1221 | (caddr_t)ra->buf + done, len - done, | |
1222 | ra->voff, UIO_SYSSPACE, FAPPEND, | |
1223 | RLIM64_INFINITY, CRED(), &resid); | |
1224 | ||
1225 | if (resid == len - done) | |
2e528b49 | 1226 | ra->err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1227 | ra->voff += len - done - resid; |
1228 | done = len - resid; | |
13fe0198 | 1229 | if (ra->err != 0) |
34dc7c2f BB |
1230 | return (NULL); |
1231 | } | |
1232 | ||
1233 | ASSERT3U(done, ==, len); | |
1234 | rv = ra->buf; | |
1235 | if (ra->byteswap) | |
1236 | fletcher_4_incremental_byteswap(rv, len, &ra->cksum); | |
1237 | else | |
1238 | fletcher_4_incremental_native(rv, len, &ra->cksum); | |
1239 | return (rv); | |
1240 | } | |
1241 | ||
60948de1 | 1242 | noinline static void |
34dc7c2f BB |
1243 | backup_byteswap(dmu_replay_record_t *drr) |
1244 | { | |
1245 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
1246 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
1247 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1248 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
1249 | switch (drr->drr_type) { | |
1250 | case DRR_BEGIN: | |
1251 | DO64(drr_begin.drr_magic); | |
428870ff | 1252 | DO64(drr_begin.drr_versioninfo); |
34dc7c2f BB |
1253 | DO64(drr_begin.drr_creation_time); |
1254 | DO32(drr_begin.drr_type); | |
1255 | DO32(drr_begin.drr_flags); | |
1256 | DO64(drr_begin.drr_toguid); | |
1257 | DO64(drr_begin.drr_fromguid); | |
1258 | break; | |
1259 | case DRR_OBJECT: | |
1260 | DO64(drr_object.drr_object); | |
34dc7c2f BB |
1261 | DO32(drr_object.drr_type); |
1262 | DO32(drr_object.drr_bonustype); | |
1263 | DO32(drr_object.drr_blksz); | |
1264 | DO32(drr_object.drr_bonuslen); | |
428870ff | 1265 | DO64(drr_object.drr_toguid); |
34dc7c2f BB |
1266 | break; |
1267 | case DRR_FREEOBJECTS: | |
1268 | DO64(drr_freeobjects.drr_firstobj); | |
1269 | DO64(drr_freeobjects.drr_numobjs); | |
428870ff | 1270 | DO64(drr_freeobjects.drr_toguid); |
34dc7c2f BB |
1271 | break; |
1272 | case DRR_WRITE: | |
1273 | DO64(drr_write.drr_object); | |
1274 | DO32(drr_write.drr_type); | |
1275 | DO64(drr_write.drr_offset); | |
1276 | DO64(drr_write.drr_length); | |
428870ff BB |
1277 | DO64(drr_write.drr_toguid); |
1278 | DO64(drr_write.drr_key.ddk_cksum.zc_word[0]); | |
1279 | DO64(drr_write.drr_key.ddk_cksum.zc_word[1]); | |
1280 | DO64(drr_write.drr_key.ddk_cksum.zc_word[2]); | |
1281 | DO64(drr_write.drr_key.ddk_cksum.zc_word[3]); | |
1282 | DO64(drr_write.drr_key.ddk_prop); | |
1283 | break; | |
1284 | case DRR_WRITE_BYREF: | |
1285 | DO64(drr_write_byref.drr_object); | |
1286 | DO64(drr_write_byref.drr_offset); | |
1287 | DO64(drr_write_byref.drr_length); | |
1288 | DO64(drr_write_byref.drr_toguid); | |
1289 | DO64(drr_write_byref.drr_refguid); | |
1290 | DO64(drr_write_byref.drr_refobject); | |
1291 | DO64(drr_write_byref.drr_refoffset); | |
1292 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]); | |
1293 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]); | |
1294 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]); | |
1295 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]); | |
1296 | DO64(drr_write_byref.drr_key.ddk_prop); | |
34dc7c2f | 1297 | break; |
9b67f605 MA |
1298 | case DRR_WRITE_EMBEDDED: |
1299 | DO64(drr_write_embedded.drr_object); | |
1300 | DO64(drr_write_embedded.drr_offset); | |
1301 | DO64(drr_write_embedded.drr_length); | |
1302 | DO64(drr_write_embedded.drr_toguid); | |
1303 | DO32(drr_write_embedded.drr_lsize); | |
1304 | DO32(drr_write_embedded.drr_psize); | |
1305 | break; | |
34dc7c2f BB |
1306 | case DRR_FREE: |
1307 | DO64(drr_free.drr_object); | |
1308 | DO64(drr_free.drr_offset); | |
1309 | DO64(drr_free.drr_length); | |
428870ff BB |
1310 | DO64(drr_free.drr_toguid); |
1311 | break; | |
1312 | case DRR_SPILL: | |
1313 | DO64(drr_spill.drr_object); | |
1314 | DO64(drr_spill.drr_length); | |
1315 | DO64(drr_spill.drr_toguid); | |
34dc7c2f BB |
1316 | break; |
1317 | case DRR_END: | |
1318 | DO64(drr_end.drr_checksum.zc_word[0]); | |
