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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
330d06f9 | 23 | * Copyright (c) 2011 by Delphix. All rights reserved. |
8d35c149 | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
37abac6d | 25 | * Copyright (c) 2012, Joyent, Inc. All rights reserved. |
2e528b49 | 26 | * Copyright (c) 2013 by Delphix. All rights reserved. |
8d35c149 | 27 | */ |
34dc7c2f | 28 | |
34dc7c2f BB |
29 | #include <sys/dmu.h> |
30 | #include <sys/dmu_impl.h> | |
31 | #include <sys/dmu_tx.h> | |
32 | #include <sys/dbuf.h> | |
33 | #include <sys/dnode.h> | |
34 | #include <sys/zfs_context.h> | |
35 | #include <sys/dmu_objset.h> | |
36 | #include <sys/dmu_traverse.h> | |
37 | #include <sys/dsl_dataset.h> | |
38 | #include <sys/dsl_dir.h> | |
428870ff | 39 | #include <sys/dsl_prop.h> |
34dc7c2f BB |
40 | #include <sys/dsl_pool.h> |
41 | #include <sys/dsl_synctask.h> | |
044baf00 | 42 | #include <sys/spa_impl.h> |
34dc7c2f BB |
43 | #include <sys/zfs_ioctl.h> |
44 | #include <sys/zap.h> | |
45 | #include <sys/zio_checksum.h> | |
428870ff BB |
46 | #include <sys/zfs_znode.h> |
47 | #include <zfs_fletcher.h> | |
48 | #include <sys/avl.h> | |
49 | #include <sys/ddt.h> | |
572e2857 | 50 | #include <sys/zfs_onexit.h> |
13fe0198 MA |
51 | #include <sys/dmu_send.h> |
52 | #include <sys/dsl_destroy.h> | |
34dc7c2f | 53 | |
330d06f9 MA |
54 | /* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */ |
55 | int zfs_send_corrupt_data = B_FALSE; | |
56 | ||
34dc7c2f | 57 | static char *dmu_recv_tag = "dmu_recv_tag"; |
13fe0198 | 58 | static const char *recv_clone_name = "%recv"; |
34dc7c2f | 59 | |
044baf00 BB |
60 | typedef struct dump_bytes_io { |
61 | dmu_sendarg_t *dbi_dsp; | |
62 | void *dbi_buf; | |
63 | int dbi_len; | |
64 | } dump_bytes_io_t; | |
65 | ||
66 | static void | |
67 | dump_bytes_strategy(void *arg) | |
34dc7c2f | 68 | { |
044baf00 BB |
69 | dump_bytes_io_t *dbi = (dump_bytes_io_t *)arg; |
70 | dmu_sendarg_t *dsp = dbi->dbi_dsp; | |
37abac6d | 71 | dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset; |
34dc7c2f | 72 | ssize_t resid; /* have to get resid to get detailed errno */ |
c99c9001 | 73 | ASSERT0(dbi->dbi_len % 8); |
34dc7c2f | 74 | |
044baf00 | 75 | fletcher_4_incremental_native(dbi->dbi_buf, dbi->dbi_len, &dsp->dsa_zc); |
37abac6d | 76 | dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp, |
044baf00 | 77 | (caddr_t)dbi->dbi_buf, dbi->dbi_len, |
34dc7c2f | 78 | 0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid); |
37abac6d BP |
79 | |
80 | mutex_enter(&ds->ds_sendstream_lock); | |
044baf00 | 81 | *dsp->dsa_off += dbi->dbi_len; |
37abac6d | 82 | mutex_exit(&ds->ds_sendstream_lock); |
044baf00 BB |
83 | } |
84 | ||
85 | static int | |
86 | dump_bytes(dmu_sendarg_t *dsp, void *buf, int len) | |
87 | { | |
88 | dump_bytes_io_t dbi; | |
89 | ||
90 | dbi.dbi_dsp = dsp; | |
91 | dbi.dbi_buf = buf; | |
92 | dbi.dbi_len = len; | |
93 | ||
94 | /* | |
95 | * The vn_rdwr() call is performed in a taskq to ensure that there is | |
96 | * always enough stack space to write safely to the target filesystem. | |
97 | * The ZIO_TYPE_FREE threads are used because there can be a lot of | |
98 | * them and they are used in vdev_file.c for a similar purpose. | |
99 | */ | |
100 | spa_taskq_dispatch_sync(dmu_objset_spa(dsp->dsa_os), ZIO_TYPE_FREE, | |
101 | ZIO_TASKQ_ISSUE, dump_bytes_strategy, &dbi, TQ_SLEEP); | |
37abac6d BP |
102 | |
103 | return (dsp->dsa_err); | |
34dc7c2f BB |
104 | } |
105 | ||
106 | static int | |
37abac6d | 107 | dump_free(dmu_sendarg_t *dsp, uint64_t object, uint64_t offset, |
34dc7c2f BB |
108 | uint64_t length) |
109 | { | |
37abac6d | 110 | struct drr_free *drrf = &(dsp->dsa_drr->drr_u.drr_free); |
428870ff | 111 | |
c578f007 SK |
112 | if (length != -1ULL && offset + length < offset) |
113 | length = -1ULL; | |
114 | ||
428870ff BB |
115 | /* |
116 | * If there is a pending op, but it's not PENDING_FREE, push it out, | |
117 | * since free block aggregation can only be done for blocks of the | |
118 | * same type (i.e., DRR_FREE records can only be aggregated with | |
119 | * other DRR_FREE records. DRR_FREEOBJECTS records can only be | |
120 | * aggregated with other DRR_FREEOBJECTS records. | |
121 | */ | |
37abac6d BP |
122 | if (dsp->dsa_pending_op != PENDING_NONE && |
123 | dsp->dsa_pending_op != PENDING_FREE) { | |
124 | if (dump_bytes(dsp, dsp->dsa_drr, | |
125 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 126 | return (SET_ERROR(EINTR)); |
37abac6d | 127 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
128 | } |
129 | ||
37abac6d | 130 | if (dsp->dsa_pending_op == PENDING_FREE) { |
428870ff BB |
131 | /* |
132 | * There should never be a PENDING_FREE if length is -1 | |
133 | * (because dump_dnode is the only place where this | |
134 | * function is called with a -1, and only after flushing | |
135 | * any pending record). | |
136 | */ | |
137 | ASSERT(length != -1ULL); | |
138 | /* | |
139 | * Check to see whether this free block can be aggregated | |
140 | * with pending one. | |
141 | */ | |
142 | if (drrf->drr_object == object && drrf->drr_offset + | |
143 | drrf->drr_length == offset) { | |
144 | drrf->drr_length += length; | |
145 | return (0); | |
146 | } else { | |
147 | /* not a continuation. Push out pending record */ | |
37abac6d | 148 | if (dump_bytes(dsp, dsp->dsa_drr, |
428870ff | 149 | sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 150 | return (SET_ERROR(EINTR)); |
37abac6d | 151 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
152 | } |
153 | } | |
154 | /* create a FREE record and make it pending */ | |
37abac6d BP |
155 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
156 | dsp->dsa_drr->drr_type = DRR_FREE; | |
428870ff BB |
157 | drrf->drr_object = object; |
158 | drrf->drr_offset = offset; | |
159 | drrf->drr_length = length; | |
37abac6d | 160 | drrf->drr_toguid = dsp->dsa_toguid; |
428870ff | 161 | if (length == -1ULL) { |
37abac6d BP |
162 | if (dump_bytes(dsp, dsp->dsa_drr, |
163 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 164 | return (SET_ERROR(EINTR)); |
428870ff | 165 | } else { |
37abac6d | 166 | dsp->dsa_pending_op = PENDING_FREE; |
428870ff | 167 | } |
34dc7c2f | 168 | |
34dc7c2f BB |
169 | return (0); |
170 | } | |
171 | ||
172 | static int | |
37abac6d | 173 | dump_data(dmu_sendarg_t *dsp, dmu_object_type_t type, |
428870ff | 174 | uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data) |
34dc7c2f | 175 | { |
37abac6d | 176 | struct drr_write *drrw = &(dsp->dsa_drr->drr_u.drr_write); |
428870ff BB |
177 | |
178 | ||
179 | /* | |
180 | * If there is any kind of pending aggregation (currently either | |
181 | * a grouping of free objects or free blocks), push it out to | |
182 | * the stream, since aggregation can't be done across operations | |
183 | * of different types. | |
184 | */ | |
37abac6d BP |
185 | if (dsp->dsa_pending_op != PENDING_NONE) { |
186 | if (dump_bytes(dsp, dsp->dsa_drr, | |
187 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 188 | return (SET_ERROR(EINTR)); |
37abac6d | 189 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 190 | } |
34dc7c2f | 191 | /* write a DATA record */ |
37abac6d BP |
192 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
193 | dsp->dsa_drr->drr_type = DRR_WRITE; | |
428870ff BB |
194 | drrw->drr_object = object; |
195 | drrw->drr_type = type; | |
196 | drrw->drr_offset = offset; | |
197 | drrw->drr_length = blksz; | |
37abac6d | 198 | drrw->drr_toguid = dsp->dsa_toguid; |
428870ff BB |
199 | drrw->drr_checksumtype = BP_GET_CHECKSUM(bp); |
200 | if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup) | |
201 | drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP; | |
202 | DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp)); | |
203 | DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp)); | |
204 | DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp)); | |
205 | drrw->drr_key.ddk_cksum = bp->blk_cksum; | |
206 | ||
37abac6d | 207 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 208 | return (SET_ERROR(EINTR)); |
37abac6d | 209 | if (dump_bytes(dsp, data, blksz) != 0) |
2e528b49 | 210 | return (SET_ERROR(EINTR)); |
428870ff BB |
211 | return (0); |
212 | } | |
213 | ||
214 | static int | |
37abac6d | 215 | dump_spill(dmu_sendarg_t *dsp, uint64_t object, int blksz, void *data) |
428870ff | 216 | { |
37abac6d | 217 | struct drr_spill *drrs = &(dsp->dsa_drr->drr_u.drr_spill); |
428870ff | 218 | |
37abac6d BP |
219 | if (dsp->dsa_pending_op != PENDING_NONE) { |
220 | if (dump_bytes(dsp, dsp->dsa_drr, | |
