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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
d96eb2b1 | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
a08ee875 | 25 | * Copyright (c) 2013 by Delphix. All rights reserved. |
34dc7c2f BB |
26 | */ |
27 | ||
34dc7c2f BB |
28 | #include <sys/spa.h> |
29 | #include <sys/spa_impl.h> | |
30 | #include <sys/nvpair.h> | |
31 | #include <sys/uio.h> | |
32 | #include <sys/fs/zfs.h> | |
33 | #include <sys/vdev_impl.h> | |
34 | #include <sys/zfs_ioctl.h> | |
34dc7c2f BB |
35 | #include <sys/systeminfo.h> |
36 | #include <sys/sunddi.h> | |
9ae529ec | 37 | #include <sys/zfeature.h> |
34dc7c2f BB |
38 | #ifdef _KERNEL |
39 | #include <sys/kobj.h> | |
d164b209 | 40 | #include <sys/zone.h> |
34dc7c2f BB |
41 | #endif |
42 | ||
43 | /* | |
44 | * Pool configuration repository. | |
45 | * | |
46 | * Pool configuration is stored as a packed nvlist on the filesystem. By | |
47 | * default, all pools are stored in /etc/zfs/zpool.cache and loaded on boot | |
48 | * (when the ZFS module is loaded). Pools can also have the 'cachefile' | |
49 | * property set that allows them to be stored in an alternate location until | |
50 | * the control of external software. | |
51 | * | |
52 | * For each cache file, we have a single nvlist which holds all the | |
53 | * configuration information. When the module loads, we read this information | |
54 | * from /etc/zfs/zpool.cache and populate the SPA namespace. This namespace is | |
55 | * maintained independently in spa.c. Whenever the namespace is modified, or | |
56 | * the configuration of a pool is changed, we call spa_config_sync(), which | |
57 | * walks through all the active pools and writes the configuration to disk. | |
58 | */ | |
59 | ||
60 | static uint64_t spa_config_generation = 1; | |
61 | ||
62 | /* | |
63 | * This can be overridden in userland to preserve an alternate namespace for | |
64 | * userland pools when doing testing. | |
65 | */ | |
c28b2279 | 66 | char *spa_config_path = ZPOOL_CACHE; |
ea04106b | 67 | int zfs_autoimport_disable = 1; |
34dc7c2f BB |
68 | |
69 | /* | |
70 | * Called when the module is first loaded, this routine loads the configuration | |
71 | * file into the SPA namespace. It does not actually open or load the pools; it | |
72 | * only populates the namespace. | |
73 | */ | |
74 | void | |
75 | spa_config_load(void) | |
76 | { | |
77 | void *buf = NULL; | |
78 | nvlist_t *nvlist, *child; | |
79 | nvpair_t *nvpair; | |
b128c09f | 80 | char *pathname; |
34dc7c2f BB |
81 | struct _buf *file; |
82 | uint64_t fsize; | |
83 | ||
ea04106b | 84 | #ifdef _KERNEL |
c06d4368 AX |
85 | if (zfs_autoimport_disable) |
86 | return; | |
ea04106b | 87 | #endif |
c06d4368 | 88 | |
34dc7c2f BB |
89 | /* |
90 | * Open the configuration file. | |
91 | */ | |
ea04106b | 92 | pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP); |
b128c09f BB |
93 | |
94 | (void) snprintf(pathname, MAXPATHLEN, "%s%s", | |
95 | (rootdir != NULL) ? "./" : "", spa_config_path); | |
34dc7c2f BB |
96 | |
97 | file = kobj_open_file(pathname); | |
b128c09f BB |
98 | |
99 | kmem_free(pathname, MAXPATHLEN); | |
100 | ||
34dc7c2f BB |
101 | if (file == (struct _buf *)-1) |
102 | return; | |
103 | ||
104 | if (kobj_get_filesize(file, &fsize) != 0) | |
105 | goto out; | |
106 | ||
ea04106b | 107 | buf = kmem_alloc(fsize, KM_SLEEP); |
34dc7c2f BB |
108 | |
109 | /* | |
110 | * Read the nvlist from the file. | |
111 | */ | |
112 | if (kobj_read_file(file, buf, fsize, 0) < 0) | |
113 | goto out; | |
114 | ||
115 | /* | |
116 | * Unpack the nvlist. | |
117 | */ | |
ea04106b | 118 | if (nvlist_unpack(buf, fsize, &nvlist, KM_SLEEP) != 0) |
34dc7c2f BB |
119 | goto out; |
120 | ||
121 | /* | |
