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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 | /* | |
b128c09f | 23 | * Copyright 2008 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); |
34dc7c2f BB |
319 | space_map_create(&vd->vdev_dtl_map, 0, -1ULL, 0, &vd->vdev_dtl_lock); |
320 | space_map_create(&vd->vdev_dtl_scrub, 0, -1ULL, 0, &vd->vdev_dtl_lock); | |
321 | txg_list_create(&vd->vdev_ms_list, | |
322 | offsetof(struct metaslab, ms_txg_node)); | |
323 | txg_list_create(&vd->vdev_dtl_list, | |
324 | offsetof(struct vdev, vdev_dtl_node)); | |
325 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
326 | vdev_queue_init(vd); | |
327 | vdev_cache_init(vd); | |
328 | ||
329 | return (vd); | |
330 | } | |
331 | ||
332 | /* | |
333 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
334 | * creating a new vdev or loading an existing one - the behavior is slightly | |
335 | * different for each case. | |
336 | */ | |
337 | int | |
338 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
339 | int alloctype) | |
340 | { | |
341 | vdev_ops_t *ops; | |
342 | char *type; | |
343 | uint64_t guid = 0, islog, nparity; | |
344 | vdev_t *vd; | |
345 | ||
b128c09f | 346 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
347 | |
348 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
349 | return (EINVAL); | |
350 | ||
351 | if ((ops = vdev_getops(type)) == NULL) | |
352 | return (EINVAL); | |
353 | ||
354 | /* | |
355 | * If this is a load, get the vdev guid from the nvlist. | |
356 | * Otherwise, vdev_alloc_common() will generate one for us. | |
357 | */ | |
358 | if (alloctype == VDEV_ALLOC_LOAD) { | |
359 | uint64_t label_id; | |
360 | ||
361 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
362 | label_id != id) | |
363 | return (EINVAL); | |
364 | ||
365 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
366 | return (EINVAL); | |
367 | } else if (alloctype == VDEV_ALLOC_SPARE) { | |
368 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
369 | return (EINVAL); | |
370 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { | |
371 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
372 | return (EINVAL); | |
373 | } | |
374 | ||
375 | /* | |
376 | * The first allocated vdev must be of type 'root'. | |
377 | */ | |
378 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
379 | return (EINVAL); | |
380 | ||
381 | /* | |
382 | * Determine whether we're a log vdev. | |
383 | */ | |
384 | islog = 0; | |
385 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
386 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
387 | return (ENOTSUP); | |
388 | ||
389 | /* | |
390 | * Set the nparity property for RAID-Z vdevs. | |
391 | */ | |
392 | nparity = -1ULL; | |
393 | if (ops == &vdev_raidz_ops) { | |
394 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
395 | &nparity) == 0) { | |
396 | /* | |
397 | * Currently, we can only support 2 parity devices. | |
398 | */ | |
399 | if (nparity == 0 || nparity > 2) | |
400 | return (EINVAL); | |
401 | /* | |
402 | * Older versions can only support 1 parity device. | |
403 | */ | |
404 | if (nparity == 2 && | |
405 | spa_version(spa) < SPA_VERSION_RAID6) | |
406 | return (ENOTSUP); | |
407 | } else { | |
408 | /* | |
409 | * We require the parity to be specified for SPAs that | |
410 | * support multiple parity levels. | |
411 | */ | |
412 | if (spa_version(spa) >= SPA_VERSION_RAID6) | |
413 | return (EINVAL); | |
414 | /* | |
415 | * Otherwise, we default to 1 parity device for RAID-Z. | |
416 | */ | |
417 | nparity = 1; | |
418 | } | |
419 | } else { | |
420 | nparity = 0; | |
421 | } | |
422 | ASSERT(nparity != -1ULL); | |
423 | ||
424 | vd = vdev_alloc_common(spa, id, guid, ops); | |
425 | ||
426 | vd->vdev_islog = islog; | |
427 | vd->vdev_nparity = nparity; | |
428 | ||
429 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
430 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
431 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) | |
432 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
433 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
434 | &vd->vdev_physpath) == 0) | |
435 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
436 | ||
437 | /* | |
438 | * Set the whole_disk property. If it's not specified, leave the value | |
439 | * as -1. | |
440 | */ | |
441 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
442 | &vd->vdev_wholedisk) != 0) | |
443 | vd->vdev_wholedisk = -1ULL; | |
444 | ||
445 | /* | |
446 | * Look for the 'not present' flag. This will only be set if the device | |
447 | * was not present at the time of import. | |
448 | */ | |
b128c09f BB |
449 | if (!spa->spa_import_faulted) |
450 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, | |
451 | &vd->vdev_not_present); | |
34dc7c2f BB |
452 | |
453 | /* | |
454 | * Get the alignment requirement. | |
455 | */ | |
456 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
457 | ||
458 | /* | |
459 | * If we're a top-level vdev, try to load the allocation parameters. | |
460 | */ | |
461 | if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { | |
462 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, | |
463 | &vd->vdev_ms_array); | |
464 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
465 | &vd->vdev_ms_shift); | |
466 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
467 | &vd->vdev_asize); | |
468 | } | |
469 | ||
470 | /* | |
471 | * If we're a leaf vdev, try to load the DTL object and other state. | |
472 | */ | |
b128c09f BB |
473 | if (vd->vdev_ops->vdev_op_leaf && |
474 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE)) { | |
475 | if (alloctype == VDEV_ALLOC_LOAD) { | |
476 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
477 | &vd->vdev_dtl.smo_object); | |
478 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, | |
479 | &vd->vdev_unspare); | |
480 | } | |
34dc7c2f BB |
481 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, |
482 | &vd->vdev_offline); | |
b128c09f | 483 | |
34dc7c2f BB |
484 | /* |
485 | * When importing a pool, we want to ignore the persistent fault | |
486 | * state, as the diagnosis made on another system may not be | |
487 | * valid in the current context. | |
488 | */ | |
489 | if (spa->spa_load_state == SPA_LOAD_OPEN) { | |
490 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, | |
491 | &vd->vdev_faulted); | |
492 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
493 | &vd->vdev_degraded); | |
494 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
495 | &vd->vdev_removed); | |
496 | } | |
497 | } | |
498 | ||
499 | /* | |
500 | * Add ourselves to the parent's list of children. | |
501 | */ | |
502 | vdev_add_child(parent, vd); | |
503 | ||
504 | *vdp = vd; | |
505 | ||
506 | return (0); | |
507 | } | |
508 | ||
509 | void | |
510 | vdev_free(vdev_t *vd) | |
511 | { | |
512 | int c; | |
513 | spa_t *spa = vd->vdev_spa; | |
514 | ||
515 | /* | |
516 | * vdev_free() implies closing the vdev first. This is simpler than | |
517 | * trying to ensure complicated semantics for all callers. | |
518 | */ | |
519 | vdev_close(vd); | |
520 | ||
b128c09f | 521 | ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); |
34dc7c2f BB |
522 | |
523 | /* | |
524 | * Free all children. | |
525 | */ | |
526 | for (c = 0; c < vd->vdev_children; c++) | |
527 | vdev_free(vd->vdev_child[c]); | |
528 | ||
529 | ASSERT(vd->vdev_child == NULL); | |
530 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
531 | ||
532 | /* | |
533 | * Discard allocation state. | |
534 | */ | |
535 | if (vd == vd->vdev_top) | |
536 | vdev_metaslab_fini(vd); | |
537 | ||
538 | ASSERT3U(vd->vdev_stat.vs_space, ==, 0); | |
539 | ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); | |
540 | ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); | |
541 | ||
542 | /* | |
543 | * Remove this vdev from its parent's child list. | |
544 | */ | |
545 | vdev_remove_child(vd->vdev_parent, vd); | |
546 | ||
547 | ASSERT(vd->vdev_parent == NULL); | |
548 | ||
549 | /* | |
550 | * Clean up vdev structure. | |
551 | */ | |
552 | vdev_queue_fini(vd); | |
553 | vdev_cache_fini(vd); | |
554 | ||
555 | if (vd->vdev_path) | |
556 | spa_strfree(vd->vdev_path); | |
557 | if (vd->vdev_devid) | |
558 | spa_strfree(vd->vdev_devid); | |
559 | if (vd->vdev_physpath) | |
560 | spa_strfree(vd->vdev_physpath); | |
561 | ||
562 | if (vd->vdev_isspare) | |
563 | spa_spare_remove(vd); | |
564 | if (vd->vdev_isl2cache) | |
565 | spa_l2cache_remove(vd); | |
566 | ||
567 | txg_list_destroy(&vd->vdev_ms_list); | |
568 | txg_list_destroy(&vd->vdev_dtl_list); | |
569 | mutex_enter(&vd->vdev_dtl_lock); | |
570 | space_map_unload(&vd->vdev_dtl_map); | |
571 | space_map_destroy(&vd->vdev_dtl_map); | |
572 | space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); | |
573 | space_map_destroy(&vd->vdev_dtl_scrub); | |
574 | mutex_exit(&vd->vdev_dtl_lock); | |
575 | mutex_destroy(&vd->vdev_dtl_lock); | |
576 | mutex_destroy(&vd->vdev_stat_lock); | |
b128c09f | 577 | mutex_destroy(&vd->vdev_probe_lock); |
34dc7c2f BB |
578 | |
579 | if (vd == spa->spa_root_vdev) | |
580 | spa->spa_root_vdev = NULL; | |
581 | ||
582 | kmem_free(vd, sizeof (vdev_t)); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Transfer top-level vdev state from svd to tvd. | |
587 | */ | |
588 | static void | |
589 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
590 | { | |
591 | spa_t *spa = svd->vdev_spa; | |
592 | metaslab_t *msp; | |
593 | vdev_t *vd; | |
594 | int t; | |