221 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 222 | return (SET_ERROR(EINTR)); |
37abac6d | 223 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
224 | } |
225 | ||
226 | /* write a SPILL record */ | |
37abac6d BP |
227 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
228 | dsp->dsa_drr->drr_type = DRR_SPILL; | |
428870ff BB |
229 | drrs->drr_object = object; |
230 | drrs->drr_length = blksz; | |
37abac6d | 231 | drrs->drr_toguid = dsp->dsa_toguid; |
34dc7c2f | 232 | |
37abac6d | 233 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t))) |
2e528b49 | 234 | return (SET_ERROR(EINTR)); |
37abac6d | 235 | if (dump_bytes(dsp, data, blksz)) |
2e528b49 | 236 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
237 | return (0); |
238 | } | |
239 | ||
240 | static int | |
37abac6d | 241 | dump_freeobjects(dmu_sendarg_t *dsp, uint64_t firstobj, uint64_t numobjs) |
34dc7c2f | 242 | { |
37abac6d | 243 | struct drr_freeobjects *drrfo = &(dsp->dsa_drr->drr_u.drr_freeobjects); |
428870ff BB |
244 | |
245 | /* | |
246 | * If there is a pending op, but it's not PENDING_FREEOBJECTS, | |
247 | * push it out, since free block aggregation can only be done for | |
248 | * blocks of the same type (i.e., DRR_FREE records can only be | |
249 | * aggregated with other DRR_FREE records. DRR_FREEOBJECTS records | |
250 | * can only be aggregated with other DRR_FREEOBJECTS records. | |
251 | */ | |
37abac6d BP |
252 | if (dsp->dsa_pending_op != PENDING_NONE && |
253 | dsp->dsa_pending_op != PENDING_FREEOBJECTS) { | |
254 | if (dump_bytes(dsp, dsp->dsa_drr, | |
255 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 256 | return (SET_ERROR(EINTR)); |
37abac6d | 257 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff | 258 | } |
37abac6d | 259 | if (dsp->dsa_pending_op == PENDING_FREEOBJECTS) { |
428870ff BB |
260 | /* |
261 | * See whether this free object array can be aggregated | |
262 | * with pending one | |
263 | */ | |
264 | if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) { | |
265 | drrfo->drr_numobjs += numobjs; | |
266 | return (0); | |
267 | } else { | |
268 | /* can't be aggregated. Push out pending record */ | |
37abac6d | 269 | if (dump_bytes(dsp, dsp->dsa_drr, |
428870ff | 270 | sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 271 | return (SET_ERROR(EINTR)); |
37abac6d | 272 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
273 | } |
274 | } | |
275 | ||
34dc7c2f | 276 | /* write a FREEOBJECTS record */ |
37abac6d BP |
277 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
278 | dsp->dsa_drr->drr_type = DRR_FREEOBJECTS; | |
428870ff BB |
279 | drrfo->drr_firstobj = firstobj; |
280 | drrfo->drr_numobjs = numobjs; | |
37abac6d | 281 | drrfo->drr_toguid = dsp->dsa_toguid; |
428870ff | 282 | |
37abac6d | 283 | dsp->dsa_pending_op = PENDING_FREEOBJECTS; |
34dc7c2f | 284 | |
34dc7c2f BB |
285 | return (0); |
286 | } | |
287 | ||
288 | static int | |
37abac6d | 289 | dump_dnode(dmu_sendarg_t *dsp, uint64_t object, dnode_phys_t *dnp) |
34dc7c2f | 290 | { |
37abac6d | 291 | struct drr_object *drro = &(dsp->dsa_drr->drr_u.drr_object); |
428870ff | 292 | |
34dc7c2f | 293 | if (dnp == NULL || dnp->dn_type == DMU_OT_NONE) |
37abac6d | 294 | return (dump_freeobjects(dsp, object, 1)); |
34dc7c2f | 295 | |
37abac6d BP |
296 | if (dsp->dsa_pending_op != PENDING_NONE) { |
297 | if (dump_bytes(dsp, dsp->dsa_drr, | |
298 | sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 299 | return (SET_ERROR(EINTR)); |
37abac6d | 300 | dsp->dsa_pending_op = PENDING_NONE; |
428870ff BB |
301 | } |
302 | ||
34dc7c2f | 303 | /* write an OBJECT record */ |
37abac6d BP |
304 | bzero(dsp->dsa_drr, sizeof (dmu_replay_record_t)); |
305 | dsp->dsa_drr->drr_type = DRR_OBJECT; | |
428870ff BB |
306 | drro->drr_object = object; |
307 | drro->drr_type = dnp->dn_type; | |
308 | drro->drr_bonustype = dnp->dn_bonustype; | |
309 | drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT; | |
310 | drro->drr_bonuslen = dnp->dn_bonuslen; | |
311 | drro->drr_checksumtype = dnp->dn_checksum; | |
312 | drro->drr_compress = dnp->dn_compress; | |
37abac6d | 313 | drro->drr_toguid = dsp->dsa_toguid; |
428870ff | 314 | |
37abac6d | 315 | if (dump_bytes(dsp, dsp->dsa_drr, sizeof (dmu_replay_record_t)) != 0) |
2e528b49 | 316 | return (SET_ERROR(EINTR)); |
34dc7c2f | 317 | |
37abac6d | 318 | if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) |
2e528b49 | 319 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
320 | |
321 | /* free anything past the end of the file */ | |
37abac6d | 322 | if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * |
34dc7c2f | 323 | (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL)) |
2e528b49 | 324 | return (SET_ERROR(EINTR)); |
13fe0198 | 325 | if (dsp->dsa_err != 0) |
2e528b49 | 326 | return (SET_ERROR(EINTR)); |
34dc7c2f BB |
327 | return (0); |
328 | } | |
329 | ||
330 | #define BP_SPAN(dnp, level) \ | |
331 | (((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \ | |
332 | (level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT))) | |
333 | ||
428870ff | 334 | /* ARGSUSED */ |
34dc7c2f | 335 | static int |
294f6806 | 336 | backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, |
428870ff | 337 | const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg) |
34dc7c2f | 338 | { |
37abac6d | 339 | dmu_sendarg_t *dsp = arg; |
34dc7c2f | 340 | dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE; |
34dc7c2f BB |
341 | int err = 0; |
342 | ||
343 | if (issig(JUSTLOOKING) && issig(FORREAL)) | |
2e528b49 | 344 | return (SET_ERROR(EINTR)); |
34dc7c2f | 345 | |
428870ff BB |
346 | if (zb->zb_object != DMU_META_DNODE_OBJECT && |
347 | DMU_OBJECT_IS_SPECIAL(zb->zb_object)) { | |
9babb374 | 348 | return (0); |
428870ff | 349 | } else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) { |
b128c09f BB |
350 | uint64_t span = BP_SPAN(dnp, zb->zb_level); |
351 | uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT; | |
37abac6d | 352 | err = dump_freeobjects(dsp, dnobj, span >> DNODE_SHIFT); |
34dc7c2f | 353 | } else if (bp == NULL) { |
b128c09f | 354 | uint64_t span = BP_SPAN(dnp, zb->zb_level); |
37abac6d | 355 | err = dump_free(dsp, zb->zb_object, zb->zb_blkid * span, span); |
b128c09f BB |
356 | } else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) { |
357 | return (0); | |
358 | } else if (type == DMU_OT_DNODE) { | |
359 | dnode_phys_t *blk; | |
34dc7c2f BB |
360 | int i; |
361 | int blksz = BP_GET_LSIZE(bp); | |
b128c09f BB |
362 | uint32_t aflags = ARC_WAIT; |
363 | arc_buf_t *abuf; | |
364 | ||
294f6806 GW |
365 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
366 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
367 | &aflags, zb) != 0) | |
2e528b49 | 368 | return (SET_ERROR(EIO)); |
34dc7c2f | 369 | |
b128c09f | 370 | blk = abuf->b_data; |
34dc7c2f | 371 | for (i = 0; i < blksz >> DNODE_SHIFT; i++) { |
b128c09f BB |
372 | uint64_t dnobj = (zb->zb_blkid << |
373 | (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i; | |
37abac6d | 374 | err = dump_dnode(dsp, dnobj, blk+i); |
13fe0198 | 375 | if (err != 0) |
34dc7c2f BB |
376 | break; |
377 | } | |
b128c09f | 378 | (void) arc_buf_remove_ref(abuf, &abuf); |
428870ff | 379 | } else if (type == DMU_OT_SA) { |
b128c09f BB |
380 | uint32_t aflags = ARC_WAIT; |
381 | arc_buf_t *abuf; | |
34dc7c2f | 382 | int blksz = BP_GET_LSIZE(bp); |
b128c09f | 383 | |
294f6806 GW |
384 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
385 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
386 | &aflags, zb) != 0) | |
2e528b49 | 387 | return (SET_ERROR(EIO)); |
b128c09f | 388 | |
37abac6d | 389 | err = dump_spill(dsp, zb->zb_object, blksz, abuf->b_data); |
428870ff BB |
390 | (void) arc_buf_remove_ref(abuf, &abuf); |
391 | } else { /* it's a level-0 block of a regular object */ | |
392 | uint32_t aflags = ARC_WAIT; | |
393 | arc_buf_t *abuf; | |
394 | int blksz = BP_GET_LSIZE(bp); | |
395 | ||
294f6806 GW |
396 | if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf, |
397 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, | |
398 | &aflags, zb) != 0) { | |
330d06f9 MA |
399 | if (zfs_send_corrupt_data) { |
400 | uint64_t *ptr; | |
401 | /* Send a block filled with 0x"zfs badd bloc" */ | |
402 | abuf = arc_buf_alloc(spa, blksz, &abuf, | |
403 | ARC_BUFC_DATA); | |
404 | for (ptr = abuf->b_data; | |
405 | (char *)ptr < (char *)abuf->b_data + blksz; | |
406 | ptr++) | |
dd26aa53 | 407 | *ptr = 0x2f5baddb10cULL; |
330d06f9 | 408 | } else { |
2e528b49 | 409 | return (SET_ERROR(EIO)); |
330d06f9 MA |
410 | } |
411 | } | |
428870ff | 412 | |
37abac6d | 413 | err = dump_data(dsp, type, zb->zb_object, zb->zb_blkid * blksz, |