1319 | DO64(drr_end.drr_checksum.zc_word[1]); | |
1320 | DO64(drr_end.drr_checksum.zc_word[2]); | |
1321 | DO64(drr_end.drr_checksum.zc_word[3]); | |
428870ff | 1322 | DO64(drr_end.drr_toguid); |
34dc7c2f | 1323 | break; |
e75c13c3 BB |
1324 | default: |
1325 | break; | |
34dc7c2f BB |
1326 | } |
1327 | #undef DO64 | |
1328 | #undef DO32 | |
1329 | } | |
1330 | ||
60948de1 | 1331 | noinline static int |
34dc7c2f BB |
1332 | restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) |
1333 | { | |
1334 | int err; | |
1335 | dmu_tx_t *tx; | |
b128c09f | 1336 | void *data = NULL; |
34dc7c2f | 1337 | |
34dc7c2f | 1338 | if (drro->drr_type == DMU_OT_NONE || |
9ae529ec CS |
1339 | !DMU_OT_IS_VALID(drro->drr_type) || |
1340 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
428870ff | 1341 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || |
34dc7c2f BB |
1342 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || |
1343 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
1344 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
1345 | drro->drr_blksz > SPA_MAXBLOCKSIZE || | |
1346 | drro->drr_bonuslen > DN_MAX_BONUSLEN) { | |
2e528b49 | 1347 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1348 | } |
1349 | ||
9babb374 BB |
1350 | err = dmu_object_info(os, drro->drr_object, NULL); |
1351 | ||
1352 | if (err != 0 && err != ENOENT) | |
2e528b49 | 1353 | return (SET_ERROR(EINVAL)); |
9babb374 | 1354 | |
b128c09f BB |
1355 | if (drro->drr_bonuslen) { |
1356 | data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8)); | |
13fe0198 | 1357 | if (ra->err != 0) |
b128c09f BB |
1358 | return (ra->err); |
1359 | } | |
1360 | ||
34dc7c2f BB |
1361 | if (err == ENOENT) { |
1362 | /* currently free, want to be allocated */ | |
9babb374 | 1363 | tx = dmu_tx_create(os); |
34dc7c2f | 1364 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); |
34dc7c2f | 1365 | err = dmu_tx_assign(tx, TXG_WAIT); |
13fe0198 | 1366 | if (err != 0) { |
34dc7c2f BB |
1367 | dmu_tx_abort(tx); |
1368 | return (err); | |
1369 | } | |
1370 | err = dmu_object_claim(os, drro->drr_object, | |
1371 | drro->drr_type, drro->drr_blksz, | |
1372 | drro->drr_bonustype, drro->drr_bonuslen, tx); | |
9babb374 | 1373 | dmu_tx_commit(tx); |
34dc7c2f BB |
1374 | } else { |
1375 | /* currently allocated, want to be allocated */ | |
34dc7c2f BB |
1376 | err = dmu_object_reclaim(os, drro->drr_object, |
1377 | drro->drr_type, drro->drr_blksz, | |
9babb374 | 1378 | drro->drr_bonustype, drro->drr_bonuslen); |
34dc7c2f | 1379 | } |
13fe0198 | 1380 | if (err != 0) { |
2e528b49 | 1381 | return (SET_ERROR(EINVAL)); |
428870ff | 1382 | } |
9babb374 BB |
1383 | |
1384 | tx = dmu_tx_create(os); | |
1385 | dmu_tx_hold_bonus(tx, drro->drr_object); | |
1386 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1387 | if (err != 0) { |
9babb374 BB |
1388 | dmu_tx_abort(tx); |
1389 | return (err); | |
34dc7c2f BB |
1390 | } |
1391 | ||
428870ff BB |
1392 | dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype, |
1393 | tx); | |
34dc7c2f BB |
1394 | dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx); |
1395 | ||
b128c09f | 1396 | if (data != NULL) { |
34dc7c2f | 1397 | dmu_buf_t *db; |
b128c09f | 1398 | |
34dc7c2f BB |
1399 | VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db)); |
1400 | dmu_buf_will_dirty(db, tx); | |
1401 | ||
1402 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
34dc7c2f BB |
1403 | bcopy(data, db->db_data, drro->drr_bonuslen); |
1404 | if (ra->byteswap) { | |
9ae529ec CS |
1405 | dmu_object_byteswap_t byteswap = |
1406 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
1407 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
34dc7c2f BB |
1408 | drro->drr_bonuslen); |
1409 | } | |
1410 | dmu_buf_rele(db, FTAG); | |
1411 | } | |
1412 | dmu_tx_commit(tx); | |
1413 | return (0); | |
1414 | } | |
1415 | ||
1416 | /* ARGSUSED */ | |
60948de1 | 1417 | noinline static int |
34dc7c2f BB |
1418 | restore_freeobjects(struct restorearg *ra, objset_t *os, |
