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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 | /* | |
23 | * Copyright 2008 Sun Microsystems, Inc. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | */ | |
26 | ||
34dc7c2f BB |
27 | #include <assert.h> |
28 | #include <ctype.h> | |
29 | #include <errno.h> | |
30 | #include <libdevinfo.h> | |
31 | #include <libintl.h> | |
32 | #include <stdio.h> | |
33 | #include <stdlib.h> | |
34 | #include <strings.h> | |
35 | #include <unistd.h> | |
36 | #include <stddef.h> | |
37 | #include <fcntl.h> | |
38 | #include <sys/mount.h> | |
39 | #include <sys/mntent.h> | |
40 | #include <sys/mnttab.h> | |
41 | #include <sys/avl.h> | |
42 | #include <stddef.h> | |
43 | ||
44 | #include <libzfs.h> | |
45 | ||
46 | #include "zfs_namecheck.h" | |
47 | #include "zfs_prop.h" | |
48 | #include "libzfs_impl.h" | |
49 | ||
50 | #include <fletcher.c> /* XXX */ | |
51 | ||
b128c09f BB |
52 | static int zfs_receive_impl(libzfs_handle_t *, const char *, recvflags_t, |
53 | int, avl_tree_t *, char **); | |
54 | ||
34dc7c2f BB |
55 | /* |
56 | * Routines for dealing with the AVL tree of fs-nvlists | |
57 | */ | |
58 | typedef struct fsavl_node { | |
59 | avl_node_t fn_node; | |
60 | nvlist_t *fn_nvfs; | |
61 | char *fn_snapname; | |
62 | uint64_t fn_guid; | |
63 | } fsavl_node_t; | |
64 | ||
65 | static int | |
66 | fsavl_compare(const void *arg1, const void *arg2) | |
67 | { | |
68 | const fsavl_node_t *fn1 = arg1; | |
69 | const fsavl_node_t *fn2 = arg2; | |
70 | ||
71 | if (fn1->fn_guid > fn2->fn_guid) | |
72 | return (+1); | |
73 | else if (fn1->fn_guid < fn2->fn_guid) | |
74 | return (-1); | |
75 | else | |
76 | return (0); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Given the GUID of a snapshot, find its containing filesystem and | |
81 | * (optionally) name. | |
82 | */ | |
83 | static nvlist_t * | |
84 | fsavl_find(avl_tree_t *avl, uint64_t snapguid, char **snapname) | |
85 | { | |
86 | fsavl_node_t fn_find; | |
87 | fsavl_node_t *fn; | |
88 | ||
89 | fn_find.fn_guid = snapguid; | |
90 | ||
91 | fn = avl_find(avl, &fn_find, NULL); | |
92 | if (fn) { | |
93 | if (snapname) | |
94 | *snapname = fn->fn_snapname; | |
95 | return (fn->fn_nvfs); | |
96 | } | |
97 | return (NULL); | |
98 | } | |
99 | ||
100 | static void | |
101 | fsavl_destroy(avl_tree_t *avl) | |
102 | { | |
103 | fsavl_node_t *fn; | |
104 | void *cookie; | |
105 | ||
106 | if (avl == NULL) | |
107 | return; | |
108 | ||
109 | cookie = NULL; | |
110 | while ((fn = avl_destroy_nodes(avl, &cookie)) != NULL) | |
111 | free(fn); | |
112 | avl_destroy(avl); | |
113 | free(avl); | |
114 | } | |
115 | ||
116 | static avl_tree_t * | |
117 | fsavl_create(nvlist_t *fss) | |
118 | { | |
119 | avl_tree_t *fsavl; | |
120 | nvpair_t *fselem = NULL; | |
121 | ||
122 | if ((fsavl = malloc(sizeof (avl_tree_t))) == NULL) | |
123 | return (NULL); | |
124 | ||
125 | avl_create(fsavl, fsavl_compare, sizeof (fsavl_node_t), | |
126 | offsetof(fsavl_node_t, fn_node)); | |
127 | ||
128 | while ((fselem = nvlist_next_nvpair(fss, fselem)) != NULL) { | |
129 | nvlist_t *nvfs, *snaps; | |
130 | nvpair_t *snapelem = NULL; | |
131 | ||
132 | VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); | |
133 | VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); | |
134 | ||
135 | while ((snapelem = | |
136 | nvlist_next_nvpair(snaps, snapelem)) != NULL) { | |
137 | fsavl_node_t *fn; | |
138 | uint64_t guid; | |
139 | ||
140 | VERIFY(0 == nvpair_value_uint64(snapelem, &guid)); | |
141 | if ((fn = malloc(sizeof (fsavl_node_t))) == NULL) { | |
142 | fsavl_destroy(fsavl); | |
143 | return (NULL); | |
144 | } | |
145 | fn->fn_nvfs = nvfs; | |
146 | fn->fn_snapname = nvpair_name(snapelem); | |
147 | fn->fn_guid = guid; | |
148 | ||
149 | /* | |
150 | * Note: if there are multiple snaps with the | |
151 | * same GUID, we ignore all but one. | |
152 | */ | |
153 | if (avl_find(fsavl, fn, NULL) == NULL) | |
154 | avl_add(fsavl, fn); | |
155 | else | |
156 | free(fn); | |
157 | } | |
158 | } | |
159 | ||
160 | return (fsavl); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Routines for dealing with the giant nvlist of fs-nvlists, etc. | |
165 | */ | |
166 | typedef struct send_data { | |
167 | uint64_t parent_fromsnap_guid; | |
168 | nvlist_t *parent_snaps; | |
169 | nvlist_t *fss; | |
b128c09f | 170 | nvlist_t *snapprops; |
34dc7c2f BB |
171 | const char *fromsnap; |
172 | const char *tosnap; | |
173 | ||
174 | /* | |
175 | * The header nvlist is of the following format: | |
176 | * { | |
177 | * "tosnap" -> string | |
178 | * "fromsnap" -> string (if incremental) | |
179 | * "fss" -> { | |
180 | * id -> { | |
181 | * | |
182 | * "name" -> string (full name; for debugging) | |
183 | * "parentfromsnap" -> number (guid of fromsnap in parent) | |
184 | * | |
185 | * "props" -> { name -> value (only if set here) } | |
186 | * "snaps" -> { name (lastname) -> number (guid) } | |
b128c09f | 187 | * "snapprops" -> { name (lastname) -> { name -> value } } |
34dc7c2f BB |
188 | * |
189 | * "origin" -> number (guid) (if clone) | |
190 | * "sent" -> boolean (not on-disk) | |
191 | * } | |
192 | * } | |
193 | * } | |
194 | * | |
195 | */ | |
196 | } send_data_t; | |
197 | ||
b128c09f BB |
198 | static void send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv); |
199 | ||
34dc7c2f BB |
200 | static int |
201 | send_iterate_snap(zfs_handle_t *zhp, void *arg) | |
202 | { | |
203 | send_data_t *sd = arg; | |
204 | uint64_t guid = zhp->zfs_dmustats.dds_guid; | |
205 | char *snapname; | |
b128c09f | 206 | nvlist_t *nv; |
34dc7c2f BB |
207 | |
208 | snapname = strrchr(zhp->zfs_name, '@')+1; | |
209 | ||
210 | VERIFY(0 == nvlist_add_uint64(sd->parent_snaps, snapname, guid)); | |
211 | /* | |
212 | * NB: if there is no fromsnap here (it's a newly created fs in | |
213 | * an incremental replication), we will substitute the tosnap. | |
214 | */ | |
215 | if ((sd->fromsnap && strcmp(snapname, sd->fromsnap) == 0) || | |
216 | (sd->parent_fromsnap_guid == 0 && sd->tosnap && | |
217 | strcmp(snapname, sd->tosnap) == 0)) { | |
218 | sd->parent_fromsnap_guid = guid; | |
219 | } | |
220 | ||
b128c09f BB |
221 | VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); |
222 | send_iterate_prop(zhp, nv); | |
223 | VERIFY(0 == nvlist_add_nvlist(sd->snapprops, snapname, nv)); | |
224 | nvlist_free(nv); | |
225 | ||
34dc7c2f BB |
226 | zfs_close(zhp); |
227 | return (0); | |
228 | } | |
229 | ||
230 | static void | |
231 | send_iterate_prop(zfs_handle_t *zhp, nvlist_t *nv) | |
232 | { | |
233 | nvpair_t *elem = NULL; | |
234 | ||
235 | while ((elem = nvlist_next_nvpair(zhp->zfs_props, elem)) != NULL) { | |
236 | char *propname = nvpair_name(elem); | |
237 | zfs_prop_t prop = zfs_name_to_prop(propname); | |
238 | nvlist_t *propnv; | |
239 | ||
240 | if (!zfs_prop_user(propname) && zfs_prop_readonly(prop)) | |
241 | continue; | |
242 | ||
243 | verify(nvpair_value_nvlist(elem, &propnv) == 0); | |
244 | if (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_RESERVATION) { | |
245 | /* these guys are modifyable, but have no source */ | |
246 | uint64_t value; | |
247 | verify(nvlist_lookup_uint64(propnv, | |
248 | ZPROP_VALUE, &value) == 0); | |
b128c09f BB |
249 | if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) |
250 | continue; | |
34dc7c2f BB |
251 | } else { |
252 | char *source; | |
253 | if (nvlist_lookup_string(propnv, | |
254 | ZPROP_SOURCE, &source) != 0) | |
255 | continue; | |
256 | if (strcmp(source, zhp->zfs_name) != 0) | |
257 | continue; | |
258 | } | |
259 | ||
260 | if (zfs_prop_user(propname) || | |
261 | zfs_prop_get_type(prop) == PROP_TYPE_STRING) { | |
262 | char *value; | |
263 | verify(nvlist_lookup_string(propnv, | |
264 | ZPROP_VALUE, &value) == 0); | |
265 | VERIFY(0 == nvlist_add_string(nv, propname, value)); | |
266 | } else { | |
267 | uint64_t value; | |
268 | verify(nvlist_lookup_uint64(propnv, | |
269 | ZPROP_VALUE, &value) == 0); | |
270 | VERIFY(0 == nvlist_add_uint64(nv, propname, value)); | |
271 | } | |
272 | } | |
273 | } | |
274 | ||
275 | static int | |
276 | send_iterate_fs(zfs_handle_t *zhp, void *arg) | |
277 | { | |
278 | send_data_t *sd = arg; | |
279 | nvlist_t *nvfs, *nv; | |
280 | int rv; | |
281 | uint64_t parent_fromsnap_guid_save = sd->parent_fromsnap_guid; | |
282 | uint64_t guid = zhp->zfs_dmustats.dds_guid; | |
283 | char guidstring[64]; | |
284 | ||
285 | VERIFY(0 == nvlist_alloc(&nvfs, NV_UNIQUE_NAME, 0)); | |
286 | VERIFY(0 == nvlist_add_string(nvfs, "name", zhp->zfs_name)); | |
287 | VERIFY(0 == nvlist_add_uint64(nvfs, "parentfromsnap", | |
288 | sd->parent_fromsnap_guid)); | |
289 | ||
290 | if (zhp->zfs_dmustats.dds_origin[0]) { | |
291 | zfs_handle_t *origin = zfs_open(zhp->zfs_hdl, | |
292 | zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT); | |
293 | if (origin == NULL) | |
294 | return (-1); | |
