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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 | ||
22 | /* | |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
24 | */ |
25 | ||
34dc7c2f BB |
26 | #include <assert.h> |
27 | #include <ctype.h> | |
28 | #include <errno.h> | |
34dc7c2f BB |
29 | #include <libintl.h> |
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <strings.h> | |
33 | #include <unistd.h> | |
34 | #include <stddef.h> | |
35 | #include <fcntl.h> | |
36 | #include <sys/mount.h> | |
428870ff BB |
37 | #include <pthread.h> |
38 | #include <umem.h> | |
34dc7c2f BB |
39 | |
40 | #include <libzfs.h> | |
41 | ||
42 | #include "zfs_namecheck.h" | |
43 | #include "zfs_prop.h" | |
428870ff | 44 | #include "zfs_fletcher.h" |
34dc7c2f | 45 | #include "libzfs_impl.h" |
428870ff BB |
46 | #include <sha2.h> |
47 | #include <sys/zio_checksum.h> | |
48 | #include <sys/ddt.h> | |
34dc7c2f | 49 | |
428870ff BB |
50 | /* in libzfs_dataset.c */ |
51 | extern void zfs_setprop_error(libzfs_handle_t *, zfs_prop_t, int, char *); | |
34dc7c2f | 52 | |
b128c09f | 53 | static int zfs_receive_impl(libzfs_handle_t *, const char *, recvflags_t, |
572e2857 | 54 | int, const char *, nvlist_t *, avl_tree_t *, char **, int, uint64_t *); |
428870ff BB |
55 | |
56 | static const zio_cksum_t zero_cksum = { 0 }; | |
57 | ||
58 | typedef struct dedup_arg { | |
59 | int inputfd; | |
60 | int outputfd; | |
61 | libzfs_handle_t *dedup_hdl; | |
62 | } dedup_arg_t; | |
63 | ||
64 | typedef struct dataref { | |
65 | uint64_t ref_guid; | |
66 | uint64_t ref_object; | |
67 | uint64_t ref_offset; | |
68 | } dataref_t; | |
69 | ||
70 | typedef struct dedup_entry { | |
71 | struct dedup_entry *dde_next; | |
72 | zio_cksum_t dde_chksum; | |
73 | uint64_t dde_prop; | |
74 | dataref_t dde_ref; | |
75 | } dedup_entry_t; | |
76 | ||
77 | #define MAX_DDT_PHYSMEM_PERCENT 20 | |
78 | #define SMALLEST_POSSIBLE_MAX_DDT_MB 128 | |
79 | ||
80 | typedef struct dedup_table { | |
81 | dedup_entry_t **dedup_hash_array; | |
82 | umem_cache_t *ddecache; | |
83 | uint64_t max_ddt_size; /* max dedup table size in bytes */ | |
84 | uint64_t cur_ddt_size; /* current dedup table size in bytes */ | |
85 | uint64_t ddt_count; | |
86 | int numhashbits; | |
87 | boolean_t ddt_full; | |
88 | } dedup_table_t; | |
89 | ||
90 | static int | |
91 | high_order_bit(uint64_t n) | |
92 | { | |
93 | int count; | |
94 | ||
95 | for (count = 0; n != 0; count++) | |
96 | n >>= 1; | |
97 | return (count); | |
98 | } | |
99 | ||
100 | static size_t | |
101 | ssread(void *buf, size_t len, FILE *stream) | |
102 | { | |
103 | size_t outlen; | |
104 | ||
105 | if ((outlen = fread(buf, len, 1, stream)) == 0) | |
106 | return (0); | |
107 | ||
108 | return (outlen); | |
109 | } | |
110 | ||
111 | static void | |
112 | ddt_hash_append(libzfs_handle_t *hdl, dedup_table_t *ddt, dedup_entry_t **ddepp, | |
113 | zio_cksum_t *cs, uint64_t prop, dataref_t *dr) | |
114 | { | |
115 | dedup_entry_t *dde; | |
116 | ||
117 | if (ddt->cur_ddt_size >= ddt->max_ddt_size) { | |
118 | if (ddt->ddt_full == B_FALSE) { | |
119 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
120 | "Dedup table full. Deduplication will continue " | |
121 | "with existing table entries")); | |
122 | ddt->ddt_full = B_TRUE; | |
123 | } | |
124 | return; | |
125 | } | |
126 | ||
127 | if ((dde = umem_cache_alloc(ddt->ddecache, UMEM_DEFAULT)) | |
128 | != NULL) { | |
129 | assert(*ddepp == NULL); | |
130 | dde->dde_next = NULL; | |
131 | dde->dde_chksum = *cs; | |
132 | dde->dde_prop = prop; | |
133 | dde->dde_ref = *dr; | |
134 | *ddepp = dde; | |
135 | ddt->cur_ddt_size += sizeof (dedup_entry_t); | |
136 | ddt->ddt_count++; | |
137 | } | |
138 | } | |
139 | ||
140 | /* | |
141 | * Using the specified dedup table, do a lookup for an entry with | |
142 | * the checksum cs. If found, return the block's reference info | |
143 | * in *dr. Otherwise, insert a new entry in the dedup table, using | |
144 | * the reference information specified by *dr. | |
145 | * | |
146 | * return value: true - entry was found | |
147 | * false - entry was not found | |
148 | */ | |
149 | static boolean_t | |
150 | ddt_update(libzfs_handle_t *hdl, dedup_table_t *ddt, zio_cksum_t *cs, | |
151 | uint64_t prop, dataref_t *dr) | |
152 | { | |
153 | uint32_t hashcode; | |
154 | dedup_entry_t **ddepp; | |
155 | ||
156 | hashcode = BF64_GET(cs->zc_word[0], 0, ddt->numhashbits); | |
157 | ||
158 | for (ddepp = &(ddt->dedup_hash_array[hashcode]); *ddepp != NULL; | |
159 | ddepp = &((*ddepp)->dde_next)) { | |
160 | if (ZIO_CHECKSUM_EQUAL(((*ddepp)->dde_chksum), *cs) && | |
161 | (*ddepp)->dde_prop == prop) { | |
162 | *dr = (*ddepp)->dde_ref; | |
163 | return (B_TRUE); | |
164 | } | |
165 | } | |
166 | ddt_hash_append(hdl, ddt, ddepp, cs, prop, dr); | |
167 | return (B_FALSE); | |
168 | } | |
169 | ||
170 | static int | |
171 | cksum_and_write(const void *buf, uint64_t len, zio_cksum_t *zc, int outfd) | |
172 | { | |
173 | fletcher_4_incremental_native(buf, len, zc); | |
174 | return (write(outfd, buf, len)); | |
175 | } | |
176 | ||
177 | /* | |
178 | * This function is started in a separate thread when the dedup option | |
179 | * has been requested. The main send thread determines the list of | |
180 | * snapshots to be included in the send stream and makes the ioctl calls | |
181 | * for each one. But instead of having the ioctl send the output to the | |
182 | * the output fd specified by the caller of zfs_send()), the | |
183 | * ioctl is told to direct the output to a pipe, which is read by the | |
184 | * alternate thread running THIS function. This function does the | |
185 | * dedup'ing by: | |
186 | * 1. building a dedup table (the DDT) | |
187 | * 2. doing checksums on each data block and inserting a record in the DDT | |
188 | * 3. looking for matching checksums, and | |
189 | * 4. sending a DRR_WRITE_BYREF record instead of a write record whenever | |
190 | * a duplicate block is found. | |
191 | * The output of this function then goes to the output fd requested | |
192 | * by the caller of zfs_send(). | |
193 | */ | |
194 | static void * | |
195 | cksummer(void *arg) | |
196 | { | |
197 | dedup_arg_t *dda = arg; | |
198 | char *buf = malloc(1<<20); | |
199 | dmu_replay_record_t thedrr; | |
200 | dmu_replay_record_t *drr = &thedrr; | |
201 | struct drr_begin *drrb = &thedrr.drr_u.drr_begin; | |
202 | struct drr_end *drre = &thedrr.drr_u.drr_end; | |
203 | struct drr_object *drro = &thedrr.drr_u.drr_object; | |
204 | struct drr_write *drrw = &thedrr.drr_u.drr_write; | |
205 | struct drr_spill *drrs = &thedrr.drr_u.drr_spill; | |
206 | FILE *ofp; | |
207 | int outfd; | |
208 | dmu_replay_record_t wbr_drr = {0}; | |
209 | struct drr_write_byref *wbr_drrr = &wbr_drr.drr_u.drr_write_byref; | |
210 | dedup_table_t ddt; | |
211 | zio_cksum_t stream_cksum; | |
212 | uint64_t physmem = sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE); | |
213 | uint64_t numbuckets; | |
214 | ||
215 | ddt.max_ddt_size = | |
216 | MAX((physmem * MAX_DDT_PHYSMEM_PERCENT)/100, | |
217 | SMALLEST_POSSIBLE_MAX_DDT_MB<<20); | |
218 | ||
219 | numbuckets = ddt.max_ddt_size/(sizeof (dedup_entry_t)); | |
220 | ||
221 | /* | |
222 | * numbuckets must be a power of 2. Increase number to | |
223 | * a power of 2 if necessary. | |
224 | */ | |
225 | if (!ISP2(numbuckets)) | |
226 | numbuckets = 1 << high_order_bit(numbuckets); | |
227 | ||
228 | ddt.dedup_hash_array = calloc(numbuckets, sizeof (dedup_entry_t *)); | |
229 | ddt.ddecache = umem_cache_create("dde", sizeof (dedup_entry_t), 0, | |
230 | NULL, NULL, NULL, NULL, NULL, 0); | |
231 | ddt.cur_ddt_size = numbuckets * sizeof (dedup_entry_t *); | |
232 | ddt.numhashbits = high_order_bit(numbuckets) - 1; | |
233 | ddt.ddt_full = B_FALSE; | |
234 | ||
235 | /* Initialize the write-by-reference block. */ | |
236 | wbr_drr.drr_type = DRR_WRITE_BYREF; | |
237 | wbr_drr.drr_payloadlen = 0; | |
238 | ||
239 | outfd = dda->outputfd; | |
240 | ofp = fdopen(dda->inputfd, "r"); | |
241 | while (ssread(drr, sizeof (dmu_replay_record_t), ofp) != 0) { | |
242 | ||
243 | switch (drr->drr_type) { | |
244 | case DRR_BEGIN: | |
245 | { | |
246 | int fflags; | |
247 | ZIO_SET_CHECKSUM(&stream_cksum, 0, 0, 0, 0); | |
248 | ||
249 | /* set the DEDUP feature flag for this stream */ | |
250 | fflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); | |
251 | fflags |= (DMU_BACKUP_FEATURE_DEDUP | | |
252 | DMU_BACKUP_FEATURE_DEDUPPROPS); | |
253 | DMU_SET_FEATUREFLAGS(drrb->drr_versioninfo, fflags); | |
254 | ||
255 | if (cksum_and_write(drr, sizeof (dmu_replay_record_t), | |
256 | &stream_cksum, outfd) == -1) | |
257 | goto out; | |
258 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
259 | DMU_COMPOUNDSTREAM && drr->drr_payloadlen != 0) { | |
260 | int sz = drr->drr_payloadlen; | |
261 | ||
262 | if (sz > 1<<20) { | |
263 | free(buf); | |
264 | buf = malloc(sz); | |
265 | } | |
266 | (void) ssread(buf, sz, ofp); | |
267 | if (ferror(stdin)) | |
268 | perror("fread"); | |
269 | if (cksum_and_write(buf, sz, &stream_cksum, | |
270 | outfd) == -1) | |
271 | goto out; | |
272 | } | |
273 | break; | |
274 | } | |
275 | ||
276 | case DRR_END: | |
277 | { | |
278 | /* use the recalculated checksum */ | |
279 | ZIO_SET_CHECKSUM(&drre->drr_checksum, | |
280 | stream_cksum.zc_word[0], stream_cksum.zc_word[1], | |
281 | stream_cksum.zc_word[2], stream_cksum.zc_word[3]); | |
282 | if ((write(outfd, drr, | |
283 | sizeof (dmu_replay_record_t))) == -1) | |
284 | goto out; | |
285 | break; | |
286 | } | |
287 | ||
288 | case DRR_OBJECT: | |
289 | { | |
290 | if (cksum_and_write(drr, sizeof (dmu_replay_record_t), | |
291 | &stream_cksum, outfd) == -1) | |
292 | goto out; | |
293 | if (drro->drr_bonuslen > 0) { | |
294 | (void) ssread(buf, | |
295 | P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8), | |
296 | ofp); | |
297 | if (cksum_and_write(buf, | |
298 | P2ROUNDUP((uint64_t)drro->drr_bonuslen, 8), | |
299 | &stream_cksum, outfd) == -1) | |
300 | goto out; | |
301 | } | |
302 | break; | |
303 | } | |
304 | ||
305 | case DRR_SPILL: | |
306 | { | |
307 | if (cksum_and_write(drr, sizeof (dmu_replay_record_t), | |
308 | &stream_cksum, outfd) == -1) | |
309 | goto out; | |
310 | (void) ssread(buf, drrs->drr_length, ofp); | |
311 | if (cksum_and_write(buf, drrs->drr_length, | |
312 | &stream_cksum, outfd) == -1) | |
313 | goto out; | |
314 | break; | |
315 | } | |
316 | ||
317 | case DRR_FREEOBJECTS: | |
318 | { | |
319 | if (cksum_and_write(drr, sizeof (dmu_replay_record_t), | |
320 | &stream_cksum, outfd) == -1) | |
321 | goto out; | |
322 | break; | |
323 | } | |
324 | ||
325 | case DRR_WRITE: | |
326 | { | |
327 | dataref_t dataref; | |
328 | ||
329 | (void) ssread(buf, drrw->drr_length, ofp); | |
330 | ||
331 | /* | |
332 | * Use the existing checksum if it's dedup-capable, | |
333 | * else calculate a SHA256 checksum for it. | |
334 | */ | |
335 | ||
336 | if (ZIO_CHECKSUM_EQUAL(drrw->drr_key.ddk_cksum, | |
337 | zero_cksum) || | |
338 | !DRR_IS_DEDUP_CAPABLE(drrw->drr_checksumflags)) { | |
339 | SHA256_CTX ctx; | |
340 | zio_cksum_t tmpsha256; | |
341 | ||
342 | SHA256Init(&ctx); | |
343 | SHA256Update(&ctx, buf, drrw->drr_length); | |
344 | SHA256Final(&tmpsha256, &ctx); | |
345 | drrw->drr_key.ddk_cksum.zc_word[0] = | |
346 | BE_64(tmpsha256.zc_word[0]); | |
347 | drrw->drr_key.ddk_cksum.zc_word[1] = | |
348 | BE_64(tmpsha256.zc_word[1]); | |
349 | drrw->drr_key.ddk_cksum.zc_word[2] = | |
350 | BE_64(tmpsha256.zc_word[2]); | |
351 | drrw->drr_key.ddk_cksum.zc_word[3] = | |
352 | BE_64(tmpsha256.zc_word[3]); | |
353 | drrw->drr_checksumtype = ZIO_CHECKSUM_SHA256; | |
354 | drrw->drr_checksumflags = DRR_CHECKSUM_DEDUP; | |
355 | } | |
356 | ||
357 | dataref.ref_guid = drrw->drr_toguid; | |
358 | dataref.ref_object = drrw->drr_object; | |
359 | dataref.ref_offset = drrw->drr_offset; | |
360 | ||
361 | if (ddt_update(dda->dedup_hdl, &ddt, | |
362 | &drrw->drr_key.ddk_cksum, drrw->drr_key.ddk_prop, | |
363 | &dataref)) { | |
364 | /* block already present in stream */ | |
365 | wbr_drrr->drr_object = drrw->drr_object; | |
366 | wbr_drrr->drr_offset = drrw->drr_offset; | |
367 | wbr_drrr->drr_length = drrw->drr_length; | |
368 | wbr_drrr->drr_toguid = drrw->drr_toguid; | |
369 | wbr_drrr->drr_refguid = dataref.ref_guid; | |
370 | wbr_drrr->drr_refobject = | |
371 | dataref.ref_object; | |
372 | wbr_drrr->drr_refoffset = | |
373 | dataref.ref_offset; | |
374 | ||
375 | wbr_drrr->drr_checksumtype = | |
376 | drrw->drr_checksumtype; | |
377 | wbr_drrr->drr_checksumflags = | |
378 | drrw->drr_checksumtype; | |
379 | wbr_drrr->drr_key.ddk_cksum = | |
380 | drrw->drr_key.ddk_cksum; | |
381 | wbr_drrr->drr_key.ddk_prop = | |
382 | drrw->drr_key.ddk_prop; | |
383 | ||
384 | if (cksum_and_write(&wbr_drr, | |
385 | sizeof (dmu_replay_record_t), &stream_cksum, | |
386 | outfd) == -1) | |
387 | goto out; | |
388 | } else { | |
389 | /* block not previously seen */ | |
390 | if (cksum_and_write(drr, | |
391 | sizeof (dmu_replay_record_t), &stream_cksum, | |
392 | outfd) == -1) | |
393 | goto out; | |
394 | if (cksum_and_write(buf, | |
395 | drrw->drr_length, | |
396 | &stream_cksum, outfd) == -1) | |
397 | goto out; | |
398 | } | |
399 | break; | |
400 | } | |
401 | ||
402 | case DRR_FREE: | |
403 | { | |
404 | if (cksum_and_write(drr, sizeof (dmu_replay_record_t), | |
405 | &stream_cksum, outfd) == -1) | |
406 | goto out; | |
407 | break; | |
408 | } | |
409 | ||
410 | default: | |