428870ff | 414 | blksz, bp, abuf->b_data); |
b128c09f | 415 | (void) arc_buf_remove_ref(abuf, &abuf); |
34dc7c2f BB |
416 | } |
417 | ||
418 | ASSERT(err == 0 || err == EINTR); | |
419 | return (err); | |
420 | } | |
421 | ||
6f1ffb06 | 422 | /* |
13fe0198 | 423 | * Releases dp, ds, and fromds, using the specified tag. |
6f1ffb06 | 424 | */ |
13fe0198 MA |
425 | static int |
426 | dmu_send_impl(void *tag, dsl_pool_t *dp, dsl_dataset_t *ds, | |
427 | dsl_dataset_t *fromds, int outfd, vnode_t *vp, offset_t *off) | |
34dc7c2f | 428 | { |
13fe0198 | 429 | objset_t *os; |
34dc7c2f | 430 | dmu_replay_record_t *drr; |
37abac6d | 431 | dmu_sendarg_t *dsp; |
34dc7c2f BB |
432 | int err; |
433 | uint64_t fromtxg = 0; | |
434 | ||
13fe0198 MA |
435 | if (fromds != NULL && !dsl_dataset_is_before(ds, fromds)) { |
436 | dsl_dataset_rele(fromds, tag); | |
437 | dsl_dataset_rele(ds, tag); | |
438 | dsl_pool_rele(dp, tag); | |
2e528b49 | 439 | return (SET_ERROR(EXDEV)); |
13fe0198 MA |
440 | } |
441 | ||
442 | err = dmu_objset_from_ds(ds, &os); | |
443 | if (err != 0) { | |
444 | if (fromds != NULL) | |
445 | dsl_dataset_rele(fromds, tag); | |
446 | dsl_dataset_rele(ds, tag); | |
447 | dsl_pool_rele(dp, tag); | |
448 | return (err); | |
449 | } | |
34dc7c2f | 450 | |
34dc7c2f BB |
451 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
452 | drr->drr_type = DRR_BEGIN; | |
453 | drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
428870ff BB |
454 | DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo, |
455 | DMU_SUBSTREAM); | |
456 | ||
457 | #ifdef _KERNEL | |
13fe0198 | 458 | if (dmu_objset_type(os) == DMU_OST_ZFS) { |
428870ff | 459 | uint64_t version; |
13fe0198 | 460 | if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &version) != 0) { |
37abac6d | 461 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
13fe0198 MA |
462 | if (fromds != NULL) |
463 | dsl_dataset_rele(fromds, tag); | |
464 | dsl_dataset_rele(ds, tag); | |
465 | dsl_pool_rele(dp, tag); | |
2e528b49 | 466 | return (SET_ERROR(EINVAL)); |
37abac6d | 467 | } |
13fe0198 | 468 | if (version >= ZPL_VERSION_SA) { |
428870ff BB |
469 | DMU_SET_FEATUREFLAGS( |
470 | drr->drr_u.drr_begin.drr_versioninfo, | |
471 | DMU_BACKUP_FEATURE_SA_SPILL); | |
472 | } | |
473 | } | |
474 | #endif | |
475 | ||
34dc7c2f BB |
476 | drr->drr_u.drr_begin.drr_creation_time = |
477 | ds->ds_phys->ds_creation_time; | |
13fe0198 | 478 | drr->drr_u.drr_begin.drr_type = dmu_objset_type(os); |
6f1ffb06 | 479 | if (fromds != NULL && ds->ds_dir != fromds->ds_dir) |
34dc7c2f BB |
480 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; |
481 | drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid; | |
482 | if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) | |
483 | drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA; | |
484 | ||
13fe0198 | 485 | if (fromds != NULL) |
34dc7c2f BB |
486 | drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid; |
487 | dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname); | |
488 | ||
13fe0198 | 489 | if (fromds != NULL) { |
34dc7c2f | 490 | fromtxg = fromds->ds_phys->ds_creation_txg; |
13fe0198 MA |
491 | dsl_dataset_rele(fromds, tag); |
492 | fromds = NULL; | |
493 | } | |
34dc7c2f | 494 | |
37abac6d BP |
495 | dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); |
496 | ||
497 | dsp->dsa_drr = drr; | |
498 | dsp->dsa_vp = vp; | |
499 | dsp->dsa_outfd = outfd; | |
500 | dsp->dsa_proc = curproc; | |
13fe0198 | 501 | dsp->dsa_os = os; |
37abac6d BP |
502 | dsp->dsa_off = off; |
503 | dsp->dsa_toguid = ds->ds_phys->ds_guid; | |
504 | ZIO_SET_CHECKSUM(&dsp->dsa_zc, 0, 0, 0, 0); | |
505 | dsp->dsa_pending_op = PENDING_NONE; | |
506 | ||
507 | mutex_enter(&ds->ds_sendstream_lock); | |
508 | list_insert_head(&ds->ds_sendstreams, dsp); | |
509 | mutex_exit(&ds->ds_sendstream_lock); | |
510 | ||
7ec09286 MA |
511 | dsl_dataset_long_hold(ds, FTAG); |
512 | dsl_pool_rele(dp, tag); | |
513 | ||
37abac6d BP |
514 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { |
515 | err = dsp->dsa_err; | |
516 | goto out; | |
34dc7c2f BB |
517 | } |
518 | ||
b128c09f | 519 | err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH, |
37abac6d | 520 | backup_cb, dsp); |
34dc7c2f | 521 | |
37abac6d BP |
522 | if (dsp->dsa_pending_op != PENDING_NONE) |
523 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) | |
2e528b49 | 524 | err = SET_ERROR(EINTR); |
428870ff | 525 | |
13fe0198 MA |
526 | if (err != 0) { |
527 | if (err == EINTR && dsp->dsa_err != 0) | |
37abac6d BP |
528 | err = dsp->dsa_err; |
529 | goto out; | |
34dc7c2f BB |
530 | } |
531 | ||
532 | bzero(drr, sizeof (dmu_replay_record_t)); | |
533 | drr->drr_type = DRR_END; | |
37abac6d BP |
534 | drr->drr_u.drr_end.drr_checksum = dsp->dsa_zc; |
535 | drr->drr_u.drr_end.drr_toguid = dsp->dsa_toguid; | |
34dc7c2f | 536 | |
37abac6d BP |
537 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { |
538 | err = dsp->dsa_err; | |
539 | goto out; | |
34dc7c2f BB |
540 | } |
541 | ||
37abac6d BP |
542 | out: |
543 | mutex_enter(&ds->ds_sendstream_lock); | |
544 | list_remove(&ds->ds_sendstreams, dsp); | |
545 | mutex_exit(&ds->ds_sendstream_lock); | |
546 | ||
34dc7c2f | 547 | kmem_free(drr, sizeof (dmu_replay_record_t)); |
37abac6d | 548 | kmem_free(dsp, sizeof (dmu_sendarg_t)); |
34dc7c2f | 549 | |
13fe0198 MA |
550 | dsl_dataset_long_rele(ds, FTAG); |
551 | dsl_dataset_rele(ds, tag); | |
552 | ||
37abac6d | 553 | return (err); |
34dc7c2f BB |
554 | } |
555 | ||
330d06f9 | 556 | int |
13fe0198 MA |
557 | dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap, |
558 | int outfd, vnode_t *vp, offset_t *off) | |
559 | { | |
560 | dsl_pool_t *dp; | |
561 | dsl_dataset_t *ds; | |
562 | dsl_dataset_t *fromds = NULL; | |
563 | int err; | |
564 | ||
565 | err = dsl_pool_hold(pool, FTAG, &dp); | |
566 | if (err != 0) | |
567 | return (err); | |
568 | ||
569 | err = dsl_dataset_hold_obj(dp, tosnap, FTAG, &ds); | |
570 | if (err != 0) { | |
571 | dsl_pool_rele(dp, FTAG); | |
572 | return (err); | |
573 | } | |
574 | ||
575 | if (fromsnap != 0) { | |
576 | err = dsl_dataset_hold_obj(dp, fromsnap, FTAG, &fromds); | |
577 | if (err != 0) { | |
578 | dsl_dataset_rele(ds, FTAG); | |
579 | dsl_pool_rele(dp, FTAG); | |
580 | return (err); | |
581 | } | |
582 | } | |
583 | ||
584 | return (dmu_send_impl(FTAG, dp, ds, fromds, outfd, vp, off)); | |
585 | } | |
586 | ||
587 | int | |
588 | dmu_send(const char *tosnap, const char *fromsnap, | |
589 | int outfd, vnode_t *vp, offset_t *off) | |
590 | { | |
591 | dsl_pool_t *dp; | |
592 | dsl_dataset_t *ds; | |
593 | dsl_dataset_t *fromds = NULL; | |
594 | int err; | |
595 | ||
596 | if (strchr(tosnap, '@') == NULL) | |
2e528b49 | 597 | return (SET_ERROR(EINVAL)); |
13fe0198 | 598 | if (fromsnap != NULL && strchr(fromsnap, '@') == NULL) |
2e528b49 | 599 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
600 | |
601 | err = dsl_pool_hold(tosnap, FTAG, &dp); | |
602 | if (err != 0) | |
603 | return (err); | |
604 | ||
605 | err = dsl_dataset_hold(dp, tosnap, FTAG, &ds); | |
606 | if (err != 0) { | |
607 | dsl_pool_rele(dp, FTAG); | |
608 | return (err); | |
609 | } | |
610 | ||
611 | if (fromsnap != NULL) { | |
612 | err = dsl_dataset_hold(dp, fromsnap, FTAG, &fromds); | |
613 | if (err != 0) { | |
614 | dsl_dataset_rele(ds, FTAG); | |
615 | dsl_pool_rele(dp, FTAG); | |
616 | return (err); | |
617 | } | |
618 | } | |
619 | return (dmu_send_impl(FTAG, dp, ds, fromds, outfd, vp, off)); | |
620 | } | |
621 | ||
622 | int | |
623 | dmu_send_estimate(dsl_dataset_t *ds, dsl_dataset_t *fromds, uint64_t *sizep) | |
330d06f9 | 624 | { |
330d06f9 MA |
625 | int err; |
626 | uint64_t size, recordsize; | |
13fe0198 MA |
627 | ASSERTV(dsl_pool_t *dp = ds->ds_dir->dd_pool); |
628 | ||
629 | ASSERT(dsl_pool_config_held(dp)); | |
330d06f9 MA |
630 | |
631 | /* tosnap must be a snapshot */ | |
13fe0198 | 632 | if (!dsl_dataset_is_snapshot(ds)) |
2e528b49 | 633 | return (SET_ERROR(EINVAL)); |
330d06f9 | 634 | |
6f1ffb06 MA |
635 | /* |
636 | * fromsnap must be an earlier snapshot from the same fs as tosnap, | |
637 | * or the origin's fs. | |
638 | */ | |
13fe0198 | 639 | if (fromds != NULL && !dsl_dataset_is_before(ds, fromds)) |
2e528b49 | 640 | return (SET_ERROR(EXDEV)); |
330d06f9 | 641 | |
330d06f9 MA |
642 | /* Get uncompressed size estimate of changed data. */ |
643 | if (fromds == NULL) { | |
644 | size = ds->ds_phys->ds_uncompressed_bytes; | |
645 | } else { | |
646 | uint64_t used, comp; | |
647 | err = dsl_dataset_space_written(fromds, ds, | |
648 | &used, &comp, &size); | |
