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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. |
42f7b73b | 24 | * Copyright (c) 2012, 2018 by Delphix. All rights reserved. |
cae5b340 AX |
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 | } | |
42f7b73b AX |
145 | |
146 | /* | |
147 | * NVME 'by-id' symlinks are similar to bus case | |
148 | */ | |
149 | struct udev_device *parent; | |
150 | ||
151 | parent = udev_device_get_parent_with_subsystem_devtype(dev, | |
152 | "nvme", NULL); | |
153 | if (parent != NULL) | |
154 | bus = "nvme"; /* continue with bus symlink search */ | |
155 | else | |
156 | return (ENODATA); | |
34dc7c2f | 157 | } |
cae5b340 AX |
158 | |
159 | /* | |
160 | * locate the bus specific by-id link | |
161 | */ | |
162 | (void) snprintf(devbyid, sizeof (devbyid), "%s%s-", DEV_BYID_PATH, bus); | |
163 | entry = udev_device_get_devlinks_list_entry(dev); | |
164 | while (entry != NULL) { | |
165 | const char *name; | |
166 | ||
167 | name = udev_list_entry_get_name(entry); | |
168 | if (strncmp(name, devbyid, strlen(devbyid)) == 0) { | |
169 | name += strlen(DEV_BYID_PATH); | |
170 | (void) strlcpy(bufptr, name, buflen); | |
171 | return (0); | |
172 | } | |
173 | entry = udev_list_entry_get_next(entry); | |
174 | } | |
175 | ||
176 | return (ENODATA); | |
177 | } | |
178 | ||
179 | /* | |
180 | * Obtain the persistent physical location string (describes where) | |
181 | * | |
182 | * used by ZED vdev matching for auto-{online,expand,replace} | |
183 | */ | |
184 | int | |
185 | zfs_device_get_physical(struct udev_device *dev, char *bufptr, size_t buflen) | |
186 | { | |
187 | const char *physpath = NULL; | |
188 | ||
189 | /* | |
190 | * Normal disks use ID_PATH for their physical path. Device mapper | |
191 | * devices are virtual and don't have a physical path. For them we | |
192 | * use ID_VDEV instead, which is setup via the /etc/vdev_id.conf file. | |
193 | * ID_VDEV provides a persistent path to a virtual device. If you | |
194 | * don't have vdev_id.conf setup, you cannot use multipath autoreplace. | |
195 | */ | |
196 | if (!((physpath = udev_device_get_property_value(dev, "ID_PATH")) && | |
197 | physpath[0])) { | |
198 | if (!((physpath = | |
199 | udev_device_get_property_value(dev, "ID_VDEV")) && | |
200 | physpath[0])) { | |
201 | return (ENODATA); | |
202 | } | |
203 | } | |
204 | ||
205 | (void) strlcpy(bufptr, physpath, buflen); | |
206 | ||
207 | return (0); | |
208 | } | |
209 | ||
210 | boolean_t | |
211 | udev_is_mpath(struct udev_device *dev) | |
212 | { | |
213 | return udev_device_get_property_value(dev, "DM_UUID") && | |
214 | udev_device_get_property_value(dev, "MPATH_SBIN_PATH"); | |
215 | } | |
216 | ||
217 | /* | |
218 | * A disk is considered a multipath whole disk when: | |
219 | * DEVNAME key value has "dm-" | |
220 | * DM_NAME key value has "mpath" prefix | |
221 | * DM_UUID key exists | |
222 | * ID_PART_TABLE_TYPE key does not exist or is not gpt | |
223 | */ | |
224 | static boolean_t | |
225 | udev_mpath_whole_disk(struct udev_device *dev) | |
226 | { | |
227 | const char *devname, *type, *uuid; | |
228 | ||
229 | devname = udev_device_get_property_value(dev, "DEVNAME"); | |
230 | type = udev_device_get_property_value(dev, "ID_PART_TABLE_TYPE"); | |
231 | uuid = udev_device_get_property_value(dev, "DM_UUID"); | |
232 | ||
233 | if ((devname != NULL && strncmp(devname, "/dev/dm-", 8) == 0) && | |
234 | ((type == NULL) || (strcmp(type, "gpt") != 0)) && | |
235 | (uuid != NULL)) { | |
236 | return (B_TRUE); | |
237 | } | |
238 | ||
239 | return (B_FALSE); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Check if a disk is effectively a multipath whole disk | |
244 | */ | |
245 | boolean_t | |
246 | is_mpath_whole_disk(const char *path) | |
247 | { | |
248 | struct udev *udev; | |
249 | struct udev_device *dev = NULL; | |
250 | char nodepath[MAXPATHLEN]; | |
251 | char *sysname; | |
252 | boolean_t wholedisk = B_FALSE; | |
253 | ||
254 | if (realpath(path, nodepath) == NULL) | |
255 | return (B_FALSE); | |
256 | sysname = strrchr(nodepath, '/') + 1; | |
257 | if (strncmp(sysname, "dm-", 3) != 0) | |
258 | return (B_FALSE); | |
259 | if ((udev = udev_new()) == NULL) | |
260 | return (B_FALSE); | |
261 | if ((dev = udev_device_new_from_subsystem_sysname(udev, "block", | |
262 | sysname)) == NULL) { | |
263 | udev_device_unref(dev); | |
264 | return (B_FALSE); | |
265 | } | |
266 | ||
267 | wholedisk = udev_mpath_whole_disk(dev); | |
268 | ||
269 | udev_device_unref(dev); | |
270 | return (wholedisk); | |
271 | } | |
272 | ||
273 | static int | |
274 | udev_device_is_ready(struct udev_device *dev) | |
275 | { | |
276 | #ifdef HAVE_LIBUDEV_UDEV_DEVICE_GET_IS_INITIALIZED | |
277 | return (udev_device_get_is_initialized(dev)); | |
278 | #else | |
279 | /* wait for DEVLINKS property to be initialized */ | |
280 | return (udev_device_get_property_value(dev, "DEVLINKS") != NULL); | |
281 | #endif | |
282 | } | |
283 | ||
284 | /* | |
285 | * Wait up to timeout_ms for udev to set up the device node. The device is | |
286 | * considered ready when libudev determines it has been initialized, all of | |
287 | * the device links have been verified to exist, and it has been allowed to | |
288 | * settle. At this point the device the device can be accessed reliably. | |
289 | * Depending on the complexity of the udev rules this process could take | |
290 | * several seconds. | |
291 | */ | |
292 | int | |
293 | zpool_label_disk_wait(char *path, int timeout_ms) | |
294 | { | |
295 | struct udev *udev; | |
296 | struct udev_device *dev = NULL; | |
297 | char nodepath[MAXPATHLEN]; | |
298 | char *sysname = NULL; | |
299 | int ret = ENODEV; | |
300 | int settle_ms = 50; | |
301 | long sleep_ms = 10; | |
302 | hrtime_t start, settle; | |
303 | ||
304 | if ((udev = udev_new()) == NULL) | |
305 | return (ENXIO); | |
306 | ||
307 | start = gethrtime(); | |
308 | settle = 0; | |
309 | ||
310 | do { | |
311 | if (sysname == NULL) { | |
312 | if (realpath(path, nodepath) != NULL) { | |
313 | sysname = strrchr(nodepath, '/') + 1; | |
314 | } else { | |
315 | (void) usleep(sleep_ms * MILLISEC); | |
316 | continue; | |
317 | } | |
318 | } | |
319 | ||
320 | dev = udev_device_new_from_subsystem_sysname(udev, | |
321 | "block", sysname); | |
322 | if ((dev != NULL) && udev_device_is_ready(dev)) { | |
047218e2 | 323 | struct udev_list_entry *links, *link = NULL; |
cae5b340 AX |
324 | |
325 | ret = 0; | |
326 | links = udev_device_get_devlinks_list_entry(dev); | |
327 | ||
328 | udev_list_entry_foreach(link, links) { | |
329 | struct stat64 statbuf; | |
330 | const char *name; | |
331 | ||
332 | name = udev_list_entry_get_name(link); | |
333 | errno = 0; | |
334 | if (stat64(name, &statbuf) == 0 && errno == 0) | |
335 | continue; | |
336 | ||
337 | settle = 0; | |
338 | ret = ENODEV; | |
339 | break; | |
340 | } | |
341 | ||
342 | if (ret == 0) { | |
343 | if (settle == 0) { | |
344 | settle = gethrtime(); | |
345 | } else if (NSEC2MSEC(gethrtime() - settle) >= | |
346 | settle_ms) { | |
347 | udev_device_unref(dev); | |
348 | break; | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | udev_device_unref(dev); | |
354 | (void) usleep(sleep_ms * MILLISEC); | |
355 | ||
356 | } while (NSEC2MSEC(gethrtime() - start) < timeout_ms); | |
357 | ||
358 | udev_unref(udev); | |
359 | ||
360 | return (ret); | |
361 | } | |
362 | ||
363 | ||
364 | /* | |
365 | * Encode the persistent devices strings | |
366 | * used for the vdev disk label | |
367 | */ | |
368 | static int | |
369 | encode_device_strings(const char *path, vdev_dev_strs_t *ds, | |
370 | boolean_t wholedisk) | |
371 | { | |
372 | struct udev *udev; | |
373 | struct udev_device *dev = NULL; | |
374 | char nodepath[MAXPATHLEN]; | |
375 | char *sysname; | |
376 | int ret = ENODEV; | |
377 | hrtime_t start; | |
378 | ||
379 | if ((udev = udev_new()) == NULL) | |
380 | return (ENXIO); | |
381 | ||
382 | /* resolve path to a runtime device node instance */ | |
383 | if (realpath(path, nodepath) == NULL) | |
384 | goto no_dev; | |
385 | ||
386 | sysname = strrchr(nodepath, '/') + 1; | |
387 | ||
388 | /* | |
389 | * Wait up to 3 seconds for udev to set up the device node context | |
390 | */ | |
391 | start = gethrtime(); | |
392 | do { | |
393 | dev = udev_device_new_from_subsystem_sysname(udev, "block", | |
394 | sysname); | |
395 | if (dev == NULL) | |
396 | goto no_dev; | |
397 | if (udev_device_is_ready(dev)) | |
398 | break; /* udev ready */ | |
399 | ||
400 | udev_device_unref(dev); | |
401 | dev = NULL; | |
402 | ||
403 | if (NSEC2MSEC(gethrtime() - start) < 10) | |
404 | (void) sched_yield(); /* yield/busy wait up to 10ms */ | |
405 | else | |
406 | (void) usleep(10 * MILLISEC); | |
407 | ||
408 | } while (NSEC2MSEC(gethrtime() - start) < (3 * MILLISEC)); | |
409 | ||
410 | if (dev == NULL) | |
411 | goto no_dev; | |
412 | ||
413 | /* | |
414 | * Only whole disks require extra device strings | |
415 | */ | |
416 | if (!wholedisk && !udev_mpath_whole_disk(dev)) | |
417 | goto no_dev; | |
418 | ||
419 | ret = zfs_device_get_devid(dev, ds->vds_devid, sizeof (ds->vds_devid)); | |
420 | if (ret != 0) | |
421 | goto no_dev_ref; | |
422 | ||
423 | /* physical location string (optional) */ | |
424 | if (zfs_device_get_physical(dev, ds->vds_devphys, | |
425 | sizeof (ds->vds_devphys)) != 0) { | |
426 | ds->vds_devphys[0] = '\0'; /* empty string --> not available */ | |
427 | } | |
428 | ||
429 | no_dev_ref: | |
430 | udev_device_unref(dev); | |
431 | no_dev: | |
432 | udev_unref(udev); | |
34dc7c2f BB |
433 | |
434 | return (ret); | |
435 | } | |
436 | ||
cae5b340 AX |
437 | /* |
438 | * Update a leaf vdev's persistent device strings (Linux only) | |
439 | * | |
440 | * - only applies for a dedicated leaf vdev (aka whole disk) | |
441 | * - updated during pool create|add|attach|import | |
442 | * - used for matching device matching during auto-{online,expand,replace} | |
443 | * - stored in a leaf disk config label (i.e. alongside 'path' NVP) | |
444 | * - these strings are currently not used in kernel (i.e. for vdev_disk_open) | |
