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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 | /* | |
23 | * Copyright 2007 Sun Microsystems, Inc. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | */ | |
26 | ||
27 | #pragma ident "@(#)vdev.c 1.33 07/11/27 SMI" | |
28 | ||
29 | #include <sys/zfs_context.h> | |
30 | #include <sys/fm/fs/zfs.h> | |
31 | #include <sys/spa.h> | |
32 | #include <sys/spa_impl.h> | |
33 | #include <sys/dmu.h> | |
34 | #include <sys/dmu_tx.h> | |
35 | #include <sys/vdev_impl.h> | |
36 | #include <sys/uberblock_impl.h> | |
37 | #include <sys/metaslab.h> | |
38 | #include <sys/metaslab_impl.h> | |
39 | #include <sys/space_map.h> | |
40 | #include <sys/zio.h> | |
41 | #include <sys/zap.h> | |
42 | #include <sys/fs/zfs.h> | |
43 | ||
44 | /* | |
45 | * Virtual device management. | |
46 | */ | |
47 | ||
48 | static vdev_ops_t *vdev_ops_table[] = { | |
49 | &vdev_root_ops, | |
50 | &vdev_raidz_ops, | |
51 | &vdev_mirror_ops, | |
52 | &vdev_replacing_ops, | |
53 | &vdev_spare_ops, | |
54 | &vdev_disk_ops, | |
55 | &vdev_file_ops, | |
56 | &vdev_missing_ops, | |
57 | NULL | |
58 | }; | |
59 | ||
60 | /* maximum scrub/resilver I/O queue */ | |
61 | int zfs_scrub_limit = 70; | |
62 | ||
63 | /* | |
64 | * Given a vdev type, return the appropriate ops vector. | |
65 | */ | |
66 | static vdev_ops_t * | |
67 | vdev_getops(const char *type) | |
68 | { | |
69 | vdev_ops_t *ops, **opspp; | |
70 | ||
71 | for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) | |
72 | if (strcmp(ops->vdev_op_type, type) == 0) | |
73 | break; | |
74 | ||
75 | return (ops); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Default asize function: return the MAX of psize with the asize of | |
80 | * all children. This is what's used by anything other than RAID-Z. | |
81 | */ | |
82 | uint64_t | |
83 | vdev_default_asize(vdev_t *vd, uint64_t psize) | |
84 | { | |
85 | uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); | |
86 | uint64_t csize; | |
87 | uint64_t c; | |
88 | ||
89 | for (c = 0; c < vd->vdev_children; c++) { | |
90 | csize = vdev_psize_to_asize(vd->vdev_child[c], psize); | |
91 | asize = MAX(asize, csize); | |
92 | } | |
93 | ||
94 | return (asize); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Get the replaceable or attachable device size. | |
99 | * If the parent is a mirror or raidz, the replaceable size is the minimum | |
100 | * psize of all its children. For the rest, just return our own psize. | |
101 | * | |
102 | * e.g. | |
103 | * psize rsize | |
104 | * root - - | |
105 | * mirror/raidz - - | |
106 | * disk1 20g 20g | |
107 | * disk2 40g 20g | |
108 | * disk3 80g 80g | |
109 | */ | |
110 | uint64_t | |
111 | vdev_get_rsize(vdev_t *vd) | |
112 | { | |
113 | vdev_t *pvd, *cvd; | |
114 | uint64_t c, rsize; | |
115 | ||
116 | pvd = vd->vdev_parent; | |
117 | ||
118 | /* | |
119 | * If our parent is NULL or the root, just return our own psize. | |
120 | */ | |
121 | if (pvd == NULL || pvd->vdev_parent == NULL) | |
122 | return (vd->vdev_psize); | |
123 | ||
124 | rsize = 0; | |
125 | ||
126 | for (c = 0; c < pvd->vdev_children; c++) { | |
127 | cvd = pvd->vdev_child[c]; | |
128 | rsize = MIN(rsize - 1, cvd->vdev_psize - 1) + 1; | |
129 | } | |
130 | ||
131 | return (rsize); | |
132 | } | |
133 | ||
134 | vdev_t * | |
135 | vdev_lookup_top(spa_t *spa, uint64_t vdev) | |
136 | { | |
137 | vdev_t *rvd = spa->spa_root_vdev; | |
138 | ||
139 | ASSERT(spa_config_held(spa, RW_READER) || | |
140 | curthread == spa->spa_scrub_thread); | |
141 | ||
142 | if (vdev < rvd->vdev_children) | |
143 | return (rvd->vdev_child[vdev]); | |
144 | ||
145 | return (NULL); | |
146 | } | |
147 | ||
148 | vdev_t * | |
149 | vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) | |
150 | { | |
151 | int c; | |
152 | vdev_t *mvd; | |
153 | ||
154 | if (vd->vdev_guid == guid) | |
155 | return (vd); | |
156 | ||
157 | for (c = 0; c < vd->vdev_children; c++) | |
158 | if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != | |
159 | NULL) | |
160 | return (mvd); | |
161 | ||
162 | return (NULL); | |
163 | } | |
164 | ||
165 | void | |
166 | vdev_add_child(vdev_t *pvd, vdev_t *cvd) | |
167 | { | |
168 | size_t oldsize, newsize; | |
169 | uint64_t id = cvd->vdev_id; | |
170 | vdev_t **newchild; | |
171 | ||
172 | ASSERT(spa_config_held(cvd->vdev_spa, RW_WRITER)); | |
173 | ASSERT(cvd->vdev_parent == NULL); | |
174 | ||
175 | cvd->vdev_parent = pvd; | |
176 | ||
177 | if (pvd == NULL) | |
178 | return; | |
179 | ||
180 | ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); | |
181 | ||
182 | oldsize = pvd->vdev_children * sizeof (vdev_t *); | |
183 | pvd->vdev_children = MAX(pvd->vdev_children, id + 1); | |
184 | newsize = pvd->vdev_children * sizeof (vdev_t *); | |
185 | ||
186 | newchild = kmem_zalloc(newsize, KM_SLEEP); | |
187 | if (pvd->vdev_child != NULL) { | |
188 | bcopy(pvd->vdev_child, newchild, oldsize); | |
189 | kmem_free(pvd->vdev_child, oldsize); | |
190 | } | |
191 | ||
192 | pvd->vdev_child = newchild; | |
193 | pvd->vdev_child[id] = cvd; | |
194 | ||
195 | cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); | |
196 | ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); | |
197 | ||
198 | /* | |
199 | * Walk up all ancestors to update guid sum. | |
200 | */ | |
201 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
202 | pvd->vdev_guid_sum += cvd->vdev_guid_sum; | |
203 | ||
204 | if (cvd->vdev_ops->vdev_op_leaf) | |
205 | cvd->vdev_spa->spa_scrub_maxinflight += zfs_scrub_limit; | |
206 | } | |
207 | ||
208 | void | |
209 | vdev_remove_child(vdev_t *pvd, vdev_t *cvd) | |
210 | { | |
211 | int c; | |
212 | uint_t id = cvd->vdev_id; | |
213 | ||
214 | ASSERT(cvd->vdev_parent == pvd); | |
215 | ||
216 | if (pvd == NULL) | |
217 | return; | |
218 | ||
219 | ASSERT(id < pvd->vdev_children); | |
220 | ASSERT(pvd->vdev_child[id] == cvd); | |
221 | ||
222 | pvd->vdev_child[id] = NULL; | |
223 | cvd->vdev_parent = NULL; | |
224 | ||
225 | for (c = 0; c < pvd->vdev_children; c++) | |
226 | if (pvd->vdev_child[c]) | |
227 | break; | |
228 | ||
229 | if (c == pvd->vdev_children) { | |
230 | kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); | |
231 | pvd->vdev_child = NULL; | |
232 | pvd->vdev_children = 0; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Walk up all ancestors to update guid sum. | |
237 | */ | |
238 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
239 | pvd->vdev_guid_sum -= cvd->vdev_guid_sum; | |
240 | ||
241 | if (cvd->vdev_ops->vdev_op_leaf) | |
242 | cvd->vdev_spa->spa_scrub_maxinflight -= zfs_scrub_limit; | |
243 | } | |
244 | ||
245 | /* | |
246 | * Remove any holes in the child array. | |
247 | */ | |
248 | void | |
249 | vdev_compact_children(vdev_t *pvd) | |
250 | { | |
251 | vdev_t **newchild, *cvd; | |
252 | int oldc = pvd->vdev_children; | |
253 | int newc, c; | |
254 | ||
255 | ASSERT(spa_config_held(pvd->vdev_spa, RW_WRITER)); | |
256 | ||
257 | for (c = newc = 0; c < oldc; c++) | |
258 | if (pvd->vdev_child[c]) | |
259 | newc++; | |
260 | ||
261 | newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); | |
262 | ||
263 | for (c = newc = 0; c < oldc; c++) { | |
264 | if ((cvd = pvd->vdev_child[c]) != NULL) { | |
265 | newchild[newc] = cvd; | |
266 | cvd->vdev_id = newc++; | |
267 | } | |
268 | } | |
269 | ||
270 | kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); | |
271 | pvd->vdev_child = newchild; | |
272 | pvd->vdev_children = newc; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Allocate and minimally initialize a vdev_t. | |
277 | */ | |
278 | static vdev_t * | |
279 | vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) | |
280 | { | |
281 | vdev_t *vd; | |
282 | ||
283 | vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); | |
284 | ||
285 | if (spa->spa_root_vdev == NULL) { | |
286 | ASSERT(ops == &vdev_root_ops); | |
287 | spa->spa_root_vdev = vd; | |
288 | } | |
289 | ||
290 | if (guid == 0) { | |
291 | if (spa->spa_root_vdev == vd) { | |
292 | /* | |
293 | * The root vdev's guid will also be the pool guid, | |
294 | * which must be unique among all pools. | |
295 | */ | |
296 | while (guid == 0 || spa_guid_exists(guid, 0)) | |
297 | guid = spa_get_random(-1ULL); | |
298 | } else { | |
299 | /* | |
300 | * Any other vdev's guid must be unique within the pool. | |
301 | */ | |
302 | while (guid == 0 || | |
303 | spa_guid_exists(spa_guid(spa), guid)) | |
304 | guid = spa_get_random(-1ULL); | |
305 | } | |
306 | ASSERT(!spa_guid_exists(spa_guid(spa), guid)); | |
307 | } | |
308 | ||
309 | vd->vdev_spa = spa; | |
310 | vd->vdev_id = id; | |
311 | vd->vdev_guid = guid; | |
312 | vd->vdev_guid_sum = guid; | |
313 | vd->vdev_ops = ops; | |
314 | vd->vdev_state = VDEV_STATE_CLOSED; | |
315 | ||
316 | mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); | |
317 | mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); | |
318 | space_map_create(&vd->vdev_dtl_map, 0, -1ULL, 0, &vd->vdev_dtl_lock); | |
319 | space_map_create(&vd->vdev_dtl_scrub, 0, -1ULL, 0, &vd->vdev_dtl_lock); | |
320 | txg_list_create(&vd->vdev_ms_list, | |
321 | offsetof(struct metaslab, ms_txg_node)); | |
322 | txg_list_create(&vd->vdev_dtl_list, | |
