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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. |
3541dc6d | 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/zfs_context.h> |
29 | #include <sys/fm/fs/zfs.h> | |
30 | #include <sys/spa.h> | |
31 | #include <sys/spa_impl.h> | |
32 | #include <sys/dmu.h> | |
33 | #include <sys/dmu_tx.h> | |
34 | #include <sys/vdev_impl.h> | |
35 | #include <sys/uberblock_impl.h> | |
36 | #include <sys/metaslab.h> | |
37 | #include <sys/metaslab_impl.h> | |
38 | #include <sys/space_map.h> | |
39 | #include <sys/zio.h> | |
40 | #include <sys/zap.h> | |
41 | #include <sys/fs/zfs.h> | |
b128c09f | 42 | #include <sys/arc.h> |
9babb374 | 43 | #include <sys/zil.h> |
428870ff | 44 | #include <sys/dsl_scan.h> |
6c285672 | 45 | #include <sys/zvol.h> |
34dc7c2f BB |
46 | |
47 | /* | |
48 | * Virtual device management. | |
49 | */ | |
50 | ||
51 | static vdev_ops_t *vdev_ops_table[] = { | |
52 | &vdev_root_ops, | |
53 | &vdev_raidz_ops, | |
54 | &vdev_mirror_ops, | |
55 | &vdev_replacing_ops, | |
56 | &vdev_spare_ops, | |
57 | &vdev_disk_ops, | |
58 | &vdev_file_ops, | |
59 | &vdev_missing_ops, | |
428870ff | 60 | &vdev_hole_ops, |
34dc7c2f BB |
61 | NULL |
62 | }; | |
63 | ||
34dc7c2f BB |
64 | /* |
65 | * Given a vdev type, return the appropriate ops vector. | |
66 | */ | |
67 | static vdev_ops_t * | |
68 | vdev_getops(const char *type) | |
69 | { | |
70 | vdev_ops_t *ops, **opspp; | |
71 | ||
72 | for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) | |
73 | if (strcmp(ops->vdev_op_type, type) == 0) | |
74 | break; | |
75 | ||
76 | return (ops); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Default asize function: return the MAX of psize with the asize of | |
81 | * all children. This is what's used by anything other than RAID-Z. | |
82 | */ | |
83 | uint64_t | |
84 | vdev_default_asize(vdev_t *vd, uint64_t psize) | |
85 | { | |
86 | uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); | |
87 | uint64_t csize; | |
d6320ddb | 88 | int c; |
34dc7c2f | 89 | |
d6320ddb | 90 | for (c = 0; c < vd->vdev_children; c++) { |
34dc7c2f BB |
91 | csize = vdev_psize_to_asize(vd->vdev_child[c], psize); |
92 | asize = MAX(asize, csize); | |
93 | } | |
94 | ||
95 | return (asize); | |
96 | } | |
97 | ||
98 | /* | |
9babb374 BB |
99 | * Get the minimum allocatable size. We define the allocatable size as |
100 | * the vdev's asize rounded to the nearest metaslab. This allows us to | |
101 | * replace or attach devices which don't have the same physical size but | |
102 | * can still satisfy the same number of allocations. | |
34dc7c2f BB |
103 | */ |
104 | uint64_t | |
9babb374 | 105 | vdev_get_min_asize(vdev_t *vd) |
34dc7c2f | 106 | { |
9babb374 | 107 | vdev_t *pvd = vd->vdev_parent; |
34dc7c2f | 108 | |
9babb374 | 109 | /* |
1bd201e7 | 110 | * If our parent is NULL (inactive spare or cache) or is the root, |
9babb374 BB |
111 | * just return our own asize. |
112 | */ | |
113 | if (pvd == NULL) | |
114 | return (vd->vdev_asize); | |
34dc7c2f BB |
115 | |
116 | /* | |
9babb374 BB |
117 | * The top-level vdev just returns the allocatable size rounded |
118 | * to the nearest metaslab. | |
34dc7c2f | 119 | */ |
9babb374 BB |
120 | if (vd == vd->vdev_top) |
121 | return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); | |
34dc7c2f | 122 | |
9babb374 BB |
123 | /* |
124 | * The allocatable space for a raidz vdev is N * sizeof(smallest child), | |
125 | * so each child must provide at least 1/Nth of its asize. | |
126 | */ | |
127 | if (pvd->vdev_ops == &vdev_raidz_ops) | |
128 | return (pvd->vdev_min_asize / pvd->vdev_children); | |
34dc7c2f | 129 | |
9babb374 BB |
130 | return (pvd->vdev_min_asize); |
131 | } | |
132 | ||
133 | void | |
134 | vdev_set_min_asize(vdev_t *vd) | |
135 | { | |
d6320ddb | 136 | int c; |
9babb374 | 137 | vd->vdev_min_asize = vdev_get_min_asize(vd); |
34dc7c2f | 138 | |
d6320ddb | 139 | for (c = 0; c < vd->vdev_children; c++) |
9babb374 | 140 | vdev_set_min_asize(vd->vdev_child[c]); |
34dc7c2f BB |
141 | } |
142 | ||
143 | vdev_t * | |
144 | vdev_lookup_top(spa_t *spa, uint64_t vdev) | |
145 | { | |
146 | vdev_t *rvd = spa->spa_root_vdev; | |
147 | ||
b128c09f | 148 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 149 | |
b128c09f BB |
150 | if (vdev < rvd->vdev_children) { |
151 | ASSERT(rvd->vdev_child[vdev] != NULL); | |
34dc7c2f | 152 | return (rvd->vdev_child[vdev]); |
b128c09f | 153 | } |
34dc7c2f BB |
154 | |
155 | return (NULL); | |
156 | } | |
157 | ||
158 | vdev_t * | |
159 | vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) | |
160 | { | |
34dc7c2f | 161 | vdev_t *mvd; |
d6320ddb | 162 | int c; |
34dc7c2f BB |
163 | |
164 | if (vd->vdev_guid == guid) | |
165 | return (vd); | |
166 | ||
d6320ddb | 167 | for (c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
168 | if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != |
169 | NULL) | |
170 | return (mvd); | |
171 | ||
172 | return (NULL); | |
173 | } | |
174 | ||
175 | void | |
176 | vdev_add_child(vdev_t *pvd, vdev_t *cvd) | |
177 | { | |
178 | size_t oldsize, newsize; | |
179 | uint64_t id = cvd->vdev_id; | |
180 | vdev_t **newchild; | |
181 | ||
b128c09f | 182 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
183 | ASSERT(cvd->vdev_parent == NULL); |
184 | ||
185 | cvd->vdev_parent = pvd; | |
186 | ||
187 | if (pvd == NULL) | |
188 | return; | |
189 | ||
190 | ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); | |
191 | ||
192 | oldsize = pvd->vdev_children * sizeof (vdev_t *); | |
193 | pvd->vdev_children = MAX(pvd->vdev_children, id + 1); | |
194 | newsize = pvd->vdev_children * sizeof (vdev_t *); | |
195 | ||
b8d06fca | 196 | newchild = kmem_zalloc(newsize, KM_PUSHPAGE); |
34dc7c2f BB |
197 | if (pvd->vdev_child != NULL) { |
198 | bcopy(pvd->vdev_child, newchild, oldsize); | |
199 | kmem_free(pvd->vdev_child, oldsize); | |
200 | } | |
201 | ||
202 | pvd->vdev_child = newchild; | |
203 | pvd->vdev_child[id] = cvd; | |
204 | ||
205 | cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); | |
206 | ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); | |
207 | ||
208 | /* | |
209 | * Walk up all ancestors to update guid sum. | |
210 | */ | |
211 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
212 | pvd->vdev_guid_sum += cvd->vdev_guid_sum; | |
34dc7c2f BB |
213 | } |
214 | ||
215 | void | |
216 | vdev_remove_child(vdev_t *pvd, vdev_t *cvd) | |
217 | { | |
218 | int c; | |
219 | uint_t id = cvd->vdev_id; | |
220 | ||
221 | ASSERT(cvd->vdev_parent == pvd); | |
222 | ||
223 | if (pvd == NULL) | |
224 | return; | |
225 | ||
226 | ASSERT(id < pvd->vdev_children); | |
227 | ASSERT(pvd->vdev_child[id] == cvd); | |
228 | ||
229 | pvd->vdev_child[id] = NULL; | |
230 | cvd->vdev_parent = NULL; | |
231 | ||
232 | for (c = 0; c < pvd->vdev_children; c++) | |
233 | if (pvd->vdev_child[c]) | |
234 | break; | |
235 | ||
236 | if (c == pvd->vdev_children) { | |
237 | kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); | |
238 | pvd->vdev_child = NULL; | |
239 | pvd->vdev_children = 0; | |
240 | } | |
241 | ||
242 | /* | |
243 | * Walk up all ancestors to update guid sum. | |
244 | */ | |
245 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
246 | pvd->vdev_guid_sum -= cvd->vdev_guid_sum; | |
34dc7c2f BB |
247 | } |
248 | ||
249 | /* | |
250 | * Remove any holes in the child array. | |
251 | */ | |
252 | void | |
253 | vdev_compact_children(vdev_t *pvd) | |
254 | { | |
255 | vdev_t **newchild, *cvd; | |
256 | int oldc = pvd->vdev_children; | |
9babb374 | 257 | int newc; |
d6320ddb | 258 | int c; |
34dc7c2f | 259 | |
b128c09f | 260 | ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f | 261 | |
d6320ddb | 262 | for (c = newc = 0; c < oldc; c++) |
34dc7c2f BB |
263 | if (pvd->vdev_child[c]) |
264 | newc++; | |
265 | ||
b8d06fca | 266 | newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_PUSHPAGE); |
34dc7c2f | 267 | |
d6320ddb | 268 | for (c = newc = 0; c < oldc; c++) { |
34dc7c2f BB |
269 | if ((cvd = pvd->vdev_child[c]) != NULL) { |
270 | newchild[newc] = cvd; | |
271 | cvd->vdev_id = newc++; | |
272 | } | |
273 | } | |
274 | ||
275 | kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); | |
276 | pvd->vdev_child = newchild; | |
277 | pvd->vdev_children = newc; | |
278 | } | |
279 | ||
280 | /* | |
281 | * Allocate and minimally initialize a vdev_t. | |
282 | */ | |
428870ff | 283 | vdev_t * |
34dc7c2f BB |
284 | vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) |
285 | { | |
286 | vdev_t *vd; | |
d6320ddb | 287 | int t; |
34dc7c2f | 288 | |
b8d06fca | 289 | vd = kmem_zalloc(sizeof (vdev_t), KM_PUSHPAGE); |
34dc7c2f BB |
290 | |
291 | if (spa->spa_root_vdev == NULL) { | |
292 | ASSERT(ops == &vdev_root_ops); | |
293 | spa->spa_root_vdev = vd; | |
3541dc6d | 294 | spa->spa_load_guid = spa_generate_guid(NULL); |
34dc7c2f BB |
295 | } |
296 | ||
428870ff | 297 | if (guid == 0 && ops != &vdev_hole_ops) { |
34dc7c2f BB |
298 | if (spa->spa_root_vdev == vd) { |
299 | /* | |
300 | * The root vdev's guid will also be the pool guid, | |
301 | * which must be unique among all pools. | |
302 | */ | |
428870ff | 303 | guid = spa_generate_guid(NULL); |
34dc7c2f BB |
304 | } else { |
305 | /* | |
306 | * Any other vdev's guid must be unique within the pool. | |
307 | */ | |
428870ff | 308 | guid = spa_generate_guid(spa); |
34dc7c2f BB |
309 | } |
310 | ASSERT(!spa_guid_exists(spa_guid(spa), guid)); | |
311 | } | |
312 | ||
313 | vd->vdev_spa = spa; | |
314 | vd->vdev_id = id; | |
315 | vd->vdev_guid = guid; | |
316 | vd->vdev_guid_sum = guid; | |
317 | vd->vdev_ops = ops; | |
318 | vd->vdev_state = VDEV_STATE_CLOSED; | |
428870ff | 319 | vd->vdev_ishole = (ops == &vdev_hole_ops); |
34dc7c2f | 320 | |
98f72a53 BB |
321 | list_link_init(&vd->vdev_config_dirty_node); |
322 | list_link_init(&vd->vdev_state_dirty_node); | |
34dc7c2f BB |
323 | mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); |
324 | mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); | |
b128c09f | 325 | mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); |
d6320ddb | 326 | for (t = 0; t < DTL_TYPES; t++) { |
fb5f0bc8 BB |
327 | space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, |
328 | &vd->vdev_dtl_lock); | |
329 | } | |
34dc7c2f BB |
330 | txg_list_create(&vd->vdev_ms_list, |
331 | offsetof(struct metaslab, ms_txg_node)); | |
332 | txg_list_create(&vd->vdev_dtl_list, | |
333 | offsetof(struct vdev, vdev_dtl_node)); | |
334 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
335 | vdev_queue_init(vd); | |
336 | vdev_cache_init(vd); | |
337 | ||
338 | return (vd); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
343 | * creating a new vdev or loading an existing one - the behavior is slightly | |
344 | * different for each case. | |
345 | */ | |
346 | int | |
347 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
348 | int alloctype) | |
349 | { | |
350 | vdev_ops_t *ops; | |
351 | char *type; | |
352 | uint64_t guid = 0, islog, nparity; | |
353 | vdev_t *vd; | |
354 | ||
b128c09f | 355 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
356 | |
357 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
a08ee875 | 358 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
359 | |
360 | if ((ops = vdev_getops(type)) == NULL) | |
a08ee875 | 361 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
362 | |
363 | /* | |
364 | * If this is a load, get the vdev guid from the nvlist. | |
365 | * Otherwise, vdev_alloc_common() will generate one for us. | |
366 | */ | |
367 | if (alloctype == VDEV_ALLOC_LOAD) { | |
368 | uint64_t label_id; | |
369 | ||
370 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
371 | label_id != id) | |
a08ee875 | 372 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
373 | |
374 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
a08ee875 | 375 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
376 | } else if (alloctype == VDEV_ALLOC_SPARE) { |
377 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
a08ee875 | 378 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
379 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { |
380 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
a08ee875 | 381 | return (SET_ERROR(EINVAL)); |
9babb374 BB |
382 | } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { |
383 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
a08ee875 | 384 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
385 | } |
386 | ||
387 | /* | |
388 | * The first allocated vdev must be of type 'root'. | |
389 | */ | |
390 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
a08ee875 | 391 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
392 | |
393 | /* | |
394 | * Determine whether we're a log vdev. | |
395 | */ | |
396 | islog = 0; | |
397 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
398 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
a08ee875 | 399 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f | 400 | |
428870ff | 401 | if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) |
a08ee875 | 402 | return (SET_ERROR(ENOTSUP)); |
428870ff | 403 | |
34dc7c2f BB |
404 | /* |
405 | * Set the nparity property for RAID-Z vdevs. | |
406 | */ | |
407 | nparity = -1ULL; | |
408 | if (ops == &vdev_raidz_ops) { | |
409 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
410 | &nparity) == 0) { | |
428870ff | 411 | if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) |
a08ee875 | 412 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 413 | /* |
45d1cae3 BB |
414 | * Previous versions could only support 1 or 2 parity |
415 | * device. | |
34dc7c2f | 416 | */ |
45d1cae3 BB |
417 | if (nparity > 1 && |
418 | spa_version(spa) < SPA_VERSION_RAIDZ2) | |
a08ee875 | 419 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 BB |
420 | if (nparity > 2 && |
421 | spa_version(spa) < SPA_VERSION_RAIDZ3) | |
a08ee875 | 422 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
423 | } else { |
424 | /* | |
425 | * We require the parity to be specified for SPAs that | |
426 | * support multiple parity levels. | |
427 | */ | |
45d1cae3 | 428 | if (spa_version(spa) >= SPA_VERSION_RAIDZ2) |
a08ee875 | 429 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
430 | /* |
431 | * Otherwise, we default to 1 parity device for RAID-Z. | |
432 | */ | |
433 | nparity = 1; | |
434 | } | |
435 | } else { | |
436 | nparity = 0; | |
437 | } | |
438 | ASSERT(nparity != -1ULL); | |
439 | ||
440 | vd = vdev_alloc_common(spa, id, guid, ops); | |
441 | ||
442 | vd->vdev_islog = islog; | |
443 | vd->vdev_nparity = nparity; | |
444 | ||
445 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
446 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
447 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) | |
448 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
449 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
450 | &vd->vdev_physpath) == 0) | |
451 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
9babb374 BB |
452 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) |
453 | vd->vdev_fru = spa_strdup(vd->vdev_fru); | |
34dc7c2f BB |
454 | |
455 | /* | |
456 | * Set the whole_disk property. If it's not specified, leave the value | |
457 | * as -1. | |
458 | */ | |
459 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
460 | &vd->vdev_wholedisk) != 0) | |
461 | vd->vdev_wholedisk = -1ULL; | |
462 | ||
463 | /* | |
464 | * Look for the 'not present' flag. This will only be set if the device | |
465 | * was not present at the time of import. | |
466 | */ | |
9babb374 BB |
467 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, |
468 | &vd->vdev_not_present); | |
34dc7c2f BB |
469 | |
470 | /* | |
471 | * Get the alignment requirement. | |
472 | */ | |
473 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