445 | * | |
446 | * single device node example: | |
447 | * devid: 'scsi-MG03SCA300_350000494a8cb3d67-part1' | |
448 | * phys_path: 'pci-0000:04:00.0-sas-0x50000394a8cb3d67-lun-0' | |
449 | * | |
450 | * multipath device node example: | |
451 | * devid: 'dm-uuid-mpath-35000c5006304de3f' | |
452 | * | |
453 | * We also store the enclosure sysfs path for turning on enclosure LEDs | |
454 | * (if applicable): | |
455 | * vdev_enc_sysfs_path: '/sys/class/enclosure/11:0:1:0/SLOT 4' | |
456 | */ | |
457 | void | |
458 | update_vdev_config_dev_strs(nvlist_t *nv) | |
459 | { | |
460 | vdev_dev_strs_t vds; | |
461 | char *env, *type, *path; | |
462 | uint64_t wholedisk = 0; | |
463 | char *upath, *spath; | |
464 | ||
465 | /* | |
466 | * For the benefit of legacy ZFS implementations, allow | |
467 | * for opting out of devid strings in the vdev label. | |
468 | * | |
469 | * example use: | |
470 | * env ZFS_VDEV_DEVID_OPT_OUT=YES zpool import dozer | |
471 | * | |
472 | * explanation: | |
473 | * Older ZFS on Linux implementations had issues when attempting to | |
474 | * display pool config VDEV names if a "devid" NVP value is present | |
475 | * in the pool's config. | |
476 | * | |
477 | * For example, a pool that originated on illumos platform would | |
478 | * have a devid value in the config and "zpool status" would fail | |
479 | * when listing the config. | |
480 | * | |
481 | * A pool can be stripped of any "devid" values on import or | |
482 | * prevented from adding them on zpool create|add by setting | |
483 | * ZFS_VDEV_DEVID_OPT_OUT. | |
484 | */ | |
485 | env = getenv("ZFS_VDEV_DEVID_OPT_OUT"); | |
486 | if (env && (strtoul(env, NULL, 0) > 0 || | |
487 | !strncasecmp(env, "YES", 3) || !strncasecmp(env, "ON", 2))) { | |
488 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_DEVID); | |
489 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_PHYS_PATH); | |
490 | return; | |
491 | } | |
492 | ||
493 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0 || | |
494 | strcmp(type, VDEV_TYPE_DISK) != 0) { | |
495 | return; | |
496 | } | |
497 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) | |
498 | return; | |
499 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, &wholedisk); | |
500 | ||
501 | /* | |
502 | * Update device string values in config nvlist | |
503 | */ | |
504 | if (encode_device_strings(path, &vds, (boolean_t)wholedisk) == 0) { | |
505 | (void) nvlist_add_string(nv, ZPOOL_CONFIG_DEVID, vds.vds_devid); | |
506 | if (vds.vds_devphys[0] != '\0') { | |
507 | (void) nvlist_add_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
508 | vds.vds_devphys); | |
509 | } | |
510 | ||
511 | /* Add enclosure sysfs path (if disk is in an enclosure) */ | |
512 | upath = zfs_get_underlying_path(path); | |
513 | spath = zfs_get_enclosure_sysfs_path(upath); | |
514 | if (spath) | |
515 | nvlist_add_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, | |
516 | spath); | |
517 | else | |
518 | nvlist_remove_all(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH); | |
519 | ||
520 | free(upath); | |
521 | free(spath); | |
522 | } else { | |
523 | /* clear out any stale entries */ | |
524 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_DEVID); | |
525 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_PHYS_PATH); | |
526 | (void) nvlist_remove_all(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH); | |
527 | } | |
528 | } | |
529 | #else | |
530 | ||
531 | boolean_t | |
532 | is_mpath_whole_disk(const char *path) | |
533 | { | |
534 | return (B_FALSE); | |
535 | } | |
536 | ||
5eacc075 AX |
537 | /* |
538 | * Wait up to timeout_ms for udev to set up the device node. The device is | |
539 | * considered ready when the provided path have been verified to exist and | |
540 | * it has been allowed to settle. At this point the device the device can | |
541 | * be accessed reliably. Depending on the complexity of the udev rules thisi | |
542 | * process could take several seconds. | |
543 | */ | |
544 | int | |
545 | zpool_label_disk_wait(char *path, int timeout_ms) | |
546 | { | |
547 | int settle_ms = 50; | |
548 | long sleep_ms = 10; | |
549 | hrtime_t start, settle; | |
550 | struct stat64 statbuf; | |
551 | ||
552 | start = gethrtime(); | |
553 | settle = 0; | |
554 | ||
555 | do { | |
556 | errno = 0; | |
557 | if ((stat64(path, &statbuf) == 0) && (errno == 0)) { | |
558 | if (settle == 0) | |
559 | settle = gethrtime(); | |
560 | else if (NSEC2MSEC(gethrtime() - settle) >= settle_ms) | |
561 | return (0); | |
562 | } else if (errno != ENOENT) { | |
563 | return (errno); | |
564 | } | |
565 | ||
566 | usleep(sleep_ms * MILLISEC); | |
567 | } while (NSEC2MSEC(gethrtime() - start) < timeout_ms); | |
568 | ||
569 | return (ENODEV); | |
570 | } | |
34dc7c2f | 571 | |
cae5b340 AX |
572 | void |
573 | update_vdev_config_dev_strs(nvlist_t *nv) | |
574 | { | |
575 | } | |
576 | ||
577 | #endif /* HAVE_LIBUDEV */ | |
578 | ||
34dc7c2f BB |
579 | /* |
580 | * Go through and fix up any path and/or devid information for the given vdev | |
581 | * configuration. | |
582 | */ | |
583 | static int | |
584 | fix_paths(nvlist_t *nv, name_entry_t *names) | |
585 | { | |
586 | nvlist_t **child; | |
587 | uint_t c, children; | |
588 | uint64_t guid; | |
589 | name_entry_t *ne, *best; | |
cae5b340 | 590 | char *path; |
34dc7c2f BB |
591 | |
592 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
593 | &child, &children) == 0) { | |
594 | for (c = 0; c < children; c++) | |
595 | if (fix_paths(child[c], names) != 0) | |
596 | return (-1); | |
597 | return (0); | |
598 | } | |
599 | ||
600 | /* | |
601 | * This is a leaf (file or disk) vdev. In either case, go through | |
602 | * the name list and see if we find a matching guid. If so, replace | |
603 | * the path and see if we can calculate a new devid. | |
604 | * | |
605 | * There may be multiple names associated with a particular guid, in | |
44867b6d BB |
606 | * which case we have overlapping partitions or multiple paths to the |
607 | * same disk. In this case we prefer to use the path name which | |
608 | * matches the ZPOOL_CONFIG_PATH. If no matching entry is found we | |
609 | * use the lowest order device which corresponds to the first match | |
610 | * while traversing the ZPOOL_IMPORT_PATH search path. | |
34dc7c2f BB |
611 | */ |
612 | verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0); | |
613 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) | |
614 | path = NULL; | |
615 | ||
34dc7c2f BB |
616 | best = NULL; |
617 | for (ne = names; ne != NULL; ne = ne->ne_next) { | |
618 | if (ne->ne_guid == guid) { | |
34dc7c2f BB |
619 | if (path == NULL) { |
620 | best = ne; | |
621 | break; | |
622 | } | |
623 | ||
44867b6d | 624 | if ((strlen(path) == strlen(ne->ne_name)) && |
a08ee875 | 625 | strncmp(path, ne->ne_name, strlen(path)) == 0) { |
34dc7c2f | 626 | best = ne; |
44867b6d | 627 | break; |
34dc7c2f | 628 | } |
44867b6d | 629 | |
ea04106b | 630 | if (best == NULL) { |
44867b6d | 631 | best = ne; |
ea04106b AX |
632 | continue; |
633 | } | |
634 | ||
635 | /* Prefer paths with move vdev labels. */ | |
636 | if (ne->ne_num_labels > best->ne_num_labels) { | |
637 | best = ne; | |
638 | continue; | |
639 | } | |
640 | ||
641 | /* Prefer paths earlier in the search order. */ | |
87dac73d | 642 | if (ne->ne_num_labels == best->ne_num_labels && |
ea04106b AX |
643 | ne->ne_order < best->ne_order) { |
644 | best = ne; | |
645 | continue; | |
646 | } | |
34dc7c2f BB |
647 | } |
648 | } | |
649 | ||
650 | if (best == NULL) | |
651 | return (0); | |
652 | ||
653 | if (nvlist_add_string(nv, ZPOOL_CONFIG_PATH, best->ne_name) != 0) | |
654 | return (-1); | |
655 | ||
cae5b340 AX |
656 | /* Linux only - update ZPOOL_CONFIG_DEVID and ZPOOL_CONFIG_PHYS_PATH */ |
657 | update_vdev_config_dev_strs(nv); | |
34dc7c2f BB |
658 | |
659 | return (0); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Add the given configuration to the list of known devices. | |
664 | */ | |
665 | static int | |
666 | add_config(libzfs_handle_t *hdl, pool_list_t *pl, const char *path, | |
ea04106b | 667 | int order, int num_labels, nvlist_t *config) |
34dc7c2f BB |
668 | { |
669 | uint64_t pool_guid, vdev_guid, top_guid, txg, state; | |
670 | pool_entry_t *pe; | |
671 | vdev_entry_t *ve; | |
672 | config_entry_t *ce; | |
673 | name_entry_t *ne; | |
674 | ||
675 | /* | |
676 | * If this is a hot spare not currently in use or level 2 cache | |
677 | * device, add it to the list of names to translate, but don't do | |
678 | * anything else. | |
679 | */ | |
680 | if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
681 | &state) == 0 && | |
682 | (state == POOL_STATE_SPARE || state == POOL_STATE_L2CACHE) && | |
683 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid) == 0) { | |
cae5b340 AX |
684 | if ((ne = zfs_alloc(hdl, sizeof (name_entry_t))) == NULL) { |
685 | nvlist_free(config); | |
34dc7c2f | 686 | return (-1); |
cae5b340 | 687 | } |
34dc7c2f BB |
688 | |
689 | if ((ne->ne_name = zfs_strdup(hdl, path)) == NULL) { | |
690 | free(ne); | |
cae5b340 | 691 | nvlist_free(config); |
34dc7c2f BB |
692 | return (-1); |
693 | } | |
694 | ne->ne_guid = vdev_guid; | |
44867b6d | 695 | ne->ne_order = order; |
ea04106b | 696 | ne->ne_num_labels = num_labels; |
34dc7c2f BB |
697 | ne->ne_next = pl->names; |
698 | pl->names = ne; | |
cae5b340 | 699 | nvlist_free(config); |
34dc7c2f BB |
700 | return (0); |
701 | } | |
702 | ||
703 | /* | |
704 | * If we have a valid config but cannot read any of these fields, then | |
705 | * it means we have a half-initialized label. In vdev_label_init() | |
706 | * we write a label with txg == 0 so that we can identify the device | |
707 | * in case the user refers to the same disk later on. If we fail to | |
708 | * create the pool, we'll be left with a label in this state | |
709 | * which should not be considered part of a valid pool. | |
710 | */ | |
711 | if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
712 | &pool_guid) != 0 || | |
713 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, | |
714 | &vdev_guid) != 0 || | |
