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Commit | Line | Data |
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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 | /* | |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
74d42600 | 24 | * Copyright (c) 2011, 2018 by Delphix. All rights reserved. |
153b2285 | 25 | * Copyright 2017 Nexenta Systems, Inc. |
e550644f BB |
26 | * Copyright (c) 2014 Integros [integros.com] |
27 | * Copyright 2016 Toomas Soome <tsoome@me.com> | |
12fa0466 | 28 | * Copyright 2017 Joyent, Inc. |
34dc7c2f BB |
29 | */ |
30 | ||
34dc7c2f BB |
31 | #include <sys/zfs_context.h> |
32 | #include <sys/fm/fs/zfs.h> | |
33 | #include <sys/spa.h> | |
34 | #include <sys/spa_impl.h> | |
a1d477c2 | 35 | #include <sys/bpobj.h> |
34dc7c2f BB |
36 | #include <sys/dmu.h> |
37 | #include <sys/dmu_tx.h> | |
a1d477c2 | 38 | #include <sys/dsl_dir.h> |
34dc7c2f BB |
39 | #include <sys/vdev_impl.h> |
40 | #include <sys/uberblock_impl.h> | |
41 | #include <sys/metaslab.h> | |
42 | #include <sys/metaslab_impl.h> | |
43 | #include <sys/space_map.h> | |
93cf2076 | 44 | #include <sys/space_reftree.h> |
34dc7c2f BB |
45 | #include <sys/zio.h> |
46 | #include <sys/zap.h> | |
47 | #include <sys/fs/zfs.h> | |
b128c09f | 48 | #include <sys/arc.h> |
9babb374 | 49 | #include <sys/zil.h> |
428870ff | 50 | #include <sys/dsl_scan.h> |
a6255b7f | 51 | #include <sys/abd.h> |
6c285672 | 52 | #include <sys/zvol.h> |
6078881a | 53 | #include <sys/zfs_ratelimit.h> |
34dc7c2f | 54 | |
d2734cce SD |
55 | /* maximum number of metaslabs per top-level vdev */ |
56 | int vdev_max_ms_count = 200; | |
57 | ||
58 | /* minimum amount of metaslabs per top-level vdev */ | |
59 | int vdev_min_ms_count = 16; | |
60 | ||
61 | /* see comment in vdev_metaslab_set_size() */ | |
62 | int vdev_default_ms_shift = 29; | |
63 | ||
64 | int vdev_validate_skip = B_FALSE; | |
65 | ||
b8bcca18 | 66 | /* |
d2734cce SD |
67 | * Since the DTL space map of a vdev is not expected to have a lot of |
68 | * entries, we default its block size to 4K. | |
b8bcca18 | 69 | */ |
d2734cce | 70 | int vdev_dtl_sm_blksz = (1 << 12); |
b8bcca18 | 71 | |
80d52c39 TH |
72 | /* |
73 | * Rate limit delay events to this many IO delays per second. | |
74 | */ | |
75 | unsigned int zfs_delays_per_second = 20; | |
76 | ||
77 | /* | |
78 | * Rate limit checksum events after this many checksum errors per second. | |
79 | */ | |
80 | unsigned int zfs_checksums_per_second = 20; | |
81 | ||
02638a30 TC |
82 | /* |
83 | * Ignore errors during scrub/resilver. Allows to work around resilver | |
84 | * upon import when there are pool errors. | |
85 | */ | |
86 | int zfs_scan_ignore_errors = 0; | |
87 | ||
d2734cce SD |
88 | /* |
89 | * vdev-wide space maps that have lots of entries written to them at | |
90 | * the end of each transaction can benefit from a higher I/O bandwidth | |
91 | * (e.g. vdev_obsolete_sm), thus we default their block size to 128K. | |
92 | */ | |
93 | int vdev_standard_sm_blksz = (1 << 17); | |
6cb8e530 | 94 | |
4a0ee12a PZ |
95 | /*PRINTFLIKE2*/ |
96 | void | |
97 | vdev_dbgmsg(vdev_t *vd, const char *fmt, ...) | |
98 | { | |
99 | va_list adx; | |
100 | char buf[256]; | |
101 | ||
102 | va_start(adx, fmt); | |
103 | (void) vsnprintf(buf, sizeof (buf), fmt, adx); | |
104 | va_end(adx); | |
105 | ||
106 | if (vd->vdev_path != NULL) { | |
107 | zfs_dbgmsg("%s vdev '%s': %s", vd->vdev_ops->vdev_op_type, | |
108 | vd->vdev_path, buf); | |
109 | } else { | |
110 | zfs_dbgmsg("%s-%llu vdev (guid %llu): %s", | |
111 | vd->vdev_ops->vdev_op_type, | |
112 | (u_longlong_t)vd->vdev_id, | |
113 | (u_longlong_t)vd->vdev_guid, buf); | |
114 | } | |
115 | } | |
116 | ||
6cb8e530 PZ |
117 | void |
118 | vdev_dbgmsg_print_tree(vdev_t *vd, int indent) | |
119 | { | |
120 | char state[20]; | |
121 | ||
122 | if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) { | |
123 | zfs_dbgmsg("%*svdev %u: %s", indent, "", vd->vdev_id, | |
124 | vd->vdev_ops->vdev_op_type); | |
125 | return; | |
126 | } | |
127 | ||
128 | switch (vd->vdev_state) { | |
129 | case VDEV_STATE_UNKNOWN: | |
130 | (void) snprintf(state, sizeof (state), "unknown"); | |
131 | break; | |
132 | case VDEV_STATE_CLOSED: | |
133 | (void) snprintf(state, sizeof (state), "closed"); | |
134 | break; | |
135 | case VDEV_STATE_OFFLINE: | |
136 | (void) snprintf(state, sizeof (state), "offline"); | |
137 | break; | |
138 | case VDEV_STATE_REMOVED: | |
139 | (void) snprintf(state, sizeof (state), "removed"); | |
140 | break; | |
141 | case VDEV_STATE_CANT_OPEN: | |
142 | (void) snprintf(state, sizeof (state), "can't open"); | |
143 | break; | |
144 | case VDEV_STATE_FAULTED: | |
145 | (void) snprintf(state, sizeof (state), "faulted"); | |
146 | break; | |
147 | case VDEV_STATE_DEGRADED: | |
148 | (void) snprintf(state, sizeof (state), "degraded"); | |
149 | break; | |
150 | case VDEV_STATE_HEALTHY: | |
151 | (void) snprintf(state, sizeof (state), "healthy"); | |
152 | break; | |
153 | default: | |
154 | (void) snprintf(state, sizeof (state), "<state %u>", | |
155 | (uint_t)vd->vdev_state); | |
156 | } | |
157 | ||