474 | ||
428870ff BB |
475 | /* |
476 | * Retrieve the vdev creation time. | |
477 | */ | |
478 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, | |
479 | &vd->vdev_crtxg); | |
480 | ||
34dc7c2f BB |
481 | /* |
482 | * If we're a top-level vdev, try to load the allocation parameters. | |
483 | */ | |
428870ff BB |
484 | if (parent && !parent->vdev_parent && |
485 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { | |
34dc7c2f BB |
486 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, |
487 | &vd->vdev_ms_array); | |
488 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
489 | &vd->vdev_ms_shift); | |
490 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
491 | &vd->vdev_asize); | |
428870ff BB |
492 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, |
493 | &vd->vdev_removing); | |
494 | } | |
495 | ||
5ffb9d1d | 496 | if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) { |
428870ff BB |
497 | ASSERT(alloctype == VDEV_ALLOC_LOAD || |
498 | alloctype == VDEV_ALLOC_ADD || | |
499 | alloctype == VDEV_ALLOC_SPLIT || | |
500 | alloctype == VDEV_ALLOC_ROOTPOOL); | |
501 | vd->vdev_mg = metaslab_group_create(islog ? | |
502 | spa_log_class(spa) : spa_normal_class(spa), vd); | |
34dc7c2f BB |
503 | } |
504 | ||
505 | /* | |
506 | * If we're a leaf vdev, try to load the DTL object and other state. | |
507 | */ | |
b128c09f | 508 | if (vd->vdev_ops->vdev_op_leaf && |
9babb374 BB |
509 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || |
510 | alloctype == VDEV_ALLOC_ROOTPOOL)) { | |
b128c09f BB |
511 | if (alloctype == VDEV_ALLOC_LOAD) { |
512 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
fb5f0bc8 | 513 | &vd->vdev_dtl_smo.smo_object); |
b128c09f BB |
514 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, |
515 | &vd->vdev_unspare); | |
516 | } | |
9babb374 BB |
517 | |
518 | if (alloctype == VDEV_ALLOC_ROOTPOOL) { | |
519 | uint64_t spare = 0; | |
520 | ||
521 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, | |
522 | &spare) == 0 && spare) | |
523 | spa_spare_add(vd); | |
524 | } | |
525 | ||
34dc7c2f BB |
526 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, |
527 | &vd->vdev_offline); | |
b128c09f | 528 | |
a08ee875 LG |
529 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVER_TXG, |
530 | &vd->vdev_resilver_txg); | |
572e2857 | 531 | |
34dc7c2f BB |
532 | /* |
533 | * When importing a pool, we want to ignore the persistent fault | |
534 | * state, as the diagnosis made on another system may not be | |
428870ff BB |
535 | * valid in the current context. Local vdevs will |
536 | * remain in the faulted state. | |
34dc7c2f | 537 | */ |
428870ff | 538 | if (spa_load_state(spa) == SPA_LOAD_OPEN) { |
34dc7c2f BB |
539 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, |
540 | &vd->vdev_faulted); | |
541 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
542 | &vd->vdev_degraded); | |
543 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
544 | &vd->vdev_removed); | |
428870ff BB |
545 | |
546 | if (vd->vdev_faulted || vd->vdev_degraded) { | |
547 | char *aux; | |
548 | ||
549 | vd->vdev_label_aux = | |
550 | VDEV_AUX_ERR_EXCEEDED; | |
551 | if (nvlist_lookup_string(nv, | |
552 | ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && | |
553 | strcmp(aux, "external") == 0) | |
554 | vd->vdev_label_aux = VDEV_AUX_EXTERNAL; | |
555 | } | |
34dc7c2f BB |
556 | } |
557 | } | |
558 | ||
559 | /* | |
560 | * Add ourselves to the parent's list of children. | |
561 | */ | |
562 | vdev_add_child(parent, vd); | |
563 | ||
564 | *vdp = vd; | |
565 | ||
566 | return (0); | |
567 | } | |
568 | ||
569 | void | |
570 | vdev_free(vdev_t *vd) | |
571 | { | |
d6320ddb | 572 | int c, t; |
34dc7c2f BB |
573 | spa_t *spa = vd->vdev_spa; |
574 | ||
575 | /* | |
576 | * vdev_free() implies closing the vdev first. This is simpler than | |
577 | * trying to ensure complicated semantics for all callers. | |
578 | */ | |
579 | vdev_close(vd); | |
580 | ||
b128c09f | 581 | ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); |
428870ff | 582 | ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); |
34dc7c2f BB |
583 | |
584 | /* | |
585 | * Free all children. | |
586 | */ | |
d6320ddb | 587 | for (c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
588 | vdev_free(vd->vdev_child[c]); |
589 | ||
590 | ASSERT(vd->vdev_child == NULL); | |
591 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
592 | ||
593 | /* | |
594 | * Discard allocation state. | |
595 | */ | |
428870ff | 596 | if (vd->vdev_mg != NULL) { |
34dc7c2f | 597 | vdev_metaslab_fini(vd); |
428870ff BB |
598 | metaslab_group_destroy(vd->vdev_mg); |
599 | } | |
34dc7c2f | 600 | |
c06d4368 AX |
601 | ASSERT0(vd->vdev_stat.vs_space); |
602 | ASSERT0(vd->vdev_stat.vs_dspace); | |
603 | ASSERT0(vd->vdev_stat.vs_alloc); | |
34dc7c2f BB |
604 | |
605 | /* | |
606 | * Remove this vdev from its parent's child list. | |
607 | */ | |
608 | vdev_remove_child(vd->vdev_parent, vd); | |
609 | ||
610 | ASSERT(vd->vdev_parent == NULL); | |
611 | ||
612 | /* | |
613 | * Clean up vdev structure. | |
614 | */ | |
615 | vdev_queue_fini(vd); | |
616 | vdev_cache_fini(vd); | |
617 | ||
618 | if (vd->vdev_path) | |
619 | spa_strfree(vd->vdev_path); | |
620 | if (vd->vdev_devid) | |
621 | spa_strfree(vd->vdev_devid); | |
622 | if (vd->vdev_physpath) | |
623 | spa_strfree(vd->vdev_physpath); | |
9babb374 BB |
624 | if (vd->vdev_fru) |
625 | spa_strfree(vd->vdev_fru); | |
34dc7c2f BB |
626 | |
627 | if (vd->vdev_isspare) | |
628 | spa_spare_remove(vd); | |
629 | if (vd->vdev_isl2cache) | |
630 | spa_l2cache_remove(vd); | |
631 | ||
632 | txg_list_destroy(&vd->vdev_ms_list); | |
633 | txg_list_destroy(&vd->vdev_dtl_list); | |
fb5f0bc8 | 634 | |
34dc7c2f | 635 | mutex_enter(&vd->vdev_dtl_lock); |
d6320ddb | 636 | for (t = 0; t < DTL_TYPES; t++) { |
fb5f0bc8 BB |
637 | space_map_unload(&vd->vdev_dtl[t]); |
638 | space_map_destroy(&vd->vdev_dtl[t]); | |
639 | } | |
34dc7c2f | 640 | mutex_exit(&vd->vdev_dtl_lock); |
fb5f0bc8 | 641 | |
34dc7c2f BB |
642 | mutex_destroy(&vd->vdev_dtl_lock); |
643 | mutex_destroy(&vd->vdev_stat_lock); | |
b128c09f | 644 | mutex_destroy(&vd->vdev_probe_lock); |
34dc7c2f BB |
645 | |
646 | if (vd == spa->spa_root_vdev) | |
647 | spa->spa_root_vdev = NULL; | |
648 | ||
649 | kmem_free(vd, sizeof (vdev_t)); | |
650 | } | |
651 | ||
652 | /* | |
653 | * Transfer top-level vdev state from svd to tvd. | |
654 | */ | |
655 | static void | |
656 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
657 | { | |
658 | spa_t *spa = svd->vdev_spa; | |
659 | metaslab_t *msp; | |
660 | vdev_t *vd; | |
661 | int t; | |
662 | ||
663 | ASSERT(tvd == tvd->vdev_top); | |
664 | ||
665 | tvd->vdev_ms_array = svd->vdev_ms_array; | |
666 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
667 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
668 | ||
669 | svd->vdev_ms_array = 0; | |
670 | svd->vdev_ms_shift = 0; | |
671 | svd->vdev_ms_count = 0; | |
672 | ||
5ffb9d1d GW |
673 | if (tvd->vdev_mg) |
674 | ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg); | |
34dc7c2f BB |
675 | tvd->vdev_mg = svd->vdev_mg; |
676 | tvd->vdev_ms = svd->vdev_ms; | |
677 | ||
678 | svd->vdev_mg = NULL; | |
679 | svd->vdev_ms = NULL; | |
680 | ||
681 | if (tvd->vdev_mg != NULL) | |
682 | tvd->vdev_mg->mg_vd = tvd; | |
683 | ||
684 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; | |
685 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
686 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
687 | ||
688 | svd->vdev_stat.vs_alloc = 0; | |
689 | svd->vdev_stat.vs_space = 0; | |
690 | svd->vdev_stat.vs_dspace = 0; | |
691 | ||
692 | for (t = 0; t < TXG_SIZE; t++) { | |
693 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
694 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
695 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
696 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
697 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
698 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
699 | } | |
700 | ||
b128c09f | 701 | if (list_link_active(&svd->vdev_config_dirty_node)) { |
34dc7c2f BB |
702 | vdev_config_clean(svd); |
703 | vdev_config_dirty(tvd); | |
704 | } | |
705 | ||
b128c09f BB |
706 | if (list_link_active(&svd->vdev_state_dirty_node)) { |
707 | vdev_state_clean(svd); | |
708 | vdev_state_dirty(tvd); | |
709 | } | |
710 | ||
34dc7c2f BB |
711 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; |
712 | svd->vdev_deflate_ratio = 0; | |
713 | ||
714 | tvd->vdev_islog = svd->vdev_islog; | |
715 | svd->vdev_islog = 0; | |
716 | } | |
717 | ||
718 | static void | |
719 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
720 | { | |
d6320ddb BB |
721 | int c; |
722 | ||
34dc7c2f BB |
723 | if (vd == NULL) |
724 | return; | |
725 | ||
726 | vd->vdev_top = tvd; | |
727 | ||
d6320ddb | 728 | for (c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
729 | vdev_top_update(tvd, vd->vdev_child[c]); |
730 | } | |
731 | ||
732 | /* | |
733 | * Add a mirror/replacing vdev above an existing vdev. | |
734 | */ | |
735 | vdev_t * | |
736 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
737 | { | |
738 | spa_t *spa = cvd->vdev_spa; | |
739 | vdev_t *pvd = cvd->vdev_parent; | |
740 | vdev_t *mvd; | |
741 | ||
b128c09f | 742 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
743 | |
744 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
745 | ||
746 | mvd->vdev_asize = cvd->vdev_asize; | |
9babb374 | 747 | mvd->vdev_min_asize = cvd->vdev_min_asize; |
1bd201e7 | 748 | mvd->vdev_max_asize = cvd->vdev_max_asize; |
34dc7c2f BB |
749 | mvd->vdev_ashift = cvd->vdev_ashift; |
750 | mvd->vdev_state = cvd->vdev_state; | |
428870ff | 751 | mvd->vdev_crtxg = cvd->vdev_crtxg; |
34dc7c2f BB |
752 | |
753 | vdev_remove_child(pvd, cvd); | |
754 | vdev_add_child(pvd, mvd); | |
755 | cvd->vdev_id = mvd->vdev_children; | |
756 | vdev_add_child(mvd, cvd); | |
757 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
758 | ||
759 | if (mvd == mvd->vdev_top) | |
760 | vdev_top_transfer(cvd, mvd); | |
761 | ||
762 | return (mvd); | |
763 | } | |
764 | ||
765 | /* | |
766 | * Remove a 1-way mirror/replacing vdev from the tree. | |
767 | */ | |
768 | void | |
769 | vdev_remove_parent(vdev_t *cvd) | |
770 | { | |
771 | vdev_t *mvd = cvd->vdev_parent; | |
772 | vdev_t *pvd = mvd->vdev_parent; | |
773 | ||
b128c09f | 774 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
775 | |
776 | ASSERT(mvd->vdev_children == 1); | |
777 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
778 | mvd->vdev_ops == &vdev_replacing_ops || | |
779 | mvd->vdev_ops == &vdev_spare_ops); | |
780 | cvd->vdev_ashift = mvd->vdev_ashift; | |
781 | ||
782 | vdev_remove_child(mvd, cvd); | |
783 | vdev_remove_child(pvd, mvd); | |
fb5f0bc8 | 784 | |
34dc7c2f | 785 | /* |
b128c09f BB |
786 | * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. |
787 | * Otherwise, we could have detached an offline device, and when we | |
788 | * go to import the pool we'll think we have two top-level vdevs, | |
789 | * instead of a different version of the same top-level vdev. | |
34dc7c2f | 790 | */ |
fb5f0bc8 BB |
791 | if (mvd->vdev_top == mvd) { |
792 | uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; | |
428870ff | 793 | cvd->vdev_orig_guid = cvd->vdev_guid; |
fb5f0bc8 BB |
794 | cvd->vdev_guid += guid_delta; |
795 | cvd->vdev_guid_sum += guid_delta; | |
796 | } | |
b128c09f BB |
797 | cvd->vdev_id = mvd->vdev_id; |
798 | vdev_add_child(pvd, cvd); | |
34dc7c2f BB |
799 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); |
800 | ||
801 | if (cvd == cvd->vdev_top) | |
802 | vdev_top_transfer(mvd, cvd); | |
803 | ||
804 | ASSERT(mvd->vdev_children == 0); | |
805 | vdev_free(mvd); | |
806 | } | |
807 | ||
808 | int | |
809 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
810 | { | |
811 | spa_t *spa = vd->vdev_spa; | |
812 | objset_t *mos = spa->spa_meta_objset; | |
34dc7c2f BB |
813 | uint64_t m; |
814 | uint64_t oldc = vd->vdev_ms_count; | |
815 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
816 | metaslab_t **mspp; | |
817 | int error; | |
818 | ||
428870ff BB |
819 | ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); |
820 | ||
821 | /* | |
822 | * This vdev is not being allocated from yet or is a hole. | |
823 | */ | |
824 | if (vd->vdev_ms_shift == 0) | |
34dc7c2f BB |
825 | return (0); |
826 | ||
428870ff BB |
827 | ASSERT(!vd->vdev_ishole); |
828 | ||
9babb374 BB |
829 | /* |
830 | * Compute the raidz-deflation ratio. Note, we hard-code | |
831 | * in 128k (1 << 17) because it is the current "typical" blocksize. | |
832 | * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change, | |
833 | * or we will inconsistently account for existing bp's. | |
834 | */ | |
835 | vd->vdev_deflate_ratio = (1 << 17) / | |
836 | (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); | |
837 | ||
34dc7c2f BB |
838 | ASSERT(oldc <= newc); |
839 | ||
b8d06fca | 840 | mspp = kmem_zalloc(newc * sizeof (*mspp), KM_PUSHPAGE | KM_NODEBUG); |
34dc7c2f BB |
841 | |
842 | if (oldc != 0) { | |
843 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
844 | kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); | |
845 | } | |
846 | ||
847 | vd->vdev_ms = mspp; | |
848 | vd->vdev_ms_count = newc; | |
849 | ||
850 | for (m = oldc; m < newc; m++) { | |
851 | space_map_obj_t smo = { 0, 0, 0 }; | |
852 | if (txg == 0) { | |
853 | uint64_t object = 0; | |
854 | error = dmu_read(mos, vd->vdev_ms_array, | |
9babb374 BB |
855 | m * sizeof (uint64_t), sizeof (uint64_t), &object, |
856 | DMU_READ_PREFETCH); | |
34dc7c2f BB |
857 | if (error) |
858 | return (error); | |
859 | if (object != 0) { | |
860 | dmu_buf_t *db; | |
861 | error = dmu_bonus_hold(mos, object, FTAG, &db); | |
862 | if (error) | |
863 | return (error); | |
864 | ASSERT3U(db->db_size, >=, sizeof (smo)); | |
865 | bcopy(db->db_data, &smo, sizeof (smo)); | |
866 | ASSERT3U(smo.smo_object, ==, object); | |
867 | dmu_buf_rele(db, FTAG); | |
868 | } | |
869 | } | |
870 | vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, | |
871 | m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); | |
872 | } | |
873 | ||
428870ff BB |
874 | if (txg == 0) |
875 | spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); | |
876 | ||
877 | /* | |
878 | * If the vdev is being removed we don't activate | |
879 | * the metaslabs since we want to ensure that no new | |
880 | * allocations are performed on this device. | |
881 | */ | |
882 | if (oldc == 0 && !vd->vdev_removing) | |
883 | metaslab_group_activate(vd->vdev_mg); | |
884 | ||
885 | if (txg == 0) | |
886 | spa_config_exit(spa, SCL_ALLOC, FTAG); | |
887 | ||
34dc7c2f BB |
888 | return (0); |
889 | } | |
890 | ||
891 | void | |
892 | vdev_metaslab_fini(vdev_t *vd) | |
893 | { | |
894 | uint64_t m; | |
895 | uint64_t count = vd->vdev_ms_count; | |
896 | ||
897 | if (vd->vdev_ms != NULL) { | |
428870ff | 898 | metaslab_group_passivate(vd->vdev_mg); |
34dc7c2f BB |
899 | for (m = 0; m < count; m++) |
900 | if (vd->vdev_ms[m] != NULL) | |
901 | metaslab_fini(vd->vdev_ms[m]); | |
902 | kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); | |
903 | vd->vdev_ms = NULL; | |
904 | } | |
920dd524 ED |
905 | |
906 | ASSERT3U(vd->vdev_pending_fastwrite, ==, 0); | |
34dc7c2f BB |
907 | } |
908 | ||
b128c09f BB |
909 | typedef struct vdev_probe_stats { |
910 | boolean_t vps_readable; | |
911 | boolean_t vps_writeable; | |
912 | int vps_flags; | |
b128c09f BB |
913 | } vdev_probe_stats_t; |
914 | ||
915 | static void | |
916 | vdev_probe_done(zio_t *zio) | |
34dc7c2f | 917 | { |
fb5f0bc8 | 918 | spa_t *spa = zio->io_spa; |
d164b209 | 919 | vdev_t *vd = zio->io_vd; |
b128c09f | 920 | vdev_probe_stats_t *vps = zio->io_private; |
d164b209 BB |
