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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 | /* | |
cae5b340 | 22 | * Copyright 2015 Nexenta Systems, Inc. All rights reserved. |
572e2857 | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
cae5b340 AX |
24 | * Copyright (c) 2012, 2016 by Delphix. All rights reserved. |
25 | * Copyright 2015 RackTop Systems. | |
26 | * Copyright (c) 2016, Intel Corporation. | |
34dc7c2f BB |
27 | */ |
28 | ||
34dc7c2f BB |
29 | /* |
30 | * Pool import support functions. | |
31 | * | |
32 | * To import a pool, we rely on reading the configuration information from the | |
33 | * ZFS label of each device. If we successfully read the label, then we | |
34 | * organize the configuration information in the following hierarchy: | |
35 | * | |
36 | * pool guid -> toplevel vdev guid -> label txg | |
37 | * | |
38 | * Duplicate entries matching this same tuple will be discarded. Once we have | |
39 | * examined every device, we pick the best label txg config for each toplevel | |
40 | * vdev. We then arrange these toplevel vdevs into a complete pool config, and | |
41 | * update any paths that have changed. Finally, we attempt to import the pool | |
42 | * using our derived config, and record the results. | |
43 | */ | |
44 | ||
428870ff | 45 | #include <ctype.h> |
34dc7c2f BB |
46 | #include <devid.h> |
47 | #include <dirent.h> | |
48 | #include <errno.h> | |
49 | #include <libintl.h> | |
cae5b340 AX |
50 | #ifdef HAVE_LIBUDEV |
51 | #include <libudev.h> | |
52 | #include <sched.h> | |
53 | #endif | |
428870ff | 54 | #include <stddef.h> |
34dc7c2f BB |
55 | #include <stdlib.h> |
56 | #include <string.h> | |
57 | #include <sys/stat.h> | |
58 | #include <unistd.h> | |
59 | #include <fcntl.h> | |
428870ff BB |
60 | #include <sys/vtoc.h> |
61 | #include <sys/dktp/fdisk.h> | |
62 | #include <sys/efi_partition.h> | |
34dc7c2f | 63 | #include <sys/vdev_impl.h> |
d603ed6c | 64 | #include <blkid/blkid.h> |
34dc7c2f BB |
65 | #include "libzfs.h" |
66 | #include "libzfs_impl.h" | |
cae5b340 | 67 | #include <libzfs.h> |
34dc7c2f BB |
68 | |
69 | /* | |
70 | * Intermediate structures used to gather configuration information. | |
71 | */ | |
72 | typedef struct config_entry { | |
73 | uint64_t ce_txg; | |
74 | nvlist_t *ce_config; | |
75 | struct config_entry *ce_next; | |
76 | } config_entry_t; | |
77 | ||
78 | typedef struct vdev_entry { | |
79 | uint64_t ve_guid; | |
80 | config_entry_t *ve_configs; | |
81 | struct vdev_entry *ve_next; | |
82 | } vdev_entry_t; | |
83 | ||
84 | typedef struct pool_entry { | |
85 | uint64_t pe_guid; | |
86 | vdev_entry_t *pe_vdevs; | |
87 | struct pool_entry *pe_next; | |
88 | } pool_entry_t; | |
89 | ||
90 | typedef struct name_entry { | |
91 | char *ne_name; | |
92 | uint64_t ne_guid; | |
44867b6d | 93 | uint64_t ne_order; |
ea04106b | 94 | uint64_t ne_num_labels; |
34dc7c2f BB |
95 | struct name_entry *ne_next; |
96 | } name_entry_t; | |
97 | ||
98 | typedef struct pool_list { | |
99 | pool_entry_t *pools; | |
100 | name_entry_t *names; | |
101 | } pool_list_t; | |
102 | ||
5eacc075 AX |
103 | #define DEV_BYID_PATH "/dev/disk/by-id/" |
104 | ||
cae5b340 AX |
105 | /* |
106 | * Linux persistent device strings for vdev labels | |
107 | * | |
108 | * based on libudev for consistency with libudev disk add/remove events | |
109 | */ | |
110 | #ifdef HAVE_LIBUDEV | |
111 | ||
112 | typedef struct vdev_dev_strs { | |
113 | char vds_devid[128]; | |
114 | char vds_devphys[128]; | |
115 | } vdev_dev_strs_t; | |
116 | ||
117 | /* | |
118 | * Obtain the persistent device id string (describes what) | |
119 | * | |
120 | * used by ZED vdev matching for auto-{online,expand,replace} | |
121 | */ | |
122 | int | |
123 | zfs_device_get_devid(struct udev_device *dev, char *bufptr, size_t buflen) | |
34dc7c2f | 124 | { |
cae5b340 AX |
125 | struct udev_list_entry *entry; |
126 | const char *bus; | |
127 | char devbyid[MAXPATHLEN]; | |
34dc7c2f | 128 | |
cae5b340 AX |
129 | /* The bus based by-id path is preferred */ |
130 | bus = udev_device_get_property_value(dev, "ID_BUS"); | |
131 | ||
132 | if (bus == NULL) { | |
133 | const char *dm_uuid; | |
34dc7c2f | 134 | |
cae5b340 AX |
135 | /* |
136 | * For multipath nodes use the persistent uuid based identifier | |
137 | * | |
138 | * Example: /dev/disk/by-id/dm-uuid-mpath-35000c5006304de3f | |
139 | */ | |
140 | dm_uuid = udev_device_get_property_value(dev, "DM_UUID"); | |
141 | if (dm_uuid != NULL) { | |
142 | (void) snprintf(bufptr, buflen, "dm-uuid-%s", dm_uuid); | |
143 | return (0); | |
144 | } | |
145 | return (ENODATA); | |
34dc7c2f | 146 | } |
cae5b340 AX |
147 | |
148 | /* | |
149 | * locate the bus specific by-id link | |
150 | */ | |
151 | (void) snprintf(devbyid, sizeof (devbyid), "%s%s-", DEV_BYID_PATH, bus); | |
152 | entry = udev_device_get_devlinks_list_entry(dev); | |
153 | while (entry != NULL) { | |
154 | const char *name; | |
155 | ||
156 | name = udev_list_entry_get_name(entry); | |
157 | if (strncmp(name, devbyid, strlen(devbyid)) == 0) { | |
158 | name += strlen(DEV_BYID_PATH); | |
159 | (void) strlcpy(bufptr, name, buflen); | |
160 | return (0); | |
161 | } | |
162 | entry = udev_list_entry_get_next(entry); | |
163 | } | |
164 | ||
165 | return (ENODATA); | |
166 | } | |
167 | ||
168 | /* | |
169 | * Obtain the persistent physical location string (describes where) | |
170 | * | |
171 | * used by ZED vdev matching for auto-{online,expand,replace} | |
172 | */ | |
173 | int | |
174 | zfs_device_get_physical(struct udev_device *dev, char *bufptr, size_t buflen) | |
175 | { | |
176 | const char *physpath = NULL; | |
177 | ||
178 | /* | |
179 | * Normal disks use ID_PATH for their physical path. Device mapper | |
180 | * devices are virtual and don't have a physical path. For them we | |
181 | * use ID_VDEV instead, which is setup via the /etc/vdev_id.conf file. | |
182 | * ID_VDEV provides a persistent path to a virtual device. If you | |
183 | * don't have vdev_id.conf setup, you cannot use multipath autoreplace. | |
184 | */ | |
185 | if (!((physpath = udev_device_get_property_value(dev, "ID_PATH")) && | |
186 | physpath[0])) { | |
187 | if (!((physpath = | |
188 | udev_device_get_property_value(dev, "ID_VDEV")) && | |
189 | physpath[0])) { | |
190 | return (ENODATA); | |
191 | } | |
192 | } | |
193 | ||
194 | (void) strlcpy(bufptr, physpath, buflen); | |
195 | ||
196 | return (0); | |
197 | } | |
198 | ||
199 | boolean_t | |
200 | udev_is_mpath(struct udev_device *dev) | |
201 | { | |
202 | return udev_device_get_property_value(dev, "DM_UUID") && | |
203 | udev_device_get_property_value(dev, "MPATH_SBIN_PATH"); | |
204 | } | |
205 | ||
206 | /* | |
207 | * A disk is considered a multipath whole disk when: | |
208 | * DEVNAME key value has "dm-" | |
209 | * DM_NAME key value has "mpath" prefix | |
210 | * DM_UUID key exists | |
211 | * ID_PART_TABLE_TYPE key does not exist or is not gpt | |
212 | */ | |
213 | static boolean_t | |
214 | udev_mpath_whole_disk(struct udev_device *dev) | |
215 | { | |
216 | const char *devname, *type, *uuid; | |
217 | ||
218 | devname = udev_device_get_property_value(dev, "DEVNAME"); | |
219 | type = udev_device_get_property_value(dev, "ID_PART_TABLE_TYPE"); | |
220 | uuid = udev_device_get_property_value(dev, "DM_UUID"); | |
221 | ||
222 | if ((devname != NULL && strncmp(devname, "/dev/dm-", 8) == 0) && | |
223 | ((type == NULL) || (strcmp(type, "gpt") != 0)) && | |
224 | (uuid != NULL)) { | |
225 | return (B_TRUE); | |
226 | } | |
227 | ||
228 | return (B_FALSE); | |
229 | } | |
230 | ||
231 | /* | |
232 | * Check if a disk is effectively a multipath whole disk | |
233 | */ | |
234 | boolean_t | |
235 | is_mpath_whole_disk(const char *path) | |
236 | { | |
237 | struct udev *udev; | |
238 | struct udev_device *dev = NULL; | |
239 | char nodepath[MAXPATHLEN]; | |
240 | char *sysname; | |
241 | boolean_t wholedisk = B_FALSE; | |
242 | ||
243 | if (realpath(path, nodepath) == NULL) | |
244 | return (B_FALSE); | |
245 | sysname = strrchr(nodepath, '/') + 1; | |
246 | if (strncmp(sysname, "dm-", 3) != 0) | |
247 | return (B_FALSE); | |
248 | if ((udev = udev_new()) == NULL) | |
249 | return (B_FALSE); | |
250 | if ((dev = udev_device_new_from_subsystem_sysname(udev, "block", | |
251 | sysname)) == NULL) { | |
252 | udev_device_unref(dev); | |
253 | return (B_FALSE); | |
254 | } | |
255 | ||
256 | wholedisk = udev_mpath_whole_disk(dev); | |
257 | ||
258 | udev_device_unref(dev); | |
259 | return (wholedisk); | |
260 | } | |
261 | ||
262 | static int | |
263 | udev_device_is_ready(struct udev_device *dev) | |
264 | { | |
265 | #ifdef HAVE_LIBUDEV_UDEV_DEVICE_GET_IS_INITIALIZED | |
266 | return (udev_device_get_is_initialized(dev)); | |
267 | #else | |
268 | /* wait for DEVLINKS property to be initialized */ | |
269 | return (udev_device_get_property_value(dev, "DEVLINKS") != NULL); | |
270 | #endif | |
271 | } | |
272 | ||
273 | /* | |
274 | * Wait up to timeout_ms for udev to set up the device node. The device is | |
275 | * considered ready when libudev determines it has been initialized, all of | |
276 | * the device links have been verified to exist, and it has been allowed to | |
277 | * settle. At this point the device the device can be accessed reliably. | |
278 | * Depending on the complexity of the udev rules this process could take | |
279 | * several seconds. | |
280 | */ | |
281 | int | |
282 | zpool_label_disk_wait(char *path, int timeout_ms) | |
283 | { | |
284 | struct udev *udev; | |
285 | struct udev_device *dev = NULL; | |
286 | char nodepath[MAXPATHLEN]; | |
287 | char *sysname = NULL; | |
288 | int ret = ENODEV; | |
289 | int settle_ms = 50; | |
290 | long sleep_ms = 10; | |
291 | hrtime_t start, settle; | |
292 | ||
293 | if ((udev = udev_new()) == NULL) | |
294 | return (ENXIO); | |
295 | ||
296 | start = gethrtime(); | |
297 | settle = 0; | |
298 | ||
299 | do { | |
300 | if (sysname == NULL) { | |
301 | if (realpath(path, nodepath) != NULL) { | |
302 | sysname = strrchr(nodepath, '/') + 1; | |
303 | } else { | |
304 | (void) usleep(sleep_ms * MILLISEC); | |
305 | continue; | |
306 | } | |
307 | } | |
308 | ||
309 | dev = udev_device_new_from_subsystem_sysname(udev, | |
310 | "block", sysname); | |
311 | if ((dev != NULL) && udev_device_is_ready(dev)) { | |
047218e2 | 312 | struct udev_list_entry *links, *link = NULL; |
cae5b340 AX |
313 | |
314 | ret = 0; | |
315 | links = udev_device_get_devlinks_list_entry(dev); | |
316 | ||
317 | udev_list_entry_foreach(link, links) { | |
318 | struct stat64 statbuf; | |