595 | ||
596 | ASSERT(tvd == tvd->vdev_top); | |
597 | ||
598 | tvd->vdev_ms_array = svd->vdev_ms_array; | |
599 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
600 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
601 | ||
602 | svd->vdev_ms_array = 0; | |
603 | svd->vdev_ms_shift = 0; | |
604 | svd->vdev_ms_count = 0; | |
605 | ||
606 | tvd->vdev_mg = svd->vdev_mg; | |
607 | tvd->vdev_ms = svd->vdev_ms; | |
608 | ||
609 | svd->vdev_mg = NULL; | |
610 | svd->vdev_ms = NULL; | |
611 | ||
612 | if (tvd->vdev_mg != NULL) | |
613 | tvd->vdev_mg->mg_vd = tvd; | |
614 | ||
615 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; | |
616 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
617 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
618 | ||
619 | svd->vdev_stat.vs_alloc = 0; | |
620 | svd->vdev_stat.vs_space = 0; | |
621 | svd->vdev_stat.vs_dspace = 0; | |
622 | ||
623 | for (t = 0; t < TXG_SIZE; t++) { | |
624 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
625 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
626 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
627 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
628 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
629 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
630 | } | |
631 | ||
b128c09f | 632 | if (list_link_active(&svd->vdev_config_dirty_node)) { |
34dc7c2f BB |
633 | vdev_config_clean(svd); |
634 | vdev_config_dirty(tvd); | |
635 | } | |
636 | ||
b128c09f BB |
637 | if (list_link_active(&svd->vdev_state_dirty_node)) { |
638 | vdev_state_clean(svd); | |
639 | vdev_state_dirty(tvd); | |
640 | } | |
641 | ||
34dc7c2f BB |
642 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; |
643 | svd->vdev_deflate_ratio = 0; | |
644 | ||
645 | tvd->vdev_islog = svd->vdev_islog; | |
646 | svd->vdev_islog = 0; | |
647 | } | |
648 | ||
649 | static void | |
650 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
651 | { | |
652 | int c; | |
653 | ||
654 | if (vd == NULL) | |
655 | return; | |
656 | ||
657 | vd->vdev_top = tvd; | |
658 | ||
659 | for (c = 0; c < vd->vdev_children; c++) | |
660 | vdev_top_update(tvd, vd->vdev_child[c]); | |
661 | } | |
662 | ||
663 | /* | |
664 | * Add a mirror/replacing vdev above an existing vdev. | |
665 | */ | |
666 | vdev_t * | |
667 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
668 | { | |
669 | spa_t *spa = cvd->vdev_spa; | |
670 | vdev_t *pvd = cvd->vdev_parent; | |
671 | vdev_t *mvd; | |
672 | ||
b128c09f | 673 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
674 | |
675 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
676 | ||
677 | mvd->vdev_asize = cvd->vdev_asize; | |
678 | mvd->vdev_ashift = cvd->vdev_ashift; | |
679 | mvd->vdev_state = cvd->vdev_state; | |
680 | ||
681 | vdev_remove_child(pvd, cvd); | |
682 | vdev_add_child(pvd, mvd); | |
683 | cvd->vdev_id = mvd->vdev_children; | |
684 | vdev_add_child(mvd, cvd); | |
685 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
686 | ||
687 | if (mvd == mvd->vdev_top) | |
688 | vdev_top_transfer(cvd, mvd); | |
689 | ||
690 | return (mvd); | |
691 | } | |
692 | ||
693 | /* | |
694 | * Remove a 1-way mirror/replacing vdev from the tree. | |
695 | */ | |
696 | void | |
697 | vdev_remove_parent(vdev_t *cvd) | |
698 | { | |
699 | vdev_t *mvd = cvd->vdev_parent; | |
700 | vdev_t *pvd = mvd->vdev_parent; | |
701 | ||
b128c09f | 702 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
703 | |
704 | ASSERT(mvd->vdev_children == 1); | |
705 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
706 | mvd->vdev_ops == &vdev_replacing_ops || | |
707 | mvd->vdev_ops == &vdev_spare_ops); | |
708 | cvd->vdev_ashift = mvd->vdev_ashift; | |
709 | ||
710 | vdev_remove_child(mvd, cvd); | |
711 | vdev_remove_child(pvd, mvd); | |
34dc7c2f | 712 | /* |
b128c09f BB |
713 | * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. |
714 | * Otherwise, we could have detached an offline device, and when we | |
715 | * go to import the pool we'll think we have two top-level vdevs, | |
716 | * instead of a different version of the same top-level vdev. | |
34dc7c2f | 717 | */ |
b128c09f BB |
718 | if (mvd->vdev_top == mvd) |
719 | cvd->vdev_guid = cvd->vdev_guid_sum = mvd->vdev_guid; | |
720 | cvd->vdev_id = mvd->vdev_id; | |
721 | vdev_add_child(pvd, cvd); | |
34dc7c2f BB |
722 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); |
723 | ||
724 | if (cvd == cvd->vdev_top) | |
725 | vdev_top_transfer(mvd, cvd); | |
726 | ||
727 | ASSERT(mvd->vdev_children == 0); | |
728 | vdev_free(mvd); | |
729 | } | |
730 | ||
731 | int | |
732 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
733 | { | |
734 | spa_t *spa = vd->vdev_spa; | |
735 | objset_t *mos = spa->spa_meta_objset; | |
736 | metaslab_class_t *mc; | |
737 | uint64_t m; | |
738 | uint64_t oldc = vd->vdev_ms_count; | |
739 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
740 | metaslab_t **mspp; | |
741 | int error; | |
742 | ||
743 | if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ | |
744 | return (0); | |
745 | ||
34dc7c2f BB |
746 | ASSERT(oldc <= newc); |
747 | ||
748 | if (vd->vdev_islog) | |
749 | mc = spa->spa_log_class; | |
750 | else | |
751 | mc = spa->spa_normal_class; | |
752 | ||
753 | if (vd->vdev_mg == NULL) | |
754 | vd->vdev_mg = metaslab_group_create(mc, vd); | |
755 | ||
756 | mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); | |
757 | ||
758 | if (oldc != 0) { | |
759 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
760 | kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); | |
761 | } | |
762 | ||
763 | vd->vdev_ms = mspp; | |
764 | vd->vdev_ms_count = newc; | |
765 | ||
766 | for (m = oldc; m < newc; m++) { | |
767 | space_map_obj_t smo = { 0, 0, 0 }; | |
768 | if (txg == 0) { | |
769 | uint64_t object = 0; | |
770 | error = dmu_read(mos, vd->vdev_ms_array, | |
771 | m * sizeof (uint64_t), sizeof (uint64_t), &object); | |
772 | if (error) | |
773 | return (error); | |
774 | if (object != 0) { | |
775 | dmu_buf_t *db; | |
776 | error = dmu_bonus_hold(mos, object, FTAG, &db); | |
777 | if (error) | |
778 | return (error); | |
779 | ASSERT3U(db->db_size, >=, sizeof (smo)); | |
780 | bcopy(db->db_data, &smo, sizeof (smo)); | |
781 | ASSERT3U(smo.smo_object, ==, object); | |
782 | dmu_buf_rele(db, FTAG); | |
783 | } | |
784 | } | |
785 | vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, | |
786 | m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); | |
787 | } | |
788 | ||
789 | return (0); | |
790 | } | |
791 | ||
792 | void | |
793 | vdev_metaslab_fini(vdev_t *vd) | |
794 | { | |
795 | uint64_t m; | |
796 | uint64_t count = vd->vdev_ms_count; | |
797 | ||
798 | if (vd->vdev_ms != NULL) { | |
799 | for (m = 0; m < count; m++) | |
800 | if (vd->vdev_ms[m] != NULL) | |
801 | metaslab_fini(vd->vdev_ms[m]); | |
802 | kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); | |
803 | vd->vdev_ms = NULL; | |
804 | } | |
805 | } | |
806 | ||
b128c09f BB |
807 | typedef struct vdev_probe_stats { |
808 | boolean_t vps_readable; | |
809 | boolean_t vps_writeable; | |
810 | int vps_flags; | |
811 | zio_t *vps_root; | |
812 | vdev_t *vps_vd; | |
813 | } vdev_probe_stats_t; | |
814 | ||
815 | static void | |
816 | vdev_probe_done(zio_t *zio) | |
34dc7c2f | 817 | { |
b128c09f BB |
818 | vdev_probe_stats_t *vps = zio->io_private; |
819 | vdev_t *vd = vps->vps_vd; | |
820 | ||
821 | if (zio->io_type == ZIO_TYPE_READ) { | |
822 | ASSERT(zio->io_vd == vd); | |
823 | if (zio->io_error == 0) | |
824 | vps->vps_readable = 1; | |
825 | if (zio->io_error == 0 && (spa_mode & FWRITE)) { | |
826 | zio_nowait(zio_write_phys(vps->vps_root, vd, | |
827 | zio->io_offset, zio->io_size, zio->io_data, | |
828 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
829 | ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); | |
830 | } else { | |
831 | zio_buf_free(zio->io_data, zio->io_size); | |
832 | } | |
833 | } else if (zio->io_type == ZIO_TYPE_WRITE) { | |
834 | ASSERT(zio->io_vd == vd); | |
835 | if (zio->io_error == 0) | |
836 | vps->vps_writeable = 1; | |
837 | zio_buf_free(zio->io_data, zio->io_size); | |
838 | } else if (zio->io_type == ZIO_TYPE_NULL) { | |
839 | ASSERT(zio->io_vd == NULL); | |
840 | ASSERT(zio == vps->vps_root); | |
841 | ||
842 | vd->vdev_cant_read |= !vps->vps_readable; | |
843 | vd->vdev_cant_write |= !vps->vps_writeable; | |
844 | ||
845 | if (vdev_readable(vd) && | |
846 | (vdev_writeable(vd) || !(spa_mode & FWRITE))) { | |
847 | zio->io_error = 0; | |
848 | } else { | |
849 | ASSERT(zio->io_error != 0); | |
850 | zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, | |
851 | zio->io_spa, vd, NULL, 0, 0); | |
852 | zio->io_error = ENXIO; | |
853 | } | |
854 | kmem_free(vps, sizeof (*vps)); | |
855 | } | |
856 | } | |
34dc7c2f | 857 | |
b128c09f BB |
858 | /* |
859 | * Determine whether this device is accessible by reading and writing | |
860 | * to several known locations: the pad regions of each vdev label | |
861 | * but the first (which we leave alone in case it contains a VTOC). | |
862 | */ | |
863 | zio_t * | |
864 | vdev_probe(vdev_t *vd, zio_t *pio) | |
865 | { | |
866 | spa_t *spa = vd->vdev_spa; | |
867 | vdev_probe_stats_t *vps; | |
868 | zio_t *zio; | |
34dc7c2f | 869 | |
b128c09f BB |
870 | vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); |
871 | ||
872 | vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | | |
873 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | ZIO_FLAG_DONT_RETRY; | |
874 | ||
