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1 | /* | |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Copyright (c) 2011, 2015 by Delphix. All rights reserved. | |
25 | * Copyright 2017 Nexenta Systems, Inc. | |
26 | * Copyright (c) 2014 Integros [integros.com] | |
27 | * Copyright 2016 Toomas Soome <tsoome@me.com> | |
28 | */ | |
29 | ||
30 | #include <sys/zfs_context.h> | |
31 | #include <sys/fm/fs/zfs.h> | |
32 | #include <sys/spa.h> | |
33 | #include <sys/spa_impl.h> | |
34 | #include <sys/dmu.h> | |
35 | #include <sys/dmu_tx.h> | |
36 | #include <sys/vdev_impl.h> | |
37 | #include <sys/uberblock_impl.h> | |
38 | #include <sys/metaslab.h> | |
39 | #include <sys/metaslab_impl.h> | |
40 | #include <sys/space_map.h> | |
41 | #include <sys/space_reftree.h> | |
42 | #include <sys/zio.h> | |
43 | #include <sys/zap.h> | |
44 | #include <sys/fs/zfs.h> | |
45 | #include <sys/arc.h> | |
46 | #include <sys/zil.h> | |
47 | #include <sys/dsl_scan.h> | |
48 | #include <sys/abd.h> | |
49 | #include <sys/zvol.h> | |
50 | #include <sys/zfs_ratelimit.h> | |
51 | ||
52 | /* | |
53 | * When a vdev is added, it will be divided into approximately (but no | |
54 | * more than) this number of metaslabs. | |
55 | */ | |
56 | int metaslabs_per_vdev = 200; | |
57 | ||
58 | /* | |
59 | * Virtual device management. | |
60 | */ | |
61 | ||
62 | static vdev_ops_t *vdev_ops_table[] = { | |
63 | &vdev_root_ops, | |
64 | &vdev_raidz_ops, | |
65 | &vdev_mirror_ops, | |
66 | &vdev_replacing_ops, | |
67 | &vdev_spare_ops, | |
68 | &vdev_disk_ops, | |
69 | &vdev_file_ops, | |
70 | &vdev_missing_ops, | |
71 | &vdev_hole_ops, | |
72 | NULL | |
73 | }; | |
74 | ||
75 | /* | |
76 | * Given a vdev type, return the appropriate ops vector. | |
77 | */ | |
78 | static vdev_ops_t * | |
79 | vdev_getops(const char *type) | |
80 | { | |
81 | vdev_ops_t *ops, **opspp; | |
82 | ||
83 | for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) | |
84 | if (strcmp(ops->vdev_op_type, type) == 0) | |
85 | break; | |
86 | ||
87 | return (ops); | |
88 | } | |
89 | ||
90 | /* | |
91 | * Default asize function: return the MAX of psize with the asize of | |
92 | * all children. This is what's used by anything other than RAID-Z. | |
93 | */ | |
94 | uint64_t | |
95 | vdev_default_asize(vdev_t *vd, uint64_t psize) | |
96 | { | |
97 | uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); | |
98 | uint64_t csize; | |
99 | int c; | |
100 | ||
101 | for (c = 0; c < vd->vdev_children; c++) { | |
102 | csize = vdev_psize_to_asize(vd->vdev_child[c], psize); | |
103 | asize = MAX(asize, csize); | |
104 | } | |
105 | ||
106 | return (asize); | |
107 | } | |
108 | ||
109 | /* | |
110 | * Get the minimum allocatable size. We define the allocatable size as | |
111 | * the vdev's asize rounded to the nearest metaslab. This allows us to | |
112 | * replace or attach devices which don't have the same physical size but | |
113 | * can still satisfy the same number of allocations. | |
114 | */ | |
115 | uint64_t | |
116 | vdev_get_min_asize(vdev_t *vd) | |
117 | { | |
118 | vdev_t *pvd = vd->vdev_parent; | |
119 | ||
120 | /* | |
121 | * If our parent is NULL (inactive spare or cache) or is the root, | |
122 | * just return our own asize. | |
123 | */ | |
124 | if (pvd == NULL) | |
125 | return (vd->vdev_asize); | |
126 | ||
127 | /* | |
128 | * The top-level vdev just returns the allocatable size rounded | |
129 | * to the nearest metaslab. | |
130 | */ | |
131 | if (vd == vd->vdev_top) | |
132 | return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); | |
133 | ||
134 | /* | |
135 | * The allocatable space for a raidz vdev is N * sizeof(smallest child), | |
136 | * so each child must provide at least 1/Nth of its asize. | |
137 | */ | |
138 | if (pvd->vdev_ops == &vdev_raidz_ops) | |
139 | return ((pvd->vdev_min_asize + pvd->vdev_children - 1) / | |
140 | pvd->vdev_children); | |
141 | ||
142 | return (pvd->vdev_min_asize); | |
143 | } | |
144 | ||
145 | void | |
146 | vdev_set_min_asize(vdev_t *vd) | |
147 | { | |
148 | int c; | |
149 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
150 | ||
151 | for (c = 0; c < vd->vdev_children; c++) | |
152 | vdev_set_min_asize(vd->vdev_child[c]); | |
153 | } | |
154 | ||
155 | vdev_t * | |
156 | vdev_lookup_top(spa_t *spa, uint64_t vdev) | |
157 | { | |
158 | vdev_t *rvd = spa->spa_root_vdev; | |
159 | ||
160 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); | |
161 | ||
162 | if (vdev < rvd->vdev_children) { | |
163 | ASSERT(rvd->vdev_child[vdev] != NULL); | |
164 | return (rvd->vdev_child[vdev]); | |
165 | } | |
166 | ||
167 | return (NULL); | |
168 | } | |
169 | ||
170 | vdev_t * | |
171 | vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) | |
172 | { | |
173 | vdev_t *mvd; | |
174 | int c; | |
175 | ||
176 | if (vd->vdev_guid == guid) | |
177 | return (vd); | |
178 | ||
179 | for (c = 0; c < vd->vdev_children; c++) | |
180 | if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != | |
181 | NULL) | |
182 | return (mvd); | |
183 | ||
184 | return (NULL); | |
185 | } | |
186 | ||
187 | static int | |
188 | vdev_count_leaves_impl(vdev_t *vd) | |
189 | { | |
190 | int n = 0; | |
191 | int c; | |
192 | ||
193 | if (vd->vdev_ops->vdev_op_leaf) | |
194 | return (1); | |
195 | ||
196 | for (c = 0; c < vd->vdev_children; c++) | |
197 | n += vdev_count_leaves_impl(vd->vdev_child[c]); | |
198 | ||
199 | return (n); | |
200 | } | |
201 | ||
202 | int | |
203 | vdev_count_leaves(spa_t *spa) | |
204 | { | |
205 | return (vdev_count_leaves_impl(spa->spa_root_vdev)); | |
206 | } | |
207 | ||
208 | void | |
209 | vdev_add_child(vdev_t *pvd, vdev_t *cvd) | |
210 | { | |
211 | size_t oldsize, newsize; | |
212 | uint64_t id = cvd->vdev_id; | |
213 | vdev_t **newchild; | |
214 | ||
215 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
216 | ASSERT(cvd->vdev_parent == NULL); | |
217 | ||
218 | cvd->vdev_parent = pvd; | |
219 | ||
220 | if (pvd == NULL) | |
221 | return; | |
222 | ||
223 | ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); | |
224 | ||
225 | oldsize = pvd->vdev_children * sizeof (vdev_t *); | |
226 | pvd->vdev_children = MAX(pvd->vdev_children, id + 1); | |
227 | newsize = pvd->vdev_children * sizeof (vdev_t *); | |
228 | ||
229 | newchild = kmem_alloc(newsize, KM_SLEEP); | |
230 | if (pvd->vdev_child != NULL) { | |
231 | bcopy(pvd->vdev_child, newchild, oldsize); | |
232 | kmem_free(pvd->vdev_child, oldsize); | |
233 | } | |
234 | ||
235 | pvd->vdev_child = newchild; | |
236 | pvd->vdev_child[id] = cvd; | |
237 | ||
238 | cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); | |
239 | ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); | |
240 | ||
241 | /* | |
242 | * Walk up all ancestors to update guid sum. | |
243 | */ | |
244 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
245 | pvd->vdev_guid_sum += cvd->vdev_guid_sum; | |
246 | } | |
247 | ||
248 | void | |
249 | vdev_remove_child(vdev_t *pvd, vdev_t *cvd) | |
250 | { | |
251 | int c; | |
252 | uint_t id = cvd->vdev_id; | |
253 | ||
254 | ASSERT(cvd->vdev_parent == pvd); | |
255 | ||
256 | if (pvd == NULL) | |
257 | return; | |
258 | ||
259 | ASSERT(id < pvd->vdev_children); | |
260 | ASSERT(pvd->vdev_child[id] == cvd); | |
261 | ||
262 | pvd->vdev_child[id] = NULL; | |
263 | cvd->vdev_parent = NULL; | |
264 | ||
265 | for (c = 0; c < pvd->vdev_children; c++) | |
266 | if (pvd->vdev_child[c]) | |
267 | break; | |
268 | ||
269 | if (c == pvd->vdev_children) { | |
270 | kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); | |
271 | pvd->vdev_child = NULL; | |
272 | pvd->vdev_children = 0; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Walk up all ancestors to update guid sum. | |
277 | */ | |
278 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
279 | pvd->vdev_guid_sum -= cvd->vdev_guid_sum; | |
280 | } | |
281 | ||
282 | /* | |
283 | * Remove any holes in the child array. | |
284 | */ | |
285 | void | |
286 | vdev_compact_children(vdev_t *pvd) | |
287 | { | |
288 | vdev_t **newchild, *cvd; | |
289 | int oldc = pvd->vdev_children; | |
290 | int newc; | |
291 | int c; | |
292 | ||
293 | ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
294 | ||
295 | for (c = newc = 0; c < oldc; c++) | |
296 | if (pvd->vdev_child[c]) | |
297 | newc++; | |
298 | ||
299 | newchild = kmem_zalloc(newc * sizeof (vdev_t *), KM_SLEEP); | |
300 | ||
301 | for (c = newc = 0; c < oldc; c++) { | |
302 | if ((cvd = pvd->vdev_child[c]) != NULL) { | |
303 | newchild[newc] = cvd; | |
304 | cvd->vdev_id = newc++; | |
305 | } | |
306 | } | |
307 | ||
308 | kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); | |
309 | pvd->vdev_child = newchild; | |
310 | pvd->vdev_children = newc; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Allocate and minimally initialize a vdev_t. | |
315 | */ | |
316 | vdev_t * | |
317 | vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) | |
318 | { | |
319 | vdev_t *vd; | |
320 | int t; | |
321 | ||
322 | vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); | |
323 | ||
324 | if (spa->spa_root_vdev == NULL) { | |
325 | ASSERT(ops == &vdev_root_ops); | |
326 | spa->spa_root_vdev = vd; | |
327 | spa->spa_load_guid = spa_generate_guid(NULL); | |
328 | } | |
329 | ||
330 | if (guid == 0 && ops != &vdev_hole_ops) { | |
331 | if (spa->spa_root_vdev == vd) { | |
332 | /* | |
333 | * The root vdev's guid will also be the pool guid, | |
334 | * which must be unique among all pools. | |
335 | */ | |
336 | guid = spa_generate_guid(NULL); | |
337 | } else { | |
338 | /* | |
339 | * Any other vdev's guid must be unique within the pool. | |
340 | */ | |
341 | guid = spa_generate_guid(spa); | |
342 | } | |
343 | ASSERT(!spa_guid_exists(spa_guid(spa), guid)); | |
344 | } | |
345 | ||
346 | vd->vdev_spa = spa; | |
347 | vd->vdev_id = id; | |
348 | vd->vdev_guid = guid; | |
349 | vd->vdev_guid_sum = guid; | |
350 | vd->vdev_ops = ops; | |
351 | vd->vdev_state = VDEV_STATE_CLOSED; | |
352 | vd->vdev_ishole = (ops == &vdev_hole_ops); | |
353 | ||
354 | /* | |
355 | * Initialize rate limit structs for events. We rate limit ZIO delay | |
356 | * and checksum events so that we don't overwhelm ZED with thousands | |
357 | * of events when a disk is acting up. | |
358 | */ | |
359 | zfs_ratelimit_init(&vd->vdev_delay_rl, DELAYS_PER_SECOND, 1); | |
360 | zfs_ratelimit_init(&vd->vdev_checksum_rl, CHECKSUMS_PER_SECOND, 1); | |
361 | ||
362 | list_link_init(&vd->vdev_config_dirty_node); | |
363 | list_link_init(&vd->vdev_state_dirty_node); | |
364 | mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_NOLOCKDEP, NULL); | |
365 | mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); | |
366 | mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); | |
367 | mutex_init(&vd->vdev_queue_lock, NULL, MUTEX_DEFAULT, NULL); | |
368 | ||
369 | for (t = 0; t < DTL_TYPES; t++) { | |
370 | vd->vdev_dtl[t] = range_tree_create(NULL, NULL, | |
371 | &vd->vdev_dtl_lock); | |
372 | } | |
373 | txg_list_create(&vd->vdev_ms_list, spa, | |
374 | offsetof(struct metaslab, ms_txg_node)); | |
375 | txg_list_create(&vd->vdev_dtl_list, spa, | |
376 | offsetof(struct vdev, vdev_dtl_node)); | |
377 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
378 | vdev_queue_init(vd); | |
379 | vdev_cache_init(vd); | |
380 | ||
381 | return (vd); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
386 | * creating a new vdev or loading an existing one - the behavior is slightly | |
387 | * different for each case. | |
388 | */ | |
389 | int | |
390 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
391 | int alloctype) | |
392 | { | |
393 | vdev_ops_t *ops; | |
394 | char *type; | |
395 | uint64_t guid = 0, islog, nparity; | |
396 | vdev_t *vd; | |
397 | char *tmp = NULL; | |
398 | int rc; | |
399 | ||
400 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
401 | ||
402 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
403 | return (SET_ERROR(EINVAL)); | |
404 | ||
405 | if ((ops = vdev_getops(type)) == NULL) | |
406 | return (SET_ERROR(EINVAL)); | |
407 | ||
408 | /* | |
409 | * If this is a load, get the vdev guid from the nvlist. | |
410 | * Otherwise, vdev_alloc_common() will generate one for us. | |
411 | */ | |
412 | if (alloctype == VDEV_ALLOC_LOAD) { | |
413 | uint64_t label_id; | |
414 | ||
415 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
416 | label_id != id) | |
417 | return (SET_ERROR(EINVAL)); | |
418 | ||
419 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
420 | return (SET_ERROR(EINVAL)); | |
421 | } else if (alloctype == VDEV_ALLOC_SPARE) { | |
422 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
423 | return (SET_ERROR(EINVAL)); | |
424 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { | |
425 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
426 | return (SET_ERROR(EINVAL)); | |
427 | } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { | |
428 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
429 | return (SET_ERROR(EINVAL)); | |
430 | } | |
431 | ||
432 | /* | |
433 | * The first allocated vdev must be of type 'root'. | |
434 | */ | |
435 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
436 | return (SET_ERROR(EINVAL)); | |
437 | ||
438 | /* | |
439 | * Determine whether we're a log vdev. | |
440 | */ | |
441 | islog = 0; | |
442 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
443 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
444 | return (SET_ERROR(ENOTSUP)); | |
445 | ||
446 | if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) | |
447 | return (SET_ERROR(ENOTSUP)); | |
448 | ||
449 | /* | |
450 | * Set the nparity property for RAID-Z vdevs. | |
451 | */ | |
452 | nparity = -1ULL; | |
453 | if (ops == &vdev_raidz_ops) { | |
454 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
455 | &nparity) == 0) { | |
456 | if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) | |
457 | return (SET_ERROR(EINVAL)); | |
458 | /* | |
459 | * Previous versions could only support 1 or 2 parity | |
460 | * device. | |
461 | */ | |
462 | if (nparity > 1 && | |
463 | spa_version(spa) < SPA_VERSION_RAIDZ2) | |
464 | return (SET_ERROR(ENOTSUP)); | |
465 | if (nparity > 2 && | |
466 | spa_version(spa) < SPA_VERSION_RAIDZ3) | |
467 | return (SET_ERROR(ENOTSUP)); | |
468 | } else { | |
469 | /* | |
470 | * We require the parity to be specified for SPAs that | |
471 | * support multiple parity levels. | |
472 | */ | |
473 | if (spa_version(spa) >= SPA_VERSION_RAIDZ2) | |
474 | return (SET_ERROR(EINVAL)); | |
475 | /* | |
476 | * Otherwise, we default to 1 parity device for RAID-Z. | |
477 | */ | |
478 | nparity = 1; | |
479 | } | |
480 | } else { | |
481 | nparity = 0; | |
482 | } | |
483 | ASSERT(nparity != -1ULL); | |
484 | ||
485 | vd = vdev_alloc_common(spa, id, guid, ops); | |
486 | ||
487 | vd->vdev_islog = islog; | |
488 | vd->vdev_nparity = nparity; | |
489 | ||
490 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
491 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
492 | ||
493 | /* | |
494 | * ZPOOL_CONFIG_AUX_STATE = "external" means we previously forced a | |
495 | * fault on a vdev and want it to persist across imports (like with | |
496 | * zpool offline -f). | |
497 | */ | |
498 | rc = nvlist_lookup_string(nv, ZPOOL_CONFIG_AUX_STATE, &tmp); | |
499 | if (rc == 0 && tmp != NULL && strcmp(tmp, "external") == 0) { | |
500 | vd->vdev_stat.vs_aux = VDEV_AUX_EXTERNAL; | |
501 | vd->vdev_faulted = 1; | |
502 | vd->vdev_label_aux = VDEV_AUX_EXTERNAL; | |
503 | } | |
504 | ||
505 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) | |
506 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
507 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
508 | &vd->vdev_physpath) == 0) | |
509 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
510 | ||
511 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, | |
512 | &vd->vdev_enc_sysfs_path) == 0) | |
513 | vd->vdev_enc_sysfs_path = spa_strdup(vd->vdev_enc_sysfs_path); | |
514 | ||
515 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) | |
516 | vd->vdev_fru = spa_strdup(vd->vdev_fru); | |
517 | ||
518 | /* | |
519 | * Set the whole_disk property. If it's not specified, leave the value | |
520 | * as -1. | |
521 | */ | |
522 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
523 | &vd->vdev_wholedisk) != 0) | |
524 | vd->vdev_wholedisk = -1ULL; | |
525 | ||
526 | /* | |
527 | * Look for the 'not present' flag. This will only be set if the device | |
528 | * was not present at the time of import. | |
529 | */ | |
530 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, | |
531 | &vd->vdev_not_present); | |
532 | ||
533 | /* | |