319 | const char *name; | |
320 | ||
321 | name = udev_list_entry_get_name(link); | |
322 | errno = 0; | |
323 | if (stat64(name, &statbuf) == 0 && errno == 0) | |
324 | continue; | |
325 | ||
326 | settle = 0; | |
327 | ret = ENODEV; | |
328 | break; | |
329 | } | |
330 | ||
331 | if (ret == 0) { | |
332 | if (settle == 0) { | |
333 | settle = gethrtime(); | |
334 | } else if (NSEC2MSEC(gethrtime() - settle) >= | |
335 | settle_ms) { | |
336 | udev_device_unref(dev); | |
337 | break; | |
338 | } | |
339 | } | |
340 | } | |
341 | ||
342 | udev_device_unref(dev); | |
343 | (void) usleep(sleep_ms * MILLISEC); | |
344 | ||
345 | } while (NSEC2MSEC(gethrtime() - start) < timeout_ms); | |
346 | ||
347 | udev_unref(udev); | |
348 | ||
349 | return (ret); | |
350 | } | |
351 | ||
352 | ||
353 | /* | |
354 | * Encode the persistent devices strings | |
355 | * used for the vdev disk label | |
356 | */ | |
357 | static int | |
358 | encode_device_strings(const char *path, vdev_dev_strs_t *ds, | |
359 | boolean_t wholedisk) | |
360 | { | |
361 | struct udev *udev; | |
362 | struct udev_device *dev = NULL; | |
363 | char nodepath[MAXPATHLEN]; | |
364 | char *sysname; | |
365 | int ret = ENODEV; | |
366 | hrtime_t start; | |
367 | ||
368 | if ((udev = udev_new()) == NULL) | |
369 | return (ENXIO); | |
370 | ||
371 | /* resolve path to a runtime device node instance */ | |
372 | if (realpath(path, nodepath) == NULL) | |
373 | goto no_dev; | |
374 | ||
375 | sysname = strrchr(nodepath, '/') + 1; | |
376 | ||
377 | /* | |
378 | * Wait up to 3 seconds for udev to set up the device node context | |
379 | */ | |
380 | start = gethrtime(); | |
381 | do { | |
382 | dev = udev_device_new_from_subsystem_sysname(udev, "block", | |
383 | sysname); | |
384 | if (dev == NULL) | |
385 | goto no_dev; | |
386 | if (udev_device_is_ready(dev)) | |
387 | break; /* udev ready */ | |
388 | ||
389 | udev_device_unref(dev); | |
390 | dev = NULL; | |
391 | ||
392 | if (NSEC2MSEC(gethrtime() - start) < 10) | |
393 | (void) sched_yield(); /* yield/busy wait up to 10ms */ | |
394 | else | |
395 | (void) usleep(10 * MILLISEC); | |
396 | ||
397 | } while (NSEC2MSEC(gethrtime() - start) < (3 * MILLISEC)); | |
398 | ||
399 | if (dev == NULL) | |
400 | goto no_dev; | |
401 | ||
402 | /* | |
403 | * Only whole disks require extra device strings | |
404 | */ | |
405 | if (!wholedisk && !udev_mpath_whole_disk(dev)) | |
406 | goto no_dev; | |
407 | ||
408 | ret = zfs_device_get_devid(dev, ds->vds_devid, sizeof (ds->vds_devid)); | |
409 | if (ret != 0) | |
410 | goto no_dev_ref; | |
411 | ||
412 | /* physical location string (optional) */ | |
413 | if (zfs_device_get_physical(dev, ds->vds_devphys, | |
414 | sizeof (ds->vds_devphys)) != 0) { | |
415 | ds->vds_devphys[0] = '\0'; /* empty string --> not available */ | |
416 | } | |
417 | ||
418 | no_dev_ref: | |
419 | udev_device_unref(dev); | |
420 | no_dev: | |
421 | udev_unref(udev); | |
34dc7c2f BB |
422 | |
423 | return (ret); | |
424 | } | |
425 | ||
cae5b340 AX |
426 | /* |
427 | * Update a leaf vdev's persistent device strings (Linux only) | |
428 | * | |
429 | * - only applies for a dedicated leaf vdev (aka whole disk) | |
430 | * - updated during pool create|add|attach|import | |
431 | * - used for matching device matching during auto-{online,expand,replace} | |
432 | * - stored in a leaf disk config label (i.e. alongside 'path' NVP) | |
433 | * - these strings are currently not used in kernel (i.e. for vdev_disk_open) | |
434 | * | |
435 | * single device node example: | |
436 | * devid: 'scsi-MG03SCA300_350000494a8cb3d67-part1' | |
437 | * phys_path: 'pci-0000:04:00.0-sas-0x50000394a8cb3d67-lun-0' | |
438 | * | |
439 | * multipath device node example: | |
440 | * devid: 'dm-uuid-mpath-35000c5006304de3f' | |
441 | * | |
442 | * We also store the enclosure sysfs path for turning on enclosure LEDs | |
443 | * (if applicable): | |
444 | * vdev_enc_sysfs_path: '/sys/class/enclosure/11:0:1:0/SLOT 4' | |
445 | */ | |
446 | void | |
447 | update_vdev_config_dev_strs(nvlist_t *nv) | |
448 | { | |
449 | vdev_dev_strs_t vds; | |
450 | char *env, *type, *path; | |
451 | uint64_t wholedisk = 0; | |
452 | char *upath, *spath; | |
453 | ||
454 | /* | |
455 | * For the benefit of legacy ZFS implementations, allow | |
456 | * for opting out of devid strings in the vdev label. | |
457 | * | |
458 | * example use: | |
459 | * env ZFS_VDEV_DEVID_OPT_OUT=YES zpool import dozer | |
460 | * | |
461 | * explanation: | |
462 | * Older ZFS on Linux implementations had issues when attempting to | |
463 | * display pool config VDEV names if a "devid" NVP value is present | |
464 | * in the pool's config. | |
465 | * | |
466 | * For example, a pool that originated on illumos platform would | |
467 | * have a devid value in the config and "zpool status" would fail | |
468 | * when listing the config. | |
469 | * | |
470 | * A pool can be stripped of any "devid" values on import or | |
471 | * prevented from adding them on zpool create|add by setting | |
472 | * ZFS_VDEV_DEVID_OPT_OUT. | |
473 | */ | |
474 | env = getenv("ZFS_VDEV_DEVID_OPT_OUT"); | |
475 | if (env && (strtoul(env, NULL, 0) > 0 || | |
476 | !strncasecmp(env, "YES", 3) || !strncasecmp(env, "ON", 2))) { | |
477 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_DEVID); | |
478 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_PHYS_PATH); | |
479 | return; | |
480 | } | |
481 | ||
482 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0 || | |
483 | strcmp(type, VDEV_TYPE_DISK) != 0) { | |
484 | return; | |
485 | } | |
486 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) | |
487 | return; | |
488 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, &wholedisk); | |
489 | ||
490 | /* | |
491 | * Update device string values in config nvlist | |
492 | */ | |
493 | if (encode_device_strings(path, &vds, (boolean_t)wholedisk) == 0) { | |
494 | (void) nvlist_add_string(nv, ZPOOL_CONFIG_DEVID, vds.vds_devid); | |
495 | if (vds.vds_devphys[0] != '\0') { | |
496 | (void) nvlist_add_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
497 | vds.vds_devphys); | |
498 | } | |
499 | ||
500 | /* Add enclosure sysfs path (if disk is in an enclosure) */ | |
501 | upath = zfs_get_underlying_path(path); | |
502 | spath = zfs_get_enclosure_sysfs_path(upath); | |
503 | if (spath) | |
504 | nvlist_add_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, | |
505 | spath); | |
506 | else | |
507 | nvlist_remove_all(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH); | |
508 | ||
509 | free(upath); | |
510 | free(spath); | |
511 | } else { | |
512 | /* clear out any stale entries */ | |
513 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_DEVID); | |
514 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_PHYS_PATH); | |
515 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH); | |
516 | } | |
517 | } | |
518 | #else | |
519 | ||
520 | boolean_t | |
521 | is_mpath_whole_disk(const char *path) | |
522 | { | |
523 | return (B_FALSE); | |
524 | } | |
525 | ||
5eacc075 AX |
526 | /* |
527 | * Wait up to timeout_ms for udev to set up the device node. The device is | |
528 | * considered ready when the provided path have been verified to exist and | |
529 | * it has been allowed to settle. At this point the device the device can | |
530 | * be accessed reliably. Depending on the complexity of the udev rules thisi | |
531 | * process could take several seconds. | |
532 | */ | |
533 | int | |
534 | zpool_label_disk_wait(char *path, int timeout_ms) | |
535 | { | |
536 | int settle_ms = 50; | |
537 | long sleep_ms = 10; | |
538 | hrtime_t start, settle; | |
539 | struct stat64 statbuf; | |
540 | ||
541 | start = gethrtime(); | |
542 | settle = 0; | |
543 | ||
544 | do { | |
545 | errno = 0; | |
546 | if ((stat64(path, &statbuf) == 0) && (errno == 0)) { | |
547 | if (settle == 0) | |
548 | settle = gethrtime(); | |
549 | else if (NSEC2MSEC(gethrtime() - settle) >= settle_ms) | |
550 | return (0); | |
551 | } else if (errno != ENOENT) { | |
552 | return (errno); | |
553 | } | |
554 | ||
555 | usleep(sleep_ms * MILLISEC); | |
556 | } while (NSEC2MSEC(gethrtime() - start) < timeout_ms); | |
557 | ||
558 | return (ENODEV); | |
559 | } | |
34dc7c2f | 560 | |
cae5b340 AX |
561 | void |
562 | update_vdev_config_dev_strs(nvlist_t *nv) | |
563 | { | |
564 | } | |
565 | ||
566 | #endif /* HAVE_LIBUDEV */ | |
567 | ||
34dc7c2f BB |
568 | /* |
569 | * Go through and fix up any path and/or devid information for the given vdev | |
570 | * configuration. | |
571 | */ | |
572 | static int | |
573 | fix_paths(nvlist_t *nv, name_entry_t *names) | |
574 | { | |
575 | nvlist_t **child; | |
576 | uint_t c, children; | |
577 | uint64_t guid; | |
578 | name_entry_t *ne, *best; | |
cae5b340 | 579 | char *path; |
34dc7c2f BB |
580 | |
581 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
582 | &child, &children) == 0) { | |
583 | for (c = 0; c < children; c++) | |
584 | if (fix_paths(child[c], names) != 0) | |
585 | return (-1); | |
586 | return (0); | |
587 | } | |
588 | ||
589 | /* | |
590 | * This is a leaf (file or disk) vdev. In either case, go through | |
591 | * the name list and see if we find a matching guid. If so, replace | |
592 | * the path and see if we can calculate a new devid. | |
593 | * | |
594 | * There may be multiple names associated with a particular guid, in | |
44867b6d BB |
595 | * which case we have overlapping partitions or multiple paths to the |
596 | * same disk. In this case we prefer to use the path name which | |
597 | * matches the ZPOOL_CONFIG_PATH. If no matching entry is found we | |
598 | * use the lowest order device which corresponds to the first match | |
599 | * while traversing the ZPOOL_IMPORT_PATH search path. | |
34dc7c2f BB |
600 | */ |
601 | verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0); | |
602 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) | |
603 | path = NULL; | |
604 | ||
34dc7c2f BB |
605 | best = NULL; |
606 | for (ne = names; ne != NULL; ne = ne->ne_next) { | |
607 | if (ne->ne_guid == guid) { | |
34dc7c2f BB |
608 | if (path == NULL) { |
609 | best = ne; | |
610 | break; | |
611 | } | |
612 | ||
44867b6d | 613 | if ((strlen(path) == strlen(ne->ne_name)) && |
a08ee875 | 614 | strncmp(path, ne->ne_name, strlen(path)) == 0) { |
34dc7c2f | 615 | best = ne; |
44867b6d | 616 | break; |
34dc7c2f | 617 | } |
44867b6d | 618 | |
ea04106b | 619 | if (best == NULL) { |
44867b6d | 620 | best = ne; |
ea04106b AX |
621 | continue; |
622 | } | |
623 | ||
624 | /* Prefer paths with move vdev labels. */ | |