1419 | struct drr_freeobjects *drrfo) | |
1420 | { | |
1421 | uint64_t obj; | |
1422 | ||
1423 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
2e528b49 | 1424 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1425 | |
1426 | for (obj = drrfo->drr_firstobj; | |
1427 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs; | |
1428 | (void) dmu_object_next(os, &obj, FALSE, 0)) { | |
34dc7c2f BB |
1429 | int err; |
1430 | ||
1431 | if (dmu_object_info(os, obj, NULL) != 0) | |
1432 | continue; | |
1433 | ||
b663a23d | 1434 | err = dmu_free_long_object(os, obj); |
13fe0198 | 1435 | if (err != 0) |
34dc7c2f | 1436 | return (err); |
34dc7c2f BB |
1437 | } |
1438 | return (0); | |
1439 | } | |
1440 | ||
60948de1 | 1441 | noinline static int |
34dc7c2f BB |
1442 | restore_write(struct restorearg *ra, objset_t *os, |
1443 | struct drr_write *drrw) | |
1444 | { | |
1445 | dmu_tx_t *tx; | |
1446 | void *data; | |
1447 | int err; | |
1448 | ||
1449 | if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || | |
9ae529ec | 1450 | !DMU_OT_IS_VALID(drrw->drr_type)) |
2e528b49 | 1451 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1452 | |
1453 | data = restore_read(ra, drrw->drr_length); | |
1454 | if (data == NULL) | |
1455 | return (ra->err); | |
1456 | ||
1457 | if (dmu_object_info(os, drrw->drr_object, NULL) != 0) | |
2e528b49 | 1458 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1459 | |
1460 | tx = dmu_tx_create(os); | |
1461 | ||
1462 | dmu_tx_hold_write(tx, drrw->drr_object, | |
1463 | drrw->drr_offset, drrw->drr_length); | |
1464 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1465 | if (err != 0) { |
34dc7c2f BB |
1466 | dmu_tx_abort(tx); |
1467 | return (err); | |
1468 | } | |
9ae529ec CS |
1469 | if (ra->byteswap) { |
1470 | dmu_object_byteswap_t byteswap = | |
1471 | DMU_OT_BYTESWAP(drrw->drr_type); | |
1472 | dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length); | |
1473 | } | |
34dc7c2f BB |
1474 | dmu_write(os, drrw->drr_object, |
1475 | drrw->drr_offset, drrw->drr_length, data, tx); | |
1476 | dmu_tx_commit(tx); | |
1477 | return (0); | |
1478 | } | |
1479 | ||
428870ff BB |
1480 | /* |
1481 | * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed | |
1482 | * streams to refer to a copy of the data that is already on the | |
1483 | * system because it came in earlier in the stream. This function | |
1484 | * finds the earlier copy of the data, and uses that copy instead of | |
1485 | * data from the stream to fulfill this write. | |
1486 | */ | |
1487 | static int | |
1488 | restore_write_byref(struct restorearg *ra, objset_t *os, | |
1489 | struct drr_write_byref *drrwbr) | |
1490 | { | |
1491 | dmu_tx_t *tx; | |
1492 | int err; | |
1493 | guid_map_entry_t gmesrch; | |
1494 | guid_map_entry_t *gmep; | |
9b67f605 | 1495 | avl_index_t where; |
428870ff BB |
1496 | objset_t *ref_os = NULL; |
1497 | dmu_buf_t *dbp; | |
1498 | ||
1499 | if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) | |
2e528b49 | 1500 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1501 | |
1502 | /* | |
1503 | * If the GUID of the referenced dataset is different from the | |
1504 | * GUID of the target dataset, find the referenced dataset. | |
1505 | */ | |
1506 | if (drrwbr->drr_toguid != drrwbr->drr_refguid) { | |
1507 | gmesrch.guid = drrwbr->drr_refguid; | |
572e2857 | 1508 | if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch, |
428870ff | 1509 | &where)) == NULL) { |
2e528b49 | 1510 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1511 | } |
1512 | if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) | |
2e528b49 | 1513 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1514 | } else { |
1515 | ref_os = os; | |
1516 | } | |
1517 | ||
c65aa5b2 BB |
1518 | err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, |
1519 | drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); | |
9b67f605 | 1520 | if (err != 0) |
428870ff BB |
1521 | return (err); |
1522 | ||
1523 | tx = dmu_tx_create(os); | |
1524 | ||