323 | offsetof(struct vdev, vdev_dtl_node)); | |
324 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
325 | vdev_queue_init(vd); | |
326 | vdev_cache_init(vd); | |
327 | ||
328 | return (vd); | |
329 | } | |
330 | ||
331 | /* | |
332 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
333 | * creating a new vdev or loading an existing one - the behavior is slightly | |
334 | * different for each case. | |
335 | */ | |
336 | int | |
337 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
338 | int alloctype) | |
339 | { | |
340 | vdev_ops_t *ops; | |
341 | char *type; | |
342 | uint64_t guid = 0, islog, nparity; | |
343 | vdev_t *vd; | |
344 | ||
345 | ASSERT(spa_config_held(spa, RW_WRITER)); | |
346 | ||
347 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
348 | return (EINVAL); | |
349 | ||
350 | if ((ops = vdev_getops(type)) == NULL) | |
351 | return (EINVAL); | |
352 | ||
353 | /* | |
354 | * If this is a load, get the vdev guid from the nvlist. | |
355 | * Otherwise, vdev_alloc_common() will generate one for us. | |
356 | */ | |
357 | if (alloctype == VDEV_ALLOC_LOAD) { | |
358 | uint64_t label_id; | |
359 | ||
360 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
361 | label_id != id) | |
362 | return (EINVAL); | |
363 | ||
364 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
365 | return (EINVAL); | |
366 | } else if (alloctype == VDEV_ALLOC_SPARE) { | |
367 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
368 | return (EINVAL); | |
369 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { | |
370 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
371 | return (EINVAL); | |
372 | } | |
373 | ||
374 | /* | |
375 | * The first allocated vdev must be of type 'root'. | |
376 | */ | |
377 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
378 | return (EINVAL); | |
379 | ||
380 | /* | |
381 | * Determine whether we're a log vdev. | |
382 | */ | |
383 | islog = 0; | |
384 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
385 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
386 | return (ENOTSUP); | |
387 | ||
388 | /* | |
389 | * Set the nparity property for RAID-Z vdevs. | |
390 | */ | |
391 | nparity = -1ULL; | |
392 | if (ops == &vdev_raidz_ops) { | |
393 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
394 | &nparity) == 0) { | |
395 | /* | |
396 | * Currently, we can only support 2 parity devices. | |
397 | */ | |
398 | if (nparity == 0 || nparity > 2) | |
399 | return (EINVAL); | |
400 | /* | |
401 | * Older versions can only support 1 parity device. | |
402 | */ | |
403 | if (nparity == 2 && | |
404 | spa_version(spa) < SPA_VERSION_RAID6) | |
405 | return (ENOTSUP); | |
406 | } else { | |
407 | /* | |
408 | * We require the parity to be specified for SPAs that | |
409 | * support multiple parity levels. | |
410 | */ | |
411 | if (spa_version(spa) >= SPA_VERSION_RAID6) | |
412 | return (EINVAL); | |
413 | /* | |
414 | * Otherwise, we default to 1 parity device for RAID-Z. | |
415 | */ | |
416 | nparity = 1; | |
417 | } | |
418 | } else { | |
419 | nparity = 0; | |
420 | } | |
421 | ASSERT(nparity != -1ULL); | |
422 | ||
423 | vd = vdev_alloc_common(spa, id, guid, ops); | |
424 | ||
425 | vd->vdev_islog = islog; | |
426 | vd->vdev_nparity = nparity; | |
427 | ||
428 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
429 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
430 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) | |
431 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
432 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
433 | &vd->vdev_physpath) == 0) | |
434 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
435 | ||
436 | /* | |
437 | * Set the whole_disk property. If it's not specified, leave the value | |
438 | * as -1. | |
439 | */ | |
440 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
441 | &vd->vdev_wholedisk) != 0) | |
442 | vd->vdev_wholedisk = -1ULL; | |
443 | ||
444 | /* | |
445 | * Look for the 'not present' flag. This will only be set if the device | |
446 | * was not present at the time of import. | |
447 | */ | |
448 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, | |
449 | &vd->vdev_not_present); | |
450 | ||
451 | /* | |
452 | * Get the alignment requirement. | |
453 | */ | |
454 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
455 | ||
456 | /* | |
457 | * If we're a top-level vdev, try to load the allocation parameters. | |
458 | */ | |
459 | if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { | |
460 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, | |
461 | &vd->vdev_ms_array); | |
462 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
463 | &vd->vdev_ms_shift); | |
464 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
465 | &vd->vdev_asize); | |
466 | } | |
467 | ||
468 | /* | |
469 | * If we're a leaf vdev, try to load the DTL object and other state. | |
470 | */ | |
471 | if (vd->vdev_ops->vdev_op_leaf && alloctype == VDEV_ALLOC_LOAD) { | |
472 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
473 | &vd->vdev_dtl.smo_object); | |
474 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, | |
475 | &vd->vdev_offline); | |
476 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, | |
477 | &vd->vdev_unspare); | |
478 | /* | |
479 | * When importing a pool, we want to ignore the persistent fault | |
480 | * state, as the diagnosis made on another system may not be | |
481 | * valid in the current context. | |
482 | */ | |
483 | if (spa->spa_load_state == SPA_LOAD_OPEN) { | |
484 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, | |
485 | &vd->vdev_faulted); | |
486 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
487 | &vd->vdev_degraded); | |
488 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
489 | &vd->vdev_removed); | |
490 | } | |
491 | } | |
492 | ||
493 | /* | |
494 | * Add ourselves to the parent's list of children. | |
495 | */ | |
496 | vdev_add_child(parent, vd); | |
497 | ||
498 | *vdp = vd; | |
499 | ||
500 | return (0); | |
501 | } | |
502 | ||
503 | void | |
504 | vdev_free(vdev_t *vd) | |
505 | { | |
506 | int c; | |
507 | spa_t *spa = vd->vdev_spa; | |
508 | ||
509 | /* | |
510 | * vdev_free() implies closing the vdev first. This is simpler than | |
511 | * trying to ensure complicated semantics for all callers. | |
512 | */ | |
513 | vdev_close(vd); | |
514 | ||
515 | ||
516 | ASSERT(!list_link_active(&vd->vdev_dirty_node)); | |
517 | ||
518 | /* | |
519 | * Free all children. | |
520 | */ | |
521 | for (c = 0; c < vd->vdev_children; c++) | |
522 | vdev_free(vd->vdev_child[c]); | |
523 | ||
524 | ASSERT(vd->vdev_child == NULL); | |
525 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
526 | ||
527 | /* | |
528 | * Discard allocation state. | |
529 | */ | |
530 | if (vd == vd->vdev_top) | |
531 | vdev_metaslab_fini(vd); | |
532 | ||
533 | ASSERT3U(vd->vdev_stat.vs_space, ==, 0); | |
534 | ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); | |
535 | ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); | |
536 | ||
537 | /* | |
538 | * Remove this vdev from its parent's child list. | |
539 | */ | |
540 | vdev_remove_child(vd->vdev_parent, vd); | |
541 | ||
542 | ASSERT(vd->vdev_parent == NULL); | |
543 | ||
544 | /* | |
545 | * Clean up vdev structure. | |
546 | */ | |
547 | vdev_queue_fini(vd); | |
548 | vdev_cache_fini(vd); | |
549 | ||
550 | if (vd->vdev_path) | |
551 | spa_strfree(vd->vdev_path); | |
552 | if (vd->vdev_devid) | |
553 | spa_strfree(vd->vdev_devid); | |
554 | if (vd->vdev_physpath) | |
555 | spa_strfree(vd->vdev_physpath); | |
556 | ||
557 | if (vd->vdev_isspare) | |
558 | spa_spare_remove(vd); | |
559 | if (vd->vdev_isl2cache) | |
560 | spa_l2cache_remove(vd); | |
561 | ||
562 | txg_list_destroy(&vd->vdev_ms_list); | |
563 | txg_list_destroy(&vd->vdev_dtl_list); | |
564 | mutex_enter(&vd->vdev_dtl_lock); | |
565 | space_map_unload(&vd->vdev_dtl_map); | |
566 | space_map_destroy(&vd->vdev_dtl_map); | |
567 | space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); | |
568 | space_map_destroy(&vd->vdev_dtl_scrub); | |
569 | mutex_exit(&vd->vdev_dtl_lock); | |
570 | mutex_destroy(&vd->vdev_dtl_lock); | |
571 | mutex_destroy(&vd->vdev_stat_lock); | |
572 | ||
573 | if (vd == spa->spa_root_vdev) | |
574 | spa->spa_root_vdev = NULL; | |
575 | ||
576 | kmem_free(vd, sizeof (vdev_t)); | |
577 | } | |
578 | ||
579 | /* | |
580 | * Transfer top-level vdev state from svd to tvd. | |
581 | */ | |
582 | static void | |
583 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
584 | { | |
585 | spa_t *spa = svd->vdev_spa; | |
586 | metaslab_t *msp; | |
587 | vdev_t *vd; | |
588 | int t; | |
589 | ||
590 | ASSERT(tvd == tvd->vdev_top); | |
591 | ||
592 | tvd->vdev_ms_array = svd->vdev_ms_array; | |
593 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
594 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
595 | ||
596 | svd->vdev_ms_array = 0; | |
597 | svd->vdev_ms_shift = 0; | |
598 | svd->vdev_ms_count = 0; | |
599 | ||
600 | tvd->vdev_mg = svd->vdev_mg; | |
601 | tvd->vdev_ms = svd->vdev_ms; | |
602 | ||
603 | svd->vdev_mg = NULL; | |
604 | svd->vdev_ms = NULL; | |
605 | ||