625 | if (ne->ne_num_labels > best->ne_num_labels) { | |
626 | best = ne; | |
627 | continue; | |
628 | } | |
629 | ||
630 | /* Prefer paths earlier in the search order. */ | |
87dac73d | 631 | if (ne->ne_num_labels == best->ne_num_labels && |
ea04106b AX |
632 | ne->ne_order < best->ne_order) { |
633 | best = ne; | |
634 | continue; | |
635 | } | |
34dc7c2f BB |
636 | } |
637 | } | |
638 | ||
639 | if (best == NULL) | |
640 | return (0); | |
641 | ||
642 | if (nvlist_add_string(nv, ZPOOL_CONFIG_PATH, best->ne_name) != 0) | |
643 | return (-1); | |
644 | ||
cae5b340 AX |
645 | /* Linux only - update ZPOOL_CONFIG_DEVID and ZPOOL_CONFIG_PHYS_PATH */ |
646 | update_vdev_config_dev_strs(nv); | |
34dc7c2f BB |
647 | |
648 | return (0); | |
649 | } | |
650 | ||
651 | /* | |
652 | * Add the given configuration to the list of known devices. | |
653 | */ | |
654 | static int | |
655 | add_config(libzfs_handle_t *hdl, pool_list_t *pl, const char *path, | |
ea04106b | 656 | int order, int num_labels, nvlist_t *config) |
34dc7c2f BB |
657 | { |
658 | uint64_t pool_guid, vdev_guid, top_guid, txg, state; | |
659 | pool_entry_t *pe; | |
660 | vdev_entry_t *ve; | |
661 | config_entry_t *ce; | |
662 | name_entry_t *ne; | |
663 | ||
664 | /* | |
665 | * If this is a hot spare not currently in use or level 2 cache | |
666 | * device, add it to the list of names to translate, but don't do | |
667 | * anything else. | |
668 | */ | |
669 | if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
670 | &state) == 0 && | |
671 | (state == POOL_STATE_SPARE || state == POOL_STATE_L2CACHE) && | |
672 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid) == 0) { | |
cae5b340 AX |
673 | if ((ne = zfs_alloc(hdl, sizeof (name_entry_t))) == NULL) { |
674 | nvlist_free(config); | |
34dc7c2f | 675 | return (-1); |
cae5b340 | 676 | } |
34dc7c2f BB |
677 | |
678 | if ((ne->ne_name = zfs_strdup(hdl, path)) == NULL) { | |
679 | free(ne); | |
cae5b340 | 680 | nvlist_free(config); |
34dc7c2f BB |
681 | return (-1); |
682 | } | |
683 | ne->ne_guid = vdev_guid; | |
44867b6d | 684 | ne->ne_order = order; |
ea04106b | 685 | ne->ne_num_labels = num_labels; |
34dc7c2f BB |
686 | ne->ne_next = pl->names; |
687 | pl->names = ne; | |
cae5b340 | 688 | nvlist_free(config); |
34dc7c2f BB |
689 | return (0); |
690 | } | |
691 | ||
692 | /* | |
693 | * If we have a valid config but cannot read any of these fields, then | |
694 | * it means we have a half-initialized label. In vdev_label_init() | |
695 | * we write a label with txg == 0 so that we can identify the device | |
696 | * in case the user refers to the same disk later on. If we fail to | |
697 | * create the pool, we'll be left with a label in this state | |
698 | * which should not be considered part of a valid pool. | |
699 | */ | |
700 | if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
701 | &pool_guid) != 0 || | |
702 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, | |
703 | &vdev_guid) != 0 || | |
704 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_TOP_GUID, | |
705 | &top_guid) != 0 || | |
706 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, | |
707 | &txg) != 0 || txg == 0) { | |
708 | nvlist_free(config); | |
709 | return (0); | |
710 | } | |
711 | ||
712 | /* | |
713 | * First, see if we know about this pool. If not, then add it to the | |
714 | * list of known pools. | |
715 | */ | |
716 | for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { | |
717 | if (pe->pe_guid == pool_guid) | |
718 | break; | |
719 | } | |
720 | ||
721 | if (pe == NULL) { | |
722 | if ((pe = zfs_alloc(hdl, sizeof (pool_entry_t))) == NULL) { | |
723 | nvlist_free(config); | |
724 | return (-1); | |
725 | } | |
726 | pe->pe_guid = pool_guid; | |
727 | pe->pe_next = pl->pools; | |
728 | pl->pools = pe; | |
729 | } | |
730 | ||
731 | /* | |
732 | * Second, see if we know about this toplevel vdev. Add it if its | |
733 | * missing. | |
734 | */ | |
735 | for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { | |
736 | if (ve->ve_guid == top_guid) | |
737 | break; | |
738 | } | |
739 | ||
740 | if (ve == NULL) { | |
741 | if ((ve = zfs_alloc(hdl, sizeof (vdev_entry_t))) == NULL) { | |
742 | nvlist_free(config); | |
743 | return (-1); | |
744 | } | |
745 | ve->ve_guid = top_guid; | |
746 | ve->ve_next = pe->pe_vdevs; | |
747 | pe->pe_vdevs = ve; | |
748 | } | |
749 | ||
750 | /* | |
751 | * Third, see if we have a config with a matching transaction group. If | |
752 | * so, then we do nothing. Otherwise, add it to the list of known | |
753 | * configs. | |
754 | */ | |
755 | for (ce = ve->ve_configs; ce != NULL; ce = ce->ce_next) { | |
756 | if (ce->ce_txg == txg) | |
757 | break; | |
758 | } | |
759 | ||
760 | if (ce == NULL) { | |
761 | if ((ce = zfs_alloc(hdl, sizeof (config_entry_t))) == NULL) { | |
762 | nvlist_free(config); | |
763 | return (-1); | |
764 | } | |
765 | ce->ce_txg = txg; | |
766 | ce->ce_config = config; | |
767 | ce->ce_next = ve->ve_configs; | |
768 | ve->ve_configs = ce; | |
769 | } else { | |
770 | nvlist_free(config); | |
771 | } | |
772 | ||
773 | /* | |
774 | * At this point we've successfully added our config to the list of | |
775 | * known configs. The last thing to do is add the vdev guid -> path | |
776 | * mappings so that we can fix up the configuration as necessary before | |
777 | * doing the import. | |
778 | */ | |
779 | if ((ne = zfs_alloc(hdl, sizeof (name_entry_t))) == NULL) | |
780 | return (-1); | |
781 | ||
782 | if ((ne->ne_name = zfs_strdup(hdl, path)) == NULL) { | |
783 | free(ne); | |
784 | return (-1); | |
785 | } | |
786 | ||
787 | ne->ne_guid = vdev_guid; | |
44867b6d | 788 | ne->ne_order = order; |
ea04106b | 789 | ne->ne_num_labels = num_labels; |
34dc7c2f BB |
790 | ne->ne_next = pl->names; |
791 | pl->names = ne; | |
792 | ||
793 | return (0); | |
794 | } | |
795 | ||
796 | /* | |
797 | * Returns true if the named pool matches the given GUID. | |
798 | */ | |
799 | static int | |
800 | pool_active(libzfs_handle_t *hdl, const char *name, uint64_t guid, | |
801 | boolean_t *isactive) | |
802 | { | |
803 | zpool_handle_t *zhp; | |
804 | uint64_t theguid; | |
805 | ||
806 | if (zpool_open_silent(hdl, name, &zhp) != 0) | |
807 | return (-1); | |
808 | ||
809 | if (zhp == NULL) { | |
810 | *isactive = B_FALSE; | |
811 | return (0); | |
812 | } | |
813 | ||
814 | verify(nvlist_lookup_uint64(zhp->zpool_config, ZPOOL_CONFIG_POOL_GUID, | |
815 | &theguid) == 0); | |
816 | ||
817 | zpool_close(zhp); | |
818 | ||
819 | *isactive = (theguid == guid); | |
820 | return (0); | |
821 | } | |
822 | ||
823 | static nvlist_t * | |
824 | refresh_config(libzfs_handle_t *hdl, nvlist_t *config) | |
825 | { | |
826 | nvlist_t *nvl; | |
a08ee875 | 827 | zfs_cmd_t zc = {"\0"}; |
cae5b340 | 828 | int err, dstbuf_size; |
34dc7c2f BB |
829 | |
830 | if (zcmd_write_conf_nvlist(hdl, &zc, config) != 0) | |
831 | return (NULL); | |
832 | ||
cae5b340 AX |
833 | dstbuf_size = MAX(CONFIG_BUF_MINSIZE, zc.zc_nvlist_conf_size * 4); |
834 | ||
835 | if (zcmd_alloc_dst_nvlist(hdl, &zc, dstbuf_size) != 0) { | |
34dc7c2f BB |
836 | zcmd_free_nvlists(&zc); |
837 | return (NULL); | |
838 | } | |
839 | ||
840 | while ((err = ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_TRYIMPORT, | |
841 | &zc)) != 0 && errno == ENOMEM) { | |
842 | if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { | |
843 | zcmd_free_nvlists(&zc); | |
844 | return (NULL); | |
845 | } | |
846 | } | |
847 | ||
848 | if (err) { | |
34dc7c2f BB |
849 | zcmd_free_nvlists(&zc); |
850 | return (NULL); | |
851 | } | |
852 | ||
853 | if (zcmd_read_dst_nvlist(hdl, &zc, &nvl) != 0) { | |
854 | zcmd_free_nvlists(&zc); | |
855 | return (NULL); | |
856 | } | |
857 | ||
858 | zcmd_free_nvlists(&zc); | |
859 | return (nvl); | |
860 | } | |
861 | ||
428870ff BB |
862 | /* |
863 | * Determine if the vdev id is a hole in the namespace. | |
864 | */ | |
865 | boolean_t | |
866 | vdev_is_hole(uint64_t *hole_array, uint_t holes, uint_t id) | |
867 | { | |
d6320ddb BB |
868 | int c; |
869 | ||
870 | for (c = 0; c < holes; c++) { | |
428870ff BB |
871 | |
872 | /* Top-level is a hole */ | |
873 | if (hole_array[c] == id) | |
874 | return (B_TRUE); | |
875 | } | |
876 | return (B_FALSE); | |
877 | } | |
878 | ||
34dc7c2f BB |
879 | /* |
880 | * Convert our list of pools into the definitive set of configurations. We | |
881 | * start by picking the best config for each toplevel vdev. Once that's done, | |
882 | * we assemble the toplevel vdevs into a full config for the pool. We make a | |
883 | * pass to fix up any incorrect paths, and then add it to the main list to | |
884 | * return to the user. | |
885 | */ | |
886 | static nvlist_t * | |
887 | get_configs(libzfs_handle_t *hdl, pool_list_t *pl, boolean_t active_ok) | |
888 | { | |
889 | pool_entry_t *pe; | |
890 | vdev_entry_t *ve; | |
891 | config_entry_t *ce; | |
d4ed6673 | 892 | nvlist_t *ret = NULL, *config = NULL, *tmp = NULL, *nvtop, *nvroot; |
34dc7c2f BB |
893 | nvlist_t **spares, **l2cache; |
894 | uint_t i, nspares, nl2cache; | |
895 | boolean_t config_seen; | |
896 | uint64_t best_txg; | |
3bc7e0fb GW |
897 | char *name, *hostname = NULL; |
898 | uint64_t guid; | |
34dc7c2f BB |
899 | uint_t children = 0; |
900 | nvlist_t **child = NULL; | |
428870ff BB |
901 | uint_t holes; |
902 | uint64_t *hole_array, max_id; | |
34dc7c2f BB |
903 | uint_t c; |
904 | boolean_t isactive; | |
905 | uint64_t hostid; | |
906 | nvlist_t *nvl; | |
428870ff | 907 | boolean_t valid_top_config = B_FALSE; |
34dc7c2f BB |
908 | |
909 | if (nvlist_alloc(&ret, 0, 0) != 0) | |
910 | goto nomem; | |
911 | ||
912 | for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { | |
428870ff | 913 | uint64_t id, max_txg = 0; |
34dc7c2f BB |
914 | |
915 | if (nvlist_alloc(&config, NV_UNIQUE_NAME, 0) != 0) | |
916 | goto nomem; | |
917 | config_seen = B_FALSE; | |
918 | ||
919 | /* | |
920 | * Iterate over all toplevel vdevs. Grab the pool configuration | |
921 | * from the first one we find, and then go through the rest and | |
922 | * add them as necessary to the 'vdevs' member of the config. | |
923 | */ | |
924 | for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { | |
925 | ||
926 | /* | |
927 | * Determine the best configuration for this vdev by | |
928 | * selecting the config with the latest transaction | |
929 | * group. | |
930 | */ | |
931 | best_txg = 0; | |
932 | for (ce = ve->ve_configs; ce != NULL; | |
933 | ce = ce->ce_next) { | |
934 | ||
935 | if (ce->ce_txg > best_txg) { | |
936 | tmp = ce->ce_config; | |
937 | best_txg = ce->ce_txg; | |
938 | } | |