295 | VERIFY(0 == nvlist_add_uint64(nvfs, "origin", | |
296 | origin->zfs_dmustats.dds_guid)); | |
297 | } | |
298 | ||
299 | /* iterate over props */ | |
300 | VERIFY(0 == nvlist_alloc(&nv, NV_UNIQUE_NAME, 0)); | |
301 | send_iterate_prop(zhp, nv); | |
302 | VERIFY(0 == nvlist_add_nvlist(nvfs, "props", nv)); | |
303 | nvlist_free(nv); | |
304 | ||
305 | /* iterate over snaps, and set sd->parent_fromsnap_guid */ | |
306 | sd->parent_fromsnap_guid = 0; | |
307 | VERIFY(0 == nvlist_alloc(&sd->parent_snaps, NV_UNIQUE_NAME, 0)); | |
b128c09f | 308 | VERIFY(0 == nvlist_alloc(&sd->snapprops, NV_UNIQUE_NAME, 0)); |
34dc7c2f BB |
309 | (void) zfs_iter_snapshots(zhp, send_iterate_snap, sd); |
310 | VERIFY(0 == nvlist_add_nvlist(nvfs, "snaps", sd->parent_snaps)); | |
b128c09f | 311 | VERIFY(0 == nvlist_add_nvlist(nvfs, "snapprops", sd->snapprops)); |
34dc7c2f | 312 | nvlist_free(sd->parent_snaps); |
b128c09f | 313 | nvlist_free(sd->snapprops); |
34dc7c2f BB |
314 | |
315 | /* add this fs to nvlist */ | |
316 | (void) snprintf(guidstring, sizeof (guidstring), | |
317 | "0x%llx", (longlong_t)guid); | |
318 | VERIFY(0 == nvlist_add_nvlist(sd->fss, guidstring, nvfs)); | |
319 | nvlist_free(nvfs); | |
320 | ||
321 | /* iterate over children */ | |
322 | rv = zfs_iter_filesystems(zhp, send_iterate_fs, sd); | |
323 | ||
324 | sd->parent_fromsnap_guid = parent_fromsnap_guid_save; | |
325 | ||
326 | zfs_close(zhp); | |
327 | return (rv); | |
328 | } | |
329 | ||
330 | static int | |
331 | gather_nvlist(libzfs_handle_t *hdl, const char *fsname, const char *fromsnap, | |
332 | const char *tosnap, nvlist_t **nvlp, avl_tree_t **avlp) | |
333 | { | |
334 | zfs_handle_t *zhp; | |
335 | send_data_t sd = { 0 }; | |
336 | int error; | |
337 | ||
338 | zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); | |
339 | if (zhp == NULL) | |
340 | return (EZFS_BADTYPE); | |
341 | ||
342 | VERIFY(0 == nvlist_alloc(&sd.fss, NV_UNIQUE_NAME, 0)); | |
343 | sd.fromsnap = fromsnap; | |
344 | sd.tosnap = tosnap; | |
345 | ||
346 | if ((error = send_iterate_fs(zhp, &sd)) != 0) { | |
347 | nvlist_free(sd.fss); | |
348 | if (avlp != NULL) | |
349 | *avlp = NULL; | |
350 | *nvlp = NULL; | |
351 | return (error); | |
352 | } | |
353 | ||
354 | if (avlp != NULL && (*avlp = fsavl_create(sd.fss)) == NULL) { | |
355 | nvlist_free(sd.fss); | |
356 | *nvlp = NULL; | |
357 | return (EZFS_NOMEM); | |
358 | } | |
359 | ||
360 | *nvlp = sd.fss; | |
361 | return (0); | |
362 | } | |
363 | ||
364 | /* | |
365 | * Routines for dealing with the sorted snapshot functionality | |
366 | */ | |
367 | typedef struct zfs_node { | |
368 | zfs_handle_t *zn_handle; | |
369 | avl_node_t zn_avlnode; | |
370 | } zfs_node_t; | |
371 | ||
372 | static int | |
373 | zfs_sort_snaps(zfs_handle_t *zhp, void *data) | |
374 | { | |
375 | avl_tree_t *avl = data; | |
376 | zfs_node_t *node = zfs_alloc(zhp->zfs_hdl, sizeof (zfs_node_t)); | |
377 | ||
378 | node->zn_handle = zhp; | |
379 | avl_add(avl, node); | |
380 | return (0); | |
381 | } | |
382 | ||
383 | /* ARGSUSED */ | |
384 | static int | |
385 | zfs_snapshot_compare(const void *larg, const void *rarg) | |
386 | { | |
387 | zfs_handle_t *l = ((zfs_node_t *)larg)->zn_handle; | |
388 | zfs_handle_t *r = ((zfs_node_t *)rarg)->zn_handle; | |
389 | uint64_t lcreate, rcreate; | |
390 | ||
391 | /* | |
392 | * Sort them according to creation time. We use the hidden | |
393 | * CREATETXG property to get an absolute ordering of snapshots. | |
394 | */ | |
395 | lcreate = zfs_prop_get_int(l, ZFS_PROP_CREATETXG); | |
396 | rcreate = zfs_prop_get_int(r, ZFS_PROP_CREATETXG); | |
397 | ||
398 | if (lcreate < rcreate) | |
399 | return (-1); | |
400 | else if (lcreate > rcreate) | |
401 | return (+1); | |
402 | else | |
403 | return (0); | |
404 | } | |
405 | ||
406 | static int | |
407 | zfs_iter_snapshots_sorted(zfs_handle_t *zhp, zfs_iter_f callback, void *data) | |
408 | { | |
409 | int ret = 0; | |
410 | zfs_node_t *node; | |
411 | avl_tree_t avl; | |
412 | void *cookie = NULL; | |
413 | ||
414 | avl_create(&avl, zfs_snapshot_compare, | |
415 | sizeof (zfs_node_t), offsetof(zfs_node_t, zn_avlnode)); | |
416 | ||
417 | ret = zfs_iter_snapshots(zhp, zfs_sort_snaps, &avl); | |
418 | ||
419 | for (node = avl_first(&avl); node != NULL; node = AVL_NEXT(&avl, node)) | |
420 | ret |= callback(node->zn_handle, data); | |
421 | ||
422 | while ((node = avl_destroy_nodes(&avl, &cookie)) != NULL) | |
423 | free(node); | |
424 | ||
425 | avl_destroy(&avl); | |
426 | ||
427 | return (ret); | |
428 | } | |
429 | ||
430 | /* | |
431 | * Routines specific to "zfs send" | |
432 | */ | |
433 | typedef struct send_dump_data { | |
434 | /* these are all just the short snapname (the part after the @) */ | |
435 | const char *fromsnap; | |
436 | const char *tosnap; | |
437 | char lastsnap[ZFS_MAXNAMELEN]; | |
438 | boolean_t seenfrom, seento, replicate, doall, fromorigin; | |
439 | boolean_t verbose; | |
440 | int outfd; | |
441 | boolean_t err; | |
442 | nvlist_t *fss; | |
443 | avl_tree_t *fsavl; | |
444 | } send_dump_data_t; | |
445 | ||
446 | /* | |
447 | * Dumps a backup of the given snapshot (incremental from fromsnap if it's not | |
448 | * NULL) to the file descriptor specified by outfd. | |
449 | */ | |
450 | static int | |
451 | dump_ioctl(zfs_handle_t *zhp, const char *fromsnap, boolean_t fromorigin, | |
452 | int outfd) | |
453 | { | |
454 | zfs_cmd_t zc = { 0 }; | |
455 | libzfs_handle_t *hdl = zhp->zfs_hdl; | |
456 | ||
457 | assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); | |
458 | assert(fromsnap == NULL || fromsnap[0] == '\0' || !fromorigin); | |
459 | ||
460 | (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); | |
461 | if (fromsnap) | |
462 | (void) strlcpy(zc.zc_value, fromsnap, sizeof (zc.zc_value)); | |
463 | zc.zc_cookie = outfd; | |
464 | zc.zc_obj = fromorigin; | |
465 | ||
466 | if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SEND, &zc) != 0) { | |
467 | char errbuf[1024]; | |
468 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
469 | "warning: cannot send '%s'"), zhp->zfs_name); | |
470 | ||
471 | switch (errno) { | |
472 | ||
473 | case EXDEV: | |
474 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
475 | "not an earlier snapshot from the same fs")); | |
476 | return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); | |
477 | ||
478 | case ENOENT: | |
479 | if (zfs_dataset_exists(hdl, zc.zc_name, | |
480 | ZFS_TYPE_SNAPSHOT)) { | |
481 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
482 | "incremental source (@%s) does not exist"), | |
483 | zc.zc_value); | |
484 | } | |
485 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
486 | ||
487 | case EDQUOT: | |
488 | case EFBIG: | |
489 | case EIO: | |
490 | case ENOLINK: | |
491 | case ENOSPC: | |
492 | case ENOSTR: | |
493 | case ENXIO: | |
494 | case EPIPE: | |
495 | case ERANGE: | |
496 | case EFAULT: | |
497 | case EROFS: | |
498 | zfs_error_aux(hdl, strerror(errno)); | |
499 | return (zfs_error(hdl, EZFS_BADBACKUP, errbuf)); | |
500 | ||
501 | default: | |
502 | return (zfs_standard_error(hdl, errno, errbuf)); | |
503 | } | |
504 | } | |
505 | ||
506 | return (0); | |
507 | } | |
508 | ||
509 | static int | |
510 | dump_snapshot(zfs_handle_t *zhp, void *arg) | |
511 | { | |
512 | send_dump_data_t *sdd = arg; | |
513 | const char *thissnap; | |
514 | int err; | |
515 | ||
516 | thissnap = strchr(zhp->zfs_name, '@') + 1; | |
517 | ||
518 | if (sdd->fromsnap && !sdd->seenfrom && | |
519 | strcmp(sdd->fromsnap, thissnap) == 0) { | |
520 | sdd->seenfrom = B_TRUE; | |
521 | (void) strcpy(sdd->lastsnap, thissnap); | |
522 | zfs_close(zhp); | |
523 | return (0); | |
524 | } | |
525 | ||
526 | if (sdd->seento || !sdd->seenfrom) { | |
527 | zfs_close(zhp); | |
528 | return (0); | |
529 | } | |
530 | ||
531 | /* send it */ | |
532 | if (sdd->verbose) { | |
533 | (void) fprintf(stderr, "sending from @%s to %s\n", | |
534 | sdd->lastsnap, zhp->zfs_name); | |
535 | } | |
536 | ||
537 | err = dump_ioctl(zhp, sdd->lastsnap, | |
538 | sdd->lastsnap[0] == '\0' && (sdd->fromorigin || sdd->replicate), | |
539 | sdd->outfd); | |
540 | ||
541 | if (!sdd->seento && strcmp(sdd->tosnap, thissnap) == 0) | |
542 | sdd->seento = B_TRUE; | |
543 | ||
544 | (void) strcpy(sdd->lastsnap, thissnap); | |
545 | zfs_close(zhp); | |
546 | return (err); | |
547 | } | |
548 | ||
549 | static int | |
550 | dump_filesystem(zfs_handle_t *zhp, void *arg) | |
551 | { | |
552 | int rv = 0; | |
553 | send_dump_data_t *sdd = arg; | |
554 | boolean_t missingfrom = B_FALSE; | |
555 | zfs_cmd_t zc = { 0 }; | |
556 | ||
557 | (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", | |
558 | zhp->zfs_name, sdd->tosnap); | |
559 | if (ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0) { | |
560 | (void) fprintf(stderr, "WARNING: " | |
561 | "could not send %s@%s: does not exist\n", | |
562 | zhp->zfs_name, sdd->tosnap); | |