411 | (void) printf("INVALID record type 0x%x\n", | |
412 | drr->drr_type); | |
413 | /* should never happen, so assert */ | |
414 | assert(B_FALSE); | |
415 | } | |
416 | } | |
417 | out: | |
418 | umem_cache_destroy(ddt.ddecache); | |
419 | free(ddt.dedup_hash_array); | |
420 | free(buf); | |
421 | (void) fclose(ofp); | |
422 | ||
423 | return (NULL); | |
424 | } | |
b128c09f | 425 | |
34dc7c2f BB |
426 | /* |
427 | * Routines for dealing with the AVL tree of fs-nvlists | |
428 | */ | |
429 | typedef struct fsavl_node { | |
430 | avl_node_t fn_node; | |
431 | nvlist_t *fn_nvfs; | |
432 | char *fn_snapname; | |
433 | uint64_t fn_guid; | |
434 | } fsavl_node_t; | |
435 | ||
436 | static int | |
437 | fsavl_compare(const void *arg1, const void *arg2) | |
438 | { | |
439 | const fsavl_node_t *fn1 = arg1; | |
440 | const fsavl_node_t *fn2 = arg2; | |
441 | ||
442 | if (fn1->fn_guid > fn2->fn_guid) | |
443 | return (+1); | |
444 | else if (fn1->fn_guid < fn2->fn_guid) | |
445 | return (-1); | |
446 | else | |
447 | return (0); | |
448 | } | |
449 | ||
450 | /* | |
451 | * Given the GUID of a snapshot, find its containing filesystem and | |
452 | * (optionally) name. | |
453 | */ | |
454 | static nvlist_t * | |
455 | fsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname) | |
456 | { | |
457 | fsavl_node_t fn_find; | |
458 | fsavl_node_t *fn; | |
459 | ||
460 | fn_find.fn_guid = snapguid; | |
461 | ||
462 | fn = avl_find(avl, &fn_find, NULL); | |
463 | if (fn) { | |
464 | if (snapname) | |
465 | *snapname = fn->fn_snapname; | |
466 | return (fn->fn_nvfs); | |
467 | } | |
468 | return (NULL); | |
469 | } | |
470 | ||
471 | static void | |
472 | fsavl_destroy(avl_tree_t *avl) | |
473 | { | |
474 | fsavl_node_t *fn; | |
475 | void *cookie; | |
476 | ||
477 | if (avl == NULL) | |
478 | return; | |
479 | ||
480 | cookie = NULL; | |
481 | while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL) | |
482 | free(fn); | |
483 | avl_destroy(avl); | |
484 | free(avl); | |
485 | } | |
486 | ||
45d1cae3 BB |
487 | /* |
488 | * Given an nvlist, produce an avl tree of snapshots, ordered by guid | |
489 | */ | |
34dc7c2f BB |
490 | static avl_tree_t * |
491 | fsavl_create(nvlist_t *fss) | |
492 | { | |
493 | avl_tree_t *fsavl; | |
494 | nvpair_t *fselem = NULL; | |
495 | ||
496 | if ((fsavl = malloc(sizeof (avl_tree_t))) == NULL) | |
497 | return (NULL); | |
498 | ||
499 | avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t), | |
500 | offsetof(fsavl_node_t, fn_node)); | |
501 | ||
502 | while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) { | |
503 | nvlist_t *nvfs, *snaps; | |
504 | nvpair_t *snapelem = NULL; | |
505 | ||
506 | VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); | |
507 | VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); | |
508 | ||
509 | while ((snapelem = | |
510 | nvlist_next_nvpair(snaps, snapelem)) != NULL) { | |
511 | fsavl_node_t *fn; | |
512 | uint64_t guid; | |
513 | ||
514 | VERIFY(0 == nvpair_value_uint64(snapelem, &guid)); | |
515 | if ((fn = malloc(sizeof (fsavl_node_t))) == NULL) { | |
516 | fsavl_destroy(fsavl); | |
517 | return (NULL); | |
518 | } | |
519 | fn->fn_nvfs = nvfs; | |
520 | fn->fn_snapname = nvpair_name(snapelem); | |
521 | fn->fn_guid = guid; | |
522 | ||
523 | /* | |
524 | * Note: if there are multiple snaps with the | |
525 | * same GUID, we ignore all but one. | |
526 | */ | |
527 | if (avl_find(fsavl, fn, NULL) == NULL) | |
528 | avl_add(fsavl, fn); | |
529 | else | |
530 | free(fn); | |
531 | } | |
532 | } | |
533 | ||
534 | return (fsavl); | |
535 | } | |
536 | ||
537 | /* | |
538 | * Routines for dealing with the giant nvlist of fs-nvlists, etc. | |
539 | */ | |
540 | typedef struct send_data { | |
541 | uint64_t parent_fromsnap_guid; | |
542 | nvlist_t *parent_snaps; | |
543 | nvlist_t *fss; | |
b128c09f | 544 | nvlist_t *snapprops; |
34dc7c2f BB |
545 | const char *fromsnap; |
546 | const char *tosnap; | |
428870ff | 547 | boolean_t recursive; |
34dc7c2f BB |
548 | |
549 | /* | |
550 | * The header nvlist is of the following format: | |
551 | * { | |
552 | * "tosnap" -> string | |
553 | * "fromsnap" -> string (if incremental) | |
554 | * "fss" -> { | |
555 | * id -> { | |
556 | * | |
557 | * "name" -> string (full name; for debugging) | |
558 | * "parentfromsnap" -> number (guid of fromsnap in parent) | |
559 | * | |
560 | * "props" -> { name -> value (only if set here) } | |
561 | * "snaps" -> { name (lastname) -> number (guid) } | |
b128c09f | 562 | * "snapprops" -> { name (lastname) -> { name -> value } } |
34dc7c2f BB |
563 | * |
564 | * "origin" -> number (guid) (if clone) | |
565 | * "sent" -> boolean (not on-disk) | |
566 | * } | |
567 | * } | |
568 | * } | |
569 | * | |
570 | */ | |
571 | } send_data_t; | |
572 | ||
b128c09f BB |
573 | static void send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv); |
574 | ||
34dc7c2f BB |
575 | static int |
576 | send_iterate_snap(zfs_handle_t *zhp, void *arg) | |
577 | { | |
578 | send_data_t *sd = arg; | |
579 | uint64_t guid = zhp->zfs_dmustats.dds_guid; | |
580 | char *snapname; | |
b128c09f | 581 | nvlist_t *nv; |
34dc7c2f BB |
582 | |
583 | snapname = strrchr(zhp->zfs_name, '@')+1; | |
584 | ||
585 | VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid)); | |
586 | /* | |
587 | * NB: if there is no fromsnap here (it's a newly created fs in | |
588 | * an incremental replication), we will substitute the tosnap. | |
589 | */ | |
590 | if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) || | |
591 | (sd->parent_fromsnap_guid == 0 && sd->tosnap && | |
592 | strcmp(snapname, sd->tosnap) == 0)) { | |
593 | sd->parent_fromsnap_guid = guid; | |
594 | } | |
595 | ||
b128c09f BB |
596 | VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); |
597 | send_iterate_prop(zhp, nv); | |
598 | VERIFY(0 == nvlist_add_nvlist(sd->snapprops, snapname, nv)); | |
599 | nvlist_free(nv); | |
600 | ||
34dc7c2f BB |
601 | zfs_close(zhp); |
602 | return (0); | |
603 | } | |
604 | ||
605 | static void | |
606 | send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv) | |
607 | { | |
608 | nvpair_t *elem = NULL; | |
609 | ||
610 | while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) { | |
611 | char *propname = nvpair_name(elem); | |
612 | zfs_prop_t prop = zfs_name_to_prop(propname); | |
613 | nvlist_t *propnv; | |
614 | ||
428870ff BB |
615 | if (!zfs_prop_user(propname)) { |
616 | /* | |
617 | * Realistically, this should never happen. However, | |
618 | * we want the ability to add DSL properties without | |
619 | * needing to make incompatible version changes. We | |
620 | * need to ignore unknown properties to allow older | |
621 | * software to still send datasets containing these | |
622 | * properties, with the unknown properties elided. | |
623 | */ | |
624 | if (prop == ZPROP_INVAL) | |
625 | continue; | |
9babb374 | 626 | |
428870ff BB |
627 | if (zfs_prop_readonly(prop)) |
628 | continue; | |
629 | } | |
34dc7c2f BB |
630 | |
631 | verify(nvpair_value_nvlist(elem, &propnv) == 0); | |
45d1cae3 BB |
632 | if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION || |
633 | prop == ZFS_PROP_REFQUOTA || | |
634 | prop == ZFS_PROP_REFRESERVATION) { | |
428870ff | 635 | char *source; |
34dc7c2f BB |
636 | uint64_t value; |
637 | verify(nvlist_lookup_uint64(propnv, | |
638 | ZPROP_VALUE, &value) == 0); | |
b128c09f BB |
639 | if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) |
640 | continue; | |
428870ff BB |
641 | /* |
642 | * May have no source before SPA_VERSION_RECVD_PROPS, | |
643 | * but is still modifiable. | |
644 | */ | |
645 | if (nvlist_lookup_string(propnv, | |
646 | ZPROP_SOURCE, &source) == 0) { | |
647 | if ((strcmp(source, zhp->zfs_name) != 0) && | |
648 | (strcmp(source, | |
649 | ZPROP_SOURCE_VAL_RECVD) != 0)) | |
650 | continue; | |
651 | } | |
34dc7c2f BB |
652 | } else { |
653 | char *source; | |
654 | if (nvlist_lookup_string(propnv, | |
655 | ZPROP_SOURCE, &source) != 0) | |
656 | continue; | |
428870ff BB |
657 | if ((strcmp(source, zhp->zfs_name) != 0) && |
658 | (strcmp(source, ZPROP_SOURCE_VAL_RECVD) != 0)) | |
34dc7c2f BB |
659 | continue; |
660 | } | |
661 | ||
662 | if (zfs_prop_user(propname) || | |
663 | zfs_prop_get_type(prop) == PROP_TYPE_STRING) { | |
664 | char *value; | |
665 | verify(nvlist_lookup_string(propnv, | |
666 | ZPROP_VALUE, &value) == 0); | |
667 | VERIFY(0 == nvlist_add_string(nv, propname, value)); | |
668 | } else { | |
669 | uint64_t value; | |
670 | verify(nvlist_lookup_uint64(propnv, | |
671 | ZPROP_VALUE, &value) == 0); | |
672 | VERIFY(0 == nvlist_add_uint64(nv, propname, value)); | |
673 | } | |
674 | } | |
675 | } | |
676 | ||
45d1cae3 BB |
677 | /* |
678 | * recursively generate nvlists describing datasets. See comment | |
679 | * for the data structure send_data_t above for description of contents | |
680 | * of the nvlist. | |
681 | */ | |
34dc7c2f BB |
682 | static int |
683 | send_iterate_fs(zfs_handle_t *zhp, void *arg) | |
684 | { | |
685 | send_data_t *sd = arg; | |
686 | nvlist_t *nvfs, *nv; | |
428870ff | 687 | int rv = 0; |
34dc7c2f BB |
688 | uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid; |
689 | uint64_t guid = zhp->zfs_dmustats.dds_guid; | |
690 | char guidstring[64]; | |
691 | ||
692 | VERIFY(0 == nvlist_alloc(&nvfs, NV_UNIQUE_NAME, 0)); | |
693 | VERIFY(0 == nvlist_add_string(nvfs, "name", zhp->zfs_name)); | |
694 | VERIFY(0 == nvlist_add_uint64(nvfs, "parentfromsnap", | |
695 | sd->parent_fromsnap_guid)); | |
696 | ||
697 | if (zhp->zfs_dmustats.dds_origin[0]) { | |
698 | zfs_handle_t *origin = zfs_open(zhp->zfs_hdl, | |
699 | zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT); | |
700 | if (origin == NULL) | |
701 | return (-1); | |
702 | VERIFY(0 == nvlist_add_uint64(nvfs, "origin", | |
703 | origin->zfs_dmustats.dds_guid)); | |
704 | } | |
705 | ||
706 | /* iterate over props */ | |
707 | VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); | |
708 | send_iterate_prop(zhp, nv); | |
709 | VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv)); | |
710 | nvlist_free(nv); | |
711 | ||
712 | /* iterate over snaps, and set sd->parent_fromsnap_guid */ | |
713 | sd->parent_fromsnap_guid = 0; | |
714 | VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0)); | |
b128c09f | 715 | VERIFY(0 == nvlist_alloc(&sd->snapprops, NV_UNIQUE_NAME, 0)); |
34dc7c2f BB |
716 | (void) zfs_iter_snapshots(zhp, send_iterate_snap, sd); |
717 | VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps)); | |
b128c09f | 718 | VERIFY(0 == nvlist_add_nvlist(nvfs, "snapprops", sd->snapprops)); |
34dc7c2f | 719 | nvlist_free(sd->parent_snaps); |
b128c09f | 720 | nvlist_free(sd->snapprops); |
34dc7c2f BB |
721 | |
722 | /* add this fs to nvlist */ | |
723 | (void) snprintf(guidstring, sizeof (guidstring), | |
724 | "0x%llx", (longlong_t)guid); | |
725 | VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs)); | |
726 | nvlist_free(nvfs); | |
727 | ||
728 | /* iterate over children */ | |
428870ff BB |
729 | if (sd->recursive) |
730 | rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd); | |
34dc7c2f BB |
731 | |
732 | sd->parent_fromsnap_guid = parent_fromsnap_guid_save; | |
733 | ||
734 | zfs_close(zhp); | |
735 | return (rv); | |
736 | } | |
737 | ||
738 | static int | |
739 | gather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap, | |
428870ff | 740 | const char *tosnap, boolean_t recursive, nvlist_t **nvlp, avl_tree_t **avlp) |
34dc7c2f BB |
741 | { |
742 | zfs_handle_t *zhp; | |
743 | send_data_t sd = { 0 }; | |
744 | int error; | |
745 | ||
746 | zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); | |
747 | if (zhp == NULL) | |
748 | return (EZFS_BADTYPE); | |
749 | ||
750 | VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0)); | |
751 | sd.fromsnap = fromsnap; | |
752 | sd.tosnap = tosnap; | |
428870ff | 753 | sd.recursive = recursive; |
34dc7c2f BB |
754 | |
755 | if ((error = send_iterate_fs(zhp, &sd)) != 0) { | |
756 | nvlist_free(sd.fss); | |
757 | if (avlp != NULL) | |
758 | *avlp = NULL; | |
759 | *nvlp = NULL; | |
760 | return (error); | |
761 | } | |
762 | ||
763 | if (avlp != NULL && (*avlp = fsavl_create(sd.fss)) == NULL) { | |
764 | nvlist_free(sd.fss); | |
765 | *nvlp = NULL; | |
766 | return (EZFS_NOMEM); | |
767 | } | |
768 | ||
769 | *nvlp = sd.fss; | |
770 | return (0); | |
771 | } | |
772 | ||
773 | /* | |
774 | * Routines for dealing with the sorted snapshot functionality | |
775 | */ | |
776 | typedef struct zfs_node { | |
777 | zfs_handle_t *zn_handle; | |
778 | avl_node_t zn_avlnode; | |
779 | } zfs_node_t; | |
780 | ||
781 | static int | |
782 | zfs_sort_snaps(zfs_handle_t *zhp, void *data) | |
783 | { | |
784 | avl_tree_t *avl = data; | |
572e2857 BB |
785 | zfs_node_t *node; |
786 | zfs_node_t search; | |
787 | ||
788 | search.zn_handle = zhp; | |
789 | node = avl_find(avl, &search, NULL); | |
790 | if (node) { | |
791 | /* | |
792 | * If this snapshot was renamed while we were creating the | |
793 | * AVL tree, it's possible that we already inserted it under | |
794 | * its old name. Remove the old handle before adding the new | |
795 | * one. | |
796 | */ | |
797 | zfs_close(node->zn_handle); | |
798 | avl_remove(avl, node); | |
799 | free(node); | |
800 | } | |
34dc7c2f | 801 | |
572e2857 | 802 | node = zfs_alloc(zhp->zfs_hdl, sizeof (zfs_node_t)); |
34dc7c2f BB |
803 | node->zn_handle = zhp; |
804 | avl_add(avl, node); | |
572e2857 | 805 | |
34dc7c2f BB |
806 | return (0); |
807 | } | |