875 | if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { | |
876 | /* | |
877 | * vdev_cant_read and vdev_cant_write can only transition | |
878 | * from TRUE to FALSE when we have the SCL_ZIO lock as writer; | |
879 | * otherwise they can only transition from FALSE to TRUE. | |
880 | * This ensures that any zio looking at these values can | |
881 | * assume that failures persist for the life of the I/O. | |
882 | * That's important because when a device has intermittent | |
883 | * connectivity problems, we want to ensure that they're | |
884 | * ascribed to the device (ENXIO) and not the zio (EIO). | |
885 | * | |
886 | * Since we hold SCL_ZIO as writer here, clear both values | |
887 | * so the probe can reevaluate from first principles. | |
888 | */ | |
889 | vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; | |
890 | vd->vdev_cant_read = B_FALSE; | |
891 | vd->vdev_cant_write = B_FALSE; | |
892 | } | |
893 | ||
894 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
895 | ||
896 | zio = zio_null(pio, spa, vdev_probe_done, vps, vps->vps_flags); | |
897 | ||
898 | vps->vps_root = zio; | |
899 | vps->vps_vd = vd; | |
900 | ||
901 | for (int l = 1; l < VDEV_LABELS; l++) { | |
902 | zio_nowait(zio_read_phys(zio, vd, | |
903 | vdev_label_offset(vd->vdev_psize, l, | |
904 | offsetof(vdev_label_t, vl_pad)), | |
905 | VDEV_SKIP_SIZE, zio_buf_alloc(VDEV_SKIP_SIZE), | |
906 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
907 | ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); | |
908 | } | |
909 | ||
910 | return (zio); | |
34dc7c2f BB |
911 | } |
912 | ||
913 | /* | |
914 | * Prepare a virtual device for access. | |
915 | */ | |
916 | int | |
917 | vdev_open(vdev_t *vd) | |
918 | { | |
919 | int error; | |
920 | int c; | |
921 | uint64_t osize = 0; | |
922 | uint64_t asize, psize; | |
923 | uint64_t ashift = 0; | |
924 | ||
925 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || | |
926 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
927 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
928 | ||
34dc7c2f BB |
929 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; |
930 | ||
931 | if (!vd->vdev_removed && vd->vdev_faulted) { | |
932 | ASSERT(vd->vdev_children == 0); | |
933 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
934 | VDEV_AUX_ERR_EXCEEDED); | |
935 | return (ENXIO); | |
936 | } else if (vd->vdev_offline) { | |
937 | ASSERT(vd->vdev_children == 0); | |
938 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
939 | return (ENXIO); | |
940 | } | |
941 | ||
942 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); | |
943 | ||
944 | if (zio_injection_enabled && error == 0) | |
945 | error = zio_handle_device_injection(vd, ENXIO); | |
946 | ||
947 | if (error) { | |
948 | if (vd->vdev_removed && | |
949 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
950 | vd->vdev_removed = B_FALSE; | |
951 | ||
952 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
953 | vd->vdev_stat.vs_aux); | |
954 | return (error); | |
955 | } | |
956 | ||
957 | vd->vdev_removed = B_FALSE; | |
958 | ||
959 | if (vd->vdev_degraded) { | |
960 | ASSERT(vd->vdev_children == 0); | |
961 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
962 | VDEV_AUX_ERR_EXCEEDED); | |
963 | } else { | |
964 | vd->vdev_state = VDEV_STATE_HEALTHY; | |
965 | } | |
966 | ||
967 | for (c = 0; c < vd->vdev_children; c++) | |
968 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { | |
969 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
970 | VDEV_AUX_NONE); | |
971 | break; | |
972 | } | |
973 | ||
974 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
975 | ||
976 | if (vd->vdev_children == 0) { | |
977 | if (osize < SPA_MINDEVSIZE) { | |
978 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
979 | VDEV_AUX_TOO_SMALL); | |
980 | return (EOVERFLOW); | |
981 | } | |
982 | psize = osize; | |
983 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
984 | } else { | |
985 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
986 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
987 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
988 | VDEV_AUX_TOO_SMALL); | |
989 | return (EOVERFLOW); | |
990 | } | |
991 | psize = 0; | |
992 | asize = osize; | |
993 | } | |
994 | ||
995 | vd->vdev_psize = psize; | |
996 | ||
997 | if (vd->vdev_asize == 0) { | |
998 | /* | |
999 | * This is the first-ever open, so use the computed values. | |
1000 | * For testing purposes, a higher ashift can be requested. | |
1001 | */ | |
1002 | vd->vdev_asize = asize; | |
1003 | vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); | |
1004 | } else { | |
1005 | /* | |
1006 | * Make sure the alignment requirement hasn't increased. | |
1007 | */ | |
1008 | if (ashift > vd->vdev_top->vdev_ashift) { | |
1009 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1010 | VDEV_AUX_BAD_LABEL); | |
1011 | return (EINVAL); | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Make sure the device hasn't shrunk. | |
1016 | */ | |
1017 | if (asize < vd->vdev_asize) { | |
1018 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1019 | VDEV_AUX_BAD_LABEL); | |
1020 | return (EINVAL); | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * If all children are healthy and the asize has increased, | |
1025 | * then we've experienced dynamic LUN growth. | |
1026 | */ | |
1027 | if (vd->vdev_state == VDEV_STATE_HEALTHY && | |
1028 | asize > vd->vdev_asize) { | |
1029 | vd->vdev_asize = asize; | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Ensure we can issue some IO before declaring the | |
1035 | * vdev open for business. | |
1036 | */ | |
b128c09f BB |
1037 | if (vd->vdev_ops->vdev_op_leaf && |
1038 | (error = zio_wait(vdev_probe(vd, NULL))) != 0) { | |
34dc7c2f | 1039 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, |
b128c09f | 1040 | VDEV_AUX_IO_FAILURE); |
34dc7c2f BB |
1041 | return (error); |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * If this is a top-level vdev, compute the raidz-deflation | |
1046 | * ratio. Note, we hard-code in 128k (1<<17) because it is the | |
1047 | * current "typical" blocksize. Even if SPA_MAXBLOCKSIZE | |
1048 | * changes, this algorithm must never change, or we will | |
1049 | * inconsistently account for existing bp's. | |
1050 | */ | |
1051 | if (vd->vdev_top == vd) { | |
1052 | vd->vdev_deflate_ratio = (1<<17) / | |
1053 | (vdev_psize_to_asize(vd, 1<<17) >> SPA_MINBLOCKSHIFT); | |
1054 | } | |
1055 | ||
1056 | /* | |
b128c09f BB |
1057 | * If a leaf vdev has a DTL, and seems healthy, then kick off a |
1058 | * resilver. But don't do this if we are doing a reopen for a | |
1059 | * scrub, since this would just restart the scrub we are already | |
1060 | * doing. | |
34dc7c2f | 1061 | */ |
b128c09f BB |
1062 | if (vd->vdev_children == 0 && !vd->vdev_spa->spa_scrub_reopen) { |
1063 | mutex_enter(&vd->vdev_dtl_lock); | |
1064 | if (vd->vdev_dtl_map.sm_space != 0 && vdev_writeable(vd)) | |
1065 | spa_async_request(vd->vdev_spa, SPA_ASYNC_RESILVER); | |
1066 | mutex_exit(&vd->vdev_dtl_lock); | |
1067 | } | |
34dc7c2f BB |
1068 | |
1069 | return (0); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Called once the vdevs are all opened, this routine validates the label | |
1074 | * contents. This needs to be done before vdev_load() so that we don't | |
1075 | * inadvertently do repair I/Os to the wrong device. | |
1076 | * | |
1077 | * This function will only return failure if one of the vdevs indicates that it | |
1078 | * has since been destroyed or exported. This is only possible if | |
1079 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
1080 | * will be updated but the function will return 0. | |
1081 | */ | |
1082 | int | |
1083 | vdev_validate(vdev_t *vd) | |
1084 | { | |
1085 | spa_t *spa = vd->vdev_spa; | |
1086 | int c; | |
1087 | nvlist_t *label; | |
b128c09f | 1088 | uint64_t guid, top_guid; |
34dc7c2f BB |
1089 | uint64_t state; |
1090 | ||
1091 | for (c = 0; c < vd->vdev_children; c++) | |
1092 | if (vdev_validate(vd->vdev_child[c]) != 0) | |
1093 | return (EBADF); | |
1094 | ||
1095 | /* | |
1096 | * If the device has already failed, or was marked offline, don't do | |
1097 | * any further validation. Otherwise, label I/O will fail and we will | |
1098 | * overwrite the previous state. | |
1099 | */ | |
b128c09f | 1100 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { |
34dc7c2f BB |
1101 | |
1102 | if ((label = vdev_label_read_config(vd)) == NULL) { | |
1103 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1104 | VDEV_AUX_BAD_LABEL); | |
1105 | return (0); | |
1106 | } | |
1107 | ||
1108 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, | |
1109 | &guid) != 0 || guid != spa_guid(spa)) { | |
1110 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1111 | VDEV_AUX_CORRUPT_DATA); | |
1112 | nvlist_free(label); | |
1113 | return (0); | |
1114 | } | |
1115 | ||
b128c09f BB |
1116 | /* |
1117 | * If this vdev just became a top-level vdev because its | |
1118 | * sibling was detached, it will have adopted the parent's | |
1119 | * vdev guid -- but the label may or may not be on disk yet. | |
1120 | * Fortunately, either version of the label will have the | |
1121 | * same top guid, so if we're a top-level vdev, we can | |
1122 | * safely compare to that instead. | |
1123 | */ | |
34dc7c2f | 1124 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, |
b128c09f BB |
1125 | &guid) != 0 || |
1126 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, | |