534 | * Get the alignment requirement. | |
535 | */ | |
536 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
537 | ||
538 | /* | |
539 | * Retrieve the vdev creation time. | |
540 | */ | |
541 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, | |
542 | &vd->vdev_crtxg); | |
543 | ||
544 | /* | |
545 | * If we're a top-level vdev, try to load the allocation parameters. | |
546 | */ | |
547 | if (parent && !parent->vdev_parent && | |
548 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { | |
549 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, | |
550 | &vd->vdev_ms_array); | |
551 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
552 | &vd->vdev_ms_shift); | |
553 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
554 | &vd->vdev_asize); | |
555 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, | |
556 | &vd->vdev_removing); | |
557 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_VDEV_TOP_ZAP, | |
558 | &vd->vdev_top_zap); | |
559 | } else { | |
560 | ASSERT0(vd->vdev_top_zap); | |
561 | } | |
562 | ||
563 | if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) { | |
564 | ASSERT(alloctype == VDEV_ALLOC_LOAD || | |
565 | alloctype == VDEV_ALLOC_ADD || | |
566 | alloctype == VDEV_ALLOC_SPLIT || | |
567 | alloctype == VDEV_ALLOC_ROOTPOOL); | |
568 | vd->vdev_mg = metaslab_group_create(islog ? | |
569 | spa_log_class(spa) : spa_normal_class(spa), vd); | |
570 | } | |
571 | ||
572 | if (vd->vdev_ops->vdev_op_leaf && | |
573 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { | |
574 | (void) nvlist_lookup_uint64(nv, | |
575 | ZPOOL_CONFIG_VDEV_LEAF_ZAP, &vd->vdev_leaf_zap); | |
576 | } else { | |
577 | ASSERT0(vd->vdev_leaf_zap); | |
578 | } | |
579 | ||
580 | /* | |
581 | * If we're a leaf vdev, try to load the DTL object and other state. | |
582 | */ | |
583 | ||
584 | if (vd->vdev_ops->vdev_op_leaf && | |
585 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || | |
586 | alloctype == VDEV_ALLOC_ROOTPOOL)) { | |
587 | if (alloctype == VDEV_ALLOC_LOAD) { | |
588 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
589 | &vd->vdev_dtl_object); | |
590 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, | |
591 | &vd->vdev_unspare); | |
592 | } | |
593 | ||
594 | if (alloctype == VDEV_ALLOC_ROOTPOOL) { | |
595 | uint64_t spare = 0; | |
596 | ||
597 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, | |
598 | &spare) == 0 && spare) | |
599 | spa_spare_add(vd); | |
600 | } | |
601 | ||
602 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, | |
603 | &vd->vdev_offline); | |
604 | ||
605 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVER_TXG, | |
606 | &vd->vdev_resilver_txg); | |
607 | ||
608 | /* | |
609 | * In general, when importing a pool we want to ignore the | |
610 | * persistent fault state, as the diagnosis made on another | |
611 | * system may not be valid in the current context. The only | |
612 | * exception is if we forced a vdev to a persistently faulted | |
613 | * state with 'zpool offline -f'. The persistent fault will | |
614 | * remain across imports until cleared. | |
615 | * | |
616 | * Local vdevs will remain in the faulted state. | |
617 | */ | |
618 | if (spa_load_state(spa) == SPA_LOAD_OPEN || | |
619 | spa_load_state(spa) == SPA_LOAD_IMPORT) { | |
620 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, | |
621 | &vd->vdev_faulted); | |
622 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
623 | &vd->vdev_degraded); | |
624 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
625 | &vd->vdev_removed); | |
626 | ||
627 | if (vd->vdev_faulted || vd->vdev_degraded) { | |
628 | char *aux; | |
629 | ||
630 | vd->vdev_label_aux = | |
631 | VDEV_AUX_ERR_EXCEEDED; | |
632 | if (nvlist_lookup_string(nv, | |
633 | ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && | |
634 | strcmp(aux, "external") == 0) | |
635 | vd->vdev_label_aux = VDEV_AUX_EXTERNAL; | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
640 | /* | |
641 | * Add ourselves to the parent's list of children. | |
642 | */ | |
643 | vdev_add_child(parent, vd); | |
644 | ||
645 | *vdp = vd; | |
646 | ||
647 | return (0); | |
648 | } | |
649 | ||
650 | void | |
651 | vdev_free(vdev_t *vd) | |
652 | { | |
653 | int c, t; | |
654 | spa_t *spa = vd->vdev_spa; | |
655 | ||
656 | /* | |
657 | * vdev_free() implies closing the vdev first. This is simpler than | |
658 | * trying to ensure complicated semantics for all callers. | |
659 | */ | |
660 | vdev_close(vd); | |
661 | ||
662 | ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); | |
663 | ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); | |
664 | ||
665 | /* | |
666 | * Free all children. | |
667 | */ | |
668 | for (c = 0; c < vd->vdev_children; c++) | |
669 | vdev_free(vd->vdev_child[c]); | |
670 | ||
671 | ASSERT(vd->vdev_child == NULL); | |
672 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
673 | ||
674 | /* | |
675 | * Discard allocation state. | |
676 | */ | |
677 | if (vd->vdev_mg != NULL) { | |
678 | vdev_metaslab_fini(vd); | |
679 | metaslab_group_destroy(vd->vdev_mg); | |
680 | } | |
681 | ||
682 | ASSERT0(vd->vdev_stat.vs_space); | |
683 | ASSERT0(vd->vdev_stat.vs_dspace); | |
684 | ASSERT0(vd->vdev_stat.vs_alloc); | |
685 | ||
686 | /* | |
687 | * Remove this vdev from its parent's child list. | |
688 | */ | |
689 | vdev_remove_child(vd->vdev_parent, vd); | |
690 | ||
691 | ASSERT(vd->vdev_parent == NULL); | |
692 | ||
693 | /* | |
694 | * Clean up vdev structure. | |
695 | */ | |
696 | vdev_queue_fini(vd); | |
697 | vdev_cache_fini(vd); | |
698 | ||
699 | if (vd->vdev_path) | |
700 | spa_strfree(vd->vdev_path); | |
701 | if (vd->vdev_devid) | |
702 | spa_strfree(vd->vdev_devid); | |
703 | if (vd->vdev_physpath) | |
704 | spa_strfree(vd->vdev_physpath); | |
705 | ||
706 | if (vd->vdev_enc_sysfs_path) | |
707 | spa_strfree(vd->vdev_enc_sysfs_path); | |
708 | ||
709 | if (vd->vdev_fru) | |
710 | spa_strfree(vd->vdev_fru); | |
711 | ||
712 | if (vd->vdev_isspare) | |
713 | spa_spare_remove(vd); | |
714 | if (vd->vdev_isl2cache) | |
715 | spa_l2cache_remove(vd); | |
716 | ||
717 | txg_list_destroy(&vd->vdev_ms_list); | |
718 | txg_list_destroy(&vd->vdev_dtl_list); | |
719 | ||
720 | mutex_enter(&vd->vdev_dtl_lock); | |
721 | space_map_close(vd->vdev_dtl_sm); | |
722 | for (t = 0; t < DTL_TYPES; t++) { | |
723 | range_tree_vacate(vd->vdev_dtl[t], NULL, NULL); | |
724 | range_tree_destroy(vd->vdev_dtl[t]); | |
725 | } | |
726 | mutex_exit(&vd->vdev_dtl_lock); | |
727 | ||
728 | mutex_destroy(&vd->vdev_queue_lock); | |
729 | mutex_destroy(&vd->vdev_dtl_lock); | |
730 | mutex_destroy(&vd->vdev_stat_lock); | |
731 | mutex_destroy(&vd->vdev_probe_lock); | |
732 | ||
733 | zfs_ratelimit_fini(&vd->vdev_delay_rl); | |
734 | zfs_ratelimit_fini(&vd->vdev_checksum_rl); | |
735 | ||
736 | if (vd == spa->spa_root_vdev) | |
737 | spa->spa_root_vdev = NULL; | |
738 | ||
739 | kmem_free(vd, sizeof (vdev_t)); | |
740 | } | |
741 | ||
742 | /* | |
743 | * Transfer top-level vdev state from svd to tvd. | |
744 | */ | |
745 | static void | |
746 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
747 | { | |
748 | spa_t *spa = svd->vdev_spa; | |
749 | metaslab_t *msp; | |
750 | vdev_t *vd; | |
751 | int t; | |
752 | ||
753 | ASSERT(tvd == tvd->vdev_top); | |
754 | ||
755 | tvd->vdev_pending_fastwrite = svd->vdev_pending_fastwrite; | |
756 | tvd->vdev_ms_array = svd->vdev_ms_array; | |
757 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
758 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
759 | tvd->vdev_top_zap = svd->vdev_top_zap; | |
760 | ||
761 | svd->vdev_ms_array = 0; | |
762 | svd->vdev_ms_shift = 0; | |
763 | svd->vdev_ms_count = 0; | |
764 | svd->vdev_top_zap = 0; | |
765 | ||
766 | if (tvd->vdev_mg) | |
767 | ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg); | |
768 | tvd->vdev_mg = svd->vdev_mg; | |
769 | tvd->vdev_ms = svd->vdev_ms; | |
770 | ||
771 | svd->vdev_mg = NULL; | |
772 | svd->vdev_ms = NULL; | |
773 | ||
774 | if (tvd->vdev_mg != NULL) | |
775 | tvd->vdev_mg->mg_vd = tvd; | |
776 | ||
777 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; | |
778 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
779 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
780 | ||
781 | svd->vdev_stat.vs_alloc = 0; | |
782 | svd->vdev_stat.vs_space = 0; | |
783 | svd->vdev_stat.vs_dspace = 0; | |
784 | ||
785 | for (t = 0; t < TXG_SIZE; t++) { | |
786 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
787 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
788 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
789 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
790 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
791 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
792 | } | |
793 | ||
794 | if (list_link_active(&svd->vdev_config_dirty_node)) { | |
795 | vdev_config_clean(svd); | |
796 | vdev_config_dirty(tvd); | |
797 | } | |
798 | ||
799 | if (list_link_active(&svd->vdev_state_dirty_node)) { | |
800 | vdev_state_clean(svd); | |
801 | vdev_state_dirty(tvd); | |
802 | } | |
803 | ||
804 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; | |
805 | svd->vdev_deflate_ratio = 0; | |
806 | ||
807 | tvd->vdev_islog = svd->vdev_islog; | |
808 | svd->vdev_islog = 0; | |
809 | } | |
810 | ||
811 | static void | |
812 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
813 | { | |
814 | int c; | |
815 | ||
816 | if (vd == NULL) | |
817 | return; | |
818 | ||
819 | vd->vdev_top = tvd; | |
820 | ||
821 | for (c = 0; c < vd->vdev_children; c++) | |
822 | vdev_top_update(tvd, vd->vdev_child[c]); | |
823 | } | |
824 | ||
825 | /* | |
826 | * Add a mirror/replacing vdev above an existing vdev. | |
827 | */ | |
828 | vdev_t * | |
829 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
830 | { | |
831 | spa_t *spa = cvd->vdev_spa; | |
832 | vdev_t *pvd = cvd->vdev_parent; | |
833 | vdev_t *mvd; | |
834 | ||
835 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
836 | ||
837 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
838 | ||
839 | mvd->vdev_asize = cvd->vdev_asize; | |
840 | mvd->vdev_min_asize = cvd->vdev_min_asize; | |
841 | mvd->vdev_max_asize = cvd->vdev_max_asize; | |
842 | mvd->vdev_ashift = cvd->vdev_ashift; | |
843 | mvd->vdev_state = cvd->vdev_state; | |
844 | mvd->vdev_crtxg = cvd->vdev_crtxg; | |
845 | ||
846 | vdev_remove_child(pvd, cvd); | |
847 | vdev_add_child(pvd, mvd); | |
848 | cvd->vdev_id = mvd->vdev_children; | |
849 | vdev_add_child(mvd, cvd); | |
850 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
851 | ||
852 | if (mvd == mvd->vdev_top) | |
853 | vdev_top_transfer(cvd, mvd); | |
854 | ||
855 | return (mvd); | |
856 | } | |
857 | ||
858 | /* | |
859 | * Remove a 1-way mirror/replacing vdev from the tree. | |
860 | */ | |
861 | void | |
862 | vdev_remove_parent(vdev_t *cvd) | |
863 | { | |
864 | vdev_t *mvd = cvd->vdev_parent; | |
865 | vdev_t *pvd = mvd->vdev_parent; | |
866 | ||
867 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
868 | ||
869 | ASSERT(mvd->vdev_children == 1); | |
870 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
871 | mvd->vdev_ops == &vdev_replacing_ops || | |
872 | mvd->vdev_ops == &vdev_spare_ops); | |
873 | cvd->vdev_ashift = mvd->vdev_ashift; | |
874 | ||
875 | vdev_remove_child(mvd, cvd); | |
876 | vdev_remove_child(pvd, mvd); | |
877 | ||
878 | /* | |
879 | * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. | |
880 | * Otherwise, we could have detached an offline device, and when we | |
881 | * go to import the pool we'll think we have two top-level vdevs, | |
882 | * instead of a different version of the same top-level vdev. | |
883 | */ | |
884 | if (mvd->vdev_top == mvd) { | |
885 | uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; | |
886 | cvd->vdev_orig_guid = cvd->vdev_guid; | |
887 | cvd->vdev_guid += guid_delta; | |
888 | cvd->vdev_guid_sum += guid_delta; | |
889 | ||
890 | /* | |
891 | * If pool not set for autoexpand, we need to also preserve | |
892 | * mvd's asize to prevent automatic expansion of cvd. | |
893 | * Otherwise if we are adjusting the mirror by attaching and | |
894 | * detaching children of non-uniform sizes, the mirror could | |
895 | * autoexpand, unexpectedly requiring larger devices to | |
896 | * re-establish the mirror. | |
897 | */ | |
898 | if (!cvd->vdev_spa->spa_autoexpand) | |
899 | cvd->vdev_asize = mvd->vdev_asize; | |
900 | } | |
901 | cvd->vdev_id = mvd->vdev_id; | |
902 | vdev_add_child(pvd, cvd); | |
903 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
904 | ||
905 | if (cvd == cvd->vdev_top) | |
906 | vdev_top_transfer(mvd, cvd); | |
907 | ||
908 | ASSERT(mvd->vdev_children == 0); | |
909 | vdev_free(mvd); | |
910 | } | |
911 | ||
912 | int | |
913 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
914 | { | |
915 | spa_t *spa = vd->vdev_spa; | |
916 | objset_t *mos = spa->spa_meta_objset; | |
917 | uint64_t m; | |
918 | uint64_t oldc = vd->vdev_ms_count; | |
919 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
920 | metaslab_t **mspp; | |
921 | int error; | |
922 | ||
923 | ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); | |
924 | ||
925 | /* | |
926 | * This vdev is not being allocated from yet or is a hole. | |
927 | */ | |
928 | if (vd->vdev_ms_shift == 0) | |
929 | return (0); | |
930 | ||
931 | ASSERT(!vd->vdev_ishole); | |
932 | ||
933 | /* | |
934 | * Compute the raidz-deflation ratio. Note, we hard-code | |
935 | * in 128k (1 << 17) because it is the "typical" blocksize. | |
936 | * Even though SPA_MAXBLOCKSIZE changed, this algorithm can not change, | |
937 | * otherwise it would inconsistently account for existing bp's. | |
938 | */ | |
939 | vd->vdev_deflate_ratio = (1 << 17) / | |
940 | (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); | |
941 | ||
942 | ASSERT(oldc <= newc); | |
943 | ||
944 | mspp = vmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); | |
945 | ||
946 | if (oldc != 0) { | |
947 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
948 | vmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); | |
949 | } | |
950 | ||
951 | vd->vdev_ms = mspp; | |
952 | vd->vdev_ms_count = newc; | |
953 | ||
954 | for (m = oldc; m < newc; m++) { | |
955 | uint64_t object = 0; | |
956 | ||
957 | if (txg == 0) { | |
958 | error = dmu_read(mos, vd->vdev_ms_array, | |
959 | m * sizeof (uint64_t), sizeof (uint64_t), &object, | |
960 | DMU_READ_PREFETCH); | |
961 | if (error) | |
962 | return (error); | |
963 | } | |
964 | ||
965 | error = metaslab_init(vd->vdev_mg, m, object, txg, | |
966 | &(vd->vdev_ms[m])); | |
967 | if (error) | |
968 | return (error); | |
969 | } | |
970 | ||
971 | if (txg == 0) | |
972 | spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); | |
973 | ||
974 | /* | |
975 | * If the vdev is being removed we don't activate | |
976 | * the metaslabs since we want to ensure that no new | |
977 | * allocations are performed on this device. | |
978 | */ | |
979 | if (oldc == 0 && !vd->vdev_removing) | |
980 | metaslab_group_activate(vd->vdev_mg); | |
981 | ||
982 | if (txg == 0) | |
983 | spa_config_exit(spa, SCL_ALLOC, FTAG); | |
984 | ||
985 | return (0); | |
986 | } | |
987 | ||
988 | void | |
989 | vdev_metaslab_fini(vdev_t *vd) | |
990 | { | |
991 | uint64_t m; | |
992 | uint64_t count = vd->vdev_ms_count; | |
993 | ||
994 | if (vd->vdev_ms != NULL) { | |
995 | metaslab_group_passivate(vd->vdev_mg); | |
996 | for (m = 0; m < count; m++) { | |
997 | metaslab_t *msp = vd->vdev_ms[m]; | |
998 | ||
999 | if (msp != NULL) | |
1000 | metaslab_fini(msp); | |
1001 | } | |
1002 | vmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); | |
1003 | vd->vdev_ms = NULL; | |
1004 | } | |
1005 | ||
1006 | ASSERT3U(vd->vdev_pending_fastwrite, ==, 0); | |
1007 | } | |
1008 | ||
1009 | typedef struct vdev_probe_stats { | |
1010 | boolean_t vps_readable; | |
1011 | boolean_t vps_writeable; | |
1012 | int vps_flags; | |
1013 | } vdev_probe_stats_t; | |
1014 | ||
1015 | static void | |
1016 | vdev_probe_done(zio_t *zio) | |
1017 | { | |
1018 | spa_t *spa = zio->io_spa; | |
1019 | vdev_t *vd = zio->io_vd; | |
1020 | vdev_probe_stats_t *vps = zio->io_private; | |
1021 | ||
1022 | ASSERT(vd->vdev_probe_zio != NULL); | |
1023 | ||
1024 | if (zio->io_type == ZIO_TYPE_READ) { | |
1025 | if (zio->io_error == 0) | |
1026 | vps->vps_readable = 1; | |
1027 | if (zio->io_error == 0 && spa_writeable(spa)) { | |
1028 | zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, | |
1029 | zio->io_offset, zio->io_size, zio->io_abd, | |
1030 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
1031 | ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); | |