1525 | dmu_tx_hold_write(tx, drrwbr->drr_object, | |
1526 | drrwbr->drr_offset, drrwbr->drr_length); | |
1527 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1528 | if (err != 0) { |
428870ff BB |
1529 | dmu_tx_abort(tx); |
1530 | return (err); | |
1531 | } | |
1532 | dmu_write(os, drrwbr->drr_object, | |
1533 | drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); | |
1534 | dmu_buf_rele(dbp, FTAG); | |
1535 | dmu_tx_commit(tx); | |
1536 | return (0); | |
1537 | } | |
1538 | ||
9b67f605 MA |
1539 | static int |
1540 | restore_write_embedded(struct restorearg *ra, objset_t *os, | |
1541 | struct drr_write_embedded *drrwnp) | |
1542 | { | |
1543 | dmu_tx_t *tx; | |
1544 | int err; | |
1545 | void *data; | |
1546 | ||
1547 | if (drrwnp->drr_offset + drrwnp->drr_length < drrwnp->drr_offset) | |
1548 | return (EINVAL); | |
1549 | ||
1550 | if (drrwnp->drr_psize > BPE_PAYLOAD_SIZE) | |
1551 | return (EINVAL); | |
1552 | ||
1553 | if (drrwnp->drr_etype >= NUM_BP_EMBEDDED_TYPES) | |
1554 | return (EINVAL); | |
1555 | if (drrwnp->drr_compression >= ZIO_COMPRESS_FUNCTIONS) | |
1556 | return (EINVAL); | |
1557 | ||
1558 | data = restore_read(ra, P2ROUNDUP(drrwnp->drr_psize, 8)); | |
1559 | if (data == NULL) | |
1560 | return (ra->err); | |
1561 | ||
1562 | tx = dmu_tx_create(os); | |
1563 | ||
1564 | dmu_tx_hold_write(tx, drrwnp->drr_object, | |
1565 | drrwnp->drr_offset, drrwnp->drr_length); | |
1566 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1567 | if (err != 0) { | |
1568 | dmu_tx_abort(tx); | |
1569 | return (err); | |
1570 | } | |
1571 | ||
1572 | dmu_write_embedded(os, drrwnp->drr_object, | |
1573 | drrwnp->drr_offset, data, drrwnp->drr_etype, | |
1574 | drrwnp->drr_compression, drrwnp->drr_lsize, drrwnp->drr_psize, | |
1575 | ra->byteswap ^ ZFS_HOST_BYTEORDER, tx); | |
1576 | ||
1577 | dmu_tx_commit(tx); | |
1578 | return (0); | |
1579 | } | |
1580 | ||
428870ff BB |
1581 | static int |
1582 | restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs) | |
1583 | { | |
1584 | dmu_tx_t *tx; | |
1585 | void *data; | |
1586 | dmu_buf_t *db, *db_spill; | |
1587 | int err; | |
1588 | ||
1589 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
1590 | drrs->drr_length > SPA_MAXBLOCKSIZE) | |
2e528b49 | 1591 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1592 | |
1593 | data = restore_read(ra, drrs->drr_length); | |
1594 | if (data == NULL) | |
1595 | return (ra->err); | |
1596 | ||
1597 | if (dmu_object_info(os, drrs->drr_object, NULL) != 0) | |
2e528b49 | 1598 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1599 | |
1600 | VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db)); | |
1601 | if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { | |
1602 | dmu_buf_rele(db, FTAG); | |
1603 | return (err); | |
1604 | } | |
1605 | ||
1606 | tx = dmu_tx_create(os); | |
1607 | ||
1608 | dmu_tx_hold_spill(tx, db->db_object); | |
1609 | ||
1610 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1611 | if (err != 0) { |
428870ff BB |
1612 | dmu_buf_rele(db, FTAG); |
1613 | dmu_buf_rele(db_spill, FTAG); | |
1614 | dmu_tx_abort(tx); | |
1615 | return (err); | |
1616 | } | |
1617 | dmu_buf_will_dirty(db_spill, tx); | |
1618 | ||
1619 | if (db_spill->db_size < drrs->drr_length) | |
1620 | VERIFY(0 == dbuf_spill_set_blksz(db_spill, | |
1621 | drrs->drr_length, tx)); | |
1622 | bcopy(data, db_spill->db_data, drrs->drr_length); | |
1623 | ||
1624 | dmu_buf_rele(db, FTAG); | |
1625 | dmu_buf_rele(db_spill, FTAG); | |
1626 | ||
1627 | dmu_tx_commit(tx); | |
1628 | return (0); | |
1629 | } | |
1630 | ||
34dc7c2f | 1631 | /* ARGSUSED */ |
60948de1 | 1632 | noinline static int |
34dc7c2f BB |
1633 | restore_free(struct restorearg *ra, objset_t *os, |
1634 | struct drr_free *drrf) | |
1635 | { | |
34dc7c2f BB |
1636 | int err; |
1637 | ||
1638 | if (drrf->drr_length != -1ULL && | |
1639 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) | |
2e528b49 | 1640 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1641 | |