1127 | &top_guid) != 0 || | |
1128 | (vd->vdev_guid != guid && | |
1129 | (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { | |
34dc7c2f BB |
1130 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
1131 | VDEV_AUX_CORRUPT_DATA); | |
1132 | nvlist_free(label); | |
1133 | return (0); | |
1134 | } | |
1135 | ||
1136 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1137 | &state) != 0) { | |
1138 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1139 | VDEV_AUX_CORRUPT_DATA); | |
1140 | nvlist_free(label); | |
1141 | return (0); | |
1142 | } | |
1143 | ||
1144 | nvlist_free(label); | |
1145 | ||
1146 | if (spa->spa_load_state == SPA_LOAD_OPEN && | |
1147 | state != POOL_STATE_ACTIVE) | |
1148 | return (EBADF); | |
34dc7c2f | 1149 | |
b128c09f BB |
1150 | /* |
1151 | * If we were able to open and validate a vdev that was | |
1152 | * previously marked permanently unavailable, clear that state | |
1153 | * now. | |
1154 | */ | |
1155 | if (vd->vdev_not_present) | |
1156 | vd->vdev_not_present = 0; | |
1157 | } | |
34dc7c2f BB |
1158 | |
1159 | return (0); | |
1160 | } | |
1161 | ||
1162 | /* | |
1163 | * Close a virtual device. | |
1164 | */ | |
1165 | void | |
1166 | vdev_close(vdev_t *vd) | |
1167 | { | |
1168 | vd->vdev_ops->vdev_op_close(vd); | |
1169 | ||
1170 | vdev_cache_purge(vd); | |
1171 | ||
1172 | /* | |
1173 | * We record the previous state before we close it, so that if we are | |
1174 | * doing a reopen(), we don't generate FMA ereports if we notice that | |
1175 | * it's still faulted. | |
1176 | */ | |
1177 | vd->vdev_prevstate = vd->vdev_state; | |
1178 | ||
1179 | if (vd->vdev_offline) | |
1180 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
1181 | else | |
1182 | vd->vdev_state = VDEV_STATE_CLOSED; | |
1183 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1184 | } | |
1185 | ||
1186 | void | |
1187 | vdev_reopen(vdev_t *vd) | |
1188 | { | |
1189 | spa_t *spa = vd->vdev_spa; | |
1190 | ||
b128c09f | 1191 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
34dc7c2f BB |
1192 | |
1193 | vdev_close(vd); | |
1194 | (void) vdev_open(vd); | |
1195 | ||
1196 | /* | |
1197 | * Call vdev_validate() here to make sure we have the same device. | |
1198 | * Otherwise, a device with an invalid label could be successfully | |
1199 | * opened in response to vdev_reopen(). | |
1200 | */ | |
b128c09f BB |
1201 | if (vd->vdev_aux) { |
1202 | (void) vdev_validate_aux(vd); | |
1203 | if (vdev_readable(vd) && vdev_writeable(vd) && | |
1204 | !l2arc_vdev_present(vd)) { | |
1205 | uint64_t size = vdev_get_rsize(vd); | |
1206 | l2arc_add_vdev(spa, vd, | |
1207 | VDEV_LABEL_START_SIZE, | |
1208 | size - VDEV_LABEL_START_SIZE); | |
1209 | } | |
1210 | } else { | |
1211 | (void) vdev_validate(vd); | |
1212 | } | |
34dc7c2f BB |
1213 | |
1214 | /* | |
1215 | * Reassess parent vdev's health. | |
1216 | */ | |
1217 | vdev_propagate_state(vd); | |
1218 | } | |
1219 | ||
1220 | int | |
1221 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
1222 | { | |
1223 | int error; | |
1224 | ||
1225 | /* | |
1226 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
1227 | * For a create, however, we want to fail the request if | |
1228 | * there are any components we can't open. | |
1229 | */ | |
1230 | error = vdev_open(vd); | |
1231 | ||
1232 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
1233 | vdev_close(vd); | |
1234 | return (error ? error : ENXIO); | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * Recursively initialize all labels. | |
1239 | */ | |
1240 | if ((error = vdev_label_init(vd, txg, isreplacing ? | |
1241 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { | |
1242 | vdev_close(vd); | |
1243 | return (error); | |
1244 | } | |
1245 | ||
1246 | return (0); | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * The is the latter half of vdev_create(). It is distinct because it | |
1251 | * involves initiating transactions in order to do metaslab creation. | |
1252 | * For creation, we want to try to create all vdevs at once and then undo it | |
1253 | * if anything fails; this is much harder if we have pending transactions. | |
1254 | */ | |
1255 | void | |
1256 | vdev_init(vdev_t *vd, uint64_t txg) | |
1257 | { | |
1258 | /* | |
1259 | * Aim for roughly 200 metaslabs per vdev. | |
1260 | */ | |
1261 | vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); | |
1262 | vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); | |
1263 | ||
1264 | /* | |
1265 | * Initialize the vdev's metaslabs. This can't fail because | |
1266 | * there's nothing to read when creating all new metaslabs. | |
1267 | */ | |
1268 | VERIFY(vdev_metaslab_init(vd, txg) == 0); | |
1269 | } | |
1270 | ||
1271 | void | |
1272 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
1273 | { | |
1274 | ASSERT(vd == vd->vdev_top); | |
1275 | ASSERT(ISP2(flags)); | |
1276 | ||
1277 | if (flags & VDD_METASLAB) | |
1278 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
1279 | ||
1280 | if (flags & VDD_DTL) | |
1281 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
1282 | ||
1283 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
1284 | } | |
1285 | ||
1286 | void | |
1287 | vdev_dtl_dirty(space_map_t *sm, uint64_t txg, uint64_t size) | |
1288 | { | |
1289 | mutex_enter(sm->sm_lock); | |
1290 | if (!space_map_contains(sm, txg, size)) | |
1291 | space_map_add(sm, txg, size); | |
1292 | mutex_exit(sm->sm_lock); | |
1293 | } | |
1294 | ||
1295 | int | |
1296 | vdev_dtl_contains(space_map_t *sm, uint64_t txg, uint64_t size) | |
1297 | { | |
1298 | int dirty; | |
1299 | ||
1300 | /* | |
1301 | * Quick test without the lock -- covers the common case that | |
1302 | * there are no dirty time segments. | |
1303 | */ | |
1304 | if (sm->sm_space == 0) | |
1305 | return (0); | |
1306 | ||
1307 | mutex_enter(sm->sm_lock); | |
1308 | dirty = space_map_contains(sm, txg, size); | |
1309 | mutex_exit(sm->sm_lock); | |
1310 | ||
1311 | return (dirty); | |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * Reassess DTLs after a config change or scrub completion. | |
1316 | */ | |
1317 | void | |
1318 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
1319 | { | |
1320 | spa_t *spa = vd->vdev_spa; | |
1321 | int c; | |
1322 | ||
b128c09f | 1323 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); |
34dc7c2f BB |
1324 | |
1325 | if (vd->vdev_children == 0) { | |
1326 | mutex_enter(&vd->vdev_dtl_lock); | |
b128c09f BB |
1327 | if (scrub_txg != 0 && |
1328 | (spa->spa_scrub_started || spa->spa_scrub_errors == 0)) { | |
1329 | /* XXX should check scrub_done? */ | |
1330 | /* | |
1331 | * We completed a scrub up to scrub_txg. If we | |
1332 | * did it without rebooting, then the scrub dtl | |
1333 | * will be valid, so excise the old region and | |
1334 | * fold in the scrub dtl. Otherwise, leave the | |
1335 | * dtl as-is if there was an error. | |
1336 | */ | |
34dc7c2f BB |
1337 | space_map_excise(&vd->vdev_dtl_map, 0, scrub_txg); |
1338 | space_map_union(&vd->vdev_dtl_map, &vd->vdev_dtl_scrub); | |
1339 | } | |
1340 | if (scrub_done) | |
1341 | space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); | |
1342 | mutex_exit(&vd->vdev_dtl_lock); | |
b128c09f | 1343 | |
34dc7c2f BB |
1344 | if (txg != 0) |
1345 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
1346 | return; | |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * Make sure the DTLs are always correct under the scrub lock. | |
1351 | */ | |
1352 | if (vd == spa->spa_root_vdev) | |
1353 | mutex_enter(&spa->spa_scrub_lock); | |
1354 | ||
1355 | mutex_enter(&vd->vdev_dtl_lock); | |
1356 | space_map_vacate(&vd->vdev_dtl_map, NULL, NULL); | |
1357 | space_map_vacate(&vd->vdev_dtl_scrub, NULL, NULL); | |
1358 | mutex_exit(&vd->vdev_dtl_lock); | |
1359 | ||
1360 | for (c = 0; c < vd->vdev_children; c++) { | |
1361 | vdev_t *cvd = vd->vdev_child[c]; | |
1362 | vdev_dtl_reassess(cvd, txg, scrub_txg, scrub_done); | |
1363 | mutex_enter(&vd->vdev_dtl_lock); | |
1364 | space_map_union(&vd->vdev_dtl_map, &cvd->vdev_dtl_map); | |
1365 | space_map_union(&vd->vdev_dtl_scrub, &cvd->vdev_dtl_scrub); | |
1366 | mutex_exit(&vd->vdev_dtl_lock); | |
1367 | } | |
1368 | ||
1369 | if (vd == spa->spa_root_vdev) | |
1370 | mutex_exit(&spa->spa_scrub_lock); | |
1371 | } | |
1372 | ||
1373 | static int | |
1374 | vdev_dtl_load(vdev_t *vd) | |
1375 | { | |
1376 | spa_t *spa = vd->vdev_spa; | |
1377 | space_map_obj_t *smo = &vd->vdev_dtl; | |
1378 | objset_t *mos = spa->spa_meta_objset; | |
1379 | dmu_buf_t *db; | |
1380 | int error; | |
1381 | ||
1382 | ASSERT(vd->vdev_children == 0); | |
1383 | ||
1384 | if (smo->smo_object == 0) | |
1385 | return (0); | |
1386 | ||
1387 | if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) | |
1388 | return (error); | |
1389 | ||
1390 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1391 | bcopy(db->db_data, smo, sizeof (*smo)); | |
1392 | dmu_buf_rele(db, FTAG); | |
1393 | ||
1394 | mutex_enter(&vd->vdev_dtl_lock); | |
1395 | error = space_map_load(&vd->vdev_dtl_map, NULL, SM_ALLOC, smo, mos); | |
1396 | mutex_exit(&vd->vdev_dtl_lock); | |
1397 | ||
1398 | return (error); | |
1399 | } | |
1400 | ||
1401 | void | |
1402 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
1403 | { | |
1404 | spa_t *spa = vd->vdev_spa; | |
1405 | space_map_obj_t *smo = &vd->vdev_dtl; | |
1406 | space_map_t *sm = &vd->vdev_dtl_map; | |
1407 | objset_t *mos = spa->spa_meta_objset; | |
1408 | space_map_t smsync; | |
1409 | kmutex_t smlock; | |