921 | |
922 | ASSERT(vd->vdev_probe_zio != NULL); | |
b128c09f BB |
923 | |
924 | if (zio->io_type == ZIO_TYPE_READ) { | |
b128c09f BB |
925 | if (zio->io_error == 0) |
926 | vps->vps_readable = 1; | |
fb5f0bc8 | 927 | if (zio->io_error == 0 && spa_writeable(spa)) { |
d164b209 | 928 | zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, |
b128c09f BB |
929 | zio->io_offset, zio->io_size, zio->io_data, |
930 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
931 | ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); | |
932 | } else { | |
933 | zio_buf_free(zio->io_data, zio->io_size); | |
934 | } | |
935 | } else if (zio->io_type == ZIO_TYPE_WRITE) { | |
b128c09f BB |
936 | if (zio->io_error == 0) |
937 | vps->vps_writeable = 1; | |
938 | zio_buf_free(zio->io_data, zio->io_size); | |
939 | } else if (zio->io_type == ZIO_TYPE_NULL) { | |
d164b209 | 940 | zio_t *pio; |
b128c09f BB |
941 | |
942 | vd->vdev_cant_read |= !vps->vps_readable; | |
943 | vd->vdev_cant_write |= !vps->vps_writeable; | |
944 | ||
945 | if (vdev_readable(vd) && | |
fb5f0bc8 | 946 | (vdev_writeable(vd) || !spa_writeable(spa))) { |
b128c09f BB |
947 | zio->io_error = 0; |
948 | } else { | |
949 | ASSERT(zio->io_error != 0); | |
950 | zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, | |
fb5f0bc8 | 951 | spa, vd, NULL, 0, 0); |
a08ee875 | 952 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f | 953 | } |
d164b209 BB |
954 | |
955 | mutex_enter(&vd->vdev_probe_lock); | |
956 | ASSERT(vd->vdev_probe_zio == zio); | |
957 | vd->vdev_probe_zio = NULL; | |
958 | mutex_exit(&vd->vdev_probe_lock); | |
959 | ||
960 | while ((pio = zio_walk_parents(zio)) != NULL) | |
961 | if (!vdev_accessible(vd, pio)) | |
a08ee875 | 962 | pio->io_error = SET_ERROR(ENXIO); |
d164b209 | 963 | |
b128c09f BB |
964 | kmem_free(vps, sizeof (*vps)); |
965 | } | |
966 | } | |
34dc7c2f | 967 | |
b128c09f | 968 | /* |
a08ee875 LG |
969 | * Determine whether this device is accessible. |
970 | * | |
971 | * Read and write to several known locations: the pad regions of each | |
972 | * vdev label but the first, which we leave alone in case it contains | |
973 | * a VTOC. | |
b128c09f BB |
974 | */ |
975 | zio_t * | |
d164b209 | 976 | vdev_probe(vdev_t *vd, zio_t *zio) |
b128c09f BB |
977 | { |
978 | spa_t *spa = vd->vdev_spa; | |
d164b209 BB |
979 | vdev_probe_stats_t *vps = NULL; |
980 | zio_t *pio; | |
d6320ddb | 981 | int l; |
d164b209 BB |
982 | |
983 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
34dc7c2f | 984 | |
d164b209 BB |
985 | /* |
986 | * Don't probe the probe. | |
987 | */ | |
988 | if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) | |
989 | return (NULL); | |
b128c09f | 990 | |
d164b209 BB |
991 | /* |
992 | * To prevent 'probe storms' when a device fails, we create | |
993 | * just one probe i/o at a time. All zios that want to probe | |
994 | * this vdev will become parents of the probe io. | |
995 | */ | |
996 | mutex_enter(&vd->vdev_probe_lock); | |
b128c09f | 997 | |
d164b209 | 998 | if ((pio = vd->vdev_probe_zio) == NULL) { |
b8d06fca | 999 | vps = kmem_zalloc(sizeof (*vps), KM_PUSHPAGE); |
d164b209 BB |
1000 | |
1001 | vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | | |
1002 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | | |
9babb374 | 1003 | ZIO_FLAG_TRYHARD; |
d164b209 BB |
1004 | |
1005 | if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { | |
1006 | /* | |
1007 | * vdev_cant_read and vdev_cant_write can only | |
1008 | * transition from TRUE to FALSE when we have the | |
1009 | * SCL_ZIO lock as writer; otherwise they can only | |
1010 | * transition from FALSE to TRUE. This ensures that | |
1011 | * any zio looking at these values can assume that | |
1012 | * failures persist for the life of the I/O. That's | |
1013 | * important because when a device has intermittent | |
1014 | * connectivity problems, we want to ensure that | |
1015 | * they're ascribed to the device (ENXIO) and not | |
1016 | * the zio (EIO). | |
1017 | * | |
1018 | * Since we hold SCL_ZIO as writer here, clear both | |
1019 | * values so the probe can reevaluate from first | |
1020 | * principles. | |
1021 | */ | |
1022 | vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; | |
1023 | vd->vdev_cant_read = B_FALSE; | |
1024 | vd->vdev_cant_write = B_FALSE; | |
1025 | } | |
1026 | ||
1027 | vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, | |
1028 | vdev_probe_done, vps, | |
1029 | vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); | |
1030 | ||
428870ff BB |
1031 | /* |
1032 | * We can't change the vdev state in this context, so we | |
1033 | * kick off an async task to do it on our behalf. | |
1034 | */ | |
d164b209 BB |
1035 | if (zio != NULL) { |
1036 | vd->vdev_probe_wanted = B_TRUE; | |
1037 | spa_async_request(spa, SPA_ASYNC_PROBE); | |
1038 | } | |
b128c09f BB |
1039 | } |
1040 | ||
d164b209 BB |
1041 | if (zio != NULL) |
1042 | zio_add_child(zio, pio); | |
b128c09f | 1043 | |
d164b209 | 1044 | mutex_exit(&vd->vdev_probe_lock); |
b128c09f | 1045 | |
d164b209 BB |
1046 | if (vps == NULL) { |
1047 | ASSERT(zio != NULL); | |
1048 | return (NULL); | |
1049 | } | |
b128c09f | 1050 | |
d6320ddb | 1051 | for (l = 1; l < VDEV_LABELS; l++) { |
d164b209 | 1052 | zio_nowait(zio_read_phys(pio, vd, |
b128c09f | 1053 | vdev_label_offset(vd->vdev_psize, l, |
9babb374 BB |
1054 | offsetof(vdev_label_t, vl_pad2)), |
1055 | VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), | |
b128c09f BB |
1056 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, |
1057 | ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); | |
1058 | } | |
1059 | ||
d164b209 BB |
1060 | if (zio == NULL) |
1061 | return (pio); | |
1062 | ||
1063 | zio_nowait(pio); | |
1064 | return (NULL); | |
34dc7c2f BB |
1065 | } |
1066 | ||
45d1cae3 BB |
1067 | static void |
1068 | vdev_open_child(void *arg) | |
1069 | { | |
1070 | vdev_t *vd = arg; | |
1071 | ||
1072 | vd->vdev_open_thread = curthread; | |
1073 | vd->vdev_open_error = vdev_open(vd); | |
1074 | vd->vdev_open_thread = NULL; | |
1075 | } | |
1076 | ||
6c285672 | 1077 | static boolean_t |
428870ff BB |
1078 | vdev_uses_zvols(vdev_t *vd) |
1079 | { | |
d6320ddb BB |
1080 | int c; |
1081 | ||
6c285672 JL |
1082 | #ifdef _KERNEL |
1083 | if (zvol_is_zvol(vd->vdev_path)) | |
428870ff | 1084 | return (B_TRUE); |
6c285672 JL |
1085 | #endif |
1086 | ||
d6320ddb | 1087 | for (c = 0; c < vd->vdev_children; c++) |
428870ff BB |
1088 | if (vdev_uses_zvols(vd->vdev_child[c])) |
1089 | return (B_TRUE); | |
6c285672 | 1090 | |
428870ff BB |
1091 | return (B_FALSE); |
1092 | } | |
1093 | ||
45d1cae3 BB |
1094 | void |
1095 | vdev_open_children(vdev_t *vd) | |
1096 | { | |
1097 | taskq_t *tq; | |
1098 | int children = vd->vdev_children; | |
d6320ddb | 1099 | int c; |
45d1cae3 | 1100 | |
428870ff BB |
1101 | /* |
1102 | * in order to handle pools on top of zvols, do the opens | |
1103 | * in a single thread so that the same thread holds the | |
1104 | * spa_namespace_lock | |
1105 | */ | |
1106 | if (vdev_uses_zvols(vd)) { | |
d6320ddb | 1107 | for (c = 0; c < children; c++) |
428870ff BB |
1108 | vd->vdev_child[c]->vdev_open_error = |
1109 | vdev_open(vd->vdev_child[c]); | |
1110 | return; | |
1111 | } | |
45d1cae3 BB |
1112 | tq = taskq_create("vdev_open", children, minclsyspri, |
1113 | children, children, TASKQ_PREPOPULATE); | |
1114 | ||
d6320ddb | 1115 | for (c = 0; c < children; c++) |
45d1cae3 | 1116 | VERIFY(taskq_dispatch(tq, vdev_open_child, vd->vdev_child[c], |
d6320ddb | 1117 | TQ_SLEEP) != 0); |
45d1cae3 BB |
1118 | |
1119 | taskq_destroy(tq); | |
1120 | } | |
1121 | ||
34dc7c2f BB |
1122 | /* |
1123 | * Prepare a virtual device for access. | |
1124 | */ | |
1125 | int | |
1126 | vdev_open(vdev_t *vd) | |
1127 | { | |
fb5f0bc8 | 1128 | spa_t *spa = vd->vdev_spa; |
34dc7c2f | 1129 | int error; |
34dc7c2f | 1130 | uint64_t osize = 0; |
1bd201e7 CS |
1131 | uint64_t max_osize = 0; |
1132 | uint64_t asize, max_asize, psize; | |
34dc7c2f | 1133 | uint64_t ashift = 0; |
d6320ddb | 1134 | int c; |
34dc7c2f | 1135 | |
45d1cae3 BB |
1136 | ASSERT(vd->vdev_open_thread == curthread || |
1137 | spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
1138 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || |
1139 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
1140 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
1141 | ||
34dc7c2f | 1142 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; |
9babb374 BB |
1143 | vd->vdev_cant_read = B_FALSE; |
1144 | vd->vdev_cant_write = B_FALSE; | |
1145 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
34dc7c2f | 1146 | |
428870ff BB |
1147 | /* |
1148 | * If this vdev is not removed, check its fault status. If it's | |
1149 | * faulted, bail out of the open. | |
1150 | */ | |
34dc7c2f BB |
1151 | if (!vd->vdev_removed && vd->vdev_faulted) { |
1152 | ASSERT(vd->vdev_children == 0); | |
428870ff BB |
1153 | ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || |
1154 | vd->vdev_label_aux == VDEV_AUX_EXTERNAL); | |
34dc7c2f | 1155 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, |
428870ff | 1156 | vd->vdev_label_aux); |
a08ee875 | 1157 | return (SET_ERROR(ENXIO)); |
34dc7c2f BB |
1158 | } else if (vd->vdev_offline) { |
1159 | ASSERT(vd->vdev_children == 0); | |
1160 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
a08ee875 | 1161 | return (SET_ERROR(ENXIO)); |
34dc7c2f BB |
1162 | } |
1163 | ||
1bd201e7 | 1164 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize, &ashift); |
34dc7c2f | 1165 | |
428870ff BB |
1166 | /* |
1167 | * Reset the vdev_reopening flag so that we actually close | |
1168 | * the vdev on error. | |
1169 | */ | |
1170 | vd->vdev_reopening = B_FALSE; | |
34dc7c2f | 1171 | if (zio_injection_enabled && error == 0) |
9babb374 | 1172 | error = zio_handle_device_injection(vd, NULL, ENXIO); |
34dc7c2f BB |
1173 | |
1174 | if (error) { | |
1175 | if (vd->vdev_removed && | |
1176 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
1177 | vd->vdev_removed = B_FALSE; | |
1178 | ||
1179 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1180 | vd->vdev_stat.vs_aux); | |
1181 | return (error); | |
1182 | } | |
1183 | ||
1184 | vd->vdev_removed = B_FALSE; | |
1185 | ||
428870ff BB |
1186 | /* |
1187 | * Recheck the faulted flag now that we have confirmed that | |
1188 | * the vdev is accessible. If we're faulted, bail. | |
1189 | */ | |
1190 | if (vd->vdev_faulted) { | |
1191 | ASSERT(vd->vdev_children == 0); | |
1192 | ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || | |
1193 | vd->vdev_label_aux == VDEV_AUX_EXTERNAL); | |
1194 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
1195 | vd->vdev_label_aux); | |
a08ee875 | 1196 | return (SET_ERROR(ENXIO)); |
428870ff BB |
1197 | } |
1198 | ||
34dc7c2f BB |
1199 | if (vd->vdev_degraded) { |
1200 | ASSERT(vd->vdev_children == 0); | |
1201 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1202 | VDEV_AUX_ERR_EXCEEDED); | |
1203 | } else { | |
428870ff | 1204 | vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); |
34dc7c2f BB |
1205 | } |
1206 | ||
428870ff BB |
1207 | /* |
1208 | * For hole or missing vdevs we just return success. | |
1209 | */ | |
1210 | if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) | |
1211 | return (0); | |
1212 | ||
d6320ddb | 1213 | for (c = 0; c < vd->vdev_children; c++) { |
34dc7c2f BB |
1214 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { |
1215 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1216 | VDEV_AUX_NONE); | |
1217 | break; | |
1218 | } | |
9babb374 | 1219 | } |
34dc7c2f BB |
1220 | |
1221 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
1bd201e7 | 1222 | max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t)); |
34dc7c2f BB |
1223 | |
1224 | if (vd->vdev_children == 0) { | |
1225 | if (osize < SPA_MINDEVSIZE) { | |
1226 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1227 | VDEV_AUX_TOO_SMALL); | |
a08ee875 | 1228 | return (SET_ERROR(EOVERFLOW)); |
34dc7c2f BB |
1229 | } |
1230 | psize = osize; | |
1231 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
1bd201e7 CS |
1232 | max_asize = max_osize - (VDEV_LABEL_START_SIZE + |
1233 | VDEV_LABEL_END_SIZE); | |
34dc7c2f BB |
1234 | } else { |
1235 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
1236 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
1237 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1238 | VDEV_AUX_TOO_SMALL); | |
a08ee875 | 1239 | return (SET_ERROR(EOVERFLOW)); |
34dc7c2f BB |
1240 | } |
1241 | psize = 0; | |
1242 | asize = osize; | |
1bd201e7 | 1243 | max_asize = max_osize; |
34dc7c2f BB |
1244 | } |
1245 | ||
1246 | vd->vdev_psize = psize; | |
1247 | ||
9babb374 BB |
1248 | /* |
1249 | * Make sure the allocatable size hasn't shrunk. | |
1250 | */ | |
1251 | if (asize < vd->vdev_min_asize) { | |
1252 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1253 | VDEV_AUX_BAD_LABEL); | |
a08ee875 | 1254 | return (SET_ERROR(EINVAL)); |
9babb374 BB |
1255 | } |
1256 | ||
34dc7c2f BB |
1257 | if (vd->vdev_asize == 0) { |
1258 | /* | |
1259 | * This is the first-ever open, so use the computed values. | |
c06d4368 | 1260 | * For compatibility, a different ashift can be requested. |
34dc7c2f BB |
1261 | */ |
1262 | vd->vdev_asize = asize; | |
1bd201e7 | 1263 | vd->vdev_max_asize = max_asize; |
c06d4368 AX |
1264 | if (vd->vdev_ashift == 0) |
1265 | vd->vdev_ashift = ashift; | |
34dc7c2f BB |
1266 | } else { |
1267 | /* | |
32a9872b GW |
1268 | * Detect if the alignment requirement has increased. |
1269 | * We don't want to make the pool unavailable, just | |
1270 | * post an event instead. | |
34dc7c2f | 1271 | */ |
32a9872b GW |
1272 | if (ashift > vd->vdev_top->vdev_ashift && |
1273 | vd->vdev_ops->vdev_op_leaf) { | |
1274 | zfs_ereport_post(FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT, | |
1275 | spa, vd, NULL, 0, 0); | |
34dc7c2f | 1276 | } |
32a9872b | 1277 | |
1bd201e7 | 1278 | vd->vdev_max_asize = max_asize; |
9babb374 | 1279 | } |
34dc7c2f | 1280 | |
9babb374 BB |
1281 | /* |
1282 | * If all children are healthy and the asize has increased, | |
1283 | * then we've experienced dynamic LUN growth. If automatic | |
1284 | * expansion is enabled then use the additional space. | |
1285 | */ | |
1286 | if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize && | |
1287 | (vd->vdev_expanding || spa->spa_autoexpand)) | |
1288 | vd->vdev_asize = asize; | |
34dc7c2f | 1289 | |
9babb374 | 1290 | vdev_set_min_asize(vd); |
34dc7c2f BB |
1291 | |
1292 | /* | |
1293 | * Ensure we can issue some IO before declaring the | |
1294 | * vdev open for business. | |
1295 | */ | |
b128c09f BB |
1296 | if (vd->vdev_ops->vdev_op_leaf && |
1297 | (error = zio_wait(vdev_probe(vd, NULL))) != 0) { | |
428870ff BB |
1298 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, |
1299 | VDEV_AUX_ERR_EXCEEDED); | |
34dc7c2f BB |
1300 | return (error); |
1301 | } | |
1302 | ||
34dc7c2f | 1303 | /* |
b128c09f | 1304 | * If a leaf vdev has a DTL, and seems healthy, then kick off a |
fb5f0bc8 BB |
1305 | * resilver. But don't do this if we are doing a reopen for a scrub, |
1306 | * since this would just restart the scrub we are already doing. | |
34dc7c2f | 1307 | */ |
fb5f0bc8 BB |
1308 | if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && |
1309 | vdev_resilver_needed(vd, NULL, NULL)) | |
1310 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
34dc7c2f BB |
1311 | |
1312 | return (0); | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * Called once the vdevs are all opened, this routine validates the label | |
1317 | * contents. This needs to be done before vdev_load() so that we don't | |
1318 | * inadvertently do repair I/Os to the wrong device. | |
1319 | * | |
c7f2d69d GW |