939 | } | |
940 | ||
428870ff BB |
941 | /* |
942 | * We rely on the fact that the max txg for the | |
943 | * pool will contain the most up-to-date information | |
944 | * about the valid top-levels in the vdev namespace. | |
945 | */ | |
946 | if (best_txg > max_txg) { | |
947 | (void) nvlist_remove(config, | |
948 | ZPOOL_CONFIG_VDEV_CHILDREN, | |
949 | DATA_TYPE_UINT64); | |
950 | (void) nvlist_remove(config, | |
951 | ZPOOL_CONFIG_HOLE_ARRAY, | |
952 | DATA_TYPE_UINT64_ARRAY); | |
953 | ||
954 | max_txg = best_txg; | |
955 | hole_array = NULL; | |
956 | holes = 0; | |
957 | max_id = 0; | |
958 | valid_top_config = B_FALSE; | |
959 | ||
960 | if (nvlist_lookup_uint64(tmp, | |
961 | ZPOOL_CONFIG_VDEV_CHILDREN, &max_id) == 0) { | |
962 | verify(nvlist_add_uint64(config, | |
963 | ZPOOL_CONFIG_VDEV_CHILDREN, | |
964 | max_id) == 0); | |
965 | valid_top_config = B_TRUE; | |
966 | } | |
967 | ||
968 | if (nvlist_lookup_uint64_array(tmp, | |
969 | ZPOOL_CONFIG_HOLE_ARRAY, &hole_array, | |
970 | &holes) == 0) { | |
971 | verify(nvlist_add_uint64_array(config, | |
972 | ZPOOL_CONFIG_HOLE_ARRAY, | |
973 | hole_array, holes) == 0); | |
974 | } | |
975 | } | |
976 | ||
34dc7c2f BB |
977 | if (!config_seen) { |
978 | /* | |
979 | * Copy the relevant pieces of data to the pool | |
980 | * configuration: | |
981 | * | |
982 | * version | |
3bc7e0fb GW |
983 | * pool guid |
984 | * name | |
d96eb2b1 | 985 | * comment (if available) |
3bc7e0fb | 986 | * pool state |
34dc7c2f BB |
987 | * hostid (if available) |
988 | * hostname (if available) | |
989 | */ | |
c06d4368 | 990 | uint64_t state, version; |
3bc7e0fb GW |
991 | char *comment = NULL; |
992 | ||
993 | version = fnvlist_lookup_uint64(tmp, | |
994 | ZPOOL_CONFIG_VERSION); | |
995 | fnvlist_add_uint64(config, | |
996 | ZPOOL_CONFIG_VERSION, version); | |
997 | guid = fnvlist_lookup_uint64(tmp, | |
998 | ZPOOL_CONFIG_POOL_GUID); | |
999 | fnvlist_add_uint64(config, | |
1000 | ZPOOL_CONFIG_POOL_GUID, guid); | |
1001 | name = fnvlist_lookup_string(tmp, | |
1002 | ZPOOL_CONFIG_POOL_NAME); | |
1003 | fnvlist_add_string(config, | |
1004 | ZPOOL_CONFIG_POOL_NAME, name); | |
34dc7c2f | 1005 | |
d96eb2b1 | 1006 | if (nvlist_lookup_string(tmp, |
3bc7e0fb GW |
1007 | ZPOOL_CONFIG_COMMENT, &comment) == 0) |
1008 | fnvlist_add_string(config, | |
1009 | ZPOOL_CONFIG_COMMENT, comment); | |
d96eb2b1 | 1010 | |
3bc7e0fb GW |
1011 | state = fnvlist_lookup_uint64(tmp, |
1012 | ZPOOL_CONFIG_POOL_STATE); | |
1013 | fnvlist_add_uint64(config, | |
1014 | ZPOOL_CONFIG_POOL_STATE, state); | |
d96eb2b1 | 1015 | |
34dc7c2f BB |
1016 | hostid = 0; |
1017 | if (nvlist_lookup_uint64(tmp, | |
1018 | ZPOOL_CONFIG_HOSTID, &hostid) == 0) { | |
3bc7e0fb GW |
1019 | fnvlist_add_uint64(config, |
1020 | ZPOOL_CONFIG_HOSTID, hostid); | |
1021 | hostname = fnvlist_lookup_string(tmp, | |
1022 | ZPOOL_CONFIG_HOSTNAME); | |
1023 | fnvlist_add_string(config, | |
1024 | ZPOOL_CONFIG_HOSTNAME, hostname); | |
34dc7c2f BB |
1025 | } |
1026 | ||
1027 | config_seen = B_TRUE; | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Add this top-level vdev to the child array. | |
1032 | */ | |
1033 | verify(nvlist_lookup_nvlist(tmp, | |
1034 | ZPOOL_CONFIG_VDEV_TREE, &nvtop) == 0); | |
1035 | verify(nvlist_lookup_uint64(nvtop, ZPOOL_CONFIG_ID, | |
1036 | &id) == 0); | |
428870ff | 1037 | |
34dc7c2f BB |
1038 | if (id >= children) { |
1039 | nvlist_t **newchild; | |
1040 | ||
1041 | newchild = zfs_alloc(hdl, (id + 1) * | |
1042 | sizeof (nvlist_t *)); | |
1043 | if (newchild == NULL) | |
1044 | goto nomem; | |
1045 | ||
1046 | for (c = 0; c < children; c++) | |
1047 | newchild[c] = child[c]; | |
1048 | ||
1049 | free(child); | |
1050 | child = newchild; | |
1051 | children = id + 1; | |
1052 | } | |
1053 | if (nvlist_dup(nvtop, &child[id], 0) != 0) | |
1054 | goto nomem; | |
1055 | ||
1056 | } | |
1057 | ||
428870ff BB |
1058 | /* |
1059 | * If we have information about all the top-levels then | |
1060 | * clean up the nvlist which we've constructed. This | |
1061 | * means removing any extraneous devices that are | |
1062 | * beyond the valid range or adding devices to the end | |
1063 | * of our array which appear to be missing. | |
1064 | */ | |
1065 | if (valid_top_config) { | |
1066 | if (max_id < children) { | |
1067 | for (c = max_id; c < children; c++) | |
1068 | nvlist_free(child[c]); | |
1069 | children = max_id; | |
1070 | } else if (max_id > children) { | |
1071 | nvlist_t **newchild; | |
1072 | ||
1073 | newchild = zfs_alloc(hdl, (max_id) * | |
1074 | sizeof (nvlist_t *)); | |
1075 | if (newchild == NULL) | |
1076 | goto nomem; | |
1077 | ||
1078 | for (c = 0; c < children; c++) | |
1079 | newchild[c] = child[c]; | |
1080 | ||
1081 | free(child); | |
1082 | child = newchild; | |
1083 | children = max_id; | |
1084 | } | |
1085 | } | |
1086 | ||
34dc7c2f BB |
1087 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
1088 | &guid) == 0); | |
1089 | ||
428870ff BB |
1090 | /* |
1091 | * The vdev namespace may contain holes as a result of | |
1092 | * device removal. We must add them back into the vdev | |
1093 | * tree before we process any missing devices. | |
1094 | */ | |
1095 | if (holes > 0) { | |
1096 | ASSERT(valid_top_config); | |
1097 | ||
1098 | for (c = 0; c < children; c++) { | |
1099 | nvlist_t *holey; | |
1100 | ||
1101 | if (child[c] != NULL || | |
1102 | !vdev_is_hole(hole_array, holes, c)) | |
1103 | continue; | |
1104 | ||
1105 | if (nvlist_alloc(&holey, NV_UNIQUE_NAME, | |
1106 | 0) != 0) | |
1107 | goto nomem; | |
1108 | ||
1109 | /* | |
1110 | * Holes in the namespace are treated as | |
1111 | * "hole" top-level vdevs and have a | |
1112 | * special flag set on them. | |
1113 | */ | |
1114 | if (nvlist_add_string(holey, | |
1115 | ZPOOL_CONFIG_TYPE, | |
1116 | VDEV_TYPE_HOLE) != 0 || | |
1117 | nvlist_add_uint64(holey, | |
1118 | ZPOOL_CONFIG_ID, c) != 0 || | |
1119 | nvlist_add_uint64(holey, | |
cae5b340 AX |
1120 | ZPOOL_CONFIG_GUID, 0ULL) != 0) { |
1121 | nvlist_free(holey); | |
428870ff | 1122 | goto nomem; |
cae5b340 | 1123 | } |
428870ff BB |
1124 | child[c] = holey; |
1125 | } | |
1126 | } | |
1127 | ||
34dc7c2f BB |
1128 | /* |
1129 | * Look for any missing top-level vdevs. If this is the case, | |
1130 | * create a faked up 'missing' vdev as a placeholder. We cannot | |
1131 | * simply compress the child array, because the kernel performs | |
1132 | * certain checks to make sure the vdev IDs match their location | |
1133 | * in the configuration. | |
1134 | */ | |
428870ff | 1135 | for (c = 0; c < children; c++) { |
34dc7c2f BB |
1136 | if (child[c] == NULL) { |
1137 | nvlist_t *missing; | |
1138 | if (nvlist_alloc(&missing, NV_UNIQUE_NAME, | |
1139 | 0) != 0) | |
1140 | goto nomem; | |
1141 | if (nvlist_add_string(missing, | |
1142 | ZPOOL_CONFIG_TYPE, | |
1143 | VDEV_TYPE_MISSING) != 0 || | |
1144 | nvlist_add_uint64(missing, | |
1145 | ZPOOL_CONFIG_ID, c) != 0 || | |
1146 | nvlist_add_uint64(missing, | |
1147 | ZPOOL_CONFIG_GUID, 0ULL) != 0) { | |
1148 | nvlist_free(missing); | |
1149 | goto nomem; | |
1150 | } | |
1151 | child[c] = missing; | |
1152 | } | |
428870ff | 1153 | } |
34dc7c2f BB |
1154 | |
1155 | /* | |
1156 | * Put all of this pool's top-level vdevs into a root vdev. | |
1157 | */ | |
1158 | if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) | |
1159 | goto nomem; | |
1160 | if (nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, | |
1161 | VDEV_TYPE_ROOT) != 0 || | |
1162 | nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) != 0 || | |
1163 | nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, guid) != 0 || | |
1164 | nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, | |
1165 | child, children) != 0) { | |
1166 | nvlist_free(nvroot); | |
1167 | goto nomem; | |
1168 | } | |
1169 | ||
1170 | for (c = 0; c < children; c++) | |
1171 | nvlist_free(child[c]); | |
1172 | free(child); | |
1173 | children = 0; | |
1174 | child = NULL; | |
1175 | ||
1176 | /* | |
1177 | * Go through and fix up any paths and/or devids based on our | |
1178 | * known list of vdev GUID -> path mappings. | |
1179 | */ | |
1180 | if (fix_paths(nvroot, pl->names) != 0) { | |
1181 | nvlist_free(nvroot); | |
1182 | goto nomem; | |
1183 | } | |
1184 | ||
1185 | /* | |
1186 | * Add the root vdev to this pool's configuration. | |
1187 | */ | |
1188 | if (nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
1189 | nvroot) != 0) { | |
1190 | nvlist_free(nvroot); | |
1191 | goto nomem; | |
1192 | } | |
1193 | nvlist_free(nvroot); | |
1194 | ||
1195 | /* | |
1196 | * zdb uses this path to report on active pools that were | |
1197 | * imported or created using -R. | |
1198 | */ | |
1199 | if (active_ok) | |
1200 | goto add_pool; | |
1201 | ||
1202 | /* | |
1203 | * Determine if this pool is currently active, in which case we | |
1204 | * can't actually import it. | |
1205 | */ | |
1206 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
1207 | &name) == 0); | |
1208 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
1209 | &guid) == 0); | |
1210 | ||
1211 | if (pool_active(hdl, name, guid, &isactive) != 0) | |
1212 | goto error; | |
1213 | ||
1214 | if (isactive) { | |
1215 | nvlist_free(config); | |
1216 | config = NULL; | |
1217 | continue; | |
1218 | } | |
1219 | ||
428870ff BB |
1220 | if ((nvl = refresh_config(hdl, config)) == NULL) { |
1221 | nvlist_free(config); | |
1222 | config = NULL; | |
1223 | continue; | |
1224 | } | |
34dc7c2f BB |
1225 | |
1226 | nvlist_free(config); | |
1227 | config = nvl; | |
1228 | ||
1229 | /* | |
1230 | * Go through and update the paths for spares, now that we have | |
1231 | * them. | |
1232 | */ | |
1233 | verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
1234 | &nvroot) == 0); | |
1235 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
1236 | &spares, &nspares) == 0) { | |
1237 | for (i = 0; i < nspares; i++) { | |
1238 | if (fix_paths(spares[i], pl->names) != 0) | |
1239 | goto nomem; | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Update the paths for l2cache devices. | |
1245 | */ | |
1246 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, | |
1247 | &l2cache, &nl2cache) == 0) { | |
1248 | for (i = 0; i < nl2cache; i++) { | |
1249 | if (fix_paths(l2cache[i], pl->names) != 0) | |
1250 | goto nomem; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Restore the original information read from the actual label. | |
1256 | */ | |
1257 | (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTID, | |
1258 | DATA_TYPE_UINT64); | |
1259 | (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTNAME, | |