808 | ||
34dc7c2f BB |
809 | static int |
810 | zfs_snapshot_compare(const void *larg, const void *rarg) | |
811 | { | |
812 | zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle; | |
813 | zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle; | |
814 | uint64_t lcreate, rcreate; | |
815 | ||
816 | /* | |
817 | * Sort them according to creation time. We use the hidden | |
818 | * CREATETXG property to get an absolute ordering of snapshots. | |
819 | */ | |
820 | lcreate = zfs_prop_get_int(l, ZFS_PROP_CREATETXG); | |
821 | rcreate = zfs_prop_get_int(r, ZFS_PROP_CREATETXG); | |
822 | ||
823 | if (lcreate < rcreate) | |
824 | return (-1); | |
825 | else if (lcreate > rcreate) | |
826 | return (+1); | |
827 | else | |
828 | return (0); | |
829 | } | |
830 | ||
428870ff | 831 | int |
34dc7c2f BB |
832 | zfs_iter_snapshots_sorted(zfs_handle_t *zhp, zfs_iter_f callback, void *data) |
833 | { | |
834 | int ret = 0; | |
835 | zfs_node_t *node; | |
836 | avl_tree_t avl; | |
837 | void *cookie = NULL; | |
838 | ||
839 | avl_create(&avl, zfs_snapshot_compare, | |
840 | sizeof (zfs_node_t), offsetof(zfs_node_t, zn_avlnode)); | |
841 | ||
842 | ret = zfs_iter_snapshots(zhp, zfs_sort_snaps, &avl); | |
843 | ||
844 | for (node = avl_first(&avl); node != NULL; node = AVL_NEXT(&avl, node)) | |
845 | ret |= callback(node->zn_handle, data); | |
846 | ||
847 | while ((node = avl_destroy_nodes(&avl, &cookie)) != NULL) | |
848 | free(node); | |
849 | ||
850 | avl_destroy(&avl); | |
851 | ||
852 | return (ret); | |
853 | } | |
854 | ||
855 | /* | |
856 | * Routines specific to "zfs send" | |
857 | */ | |
858 | typedef struct send_dump_data { | |
859 | /* these are all just the short snapname (the part after the @) */ | |
860 | const char *fromsnap; | |
861 | const char *tosnap; | |
428870ff | 862 | char prevsnap[ZFS_MAXNAMELEN]; |
572e2857 | 863 | uint64_t prevsnap_obj; |
34dc7c2f BB |
864 | boolean_t seenfrom, seento, replicate, doall, fromorigin; |
865 | boolean_t verbose; | |
866 | int outfd; | |
867 | boolean_t err; | |
868 | nvlist_t *fss; | |
869 | avl_tree_t *fsavl; | |
428870ff BB |
870 | snapfilter_cb_t *filter_cb; |
871 | void *filter_cb_arg; | |
872 | nvlist_t *debugnv; | |
572e2857 BB |
873 | char holdtag[ZFS_MAXNAMELEN]; |
874 | int cleanup_fd; | |
34dc7c2f BB |
875 | } send_dump_data_t; |
876 | ||
877 | /* | |
878 | * Dumps a backup of the given snapshot (incremental from fromsnap if it's not | |
879 | * NULL) to the file descriptor specified by outfd. | |
880 | */ | |
881 | static int | |
572e2857 BB |
882 | dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, uint64_t fromsnap_obj, |
883 | boolean_t fromorigin, int outfd, nvlist_t *debugnv) | |
34dc7c2f BB |
884 | { |
885 | zfs_cmd_t zc = { 0 }; | |
886 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
428870ff | 887 | nvlist_t *thisdbg; |
34dc7c2f BB |
888 | |
889 | assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); | |
572e2857 | 890 | assert(fromsnap_obj == 0 || !fromorigin); |
34dc7c2f BB |
891 | |
892 | (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); | |
34dc7c2f BB |
893 | zc.zc_cookie = outfd; |
894 | zc.zc_obj = fromorigin; | |
572e2857 BB |
895 | zc.zc_sendobj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID); |
896 | zc.zc_fromobj = fromsnap_obj; | |
428870ff BB |
897 | |
898 | VERIFY(0 == nvlist_alloc(&thisdbg, NV_UNIQUE_NAME, 0)); | |
899 | if (fromsnap && fromsnap[0] != '\0') { | |
900 | VERIFY(0 == nvlist_add_string(thisdbg, | |
901 | "fromsnap", fromsnap)); | |
902 | } | |
903 | ||
34dc7c2f BB |
904 | if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SEND, &zc) != 0) { |
905 | char errbuf[1024]; | |
906 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
907 | "warning: cannot send '%s'"), zhp->zfs_name); | |
908 | ||
428870ff BB |
909 | VERIFY(0 == nvlist_add_uint64(thisdbg, "error", errno)); |
910 | if (debugnv) { | |
911 | VERIFY(0 == nvlist_add_nvlist(debugnv, | |
912 | zhp->zfs_name, thisdbg)); | |
913 | } | |
914 | nvlist_free(thisdbg); | |
915 | ||
34dc7c2f BB |
916 | switch (errno) { |
917 | ||
918 | case EXDEV: | |
919 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
920 | "not an earlier snapshot from the same fs")); | |
921 | return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); | |
922 | ||
923 | case ENOENT: | |
924 | if (zfs_dataset_exists(hdl, zc.zc_name, | |
925 | ZFS_TYPE_SNAPSHOT)) { | |
926 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
927 | "incremental source (@%s) does not exist"), | |
928 | zc.zc_value); | |
929 | } | |
930 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
931 | ||
932 | case EDQUOT: | |
933 | case EFBIG: | |
934 | case EIO: | |
935 | case ENOLINK: | |
936 | case ENOSPC: | |
937 | case ENOSTR: | |
938 | case ENXIO: | |
939 | case EPIPE: | |
940 | case ERANGE: | |
941 | case EFAULT: | |
942 | case EROFS: | |
943 | zfs_error_aux(hdl, strerror(errno)); | |
944 | return (zfs_error(hdl, EZFS_BADBACKUP, errbuf)); | |
945 | ||
946 | default: | |
947 | return (zfs_standard_error(hdl, errno, errbuf)); | |
948 | } | |
949 | } | |
950 | ||
428870ff BB |
951 | if (debugnv) |
952 | VERIFY(0 == nvlist_add_nvlist(debugnv, zhp->zfs_name, thisdbg)); | |
953 | nvlist_free(thisdbg); | |
954 | ||
34dc7c2f BB |
955 | return (0); |
956 | } | |
957 | ||
572e2857 BB |
958 | static int |
959 | hold_for_send(zfs_handle_t *zhp, send_dump_data_t *sdd) | |
960 | { | |
961 | zfs_handle_t *pzhp; | |
962 | int error = 0; | |
963 | char *thissnap; | |
964 | ||
965 | assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); | |
966 | ||
967 | /* | |
968 | * zfs_send() only opens a cleanup_fd for sends that need it, | |
969 | * e.g. replication and doall. | |
970 | */ | |
971 | if (sdd->cleanup_fd == -1) | |
972 | return (0); | |
973 | ||
974 | thissnap = strchr(zhp->zfs_name, '@') + 1; | |
975 | *(thissnap - 1) = '\0'; | |
976 | pzhp = zfs_open(zhp->zfs_hdl, zhp->zfs_name, ZFS_TYPE_DATASET); | |
977 | *(thissnap - 1) = '@'; | |
978 | ||
979 | /* | |
980 | * It's OK if the parent no longer exists. The send code will | |
981 | * handle that error. | |
982 | */ | |
983 | if (pzhp) { | |
984 | error = zfs_hold(pzhp, thissnap, sdd->holdtag, | |
985 | B_FALSE, B_TRUE, B_TRUE, sdd->cleanup_fd, | |
986 | zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID), | |
987 | zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG)); | |
988 | zfs_close(pzhp); | |
989 | } | |
990 | ||
991 | return (error); | |
992 | } | |
993 | ||
34dc7c2f BB |
994 | static int |
995 | dump_snapshot(zfs_handle_t *zhp, void *arg) | |
996 | { | |
997 | send_dump_data_t *sdd = arg; | |
572e2857 | 998 | char *thissnap; |
34dc7c2f | 999 | int err; |
428870ff BB |
1000 | boolean_t isfromsnap, istosnap; |
1001 | boolean_t exclude = B_FALSE; | |
34dc7c2f BB |
1002 | |
1003 | thissnap = strchr(zhp->zfs_name, '@') + 1; | |
428870ff BB |
1004 | isfromsnap = (sdd->fromsnap != NULL && |
1005 | strcmp(sdd->fromsnap, thissnap) == 0); | |
34dc7c2f | 1006 | |
428870ff | 1007 | if (!sdd->seenfrom && isfromsnap) { |
572e2857 BB |
1008 | err = hold_for_send(zhp, sdd); |
1009 | if (err == 0) { | |
1010 | sdd->seenfrom = B_TRUE; | |
1011 | (void) strcpy(sdd->prevsnap, thissnap); | |
1012 | sdd->prevsnap_obj = zfs_prop_get_int(zhp, | |
1013 | ZFS_PROP_OBJSETID); | |
1014 | } else if (err == ENOENT) { | |
1015 | err = 0; | |
1016 | } | |
34dc7c2f | 1017 | zfs_close(zhp); |
572e2857 | 1018 | return (err); |
34dc7c2f BB |
1019 | } |
1020 | ||
1021 | if (sdd->seento || !sdd->seenfrom) { | |
1022 | zfs_close(zhp); | |
1023 | return (0); | |
1024 | } | |
1025 | ||
428870ff BB |
1026 | istosnap = (strcmp(sdd->tosnap, thissnap) == 0); |
1027 | if (istosnap) | |
1028 | sdd->seento = B_TRUE; | |
1029 | ||
1030 | if (!sdd->doall && !isfromsnap && !istosnap) { | |
1031 | if (sdd->replicate) { | |
1032 | char *snapname; | |
1033 | nvlist_t *snapprops; | |
1034 | /* | |
1035 | * Filter out all intermediate snapshots except origin | |
1036 | * snapshots needed to replicate clones. | |
1037 | */ | |
1038 | nvlist_t *nvfs = fsavl_find(sdd->fsavl, | |
1039 | zhp->zfs_dmustats.dds_guid, &snapname); | |
1040 | ||
1041 | VERIFY(0 == nvlist_lookup_nvlist(nvfs, | |
1042 | "snapprops", &snapprops)); | |
1043 | VERIFY(0 == nvlist_lookup_nvlist(snapprops, | |
1044 | thissnap, &snapprops)); | |
1045 | exclude = !nvlist_exists(snapprops, "is_clone_origin"); | |
1046 | } else { | |
1047 | exclude = B_TRUE; | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * If a filter function exists, call it to determine whether | |
1053 | * this snapshot will be sent. | |
1054 | */ | |
1055 | if (exclude || (sdd->filter_cb != NULL && | |
1056 | sdd->filter_cb(zhp, sdd->filter_cb_arg) == B_FALSE)) { | |
1057 | /* | |
1058 | * This snapshot is filtered out. Don't send it, and don't | |
572e2857 | 1059 | * set prevsnap_obj, so it will be as if this snapshot didn't |
428870ff BB |
1060 | * exist, and the next accepted snapshot will be sent as |
1061 | * an incremental from the last accepted one, or as the | |
1062 | * first (and full) snapshot in the case of a replication, | |
1063 | * non-incremental send. | |
1064 | */ | |
1065 | zfs_close(zhp); | |
1066 | return (0); | |
1067 | } | |
1068 | ||
572e2857 BB |
1069 | err = hold_for_send(zhp, sdd); |
1070 | if (err) { | |
1071 | if (err == ENOENT) | |
1072 | err = 0; | |
1073 | zfs_close(zhp); | |
1074 | return (err); | |
1075 | } | |
1076 | ||
34dc7c2f BB |
1077 | /* send it */ |
1078 | if (sdd->verbose) { | |
1079 | (void) fprintf(stderr, "sending from @%s to %s\n", | |
428870ff | 1080 | sdd->prevsnap, zhp->zfs_name); |
34dc7c2f BB |
1081 | } |
1082 | ||
572e2857 | 1083 | err = dump_ioctl(zhp, sdd->prevsnap, sdd->prevsnap_obj, |
428870ff | 1084 | sdd->prevsnap[0] == '\0' && (sdd->fromorigin || sdd->replicate), |
572e2857 | 1085 | sdd->outfd, sdd->debugnv); |
34dc7c2f | 1086 | |
572e2857 BB |
1087 | (void) strcpy(sdd->prevsnap, thissnap); |
1088 | sdd->prevsnap_obj = zfs_prop_get_int(zhp, ZFS_PROP_OBJSETID); | |
34dc7c2f BB |
1089 | zfs_close(zhp); |
1090 | return (err); | |
1091 | } | |
1092 | ||
1093 | static int | |
1094 | dump_filesystem(zfs_handle_t *zhp, void *arg) | |
1095 | { | |
1096 | int rv = 0; | |
1097 | send_dump_data_t *sdd = arg; | |
1098 | boolean_t missingfrom = B_FALSE; | |
1099 | zfs_cmd_t zc = { 0 }; | |
1100 | ||
1101 | (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", | |
1102 | zhp->zfs_name, sdd->tosnap); | |
1103 | if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) { | |
1104 | (void) fprintf(stderr, "WARNING: " | |
1105 | "could not send %s@%s: does not exist\n", | |
1106 | zhp->zfs_name, sdd->tosnap); | |
1107 | sdd->err = B_TRUE; | |
1108 | return (0); | |
1109 | } | |
1110 | ||
1111 | if (sdd->replicate && sdd->fromsnap) { | |
1112 | /* | |
1113 | * If this fs does not have fromsnap, and we're doing | |
1114 | * recursive, we need to send a full stream from the | |
1115 | * beginning (or an incremental from the origin if this | |
1116 | * is a clone). If we're doing non-recursive, then let | |
1117 | * them get the error. | |
1118 | */ | |
1119 | (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", | |
1120 | zhp->zfs_name, sdd->fromsnap); | |
1121 | if (ioctl(zhp->zfs_hdl->libzfs_fd, | |
1122 | ZFS_IOC_OBJSET_STATS, &zc) != 0) { | |
1123 | missingfrom = B_TRUE; | |
1124 | } | |
1125 | } | |
1126 | ||
428870ff | 1127 | sdd->seenfrom = sdd->seento = sdd->prevsnap[0] = 0; |
572e2857 | 1128 | sdd->prevsnap_obj = 0; |
428870ff BB |
1129 | if (sdd->fromsnap == NULL || missingfrom) |
1130 | sdd->seenfrom = B_TRUE; | |
34dc7c2f | 1131 | |
428870ff BB |
1132 | rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg); |
1133 | if (!sdd->seenfrom) { | |
1134 | (void) fprintf(stderr, | |
1135 | "WARNING: could not send %s@%s:\n" | |
1136 | "incremental source (%s@%s) does not exist\n", | |
1137 | zhp->zfs_name, sdd->tosnap, | |
1138 | zhp->zfs_name, sdd->fromsnap); | |
1139 | sdd->err = B_TRUE; | |
1140 | } else if (!sdd->seento) { | |
1141 | if (sdd->fromsnap) { | |
34dc7c2f BB |
1142 | (void) fprintf(stderr, |
1143 | "WARNING: could not send %s@%s:\n" | |
428870ff BB |
1144 | "incremental source (%s@%s) " |
1145 | "is not earlier than it\n", | |
34dc7c2f BB |
1146 | zhp->zfs_name, sdd->tosnap, |
1147 | zhp->zfs_name, sdd->fromsnap); | |
34dc7c2f | 1148 | } else { |
428870ff BB |
1149 | (void) fprintf(stderr, "WARNING: " |
1150 | "could not send %s@%s: does not exist\n", | |
1151 | zhp->zfs_name, sdd->tosnap); | |
34dc7c2f | 1152 | } |
428870ff | 1153 | sdd->err = B_TRUE; |
34dc7c2f BB |
1154 | } |
1155 | ||
1156 | return (rv); | |
1157 | } | |
1158 | ||
1159 | static int | |
1160 | dump_filesystems(zfs_handle_t *rzhp, void *arg) | |
1161 | { | |
1162 | send_dump_data_t *sdd = arg; | |
1163 | nvpair_t *fspair; | |
1164 | boolean_t needagain, progress; | |
1165 | ||
1166 | if (!sdd->replicate) | |
1167 | return (dump_filesystem(rzhp, sdd)); | |
1168 | ||
428870ff BB |
1169 | /* Mark the clone origin snapshots. */ |
1170 | for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; | |
1171 | fspair = nvlist_next_nvpair(sdd->fss, fspair)) { | |
1172 | nvlist_t *nvfs; | |
1173 | uint64_t origin_guid = 0; | |
1174 | ||
1175 | VERIFY(0 == nvpair_value_nvlist(fspair, &nvfs)); | |
1176 | (void) nvlist_lookup_uint64(nvfs, "origin", &origin_guid); | |
1177 | if (origin_guid != 0) { | |
1178 | char *snapname; | |
1179 | nvlist_t *origin_nv = fsavl_find(sdd->fsavl, | |
1180 | origin_guid, &snapname); | |
1181 | if (origin_nv != NULL) { | |
