]>
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. |
a0bd735a | 27 | * Copyright (c) 2016 Actifio, Inc. All rights reserved. |
8d35c149 | 28 | */ |
34dc7c2f | 29 | |
34dc7c2f BB |
30 | #include <sys/dmu.h> |
31 | #include <sys/dmu_impl.h> | |
32 | #include <sys/dmu_tx.h> | |
33 | #include <sys/dbuf.h> | |
34 | #include <sys/dnode.h> | |
35 | #include <sys/zfs_context.h> | |
36 | #include <sys/dmu_objset.h> | |
37 | #include <sys/dmu_traverse.h> | |
38 | #include <sys/dsl_dataset.h> | |
39 | #include <sys/dsl_dir.h> | |
428870ff | 40 | #include <sys/dsl_prop.h> |
34dc7c2f BB |
41 | #include <sys/dsl_pool.h> |
42 | #include <sys/dsl_synctask.h> | |
044baf00 | 43 | #include <sys/spa_impl.h> |
34dc7c2f BB |
44 | #include <sys/zfs_ioctl.h> |
45 | #include <sys/zap.h> | |
46 | #include <sys/zio_checksum.h> | |
428870ff BB |
47 | #include <sys/zfs_znode.h> |
48 | #include <zfs_fletcher.h> | |
49 | #include <sys/avl.h> | |
50 | #include <sys/ddt.h> | |
572e2857 | 51 | #include <sys/zfs_onexit.h> |
13fe0198 MA |
52 | #include <sys/dmu_send.h> |
53 | #include <sys/dsl_destroy.h> | |
9b67f605 | 54 | #include <sys/blkptr.h> |
da536844 | 55 | #include <sys/dsl_bookmark.h> |
9b67f605 | 56 | #include <sys/zfeature.h> |
fcff0f35 | 57 | #include <sys/bqueue.h> |
a0bd735a | 58 | #include <sys/zvol.h> |
f74b821a | 59 | #include <sys/policy.h> |
34dc7c2f | 60 | |
330d06f9 MA |
61 | /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ |
62 | int zfs_send_corrupt_data = B_FALSE; | |
fcff0f35 PD |
63 | int zfs_send_queue_length = 16 * 1024 * 1024; |
64 | int zfs_recv_queue_length = 16 * 1024 * 1024; | |
330d06f9 | 65 | |
34dc7c2f | 66 | static char *dmu_recv_tag = "dmu_recv_tag"; |
13fe0198 | 67 | static const char *recv_clone_name = "%recv"; |
34dc7c2f | 68 | |
fcff0f35 PD |
69 | #define BP_SPAN(datablkszsec, indblkshift, level) \ |
70 | (((uint64_t)datablkszsec) << (SPA_MINBLOCKSHIFT + \ | |
71 | (level) * (indblkshift - SPA_BLKPTRSHIFT))) | |
72 | ||
73 | struct send_thread_arg { | |
74 | bqueue_t q; | |
75 | dsl_dataset_t *ds; /* Dataset to traverse */ | |
76 | uint64_t fromtxg; /* Traverse from this txg */ | |
77 | int flags; /* flags to pass to traverse_dataset */ | |
78 | int error_code; | |
79 | boolean_t cancel; | |
80 | }; | |
81 | ||
82 | struct send_block_record { | |
83 | boolean_t eos_marker; /* Marks the end of the stream */ | |
84 | blkptr_t bp; | |
85 | zbookmark_phys_t zb; | |
86 | uint8_t indblkshift; | |
87 | uint16_t datablkszsec; | |
88 | bqueue_node_t ln; | |
89 | }; | |
90 | ||
044baf00 BB |
91 | typedef struct dump_bytes_io { |
92 | dmu_sendarg_t *dbi_dsp; | |
93 | void *dbi_buf; | |
94 | int dbi_len; | |
95 | } dump_bytes_io_t; | |
96 | ||
97 | static void | |
b58986ee | 98 | dump_bytes_cb(void *arg) |
34dc7c2f | 99 | { |
044baf00 BB |
100 | dump_bytes_io_t *dbi = (dump_bytes_io_t *)arg; |
101 | dmu_sendarg_t *dsp = dbi->dbi_dsp; | |
37abac6d | 102 | dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset; |
34dc7c2f | 103 | ssize_t resid; /* have to get resid to get detailed errno */ |
c99c9001 | 104 | ASSERT0(dbi->dbi_len % 8); |
34dc7c2f | 105 | |
37abac6d | 106 | dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp, |
044baf00 | 107 | (caddr_t)dbi->dbi_buf, dbi->dbi_len, |
34dc7c2f | 108 | 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid); |
37abac6d BP |
109 | |
110 | mutex_enter(&ds->ds_sendstream_lock); | |
044baf00 | 111 | *dsp->dsa_off += dbi->dbi_len; |
37abac6d | 112 | mutex_exit(&ds->ds_sendstream_lock); |
044baf00 BB |
113 | } |
114 | ||
115 | static int | |
116 | dump_bytes(dmu_sendarg_t *dsp, void *buf, int len) | |
117 | { | |
118 | dump_bytes_io_t dbi; | |
119 | ||
120 | dbi.dbi_dsp = dsp; | |
121 | dbi.dbi_buf = buf; | |
122 | dbi.dbi_len = len; | |
123 | ||
b58986ee BB |
124 | #if defined(HAVE_LARGE_STACKS) |
125 | dump_bytes_cb(&dbi); | |
126 | #else | |
044baf00 BB |
127 | /* |
128 | * The vn_rdwr() call is performed in a taskq to ensure that there is | |
129 | * always enough stack space to write safely to the target filesystem. | |
130 | * The ZIO_TYPE_FREE threads are used because there can be a lot of | |
131 | * them and they are used in vdev_file.c for a similar purpose. | |
132 | */ | |
133 | spa_taskq_dispatch_sync(dmu_objset_spa(dsp->dsa_os), ZIO_TYPE_FREE, | |
b58986ee BB |
134 | ZIO_TASKQ_ISSUE, dump_bytes_cb, &dbi, TQ_SLEEP); |
135 | #endif /* HAVE_LARGE_STACKS */ | |
37abac6d BP |
136 | |
137 | return (dsp->dsa_err); | |
34dc7c2f BB |
138 | } |
139 | ||
37f8a883 MA |
140 | /* |
141 | * For all record types except BEGIN, fill in the checksum (overlaid in | |
142 | * drr_u.drr_checksum.drr_checksum). The checksum verifies everything | |
143 | * up to the start of the checksum itself. | |
144 | */ | |
145 | static int | |
146 | dump_record(dmu_sendarg_t *dsp, void *payload, int payload_len) | |
147 | { | |
148 | ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), | |
149 | ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); | |
150 | fletcher_4_incremental_native(dsp->dsa_drr, | |
151 | offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), | |
152 | &dsp->dsa_zc); | |
153 | if (dsp->dsa_drr->drr_type != DRR_BEGIN) { | |
154 | ASSERT(ZIO_CHECKSUM_IS_ZERO(&dsp->dsa_drr->drr_u. | |
155 | drr_checksum.drr_checksum)); | |
156 | dsp->dsa_drr->drr_u.drr_checksum.drr_checksum = dsp->dsa_zc; | |
157 | } | |
158 | fletcher_4_incremental_native(&dsp->dsa_drr-> | |
159 | drr_u.drr_checksum.drr_checksum, | |
160 | sizeof (zio_cksum_t), &dsp->dsa_zc); | |
161 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) | |
162 | return (SET_ERROR(EINTR)); | |
163 | if (payload_len != 0) { | |
164 | fletcher_4_incremental_native(payload, payload_len, | |
165 | &dsp->dsa_zc); | |
166 | if (dump_bytes(dsp, payload, payload_len) != 0) | |
167 | return (SET_ERROR(EINTR)); | |
168 | } | |
169 | return (0); | |
170 | } | |
171 | ||
34dc7c2f | 172 | static int |
37abac6d | 173 | dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, |
34dc7c2f BB |
174 | uint64_t length) |
175 | { | |
37abac6d | 176 | struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); |
428870ff | 177 | |
ea97f8ce MA |
178 | /* |
179 | * When we receive a free record, dbuf_free_range() assumes | |
180 | * that the receiving system doesn't have any dbufs in the range | |
181 | * being freed. This is always true because there is a one-record | |
182 | * constraint: we only send one WRITE record for any given | |
183 | * object+offset. We know that the one-record constraint is | |
184 | * true because we always send data in increasing order by | |
185 | * object,offset. | |
186 | * | |
187 | * If the increasing-order constraint ever changes, we should find | |
188 | * another way to assert that the one-record constraint is still | |
189 | * satisfied. | |
190 | */ | |
191 | ASSERT(object > dsp->dsa_last_data_object || | |
192 | (object == dsp->dsa_last_data_object && | |
193 | offset > dsp->dsa_last_data_offset)); | |
194 | ||
195 | /* | |
196 | * If we are doing a non-incremental send, then there can't | |
197 | * be any data in the dataset we're receiving into. Therefore | |
198 | * a free record would simply be a no-op. Save space by not | |
199 | * sending it to begin with. | |
200 | */ | |
201 | if (!dsp->dsa_incremental) | |
202 | return (0); | |
203 | ||
c578f007 SK |
204 | if (length != -1ULL && offset + length < offset) |
205 | length = -1ULL; | |
206 | ||
428870ff BB |
207 | /* |
208 | * If there is a pending op, but it's not PENDING_FREE, push it out, | |
209 | * since free block aggregation can only be done for blocks of the | |
210 | * same type (i.e., DRR_FREE records can only be aggregated with | |
211 | * other DRR_FREE records. DRR_FREEOBJECTS records can only be | |
212 | * aggregated with other DRR_FREEOBJECTS records. | |
213 | */ | |
37abac6d BP |
214 | if (dsp->dsa_pending_op != PENDING_NONE && |
215 | dsp->dsa_pending_op != PENDING_FREE) { | |
37f8a883 | 216 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 217 | return (SET_ERROR(EINTR)); |
37abac6d | 218 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
219 | } |
220 | ||
37abac6d | 221 | if (dsp->dsa_pending_op == PENDING_FREE) { |
428870ff BB |
222 | /* |
223 | * There should never be a PENDING_FREE if length is -1 | |
224 | * (because dump_dnode is the only place where this | |
225 | * function is called with a -1, and only after flushing | |
226 | * any pending record). | |
227 | */ | |
228 | ASSERT(length != -1ULL); | |
229 | /* | |
230 | * Check to see whether this free block can be aggregated | |
231 | * with pending one. | |
232 | */ | |
233 | if (drrf->drr_object == object && drrf->drr_offset + | |
234 | drrf->drr_length == offset) { | |
235 | drrf->drr_length += length; | |
236 | return (0); | |
237 | } else { | |
238 | /* not a continuation. Push out pending record */ | |
37f8a883 | 239 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 240 | return (SET_ERROR(EINTR)); |
37abac6d | 241 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
242 | } |
243 | } | |
244 | /* create a FREE record and make it pending */ | |
37abac6d BP |
245 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
246 | dsp->dsa_drr->drr_type = DRR_FREE; | |
428870ff BB |
247 | drrf->drr_object = object; |
248 | drrf->drr_offset = offset; | |
249 | drrf->drr_length = length; | |
37abac6d | 250 | drrf->drr_toguid = dsp->dsa_toguid; |
428870ff | 251 | if (length == -1ULL) { |
37f8a883 | 252 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 253 | return (SET_ERROR(EINTR)); |
428870ff | 254 | } else { |
37abac6d | 255 | dsp->dsa_pending_op = PENDING_FREE; |
428870ff | 256 | } |
34dc7c2f | 257 | |
34dc7c2f BB |
258 | return (0); |
259 | } | |
260 | ||
261 | static int | |
9b67f605 | 262 | dump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, |
428870ff | 263 | uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) |
34dc7c2f | 264 | { |
37abac6d | 265 | struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); |
428870ff | 266 | |
ea97f8ce MA |
267 | /* |
268 | * We send data in increasing object, offset order. | |
269 | * See comment in dump_free() for details. | |
270 | */ | |
271 | ASSERT(object > dsp->dsa_last_data_object || | |
272 | (object == dsp->dsa_last_data_object && | |
273 | offset > dsp->dsa_last_data_offset)); | |
274 | dsp->dsa_last_data_object = object; | |
275 | dsp->dsa_last_data_offset = offset + blksz - 1; | |
428870ff BB |
276 | |
277 | /* | |
278 | * If there is any kind of pending aggregation (currently either | |
279 | * a grouping of free objects or free blocks), push it out to | |
280 | * the stream, since aggregation can't be done across operations | |
281 | * of different types. | |
282 | */ | |
37abac6d | 283 | if (dsp->dsa_pending_op != PENDING_NONE) { |
37f8a883 | 284 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 285 | return (SET_ERROR(EINTR)); |
37abac6d | 286 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 287 | } |
37f8a883 | 288 | /* write a WRITE record */ |
37abac6d BP |
289 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
290 | dsp->dsa_drr->drr_type = DRR_WRITE; | |
428870ff BB |
291 | drrw->drr_object = object; |
292 | drrw->drr_type = type; | |
293 | drrw->drr_offset = offset; | |
294 | drrw->drr_length = blksz; | |
37abac6d | 295 | drrw->drr_toguid = dsp->dsa_toguid; |
f1512ee6 | 296 | if (bp == NULL || BP_IS_EMBEDDED(bp)) { |
9b67f605 | 297 | /* |
f1512ee6 MA |
298 | * There's no pre-computed checksum for partial-block |
299 | * writes or embedded BP's, so (like | |
300 | * fletcher4-checkummed blocks) userland will have to | |
301 | * compute a dedup-capable checksum itself. | |
9b67f605 MA |
302 | */ |
303 | drrw->drr_checksumtype = ZIO_CHECKSUM_OFF; | |
304 | } else { | |
305 | drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); | |
306 | if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup) | |
307 | drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; | |
308 | DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); | |
309 | DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); | |
310 | DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); | |
311 | drrw->drr_key.ddk_cksum = bp->blk_cksum; | |
312 | } | |
428870ff | 313 | |
37f8a883 | 314 | if (dump_record(dsp, data, blksz) != 0) |
2e528b49 | 315 | return (SET_ERROR(EINTR)); |
428870ff BB |
316 | return (0); |
317 | } | |
318 | ||
9b67f605 MA |
319 | static int |
320 | dump_write_embedded(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, | |
321 | int blksz, const blkptr_t *bp) | |
322 | { | |
323 | char buf[BPE_PAYLOAD_SIZE]; | |
324 | struct drr_write_embedded *drrw = | |
325 | &(dsp->dsa_drr->drr_u.drr_write_embedded); | |
326 | ||
327 | if (dsp->dsa_pending_op != PENDING_NONE) { | |
37f8a883 | 328 | if (dump_record(dsp, NULL, 0) != 0) |
9b67f605 MA |
329 | return (EINTR); |
330 | dsp->dsa_pending_op = PENDING_NONE; | |
331 | } | |
332 | ||
333 | ASSERT(BP_IS_EMBEDDED(bp)); | |
334 | ||
335 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); | |
336 | dsp->dsa_drr->drr_type = DRR_WRITE_EMBEDDED; | |
337 | drrw->drr_object = object; | |
338 | drrw->drr_offset = offset; | |
339 | drrw->drr_length = blksz; | |
340 | drrw->drr_toguid = dsp->dsa_toguid; | |
341 | drrw->drr_compression = BP_GET_COMPRESS(bp); | |
342 | drrw->drr_etype = BPE_GET_ETYPE(bp); | |
343 | drrw->drr_lsize = BPE_GET_LSIZE(bp); | |
344 | drrw->drr_psize = BPE_GET_PSIZE(bp); | |
345 | ||
346 | decode_embedded_bp_compressed(bp, buf); | |
347 | ||
37f8a883 | 348 | if (dump_record(dsp, buf, P2ROUNDUP(drrw->drr_psize, 8)) != 0) |
9b67f605 MA |
349 | return (EINTR); |
350 | return (0); | |
351 | } | |
352 | ||
428870ff | 353 | static int |
37abac6d | 354 | dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) |
428870ff | 355 | { |
37abac6d | 356 | struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); |
