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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. |
5d1f7fb6 | 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> | |
35 | #include <sys/utsname.h> | |
36 | #include <sys/systeminfo.h> | |
37 | #include <sys/sunddi.h> | |
9ae529ec | 38 | #include <sys/zfeature.h> |
34dc7c2f BB |
39 | #ifdef _KERNEL |
40 | #include <sys/kobj.h> | |
d164b209 | 41 | #include <sys/zone.h> |
34dc7c2f BB |
42 | #endif |
43 | ||
44 | /* | |
45 | * Pool configuration repository. | |
46 | * | |
47 | * Pool configuration is stored as a packed nvlist on the filesystem. By | |
48 | * default, all pools are stored in /etc/zfs/zpool.cache and loaded on boot | |
49 | * (when the ZFS module is loaded). Pools can also have the 'cachefile' | |
50 | * property set that allows them to be stored in an alternate location until | |
51 | * the control of external software. | |
52 | * | |
53 | * For each cache file, we have a single nvlist which holds all the | |
54 | * configuration information. When the module loads, we read this information | |
55 | * from /etc/zfs/zpool.cache and populate the SPA namespace. This namespace is | |
56 | * maintained independently in spa.c. Whenever the namespace is modified, or | |
57 | * the configuration of a pool is changed, we call spa_config_sync(), which | |
58 | * walks through all the active pools and writes the configuration to disk. | |
59 | */ | |
60 | ||
61 | static uint64_t spa_config_generation = 1; | |
62 | ||
63 | /* | |
64 | * This can be overridden in userland to preserve an alternate namespace for | |
65 | * userland pools when doing testing. | |
66 | */ | |
c28b2279 | 67 | char *spa_config_path = ZPOOL_CACHE; |
31455ab1 | 68 | int zfs_autoimport_disable = 0; |
34dc7c2f BB |
69 | |
70 | /* | |
71 | * Called when the module is first loaded, this routine loads the configuration | |
72 | * file into the SPA namespace. It does not actually open or load the pools; it | |
73 | * only populates the namespace. | |
74 | */ | |
75 | void | |
76 | spa_config_load(void) | |
77 | { | |
78 | void *buf = NULL; | |
79 | nvlist_t *nvlist, *child; | |
80 | nvpair_t *nvpair; | |
b128c09f | 81 | char *pathname; |
34dc7c2f BB |
82 | struct _buf *file; |
83 | uint64_t fsize; | |
84 | ||
31455ab1 BB |
85 | if (zfs_autoimport_disable) |
86 | return; | |
87 | ||
34dc7c2f BB |
88 | /* |
89 | * Open the configuration file. | |
90 | */ | |
b8d06fca | 91 | pathname = kmem_alloc(MAXPATHLEN, KM_PUSHPAGE); |
b128c09f BB |
92 | |
93 | (void) snprintf(pathname, MAXPATHLEN, "%s%s", | |
94 | (rootdir != NULL) ? "./" : "", spa_config_path); | |
34dc7c2f BB |
95 | |
96 | file = kobj_open_file(pathname); | |
b128c09f BB |
97 | |
98 | kmem_free(pathname, MAXPATHLEN); | |
99 | ||
34dc7c2f BB |
100 | if (file == (struct _buf *)-1) |
101 | return; | |
102 | ||
103 | if (kobj_get_filesize(file, &fsize) != 0) | |
104 | goto out; | |
105 | ||
b8d06fca | 106 | buf = kmem_alloc(fsize, KM_PUSHPAGE | KM_NODEBUG); |
34dc7c2f BB |
107 | |
108 | /* | |
109 | * Read the nvlist from the file. | |
110 | */ | |
111 | if (kobj_read_file(file, buf, fsize, 0) < 0) | |
112 | goto out; | |
113 | ||
114 | /* | |
115 | * Unpack the nvlist. | |
116 | */ | |
b8d06fca | 117 | if (nvlist_unpack(buf, fsize, &nvlist, KM_PUSHPAGE) != 0) |
34dc7c2f BB |
