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e89f1295 DB |
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 | * Copyright 2015 Nexenta Systems, Inc. All rights reserved. | |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Copyright (c) 2012, 2018 by Delphix. All rights reserved. | |
25 | * Copyright 2015 RackTop Systems. | |
26 | * Copyright (c) 2016, Intel Corporation. | |
658fb802 | 27 | * Copyright (c) 2021, Colm Buckley <colm@tuatha.org> |
e89f1295 DB |
28 | */ |
29 | ||
30 | /* | |
31 | * Pool import support functions. | |
32 | * | |
33 | * Used by zpool, ztest, zdb, and zhack to locate importable configs. Since | |
34 | * these commands are expected to run in the global zone, we can assume | |
35 | * that the devices are all readable when called. | |
36 | * | |
37 | * To import a pool, we rely on reading the configuration information from the | |
38 | * ZFS label of each device. If we successfully read the label, then we | |
39 | * organize the configuration information in the following hierarchy: | |
40 | * | |
41 | * pool guid -> toplevel vdev guid -> label txg | |
42 | * | |
43 | * Duplicate entries matching this same tuple will be discarded. Once we have | |
44 | * examined every device, we pick the best label txg config for each toplevel | |
45 | * vdev. We then arrange these toplevel vdevs into a complete pool config, and | |
46 | * update any paths that have changed. Finally, we attempt to import the pool | |
47 | * using our derived config, and record the results. | |
48 | */ | |
49 | ||
e50b5217 | 50 | #include <aio.h> |
e89f1295 | 51 | #include <ctype.h> |
e89f1295 DB |
52 | #include <dirent.h> |
53 | #include <errno.h> | |
54 | #include <libintl.h> | |
55 | #include <libgen.h> | |
e89f1295 DB |
56 | #include <stddef.h> |
57 | #include <stdlib.h> | |
58 | #include <string.h> | |
59 | #include <sys/stat.h> | |
60 | #include <unistd.h> | |
61 | #include <fcntl.h> | |
62 | #include <sys/dktp/fdisk.h> | |
63 | #include <sys/vdev_impl.h> | |
64 | #include <sys/fs/zfs.h> | |
e89f1295 | 65 | |
e89f1295 DB |
66 | #include <thread_pool.h> |
67 | #include <libzutil.h> | |
68 | #include <libnvpair.h> | |
69 | ||
7c5eff94 | 70 | #include "zutil_import.h" |
e89f1295 | 71 | |
5dbf6c5a | 72 | static __attribute__((format(printf, 2, 3))) void |
7c5eff94 | 73 | zutil_error_aux(libpc_handle_t *hdl, const char *fmt, ...) |
e89f1295 DB |
74 | { |
75 | va_list ap; | |
76 | ||
77 | va_start(ap, fmt); | |
78 | ||
79 | (void) vsnprintf(hdl->lpc_desc, sizeof (hdl->lpc_desc), fmt, ap); | |
80 | hdl->lpc_desc_active = B_TRUE; | |
81 | ||
82 | va_end(ap); | |
83 | } | |
84 | ||
85 | static void | |
7c5eff94 MM |
86 | zutil_verror(libpc_handle_t *hdl, const char *error, const char *fmt, |
87 | va_list ap) | |
e89f1295 DB |
88 | { |
89 | char action[1024]; | |
90 | ||
91 | (void) vsnprintf(action, sizeof (action), fmt, ap); | |
92 | ||
93 | if (hdl->lpc_desc_active) | |
94 | hdl->lpc_desc_active = B_FALSE; | |
95 | else | |
96 | hdl->lpc_desc[0] = '\0'; | |
97 | ||
98 | if (hdl->lpc_printerr) { | |
99 | if (hdl->lpc_desc[0] != '\0') | |
100 | error = hdl->lpc_desc; | |
101 | ||
102 | (void) fprintf(stderr, "%s: %s\n", action, error); | |
103 | } | |
104 | } | |
105 | ||
5dbf6c5a | 106 | static __attribute__((format(printf, 3, 4))) int |
7c5eff94 | 107 | zutil_error_fmt(libpc_handle_t *hdl, const char *error, const char *fmt, ...) |
e89f1295 DB |
108 | { |
109 | va_list ap; | |
110 | ||
111 | va_start(ap, fmt); | |
112 | ||
7c5eff94 | 113 | zutil_verror(hdl, error, fmt, ap); |
e89f1295 DB |
114 | |
115 | va_end(ap); | |
116 | ||
117 | return (-1); | |
118 | } | |
119 | ||
120 | static int | |
7c5eff94 | 121 | zutil_error(libpc_handle_t *hdl, const char *error, const char *msg) |
e89f1295 | 122 | { |
7c5eff94 | 123 | return (zutil_error_fmt(hdl, error, "%s", msg)); |
e89f1295 DB |
124 | } |
125 | ||
126 | static int | |
7c5eff94 | 127 | zutil_no_memory(libpc_handle_t *hdl) |
e89f1295 | 128 | { |
7c5eff94 | 129 | zutil_error(hdl, EZFS_NOMEM, "internal error"); |
e89f1295 DB |
130 | exit(1); |
131 | } | |
132 | ||
7c5eff94 MM |
133 | void * |
134 | zutil_alloc(libpc_handle_t *hdl, size_t size) | |
e89f1295 DB |
135 | { |
136 | void *data; | |
137 | ||
138 | if ((data = calloc(1, size)) == NULL) | |
7c5eff94 | 139 | (void) zutil_no_memory(hdl); |
e89f1295 DB |
140 | |
141 | return (data); | |
142 | } | |
143 | ||
7c5eff94 MM |
144 | char * |
145 | zutil_strdup(libpc_handle_t *hdl, const char *str) | |
e89f1295 DB |
146 | { |
147 | char *ret; | |
148 | ||
149 | if ((ret = strdup(str)) == NULL) | |
7c5eff94 | 150 | (void) zutil_no_memory(hdl); |
e89f1295 DB |
151 | |
152 | return (ret); | |
153 | } | |
154 | ||
feb04e66 AZ |
155 | static char * |
156 | zutil_strndup(libpc_handle_t *hdl, const char *str, size_t n) | |
157 | { | |
158 | char *ret; | |
159 | ||
160 | if ((ret = strndup(str, n)) == NULL) | |
161 | (void) zutil_no_memory(hdl); | |
162 | ||
163 | return (ret); | |
164 | } | |
165 | ||
e89f1295 DB |
166 | /* |
167 | * Intermediate structures used to gather configuration information. | |
168 | */ | |
169 | typedef struct config_entry { | |
170 | uint64_t ce_txg; | |
171 | nvlist_t *ce_config; | |
172 | struct config_entry *ce_next; | |
173 | } config_entry_t; | |
174 | ||
175 | typedef struct vdev_entry { | |
176 | uint64_t ve_guid; | |
177 | config_entry_t *ve_configs; | |
178 | struct vdev_entry *ve_next; | |
179 | } vdev_entry_t; | |
180 | ||
181 | typedef struct pool_entry { | |
182 | uint64_t pe_guid; | |
183 | vdev_entry_t *pe_vdevs; | |
184 | struct pool_entry *pe_next; | |
185 | } pool_entry_t; | |
186 | ||
187 | typedef struct name_entry { | |
188 | char *ne_name; | |
189 | uint64_t ne_guid; | |
190 | uint64_t ne_order; | |
191 | uint64_t ne_num_labels; | |
192 | struct name_entry *ne_next; | |
193 | } name_entry_t; | |
194 | ||
195 | typedef struct pool_list { | |
196 | pool_entry_t *pools; | |
197 | name_entry_t *names; | |
198 | } pool_list_t; | |
199 | ||
e89f1295 DB |
200 | /* |
201 | * Go through and fix up any path and/or devid information for the given vdev | |
202 | * configuration. | |
203 | */ | |
204 | static int | |
205 | fix_paths(libpc_handle_t *hdl, nvlist_t *nv, name_entry_t *names) | |
206 | { | |
207 | nvlist_t **child; | |
208 | uint_t c, children; | |
209 | uint64_t guid; | |
210 | name_entry_t *ne, *best; | |
211 | char *path; | |
212 | ||
213 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
214 | &child, &children) == 0) { | |
215 | for (c = 0; c < children; c++) | |
216 | if (fix_paths(hdl, child[c], names) != 0) | |
217 | return (-1); | |
218 | return (0); | |
219 | } | |
220 | ||
221 | /* | |
222 | * This is a leaf (file or disk) vdev. In either case, go through | |
223 | * the name list and see if we find a matching guid. If so, replace | |
224 | * the path and see if we can calculate a new devid. | |
225 | * | |
226 | * There may be multiple names associated with a particular guid, in | |
227 | * which case we have overlapping partitions or multiple paths to the | |
228 | * same disk. In this case we prefer to use the path name which | |
229 | * matches the ZPOOL_CONFIG_PATH. If no matching entry is found we | |
230 | * use the lowest order device which corresponds to the first match | |
231 | * while traversing the ZPOOL_IMPORT_PATH search path. | |
232 | */ | |
233 | verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0); | |
234 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) | |
235 | path = NULL; | |
236 | ||
237 | best = NULL; | |
238 | for (ne = names; ne != NULL; ne = ne->ne_next) { | |
239 | if (ne->ne_guid == guid) { | |
240 | if (path == NULL) { | |
241 | best = ne; | |
242 | break; | |
243 | } | |
244 | ||
245 | if ((strlen(path) == strlen(ne->ne_name)) && | |
246 | strncmp(path, ne->ne_name, strlen(path)) == 0) { | |
247 | best = ne; | |
248 | break; | |
249 | } | |
250 | ||
251 | if (best == NULL) { | |
252 | best = ne; | |
253 | continue; | |
254 | } | |
255 | ||
256 | /* Prefer paths with move vdev labels. */ | |
257 | if (ne->ne_num_labels > best->ne_num_labels) { | |