13fe0198 | 649 | if (err != 0) |
330d06f9 MA |
650 | return (err); |
651 | } | |
652 | ||
653 | /* | |
654 | * Assume that space (both on-disk and in-stream) is dominated by | |
655 | * data. We will adjust for indirect blocks and the copies property, | |
656 | * but ignore per-object space used (eg, dnodes and DRR_OBJECT records). | |
657 | */ | |
658 | ||
659 | /* | |
660 | * Subtract out approximate space used by indirect blocks. | |
661 | * Assume most space is used by data blocks (non-indirect, non-dnode). | |
662 | * Assume all blocks are recordsize. Assume ditto blocks and | |
663 | * internal fragmentation counter out compression. | |
664 | * | |
665 | * Therefore, space used by indirect blocks is sizeof(blkptr_t) per | |
666 | * block, which we observe in practice. | |
667 | */ | |
13fe0198 MA |
668 | err = dsl_prop_get_int_ds(ds, "recordsize", &recordsize); |
669 | if (err != 0) | |
330d06f9 MA |
670 | return (err); |
671 | size -= size / recordsize * sizeof (blkptr_t); | |
672 | ||
673 | /* Add in the space for the record associated with each block. */ | |
674 | size += size / recordsize * sizeof (dmu_replay_record_t); | |
675 | ||
676 | *sizep = size; | |
677 | ||
678 | return (0); | |
679 | } | |
680 | ||
13fe0198 MA |
681 | typedef struct dmu_recv_begin_arg { |
682 | const char *drba_origin; | |
683 | dmu_recv_cookie_t *drba_cookie; | |
684 | cred_t *drba_cred; | |
19580676 | 685 | uint64_t drba_snapobj; |
13fe0198 | 686 | } dmu_recv_begin_arg_t; |
34dc7c2f | 687 | |
34dc7c2f | 688 | static int |
13fe0198 MA |
689 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, |
690 | uint64_t fromguid) | |
34dc7c2f | 691 | { |
34dc7c2f | 692 | uint64_t val; |
13fe0198 MA |
693 | int error; |
694 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
34dc7c2f | 695 | |
13fe0198 MA |
696 | /* temporary clone name must not exist */ |
697 | error = zap_lookup(dp->dp_meta_objset, | |
698 | ds->ds_dir->dd_phys->dd_child_dir_zapobj, recv_clone_name, | |
699 | 8, 1, &val); | |
700 | if (error != ENOENT) | |
701 | return (error == 0 ? EBUSY : error); | |
702 | ||
572e2857 | 703 | /* new snapshot name must not exist */ |
13fe0198 MA |
704 | error = zap_lookup(dp->dp_meta_objset, |
705 | ds->ds_phys->ds_snapnames_zapobj, drba->drba_cookie->drc_tosnap, | |
706 | 8, 1, &val); | |
707 | if (error != ENOENT) | |
708 | return (error == 0 ? EEXIST : error); | |
572e2857 | 709 | |
13fe0198 | 710 | if (fromguid != 0) { |
19580676 MA |
711 | dsl_dataset_t *snap; |
712 | uint64_t obj = ds->ds_phys->ds_prev_snap_obj; | |
713 | ||
714 | /* Find snapshot in this dir that matches fromguid. */ | |
715 | while (obj != 0) { | |
716 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
717 | &snap); | |
718 | if (error != 0) | |
719 | return (SET_ERROR(ENODEV)); | |
720 | if (snap->ds_dir != ds->ds_dir) { | |
721 | dsl_dataset_rele(snap, FTAG); | |
722 | return (SET_ERROR(ENODEV)); | |
723 | } | |
724 | if (snap->ds_phys->ds_guid == fromguid) | |
725 | break; | |
726 | obj = snap->ds_phys->ds_prev_snap_obj; | |
727 | dsl_dataset_rele(snap, FTAG); | |
728 | } | |
729 | if (obj == 0) | |
2e528b49 | 730 | return (SET_ERROR(ENODEV)); |
34dc7c2f | 731 | |
19580676 MA |
732 | if (drba->drba_cookie->drc_force) { |
733 | drba->drba_snapobj = obj; | |
734 | } else { | |
735 | /* | |
736 | * If we are not forcing, there must be no | |
737 | * changes since fromsnap. | |
738 | */ | |
739 | if (dsl_dataset_modified_since_snap(ds, snap)) { | |
428870ff | 740 | dsl_dataset_rele(snap, FTAG); |
19580676 | 741 | return (SET_ERROR(ETXTBSY)); |
428870ff | 742 | } |
19580676 | 743 | drba->drba_snapobj = ds->ds_prev->ds_object; |
428870ff | 744 | } |
19580676 MA |
745 | |
746 | dsl_dataset_rele(snap, FTAG); | |
428870ff BB |
747 | } else { |
748 | /* if full, most recent snapshot must be $ORIGIN */ | |
749 | if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL) | |
2e528b49 | 750 | return (SET_ERROR(ENODEV)); |
19580676 | 751 | drba->drba_snapobj = ds->ds_phys->ds_prev_snap_obj; |
428870ff | 752 | } |
34dc7c2f | 753 | |
34dc7c2f | 754 | return (0); |
13fe0198 MA |
755 | |
756 | } | |
757 | ||
758 | static int | |
759 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
760 | { | |
761 | dmu_recv_begin_arg_t *drba = arg; | |
762 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
763 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
764 | uint64_t fromguid = drrb->drr_fromguid; | |
765 | int flags = drrb->drr_flags; | |
766 | int error; | |
767 | dsl_dataset_t *ds; | |
768 | const char *tofs = drba->drba_cookie->drc_tofs; | |
769 | ||
770 | /* already checked */ | |
771 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
772 | ||
773 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
774 | DMU_COMPOUNDSTREAM || | |
775 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
776 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
2e528b49 | 777 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
778 | |
779 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
780 | if ((DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & | |
781 | DMU_BACKUP_FEATURE_SA_SPILL) && | |
782 | spa_version(dp->dp_spa) < SPA_VERSION_SA) { | |
2e528b49 | 783 | return (SET_ERROR(ENOTSUP)); |
13fe0198 MA |
784 | } |
785 | ||
786 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); | |
787 | if (error == 0) { | |
788 | /* target fs already exists; recv into temp clone */ | |
789 | ||
790 | /* Can't recv a clone into an existing fs */ | |
791 | if (flags & DRR_FLAG_CLONE) { | |
792 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 793 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
794 | } |
795 | ||
796 | error = recv_begin_check_existing_impl(drba, ds, fromguid); | |
797 | dsl_dataset_rele(ds, FTAG); | |
798 | } else if (error == ENOENT) { | |
799 | /* target fs does not exist; must be a full backup or clone */ | |
800 | char buf[MAXNAMELEN]; | |
801 | ||
802 | /* | |
803 | * If it's a non-clone incremental, we are missing the | |
804 | * target fs, so fail the recv. | |
805 | */ | |
806 | if (fromguid != 0 && !(flags & DRR_FLAG_CLONE)) | |
2e528b49 | 807 | return (SET_ERROR(ENOENT)); |
13fe0198 MA |
808 | |
809 | /* Open the parent of tofs */ | |
810 | ASSERT3U(strlen(tofs), <, MAXNAMELEN); | |
811 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); | |
812 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); | |
813 | if (error != 0) | |
814 | return (error); | |
815 | ||
816 | if (drba->drba_origin != NULL) { | |
817 | dsl_dataset_t *origin; | |
818 | error = dsl_dataset_hold(dp, drba->drba_origin, | |
819 | FTAG, &origin); | |
820 | if (error != 0) { | |
821 | dsl_dataset_rele(ds, FTAG); | |
822 | return (error); | |
823 | } | |
824 | if (!dsl_dataset_is_snapshot(origin)) { | |
825 | dsl_dataset_rele(origin, FTAG); | |
826 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 827 | return (SET_ERROR(EINVAL)); |
13fe0198 MA |
828 | } |
829 | if (origin->ds_phys->ds_guid != fromguid) { | |
830 | dsl_dataset_rele(origin, FTAG); | |
831 | dsl_dataset_rele(ds, FTAG); | |
2e528b49 | 832 | return (SET_ERROR(ENODEV)); |
13fe0198 MA |
833 | } |
834 | dsl_dataset_rele(origin, FTAG); | |
835 | } | |
836 | dsl_dataset_rele(ds, FTAG); | |
837 | error = 0; | |
838 | } | |
839 | return (error); | |
34dc7c2f BB |
840 | } |
841 | ||
34dc7c2f | 842 | static void |
13fe0198 | 843 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 844 | { |
13fe0198 MA |
845 | dmu_recv_begin_arg_t *drba = arg; |
846 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
847 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
848 | const char *tofs = drba->drba_cookie->drc_tofs; | |
849 | dsl_dataset_t *ds, *newds; | |
34dc7c2f | 850 | uint64_t dsobj; |
13fe0198 MA |
851 | int error; |
852 | uint64_t crflags; | |
853 | ||
854 | crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? | |
855 | DS_FLAG_CI_DATASET : 0; | |
34dc7c2f | 856 | |
13fe0198 MA |
857 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
858 | if (error == 0) { | |
859 | /* create temporary clone */ | |
19580676 MA |
860 | dsl_dataset_t *snap = NULL; |
861 | if (drba->drba_snapobj != 0) { | |
862 | VERIFY0(dsl_dataset_hold_obj(dp, | |
863 | drba->drba_snapobj, FTAG, &snap)); | |
864 | } | |
13fe0198 | 865 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, |
19580676 MA |
866 | snap, crflags, drba->drba_cred, tx); |
867 | dsl_dataset_rele(snap, FTAG); | |
13fe0198 MA |
868 | dsl_dataset_rele(ds, FTAG); |
869 | } else { | |
870 | dsl_dir_t *dd; | |
871 | const char *tail; | |
872 | dsl_dataset_t *origin = NULL; | |
873 | ||
874 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