715 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_TOP_GUID, | |
716 | &top_guid) != 0 || | |
717 | nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, | |
718 | &txg) != 0 || txg == 0) { | |
719 | nvlist_free(config); | |
720 | return (0); | |
721 | } | |
722 | ||
723 | /* | |
724 | * First, see if we know about this pool. If not, then add it to the | |
725 | * list of known pools. | |
726 | */ | |
727 | for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { | |
728 | if (pe->pe_guid == pool_guid) | |
729 | break; | |
730 | } | |
731 | ||
732 | if (pe == NULL) { | |
733 | if ((pe = zfs_alloc(hdl, sizeof (pool_entry_t))) == NULL) { | |
734 | nvlist_free(config); | |
735 | return (-1); | |
736 | } | |
737 | pe->pe_guid = pool_guid; | |
738 | pe->pe_next = pl->pools; | |
739 | pl->pools = pe; | |
740 | } | |
741 | ||
742 | /* | |
743 | * Second, see if we know about this toplevel vdev. Add it if its | |
744 | * missing. | |
745 | */ | |
746 | for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { | |
747 | if (ve->ve_guid == top_guid) | |
748 | break; | |
749 | } | |
750 | ||
751 | if (ve == NULL) { | |
752 | if ((ve = zfs_alloc(hdl, sizeof (vdev_entry_t))) == NULL) { | |
753 | nvlist_free(config); | |
754 | return (-1); | |
755 | } | |
756 | ve->ve_guid = top_guid; | |
757 | ve->ve_next = pe->pe_vdevs; | |
758 | pe->pe_vdevs = ve; | |
759 | } | |
760 | ||
761 | /* | |
762 | * Third, see if we have a config with a matching transaction group. If | |
763 | * so, then we do nothing. Otherwise, add it to the list of known | |
764 | * configs. | |
765 | */ | |
766 | for (ce = ve->ve_configs; ce != NULL; ce = ce->ce_next) { | |
767 | if (ce->ce_txg == txg) | |
768 | break; | |
769 | } | |
770 | ||
771 | if (ce == NULL) { | |
772 | if ((ce = zfs_alloc(hdl, sizeof (config_entry_t))) == NULL) { | |
773 | nvlist_free(config); | |
774 | return (-1); | |
775 | } | |
776 | ce->ce_txg = txg; | |
777 | ce->ce_config = config; | |
778 | ce->ce_next = ve->ve_configs; | |
779 | ve->ve_configs = ce; | |
780 | } else { | |
781 | nvlist_free(config); | |
782 | } | |
783 | ||
784 | /* | |
785 | * At this point we've successfully added our config to the list of | |
786 | * known configs. The last thing to do is add the vdev guid -> path | |
787 | * mappings so that we can fix up the configuration as necessary before | |
788 | * doing the import. | |
789 | */ | |
790 | if ((ne = zfs_alloc(hdl, sizeof (name_entry_t))) == NULL) | |
791 | return (-1); | |
792 | ||
793 | if ((ne->ne_name = zfs_strdup(hdl, path)) == NULL) { | |
794 | free(ne); | |
795 | return (-1); | |
796 | } | |
797 | ||
798 | ne->ne_guid = vdev_guid; | |
44867b6d | 799 | ne->ne_order = order; |
ea04106b | 800 | ne->ne_num_labels = num_labels; |
34dc7c2f BB |
801 | ne->ne_next = pl->names; |
802 | pl->names = ne; | |
803 | ||
804 | return (0); | |
805 | } | |
806 | ||
807 | /* | |
808 | * Returns true if the named pool matches the given GUID. | |
809 | */ | |
810 | static int | |
811 | pool_active(libzfs_handle_t *hdl, const char *name, uint64_t guid, | |
812 | boolean_t *isactive) | |
813 | { | |
814 | zpool_handle_t *zhp; | |
815 | uint64_t theguid; | |
816 | ||
817 | if (zpool_open_silent(hdl, name, &zhp) != 0) | |
818 | return (-1); | |
819 | ||
820 | if (zhp == NULL) { | |
821 | *isactive = B_FALSE; | |
822 | return (0); | |
823 | } | |
824 | ||
825 | verify(nvlist_lookup_uint64(zhp->zpool_config, ZPOOL_CONFIG_POOL_GUID, | |
826 | &theguid) == 0); | |
827 | ||
828 | zpool_close(zhp); | |
829 | ||
830 | *isactive = (theguid == guid); | |
831 | return (0); | |
832 | } | |
833 | ||
834 | static nvlist_t * | |
835 | refresh_config(libzfs_handle_t *hdl, nvlist_t *config) | |
836 | { | |
837 | nvlist_t *nvl; | |
a08ee875 | 838 | zfs_cmd_t zc = {"\0"}; |
cae5b340 | 839 | int err, dstbuf_size; |
34dc7c2f BB |
840 | |
841 | if (zcmd_write_conf_nvlist(hdl, &zc, config) != 0) | |
842 | return (NULL); | |
843 | ||
cae5b340 AX |
844 | dstbuf_size = MAX(CONFIG_BUF_MINSIZE, zc.zc_nvlist_conf_size * 4); |
845 | ||
846 | if (zcmd_alloc_dst_nvlist(hdl, &zc, dstbuf_size) != 0) { | |
34dc7c2f BB |
847 | zcmd_free_nvlists(&zc); |
848 | return (NULL); | |
849 | } | |
850 | ||
851 | while ((err = ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_TRYIMPORT, | |
852 | &zc)) != 0 && errno == ENOMEM) { | |
853 | if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { | |
854 | zcmd_free_nvlists(&zc); | |
855 | return (NULL); | |
856 | } | |
857 | } | |
858 | ||
859 | if (err) { | |
34dc7c2f BB |
860 | zcmd_free_nvlists(&zc); |
861 | return (NULL); | |
862 | } | |
863 | ||
864 | if (zcmd_read_dst_nvlist(hdl, &zc, &nvl) != 0) { | |
865 | zcmd_free_nvlists(&zc); | |
866 | return (NULL); | |
867 | } | |
868 | ||
869 | zcmd_free_nvlists(&zc); | |
870 | return (nvl); | |
871 | } | |
872 | ||
428870ff BB |
873 | /* |
874 | * Determine if the vdev id is a hole in the namespace. | |
875 | */ | |
876 | boolean_t | |
877 | vdev_is_hole(uint64_t *hole_array, uint_t holes, uint_t id) | |
878 | { | |
d6320ddb BB |
879 | int c; |
880 | ||
881 | for (c = 0; c < holes; c++) { | |
428870ff BB |
882 | |
883 | /* Top-level is a hole */ | |
884 | if (hole_array[c] == id) | |
885 | return (B_TRUE); | |
886 | } | |
887 | return (B_FALSE); | |
888 | } | |
889 | ||
34dc7c2f BB |
890 | /* |
891 | * Convert our list of pools into the definitive set of configurations. We | |
892 | * start by picking the best config for each toplevel vdev. Once that's done, | |
893 | * we assemble the toplevel vdevs into a full config for the pool. We make a | |
894 | * pass to fix up any incorrect paths, and then add it to the main list to | |
895 | * return to the user. | |
896 | */ | |
897 | static nvlist_t * | |
898 | get_configs(libzfs_handle_t *hdl, pool_list_t *pl, boolean_t active_ok) | |
899 | { | |
900 | pool_entry_t *pe; | |
901 | vdev_entry_t *ve; | |
902 | config_entry_t *ce; | |
d4ed6673 | 903 | nvlist_t *ret = NULL, *config = NULL, *tmp = NULL, *nvtop, *nvroot; |
34dc7c2f BB |
904 | nvlist_t **spares, **l2cache; |
905 | uint_t i, nspares, nl2cache; | |
906 | boolean_t config_seen; | |
907 | uint64_t best_txg; | |
3bc7e0fb GW |
908 | char *name, *hostname = NULL; |
909 | uint64_t guid; | |
34dc7c2f BB |
910 | uint_t children = 0; |
911 | nvlist_t **child = NULL; | |
428870ff BB |
912 | uint_t holes; |
913 | uint64_t *hole_array, max_id; | |
34dc7c2f BB |
914 | uint_t c; |
915 | boolean_t isactive; | |
916 | uint64_t hostid; | |
917 | nvlist_t *nvl; | |
428870ff | 918 | boolean_t valid_top_config = B_FALSE; |
34dc7c2f BB |
919 | |
920 | if (nvlist_alloc(&ret, 0, 0) != 0) | |
921 | goto nomem; | |
922 | ||
923 | for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { | |
428870ff | 924 | uint64_t id, max_txg = 0; |
34dc7c2f BB |
925 | |
926 | if (nvlist_alloc(&config, NV_UNIQUE_NAME, 0) != 0) | |
927 | goto nomem; | |
928 | config_seen = B_FALSE; | |
929 | ||
930 | /* | |
931 | * Iterate over all toplevel vdevs. Grab the pool configuration | |
932 | * from the first one we find, and then go through the rest and | |
933 | * add them as necessary to the 'vdevs' member of the config. | |
934 | */ | |
935 | for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { | |
936 | ||
937 | /* | |
938 | * Determine the best configuration for this vdev by | |
939 | * selecting the config with the latest transaction | |
940 | * group. | |
941 | */ | |
942 | best_txg = 0; | |
943 | for (ce = ve->ve_configs; ce != NULL; | |
944 | ce = ce->ce_next) { | |
945 | ||
946 | if (ce->ce_txg > best_txg) { | |
947 | tmp = ce->ce_config; | |
948 | best_txg = ce->ce_txg; | |
949 | } | |
950 | } | |
951 | ||
428870ff BB |
952 | /* |
953 | * We rely on the fact that the max txg for the | |
954 | * pool will contain the most up-to-date information | |
955 | * about the valid top-levels in the vdev namespace. | |
956 | */ | |
957 | if (best_txg > max_txg) { | |
958 | (void) nvlist_remove(config, | |
959 | ZPOOL_CONFIG_VDEV_CHILDREN, | |
960 | DATA_TYPE_UINT64); | |
961 | (void) nvlist_remove(config, | |
962 | ZPOOL_CONFIG_HOLE_ARRAY, | |
963 | DATA_TYPE_UINT64_ARRAY); | |
964 | ||
965 | max_txg = best_txg; | |
966 | hole_array = NULL; | |
967 | holes = 0; | |
968 | max_id = 0; | |
969 | valid_top_config = B_FALSE; | |
970 | ||
971 | if (nvlist_lookup_uint64(tmp, | |
972 | ZPOOL_CONFIG_VDEV_CHILDREN, &max_id) == 0) { | |
973 | verify(nvlist_add_uint64(config, | |
974 | ZPOOL_CONFIG_VDEV_CHILDREN, | |
975 | max_id) == 0); | |
976 | valid_top_config = B_TRUE; | |
977 | } | |
978 | ||
979 | if (nvlist_lookup_uint64_array(tmp, | |
980 | ZPOOL_CONFIG_HOLE_ARRAY, &hole_array, | |
981 | &holes) == 0) { | |
982 | verify(nvlist_add_uint64_array(config, | |
983 | ZPOOL_CONFIG_HOLE_ARRAY, | |
984 | hole_array, holes) == 0); | |
985 | } | |
986 | } | |
987 | ||
34dc7c2f BB |
988 | if (!config_seen) { |
989 | /* | |
990 | * Copy the relevant pieces of data to the pool | |
991 | * configuration: | |
992 | * | |
993 | * version | |
3bc7e0fb GW |
994 | * pool guid |
995 | * name | |
d96eb2b1 | 996 | * comment (if available) |
3bc7e0fb | 997 | * pool state |
34dc7c2f BB |
998 | * hostid (if available) |
999 | * hostname (if available) | |
1000 | */ | |
c06d4368 | 1001 | uint64_t state, version; |
3bc7e0fb GW |
1002 | char *comment = NULL; |
1003 | ||
1004 | version = fnvlist_lookup_uint64(tmp, | |
1005 | ZPOOL_CONFIG_VERSION); | |
1006 | fnvlist_add_uint64(config, | |
1007 | ZPOOL_CONFIG_VERSION, version); | |
1008 | guid = fnvlist_lookup_uint64(tmp, | |
1009 | ZPOOL_CONFIG_POOL_GUID); | |
1010 | fnvlist_add_uint64(config, | |
1011 | ZPOOL_CONFIG_POOL_GUID, guid); | |
1012 | name = fnvlist_lookup_string(tmp, | |
1013 | ZPOOL_CONFIG_POOL_NAME); | |
1014 | fnvlist_add_string(config, | |
1015 | ZPOOL_CONFIG_POOL_NAME, name); | |
34dc7c2f | 1016 | |
d96eb2b1 | 1017 | if (nvlist_lookup_string(tmp, |
3bc7e0fb GW |
1018 | ZPOOL_CONFIG_COMMENT, &comment) == 0) |
1019 | fnvlist_add_string(config, | |
1020 | ZPOOL_CONFIG_COMMENT, comment); | |
d96eb2b1 | 1021 | |
3bc7e0fb GW |
1022 | state = fnvlist_lookup_uint64(tmp, |
1023 | ZPOOL_CONFIG_POOL_STATE); | |