258 | best = ne; | |
259 | continue; | |
260 | } | |
261 | ||
262 | /* Prefer paths earlier in the search order. */ | |
263 | if (ne->ne_num_labels == best->ne_num_labels && | |
264 | ne->ne_order < best->ne_order) { | |
265 | best = ne; | |
266 | continue; | |
267 | } | |
268 | } | |
269 | } | |
270 | ||
271 | if (best == NULL) | |
272 | return (0); | |
273 | ||
274 | if (nvlist_add_string(nv, ZPOOL_CONFIG_PATH, best->ne_name) != 0) | |
275 | return (-1); | |
276 | ||
e89f1295 DB |
277 | update_vdev_config_dev_strs(nv); |
278 | ||
279 | return (0); | |
280 | } | |
281 | ||
282 | /* | |
283 | * Add the given configuration to the list of known devices. | |
284 | */ | |
285 | static int | |
286 | add_config(libpc_handle_t *hdl, pool_list_t *pl, const char *path, | |
287 | int order, int num_labels, nvlist_t *config) | |
288 | { | |
289 | uint64_t pool_guid, vdev_guid, top_guid, txg, state; | |
290 | pool_entry_t *pe; | |
291 | vdev_entry_t *ve; | |
292 | config_entry_t *ce; | |
293 | name_entry_t *ne; | |
294 | ||
295 | /* | |
296 | * If this is a hot spare not currently in use or level 2 cache | |
297 | * device, add it to the list of names to translate, but don't do | |
298 | * anything else. | |
299 | */ | |
300 | if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
301 | &state) == 0 && | |
302 | (state == POOL_STATE_SPARE || state == POOL_STATE_L2CACHE) && | |
303 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid) == 0) { | |
7c5eff94 | 304 | if ((ne = zutil_alloc(hdl, sizeof (name_entry_t))) == NULL) |
e89f1295 DB |
305 | return (-1); |
306 | ||
7c5eff94 | 307 | if ((ne->ne_name = zutil_strdup(hdl, path)) == NULL) { |
e89f1295 DB |
308 | free(ne); |
309 | return (-1); | |
310 | } | |
311 | ne->ne_guid = vdev_guid; | |
312 | ne->ne_order = order; | |
313 | ne->ne_num_labels = num_labels; | |
314 | ne->ne_next = pl->names; | |
315 | pl->names = ne; | |
316 | ||
317 | return (0); | |
318 | } | |
319 | ||
320 | /* | |
321 | * If we have a valid config but cannot read any of these fields, then | |
322 | * it means we have a half-initialized label. In vdev_label_init() | |
323 | * we write a label with txg == 0 so that we can identify the device | |
324 | * in case the user refers to the same disk later on. If we fail to | |
325 | * create the pool, we'll be left with a label in this state | |
326 | * which should not be considered part of a valid pool. | |
327 | */ | |
328 | if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
329 | &pool_guid) != 0 || | |
330 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, | |
331 | &vdev_guid) != 0 || | |
332 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_TOP_GUID, | |
333 | &top_guid) != 0 || | |
334 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, | |
335 | &txg) != 0 || txg == 0) { | |
336 | return (0); | |
337 | } | |
338 | ||
339 | /* | |
340 | * First, see if we know about this pool. If not, then add it to the | |
341 | * list of known pools. | |
342 | */ | |
343 | for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { | |
344 | if (pe->pe_guid == pool_guid) | |
345 | break; | |
346 | } | |
347 | ||
348 | if (pe == NULL) { | |
7c5eff94 | 349 | if ((pe = zutil_alloc(hdl, sizeof (pool_entry_t))) == NULL) { |
e89f1295 DB |
350 | return (-1); |
351 | } | |
352 | pe->pe_guid = pool_guid; | |
353 | pe->pe_next = pl->pools; | |
354 | pl->pools = pe; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Second, see if we know about this toplevel vdev. Add it if its | |
359 | * missing. | |
360 | */ | |
361 | for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { | |
362 | if (ve->ve_guid == top_guid) | |
363 | break; | |
364 | } | |
365 | ||
366 | if (ve == NULL) { | |
7c5eff94 | 367 | if ((ve = zutil_alloc(hdl, sizeof (vdev_entry_t))) == NULL) { |
e89f1295 DB |
368 | return (-1); |
369 | } | |
370 | ve->ve_guid = top_guid; | |
371 | ve->ve_next = pe->pe_vdevs; | |
372 | pe->pe_vdevs = ve; | |
373 | } | |
374 | ||
375 | /* | |
376 | * Third, see if we have a config with a matching transaction group. If | |
377 | * so, then we do nothing. Otherwise, add it to the list of known | |
378 | * configs. | |
379 | */ | |
380 | for (ce = ve->ve_configs; ce != NULL; ce = ce->ce_next) { | |
381 | if (ce->ce_txg == txg) | |
382 | break; | |
383 | } | |
384 | ||
385 | if (ce == NULL) { | |
7c5eff94 | 386 | if ((ce = zutil_alloc(hdl, sizeof (config_entry_t))) == NULL) { |
e89f1295 DB |
387 | return (-1); |
388 | } | |
389 | ce->ce_txg = txg; | |
390 | ce->ce_config = fnvlist_dup(config); | |
391 | ce->ce_next = ve->ve_configs; | |
392 | ve->ve_configs = ce; | |
393 | } | |
394 | ||
395 | /* | |
396 | * At this point we've successfully added our config to the list of | |
397 | * known configs. The last thing to do is add the vdev guid -> path | |
398 | * mappings so that we can fix up the configuration as necessary before | |
399 | * doing the import. | |
400 | */ | |
7c5eff94 | 401 | if ((ne = zutil_alloc(hdl, sizeof (name_entry_t))) == NULL) |
e89f1295 DB |
402 | return (-1); |
403 | ||
7c5eff94 | 404 | if ((ne->ne_name = zutil_strdup(hdl, path)) == NULL) { |
e89f1295 DB |
405 | free(ne); |
406 | return (-1); | |
407 | } | |
408 | ||
409 | ne->ne_guid = vdev_guid; | |
410 | ne->ne_order = order; | |
411 | ne->ne_num_labels = num_labels; | |
412 | ne->ne_next = pl->names; | |
413 | pl->names = ne; | |
414 | ||
415 | return (0); | |
416 | } | |
417 | ||
418 | static int | |
7c5eff94 | 419 | zutil_pool_active(libpc_handle_t *hdl, const char *name, uint64_t guid, |
e89f1295 DB |
420 | boolean_t *isactive) |
421 | { | |
422 | ASSERT(hdl->lpc_ops->pco_pool_active != NULL); | |
423 | ||
424 | int error = hdl->lpc_ops->pco_pool_active(hdl->lpc_lib_handle, name, | |
425 | guid, isactive); | |
426 | ||
427 | return (error); | |
428 | } | |
429 | ||
430 | static nvlist_t * | |
7c5eff94 | 431 | zutil_refresh_config(libpc_handle_t *hdl, nvlist_t *tryconfig) |
e89f1295 DB |
432 | { |
433 | ASSERT(hdl->lpc_ops->pco_refresh_config != NULL); | |
434 | ||
435 | return (hdl->lpc_ops->pco_refresh_config(hdl->lpc_lib_handle, | |
436 | tryconfig)); | |
437 | } | |
438 | ||
439 | /* | |
440 | * Determine if the vdev id is a hole in the namespace. | |
441 | */ | |
442 | static boolean_t | |
443 | vdev_is_hole(uint64_t *hole_array, uint_t holes, uint_t id) | |
444 | { | |
445 | int c; | |
446 | ||
447 | for (c = 0; c < holes; c++) { | |
448 | ||
449 | /* Top-level is a hole */ | |
450 | if (hole_array[c] == id) | |
451 | return (B_TRUE); | |
452 | } | |
453 | return (B_FALSE); | |
454 | } | |
455 | ||
456 | /* | |
457 | * Convert our list of pools into the definitive set of configurations. We | |
458 | * start by picking the best config for each toplevel vdev. Once that's done, | |
459 | * we assemble the toplevel vdevs into a full config for the pool. We make a | |
460 | * pass to fix up any incorrect paths, and then add it to the main list to | |
461 | * return to the user. | |
462 | */ | |
463 | static nvlist_t * | |
464 | get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok, | |
465 | nvlist_t *policy) | |
466 | { | |
467 | pool_entry_t *pe; | |
468 | vdev_entry_t *ve; | |
469 | config_entry_t *ce; | |
470 | nvlist_t *ret = NULL, *config = NULL, *tmp = NULL, *nvtop, *nvroot; | |
471 | nvlist_t **spares, **l2cache; | |
472 | uint_t i, nspares, nl2cache; | |
473 | boolean_t config_seen; | |
474 | uint64_t best_txg; | |
475 | char *name, *hostname = NULL; | |
476 | uint64_t guid; | |
477 | uint_t children = 0; | |
478 | nvlist_t **child = NULL; | |
479 | uint_t holes; | |
480 | uint64_t *hole_array, max_id; | |
481 | uint_t c; | |
482 | boolean_t isactive; | |
483 | uint64_t hostid; | |
484 | nvlist_t *nvl; | |
485 | boolean_t valid_top_config = B_FALSE; | |
486 | ||
487 | if (nvlist_alloc(&ret, 0, 0) != 0) | |
488 | goto nomem; | |
489 | ||
490 | for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { | |
491 | uint64_t id, max_txg = 0; | |
492 | ||
493 | if (nvlist_alloc(&config, NV_UNIQUE_NAME, 0) != 0) | |
494 | goto nomem; | |
495 | config_seen = B_FALSE; | |
496 | ||
497 | /* | |