606 | if (tvd->vdev_mg != NULL) | |
607 | tvd->vdev_mg->mg_vd = tvd; | |
608 | ||
609 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; | |
610 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
611 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
612 | ||
613 | svd->vdev_stat.vs_alloc = 0; | |
614 | svd->vdev_stat.vs_space = 0; | |
615 | svd->vdev_stat.vs_dspace = 0; | |
616 | ||
617 | for (t = 0; t < TXG_SIZE; t++) { | |
618 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
619 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
620 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
621 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
622 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
623 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
624 | } | |
625 | ||
626 | if (list_link_active(&svd->vdev_dirty_node)) { | |
627 | vdev_config_clean(svd); | |
628 | vdev_config_dirty(tvd); | |
629 | } | |
630 | ||
631 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; | |
632 | svd->vdev_deflate_ratio = 0; | |
633 | ||
634 | tvd->vdev_islog = svd->vdev_islog; | |
635 | svd->vdev_islog = 0; | |
636 | } | |
637 | ||
638 | static void | |
639 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
640 | { | |
641 | int c; | |
642 | ||
643 | if (vd == NULL) | |
644 | return; | |
645 | ||
646 | vd->vdev_top = tvd; | |
647 | ||
648 | for (c = 0; c < vd->vdev_children; c++) | |
649 | vdev_top_update(tvd, vd->vdev_child[c]); | |
650 | } | |
651 | ||
652 | /* | |
653 | * Add a mirror/replacing vdev above an existing vdev. | |
654 | */ | |
655 | vdev_t * | |
656 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
657 | { | |
658 | spa_t *spa = cvd->vdev_spa; | |
659 | vdev_t *pvd = cvd->vdev_parent; | |
660 | vdev_t *mvd; | |
661 | ||
662 | ASSERT(spa_config_held(spa, RW_WRITER)); | |
663 | ||
664 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
665 | ||
666 | mvd->vdev_asize = cvd->vdev_asize; | |
667 | mvd->vdev_ashift = cvd->vdev_ashift; | |
668 | mvd->vdev_state = cvd->vdev_state; | |
669 | ||
670 | vdev_remove_child(pvd, cvd); | |
671 | vdev_add_child(pvd, mvd); | |
672 | cvd->vdev_id = mvd->vdev_children; | |
673 | vdev_add_child(mvd, cvd); | |
674 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
675 | ||
676 | if (mvd == mvd->vdev_top) | |
677 | vdev_top_transfer(cvd, mvd); | |
678 | ||
679 | return (mvd); | |
680 | } | |
681 | ||
682 | /* | |
683 | * Remove a 1-way mirror/replacing vdev from the tree. | |
684 | */ | |
685 | void | |
686 | vdev_remove_parent(vdev_t *cvd) | |
687 | { | |
688 | vdev_t *mvd = cvd->vdev_parent; | |
689 | vdev_t *pvd = mvd->vdev_parent; | |
690 | ||
691 | ASSERT(spa_config_held(cvd->vdev_spa, RW_WRITER)); | |
692 | ||
693 | ASSERT(mvd->vdev_children == 1); | |
694 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
695 | mvd->vdev_ops == &vdev_replacing_ops || | |
696 | mvd->vdev_ops == &vdev_spare_ops); | |
697 | cvd->vdev_ashift = mvd->vdev_ashift; | |
698 | ||
699 | vdev_remove_child(mvd, cvd); | |
700 | vdev_remove_child(pvd, mvd); | |
701 | cvd->vdev_id = mvd->vdev_id; | |
702 | vdev_add_child(pvd, cvd); | |
703 | /* | |
704 | * If we created a new toplevel vdev, then we need to change the child's | |
705 | * vdev GUID to match the old toplevel vdev. Otherwise, we could have | |
706 | * detached an offline device, and when we go to import the pool we'll | |
707 | * think we have two toplevel vdevs, instead of a different version of | |
708 | * the same toplevel vdev. | |
709 | */ | |
710 | if (cvd->vdev_top == cvd) { | |
711 | pvd->vdev_guid_sum -= cvd->vdev_guid; | |
712 | cvd->vdev_guid_sum -= cvd->vdev_guid; | |
713 | cvd->vdev_guid = mvd->vdev_guid; | |
714 | cvd->vdev_guid_sum += mvd->vdev_guid; | |
715 | pvd->vdev_guid_sum += cvd->vdev_guid; | |
716 | } | |
717 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
718 | ||
719 | if (cvd == cvd->vdev_top) | |
720 | vdev_top_transfer(mvd, cvd); | |
721 | ||
722 | ASSERT(mvd->vdev_children == 0); | |
723 | vdev_free(mvd); | |
724 | } | |
725 | ||
726 | int | |
727 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
728 | { | |
729 | spa_t *spa = vd->vdev_spa; | |
730 | objset_t *mos = spa->spa_meta_objset; | |
731 | metaslab_class_t *mc; | |
732 | uint64_t m; | |
733 | uint64_t oldc = vd->vdev_ms_count; | |
734 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
735 | metaslab_t **mspp; | |
736 | int error; | |
737 | ||
738 | if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ | |
739 | return (0); | |
740 | ||
741 | dprintf("%s oldc %llu newc %llu\n", vdev_description(vd), oldc, newc); | |
742 | ||
743 | ASSERT(oldc <= newc); | |
744 | ||
745 | if (vd->vdev_islog) | |
746 | mc = spa->spa_log_class; | |
747 | else | |
748 | mc = spa->spa_normal_class; | |
749 | ||
750 | if (vd->vdev_mg == NULL) | |
751 | vd->vdev_mg = metaslab_group_create(mc, vd); | |
752 | ||
753 | mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); | |
754 | ||
755 | if (oldc != 0) { | |
756 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
757 | kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); | |
758 | } | |
759 | ||
760 | vd->vdev_ms = mspp; | |
761 | vd->vdev_ms_count = newc; | |
762 | ||
763 | for (m = oldc; m < newc; m++) { | |
764 | space_map_obj_t smo = { 0, 0, 0 }; | |
765 | if (txg == 0) { | |
766 | uint64_t object = 0; | |
767 | error = dmu_read(mos, vd->vdev_ms_array, | |
768 | m * sizeof (uint64_t), sizeof (uint64_t), &object); | |
769 | if (error) | |
770 | return (error); | |
771 | if (object != 0) { | |
772 | dmu_buf_t *db; | |
773 | error = dmu_bonus_hold(mos, object, FTAG, &db); | |
774 | if (error) | |
775 | return (error); | |
776 | ASSERT3U(db->db_size, >=, sizeof (smo)); | |
777 | bcopy(db->db_data, &smo, sizeof (smo)); | |
778 | ASSERT3U(smo.smo_object, ==, object); | |
779 | dmu_buf_rele(db, FTAG); | |
780 | } | |
781 | } | |
782 | vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, | |
783 | m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); | |
784 | } | |
785 | ||
786 | return (0); | |
787 | } | |
788 | ||
789 | void | |
790 | vdev_metaslab_fini(vdev_t *vd) | |
791 | { | |
792 | uint64_t m; | |
793 | uint64_t count = vd->vdev_ms_count; | |
794 | ||
795 | if (vd->vdev_ms != NULL) { | |
796 | for (m = 0; m < count; m++) | |
797 | if (vd->vdev_ms[m] != NULL) | |
798 | metaslab_fini(vd->vdev_ms[m]); | |
799 | kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); | |
800 | vd->vdev_ms = NULL; | |
801 | } | |
802 | } | |
803 | ||
804 | int | |
805 | vdev_probe(vdev_t *vd) | |
806 | { | |
807 | if (vd == NULL) | |
808 | return (EINVAL); | |
809 | ||
810 | /* | |
811 | * Right now we only support status checks on the leaf vdevs. | |
812 | */ | |
813 | if (vd->vdev_ops->vdev_op_leaf) | |
814 | return (vd->vdev_ops->vdev_op_probe(vd)); | |
815 | ||
816 | return (0); | |
817 | } | |
818 | ||
819 | /* | |
820 | * Prepare a virtual device for access. | |
821 | */ | |
822 | int | |
823 | vdev_open(vdev_t *vd) | |
824 | { | |
825 | int error; | |
826 | int c; | |
827 | uint64_t osize = 0; | |
828 | uint64_t asize, psize; | |
829 | uint64_t ashift = 0; | |
830 | ||
831 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || | |
832 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
833 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
834 | ||
835 | if (vd->vdev_fault_mode == VDEV_FAULT_COUNT) | |
836 | vd->vdev_fault_arg >>= 1; | |
837 | else | |
838 | vd->vdev_fault_mode = VDEV_FAULT_NONE; | |
839 | ||
840 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
841 | ||
842 | if (!vd->vdev_removed && vd->vdev_faulted) { | |
843 | ASSERT(vd->vdev_children == 0); | |
844 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
845 | VDEV_AUX_ERR_EXCEEDED); | |
846 | return (ENXIO); | |
847 | } else if (vd->vdev_offline) { | |
848 | ASSERT(vd->vdev_children == 0); | |
849 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
850 | return (ENXIO); | |
851 | } | |
852 | ||
853 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); | |
854 | ||
855 | if (zio_injection_enabled && error == 0) | |
856 | error = zio_handle_device_injection(vd, ENXIO); | |
857 | ||
858 | if (error) { | |
859 | if (vd->vdev_removed && | |
860 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
861 | vd->vdev_removed = B_FALSE; | |
862 | ||
863 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
864 | vd->vdev_stat.vs_aux); | |
865 | return (error); | |
866 | } | |
867 | ||
868 | vd->vdev_removed = B_FALSE; | |
869 | ||
870 | if (vd->vdev_degraded) { | |
871 | ASSERT(vd->vdev_children == 0); | |
872 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
873 | VDEV_AUX_ERR_EXCEEDED); | |
874 | } else { | |
875 | vd->vdev_state = VDEV_STATE_HEALTHY; | |
876 | } | |
877 | ||
878 | for (c = 0; c < vd->vdev_children; c++) | |
879 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { | |
880 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
881 | VDEV_AUX_NONE); | |
882 | break; | |
883 | } | |
884 | ||
885 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
886 | ||
887 | if (vd->vdev_children == 0) { | |
888 | if (osize < SPA_MINDEVSIZE) { | |
889 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