1260 | DATA_TYPE_STRING); | |
1261 | if (hostid != 0) { | |
1262 | verify(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, | |
1263 | hostid) == 0); | |
1264 | verify(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, | |
1265 | hostname) == 0); | |
1266 | } | |
1267 | ||
1268 | add_pool: | |
1269 | /* | |
1270 | * Add this pool to the list of configs. | |
1271 | */ | |
1272 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
1273 | &name) == 0); | |
1274 | if (nvlist_add_nvlist(ret, name, config) != 0) | |
1275 | goto nomem; | |
1276 | ||
1277 | nvlist_free(config); | |
1278 | config = NULL; | |
1279 | } | |
1280 | ||
1281 | return (ret); | |
1282 | ||
1283 | nomem: | |
1284 | (void) no_memory(hdl); | |
1285 | error: | |
1286 | nvlist_free(config); | |
1287 | nvlist_free(ret); | |
1288 | for (c = 0; c < children; c++) | |
1289 | nvlist_free(child[c]); | |
1290 | free(child); | |
1291 | ||
1292 | return (NULL); | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * Return the offset of the given label. | |
1297 | */ | |
1298 | static uint64_t | |
1299 | label_offset(uint64_t size, int l) | |
1300 | { | |
1301 | ASSERT(P2PHASE_TYPED(size, sizeof (vdev_label_t), uint64_t) == 0); | |
1302 | return (l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ? | |
1303 | 0 : size - VDEV_LABELS * sizeof (vdev_label_t))); | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Given a file descriptor, read the label information and return an nvlist | |
ea04106b AX |
1308 | * describing the configuration, if there is one. The number of valid |
1309 | * labels found will be returned in num_labels when non-NULL. | |
34dc7c2f BB |
1310 | */ |
1311 | int | |
ea04106b | 1312 | zpool_read_label(int fd, nvlist_t **config, int *num_labels) |
34dc7c2f BB |
1313 | { |
1314 | struct stat64 statbuf; | |
ea04106b | 1315 | int l, count = 0; |
34dc7c2f | 1316 | vdev_label_t *label; |
ea04106b AX |
1317 | nvlist_t *expected_config = NULL; |
1318 | uint64_t expected_guid = 0, size; | |
cae5b340 | 1319 | int error; |
34dc7c2f BB |
1320 | |
1321 | *config = NULL; | |
1322 | ||
c06d4368 | 1323 | if (fstat64_blk(fd, &statbuf) == -1) |
34dc7c2f BB |
1324 | return (0); |
1325 | size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); | |
1326 | ||
cae5b340 AX |
1327 | error = posix_memalign((void **)&label, PAGESIZE, sizeof (*label)); |
1328 | if (error) | |
34dc7c2f BB |
1329 | return (-1); |
1330 | ||
1331 | for (l = 0; l < VDEV_LABELS; l++) { | |
ea04106b AX |
1332 | uint64_t state, guid, txg; |
1333 | ||
b128c09f | 1334 | if (pread64(fd, label, sizeof (vdev_label_t), |
34dc7c2f BB |
1335 | label_offset(size, l)) != sizeof (vdev_label_t)) |
1336 | continue; | |
1337 | ||
1338 | if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist, | |
1339 | sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) | |
1340 | continue; | |
1341 | ||
ea04106b AX |
1342 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, |
1343 | &guid) != 0 || guid == 0) { | |
1344 | nvlist_free(*config); | |
1345 | continue; | |
1346 | } | |
1347 | ||
34dc7c2f BB |
1348 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, |
1349 | &state) != 0 || state > POOL_STATE_L2CACHE) { | |
1350 | nvlist_free(*config); | |
1351 | continue; | |
1352 | } | |
1353 | ||
1354 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
1355 | (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, | |
1356 | &txg) != 0 || txg == 0)) { | |
1357 | nvlist_free(*config); | |
1358 | continue; | |
1359 | } | |
1360 | ||
ea04106b AX |
1361 | if (expected_guid) { |
1362 | if (expected_guid == guid) | |
1363 | count++; | |
1364 | ||
1365 | nvlist_free(*config); | |
1366 | } else { | |
1367 | expected_config = *config; | |
1368 | expected_guid = guid; | |
1369 | count++; | |
1370 | } | |
34dc7c2f BB |
1371 | } |
1372 | ||
ea04106b AX |
1373 | if (num_labels != NULL) |
1374 | *num_labels = count; | |
1375 | ||
34dc7c2f | 1376 | free(label); |
ea04106b AX |
1377 | *config = expected_config; |
1378 | ||
34dc7c2f BB |
1379 | return (0); |
1380 | } | |
1381 | ||
cae5b340 AX |
1382 | typedef struct rdsk_node { |
1383 | char *rn_name; /* Full path to device */ | |
1384 | int rn_order; /* Preferred order (low to high) */ | |
1385 | int rn_num_labels; /* Number of valid labels */ | |
1386 | uint64_t rn_vdev_guid; /* Expected vdev guid when set */ | |
1387 | libzfs_handle_t *rn_hdl; | |
1388 | nvlist_t *rn_config; /* Label config */ | |
1389 | avl_tree_t *rn_avl; | |
1390 | avl_node_t rn_node; | |
1391 | kmutex_t *rn_lock; | |
1392 | boolean_t rn_labelpaths; | |
1393 | } rdsk_node_t; | |
1394 | ||
1395 | /* | |
1396 | * Sorted by vdev guid and full path to allow for multiple entries with | |
1397 | * the same full path name. This is required because it's possible to | |
1398 | * have multiple block devices with labels that refer to the same | |
1399 | * ZPOOL_CONFIG_PATH yet have different vdev guids. In this case both | |
1400 | * entries need to be added to the cache. Scenarios where this can occur | |
1401 | * include overwritten pool labels, devices which are visible from multiple | |
1402 | * hosts and multipath devices. | |
1403 | */ | |
1404 | static int | |
1405 | slice_cache_compare(const void *arg1, const void *arg2) | |
1406 | { | |
1407 | const char *nm1 = ((rdsk_node_t *)arg1)->rn_name; | |
1408 | const char *nm2 = ((rdsk_node_t *)arg2)->rn_name; | |
1409 | uint64_t guid1 = ((rdsk_node_t *)arg1)->rn_vdev_guid; | |
1410 | uint64_t guid2 = ((rdsk_node_t *)arg2)->rn_vdev_guid; | |
1411 | int rv; | |
1412 | ||
1413 | rv = AVL_CMP(guid1, guid2); | |
1414 | if (rv) | |
1415 | return (rv); | |
1416 | ||
1417 | return (AVL_ISIGN(strcmp(nm1, nm2))); | |
1418 | } | |
1419 | ||
1420 | static boolean_t | |
1421 | is_watchdog_dev(char *dev) | |
1422 | { | |
1423 | /* For 'watchdog' dev */ | |
1424 | if (strcmp(dev, "watchdog") == 0) | |
1425 | return (B_TRUE); | |
1426 | ||
1427 | /* For 'watchdog<digit><whatever> */ | |
1428 | if (strstr(dev, "watchdog") == dev && isdigit(dev[8])) | |
1429 | return (B_TRUE); | |
1430 | ||
1431 | return (B_FALSE); | |
1432 | } | |
1433 | ||
1434 | static int | |
1435 | label_paths_impl(libzfs_handle_t *hdl, nvlist_t *nvroot, uint64_t pool_guid, | |
1436 | uint64_t vdev_guid, char **path, char **devid) | |
1437 | { | |
1438 | nvlist_t **child; | |
1439 | uint_t c, children; | |
1440 | uint64_t guid; | |
1441 | char *val; | |
1442 | int error; | |
1443 | ||
1444 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, | |
1445 | &child, &children) == 0) { | |
1446 | for (c = 0; c < children; c++) { | |
1447 | error = label_paths_impl(hdl, child[c], | |
1448 | pool_guid, vdev_guid, path, devid); | |
1449 | if (error) | |
1450 | return (error); | |
1451 | } | |
1452 | return (0); | |
1453 | } | |
1454 | ||
1455 | if (nvroot == NULL) | |
1456 | return (0); | |
1457 | ||
1458 | error = nvlist_lookup_uint64(nvroot, ZPOOL_CONFIG_GUID, &guid); | |
1459 | if ((error != 0) || (guid != vdev_guid)) | |
1460 | return (0); | |
1461 | ||
1462 | error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_PATH, &val); | |
1463 | if (error == 0) | |
1464 | *path = val; | |
1465 | ||
1466 | error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_DEVID, &val); | |
1467 | if (error == 0) | |
1468 | *devid = val; | |
1469 | ||
1470 | return (0); | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Given a disk label fetch the ZPOOL_CONFIG_PATH and ZPOOL_CONFIG_DEVID | |
1475 | * and store these strings as config_path and devid_path respectively. | |
1476 | * The returned pointers are only valid as long as label remains valid. | |
1477 | */ | |
1478 | static int | |
1479 | label_paths(libzfs_handle_t *hdl, nvlist_t *label, char **path, char **devid) | |
1480 | { | |
1481 | nvlist_t *nvroot; | |
1482 | uint64_t pool_guid; | |
1483 | uint64_t vdev_guid; | |
1484 | ||
1485 | *path = NULL; | |
1486 | *devid = NULL; | |
1487 | ||
1488 | if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || | |
1489 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &pool_guid) || | |
1490 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &vdev_guid)) | |
1491 | return (ENOENT); | |
1492 | ||
1493 | return (label_paths_impl(hdl, nvroot, pool_guid, vdev_guid, path, | |
1494 | devid)); | |
1495 | } | |
1496 | ||
1497 | static void | |
1498 | zpool_open_func(void *arg) | |
1499 | { | |
1500 | rdsk_node_t *rn = arg; | |
1501 | libzfs_handle_t *hdl = rn->rn_hdl; | |
1502 | struct stat64 statbuf; | |
1503 | nvlist_t *config; | |
1504 | char *bname, *dupname; | |
1505 | uint64_t vdev_guid = 0; | |
1506 | int error; | |
1507 | int num_labels; | |
1508 | int fd; | |
1509 | ||
1510 | /* | |
1511 | * Skip devices with well known prefixes there can be side effects | |
1512 | * when opening devices which need to be avoided. | |
1513 | * | |
1514 | * hpet - High Precision Event Timer | |
1515 | * watchdog - Watchdog must be closed in a special way. | |
1516 | */ | |
1517 | dupname = zfs_strdup(hdl, rn->rn_name); | |
1518 | bname = basename(dupname); | |
1519 | error = ((strcmp(bname, "hpet") == 0) || is_watchdog_dev(bname)); | |
1520 | free(dupname); | |
1521 | if (error) | |
1522 | return; | |
1523 | ||
1524 | /* | |
1525 | * Ignore failed stats. We only want regular files and block devices. | |
1526 | */ | |
1527 | if (stat64(rn->rn_name, &statbuf) != 0 || | |
1528 | (!S_ISREG(statbuf.st_mode) && !S_ISBLK(statbuf.st_mode))) | |
1529 | return; | |
1530 | ||
1531 | /* | |
1532 | * Preferentially open using O_DIRECT to bypass the block device | |
1533 | * cache which may be stale for multipath devices. An EINVAL errno | |
1534 | * indicates O_DIRECT is unsupported so fallback to just O_RDONLY. | |
1535 | */ | |
1536 | fd = open(rn->rn_name, O_RDONLY | O_DIRECT); | |
1537 | if ((fd < 0) && (errno == EINVAL)) | |
1538 | fd = open(rn->rn_name, O_RDONLY); | |
1539 | ||
1540 | if (fd < 0) | |
1541 | return; | |
1542 | ||
1543 | /* | |
1544 | * This file is too small to hold a zpool | |
1545 | */ | |
1546 | if (S_ISREG(statbuf.st_mode) && statbuf.st_size < SPA_MINDEVSIZE) { | |
1547 | (void) close(fd); | |
1548 | return; | |
1549 | } | |
1550 | ||
1551 | error = zpool_read_label(fd, &config, &num_labels); | |
1552 | if (error != 0) { | |
1553 | (void) close(fd); | |
1554 | return; | |
1555 | } | |
1556 | ||
1557 | if (num_labels == 0) { | |
1558 | (void) close(fd); | |
1559 | nvlist_free(config); | |
1560 | return; | |
1561 | } | |
1562 | ||
1563 | /* | |
1564 | * Check that the vdev is for the expected guid. Additional entries | |
1565 | * are speculatively added based on the paths stored in the labels. | |
