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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. |
330d06f9 | 25 | * Copyright (c) 2011 by Delphix. All rights reserved. |
37abac6d | 26 | * Copyright (c) 2012, Joyent, Inc. 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) | |
428870ff | 126 | return (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 BB |
149 | sizeof (dmu_replay_record_t)) != 0) |
150 | return (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) | |
428870ff BB |
164 | return (EINTR); |
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) | |
428870ff | 188 | return (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) |
428870ff | 208 | return (EINTR); |
37abac6d | 209 | if (dump_bytes(dsp, data, blksz) != 0) |
428870ff BB |
210 | return (EINTR); |
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) | |
428870ff | 222 | return (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))) |
34dc7c2f | 234 | return (EINTR); |
37abac6d | 235 | if (dump_bytes(dsp, data, blksz)) |
34dc7c2f BB |
236 | return (EINTR); |
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) | |
428870ff | 256 | return (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 BB |
270 | sizeof (dmu_replay_record_t)) != 0) |
271 | return (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) | |
428870ff | 299 | return (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) |
34dc7c2f BB |
316 | return (EINTR); |
317 | ||
37abac6d | 318 | if (dump_bytes(dsp, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0) |
34dc7c2f BB |
319 | return (EINTR); |
320 | ||
321 | /* free anything past the end of the file */ | |
37abac6d | 322 | if (dump_free(dsp, object, (dnp->dn_maxblkid + 1) * |
34dc7c2f BB |
323 | (dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL)) |
324 | return (EINTR); | |
13fe0198 | 325 | if (dsp->dsa_err != 0) |
34dc7c2f BB |
326 | return (EINTR); |
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)) | |
344 | return (EINTR); | |
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) | |
b128c09f | 368 | return (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) | |
b128c09f BB |
387 | return (EIO); |
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 MA |
408 | } else { |
409 | return (EIO); | |
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); | |
34dc7c2f | 439 | return (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); | |
428870ff | 466 | return (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 | ||
511 | if (dump_bytes(dsp, drr, sizeof (dmu_replay_record_t)) != 0) { | |
512 | err = dsp->dsa_err; | |
513 | goto out; | |
34dc7c2f BB |
514 | } |
515 | ||
13fe0198 MA |
516 | dsl_dataset_long_hold(ds, FTAG); |
517 | dsl_pool_rele(dp, tag); | |
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) | |
428870ff BB |
524 | err = EINTR; |
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) | |
597 | return (EINVAL); | |
598 | if (fromsnap != NULL && strchr(fromsnap, '@') == NULL) | |
599 | return (EINVAL); | |
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)) |
330d06f9 MA |
633 | return (EINVAL); |
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)) |
330d06f9 MA |
640 | return (EXDEV); |
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; | |
685 | } dmu_recv_begin_arg_t; | |
34dc7c2f | 686 | |
34dc7c2f | 687 | static int |
13fe0198 MA |
688 | recv_begin_check_existing_impl(dmu_recv_begin_arg_t *drba, dsl_dataset_t *ds, |
689 | uint64_t fromguid) | |
34dc7c2f | 690 | { |
34dc7c2f | 691 | uint64_t val; |
13fe0198 MA |
692 | int error; |
693 | dsl_pool_t *dp = ds->ds_dir->dd_pool; | |
34dc7c2f BB |
694 | |
695 | /* must not have any changes since most recent snapshot */ | |
13fe0198 MA |
696 | if (!drba->drba_cookie->drc_force && |
697 | dsl_dataset_modified_since_lastsnap(ds)) | |
34dc7c2f BB |
698 | return (ETXTBSY); |
699 | ||
13fe0198 MA |
700 | /* temporary clone name must not exist */ |
701 | error = zap_lookup(dp->dp_meta_objset, | |
702 | ds->ds_dir->dd_phys->dd_child_dir_zapobj, recv_clone_name, | |
703 | 8, 1, &val); | |
704 | if (error != ENOENT) | |
705 | return (error == 0 ? EBUSY : error); | |
706 | ||
572e2857 | 707 | /* new snapshot name must not exist */ |
13fe0198 MA |
708 | error = zap_lookup(dp->dp_meta_objset, |
709 | ds->ds_phys->ds_snapnames_zapobj, drba->drba_cookie->drc_tosnap, | |
710 | 8, 1, &val); | |
711 | if (error != ENOENT) | |
712 | return (error == 0 ? EEXIST : error); | |
572e2857 | 713 | |
13fe0198 | 714 | if (fromguid != 0) { |
428870ff BB |
715 | /* if incremental, most recent snapshot must match fromguid */ |
716 | if (ds->ds_prev == NULL) | |
717 | return (ENODEV); | |
34dc7c2f | 718 | |
428870ff BB |
719 | /* |
720 | * most recent snapshot must match fromguid, or there are no | |
721 | * changes since the fromguid one | |
722 | */ | |
13fe0198 | 723 | if (ds->ds_prev->ds_phys->ds_guid != fromguid) { |
428870ff BB |
724 | uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth; |
725 | uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj; | |
726 | while (obj != 0) { | |
727 | dsl_dataset_t *snap; | |
13fe0198 MA |
728 | error = dsl_dataset_hold_obj(dp, obj, FTAG, |
729 | &snap); | |
730 | if (error != 0) | |
428870ff BB |
731 | return (ENODEV); |