158 | zfs_dbgmsg("%*svdev %u: %s%s, guid: %llu, path: %s, %s", indent, | |
159 | "", vd->vdev_id, vd->vdev_ops->vdev_op_type, | |
160 | vd->vdev_islog ? " (log)" : "", | |
161 | (u_longlong_t)vd->vdev_guid, | |
162 | vd->vdev_path ? vd->vdev_path : "N/A", state); | |
163 | ||
164 | for (uint64_t i = 0; i < vd->vdev_children; i++) | |
165 | vdev_dbgmsg_print_tree(vd->vdev_child[i], indent + 2); | |
166 | } | |
167 | ||
34dc7c2f BB |
168 | /* |
169 | * Virtual device management. | |
170 | */ | |
171 | ||
172 | static vdev_ops_t *vdev_ops_table[] = { | |
173 | &vdev_root_ops, | |
174 | &vdev_raidz_ops, | |
175 | &vdev_mirror_ops, | |
176 | &vdev_replacing_ops, | |
177 | &vdev_spare_ops, | |
178 | &vdev_disk_ops, | |
179 | &vdev_file_ops, | |
180 | &vdev_missing_ops, | |
428870ff | 181 | &vdev_hole_ops, |
a1d477c2 | 182 | &vdev_indirect_ops, |
34dc7c2f BB |
183 | NULL |
184 | }; | |
185 | ||
34dc7c2f BB |
186 | /* |
187 | * Given a vdev type, return the appropriate ops vector. | |
188 | */ | |
189 | static vdev_ops_t * | |
190 | vdev_getops(const char *type) | |
191 | { | |
192 | vdev_ops_t *ops, **opspp; | |
193 | ||
194 | for (opspp = vdev_ops_table; (ops = *opspp) != NULL; opspp++) | |
195 | if (strcmp(ops->vdev_op_type, type) == 0) | |
196 | break; | |
197 | ||
198 | return (ops); | |
199 | } | |
200 | ||
201 | /* | |
202 | * Default asize function: return the MAX of psize with the asize of | |
203 | * all children. This is what's used by anything other than RAID-Z. | |
204 | */ | |
205 | uint64_t | |
206 | vdev_default_asize(vdev_t *vd, uint64_t psize) | |
207 | { | |
208 | uint64_t asize = P2ROUNDUP(psize, 1ULL << vd->vdev_top->vdev_ashift); | |
209 | uint64_t csize; | |
34dc7c2f | 210 | |
1c27024e | 211 | for (int c = 0; c < vd->vdev_children; c++) { |
34dc7c2f BB |
212 | csize = vdev_psize_to_asize(vd->vdev_child[c], psize); |
213 | asize = MAX(asize, csize); | |
214 | } | |
215 | ||
216 | return (asize); | |
217 | } | |
218 | ||
219 | /* | |
9babb374 BB |
220 | * Get the minimum allocatable size. We define the allocatable size as |
221 | * the vdev's asize rounded to the nearest metaslab. This allows us to | |
222 | * replace or attach devices which don't have the same physical size but | |
223 | * can still satisfy the same number of allocations. | |
34dc7c2f BB |
224 | */ |
225 | uint64_t | |
9babb374 | 226 | vdev_get_min_asize(vdev_t *vd) |
34dc7c2f | 227 | { |
9babb374 | 228 | vdev_t *pvd = vd->vdev_parent; |
34dc7c2f | 229 | |
9babb374 | 230 | /* |
1bd201e7 | 231 | * If our parent is NULL (inactive spare or cache) or is the root, |
9babb374 BB |
232 | * just return our own asize. |
233 | */ | |
234 | if (pvd == NULL) | |
235 | return (vd->vdev_asize); | |
34dc7c2f BB |
236 | |
237 | /* | |
9babb374 BB |
238 | * The top-level vdev just returns the allocatable size rounded |
239 | * to the nearest metaslab. | |
34dc7c2f | 240 | */ |
9babb374 BB |
241 | if (vd == vd->vdev_top) |
242 | return (P2ALIGN(vd->vdev_asize, 1ULL << vd->vdev_ms_shift)); | |
34dc7c2f | 243 | |
9babb374 BB |
244 | /* |
245 | * The allocatable space for a raidz vdev is N * sizeof(smallest child), | |
246 | * so each child must provide at least 1/Nth of its asize. | |
247 | */ | |
248 | if (pvd->vdev_ops == &vdev_raidz_ops) | |
2e215fec SH |
249 | return ((pvd->vdev_min_asize + pvd->vdev_children - 1) / |
250 | pvd->vdev_children); | |
34dc7c2f | 251 | |
9babb374 BB |
252 | return (pvd->vdev_min_asize); |
253 | } | |
254 | ||
255 | void | |
256 | vdev_set_min_asize(vdev_t *vd) | |
257 | { | |
258 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
34dc7c2f | 259 | |
1c27024e | 260 | for (int c = 0; c < vd->vdev_children; c++) |
9babb374 | 261 | vdev_set_min_asize(vd->vdev_child[c]); |
34dc7c2f BB |
262 | } |
263 | ||
264 | vdev_t * | |
265 | vdev_lookup_top(spa_t *spa, uint64_t vdev) | |
266 | { | |
267 | vdev_t *rvd = spa->spa_root_vdev; | |
268 | ||
b128c09f | 269 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 270 | |
b128c09f BB |
271 | if (vdev < rvd->vdev_children) { |
272 | ASSERT(rvd->vdev_child[vdev] != NULL); | |
34dc7c2f | 273 | return (rvd->vdev_child[vdev]); |
b128c09f | 274 | } |
34dc7c2f BB |
275 | |
276 | return (NULL); | |
277 | } | |
278 | ||
279 | vdev_t * | |
280 | vdev_lookup_by_guid(vdev_t *vd, uint64_t guid) | |
281 | { | |
34dc7c2f BB |
282 | vdev_t *mvd; |
283 | ||
284 | if (vd->vdev_guid == guid) | |
285 | return (vd); | |
286 | ||
1c27024e | 287 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
288 | if ((mvd = vdev_lookup_by_guid(vd->vdev_child[c], guid)) != |
289 | NULL) | |
290 | return (mvd); | |
291 | ||
292 | return (NULL); | |
293 | } | |
294 | ||
9c43027b AJ |
295 | static int |
296 | vdev_count_leaves_impl(vdev_t *vd) | |
297 | { | |
298 | int n = 0; | |
9c43027b AJ |
299 | |
300 | if (vd->vdev_ops->vdev_op_leaf) | |
301 | return (1); | |
302 | ||
1c27024e | 303 | for (int c = 0; c < vd->vdev_children; c++) |
9c43027b AJ |
304 | n += vdev_count_leaves_impl(vd->vdev_child[c]); |
305 | ||
306 | return (n); | |
307 | } | |
308 | ||
309 | int | |
310 | vdev_count_leaves(spa_t *spa) | |
311 | { | |
743253df OF |
312 | int rc; |
313 | ||
