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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 | /* | |
d164b209 | 23 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
24 | * Use is subject to license terms. |
25 | */ | |
26 | ||
34dc7c2f BB |
27 | #include <sys/zfs_context.h> |
28 | #include <sys/fm/fs/zfs.h> | |
29 | #include <sys/spa.h> | |
30 | #include <sys/spa_impl.h> | |
31 | #include <sys/dmu.h> | |
32 | #include <sys/dmu_tx.h> | |
33 | #include <sys/vdev_impl.h> | |
34 | #include <sys/uberblock_impl.h> | |
35 | #include <sys/metaslab.h> | |
36 | #include <sys/metaslab_impl.h> | |
37 | #include <sys/space_map.h> | |
38 | #include <sys/zio.h> | |
39 | #include <sys/zap.h> | |
40 | #include <sys/fs/zfs.h> | |
b128c09f | 41 | #include <sys/arc.h> |
34dc7c2f BB |
42 | |
43 | /* | |
44 | * Virtual device management. | |
45 | */ | |
46 | ||
47 | static vdev_ops_t *vdev_ops_table[] = { | |
48 | &vdev_root_ops, | |
49 | &vdev_raidz_ops, | |
50 | &vdev_mirror_ops, | |
51 | &vdev_replacing_ops, | |
52 | &vdev_spare_ops, | |
53 | &vdev_disk_ops, | |
54 | &vdev_file_ops, | |
55 | &vdev_missing_ops, | |
56 | NULL | |
57 | }; | |
58 | ||
b128c09f BB |
59 | /* maximum scrub/resilver I/O queue per leaf vdev */ |
60 | int zfs_scrub_limit = 10; | |
34dc7c2f BB |
61 | |
62 | /* | |
63 | * Given a vdev type, return the appropriate ops vector. | |
64 | */ | |
65 | static vdev_ops_t * | |
66 | vdev_getops(const char *type) | |
67 | { | |
68 | vdev_ops_t *ops, **opspp; | |
69 | ||
70 | for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) | |
71 | if (strcmp(ops->vdev_op_type, type) == 0) | |
72 | break; | |
73 | ||
74 | return (ops); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Default asize function: return the MAX of psize with the asize of | |
79 | * all children. This is what's used by anything other than RAID-Z. | |
80 | */ | |
81 | uint64_t | |
82 | vdev_default_asize(vdev_t *vd, uint64_t psize) | |
83 | { | |
84 | uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); | |
85 | uint64_t csize; | |
86 | uint64_t c; | |
87 | ||
88 | for (c = 0; c < vd->vdev_children; c++) { | |
89 | csize = vdev_psize_to_asize(vd->vdev_child[c], psize); | |
90 | asize = MAX(asize, csize); | |
91 | } | |
92 | ||
93 | return (asize); | |
94 | } | |
95 | ||
96 | /* | |
97 | * Get the replaceable or attachable device size. | |
98 | * If the parent is a mirror or raidz, the replaceable size is the minimum | |
99 | * psize of all its children. For the rest, just return our own psize. | |
100 | * | |
101 | * e.g. | |
102 | * psize rsize | |
103 | * root - - | |
104 | * mirror/raidz - - | |
105 | * disk1 20g 20g | |
106 | * disk2 40g 20g | |
107 | * disk3 80g 80g | |
108 | */ | |
109 | uint64_t | |
110 | vdev_get_rsize(vdev_t *vd) | |
111 | { | |
112 | vdev_t *pvd, *cvd; | |
113 | uint64_t c, rsize; | |
114 | ||
115 | pvd = vd->vdev_parent; | |
116 | ||
117 | /* | |
118 | * If our parent is NULL or the root, just return our own psize. | |
119 | */ | |
120 | if (pvd == NULL || pvd->vdev_parent == NULL) | |
121 | return (vd->vdev_psize); | |
122 | ||
123 | rsize = 0; | |
124 | ||
125 | for (c = 0; c < pvd->vdev_children; c++) { | |
126 | cvd = pvd->vdev_child[c]; | |
127 | rsize = MIN(rsize - 1, cvd->vdev_psize - 1) + 1; | |
128 | } | |
129 | ||
130 | return (rsize); | |
131 | } | |
132 | ||
133 | vdev_t * | |
134 | vdev_lookup_top(spa_t *spa, uint64_t vdev) | |
135 | { | |
136 | vdev_t *rvd = spa->spa_root_vdev; | |
137 | ||
b128c09f | 138 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 139 | |
b128c09f BB |
140 | if (vdev < rvd->vdev_children) { |
141 | ASSERT(rvd->vdev_child[vdev] != NULL); | |
34dc7c2f | 142 | return (rvd->vdev_child[vdev]); |
b128c09f | 143 | } |
34dc7c2f BB |
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 | ||
b128c09f | 172 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
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 | ||
b128c09f | 255 | ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
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); | |
b128c09f | 318 | mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); |
fb5f0bc8 BB |
319 | for (int t = 0; t < DTL_TYPES; t++) { |
320 | space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, | |
321 | &vd->vdev_dtl_lock); | |
322 | } | |
34dc7c2f BB |
323 | txg_list_create(&vd->vdev_ms_list, |
324 | offsetof(struct metaslab, ms_txg_node)); | |
325 | txg_list_create(&vd->vdev_dtl_list, | |
326 | offsetof(struct vdev, vdev_dtl_node)); | |
327 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
328 | vdev_queue_init(vd); | |
329 | vdev_cache_init(vd); | |
330 | ||
331 | return (vd); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
336 | * creating a new vdev or loading an existing one - the behavior is slightly | |
337 | * different for each case. | |
338 | */ | |
339 | int | |
340 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
341 | int alloctype) | |
342 | { | |
343 | vdev_ops_t *ops; | |
344 | char *type; | |
345 | uint64_t guid = 0, islog, nparity; | |
346 | vdev_t *vd; | |
347 | ||
b128c09f | 348 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
349 | |
350 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
351 | return (EINVAL); | |
352 | ||
353 | if ((ops = vdev_getops(type)) == NULL) | |
354 | return (EINVAL); | |
355 | ||
356 | /* | |
357 | * If this is a load, get the vdev guid from the nvlist. | |
358 | * Otherwise, vdev_alloc_common() will generate one for us. | |
359 | */ | |
360 | if (alloctype == VDEV_ALLOC_LOAD) { | |
361 | uint64_t label_id; | |
362 | ||
363 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
364 | label_id != id) | |
365 | return (EINVAL); | |
366 | ||
367 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
368 | return (EINVAL); | |
369 | } else if (alloctype == VDEV_ALLOC_SPARE) { | |
370 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
371 | return (EINVAL); | |
372 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { | |
373 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
374 | return (EINVAL); | |
375 | } | |
376 | ||
377 | /* | |
378 | * The first allocated vdev must be of type 'root'. | |
379 | */ | |
380 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
381 | return (EINVAL); | |
382 | ||
383 | /* | |
384 | * Determine whether we're a log vdev. | |
385 | */ | |
386 | islog = 0; | |
387 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
388 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
389 | return (ENOTSUP); | |
390 | ||
391 | /* | |
392 | * Set the nparity property for RAID-Z vdevs. | |
393 | */ | |
394 | nparity = -1ULL; | |
395 | if (ops == &vdev_raidz_ops) { | |
396 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
397 | &nparity) == 0) { | |
398 | /* | |
399 | * Currently, we can only support 2 parity devices. | |
400 | */ | |
401 | if (nparity == 0 || nparity > 2) | |
402 | return (EINVAL); | |
403 | /* | |
404 | * Older versions can only support 1 parity device. | |
405 | */ | |
406 | if (nparity == 2 && | |
407 | spa_version(spa) < SPA_VERSION_RAID6) | |
408 | return (ENOTSUP); | |
409 | } else { | |
410 | /* | |
411 | * We require the parity to be specified for SPAs that | |
412 | * support multiple parity levels. | |
413 | */ | |
414 | if (spa_version(spa) >= SPA_VERSION_RAID6) | |
415 | return (EINVAL); | |
416 | /* | |
417 | * Otherwise, we default to 1 parity device for RAID-Z. | |
418 | */ | |
419 | nparity = 1; | |
420 | } | |
421 | } else { | |
422 | nparity = 0; | |
423 | } | |
424 | ASSERT(nparity != -1ULL); | |
425 | ||
426 | vd = vdev_alloc_common(spa, id, guid, ops); | |
427 | ||
428 | vd->vdev_islog = islog; | |
429 | vd->vdev_nparity = nparity; | |
430 | ||
431 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
432 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
433 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) | |
434 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
435 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
436 | &vd->vdev_physpath) == 0) | |
437 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
438 | ||
439 | /* | |
440 | * Set the whole_disk property. If it's not specified, leave the value | |
441 | * as -1. | |
442 | */ | |
443 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
444 | &vd->vdev_wholedisk) != 0) | |
445 | vd->vdev_wholedisk = -1ULL; | |
446 | ||
447 | /* | |
448 | * Look for the 'not present' flag. This will only be set if the device | |
449 | * was not present at the time of import. | |
450 | */ | |
b128c09f BB |
451 | if (!spa->spa_import_faulted) |
452 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, | |
453 | &vd->vdev_not_present); | |
34dc7c2f BB |
454 | |
455 | /* | |
456 | * Get the alignment requirement. | |
457 | */ | |
458 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
459 | ||
460 | /* | |
461 | * If we're a top-level vdev, try to load the allocation parameters. | |
462 | */ | |
463 | if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { | |
464 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, | |
465 | &vd->vdev_ms_array); | |
466 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
467 | &vd->vdev_ms_shift); | |
468 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
469 | &vd->vdev_asize); | |
470 | } | |
471 | ||
472 | /* | |
473 | * If we're a leaf vdev, try to load the DTL object and other state. | |
474 | */ | |
b128c09f BB |
475 | if (vd->vdev_ops->vdev_op_leaf && |
476 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE)) { | |
477 | if (alloctype == VDEV_ALLOC_LOAD) { | |
478 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
fb5f0bc8 | 479 | &vd->vdev_dtl_smo.smo_object); |
b128c09f BB |
480 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, |
481 | &vd->vdev_unspare); | |
482 | } | |
34dc7c2f BB |
483 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, |
484 | &vd->vdev_offline); | |
b128c09f | 485 | |
34dc7c2f BB |
486 | /* |
487 | * When importing a pool, we want to ignore the persistent fault | |
488 | * state, as the diagnosis made on another system may not be | |
489 | * valid in the current context. | |
490 | */ | |
491 | if (spa->spa_load_state == SPA_LOAD_OPEN) { | |
492 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, | |
493 | &vd->vdev_faulted); | |
494 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
495 | &vd->vdev_degraded); | |
496 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
497 | &vd->vdev_removed); | |
498 | } | |
499 | } | |
500 | ||
501 | /* | |
502 | * Add ourselves to the parent's list of children. | |
503 | */ | |
504 | vdev_add_child(parent, vd); | |
505 | ||
506 | *vdp = vd; | |
507 | ||
508 | return (0); | |
509 | } | |
510 | ||
511 | void | |
512 | vdev_free(vdev_t *vd) | |
513 | { | |
514 | int c; | |
515 | spa_t *spa = vd->vdev_spa; | |
516 | ||
517 | /* | |
518 | * vdev_free() implies closing the vdev first. This is simpler than | |
519 | * trying to ensure complicated semantics for all callers. | |
520 | */ | |
521 | vdev_close(vd); | |
522 | ||
b128c09f | 523 | ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); |
34dc7c2f BB |