118 | goto out; |
119 | ||
120 | /* | |
121 | * Iterate over all elements in the nvlist, creating a new spa_t for | |
122 | * each one with the specified configuration. | |
123 | */ | |
124 | mutex_enter(&spa_namespace_lock); | |
125 | nvpair = NULL; | |
126 | while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) { | |
34dc7c2f BB |
127 | if (nvpair_type(nvpair) != DATA_TYPE_NVLIST) |
128 | continue; | |
129 | ||
130 | VERIFY(nvpair_value_nvlist(nvpair, &child) == 0); | |
131 | ||
132 | if (spa_lookup(nvpair_name(nvpair)) != NULL) | |
133 | continue; | |
428870ff | 134 | (void) spa_add(nvpair_name(nvpair), child, NULL); |
34dc7c2f BB |
135 | } |
136 | mutex_exit(&spa_namespace_lock); | |
137 | ||
138 | nvlist_free(nvlist); | |
139 | ||
140 | out: | |
141 | if (buf != NULL) | |
142 | kmem_free(buf, fsize); | |
143 | ||
144 | kobj_close_file(file); | |
145 | } | |
146 | ||
34dc7c2f | 147 | static void |
b128c09f | 148 | spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl) |
34dc7c2f | 149 | { |
34dc7c2f BB |
150 | size_t buflen; |
151 | char *buf; | |
152 | vnode_t *vp; | |
153 | int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX; | |
b128c09f BB |
154 | char *temp; |
155 | ||
156 | /* | |
157 | * If the nvlist is empty (NULL), then remove the old cachefile. | |
158 | */ | |
159 | if (nvl == NULL) { | |
160 | (void) vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); | |
161 | return; | |
162 | } | |
34dc7c2f BB |
163 | |
164 | /* | |
165 | * Pack the configuration into a buffer. | |
166 | */ | |
b128c09f | 167 | VERIFY(nvlist_size(nvl, &buflen, NV_ENCODE_XDR) == 0); |
34dc7c2f | 168 | |
b8d06fca RY |
169 | buf = kmem_alloc(buflen, KM_PUSHPAGE | KM_NODEBUG); |
170 | temp = kmem_zalloc(MAXPATHLEN, KM_PUSHPAGE); | |
34dc7c2f | 171 | |
b128c09f | 172 | VERIFY(nvlist_pack(nvl, &buf, &buflen, NV_ENCODE_XDR, |
b8d06fca | 173 | KM_PUSHPAGE) == 0); |
34dc7c2f BB |
174 | |
175 | /* | |
176 | * Write the configuration to disk. We need to do the traditional | |
177 | * 'write to temporary file, sync, move over original' to make sure we | |
178 | * always have a consistent view of the data. | |
179 | */ | |
b128c09f | 180 | (void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path); |
34dc7c2f | 181 | |
b128c09f BB |
182 | if (vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0) == 0) { |
183 | if (vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, | |
184 | 0, RLIM64_INFINITY, kcred, NULL) == 0 && | |
185 | VOP_FSYNC(vp, FSYNC, kcred, NULL) == 0) { | |
186 | (void) vn_rename(temp, dp->scd_path, UIO_SYSSPACE); | |
187 | } | |
188 | (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); | |
34dc7c2f BB |
189 | } |
190 | ||
b128c09f | 191 | (void) vn_remove(temp, UIO_SYSSPACE, RMFILE); |
34dc7c2f | 192 | |
34dc7c2f | 193 | kmem_free(buf, buflen); |
b128c09f | 194 | kmem_free(temp, MAXPATHLEN); |
34dc7c2f BB |
195 | } |
196 | ||
197 | /* | |
b128c09f | 198 | * Synchronize pool configuration to disk. This must be called with the |
5d1f7fb6 GW |
199 | * namespace lock held. Synchronizing the pool cache is typically done after |
200 | * the configuration has been synced to the MOS. This exposes a window where | |
201 | * the MOS config will have been updated but the cache file has not. If | |
202 | * the system were to crash at that instant then the cached config may not | |