875 | ||
876 | if (drba->drba_origin != NULL) { | |
877 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
878 | FTAG, &origin)); | |
879 | } | |
880 | ||
881 | /* Create new dataset. */ | |
882 | dsobj = dsl_dataset_create_sync(dd, | |
883 | strrchr(tofs, '/') + 1, | |
884 | origin, crflags, drba->drba_cred, tx); | |
885 | if (origin != NULL) | |
886 | dsl_dataset_rele(origin, FTAG); | |
887 | dsl_dir_rele(dd, FTAG); | |
888 | drba->drba_cookie->drc_newfs = B_TRUE; | |
889 | } | |
890 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); | |
891 | ||
892 | dmu_buf_will_dirty(newds->ds_dbuf, tx); | |
893 | newds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
34dc7c2f | 894 | |
428870ff BB |
895 | /* |
896 | * If we actually created a non-clone, we need to create the | |
897 | * objset in our new dataset. | |
898 | */ | |
13fe0198 | 899 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { |
428870ff | 900 | (void) dmu_objset_create_impl(dp->dp_spa, |
13fe0198 | 901 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); |
428870ff | 902 | } |
34dc7c2f | 903 | |
13fe0198 | 904 | drba->drba_cookie->drc_ds = newds; |
428870ff | 905 | |
13fe0198 | 906 | spa_history_log_internal_ds(newds, "receive", tx, ""); |
34dc7c2f BB |
907 | } |
908 | ||
34dc7c2f BB |
909 | /* |
910 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
911 | * succeeds; otherwise we will leak the holds on the datasets. | |
912 | */ | |
913 | int | |
13fe0198 MA |
914 | dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, |
915 | boolean_t force, char *origin, dmu_recv_cookie_t *drc) | |
34dc7c2f | 916 | { |
13fe0198 MA |
917 | dmu_recv_begin_arg_t drba = { 0 }; |
918 | dmu_replay_record_t *drr; | |
34dc7c2f BB |
919 | |
920 | bzero(drc, sizeof (dmu_recv_cookie_t)); | |
921 | drc->drc_drrb = drrb; | |
922 | drc->drc_tosnap = tosnap; | |
13fe0198 | 923 | drc->drc_tofs = tofs; |
34dc7c2f BB |
924 | drc->drc_force = force; |
925 | ||
13fe0198 MA |
926 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) |
927 | drc->drc_byteswap = B_TRUE; | |
928 | else if (drrb->drr_magic != DMU_BACKUP_MAGIC) | |
2e528b49 | 929 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 930 | |
13fe0198 MA |
931 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
932 | drr->drr_type = DRR_BEGIN; | |
933 | drr->drr_u.drr_begin = *drc->drc_drrb; | |
934 | if (drc->drc_byteswap) { | |
935 | fletcher_4_incremental_byteswap(drr, | |
936 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
937 | } else { | |
938 | fletcher_4_incremental_native(drr, | |
939 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
940 | } | |
941 | kmem_free(drr, sizeof (dmu_replay_record_t)); | |
428870ff | 942 | |
13fe0198 MA |
943 | if (drc->drc_byteswap) { |
944 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
945 | drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); | |
946 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); | |
947 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
948 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
949 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
34dc7c2f BB |
950 | } |
951 | ||
13fe0198 MA |
952 | drba.drba_origin = origin; |
953 | drba.drba_cookie = drc; | |
954 | drba.drba_cred = CRED(); | |
955 | ||
956 | return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, | |
957 | &drba, 5)); | |
34dc7c2f BB |
958 | } |
959 | ||
960 | struct restorearg { | |
961 | int err; | |
13fe0198 | 962 | boolean_t byteswap; |
34dc7c2f BB |
963 | vnode_t *vp; |
964 | char *buf; | |
965 | uint64_t voff; | |
966 | int bufsize; /* amount of memory allocated for buf */ | |
967 | zio_cksum_t cksum; | |
572e2857 | 968 | avl_tree_t *guid_to_ds_map; |
34dc7c2f BB |
969 | }; |
970 | ||
428870ff BB |
971 | typedef struct guid_map_entry { |
972 | uint64_t guid; | |
973 | dsl_dataset_t *gme_ds; | |
974 | avl_node_t avlnode; | |
975 | } guid_map_entry_t; | |
976 | ||
977 | static int | |
978 | guid_compare(const void *arg1, const void *arg2) | |
979 | { | |
980 | const guid_map_entry_t *gmep1 = arg1; | |
981 | const guid_map_entry_t *gmep2 = arg2; | |
982 | ||
983 | if (gmep1->guid < gmep2->guid) | |
984 | return (-1); | |
985 | else if (gmep1->guid > gmep2->guid) | |
986 | return (1); | |
987 | return (0); | |
988 | } | |
989 | ||
572e2857 BB |
990 | static void |
991 | free_guid_map_onexit(void *arg) | |
992 | { | |
993 | avl_tree_t *ca = arg; | |
994 | void *cookie = NULL; | |
995 | guid_map_entry_t *gmep; | |
996 | ||
997 | while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { | |
13fe0198 | 998 | dsl_dataset_long_rele(gmep->gme_ds, gmep); |
7ec09286 | 999 | dsl_dataset_rele(gmep->gme_ds, gmep); |
572e2857 BB |
1000 | kmem_free(gmep, sizeof (guid_map_entry_t)); |
1001 | } | |
1002 | avl_destroy(ca); | |
1003 | kmem_free(ca, sizeof (avl_tree_t)); | |
1004 | } | |
1005 | ||
34dc7c2f BB |
1006 | static void * |
1007 | restore_read(struct restorearg *ra, int len) | |
1008 | { | |
1009 | void *rv; | |
1010 | int done = 0; | |
1011 | ||
1012 | /* some things will require 8-byte alignment, so everything must */ | |
c99c9001 | 1013 | ASSERT0(len % 8); |
34dc7c2f BB |
1014 | |
1015 | while (done < len) { | |
1016 | ssize_t resid; | |
1017 | ||
1018 | ra->err = vn_rdwr(UIO_READ, ra->vp, | |
1019 | (caddr_t)ra->buf + done, len - done, | |
1020 | ra->voff, UIO_SYSSPACE, FAPPEND, | |
1021 | RLIM64_INFINITY, CRED(), &resid); | |
1022 | ||
1023 | if (resid == len - done) | |
2e528b49 | 1024 | ra->err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1025 | ra->voff += len - done - resid; |
1026 | done = len - resid; | |
13fe0198 | 1027 | if (ra->err != 0) |
34dc7c2f BB |
1028 | return (NULL); |
1029 | } | |
1030 | ||
1031 | ASSERT3U(done, ==, len); | |
1032 | rv = ra->buf; | |
1033 | if (ra->byteswap) | |
1034 | fletcher_4_incremental_byteswap(rv, len, &ra->cksum); | |
1035 | else | |
1036 | fletcher_4_incremental_native(rv, len, &ra->cksum); | |
1037 | return (rv); | |
1038 | } | |
1039 | ||
60948de1 | 1040 | noinline static void |
34dc7c2f BB |
1041 | backup_byteswap(dmu_replay_record_t *drr) |
1042 | { | |
1043 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
1044 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
1045 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1046 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
1047 | switch (drr->drr_type) { | |
1048 | case DRR_BEGIN: | |
1049 | DO64(drr_begin.drr_magic); | |
428870ff | 1050 | DO64(drr_begin.drr_versioninfo); |
34dc7c2f BB |
1051 | DO64(drr_begin.drr_creation_time); |
1052 | DO32(drr_begin.drr_type); | |
1053 | DO32(drr_begin.drr_flags); | |
1054 | DO64(drr_begin.drr_toguid); | |
1055 | DO64(drr_begin.drr_fromguid); | |
1056 | break; | |
1057 | case DRR_OBJECT: | |
1058 | DO64(drr_object.drr_object); | |
1059 | /* DO64(drr_object.drr_allocation_txg); */ | |
1060 | DO32(drr_object.drr_type); | |
1061 | DO32(drr_object.drr_bonustype); | |
1062 | DO32(drr_object.drr_blksz); | |
1063 | DO32(drr_object.drr_bonuslen); | |
428870ff | 1064 | DO64(drr_object.drr_toguid); |
34dc7c2f BB |
1065 | break; |
1066 | case DRR_FREEOBJECTS: | |
1067 | DO64(drr_freeobjects.drr_firstobj); | |
1068 | DO64(drr_freeobjects.drr_numobjs); | |
428870ff | 1069 | DO64(drr_freeobjects.drr_toguid); |
34dc7c2f BB |
1070 | break; |
1071 | case DRR_WRITE: | |
1072 | DO64(drr_write.drr_object); | |
1073 | DO32(drr_write.drr_type); | |
1074 | DO64(drr_write.drr_offset); | |
1075 | DO64(drr_write.drr_length); | |
428870ff BB |
1076 | DO64(drr_write.drr_toguid); |
1077 | DO64(drr_write.drr_key.ddk_cksum.zc_word[0]); | |
1078 | DO64(drr_write.drr_key.ddk_cksum.zc_word[1]); | |
1079 | DO64(drr_write.drr_key.ddk_cksum.zc_word[2]); | |
1080 | DO64(drr_write.drr_key.ddk_cksum.zc_word[3]); | |
1081 | DO64(drr_write.drr_key.ddk_prop); | |
1082 | break; | |
1083 | case DRR_WRITE_BYREF: | |
1084 | DO64(drr_write_byref.drr_object); | |
1085 | DO64(drr_write_byref.drr_offset); | |
1086 | DO64(drr_write_byref.drr_length); | |
1087 | DO64(drr_write_byref.drr_toguid); | |
1088 | DO64(drr_write_byref.drr_refguid); | |
1089 | DO64(drr_write_byref.drr_refobject); | |
1090 | DO64(drr_write_byref.drr_refoffset); | |
1091 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]); | |
1092 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]); | |
1093 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]); | |
1094 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]); | |
1095 | DO64(drr_write_byref.drr_key.ddk_prop); | |
34dc7c2f BB |
1096 | break; |
1097 | case DRR_FREE: | |
1098 | DO64(drr_free.drr_object); | |
1099 | DO64(drr_free.drr_offset); | |