498 | * Iterate over all toplevel vdevs. Grab the pool configuration | |
499 | * from the first one we find, and then go through the rest and | |
500 | * add them as necessary to the 'vdevs' member of the config. | |
501 | */ | |
502 | for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { | |
503 | ||
504 | /* | |
505 | * Determine the best configuration for this vdev by | |
506 | * selecting the config with the latest transaction | |
507 | * group. | |
508 | */ | |
509 | best_txg = 0; | |
510 | for (ce = ve->ve_configs; ce != NULL; | |
511 | ce = ce->ce_next) { | |
512 | ||
513 | if (ce->ce_txg > best_txg) { | |
514 | tmp = ce->ce_config; | |
515 | best_txg = ce->ce_txg; | |
516 | } | |
517 | } | |
518 | ||
519 | /* | |
520 | * We rely on the fact that the max txg for the | |
521 | * pool will contain the most up-to-date information | |
522 | * about the valid top-levels in the vdev namespace. | |
523 | */ | |
524 | if (best_txg > max_txg) { | |
525 | (void) nvlist_remove(config, | |
526 | ZPOOL_CONFIG_VDEV_CHILDREN, | |
527 | DATA_TYPE_UINT64); | |
528 | (void) nvlist_remove(config, | |
529 | ZPOOL_CONFIG_HOLE_ARRAY, | |
530 | DATA_TYPE_UINT64_ARRAY); | |
531 | ||
532 | max_txg = best_txg; | |
533 | hole_array = NULL; | |
534 | holes = 0; | |
535 | max_id = 0; | |
536 | valid_top_config = B_FALSE; | |
537 | ||
538 | if (nvlist_lookup_uint64(tmp, | |
539 | ZPOOL_CONFIG_VDEV_CHILDREN, &max_id) == 0) { | |
540 | verify(nvlist_add_uint64(config, | |
541 | ZPOOL_CONFIG_VDEV_CHILDREN, | |
542 | max_id) == 0); | |
543 | valid_top_config = B_TRUE; | |
544 | } | |
545 | ||
546 | if (nvlist_lookup_uint64_array(tmp, | |
547 | ZPOOL_CONFIG_HOLE_ARRAY, &hole_array, | |
548 | &holes) == 0) { | |
549 | verify(nvlist_add_uint64_array(config, | |
550 | ZPOOL_CONFIG_HOLE_ARRAY, | |
551 | hole_array, holes) == 0); | |
552 | } | |
553 | } | |
554 | ||
555 | if (!config_seen) { | |
556 | /* | |
557 | * Copy the relevant pieces of data to the pool | |
558 | * configuration: | |
559 | * | |
560 | * version | |
561 | * pool guid | |
562 | * name | |
563 | * comment (if available) | |
658fb802 | 564 | * compatibility features (if available) |
e89f1295 DB |
565 | * pool state |
566 | * hostid (if available) | |
567 | * hostname (if available) | |
568 | */ | |
569 | uint64_t state, version; | |
570 | char *comment = NULL; | |
658fb802 | 571 | char *compatibility = NULL; |
e89f1295 DB |
572 | |
573 | version = fnvlist_lookup_uint64(tmp, | |
574 | ZPOOL_CONFIG_VERSION); | |
575 | fnvlist_add_uint64(config, | |
576 | ZPOOL_CONFIG_VERSION, version); | |
577 | guid = fnvlist_lookup_uint64(tmp, | |
578 | ZPOOL_CONFIG_POOL_GUID); | |
579 | fnvlist_add_uint64(config, | |
580 | ZPOOL_CONFIG_POOL_GUID, guid); | |
581 | name = fnvlist_lookup_string(tmp, | |
582 | ZPOOL_CONFIG_POOL_NAME); | |
583 | fnvlist_add_string(config, | |
584 | ZPOOL_CONFIG_POOL_NAME, name); | |
585 | ||
586 | if (nvlist_lookup_string(tmp, | |
587 | ZPOOL_CONFIG_COMMENT, &comment) == 0) | |
588 | fnvlist_add_string(config, | |
589 | ZPOOL_CONFIG_COMMENT, comment); | |
590 | ||
658fb802 CB |
591 | if (nvlist_lookup_string(tmp, |
592 | ZPOOL_CONFIG_COMPATIBILITY, | |
593 | &compatibility) == 0) | |
594 | fnvlist_add_string(config, | |
595 | ZPOOL_CONFIG_COMPATIBILITY, | |
596 | compatibility); | |
597 | ||
e89f1295 DB |
598 | state = fnvlist_lookup_uint64(tmp, |
599 | ZPOOL_CONFIG_POOL_STATE); | |
600 | fnvlist_add_uint64(config, | |
601 | ZPOOL_CONFIG_POOL_STATE, state); | |
602 | ||
603 | hostid = 0; | |
604 | if (nvlist_lookup_uint64(tmp, | |
605 | ZPOOL_CONFIG_HOSTID, &hostid) == 0) { | |
606 | fnvlist_add_uint64(config, | |
607 | ZPOOL_CONFIG_HOSTID, hostid); | |
608 | hostname = fnvlist_lookup_string(tmp, | |
609 | ZPOOL_CONFIG_HOSTNAME); | |
610 | fnvlist_add_string(config, | |
611 | ZPOOL_CONFIG_HOSTNAME, hostname); | |
612 | } | |
613 | ||
614 | config_seen = B_TRUE; | |
615 | } | |
616 | ||
617 | /* | |
618 | * Add this top-level vdev to the child array. | |
619 | */ | |
620 | verify(nvlist_lookup_nvlist(tmp, | |
621 | ZPOOL_CONFIG_VDEV_TREE, &nvtop) == 0); | |
622 | verify(nvlist_lookup_uint64(nvtop, ZPOOL_CONFIG_ID, | |
623 | &id) == 0); | |
624 | ||
625 | if (id >= children) { | |
626 | nvlist_t **newchild; | |
627 | ||
7c5eff94 | 628 | newchild = zutil_alloc(hdl, (id + 1) * |
e89f1295 DB |
629 | sizeof (nvlist_t *)); |
630 | if (newchild == NULL) | |
631 | goto nomem; | |
632 | ||
633 | for (c = 0; c < children; c++) | |
634 | newchild[c] = child[c]; | |
635 | ||
636 | free(child); | |
637 | child = newchild; | |
638 | children = id + 1; | |
639 | } | |
640 | if (nvlist_dup(nvtop, &child[id], 0) != 0) | |
641 | goto nomem; | |
642 | ||
643 | } | |
644 | ||
645 | /* | |
646 | * If we have information about all the top-levels then | |
647 | * clean up the nvlist which we've constructed. This | |
648 | * means removing any extraneous devices that are | |
649 | * beyond the valid range or adding devices to the end | |
650 | * of our array which appear to be missing. | |
651 | */ | |
652 | if (valid_top_config) { | |
653 | if (max_id < children) { | |
654 | for (c = max_id; c < children; c++) | |
655 | nvlist_free(child[c]); | |
656 | children = max_id; | |
657 | } else if (max_id > children) { | |
658 | nvlist_t **newchild; | |
659 | ||
7c5eff94 | 660 | newchild = zutil_alloc(hdl, (max_id) * |
e89f1295 DB |
661 | sizeof (nvlist_t *)); |
662 | if (newchild == NULL) | |
663 | goto nomem; | |
664 | ||
665 | for (c = 0; c < children; c++) | |
666 | newchild[c] = child[c]; | |
667 | ||
668 | free(child); | |
669 | child = newchild; | |
670 | children = max_id; | |
671 | } | |
672 | } | |
673 | ||
674 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
675 | &guid) == 0); | |
676 | ||
677 | /* | |
678 | * The vdev namespace may contain holes as a result of | |
679 | * device removal. We must add them back into the vdev | |
680 | * tree before we process any missing devices. | |
681 | */ | |
682 | if (holes > 0) { | |
683 | ASSERT(valid_top_config); | |
684 | ||
685 | for (c = 0; c < children; c++) { | |
686 | nvlist_t *holey; | |
687 | ||
688 | if (child[c] != NULL || | |
689 | !vdev_is_hole(hole_array, holes, c)) | |
690 | continue; | |
691 | ||
692 | if (nvlist_alloc(&holey, NV_UNIQUE_NAME, | |
693 | 0) != 0) | |
694 | goto nomem; | |
695 | ||
696 | /* | |
697 | * Holes in the namespace are treated as | |
698 | * "hole" top-level vdevs and have a | |
699 | * special flag set on them. | |
700 | */ | |
701 | if (nvlist_add_string(holey, | |
702 | ZPOOL_CONFIG_TYPE, | |
703 | VDEV_TYPE_HOLE) != 0 || | |
704 | nvlist_add_uint64(holey, | |
705 | ZPOOL_CONFIG_ID, c) != 0 || | |
706 | nvlist_add_uint64(holey, | |
707 | ZPOOL_CONFIG_GUID, 0ULL) != 0) { | |
708 | nvlist_free(holey); | |
709 | goto nomem; | |
710 | } | |
711 | child[c] = holey; | |
712 | } | |
713 | } | |
714 | ||
715 | /* | |
716 | * Look for any missing top-level vdevs. If this is the case, | |
717 | * create a faked up 'missing' vdev as a placeholder. We cannot | |
718 | * simply compress the child array, because the kernel performs | |
719 | * certain checks to make sure the vdev IDs match their location | |
720 | * in the configuration. | |
721 | */ | |
722 | for (c = 0; c < children; c++) { | |
723 | if (child[c] == NULL) { | |
724 | nvlist_t *missing; | |
725 | if (nvlist_alloc(&missing, NV_UNIQUE_NAME, | |
726 | 0) != 0) | |
727 | goto nomem; | |
728 | if (nvlist_add_string(missing, | |
729 | ZPOOL_CONFIG_TYPE, | |
730 | VDEV_TYPE_MISSING) != 0 || | |
731 | nvlist_add_uint64(missing, | |
732 | ZPOOL_CONFIG_ID, c) != 0 || | |
733 | nvlist_add_uint64(missing, | |
734 | ZPOOL_CONFIG_GUID, 0ULL) != 0) { | |
735 | nvlist_free(missing); | |
736 | goto nomem; | |
737 | } | |
738 | child[c] = missing; | |
739 | } | |
740 | } | |
741 | ||
742 | /* | |
743 | * Put all of this pool's top-level vdevs into a root vdev. | |
744 | */ | |
745 | if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) | |
746 | goto nomem; | |
747 | if (nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, | |
748 | VDEV_TYPE_ROOT) != 0 || | |
749 | nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) != 0 || | |