890 | VDEV_AUX_TOO_SMALL); | |
891 | return (EOVERFLOW); | |
892 | } | |
893 | psize = osize; | |
894 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
895 | } else { | |
896 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
897 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
898 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
899 | VDEV_AUX_TOO_SMALL); | |
900 | return (EOVERFLOW); | |
901 | } | |
902 | psize = 0; | |
903 | asize = osize; | |
904 | } | |
905 | ||
906 | vd->vdev_psize = psize; | |
907 | ||
908 | if (vd->vdev_asize == 0) { | |
909 | /* | |
910 | * This is the first-ever open, so use the computed values. | |
911 | * For testing purposes, a higher ashift can be requested. | |
912 | */ | |
913 | vd->vdev_asize = asize; | |
914 | vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); | |
915 | } else { | |
916 | /* | |
917 | * Make sure the alignment requirement hasn't increased. | |
918 | */ | |
919 | if (ashift > vd->vdev_top->vdev_ashift) { | |
920 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
921 | VDEV_AUX_BAD_LABEL); | |
922 | return (EINVAL); | |
923 | } | |
924 | ||
925 | /* | |
926 | * Make sure the device hasn't shrunk. | |
927 | */ | |
928 | if (asize < vd->vdev_asize) { | |
929 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
930 | VDEV_AUX_BAD_LABEL); | |
931 | return (EINVAL); | |
932 | } | |
933 | ||
934 | /* | |
935 | * If all children are healthy and the asize has increased, | |
936 | * then we've experienced dynamic LUN growth. | |
937 | */ | |
938 | if (vd->vdev_state == VDEV_STATE_HEALTHY && | |
939 | asize > vd->vdev_asize) { | |
940 | vd->vdev_asize = asize; | |
941 | } | |
942 | } | |
943 | ||
944 | /* | |
945 | * Ensure we can issue some IO before declaring the | |
946 | * vdev open for business. | |
947 | */ | |
948 | error = vdev_probe(vd); | |
949 | if (error) { | |
950 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
951 | VDEV_AUX_OPEN_FAILED); | |
952 | return (error); | |
953 | } | |
954 | ||
955 | /* | |
956 | * If this is a top-level vdev, compute the raidz-deflation | |
957 | * ratio. Note, we hard-code in 128k (1<<17) because it is the | |
958 | * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE | |
959 | * changes, this algorithm must never change, or we will | |
960 | * inconsistently account for existing bp's. | |
961 | */ | |
962 | if (vd->vdev_top == vd) { | |
963 | vd->vdev_deflate_ratio = (1<<17) / | |
964 | (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); | |
965 | } | |
966 | ||
967 | /* | |
968 | * This allows the ZFS DE to close cases appropriately. If a device | |
969 | * goes away and later returns, we want to close the associated case. | |
970 | * But it's not enough to simply post this only when a device goes from | |
971 | * CANT_OPEN -> HEALTHY. If we reboot the system and the device is | |
972 | * back, we also need to close the case (otherwise we will try to replay | |
973 | * it). So we have to post this notifier every time. Since this only | |
974 | * occurs during pool open or error recovery, this should not be an | |
975 | * issue. | |
976 | */ | |
977 | zfs_post_ok(vd->vdev_spa, vd); | |
978 | ||
979 | return (0); | |
980 | } | |
981 | ||
982 | /* | |
983 | * Called once the vdevs are all opened, this routine validates the label | |
984 | * contents. This needs to be done before vdev_load() so that we don't | |
985 | * inadvertently do repair I/Os to the wrong device. | |
986 | * | |
987 | * This function will only return failure if one of the vdevs indicates that it | |
988 | * has since been destroyed or exported. This is only possible if | |
989 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
990 | * will be updated but the function will return 0. | |
991 | */ | |
992 | int | |
993 | vdev_validate(vdev_t *vd) | |
994 | { | |
995 | spa_t *spa = vd->vdev_spa; | |
996 | int c; | |
997 | nvlist_t *label; | |
998 | uint64_t guid; | |
999 | uint64_t state; | |
1000 | ||
1001 | for (c = 0; c < vd->vdev_children; c++) | |
1002 | if (vdev_validate(vd->vdev_child[c]) != 0) | |
1003 | return (EBADF); | |
1004 | ||
1005 | /* | |
1006 | * If the device has already failed, or was marked offline, don't do | |
1007 | * any further validation. Otherwise, label I/O will fail and we will | |
1008 | * overwrite the previous state. | |
1009 | */ | |
1010 | if (vd->vdev_ops->vdev_op_leaf && !vdev_is_dead(vd)) { | |
1011 | ||
1012 | if ((label = vdev_label_read_config(vd)) == NULL) { | |
1013 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1014 | VDEV_AUX_BAD_LABEL); | |
1015 | return (0); | |
1016 | } | |
1017 | ||
1018 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, | |
1019 | &guid) != 0 || guid != spa_guid(spa)) { | |
1020 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1021 | VDEV_AUX_CORRUPT_DATA); | |
1022 | nvlist_free(label); | |
1023 | return (0); | |
1024 | } | |
1025 | ||
1026 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, | |
1027 | &guid) != 0 || guid != vd->vdev_guid) { | |
1028 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1029 | VDEV_AUX_CORRUPT_DATA); | |
1030 | nvlist_free(label); | |
1031 | return (0); | |
1032 | } | |
1033 | ||
1034 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1035 | &state) != 0) { | |
1036 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1037 | VDEV_AUX_CORRUPT_DATA); | |
1038 | nvlist_free(label); | |
1039 | return (0); | |
1040 | } | |
1041 | ||
1042 | nvlist_free(label); | |
1043 | ||
1044 | if (spa->spa_load_state == SPA_LOAD_OPEN && | |
1045 | state != POOL_STATE_ACTIVE) | |
1046 | return (EBADF); | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * If we were able to open and validate a vdev that was previously | |
1051 | * marked permanently unavailable, clear that state now. | |
1052 | */ | |
1053 | if (vd->vdev_not_present) | |
1054 | vd->vdev_not_present = 0; | |
1055 | ||
1056 | return (0); | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * Close a virtual device. | |
1061 | */ | |
1062 | void | |
1063 | vdev_close(vdev_t *vd) | |
1064 | { | |
1065 | vd->vdev_ops->vdev_op_close(vd); | |
1066 | ||
1067 | vdev_cache_purge(vd); | |
1068 | ||
1069 | /* | |
1070 | * We record the previous state before we close it, so that if we are | |
1071 | * doing a reopen(), we don't generate FMA ereports if we notice that | |
1072 | * it's still faulted. | |
1073 | */ | |
1074 | vd->vdev_prevstate = vd->vdev_state; | |
1075 | ||
1076 | if (vd->vdev_offline) | |
1077 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
1078 | else | |
1079 | vd->vdev_state = VDEV_STATE_CLOSED; | |
1080 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1081 | } | |
1082 | ||
1083 | void | |
1084 | vdev_reopen(vdev_t *vd) | |
1085 | { | |
1086 | spa_t *spa = vd->vdev_spa; | |
1087 | ||
1088 | ASSERT(spa_config_held(spa, RW_WRITER)); | |
1089 | ||
1090 | vdev_close(vd); | |
1091 | (void) vdev_open(vd); | |
1092 | ||
1093 | /* | |
1094 | * Call vdev_validate() here to make sure we have the same device. | |
1095 | * Otherwise, a device with an invalid label could be successfully | |
1096 | * opened in response to vdev_reopen(). | |
1097 | */ | |
1098 | (void) vdev_validate(vd); | |
1099 | ||
1100 | /* | |
1101 | * Reassess parent vdev's health. | |
1102 | */ | |
1103 | vdev_propagate_state(vd); | |
1104 | } | |
1105 | ||
1106 | int | |
1107 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
1108 | { | |
1109 | int error; | |
1110 | ||
1111 | /* | |
1112 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
1113 | * For a create, however, we want to fail the request if | |
1114 | * there are any components we can't open. | |
1115 | */ | |
1116 | error = vdev_open(vd); | |
1117 | ||
1118 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
1119 | vdev_close(vd); | |
1120 | return (error ? error : ENXIO); | |
1121 | } | |
1122 | ||
1123 | /* | |
1124 | * Recursively initialize all labels. | |
1125 | */ | |
1126 | if ((error = vdev_label_init(vd, txg, isreplacing ? | |
1127 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { | |
1128 | vdev_close(vd); | |
1129 | return (error); | |
1130 | } | |
1131 | ||
1132 | return (0); | |
1133 | } | |
1134 | ||
1135 | /* | |
1136 | * The is the latter half of vdev_create(). It is distinct because it | |
1137 | * involves initiating transactions in order to do metaslab creation. | |
1138 | * For creation, we want to try to create all vdevs at once and then undo it | |
1139 | * if anything fails; this is much harder if we have pending transactions. | |
1140 | */ | |
1141 | void | |
1142 | vdev_init(vdev_t *vd, uint64_t txg) | |
1143 | { | |
1144 | /* | |
1145 | * Aim for roughly 200 metaslabs per vdev. | |
1146 | */ | |
1147 | vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); | |
1148 | vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); | |
1149 | ||
1150 | /* | |
1151 | * Initialize the vdev's metaslabs. This can't fail because | |
1152 | * there's nothing to read when creating all new metaslabs. | |
1153 | */ | |
1154 | VERIFY(vdev_metaslab_init(vd, txg) == 0); | |
1155 | } | |
1156 | ||
1157 | void | |
1158 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
