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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
d164b209 | 23 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
24 | * Use is subject to license terms. |
25 | */ | |
26 | ||
34dc7c2f BB |
27 | #include <sys/zfs_context.h> |
28 | #include <sys/fm/fs/zfs.h> | |
29 | #include <sys/spa.h> | |
30 | #include <sys/spa_impl.h> | |
31 | #include <sys/dmu.h> | |
32 | #include <sys/dmu_tx.h> | |
33 | #include <sys/vdev_impl.h> | |
34 | #include <sys/uberblock_impl.h> | |
35 | #include <sys/metaslab.h> | |
36 | #include <sys/metaslab_impl.h> | |
37 | #include <sys/space_map.h> | |
38 | #include <sys/zio.h> | |
39 | #include <sys/zap.h> | |
40 | #include <sys/fs/zfs.h> | |
b128c09f | 41 | #include <sys/arc.h> |
9babb374 | 42 | #include <sys/zil.h> |
34dc7c2f BB |
43 | |
44 | /* | |
45 | * Virtual device management. | |
46 | */ | |
47 | ||
48 | static vdev_ops_t *vdev_ops_table[] = { | |
49 | &vdev_root_ops, | |
50 | &vdev_raidz_ops, | |
51 | &vdev_mirror_ops, | |
52 | &vdev_replacing_ops, | |
53 | &vdev_spare_ops, | |
54 | &vdev_disk_ops, | |
55 | &vdev_file_ops, | |
56 | &vdev_missing_ops, | |
57 | NULL | |
58 | }; | |
59 | ||
b128c09f BB |
60 | /* maximum scrub/resilver I/O queue per leaf vdev */ |
61 | int zfs_scrub_limit = 10; | |
34dc7c2f BB |
62 | |
63 | /* | |
64 | * Given a vdev type, return the appropriate ops vector. | |
65 | */ | |
66 | static vdev_ops_t * | |
67 | vdev_getops(const char *type) | |
68 | { | |
69 | vdev_ops_t *ops, **opspp; | |
70 | ||
71 | for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) | |
72 | if (strcmp(ops->vdev_op_type, type) == 0) | |
73 | break; | |
74 | ||
75 | return (ops); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Default asize function: return the MAX of psize with the asize of | |
80 | * all children. This is what's used by anything other than RAID-Z. | |
81 | */ | |
82 | uint64_t | |
83 | vdev_default_asize(vdev_t *vd, uint64_t psize) | |
84 | { | |
85 | uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); | |
86 | uint64_t csize; | |
34dc7c2f | 87 | |
9babb374 | 88 | for (int c = 0; c < vd->vdev_children; c++) { |
34dc7c2f BB |
89 | csize = vdev_psize_to_asize(vd->vdev_child[c], psize); |
90 | asize = MAX(asize, csize); | |
91 | } | |
92 | ||
93 | return (asize); | |
94 | } | |
95 | ||
96 | /* | |
9babb374 BB |
97 | * Get the minimum allocatable size. We define the allocatable size as |
98 | * the vdev's asize rounded to the nearest metaslab. This allows us to | |
99 | * replace or attach devices which don't have the same physical size but | |
100 | * can still satisfy the same number of allocations. | |
34dc7c2f BB |
101 | */ |
102 | uint64_t | |
9babb374 | 103 | vdev_get_min_asize(vdev_t *vd) |
34dc7c2f | 104 | { |
9babb374 | 105 | vdev_t *pvd = vd->vdev_parent; |
34dc7c2f | 106 | |
9babb374 BB |
107 | /* |
108 | * The our parent is NULL (inactive spare or cache) or is the root, | |
109 | * just return our own asize. | |
110 | */ | |
111 | if (pvd == NULL) | |
112 | return (vd->vdev_asize); | |
34dc7c2f BB |
113 | |
114 | /* | |
9babb374 BB |
115 | * The top-level vdev just returns the allocatable size rounded |
116 | * to the nearest metaslab. | |
34dc7c2f | 117 | */ |
9babb374 BB |
118 | if (vd == vd->vdev_top) |
119 | return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); | |
34dc7c2f | 120 | |
9babb374 BB |
121 | /* |
122 | * The allocatable space for a raidz vdev is N * sizeof(smallest child), | |
123 | * so each child must provide at least 1/Nth of its asize. | |
124 | */ | |
125 | if (pvd->vdev_ops == &vdev_raidz_ops) | |
126 | return (pvd->vdev_min_asize / pvd->vdev_children); | |
34dc7c2f | 127 | |
9babb374 BB |
128 | return (pvd->vdev_min_asize); |
129 | } | |
130 | ||
131 | void | |
132 | vdev_set_min_asize(vdev_t *vd) | |
133 | { | |
134 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
34dc7c2f | 135 | |
9babb374 BB |
136 | for (int c = 0; c < vd->vdev_children; c++) |
137 | vdev_set_min_asize(vd->vdev_child[c]); | |
34dc7c2f BB |
138 | } |
139 | ||
140 | vdev_t * | |
141 | vdev_lookup_top(spa_t *spa, uint64_t vdev) | |
142 | { | |
143 | vdev_t *rvd = spa->spa_root_vdev; | |
144 | ||
b128c09f | 145 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 146 | |
b128c09f BB |
147 | if (vdev < rvd->vdev_children) { |
148 | ASSERT(rvd->vdev_child[vdev] != NULL); | |
34dc7c2f | 149 | return (rvd->vdev_child[vdev]); |
b128c09f | 150 | } |
34dc7c2f BB |
151 | |
152 | return (NULL); | |
153 | } | |
154 | ||
155 | vdev_t * | |
156 | vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) | |
157 | { | |
34dc7c2f BB |
158 | vdev_t *mvd; |
159 | ||
160 | if (vd->vdev_guid == guid) | |
161 | return (vd); | |
162 | ||
9babb374 | 163 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
164 | if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != |
165 | NULL) | |
166 | return (mvd); | |
167 | ||
168 | return (NULL); | |
169 | } | |
170 | ||
171 | void | |
172 | vdev_add_child(vdev_t *pvd, vdev_t *cvd) | |
173 | { | |
174 | size_t oldsize, newsize; | |
175 | uint64_t id = cvd->vdev_id; | |
176 | vdev_t **newchild; | |
177 | ||
b128c09f | 178 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
179 | ASSERT(cvd->vdev_parent == NULL); |
180 | ||
181 | cvd->vdev_parent = pvd; | |
182 | ||
183 | if (pvd == NULL) | |
184 | return; | |
185 | ||
186 | ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); | |
187 | ||
188 | oldsize = pvd->vdev_children * sizeof (vdev_t *); | |
189 | pvd->vdev_children = MAX(pvd->vdev_children, id + 1); | |
190 | newsize = pvd->vdev_children * sizeof (vdev_t *); | |
191 | ||
192 | newchild = kmem_zalloc(newsize, KM_SLEEP); | |
193 | if (pvd->vdev_child != NULL) { | |
194 | bcopy(pvd->vdev_child, newchild, oldsize); | |
195 | kmem_free(pvd->vdev_child, oldsize); | |
196 | } | |
197 | ||
198 | pvd->vdev_child = newchild; | |
199 | pvd->vdev_child[id] = cvd; | |
200 | ||
201 | cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); | |
202 | ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); | |
203 | ||
204 | /* | |
205 | * Walk up all ancestors to update guid sum. | |
206 | */ | |
207 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
208 | pvd->vdev_guid_sum += cvd->vdev_guid_sum; | |
209 | ||
210 | if (cvd->vdev_ops->vdev_op_leaf) | |
211 | cvd->vdev_spa->spa_scrub_maxinflight += zfs_scrub_limit; | |
212 | } | |
213 | ||
214 | void | |
215 | vdev_remove_child(vdev_t *pvd, vdev_t *cvd) | |
216 | { | |
217 | int c; | |
218 | uint_t id = cvd->vdev_id; | |
219 | ||
220 | ASSERT(cvd->vdev_parent == pvd); | |
221 | ||
222 | if (pvd == NULL) | |
223 | return; | |
224 | ||
225 | ASSERT(id < pvd->vdev_children); | |
226 | ASSERT(pvd->vdev_child[id] == cvd); | |
227 | ||
228 | pvd->vdev_child[id] = NULL; | |
229 | cvd->vdev_parent = NULL; | |
230 | ||
231 | for (c = 0; c < pvd->vdev_children; c++) | |
232 | if (pvd->vdev_child[c]) | |
233 | break; | |
234 | ||
235 | if (c == pvd->vdev_children) { | |
236 | kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); | |
237 | pvd->vdev_child = NULL; | |
238 | pvd->vdev_children = 0; | |
239 | } | |
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 | if (cvd->vdev_ops->vdev_op_leaf) | |
248 | cvd->vdev_spa->spa_scrub_maxinflight -= zfs_scrub_limit; | |
249 | } | |
250 | ||
251 | /* | |
252 | * Remove any holes in the child array. | |
253 | */ | |
254 | void | |
255 | vdev_compact_children(vdev_t *pvd) | |
256 | { | |
257 | vdev_t **newchild, *cvd; | |
258 | int oldc = pvd->vdev_children; | |
9babb374 | 259 | int newc; |
34dc7c2f | 260 | |
b128c09f | 261 | ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f | 262 | |
9babb374 | 263 | for (int c = newc = 0; c < oldc; c++) |
34dc7c2f BB |
264 | if (pvd->vdev_child[c]) |
265 | newc++; | |
266 | ||
267 | newchild = kmem_alloc(newc * sizeof (vdev_t *), KM_SLEEP); | |
268 | ||
9babb374 | 269 | for (int c = newc = 0; c < oldc; c++) { |
34dc7c2f BB |
270 | if ((cvd = pvd->vdev_child[c]) != NULL) { |
271 | newchild[newc] = cvd; | |
272 | cvd->vdev_id = newc++; | |
273 | } | |
274 | } | |
275 | ||
276 | kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); | |
277 | pvd->vdev_child = newchild; | |
278 | pvd->vdev_children = newc; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Allocate and minimally initialize a vdev_t. | |
283 | */ | |
284 | static vdev_t * | |
285 | vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) | |
286 | { | |
287 | vdev_t *vd; | |
288 | ||
289 | vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); | |
290 | ||
291 | if (spa->spa_root_vdev == NULL) { | |
292 | ASSERT(ops == &vdev_root_ops); | |
293 | spa->spa_root_vdev = vd; | |
294 | } | |
295 | ||
296 | if (guid == 0) { | |
297 | if (spa->spa_root_vdev == vd) { | |
298 | /* | |
299 | * The root vdev's guid will also be the pool guid, | |
300 | * which must be unique among all pools. | |
301 | */ | |
302 | while (guid == 0 || spa_guid_exists(guid, 0)) | |
303 | guid = spa_get_random(-1ULL); | |
304 | } else { | |
305 | /* | |
306 | * Any other vdev's guid must be unique within the pool. | |
307 | */ | |
308 | while (guid == 0 || | |
309 | spa_guid_exists(spa_guid(spa), guid)) | |
310 | guid = spa_get_random(-1ULL); | |
311 | } | |
312 | ASSERT(!spa_guid_exists(spa_guid(spa), guid)); | |
313 | } | |
314 | ||
315 | vd->vdev_spa = spa; | |
316 | vd->vdev_id = id; | |
317 | vd->vdev_guid = guid; | |
318 | vd->vdev_guid_sum = guid; | |
319 | vd->vdev_ops = ops; | |
320 | vd->vdev_state = VDEV_STATE_CLOSED; | |
321 | ||
322 | mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_DEFAULT, NULL); | |
323 | mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); | |
b128c09f | 324 | mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); |
fb5f0bc8 BB |
325 | for (int t = 0; t < DTL_TYPES; t++) { |
326 | space_map_create(&vd->vdev_dtl[t], 0, -1ULL, 0, | |
327 | &vd->vdev_dtl_lock); | |
328 | } | |
34dc7c2f BB |
329 | txg_list_create(&vd->vdev_ms_list, |
330 | offsetof(struct metaslab, ms_txg_node)); | |
331 | txg_list_create(&vd->vdev_dtl_list, | |
332 | offsetof(struct vdev, vdev_dtl_node)); | |
333 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
334 | vdev_queue_init(vd); | |
335 | vdev_cache_init(vd); | |
336 | ||
337 | return (vd); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
342 | * creating a new vdev or loading an existing one - the behavior is slightly | |
343 | * different for each case. | |
344 | */ | |
345 | int | |
346 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
347 | int alloctype) | |
348 | { | |
349 | vdev_ops_t *ops; | |
350 | char *type; | |
351 | uint64_t guid = 0, islog, nparity; | |
352 | vdev_t *vd; | |
353 | ||
b128c09f | 354 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
355 | |
356 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
357 | return (EINVAL); | |
358 | ||
359 | if ((ops = vdev_getops(type)) == NULL) | |
360 | return (EINVAL); | |
361 | ||
362 | /* | |
363 | * If this is a load, get the vdev guid from the nvlist. | |
364 | * Otherwise, vdev_alloc_common() will generate one for us. | |
365 | */ | |
366 | if (alloctype == VDEV_ALLOC_LOAD) { | |
367 | uint64_t label_id; | |
368 | ||
369 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
370 | label_id != id) | |
371 | return (EINVAL); | |
372 | ||
373 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
374 | return (EINVAL); | |
375 | } else if (alloctype == VDEV_ALLOC_SPARE) { | |
376 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
377 | return (EINVAL); | |
378 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { | |
379 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
380 | return (EINVAL); | |
9babb374 BB |
381 | } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { |
382 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
383 | return (EINVAL); | |
34dc7c2f BB |
384 | } |
385 | ||
386 | /* | |
387 | * The first allocated vdev must be of type 'root'. | |
388 | */ | |
389 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
390 | return (EINVAL); | |
391 | ||
392 | /* | |
393 | * Determine whether we're a log vdev. | |
394 | */ | |
395 | islog = 0; | |
396 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
397 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
398 | return (ENOTSUP); | |
399 | ||
400 | /* | |
401 | * Set the nparity property for RAID-Z vdevs. | |
402 | */ | |
403 | nparity = -1ULL; | |
404 | if (ops == &vdev_raidz_ops) { | |