732 | if (snap->ds_phys->ds_creation_txg < birth) { | |
733 | dsl_dataset_rele(snap, FTAG); | |
734 | return (ENODEV); | |
735 | } | |
13fe0198 | 736 | if (snap->ds_phys->ds_guid == fromguid) { |
428870ff BB |
737 | dsl_dataset_rele(snap, FTAG); |
738 | break; /* it's ok */ | |
739 | } | |
740 | obj = snap->ds_phys->ds_prev_snap_obj; | |
741 | dsl_dataset_rele(snap, FTAG); | |
742 | } | |
743 | if (obj == 0) | |
744 | return (ENODEV); | |
745 | } | |
746 | } else { | |
747 | /* if full, most recent snapshot must be $ORIGIN */ | |
748 | if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL) | |
749 | return (ENODEV); | |
750 | } | |
34dc7c2f | 751 | |
34dc7c2f | 752 | return (0); |
13fe0198 MA |
753 | |
754 | } | |
755 | ||
756 | static int | |
757 | dmu_recv_begin_check(void *arg, dmu_tx_t *tx) | |
758 | { | |
759 | dmu_recv_begin_arg_t *drba = arg; | |
760 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
761 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
762 | uint64_t fromguid = drrb->drr_fromguid; | |
763 | int flags = drrb->drr_flags; | |
764 | int error; | |
765 | dsl_dataset_t *ds; | |
766 | const char *tofs = drba->drba_cookie->drc_tofs; | |
767 | ||
768 | /* already checked */ | |
769 | ASSERT3U(drrb->drr_magic, ==, DMU_BACKUP_MAGIC); | |
770 | ||
771 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
772 | DMU_COMPOUNDSTREAM || | |
773 | drrb->drr_type >= DMU_OST_NUMTYPES || | |
774 | ((flags & DRR_FLAG_CLONE) && drba->drba_origin == NULL)) | |
775 | return (EINVAL); | |
776 | ||
777 | /* Verify pool version supports SA if SA_SPILL feature set */ | |
778 | if ((DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) & | |
779 | DMU_BACKUP_FEATURE_SA_SPILL) && | |
780 | spa_version(dp->dp_spa) < SPA_VERSION_SA) { | |
781 | return (ENOTSUP); | |
782 | } | |
783 | ||
784 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); | |
785 | if (error == 0) { | |
786 | /* target fs already exists; recv into temp clone */ | |
787 | ||
788 | /* Can't recv a clone into an existing fs */ | |
789 | if (flags & DRR_FLAG_CLONE) { | |
790 | dsl_dataset_rele(ds, FTAG); | |
791 | return (EINVAL); | |
792 | } | |
793 | ||
794 | error = recv_begin_check_existing_impl(drba, ds, fromguid); | |
795 | dsl_dataset_rele(ds, FTAG); | |
796 | } else if (error == ENOENT) { | |
797 | /* target fs does not exist; must be a full backup or clone */ | |
798 | char buf[MAXNAMELEN]; | |
799 | ||
800 | /* | |
801 | * If it's a non-clone incremental, we are missing the | |
802 | * target fs, so fail the recv. | |
803 | */ | |
804 | if (fromguid != 0 && !(flags & DRR_FLAG_CLONE)) | |
805 | return (ENOENT); | |
806 | ||
807 | /* Open the parent of tofs */ | |
808 | ASSERT3U(strlen(tofs), <, MAXNAMELEN); | |
809 | (void) strlcpy(buf, tofs, strrchr(tofs, '/') - tofs + 1); | |
810 | error = dsl_dataset_hold(dp, buf, FTAG, &ds); | |
811 | if (error != 0) | |
812 | return (error); | |
813 | ||
814 | if (drba->drba_origin != NULL) { | |
815 | dsl_dataset_t *origin; | |
816 | error = dsl_dataset_hold(dp, drba->drba_origin, | |
817 | FTAG, &origin); | |
818 | if (error != 0) { | |
819 | dsl_dataset_rele(ds, FTAG); | |
820 | return (error); | |
821 | } | |
822 | if (!dsl_dataset_is_snapshot(origin)) { | |
823 | dsl_dataset_rele(origin, FTAG); | |
824 | dsl_dataset_rele(ds, FTAG); | |
825 | return (EINVAL); | |
826 | } | |
827 | if (origin->ds_phys->ds_guid != fromguid) { | |
828 | dsl_dataset_rele(origin, FTAG); | |
829 | dsl_dataset_rele(ds, FTAG); | |
830 | return (ENODEV); | |
831 | } | |
832 | dsl_dataset_rele(origin, FTAG); | |
833 | } | |
834 | dsl_dataset_rele(ds, FTAG); | |
835 | error = 0; | |
836 | } | |
837 | return (error); | |
34dc7c2f BB |
838 | } |
839 | ||
34dc7c2f | 840 | static void |
13fe0198 | 841 | dmu_recv_begin_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 842 | { |
13fe0198 MA |
843 | dmu_recv_begin_arg_t *drba = arg; |
844 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
845 | struct drr_begin *drrb = drba->drba_cookie->drc_drrb; | |
846 | const char *tofs = drba->drba_cookie->drc_tofs; | |
847 | dsl_dataset_t *ds, *newds; | |
34dc7c2f | 848 | uint64_t dsobj; |
13fe0198 MA |
849 | int error; |
850 | uint64_t crflags; | |
851 | ||
852 | crflags = (drrb->drr_flags & DRR_FLAG_CI_DATA) ? | |
853 | DS_FLAG_CI_DATASET : 0; | |
34dc7c2f | 854 | |
13fe0198 MA |
855 | error = dsl_dataset_hold(dp, tofs, FTAG, &ds); |
856 | if (error == 0) { | |
857 | /* create temporary clone */ | |
858 | dsobj = dsl_dataset_create_sync(ds->ds_dir, recv_clone_name, | |
859 | ds->ds_prev, crflags, drba->drba_cred, tx); | |
860 | dsl_dataset_rele(ds, FTAG); | |
861 | } else { | |
862 | dsl_dir_t *dd; | |
863 | const char *tail; | |
864 | dsl_dataset_t *origin = NULL; | |
865 | ||
866 | VERIFY0(dsl_dir_hold(dp, tofs, FTAG, &dd, &tail)); | |
867 | ||
868 | if (drba->drba_origin != NULL) { | |
869 | VERIFY0(dsl_dataset_hold(dp, drba->drba_origin, | |
870 | FTAG, &origin)); | |
871 | } | |
872 | ||
873 | /* Create new dataset. */ | |
874 | dsobj = dsl_dataset_create_sync(dd, | |
875 | strrchr(tofs, '/') + 1, | |
876 | origin, crflags, drba->drba_cred, tx); | |
877 | if (origin != NULL) | |
878 | dsl_dataset_rele(origin, FTAG); | |
879 | dsl_dir_rele(dd, FTAG); | |
880 | drba->drba_cookie->drc_newfs = B_TRUE; | |