1642 | if (dmu_object_info(os, drrf->drr_object, NULL) != 0) | |
2e528b49 | 1643 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1644 | |
b128c09f | 1645 | err = dmu_free_long_range(os, drrf->drr_object, |
34dc7c2f | 1646 | drrf->drr_offset, drrf->drr_length); |
34dc7c2f BB |
1647 | return (err); |
1648 | } | |
1649 | ||
13fe0198 MA |
1650 | /* used to destroy the drc_ds on error */ |
1651 | static void | |
1652 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
1653 | { | |
1654 | char name[MAXNAMELEN]; | |
1655 | dsl_dataset_name(drc->drc_ds, name); | |
1656 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1657 | (void) dsl_destroy_head(name); | |
1658 | } | |
1659 | ||
34dc7c2f BB |
1660 | /* |
1661 | * NB: callers *must* call dmu_recv_end() if this succeeds. | |
1662 | */ | |
1663 | int | |
572e2857 BB |
1664 | dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, |
1665 | int cleanup_fd, uint64_t *action_handlep) | |
34dc7c2f BB |
1666 | { |
1667 | struct restorearg ra = { 0 }; | |
1668 | dmu_replay_record_t *drr; | |
1669 | objset_t *os; | |
1670 | zio_cksum_t pcksum; | |
428870ff | 1671 | int featureflags; |
34dc7c2f | 1672 | |
13fe0198 MA |
1673 | ra.byteswap = drc->drc_byteswap; |
1674 | ra.cksum = drc->drc_cksum; | |
34dc7c2f BB |
1675 | ra.vp = vp; |
1676 | ra.voff = *voffp; | |
1677 | ra.bufsize = 1<<20; | |
00b46022 | 1678 | ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP); |
34dc7c2f BB |
1679 | |
1680 | /* these were verified in dmu_recv_begin */ | |
13fe0198 | 1681 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, |
428870ff | 1682 | DMU_SUBSTREAM); |
13fe0198 | 1683 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); |
34dc7c2f BB |
1684 | |
1685 | /* | |
1686 | * Open the objset we are modifying. | |
1687 | */ | |
13fe0198 | 1688 | VERIFY0(dmu_objset_from_ds(drc->drc_ds, &os)); |
34dc7c2f | 1689 | |
13fe0198 | 1690 | ASSERT(drc->drc_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT); |
34dc7c2f | 1691 | |
428870ff BB |
1692 | featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); |
1693 | ||
1694 | /* if this stream is dedup'ed, set up the avl tree for guid mapping */ | |
1695 | if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { | |
572e2857 BB |
1696 | minor_t minor; |
1697 | ||
1698 | if (cleanup_fd == -1) { | |
2e528b49 | 1699 | ra.err = SET_ERROR(EBADF); |
572e2857 BB |
1700 | goto out; |
1701 | } | |
1702 | ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); | |
13fe0198 | 1703 | if (ra.err != 0) { |
572e2857 BB |
1704 | cleanup_fd = -1; |
1705 | goto out; | |
1706 | } | |
1707 | ||
1708 | if (*action_handlep == 0) { | |
1709 | ra.guid_to_ds_map = | |
1710 | kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); | |
1711 | avl_create(ra.guid_to_ds_map, guid_compare, | |
1712 | sizeof (guid_map_entry_t), | |
1713 | offsetof(guid_map_entry_t, avlnode)); | |
572e2857 BB |
1714 | ra.err = zfs_onexit_add_cb(minor, |
1715 | free_guid_map_onexit, ra.guid_to_ds_map, | |
1716 | action_handlep); | |
13fe0198 | 1717 | if (ra.err != 0) |
572e2857 BB |
1718 | goto out; |
1719 | } else { | |
1720 | ra.err = zfs_onexit_cb_data(minor, *action_handlep, | |
1721 | (void **)&ra.guid_to_ds_map); | |
13fe0198 | 1722 | if (ra.err != 0) |
572e2857 BB |
1723 | goto out; |
1724 | } | |
8d35c149 AS |
1725 | |
1726 | drc->drc_guid_to_ds_map = ra.guid_to_ds_map; | |
428870ff BB |
1727 | } |
1728 | ||
34dc7c2f BB |
1729 | /* |
1730 | * Read records and process them. | |
1731 | */ | |
1732 | pcksum = ra.cksum; | |
1733 | while (ra.err == 0 && | |
1734 | NULL != (drr = restore_read(&ra, sizeof (*drr)))) { | |
1735 | if (issig(JUSTLOOKING) && issig(FORREAL)) { | |
2e528b49 | 1736 | ra.err = SET_ERROR(EINTR); |
34dc7c2f BB |
1737 | goto out; |
1738 | } | |
1739 | ||
1740 | if (ra.byteswap) | |
1741 | backup_byteswap(drr); | |
1742 | ||
1743 | switch (drr->drr_type) { | |
1744 | case DRR_OBJECT: | |
1745 | { | |
1746 | /* | |
1747 | * We need to make a copy of the record header, | |
1748 | * because restore_{object,write} may need to | |