122 | * Iterate over all elements in the nvlist, creating a new spa_t for | |
123 | * each one with the specified configuration. | |
124 | */ | |
125 | mutex_enter(&spa_namespace_lock); | |
126 | nvpair = NULL; | |
127 | while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) { | |
34dc7c2f BB |
128 | if (nvpair_type(nvpair) != DATA_TYPE_NVLIST) |
129 | continue; | |
130 | ||
131 | VERIFY(nvpair_value_nvlist(nvpair, &child) == 0); | |
132 | ||
133 | if (spa_lookup(nvpair_name(nvpair)) != NULL) | |
134 | continue; | |
428870ff | 135 | (void) spa_add(nvpair_name(nvpair), child, NULL); |
34dc7c2f BB |
136 | } |
137 | mutex_exit(&spa_namespace_lock); | |
138 | ||
139 | nvlist_free(nvlist); | |
140 | ||
141 | out: | |
142 | if (buf != NULL) | |
143 | kmem_free(buf, fsize); | |
144 | ||
145 | kobj_close_file(file); | |
146 | } | |
147 | ||
34dc7c2f | 148 | static void |
b128c09f | 149 | spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl) |
34dc7c2f | 150 | { |
34dc7c2f BB |
151 | size_t buflen; |
152 | char *buf; | |
153 | vnode_t *vp; | |
154 | int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX; | |
e10b0808 | 155 | int error; |
b128c09f BB |
156 | char *temp; |
157 | ||
158 | /* | |
159 | * If the nvlist is empty (NULL), then remove the old cachefile. | |
160 | */ | |
161 | if (nvl == NULL) { | |
162 | (void) vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); | |
163 | return; | |
164 | } | |
34dc7c2f BB |
165 | |
166 | /* | |
167 | * Pack the configuration into a buffer. | |
168 | */ | |
b128c09f | 169 | VERIFY(nvlist_size(nvl, &buflen, NV_ENCODE_XDR) == 0); |
34dc7c2f | 170 | |
ea04106b AX |
171 | buf = vmem_alloc(buflen, KM_SLEEP); |
172 | temp = kmem_zalloc(MAXPATHLEN, KM_SLEEP); | |
34dc7c2f | 173 | |
b128c09f | 174 | VERIFY(nvlist_pack(nvl, &buf, &buflen, NV_ENCODE_XDR, |
ea04106b | 175 | KM_SLEEP) == 0); |
34dc7c2f | 176 | |
87dac73d | 177 | #if defined(__linux__) && defined(_KERNEL) |
e10b0808 AX |
178 | /* |
179 | * Write the configuration to disk. Due to the complexity involved | |
180 | * in performing a rename from within the kernel the file is truncated | |
181 | * and overwritten in place. In the event of an error the file is | |
182 | * unlinked to make sure we always have a consistent view of the data. | |
183 | */ | |
184 | error = vn_open(dp->scd_path, UIO_SYSSPACE, oflags, 0644, &vp, 0, 0); | |
185 | if (error == 0) { | |
186 | error = vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, | |
187 | UIO_SYSSPACE, 0, RLIM64_INFINITY, kcred, NULL); | |
188 | if (error == 0) | |
189 | error = VOP_FSYNC(vp, FSYNC, kcred, NULL); | |
190 | ||
191 | (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); | |
192 | ||
193 | if (error) | |
194 | (void) vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); | |
195 | } | |
196 | #else | |
34dc7c2f BB |
197 | /* |
198 | * Write the configuration to disk. We need to do the traditional | |
199 | * 'write to temporary file, sync, move over original' to make sure we | |
200 | * always have a consistent view of the data. | |
201 | */ | |
b128c09f | 202 | (void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path); |
34dc7c2f | 203 | |
87dac73d AX |
204 | error = vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0); |
205 | if (error == 0) { | |
b128c09f BB |
206 | if (vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, |
207 | 0, RLIM64_INFINITY, kcred, NULL) == 0 && | |
208 | VOP_FSYNC(vp, FSYNC, kcred, NULL) == 0) { | |
209 | (void) vn_rename(temp, dp->scd_path, UIO_SYSSPACE); | |
210 | } | |
211 | (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); | |
34dc7c2f BB |
212 | } |
213 | ||
b128c09f | 214 | (void) vn_remove(temp, UIO_SYSSPACE, RMFILE); |
e10b0808 | 215 | #endif |
34dc7c2f | 216 | |