881 | } | |
882 | VERIFY0(dsl_dataset_own_obj(dp, dsobj, dmu_recv_tag, &newds)); | |
883 | ||
884 | dmu_buf_will_dirty(newds->ds_dbuf, tx); | |
885 | newds->ds_phys->ds_flags |= DS_FLAG_INCONSISTENT; | |
34dc7c2f | 886 | |
428870ff BB |
887 | /* |
888 | * If we actually created a non-clone, we need to create the | |
889 | * objset in our new dataset. | |
890 | */ | |
13fe0198 | 891 | if (BP_IS_HOLE(dsl_dataset_get_blkptr(newds))) { |
428870ff | 892 | (void) dmu_objset_create_impl(dp->dp_spa, |
13fe0198 | 893 | newds, dsl_dataset_get_blkptr(newds), drrb->drr_type, tx); |
428870ff | 894 | } |
34dc7c2f | 895 | |
13fe0198 | 896 | drba->drba_cookie->drc_ds = newds; |
428870ff | 897 | |
13fe0198 | 898 | spa_history_log_internal_ds(newds, "receive", tx, ""); |
34dc7c2f BB |
899 | } |
900 | ||
34dc7c2f BB |
901 | /* |
902 | * NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin() | |
903 | * succeeds; otherwise we will leak the holds on the datasets. | |
904 | */ | |
905 | int | |
13fe0198 MA |
906 | dmu_recv_begin(char *tofs, char *tosnap, struct drr_begin *drrb, |
907 | boolean_t force, char *origin, dmu_recv_cookie_t *drc) | |
34dc7c2f | 908 | { |
13fe0198 MA |
909 | dmu_recv_begin_arg_t drba = { 0 }; |
910 | dmu_replay_record_t *drr; | |
34dc7c2f BB |
911 | |
912 | bzero(drc, sizeof (dmu_recv_cookie_t)); | |
913 | drc->drc_drrb = drrb; | |
914 | drc->drc_tosnap = tosnap; | |
13fe0198 | 915 | drc->drc_tofs = tofs; |
34dc7c2f BB |
916 | drc->drc_force = force; |
917 | ||
13fe0198 MA |
918 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) |
919 | drc->drc_byteswap = B_TRUE; | |
920 | else if (drrb->drr_magic != DMU_BACKUP_MAGIC) | |
921 | return (EINVAL); | |
34dc7c2f | 922 | |
13fe0198 MA |
923 | drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); |
924 | drr->drr_type = DRR_BEGIN; | |
925 | drr->drr_u.drr_begin = *drc->drc_drrb; | |
926 | if (drc->drc_byteswap) { | |
927 | fletcher_4_incremental_byteswap(drr, | |
928 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
929 | } else { | |
930 | fletcher_4_incremental_native(drr, | |
931 | sizeof (dmu_replay_record_t), &drc->drc_cksum); | |
932 | } | |
933 | kmem_free(drr, sizeof (dmu_replay_record_t)); | |
428870ff | 934 | |
13fe0198 MA |
935 | if (drc->drc_byteswap) { |
936 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
937 | drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); | |
938 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); | |
939 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
940 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
941 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
34dc7c2f BB |
942 | } |
943 | ||
13fe0198 MA |
944 | drba.drba_origin = origin; |
945 | drba.drba_cookie = drc; | |
946 | drba.drba_cred = CRED(); | |
947 | ||
948 | return (dsl_sync_task(tofs, dmu_recv_begin_check, dmu_recv_begin_sync, | |
949 | &drba, 5)); | |
34dc7c2f BB |
950 | } |
951 | ||
952 | struct restorearg { | |
953 | int err; | |
13fe0198 | 954 | boolean_t byteswap; |
34dc7c2f BB |
955 | vnode_t *vp; |
956 | char *buf; | |
957 | uint64_t voff; | |
958 | int bufsize; /* amount of memory allocated for buf */ | |
959 | zio_cksum_t cksum; | |
572e2857 | 960 | avl_tree_t *guid_to_ds_map; |
34dc7c2f BB |
961 | }; |
962 | ||
428870ff BB |
963 | typedef struct guid_map_entry { |
964 | uint64_t guid; | |
965 | dsl_dataset_t *gme_ds; | |
966 | avl_node_t avlnode; | |
967 | } guid_map_entry_t; | |
968 | ||
969 | static int | |
970 | guid_compare(const void *arg1, const void *arg2) | |
971 | { | |
972 | const guid_map_entry_t *gmep1 = arg1; | |
973 | const guid_map_entry_t *gmep2 = arg2; | |
974 | ||
975 | if (gmep1->guid < gmep2->guid) | |
976 | return (-1); | |
977 | else if (gmep1->guid > gmep2->guid) | |
978 | return (1); | |
979 | return (0); | |
980 | } | |
981 | ||
572e2857 BB |
982 | static void |
983 | free_guid_map_onexit(void *arg) | |
984 | { | |
985 | avl_tree_t *ca = arg; | |
986 | void *cookie = NULL; | |
987 | guid_map_entry_t *gmep; | |
988 | ||
989 | while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { | |
13fe0198 | 990 | dsl_dataset_long_rele(gmep->gme_ds, gmep); |
572e2857 BB |
991 | kmem_free(gmep, sizeof (guid_map_entry_t)); |
992 | } | |
993 | avl_destroy(ca); | |
994 | kmem_free(ca, sizeof (avl_tree_t)); | |
995 | } | |
996 | ||
34dc7c2f BB |
997 | static void * |
998 | restore_read(struct restorearg *ra, int len) | |
999 | { | |
1000 | void *rv; | |
1001 | int done = 0; | |
1002 | ||
1003 | /* some things will require 8-byte alignment, so everything must */ | |
c99c9001 | 1004 | ASSERT0(len % 8); |
34dc7c2f BB |
1005 | |
1006 | while (done < len) { | |
1007 | ssize_t resid; | |
1008 | ||
1009 | ra->err = vn_rdwr(UIO_READ, ra->vp, | |
1010 | (caddr_t)ra->buf + done, len - done, | |
1011 | ra->voff, UIO_SYSSPACE, FAPPEND, | |
1012 | RLIM64_INFINITY, CRED(), &resid); | |
1013 | ||
1014 | if (resid == len - done) | |
1015 | ra->err = EINVAL; | |
1016 | ra->voff += len - done - resid; | |
1017 | done = len - resid; | |
13fe0198 | 1018 | if (ra->err != 0) |
34dc7c2f BB |
1019 | return (NULL); |
1020 | } | |
1021 | ||
1022 | ASSERT3U(done, ==, len); | |
1023 | rv = ra->buf; | |
1024 | if (ra->byteswap) | |
1025 | fletcher_4_incremental_byteswap(rv, len, &ra->cksum); | |