405 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
406 | &nparity) == 0) { | |
407 | /* | |
408 | * Currently, we can only support 2 parity devices. | |
409 | */ | |
410 | if (nparity == 0 || nparity > 2) | |
411 | return (EINVAL); | |
412 | /* | |
413 | * Older versions can only support 1 parity device. | |
414 | */ | |
415 | if (nparity == 2 && | |
416 | spa_version(spa) < SPA_VERSION_RAID6) | |
417 | return (ENOTSUP); | |
418 | } else { | |
419 | /* | |
420 | * We require the parity to be specified for SPAs that | |
421 | * support multiple parity levels. | |
422 | */ | |
423 | if (spa_version(spa) >= SPA_VERSION_RAID6) | |
424 | return (EINVAL); | |
425 | /* | |
426 | * Otherwise, we default to 1 parity device for RAID-Z. | |
427 | */ | |
428 | nparity = 1; | |
429 | } | |
430 | } else { | |
431 | nparity = 0; | |
432 | } | |
433 | ASSERT(nparity != -1ULL); | |
434 | ||
435 | vd = vdev_alloc_common(spa, id, guid, ops); | |
436 | ||
437 | vd->vdev_islog = islog; | |
438 | vd->vdev_nparity = nparity; | |
439 | ||
440 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
441 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
442 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) | |
443 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
444 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
445 | &vd->vdev_physpath) == 0) | |
446 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
9babb374 BB |
447 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) |
448 | vd->vdev_fru = spa_strdup(vd->vdev_fru); | |
34dc7c2f BB |
449 | |
450 | /* | |
451 | * Set the whole_disk property. If it's not specified, leave the value | |
452 | * as -1. | |
453 | */ | |
454 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
455 | &vd->vdev_wholedisk) != 0) | |
456 | vd->vdev_wholedisk = -1ULL; | |
457 | ||
458 | /* | |
459 | * Look for the 'not present' flag. This will only be set if the device | |
460 | * was not present at the time of import. | |
461 | */ | |
9babb374 BB |
462 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, |
463 | &vd->vdev_not_present); | |
34dc7c2f BB |
464 | |
465 | /* | |
466 | * Get the alignment requirement. | |
467 | */ | |
468 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
469 | ||
470 | /* | |
471 | * If we're a top-level vdev, try to load the allocation parameters. | |
472 | */ | |
473 | if (parent && !parent->vdev_parent && alloctype == VDEV_ALLOC_LOAD) { | |
474 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, | |
475 | &vd->vdev_ms_array); | |
476 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
477 | &vd->vdev_ms_shift); | |
478 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
479 | &vd->vdev_asize); | |
480 | } | |
481 | ||
482 | /* | |
483 | * If we're a leaf vdev, try to load the DTL object and other state. | |
484 | */ | |
b128c09f | 485 | if (vd->vdev_ops->vdev_op_leaf && |
9babb374 BB |
486 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || |
487 | alloctype == VDEV_ALLOC_ROOTPOOL)) { | |
b128c09f BB |
488 | if (alloctype == VDEV_ALLOC_LOAD) { |
489 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
fb5f0bc8 | 490 | &vd->vdev_dtl_smo.smo_object); |
b128c09f BB |
491 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, |
492 | &vd->vdev_unspare); | |
493 | } | |
9babb374 BB |
494 | |
495 | if (alloctype == VDEV_ALLOC_ROOTPOOL) { | |
496 | uint64_t spare = 0; | |
497 | ||
498 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, | |
499 | &spare) == 0 && spare) | |
500 | spa_spare_add(vd); | |
501 | } | |
502 | ||
34dc7c2f BB |
503 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, |
504 | &vd->vdev_offline); | |
b128c09f | 505 | |
34dc7c2f BB |
506 | /* |
507 | * When importing a pool, we want to ignore the persistent fault | |
508 | * state, as the diagnosis made on another system may not be | |
509 | * valid in the current context. | |
510 | */ | |
511 | if (spa->spa_load_state == SPA_LOAD_OPEN) { | |
512 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, | |
513 | &vd->vdev_faulted); | |
514 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
515 | &vd->vdev_degraded); | |
516 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
517 | &vd->vdev_removed); | |
518 | } | |
519 | } | |
520 | ||
521 | /* | |
522 | * Add ourselves to the parent's list of children. | |
523 | */ | |
524 | vdev_add_child(parent, vd); | |
525 | ||
526 | *vdp = vd; | |
527 | ||
528 | return (0); | |
529 | } | |
530 | ||
531 | void | |
532 | vdev_free(vdev_t *vd) | |
533 | { | |
34dc7c2f BB |
534 | spa_t *spa = vd->vdev_spa; |
535 | ||
536 | /* | |
537 | * vdev_free() implies closing the vdev first. This is simpler than | |
538 | * trying to ensure complicated semantics for all callers. | |
539 | */ | |
540 | vdev_close(vd); | |
541 | ||
b128c09f | 542 | ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); |
34dc7c2f BB |
543 | |
544 | /* | |
545 | * Free all children. | |
546 | */ | |
9babb374 | 547 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
548 | vdev_free(vd->vdev_child[c]); |
549 | ||
550 | ASSERT(vd->vdev_child == NULL); | |
551 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
552 | ||
553 | /* | |
554 | * Discard allocation state. | |
555 | */ | |
556 | if (vd == vd->vdev_top) | |
557 | vdev_metaslab_fini(vd); | |
558 | ||
559 | ASSERT3U(vd->vdev_stat.vs_space, ==, 0); | |
560 | ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0); | |
561 | ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0); | |
562 | ||
563 | /* | |
564 | * Remove this vdev from its parent's child list. | |
565 | */ | |
566 | vdev_remove_child(vd->vdev_parent, vd); | |
567 | ||
568 | ASSERT(vd->vdev_parent == NULL); | |
569 | ||
570 | /* | |
571 | * Clean up vdev structure. | |
572 | */ | |
573 | vdev_queue_fini(vd); | |
574 | vdev_cache_fini(vd); | |
575 | ||
576 | if (vd->vdev_path) | |
577 | spa_strfree(vd->vdev_path); | |
578 | if (vd->vdev_devid) | |
579 | spa_strfree(vd->vdev_devid); | |
580 | if (vd->vdev_physpath) | |
581 | spa_strfree(vd->vdev_physpath); | |
9babb374 BB |
582 | if (vd->vdev_fru) |
583 | spa_strfree(vd->vdev_fru); | |
34dc7c2f BB |
584 | |
585 | if (vd->vdev_isspare) | |
586 | spa_spare_remove(vd); | |
587 | if (vd->vdev_isl2cache) | |
588 | spa_l2cache_remove(vd); | |
589 | ||
590 | txg_list_destroy(&vd->vdev_ms_list); | |
591 | txg_list_destroy(&vd->vdev_dtl_list); | |
fb5f0bc8 | 592 | |
34dc7c2f | 593 | mutex_enter(&vd->vdev_dtl_lock); |
fb5f0bc8 BB |
594 | for (int t = 0; t < DTL_TYPES; t++) { |
595 | space_map_unload(&vd->vdev_dtl[t]); | |
596 | space_map_destroy(&vd->vdev_dtl[t]); | |
597 | } | |
34dc7c2f | 598 | mutex_exit(&vd->vdev_dtl_lock); |
fb5f0bc8 | 599 | |
34dc7c2f BB |
600 | mutex_destroy(&vd->vdev_dtl_lock); |
601 | mutex_destroy(&vd->vdev_stat_lock); | |
b128c09f | 602 | mutex_destroy(&vd->vdev_probe_lock); |
34dc7c2f BB |
603 | |
604 | if (vd == spa->spa_root_vdev) | |
605 | spa->spa_root_vdev = NULL; | |
606 | ||
607 | kmem_free(vd, sizeof (vdev_t)); | |
608 | } | |
609 | ||
610 | /* | |
611 | * Transfer top-level vdev state from svd to tvd. | |
612 | */ | |
613 | static void | |
614 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
615 | { | |
616 | spa_t *spa = svd->vdev_spa; | |
617 | metaslab_t *msp; | |
618 | vdev_t *vd; | |
619 | int t; | |
620 | ||
621 | ASSERT(tvd == tvd->vdev_top); | |
622 | ||
623 | tvd->vdev_ms_array = svd->vdev_ms_array; | |
624 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
625 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
626 | ||
627 | svd->vdev_ms_array = 0; | |
628 | svd->vdev_ms_shift = 0; | |
629 | svd->vdev_ms_count = 0; | |
630 | ||
631 | tvd->vdev_mg = svd->vdev_mg; | |
632 | tvd->vdev_ms = svd->vdev_ms; | |
633 | ||
634 | svd->vdev_mg = NULL; | |
635 | svd->vdev_ms = NULL; | |
636 | ||
637 | if (tvd->vdev_mg != NULL) | |
638 | tvd->vdev_mg->mg_vd = tvd; | |
639 | ||
640 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; | |
641 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
642 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
643 | ||
644 | svd->vdev_stat.vs_alloc = 0; | |
645 | svd->vdev_stat.vs_space = 0; | |
646 | svd->vdev_stat.vs_dspace = 0; | |
647 | ||
648 | for (t = 0; t < TXG_SIZE; t++) { | |
649 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
650 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
651 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
652 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
653 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
654 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
655 | } | |
656 | ||
b128c09f | 657 | if (list_link_active(&svd->vdev_config_dirty_node)) { |
34dc7c2f BB |
658 | vdev_config_clean(svd); |
659 | vdev_config_dirty(tvd); | |
660 | } | |
661 | ||
b128c09f BB |
662 | if (list_link_active(&svd->vdev_state_dirty_node)) { |
663 | vdev_state_clean(svd); | |
664 | vdev_state_dirty(tvd); | |
665 | } | |
666 | ||
34dc7c2f BB |
667 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; |
668 | svd->vdev_deflate_ratio = 0; | |
669 | ||
670 | tvd->vdev_islog = svd->vdev_islog; | |
671 | svd->vdev_islog = 0; | |
672 | } | |
673 | ||
674 | static void | |
675 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
676 | { | |
34dc7c2f BB |
677 | if (vd == NULL) |
678 | return; | |
679 | ||
680 | vd->vdev_top = tvd; | |
681 | ||
9babb374 | 682 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
683 | vdev_top_update(tvd, vd->vdev_child[c]); |
684 | } | |
685 | ||
686 | /* | |
687 | * Add a mirror/replacing vdev above an existing vdev. | |
688 | */ | |
689 | vdev_t * | |
690 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
691 | { | |
692 | spa_t *spa = cvd->vdev_spa; | |
693 | vdev_t *pvd = cvd->vdev_parent; | |
694 | vdev_t *mvd; | |
695 | ||
b128c09f | 696 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
697 | |
698 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
699 | ||
700 | mvd->vdev_asize = cvd->vdev_asize; | |
9babb374 | 701 | mvd->vdev_min_asize = cvd->vdev_min_asize; |
34dc7c2f BB |
702 | mvd->vdev_ashift = cvd->vdev_ashift; |
703 | mvd->vdev_state = cvd->vdev_state; | |
704 | ||
705 | vdev_remove_child(pvd, cvd); | |
706 | vdev_add_child(pvd, mvd); | |
707 | cvd->vdev_id = mvd->vdev_children; | |
708 | vdev_add_child(mvd, cvd); | |
709 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
710 | ||
711 | if (mvd == mvd->vdev_top) | |
712 | vdev_top_transfer(cvd, mvd); | |
713 | ||
714 | return (mvd); | |
715 | } | |
716 | ||
717 | /* | |
718 | * Remove a 1-way mirror/replacing vdev from the tree. | |
719 | */ | |
720 | void | |
721 | vdev_remove_parent(vdev_t *cvd) | |
722 | { | |
723 | vdev_t *mvd = cvd->vdev_parent; | |
724 | vdev_t *pvd = mvd->vdev_parent; | |
725 | ||
b128c09f | 726 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
727 | |
728 | ASSERT(mvd->vdev_children == 1); | |
729 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
730 | mvd->vdev_ops == &vdev_replacing_ops || | |
731 | mvd->vdev_ops == &vdev_spare_ops); | |
732 | cvd->vdev_ashift = mvd->vdev_ashift; | |
733 | ||
734 | vdev_remove_child(mvd, cvd); | |
735 | vdev_remove_child(pvd, mvd); | |
fb5f0bc8 | 736 | |
34dc7c2f | 737 | /* |
b128c09f BB |
738 | * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. |
739 | * Otherwise, we could have detached an offline device, and when we | |
740 | * go to import the pool we'll think we have two top-level vdevs, | |
741 | * instead of a different version of the same top-level vdev. | |
34dc7c2f | 742 | */ |
fb5f0bc8 BB |
743 | if (mvd->vdev_top == mvd) { |
744 | uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; | |
745 | cvd->vdev_guid += guid_delta; | |
746 | cvd->vdev_guid_sum += guid_delta; | |
747 | } | |
b128c09f BB |
748 | cvd->vdev_id = mvd->vdev_id; |
749 | vdev_add_child(pvd, cvd); | |
34dc7c2f BB |
750 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); |
751 | ||
752 | if (cvd == cvd->vdev_top) | |
753 | vdev_top_transfer(mvd, cvd); | |
754 | ||
755 | ASSERT(mvd->vdev_children == 0); | |
756 | vdev_free(mvd); | |
757 | } | |
758 | ||
759 | int | |
760 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
761 | { | |
762 | spa_t *spa = vd->vdev_spa; | |
763 | objset_t *mos = spa->spa_meta_objset; | |
764 | metaslab_class_t *mc; | |
765 | uint64_t m; | |
766 | uint64_t oldc = vd->vdev_ms_count; | |
767 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
768 | metaslab_t **mspp; | |
769 | int error; | |
770 | ||