1159 | { | |
1160 | ASSERT(vd == vd->vdev_top); | |
1161 | ASSERT(ISP2(flags)); | |
1162 | ||
1163 | if (flags & VDD_METASLAB) | |
1164 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
1165 | ||
1166 | if (flags & VDD_DTL) | |
1167 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
1168 | ||
1169 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
1170 | } | |
1171 | ||
1172 | void | |
1173 | vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size) | |
1174 | { | |
1175 | mutex_enter(sm->sm_lock); | |
1176 | if (!space_map_contains(sm, txg, size)) | |
1177 | space_map_add(sm, txg, size); | |
1178 | mutex_exit(sm->sm_lock); | |
1179 | } | |
1180 | ||
1181 | int | |
1182 | vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size) | |
1183 | { | |
1184 | int dirty; | |
1185 | ||
1186 | /* | |
1187 | * Quick test without the lock -- covers the common case that | |
1188 | * there are no dirty time segments. | |
1189 | */ | |
1190 | if (sm->sm_space == 0) | |
1191 | return (0); | |
1192 | ||
1193 | mutex_enter(sm->sm_lock); | |
1194 | dirty = space_map_contains(sm, txg, size); | |
1195 | mutex_exit(sm->sm_lock); | |
1196 | ||
1197 | return (dirty); | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * Reassess DTLs after a config change or scrub completion. | |
1202 | */ | |
1203 | void | |
1204 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
1205 | { | |
1206 | spa_t *spa = vd->vdev_spa; | |
1207 | int c; | |
1208 | ||
1209 | ASSERT(spa_config_held(spa, RW_WRITER)); | |
1210 | ||
1211 | if (vd->vdev_children == 0) { | |
1212 | mutex_enter(&vd->vdev_dtl_lock); | |
1213 | /* | |
1214 | * We're successfully scrubbed everything up to scrub_txg. | |
1215 | * Therefore, excise all old DTLs up to that point, then | |
1216 | * fold in the DTLs for everything we couldn't scrub. | |
1217 | */ | |
1218 | if (scrub_txg != 0) { | |
1219 | space_map_excise(&vd->vdev_dtl_map, 0, scrub_txg); | |
1220 | space_map_union(&vd->vdev_dtl_map, &vd->vdev_dtl_scrub); | |
1221 | } | |
1222 | if (scrub_done) | |
1223 | space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); | |
1224 | mutex_exit(&vd->vdev_dtl_lock); | |
1225 | if (txg != 0) | |
1226 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
1227 | return; | |
1228 | } | |
1229 | ||
1230 | /* | |
1231 | * Make sure the DTLs are always correct under the scrub lock. | |
1232 | */ | |
1233 | if (vd == spa->spa_root_vdev) | |
1234 | mutex_enter(&spa->spa_scrub_lock); | |
1235 | ||
1236 | mutex_enter(&vd->vdev_dtl_lock); | |
1237 | space_map_vacate(&vd->vdev_dtl_map, NULL, NULL); | |
1238 | space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); | |
1239 | mutex_exit(&vd->vdev_dtl_lock); | |
1240 | ||
1241 | for (c = 0; c < vd->vdev_children; c++) { | |
1242 | vdev_t *cvd = vd->vdev_child[c]; | |
1243 | vdev_dtl_reassess(cvd, txg, scrub_txg, scrub_done); | |
1244 | mutex_enter(&vd->vdev_dtl_lock); | |
1245 | space_map_union(&vd->vdev_dtl_map, &cvd->vdev_dtl_map); | |
1246 | space_map_union(&vd->vdev_dtl_scrub, &cvd->vdev_dtl_scrub); | |
1247 | mutex_exit(&vd->vdev_dtl_lock); | |
1248 | } | |
1249 | ||
1250 | if (vd == spa->spa_root_vdev) | |
1251 | mutex_exit(&spa->spa_scrub_lock); | |
1252 | } | |
1253 | ||
1254 | static int | |
1255 | vdev_dtl_load(vdev_t *vd) | |
1256 | { | |
1257 | spa_t *spa = vd->vdev_spa; | |
1258 | space_map_obj_t *smo = &vd->vdev_dtl; | |
1259 | objset_t *mos = spa->spa_meta_objset; | |
1260 | dmu_buf_t *db; | |
1261 | int error; | |
1262 | ||
1263 | ASSERT(vd->vdev_children == 0); | |
1264 | ||
1265 | if (smo->smo_object == 0) | |
1266 | return (0); | |
1267 | ||
1268 | if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) | |
1269 | return (error); | |
1270 | ||
1271 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1272 | bcopy(db->db_data, smo, sizeof (*smo)); | |
1273 | dmu_buf_rele(db, FTAG); | |
1274 | ||
1275 | mutex_enter(&vd->vdev_dtl_lock); | |
1276 | error = space_map_load(&vd->vdev_dtl_map, NULL, SM_ALLOC, smo, mos); | |
1277 | mutex_exit(&vd->vdev_dtl_lock); | |
1278 | ||
1279 | return (error); | |
1280 | } | |
1281 | ||
1282 | void | |
1283 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
1284 | { | |
1285 | spa_t *spa = vd->vdev_spa; | |
1286 | space_map_obj_t *smo = &vd->vdev_dtl; | |
1287 | space_map_t *sm = &vd->vdev_dtl_map; | |
1288 | objset_t *mos = spa->spa_meta_objset; | |
1289 | space_map_t smsync; | |
1290 | kmutex_t smlock; | |
1291 | dmu_buf_t *db; | |
1292 | dmu_tx_t *tx; | |
1293 | ||
1294 | dprintf("%s in txg %llu pass %d\n", | |
1295 | vdev_description(vd), (u_longlong_t)txg, spa_sync_pass(spa)); | |
1296 | ||
1297 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1298 | ||
1299 | if (vd->vdev_detached) { | |
1300 | if (smo->smo_object != 0) { | |
1301 | int err = dmu_object_free(mos, smo->smo_object, tx); | |
1302 | ASSERT3U(err, ==, 0); | |
1303 | smo->smo_object = 0; | |
1304 | } | |
1305 | dmu_tx_commit(tx); | |
1306 | dprintf("detach %s committed in txg %llu\n", | |
1307 | vdev_description(vd), txg); | |
1308 | return; | |
1309 | } | |
1310 | ||
1311 | if (smo->smo_object == 0) { | |
1312 | ASSERT(smo->smo_objsize == 0); | |
1313 | ASSERT(smo->smo_alloc == 0); | |
1314 | smo->smo_object = dmu_object_alloc(mos, | |
1315 | DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, | |
1316 | DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); | |
1317 | ASSERT(smo->smo_object != 0); | |
1318 | vdev_config_dirty(vd->vdev_top); | |
1319 | } | |
1320 | ||
1321 | mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); | |
1322 | ||
1323 | space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, | |
1324 | &smlock); | |
1325 | ||
1326 | mutex_enter(&smlock); | |
1327 | ||
1328 | mutex_enter(&vd->vdev_dtl_lock); | |
1329 | space_map_walk(sm, space_map_add, &smsync); | |
1330 | mutex_exit(&vd->vdev_dtl_lock); | |
1331 | ||
1332 | space_map_truncate(smo, mos, tx); | |
1333 | space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); | |
1334 | ||
1335 | space_map_destroy(&smsync); | |
1336 | ||
1337 | mutex_exit(&smlock); | |
1338 | mutex_destroy(&smlock); | |
1339 | ||
1340 | VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); | |
1341 | dmu_buf_will_dirty(db, tx); | |
1342 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1343 | bcopy(smo, db->db_data, sizeof (*smo)); | |
1344 | dmu_buf_rele(db, FTAG); | |
1345 | ||
1346 | dmu_tx_commit(tx); | |
1347 | } | |
1348 | ||
1349 | void | |
1350 | vdev_load(vdev_t *vd) | |
1351 | { | |
1352 | int c; | |
1353 | ||
1354 | /* | |
1355 | * Recursively load all children. | |
1356 | */ | |
1357 | for (c = 0; c < vd->vdev_children; c++) | |
1358 | vdev_load(vd->vdev_child[c]); | |
1359 | ||
1360 | /* | |
1361 | * If this is a top-level vdev, initialize its metaslabs. | |
1362 | */ | |
1363 | if (vd == vd->vdev_top && | |
1364 | (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || | |
1365 | vdev_metaslab_init(vd, 0) != 0)) | |
1366 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1367 | VDEV_AUX_CORRUPT_DATA); | |
1368 | ||
1369 | /* | |
1370 | * If this is a leaf vdev, load its DTL. | |
1371 | */ | |
1372 | if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) | |
1373 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1374 | VDEV_AUX_CORRUPT_DATA); | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * The special vdev case is used for hot spares and l2cache devices. Its | |
1379 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
1380 | * we make sure that we can open the underlying device, then try to read the | |
1381 | * label, and make sure that the label is sane and that it hasn't been | |
1382 | * repurposed to another pool. | |
1383 | */ | |
1384 | int | |
1385 | vdev_validate_aux(vdev_t *vd) | |
1386 | { | |
1387 | nvlist_t *label; | |
1388 | uint64_t guid, version; | |
1389 | uint64_t state; | |
1390 | ||
1391 | if ((label = vdev_label_read_config(vd)) == NULL) { | |
1392 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1393 | VDEV_AUX_CORRUPT_DATA); | |
1394 | return (-1); | |
1395 | } | |
1396 | ||
1397 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
1398 | version > SPA_VERSION || | |
1399 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || | |
1400 | guid != vd->vdev_guid || | |
1401 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
1402 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1403 | VDEV_AUX_CORRUPT_DATA); | |
1404 | nvlist_free(label); | |
1405 | return (-1); | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * We don't actually check the pool state here. If it's in fact in | |
1410 | * use by another pool, we update this fact on the fly when requested. | |
1411 | */ | |
1412 | nvlist_free(label); | |
1413 | return (0); | |
1414 | } | |
1415 | ||
1416 | void | |
1417 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
1418 | { | |
1419 | metaslab_t *msp; | |
1420 | ||
1421 | dprintf("%s txg %llu\n", vdev_description(vd), txg); | |
1422 | ||
1423 | while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) | |
1424 | metaslab_sync_done(msp, txg); | |
1425 | } | |
1426 | ||
1427 | void | |
1428 | vdev_sync(vdev_t *vd, uint64_t txg) | |
1429 | { | |