203 | * contain the correct information to open the pool and an explicity import | |
204 | * would be required. | |
34dc7c2f BB |
205 | */ |
206 | void | |
b128c09f | 207 | spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent) |
34dc7c2f | 208 | { |
b128c09f BB |
209 | spa_config_dirent_t *dp, *tdp; |
210 | nvlist_t *nvl; | |
34dc7c2f BB |
211 | |
212 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
213 | ||
45d1cae3 | 214 | if (rootdir == NULL || !(spa_mode_global & FWRITE)) |
fb5f0bc8 BB |
215 | return; |
216 | ||
b128c09f BB |
217 | /* |
218 | * Iterate over all cachefiles for the pool, past or present. When the | |
219 | * cachefile is changed, the new one is pushed onto this list, allowing | |
220 | * us to update previous cachefiles that no longer contain this pool. | |
221 | */ | |
222 | for (dp = list_head(&target->spa_config_list); dp != NULL; | |
223 | dp = list_next(&target->spa_config_list, dp)) { | |
224 | spa_t *spa = NULL; | |
225 | if (dp->scd_path == NULL) | |
226 | continue; | |
227 | ||
228 | /* | |
229 | * Iterate over all pools, adding any matching pools to 'nvl'. | |
230 | */ | |
231 | nvl = NULL; | |
232 | while ((spa = spa_next(spa)) != NULL) { | |
c61f97f4 GW |
233 | /* |
234 | * Skip over our own pool if we're about to remove | |
235 | * ourselves from the spa namespace or any pool that | |
236 | * is readonly. Since we cannot guarantee that a | |
237 | * readonly pool would successfully import upon reboot, | |
238 | * we don't allow them to be written to the cache file. | |
239 | */ | |
240 | if ((spa == target && removing) || | |
241 | !spa_writeable(spa)) | |
b128c09f BB |
242 | continue; |
243 | ||
244 | mutex_enter(&spa->spa_props_lock); | |
245 | tdp = list_head(&spa->spa_config_list); | |
246 | if (spa->spa_config == NULL || | |
247 | tdp->scd_path == NULL || | |
248 | strcmp(tdp->scd_path, dp->scd_path) != 0) { | |
249 | mutex_exit(&spa->spa_props_lock); | |
250 | continue; | |
251 | } | |
252 | ||
253 | if (nvl == NULL) | |
254 | VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, | |
b8d06fca | 255 | KM_PUSHPAGE) == 0); |
b128c09f BB |
256 | |
257 | VERIFY(nvlist_add_nvlist(nvl, spa->spa_name, | |
258 | spa->spa_config) == 0); | |
259 | mutex_exit(&spa->spa_props_lock); | |
260 | } | |
261 | ||
262 | spa_config_write(dp, nvl); | |
263 | nvlist_free(nvl); | |
264 | } | |
34dc7c2f BB |
265 | |
266 | /* | |
b128c09f | 267 | * Remove any config entries older than the current one. |
34dc7c2f | 268 | */ |
b128c09f BB |
269 | dp = list_head(&target->spa_config_list); |
270 | while ((tdp = list_next(&target->spa_config_list, dp)) != NULL) { | |
271 | list_remove(&target->spa_config_list, tdp); | |
272 | if (tdp->scd_path != NULL) | |
273 | spa_strfree(tdp->scd_path); | |
274 | kmem_free(tdp, sizeof (spa_config_dirent_t)); | |
34dc7c2f BB |
275 | } |
276 | ||
277 | spa_config_generation++; | |
b128c09f BB |
278 | |
279 | if (postsysevent) | |
26685276 | 280 | spa_event_notify(target, NULL, FM_EREPORT_ZFS_CONFIG_SYNC); |
34dc7c2f BB |
281 | } |
282 | ||
283 | /* | |
284 | * Sigh. Inside a local zone, we don't have access to /etc/zfs/zpool.cache, | |
285 | * and we don't want to allow the local zone to see all the pools anyway. | |
286 | * So we have to invent the ZFS_IOC_CONFIG ioctl to grab the configuration | |