771 | if (vd->vdev_ms_shift == 0) /* not being allocated from yet */ | |
772 | return (0); | |
773 | ||
9babb374 BB |
774 | /* |
775 | * Compute the raidz-deflation ratio. Note, we hard-code | |
776 | * in 128k (1 << 17) because it is the current "typical" blocksize. | |
777 | * Even if SPA_MAXBLOCKSIZE changes, this algorithm must never change, | |
778 | * or we will inconsistently account for existing bp's. | |
779 | */ | |
780 | vd->vdev_deflate_ratio = (1 << 17) / | |
781 | (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); | |
782 | ||
34dc7c2f BB |
783 | ASSERT(oldc <= newc); |
784 | ||
785 | if (vd->vdev_islog) | |
786 | mc = spa->spa_log_class; | |
787 | else | |
788 | mc = spa->spa_normal_class; | |
789 | ||
790 | if (vd->vdev_mg == NULL) | |
791 | vd->vdev_mg = metaslab_group_create(mc, vd); | |
792 | ||
793 | mspp = kmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); | |
794 | ||
795 | if (oldc != 0) { | |
796 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
797 | kmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); | |
798 | } | |
799 | ||
800 | vd->vdev_ms = mspp; | |
801 | vd->vdev_ms_count = newc; | |
802 | ||
803 | for (m = oldc; m < newc; m++) { | |
804 | space_map_obj_t smo = { 0, 0, 0 }; | |
805 | if (txg == 0) { | |
806 | uint64_t object = 0; | |
807 | error = dmu_read(mos, vd->vdev_ms_array, | |
9babb374 BB |
808 | m * sizeof (uint64_t), sizeof (uint64_t), &object, |
809 | DMU_READ_PREFETCH); | |
34dc7c2f BB |
810 | if (error) |
811 | return (error); | |
812 | if (object != 0) { | |
813 | dmu_buf_t *db; | |
814 | error = dmu_bonus_hold(mos, object, FTAG, &db); | |
815 | if (error) | |
816 | return (error); | |
817 | ASSERT3U(db->db_size, >=, sizeof (smo)); | |
818 | bcopy(db->db_data, &smo, sizeof (smo)); | |
819 | ASSERT3U(smo.smo_object, ==, object); | |
820 | dmu_buf_rele(db, FTAG); | |
821 | } | |
822 | } | |
823 | vd->vdev_ms[m] = metaslab_init(vd->vdev_mg, &smo, | |
824 | m << vd->vdev_ms_shift, 1ULL << vd->vdev_ms_shift, txg); | |
825 | } | |
826 | ||
827 | return (0); | |
828 | } | |
829 | ||
830 | void | |
831 | vdev_metaslab_fini(vdev_t *vd) | |
832 | { | |
833 | uint64_t m; | |
834 | uint64_t count = vd->vdev_ms_count; | |
835 | ||
836 | if (vd->vdev_ms != NULL) { | |
837 | for (m = 0; m < count; m++) | |
838 | if (vd->vdev_ms[m] != NULL) | |
839 | metaslab_fini(vd->vdev_ms[m]); | |
840 | kmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); | |
841 | vd->vdev_ms = NULL; | |
842 | } | |
843 | } | |
844 | ||
b128c09f BB |
845 | typedef struct vdev_probe_stats { |
846 | boolean_t vps_readable; | |
847 | boolean_t vps_writeable; | |
848 | int vps_flags; | |
b128c09f BB |
849 | } vdev_probe_stats_t; |
850 | ||
851 | static void | |
852 | vdev_probe_done(zio_t *zio) | |
34dc7c2f | 853 | { |
fb5f0bc8 | 854 | spa_t *spa = zio->io_spa; |
d164b209 | 855 | vdev_t *vd = zio->io_vd; |
b128c09f | 856 | vdev_probe_stats_t *vps = zio->io_private; |
d164b209 BB |
857 | |
858 | ASSERT(vd->vdev_probe_zio != NULL); | |
b128c09f BB |
859 | |
860 | if (zio->io_type == ZIO_TYPE_READ) { | |
b128c09f BB |
861 | if (zio->io_error == 0) |
862 | vps->vps_readable = 1; | |
fb5f0bc8 | 863 | if (zio->io_error == 0 && spa_writeable(spa)) { |
d164b209 | 864 | zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, |
b128c09f BB |
865 | zio->io_offset, zio->io_size, zio->io_data, |
866 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, | |
867 | ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); | |
868 | } else { | |
869 | zio_buf_free(zio->io_data, zio->io_size); | |
870 | } | |
871 | } else if (zio->io_type == ZIO_TYPE_WRITE) { | |
b128c09f BB |
872 | if (zio->io_error == 0) |
873 | vps->vps_writeable = 1; | |
874 | zio_buf_free(zio->io_data, zio->io_size); | |
875 | } else if (zio->io_type == ZIO_TYPE_NULL) { | |
d164b209 | 876 | zio_t *pio; |
b128c09f BB |
877 | |
878 | vd->vdev_cant_read |= !vps->vps_readable; | |
879 | vd->vdev_cant_write |= !vps->vps_writeable; | |
880 | ||
881 | if (vdev_readable(vd) && | |
fb5f0bc8 | 882 | (vdev_writeable(vd) || !spa_writeable(spa))) { |
b128c09f BB |
883 | zio->io_error = 0; |
884 | } else { | |
885 | ASSERT(zio->io_error != 0); | |
886 | zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, | |
fb5f0bc8 | 887 | spa, vd, NULL, 0, 0); |
b128c09f BB |
888 | zio->io_error = ENXIO; |
889 | } | |
d164b209 BB |
890 | |
891 | mutex_enter(&vd->vdev_probe_lock); | |
892 | ASSERT(vd->vdev_probe_zio == zio); | |
893 | vd->vdev_probe_zio = NULL; | |
894 | mutex_exit(&vd->vdev_probe_lock); | |
895 | ||
896 | while ((pio = zio_walk_parents(zio)) != NULL) | |
897 | if (!vdev_accessible(vd, pio)) | |
898 | pio->io_error = ENXIO; | |
899 | ||
b128c09f BB |
900 | kmem_free(vps, sizeof (*vps)); |
901 | } | |
902 | } | |
34dc7c2f | 903 | |
b128c09f BB |
904 | /* |
905 | * Determine whether this device is accessible by reading and writing | |
906 | * to several known locations: the pad regions of each vdev label | |
907 | * but the first (which we leave alone in case it contains a VTOC). | |
908 | */ | |
909 | zio_t * | |
d164b209 | 910 | vdev_probe(vdev_t *vd, zio_t *zio) |
b128c09f BB |
911 | { |
912 | spa_t *spa = vd->vdev_spa; | |
d164b209 BB |
913 | vdev_probe_stats_t *vps = NULL; |
914 | zio_t *pio; | |
915 | ||
916 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
34dc7c2f | 917 | |
d164b209 BB |
918 | /* |
919 | * Don't probe the probe. | |
920 | */ | |
921 | if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) | |
922 | return (NULL); | |
b128c09f | 923 | |
d164b209 BB |
924 | /* |
925 | * To prevent 'probe storms' when a device fails, we create | |
926 | * just one probe i/o at a time. All zios that want to probe | |
927 | * this vdev will become parents of the probe io. | |
928 | */ | |
929 | mutex_enter(&vd->vdev_probe_lock); | |
b128c09f | 930 | |
d164b209 BB |
931 | if ((pio = vd->vdev_probe_zio) == NULL) { |
932 | vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); | |
933 | ||
934 | vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | | |
935 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | | |
9babb374 | 936 | ZIO_FLAG_TRYHARD; |
d164b209 BB |
937 | |
938 | if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { | |
939 | /* | |
940 | * vdev_cant_read and vdev_cant_write can only | |
941 | * transition from TRUE to FALSE when we have the | |
942 | * SCL_ZIO lock as writer; otherwise they can only | |
943 | * transition from FALSE to TRUE. This ensures that | |
944 | * any zio looking at these values can assume that | |
945 | * failures persist for the life of the I/O. That's | |
946 | * important because when a device has intermittent | |
947 | * connectivity problems, we want to ensure that | |
948 | * they're ascribed to the device (ENXIO) and not | |
949 | * the zio (EIO). | |
950 | * | |
951 | * Since we hold SCL_ZIO as writer here, clear both | |
952 | * values so the probe can reevaluate from first | |
953 | * principles. | |
954 | */ | |
955 | vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; | |
956 | vd->vdev_cant_read = B_FALSE; | |
957 | vd->vdev_cant_write = B_FALSE; | |
958 | } | |
959 | ||
960 | vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, | |
961 | vdev_probe_done, vps, | |
962 | vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); | |
963 | ||
964 | if (zio != NULL) { | |
965 | vd->vdev_probe_wanted = B_TRUE; | |
966 | spa_async_request(spa, SPA_ASYNC_PROBE); | |
967 | } | |
b128c09f BB |
968 | } |
969 | ||
d164b209 BB |
970 | if (zio != NULL) |
971 | zio_add_child(zio, pio); | |
b128c09f | 972 | |
d164b209 | 973 | mutex_exit(&vd->vdev_probe_lock); |
b128c09f | 974 | |
d164b209 BB |
975 | if (vps == NULL) { |
976 | ASSERT(zio != NULL); | |
977 | return (NULL); | |
978 | } | |
b128c09f BB |
979 | |
980 | for (int l = 1; l < VDEV_LABELS; l++) { | |
d164b209 | 981 | zio_nowait(zio_read_phys(pio, vd, |
b128c09f | 982 | vdev_label_offset(vd->vdev_psize, l, |
9babb374 BB |
983 | offsetof(vdev_label_t, vl_pad2)), |
984 | VDEV_PAD_SIZE, zio_buf_alloc(VDEV_PAD_SIZE), | |
b128c09f BB |
985 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, |
986 | ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); | |
987 | } | |
988 | ||
d164b209 BB |
989 | if (zio == NULL) |
990 | return (pio); | |
991 | ||
992 | zio_nowait(pio); | |
993 | return (NULL); | |
34dc7c2f BB |
994 | } |
995 | ||
996 | /* | |
997 | * Prepare a virtual device for access. | |
998 | */ | |
999 | int | |
1000 | vdev_open(vdev_t *vd) | |
1001 | { | |
fb5f0bc8 | 1002 | spa_t *spa = vd->vdev_spa; |
34dc7c2f | 1003 | int error; |
34dc7c2f BB |
1004 | uint64_t osize = 0; |
1005 | uint64_t asize, psize; | |
1006 | uint64_t ashift = 0; | |
1007 | ||
fb5f0bc8 BB |
1008 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
1009 | ||
34dc7c2f BB |
1010 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || |
1011 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
1012 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
1013 | ||
34dc7c2f | 1014 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; |
9babb374 BB |
1015 | vd->vdev_cant_read = B_FALSE; |
1016 | vd->vdev_cant_write = B_FALSE; | |
1017 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
34dc7c2f BB |
1018 | |
1019 | if (!vd->vdev_removed && vd->vdev_faulted) { | |
1020 | ASSERT(vd->vdev_children == 0); | |
1021 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
1022 | VDEV_AUX_ERR_EXCEEDED); | |
1023 | return (ENXIO); | |
1024 | } else if (vd->vdev_offline) { | |
1025 | ASSERT(vd->vdev_children == 0); | |
1026 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
1027 | return (ENXIO); | |
1028 | } | |
1029 | ||
1030 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &ashift); | |
1031 | ||
1032 | if (zio_injection_enabled && error == 0) | |
9babb374 | 1033 | error = zio_handle_device_injection(vd, NULL, ENXIO); |
34dc7c2f BB |
1034 | |
1035 | if (error) { | |
1036 | if (vd->vdev_removed && | |
1037 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
1038 | vd->vdev_removed = B_FALSE; | |
1039 | ||
1040 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1041 | vd->vdev_stat.vs_aux); | |
1042 | return (error); | |
1043 | } | |
1044 | ||
1045 | vd->vdev_removed = B_FALSE; | |
1046 | ||
1047 | if (vd->vdev_degraded) { | |
1048 | ASSERT(vd->vdev_children == 0); | |
1049 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1050 | VDEV_AUX_ERR_EXCEEDED); | |
1051 | } else { | |
1052 | vd->vdev_state = VDEV_STATE_HEALTHY; | |
1053 | } | |
1054 | ||
9babb374 | 1055 | for (int c = 0; c < vd->vdev_children; c++) { |
34dc7c2f BB |
1056 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { |
1057 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1058 | VDEV_AUX_NONE); | |
1059 | break; | |
1060 | } | |
9babb374 | 1061 | } |
34dc7c2f BB |
1062 | |
1063 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
1064 | ||
1065 | if (vd->vdev_children == 0) { | |
1066 | if (osize < SPA_MINDEVSIZE) { | |
1067 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1068 | VDEV_AUX_TOO_SMALL); | |
1069 | return (EOVERFLOW); | |
1070 | } | |
1071 | psize = osize; | |
1072 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
1073 | } else { | |
1074 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
1075 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
1076 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1077 | VDEV_AUX_TOO_SMALL); | |
1078 | return (EOVERFLOW); | |
1079 | } | |
1080 | psize = 0; | |
1081 | asize = osize; | |
1082 | } | |
1083 | ||
1084 | vd->vdev_psize = psize; | |
1085 | ||
9babb374 BB |
1086 | /* |
1087 | * Make sure the allocatable size hasn't shrunk. | |
1088 | */ | |
1089 | if (asize < vd->vdev_min_asize) { | |
1090 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1091 | VDEV_AUX_BAD_LABEL); | |
1092 | return (EINVAL); | |
1093 | } | |
1094 | ||
34dc7c2f BB |
1095 | if (vd->vdev_asize == 0) { |
1096 | /* | |
1097 | * This is the first-ever open, so use the computed values. | |
1098 | * For testing purposes, a higher ashift can be requested. | |
1099 | */ | |
1100 | vd->vdev_asize = asize; | |
1101 | vd->vdev_ashift = MAX(ashift, vd->vdev_ashift); | |
1102 | } else { | |
1103 | /* | |
1104 | * Make sure the alignment requirement hasn't increased. | |
1105 | */ | |
1106 | if (ashift > vd->vdev_top->vdev_ashift) { | |
1107 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1108 | VDEV_AUX_BAD_LABEL); | |
1109 | return (EINVAL); | |
1110 | } | |
9babb374 | 1111 | } |