ea04106b | 217 | vmem_free(buf, buflen); |
b128c09f | 218 | kmem_free(temp, MAXPATHLEN); |
34dc7c2f BB |
219 | } |
220 | ||
221 | /* | |
b128c09f | 222 | * Synchronize pool configuration to disk. This must be called with the |
a08ee875 LG |
223 | * namespace lock held. Synchronizing the pool cache is typically done after |
224 | * the configuration has been synced to the MOS. This exposes a window where | |
225 | * the MOS config will have been updated but the cache file has not. If | |
226 | * the system were to crash at that instant then the cached config may not | |
227 | * contain the correct information to open the pool and an explicity import | |
228 | * would be required. | |
34dc7c2f BB |
229 | */ |
230 | void | |
b128c09f | 231 | spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent) |
34dc7c2f | 232 | { |
b128c09f BB |
233 | spa_config_dirent_t *dp, *tdp; |
234 | nvlist_t *nvl; | |
ea04106b | 235 | char *pool_name; |
34dc7c2f BB |
236 | |
237 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
238 | ||
45d1cae3 | 239 | if (rootdir == NULL || !(spa_mode_global & FWRITE)) |
fb5f0bc8 BB |
240 | return; |
241 | ||
b128c09f BB |
242 | /* |
243 | * Iterate over all cachefiles for the pool, past or present. When the | |
244 | * cachefile is changed, the new one is pushed onto this list, allowing | |
245 | * us to update previous cachefiles that no longer contain this pool. | |
246 | */ | |
247 | for (dp = list_head(&target->spa_config_list); dp != NULL; | |
248 | dp = list_next(&target->spa_config_list, dp)) { | |
249 | spa_t *spa = NULL; | |
250 | if (dp->scd_path == NULL) | |
251 | continue; | |
252 | ||
253 | /* | |
254 | * Iterate over all pools, adding any matching pools to 'nvl'. | |
255 | */ | |
256 | nvl = NULL; | |
257 | while ((spa = spa_next(spa)) != NULL) { | |
c06d4368 AX |
258 | /* |
259 | * Skip over our own pool if we're about to remove | |
260 | * ourselves from the spa namespace or any pool that | |
261 | * is readonly. Since we cannot guarantee that a | |
262 | * readonly pool would successfully import upon reboot, | |
263 | * we don't allow them to be written to the cache file. | |
264 | */ | |
265 | if ((spa == target && removing) || | |
266 | !spa_writeable(spa)) | |
b128c09f BB |
267 | continue; |
268 | ||
269 | mutex_enter(&spa->spa_props_lock); | |
270 | tdp = list_head(&spa->spa_config_list); | |
271 | if (spa->spa_config == NULL || | |
272 | tdp->scd_path == NULL || | |
273 | strcmp(tdp->scd_path, dp->scd_path) != 0) { | |
274 | mutex_exit(&spa->spa_props_lock); | |
275 | continue; | |
276 | } | |
277 | ||
278 | if (nvl == NULL) | |
279 | VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, | |
ea04106b AX |
280 | KM_SLEEP) == 0); |
281 | ||
282 | if (spa->spa_import_flags & ZFS_IMPORT_TEMP_NAME) { | |
283 | VERIFY0(nvlist_lookup_string(spa->spa_config, | |
284 | ZPOOL_CONFIG_POOL_NAME, &pool_name)); | |
285 | } else | |
286 | pool_name = spa_name(spa); | |
b128c09f | 287 | |
ea04106b | 288 | VERIFY(nvlist_add_nvlist(nvl, pool_name, |
b128c09f BB |
289 | spa->spa_config) == 0); |
290 | mutex_exit(&spa->spa_props_lock); | |
291 | } | |
292 | ||
293 | spa_config_write(dp, nvl); | |
294 | nvlist_free(nvl); | |
295 | } | |
34dc7c2f BB |
296 | |
297 | /* | |
b128c09f | 298 | * Remove any config entries older than the current one. |
34dc7c2f | 299 | */ |
b128c09f BB |
300 | dp = list_head(&target->spa_config_list); |
301 | while ((tdp = list_next(&target->spa_config_list, dp)) != NULL) { | |
302 | list_remove(&target->spa_config_list, tdp); | |
303 | if (tdp->scd_path != NULL) | |
304 | spa_strfree(tdp->scd_path); | |
305 | kmem_free(tdp, sizeof (spa_config_dirent_t)); | |
34dc7c2f BB |
306 | } |
307 | ||
308 | spa_config_generation++; | |
b128c09f BB |
309 | |