1430 | spa_t *spa = vd->vdev_spa; | |
1431 | vdev_t *lvd; | |
1432 | metaslab_t *msp; | |
1433 | dmu_tx_t *tx; | |
1434 | ||
1435 | dprintf("%s txg %llu pass %d\n", | |
1436 | vdev_description(vd), (u_longlong_t)txg, spa_sync_pass(spa)); | |
1437 | ||
1438 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { | |
1439 | ASSERT(vd == vd->vdev_top); | |
1440 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1441 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
1442 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
1443 | ASSERT(vd->vdev_ms_array != 0); | |
1444 | vdev_config_dirty(vd); | |
1445 | dmu_tx_commit(tx); | |
1446 | } | |
1447 | ||
1448 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { | |
1449 | metaslab_sync(msp, txg); | |
1450 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
1451 | } | |
1452 | ||
1453 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
1454 | vdev_dtl_sync(lvd, txg); | |
1455 | ||
1456 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); | |
1457 | } | |
1458 | ||
1459 | uint64_t | |
1460 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
1461 | { | |
1462 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
1463 | } | |
1464 | ||
1465 | const char * | |
1466 | vdev_description(vdev_t *vd) | |
1467 | { | |
1468 | if (vd == NULL || vd->vdev_ops == NULL) | |
1469 | return ("<unknown>"); | |
1470 | ||
1471 | if (vd->vdev_path != NULL) | |
1472 | return (vd->vdev_path); | |
1473 | ||
1474 | if (vd->vdev_parent == NULL) | |
1475 | return (spa_name(vd->vdev_spa)); | |
1476 | ||
1477 | return (vd->vdev_ops->vdev_op_type); | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
1482 | * not be opened, and no I/O is attempted. | |
1483 | */ | |
1484 | int | |
1485 | vdev_fault(spa_t *spa, uint64_t guid) | |
1486 | { | |
1487 | vdev_t *rvd, *vd; | |
1488 | uint64_t txg; | |
1489 | ||
1490 | /* | |
1491 | * Disregard a vdev fault request if the pool has | |
1492 | * experienced a complete failure. | |
1493 | * | |
1494 | * XXX - We do this here so that we don't hold the | |
1495 | * spa_namespace_lock in the event that we can't get | |
1496 | * the RW_WRITER spa_config_lock. | |
1497 | */ | |
1498 | if (spa_state(spa) == POOL_STATE_IO_FAILURE) | |
1499 | return (EIO); | |
1500 | ||
1501 | txg = spa_vdev_enter(spa); | |
1502 | ||
1503 | rvd = spa->spa_root_vdev; | |
1504 | ||
1505 | if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) | |
1506 | return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
1507 | if (!vd->vdev_ops->vdev_op_leaf) | |
1508 | return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
1509 | ||
1510 | /* | |
1511 | * Faulted state takes precedence over degraded. | |
1512 | */ | |
1513 | vd->vdev_faulted = 1ULL; | |
1514 | vd->vdev_degraded = 0ULL; | |
1515 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, | |
1516 | VDEV_AUX_ERR_EXCEEDED); | |
1517 | ||
1518 | /* | |
1519 | * If marking the vdev as faulted cause the toplevel vdev to become | |
1520 | * unavailable, then back off and simply mark the vdev as degraded | |
1521 | * instead. | |
1522 | */ | |
1523 | if (vdev_is_dead(vd->vdev_top)) { | |
1524 | vd->vdev_degraded = 1ULL; | |
1525 | vd->vdev_faulted = 0ULL; | |
1526 | ||
1527 | /* | |
1528 | * If we reopen the device and it's not dead, only then do we | |
1529 | * mark it degraded. | |
1530 | */ | |
1531 | vdev_reopen(vd); | |
1532 | ||
1533 | if (vdev_readable(vd)) { | |
1534 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1535 | VDEV_AUX_ERR_EXCEEDED); | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | vdev_config_dirty(vd->vdev_top); | |
1540 | ||
1541 | (void) spa_vdev_exit(spa, NULL, txg, 0); | |
1542 | ||
1543 | return (0); | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
1548 | * user that something is wrong. The vdev continues to operate as normal as far | |
1549 | * as I/O is concerned. | |
1550 | */ | |
1551 | int | |
1552 | vdev_degrade(spa_t *spa, uint64_t guid) | |
1553 | { | |
1554 | vdev_t *rvd, *vd; | |
1555 | uint64_t txg; | |
1556 | ||
1557 | /* | |
1558 | * Disregard a vdev fault request if the pool has | |
1559 | * experienced a complete failure. | |
1560 | * | |
1561 | * XXX - We do this here so that we don't hold the | |
1562 | * spa_namespace_lock in the event that we can't get | |
1563 | * the RW_WRITER spa_config_lock. | |
1564 | */ | |
1565 | if (spa_state(spa) == POOL_STATE_IO_FAILURE) | |
1566 | return (EIO); | |
1567 | ||
1568 | txg = spa_vdev_enter(spa); | |
1569 | ||
1570 | rvd = spa->spa_root_vdev; | |
1571 | ||
1572 | if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) | |
1573 | return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
1574 | if (!vd->vdev_ops->vdev_op_leaf) | |
1575 | return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
1576 | ||
1577 | /* | |
1578 | * If the vdev is already faulted, then don't do anything. | |
1579 | */ | |
1580 | if (vd->vdev_faulted || vd->vdev_degraded) { | |
1581 | (void) spa_vdev_exit(spa, NULL, txg, 0); | |
1582 | return (0); | |
1583 | } | |
1584 | ||
1585 | vd->vdev_degraded = 1ULL; | |
1586 | if (!vdev_is_dead(vd)) | |
1587 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1588 | VDEV_AUX_ERR_EXCEEDED); | |
1589 | vdev_config_dirty(vd->vdev_top); | |
1590 | ||
1591 | (void) spa_vdev_exit(spa, NULL, txg, 0); | |
1592 | ||
1593 | return (0); | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * Online the given vdev. If 'unspare' is set, it implies two things. First, | |
1598 | * any attached spare device should be detached when the device finishes | |
1599 | * resilvering. Second, the online should be treated like a 'test' online case, | |
1600 | * so no FMA events are generated if the device fails to open. | |
1601 | */ | |
1602 | int | |
1603 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, | |
1604 | vdev_state_t *newstate) | |
1605 | { | |
1606 | vdev_t *rvd, *vd; | |
1607 | uint64_t txg; | |
1608 | ||
1609 | /* | |
1610 | * Disregard a vdev fault request if the pool has | |
1611 | * experienced a complete failure. | |
1612 | * | |
1613 | * XXX - We do this here so that we don't hold the | |
1614 | * spa_namespace_lock in the event that we can't get | |
1615 | * the RW_WRITER spa_config_lock. | |
1616 | */ | |
1617 | if (spa_state(spa) == POOL_STATE_IO_FAILURE) | |
1618 | return (EIO); | |
1619 | ||
1620 | txg = spa_vdev_enter(spa); | |
1621 | ||
1622 | rvd = spa->spa_root_vdev; | |
1623 | ||
1624 | if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) | |
1625 | return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
1626 | ||
1627 | if (!vd->vdev_ops->vdev_op_leaf) | |
1628 | return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
1629 | ||
1630 | vd->vdev_offline = B_FALSE; | |
1631 | vd->vdev_tmpoffline = B_FALSE; | |
1632 | vd->vdev_checkremove = (flags & ZFS_ONLINE_CHECKREMOVE) ? | |
1633 | B_TRUE : B_FALSE; | |
1634 | vd->vdev_forcefault = (flags & ZFS_ONLINE_FORCEFAULT) ? | |
1635 | B_TRUE : B_FALSE; | |
1636 | vdev_reopen(vd->vdev_top); | |
1637 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; | |
1638 | ||
1639 | if (newstate) | |
1640 | *newstate = vd->vdev_state; | |
1641 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
1642 | !vdev_is_dead(vd) && vd->vdev_parent && | |
1643 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
1644 | vd->vdev_parent->vdev_child[0] == vd) | |
1645 | vd->vdev_unspare = B_TRUE; | |
1646 | ||
1647 | vdev_config_dirty(vd->vdev_top); | |
1648 | ||
1649 | (void) spa_vdev_exit(spa, NULL, txg, 0); | |
1650 | ||
1651 | /* | |
1652 | * Must hold spa_namespace_lock in order to post resilver sysevent | |
1653 | * w/pool name. | |
1654 | */ | |
1655 | mutex_enter(&spa_namespace_lock); | |
1656 | VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
1657 | mutex_exit(&spa_namespace_lock); | |
1658 | ||
1659 | return (0); | |
1660 | } | |
1661 | ||
1662 | int | |
1663 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
1664 | { | |
1665 | vdev_t *rvd, *vd; | |
1666 | uint64_t txg; | |
1667 | ||
1668 | /* | |
1669 | * Disregard a vdev fault request if the pool has | |
1670 | * experienced a complete failure. | |
1671 | * | |
1672 | * XXX - We do this here so that we don't hold the | |
1673 | * spa_namespace_lock in the event that we can't get | |
1674 | * the RW_WRITER spa_config_lock. | |
1675 | */ | |
1676 | if (spa_state(spa) == POOL_STATE_IO_FAILURE) | |
1677 | return (EIO); | |
1678 | ||
1679 | txg = spa_vdev_enter(spa); | |
1680 | ||
1681 | rvd = spa->spa_root_vdev; | |
1682 | ||
1683 | if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) | |
1684 | return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
1685 | ||
1686 | if (!vd->vdev_ops->vdev_op_leaf) | |
1687 | return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
1688 | ||
1689 | /* | |
1690 | * If the device isn't already offline, try to offline it. | |
1691 | */ | |
1692 | if (!vd->vdev_offline) { | |
1693 | /* | |
1694 | * If this device's top-level vdev has a non-empty DTL, | |
1695 | * don't allow the device to be offlined. | |
1696 | * | |
1697 | * XXX -- make this more precise by allowing the offline | |
1698 | * as long as the remaining devices don't have any DTL holes. | |