34dc7c2f | 1112 | |
9babb374 BB |
1113 | /* |
1114 | * If all children are healthy and the asize has increased, | |
1115 | * then we've experienced dynamic LUN growth. If automatic | |
1116 | * expansion is enabled then use the additional space. | |
1117 | */ | |
1118 | if (vd->vdev_state == VDEV_STATE_HEALTHY && asize > vd->vdev_asize && | |
1119 | (vd->vdev_expanding || spa->spa_autoexpand)) | |
1120 | vd->vdev_asize = asize; | |
34dc7c2f | 1121 | |
9babb374 | 1122 | vdev_set_min_asize(vd); |
34dc7c2f BB |
1123 | |
1124 | /* | |
1125 | * Ensure we can issue some IO before declaring the | |
1126 | * vdev open for business. | |
1127 | */ | |
b128c09f BB |
1128 | if (vd->vdev_ops->vdev_op_leaf && |
1129 | (error = zio_wait(vdev_probe(vd, NULL))) != 0) { | |
34dc7c2f | 1130 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, |
b128c09f | 1131 | VDEV_AUX_IO_FAILURE); |
34dc7c2f BB |
1132 | return (error); |
1133 | } | |
1134 | ||
34dc7c2f | 1135 | /* |
b128c09f | 1136 | * If a leaf vdev has a DTL, and seems healthy, then kick off a |
fb5f0bc8 BB |
1137 | * resilver. But don't do this if we are doing a reopen for a scrub, |
1138 | * since this would just restart the scrub we are already doing. | |
34dc7c2f | 1139 | */ |
fb5f0bc8 BB |
1140 | if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && |
1141 | vdev_resilver_needed(vd, NULL, NULL)) | |
1142 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
34dc7c2f BB |
1143 | |
1144 | return (0); | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * Called once the vdevs are all opened, this routine validates the label | |
1149 | * contents. This needs to be done before vdev_load() so that we don't | |
1150 | * inadvertently do repair I/Os to the wrong device. | |
1151 | * | |
1152 | * This function will only return failure if one of the vdevs indicates that it | |
1153 | * has since been destroyed or exported. This is only possible if | |
1154 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
1155 | * will be updated but the function will return 0. | |
1156 | */ | |
1157 | int | |
1158 | vdev_validate(vdev_t *vd) | |
1159 | { | |
1160 | spa_t *spa = vd->vdev_spa; | |
34dc7c2f | 1161 | nvlist_t *label; |
b128c09f | 1162 | uint64_t guid, top_guid; |
34dc7c2f BB |
1163 | uint64_t state; |
1164 | ||
9babb374 | 1165 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
1166 | if (vdev_validate(vd->vdev_child[c]) != 0) |
1167 | return (EBADF); | |
1168 | ||
1169 | /* | |
1170 | * If the device has already failed, or was marked offline, don't do | |
1171 | * any further validation. Otherwise, label I/O will fail and we will | |
1172 | * overwrite the previous state. | |
1173 | */ | |
b128c09f | 1174 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { |
34dc7c2f BB |
1175 | |
1176 | if ((label = vdev_label_read_config(vd)) == NULL) { | |
1177 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1178 | VDEV_AUX_BAD_LABEL); | |
1179 | return (0); | |
1180 | } | |
1181 | ||
1182 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, | |
1183 | &guid) != 0 || guid != spa_guid(spa)) { | |
1184 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1185 | VDEV_AUX_CORRUPT_DATA); | |
1186 | nvlist_free(label); | |
1187 | return (0); | |
1188 | } | |
1189 | ||
b128c09f BB |
1190 | /* |
1191 | * If this vdev just became a top-level vdev because its | |
1192 | * sibling was detached, it will have adopted the parent's | |
1193 | * vdev guid -- but the label may or may not be on disk yet. | |
1194 | * Fortunately, either version of the label will have the | |
1195 | * same top guid, so if we're a top-level vdev, we can | |
1196 | * safely compare to that instead. | |
1197 | */ | |
34dc7c2f | 1198 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, |
b128c09f BB |
1199 | &guid) != 0 || |
1200 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, | |
1201 | &top_guid) != 0 || | |
1202 | (vd->vdev_guid != guid && | |
1203 | (vd->vdev_guid != top_guid || vd != vd->vdev_top))) { | |
34dc7c2f BB |
1204 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
1205 | VDEV_AUX_CORRUPT_DATA); | |
1206 | nvlist_free(label); | |
1207 | return (0); | |
1208 | } | |
1209 | ||
1210 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1211 | &state) != 0) { | |
1212 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1213 | VDEV_AUX_CORRUPT_DATA); | |
1214 | nvlist_free(label); | |
1215 | return (0); | |
1216 | } | |
1217 | ||
1218 | nvlist_free(label); | |
1219 | ||
1220 | if (spa->spa_load_state == SPA_LOAD_OPEN && | |
1221 | state != POOL_STATE_ACTIVE) | |
1222 | return (EBADF); | |
34dc7c2f | 1223 | |
b128c09f BB |
1224 | /* |
1225 | * If we were able to open and validate a vdev that was | |
1226 | * previously marked permanently unavailable, clear that state | |
1227 | * now. | |
1228 | */ | |
1229 | if (vd->vdev_not_present) | |
1230 | vd->vdev_not_present = 0; | |
1231 | } | |
34dc7c2f BB |
1232 | |
1233 | return (0); | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Close a virtual device. | |
1238 | */ | |
1239 | void | |
1240 | vdev_close(vdev_t *vd) | |
1241 | { | |
fb5f0bc8 BB |
1242 | spa_t *spa = vd->vdev_spa; |
1243 | ||
1244 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1245 | ||
34dc7c2f BB |
1246 | vd->vdev_ops->vdev_op_close(vd); |
1247 | ||
1248 | vdev_cache_purge(vd); | |
1249 | ||
1250 | /* | |
9babb374 | 1251 | * We record the previous state before we close it, so that if we are |
34dc7c2f BB |
1252 | * doing a reopen(), we don't generate FMA ereports if we notice that |
1253 | * it's still faulted. | |
1254 | */ | |
1255 | vd->vdev_prevstate = vd->vdev_state; | |
1256 | ||
1257 | if (vd->vdev_offline) | |
1258 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
1259 | else | |
1260 | vd->vdev_state = VDEV_STATE_CLOSED; | |
1261 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
1262 | } | |
1263 | ||
1264 | void | |
1265 | vdev_reopen(vdev_t *vd) | |
1266 | { | |
1267 | spa_t *spa = vd->vdev_spa; | |
1268 | ||
b128c09f | 1269 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
34dc7c2f BB |
1270 | |
1271 | vdev_close(vd); | |
1272 | (void) vdev_open(vd); | |
1273 | ||
1274 | /* | |
1275 | * Call vdev_validate() here to make sure we have the same device. | |
1276 | * Otherwise, a device with an invalid label could be successfully | |
1277 | * opened in response to vdev_reopen(). | |
1278 | */ | |
b128c09f BB |
1279 | if (vd->vdev_aux) { |
1280 | (void) vdev_validate_aux(vd); | |
1281 | if (vdev_readable(vd) && vdev_writeable(vd) && | |
9babb374 BB |
1282 | vd->vdev_aux == &spa->spa_l2cache && |
1283 | !l2arc_vdev_present(vd)) | |
1284 | l2arc_add_vdev(spa, vd); | |
b128c09f BB |
1285 | } else { |
1286 | (void) vdev_validate(vd); | |
1287 | } | |
34dc7c2f BB |
1288 | |
1289 | /* | |
1290 | * Reassess parent vdev's health. | |
1291 | */ | |
1292 | vdev_propagate_state(vd); | |
1293 | } | |
1294 | ||
1295 | int | |
1296 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
1297 | { | |
1298 | int error; | |
1299 | ||
1300 | /* | |
1301 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
1302 | * For a create, however, we want to fail the request if | |
1303 | * there are any components we can't open. | |
1304 | */ | |
1305 | error = vdev_open(vd); | |
1306 | ||
1307 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
1308 | vdev_close(vd); | |
1309 | return (error ? error : ENXIO); | |
1310 | } | |
1311 | ||
1312 | /* | |
1313 | * Recursively initialize all labels. | |
1314 | */ | |
1315 | if ((error = vdev_label_init(vd, txg, isreplacing ? | |
1316 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { | |
1317 | vdev_close(vd); | |
1318 | return (error); | |
1319 | } | |
1320 | ||
1321 | return (0); | |
1322 | } | |
1323 | ||
34dc7c2f | 1324 | void |
9babb374 | 1325 | vdev_metaslab_set_size(vdev_t *vd) |
34dc7c2f BB |
1326 | { |
1327 | /* | |
1328 | * Aim for roughly 200 metaslabs per vdev. | |
1329 | */ | |
1330 | vd->vdev_ms_shift = highbit(vd->vdev_asize / 200); | |
1331 | vd->vdev_ms_shift = MAX(vd->vdev_ms_shift, SPA_MAXBLOCKSHIFT); | |
34dc7c2f BB |
1332 | } |
1333 | ||
1334 | void | |
1335 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
1336 | { | |
1337 | ASSERT(vd == vd->vdev_top); | |
1338 | ASSERT(ISP2(flags)); | |
1339 | ||
1340 | if (flags & VDD_METASLAB) | |
1341 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
1342 | ||
1343 | if (flags & VDD_DTL) | |
1344 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
1345 | ||
1346 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
1347 | } | |
1348 | ||
fb5f0bc8 BB |
1349 | /* |
1350 | * DTLs. | |
1351 | * | |
1352 | * A vdev's DTL (dirty time log) is the set of transaction groups for which | |
1353 | * the vdev has less than perfect replication. There are three kinds of DTL: | |
1354 | * | |
1355 | * DTL_MISSING: txgs for which the vdev has no valid copies of the data | |
1356 | * | |
1357 | * DTL_PARTIAL: txgs for which data is available, but not fully replicated | |
1358 | * | |
1359 | * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon | |
1360 | * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of | |
1361 | * txgs that was scrubbed. | |
1362 | * | |
1363 | * DTL_OUTAGE: txgs which cannot currently be read, whether due to | |
1364 | * persistent errors or just some device being offline. | |
1365 | * Unlike the other three, the DTL_OUTAGE map is not generally | |
1366 | * maintained; it's only computed when needed, typically to | |
1367 | * determine whether a device can be detached. | |
1368 | * | |
1369 | * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device | |
1370 | * either has the data or it doesn't. | |
1371 | * | |
1372 | * For interior vdevs such as mirror and RAID-Z the picture is more complex. | |
1373 | * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because | |
1374 | * if any child is less than fully replicated, then so is its parent. | |
1375 | * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, | |
1376 | * comprising only those txgs which appear in 'maxfaults' or more children; | |
1377 | * those are the txgs we don't have enough replication to read. For example, | |
1378 | * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); | |
1379 | * thus, its DTL_MISSING consists of the set of txgs that appear in more than | |
1380 | * two child DTL_MISSING maps. | |
1381 | * | |
1382 | * It should be clear from the above that to compute the DTLs and outage maps | |
1383 | * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. | |
1384 | * Therefore, that is all we keep on disk. When loading the pool, or after | |
1385 | * a configuration change, we generate all other DTLs from first principles. | |
1386 | */ | |
34dc7c2f | 1387 | void |
fb5f0bc8 | 1388 | vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) |
34dc7c2f | 1389 | { |
fb5f0bc8 BB |
1390 | space_map_t *sm = &vd->vdev_dtl[t]; |
1391 | ||
1392 | ASSERT(t < DTL_TYPES); | |
1393 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
1394 | ||
34dc7c2f BB |
1395 | mutex_enter(sm->sm_lock); |
1396 | if (!space_map_contains(sm, txg, size)) | |
1397 | space_map_add(sm, txg, size); | |
1398 | mutex_exit(sm->sm_lock); | |
1399 | } | |
1400 | ||
fb5f0bc8 BB |
1401 | boolean_t |
1402 | vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) | |
34dc7c2f | 1403 | { |
fb5f0bc8 BB |
1404 | space_map_t *sm = &vd->vdev_dtl[t]; |
1405 | boolean_t dirty = B_FALSE; | |
34dc7c2f | 1406 | |
fb5f0bc8 BB |
1407 | ASSERT(t < DTL_TYPES); |
1408 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
34dc7c2f BB |
1409 | |
1410 | mutex_enter(sm->sm_lock); | |
fb5f0bc8 BB |
1411 | if (sm->sm_space != 0) |
1412 | dirty = space_map_contains(sm, txg, size); | |
34dc7c2f BB |
1413 | mutex_exit(sm->sm_lock); |
1414 | ||
1415 | return (dirty); | |
1416 | } | |
1417 | ||
fb5f0bc8 BB |
1418 | boolean_t |
1419 | vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) | |
1420 | { | |
1421 | space_map_t *sm = &vd->vdev_dtl[t]; | |
1422 | boolean_t empty; | |
1423 | ||
1424 | mutex_enter(sm->sm_lock); | |
1425 | empty = (sm->sm_space == 0); | |
1426 | mutex_exit(sm->sm_lock); | |
1427 | ||
1428 | return (empty); | |
1429 | } | |
1430 | ||
34dc7c2f BB |
1431 | /* |
1432 | * Reassess DTLs after a config change or scrub completion. | |
1433 | */ | |
1434 | void | |
1435 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
1436 | { | |
1437 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 BB |
1438 | avl_tree_t reftree; |