1182 | nvlist_t *snapprops; | |
1183 | VERIFY(0 == nvlist_lookup_nvlist(origin_nv, | |
1184 | "snapprops", &snapprops)); | |
1185 | VERIFY(0 == nvlist_lookup_nvlist(snapprops, | |
1186 | snapname, &snapprops)); | |
1187 | VERIFY(0 == nvlist_add_boolean( | |
1188 | snapprops, "is_clone_origin")); | |
1189 | } | |
1190 | } | |
1191 | } | |
34dc7c2f BB |
1192 | again: |
1193 | needagain = progress = B_FALSE; | |
1194 | for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; | |
1195 | fspair = nvlist_next_nvpair(sdd->fss, fspair)) { | |
1196 | nvlist_t *fslist; | |
1197 | char *fsname; | |
1198 | zfs_handle_t *zhp; | |
1199 | int err; | |
1200 | uint64_t origin_guid = 0; | |
34dc7c2f BB |
1201 | |
1202 | VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0); | |
1203 | if (nvlist_lookup_boolean(fslist, "sent") == 0) | |
1204 | continue; | |
1205 | ||
1206 | VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0); | |
1207 | (void) nvlist_lookup_uint64(fslist, "origin", &origin_guid); | |
1208 | ||
428870ff BB |
1209 | if (origin_guid != 0) { |
1210 | nvlist_t *origin_nv = fsavl_find(sdd->fsavl, | |
1211 | origin_guid, NULL); | |
1212 | if (origin_nv != NULL && | |
1213 | nvlist_lookup_boolean(origin_nv, | |
1214 | "sent") == ENOENT) { | |
1215 | /* | |
1216 | * origin has not been sent yet; | |
1217 | * skip this clone. | |
1218 | */ | |
1219 | needagain = B_TRUE; | |
1220 | continue; | |
1221 | } | |
34dc7c2f BB |
1222 | } |
1223 | ||
1224 | zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET); | |
1225 | if (zhp == NULL) | |
1226 | return (-1); | |
1227 | err = dump_filesystem(zhp, sdd); | |
1228 | VERIFY(nvlist_add_boolean(fslist, "sent") == 0); | |
1229 | progress = B_TRUE; | |
1230 | zfs_close(zhp); | |
1231 | if (err) | |
1232 | return (err); | |
1233 | } | |
1234 | if (needagain) { | |
1235 | assert(progress); | |
1236 | goto again; | |
1237 | } | |
1238 | return (0); | |
1239 | } | |
1240 | ||
1241 | /* | |
45d1cae3 BB |
1242 | * Generate a send stream for the dataset identified by the argument zhp. |
1243 | * | |
1244 | * The content of the send stream is the snapshot identified by | |
1245 | * 'tosnap'. Incremental streams are requested in two ways: | |
1246 | * - from the snapshot identified by "fromsnap" (if non-null) or | |
1247 | * - from the origin of the dataset identified by zhp, which must | |
1248 | * be a clone. In this case, "fromsnap" is null and "fromorigin" | |
1249 | * is TRUE. | |
1250 | * | |
1251 | * The send stream is recursive (i.e. dumps a hierarchy of snapshots) and | |
428870ff | 1252 | * uses a special header (with a hdrtype field of DMU_COMPOUNDSTREAM) |
45d1cae3 | 1253 | * if "replicate" is set. If "doall" is set, dump all the intermediate |
428870ff BB |
1254 | * snapshots. The DMU_COMPOUNDSTREAM header is used in the "doall" |
1255 | * case too. If "props" is set, send properties. | |
34dc7c2f BB |
1256 | */ |
1257 | int | |
1258 | zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap, | |
428870ff BB |
1259 | sendflags_t flags, int outfd, snapfilter_cb_t filter_func, |
1260 | void *cb_arg, nvlist_t **debugnvp) | |
34dc7c2f BB |
1261 | { |
1262 | char errbuf[1024]; | |
1263 | send_dump_data_t sdd = { 0 }; | |
1264 | int err; | |
1265 | nvlist_t *fss = NULL; | |
1266 | avl_tree_t *fsavl = NULL; | |
428870ff BB |
1267 | static uint64_t holdseq; |
1268 | int spa_version; | |
1269 | boolean_t holdsnaps = B_FALSE; | |
1270 | pthread_t tid; | |
1271 | int pipefd[2]; | |
1272 | dedup_arg_t dda = { 0 }; | |
1273 | int featureflags = 0; | |
1274 | ||
34dc7c2f BB |
1275 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, |
1276 | "cannot send '%s'"), zhp->zfs_name); | |
1277 | ||
1278 | if (fromsnap && fromsnap[0] == '\0') { | |
1279 | zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, | |
1280 | "zero-length incremental source")); | |
1281 | return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); | |
1282 | } | |
1283 | ||
572e2857 BB |
1284 | if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM) { |
1285 | uint64_t version; | |
1286 | version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); | |
1287 | if (version >= ZPL_VERSION_SA) { | |
1288 | featureflags |= DMU_BACKUP_FEATURE_SA_SPILL; | |
1289 | } | |
1290 | } | |
1291 | ||
428870ff | 1292 | if (zfs_spa_version(zhp, &spa_version) == 0 && |
572e2857 BB |
1293 | spa_version >= SPA_VERSION_USERREFS && |
1294 | (flags.doall || flags.replicate)) | |
428870ff BB |
1295 | holdsnaps = B_TRUE; |
1296 | ||
1297 | if (flags.dedup) { | |
1298 | featureflags |= (DMU_BACKUP_FEATURE_DEDUP | | |
1299 | DMU_BACKUP_FEATURE_DEDUPPROPS); | |
1300 | if (err = pipe(pipefd)) { | |
1301 | zfs_error_aux(zhp->zfs_hdl, strerror(errno)); | |
1302 | return (zfs_error(zhp->zfs_hdl, EZFS_PIPEFAILED, | |
1303 | errbuf)); | |
1304 | } | |
1305 | dda.outputfd = outfd; | |
1306 | dda.inputfd = pipefd[1]; | |
1307 | dda.dedup_hdl = zhp->zfs_hdl; | |
1308 | if (err = pthread_create(&tid, NULL, cksummer, &dda)) { | |
1309 | (void) close(pipefd[0]); | |
1310 | (void) close(pipefd[1]); | |
1311 | zfs_error_aux(zhp->zfs_hdl, strerror(errno)); | |
1312 | return (zfs_error(zhp->zfs_hdl, | |
1313 | EZFS_THREADCREATEFAILED, errbuf)); | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | if (flags.replicate || flags.doall || flags.props) { | |
34dc7c2f BB |
1318 | dmu_replay_record_t drr = { 0 }; |
1319 | char *packbuf = NULL; | |
1320 | size_t buflen = 0; | |
1321 | zio_cksum_t zc = { 0 }; | |
1322 | ||
428870ff | 1323 | if (flags.replicate || flags.props) { |
34dc7c2f BB |
1324 | nvlist_t *hdrnv; |
1325 | ||
1326 | VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0)); | |
1327 | if (fromsnap) { | |
1328 | VERIFY(0 == nvlist_add_string(hdrnv, | |
1329 | "fromsnap", fromsnap)); | |
1330 | } | |
1331 | VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap)); | |
428870ff BB |
1332 | if (!flags.replicate) { |
1333 | VERIFY(0 == nvlist_add_boolean(hdrnv, | |
1334 | "not_recursive")); | |
1335 | } | |
34dc7c2f BB |
1336 | |
1337 | err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name, | |
428870ff | 1338 | fromsnap, tosnap, flags.replicate, &fss, &fsavl); |
572e2857 | 1339 | if (err) |
428870ff | 1340 | goto err_out; |
34dc7c2f BB |
1341 | VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss)); |
1342 | err = nvlist_pack(hdrnv, &packbuf, &buflen, | |
1343 | NV_ENCODE_XDR, 0); | |
428870ff BB |
1344 | if (debugnvp) |
1345 | *debugnvp = hdrnv; | |
1346 | else | |
1347 | nvlist_free(hdrnv); | |
34dc7c2f BB |
1348 | if (err) { |
1349 | fsavl_destroy(fsavl); | |
1350 | nvlist_free(fss); | |
428870ff | 1351 | goto stderr_out; |
34dc7c2f BB |
1352 | } |
1353 | } | |
1354 | ||
1355 | /* write first begin record */ | |
1356 | drr.drr_type = DRR_BEGIN; | |
1357 | drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
428870ff BB |
1358 | DMU_SET_STREAM_HDRTYPE(drr.drr_u.drr_begin.drr_versioninfo, |
1359 | DMU_COMPOUNDSTREAM); | |
1360 | DMU_SET_FEATUREFLAGS(drr.drr_u.drr_begin.drr_versioninfo, | |
1361 | featureflags); | |
34dc7c2f BB |
1362 | (void) snprintf(drr.drr_u.drr_begin.drr_toname, |
1363 | sizeof (drr.drr_u.drr_begin.drr_toname), | |
1364 | "%s@%s", zhp->zfs_name, tosnap); | |
1365 | drr.drr_payloadlen = buflen; | |
428870ff | 1366 | err = cksum_and_write(&drr, sizeof (drr), &zc, outfd); |
34dc7c2f BB |
1367 | |
1368 | /* write header nvlist */ | |
428870ff BB |
1369 | if (err != -1 && packbuf != NULL) { |
1370 | err = cksum_and_write(packbuf, buflen, &zc, outfd); | |
34dc7c2f BB |
1371 | } |
1372 | free(packbuf); | |
1373 | if (err == -1) { | |
1374 | fsavl_destroy(fsavl); | |
1375 | nvlist_free(fss); | |
428870ff BB |
1376 | err = errno; |
1377 | goto stderr_out; | |
34dc7c2f BB |
1378 | } |
1379 | ||
1380 | /* write end record */ | |
1381 | if (err != -1) { | |
1382 | bzero(&drr, sizeof (drr)); | |
1383 | drr.drr_type = DRR_END; | |
1384 | drr.drr_u.drr_end.drr_checksum = zc; | |
1385 | err = write(outfd, &drr, sizeof (drr)); | |
1386 | if (err == -1) { | |
1387 | fsavl_destroy(fsavl); | |
1388 | nvlist_free(fss); | |
428870ff | 1389 | err = errno; |
428870ff | 1390 | goto stderr_out; |
34dc7c2f BB |
1391 | } |
1392 | } | |
1393 | } | |
1394 | ||
1395 | /* dump each stream */ | |
1396 | sdd.fromsnap = fromsnap; | |
1397 | sdd.tosnap = tosnap; | |
428870ff BB |
1398 | if (flags.dedup) |
1399 | sdd.outfd = pipefd[0]; | |
1400 | else | |
1401 | sdd.outfd = outfd; | |
1402 | sdd.replicate = flags.replicate; | |
1403 | sdd.doall = flags.doall; | |
1404 | sdd.fromorigin = flags.fromorigin; | |
34dc7c2f BB |
1405 | sdd.fss = fss; |
1406 | sdd.fsavl = fsavl; | |
428870ff BB |
1407 | sdd.verbose = flags.verbose; |
1408 | sdd.filter_cb = filter_func; | |
1409 | sdd.filter_cb_arg = cb_arg; | |
1410 | if (debugnvp) | |
1411 | sdd.debugnv = *debugnvp; | |
572e2857 BB |
1412 | if (holdsnaps) { |
1413 | ++holdseq; | |
1414 | (void) snprintf(sdd.holdtag, sizeof (sdd.holdtag), | |
1415 | ".send-%d-%llu", getpid(), (u_longlong_t)holdseq); | |
1416 | sdd.cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL); | |
1417 | if (sdd.cleanup_fd < 0) { | |
1418 | err = errno; | |
1419 | goto stderr_out; | |
1420 | } | |
1421 | } else { | |
1422 | sdd.cleanup_fd = -1; | |
1423 | } | |
34dc7c2f BB |
1424 | err = dump_filesystems(zhp, &sdd); |
1425 | fsavl_destroy(fsavl); | |
1426 | nvlist_free(fss); | |
1427 | ||
428870ff BB |
1428 | if (flags.dedup) { |
1429 | (void) close(pipefd[0]); | |
1430 | (void) pthread_join(tid, NULL); | |
1431 | } | |
1432 | ||
572e2857 BB |
1433 | if (sdd.cleanup_fd != -1) { |
1434 | VERIFY(0 == close(sdd.cleanup_fd)); | |
1435 | sdd.cleanup_fd = -1; | |
1436 | } | |
1437 | ||
428870ff | 1438 | if (flags.replicate || flags.doall || flags.props) { |
34dc7c2f BB |
1439 | /* |
1440 | * write final end record. NB: want to do this even if | |
1441 | * there was some error, because it might not be totally | |
1442 | * failed. | |
1443 | */ | |
1444 | dmu_replay_record_t drr = { 0 }; | |
1445 | drr.drr_type = DRR_END; | |
1446 | if (write(outfd, &drr, sizeof (drr)) == -1) { | |
1447 | return (zfs_standard_error(zhp->zfs_hdl, | |
1448 | errno, errbuf)); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | return (err || sdd.err); | |
428870ff BB |
1453 | |
1454 | stderr_out: | |
1455 | err = zfs_standard_error(zhp->zfs_hdl, err, errbuf); | |
1456 | err_out: | |
572e2857 BB |
1457 | if (sdd.cleanup_fd != -1) |
1458 | VERIFY(0 == close(sdd.cleanup_fd)); | |
428870ff BB |
1459 | if (flags.dedup) { |
1460 | (void) pthread_cancel(tid); | |
1461 | (void) pthread_join(tid, NULL); | |
1462 | (void) close(pipefd[0]); | |
1463 | } | |
1464 | return (err); | |
34dc7c2f BB |
1465 | } |
1466 | ||
1467 | /* | |
1468 | * Routines specific to "zfs recv" | |
1469 | */ | |
1470 | ||
1471 | static int | |
1472 | recv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen, | |
1473 | boolean_t byteswap, zio_cksum_t *zc) | |
1474 | { | |
1475 | char *cp = buf; | |
1476 | int rv; | |
1477 | int len = ilen; | |
1478 | ||
1479 | do { | |
1480 | rv = read(fd, cp, len); | |
1481 | cp += rv; | |
1482 | len -= rv; | |
1483 | } while (rv > 0); | |
1484 | ||
1485 | if (rv < 0 || len != 0) { | |
1486 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1487 | "failed to read from stream")); | |
1488 | return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN, | |
1489 | "cannot receive"))); | |
1490 | } | |
1491 | ||
1492 | if (zc) { | |
1493 | if (byteswap) | |
1494 | fletcher_4_incremental_byteswap(buf, ilen, zc); | |
1495 | else | |
1496 | fletcher_4_incremental_native(buf, ilen, zc); | |
1497 | } | |
1498 | return (0); | |
1499 | } | |
1500 | ||
1501 | static int | |
1502 | recv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp, | |
1503 | boolean_t byteswap, zio_cksum_t *zc) | |
1504 | { | |
1505 | char *buf; | |
1506 | int err; | |
1507 | ||
1508 | buf = zfs_alloc(hdl, len); | |
1509 | if (buf == NULL) | |
1510 | return (ENOMEM); | |
1511 | ||
1512 | err = recv_read(hdl, fd, buf, len, byteswap, zc); | |
1513 | if (err != 0) { | |
1514 | free(buf); | |
1515 | return (err); | |
1516 | } | |
1517 | ||
1518 | err = nvlist_unpack(buf, len, nvp, 0); | |
1519 | free(buf); | |
1520 | if (err != 0) { | |
1521 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
1522 | "stream (malformed nvlist)")); | |
1523 | return (EINVAL); | |
1524 | } | |
1525 | return (0); | |
1526 | } | |
1527 | ||
1528 | static int | |
1529 | recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname, | |
1530 | int baselen, char *newname, recvflags_t flags) | |
1531 | { | |
1532 | static int seq; | |
1533 | zfs_cmd_t zc = { 0 }; | |
1534 | int err; | |
1535 | prop_changelist_t *clp; | |
1536 | zfs_handle_t *zhp; | |
1537 | ||
1538 | zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); | |
1539 | if (zhp == NULL) | |
1540 | return (-1); | |
b128c09f BB |
1541 | clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, |
1542 | flags.force ? MS_FORCE : 0); | |
34dc7c2f BB |
1543 | zfs_close(zhp); |
1544 | if (clp == NULL) | |
1545 | return (-1); | |
1546 | err = changelist_prefix(clp); | |
1547 | if (err) | |
1548 | return (err); | |
1549 | ||
45d1cae3 BB |
1550 | zc.zc_objset_type = DMU_OST_ZFS; |
1551 | (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); | |
1552 | ||
34dc7c2f BB |
1553 | if (tryname) { |
1554 | (void) strcpy(newname, tryname); | |
1555 | ||
34dc7c2f BB |
1556 | (void) strlcpy(zc.zc_value, tryname, sizeof (zc.zc_value)); |
1557 | ||
1558 | if (flags.verbose) { | |