563 | sdd->err = B_TRUE; | |
564 | return (0); | |
565 | } | |
566 | ||
567 | if (sdd->replicate && sdd->fromsnap) { | |
568 | /* | |
569 | * If this fs does not have fromsnap, and we're doing | |
570 | * recursive, we need to send a full stream from the | |
571 | * beginning (or an incremental from the origin if this | |
572 | * is a clone). If we're doing non-recursive, then let | |
573 | * them get the error. | |
574 | */ | |
575 | (void) snprintf(zc.zc_name, sizeof (zc.zc_name), "%s@%s", | |
576 | zhp->zfs_name, sdd->fromsnap); | |
577 | if (ioctl(zhp->zfs_hdl->libzfs_fd, | |
578 | ZFS_IOC_OBJSET_STATS, &zc) != 0) { | |
579 | missingfrom = B_TRUE; | |
580 | } | |
581 | } | |
582 | ||
583 | if (sdd->doall) { | |
584 | sdd->seenfrom = sdd->seento = sdd->lastsnap[0] = 0; | |
585 | if (sdd->fromsnap == NULL || missingfrom) | |
586 | sdd->seenfrom = B_TRUE; | |
587 | ||
588 | rv = zfs_iter_snapshots_sorted(zhp, dump_snapshot, arg); | |
589 | if (!sdd->seenfrom) { | |
590 | (void) fprintf(stderr, | |
591 | "WARNING: could not send %s@%s:\n" | |
592 | "incremental source (%s@%s) does not exist\n", | |
593 | zhp->zfs_name, sdd->tosnap, | |
594 | zhp->zfs_name, sdd->fromsnap); | |
595 | sdd->err = B_TRUE; | |
596 | } else if (!sdd->seento) { | |
597 | (void) fprintf(stderr, | |
598 | "WARNING: could not send %s@%s:\n" | |
599 | "incremental source (%s@%s) " | |
600 | "is not earlier than it\n", | |
601 | zhp->zfs_name, sdd->tosnap, | |
602 | zhp->zfs_name, sdd->fromsnap); | |
603 | sdd->err = B_TRUE; | |
604 | } | |
605 | } else { | |
606 | zfs_handle_t *snapzhp; | |
607 | char snapname[ZFS_MAXNAMELEN]; | |
608 | ||
609 | (void) snprintf(snapname, sizeof (snapname), "%s@%s", | |
610 | zfs_get_name(zhp), sdd->tosnap); | |
611 | snapzhp = zfs_open(zhp->zfs_hdl, snapname, ZFS_TYPE_SNAPSHOT); | |
612 | if (snapzhp == NULL) { | |
613 | rv = -1; | |
614 | } else { | |
615 | rv = dump_ioctl(snapzhp, | |
616 | missingfrom ? NULL : sdd->fromsnap, | |
617 | sdd->fromorigin || missingfrom, | |
618 | sdd->outfd); | |
619 | sdd->seento = B_TRUE; | |
620 | zfs_close(snapzhp); | |
621 | } | |
622 | } | |
623 | ||
624 | return (rv); | |
625 | } | |
626 | ||
627 | static int | |
628 | dump_filesystems(zfs_handle_t *rzhp, void *arg) | |
629 | { | |
630 | send_dump_data_t *sdd = arg; | |
631 | nvpair_t *fspair; | |
632 | boolean_t needagain, progress; | |
633 | ||
634 | if (!sdd->replicate) | |
635 | return (dump_filesystem(rzhp, sdd)); | |
636 | ||
637 | again: | |
638 | needagain = progress = B_FALSE; | |
639 | for (fspair = nvlist_next_nvpair(sdd->fss, NULL); fspair; | |
640 | fspair = nvlist_next_nvpair(sdd->fss, fspair)) { | |
641 | nvlist_t *fslist; | |
642 | char *fsname; | |
643 | zfs_handle_t *zhp; | |
644 | int err; | |
645 | uint64_t origin_guid = 0; | |
646 | nvlist_t *origin_nv; | |
647 | ||
648 | VERIFY(nvpair_value_nvlist(fspair, &fslist) == 0); | |
649 | if (nvlist_lookup_boolean(fslist, "sent") == 0) | |
650 | continue; | |
651 | ||
652 | VERIFY(nvlist_lookup_string(fslist, "name", &fsname) == 0); | |
653 | (void) nvlist_lookup_uint64(fslist, "origin", &origin_guid); | |
654 | ||
655 | origin_nv = fsavl_find(sdd->fsavl, origin_guid, NULL); | |
656 | if (origin_nv && | |
657 | nvlist_lookup_boolean(origin_nv, "sent") == ENOENT) { | |
658 | /* | |
659 | * origin has not been sent yet; | |
660 | * skip this clone. | |
661 | */ | |
662 | needagain = B_TRUE; | |
663 | continue; | |
664 | } | |
665 | ||
666 | zhp = zfs_open(rzhp->zfs_hdl, fsname, ZFS_TYPE_DATASET); | |
667 | if (zhp == NULL) | |
668 | return (-1); | |
669 | err = dump_filesystem(zhp, sdd); | |
670 | VERIFY(nvlist_add_boolean(fslist, "sent") == 0); | |
671 | progress = B_TRUE; | |
672 | zfs_close(zhp); | |
673 | if (err) | |
674 | return (err); | |
675 | } | |
676 | if (needagain) { | |
677 | assert(progress); | |
678 | goto again; | |
679 | } | |
680 | return (0); | |
681 | } | |
682 | ||
683 | /* | |
684 | * Dumps a backup of tosnap, incremental from fromsnap if it isn't NULL. | |
685 | * If 'doall', dump all intermediate snaps. | |
686 | * If 'replicate', dump special header and do recursively. | |
687 | */ | |
688 | int | |
689 | zfs_send(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap, | |
690 | boolean_t replicate, boolean_t doall, boolean_t fromorigin, | |
691 | boolean_t verbose, int outfd) | |
692 | { | |
693 | char errbuf[1024]; | |
694 | send_dump_data_t sdd = { 0 }; | |
695 | int err; | |
696 | nvlist_t *fss = NULL; | |
697 | avl_tree_t *fsavl = NULL; | |
698 | ||
699 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
700 | "cannot send '%s'"), zhp->zfs_name); | |
701 | ||
702 | if (fromsnap && fromsnap[0] == '\0') { | |
703 | zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, | |
704 | "zero-length incremental source")); | |
705 | return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); | |
706 | } | |
707 | ||
708 | if (replicate || doall) { | |
709 | dmu_replay_record_t drr = { 0 }; | |
710 | char *packbuf = NULL; | |
711 | size_t buflen = 0; | |
712 | zio_cksum_t zc = { 0 }; | |
713 | ||
714 | assert(fromsnap || doall); | |
715 | ||
716 | if (replicate) { | |
717 | nvlist_t *hdrnv; | |
718 | ||
719 | VERIFY(0 == nvlist_alloc(&hdrnv, NV_UNIQUE_NAME, 0)); | |
720 | if (fromsnap) { | |
721 | VERIFY(0 == nvlist_add_string(hdrnv, | |
722 | "fromsnap", fromsnap)); | |
723 | } | |
724 | VERIFY(0 == nvlist_add_string(hdrnv, "tosnap", tosnap)); | |
725 | ||
726 | err = gather_nvlist(zhp->zfs_hdl, zhp->zfs_name, | |
727 | fromsnap, tosnap, &fss, &fsavl); | |
728 | if (err) | |
729 | return (err); | |
730 | VERIFY(0 == nvlist_add_nvlist(hdrnv, "fss", fss)); | |
731 | err = nvlist_pack(hdrnv, &packbuf, &buflen, | |
732 | NV_ENCODE_XDR, 0); | |
733 | nvlist_free(hdrnv); | |
734 | if (err) { | |
735 | fsavl_destroy(fsavl); | |
736 | nvlist_free(fss); | |
737 | return (zfs_standard_error(zhp->zfs_hdl, | |
738 | err, errbuf)); | |
739 | } | |
740 | } | |
741 | ||
742 | /* write first begin record */ | |
743 | drr.drr_type = DRR_BEGIN; | |
744 | drr.drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; | |
745 | drr.drr_u.drr_begin.drr_version = DMU_BACKUP_HEADER_VERSION; | |
746 | (void) snprintf(drr.drr_u.drr_begin.drr_toname, | |
747 | sizeof (drr.drr_u.drr_begin.drr_toname), | |
748 | "%s@%s", zhp->zfs_name, tosnap); | |
749 | drr.drr_payloadlen = buflen; | |
750 | fletcher_4_incremental_native(&drr, sizeof (drr), &zc); | |
751 | err = write(outfd, &drr, sizeof (drr)); | |
752 | ||
753 | /* write header nvlist */ | |
754 | if (err != -1) { | |
755 | fletcher_4_incremental_native(packbuf, buflen, &zc); | |
756 | err = write(outfd, packbuf, buflen); | |
757 | } | |
758 | free(packbuf); | |
759 | if (err == -1) { | |
760 | fsavl_destroy(fsavl); | |
761 | nvlist_free(fss); | |
762 | return (zfs_standard_error(zhp->zfs_hdl, | |
763 | errno, errbuf)); | |
764 | } | |
765 | ||
766 | /* write end record */ | |
767 | if (err != -1) { | |
768 | bzero(&drr, sizeof (drr)); | |
769 | drr.drr_type = DRR_END; | |
770 | drr.drr_u.drr_end.drr_checksum = zc; | |
771 | err = write(outfd, &drr, sizeof (drr)); | |
772 | if (err == -1) { | |
773 | fsavl_destroy(fsavl); | |
774 | nvlist_free(fss); | |
775 | return (zfs_standard_error(zhp->zfs_hdl, | |
776 | errno, errbuf)); | |
777 | } | |
778 | } | |
779 | } | |
780 | ||
781 | /* dump each stream */ | |
782 | sdd.fromsnap = fromsnap; | |
783 | sdd.tosnap = tosnap; | |
784 | sdd.outfd = outfd; | |
785 | sdd.replicate = replicate; | |
786 | sdd.doall = doall; | |
787 | sdd.fromorigin = fromorigin; | |
788 | sdd.fss = fss; | |
789 | sdd.fsavl = fsavl; | |
790 | sdd.verbose = verbose; | |
791 | err = dump_filesystems(zhp, &sdd); | |
792 | fsavl_destroy(fsavl); | |
793 | nvlist_free(fss); | |
794 | ||
795 | if (replicate || doall) { | |
796 | /* | |
797 | * write final end record. NB: want to do this even if | |
798 | * there was some error, because it might not be totally | |
799 | * failed. | |
800 | */ | |
801 | dmu_replay_record_t drr = { 0 }; | |
802 | drr.drr_type = DRR_END; | |
803 | if (write(outfd, &drr, sizeof (drr)) == -1) { | |
804 | return (zfs_standard_error(zhp->zfs_hdl, | |
805 | errno, errbuf)); | |
806 | } | |
807 | } | |
808 | ||
809 | return (err || sdd.err); | |
810 | } | |
811 | ||
812 | /* | |
813 | * Routines specific to "zfs recv" | |
814 | */ | |
815 | ||
816 | static int | |
817 | recv_read(libzfs_handle_t *hdl, int fd, void *buf, int ilen, | |
818 | boolean_t byteswap, zio_cksum_t *zc) | |
819 | { | |
820 | char *cp = buf; | |
821 | int rv; | |
822 | int len = ilen; | |
823 | ||
824 | do { | |
825 | rv = read(fd, cp, len); | |
826 | cp += rv; | |
827 | len -= rv; | |
828 | } while (rv > 0); | |
829 | ||
830 | if (rv < 0 || len != 0) { | |
831 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
832 | "failed to read from stream")); | |
833 | return (zfs_error(hdl, EZFS_BADSTREAM, dgettext(TEXT_DOMAIN, | |