310 | if (postsysevent) | |
26685276 | 311 | spa_event_notify(target, NULL, FM_EREPORT_ZFS_CONFIG_SYNC); |
34dc7c2f BB |
312 | } |
313 | ||
314 | /* | |
315 | * Sigh. Inside a local zone, we don't have access to /etc/zfs/zpool.cache, | |
316 | * and we don't want to allow the local zone to see all the pools anyway. | |
317 | * So we have to invent the ZFS_IOC_CONFIG ioctl to grab the configuration | |
318 | * information for all pool visible within the zone. | |
319 | */ | |
320 | nvlist_t * | |
321 | spa_all_configs(uint64_t *generation) | |
322 | { | |
323 | nvlist_t *pools; | |
b128c09f | 324 | spa_t *spa = NULL; |
34dc7c2f BB |
325 | |
326 | if (*generation == spa_config_generation) | |
327 | return (NULL); | |
328 | ||
ea04106b | 329 | VERIFY(nvlist_alloc(&pools, NV_UNIQUE_NAME, KM_SLEEP) == 0); |
34dc7c2f | 330 | |
34dc7c2f BB |
331 | mutex_enter(&spa_namespace_lock); |
332 | while ((spa = spa_next(spa)) != NULL) { | |
333 | if (INGLOBALZONE(curproc) || | |
334 | zone_dataset_visible(spa_name(spa), NULL)) { | |
b128c09f | 335 | mutex_enter(&spa->spa_props_lock); |
34dc7c2f BB |
336 | VERIFY(nvlist_add_nvlist(pools, spa_name(spa), |
337 | spa->spa_config) == 0); | |
b128c09f | 338 | mutex_exit(&spa->spa_props_lock); |
34dc7c2f BB |
339 | } |
340 | } | |
34dc7c2f | 341 | *generation = spa_config_generation; |
b128c09f | 342 | mutex_exit(&spa_namespace_lock); |
34dc7c2f BB |
343 | |
344 | return (pools); | |
345 | } | |
346 | ||
347 | void | |
348 | spa_config_set(spa_t *spa, nvlist_t *config) | |
349 | { | |
b128c09f | 350 | mutex_enter(&spa->spa_props_lock); |
34dc7c2f BB |
351 | if (spa->spa_config != NULL) |
352 | nvlist_free(spa->spa_config); | |
353 | spa->spa_config = config; | |
b128c09f | 354 | mutex_exit(&spa->spa_props_lock); |
34dc7c2f BB |
355 | } |
356 | ||
357 | /* | |
358 | * Generate the pool's configuration based on the current in-core state. | |
a08ee875 | 359 | * |
34dc7c2f BB |
360 | * We infer whether to generate a complete config or just one top-level config |
361 | * based on whether vd is the root vdev. | |
362 | */ | |
363 | nvlist_t * | |
364 | spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats) | |
365 | { | |
366 | nvlist_t *config, *nvroot; | |
367 | vdev_t *rvd = spa->spa_root_vdev; | |
368 | unsigned long hostid = 0; | |
b128c09f | 369 | boolean_t locked = B_FALSE; |
428870ff | 370 | uint64_t split_guid; |
ea04106b | 371 | char *pool_name; |
34dc7c2f | 372 | |
b128c09f | 373 | if (vd == NULL) { |
34dc7c2f | 374 | vd = rvd; |
b128c09f BB |
375 | locked = B_TRUE; |
376 | spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); | |
377 | } | |
378 | ||
379 | ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) == | |
380 | (SCL_CONFIG | SCL_STATE)); | |
34dc7c2f BB |
381 | |
382 | /* | |
383 | * If txg is -1, report the current value of spa->spa_config_txg. | |
384 | */ | |
385 | if (txg == -1ULL) | |
386 | txg = spa->spa_config_txg; | |
387 | ||
ea04106b AX |
388 | /* |
389 | * Originally, users had to handle spa namespace collisions by either | |
390 | * exporting the already imported pool or by specifying a new name for | |
391 | * the pool with a conflicting name. In the case of root pools from | |
392 | * virtual guests, neither approach to collision resolution is | |
393 | * reasonable. This is addressed by extending the new name syntax with | |
394 | * an option to specify that the new name is temporary. When specified, | |
395 | * ZFS_IMPORT_TEMP_NAME will be set in spa->spa_import_flags to tell us | |
396 | * to use the previous name, which we do below. | |
397 | */ | |
398 | if (spa->spa_import_flags & ZFS_IMPORT_TEMP_NAME) { | |
399 | VERIFY0(nvlist_lookup_string(spa->spa_config, | |
400 | ZPOOL_CONFIG_POOL_NAME, &pool_name)); | |