1024 | fnvlist_add_uint64(config, | |
1025 | ZPOOL_CONFIG_POOL_STATE, state); | |
d96eb2b1 | 1026 | |
34dc7c2f BB |
1027 | hostid = 0; |
1028 | if (nvlist_lookup_uint64(tmp, | |
1029 | ZPOOL_CONFIG_HOSTID, &hostid) == 0) { | |
3bc7e0fb GW |
1030 | fnvlist_add_uint64(config, |
1031 | ZPOOL_CONFIG_HOSTID, hostid); | |
1032 | hostname = fnvlist_lookup_string(tmp, | |
1033 | ZPOOL_CONFIG_HOSTNAME); | |
1034 | fnvlist_add_string(config, | |
1035 | ZPOOL_CONFIG_HOSTNAME, hostname); | |
34dc7c2f BB |
1036 | } |
1037 | ||
1038 | config_seen = B_TRUE; | |
1039 | } | |
1040 | ||
1041 | /* | |
1042 | * Add this top-level vdev to the child array. | |
1043 | */ | |
1044 | verify(nvlist_lookup_nvlist(tmp, | |
1045 | ZPOOL_CONFIG_VDEV_TREE, &nvtop) == 0); | |
1046 | verify(nvlist_lookup_uint64(nvtop, ZPOOL_CONFIG_ID, | |
1047 | &id) == 0); | |
428870ff | 1048 | |
34dc7c2f BB |
1049 | if (id >= children) { |
1050 | nvlist_t **newchild; | |
1051 | ||
1052 | newchild = zfs_alloc(hdl, (id + 1) * | |
1053 | sizeof (nvlist_t *)); | |
1054 | if (newchild == NULL) | |
1055 | goto nomem; | |
1056 | ||
1057 | for (c = 0; c < children; c++) | |
1058 | newchild[c] = child[c]; | |
1059 | ||
1060 | free(child); | |
1061 | child = newchild; | |
1062 | children = id + 1; | |
1063 | } | |
1064 | if (nvlist_dup(nvtop, &child[id], 0) != 0) | |
1065 | goto nomem; | |
1066 | ||
1067 | } | |
1068 | ||
428870ff BB |
1069 | /* |
1070 | * If we have information about all the top-levels then | |
1071 | * clean up the nvlist which we've constructed. This | |
1072 | * means removing any extraneous devices that are | |
1073 | * beyond the valid range or adding devices to the end | |
1074 | * of our array which appear to be missing. | |
1075 | */ | |
1076 | if (valid_top_config) { | |
1077 | if (max_id < children) { | |
1078 | for (c = max_id; c < children; c++) | |
1079 | nvlist_free(child[c]); | |
1080 | children = max_id; | |
1081 | } else if (max_id > children) { | |
1082 | nvlist_t **newchild; | |
1083 | ||
1084 | newchild = zfs_alloc(hdl, (max_id) * | |
1085 | sizeof (nvlist_t *)); | |
1086 | if (newchild == NULL) | |
1087 | goto nomem; | |
1088 | ||
1089 | for (c = 0; c < children; c++) | |
1090 | newchild[c] = child[c]; | |
1091 | ||
1092 | free(child); | |
1093 | child = newchild; | |
1094 | children = max_id; | |
1095 | } | |
1096 | } | |
1097 | ||
34dc7c2f BB |
1098 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
1099 | &guid) == 0); | |
1100 | ||
428870ff BB |
1101 | /* |
1102 | * The vdev namespace may contain holes as a result of | |
1103 | * device removal. We must add them back into the vdev | |
1104 | * tree before we process any missing devices. | |
1105 | */ | |
1106 | if (holes > 0) { | |
1107 | ASSERT(valid_top_config); | |
1108 | ||
1109 | for (c = 0; c < children; c++) { | |
1110 | nvlist_t *holey; | |
1111 | ||
1112 | if (child[c] != NULL || | |
1113 | !vdev_is_hole(hole_array, holes, c)) | |
1114 | continue; | |
1115 | ||
1116 | if (nvlist_alloc(&holey, NV_UNIQUE_NAME, | |
1117 | 0) != 0) | |
1118 | goto nomem; | |
1119 | ||
1120 | /* | |
1121 | * Holes in the namespace are treated as | |
1122 | * "hole" top-level vdevs and have a | |
1123 | * special flag set on them. | |
1124 | */ | |
1125 | if (nvlist_add_string(holey, | |
1126 | ZPOOL_CONFIG_TYPE, | |
1127 | VDEV_TYPE_HOLE) != 0 || | |
1128 | nvlist_add_uint64(holey, | |
1129 | ZPOOL_CONFIG_ID, c) != 0 || | |
1130 | nvlist_add_uint64(holey, | |
cae5b340 AX |
1131 | ZPOOL_CONFIG_GUID, 0ULL) != 0) { |
1132 | nvlist_free(holey); | |
428870ff | 1133 | goto nomem; |
cae5b340 | 1134 | } |
428870ff BB |
1135 | child[c] = holey; |
1136 | } | |
1137 | } | |
1138 | ||
34dc7c2f BB |
1139 | /* |
1140 | * Look for any missing top-level vdevs. If this is the case, | |
1141 | * create a faked up 'missing' vdev as a placeholder. We cannot | |
1142 | * simply compress the child array, because the kernel performs | |
1143 | * certain checks to make sure the vdev IDs match their location | |
1144 | * in the configuration. | |
1145 | */ | |
428870ff | 1146 | for (c = 0; c < children; c++) { |
34dc7c2f BB |
1147 | if (child[c] == NULL) { |
1148 | nvlist_t *missing; | |
1149 | if (nvlist_alloc(&missing, NV_UNIQUE_NAME, | |
1150 | 0) != 0) | |
1151 | goto nomem; | |
1152 | if (nvlist_add_string(missing, | |
1153 | ZPOOL_CONFIG_TYPE, | |
1154 | VDEV_TYPE_MISSING) != 0 || | |
1155 | nvlist_add_uint64(missing, | |
1156 | ZPOOL_CONFIG_ID, c) != 0 || | |
1157 | nvlist_add_uint64(missing, | |
1158 | ZPOOL_CONFIG_GUID, 0ULL) != 0) { | |
1159 | nvlist_free(missing); | |
1160 | goto nomem; | |
1161 | } | |
1162 | child[c] = missing; | |
1163 | } | |
428870ff | 1164 | } |
34dc7c2f BB |
1165 | |
1166 | /* | |
1167 | * Put all of this pool's top-level vdevs into a root vdev. | |
1168 | */ | |
1169 | if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) | |
1170 | goto nomem; | |
1171 | if (nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, | |
1172 | VDEV_TYPE_ROOT) != 0 || | |
1173 | nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) != 0 || | |
1174 | nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, guid) != 0 || | |
1175 | nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, | |
1176 | child, children) != 0) { | |
1177 | nvlist_free(nvroot); | |
1178 | goto nomem; | |
1179 | } | |
1180 | ||
1181 | for (c = 0; c < children; c++) | |
1182 | nvlist_free(child[c]); | |
1183 | free(child); | |
1184 | children = 0; | |
1185 | child = NULL; | |
1186 | ||
1187 | /* | |
1188 | * Go through and fix up any paths and/or devids based on our | |
1189 | * known list of vdev GUID -> path mappings. | |
1190 | */ | |
1191 | if (fix_paths(nvroot, pl->names) != 0) { | |
1192 | nvlist_free(nvroot); | |
1193 | goto nomem; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * Add the root vdev to this pool's configuration. | |
1198 | */ | |
1199 | if (nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
1200 | nvroot) != 0) { | |
1201 | nvlist_free(nvroot); | |
1202 | goto nomem; | |
1203 | } | |
1204 | nvlist_free(nvroot); | |
1205 | ||
1206 | /* | |
1207 | * zdb uses this path to report on active pools that were | |
1208 | * imported or created using -R. | |
1209 | */ | |
1210 | if (active_ok) | |
1211 | goto add_pool; | |
1212 | ||
1213 | /* | |
1214 | * Determine if this pool is currently active, in which case we | |
1215 | * can't actually import it. | |
1216 | */ | |
1217 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
1218 | &name) == 0); | |
1219 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
1220 | &guid) == 0); | |
1221 | ||
1222 | if (pool_active(hdl, name, guid, &isactive) != 0) | |
1223 | goto error; | |
1224 | ||
1225 | if (isactive) { | |
1226 | nvlist_free(config); | |
1227 | config = NULL; | |
1228 | continue; | |
1229 | } | |
1230 | ||
428870ff BB |
1231 | if ((nvl = refresh_config(hdl, config)) == NULL) { |
1232 | nvlist_free(config); | |
1233 | config = NULL; | |
1234 | continue; | |
1235 | } | |
34dc7c2f BB |
1236 | |
1237 | nvlist_free(config); | |
1238 | config = nvl; | |
1239 | ||
1240 | /* | |
1241 | * Go through and update the paths for spares, now that we have | |
1242 | * them. | |
1243 | */ | |
1244 | verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
1245 | &nvroot) == 0); | |
1246 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
1247 | &spares, &nspares) == 0) { | |
1248 | for (i = 0; i < nspares; i++) { | |
1249 | if (fix_paths(spares[i], pl->names) != 0) | |
1250 | goto nomem; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Update the paths for l2cache devices. | |
1256 | */ | |
1257 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, | |
1258 | &l2cache, &nl2cache) == 0) { | |
1259 | for (i = 0; i < nl2cache; i++) { | |
1260 | if (fix_paths(l2cache[i], pl->names) != 0) | |
1261 | goto nomem; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Restore the original information read from the actual label. | |
1267 | */ | |
1268 | (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTID, | |
1269 | DATA_TYPE_UINT64); | |
1270 | (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTNAME, | |
1271 | DATA_TYPE_STRING); | |
1272 | if (hostid != 0) { | |
1273 | verify(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, | |
1274 | hostid) == 0); | |
1275 | verify(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, | |
1276 | hostname) == 0); | |
1277 | } | |
1278 | ||
1279 | add_pool: | |
1280 | /* | |
1281 | * Add this pool to the list of configs. | |
1282 | */ | |
1283 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
1284 | &name) == 0); | |
1285 | if (nvlist_add_nvlist(ret, name, config) != 0) | |
1286 | goto nomem; | |
1287 | ||
1288 | nvlist_free(config); | |
1289 | config = NULL; | |
1290 | } | |
1291 | ||
1292 | return (ret); | |
1293 | ||
1294 | nomem: | |
1295 | (void) no_memory(hdl); | |
1296 | error: | |
1297 | nvlist_free(config); | |
1298 | nvlist_free(ret); | |
1299 | for (c = 0; c < children; c++) | |
1300 | nvlist_free(child[c]); | |
1301 | free(child); | |
1302 | ||
1303 | return (NULL); | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Return the offset of the given label. | |
1308 | */ | |
1309 | static uint64_t | |
1310 | label_offset(uint64_t size, int l) | |
1311 | { | |
1312 | ASSERT(P2PHASE_TYPED(size, sizeof (vdev_label_t), uint64_t) == 0); | |
1313 | return (l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ? | |
1314 | 0 : size - VDEV_LABELS * sizeof (vdev_label_t))); | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * Given a file descriptor, read the label information and return an nvlist | |
ea04106b AX |
1319 | * describing the configuration, if there is one. The number of valid |
1320 | * labels found will be returned in num_labels when non-NULL. | |
34dc7c2f BB |
1321 | */ |
1322 | int | |
ea04106b | 1323 | zpool_read_label(int fd, nvlist_t **config, int *num_labels) |
34dc7c2f BB |
1324 | { |
1325 | struct stat64 statbuf; | |
ea04106b | 1326 | int l, count = 0; |
34dc7c2f | 1327 | vdev_label_t *label; |
ea04106b AX |
1328 | nvlist_t *expected_config = NULL; |