428870ff | 357 | |
37abac6d | 358 | if (dsp->dsa_pending_op != PENDING_NONE) { |
37f8a883 | 359 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 360 | return (SET_ERROR(EINTR)); |
37abac6d | 361 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
362 | } |
363 | ||
364 | /* write a SPILL record */ | |
37abac6d BP |
365 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
366 | dsp->dsa_drr->drr_type = DRR_SPILL; | |
428870ff BB |
367 | drrs->drr_object = object; |
368 | drrs->drr_length = blksz; | |
37abac6d | 369 | drrs->drr_toguid = dsp->dsa_toguid; |
34dc7c2f | 370 | |
37f8a883 | 371 | if (dump_record(dsp, data, blksz) != 0) |
2e528b49 | 372 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
373 | return (0); |
374 | } | |
375 | ||
376 | static int | |
37abac6d | 377 | dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) |
34dc7c2f | 378 | { |
37abac6d | 379 | struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); |
428870ff | 380 | |
ea97f8ce MA |
381 | /* See comment in dump_free(). */ |
382 | if (!dsp->dsa_incremental) | |
383 | return (0); | |
384 | ||
428870ff BB |
385 | /* |
386 | * If there is a pending op, but it's not PENDING_FREEOBJECTS, | |
387 | * push it out, since free block aggregation can only be done for | |
388 | * blocks of the same type (i.e., DRR_FREE records can only be | |
389 | * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records | |
390 | * can only be aggregated with other DRR_FREEOBJECTS records. | |
391 | */ | |
37abac6d BP |
392 | if (dsp->dsa_pending_op != PENDING_NONE && |
393 | dsp->dsa_pending_op != PENDING_FREEOBJECTS) { | |
37f8a883 | 394 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 395 | return (SET_ERROR(EINTR)); |
37abac6d | 396 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 397 | } |
37abac6d | 398 | if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { |
428870ff BB |
399 | /* |
400 | * See whether this free object array can be aggregated | |
401 | * with pending one | |
402 | */ | |
403 | if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { | |
404 | drrfo->drr_numobjs += numobjs; | |
405 | return (0); | |
406 | } else { | |
407 | /* can't be aggregated. Push out pending record */ | |
37f8a883 | 408 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 409 | return (SET_ERROR(EINTR)); |
37abac6d | 410 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
411 | } |
412 | } | |
413 | ||
34dc7c2f | 414 | /* write a FREEOBJECTS record */ |
37abac6d BP |
415 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
416 | dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; | |
428870ff BB |
417 | drrfo->drr_firstobj = firstobj; |
418 | drrfo->drr_numobjs = numobjs; | |
37abac6d | 419 | drrfo->drr_toguid = dsp->dsa_toguid; |
428870ff | 420 | |
37abac6d | 421 | dsp->dsa_pending_op = PENDING_FREEOBJECTS; |
34dc7c2f | 422 | |
34dc7c2f BB |
423 | return (0); |
424 | } | |
425 | ||
426 | static int | |
37abac6d | 427 | dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) |
34dc7c2f | 428 | { |
37abac6d | 429 | struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); |
428870ff | 430 | |
34dc7c2f | 431 | if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) |
37abac6d | 432 | return (dump_freeobjects(dsp, object, 1)); |
34dc7c2f | 433 | |
37abac6d | 434 | if (dsp->dsa_pending_op != PENDING_NONE) { |
37f8a883 | 435 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 436 | return (SET_ERROR(EINTR)); |
37abac6d | 437 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
438 | } |
439 | ||
34dc7c2f | 440 | /* write an OBJECT record */ |
37abac6d BP |
441 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
442 | dsp->dsa_drr->drr_type = DRR_OBJECT; | |
428870ff BB |
443 | drro->drr_object = object; |
444 | drro->drr_type = dnp->dn_type; | |
445 | drro->drr_bonustype = dnp->dn_bonustype; | |
446 | drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
447 | drro->drr_bonuslen = dnp->dn_bonuslen; | |
448 | drro->drr_checksumtype = dnp->dn_checksum; | |
449 | drro->drr_compress = dnp->dn_compress; | |
37abac6d | 450 | drro->drr_toguid = dsp->dsa_toguid; |
428870ff | 451 | |
f1512ee6 MA |
452 | if (!(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && |
453 | drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE) | |
454 | drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE; | |
455 | ||
37f8a883 MA |
456 | if (dump_record(dsp, DN_BONUS(dnp), |
457 | P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) { | |
2e528b49 | 458 | return (SET_ERROR(EINTR)); |
37f8a883 | 459 | } |
34dc7c2f | 460 | |
ea97f8ce | 461 | /* Free anything past the end of the file. */ |
37abac6d | 462 | if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * |
ea97f8ce | 463 | (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL) != 0) |
2e528b49 | 464 | return (SET_ERROR(EINTR)); |
13fe0198 | 465 | if (dsp->dsa_err != 0) |
2e528b49 | 466 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
467 | return (0); |
468 | } | |
469 | ||
9b67f605 MA |
470 | static boolean_t |
471 | backup_do_embed(dmu_sendarg_t *dsp, const blkptr_t *bp) | |
472 | { | |
473 | if (!BP_IS_EMBEDDED(bp)) | |
474 | return (B_FALSE); | |
475 | ||
476 | /* | |
477 | * Compression function must be legacy, or explicitly enabled. | |
478 | */ | |
479 | if ((BP_GET_COMPRESS(bp) >= ZIO_COMPRESS_LEGACY_FUNCTIONS && | |
480 | !(dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4))) | |
481 | return (B_FALSE); | |
482 | ||
483 | /* | |
484 | * Embed type must be explicitly enabled. | |
485 | */ | |
486 | switch (BPE_GET_ETYPE(bp)) { | |
487 | case BP_EMBEDDED_TYPE_DATA: | |
488 | if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) | |
489 | return (B_TRUE); | |
490 | break; | |
491 | default: | |
492 | return (B_FALSE); | |
493 | } | |
494 | return (B_FALSE); | |
495 | } | |
496 | ||
fcff0f35 PD |
497 | /* |
498 | * This is the callback function to traverse_dataset that acts as the worker | |
499 | * thread for dmu_send_impl. | |
500 | */ | |
501 | /*ARGSUSED*/ | |
502 | static int | |
503 | send_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, | |
504 | const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg) | |
505 | { | |
506 | struct send_thread_arg *sta = arg; | |
507 | struct send_block_record *record; | |
508 | uint64_t record_size; | |
509 | int err = 0; | |
510 | ||
511 | if (sta->cancel) | |
512 | return (SET_ERROR(EINTR)); | |
34dc7c2f | 513 | |
fcff0f35 PD |
514 | if (bp == NULL) { |
515 | ASSERT3U(zb->zb_level, ==, ZB_DNODE_LEVEL); | |
516 | return (0); | |
517 | } else if (zb->zb_level < 0) { | |
518 | return (0); | |
519 | } | |
520 | ||
521 | record = kmem_zalloc(sizeof (struct send_block_record), KM_SLEEP); | |
522 | record->eos_marker = B_FALSE; | |
523 | record->bp = *bp; | |
524 | record->zb = *zb; | |
525 | record->indblkshift = dnp->dn_indblkshift; | |
526 | record->datablkszsec = dnp->dn_datablkszsec; | |
527 | record_size = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
528 | bqueue_enqueue(&sta->q, record, record_size); | |
529 | ||
530 | return (err); | |
531 | } | |
532 | ||
533 | /* | |
534 | * This function kicks off the traverse_dataset. It also handles setting the | |
535 | * error code of the thread in case something goes wrong, and pushes the End of | |
536 | * Stream record when the traverse_dataset call has finished. If there is no | |
537 | * dataset to traverse, the thread immediately pushes End of Stream marker. | |
538 | */ | |
539 | static void | |
540 | send_traverse_thread(void *arg) | |
541 | { | |
542 | struct send_thread_arg *st_arg = arg; | |
543 | int err; | |
544 | struct send_block_record *data; | |
545 | ||
546 | if (st_arg->ds != NULL) { | |
547 | err = traverse_dataset(st_arg->ds, st_arg->fromtxg, | |
548 | st_arg->flags, send_cb, arg); | |
549 | if (err != EINTR) | |
550 | st_arg->error_code = err; | |
551 | } | |
552 | data = kmem_zalloc(sizeof (*data), KM_SLEEP); | |
553 | data->eos_marker = B_TRUE; | |
554 | bqueue_enqueue(&st_arg->q, data, 1); | |
555 | } | |
556 | ||
557 | /* | |
558 | * This function actually handles figuring out what kind of record needs to be | |
559 | * dumped, reading the data (which has hopefully been prefetched), and calling | |
560 | * the appropriate helper function. | |
561 | */ | |
34dc7c2f | 562 | static int |
fcff0f35 | 563 | do_dump(dmu_sendarg_t *dsa, struct send_block_record *data) |
34dc7c2f | 564 | { |
fcff0f35 PD |
565 | dsl_dataset_t *ds = dmu_objset_ds(dsa->dsa_os); |
566 | const blkptr_t *bp = &data->bp; | |
567 | const zbookmark_phys_t *zb = &data->zb; | |
568 | uint8_t indblkshift = data->indblkshift; | |
569 | uint16_t dblkszsec = data->datablkszsec; | |
570 | spa_t *spa = ds->ds_dir->dd_pool->dp_spa; | |
34dc7c2f | 571 | dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; |
34dc7c2f | 572 | int err = 0; |
fcff0f35 PD |
573 | dnode_phys_t *blk; |
574 | uint64_t dnobj; | |
34dc7c2f | 575 | |
fcff0f35 | 576 | ASSERT3U(zb->zb_level, >=, 0); |
34dc7c2f | 577 | |
428870ff BB |
578 | if (zb->zb_object != DMU_META_DNODE_OBJECT && |
579 | DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { | |
9babb374 | 580 | return (0); |
b0bc7a84 MG |
581 | } else if (BP_IS_HOLE(bp) && |
582 | zb->zb_object == DMU_META_DNODE_OBJECT) { | |
fcff0f35 | 583 | uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); |
b128c09f | 584 | uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; |
fcff0f35 | 585 | err = dump_freeobjects(dsa, dnobj, span >> DNODE_SHIFT); |
b0bc7a84 | 586 | } else if (BP_IS_HOLE(bp)) { |
fcff0f35 PD |
587 | uint64_t span = BP_SPAN(dblkszsec, indblkshift, zb->zb_level); |
588 | uint64_t offset = zb->zb_blkid * span; | |
589 | err = dump_free(dsa, zb->zb_object, offset, span); | |
b128c09f BB |
590 | } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { |
591 | return (0); | |
592 | } else if (type == DMU_OT_DNODE) { | |
34dc7c2f | 593 | int blksz = BP_GET_LSIZE(bp); |
2a432414 | 594 | arc_flags_t aflags = ARC_FLAG_WAIT; |
b128c09f | 595 | arc_buf_t *abuf; |
fcff0f35 PD |
596 | int i; |
597 | ||
598 | ASSERT0(zb->zb_level); | |
b128c09f | 599 | |
294f6806 GW |
600 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
601 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
602 | &aflags, zb) != 0) | |
2e528b49 | 603 | return (SET_ERROR(EIO)); |
34dc7c2f | 604 | |
b128c09f | 605 | blk = abuf->b_data; |
fcff0f35 | 606 | dnobj = zb->zb_blkid * (blksz >> DNODE_SHIFT); |
34dc7c2f | 607 | for (i = 0; i < blksz >> DNODE_SHIFT; i++) { |
fcff0f35 | 608 | err = dump_dnode(dsa, dnobj + i, blk + i); |
13fe0198 | 609 | if (err != 0) |
34dc7c2f BB |
610 | break; |
611 | } | |
b128c09f | 612 | (void) arc_buf_remove_ref(abuf, &abuf); |
428870ff | 613 | } else if (type == DMU_OT_SA) { |
2a432414 | 614 | arc_flags_t aflags = ARC_FLAG_WAIT; |
b128c09f | 615 | arc_buf_t *abuf; |
34dc7c2f | 616 | int blksz = BP_GET_LSIZE(bp); |
b128c09f | 617 | |
294f6806 GW |
618 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
619 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
620 | &aflags, zb) != 0) | |
2e528b49 | 621 | return (SET_ERROR(EIO)); |
b128c09f | 622 | |
fcff0f35 | 623 | err = dump_spill(dsa, zb->zb_object, blksz, abuf->b_data); |
428870ff | 624 | (void) arc_buf_remove_ref(abuf, &abuf); |
fcff0f35 | 625 | } else if (backup_do_embed(dsa, bp)) { |
9b67f605 | 626 | /* it's an embedded level-0 block of a regular object */ |
fcff0f35 PD |
627 | int blksz = dblkszsec << SPA_MINBLOCKSHIFT; |
628 | ASSERT0(zb->zb_level); | |
629 | err = dump_write_embedded(dsa, zb->zb_object, | |
9b67f605 | 630 | zb->zb_blkid * blksz, blksz, bp); |
fcff0f35 PD |
631 | } else { |
632 | /* it's a level-0 block of a regular object */ | |
2a432414 | 633 | arc_flags_t aflags = ARC_FLAG_WAIT; |
428870ff | 634 | arc_buf_t *abuf; |
fcff0f35 PD |
635 | int blksz = dblkszsec << SPA_MINBLOCKSHIFT; |
636 | uint64_t offset; | |
428870ff | 637 | |
da536844 | 638 | ASSERT0(zb->zb_level); |
294f6806 GW |
639 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
640 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
641 | &aflags, zb) != 0) { | |
330d06f9 MA |
642 | if (zfs_send_corrupt_data) { |
643 | uint64_t *ptr; | |
644 | /* Send a block filled with 0x"zfs badd bloc" */ | |
645 | abuf = arc_buf_alloc(spa, blksz, &abuf, | |
646 | ARC_BUFC_DATA); | |
647 | for (ptr = abuf->b_data; | |
648 | (char *)ptr < (char *)abuf->b_data + blksz; | |
649 | ptr++) | |
dd26aa53 | 650 | *ptr = 0x2f5baddb10cULL; |
330d06f9 | 651 | } else { |
2e528b49 | 652 | return (SET_ERROR(EIO)); |
330d06f9 MA |
653 | } |
654 | } | |
428870ff | 655 | |
f1512ee6 MA |
656 | offset = zb->zb_blkid * blksz; |
657 | ||
fcff0f35 | 658 | if (!(dsa->dsa_featureflags & |
f1512ee6 MA |
659 | DMU_BACKUP_FEATURE_LARGE_BLOCKS) && |
660 | blksz > SPA_OLD_MAXBLOCKSIZE) { | |
661 | char *buf = abuf->b_data; | |
662 | while (blksz > 0 && err == 0) { | |
663 | int n = MIN(blksz, SPA_OLD_MAXBLOCKSIZE); | |
fcff0f35 | 664 | err = dump_write(dsa, type, zb->zb_object, |
f1512ee6 MA |
665 | offset, n, NULL, buf); |
666 | offset += n; | |
667 | buf += n; | |
668 | blksz -= n; | |
669 | } | |
670 | } else { | |
fcff0f35 | 671 | err = dump_write(dsa, type, zb->zb_object, |
f1512ee6 MA |
672 | offset, blksz, bp, abuf->b_data); |
673 | } | |
b128c09f | 674 | (void) arc_buf_remove_ref(abuf, &abuf); |
34dc7c2f BB |
675 | } |
676 | ||
677 | ASSERT(err == 0 || err == EINTR); | |
678 | return (err); | |
679 | } | |
680 | ||
6f1ffb06 | 681 | /* |
fcff0f35 PD |
682 | * Pop the new data off the queue, and free the old data. |
683 | */ | |
684 | static struct send_block_record * | |
685 | get_next_record(bqueue_t *bq, struct send_block_record *data) | |
686 | { | |
687 | struct send_block_record *tmp = bqueue_dequeue(bq); | |
688 | kmem_free(data, sizeof (*data)); | |
689 | return (tmp); | |
690 | } | |
691 | ||
692 | /* | |
693 | * Actually do the bulk of the work in a zfs send. | |