1032 | } else { | |
1033 | abd_free(zio->io_abd); | |
1034 | } | |
1035 | } else if (zio->io_type == ZIO_TYPE_WRITE) { | |
1036 | if (zio->io_error == 0) | |
1037 | vps->vps_writeable = 1; | |
1038 | abd_free(zio->io_abd); | |
1039 | } else if (zio->io_type == ZIO_TYPE_NULL) { | |
1040 | zio_t *pio; | |
1041 | zio_link_t *zl; | |
1042 | ||
1043 | vd->vdev_cant_read |= !vps->vps_readable; | |
1044 | vd->vdev_cant_write |= !vps->vps_writeable; | |
1045 | ||
1046 | if (vdev_readable(vd) && | |
1047 | (vdev_writeable(vd) || !spa_writeable(spa))) { | |
1048 | zio->io_error = 0; | |
1049 | } else { | |
1050 | ASSERT(zio->io_error != 0); | |
1051 | zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, | |
1052 | spa, vd, NULL, 0, 0); | |
1053 | zio->io_error = SET_ERROR(ENXIO); | |
1054 | } | |
1055 | ||
1056 | mutex_enter(&vd->vdev_probe_lock); | |
1057 | ASSERT(vd->vdev_probe_zio == zio); | |
1058 | vd->vdev_probe_zio = NULL; | |
1059 | mutex_exit(&vd->vdev_probe_lock); | |
1060 | ||
1061 | zl = NULL; | |
1062 | while ((pio = zio_walk_parents(zio, &zl)) != NULL) | |
1063 | if (!vdev_accessible(vd, pio)) | |
1064 | pio->io_error = SET_ERROR(ENXIO); | |
1065 | ||
1066 | kmem_free(vps, sizeof (*vps)); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * Determine whether this device is accessible. | |
1072 | * | |
1073 | * Read and write to several known locations: the pad regions of each | |
1074 | * vdev label but the first, which we leave alone in case it contains | |
1075 | * a VTOC. | |
1076 | */ | |
1077 | zio_t * | |
1078 | vdev_probe(vdev_t *vd, zio_t *zio) | |
1079 | { | |
1080 | spa_t *spa = vd->vdev_spa; | |
1081 | vdev_probe_stats_t *vps = NULL; | |
1082 | zio_t *pio; | |
1083 | int l; | |
1084 | ||
1085 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
1086 | ||
1087 | /* | |
1088 | * Don't probe the probe. | |
1089 | */ | |
1090 | if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) | |
1091 | return (NULL); | |
1092 | ||
1093 | /* | |
1094 | * To prevent 'probe storms' when a device fails, we create | |
1095 | * just one probe i/o at a time. All zios that want to probe | |
1096 | * this vdev will become parents of the probe io. | |
1097 | */ | |
1098 | mutex_enter(&vd->vdev_probe_lock); | |
1099 | ||
1100 | if ((pio = vd->vdev_probe_zio) == NULL) { | |
1101 | vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); | |
1102 | ||
1103 | vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | | |
1104 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | | |
1105 | ZIO_FLAG_TRYHARD; | |
1106 | ||
1107 | if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { | |
1108 | /* | |
1109 | * vdev_cant_read and vdev_cant_write can only | |
1110 | * transition from TRUE to FALSE when we have the | |
1111 | * SCL_ZIO lock as writer; otherwise they can only | |
1112 | * transition from FALSE to TRUE. This ensures that | |
1113 | * any zio looking at these values can assume that | |
1114 | * failures persist for the life of the I/O. That's | |
1115 | * important because when a device has intermittent | |
1116 | * connectivity problems, we want to ensure that | |
1117 | * they're ascribed to the device (ENXIO) and not | |
1118 | * the zio (EIO). | |
1119 | * | |
1120 | * Since we hold SCL_ZIO as writer here, clear both | |
1121 | * values so the probe can reevaluate from first | |
1122 | * principles. | |
1123 | */ | |
1124 | vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; | |
1125 | vd->vdev_cant_read = B_FALSE; | |
1126 | vd->vdev_cant_write = B_FALSE; | |
1127 | } | |
1128 | ||
1129 | vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, | |
1130 | vdev_probe_done, vps, | |
1131 | vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); | |
1132 | ||
1133 | /* | |
1134 | * We can't change the vdev state in this context, so we | |
1135 | * kick off an async task to do it on our behalf. | |
1136 | */ | |
1137 | if (zio != NULL) { | |
1138 | vd->vdev_probe_wanted = B_TRUE; | |
1139 | spa_async_request(spa, SPA_ASYNC_PROBE); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | if (zio != NULL) | |
1144 | zio_add_child(zio, pio); | |
1145 | ||
1146 | mutex_exit(&vd->vdev_probe_lock); | |
1147 | ||
1148 | if (vps == NULL) { | |
1149 | ASSERT(zio != NULL); | |
1150 | return (NULL); | |
1151 | } | |
1152 | ||
1153 | for (l = 1; l < VDEV_LABELS; l++) { | |
1154 | zio_nowait(zio_read_phys(pio, vd, | |
1155 | vdev_label_offset(vd->vdev_psize, l, | |
1156 | offsetof(vdev_label_t, vl_pad2)), VDEV_PAD_SIZE, | |
1157 | abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE), | |
1158 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
1159 | ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); | |
1160 | } | |
1161 | ||
1162 | if (zio == NULL) | |
1163 | return (pio); | |
1164 | ||
1165 | zio_nowait(pio); | |
1166 | return (NULL); | |
1167 | } | |
1168 | ||
1169 | static void | |
1170 | vdev_open_child(void *arg) | |
1171 | { | |
1172 | vdev_t *vd = arg; | |
1173 | ||
1174 | vd->vdev_open_thread = curthread; | |
1175 | vd->vdev_open_error = vdev_open(vd); | |
1176 | vd->vdev_open_thread = NULL; | |
1177 | } | |
1178 | ||
1179 | static boolean_t | |
1180 | vdev_uses_zvols(vdev_t *vd) | |
1181 | { | |
1182 | int c; | |
1183 | ||
1184 | #ifdef _KERNEL | |
1185 | if (zvol_is_zvol(vd->vdev_path)) | |
1186 | return (B_TRUE); | |
1187 | #endif | |
1188 | ||
1189 | for (c = 0; c < vd->vdev_children; c++) | |
1190 | if (vdev_uses_zvols(vd->vdev_child[c])) | |
1191 | return (B_TRUE); | |
1192 | ||
1193 | return (B_FALSE); | |
1194 | } | |
1195 | ||
1196 | void | |
1197 | vdev_open_children(vdev_t *vd) | |
1198 | { | |
1199 | taskq_t *tq; | |
1200 | int children = vd->vdev_children; | |
1201 | int c; | |
1202 | ||
1203 | /* | |
1204 | * in order to handle pools on top of zvols, do the opens | |
1205 | * in a single thread so that the same thread holds the | |
1206 | * spa_namespace_lock | |
1207 | */ | |
1208 | if (vdev_uses_zvols(vd)) { | |
1209 | retry_sync: | |
1210 | for (c = 0; c < children; c++) | |
1211 | vd->vdev_child[c]->vdev_open_error = | |
1212 | vdev_open(vd->vdev_child[c]); | |
1213 | } else { | |
1214 | tq = taskq_create("vdev_open", children, minclsyspri, | |
1215 | children, children, TASKQ_PREPOPULATE); | |
1216 | if (tq == NULL) | |
1217 | goto retry_sync; | |
1218 | ||
1219 | for (c = 0; c < children; c++) | |
1220 | VERIFY(taskq_dispatch(tq, vdev_open_child, | |
1221 | vd->vdev_child[c], TQ_SLEEP) != TASKQID_INVALID); | |
1222 | ||
1223 | taskq_destroy(tq); | |
1224 | } | |
1225 | ||
1226 | vd->vdev_nonrot = B_TRUE; | |
1227 | ||
1228 | for (c = 0; c < children; c++) | |
1229 | vd->vdev_nonrot &= vd->vdev_child[c]->vdev_nonrot; | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | * Prepare a virtual device for access. | |
1234 | */ | |
1235 | int | |
1236 | vdev_open(vdev_t *vd) | |
1237 | { | |
1238 | spa_t *spa = vd->vdev_spa; | |
1239 | int error; | |
1240 | uint64_t osize = 0; | |
1241 | uint64_t max_osize = 0; | |
1242 | uint64_t asize, max_asize, psize; | |
1243 | uint64_t ashift = 0; | |
1244 | int c; | |
1245 | ||
1246 | ASSERT(vd->vdev_open_thread == curthread || | |
1247 | spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1248 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || | |
1249 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
1250 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
1251 | ||
1252 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1253 | vd->vdev_cant_read = B_FALSE; | |
1254 | vd->vdev_cant_write = B_FALSE; | |
1255 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
1256 | ||
1257 | /* | |
1258 | * If this vdev is not removed, check its fault status. If it's | |
1259 | * faulted, bail out of the open. | |
1260 | */ | |
1261 | if (!vd->vdev_removed && vd->vdev_faulted) { | |
1262 | ASSERT(vd->vdev_children == 0); | |
1263 | ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || | |
1264 | vd->vdev_label_aux == VDEV_AUX_EXTERNAL); | |
1265 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
1266 | vd->vdev_label_aux); | |
1267 | return (SET_ERROR(ENXIO)); | |
1268 | } else if (vd->vdev_offline) { | |
1269 | ASSERT(vd->vdev_children == 0); | |
1270 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
1271 | return (SET_ERROR(ENXIO)); | |
1272 | } | |
1273 | ||
1274 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize, &ashift); | |
1275 | ||
1276 | /* | |
1277 | * Reset the vdev_reopening flag so that we actually close | |
1278 | * the vdev on error. | |
1279 | */ | |
1280 | vd->vdev_reopening = B_FALSE; | |
1281 | if (zio_injection_enabled && error == 0) | |
1282 | error = zio_handle_device_injection(vd, NULL, ENXIO); | |
1283 | ||
1284 | if (error) { | |
1285 | if (vd->vdev_removed && | |
1286 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
1287 | vd->vdev_removed = B_FALSE; | |
1288 | ||
1289 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1290 | vd->vdev_stat.vs_aux); | |
1291 | return (error); | |
1292 | } | |
1293 | ||
1294 | vd->vdev_removed = B_FALSE; | |
1295 | ||
1296 | /* | |
1297 | * Recheck the faulted flag now that we have confirmed that | |
1298 | * the vdev is accessible. If we're faulted, bail. | |
1299 | */ | |
1300 | if (vd->vdev_faulted) { | |
1301 | ASSERT(vd->vdev_children == 0); | |
1302 | ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || | |
1303 | vd->vdev_label_aux == VDEV_AUX_EXTERNAL); | |
1304 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
1305 | vd->vdev_label_aux); | |
1306 | return (SET_ERROR(ENXIO)); | |
1307 | } | |
1308 | ||
1309 | if (vd->vdev_degraded) { | |
1310 | ASSERT(vd->vdev_children == 0); | |
1311 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1312 | VDEV_AUX_ERR_EXCEEDED); | |
1313 | } else { | |
1314 | vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * For hole or missing vdevs we just return success. | |
1319 | */ | |
1320 | if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) | |
1321 | return (0); | |
1322 | ||
1323 | for (c = 0; c < vd->vdev_children; c++) { | |
1324 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { | |
1325 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1326 | VDEV_AUX_NONE); | |
1327 | break; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
1332 | max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t)); | |
1333 | ||
1334 | if (vd->vdev_children == 0) { | |
1335 | if (osize < SPA_MINDEVSIZE) { | |
1336 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1337 | VDEV_AUX_TOO_SMALL); | |
1338 | return (SET_ERROR(EOVERFLOW)); | |
1339 | } | |
1340 | psize = osize; | |
1341 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
1342 | max_asize = max_osize - (VDEV_LABEL_START_SIZE + | |
1343 | VDEV_LABEL_END_SIZE); | |
1344 | } else { | |
1345 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
1346 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
1347 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1348 | VDEV_AUX_TOO_SMALL); | |
1349 | return (SET_ERROR(EOVERFLOW)); | |
1350 | } | |
1351 | psize = 0; | |
1352 | asize = osize; | |
1353 | max_asize = max_osize; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * If the vdev was expanded, record this so that we can re-create the | |
1358 | * uberblock rings in labels {2,3}, during the next sync. | |
1359 | */ | |
1360 | if ((psize > vd->vdev_psize) && (vd->vdev_psize != 0)) | |
1361 | vd->vdev_copy_uberblocks = B_TRUE; | |
1362 | ||
1363 | vd->vdev_psize = psize; | |
1364 | ||
1365 | /* | |
1366 | * Make sure the allocatable size hasn't shrunk too much. | |
1367 | */ | |
1368 | if (asize < vd->vdev_min_asize) { | |
1369 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1370 | VDEV_AUX_BAD_LABEL); | |
1371 | return (SET_ERROR(EINVAL)); | |
1372 | } | |
1373 | ||
1374 | if (vd->vdev_asize == 0) { | |
1375 | /* | |
1376 | * This is the first-ever open, so use the computed values. | |
1377 | * For compatibility, a different ashift can be requested. | |
1378 | */ | |
1379 | vd->vdev_asize = asize; | |
1380 | vd->vdev_max_asize = max_asize; | |
1381 | if (vd->vdev_ashift == 0) { | |
1382 | vd->vdev_ashift = ashift; /* use detected value */ | |
1383 | } | |
1384 | if (vd->vdev_ashift != 0 && (vd->vdev_ashift < ASHIFT_MIN || | |
1385 | vd->vdev_ashift > ASHIFT_MAX)) { | |
1386 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1387 | VDEV_AUX_BAD_ASHIFT); | |
1388 | return (SET_ERROR(EDOM)); | |
1389 | } | |
1390 | } else { | |
1391 | /* | |
1392 | * Detect if the alignment requirement has increased. | |
1393 | * We don't want to make the pool unavailable, just | |
1394 | * post an event instead. | |
1395 | */ | |
1396 | if (ashift > vd->vdev_top->vdev_ashift && | |
1397 | vd->vdev_ops->vdev_op_leaf) { | |
1398 | zfs_ereport_post(FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT, | |
1399 | spa, vd, NULL, 0, 0); | |
1400 | } | |
1401 | ||
1402 | vd->vdev_max_asize = max_asize; | |
1403 | } | |
1404 | ||
1405 | /* | |
1406 | * If all children are healthy we update asize if either: | |
1407 | * The asize has increased, due to a device expansion caused by dynamic | |
1408 | * LUN growth or vdev replacement, and automatic expansion is enabled; | |
1409 | * making the additional space available. | |
1410 | * | |
1411 | * The asize has decreased, due to a device shrink usually caused by a | |
1412 | * vdev replace with a smaller device. This ensures that calculations | |
1413 | * based of max_asize and asize e.g. esize are always valid. It's safe | |
1414 | * to do this as we've already validated that asize is greater than | |
1415 | * vdev_min_asize. | |
1416 | */ | |
1417 | if (vd->vdev_state == VDEV_STATE_HEALTHY && | |
1418 | ((asize > vd->vdev_asize && | |
1419 | (vd->vdev_expanding || spa->spa_autoexpand)) || | |
1420 | (asize < vd->vdev_asize))) | |
1421 | vd->vdev_asize = asize; | |
1422 | ||
1423 | vdev_set_min_asize(vd); | |
1424 | ||
1425 | /* | |
1426 | * Ensure we can issue some IO before declaring the | |
1427 | * vdev open for business. | |
1428 | */ | |
1429 | if (vd->vdev_ops->vdev_op_leaf && | |
1430 | (error = zio_wait(vdev_probe(vd, NULL))) != 0) { | |
1431 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
1432 | VDEV_AUX_ERR_EXCEEDED); | |
1433 | return (error); | |
1434 | } | |
1435 | ||
1436 | /* | |
1437 | * Track the min and max ashift values for normal data devices. | |
1438 | */ | |
1439 | if (vd->vdev_top == vd && vd->vdev_ashift != 0 && | |
1440 | !vd->vdev_islog && vd->vdev_aux == NULL) { | |
1441 | if (vd->vdev_ashift > spa->spa_max_ashift) | |
1442 | spa->spa_max_ashift = vd->vdev_ashift; | |
1443 | if (vd->vdev_ashift < spa->spa_min_ashift) | |
1444 | spa->spa_min_ashift = vd->vdev_ashift; | |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * If a leaf vdev has a DTL, and seems healthy, then kick off a | |
1449 | * resilver. But don't do this if we are doing a reopen for a scrub, | |
1450 | * since this would just restart the scrub we are already doing. | |
1451 | */ | |
1452 | if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && | |
1453 | vdev_resilver_needed(vd, NULL, NULL)) | |
1454 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
1455 | ||
1456 | return (0); | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Called once the vdevs are all opened, this routine validates the label | |
1461 | * contents. This needs to be done before vdev_load() so that we don't | |
1462 | * inadvertently do repair I/Os to the wrong device. | |
1463 | * | |
1464 | * If 'strict' is false ignore the spa guid check. This is necessary because | |
1465 | * if the machine crashed during a re-guid the new guid might have been written | |
1466 | * to all of the vdev labels, but not the cached config. The strict check | |
1467 | * will be performed when the pool is opened again using the mos config. | |
1468 | * | |
1469 | * This function will only return failure if one of the vdevs indicates that it | |
1470 | * has since been destroyed or exported. This is only possible if | |
1471 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
1472 | * will be updated but the function will return 0. | |
1473 | */ | |
1474 | int | |
1475 | vdev_validate(vdev_t *vd, boolean_t strict) | |
1476 | { | |
1477 | spa_t *spa = vd->vdev_spa; | |
1478 | nvlist_t *label; | |
1479 | uint64_t guid = 0, top_guid; | |
1480 | uint64_t state; | |
1481 | int c; | |
1482 | ||
1483 | for (c = 0; c < vd->vdev_children; c++) | |
1484 | if (vdev_validate(vd->vdev_child[c], strict) != 0) | |
1485 | return (SET_ERROR(EBADF)); | |
1486 | ||
1487 | /* | |
1488 | * If the device has already failed, or was marked offline, don't do | |