1749 | * restore_read(), which will invalidate drr. | |
1750 | */ | |
1751 | struct drr_object drro = drr->drr_u.drr_object; | |
1752 | ra.err = restore_object(&ra, os, &drro); | |
1753 | break; | |
1754 | } | |
1755 | case DRR_FREEOBJECTS: | |
1756 | { | |
1757 | struct drr_freeobjects drrfo = | |
1758 | drr->drr_u.drr_freeobjects; | |
1759 | ra.err = restore_freeobjects(&ra, os, &drrfo); | |
1760 | break; | |
1761 | } | |
1762 | case DRR_WRITE: | |
1763 | { | |
1764 | struct drr_write drrw = drr->drr_u.drr_write; | |
1765 | ra.err = restore_write(&ra, os, &drrw); | |
1766 | break; | |
1767 | } | |
428870ff BB |
1768 | case DRR_WRITE_BYREF: |
1769 | { | |
1770 | struct drr_write_byref drrwbr = | |
1771 | drr->drr_u.drr_write_byref; | |
1772 | ra.err = restore_write_byref(&ra, os, &drrwbr); | |
1773 | break; | |
1774 | } | |
9b67f605 MA |
1775 | case DRR_WRITE_EMBEDDED: |
1776 | { | |
1777 | struct drr_write_embedded drrwe = | |
1778 | drr->drr_u.drr_write_embedded; | |
1779 | ra.err = restore_write_embedded(&ra, os, &drrwe); | |
1780 | break; | |
1781 | } | |
34dc7c2f BB |
1782 | case DRR_FREE: |
1783 | { | |
1784 | struct drr_free drrf = drr->drr_u.drr_free; | |
1785 | ra.err = restore_free(&ra, os, &drrf); | |
1786 | break; | |
1787 | } | |
1788 | case DRR_END: | |
1789 | { | |
1790 | struct drr_end drre = drr->drr_u.drr_end; | |
1791 | /* | |
1792 | * We compare against the *previous* checksum | |
1793 | * value, because the stored checksum is of | |
1794 | * everything before the DRR_END record. | |
1795 | */ | |
1796 | if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum)) | |
2e528b49 | 1797 | ra.err = SET_ERROR(ECKSUM); |
34dc7c2f BB |
1798 | goto out; |
1799 | } | |
428870ff BB |
1800 | case DRR_SPILL: |
1801 | { | |
1802 | struct drr_spill drrs = drr->drr_u.drr_spill; | |
1803 | ra.err = restore_spill(&ra, os, &drrs); | |
1804 | break; | |
1805 | } | |
34dc7c2f | 1806 | default: |
2e528b49 | 1807 | ra.err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1808 | goto out; |
1809 | } | |
1810 | pcksum = ra.cksum; | |
1811 | } | |
1812 | ASSERT(ra.err != 0); | |
1813 | ||
1814 | out: | |
572e2857 BB |
1815 | if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) |
1816 | zfs_onexit_fd_rele(cleanup_fd); | |
1817 | ||
34dc7c2f BB |
1818 | if (ra.err != 0) { |
1819 | /* | |
45d1cae3 BB |
1820 | * destroy what we created, so we don't leave it in the |
1821 | * inconsistent restoring state. | |
34dc7c2f | 1822 | */ |
13fe0198 | 1823 | dmu_recv_cleanup_ds(drc); |
34dc7c2f BB |
1824 | } |
1825 | ||
00b46022 | 1826 | vmem_free(ra.buf, ra.bufsize); |
34dc7c2f BB |
1827 | *voffp = ra.voff; |
1828 | return (ra.err); | |
1829 | } | |
1830 | ||
34dc7c2f | 1831 | static int |
13fe0198 | 1832 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1833 | { |
13fe0198 MA |
1834 | dmu_recv_cookie_t *drc = arg; |
1835 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1836 | int error; | |
1837 | ||
1838 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
1839 | ||
1840 | if (!drc->drc_newfs) { | |
1841 | dsl_dataset_t *origin_head; | |
1842 | ||
1843 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
1844 | if (error != 0) | |
1845 | return (error); | |
19580676 MA |
1846 | if (drc->drc_force) { |
1847 | /* | |
1848 | * We will destroy any snapshots in tofs (i.e. before | |
1849 | * origin_head) that are after the origin (which is | |
1850 | * the snap before drc_ds, because drc_ds can not | |
1851 | * have any snaps of its own). | |
1852 | */ | |
1853 | uint64_t obj = origin_head->ds_phys->ds_prev_snap_obj; | |
1854 | while (obj != drc->drc_ds->ds_phys->ds_prev_snap_obj) { | |
1855 | dsl_dataset_t *snap; | |
1856 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
1857 | &snap); | |
1858 | if (error != 0) | |
1859 | return (error); | |
1860 | if (snap->ds_dir != origin_head->ds_dir) | |
1861 | error = SET_ERROR(EINVAL); | |
1862 | if (error == 0) { | |
1863 | error = dsl_destroy_snapshot_check_impl( | |