694 | * | |
695 | * Note: Releases dp using the specified tag. | |
6f1ffb06 | 696 | */ |
13fe0198 | 697 | static int |
fcff0f35 PD |
698 | dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *to_ds, |
699 | zfs_bookmark_phys_t *ancestor_zb, boolean_t is_clone, boolean_t embedok, | |
f1512ee6 | 700 | boolean_t large_block_ok, int outfd, vnode_t *vp, offset_t *off) |
34dc7c2f | 701 | { |
13fe0198 | 702 | objset_t *os; |
34dc7c2f | 703 | dmu_replay_record_t *drr; |
37abac6d | 704 | dmu_sendarg_t *dsp; |
34dc7c2f BB |
705 | int err; |
706 | uint64_t fromtxg = 0; | |
9b67f605 | 707 | uint64_t featureflags = 0; |
fcff0f35 PD |
708 | struct send_thread_arg to_arg; |
709 | struct send_block_record *to_data; | |
34dc7c2f | 710 | |
fcff0f35 | 711 | err = dmu_objset_from_ds(to_ds, &os); |
13fe0198 | 712 | if (err != 0) { |
13fe0198 MA |
713 | dsl_pool_rele(dp, tag); |
714 | return (err); | |
715 | } | |
34dc7c2f | 716 | |
34dc7c2f BB |
717 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
718 | drr->drr_type = DRR_BEGIN; | |
719 | drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
428870ff BB |
720 | DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, |
721 | DMU_SUBSTREAM); | |
722 | ||
723 | #ifdef _KERNEL | |
13fe0198 | 724 | if (dmu_objset_type(os) == DMU_OST_ZFS) { |
428870ff | 725 | uint64_t version; |
13fe0198 | 726 | if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { |
37abac6d | 727 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
13fe0198 | 728 | dsl_pool_rele(dp, tag); |
2e528b49 | 729 | return (SET_ERROR(EINVAL)); |
37abac6d | 730 | } |
13fe0198 | 731 | if (version >= ZPL_VERSION_SA) { |
9b67f605 | 732 | featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; |
428870ff BB |
733 | } |
734 | } | |
735 | #endif | |
736 | ||
fcff0f35 | 737 | if (large_block_ok && to_ds->ds_feature_inuse[SPA_FEATURE_LARGE_BLOCKS]) |
f1512ee6 | 738 | featureflags |= DMU_BACKUP_FEATURE_LARGE_BLOCKS; |
9b67f605 MA |
739 | if (embedok && |
740 | spa_feature_is_active(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) { | |
741 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA; | |
742 | if (spa_feature_is_active(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) | |
743 | featureflags |= DMU_BACKUP_FEATURE_EMBED_DATA_LZ4; | |
9b67f605 MA |
744 | } |
745 | ||
746 | DMU_SET_FEATUREFLAGS(drr->drr_u.drr_begin.drr_versioninfo, | |
747 | featureflags); | |
748 | ||
34dc7c2f | 749 | drr->drr_u.drr_begin.drr_creation_time = |
fcff0f35 | 750 | dsl_dataset_phys(to_ds)->ds_creation_time; |
13fe0198 | 751 | drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); |
da536844 | 752 | if (is_clone) |
34dc7c2f | 753 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; |
fcff0f35 PD |
754 | drr->drr_u.drr_begin.drr_toguid = dsl_dataset_phys(to_ds)->ds_guid; |
755 | if (dsl_dataset_phys(to_ds)->ds_flags & DS_FLAG_CI_DATASET) | |
34dc7c2f BB |
756 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; |
757 | ||
fcff0f35 PD |
758 | if (ancestor_zb != NULL) { |
759 | drr->drr_u.drr_begin.drr_fromguid = | |
760 | ancestor_zb->zbm_guid; | |
761 | fromtxg = ancestor_zb->zbm_creation_txg; | |
da536844 | 762 | } |
fcff0f35 PD |
763 | dsl_dataset_name(to_ds, drr->drr_u.drr_begin.drr_toname); |
764 | if (!to_ds->ds_is_snapshot) { | |
da536844 MA |
765 | (void) strlcat(drr->drr_u.drr_begin.drr_toname, "@--head--", |
766 | sizeof (drr->drr_u.drr_begin.drr_toname)); | |
13fe0198 | 767 | } |
34dc7c2f | 768 | |
37abac6d BP |
769 | dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); |
770 | ||
771 | dsp->dsa_drr = drr; | |
772 | dsp->dsa_vp = vp; | |
773 | dsp->dsa_outfd = outfd; | |
774 | dsp->dsa_proc = curproc; | |
13fe0198 | 775 | dsp->dsa_os = os; |
37abac6d | 776 | dsp->dsa_off = off; |
fcff0f35 | 777 | dsp->dsa_toguid = dsl_dataset_phys(to_ds)->ds_guid; |
37abac6d | 778 | dsp->dsa_pending_op = PENDING_NONE; |
fcff0f35 | 779 | dsp->dsa_incremental = (ancestor_zb != NULL); |
9b67f605 | 780 | dsp->dsa_featureflags = featureflags; |
37abac6d | 781 | |
fcff0f35 PD |
782 | mutex_enter(&to_ds->ds_sendstream_lock); |
783 | list_insert_head(&to_ds->ds_sendstreams, dsp); | |
784 | mutex_exit(&to_ds->ds_sendstream_lock); | |
37abac6d | 785 | |
fcff0f35 | 786 | dsl_dataset_long_hold(to_ds, FTAG); |
7ec09286 MA |
787 | dsl_pool_rele(dp, tag); |
788 | ||
37f8a883 | 789 | if (dump_record(dsp, NULL, 0) != 0) { |
37abac6d BP |
790 | err = dsp->dsa_err; |
791 | goto out; | |
34dc7c2f BB |
792 | } |
793 | ||
fcff0f35 PD |
794 | err = bqueue_init(&to_arg.q, zfs_send_queue_length, |
795 | offsetof(struct send_block_record, ln)); | |
796 | to_arg.error_code = 0; | |
797 | to_arg.cancel = B_FALSE; | |
798 | to_arg.ds = to_ds; | |
799 | to_arg.fromtxg = fromtxg; | |
800 | to_arg.flags = TRAVERSE_PRE | TRAVERSE_PREFETCH; | |
801 | (void) thread_create(NULL, 0, send_traverse_thread, &to_arg, 0, curproc, | |
802 | TS_RUN, minclsyspri); | |
803 | ||
804 | to_data = bqueue_dequeue(&to_arg.q); | |
805 | ||
806 | while (!to_data->eos_marker && err == 0) { | |
807 | err = do_dump(dsp, to_data); | |
808 | to_data = get_next_record(&to_arg.q, to_data); | |
809 | if (issig(JUSTLOOKING) && issig(FORREAL)) | |
810 | err = EINTR; | |
811 | } | |
812 | ||
813 | if (err != 0) { | |
814 | to_arg.cancel = B_TRUE; | |
815 | while (!to_data->eos_marker) { | |
816 | to_data = get_next_record(&to_arg.q, to_data); | |
817 | } | |
818 | } | |
819 | kmem_free(to_data, sizeof (*to_data)); | |
820 | ||
821 | bqueue_destroy(&to_arg.q); | |
822 | ||
823 | if (err == 0 && to_arg.error_code != 0) | |
824 | err = to_arg.error_code; | |
825 | ||
826 | if (err != 0) | |
827 | goto out; | |
34dc7c2f | 828 | |
37abac6d | 829 | if (dsp->dsa_pending_op != PENDING_NONE) |
37f8a883 | 830 | if (dump_record(dsp, NULL, 0) != 0) |
2e528b49 | 831 | err = SET_ERROR(EINTR); |
428870ff | 832 | |
13fe0198 MA |
833 | if (err != 0) { |
834 | if (err == EINTR && dsp->dsa_err != 0) | |
37abac6d BP |
835 | err = dsp->dsa_err; |
836 | goto out; | |
34dc7c2f BB |
837 | } |
838 | ||
839 | bzero(drr, sizeof (dmu_replay_record_t)); | |
840 | drr->drr_type = DRR_END; | |
37abac6d BP |
841 | drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; |
842 | drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; | |
34dc7c2f | 843 | |
fcff0f35 | 844 | if (dump_record(dsp, NULL, 0) != 0) |
37abac6d | 845 | err = dsp->dsa_err; |
34dc7c2f | 846 | |
37abac6d | 847 | out: |
fcff0f35 PD |
848 | mutex_enter(&to_ds->ds_sendstream_lock); |
849 | list_remove(&to_ds->ds_sendstreams, dsp); | |
850 | mutex_exit(&to_ds->ds_sendstream_lock); | |
37abac6d | 851 | |
34dc7c2f | 852 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
37abac6d | 853 | kmem_free(dsp, sizeof (dmu_sendarg_t)); |
34dc7c2f | 854 | |
fcff0f35 | 855 | dsl_dataset_long_rele(to_ds, FTAG); |
13fe0198 | 856 | |
37abac6d | 857 | return (err); |
34dc7c2f BB |
858 | } |
859 | ||
330d06f9 | 860 | int |
13fe0198 | 861 | dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, |
f1512ee6 MA |
862 | boolean_t embedok, boolean_t large_block_ok, |
863 | int outfd, vnode_t *vp, offset_t *off) | |
13fe0198 MA |
864 | { |
865 | dsl_pool_t *dp; | |
866 | dsl_dataset_t *ds; | |
867 | dsl_dataset_t *fromds = NULL; | |
868 | int err; | |
869 | ||
870 | err = dsl_pool_hold(pool, FTAG, &dp); | |
871 | if (err != 0) | |
872 | return (err); | |
873 | ||
874 | err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); | |
875 | if (err != 0) { | |
876 | dsl_pool_rele(dp, FTAG); | |
877 | return (err); | |
878 | } | |
879 | ||
880 | if (fromsnap != 0) { | |
da536844 MA |
881 | zfs_bookmark_phys_t zb; |
882 | boolean_t is_clone; | |
883 | ||
13fe0198 MA |
884 | err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); |
885 | if (err != 0) { | |
886 | dsl_dataset_rele(ds, FTAG); | |
887 | dsl_pool_rele(dp, FTAG); | |
888 | return (err); | |
889 | } | |
da536844 MA |
890 | if (!dsl_dataset_is_before(ds, fromds, 0)) |
891 | err = SET_ERROR(EXDEV); | |
d683ddbb JG |
892 | zb.zbm_creation_time = |
893 | dsl_dataset_phys(fromds)->ds_creation_time; | |
894 | zb.zbm_creation_txg = dsl_dataset_phys(fromds)->ds_creation_txg; | |
895 | zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; | |
da536844 MA |
896 | is_clone = (fromds->ds_dir != ds->ds_dir); |
897 | dsl_dataset_rele(fromds, FTAG); | |
f1512ee6 MA |
898 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, |
899 | embedok, large_block_ok, outfd, vp, off); | |
da536844 | 900 | } else { |
f1512ee6 MA |
901 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, |
902 | embedok, large_block_ok, outfd, vp, off); | |
13fe0198 | 903 | } |
da536844 MA |
904 | dsl_dataset_rele(ds, FTAG); |
905 | return (err); | |
13fe0198 MA |
906 | } |
907 | ||
908 | int | |
f1512ee6 MA |
909 | dmu_send(const char *tosnap, const char *fromsnap, |
910 | boolean_t embedok, boolean_t large_block_ok, | |
13fe0198 MA |
911 | int outfd, vnode_t *vp, offset_t *off) |
912 | { | |
913 | dsl_pool_t *dp; | |
914 | dsl_dataset_t *ds; | |
13fe0198 | 915 | int err; |
da536844 | 916 | boolean_t owned = B_FALSE; |
13fe0198 | 917 | |
da536844 | 918 | if (fromsnap != NULL && strpbrk(fromsnap, "@#") == NULL) |
2e528b49 | 919 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
920 | |
921 | err = dsl_pool_hold(tosnap, FTAG, &dp); | |
922 | if (err != 0) | |
923 | return (err); | |
924 | ||
da536844 MA |
925 | if (strchr(tosnap, '@') == NULL && spa_writeable(dp->dp_spa)) { |
926 | /* | |
927 | * We are sending a filesystem or volume. Ensure | |
928 | * that it doesn't change by owning the dataset. | |
929 | */ | |
930 | err = dsl_dataset_own(dp, tosnap, FTAG, &ds); | |
931 | owned = B_TRUE; | |
932 | } else { | |
933 | err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); | |
934 | } | |
13fe0198 MA |
935 | if (err != 0) { |
936 | dsl_pool_rele(dp, FTAG); | |
937 | return (err); | |
938 | } | |
939 | ||
940 | if (fromsnap != NULL) { | |
da536844 MA |
941 | zfs_bookmark_phys_t zb; |
942 | boolean_t is_clone = B_FALSE; | |
943 | int fsnamelen = strchr(tosnap, '@') - tosnap; | |
944 | ||
945 | /* | |
946 | * If the fromsnap is in a different filesystem, then | |
947 | * mark the send stream as a clone. | |
948 | */ | |
949 | if (strncmp(tosnap, fromsnap, fsnamelen) != 0 || | |
950 | (fromsnap[fsnamelen] != '@' && | |
951 | fromsnap[fsnamelen] != '#')) { | |
952 | is_clone = B_TRUE; | |
953 | } | |
954 | ||
955 | if (strchr(fromsnap, '@')) { | |
956 | dsl_dataset_t *fromds; | |
957 | err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); | |
958 | if (err == 0) { | |
959 | if (!dsl_dataset_is_before(ds, fromds, 0)) | |
960 | err = SET_ERROR(EXDEV); | |
961 | zb.zbm_creation_time = | |
d683ddbb | 962 | dsl_dataset_phys(fromds)->ds_creation_time; |
da536844 | 963 | zb.zbm_creation_txg = |
d683ddbb JG |
964 | dsl_dataset_phys(fromds)->ds_creation_txg; |
965 | zb.zbm_guid = dsl_dataset_phys(fromds)->ds_guid; | |
da536844 MA |
966 | is_clone = (ds->ds_dir != fromds->ds_dir); |
967 | dsl_dataset_rele(fromds, FTAG); | |
968 | } | |
969 | } else { | |
970 | err = dsl_bookmark_lookup(dp, fromsnap, ds, &zb); | |
971 | } | |
13fe0198 MA |
972 | if (err != 0) { |
973 | dsl_dataset_rele(ds, FTAG); | |
974 | dsl_pool_rele(dp, FTAG); | |
975 | return (err); | |
976 | } | |
f1512ee6 MA |
977 | err = dmu_send_impl(FTAG, dp, ds, &zb, is_clone, |
978 | embedok, large_block_ok, outfd, vp, off); | |
da536844 | 979 | } else { |
f1512ee6 MA |
980 | err = dmu_send_impl(FTAG, dp, ds, NULL, B_FALSE, |
981 | embedok, large_block_ok, outfd, vp, off); | |
13fe0198 | 982 | } |
da536844 MA |
983 | if (owned) |
984 | dsl_dataset_disown(ds, FTAG); | |
985 | else | |
986 | dsl_dataset_rele(ds, FTAG); | |
987 | return (err); | |
13fe0198 MA |
988 | } |
989 | ||
5dc8b736 MG |
990 | static int |
991 | dmu_adjust_send_estimate_for_indirects(dsl_dataset_t *ds, uint64_t size, | |
992 | uint64_t *sizep) | |
993 | { | |
994 | int err; | |
995 | /* | |
996 | * Assume that space (both on-disk and in-stream) is dominated by | |
997 | * data. We will adjust for indirect blocks and the copies property, | |
998 | * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). | |
999 | */ | |
1000 | ||
1001 | /* | |
1002 | * Subtract out approximate space used by indirect blocks. | |
1003 | * Assume most space is used by data blocks (non-indirect, non-dnode). | |
1004 | * Assume all blocks are recordsize. Assume ditto blocks and | |
1005 | * internal fragmentation counter out compression. | |
1006 | * | |
1007 | * Therefore, space used by indirect blocks is sizeof(blkptr_t) per | |
1008 | * block, which we observe in practice. | |
1009 | */ | |
1010 | uint64_t recordsize; | |
1011 | err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); | |
1012 | if (err != 0) | |
1013 | return (err); | |
1014 | size -= size / recordsize * sizeof (blkptr_t); | |
1015 | ||
1016 | /* Add in the space for the record associated with each block. */ | |
1017 | size += size / recordsize * sizeof (dmu_replay_record_t); | |
1018 | ||
1019 | *sizep = size; | |
1020 | ||
1021 | return (0); | |
1022 | } | |
1023 | ||
13fe0198 MA |
1024 | int |
1025 | dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) | |
330d06f9 | 1026 | { |
330d06f9 | 1027 | int err; |
5dc8b736 | 1028 | uint64_t size; |
13fe0198 | 1029 | |
fd0fd646 | 1030 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
330d06f9 MA |
1031 | |
1032 | /* tosnap must be a snapshot */ | |
0c66c32d | 1033 | if (!ds->ds_is_snapshot) |
2e528b49 | 1034 | return (SET_ERROR(EINVAL)); |
330d06f9 | 1035 | |
71e2fe41 AG |
1036 | /* fromsnap, if provided, must be a snapshot */ |
1037 | if (fromds != NULL && !fromds->ds_is_snapshot) | |
1038 | return (SET_ERROR(EINVAL)); | |
1039 | ||
6f1ffb06 MA |
1040 | /* |
1041 | * fromsnap must be an earlier snapshot from the same fs as tosnap, | |
1042 | * or the origin's fs. | |
1043 | */ | |