1100 | DO64(drr_free.drr_length); | |
428870ff BB |
1101 | DO64(drr_free.drr_toguid); |
1102 | break; | |
1103 | case DRR_SPILL: | |
1104 | DO64(drr_spill.drr_object); | |
1105 | DO64(drr_spill.drr_length); | |
1106 | DO64(drr_spill.drr_toguid); | |
34dc7c2f BB |
1107 | break; |
1108 | case DRR_END: | |
1109 | DO64(drr_end.drr_checksum.zc_word[0]); | |
1110 | DO64(drr_end.drr_checksum.zc_word[1]); | |
1111 | DO64(drr_end.drr_checksum.zc_word[2]); | |
1112 | DO64(drr_end.drr_checksum.zc_word[3]); | |
428870ff | 1113 | DO64(drr_end.drr_toguid); |
34dc7c2f | 1114 | break; |
e75c13c3 BB |
1115 | default: |
1116 | break; | |
34dc7c2f BB |
1117 | } |
1118 | #undef DO64 | |
1119 | #undef DO32 | |
1120 | } | |
1121 | ||
60948de1 | 1122 | noinline static int |
34dc7c2f BB |
1123 | restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) |
1124 | { | |
1125 | int err; | |
1126 | dmu_tx_t *tx; | |
b128c09f | 1127 | void *data = NULL; |
34dc7c2f | 1128 | |
34dc7c2f | 1129 | if (drro->drr_type == DMU_OT_NONE || |
9ae529ec CS |
1130 | !DMU_OT_IS_VALID(drro->drr_type) || |
1131 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
428870ff | 1132 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || |
34dc7c2f BB |
1133 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || |
1134 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
1135 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
1136 | drro->drr_blksz > SPA_MAXBLOCKSIZE || | |
1137 | drro->drr_bonuslen > DN_MAX_BONUSLEN) { | |
2e528b49 | 1138 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1139 | } |
1140 | ||
9babb374 BB |
1141 | err = dmu_object_info(os, drro->drr_object, NULL); |
1142 | ||
1143 | if (err != 0 && err != ENOENT) | |
2e528b49 | 1144 | return (SET_ERROR(EINVAL)); |
9babb374 | 1145 | |
b128c09f BB |
1146 | if (drro->drr_bonuslen) { |
1147 | data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8)); | |
13fe0198 | 1148 | if (ra->err != 0) |
b128c09f BB |
1149 | return (ra->err); |
1150 | } | |
1151 | ||
34dc7c2f BB |
1152 | if (err == ENOENT) { |
1153 | /* currently free, want to be allocated */ | |
9babb374 | 1154 | tx = dmu_tx_create(os); |
34dc7c2f | 1155 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); |
34dc7c2f | 1156 | err = dmu_tx_assign(tx, TXG_WAIT); |
13fe0198 | 1157 | if (err != 0) { |
34dc7c2f BB |
1158 | dmu_tx_abort(tx); |
1159 | return (err); | |
1160 | } | |
1161 | err = dmu_object_claim(os, drro->drr_object, | |
1162 | drro->drr_type, drro->drr_blksz, | |
1163 | drro->drr_bonustype, drro->drr_bonuslen, tx); | |
9babb374 | 1164 | dmu_tx_commit(tx); |
34dc7c2f BB |
1165 | } else { |
1166 | /* currently allocated, want to be allocated */ | |
34dc7c2f BB |
1167 | err = dmu_object_reclaim(os, drro->drr_object, |
1168 | drro->drr_type, drro->drr_blksz, | |
9babb374 | 1169 | drro->drr_bonustype, drro->drr_bonuslen); |
34dc7c2f | 1170 | } |
13fe0198 | 1171 | if (err != 0) { |
2e528b49 | 1172 | return (SET_ERROR(EINVAL)); |
428870ff | 1173 | } |
9babb374 BB |
1174 | |
1175 | tx = dmu_tx_create(os); | |
1176 | dmu_tx_hold_bonus(tx, drro->drr_object); | |
1177 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1178 | if (err != 0) { |
9babb374 BB |
1179 | dmu_tx_abort(tx); |
1180 | return (err); | |
34dc7c2f BB |
1181 | } |
1182 | ||
428870ff BB |
1183 | dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype, |
1184 | tx); | |
34dc7c2f BB |
1185 | dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx); |
1186 | ||
b128c09f | 1187 | if (data != NULL) { |
34dc7c2f | 1188 | dmu_buf_t *db; |
b128c09f | 1189 | |
34dc7c2f BB |
1190 | VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db)); |
1191 | dmu_buf_will_dirty(db, tx); | |
1192 | ||
1193 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
34dc7c2f BB |
1194 | bcopy(data, db->db_data, drro->drr_bonuslen); |
1195 | if (ra->byteswap) { | |
9ae529ec CS |
1196 | dmu_object_byteswap_t byteswap = |
1197 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
1198 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
34dc7c2f BB |
1199 | drro->drr_bonuslen); |
1200 | } | |
1201 | dmu_buf_rele(db, FTAG); | |
1202 | } | |
1203 | dmu_tx_commit(tx); | |
1204 | return (0); | |
1205 | } | |
1206 | ||
1207 | /* ARGSUSED */ | |
60948de1 | 1208 | noinline static int |
34dc7c2f BB |
1209 | restore_freeobjects(struct restorearg *ra, objset_t *os, |
1210 | struct drr_freeobjects *drrfo) | |
1211 | { | |
1212 | uint64_t obj; | |
1213 | ||
1214 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
2e528b49 | 1215 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1216 | |
1217 | for (obj = drrfo->drr_firstobj; | |
1218 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs; | |
1219 | (void) dmu_object_next(os, &obj, FALSE, 0)) { | |
34dc7c2f BB |
1220 | int err; |
1221 | ||
1222 | if (dmu_object_info(os, obj, NULL) != 0) | |
1223 | continue; | |
1224 | ||
b128c09f | 1225 | err = dmu_free_object(os, obj); |
13fe0198 | 1226 | if (err != 0) |
34dc7c2f | 1227 | return (err); |
34dc7c2f BB |
1228 | } |
1229 | return (0); | |
1230 | } | |
1231 | ||
60948de1 | 1232 | noinline static int |
34dc7c2f BB |
1233 | restore_write(struct restorearg *ra, objset_t *os, |
1234 | struct drr_write *drrw) | |
1235 | { | |
1236 | dmu_tx_t *tx; | |
1237 | void *data; | |
1238 | int err; | |
1239 | ||
1240 | if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || | |
9ae529ec | 1241 | !DMU_OT_IS_VALID(drrw->drr_type)) |
2e528b49 | 1242 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1243 | |
1244 | data = restore_read(ra, drrw->drr_length); | |
1245 | if (data == NULL) | |
1246 | return (ra->err); | |
1247 | ||
1248 | if (dmu_object_info(os, drrw->drr_object, NULL) != 0) | |
2e528b49 | 1249 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1250 | |
1251 | tx = dmu_tx_create(os); | |
1252 | ||
1253 | dmu_tx_hold_write(tx, drrw->drr_object, | |
1254 | drrw->drr_offset, drrw->drr_length); | |
1255 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1256 | if (err != 0) { |
34dc7c2f BB |
1257 | dmu_tx_abort(tx); |
1258 | return (err); | |
1259 | } | |
9ae529ec CS |
1260 | if (ra->byteswap) { |
1261 | dmu_object_byteswap_t byteswap = | |
1262 | DMU_OT_BYTESWAP(drrw->drr_type); | |
1263 | dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length); | |
1264 | } | |
34dc7c2f BB |
1265 | dmu_write(os, drrw->drr_object, |
1266 | drrw->drr_offset, drrw->drr_length, data, tx); | |
1267 | dmu_tx_commit(tx); | |
1268 | return (0); | |
1269 | } | |
1270 | ||
428870ff BB |
1271 | /* |
1272 | * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed | |
1273 | * streams to refer to a copy of the data that is already on the | |
1274 | * system because it came in earlier in the stream. This function | |
1275 | * finds the earlier copy of the data, and uses that copy instead of | |
1276 | * data from the stream to fulfill this write. | |
1277 | */ | |
1278 | static int | |
1279 | restore_write_byref(struct restorearg *ra, objset_t *os, | |
1280 | struct drr_write_byref *drrwbr) | |
1281 | { | |
1282 | dmu_tx_t *tx; | |
1283 | int err; | |
1284 | guid_map_entry_t gmesrch; | |
1285 | guid_map_entry_t *gmep; | |
1286 | avl_index_t where; | |
1287 | objset_t *ref_os = NULL; | |
1288 | dmu_buf_t *dbp; | |
1289 | ||
1290 | if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) | |
2e528b49 | 1291 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1292 | |
1293 | /* | |
1294 | * If the GUID of the referenced dataset is different from the | |
1295 | * GUID of the target dataset, find the referenced dataset. | |
1296 | */ | |
1297 | if (drrwbr->drr_toguid != drrwbr->drr_refguid) { | |
1298 | gmesrch.guid = drrwbr->drr_refguid; | |
572e2857 | 1299 | if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch, |
428870ff | 1300 | &where)) == NULL) { |
2e528b49 | 1301 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1302 | } |
1303 | if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) | |
2e528b49 | 1304 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1305 | } else { |
1306 | ref_os = os; | |
1307 | } | |
1308 | ||
c65aa5b2 BB |
1309 | err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, |
1310 | drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); | |
1311 | if (err) | |
428870ff BB |
1312 | return (err); |
1313 | ||
1314 | tx = dmu_tx_create(os); | |
1315 | ||
1316 | dmu_tx_hold_write(tx, drrwbr->drr_object, | |
1317 | drrwbr->drr_offset, drrwbr->drr_length); | |
1318 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1319 | if (err != 0) { |
428870ff BB |
1320 | dmu_tx_abort(tx); |
1321 | return (err); | |
1322 | } | |
1323 | dmu_write(os, drrwbr->drr_object, | |