834 | "cannot receive"))); | |
835 | } | |
836 | ||
837 | if (zc) { | |
838 | if (byteswap) | |
839 | fletcher_4_incremental_byteswap(buf, ilen, zc); | |
840 | else | |
841 | fletcher_4_incremental_native(buf, ilen, zc); | |
842 | } | |
843 | return (0); | |
844 | } | |
845 | ||
846 | static int | |
847 | recv_read_nvlist(libzfs_handle_t *hdl, int fd, int len, nvlist_t **nvp, | |
848 | boolean_t byteswap, zio_cksum_t *zc) | |
849 | { | |
850 | char *buf; | |
851 | int err; | |
852 | ||
853 | buf = zfs_alloc(hdl, len); | |
854 | if (buf == NULL) | |
855 | return (ENOMEM); | |
856 | ||
857 | err = recv_read(hdl, fd, buf, len, byteswap, zc); | |
858 | if (err != 0) { | |
859 | free(buf); | |
860 | return (err); | |
861 | } | |
862 | ||
863 | err = nvlist_unpack(buf, len, nvp, 0); | |
864 | free(buf); | |
865 | if (err != 0) { | |
866 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
867 | "stream (malformed nvlist)")); | |
868 | return (EINVAL); | |
869 | } | |
870 | return (0); | |
871 | } | |
872 | ||
873 | static int | |
874 | recv_rename(libzfs_handle_t *hdl, const char *name, const char *tryname, | |
875 | int baselen, char *newname, recvflags_t flags) | |
876 | { | |
877 | static int seq; | |
878 | zfs_cmd_t zc = { 0 }; | |
879 | int err; | |
880 | prop_changelist_t *clp; | |
881 | zfs_handle_t *zhp; | |
882 | ||
883 | zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); | |
884 | if (zhp == NULL) | |
885 | return (-1); | |
b128c09f BB |
886 | clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, |
887 | flags.force ? MS_FORCE : 0); | |
34dc7c2f BB |
888 | zfs_close(zhp); |
889 | if (clp == NULL) | |
890 | return (-1); | |
891 | err = changelist_prefix(clp); | |
892 | if (err) | |
893 | return (err); | |
894 | ||
895 | if (tryname) { | |
896 | (void) strcpy(newname, tryname); | |
897 | ||
898 | zc.zc_objset_type = DMU_OST_ZFS; | |
899 | (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); | |
900 | (void) strlcpy(zc.zc_value, tryname, sizeof (zc.zc_value)); | |
901 | ||
902 | if (flags.verbose) { | |
903 | (void) printf("attempting rename %s to %s\n", | |
904 | zc.zc_name, zc.zc_value); | |
905 | } | |
906 | err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); | |
907 | if (err == 0) | |
908 | changelist_rename(clp, name, tryname); | |
909 | } else { | |
910 | err = ENOENT; | |
911 | } | |
912 | ||
913 | if (err != 0 && strncmp(name+baselen, "recv-", 5) != 0) { | |
914 | seq++; | |
915 | ||
916 | (void) strncpy(newname, name, baselen); | |
917 | (void) snprintf(newname+baselen, ZFS_MAXNAMELEN-baselen, | |
918 | "recv-%u-%u", getpid(), seq); | |
919 | (void) strlcpy(zc.zc_value, newname, sizeof (zc.zc_value)); | |
920 | ||
921 | if (flags.verbose) { | |
922 | (void) printf("failed - trying rename %s to %s\n", | |
923 | zc.zc_name, zc.zc_value); | |
924 | } | |
925 | err = ioctl(hdl->libzfs_fd, ZFS_IOC_RENAME, &zc); | |
926 | if (err == 0) | |
927 | changelist_rename(clp, name, newname); | |
928 | if (err && flags.verbose) { | |
929 | (void) printf("failed (%u) - " | |
930 | "will try again on next pass\n", errno); | |
931 | } | |
932 | err = EAGAIN; | |
933 | } else if (flags.verbose) { | |
934 | if (err == 0) | |
935 | (void) printf("success\n"); | |
936 | else | |
937 | (void) printf("failed (%u)\n", errno); | |
938 | } | |
939 | ||
940 | (void) changelist_postfix(clp); | |
941 | changelist_free(clp); | |
942 | ||
943 | return (err); | |
944 | } | |
945 | ||
946 | static int | |
947 | recv_destroy(libzfs_handle_t *hdl, const char *name, int baselen, | |
948 | char *newname, recvflags_t flags) | |
949 | { | |
950 | zfs_cmd_t zc = { 0 }; | |
951 | int err = 0; | |
952 | prop_changelist_t *clp; | |
953 | zfs_handle_t *zhp; | |
954 | ||
955 | zhp = zfs_open(hdl, name, ZFS_TYPE_DATASET); | |
956 | if (zhp == NULL) | |
957 | return (-1); | |
b128c09f BB |
958 | clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, |
959 | flags.force ? MS_FORCE : 0); | |
34dc7c2f BB |
960 | zfs_close(zhp); |
961 | if (clp == NULL) | |
962 | return (-1); | |
963 | err = changelist_prefix(clp); | |
964 | if (err) | |
965 | return (err); | |
966 | ||
967 | zc.zc_objset_type = DMU_OST_ZFS; | |
968 | (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); | |
969 | ||
970 | if (flags.verbose) | |
971 | (void) printf("attempting destroy %s\n", zc.zc_name); | |
972 | err = ioctl(hdl->libzfs_fd, ZFS_IOC_DESTROY, &zc); | |
973 | ||
974 | if (err == 0) { | |
975 | if (flags.verbose) | |
976 | (void) printf("success\n"); | |
977 | changelist_remove(clp, zc.zc_name); | |
978 | } | |
979 | ||
980 | (void) changelist_postfix(clp); | |
981 | changelist_free(clp); | |
982 | ||
983 | if (err != 0) | |
984 | err = recv_rename(hdl, name, NULL, baselen, newname, flags); | |
985 | ||
986 | return (err); | |
987 | } | |
988 | ||
989 | typedef struct guid_to_name_data { | |
990 | uint64_t guid; | |
991 | char *name; | |
992 | } guid_to_name_data_t; | |
993 | ||
994 | static int | |
995 | guid_to_name_cb(zfs_handle_t *zhp, void *arg) | |
996 | { | |
997 | guid_to_name_data_t *gtnd = arg; | |
998 | int err; | |
999 | ||
1000 | if (zhp->zfs_dmustats.dds_guid == gtnd->guid) { | |
1001 | (void) strcpy(gtnd->name, zhp->zfs_name); | |
1002 | return (EEXIST); | |
1003 | } | |
1004 | err = zfs_iter_children(zhp, guid_to_name_cb, gtnd); | |
1005 | zfs_close(zhp); | |
1006 | return (err); | |
1007 | } | |
1008 | ||
1009 | static int | |
1010 | guid_to_name(libzfs_handle_t *hdl, const char *parent, uint64_t guid, | |
1011 | char *name) | |
1012 | { | |
1013 | /* exhaustive search all local snapshots */ | |
1014 | guid_to_name_data_t gtnd; | |
1015 | int err = 0; | |
1016 | zfs_handle_t *zhp; | |
1017 | char *cp; | |
1018 | ||
1019 | gtnd.guid = guid; | |
1020 | gtnd.name = name; | |
1021 | ||
1022 | if (strchr(parent, '@') == NULL) { | |
1023 | zhp = make_dataset_handle(hdl, parent); | |
1024 | if (zhp != NULL) { | |
1025 | err = zfs_iter_children(zhp, guid_to_name_cb, >nd); | |
1026 | zfs_close(zhp); | |
1027 | if (err == EEXIST) | |
1028 | return (0); | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | cp = strchr(parent, '/'); | |
1033 | if (cp) | |
1034 | *cp = '\0'; | |
1035 | zhp = make_dataset_handle(hdl, parent); | |
1036 | if (cp) | |
1037 | *cp = '/'; | |
1038 | ||
1039 | if (zhp) { | |
1040 | err = zfs_iter_children(zhp, guid_to_name_cb, >nd); | |
1041 | zfs_close(zhp); | |
1042 | } | |
1043 | ||
1044 | return (err == EEXIST ? 0 : ENOENT); | |
1045 | ||
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * Return true if dataset guid1 is created before guid2. | |
1050 | */ | |
1051 | static int | |
1052 | created_before(libzfs_handle_t *hdl, avl_tree_t *avl, | |
1053 | uint64_t guid1, uint64_t guid2) | |
1054 | { | |
1055 | nvlist_t *nvfs; | |
1056 | char *fsname, *snapname; | |
1057 | char buf[ZFS_MAXNAMELEN]; | |
1058 | int rv; | |
1059 | zfs_node_t zn1, zn2; | |
1060 | ||
1061 | if (guid2 == 0) | |
1062 | return (0); | |
1063 | if (guid1 == 0) | |
1064 | return (1); | |
1065 | ||
1066 | nvfs = fsavl_find(avl, guid1, &snapname); | |
1067 | VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
1068 | (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); | |
1069 | zn1.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); | |
1070 | if (zn1.zn_handle == NULL) | |
1071 | return (-1); | |
1072 | ||
1073 | nvfs = fsavl_find(avl, guid2, &snapname); | |
1074 | VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
1075 | (void) snprintf(buf, sizeof (buf), "%s@%s", fsname, snapname); | |
1076 | zn2.zn_handle = zfs_open(hdl, buf, ZFS_TYPE_SNAPSHOT); | |
1077 | if (zn2.zn_handle == NULL) { | |
1078 | zfs_close(zn2.zn_handle); | |
1079 | return (-1); | |
1080 | } | |
1081 | ||
1082 | rv = (zfs_snapshot_compare(&zn1, &zn2) == -1); | |
1083 | ||
1084 | zfs_close(zn1.zn_handle); | |
1085 | zfs_close(zn2.zn_handle); | |
1086 | ||
1087 | return (rv); | |
1088 | } | |
1089 | ||
1090 | static int | |
1091 | recv_incremental_replication(libzfs_handle_t *hdl, const char *tofs, | |
1092 | recvflags_t flags, nvlist_t *stream_nv, avl_tree_t *stream_avl) | |
1093 | { | |
1094 | nvlist_t *local_nv; | |
1095 | avl_tree_t *local_avl; | |
1096 | nvpair_t *fselem, *nextfselem; | |
1097 | char *tosnap, *fromsnap; | |
1098 | char newname[ZFS_MAXNAMELEN]; | |
1099 | int error; | |
1100 | boolean_t needagain, progress; | |
1101 | ||
1102 | VERIFY(0 == nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap)); | |
1103 | VERIFY(0 == nvlist_lookup_string(stream_nv, "tosnap", &tosnap)); | |
1104 | ||
1105 | if (flags.dryrun) | |
1106 | return (0); | |
1107 | ||
1108 | again: | |
1109 | needagain = progress = B_FALSE; | |
1110 | ||
1111 | if ((error = gather_nvlist(hdl, tofs, fromsnap, NULL, | |
1112 | &local_nv, &local_avl)) != 0) | |
1113 | return (error); | |
1114 | ||
1115 | /* | |
1116 | * Process deletes and renames | |
1117 | */ | |