da536844 | 1044 | if (fromds != NULL && !dsl_dataset_is_before(ds, fromds, 0)) |
2e528b49 | 1045 | return (SET_ERROR(EXDEV)); |
330d06f9 | 1046 | |
330d06f9 MA |
1047 | /* Get uncompressed size estimate of changed data. */ |
1048 | if (fromds == NULL) { | |
d683ddbb | 1049 | size = dsl_dataset_phys(ds)->ds_uncompressed_bytes; |
330d06f9 MA |
1050 | } else { |
1051 | uint64_t used, comp; | |
1052 | err = dsl_dataset_space_written(fromds, ds, | |
1053 | &used, &comp, &size); | |
13fe0198 | 1054 | if (err != 0) |
330d06f9 MA |
1055 | return (err); |
1056 | } | |
1057 | ||
5dc8b736 MG |
1058 | err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); |
1059 | return (err); | |
1060 | } | |
330d06f9 | 1061 | |
5dc8b736 MG |
1062 | /* |
1063 | * Simple callback used to traverse the blocks of a snapshot and sum their | |
1064 | * uncompressed size | |
1065 | */ | |
1066 | /* ARGSUSED */ | |
1067 | static int | |
1068 | dmu_calculate_send_traversal(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, | |
1069 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) | |
1070 | { | |
1071 | uint64_t *spaceptr = arg; | |
1072 | if (bp != NULL && !BP_IS_HOLE(bp)) { | |
1073 | *spaceptr += BP_GET_UCSIZE(bp); | |
1074 | } | |
1075 | return (0); | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * Given a desination snapshot and a TXG, calculate the approximate size of a | |
1080 | * send stream sent from that TXG. from_txg may be zero, indicating that the | |
1081 | * whole snapshot will be sent. | |
1082 | */ | |
1083 | int | |
1084 | dmu_send_estimate_from_txg(dsl_dataset_t *ds, uint64_t from_txg, | |
1085 | uint64_t *sizep) | |
1086 | { | |
5dc8b736 MG |
1087 | int err; |
1088 | uint64_t size = 0; | |
1089 | ||
fd0fd646 | 1090 | ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool)); |
5dc8b736 MG |
1091 | |
1092 | /* tosnap must be a snapshot */ | |
1093 | if (!dsl_dataset_is_snapshot(ds)) | |
1094 | return (SET_ERROR(EINVAL)); | |
1095 | ||
1096 | /* verify that from_txg is before the provided snapshot was taken */ | |
1097 | if (from_txg >= dsl_dataset_phys(ds)->ds_creation_txg) { | |
1098 | return (SET_ERROR(EXDEV)); | |
1099 | } | |
330d06f9 | 1100 | /* |
5dc8b736 MG |
1101 | * traverse the blocks of the snapshot with birth times after |
1102 | * from_txg, summing their uncompressed size | |
330d06f9 | 1103 | */ |
5dc8b736 MG |
1104 | err = traverse_dataset(ds, from_txg, TRAVERSE_POST, |
1105 | dmu_calculate_send_traversal, &size); | |
1106 | if (err) | |
330d06f9 | 1107 | return (err); |
330d06f9 | 1108 | |
5dc8b736 MG |
1109 | err = dmu_adjust_send_estimate_for_indirects(ds, size, sizep); |
1110 | return (err); | |
330d06f9 MA |
1111 | } |
1112 | ||
13fe0198 MA |
1113 | typedef struct dmu_recv_begin_arg { |
1114 | const char *drba_origin; | |
1115 | dmu_recv_cookie_t *drba_cookie; | |
1116 | cred_t *drba_cred; | |
19580676 | 1117 | uint64_t drba_snapobj; |
13fe0198 | 1118 | } dmu_recv_begin_arg_t; |
34dc7c2f | 1119 | |
34dc7c2f | 1120 | static int |
13fe0198 MA |
1121 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, |
1122 | uint64_t fromguid) | |
34dc7c2f | 1123 | { |
34dc7c2f | 1124 | uint64_t val; |
13fe0198 MA |
1125 | int error; |
1126 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
34dc7c2f | 1127 | |
13fe0198 MA |
1128 | /* temporary clone name must not exist */ |
1129 | error = zap_lookup(dp->dp_meta_objset, | |
d683ddbb | 1130 | dsl_dir_phys(ds->ds_dir)->dd_child_dir_zapobj, recv_clone_name, |
13fe0198 MA |
1131 | 8, 1, &val); |
1132 | if (error != ENOENT) | |
1133 | return (error == 0 ? EBUSY : error); | |
1134 | ||
572e2857 | 1135 | /* new snapshot name must not exist */ |
13fe0198 | 1136 | error = zap_lookup(dp->dp_meta_objset, |
d683ddbb JG |
1137 | dsl_dataset_phys(ds)->ds_snapnames_zapobj, |
1138 | drba->drba_cookie->drc_tosnap, 8, 1, &val); | |
13fe0198 MA |
1139 | if (error != ENOENT) |
1140 | return (error == 0 ? EEXIST : error); | |
572e2857 | 1141 | |
788eb90c JJ |
1142 | /* |
1143 | * Check snapshot limit before receiving. We'll recheck again at the | |
1144 | * end, but might as well abort before receiving if we're already over | |
1145 | * the limit. | |
1146 | * | |
1147 | * Note that we do not check the file system limit with | |
1148 | * dsl_dir_fscount_check because the temporary %clones don't count | |
1149 | * against that limit. | |
1150 | */ | |
1151 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, ZFS_PROP_SNAPSHOT_LIMIT, | |
1152 | NULL, drba->drba_cred); | |
1153 | if (error != 0) | |
1154 | return (error); | |
1155 | ||
13fe0198 | 1156 | if (fromguid != 0) { |
19580676 | 1157 | dsl_dataset_t *snap; |
d683ddbb | 1158 | uint64_t obj = dsl_dataset_phys(ds)->ds_prev_snap_obj; |
19580676 MA |
1159 | |
1160 | /* Find snapshot in this dir that matches fromguid. */ | |
1161 | while (obj != 0) { | |
1162 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
1163 | &snap); | |
1164 | if (error != 0) | |
1165 | return (SET_ERROR(ENODEV)); | |
1166 | if (snap->ds_dir != ds->ds_dir) { | |
1167 | dsl_dataset_rele(snap, FTAG); | |
1168 | return (SET_ERROR(ENODEV)); | |
1169 | } | |
d683ddbb | 1170 | if (dsl_dataset_phys(snap)->ds_guid == fromguid) |
19580676 | 1171 | break; |
d683ddbb | 1172 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
1173 | dsl_dataset_rele(snap, FTAG); |
1174 | } | |
1175 | if (obj == 0) | |
2e528b49 | 1176 | return (SET_ERROR(ENODEV)); |
34dc7c2f | 1177 | |
19580676 MA |
1178 | if (drba->drba_cookie->drc_force) { |
1179 | drba->drba_snapobj = obj; | |
1180 | } else { | |
1181 | /* | |
1182 | * If we are not forcing, there must be no | |
1183 | * changes since fromsnap. | |
1184 | */ | |
1185 | if (dsl_dataset_modified_since_snap(ds, snap)) { | |
428870ff | 1186 | dsl_dataset_rele(snap, FTAG); |
19580676 | 1187 | return (SET_ERROR(ETXTBSY)); |
428870ff | 1188 | } |
19580676 | 1189 | drba->drba_snapobj = ds->ds_prev->ds_object; |
428870ff | 1190 | } |
19580676 MA |
1191 | |
1192 | dsl_dataset_rele(snap, FTAG); | |
428870ff | 1193 | } else { |
cf50a2b0 AG |
1194 | /* if full, then must be forced */ |
1195 | if (!drba->drba_cookie->drc_force) | |
1196 | return (SET_ERROR(EEXIST)); | |
1197 | /* start from $ORIGIN@$ORIGIN, if supported */ | |
1198 | drba->drba_snapobj = dp->dp_origin_snap != NULL ? | |
1199 | dp->dp_origin_snap->ds_object : 0; | |
428870ff | 1200 | } |
34dc7c2f | 1201 | |
34dc7c2f | 1202 | return (0); |
13fe0198 MA |
1203 | |
1204 | } | |
1205 | ||
1206 | static int | |
1207 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
1208 | { | |
1209 | dmu_recv_begin_arg_t *drba = arg; | |
1210 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1211 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1212 | uint64_t fromguid = drrb->drr_fromguid; | |
1213 | int flags = drrb->drr_flags; | |
1214 | int error; | |
9b67f605 | 1215 | uint64_t featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
13fe0198 MA |
1216 | dsl_dataset_t *ds; |
1217 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1218 | ||
1219 | /* already checked */ | |
1220 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
1221 | ||
1222 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
1223 | DMU_COMPOUNDSTREAM || | |
1224 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
1225 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
2e528b49 | 1226 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1227 | |
1228 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
9b67f605 MA |
1229 | if ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) && |
1230 | spa_version(dp->dp_spa) < SPA_VERSION_SA) | |
1231 | return (SET_ERROR(ENOTSUP)); | |
1232 | ||
1233 | /* | |
1234 | * The receiving code doesn't know how to translate a WRITE_EMBEDDED | |
1235 | * record to a plan WRITE record, so the pool must have the | |
1236 | * EMBEDDED_DATA feature enabled if the stream has WRITE_EMBEDDED | |
1237 | * records. Same with WRITE_EMBEDDED records that use LZ4 compression. | |
1238 | */ | |
1239 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA) && | |
1240 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_EMBEDDED_DATA)) | |
1241 | return (SET_ERROR(ENOTSUP)); | |
1242 | if ((featureflags & DMU_BACKUP_FEATURE_EMBED_DATA_LZ4) && | |
1243 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LZ4_COMPRESS)) | |
2e528b49 | 1244 | return (SET_ERROR(ENOTSUP)); |
13fe0198 | 1245 | |
f1512ee6 MA |
1246 | /* |
1247 | * The receiving code doesn't know how to translate large blocks | |
1248 | * to smaller ones, so the pool must have the LARGE_BLOCKS | |
1249 | * feature enabled if the stream has LARGE_BLOCKS. | |
1250 | */ | |
1251 | if ((featureflags & DMU_BACKUP_FEATURE_LARGE_BLOCKS) && | |
1252 | !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_LARGE_BLOCKS)) | |
1253 | return (SET_ERROR(ENOTSUP)); | |
1254 | ||
13fe0198 MA |
1255 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1256 | if (error == 0) { | |
1257 | /* target fs already exists; recv into temp clone */ | |
1258 | ||
1259 | /* Can't recv a clone into an existing fs */ | |
1260 | if (flags & DRR_FLAG_CLONE) { | |
1261 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1262 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
1263 | } |
1264 | ||
1265 | error = recv_begin_check_existing_impl(drba, ds, fromguid); | |
1266 | dsl_dataset_rele(ds, FTAG); | |
1267 | } else if (error == ENOENT) { | |
1268 | /* target fs does not exist; must be a full backup or clone */ | |
1269 | char buf[MAXNAMELEN]; | |
1270 | ||
1271 | /* | |
1272 | * If it's a non-clone incremental, we are missing the | |
1273 | * target fs, so fail the recv. | |
1274 | */ | |
fcff0f35 PD |
1275 | if (fromguid != 0 && !(flags & DRR_FLAG_CLONE || |
1276 | drba->drba_origin)) | |
2e528b49 | 1277 | return (SET_ERROR(ENOENT)); |
13fe0198 MA |
1278 | |
1279 | /* Open the parent of tofs */ | |
1280 | ASSERT3U(strlen(tofs), <, MAXNAMELEN); | |
1281 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); | |
1282 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); | |
1283 | if (error != 0) | |
1284 | return (error); | |
1285 | ||
788eb90c JJ |
1286 | /* |
1287 | * Check filesystem and snapshot limits before receiving. We'll | |
1288 | * recheck snapshot limits again at the end (we create the | |
1289 | * filesystems and increment those counts during begin_sync). | |
1290 | */ | |
1291 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
1292 | ZFS_PROP_FILESYSTEM_LIMIT, NULL, drba->drba_cred); | |
1293 | if (error != 0) { | |
1294 | dsl_dataset_rele(ds, FTAG); | |
1295 | return (error); | |
1296 | } | |
1297 | ||
1298 | error = dsl_fs_ss_limit_check(ds->ds_dir, 1, | |
1299 | ZFS_PROP_SNAPSHOT_LIMIT, NULL, drba->drba_cred); | |
1300 | if (error != 0) { | |
1301 | dsl_dataset_rele(ds, FTAG); | |
1302 | return (error); | |
1303 | } | |
1304 | ||
13fe0198 MA |
1305 | if (drba->drba_origin != NULL) { |
1306 | dsl_dataset_t *origin; | |
1307 | error = dsl_dataset_hold(dp, drba->drba_origin, | |
1308 | FTAG, &origin); | |
1309 | if (error != 0) { | |
1310 | dsl_dataset_rele(ds, FTAG); | |
1311 | return (error); | |
1312 | } | |
0c66c32d | 1313 | if (!origin->ds_is_snapshot) { |
13fe0198 MA |
1314 | dsl_dataset_rele(origin, FTAG); |
1315 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1316 | return (SET_ERROR(EINVAL)); |
13fe0198 | 1317 | } |
d683ddbb | 1318 | if (dsl_dataset_phys(origin)->ds_guid != fromguid) { |
13fe0198 MA |
1319 | dsl_dataset_rele(origin, FTAG); |
1320 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 1321 | return (SET_ERROR(ENODEV)); |
13fe0198 MA |
1322 | } |
1323 | dsl_dataset_rele(origin, FTAG); | |
1324 | } | |
1325 | dsl_dataset_rele(ds, FTAG); | |
1326 | error = 0; | |
1327 | } | |
1328 | return (error); | |
34dc7c2f BB |
1329 | } |
1330 | ||
34dc7c2f | 1331 | static void |
13fe0198 | 1332 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1333 | { |
13fe0198 MA |
1334 | dmu_recv_begin_arg_t *drba = arg; |
1335 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1336 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
1337 | const char *tofs = drba->drba_cookie->drc_tofs; | |
1338 | dsl_dataset_t *ds, *newds; | |
34dc7c2f | 1339 | uint64_t dsobj; |
13fe0198 MA |
1340 | int error; |
1341 | uint64_t crflags; | |
1342 | ||
1343 | crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? | |
1344 | DS_FLAG_CI_DATASET : 0; | |
34dc7c2f | 1345 | |
13fe0198 MA |
1346 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
1347 | if (error == 0) { | |
1348 | /* create temporary clone */ | |
19580676 MA |
1349 | dsl_dataset_t *snap = NULL; |
1350 | if (drba->drba_snapobj != 0) { | |
1351 | VERIFY0(dsl_dataset_hold_obj(dp, | |
1352 | drba->drba_snapobj, FTAG, &snap)); | |
1353 | } | |
13fe0198 | 1354 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, |
19580676 | 1355 | snap, crflags, drba->drba_cred, tx); |
6b42ea85 PD |
1356 | if (drba->drba_snapobj != 0) |
1357 | dsl_dataset_rele(snap, FTAG); | |
13fe0198 MA |
1358 | dsl_dataset_rele(ds, FTAG); |
1359 | } else { | |
1360 | dsl_dir_t *dd; | |
1361 | const char *tail; | |
1362 | dsl_dataset_t *origin = NULL; | |
1363 | ||
1364 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
1365 | ||
1366 | if (drba->drba_origin != NULL) { | |
1367 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
1368 | FTAG, &origin)); | |
1369 | } | |
1370 | ||
1371 | /* Create new dataset. */ | |
1372 | dsobj = dsl_dataset_create_sync(dd, | |
1373 | strrchr(tofs, '/') + 1, | |
1374 | origin, crflags, drba->drba_cred, tx); | |
1375 | if (origin != NULL) | |
1376 | dsl_dataset_rele(origin, FTAG); | |
1377 | dsl_dir_rele(dd, FTAG); | |
1378 | drba->drba_cookie->drc_newfs = B_TRUE; | |
1379 | } | |
1380 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); | |
1381 | ||
1382 | dmu_buf_will_dirty(newds->ds_dbuf, tx); | |
d683ddbb | 1383 | dsl_dataset_phys(newds)->ds_flags |= DS_FLAG_INCONSISTENT; |
34dc7c2f | 1384 | |