1566 | * Entries with valid paths but incorrect guids must be removed. | |
1567 | */ | |
1568 | error = nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid); | |
1569 | if (error || (rn->rn_vdev_guid && rn->rn_vdev_guid != vdev_guid)) { | |
1570 | (void) close(fd); | |
1571 | nvlist_free(config); | |
1572 | return; | |
1573 | } | |
1574 | ||
1575 | (void) close(fd); | |
1576 | ||
1577 | rn->rn_config = config; | |
1578 | rn->rn_num_labels = num_labels; | |
1579 | ||
1580 | /* | |
1581 | * Add additional entries for paths described by this label. | |
1582 | */ | |
1583 | if (rn->rn_labelpaths) { | |
1584 | char *path = NULL; | |
1585 | char *devid = NULL; | |
1586 | rdsk_node_t *slice; | |
1587 | avl_index_t where; | |
1588 | int error; | |
1589 | ||
1590 | if (label_paths(rn->rn_hdl, rn->rn_config, &path, &devid)) | |
1591 | return; | |
1592 | ||
1593 | /* | |
1594 | * Allow devlinks to stabilize so all paths are available. | |
1595 | */ | |
1596 | zpool_label_disk_wait(rn->rn_name, DISK_LABEL_WAIT); | |
1597 | ||
1598 | if (path != NULL) { | |
1599 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1600 | slice->rn_name = zfs_strdup(hdl, path); | |
1601 | slice->rn_vdev_guid = vdev_guid; | |
1602 | slice->rn_avl = rn->rn_avl; | |
1603 | slice->rn_hdl = hdl; | |
1604 | slice->rn_order = IMPORT_ORDER_PREFERRED_1; | |
1605 | slice->rn_labelpaths = B_FALSE; | |
1606 | mutex_enter(rn->rn_lock); | |
1607 | if (avl_find(rn->rn_avl, slice, &where)) { | |
1608 | mutex_exit(rn->rn_lock); | |
1609 | free(slice->rn_name); | |
1610 | free(slice); | |
1611 | } else { | |
1612 | avl_insert(rn->rn_avl, slice, where); | |
1613 | mutex_exit(rn->rn_lock); | |
1614 | zpool_open_func(slice); | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | if (devid != NULL) { | |
1619 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1620 | error = asprintf(&slice->rn_name, "%s%s", | |
1621 | DEV_BYID_PATH, devid); | |
1622 | if (error == -1) { | |
1623 | free(slice); | |
1624 | return; | |
1625 | } | |
1626 | ||
1627 | slice->rn_vdev_guid = vdev_guid; | |
1628 | slice->rn_avl = rn->rn_avl; | |
1629 | slice->rn_hdl = hdl; | |
1630 | slice->rn_order = IMPORT_ORDER_PREFERRED_2; | |
1631 | slice->rn_labelpaths = B_FALSE; | |
1632 | mutex_enter(rn->rn_lock); | |
1633 | if (avl_find(rn->rn_avl, slice, &where)) { | |
1634 | mutex_exit(rn->rn_lock); | |
1635 | free(slice->rn_name); | |
1636 | free(slice); | |
1637 | } else { | |
1638 | avl_insert(rn->rn_avl, slice, where); | |
1639 | mutex_exit(rn->rn_lock); | |
1640 | zpool_open_func(slice); | |
1641 | } | |
1642 | } | |
1643 | } | |
1644 | } | |
1645 | ||
c06d4368 AX |
1646 | /* |
1647 | * Given a file descriptor, clear (zero) the label information. This function | |
1648 | * is used in the appliance stack as part of the ZFS sysevent module and | |
1649 | * to implement the "zpool labelclear" command. | |
1650 | */ | |
1651 | int | |
1652 | zpool_clear_label(int fd) | |
1653 | { | |
1654 | struct stat64 statbuf; | |
1655 | int l; | |
1656 | vdev_label_t *label; | |
1657 | uint64_t size; | |
1658 | ||
1659 | if (fstat64_blk(fd, &statbuf) == -1) | |
1660 | return (0); | |
1661 | size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); | |
1662 | ||
1663 | if ((label = calloc(sizeof (vdev_label_t), 1)) == NULL) | |
1664 | return (-1); | |
1665 | ||
1666 | for (l = 0; l < VDEV_LABELS; l++) { | |
1667 | if (pwrite64(fd, label, sizeof (vdev_label_t), | |
ea04106b AX |
1668 | label_offset(size, l)) != sizeof (vdev_label_t)) { |
1669 | free(label); | |
c06d4368 | 1670 | return (-1); |
ea04106b | 1671 | } |
c06d4368 AX |
1672 | } |
1673 | ||
1674 | free(label); | |
1675 | return (0); | |
1676 | } | |
1677 | ||
d603ed6c | 1678 | /* |
cae5b340 | 1679 | * Scan a list of directories for zfs devices. |
d603ed6c | 1680 | */ |
428870ff | 1681 | static int |
cae5b340 AX |
1682 | zpool_find_import_scan(libzfs_handle_t *hdl, kmutex_t *lock, |
1683 | avl_tree_t **slice_cache, char **dir, int dirs) | |
428870ff | 1684 | { |
cae5b340 AX |
1685 | avl_tree_t *cache; |
1686 | rdsk_node_t *slice; | |
1687 | void *cookie; | |
1688 | int i, error; | |
1689 | ||
1690 | *slice_cache = NULL; | |
1691 | cache = zfs_alloc(hdl, sizeof (avl_tree_t)); | |
1692 | avl_create(cache, slice_cache_compare, sizeof (rdsk_node_t), | |
1693 | offsetof(rdsk_node_t, rn_node)); | |
1694 | ||
1695 | for (i = 0; i < dirs; i++) { | |
1696 | char path[MAXPATHLEN]; | |
1697 | struct dirent64 *dp; | |
1698 | DIR *dirp; | |
1699 | ||
1700 | if (realpath(dir[i], path) == NULL) { | |
1701 | error = errno; | |
1702 | if (error == ENOENT) | |
1703 | continue; | |
1704 | ||
1705 | zfs_error_aux(hdl, strerror(error)); | |
1706 | (void) zfs_error_fmt(hdl, EZFS_BADPATH, dgettext( | |
1707 | TEXT_DOMAIN, "cannot resolve path '%s'"), dir[i]); | |
1708 | goto error; | |
1709 | } | |
1710 | ||
1711 | dirp = opendir(path); | |
1712 | if (dirp == NULL) { | |
1713 | error = errno; | |
1714 | zfs_error_aux(hdl, strerror(error)); | |
1715 | (void) zfs_error_fmt(hdl, EZFS_BADPATH, | |
1716 | dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); | |
1717 | goto error; | |
1718 | } | |
1719 | ||
1720 | while ((dp = readdir64(dirp)) != NULL) { | |
1721 | const char *name = dp->d_name; | |
1722 | if (name[0] == '.' && | |
1723 | (name[1] == 0 || (name[1] == '.' && name[2] == 0))) | |
1724 | continue; | |
1725 | ||
1726 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1727 | error = asprintf(&slice->rn_name, "%s/%s", path, name); | |
1728 | if (error == -1) { | |
1729 | free(slice); | |
1730 | continue; | |
1731 | } | |
1732 | slice->rn_vdev_guid = 0; | |
1733 | slice->rn_lock = lock; | |
1734 | slice->rn_avl = cache; | |
1735 | slice->rn_hdl = hdl; | |
1736 | slice->rn_order = i + IMPORT_ORDER_SCAN_OFFSET; | |
1737 | slice->rn_labelpaths = B_FALSE; | |
1738 | mutex_enter(lock); | |
1739 | avl_add(cache, slice); | |
1740 | mutex_exit(lock); | |
1741 | } | |
1742 | ||
1743 | (void) closedir(dirp); | |
1744 | } | |
1745 | ||
1746 | *slice_cache = cache; | |
1747 | return (0); | |
1748 | ||
1749 | error: | |
1750 | cookie = NULL; | |
1751 | while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { | |
1752 | free(slice->rn_name); | |
1753 | free(slice); | |
1754 | } | |
1755 | free(cache); | |
1756 | ||
1757 | return (error); | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * Use libblkid to quickly enumerate all known zfs devices. | |
1762 | */ | |
1763 | static int | |
1764 | zpool_find_import_blkid(libzfs_handle_t *hdl, kmutex_t *lock, | |
1765 | avl_tree_t **slice_cache) | |
1766 | { | |
1767 | rdsk_node_t *slice; | |
d603ed6c BB |
1768 | blkid_cache cache; |
1769 | blkid_dev_iterate iter; | |
1770 | blkid_dev dev; | |
cae5b340 AX |
1771 | avl_index_t where; |
1772 | int error; | |
428870ff | 1773 | |
cae5b340 | 1774 | *slice_cache = NULL; |
428870ff | 1775 | |
cae5b340 AX |
1776 | error = blkid_get_cache(&cache, NULL); |
1777 | if (error != 0) | |
1778 | return (error); | |
1779 | ||
1780 | error = blkid_probe_all_new(cache); | |
1781 | if (error != 0) { | |
1782 | blkid_put_cache(cache); | |
1783 | return (error); | |
428870ff | 1784 | } |
428870ff | 1785 | |
d603ed6c BB |
1786 | iter = blkid_dev_iterate_begin(cache); |
1787 | if (iter == NULL) { | |
cae5b340 AX |
1788 | blkid_put_cache(cache); |
1789 | return (EINVAL); | |
d603ed6c | 1790 | } |
428870ff | 1791 | |
cae5b340 AX |
1792 | error = blkid_dev_set_search(iter, "TYPE", "zfs_member"); |
1793 | if (error != 0) { | |
1794 | blkid_dev_iterate_end(iter); | |
1795 | blkid_put_cache(cache); | |
1796 | return (error); | |
428870ff | 1797 | } |
428870ff | 1798 | |
cae5b340 AX |
1799 | *slice_cache = zfs_alloc(hdl, sizeof (avl_tree_t)); |
1800 | avl_create(*slice_cache, slice_cache_compare, sizeof (rdsk_node_t), | |
1801 | offsetof(rdsk_node_t, rn_node)); | |
428870ff | 1802 | |
cae5b340 AX |
1803 | while (blkid_dev_next(iter, &dev) == 0) { |
1804 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1805 | slice->rn_name = zfs_strdup(hdl, blkid_dev_devname(dev)); | |
1806 | slice->rn_vdev_guid = 0; | |
1807 | slice->rn_lock = lock; | |
1808 | slice->rn_avl = *slice_cache; | |
1809 | slice->rn_hdl = hdl; | |
1810 | slice->rn_labelpaths = B_TRUE; | |
1811 | ||
1812 | error = zfs_path_order(slice->rn_name, &slice->rn_order); | |
1813 | if (error == 0) | |
1814 | slice->rn_order += IMPORT_ORDER_SCAN_OFFSET; | |
1815 | else | |
1816 | slice->rn_order = IMPORT_ORDER_DEFAULT; | |
428870ff | 1817 | |
cae5b340 AX |
1818 | mutex_enter(lock); |
1819 | if (avl_find(*slice_cache, slice, &where)) { | |
1820 | free(slice->rn_name); | |
1821 | free(slice); | |
1822 | } else { | |
1823 | avl_insert(*slice_cache, slice, where); | |
1824 | } | |
1825 | mutex_exit(lock); | |
428870ff BB |
1826 | } |
1827 | ||
d603ed6c | 1828 | blkid_dev_iterate_end(iter); |
d603ed6c | 1829 | blkid_put_cache(cache); |
cae5b340 AX |
1830 | |
1831 | return (0); | |
428870ff BB |
1832 | } |
1833 | ||
eac47204 | 1834 | char * |
44867b6d BB |
1835 | zpool_default_import_path[DEFAULT_IMPORT_PATH_SIZE] = { |
1836 | "/dev/disk/by-vdev", /* Custom rules, use first if they exist */ | |
44867b6d | 1837 | "/dev/mapper", /* Use multipath devices before components */ |
cae5b340 AX |
1838 | "/dev/disk/by-partlabel", /* Single unique entry set by user */ |
1839 | "/dev/disk/by-partuuid", /* Generated partition uuid */ | |
1840 | "/dev/disk/by-label", /* Custom persistent labels */ | |
44867b6d BB |
1841 | "/dev/disk/by-uuid", /* Single unique entry and persistent */ |
1842 | "/dev/disk/by-id", /* May be multiple entries and persistent */ | |
1843 | "/dev/disk/by-path", /* Encodes physical location and persistent */ | |
44867b6d BB |
1844 | "/dev" /* UNSAFE device names will change */ |
1845 | }; | |
1846 | ||
34dc7c2f BB |
1847 | /* |
1848 | * Given a list of directories to search, find all pools stored on disk. This | |
1849 | * includes partial pools which are not available to import. If no args are | |
1850 | * given (argc is 0), then the default directory (/dev/dsk) is searched. | |
b128c09f BB |
1851 | * poolname or guid (but not both) are provided by the caller when trying |
1852 | * to import a specific pool. | |
34dc7c2f | 1853 | */ |
b128c09f | 1854 | static nvlist_t * |
428870ff | 1855 | zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg) |
34dc7c2f | 1856 | { |
cae5b340 | 1857 | nvlist_t *ret = NULL; |
34dc7c2f BB |
1858 | pool_list_t pools = { 0 }; |
1859 | pool_entry_t *pe, *penext; | |
1860 | vdev_entry_t *ve, *venext; | |
1861 | config_entry_t *ce, *cenext; | |