1410 | dmu_buf_t *db; | |
1411 | dmu_tx_t *tx; | |
1412 | ||
34dc7c2f BB |
1413 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); |
1414 | ||
1415 | if (vd->vdev_detached) { | |
1416 | if (smo->smo_object != 0) { | |
1417 | int err = dmu_object_free(mos, smo->smo_object, tx); | |
1418 | ASSERT3U(err, ==, 0); | |
1419 | smo->smo_object = 0; | |
1420 | } | |
1421 | dmu_tx_commit(tx); | |
34dc7c2f BB |
1422 | return; |
1423 | } | |
1424 | ||
1425 | if (smo->smo_object == 0) { | |
1426 | ASSERT(smo->smo_objsize == 0); | |
1427 | ASSERT(smo->smo_alloc == 0); | |
1428 | smo->smo_object = dmu_object_alloc(mos, | |
1429 | DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, | |
1430 | DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); | |
1431 | ASSERT(smo->smo_object != 0); | |
1432 | vdev_config_dirty(vd->vdev_top); | |
1433 | } | |
1434 | ||
1435 | mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); | |
1436 | ||
1437 | space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, | |
1438 | &smlock); | |
1439 | ||
1440 | mutex_enter(&smlock); | |
1441 | ||
1442 | mutex_enter(&vd->vdev_dtl_lock); | |
1443 | space_map_walk(sm, space_map_add, &smsync); | |
1444 | mutex_exit(&vd->vdev_dtl_lock); | |
1445 | ||
1446 | space_map_truncate(smo, mos, tx); | |
1447 | space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); | |
1448 | ||
1449 | space_map_destroy(&smsync); | |
1450 | ||
1451 | mutex_exit(&smlock); | |
1452 | mutex_destroy(&smlock); | |
1453 | ||
1454 | VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); | |
1455 | dmu_buf_will_dirty(db, tx); | |
1456 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1457 | bcopy(smo, db->db_data, sizeof (*smo)); | |
1458 | dmu_buf_rele(db, FTAG); | |
1459 | ||
1460 | dmu_tx_commit(tx); | |
1461 | } | |
1462 | ||
b128c09f BB |
1463 | /* |
1464 | * Determine if resilver is needed, and if so the txg range. | |
1465 | */ | |
1466 | boolean_t | |
1467 | vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) | |
1468 | { | |
1469 | boolean_t needed = B_FALSE; | |
1470 | uint64_t thismin = UINT64_MAX; | |
1471 | uint64_t thismax = 0; | |
1472 | ||
1473 | if (vd->vdev_children == 0) { | |
1474 | mutex_enter(&vd->vdev_dtl_lock); | |
1475 | if (vd->vdev_dtl_map.sm_space != 0 && vdev_writeable(vd)) { | |
1476 | space_seg_t *ss; | |
1477 | ||
1478 | ss = avl_first(&vd->vdev_dtl_map.sm_root); | |
1479 | thismin = ss->ss_start - 1; | |
1480 | ss = avl_last(&vd->vdev_dtl_map.sm_root); | |
1481 | thismax = ss->ss_end; | |
1482 | needed = B_TRUE; | |
1483 | } | |
1484 | mutex_exit(&vd->vdev_dtl_lock); | |
1485 | } else { | |
1486 | int c; | |
1487 | for (c = 0; c < vd->vdev_children; c++) { | |
1488 | vdev_t *cvd = vd->vdev_child[c]; | |
1489 | uint64_t cmin, cmax; | |
1490 | ||
1491 | if (vdev_resilver_needed(cvd, &cmin, &cmax)) { | |
1492 | thismin = MIN(thismin, cmin); | |
1493 | thismax = MAX(thismax, cmax); | |
1494 | needed = B_TRUE; | |
1495 | } | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | if (needed && minp) { | |
1500 | *minp = thismin; | |
1501 | *maxp = thismax; | |
1502 | } | |
1503 | return (needed); | |
1504 | } | |
1505 | ||
34dc7c2f BB |
1506 | void |
1507 | vdev_load(vdev_t *vd) | |
1508 | { | |
1509 | int c; | |
1510 | ||
1511 | /* | |
1512 | * Recursively load all children. | |
1513 | */ | |
1514 | for (c = 0; c < vd->vdev_children; c++) | |
1515 | vdev_load(vd->vdev_child[c]); | |
1516 | ||
1517 | /* | |
1518 | * If this is a top-level vdev, initialize its metaslabs. | |
1519 | */ | |
1520 | if (vd == vd->vdev_top && | |
1521 | (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || | |
1522 | vdev_metaslab_init(vd, 0) != 0)) | |
1523 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1524 | VDEV_AUX_CORRUPT_DATA); | |
1525 | ||
1526 | /* | |
1527 | * If this is a leaf vdev, load its DTL. | |
1528 | */ | |
1529 | if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) | |
1530 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1531 | VDEV_AUX_CORRUPT_DATA); | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * The special vdev case is used for hot spares and l2cache devices. Its | |
1536 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
1537 | * we make sure that we can open the underlying device, then try to read the | |
1538 | * label, and make sure that the label is sane and that it hasn't been | |
1539 | * repurposed to another pool. | |
1540 | */ | |
1541 | int | |
1542 | vdev_validate_aux(vdev_t *vd) | |
1543 | { | |
1544 | nvlist_t *label; | |
1545 | uint64_t guid, version; | |
1546 | uint64_t state; | |
1547 | ||
b128c09f BB |
1548 | if (!vdev_readable(vd)) |
1549 | return (0); | |
1550 | ||
34dc7c2f BB |
1551 | if ((label = vdev_label_read_config(vd)) == NULL) { |
1552 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1553 | VDEV_AUX_CORRUPT_DATA); | |
1554 | return (-1); | |
1555 | } | |
1556 | ||
1557 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
1558 | version > SPA_VERSION || | |
1559 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || | |
1560 | guid != vd->vdev_guid || | |
1561 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
1562 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1563 | VDEV_AUX_CORRUPT_DATA); | |
1564 | nvlist_free(label); | |
1565 | return (-1); | |
1566 | } | |
1567 | ||
1568 | /* | |
1569 | * We don't actually check the pool state here. If it's in fact in | |
1570 | * use by another pool, we update this fact on the fly when requested. | |
1571 | */ | |
1572 | nvlist_free(label); | |
1573 | return (0); | |
1574 | } | |
1575 | ||
1576 | void | |
1577 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
1578 | { | |
1579 | metaslab_t *msp; | |
1580 | ||
34dc7c2f BB |
1581 | while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) |
1582 | metaslab_sync_done(msp, txg); | |
1583 | } | |
1584 | ||
1585 | void | |
1586 | vdev_sync(vdev_t *vd, uint64_t txg) | |
1587 | { | |
1588 | spa_t *spa = vd->vdev_spa; | |
1589 | vdev_t *lvd; | |
1590 | metaslab_t *msp; | |
1591 | dmu_tx_t *tx; | |
1592 | ||
34dc7c2f BB |
1593 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { |
1594 | ASSERT(vd == vd->vdev_top); | |
1595 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1596 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
1597 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
1598 | ASSERT(vd->vdev_ms_array != 0); | |
1599 | vdev_config_dirty(vd); | |
1600 | dmu_tx_commit(tx); | |
1601 | } | |
1602 | ||
1603 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { | |
1604 | metaslab_sync(msp, txg); | |
1605 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
1606 | } | |
1607 | ||
1608 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
1609 | vdev_dtl_sync(lvd, txg); | |
1610 | ||
1611 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); | |
1612 | } | |
1613 | ||
1614 | uint64_t | |
1615 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
1616 | { | |
1617 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
1618 | } | |
1619 | ||
34dc7c2f BB |
1620 | /* |
1621 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
1622 | * not be opened, and no I/O is attempted. | |
1623 | */ | |
1624 | int | |
1625 | vdev_fault(spa_t *spa, uint64_t guid) | |
1626 | { | |
b128c09f | 1627 | vdev_t *vd; |
34dc7c2f | 1628 | |
b128c09f | 1629 | spa_vdev_state_enter(spa); |
34dc7c2f | 1630 | |
b128c09f BB |
1631 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1632 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 1633 | |
34dc7c2f | 1634 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 1635 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1636 | |
1637 | /* | |
1638 | * Faulted state takes precedence over degraded. | |
1639 | */ | |
1640 | vd->vdev_faulted = 1ULL; | |
1641 | vd->vdev_degraded = 0ULL; | |
b128c09f | 1642 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, VDEV_AUX_ERR_EXCEEDED); |
34dc7c2f BB |
1643 | |
1644 | /* | |
b128c09f | 1645 | * If marking the vdev as faulted cause the top-level vdev to become |
34dc7c2f BB |
1646 | * unavailable, then back off and simply mark the vdev as degraded |
1647 | * instead. | |
1648 | */ | |
b128c09f | 1649 | if (vdev_is_dead(vd->vdev_top) && vd->vdev_aux == NULL) { |
34dc7c2f BB |
1650 | vd->vdev_degraded = 1ULL; |
1651 | vd->vdev_faulted = 0ULL; | |
1652 | ||
1653 | /* | |
1654 | * If we reopen the device and it's not dead, only then do we | |
1655 | * mark it degraded. | |
1656 | */ | |
1657 | vdev_reopen(vd); | |
1658 | ||
1659 | if (vdev_readable(vd)) { | |
1660 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1661 | VDEV_AUX_ERR_EXCEEDED); | |
1662 | } | |
1663 | } | |
1664 | ||
b128c09f | 1665 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1666 | } |
1667 | ||
1668 | /* | |
1669 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
1670 | * user that something is wrong. The vdev continues to operate as normal as far | |
1671 | * as I/O is concerned. | |
1672 | */ | |
1673 | int | |
1674 | vdev_degrade(spa_t *spa, uint64_t guid) | |
1675 | { | |
b128c09f | 1676 | vdev_t *vd; |
34dc7c2f | 1677 | |
b128c09f | 1678 | spa_vdev_state_enter(spa); |
34dc7c2f | 1679 | |
b128c09f BB |
1680 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1681 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 1682 | |
34dc7c2f | 1683 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 1684 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1685 | |
1686 | /* | |
1687 | * If the vdev is already faulted, then don't do anything. | |