314 | spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER); | |
315 | rc = vdev_count_leaves_impl(spa->spa_root_vdev); | |
316 | spa_config_exit(spa, SCL_VDEV, FTAG); | |
317 | ||
318 | return (rc); | |
9c43027b AJ |
319 | } |
320 | ||
34dc7c2f BB |
321 | void |
322 | vdev_add_child(vdev_t *pvd, vdev_t *cvd) | |
323 | { | |
324 | size_t oldsize, newsize; | |
325 | uint64_t id = cvd->vdev_id; | |
326 | vdev_t **newchild; | |
327 | ||
44de2f02 | 328 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
329 | ASSERT(cvd->vdev_parent == NULL); |
330 | ||
331 | cvd->vdev_parent = pvd; | |
332 | ||
333 | if (pvd == NULL) | |
334 | return; | |
335 | ||
336 | ASSERT(id >= pvd->vdev_children || pvd->vdev_child[id] == NULL); | |
337 | ||
338 | oldsize = pvd->vdev_children * sizeof (vdev_t *); | |
339 | pvd->vdev_children = MAX(pvd->vdev_children, id + 1); | |
340 | newsize = pvd->vdev_children * sizeof (vdev_t *); | |
341 | ||
79c76d5b | 342 | newchild = kmem_alloc(newsize, KM_SLEEP); |
34dc7c2f BB |
343 | if (pvd->vdev_child != NULL) { |
344 | bcopy(pvd->vdev_child, newchild, oldsize); | |
345 | kmem_free(pvd->vdev_child, oldsize); | |
346 | } | |
347 | ||
348 | pvd->vdev_child = newchild; | |
349 | pvd->vdev_child[id] = cvd; | |
350 | ||
351 | cvd->vdev_top = (pvd->vdev_top ? pvd->vdev_top: cvd); | |
352 | ASSERT(cvd->vdev_top->vdev_parent->vdev_parent == NULL); | |
353 | ||
354 | /* | |
355 | * Walk up all ancestors to update guid sum. | |
356 | */ | |
357 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
358 | pvd->vdev_guid_sum += cvd->vdev_guid_sum; | |
34dc7c2f BB |
359 | } |
360 | ||
361 | void | |
362 | vdev_remove_child(vdev_t *pvd, vdev_t *cvd) | |
363 | { | |
364 | int c; | |
365 | uint_t id = cvd->vdev_id; | |
366 | ||
367 | ASSERT(cvd->vdev_parent == pvd); | |
368 | ||
369 | if (pvd == NULL) | |
370 | return; | |
371 | ||
372 | ASSERT(id < pvd->vdev_children); | |
373 | ASSERT(pvd->vdev_child[id] == cvd); | |
374 | ||
375 | pvd->vdev_child[id] = NULL; | |
376 | cvd->vdev_parent = NULL; | |
377 | ||
378 | for (c = 0; c < pvd->vdev_children; c++) | |
379 | if (pvd->vdev_child[c]) | |
380 | break; | |
381 | ||
382 | if (c == pvd->vdev_children) { | |
383 | kmem_free(pvd->vdev_child, c * sizeof (vdev_t *)); | |
384 | pvd->vdev_child = NULL; | |
385 | pvd->vdev_children = 0; | |
386 | } | |
387 | ||
388 | /* | |
389 | * Walk up all ancestors to update guid sum. | |
390 | */ | |
391 | for (; pvd != NULL; pvd = pvd->vdev_parent) | |
392 | pvd->vdev_guid_sum -= cvd->vdev_guid_sum; | |
34dc7c2f BB |
393 | } |
394 | ||
395 | /* | |
396 | * Remove any holes in the child array. | |
397 | */ | |
398 | void | |
399 | vdev_compact_children(vdev_t *pvd) | |
400 | { | |
401 | vdev_t **newchild, *cvd; | |
402 | int oldc = pvd->vdev_children; | |
9babb374 | 403 | int newc; |
34dc7c2f | 404 | |
b128c09f | 405 | ASSERT(spa_config_held(pvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f | 406 | |
a1d477c2 MA |
407 | if (oldc == 0) |
408 | return; | |
409 | ||
1c27024e | 410 | for (int c = newc = 0; c < oldc; c++) |
34dc7c2f BB |
411 | if (pvd->vdev_child[c]) |
412 | newc++; | |
413 | ||
a1d477c2 MA |
414 | if (newc > 0) { |
415 | newchild = kmem_zalloc(newc * sizeof (vdev_t *), KM_SLEEP); | |
34dc7c2f | 416 | |
a1d477c2 MA |
417 | for (int c = newc = 0; c < oldc; c++) { |
418 | if ((cvd = pvd->vdev_child[c]) != NULL) { | |
419 | newchild[newc] = cvd; | |
420 | cvd->vdev_id = newc++; | |
421 | } | |
34dc7c2f | 422 | } |
a1d477c2 MA |
423 | } else { |
424 | newchild = NULL; | |
34dc7c2f BB |
425 | } |
426 | ||
427 | kmem_free(pvd->vdev_child, oldc * sizeof (vdev_t *)); | |
428 | pvd->vdev_child = newchild; | |
429 | pvd->vdev_children = newc; | |
430 | } | |
431 | ||
432 | /* | |
433 | * Allocate and minimally initialize a vdev_t. | |
434 | */ | |
428870ff | 435 | vdev_t * |
34dc7c2f BB |
436 | vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops) |
437 | { | |
438 | vdev_t *vd; | |
a1d477c2 | 439 | vdev_indirect_config_t *vic; |
34dc7c2f | 440 | |
79c76d5b | 441 | vd = kmem_zalloc(sizeof (vdev_t), KM_SLEEP); |
a1d477c2 | 442 | vic = &vd->vdev_indirect_config; |
34dc7c2f BB |
443 | |
444 | if (spa->spa_root_vdev == NULL) { | |
445 | ASSERT(ops == &vdev_root_ops); | |
446 | spa->spa_root_vdev = vd; | |
3541dc6d | 447 | spa->spa_load_guid = spa_generate_guid(NULL); |
34dc7c2f BB |
448 | } |
449 | ||
428870ff | 450 | if (guid == 0 && ops != &vdev_hole_ops) { |
34dc7c2f BB |
451 | if (spa->spa_root_vdev == vd) { |
452 | /* | |
453 | * The root vdev's guid will also be the pool guid, | |
454 | * which must be unique among all pools. | |
455 | */ | |
428870ff | 456 | guid = spa_generate_guid(NULL); |
34dc7c2f BB |
457 | } else { |
458 | /* | |
459 | * Any other vdev's guid must be unique within the pool. | |
460 | */ | |
428870ff | 461 | guid = spa_generate_guid(spa); |
34dc7c2f BB |
462 | } |
463 | ASSERT(!spa_guid_exists(spa_guid(spa), guid)); | |
464 | } | |
465 | ||
466 | vd->vdev_spa = spa; | |
467 | vd->vdev_id = id; | |
468 | vd->vdev_guid = guid; | |
469 | vd->vdev_guid_sum = guid; | |
470 | vd->vdev_ops = ops; | |
471 | vd->vdev_state = VDEV_STATE_CLOSED; | |