1324 | drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); | |
1325 | dmu_buf_rele(dbp, FTAG); | |
1326 | dmu_tx_commit(tx); | |
1327 | return (0); | |
1328 | } | |
1329 | ||
1330 | static int | |
1331 | restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs) | |
1332 | { | |
1333 | dmu_tx_t *tx; | |
1334 | void *data; | |
1335 | dmu_buf_t *db, *db_spill; | |
1336 | int err; | |
1337 | ||
1338 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
1339 | drrs->drr_length > SPA_MAXBLOCKSIZE) | |
2e528b49 | 1340 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1341 | |
1342 | data = restore_read(ra, drrs->drr_length); | |
1343 | if (data == NULL) | |
1344 | return (ra->err); | |
1345 | ||
1346 | if (dmu_object_info(os, drrs->drr_object, NULL) != 0) | |
2e528b49 | 1347 | return (SET_ERROR(EINVAL)); |
428870ff BB |
1348 | |
1349 | VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db)); | |
1350 | if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { | |
1351 | dmu_buf_rele(db, FTAG); | |
1352 | return (err); | |
1353 | } | |
1354 | ||
1355 | tx = dmu_tx_create(os); | |
1356 | ||
1357 | dmu_tx_hold_spill(tx, db->db_object); | |
1358 | ||
1359 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1360 | if (err != 0) { |
428870ff BB |
1361 | dmu_buf_rele(db, FTAG); |
1362 | dmu_buf_rele(db_spill, FTAG); | |
1363 | dmu_tx_abort(tx); | |
1364 | return (err); | |
1365 | } | |
1366 | dmu_buf_will_dirty(db_spill, tx); | |
1367 | ||
1368 | if (db_spill->db_size < drrs->drr_length) | |
1369 | VERIFY(0 == dbuf_spill_set_blksz(db_spill, | |
1370 | drrs->drr_length, tx)); | |
1371 | bcopy(data, db_spill->db_data, drrs->drr_length); | |
1372 | ||
1373 | dmu_buf_rele(db, FTAG); | |
1374 | dmu_buf_rele(db_spill, FTAG); | |
1375 | ||
1376 | dmu_tx_commit(tx); | |
1377 | return (0); | |
1378 | } | |
1379 | ||
34dc7c2f | 1380 | /* ARGSUSED */ |
60948de1 | 1381 | noinline static int |
34dc7c2f BB |
1382 | restore_free(struct restorearg *ra, objset_t *os, |
1383 | struct drr_free *drrf) | |
1384 | { | |
34dc7c2f BB |
1385 | int err; |
1386 | ||
1387 | if (drrf->drr_length != -1ULL && | |
1388 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) | |
2e528b49 | 1389 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
1390 | |
1391 | if (dmu_object_info(os, drrf->drr_object, NULL) != 0) | |
2e528b49 | 1392 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 1393 | |
b128c09f | 1394 | err = dmu_free_long_range(os, drrf->drr_object, |
34dc7c2f | 1395 | drrf->drr_offset, drrf->drr_length); |
34dc7c2f BB |
1396 | return (err); |
1397 | } | |
1398 | ||
13fe0198 MA |
1399 | /* used to destroy the drc_ds on error */ |
1400 | static void | |
1401 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
1402 | { | |
1403 | char name[MAXNAMELEN]; | |
1404 | dsl_dataset_name(drc->drc_ds, name); | |
1405 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1406 | (void) dsl_destroy_head(name); | |
1407 | } | |
1408 | ||
34dc7c2f BB |
1409 | /* |
1410 | * NB: callers *must* call dmu_recv_end() if this succeeds. | |
1411 | */ | |
1412 | int | |
572e2857 BB |
1413 | dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, |
1414 | int cleanup_fd, uint64_t *action_handlep) | |
34dc7c2f BB |
1415 | { |
1416 | struct restorearg ra = { 0 }; | |
1417 | dmu_replay_record_t *drr; | |
1418 | objset_t *os; | |
1419 | zio_cksum_t pcksum; | |
428870ff | 1420 | int featureflags; |
34dc7c2f | 1421 | |
13fe0198 MA |
1422 | ra.byteswap = drc->drc_byteswap; |
1423 | ra.cksum = drc->drc_cksum; | |
34dc7c2f BB |
1424 | ra.vp = vp; |
1425 | ra.voff = *voffp; | |
1426 | ra.bufsize = 1<<20; | |
00b46022 | 1427 | ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP); |
34dc7c2f BB |
1428 | |
1429 | /* these were verified in dmu_recv_begin */ | |
13fe0198 | 1430 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, |
428870ff | 1431 | DMU_SUBSTREAM); |
13fe0198 | 1432 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); |
34dc7c2f BB |
1433 | |
1434 | /* | |
1435 | * Open the objset we are modifying. | |
1436 | */ | |
13fe0198 | 1437 | VERIFY0(dmu_objset_from_ds(drc->drc_ds, &os)); |
34dc7c2f | 1438 | |
13fe0198 | 1439 | ASSERT(drc->drc_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT); |
34dc7c2f | 1440 | |
428870ff BB |
1441 | featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); |
1442 | ||
1443 | /* if this stream is dedup'ed, set up the avl tree for guid mapping */ | |
1444 | if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { | |
572e2857 BB |
1445 | minor_t minor; |
1446 | ||
1447 | if (cleanup_fd == -1) { | |
2e528b49 | 1448 | ra.err = SET_ERROR(EBADF); |
572e2857 BB |
1449 | goto out; |
1450 | } | |
1451 | ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); | |
13fe0198 | 1452 | if (ra.err != 0) { |
572e2857 BB |
1453 | cleanup_fd = -1; |
1454 | goto out; | |
1455 | } | |
1456 | ||
1457 | if (*action_handlep == 0) { | |
1458 | ra.guid_to_ds_map = | |
1459 | kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); | |
1460 | avl_create(ra.guid_to_ds_map, guid_compare, | |
1461 | sizeof (guid_map_entry_t), | |
1462 | offsetof(guid_map_entry_t, avlnode)); | |
572e2857 BB |
1463 | ra.err = zfs_onexit_add_cb(minor, |
1464 | free_guid_map_onexit, ra.guid_to_ds_map, | |
1465 | action_handlep); | |
13fe0198 | 1466 | if (ra.err != 0) |
572e2857 BB |
1467 | goto out; |
1468 | } else { | |
1469 | ra.err = zfs_onexit_cb_data(minor, *action_handlep, | |
1470 | (void **)&ra.guid_to_ds_map); | |
13fe0198 | 1471 | if (ra.err != 0) |
572e2857 BB |
1472 | goto out; |
1473 | } | |
8d35c149 AS |
1474 | |
1475 | drc->drc_guid_to_ds_map = ra.guid_to_ds_map; | |
428870ff BB |
1476 | } |
1477 | ||
34dc7c2f BB |
1478 | /* |
1479 | * Read records and process them. | |
1480 | */ | |
1481 | pcksum = ra.cksum; | |
1482 | while (ra.err == 0 && | |
1483 | NULL != (drr = restore_read(&ra, sizeof (*drr)))) { | |
1484 | if (issig(JUSTLOOKING) && issig(FORREAL)) { | |
2e528b49 | 1485 | ra.err = SET_ERROR(EINTR); |
34dc7c2f BB |
1486 | goto out; |
1487 | } | |
1488 | ||
1489 | if (ra.byteswap) | |
1490 | backup_byteswap(drr); | |
1491 | ||
1492 | switch (drr->drr_type) { | |
1493 | case DRR_OBJECT: | |
1494 | { | |
1495 | /* | |
1496 | * We need to make a copy of the record header, | |
1497 | * because restore_{object,write} may need to | |
1498 | * restore_read(), which will invalidate drr. | |
1499 | */ | |
1500 | struct drr_object drro = drr->drr_u.drr_object; | |
1501 | ra.err = restore_object(&ra, os, &drro); | |
1502 | break; | |
1503 | } | |
1504 | case DRR_FREEOBJECTS: | |
1505 | { | |
1506 | struct drr_freeobjects drrfo = | |
1507 | drr->drr_u.drr_freeobjects; | |
1508 | ra.err = restore_freeobjects(&ra, os, &drrfo); | |
1509 | break; | |
1510 | } | |
1511 | case DRR_WRITE: | |
1512 | { | |
1513 | struct drr_write drrw = drr->drr_u.drr_write; | |
1514 | ra.err = restore_write(&ra, os, &drrw); | |
1515 | break; | |
1516 | } | |
428870ff BB |
1517 | case DRR_WRITE_BYREF: |
1518 | { | |
1519 | struct drr_write_byref drrwbr = | |
1520 | drr->drr_u.drr_write_byref; | |
1521 | ra.err = restore_write_byref(&ra, os, &drrwbr); | |
1522 | break; | |
1523 | } | |
34dc7c2f BB |
1524 | case DRR_FREE: |
1525 | { | |
1526 | struct drr_free drrf = drr->drr_u.drr_free; | |
1527 | ra.err = restore_free(&ra, os, &drrf); | |
1528 | break; | |
1529 | } | |
1530 | case DRR_END: | |
1531 | { | |
1532 | struct drr_end drre = drr->drr_u.drr_end; | |
1533 | /* | |
1534 | * We compare against the *previous* checksum | |
1535 | * value, because the stored checksum is of | |
1536 | * everything before the DRR_END record. | |
1537 | */ | |
1538 | if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum)) | |
2e528b49 | 1539 | ra.err = SET_ERROR(ECKSUM); |
34dc7c2f BB |
1540 | goto out; |
1541 | } | |
428870ff BB |
1542 | case DRR_SPILL: |
1543 | { | |
1544 | struct drr_spill drrs = drr->drr_u.drr_spill; | |
1545 | ra.err = restore_spill(&ra, os, &drrs); | |
1546 | break; | |
1547 | } | |
34dc7c2f | 1548 | default: |
2e528b49 | 1549 | ra.err = SET_ERROR(EINVAL); |
34dc7c2f BB |
1550 | goto out; |
1551 | } | |
1552 | pcksum = ra.cksum; | |
1553 | } | |
1554 | ASSERT(ra.err != 0); | |
1555 | ||
1556 | out: | |
572e2857 BB |
1557 | if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) |
1558 | zfs_onexit_fd_rele(cleanup_fd); | |
1559 | ||
34dc7c2f BB |
1560 | if (ra.err != 0) { |
1561 | /* | |
45d1cae3 BB |
1562 | * destroy what we created, so we don't leave it in the |
1563 | * inconsistent restoring state. | |
34dc7c2f | 1564 | */ |
13fe0198 | 1565 | dmu_recv_cleanup_ds(drc); |
34dc7c2f BB |
1566 | } |
1567 | ||