524 | |
525 | /* | |
526 | * Free all children. | |
527 | */ | |
528 | for (c = 0; c < vd->vdev_children; c++) | |
529 | vdev_free(vd->vdev_child[c]); | |
530 | ||
531 | ASSERT(vd->vdev_child == NULL); | |
532 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
533 | ||
534 | /* | |
535 | * Discard allocation state. | |
536 | */ | |
537 | if (vd == vd->vdev_top) | |
538 | vdev_metaslab_fini(vd); | |
539 | ||
540 | ASSERT3U(vd->vdev_stat.vs_space, ==, 0); | |
541 | ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); | |
542 | ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); | |
543 | ||
544 | /* | |
545 | * Remove this vdev from its parent's child list. | |
546 | */ | |
547 | vdev_remove_child(vd->vdev_parent, vd); | |
548 | ||
549 | ASSERT(vd->vdev_parent == NULL); | |
550 | ||
551 | /* | |
552 | * Clean up vdev structure. | |
553 | */ | |
554 | vdev_queue_fini(vd); | |
555 | vdev_cache_fini(vd); | |
556 | ||
557 | if (vd->vdev_path) | |
558 | spa_strfree(vd->vdev_path); | |
559 | if (vd->vdev_devid) | |
560 | spa_strfree(vd->vdev_devid); | |
561 | if (vd->vdev_physpath) | |
562 | spa_strfree(vd->vdev_physpath); | |
563 | ||
564 | if (vd->vdev_isspare) | |
565 | spa_spare_remove(vd); | |
566 | if (vd->vdev_isl2cache) | |
567 | spa_l2cache_remove(vd); | |
568 | ||
569 | txg_list_destroy(&vd->vdev_ms_list); | |
570 | txg_list_destroy(&vd->vdev_dtl_list); | |
fb5f0bc8 | 571 | |
34dc7c2f | 572 | mutex_enter(&vd->vdev_dtl_lock); |
fb5f0bc8 BB |
573 | for (int t = 0; t < DTL_TYPES; t++) { |
574 | space_map_unload(&vd->vdev_dtl[t]); | |
575 | space_map_destroy(&vd->vdev_dtl[t]); | |
576 | } | |
34dc7c2f | 577 | mutex_exit(&vd->vdev_dtl_lock); |
fb5f0bc8 | 578 | |
34dc7c2f BB |
579 | mutex_destroy(&vd->vdev_dtl_lock); |
580 | mutex_destroy(&vd->vdev_stat_lock); | |
b128c09f | 581 | mutex_destroy(&vd->vdev_probe_lock); |
34dc7c2f BB |
582 | |
583 | if (vd == spa->spa_root_vdev) | |
584 | spa->spa_root_vdev = NULL; | |
585 | ||
586 | kmem_free(vd, sizeof (vdev_t)); | |
587 | } | |
588 | ||
589 | /* | |
590 | * Transfer top-level vdev state from svd to tvd. | |
591 | */ | |
592 | static void | |
593 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
594 | { | |
595 | spa_t *spa = svd->vdev_spa; | |
596 | metaslab_t *msp; | |
597 | vdev_t *vd; | |
598 | int t; | |
599 | ||
600 | ASSERT(tvd == tvd->vdev_top); | |
601 | ||
602 | tvd->vdev_ms_array = svd->vdev_ms_array; | |
603 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
604 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
605 | ||
606 | svd->vdev_ms_array = 0; | |
607 | svd->vdev_ms_shift = 0; | |
608 | svd->vdev_ms_count = 0; | |
609 | ||
610 | tvd->vdev_mg = svd->vdev_mg; | |
611 | tvd->vdev_ms = svd->vdev_ms; | |
612 | ||
613 | svd->vdev_mg = NULL; | |
614 | svd->vdev_ms = NULL; | |
615 | ||
616 | if (tvd->vdev_mg != NULL) | |
617 | tvd->vdev_mg->mg_vd = tvd; | |
618 | ||
619 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; | |
620 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
621 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
622 | ||
623 | svd->vdev_stat.vs_alloc = 0; | |
624 | svd->vdev_stat.vs_space = 0; | |
625 | svd->vdev_stat.vs_dspace = 0; | |
626 | ||
627 | for (t = 0; t < TXG_SIZE; t++) { | |
628 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
629 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
630 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
631 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
632 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
633 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
634 | } | |
635 | ||
b128c09f | 636 | if (list_link_active(&svd->vdev_config_dirty_node)) { |
34dc7c2f BB |
637 | vdev_config_clean(svd); |
638 | vdev_config_dirty(tvd); | |
639 | } | |
640 | ||
b128c09f BB |
641 | if (list_link_active(&svd->vdev_state_dirty_node)) { |
642 | vdev_state_clean(svd); | |
643 | vdev_state_dirty(tvd); | |
644 | } | |
645 | ||
34dc7c2f BB |
646 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; |
647 | svd->vdev_deflate_ratio = 0; | |
648 | ||
649 | tvd->vdev_islog = svd->vdev_islog; | |
650 | svd->vdev_islog = 0; | |
651 | } | |
652 | ||
653 | static void | |
654 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
655 | { | |
656 | int c; | |
657 | ||
658 | if (vd == NULL) | |
659 | return; | |
660 | ||
661 | vd->vdev_top = tvd; | |
662 | ||
663 | for (c = 0; c < vd->vdev_children; c++) | |
664 | vdev_top_update(tvd, vd->vdev_child[c]); | |
665 | } | |
666 | ||
667 | /* | |
668 | * Add a mirror/replacing vdev above an existing vdev. | |
669 | */ | |
670 | vdev_t * | |
671 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
672 | { | |
673 | spa_t *spa = cvd->vdev_spa; | |
674 | vdev_t *pvd = cvd->vdev_parent; | |
675 | vdev_t *mvd; | |
676 | ||
b128c09f | 677 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
678 | |
679 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
680 | ||
681 | mvd->vdev_asize = cvd->vdev_asize; | |
682 | mvd->vdev_ashift = cvd->vdev_ashift; | |
683 | mvd->vdev_state = cvd->vdev_state; | |
684 | ||
685 | vdev_remove_child(pvd, cvd); | |
686 | vdev_add_child(pvd, mvd); | |
687 | cvd->vdev_id = mvd->vdev_children; | |
688 | vdev_add_child(mvd, cvd); | |
689 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
690 | ||
691 | if (mvd == mvd->vdev_top) | |
692 | vdev_top_transfer(cvd, mvd); | |
693 | ||
694 | return (mvd); | |
695 | } | |
696 | ||
697 | /* | |
698 | * Remove a 1-way mirror/replacing vdev from the tree. | |
699 | */ | |
700 | void | |
701 | vdev_remove_parent(vdev_t *cvd) | |
702 | { | |
703 | vdev_t *mvd = cvd->vdev_parent; | |
704 | vdev_t *pvd = mvd->vdev_parent; | |
705 | ||
b128c09f | 706 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
707 | |
708 | ASSERT(mvd->vdev_children == 1); | |
709 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
710 | mvd->vdev_ops == &vdev_replacing_ops || | |
711 | mvd->vdev_ops == &vdev_spare_ops); | |
712 | cvd->vdev_ashift = mvd->vdev_ashift; | |
713 | ||
714 | vdev_remove_child(mvd, cvd); | |
715 | vdev_remove_child(pvd, mvd); | |
fb5f0bc8 | 716 | |
34dc7c2f | 717 | /* |
b128c09f BB |
718 | * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. |
719 | * Otherwise, we could have detached an offline device, and when we | |
720 | * go to import the pool we'll think we have two top-level vdevs, | |
721 | * instead of a different version of the same top-level vdev. | |
34dc7c2f | 722 | */ |
fb5f0bc8 BB |
723 | if (mvd->vdev_top == mvd) { |
724 | uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; | |
725 | cvd->vdev_guid += guid_delta; | |
726 | cvd->vdev_guid_sum += guid_delta; | |
727 | } | |
b128c09f BB |
728 | cvd->vdev_id = mvd->vdev_id; |
729 | vdev_add_child(pvd, cvd); | |
34dc7c2f BB |
730 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); |
731 | ||
732 | if (cvd == cvd->vdev_top) | |
733 | vdev_top_transfer(mvd, cvd); | |
734 | ||
735 | ASSERT(mvd->vdev_children == 0); | |
736 | vdev_free(mvd); | |
737 | } | |
738 | ||
739 | int | |
740 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
741 | { | |
742 | spa_t *spa = vd->vdev_spa; | |
743 | objset_t *mos = spa->spa_meta_objset; | |
744 | metaslab_class_t *mc; | |
745 | uint64_t m; | |
746 | uint64_t oldc = vd->vdev_ms_count; | |
747 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
748 | metaslab_t **mspp; | |
749 | int error; | |
750 | ||
751 | if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ | |
752 | return (0); | |
753 | ||
34dc7c2f BB |
754 | ASSERT(oldc <= newc); |
755 | ||
756 | if (vd->vdev_islog) | |
757 | mc = spa->spa_log_class; | |
758 | else | |
759 | mc = spa->spa_normal_class; | |
760 | ||
761 | if (vd->vdev_mg == NULL) | |
762 | vd->vdev_mg = metaslab_group_create(mc, vd); | |
763 | ||
764 | mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); | |
765 | ||
766 | if (oldc != 0) { | |
767 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
768 | kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); | |
769 | } | |
770 | ||
771 | vd->vdev_ms = mspp; | |
772 | vd->vdev_ms_count = newc; | |
773 | ||
774 | for (m = oldc; m < newc; m++) { | |
775 | space_map_obj_t smo = { 0, 0, 0 }; | |
776 | if (txg == 0) { | |
777 | uint64_t object = 0; | |
778 | error = dmu_read(mos, vd->vdev_ms_array, | |
779 | m * sizeof (uint64_t), sizeof (uint64_t), &object); | |
780 | if (error) | |
781 | return (error); | |
782 | if (object != 0) { | |
783 | dmu_buf_t *db; | |
784 | error = dmu_bonus_hold(mos, object, FTAG, &db); | |
785 | if (error) | |
786 | return (error); | |
787 | ASSERT3U(db->db_size, >=, sizeof (smo)); | |
788 | bcopy(db->db_data, &smo, sizeof (smo)); | |
789 | ASSERT3U(smo.smo_object, ==, object); | |
790 | dmu_buf_rele(db, FTAG); | |
791 | } | |
792 | } | |
793 | vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, | |
794 | m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); | |
795 | } | |
796 | ||
797 | return (0); | |
798 | } | |
799 | ||
800 | void | |
801 | vdev_metaslab_fini(vdev_t *vd) | |
802 | { | |
803 | uint64_t m; | |
804 | uint64_t count = vd->vdev_ms_count; | |
805 | ||
806 | if (vd->vdev_ms != NULL) { | |
807 | for (m = 0; m < count; m++) | |
808 | if (vd->vdev_ms[m] != NULL) | |
809 | metaslab_fini(vd->vdev_ms[m]); | |
810 | kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); | |
811 | vd->vdev_ms = NULL; | |
812 | } | |
813 | } | |
814 | ||
b128c09f BB |
815 | typedef struct vdev_probe_stats { |
816 | boolean_t vps_readable; | |
817 | boolean_t vps_writeable; | |
818 | int vps_flags; | |
b128c09f BB |
819 | } vdev_probe_stats_t; |
820 | ||
821 | static void | |
822 | vdev_probe_done(zio_t *zio) | |
34dc7c2f | 823 | { |
fb5f0bc8 | 824 | spa_t *spa = zio->io_spa; |
d164b209 | 825 | vdev_t *vd = zio->io_vd; |
b128c09f | 826 | vdev_probe_stats_t *vps = zio->io_private; |
d164b209 BB |
827 | |
828 | ASSERT(vd->vdev_probe_zio != NULL); | |
b128c09f BB |
829 | |
830 | if (zio->io_type == ZIO_TYPE_READ) { | |
b128c09f BB |
831 | if (zio->io_error == 0) |
832 | vps->vps_readable = 1; | |
fb5f0bc8 | 833 | if (zio->io_error == 0 && spa_writeable(spa)) { |
d164b209 | 834 | zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, |
b128c09f BB |
835 | zio->io_offset, zio->io_size, zio->io_data, |
836 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
837 | ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); | |
838 | } else { | |
839 | zio_buf_free(zio->io_data, zio->io_size); | |
840 | } | |
841 | } else if (zio->io_type == ZIO_TYPE_WRITE) { | |
b128c09f BB |
842 | if (zio->io_error == 0) |
843 | vps->vps_writeable = 1; | |
844 | zio_buf_free(zio->io_data, zio->io_size); | |
845 | } else if (zio->io_type == ZIO_TYPE_NULL) { | |
d164b209 | 846 | zio_t *pio; |
b128c09f BB |
847 | |
848 | vd->vdev_cant_read |= !vps->vps_readable; | |
849 | vd->vdev_cant_write |= !vps->vps_writeable; | |
850 | ||
851 | if (vdev_readable(vd) && | |
fb5f0bc8 | 852 | (vdev_writeable(vd) || !spa_writeable(spa))) { |
b128c09f BB |
853 | zio->io_error = 0; |
854 | } else { | |
855 | ASSERT(zio->io_error != 0); | |
856 | zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, | |