1559 | (void) printf("attempting rename %s to %s\n", | |
1560 | zc.zc_name, zc.zc_value); | |
1561 | } | |
1562 | err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); | |
1563 | if (err == 0) | |
1564 | changelist_rename(clp, name, tryname); | |
1565 | } else { | |
1566 | err = ENOENT; | |
1567 | } | |
1568 | ||
1569 | if (err != 0 && strncmp(name+baselen, "recv-", 5) != 0) { | |
1570 | seq++; | |
1571 | ||
1572 | (void) strncpy(newname, name, baselen); | |
1573 | (void) snprintf(newname+baselen, ZFS_MAXNAMELEN-baselen, | |
1574 | "recv-%u-%u", getpid(), seq); | |
1575 | (void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value)); | |
1576 | ||
1577 | if (flags.verbose) { | |
1578 | (void) printf("failed - trying rename %s to %s\n", | |
1579 | zc.zc_name, zc.zc_value); | |
1580 | } | |
1581 | err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); | |
1582 | if (err == 0) | |
1583 | changelist_rename(clp, name, newname); | |
1584 | if (err && flags.verbose) { | |
1585 | (void) printf("failed (%u) - " | |
1586 | "will try again on next pass\n", errno); | |
1587 | } | |
1588 | err = EAGAIN; | |
1589 | } else if (flags.verbose) { | |
1590 | if (err == 0) | |
1591 | (void) printf("success\n"); | |
1592 | else | |
1593 | (void) printf("failed (%u)\n", errno); | |
1594 | } | |
1595 | ||
1596 | (void) changelist_postfix(clp); | |
1597 | changelist_free(clp); | |
1598 | ||
1599 | return (err); | |
1600 | } | |
1601 | ||
1602 | static int | |
1603 | recv_destroy(libzfs_handle_t *hdl, const char *name, int baselen, | |
1604 | char *newname, recvflags_t flags) | |
1605 | { | |
1606 | zfs_cmd_t zc = { 0 }; | |
1607 | int err = 0; | |
1608 | prop_changelist_t *clp; | |
1609 | zfs_handle_t *zhp; | |
45d1cae3 BB |
1610 | boolean_t defer = B_FALSE; |
1611 | int spa_version; | |
34dc7c2f BB |
1612 | |
1613 | zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); | |
1614 | if (zhp == NULL) | |
1615 | return (-1); | |
b128c09f BB |
1616 | clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, |
1617 | flags.force ? MS_FORCE : 0); | |
45d1cae3 BB |
1618 | if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && |
1619 | zfs_spa_version(zhp, &spa_version) == 0 && | |
1620 | spa_version >= SPA_VERSION_USERREFS) | |
1621 | defer = B_TRUE; | |
34dc7c2f BB |
1622 | zfs_close(zhp); |
1623 | if (clp == NULL) | |
1624 | return (-1); | |
1625 | err = changelist_prefix(clp); | |
1626 | if (err) | |
1627 | return (err); | |
1628 | ||
1629 | zc.zc_objset_type = DMU_OST_ZFS; | |
45d1cae3 | 1630 | zc.zc_defer_destroy = defer; |
34dc7c2f BB |
1631 | (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); |
1632 | ||
1633 | if (flags.verbose) | |
1634 | (void) printf("attempting destroy %s\n", zc.zc_name); | |
1635 | err = ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc); | |
34dc7c2f BB |
1636 | if (err == 0) { |
1637 | if (flags.verbose) | |
1638 | (void) printf("success\n"); | |
1639 | changelist_remove(clp, zc.zc_name); | |
1640 | } | |
1641 | ||
1642 | (void) changelist_postfix(clp); | |
1643 | changelist_free(clp); | |
1644 | ||
45d1cae3 | 1645 | /* |
428870ff BB |
1646 | * Deferred destroy might destroy the snapshot or only mark it to be |
1647 | * destroyed later, and it returns success in either case. | |
45d1cae3 | 1648 | */ |
428870ff BB |
1649 | if (err != 0 || (defer && zfs_dataset_exists(hdl, name, |
1650 | ZFS_TYPE_SNAPSHOT))) { | |
34dc7c2f | 1651 | err = recv_rename(hdl, name, NULL, baselen, newname, flags); |
428870ff | 1652 | } |
34dc7c2f BB |
1653 | |
1654 | return (err); | |
1655 | } | |
1656 | ||
1657 | typedef struct guid_to_name_data { | |
1658 | uint64_t guid; | |
1659 | char *name; | |
1660 | } guid_to_name_data_t; | |
1661 | ||
1662 | static int | |
1663 | guid_to_name_cb(zfs_handle_t *zhp, void *arg) | |
1664 | { | |
1665 | guid_to_name_data_t *gtnd = arg; | |
1666 | int err; | |
1667 | ||
1668 | if (zhp->zfs_dmustats.dds_guid == gtnd->guid) { | |
1669 | (void) strcpy(gtnd->name, zhp->zfs_name); | |
428870ff | 1670 | zfs_close(zhp); |
34dc7c2f BB |
1671 | return (EEXIST); |
1672 | } | |
1673 | err = zfs_iter_children(zhp, guid_to_name_cb, gtnd); | |
1674 | zfs_close(zhp); | |
1675 | return (err); | |
1676 | } | |
1677 | ||
1678 | static int | |
1679 | guid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid, | |
1680 | char *name) | |
1681 | { | |
1682 | /* exhaustive search all local snapshots */ | |
1683 | guid_to_name_data_t gtnd; | |
1684 | int err = 0; | |
1685 | zfs_handle_t *zhp; | |
1686 | char *cp; | |
1687 | ||
1688 | gtnd.guid = guid; | |
1689 | gtnd.name = name; | |
1690 | ||
1691 | if (strchr(parent, '@') == NULL) { | |
1692 | zhp = make_dataset_handle(hdl, parent); | |
1693 | if (zhp != NULL) { | |
1694 | err = zfs_iter_children(zhp, guid_to_name_cb, >nd); | |
1695 | zfs_close(zhp); | |
1696 | if (err == EEXIST) | |
1697 | return (0); | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | cp = strchr(parent, '/'); | |
1702 | if (cp) | |
1703 | *cp = '\0'; | |
1704 | zhp = make_dataset_handle(hdl, parent); | |
1705 | if (cp) | |
1706 | *cp = '/'; | |
1707 | ||
1708 | if (zhp) { | |
1709 | err = zfs_iter_children(zhp, guid_to_name_cb, >nd); | |
1710 | zfs_close(zhp); | |
1711 | } | |
1712 | ||
1713 | return (err == EEXIST ? 0 : ENOENT); | |
1714 | ||
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * Return true if dataset guid1 is created before guid2. | |
1719 | */ | |
1720 | static int | |
1721 | created_before(libzfs_handle_t *hdl, avl_tree_t *avl, | |
1722 | uint64_t guid1, uint64_t guid2) | |
1723 | { | |
1724 | nvlist_t *nvfs; | |
1725 | char *fsname, *snapname; | |
1726 | char buf[ZFS_MAXNAMELEN]; | |
1727 | int rv; | |
1728 | zfs_node_t zn1, zn2; | |
1729 | ||
1730 | if (guid2 == 0) | |
1731 | return (0); | |
1732 | if (guid1 == 0) | |
1733 | return (1); | |
1734 | ||
1735 | nvfs = fsavl_find(avl, guid1, &snapname); | |
1736 | VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
1737 | (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); | |
1738 | zn1.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); | |
1739 | if (zn1.zn_handle == NULL) | |
1740 | return (-1); | |
1741 | ||
1742 | nvfs = fsavl_find(avl, guid2, &snapname); | |
1743 | VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
1744 | (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); | |
1745 | zn2.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); | |
1746 | if (zn2.zn_handle == NULL) { | |
1747 | zfs_close(zn2.zn_handle); | |
1748 | return (-1); | |
1749 | } | |
1750 | ||
1751 | rv = (zfs_snapshot_compare(&zn1, &zn2) == -1); | |
1752 | ||
1753 | zfs_close(zn1.zn_handle); | |
1754 | zfs_close(zn2.zn_handle); | |
1755 | ||
1756 | return (rv); | |
1757 | } | |
1758 | ||
1759 | static int | |
1760 | recv_incremental_replication(libzfs_handle_t *hdl, const char *tofs, | |
428870ff BB |
1761 | recvflags_t flags, nvlist_t *stream_nv, avl_tree_t *stream_avl, |
1762 | nvlist_t *renamed) | |
34dc7c2f BB |
1763 | { |
1764 | nvlist_t *local_nv; | |
1765 | avl_tree_t *local_avl; | |
1766 | nvpair_t *fselem, *nextfselem; | |
428870ff | 1767 | char *fromsnap; |
34dc7c2f BB |
1768 | char newname[ZFS_MAXNAMELEN]; |
1769 | int error; | |
428870ff BB |
1770 | boolean_t needagain, progress, recursive; |
1771 | char *s1, *s2; | |
34dc7c2f BB |
1772 | |
1773 | VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap)); | |
428870ff BB |
1774 | |
1775 | recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") == | |
1776 | ENOENT); | |
34dc7c2f BB |
1777 | |
1778 | if (flags.dryrun) | |
1779 | return (0); | |
1780 | ||
1781 | again: | |
1782 | needagain = progress = B_FALSE; | |
1783 | ||
1784 | if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL, | |
428870ff | 1785 | recursive, &local_nv, &local_avl)) != 0) |
34dc7c2f BB |
1786 | return (error); |
1787 | ||
1788 | /* | |
1789 | * Process deletes and renames | |
1790 | */ | |
1791 | for (fselem = nvlist_next_nvpair(local_nv, NULL); | |
1792 | fselem; fselem = nextfselem) { | |
1793 | nvlist_t *nvfs, *snaps; | |
1794 | nvlist_t *stream_nvfs = NULL; | |
1795 | nvpair_t *snapelem, *nextsnapelem; | |
1796 | uint64_t fromguid = 0; | |
1797 | uint64_t originguid = 0; | |
1798 | uint64_t stream_originguid = 0; | |
1799 | uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid; | |
1800 | char *fsname, *stream_fsname; | |
1801 | ||
1802 | nextfselem = nvlist_next_nvpair(local_nv, fselem); | |
1803 | ||
1804 | VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); | |
1805 | VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); | |
1806 | VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
1807 | VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap", | |
1808 | &parent_fromsnap_guid)); | |
1809 | (void) nvlist_lookup_uint64(nvfs, "origin", &originguid); | |
1810 | ||
1811 | /* | |
1812 | * First find the stream's fs, so we can check for | |
1813 | * a different origin (due to "zfs promote") | |
1814 | */ | |
1815 | for (snapelem = nvlist_next_nvpair(snaps, NULL); | |
1816 | snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) { | |
1817 | uint64_t thisguid; | |
1818 | ||
1819 | VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); | |
1820 | stream_nvfs = fsavl_find(stream_avl, thisguid, NULL); | |
1821 | ||
1822 | if (stream_nvfs != NULL) | |
1823 | break; | |
1824 | } | |
1825 | ||
1826 | /* check for promote */ | |
1827 | (void) nvlist_lookup_uint64(stream_nvfs, "origin", | |
1828 | &stream_originguid); | |
1829 | if (stream_nvfs && originguid != stream_originguid) { | |
1830 | switch (created_before(hdl, local_avl, | |
1831 | stream_originguid, originguid)) { | |
1832 | case 1: { | |
1833 | /* promote it! */ | |
1834 | zfs_cmd_t zc = { 0 }; | |
1835 | nvlist_t *origin_nvfs; | |
1836 | char *origin_fsname; | |
1837 | ||
1838 | if (flags.verbose) | |
1839 | (void) printf("promoting %s\n", fsname); | |
1840 | ||
1841 | origin_nvfs = fsavl_find(local_avl, originguid, | |
1842 | NULL); | |
1843 | VERIFY(0 == nvlist_lookup_string(origin_nvfs, | |
1844 | "name", &origin_fsname)); | |
1845 | (void) strlcpy(zc.zc_value, origin_fsname, | |
1846 | sizeof (zc.zc_value)); | |
1847 | (void) strlcpy(zc.zc_name, fsname, | |
1848 | sizeof (zc.zc_name)); | |
1849 | error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); | |
1850 | if (error == 0) | |
1851 | progress = B_TRUE; | |
1852 | break; | |
1853 | } | |
1854 | default: | |
1855 | break; | |
1856 | case -1: | |
1857 | fsavl_destroy(local_avl); | |
1858 | nvlist_free(local_nv); | |
1859 | return (-1); | |
1860 | } | |
1861 | /* | |
1862 | * We had/have the wrong origin, therefore our | |
1863 | * list of snapshots is wrong. Need to handle | |
1864 | * them on the next pass. | |
1865 | */ | |
1866 | needagain = B_TRUE; | |
1867 | continue; | |
1868 | } | |
1869 | ||
1870 | for (snapelem = nvlist_next_nvpair(snaps, NULL); | |
1871 | snapelem; snapelem = nextsnapelem) { | |
1872 | uint64_t thisguid; | |
1873 | char *stream_snapname; | |
b128c09f | 1874 | nvlist_t *found, *props; |
34dc7c2f BB |
1875 | |
1876 | nextsnapelem = nvlist_next_nvpair(snaps, snapelem); | |
1877 | ||
1878 | VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); | |
1879 | found = fsavl_find(stream_avl, thisguid, | |
1880 | &stream_snapname); | |
1881 | ||
1882 | /* check for delete */ | |
1883 | if (found == NULL) { | |
1884 | char name[ZFS_MAXNAMELEN]; | |
1885 | ||
1886 | if (!flags.force) | |
1887 | continue; | |
1888 | ||
1889 | (void) snprintf(name, sizeof (name), "%s@%s", | |
1890 | fsname, nvpair_name(snapelem)); | |
1891 | ||
1892 | error = recv_destroy(hdl, name, | |
1893 | strlen(fsname)+1, newname, flags); | |
1894 | if (error) | |
1895 | needagain = B_TRUE; | |
1896 | else | |
1897 | progress = B_TRUE; | |
1898 | continue; | |
1899 | } | |
1900 | ||
1901 | stream_nvfs = found; | |
1902 | ||
b128c09f BB |
1903 | if (0 == nvlist_lookup_nvlist(stream_nvfs, "snapprops", |
1904 | &props) && 0 == nvlist_lookup_nvlist(props, | |
1905 | stream_snapname, &props)) { | |
1906 | zfs_cmd_t zc = { 0 }; | |
1907 | ||
428870ff | 1908 | zc.zc_cookie = B_TRUE; /* received */ |
b128c09f BB |
1909 | (void) snprintf(zc.zc_name, sizeof (zc.zc_name), |
1910 | "%s@%s", fsname, nvpair_name(snapelem)); | |
1911 | if (zcmd_write_src_nvlist(hdl, &zc, | |
1912 | props) == 0) { | |
1913 | (void) zfs_ioctl(hdl, | |
1914 | ZFS_IOC_SET_PROP, &zc); | |
1915 | zcmd_free_nvlists(&zc); | |
1916 | } | |
1917 | } | |
1918 | ||
34dc7c2f BB |
1919 | /* check for different snapname */ |
1920 | if (strcmp(nvpair_name(snapelem), | |
1921 | stream_snapname) != 0) { | |
1922 | char name[ZFS_MAXNAMELEN]; | |
1923 | char tryname[ZFS_MAXNAMELEN]; | |
1924 | ||
1925 | (void) snprintf(name, sizeof (name), "%s@%s", | |
1926 | fsname, nvpair_name(snapelem)); | |
1927 | (void) snprintf(tryname, sizeof (name), "%s@%s", | |
1928 | fsname, stream_snapname); | |
1929 | ||
1930 | error = recv_rename(hdl, name, tryname, | |
1931 | strlen(fsname)+1, newname, flags); | |
1932 | if (error) | |
1933 | needagain = B_TRUE; | |
1934 | else | |
1935 | progress = B_TRUE; | |
1936 | } | |
1937 | ||
1938 | if (strcmp(stream_snapname, fromsnap) == 0) | |
1939 | fromguid = thisguid; | |
1940 | } | |
1941 | ||
1942 | /* check for delete */ | |
1943 | if (stream_nvfs == NULL) { | |
1944 | if (!flags.force) | |
1945 | continue; | |
1946 | ||
1947 | error = recv_destroy(hdl, fsname, strlen(tofs)+1, | |
1948 | newname, flags); | |
1949 | if (error) | |
1950 | needagain = B_TRUE; | |
1951 | else | |
1952 | progress = B_TRUE; | |