1320 | * If 'strict' is false ignore the spa guid check. This is necessary because |
1321 | * if the machine crashed during a re-guid the new guid might have been written | |
1322 | * to all of the vdev labels, but not the cached config. The strict check | |
1323 | * will be performed when the pool is opened again using the mos config. | |
1324 | * | |
34dc7c2f BB |
1325 | * This function will only return failure if one of the vdevs indicates that it |
1326 | * has since been destroyed or exported. This is only possible if | |
1327 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
1328 | * will be updated but the function will return 0. | |
1329 | */ | |
1330 | int | |
c7f2d69d | 1331 | vdev_validate(vdev_t *vd, boolean_t strict) |
34dc7c2f BB |
1332 | { |
1333 | spa_t *spa = vd->vdev_spa; | |
34dc7c2f | 1334 | nvlist_t *label; |
428870ff | 1335 | uint64_t guid = 0, top_guid; |
34dc7c2f | 1336 | uint64_t state; |
d6320ddb | 1337 | int c; |
34dc7c2f | 1338 | |
d6320ddb | 1339 | for (c = 0; c < vd->vdev_children; c++) |
c7f2d69d | 1340 | if (vdev_validate(vd->vdev_child[c], strict) != 0) |
a08ee875 | 1341 | return (SET_ERROR(EBADF)); |
34dc7c2f BB |
1342 | |
1343 | /* | |
1344 | * If the device has already failed, or was marked offline, don't do | |
1345 | * any further validation. Otherwise, label I/O will fail and we will | |
1346 | * overwrite the previous state. | |
1347 | */ | |
b128c09f | 1348 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { |
428870ff BB |
1349 | uint64_t aux_guid = 0; |
1350 | nvlist_t *nvl; | |
c06d4368 AX |
1351 | uint64_t txg = spa_last_synced_txg(spa) != 0 ? |
1352 | spa_last_synced_txg(spa) : -1ULL; | |
34dc7c2f | 1353 | |
3bc7e0fb | 1354 | if ((label = vdev_label_read_config(vd, txg)) == NULL) { |
34dc7c2f BB |
1355 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, |
1356 | VDEV_AUX_BAD_LABEL); | |
1357 | return (0); | |
1358 | } | |
1359 | ||
428870ff BB |
1360 | /* |
1361 | * Determine if this vdev has been split off into another | |
1362 | * pool. If so, then refuse to open it. | |
1363 | */ | |
1364 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, | |
1365 | &aux_guid) == 0 && aux_guid == spa_guid(spa)) { | |
1366 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1367 | VDEV_AUX_SPLIT_POOL); | |
1368 | nvlist_free(label); | |
1369 | return (0); | |
1370 | } | |
1371 | ||
c7f2d69d GW |
1372 | if (strict && (nvlist_lookup_uint64(label, |
1373 | ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || | |
1374 | guid != spa_guid(spa))) { | |
34dc7c2f BB |
1375 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
1376 | VDEV_AUX_CORRUPT_DATA); | |
1377 | nvlist_free(label); | |
1378 | return (0); | |
1379 | } | |
1380 | ||
428870ff BB |
1381 | if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) |
1382 | != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, | |
1383 | &aux_guid) != 0) | |
1384 | aux_guid = 0; | |
1385 | ||
b128c09f BB |
1386 | /* |
1387 | * If this vdev just became a top-level vdev because its | |
1388 | * sibling was detached, it will have adopted the parent's | |
1389 | * vdev guid -- but the label may or may not be on disk yet. | |
1390 | * Fortunately, either version of the label will have the | |
1391 | * same top guid, so if we're a top-level vdev, we can | |
1392 | * safely compare to that instead. | |
428870ff BB |
1393 | * |
1394 | * If we split this vdev off instead, then we also check the | |
1395 | * original pool's guid. We don't want to consider the vdev | |
1396 | * corrupt if it is partway through a split operation. | |
b128c09f | 1397 | */ |
34dc7c2f | 1398 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, |
b128c09f BB |
1399 | &guid) != 0 || |
1400 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, | |
1401 | &top_guid) != 0 || | |
428870ff | 1402 | ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) && |
b128c09f | 1403 | (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { |
34dc7c2f BB |
1404 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
1405 | VDEV_AUX_CORRUPT_DATA); | |
1406 | nvlist_free(label); | |
1407 | return (0); | |
1408 | } | |
1409 | ||
1410 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1411 | &state) != 0) { | |
1412 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1413 | VDEV_AUX_CORRUPT_DATA); | |
1414 | nvlist_free(label); | |
1415 | return (0); | |
1416 | } | |
1417 | ||
1418 | nvlist_free(label); | |
1419 | ||
45d1cae3 | 1420 | /* |
572e2857 | 1421 | * If this is a verbatim import, no need to check the |
45d1cae3 BB |
1422 | * state of the pool. |
1423 | */ | |
572e2857 | 1424 | if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && |
428870ff | 1425 | spa_load_state(spa) == SPA_LOAD_OPEN && |
34dc7c2f | 1426 | state != POOL_STATE_ACTIVE) |
a08ee875 | 1427 | return (SET_ERROR(EBADF)); |
34dc7c2f | 1428 | |
b128c09f BB |
1429 | /* |
1430 | * If we were able to open and validate a vdev that was | |
1431 | * previously marked permanently unavailable, clear that state | |
1432 | * now. | |
1433 | */ | |
1434 | if (vd->vdev_not_present) | |
1435 | vd->vdev_not_present = 0; | |
1436 | } | |
34dc7c2f BB |
1437 | |
1438 | return (0); | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * Close a virtual device. | |
1443 | */ | |
1444 | void | |
1445 | vdev_close(vdev_t *vd) | |
1446 | { | |
428870ff | 1447 | vdev_t *pvd = vd->vdev_parent; |
1fde1e37 | 1448 | ASSERTV(spa_t *spa = vd->vdev_spa); |
fb5f0bc8 BB |
1449 | |
1450 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1451 | ||
428870ff BB |
1452 | /* |
1453 | * If our parent is reopening, then we are as well, unless we are | |
1454 | * going offline. | |
1455 | */ | |
1456 | if (pvd != NULL && pvd->vdev_reopening) | |
1457 | vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); | |
1458 | ||
34dc7c2f BB |
1459 | vd->vdev_ops->vdev_op_close(vd); |
1460 | ||
1461 | vdev_cache_purge(vd); | |
1462 | ||
1463 | /* | |
9babb374 | 1464 | * We record the previous state before we close it, so that if we are |
34dc7c2f BB |
1465 | * doing a reopen(), we don't generate FMA ereports if we notice that |
1466 | * it's still faulted. | |
1467 | */ | |
1468 | vd->vdev_prevstate = vd->vdev_state; | |
1469 | ||
1470 | if (vd->vdev_offline) | |
1471 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
1472 | else | |
1473 | vd->vdev_state = VDEV_STATE_CLOSED; | |
1474 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1475 | } | |
1476 | ||
428870ff BB |
1477 | void |
1478 | vdev_hold(vdev_t *vd) | |
1479 | { | |
1480 | spa_t *spa = vd->vdev_spa; | |
d6320ddb | 1481 | int c; |
428870ff BB |
1482 | |
1483 | ASSERT(spa_is_root(spa)); | |
1484 | if (spa->spa_state == POOL_STATE_UNINITIALIZED) | |
1485 | return; | |
1486 | ||
d6320ddb | 1487 | for (c = 0; c < vd->vdev_children; c++) |
428870ff BB |
1488 | vdev_hold(vd->vdev_child[c]); |
1489 | ||
1490 | if (vd->vdev_ops->vdev_op_leaf) | |
1491 | vd->vdev_ops->vdev_op_hold(vd); | |
1492 | } | |
1493 | ||
1494 | void | |
1495 | vdev_rele(vdev_t *vd) | |
1496 | { | |
d6320ddb | 1497 | int c; |
428870ff | 1498 | |
d6320ddb BB |
1499 | ASSERT(spa_is_root(vd->vdev_spa)); |
1500 | for (c = 0; c < vd->vdev_children; c++) | |
428870ff BB |
1501 | vdev_rele(vd->vdev_child[c]); |
1502 | ||
1503 | if (vd->vdev_ops->vdev_op_leaf) | |
1504 | vd->vdev_ops->vdev_op_rele(vd); | |
1505 | } | |
1506 | ||
1507 | /* | |
1508 | * Reopen all interior vdevs and any unopened leaves. We don't actually | |
1509 | * reopen leaf vdevs which had previously been opened as they might deadlock | |
1510 | * on the spa_config_lock. Instead we only obtain the leaf's physical size. | |
1511 | * If the leaf has never been opened then open it, as usual. | |
1512 | */ | |
34dc7c2f BB |
1513 | void |
1514 | vdev_reopen(vdev_t *vd) | |
1515 | { | |
1516 | spa_t *spa = vd->vdev_spa; | |
1517 | ||
b128c09f | 1518 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
34dc7c2f | 1519 | |
428870ff BB |
1520 | /* set the reopening flag unless we're taking the vdev offline */ |
1521 | vd->vdev_reopening = !vd->vdev_offline; | |
34dc7c2f BB |
1522 | vdev_close(vd); |
1523 | (void) vdev_open(vd); | |
1524 | ||
1525 | /* | |
1526 | * Call vdev_validate() here to make sure we have the same device. | |
1527 | * Otherwise, a device with an invalid label could be successfully | |
1528 | * opened in response to vdev_reopen(). | |
1529 | */ | |
b128c09f BB |
1530 | if (vd->vdev_aux) { |
1531 | (void) vdev_validate_aux(vd); | |
1532 | if (vdev_readable(vd) && vdev_writeable(vd) && | |
9babb374 BB |
1533 | vd->vdev_aux == &spa->spa_l2cache && |
1534 | !l2arc_vdev_present(vd)) | |
1535 | l2arc_add_vdev(spa, vd); | |
b128c09f | 1536 | } else { |
c06d4368 | 1537 | (void) vdev_validate(vd, B_TRUE); |
b128c09f | 1538 | } |
34dc7c2f BB |
1539 | |
1540 | /* | |
1541 | * Reassess parent vdev's health. | |
1542 | */ | |
1543 | vdev_propagate_state(vd); | |
1544 | } | |
1545 | ||
1546 | int | |
1547 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
1548 | { | |
1549 | int error; | |
1550 | ||
1551 | /* | |
1552 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
1553 | * For a create, however, we want to fail the request if | |
1554 | * there are any components we can't open. | |
1555 | */ | |
1556 | error = vdev_open(vd); | |
1557 | ||
1558 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
1559 | vdev_close(vd); | |
1560 | return (error ? error : ENXIO); | |
1561 | } | |
1562 | ||
1563 | /* | |
1564 | * Recursively initialize all labels. | |
1565 | */ | |
1566 | if ((error = vdev_label_init(vd, txg, isreplacing ? | |
1567 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { | |
1568 | vdev_close(vd); | |
1569 | return (error); | |
1570 | } | |
1571 | ||
1572 | return (0); | |
1573 | } | |
1574 | ||
34dc7c2f | 1575 | void |
9babb374 | 1576 | vdev_metaslab_set_size(vdev_t *vd) |
34dc7c2f BB |
1577 | { |
1578 | /* | |
1579 | * Aim for roughly 200 metaslabs per vdev. | |
1580 | */ | |
1581 | vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); | |
1582 | vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); | |
34dc7c2f BB |
1583 | } |
1584 | ||
1585 | void | |
1586 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
1587 | { | |
1588 | ASSERT(vd == vd->vdev_top); | |
428870ff | 1589 | ASSERT(!vd->vdev_ishole); |
34dc7c2f | 1590 | ASSERT(ISP2(flags)); |
572e2857 | 1591 | ASSERT(spa_writeable(vd->vdev_spa)); |
34dc7c2f BB |
1592 | |
1593 | if (flags & VDD_METASLAB) | |
1594 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
1595 | ||
1596 | if (flags & VDD_DTL) | |
1597 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
1598 | ||
1599 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
1600 | } | |
1601 | ||
fb5f0bc8 BB |
1602 | /* |
1603 | * DTLs. | |
1604 | * | |
1605 | * A vdev's DTL (dirty time log) is the set of transaction groups for which | |
428870ff | 1606 | * the vdev has less than perfect replication. There are four kinds of DTL: |
fb5f0bc8 BB |
1607 | * |
1608 | * DTL_MISSING: txgs for which the vdev has no valid copies of the data | |
1609 | * | |
1610 | * DTL_PARTIAL: txgs for which data is available, but not fully replicated | |
1611 | * | |
1612 | * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon | |
1613 | * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of | |
1614 | * txgs that was scrubbed. | |
1615 | * | |
1616 | * DTL_OUTAGE: txgs which cannot currently be read, whether due to | |
1617 | * persistent errors or just some device being offline. | |
1618 | * Unlike the other three, the DTL_OUTAGE map is not generally | |
1619 | * maintained; it's only computed when needed, typically to | |
1620 | * determine whether a device can be detached. | |
1621 | * | |
1622 | * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device | |
1623 | * either has the data or it doesn't. | |
1624 | * | |
1625 | * For interior vdevs such as mirror and RAID-Z the picture is more complex. | |
1626 | * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because | |
1627 | * if any child is less than fully replicated, then so is its parent. | |
1628 | * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, | |
1629 | * comprising only those txgs which appear in 'maxfaults' or more children; | |
1630 | * those are the txgs we don't have enough replication to read. For example, | |
1631 | * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); | |
1632 | * thus, its DTL_MISSING consists of the set of txgs that appear in more than | |
1633 | * two child DTL_MISSING maps. | |
1634 | * | |
1635 | * It should be clear from the above that to compute the DTLs and outage maps | |
1636 | * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. | |
1637 | * Therefore, that is all we keep on disk. When loading the pool, or after | |
1638 | * a configuration change, we generate all other DTLs from first principles. | |
1639 | */ | |
34dc7c2f | 1640 | void |
fb5f0bc8 | 1641 | vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) |
34dc7c2f | 1642 | { |
fb5f0bc8 BB |
1643 | space_map_t *sm = &vd->vdev_dtl[t]; |
1644 | ||
1645 | ASSERT(t < DTL_TYPES); | |
1646 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
572e2857 | 1647 | ASSERT(spa_writeable(vd->vdev_spa)); |
fb5f0bc8 | 1648 | |
34dc7c2f BB |
1649 | mutex_enter(sm->sm_lock); |
1650 | if (!space_map_contains(sm, txg, size)) | |
1651 | space_map_add(sm, txg, size); | |
1652 | mutex_exit(sm->sm_lock); | |
1653 | } | |
1654 | ||
fb5f0bc8 BB |
1655 | boolean_t |
1656 | vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) | |
34dc7c2f | 1657 | { |
fb5f0bc8 BB |
1658 | space_map_t *sm = &vd->vdev_dtl[t]; |
1659 | boolean_t dirty = B_FALSE; | |
34dc7c2f | 1660 | |
fb5f0bc8 BB |
1661 | ASSERT(t < DTL_TYPES); |
1662 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
34dc7c2f BB |
1663 | |
1664 | mutex_enter(sm->sm_lock); | |
fb5f0bc8 BB |
1665 | if (sm->sm_space != 0) |
1666 | dirty = space_map_contains(sm, txg, size); | |
34dc7c2f BB |
1667 | mutex_exit(sm->sm_lock); |
1668 | ||
1669 | return (dirty); | |
1670 | } | |
1671 | ||
fb5f0bc8 BB |
1672 | boolean_t |
1673 | vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) | |
1674 | { | |
1675 | space_map_t *sm = &vd->vdev_dtl[t]; | |
1676 | boolean_t empty; | |
1677 | ||
1678 | mutex_enter(sm->sm_lock); | |
1679 | empty = (sm->sm_space == 0); | |
1680 | mutex_exit(sm->sm_lock); | |
1681 | ||
1682 | return (empty); | |
1683 | } | |
1684 | ||
a08ee875 LG |
1685 | /* |
1686 | * Returns the lowest txg in the DTL range. | |
1687 | */ | |
1688 | static uint64_t | |
1689 | vdev_dtl_min(vdev_t *vd) | |
1690 | { | |
1691 | space_seg_t *ss; | |
1692 | ||
1693 | ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); | |
1694 | ASSERT3U(vd->vdev_dtl[DTL_MISSING].sm_space, !=, 0); | |
1695 | ASSERT0(vd->vdev_children); | |
1696 | ||
1697 | ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); | |
1698 | return (ss->ss_start - 1); | |
1699 | } | |
1700 | ||
1701 | /* | |
1702 | * Returns the highest txg in the DTL. | |
1703 | */ | |
1704 | static uint64_t | |
1705 | vdev_dtl_max(vdev_t *vd) | |
1706 | { | |
1707 | space_seg_t *ss; | |
1708 | ||
1709 | ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); | |
1710 | ASSERT3U(vd->vdev_dtl[DTL_MISSING].sm_space, !=, 0); | |
1711 | ASSERT0(vd->vdev_children); | |
1712 | ||
1713 | ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); | |
1714 | return (ss->ss_end); | |
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * Determine if a resilvering vdev should remove any DTL entries from | |
1719 | * its range. If the vdev was resilvering for the entire duration of the | |
1720 | * scan then it should excise that range from its DTLs. Otherwise, this | |
1721 | * vdev is considered partially resilvered and should leave its DTL | |
1722 | * entries intact. The comment in vdev_dtl_reassess() describes how we | |