428870ff BB |
1385 | /* |
1386 | * If we actually created a non-clone, we need to create the | |
1387 | * objset in our new dataset. | |
1388 | */ | |
13fe0198 | 1389 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { |
428870ff | 1390 | (void) dmu_objset_create_impl(dp->dp_spa, |
13fe0198 | 1391 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); |
428870ff | 1392 | } |
34dc7c2f | 1393 | |
13fe0198 | 1394 | drba->drba_cookie->drc_ds = newds; |
428870ff | 1395 | |
13fe0198 | 1396 | spa_history_log_internal_ds(newds, "receive", tx, ""); |
34dc7c2f BB |
1397 | } |
1398 | ||
34dc7c2f BB |
1399 | /* |
1400 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
1401 | * succeeds; otherwise we will leak the holds on the datasets. | |
1402 | */ | |
1403 | int | |
13fe0198 MA |
1404 | dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, |
1405 | boolean_t force, char *origin, dmu_recv_cookie_t *drc) | |
34dc7c2f | 1406 | { |
13fe0198 MA |
1407 | dmu_recv_begin_arg_t drba = { 0 }; |
1408 | dmu_replay_record_t *drr; | |
34dc7c2f BB |
1409 | |
1410 | bzero(drc, sizeof (dmu_recv_cookie_t)); | |
1411 | drc->drc_drrb = drrb; | |
1412 | drc->drc_tosnap = tosnap; | |
13fe0198 | 1413 | drc->drc_tofs = tofs; |
34dc7c2f | 1414 | drc->drc_force = force; |
788eb90c | 1415 | drc->drc_cred = CRED(); |
34dc7c2f | 1416 | |
13fe0198 MA |
1417 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) |
1418 | drc->drc_byteswap = B_TRUE; | |
1419 | else if (drrb->drr_magic != DMU_BACKUP_MAGIC) | |
2e528b49 | 1420 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1421 | |
13fe0198 MA |
1422 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
1423 | drr->drr_type = DRR_BEGIN; | |
1424 | drr->drr_u.drr_begin = *drc->drc_drrb; | |
1425 | if (drc->drc_byteswap) { | |
1426 | fletcher_4_incremental_byteswap(drr, | |
1427 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1428 | } else { | |
1429 | fletcher_4_incremental_native(drr, | |
1430 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
1431 | } | |
1432 | kmem_free(drr, sizeof (dmu_replay_record_t)); | |
428870ff | 1433 | |
13fe0198 MA |
1434 | if (drc->drc_byteswap) { |
1435 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
1436 | drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); | |
1437 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); | |
1438 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
1439 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
1440 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
34dc7c2f BB |
1441 | } |
1442 | ||
13fe0198 MA |
1443 | drba.drba_origin = origin; |
1444 | drba.drba_cookie = drc; | |
1445 | drba.drba_cred = CRED(); | |
1446 | ||
1447 | return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, | |
3d45fdd6 | 1448 | &drba, 5, ZFS_SPACE_CHECK_NORMAL)); |
34dc7c2f BB |
1449 | } |
1450 | ||
fcff0f35 PD |
1451 | struct receive_record_arg { |
1452 | dmu_replay_record_t header; | |
1453 | void *payload; /* Pointer to a buffer containing the payload */ | |
1454 | /* | |
1455 | * If the record is a write, pointer to the arc_buf_t containing the | |
1456 | * payload. | |
1457 | */ | |
1458 | arc_buf_t *write_buf; | |
1459 | int payload_size; | |
1460 | boolean_t eos_marker; /* Marks the end of the stream */ | |
1461 | bqueue_node_t node; | |
1462 | }; | |
1463 | ||
1464 | struct receive_writer_arg { | |
37f8a883 | 1465 | objset_t *os; |
13fe0198 | 1466 | boolean_t byteswap; |
fcff0f35 PD |
1467 | bqueue_t q; |
1468 | /* | |
1469 | * These three args are used to signal to the main thread that we're | |
1470 | * done. | |
1471 | */ | |
1472 | kmutex_t mutex; | |
1473 | kcondvar_t cv; | |
1474 | boolean_t done; | |
1475 | int err; | |
1476 | /* A map from guid to dataset to help handle dedup'd streams. */ | |
1477 | avl_tree_t *guid_to_ds_map; | |
1478 | }; | |
37f8a883 | 1479 | |
fcff0f35 PD |
1480 | struct receive_arg { |
1481 | objset_t *os; | |
1482 | vnode_t *vp; /* The vnode to read the stream from */ | |
1483 | uint64_t voff; /* The current offset in the stream */ | |
1484 | /* | |
1485 | * A record that has had its payload read in, but hasn't yet been handed | |
1486 | * off to the worker thread. | |
1487 | */ | |
1488 | struct receive_record_arg *rrd; | |
1489 | /* A record that has had its header read in, but not its payload. */ | |
1490 | struct receive_record_arg *next_rrd; | |
34dc7c2f | 1491 | zio_cksum_t cksum; |
37f8a883 | 1492 | zio_cksum_t prev_cksum; |
fcff0f35 PD |
1493 | int err; |
1494 | boolean_t byteswap; | |
1495 | /* Sorted list of objects not to issue prefetches for. */ | |
1496 | list_t ignore_obj_list; | |
1497 | }; | |
37f8a883 | 1498 | |
fcff0f35 PD |
1499 | struct receive_ign_obj_node { |
1500 | list_node_t node; | |
1501 | uint64_t object; | |
34dc7c2f BB |
1502 | }; |
1503 | ||
428870ff BB |
1504 | typedef struct guid_map_entry { |
1505 | uint64_t guid; | |
1506 | dsl_dataset_t *gme_ds; | |
1507 | avl_node_t avlnode; | |
1508 | } guid_map_entry_t; | |
1509 | ||
1510 | static int | |
1511 | guid_compare(const void *arg1, const void *arg2) | |
1512 | { | |
1513 | const guid_map_entry_t *gmep1 = arg1; | |
1514 | const guid_map_entry_t *gmep2 = arg2; | |
1515 | ||
1516 | if (gmep1->guid < gmep2->guid) | |
1517 | return (-1); | |
1518 | else if (gmep1->guid > gmep2->guid) | |
1519 | return (1); | |
1520 | return (0); | |
1521 | } | |
1522 | ||
572e2857 BB |
1523 | static void |
1524 | free_guid_map_onexit(void *arg) | |
1525 | { | |
1526 | avl_tree_t *ca = arg; | |
1527 | void *cookie = NULL; | |
1528 | guid_map_entry_t *gmep; | |
1529 | ||
1530 | while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { | |
13fe0198 | 1531 | dsl_dataset_long_rele(gmep->gme_ds, gmep); |
7ec09286 | 1532 | dsl_dataset_rele(gmep->gme_ds, gmep); |
572e2857 BB |
1533 | kmem_free(gmep, sizeof (guid_map_entry_t)); |
1534 | } | |
1535 | avl_destroy(ca); | |
1536 | kmem_free(ca, sizeof (avl_tree_t)); | |
1537 | } | |
1538 | ||
37f8a883 | 1539 | static int |
fcff0f35 | 1540 | receive_read(struct receive_arg *ra, int len, void *buf) |
34dc7c2f | 1541 | { |
34dc7c2f BB |
1542 | int done = 0; |
1543 | ||
1544 | /* some things will require 8-byte alignment, so everything must */ | |
c99c9001 | 1545 | ASSERT0(len % 8); |
34dc7c2f BB |
1546 | |
1547 | while (done < len) { | |
1548 | ssize_t resid; | |
1549 | ||
1550 | ra->err = vn_rdwr(UIO_READ, ra->vp, | |
37f8a883 | 1551 | (char *)buf + done, len - done, |
34dc7c2f BB |
1552 | ra->voff, UIO_SYSSPACE, FAPPEND, |
1553 | RLIM64_INFINITY, CRED(), &resid); | |
1554 | ||
1555 | if (resid == len - done) | |
2e528b49 | 1556 | ra->err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1557 | ra->voff += len - done - resid; |
1558 | done = len - resid; | |
13fe0198 | 1559 | if (ra->err != 0) |
37f8a883 | 1560 | return (ra->err); |
34dc7c2f BB |
1561 | } |
1562 | ||
1563 | ASSERT3U(done, ==, len); | |
37f8a883 | 1564 | return (0); |
34dc7c2f BB |
1565 | } |
1566 | ||
60948de1 | 1567 | noinline static void |
37f8a883 | 1568 | byteswap_record(dmu_replay_record_t *drr) |
34dc7c2f BB |
1569 | { |
1570 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
1571 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
1572 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1573 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
37f8a883 | 1574 | |
34dc7c2f BB |
1575 | switch (drr->drr_type) { |
1576 | case DRR_BEGIN: | |
1577 | DO64(drr_begin.drr_magic); | |
428870ff | 1578 | DO64(drr_begin.drr_versioninfo); |
34dc7c2f BB |
1579 | DO64(drr_begin.drr_creation_time); |
1580 | DO32(drr_begin.drr_type); | |
1581 | DO32(drr_begin.drr_flags); | |
1582 | DO64(drr_begin.drr_toguid); | |
1583 | DO64(drr_begin.drr_fromguid); | |
1584 | break; | |
1585 | case DRR_OBJECT: | |
1586 | DO64(drr_object.drr_object); | |
34dc7c2f BB |
1587 | DO32(drr_object.drr_type); |
1588 | DO32(drr_object.drr_bonustype); | |
1589 | DO32(drr_object.drr_blksz); | |
1590 | DO32(drr_object.drr_bonuslen); | |
428870ff | 1591 | DO64(drr_object.drr_toguid); |
34dc7c2f BB |
1592 | break; |
1593 | case DRR_FREEOBJECTS: | |
1594 | DO64(drr_freeobjects.drr_firstobj); | |
1595 | DO64(drr_freeobjects.drr_numobjs); | |
428870ff | 1596 | DO64(drr_freeobjects.drr_toguid); |
34dc7c2f BB |
1597 | break; |
1598 | case DRR_WRITE: | |
1599 | DO64(drr_write.drr_object); | |
1600 | DO32(drr_write.drr_type); | |
1601 | DO64(drr_write.drr_offset); | |
1602 | DO64(drr_write.drr_length); | |
428870ff | 1603 | DO64(drr_write.drr_toguid); |
37f8a883 | 1604 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write.drr_key.ddk_cksum); |
428870ff BB |
1605 | DO64(drr_write.drr_key.ddk_prop); |
1606 | break; | |
1607 | case DRR_WRITE_BYREF: | |
1608 | DO64(drr_write_byref.drr_object); | |
1609 | DO64(drr_write_byref.drr_offset); | |
1610 | DO64(drr_write_byref.drr_length); | |
1611 | DO64(drr_write_byref.drr_toguid); | |
1612 | DO64(drr_write_byref.drr_refguid); | |
1613 | DO64(drr_write_byref.drr_refobject); | |
1614 | DO64(drr_write_byref.drr_refoffset); | |
37f8a883 MA |
1615 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_write_byref. |
1616 | drr_key.ddk_cksum); | |
428870ff | 1617 | DO64(drr_write_byref.drr_key.ddk_prop); |
34dc7c2f | 1618 | break; |
9b67f605 MA |
1619 | case DRR_WRITE_EMBEDDED: |
1620 | DO64(drr_write_embedded.drr_object); | |
1621 | DO64(drr_write_embedded.drr_offset); | |
1622 | DO64(drr_write_embedded.drr_length); | |
1623 | DO64(drr_write_embedded.drr_toguid); | |
1624 | DO32(drr_write_embedded.drr_lsize); | |
1625 | DO32(drr_write_embedded.drr_psize); | |
1626 | break; | |
34dc7c2f BB |
1627 | case DRR_FREE: |
1628 | DO64(drr_free.drr_object); | |
1629 | DO64(drr_free.drr_offset); | |
1630 | DO64(drr_free.drr_length); | |
428870ff BB |
1631 | DO64(drr_free.drr_toguid); |
1632 | break; | |
1633 | case DRR_SPILL: | |
1634 | DO64(drr_spill.drr_object); | |
1635 | DO64(drr_spill.drr_length); | |
1636 | DO64(drr_spill.drr_toguid); | |
34dc7c2f BB |
1637 | break; |
1638 | case DRR_END: | |
428870ff | 1639 | DO64(drr_end.drr_toguid); |
37f8a883 | 1640 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_end.drr_checksum); |
34dc7c2f | 1641 | break; |
e75c13c3 BB |
1642 | default: |
1643 | break; | |
34dc7c2f | 1644 | } |
37f8a883 MA |
1645 | |
1646 | if (drr->drr_type != DRR_BEGIN) { | |
1647 | ZIO_CHECKSUM_BSWAP(&drr->drr_u.drr_checksum.drr_checksum); | |
1648 | } | |
1649 | ||
34dc7c2f BB |
1650 | #undef DO64 |
1651 | #undef DO32 | |
1652 | } | |
1653 | ||
6c59307a MA |
1654 | static inline uint8_t |
1655 | deduce_nblkptr(dmu_object_type_t bonus_type, uint64_t bonus_size) | |
1656 | { | |
1657 | if (bonus_type == DMU_OT_SA) { | |
1658 | return (1); | |
1659 | } else { | |
1660 | return (1 + | |
1661 | ((DN_MAX_BONUSLEN - bonus_size) >> SPA_BLKPTRSHIFT)); | |
1662 | } | |
1663 | } | |
1664 | ||
60948de1 | 1665 | noinline static int |
fcff0f35 PD |
1666 | receive_object(struct receive_writer_arg *rwa, struct drr_object *drro, |
1667 | void *data) | |
34dc7c2f | 1668 | { |
6c59307a | 1669 | dmu_object_info_t doi; |
34dc7c2f | 1670 | dmu_tx_t *tx; |
6c59307a MA |
1671 | uint64_t object; |
1672 | int err; | |
34dc7c2f | 1673 | |
34dc7c2f | 1674 | if (drro->drr_type == DMU_OT_NONE || |
9ae529ec CS |
1675 | !DMU_OT_IS_VALID(drro->drr_type) || |
1676 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
428870ff | 1677 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || |
34dc7c2f BB |
1678 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || |
1679 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
1680 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
fcff0f35 | 1681 | drro->drr_blksz > spa_maxblocksize(dmu_objset_spa(rwa->os)) || |
34dc7c2f | 1682 | drro->drr_bonuslen > DN_MAX_BONUSLEN) { |
2e528b49 | 1683 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1684 | } |
1685 | ||
fcff0f35 | 1686 | err = dmu_object_info(rwa->os, drro->drr_object, &doi); |
9babb374 BB |
1687 | |
1688 | if (err != 0 && err != ENOENT) | |
2e528b49 | 1689 | return (SET_ERROR(EINVAL)); |
6c59307a | 1690 | object = err == 0 ? drro->drr_object : DMU_NEW_OBJECT; |
9babb374 | 1691 | |
6c59307a MA |
1692 | /* |
1693 | * If we are losing blkptrs or changing the block size this must | |
1694 | * be a new file instance. We must clear out the previous file | |
1695 | * contents before we can change this type of metadata in the dnode. | |
1696 | */ | |
1697 | if (err == 0) { | |
1698 | int nblkptr; | |
1699 | ||
1700 | nblkptr = deduce_nblkptr(drro->drr_bonustype, | |
1701 | drro->drr_bonuslen); | |
1702 | ||
1703 | if (drro->drr_blksz != doi.doi_data_block_size || | |
1704 | nblkptr < doi.doi_nblkptr) { | |
fcff0f35 | 1705 | err = dmu_free_long_range(rwa->os, drro->drr_object, |
6c59307a MA |
1706 | 0, DMU_OBJECT_END); |
1707 | if (err != 0) | |
1708 | return (SET_ERROR(EINVAL)); | |
34dc7c2f | 1709 | } |
6c59307a MA |
1710 | } |
1711 | ||
fcff0f35 | 1712 | tx = dmu_tx_create(rwa->os); |
6c59307a MA |
1713 | dmu_tx_hold_bonus(tx, object); |
1714 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1715 | if (err != 0) { | |
1716 | dmu_tx_abort(tx); | |
1717 | return (err); | |
1718 | } | |
1719 | ||
1720 | if (object == DMU_NEW_OBJECT) { | |
1721 | /* currently free, want to be allocated */ | |
fcff0f35 | 1722 | err = dmu_object_claim(rwa->os, drro->drr_object, |
34dc7c2f BB |
1723 | drro->drr_type, drro->drr_blksz, |
1724 | drro->drr_bonustype, drro->drr_bonuslen, tx); | |
6c59307a MA |
1725 | } else if (drro->drr_type != doi.doi_type || |
1726 | drro->drr_blksz != doi.doi_data_block_size || | |
1727 | drro->drr_bonustype != doi.doi_bonus_type || | |
1728 | drro->drr_bonuslen != doi.doi_bonus_size) { | |
1729 | /* currently allocated, but with different properties */ | |
fcff0f35 | 1730 | err = dmu_object_reclaim(rwa->os, drro->drr_object, |
34dc7c2f | 1731 | drro->drr_type, drro->drr_blksz, |
6c59307a | 1732 | drro->drr_bonustype, drro->drr_bonuslen, tx); |