1953 | continue; | |
1954 | } | |
1955 | ||
428870ff BB |
1956 | if (fromguid == 0) { |
1957 | if (flags.verbose) { | |
1958 | (void) printf("local fs %s does not have " | |
1959 | "fromsnap (%s in stream); must have " | |
1960 | "been deleted locally; ignoring\n", | |
1961 | fsname, fromsnap); | |
1962 | } | |
34dc7c2f BB |
1963 | continue; |
1964 | } | |
1965 | ||
1966 | VERIFY(0 == nvlist_lookup_string(stream_nvfs, | |
1967 | "name", &stream_fsname)); | |
1968 | VERIFY(0 == nvlist_lookup_uint64(stream_nvfs, | |
1969 | "parentfromsnap", &stream_parent_fromsnap_guid)); | |
1970 | ||
428870ff BB |
1971 | s1 = strrchr(fsname, '/'); |
1972 | s2 = strrchr(stream_fsname, '/'); | |
1973 | ||
1974 | /* | |
1975 | * Check for rename. If the exact receive path is specified, it | |
1976 | * does not count as a rename, but we still need to check the | |
1977 | * datasets beneath it. | |
1978 | */ | |
34dc7c2f | 1979 | if ((stream_parent_fromsnap_guid != 0 && |
428870ff | 1980 | parent_fromsnap_guid != 0 && |
34dc7c2f | 1981 | stream_parent_fromsnap_guid != parent_fromsnap_guid) || |
428870ff BB |
1982 | ((flags.isprefix || strcmp(tofs, fsname) != 0) && |
1983 | (s1 != NULL) && (s2 != NULL) && strcmp(s1, s2) != 0)) { | |
34dc7c2f BB |
1984 | nvlist_t *parent; |
1985 | char tryname[ZFS_MAXNAMELEN]; | |
1986 | ||
1987 | parent = fsavl_find(local_avl, | |
1988 | stream_parent_fromsnap_guid, NULL); | |
1989 | /* | |
1990 | * NB: parent might not be found if we used the | |
1991 | * tosnap for stream_parent_fromsnap_guid, | |
1992 | * because the parent is a newly-created fs; | |
1993 | * we'll be able to rename it after we recv the | |
1994 | * new fs. | |
1995 | */ | |
1996 | if (parent != NULL) { | |
1997 | char *pname; | |
1998 | ||
1999 | VERIFY(0 == nvlist_lookup_string(parent, "name", | |
2000 | &pname)); | |
2001 | (void) snprintf(tryname, sizeof (tryname), | |
2002 | "%s%s", pname, strrchr(stream_fsname, '/')); | |
2003 | } else { | |
2004 | tryname[0] = '\0'; | |
2005 | if (flags.verbose) { | |
2006 | (void) printf("local fs %s new parent " | |
2007 | "not found\n", fsname); | |
2008 | } | |
2009 | } | |
2010 | ||
428870ff BB |
2011 | newname[0] = '\0'; |
2012 | ||
34dc7c2f BB |
2013 | error = recv_rename(hdl, fsname, tryname, |
2014 | strlen(tofs)+1, newname, flags); | |
428870ff BB |
2015 | |
2016 | if (renamed != NULL && newname[0] != '\0') { | |
2017 | VERIFY(0 == nvlist_add_boolean(renamed, | |
2018 | newname)); | |
2019 | } | |
2020 | ||
34dc7c2f BB |
2021 | if (error) |
2022 | needagain = B_TRUE; | |
2023 | else | |
2024 | progress = B_TRUE; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | fsavl_destroy(local_avl); | |
2029 | nvlist_free(local_nv); | |
2030 | ||
2031 | if (needagain && progress) { | |
2032 | /* do another pass to fix up temporary names */ | |
2033 | if (flags.verbose) | |
2034 | (void) printf("another pass:\n"); | |
2035 | goto again; | |
2036 | } | |
2037 | ||
2038 | return (needagain); | |
2039 | } | |
2040 | ||
2041 | static int | |
2042 | zfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname, | |
b128c09f | 2043 | recvflags_t flags, dmu_replay_record_t *drr, zio_cksum_t *zc, |
572e2857 | 2044 | char **top_zfs, int cleanup_fd, uint64_t *action_handlep) |
34dc7c2f BB |
2045 | { |
2046 | nvlist_t *stream_nv = NULL; | |
2047 | avl_tree_t *stream_avl = NULL; | |
2048 | char *fromsnap = NULL; | |
428870ff | 2049 | char *cp; |
34dc7c2f | 2050 | char tofs[ZFS_MAXNAMELEN]; |
428870ff | 2051 | char sendfs[ZFS_MAXNAMELEN]; |
34dc7c2f BB |
2052 | char errbuf[1024]; |
2053 | dmu_replay_record_t drre; | |
2054 | int error; | |
2055 | boolean_t anyerr = B_FALSE; | |
2056 | boolean_t softerr = B_FALSE; | |
428870ff | 2057 | boolean_t recursive; |
34dc7c2f BB |
2058 | |
2059 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
2060 | "cannot receive")); | |
2061 | ||
34dc7c2f BB |
2062 | assert(drr->drr_type == DRR_BEGIN); |
2063 | assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC); | |
428870ff BB |
2064 | assert(DMU_GET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo) == |
2065 | DMU_COMPOUNDSTREAM); | |
34dc7c2f BB |
2066 | |
2067 | /* | |
2068 | * Read in the nvlist from the stream. | |
2069 | */ | |
2070 | if (drr->drr_payloadlen != 0) { | |
34dc7c2f BB |
2071 | error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen, |
2072 | &stream_nv, flags.byteswap, zc); | |
2073 | if (error) { | |
2074 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
2075 | goto out; | |
2076 | } | |
2077 | } | |
2078 | ||
428870ff BB |
2079 | recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") == |
2080 | ENOENT); | |
2081 | ||
2082 | if (recursive && strchr(destname, '@')) { | |
2083 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2084 | "cannot specify snapshot name for multi-snapshot stream")); | |
2085 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
2086 | goto out; | |
2087 | } | |
2088 | ||
34dc7c2f BB |
2089 | /* |
2090 | * Read in the end record and verify checksum. | |
2091 | */ | |
2092 | if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre), | |
2093 | flags.byteswap, NULL))) | |
2094 | goto out; | |
2095 | if (flags.byteswap) { | |
2096 | drre.drr_type = BSWAP_32(drre.drr_type); | |
2097 | drre.drr_u.drr_end.drr_checksum.zc_word[0] = | |
2098 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]); | |
2099 | drre.drr_u.drr_end.drr_checksum.zc_word[1] = | |
2100 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]); | |
2101 | drre.drr_u.drr_end.drr_checksum.zc_word[2] = | |
2102 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]); | |
2103 | drre.drr_u.drr_end.drr_checksum.zc_word[3] = | |
2104 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]); | |
2105 | } | |
2106 | if (drre.drr_type != DRR_END) { | |
2107 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
2108 | goto out; | |
2109 | } | |
2110 | if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) { | |
2111 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2112 | "incorrect header checksum")); | |
2113 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
2114 | goto out; | |
2115 | } | |
2116 | ||
2117 | (void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap); | |
2118 | ||
2119 | if (drr->drr_payloadlen != 0) { | |
2120 | nvlist_t *stream_fss; | |
2121 | ||
2122 | VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss", | |
2123 | &stream_fss)); | |
2124 | if ((stream_avl = fsavl_create(stream_fss)) == NULL) { | |
2125 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2126 | "couldn't allocate avl tree")); | |
2127 | error = zfs_error(hdl, EZFS_NOMEM, errbuf); | |
2128 | goto out; | |
2129 | } | |
2130 | ||
2131 | if (fromsnap != NULL) { | |
428870ff BB |
2132 | nvlist_t *renamed = NULL; |
2133 | nvpair_t *pair = NULL; | |
2134 | ||
34dc7c2f BB |
2135 | (void) strlcpy(tofs, destname, ZFS_MAXNAMELEN); |
2136 | if (flags.isprefix) { | |
428870ff BB |
2137 | struct drr_begin *drrb = &drr->drr_u.drr_begin; |
2138 | int i; | |
2139 | ||
2140 | if (flags.istail) { | |
2141 | cp = strrchr(drrb->drr_toname, '/'); | |
2142 | if (cp == NULL) { | |
2143 | (void) strlcat(tofs, "/", | |
2144 | ZFS_MAXNAMELEN); | |
2145 | i = 0; | |
2146 | } else { | |
2147 | i = (cp - drrb->drr_toname); | |
2148 | } | |
2149 | } else { | |
2150 | i = strcspn(drrb->drr_toname, "/@"); | |
2151 | } | |
34dc7c2f | 2152 | /* zfs_receive_one() will create_parents() */ |
428870ff | 2153 | (void) strlcat(tofs, &drrb->drr_toname[i], |
34dc7c2f BB |
2154 | ZFS_MAXNAMELEN); |
2155 | *strchr(tofs, '@') = '\0'; | |
2156 | } | |
428870ff BB |
2157 | |
2158 | if (recursive && !flags.dryrun && !flags.nomount) { | |
2159 | VERIFY(0 == nvlist_alloc(&renamed, | |
2160 | NV_UNIQUE_NAME, 0)); | |
2161 | } | |
2162 | ||
2163 | softerr = recv_incremental_replication(hdl, tofs, flags, | |
2164 | stream_nv, stream_avl, renamed); | |
2165 | ||
2166 | /* Unmount renamed filesystems before receiving. */ | |
2167 | while ((pair = nvlist_next_nvpair(renamed, | |
2168 | pair)) != NULL) { | |
2169 | zfs_handle_t *zhp; | |
2170 | prop_changelist_t *clp = NULL; | |
2171 | ||
2172 | zhp = zfs_open(hdl, nvpair_name(pair), | |
2173 | ZFS_TYPE_FILESYSTEM); | |
2174 | if (zhp != NULL) { | |
2175 | clp = changelist_gather(zhp, | |
2176 | ZFS_PROP_MOUNTPOINT, 0, 0); | |
2177 | zfs_close(zhp); | |
2178 | if (clp != NULL) { | |
2179 | softerr |= | |
2180 | changelist_prefix(clp); | |
2181 | changelist_free(clp); | |
2182 | } | |
2183 | } | |
2184 | } | |
2185 | ||
2186 | nvlist_free(renamed); | |
34dc7c2f BB |
2187 | } |
2188 | } | |
2189 | ||
428870ff BB |
2190 | /* |
2191 | * Get the fs specified by the first path in the stream (the top level | |
2192 | * specified by 'zfs send') and pass it to each invocation of | |
2193 | * zfs_receive_one(). | |
2194 | */ | |
2195 | (void) strlcpy(sendfs, drr->drr_u.drr_begin.drr_toname, | |
2196 | ZFS_MAXNAMELEN); | |
2197 | if ((cp = strchr(sendfs, '@')) != NULL) | |
2198 | *cp = '\0'; | |
34dc7c2f BB |
2199 | |
2200 | /* Finally, receive each contained stream */ | |
2201 | do { | |
2202 | /* | |
2203 | * we should figure out if it has a recoverable | |
2204 | * error, in which case do a recv_skip() and drive on. | |
2205 | * Note, if we fail due to already having this guid, | |
2206 | * zfs_receive_one() will take care of it (ie, | |
2207 | * recv_skip() and return 0). | |
2208 | */ | |
b128c09f | 2209 | error = zfs_receive_impl(hdl, destname, flags, fd, |
572e2857 BB |
2210 | sendfs, stream_nv, stream_avl, top_zfs, cleanup_fd, |
2211 | action_handlep); | |
34dc7c2f BB |
2212 | if (error == ENODATA) { |
2213 | error = 0; | |
2214 | break; | |
2215 | } | |
2216 | anyerr |= error; | |
2217 | } while (error == 0); | |
2218 | ||
2219 | if (drr->drr_payloadlen != 0 && fromsnap != NULL) { | |
2220 | /* | |
2221 | * Now that we have the fs's they sent us, try the | |
2222 | * renames again. | |
2223 | */ | |
2224 | softerr = recv_incremental_replication(hdl, tofs, flags, | |
428870ff | 2225 | stream_nv, stream_avl, NULL); |
34dc7c2f BB |
2226 | } |
2227 | ||
2228 | out: | |
2229 | fsavl_destroy(stream_avl); | |
2230 | if (stream_nv) | |
2231 | nvlist_free(stream_nv); | |
2232 | if (softerr) | |
2233 | error = -2; | |
2234 | if (anyerr) | |
2235 | error = -1; | |
2236 | return (error); | |
2237 | } | |
2238 | ||
428870ff BB |
2239 | static void |
2240 | trunc_prop_errs(int truncated) | |
2241 | { | |
2242 | ASSERT(truncated != 0); | |
2243 | ||
2244 | if (truncated == 1) | |
2245 | (void) fprintf(stderr, dgettext(TEXT_DOMAIN, | |
2246 | "1 more property could not be set\n")); | |
2247 | else | |
2248 | (void) fprintf(stderr, dgettext(TEXT_DOMAIN, | |
2249 | "%d more properties could not be set\n"), truncated); | |
2250 | } | |
2251 | ||
34dc7c2f BB |
2252 | static int |
2253 | recv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap) | |
2254 | { | |
2255 | dmu_replay_record_t *drr; | |
2256 | void *buf = malloc(1<<20); | |
428870ff BB |
2257 | char errbuf[1024]; |
2258 | ||
2259 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
2260 | "cannot receive:")); | |
34dc7c2f BB |
2261 | |
2262 | /* XXX would be great to use lseek if possible... */ | |
2263 | drr = buf; | |
2264 | ||
2265 | while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t), | |
2266 | byteswap, NULL) == 0) { | |
2267 | if (byteswap) | |
2268 | drr->drr_type = BSWAP_32(drr->drr_type); | |
2269 | ||
2270 | switch (drr->drr_type) { | |
2271 | case DRR_BEGIN: | |
2272 | /* NB: not to be used on v2 stream packages */ | |
428870ff BB |
2273 | if (drr->drr_payloadlen != 0) { |
2274 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2275 | "invalid substream header")); | |
2276 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2277 | } | |
34dc7c2f BB |
2278 | break; |
2279 | ||
2280 | case DRR_END: | |
2281 | free(buf); | |
2282 | return (0); | |
2283 | ||
2284 | case DRR_OBJECT: | |
2285 | if (byteswap) { | |
2286 | drr->drr_u.drr_object.drr_bonuslen = | |
2287 | BSWAP_32(drr->drr_u.drr_object. | |
2288 | drr_bonuslen); | |
2289 | } | |
2290 | (void) recv_read(hdl, fd, buf, | |
2291 | P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8), | |
2292 | B_FALSE, NULL); | |
2293 | break; | |
2294 | ||
2295 | case DRR_WRITE: | |
2296 | if (byteswap) { | |
2297 | drr->drr_u.drr_write.drr_length = | |
b128c09f | 2298 | BSWAP_64(drr->drr_u.drr_write.drr_length); |
34dc7c2f BB |
2299 | } |
2300 | (void) recv_read(hdl, fd, buf, | |
2301 | drr->drr_u.drr_write.drr_length, B_FALSE, NULL); | |
2302 | break; | |
428870ff BB |
2303 | case DRR_SPILL: |
2304 | if (byteswap) { | |
2305 | drr->drr_u.drr_write.drr_length = | |
2306 | BSWAP_64(drr->drr_u.drr_spill.drr_length); | |
2307 | } | |
2308 | (void) recv_read(hdl, fd, buf, | |
2309 | drr->drr_u.drr_spill.drr_length, B_FALSE, NULL); | |
2310 | break; | |
2311 | case DRR_WRITE_BYREF: | |
34dc7c2f BB |
2312 | case DRR_FREEOBJECTS: |
2313 | case DRR_FREE: | |
2314 | break; | |
2315 | ||
2316 | default: | |
428870ff BB |
2317 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, |
2318 | "invalid record type")); | |
2319 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
34dc7c2f BB |
2320 | } |
2321 | } | |
2322 | ||
2323 | free(buf); | |
2324 | return (-1); | |
2325 | } | |
2326 | ||
2327 | /* | |
2328 | * Restores a backup of tosnap from the file descriptor specified by infd. | |
2329 | */ | |
2330 | static int | |
2331 | zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap, | |
2332 | recvflags_t flags, dmu_replay_record_t *drr, | |