750 | nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, guid) != 0 || | |
751 | nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, | |
795075e6 | 752 | (const nvlist_t **)child, children) != 0) { |
e89f1295 DB |
753 | nvlist_free(nvroot); |
754 | goto nomem; | |
755 | } | |
756 | ||
757 | for (c = 0; c < children; c++) | |
758 | nvlist_free(child[c]); | |
759 | free(child); | |
760 | children = 0; | |
761 | child = NULL; | |
762 | ||
763 | /* | |
764 | * Go through and fix up any paths and/or devids based on our | |
765 | * known list of vdev GUID -> path mappings. | |
766 | */ | |
767 | if (fix_paths(hdl, nvroot, pl->names) != 0) { | |
768 | nvlist_free(nvroot); | |
769 | goto nomem; | |
770 | } | |
771 | ||
772 | /* | |
773 | * Add the root vdev to this pool's configuration. | |
774 | */ | |
775 | if (nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
776 | nvroot) != 0) { | |
777 | nvlist_free(nvroot); | |
778 | goto nomem; | |
779 | } | |
780 | nvlist_free(nvroot); | |
781 | ||
782 | /* | |
783 | * zdb uses this path to report on active pools that were | |
784 | * imported or created using -R. | |
785 | */ | |
786 | if (active_ok) | |
787 | goto add_pool; | |
788 | ||
789 | /* | |
790 | * Determine if this pool is currently active, in which case we | |
791 | * can't actually import it. | |
792 | */ | |
793 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
794 | &name) == 0); | |
795 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
796 | &guid) == 0); | |
797 | ||
7c5eff94 | 798 | if (zutil_pool_active(hdl, name, guid, &isactive) != 0) |
e89f1295 DB |
799 | goto error; |
800 | ||
801 | if (isactive) { | |
802 | nvlist_free(config); | |
803 | config = NULL; | |
804 | continue; | |
805 | } | |
806 | ||
807 | if (policy != NULL) { | |
808 | if (nvlist_add_nvlist(config, ZPOOL_LOAD_POLICY, | |
809 | policy) != 0) | |
810 | goto nomem; | |
811 | } | |
812 | ||
7c5eff94 | 813 | if ((nvl = zutil_refresh_config(hdl, config)) == NULL) { |
e89f1295 DB |
814 | nvlist_free(config); |
815 | config = NULL; | |
816 | continue; | |
817 | } | |
818 | ||
819 | nvlist_free(config); | |
820 | config = nvl; | |
821 | ||
822 | /* | |
823 | * Go through and update the paths for spares, now that we have | |
824 | * them. | |
825 | */ | |
826 | verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
827 | &nvroot) == 0); | |
828 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
829 | &spares, &nspares) == 0) { | |
830 | for (i = 0; i < nspares; i++) { | |
831 | if (fix_paths(hdl, spares[i], pl->names) != 0) | |
832 | goto nomem; | |
833 | } | |
834 | } | |
835 | ||
836 | /* | |
837 | * Update the paths for l2cache devices. | |
838 | */ | |
839 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, | |
840 | &l2cache, &nl2cache) == 0) { | |
841 | for (i = 0; i < nl2cache; i++) { | |
842 | if (fix_paths(hdl, l2cache[i], pl->names) != 0) | |
843 | goto nomem; | |
844 | } | |
845 | } | |
846 | ||
847 | /* | |
848 | * Restore the original information read from the actual label. | |
849 | */ | |
850 | (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTID, | |
851 | DATA_TYPE_UINT64); | |
852 | (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTNAME, | |
853 | DATA_TYPE_STRING); | |
854 | if (hostid != 0) { | |
855 | verify(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, | |
856 | hostid) == 0); | |
857 | verify(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, | |
858 | hostname) == 0); | |
859 | } | |
860 | ||
861 | add_pool: | |
862 | /* | |
863 | * Add this pool to the list of configs. | |
864 | */ | |
865 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
866 | &name) == 0); | |
867 | ||
868 | if (nvlist_add_nvlist(ret, name, config) != 0) | |
869 | goto nomem; | |
870 | ||
871 | nvlist_free(config); | |
872 | config = NULL; | |
873 | } | |
874 | ||
875 | return (ret); | |
876 | ||
877 | nomem: | |
7c5eff94 | 878 | (void) zutil_no_memory(hdl); |
e89f1295 DB |
879 | error: |
880 | nvlist_free(config); | |
881 | nvlist_free(ret); | |
882 | for (c = 0; c < children; c++) | |
883 | nvlist_free(child[c]); | |
884 | free(child); | |
885 | ||
886 | return (NULL); | |
887 | } | |
888 | ||
889 | /* | |
890 | * Return the offset of the given label. | |
891 | */ | |
892 | static uint64_t | |
893 | label_offset(uint64_t size, int l) | |
894 | { | |
895 | ASSERT(P2PHASE_TYPED(size, sizeof (vdev_label_t), uint64_t) == 0); | |
896 | return (l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ? | |
897 | 0 : size - VDEV_LABELS * sizeof (vdev_label_t))); | |
898 | } | |
899 | ||
0bb736ce RE |
900 | /* |
901 | * The same description applies as to zpool_read_label below, | |
902 | * except here we do it without aio, presumably because an aio call | |
903 | * errored out in a way we think not using it could circumvent. | |
904 | */ | |
905 | static int | |
906 | zpool_read_label_slow(int fd, nvlist_t **config, int *num_labels) | |
907 | { | |
908 | struct stat64 statbuf; | |
909 | int l, count = 0; | |
910 | vdev_phys_t *label; | |
911 | nvlist_t *expected_config = NULL; | |
912 | uint64_t expected_guid = 0, size; | |
913 | int error; | |
914 | ||
915 | *config = NULL; | |
916 | ||
917 | if (fstat64_blk(fd, &statbuf) == -1) | |
918 | return (0); | |
919 | size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); | |
920 | ||
921 | error = posix_memalign((void **)&label, PAGESIZE, sizeof (*label)); | |
922 | if (error) | |
923 | return (-1); | |
924 | ||
925 | for (l = 0; l < VDEV_LABELS; l++) { | |
926 | uint64_t state, guid, txg; | |
927 | off_t offset = label_offset(size, l) + VDEV_SKIP_SIZE; | |
928 | ||
929 | if (pread64(fd, label, sizeof (vdev_phys_t), | |
930 | offset) != sizeof (vdev_phys_t)) | |
931 | continue; | |
932 | ||
933 | if (nvlist_unpack(label->vp_nvlist, | |
934 | sizeof (label->vp_nvlist), config, 0) != 0) | |
935 | continue; | |
936 | ||
937 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, | |
938 | &guid) != 0 || guid == 0) { | |
939 | nvlist_free(*config); | |
940 | continue; | |
941 | } | |
942 | ||
943 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, | |
944 | &state) != 0 || state > POOL_STATE_L2CACHE) { | |
945 | nvlist_free(*config); | |
946 | continue; | |
947 | } | |
948 | ||
949 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
950 | (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, | |
951 | &txg) != 0 || txg == 0)) { | |
952 | nvlist_free(*config); | |
953 | continue; | |
954 | } | |
955 | ||
956 | if (expected_guid) { | |
957 | if (expected_guid == guid) | |
958 | count++; | |
959 | ||
960 | nvlist_free(*config); | |
961 | } else { | |
962 | expected_config = *config; | |
963 | expected_guid = guid; | |
964 | count++; | |
965 | } | |
966 | } | |
967 | ||
968 | if (num_labels != NULL) | |
969 | *num_labels = count; | |
970 | ||
971 | free(label); | |
972 | *config = expected_config; | |
973 | ||
974 | return (0); | |
975 | } | |
976 | ||
e89f1295 DB |
977 | /* |
978 | * Given a file descriptor, read the label information and return an nvlist | |
979 | * describing the configuration, if there is one. The number of valid | |
980 | * labels found will be returned in num_labels when non-NULL. | |
981 | */ | |
982 | int | |
983 | zpool_read_label(int fd, nvlist_t **config, int *num_labels) | |
984 | { | |
985 | struct stat64 statbuf; | |
e50b5217 AS |
986 | struct aiocb aiocbs[VDEV_LABELS]; |
987 | struct aiocb *aiocbps[VDEV_LABELS]; | |
988 | vdev_phys_t *labels; | |
e89f1295 DB |
989 | nvlist_t *expected_config = NULL; |
990 | uint64_t expected_guid = 0, size; | |
e50b5217 | 991 | int error, l, count = 0; |
e89f1295 DB |
992 | |
993 | *config = NULL; | |
994 | ||
995 | if (fstat64_blk(fd, &statbuf) == -1) | |
996 | return (0); | |
997 | size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); | |
998 | ||
e50b5217 AS |
999 | error = posix_memalign((void **)&labels, PAGESIZE, |
1000 | VDEV_LABELS * sizeof (*labels)); | |
e89f1295 DB |
1001 | if (error) |
1002 | return (-1); | |
1003 | ||
e50b5217 | 1004 | memset(aiocbs, 0, sizeof (aiocbs)); |
e89f1295 | 1005 | for (l = 0; l < VDEV_LABELS; l++) { |