1026 | else | |
1027 | fletcher_4_incremental_native(rv, len, &ra->cksum); | |
1028 | return (rv); | |
1029 | } | |
1030 | ||
60948de1 | 1031 | noinline static void |
34dc7c2f BB |
1032 | backup_byteswap(dmu_replay_record_t *drr) |
1033 | { | |
1034 | #define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X)) | |
1035 | #define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X)) | |
1036 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1037 | drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen); | |
1038 | switch (drr->drr_type) { | |
1039 | case DRR_BEGIN: | |
1040 | DO64(drr_begin.drr_magic); | |
428870ff | 1041 | DO64(drr_begin.drr_versioninfo); |
34dc7c2f BB |
1042 | DO64(drr_begin.drr_creation_time); |
1043 | DO32(drr_begin.drr_type); | |
1044 | DO32(drr_begin.drr_flags); | |
1045 | DO64(drr_begin.drr_toguid); | |
1046 | DO64(drr_begin.drr_fromguid); | |
1047 | break; | |
1048 | case DRR_OBJECT: | |
1049 | DO64(drr_object.drr_object); | |
1050 | /* DO64(drr_object.drr_allocation_txg); */ | |
1051 | DO32(drr_object.drr_type); | |
1052 | DO32(drr_object.drr_bonustype); | |
1053 | DO32(drr_object.drr_blksz); | |
1054 | DO32(drr_object.drr_bonuslen); | |
428870ff | 1055 | DO64(drr_object.drr_toguid); |
34dc7c2f BB |
1056 | break; |
1057 | case DRR_FREEOBJECTS: | |
1058 | DO64(drr_freeobjects.drr_firstobj); | |
1059 | DO64(drr_freeobjects.drr_numobjs); | |
428870ff | 1060 | DO64(drr_freeobjects.drr_toguid); |
34dc7c2f BB |
1061 | break; |
1062 | case DRR_WRITE: | |
1063 | DO64(drr_write.drr_object); | |
1064 | DO32(drr_write.drr_type); | |
1065 | DO64(drr_write.drr_offset); | |
1066 | DO64(drr_write.drr_length); | |
428870ff BB |
1067 | DO64(drr_write.drr_toguid); |
1068 | DO64(drr_write.drr_key.ddk_cksum.zc_word[0]); | |
1069 | DO64(drr_write.drr_key.ddk_cksum.zc_word[1]); | |
1070 | DO64(drr_write.drr_key.ddk_cksum.zc_word[2]); | |
1071 | DO64(drr_write.drr_key.ddk_cksum.zc_word[3]); | |
1072 | DO64(drr_write.drr_key.ddk_prop); | |
1073 | break; | |
1074 | case DRR_WRITE_BYREF: | |
1075 | DO64(drr_write_byref.drr_object); | |
1076 | DO64(drr_write_byref.drr_offset); | |
1077 | DO64(drr_write_byref.drr_length); | |
1078 | DO64(drr_write_byref.drr_toguid); | |
1079 | DO64(drr_write_byref.drr_refguid); | |
1080 | DO64(drr_write_byref.drr_refobject); | |
1081 | DO64(drr_write_byref.drr_refoffset); | |
1082 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]); | |
1083 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]); | |
1084 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]); | |
1085 | DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]); | |
1086 | DO64(drr_write_byref.drr_key.ddk_prop); | |
34dc7c2f BB |
1087 | break; |
1088 | case DRR_FREE: | |
1089 | DO64(drr_free.drr_object); | |
1090 | DO64(drr_free.drr_offset); | |
1091 | DO64(drr_free.drr_length); | |
428870ff BB |
1092 | DO64(drr_free.drr_toguid); |
1093 | break; | |
1094 | case DRR_SPILL: | |
1095 | DO64(drr_spill.drr_object); | |
1096 | DO64(drr_spill.drr_length); | |
1097 | DO64(drr_spill.drr_toguid); | |
34dc7c2f BB |
1098 | break; |
1099 | case DRR_END: | |
1100 | DO64(drr_end.drr_checksum.zc_word[0]); | |
1101 | DO64(drr_end.drr_checksum.zc_word[1]); | |
1102 | DO64(drr_end.drr_checksum.zc_word[2]); | |
1103 | DO64(drr_end.drr_checksum.zc_word[3]); | |
428870ff | 1104 | DO64(drr_end.drr_toguid); |
34dc7c2f | 1105 | break; |
e75c13c3 BB |
1106 | default: |
1107 | break; | |
34dc7c2f BB |
1108 | } |
1109 | #undef DO64 | |
1110 | #undef DO32 | |
1111 | } | |
1112 | ||
60948de1 | 1113 | noinline static int |
34dc7c2f BB |
1114 | restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro) |
1115 | { | |
1116 | int err; | |
1117 | dmu_tx_t *tx; | |
b128c09f | 1118 | void *data = NULL; |
34dc7c2f | 1119 | |
34dc7c2f | 1120 | if (drro->drr_type == DMU_OT_NONE || |
9ae529ec CS |
1121 | !DMU_OT_IS_VALID(drro->drr_type) || |
1122 | !DMU_OT_IS_VALID(drro->drr_bonustype) || | |
428870ff | 1123 | drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS || |
34dc7c2f BB |
1124 | drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS || |
1125 | P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) || | |
1126 | drro->drr_blksz < SPA_MINBLOCKSIZE || | |
1127 | drro->drr_blksz > SPA_MAXBLOCKSIZE || | |
1128 | drro->drr_bonuslen > DN_MAX_BONUSLEN) { | |
1129 | return (EINVAL); | |
1130 | } | |
1131 | ||
9babb374 BB |
1132 | err = dmu_object_info(os, drro->drr_object, NULL); |
1133 | ||
1134 | if (err != 0 && err != ENOENT) | |
1135 | return (EINVAL); | |
1136 | ||
b128c09f BB |
1137 | if (drro->drr_bonuslen) { |
1138 | data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8)); | |
13fe0198 | 1139 | if (ra->err != 0) |
b128c09f BB |
1140 | return (ra->err); |
1141 | } | |
1142 | ||
34dc7c2f BB |
1143 | if (err == ENOENT) { |
1144 | /* currently free, want to be allocated */ | |
9babb374 | 1145 | tx = dmu_tx_create(os); |
34dc7c2f | 1146 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); |
34dc7c2f | 1147 | err = dmu_tx_assign(tx, TXG_WAIT); |
13fe0198 | 1148 | if (err != 0) { |
34dc7c2f BB |
1149 | dmu_tx_abort(tx); |
1150 | return (err); | |
1151 | } | |
1152 | err = dmu_object_claim(os, drro->drr_object, | |
1153 | drro->drr_type, drro->drr_blksz, | |