1329 | uint64_t expected_guid = 0, size; | |
cae5b340 | 1330 | int error; |
34dc7c2f BB |
1331 | |
1332 | *config = NULL; | |
1333 | ||
c06d4368 | 1334 | if (fstat64_blk(fd, &statbuf) == -1) |
34dc7c2f BB |
1335 | return (0); |
1336 | size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); | |
1337 | ||
cae5b340 AX |
1338 | error = posix_memalign((void **)&label, PAGESIZE, sizeof (*label)); |
1339 | if (error) | |
34dc7c2f BB |
1340 | return (-1); |
1341 | ||
1342 | for (l = 0; l < VDEV_LABELS; l++) { | |
ea04106b AX |
1343 | uint64_t state, guid, txg; |
1344 | ||
b128c09f | 1345 | if (pread64(fd, label, sizeof (vdev_label_t), |
34dc7c2f BB |
1346 | label_offset(size, l)) != sizeof (vdev_label_t)) |
1347 | continue; | |
1348 | ||
1349 | if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist, | |
1350 | sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) | |
1351 | continue; | |
1352 | ||
ea04106b AX |
1353 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, |
1354 | &guid) != 0 || guid == 0) { | |
1355 | nvlist_free(*config); | |
1356 | continue; | |
1357 | } | |
1358 | ||
34dc7c2f BB |
1359 | if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, |
1360 | &state) != 0 || state > POOL_STATE_L2CACHE) { | |
1361 | nvlist_free(*config); | |
1362 | continue; | |
1363 | } | |
1364 | ||
1365 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
1366 | (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, | |
1367 | &txg) != 0 || txg == 0)) { | |
1368 | nvlist_free(*config); | |
1369 | continue; | |
1370 | } | |
1371 | ||
ea04106b AX |
1372 | if (expected_guid) { |
1373 | if (expected_guid == guid) | |
1374 | count++; | |
1375 | ||
1376 | nvlist_free(*config); | |
1377 | } else { | |
1378 | expected_config = *config; | |
1379 | expected_guid = guid; | |
1380 | count++; | |
1381 | } | |
34dc7c2f BB |
1382 | } |
1383 | ||
ea04106b AX |
1384 | if (num_labels != NULL) |
1385 | *num_labels = count; | |
1386 | ||
34dc7c2f | 1387 | free(label); |
ea04106b AX |
1388 | *config = expected_config; |
1389 | ||
34dc7c2f BB |
1390 | return (0); |
1391 | } | |
1392 | ||
cae5b340 AX |
1393 | typedef struct rdsk_node { |
1394 | char *rn_name; /* Full path to device */ | |
1395 | int rn_order; /* Preferred order (low to high) */ | |
1396 | int rn_num_labels; /* Number of valid labels */ | |
1397 | uint64_t rn_vdev_guid; /* Expected vdev guid when set */ | |
1398 | libzfs_handle_t *rn_hdl; | |
1399 | nvlist_t *rn_config; /* Label config */ | |
1400 | avl_tree_t *rn_avl; | |
1401 | avl_node_t rn_node; | |
1402 | kmutex_t *rn_lock; | |
1403 | boolean_t rn_labelpaths; | |
1404 | } rdsk_node_t; | |
1405 | ||
1406 | /* | |
1407 | * Sorted by vdev guid and full path to allow for multiple entries with | |
1408 | * the same full path name. This is required because it's possible to | |
1409 | * have multiple block devices with labels that refer to the same | |
1410 | * ZPOOL_CONFIG_PATH yet have different vdev guids. In this case both | |
1411 | * entries need to be added to the cache. Scenarios where this can occur | |
1412 | * include overwritten pool labels, devices which are visible from multiple | |
1413 | * hosts and multipath devices. | |
1414 | */ | |
1415 | static int | |
1416 | slice_cache_compare(const void *arg1, const void *arg2) | |
1417 | { | |
1418 | const char *nm1 = ((rdsk_node_t *)arg1)->rn_name; | |
1419 | const char *nm2 = ((rdsk_node_t *)arg2)->rn_name; | |
1420 | uint64_t guid1 = ((rdsk_node_t *)arg1)->rn_vdev_guid; | |
1421 | uint64_t guid2 = ((rdsk_node_t *)arg2)->rn_vdev_guid; | |
1422 | int rv; | |
1423 | ||
1424 | rv = AVL_CMP(guid1, guid2); | |
1425 | if (rv) | |
1426 | return (rv); | |
1427 | ||
1428 | return (AVL_ISIGN(strcmp(nm1, nm2))); | |
1429 | } | |
1430 | ||
1431 | static boolean_t | |
1432 | is_watchdog_dev(char *dev) | |
1433 | { | |
1434 | /* For 'watchdog' dev */ | |
1435 | if (strcmp(dev, "watchdog") == 0) | |
1436 | return (B_TRUE); | |
1437 | ||
1438 | /* For 'watchdog<digit><whatever> */ | |
1439 | if (strstr(dev, "watchdog") == dev && isdigit(dev[8])) | |
1440 | return (B_TRUE); | |
1441 | ||
1442 | return (B_FALSE); | |
1443 | } | |
1444 | ||
1445 | static int | |
1446 | label_paths_impl(libzfs_handle_t *hdl, nvlist_t *nvroot, uint64_t pool_guid, | |
1447 | uint64_t vdev_guid, char **path, char **devid) | |
1448 | { | |
1449 | nvlist_t **child; | |
1450 | uint_t c, children; | |
1451 | uint64_t guid; | |
1452 | char *val; | |
1453 | int error; | |
1454 | ||
1455 | if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, | |
1456 | &child, &children) == 0) { | |
1457 | for (c = 0; c < children; c++) { | |
1458 | error = label_paths_impl(hdl, child[c], | |
1459 | pool_guid, vdev_guid, path, devid); | |
1460 | if (error) | |
1461 | return (error); | |
1462 | } | |
1463 | return (0); | |
1464 | } | |
1465 | ||
1466 | if (nvroot == NULL) | |
1467 | return (0); | |
1468 | ||
1469 | error = nvlist_lookup_uint64(nvroot, ZPOOL_CONFIG_GUID, &guid); | |
1470 | if ((error != 0) || (guid != vdev_guid)) | |
1471 | return (0); | |
1472 | ||
1473 | error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_PATH, &val); | |
1474 | if (error == 0) | |
1475 | *path = val; | |
1476 | ||
1477 | error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_DEVID, &val); | |
1478 | if (error == 0) | |
1479 | *devid = val; | |
1480 | ||
1481 | return (0); | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * Given a disk label fetch the ZPOOL_CONFIG_PATH and ZPOOL_CONFIG_DEVID | |
1486 | * and store these strings as config_path and devid_path respectively. | |
1487 | * The returned pointers are only valid as long as label remains valid. | |
1488 | */ | |
1489 | static int | |
1490 | label_paths(libzfs_handle_t *hdl, nvlist_t *label, char **path, char **devid) | |
1491 | { | |
1492 | nvlist_t *nvroot; | |
1493 | uint64_t pool_guid; | |
1494 | uint64_t vdev_guid; | |
1495 | ||
1496 | *path = NULL; | |
1497 | *devid = NULL; | |
1498 | ||
1499 | if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || | |
1500 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &pool_guid) || | |
1501 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &vdev_guid)) | |
1502 | return (ENOENT); | |
1503 | ||
1504 | return (label_paths_impl(hdl, nvroot, pool_guid, vdev_guid, path, | |
1505 | devid)); | |
1506 | } | |
1507 | ||
1508 | static void | |
1509 | zpool_open_func(void *arg) | |
1510 | { | |
1511 | rdsk_node_t *rn = arg; | |
1512 | libzfs_handle_t *hdl = rn->rn_hdl; | |
1513 | struct stat64 statbuf; | |
1514 | nvlist_t *config; | |
1515 | char *bname, *dupname; | |
1516 | uint64_t vdev_guid = 0; | |
1517 | int error; | |
1518 | int num_labels; | |
1519 | int fd; | |
1520 | ||
1521 | /* | |
1522 | * Skip devices with well known prefixes there can be side effects | |
1523 | * when opening devices which need to be avoided. | |
1524 | * | |
1525 | * hpet - High Precision Event Timer | |
1526 | * watchdog - Watchdog must be closed in a special way. | |
1527 | */ | |
1528 | dupname = zfs_strdup(hdl, rn->rn_name); | |
1529 | bname = basename(dupname); | |
1530 | error = ((strcmp(bname, "hpet") == 0) || is_watchdog_dev(bname)); | |
1531 | free(dupname); | |
1532 | if (error) | |
1533 | return; | |
1534 | ||
1535 | /* | |
1536 | * Ignore failed stats. We only want regular files and block devices. | |
1537 | */ | |
1538 | if (stat64(rn->rn_name, &statbuf) != 0 || | |
1539 | (!S_ISREG(statbuf.st_mode) && !S_ISBLK(statbuf.st_mode))) | |
1540 | return; | |
1541 | ||
1542 | /* | |
1543 | * Preferentially open using O_DIRECT to bypass the block device | |
1544 | * cache which may be stale for multipath devices. An EINVAL errno | |
1545 | * indicates O_DIRECT is unsupported so fallback to just O_RDONLY. | |
1546 | */ | |
1547 | fd = open(rn->rn_name, O_RDONLY | O_DIRECT); | |
1548 | if ((fd < 0) && (errno == EINVAL)) | |
1549 | fd = open(rn->rn_name, O_RDONLY); | |
1550 | ||
1551 | if (fd < 0) | |
1552 | return; | |
1553 | ||
1554 | /* | |
1555 | * This file is too small to hold a zpool | |
1556 | */ | |
1557 | if (S_ISREG(statbuf.st_mode) && statbuf.st_size < SPA_MINDEVSIZE) { | |
1558 | (void) close(fd); | |
1559 | return; | |
1560 | } | |
1561 | ||
1562 | error = zpool_read_label(fd, &config, &num_labels); | |
1563 | if (error != 0) { | |
1564 | (void) close(fd); | |
1565 | return; | |
1566 | } | |
1567 | ||
1568 | if (num_labels == 0) { | |
1569 | (void) close(fd); | |
1570 | nvlist_free(config); | |
1571 | return; | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * Check that the vdev is for the expected guid. Additional entries | |
1576 | * are speculatively added based on the paths stored in the labels. | |
1577 | * Entries with valid paths but incorrect guids must be removed. | |
1578 | */ | |
1579 | error = nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid); | |
1580 | if (error || (rn->rn_vdev_guid && rn->rn_vdev_guid != vdev_guid)) { | |
1581 | (void) close(fd); | |
1582 | nvlist_free(config); | |
1583 | return; | |
1584 | } | |
1585 | ||
1586 | (void) close(fd); | |
1587 | ||
1588 | rn->rn_config = config; | |
1589 | rn->rn_num_labels = num_labels; | |
1590 | ||
1591 | /* | |
1592 | * Add additional entries for paths described by this label. | |
1593 | */ | |
1594 | if (rn->rn_labelpaths) { | |
1595 | char *path = NULL; | |
1596 | char *devid = NULL; | |
1597 | rdsk_node_t *slice; | |
1598 | avl_index_t where; | |
1599 | int error; | |
1600 | ||
1601 | if (label_paths(rn->rn_hdl, rn->rn_config, &path, &devid)) | |
1602 | return; | |
1603 | ||
1604 | /* | |
1605 | * Allow devlinks to stabilize so all paths are available. | |
1606 | */ | |
1607 | zpool_label_disk_wait(rn->rn_name, DISK_LABEL_WAIT); | |
1608 | ||
1609 | if (path != NULL) { | |
1610 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1611 | slice->rn_name = zfs_strdup(hdl, path); | |
1612 | slice->rn_vdev_guid = vdev_guid; | |
1613 | slice->rn_avl = rn->rn_avl; | |
1614 | slice->rn_hdl = hdl; | |
1615 | slice->rn_order = IMPORT_ORDER_PREFERRED_1; | |
1616 | slice->rn_labelpaths = B_FALSE; | |
1617 | mutex_enter(rn->rn_lock); | |
1618 | if (avl_find(rn->rn_avl, slice, &where)) { | |