428870ff | 472 | vd->vdev_ishole = (ops == &vdev_hole_ops); |
a1d477c2 MA |
473 | vic->vic_prev_indirect_vdev = UINT64_MAX; |
474 | ||
475 | rw_init(&vd->vdev_indirect_rwlock, NULL, RW_DEFAULT, NULL); | |
476 | mutex_init(&vd->vdev_obsolete_lock, NULL, MUTEX_DEFAULT, NULL); | |
477 | vd->vdev_obsolete_segments = range_tree_create(NULL, NULL); | |
34dc7c2f | 478 | |
6078881a TH |
479 | /* |
480 | * Initialize rate limit structs for events. We rate limit ZIO delay | |
481 | * and checksum events so that we don't overwhelm ZED with thousands | |
482 | * of events when a disk is acting up. | |
483 | */ | |
80d52c39 TH |
484 | zfs_ratelimit_init(&vd->vdev_delay_rl, &zfs_delays_per_second, 1); |
485 | zfs_ratelimit_init(&vd->vdev_checksum_rl, &zfs_checksums_per_second, 1); | |
6078881a | 486 | |
98f72a53 BB |
487 | list_link_init(&vd->vdev_config_dirty_node); |
488 | list_link_init(&vd->vdev_state_dirty_node); | |
448d7aaa | 489 | mutex_init(&vd->vdev_dtl_lock, NULL, MUTEX_NOLOCKDEP, NULL); |
34dc7c2f | 490 | mutex_init(&vd->vdev_stat_lock, NULL, MUTEX_DEFAULT, NULL); |
b128c09f | 491 | mutex_init(&vd->vdev_probe_lock, NULL, MUTEX_DEFAULT, NULL); |
3dfb57a3 | 492 | mutex_init(&vd->vdev_queue_lock, NULL, MUTEX_DEFAULT, NULL); |
d4a72f23 | 493 | mutex_init(&vd->vdev_scan_io_queue_lock, NULL, MUTEX_DEFAULT, NULL); |
6078881a | 494 | |
1c27024e | 495 | for (int t = 0; t < DTL_TYPES; t++) { |
a1d477c2 | 496 | vd->vdev_dtl[t] = range_tree_create(NULL, NULL); |
fb5f0bc8 | 497 | } |
4747a7d3 | 498 | txg_list_create(&vd->vdev_ms_list, spa, |
34dc7c2f | 499 | offsetof(struct metaslab, ms_txg_node)); |
4747a7d3 | 500 | txg_list_create(&vd->vdev_dtl_list, spa, |
34dc7c2f BB |
501 | offsetof(struct vdev, vdev_dtl_node)); |
502 | vd->vdev_stat.vs_timestamp = gethrtime(); | |
503 | vdev_queue_init(vd); | |
504 | vdev_cache_init(vd); | |
505 | ||
506 | return (vd); | |
507 | } | |
508 | ||
509 | /* | |
510 | * Allocate a new vdev. The 'alloctype' is used to control whether we are | |
511 | * creating a new vdev or loading an existing one - the behavior is slightly | |
512 | * different for each case. | |
513 | */ | |
514 | int | |
515 | vdev_alloc(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, uint_t id, | |
516 | int alloctype) | |
517 | { | |
518 | vdev_ops_t *ops; | |
519 | char *type; | |
520 | uint64_t guid = 0, islog, nparity; | |
521 | vdev_t *vd; | |
a1d477c2 | 522 | vdev_indirect_config_t *vic; |
4a283c7f TH |
523 | char *tmp = NULL; |
524 | int rc; | |
34dc7c2f | 525 | |
b128c09f | 526 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
527 | |
528 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0) | |
2e528b49 | 529 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
530 | |
531 | if ((ops = vdev_getops(type)) == NULL) | |
2e528b49 | 532 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
533 | |
534 | /* | |
535 | * If this is a load, get the vdev guid from the nvlist. | |
536 | * Otherwise, vdev_alloc_common() will generate one for us. | |
537 | */ | |
538 | if (alloctype == VDEV_ALLOC_LOAD) { | |
539 | uint64_t label_id; | |
540 | ||
541 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ID, &label_id) || | |
542 | label_id != id) | |
2e528b49 | 543 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
544 | |
545 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
2e528b49 | 546 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
547 | } else if (alloctype == VDEV_ALLOC_SPARE) { |
548 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
2e528b49 | 549 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
550 | } else if (alloctype == VDEV_ALLOC_L2CACHE) { |
551 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
2e528b49 | 552 | return (SET_ERROR(EINVAL)); |
9babb374 BB |
553 | } else if (alloctype == VDEV_ALLOC_ROOTPOOL) { |
554 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) != 0) | |
2e528b49 | 555 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
556 | } |
557 | ||
558 | /* | |
559 | * The first allocated vdev must be of type 'root'. | |
560 | */ | |
561 | if (ops != &vdev_root_ops && spa->spa_root_vdev == NULL) | |
2e528b49 | 562 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
563 | |
564 | /* | |
565 | * Determine whether we're a log vdev. | |
566 | */ | |
567 | islog = 0; | |
568 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_LOG, &islog); | |
569 | if (islog && spa_version(spa) < SPA_VERSION_SLOGS) | |
2e528b49 | 570 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f | 571 | |
428870ff | 572 | if (ops == &vdev_hole_ops && spa_version(spa) < SPA_VERSION_HOLES) |
2e528b49 | 573 | return (SET_ERROR(ENOTSUP)); |
428870ff | 574 | |
34dc7c2f BB |
575 | /* |
576 | * Set the nparity property for RAID-Z vdevs. | |
577 | */ | |
578 | nparity = -1ULL; | |
579 | if (ops == &vdev_raidz_ops) { | |
580 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NPARITY, | |
581 | &nparity) == 0) { | |
428870ff | 582 | if (nparity == 0 || nparity > VDEV_RAIDZ_MAXPARITY) |
2e528b49 | 583 | return (SET_ERROR(EINVAL)); |
34dc7c2f | 584 | /* |
45d1cae3 BB |
585 | * Previous versions could only support 1 or 2 parity |