1154 | drro->drr_bonustype, drro->drr_bonuslen, tx); | |
9babb374 | 1155 | dmu_tx_commit(tx); |
34dc7c2f BB |
1156 | } else { |
1157 | /* currently allocated, want to be allocated */ | |
34dc7c2f BB |
1158 | err = dmu_object_reclaim(os, drro->drr_object, |
1159 | drro->drr_type, drro->drr_blksz, | |
9babb374 | 1160 | drro->drr_bonustype, drro->drr_bonuslen); |
34dc7c2f | 1161 | } |
13fe0198 | 1162 | if (err != 0) { |
34dc7c2f | 1163 | return (EINVAL); |
428870ff | 1164 | } |
9babb374 BB |
1165 | |
1166 | tx = dmu_tx_create(os); | |
1167 | dmu_tx_hold_bonus(tx, drro->drr_object); | |
1168 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1169 | if (err != 0) { |
9babb374 BB |
1170 | dmu_tx_abort(tx); |
1171 | return (err); | |
34dc7c2f BB |
1172 | } |
1173 | ||
428870ff BB |
1174 | dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype, |
1175 | tx); | |
34dc7c2f BB |
1176 | dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx); |
1177 | ||
b128c09f | 1178 | if (data != NULL) { |
34dc7c2f | 1179 | dmu_buf_t *db; |
b128c09f | 1180 | |
34dc7c2f BB |
1181 | VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db)); |
1182 | dmu_buf_will_dirty(db, tx); | |
1183 | ||
1184 | ASSERT3U(db->db_size, >=, drro->drr_bonuslen); | |
34dc7c2f BB |
1185 | bcopy(data, db->db_data, drro->drr_bonuslen); |
1186 | if (ra->byteswap) { | |
9ae529ec CS |
1187 | dmu_object_byteswap_t byteswap = |
1188 | DMU_OT_BYTESWAP(drro->drr_bonustype); | |
1189 | dmu_ot_byteswap[byteswap].ob_func(db->db_data, | |
34dc7c2f BB |
1190 | drro->drr_bonuslen); |
1191 | } | |
1192 | dmu_buf_rele(db, FTAG); | |
1193 | } | |
1194 | dmu_tx_commit(tx); | |
1195 | return (0); | |
1196 | } | |
1197 | ||
1198 | /* ARGSUSED */ | |
60948de1 | 1199 | noinline static int |
34dc7c2f BB |
1200 | restore_freeobjects(struct restorearg *ra, objset_t *os, |
1201 | struct drr_freeobjects *drrfo) | |
1202 | { | |
1203 | uint64_t obj; | |
1204 | ||
1205 | if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj) | |
1206 | return (EINVAL); | |
1207 | ||
1208 | for (obj = drrfo->drr_firstobj; | |
1209 | obj < drrfo->drr_firstobj + drrfo->drr_numobjs; | |
1210 | (void) dmu_object_next(os, &obj, FALSE, 0)) { | |
34dc7c2f BB |
1211 | int err; |
1212 | ||
1213 | if (dmu_object_info(os, obj, NULL) != 0) | |
1214 | continue; | |
1215 | ||
b128c09f | 1216 | err = dmu_free_object(os, obj); |
13fe0198 | 1217 | if (err != 0) |
34dc7c2f | 1218 | return (err); |
34dc7c2f BB |
1219 | } |
1220 | return (0); | |
1221 | } | |
1222 | ||
60948de1 | 1223 | noinline static int |
34dc7c2f BB |
1224 | restore_write(struct restorearg *ra, objset_t *os, |
1225 | struct drr_write *drrw) | |
1226 | { | |
1227 | dmu_tx_t *tx; | |
1228 | void *data; | |
1229 | int err; | |
1230 | ||
1231 | if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset || | |
9ae529ec | 1232 | !DMU_OT_IS_VALID(drrw->drr_type)) |
34dc7c2f BB |
1233 | return (EINVAL); |
1234 | ||
1235 | data = restore_read(ra, drrw->drr_length); | |
1236 | if (data == NULL) | |
1237 | return (ra->err); | |
1238 | ||
1239 | if (dmu_object_info(os, drrw->drr_object, NULL) != 0) | |
1240 | return (EINVAL); | |
1241 | ||
1242 | tx = dmu_tx_create(os); | |
1243 | ||
1244 | dmu_tx_hold_write(tx, drrw->drr_object, | |
1245 | drrw->drr_offset, drrw->drr_length); | |
1246 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1247 | if (err != 0) { |
34dc7c2f BB |
1248 | dmu_tx_abort(tx); |
1249 | return (err); | |
1250 | } | |
9ae529ec CS |
1251 | if (ra->byteswap) { |
1252 | dmu_object_byteswap_t byteswap = | |
1253 | DMU_OT_BYTESWAP(drrw->drr_type); | |
1254 | dmu_ot_byteswap[byteswap].ob_func(data, drrw->drr_length); | |
1255 | } | |
34dc7c2f BB |
1256 | dmu_write(os, drrw->drr_object, |
1257 | drrw->drr_offset, drrw->drr_length, data, tx); | |
1258 | dmu_tx_commit(tx); | |
1259 | return (0); | |
1260 | } | |
1261 | ||
428870ff BB |
1262 | /* |
1263 | * Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed | |
1264 | * streams to refer to a copy of the data that is already on the | |
1265 | * system because it came in earlier in the stream. This function | |
1266 | * finds the earlier copy of the data, and uses that copy instead of | |
1267 | * data from the stream to fulfill this write. | |
1268 | */ | |
1269 | static int | |
1270 | restore_write_byref(struct restorearg *ra, objset_t *os, | |
1271 | struct drr_write_byref *drrwbr) | |
1272 | { | |
1273 | dmu_tx_t *tx; | |
1274 | int err; | |
1275 | guid_map_entry_t gmesrch; | |
1276 | guid_map_entry_t *gmep; | |
1277 | avl_index_t where; | |
1278 | objset_t *ref_os = NULL; | |
1279 | dmu_buf_t *dbp; | |
1280 | ||
1281 | if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset) | |
1282 | return (EINVAL); | |
1283 | ||
1284 | /* | |
1285 | * If the GUID of the referenced dataset is different from the | |
1286 | * GUID of the target dataset, find the referenced dataset. | |
1287 | */ | |
1288 | if (drrwbr->drr_toguid != drrwbr->drr_refguid) { | |
1289 | gmesrch.guid = drrwbr->drr_refguid; | |
572e2857 | 1290 | if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch, |
428870ff BB |
1291 | &where)) == NULL) { |
1292 | return (EINVAL); | |
1293 | } | |
1294 | if (dmu_objset_from_ds(gmep->gme_ds, &ref_os)) | |
1295 | return (EINVAL); | |