1489 | * any further validation. Otherwise, label I/O will fail and we will | |
1490 | * overwrite the previous state. | |
1491 | */ | |
1492 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { | |
1493 | uint64_t aux_guid = 0; | |
1494 | nvlist_t *nvl; | |
1495 | uint64_t txg = spa_last_synced_txg(spa) != 0 ? | |
1496 | spa_last_synced_txg(spa) : -1ULL; | |
1497 | ||
1498 | if ((label = vdev_label_read_config(vd, txg)) == NULL) { | |
1499 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1500 | VDEV_AUX_BAD_LABEL); | |
1501 | return (0); | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * Determine if this vdev has been split off into another | |
1506 | * pool. If so, then refuse to open it. | |
1507 | */ | |
1508 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, | |
1509 | &aux_guid) == 0 && aux_guid == spa_guid(spa)) { | |
1510 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1511 | VDEV_AUX_SPLIT_POOL); | |
1512 | nvlist_free(label); | |
1513 | return (0); | |
1514 | } | |
1515 | ||
1516 | if (strict && (nvlist_lookup_uint64(label, | |
1517 | ZPOOL_CONFIG_POOL_GUID, &guid) != 0 || | |
1518 | guid != spa_guid(spa))) { | |
1519 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1520 | VDEV_AUX_CORRUPT_DATA); | |
1521 | nvlist_free(label); | |
1522 | return (0); | |
1523 | } | |
1524 | ||
1525 | if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) | |
1526 | != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, | |
1527 | &aux_guid) != 0) | |
1528 | aux_guid = 0; | |
1529 | ||
1530 | /* | |
1531 | * If this vdev just became a top-level vdev because its | |
1532 | * sibling was detached, it will have adopted the parent's | |
1533 | * vdev guid -- but the label may or may not be on disk yet. | |
1534 | * Fortunately, either version of the label will have the | |
1535 | * same top guid, so if we're a top-level vdev, we can | |
1536 | * safely compare to that instead. | |
1537 | * | |
1538 | * If we split this vdev off instead, then we also check the | |
1539 | * original pool's guid. We don't want to consider the vdev | |
1540 | * corrupt if it is partway through a split operation. | |
1541 | */ | |
1542 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, | |
1543 | &guid) != 0 || | |
1544 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, | |
1545 | &top_guid) != 0 || | |
1546 | ((vd->vdev_guid != guid && vd->vdev_guid != aux_guid) && | |
1547 | (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { | |
1548 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1549 | VDEV_AUX_CORRUPT_DATA); | |
1550 | nvlist_free(label); | |
1551 | return (0); | |
1552 | } | |
1553 | ||
1554 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1555 | &state) != 0) { | |
1556 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1557 | VDEV_AUX_CORRUPT_DATA); | |
1558 | nvlist_free(label); | |
1559 | return (0); | |
1560 | } | |
1561 | ||
1562 | nvlist_free(label); | |
1563 | ||
1564 | /* | |
1565 | * If this is a verbatim import, no need to check the | |
1566 | * state of the pool. | |
1567 | */ | |
1568 | if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && | |
1569 | spa_load_state(spa) == SPA_LOAD_OPEN && | |
1570 | state != POOL_STATE_ACTIVE) | |
1571 | return (SET_ERROR(EBADF)); | |
1572 | ||
1573 | /* | |
1574 | * If we were able to open and validate a vdev that was | |
1575 | * previously marked permanently unavailable, clear that state | |
1576 | * now. | |
1577 | */ | |
1578 | if (vd->vdev_not_present) | |
1579 | vd->vdev_not_present = 0; | |
1580 | } | |
1581 | ||
1582 | return (0); | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * Close a virtual device. | |
1587 | */ | |
1588 | void | |
1589 | vdev_close(vdev_t *vd) | |
1590 | { | |
1591 | vdev_t *pvd = vd->vdev_parent; | |
1592 | ASSERTV(spa_t *spa = vd->vdev_spa); | |
1593 | ||
1594 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1595 | ||
1596 | /* | |
1597 | * If our parent is reopening, then we are as well, unless we are | |
1598 | * going offline. | |
1599 | */ | |
1600 | if (pvd != NULL && pvd->vdev_reopening) | |
1601 | vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); | |
1602 | ||
1603 | vd->vdev_ops->vdev_op_close(vd); | |
1604 | ||
1605 | vdev_cache_purge(vd); | |
1606 | ||
1607 | /* | |
1608 | * We record the previous state before we close it, so that if we are | |
1609 | * doing a reopen(), we don't generate FMA ereports if we notice that | |
1610 | * it's still faulted. | |
1611 | */ | |
1612 | vd->vdev_prevstate = vd->vdev_state; | |
1613 | ||
1614 | if (vd->vdev_offline) | |
1615 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
1616 | else | |
1617 | vd->vdev_state = VDEV_STATE_CLOSED; | |
1618 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1619 | } | |
1620 | ||
1621 | void | |
1622 | vdev_hold(vdev_t *vd) | |
1623 | { | |
1624 | spa_t *spa = vd->vdev_spa; | |
1625 | int c; | |
1626 | ||
1627 | ASSERT(spa_is_root(spa)); | |
1628 | if (spa->spa_state == POOL_STATE_UNINITIALIZED) | |
1629 | return; | |
1630 | ||
1631 | for (c = 0; c < vd->vdev_children; c++) | |
1632 | vdev_hold(vd->vdev_child[c]); | |
1633 | ||
1634 | if (vd->vdev_ops->vdev_op_leaf) | |
1635 | vd->vdev_ops->vdev_op_hold(vd); | |
1636 | } | |
1637 | ||
1638 | void | |
1639 | vdev_rele(vdev_t *vd) | |
1640 | { | |
1641 | int c; | |
1642 | ||
1643 | ASSERT(spa_is_root(vd->vdev_spa)); | |
1644 | for (c = 0; c < vd->vdev_children; c++) | |
1645 | vdev_rele(vd->vdev_child[c]); | |
1646 | ||
1647 | if (vd->vdev_ops->vdev_op_leaf) | |
1648 | vd->vdev_ops->vdev_op_rele(vd); | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * Reopen all interior vdevs and any unopened leaves. We don't actually | |
1653 | * reopen leaf vdevs which had previously been opened as they might deadlock | |
1654 | * on the spa_config_lock. Instead we only obtain the leaf's physical size. | |
1655 | * If the leaf has never been opened then open it, as usual. | |
1656 | */ | |
1657 | void | |
1658 | vdev_reopen(vdev_t *vd) | |
1659 | { | |
1660 | spa_t *spa = vd->vdev_spa; | |
1661 | ||
1662 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1663 | ||
1664 | /* set the reopening flag unless we're taking the vdev offline */ | |
1665 | vd->vdev_reopening = !vd->vdev_offline; | |
1666 | vdev_close(vd); | |
1667 | (void) vdev_open(vd); | |
1668 | ||
1669 | /* | |
1670 | * Call vdev_validate() here to make sure we have the same device. | |
1671 | * Otherwise, a device with an invalid label could be successfully | |
1672 | * opened in response to vdev_reopen(). | |
1673 | */ | |
1674 | if (vd->vdev_aux) { | |
1675 | (void) vdev_validate_aux(vd); | |
1676 | if (vdev_readable(vd) && vdev_writeable(vd) && | |
1677 | vd->vdev_aux == &spa->spa_l2cache && | |
1678 | !l2arc_vdev_present(vd)) | |
1679 | l2arc_add_vdev(spa, vd); | |
1680 | } else { | |
1681 | (void) vdev_validate(vd, B_TRUE); | |
1682 | } | |
1683 | ||
1684 | /* | |
1685 | * Reassess parent vdev's health. | |
1686 | */ | |
1687 | vdev_propagate_state(vd); | |
1688 | } | |
1689 | ||
1690 | int | |
1691 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
1692 | { | |
1693 | int error; | |
1694 | ||
1695 | /* | |
1696 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
1697 | * For a create, however, we want to fail the request if | |
1698 | * there are any components we can't open. | |
1699 | */ | |
1700 | error = vdev_open(vd); | |
1701 | ||
1702 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
1703 | vdev_close(vd); | |
1704 | return (error ? error : ENXIO); | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * Recursively load DTLs and initialize all labels. | |
1709 | */ | |
1710 | if ((error = vdev_dtl_load(vd)) != 0 || | |
1711 | (error = vdev_label_init(vd, txg, isreplacing ? | |
1712 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { | |
1713 | vdev_close(vd); | |
1714 | return (error); | |
1715 | } | |
1716 | ||
1717 | return (0); | |
1718 | } | |
1719 | ||
1720 | void | |
1721 | vdev_metaslab_set_size(vdev_t *vd) | |
1722 | { | |
1723 | /* | |
1724 | * Aim for roughly metaslabs_per_vdev (default 200) metaslabs per vdev. | |
1725 | */ | |
1726 | vd->vdev_ms_shift = highbit64(vd->vdev_asize / metaslabs_per_vdev); | |
1727 | vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); | |
1728 | } | |
1729 | ||
1730 | void | |
1731 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
1732 | { | |
1733 | ASSERT(vd == vd->vdev_top); | |
1734 | ASSERT(!vd->vdev_ishole); | |
1735 | ASSERT(ISP2(flags)); | |
1736 | ASSERT(spa_writeable(vd->vdev_spa)); | |
1737 | ||
1738 | if (flags & VDD_METASLAB) | |
1739 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
1740 | ||
1741 | if (flags & VDD_DTL) | |
1742 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
1743 | ||
1744 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
1745 | } | |
1746 | ||
1747 | void | |
1748 | vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg) | |
1749 | { | |
1750 | int c; | |
1751 | ||
1752 | for (c = 0; c < vd->vdev_children; c++) | |
1753 | vdev_dirty_leaves(vd->vdev_child[c], flags, txg); | |
1754 | ||
1755 | if (vd->vdev_ops->vdev_op_leaf) | |
1756 | vdev_dirty(vd->vdev_top, flags, vd, txg); | |
1757 | } | |
1758 | ||
1759 | /* | |
1760 | * DTLs. | |
1761 | * | |
1762 | * A vdev's DTL (dirty time log) is the set of transaction groups for which | |
1763 | * the vdev has less than perfect replication. There are four kinds of DTL: | |
1764 | * | |
1765 | * DTL_MISSING: txgs for which the vdev has no valid copies of the data | |
1766 | * | |
1767 | * DTL_PARTIAL: txgs for which data is available, but not fully replicated | |
1768 | * | |
1769 | * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon | |
1770 | * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of | |
1771 | * txgs that was scrubbed. | |
1772 | * | |
1773 | * DTL_OUTAGE: txgs which cannot currently be read, whether due to | |
1774 | * persistent errors or just some device being offline. | |
1775 | * Unlike the other three, the DTL_OUTAGE map is not generally | |
1776 | * maintained; it's only computed when needed, typically to | |
1777 | * determine whether a device can be detached. | |
1778 | * | |
1779 | * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device | |
1780 | * either has the data or it doesn't. | |
1781 | * | |
1782 | * For interior vdevs such as mirror and RAID-Z the picture is more complex. | |
1783 | * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because | |
1784 | * if any child is less than fully replicated, then so is its parent. | |
1785 | * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, | |
1786 | * comprising only those txgs which appear in 'maxfaults' or more children; | |
1787 | * those are the txgs we don't have enough replication to read. For example, | |
1788 | * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); | |
1789 | * thus, its DTL_MISSING consists of the set of txgs that appear in more than | |
1790 | * two child DTL_MISSING maps. | |
1791 | * | |
1792 | * It should be clear from the above that to compute the DTLs and outage maps | |
1793 | * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. | |
1794 | * Therefore, that is all we keep on disk. When loading the pool, or after | |
1795 | * a configuration change, we generate all other DTLs from first principles. | |
1796 | */ | |
1797 | void | |
1798 | vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) | |
1799 | { | |
1800 | range_tree_t *rt = vd->vdev_dtl[t]; | |
1801 | ||
1802 | ASSERT(t < DTL_TYPES); | |
1803 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
1804 | ASSERT(spa_writeable(vd->vdev_spa)); | |
1805 | ||
1806 | mutex_enter(rt->rt_lock); | |
1807 | if (!range_tree_contains(rt, txg, size)) | |
1808 | range_tree_add(rt, txg, size); | |
1809 | mutex_exit(rt->rt_lock); | |
1810 | } | |
1811 | ||
1812 | boolean_t | |
1813 | vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) | |
1814 | { | |
1815 | range_tree_t *rt = vd->vdev_dtl[t]; | |
1816 | boolean_t dirty = B_FALSE; | |
1817 | ||
1818 | ASSERT(t < DTL_TYPES); | |
1819 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
1820 | ||
1821 | mutex_enter(rt->rt_lock); | |
1822 | if (range_tree_space(rt) != 0) | |
1823 | dirty = range_tree_contains(rt, txg, size); | |
1824 | mutex_exit(rt->rt_lock); | |
1825 | ||
1826 | return (dirty); | |
1827 | } | |
1828 | ||
1829 | boolean_t | |
1830 | vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) | |
1831 | { | |
1832 | range_tree_t *rt = vd->vdev_dtl[t]; | |
1833 | boolean_t empty; | |
1834 | ||
1835 | mutex_enter(rt->rt_lock); | |
1836 | empty = (range_tree_space(rt) == 0); | |
1837 | mutex_exit(rt->rt_lock); | |
1838 | ||
1839 | return (empty); | |
1840 | } | |
1841 | ||
1842 | /* | |
1843 | * Returns B_TRUE if vdev determines offset needs to be resilvered. | |
1844 | */ | |
1845 | boolean_t | |
1846 | vdev_dtl_need_resilver(vdev_t *vd, uint64_t offset, size_t psize) | |
1847 | { | |
1848 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
1849 | ||
1850 | if (vd->vdev_ops->vdev_op_need_resilver == NULL || | |
1851 | vd->vdev_ops->vdev_op_leaf) | |
1852 | return (B_TRUE); | |
1853 | ||
1854 | return (vd->vdev_ops->vdev_op_need_resilver(vd, offset, psize)); | |
1855 | } | |
1856 | ||
1857 | /* | |
1858 | * Returns the lowest txg in the DTL range. | |
1859 | */ | |
1860 | static uint64_t | |
1861 | vdev_dtl_min(vdev_t *vd) | |
1862 | { | |
1863 | range_seg_t *rs; | |
1864 | ||
1865 | ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); | |
1866 | ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0); | |
1867 | ASSERT0(vd->vdev_children); | |
1868 | ||
1869 | rs = avl_first(&vd->vdev_dtl[DTL_MISSING]->rt_root); | |
1870 | return (rs->rs_start - 1); | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * Returns the highest txg in the DTL. | |
1875 | */ | |
1876 | static uint64_t | |
1877 | vdev_dtl_max(vdev_t *vd) | |
1878 | { | |
1879 | range_seg_t *rs; | |
1880 | ||
1881 | ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); | |
1882 | ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0); | |
1883 | ASSERT0(vd->vdev_children); | |
1884 | ||
1885 | rs = avl_last(&vd->vdev_dtl[DTL_MISSING]->rt_root); | |
1886 | return (rs->rs_end); | |
1887 | } | |
1888 | ||
1889 | /* | |
1890 | * Determine if a resilvering vdev should remove any DTL entries from | |
1891 | * its range. If the vdev was resilvering for the entire duration of the | |
1892 | * scan then it should excise that range from its DTLs. Otherwise, this | |
1893 | * vdev is considered partially resilvered and should leave its DTL | |
1894 | * entries intact. The comment in vdev_dtl_reassess() describes how we | |
1895 | * excise the DTLs. | |
1896 | */ | |
1897 | static boolean_t | |
1898 | vdev_dtl_should_excise(vdev_t *vd) | |
1899 | { | |
1900 | spa_t *spa = vd->vdev_spa; | |
1901 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; | |
1902 | ||
1903 | ASSERT0(scn->scn_phys.scn_errors); | |
1904 | ASSERT0(vd->vdev_children); | |
1905 | ||
1906 | if (vd->vdev_state < VDEV_STATE_DEGRADED) | |
1907 | return (B_FALSE); | |
1908 | ||
1909 | if (vd->vdev_resilver_txg == 0 || | |
1910 | range_tree_space(vd->vdev_dtl[DTL_MISSING]) == 0) | |
1911 | return (B_TRUE); | |
1912 | ||
1913 | /* | |
1914 | * When a resilver is initiated the scan will assign the scn_max_txg | |
1915 | * value to the highest txg value that exists in all DTLs. If this | |
1916 | * device's max DTL is not part of this scan (i.e. it is not in | |
1917 | * the range (scn_min_txg, scn_max_txg] then it is not eligible | |
1918 | * for excision. | |
1919 | */ | |
1920 | if (vdev_dtl_max(vd) <= scn->scn_phys.scn_max_txg) { | |
1921 | ASSERT3U(scn->scn_phys.scn_min_txg, <=, vdev_dtl_min(vd)); | |
1922 | ASSERT3U(scn->scn_phys.scn_min_txg, <, vd->vdev_resilver_txg); | |
1923 | ASSERT3U(vd->vdev_resilver_txg, <=, scn->scn_phys.scn_max_txg); | |
1924 | return (B_TRUE); | |
1925 | } | |
1926 | return (B_FALSE); | |
1927 | } | |
1928 | ||
1929 | /* | |
1930 | * Reassess DTLs after a config change or scrub completion. | |
1931 | */ | |
1932 | void | |
1933 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
1934 | { | |
1935 | spa_t *spa = vd->vdev_spa; | |
1936 | avl_tree_t reftree; | |
1937 | int c, t, minref; | |
1938 | ||
1939 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); | |
1940 | ||
1941 | for (c = 0; c < vd->vdev_children; c++) | |
1942 | vdev_dtl_reassess(vd->vdev_child[c], txg, | |
1943 | scrub_txg, scrub_done); | |
1944 | ||
1945 | if (vd == spa->spa_root_vdev || vd->vdev_ishole || vd->vdev_aux) | |
1946 | return; | |
1947 | ||
1948 | if (vd->vdev_ops->vdev_op_leaf) { | |
1949 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; | |