ec40ce84 | 1006 | off_t offset = label_offset(size, l) + VDEV_SKIP_SIZE; |
e89f1295 | 1007 | |
e50b5217 AS |
1008 | aiocbs[l].aio_fildes = fd; |
1009 | aiocbs[l].aio_offset = offset; | |
1010 | aiocbs[l].aio_buf = &labels[l]; | |
1011 | aiocbs[l].aio_nbytes = sizeof (vdev_phys_t); | |
1012 | aiocbs[l].aio_lio_opcode = LIO_READ; | |
1013 | aiocbps[l] = &aiocbs[l]; | |
1014 | } | |
1015 | ||
1016 | if (lio_listio(LIO_WAIT, aiocbps, VDEV_LABELS, NULL) != 0) { | |
1017 | int saved_errno = errno; | |
0bb736ce RE |
1018 | boolean_t do_slow = B_FALSE; |
1019 | error = -1; | |
e50b5217 AS |
1020 | |
1021 | if (errno == EAGAIN || errno == EINTR || errno == EIO) { | |
1022 | /* | |
1023 | * A portion of the requests may have been submitted. | |
1024 | * Clean them up. | |
1025 | */ | |
1026 | for (l = 0; l < VDEV_LABELS; l++) { | |
1027 | errno = 0; | |
0bb736ce RE |
1028 | switch (aio_error(&aiocbs[l])) { |
1029 | case EINVAL: | |
1030 | break; | |
1031 | case EINPROGRESS: | |
1032 | // This shouldn't be possible to | |
1033 | // encounter, die if we do. | |
1034 | ASSERT(B_FALSE); | |
6954c22f | 1035 | fallthrough; |
0bb736ce RE |
1036 | case EOPNOTSUPP: |
1037 | case ENOSYS: | |
1038 | do_slow = B_TRUE; | |
6954c22f | 1039 | fallthrough; |
0bb736ce RE |
1040 | case 0: |
1041 | default: | |
e50b5217 | 1042 | (void) aio_return(&aiocbs[l]); |
0bb736ce | 1043 | } |
e50b5217 AS |
1044 | } |
1045 | } | |
0bb736ce RE |
1046 | if (do_slow) { |
1047 | /* | |
1048 | * At least some IO involved access unsafe-for-AIO | |
1049 | * files. Let's try again, without AIO this time. | |
1050 | */ | |
1051 | error = zpool_read_label_slow(fd, config, num_labels); | |
1052 | saved_errno = errno; | |
1053 | } | |
e50b5217 AS |
1054 | free(labels); |
1055 | errno = saved_errno; | |
0bb736ce | 1056 | return (error); |
e50b5217 AS |
1057 | } |
1058 | ||
1059 | for (l = 0; l < VDEV_LABELS; l++) { | |
1060 | uint64_t state, guid, txg; | |
1061 | ||
1062 | if (aio_return(&aiocbs[l]) != sizeof (vdev_phys_t)) | |
e89f1295 DB |
1063 | continue; |
1064 | ||
e50b5217 AS |
1065 | if (nvlist_unpack(labels[l].vp_nvlist, |
1066 | sizeof (labels[l].vp_nvlist), config, 0) != 0) | |
e89f1295 DB |
1067 | continue; |
1068 | ||
1069 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, | |
1070 | &guid) != 0 || guid == 0) { | |
1071 | nvlist_free(*config); | |
1072 | continue; | |
1073 | } | |
1074 | ||
1075 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, | |
1076 | &state) != 0 || state > POOL_STATE_L2CACHE) { | |
1077 | nvlist_free(*config); | |
1078 | continue; | |
1079 | } | |
1080 | ||
1081 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
1082 | (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, | |
1083 | &txg) != 0 || txg == 0)) { | |
1084 | nvlist_free(*config); | |
1085 | continue; | |
1086 | } | |
1087 | ||
1088 | if (expected_guid) { | |
1089 | if (expected_guid == guid) | |
1090 | count++; | |
1091 | ||
1092 | nvlist_free(*config); | |
1093 | } else { | |
1094 | expected_config = *config; | |
1095 | expected_guid = guid; | |
1096 | count++; | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | if (num_labels != NULL) | |
1101 | *num_labels = count; | |
1102 | ||
e50b5217 | 1103 | free(labels); |
e89f1295 DB |
1104 | *config = expected_config; |
1105 | ||
1106 | return (0); | |
1107 | } | |
1108 | ||
e89f1295 | 1109 | /* |
47d7ef54 | 1110 | * Sorted by full path and then vdev guid to allow for multiple entries with |
e89f1295 DB |
1111 | * the same full path name. This is required because it's possible to |
1112 | * have multiple block devices with labels that refer to the same | |
1113 | * ZPOOL_CONFIG_PATH yet have different vdev guids. In this case both | |
1114 | * entries need to be added to the cache. Scenarios where this can occur | |
1115 | * include overwritten pool labels, devices which are visible from multiple | |
1116 | * hosts and multipath devices. | |
1117 | */ | |
7c5eff94 | 1118 | int |
e89f1295 DB |
1119 | slice_cache_compare(const void *arg1, const void *arg2) |
1120 | { | |
1121 | const char *nm1 = ((rdsk_node_t *)arg1)->rn_name; | |
1122 | const char *nm2 = ((rdsk_node_t *)arg2)->rn_name; | |
1123 | uint64_t guid1 = ((rdsk_node_t *)arg1)->rn_vdev_guid; | |
1124 | uint64_t guid2 = ((rdsk_node_t *)arg2)->rn_vdev_guid; | |
1125 | int rv; | |
1126 | ||
ca577779 | 1127 | rv = TREE_ISIGN(strcmp(nm1, nm2)); |
e89f1295 DB |
1128 | if (rv) |
1129 | return (rv); | |
1130 | ||
ca577779 | 1131 | return (TREE_CMP(guid1, guid2)); |
e89f1295 DB |
1132 | } |
1133 | ||
e89f1295 DB |
1134 | static int |
1135 | label_paths_impl(libpc_handle_t *hdl, nvlist_t *nvroot, uint64_t pool_guid, | |
1136 | uint64_t vdev_guid, char **path, char **devid) | |
1137 | { | |
1138 | nvlist_t **child; | |
1139 | uint_t c, children; | |
1140 | uint64_t guid; | |
1141 | char *val; | |
1142 | int error; | |
1143 | ||
1144 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, | |
1145 | &child, &children) == 0) { | |
1146 | for (c = 0; c < children; c++) { | |
1147 | error = label_paths_impl(hdl, child[c], | |
1148 | pool_guid, vdev_guid, path, devid); | |
1149 | if (error) | |
1150 | return (error); | |
1151 | } | |
1152 | return (0); | |
1153 | } | |
1154 | ||
1155 | if (nvroot == NULL) | |
1156 | return (0); | |
1157 | ||
1158 | error = nvlist_lookup_uint64(nvroot, ZPOOL_CONFIG_GUID, &guid); | |
1159 | if ((error != 0) || (guid != vdev_guid)) | |
1160 | return (0); | |
1161 | ||
1162 | error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_PATH, &val); | |
1163 | if (error == 0) | |
1164 | *path = val; | |
1165 | ||
1166 | error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_DEVID, &val); | |
1167 | if (error == 0) | |
1168 | *devid = val; | |
1169 | ||
1170 | return (0); | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Given a disk label fetch the ZPOOL_CONFIG_PATH and ZPOOL_CONFIG_DEVID | |
1175 | * and store these strings as config_path and devid_path respectively. | |
1176 | * The returned pointers are only valid as long as label remains valid. | |
1177 | */ | |
7c5eff94 | 1178 | int |
e89f1295 DB |
1179 | label_paths(libpc_handle_t *hdl, nvlist_t *label, char **path, char **devid) |
1180 | { | |
1181 | nvlist_t *nvroot; | |
1182 | uint64_t pool_guid; | |
1183 | uint64_t vdev_guid; | |
1184 | ||
1185 | *path = NULL; | |
1186 | *devid = NULL; | |
1187 | ||
1188 | if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || | |
1189 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &pool_guid) || | |
1190 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &vdev_guid)) | |
1191 | return (ENOENT); | |
1192 | ||
1193 | return (label_paths_impl(hdl, nvroot, pool_guid, vdev_guid, path, | |
1194 | devid)); | |
1195 | } | |
1196 | ||
e89f1295 DB |
1197 | static void |
1198 | zpool_find_import_scan_add_slice(libpc_handle_t *hdl, pthread_mutex_t *lock, | |
1199 | avl_tree_t *cache, const char *path, const char *name, int order) | |
1200 | { | |
1201 | avl_index_t where; | |
1202 | rdsk_node_t *slice; | |
1203 | ||
7c5eff94 | 1204 | slice = zutil_alloc(hdl, sizeof (rdsk_node_t)); |
e89f1295 DB |
1205 | if (asprintf(&slice->rn_name, "%s/%s", path, name) == -1) { |
1206 | free(slice); | |
1207 | return; | |
1208 | } | |
1209 | slice->rn_vdev_guid = 0; | |
1210 | slice->rn_lock = lock; | |
1211 | slice->rn_avl = cache; | |
1212 | slice->rn_hdl = hdl; | |
1213 | slice->rn_order = order + IMPORT_ORDER_SCAN_OFFSET; | |
1214 | slice->rn_labelpaths = B_FALSE; | |
1215 | ||
1216 | pthread_mutex_lock(lock); | |
1217 | if (avl_find(cache, slice, &where)) { | |
1218 | free(slice->rn_name); | |
1219 | free(slice); | |
1220 | } else { | |
1221 | avl_insert(cache, slice, where); | |
1222 | } | |
1223 | pthread_mutex_unlock(lock); | |
1224 | } | |
1225 | ||
1226 | static int | |
1227 | zpool_find_import_scan_dir(libpc_handle_t *hdl, pthread_mutex_t *lock, | |
1228 | avl_tree_t *cache, const char *dir, int order) | |
1229 | { | |
1230 | int error; | |
1231 | char path[MAXPATHLEN]; | |
1232 | struct dirent64 *dp; | |
1233 | DIR *dirp; | |
1234 | ||