1619 | mutex_exit(rn->rn_lock); | |
1620 | free(slice->rn_name); | |
1621 | free(slice); | |
1622 | } else { | |
1623 | avl_insert(rn->rn_avl, slice, where); | |
1624 | mutex_exit(rn->rn_lock); | |
1625 | zpool_open_func(slice); | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | if (devid != NULL) { | |
1630 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1631 | error = asprintf(&slice->rn_name, "%s%s", | |
1632 | DEV_BYID_PATH, devid); | |
1633 | if (error == -1) { | |
1634 | free(slice); | |
1635 | return; | |
1636 | } | |
1637 | ||
1638 | slice->rn_vdev_guid = vdev_guid; | |
1639 | slice->rn_avl = rn->rn_avl; | |
1640 | slice->rn_hdl = hdl; | |
1641 | slice->rn_order = IMPORT_ORDER_PREFERRED_2; | |
1642 | slice->rn_labelpaths = B_FALSE; | |
1643 | mutex_enter(rn->rn_lock); | |
1644 | if (avl_find(rn->rn_avl, slice, &where)) { | |
1645 | mutex_exit(rn->rn_lock); | |
1646 | free(slice->rn_name); | |
1647 | free(slice); | |
1648 | } else { | |
1649 | avl_insert(rn->rn_avl, slice, where); | |
1650 | mutex_exit(rn->rn_lock); | |
1651 | zpool_open_func(slice); | |
1652 | } | |
1653 | } | |
1654 | } | |
1655 | } | |
1656 | ||
c06d4368 AX |
1657 | /* |
1658 | * Given a file descriptor, clear (zero) the label information. This function | |
1659 | * is used in the appliance stack as part of the ZFS sysevent module and | |
1660 | * to implement the "zpool labelclear" command. | |
1661 | */ | |
1662 | int | |
1663 | zpool_clear_label(int fd) | |
1664 | { | |
1665 | struct stat64 statbuf; | |
1666 | int l; | |
1667 | vdev_label_t *label; | |
1668 | uint64_t size; | |
1669 | ||
1670 | if (fstat64_blk(fd, &statbuf) == -1) | |
1671 | return (0); | |
1672 | size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); | |
1673 | ||
1674 | if ((label = calloc(sizeof (vdev_label_t), 1)) == NULL) | |
1675 | return (-1); | |
1676 | ||
1677 | for (l = 0; l < VDEV_LABELS; l++) { | |
1678 | if (pwrite64(fd, label, sizeof (vdev_label_t), | |
ea04106b AX |
1679 | label_offset(size, l)) != sizeof (vdev_label_t)) { |
1680 | free(label); | |
c06d4368 | 1681 | return (-1); |
ea04106b | 1682 | } |
c06d4368 AX |
1683 | } |
1684 | ||
1685 | free(label); | |
1686 | return (0); | |
1687 | } | |
1688 | ||
d603ed6c | 1689 | /* |
cae5b340 | 1690 | * Scan a list of directories for zfs devices. |
d603ed6c | 1691 | */ |
428870ff | 1692 | static int |
cae5b340 AX |
1693 | zpool_find_import_scan(libzfs_handle_t *hdl, kmutex_t *lock, |
1694 | avl_tree_t **slice_cache, char **dir, int dirs) | |
428870ff | 1695 | { |
cae5b340 AX |
1696 | avl_tree_t *cache; |
1697 | rdsk_node_t *slice; | |
1698 | void *cookie; | |
1699 | int i, error; | |
1700 | ||
1701 | *slice_cache = NULL; | |
1702 | cache = zfs_alloc(hdl, sizeof (avl_tree_t)); | |
1703 | avl_create(cache, slice_cache_compare, sizeof (rdsk_node_t), | |
1704 | offsetof(rdsk_node_t, rn_node)); | |
1705 | ||
1706 | for (i = 0; i < dirs; i++) { | |
1707 | char path[MAXPATHLEN]; | |
1708 | struct dirent64 *dp; | |
1709 | DIR *dirp; | |
1710 | ||
1711 | if (realpath(dir[i], path) == NULL) { | |
1712 | error = errno; | |
1713 | if (error == ENOENT) | |
1714 | continue; | |
1715 | ||
1716 | zfs_error_aux(hdl, strerror(error)); | |
1717 | (void) zfs_error_fmt(hdl, EZFS_BADPATH, dgettext( | |
1718 | TEXT_DOMAIN, "cannot resolve path '%s'"), dir[i]); | |
1719 | goto error; | |
1720 | } | |
1721 | ||
1722 | dirp = opendir(path); | |
1723 | if (dirp == NULL) { | |
1724 | error = errno; | |
1725 | zfs_error_aux(hdl, strerror(error)); | |
1726 | (void) zfs_error_fmt(hdl, EZFS_BADPATH, | |
1727 | dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); | |
1728 | goto error; | |
1729 | } | |
1730 | ||
1731 | while ((dp = readdir64(dirp)) != NULL) { | |
1732 | const char *name = dp->d_name; | |
1733 | if (name[0] == '.' && | |
1734 | (name[1] == 0 || (name[1] == '.' && name[2] == 0))) | |
1735 | continue; | |
1736 | ||
1737 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1738 | error = asprintf(&slice->rn_name, "%s/%s", path, name); | |
1739 | if (error == -1) { | |
1740 | free(slice); | |
1741 | continue; | |
1742 | } | |
1743 | slice->rn_vdev_guid = 0; | |
1744 | slice->rn_lock = lock; | |
1745 | slice->rn_avl = cache; | |
1746 | slice->rn_hdl = hdl; | |
1747 | slice->rn_order = i + IMPORT_ORDER_SCAN_OFFSET; | |
1748 | slice->rn_labelpaths = B_FALSE; | |
1749 | mutex_enter(lock); | |
1750 | avl_add(cache, slice); | |
1751 | mutex_exit(lock); | |
1752 | } | |
1753 | ||
1754 | (void) closedir(dirp); | |
1755 | } | |
1756 | ||
1757 | *slice_cache = cache; | |
1758 | return (0); | |
1759 | ||
1760 | error: | |
1761 | cookie = NULL; | |
1762 | while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { | |
1763 | free(slice->rn_name); | |
1764 | free(slice); | |
1765 | } | |
1766 | free(cache); | |
1767 | ||
1768 | return (error); | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * Use libblkid to quickly enumerate all known zfs devices. | |
1773 | */ | |
1774 | static int | |
1775 | zpool_find_import_blkid(libzfs_handle_t *hdl, kmutex_t *lock, | |
1776 | avl_tree_t **slice_cache) | |
1777 | { | |
1778 | rdsk_node_t *slice; | |
d603ed6c BB |
1779 | blkid_cache cache; |
1780 | blkid_dev_iterate iter; | |
1781 | blkid_dev dev; | |
cae5b340 AX |
1782 | avl_index_t where; |
1783 | int error; | |
428870ff | 1784 | |
cae5b340 | 1785 | *slice_cache = NULL; |
428870ff | 1786 | |
cae5b340 AX |
1787 | error = blkid_get_cache(&cache, NULL); |
1788 | if (error != 0) | |
1789 | return (error); | |
1790 | ||
1791 | error = blkid_probe_all_new(cache); | |
1792 | if (error != 0) { | |
1793 | blkid_put_cache(cache); | |
1794 | return (error); | |
428870ff | 1795 | } |
428870ff | 1796 | |
d603ed6c BB |
1797 | iter = blkid_dev_iterate_begin(cache); |
1798 | if (iter == NULL) { | |
cae5b340 AX |
1799 | blkid_put_cache(cache); |
1800 | return (EINVAL); | |
d603ed6c | 1801 | } |
428870ff | 1802 | |
cae5b340 AX |
1803 | error = blkid_dev_set_search(iter, "TYPE", "zfs_member"); |
1804 | if (error != 0) { | |
1805 | blkid_dev_iterate_end(iter); | |
1806 | blkid_put_cache(cache); | |
1807 | return (error); | |
428870ff | 1808 | } |
428870ff | 1809 | |
cae5b340 AX |
1810 | *slice_cache = zfs_alloc(hdl, sizeof (avl_tree_t)); |
1811 | avl_create(*slice_cache, slice_cache_compare, sizeof (rdsk_node_t), | |
1812 | offsetof(rdsk_node_t, rn_node)); | |
428870ff | 1813 | |
cae5b340 AX |
1814 | while (blkid_dev_next(iter, &dev) == 0) { |
1815 | slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); | |
1816 | slice->rn_name = zfs_strdup(hdl, blkid_dev_devname(dev)); | |
1817 | slice->rn_vdev_guid = 0; | |
1818 | slice->rn_lock = lock; | |
1819 | slice->rn_avl = *slice_cache; | |
1820 | slice->rn_hdl = hdl; | |
1821 | slice->rn_labelpaths = B_TRUE; | |
1822 | ||
1823 | error = zfs_path_order(slice->rn_name, &slice->rn_order); | |
1824 | if (error == 0) | |
1825 | slice->rn_order += IMPORT_ORDER_SCAN_OFFSET; | |
1826 | else | |
1827 | slice->rn_order = IMPORT_ORDER_DEFAULT; | |
428870ff | 1828 | |
cae5b340 AX |
1829 | mutex_enter(lock); |
1830 | if (avl_find(*slice_cache, slice, &where)) { | |
1831 | free(slice->rn_name); | |
1832 | free(slice); | |
1833 | } else { | |
1834 | avl_insert(*slice_cache, slice, where); | |
1835 | } | |
1836 | mutex_exit(lock); | |
428870ff BB |
1837 | } |
1838 | ||
d603ed6c | 1839 | blkid_dev_iterate_end(iter); |
d603ed6c | 1840 | blkid_put_cache(cache); |
cae5b340 AX |
1841 | |
1842 | return (0); | |
428870ff BB |
1843 | } |
1844 | ||
eac47204 | 1845 | char * |
44867b6d BB |
1846 | zpool_default_import_path[DEFAULT_IMPORT_PATH_SIZE] = { |
1847 | "/dev/disk/by-vdev", /* Custom rules, use first if they exist */ | |
44867b6d | 1848 | "/dev/mapper", /* Use multipath devices before components */ |
cae5b340 AX |
1849 | "/dev/disk/by-partlabel", /* Single unique entry set by user */ |
1850 | "/dev/disk/by-partuuid", /* Generated partition uuid */ | |
1851 | "/dev/disk/by-label", /* Custom persistent labels */ | |
44867b6d BB |
1852 | "/dev/disk/by-uuid", /* Single unique entry and persistent */ |
1853 | "/dev/disk/by-id", /* May be multiple entries and persistent */ | |
1854 | "/dev/disk/by-path", /* Encodes physical location and persistent */ | |
44867b6d BB |
1855 | "/dev" /* UNSAFE device names will change */ |
1856 | }; | |
1857 | ||
34dc7c2f BB |
1858 | /* |
1859 | * Given a list of directories to search, find all pools stored on disk. This | |
1860 | * includes partial pools which are not available to import. If no args are | |
1861 | * given (argc is 0), then the default directory (/dev/dsk) is searched. | |
b128c09f BB |
1862 | * poolname or guid (but not both) are provided by the caller when trying |
1863 | * to import a specific pool. | |
34dc7c2f | 1864 | */ |
b128c09f | 1865 | static nvlist_t * |
428870ff | 1866 | zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg) |
34dc7c2f | 1867 | { |
cae5b340 | 1868 | nvlist_t *ret = NULL; |
34dc7c2f BB |
1869 | pool_list_t pools = { 0 }; |
1870 | pool_entry_t *pe, *penext; | |
1871 | vdev_entry_t *ve, *venext; | |
1872 | config_entry_t *ce, *cenext; | |
1873 | name_entry_t *ne, *nenext; | |
cae5b340 AX |
1874 | kmutex_t lock; |
1875 | avl_tree_t *cache; | |
1876 | rdsk_node_t *slice; | |
1877 | void *cookie; | |
1878 | taskq_t *t; | |
d603ed6c BB |
1879 | |
1880 | verify(iarg->poolname == NULL || iarg->guid == 0); | |
cae5b340 | 1881 | mutex_init(&lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 1882 | |
cae5b340 AX |
1883 | /* |
1884 | * Locate pool member vdevs using libblkid or by directory scanning. | |
1885 | * On success a newly allocated AVL tree which is populated with an | |
1886 | * entry for each discovered vdev will be returned as the cache. | |
1887 | * It's the callers responsibility to consume and destroy this tree. | |
1888 | */ | |
1889 | if (iarg->scan || iarg->paths != 0) { | |
1890 | int dirs = iarg->paths; | |
1891 | char **dir = iarg->path; | |
d603ed6c | 1892 | |
cae5b340 AX |
1893 | if (dirs == 0) { |
1894 | dir = zpool_default_import_path; | |
1895 | dirs = DEFAULT_IMPORT_PATH_SIZE; | |
1896 | } | |
44867b6d | 1897 | |
