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