1723 | * excise the DTLs. | |
1724 | */ | |
1725 | static boolean_t | |
1726 | vdev_dtl_should_excise(vdev_t *vd) | |
1727 | { | |
1728 | spa_t *spa = vd->vdev_spa; | |
1729 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; | |
1730 | ||
1731 | ASSERT0(scn->scn_phys.scn_errors); | |
1732 | ASSERT0(vd->vdev_children); | |
1733 | ||
1734 | if (vd->vdev_resilver_txg == 0 || | |
1735 | vd->vdev_dtl[DTL_MISSING].sm_space == 0) | |
1736 | return (B_TRUE); | |
1737 | ||
1738 | /* | |
1739 | * When a resilver is initiated the scan will assign the scn_max_txg | |
1740 | * value to the highest txg value that exists in all DTLs. If this | |
1741 | * device's max DTL is not part of this scan (i.e. it is not in | |
1742 | * the range (scn_min_txg, scn_max_txg] then it is not eligible | |
1743 | * for excision. | |
1744 | */ | |
1745 | if (vdev_dtl_max(vd) <= scn->scn_phys.scn_max_txg) { | |
1746 | ASSERT3U(scn->scn_phys.scn_min_txg, <=, vdev_dtl_min(vd)); | |
1747 | ASSERT3U(scn->scn_phys.scn_min_txg, <, vd->vdev_resilver_txg); | |
1748 | ASSERT3U(vd->vdev_resilver_txg, <=, scn->scn_phys.scn_max_txg); | |
1749 | return (B_TRUE); | |
1750 | } | |
1751 | return (B_FALSE); | |
1752 | } | |
1753 | ||
34dc7c2f BB |
1754 | /* |
1755 | * Reassess DTLs after a config change or scrub completion. | |
1756 | */ | |
1757 | void | |
1758 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
1759 | { | |
1760 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 | 1761 | avl_tree_t reftree; |
d6320ddb | 1762 | int c, t, minref; |
34dc7c2f | 1763 | |
fb5f0bc8 | 1764 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 1765 | |
d6320ddb | 1766 | for (c = 0; c < vd->vdev_children; c++) |
fb5f0bc8 BB |
1767 | vdev_dtl_reassess(vd->vdev_child[c], txg, |
1768 | scrub_txg, scrub_done); | |
1769 | ||
428870ff | 1770 | if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux) |
fb5f0bc8 BB |
1771 | return; |
1772 | ||
1773 | if (vd->vdev_ops->vdev_op_leaf) { | |
428870ff BB |
1774 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; |
1775 | ||
34dc7c2f | 1776 | mutex_enter(&vd->vdev_dtl_lock); |
a08ee875 LG |
1777 | |
1778 | /* | |
1779 | * If we've completed a scan cleanly then determine | |
1780 | * if this vdev should remove any DTLs. We only want to | |
1781 | * excise regions on vdevs that were available during | |
1782 | * the entire duration of this scan. | |
1783 | */ | |
b128c09f | 1784 | if (scrub_txg != 0 && |
428870ff | 1785 | (spa->spa_scrub_started || |
a08ee875 LG |
1786 | (scn != NULL && scn->scn_phys.scn_errors == 0)) && |
1787 | vdev_dtl_should_excise(vd)) { | |
b128c09f BB |
1788 | /* |
1789 | * We completed a scrub up to scrub_txg. If we | |
1790 | * did it without rebooting, then the scrub dtl | |
1791 | * will be valid, so excise the old region and | |
1792 | * fold in the scrub dtl. Otherwise, leave the | |
1793 | * dtl as-is if there was an error. | |
fb5f0bc8 BB |
1794 | * |
1795 | * There's little trick here: to excise the beginning | |
1796 | * of the DTL_MISSING map, we put it into a reference | |
1797 | * tree and then add a segment with refcnt -1 that | |
1798 | * covers the range [0, scrub_txg). This means | |
1799 | * that each txg in that range has refcnt -1 or 0. | |
1800 | * We then add DTL_SCRUB with a refcnt of 2, so that | |
1801 | * entries in the range [0, scrub_txg) will have a | |
1802 | * positive refcnt -- either 1 or 2. We then convert | |
1803 | * the reference tree into the new DTL_MISSING map. | |
b128c09f | 1804 | */ |
fb5f0bc8 BB |
1805 | space_map_ref_create(&reftree); |
1806 | space_map_ref_add_map(&reftree, | |
1807 | &vd->vdev_dtl[DTL_MISSING], 1); | |
1808 | space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); | |
1809 | space_map_ref_add_map(&reftree, | |
1810 | &vd->vdev_dtl[DTL_SCRUB], 2); | |
1811 | space_map_ref_generate_map(&reftree, | |
1812 | &vd->vdev_dtl[DTL_MISSING], 1); | |
1813 | space_map_ref_destroy(&reftree); | |
34dc7c2f | 1814 | } |
fb5f0bc8 BB |
1815 | space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); |
1816 | space_map_walk(&vd->vdev_dtl[DTL_MISSING], | |
1817 | space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); | |
34dc7c2f | 1818 | if (scrub_done) |
fb5f0bc8 BB |
1819 | space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); |
1820 | space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); | |
1821 | if (!vdev_readable(vd)) | |
1822 | space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); | |
1823 | else | |
1824 | space_map_walk(&vd->vdev_dtl[DTL_MISSING], | |
1825 | space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); | |
a08ee875 LG |
1826 | |
1827 | /* | |
1828 | * If the vdev was resilvering and no longer has any | |
1829 | * DTLs then reset its resilvering flag. | |
1830 | */ | |
1831 | if (vd->vdev_resilver_txg != 0 && | |
1832 | vd->vdev_dtl[DTL_MISSING].sm_space == 0 && | |
1833 | vd->vdev_dtl[DTL_OUTAGE].sm_space == 0) | |
1834 | vd->vdev_resilver_txg = 0; | |
1835 | ||
34dc7c2f | 1836 | mutex_exit(&vd->vdev_dtl_lock); |
b128c09f | 1837 | |
34dc7c2f BB |
1838 | if (txg != 0) |
1839 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
1840 | return; | |
1841 | } | |
1842 | ||
34dc7c2f | 1843 | mutex_enter(&vd->vdev_dtl_lock); |
d6320ddb | 1844 | for (t = 0; t < DTL_TYPES; t++) { |
428870ff BB |
1845 | /* account for child's outage in parent's missing map */ |
1846 | int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; | |
fb5f0bc8 BB |
1847 | if (t == DTL_SCRUB) |
1848 | continue; /* leaf vdevs only */ | |
1849 | if (t == DTL_PARTIAL) | |
1850 | minref = 1; /* i.e. non-zero */ | |
1851 | else if (vd->vdev_nparity != 0) | |
1852 | minref = vd->vdev_nparity + 1; /* RAID-Z */ | |
1853 | else | |
1854 | minref = vd->vdev_children; /* any kind of mirror */ | |
1855 | space_map_ref_create(&reftree); | |
d6320ddb | 1856 | for (c = 0; c < vd->vdev_children; c++) { |
fb5f0bc8 BB |
1857 | vdev_t *cvd = vd->vdev_child[c]; |
1858 | mutex_enter(&cvd->vdev_dtl_lock); | |
428870ff | 1859 | space_map_ref_add_map(&reftree, &cvd->vdev_dtl[s], 1); |
fb5f0bc8 BB |
1860 | mutex_exit(&cvd->vdev_dtl_lock); |
1861 | } | |
1862 | space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); | |
1863 | space_map_ref_destroy(&reftree); | |
34dc7c2f | 1864 | } |
fb5f0bc8 | 1865 | mutex_exit(&vd->vdev_dtl_lock); |
34dc7c2f BB |
1866 | } |
1867 | ||
1868 | static int | |
1869 | vdev_dtl_load(vdev_t *vd) | |
1870 | { | |
1871 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 | 1872 | space_map_obj_t *smo = &vd->vdev_dtl_smo; |
34dc7c2f BB |
1873 | objset_t *mos = spa->spa_meta_objset; |
1874 | dmu_buf_t *db; | |
1875 | int error; | |
1876 | ||
1877 | ASSERT(vd->vdev_children == 0); | |
1878 | ||
1879 | if (smo->smo_object == 0) | |
1880 | return (0); | |
1881 | ||
428870ff BB |
1882 | ASSERT(!vd->vdev_ishole); |
1883 | ||
34dc7c2f BB |
1884 | if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) |
1885 | return (error); | |
1886 | ||
1887 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1888 | bcopy(db->db_data, smo, sizeof (*smo)); | |
1889 | dmu_buf_rele(db, FTAG); | |
1890 | ||
1891 | mutex_enter(&vd->vdev_dtl_lock); | |
fb5f0bc8 BB |
1892 | error = space_map_load(&vd->vdev_dtl[DTL_MISSING], |
1893 | NULL, SM_ALLOC, smo, mos); | |
34dc7c2f BB |
1894 | mutex_exit(&vd->vdev_dtl_lock); |
1895 | ||
1896 | return (error); | |
1897 | } | |
1898 | ||
1899 | void | |
1900 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
1901 | { | |
1902 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 BB |
1903 | space_map_obj_t *smo = &vd->vdev_dtl_smo; |
1904 | space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; | |
34dc7c2f BB |
1905 | objset_t *mos = spa->spa_meta_objset; |
1906 | space_map_t smsync; | |
1907 | kmutex_t smlock; | |
1908 | dmu_buf_t *db; | |
1909 | dmu_tx_t *tx; | |
1910 | ||
428870ff BB |
1911 | ASSERT(!vd->vdev_ishole); |
1912 | ||
34dc7c2f BB |
1913 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); |
1914 | ||
1915 | if (vd->vdev_detached) { | |
1916 | if (smo->smo_object != 0) { | |
c06d4368 | 1917 | VERIFY0(dmu_object_free(mos, smo->smo_object, tx)); |
34dc7c2f BB |
1918 | smo->smo_object = 0; |
1919 | } | |
1920 | dmu_tx_commit(tx); | |
34dc7c2f BB |
1921 | return; |
1922 | } | |
1923 | ||
1924 | if (smo->smo_object == 0) { | |
1925 | ASSERT(smo->smo_objsize == 0); | |
1926 | ASSERT(smo->smo_alloc == 0); | |
1927 | smo->smo_object = dmu_object_alloc(mos, | |
1928 | DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, | |
1929 | DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); | |
1930 | ASSERT(smo->smo_object != 0); | |
1931 | vdev_config_dirty(vd->vdev_top); | |
1932 | } | |
1933 | ||
1934 | mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); | |
1935 | ||
1936 | space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, | |
1937 | &smlock); | |
1938 | ||
1939 | mutex_enter(&smlock); | |
1940 | ||
1941 | mutex_enter(&vd->vdev_dtl_lock); | |
1942 | space_map_walk(sm, space_map_add, &smsync); | |
1943 | mutex_exit(&vd->vdev_dtl_lock); | |
1944 | ||
1945 | space_map_truncate(smo, mos, tx); | |
1946 | space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); | |
c06d4368 | 1947 | space_map_vacate(&smsync, NULL, NULL); |
34dc7c2f BB |
1948 | |
1949 | space_map_destroy(&smsync); | |
1950 | ||
1951 | mutex_exit(&smlock); | |
1952 | mutex_destroy(&smlock); | |
1953 | ||
1954 | VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); | |
1955 | dmu_buf_will_dirty(db, tx); | |
1956 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1957 | bcopy(smo, db->db_data, sizeof (*smo)); | |
1958 | dmu_buf_rele(db, FTAG); | |
1959 | ||
1960 | dmu_tx_commit(tx); | |
1961 | } | |
1962 | ||
fb5f0bc8 BB |
1963 | /* |
1964 | * Determine whether the specified vdev can be offlined/detached/removed | |
1965 | * without losing data. | |
1966 | */ | |
1967 | boolean_t | |
1968 | vdev_dtl_required(vdev_t *vd) | |
1969 | { | |
1970 | spa_t *spa = vd->vdev_spa; | |
1971 | vdev_t *tvd = vd->vdev_top; | |
1972 | uint8_t cant_read = vd->vdev_cant_read; | |
1973 | boolean_t required; | |
1974 | ||
1975 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1976 | ||
1977 | if (vd == spa->spa_root_vdev || vd == tvd) | |
1978 | return (B_TRUE); | |
1979 | ||
1980 | /* | |
1981 | * Temporarily mark the device as unreadable, and then determine | |
1982 | * whether this results in any DTL outages in the top-level vdev. | |
1983 | * If not, we can safely offline/detach/remove the device. | |
1984 | */ | |
1985 | vd->vdev_cant_read = B_TRUE; | |
1986 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
1987 | required = !vdev_dtl_empty(tvd, DTL_OUTAGE); | |
1988 | vd->vdev_cant_read = cant_read; | |
1989 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
1990 | ||
572e2857 BB |
1991 | if (!required && zio_injection_enabled) |
1992 | required = !!zio_handle_device_injection(vd, NULL, ECHILD); | |
1993 | ||
fb5f0bc8 BB |
1994 | return (required); |
1995 | } | |
1996 | ||
b128c09f BB |
1997 | /* |
1998 | * Determine if resilver is needed, and if so the txg range. | |
1999 | */ | |
2000 | boolean_t | |
2001 | vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) | |
2002 | { | |
2003 | boolean_t needed = B_FALSE; | |
2004 | uint64_t thismin = UINT64_MAX; | |
2005 | uint64_t thismax = 0; | |
d6320ddb | 2006 | int c; |
b128c09f BB |
2007 | |
2008 | if (vd->vdev_children == 0) { | |
2009 | mutex_enter(&vd->vdev_dtl_lock); | |
fb5f0bc8 BB |
2010 | if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && |
2011 | vdev_writeable(vd)) { | |
b128c09f | 2012 | |
a08ee875 LG |
2013 | thismin = vdev_dtl_min(vd); |
2014 | thismax = vdev_dtl_max(vd); | |
b128c09f BB |
2015 | needed = B_TRUE; |
2016 | } | |
2017 | mutex_exit(&vd->vdev_dtl_lock); | |
2018 | } else { | |
d6320ddb | 2019 | for (c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
2020 | vdev_t *cvd = vd->vdev_child[c]; |
2021 | uint64_t cmin, cmax; | |
2022 | ||
2023 | if (vdev_resilver_needed(cvd, &cmin, &cmax)) { | |
2024 | thismin = MIN(thismin, cmin); | |
2025 | thismax = MAX(thismax, cmax); | |
2026 | needed = B_TRUE; | |
2027 | } | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | if (needed && minp) { | |
2032 | *minp = thismin; | |
2033 | *maxp = thismax; | |
2034 | } | |
2035 | return (needed); | |
2036 | } | |
2037 | ||
34dc7c2f BB |
2038 | void |
2039 | vdev_load(vdev_t *vd) | |
2040 | { | |
d6320ddb BB |
2041 | int c; |
2042 | ||
34dc7c2f BB |
2043 | /* |
2044 | * Recursively load all children. | |
2045 | */ | |
d6320ddb | 2046 | for (c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
2047 | vdev_load(vd->vdev_child[c]); |
2048 | ||
2049 | /* | |
2050 | * If this is a top-level vdev, initialize its metaslabs. | |
2051 | */ | |
428870ff | 2052 | if (vd == vd->vdev_top && !vd->vdev_ishole && |
34dc7c2f BB |
2053 | (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || |
2054 | vdev_metaslab_init(vd, 0) != 0)) | |
2055 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2056 | VDEV_AUX_CORRUPT_DATA); | |
2057 | ||
2058 | /* | |
2059 | * If this is a leaf vdev, load its DTL. | |
2060 | */ | |
2061 | if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) | |
2062 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2063 | VDEV_AUX_CORRUPT_DATA); | |
2064 | } | |
2065 | ||
2066 | /* | |
2067 | * The special vdev case is used for hot spares and l2cache devices. Its | |
2068 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
2069 | * we make sure that we can open the underlying device, then try to read the | |
2070 | * label, and make sure that the label is sane and that it hasn't been | |
2071 | * repurposed to another pool. | |
2072 | */ | |
2073 | int | |
2074 | vdev_validate_aux(vdev_t *vd) | |
2075 | { | |
2076 | nvlist_t *label; | |
2077 | uint64_t guid, version; | |
2078 | uint64_t state; | |
2079 | ||
b128c09f BB |
2080 | if (!vdev_readable(vd)) |
2081 | return (0); | |
2082 | ||
3bc7e0fb | 2083 | if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) { |
34dc7c2f BB |
2084 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, |
2085 | VDEV_AUX_CORRUPT_DATA); | |
2086 | return (-1); | |
2087 | } | |
2088 | ||
2089 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
9ae529ec | 2090 | !SPA_VERSION_IS_SUPPORTED(version) || |
34dc7c2f BB |
2091 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || |
2092 | guid != vd->vdev_guid || | |
2093 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
2094 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
2095 | VDEV_AUX_CORRUPT_DATA); | |
2096 | nvlist_free(label); | |
2097 | return (-1); | |
2098 | } | |
2099 | ||
2100 | /* | |
2101 | * We don't actually check the pool state here. If it's in fact in | |
2102 | * use by another pool, we update this fact on the fly when requested. | |
2103 | */ | |
2104 | nvlist_free(label); | |
2105 | return (0); | |
2106 | } | |
2107 | ||
428870ff BB |
2108 | void |
2109 | vdev_remove(vdev_t *vd, uint64_t txg) | |
2110 | { | |
2111 | spa_t *spa = vd->vdev_spa; | |
2112 | objset_t *mos = spa->spa_meta_objset; | |
2113 | dmu_tx_t *tx; | |
d6320ddb | 2114 | int m; |
428870ff BB |
2115 | |
2116 | tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); | |
2117 | ||
2118 | if (vd->vdev_dtl_smo.smo_object) { | |
c06d4368 | 2119 | ASSERT0(vd->vdev_dtl_smo.smo_alloc); |
428870ff BB |
2120 | (void) dmu_object_free(mos, vd->vdev_dtl_smo.smo_object, tx); |
2121 | vd->vdev_dtl_smo.smo_object = 0; | |
2122 | } | |
2123 | ||
2124 | if (vd->vdev_ms != NULL) { | |
d6320ddb | 2125 | for (m = 0; m < vd->vdev_ms_count; m++) { |
428870ff BB |
2126 | metaslab_t *msp = vd->vdev_ms[m]; |
2127 | ||
2128 | if (msp == NULL || msp->ms_smo.smo_object == 0) | |
2129 | continue; | |
2130 | ||
c06d4368 | 2131 | ASSERT0(msp->ms_smo.smo_alloc); |
428870ff BB |