1688 | */ | |
b128c09f BB |
1689 | if (vd->vdev_faulted || vd->vdev_degraded) |
1690 | return (spa_vdev_state_exit(spa, NULL, 0)); | |
34dc7c2f BB |
1691 | |
1692 | vd->vdev_degraded = 1ULL; | |
1693 | if (!vdev_is_dead(vd)) | |
1694 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1695 | VDEV_AUX_ERR_EXCEEDED); | |
34dc7c2f | 1696 | |
b128c09f | 1697 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1698 | } |
1699 | ||
1700 | /* | |
1701 | * Online the given vdev. If 'unspare' is set, it implies two things. First, | |
1702 | * any attached spare device should be detached when the device finishes | |
1703 | * resilvering. Second, the online should be treated like a 'test' online case, | |
1704 | * so no FMA events are generated if the device fails to open. | |
1705 | */ | |
1706 | int | |
b128c09f | 1707 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) |
34dc7c2f | 1708 | { |
b128c09f | 1709 | vdev_t *vd; |
34dc7c2f | 1710 | |
b128c09f | 1711 | spa_vdev_state_enter(spa); |
34dc7c2f | 1712 | |
b128c09f BB |
1713 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1714 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
1715 | |
1716 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 1717 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1718 | |
1719 | vd->vdev_offline = B_FALSE; | |
1720 | vd->vdev_tmpoffline = B_FALSE; | |
b128c09f BB |
1721 | vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); |
1722 | vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); | |
34dc7c2f BB |
1723 | vdev_reopen(vd->vdev_top); |
1724 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; | |
1725 | ||
1726 | if (newstate) | |
1727 | *newstate = vd->vdev_state; | |
1728 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
1729 | !vdev_is_dead(vd) && vd->vdev_parent && | |
1730 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
1731 | vd->vdev_parent->vdev_child[0] == vd) | |
1732 | vd->vdev_unspare = B_TRUE; | |
1733 | ||
b128c09f | 1734 | (void) spa_vdev_state_exit(spa, vd, 0); |
34dc7c2f | 1735 | |
b128c09f | 1736 | VERIFY3U(spa_scrub(spa, POOL_SCRUB_RESILVER), ==, 0); |
34dc7c2f BB |
1737 | |
1738 | return (0); | |
1739 | } | |
1740 | ||
1741 | int | |
1742 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
1743 | { | |
b128c09f | 1744 | vdev_t *vd; |
34dc7c2f | 1745 | |
b128c09f | 1746 | spa_vdev_state_enter(spa); |
34dc7c2f | 1747 | |
b128c09f BB |
1748 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1749 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
1750 | |
1751 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 1752 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1753 | |
1754 | /* | |
1755 | * If the device isn't already offline, try to offline it. | |
1756 | */ | |
1757 | if (!vd->vdev_offline) { | |
1758 | /* | |
1759 | * If this device's top-level vdev has a non-empty DTL, | |
1760 | * don't allow the device to be offlined. | |
1761 | * | |
1762 | * XXX -- make this more precise by allowing the offline | |
1763 | * as long as the remaining devices don't have any DTL holes. | |
1764 | */ | |
1765 | if (vd->vdev_top->vdev_dtl_map.sm_space != 0) | |
b128c09f | 1766 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f BB |
1767 | |
1768 | /* | |
1769 | * Offline this device and reopen its top-level vdev. | |
1770 | * If this action results in the top-level vdev becoming | |
1771 | * unusable, undo it and fail the request. | |
1772 | */ | |
1773 | vd->vdev_offline = B_TRUE; | |
1774 | vdev_reopen(vd->vdev_top); | |
b128c09f | 1775 | if (vdev_is_dead(vd->vdev_top) && vd->vdev_aux == NULL) { |
34dc7c2f BB |
1776 | vd->vdev_offline = B_FALSE; |
1777 | vdev_reopen(vd->vdev_top); | |
b128c09f | 1778 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f BB |
1779 | } |
1780 | } | |
1781 | ||
b128c09f | 1782 | vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); |
34dc7c2f | 1783 | |
b128c09f | 1784 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1785 | } |
1786 | ||
1787 | /* | |
1788 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
1789 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
1790 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
34dc7c2f BB |
1791 | */ |
1792 | void | |
b128c09f | 1793 | vdev_clear(spa_t *spa, vdev_t *vd) |
34dc7c2f | 1794 | { |
b128c09f BB |
1795 | vdev_t *rvd = spa->spa_root_vdev; |
1796 | ||
1797 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
1798 | |
1799 | if (vd == NULL) | |
b128c09f | 1800 | vd = rvd; |
34dc7c2f BB |
1801 | |
1802 | vd->vdev_stat.vs_read_errors = 0; | |
1803 | vd->vdev_stat.vs_write_errors = 0; | |
1804 | vd->vdev_stat.vs_checksum_errors = 0; | |
34dc7c2f | 1805 | |
b128c09f BB |
1806 | for (int c = 0; c < vd->vdev_children; c++) |
1807 | vdev_clear(spa, vd->vdev_child[c]); | |
34dc7c2f BB |
1808 | |
1809 | /* | |
b128c09f BB |
1810 | * If we're in the FAULTED state or have experienced failed I/O, then |
1811 | * clear the persistent state and attempt to reopen the device. We | |
1812 | * also mark the vdev config dirty, so that the new faulted state is | |
1813 | * written out to disk. | |
34dc7c2f | 1814 | */ |
b128c09f BB |
1815 | if (vd->vdev_faulted || vd->vdev_degraded || |
1816 | !vdev_readable(vd) || !vdev_writeable(vd)) { | |
1817 | ||
34dc7c2f | 1818 | vd->vdev_faulted = vd->vdev_degraded = 0; |
b128c09f BB |
1819 | vd->vdev_cant_read = B_FALSE; |
1820 | vd->vdev_cant_write = B_FALSE; | |
1821 | ||
34dc7c2f | 1822 | vdev_reopen(vd); |
34dc7c2f | 1823 | |
b128c09f BB |
1824 | if (vd != rvd) |
1825 | vdev_state_dirty(vd->vdev_top); | |
1826 | ||
1827 | if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) | |
34dc7c2f BB |
1828 | spa_async_request(spa, SPA_ASYNC_RESILVER); |
1829 | ||
1830 | spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); | |
1831 | } | |
1832 | } | |
1833 | ||
b128c09f BB |
1834 | boolean_t |
1835 | vdev_is_dead(vdev_t *vd) | |
1836 | { | |
1837 | return (vd->vdev_state < VDEV_STATE_DEGRADED); | |
1838 | } | |
1839 | ||
1840 | boolean_t | |
34dc7c2f BB |
1841 | vdev_readable(vdev_t *vd) |
1842 | { | |
b128c09f | 1843 | return (!vdev_is_dead(vd) && !vd->vdev_cant_read); |
34dc7c2f BB |
1844 | } |
1845 | ||
b128c09f | 1846 | boolean_t |
34dc7c2f BB |
1847 | vdev_writeable(vdev_t *vd) |
1848 | { | |
b128c09f | 1849 | return (!vdev_is_dead(vd) && !vd->vdev_cant_write); |
34dc7c2f BB |
1850 | } |
1851 | ||
b128c09f BB |
1852 | boolean_t |
1853 | vdev_allocatable(vdev_t *vd) | |
34dc7c2f | 1854 | { |
b128c09f BB |
1855 | /* |
1856 | * We currently allow allocations from vdevs which maybe in the | |
1857 | * process of reopening (i.e. VDEV_STATE_CLOSED). If the device | |
1858 | * fails to reopen then we'll catch it later when we're holding | |
1859 | * the proper locks. | |
1860 | */ | |
1861 | return (!(vdev_is_dead(vd) && vd->vdev_state != VDEV_STATE_CLOSED) && | |
1862 | !vd->vdev_cant_write); | |
34dc7c2f BB |
1863 | } |
1864 | ||
b128c09f BB |
1865 | boolean_t |
1866 | vdev_accessible(vdev_t *vd, zio_t *zio) | |
34dc7c2f | 1867 | { |
b128c09f | 1868 | ASSERT(zio->io_vd == vd); |
34dc7c2f | 1869 | |
b128c09f BB |
1870 | if (vdev_is_dead(vd) || vd->vdev_remove_wanted) |
1871 | return (B_FALSE); | |
34dc7c2f | 1872 | |
b128c09f BB |
1873 | if (zio->io_type == ZIO_TYPE_READ) |
1874 | return (!vd->vdev_cant_read); | |
34dc7c2f | 1875 | |
b128c09f BB |
1876 | if (zio->io_type == ZIO_TYPE_WRITE) |
1877 | return (!vd->vdev_cant_write); | |
34dc7c2f | 1878 | |
b128c09f | 1879 | return (B_TRUE); |
34dc7c2f BB |
1880 | } |
1881 | ||
1882 | /* | |
1883 | * Get statistics for the given vdev. | |
1884 | */ | |
1885 | void | |
1886 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
1887 | { | |
1888 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
34dc7c2f BB |
1889 | |
1890 | mutex_enter(&vd->vdev_stat_lock); | |
1891 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
b128c09f | 1892 | vs->vs_scrub_errors = vd->vdev_spa->spa_scrub_errors; |
34dc7c2f BB |
1893 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; |
1894 | vs->vs_state = vd->vdev_state; | |
1895 | vs->vs_rsize = vdev_get_rsize(vd); | |
1896 | mutex_exit(&vd->vdev_stat_lock); | |
1897 | ||
1898 | /* | |
1899 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
1900 | * over all top-level vdevs (i.e. the direct children of the root). | |
1901 | */ | |
1902 | if (vd == rvd) { | |
b128c09f | 1903 | for (int c = 0; c < rvd->vdev_children; c++) { |
34dc7c2f BB |
1904 | vdev_t *cvd = rvd->vdev_child[c]; |
1905 | vdev_stat_t *cvs = &cvd->vdev_stat; | |
1906 | ||
1907 | mutex_enter(&vd->vdev_stat_lock); | |
b128c09f | 1908 | for (int t = 0; t < ZIO_TYPES; t++) { |
34dc7c2f BB |
1909 | vs->vs_ops[t] += cvs->vs_ops[t]; |
1910 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
1911 | } | |
34dc7c2f | 1912 | vs->vs_scrub_examined += cvs->vs_scrub_examined; |
34dc7c2f BB |
1913 | mutex_exit(&vd->vdev_stat_lock); |
1914 | } | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | void | |
1919 | vdev_clear_stats(vdev_t *vd) | |
1920 | { | |
1921 | mutex_enter(&vd->vdev_stat_lock); | |
1922 | vd->vdev_stat.vs_space = 0; | |
1923 | vd->vdev_stat.vs_dspace = 0; | |
1924 | vd->vdev_stat.vs_alloc = 0; | |
1925 | mutex_exit(&vd->vdev_stat_lock); | |
1926 | } | |
1927 | ||
1928 | void | |
b128c09f | 1929 | vdev_stat_update(zio_t *zio, uint64_t psize) |
34dc7c2f | 1930 | { |
b128c09f BB |
1931 | vdev_t *rvd = zio->io_spa->spa_root_vdev; |
1932 | vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; | |
34dc7c2f BB |