cae5b340 AX |
1898 | if (zpool_find_import_scan(hdl, &lock, &cache, dir, dirs) != 0) |
1899 | return (NULL); | |
1900 | } else { | |
1901 | if (zpool_find_import_blkid(hdl, &lock, &cache) != 0) | |
1902 | return (NULL); | |
34dc7c2f BB |
1903 | } |
1904 | ||
1905 | /* | |
cae5b340 AX |
1906 | * Create a thread pool to parallelize the process of reading and |
1907 | * validating labels, a large number of threads can be used due to | |
1908 | * minimal contention. | |
34dc7c2f | 1909 | */ |
cae5b340 AX |
1910 | t = taskq_create("z_import", 2 * boot_ncpus, defclsyspri, |
1911 | 2 * boot_ncpus, INT_MAX, TASKQ_PREPOPULATE); | |
34dc7c2f | 1912 | |
cae5b340 AX |
1913 | for (slice = avl_first(cache); slice; |
1914 | (slice = avl_walk(cache, slice, AVL_AFTER))) | |
1915 | (void) taskq_dispatch(t, zpool_open_func, slice, TQ_SLEEP); | |
34dc7c2f | 1916 | |
cae5b340 AX |
1917 | taskq_wait(t); |
1918 | taskq_destroy(t); | |
34dc7c2f | 1919 | |
cae5b340 AX |
1920 | /* |
1921 | * Process the cache filtering out any entries which are not | |
1922 | * for the specificed pool then adding matching label configs. | |
1923 | */ | |
1924 | cookie = NULL; | |
1925 | while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { | |
1926 | if (slice->rn_config != NULL) { | |
1927 | nvlist_t *config = slice->rn_config; | |
1928 | boolean_t matched = B_TRUE; | |
1929 | boolean_t aux = B_FALSE; | |
1930 | int fd; | |
d603ed6c BB |
1931 | |
1932 | /* | |
cae5b340 AX |
1933 | * Check if it's a spare or l2cache device. If it is, |
1934 | * we need to skip the name and guid check since they | |
1935 | * don't exist on aux device label. | |
d603ed6c | 1936 | */ |
cae5b340 AX |
1937 | if (iarg->poolname != NULL || iarg->guid != 0) { |
1938 | uint64_t state; | |
1939 | aux = nvlist_lookup_uint64(config, | |
1940 | ZPOOL_CONFIG_POOL_STATE, &state) == 0 && | |
1941 | (state == POOL_STATE_SPARE || | |
1942 | state == POOL_STATE_L2CACHE); | |
d603ed6c BB |
1943 | } |
1944 | ||
cae5b340 | 1945 | if (iarg->poolname != NULL && !aux) { |
30b937ee | 1946 | char *pname; |
b128c09f | 1947 | |
cae5b340 AX |
1948 | matched = nvlist_lookup_string(config, |
1949 | ZPOOL_CONFIG_POOL_NAME, &pname) == 0 && | |
1950 | strcmp(iarg->poolname, pname) == 0; | |
1951 | } else if (iarg->guid != 0 && !aux) { | |
1952 | uint64_t this_guid; | |
1953 | ||
1954 | matched = nvlist_lookup_uint64(config, | |
1955 | ZPOOL_CONFIG_POOL_GUID, &this_guid) == 0 && | |
1956 | iarg->guid == this_guid; | |
1957 | } | |
1958 | if (!matched) { | |
1959 | nvlist_free(config); | |
1960 | } else { | |
22929307 | 1961 | /* |
cae5b340 AX |
1962 | * Verify all remaining entries can be opened |
1963 | * exclusively. This will prune all underlying | |
1964 | * multipath devices which otherwise could | |
1965 | * result in the vdev appearing as UNAVAIL. | |
1966 | * | |
1967 | * Under zdb, this step isn't required and | |
1968 | * would prevent a zdb -e of active pools with | |
1969 | * no cachefile. | |
22929307 | 1970 | */ |
cae5b340 AX |
1971 | fd = open(slice->rn_name, O_RDONLY | O_EXCL); |
1972 | if (fd >= 0 || iarg->can_be_active) { | |
1973 | if (fd >= 0) | |
1974 | close(fd); | |
1975 | add_config(hdl, &pools, | |
1976 | slice->rn_name, slice->rn_order, | |
1977 | slice->rn_num_labels, config); | |
1978 | } else { | |
b128c09f | 1979 | nvlist_free(config); |
b128c09f | 1980 | } |
34dc7c2f BB |
1981 | } |
1982 | } | |
cae5b340 AX |
1983 | free(slice->rn_name); |
1984 | free(slice); | |
34dc7c2f | 1985 | } |
cae5b340 AX |
1986 | avl_destroy(cache); |
1987 | free(cache); | |
1988 | mutex_destroy(&lock); | |
34dc7c2f | 1989 | |
428870ff | 1990 | ret = get_configs(hdl, &pools, iarg->can_be_active); |
34dc7c2f | 1991 | |
34dc7c2f BB |
1992 | for (pe = pools.pools; pe != NULL; pe = penext) { |
1993 | penext = pe->pe_next; | |
1994 | for (ve = pe->pe_vdevs; ve != NULL; ve = venext) { | |
1995 | venext = ve->ve_next; | |
1996 | for (ce = ve->ve_configs; ce != NULL; ce = cenext) { | |
1997 | cenext = ce->ce_next; | |
cae5b340 | 1998 | nvlist_free(ce->ce_config); |
34dc7c2f BB |
1999 | free(ce); |
2000 | } | |
2001 | free(ve); | |
2002 | } | |
2003 | free(pe); | |
2004 | } | |
2005 | ||
2006 | for (ne = pools.names; ne != NULL; ne = nenext) { | |
2007 | nenext = ne->ne_next; | |
cae5b340 | 2008 | free(ne->ne_name); |
34dc7c2f BB |
2009 | free(ne); |
2010 | } | |
2011 | ||
34dc7c2f BB |
2012 | return (ret); |
2013 | } | |
2014 | ||
b128c09f BB |
2015 | nvlist_t * |
2016 | zpool_find_import(libzfs_handle_t *hdl, int argc, char **argv) | |
2017 | { | |
428870ff | 2018 | importargs_t iarg = { 0 }; |
b128c09f | 2019 | |
428870ff BB |
2020 | iarg.paths = argc; |
2021 | iarg.path = argv; | |
b128c09f | 2022 | |
428870ff | 2023 | return (zpool_find_import_impl(hdl, &iarg)); |
b128c09f BB |
2024 | } |
2025 | ||
34dc7c2f BB |
2026 | /* |
2027 | * Given a cache file, return the contents as a list of importable pools. | |
b128c09f BB |
2028 | * poolname or guid (but not both) are provided by the caller when trying |
2029 | * to import a specific pool. | |
34dc7c2f BB |
2030 | */ |
2031 | nvlist_t * | |
2032 | zpool_find_import_cached(libzfs_handle_t *hdl, const char *cachefile, | |
b128c09f | 2033 | char *poolname, uint64_t guid) |
34dc7c2f BB |
2034 | { |
2035 | char *buf; | |
2036 | int fd; | |
2037 | struct stat64 statbuf; | |
2038 | nvlist_t *raw, *src, *dst; | |
2039 | nvlist_t *pools; | |
2040 | nvpair_t *elem; | |
2041 | char *name; | |
b128c09f | 2042 | uint64_t this_guid; |
34dc7c2f BB |
2043 | boolean_t active; |
2044 | ||
b128c09f BB |
2045 | verify(poolname == NULL || guid == 0); |
2046 | ||
34dc7c2f BB |
2047 | if ((fd = open(cachefile, O_RDONLY)) < 0) { |
2048 | zfs_error_aux(hdl, "%s", strerror(errno)); | |
2049 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2050 | dgettext(TEXT_DOMAIN, "failed to open cache file")); | |
2051 | return (NULL); | |
2052 | } | |
2053 | ||
2054 | if (fstat64(fd, &statbuf) != 0) { | |
2055 | zfs_error_aux(hdl, "%s", strerror(errno)); | |
2056 | (void) close(fd); | |
2057 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2058 | dgettext(TEXT_DOMAIN, "failed to get size of cache file")); | |
2059 | return (NULL); | |
2060 | } | |
2061 | ||
2062 | if ((buf = zfs_alloc(hdl, statbuf.st_size)) == NULL) { | |
2063 | (void) close(fd); | |
2064 | return (NULL); | |
2065 | } | |
2066 | ||
2067 | if (read(fd, buf, statbuf.st_size) != statbuf.st_size) { | |
2068 | (void) close(fd); | |
2069 | free(buf); | |
2070 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2071 | dgettext(TEXT_DOMAIN, | |
2072 | "failed to read cache file contents")); | |
2073 | return (NULL); | |
2074 | } | |
2075 | ||
2076 | (void) close(fd); | |
2077 | ||
2078 | if (nvlist_unpack(buf, statbuf.st_size, &raw, 0) != 0) { | |
2079 | free(buf); | |
2080 | (void) zfs_error(hdl, EZFS_BADCACHE, | |
2081 | dgettext(TEXT_DOMAIN, | |
2082 | "invalid or corrupt cache file contents")); | |
2083 | return (NULL); | |
2084 | } | |
2085 | ||
2086 | free(buf); | |
2087 | ||
2088 | /* | |
2089 | * Go through and get the current state of the pools and refresh their | |
2090 | * state. | |
2091 | */ | |
2092 | if (nvlist_alloc(&pools, 0, 0) != 0) { | |
2093 | (void) no_memory(hdl); | |
2094 | nvlist_free(raw); | |
2095 | return (NULL); | |
2096 | } | |
2097 | ||
2098 | elem = NULL; | |
2099 | while ((elem = nvlist_next_nvpair(raw, elem)) != NULL) { | |
ea04106b | 2100 | src = fnvpair_value_nvlist(elem); |
34dc7c2f | 2101 | |
ea04106b | 2102 | name = fnvlist_lookup_string(src, ZPOOL_CONFIG_POOL_NAME); |
b128c09f BB |
2103 | if (poolname != NULL && strcmp(poolname, name) != 0) |
2104 | continue; | |
2105 | ||
ea04106b AX |
2106 | this_guid = fnvlist_lookup_uint64(src, ZPOOL_CONFIG_POOL_GUID); |
2107 | if (guid != 0 && guid != this_guid) | |
2108 | continue; | |
34dc7c2f | 2109 | |
b128c09f BB |
2110 | if (pool_active(hdl, name, this_guid, &active) != 0) { |
2111 | nvlist_free(raw); | |
2112 | nvlist_free(pools); | |
2113 | return (NULL); | |
2114 | } | |
34dc7c2f | 2115 | |
b128c09f BB |
2116 | if (active) |
2117 | continue; | |
34dc7c2f | 2118 | |
b128c09f BB |
2119 | if ((dst = refresh_config(hdl, src)) == NULL) { |
2120 | nvlist_free(raw); | |
2121 | nvlist_free(pools); | |
2122 | return (NULL); | |
2123 | } | |
34dc7c2f | 2124 | |
b128c09f BB |
2125 | if (nvlist_add_nvlist(pools, nvpair_name(elem), dst) != 0) { |
2126 | (void) no_memory(hdl); | |
34dc7c2f | 2127 | nvlist_free(dst); |
b128c09f BB |
2128 | nvlist_free(raw); |
2129 | nvlist_free(pools); | |
2130 | return (NULL); | |
34dc7c2f | 2131 | } |
b128c09f | 2132 | nvlist_free(dst); |
34dc7c2f BB |
2133 | } |
2134 | ||
2135 | nvlist_free(raw); | |
2136 | return (pools); | |
2137 | } | |
2138 | ||
428870ff BB |
2139 | static int |
2140 | name_or_guid_exists(zpool_handle_t *zhp, void *data) | |
2141 | { | |
2142 | importargs_t *import = data; | |
2143 | int found = 0; | |
2144 | ||
2145 | if (import->poolname != NULL) { | |
2146 | char *pool_name; | |
2147 | ||
2148 | verify(nvlist_lookup_string(zhp->zpool_config, | |
2149 | ZPOOL_CONFIG_POOL_NAME, &pool_name) == 0); | |
2150 | if (strcmp(pool_name, import->poolname) == 0) | |
2151 | found = 1; | |
2152 | } else { | |
2153 | uint64_t pool_guid; | |
2154 | ||
2155 | verify(nvlist_lookup_uint64(zhp->zpool_config, | |
2156 | ZPOOL_CONFIG_POOL_GUID, &pool_guid) == 0); | |
2157 | if (pool_guid == import->guid) | |
2158 | found = 1; | |
2159 | } | |
2160 | ||
2161 | zpool_close(zhp); | |
2162 | return (found); | |
2163 | } | |
2164 | ||
2165 | nvlist_t * | |
2166 | zpool_search_import(libzfs_handle_t *hdl, importargs_t *import) | |
2167 | { | |
2168 | verify(import->poolname == NULL || import->guid == 0); | |
2169 | ||
2170 | if (import->unique) | |
2171 | import->exists = zpool_iter(hdl, name_or_guid_exists, import); | |
2172 | ||
2173 | if (import->cachefile != NULL) | |
2174 | return (zpool_find_import_cached(hdl, import->cachefile, | |
2175 | import->poolname, import->guid)); | |
2176 | ||
2177 | return (zpool_find_import_impl(hdl, import)); | |
2178 | } | |
34dc7c2f | 2179 | |
cae5b340 AX |
2180 | static boolean_t |