1118 | for (fselem = nvlist_next_nvpair(local_nv, NULL); | |
1119 | fselem; fselem = nextfselem) { | |
1120 | nvlist_t *nvfs, *snaps; | |
1121 | nvlist_t *stream_nvfs = NULL; | |
1122 | nvpair_t *snapelem, *nextsnapelem; | |
1123 | uint64_t fromguid = 0; | |
1124 | uint64_t originguid = 0; | |
1125 | uint64_t stream_originguid = 0; | |
1126 | uint64_t parent_fromsnap_guid, stream_parent_fromsnap_guid; | |
1127 | char *fsname, *stream_fsname; | |
1128 | ||
1129 | nextfselem = nvlist_next_nvpair(local_nv, fselem); | |
1130 | ||
1131 | VERIFY(0 == nvpair_value_nvlist(fselem, &nvfs)); | |
1132 | VERIFY(0 == nvlist_lookup_nvlist(nvfs, "snaps", &snaps)); | |
1133 | VERIFY(0 == nvlist_lookup_string(nvfs, "name", &fsname)); | |
1134 | VERIFY(0 == nvlist_lookup_uint64(nvfs, "parentfromsnap", | |
1135 | &parent_fromsnap_guid)); | |
1136 | (void) nvlist_lookup_uint64(nvfs, "origin", &originguid); | |
1137 | ||
1138 | /* | |
1139 | * First find the stream's fs, so we can check for | |
1140 | * a different origin (due to "zfs promote") | |
1141 | */ | |
1142 | for (snapelem = nvlist_next_nvpair(snaps, NULL); | |
1143 | snapelem; snapelem = nvlist_next_nvpair(snaps, snapelem)) { | |
1144 | uint64_t thisguid; | |
1145 | ||
1146 | VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); | |
1147 | stream_nvfs = fsavl_find(stream_avl, thisguid, NULL); | |
1148 | ||
1149 | if (stream_nvfs != NULL) | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | /* check for promote */ | |
1154 | (void) nvlist_lookup_uint64(stream_nvfs, "origin", | |
1155 | &stream_originguid); | |
1156 | if (stream_nvfs && originguid != stream_originguid) { | |
1157 | switch (created_before(hdl, local_avl, | |
1158 | stream_originguid, originguid)) { | |
1159 | case 1: { | |
1160 | /* promote it! */ | |
1161 | zfs_cmd_t zc = { 0 }; | |
1162 | nvlist_t *origin_nvfs; | |
1163 | char *origin_fsname; | |
1164 | ||
1165 | if (flags.verbose) | |
1166 | (void) printf("promoting %s\n", fsname); | |
1167 | ||
1168 | origin_nvfs = fsavl_find(local_avl, originguid, | |
1169 | NULL); | |
1170 | VERIFY(0 == nvlist_lookup_string(origin_nvfs, | |
1171 | "name", &origin_fsname)); | |
1172 | (void) strlcpy(zc.zc_value, origin_fsname, | |
1173 | sizeof (zc.zc_value)); | |
1174 | (void) strlcpy(zc.zc_name, fsname, | |
1175 | sizeof (zc.zc_name)); | |
1176 | error = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); | |
1177 | if (error == 0) | |
1178 | progress = B_TRUE; | |
1179 | break; | |
1180 | } | |
1181 | default: | |
1182 | break; | |
1183 | case -1: | |
1184 | fsavl_destroy(local_avl); | |
1185 | nvlist_free(local_nv); | |
1186 | return (-1); | |
1187 | } | |
1188 | /* | |
1189 | * We had/have the wrong origin, therefore our | |
1190 | * list of snapshots is wrong. Need to handle | |
1191 | * them on the next pass. | |
1192 | */ | |
1193 | needagain = B_TRUE; | |
1194 | continue; | |
1195 | } | |
1196 | ||
1197 | for (snapelem = nvlist_next_nvpair(snaps, NULL); | |
1198 | snapelem; snapelem = nextsnapelem) { | |
1199 | uint64_t thisguid; | |
1200 | char *stream_snapname; | |
b128c09f | 1201 | nvlist_t *found, *props; |
34dc7c2f BB |
1202 | |
1203 | nextsnapelem = nvlist_next_nvpair(snaps, snapelem); | |
1204 | ||
1205 | VERIFY(0 == nvpair_value_uint64(snapelem, &thisguid)); | |
1206 | found = fsavl_find(stream_avl, thisguid, | |
1207 | &stream_snapname); | |
1208 | ||
1209 | /* check for delete */ | |
1210 | if (found == NULL) { | |
1211 | char name[ZFS_MAXNAMELEN]; | |
1212 | ||
1213 | if (!flags.force) | |
1214 | continue; | |
1215 | ||
1216 | (void) snprintf(name, sizeof (name), "%s@%s", | |
1217 | fsname, nvpair_name(snapelem)); | |
1218 | ||
1219 | error = recv_destroy(hdl, name, | |
1220 | strlen(fsname)+1, newname, flags); | |
1221 | if (error) | |
1222 | needagain = B_TRUE; | |
1223 | else | |
1224 | progress = B_TRUE; | |
1225 | continue; | |
1226 | } | |
1227 | ||
1228 | stream_nvfs = found; | |
1229 | ||
b128c09f BB |
1230 | if (0 == nvlist_lookup_nvlist(stream_nvfs, "snapprops", |
1231 | &props) && 0 == nvlist_lookup_nvlist(props, | |
1232 | stream_snapname, &props)) { | |
1233 | zfs_cmd_t zc = { 0 }; | |
1234 | ||
1235 | zc.zc_cookie = B_TRUE; /* clear current props */ | |
1236 | (void) snprintf(zc.zc_name, sizeof (zc.zc_name), | |
1237 | "%s@%s", fsname, nvpair_name(snapelem)); | |
1238 | if (zcmd_write_src_nvlist(hdl, &zc, | |
1239 | props) == 0) { | |
1240 | (void) zfs_ioctl(hdl, | |
1241 | ZFS_IOC_SET_PROP, &zc); | |
1242 | zcmd_free_nvlists(&zc); | |
1243 | } | |
1244 | } | |
1245 | ||
34dc7c2f BB |
1246 | /* check for different snapname */ |
1247 | if (strcmp(nvpair_name(snapelem), | |
1248 | stream_snapname) != 0) { | |
1249 | char name[ZFS_MAXNAMELEN]; | |
1250 | char tryname[ZFS_MAXNAMELEN]; | |
1251 | ||
1252 | (void) snprintf(name, sizeof (name), "%s@%s", | |
1253 | fsname, nvpair_name(snapelem)); | |
1254 | (void) snprintf(tryname, sizeof (name), "%s@%s", | |
1255 | fsname, stream_snapname); | |
1256 | ||
1257 | error = recv_rename(hdl, name, tryname, | |
1258 | strlen(fsname)+1, newname, flags); | |
1259 | if (error) | |
1260 | needagain = B_TRUE; | |
1261 | else | |
1262 | progress = B_TRUE; | |
1263 | } | |
1264 | ||
1265 | if (strcmp(stream_snapname, fromsnap) == 0) | |
1266 | fromguid = thisguid; | |
1267 | } | |
1268 | ||
1269 | /* check for delete */ | |
1270 | if (stream_nvfs == NULL) { | |
1271 | if (!flags.force) | |
1272 | continue; | |
1273 | ||
1274 | error = recv_destroy(hdl, fsname, strlen(tofs)+1, | |
1275 | newname, flags); | |
1276 | if (error) | |
1277 | needagain = B_TRUE; | |
1278 | else | |
1279 | progress = B_TRUE; | |
1280 | continue; | |
1281 | } | |
1282 | ||
1283 | if (fromguid == 0 && flags.verbose) { | |
1284 | (void) printf("local fs %s does not have fromsnap " | |
1285 | "(%s in stream); must have been deleted locally; " | |
1286 | "ignoring\n", fsname, fromsnap); | |
1287 | continue; | |
1288 | } | |
1289 | ||
1290 | VERIFY(0 == nvlist_lookup_string(stream_nvfs, | |
1291 | "name", &stream_fsname)); | |
1292 | VERIFY(0 == nvlist_lookup_uint64(stream_nvfs, | |
1293 | "parentfromsnap", &stream_parent_fromsnap_guid)); | |
1294 | ||
1295 | /* check for rename */ | |
1296 | if ((stream_parent_fromsnap_guid != 0 && | |
1297 | stream_parent_fromsnap_guid != parent_fromsnap_guid) || | |
1298 | strcmp(strrchr(fsname, '/'), | |
1299 | strrchr(stream_fsname, '/')) != 0) { | |
1300 | nvlist_t *parent; | |
1301 | char tryname[ZFS_MAXNAMELEN]; | |
1302 | ||
1303 | parent = fsavl_find(local_avl, | |
1304 | stream_parent_fromsnap_guid, NULL); | |
1305 | /* | |
1306 | * NB: parent might not be found if we used the | |
1307 | * tosnap for stream_parent_fromsnap_guid, | |
1308 | * because the parent is a newly-created fs; | |
1309 | * we'll be able to rename it after we recv the | |
1310 | * new fs. | |
1311 | */ | |
1312 | if (parent != NULL) { | |
1313 | char *pname; | |
1314 | ||
1315 | VERIFY(0 == nvlist_lookup_string(parent, "name", | |
1316 | &pname)); | |
1317 | (void) snprintf(tryname, sizeof (tryname), | |
1318 | "%s%s", pname, strrchr(stream_fsname, '/')); | |
1319 | } else { | |
1320 | tryname[0] = '\0'; | |
1321 | if (flags.verbose) { | |
1322 | (void) printf("local fs %s new parent " | |
1323 | "not found\n", fsname); | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | error = recv_rename(hdl, fsname, tryname, | |
1328 | strlen(tofs)+1, newname, flags); | |
1329 | if (error) | |
1330 | needagain = B_TRUE; | |
1331 | else | |
1332 | progress = B_TRUE; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | fsavl_destroy(local_avl); | |
1337 | nvlist_free(local_nv); | |
1338 | ||
1339 | if (needagain && progress) { | |
1340 | /* do another pass to fix up temporary names */ | |
1341 | if (flags.verbose) | |
1342 | (void) printf("another pass:\n"); | |
1343 | goto again; | |
1344 | } | |
1345 | ||
1346 | return (needagain); | |
1347 | } | |
1348 | ||
1349 | static int | |
1350 | zfs_receive_package(libzfs_handle_t *hdl, int fd, const char *destname, | |
b128c09f BB |
1351 | recvflags_t flags, dmu_replay_record_t *drr, zio_cksum_t *zc, |
1352 | char **top_zfs) | |
34dc7c2f BB |
1353 | { |
1354 | nvlist_t *stream_nv = NULL; | |
1355 | avl_tree_t *stream_avl = NULL; | |
1356 | char *fromsnap = NULL; | |
1357 | char tofs[ZFS_MAXNAMELEN]; | |
1358 | char errbuf[1024]; | |
1359 | dmu_replay_record_t drre; | |
1360 | int error; | |
1361 | boolean_t anyerr = B_FALSE; | |
1362 | boolean_t softerr = B_FALSE; | |
1363 | ||
1364 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
1365 | "cannot receive")); | |
1366 | ||
1367 | if (strchr(destname, '@')) { | |
1368 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1369 | "can not specify snapshot name for multi-snapshot stream")); | |
1370 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
1371 | } | |
1372 | ||
1373 | assert(drr->drr_type == DRR_BEGIN); | |