1699 | */ | |
1700 | if (vd->vdev_top->vdev_dtl_map.sm_space != 0) | |
1701 | return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
1702 | ||
1703 | /* | |
1704 | * Offline this device and reopen its top-level vdev. | |
1705 | * If this action results in the top-level vdev becoming | |
1706 | * unusable, undo it and fail the request. | |
1707 | */ | |
1708 | vd->vdev_offline = B_TRUE; | |
1709 | vdev_reopen(vd->vdev_top); | |
1710 | if (vdev_is_dead(vd->vdev_top)) { | |
1711 | vd->vdev_offline = B_FALSE; | |
1712 | vdev_reopen(vd->vdev_top); | |
1713 | return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | vd->vdev_tmpoffline = (flags & ZFS_OFFLINE_TEMPORARY) ? | |
1718 | B_TRUE : B_FALSE; | |
1719 | ||
1720 | vdev_config_dirty(vd->vdev_top); | |
1721 | ||
1722 | return (spa_vdev_exit(spa, NULL, txg, 0)); | |
1723 | } | |
1724 | ||
1725 | /* | |
1726 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
1727 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
1728 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
1729 | * If reopen is specified then attempt to reopen the vdev if the vdev is | |
1730 | * faulted or degraded. | |
1731 | */ | |
1732 | void | |
1733 | vdev_clear(spa_t *spa, vdev_t *vd, boolean_t reopen_wanted) | |
1734 | { | |
1735 | int c; | |
1736 | ||
1737 | if (vd == NULL) | |
1738 | vd = spa->spa_root_vdev; | |
1739 | ||
1740 | vd->vdev_stat.vs_read_errors = 0; | |
1741 | vd->vdev_stat.vs_write_errors = 0; | |
1742 | vd->vdev_stat.vs_checksum_errors = 0; | |
1743 | vd->vdev_is_failing = B_FALSE; | |
1744 | ||
1745 | for (c = 0; c < vd->vdev_children; c++) | |
1746 | vdev_clear(spa, vd->vdev_child[c], reopen_wanted); | |
1747 | ||
1748 | /* | |
1749 | * If we're in the FAULTED state, then clear the persistent state and | |
1750 | * attempt to reopen the device. We also mark the vdev config dirty, so | |
1751 | * that the new faulted state is written out to disk. | |
1752 | */ | |
1753 | if (reopen_wanted && (vd->vdev_faulted || vd->vdev_degraded)) { | |
1754 | vd->vdev_faulted = vd->vdev_degraded = 0; | |
1755 | vdev_reopen(vd); | |
1756 | vdev_config_dirty(vd->vdev_top); | |
1757 | ||
1758 | if (vd->vdev_faulted) | |
1759 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
1760 | ||
1761 | spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | int | |
1766 | vdev_readable(vdev_t *vd) | |
1767 | { | |
1768 | /* XXPOLICY */ | |
1769 | return (!vdev_is_dead(vd)); | |
1770 | } | |
1771 | ||
1772 | int | |
1773 | vdev_writeable(vdev_t *vd) | |
1774 | { | |
1775 | return (!vdev_is_dead(vd) && !vd->vdev_is_failing); | |
1776 | } | |
1777 | ||
1778 | int | |
1779 | vdev_is_dead(vdev_t *vd) | |
1780 | { | |
1781 | return (vd->vdev_state < VDEV_STATE_DEGRADED); | |
1782 | } | |
1783 | ||
1784 | int | |
1785 | vdev_error_inject(vdev_t *vd, zio_t *zio) | |
1786 | { | |
1787 | int error = 0; | |
1788 | ||
1789 | if (vd->vdev_fault_mode == VDEV_FAULT_NONE) | |
1790 | return (0); | |
1791 | ||
1792 | if (((1ULL << zio->io_type) & vd->vdev_fault_mask) == 0) | |
1793 | return (0); | |
1794 | ||
1795 | switch (vd->vdev_fault_mode) { | |
1796 | case VDEV_FAULT_RANDOM: | |
1797 | if (spa_get_random(vd->vdev_fault_arg) == 0) | |
1798 | error = EIO; | |
1799 | break; | |
1800 | ||
1801 | case VDEV_FAULT_COUNT: | |
1802 | if ((int64_t)--vd->vdev_fault_arg <= 0) | |
1803 | vd->vdev_fault_mode = VDEV_FAULT_NONE; | |
1804 | error = EIO; | |
1805 | break; | |
1806 | } | |
1807 | ||
1808 | return (error); | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * Get statistics for the given vdev. | |
1813 | */ | |
1814 | void | |
1815 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
1816 | { | |
1817 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
1818 | int c, t; | |
1819 | ||
1820 | mutex_enter(&vd->vdev_stat_lock); | |
1821 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
1822 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; | |
1823 | vs->vs_state = vd->vdev_state; | |
1824 | vs->vs_rsize = vdev_get_rsize(vd); | |
1825 | mutex_exit(&vd->vdev_stat_lock); | |
1826 | ||
1827 | /* | |
1828 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
1829 | * over all top-level vdevs (i.e. the direct children of the root). | |
1830 | */ | |
1831 | if (vd == rvd) { | |
1832 | for (c = 0; c < rvd->vdev_children; c++) { | |
1833 | vdev_t *cvd = rvd->vdev_child[c]; | |
1834 | vdev_stat_t *cvs = &cvd->vdev_stat; | |
1835 | ||
1836 | mutex_enter(&vd->vdev_stat_lock); | |
1837 | for (t = 0; t < ZIO_TYPES; t++) { | |
1838 | vs->vs_ops[t] += cvs->vs_ops[t]; | |
1839 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
1840 | } | |
1841 | vs->vs_read_errors += cvs->vs_read_errors; | |
1842 | vs->vs_write_errors += cvs->vs_write_errors; | |
1843 | vs->vs_checksum_errors += cvs->vs_checksum_errors; | |
1844 | vs->vs_scrub_examined += cvs->vs_scrub_examined; | |
1845 | vs->vs_scrub_errors += cvs->vs_scrub_errors; | |
1846 | mutex_exit(&vd->vdev_stat_lock); | |
1847 | } | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | void | |
1852 | vdev_clear_stats(vdev_t *vd) | |
1853 | { | |
1854 | mutex_enter(&vd->vdev_stat_lock); | |
1855 | vd->vdev_stat.vs_space = 0; | |
1856 | vd->vdev_stat.vs_dspace = 0; | |
1857 | vd->vdev_stat.vs_alloc = 0; | |
1858 | mutex_exit(&vd->vdev_stat_lock); | |
1859 | } | |
1860 | ||
1861 | void | |
1862 | vdev_stat_update(zio_t *zio) | |
1863 | { | |
1864 | vdev_t *vd = zio->io_vd; | |
1865 | vdev_t *pvd; | |
1866 | uint64_t txg = zio->io_txg; | |
1867 | vdev_stat_t *vs = &vd->vdev_stat; | |
1868 | zio_type_t type = zio->io_type; | |
1869 | int flags = zio->io_flags; | |
1870 | ||
1871 | if (zio->io_error == 0) { | |
1872 | if (!(flags & ZIO_FLAG_IO_BYPASS)) { | |
1873 | mutex_enter(&vd->vdev_stat_lock); | |
1874 | vs->vs_ops[type]++; | |
1875 | vs->vs_bytes[type] += zio->io_size; | |
1876 | mutex_exit(&vd->vdev_stat_lock); | |
1877 | } | |
1878 | if ((flags & ZIO_FLAG_IO_REPAIR) && | |
1879 | zio->io_delegate_list == NULL) { | |
1880 | mutex_enter(&vd->vdev_stat_lock); | |
1881 | if (flags & ZIO_FLAG_SCRUB_THREAD) | |
1882 | vs->vs_scrub_repaired += zio->io_size; | |
1883 | else | |
1884 | vs->vs_self_healed += zio->io_size; | |
1885 | mutex_exit(&vd->vdev_stat_lock); | |
1886 | } | |
1887 | return; | |
1888 | } | |
1889 | ||
1890 | if (flags & ZIO_FLAG_SPECULATIVE) | |
1891 | return; | |
1892 | ||
1893 | if (vdev_readable(vd)) { | |
1894 | mutex_enter(&vd->vdev_stat_lock); | |
1895 | if (type == ZIO_TYPE_READ) { | |
1896 | if (zio->io_error == ECKSUM) | |
1897 | vs->vs_checksum_errors++; | |
1898 | else | |
1899 | vs->vs_read_errors++; | |
1900 | } | |
1901 | if (type == ZIO_TYPE_WRITE) | |
1902 | vs->vs_write_errors++; | |
1903 | mutex_exit(&vd->vdev_stat_lock); | |
1904 | } | |
1905 | ||
1906 | if (type == ZIO_TYPE_WRITE) { | |
1907 | if (txg == 0 || vd->vdev_children != 0) | |
1908 | return; | |
1909 | if (flags & ZIO_FLAG_SCRUB_THREAD) { | |
1910 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
1911 | for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) | |
1912 | vdev_dtl_dirty(&pvd->vdev_dtl_scrub, txg, 1); | |
1913 | } | |
1914 | if (!(flags & ZIO_FLAG_IO_REPAIR)) { | |
1915 | if (vdev_dtl_contains(&vd->vdev_dtl_map, txg, 1)) | |
1916 | return; | |
1917 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
1918 | for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) | |
1919 | vdev_dtl_dirty(&pvd->vdev_dtl_map, txg, 1); | |
1920 | } | |
1921 | } | |
1922 | } | |
1923 | ||
1924 | void | |
1925 | vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) | |
1926 | { | |
1927 | int c; | |
1928 | vdev_stat_t *vs = &vd->vdev_stat; | |
1929 | ||
1930 | for (c = 0; c < vd->vdev_children; c++) | |
1931 | vdev_scrub_stat_update(vd->vdev_child[c], type, complete); | |
1932 | ||
1933 | mutex_enter(&vd->vdev_stat_lock); | |
1934 | ||
1935 | if (type == POOL_SCRUB_NONE) { | |
1936 | /* | |
1937 | * Update completion and end time. Leave everything else alone | |
1938 | * so we can report what happened during the previous scrub. | |
1939 | */ | |
1940 | vs->vs_scrub_complete = complete; | |
1941 | vs->vs_scrub_end = gethrestime_sec(); | |
1942 | } else { | |
1943 | vs->vs_scrub_type = type; | |
1944 | vs->vs_scrub_complete = 0; | |
1945 | vs->vs_scrub_examined = 0; | |
1946 | vs->vs_scrub_repaired = 0; | |
1947 | vs->vs_scrub_errors = 0; | |
1948 | vs->vs_scrub_start = gethrestime_sec(); | |
1949 | vs->vs_scrub_end = 0; | |
1950 | } | |
1951 | ||
1952 | mutex_exit(&vd->vdev_stat_lock); | |
1953 | } | |
1954 | ||
1955 | /* | |
1956 | * Update the in-core space usage stats for this vdev and the root vdev. | |
1957 | */ | |
1958 | void | |
1959 | vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta, | |
1960 | boolean_t update_root) | |
1961 | { | |
1962 | int64_t dspace_delta = space_delta; | |
1963 | spa_t *spa = vd->vdev_spa; | |
1964 | vdev_t *rvd = spa->spa_root_vdev; | |
1965 | ||
1966 | ASSERT(vd == vd->vdev_top); | |
1967 | ||
1968 | /* | |
1969 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
1970 | * factor. We must calculate this here and not at the root vdev | |
1971 | * because the root vdev's psize-to-asize is simply the max of its | |