fb5f0bc8 | 857 | spa, vd, NULL, 0, 0); |
b128c09f BB |
858 | zio->io_error = ENXIO; |
859 | } | |
d164b209 BB |
860 | |
861 | mutex_enter(&vd->vdev_probe_lock); | |
862 | ASSERT(vd->vdev_probe_zio == zio); | |
863 | vd->vdev_probe_zio = NULL; | |
864 | mutex_exit(&vd->vdev_probe_lock); | |
865 | ||
866 | while ((pio = zio_walk_parents(zio)) != NULL) | |
867 | if (!vdev_accessible(vd, pio)) | |
868 | pio->io_error = ENXIO; | |
869 | ||
b128c09f BB |
870 | kmem_free(vps, sizeof (*vps)); |
871 | } | |
872 | } | |
34dc7c2f | 873 | |
b128c09f BB |
874 | /* |
875 | * Determine whether this device is accessible by reading and writing | |
876 | * to several known locations: the pad regions of each vdev label | |
877 | * but the first (which we leave alone in case it contains a VTOC). | |
878 | */ | |
879 | zio_t * | |
d164b209 | 880 | vdev_probe(vdev_t *vd, zio_t *zio) |
b128c09f BB |
881 | { |
882 | spa_t *spa = vd->vdev_spa; | |
d164b209 BB |
883 | vdev_probe_stats_t *vps = NULL; |
884 | zio_t *pio; | |
885 | ||
886 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
34dc7c2f | 887 | |
d164b209 BB |
888 | /* |
889 | * Don't probe the probe. | |
890 | */ | |
891 | if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) | |
892 | return (NULL); | |
b128c09f | 893 | |
d164b209 BB |
894 | /* |
895 | * To prevent 'probe storms' when a device fails, we create | |
896 | * just one probe i/o at a time. All zios that want to probe | |
897 | * this vdev will become parents of the probe io. | |
898 | */ | |
899 | mutex_enter(&vd->vdev_probe_lock); | |
b128c09f | 900 | |
d164b209 BB |
901 | if ((pio = vd->vdev_probe_zio) == NULL) { |
902 | vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); | |
903 | ||
904 | vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | | |
905 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | | |
906 | ZIO_FLAG_DONT_RETRY; | |
907 | ||
908 | if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { | |
909 | /* | |
910 | * vdev_cant_read and vdev_cant_write can only | |
911 | * transition from TRUE to FALSE when we have the | |
912 | * SCL_ZIO lock as writer; otherwise they can only | |
913 | * transition from FALSE to TRUE. This ensures that | |
914 | * any zio looking at these values can assume that | |
915 | * failures persist for the life of the I/O. That's | |
916 | * important because when a device has intermittent | |
917 | * connectivity problems, we want to ensure that | |
918 | * they're ascribed to the device (ENXIO) and not | |
919 | * the zio (EIO). | |
920 | * | |
921 | * Since we hold SCL_ZIO as writer here, clear both | |
922 | * values so the probe can reevaluate from first | |
923 | * principles. | |
924 | */ | |
925 | vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; | |
926 | vd->vdev_cant_read = B_FALSE; | |
927 | vd->vdev_cant_write = B_FALSE; | |
928 | } | |
929 | ||
930 | vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, | |
931 | vdev_probe_done, vps, | |
932 | vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); | |
933 | ||
934 | if (zio != NULL) { | |
935 | vd->vdev_probe_wanted = B_TRUE; | |
936 | spa_async_request(spa, SPA_ASYNC_PROBE); | |
937 | } | |
b128c09f BB |
938 | } |
939 | ||
d164b209 BB |
940 | if (zio != NULL) |
941 | zio_add_child(zio, pio); | |
b128c09f | 942 | |
d164b209 | 943 | mutex_exit(&vd->vdev_probe_lock); |
b128c09f | 944 | |
d164b209 BB |
945 | if (vps == NULL) { |
946 | ASSERT(zio != NULL); | |
947 | return (NULL); | |
948 | } | |
b128c09f BB |
949 | |
950 | for (int l = 1; l < VDEV_LABELS; l++) { | |
d164b209 | 951 | zio_nowait(zio_read_phys(pio, vd, |
b128c09f BB |
952 | vdev_label_offset(vd->vdev_psize, l, |
953 | offsetof(vdev_label_t, vl_pad)), | |
954 | VDEV_SKIP_SIZE, zio_buf_alloc(VDEV_SKIP_SIZE), | |
955 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
956 | ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); | |
957 | } | |
958 | ||
d164b209 BB |
959 | if (zio == NULL) |
960 | return (pio); | |
961 | ||
962 | zio_nowait(pio); | |
963 | return (NULL); | |
34dc7c2f BB |
964 | } |
965 | ||
966 | /* | |
967 | * Prepare a virtual device for access. | |
968 | */ | |
969 | int | |
970 | vdev_open(vdev_t *vd) | |
971 | { | |
fb5f0bc8 | 972 | spa_t *spa = vd->vdev_spa; |
34dc7c2f BB |
973 | int error; |
974 | int c; | |
975 | uint64_t osize = 0; | |
976 | uint64_t asize, psize; | |
977 | uint64_t ashift = 0; | |
978 | ||
fb5f0bc8 BB |
979 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
980 | ||
34dc7c2f BB |
981 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || |
982 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
983 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
984 | ||
34dc7c2f BB |
985 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; |
986 | ||
987 | if (!vd->vdev_removed && vd->vdev_faulted) { | |
988 | ASSERT(vd->vdev_children == 0); | |
989 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
990 | VDEV_AUX_ERR_EXCEEDED); | |
991 | return (ENXIO); | |
992 | } else if (vd->vdev_offline) { | |
993 | ASSERT(vd->vdev_children == 0); | |
994 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
995 | return (ENXIO); | |
996 | } | |
997 | ||
998 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); | |
999 | ||
1000 | if (zio_injection_enabled && error == 0) | |
1001 | error = zio_handle_device_injection(vd, ENXIO); | |
1002 | ||
1003 | if (error) { | |
1004 | if (vd->vdev_removed && | |
1005 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
1006 | vd->vdev_removed = B_FALSE; | |
1007 | ||
1008 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1009 | vd->vdev_stat.vs_aux); | |
1010 | return (error); | |
1011 | } | |
1012 | ||
1013 | vd->vdev_removed = B_FALSE; | |
1014 | ||
1015 | if (vd->vdev_degraded) { | |
1016 | ASSERT(vd->vdev_children == 0); | |
1017 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1018 | VDEV_AUX_ERR_EXCEEDED); | |
1019 | } else { | |
1020 | vd->vdev_state = VDEV_STATE_HEALTHY; | |
1021 | } | |
1022 | ||
1023 | for (c = 0; c < vd->vdev_children; c++) | |
1024 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { | |
1025 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1026 | VDEV_AUX_NONE); | |
1027 | break; | |
1028 | } | |
1029 | ||
1030 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
1031 | ||
1032 | if (vd->vdev_children == 0) { | |
1033 | if (osize < SPA_MINDEVSIZE) { | |
1034 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1035 | VDEV_AUX_TOO_SMALL); | |
1036 | return (EOVERFLOW); | |
1037 | } | |
1038 | psize = osize; | |
1039 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
1040 | } else { | |
1041 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
1042 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
1043 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1044 | VDEV_AUX_TOO_SMALL); | |
1045 | return (EOVERFLOW); | |
1046 | } | |
1047 | psize = 0; | |
1048 | asize = osize; | |
1049 | } | |
1050 | ||
1051 | vd->vdev_psize = psize; | |
1052 | ||
1053 | if (vd->vdev_asize == 0) { | |
1054 | /* | |
1055 | * This is the first-ever open, so use the computed values. | |
1056 | * For testing purposes, a higher ashift can be requested. | |
1057 | */ | |
1058 | vd->vdev_asize = asize; | |
1059 | vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); | |
1060 | } else { | |
1061 | /* | |
1062 | * Make sure the alignment requirement hasn't increased. | |
1063 | */ | |
1064 | if (ashift > vd->vdev_top->vdev_ashift) { | |
1065 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1066 | VDEV_AUX_BAD_LABEL); | |
1067 | return (EINVAL); | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * Make sure the device hasn't shrunk. | |
1072 | */ | |
1073 | if (asize < vd->vdev_asize) { | |
1074 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1075 | VDEV_AUX_BAD_LABEL); | |
1076 | return (EINVAL); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * If all children are healthy and the asize has increased, | |
1081 | * then we've experienced dynamic LUN growth. | |
1082 | */ | |
1083 | if (vd->vdev_state == VDEV_STATE_HEALTHY && | |
1084 | asize > vd->vdev_asize) { | |
1085 | vd->vdev_asize = asize; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * Ensure we can issue some IO before declaring the | |
1091 | * vdev open for business. | |
1092 | */ | |
b128c09f BB |
1093 | if (vd->vdev_ops->vdev_op_leaf && |
1094 | (error = zio_wait(vdev_probe(vd, NULL))) != 0) { | |
34dc7c2f | 1095 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, |
b128c09f | 1096 | VDEV_AUX_IO_FAILURE); |
34dc7c2f BB |
1097 | return (error); |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * If this is a top-level vdev, compute the raidz-deflation | |
1102 | * ratio. Note, we hard-code in 128k (1<<17) because it is the | |
1103 | * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE | |
1104 | * changes, this algorithm must never change, or we will | |
1105 | * inconsistently account for existing bp's. | |
1106 | */ | |
1107 | if (vd->vdev_top == vd) { | |
1108 | vd->vdev_deflate_ratio = (1<<17) / | |
1109 | (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); | |
1110 | } | |
1111 | ||
1112 | /* | |
b128c09f | 1113 | * If a leaf vdev has a DTL, and seems healthy, then kick off a |
fb5f0bc8 BB |
1114 | * resilver. But don't do this if we are doing a reopen for a scrub, |
1115 | * since this would just restart the scrub we are already doing. | |
34dc7c2f | 1116 | */ |
fb5f0bc8 BB |
1117 | if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && |
1118 | vdev_resilver_needed(vd, NULL, NULL)) | |
1119 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
34dc7c2f BB |
1120 | |
1121 | return (0); | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Called once the vdevs are all opened, this routine validates the label | |
1126 | * contents. This needs to be done before vdev_load() so that we don't | |
1127 | * inadvertently do repair I/Os to the wrong device. | |
1128 | * | |
1129 | * This function will only return failure if one of the vdevs indicates that it | |
1130 | * has since been destroyed or exported. This is only possible if | |
1131 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
1132 | * will be updated but the function will return 0. | |
1133 | */ | |
1134 | int | |
1135 | vdev_validate(vdev_t *vd) | |
1136 | { | |
1137 | spa_t *spa = vd->vdev_spa; | |
1138 | int c; | |
1139 | nvlist_t *label; | |
b128c09f | 1140 | uint64_t guid, top_guid; |
34dc7c2f BB |
1141 | uint64_t state; |
1142 | ||
1143 | for (c = 0; c < vd->vdev_children; c++) | |
1144 | if (vdev_validate(vd->vdev_child[c]) != 0) | |
1145 | return (EBADF); | |
1146 | ||
1147 | /* | |
1148 | * If the device has already failed, or was marked offline, don't do | |
1149 | * any further validation. Otherwise, label I/O will fail and we will | |
1150 | * overwrite the previous state. | |
1151 | */ | |
b128c09f | 1152 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { |
34dc7c2f BB |
1153 | |
1154 | if ((label = vdev_label_read_config(vd)) == NULL) { | |
1155 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1156 | VDEV_AUX_BAD_LABEL); | |
1157 | return (0); | |