401 | } else | |
402 | pool_name = spa_name(spa); | |
403 | ||
404 | VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
34dc7c2f BB |
405 | |
406 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, | |
407 | spa_version(spa)) == 0); | |
408 | VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, | |
ea04106b | 409 | pool_name) == 0); |
34dc7c2f BB |
410 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, |
411 | spa_state(spa)) == 0); | |
412 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, | |
413 | txg) == 0); | |
414 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
415 | spa_guid(spa)) == 0); | |
ea04106b AX |
416 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_ERRATA, |
417 | spa->spa_errata) == 0); | |
d96eb2b1 DM |
418 | VERIFY(spa->spa_comment == NULL || nvlist_add_string(config, |
419 | ZPOOL_CONFIG_COMMENT, spa->spa_comment) == 0); | |
420 | ||
421 | ||
d164b209 BB |
422 | #ifdef _KERNEL |
423 | hostid = zone_get_hostid(NULL); | |
424 | #else /* _KERNEL */ | |
425 | /* | |
426 | * We're emulating the system's hostid in userland, so we can't use | |
427 | * zone_get_hostid(). | |
428 | */ | |
34dc7c2f | 429 | (void) ddi_strtoul(hw_serial, NULL, 10, &hostid); |
d164b209 | 430 | #endif /* _KERNEL */ |
34dc7c2f BB |
431 | if (hostid != 0) { |
432 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, | |
433 | hostid) == 0); | |
434 | } | |
ea04106b AX |
435 | VERIFY0(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, |
436 | utsname()->nodename)); | |
34dc7c2f BB |
437 | |
438 | if (vd != rvd) { | |
439 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID, | |
440 | vd->vdev_top->vdev_guid) == 0); | |
441 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_GUID, | |
442 | vd->vdev_guid) == 0); | |
443 | if (vd->vdev_isspare) | |
444 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_SPARE, | |
445 | 1ULL) == 0); | |
446 | if (vd->vdev_islog) | |
447 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_LOG, | |
448 | 1ULL) == 0); | |
449 | vd = vd->vdev_top; /* label contains top config */ | |
428870ff BB |
450 | } else { |
451 | /* | |
452 | * Only add the (potentially large) split information | |
453 | * in the mos config, and not in the vdev labels | |
454 | */ | |
455 | if (spa->spa_config_splitting != NULL) | |
456 | VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_SPLIT, | |
457 | spa->spa_config_splitting) == 0); | |
34dc7c2f BB |
458 | } |
459 | ||
428870ff BB |
460 | /* |
461 | * Add the top-level config. We even add this on pools which | |
572e2857 | 462 | * don't support holes in the namespace. |
428870ff BB |
463 | */ |
464 | vdev_top_config_generate(spa, config); | |
465 | ||
466 | /* | |
467 | * If we're splitting, record the original pool's guid. | |
468 | */ | |
469 | if (spa->spa_config_splitting != NULL && | |
470 | nvlist_lookup_uint64(spa->spa_config_splitting, | |
471 | ZPOOL_CONFIG_SPLIT_GUID, &split_guid) == 0) { | |
472 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_SPLIT_GUID, | |
473 | split_guid) == 0); | |
474 | } | |
475 | ||
476 | nvroot = vdev_config_generate(spa, vd, getstats, 0); | |
34dc7c2f BB |
477 | VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); |
478 | nvlist_free(nvroot); | |
479 | ||
9ae529ec CS |
480 | /* |
481 | * Store what's necessary for reading the MOS in the label. | |
482 | */ | |
483 | VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, | |
484 | spa->spa_label_features) == 0); | |
485 | ||
428870ff BB |
486 | if (getstats && spa_load_state(spa) == SPA_LOAD_NONE) { |
487 | ddt_histogram_t *ddh; | |
488 | ddt_stat_t *dds; | |
489 | ddt_object_t *ddo; | |
490 | ||
ea04106b | 491 | ddh = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); |
428870ff BB |