00b46022 | 1568 | vmem_free(ra.buf, ra.bufsize); |
34dc7c2f BB |
1569 | *voffp = ra.voff; |
1570 | return (ra.err); | |
1571 | } | |
1572 | ||
34dc7c2f | 1573 | static int |
13fe0198 | 1574 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1575 | { |
13fe0198 MA |
1576 | dmu_recv_cookie_t *drc = arg; |
1577 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1578 | int error; | |
1579 | ||
1580 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
1581 | ||
1582 | if (!drc->drc_newfs) { | |
1583 | dsl_dataset_t *origin_head; | |
1584 | ||
1585 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
1586 | if (error != 0) | |
1587 | return (error); | |
19580676 MA |
1588 | if (drc->drc_force) { |
1589 | /* | |
1590 | * We will destroy any snapshots in tofs (i.e. before | |
1591 | * origin_head) that are after the origin (which is | |
1592 | * the snap before drc_ds, because drc_ds can not | |
1593 | * have any snaps of its own). | |
1594 | */ | |
1595 | uint64_t obj = origin_head->ds_phys->ds_prev_snap_obj; | |
1596 | while (obj != drc->drc_ds->ds_phys->ds_prev_snap_obj) { | |
1597 | dsl_dataset_t *snap; | |
1598 | error = dsl_dataset_hold_obj(dp, obj, FTAG, | |
1599 | &snap); | |
1600 | if (error != 0) | |
1601 | return (error); | |
1602 | if (snap->ds_dir != origin_head->ds_dir) | |
1603 | error = SET_ERROR(EINVAL); | |
1604 | if (error == 0) { | |
1605 | error = dsl_destroy_snapshot_check_impl( | |
1606 | snap, B_FALSE); | |
1607 | } | |
1608 | obj = snap->ds_phys->ds_prev_snap_obj; | |
1609 | dsl_dataset_rele(snap, FTAG); | |
1610 | if (error != 0) | |
1611 | return (error); | |
1612 | } | |
1613 | } | |
13fe0198 MA |
1614 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, |
1615 | origin_head, drc->drc_force); | |
1616 | if (error != 0) { | |
1617 | dsl_dataset_rele(origin_head, FTAG); | |
1618 | return (error); | |
1619 | } | |
1620 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
96c2e961 | 1621 | drc->drc_tosnap, tx, B_TRUE); |
13fe0198 MA |
1622 | dsl_dataset_rele(origin_head, FTAG); |
1623 | if (error != 0) | |
1624 | return (error); | |
34dc7c2f | 1625 | |
13fe0198 MA |
1626 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); |
1627 | } else { | |
1628 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
96c2e961 | 1629 | drc->drc_tosnap, tx, B_TRUE); |
13fe0198 MA |
1630 | } |
1631 | return (error); | |
34dc7c2f BB |
1632 | } |
1633 | ||
1634 | static void | |
13fe0198 | 1635 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1636 | { |
13fe0198 MA |
1637 | dmu_recv_cookie_t *drc = arg; |
1638 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1639 | ||
1640 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
1641 | tx, "snap=%s", drc->drc_tosnap); | |
1642 | ||
1643 | if (!drc->drc_newfs) { | |
1644 | dsl_dataset_t *origin_head; | |
1645 | ||
1646 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
1647 | &origin_head)); | |
19580676 MA |
1648 | |
1649 | if (drc->drc_force) { | |
1650 | /* | |
1651 | * Destroy any snapshots of drc_tofs (origin_head) | |
1652 | * after the origin (the snap before drc_ds). | |
1653 | */ | |
1654 | uint64_t obj = origin_head->ds_phys->ds_prev_snap_obj; | |
1655 | while (obj != drc->drc_ds->ds_phys->ds_prev_snap_obj) { | |
1656 | dsl_dataset_t *snap; | |
1657 | VERIFY0(dsl_dataset_hold_obj(dp, obj, FTAG, | |
1658 | &snap)); | |
1659 | ASSERT3P(snap->ds_dir, ==, origin_head->ds_dir); | |
1660 | obj = snap->ds_phys->ds_prev_snap_obj; | |
1661 | dsl_destroy_snapshot_sync_impl(snap, | |
1662 | B_FALSE, tx); | |
1663 | dsl_dataset_rele(snap, FTAG); | |
1664 | } | |
1665 | } | |
1666 | VERIFY3P(drc->drc_ds->ds_prev, ==, | |
1667 | origin_head->ds_prev); | |
1668 | ||
13fe0198 MA |
1669 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, |
1670 | origin_head, tx); | |
1671 | dsl_dataset_snapshot_sync_impl(origin_head, | |
1672 | drc->drc_tosnap, tx); | |
1673 | ||
1674 | /* set snapshot's creation time and guid */ | |
1675 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
1676 | origin_head->ds_prev->ds_phys->ds_creation_time = | |
1677 | drc->drc_drrb->drr_creation_time; | |
1678 | origin_head->ds_prev->ds_phys->ds_guid = | |
1679 | drc->drc_drrb->drr_toguid; | |
1680 | origin_head->ds_prev->ds_phys->ds_flags &= | |
1681 | ~DS_FLAG_INCONSISTENT; | |
1682 | ||
1683 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
1684 | origin_head->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1685 | ||
1686 | dsl_dataset_rele(origin_head, FTAG); | |
1687 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
1688 | } else { | |
1689 | dsl_dataset_t *ds = drc->drc_ds; | |
34dc7c2f | 1690 | |
13fe0198 | 1691 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); |
34dc7c2f | 1692 | |
13fe0198 MA |
1693 | /* set snapshot's creation time and guid */ |
1694 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
1695 | ds->ds_prev->ds_phys->ds_creation_time = | |
1696 | drc->drc_drrb->drr_creation_time; | |
1697 | ds->ds_prev->ds_phys->ds_guid = drc->drc_drrb->drr_toguid; | |
1698 | ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
34dc7c2f | 1699 | |
13fe0198 MA |
1700 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
1701 | ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1702 | } | |
1703 | drc->drc_newsnapobj = drc->drc_ds->ds_phys->ds_prev_snap_obj; | |
1704 | /* | |
1705 | * Release the hold from dmu_recv_begin. This must be done before | |
1706 | * we return to open context, so that when we free the dataset's dnode, | |
1707 | * we can evict its bonus buffer. | |
1708 | */ | |
1709 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1710 | drc->drc_ds = NULL; | |
34dc7c2f BB |
1711 | } |
1712 | ||
8d35c149 | 1713 | static int |
13fe0198 | 1714 | add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) |
8d35c149 | 1715 | { |
13fe0198 | 1716 | dsl_pool_t *dp; |
8d35c149 AS |
1717 | dsl_dataset_t *snapds; |
1718 | guid_map_entry_t *gmep; | |
1719 | int err; | |
1720 | ||
1721 | ASSERT(guid_map != NULL); | |
1722 | ||
13fe0198 MA |
1723 | err = dsl_pool_hold(name, FTAG, &dp); |
1724 | if (err != 0) | |
1725 | return (err); | |
7ec09286 MA |
1726 | gmep = kmem_alloc(sizeof (*gmep), KM_SLEEP); |
1727 | err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); | |
8d35c149 | 1728 | if (err == 0) { |
8d35c149 AS |
1729 | gmep->guid = snapds->ds_phys->ds_guid; |
1730 | gmep->gme_ds = snapds; | |
1731 | avl_add(guid_map, gmep); | |
13fe0198 | 1732 | dsl_dataset_long_hold(snapds, gmep); |
7ec09286 MA |
1733 | } else { |
1734 | kmem_free(gmep, sizeof (*gmep)); | |
8d35c149 AS |
1735 | } |
1736 | ||
13fe0198 | 1737 | dsl_pool_rele(dp, FTAG); |
8d35c149 AS |
1738 | return (err); |
1739 | } | |
1740 | ||
13fe0198 MA |
1741 | static int dmu_recv_end_modified_blocks = 3; |
1742 | ||
428870ff BB |
1743 | static int |
1744 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
34dc7c2f | 1745 | { |
13fe0198 | 1746 | int error; |
34dc7c2f | 1747 | |
13fe0198 MA |
1748 | #ifdef _KERNEL |
1749 | char *name; | |
34dc7c2f | 1750 | |
13fe0198 MA |
1751 | /* |
1752 | * We will be destroying the ds; make sure its origin is unmounted if | |
1753 | * necessary. | |
1754 | */ | |
1755 | name = kmem_alloc(MAXNAMELEN, KM_SLEEP); | |
1756 | dsl_dataset_name(drc->drc_ds, name); | |
1757 | zfs_destroy_unmount_origin(name); | |
1758 | kmem_free(name, MAXNAMELEN); | |
1759 | #endif | |
34dc7c2f | 1760 | |
13fe0198 MA |
1761 | error = dsl_sync_task(drc->drc_tofs, |
1762 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
1763 | dmu_recv_end_modified_blocks); | |
1764 | ||
1765 | if (error != 0) | |
1766 | dmu_recv_cleanup_ds(drc); | |
1767 | return (error); | |
34dc7c2f | 1768 | } |
428870ff BB |
1769 | |
1770 | static int | |
1771 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
1772 | { | |
13fe0198 | 1773 | int error; |
428870ff | 1774 | |
13fe0198 MA |
1775 | error = dsl_sync_task(drc->drc_tofs, |
1776 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
1777 | dmu_recv_end_modified_blocks); | |
428870ff | 1778 | |
13fe0198 MA |
1779 | if (error != 0) { |
1780 | dmu_recv_cleanup_ds(drc); | |
1781 | } else if (drc->drc_guid_to_ds_map != NULL) { | |
1782 | (void) add_ds_to_guidmap(drc->drc_tofs, | |
1783 | drc->drc_guid_to_ds_map, | |
1784 | drc->drc_newsnapobj); | |
428870ff | 1785 | } |
13fe0198 | 1786 | return (error); |
428870ff BB |
1787 | } |
1788 | ||
1789 | int | |
1790 | dmu_recv_end(dmu_recv_cookie_t *drc) | |
1791 | { | |
13fe0198 | 1792 | if (drc->drc_newfs) |
428870ff | 1793 | return (dmu_recv_new_end(drc)); |
13fe0198 MA |
1794 | else |
1795 | return (dmu_recv_existing_end(drc)); | |
428870ff | 1796 | } |