1864 | snap, B_FALSE); | |
1865 | } | |
1866 | obj = snap->ds_phys->ds_prev_snap_obj; | |
1867 | dsl_dataset_rele(snap, FTAG); | |
1868 | if (error != 0) | |
1869 | return (error); | |
1870 | } | |
1871 | } | |
13fe0198 | 1872 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, |
831baf06 | 1873 | origin_head, drc->drc_force, drc->drc_owner, tx); |
13fe0198 MA |
1874 | if (error != 0) { |
1875 | dsl_dataset_rele(origin_head, FTAG); | |
1876 | return (error); | |
1877 | } | |
1878 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
96c2e961 | 1879 | drc->drc_tosnap, tx, B_TRUE); |
13fe0198 MA |
1880 | dsl_dataset_rele(origin_head, FTAG); |
1881 | if (error != 0) | |
1882 | return (error); | |
34dc7c2f | 1883 | |
13fe0198 MA |
1884 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); |
1885 | } else { | |
1886 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
96c2e961 | 1887 | drc->drc_tosnap, tx, B_TRUE); |
13fe0198 MA |
1888 | } |
1889 | return (error); | |
34dc7c2f BB |
1890 | } |
1891 | ||
1892 | static void | |
13fe0198 | 1893 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1894 | { |
13fe0198 MA |
1895 | dmu_recv_cookie_t *drc = arg; |
1896 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1897 | ||
1898 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
1899 | tx, "snap=%s", drc->drc_tosnap); | |
1900 | ||
1901 | if (!drc->drc_newfs) { | |
1902 | dsl_dataset_t *origin_head; | |
1903 | ||
1904 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
1905 | &origin_head)); | |
19580676 MA |
1906 | |
1907 | if (drc->drc_force) { | |
1908 | /* | |
1909 | * Destroy any snapshots of drc_tofs (origin_head) | |
1910 | * after the origin (the snap before drc_ds). | |
1911 | */ | |
1912 | uint64_t obj = origin_head->ds_phys->ds_prev_snap_obj; | |
1913 | while (obj != drc->drc_ds->ds_phys->ds_prev_snap_obj) { | |
1914 | dsl_dataset_t *snap; | |
1915 | VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, | |
1916 | &snap)); | |
1917 | ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); | |
1918 | obj = snap->ds_phys->ds_prev_snap_obj; | |
1919 | dsl_destroy_snapshot_sync_impl(snap, | |
1920 | B_FALSE, tx); | |
1921 | dsl_dataset_rele(snap, FTAG); | |
1922 | } | |
1923 | } | |
1924 | VERIFY3P(drc->drc_ds->ds_prev, ==, | |
1925 | origin_head->ds_prev); | |
1926 | ||
13fe0198 MA |
1927 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, |
1928 | origin_head, tx); | |
1929 | dsl_dataset_snapshot_sync_impl(origin_head, | |
1930 | drc->drc_tosnap, tx); | |
1931 | ||
1932 | /* set snapshot's creation time and guid */ | |
1933 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
1934 | origin_head->ds_prev->ds_phys->ds_creation_time = | |
1935 | drc->drc_drrb->drr_creation_time; | |
1936 | origin_head->ds_prev->ds_phys->ds_guid = | |
1937 | drc->drc_drrb->drr_toguid; | |
1938 | origin_head->ds_prev->ds_phys->ds_flags &= | |
1939 | ~DS_FLAG_INCONSISTENT; | |
1940 | ||
1941 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
1942 | origin_head->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1943 | ||
1944 | dsl_dataset_rele(origin_head, FTAG); | |
1945 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
831baf06 KW |
1946 | |
1947 | if (drc->drc_owner != NULL) | |
1948 | VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); | |
13fe0198 MA |
1949 | } else { |
1950 | dsl_dataset_t *ds = drc->drc_ds; | |
34dc7c2f | 1951 | |
13fe0198 | 1952 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); |
34dc7c2f | 1953 | |
13fe0198 MA |
1954 | /* set snapshot's creation time and guid */ |
1955 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
1956 | ds->ds_prev->ds_phys->ds_creation_time = | |
1957 | drc->drc_drrb->drr_creation_time; | |
1958 | ds->ds_prev->ds_phys->ds_guid = drc->drc_drrb->drr_toguid; | |
1959 | ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
34dc7c2f | 1960 | |
13fe0198 MA |
1961 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
1962 | ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1963 | } | |