1862 | name_entry_t *ne, *nenext; | |
cae5b340 AX |
1863 | kmutex_t lock; |
1864 | avl_tree_t *cache; | |
1865 | rdsk_node_t *slice; | |
1866 | void *cookie; | |
1867 | taskq_t *t; | |
d603ed6c BB |
1868 | |
1869 | verify(iarg->poolname == NULL || iarg->guid == 0); | |
cae5b340 | 1870 | mutex_init(&lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 1871 | |
cae5b340 AX |
1872 | /* |
1873 | * Locate pool member vdevs using libblkid or by directory scanning. | |
1874 | * On success a newly allocated AVL tree which is populated with an | |
1875 | * entry for each discovered vdev will be returned as the cache. | |
1876 | * It's the callers responsibility to consume and destroy this tree. | |
1877 | */ | |
1878 | if (iarg->scan || iarg->paths != 0) { | |
1879 | int dirs = iarg->paths; | |
1880 | char **dir = iarg->path; | |
d603ed6c | 1881 | |
cae5b340 AX |
1882 | if (dirs == 0) { |
1883 | dir = zpool_default_import_path; | |
1884 | dirs = DEFAULT_IMPORT_PATH_SIZE; | |
1885 | } | |
44867b6d | 1886 | |
cae5b340 AX |
1887 | if (zpool_find_import_scan(hdl, &lock, &cache, dir, dirs) != 0) |
1888 | return (NULL); | |
1889 | } else { | |
1890 | if (zpool_find_import_blkid(hdl, &lock, &cache) != 0) | |
1891 | return (NULL); | |
34dc7c2f BB |
1892 | } |
1893 | ||
1894 | /* | |
cae5b340 AX |
1895 | * Create a thread pool to parallelize the process of reading and |
1896 | * validating labels, a large number of threads can be used due to | |
1897 | * minimal contention. | |
34dc7c2f | 1898 | */ |
cae5b340 AX |
1899 | t = taskq_create("z_import", 2 * boot_ncpus, defclsyspri, |
1900 | 2 * boot_ncpus, INT_MAX, TASKQ_PREPOPULATE); | |
34dc7c2f | 1901 | |
cae5b340 AX |
1902 | for (slice = avl_first(cache); slice; |
1903 | (slice = avl_walk(cache, slice, AVL_AFTER))) | |
1904 | (void) taskq_dispatch(t, zpool_open_func, slice, TQ_SLEEP); | |
34dc7c2f | 1905 | |
cae5b340 AX |
1906 | taskq_wait(t); |
1907 | taskq_destroy(t); | |
34dc7c2f | 1908 | |
cae5b340 AX |
1909 | /* |
1910 | * Process the cache filtering out any entries which are not | |
1911 | * for the specificed pool then adding matching label configs. | |
1912 | */ | |
1913 | cookie = NULL; | |
1914 | while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { | |
1915 | if (slice->rn_config != NULL) { | |
1916 | nvlist_t *config = slice->rn_config; | |
1917 | boolean_t matched = B_TRUE; | |
1918 | boolean_t aux = B_FALSE; | |
1919 | int fd; | |
d603ed6c BB |
1920 | |
1921 | /* | |
cae5b340 AX |
1922 | * Check if it's a spare or l2cache device. If it is, |
1923 | * we need to skip the name and guid check since they | |
1924 | * don't exist on aux device label. | |
d603ed6c | 1925 | */ |
cae5b340 AX |
1926 | if (iarg->poolname != NULL || iarg->guid != 0) { |
1927 | uint64_t state; | |
1928 | aux = nvlist_lookup_uint64(config, | |
1929 | ZPOOL_CONFIG_POOL_STATE, &state) == 0 && | |
1930 | (state == POOL_STATE_SPARE || | |
1931 | state == POOL_STATE_L2CACHE); | |
d603ed6c BB |
1932 | } |
1933 | ||
cae5b340 | 1934 | if (iarg->poolname != NULL && !aux) { |
30b937ee | 1935 | char *pname; |
b128c09f | 1936 | |
cae5b340 AX |
1937 | matched = nvlist_lookup_string(config, |
1938 | ZPOOL_CONFIG_POOL_NAME, &pname) == 0 && | |
1939 | strcmp(iarg->poolname, pname) == 0; | |
1940 | } else if (iarg->guid != 0 && !aux) { | |
1941 | uint64_t this_guid; | |
1942 | ||
1943 | matched = nvlist_lookup_uint64(config, | |
1944 | ZPOOL_CONFIG_POOL_GUID, &this_guid) == 0 && | |
1945 | iarg->guid == this_guid; | |
1946 | } | |
1947 | if (!matched) { | |
1948 | nvlist_free(config); | |
1949 | } else { | |
22929307 | 1950 | /* |
cae5b340 AX |
1951 | * Verify all remaining entries can be opened |
1952 | * exclusively. This will prune all underlying | |
1953 | * multipath devices which otherwise could | |
1954 | * result in the vdev appearing as UNAVAIL. | |
1955 | * | |
1956 | * Under zdb, this step isn't required and | |
1957 | * would prevent a zdb -e of active pools with | |
1958 | * no cachefile. | |
22929307 | 1959 | */ |
cae5b340 AX |
1960 | fd = open(slice->rn_name, O_RDONLY | O_EXCL); |
1961 | if (fd >= 0 || iarg->can_be_active) { | |
1962 | if (fd >= 0) | |
1963 | close(fd); | |
1964 | add_config(hdl, &pools, | |
1965 | slice->rn_name, slice->rn_order, | |
1966 | slice->rn_num_labels, config); | |
1967 | } else { | |
b128c09f | 1968 | nvlist_free(config); |
b128c09f | 1969 | } |
34dc7c2f BB |
1970 | } |
1971 | } | |
cae5b340 AX |
1972 | free(slice->rn_name); |
1973 | free(slice); | |
34dc7c2f | 1974 | } |
cae5b340 AX |
1975 | avl_destroy(cache); |
1976 | free(cache); | |
1977 | mutex_destroy(&lock); | |
34dc7c2f | 1978 | |
428870ff | 1979 | ret = get_configs(hdl, &pools, iarg->can_be_active); |
34dc7c2f | 1980 | |
34dc7c2f BB |
1981 | for (pe = pools.pools; pe != NULL; pe = penext) { |
1982 | penext = pe->pe_next; | |
1983 | for (ve = pe->pe_vdevs; ve != NULL; ve = venext) { | |
1984 | venext = ve->ve_next; | |
1985 | for (ce = ve->ve_configs; ce != NULL; ce = cenext) { | |
1986 | cenext = ce->ce_next; | |
cae5b340 | 1987 | nvlist_free(ce->ce_config); |
34dc7c2f BB |
1988 | free(ce); |
1989 | } | |
1990 | free(ve); | |
1991 | } | |
1992 | free(pe); | |
1993 | } | |
1994 | ||
1995 | for (ne = pools.names; ne != NULL; ne = nenext) { | |
1996 | nenext = ne->ne_next; | |
cae5b340 | 1997 | free(ne->ne_name); |
34dc7c2f BB |
1998 | free(ne); |
1999 | } | |
2000 | ||
34dc7c2f BB |
2001 | return (ret); |
2002 | } | |
2003 | ||
b128c09f BB |
2004 | nvlist_t * |
2005 | zpool_find_import(libzfs_handle_t *hdl, int argc, char **argv) | |
2006 | { | |
428870ff | 2007 | importargs_t iarg = { 0 }; |
b128c09f | 2008 | |
428870ff BB |
2009 | iarg.paths = argc; |
2010 | iarg.path = argv; | |
b128c09f | 2011 | |
428870ff | 2012 | return (zpool_find_import_impl(hdl, &iarg)); |
b128c09f BB |
2013 | } |
2014 | ||
34dc7c2f BB |
2015 | /* |
2016 | * Given a cache file, return the contents as a list of importable pools. | |
b128c09f BB |
2017 | * poolname or guid (but not both) are provided by the caller when trying |
2018 | * to import a specific pool. | |
34dc7c2f BB |
2019 | */ |
2020 | nvlist_t * | |
2021 | zpool_find_import_cached(libzfs_handle_t *hdl, const char *cachefile, | |
b128c09f | 2022 | char *poolname, uint64_t guid) |
34dc7c2f BB |
2023 | { |
2024 | char *buf; | |
2025 | int fd; | |
2026 | struct stat64 statbuf; | |
2027 | nvlist_t *raw, *src, *dst; | |
2028 | nvlist_t *pools; | |
2029 | nvpair_t *elem; | |
2030 | char *name; | |
b128c09f | 2031 | uint64_t this_guid; |
34dc7c2f BB |
2032 | boolean_t active; |
2033 | ||
b128c09f BB |
2034 | verify(poolname == NULL || guid == 0); |
2035 | ||
34dc7c2f BB |
2036 | if ((fd = open(cachefile, O_RDONLY)) < 0) { |
2037 | zfs_error_aux(hdl, "%s", strerror(errno)); | |
2038 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2039 | dgettext(TEXT_DOMAIN, "failed to open cache file")); | |
2040 | return (NULL); | |
2041 | } | |
2042 | ||
2043 | if (fstat64(fd, &statbuf) != 0) { | |
2044 | zfs_error_aux(hdl, "%s", strerror(errno)); | |
2045 | (void) close(fd); | |
2046 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2047 | dgettext(TEXT_DOMAIN, "failed to get size of cache file")); | |
2048 | return (NULL); | |
2049 | } | |
2050 | ||
2051 | if ((buf = zfs_alloc(hdl, statbuf.st_size)) == NULL) { | |
2052 | (void) close(fd); | |
2053 | return (NULL); | |
2054 | } | |
2055 | ||
2056 | if (read(fd, buf, statbuf.st_size) != statbuf.st_size) { | |
2057 | (void) close(fd); | |
2058 | free(buf); | |
2059 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2060 | dgettext(TEXT_DOMAIN, | |
2061 | "failed to read cache file contents")); | |
2062 | return (NULL); | |
2063 | } | |
2064 | ||
2065 | (void) close(fd); | |
2066 | ||
2067 | if (nvlist_unpack(buf, statbuf.st_size, &raw, 0) != 0) { | |
2068 | free(buf); | |
2069 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2070 | dgettext(TEXT_DOMAIN, | |
2071 | "invalid or corrupt cache file contents")); | |
2072 | return (NULL); | |
2073 | } | |
2074 | ||
2075 | free(buf); | |
2076 | ||
2077 | /* | |
2078 | * Go through and get the current state of the pools and refresh their | |
2079 | * state. | |
2080 | */ | |
2081 | if (nvlist_alloc(&pools, 0, 0) != 0) { | |
2082 | (void) no_memory(hdl); | |
2083 | nvlist_free(raw); | |
2084 | return (NULL); | |
2085 | } | |
2086 | ||
2087 | elem = NULL; | |
2088 | while ((elem = nvlist_next_nvpair(raw, elem)) != NULL) { | |
ea04106b | 2089 | src = fnvpair_value_nvlist(elem); |
34dc7c2f | 2090 | |
ea04106b | 2091 | name = fnvlist_lookup_string(src, ZPOOL_CONFIG_POOL_NAME); |
b128c09f BB |
2092 | if (poolname != NULL && strcmp(poolname, name) != 0) |
2093 | continue; | |
2094 | ||
ea04106b AX |
2095 | this_guid = fnvlist_lookup_uint64(src, ZPOOL_CONFIG_POOL_GUID); |
2096 | if (guid != 0 && guid != this_guid) | |
2097 | continue; | |
34dc7c2f | 2098 | |
b128c09f BB |
2099 | if (pool_active(hdl, name, this_guid, &active) != 0) { |
2100 | nvlist_free(raw); | |
2101 | nvlist_free(pools); | |
2102 | return (NULL); | |
2103 | } | |
34dc7c2f | 2104 | |
b128c09f BB |
2105 | if (active) |
2106 | continue; | |
34dc7c2f | 2107 | |
b128c09f BB |
2108 | if ((dst = refresh_config(hdl, src)) == NULL) { |
2109 | nvlist_free(raw); | |
2110 | nvlist_free(pools); | |
2111 | return (NULL); | |
2112 | } | |
34dc7c2f | 2113 | |
b128c09f BB |
2114 | if (nvlist_add_nvlist(pools, nvpair_name(elem), dst) != 0) { |
2115 | (void) no_memory(hdl); | |
34dc7c2f | 2116 | nvlist_free(dst); |
b128c09f BB |
2117 | nvlist_free(raw); |
2118 | nvlist_free(pools); | |
2119 | return (NULL); | |
34dc7c2f | 2120 | } |
b128c09f | 2121 | nvlist_free(dst); |
34dc7c2f BB |
2122 | } |
2123 | ||
2124 | nvlist_free(raw); | |
2125 | return (pools); | |
2126 | } | |
2127 | ||
428870ff BB |
2128 | static int |
2129 | name_or_guid_exists(zpool_handle_t *zhp, void *data) | |
2130 | { | |
2131 | importargs_t *import = data; | |
2132 | int found = 0; | |
2133 | ||
2134 | if (import->poolname != NULL) { | |
2135 | char *pool_name; | |
2136 | ||
2137 | verify(nvlist_lookup_string(zhp->zpool_config, | |
2138 | ZPOOL_CONFIG_POOL_NAME, &pool_name) == 0); | |
2139 | if (strcmp(pool_name, import->poolname) == 0) | |
2140 | found = 1; | |
2141 | } else { | |
2142 | uint64_t pool_guid; | |
2143 | ||
2144 | verify(nvlist_lookup_uint64(zhp->zpool_config, | |
2145 | ZPOOL_CONFIG_POOL_GUID, &pool_guid) == 0); | |
2146 | if (pool_guid == import->guid) | |
2147 | found = 1; | |
2148 | } | |
2149 | ||
2150 | zpool_close(zhp); | |
2151 | return (found); | |
2152 | } | |
2153 | ||
2154 | nvlist_t * | |