1439 | int minref; | |
34dc7c2f | 1440 | |
fb5f0bc8 | 1441 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 1442 | |
fb5f0bc8 BB |
1443 | for (int c = 0; c < vd->vdev_children; c++) |
1444 | vdev_dtl_reassess(vd->vdev_child[c], txg, | |
1445 | scrub_txg, scrub_done); | |
1446 | ||
1447 | if (vd == spa->spa_root_vdev) | |
1448 | return; | |
1449 | ||
1450 | if (vd->vdev_ops->vdev_op_leaf) { | |
34dc7c2f | 1451 | mutex_enter(&vd->vdev_dtl_lock); |
b128c09f BB |
1452 | if (scrub_txg != 0 && |
1453 | (spa->spa_scrub_started || spa->spa_scrub_errors == 0)) { | |
1454 | /* XXX should check scrub_done? */ | |
1455 | /* | |
1456 | * We completed a scrub up to scrub_txg. If we | |
1457 | * did it without rebooting, then the scrub dtl | |
1458 | * will be valid, so excise the old region and | |
1459 | * fold in the scrub dtl. Otherwise, leave the | |
1460 | * dtl as-is if there was an error. | |
fb5f0bc8 BB |
1461 | * |
1462 | * There's little trick here: to excise the beginning | |
1463 | * of the DTL_MISSING map, we put it into a reference | |
1464 | * tree and then add a segment with refcnt -1 that | |
1465 | * covers the range [0, scrub_txg). This means | |
1466 | * that each txg in that range has refcnt -1 or 0. | |
1467 | * We then add DTL_SCRUB with a refcnt of 2, so that | |
1468 | * entries in the range [0, scrub_txg) will have a | |
1469 | * positive refcnt -- either 1 or 2. We then convert | |
1470 | * the reference tree into the new DTL_MISSING map. | |
b128c09f | 1471 | */ |
fb5f0bc8 BB |
1472 | space_map_ref_create(&reftree); |
1473 | space_map_ref_add_map(&reftree, | |
1474 | &vd->vdev_dtl[DTL_MISSING], 1); | |
1475 | space_map_ref_add_seg(&reftree, 0, scrub_txg, -1); | |
1476 | space_map_ref_add_map(&reftree, | |
1477 | &vd->vdev_dtl[DTL_SCRUB], 2); | |
1478 | space_map_ref_generate_map(&reftree, | |
1479 | &vd->vdev_dtl[DTL_MISSING], 1); | |
1480 | space_map_ref_destroy(&reftree); | |
34dc7c2f | 1481 | } |
fb5f0bc8 BB |
1482 | space_map_vacate(&vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); |
1483 | space_map_walk(&vd->vdev_dtl[DTL_MISSING], | |
1484 | space_map_add, &vd->vdev_dtl[DTL_PARTIAL]); | |
34dc7c2f | 1485 | if (scrub_done) |
fb5f0bc8 BB |
1486 | space_map_vacate(&vd->vdev_dtl[DTL_SCRUB], NULL, NULL); |
1487 | space_map_vacate(&vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); | |
1488 | if (!vdev_readable(vd)) | |
1489 | space_map_add(&vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); | |
1490 | else | |
1491 | space_map_walk(&vd->vdev_dtl[DTL_MISSING], | |
1492 | space_map_add, &vd->vdev_dtl[DTL_OUTAGE]); | |
34dc7c2f | 1493 | mutex_exit(&vd->vdev_dtl_lock); |
b128c09f | 1494 | |
34dc7c2f BB |
1495 | if (txg != 0) |
1496 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
1497 | return; | |
1498 | } | |
1499 | ||
34dc7c2f | 1500 | mutex_enter(&vd->vdev_dtl_lock); |
fb5f0bc8 BB |
1501 | for (int t = 0; t < DTL_TYPES; t++) { |
1502 | if (t == DTL_SCRUB) | |
1503 | continue; /* leaf vdevs only */ | |
1504 | if (t == DTL_PARTIAL) | |
1505 | minref = 1; /* i.e. non-zero */ | |
1506 | else if (vd->vdev_nparity != 0) | |
1507 | minref = vd->vdev_nparity + 1; /* RAID-Z */ | |
1508 | else | |
1509 | minref = vd->vdev_children; /* any kind of mirror */ | |
1510 | space_map_ref_create(&reftree); | |
1511 | for (int c = 0; c < vd->vdev_children; c++) { | |
1512 | vdev_t *cvd = vd->vdev_child[c]; | |
1513 | mutex_enter(&cvd->vdev_dtl_lock); | |
1514 | space_map_ref_add_map(&reftree, &cvd->vdev_dtl[t], 1); | |
1515 | mutex_exit(&cvd->vdev_dtl_lock); | |
1516 | } | |
1517 | space_map_ref_generate_map(&reftree, &vd->vdev_dtl[t], minref); | |
1518 | space_map_ref_destroy(&reftree); | |
34dc7c2f | 1519 | } |
fb5f0bc8 | 1520 | mutex_exit(&vd->vdev_dtl_lock); |
34dc7c2f BB |
1521 | } |
1522 | ||
1523 | static int | |
1524 | vdev_dtl_load(vdev_t *vd) | |
1525 | { | |
1526 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 | 1527 | space_map_obj_t *smo = &vd->vdev_dtl_smo; |
34dc7c2f BB |
1528 | objset_t *mos = spa->spa_meta_objset; |
1529 | dmu_buf_t *db; | |
1530 | int error; | |
1531 | ||
1532 | ASSERT(vd->vdev_children == 0); | |
1533 | ||
1534 | if (smo->smo_object == 0) | |
1535 | return (0); | |
1536 | ||
1537 | if ((error = dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)) != 0) | |
1538 | return (error); | |
1539 | ||
1540 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1541 | bcopy(db->db_data, smo, sizeof (*smo)); | |
1542 | dmu_buf_rele(db, FTAG); | |
1543 | ||
1544 | mutex_enter(&vd->vdev_dtl_lock); | |
fb5f0bc8 BB |
1545 | error = space_map_load(&vd->vdev_dtl[DTL_MISSING], |
1546 | NULL, SM_ALLOC, smo, mos); | |
34dc7c2f BB |
1547 | mutex_exit(&vd->vdev_dtl_lock); |
1548 | ||
1549 | return (error); | |
1550 | } | |
1551 | ||
1552 | void | |
1553 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
1554 | { | |
1555 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 BB |
1556 | space_map_obj_t *smo = &vd->vdev_dtl_smo; |
1557 | space_map_t *sm = &vd->vdev_dtl[DTL_MISSING]; | |
34dc7c2f BB |
1558 | objset_t *mos = spa->spa_meta_objset; |
1559 | space_map_t smsync; | |
1560 | kmutex_t smlock; | |
1561 | dmu_buf_t *db; | |
1562 | dmu_tx_t *tx; | |
1563 | ||
34dc7c2f BB |
1564 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); |
1565 | ||
1566 | if (vd->vdev_detached) { | |
1567 | if (smo->smo_object != 0) { | |
1568 | int err = dmu_object_free(mos, smo->smo_object, tx); | |
1569 | ASSERT3U(err, ==, 0); | |
1570 | smo->smo_object = 0; | |
1571 | } | |
1572 | dmu_tx_commit(tx); | |
34dc7c2f BB |
1573 | return; |
1574 | } | |
1575 | ||
1576 | if (smo->smo_object == 0) { | |
1577 | ASSERT(smo->smo_objsize == 0); | |
1578 | ASSERT(smo->smo_alloc == 0); | |
1579 | smo->smo_object = dmu_object_alloc(mos, | |
1580 | DMU_OT_SPACE_MAP, 1 << SPACE_MAP_BLOCKSHIFT, | |
1581 | DMU_OT_SPACE_MAP_HEADER, sizeof (*smo), tx); | |
1582 | ASSERT(smo->smo_object != 0); | |
1583 | vdev_config_dirty(vd->vdev_top); | |
1584 | } | |
1585 | ||
1586 | mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL); | |
1587 | ||
1588 | space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift, | |
1589 | &smlock); | |
1590 | ||
1591 | mutex_enter(&smlock); | |
1592 | ||
1593 | mutex_enter(&vd->vdev_dtl_lock); | |
1594 | space_map_walk(sm, space_map_add, &smsync); | |
1595 | mutex_exit(&vd->vdev_dtl_lock); | |
1596 | ||
1597 | space_map_truncate(smo, mos, tx); | |
1598 | space_map_sync(&smsync, SM_ALLOC, smo, mos, tx); | |
1599 | ||
1600 | space_map_destroy(&smsync); | |
1601 | ||
1602 | mutex_exit(&smlock); | |
1603 | mutex_destroy(&smlock); | |
1604 | ||
1605 | VERIFY(0 == dmu_bonus_hold(mos, smo->smo_object, FTAG, &db)); | |
1606 | dmu_buf_will_dirty(db, tx); | |
1607 | ASSERT3U(db->db_size, >=, sizeof (*smo)); | |
1608 | bcopy(smo, db->db_data, sizeof (*smo)); | |
1609 | dmu_buf_rele(db, FTAG); | |
1610 | ||
1611 | dmu_tx_commit(tx); | |
1612 | } | |
1613 | ||
fb5f0bc8 BB |
1614 | /* |
1615 | * Determine whether the specified vdev can be offlined/detached/removed | |
1616 | * without losing data. | |
1617 | */ | |
1618 | boolean_t | |
1619 | vdev_dtl_required(vdev_t *vd) | |
1620 | { | |
1621 | spa_t *spa = vd->vdev_spa; | |
1622 | vdev_t *tvd = vd->vdev_top; | |
1623 | uint8_t cant_read = vd->vdev_cant_read; | |
1624 | boolean_t required; | |
1625 | ||
1626 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
1627 | ||
1628 | if (vd == spa->spa_root_vdev || vd == tvd) | |
1629 | return (B_TRUE); | |
1630 | ||
1631 | /* | |
1632 | * Temporarily mark the device as unreadable, and then determine | |
1633 | * whether this results in any DTL outages in the top-level vdev. | |
1634 | * If not, we can safely offline/detach/remove the device. | |
1635 | */ | |
1636 | vd->vdev_cant_read = B_TRUE; | |
1637 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
1638 | required = !vdev_dtl_empty(tvd, DTL_OUTAGE); | |
1639 | vd->vdev_cant_read = cant_read; | |
1640 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
1641 | ||
1642 | return (required); | |
1643 | } | |
1644 | ||
b128c09f BB |
1645 | /* |
1646 | * Determine if resilver is needed, and if so the txg range. | |
1647 | */ | |
1648 | boolean_t | |
1649 | vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) | |
1650 | { | |
1651 | boolean_t needed = B_FALSE; | |
1652 | uint64_t thismin = UINT64_MAX; | |
1653 | uint64_t thismax = 0; | |
1654 | ||
1655 | if (vd->vdev_children == 0) { | |
1656 | mutex_enter(&vd->vdev_dtl_lock); | |
fb5f0bc8 BB |
1657 | if (vd->vdev_dtl[DTL_MISSING].sm_space != 0 && |
1658 | vdev_writeable(vd)) { | |
b128c09f BB |
1659 | space_seg_t *ss; |
1660 | ||
fb5f0bc8 | 1661 | ss = avl_first(&vd->vdev_dtl[DTL_MISSING].sm_root); |
b128c09f | 1662 | thismin = ss->ss_start - 1; |
fb5f0bc8 | 1663 | ss = avl_last(&vd->vdev_dtl[DTL_MISSING].sm_root); |
b128c09f BB |
1664 | thismax = ss->ss_end; |
1665 | needed = B_TRUE; | |
1666 | } | |
1667 | mutex_exit(&vd->vdev_dtl_lock); | |
1668 | } else { | |
fb5f0bc8 | 1669 | for (int c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
1670 | vdev_t *cvd = vd->vdev_child[c]; |
1671 | uint64_t cmin, cmax; | |
1672 | ||
1673 | if (vdev_resilver_needed(cvd, &cmin, &cmax)) { | |
1674 | thismin = MIN(thismin, cmin); | |
1675 | thismax = MAX(thismax, cmax); | |
1676 | needed = B_TRUE; | |
1677 | } | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | if (needed && minp) { | |
1682 | *minp = thismin; | |
1683 | *maxp = thismax; | |
1684 | } | |
1685 | return (needed); | |
1686 | } | |
1687 | ||
34dc7c2f BB |
1688 | void |
1689 | vdev_load(vdev_t *vd) | |
1690 | { | |
34dc7c2f BB |
1691 | /* |
1692 | * Recursively load all children. | |
1693 | */ | |
fb5f0bc8 | 1694 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
1695 | vdev_load(vd->vdev_child[c]); |
1696 | ||
1697 | /* | |
1698 | * If this is a top-level vdev, initialize its metaslabs. | |
1699 | */ | |
1700 | if (vd == vd->vdev_top && | |
1701 | (vd->vdev_ashift == 0 || vd->vdev_asize == 0 || | |
1702 | vdev_metaslab_init(vd, 0) != 0)) | |
1703 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1704 | VDEV_AUX_CORRUPT_DATA); | |
1705 | ||
1706 | /* | |
1707 | * If this is a leaf vdev, load its DTL. | |
1708 | */ | |
1709 | if (vd->vdev_ops->vdev_op_leaf && vdev_dtl_load(vd) != 0) | |
1710 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1711 | VDEV_AUX_CORRUPT_DATA); | |
1712 | } | |
1713 | ||
1714 | /* | |
1715 | * The special vdev case is used for hot spares and l2cache devices. Its | |
1716 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
1717 | * we make sure that we can open the underlying device, then try to read the | |
1718 | * label, and make sure that the label is sane and that it hasn't been | |
1719 | * repurposed to another pool. | |
1720 | */ | |
1721 | int | |
1722 | vdev_validate_aux(vdev_t *vd) | |
1723 | { | |
1724 | nvlist_t *label; | |
1725 | uint64_t guid, version; | |
1726 | uint64_t state; | |
1727 | ||
b128c09f BB |
1728 | if (!vdev_readable(vd)) |
1729 | return (0); | |
1730 | ||
34dc7c2f BB |
1731 | if ((label = vdev_label_read_config(vd)) == NULL) { |
1732 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1733 | VDEV_AUX_CORRUPT_DATA); | |
1734 | return (-1); | |
1735 | } | |
1736 | ||
1737 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
1738 | version > SPA_VERSION || | |
1739 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || | |
1740 | guid != vd->vdev_guid || | |
1741 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
1742 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1743 | VDEV_AUX_CORRUPT_DATA); | |
1744 | nvlist_free(label); | |
1745 | return (-1); | |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * We don't actually check the pool state here. If it's in fact in | |
1750 | * use by another pool, we update this fact on the fly when requested. | |
1751 | */ | |
1752 | nvlist_free(label); | |
1753 | return (0); | |
1754 | } | |
1755 | ||
1756 | void | |
1757 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
1758 | { | |
1759 | metaslab_t *msp; | |
1760 | ||
34dc7c2f BB |
1761 | while (msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg))) |
1762 | metaslab_sync_done(msp, txg); | |
1763 | } | |
1764 | ||
1765 | void | |
1766 | vdev_sync(vdev_t *vd, uint64_t txg) | |
1767 | { | |
1768 | spa_t *spa = vd->vdev_spa; | |
1769 | vdev_t *lvd; | |
1770 | metaslab_t *msp; | |
1771 | dmu_tx_t *tx; | |
1772 | ||
34dc7c2f BB |
1773 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0) { |