1964 | drc->drc_newsnapobj = drc->drc_ds->ds_phys->ds_prev_snap_obj; | |
1965 | /* | |
1966 | * Release the hold from dmu_recv_begin. This must be done before | |
1967 | * we return to open context, so that when we free the dataset's dnode, | |
1968 | * we can evict its bonus buffer. | |
1969 | */ | |
1970 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1971 | drc->drc_ds = NULL; | |
34dc7c2f BB |
1972 | } |
1973 | ||
8d35c149 | 1974 | static int |
13fe0198 | 1975 | add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) |
8d35c149 | 1976 | { |
13fe0198 | 1977 | dsl_pool_t *dp; |
8d35c149 AS |
1978 | dsl_dataset_t *snapds; |
1979 | guid_map_entry_t *gmep; | |
1980 | int err; | |
1981 | ||
1982 | ASSERT(guid_map != NULL); | |
1983 | ||
13fe0198 MA |
1984 | err = dsl_pool_hold(name, FTAG, &dp); |
1985 | if (err != 0) | |
1986 | return (err); | |
7ec09286 MA |
1987 | gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); |
1988 | err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); | |
8d35c149 | 1989 | if (err == 0) { |
8d35c149 AS |
1990 | gmep->guid = snapds->ds_phys->ds_guid; |
1991 | gmep->gme_ds = snapds; | |
1992 | avl_add(guid_map, gmep); | |
13fe0198 | 1993 | dsl_dataset_long_hold(snapds, gmep); |
7ec09286 MA |
1994 | } else { |
1995 | kmem_free(gmep, sizeof (*gmep)); | |
8d35c149 AS |
1996 | } |
1997 | ||
13fe0198 | 1998 | dsl_pool_rele(dp, FTAG); |
8d35c149 AS |
1999 | return (err); |
2000 | } | |
2001 | ||
13fe0198 MA |
2002 | static int dmu_recv_end_modified_blocks = 3; |
2003 | ||
428870ff BB |
2004 | static int |
2005 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
34dc7c2f | 2006 | { |
13fe0198 | 2007 | int error; |
34dc7c2f | 2008 | |
13fe0198 MA |
2009 | #ifdef _KERNEL |
2010 | char *name; | |
34dc7c2f | 2011 | |
13fe0198 MA |
2012 | /* |
2013 | * We will be destroying the ds; make sure its origin is unmounted if | |
2014 | * necessary. | |
2015 | */ | |
2016 | name = kmem_alloc(MAXNAMELEN, KM_SLEEP); | |
2017 | dsl_dataset_name(drc->drc_ds, name); | |
2018 | zfs_destroy_unmount_origin(name); | |
2019 | kmem_free(name, MAXNAMELEN); | |
2020 | #endif | |
34dc7c2f | 2021 | |
13fe0198 MA |
2022 | error = dsl_sync_task(drc->drc_tofs, |
2023 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
2024 | dmu_recv_end_modified_blocks); | |
2025 | ||
2026 | if (error != 0) | |
2027 | dmu_recv_cleanup_ds(drc); | |
2028 | return (error); | |
34dc7c2f | 2029 | } |
428870ff BB |
2030 | |
2031 | static int | |
2032 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
2033 | { | |
13fe0198 | 2034 | int error; |
428870ff | 2035 | |
13fe0198 MA |
2036 | error = dsl_sync_task(drc->drc_tofs, |
2037 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
2038 | dmu_recv_end_modified_blocks); | |
428870ff | 2039 | |
13fe0198 MA |
2040 | if (error != 0) { |
2041 | dmu_recv_cleanup_ds(drc); | |
2042 | } else if (drc->drc_guid_to_ds_map != NULL) { | |
2043 | (void) add_ds_to_guidmap(drc->drc_tofs, | |
2044 | drc->drc_guid_to_ds_map, | |
2045 | drc->drc_newsnapobj); | |
428870ff | 2046 | } |
13fe0198 | 2047 | return (error); |
428870ff BB |
2048 | } |
2049 | ||
2050 | int | |
831baf06 | 2051 | dmu_recv_end(dmu_recv_cookie_t *drc, void *owner) |
428870ff | 2052 | { |
831baf06 KW |
2053 | drc->drc_owner = owner; |
2054 | ||
13fe0198 | 2055 | if (drc->drc_newfs) |
428870ff | 2056 | return (dmu_recv_new_end(drc)); |
13fe0198 MA |
2057 | else |
2058 | return (dmu_recv_existing_end(drc)); | |
428870ff | 2059 | } |
ea97f8ce MA |
2060 | |
2061 | /* | |
2062 | * Return TRUE if this objset is currently being received into. | |
2063 | */ | |
2064 | boolean_t | |
2065 | dmu_objset_is_receiving(objset_t *os) | |
2066 | { | |
2067 | return (os->os_dsl_dataset != NULL && | |
2068 | os->os_dsl_dataset->ds_owner == dmu_recv_tag); | |
2069 | } | |
fd8febbd TF |
2070 | |
2071 | #if defined(_KERNEL) | |
2072 | module_param(zfs_send_corrupt_data, int, 0644); | |
2073 | MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data"); | |
2074 | #endif |