1158 | } | |
1159 | ||
1160 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, | |
1161 | &guid) != 0 || guid != spa_guid(spa)) { | |
1162 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1163 | VDEV_AUX_CORRUPT_DATA); | |
1164 | nvlist_free(label); | |
1165 | return (0); | |
1166 | } | |
1167 | ||
b128c09f BB |
1168 | /* |
1169 | * If this vdev just became a top-level vdev because its | |
1170 | * sibling was detached, it will have adopted the parent's | |
1171 | * vdev guid -- but the label may or may not be on disk yet. | |
1172 | * Fortunately, either version of the label will have the | |
1173 | * same top guid, so if we're a top-level vdev, we can | |
1174 | * safely compare to that instead. | |
1175 | */ | |
34dc7c2f | 1176 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, |
b128c09f BB |
1177 | &guid) != 0 || |
1178 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, | |
1179 | &top_guid) != 0 || | |
1180 | (vd->vdev_guid != guid && | |
1181 | (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { | |
34dc7c2f BB |
1182 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
1183 | VDEV_AUX_CORRUPT_DATA); | |
1184 | nvlist_free(label); | |
1185 | return (0); | |
1186 | } | |
1187 | ||
1188 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1189 | &state) != 0) { | |
1190 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1191 | VDEV_AUX_CORRUPT_DATA); | |
1192 | nvlist_free(label); | |
1193 | return (0); | |
1194 | } | |
1195 | ||
1196 | nvlist_free(label); | |
1197 | ||
1198 | if (spa->spa_load_state == SPA_LOAD_OPEN && | |
1199 | state != POOL_STATE_ACTIVE) | |
1200 | return (EBADF); | |
34dc7c2f | 1201 | |
b128c09f BB |
1202 | /* |
1203 | * If we were able to open and validate a vdev that was | |
1204 | * previously marked permanently unavailable, clear that state | |
1205 | * now. | |
1206 | */ | |
1207 | if (vd->vdev_not_present) | |
1208 | vd->vdev_not_present = 0; | |
1209 | } | |
34dc7c2f BB |
1210 | |
1211 | return (0); | |
1212 | } | |
1213 | ||
1214 | /* | |
1215 | * Close a virtual device. | |
1216 | */ | |
1217 | void | |
1218 | vdev_close(vdev_t *vd) | |
1219 | { | |
fb5f0bc8 BB |
1220 | spa_t *spa = vd->vdev_spa; |
1221 | ||
1222 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1223 | ||
34dc7c2f BB |
1224 | vd->vdev_ops->vdev_op_close(vd); |
1225 | ||
1226 | vdev_cache_purge(vd); | |
1227 | ||
1228 | /* | |
1229 | * We record the previous state before we close it, so that if we are | |
1230 | * doing a reopen(), we don't generate FMA ereports if we notice that | |
1231 | * it's still faulted. | |
1232 | */ | |
1233 | vd->vdev_prevstate = vd->vdev_state; | |
1234 | ||
1235 | if (vd->vdev_offline) | |
1236 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
1237 | else | |
1238 | vd->vdev_state = VDEV_STATE_CLOSED; | |
1239 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1240 | } | |
1241 | ||
1242 | void | |
1243 | vdev_reopen(vdev_t *vd) | |
1244 | { | |
1245 | spa_t *spa = vd->vdev_spa; | |
1246 | ||
b128c09f | 1247 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
34dc7c2f BB |
1248 | |
1249 | vdev_close(vd); | |
1250 | (void) vdev_open(vd); | |
1251 | ||
1252 | /* | |
1253 | * Call vdev_validate() here to make sure we have the same device. | |
1254 | * Otherwise, a device with an invalid label could be successfully | |
1255 | * opened in response to vdev_reopen(). | |
1256 | */ | |
b128c09f BB |
1257 | if (vd->vdev_aux) { |
1258 | (void) vdev_validate_aux(vd); | |
1259 | if (vdev_readable(vd) && vdev_writeable(vd) && | |
1260 | !l2arc_vdev_present(vd)) { | |
1261 | uint64_t size = vdev_get_rsize(vd); | |
1262 | l2arc_add_vdev(spa, vd, | |
1263 | VDEV_LABEL_START_SIZE, | |
1264 | size - VDEV_LABEL_START_SIZE); | |
1265 | } | |
1266 | } else { | |
1267 | (void) vdev_validate(vd); | |
1268 | } | |
34dc7c2f BB |
1269 | |
1270 | /* | |
1271 | * Reassess parent vdev's health. | |
1272 | */ | |
1273 | vdev_propagate_state(vd); | |
1274 | } | |
1275 | ||
1276 | int | |
1277 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
1278 | { | |
1279 | int error; | |
1280 | ||
1281 | /* | |
1282 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
1283 | * For a create, however, we want to fail the request if | |
1284 | * there are any components we can't open. | |
1285 | */ | |
1286 | error = vdev_open(vd); | |
1287 | ||
1288 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
1289 | vdev_close(vd); | |
1290 | return (error ? error : ENXIO); | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * Recursively initialize all labels. | |
1295 | */ | |
1296 | if ((error = vdev_label_init(vd, txg, isreplacing ? | |
1297 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { | |
1298 | vdev_close(vd); | |
1299 | return (error); | |
1300 | } | |
1301 | ||
1302 | return (0); | |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | * The is the latter half of vdev_create(). It is distinct because it | |
1307 | * involves initiating transactions in order to do metaslab creation. | |
1308 | * For creation, we want to try to create all vdevs at once and then undo it | |
1309 | * if anything fails; this is much harder if we have pending transactions. | |
1310 | */ | |
1311 | void | |
1312 | vdev_init(vdev_t *vd, uint64_t txg) | |
1313 | { | |
1314 | /* | |
1315 | * Aim for roughly 200 metaslabs per vdev. | |
1316 | */ | |
1317 | vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); | |
1318 | vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); | |
1319 | ||
1320 | /* | |
1321 | * Initialize the vdev's metaslabs. This can't fail because | |
1322 | * there's nothing to read when creating all new metaslabs. | |
1323 | */ | |
1324 | VERIFY(vdev_metaslab_init(vd, txg) == 0); | |
1325 | } | |
1326 | ||
1327 | void | |
1328 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
1329 | { | |
1330 | ASSERT(vd == vd->vdev_top); | |
1331 | ASSERT(ISP2(flags)); | |
1332 | ||
1333 | if (flags & VDD_METASLAB) | |
1334 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
1335 | ||
1336 | if (flags & VDD_DTL) | |
1337 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
1338 | ||
1339 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
1340 | } | |
1341 | ||
fb5f0bc8 BB |
1342 | /* |
1343 | * DTLs. | |
1344 | * | |
1345 | * A vdev's DTL (dirty time log) is the set of transaction groups for which | |
1346 | * the vdev has less than perfect replication. There are three kinds of DTL: | |
1347 | * | |
1348 | * DTL_MISSING: txgs for which the vdev has no valid copies of the data | |
1349 | * | |
1350 | * DTL_PARTIAL: txgs for which data is available, but not fully replicated | |
1351 | * | |
1352 | * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon | |
1353 | * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of | |
1354 | * txgs that was scrubbed. | |
1355 | * | |
1356 | * DTL_OUTAGE: txgs which cannot currently be read, whether due to | |
1357 | * persistent errors or just some device being offline. | |
1358 | * Unlike the other three, the DTL_OUTAGE map is not generally | |
1359 | * maintained; it's only computed when needed, typically to | |
1360 | * determine whether a device can be detached. | |
1361 | * | |
1362 | * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device | |
1363 | * either has the data or it doesn't. | |
1364 | * | |
1365 | * For interior vdevs such as mirror and RAID-Z the picture is more complex. | |
1366 | * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because | |
1367 | * if any child is less than fully replicated, then so is its parent. | |
1368 | * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, | |
1369 | * comprising only those txgs which appear in 'maxfaults' or more children; | |
1370 | * those are the txgs we don't have enough replication to read. For example, | |
1371 | * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); | |
1372 | * thus, its DTL_MISSING consists of the set of txgs that appear in more than | |
1373 | * two child DTL_MISSING maps. | |
1374 | * | |
1375 | * It should be clear from the above that to compute the DTLs and outage maps | |
1376 | * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. | |
1377 | * Therefore, that is all we keep on disk. When loading the pool, or after | |
1378 | * a configuration change, we generate all other DTLs from first principles. | |
1379 | */ | |
34dc7c2f | 1380 | void |
fb5f0bc8 | 1381 | vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) |
34dc7c2f | 1382 | { |
fb5f0bc8 BB |
1383 | space_map_t *sm = &vd->vdev_dtl[t]; |
1384 | ||
1385 | ASSERT(t < DTL_TYPES); | |
1386 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
1387 | ||
34dc7c2f BB |
1388 | mutex_enter(sm->sm_lock); |
1389 | if (!space_map_contains(sm, txg, size)) | |
1390 | space_map_add(sm, txg, size); | |
1391 | mutex_exit(sm->sm_lock); | |
1392 | } | |
1393 | ||
fb5f0bc8 BB |
1394 | boolean_t |
1395 | vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) | |
34dc7c2f | 1396 | { |
fb5f0bc8 BB |
1397 | space_map_t *sm = &vd->vdev_dtl[t]; |
1398 | boolean_t dirty = B_FALSE; | |
34dc7c2f | 1399 | |
fb5f0bc8 BB |
1400 | ASSERT(t < DTL_TYPES); |
1401 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
34dc7c2f BB |
1402 | |
1403 | mutex_enter(sm->sm_lock); | |
fb5f0bc8 BB |
1404 | if (sm->sm_space != 0) |
1405 | dirty = space_map_contains(sm, txg, size); | |
34dc7c2f BB |
1406 | mutex_exit(sm->sm_lock); |
1407 | ||
1408 | return (dirty); | |
1409 | } | |
1410 | ||
fb5f0bc8 BB |
1411 | boolean_t |
1412 | vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) | |
1413 | { | |
1414 | space_map_t *sm = &vd->vdev_dtl[t]; | |
1415 | boolean_t empty; | |
1416 | ||
1417 | mutex_enter(sm->sm_lock); | |
1418 | empty = (sm->sm_space == 0); | |
1419 | mutex_exit(sm->sm_lock); | |
1420 | ||
1421 | return (empty); | |
1422 | } | |
1423 | ||
34dc7c2f BB |
1424 | /* |
1425 | * Reassess DTLs after a config change or scrub completion. | |
1426 | */ | |
1427 | void | |
1428 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
1429 | { | |
1430 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 BB |
1431 | avl_tree_t reftree; |
1432 | int minref; | |
34dc7c2f | 1433 | |
fb5f0bc8 | 1434 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 1435 | |
fb5f0bc8 BB |
1436 | for (int c = 0; c < vd->vdev_children; c++) |
1437 | vdev_dtl_reassess(vd->vdev_child[c], txg, | |
1438 | scrub_txg, scrub_done); | |
1439 | ||
1440 | if (vd == spa->spa_root_vdev) | |
1441 | return; | |
1442 | ||
1443 | if (vd->vdev_ops->vdev_op_leaf) { | |
34dc7c2f | 1444 | mutex_enter(&vd->vdev_dtl_lock); |
b128c09f BB |
1445 | if (scrub_txg != 0 && |
1446 | (spa->spa_scrub_started || spa->spa_scrub_errors == 0)) { | |
1447 | /* XXX should check scrub_done? */ | |
1448 | /* | |
1449 | * We completed a scrub up to scrub_txg. If we | |
1450 | * did it without rebooting, then the scrub dtl | |
1451 | * will be valid, so excise the old region and | |
1452 | * fold in the scrub dtl. Otherwise, leave the | |
1453 | * dtl as-is if there was an error. | |
fb5f0bc8 BB |
1454 | * |
1455 | * There's little trick here: to excise the beginning | |