287 | * information for all pool visible within the zone. | |
288 | */ | |
289 | nvlist_t * | |
290 | spa_all_configs(uint64_t *generation) | |
291 | { | |
292 | nvlist_t *pools; | |
b128c09f | 293 | spa_t *spa = NULL; |
34dc7c2f BB |
294 | |
295 | if (*generation == spa_config_generation) | |
296 | return (NULL); | |
297 | ||
b8d06fca | 298 | VERIFY(nvlist_alloc(&pools, NV_UNIQUE_NAME, KM_PUSHPAGE) == 0); |
34dc7c2f | 299 | |
34dc7c2f BB |
300 | mutex_enter(&spa_namespace_lock); |
301 | while ((spa = spa_next(spa)) != NULL) { | |
302 | if (INGLOBALZONE(curproc) || | |
303 | zone_dataset_visible(spa_name(spa), NULL)) { | |
b128c09f | 304 | mutex_enter(&spa->spa_props_lock); |
34dc7c2f BB |
305 | VERIFY(nvlist_add_nvlist(pools, spa_name(spa), |
306 | spa->spa_config) == 0); | |
b128c09f | 307 | mutex_exit(&spa->spa_props_lock); |
34dc7c2f BB |
308 | } |
309 | } | |
34dc7c2f | 310 | *generation = spa_config_generation; |
b128c09f | 311 | mutex_exit(&spa_namespace_lock); |
34dc7c2f BB |
312 | |
313 | return (pools); | |
314 | } | |
315 | ||
316 | void | |
317 | spa_config_set(spa_t *spa, nvlist_t *config) | |
318 | { | |
b128c09f | 319 | mutex_enter(&spa->spa_props_lock); |
34dc7c2f BB |
320 | if (spa->spa_config != NULL) |
321 | nvlist_free(spa->spa_config); | |
322 | spa->spa_config = config; | |
b128c09f | 323 | mutex_exit(&spa->spa_props_lock); |
34dc7c2f BB |
324 | } |
325 | ||
326 | /* | |
327 | * Generate the pool's configuration based on the current in-core state. | |
d3cc8b15 | 328 | * |
34dc7c2f BB |
329 | * We infer whether to generate a complete config or just one top-level config |
330 | * based on whether vd is the root vdev. | |
331 | */ | |
332 | nvlist_t * | |
333 | spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats) | |
334 | { | |
335 | nvlist_t *config, *nvroot; | |
336 | vdev_t *rvd = spa->spa_root_vdev; | |
337 | unsigned long hostid = 0; | |
b128c09f | 338 | boolean_t locked = B_FALSE; |
428870ff | 339 | uint64_t split_guid; |
34dc7c2f | 340 | |
b128c09f | 341 | if (vd == NULL) { |
34dc7c2f | 342 | vd = rvd; |
b128c09f BB |
343 | locked = B_TRUE; |
344 | spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); | |
345 | } | |
346 | ||
347 | ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) == | |
348 | (SCL_CONFIG | SCL_STATE)); | |
34dc7c2f BB |
349 | |
350 | /* | |
351 | * If txg is -1, report the current value of spa->spa_config_txg. | |
352 | */ | |
353 | if (txg == -1ULL) | |
354 | txg = spa->spa_config_txg; | |
355 | ||
b8d06fca | 356 | VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, KM_PUSHPAGE) == 0); |
34dc7c2f BB |
357 | |
358 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, | |
359 | spa_version(spa)) == 0); | |
360 | VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, | |
361 | spa_name(spa)) == 0); | |
362 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
363 | spa_state(spa)) == 0); | |
364 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, | |
365 | txg) == 0); | |
366 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, | |
367 | spa_guid(spa)) == 0); | |
ffe9d382 BB |
368 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_ERRATA, |
369 | spa->spa_errata) == 0); | |
d96eb2b1 DM |
370 | VERIFY(spa->spa_comment == NULL || nvlist_add_string(config, |