1972 | * childrens', thus not accurate enough for us. | |
1973 | */ | |
1974 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
1975 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * | |
1976 | vd->vdev_deflate_ratio; | |
1977 | ||
1978 | mutex_enter(&vd->vdev_stat_lock); | |
1979 | vd->vdev_stat.vs_space += space_delta; | |
1980 | vd->vdev_stat.vs_alloc += alloc_delta; | |
1981 | vd->vdev_stat.vs_dspace += dspace_delta; | |
1982 | mutex_exit(&vd->vdev_stat_lock); | |
1983 | ||
1984 | if (update_root) { | |
1985 | ASSERT(rvd == vd->vdev_parent); | |
1986 | ASSERT(vd->vdev_ms_count != 0); | |
1987 | ||
1988 | /* | |
1989 | * Don't count non-normal (e.g. intent log) space as part of | |
1990 | * the pool's capacity. | |
1991 | */ | |
1992 | if (vd->vdev_mg->mg_class != spa->spa_normal_class) | |
1993 | return; | |
1994 | ||
1995 | mutex_enter(&rvd->vdev_stat_lock); | |
1996 | rvd->vdev_stat.vs_space += space_delta; | |
1997 | rvd->vdev_stat.vs_alloc += alloc_delta; | |
1998 | rvd->vdev_stat.vs_dspace += dspace_delta; | |
1999 | mutex_exit(&rvd->vdev_stat_lock); | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | /* | |
2004 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
2005 | * so that it will be written out next time the vdev configuration is synced. | |
2006 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
2007 | */ | |
2008 | void | |
2009 | vdev_config_dirty(vdev_t *vd) | |
2010 | { | |
2011 | spa_t *spa = vd->vdev_spa; | |
2012 | vdev_t *rvd = spa->spa_root_vdev; | |
2013 | int c; | |
2014 | ||
2015 | /* | |
2016 | * The dirty list is protected by the config lock. The caller must | |
2017 | * either hold the config lock as writer, or must be the sync thread | |
2018 | * (which holds the lock as reader). There's only one sync thread, | |
2019 | * so this is sufficient to ensure mutual exclusion. | |
2020 | */ | |
2021 | ASSERT(spa_config_held(spa, RW_WRITER) || | |
2022 | dsl_pool_sync_context(spa_get_dsl(spa))); | |
2023 | ||
2024 | if (vd == rvd) { | |
2025 | for (c = 0; c < rvd->vdev_children; c++) | |
2026 | vdev_config_dirty(rvd->vdev_child[c]); | |
2027 | } else { | |
2028 | ASSERT(vd == vd->vdev_top); | |
2029 | ||
2030 | if (!list_link_active(&vd->vdev_dirty_node)) | |
2031 | list_insert_head(&spa->spa_dirty_list, vd); | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | void | |
2036 | vdev_config_clean(vdev_t *vd) | |
2037 | { | |
2038 | spa_t *spa = vd->vdev_spa; | |
2039 | ||
2040 | ASSERT(spa_config_held(spa, RW_WRITER) || | |
2041 | dsl_pool_sync_context(spa_get_dsl(spa))); | |
2042 | ||
2043 | ASSERT(list_link_active(&vd->vdev_dirty_node)); | |
2044 | list_remove(&spa->spa_dirty_list, vd); | |
2045 | } | |
2046 | ||
2047 | void | |
2048 | vdev_propagate_state(vdev_t *vd) | |
2049 | { | |
2050 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
2051 | int degraded = 0, faulted = 0; | |
2052 | int corrupted = 0; | |
2053 | int c; | |
2054 | vdev_t *child; | |
2055 | ||
2056 | if (vd->vdev_children > 0) { | |
2057 | for (c = 0; c < vd->vdev_children; c++) { | |
2058 | child = vd->vdev_child[c]; | |
2059 | if (vdev_is_dead(child) && !vdev_readable(child)) | |
2060 | faulted++; | |
2061 | else if (child->vdev_state <= VDEV_STATE_DEGRADED) | |
2062 | degraded++; | |
2063 | ||
2064 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
2065 | corrupted++; | |
2066 | } | |
2067 | ||
2068 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
2069 | ||
2070 | /* | |
2071 | * Root special: if there is a toplevel vdev that cannot be | |
2072 | * opened due to corrupted metadata, then propagate the root | |
2073 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
2074 | * replicas'. | |
2075 | */ | |
2076 | if (corrupted && vd == rvd && | |
2077 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
2078 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2079 | VDEV_AUX_CORRUPT_DATA); | |
2080 | } | |
2081 | ||
2082 | if (vd->vdev_parent && !vd->vdev_islog) | |
2083 | vdev_propagate_state(vd->vdev_parent); | |
2084 | } | |
2085 | ||
2086 | /* | |
2087 | * Set a vdev's state. If this is during an open, we don't update the parent | |
2088 | * state, because we're in the process of opening children depth-first. | |
2089 | * Otherwise, we propagate the change to the parent. | |
2090 | * | |
2091 | * If this routine places a device in a faulted state, an appropriate ereport is | |
2092 | * generated. | |
2093 | */ | |
2094 | void | |
2095 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
2096 | { | |
2097 | uint64_t save_state; | |
2098 | ||
2099 | if (state == vd->vdev_state) { | |
2100 | vd->vdev_stat.vs_aux = aux; | |
2101 | return; | |
2102 | } | |
2103 | ||
2104 | save_state = vd->vdev_state; | |
2105 | ||
2106 | vd->vdev_state = state; | |
2107 | vd->vdev_stat.vs_aux = aux; | |
2108 | ||
2109 | /* | |
2110 | * If we are setting the vdev state to anything but an open state, then | |
2111 | * always close the underlying device. Otherwise, we keep accessible | |
2112 | * but invalid devices open forever. We don't call vdev_close() itself, | |
2113 | * because that implies some extra checks (offline, etc) that we don't | |
2114 | * want here. This is limited to leaf devices, because otherwise | |
2115 | * closing the device will affect other children. | |
2116 | */ | |
2117 | if (!vdev_readable(vd) && vd->vdev_ops->vdev_op_leaf) | |
2118 | vd->vdev_ops->vdev_op_close(vd); | |
2119 | ||
2120 | if (vd->vdev_removed && | |
2121 | state == VDEV_STATE_CANT_OPEN && | |
2122 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
2123 | /* | |
2124 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
2125 | * device was previously marked removed and someone attempted to | |
2126 | * reopen it. If this failed due to a nonexistent device, then | |
2127 | * keep the device in the REMOVED state. We also let this be if | |
2128 | * it is one of our special test online cases, which is only | |
2129 | * attempting to online the device and shouldn't generate an FMA | |
2130 | * fault. | |
2131 | */ | |
2132 | vd->vdev_state = VDEV_STATE_REMOVED; | |
2133 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
2134 | } else if (state == VDEV_STATE_REMOVED) { | |
2135 | /* | |
2136 | * Indicate to the ZFS DE that this device has been removed, and | |
2137 | * any recent errors should be ignored. | |
2138 | */ | |
2139 | zfs_post_remove(vd->vdev_spa, vd); | |
2140 | vd->vdev_removed = B_TRUE; | |
2141 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
2142 | /* | |
2143 | * If we fail to open a vdev during an import, we mark it as | |
2144 | * "not available", which signifies that it was never there to | |
2145 | * begin with. Failure to open such a device is not considered | |
2146 | * an error. | |
2147 | */ | |
2148 | if (vd->vdev_spa->spa_load_state == SPA_LOAD_IMPORT && | |
2149 | vd->vdev_ops->vdev_op_leaf) | |
2150 | vd->vdev_not_present = 1; | |
2151 | ||
2152 | /* | |
2153 | * Post the appropriate ereport. If the 'prevstate' field is | |
2154 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
2155 | * that this is part of a vdev_reopen(). In this case, we don't | |
2156 | * want to post the ereport if the device was already in the | |
2157 | * CANT_OPEN state beforehand. | |
2158 | * | |
2159 | * If the 'checkremove' flag is set, then this is an attempt to | |
2160 | * online the device in response to an insertion event. If we | |
2161 | * hit this case, then we have detected an insertion event for a | |
2162 | * faulted or offline device that wasn't in the removed state. | |
2163 | * In this scenario, we don't post an ereport because we are | |
2164 | * about to replace the device, or attempt an online with | |
2165 | * vdev_forcefault, which will generate the fault for us. | |
2166 | */ | |
2167 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
2168 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
2169 | vd != vd->vdev_spa->spa_root_vdev) { | |
2170 | const char *class; | |
2171 | ||
2172 | switch (aux) { | |
2173 | case VDEV_AUX_OPEN_FAILED: | |
2174 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
2175 | break; | |
2176 | case VDEV_AUX_CORRUPT_DATA: | |
2177 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
2178 | break; | |
2179 | case VDEV_AUX_NO_REPLICAS: | |
2180 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
2181 | break; | |
2182 | case VDEV_AUX_BAD_GUID_SUM: | |
2183 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
2184 | break; | |
2185 | case VDEV_AUX_TOO_SMALL: | |
2186 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
2187 | break; | |
2188 | case VDEV_AUX_BAD_LABEL: | |
2189 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
2190 | break; | |
2191 | default: | |
2192 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
2193 | } | |
2194 | ||
2195 | zfs_ereport_post(class, vd->vdev_spa, | |
2196 | vd, NULL, save_state, 0); | |
2197 | } | |
2198 | ||
2199 | /* Erase any notion of persistent removed state */ | |
2200 | vd->vdev_removed = B_FALSE; | |
2201 | } else { | |
2202 | vd->vdev_removed = B_FALSE; | |
2203 | } | |
2204 | ||
2205 | if (!isopen) | |
2206 | vdev_propagate_state(vd); | |
2207 | } |