586 | * device. | |
34dc7c2f | 587 | */ |
45d1cae3 BB |
588 | if (nparity > 1 && |
589 | spa_version(spa) < SPA_VERSION_RAIDZ2) | |
2e528b49 | 590 | return (SET_ERROR(ENOTSUP)); |
45d1cae3 BB |
591 | if (nparity > 2 && |
592 | spa_version(spa) < SPA_VERSION_RAIDZ3) | |
2e528b49 | 593 | return (SET_ERROR(ENOTSUP)); |
34dc7c2f BB |
594 | } else { |
595 | /* | |
596 | * We require the parity to be specified for SPAs that | |
597 | * support multiple parity levels. | |
598 | */ | |
45d1cae3 | 599 | if (spa_version(spa) >= SPA_VERSION_RAIDZ2) |
2e528b49 | 600 | return (SET_ERROR(EINVAL)); |
34dc7c2f BB |
601 | /* |
602 | * Otherwise, we default to 1 parity device for RAID-Z. | |
603 | */ | |
604 | nparity = 1; | |
605 | } | |
606 | } else { | |
607 | nparity = 0; | |
608 | } | |
609 | ASSERT(nparity != -1ULL); | |
610 | ||
611 | vd = vdev_alloc_common(spa, id, guid, ops); | |
a1d477c2 | 612 | vic = &vd->vdev_indirect_config; |
34dc7c2f BB |
613 | |
614 | vd->vdev_islog = islog; | |
615 | vd->vdev_nparity = nparity; | |
616 | ||
617 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &vd->vdev_path) == 0) | |
618 | vd->vdev_path = spa_strdup(vd->vdev_path); | |
4a283c7f TH |
619 | |
620 | /* | |
621 | * ZPOOL_CONFIG_AUX_STATE = "external" means we previously forced a | |
622 | * fault on a vdev and want it to persist across imports (like with | |
623 | * zpool offline -f). | |
624 | */ | |
625 | rc = nvlist_lookup_string(nv, ZPOOL_CONFIG_AUX_STATE, &tmp); | |
626 | if (rc == 0 && tmp != NULL && strcmp(tmp, "external") == 0) { | |
627 | vd->vdev_stat.vs_aux = VDEV_AUX_EXTERNAL; | |
628 | vd->vdev_faulted = 1; | |
629 | vd->vdev_label_aux = VDEV_AUX_EXTERNAL; | |
630 | } | |
631 | ||
34dc7c2f BB |
632 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_DEVID, &vd->vdev_devid) == 0) |
633 | vd->vdev_devid = spa_strdup(vd->vdev_devid); | |
634 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PHYS_PATH, | |
635 | &vd->vdev_physpath) == 0) | |
636 | vd->vdev_physpath = spa_strdup(vd->vdev_physpath); | |
1bbd8770 TH |
637 | |
638 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, | |
639 | &vd->vdev_enc_sysfs_path) == 0) | |
640 | vd->vdev_enc_sysfs_path = spa_strdup(vd->vdev_enc_sysfs_path); | |
641 | ||
9babb374 BB |
642 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_FRU, &vd->vdev_fru) == 0) |
643 | vd->vdev_fru = spa_strdup(vd->vdev_fru); | |
34dc7c2f BB |
644 | |
645 | /* | |
646 | * Set the whole_disk property. If it's not specified, leave the value | |
647 | * as -1. | |
648 | */ | |
649 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, | |
650 | &vd->vdev_wholedisk) != 0) | |
651 | vd->vdev_wholedisk = -1ULL; | |
652 | ||
a1d477c2 MA |
653 | ASSERT0(vic->vic_mapping_object); |
654 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_INDIRECT_OBJECT, | |
655 | &vic->vic_mapping_object); | |
656 | ASSERT0(vic->vic_births_object); | |
657 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_INDIRECT_BIRTHS, | |
658 | &vic->vic_births_object); | |
659 | ASSERT3U(vic->vic_prev_indirect_vdev, ==, UINT64_MAX); | |
660 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_PREV_INDIRECT_VDEV, | |
661 | &vic->vic_prev_indirect_vdev); | |
662 | ||
34dc7c2f BB |
663 | /* |
664 | * Look for the 'not present' flag. This will only be set if the device | |
665 | * was not present at the time of import. | |
666 | */ | |
9babb374 BB |
667 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, |
668 | &vd->vdev_not_present); | |
34dc7c2f BB |
669 | |
670 | /* | |
671 | * Get the alignment requirement. | |
672 | */ | |
673 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASHIFT, &vd->vdev_ashift); | |
674 | ||
428870ff BB |
675 | /* |
676 | * Retrieve the vdev creation time. | |
677 | */ | |
678 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, | |
679 | &vd->vdev_crtxg); | |
680 | ||
34dc7c2f BB |
681 | /* |
682 | * If we're a top-level vdev, try to load the allocation parameters. | |
683 | */ | |
428870ff BB |
684 | if (parent && !parent->vdev_parent && |
685 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { | |
34dc7c2f BB |
686 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, |
687 | &vd->vdev_ms_array); | |
688 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
689 | &vd->vdev_ms_shift); | |
690 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
691 | &vd->vdev_asize); | |
428870ff BB |
692 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVING, |
693 | &vd->vdev_removing); | |
e0ab3ab5 JS |
694 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_VDEV_TOP_ZAP, |
695 | &vd->vdev_top_zap); | |
696 | } else { | |
697 | ASSERT0(vd->vdev_top_zap); | |
428870ff BB |
698 | } |
699 | ||
5ffb9d1d | 700 | if (parent && !parent->vdev_parent && alloctype != VDEV_ALLOC_ATTACH) { |
428870ff BB |
701 | ASSERT(alloctype == VDEV_ALLOC_LOAD || |
702 | alloctype == VDEV_ALLOC_ADD || | |
703 | alloctype == VDEV_ALLOC_SPLIT || | |
704 | alloctype == VDEV_ALLOC_ROOTPOOL); | |
705 | vd->vdev_mg = metaslab_group_create(islog ? | |
706 | spa_log_class(spa) : spa_normal_class(spa), vd); | |
34dc7c2f BB |
707 | } |
708 | ||
e0ab3ab5 JS |