2132 | (void) dmu_object_free(mos, msp->ms_smo.smo_object, tx); |
2133 | msp->ms_smo.smo_object = 0; | |
2134 | } | |
2135 | } | |
2136 | ||
2137 | if (vd->vdev_ms_array) { | |
2138 | (void) dmu_object_free(mos, vd->vdev_ms_array, tx); | |
2139 | vd->vdev_ms_array = 0; | |
2140 | vd->vdev_ms_shift = 0; | |
2141 | } | |
2142 | dmu_tx_commit(tx); | |
2143 | } | |
2144 | ||
34dc7c2f BB |
2145 | void |
2146 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
2147 | { | |
2148 | metaslab_t *msp; | |
428870ff BB |
2149 | boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); |
2150 | ||
2151 | ASSERT(!vd->vdev_ishole); | |
34dc7c2f | 2152 | |
c65aa5b2 | 2153 | while ((msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg)))) |
34dc7c2f | 2154 | metaslab_sync_done(msp, txg); |
428870ff BB |
2155 | |
2156 | if (reassess) | |
2157 | metaslab_sync_reassess(vd->vdev_mg); | |
34dc7c2f BB |
2158 | } |
2159 | ||
2160 | void | |
2161 | vdev_sync(vdev_t *vd, uint64_t txg) | |
2162 | { | |
2163 | spa_t *spa = vd->vdev_spa; | |
2164 | vdev_t *lvd; | |
2165 | metaslab_t *msp; | |
2166 | dmu_tx_t *tx; | |
2167 | ||
428870ff BB |
2168 | ASSERT(!vd->vdev_ishole); |
2169 | ||
34dc7c2f BB |
2170 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { |
2171 | ASSERT(vd == vd->vdev_top); | |
2172 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
2173 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
2174 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
2175 | ASSERT(vd->vdev_ms_array != 0); | |
2176 | vdev_config_dirty(vd); | |
2177 | dmu_tx_commit(tx); | |
2178 | } | |
2179 | ||
428870ff BB |
2180 | /* |
2181 | * Remove the metadata associated with this vdev once it's empty. | |
2182 | */ | |
2183 | if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) | |
2184 | vdev_remove(vd, txg); | |
2185 | ||
34dc7c2f BB |
2186 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { |
2187 | metaslab_sync(msp, txg); | |
2188 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
2189 | } | |
2190 | ||
2191 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
2192 | vdev_dtl_sync(lvd, txg); | |
2193 | ||
2194 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); | |
2195 | } | |
2196 | ||
2197 | uint64_t | |
2198 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
2199 | { | |
2200 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
2201 | } | |
2202 | ||
34dc7c2f BB |
2203 | /* |
2204 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
2205 | * not be opened, and no I/O is attempted. | |
2206 | */ | |
2207 | int | |
428870ff | 2208 | vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) |
34dc7c2f | 2209 | { |
572e2857 | 2210 | vdev_t *vd, *tvd; |
34dc7c2f | 2211 | |
428870ff | 2212 | spa_vdev_state_enter(spa, SCL_NONE); |
34dc7c2f | 2213 | |
b128c09f BB |
2214 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
2215 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 2216 | |
34dc7c2f | 2217 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 2218 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 2219 | |
572e2857 BB |
2220 | tvd = vd->vdev_top; |
2221 | ||
428870ff BB |
2222 | /* |
2223 | * We don't directly use the aux state here, but if we do a | |
2224 | * vdev_reopen(), we need this value to be present to remember why we | |
2225 | * were faulted. | |
2226 | */ | |
2227 | vd->vdev_label_aux = aux; | |
2228 | ||
34dc7c2f BB |
2229 | /* |
2230 | * Faulted state takes precedence over degraded. | |
2231 | */ | |
428870ff | 2232 | vd->vdev_delayed_close = B_FALSE; |
34dc7c2f BB |
2233 | vd->vdev_faulted = 1ULL; |
2234 | vd->vdev_degraded = 0ULL; | |
428870ff | 2235 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); |
34dc7c2f BB |
2236 | |
2237 | /* | |
428870ff BB |
2238 | * If this device has the only valid copy of the data, then |
2239 | * back off and simply mark the vdev as degraded instead. | |
34dc7c2f | 2240 | */ |
572e2857 | 2241 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { |
34dc7c2f BB |
2242 | vd->vdev_degraded = 1ULL; |
2243 | vd->vdev_faulted = 0ULL; | |
2244 | ||
2245 | /* | |
2246 | * If we reopen the device and it's not dead, only then do we | |
2247 | * mark it degraded. | |
2248 | */ | |
572e2857 | 2249 | vdev_reopen(tvd); |
34dc7c2f | 2250 | |
428870ff BB |
2251 | if (vdev_readable(vd)) |
2252 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); | |
34dc7c2f BB |
2253 | } |
2254 | ||
b128c09f | 2255 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
2256 | } |
2257 | ||
2258 | /* | |
2259 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
2260 | * user that something is wrong. The vdev continues to operate as normal as far | |
2261 | * as I/O is concerned. | |
2262 | */ | |
2263 | int | |
428870ff | 2264 | vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) |
34dc7c2f | 2265 | { |
b128c09f | 2266 | vdev_t *vd; |
34dc7c2f | 2267 | |
428870ff | 2268 | spa_vdev_state_enter(spa, SCL_NONE); |
34dc7c2f | 2269 | |
b128c09f BB |
2270 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
2271 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 2272 | |
34dc7c2f | 2273 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 2274 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
2275 | |
2276 | /* | |
2277 | * If the vdev is already faulted, then don't do anything. | |
2278 | */ | |
b128c09f BB |
2279 | if (vd->vdev_faulted || vd->vdev_degraded) |
2280 | return (spa_vdev_state_exit(spa, NULL, 0)); | |
34dc7c2f BB |
2281 | |
2282 | vd->vdev_degraded = 1ULL; | |
2283 | if (!vdev_is_dead(vd)) | |
2284 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
428870ff | 2285 | aux); |
34dc7c2f | 2286 | |
b128c09f | 2287 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
2288 | } |
2289 | ||
2290 | /* | |
a08ee875 LG |
2291 | * Online the given vdev. |
2292 | * | |
2293 | * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached | |
2294 | * spare device should be detached when the device finishes resilvering. | |
2295 | * Second, the online should be treated like a 'test' online case, so no FMA | |
2296 | * events are generated if the device fails to open. | |
34dc7c2f BB |
2297 | */ |
2298 | int | |
b128c09f | 2299 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) |
34dc7c2f | 2300 | { |
9babb374 | 2301 | vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; |
34dc7c2f | 2302 | |
428870ff | 2303 | spa_vdev_state_enter(spa, SCL_NONE); |
34dc7c2f | 2304 | |
b128c09f BB |
2305 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
2306 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
2307 | |
2308 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 2309 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 2310 | |
9babb374 | 2311 | tvd = vd->vdev_top; |
34dc7c2f BB |
2312 | vd->vdev_offline = B_FALSE; |
2313 | vd->vdev_tmpoffline = B_FALSE; | |
b128c09f BB |
2314 | vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); |
2315 | vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); | |
9babb374 BB |
2316 | |
2317 | /* XXX - L2ARC 1.0 does not support expansion */ | |
2318 | if (!vd->vdev_aux) { | |
2319 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
2320 | pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); | |
2321 | } | |
2322 | ||
2323 | vdev_reopen(tvd); | |
34dc7c2f BB |
2324 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; |
2325 | ||
9babb374 BB |
2326 | if (!vd->vdev_aux) { |
2327 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
2328 | pvd->vdev_expanding = B_FALSE; | |
2329 | } | |
2330 | ||
34dc7c2f BB |
2331 | if (newstate) |
2332 | *newstate = vd->vdev_state; | |
2333 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
2334 | !vdev_is_dead(vd) && vd->vdev_parent && | |
2335 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
2336 | vd->vdev_parent->vdev_child[0] == vd) | |
2337 | vd->vdev_unspare = B_TRUE; | |
2338 | ||
9babb374 BB |
2339 | if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { |
2340 | ||
2341 | /* XXX - L2ARC 1.0 does not support expansion */ | |
2342 | if (vd->vdev_aux) | |
2343 | return (spa_vdev_state_exit(spa, vd, ENOTSUP)); | |
2344 | spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); | |
2345 | } | |
fb5f0bc8 | 2346 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
2347 | } |
2348 | ||
428870ff BB |
2349 | static int |
2350 | vdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) | |
34dc7c2f | 2351 | { |
9babb374 | 2352 | vdev_t *vd, *tvd; |
428870ff BB |
2353 | int error = 0; |
2354 | uint64_t generation; | |
2355 | metaslab_group_t *mg; | |
34dc7c2f | 2356 | |
428870ff BB |
2357 | top: |
2358 | spa_vdev_state_enter(spa, SCL_ALLOC); | |
34dc7c2f | 2359 | |
b128c09f BB |
2360 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
2361 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
2362 | |
2363 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 2364 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 2365 | |
9babb374 | 2366 | tvd = vd->vdev_top; |
428870ff BB |
2367 | mg = tvd->vdev_mg; |
2368 | generation = spa->spa_config_generation + 1; | |
9babb374 | 2369 | |
34dc7c2f BB |
2370 | /* |
2371 | * If the device isn't already offline, try to offline it. | |
2372 | */ | |
2373 | if (!vd->vdev_offline) { | |
2374 | /* | |
fb5f0bc8 | 2375 | * If this device has the only valid copy of some data, |
9babb374 BB |
2376 | * don't allow it to be offlined. Log devices are always |
2377 | * expendable. | |
34dc7c2f | 2378 | */ |
9babb374 BB |
2379 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && |
2380 | vdev_dtl_required(vd)) | |
b128c09f | 2381 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f | 2382 | |
428870ff BB |
2383 | /* |
2384 | * If the top-level is a slog and it has had allocations | |
2385 | * then proceed. We check that the vdev's metaslab group | |
2386 | * is not NULL since it's possible that we may have just | |
2387 | * added this vdev but not yet initialized its metaslabs. | |
2388 | */ | |
2389 | if (tvd->vdev_islog && mg != NULL) { | |
2390 | /* | |
2391 | * Prevent any future allocations. | |
2392 | */ | |
2393 | metaslab_group_passivate(mg); | |
2394 | (void) spa_vdev_state_exit(spa, vd, 0); | |
2395 | ||
2396 | error = spa_offline_log(spa); | |
2397 | ||
2398 | spa_vdev_state_enter(spa, SCL_ALLOC); | |
2399 | ||
2400 | /* | |
2401 | * Check to see if the config has changed. | |
2402 | */ | |
2403 | if (error || generation != spa->spa_config_generation) { | |
2404 | metaslab_group_activate(mg); | |
2405 | if (error) | |
2406 | return (spa_vdev_state_exit(spa, | |
2407 | vd, error)); | |
2408 | (void) spa_vdev_state_exit(spa, vd, 0); | |
2409 | goto top; | |
2410 | } | |
c06d4368 | 2411 | ASSERT0(tvd->vdev_stat.vs_alloc); |
428870ff BB |
2412 | } |
2413 | ||
34dc7c2f BB |
2414 | /* |
2415 | * Offline this device and reopen its top-level vdev. | |
9babb374 BB |
2416 | * If the top-level vdev is a log device then just offline |
2417 | * it. Otherwise, if this action results in the top-level | |
2418 | * vdev becoming unusable, undo it and fail the request. | |
34dc7c2f BB |
2419 | */ |
2420 | vd->vdev_offline = B_TRUE; | |
9babb374 BB |
2421 | vdev_reopen(tvd); |
2422 | ||
2423 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && | |
2424 | vdev_is_dead(tvd)) { | |
34dc7c2f | 2425 | vd->vdev_offline = B_FALSE; |
9babb374 | 2426 | vdev_reopen(tvd); |
b128c09f | 2427 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f | 2428 | } |
428870ff BB |
2429 | |
2430 | /* | |
2431 | * Add the device back into the metaslab rotor so that | |
2432 | * once we online the device it's open for business. | |
2433 | */ | |
2434 | if (tvd->vdev_islog && mg != NULL) | |
2435 | metaslab_group_activate(mg); | |
34dc7c2f BB |
2436 | } |
2437 | ||
b128c09f | 2438 | vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); |
34dc7c2f | 2439 | |
428870ff BB |
2440 | return (spa_vdev_state_exit(spa, vd, 0)); |
2441 | } | |
9babb374 | 2442 | |
428870ff BB |
2443 | int |
2444 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
2445 | { | |
2446 | int error; | |
9babb374 | 2447 | |
428870ff BB |
2448 | mutex_enter(&spa->spa_vdev_top_lock); |
2449 | error = vdev_offline_locked(spa, guid, flags); | |
2450 | mutex_exit(&spa->spa_vdev_top_lock); | |
2451 | ||
2452 | return (error); | |
34dc7c2f BB |
2453 | } |
2454 | ||
2455 | /* | |
2456 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
2457 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
2458 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
34dc7c2f BB |
2459 | */ |
2460 | void | |
b128c09f | 2461 | vdev_clear(spa_t *spa, vdev_t *vd) |
34dc7c2f | 2462 | { |
b128c09f | 2463 | vdev_t *rvd = spa->spa_root_vdev; |
d6320ddb | 2464 | int c; |
b128c09f BB |
2465 | |
2466 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
2467 | |
2468 | if (vd == NULL) | |
b128c09f | 2469 | vd = rvd; |
34dc7c2f BB |
2470 | |
2471 | vd->vdev_stat.vs_read_errors = 0; | |
2472 | vd->vdev_stat.vs_write_errors = 0; | |
2473 | vd->vdev_stat.vs_checksum_errors = 0; | |
34dc7c2f | 2474 | |
d6320ddb | 2475 | for (c = 0; c < vd->vdev_children; c++) |
b128c09f | 2476 | vdev_clear(spa, vd->vdev_child[c]); |
34dc7c2f BB |
2477 | |
2478 | /* | |
b128c09f BB |
2479 | * If we're in the FAULTED state or have experienced failed I/O, then |
2480 | * clear the persistent state and attempt to reopen the device. We | |
2481 | * also mark the vdev config dirty, so that the new faulted state is | |
2482 | * written out to disk. | |
34dc7c2f | 2483 | */ |
b128c09f BB |
2484 | if (vd->vdev_faulted || vd->vdev_degraded || |
2485 | !vdev_readable(vd) || !vdev_writeable(vd)) { | |
2486 | ||
428870ff BB |
2487 | /* |
2488 | * When reopening in reponse to a clear event, it may be due to | |
2489 | * a fmadm repair request. In this case, if the device is | |
2490 | * still broken, we want to still post the ereport again. | |
2491 | */ | |
2492 | vd->vdev_forcefault = B_TRUE; | |
2493 | ||
572e2857 | 2494 | vd->vdev_faulted = vd->vdev_degraded = 0ULL; |
b128c09f BB |
2495 | vd->vdev_cant_read = B_FALSE; |
2496 | vd->vdev_cant_write = B_FALSE; | |
2497 | ||
572e2857 | 2498 | vdev_reopen(vd == rvd ? rvd : vd->vdev_top); |
34dc7c2f | 2499 | |
428870ff BB |
2500 | vd->vdev_forcefault = B_FALSE; |
2501 | ||
572e2857 | 2502 | if (vd != rvd && vdev_writeable(vd->vdev_top)) |
b128c09f BB |
2503 | vdev_state_dirty(vd->vdev_top); |
2504 | ||
2505 | if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) | |
34dc7c2f BB |
2506 | spa_async_request(spa, SPA_ASYNC_RESILVER); |
2507 | ||
26685276 | 2508 | spa_event_notify(spa, vd, FM_EREPORT_ZFS_DEVICE_CLEAR); |
34dc7c2f | 2509 | } |
428870ff BB |
2510 | |
2511 | /* | |
2512 | * When clearing a FMA-diagnosed fault, we always want to | |
2513 | * unspare the device, as we assume that the original spare was | |
2514 | * done in response to the FMA fault. | |
2515 | */ | |
2516 | if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && | |
2517 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
2518 | vd->vdev_parent->vdev_child[0] == vd) | |
2519 | vd->vdev_unspare = B_TRUE; | |
34dc7c2f BB |
2520 | } |
2521 | ||
b128c09f BB |
2522 | boolean_t |
2523 | vdev_is_dead(vdev_t *vd) | |
2524 | { | |
428870ff BB |
2525 | /* |
2526 | * Holes and missing devices are always considered "dead". | |
2527 | * This simplifies the code since we don't have to check for | |
2528 | * these types of devices in the various code paths. | |
2529 | * Instead we rely on the fact that we skip over dead devices | |
2530 | * before issuing I/O to them. | |
2531 | */ | |
2532 | return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole || | |
2533 | vd->vdev_ops == &vdev_missing_ops); | |
b128c09f BB |
2534 | } |
2535 | ||
2536 | boolean_t | |
34dc7c2f BB |
2537 | vdev_readable(vdev_t *vd) |
2538 | { | |