1774 | ASSERT(vd == vd->vdev_top); | |
1775 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
1776 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
1777 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
1778 | ASSERT(vd->vdev_ms_array != 0); | |
1779 | vdev_config_dirty(vd); | |
1780 | dmu_tx_commit(tx); | |
1781 | } | |
1782 | ||
1783 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { | |
1784 | metaslab_sync(msp, txg); | |
1785 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
1786 | } | |
1787 | ||
1788 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
1789 | vdev_dtl_sync(lvd, txg); | |
1790 | ||
1791 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); | |
1792 | } | |
1793 | ||
1794 | uint64_t | |
1795 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
1796 | { | |
1797 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
1798 | } | |
1799 | ||
34dc7c2f BB |
1800 | /* |
1801 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
1802 | * not be opened, and no I/O is attempted. | |
1803 | */ | |
1804 | int | |
1805 | vdev_fault(spa_t *spa, uint64_t guid) | |
1806 | { | |
b128c09f | 1807 | vdev_t *vd; |
34dc7c2f | 1808 | |
b128c09f | 1809 | spa_vdev_state_enter(spa); |
34dc7c2f | 1810 | |
b128c09f BB |
1811 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1812 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 1813 | |
34dc7c2f | 1814 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 1815 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1816 | |
1817 | /* | |
1818 | * Faulted state takes precedence over degraded. | |
1819 | */ | |
1820 | vd->vdev_faulted = 1ULL; | |
1821 | vd->vdev_degraded = 0ULL; | |
b128c09f | 1822 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, VDEV_AUX_ERR_EXCEEDED); |
34dc7c2f BB |
1823 | |
1824 | /* | |
b128c09f | 1825 | * If marking the vdev as faulted cause the top-level vdev to become |
34dc7c2f BB |
1826 | * unavailable, then back off and simply mark the vdev as degraded |
1827 | * instead. | |
1828 | */ | |
b128c09f | 1829 | if (vdev_is_dead(vd->vdev_top) && vd->vdev_aux == NULL) { |
34dc7c2f BB |
1830 | vd->vdev_degraded = 1ULL; |
1831 | vd->vdev_faulted = 0ULL; | |
1832 | ||
1833 | /* | |
1834 | * If we reopen the device and it's not dead, only then do we | |
1835 | * mark it degraded. | |
1836 | */ | |
1837 | vdev_reopen(vd); | |
1838 | ||
1839 | if (vdev_readable(vd)) { | |
1840 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1841 | VDEV_AUX_ERR_EXCEEDED); | |
1842 | } | |
1843 | } | |
1844 | ||
b128c09f | 1845 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1846 | } |
1847 | ||
1848 | /* | |
1849 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
1850 | * user that something is wrong. The vdev continues to operate as normal as far | |
1851 | * as I/O is concerned. | |
1852 | */ | |
1853 | int | |
1854 | vdev_degrade(spa_t *spa, uint64_t guid) | |
1855 | { | |
b128c09f | 1856 | vdev_t *vd; |
34dc7c2f | 1857 | |
b128c09f | 1858 | spa_vdev_state_enter(spa); |
34dc7c2f | 1859 | |
b128c09f BB |
1860 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1861 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 1862 | |
34dc7c2f | 1863 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 1864 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
1865 | |
1866 | /* | |
1867 | * If the vdev is already faulted, then don't do anything. | |
1868 | */ | |
b128c09f BB |
1869 | if (vd->vdev_faulted || vd->vdev_degraded) |
1870 | return (spa_vdev_state_exit(spa, NULL, 0)); | |
34dc7c2f BB |
1871 | |
1872 | vd->vdev_degraded = 1ULL; | |
1873 | if (!vdev_is_dead(vd)) | |
1874 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
1875 | VDEV_AUX_ERR_EXCEEDED); | |
34dc7c2f | 1876 | |
b128c09f | 1877 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1878 | } |
1879 | ||
1880 | /* | |
1881 | * Online the given vdev. If 'unspare' is set, it implies two things. First, | |
1882 | * any attached spare device should be detached when the device finishes | |
1883 | * resilvering. Second, the online should be treated like a 'test' online case, | |
1884 | * so no FMA events are generated if the device fails to open. | |
1885 | */ | |
1886 | int | |
b128c09f | 1887 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) |
34dc7c2f | 1888 | { |
9babb374 | 1889 | vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; |
34dc7c2f | 1890 | |
b128c09f | 1891 | spa_vdev_state_enter(spa); |
34dc7c2f | 1892 | |
b128c09f BB |
1893 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1894 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
1895 | |
1896 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 1897 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 1898 | |
9babb374 | 1899 | tvd = vd->vdev_top; |
34dc7c2f BB |
1900 | vd->vdev_offline = B_FALSE; |
1901 | vd->vdev_tmpoffline = B_FALSE; | |
b128c09f BB |
1902 | vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); |
1903 | vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); | |
9babb374 BB |
1904 | |
1905 | /* XXX - L2ARC 1.0 does not support expansion */ | |
1906 | if (!vd->vdev_aux) { | |
1907 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
1908 | pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); | |
1909 | } | |
1910 | ||
1911 | vdev_reopen(tvd); | |
34dc7c2f BB |
1912 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; |
1913 | ||
9babb374 BB |
1914 | if (!vd->vdev_aux) { |
1915 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
1916 | pvd->vdev_expanding = B_FALSE; | |
1917 | } | |
1918 | ||
34dc7c2f BB |
1919 | if (newstate) |
1920 | *newstate = vd->vdev_state; | |
1921 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
1922 | !vdev_is_dead(vd) && vd->vdev_parent && | |
1923 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
1924 | vd->vdev_parent->vdev_child[0] == vd) | |
1925 | vd->vdev_unspare = B_TRUE; | |
1926 | ||
9babb374 BB |
1927 | if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { |
1928 | ||
1929 | /* XXX - L2ARC 1.0 does not support expansion */ | |
1930 | if (vd->vdev_aux) | |
1931 | return (spa_vdev_state_exit(spa, vd, ENOTSUP)); | |
1932 | spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); | |
1933 | } | |
fb5f0bc8 | 1934 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
1935 | } |
1936 | ||
1937 | int | |
1938 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
1939 | { | |
9babb374 BB |
1940 | vdev_t *vd, *tvd; |
1941 | int error; | |
34dc7c2f | 1942 | |
b128c09f | 1943 | spa_vdev_state_enter(spa); |
34dc7c2f | 1944 | |
b128c09f BB |
1945 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
1946 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
1947 | |
1948 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 1949 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 1950 | |
9babb374 BB |
1951 | tvd = vd->vdev_top; |
1952 | ||
34dc7c2f BB |
1953 | /* |
1954 | * If the device isn't already offline, try to offline it. | |
1955 | */ | |
1956 | if (!vd->vdev_offline) { | |
1957 | /* | |
fb5f0bc8 | 1958 | * If this device has the only valid copy of some data, |
9babb374 BB |
1959 | * don't allow it to be offlined. Log devices are always |
1960 | * expendable. | |
34dc7c2f | 1961 | */ |
9babb374 BB |
1962 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && |
1963 | vdev_dtl_required(vd)) | |
b128c09f | 1964 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f BB |
1965 | |
1966 | /* | |
1967 | * Offline this device and reopen its top-level vdev. | |
9babb374 BB |
1968 | * If the top-level vdev is a log device then just offline |
1969 | * it. Otherwise, if this action results in the top-level | |
1970 | * vdev becoming unusable, undo it and fail the request. | |
34dc7c2f BB |
1971 | */ |
1972 | vd->vdev_offline = B_TRUE; | |
9babb374 BB |
1973 | vdev_reopen(tvd); |
1974 | ||
1975 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && | |
1976 | vdev_is_dead(tvd)) { | |
34dc7c2f | 1977 | vd->vdev_offline = B_FALSE; |
9babb374 | 1978 | vdev_reopen(tvd); |
b128c09f | 1979 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f BB |
1980 | } |
1981 | } | |
1982 | ||
b128c09f | 1983 | vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); |
34dc7c2f | 1984 | |
9babb374 BB |
1985 | if (!tvd->vdev_islog || !vdev_is_dead(tvd)) |
1986 | return (spa_vdev_state_exit(spa, vd, 0)); | |
1987 | ||
1988 | (void) spa_vdev_state_exit(spa, vd, 0); | |
1989 | ||
1990 | error = dmu_objset_find(spa_name(spa), zil_vdev_offline, | |
1991 | NULL, DS_FIND_CHILDREN); | |
1992 | if (error) { | |
1993 | (void) vdev_online(spa, guid, 0, NULL); | |
1994 | return (error); | |
1995 | } | |
1996 | /* | |
1997 | * If we successfully offlined the log device then we need to | |
1998 | * sync out the current txg so that the "stubby" block can be | |
1999 | * removed by zil_sync(). | |
2000 | */ | |
2001 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
2002 | return (0); | |
34dc7c2f BB |
2003 | } |
2004 | ||
2005 | /* | |
2006 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
2007 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
2008 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
34dc7c2f BB |
2009 | */ |
2010 | void | |
b128c09f | 2011 | vdev_clear(spa_t *spa, vdev_t *vd) |
34dc7c2f | 2012 | { |
b128c09f BB |
2013 | vdev_t *rvd = spa->spa_root_vdev; |
2014 | ||
2015 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
2016 | |
2017 | if (vd == NULL) | |
b128c09f | 2018 | vd = rvd; |
34dc7c2f BB |
2019 | |
2020 | vd->vdev_stat.vs_read_errors = 0; | |
2021 | vd->vdev_stat.vs_write_errors = 0; | |
2022 | vd->vdev_stat.vs_checksum_errors = 0; | |
34dc7c2f | 2023 | |
b128c09f BB |
2024 | for (int c = 0; c < vd->vdev_children; c++) |
2025 | vdev_clear(spa, vd->vdev_child[c]); | |
34dc7c2f BB |
2026 | |
2027 | /* | |
b128c09f BB |
2028 | * If we're in the FAULTED state or have experienced failed I/O, then |
2029 | * clear the persistent state and attempt to reopen the device. We | |
2030 | * also mark the vdev config dirty, so that the new faulted state is | |
2031 | * written out to disk. | |
34dc7c2f | 2032 | */ |
b128c09f BB |
2033 | if (vd->vdev_faulted || vd->vdev_degraded || |
2034 | !vdev_readable(vd) || !vdev_writeable(vd)) { | |
2035 | ||
34dc7c2f | 2036 | vd->vdev_faulted = vd->vdev_degraded = 0; |
b128c09f BB |
2037 | vd->vdev_cant_read = B_FALSE; |
2038 | vd->vdev_cant_write = B_FALSE; | |
2039 | ||
34dc7c2f | 2040 | vdev_reopen(vd); |
34dc7c2f | 2041 | |
b128c09f BB |
2042 | if (vd != rvd) |
2043 | vdev_state_dirty(vd->vdev_top); | |
2044 | ||
2045 | if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) | |
34dc7c2f BB |
2046 | spa_async_request(spa, SPA_ASYNC_RESILVER); |
2047 | ||
2048 | spa_event_notify(spa, vd, ESC_ZFS_VDEV_CLEAR); | |
2049 | } | |
2050 | } | |
2051 | ||
b128c09f BB |
2052 | boolean_t |
2053 | vdev_is_dead(vdev_t *vd) | |
2054 | { | |
2055 | return (vd->vdev_state < VDEV_STATE_DEGRADED); | |
2056 | } | |
2057 | ||
2058 | boolean_t | |
34dc7c2f BB |
2059 | vdev_readable(vdev_t *vd) |
2060 | { | |
b128c09f | 2061 | return (!vdev_is_dead(vd) && !vd->vdev_cant_read); |
34dc7c2f BB |
2062 | } |
2063 | ||
b128c09f | 2064 | boolean_t |
34dc7c2f BB |
2065 | vdev_writeable(vdev_t *vd) |
2066 | { | |
b128c09f | 2067 | return (!vdev_is_dead(vd) && !vd->vdev_cant_write); |
34dc7c2f BB |
2068 | } |
2069 | ||
b128c09f BB |
2070 | boolean_t |
2071 | vdev_allocatable(vdev_t *vd) | |
34dc7c2f | 2072 | { |
fb5f0bc8 BB |
2073 | uint64_t state = vd->vdev_state; |
2074 | ||
b128c09f | 2075 | /* |
fb5f0bc8 | 2076 | * We currently allow allocations from vdevs which may be in the |
b128c09f BB |
2077 | * process of reopening (i.e. VDEV_STATE_CLOSED). If the device |
2078 | * fails to reopen then we'll catch it later when we're holding | |
fb5f0bc8 BB |
2079 | * the proper locks. Note that we have to get the vdev state |
2080 | * in a local variable because although it changes atomically, | |
2081 | * we're asking two separate questions about it. | |
b128c09f | 2082 | */ |
fb5f0bc8 | 2083 | return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && |
b128c09f | 2084 | !vd->vdev_cant_write); |
34dc7c2f BB |
2085 | } |
2086 | ||
b128c09f BB |
2087 | boolean_t |
2088 | vdev_accessible(vdev_t *vd, zio_t *zio) | |
34dc7c2f | 2089 | { |
b128c09f | 2090 | ASSERT(zio->io_vd == vd); |
34dc7c2f | 2091 | |
b128c09f BB |
2092 | if (vdev_is_dead(vd) || vd->vdev_remove_wanted) |
2093 | return (B_FALSE); | |