34dc7c2f | 1733 | } |
13fe0198 | 1734 | if (err != 0) { |
6c59307a | 1735 | dmu_tx_commit(tx); |
2e528b49 | 1736 | return (SET_ERROR(EINVAL)); |
428870ff | 1737 | } |
9babb374 | 1738 | |
fcff0f35 | 1739 | dmu_object_set_checksum(rwa->os, drro->drr_object, |
37f8a883 | 1740 | drro->drr_checksumtype, tx); |
fcff0f35 | 1741 | dmu_object_set_compress(rwa->os, drro->drr_object, |
37f8a883 | 1742 | drro->drr_compress, tx); |
34dc7c2f | 1743 | |
b128c09f | 1744 | if (data != NULL) { |
34dc7c2f | 1745 | dmu_buf_t *db; |
b128c09f | 1746 | |
fcff0f35 | 1747 | VERIFY0(dmu_bonus_hold(rwa->os, drro->drr_object, FTAG, &db)); |
34dc7c2f BB |
1748 | dmu_buf_will_dirty(db, tx); |
1749 | ||
1750 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
34dc7c2f | 1751 | bcopy(data, db->db_data, drro->drr_bonuslen); |
fcff0f35 | 1752 | if (rwa->byteswap) { |
9ae529ec CS |
1753 | dmu_object_byteswap_t byteswap = |
1754 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
1755 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
34dc7c2f BB |
1756 | drro->drr_bonuslen); |
1757 | } | |
1758 | dmu_buf_rele(db, FTAG); | |
1759 | } | |
1760 | dmu_tx_commit(tx); | |
1761 | return (0); | |
1762 | } | |
1763 | ||
1764 | /* ARGSUSED */ | |
60948de1 | 1765 | noinline static int |
fcff0f35 | 1766 | receive_freeobjects(struct receive_writer_arg *rwa, |
34dc7c2f BB |
1767 | struct drr_freeobjects *drrfo) |
1768 | { | |
1769 | uint64_t obj; | |
1770 | ||
1771 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
2e528b49 | 1772 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1773 | |
1774 | for (obj = drrfo->drr_firstobj; | |
1775 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs; | |
fcff0f35 | 1776 | (void) dmu_object_next(rwa->os, &obj, FALSE, 0)) { |
34dc7c2f BB |
1777 | int err; |
1778 | ||
fcff0f35 | 1779 | if (dmu_object_info(rwa->os, obj, NULL) != 0) |
34dc7c2f BB |
1780 | continue; |
1781 | ||
fcff0f35 | 1782 | err = dmu_free_long_object(rwa->os, obj); |
13fe0198 | 1783 | if (err != 0) |
34dc7c2f | 1784 | return (err); |
34dc7c2f BB |
1785 | } |
1786 | return (0); | |
1787 | } | |
1788 | ||
60948de1 | 1789 | noinline static int |
fcff0f35 PD |
1790 | receive_write(struct receive_writer_arg *rwa, struct drr_write *drrw, |
1791 | arc_buf_t *abuf) | |
34dc7c2f BB |
1792 | { |
1793 | dmu_tx_t *tx; | |
88904bb3 | 1794 | dmu_buf_t *bonus; |
34dc7c2f BB |
1795 | int err; |
1796 | ||
1797 | if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || | |
9ae529ec | 1798 | !DMU_OT_IS_VALID(drrw->drr_type)) |
2e528b49 | 1799 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1800 | |
fcff0f35 | 1801 | if (dmu_object_info(rwa->os, drrw->drr_object, NULL) != 0) |
88904bb3 MA |
1802 | return (SET_ERROR(EINVAL)); |
1803 | ||
fcff0f35 | 1804 | tx = dmu_tx_create(rwa->os); |
34dc7c2f BB |
1805 | |
1806 | dmu_tx_hold_write(tx, drrw->drr_object, | |
1807 | drrw->drr_offset, drrw->drr_length); | |
1808 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1809 | if (err != 0) { |
34dc7c2f BB |
1810 | dmu_tx_abort(tx); |
1811 | return (err); | |
1812 | } | |
fcff0f35 | 1813 | if (rwa->byteswap) { |
9ae529ec CS |
1814 | dmu_object_byteswap_t byteswap = |
1815 | DMU_OT_BYTESWAP(drrw->drr_type); | |
37f8a883 MA |
1816 | dmu_ot_byteswap[byteswap].ob_func(abuf->b_data, |
1817 | drrw->drr_length); | |
9ae529ec | 1818 | } |
37f8a883 | 1819 | |
fcff0f35 | 1820 | if (dmu_bonus_hold(rwa->os, drrw->drr_object, FTAG, &bonus) != 0) |
37f8a883 | 1821 | return (SET_ERROR(EINVAL)); |
88904bb3 | 1822 | dmu_assign_arcbuf(bonus, drrw->drr_offset, abuf, tx); |
34dc7c2f | 1823 | dmu_tx_commit(tx); |
88904bb3 | 1824 | dmu_buf_rele(bonus, FTAG); |
34dc7c2f BB |
1825 | return (0); |
1826 | } | |
1827 | ||
428870ff BB |
1828 | /* |
1829 | * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed | |
1830 | * streams to refer to a copy of the data that is already on the | |
1831 | * system because it came in earlier in the stream. This function | |
1832 | * finds the earlier copy of the data, and uses that copy instead of | |
1833 | * data from the stream to fulfill this write. | |
1834 | */ | |
1835 | static int | |
fcff0f35 PD |
1836 | receive_write_byref(struct receive_writer_arg *rwa, |
1837 | struct drr_write_byref *drrwbr) | |
428870ff BB |
1838 | { |
1839 | dmu_tx_t *tx; | |
1840 | int err; | |
1841 | guid_map_entry_t gmesrch; | |
1842 | guid_map_entry_t *gmep; | |
9b67f605 | 1843 | avl_index_t where; |
428870ff BB |
1844 | objset_t *ref_os = NULL; |
1845 | dmu_buf_t *dbp; | |
1846 | ||
1847 | if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) | |
2e528b49 | 1848 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1849 | |
1850 | /* | |
1851 | * If the GUID of the referenced dataset is different from the | |
1852 | * GUID of the target dataset, find the referenced dataset. | |
1853 | */ | |
1854 | if (drrwbr->drr_toguid != drrwbr->drr_refguid) { | |
1855 | gmesrch.guid = drrwbr->drr_refguid; | |
fcff0f35 | 1856 | if ((gmep = avl_find(rwa->guid_to_ds_map, &gmesrch, |
428870ff | 1857 | &where)) == NULL) { |
2e528b49 | 1858 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1859 | } |
1860 | if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) | |
2e528b49 | 1861 | return (SET_ERROR(EINVAL)); |
428870ff | 1862 | } else { |
fcff0f35 | 1863 | ref_os = rwa->os; |
428870ff BB |
1864 | } |
1865 | ||
c65aa5b2 BB |
1866 | err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, |
1867 | drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); | |
9b67f605 | 1868 | if (err != 0) |
428870ff BB |
1869 | return (err); |
1870 | ||
fcff0f35 | 1871 | tx = dmu_tx_create(rwa->os); |
428870ff BB |
1872 | |
1873 | dmu_tx_hold_write(tx, drrwbr->drr_object, | |
1874 | drrwbr->drr_offset, drrwbr->drr_length); | |
1875 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1876 | if (err != 0) { |
428870ff BB |
1877 | dmu_tx_abort(tx); |
1878 | return (err); | |
1879 | } | |
fcff0f35 | 1880 | dmu_write(rwa->os, drrwbr->drr_object, |
428870ff BB |
1881 | drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); |
1882 | dmu_buf_rele(dbp, FTAG); | |
1883 | dmu_tx_commit(tx); | |
1884 | return (0); | |
1885 | } | |
1886 | ||
9b67f605 | 1887 | static int |
fcff0f35 | 1888 | receive_write_embedded(struct receive_writer_arg *rwa, |
37f8a883 | 1889 | struct drr_write_embedded *drrwnp, void *data) |
9b67f605 MA |
1890 | { |
1891 | dmu_tx_t *tx; | |
1892 | int err; | |
9b67f605 MA |
1893 | |
1894 | if (drrwnp->drr_offset + drrwnp->drr_length < drrwnp->drr_offset) | |
1895 | return (EINVAL); | |
1896 | ||
1897 | if (drrwnp->drr_psize > BPE_PAYLOAD_SIZE) | |
1898 | return (EINVAL); | |
1899 | ||
1900 | if (drrwnp->drr_etype >= NUM_BP_EMBEDDED_TYPES) | |
1901 | return (EINVAL); | |
1902 | if (drrwnp->drr_compression >= ZIO_COMPRESS_FUNCTIONS) | |
1903 | return (EINVAL); | |
1904 | ||
fcff0f35 | 1905 | tx = dmu_tx_create(rwa->os); |
9b67f605 MA |
1906 | |
1907 | dmu_tx_hold_write(tx, drrwnp->drr_object, | |
1908 | drrwnp->drr_offset, drrwnp->drr_length); | |
1909 | err = dmu_tx_assign(tx, TXG_WAIT); | |
1910 | if (err != 0) { | |
1911 | dmu_tx_abort(tx); | |
1912 | return (err); | |
1913 | } | |
1914 | ||
fcff0f35 | 1915 | dmu_write_embedded(rwa->os, drrwnp->drr_object, |
9b67f605 MA |
1916 | drrwnp->drr_offset, data, drrwnp->drr_etype, |
1917 | drrwnp->drr_compression, drrwnp->drr_lsize, drrwnp->drr_psize, | |
fcff0f35 | 1918 | rwa->byteswap ^ ZFS_HOST_BYTEORDER, tx); |
9b67f605 MA |
1919 | |
1920 | dmu_tx_commit(tx); | |
1921 | return (0); | |
1922 | } | |
1923 | ||
428870ff | 1924 | static int |
fcff0f35 PD |
1925 | receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs, |
1926 | void *data) | |
428870ff BB |
1927 | { |
1928 | dmu_tx_t *tx; | |
428870ff BB |
1929 | dmu_buf_t *db, *db_spill; |
1930 | int err; | |
1931 | ||
1932 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
fcff0f35 | 1933 | drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os))) |
2e528b49 | 1934 | return (SET_ERROR(EINVAL)); |
428870ff | 1935 | |
fcff0f35 | 1936 | if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0) |
2e528b49 | 1937 | return (SET_ERROR(EINVAL)); |
428870ff | 1938 | |
fcff0f35 | 1939 | VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db)); |
428870ff BB |
1940 | if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { |
1941 | dmu_buf_rele(db, FTAG); | |
1942 | return (err); | |
1943 | } | |
1944 | ||
fcff0f35 | 1945 | tx = dmu_tx_create(rwa->os); |
428870ff BB |
1946 | |
1947 | dmu_tx_hold_spill(tx, db->db_object); | |
1948 | ||
1949 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1950 | if (err != 0) { |
428870ff BB |
1951 | dmu_buf_rele(db, FTAG); |
1952 | dmu_buf_rele(db_spill, FTAG); | |
1953 | dmu_tx_abort(tx); | |
1954 | return (err); | |
1955 | } | |
1956 | dmu_buf_will_dirty(db_spill, tx); | |
1957 | ||
1958 | if (db_spill->db_size < drrs->drr_length) | |
1959 | VERIFY(0 == dbuf_spill_set_blksz(db_spill, | |
1960 | drrs->drr_length, tx)); | |
1961 | bcopy(data, db_spill->db_data, drrs->drr_length); | |
1962 | ||
1963 | dmu_buf_rele(db, FTAG); | |
1964 | dmu_buf_rele(db_spill, FTAG); | |
1965 | ||
1966 | dmu_tx_commit(tx); | |
1967 | return (0); | |
1968 | } | |
1969 | ||
34dc7c2f | 1970 | /* ARGSUSED */ |
60948de1 | 1971 | noinline static int |
fcff0f35 | 1972 | receive_free(struct receive_writer_arg *rwa, struct drr_free *drrf) |
34dc7c2f | 1973 | { |
34dc7c2f BB |
1974 | int err; |
1975 | ||
1976 | if (drrf->drr_length != -1ULL && | |
1977 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) | |
2e528b49 | 1978 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1979 | |
fcff0f35 | 1980 | if (dmu_object_info(rwa->os, drrf->drr_object, NULL) != 0) |
2e528b49 | 1981 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1982 | |
fcff0f35 | 1983 | err = dmu_free_long_range(rwa->os, drrf->drr_object, |
34dc7c2f | 1984 | drrf->drr_offset, drrf->drr_length); |
fcff0f35 | 1985 | |
34dc7c2f BB |
1986 | return (err); |
1987 | } | |
1988 | ||
13fe0198 MA |
1989 | /* used to destroy the drc_ds on error */ |
1990 | static void | |
1991 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
1992 | { | |
1993 | char name[MAXNAMELEN]; | |
1994 | dsl_dataset_name(drc->drc_ds, name); | |
1995 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1996 | (void) dsl_destroy_head(name); | |
1997 | } | |
1998 | ||
37f8a883 | 1999 | static void |
fcff0f35 | 2000 | receive_cksum(struct receive_arg *ra, int len, void *buf) |
37f8a883 MA |
2001 | { |
2002 | if (ra->byteswap) { | |
2003 | fletcher_4_incremental_byteswap(buf, len, &ra->cksum); | |
2004 | } else { | |
2005 | fletcher_4_incremental_native(buf, len, &ra->cksum); | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | /* | |
fcff0f35 PD |
2010 | * Read the payload into a buffer of size len, and update the current record's |
2011 | * payload field. | |
2012 | * Allocate ra->next_rrd and read the next record's header into | |
2013 | * ra->next_rrd->header. | |
37f8a883 MA |
2014 | * Verify checksum of payload and next record. |
2015 | */ | |
2016 | static int | |
fcff0f35 | 2017 | receive_read_payload_and_next_header(struct receive_arg *ra, int len, void *buf) |
37f8a883 MA |
2018 | { |
2019 | int err; | |
2020 | zio_cksum_t cksum_orig; | |
2021 | zio_cksum_t *cksump; | |
2022 | ||
2023 | if (len != 0) { | |
fcff0f35 PD |
2024 | ASSERT3U(len, <=, SPA_MAXBLOCKSIZE); |
2025 | ra->rrd->payload = buf; | |
2026 | ra->rrd->payload_size = len; | |
2027 | err = receive_read(ra, len, ra->rrd->payload); | |
37f8a883 MA |
2028 | if (err != 0) |
2029 | return (err); | |
fcff0f35 | 2030 | receive_cksum(ra, len, ra->rrd->payload); |
37f8a883 MA |
2031 | } |
2032 | ||
2033 | ra->prev_cksum = ra->cksum; | |
2034 | ||
fcff0f35 PD |
2035 | ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); |
2036 | err = receive_read(ra, sizeof (ra->next_rrd->header), | |
2037 | &ra->next_rrd->header); | |
2038 | if (err != 0) { | |
2039 | kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); | |
2040 | ra->next_rrd = NULL; | |
37f8a883 | 2041 | return (err); |
fcff0f35 PD |
2042 | } |
2043 | if (ra->next_rrd->header.drr_type == DRR_BEGIN) { | |
2044 | kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); | |
2045 | ra->next_rrd = NULL; | |
37f8a883 | 2046 | return (SET_ERROR(EINVAL)); |
fcff0f35 | 2047 | } |
37f8a883 MA |
2048 | |
2049 | /* | |
2050 | * Note: checksum is of everything up to but not including the | |
2051 | * checksum itself. | |
2052 | */ | |
2053 | ASSERT3U(offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), | |
2054 | ==, sizeof (dmu_replay_record_t) - sizeof (zio_cksum_t)); | |
fcff0f35 | 2055 | receive_cksum(ra, |
37f8a883 | 2056 | offsetof(dmu_replay_record_t, drr_u.drr_checksum.drr_checksum), |
fcff0f35 | 2057 | &ra->next_rrd->header); |
37f8a883 | 2058 | |
fcff0f35 PD |
2059 | cksum_orig = ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; |
2060 | cksump = &ra->next_rrd->header.drr_u.drr_checksum.drr_checksum; | |
37f8a883 MA |
2061 | |
2062 | if (ra->byteswap) | |
fcff0f35 | 2063 | byteswap_record(&ra->next_rrd->header); |
37f8a883 MA |
2064 | |
2065 | if ((!ZIO_CHECKSUM_IS_ZERO(cksump)) && | |
fcff0f35 PD |
2066 | !ZIO_CHECKSUM_EQUAL(ra->cksum, *cksump)) { |
2067 | kmem_free(ra->next_rrd, sizeof (*ra->next_rrd)); | |
2068 | ra->next_rrd = NULL; | |
37f8a883 | 2069 | return (SET_ERROR(ECKSUM)); |
fcff0f35 | 2070 | } |
37f8a883 | 2071 | |
fcff0f35 | 2072 | receive_cksum(ra, sizeof (cksum_orig), &cksum_orig); |
37f8a883 MA |
2073 | |
2074 | return (0); | |
2075 | } | |
2076 | ||
fcff0f35 PD |
2077 | /* |
2078 | * Issue the prefetch reads for any necessary indirect blocks. | |
2079 | * | |
2080 | * We use the object ignore list to tell us whether or not to issue prefetches | |
2081 | * for a given object. We do this for both correctness (in case the blocksize | |