1933 | vdev_t *pvd; |
1934 | uint64_t txg = zio->io_txg; | |
1935 | vdev_stat_t *vs = &vd->vdev_stat; | |
1936 | zio_type_t type = zio->io_type; | |
1937 | int flags = zio->io_flags; | |
1938 | ||
b128c09f BB |
1939 | /* |
1940 | * If this i/o is a gang leader, it didn't do any actual work. | |
1941 | */ | |
1942 | if (zio->io_gang_tree) | |
1943 | return; | |
1944 | ||
34dc7c2f | 1945 | if (zio->io_error == 0) { |
b128c09f BB |
1946 | /* |
1947 | * If this is a root i/o, don't count it -- we've already | |
1948 | * counted the top-level vdevs, and vdev_get_stats() will | |
1949 | * aggregate them when asked. This reduces contention on | |
1950 | * the root vdev_stat_lock and implicitly handles blocks | |
1951 | * that compress away to holes, for which there is no i/o. | |
1952 | * (Holes never create vdev children, so all the counters | |
1953 | * remain zero, which is what we want.) | |
1954 | * | |
1955 | * Note: this only applies to successful i/o (io_error == 0) | |
1956 | * because unlike i/o counts, errors are not additive. | |
1957 | * When reading a ditto block, for example, failure of | |
1958 | * one top-level vdev does not imply a root-level error. | |
1959 | */ | |
1960 | if (vd == rvd) | |
1961 | return; | |
1962 | ||
1963 | ASSERT(vd == zio->io_vd); | |
34dc7c2f BB |
1964 | if (!(flags & ZIO_FLAG_IO_BYPASS)) { |
1965 | mutex_enter(&vd->vdev_stat_lock); | |
1966 | vs->vs_ops[type]++; | |
b128c09f | 1967 | vs->vs_bytes[type] += psize; |
34dc7c2f BB |
1968 | mutex_exit(&vd->vdev_stat_lock); |
1969 | } | |
b128c09f BB |
1970 | if (flags & ZIO_FLAG_IO_REPAIR) { |
1971 | ASSERT(zio->io_delegate_list == NULL); | |
34dc7c2f BB |
1972 | mutex_enter(&vd->vdev_stat_lock); |
1973 | if (flags & ZIO_FLAG_SCRUB_THREAD) | |
b128c09f | 1974 | vs->vs_scrub_repaired += psize; |
34dc7c2f | 1975 | else |
b128c09f | 1976 | vs->vs_self_healed += psize; |
34dc7c2f BB |
1977 | mutex_exit(&vd->vdev_stat_lock); |
1978 | } | |
1979 | return; | |
1980 | } | |
1981 | ||
1982 | if (flags & ZIO_FLAG_SPECULATIVE) | |
1983 | return; | |
1984 | ||
b128c09f BB |
1985 | mutex_enter(&vd->vdev_stat_lock); |
1986 | if (type == ZIO_TYPE_READ) { | |
1987 | if (zio->io_error == ECKSUM) | |
1988 | vs->vs_checksum_errors++; | |
1989 | else | |
1990 | vs->vs_read_errors++; | |
34dc7c2f | 1991 | } |
b128c09f BB |
1992 | if (type == ZIO_TYPE_WRITE) |
1993 | vs->vs_write_errors++; | |
1994 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f | 1995 | |
b128c09f | 1996 | if (type == ZIO_TYPE_WRITE && txg != 0 && vd->vdev_children == 0) { |
34dc7c2f BB |
1997 | if (flags & ZIO_FLAG_SCRUB_THREAD) { |
1998 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
1999 | for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) | |
2000 | vdev_dtl_dirty(&pvd->vdev_dtl_scrub, txg, 1); | |
2001 | } | |
2002 | if (!(flags & ZIO_FLAG_IO_REPAIR)) { | |
2003 | if (vdev_dtl_contains(&vd->vdev_dtl_map, txg, 1)) | |
2004 | return; | |
2005 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
2006 | for (pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) | |
2007 | vdev_dtl_dirty(&pvd->vdev_dtl_map, txg, 1); | |
2008 | } | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | void | |
2013 | vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) | |
2014 | { | |
2015 | int c; | |
2016 | vdev_stat_t *vs = &vd->vdev_stat; | |
2017 | ||
2018 | for (c = 0; c < vd->vdev_children; c++) | |
2019 | vdev_scrub_stat_update(vd->vdev_child[c], type, complete); | |
2020 | ||
2021 | mutex_enter(&vd->vdev_stat_lock); | |
2022 | ||
2023 | if (type == POOL_SCRUB_NONE) { | |
2024 | /* | |
2025 | * Update completion and end time. Leave everything else alone | |
2026 | * so we can report what happened during the previous scrub. | |
2027 | */ | |
2028 | vs->vs_scrub_complete = complete; | |
2029 | vs->vs_scrub_end = gethrestime_sec(); | |
2030 | } else { | |
2031 | vs->vs_scrub_type = type; | |
2032 | vs->vs_scrub_complete = 0; | |
2033 | vs->vs_scrub_examined = 0; | |
2034 | vs->vs_scrub_repaired = 0; | |
34dc7c2f BB |
2035 | vs->vs_scrub_start = gethrestime_sec(); |
2036 | vs->vs_scrub_end = 0; | |
2037 | } | |
2038 | ||
2039 | mutex_exit(&vd->vdev_stat_lock); | |
2040 | } | |
2041 | ||
2042 | /* | |
2043 | * Update the in-core space usage stats for this vdev and the root vdev. | |
2044 | */ | |
2045 | void | |
2046 | vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta, | |
2047 | boolean_t update_root) | |
2048 | { | |
2049 | int64_t dspace_delta = space_delta; | |
2050 | spa_t *spa = vd->vdev_spa; | |
2051 | vdev_t *rvd = spa->spa_root_vdev; | |
2052 | ||
2053 | ASSERT(vd == vd->vdev_top); | |
2054 | ||
2055 | /* | |
2056 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
2057 | * factor. We must calculate this here and not at the root vdev | |
2058 | * because the root vdev's psize-to-asize is simply the max of its | |
2059 | * childrens', thus not accurate enough for us. | |
2060 | */ | |
2061 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
2062 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * | |
2063 | vd->vdev_deflate_ratio; | |
2064 | ||
2065 | mutex_enter(&vd->vdev_stat_lock); | |
2066 | vd->vdev_stat.vs_space += space_delta; | |
2067 | vd->vdev_stat.vs_alloc += alloc_delta; | |
2068 | vd->vdev_stat.vs_dspace += dspace_delta; | |
2069 | mutex_exit(&vd->vdev_stat_lock); | |
2070 | ||
2071 | if (update_root) { | |
2072 | ASSERT(rvd == vd->vdev_parent); | |
2073 | ASSERT(vd->vdev_ms_count != 0); | |
2074 | ||
2075 | /* | |
2076 | * Don't count non-normal (e.g. intent log) space as part of | |
2077 | * the pool's capacity. | |
2078 | */ | |
2079 | if (vd->vdev_mg->mg_class != spa->spa_normal_class) | |
2080 | return; | |
2081 | ||
2082 | mutex_enter(&rvd->vdev_stat_lock); | |
2083 | rvd->vdev_stat.vs_space += space_delta; | |
2084 | rvd->vdev_stat.vs_alloc += alloc_delta; | |
2085 | rvd->vdev_stat.vs_dspace += dspace_delta; | |
2086 | mutex_exit(&rvd->vdev_stat_lock); | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | /* | |
2091 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
2092 | * so that it will be written out next time the vdev configuration is synced. | |
2093 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
2094 | */ | |
2095 | void | |
2096 | vdev_config_dirty(vdev_t *vd) | |
2097 | { | |
2098 | spa_t *spa = vd->vdev_spa; | |
2099 | vdev_t *rvd = spa->spa_root_vdev; | |
2100 | int c; | |
2101 | ||
2102 | /* | |
b128c09f BB |
2103 | * If this is an aux vdev (as with l2cache devices), then we update the |
2104 | * vdev config manually and set the sync flag. | |
2105 | */ | |
2106 | if (vd->vdev_aux != NULL) { | |
2107 | spa_aux_vdev_t *sav = vd->vdev_aux; | |
2108 | nvlist_t **aux; | |
2109 | uint_t naux; | |
2110 | ||
2111 | for (c = 0; c < sav->sav_count; c++) { | |
2112 | if (sav->sav_vdevs[c] == vd) | |
2113 | break; | |
2114 | } | |
2115 | ||
2116 | if (c == sav->sav_count) { | |
2117 | /* | |
2118 | * We're being removed. There's nothing more to do. | |
2119 | */ | |
2120 | ASSERT(sav->sav_sync == B_TRUE); | |
2121 | return; | |
2122 | } | |
2123 | ||
2124 | sav->sav_sync = B_TRUE; | |
2125 | ||
2126 | VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, | |
2127 | ZPOOL_CONFIG_L2CACHE, &aux, &naux) == 0); | |
2128 | ||
2129 | ASSERT(c < naux); | |
2130 | ||
2131 | /* | |
2132 | * Setting the nvlist in the middle if the array is a little | |
2133 | * sketchy, but it will work. | |
2134 | */ | |
2135 | nvlist_free(aux[c]); | |
2136 | aux[c] = vdev_config_generate(spa, vd, B_TRUE, B_FALSE, B_TRUE); | |
2137 | ||
2138 | return; | |
2139 | } | |
2140 | ||
2141 | /* | |
2142 | * The dirty list is protected by the SCL_CONFIG lock. The caller | |
2143 | * must either hold SCL_CONFIG as writer, or must be the sync thread | |
2144 | * (which holds SCL_CONFIG as reader). There's only one sync thread, | |
34dc7c2f BB |
2145 | * so this is sufficient to ensure mutual exclusion. |
2146 | */ | |
b128c09f BB |
2147 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2148 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2149 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f BB |
2150 | |
2151 | if (vd == rvd) { | |
2152 | for (c = 0; c < rvd->vdev_children; c++) | |
2153 | vdev_config_dirty(rvd->vdev_child[c]); | |
2154 | } else { | |
2155 | ASSERT(vd == vd->vdev_top); | |
2156 | ||
b128c09f BB |
2157 | if (!list_link_active(&vd->vdev_config_dirty_node)) |
2158 | list_insert_head(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2159 | } |
2160 | } | |
2161 | ||
2162 | void | |
2163 | vdev_config_clean(vdev_t *vd) | |
2164 | { | |
2165 | spa_t *spa = vd->vdev_spa; | |
2166 | ||
b128c09f BB |
2167 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2168 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2169 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f | 2170 | |
b128c09f BB |
2171 | ASSERT(list_link_active(&vd->vdev_config_dirty_node)); |
2172 | list_remove(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2173 | } |
2174 | ||
b128c09f BB |
2175 | /* |
2176 | * Mark a top-level vdev's state as dirty, so that the next pass of | |
2177 | * spa_sync() can convert this into vdev_config_dirty(). We distinguish | |
2178 | * the state changes from larger config changes because they require | |
2179 | * much less locking, and are often needed for administrative actions. | |
2180 | */ | |
2181 | void | |
2182 | vdev_state_dirty(vdev_t *vd) | |
2183 | { | |
2184 | spa_t *spa = vd->vdev_spa; | |
2185 | ||