492 | ddt_get_dedup_histogram(spa, ddh); |
493 | VERIFY(nvlist_add_uint64_array(config, | |
494 | ZPOOL_CONFIG_DDT_HISTOGRAM, | |
495 | (uint64_t *)ddh, sizeof (*ddh) / sizeof (uint64_t)) == 0); | |
496 | kmem_free(ddh, sizeof (ddt_histogram_t)); | |
497 | ||
ea04106b | 498 | ddo = kmem_zalloc(sizeof (ddt_object_t), KM_SLEEP); |
428870ff BB |
499 | ddt_get_dedup_object_stats(spa, ddo); |
500 | VERIFY(nvlist_add_uint64_array(config, | |
501 | ZPOOL_CONFIG_DDT_OBJ_STATS, | |
502 | (uint64_t *)ddo, sizeof (*ddo) / sizeof (uint64_t)) == 0); | |
503 | kmem_free(ddo, sizeof (ddt_object_t)); | |
504 | ||
ea04106b | 505 | dds = kmem_zalloc(sizeof (ddt_stat_t), KM_SLEEP); |
428870ff BB |
506 | ddt_get_dedup_stats(spa, dds); |
507 | VERIFY(nvlist_add_uint64_array(config, | |
508 | ZPOOL_CONFIG_DDT_STATS, | |
509 | (uint64_t *)dds, sizeof (*dds) / sizeof (uint64_t)) == 0); | |
510 | kmem_free(dds, sizeof (ddt_stat_t)); | |
511 | } | |
512 | ||
b128c09f BB |
513 | if (locked) |
514 | spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); | |
515 | ||
34dc7c2f BB |
516 | return (config); |
517 | } | |
518 | ||
34dc7c2f BB |
519 | /* |
520 | * Update all disk labels, generate a fresh config based on the current | |
521 | * in-core state, and sync the global config cache (do not sync the config | |
522 | * cache if this is a booting rootpool). | |
523 | */ | |
524 | void | |
45d1cae3 | 525 | spa_config_update(spa_t *spa, int what) |
34dc7c2f BB |
526 | { |
527 | vdev_t *rvd = spa->spa_root_vdev; | |
528 | uint64_t txg; | |
529 | int c; | |
530 | ||
531 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
532 | ||
b128c09f | 533 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); |
34dc7c2f BB |
534 | txg = spa_last_synced_txg(spa) + 1; |
535 | if (what == SPA_CONFIG_UPDATE_POOL) { | |
536 | vdev_config_dirty(rvd); | |
537 | } else { | |
538 | /* | |
539 | * If we have top-level vdevs that were added but have | |
540 | * not yet been prepared for allocation, do that now. | |
541 | * (It's safe now because the config cache is up to date, | |
542 | * so it will be able to translate the new DVAs.) | |
543 | * See comments in spa_vdev_add() for full details. | |
544 | */ | |
545 | for (c = 0; c < rvd->vdev_children; c++) { | |
546 | vdev_t *tvd = rvd->vdev_child[c]; | |
9babb374 BB |
547 | if (tvd->vdev_ms_array == 0) |
548 | vdev_metaslab_set_size(tvd); | |
549 | vdev_expand(tvd, txg); | |
34dc7c2f BB |
550 | } |
551 | } | |
b128c09f | 552 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
553 | |
554 | /* | |
555 | * Wait for the mosconfig to be regenerated and synced. | |
556 | */ | |
557 | txg_wait_synced(spa->spa_dsl_pool, txg); | |
558 | ||
559 | /* | |
560 | * Update the global config cache to reflect the new mosconfig. | |
561 | */ | |
45d1cae3 | 562 | if (!spa->spa_is_root) |
b128c09f | 563 | spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL); |
34dc7c2f BB |
564 | |
565 | if (what == SPA_CONFIG_UPDATE_POOL) | |
45d1cae3 | 566 | spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS); |
34dc7c2f | 567 | } |
c28b2279 BB |
568 | |
569 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
570 | EXPORT_SYMBOL(spa_config_sync); | |
571 | EXPORT_SYMBOL(spa_config_load); | |
572 | EXPORT_SYMBOL(spa_all_configs); | |
573 | EXPORT_SYMBOL(spa_config_set); | |
574 | EXPORT_SYMBOL(spa_config_generate); | |
575 | EXPORT_SYMBOL(spa_config_update); | |
576 | ||
577 | module_param(spa_config_path, charp, 0444); | |
578 | MODULE_PARM_DESC(spa_config_path, "SPA config file (/etc/zfs/zpool.cache)"); | |
c06d4368 AX |
579 | |
580 | module_param(zfs_autoimport_disable, int, 0644); | |
581 | MODULE_PARM_DESC(zfs_autoimport_disable, "Disable pool import at module load"); | |
582 | ||
c28b2279 | 583 | #endif |