1950 | ||
1951 | mutex_enter(&vd->vdev_dtl_lock); | |
1952 | ||
1953 | /* | |
1954 | * If we've completed a scan cleanly then determine | |
1955 | * if this vdev should remove any DTLs. We only want to | |
1956 | * excise regions on vdevs that were available during | |
1957 | * the entire duration of this scan. | |
1958 | */ | |
1959 | if (scrub_txg != 0 && | |
1960 | (spa->spa_scrub_started || | |
1961 | (scn != NULL && scn->scn_phys.scn_errors == 0)) && | |
1962 | vdev_dtl_should_excise(vd)) { | |
1963 | /* | |
1964 | * We completed a scrub up to scrub_txg. If we | |
1965 | * did it without rebooting, then the scrub dtl | |
1966 | * will be valid, so excise the old region and | |
1967 | * fold in the scrub dtl. Otherwise, leave the | |
1968 | * dtl as-is if there was an error. | |
1969 | * | |
1970 | * There's little trick here: to excise the beginning | |
1971 | * of the DTL_MISSING map, we put it into a reference | |
1972 | * tree and then add a segment with refcnt -1 that | |
1973 | * covers the range [0, scrub_txg). This means | |
1974 | * that each txg in that range has refcnt -1 or 0. | |
1975 | * We then add DTL_SCRUB with a refcnt of 2, so that | |
1976 | * entries in the range [0, scrub_txg) will have a | |
1977 | * positive refcnt -- either 1 or 2. We then convert | |
1978 | * the reference tree into the new DTL_MISSING map. | |
1979 | */ | |
1980 | space_reftree_create(&reftree); | |
1981 | space_reftree_add_map(&reftree, | |
1982 | vd->vdev_dtl[DTL_MISSING], 1); | |
1983 | space_reftree_add_seg(&reftree, 0, scrub_txg, -1); | |
1984 | space_reftree_add_map(&reftree, | |
1985 | vd->vdev_dtl[DTL_SCRUB], 2); | |
1986 | space_reftree_generate_map(&reftree, | |
1987 | vd->vdev_dtl[DTL_MISSING], 1); | |
1988 | space_reftree_destroy(&reftree); | |
1989 | } | |
1990 | range_tree_vacate(vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); | |
1991 | range_tree_walk(vd->vdev_dtl[DTL_MISSING], | |
1992 | range_tree_add, vd->vdev_dtl[DTL_PARTIAL]); | |
1993 | if (scrub_done) | |
1994 | range_tree_vacate(vd->vdev_dtl[DTL_SCRUB], NULL, NULL); | |
1995 | range_tree_vacate(vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); | |
1996 | if (!vdev_readable(vd)) | |
1997 | range_tree_add(vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); | |
1998 | else | |
1999 | range_tree_walk(vd->vdev_dtl[DTL_MISSING], | |
2000 | range_tree_add, vd->vdev_dtl[DTL_OUTAGE]); | |
2001 | ||
2002 | /* | |
2003 | * If the vdev was resilvering and no longer has any | |
2004 | * DTLs then reset its resilvering flag and dirty | |
2005 | * the top level so that we persist the change. | |
2006 | */ | |
2007 | if (vd->vdev_resilver_txg != 0 && | |
2008 | range_tree_space(vd->vdev_dtl[DTL_MISSING]) == 0 && | |
2009 | range_tree_space(vd->vdev_dtl[DTL_OUTAGE]) == 0) { | |
2010 | vd->vdev_resilver_txg = 0; | |
2011 | vdev_config_dirty(vd->vdev_top); | |
2012 | } | |
2013 | ||
2014 | mutex_exit(&vd->vdev_dtl_lock); | |
2015 | ||
2016 | if (txg != 0) | |
2017 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
2018 | return; | |
2019 | } | |
2020 | ||
2021 | mutex_enter(&vd->vdev_dtl_lock); | |
2022 | for (t = 0; t < DTL_TYPES; t++) { | |
2023 | int c; | |
2024 | ||
2025 | /* account for child's outage in parent's missing map */ | |
2026 | int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; | |
2027 | if (t == DTL_SCRUB) | |
2028 | continue; /* leaf vdevs only */ | |
2029 | if (t == DTL_PARTIAL) | |
2030 | minref = 1; /* i.e. non-zero */ | |
2031 | else if (vd->vdev_nparity != 0) | |
2032 | minref = vd->vdev_nparity + 1; /* RAID-Z */ | |
2033 | else | |
2034 | minref = vd->vdev_children; /* any kind of mirror */ | |
2035 | space_reftree_create(&reftree); | |
2036 | for (c = 0; c < vd->vdev_children; c++) { | |
2037 | vdev_t *cvd = vd->vdev_child[c]; | |
2038 | mutex_enter(&cvd->vdev_dtl_lock); | |
2039 | space_reftree_add_map(&reftree, cvd->vdev_dtl[s], 1); | |
2040 | mutex_exit(&cvd->vdev_dtl_lock); | |
2041 | } | |
2042 | space_reftree_generate_map(&reftree, vd->vdev_dtl[t], minref); | |
2043 | space_reftree_destroy(&reftree); | |
2044 | } | |
2045 | mutex_exit(&vd->vdev_dtl_lock); | |
2046 | } | |
2047 | ||
2048 | int | |
2049 | vdev_dtl_load(vdev_t *vd) | |
2050 | { | |
2051 | spa_t *spa = vd->vdev_spa; | |
2052 | objset_t *mos = spa->spa_meta_objset; | |
2053 | int error = 0; | |
2054 | int c; | |
2055 | ||
2056 | if (vd->vdev_ops->vdev_op_leaf && vd->vdev_dtl_object != 0) { | |
2057 | ASSERT(!vd->vdev_ishole); | |
2058 | ||
2059 | error = space_map_open(&vd->vdev_dtl_sm, mos, | |
2060 | vd->vdev_dtl_object, 0, -1ULL, 0, &vd->vdev_dtl_lock); | |
2061 | if (error) | |
2062 | return (error); | |
2063 | ASSERT(vd->vdev_dtl_sm != NULL); | |
2064 | ||
2065 | mutex_enter(&vd->vdev_dtl_lock); | |
2066 | ||
2067 | /* | |
2068 | * Now that we've opened the space_map we need to update | |
2069 | * the in-core DTL. | |
2070 | */ | |
2071 | space_map_update(vd->vdev_dtl_sm); | |
2072 | ||
2073 | error = space_map_load(vd->vdev_dtl_sm, | |
2074 | vd->vdev_dtl[DTL_MISSING], SM_ALLOC); | |
2075 | mutex_exit(&vd->vdev_dtl_lock); | |
2076 | ||
2077 | return (error); | |
2078 | } | |
2079 | ||
2080 | for (c = 0; c < vd->vdev_children; c++) { | |
2081 | error = vdev_dtl_load(vd->vdev_child[c]); | |
2082 | if (error != 0) | |
2083 | break; | |
2084 | } | |
2085 | ||
2086 | return (error); | |
2087 | } | |
2088 | ||
2089 | void | |
2090 | vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj, dmu_tx_t *tx) | |
2091 | { | |
2092 | spa_t *spa = vd->vdev_spa; | |
2093 | ||
2094 | VERIFY0(zap_destroy(spa->spa_meta_objset, zapobj, tx)); | |
2095 | VERIFY0(zap_remove_int(spa->spa_meta_objset, spa->spa_all_vdev_zaps, | |
2096 | zapobj, tx)); | |
2097 | } | |
2098 | ||
2099 | uint64_t | |
2100 | vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx) | |
2101 | { | |
2102 | spa_t *spa = vd->vdev_spa; | |
2103 | uint64_t zap = zap_create(spa->spa_meta_objset, DMU_OTN_ZAP_METADATA, | |
2104 | DMU_OT_NONE, 0, tx); | |
2105 | ||
2106 | ASSERT(zap != 0); | |
2107 | VERIFY0(zap_add_int(spa->spa_meta_objset, spa->spa_all_vdev_zaps, | |
2108 | zap, tx)); | |
2109 | ||
2110 | return (zap); | |
2111 | } | |
2112 | ||
2113 | void | |
2114 | vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx) | |
2115 | { | |
2116 | uint64_t i; | |
2117 | ||
2118 | if (vd->vdev_ops != &vdev_hole_ops && | |
2119 | vd->vdev_ops != &vdev_missing_ops && | |
2120 | vd->vdev_ops != &vdev_root_ops && | |
2121 | !vd->vdev_top->vdev_removing) { | |
2122 | if (vd->vdev_ops->vdev_op_leaf && vd->vdev_leaf_zap == 0) { | |
2123 | vd->vdev_leaf_zap = vdev_create_link_zap(vd, tx); | |
2124 | } | |
2125 | if (vd == vd->vdev_top && vd->vdev_top_zap == 0) { | |
2126 | vd->vdev_top_zap = vdev_create_link_zap(vd, tx); | |
2127 | } | |
2128 | } | |
2129 | for (i = 0; i < vd->vdev_children; i++) { | |
2130 | vdev_construct_zaps(vd->vdev_child[i], tx); | |
2131 | } | |
2132 | } | |
2133 | ||
2134 | void | |
2135 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
2136 | { | |
2137 | spa_t *spa = vd->vdev_spa; | |
2138 | range_tree_t *rt = vd->vdev_dtl[DTL_MISSING]; | |
2139 | objset_t *mos = spa->spa_meta_objset; | |
2140 | range_tree_t *rtsync; | |
2141 | kmutex_t rtlock; | |
2142 | dmu_tx_t *tx; | |
2143 | uint64_t object = space_map_object(vd->vdev_dtl_sm); | |
2144 | ||
2145 | ASSERT(!vd->vdev_ishole); | |
2146 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
2147 | ||
2148 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
2149 | ||
2150 | if (vd->vdev_detached || vd->vdev_top->vdev_removing) { | |
2151 | mutex_enter(&vd->vdev_dtl_lock); | |
2152 | space_map_free(vd->vdev_dtl_sm, tx); | |
2153 | space_map_close(vd->vdev_dtl_sm); | |
2154 | vd->vdev_dtl_sm = NULL; | |
2155 | mutex_exit(&vd->vdev_dtl_lock); | |
2156 | ||
2157 | /* | |
2158 | * We only destroy the leaf ZAP for detached leaves or for | |
2159 | * removed log devices. Removed data devices handle leaf ZAP | |
2160 | * cleanup later, once cancellation is no longer possible. | |
2161 | */ | |
2162 | if (vd->vdev_leaf_zap != 0 && (vd->vdev_detached || | |
2163 | vd->vdev_top->vdev_islog)) { | |
2164 | vdev_destroy_unlink_zap(vd, vd->vdev_leaf_zap, tx); | |
2165 | vd->vdev_leaf_zap = 0; | |
2166 | } | |
2167 | ||
2168 | dmu_tx_commit(tx); | |
2169 | return; | |
2170 | } | |
2171 | ||
2172 | if (vd->vdev_dtl_sm == NULL) { | |
2173 | uint64_t new_object; | |
2174 | ||
2175 | new_object = space_map_alloc(mos, tx); | |
2176 | VERIFY3U(new_object, !=, 0); | |
2177 | ||
2178 | VERIFY0(space_map_open(&vd->vdev_dtl_sm, mos, new_object, | |
2179 | 0, -1ULL, 0, &vd->vdev_dtl_lock)); | |
2180 | ASSERT(vd->vdev_dtl_sm != NULL); | |
2181 | } | |
2182 | ||
2183 | mutex_init(&rtlock, NULL, MUTEX_DEFAULT, NULL); | |
2184 | ||
2185 | rtsync = range_tree_create(NULL, NULL, &rtlock); | |
2186 | ||
2187 | mutex_enter(&rtlock); | |
2188 | ||
2189 | mutex_enter(&vd->vdev_dtl_lock); | |
2190 | range_tree_walk(rt, range_tree_add, rtsync); | |
2191 | mutex_exit(&vd->vdev_dtl_lock); | |
2192 | ||
2193 | space_map_truncate(vd->vdev_dtl_sm, tx); | |
2194 | space_map_write(vd->vdev_dtl_sm, rtsync, SM_ALLOC, tx); | |
2195 | range_tree_vacate(rtsync, NULL, NULL); | |
2196 | ||
2197 | range_tree_destroy(rtsync); | |
2198 | ||
2199 | mutex_exit(&rtlock); | |
2200 | mutex_destroy(&rtlock); | |
2201 | ||
2202 | /* | |
2203 | * If the object for the space map has changed then dirty | |
2204 | * the top level so that we update the config. | |
2205 | */ | |
2206 | if (object != space_map_object(vd->vdev_dtl_sm)) { | |
2207 | zfs_dbgmsg("txg %llu, spa %s, DTL old object %llu, " | |
2208 | "new object %llu", txg, spa_name(spa), object, | |
2209 | space_map_object(vd->vdev_dtl_sm)); | |
2210 | vdev_config_dirty(vd->vdev_top); | |
2211 | } | |
2212 | ||
2213 | dmu_tx_commit(tx); | |
2214 | ||
2215 | mutex_enter(&vd->vdev_dtl_lock); | |
2216 | space_map_update(vd->vdev_dtl_sm); | |
2217 | mutex_exit(&vd->vdev_dtl_lock); | |
2218 | } | |
2219 | ||
2220 | /* | |
2221 | * Determine whether the specified vdev can be offlined/detached/removed | |
2222 | * without losing data. | |
2223 | */ | |
2224 | boolean_t | |
2225 | vdev_dtl_required(vdev_t *vd) | |
2226 | { | |
2227 | spa_t *spa = vd->vdev_spa; | |
2228 | vdev_t *tvd = vd->vdev_top; | |
2229 | uint8_t cant_read = vd->vdev_cant_read; | |
2230 | boolean_t required; | |
2231 | ||
2232 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
2233 | ||
2234 | if (vd == spa->spa_root_vdev || vd == tvd) | |
2235 | return (B_TRUE); | |
2236 | ||
2237 | /* | |
2238 | * Temporarily mark the device as unreadable, and then determine | |
2239 | * whether this results in any DTL outages in the top-level vdev. | |
2240 | * If not, we can safely offline/detach/remove the device. | |
2241 | */ | |
2242 | vd->vdev_cant_read = B_TRUE; | |
2243 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
2244 | required = !vdev_dtl_empty(tvd, DTL_OUTAGE); | |
2245 | vd->vdev_cant_read = cant_read; | |
2246 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
2247 | ||
2248 | if (!required && zio_injection_enabled) | |
2249 | required = !!zio_handle_device_injection(vd, NULL, ECHILD); | |
2250 | ||
2251 | return (required); | |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | * Determine if resilver is needed, and if so the txg range. | |
2256 | */ | |
2257 | boolean_t | |
2258 | vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) | |
2259 | { | |
2260 | boolean_t needed = B_FALSE; | |
2261 | uint64_t thismin = UINT64_MAX; | |
2262 | uint64_t thismax = 0; | |
2263 | int c; | |
2264 | ||
2265 | if (vd->vdev_children == 0) { | |
2266 | mutex_enter(&vd->vdev_dtl_lock); | |
2267 | if (range_tree_space(vd->vdev_dtl[DTL_MISSING]) != 0 && | |
2268 | vdev_writeable(vd)) { | |
2269 | ||
2270 | thismin = vdev_dtl_min(vd); | |
2271 | thismax = vdev_dtl_max(vd); | |
2272 | needed = B_TRUE; | |
2273 | } | |
2274 | mutex_exit(&vd->vdev_dtl_lock); | |
2275 | } else { | |
2276 | for (c = 0; c < vd->vdev_children; c++) { | |
2277 | vdev_t *cvd = vd->vdev_child[c]; | |
2278 | uint64_t cmin, cmax; | |
2279 | ||
2280 | if (vdev_resilver_needed(cvd, &cmin, &cmax)) { | |
2281 | thismin = MIN(thismin, cmin); | |
2282 | thismax = MAX(thismax, cmax); | |
2283 | needed = B_TRUE; | |
2284 | } | |
2285 | } | |
2286 | } | |
2287 | ||
2288 | if (needed && minp) { | |
2289 | *minp = thismin; | |
2290 | *maxp = thismax; | |
2291 | } | |
2292 | return (needed); | |
2293 | } | |
2294 | ||
2295 | void | |
2296 | vdev_load(vdev_t *vd) | |
2297 | { | |
2298 | int c; | |
2299 | ||
2300 | /* | |
2301 | * Recursively load all children. | |
2302 | */ | |
2303 | for (c = 0; c < vd->vdev_children; c++) | |
2304 | vdev_load(vd->vdev_child[c]); | |
2305 | ||
2306 | /* | |
2307 | * If this is a top-level vdev, initialize its metaslabs. | |
2308 | */ | |
2309 | if (vd == vd->vdev_top && !vd->vdev_ishole && | |
2310 | (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || | |
2311 | vdev_metaslab_init(vd, 0) != 0)) | |
2312 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2313 | VDEV_AUX_CORRUPT_DATA); | |
2314 | /* | |
2315 | * If this is a leaf vdev, load its DTL. | |
2316 | */ | |
2317 | if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) | |
2318 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2319 | VDEV_AUX_CORRUPT_DATA); | |
2320 | } | |
2321 | ||
2322 | /* | |
2323 | * The special vdev case is used for hot spares and l2cache devices. Its | |
2324 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
2325 | * we make sure that we can open the underlying device, then try to read the | |
2326 | * label, and make sure that the label is sane and that it hasn't been | |
2327 | * repurposed to another pool. | |
2328 | */ | |
2329 | int | |
2330 | vdev_validate_aux(vdev_t *vd) | |
2331 | { | |
2332 | nvlist_t *label; | |
2333 | uint64_t guid, version; | |
2334 | uint64_t state; | |
2335 | ||
2336 | if (!vdev_readable(vd)) | |
2337 | return (0); | |
2338 | ||
2339 | if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) { | |
2340 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
2341 | VDEV_AUX_CORRUPT_DATA); | |
2342 | return (-1); | |
2343 | } | |
2344 | ||
2345 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
2346 | !SPA_VERSION_IS_SUPPORTED(version) || | |
2347 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || | |
2348 | guid != vd->vdev_guid || | |
2349 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
2350 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
2351 | VDEV_AUX_CORRUPT_DATA); | |
2352 | nvlist_free(label); | |
2353 | return (-1); | |
2354 | } | |
2355 | ||
2356 | /* | |
2357 | * We don't actually check the pool state here. If it's in fact in | |
2358 | * use by another pool, we update this fact on the fly when requested. | |
2359 | */ | |
2360 | nvlist_free(label); | |
2361 | return (0); | |
2362 | } | |
2363 | ||
2364 | void | |
2365 | vdev_remove(vdev_t *vd, uint64_t txg) | |
2366 | { | |
2367 | spa_t *spa = vd->vdev_spa; | |
2368 | objset_t *mos = spa->spa_meta_objset; | |
2369 | dmu_tx_t *tx; | |
2370 | int m, i; | |
2371 | ||
2372 | tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); | |
2373 | ASSERT(vd == vd->vdev_top); | |
2374 | ASSERT3U(txg, ==, spa_syncing_txg(spa)); | |
2375 | ||
2376 | if (vd->vdev_ms != NULL) { | |
2377 | metaslab_group_t *mg = vd->vdev_mg; | |
2378 | ||
2379 | metaslab_group_histogram_verify(mg); | |
2380 | metaslab_class_histogram_verify(mg->mg_class); | |
2381 | ||
2382 | for (m = 0; m < vd->vdev_ms_count; m++) { | |
2383 | metaslab_t *msp = vd->vdev_ms[m]; | |
2384 | ||
2385 | if (msp == NULL || msp->ms_sm == NULL) | |
2386 | continue; | |
2387 | ||
2388 | mutex_enter(&msp->ms_lock); | |
2389 | /* | |
2390 | * If the metaslab was not loaded when the vdev | |
2391 | * was removed then the histogram accounting may | |
2392 | * not be accurate. Update the histogram information | |
2393 | * here so that we ensure that the metaslab group | |
2394 | * and metaslab class are up-to-date. | |
2395 | */ | |
2396 | metaslab_group_histogram_remove(mg, msp); | |
2397 | ||
2398 | VERIFY0(space_map_allocated(msp->ms_sm)); | |
2399 | space_map_free(msp->ms_sm, tx); | |
2400 | space_map_close(msp->ms_sm); | |
2401 | msp->ms_sm = NULL; | |
2402 | mutex_exit(&msp->ms_lock); | |
2403 | } | |
2404 | ||
2405 | metaslab_group_histogram_verify(mg); | |
2406 | metaslab_class_histogram_verify(mg->mg_class); | |
2407 | for (i = 0; i < RANGE_TREE_HISTOGRAM_SIZE; i++) | |
2408 | ASSERT0(mg->mg_histogram[i]); | |
2409 | ||
2410 | } | |
2411 | ||
2412 | if (vd->vdev_ms_array) { | |
