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