2082 | * of an object has changed) and performance (if the object doesn't exist, don't | |
2083 | * needlessly try to issue prefetches). We also trim the list as we go through | |
2084 | * the stream to prevent it from growing to an unbounded size. | |
2085 | * | |
2086 | * The object numbers within will always be in sorted order, and any write | |
2087 | * records we see will also be in sorted order, but they're not sorted with | |
2088 | * respect to each other (i.e. we can get several object records before | |
2089 | * receiving each object's write records). As a result, once we've reached a | |
2090 | * given object number, we can safely remove any reference to lower object | |
2091 | * numbers in the ignore list. In practice, we receive up to 32 object records | |
2092 | * before receiving write records, so the list can have up to 32 nodes in it. | |
2093 | */ | |
2094 | /* ARGSUSED */ | |
2095 | static void | |
2096 | receive_read_prefetch(struct receive_arg *ra, | |
2097 | uint64_t object, uint64_t offset, uint64_t length) | |
2098 | { | |
2099 | struct receive_ign_obj_node *node = list_head(&ra->ignore_obj_list); | |
2100 | while (node != NULL && node->object < object) { | |
2101 | VERIFY3P(node, ==, list_remove_head(&ra->ignore_obj_list)); | |
2102 | kmem_free(node, sizeof (*node)); | |
2103 | node = list_head(&ra->ignore_obj_list); | |
2104 | } | |
2105 | if (node == NULL || node->object > object) { | |
2106 | dmu_prefetch(ra->os, object, 1, offset, length, | |
2107 | ZIO_PRIORITY_SYNC_READ); | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | /* | |
2112 | * Read records off the stream, issuing any necessary prefetches. | |
2113 | */ | |
37f8a883 | 2114 | static int |
fcff0f35 | 2115 | receive_read_record(struct receive_arg *ra) |
37f8a883 MA |
2116 | { |
2117 | int err; | |
2118 | ||
fcff0f35 | 2119 | switch (ra->rrd->header.drr_type) { |
37f8a883 MA |
2120 | case DRR_OBJECT: |
2121 | { | |
fcff0f35 PD |
2122 | struct drr_object *drro = &ra->rrd->header.drr_u.drr_object; |
2123 | uint32_t size = P2ROUNDUP(drro->drr_bonuslen, 8); | |
2124 | void *buf = kmem_zalloc(size, KM_SLEEP); | |
2125 | dmu_object_info_t doi; | |
2126 | err = receive_read_payload_and_next_header(ra, size, buf); | |
2127 | if (err != 0) { | |
2128 | kmem_free(buf, size); | |
37f8a883 | 2129 | return (err); |
fcff0f35 PD |
2130 | } |
2131 | err = dmu_object_info(ra->os, drro->drr_object, &doi); | |
2132 | /* | |
2133 | * See receive_read_prefetch for an explanation why we're | |
2134 | * storing this object in the ignore_obj_list. | |
2135 | */ | |
2136 | if (err == ENOENT || | |
2137 | (err == 0 && doi.doi_data_block_size != drro->drr_blksz)) { | |
2138 | struct receive_ign_obj_node *node = | |
2139 | kmem_zalloc(sizeof (*node), | |
2140 | KM_SLEEP); | |
2141 | node->object = drro->drr_object; | |
2142 | #ifdef ZFS_DEBUG | |
2143 | { | |
2144 | struct receive_ign_obj_node *last_object = | |
2145 | list_tail(&ra->ignore_obj_list); | |
2146 | uint64_t last_objnum = (last_object != NULL ? | |
2147 | last_object->object : 0); | |
2148 | ASSERT3U(node->object, >, last_objnum); | |
2149 | } | |
2150 | #endif | |
2151 | list_insert_tail(&ra->ignore_obj_list, node); | |
2152 | err = 0; | |
2153 | } | |
2154 | return (err); | |
37f8a883 MA |
2155 | } |
2156 | case DRR_FREEOBJECTS: | |
2157 | { | |
fcff0f35 PD |
2158 | err = receive_read_payload_and_next_header(ra, 0, NULL); |
2159 | return (err); | |
37f8a883 MA |
2160 | } |
2161 | case DRR_WRITE: | |
2162 | { | |
fcff0f35 | 2163 | struct drr_write *drrw = &ra->rrd->header.drr_u.drr_write; |
37f8a883 MA |
2164 | arc_buf_t *abuf = arc_loan_buf(dmu_objset_spa(ra->os), |
2165 | drrw->drr_length); | |
2166 | ||
fcff0f35 | 2167 | err = receive_read_payload_and_next_header(ra, |
37f8a883 | 2168 | drrw->drr_length, abuf->b_data); |
fcff0f35 | 2169 | if (err != 0) { |
37f8a883 | 2170 | dmu_return_arcbuf(abuf); |
fcff0f35 PD |
2171 | return (err); |
2172 | } | |
2173 | ra->rrd->write_buf = abuf; | |
2174 | receive_read_prefetch(ra, drrw->drr_object, drrw->drr_offset, | |
2175 | drrw->drr_length); | |
37f8a883 MA |
2176 | return (err); |
2177 | } | |
2178 | case DRR_WRITE_BYREF: | |
2179 | { | |
fcff0f35 PD |
2180 | struct drr_write_byref *drrwb = |
2181 | &ra->rrd->header.drr_u.drr_write_byref; | |
2182 | err = receive_read_payload_and_next_header(ra, 0, NULL); | |
2183 | receive_read_prefetch(ra, drrwb->drr_object, drrwb->drr_offset, | |
2184 | drrwb->drr_length); | |
2185 | return (err); | |
37f8a883 MA |
2186 | } |
2187 | case DRR_WRITE_EMBEDDED: | |
2188 | { | |
2189 | struct drr_write_embedded *drrwe = | |
fcff0f35 PD |
2190 | &ra->rrd->header.drr_u.drr_write_embedded; |
2191 | uint32_t size = P2ROUNDUP(drrwe->drr_psize, 8); | |
2192 | void *buf = kmem_zalloc(size, KM_SLEEP); | |
2193 | ||
2194 | err = receive_read_payload_and_next_header(ra, size, buf); | |
2195 | if (err != 0) { | |
2196 | kmem_free(buf, size); | |
37f8a883 | 2197 | return (err); |
fcff0f35 PD |
2198 | } |
2199 | ||
2200 | receive_read_prefetch(ra, drrwe->drr_object, drrwe->drr_offset, | |
2201 | drrwe->drr_length); | |
2202 | return (err); | |
37f8a883 MA |
2203 | } |
2204 | case DRR_FREE: | |
2205 | { | |
fcff0f35 PD |
2206 | /* |
2207 | * It might be beneficial to prefetch indirect blocks here, but | |
2208 | * we don't really have the data to decide for sure. | |
2209 | */ | |
2210 | err = receive_read_payload_and_next_header(ra, 0, NULL); | |
2211 | return (err); | |
37f8a883 MA |
2212 | } |
2213 | case DRR_END: | |
2214 | { | |
fcff0f35 | 2215 | struct drr_end *drre = &ra->rrd->header.drr_u.drr_end; |
37f8a883 MA |
2216 | if (!ZIO_CHECKSUM_EQUAL(ra->prev_cksum, drre->drr_checksum)) |
2217 | return (SET_ERROR(EINVAL)); | |
2218 | return (0); | |
2219 | } | |
2220 | case DRR_SPILL: | |
2221 | { | |
fcff0f35 PD |
2222 | struct drr_spill *drrs = &ra->rrd->header.drr_u.drr_spill; |
2223 | void *buf = kmem_zalloc(drrs->drr_length, KM_SLEEP); | |
2224 | err = receive_read_payload_and_next_header(ra, drrs->drr_length, | |
2225 | buf); | |
37f8a883 | 2226 | if (err != 0) |
fcff0f35 PD |
2227 | kmem_free(buf, drrs->drr_length); |
2228 | return (err); | |
2229 | } | |
2230 | default: | |
2231 | return (SET_ERROR(EINVAL)); | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | /* | |
2236 | * Commit the records to the pool. | |
2237 | */ | |
2238 | static int | |
2239 | receive_process_record(struct receive_writer_arg *rwa, | |
2240 | struct receive_record_arg *rrd) | |
2241 | { | |
2242 | int err; | |
2243 | ||
2244 | switch (rrd->header.drr_type) { | |
2245 | case DRR_OBJECT: | |
2246 | { | |
2247 | struct drr_object *drro = &rrd->header.drr_u.drr_object; | |
2248 | err = receive_object(rwa, drro, rrd->payload); | |
2249 | kmem_free(rrd->payload, rrd->payload_size); | |
2250 | rrd->payload = NULL; | |
2251 | return (err); | |
2252 | } | |
2253 | case DRR_FREEOBJECTS: | |
2254 | { | |
2255 | struct drr_freeobjects *drrfo = | |
2256 | &rrd->header.drr_u.drr_freeobjects; | |
2257 | return (receive_freeobjects(rwa, drrfo)); | |
2258 | } | |
2259 | case DRR_WRITE: | |
2260 | { | |
2261 | struct drr_write *drrw = &rrd->header.drr_u.drr_write; | |
2262 | err = receive_write(rwa, drrw, rrd->write_buf); | |
2263 | /* if receive_write() is successful, it consumes the arc_buf */ | |
2264 | if (err != 0) | |
2265 | dmu_return_arcbuf(rrd->write_buf); | |
2266 | rrd->write_buf = NULL; | |
2267 | rrd->payload = NULL; | |
2268 | return (err); | |
2269 | } | |
2270 | case DRR_WRITE_BYREF: | |
2271 | { | |
2272 | struct drr_write_byref *drrwbr = | |
2273 | &rrd->header.drr_u.drr_write_byref; | |
2274 | return (receive_write_byref(rwa, drrwbr)); | |
2275 | } | |
2276 | case DRR_WRITE_EMBEDDED: | |
2277 | { | |
2278 | struct drr_write_embedded *drrwe = | |
2279 | &rrd->header.drr_u.drr_write_embedded; | |
2280 | err = receive_write_embedded(rwa, drrwe, rrd->payload); | |
2281 | kmem_free(rrd->payload, rrd->payload_size); | |
2282 | rrd->payload = NULL; | |
2283 | return (err); | |
2284 | } | |
2285 | case DRR_FREE: | |
2286 | { | |
2287 | struct drr_free *drrf = &rrd->header.drr_u.drr_free; | |
2288 | return (receive_free(rwa, drrf)); | |
2289 | } | |
2290 | case DRR_SPILL: | |
2291 | { | |
2292 | struct drr_spill *drrs = &rrd->header.drr_u.drr_spill; | |
2293 | err = receive_spill(rwa, drrs, rrd->payload); | |
2294 | kmem_free(rrd->payload, rrd->payload_size); | |
2295 | rrd->payload = NULL; | |
2296 | return (err); | |
37f8a883 MA |
2297 | } |
2298 | default: | |
2299 | return (SET_ERROR(EINVAL)); | |
2300 | } | |
2301 | } | |
2302 | ||
34dc7c2f | 2303 | /* |
fcff0f35 PD |
2304 | * dmu_recv_stream's worker thread; pull records off the queue, and then call |
2305 | * receive_process_record When we're done, signal the main thread and exit. | |
2306 | */ | |
2307 | static void | |
2308 | receive_writer_thread(void *arg) | |
2309 | { | |
2310 | struct receive_writer_arg *rwa = arg; | |
2311 | struct receive_record_arg *rrd; | |
2312 | for (rrd = bqueue_dequeue(&rwa->q); !rrd->eos_marker; | |
2313 | rrd = bqueue_dequeue(&rwa->q)) { | |
2314 | /* | |
2315 | * If there's an error, the main thread will stop putting things | |
2316 | * on the queue, but we need to clear everything in it before we | |
2317 | * can exit. | |
2318 | */ | |
2319 | if (rwa->err == 0) { | |
2320 | rwa->err = receive_process_record(rwa, rrd); | |
2321 | } else if (rrd->write_buf != NULL) { | |
2322 | dmu_return_arcbuf(rrd->write_buf); | |
2323 | rrd->write_buf = NULL; | |
2324 | rrd->payload = NULL; | |
2325 | } else if (rrd->payload != NULL) { | |
2326 | kmem_free(rrd->payload, rrd->payload_size); | |
2327 | rrd->payload = NULL; | |
2328 | } | |
2329 | kmem_free(rrd, sizeof (*rrd)); | |
2330 | } | |
2331 | kmem_free(rrd, sizeof (*rrd)); | |
2332 | mutex_enter(&rwa->mutex); | |
2333 | rwa->done = B_TRUE; | |
2334 | cv_signal(&rwa->cv); | |
2335 | mutex_exit(&rwa->mutex); | |
2336 | } | |
2337 | ||
2338 | /* | |
2339 | * Read in the stream's records, one by one, and apply them to the pool. There | |
2340 | * are two threads involved; the thread that calls this function will spin up a | |
2341 | * worker thread, read the records off the stream one by one, and issue | |
2342 | * prefetches for any necessary indirect blocks. It will then push the records | |
2343 | * onto an internal blocking queue. The worker thread will pull the records off | |
2344 | * the queue, and actually write the data into the DMU. This way, the worker | |
2345 | * thread doesn't have to wait for reads to complete, since everything it needs | |
2346 | * (the indirect blocks) will be prefetched. | |
2347 | * | |
34dc7c2f BB |
2348 | * NB: callers *must* call dmu_recv_end() if this succeeds. |
2349 | */ | |
2350 | int | |
572e2857 BB |
2351 | dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, |
2352 | int cleanup_fd, uint64_t *action_handlep) | |
34dc7c2f | 2353 | { |
37f8a883 | 2354 | int err = 0; |
04bc4610 NB |
2355 | struct receive_arg *ra; |
2356 | struct receive_writer_arg *rwa; | |
428870ff | 2357 | int featureflags; |
fcff0f35 | 2358 | struct receive_ign_obj_node *n; |
34dc7c2f | 2359 | |
04bc4610 NB |
2360 | ra = kmem_zalloc(sizeof (*ra), KM_SLEEP); |
2361 | rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP); | |
2362 | ||
2363 | ra->byteswap = drc->drc_byteswap; | |
2364 | ra->cksum = drc->drc_cksum; | |
2365 | ra->vp = vp; | |
2366 | ra->voff = *voffp; | |
2367 | list_create(&ra->ignore_obj_list, sizeof (struct receive_ign_obj_node), | |
fcff0f35 | 2368 | offsetof(struct receive_ign_obj_node, node)); |
34dc7c2f BB |
2369 | |
2370 | /* these were verified in dmu_recv_begin */ | |
13fe0198 | 2371 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, |
428870ff | 2372 | DMU_SUBSTREAM); |
13fe0198 | 2373 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); |
34dc7c2f BB |
2374 | |
2375 | /* | |
2376 | * Open the objset we are modifying. | |
2377 | */ | |
04bc4610 | 2378 | VERIFY0(dmu_objset_from_ds(drc->drc_ds, &ra->os)); |
34dc7c2f | 2379 | |
d683ddbb | 2380 | ASSERT(dsl_dataset_phys(drc->drc_ds)->ds_flags & DS_FLAG_INCONSISTENT); |
34dc7c2f | 2381 | |
428870ff BB |
2382 | featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); |
2383 | ||
2384 | /* if this stream is dedup'ed, set up the avl tree for guid mapping */ | |
2385 | if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { | |
572e2857 BB |
2386 | minor_t minor; |
2387 | ||
2388 | if (cleanup_fd == -1) { | |
04bc4610 | 2389 | ra->err = SET_ERROR(EBADF); |
572e2857 BB |
2390 | goto out; |
2391 | } | |
04bc4610 NB |
2392 | ra->err = zfs_onexit_fd_hold(cleanup_fd, &minor); |
2393 | if (ra->err != 0) { | |
572e2857 BB |
2394 | cleanup_fd = -1; |
2395 | goto out; | |
2396 | } | |
2397 | ||
2398 | if (*action_handlep == 0) { | |
04bc4610 | 2399 | rwa->guid_to_ds_map = |
572e2857 | 2400 | kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); |
04bc4610 | 2401 | avl_create(rwa->guid_to_ds_map, guid_compare, |
572e2857 BB |
2402 | sizeof (guid_map_entry_t), |
2403 | offsetof(guid_map_entry_t, avlnode)); | |
37f8a883 | 2404 | err = zfs_onexit_add_cb(minor, |
04bc4610 | 2405 | free_guid_map_onexit, rwa->guid_to_ds_map, |
572e2857 | 2406 | action_handlep); |
04bc4610 | 2407 | if (ra->err != 0) |
572e2857 BB |
2408 | goto out; |
2409 | } else { | |
37f8a883 | 2410 | err = zfs_onexit_cb_data(minor, *action_handlep, |
04bc4610 NB |
2411 | (void **)&rwa->guid_to_ds_map); |
2412 | if (ra->err != 0) | |
572e2857 BB |
2413 | goto out; |
2414 | } | |
8d35c149 | 2415 | |
04bc4610 | 2416 | drc->drc_guid_to_ds_map = rwa->guid_to_ds_map; |
428870ff BB |
2417 | } |
2418 | ||
04bc4610 | 2419 | err = receive_read_payload_and_next_header(ra, 0, NULL); |
fcff0f35 | 2420 | if (err) |
37f8a883 | 2421 | goto out; |
37f8a883 | 2422 | |
04bc4610 | 2423 | (void) bqueue_init(&rwa->q, zfs_recv_queue_length, |
fcff0f35 | 2424 | offsetof(struct receive_record_arg, node)); |
04bc4610 NB |