2413 | (void) dmu_object_free(mos, vd->vdev_ms_array, tx); | |
2414 | vd->vdev_ms_array = 0; | |
2415 | } | |
2416 | ||
2417 | if (vd->vdev_islog && vd->vdev_top_zap != 0) { | |
2418 | vdev_destroy_unlink_zap(vd, vd->vdev_top_zap, tx); | |
2419 | vd->vdev_top_zap = 0; | |
2420 | } | |
2421 | dmu_tx_commit(tx); | |
2422 | } | |
2423 | ||
2424 | void | |
2425 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
2426 | { | |
2427 | metaslab_t *msp; | |
2428 | boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); | |
2429 | ||
2430 | ASSERT(!vd->vdev_ishole); | |
2431 | ||
2432 | while ((msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg)))) | |
2433 | metaslab_sync_done(msp, txg); | |
2434 | ||
2435 | if (reassess) | |
2436 | metaslab_sync_reassess(vd->vdev_mg); | |
2437 | } | |
2438 | ||
2439 | void | |
2440 | vdev_sync(vdev_t *vd, uint64_t txg) | |
2441 | { | |
2442 | spa_t *spa = vd->vdev_spa; | |
2443 | vdev_t *lvd; | |
2444 | metaslab_t *msp; | |
2445 | dmu_tx_t *tx; | |
2446 | ||
2447 | ASSERT(!vd->vdev_ishole); | |
2448 | ||
2449 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { | |
2450 | ASSERT(vd == vd->vdev_top); | |
2451 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
2452 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
2453 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
2454 | ASSERT(vd->vdev_ms_array != 0); | |
2455 | vdev_config_dirty(vd); | |
2456 | dmu_tx_commit(tx); | |
2457 | } | |
2458 | ||
2459 | /* | |
2460 | * Remove the metadata associated with this vdev once it's empty. | |
2461 | */ | |
2462 | if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) | |
2463 | vdev_remove(vd, txg); | |
2464 | ||
2465 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { | |
2466 | metaslab_sync(msp, txg); | |
2467 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
2468 | } | |
2469 | ||
2470 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
2471 | vdev_dtl_sync(lvd, txg); | |
2472 | ||
2473 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); | |
2474 | } | |
2475 | ||
2476 | uint64_t | |
2477 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
2478 | { | |
2479 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
2480 | } | |
2481 | ||
2482 | /* | |
2483 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
2484 | * not be opened, and no I/O is attempted. | |
2485 | */ | |
2486 | int | |
2487 | vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) | |
2488 | { | |
2489 | vdev_t *vd, *tvd; | |
2490 | ||
2491 | spa_vdev_state_enter(spa, SCL_NONE); | |
2492 | ||
2493 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) | |
2494 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
2495 | ||
2496 | if (!vd->vdev_ops->vdev_op_leaf) | |
2497 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); | |
2498 | ||
2499 | tvd = vd->vdev_top; | |
2500 | ||
2501 | /* | |
2502 | * If user did a 'zpool offline -f' then make the fault persist across | |
2503 | * reboots. | |
2504 | */ | |
2505 | if (aux == VDEV_AUX_EXTERNAL_PERSIST) { | |
2506 | /* | |
2507 | * There are two kinds of forced faults: temporary and | |
2508 | * persistent. Temporary faults go away at pool import, while | |
2509 | * persistent faults stay set. Both types of faults can be | |
2510 | * cleared with a zpool clear. | |
2511 | * | |
2512 | * We tell if a vdev is persistently faulted by looking at the | |
2513 | * ZPOOL_CONFIG_AUX_STATE nvpair. If it's set to "external" at | |
2514 | * import then it's a persistent fault. Otherwise, it's | |
2515 | * temporary. We get ZPOOL_CONFIG_AUX_STATE set to "external" | |
2516 | * by setting vd.vdev_stat.vs_aux to VDEV_AUX_EXTERNAL. This | |
2517 | * tells vdev_config_generate() (which gets run later) to set | |
2518 | * ZPOOL_CONFIG_AUX_STATE to "external" in the nvlist. | |
2519 | */ | |
2520 | vd->vdev_stat.vs_aux = VDEV_AUX_EXTERNAL; | |
2521 | vd->vdev_tmpoffline = B_FALSE; | |
2522 | aux = VDEV_AUX_EXTERNAL; | |
2523 | } else { | |
2524 | vd->vdev_tmpoffline = B_TRUE; | |
2525 | } | |
2526 | ||
2527 | /* | |
2528 | * We don't directly use the aux state here, but if we do a | |
2529 | * vdev_reopen(), we need this value to be present to remember why we | |
2530 | * were faulted. | |
2531 | */ | |
2532 | vd->vdev_label_aux = aux; | |
2533 | ||
2534 | /* | |
2535 | * Faulted state takes precedence over degraded. | |
2536 | */ | |
2537 | vd->vdev_delayed_close = B_FALSE; | |
2538 | vd->vdev_faulted = 1ULL; | |
2539 | vd->vdev_degraded = 0ULL; | |
2540 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); | |
2541 | ||
2542 | /* | |
2543 | * If this device has the only valid copy of the data, then | |
2544 | * back off and simply mark the vdev as degraded instead. | |
2545 | */ | |
2546 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { | |
2547 | vd->vdev_degraded = 1ULL; | |
2548 | vd->vdev_faulted = 0ULL; | |
2549 | ||
2550 | /* | |
2551 | * If we reopen the device and it's not dead, only then do we | |
2552 | * mark it degraded. | |
2553 | */ | |
2554 | vdev_reopen(tvd); | |
2555 | ||
2556 | if (vdev_readable(vd)) | |
2557 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); | |
2558 | } | |
2559 | ||
2560 | return (spa_vdev_state_exit(spa, vd, 0)); | |
2561 | } | |
2562 | ||
2563 | /* | |
2564 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
2565 | * user that something is wrong. The vdev continues to operate as normal as far | |
2566 | * as I/O is concerned. | |
2567 | */ | |
2568 | int | |
2569 | vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) | |
2570 | { | |
2571 | vdev_t *vd; | |
2572 | ||
2573 | spa_vdev_state_enter(spa, SCL_NONE); | |
2574 | ||
2575 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) | |
2576 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
2577 | ||
2578 | if (!vd->vdev_ops->vdev_op_leaf) | |
2579 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); | |
2580 | ||
2581 | /* | |
2582 | * If the vdev is already faulted, then don't do anything. | |
2583 | */ | |
2584 | if (vd->vdev_faulted || vd->vdev_degraded) | |
2585 | return (spa_vdev_state_exit(spa, NULL, 0)); | |
2586 | ||
2587 | vd->vdev_degraded = 1ULL; | |
2588 | if (!vdev_is_dead(vd)) | |
2589 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
2590 | aux); | |
2591 | ||
2592 | return (spa_vdev_state_exit(spa, vd, 0)); | |
2593 | } | |
2594 | ||
2595 | /* | |
2596 | * Online the given vdev. | |
2597 | * | |
2598 | * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached | |
2599 | * spare device should be detached when the device finishes resilvering. | |
2600 | * Second, the online should be treated like a 'test' online case, so no FMA | |
2601 | * events are generated if the device fails to open. | |
2602 | */ | |
2603 | int | |
2604 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) | |
2605 | { | |
2606 | vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; | |
2607 | boolean_t wasoffline; | |
2608 | vdev_state_t oldstate; | |
2609 | ||
2610 | spa_vdev_state_enter(spa, SCL_NONE); | |
2611 | ||
2612 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) | |
2613 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
2614 | ||
2615 | if (!vd->vdev_ops->vdev_op_leaf) | |
2616 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); | |
2617 | ||
2618 | wasoffline = (vd->vdev_offline || vd->vdev_tmpoffline); | |
2619 | oldstate = vd->vdev_state; | |
2620 | ||
2621 | tvd = vd->vdev_top; | |
2622 | vd->vdev_offline = B_FALSE; | |
2623 | vd->vdev_tmpoffline = B_FALSE; | |
2624 | vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); | |
2625 | vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); | |
2626 | ||
2627 | /* XXX - L2ARC 1.0 does not support expansion */ | |
2628 | if (!vd->vdev_aux) { | |
2629 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
2630 | pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); | |
2631 | } | |
2632 | ||
2633 | vdev_reopen(tvd); | |
2634 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; | |
2635 | ||
2636 | if (!vd->vdev_aux) { | |
2637 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
2638 | pvd->vdev_expanding = B_FALSE; | |
2639 | } | |
2640 | ||
2641 | if (newstate) | |
2642 | *newstate = vd->vdev_state; | |
2643 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
2644 | !vdev_is_dead(vd) && vd->vdev_parent && | |
2645 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
2646 | vd->vdev_parent->vdev_child[0] == vd) | |
2647 | vd->vdev_unspare = B_TRUE; | |
2648 | ||
2649 | if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { | |
2650 | ||
2651 | /* XXX - L2ARC 1.0 does not support expansion */ | |
2652 | if (vd->vdev_aux) | |
2653 | return (spa_vdev_state_exit(spa, vd, ENOTSUP)); | |
2654 | spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); | |
2655 | } | |
2656 | ||
2657 | if (wasoffline || | |
2658 | (oldstate < VDEV_STATE_DEGRADED && | |
2659 | vd->vdev_state >= VDEV_STATE_DEGRADED)) | |
2660 | spa_event_notify(spa, vd, ESC_ZFS_VDEV_ONLINE); | |
2661 | ||
2662 | return (spa_vdev_state_exit(spa, vd, 0)); | |
2663 | } | |
2664 | ||
2665 | static int | |
2666 | vdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) | |
2667 | { | |
2668 | vdev_t *vd, *tvd; | |
2669 | int error = 0; | |
2670 | uint64_t generation; | |
2671 | metaslab_group_t *mg; | |
2672 | ||
2673 | top: | |
2674 | spa_vdev_state_enter(spa, SCL_ALLOC); | |
2675 | ||
2676 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) | |
2677 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
2678 | ||
2679 | if (!vd->vdev_ops->vdev_op_leaf) | |
2680 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); | |
2681 | ||
2682 | tvd = vd->vdev_top; | |
2683 | mg = tvd->vdev_mg; | |
2684 | generation = spa->spa_config_generation + 1; | |
2685 | ||
2686 | /* | |
2687 | * If the device isn't already offline, try to offline it. | |
2688 | */ | |
2689 | if (!vd->vdev_offline) { | |
2690 | /* | |
2691 | * If this device has the only valid copy of some data, | |
2692 | * don't allow it to be offlined. Log devices are always | |
2693 | * expendable. | |
2694 | */ | |
2695 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && | |
2696 | vdev_dtl_required(vd)) | |
2697 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); | |
2698 | ||
2699 | /* | |
2700 | * If the top-level is a slog and it has had allocations | |
2701 | * then proceed. We check that the vdev's metaslab group | |
2702 | * is not NULL since it's possible that we may have just | |
2703 | * added this vdev but not yet initialized its metaslabs. | |
2704 | */ | |
2705 | if (tvd->vdev_islog && mg != NULL) { | |
2706 | /* | |
2707 | * Prevent any future allocations. | |
2708 | */ | |
2709 | metaslab_group_passivate(mg); | |
2710 | (void) spa_vdev_state_exit(spa, vd, 0); | |
2711 | ||
2712 | error = spa_offline_log(spa); | |
2713 | ||
2714 | spa_vdev_state_enter(spa, SCL_ALLOC); | |
2715 | ||
2716 | /* | |
2717 | * Check to see if the config has changed. | |
2718 | */ | |
2719 | if (error || generation != spa->spa_config_generation) { | |
2720 | metaslab_group_activate(mg); | |
2721 | if (error) | |
2722 | return (spa_vdev_state_exit(spa, | |
2723 | vd, error)); | |
2724 | (void) spa_vdev_state_exit(spa, vd, 0); | |
2725 | goto top; | |
2726 | } | |
2727 | ASSERT0(tvd->vdev_stat.vs_alloc); | |
2728 | } | |
2729 | ||
2730 | /* | |
2731 | * Offline this device and reopen its top-level vdev. | |
2732 | * If the top-level vdev is a log device then just offline | |
2733 | * it. Otherwise, if this action results in the top-level | |
2734 | * vdev becoming unusable, undo it and fail the request. | |
2735 | */ | |
2736 | vd->vdev_offline = B_TRUE; | |
2737 | vdev_reopen(tvd); | |
2738 | ||
2739 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && | |
2740 | vdev_is_dead(tvd)) { | |
2741 | vd->vdev_offline = B_FALSE; | |
2742 | vdev_reopen(tvd); | |
2743 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); | |
2744 | } | |
2745 | ||
2746 | /* | |
2747 | * Add the device back into the metaslab rotor so that | |
2748 | * once we online the device it's open for business. | |
2749 | */ | |
2750 | if (tvd->vdev_islog && mg != NULL) | |
2751 | metaslab_group_activate(mg); | |
2752 | } | |
2753 | ||
2754 | vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); | |
2755 | ||
2756 | return (spa_vdev_state_exit(spa, vd, 0)); | |
2757 | } | |
2758 | ||
2759 | int | |
2760 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
2761 | { | |
2762 | int error; | |
2763 | ||
2764 | mutex_enter(&spa->spa_vdev_top_lock); | |
2765 | error = vdev_offline_locked(spa, guid, flags); | |
2766 | mutex_exit(&spa->spa_vdev_top_lock); | |
2767 | ||
2768 | return (error); | |
2769 | } | |
2770 | ||
2771 | /* | |
2772 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
2773 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
2774 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
2775 | */ | |
2776 | void | |
2777 | vdev_clear(spa_t *spa, vdev_t *vd) | |
2778 | { | |
2779 | vdev_t *rvd = spa->spa_root_vdev; | |
2780 | int c; | |
2781 | ||
2782 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
2783 | ||
2784 | if (vd == NULL) | |
2785 | vd = rvd; | |
2786 | ||
2787 | vd->vdev_stat.vs_read_errors = 0; | |
2788 | vd->vdev_stat.vs_write_errors = 0; | |
2789 | vd->vdev_stat.vs_checksum_errors = 0; | |
2790 | ||
2791 | for (c = 0; c < vd->vdev_children; c++) | |
2792 | vdev_clear(spa, vd->vdev_child[c]); | |
2793 | ||
2794 | /* | |
2795 | * If we're in the FAULTED state or have experienced failed I/O, then | |
2796 | * clear the persistent state and attempt to reopen the device. We | |
2797 | * also mark the vdev config dirty, so that the new faulted state is | |
2798 | * written out to disk. | |
2799 | */ | |
2800 | if (vd->vdev_faulted || vd->vdev_degraded || | |
2801 | !vdev_readable(vd) || !vdev_writeable(vd)) { | |
2802 | /* | |
2803 | * When reopening in response to a clear event, it may be due to | |
2804 | * a fmadm repair request. In this case, if the device is | |
2805 | * still broken, we want to still post the ereport again. | |
2806 | */ | |
2807 | vd->vdev_forcefault = B_TRUE; | |
2808 | ||
2809 | vd->vdev_faulted = vd->vdev_degraded = 0ULL; | |
2810 | vd->vdev_cant_read = B_FALSE; | |
2811 | vd->vdev_cant_write = B_FALSE; | |
2812 | vd->vdev_stat.vs_aux = 0; | |
2813 | ||
2814 | vdev_reopen(vd == rvd ? rvd : vd->vdev_top); | |
2815 | ||
2816 | vd->vdev_forcefault = B_FALSE; | |
2817 | ||
2818 | if (vd != rvd && vdev_writeable(vd->vdev_top)) | |
2819 | vdev_state_dirty(vd->vdev_top); | |
2820 | ||
2821 | if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) | |
2822 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
2823 | ||
2824 | spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); | |
2825 | } | |
2826 | ||
2827 | /* | |
2828 | * When clearing a FMA-diagnosed fault, we always want to | |
2829 | * unspare the device, as we assume that the original spare was | |
2830 | * done in response to the FMA fault. | |
2831 | */ | |
2832 | if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && | |
2833 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
2834 | vd->vdev_parent->vdev_child[0] == vd) | |
2835 | vd->vdev_unspare = B_TRUE; | |
2836 | } | |
2837 | ||
2838 | boolean_t | |
2839 | vdev_is_dead(vdev_t *vd) | |
2840 | { | |
2841 | /* | |
2842 | * Holes and missing devices are always considered "dead". | |
2843 | * This simplifies the code since we don't have to check for | |
2844 | * these types of devices in the various code paths. | |
2845 | * Instead we rely on the fact that we skip over dead devices | |
2846 | * before issuing I/O to them. | |
2847 | */ | |
2848 | return (vd->vdev_state < VDEV_STATE_DEGRADED || vd->vdev_ishole || | |
2849 | vd->vdev_ops == &vdev_missing_ops); | |
2850 | } | |
2851 | ||
2852 | boolean_t | |
2853 | vdev_readable(vdev_t *vd) | |
2854 | { | |
2855 | return (!vdev_is_dead(vd) && !vd->vdev_cant_read); | |
2856 | } | |
2857 | ||
2858 | boolean_t | |
2859 | vdev_writeable(vdev_t *vd) | |
2860 | { | |
2861 | return (!vdev_is_dead(vd) && !vd->vdev_cant_write); | |
2862 | } | |
2863 | ||
2864 | boolean_t | |
2865 | vdev_allocatable(vdev_t *vd) | |
2866 | { | |
2867 | uint64_t state = vd->vdev_state; | |
2868 | ||
2869 | /* | |
2870 | * We currently allow allocations from vdevs which may be in the | |
2871 | * process of reopening (i.e. VDEV_STATE_CLOSED). If the device | |
2872 | * fails to reopen then we'll catch it later when we're holding | |
2873 | * the proper locks. Note that we have to get the vdev state | |
2874 | * in a local variable because although it changes atomically, | |
2875 | * we're asking two separate questions about it. | |
2876 | */ | |