709 | if (vd->vdev_ops->vdev_op_leaf && |
710 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_SPLIT)) { | |
711 | (void) nvlist_lookup_uint64(nv, | |
712 | ZPOOL_CONFIG_VDEV_LEAF_ZAP, &vd->vdev_leaf_zap); | |
713 | } else { | |
714 | ASSERT0(vd->vdev_leaf_zap); | |
715 | } | |
716 | ||
34dc7c2f BB |
717 | /* |
718 | * If we're a leaf vdev, try to load the DTL object and other state. | |
719 | */ | |
e0ab3ab5 | 720 | |
b128c09f | 721 | if (vd->vdev_ops->vdev_op_leaf && |
9babb374 BB |
722 | (alloctype == VDEV_ALLOC_LOAD || alloctype == VDEV_ALLOC_L2CACHE || |
723 | alloctype == VDEV_ALLOC_ROOTPOOL)) { | |
b128c09f BB |
724 | if (alloctype == VDEV_ALLOC_LOAD) { |
725 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DTL, | |
93cf2076 | 726 | &vd->vdev_dtl_object); |
b128c09f BB |
727 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_UNSPARE, |
728 | &vd->vdev_unspare); | |
729 | } | |
9babb374 BB |
730 | |
731 | if (alloctype == VDEV_ALLOC_ROOTPOOL) { | |
732 | uint64_t spare = 0; | |
733 | ||
734 | if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_IS_SPARE, | |
735 | &spare) == 0 && spare) | |
736 | spa_spare_add(vd); | |
737 | } | |
738 | ||
34dc7c2f BB |
739 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_OFFLINE, |
740 | &vd->vdev_offline); | |
b128c09f | 741 | |
5d1f7fb6 GW |
742 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_RESILVER_TXG, |
743 | &vd->vdev_resilver_txg); | |
572e2857 | 744 | |
34dc7c2f | 745 | /* |
4a283c7f TH |
746 | * In general, when importing a pool we want to ignore the |
747 | * persistent fault state, as the diagnosis made on another | |
748 | * system may not be valid in the current context. The only | |
749 | * exception is if we forced a vdev to a persistently faulted | |
750 | * state with 'zpool offline -f'. The persistent fault will | |
751 | * remain across imports until cleared. | |
752 | * | |
753 | * Local vdevs will remain in the faulted state. | |
34dc7c2f | 754 | */ |
4a283c7f TH |
755 | if (spa_load_state(spa) == SPA_LOAD_OPEN || |
756 | spa_load_state(spa) == SPA_LOAD_IMPORT) { | |
34dc7c2f BB |
757 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_FAULTED, |
758 | &vd->vdev_faulted); | |
759 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_DEGRADED, | |
760 | &vd->vdev_degraded); | |
761 | (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_REMOVED, | |
762 | &vd->vdev_removed); | |
428870ff BB |
763 | |
764 | if (vd->vdev_faulted || vd->vdev_degraded) { | |
765 | char *aux; | |
766 | ||
767 | vd->vdev_label_aux = | |
768 | VDEV_AUX_ERR_EXCEEDED; | |
769 | if (nvlist_lookup_string(nv, | |
770 | ZPOOL_CONFIG_AUX_STATE, &aux) == 0 && | |
771 | strcmp(aux, "external") == 0) | |
772 | vd->vdev_label_aux = VDEV_AUX_EXTERNAL; | |
a0ad7ca5 TC |
773 | else |
774 | vd->vdev_faulted = 0ULL; | |
428870ff | 775 | } |
34dc7c2f BB |
776 | } |
777 | } | |
778 | ||
779 | /* | |
780 | * Add ourselves to the parent's list of children. | |
781 | */ | |
782 | vdev_add_child(parent, vd); | |
783 | ||
784 | *vdp = vd; | |
785 | ||
786 | return (0); | |
787 | } | |
788 | ||
789 | void | |
790 | vdev_free(vdev_t *vd) | |
791 | { | |
34dc7c2f BB |
792 | spa_t *spa = vd->vdev_spa; |
793 | ||
d4a72f23 TC |
794 | /* |
795 | * Scan queues are normally destroyed at the end of a scan. If the | |
796 | * queue exists here, that implies the vdev is being removed while | |
797 | * the scan is still running. | |
798 | */ | |
799 | if (vd->vdev_scan_io_queue != NULL) { | |
800 | mutex_enter(&vd->vdev_scan_io_queue_lock); | |
801 | dsl_scan_io_queue_destroy(vd->vdev_scan_io_queue); | |
802 | vd->vdev_scan_io_queue = NULL; | |
803 | mutex_exit(&vd->vdev_scan_io_queue_lock); | |
804 | } | |
805 | ||
34dc7c2f BB |
806 | /* |
807 | * vdev_free() implies closing the vdev first. This is simpler than | |
808 | * trying to ensure complicated semantics for all callers. | |
809 | */ | |
810 | vdev_close(vd); | |
811 | ||
b128c09f | 812 | ASSERT(!list_link_active(&vd->vdev_config_dirty_node)); |
428870ff | 813 | ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); |
34dc7c2f BB |
814 | |
815 | /* | |
816 | * Free all children. | |
817 | */ | |
1c27024e | 818 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
819 | vdev_free(vd->vdev_child[c]); |
820 | ||
821 | ASSERT(vd->vdev_child == NULL); | |
822 | ASSERT(vd->vdev_guid_sum == vd->vdev_guid); | |
823 | ||
824 | /* | |
825 | * Discard allocation state. | |
826 | */ | |
428870ff | 827 | if (vd->vdev_mg != NULL) { |
34dc7c2f | 828 | vdev_metaslab_fini(vd); |
428870ff BB |
829 | metaslab_group_destroy(vd->vdev_mg); |
830 | } | |
34dc7c2f | 831 | |
c99c9001 MS |
832 | ASSERT0(vd->vdev_stat.vs_space); |
833 | ASSERT0(vd->vdev_stat.vs_dspace); | |
834 | ASSERT0(vd->vdev_stat.vs_alloc); | |
34dc7c2f BB |
835 | |
836 | /* | |
837 | * Remove this vdev from its parent's child list. | |
838 | */ | |
839 | vdev_remove_child(vd->vdev_parent, vd); | |
840 | ||
841 | ASSERT(vd->vdev_parent == NULL); | |
842 | ||
843 | /* | |
844 | * Clean up vdev structure. | |
845 | */ | |
846 | vdev_queue_fini(vd); | |
847 | vdev_cache_fini(vd); | |
848 | ||
849 | if (vd->vdev_path) | |