2181 | pool_match(nvlist_t *cfg, char *tgt) | |
2182 | { | |
2183 | uint64_t v, guid = strtoull(tgt, NULL, 0); | |
2184 | char *s; | |
2185 | ||
2186 | if (guid != 0) { | |
2187 | if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0) | |
2188 | return (v == guid); | |
2189 | } else { | |
2190 | if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0) | |
2191 | return (strcmp(s, tgt) == 0); | |
2192 | } | |
2193 | return (B_FALSE); | |
2194 | } | |
2195 | ||
2196 | int | |
2197 | zpool_tryimport(libzfs_handle_t *hdl, char *target, nvlist_t **configp, | |
2198 | importargs_t *args) | |
2199 | { | |
2200 | nvlist_t *pools; | |
2201 | nvlist_t *match = NULL; | |
2202 | nvlist_t *config = NULL; | |
2203 | char *name = NULL, *sepp = NULL; | |
2204 | char sep = '\0'; | |
2205 | int count = 0; | |
2206 | char *targetdup = strdup(target); | |
2207 | ||
2208 | *configp = NULL; | |
2209 | ||
2210 | if ((sepp = strpbrk(targetdup, "/@")) != NULL) { | |
2211 | sep = *sepp; | |
2212 | *sepp = '\0'; | |
2213 | } | |
2214 | ||
2215 | pools = zpool_search_import(hdl, args); | |
2216 | ||
2217 | if (pools != NULL) { | |
2218 | nvpair_t *elem = NULL; | |
2219 | while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) { | |
2220 | VERIFY0(nvpair_value_nvlist(elem, &config)); | |
2221 | if (pool_match(config, targetdup)) { | |
2222 | count++; | |
2223 | if (match != NULL) { | |
2224 | /* multiple matches found */ | |
2225 | continue; | |
2226 | } else { | |
2227 | match = config; | |
2228 | name = nvpair_name(elem); | |
2229 | } | |
2230 | } | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | if (count == 0) { | |
2235 | (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2236 | "no pools found")); | |
2237 | free(targetdup); | |
2238 | return (ENOENT); | |
2239 | } | |
2240 | ||
2241 | if (count > 1) { | |
2242 | (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, | |
2243 | "%d pools found, use pool GUID\n"), count); | |
2244 | free(targetdup); | |
2245 | return (EINVAL); | |
2246 | } | |
2247 | ||
2248 | *configp = match; | |
2249 | free(targetdup); | |
2250 | ||
2251 | return (0); | |
2252 | } | |
2253 | ||
34dc7c2f BB |
2254 | boolean_t |
2255 | find_guid(nvlist_t *nv, uint64_t guid) | |
2256 | { | |
2257 | uint64_t tmp; | |
2258 | nvlist_t **child; | |
2259 | uint_t c, children; | |
2260 | ||
2261 | verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &tmp) == 0); | |
2262 | if (tmp == guid) | |
2263 | return (B_TRUE); | |
2264 | ||
2265 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
2266 | &child, &children) == 0) { | |
2267 | for (c = 0; c < children; c++) | |
2268 | if (find_guid(child[c], guid)) | |
2269 | return (B_TRUE); | |
2270 | } | |
2271 | ||
2272 | return (B_FALSE); | |
2273 | } | |
2274 | ||
2275 | typedef struct aux_cbdata { | |
2276 | const char *cb_type; | |
2277 | uint64_t cb_guid; | |
2278 | zpool_handle_t *cb_zhp; | |
2279 | } aux_cbdata_t; | |
2280 | ||
2281 | static int | |
2282 | find_aux(zpool_handle_t *zhp, void *data) | |
2283 | { | |
2284 | aux_cbdata_t *cbp = data; | |
2285 | nvlist_t **list; | |
2286 | uint_t i, count; | |
2287 | uint64_t guid; | |
2288 | nvlist_t *nvroot; | |
2289 | ||
2290 | verify(nvlist_lookup_nvlist(zhp->zpool_config, ZPOOL_CONFIG_VDEV_TREE, | |
2291 | &nvroot) == 0); | |
2292 | ||
2293 | if (nvlist_lookup_nvlist_array(nvroot, cbp->cb_type, | |
2294 | &list, &count) == 0) { | |
2295 | for (i = 0; i < count; i++) { | |
2296 | verify(nvlist_lookup_uint64(list[i], | |
2297 | ZPOOL_CONFIG_GUID, &guid) == 0); | |
2298 | if (guid == cbp->cb_guid) { | |
2299 | cbp->cb_zhp = zhp; | |
2300 | return (1); | |
2301 | } | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | zpool_close(zhp); | |
2306 | return (0); | |
2307 | } | |
2308 | ||
2309 | /* | |
2310 | * Determines if the pool is in use. If so, it returns true and the state of | |
8ec27e97 | 2311 | * the pool as well as the name of the pool. Name string is allocated and |
34dc7c2f BB |
2312 | * must be freed by the caller. |
2313 | */ | |
2314 | int | |
2315 | zpool_in_use(libzfs_handle_t *hdl, int fd, pool_state_t *state, char **namestr, | |
2316 | boolean_t *inuse) | |
2317 | { | |
2318 | nvlist_t *config; | |
2319 | char *name; | |
2320 | boolean_t ret; | |
2321 | uint64_t guid, vdev_guid; | |
2322 | zpool_handle_t *zhp; | |
2323 | nvlist_t *pool_config; | |
2324 | uint64_t stateval, isspare; | |
2325 | aux_cbdata_t cb = { 0 }; | |
2326 | boolean_t isactive; | |
2327 | ||
2328 | *inuse = B_FALSE; | |
2329 | ||
ea04106b | 2330 | if (zpool_read_label(fd, &config, NULL) != 0) { |
34dc7c2f BB |
2331 | (void) no_memory(hdl); |
2332 | return (-1); | |
2333 | } | |
2334 | ||
2335 | if (config == NULL) | |
2336 | return (0); | |
2337 | ||
2338 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
2339 | &stateval) == 0); | |
2340 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, | |
2341 | &vdev_guid) == 0); | |
2342 | ||
2343 | if (stateval != POOL_STATE_SPARE && stateval != POOL_STATE_L2CACHE) { | |
2344 | verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, | |
2345 | &name) == 0); | |
2346 | verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
2347 | &guid) == 0); | |
2348 | } | |
2349 | ||
2350 | switch (stateval) { | |
2351 | case POOL_STATE_EXPORTED: | |
572e2857 BB |
2352 | /* |
2353 | * A pool with an exported state may in fact be imported | |
2354 | * read-only, so check the in-core state to see if it's | |
2355 | * active and imported read-only. If it is, set | |
2356 | * its state to active. | |
2357 | */ | |
2358 | if (pool_active(hdl, name, guid, &isactive) == 0 && isactive && | |
e10b0808 AX |
2359 | (zhp = zpool_open_canfail(hdl, name)) != NULL) { |
2360 | if (zpool_get_prop_int(zhp, ZPOOL_PROP_READONLY, NULL)) | |
2361 | stateval = POOL_STATE_ACTIVE; | |
2362 | ||
2363 | /* | |
2364 | * All we needed the zpool handle for is the | |
2365 | * readonly prop check. | |
2366 | */ | |
2367 | zpool_close(zhp); | |
2368 | } | |
572e2857 | 2369 | |
34dc7c2f BB |
2370 | ret = B_TRUE; |
2371 | break; | |
2372 | ||
2373 | case POOL_STATE_ACTIVE: | |
2374 | /* | |
2375 | * For an active pool, we have to determine if it's really part | |
2376 | * of a currently active pool (in which case the pool will exist | |
2377 | * and the guid will be the same), or whether it's part of an | |
2378 | * active pool that was disconnected without being explicitly | |
2379 | * exported. | |
2380 | */ | |
2381 | if (pool_active(hdl, name, guid, &isactive) != 0) { | |
2382 | nvlist_free(config); | |
2383 | return (-1); | |
2384 | } | |
2385 | ||
2386 | if (isactive) { | |
2387 | /* | |
2388 | * Because the device may have been removed while | |
2389 | * offlined, we only report it as active if the vdev is | |
2390 | * still present in the config. Otherwise, pretend like | |
2391 | * it's not in use. | |
2392 | */ | |
2393 | if ((zhp = zpool_open_canfail(hdl, name)) != NULL && | |
2394 | (pool_config = zpool_get_config(zhp, NULL)) | |
2395 | != NULL) { | |
2396 | nvlist_t *nvroot; | |
2397 | ||
2398 | verify(nvlist_lookup_nvlist(pool_config, | |
2399 | ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
2400 | ret = find_guid(nvroot, vdev_guid); | |
2401 | } else { | |
2402 | ret = B_FALSE; | |
2403 | } | |
2404 | ||
2405 | /* | |
2406 | * If this is an active spare within another pool, we | |
2407 | * treat it like an unused hot spare. This allows the | |
2408 | * user to create a pool with a hot spare that currently | |
2409 | * in use within another pool. Since we return B_TRUE, | |
2410 | * libdiskmgt will continue to prevent generic consumers | |
2411 | * from using the device. | |
2412 | */ | |
2413 | if (ret && nvlist_lookup_uint64(config, | |
2414 | ZPOOL_CONFIG_IS_SPARE, &isspare) == 0 && isspare) | |
2415 | stateval = POOL_STATE_SPARE; | |
2416 | ||
2417 | if (zhp != NULL) | |
2418 | zpool_close(zhp); | |
2419 | } else { | |
2420 | stateval = POOL_STATE_POTENTIALLY_ACTIVE; | |
2421 | ret = B_TRUE; | |
2422 | } | |
2423 | break; | |
2424 | ||
2425 | case POOL_STATE_SPARE: | |
2426 | /* | |
2427 | * For a hot spare, it can be either definitively in use, or | |
2428 | * potentially active. To determine if it's in use, we iterate | |
2429 | * over all pools in the system and search for one with a spare | |
2430 | * with a matching guid. | |
2431 | * | |
2432 | * Due to the shared nature of spares, we don't actually report | |
2433 | * the potentially active case as in use. This means the user | |
2434 | * can freely create pools on the hot spares of exported pools, | |
2435 | * but to do otherwise makes the resulting code complicated, and | |
2436 | * we end up having to deal with this case anyway. | |
2437 | */ | |
2438 | cb.cb_zhp = NULL; | |
2439 | cb.cb_guid = vdev_guid; | |
2440 | cb.cb_type = ZPOOL_CONFIG_SPARES; | |
2441 | if (zpool_iter(hdl, find_aux, &cb) == 1) { | |
2442 | name = (char *)zpool_get_name(cb.cb_zhp); | |
cae5b340 | 2443 | ret = B_TRUE; |
34dc7c2f | 2444 | } else { |
cae5b340 | 2445 | ret = B_FALSE; |
34dc7c2f BB |
2446 | } |
2447 | break; | |
2448 | ||
2449 | case POOL_STATE_L2CACHE: | |
2450 | ||
2451 | /* | |
2452 | * Check if any pool is currently using this l2cache device. | |
2453 | */ | |
2454 | cb.cb_zhp = NULL; | |
2455 | cb.cb_guid = vdev_guid; | |
2456 | cb.cb_type = ZPOOL_CONFIG_L2CACHE; | |
2457 | if (zpool_iter(hdl, find_aux, &cb) == 1) { | |
2458 | name = (char *)zpool_get_name(cb.cb_zhp); | |
cae5b340 | 2459 | ret = B_TRUE; |
34dc7c2f | 2460 | } else { |
cae5b340 | 2461 | ret = B_FALSE; |
34dc7c2f BB |
2462 | } |
2463 | break; | |
2464 | ||
2465 | default: | |
2466 | ret = B_FALSE; | |
2467 | } | |
2468 | ||
2469 | ||
2470 | if (ret) { | |
2471 | if ((*namestr = zfs_strdup(hdl, name)) == NULL) { | |
2472 | if (cb.cb_zhp) | |
2473 | zpool_close(cb.cb_zhp); | |
2474 | nvlist_free(config); | |
2475 | return (-1); | |
2476 | } | |
2477 | *state = (pool_state_t)stateval; | |
2478 | } | |
2479 | ||
2480 | if (cb.cb_zhp) | |
2481 | zpool_close(cb.cb_zhp); | |
2482 | ||
2483 | nvlist_free(config); | |
2484 | *inuse = ret; | |
2485 | return (0); | |
2486 | } |