2877 | return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && | |
2878 | !vd->vdev_cant_write && !vd->vdev_ishole && | |
2879 | vd->vdev_mg->mg_initialized); | |
2880 | } | |
2881 | ||
2882 | boolean_t | |
2883 | vdev_accessible(vdev_t *vd, zio_t *zio) | |
2884 | { | |
2885 | ASSERT(zio->io_vd == vd); | |
2886 | ||
2887 | if (vdev_is_dead(vd) || vd->vdev_remove_wanted) | |
2888 | return (B_FALSE); | |
2889 | ||
2890 | if (zio->io_type == ZIO_TYPE_READ) | |
2891 | return (!vd->vdev_cant_read); | |
2892 | ||
2893 | if (zio->io_type == ZIO_TYPE_WRITE) | |
2894 | return (!vd->vdev_cant_write); | |
2895 | ||
2896 | return (B_TRUE); | |
2897 | } | |
2898 | ||
2899 | static void | |
2900 | vdev_get_child_stat(vdev_t *cvd, vdev_stat_t *vs, vdev_stat_t *cvs) | |
2901 | { | |
2902 | int t; | |
2903 | for (t = 0; t < ZIO_TYPES; t++) { | |
2904 | vs->vs_ops[t] += cvs->vs_ops[t]; | |
2905 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
2906 | } | |
2907 | ||
2908 | cvs->vs_scan_removing = cvd->vdev_removing; | |
2909 | } | |
2910 | ||
2911 | /* | |
2912 | * Get extended stats | |
2913 | */ | |
2914 | static void | |
2915 | vdev_get_child_stat_ex(vdev_t *cvd, vdev_stat_ex_t *vsx, vdev_stat_ex_t *cvsx) | |
2916 | { | |
2917 | int t, b; | |
2918 | for (t = 0; t < ZIO_TYPES; t++) { | |
2919 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_disk_histo[0]); b++) | |
2920 | vsx->vsx_disk_histo[t][b] += cvsx->vsx_disk_histo[t][b]; | |
2921 | ||
2922 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_total_histo[0]); b++) { | |
2923 | vsx->vsx_total_histo[t][b] += | |
2924 | cvsx->vsx_total_histo[t][b]; | |
2925 | } | |
2926 | } | |
2927 | ||
2928 | for (t = 0; t < ZIO_PRIORITY_NUM_QUEUEABLE; t++) { | |
2929 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_queue_histo[0]); b++) { | |
2930 | vsx->vsx_queue_histo[t][b] += | |
2931 | cvsx->vsx_queue_histo[t][b]; | |
2932 | } | |
2933 | vsx->vsx_active_queue[t] += cvsx->vsx_active_queue[t]; | |
2934 | vsx->vsx_pend_queue[t] += cvsx->vsx_pend_queue[t]; | |
2935 | ||
2936 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_ind_histo[0]); b++) | |
2937 | vsx->vsx_ind_histo[t][b] += cvsx->vsx_ind_histo[t][b]; | |
2938 | ||
2939 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_agg_histo[0]); b++) | |
2940 | vsx->vsx_agg_histo[t][b] += cvsx->vsx_agg_histo[t][b]; | |
2941 | } | |
2942 | ||
2943 | } | |
2944 | ||
2945 | /* | |
2946 | * Get statistics for the given vdev. | |
2947 | */ | |
2948 | static void | |
2949 | vdev_get_stats_ex_impl(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx) | |
2950 | { | |
2951 | int c, t; | |
2952 | /* | |
2953 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
2954 | * over all top-level vdevs (i.e. the direct children of the root). | |
2955 | */ | |
2956 | if (!vd->vdev_ops->vdev_op_leaf) { | |
2957 | if (vs) { | |
2958 | memset(vs->vs_ops, 0, sizeof (vs->vs_ops)); | |
2959 | memset(vs->vs_bytes, 0, sizeof (vs->vs_bytes)); | |
2960 | } | |
2961 | if (vsx) | |
2962 | memset(vsx, 0, sizeof (*vsx)); | |
2963 | ||
2964 | for (c = 0; c < vd->vdev_children; c++) { | |
2965 | vdev_t *cvd = vd->vdev_child[c]; | |
2966 | vdev_stat_t *cvs = &cvd->vdev_stat; | |
2967 | vdev_stat_ex_t *cvsx = &cvd->vdev_stat_ex; | |
2968 | ||
2969 | vdev_get_stats_ex_impl(cvd, cvs, cvsx); | |
2970 | if (vs) | |
2971 | vdev_get_child_stat(cvd, vs, cvs); | |
2972 | if (vsx) | |
2973 | vdev_get_child_stat_ex(cvd, vsx, cvsx); | |
2974 | ||
2975 | } | |
2976 | } else { | |
2977 | /* | |
2978 | * We're a leaf. Just copy our ZIO active queue stats in. The | |
2979 | * other leaf stats are updated in vdev_stat_update(). | |
2980 | */ | |
2981 | if (!vsx) | |
2982 | return; | |
2983 | ||
2984 | memcpy(vsx, &vd->vdev_stat_ex, sizeof (vd->vdev_stat_ex)); | |
2985 | ||
2986 | for (t = 0; t < ARRAY_SIZE(vd->vdev_queue.vq_class); t++) { | |
2987 | vsx->vsx_active_queue[t] = | |
2988 | vd->vdev_queue.vq_class[t].vqc_active; | |
2989 | vsx->vsx_pend_queue[t] = avl_numnodes( | |
2990 | &vd->vdev_queue.vq_class[t].vqc_queued_tree); | |
2991 | } | |
2992 | } | |
2993 | } | |
2994 | ||
2995 | void | |
2996 | vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx) | |
2997 | { | |
2998 | vdev_t *tvd = vd->vdev_top; | |
2999 | mutex_enter(&vd->vdev_stat_lock); | |
3000 | if (vs) { | |
3001 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
3002 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; | |
3003 | vs->vs_state = vd->vdev_state; | |
3004 | vs->vs_rsize = vdev_get_min_asize(vd); | |
3005 | if (vd->vdev_ops->vdev_op_leaf) | |
3006 | vs->vs_rsize += VDEV_LABEL_START_SIZE + | |
3007 | VDEV_LABEL_END_SIZE; | |
3008 | /* | |
3009 | * Report expandable space on top-level, non-auxillary devices | |
3010 | * only. The expandable space is reported in terms of metaslab | |
3011 | * sized units since that determines how much space the pool | |
3012 | * can expand. | |
3013 | */ | |
3014 | if (vd->vdev_aux == NULL && tvd != NULL) { | |
3015 | vs->vs_esize = P2ALIGN( | |
3016 | vd->vdev_max_asize - vd->vdev_asize, | |
3017 | 1ULL << tvd->vdev_ms_shift); | |
3018 | } | |
3019 | vs->vs_esize = vd->vdev_max_asize - vd->vdev_asize; | |
3020 | if (vd->vdev_aux == NULL && vd == vd->vdev_top && | |
3021 | !vd->vdev_ishole) { | |
3022 | vs->vs_fragmentation = vd->vdev_mg->mg_fragmentation; | |
3023 | } | |
3024 | } | |
3025 | ||
3026 | ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_READER) != 0); | |
3027 | vdev_get_stats_ex_impl(vd, vs, vsx); | |
3028 | mutex_exit(&vd->vdev_stat_lock); | |
3029 | } | |
3030 | ||
3031 | void | |
3032 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
3033 | { | |
3034 | return (vdev_get_stats_ex(vd, vs, NULL)); | |
3035 | } | |
3036 | ||
3037 | void | |
3038 | vdev_clear_stats(vdev_t *vd) | |
3039 | { | |
3040 | mutex_enter(&vd->vdev_stat_lock); | |
3041 | vd->vdev_stat.vs_space = 0; | |
3042 | vd->vdev_stat.vs_dspace = 0; | |
3043 | vd->vdev_stat.vs_alloc = 0; | |
3044 | mutex_exit(&vd->vdev_stat_lock); | |
3045 | } | |
3046 | ||
3047 | void | |
3048 | vdev_scan_stat_init(vdev_t *vd) | |
3049 | { | |
3050 | vdev_stat_t *vs = &vd->vdev_stat; | |
3051 | int c; | |
3052 | ||
3053 | for (c = 0; c < vd->vdev_children; c++) | |
3054 | vdev_scan_stat_init(vd->vdev_child[c]); | |
3055 | ||
3056 | mutex_enter(&vd->vdev_stat_lock); | |
3057 | vs->vs_scan_processed = 0; | |
3058 | mutex_exit(&vd->vdev_stat_lock); | |
3059 | } | |
3060 | ||
3061 | void | |
3062 | vdev_stat_update(zio_t *zio, uint64_t psize) | |
3063 | { | |
3064 | spa_t *spa = zio->io_spa; | |
3065 | vdev_t *rvd = spa->spa_root_vdev; | |
3066 | vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; | |
3067 | vdev_t *pvd; | |
3068 | uint64_t txg = zio->io_txg; | |
3069 | vdev_stat_t *vs = &vd->vdev_stat; | |
3070 | vdev_stat_ex_t *vsx = &vd->vdev_stat_ex; | |
3071 | zio_type_t type = zio->io_type; | |
3072 | int flags = zio->io_flags; | |
3073 | ||
3074 | /* | |
3075 | * If this i/o is a gang leader, it didn't do any actual work. | |
3076 | */ | |
3077 | if (zio->io_gang_tree) | |
3078 | return; | |
3079 | ||
3080 | if (zio->io_error == 0) { | |
3081 | /* | |
3082 | * If this is a root i/o, don't count it -- we've already | |
3083 | * counted the top-level vdevs, and vdev_get_stats() will | |
3084 | * aggregate them when asked. This reduces contention on | |
3085 | * the root vdev_stat_lock and implicitly handles blocks | |
3086 | * that compress away to holes, for which there is no i/o. | |
3087 | * (Holes never create vdev children, so all the counters | |
3088 | * remain zero, which is what we want.) | |
3089 | * | |
3090 | * Note: this only applies to successful i/o (io_error == 0) | |
3091 | * because unlike i/o counts, errors are not additive. | |
3092 | * When reading a ditto block, for example, failure of | |
3093 | * one top-level vdev does not imply a root-level error. | |
3094 | */ | |
3095 | if (vd == rvd) | |
3096 | return; | |
3097 | ||
3098 | ASSERT(vd == zio->io_vd); | |
3099 | ||
3100 | if (flags & ZIO_FLAG_IO_BYPASS) | |
3101 | return; | |
3102 | ||
3103 | mutex_enter(&vd->vdev_stat_lock); | |
3104 | ||
3105 | if (flags & ZIO_FLAG_IO_REPAIR) { | |
3106 | if (flags & ZIO_FLAG_SCAN_THREAD) { | |
3107 | dsl_scan_phys_t *scn_phys = | |
3108 | &spa->spa_dsl_pool->dp_scan->scn_phys; | |
3109 | uint64_t *processed = &scn_phys->scn_processed; | |
3110 | ||
3111 | /* XXX cleanup? */ | |
3112 | if (vd->vdev_ops->vdev_op_leaf) | |
3113 | atomic_add_64(processed, psize); | |
3114 | vs->vs_scan_processed += psize; | |
3115 | } | |
3116 | ||
3117 | if (flags & ZIO_FLAG_SELF_HEAL) | |
3118 | vs->vs_self_healed += psize; | |
3119 | } | |
3120 | ||
3121 | /* | |
3122 | * The bytes/ops/histograms are recorded at the leaf level and | |
3123 | * aggregated into the higher level vdevs in vdev_get_stats(). | |
3124 | */ | |
3125 | if (vd->vdev_ops->vdev_op_leaf && | |
3126 | (zio->io_priority < ZIO_PRIORITY_NUM_QUEUEABLE)) { | |
3127 | ||
3128 | vs->vs_ops[type]++; | |
3129 | vs->vs_bytes[type] += psize; | |
3130 | ||
3131 | if (flags & ZIO_FLAG_DELEGATED) { | |
3132 | vsx->vsx_agg_histo[zio->io_priority] | |
3133 | [RQ_HISTO(zio->io_size)]++; | |
3134 | } else { | |
3135 | vsx->vsx_ind_histo[zio->io_priority] | |
3136 | [RQ_HISTO(zio->io_size)]++; | |
3137 | } | |
3138 | ||
3139 | if (zio->io_delta && zio->io_delay) { | |
3140 | vsx->vsx_queue_histo[zio->io_priority] | |
3141 | [L_HISTO(zio->io_delta - zio->io_delay)]++; | |
3142 | vsx->vsx_disk_histo[type] | |
3143 | [L_HISTO(zio->io_delay)]++; | |
3144 | vsx->vsx_total_histo[type] | |
3145 | [L_HISTO(zio->io_delta)]++; | |
3146 | } | |
3147 | } | |
3148 | ||
3149 | mutex_exit(&vd->vdev_stat_lock); | |
3150 | return; | |
3151 | } | |
3152 | ||
3153 | if (flags & ZIO_FLAG_SPECULATIVE) | |
3154 | return; | |
3155 | ||
3156 | /* | |
3157 | * If this is an I/O error that is going to be retried, then ignore the | |
3158 | * error. Otherwise, the user may interpret B_FAILFAST I/O errors as | |
3159 | * hard errors, when in reality they can happen for any number of | |
3160 | * innocuous reasons (bus resets, MPxIO link failure, etc). | |
3161 | */ | |
3162 | if (zio->io_error == EIO && | |
3163 | !(zio->io_flags & ZIO_FLAG_IO_RETRY)) | |
3164 | return; | |
3165 | ||
3166 | /* | |
3167 | * Intent logs writes won't propagate their error to the root | |
3168 | * I/O so don't mark these types of failures as pool-level | |
3169 | * errors. | |
3170 | */ | |
3171 | if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) | |
3172 | return; | |
3173 | ||
3174 | mutex_enter(&vd->vdev_stat_lock); | |
3175 | if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { | |
3176 | if (zio->io_error == ECKSUM) | |
3177 | vs->vs_checksum_errors++; | |
3178 | else | |
3179 | vs->vs_read_errors++; | |
3180 | } | |
3181 | if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) | |
3182 | vs->vs_write_errors++; | |
3183 | mutex_exit(&vd->vdev_stat_lock); | |
3184 | ||
3185 | if (type == ZIO_TYPE_WRITE && txg != 0 && | |
3186 | (!(flags & ZIO_FLAG_IO_REPAIR) || | |
3187 | (flags & ZIO_FLAG_SCAN_THREAD) || | |
3188 | spa->spa_claiming)) { | |
3189 | /* | |
3190 | * This is either a normal write (not a repair), or it's | |
3191 | * a repair induced by the scrub thread, or it's a repair | |
3192 | * made by zil_claim() during spa_load() in the first txg. | |
3193 | * In the normal case, we commit the DTL change in the same | |
3194 | * txg as the block was born. In the scrub-induced repair | |
3195 | * case, we know that scrubs run in first-pass syncing context, | |
3196 | * so we commit the DTL change in spa_syncing_txg(spa). | |
3197 | * In the zil_claim() case, we commit in spa_first_txg(spa). | |
3198 | * | |
3199 | * We currently do not make DTL entries for failed spontaneous | |
3200 | * self-healing writes triggered by normal (non-scrubbing) | |
3201 | * reads, because we have no transactional context in which to | |
3202 | * do so -- and it's not clear that it'd be desirable anyway. | |
3203 | */ | |
3204 | if (vd->vdev_ops->vdev_op_leaf) { | |
3205 | uint64_t commit_txg = txg; | |
3206 | if (flags & ZIO_FLAG_SCAN_THREAD) { | |
3207 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
3208 | ASSERT(spa_sync_pass(spa) == 1); | |
3209 | vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); | |
3210 | commit_txg = spa_syncing_txg(spa); | |
3211 | } else if (spa->spa_claiming) { | |
3212 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
3213 | commit_txg = spa_first_txg(spa); | |
3214 | } | |
3215 | ASSERT(commit_txg >= spa_syncing_txg(spa)); | |
3216 | if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) | |
3217 | return; | |
3218 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
3219 | vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); | |
3220 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); | |
3221 | } | |
3222 | if (vd != rvd) | |
3223 | vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); | |
3224 | } | |
3225 | } | |
3226 | ||
3227 | /* | |
3228 | * Update the in-core space usage stats for this vdev, its metaslab class, | |
3229 | * and the root vdev. | |
3230 | */ | |
3231 | void | |
3232 | vdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, | |
3233 | int64_t space_delta) | |
3234 | { | |
3235 | int64_t dspace_delta = space_delta; | |
3236 | spa_t *spa = vd->vdev_spa; | |
3237 | vdev_t *rvd = spa->spa_root_vdev; | |
3238 | metaslab_group_t *mg = vd->vdev_mg; | |
3239 | metaslab_class_t *mc = mg ? mg->mg_class : NULL; | |
3240 | ||
3241 | ASSERT(vd == vd->vdev_top); | |
3242 | ||
3243 | /* | |
3244 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
3245 | * factor. We must calculate this here and not at the root vdev | |
3246 | * because the root vdev's psize-to-asize is simply the max of its | |
3247 | * childrens', thus not accurate enough for us. | |
3248 | */ | |
3249 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
3250 | ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); | |
3251 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * | |
3252 | vd->vdev_deflate_ratio; | |
3253 | ||
3254 | mutex_enter(&vd->vdev_stat_lock); | |
3255 | vd->vdev_stat.vs_alloc += alloc_delta; | |
3256 | vd->vdev_stat.vs_space += space_delta; | |
3257 | vd->vdev_stat.vs_dspace += dspace_delta; | |
3258 | mutex_exit(&vd->vdev_stat_lock); | |
3259 | ||
3260 | if (mc == spa_normal_class(spa)) { | |
3261 | mutex_enter(&rvd->vdev_stat_lock); | |
3262 | rvd->vdev_stat.vs_alloc += alloc_delta; | |
3263 | rvd->vdev_stat.vs_space += space_delta; | |
3264 | rvd->vdev_stat.vs_dspace += dspace_delta; | |
3265 | mutex_exit(&rvd->vdev_stat_lock); | |
3266 | } | |
3267 | ||
3268 | if (mc != NULL) { | |
3269 | ASSERT(rvd == vd->vdev_parent); | |
3270 | ASSERT(vd->vdev_ms_count != 0); | |
3271 | ||
3272 | metaslab_class_space_update(mc, | |
3273 | alloc_delta, defer_delta, space_delta, dspace_delta); | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | /* | |
3278 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
3279 | * so that it will be written out next time the vdev configuration is synced. | |
3280 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
3281 | */ | |
3282 | void | |
3283 | vdev_config_dirty(vdev_t *vd) | |
3284 | { | |
3285 | spa_t *spa = vd->vdev_spa; | |
3286 | vdev_t *rvd = spa->spa_root_vdev; | |
3287 | int c; | |
3288 | ||
3289 | ASSERT(spa_writeable(spa)); | |
3290 | ||
3291 | /* | |
3292 | * If this is an aux vdev (as with l2cache and spare devices), then we | |
3293 | * update the vdev config manually and set the sync flag. | |
3294 | */ | |
3295 | if (vd->vdev_aux != NULL) { | |
3296 | spa_aux_vdev_t *sav = vd->vdev_aux; | |
3297 | nvlist_t **aux; | |
3298 | uint_t naux; | |
3299 | ||
3300 | for (c = 0; c < sav->sav_count; c++) { | |
3301 | if (sav->sav_vdevs[c] == vd) | |
3302 | break; | |
3303 | } | |
3304 | ||
3305 | if (c == sav->sav_count) { | |
3306 | /* | |
3307 | * We're being removed. There's nothing more to do. | |
3308 | */ | |
3309 | ASSERT(sav->sav_sync == B_TRUE); | |
3310 | return; | |
3311 | } | |
3312 | ||
3313 | sav->sav_sync = B_TRUE; | |
3314 | ||
3315 | if (nvlist_lookup_nvlist_array(sav->sav_config, | |
3316 | ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { | |
3317 | VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, | |
3318 | ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); | |
3319 | } | |
3320 | ||
3321 | ASSERT(c < naux); | |
3322 | ||
3323 | /* | |
3324 | * Setting the nvlist in the middle if the array is a little | |
3325 | * sketchy, but it will work. | |
3326 | */ | |
3327 | nvlist_free(aux[c]); | |
3328 | aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); | |
3329 | ||