1296 | } else { | |
1297 | ref_os = os; | |
1298 | } | |
1299 | ||
c65aa5b2 BB |
1300 | err = dmu_buf_hold(ref_os, drrwbr->drr_refobject, |
1301 | drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH); | |
1302 | if (err) | |
428870ff BB |
1303 | return (err); |
1304 | ||
1305 | tx = dmu_tx_create(os); | |
1306 | ||
1307 | dmu_tx_hold_write(tx, drrwbr->drr_object, | |
1308 | drrwbr->drr_offset, drrwbr->drr_length); | |
1309 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1310 | if (err != 0) { |
428870ff BB |
1311 | dmu_tx_abort(tx); |
1312 | return (err); | |
1313 | } | |
1314 | dmu_write(os, drrwbr->drr_object, | |
1315 | drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx); | |
1316 | dmu_buf_rele(dbp, FTAG); | |
1317 | dmu_tx_commit(tx); | |
1318 | return (0); | |
1319 | } | |
1320 | ||
1321 | static int | |
1322 | restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs) | |
1323 | { | |
1324 | dmu_tx_t *tx; | |
1325 | void *data; | |
1326 | dmu_buf_t *db, *db_spill; | |
1327 | int err; | |
1328 | ||
1329 | if (drrs->drr_length < SPA_MINBLOCKSIZE || | |
1330 | drrs->drr_length > SPA_MAXBLOCKSIZE) | |
1331 | return (EINVAL); | |
1332 | ||
1333 | data = restore_read(ra, drrs->drr_length); | |
1334 | if (data == NULL) | |
1335 | return (ra->err); | |
1336 | ||
1337 | if (dmu_object_info(os, drrs->drr_object, NULL) != 0) | |
1338 | return (EINVAL); | |
1339 | ||
1340 | VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db)); | |
1341 | if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) { | |
1342 | dmu_buf_rele(db, FTAG); | |
1343 | return (err); | |
1344 | } | |
1345 | ||
1346 | tx = dmu_tx_create(os); | |
1347 | ||
1348 | dmu_tx_hold_spill(tx, db->db_object); | |
1349 | ||
1350 | err = dmu_tx_assign(tx, TXG_WAIT); | |
13fe0198 | 1351 | if (err != 0) { |
428870ff BB |
1352 | dmu_buf_rele(db, FTAG); |
1353 | dmu_buf_rele(db_spill, FTAG); | |
1354 | dmu_tx_abort(tx); | |
1355 | return (err); | |
1356 | } | |
1357 | dmu_buf_will_dirty(db_spill, tx); | |
1358 | ||
1359 | if (db_spill->db_size < drrs->drr_length) | |
1360 | VERIFY(0 == dbuf_spill_set_blksz(db_spill, | |
1361 | drrs->drr_length, tx)); | |
1362 | bcopy(data, db_spill->db_data, drrs->drr_length); | |
1363 | ||
1364 | dmu_buf_rele(db, FTAG); | |
1365 | dmu_buf_rele(db_spill, FTAG); | |
1366 | ||
1367 | dmu_tx_commit(tx); | |
1368 | return (0); | |
1369 | } | |
1370 | ||
34dc7c2f | 1371 | /* ARGSUSED */ |
60948de1 | 1372 | noinline static int |
34dc7c2f BB |
1373 | restore_free(struct restorearg *ra, objset_t *os, |
1374 | struct drr_free *drrf) | |
1375 | { | |
34dc7c2f BB |
1376 | int err; |
1377 | ||
1378 | if (drrf->drr_length != -1ULL && | |
1379 | drrf->drr_offset + drrf->drr_length < drrf->drr_offset) | |
1380 | return (EINVAL); | |
1381 | ||
1382 | if (dmu_object_info(os, drrf->drr_object, NULL) != 0) | |
1383 | return (EINVAL); | |
1384 | ||
b128c09f | 1385 | err = dmu_free_long_range(os, drrf->drr_object, |
34dc7c2f | 1386 | drrf->drr_offset, drrf->drr_length); |
34dc7c2f BB |
1387 | return (err); |
1388 | } | |
1389 | ||
13fe0198 MA |
1390 | /* used to destroy the drc_ds on error */ |
1391 | static void | |
1392 | dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc) | |
1393 | { | |
1394 | char name[MAXNAMELEN]; | |
1395 | dsl_dataset_name(drc->drc_ds, name); | |
1396 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1397 | (void) dsl_destroy_head(name); | |
1398 | } | |
1399 | ||
34dc7c2f BB |
1400 | /* |
1401 | * NB: callers *must* call dmu_recv_end() if this succeeds. | |
1402 | */ | |
1403 | int | |
572e2857 BB |
1404 | dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp, |
1405 | int cleanup_fd, uint64_t *action_handlep) | |
34dc7c2f BB |
1406 | { |
1407 | struct restorearg ra = { 0 }; | |
1408 | dmu_replay_record_t *drr; | |
1409 | objset_t *os; | |
1410 | zio_cksum_t pcksum; | |
428870ff | 1411 | int featureflags; |
34dc7c2f | 1412 | |
13fe0198 MA |
1413 | ra.byteswap = drc->drc_byteswap; |
1414 | ra.cksum = drc->drc_cksum; | |
34dc7c2f BB |
1415 | ra.vp = vp; |
1416 | ra.voff = *voffp; | |
1417 | ra.bufsize = 1<<20; | |
00b46022 | 1418 | ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP); |
34dc7c2f BB |
1419 | |
1420 | /* these were verified in dmu_recv_begin */ | |
13fe0198 | 1421 | ASSERT3U(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo), ==, |
428870ff | 1422 | DMU_SUBSTREAM); |
13fe0198 | 1423 | ASSERT3U(drc->drc_drrb->drr_type, <, DMU_OST_NUMTYPES); |
34dc7c2f BB |
1424 | |
1425 | /* | |
1426 | * Open the objset we are modifying. | |
1427 | */ | |
13fe0198 | 1428 | VERIFY0(dmu_objset_from_ds(drc->drc_ds, &os)); |
34dc7c2f | 1429 | |
13fe0198 | 1430 | ASSERT(drc->drc_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT); |
34dc7c2f | 1431 | |
428870ff BB |
1432 | featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo); |
1433 | ||
1434 | /* if this stream is dedup'ed, set up the avl tree for guid mapping */ | |
1435 | if (featureflags & DMU_BACKUP_FEATURE_DEDUP) { | |
572e2857 BB |
1436 | minor_t minor; |
1437 | ||
1438 | if (cleanup_fd == -1) { | |
1439 | ra.err = EBADF; | |
1440 | goto out; | |
1441 | } | |
1442 | ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor); | |
13fe0198 | 1443 | if (ra.err != 0) { |
572e2857 BB |