2186 | ASSERT(vd == vd->vdev_top); | |
2187 | ||
2188 | /* | |
2189 | * The state list is protected by the SCL_STATE lock. The caller | |
2190 | * must either hold SCL_STATE as writer, or must be the sync thread | |
2191 | * (which holds SCL_STATE as reader). There's only one sync thread, | |
2192 | * so this is sufficient to ensure mutual exclusion. | |
2193 | */ | |
2194 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2195 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2196 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2197 | ||
2198 | if (!list_link_active(&vd->vdev_state_dirty_node)) | |
2199 | list_insert_head(&spa->spa_state_dirty_list, vd); | |
2200 | } | |
2201 | ||
2202 | void | |
2203 | vdev_state_clean(vdev_t *vd) | |
2204 | { | |
2205 | spa_t *spa = vd->vdev_spa; | |
2206 | ||
2207 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2208 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2209 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2210 | ||
2211 | ASSERT(list_link_active(&vd->vdev_state_dirty_node)); | |
2212 | list_remove(&spa->spa_state_dirty_list, vd); | |
2213 | } | |
2214 | ||
2215 | /* | |
2216 | * Propagate vdev state up from children to parent. | |
2217 | */ | |
34dc7c2f BB |
2218 | void |
2219 | vdev_propagate_state(vdev_t *vd) | |
2220 | { | |
2221 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
2222 | int degraded = 0, faulted = 0; | |
2223 | int corrupted = 0; | |
2224 | int c; | |
2225 | vdev_t *child; | |
2226 | ||
2227 | if (vd->vdev_children > 0) { | |
2228 | for (c = 0; c < vd->vdev_children; c++) { | |
2229 | child = vd->vdev_child[c]; | |
b128c09f BB |
2230 | |
2231 | if (!vdev_readable(child) || | |
2232 | (!vdev_writeable(child) && (spa_mode & FWRITE))) { | |
2233 | /* | |
2234 | * Root special: if there is a top-level log | |
2235 | * device, treat the root vdev as if it were | |
2236 | * degraded. | |
2237 | */ | |
2238 | if (child->vdev_islog && vd == rvd) | |
2239 | degraded++; | |
2240 | else | |
2241 | faulted++; | |
2242 | } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { | |
34dc7c2f | 2243 | degraded++; |
b128c09f | 2244 | } |
34dc7c2f BB |
2245 | |
2246 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
2247 | corrupted++; | |
2248 | } | |
2249 | ||
2250 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
2251 | ||
2252 | /* | |
b128c09f | 2253 | * Root special: if there is a top-level vdev that cannot be |
34dc7c2f BB |
2254 | * opened due to corrupted metadata, then propagate the root |
2255 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
2256 | * replicas'. | |
2257 | */ | |
2258 | if (corrupted && vd == rvd && | |
2259 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
2260 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2261 | VDEV_AUX_CORRUPT_DATA); | |
2262 | } | |
2263 | ||
b128c09f | 2264 | if (vd->vdev_parent) |
34dc7c2f BB |
2265 | vdev_propagate_state(vd->vdev_parent); |
2266 | } | |
2267 | ||
2268 | /* | |
2269 | * Set a vdev's state. If this is during an open, we don't update the parent | |
2270 | * state, because we're in the process of opening children depth-first. | |
2271 | * Otherwise, we propagate the change to the parent. | |
2272 | * | |
2273 | * If this routine places a device in a faulted state, an appropriate ereport is | |
2274 | * generated. | |
2275 | */ | |
2276 | void | |
2277 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
2278 | { | |
2279 | uint64_t save_state; | |
b128c09f | 2280 | spa_t *spa = vd->vdev_spa; |
34dc7c2f BB |
2281 | |
2282 | if (state == vd->vdev_state) { | |
2283 | vd->vdev_stat.vs_aux = aux; | |
2284 | return; | |
2285 | } | |
2286 | ||
2287 | save_state = vd->vdev_state; | |
2288 | ||
2289 | vd->vdev_state = state; | |
2290 | vd->vdev_stat.vs_aux = aux; | |
2291 | ||
2292 | /* | |
2293 | * If we are setting the vdev state to anything but an open state, then | |
2294 | * always close the underlying device. Otherwise, we keep accessible | |
2295 | * but invalid devices open forever. We don't call vdev_close() itself, | |
2296 | * because that implies some extra checks (offline, etc) that we don't | |
2297 | * want here. This is limited to leaf devices, because otherwise | |
2298 | * closing the device will affect other children. | |
2299 | */ | |
b128c09f | 2300 | if (vdev_is_dead(vd) && vd->vdev_ops->vdev_op_leaf) |
34dc7c2f BB |
2301 | vd->vdev_ops->vdev_op_close(vd); |
2302 | ||
2303 | if (vd->vdev_removed && | |
2304 | state == VDEV_STATE_CANT_OPEN && | |
2305 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
2306 | /* | |
2307 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
2308 | * device was previously marked removed and someone attempted to | |
2309 | * reopen it. If this failed due to a nonexistent device, then | |
2310 | * keep the device in the REMOVED state. We also let this be if | |
2311 | * it is one of our special test online cases, which is only | |
2312 | * attempting to online the device and shouldn't generate an FMA | |
2313 | * fault. | |
2314 | */ | |
2315 | vd->vdev_state = VDEV_STATE_REMOVED; | |
2316 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
2317 | } else if (state == VDEV_STATE_REMOVED) { | |
2318 | /* | |
2319 | * Indicate to the ZFS DE that this device has been removed, and | |
2320 | * any recent errors should be ignored. | |
2321 | */ | |
b128c09f | 2322 | zfs_post_remove(spa, vd); |
34dc7c2f BB |
2323 | vd->vdev_removed = B_TRUE; |
2324 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
2325 | /* | |
2326 | * If we fail to open a vdev during an import, we mark it as | |
2327 | * "not available", which signifies that it was never there to | |
2328 | * begin with. Failure to open such a device is not considered | |
2329 | * an error. | |
2330 | */ | |
b128c09f BB |
2331 | if (spa->spa_load_state == SPA_LOAD_IMPORT && |
2332 | !spa->spa_import_faulted && | |
34dc7c2f BB |
2333 | vd->vdev_ops->vdev_op_leaf) |
2334 | vd->vdev_not_present = 1; | |
2335 | ||
2336 | /* | |
2337 | * Post the appropriate ereport. If the 'prevstate' field is | |
2338 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
2339 | * that this is part of a vdev_reopen(). In this case, we don't | |
2340 | * want to post the ereport if the device was already in the | |
2341 | * CANT_OPEN state beforehand. | |
2342 | * | |
2343 | * If the 'checkremove' flag is set, then this is an attempt to | |
2344 | * online the device in response to an insertion event. If we | |
2345 | * hit this case, then we have detected an insertion event for a | |
2346 | * faulted or offline device that wasn't in the removed state. | |
2347 | * In this scenario, we don't post an ereport because we are | |
2348 | * about to replace the device, or attempt an online with | |
2349 | * vdev_forcefault, which will generate the fault for us. | |
2350 | */ | |
2351 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
2352 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
b128c09f | 2353 | vd != spa->spa_root_vdev) { |
34dc7c2f BB |
2354 | const char *class; |
2355 | ||
2356 | switch (aux) { | |
2357 | case VDEV_AUX_OPEN_FAILED: | |
2358 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
2359 | break; | |
2360 | case VDEV_AUX_CORRUPT_DATA: | |
2361 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
2362 | break; | |
2363 | case VDEV_AUX_NO_REPLICAS: | |
2364 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
2365 | break; | |
2366 | case VDEV_AUX_BAD_GUID_SUM: | |
2367 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
2368 | break; | |
2369 | case VDEV_AUX_TOO_SMALL: | |
2370 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
2371 | break; | |
2372 | case VDEV_AUX_BAD_LABEL: | |
2373 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
2374 | break; | |
b128c09f BB |
2375 | case VDEV_AUX_IO_FAILURE: |
2376 | class = FM_EREPORT_ZFS_IO_FAILURE; | |
2377 | break; | |
34dc7c2f BB |
2378 | default: |
2379 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
2380 | } | |
2381 | ||
b128c09f | 2382 | zfs_ereport_post(class, spa, vd, NULL, save_state, 0); |
34dc7c2f BB |
2383 | } |
2384 | ||
2385 | /* Erase any notion of persistent removed state */ | |
2386 | vd->vdev_removed = B_FALSE; | |
2387 | } else { | |
2388 | vd->vdev_removed = B_FALSE; | |
2389 | } | |
2390 | ||
2391 | if (!isopen) | |
2392 | vdev_propagate_state(vd); | |
2393 | } | |
b128c09f BB |
2394 | |
2395 | /* | |
2396 | * Check the vdev configuration to ensure that it's capable of supporting | |
2397 | * a root pool. Currently, we do not support RAID-Z or partial configuration. | |
2398 | * In addition, only a single top-level vdev is allowed and none of the leaves | |
2399 | * can be wholedisks. | |
2400 | */ | |
2401 | boolean_t | |
2402 | vdev_is_bootable(vdev_t *vd) | |
2403 | { | |
2404 | int c; | |
2405 | ||
2406 | if (!vd->vdev_ops->vdev_op_leaf) { | |
2407 | char *vdev_type = vd->vdev_ops->vdev_op_type; | |
2408 | ||
2409 | if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && | |
2410 | vd->vdev_children > 1) { | |
2411 | return (B_FALSE); | |
2412 | } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || | |
2413 | strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { | |
2414 | return (B_FALSE); | |
2415 | } | |
2416 | } else if (vd->vdev_wholedisk == 1) { | |
2417 | return (B_FALSE); | |
2418 | } | |
2419 | ||
2420 | for (c = 0; c < vd->vdev_children; c++) { | |
2421 | if (!vdev_is_bootable(vd->vdev_child[c])) | |
2422 | return (B_FALSE); | |
2423 | } | |
2424 | return (B_TRUE); | |
2425 | } |