3330 | return; | |
3331 | } | |
3332 | ||
3333 | /* | |
3334 | * The dirty list is protected by the SCL_CONFIG lock. The caller | |
3335 | * must either hold SCL_CONFIG as writer, or must be the sync thread | |
3336 | * (which holds SCL_CONFIG as reader). There's only one sync thread, | |
3337 | * so this is sufficient to ensure mutual exclusion. | |
3338 | */ | |
3339 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || | |
3340 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
3341 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
3342 | ||
3343 | if (vd == rvd) { | |
3344 | for (c = 0; c < rvd->vdev_children; c++) | |
3345 | vdev_config_dirty(rvd->vdev_child[c]); | |
3346 | } else { | |
3347 | ASSERT(vd == vd->vdev_top); | |
3348 | ||
3349 | if (!list_link_active(&vd->vdev_config_dirty_node) && | |
3350 | !vd->vdev_ishole) | |
3351 | list_insert_head(&spa->spa_config_dirty_list, vd); | |
3352 | } | |
3353 | } | |
3354 | ||
3355 | void | |
3356 | vdev_config_clean(vdev_t *vd) | |
3357 | { | |
3358 | spa_t *spa = vd->vdev_spa; | |
3359 | ||
3360 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || | |
3361 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
3362 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
3363 | ||
3364 | ASSERT(list_link_active(&vd->vdev_config_dirty_node)); | |
3365 | list_remove(&spa->spa_config_dirty_list, vd); | |
3366 | } | |
3367 | ||
3368 | /* | |
3369 | * Mark a top-level vdev's state as dirty, so that the next pass of | |
3370 | * spa_sync() can convert this into vdev_config_dirty(). We distinguish | |
3371 | * the state changes from larger config changes because they require | |
3372 | * much less locking, and are often needed for administrative actions. | |
3373 | */ | |
3374 | void | |
3375 | vdev_state_dirty(vdev_t *vd) | |
3376 | { | |
3377 | spa_t *spa = vd->vdev_spa; | |
3378 | ||
3379 | ASSERT(spa_writeable(spa)); | |
3380 | ASSERT(vd == vd->vdev_top); | |
3381 | ||
3382 | /* | |
3383 | * The state list is protected by the SCL_STATE lock. The caller | |
3384 | * must either hold SCL_STATE as writer, or must be the sync thread | |
3385 | * (which holds SCL_STATE as reader). There's only one sync thread, | |
3386 | * so this is sufficient to ensure mutual exclusion. | |
3387 | */ | |
3388 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
3389 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
3390 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
3391 | ||
3392 | if (!list_link_active(&vd->vdev_state_dirty_node) && !vd->vdev_ishole) | |
3393 | list_insert_head(&spa->spa_state_dirty_list, vd); | |
3394 | } | |
3395 | ||
3396 | void | |
3397 | vdev_state_clean(vdev_t *vd) | |
3398 | { | |
3399 | spa_t *spa = vd->vdev_spa; | |
3400 | ||
3401 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
3402 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
3403 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
3404 | ||
3405 | ASSERT(list_link_active(&vd->vdev_state_dirty_node)); | |
3406 | list_remove(&spa->spa_state_dirty_list, vd); | |
3407 | } | |
3408 | ||
3409 | /* | |
3410 | * Propagate vdev state up from children to parent. | |
3411 | */ | |
3412 | void | |
3413 | vdev_propagate_state(vdev_t *vd) | |
3414 | { | |
3415 | spa_t *spa = vd->vdev_spa; | |
3416 | vdev_t *rvd = spa->spa_root_vdev; | |
3417 | int degraded = 0, faulted = 0; | |
3418 | int corrupted = 0; | |
3419 | vdev_t *child; | |
3420 | int c; | |
3421 | ||
3422 | if (vd->vdev_children > 0) { | |
3423 | for (c = 0; c < vd->vdev_children; c++) { | |
3424 | child = vd->vdev_child[c]; | |
3425 | ||
3426 | /* | |
3427 | * Don't factor holes into the decision. | |
3428 | */ | |
3429 | if (child->vdev_ishole) | |
3430 | continue; | |
3431 | ||
3432 | if (!vdev_readable(child) || | |
3433 | (!vdev_writeable(child) && spa_writeable(spa))) { | |
3434 | /* | |
3435 | * Root special: if there is a top-level log | |
3436 | * device, treat the root vdev as if it were | |
3437 | * degraded. | |
3438 | */ | |
3439 | if (child->vdev_islog && vd == rvd) | |
3440 | degraded++; | |
3441 | else | |
3442 | faulted++; | |
3443 | } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { | |
3444 | degraded++; | |
3445 | } | |
3446 | ||
3447 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
3448 | corrupted++; | |
3449 | } | |
3450 | ||
3451 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
3452 | ||
3453 | /* | |
3454 | * Root special: if there is a top-level vdev that cannot be | |
3455 | * opened due to corrupted metadata, then propagate the root | |
3456 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
3457 | * replicas'. | |
3458 | */ | |
3459 | if (corrupted && vd == rvd && | |
3460 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
3461 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
3462 | VDEV_AUX_CORRUPT_DATA); | |
3463 | } | |
3464 | ||
3465 | if (vd->vdev_parent) | |
3466 | vdev_propagate_state(vd->vdev_parent); | |
3467 | } | |
3468 | ||
3469 | /* | |
3470 | * Set a vdev's state. If this is during an open, we don't update the parent | |
3471 | * state, because we're in the process of opening children depth-first. | |
3472 | * Otherwise, we propagate the change to the parent. | |
3473 | * | |
3474 | * If this routine places a device in a faulted state, an appropriate ereport is | |
3475 | * generated. | |
3476 | */ | |
3477 | void | |
3478 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
3479 | { | |
3480 | uint64_t save_state; | |
3481 | spa_t *spa = vd->vdev_spa; | |
3482 | ||
3483 | if (state == vd->vdev_state) { | |
3484 | /* | |
3485 | * Since vdev_offline() code path is already in an offline | |
3486 | * state we can miss a statechange event to OFFLINE. Check | |
3487 | * the previous state to catch this condition. | |
3488 | */ | |
3489 | if (vd->vdev_ops->vdev_op_leaf && | |
3490 | (state == VDEV_STATE_OFFLINE) && | |
3491 | (vd->vdev_prevstate >= VDEV_STATE_FAULTED)) { | |
3492 | /* post an offline state change */ | |
3493 | zfs_post_state_change(spa, vd, vd->vdev_prevstate); | |
3494 | } | |
3495 | vd->vdev_stat.vs_aux = aux; | |
3496 | return; | |
3497 | } | |
3498 | ||
3499 | save_state = vd->vdev_state; | |
3500 | ||
3501 | vd->vdev_state = state; | |
3502 | vd->vdev_stat.vs_aux = aux; | |
3503 | ||
3504 | /* | |
3505 | * If we are setting the vdev state to anything but an open state, then | |
3506 | * always close the underlying device unless the device has requested | |
3507 | * a delayed close (i.e. we're about to remove or fault the device). | |
3508 | * Otherwise, we keep accessible but invalid devices open forever. | |
3509 | * We don't call vdev_close() itself, because that implies some extra | |
3510 | * checks (offline, etc) that we don't want here. This is limited to | |
3511 | * leaf devices, because otherwise closing the device will affect other | |
3512 | * children. | |
3513 | */ | |
3514 | if (!vd->vdev_delayed_close && vdev_is_dead(vd) && | |
3515 | vd->vdev_ops->vdev_op_leaf) | |
3516 | vd->vdev_ops->vdev_op_close(vd); | |
3517 | ||
3518 | if (vd->vdev_removed && | |
3519 | state == VDEV_STATE_CANT_OPEN && | |
3520 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
3521 | /* | |
3522 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
3523 | * device was previously marked removed and someone attempted to | |
3524 | * reopen it. If this failed due to a nonexistent device, then | |
3525 | * keep the device in the REMOVED state. We also let this be if | |
3526 | * it is one of our special test online cases, which is only | |
3527 | * attempting to online the device and shouldn't generate an FMA | |
3528 | * fault. | |
3529 | */ | |
3530 | vd->vdev_state = VDEV_STATE_REMOVED; | |
3531 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
3532 | } else if (state == VDEV_STATE_REMOVED) { | |
3533 | vd->vdev_removed = B_TRUE; | |
3534 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
3535 | /* | |
3536 | * If we fail to open a vdev during an import or recovery, we | |
3537 | * mark it as "not available", which signifies that it was | |
3538 | * never there to begin with. Failure to open such a device | |
3539 | * is not considered an error. | |
3540 | */ | |
3541 | if ((spa_load_state(spa) == SPA_LOAD_IMPORT || | |
3542 | spa_load_state(spa) == SPA_LOAD_RECOVER) && | |
3543 | vd->vdev_ops->vdev_op_leaf) | |
3544 | vd->vdev_not_present = 1; | |
3545 | ||
3546 | /* | |
3547 | * Post the appropriate ereport. If the 'prevstate' field is | |
3548 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
3549 | * that this is part of a vdev_reopen(). In this case, we don't | |
3550 | * want to post the ereport if the device was already in the | |
3551 | * CANT_OPEN state beforehand. | |
3552 | * | |
3553 | * If the 'checkremove' flag is set, then this is an attempt to | |
3554 | * online the device in response to an insertion event. If we | |
3555 | * hit this case, then we have detected an insertion event for a | |
3556 | * faulted or offline device that wasn't in the removed state. | |
3557 | * In this scenario, we don't post an ereport because we are | |
3558 | * about to replace the device, or attempt an online with | |
3559 | * vdev_forcefault, which will generate the fault for us. | |
3560 | */ | |
3561 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
3562 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
3563 | vd != spa->spa_root_vdev) { | |
3564 | const char *class; | |
3565 | ||
3566 | switch (aux) { | |
3567 | case VDEV_AUX_OPEN_FAILED: | |
3568 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
3569 | break; | |
3570 | case VDEV_AUX_CORRUPT_DATA: | |
3571 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
3572 | break; | |
3573 | case VDEV_AUX_NO_REPLICAS: | |
3574 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
3575 | break; | |
3576 | case VDEV_AUX_BAD_GUID_SUM: | |
3577 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
3578 | break; | |
3579 | case VDEV_AUX_TOO_SMALL: | |
3580 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
3581 | break; | |
3582 | case VDEV_AUX_BAD_LABEL: | |
3583 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
3584 | break; | |
3585 | case VDEV_AUX_BAD_ASHIFT: | |
3586 | class = FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT; | |
3587 | break; | |
3588 | default: | |
3589 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
3590 | } | |
3591 | ||
3592 | zfs_ereport_post(class, spa, vd, NULL, save_state, 0); | |
3593 | } | |
3594 | ||
3595 | /* Erase any notion of persistent removed state */ | |
3596 | vd->vdev_removed = B_FALSE; | |
3597 | } else { | |
3598 | vd->vdev_removed = B_FALSE; | |
3599 | } | |
3600 | ||
3601 | /* | |
3602 | * Notify ZED of any significant state-change on a leaf vdev. | |
3603 | * | |
3604 | */ | |
3605 | if (vd->vdev_ops->vdev_op_leaf) { | |
3606 | /* preserve original state from a vdev_reopen() */ | |
3607 | if ((vd->vdev_prevstate != VDEV_STATE_UNKNOWN) && | |
3608 | (vd->vdev_prevstate != vd->vdev_state) && | |
3609 | (save_state <= VDEV_STATE_CLOSED)) | |
3610 | save_state = vd->vdev_prevstate; | |
3611 | ||
3612 | /* filter out state change due to initial vdev_open */ | |
3613 | if (save_state > VDEV_STATE_CLOSED) | |
3614 | zfs_post_state_change(spa, vd, save_state); | |
3615 | } | |
3616 | ||
3617 | if (!isopen && vd->vdev_parent) | |
3618 | vdev_propagate_state(vd->vdev_parent); | |
3619 | } | |
3620 | ||
3621 | /* | |
3622 | * Check the vdev configuration to ensure that it's capable of supporting | |
3623 | * a root pool. We do not support partial configuration. | |
3624 | */ | |
3625 | boolean_t | |
3626 | vdev_is_bootable(vdev_t *vd) | |
3627 | { | |
3628 | if (!vd->vdev_ops->vdev_op_leaf) { | |
3629 | const char *vdev_type = vd->vdev_ops->vdev_op_type; | |
3630 | ||
3631 | if (strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) | |
3632 | return (B_FALSE); | |
3633 | } | |
3634 | ||
3635 | for (int c = 0; c < vd->vdev_children; c++) { | |
3636 | if (!vdev_is_bootable(vd->vdev_child[c])) | |
3637 | return (B_FALSE); | |
3638 | } | |
3639 | return (B_TRUE); | |
3640 | } | |
3641 | ||
3642 | /* | |
3643 | * Load the state from the original vdev tree (ovd) which | |
3644 | * we've retrieved from the MOS config object. If the original | |
3645 | * vdev was offline or faulted then we transfer that state to the | |
3646 | * device in the current vdev tree (nvd). | |
3647 | */ | |
3648 | void | |
3649 | vdev_load_log_state(vdev_t *nvd, vdev_t *ovd) | |
3650 | { | |
3651 | int c; | |
3652 | ||
3653 | ASSERT(nvd->vdev_top->vdev_islog); | |
3654 | ASSERT(spa_config_held(nvd->vdev_spa, | |
3655 | SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
3656 | ASSERT3U(nvd->vdev_guid, ==, ovd->vdev_guid); | |
3657 | ||
3658 | for (c = 0; c < nvd->vdev_children; c++) | |
3659 | vdev_load_log_state(nvd->vdev_child[c], ovd->vdev_child[c]); | |
3660 | ||
3661 | if (nvd->vdev_ops->vdev_op_leaf) { | |
3662 | /* | |
3663 | * Restore the persistent vdev state | |
3664 | */ | |
3665 | nvd->vdev_offline = ovd->vdev_offline; | |
3666 | nvd->vdev_faulted = ovd->vdev_faulted; | |
3667 | nvd->vdev_degraded = ovd->vdev_degraded; | |
3668 | nvd->vdev_removed = ovd->vdev_removed; | |
3669 | } | |
3670 | } | |
3671 | ||
3672 | /* | |
3673 | * Determine if a log device has valid content. If the vdev was | |
3674 | * removed or faulted in the MOS config then we know that | |
3675 | * the content on the log device has already been written to the pool. | |
3676 | */ | |
3677 | boolean_t | |
3678 | vdev_log_state_valid(vdev_t *vd) | |
3679 | { | |
3680 | int c; | |
3681 | ||
3682 | if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && | |
3683 | !vd->vdev_removed) | |
3684 | return (B_TRUE); | |
3685 | ||
3686 | for (c = 0; c < vd->vdev_children; c++) | |
3687 | if (vdev_log_state_valid(vd->vdev_child[c])) | |
3688 | return (B_TRUE); | |
3689 | ||
3690 | return (B_FALSE); | |
3691 | } | |
3692 | ||
3693 | /* | |
3694 | * Expand a vdev if possible. | |
3695 | */ | |
3696 | void | |
3697 | vdev_expand(vdev_t *vd, uint64_t txg) | |
3698 | { | |
3699 | ASSERT(vd->vdev_top == vd); | |
3700 | ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
3701 | ||
3702 | if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { | |
3703 | VERIFY(vdev_metaslab_init(vd, txg) == 0); | |
3704 | vdev_config_dirty(vd); | |
3705 | } | |
3706 | } | |
3707 | ||
3708 | /* | |
3709 | * Split a vdev. | |
3710 | */ | |
3711 | void | |
3712 | vdev_split(vdev_t *vd) | |
3713 | { | |
3714 | vdev_t *cvd, *pvd = vd->vdev_parent; | |
3715 | ||
3716 | vdev_remove_child(pvd, vd); | |
3717 | vdev_compact_children(pvd); | |
3718 | ||
3719 | cvd = pvd->vdev_child[0]; | |
3720 | if (pvd->vdev_children == 1) { | |
3721 | vdev_remove_parent(cvd); | |
3722 | cvd->vdev_splitting = B_TRUE; | |
3723 | } | |
3724 | vdev_propagate_state(cvd); | |
3725 | } | |
3726 | ||
3727 | void | |
3728 | vdev_deadman(vdev_t *vd) | |
3729 | { | |
3730 | int c; | |
3731 | ||
3732 | for (c = 0; c < vd->vdev_children; c++) { | |
3733 | vdev_t *cvd = vd->vdev_child[c]; | |
3734 | ||
3735 | vdev_deadman(cvd); | |
3736 | } | |
3737 | ||
3738 | if (vd->vdev_ops->vdev_op_leaf) { | |
3739 | vdev_queue_t *vq = &vd->vdev_queue; | |
3740 | ||
3741 | mutex_enter(&vq->vq_lock); | |
3742 | if (avl_numnodes(&vq->vq_active_tree) > 0) { | |
3743 | spa_t *spa = vd->vdev_spa; | |
3744 | zio_t *fio; | |
3745 | uint64_t delta; | |
3746 | ||
3747 | /* | |
3748 | * Look at the head of all the pending queues, | |
3749 | * if any I/O has been outstanding for longer than | |
3750 | * the spa_deadman_synctime we log a zevent. | |
3751 | */ | |
3752 | fio = avl_first(&vq->vq_active_tree); | |
3753 | delta = gethrtime() - fio->io_timestamp; | |
3754 | if (delta > spa_deadman_synctime(spa)) { | |
3755 | zfs_dbgmsg("SLOW IO: zio timestamp %lluns, " | |
3756 | "delta %lluns, last io %lluns", | |
3757 | fio->io_timestamp, delta, | |
3758 | vq->vq_io_complete_ts); | |
3759 | zfs_ereport_post(FM_EREPORT_ZFS_DELAY, | |
3760 | spa, vd, fio, 0, 0); | |
3761 | } | |
3762 | } | |
3763 | mutex_exit(&vq->vq_lock); | |
3764 | } | |
3765 | } | |
3766 | ||
3767 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
3768 | EXPORT_SYMBOL(vdev_fault); | |
3769 | EXPORT_SYMBOL(vdev_degrade); | |
3770 | EXPORT_SYMBOL(vdev_online); | |
3771 | EXPORT_SYMBOL(vdev_offline); | |
3772 | EXPORT_SYMBOL(vdev_clear); | |
3773 | /* BEGIN CSTYLED */ | |
3774 | module_param(metaslabs_per_vdev, int, 0644); | |
3775 | MODULE_PARM_DESC(metaslabs_per_vdev, | |
3776 | "Divide added vdev into approximately (but no more than) this number " | |
3777 | "of metaslabs"); | |
3778 | /* END CSTYLED */ | |
3779 | #endif |