1235 | if (realpath(dir, path) == NULL) { | |
1236 | error = errno; | |
1237 | if (error == ENOENT) | |
1238 | return (0); | |
1239 | ||
5dbf6c5a | 1240 | zutil_error_aux(hdl, "%s", strerror(error)); |
7c5eff94 | 1241 | (void) zutil_error_fmt(hdl, EZFS_BADPATH, dgettext( |
e89f1295 DB |
1242 | TEXT_DOMAIN, "cannot resolve path '%s'"), dir); |
1243 | return (error); | |
1244 | } | |
1245 | ||
1246 | dirp = opendir(path); | |
1247 | if (dirp == NULL) { | |
1248 | error = errno; | |
5dbf6c5a | 1249 | zutil_error_aux(hdl, "%s", strerror(error)); |
7c5eff94 | 1250 | (void) zutil_error_fmt(hdl, EZFS_BADPATH, |
e89f1295 DB |
1251 | dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); |
1252 | return (error); | |
1253 | } | |
1254 | ||
1255 | while ((dp = readdir64(dirp)) != NULL) { | |
1256 | const char *name = dp->d_name; | |
64dfdaba | 1257 | if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0) |
e89f1295 DB |
1258 | continue; |
1259 | ||
64dfdaba AZ |
1260 | switch (dp->d_type) { |
1261 | case DT_UNKNOWN: | |
1262 | case DT_BLK: | |
ff317504 | 1263 | case DT_LNK: |
64dfdaba AZ |
1264 | #ifdef __FreeBSD__ |
1265 | case DT_CHR: | |
1266 | #endif | |
1267 | case DT_REG: | |
1268 | break; | |
1269 | default: | |
1270 | continue; | |
1271 | } | |
1272 | ||
e89f1295 DB |
1273 | zpool_find_import_scan_add_slice(hdl, lock, cache, path, name, |
1274 | order); | |
1275 | } | |
1276 | ||
1277 | (void) closedir(dirp); | |
1278 | return (0); | |
1279 | } | |
1280 | ||
1281 | static int | |
1282 | zpool_find_import_scan_path(libpc_handle_t *hdl, pthread_mutex_t *lock, | |
1283 | avl_tree_t *cache, const char *dir, int order) | |
1284 | { | |
1285 | int error = 0; | |
1286 | char path[MAXPATHLEN]; | |
feb04e66 AZ |
1287 | char *d = NULL; |
1288 | ssize_t dl; | |
1289 | const char *dpath, *name; | |
e89f1295 DB |
1290 | |
1291 | /* | |
feb04e66 AZ |
1292 | * Separate the directory and the basename. |
1293 | * We do this so that we can get the realpath of | |
e89f1295 DB |
1294 | * the directory. We don't get the realpath on the |
1295 | * whole path because if it's a symlink, we want the | |
1296 | * path of the symlink not where it points to. | |
1297 | */ | |
feb04e66 AZ |
1298 | name = zfs_basename(dir); |
1299 | if ((dl = zfs_dirnamelen(dir)) == -1) | |
1300 | dpath = "."; | |
1301 | else | |
1302 | dpath = d = zutil_strndup(hdl, dir, dl); | |
e89f1295 DB |
1303 | |
1304 | if (realpath(dpath, path) == NULL) { | |
1305 | error = errno; | |
1306 | if (error == ENOENT) { | |
1307 | error = 0; | |
1308 | goto out; | |
1309 | } | |
1310 | ||
5dbf6c5a | 1311 | zutil_error_aux(hdl, "%s", strerror(error)); |
7c5eff94 | 1312 | (void) zutil_error_fmt(hdl, EZFS_BADPATH, dgettext( |
e89f1295 DB |
1313 | TEXT_DOMAIN, "cannot resolve path '%s'"), dir); |
1314 | goto out; | |
1315 | } | |
1316 | ||
1317 | zpool_find_import_scan_add_slice(hdl, lock, cache, path, name, order); | |
1318 | ||
1319 | out: | |
e89f1295 DB |
1320 | free(d); |
1321 | return (error); | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Scan a list of directories for zfs devices. | |
1326 | */ | |
1327 | static int | |
1328 | zpool_find_import_scan(libpc_handle_t *hdl, pthread_mutex_t *lock, | |
7c5eff94 | 1329 | avl_tree_t **slice_cache, const char * const *dir, size_t dirs) |
e89f1295 DB |
1330 | { |
1331 | avl_tree_t *cache; | |
1332 | rdsk_node_t *slice; | |
1333 | void *cookie; | |
1334 | int i, error; | |
1335 | ||
1336 | *slice_cache = NULL; | |
7c5eff94 | 1337 | cache = zutil_alloc(hdl, sizeof (avl_tree_t)); |
e89f1295 DB |
1338 | avl_create(cache, slice_cache_compare, sizeof (rdsk_node_t), |
1339 | offsetof(rdsk_node_t, rn_node)); | |
1340 | ||
1341 | for (i = 0; i < dirs; i++) { | |
1342 | struct stat sbuf; | |
1343 | ||
1344 | if (stat(dir[i], &sbuf) != 0) { | |
1345 | error = errno; | |
1346 | if (error == ENOENT) | |
1347 | continue; | |
1348 | ||
5dbf6c5a | 1349 | zutil_error_aux(hdl, "%s", strerror(error)); |
7c5eff94 | 1350 | (void) zutil_error_fmt(hdl, EZFS_BADPATH, dgettext( |
e89f1295 DB |
1351 | TEXT_DOMAIN, "cannot resolve path '%s'"), dir[i]); |
1352 | goto error; | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * If dir[i] is a directory, we walk through it and add all | |
7c5eff94 | 1357 | * the entries to the cache. If it's not a directory, we just |
e89f1295 DB |
1358 | * add it to the cache. |
1359 | */ | |
1360 | if (S_ISDIR(sbuf.st_mode)) { | |
1361 | if ((error = zpool_find_import_scan_dir(hdl, lock, | |
1362 | cache, dir[i], i)) != 0) | |
1363 | goto error; | |
1364 | } else { | |
1365 | if ((error = zpool_find_import_scan_path(hdl, lock, | |
1366 | cache, dir[i], i)) != 0) | |
1367 | goto error; | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | *slice_cache = cache; | |
1372 | return (0); | |
1373 | ||
1374 | error: | |
1375 | cookie = NULL; | |
1376 | while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { | |
1377 | free(slice->rn_name); | |
1378 | free(slice); | |
1379 | } | |
1380 | free(cache); | |
1381 | ||
1382 | return (error); | |
1383 | } | |
1384 | ||
e89f1295 DB |
1385 | /* |
1386 | * Given a list of directories to search, find all pools stored on disk. This | |
1387 | * includes partial pools which are not available to import. If no args are | |
1388 | * given (argc is 0), then the default directory (/dev/dsk) is searched. | |
1389 | * poolname or guid (but not both) are provided by the caller when trying | |
1390 | * to import a specific pool. | |
1391 | */ | |
1392 | static nvlist_t * | |
0936981d GW |
1393 | zpool_find_import_impl(libpc_handle_t *hdl, importargs_t *iarg, |
1394 | pthread_mutex_t *lock, avl_tree_t *cache) | |
e89f1295 DB |
1395 | { |
1396 | nvlist_t *ret = NULL; | |
1397 | pool_list_t pools = { 0 }; | |
1398 | pool_entry_t *pe, *penext; | |
1399 | vdev_entry_t *ve, *venext; | |
1400 | config_entry_t *ce, *cenext; | |
1401 | name_entry_t *ne, *nenext; | |
e89f1295 DB |
1402 | rdsk_node_t *slice; |
1403 | void *cookie; | |
1404 | tpool_t *t; | |
1405 | ||
1406 | verify(iarg->poolname == NULL || iarg->guid == 0); | |
e89f1295 DB |
1407 | |
1408 | /* | |
1409 | * Create a thread pool to parallelize the process of reading and | |
1410 | * validating labels, a large number of threads can be used due to | |
1411 | * minimal contention. | |
1412 | */ | |
1413 | t = tpool_create(1, 2 * sysconf(_SC_NPROCESSORS_ONLN), 0, NULL); | |
1414 | for (slice = avl_first(cache); slice; | |
1415 | (slice = avl_walk(cache, slice, AVL_AFTER))) | |
1416 | (void) tpool_dispatch(t, zpool_open_func, slice); | |
1417 | ||
1418 | tpool_wait(t); | |
1419 | tpool_destroy(t); | |
1420 | ||
1421 | /* | |
78595377 AG |
1422 | * Process the cache, filtering out any entries which are not |
1423 | * for the specified pool then adding matching label configs. | |
e89f1295 DB |
1424 | */ |
1425 | cookie = NULL; | |
1426 | while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { | |
1427 | if (slice->rn_config != NULL) { | |
1428 | nvlist_t *config = slice->rn_config; | |
1429 | boolean_t matched = B_TRUE; | |
1430 | boolean_t aux = B_FALSE; | |
1431 | int fd; | |
1432 | ||
1433 | /* | |
1434 | * Check if it's a spare or l2cache device. If it is, | |
1435 | * we need to skip the name and guid check since they | |
1436 | * don't exist on aux device label. | |
1437 | */ | |
1438 | if (iarg->poolname != NULL || iarg->guid != 0) { | |
1439 | uint64_t state; | |
1440 | aux = nvlist_lookup_uint64(config, | |
1441 | ZPOOL_CONFIG_POOL_STATE, &state) == 0 && | |
1442 | (state == POOL_STATE_SPARE || | |
1443 | state == POOL_STATE_L2CACHE); | |
1444 | } | |
1445 | ||
1446 | if (iarg->poolname != NULL && !aux) { | |
1447 | char *pname; | |
1448 | ||
1449 | matched = nvlist_lookup_string(config, | |
1450 | ZPOOL_CONFIG_POOL_NAME, &pname) == 0 && | |
1451 | strcmp(iarg->poolname, pname) == 0; | |
1452 | } else if (iarg->guid != 0 && !aux) { | |
1453 | uint64_t this_guid; | |
1454 | ||
1455 | matched = nvlist_lookup_uint64(config, | |
1456 | ZPOOL_CONFIG_POOL_GUID, &this_guid) == 0 && | |
1457 | iarg->guid == this_guid; | |
1458 | } | |
1459 | if (matched) { | |
1460 | /* | |