2425 | cv_init(&rwa->cv, NULL, CV_DEFAULT, NULL); |
2426 | mutex_init(&rwa->mutex, NULL, MUTEX_DEFAULT, NULL); | |
2427 | rwa->os = ra->os; | |
2428 | rwa->byteswap = drc->drc_byteswap; | |
fcff0f35 | 2429 | |
04bc4610 | 2430 | (void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc, |
fcff0f35 PD |
2431 | TS_RUN, minclsyspri); |
2432 | /* | |
04bc4610 | 2433 | * We're reading rwa->err without locks, which is safe since we are the |
fcff0f35 PD |
2434 | * only reader, and the worker thread is the only writer. It's ok if we |
2435 | * miss a write for an iteration or two of the loop, since the writer | |
2436 | * thread will keep freeing records we send it until we send it an eos | |
2437 | * marker. | |
2438 | * | |
04bc4610 | 2439 | * We can leave this loop in 3 ways: First, if rwa->err is |
fcff0f35 PD |
2440 | * non-zero. In that case, the writer thread will free the rrd we just |
2441 | * pushed. Second, if we're interrupted; in that case, either it's the | |
04bc4610 | 2442 | * first loop and ra->rrd was never allocated, or it's later, and ra.rrd |
fcff0f35 PD |
2443 | * has been handed off to the writer thread who will free it. Finally, |
2444 | * if receive_read_record fails or we're at the end of the stream, then | |
04bc4610 | 2445 | * we free ra->rrd and exit. |
fcff0f35 | 2446 | */ |
04bc4610 | 2447 | while (rwa->err == 0) { |
34dc7c2f | 2448 | if (issig(JUSTLOOKING) && issig(FORREAL)) { |
37f8a883 MA |
2449 | err = SET_ERROR(EINTR); |
2450 | break; | |
34dc7c2f BB |
2451 | } |
2452 | ||
04bc4610 NB |
2453 | ASSERT3P(ra->rrd, ==, NULL); |
2454 | ra->rrd = ra->next_rrd; | |
2455 | ra->next_rrd = NULL; | |
2456 | /* Allocates and loads header into ra->next_rrd */ | |
2457 | err = receive_read_record(ra); | |
34dc7c2f | 2458 | |
04bc4610 NB |
2459 | if (ra->rrd->header.drr_type == DRR_END || err != 0) { |
2460 | kmem_free(ra->rrd, sizeof (*ra->rrd)); | |
2461 | ra->rrd = NULL; | |
428870ff | 2462 | break; |
fcff0f35 PD |
2463 | } |
2464 | ||
04bc4610 NB |
2465 | bqueue_enqueue(&rwa->q, ra->rrd, |
2466 | sizeof (struct receive_record_arg) + ra->rrd->payload_size); | |
2467 | ra->rrd = NULL; | |
fcff0f35 | 2468 | } |
04bc4610 NB |
2469 | if (ra->next_rrd == NULL) |
2470 | ra->next_rrd = kmem_zalloc(sizeof (*ra->next_rrd), KM_SLEEP); | |
2471 | ra->next_rrd->eos_marker = B_TRUE; | |
2472 | bqueue_enqueue(&rwa->q, ra->next_rrd, 1); | |
fcff0f35 | 2473 | |
04bc4610 NB |
2474 | mutex_enter(&rwa->mutex); |
2475 | while (!rwa->done) { | |
2476 | cv_wait(&rwa->cv, &rwa->mutex); | |
34dc7c2f | 2477 | } |
04bc4610 | 2478 | mutex_exit(&rwa->mutex); |
fcff0f35 | 2479 | |
04bc4610 NB |
2480 | cv_destroy(&rwa->cv); |
2481 | mutex_destroy(&rwa->mutex); | |
2482 | bqueue_destroy(&rwa->q); | |
fcff0f35 | 2483 | if (err == 0) |
04bc4610 | 2484 | err = rwa->err; |
34dc7c2f BB |
2485 | |
2486 | out: | |
572e2857 BB |
2487 | if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) |
2488 | zfs_onexit_fd_rele(cleanup_fd); | |
2489 | ||
37f8a883 | 2490 | if (err != 0) { |
34dc7c2f | 2491 | /* |
45d1cae3 BB |
2492 | * destroy what we created, so we don't leave it in the |
2493 | * inconsistent restoring state. | |
34dc7c2f | 2494 | */ |
13fe0198 | 2495 | dmu_recv_cleanup_ds(drc); |
34dc7c2f BB |
2496 | } |
2497 | ||
04bc4610 | 2498 | *voffp = ra->voff; |
fcff0f35 | 2499 | |
04bc4610 NB |
2500 | for (n = list_remove_head(&ra->ignore_obj_list); n != NULL; |
2501 | n = list_remove_head(&ra->ignore_obj_list)) { | |
fcff0f35 PD |
2502 | kmem_free(n, sizeof (*n)); |
2503 | } | |
04bc4610 NB |
2504 | list_destroy(&ra->ignore_obj_list); |
2505 | kmem_free(ra, sizeof (*ra)); | |
2506 | kmem_free(rwa, sizeof (*rwa)); | |
37f8a883 | 2507 | return (err); |
34dc7c2f BB |
2508 | } |
2509 | ||
34dc7c2f | 2510 | static int |
13fe0198 | 2511 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2512 | { |
13fe0198 MA |
2513 | dmu_recv_cookie_t *drc = arg; |
2514 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2515 | int error; | |
2516 | ||
2517 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
2518 | ||
2519 | if (!drc->drc_newfs) { | |
2520 | dsl_dataset_t *origin_head; | |
2521 | ||
2522 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
2523 | if (error != 0) | |
2524 | return (error); | |
19580676 MA |
2525 | if (drc->drc_force) { |
2526 | /* | |
2527 | * We will destroy any snapshots in tofs (i.e. before | |
2528 | * origin_head) that are after the origin (which is | |
2529 | * the snap before drc_ds, because drc_ds can not | |
2530 | * have any snaps of its own). | |
2531 | */ | |
d683ddbb JG |
2532 | uint64_t obj; |
2533 | ||
2534 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
2535 | while (obj != | |
2536 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
19580676 MA |
2537 | dsl_dataset_t *snap; |
2538 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
2539 | &snap); | |
2540 | if (error != 0) | |
b6640117 | 2541 | break; |
19580676 MA |
2542 | if (snap->ds_dir != origin_head->ds_dir) |
2543 | error = SET_ERROR(EINVAL); | |
2544 | if (error == 0) { | |
2545 | error = dsl_destroy_snapshot_check_impl( | |
2546 | snap, B_FALSE); | |
2547 | } | |
d683ddbb | 2548 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
2549 | dsl_dataset_rele(snap, FTAG); |
2550 | if (error != 0) | |
b6640117 AG |
2551 | break; |
2552 | } | |
2553 | if (error != 0) { | |
2554 | dsl_dataset_rele(origin_head, FTAG); | |
2555 | return (error); | |
19580676 MA |
2556 | } |
2557 | } | |
13fe0198 | 2558 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, |
831baf06 | 2559 | origin_head, drc->drc_force, drc->drc_owner, tx); |
13fe0198 MA |
2560 | if (error != 0) { |
2561 | dsl_dataset_rele(origin_head, FTAG); | |
2562 | return (error); | |
2563 | } | |
2564 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
788eb90c | 2565 | drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); |
13fe0198 MA |
2566 | dsl_dataset_rele(origin_head, FTAG); |
2567 | if (error != 0) | |
2568 | return (error); | |
34dc7c2f | 2569 | |
13fe0198 MA |
2570 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); |
2571 | } else { | |
2572 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
788eb90c | 2573 | drc->drc_tosnap, tx, B_TRUE, 1, drc->drc_cred); |
13fe0198 MA |
2574 | } |
2575 | return (error); | |
34dc7c2f BB |
2576 | } |
2577 | ||
2578 | static void | |
13fe0198 | 2579 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 2580 | { |
13fe0198 MA |
2581 | dmu_recv_cookie_t *drc = arg; |
2582 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
2583 | ||
2584 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
2585 | tx, "snap=%s", drc->drc_tosnap); | |
2586 | ||
2587 | if (!drc->drc_newfs) { | |
2588 | dsl_dataset_t *origin_head; | |
2589 | ||
2590 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
2591 | &origin_head)); | |
19580676 MA |
2592 | |
2593 | if (drc->drc_force) { | |
2594 | /* | |
2595 | * Destroy any snapshots of drc_tofs (origin_head) | |
2596 | * after the origin (the snap before drc_ds). | |
2597 | */ | |
d683ddbb JG |
2598 | uint64_t obj; |
2599 | ||
2600 | obj = dsl_dataset_phys(origin_head)->ds_prev_snap_obj; | |
2601 | while (obj != | |
2602 | dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj) { | |
19580676 MA |
2603 | dsl_dataset_t *snap; |
2604 | VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, | |
2605 | &snap)); | |
2606 | ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); | |
d683ddbb | 2607 | obj = dsl_dataset_phys(snap)->ds_prev_snap_obj; |
19580676 MA |
2608 | dsl_destroy_snapshot_sync_impl(snap, |
2609 | B_FALSE, tx); | |
2610 | dsl_dataset_rele(snap, FTAG); | |
2611 | } | |
2612 | } | |
2613 | VERIFY3P(drc->drc_ds->ds_prev, ==, | |
2614 | origin_head->ds_prev); | |
2615 | ||
13fe0198 MA |
2616 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, |
2617 | origin_head, tx); | |
2618 | dsl_dataset_snapshot_sync_impl(origin_head, | |
2619 | drc->drc_tosnap, tx); | |
2620 | ||
2621 | /* set snapshot's creation time and guid */ | |
2622 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
d683ddbb | 2623 | dsl_dataset_phys(origin_head->ds_prev)->ds_creation_time = |
13fe0198 | 2624 | drc->drc_drrb->drr_creation_time; |
d683ddbb | 2625 | dsl_dataset_phys(origin_head->ds_prev)->ds_guid = |
13fe0198 | 2626 | drc->drc_drrb->drr_toguid; |
d683ddbb | 2627 | dsl_dataset_phys(origin_head->ds_prev)->ds_flags &= |
13fe0198 MA |
2628 | ~DS_FLAG_INCONSISTENT; |
2629 | ||
2630 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
d683ddbb JG |
2631 | dsl_dataset_phys(origin_head)->ds_flags &= |
2632 | ~DS_FLAG_INCONSISTENT; | |
13fe0198 MA |
2633 | |
2634 | dsl_dataset_rele(origin_head, FTAG); | |
2635 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
831baf06 KW |
2636 | |
2637 | if (drc->drc_owner != NULL) | |
2638 | VERIFY3P(origin_head->ds_owner, ==, drc->drc_owner); | |
13fe0198 MA |
2639 | } else { |
2640 | dsl_dataset_t *ds = drc->drc_ds; | |
34dc7c2f | 2641 | |
13fe0198 | 2642 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); |
34dc7c2f | 2643 | |
13fe0198 MA |
2644 | /* set snapshot's creation time and guid */ |
2645 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
d683ddbb | 2646 | dsl_dataset_phys(ds->ds_prev)->ds_creation_time = |
13fe0198 | 2647 | drc->drc_drrb->drr_creation_time; |
d683ddbb JG |
2648 | dsl_dataset_phys(ds->ds_prev)->ds_guid = |
2649 | drc->drc_drrb->drr_toguid; | |
2650 | dsl_dataset_phys(ds->ds_prev)->ds_flags &= | |
2651 | ~DS_FLAG_INCONSISTENT; | |
34dc7c2f | 2652 | |
13fe0198 | 2653 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
d683ddbb | 2654 | dsl_dataset_phys(ds)->ds_flags &= ~DS_FLAG_INCONSISTENT; |
13fe0198 | 2655 | } |
d683ddbb | 2656 | drc->drc_newsnapobj = dsl_dataset_phys(drc->drc_ds)->ds_prev_snap_obj; |
a0bd735a | 2657 | zvol_create_minors(dp->dp_spa, drc->drc_tofs, B_TRUE); |
13fe0198 MA |
2658 | /* |
2659 | * Release the hold from dmu_recv_begin. This must be done before | |
2660 | * we return to open context, so that when we free the dataset's dnode, | |
2661 | * we can evict its bonus buffer. | |
2662 | */ | |
2663 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
2664 | drc->drc_ds = NULL; | |
34dc7c2f BB |
2665 | } |
2666 | ||
8d35c149 | 2667 | static int |
13fe0198 | 2668 | add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) |
8d35c149 | 2669 | { |
13fe0198 | 2670 | dsl_pool_t *dp; |
8d35c149 AS |
2671 | dsl_dataset_t *snapds; |
2672 | guid_map_entry_t *gmep; | |
2673 | int err; | |
2674 | ||
2675 | ASSERT(guid_map != NULL); | |
2676 | ||
13fe0198 MA |
2677 | err = dsl_pool_hold(name, FTAG, &dp); |
2678 | if (err != 0) | |
2679 | return (err); | |
7ec09286 MA |
2680 | gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); |
2681 | err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); | |
8d35c149 | 2682 | if (err == 0) { |
d683ddbb | 2683 | gmep->guid = dsl_dataset_phys(snapds)->ds_guid; |
8d35c149 AS |
2684 | gmep->gme_ds = snapds; |
2685 | avl_add(guid_map, gmep); | |
13fe0198 | 2686 | dsl_dataset_long_hold(snapds, gmep); |
7ec09286 MA |
2687 | } else { |
2688 | kmem_free(gmep, sizeof (*gmep)); | |
8d35c149 AS |
2689 | } |
2690 | ||
13fe0198 | 2691 | dsl_pool_rele(dp, FTAG); |
8d35c149 AS |
2692 | return (err); |
2693 | } | |
2694 | ||
13fe0198 MA |
2695 | static int dmu_recv_end_modified_blocks = 3; |
2696 | ||
428870ff BB |
2697 | static int |
2698 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
34dc7c2f | 2699 | { |
13fe0198 | 2700 | int error; |
34dc7c2f | 2701 | |
13fe0198 MA |
2702 | #ifdef _KERNEL |
2703 | char *name; | |
34dc7c2f | 2704 | |
13fe0198 MA |
2705 | /* |
2706 | * We will be destroying the ds; make sure its origin is unmounted if | |
2707 | * necessary. | |
2708 | */ | |
2709 | name = kmem_alloc(MAXNAMELEN, KM_SLEEP); | |
2710 | dsl_dataset_name(drc->drc_ds, name); | |
2711 | zfs_destroy_unmount_origin(name); | |
2712 | kmem_free(name, MAXNAMELEN); | |
2713 | #endif | |
34dc7c2f | 2714 | |
13fe0198 MA |
2715 | error = dsl_sync_task(drc->drc_tofs, |
2716 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3d45fdd6 | 2717 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); |
13fe0198 MA |
2718 | |
2719 | if (error != 0) | |
2720 | dmu_recv_cleanup_ds(drc); | |
2721 | return (error); | |
34dc7c2f | 2722 | } |
428870ff BB |
2723 | |
2724 | static int | |
2725 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
2726 | { | |
13fe0198 | 2727 | int error; |
428870ff | 2728 | |
13fe0198 MA |
2729 | error = dsl_sync_task(drc->drc_tofs, |
2730 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
3d45fdd6 | 2731 | dmu_recv_end_modified_blocks, ZFS_SPACE_CHECK_NORMAL); |
428870ff | 2732 | |
13fe0198 MA |
2733 | if (error != 0) { |
2734 | dmu_recv_cleanup_ds(drc); | |
2735 | } else if (drc->drc_guid_to_ds_map != NULL) { | |
2736 | (void) add_ds_to_guidmap(drc->drc_tofs, | |
2737 | drc->drc_guid_to_ds_map, | |
2738 | drc->drc_newsnapobj); | |
428870ff | 2739 | } |
13fe0198 | 2740 | return (error); |
428870ff BB |
2741 | } |
2742 | ||
2743 | int | |
831baf06 | 2744 | dmu_recv_end(dmu_recv_cookie_t *drc, void *owner) |
428870ff | 2745 | { |
831baf06 KW |
2746 | drc->drc_owner = owner; |
2747 | ||
13fe0198 | 2748 | if (drc->drc_newfs) |
428870ff | 2749 | return (dmu_recv_new_end(drc)); |
13fe0198 MA |
2750 | else |
2751 | return (dmu_recv_existing_end(drc)); | |
428870ff | 2752 | } |
ea97f8ce MA |
2753 | |
2754 | /* | |
2755 | * Return TRUE if this objset is currently being received into. | |
2756 | */ | |
2757 | boolean_t | |
2758 | dmu_objset_is_receiving(objset_t *os) | |
2759 | { | |
2760 | return (os->os_dsl_dataset != NULL && | |
2761 | os->os_dsl_dataset->ds_owner == dmu_recv_tag); | |
2762 | } | |
fd8febbd TF |
2763 | |
2764 | #if defined(_KERNEL) | |
2765 | module_param(zfs_send_corrupt_data, int, 0644); | |
2766 | MODULE_PARM_DESC(zfs_send_corrupt_data, "Allow sending corrupt data"); | |
2767 | #endif |