2155 | zpool_search_import(libzfs_handle_t *hdl, importargs_t *import) | |
2156 | { | |
2157 | verify(import->poolname == NULL || import->guid == 0); | |
2158 | ||
2159 | if (import->unique) | |
2160 | import->exists = zpool_iter(hdl, name_or_guid_exists, import); | |
2161 | ||
2162 | if (import->cachefile != NULL) | |
2163 | return (zpool_find_import_cached(hdl, import->cachefile, | |
2164 | import->poolname, import->guid)); | |
2165 | ||
2166 | return (zpool_find_import_impl(hdl, import)); | |
2167 | } | |
34dc7c2f | 2168 | |
cae5b340 AX |
2169 | static boolean_t |
2170 | pool_match(nvlist_t *cfg, char *tgt) | |
2171 | { | |
2172 | uint64_t v, guid = strtoull(tgt, NULL, 0); | |
2173 | char *s; | |
2174 | ||
2175 | if (guid != 0) { | |
2176 | if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0) | |
2177 | return (v == guid); | |
2178 | } else { | |
2179 | if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0) | |
2180 | return (strcmp(s, tgt) == 0); | |
2181 | } | |
2182 | return (B_FALSE); | |
2183 | } | |
2184 | ||
2185 | int | |
2186 | zpool_tryimport(libzfs_handle_t *hdl, char *target, nvlist_t **configp, | |
2187 | importargs_t *args) | |
2188 | { | |
2189 | nvlist_t *pools; | |
2190 | nvlist_t *match = NULL; | |
2191 | nvlist_t *config = NULL; | |
2192 | char *name = NULL, *sepp = NULL; | |
2193 | char sep = '\0'; | |
2194 | int count = 0; | |
2195 | char *targetdup = strdup(target); | |
2196 | ||
2197 | *configp = NULL; | |
2198 | ||
2199 | if ((sepp = strpbrk(targetdup, "/@")) != NULL) { | |
2200 | sep = *sepp; | |
2201 | *sepp = '\0'; | |
2202 | } | |
2203 | ||
2204 | pools = zpool_search_import(hdl, args); | |
2205 | ||
2206 | if (pools != NULL) { | |
2207 | nvpair_t *elem = NULL; | |
2208 | while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) { | |
2209 | VERIFY0(nvpair_value_nvlist(elem, &config)); | |
2210 | if (pool_match(config, targetdup)) { | |
2211 | count++; | |
2212 | if (match != NULL) { | |
2213 | /* multiple matches found */ | |
2214 | continue; | |
2215 | } else { | |
2216 | match = config; | |
2217 | name = nvpair_name(elem); | |
2218 | } | |
2219 | } | |
2220 | } | |
2221 | } | |
2222 | ||
2223 | if (count == 0) { | |
2224 | (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2225 | "no pools found")); | |
2226 | free(targetdup); | |
2227 | return (ENOENT); | |
2228 | } | |
2229 | ||
2230 | if (count > 1) { | |
2231 | (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2232 | "%d pools found, use pool GUID\n"), count); | |
2233 | free(targetdup); | |
2234 | return (EINVAL); | |
2235 | } | |
2236 | ||
2237 | *configp = match; | |
2238 | free(targetdup); | |
2239 | ||
2240 | return (0); | |
2241 | } | |
2242 | ||
34dc7c2f BB |
2243 | boolean_t |
2244 | find_guid(nvlist_t *nv, uint64_t guid) | |
2245 | { | |
2246 | uint64_t tmp; | |
2247 | nvlist_t **child; | |
2248 | uint_t c, children; | |
2249 | ||
2250 | verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &tmp) == 0); | |
2251 | if (tmp == guid) | |
2252 | return (B_TRUE); | |
2253 | ||
2254 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
2255 | &child, &children) == 0) { | |
2256 | for (c = 0; c < children; c++) | |
2257 | if (find_guid(child[c], guid)) | |
2258 | return (B_TRUE); | |
2259 | } | |
2260 | ||
2261 | return (B_FALSE); | |
2262 | } | |
2263 | ||
2264 | typedef struct aux_cbdata { | |
2265 | const char *cb_type; | |
2266 | uint64_t cb_guid; | |
2267 | zpool_handle_t *cb_zhp; | |
2268 | } aux_cbdata_t; | |
2269 | ||
2270 | static int | |
2271 | find_aux(zpool_handle_t *zhp, void *data) | |
2272 | { | |
2273 | aux_cbdata_t *cbp = data; | |
2274 | nvlist_t **list; | |
2275 | uint_t i, count; | |
2276 | uint64_t guid; | |
2277 | nvlist_t *nvroot; | |
2278 | ||
2279 | verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE, | |
2280 | &nvroot) == 0); | |
2281 | ||
2282 | if (nvlist_lookup_nvlist_array(nvroot, cbp->cb_type, | |
2283 | &list, &count) == 0) { | |
2284 | for (i = 0; i < count; i++) { | |
2285 | verify(nvlist_lookup_uint64(list[i], | |
2286 | ZPOOL_CONFIG_GUID, &guid) == 0); | |
2287 | if (guid == cbp->cb_guid) { | |
2288 | cbp->cb_zhp = zhp; | |
2289 | return (1); | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | zpool_close(zhp); | |
2295 | return (0); | |
2296 | } | |
2297 | ||
2298 | /* | |
2299 | * Determines if the pool is in use. If so, it returns true and the state of | |
8ec27e97 | 2300 | * the pool as well as the name of the pool. Name string is allocated and |
34dc7c2f BB |
2301 | * must be freed by the caller. |
2302 | */ | |
2303 | int | |
2304 | zpool_in_use(libzfs_handle_t *hdl, int fd, pool_state_t *state, char **namestr, | |
2305 | boolean_t *inuse) | |
2306 | { | |
2307 | nvlist_t *config; | |
2308 | char *name; | |
2309 | boolean_t ret; | |
2310 | uint64_t guid, vdev_guid; | |
2311 | zpool_handle_t *zhp; | |
2312 | nvlist_t *pool_config; | |
2313 | uint64_t stateval, isspare; | |
2314 | aux_cbdata_t cb = { 0 }; | |
2315 | boolean_t isactive; | |
2316 | ||
2317 | *inuse = B_FALSE; | |
2318 | ||
ea04106b | 2319 | if (zpool_read_label(fd, &config, NULL) != 0) { |
34dc7c2f BB |
2320 | (void) no_memory(hdl); |
2321 | return (-1); | |
2322 | } | |
2323 | ||
2324 | if (config == NULL) | |
2325 | return (0); | |
2326 | ||
2327 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
2328 | &stateval) == 0); | |
2329 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, | |
2330 | &vdev_guid) == 0); | |
2331 | ||
2332 | if (stateval != POOL_STATE_SPARE && stateval != POOL_STATE_L2CACHE) { | |
2333 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
2334 | &name) == 0); | |
2335 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
2336 | &guid) == 0); | |
2337 | } | |
2338 | ||
2339 | switch (stateval) { | |
2340 | case POOL_STATE_EXPORTED: | |
572e2857 BB |
2341 | /* |
2342 | * A pool with an exported state may in fact be imported | |
2343 | * read-only, so check the in-core state to see if it's | |
2344 | * active and imported read-only. If it is, set | |
2345 | * its state to active. | |
2346 | */ | |
2347 | if (pool_active(hdl, name, guid, &isactive) == 0 && isactive && | |
e10b0808 AX |
2348 | (zhp = zpool_open_canfail(hdl, name)) != NULL) { |
2349 | if (zpool_get_prop_int(zhp, ZPOOL_PROP_READONLY, NULL)) | |
2350 | stateval = POOL_STATE_ACTIVE; | |
2351 | ||
2352 | /* | |
2353 | * All we needed the zpool handle for is the | |
2354 | * readonly prop check. | |
2355 | */ | |
2356 | zpool_close(zhp); | |
2357 | } | |
572e2857 | 2358 | |
34dc7c2f BB |
2359 | ret = B_TRUE; |
2360 | break; | |
2361 | ||
2362 | case POOL_STATE_ACTIVE: | |
2363 | /* | |
2364 | * For an active pool, we have to determine if it's really part | |
2365 | * of a currently active pool (in which case the pool will exist | |
2366 | * and the guid will be the same), or whether it's part of an | |
2367 | * active pool that was disconnected without being explicitly | |
2368 | * exported. | |
2369 | */ | |
2370 | if (pool_active(hdl, name, guid, &isactive) != 0) { | |
2371 | nvlist_free(config); | |
2372 | return (-1); | |
2373 | } | |
2374 | ||
2375 | if (isactive) { | |
2376 | /* | |
2377 | * Because the device may have been removed while | |
2378 | * offlined, we only report it as active if the vdev is | |
2379 | * still present in the config. Otherwise, pretend like | |
2380 | * it's not in use. | |
2381 | */ | |
2382 | if ((zhp = zpool_open_canfail(hdl, name)) != NULL && | |
2383 | (pool_config = zpool_get_config(zhp, NULL)) | |
2384 | != NULL) { | |
2385 | nvlist_t *nvroot; | |
2386 | ||
2387 | verify(nvlist_lookup_nvlist(pool_config, | |
2388 | ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
2389 | ret = find_guid(nvroot, vdev_guid); | |
2390 | } else { | |
2391 | ret = B_FALSE; | |
2392 | } | |
2393 | ||
2394 | /* | |
2395 | * If this is an active spare within another pool, we | |
2396 | * treat it like an unused hot spare. This allows the | |
2397 | * user to create a pool with a hot spare that currently | |
2398 | * in use within another pool. Since we return B_TRUE, | |
2399 | * libdiskmgt will continue to prevent generic consumers | |
2400 | * from using the device. | |
2401 | */ | |
2402 | if (ret && nvlist_lookup_uint64(config, | |
2403 | ZPOOL_CONFIG_IS_SPARE, &isspare) == 0 && isspare) | |
2404 | stateval = POOL_STATE_SPARE; | |
2405 | ||
2406 | if (zhp != NULL) | |
2407 | zpool_close(zhp); | |
2408 | } else { | |
2409 | stateval = POOL_STATE_POTENTIALLY_ACTIVE; | |
2410 | ret = B_TRUE; | |
2411 | } | |
2412 | break; | |
2413 | ||
2414 | case POOL_STATE_SPARE: | |
2415 | /* | |
2416 | * For a hot spare, it can be either definitively in use, or | |
2417 | * potentially active. To determine if it's in use, we iterate | |
2418 | * over all pools in the system and search for one with a spare | |
2419 | * with a matching guid. | |
2420 | * | |
2421 | * Due to the shared nature of spares, we don't actually report | |
2422 | * the potentially active case as in use. This means the user | |
2423 | * can freely create pools on the hot spares of exported pools, | |
2424 | * but to do otherwise makes the resulting code complicated, and | |
2425 | * we end up having to deal with this case anyway. | |
2426 | */ | |
2427 | cb.cb_zhp = NULL; | |
2428 | cb.cb_guid = vdev_guid; | |
2429 | cb.cb_type = ZPOOL_CONFIG_SPARES; | |
2430 | if (zpool_iter(hdl, find_aux, &cb) == 1) { | |
2431 | name = (char *)zpool_get_name(cb.cb_zhp); | |
cae5b340 | 2432 | ret = B_TRUE; |
34dc7c2f | 2433 | } else { |
cae5b340 | 2434 | ret = B_FALSE; |
34dc7c2f BB |
2435 | } |
2436 | break; | |
2437 | ||
2438 | case POOL_STATE_L2CACHE: | |
2439 | ||
2440 | /* | |
2441 | * Check if any pool is currently using this l2cache device. | |
2442 | */ | |
2443 | cb.cb_zhp = NULL; | |
2444 | cb.cb_guid = vdev_guid; | |
2445 | cb.cb_type = ZPOOL_CONFIG_L2CACHE; | |
2446 | if (zpool_iter(hdl, find_aux, &cb) == 1) { | |
2447 | name = (char *)zpool_get_name(cb.cb_zhp); | |
cae5b340 | 2448 | ret = B_TRUE; |
34dc7c2f | 2449 | } else { |
cae5b340 | 2450 | ret = B_FALSE; |
34dc7c2f BB |
2451 | } |
2452 | break; | |
2453 | ||
2454 | default: | |
2455 | ret = B_FALSE; | |
2456 | } | |
2457 | ||
2458 | ||
2459 | if (ret) { | |
2460 | if ((*namestr = zfs_strdup(hdl, name)) == NULL) { | |
2461 | if (cb.cb_zhp) | |
2462 | zpool_close(cb.cb_zhp); | |
2463 | nvlist_free(config); | |
2464 | return (-1); | |
2465 | } | |
2466 | *state = (pool_state_t)stateval; | |
2467 | } | |
2468 | ||
2469 | if (cb.cb_zhp) | |
2470 | zpool_close(cb.cb_zhp); | |
2471 | ||
2472 | nvlist_free(config); | |
2473 | *inuse = ret; | |
2474 | return (0); | |
2475 | } |