1374 | assert(drr->drr_u.drr_begin.drr_magic == DMU_BACKUP_MAGIC); | |
1375 | assert(drr->drr_u.drr_begin.drr_version == DMU_BACKUP_HEADER_VERSION); | |
1376 | ||
1377 | /* | |
1378 | * Read in the nvlist from the stream. | |
1379 | */ | |
1380 | if (drr->drr_payloadlen != 0) { | |
1381 | if (!flags.isprefix) { | |
1382 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1383 | "must use -d to receive replication " | |
1384 | "(send -R) stream")); | |
1385 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
1386 | } | |
1387 | ||
1388 | error = recv_read_nvlist(hdl, fd, drr->drr_payloadlen, | |
1389 | &stream_nv, flags.byteswap, zc); | |
1390 | if (error) { | |
1391 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
1392 | goto out; | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * Read in the end record and verify checksum. | |
1398 | */ | |
1399 | if (0 != (error = recv_read(hdl, fd, &drre, sizeof (drre), | |
1400 | flags.byteswap, NULL))) | |
1401 | goto out; | |
1402 | if (flags.byteswap) { | |
1403 | drre.drr_type = BSWAP_32(drre.drr_type); | |
1404 | drre.drr_u.drr_end.drr_checksum.zc_word[0] = | |
1405 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[0]); | |
1406 | drre.drr_u.drr_end.drr_checksum.zc_word[1] = | |
1407 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[1]); | |
1408 | drre.drr_u.drr_end.drr_checksum.zc_word[2] = | |
1409 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[2]); | |
1410 | drre.drr_u.drr_end.drr_checksum.zc_word[3] = | |
1411 | BSWAP_64(drre.drr_u.drr_end.drr_checksum.zc_word[3]); | |
1412 | } | |
1413 | if (drre.drr_type != DRR_END) { | |
1414 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
1415 | goto out; | |
1416 | } | |
1417 | if (!ZIO_CHECKSUM_EQUAL(drre.drr_u.drr_end.drr_checksum, *zc)) { | |
1418 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1419 | "incorrect header checksum")); | |
1420 | error = zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
1421 | goto out; | |
1422 | } | |
1423 | ||
1424 | (void) nvlist_lookup_string(stream_nv, "fromsnap", &fromsnap); | |
1425 | ||
1426 | if (drr->drr_payloadlen != 0) { | |
1427 | nvlist_t *stream_fss; | |
1428 | ||
1429 | VERIFY(0 == nvlist_lookup_nvlist(stream_nv, "fss", | |
1430 | &stream_fss)); | |
1431 | if ((stream_avl = fsavl_create(stream_fss)) == NULL) { | |
1432 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1433 | "couldn't allocate avl tree")); | |
1434 | error = zfs_error(hdl, EZFS_NOMEM, errbuf); | |
1435 | goto out; | |
1436 | } | |
1437 | ||
1438 | if (fromsnap != NULL) { | |
1439 | (void) strlcpy(tofs, destname, ZFS_MAXNAMELEN); | |
1440 | if (flags.isprefix) { | |
1441 | int i = strcspn(drr->drr_u.drr_begin.drr_toname, | |
1442 | "/@"); | |
1443 | /* zfs_receive_one() will create_parents() */ | |
1444 | (void) strlcat(tofs, | |
1445 | &drr->drr_u.drr_begin.drr_toname[i], | |
1446 | ZFS_MAXNAMELEN); | |
1447 | *strchr(tofs, '@') = '\0'; | |
1448 | } | |
1449 | softerr = recv_incremental_replication(hdl, tofs, | |
1450 | flags, stream_nv, stream_avl); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | ||
1455 | /* Finally, receive each contained stream */ | |
1456 | do { | |
1457 | /* | |
1458 | * we should figure out if it has a recoverable | |
1459 | * error, in which case do a recv_skip() and drive on. | |
1460 | * Note, if we fail due to already having this guid, | |
1461 | * zfs_receive_one() will take care of it (ie, | |
1462 | * recv_skip() and return 0). | |
1463 | */ | |
b128c09f BB |
1464 | error = zfs_receive_impl(hdl, destname, flags, fd, |
1465 | stream_avl, top_zfs); | |
34dc7c2f BB |
1466 | if (error == ENODATA) { |
1467 | error = 0; | |
1468 | break; | |
1469 | } | |
1470 | anyerr |= error; | |
1471 | } while (error == 0); | |
1472 | ||
1473 | if (drr->drr_payloadlen != 0 && fromsnap != NULL) { | |
1474 | /* | |
1475 | * Now that we have the fs's they sent us, try the | |
1476 | * renames again. | |
1477 | */ | |
1478 | softerr = recv_incremental_replication(hdl, tofs, flags, | |
1479 | stream_nv, stream_avl); | |
1480 | } | |
1481 | ||
1482 | out: | |
1483 | fsavl_destroy(stream_avl); | |
1484 | if (stream_nv) | |
1485 | nvlist_free(stream_nv); | |
1486 | if (softerr) | |
1487 | error = -2; | |
1488 | if (anyerr) | |
1489 | error = -1; | |
1490 | return (error); | |
1491 | } | |
1492 | ||
1493 | static int | |
1494 | recv_skip(libzfs_handle_t *hdl, int fd, boolean_t byteswap) | |
1495 | { | |
1496 | dmu_replay_record_t *drr; | |
1497 | void *buf = malloc(1<<20); | |
1498 | ||
1499 | /* XXX would be great to use lseek if possible... */ | |
1500 | drr = buf; | |
1501 | ||
1502 | while (recv_read(hdl, fd, drr, sizeof (dmu_replay_record_t), | |
1503 | byteswap, NULL) == 0) { | |
1504 | if (byteswap) | |
1505 | drr->drr_type = BSWAP_32(drr->drr_type); | |
1506 | ||
1507 | switch (drr->drr_type) { | |
1508 | case DRR_BEGIN: | |
1509 | /* NB: not to be used on v2 stream packages */ | |
1510 | assert(drr->drr_payloadlen == 0); | |
1511 | break; | |
1512 | ||
1513 | case DRR_END: | |
1514 | free(buf); | |
1515 | return (0); | |
1516 | ||
1517 | case DRR_OBJECT: | |
1518 | if (byteswap) { | |
1519 | drr->drr_u.drr_object.drr_bonuslen = | |
1520 | BSWAP_32(drr->drr_u.drr_object. | |
1521 | drr_bonuslen); | |
1522 | } | |
1523 | (void) recv_read(hdl, fd, buf, | |
1524 | P2ROUNDUP(drr->drr_u.drr_object.drr_bonuslen, 8), | |
1525 | B_FALSE, NULL); | |
1526 | break; | |
1527 | ||
1528 | case DRR_WRITE: | |
1529 | if (byteswap) { | |
1530 | drr->drr_u.drr_write.drr_length = | |
b128c09f | 1531 | BSWAP_64(drr->drr_u.drr_write.drr_length); |
34dc7c2f BB |
1532 | } |
1533 | (void) recv_read(hdl, fd, buf, | |
1534 | drr->drr_u.drr_write.drr_length, B_FALSE, NULL); | |
1535 | break; | |
1536 | ||
1537 | case DRR_FREEOBJECTS: | |
1538 | case DRR_FREE: | |
1539 | break; | |
1540 | ||
1541 | default: | |
1542 | assert(!"invalid record type"); | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | free(buf); | |
1547 | return (-1); | |
1548 | } | |
1549 | ||
1550 | /* | |
1551 | * Restores a backup of tosnap from the file descriptor specified by infd. | |
1552 | */ | |
1553 | static int | |
1554 | zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap, | |
1555 | recvflags_t flags, dmu_replay_record_t *drr, | |
b128c09f BB |
1556 | dmu_replay_record_t *drr_noswap, avl_tree_t *stream_avl, |
1557 | char **top_zfs) | |
34dc7c2f BB |
1558 | { |
1559 | zfs_cmd_t zc = { 0 }; | |
1560 | time_t begin_time; | |
1561 | int ioctl_err, ioctl_errno, err, choplen; | |
1562 | char *cp; | |
1563 | struct drr_begin *drrb = &drr->drr_u.drr_begin; | |
1564 | char errbuf[1024]; | |
1565 | char chopprefix[ZFS_MAXNAMELEN]; | |
1566 | boolean_t newfs = B_FALSE; | |
1567 | boolean_t stream_wantsnewfs; | |
1568 | uint64_t parent_snapguid = 0; | |
1569 | prop_changelist_t *clp = NULL; | |
b128c09f | 1570 | nvlist_t *snapprops_nvlist = NULL; |
34dc7c2f BB |
1571 | |
1572 | begin_time = time(NULL); | |
1573 | ||
1574 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
1575 | "cannot receive")); | |
1576 | ||
1577 | if (stream_avl != NULL) { | |
b128c09f BB |
1578 | char *snapname; |
1579 | nvlist_t *fs = fsavl_find(stream_avl, drrb->drr_toguid, | |
1580 | &snapname); | |
34dc7c2f BB |
1581 | nvlist_t *props; |
1582 | int ret; | |
1583 | ||
1584 | (void) nvlist_lookup_uint64(fs, "parentfromsnap", | |
1585 | &parent_snapguid); | |
1586 | err = nvlist_lookup_nvlist(fs, "props", &props); | |
1587 | if (err) | |
1588 | VERIFY(0 == nvlist_alloc(&props, NV_UNIQUE_NAME, 0)); | |
1589 | ||
1590 | if (flags.canmountoff) { | |
1591 | VERIFY(0 == nvlist_add_uint64(props, | |
1592 | zfs_prop_to_name(ZFS_PROP_CANMOUNT), 0)); | |
1593 | } | |
1594 | ret = zcmd_write_src_nvlist(hdl, &zc, props); | |
1595 | if (err) | |
1596 | nvlist_free(props); | |
1597 | ||
b128c09f BB |
1598 | if (0 == nvlist_lookup_nvlist(fs, "snapprops", &props)) { |
1599 | VERIFY(0 == nvlist_lookup_nvlist(props, | |
1600 | snapname, &snapprops_nvlist)); | |
1601 | } | |
1602 | ||
34dc7c2f BB |
1603 | if (ret != 0) |
1604 | return (-1); | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Determine how much of the snapshot name stored in the stream | |
1609 | * we are going to tack on to the name they specified on the | |
1610 | * command line, and how much we are going to chop off. | |
1611 | * | |
1612 | * If they specified a snapshot, chop the entire name stored in | |
1613 | * the stream. | |
1614 | */ | |
1615 | (void) strcpy(chopprefix, drrb->drr_toname); | |
1616 | if (flags.isprefix) { | |
1617 | /* | |
1618 | * They specified a fs with -d, we want to tack on | |
1619 | * everything but the pool name stored in the stream | |
1620 | */ | |
1621 | if (strchr(tosnap, '@')) { | |
1622 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
1623 | "argument - snapshot not allowed with -d")); | |
1624 | return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); | |