1456 | * of the DTL_MISSING map, we put it into a reference | |
1457 | * tree and then add a segment with refcnt -1 that | |
1458 | * covers the range [0, scrub_txg). This means | |
1459 | * that each txg in that range has refcnt -1 or 0. | |
1460 | * We then add DTL_SCRUB with a refcnt of 2, so that | |
1461 | * entries in the range [0, scrub_txg) will have a | |
1462 | * positive refcnt -- either 1 or 2. We then convert | |
1463 | * the reference tree into the new DTL_MISSING map. | |
b128c09f | 1464 | */ |
fb5f0bc8 BB |
1465 | space_map_ref_create(&reftree); |
1466 | space_map_ref_add_map(&reftree, | |
1467 | &vd->vdev_dtl[DTL_MISSING], 1); | |
1468 | space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); | |
1469 | space_map_ref_add_map(&reftree, | |
1470 | &vd->vdev_dtl[DTL_SCRUB], 2); | |
1471 | space_map_ref_generate_map(&reftree, | |
1472 | &vd->vdev_dtl[DTL_MISSING], 1); | |
1473 | space_map_ref_destroy(&reftree); | |
34dc7c2f | 1474 | } |
fb5f0bc8 BB |
1475 | space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); |
1476 | space_map_walk(&vd->vdev_dtl[DTL_MISSING], | |
1477 | space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); | |
34dc7c2f | 1478 | if (scrub_done) |
fb5f0bc8 BB |
1479 | space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); |
1480 | space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); | |
1481 | if (!vdev_readable(vd)) | |
1482 | space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); | |
1483 | else | |
1484 | space_map_walk(&vd->vdev_dtl[DTL_MISSING], | |
1485 | space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); | |
34dc7c2f | 1486 | mutex_exit(&vd->vdev_dtl_lock); |
b128c09f | 1487 | |
34dc7c2f BB |
1488 | if (txg != 0) |
1489 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
1490 | return; | |
1491 | } | |
1492 | ||
34dc7c2f | 1493 | mutex_enter(&vd->vdev_dtl_lock); |
fb5f0bc8 BB |
1494 | for (int t = 0; t < DTL_TYPES; t++) { |
1495 | if (t == DTL_SCRUB) | |
1496 | continue; /* leaf vdevs only */ | |
1497 | if (t == DTL_PARTIAL) | |
1498 | minref = 1; /* i.e. non-zero */ | |
1499 | else if (vd->vdev_nparity != 0) | |
1500 | minref = vd->vdev_nparity + 1; /* RAID-Z */ | |
1501 | else | |
1502 | minref = vd->vdev_children; /* any kind of mirror */ | |
1503 | space_map_ref_create(&reftree); | |
1504 | for (int c = 0; c < vd->vdev_children; c++) { | |
1505 | vdev_t *cvd = vd->vdev_child[c]; | |
1506 | mutex_enter(&cvd->vdev_dtl_lock); | |
1507 | space_map_ref_add_map(&reftree, &cvd->vdev_dtl[t], 1); | |
1508 | mutex_exit(&cvd->vdev_dtl_lock); | |
1509 | } | |
1510 | space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); | |
1511 | space_map_ref_destroy(&reftree); | |
34dc7c2f | 1512 | } |
fb5f0bc8 | 1513 | mutex_exit(&vd->vdev_dtl_lock); |
34dc7c2f BB |
1514 | } |
1515 | ||
1516 | static int | |
1517 | vdev_dtl_load(vdev_t *vd) | |
1518 | { | |
1519 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 | 1520 | space_map_obj_t *smo = &vd->vdev_dtl_smo; |
34dc7c2f BB |
1521 | objset_t *mos = spa->spa_meta_objset; |
1522 | dmu_buf_t *db; | |
1523 | int error; | |
1524 | ||
1525 | ASSERT(vd->vdev_children == 0); | |
1526 | ||
1527 | if (smo->smo_object == 0) | |
1528 | return (0); | |
1529 | ||
1530 | if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) | |
1531 | return (error); | |
1532 | ||
1533 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1534 | bcopy(db->db_data, smo, sizeof (*smo)); | |
1535 | dmu_buf_rele(db, FTAG); | |
1536 | ||
1537 | mutex_enter(&vd->vdev_dtl_lock); | |
fb5f0bc8 BB |
1538 | error = space_map_load(&vd->vdev_dtl[DTL_MISSING], |
1539 | NULL, SM_ALLOC, smo, mos); | |
34dc7c2f BB |
1540 | mutex_exit(&vd->vdev_dtl_lock); |
1541 | ||
1542 | return (error); | |
1543 | } | |
1544 | ||
1545 | void | |
1546 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
1547 | { | |
1548 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 BB |
1549 | space_map_obj_t *smo = &vd->vdev_dtl_smo; |
1550 | space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; | |
34dc7c2f BB |
1551 | objset_t *mos = spa->spa_meta_objset; |
1552 | space_map_t smsync; | |
1553 | kmutex_t smlock; | |
1554 | dmu_buf_t *db; | |
1555 | dmu_tx_t *tx; | |
1556 | ||
34dc7c2f BB |
1557 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); |
1558 | ||
1559 | if (vd->vdev_detached) { | |
1560 | if (smo->smo_object != 0) { | |
1561 | int err = dmu_object_free(mos, smo->smo_object, tx); | |
1562 | ASSERT3U(err, ==, 0); | |
1563 | smo->smo_object = 0; | |
1564 | } | |
1565 | dmu_tx_commit(tx); | |
34dc7c2f BB |
1566 | return; |
1567 | } | |
1568 | ||
1569 | if (smo->smo_object == 0) { | |
1570 | ASSERT(smo->smo_objsize == 0); | |
1571 | ASSERT(smo->smo_alloc == 0); | |
1572 | smo->smo_object = dmu_object_alloc(mos, | |
1573 | DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, | |
1574 | DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); | |
1575 | ASSERT(smo->smo_object != 0); | |
1576 | vdev_config_dirty(vd->vdev_top); | |
1577 | } | |
1578 | ||
1579 | mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); | |
1580 | ||
1581 | space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, | |
1582 | &smlock); | |
1583 | ||
1584 | mutex_enter(&smlock); | |
1585 | ||
1586 | mutex_enter(&vd->vdev_dtl_lock); | |
1587 | space_map_walk(sm, space_map_add, &smsync); | |
1588 | mutex_exit(&vd->vdev_dtl_lock); | |
1589 | ||
1590 | space_map_truncate(smo, mos, tx); | |
1591 | space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); | |
1592 | ||
1593 | space_map_destroy(&smsync); | |
1594 | ||
1595 | mutex_exit(&smlock); | |
1596 | mutex_destroy(&smlock); | |
1597 | ||
1598 | VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); | |
1599 | dmu_buf_will_dirty(db, tx); | |
1600 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1601 | bcopy(smo, db->db_data, sizeof (*smo)); | |
1602 | dmu_buf_rele(db, FTAG); | |
1603 | ||
1604 | dmu_tx_commit(tx); | |
1605 | } | |
1606 | ||
fb5f0bc8 BB |
1607 | /* |
1608 | * Determine whether the specified vdev can be offlined/detached/removed | |
1609 | * without losing data. | |
1610 | */ | |
1611 | boolean_t | |
1612 | vdev_dtl_required(vdev_t *vd) | |
1613 | { | |
1614 | spa_t *spa = vd->vdev_spa; | |
1615 | vdev_t *tvd = vd->vdev_top; | |
1616 | uint8_t cant_read = vd->vdev_cant_read; | |
1617 | boolean_t required; | |
1618 | ||
1619 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1620 | ||
1621 | if (vd == spa->spa_root_vdev || vd == tvd) | |
1622 | return (B_TRUE); | |
1623 | ||
1624 | /* | |
1625 | * Temporarily mark the device as unreadable, and then determine | |
1626 | * whether this results in any DTL outages in the top-level vdev. | |
1627 | * If not, we can safely offline/detach/remove the device. | |
1628 | */ | |
1629 | vd->vdev_cant_read = B_TRUE; | |
1630 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
1631 | required = !vdev_dtl_empty(tvd, DTL_OUTAGE); | |
1632 | vd->vdev_cant_read = cant_read; | |
1633 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
1634 | ||
1635 | return (required); | |
1636 | } | |
1637 | ||
b128c09f BB |
1638 | /* |
1639 | * Determine if resilver is needed, and if so the txg range. | |
1640 | */ | |
1641 | boolean_t | |
1642 | vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) | |
1643 | { | |
1644 | boolean_t needed = B_FALSE; | |
1645 | uint64_t thismin = UINT64_MAX; | |
1646 | uint64_t thismax = 0; | |
1647 | ||
1648 | if (vd->vdev_children == 0) { | |
1649 | mutex_enter(&vd->vdev_dtl_lock); | |
fb5f0bc8 BB |
1650 | if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && |
1651 | vdev_writeable(vd)) { | |
b128c09f BB |
1652 | space_seg_t *ss; |
1653 | ||
fb5f0bc8 | 1654 | ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); |
b128c09f | 1655 | thismin = ss->ss_start - 1; |
fb5f0bc8 | 1656 | ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); |
b128c09f BB |
1657 | thismax = ss->ss_end; |
1658 | needed = B_TRUE; | |
1659 | } | |
1660 | mutex_exit(&vd->vdev_dtl_lock); | |
1661 | } else { | |
fb5f0bc8 | 1662 | for (int c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
1663 | vdev_t *cvd = vd->vdev_child[c]; |
1664 | uint64_t cmin, cmax; | |
1665 | ||
1666 | if (vdev_resilver_needed(cvd, &cmin, &cmax)) { | |
1667 | thismin = MIN(thismin, cmin); | |
1668 | thismax = MAX(thismax, cmax); | |
1669 | needed = B_TRUE; | |
1670 | } | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | if (needed && minp) { | |
1675 | *minp = thismin; | |
1676 | *maxp = thismax; | |
1677 | } | |
1678 | return (needed); | |
1679 | } | |
1680 | ||
34dc7c2f BB |
1681 | void |
1682 | vdev_load(vdev_t *vd) | |
1683 | { | |
34dc7c2f BB |
1684 | /* |
1685 | * Recursively load all children. | |
1686 | */ | |
fb5f0bc8 | 1687 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
1688 | vdev_load(vd->vdev_child[c]); |
1689 | ||
1690 | /* | |
1691 | * If this is a top-level vdev, initialize its metaslabs. | |
1692 | */ | |
1693 | if (vd == vd->vdev_top && | |
1694 | (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || | |
1695 | vdev_metaslab_init(vd, 0) != 0)) | |
1696 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1697 | VDEV_AUX_CORRUPT_DATA); | |
1698 | ||
1699 | /* | |
1700 | * If this is a leaf vdev, load its DTL. | |
1701 | */ | |
1702 | if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) | |
1703 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1704 | VDEV_AUX_CORRUPT_DATA); | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * The special vdev case is used for hot spares and l2cache devices. Its | |
1709 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
1710 | * we make sure that we can open the underlying device, then try to read the | |
1711 | * label, and make sure that the label is sane and that it hasn't been | |
1712 | * repurposed to another pool. | |
1713 | */ | |
1714 | int | |
1715 | vdev_validate_aux(vdev_t *vd) | |
1716 | { | |
1717 | nvlist_t *label; | |
1718 | uint64_t guid, version; | |
1719 | uint64_t state; | |
1720 | ||
b128c09f BB |
1721 | if (!vdev_readable(vd)) |
1722 | return (0); | |
1723 | ||
34dc7c2f BB |
1724 | if ((label = vdev_label_read_config(vd)) == NULL) { |
1725 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1726 | VDEV_AUX_CORRUPT_DATA); | |
1727 | return (-1); | |
1728 | } | |
1729 | ||
1730 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
1731 | version > SPA_VERSION || | |
1732 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || | |
1733 | guid != vd->vdev_guid || | |
1734 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
1735 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1736 | VDEV_AUX_CORRUPT_DATA); | |
1737 | nvlist_free(label); | |
1738 | return (-1); | |
1739 | } | |
1740 | ||
1741 | /* | |
1742 | * We don't actually check the pool state here. If it's in fact in | |
1743 | * use by another pool, we update this fact on the fly when requested. | |
1744 | */ | |
1745 | nvlist_free(label); | |
1746 | return (0); | |
1747 | } | |
1748 | ||
1749 | void | |
1750 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
1751 | { | |
1752 | metaslab_t *msp; | |
1753 | ||
34dc7c2f BB |