428870ff | 2333 | dmu_replay_record_t *drr_noswap, const char *sendfs, |
572e2857 BB |
2334 | nvlist_t *stream_nv, avl_tree_t *stream_avl, char **top_zfs, int cleanup_fd, |
2335 | uint64_t *action_handlep) | |
34dc7c2f BB |
2336 | { |
2337 | zfs_cmd_t zc = { 0 }; | |
2338 | time_t begin_time; | |
428870ff | 2339 | int ioctl_err, ioctl_errno, err; |
34dc7c2f BB |
2340 | char *cp; |
2341 | struct drr_begin *drrb = &drr->drr_u.drr_begin; | |
2342 | char errbuf[1024]; | |
428870ff BB |
2343 | char prop_errbuf[1024]; |
2344 | const char *chopprefix; | |
34dc7c2f BB |
2345 | boolean_t newfs = B_FALSE; |
2346 | boolean_t stream_wantsnewfs; | |
2347 | uint64_t parent_snapguid = 0; | |
2348 | prop_changelist_t *clp = NULL; | |
b128c09f | 2349 | nvlist_t *snapprops_nvlist = NULL; |
428870ff BB |
2350 | zprop_errflags_t prop_errflags; |
2351 | boolean_t recursive; | |
34dc7c2f BB |
2352 | |
2353 | begin_time = time(NULL); | |
2354 | ||
2355 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
2356 | "cannot receive")); | |
2357 | ||
428870ff BB |
2358 | recursive = (nvlist_lookup_boolean(stream_nv, "not_recursive") == |
2359 | ENOENT); | |
2360 | ||
34dc7c2f | 2361 | if (stream_avl != NULL) { |
b128c09f BB |
2362 | char *snapname; |
2363 | nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid, | |
2364 | &snapname); | |
34dc7c2f BB |
2365 | nvlist_t *props; |
2366 | int ret; | |
2367 | ||
2368 | (void) nvlist_lookup_uint64(fs, "parentfromsnap", | |
2369 | &parent_snapguid); | |
2370 | err = nvlist_lookup_nvlist(fs, "props", &props); | |
2371 | if (err) | |
2372 | VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0)); | |
2373 | ||
2374 | if (flags.canmountoff) { | |
2375 | VERIFY(0 == nvlist_add_uint64(props, | |
2376 | zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0)); | |
2377 | } | |
2378 | ret = zcmd_write_src_nvlist(hdl, &zc, props); | |
2379 | if (err) | |
2380 | nvlist_free(props); | |
2381 | ||
b128c09f BB |
2382 | if (0 == nvlist_lookup_nvlist(fs, "snapprops", &props)) { |
2383 | VERIFY(0 == nvlist_lookup_nvlist(props, | |
2384 | snapname, &snapprops_nvlist)); | |
2385 | } | |
2386 | ||
34dc7c2f BB |
2387 | if (ret != 0) |
2388 | return (-1); | |
2389 | } | |
2390 | ||
428870ff BB |
2391 | cp = NULL; |
2392 | ||
34dc7c2f BB |
2393 | /* |
2394 | * Determine how much of the snapshot name stored in the stream | |
2395 | * we are going to tack on to the name they specified on the | |
2396 | * command line, and how much we are going to chop off. | |
2397 | * | |
2398 | * If they specified a snapshot, chop the entire name stored in | |
2399 | * the stream. | |
2400 | */ | |
428870ff BB |
2401 | if (flags.istail) { |
2402 | /* | |
2403 | * A filesystem was specified with -e. We want to tack on only | |
2404 | * the tail of the sent snapshot path. | |
2405 | */ | |
2406 | if (strchr(tosnap, '@')) { | |
2407 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
2408 | "argument - snapshot not allowed with -e")); | |
2409 | return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); | |
2410 | } | |
2411 | ||
2412 | chopprefix = strrchr(sendfs, '/'); | |
2413 | ||
2414 | if (chopprefix == NULL) { | |
2415 | /* | |
2416 | * The tail is the poolname, so we need to | |
2417 | * prepend a path separator. | |
2418 | */ | |
2419 | int len = strlen(drrb->drr_toname); | |
2420 | cp = malloc(len + 2); | |
2421 | cp[0] = '/'; | |
2422 | (void) strcpy(&cp[1], drrb->drr_toname); | |
2423 | chopprefix = cp; | |
2424 | } else { | |
2425 | chopprefix = drrb->drr_toname + (chopprefix - sendfs); | |
2426 | } | |
2427 | } else if (flags.isprefix) { | |
34dc7c2f | 2428 | /* |
428870ff BB |
2429 | * A filesystem was specified with -d. We want to tack on |
2430 | * everything but the first element of the sent snapshot path | |
2431 | * (all but the pool name). | |
34dc7c2f BB |
2432 | */ |
2433 | if (strchr(tosnap, '@')) { | |
2434 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
2435 | "argument - snapshot not allowed with -d")); | |
2436 | return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); | |
2437 | } | |
428870ff BB |
2438 | |
2439 | chopprefix = strchr(drrb->drr_toname, '/'); | |
2440 | if (chopprefix == NULL) | |
2441 | chopprefix = strchr(drrb->drr_toname, '@'); | |
34dc7c2f BB |
2442 | } else if (strchr(tosnap, '@') == NULL) { |
2443 | /* | |
428870ff BB |
2444 | * If a filesystem was specified without -d or -e, we want to |
2445 | * tack on everything after the fs specified by 'zfs send'. | |
34dc7c2f | 2446 | */ |
428870ff BB |
2447 | chopprefix = drrb->drr_toname + strlen(sendfs); |
2448 | } else { | |
2449 | /* A snapshot was specified as an exact path (no -d or -e). */ | |
2450 | if (recursive) { | |
2451 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2452 | "cannot specify snapshot name for multi-snapshot " | |
2453 | "stream")); | |
2454 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2455 | } | |
2456 | chopprefix = drrb->drr_toname + strlen(drrb->drr_toname); | |
34dc7c2f | 2457 | } |
428870ff BB |
2458 | |
2459 | ASSERT(strstr(drrb->drr_toname, sendfs) == drrb->drr_toname); | |
2460 | ASSERT(chopprefix > drrb->drr_toname); | |
2461 | ASSERT(chopprefix <= drrb->drr_toname + strlen(drrb->drr_toname)); | |
2462 | ASSERT(chopprefix[0] == '/' || chopprefix[0] == '@' || | |
2463 | chopprefix[0] == '\0'); | |
34dc7c2f BB |
2464 | |
2465 | /* | |
2466 | * Determine name of destination snapshot, store in zc_value. | |
2467 | */ | |
428870ff | 2468 | (void) strcpy(zc.zc_top_ds, tosnap); |
34dc7c2f | 2469 | (void) strcpy(zc.zc_value, tosnap); |
428870ff BB |
2470 | (void) strncat(zc.zc_value, chopprefix, sizeof (zc.zc_value)); |
2471 | free(cp); | |
34dc7c2f BB |
2472 | if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT)) { |
2473 | zcmd_free_nvlists(&zc); | |
2474 | return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); | |
2475 | } | |
2476 | ||
2477 | /* | |
2478 | * Determine the name of the origin snapshot, store in zc_string. | |
2479 | */ | |
2480 | if (drrb->drr_flags & DRR_FLAG_CLONE) { | |
2481 | if (guid_to_name(hdl, tosnap, | |
2482 | drrb->drr_fromguid, zc.zc_string) != 0) { | |
2483 | zcmd_free_nvlists(&zc); | |
2484 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2485 | "local origin for clone %s does not exist"), | |
2486 | zc.zc_value); | |
2487 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
2488 | } | |
2489 | if (flags.verbose) | |
2490 | (void) printf("found clone origin %s\n", zc.zc_string); | |
2491 | } | |
2492 | ||
2493 | stream_wantsnewfs = (drrb->drr_fromguid == NULL || | |
2494 | (drrb->drr_flags & DRR_FLAG_CLONE)); | |
2495 | ||
2496 | if (stream_wantsnewfs) { | |
2497 | /* | |
2498 | * if the parent fs does not exist, look for it based on | |
2499 | * the parent snap GUID | |
2500 | */ | |
2501 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
2502 | "cannot receive new filesystem stream")); | |
2503 | ||
2504 | (void) strcpy(zc.zc_name, zc.zc_value); | |
2505 | cp = strrchr(zc.zc_name, '/'); | |
2506 | if (cp) | |
2507 | *cp = '\0'; | |
2508 | if (cp && | |
2509 | !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
2510 | char suffix[ZFS_MAXNAMELEN]; | |
2511 | (void) strcpy(suffix, strrchr(zc.zc_value, '/')); | |
2512 | if (guid_to_name(hdl, tosnap, parent_snapguid, | |
2513 | zc.zc_value) == 0) { | |
2514 | *strchr(zc.zc_value, '@') = '\0'; | |
2515 | (void) strcat(zc.zc_value, suffix); | |
2516 | } | |
2517 | } | |
2518 | } else { | |
2519 | /* | |
2520 | * if the fs does not exist, look for it based on the | |
2521 | * fromsnap GUID | |
2522 | */ | |
2523 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
2524 | "cannot receive incremental stream")); | |
2525 | ||
2526 | (void) strcpy(zc.zc_name, zc.zc_value); | |
2527 | *strchr(zc.zc_name, '@') = '\0'; | |
2528 | ||
428870ff BB |
2529 | /* |
2530 | * If the exact receive path was specified and this is the | |
2531 | * topmost path in the stream, then if the fs does not exist we | |
2532 | * should look no further. | |
2533 | */ | |
2534 | if ((flags.isprefix || (*(chopprefix = drrb->drr_toname + | |
2535 | strlen(sendfs)) != '\0' && *chopprefix != '@')) && | |
2536 | !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
34dc7c2f BB |
2537 | char snap[ZFS_MAXNAMELEN]; |
2538 | (void) strcpy(snap, strchr(zc.zc_value, '@')); | |
2539 | if (guid_to_name(hdl, tosnap, drrb->drr_fromguid, | |
2540 | zc.zc_value) == 0) { | |
2541 | *strchr(zc.zc_value, '@') = '\0'; | |
2542 | (void) strcat(zc.zc_value, snap); | |
2543 | } | |
2544 | } | |
2545 | } | |
2546 | ||
2547 | (void) strcpy(zc.zc_name, zc.zc_value); | |
2548 | *strchr(zc.zc_name, '@') = '\0'; | |
2549 | ||
2550 | if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
2551 | zfs_handle_t *zhp; | |
428870ff | 2552 | |
34dc7c2f BB |
2553 | /* |
2554 | * Destination fs exists. Therefore this should either | |
2555 | * be an incremental, or the stream specifies a new fs | |
2556 | * (full stream or clone) and they want us to blow it | |
2557 | * away (and have therefore specified -F and removed any | |
2558 | * snapshots). | |
2559 | */ | |
34dc7c2f BB |
2560 | if (stream_wantsnewfs) { |
2561 | if (!flags.force) { | |
2562 | zcmd_free_nvlists(&zc); | |
2563 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2564 | "destination '%s' exists\n" | |
2565 | "must specify -F to overwrite it"), | |
2566 | zc.zc_name); | |
2567 | return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
2568 | } | |
2569 | if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT, | |
2570 | &zc) == 0) { | |
2571 | zcmd_free_nvlists(&zc); | |
2572 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2573 | "destination has snapshots (eg. %s)\n" | |
2574 | "must destroy them to overwrite it"), | |
2575 | zc.zc_name); | |
2576 | return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
2577 | } | |
2578 | } | |
2579 | ||
2580 | if ((zhp = zfs_open(hdl, zc.zc_name, | |
2581 | ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) == NULL) { | |
2582 | zcmd_free_nvlists(&zc); | |
2583 | return (-1); | |
2584 | } | |
2585 | ||
2586 | if (stream_wantsnewfs && | |
2587 | zhp->zfs_dmustats.dds_origin[0]) { | |
2588 | zcmd_free_nvlists(&zc); | |
2589 | zfs_close(zhp); | |
2590 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2591 | "destination '%s' is a clone\n" | |
2592 | "must destroy it to overwrite it"), | |
2593 | zc.zc_name); | |
2594 | return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
2595 | } | |
2596 | ||
2597 | if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM && | |
2598 | stream_wantsnewfs) { | |
2599 | /* We can't do online recv in this case */ | |
b128c09f | 2600 | clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0); |
34dc7c2f | 2601 | if (clp == NULL) { |
45d1cae3 | 2602 | zfs_close(zhp); |
34dc7c2f BB |
2603 | zcmd_free_nvlists(&zc); |
2604 | return (-1); | |
2605 | } | |
2606 | if (changelist_prefix(clp) != 0) { | |
2607 | changelist_free(clp); | |
45d1cae3 | 2608 | zfs_close(zhp); |
34dc7c2f BB |
2609 | zcmd_free_nvlists(&zc); |
2610 | return (-1); | |
2611 | } | |
2612 | } | |
34dc7c2f BB |
2613 | zfs_close(zhp); |
2614 | } else { | |
2615 | /* | |
2616 | * Destination filesystem does not exist. Therefore we better | |
2617 | * be creating a new filesystem (either from a full backup, or | |
2618 | * a clone). It would therefore be invalid if the user | |
2619 | * specified only the pool name (i.e. if the destination name | |
2620 | * contained no slash character). | |
2621 | */ | |
2622 | if (!stream_wantsnewfs || | |
2623 | (cp = strrchr(zc.zc_name, '/')) == NULL) { | |
2624 | zcmd_free_nvlists(&zc); | |
2625 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2626 | "destination '%s' does not exist"), zc.zc_name); | |
2627 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
2628 | } | |
2629 | ||
2630 | /* | |
2631 | * Trim off the final dataset component so we perform the | |
2632 | * recvbackup ioctl to the filesystems's parent. | |
2633 | */ | |
2634 | *cp = '\0'; | |
2635 | ||
428870ff | 2636 | if (flags.isprefix && !flags.istail && !flags.dryrun && |
34dc7c2f BB |
2637 | create_parents(hdl, zc.zc_value, strlen(tosnap)) != 0) { |
2638 | zcmd_free_nvlists(&zc); | |
2639 | return (zfs_error(hdl, EZFS_BADRESTORE, errbuf)); | |
2640 | } | |
2641 | ||
2642 | newfs = B_TRUE; | |
2643 | } | |
2644 | ||
2645 | zc.zc_begin_record = drr_noswap->drr_u.drr_begin; | |
2646 | zc.zc_cookie = infd; | |
2647 | zc.zc_guid = flags.force; | |
2648 | if (flags.verbose) { | |
2649 | (void) printf("%s %s stream of %s into %s\n", | |
2650 | flags.dryrun ? "would receive" : "receiving", | |
2651 | drrb->drr_fromguid ? "incremental" : "full", | |
2652 | drrb->drr_toname, zc.zc_value); | |
2653 | (void) fflush(stdout); | |
2654 | } | |
2655 | ||
2656 | if (flags.dryrun) { | |
2657 | zcmd_free_nvlists(&zc); | |
2658 | return (recv_skip(hdl, infd, flags.byteswap)); | |
2659 | } | |
2660 | ||
428870ff BB |
2661 | zc.zc_nvlist_dst = (uint64_t)(uintptr_t)prop_errbuf; |
2662 | zc.zc_nvlist_dst_size = sizeof (prop_errbuf); | |
572e2857 BB |
2663 | zc.zc_cleanup_fd = cleanup_fd; |
2664 | zc.zc_action_handle = *action_handlep; | |
428870ff | 2665 | |
34dc7c2f BB |
2666 | err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc); |
2667 | ioctl_errno = errno; | |
428870ff BB |
2668 | prop_errflags = (zprop_errflags_t)zc.zc_obj; |
2669 | ||
2670 | if (err == 0) { | |
2671 | nvlist_t *prop_errors; | |
2672 | VERIFY(0 == nvlist_unpack((void *)(uintptr_t)zc.zc_nvlist_dst, | |