1444 | cleanup_fd = -1; |
1445 | goto out; | |
1446 | } | |
1447 | ||
1448 | if (*action_handlep == 0) { | |
1449 | ra.guid_to_ds_map = | |
1450 | kmem_alloc(sizeof (avl_tree_t), KM_SLEEP); | |
1451 | avl_create(ra.guid_to_ds_map, guid_compare, | |
1452 | sizeof (guid_map_entry_t), | |
1453 | offsetof(guid_map_entry_t, avlnode)); | |
572e2857 BB |
1454 | ra.err = zfs_onexit_add_cb(minor, |
1455 | free_guid_map_onexit, ra.guid_to_ds_map, | |
1456 | action_handlep); | |
13fe0198 | 1457 | if (ra.err != 0) |
572e2857 BB |
1458 | goto out; |
1459 | } else { | |
1460 | ra.err = zfs_onexit_cb_data(minor, *action_handlep, | |
1461 | (void **)&ra.guid_to_ds_map); | |
13fe0198 | 1462 | if (ra.err != 0) |
572e2857 BB |
1463 | goto out; |
1464 | } | |
8d35c149 AS |
1465 | |
1466 | drc->drc_guid_to_ds_map = ra.guid_to_ds_map; | |
428870ff BB |
1467 | } |
1468 | ||
34dc7c2f BB |
1469 | /* |
1470 | * Read records and process them. | |
1471 | */ | |
1472 | pcksum = ra.cksum; | |
1473 | while (ra.err == 0 && | |
1474 | NULL != (drr = restore_read(&ra, sizeof (*drr)))) { | |
1475 | if (issig(JUSTLOOKING) && issig(FORREAL)) { | |
1476 | ra.err = EINTR; | |
1477 | goto out; | |
1478 | } | |
1479 | ||
1480 | if (ra.byteswap) | |
1481 | backup_byteswap(drr); | |
1482 | ||
1483 | switch (drr->drr_type) { | |
1484 | case DRR_OBJECT: | |
1485 | { | |
1486 | /* | |
1487 | * We need to make a copy of the record header, | |
1488 | * because restore_{object,write} may need to | |
1489 | * restore_read(), which will invalidate drr. | |
1490 | */ | |
1491 | struct drr_object drro = drr->drr_u.drr_object; | |
1492 | ra.err = restore_object(&ra, os, &drro); | |
1493 | break; | |
1494 | } | |
1495 | case DRR_FREEOBJECTS: | |
1496 | { | |
1497 | struct drr_freeobjects drrfo = | |
1498 | drr->drr_u.drr_freeobjects; | |
1499 | ra.err = restore_freeobjects(&ra, os, &drrfo); | |
1500 | break; | |
1501 | } | |
1502 | case DRR_WRITE: | |
1503 | { | |
1504 | struct drr_write drrw = drr->drr_u.drr_write; | |
1505 | ra.err = restore_write(&ra, os, &drrw); | |
1506 | break; | |
1507 | } | |
428870ff BB |
1508 | case DRR_WRITE_BYREF: |
1509 | { | |
1510 | struct drr_write_byref drrwbr = | |
1511 | drr->drr_u.drr_write_byref; | |
1512 | ra.err = restore_write_byref(&ra, os, &drrwbr); | |
1513 | break; | |
1514 | } | |
34dc7c2f BB |
1515 | case DRR_FREE: |
1516 | { | |
1517 | struct drr_free drrf = drr->drr_u.drr_free; | |
1518 | ra.err = restore_free(&ra, os, &drrf); | |
1519 | break; | |
1520 | } | |
1521 | case DRR_END: | |
1522 | { | |
1523 | struct drr_end drre = drr->drr_u.drr_end; | |
1524 | /* | |
1525 | * We compare against the *previous* checksum | |
1526 | * value, because the stored checksum is of | |
1527 | * everything before the DRR_END record. | |
1528 | */ | |
1529 | if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum)) | |
1530 | ra.err = ECKSUM; | |
1531 | goto out; | |
1532 | } | |
428870ff BB |
1533 | case DRR_SPILL: |
1534 | { | |
1535 | struct drr_spill drrs = drr->drr_u.drr_spill; | |
1536 | ra.err = restore_spill(&ra, os, &drrs); | |
1537 | break; | |
1538 | } | |
34dc7c2f BB |
1539 | default: |
1540 | ra.err = EINVAL; | |
1541 | goto out; | |
1542 | } | |
1543 | pcksum = ra.cksum; | |
1544 | } | |
1545 | ASSERT(ra.err != 0); | |
1546 | ||
1547 | out: | |
572e2857 BB |
1548 | if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1)) |
1549 | zfs_onexit_fd_rele(cleanup_fd); | |
1550 | ||
34dc7c2f BB |
1551 | if (ra.err != 0) { |
1552 | /* | |
45d1cae3 BB |
1553 | * destroy what we created, so we don't leave it in the |
1554 | * inconsistent restoring state. | |
34dc7c2f | 1555 | */ |
13fe0198 | 1556 | dmu_recv_cleanup_ds(drc); |
34dc7c2f BB |
1557 | } |
1558 | ||
00b46022 | 1559 | vmem_free(ra.buf, ra.bufsize); |
34dc7c2f BB |
1560 | *voffp = ra.voff; |
1561 | return (ra.err); | |
1562 | } | |
1563 | ||
34dc7c2f | 1564 | static int |
13fe0198 | 1565 | dmu_recv_end_check(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1566 | { |
13fe0198 MA |
1567 | dmu_recv_cookie_t *drc = arg; |
1568 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1569 | int error; | |
1570 | ||
1571 | ASSERT3P(drc->drc_ds->ds_owner, ==, dmu_recv_tag); | |
1572 | ||
1573 | if (!drc->drc_newfs) { | |
1574 | dsl_dataset_t *origin_head; | |
1575 | ||
1576 | error = dsl_dataset_hold(dp, drc->drc_tofs, FTAG, &origin_head); | |
1577 | if (error != 0) | |
1578 | return (error); | |
1579 | error = dsl_dataset_clone_swap_check_impl(drc->drc_ds, | |
1580 | origin_head, drc->drc_force); | |
1581 | if (error != 0) { | |
1582 | dsl_dataset_rele(origin_head, FTAG); | |
1583 | return (error); | |
1584 | } | |
1585 | error = dsl_dataset_snapshot_check_impl(origin_head, | |
1586 | drc->drc_tosnap, tx); | |
1587 | dsl_dataset_rele(origin_head, FTAG); | |
1588 | if (error != 0) | |
1589 | return (error); | |
34dc7c2f | 1590 | |
13fe0198 MA |
1591 | error = dsl_destroy_head_check_impl(drc->drc_ds, 1); |
1592 | } else { | |
1593 | error = dsl_dataset_snapshot_check_impl(drc->drc_ds, | |
1594 | drc->drc_tosnap, tx); | |
1595 | } | |
1596 | return (error); | |
34dc7c2f BB |
1597 | } |
1598 | ||
1599 | static void | |
13fe0198 | 1600 | dmu_recv_end_sync(void *arg, dmu_tx_t *tx) |
34dc7c2f | 1601 | { |
13fe0198 MA |
1602 | dmu_recv_cookie_t *drc = arg; |
