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