371 | ZPOOL_CONFIG_COMMENT, spa->spa_comment) == 0); | |
372 | ||
373 | ||
d164b209 BB |
374 | #ifdef _KERNEL |
375 | hostid = zone_get_hostid(NULL); | |
376 | #else /* _KERNEL */ | |
377 | /* | |
378 | * We're emulating the system's hostid in userland, so we can't use | |
379 | * zone_get_hostid(). | |
380 | */ | |
34dc7c2f | 381 | (void) ddi_strtoul(hw_serial, NULL, 10, &hostid); |
d164b209 | 382 | #endif /* _KERNEL */ |
34dc7c2f BB |
383 | if (hostid != 0) { |
384 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, | |
385 | hostid) == 0); | |
386 | } | |
387 | VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, | |
388 | utsname.nodename) == 0); | |
389 | ||
390 | if (vd != rvd) { | |
391 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID, | |
392 | vd->vdev_top->vdev_guid) == 0); | |
393 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_GUID, | |
394 | vd->vdev_guid) == 0); | |
395 | if (vd->vdev_isspare) | |
396 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_SPARE, | |
397 | 1ULL) == 0); | |
398 | if (vd->vdev_islog) | |
399 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_LOG, | |
400 | 1ULL) == 0); | |
401 | vd = vd->vdev_top; /* label contains top config */ | |
428870ff BB |
402 | } else { |
403 | /* | |
404 | * Only add the (potentially large) split information | |
405 | * in the mos config, and not in the vdev labels | |
406 | */ | |
407 | if (spa->spa_config_splitting != NULL) | |
408 | VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_SPLIT, | |
409 | spa->spa_config_splitting) == 0); | |
34dc7c2f BB |
410 | } |
411 | ||
428870ff BB |
412 | /* |
413 | * Add the top-level config. We even add this on pools which | |
572e2857 | 414 | * don't support holes in the namespace. |
428870ff BB |
415 | */ |
416 | vdev_top_config_generate(spa, config); | |
417 | ||
418 | /* | |
419 | * If we're splitting, record the original pool's guid. | |
420 | */ | |
421 | if (spa->spa_config_splitting != NULL && | |
422 | nvlist_lookup_uint64(spa->spa_config_splitting, | |
423 | ZPOOL_CONFIG_SPLIT_GUID, &split_guid) == 0) { | |
424 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_SPLIT_GUID, | |
425 | split_guid) == 0); | |
426 | } | |
427 | ||
428 | nvroot = vdev_config_generate(spa, vd, getstats, 0); | |
34dc7c2f BB |
429 | VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); |
430 | nvlist_free(nvroot); | |
431 | ||
9ae529ec CS |
432 | /* |
433 | * Store what's necessary for reading the MOS in the label. | |
434 | */ | |
435 | VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, | |
436 | spa->spa_label_features) == 0); | |
437 | ||
428870ff BB |
438 | if (getstats && spa_load_state(spa) == SPA_LOAD_NONE) { |
439 | ddt_histogram_t *ddh; | |
440 | ddt_stat_t *dds; | |
441 | ddt_object_t *ddo; | |
442 | ||
b8d06fca | 443 | ddh = kmem_zalloc(sizeof (ddt_histogram_t), KM_PUSHPAGE); |
428870ff BB |
444 | ddt_get_dedup_histogram(spa, ddh); |
445 | VERIFY(nvlist_add_uint64_array(config, | |
446 | ZPOOL_CONFIG_DDT_HISTOGRAM, | |
447 | (uint64_t *)ddh, sizeof (*ddh) / sizeof (uint64_t)) == 0); | |
448 | kmem_free(ddh, sizeof (ddt_histogram_t)); | |
449 | ||
b8d06fca | 450 | ddo = kmem_zalloc(sizeof (ddt_object_t), KM_PUSHPAGE); |
428870ff BB |
451 | ddt_get_dedup_object_stats(spa, ddo); |
452 | VERIFY(nvlist_add_uint64_array(config, | |