34dc7c2f | 2094 | |
b128c09f BB |
2095 | if (zio->io_type == ZIO_TYPE_READ) |
2096 | return (!vd->vdev_cant_read); | |
34dc7c2f | 2097 | |
b128c09f BB |
2098 | if (zio->io_type == ZIO_TYPE_WRITE) |
2099 | return (!vd->vdev_cant_write); | |
34dc7c2f | 2100 | |
b128c09f | 2101 | return (B_TRUE); |
34dc7c2f BB |
2102 | } |
2103 | ||
2104 | /* | |
2105 | * Get statistics for the given vdev. | |
2106 | */ | |
2107 | void | |
2108 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
2109 | { | |
2110 | vdev_t *rvd = vd->vdev_spa->spa_root_vdev; | |
34dc7c2f BB |
2111 | |
2112 | mutex_enter(&vd->vdev_stat_lock); | |
2113 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
b128c09f | 2114 | vs->vs_scrub_errors = vd->vdev_spa->spa_scrub_errors; |
34dc7c2f BB |
2115 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; |
2116 | vs->vs_state = vd->vdev_state; | |
9babb374 BB |
2117 | vs->vs_rsize = vdev_get_min_asize(vd); |
2118 | if (vd->vdev_ops->vdev_op_leaf) | |
2119 | vs->vs_rsize += VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE; | |
34dc7c2f BB |
2120 | mutex_exit(&vd->vdev_stat_lock); |
2121 | ||
2122 | /* | |
2123 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
2124 | * over all top-level vdevs (i.e. the direct children of the root). | |
2125 | */ | |
2126 | if (vd == rvd) { | |
b128c09f | 2127 | for (int c = 0; c < rvd->vdev_children; c++) { |
34dc7c2f BB |
2128 | vdev_t *cvd = rvd->vdev_child[c]; |
2129 | vdev_stat_t *cvs = &cvd->vdev_stat; | |
2130 | ||
2131 | mutex_enter(&vd->vdev_stat_lock); | |
b128c09f | 2132 | for (int t = 0; t < ZIO_TYPES; t++) { |
34dc7c2f BB |
2133 | vs->vs_ops[t] += cvs->vs_ops[t]; |
2134 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
2135 | } | |
34dc7c2f | 2136 | vs->vs_scrub_examined += cvs->vs_scrub_examined; |
34dc7c2f BB |
2137 | mutex_exit(&vd->vdev_stat_lock); |
2138 | } | |
2139 | } | |
2140 | } | |
2141 | ||
2142 | void | |
2143 | vdev_clear_stats(vdev_t *vd) | |
2144 | { | |
2145 | mutex_enter(&vd->vdev_stat_lock); | |
2146 | vd->vdev_stat.vs_space = 0; | |
2147 | vd->vdev_stat.vs_dspace = 0; | |
2148 | vd->vdev_stat.vs_alloc = 0; | |
2149 | mutex_exit(&vd->vdev_stat_lock); | |
2150 | } | |
2151 | ||
2152 | void | |
b128c09f | 2153 | vdev_stat_update(zio_t *zio, uint64_t psize) |
34dc7c2f | 2154 | { |
fb5f0bc8 BB |
2155 | spa_t *spa = zio->io_spa; |
2156 | vdev_t *rvd = spa->spa_root_vdev; | |
b128c09f | 2157 | vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; |
34dc7c2f BB |
2158 | vdev_t *pvd; |
2159 | uint64_t txg = zio->io_txg; | |
2160 | vdev_stat_t *vs = &vd->vdev_stat; | |
2161 | zio_type_t type = zio->io_type; | |
2162 | int flags = zio->io_flags; | |
2163 | ||
b128c09f BB |
2164 | /* |
2165 | * If this i/o is a gang leader, it didn't do any actual work. | |
2166 | */ | |
2167 | if (zio->io_gang_tree) | |
2168 | return; | |
2169 | ||
34dc7c2f | 2170 | if (zio->io_error == 0) { |
b128c09f BB |
2171 | /* |
2172 | * If this is a root i/o, don't count it -- we've already | |
2173 | * counted the top-level vdevs, and vdev_get_stats() will | |
2174 | * aggregate them when asked. This reduces contention on | |
2175 | * the root vdev_stat_lock and implicitly handles blocks | |
2176 | * that compress away to holes, for which there is no i/o. | |
2177 | * (Holes never create vdev children, so all the counters | |
2178 | * remain zero, which is what we want.) | |
2179 | * | |
2180 | * Note: this only applies to successful i/o (io_error == 0) | |
2181 | * because unlike i/o counts, errors are not additive. | |
2182 | * When reading a ditto block, for example, failure of | |
2183 | * one top-level vdev does not imply a root-level error. | |
2184 | */ | |
2185 | if (vd == rvd) | |
2186 | return; | |
2187 | ||
2188 | ASSERT(vd == zio->io_vd); | |
fb5f0bc8 BB |
2189 | |
2190 | if (flags & ZIO_FLAG_IO_BYPASS) | |
2191 | return; | |
2192 | ||
2193 | mutex_enter(&vd->vdev_stat_lock); | |
2194 | ||
b128c09f | 2195 | if (flags & ZIO_FLAG_IO_REPAIR) { |
34dc7c2f | 2196 | if (flags & ZIO_FLAG_SCRUB_THREAD) |
b128c09f | 2197 | vs->vs_scrub_repaired += psize; |
fb5f0bc8 | 2198 | if (flags & ZIO_FLAG_SELF_HEAL) |
b128c09f | 2199 | vs->vs_self_healed += psize; |
34dc7c2f | 2200 | } |
fb5f0bc8 BB |
2201 | |
2202 | vs->vs_ops[type]++; | |
2203 | vs->vs_bytes[type] += psize; | |
2204 | ||
2205 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f BB |
2206 | return; |
2207 | } | |
2208 | ||
2209 | if (flags & ZIO_FLAG_SPECULATIVE) | |
2210 | return; | |
2211 | ||
9babb374 BB |
2212 | /* |
2213 | * If this is an I/O error that is going to be retried, then ignore the | |
2214 | * error. Otherwise, the user may interpret B_FAILFAST I/O errors as | |
2215 | * hard errors, when in reality they can happen for any number of | |
2216 | * innocuous reasons (bus resets, MPxIO link failure, etc). | |
2217 | */ | |
2218 | if (zio->io_error == EIO && | |
2219 | !(zio->io_flags & ZIO_FLAG_IO_RETRY)) | |
2220 | return; | |
2221 | ||
b128c09f | 2222 | mutex_enter(&vd->vdev_stat_lock); |
9babb374 | 2223 | if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { |
b128c09f BB |
2224 | if (zio->io_error == ECKSUM) |
2225 | vs->vs_checksum_errors++; | |
2226 | else | |
2227 | vs->vs_read_errors++; | |
34dc7c2f | 2228 | } |
9babb374 | 2229 | if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) |
b128c09f BB |
2230 | vs->vs_write_errors++; |
2231 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f | 2232 | |
fb5f0bc8 BB |
2233 | if (type == ZIO_TYPE_WRITE && txg != 0 && |
2234 | (!(flags & ZIO_FLAG_IO_REPAIR) || | |
2235 | (flags & ZIO_FLAG_SCRUB_THREAD))) { | |
2236 | /* | |
2237 | * This is either a normal write (not a repair), or it's a | |
2238 | * repair induced by the scrub thread. In the normal case, | |
2239 | * we commit the DTL change in the same txg as the block | |
2240 | * was born. In the scrub-induced repair case, we know that | |
2241 | * scrubs run in first-pass syncing context, so we commit | |
2242 | * the DTL change in spa->spa_syncing_txg. | |
2243 | * | |
2244 | * We currently do not make DTL entries for failed spontaneous | |
2245 | * self-healing writes triggered by normal (non-scrubbing) | |
2246 | * reads, because we have no transactional context in which to | |
2247 | * do so -- and it's not clear that it'd be desirable anyway. | |
2248 | */ | |
2249 | if (vd->vdev_ops->vdev_op_leaf) { | |
2250 | uint64_t commit_txg = txg; | |
2251 | if (flags & ZIO_FLAG_SCRUB_THREAD) { | |
2252 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
2253 | ASSERT(spa_sync_pass(spa) == 1); | |
2254 | vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); | |
2255 | commit_txg = spa->spa_syncing_txg; | |
2256 | } | |
2257 | ASSERT(commit_txg >= spa->spa_syncing_txg); | |
2258 | if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) | |
34dc7c2f | 2259 | return; |
fb5f0bc8 BB |
2260 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) |
2261 | vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); | |
2262 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); | |
34dc7c2f | 2263 | } |
fb5f0bc8 BB |
2264 | if (vd != rvd) |
2265 | vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); | |
34dc7c2f BB |
2266 | } |
2267 | } | |
2268 | ||
2269 | void | |
2270 | vdev_scrub_stat_update(vdev_t *vd, pool_scrub_type_t type, boolean_t complete) | |
2271 | { | |
34dc7c2f BB |
2272 | vdev_stat_t *vs = &vd->vdev_stat; |
2273 | ||
9babb374 | 2274 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
2275 | vdev_scrub_stat_update(vd->vdev_child[c], type, complete); |
2276 | ||
2277 | mutex_enter(&vd->vdev_stat_lock); | |
2278 | ||
2279 | if (type == POOL_SCRUB_NONE) { | |
2280 | /* | |
2281 | * Update completion and end time. Leave everything else alone | |
2282 | * so we can report what happened during the previous scrub. | |
2283 | */ | |
2284 | vs->vs_scrub_complete = complete; | |
2285 | vs->vs_scrub_end = gethrestime_sec(); | |
2286 | } else { | |
2287 | vs->vs_scrub_type = type; | |
2288 | vs->vs_scrub_complete = 0; | |
2289 | vs->vs_scrub_examined = 0; | |
2290 | vs->vs_scrub_repaired = 0; | |
34dc7c2f BB |
2291 | vs->vs_scrub_start = gethrestime_sec(); |
2292 | vs->vs_scrub_end = 0; | |
2293 | } | |
2294 | ||
2295 | mutex_exit(&vd->vdev_stat_lock); | |
2296 | } | |
2297 | ||
2298 | /* | |
2299 | * Update the in-core space usage stats for this vdev and the root vdev. | |
2300 | */ | |
2301 | void | |
2302 | vdev_space_update(vdev_t *vd, int64_t space_delta, int64_t alloc_delta, | |
2303 | boolean_t update_root) | |
2304 | { | |
2305 | int64_t dspace_delta = space_delta; | |
2306 | spa_t *spa = vd->vdev_spa; | |
2307 | vdev_t *rvd = spa->spa_root_vdev; | |
2308 | ||
2309 | ASSERT(vd == vd->vdev_top); | |
2310 | ||
2311 | /* | |
2312 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
2313 | * factor. We must calculate this here and not at the root vdev | |
2314 | * because the root vdev's psize-to-asize is simply the max of its | |
2315 | * childrens', thus not accurate enough for us. | |
2316 | */ | |
2317 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
9babb374 | 2318 | ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); |
34dc7c2f BB |
2319 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * |
2320 | vd->vdev_deflate_ratio; | |
2321 | ||
2322 | mutex_enter(&vd->vdev_stat_lock); | |
2323 | vd->vdev_stat.vs_space += space_delta; | |
2324 | vd->vdev_stat.vs_alloc += alloc_delta; | |
2325 | vd->vdev_stat.vs_dspace += dspace_delta; | |
2326 | mutex_exit(&vd->vdev_stat_lock); | |
2327 | ||
2328 | if (update_root) { | |
2329 | ASSERT(rvd == vd->vdev_parent); | |
2330 | ASSERT(vd->vdev_ms_count != 0); | |
2331 | ||
2332 | /* | |
2333 | * Don't count non-normal (e.g. intent log) space as part of | |
2334 | * the pool's capacity. | |
2335 | */ | |
2336 | if (vd->vdev_mg->mg_class != spa->spa_normal_class) | |
2337 | return; | |
2338 | ||
2339 | mutex_enter(&rvd->vdev_stat_lock); | |
2340 | rvd->vdev_stat.vs_space += space_delta; | |
2341 | rvd->vdev_stat.vs_alloc += alloc_delta; | |
2342 | rvd->vdev_stat.vs_dspace += dspace_delta; | |
2343 | mutex_exit(&rvd->vdev_stat_lock); | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | /* | |
2348 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
2349 | * so that it will be written out next time the vdev configuration is synced. | |
2350 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
2351 | */ | |
2352 | void | |
2353 | vdev_config_dirty(vdev_t *vd) | |
2354 | { | |
2355 | spa_t *spa = vd->vdev_spa; | |
2356 | vdev_t *rvd = spa->spa_root_vdev; | |
2357 | int c; | |
2358 | ||
2359 | /* | |
9babb374 BB |
2360 | * If this is an aux vdev (as with l2cache and spare devices), then we |
2361 | * update the vdev config manually and set the sync flag. | |
b128c09f BB |
2362 | */ |
2363 | if (vd->vdev_aux != NULL) { | |
2364 | spa_aux_vdev_t *sav = vd->vdev_aux; | |
2365 | nvlist_t **aux; | |
2366 | uint_t naux; | |
2367 | ||
2368 | for (c = 0; c < sav->sav_count; c++) { | |
2369 | if (sav->sav_vdevs[c] == vd) | |
2370 | break; | |
2371 | } | |
2372 | ||
2373 | if (c == sav->sav_count) { | |
2374 | /* | |
2375 | * We're being removed. There's nothing more to do. | |
2376 | */ | |
2377 | ASSERT(sav->sav_sync == B_TRUE); | |
2378 | return; | |
2379 | } | |
2380 | ||
2381 | sav->sav_sync = B_TRUE; | |
2382 | ||
9babb374 BB |
2383 | if (nvlist_lookup_nvlist_array(sav->sav_config, |
2384 | ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { | |
2385 | VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, | |
2386 | ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); | |
2387 | } | |
b128c09f BB |
2388 | |
2389 | ASSERT(c < naux); | |
2390 | ||
2391 | /* | |
2392 | * Setting the nvlist in the middle if the array is a little | |
2393 | * sketchy, but it will work. | |
2394 | */ | |
2395 | nvlist_free(aux[c]); | |
2396 | aux[c] = vdev_config_generate(spa, vd, B_TRUE, B_FALSE, B_TRUE); | |
2397 | ||
2398 | return; | |
2399 | } | |
2400 | ||
2401 | /* | |
2402 | * The dirty list is protected by the SCL_CONFIG lock. The caller | |
2403 | * must either hold SCL_CONFIG as writer, or must be the sync thread | |
2404 | * (which holds SCL_CONFIG as reader). There's only one sync thread, | |
34dc7c2f BB |
2405 | * so this is sufficient to ensure mutual exclusion. |
2406 | */ | |
b128c09f BB |
2407 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2408 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2409 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f BB |