1754 | while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) |
1755 | metaslab_sync_done(msp, txg); | |
1756 | } | |
1757 | ||
1758 | void | |
1759 | vdev_sync(vdev_t *vd, uint64_t txg) | |
1760 | { | |
1761 | spa_t *spa = vd->vdev_spa; | |
1762 | vdev_t *lvd; | |
1763 | metaslab_t *msp; | |
1764 | dmu_tx_t *tx; | |
1765 | ||
34dc7c2f BB |
1766 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { |
1767 | ASSERT(vd == vd->vdev_top); | |
1768 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1769 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
1770 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
1771 | ASSERT(vd->vdev_ms_array != 0); | |
1772 | vdev_config_dirty(vd); | |
1773 | dmu_tx_commit(tx); | |
1774 | } | |
1775 | ||
1776 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { | |
1777 | metaslab_sync(msp, txg); | |
1778 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
1779 | } | |
1780 | ||
1781 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
1782 | vdev_dtl_sync(lvd, txg); | |
1783 | ||
1784 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); | |
1785 | } | |
1786 | ||
1787 | uint64_t | |
1788 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
1789 | { | |
1790 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
1791 | } | |
1792 | ||
34dc7c2f BB |
1793 | /* |
1794 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
1795 | * not be opened, and no I/O is attempted. | |
1796 | */ | |
1797 | int | |
1798 | vdev_fault(spa_t *spa, uint64_t guid) | |
1799 | { | |
b128c09f | 1800 | vdev_t *vd; |
34dc7c2f | 1801 | |
b128c09f | 1802 | spa_vdev_state_enter(spa); |
34dc7c2f | 1803 | |
b128c09f BB |
1804 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1805 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 1806 | |
34dc7c2f | 1807 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 1808 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1809 | |
1810 | /* | |
1811 | * Faulted state takes precedence over degraded. | |
1812 | */ | |
1813 | vd->vdev_faulted = 1ULL; | |
1814 | vd->vdev_degraded = 0ULL; | |
b128c09f | 1815 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, VDEV_AUX_ERR_EXCEEDED); |
34dc7c2f BB |
1816 | |
1817 | /* | |
b128c09f | 1818 | * If marking the vdev as faulted cause the top-level vdev to become |
34dc7c2f BB |
1819 | * unavailable, then back off and simply mark the vdev as degraded |
1820 | * instead. | |
1821 | */ | |
b128c09f | 1822 | if (vdev_is_dead(vd->vdev_top) && vd->vdev_aux == NULL) { |
34dc7c2f BB |
1823 | vd->vdev_degraded = 1ULL; |
1824 | vd->vdev_faulted = 0ULL; | |
1825 | ||
1826 | /* | |
1827 | * If we reopen the device and it's not dead, only then do we | |
1828 | * mark it degraded. | |
1829 | */ | |
1830 | vdev_reopen(vd); | |
1831 | ||
1832 | if (vdev_readable(vd)) { | |
1833 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1834 | VDEV_AUX_ERR_EXCEEDED); | |
1835 | } | |
1836 | } | |
1837 | ||
b128c09f | 1838 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1839 | } |
1840 | ||
1841 | /* | |
1842 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
1843 | * user that something is wrong. The vdev continues to operate as normal as far | |
1844 | * as I/O is concerned. | |
1845 | */ | |
1846 | int | |
1847 | vdev_degrade(spa_t *spa, uint64_t guid) | |
1848 | { | |
b128c09f | 1849 | vdev_t *vd; |
34dc7c2f | 1850 | |
b128c09f | 1851 | spa_vdev_state_enter(spa); |
34dc7c2f | 1852 | |
b128c09f BB |
1853 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1854 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 1855 | |
34dc7c2f | 1856 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 1857 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1858 | |
1859 | /* | |
1860 | * If the vdev is already faulted, then don't do anything. | |
1861 | */ | |
b128c09f BB |
1862 | if (vd->vdev_faulted || vd->vdev_degraded) |
1863 | return (spa_vdev_state_exit(spa, NULL, 0)); | |
34dc7c2f BB |
1864 | |
1865 | vd->vdev_degraded = 1ULL; | |
1866 | if (!vdev_is_dead(vd)) | |
1867 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1868 | VDEV_AUX_ERR_EXCEEDED); | |
34dc7c2f | 1869 | |
b128c09f | 1870 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1871 | } |
1872 | ||
1873 | /* | |
1874 | * Online the given vdev. If 'unspare' is set, it implies two things. First, | |
1875 | * any attached spare device should be detached when the device finishes | |
1876 | * resilvering. Second, the online should be treated like a 'test' online case, | |
1877 | * so no FMA events are generated if the device fails to open. | |
1878 | */ | |
1879 | int | |
b128c09f | 1880 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) |
34dc7c2f | 1881 | { |
b128c09f | 1882 | vdev_t *vd; |
34dc7c2f | 1883 | |
b128c09f | 1884 | spa_vdev_state_enter(spa); |
34dc7c2f | 1885 | |
b128c09f BB |
1886 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1887 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
1888 | |
1889 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 1890 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1891 | |
1892 | vd->vdev_offline = B_FALSE; | |
1893 | vd->vdev_tmpoffline = B_FALSE; | |
b128c09f BB |
1894 | vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); |
1895 | vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); | |
34dc7c2f BB |
1896 | vdev_reopen(vd->vdev_top); |
1897 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; | |
1898 | ||
1899 | if (newstate) | |
1900 | *newstate = vd->vdev_state; | |
1901 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
1902 | !vdev_is_dead(vd) && vd->vdev_parent && | |
1903 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
1904 | vd->vdev_parent->vdev_child[0] == vd) | |
1905 | vd->vdev_unspare = B_TRUE; | |
1906 | ||
fb5f0bc8 | 1907 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1908 | } |
1909 | ||
1910 | int | |
1911 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
1912 | { | |
b128c09f | 1913 | vdev_t *vd; |
34dc7c2f | 1914 | |
b128c09f | 1915 | spa_vdev_state_enter(spa); |
34dc7c2f | 1916 | |
b128c09f BB |
1917 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1918 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
1919 | |
1920 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 1921 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1922 | |
1923 | /* | |
1924 | * If the device isn't already offline, try to offline it. | |
1925 | */ | |
1926 | if (!vd->vdev_offline) { | |
1927 | /* | |
fb5f0bc8 BB |
1928 | * If this device has the only valid copy of some data, |
1929 | * don't allow it to be offlined. | |
34dc7c2f | 1930 | */ |
fb5f0bc8 | 1931 | if (vd->vdev_aux == NULL && vdev_dtl_required(vd)) |
b128c09f | 1932 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f BB |
1933 | |
1934 | /* | |
1935 | * Offline this device and reopen its top-level vdev. | |
1936 | * If this action results in the top-level vdev becoming | |
1937 | * unusable, undo it and fail the request. | |
1938 | */ | |
1939 | vd->vdev_offline = B_TRUE; | |
1940 | vdev_reopen(vd->vdev_top); | |
fb5f0bc8 | 1941 | if (vd->vdev_aux == NULL && vdev_is_dead(vd->vdev_top)) { |
34dc7c2f BB |
1942 | vd->vdev_offline = B_FALSE; |
1943 | vdev_reopen(vd->vdev_top); | |
b128c09f | 1944 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f BB |
1945 | } |
1946 | } | |
1947 | ||
b128c09f | 1948 | vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); |
34dc7c2f | 1949 | |
b128c09f | 1950 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1951 | } |
1952 | ||
1953 | /* | |
1954 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
1955 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
1956 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
34dc7c2f BB |
1957 | */ |
1958 | void | |
b128c09f | 1959 | vdev_clear(spa_t *spa, vdev_t *vd) |
34dc7c2f | 1960 | { |
b128c09f BB |
1961 | vdev_t *rvd = spa->spa_root_vdev; |
1962 | ||
1963 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
1964 | |
1965 | if (vd == NULL) | |
b128c09f | 1966 | vd = rvd; |
34dc7c2f BB |
1967 | |
1968 | vd->vdev_stat.vs_read_errors = 0; | |
1969 | vd->vdev_stat.vs_write_errors = 0; | |
1970 | vd->vdev_stat.vs_checksum_errors = 0; | |
34dc7c2f | 1971 | |
b128c09f BB |
1972 | for (int c = 0; c < vd->vdev_children; c++) |
1973 | vdev_clear(spa, vd->vdev_child[c]); | |
34dc7c2f BB |
1974 | |
1975 | /* | |
b128c09f BB |
1976 | * If we're in the FAULTED state or have experienced failed I/O, then |
1977 | * clear the persistent state and attempt to reopen the device. We | |
1978 | * also mark the vdev config dirty, so that the new faulted state is | |
1979 | * written out to disk. | |
34dc7c2f | 1980 | */ |
b128c09f BB |
1981 | if (vd->vdev_faulted || vd->vdev_degraded || |
1982 | !vdev_readable(vd) || !vdev_writeable(vd)) { | |
1983 | ||
34dc7c2f | 1984 | vd->vdev_faulted = vd->vdev_degraded = 0; |
b128c09f BB |
1985 | vd->vdev_cant_read = B_FALSE; |
1986 | vd->vdev_cant_write = B_FALSE; | |
1987 | ||
34dc7c2f | 1988 | vdev_reopen(vd); |
34dc7c2f | 1989 | |
b128c09f BB |
1990 | if (vd != rvd) |
1991 | vdev_state_dirty(vd->vdev_top); | |
1992 | ||
1993 | if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) | |
34dc7c2f BB |
1994 | spa_async_request(spa, SPA_ASYNC_RESILVER); |
1995 | ||
1996 | spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); | |
1997 | } | |
1998 | } | |
1999 | ||
b128c09f BB |
2000 | boolean_t |
2001 | vdev_is_dead(vdev_t *vd) | |
2002 | { | |
2003 | return (vd->vdev_state < VDEV_STATE_DEGRADED); | |
2004 | } | |
2005 | ||
2006 | boolean_t | |
34dc7c2f BB |
2007 | vdev_readable(vdev_t *vd) |
2008 | { | |
b128c09f | 2009 | return (!vdev_is_dead(vd) && !vd->vdev_cant_read); |
34dc7c2f BB |
2010 | } |
2011 | ||
b128c09f | 2012 | boolean_t |
34dc7c2f BB |
2013 | vdev_writeable(vdev_t *vd) |
2014 | { | |
b128c09f | 2015 | return (!vdev_is_dead(vd) && !vd->vdev_cant_write); |
34dc7c2f BB |
2016 | } |
2017 | ||
b128c09f BB |
2018 | boolean_t |
2019 | vdev_allocatable(vdev_t *vd) | |
34dc7c2f | 2020 | { |
fb5f0bc8 BB |
2021 | uint64_t state = vd->vdev_state; |
2022 | ||
b128c09f | 2023 | /* |
fb5f0bc8 | 2024 | * We currently allow allocations from vdevs which may be in the |
b128c09f BB |
2025 | * process of reopening (i.e. VDEV_STATE_CLOSED). If the device |
2026 | * fails to reopen then we'll catch it later when we're holding | |
fb5f0bc8 BB |
2027 | * the proper locks. Note that we have to get the vdev state |
2028 | * in a local variable because although it changes atomically, | |
2029 | * we're asking two separate questions about it. | |
b128c09f | 2030 | */ |
fb5f0bc8 | 2031 | return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && |
b128c09f | 2032 | !vd->vdev_cant_write); |
34dc7c2f BB |
2033 | } |
2034 | ||
b128c09f BB |
2035 | boolean_t |
2036 | vdev_accessible(vdev_t *vd, zio_t *zio) | |
34dc7c2f | 2037 | { |
b128c09f | 2038 | ASSERT(zio->io_vd == vd); |
34dc7c2f | 2039 | |
b128c09f BB |
2040 | if (vdev_is_dead(vd) || vd->vdev_remove_wanted) |
2041 | return (B_FALSE); | |
34dc7c2f | 2042 | |
b128c09f BB |
2043 | if (zio->io_type == ZIO_TYPE_READ) |
2044 | return (!vd->vdev_cant_read); | |
34dc7c2f | 2045 | |