1625 | } | |
1626 | cp = strchr(chopprefix, '/'); | |
1627 | if (cp == NULL) | |
1628 | cp = strchr(chopprefix, '@'); | |
1629 | *cp = '\0'; | |
1630 | } else if (strchr(tosnap, '@') == NULL) { | |
1631 | /* | |
1632 | * If they specified a filesystem without -d, we want to | |
1633 | * tack on everything after the fs specified in the | |
1634 | * first name from the stream. | |
1635 | */ | |
1636 | cp = strchr(chopprefix, '@'); | |
1637 | *cp = '\0'; | |
1638 | } | |
1639 | choplen = strlen(chopprefix); | |
1640 | ||
1641 | /* | |
1642 | * Determine name of destination snapshot, store in zc_value. | |
1643 | */ | |
1644 | (void) strcpy(zc.zc_value, tosnap); | |
1645 | (void) strncat(zc.zc_value, drrb->drr_toname+choplen, | |
1646 | sizeof (zc.zc_value)); | |
1647 | if (!zfs_name_valid(zc.zc_value, ZFS_TYPE_SNAPSHOT)) { | |
1648 | zcmd_free_nvlists(&zc); | |
1649 | return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); | |
1650 | } | |
1651 | ||
1652 | /* | |
1653 | * Determine the name of the origin snapshot, store in zc_string. | |
1654 | */ | |
1655 | if (drrb->drr_flags & DRR_FLAG_CLONE) { | |
1656 | if (guid_to_name(hdl, tosnap, | |
1657 | drrb->drr_fromguid, zc.zc_string) != 0) { | |
1658 | zcmd_free_nvlists(&zc); | |
1659 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1660 | "local origin for clone %s does not exist"), | |
1661 | zc.zc_value); | |
1662 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
1663 | } | |
1664 | if (flags.verbose) | |
1665 | (void) printf("found clone origin %s\n", zc.zc_string); | |
1666 | } | |
1667 | ||
1668 | stream_wantsnewfs = (drrb->drr_fromguid == NULL || | |
1669 | (drrb->drr_flags & DRR_FLAG_CLONE)); | |
1670 | ||
1671 | if (stream_wantsnewfs) { | |
1672 | /* | |
1673 | * if the parent fs does not exist, look for it based on | |
1674 | * the parent snap GUID | |
1675 | */ | |
1676 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
1677 | "cannot receive new filesystem stream")); | |
1678 | ||
1679 | (void) strcpy(zc.zc_name, zc.zc_value); | |
1680 | cp = strrchr(zc.zc_name, '/'); | |
1681 | if (cp) | |
1682 | *cp = '\0'; | |
1683 | if (cp && | |
1684 | !zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
1685 | char suffix[ZFS_MAXNAMELEN]; | |
1686 | (void) strcpy(suffix, strrchr(zc.zc_value, '/')); | |
1687 | if (guid_to_name(hdl, tosnap, parent_snapguid, | |
1688 | zc.zc_value) == 0) { | |
1689 | *strchr(zc.zc_value, '@') = '\0'; | |
1690 | (void) strcat(zc.zc_value, suffix); | |
1691 | } | |
1692 | } | |
1693 | } else { | |
1694 | /* | |
1695 | * if the fs does not exist, look for it based on the | |
1696 | * fromsnap GUID | |
1697 | */ | |
1698 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
1699 | "cannot receive incremental stream")); | |
1700 | ||
1701 | (void) strcpy(zc.zc_name, zc.zc_value); | |
1702 | *strchr(zc.zc_name, '@') = '\0'; | |
1703 | ||
1704 | if (!zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
1705 | char snap[ZFS_MAXNAMELEN]; | |
1706 | (void) strcpy(snap, strchr(zc.zc_value, '@')); | |
1707 | if (guid_to_name(hdl, tosnap, drrb->drr_fromguid, | |
1708 | zc.zc_value) == 0) { | |
1709 | *strchr(zc.zc_value, '@') = '\0'; | |
1710 | (void) strcat(zc.zc_value, snap); | |
1711 | } | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | (void) strcpy(zc.zc_name, zc.zc_value); | |
1716 | *strchr(zc.zc_name, '@') = '\0'; | |
1717 | ||
1718 | if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { | |
1719 | zfs_handle_t *zhp; | |
1720 | /* | |
1721 | * Destination fs exists. Therefore this should either | |
1722 | * be an incremental, or the stream specifies a new fs | |
1723 | * (full stream or clone) and they want us to blow it | |
1724 | * away (and have therefore specified -F and removed any | |
1725 | * snapshots). | |
1726 | */ | |
1727 | ||
1728 | if (stream_wantsnewfs) { | |
1729 | if (!flags.force) { | |
1730 | zcmd_free_nvlists(&zc); | |
1731 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1732 | "destination '%s' exists\n" | |
1733 | "must specify -F to overwrite it"), | |
1734 | zc.zc_name); | |
1735 | return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
1736 | } | |
1737 | if (ioctl(hdl->libzfs_fd, ZFS_IOC_SNAPSHOT_LIST_NEXT, | |
1738 | &zc) == 0) { | |
1739 | zcmd_free_nvlists(&zc); | |
1740 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1741 | "destination has snapshots (eg. %s)\n" | |
1742 | "must destroy them to overwrite it"), | |
1743 | zc.zc_name); | |
1744 | return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
1745 | } | |
1746 | } | |
1747 | ||
1748 | if ((zhp = zfs_open(hdl, zc.zc_name, | |
1749 | ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)) == NULL) { | |
1750 | zcmd_free_nvlists(&zc); | |
1751 | return (-1); | |
1752 | } | |
1753 | ||
1754 | if (stream_wantsnewfs && | |
1755 | zhp->zfs_dmustats.dds_origin[0]) { | |
1756 | zcmd_free_nvlists(&zc); | |
1757 | zfs_close(zhp); | |
1758 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1759 | "destination '%s' is a clone\n" | |
1760 | "must destroy it to overwrite it"), | |
1761 | zc.zc_name); | |
1762 | return (zfs_error(hdl, EZFS_EXISTS, errbuf)); | |
1763 | } | |
1764 | ||
1765 | if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_FILESYSTEM && | |
1766 | stream_wantsnewfs) { | |
1767 | /* We can't do online recv in this case */ | |
b128c09f | 1768 | clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0); |
34dc7c2f BB |
1769 | if (clp == NULL) { |
1770 | zcmd_free_nvlists(&zc); | |
1771 | return (-1); | |
1772 | } | |
1773 | if (changelist_prefix(clp) != 0) { | |
1774 | changelist_free(clp); | |
1775 | zcmd_free_nvlists(&zc); | |
1776 | return (-1); | |
1777 | } | |
1778 | } | |
1779 | if (!flags.dryrun && zhp->zfs_type == ZFS_TYPE_VOLUME && | |
1780 | zvol_remove_link(hdl, zhp->zfs_name) != 0) { | |
1781 | zfs_close(zhp); | |
1782 | zcmd_free_nvlists(&zc); | |
1783 | return (-1); | |
1784 | } | |
1785 | zfs_close(zhp); | |
1786 | } else { | |
1787 | /* | |
1788 | * Destination filesystem does not exist. Therefore we better | |
1789 | * be creating a new filesystem (either from a full backup, or | |
1790 | * a clone). It would therefore be invalid if the user | |
1791 | * specified only the pool name (i.e. if the destination name | |
1792 | * contained no slash character). | |
1793 | */ | |
1794 | if (!stream_wantsnewfs || | |
1795 | (cp = strrchr(zc.zc_name, '/')) == NULL) { | |
1796 | zcmd_free_nvlists(&zc); | |
1797 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1798 | "destination '%s' does not exist"), zc.zc_name); | |
1799 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
1800 | } | |
1801 | ||
1802 | /* | |
1803 | * Trim off the final dataset component so we perform the | |
1804 | * recvbackup ioctl to the filesystems's parent. | |
1805 | */ | |
1806 | *cp = '\0'; | |
1807 | ||
1808 | if (flags.isprefix && !flags.dryrun && | |
1809 | create_parents(hdl, zc.zc_value, strlen(tosnap)) != 0) { | |
1810 | zcmd_free_nvlists(&zc); | |
1811 | return (zfs_error(hdl, EZFS_BADRESTORE, errbuf)); | |
1812 | } | |
1813 | ||
1814 | newfs = B_TRUE; | |
1815 | } | |
1816 | ||
1817 | zc.zc_begin_record = drr_noswap->drr_u.drr_begin; | |
1818 | zc.zc_cookie = infd; | |
1819 | zc.zc_guid = flags.force; | |
1820 | if (flags.verbose) { | |
1821 | (void) printf("%s %s stream of %s into %s\n", | |
1822 | flags.dryrun ? "would receive" : "receiving", | |
1823 | drrb->drr_fromguid ? "incremental" : "full", | |
1824 | drrb->drr_toname, zc.zc_value); | |
1825 | (void) fflush(stdout); | |
1826 | } | |
1827 | ||
1828 | if (flags.dryrun) { | |
1829 | zcmd_free_nvlists(&zc); | |
1830 | return (recv_skip(hdl, infd, flags.byteswap)); | |
1831 | } | |
1832 | ||
1833 | err = ioctl_err = zfs_ioctl(hdl, ZFS_IOC_RECV, &zc); | |
1834 | ioctl_errno = errno; | |
b128c09f BB |
1835 | zcmd_free_nvlists(&zc); |
1836 | ||
1837 | if (err == 0 && snapprops_nvlist) { | |
1838 | zfs_cmd_t zc2 = { 0 }; | |
1839 | ||
1840 | (void) strcpy(zc2.zc_name, zc.zc_value); | |
1841 | if (zcmd_write_src_nvlist(hdl, &zc2, snapprops_nvlist) == 0) { | |
1842 | (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc2); | |
1843 | zcmd_free_nvlists(&zc2); | |
1844 | } | |
1845 | } | |
1846 | ||
34dc7c2f BB |
1847 | if (err && (ioctl_errno == ENOENT || ioctl_errno == ENODEV)) { |
1848 | /* | |
1849 | * It may be that this snapshot already exists, | |
1850 | * in which case we want to consume & ignore it | |
1851 | * rather than failing. | |
1852 | */ | |
1853 | avl_tree_t *local_avl; | |
1854 | nvlist_t *local_nv, *fs; | |
1855 | char *cp = strchr(zc.zc_value, '@'); | |
1856 | ||
1857 | /* | |
1858 | * XXX Do this faster by just iterating over snaps in | |
1859 | * this fs. Also if zc_value does not exist, we will | |
1860 | * get a strange "does not exist" error message. | |
1861 | */ | |
1862 | *cp = '\0'; | |
1863 | if (gather_nvlist(hdl, zc.zc_value, NULL, NULL, | |