850 | spa_strfree(vd->vdev_path); | |
851 | if (vd->vdev_devid) | |
852 | spa_strfree(vd->vdev_devid); | |
853 | if (vd->vdev_physpath) | |
854 | spa_strfree(vd->vdev_physpath); | |
1bbd8770 TH |
855 | |
856 | if (vd->vdev_enc_sysfs_path) | |
857 | spa_strfree(vd->vdev_enc_sysfs_path); | |
858 | ||
9babb374 BB |
859 | if (vd->vdev_fru) |
860 | spa_strfree(vd->vdev_fru); | |
34dc7c2f BB |
861 | |
862 | if (vd->vdev_isspare) | |
863 | spa_spare_remove(vd); | |
864 | if (vd->vdev_isl2cache) | |
865 | spa_l2cache_remove(vd); | |
866 | ||
867 | txg_list_destroy(&vd->vdev_ms_list); | |
868 | txg_list_destroy(&vd->vdev_dtl_list); | |
fb5f0bc8 | 869 | |
34dc7c2f | 870 | mutex_enter(&vd->vdev_dtl_lock); |
93cf2076 | 871 | space_map_close(vd->vdev_dtl_sm); |
1c27024e | 872 | for (int t = 0; t < DTL_TYPES; t++) { |
93cf2076 GW |
873 | range_tree_vacate(vd->vdev_dtl[t], NULL, NULL); |
874 | range_tree_destroy(vd->vdev_dtl[t]); | |
fb5f0bc8 | 875 | } |
34dc7c2f | 876 | mutex_exit(&vd->vdev_dtl_lock); |
fb5f0bc8 | 877 | |
a1d477c2 MA |
878 | EQUIV(vd->vdev_indirect_births != NULL, |
879 | vd->vdev_indirect_mapping != NULL); | |
880 | if (vd->vdev_indirect_births != NULL) { | |
881 | vdev_indirect_mapping_close(vd->vdev_indirect_mapping); | |
882 | vdev_indirect_births_close(vd->vdev_indirect_births); | |
883 | } | |
884 | ||
885 | if (vd->vdev_obsolete_sm != NULL) { | |
886 | ASSERT(vd->vdev_removing || | |
887 | vd->vdev_ops == &vdev_indirect_ops); | |
888 | space_map_close(vd->vdev_obsolete_sm); | |
889 | vd->vdev_obsolete_sm = NULL; | |
890 | } | |
891 | range_tree_destroy(vd->vdev_obsolete_segments); | |
892 | rw_destroy(&vd->vdev_indirect_rwlock); | |
893 | mutex_destroy(&vd->vdev_obsolete_lock); | |
894 | ||
3dfb57a3 | 895 | mutex_destroy(&vd->vdev_queue_lock); |
34dc7c2f BB |
896 | mutex_destroy(&vd->vdev_dtl_lock); |
897 | mutex_destroy(&vd->vdev_stat_lock); | |
b128c09f | 898 | mutex_destroy(&vd->vdev_probe_lock); |
d4a72f23 | 899 | mutex_destroy(&vd->vdev_scan_io_queue_lock); |
34dc7c2f | 900 | |
c17486b2 GN |
901 | zfs_ratelimit_fini(&vd->vdev_delay_rl); |
902 | zfs_ratelimit_fini(&vd->vdev_checksum_rl); | |
903 | ||
34dc7c2f BB |
904 | if (vd == spa->spa_root_vdev) |
905 | spa->spa_root_vdev = NULL; | |
906 | ||
907 | kmem_free(vd, sizeof (vdev_t)); | |
908 | } | |
909 | ||
910 | /* | |
911 | * Transfer top-level vdev state from svd to tvd. | |
912 | */ | |
913 | static void | |
914 | vdev_top_transfer(vdev_t *svd, vdev_t *tvd) | |
915 | { | |
916 | spa_t *spa = svd->vdev_spa; | |
917 | metaslab_t *msp; | |
918 | vdev_t *vd; | |
919 | int t; | |
920 | ||
921 | ASSERT(tvd == tvd->vdev_top); | |
922 | ||
77943bc1 | 923 | tvd->vdev_pending_fastwrite = svd->vdev_pending_fastwrite; |
34dc7c2f BB |
924 | tvd->vdev_ms_array = svd->vdev_ms_array; |
925 | tvd->vdev_ms_shift = svd->vdev_ms_shift; | |
926 | tvd->vdev_ms_count = svd->vdev_ms_count; | |
e0ab3ab5 | 927 | tvd->vdev_top_zap = svd->vdev_top_zap; |
34dc7c2f BB |
928 | |
929 | svd->vdev_ms_array = 0; | |
930 | svd->vdev_ms_shift = 0; | |
931 | svd->vdev_ms_count = 0; | |
e0ab3ab5 | 932 | svd->vdev_top_zap = 0; |
34dc7c2f | 933 | |
5ffb9d1d GW |
934 | if (tvd->vdev_mg) |
935 | ASSERT3P(tvd->vdev_mg, ==, svd->vdev_mg); | |
34dc7c2f BB |
936 | tvd->vdev_mg = svd->vdev_mg; |
937 | tvd->vdev_ms = svd->vdev_ms; | |
938 | ||
939 | svd->vdev_mg = NULL; | |
940 | svd->vdev_ms = NULL; | |
941 | ||
942 | if (tvd->vdev_mg != NULL) | |
943 | tvd->vdev_mg->mg_vd = tvd; | |
944 | ||
d2734cce SD |
945 | tvd->vdev_checkpoint_sm = svd->vdev_checkpoint_sm; |
946 | svd->vdev_checkpoint_sm = NULL; | |
947 | ||
34dc7c2f BB |
948 | tvd->vdev_stat.vs_alloc = svd->vdev_stat.vs_alloc; |
949 | tvd->vdev_stat.vs_space = svd->vdev_stat.vs_space; | |
950 | tvd->vdev_stat.vs_dspace = svd->vdev_stat.vs_dspace; | |
951 | ||
952 | svd->vdev_stat.vs_alloc = 0; | |
953 | svd->vdev_stat.vs_space = 0; | |
954 | svd->vdev_stat.vs_dspace = 0; | |
955 | ||
9e052db4 MA |
956 | /* |
957 | * State which may be set on a top-level vdev that's in the | |
958 | * process of being removed. | |
959 | */ | |
960 | ASSERT0(tvd->vdev_indirect_config.vic_births_object); | |
961 | ASSERT0(tvd->vdev_indirect_config.vic_mapping_object); | |
962 | ASSERT3U(tvd->vdev_indirect_config.vic_prev_indirect_vdev, ==, -1ULL); | |
963 | ASSERT3P(tvd->vdev_indirect_mapping, ==, NULL); | |
964 | ASSERT3P(tvd->vdev_indirect_births, ==, NULL); | |
965 | ASSERT3P(tvd->vdev_obsolete_sm, ==, NULL); | |
966 | ASSERT0(tvd->vdev_removing); | |
967 | tvd->vdev_removing = svd->vdev_removing; | |
968 | tvd->vdev_indirect_config = svd->vdev_indirect_config; | |
969 | tvd->vdev_indirect_mapping = svd->vdev_indirect_mapping; | |
970 | tvd->vdev_indirect_births = svd->vdev_indirect_births; | |
971 | range_tree_swap(&svd->vdev_obsolete_segments, | |
972 | &tvd->vdev_obsolete_segments); | |
973 | tvd->vdev_obsolete_sm = svd->vdev_obsolete_sm; | |
974 | svd->vdev_indirect_config.vic_mapping_object = 0; | |
975 | svd->vdev_indirect_config.vic_births_object = 0; | |
976 | svd->vdev_indirect_config.vic_prev_indirect_vdev = -1ULL; | |
977 | svd->vdev_indirect_mapping = NULL; | |