1461 | * Verify all remaining entries can be opened | |
1462 | * exclusively. This will prune all underlying | |
1463 | * multipath devices which otherwise could | |
1464 | * result in the vdev appearing as UNAVAIL. | |
1465 | * | |
1466 | * Under zdb, this step isn't required and | |
1467 | * would prevent a zdb -e of active pools with | |
1468 | * no cachefile. | |
1469 | */ | |
10b575d0 AZ |
1470 | fd = open(slice->rn_name, |
1471 | O_RDONLY | O_EXCL | O_CLOEXEC); | |
e89f1295 DB |
1472 | if (fd >= 0 || iarg->can_be_active) { |
1473 | if (fd >= 0) | |
1474 | close(fd); | |
1475 | add_config(hdl, &pools, | |
1476 | slice->rn_name, slice->rn_order, | |
1477 | slice->rn_num_labels, config); | |
1478 | } | |
1479 | } | |
1480 | nvlist_free(config); | |
1481 | } | |
1482 | free(slice->rn_name); | |
1483 | free(slice); | |
1484 | } | |
1485 | avl_destroy(cache); | |
1486 | free(cache); | |
e89f1295 DB |
1487 | |
1488 | ret = get_configs(hdl, &pools, iarg->can_be_active, iarg->policy); | |
1489 | ||
1490 | for (pe = pools.pools; pe != NULL; pe = penext) { | |
1491 | penext = pe->pe_next; | |
1492 | for (ve = pe->pe_vdevs; ve != NULL; ve = venext) { | |
1493 | venext = ve->ve_next; | |
1494 | for (ce = ve->ve_configs; ce != NULL; ce = cenext) { | |
1495 | cenext = ce->ce_next; | |
1496 | nvlist_free(ce->ce_config); | |
1497 | free(ce); | |
1498 | } | |
1499 | free(ve); | |
1500 | } | |
1501 | free(pe); | |
1502 | } | |
1503 | ||
1504 | for (ne = pools.names; ne != NULL; ne = nenext) { | |
1505 | nenext = ne->ne_next; | |
1506 | free(ne->ne_name); | |
1507 | free(ne); | |
1508 | } | |
1509 | ||
1510 | return (ret); | |
1511 | } | |
1512 | ||
0936981d GW |
1513 | /* |
1514 | * Given a config, discover the paths for the devices which | |
1515 | * exist in the config. | |
1516 | */ | |
1517 | static int | |
1518 | discover_cached_paths(libpc_handle_t *hdl, nvlist_t *nv, | |
1519 | avl_tree_t *cache, pthread_mutex_t *lock) | |
1520 | { | |
1521 | char *path = NULL; | |
feb04e66 | 1522 | ssize_t dl; |
0936981d GW |
1523 | uint_t children; |
1524 | nvlist_t **child; | |
1525 | ||
1526 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
1527 | &child, &children) == 0) { | |
1528 | for (int c = 0; c < children; c++) { | |
1529 | discover_cached_paths(hdl, child[c], cache, lock); | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * Once we have the path, we need to add the directory to | |
bf169e9f | 1535 | * our directory cache. |
0936981d GW |
1536 | */ |
1537 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0) { | |
feb04e66 AZ |
1538 | if ((dl = zfs_dirnamelen(path)) == -1) |
1539 | path = "."; | |
1540 | else | |
1541 | path[dl] = '\0'; | |
0936981d | 1542 | return (zpool_find_import_scan_dir(hdl, lock, cache, |
feb04e66 | 1543 | path, 0)); |
0936981d GW |
1544 | } |
1545 | return (0); | |
1546 | } | |
1547 | ||
e89f1295 DB |
1548 | /* |
1549 | * Given a cache file, return the contents as a list of importable pools. | |
1550 | * poolname or guid (but not both) are provided by the caller when trying | |
1551 | * to import a specific pool. | |
1552 | */ | |
1553 | static nvlist_t * | |
0936981d | 1554 | zpool_find_import_cached(libpc_handle_t *hdl, importargs_t *iarg) |
e89f1295 DB |
1555 | { |
1556 | char *buf; | |
1557 | int fd; | |
1558 | struct stat64 statbuf; | |
1559 | nvlist_t *raw, *src, *dst; | |
1560 | nvlist_t *pools; | |
1561 | nvpair_t *elem; | |
1562 | char *name; | |
1563 | uint64_t this_guid; | |
1564 | boolean_t active; | |
1565 | ||
0936981d | 1566 | verify(iarg->poolname == NULL || iarg->guid == 0); |
e89f1295 | 1567 | |
10b575d0 | 1568 | if ((fd = open(iarg->cachefile, O_RDONLY | O_CLOEXEC)) < 0) { |
7c5eff94 MM |
1569 | zutil_error_aux(hdl, "%s", strerror(errno)); |
1570 | (void) zutil_error(hdl, EZFS_BADCACHE, | |
e89f1295 DB |
1571 | dgettext(TEXT_DOMAIN, "failed to open cache file")); |
1572 | return (NULL); | |
1573 | } | |
1574 | ||
1575 | if (fstat64(fd, &statbuf) != 0) { | |
7c5eff94 | 1576 | zutil_error_aux(hdl, "%s", strerror(errno)); |
e89f1295 | 1577 | (void) close(fd); |
7c5eff94 | 1578 | (void) zutil_error(hdl, EZFS_BADCACHE, |
e89f1295 DB |
1579 | dgettext(TEXT_DOMAIN, "failed to get size of cache file")); |
1580 | return (NULL); | |
1581 | } | |
1582 | ||
7c5eff94 | 1583 | if ((buf = zutil_alloc(hdl, statbuf.st_size)) == NULL) { |
e89f1295 DB |
1584 | (void) close(fd); |
1585 | return (NULL); | |
1586 | } | |
1587 | ||
1588 | if (read(fd, buf, statbuf.st_size) != statbuf.st_size) { | |
1589 | (void) close(fd); | |
1590 | free(buf); | |
7c5eff94 | 1591 | (void) zutil_error(hdl, EZFS_BADCACHE, |
e89f1295 DB |
1592 | dgettext(TEXT_DOMAIN, |
1593 | "failed to read cache file contents")); | |
1594 | return (NULL); | |
1595 | } | |
1596 | ||
1597 | (void) close(fd); | |
1598 | ||
1599 | if (nvlist_unpack(buf, statbuf.st_size, &raw, 0) != 0) { | |
1600 | free(buf); | |
7c5eff94 | 1601 | (void) zutil_error(hdl, EZFS_BADCACHE, |
e89f1295 DB |
1602 | dgettext(TEXT_DOMAIN, |
1603 | "invalid or corrupt cache file contents")); | |
1604 | return (NULL); | |
1605 | } | |
1606 | ||
1607 | free(buf); | |
1608 | ||
1609 | /* | |
1610 | * Go through and get the current state of the pools and refresh their | |
1611 | * state. | |
1612 | */ | |
1613 | if (nvlist_alloc(&pools, 0, 0) != 0) { | |
7c5eff94 | 1614 | (void) zutil_no_memory(hdl); |
e89f1295 DB |
1615 | nvlist_free(raw); |
1616 | return (NULL); | |
1617 | } | |
1618 | ||
1619 | elem = NULL; | |
1620 | while ((elem = nvlist_next_nvpair(raw, elem)) != NULL) { | |
1621 | src = fnvpair_value_nvlist(elem); | |
1622 | ||
1623 | name = fnvlist_lookup_string(src, ZPOOL_CONFIG_POOL_NAME); | |
0936981d | 1624 | if (iarg->poolname != NULL && strcmp(iarg->poolname, name) != 0) |
e89f1295 DB |
1625 | continue; |
1626 | ||
1627 | this_guid = fnvlist_lookup_uint64(src, ZPOOL_CONFIG_POOL_GUID); | |
0936981d | 1628 | if (iarg->guid != 0 && iarg->guid != this_guid) |
e89f1295 DB |
1629 | continue; |
1630 | ||
7c5eff94 | 1631 | if (zutil_pool_active(hdl, name, this_guid, &active) != 0) { |
e89f1295 DB |
1632 | nvlist_free(raw); |
1633 | nvlist_free(pools); | |
1634 | return (NULL); | |
1635 | } | |
1636 | ||
1637 | if (active) | |
1638 | continue; | |
1639 | ||
0936981d GW |
1640 | if (iarg->scan) { |
1641 | uint64_t saved_guid = iarg->guid; | |
1642 | const char *saved_poolname = iarg->poolname; | |
1643 | pthread_mutex_t lock; | |
1644 | ||
1645 | /* | |
1646 | * Create the device cache that will hold the | |
1647 | * devices we will scan based on the cachefile. | |
1648 | * This will get destroyed and freed by | |
1649 | * zpool_find_import_impl. | |
1650 | */ | |
1651 | avl_tree_t *cache = zutil_alloc(hdl, | |
1652 | sizeof (avl_tree_t)); | |
1653 | avl_create(cache, slice_cache_compare, | |
1654 | sizeof (rdsk_node_t), | |
1655 | offsetof(rdsk_node_t, rn_node)); | |
1656 | nvlist_t *nvroot = fnvlist_lookup_nvlist(src, | |
1657 | ZPOOL_CONFIG_VDEV_TREE); | |
1658 | ||
1659 | /* | |
1660 | * We only want to find the pool with this_guid. | |
1661 | * We will reset these values back later. | |
1662 | */ | |
1663 | iarg->guid = this_guid; | |
1664 | iarg->poolname = NULL; | |
1665 | ||
1666 | /* | |
1667 | * We need to build up a cache of devices that exists | |
1668 | * in the paths pointed to by the cachefile. This allows | |
1669 | * us to preserve the device namespace that was | |
1670 | * originally specified by the user but also lets us | |
1671 | * scan devices in those directories in case they had | |
1672 | * been renamed. | |
1673 | */ | |
1674 | pthread_mutex_init(&lock, NULL); | |
1675 | discover_cached_paths(hdl, nvroot, cache, &lock); | |
1676 | nvlist_t *nv = zpool_find_import_impl(hdl, iarg, | |
1677 | &lock, cache); | |
1678 | pthread_mutex_destroy(&lock); | |
1679 | ||
1680 | /* | |
1681 | * zpool_find_import_impl will return back | |
1682 | * a list of pools that it found based on the | |
1683 | * device cache. There should only be one pool | |
1684 | * since we're looking for a specific guid. | |
1685 | * We will use that pool to build up the final | |
1686 | * pool nvlist which is returned back to the | |