1864 | &local_nv, &local_avl) == 0) { | |
1865 | *cp = '@'; | |
1866 | fs = fsavl_find(local_avl, drrb->drr_toguid, NULL); | |
1867 | fsavl_destroy(local_avl); | |
1868 | nvlist_free(local_nv); | |
1869 | ||
1870 | if (fs != NULL) { | |
1871 | if (flags.verbose) { | |
1872 | (void) printf("snap %s already exists; " | |
1873 | "ignoring\n", zc.zc_value); | |
1874 | } | |
1875 | ioctl_err = recv_skip(hdl, infd, | |
1876 | flags.byteswap); | |
1877 | } | |
1878 | } | |
1879 | *cp = '@'; | |
1880 | } | |
1881 | ||
34dc7c2f BB |
1882 | |
1883 | if (ioctl_err != 0) { | |
1884 | switch (ioctl_errno) { | |
1885 | case ENODEV: | |
1886 | cp = strchr(zc.zc_value, '@'); | |
1887 | *cp = '\0'; | |
1888 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1889 | "most recent snapshot of %s does not\n" | |
1890 | "match incremental source"), zc.zc_value); | |
1891 | (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
1892 | *cp = '@'; | |
1893 | break; | |
1894 | case ETXTBSY: | |
1895 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1896 | "destination %s has been modified\n" | |
1897 | "since most recent snapshot"), zc.zc_name); | |
1898 | (void) zfs_error(hdl, EZFS_BADRESTORE, errbuf); | |
1899 | break; | |
1900 | case EEXIST: | |
1901 | cp = strchr(zc.zc_value, '@'); | |
1902 | if (newfs) { | |
1903 | /* it's the containing fs that exists */ | |
1904 | *cp = '\0'; | |
1905 | } | |
1906 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1907 | "destination already exists")); | |
1908 | (void) zfs_error_fmt(hdl, EZFS_EXISTS, | |
1909 | dgettext(TEXT_DOMAIN, "cannot restore to %s"), | |
1910 | zc.zc_value); | |
1911 | *cp = '@'; | |
1912 | break; | |
1913 | case EINVAL: | |
1914 | (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
1915 | break; | |
1916 | case ECKSUM: | |
1917 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
1918 | "invalid stream (checksum mismatch)")); | |
1919 | (void) zfs_error(hdl, EZFS_BADSTREAM, errbuf); | |
1920 | break; | |
1921 | default: | |
1922 | (void) zfs_standard_error(hdl, ioctl_errno, errbuf); | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | * Mount or recreate the /dev links for the target filesystem | |
1928 | * (if created, or if we tore them down to do an incremental | |
1929 | * restore), and the /dev links for the new snapshot (if | |
1930 | * created). Also mount any children of the target filesystem | |
1931 | * if we did an incremental receive. | |
1932 | */ | |
1933 | cp = strchr(zc.zc_value, '@'); | |
1934 | if (cp && (ioctl_err == 0 || !newfs)) { | |
1935 | zfs_handle_t *h; | |
1936 | ||
1937 | *cp = '\0'; | |
1938 | h = zfs_open(hdl, zc.zc_value, | |
1939 | ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); | |
34dc7c2f BB |
1940 | if (h != NULL) { |
1941 | if (h->zfs_type == ZFS_TYPE_VOLUME) { | |
b128c09f | 1942 | *cp = '@'; |
34dc7c2f BB |
1943 | err = zvol_create_link(hdl, h->zfs_name); |
1944 | if (err == 0 && ioctl_err == 0) | |
1945 | err = zvol_create_link(hdl, | |
1946 | zc.zc_value); | |
1947 | } else if (newfs) { | |
b128c09f BB |
1948 | /* |
1949 | * Track the first/top of hierarchy fs, | |
1950 | * for mounting and sharing later. | |
1951 | */ | |
1952 | if (top_zfs && *top_zfs == NULL) | |
1953 | *top_zfs = zfs_strdup(hdl, zc.zc_value); | |
34dc7c2f BB |
1954 | } |
1955 | zfs_close(h); | |
1956 | } | |
b128c09f | 1957 | *cp = '@'; |
34dc7c2f BB |
1958 | } |
1959 | ||
1960 | if (clp) { | |
1961 | err |= changelist_postfix(clp); | |
1962 | changelist_free(clp); | |
1963 | } | |
1964 | ||
1965 | if (err || ioctl_err) | |
1966 | return (-1); | |
1967 | ||
1968 | if (flags.verbose) { | |
1969 | char buf1[64]; | |
1970 | char buf2[64]; | |
1971 | uint64_t bytes = zc.zc_cookie; | |
1972 | time_t delta = time(NULL) - begin_time; | |
1973 | if (delta == 0) | |
1974 | delta = 1; | |
1975 | zfs_nicenum(bytes, buf1, sizeof (buf1)); | |
1976 | zfs_nicenum(bytes/delta, buf2, sizeof (buf1)); | |
1977 | ||
1978 | (void) printf("received %sB stream in %lu seconds (%sB/sec)\n", | |
1979 | buf1, delta, buf2); | |
1980 | } | |
1981 | ||
1982 | return (0); | |
1983 | } | |
1984 | ||
b128c09f BB |
1985 | static int |
1986 | zfs_receive_impl(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags, | |
1987 | int infd, avl_tree_t *stream_avl, char **top_zfs) | |
34dc7c2f BB |
1988 | { |
1989 | int err; | |
1990 | dmu_replay_record_t drr, drr_noswap; | |
1991 | struct drr_begin *drrb = &drr.drr_u.drr_begin; | |
1992 | char errbuf[1024]; | |
1993 | zio_cksum_t zcksum = { 0 }; | |
1994 | ||
1995 | (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, | |
1996 | "cannot receive")); | |
1997 | ||
1998 | if (flags.isprefix && | |
1999 | !zfs_dataset_exists(hdl, tosnap, ZFS_TYPE_DATASET)) { | |
2000 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "specified fs " | |
2001 | "(%s) does not exist"), tosnap); | |
2002 | return (zfs_error(hdl, EZFS_NOENT, errbuf)); | |
2003 | } | |
2004 | ||
2005 | /* read in the BEGIN record */ | |
2006 | if (0 != (err = recv_read(hdl, infd, &drr, sizeof (drr), B_FALSE, | |
2007 | &zcksum))) | |
2008 | return (err); | |
2009 | ||
2010 | if (drr.drr_type == DRR_END || drr.drr_type == BSWAP_32(DRR_END)) { | |
2011 | /* It's the double end record at the end of a package */ | |
2012 | return (ENODATA); | |
2013 | } | |
2014 | ||
2015 | /* the kernel needs the non-byteswapped begin record */ | |
2016 | drr_noswap = drr; | |
2017 | ||
2018 | flags.byteswap = B_FALSE; | |
2019 | if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) { | |
2020 | /* | |
2021 | * We computed the checksum in the wrong byteorder in | |
2022 | * recv_read() above; do it again correctly. | |
2023 | */ | |
2024 | bzero(&zcksum, sizeof (zio_cksum_t)); | |
2025 | fletcher_4_incremental_byteswap(&drr, sizeof (drr), &zcksum); | |
2026 | flags.byteswap = B_TRUE; | |
2027 | ||
2028 | drr.drr_type = BSWAP_32(drr.drr_type); | |
2029 | drr.drr_payloadlen = BSWAP_32(drr.drr_payloadlen); | |
2030 | drrb->drr_magic = BSWAP_64(drrb->drr_magic); | |
2031 | drrb->drr_version = BSWAP_64(drrb->drr_version); | |
2032 | drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time); | |
2033 | drrb->drr_type = BSWAP_32(drrb->drr_type); | |
2034 | drrb->drr_flags = BSWAP_32(drrb->drr_flags); | |
2035 | drrb->drr_toguid = BSWAP_64(drrb->drr_toguid); | |
2036 | drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid); | |
2037 | } | |
2038 | ||
2039 | if (drrb->drr_magic != DMU_BACKUP_MAGIC || drr.drr_type != DRR_BEGIN) { | |
2040 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
2041 | "stream (bad magic number)")); | |
2042 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2043 | } | |
2044 | ||
2045 | if (strchr(drrb->drr_toname, '@') == NULL) { | |
2046 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, "invalid " | |
2047 | "stream (bad snapshot name)")); | |
2048 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2049 | } | |
2050 | ||
2051 | if (drrb->drr_version == DMU_BACKUP_STREAM_VERSION) { | |
2052 | return (zfs_receive_one(hdl, infd, tosnap, flags, | |
b128c09f | 2053 | &drr, &drr_noswap, stream_avl, top_zfs)); |
34dc7c2f BB |
2054 | } else if (drrb->drr_version == DMU_BACKUP_HEADER_VERSION) { |
2055 | return (zfs_receive_package(hdl, infd, tosnap, flags, | |
b128c09f | 2056 | &drr, &zcksum, top_zfs)); |
34dc7c2f BB |
2057 | } else { |
2058 | zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2059 | "stream is unsupported version %llu"), | |
2060 | drrb->drr_version); | |
2061 | return (zfs_error(hdl, EZFS_BADSTREAM, errbuf)); | |
2062 | } | |
2063 | } | |
b128c09f BB |
2064 | |
2065 | /* | |
2066 | * Restores a backup of tosnap from the file descriptor specified by infd. | |
2067 | * Return 0 on total success, -2 if some things couldn't be | |
2068 | * destroyed/renamed/promoted, -1 if some things couldn't be received. | |
2069 | * (-1 will override -2). | |
2070 | */ | |
2071 | int | |
2072 | zfs_receive(libzfs_handle_t *hdl, const char *tosnap, recvflags_t flags, | |
2073 | int infd, avl_tree_t *stream_avl) | |
2074 | { | |
2075 | char *top_zfs = NULL; | |
2076 | int err; | |
2077 | ||
2078 | err = zfs_receive_impl(hdl, tosnap, flags, infd, stream_avl, &top_zfs); | |
2079 | ||
2080 | if (err == 0 && top_zfs) { | |
2081 | zfs_handle_t *zhp; | |
2082 | prop_changelist_t *clp; | |
2083 | ||
2084 | zhp = zfs_open(hdl, top_zfs, ZFS_TYPE_FILESYSTEM); | |
2085 | if (zhp != NULL) { | |
2086 | clp = changelist_gather(zhp, ZFS_PROP_MOUNTPOINT, | |
2087 | CL_GATHER_MOUNT_ALWAYS, 0); | |
2088 | zfs_close(zhp); | |
2089 | if (clp != NULL) { | |
2090 | /* mount and share received datasets */ | |
2091 | err = changelist_postfix(clp); | |
2092 | changelist_free(clp); | |
2093 | } | |
2094 | } | |
2095 | if (zhp == NULL || clp == NULL || err) | |
2096 | err = -1; | |
2097 | } | |
2098 | if (top_zfs) | |
2099 | free(top_zfs); | |
2100 | ||
2101 | return (err); | |
2102 | } |