b128c09f | 2539 | return (!vdev_is_dead(vd) && !vd->vdev_cant_read); |
34dc7c2f BB |
2540 | } |
2541 | ||
b128c09f | 2542 | boolean_t |
34dc7c2f BB |
2543 | vdev_writeable(vdev_t *vd) |
2544 | { | |
b128c09f | 2545 | return (!vdev_is_dead(vd) && !vd->vdev_cant_write); |
34dc7c2f BB |
2546 | } |
2547 | ||
b128c09f BB |
2548 | boolean_t |
2549 | vdev_allocatable(vdev_t *vd) | |
34dc7c2f | 2550 | { |
fb5f0bc8 BB |
2551 | uint64_t state = vd->vdev_state; |
2552 | ||
b128c09f | 2553 | /* |
fb5f0bc8 | 2554 | * We currently allow allocations from vdevs which may be in the |
b128c09f BB |
2555 | * process of reopening (i.e. VDEV_STATE_CLOSED). If the device |
2556 | * fails to reopen then we'll catch it later when we're holding | |
fb5f0bc8 BB |
2557 | * the proper locks. Note that we have to get the vdev state |
2558 | * in a local variable because although it changes atomically, | |
2559 | * we're asking two separate questions about it. | |
b128c09f | 2560 | */ |
fb5f0bc8 | 2561 | return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && |
428870ff | 2562 | !vd->vdev_cant_write && !vd->vdev_ishole); |
34dc7c2f BB |
2563 | } |
2564 | ||
b128c09f BB |
2565 | boolean_t |
2566 | vdev_accessible(vdev_t *vd, zio_t *zio) | |
34dc7c2f | 2567 | { |
b128c09f | 2568 | ASSERT(zio->io_vd == vd); |
34dc7c2f | 2569 | |
b128c09f BB |
2570 | if (vdev_is_dead(vd) || vd->vdev_remove_wanted) |
2571 | return (B_FALSE); | |
34dc7c2f | 2572 | |
b128c09f BB |
2573 | if (zio->io_type == ZIO_TYPE_READ) |
2574 | return (!vd->vdev_cant_read); | |
34dc7c2f | 2575 | |
b128c09f BB |
2576 | if (zio->io_type == ZIO_TYPE_WRITE) |
2577 | return (!vd->vdev_cant_write); | |
34dc7c2f | 2578 | |
b128c09f | 2579 | return (B_TRUE); |
34dc7c2f BB |
2580 | } |
2581 | ||
2582 | /* | |
2583 | * Get statistics for the given vdev. | |
2584 | */ | |
2585 | void | |
2586 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
2587 | { | |
2588 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
d6320ddb | 2589 | int c, t; |
34dc7c2f BB |
2590 | |
2591 | mutex_enter(&vd->vdev_stat_lock); | |
2592 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
2593 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; | |
2594 | vs->vs_state = vd->vdev_state; | |
9babb374 BB |
2595 | vs->vs_rsize = vdev_get_min_asize(vd); |
2596 | if (vd->vdev_ops->vdev_op_leaf) | |
2597 | vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; | |
1bd201e7 | 2598 | vs->vs_esize = vd->vdev_max_asize - vd->vdev_asize; |
34dc7c2f BB |
2599 | mutex_exit(&vd->vdev_stat_lock); |
2600 | ||
2601 | /* | |
2602 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
2603 | * over all top-level vdevs (i.e. the direct children of the root). | |
2604 | */ | |
2605 | if (vd == rvd) { | |
d6320ddb | 2606 | for (c = 0; c < rvd->vdev_children; c++) { |
34dc7c2f BB |
2607 | vdev_t *cvd = rvd->vdev_child[c]; |
2608 | vdev_stat_t *cvs = &cvd->vdev_stat; | |
2609 | ||
2610 | mutex_enter(&vd->vdev_stat_lock); | |
d6320ddb | 2611 | for (t = 0; t < ZIO_TYPES; t++) { |
34dc7c2f BB |
2612 | vs->vs_ops[t] += cvs->vs_ops[t]; |
2613 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
2614 | } | |
428870ff | 2615 | cvs->vs_scan_removing = cvd->vdev_removing; |
34dc7c2f BB |
2616 | mutex_exit(&vd->vdev_stat_lock); |
2617 | } | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | void | |
2622 | vdev_clear_stats(vdev_t *vd) | |
2623 | { | |
2624 | mutex_enter(&vd->vdev_stat_lock); | |
2625 | vd->vdev_stat.vs_space = 0; | |
2626 | vd->vdev_stat.vs_dspace = 0; | |
2627 | vd->vdev_stat.vs_alloc = 0; | |
2628 | mutex_exit(&vd->vdev_stat_lock); | |
2629 | } | |
2630 | ||
428870ff BB |
2631 | void |
2632 | vdev_scan_stat_init(vdev_t *vd) | |
2633 | { | |
2634 | vdev_stat_t *vs = &vd->vdev_stat; | |
d6320ddb | 2635 | int c; |
428870ff | 2636 | |
d6320ddb | 2637 | for (c = 0; c < vd->vdev_children; c++) |
428870ff BB |
2638 | vdev_scan_stat_init(vd->vdev_child[c]); |
2639 | ||
2640 | mutex_enter(&vd->vdev_stat_lock); | |
2641 | vs->vs_scan_processed = 0; | |
2642 | mutex_exit(&vd->vdev_stat_lock); | |
2643 | } | |
2644 | ||
34dc7c2f | 2645 | void |
b128c09f | 2646 | vdev_stat_update(zio_t *zio, uint64_t psize) |
34dc7c2f | 2647 | { |
fb5f0bc8 BB |
2648 | spa_t *spa = zio->io_spa; |
2649 | vdev_t *rvd = spa->spa_root_vdev; | |
b128c09f | 2650 | vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; |
34dc7c2f BB |
2651 | vdev_t *pvd; |
2652 | uint64_t txg = zio->io_txg; | |
2653 | vdev_stat_t *vs = &vd->vdev_stat; | |
2654 | zio_type_t type = zio->io_type; | |
2655 | int flags = zio->io_flags; | |
2656 | ||
b128c09f BB |
2657 | /* |
2658 | * If this i/o is a gang leader, it didn't do any actual work. | |
2659 | */ | |
2660 | if (zio->io_gang_tree) | |
2661 | return; | |
2662 | ||
34dc7c2f | 2663 | if (zio->io_error == 0) { |
b128c09f BB |
2664 | /* |
2665 | * If this is a root i/o, don't count it -- we've already | |
2666 | * counted the top-level vdevs, and vdev_get_stats() will | |
2667 | * aggregate them when asked. This reduces contention on | |
2668 | * the root vdev_stat_lock and implicitly handles blocks | |
2669 | * that compress away to holes, for which there is no i/o. | |
2670 | * (Holes never create vdev children, so all the counters | |
2671 | * remain zero, which is what we want.) | |
2672 | * | |
2673 | * Note: this only applies to successful i/o (io_error == 0) | |
2674 | * because unlike i/o counts, errors are not additive. | |
2675 | * When reading a ditto block, for example, failure of | |
2676 | * one top-level vdev does not imply a root-level error. | |
2677 | */ | |
2678 | if (vd == rvd) | |
2679 | return; | |
2680 | ||
2681 | ASSERT(vd == zio->io_vd); | |
fb5f0bc8 BB |
2682 | |
2683 | if (flags & ZIO_FLAG_IO_BYPASS) | |
2684 | return; | |
2685 | ||
2686 | mutex_enter(&vd->vdev_stat_lock); | |
2687 | ||
b128c09f | 2688 | if (flags & ZIO_FLAG_IO_REPAIR) { |
572e2857 | 2689 | if (flags & ZIO_FLAG_SCAN_THREAD) { |
428870ff BB |
2690 | dsl_scan_phys_t *scn_phys = |
2691 | &spa->spa_dsl_pool->dp_scan->scn_phys; | |
2692 | uint64_t *processed = &scn_phys->scn_processed; | |
2693 | ||
2694 | /* XXX cleanup? */ | |
2695 | if (vd->vdev_ops->vdev_op_leaf) | |
2696 | atomic_add_64(processed, psize); | |
2697 | vs->vs_scan_processed += psize; | |
2698 | } | |
2699 | ||
fb5f0bc8 | 2700 | if (flags & ZIO_FLAG_SELF_HEAL) |
b128c09f | 2701 | vs->vs_self_healed += psize; |
34dc7c2f | 2702 | } |
fb5f0bc8 BB |
2703 | |
2704 | vs->vs_ops[type]++; | |
2705 | vs->vs_bytes[type] += psize; | |
2706 | ||
2707 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f BB |
2708 | return; |
2709 | } | |
2710 | ||
2711 | if (flags & ZIO_FLAG_SPECULATIVE) | |
2712 | return; | |
2713 | ||
9babb374 BB |
2714 | /* |
2715 | * If this is an I/O error that is going to be retried, then ignore the | |
2716 | * error. Otherwise, the user may interpret B_FAILFAST I/O errors as | |
2717 | * hard errors, when in reality they can happen for any number of | |
2718 | * innocuous reasons (bus resets, MPxIO link failure, etc). | |
2719 | */ | |
2720 | if (zio->io_error == EIO && | |
2721 | !(zio->io_flags & ZIO_FLAG_IO_RETRY)) | |
2722 | return; | |
2723 | ||
428870ff BB |
2724 | /* |
2725 | * Intent logs writes won't propagate their error to the root | |
2726 | * I/O so don't mark these types of failures as pool-level | |
2727 | * errors. | |
2728 | */ | |
2729 | if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) | |
2730 | return; | |
2731 | ||
b128c09f | 2732 | mutex_enter(&vd->vdev_stat_lock); |
9babb374 | 2733 | if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { |
b128c09f BB |
2734 | if (zio->io_error == ECKSUM) |
2735 | vs->vs_checksum_errors++; | |
2736 | else | |
2737 | vs->vs_read_errors++; | |
34dc7c2f | 2738 | } |
9babb374 | 2739 | if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) |
b128c09f BB |
2740 | vs->vs_write_errors++; |
2741 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f | 2742 | |
fb5f0bc8 BB |
2743 | if (type == ZIO_TYPE_WRITE && txg != 0 && |
2744 | (!(flags & ZIO_FLAG_IO_REPAIR) || | |
572e2857 | 2745 | (flags & ZIO_FLAG_SCAN_THREAD) || |
428870ff | 2746 | spa->spa_claiming)) { |
fb5f0bc8 | 2747 | /* |
428870ff BB |
2748 | * This is either a normal write (not a repair), or it's |
2749 | * a repair induced by the scrub thread, or it's a repair | |
2750 | * made by zil_claim() during spa_load() in the first txg. | |
2751 | * In the normal case, we commit the DTL change in the same | |
2752 | * txg as the block was born. In the scrub-induced repair | |
2753 | * case, we know that scrubs run in first-pass syncing context, | |
2754 | * so we commit the DTL change in spa_syncing_txg(spa). | |
2755 | * In the zil_claim() case, we commit in spa_first_txg(spa). | |
fb5f0bc8 BB |
2756 | * |
2757 | * We currently do not make DTL entries for failed spontaneous | |
2758 | * self-healing writes triggered by normal (non-scrubbing) | |
2759 | * reads, because we have no transactional context in which to | |
2760 | * do so -- and it's not clear that it'd be desirable anyway. | |
2761 | */ | |
2762 | if (vd->vdev_ops->vdev_op_leaf) { | |
2763 | uint64_t commit_txg = txg; | |
572e2857 | 2764 | if (flags & ZIO_FLAG_SCAN_THREAD) { |
fb5f0bc8 BB |
2765 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); |
2766 | ASSERT(spa_sync_pass(spa) == 1); | |
2767 | vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); | |
428870ff BB |
2768 | commit_txg = spa_syncing_txg(spa); |
2769 | } else if (spa->spa_claiming) { | |
2770 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
2771 | commit_txg = spa_first_txg(spa); | |
fb5f0bc8 | 2772 | } |
428870ff | 2773 | ASSERT(commit_txg >= spa_syncing_txg(spa)); |
fb5f0bc8 | 2774 | if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) |
34dc7c2f | 2775 | return; |
fb5f0bc8 BB |
2776 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) |
2777 | vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); | |
2778 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); | |
34dc7c2f | 2779 | } |
fb5f0bc8 BB |
2780 | if (vd != rvd) |
2781 | vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); | |
34dc7c2f BB |
2782 | } |
2783 | } | |
2784 | ||
34dc7c2f | 2785 | /* |
428870ff BB |
2786 | * Update the in-core space usage stats for this vdev, its metaslab class, |
2787 | * and the root vdev. | |
34dc7c2f BB |
2788 | */ |
2789 | void | |
428870ff BB |
2790 | vdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, |
2791 | int64_t space_delta) | |
34dc7c2f BB |
2792 | { |
2793 | int64_t dspace_delta = space_delta; | |
2794 | spa_t *spa = vd->vdev_spa; | |
2795 | vdev_t *rvd = spa->spa_root_vdev; | |
428870ff BB |
2796 | metaslab_group_t *mg = vd->vdev_mg; |
2797 | metaslab_class_t *mc = mg ? mg->mg_class : NULL; | |
34dc7c2f BB |
2798 | |
2799 | ASSERT(vd == vd->vdev_top); | |
2800 | ||
2801 | /* | |
2802 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
2803 | * factor. We must calculate this here and not at the root vdev | |
2804 | * because the root vdev's psize-to-asize is simply the max of its | |
2805 | * childrens', thus not accurate enough for us. | |
2806 | */ | |
2807 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
9babb374 | 2808 | ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); |
34dc7c2f BB |
2809 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * |
2810 | vd->vdev_deflate_ratio; | |
2811 | ||
2812 | mutex_enter(&vd->vdev_stat_lock); | |
34dc7c2f | 2813 | vd->vdev_stat.vs_alloc += alloc_delta; |
428870ff | 2814 | vd->vdev_stat.vs_space += space_delta; |
34dc7c2f BB |
2815 | vd->vdev_stat.vs_dspace += dspace_delta; |
2816 | mutex_exit(&vd->vdev_stat_lock); | |
2817 | ||
428870ff | 2818 | if (mc == spa_normal_class(spa)) { |
34dc7c2f | 2819 | mutex_enter(&rvd->vdev_stat_lock); |
34dc7c2f | 2820 | rvd->vdev_stat.vs_alloc += alloc_delta; |
428870ff | 2821 | rvd->vdev_stat.vs_space += space_delta; |
34dc7c2f BB |
2822 | rvd->vdev_stat.vs_dspace += dspace_delta; |
2823 | mutex_exit(&rvd->vdev_stat_lock); | |
2824 | } | |
428870ff BB |
2825 | |
2826 | if (mc != NULL) { | |
2827 | ASSERT(rvd == vd->vdev_parent); | |
2828 | ASSERT(vd->vdev_ms_count != 0); | |
2829 | ||
2830 | metaslab_class_space_update(mc, | |
2831 | alloc_delta, defer_delta, space_delta, dspace_delta); | |
2832 | } | |
34dc7c2f BB |
2833 | } |
2834 | ||
2835 | /* | |
2836 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
2837 | * so that it will be written out next time the vdev configuration is synced. | |
2838 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
2839 | */ | |
2840 | void | |
2841 | vdev_config_dirty(vdev_t *vd) | |
2842 | { | |
2843 | spa_t *spa = vd->vdev_spa; | |
2844 | vdev_t *rvd = spa->spa_root_vdev; | |
2845 | int c; | |
2846 | ||
572e2857 BB |
2847 | ASSERT(spa_writeable(spa)); |
2848 | ||
34dc7c2f | 2849 | /* |
9babb374 BB |
2850 | * If this is an aux vdev (as with l2cache and spare devices), then we |
2851 | * update the vdev config manually and set the sync flag. | |
b128c09f BB |
2852 | */ |
2853 | if (vd->vdev_aux != NULL) { | |
2854 | spa_aux_vdev_t *sav = vd->vdev_aux; | |
2855 | nvlist_t **aux; | |
2856 | uint_t naux; | |
2857 | ||
2858 | for (c = 0; c < sav->sav_count; c++) { | |
2859 | if (sav->sav_vdevs[c] == vd) | |
2860 | break; | |
2861 | } | |
2862 | ||
2863 | if (c == sav->sav_count) { | |
2864 | /* | |
2865 | * We're being removed. There's nothing more to do. | |
2866 | */ | |
2867 | ASSERT(sav->sav_sync == B_TRUE); | |
2868 | return; | |
2869 | } | |
2870 | ||
2871 | sav->sav_sync = B_TRUE; | |
2872 | ||
9babb374 BB |
2873 | if (nvlist_lookup_nvlist_array(sav->sav_config, |
2874 | ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { | |
2875 | VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, | |
2876 | ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); | |
2877 | } | |
b128c09f BB |
2878 | |
2879 | ASSERT(c < naux); | |
2880 | ||
2881 | /* | |
2882 | * Setting the nvlist in the middle if the array is a little | |
2883 | * sketchy, but it will work. | |
2884 | */ | |
2885 | nvlist_free(aux[c]); | |
428870ff | 2886 | aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); |
b128c09f BB |
2887 | |
2888 | return; | |
2889 | } | |
2890 | ||
2891 | /* | |
2892 | * The dirty list is protected by the SCL_CONFIG lock. The caller | |
2893 | * must either hold SCL_CONFIG as writer, or must be the sync thread | |
2894 | * (which holds SCL_CONFIG as reader). There's only one sync thread, | |
34dc7c2f BB |
2895 | * so this is sufficient to ensure mutual exclusion. |
2896 | */ | |
b128c09f BB |
2897 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2898 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2899 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f BB |
2900 | |
2901 | if (vd == rvd) { | |
2902 | for (c = 0; c < rvd->vdev_children; c++) | |
2903 | vdev_config_dirty(rvd->vdev_child[c]); | |
2904 | } else { | |
2905 | ASSERT(vd == vd->vdev_top); | |
2906 | ||
428870ff BB |
2907 | if (!list_link_active(&vd->vdev_config_dirty_node) && |
2908 | !vd->vdev_ishole) | |
b128c09f | 2909 | list_insert_head(&spa->spa_config_dirty_list, vd); |
34dc7c2f BB |
2910 | } |
2911 | } | |
2912 | ||
2913 | void | |
2914 | vdev_config_clean(vdev_t *vd) | |
2915 | { | |
2916 | spa_t *spa = vd->vdev_spa; | |
2917 | ||
b128c09f BB |
2918 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2919 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2920 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f | 2921 | |
b128c09f BB |
2922 | ASSERT(list_link_active(&vd->vdev_config_dirty_node)); |
2923 | list_remove(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2924 | } |
2925 | ||
b128c09f BB |
2926 | /* |
2927 | * Mark a top-level vdev's state as dirty, so that the next pass of | |
2928 | * spa_sync() can convert this into vdev_config_dirty(). We distinguish | |