1687 | * caller. | |
1688 | */ | |
1689 | nvpair_t *pair = nvlist_next_nvpair(nv, NULL); | |
1690 | fnvlist_add_nvlist(pools, nvpair_name(pair), | |
1691 | fnvpair_value_nvlist(pair)); | |
1692 | ||
1693 | VERIFY3P(nvlist_next_nvpair(nv, pair), ==, NULL); | |
1694 | ||
1695 | iarg->guid = saved_guid; | |
1696 | iarg->poolname = saved_poolname; | |
1697 | continue; | |
1698 | } | |
1699 | ||
e89f1295 | 1700 | if (nvlist_add_string(src, ZPOOL_CONFIG_CACHEFILE, |
0936981d | 1701 | iarg->cachefile) != 0) { |
7c5eff94 | 1702 | (void) zutil_no_memory(hdl); |
e89f1295 DB |
1703 | nvlist_free(raw); |
1704 | nvlist_free(pools); | |
1705 | return (NULL); | |
1706 | } | |
1707 | ||
2a8430a2 TH |
1708 | update_vdevs_config_dev_sysfs_path(src); |
1709 | ||
7c5eff94 | 1710 | if ((dst = zutil_refresh_config(hdl, src)) == NULL) { |
e89f1295 DB |
1711 | nvlist_free(raw); |
1712 | nvlist_free(pools); | |
1713 | return (NULL); | |
1714 | } | |
1715 | ||
1716 | if (nvlist_add_nvlist(pools, nvpair_name(elem), dst) != 0) { | |
7c5eff94 | 1717 | (void) zutil_no_memory(hdl); |
e89f1295 DB |
1718 | nvlist_free(dst); |
1719 | nvlist_free(raw); | |
1720 | nvlist_free(pools); | |
1721 | return (NULL); | |
1722 | } | |
1723 | nvlist_free(dst); | |
1724 | } | |
e89f1295 DB |
1725 | nvlist_free(raw); |
1726 | return (pools); | |
1727 | } | |
1728 | ||
0936981d GW |
1729 | static nvlist_t * |
1730 | zpool_find_import(libpc_handle_t *hdl, importargs_t *iarg) | |
1731 | { | |
1732 | pthread_mutex_t lock; | |
1733 | avl_tree_t *cache; | |
1734 | nvlist_t *pools = NULL; | |
1735 | ||
1736 | verify(iarg->poolname == NULL || iarg->guid == 0); | |
1737 | pthread_mutex_init(&lock, NULL); | |
1738 | ||
1739 | /* | |
1740 | * Locate pool member vdevs by blkid or by directory scanning. | |
1741 | * On success a newly allocated AVL tree which is populated with an | |
1742 | * entry for each discovered vdev will be returned in the cache. | |
1743 | * It's the caller's responsibility to consume and destroy this tree. | |
1744 | */ | |
1745 | if (iarg->scan || iarg->paths != 0) { | |
1746 | size_t dirs = iarg->paths; | |
1747 | const char * const *dir = (const char * const *)iarg->path; | |
1748 | ||
1749 | if (dirs == 0) | |
1750 | dir = zpool_default_search_paths(&dirs); | |
1751 | ||
1752 | if (zpool_find_import_scan(hdl, &lock, &cache, | |
1753 | dir, dirs) != 0) { | |
1754 | pthread_mutex_destroy(&lock); | |
1755 | return (NULL); | |
1756 | } | |
1757 | } else { | |
1758 | if (zpool_find_import_blkid(hdl, &lock, &cache) != 0) { | |
1759 | pthread_mutex_destroy(&lock); | |
1760 | return (NULL); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | pools = zpool_find_import_impl(hdl, iarg, &lock, cache); | |
1765 | pthread_mutex_destroy(&lock); | |
1766 | return (pools); | |
1767 | } | |
1768 | ||
1769 | ||
e89f1295 DB |
1770 | nvlist_t * |
1771 | zpool_search_import(void *hdl, importargs_t *import, | |
1772 | const pool_config_ops_t *pco) | |
1773 | { | |
1774 | libpc_handle_t handle = { 0 }; | |
1775 | nvlist_t *pools = NULL; | |
1776 | ||
1777 | handle.lpc_lib_handle = hdl; | |
1778 | handle.lpc_ops = pco; | |
1779 | handle.lpc_printerr = B_TRUE; | |
1780 | ||
1781 | verify(import->poolname == NULL || import->guid == 0); | |
1782 | ||
1783 | if (import->cachefile != NULL) | |
0936981d | 1784 | pools = zpool_find_import_cached(&handle, import); |
e89f1295 | 1785 | else |
0936981d | 1786 | pools = zpool_find_import(&handle, import); |
e89f1295 DB |
1787 | |
1788 | if ((pools == NULL || nvlist_empty(pools)) && | |
1789 | handle.lpc_open_access_error && geteuid() != 0) { | |
7c5eff94 | 1790 | (void) zutil_error(&handle, EZFS_EACESS, dgettext(TEXT_DOMAIN, |
e89f1295 DB |
1791 | "no pools found")); |
1792 | } | |
1793 | ||
1794 | return (pools); | |
1795 | } | |
1796 | ||
1797 | static boolean_t | |
1798 | pool_match(nvlist_t *cfg, char *tgt) | |
1799 | { | |
1800 | uint64_t v, guid = strtoull(tgt, NULL, 0); | |
1801 | char *s; | |
1802 | ||
1803 | if (guid != 0) { | |
1804 | if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0) | |
1805 | return (v == guid); | |
1806 | } else { | |
1807 | if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0) | |
1808 | return (strcmp(s, tgt) == 0); | |
1809 | } | |
1810 | return (B_FALSE); | |
1811 | } | |
1812 | ||
1813 | int | |
1814 | zpool_find_config(void *hdl, const char *target, nvlist_t **configp, | |
1815 | importargs_t *args, const pool_config_ops_t *pco) | |
1816 | { | |
1817 | nvlist_t *pools; | |
1818 | nvlist_t *match = NULL; | |
1819 | nvlist_t *config = NULL; | |
b6722b87 | 1820 | char *sepp = NULL; |
e89f1295 DB |
1821 | int count = 0; |
1822 | char *targetdup = strdup(target); | |
1823 | ||
1824 | *configp = NULL; | |
1825 | ||
77f3b675 | 1826 | if ((sepp = strpbrk(targetdup, "/@")) != NULL) |
e89f1295 | 1827 | *sepp = '\0'; |
e89f1295 DB |
1828 | |
1829 | pools = zpool_search_import(hdl, args, pco); | |
1830 | ||
1831 | if (pools != NULL) { | |
1832 | nvpair_t *elem = NULL; | |
1833 | while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) { | |
1834 | VERIFY0(nvpair_value_nvlist(elem, &config)); | |
1835 | if (pool_match(config, targetdup)) { | |
1836 | count++; | |
1837 | if (match != NULL) { | |
1838 | /* multiple matches found */ | |
1839 | continue; | |
1840 | } else { | |
b6722b87 | 1841 | match = fnvlist_dup(config); |
e89f1295 DB |
1842 | } |
1843 | } | |
1844 | } | |
b6722b87 | 1845 | fnvlist_free(pools); |
e89f1295 DB |
1846 | } |
1847 | ||
1848 | if (count == 0) { | |
1849 | free(targetdup); | |
1850 | return (ENOENT); | |
1851 | } | |
1852 | ||
1853 | if (count > 1) { | |
1854 | free(targetdup); | |
b6722b87 | 1855 | fnvlist_free(match); |
e89f1295 DB |
1856 | return (EINVAL); |
1857 | } | |
1858 | ||
1859 | *configp = match; | |
1860 | free(targetdup); | |
1861 | ||
1862 | return (0); | |
1863 | } | |
2a8430a2 TH |
1864 | |
1865 | /* | |
1866 | * Internal function for iterating over the vdevs. | |
1867 | * | |
1868 | * For each vdev, func() will be called and will be passed 'zhp' (which is | |
1869 | * typically the zpool_handle_t cast as a void pointer), the vdev's nvlist, and | |
1870 | * a user-defined data pointer). | |
1871 | * | |
1872 | * The return values from all the func() calls will be OR'd together and | |
1873 | * returned. | |
1874 | */ | |
1875 | int | |
1876 | for_each_vdev_cb(void *zhp, nvlist_t *nv, pool_vdev_iter_f func, | |
1877 | void *data) | |
1878 | { | |
1879 | nvlist_t **child; | |
1880 | uint_t c, children; | |
1881 | int ret = 0; | |
1882 | int i; | |
1883 | char *type; | |
1884 | ||
1885 | const char *list[] = { | |
1886 | ZPOOL_CONFIG_SPARES, | |
1887 | ZPOOL_CONFIG_L2CACHE, | |
1888 | ZPOOL_CONFIG_CHILDREN | |
1889 | }; | |
1890 | ||
2a673e76 AJ |
1891 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) |
1892 | return (ret); | |
1893 | ||
1894 | /* Don't run our function on root or indirect vdevs */ | |
1895 | if ((strcmp(type, VDEV_TYPE_ROOT) != 0) && | |
1896 | (strcmp(type, VDEV_TYPE_INDIRECT) != 0)) { | |
1897 | ret |= func(zhp, nv, data); | |
1898 | } | |
1899 | ||
2a8430a2 TH |
1900 | for (i = 0; i < ARRAY_SIZE(list); i++) { |
1901 | if (nvlist_lookup_nvlist_array(nv, list[i], &child, | |
1902 | &children) == 0) { | |
1903 | for (c = 0; c < children; c++) { | |
1904 | uint64_t ishole = 0; | |
1905 | ||
1906 | (void) nvlist_lookup_uint64(child[c], | |
1907 | ZPOOL_CONFIG_IS_HOLE, &ishole); | |
1908 | ||
1909 | if (ishole) | |
1910 | continue; | |
1911 | ||
1912 | ret |= for_each_vdev_cb(zhp, child[c], | |
1913 | func, data); | |
1914 | } | |
1915 | } | |
1916 | } | |
1917 | ||
2a8430a2 TH |
1918 | return (ret); |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * Given an ZPOOL_CONFIG_VDEV_TREE nvpair, iterate over all the vdevs, calling | |
1923 | * func() for each one. func() is passed the vdev's nvlist and an optional | |
1924 | * user-defined 'data' pointer. | |
1925 | */ | |
1926 | int | |
1927 | for_each_vdev_in_nvlist(nvlist_t *nvroot, pool_vdev_iter_f func, void *data) | |
1928 | { | |
1929 | return (for_each_vdev_cb(NULL, nvroot, func, data)); | |
1930 | } |