2673 | zc.zc_nvlist_dst_size, &prop_errors, 0)); | |
2674 | ||
2675 | nvpair_t *prop_err = NULL; | |
2676 | ||
2677 | while ((prop_err = nvlist_next_nvpair(prop_errors, | |
2678 | prop_err)) != NULL) { | |
2679 | char tbuf[1024]; | |
2680 | zfs_prop_t prop; | |
2681 | int intval; | |
2682 | ||
2683 | prop = zfs_name_to_prop(nvpair_name(prop_err)); | |
2684 | (void) nvpair_value_int32(prop_err, &intval); | |
2685 | if (strcmp(nvpair_name(prop_err), | |
2686 | ZPROP_N_MORE_ERRORS) == 0) { | |
2687 | trunc_prop_errs(intval); | |
2688 | break; | |
2689 | } else { | |
2690 | (void) snprintf(tbuf, sizeof (tbuf), | |
2691 | dgettext(TEXT_DOMAIN, | |
2692 | "cannot receive %s property on %s"), | |
2693 | nvpair_name(prop_err), zc.zc_name); | |
2694 | zfs_setprop_error(hdl, prop, intval, tbuf); | |
2695 | } | |
2696 | } | |
2697 | nvlist_free(prop_errors); | |
2698 | } | |
2699 | ||
2700 | zc.zc_nvlist_dst = 0; | |
2701 | zc.zc_nvlist_dst_size = 0; | |
b128c09f BB |
2702 | zcmd_free_nvlists(&zc); |
2703 | ||
2704 | if (err == 0 && snapprops_nvlist) { | |
2705 | zfs_cmd_t zc2 = { 0 }; | |
2706 | ||
2707 | (void) strcpy(zc2.zc_name, zc.zc_value); | |
428870ff | 2708 | zc2.zc_cookie = B_TRUE; /* received */ |
b128c09f BB |
2709 | if (zcmd_write_src_nvlist(hdl, &zc2, snapprops_nvlist) == 0) { |
2710 | (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc2); | |
2711 | zcmd_free_nvlists(&zc2); | |
2712 | } | |
2713 | } | |
2714 | ||
428870ff | 2715 | if (err && (ioctl_errno == ENOENT || ioctl_errno == EEXIST)) { |
34dc7c2f BB |
2716 | /* |
2717 | * It may be that this snapshot already exists, | |
2718 | * in which case we want to consume & ignore it | |
2719 | * rather than failing. | |
2720 | */ | |
2721 | avl_tree_t *local_avl; | |
2722 | nvlist_t *local_nv, *fs; | |
428870ff | 2723 | cp = strchr(zc.zc_value, '@'); |
34dc7c2f BB |
2724 | |
2725 | /* | |
2726 | * XXX Do this faster by just iterating over snaps in | |
2727 | * this fs. Also if zc_value does not exist, we will | |
2728 | * get a strange "does not exist" error message. | |
2729 | */ | |
2730 | *cp = '\0'; | |
428870ff | 2731 | if (gather_nvlist(hdl, zc.zc_value, NULL, NULL, B_FALSE, |
34dc7c2f BB |
2732 | &local_nv, &local_avl) == 0) { |
2733 | *cp = '@'; | |
2734 | fs = fsavl_find(local_avl, drrb->drr_toguid, NULL); | |
2735 | fsavl_destroy(local_avl); | |
2736 | nvlist_free(local_nv); | |
2737 | ||
2738 | if (fs != NULL) { | |
2739 | if (flags.verbose) { | |
2740 | (void) printf("snap %s already exists; " | |
2741 | "ignoring\n", zc.zc_value); | |
2742 | } | |
428870ff | 2743 | err = ioctl_err = recv_skip(hdl, infd, |
34dc7c2f BB |
2744 | flags.byteswap); |
2745 | } | |
2746 | } | |
2747 | *cp = '@'; | |
2748 | } | |
2749 | ||
34dc7c2f BB |
2750 | if (ioctl_err != 0) { |
2751 | switch (ioctl_errno) { | |
2752 | case ENODEV: | |
2753 | cp = strchr(zc.zc_value, '@'); | |
2754 | *cp = '\0'; | |
2755 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2756 | "most recent snapshot of %s does not\n" | |
2757 | "match incremental source"), zc.zc_value); | |
2758 | (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
2759 | *cp = '@'; | |
2760 | break; | |
2761 | case ETXTBSY: | |
2762 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2763 | "destination %s has been modified\n" | |
2764 | "since most recent snapshot"), zc.zc_name); | |
2765 | (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
2766 | break; | |
2767 | case EEXIST: | |
2768 | cp = strchr(zc.zc_value, '@'); | |
2769 | if (newfs) { | |
2770 | /* it's the containing fs that exists */ | |
2771 | *cp = '\0'; | |
2772 | } | |
2773 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2774 | "destination already exists")); | |
2775 | (void) zfs_error_fmt(hdl, EZFS_EXISTS, | |
2776 | dgettext(TEXT_DOMAIN, "cannot restore to %s"), | |
2777 | zc.zc_value); | |
2778 | *cp = '@'; | |
2779 | break; | |
2780 | case EINVAL: | |
2781 | (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
2782 | break; | |
2783 | case ECKSUM: | |
2784 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2785 | "invalid stream (checksum mismatch)")); | |
2786 | (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
2787 | break; | |
428870ff BB |
2788 | case ENOTSUP: |
2789 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2790 | "pool must be upgraded to receive this stream.")); | |
2791 | (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); | |
2792 | break; | |
2793 | case EDQUOT: | |
2794 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2795 | "destination %s space quota exceeded"), zc.zc_name); | |
2796 | (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
2797 | break; | |
34dc7c2f BB |
2798 | default: |
2799 | (void) zfs_standard_error(hdl, ioctl_errno, errbuf); | |
2800 | } | |
2801 | } | |
2802 | ||
2803 | /* | |
428870ff BB |
2804 | * Mount the target filesystem (if created). Also mount any |
2805 | * children of the target filesystem if we did a replication | |
2806 | * receive (indicated by stream_avl being non-NULL). | |
34dc7c2f BB |
2807 | */ |
2808 | cp = strchr(zc.zc_value, '@'); | |
2809 | if (cp && (ioctl_err == 0 || !newfs)) { | |
2810 | zfs_handle_t *h; | |
2811 | ||
2812 | *cp = '\0'; | |
2813 | h = zfs_open(hdl, zc.zc_value, | |
2814 | ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); | |
34dc7c2f BB |
2815 | if (h != NULL) { |
2816 | if (h->zfs_type == ZFS_TYPE_VOLUME) { | |
b128c09f | 2817 | *cp = '@'; |
45d1cae3 | 2818 | } else if (newfs || stream_avl) { |
b128c09f BB |
2819 | /* |
2820 | * Track the first/top of hierarchy fs, | |
2821 | * for mounting and sharing later. | |
2822 | */ | |
2823 | if (top_zfs && *top_zfs == NULL) | |
2824 | *top_zfs = zfs_strdup(hdl, zc.zc_value); | |
34dc7c2f BB |
2825 | } |
2826 | zfs_close(h); | |
2827 | } | |
b128c09f | 2828 | *cp = '@'; |
34dc7c2f BB |
2829 | } |
2830 | ||
2831 | if (clp) { | |
2832 | err |= changelist_postfix(clp); | |
2833 | changelist_free(clp); | |
2834 | } | |
2835 | ||
428870ff BB |
2836 | if (prop_errflags & ZPROP_ERR_NOCLEAR) { |
2837 | (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: " | |
2838 | "failed to clear unreceived properties on %s"), | |
2839 | zc.zc_name); | |
2840 | (void) fprintf(stderr, "\n"); | |
2841 | } | |
2842 | if (prop_errflags & ZPROP_ERR_NORESTORE) { | |
2843 | (void) fprintf(stderr, dgettext(TEXT_DOMAIN, "Warning: " | |
2844 | "failed to restore original properties on %s"), | |
2845 | zc.zc_name); | |
2846 | (void) fprintf(stderr, "\n"); | |
2847 | } | |
2848 | ||
34dc7c2f BB |
2849 | if (err || ioctl_err) |
2850 | return (-1); | |
2851 | ||
572e2857 BB |
2852 | *action_handlep = zc.zc_action_handle; |
2853 | ||
34dc7c2f BB |
2854 | if (flags.verbose) { |
2855 | char buf1[64]; | |
2856 | char buf2[64]; | |
2857 | uint64_t bytes = zc.zc_cookie; | |
2858 | time_t delta = time(NULL) - begin_time; | |
2859 | if (delta == 0) | |
2860 | delta = 1; | |
2861 | zfs_nicenum(bytes, buf1, sizeof (buf1)); | |
2862 | zfs_nicenum(bytes/delta, buf2, sizeof (buf1)); | |
2863 | ||
2864 | (void) printf("received %sB stream in %lu seconds (%sB/sec)\n", | |
2865 | buf1, delta, buf2); | |
2866 | } | |
2867 | ||
2868 | return (0); | |
2869 | } | |
2870 | ||
b128c09f BB |
2871 | static int |
2872 | zfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags, | |
428870ff | 2873 | int infd, const char *sendfs, nvlist_t *stream_nv, avl_tree_t *stream_avl, |
572e2857 | 2874 | char **top_zfs, int cleanup_fd, uint64_t *action_handlep) |
34dc7c2f BB |
2875 | { |
2876 | int err; | |
2877 | dmu_replay_record_t drr, drr_noswap; | |
2878 | struct drr_begin *drrb = &drr.drr_u.drr_begin; | |
2879 | char errbuf[1024]; | |
2880 | zio_cksum_t zcksum = { 0 }; | |
428870ff BB |
2881 | uint64_t featureflags; |
2882 | int hdrtype; | |
34dc7c2f BB |
2883 | |
2884 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
2885 | "cannot receive")); | |
2886 | ||
2887 | if (flags.isprefix && | |
2888 | !zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) { | |
2889 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs " | |
2890 | "(%s) does not exist"), tosnap); | |
2891 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
2892 | } | |
2893 | ||
2894 | /* read in the BEGIN record */ | |
2895 | if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE, | |
2896 | &zcksum))) | |
2897 | return (err); | |
2898 | ||
2899 | if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) { | |
2900 | /* It's the double end record at the end of a package */ | |
2901 | return (ENODATA); | |
2902 | } | |
2903 | ||
2904 | /* the kernel needs the non-byteswapped begin record */ | |
2905 | drr_noswap = drr; | |
2906 | ||
2907 | flags.byteswap = B_FALSE; | |
2908 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { | |
2909 | /* | |
2910 | * We computed the checksum in the wrong byteorder in | |
2911 | * recv_read() above; do it again correctly. | |
2912 | */ | |
2913 | bzero(&zcksum, sizeof (zio_cksum_t)); | |
2914 | fletcher_4_incremental_byteswap(&drr, sizeof (drr), &zcksum); | |
2915 | flags.byteswap = B_TRUE; | |
2916 | ||
2917 | drr.drr_type = BSWAP_32(drr.drr_type); | |
2918 | drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen); | |
2919 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
428870ff | 2920 | drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo); |
34dc7c2f BB |
2921 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); |
2922 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
2923 | drrb->drr_flags = BSWAP_32(drrb->drr_flags); | |
2924 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
2925 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
2926 | } | |
2927 | ||
2928 | if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) { | |
2929 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
2930 | "stream (bad magic number)")); | |
2931 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2932 | } | |
2933 | ||
428870ff BB |
2934 | featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo); |
2935 | hdrtype = DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo); | |
2936 | ||
2937 | if (!DMU_STREAM_SUPPORTED(featureflags) || | |
2938 | (hdrtype != DMU_SUBSTREAM && hdrtype != DMU_COMPOUNDSTREAM)) { | |
2939 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2940 | "stream has unsupported feature, feature flags = %lx"), | |
2941 | featureflags); | |
2942 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2943 | } | |
2944 | ||
34dc7c2f BB |
2945 | if (strchr(drrb->drr_toname, '@') == NULL) { |
2946 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
2947 | "stream (bad snapshot name)")); | |
2948 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2949 | } | |
2950 | ||
428870ff BB |
2951 | if (DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == DMU_SUBSTREAM) { |
2952 | char nonpackage_sendfs[ZFS_MAXNAMELEN]; | |
2953 | if (sendfs == NULL) { | |
2954 | /* | |
2955 | * We were not called from zfs_receive_package(). Get | |
2956 | * the fs specified by 'zfs send'. | |
2957 | */ | |
2958 | char *cp; | |
2959 | (void) strlcpy(nonpackage_sendfs, | |
2960 | drr.drr_u.drr_begin.drr_toname, ZFS_MAXNAMELEN); | |
2961 | if ((cp = strchr(nonpackage_sendfs, '@')) != NULL) | |
2962 | *cp = '\0'; | |
2963 | sendfs = nonpackage_sendfs; | |
2964 | } | |
34dc7c2f | 2965 | return (zfs_receive_one(hdl, infd, tosnap, flags, |
428870ff | 2966 | &drr, &drr_noswap, sendfs, stream_nv, stream_avl, |
572e2857 | 2967 | top_zfs, cleanup_fd, action_handlep)); |
428870ff BB |
2968 | } else { |
2969 | assert(DMU_GET_STREAM_HDRTYPE(drrb->drr_versioninfo) == | |
2970 | DMU_COMPOUNDSTREAM); | |
34dc7c2f | 2971 | return (zfs_receive_package(hdl, infd, tosnap, flags, |
572e2857 | 2972 | &drr, &zcksum, top_zfs, cleanup_fd, action_handlep)); |
34dc7c2f BB |
2973 | } |
2974 | } | |
b128c09f BB |
2975 | |
2976 | /* | |
2977 | * Restores a backup of tosnap from the file descriptor specified by infd. | |
2978 | * Return 0 on total success, -2 if some things couldn't be | |
2979 | * destroyed/renamed/promoted, -1 if some things couldn't be received. | |
2980 | * (-1 will override -2). | |
2981 | */ | |
2982 | int | |
2983 | zfs_receive(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags, | |
2984 | int infd, avl_tree_t *stream_avl) | |
2985 | { | |
2986 | char *top_zfs = NULL; | |
2987 | int err; | |
572e2857 BB |
2988 | int cleanup_fd; |
2989 | uint64_t action_handle = 0; | |
2990 | ||
2991 | cleanup_fd = open(ZFS_DEV, O_RDWR|O_EXCL); | |
2992 | VERIFY(cleanup_fd >= 0); | |
b128c09f | 2993 | |
428870ff | 2994 | err = zfs_receive_impl(hdl, tosnap, flags, infd, NULL, NULL, |
572e2857 BB |
2995 | stream_avl, &top_zfs, cleanup_fd, &action_handle); |
2996 | ||
2997 | VERIFY(0 == close(cleanup_fd)); | |
b128c09f | 2998 | |
d164b209 | 2999 | if (err == 0 && !flags.nomount && top_zfs) { |
b128c09f BB |
3000 | zfs_handle_t *zhp; |
3001 | prop_changelist_t *clp; | |
3002 | ||
3003 | zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM); | |
3004 | if (zhp != NULL) { | |
3005 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, | |
3006 | CL_GATHER_MOUNT_ALWAYS, 0); | |
3007 | zfs_close(zhp); | |
3008 | if (clp != NULL) { | |
3009 | /* mount and share received datasets */ | |
3010 | err = changelist_postfix(clp); | |
3011 | changelist_free(clp); | |
3012 | } | |
3013 | } | |
3014 | if (zhp == NULL || clp == NULL || err) | |
3015 | err = -1; | |
3016 | } | |
3017 | if (top_zfs) | |
3018 | free(top_zfs); | |
3019 | ||
3020 | return (err); | |
3021 | } |