b128c09f BB |
2046 | if (zio->io_type == ZIO_TYPE_WRITE) |
2047 | return (!vd->vdev_cant_write); | |
34dc7c2f | 2048 | |
b128c09f | 2049 | return (B_TRUE); |
34dc7c2f BB |
2050 | } |
2051 | ||
2052 | /* | |
2053 | * Get statistics for the given vdev. | |
2054 | */ | |
2055 | void | |
2056 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
2057 | { | |
2058 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
34dc7c2f BB |
2059 | |
2060 | mutex_enter(&vd->vdev_stat_lock); | |
2061 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
b128c09f | 2062 | vs->vs_scrub_errors = vd->vdev_spa->spa_scrub_errors; |
34dc7c2f BB |
2063 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; |
2064 | vs->vs_state = vd->vdev_state; | |
2065 | vs->vs_rsize = vdev_get_rsize(vd); | |
2066 | mutex_exit(&vd->vdev_stat_lock); | |
2067 | ||
2068 | /* | |
2069 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
2070 | * over all top-level vdevs (i.e. the direct children of the root). | |
2071 | */ | |
2072 | if (vd == rvd) { | |
b128c09f | 2073 | for (int c = 0; c < rvd->vdev_children; c++) { |
34dc7c2f BB |
2074 | vdev_t *cvd = rvd->vdev_child[c]; |
2075 | vdev_stat_t *cvs = &cvd->vdev_stat; | |
2076 | ||
2077 | mutex_enter(&vd->vdev_stat_lock); | |
b128c09f | 2078 | for (int t = 0; t < ZIO_TYPES; t++) { |
34dc7c2f BB |
2079 | vs->vs_ops[t] += cvs->vs_ops[t]; |
2080 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
2081 | } | |
34dc7c2f | 2082 | vs->vs_scrub_examined += cvs->vs_scrub_examined; |
34dc7c2f BB |
2083 | mutex_exit(&vd->vdev_stat_lock); |
2084 | } | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | void | |
2089 | vdev_clear_stats(vdev_t *vd) | |
2090 | { | |
2091 | mutex_enter(&vd->vdev_stat_lock); | |
2092 | vd->vdev_stat.vs_space = 0; | |
2093 | vd->vdev_stat.vs_dspace = 0; | |
2094 | vd->vdev_stat.vs_alloc = 0; | |
2095 | mutex_exit(&vd->vdev_stat_lock); | |
2096 | } | |
2097 | ||
2098 | void | |
b128c09f | 2099 | vdev_stat_update(zio_t *zio, uint64_t psize) |
34dc7c2f | 2100 | { |
fb5f0bc8 BB |
2101 | spa_t *spa = zio->io_spa; |
2102 | vdev_t *rvd = spa->spa_root_vdev; | |
b128c09f | 2103 | vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; |
34dc7c2f BB |
2104 | vdev_t *pvd; |
2105 | uint64_t txg = zio->io_txg; | |
2106 | vdev_stat_t *vs = &vd->vdev_stat; | |
2107 | zio_type_t type = zio->io_type; | |
2108 | int flags = zio->io_flags; | |
2109 | ||
b128c09f BB |
2110 | /* |
2111 | * If this i/o is a gang leader, it didn't do any actual work. | |
2112 | */ | |
2113 | if (zio->io_gang_tree) | |
2114 | return; | |
2115 | ||
34dc7c2f | 2116 | if (zio->io_error == 0) { |
b128c09f BB |
2117 | /* |
2118 | * If this is a root i/o, don't count it -- we've already | |
2119 | * counted the top-level vdevs, and vdev_get_stats() will | |
2120 | * aggregate them when asked. This reduces contention on | |
2121 | * the root vdev_stat_lock and implicitly handles blocks | |
2122 | * that compress away to holes, for which there is no i/o. | |
2123 | * (Holes never create vdev children, so all the counters | |
2124 | * remain zero, which is what we want.) | |
2125 | * | |
2126 | * Note: this only applies to successful i/o (io_error == 0) | |
2127 | * because unlike i/o counts, errors are not additive. | |
2128 | * When reading a ditto block, for example, failure of | |
2129 | * one top-level vdev does not imply a root-level error. | |
2130 | */ | |
2131 | if (vd == rvd) | |
2132 | return; | |
2133 | ||
2134 | ASSERT(vd == zio->io_vd); | |
fb5f0bc8 BB |
2135 | |
2136 | if (flags & ZIO_FLAG_IO_BYPASS) | |
2137 | return; | |
2138 | ||
2139 | mutex_enter(&vd->vdev_stat_lock); | |
2140 | ||
b128c09f | 2141 | if (flags & ZIO_FLAG_IO_REPAIR) { |
34dc7c2f | 2142 | if (flags & ZIO_FLAG_SCRUB_THREAD) |
b128c09f | 2143 | vs->vs_scrub_repaired += psize; |
fb5f0bc8 | 2144 | if (flags & ZIO_FLAG_SELF_HEAL) |
b128c09f | 2145 | vs->vs_self_healed += psize; |
34dc7c2f | 2146 | } |
fb5f0bc8 BB |
2147 | |
2148 | vs->vs_ops[type]++; | |
2149 | vs->vs_bytes[type] += psize; | |
2150 | ||
2151 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f BB |
2152 | return; |
2153 | } | |
2154 | ||
2155 | if (flags & ZIO_FLAG_SPECULATIVE) | |
2156 | return; | |
2157 | ||
b128c09f BB |
2158 | mutex_enter(&vd->vdev_stat_lock); |
2159 | if (type == ZIO_TYPE_READ) { | |
2160 | if (zio->io_error == ECKSUM) | |
2161 | vs->vs_checksum_errors++; | |
2162 | else | |
2163 | vs->vs_read_errors++; | |
34dc7c2f | 2164 | } |
b128c09f BB |
2165 | if (type == ZIO_TYPE_WRITE) |
2166 | vs->vs_write_errors++; | |
2167 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f | 2168 | |
fb5f0bc8 BB |
2169 | if (type == ZIO_TYPE_WRITE && txg != 0 && |
2170 | (!(flags & ZIO_FLAG_IO_REPAIR) || | |
2171 | (flags & ZIO_FLAG_SCRUB_THREAD))) { | |
2172 | /* | |
2173 | * This is either a normal write (not a repair), or it's a | |
2174 | * repair induced by the scrub thread. In the normal case, | |
2175 | * we commit the DTL change in the same txg as the block | |
2176 | * was born. In the scrub-induced repair case, we know that | |
2177 | * scrubs run in first-pass syncing context, so we commit | |
2178 | * the DTL change in spa->spa_syncing_txg. | |
2179 | * | |
2180 | * We currently do not make DTL entries for failed spontaneous | |
2181 | * self-healing writes triggered by normal (non-scrubbing) | |
2182 | * reads, because we have no transactional context in which to | |
2183 | * do so -- and it's not clear that it'd be desirable anyway. | |
2184 | */ | |
2185 | if (vd->vdev_ops->vdev_op_leaf) { | |
2186 | uint64_t commit_txg = txg; | |
2187 | if (flags & ZIO_FLAG_SCRUB_THREAD) { | |
2188 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
2189 | ASSERT(spa_sync_pass(spa) == 1); | |
2190 | vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); | |
2191 | commit_txg = spa->spa_syncing_txg; | |
2192 | } | |
2193 | ASSERT(commit_txg >= spa->spa_syncing_txg); | |
2194 | if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) | |
34dc7c2f | 2195 | return; |
fb5f0bc8 BB |
2196 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) |
2197 | vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); | |
2198 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); | |
34dc7c2f | 2199 | } |
fb5f0bc8 BB |
2200 | if (vd != rvd) |
2201 | vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); | |
34dc7c2f BB |
2202 | } |
2203 | } | |
2204 | ||
2205 | void | |
2206 | vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) | |
2207 | { | |
2208 | int c; | |
2209 | vdev_stat_t *vs = &vd->vdev_stat; | |
2210 | ||
2211 | for (c = 0; c < vd->vdev_children; c++) | |
2212 | vdev_scrub_stat_update(vd->vdev_child[c], type, complete); | |
2213 | ||
2214 | mutex_enter(&vd->vdev_stat_lock); | |
2215 | ||
2216 | if (type == POOL_SCRUB_NONE) { | |
2217 | /* | |
2218 | * Update completion and end time. Leave everything else alone | |
2219 | * so we can report what happened during the previous scrub. | |
2220 | */ | |
2221 | vs->vs_scrub_complete = complete; | |
2222 | vs->vs_scrub_end = gethrestime_sec(); | |
2223 | } else { | |
2224 | vs->vs_scrub_type = type; | |
2225 | vs->vs_scrub_complete = 0; | |
2226 | vs->vs_scrub_examined = 0; | |
2227 | vs->vs_scrub_repaired = 0; | |
34dc7c2f BB |
2228 | vs->vs_scrub_start = gethrestime_sec(); |
2229 | vs->vs_scrub_end = 0; | |
2230 | } | |
2231 | ||
2232 | mutex_exit(&vd->vdev_stat_lock); | |
2233 | } | |
2234 | ||
2235 | /* | |
2236 | * Update the in-core space usage stats for this vdev and the root vdev. | |
2237 | */ | |
2238 | void | |
2239 | vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta, | |
2240 | boolean_t update_root) | |
2241 | { | |
2242 | int64_t dspace_delta = space_delta; | |
2243 | spa_t *spa = vd->vdev_spa; | |
2244 | vdev_t *rvd = spa->spa_root_vdev; | |
2245 | ||
2246 | ASSERT(vd == vd->vdev_top); | |
2247 | ||
2248 | /* | |
2249 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
2250 | * factor. We must calculate this here and not at the root vdev | |
2251 | * because the root vdev's psize-to-asize is simply the max of its | |
2252 | * childrens', thus not accurate enough for us. | |
2253 | */ | |
2254 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
2255 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * | |
2256 | vd->vdev_deflate_ratio; | |
2257 | ||
2258 | mutex_enter(&vd->vdev_stat_lock); | |
2259 | vd->vdev_stat.vs_space += space_delta; | |
2260 | vd->vdev_stat.vs_alloc += alloc_delta; | |
2261 | vd->vdev_stat.vs_dspace += dspace_delta; | |
2262 | mutex_exit(&vd->vdev_stat_lock); | |
2263 | ||
2264 | if (update_root) { | |
2265 | ASSERT(rvd == vd->vdev_parent); | |
2266 | ASSERT(vd->vdev_ms_count != 0); | |
2267 | ||
2268 | /* | |
2269 | * Don't count non-normal (e.g. intent log) space as part of | |
2270 | * the pool's capacity. | |
2271 | */ | |
2272 | if (vd->vdev_mg->mg_class != spa->spa_normal_class) | |
2273 | return; | |
2274 | ||
2275 | mutex_enter(&rvd->vdev_stat_lock); | |
2276 | rvd->vdev_stat.vs_space += space_delta; | |
2277 | rvd->vdev_stat.vs_alloc += alloc_delta; | |
2278 | rvd->vdev_stat.vs_dspace += dspace_delta; | |
2279 | mutex_exit(&rvd->vdev_stat_lock); | |
2280 | } | |
2281 | } | |
2282 | ||
2283 | /* | |
2284 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
2285 | * so that it will be written out next time the vdev configuration is synced. | |
2286 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
2287 | */ | |
2288 | void | |
2289 | vdev_config_dirty(vdev_t *vd) | |
2290 | { | |
2291 | spa_t *spa = vd->vdev_spa; | |
2292 | vdev_t *rvd = spa->spa_root_vdev; | |
2293 | int c; | |
2294 | ||
2295 | /* | |
b128c09f BB |
2296 | * If this is an aux vdev (as with l2cache devices), then we update the |
2297 | * vdev config manually and set the sync flag. | |
2298 | */ | |
2299 | if (vd->vdev_aux != NULL) { | |
2300 | spa_aux_vdev_t *sav = vd->vdev_aux; | |
2301 | nvlist_t **aux; | |
2302 | uint_t naux; | |
2303 | ||
2304 | for (c = 0; c < sav->sav_count; c++) { | |
2305 | if (sav->sav_vdevs[c] == vd) | |
2306 | break; | |
2307 | } | |
2308 | ||
2309 | if (c == sav->sav_count) { | |
2310 | /* | |
2311 | * We're being removed. There's nothing more to do. | |
2312 | */ | |
2313 | ASSERT(sav->sav_sync == B_TRUE); | |
2314 | return; | |
2315 | } | |
2316 | ||
2317 | sav->sav_sync = B_TRUE; | |
2318 | ||
2319 | VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, | |
2320 | ZPOOL_CONFIG_L2CACHE, &aux, &naux) == 0); | |
2321 | ||
2322 | ASSERT(c < naux); | |
2323 | ||
2324 | /* | |
2325 | * Setting the nvlist in the middle if the array is a little | |
2326 | * sketchy, but it will work. | |
2327 | */ | |
2328 | nvlist_free(aux[c]); | |
2329 | aux[c] = vdev_config_generate(spa, vd, B_TRUE, B_FALSE, B_TRUE); | |
2330 | ||
2331 | return; | |
2332 | } | |
2333 | ||
2334 | /* | |
2335 | * The dirty list is protected by the SCL_CONFIG lock. The caller | |
2336 | * must either hold SCL_CONFIG as writer, or must be the sync thread | |
2337 | * (which holds SCL_CONFIG as reader). There's only one sync thread, | |
34dc7c2f BB |
2338 | * so this is sufficient to ensure mutual exclusion. |
2339 | */ | |
b128c09f BB |