1603 | dsl_pool_t *dp = dmu_tx_pool(tx); | |
1604 | ||
1605 | spa_history_log_internal_ds(drc->drc_ds, "finish receiving", | |
1606 | tx, "snap=%s", drc->drc_tosnap); | |
1607 | ||
1608 | if (!drc->drc_newfs) { | |
1609 | dsl_dataset_t *origin_head; | |
1610 | ||
1611 | VERIFY0(dsl_dataset_hold(dp, drc->drc_tofs, FTAG, | |
1612 | &origin_head)); | |
1613 | dsl_dataset_clone_swap_sync_impl(drc->drc_ds, | |
1614 | origin_head, tx); | |
1615 | dsl_dataset_snapshot_sync_impl(origin_head, | |
1616 | drc->drc_tosnap, tx); | |
1617 | ||
1618 | /* set snapshot's creation time and guid */ | |
1619 | dmu_buf_will_dirty(origin_head->ds_prev->ds_dbuf, tx); | |
1620 | origin_head->ds_prev->ds_phys->ds_creation_time = | |
1621 | drc->drc_drrb->drr_creation_time; | |
1622 | origin_head->ds_prev->ds_phys->ds_guid = | |
1623 | drc->drc_drrb->drr_toguid; | |
1624 | origin_head->ds_prev->ds_phys->ds_flags &= | |
1625 | ~DS_FLAG_INCONSISTENT; | |
1626 | ||
1627 | dmu_buf_will_dirty(origin_head->ds_dbuf, tx); | |
1628 | origin_head->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1629 | ||
1630 | dsl_dataset_rele(origin_head, FTAG); | |
1631 | dsl_destroy_head_sync_impl(drc->drc_ds, tx); | |
1632 | } else { | |
1633 | dsl_dataset_t *ds = drc->drc_ds; | |
34dc7c2f | 1634 | |
13fe0198 | 1635 | dsl_dataset_snapshot_sync_impl(ds, drc->drc_tosnap, tx); |
34dc7c2f | 1636 | |
13fe0198 MA |
1637 | /* set snapshot's creation time and guid */ |
1638 | dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx); | |
1639 | ds->ds_prev->ds_phys->ds_creation_time = | |
1640 | drc->drc_drrb->drr_creation_time; | |
1641 | ds->ds_prev->ds_phys->ds_guid = drc->drc_drrb->drr_toguid; | |
1642 | ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
34dc7c2f | 1643 | |
13fe0198 MA |
1644 | dmu_buf_will_dirty(ds->ds_dbuf, tx); |
1645 | ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; | |
1646 | } | |
1647 | drc->drc_newsnapobj = drc->drc_ds->ds_phys->ds_prev_snap_obj; | |
1648 | /* | |
1649 | * Release the hold from dmu_recv_begin. This must be done before | |
1650 | * we return to open context, so that when we free the dataset's dnode, | |
1651 | * we can evict its bonus buffer. | |
1652 | */ | |
1653 | dsl_dataset_disown(drc->drc_ds, dmu_recv_tag); | |
1654 | drc->drc_ds = NULL; | |
34dc7c2f BB |
1655 | } |
1656 | ||
8d35c149 | 1657 | static int |
13fe0198 | 1658 | add_ds_to_guidmap(const char *name, avl_tree_t *guid_map, uint64_t snapobj) |
8d35c149 | 1659 | { |
13fe0198 | 1660 | dsl_pool_t *dp; |
8d35c149 AS |
1661 | dsl_dataset_t *snapds; |
1662 | guid_map_entry_t *gmep; | |
1663 | int err; | |
1664 | ||
1665 | ASSERT(guid_map != NULL); | |
1666 | ||
13fe0198 MA |
1667 | err = dsl_pool_hold(name, FTAG, &dp); |
1668 | if (err != 0) | |
1669 | return (err); | |
1670 | err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snapds); | |
8d35c149 AS |
1671 | if (err == 0) { |
1672 | gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP); | |
1673 | gmep->guid = snapds->ds_phys->ds_guid; | |
1674 | gmep->gme_ds = snapds; | |
1675 | avl_add(guid_map, gmep); | |
13fe0198 MA |
1676 | dsl_dataset_long_hold(snapds, gmep); |
1677 | dsl_dataset_rele(snapds, FTAG); | |
8d35c149 AS |
1678 | } |
1679 | ||
13fe0198 | 1680 | dsl_pool_rele(dp, FTAG); |
8d35c149 AS |
1681 | return (err); |
1682 | } | |
1683 | ||
13fe0198 MA |
1684 | static int dmu_recv_end_modified_blocks = 3; |
1685 | ||
428870ff BB |
1686 | static int |
1687 | dmu_recv_existing_end(dmu_recv_cookie_t *drc) | |
34dc7c2f | 1688 | { |
13fe0198 | 1689 | int error; |
34dc7c2f | 1690 | |
13fe0198 MA |
1691 | #ifdef _KERNEL |
1692 | char *name; | |
34dc7c2f | 1693 | |
13fe0198 MA |
1694 | /* |
1695 | * We will be destroying the ds; make sure its origin is unmounted if | |
1696 | * necessary. | |
1697 | */ | |
1698 | name = kmem_alloc(MAXNAMELEN, KM_SLEEP); | |
1699 | dsl_dataset_name(drc->drc_ds, name); | |
1700 | zfs_destroy_unmount_origin(name); | |
1701 | kmem_free(name, MAXNAMELEN); | |
1702 | #endif | |
34dc7c2f | 1703 | |
13fe0198 MA |
1704 | error = dsl_sync_task(drc->drc_tofs, |
1705 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
1706 | dmu_recv_end_modified_blocks); | |
1707 | ||
1708 | if (error != 0) | |
1709 | dmu_recv_cleanup_ds(drc); | |
1710 | return (error); | |
34dc7c2f | 1711 | } |
428870ff BB |
1712 | |
1713 | static int | |
1714 | dmu_recv_new_end(dmu_recv_cookie_t *drc) | |
1715 | { | |
13fe0198 | 1716 | int error; |
428870ff | 1717 | |
13fe0198 MA |
1718 | error = dsl_sync_task(drc->drc_tofs, |
1719 | dmu_recv_end_check, dmu_recv_end_sync, drc, | |
1720 | dmu_recv_end_modified_blocks); | |
428870ff | 1721 | |
13fe0198 MA |
1722 | if (error != 0) { |
1723 | dmu_recv_cleanup_ds(drc); | |
1724 | } else if (drc->drc_guid_to_ds_map != NULL) { | |
1725 | (void) add_ds_to_guidmap(drc->drc_tofs, | |
1726 | drc->drc_guid_to_ds_map, | |
1727 | drc->drc_newsnapobj); | |
428870ff | 1728 | } |
13fe0198 | 1729 | return (error); |
428870ff BB |
1730 | } |
1731 | ||
1732 | int | |
1733 | dmu_recv_end(dmu_recv_cookie_t *drc) | |
1734 | { | |
13fe0198 | 1735 | if (drc->drc_newfs) |
428870ff | 1736 | return (dmu_recv_new_end(drc)); |
13fe0198 MA |
1737 | else |
1738 | return (dmu_recv_existing_end(drc)); | |
428870ff | 1739 | } |