2929 | * the state changes from larger config changes because they require | |
2930 | * much less locking, and are often needed for administrative actions. | |
2931 | */ | |
2932 | void | |
2933 | vdev_state_dirty(vdev_t *vd) | |
2934 | { | |
2935 | spa_t *spa = vd->vdev_spa; | |
2936 | ||
572e2857 | 2937 | ASSERT(spa_writeable(spa)); |
b128c09f BB |
2938 | ASSERT(vd == vd->vdev_top); |
2939 | ||
2940 | /* | |
2941 | * The state list is protected by the SCL_STATE lock. The caller | |
2942 | * must either hold SCL_STATE as writer, or must be the sync thread | |
2943 | * (which holds SCL_STATE as reader). There's only one sync thread, | |
2944 | * so this is sufficient to ensure mutual exclusion. | |
2945 | */ | |
2946 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2947 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2948 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2949 | ||
428870ff | 2950 | if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole) |
b128c09f BB |
2951 | list_insert_head(&spa->spa_state_dirty_list, vd); |
2952 | } | |
2953 | ||
2954 | void | |
2955 | vdev_state_clean(vdev_t *vd) | |
2956 | { | |
2957 | spa_t *spa = vd->vdev_spa; | |
2958 | ||
2959 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2960 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2961 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2962 | ||
2963 | ASSERT(list_link_active(&vd->vdev_state_dirty_node)); | |
2964 | list_remove(&spa->spa_state_dirty_list, vd); | |
2965 | } | |
2966 | ||
2967 | /* | |
2968 | * Propagate vdev state up from children to parent. | |
2969 | */ | |
34dc7c2f BB |
2970 | void |
2971 | vdev_propagate_state(vdev_t *vd) | |
2972 | { | |
fb5f0bc8 BB |
2973 | spa_t *spa = vd->vdev_spa; |
2974 | vdev_t *rvd = spa->spa_root_vdev; | |
34dc7c2f BB |
2975 | int degraded = 0, faulted = 0; |
2976 | int corrupted = 0; | |
34dc7c2f | 2977 | vdev_t *child; |
d6320ddb | 2978 | int c; |
34dc7c2f BB |
2979 | |
2980 | if (vd->vdev_children > 0) { | |
d6320ddb | 2981 | for (c = 0; c < vd->vdev_children; c++) { |
34dc7c2f | 2982 | child = vd->vdev_child[c]; |
b128c09f | 2983 | |
428870ff BB |
2984 | /* |
2985 | * Don't factor holes into the decision. | |
2986 | */ | |
2987 | if (child->vdev_ishole) | |
2988 | continue; | |
2989 | ||
b128c09f | 2990 | if (!vdev_readable(child) || |
fb5f0bc8 | 2991 | (!vdev_writeable(child) && spa_writeable(spa))) { |
b128c09f BB |
2992 | /* |
2993 | * Root special: if there is a top-level log | |
2994 | * device, treat the root vdev as if it were | |
2995 | * degraded. | |
2996 | */ | |
2997 | if (child->vdev_islog && vd == rvd) | |
2998 | degraded++; | |
2999 | else | |
3000 | faulted++; | |
3001 | } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { | |
34dc7c2f | 3002 | degraded++; |
b128c09f | 3003 | } |
34dc7c2f BB |
3004 | |
3005 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
3006 | corrupted++; | |
3007 | } | |
3008 | ||
3009 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
3010 | ||
3011 | /* | |
b128c09f | 3012 | * Root special: if there is a top-level vdev that cannot be |
34dc7c2f BB |
3013 | * opened due to corrupted metadata, then propagate the root |
3014 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
3015 | * replicas'. | |
3016 | */ | |
3017 | if (corrupted && vd == rvd && | |
3018 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
3019 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
3020 | VDEV_AUX_CORRUPT_DATA); | |
3021 | } | |
3022 | ||
b128c09f | 3023 | if (vd->vdev_parent) |
34dc7c2f BB |
3024 | vdev_propagate_state(vd->vdev_parent); |
3025 | } | |
3026 | ||
3027 | /* | |
3028 | * Set a vdev's state. If this is during an open, we don't update the parent | |
3029 | * state, because we're in the process of opening children depth-first. | |
3030 | * Otherwise, we propagate the change to the parent. | |
3031 | * | |
3032 | * If this routine places a device in a faulted state, an appropriate ereport is | |
3033 | * generated. | |
3034 | */ | |
3035 | void | |
3036 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
3037 | { | |
3038 | uint64_t save_state; | |
b128c09f | 3039 | spa_t *spa = vd->vdev_spa; |
34dc7c2f BB |
3040 | |
3041 | if (state == vd->vdev_state) { | |
3042 | vd->vdev_stat.vs_aux = aux; | |
3043 | return; | |
3044 | } | |
3045 | ||
3046 | save_state = vd->vdev_state; | |
3047 | ||
3048 | vd->vdev_state = state; | |
3049 | vd->vdev_stat.vs_aux = aux; | |
3050 | ||
3051 | /* | |
3052 | * If we are setting the vdev state to anything but an open state, then | |
428870ff BB |
3053 | * always close the underlying device unless the device has requested |
3054 | * a delayed close (i.e. we're about to remove or fault the device). | |
3055 | * Otherwise, we keep accessible but invalid devices open forever. | |
3056 | * We don't call vdev_close() itself, because that implies some extra | |
3057 | * checks (offline, etc) that we don't want here. This is limited to | |
3058 | * leaf devices, because otherwise closing the device will affect other | |
3059 | * children. | |
34dc7c2f | 3060 | */ |
428870ff BB |
3061 | if (!vd->vdev_delayed_close && vdev_is_dead(vd) && |
3062 | vd->vdev_ops->vdev_op_leaf) | |
34dc7c2f BB |
3063 | vd->vdev_ops->vdev_op_close(vd); |
3064 | ||
428870ff BB |
3065 | /* |
3066 | * If we have brought this vdev back into service, we need | |
3067 | * to notify fmd so that it can gracefully repair any outstanding | |
3068 | * cases due to a missing device. We do this in all cases, even those | |
3069 | * that probably don't correlate to a repaired fault. This is sure to | |
3070 | * catch all cases, and we let the zfs-retire agent sort it out. If | |
3071 | * this is a transient state it's OK, as the retire agent will | |
3072 | * double-check the state of the vdev before repairing it. | |
3073 | */ | |
3074 | if (state == VDEV_STATE_HEALTHY && vd->vdev_ops->vdev_op_leaf && | |
3075 | vd->vdev_prevstate != state) | |
3076 | zfs_post_state_change(spa, vd); | |
3077 | ||
34dc7c2f BB |
3078 | if (vd->vdev_removed && |
3079 | state == VDEV_STATE_CANT_OPEN && | |
3080 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
3081 | /* | |
3082 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
3083 | * device was previously marked removed and someone attempted to | |
3084 | * reopen it. If this failed due to a nonexistent device, then | |
3085 | * keep the device in the REMOVED state. We also let this be if | |
3086 | * it is one of our special test online cases, which is only | |
3087 | * attempting to online the device and shouldn't generate an FMA | |
3088 | * fault. | |
3089 | */ | |
3090 | vd->vdev_state = VDEV_STATE_REMOVED; | |
3091 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
3092 | } else if (state == VDEV_STATE_REMOVED) { | |
34dc7c2f BB |
3093 | vd->vdev_removed = B_TRUE; |
3094 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
3095 | /* | |
572e2857 BB |
3096 | * If we fail to open a vdev during an import or recovery, we |
3097 | * mark it as "not available", which signifies that it was | |
3098 | * never there to begin with. Failure to open such a device | |
3099 | * is not considered an error. | |
34dc7c2f | 3100 | */ |
572e2857 BB |
3101 | if ((spa_load_state(spa) == SPA_LOAD_IMPORT || |
3102 | spa_load_state(spa) == SPA_LOAD_RECOVER) && | |
34dc7c2f BB |
3103 | vd->vdev_ops->vdev_op_leaf) |
3104 | vd->vdev_not_present = 1; | |
3105 | ||
3106 | /* | |
3107 | * Post the appropriate ereport. If the 'prevstate' field is | |
3108 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
3109 | * that this is part of a vdev_reopen(). In this case, we don't | |
3110 | * want to post the ereport if the device was already in the | |
3111 | * CANT_OPEN state beforehand. | |
3112 | * | |
3113 | * If the 'checkremove' flag is set, then this is an attempt to | |
3114 | * online the device in response to an insertion event. If we | |
3115 | * hit this case, then we have detected an insertion event for a | |
3116 | * faulted or offline device that wasn't in the removed state. | |
3117 | * In this scenario, we don't post an ereport because we are | |
3118 | * about to replace the device, or attempt an online with | |
3119 | * vdev_forcefault, which will generate the fault for us. | |
3120 | */ | |
3121 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
3122 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
b128c09f | 3123 | vd != spa->spa_root_vdev) { |
34dc7c2f BB |
3124 | const char *class; |
3125 | ||
3126 | switch (aux) { | |
3127 | case VDEV_AUX_OPEN_FAILED: | |
3128 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
3129 | break; | |
3130 | case VDEV_AUX_CORRUPT_DATA: | |
3131 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
3132 | break; | |
3133 | case VDEV_AUX_NO_REPLICAS: | |
3134 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
3135 | break; | |
3136 | case VDEV_AUX_BAD_GUID_SUM: | |
3137 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
3138 | break; | |
3139 | case VDEV_AUX_TOO_SMALL: | |
3140 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
3141 | break; | |
3142 | case VDEV_AUX_BAD_LABEL: | |
3143 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
3144 | break; | |
3145 | default: | |
3146 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
3147 | } | |
3148 | ||
b128c09f | 3149 | zfs_ereport_post(class, spa, vd, NULL, save_state, 0); |
34dc7c2f BB |
3150 | } |
3151 | ||
3152 | /* Erase any notion of persistent removed state */ | |
3153 | vd->vdev_removed = B_FALSE; | |
3154 | } else { | |
3155 | vd->vdev_removed = B_FALSE; | |
3156 | } | |
3157 | ||
9babb374 BB |
3158 | if (!isopen && vd->vdev_parent) |
3159 | vdev_propagate_state(vd->vdev_parent); | |
34dc7c2f | 3160 | } |
b128c09f BB |
3161 | |
3162 | /* | |
3163 | * Check the vdev configuration to ensure that it's capable of supporting | |
57a4eddc | 3164 | * a root pool. |
b128c09f BB |
3165 | */ |
3166 | boolean_t | |
3167 | vdev_is_bootable(vdev_t *vd) | |
3168 | { | |
57a4eddc RL |
3169 | #if defined(__sun__) || defined(__sun) |
3170 | /* | |
3171 | * Currently, we do not support RAID-Z or partial configuration. | |
3172 | * In addition, only a single top-level vdev is allowed and none of the | |
3173 | * leaves can be wholedisks. | |
3174 | */ | |
d6320ddb BB |
3175 | int c; |
3176 | ||
b128c09f BB |
3177 | if (!vd->vdev_ops->vdev_op_leaf) { |
3178 | char *vdev_type = vd->vdev_ops->vdev_op_type; | |
3179 | ||
3180 | if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && | |
3181 | vd->vdev_children > 1) { | |
3182 | return (B_FALSE); | |
3183 | } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || | |
3184 | strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { | |
3185 | return (B_FALSE); | |
3186 | } | |
3187 | } else if (vd->vdev_wholedisk == 1) { | |
3188 | return (B_FALSE); | |
3189 | } | |
3190 | ||
d6320ddb | 3191 | for (c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
3192 | if (!vdev_is_bootable(vd->vdev_child[c])) |
3193 | return (B_FALSE); | |
3194 | } | |
57a4eddc | 3195 | #endif /* __sun__ || __sun */ |
b128c09f BB |
3196 | return (B_TRUE); |
3197 | } | |
9babb374 | 3198 | |
428870ff BB |
3199 | /* |
3200 | * Load the state from the original vdev tree (ovd) which | |
3201 | * we've retrieved from the MOS config object. If the original | |
572e2857 BB |
3202 | * vdev was offline or faulted then we transfer that state to the |
3203 | * device in the current vdev tree (nvd). | |
428870ff | 3204 | */ |
9babb374 | 3205 | void |
428870ff | 3206 | vdev_load_log_state(vdev_t *nvd, vdev_t *ovd) |
9babb374 | 3207 | { |
d6320ddb | 3208 | int c; |
9babb374 | 3209 | |
572e2857 | 3210 | ASSERT(nvd->vdev_top->vdev_islog); |
1fde1e37 BB |
3211 | ASSERT(spa_config_held(nvd->vdev_spa, |
3212 | SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
428870ff | 3213 | ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid); |
9babb374 | 3214 | |
d6320ddb | 3215 | for (c = 0; c < nvd->vdev_children; c++) |
428870ff | 3216 | vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]); |
9babb374 | 3217 | |
572e2857 | 3218 | if (nvd->vdev_ops->vdev_op_leaf) { |
9babb374 | 3219 | /* |
572e2857 | 3220 | * Restore the persistent vdev state |
9babb374 | 3221 | */ |
428870ff | 3222 | nvd->vdev_offline = ovd->vdev_offline; |
572e2857 BB |
3223 | nvd->vdev_faulted = ovd->vdev_faulted; |
3224 | nvd->vdev_degraded = ovd->vdev_degraded; | |
3225 | nvd->vdev_removed = ovd->vdev_removed; | |
9babb374 BB |
3226 | } |
3227 | } | |
3228 | ||
572e2857 BB |
3229 | /* |
3230 | * Determine if a log device has valid content. If the vdev was | |
3231 | * removed or faulted in the MOS config then we know that | |
3232 | * the content on the log device has already been written to the pool. | |
3233 | */ | |
3234 | boolean_t | |
3235 | vdev_log_state_valid(vdev_t *vd) | |
3236 | { | |
d6320ddb BB |
3237 | int c; |
3238 | ||
572e2857 BB |
3239 | if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && |
3240 | !vd->vdev_removed) | |
3241 | return (B_TRUE); | |
3242 | ||
d6320ddb | 3243 | for (c = 0; c < vd->vdev_children; c++) |
572e2857 BB |
3244 | if (vdev_log_state_valid(vd->vdev_child[c])) |
3245 | return (B_TRUE); | |
3246 | ||
3247 | return (B_FALSE); | |
3248 | } | |
3249 | ||
9babb374 BB |
3250 | /* |
3251 | * Expand a vdev if possible. | |
3252 | */ | |
3253 | void | |
3254 | vdev_expand(vdev_t *vd, uint64_t txg) | |
3255 | { | |
3256 | ASSERT(vd->vdev_top == vd); | |
3257 | ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
3258 | ||
3259 | if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { | |
3260 | VERIFY(vdev_metaslab_init(vd, txg) == 0); | |
3261 | vdev_config_dirty(vd); | |
3262 | } | |
3263 | } | |
428870ff BB |
3264 | |
3265 | /* | |
3266 | * Split a vdev. | |
3267 | */ | |
3268 | void | |
3269 | vdev_split(vdev_t *vd) | |
3270 | { | |
3271 | vdev_t *cvd, *pvd = vd->vdev_parent; | |
3272 | ||
3273 | vdev_remove_child(pvd, vd); | |
3274 | vdev_compact_children(pvd); | |
3275 | ||
3276 | cvd = pvd->vdev_child[0]; | |
3277 | if (pvd->vdev_children == 1) { | |
3278 | vdev_remove_parent(cvd); | |
3279 | cvd->vdev_splitting = B_TRUE; | |
3280 | } | |
3281 | vdev_propagate_state(cvd); | |
3282 | } | |
c28b2279 | 3283 | |
c06d4368 AX |
3284 | void |
3285 | vdev_deadman(vdev_t *vd) | |
3286 | { | |
3287 | int c; | |
3288 | ||
3289 | for (c = 0; c < vd->vdev_children; c++) { | |
3290 | vdev_t *cvd = vd->vdev_child[c]; | |
3291 | ||
3292 | vdev_deadman(cvd); | |
3293 | } | |
3294 | ||
3295 | if (vd->vdev_ops->vdev_op_leaf) { | |
3296 | vdev_queue_t *vq = &vd->vdev_queue; | |
3297 | ||
3298 | mutex_enter(&vq->vq_lock); | |
a08ee875 | 3299 | if (avl_numnodes(&vq->vq_active_tree) > 0) { |
c06d4368 AX |
3300 | spa_t *spa = vd->vdev_spa; |
3301 | zio_t *fio; | |
3302 | uint64_t delta; | |
3303 | ||
3304 | /* | |
3305 | * Look at the head of all the pending queues, | |
3306 | * if any I/O has been outstanding for longer than | |
3307 | * the spa_deadman_synctime we log a zevent. | |
3308 | */ | |
a08ee875 | 3309 | fio = avl_first(&vq->vq_active_tree); |
c06d4368 AX |
3310 | delta = gethrtime() - fio->io_timestamp; |
3311 | if (delta > spa_deadman_synctime(spa)) { | |
3312 | zfs_dbgmsg("SLOW IO: zio timestamp %lluns, " | |
3313 | "delta %lluns, last io %lluns", | |
3314 | fio->io_timestamp, delta, | |
3315 | vq->vq_io_complete_ts); | |
3316 | zfs_ereport_post(FM_EREPORT_ZFS_DELAY, | |
3317 | spa, vd, fio, 0, 0); | |
3318 | } | |
3319 | } | |
3320 | mutex_exit(&vq->vq_lock); | |
3321 | } | |
3322 | } | |
3323 | ||
c28b2279 BB |
3324 | #if defined(_KERNEL) && defined(HAVE_SPL) |
3325 | EXPORT_SYMBOL(vdev_fault); | |
3326 | EXPORT_SYMBOL(vdev_degrade); | |
3327 | EXPORT_SYMBOL(vdev_online); | |
3328 | EXPORT_SYMBOL(vdev_offline); | |
3329 | EXPORT_SYMBOL(vdev_clear); | |
3330 | #endif |