2410 | |
2411 | if (vd == rvd) { | |
2412 | for (c = 0; c < rvd->vdev_children; c++) | |
2413 | vdev_config_dirty(rvd->vdev_child[c]); | |
2414 | } else { | |
2415 | ASSERT(vd == vd->vdev_top); | |
2416 | ||
b128c09f BB |
2417 | if (!list_link_active(&vd->vdev_config_dirty_node)) |
2418 | list_insert_head(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2419 | } |
2420 | } | |
2421 | ||
2422 | void | |
2423 | vdev_config_clean(vdev_t *vd) | |
2424 | { | |
2425 | spa_t *spa = vd->vdev_spa; | |
2426 | ||
b128c09f BB |
2427 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
2428 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2429 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f | 2430 | |
b128c09f BB |
2431 | ASSERT(list_link_active(&vd->vdev_config_dirty_node)); |
2432 | list_remove(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
2433 | } |
2434 | ||
b128c09f BB |
2435 | /* |
2436 | * Mark a top-level vdev's state as dirty, so that the next pass of | |
2437 | * spa_sync() can convert this into vdev_config_dirty(). We distinguish | |
2438 | * the state changes from larger config changes because they require | |
2439 | * much less locking, and are often needed for administrative actions. | |
2440 | */ | |
2441 | void | |
2442 | vdev_state_dirty(vdev_t *vd) | |
2443 | { | |
2444 | spa_t *spa = vd->vdev_spa; | |
2445 | ||
2446 | ASSERT(vd == vd->vdev_top); | |
2447 | ||
2448 | /* | |
2449 | * The state list is protected by the SCL_STATE lock. The caller | |
2450 | * must either hold SCL_STATE as writer, or must be the sync thread | |
2451 | * (which holds SCL_STATE as reader). There's only one sync thread, | |
2452 | * so this is sufficient to ensure mutual exclusion. | |
2453 | */ | |
2454 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2455 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2456 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2457 | ||
2458 | if (!list_link_active(&vd->vdev_state_dirty_node)) | |
2459 | list_insert_head(&spa->spa_state_dirty_list, vd); | |
2460 | } | |
2461 | ||
2462 | void | |
2463 | vdev_state_clean(vdev_t *vd) | |
2464 | { | |
2465 | spa_t *spa = vd->vdev_spa; | |
2466 | ||
2467 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
2468 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
2469 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
2470 | ||
2471 | ASSERT(list_link_active(&vd->vdev_state_dirty_node)); | |
2472 | list_remove(&spa->spa_state_dirty_list, vd); | |
2473 | } | |
2474 | ||
2475 | /* | |
2476 | * Propagate vdev state up from children to parent. | |
2477 | */ | |
34dc7c2f BB |
2478 | void |
2479 | vdev_propagate_state(vdev_t *vd) | |
2480 | { | |
fb5f0bc8 BB |
2481 | spa_t *spa = vd->vdev_spa; |
2482 | vdev_t *rvd = spa->spa_root_vdev; | |
34dc7c2f BB |
2483 | int degraded = 0, faulted = 0; |
2484 | int corrupted = 0; | |
34dc7c2f BB |
2485 | vdev_t *child; |
2486 | ||
2487 | if (vd->vdev_children > 0) { | |
9babb374 | 2488 | for (int c = 0; c < vd->vdev_children; c++) { |
34dc7c2f | 2489 | child = vd->vdev_child[c]; |
b128c09f BB |
2490 | |
2491 | if (!vdev_readable(child) || | |
fb5f0bc8 | 2492 | (!vdev_writeable(child) && spa_writeable(spa))) { |
b128c09f BB |
2493 | /* |
2494 | * Root special: if there is a top-level log | |
2495 | * device, treat the root vdev as if it were | |
2496 | * degraded. | |
2497 | */ | |
2498 | if (child->vdev_islog && vd == rvd) | |
2499 | degraded++; | |
2500 | else | |
2501 | faulted++; | |
2502 | } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { | |
34dc7c2f | 2503 | degraded++; |
b128c09f | 2504 | } |
34dc7c2f BB |
2505 | |
2506 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
2507 | corrupted++; | |
2508 | } | |
2509 | ||
2510 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
2511 | ||
2512 | /* | |
b128c09f | 2513 | * Root special: if there is a top-level vdev that cannot be |
34dc7c2f BB |
2514 | * opened due to corrupted metadata, then propagate the root |
2515 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
2516 | * replicas'. | |
2517 | */ | |
2518 | if (corrupted && vd == rvd && | |
2519 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
2520 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2521 | VDEV_AUX_CORRUPT_DATA); | |
2522 | } | |
2523 | ||
b128c09f | 2524 | if (vd->vdev_parent) |
34dc7c2f BB |
2525 | vdev_propagate_state(vd->vdev_parent); |
2526 | } | |
2527 | ||
2528 | /* | |
2529 | * Set a vdev's state. If this is during an open, we don't update the parent | |
2530 | * state, because we're in the process of opening children depth-first. | |
2531 | * Otherwise, we propagate the change to the parent. | |
2532 | * | |
2533 | * If this routine places a device in a faulted state, an appropriate ereport is | |
2534 | * generated. | |
2535 | */ | |
2536 | void | |
2537 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
2538 | { | |
2539 | uint64_t save_state; | |
b128c09f | 2540 | spa_t *spa = vd->vdev_spa; |
34dc7c2f BB |
2541 | |
2542 | if (state == vd->vdev_state) { | |
2543 | vd->vdev_stat.vs_aux = aux; | |
2544 | return; | |
2545 | } | |
2546 | ||
2547 | save_state = vd->vdev_state; | |
2548 | ||
2549 | vd->vdev_state = state; | |
2550 | vd->vdev_stat.vs_aux = aux; | |
2551 | ||
2552 | /* | |
2553 | * If we are setting the vdev state to anything but an open state, then | |
2554 | * always close the underlying device. Otherwise, we keep accessible | |
2555 | * but invalid devices open forever. We don't call vdev_close() itself, | |
2556 | * because that implies some extra checks (offline, etc) that we don't | |
2557 | * want here. This is limited to leaf devices, because otherwise | |
2558 | * closing the device will affect other children. | |
2559 | */ | |
b128c09f | 2560 | if (vdev_is_dead(vd) && vd->vdev_ops->vdev_op_leaf) |
34dc7c2f BB |
2561 | vd->vdev_ops->vdev_op_close(vd); |
2562 | ||
2563 | if (vd->vdev_removed && | |
2564 | state == VDEV_STATE_CANT_OPEN && | |
2565 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
2566 | /* | |
2567 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
2568 | * device was previously marked removed and someone attempted to | |
2569 | * reopen it. If this failed due to a nonexistent device, then | |
2570 | * keep the device in the REMOVED state. We also let this be if | |
2571 | * it is one of our special test online cases, which is only | |
2572 | * attempting to online the device and shouldn't generate an FMA | |
2573 | * fault. | |
2574 | */ | |
2575 | vd->vdev_state = VDEV_STATE_REMOVED; | |
2576 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
2577 | } else if (state == VDEV_STATE_REMOVED) { | |
2578 | /* | |
2579 | * Indicate to the ZFS DE that this device has been removed, and | |
2580 | * any recent errors should be ignored. | |
2581 | */ | |
b128c09f | 2582 | zfs_post_remove(spa, vd); |
34dc7c2f BB |
2583 | vd->vdev_removed = B_TRUE; |
2584 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
2585 | /* | |
2586 | * If we fail to open a vdev during an import, we mark it as | |
2587 | * "not available", which signifies that it was never there to | |
2588 | * begin with. Failure to open such a device is not considered | |
2589 | * an error. | |
2590 | */ | |
b128c09f | 2591 | if (spa->spa_load_state == SPA_LOAD_IMPORT && |
34dc7c2f BB |
2592 | vd->vdev_ops->vdev_op_leaf) |
2593 | vd->vdev_not_present = 1; | |
2594 | ||
2595 | /* | |
2596 | * Post the appropriate ereport. If the 'prevstate' field is | |
2597 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
2598 | * that this is part of a vdev_reopen(). In this case, we don't | |
2599 | * want to post the ereport if the device was already in the | |
2600 | * CANT_OPEN state beforehand. | |
2601 | * | |
2602 | * If the 'checkremove' flag is set, then this is an attempt to | |
2603 | * online the device in response to an insertion event. If we | |
2604 | * hit this case, then we have detected an insertion event for a | |
2605 | * faulted or offline device that wasn't in the removed state. | |
2606 | * In this scenario, we don't post an ereport because we are | |
2607 | * about to replace the device, or attempt an online with | |
2608 | * vdev_forcefault, which will generate the fault for us. | |
2609 | */ | |
2610 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
2611 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
b128c09f | 2612 | vd != spa->spa_root_vdev) { |
34dc7c2f BB |
2613 | const char *class; |
2614 | ||
2615 | switch (aux) { | |
2616 | case VDEV_AUX_OPEN_FAILED: | |
2617 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
2618 | break; | |
2619 | case VDEV_AUX_CORRUPT_DATA: | |
2620 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
2621 | break; | |
2622 | case VDEV_AUX_NO_REPLICAS: | |
2623 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
2624 | break; | |
2625 | case VDEV_AUX_BAD_GUID_SUM: | |
2626 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
2627 | break; | |
2628 | case VDEV_AUX_TOO_SMALL: | |
2629 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
2630 | break; | |
2631 | case VDEV_AUX_BAD_LABEL: | |
2632 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
2633 | break; | |
b128c09f BB |
2634 | case VDEV_AUX_IO_FAILURE: |
2635 | class = FM_EREPORT_ZFS_IO_FAILURE; | |
2636 | break; | |
34dc7c2f BB |
2637 | default: |
2638 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
2639 | } | |
2640 | ||
b128c09f | 2641 | zfs_ereport_post(class, spa, vd, NULL, save_state, 0); |
34dc7c2f BB |
2642 | } |
2643 | ||
2644 | /* Erase any notion of persistent removed state */ | |
2645 | vd->vdev_removed = B_FALSE; | |
2646 | } else { | |
2647 | vd->vdev_removed = B_FALSE; | |
2648 | } | |
2649 | ||
9babb374 BB |
2650 | if (!isopen && vd->vdev_parent) |
2651 | vdev_propagate_state(vd->vdev_parent); | |
34dc7c2f | 2652 | } |
b128c09f BB |
2653 | |
2654 | /* | |
2655 | * Check the vdev configuration to ensure that it's capable of supporting | |
2656 | * a root pool. Currently, we do not support RAID-Z or partial configuration. | |
2657 | * In addition, only a single top-level vdev is allowed and none of the leaves | |
2658 | * can be wholedisks. | |
2659 | */ | |
2660 | boolean_t | |
2661 | vdev_is_bootable(vdev_t *vd) | |
2662 | { | |
b128c09f BB |
2663 | if (!vd->vdev_ops->vdev_op_leaf) { |
2664 | char *vdev_type = vd->vdev_ops->vdev_op_type; | |
2665 | ||
2666 | if (strcmp(vdev_type, VDEV_TYPE_ROOT) == 0 && | |
2667 | vd->vdev_children > 1) { | |
2668 | return (B_FALSE); | |
2669 | } else if (strcmp(vdev_type, VDEV_TYPE_RAIDZ) == 0 || | |
2670 | strcmp(vdev_type, VDEV_TYPE_MISSING) == 0) { | |
2671 | return (B_FALSE); | |
2672 | } | |
2673 | } else if (vd->vdev_wholedisk == 1) { | |
2674 | return (B_FALSE); | |
2675 | } | |
2676 | ||
9babb374 | 2677 | for (int c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
2678 | if (!vdev_is_bootable(vd->vdev_child[c])) |
2679 | return (B_FALSE); | |
2680 | } | |
2681 | return (B_TRUE); | |
2682 | } | |
9babb374 BB |
2683 | |
2684 | void | |
2685 | vdev_load_log_state(vdev_t *vd, nvlist_t *nv) | |
2686 | { | |
2687 | uint_t children; | |
2688 | nvlist_t **child; | |
2689 | uint64_t val; | |
2690 | spa_t *spa = vd->vdev_spa; | |
2691 | ||
2692 | if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
2693 | &child, &children) == 0) { | |
2694 | for (int c = 0; c < children; c++) | |
2695 | vdev_load_log_state(vd->vdev_child[c], child[c]); | |
2696 | } | |
2697 | ||
2698 | if (vd->vdev_ops->vdev_op_leaf && nvlist_lookup_uint64(nv, | |
2699 | ZPOOL_CONFIG_OFFLINE, &val) == 0 && val) { | |
2700 | ||
2701 | /* | |
2702 | * It would be nice to call vdev_offline() | |
2703 | * directly but the pool isn't fully loaded and | |
2704 | * the txg threads have not been started yet. | |
2705 | */ | |
2706 | spa_config_enter(spa, SCL_STATE_ALL, FTAG, RW_WRITER); | |
2707 | vd->vdev_offline = val; | |
2708 | vdev_reopen(vd->vdev_top); | |
2709 | spa_config_exit(spa, SCL_STATE_ALL, FTAG); | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | /* | |
2714 | * Expand a vdev if possible. | |
2715 | */ | |
2716 | void | |
2717 | vdev_expand(vdev_t *vd, uint64_t txg) | |
2718 | { | |
2719 | ASSERT(vd->vdev_top == vd); | |
2720 | ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
2721 | ||
2722 | if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { | |
2723 | VERIFY(vdev_metaslab_init(vd, txg) == 0); | |
2724 | vdev_config_dirty(vd); | |
2725 | } | |
2726 | } |