453 | ZPOOL_CONFIG_DDT_OBJ_STATS, | |
454 | (uint64_t *)ddo, sizeof (*ddo) / sizeof (uint64_t)) == 0); | |
455 | kmem_free(ddo, sizeof (ddt_object_t)); | |
456 | ||
b8d06fca | 457 | dds = kmem_zalloc(sizeof (ddt_stat_t), KM_PUSHPAGE); |
428870ff BB |
458 | ddt_get_dedup_stats(spa, dds); |
459 | VERIFY(nvlist_add_uint64_array(config, | |
460 | ZPOOL_CONFIG_DDT_STATS, | |
461 | (uint64_t *)dds, sizeof (*dds) / sizeof (uint64_t)) == 0); | |
462 | kmem_free(dds, sizeof (ddt_stat_t)); | |
463 | } | |
464 | ||
b128c09f BB |
465 | if (locked) |
466 | spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); | |
467 | ||
34dc7c2f BB |
468 | return (config); |
469 | } | |
470 | ||
34dc7c2f BB |
471 | /* |
472 | * Update all disk labels, generate a fresh config based on the current | |
473 | * in-core state, and sync the global config cache (do not sync the config | |
474 | * cache if this is a booting rootpool). | |
475 | */ | |
476 | void | |
45d1cae3 | 477 | spa_config_update(spa_t *spa, int what) |
34dc7c2f BB |
478 | { |
479 | vdev_t *rvd = spa->spa_root_vdev; | |
480 | uint64_t txg; | |
481 | int c; | |
482 | ||
483 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
484 | ||
b128c09f | 485 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); |
34dc7c2f BB |
486 | txg = spa_last_synced_txg(spa) + 1; |
487 | if (what == SPA_CONFIG_UPDATE_POOL) { | |
488 | vdev_config_dirty(rvd); | |
489 | } else { | |
490 | /* | |
491 | * If we have top-level vdevs that were added but have | |
492 | * not yet been prepared for allocation, do that now. | |
493 | * (It's safe now because the config cache is up to date, | |
494 | * so it will be able to translate the new DVAs.) | |
495 | * See comments in spa_vdev_add() for full details. | |
496 | */ | |
497 | for (c = 0; c < rvd->vdev_children; c++) { | |
498 | vdev_t *tvd = rvd->vdev_child[c]; | |
9babb374 BB |
499 | if (tvd->vdev_ms_array == 0) |
500 | vdev_metaslab_set_size(tvd); | |
501 | vdev_expand(tvd, txg); | |
34dc7c2f BB |
502 | } |
503 | } | |
b128c09f | 504 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
505 | |
506 | /* | |
507 | * Wait for the mosconfig to be regenerated and synced. | |
508 | */ | |
509 | txg_wait_synced(spa->spa_dsl_pool, txg); | |
510 | ||
511 | /* | |
512 | * Update the global config cache to reflect the new mosconfig. | |
513 | */ | |
45d1cae3 | 514 | if (!spa->spa_is_root) |
b128c09f | 515 | spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL); |
34dc7c2f BB |
516 | |
517 | if (what == SPA_CONFIG_UPDATE_POOL) | |
45d1cae3 | 518 | spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS); |
34dc7c2f | 519 | } |
c28b2279 BB |
520 | |
521 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
522 | EXPORT_SYMBOL(spa_config_sync); | |
523 | EXPORT_SYMBOL(spa_config_load); | |
524 | EXPORT_SYMBOL(spa_all_configs); | |
525 | EXPORT_SYMBOL(spa_config_set); | |
526 | EXPORT_SYMBOL(spa_config_generate); | |
527 | EXPORT_SYMBOL(spa_config_update); | |
528 | ||
529 | module_param(spa_config_path, charp, 0444); | |
530 | MODULE_PARM_DESC(spa_config_path, "SPA config file (/etc/zfs/zpool.cache)"); | |
31455ab1 BB |
531 | |
532 | module_param(zfs_autoimport_disable, int, 0644); | |
533 | MODULE_PARM_DESC(zfs_autoimport_disable, "Disable pool import at module load"); | |
534 | ||
c28b2279 | 535 | #endif |