2340 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2341 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2342 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f BB |
2343 | |
2344 | if (vd == rvd) { | |
2345 | for (c = 0; c < rvd->vdev_children; c++) | |
2346 | vdev_config_dirty(rvd->vdev_child[c]); | |
2347 | } else { | |
2348 | ASSERT(vd == vd->vdev_top); | |
2349 | ||
b128c09f BB |
2350 | if (!list_link_active(&vd->vdev_config_dirty_node)) |
2351 | list_insert_head(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2352 | } |
2353 | } | |
2354 | ||
2355 | void | |
2356 | vdev_config_clean(vdev_t *vd) | |
2357 | { | |
2358 | spa_t *spa = vd->vdev_spa; | |
2359 | ||
b128c09f BB |
2360 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2361 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2362 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f | 2363 | |
b128c09f BB |
2364 | ASSERT(list_link_active(&vd->vdev_config_dirty_node)); |
2365 | list_remove(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2366 | } |
2367 | ||
b128c09f BB |
2368 | /* |
2369 | * Mark a top-level vdev's state as dirty, so that the next pass of | |
2370 | * spa_sync() can convert this into vdev_config_dirty(). We distinguish | |
2371 | * the state changes from larger config changes because they require | |
2372 | * much less locking, and are often needed for administrative actions. | |
2373 | */ | |
2374 | void | |
2375 | vdev_state_dirty(vdev_t *vd) | |
2376 | { | |
2377 | spa_t *spa = vd->vdev_spa; | |
2378 | ||
2379 | ASSERT(vd == vd->vdev_top); | |
2380 | ||
2381 | /* | |
2382 | * The state list is protected by the SCL_STATE lock. The caller | |
2383 | * must either hold SCL_STATE as writer, or must be the sync thread | |
2384 | * (which holds SCL_STATE as reader). There's only one sync thread, | |
2385 | * so this is sufficient to ensure mutual exclusion. | |
2386 | */ | |
2387 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2388 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2389 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2390 | ||
2391 | if (!list_link_active(&vd->vdev_state_dirty_node)) | |
2392 | list_insert_head(&spa->spa_state_dirty_list, vd); | |
2393 | } | |
2394 | ||
2395 | void | |
2396 | vdev_state_clean(vdev_t *vd) | |
2397 | { | |
2398 | spa_t *spa = vd->vdev_spa; | |
2399 | ||
2400 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2401 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2402 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2403 | ||
2404 | ASSERT(list_link_active(&vd->vdev_state_dirty_node)); | |
2405 | list_remove(&spa->spa_state_dirty_list, vd); | |
2406 | } | |
2407 | ||
2408 | /* | |
2409 | * Propagate vdev state up from children to parent. | |
2410 | */ | |
34dc7c2f BB |
2411 | void |
2412 | vdev_propagate_state(vdev_t *vd) | |
2413 | { | |
fb5f0bc8 BB |
2414 | spa_t *spa = vd->vdev_spa; |
2415 | vdev_t *rvd = spa->spa_root_vdev; | |
34dc7c2f BB |
2416 | int degraded = 0, faulted = 0; |
2417 | int corrupted = 0; | |
2418 | int c; | |
2419 | vdev_t *child; | |
2420 | ||
2421 | if (vd->vdev_children > 0) { | |
2422 | for (c = 0; c < vd->vdev_children; c++) { | |
2423 | child = vd->vdev_child[c]; | |
b128c09f BB |
2424 | |
2425 | if (!vdev_readable(child) || | |
fb5f0bc8 | 2426 | (!vdev_writeable(child) && spa_writeable(spa))) { |
b128c09f BB |
2427 | /* |
2428 | * Root special: if there is a top-level log | |
2429 | * device, treat the root vdev as if it were | |
2430 | * degraded. | |
2431 | */ | |
2432 | if (child->vdev_islog && vd == rvd) | |
2433 | degraded++; | |
2434 | else | |
2435 | faulted++; | |
2436 | } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { | |
34dc7c2f | 2437 | degraded++; |
b128c09f | 2438 | } |
34dc7c2f BB |
2439 | |
2440 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
2441 | corrupted++; | |
2442 | } | |
2443 | ||
2444 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
2445 | ||
2446 | /* | |
b128c09f | 2447 | * Root special: if there is a top-level vdev that cannot be |
34dc7c2f BB |
2448 | * opened due to corrupted metadata, then propagate the root |
2449 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
2450 | * replicas'. | |
2451 | */ | |
2452 | if (corrupted && vd == rvd && | |
2453 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
2454 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2455 | VDEV_AUX_CORRUPT_DATA); | |
2456 | } | |
2457 | ||
b128c09f | 2458 | if (vd->vdev_parent) |
34dc7c2f BB |
2459 | vdev_propagate_state(vd->vdev_parent); |
2460 | } | |
2461 | ||
2462 | /* | |
2463 | * Set a vdev's state. If this is during an open, we don't update the parent | |
2464 | * state, because we're in the process of opening children depth-first. | |
2465 | * Otherwise, we propagate the change to the parent. | |
2466 | * | |
2467 | * If this routine places a device in a faulted state, an appropriate ereport is | |
2468 | * generated. | |
2469 | */ | |
2470 | void | |
2471 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
2472 | { | |
2473 | uint64_t save_state; | |
b128c09f | 2474 | spa_t *spa = vd->vdev_spa; |
34dc7c2f BB |
2475 | |
2476 | if (state == vd->vdev_state) { | |
2477 | vd->vdev_stat.vs_aux = aux; | |
2478 | return; | |
2479 | } | |
2480 | ||
2481 | save_state = vd->vdev_state; | |
2482 | ||
2483 | vd->vdev_state = state; | |
2484 | vd->vdev_stat.vs_aux = aux; | |
2485 | ||
2486 | /* | |
2487 | * If we are setting the vdev state to anything but an open state, then | |
2488 | * always close the underlying device. Otherwise, we keep accessible | |
2489 | * but invalid devices open forever. We don't call vdev_close() itself, | |
2490 | * because that implies some extra checks (offline, etc) that we don't | |
2491 | * want here. This is limited to leaf devices, because otherwise | |
2492 | * closing the device will affect other children. | |
2493 | */ | |
b128c09f | 2494 | if (vdev_is_dead(vd) && vd->vdev_ops->vdev_op_leaf) |
34dc7c2f BB |
2495 | vd->vdev_ops->vdev_op_close(vd); |
2496 | ||
2497 | if (vd->vdev_removed && | |
2498 | state == VDEV_STATE_CANT_OPEN && | |
2499 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
2500 | /* | |
2501 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
2502 | * device was previously marked removed and someone attempted to | |
2503 | * reopen it. If this failed due to a nonexistent device, then | |
2504 | * keep the device in the REMOVED state. We also let this be if | |
2505 | * it is one of our special test online cases, which is only | |
2506 | * attempting to online the device and shouldn't generate an FMA | |
2507 | * fault. | |
2508 | */ | |
2509 | vd->vdev_state = VDEV_STATE_REMOVED; | |
2510 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
2511 | } else if (state == VDEV_STATE_REMOVED) { | |
2512 | /* | |
2513 | * Indicate to the ZFS DE that this device has been removed, and | |
2514 | * any recent errors should be ignored. | |
2515 | */ | |
b128c09f | 2516 | zfs_post_remove(spa, vd); |
34dc7c2f BB |
2517 | vd->vdev_removed = B_TRUE; |
2518 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
2519 | /* | |
2520 | * If we fail to open a vdev during an import, we mark it as | |
2521 | * "not available", which signifies that it was never there to | |
2522 | * begin with. Failure to open such a device is not considered | |
2523 | * an error. | |
2524 | */ | |
b128c09f BB |
2525 | if (spa->spa_load_state == SPA_LOAD_IMPORT && |
2526 | !spa->spa_import_faulted && | |
34dc7c2f BB |
2527 | vd->vdev_ops->vdev_op_leaf) |
2528 | vd->vdev_not_present = 1; | |
2529 | ||
2530 | /* | |
2531 | * Post the appropriate ereport. If the 'prevstate' field is | |
2532 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
2533 | * that this is part of a vdev_reopen(). In this case, we don't | |
2534 | * want to post the ereport if the device was already in the | |
2535 | * CANT_OPEN state beforehand. | |
2536 | * | |
2537 | * If the 'checkremove' flag is set, then this is an attempt to | |
2538 | * online the device in response to an insertion event. If we | |
2539 | * hit this case, then we have detected an insertion event for a | |
2540 | * faulted or offline device that wasn't in the removed state. | |
2541 | * In this scenario, we don't post an ereport because we are | |
2542 | * about to replace the device, or attempt an online with | |
2543 | * vdev_forcefault, which will generate the fault for us. | |
2544 | */ | |
2545 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
2546 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
b128c09f | 2547 | vd != spa->spa_root_vdev) { |
34dc7c2f BB |
2548 | const char *class; |
2549 | ||
2550 | switch (aux) { | |
2551 | case VDEV_AUX_OPEN_FAILED: | |
2552 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
2553 | break; | |
2554 | case VDEV_AUX_CORRUPT_DATA: | |
2555 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
2556 | break; | |
2557 | case VDEV_AUX_NO_REPLICAS: | |
2558 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
2559 | break; | |
2560 | case VDEV_AUX_BAD_GUID_SUM: | |
2561 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
2562 | break; | |
2563 | case VDEV_AUX_TOO_SMALL: | |
2564 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
2565 | break; | |
2566 | case VDEV_AUX_BAD_LABEL: | |
2567 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
2568 | break; | |
b128c09f BB |
2569 | case VDEV_AUX_IO_FAILURE: |
2570 | class = FM_EREPORT_ZFS_IO_FAILURE; | |
2571 | break; | |
34dc7c2f BB |
2572 | default: |
2573 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
2574 | } | |
2575 | ||
b128c09f | 2576 | zfs_ereport_post(class, spa, vd, NULL, save_state, 0); |
34dc7c2f BB |
2577 | } |
2578 | ||
2579 | /* Erase any notion of persistent removed state */ | |
2580 | vd->vdev_removed = B_FALSE; | |
2581 | } else { | |
2582 | vd->vdev_removed = B_FALSE; | |
2583 | } | |
2584 | ||
2585 | if (!isopen) | |
2586 | vdev_propagate_state(vd); | |
2587 | } | |
b128c09f BB |
2588 | |
2589 | /* | |
2590 | * Check the vdev configuration to ensure that it's capable of supporting | |
2591 | * a root pool. Currently, we do not support RAID-Z or partial configuration. | |
2592 | * In addition, only a single top-level vdev is allowed and none of the leaves | |
2593 | * can be wholedisks. | |
2594 | */ | |
2595 | boolean_t | |
2596 | vdev_is_bootable(vdev_t *vd) | |
2597 | { | |
2598 | int c; | |
2599 | ||
2600 | if (!vd->vdev_ops->vdev_op_leaf) { | |
2601 | char *vdev_type = vd->vdev_ops->vdev_op_type; | |
2602 | ||
2603 | if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && | |
2604 | vd->vdev_children > 1) { | |
2605 | return (B_FALSE); | |
2606 | } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || | |
2607 | strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { | |
2608 | return (B_FALSE); | |
2609 | } | |
2610 | } else if (vd->vdev_wholedisk == 1) { | |
2611 | return (B_FALSE); | |
2612 | } | |
2613 | ||
2614 | for (c = 0; c < vd->vdev_children; c++) { | |
2615 | if (!vdev_is_bootable(vd->vdev_child[c])) | |
2616 | return (B_FALSE); | |
2617 | } | |
2618 | return (B_TRUE); | |
2619 | } |