978 | svd->vdev_indirect_births = NULL; | |
979 | svd->vdev_obsolete_sm = NULL; | |
980 | svd->vdev_removing = 0; | |
981 | ||
34dc7c2f BB |
982 | for (t = 0; t < TXG_SIZE; t++) { |
983 | while ((msp = txg_list_remove(&svd->vdev_ms_list, t)) != NULL) | |
984 | (void) txg_list_add(&tvd->vdev_ms_list, msp, t); | |
985 | while ((vd = txg_list_remove(&svd->vdev_dtl_list, t)) != NULL) | |
986 | (void) txg_list_add(&tvd->vdev_dtl_list, vd, t); | |
987 | if (txg_list_remove_this(&spa->spa_vdev_txg_list, svd, t)) | |
988 | (void) txg_list_add(&spa->spa_vdev_txg_list, tvd, t); | |
989 | } | |
990 | ||
b128c09f | 991 | if (list_link_active(&svd->vdev_config_dirty_node)) { |
34dc7c2f BB |
992 | vdev_config_clean(svd); |
993 | vdev_config_dirty(tvd); | |
994 | } | |
995 | ||
b128c09f BB |
996 | if (list_link_active(&svd->vdev_state_dirty_node)) { |
997 | vdev_state_clean(svd); | |
998 | vdev_state_dirty(tvd); | |
999 | } | |
1000 | ||
34dc7c2f BB |
1001 | tvd->vdev_deflate_ratio = svd->vdev_deflate_ratio; |
1002 | svd->vdev_deflate_ratio = 0; | |
1003 | ||
1004 | tvd->vdev_islog = svd->vdev_islog; | |
1005 | svd->vdev_islog = 0; | |
d4a72f23 TC |
1006 | |
1007 | dsl_scan_io_queue_vdev_xfer(svd, tvd); | |
34dc7c2f BB |
1008 | } |
1009 | ||
1010 | static void | |
1011 | vdev_top_update(vdev_t *tvd, vdev_t *vd) | |
1012 | { | |
34dc7c2f BB |
1013 | if (vd == NULL) |
1014 | return; | |
1015 | ||
1016 | vd->vdev_top = tvd; | |
1017 | ||
1c27024e | 1018 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
1019 | vdev_top_update(tvd, vd->vdev_child[c]); |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * Add a mirror/replacing vdev above an existing vdev. | |
1024 | */ | |
1025 | vdev_t * | |
1026 | vdev_add_parent(vdev_t *cvd, vdev_ops_t *ops) | |
1027 | { | |
1028 | spa_t *spa = cvd->vdev_spa; | |
1029 | vdev_t *pvd = cvd->vdev_parent; | |
1030 | vdev_t *mvd; | |
1031 | ||
b128c09f | 1032 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
1033 | |
1034 | mvd = vdev_alloc_common(spa, cvd->vdev_id, 0, ops); | |
1035 | ||
1036 | mvd->vdev_asize = cvd->vdev_asize; | |
9babb374 | 1037 | mvd->vdev_min_asize = cvd->vdev_min_asize; |
1bd201e7 | 1038 | mvd->vdev_max_asize = cvd->vdev_max_asize; |
a1d477c2 | 1039 | mvd->vdev_psize = cvd->vdev_psize; |
34dc7c2f BB |
1040 | mvd->vdev_ashift = cvd->vdev_ashift; |
1041 | mvd->vdev_state = cvd->vdev_state; | |
428870ff | 1042 | mvd->vdev_crtxg = cvd->vdev_crtxg; |
34dc7c2f BB |
1043 | |
1044 | vdev_remove_child(pvd, cvd); | |
1045 | vdev_add_child(pvd, mvd); | |
1046 | cvd->vdev_id = mvd->vdev_children; | |
1047 | vdev_add_child(mvd, cvd); | |
1048 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); | |
1049 | ||
1050 | if (mvd == mvd->vdev_top) | |
1051 | vdev_top_transfer(cvd, mvd); | |
1052 | ||
1053 | return (mvd); | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | * Remove a 1-way mirror/replacing vdev from the tree. | |
1058 | */ | |
1059 | void | |
1060 | vdev_remove_parent(vdev_t *cvd) | |
1061 | { | |
1062 | vdev_t *mvd = cvd->vdev_parent; | |
1063 | vdev_t *pvd = mvd->vdev_parent; | |
1064 | ||
b128c09f | 1065 | ASSERT(spa_config_held(cvd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f BB |
1066 | |
1067 | ASSERT(mvd->vdev_children == 1); | |
1068 | ASSERT(mvd->vdev_ops == &vdev_mirror_ops || | |
1069 | mvd->vdev_ops == &vdev_replacing_ops || | |
1070 | mvd->vdev_ops == &vdev_spare_ops); | |
1071 | cvd->vdev_ashift = mvd->vdev_ashift; | |
1072 | ||
1073 | vdev_remove_child(mvd, cvd); | |
1074 | vdev_remove_child(pvd, mvd); | |
fb5f0bc8 | 1075 | |
34dc7c2f | 1076 | /* |
b128c09f BB |
1077 | * If cvd will replace mvd as a top-level vdev, preserve mvd's guid. |
1078 | * Otherwise, we could have detached an offline device, and when we | |
1079 | * go to import the pool we'll think we have two top-level vdevs, | |
1080 | * instead of a different version of the same top-level vdev. | |
34dc7c2f | 1081 | */ |
fb5f0bc8 BB |
1082 | if (mvd->vdev_top == mvd) { |
1083 | uint64_t guid_delta = mvd->vdev_guid - cvd->vdev_guid; | |
428870ff | 1084 | cvd->vdev_orig_guid = cvd->vdev_guid; |
fb5f0bc8 BB |
1085 | cvd->vdev_guid += guid_delta; |
1086 | cvd->vdev_guid_sum += guid_delta; | |
61e99a73 AB |
1087 | |
1088 | /* | |
1089 | * If pool not set for autoexpand, we need to also preserve | |
1090 | * mvd's asize to prevent automatic expansion of cvd. | |
1091 | * Otherwise if we are adjusting the mirror by attaching and | |
1092 | * detaching children of non-uniform sizes, the mirror could | |
1093 | * autoexpand, unexpectedly requiring larger devices to | |
1094 | * re-establish the mirror. | |
1095 | */ | |
1096 | if (!cvd->vdev_spa->spa_autoexpand) | |
1097 | cvd->vdev_asize = mvd->vdev_asize; | |
fb5f0bc8 | 1098 | } |
b128c09f BB |
1099 | cvd->vdev_id = mvd->vdev_id; |
1100 | vdev_add_child(pvd, cvd); | |
34dc7c2f BB |
1101 | vdev_top_update(cvd->vdev_top, cvd->vdev_top); |
1102 | ||
1103 | if (cvd == cvd->vdev_top) | |
1104 | vdev_top_transfer(mvd, cvd); | |
1105 | ||
1106 | ASSERT(mvd->vdev_children == 0); | |
1107 | vdev_free(mvd); | |
1108 | } | |
1109 | ||
1110 | int | |
1111 | vdev_metaslab_init(vdev_t *vd, uint64_t txg) | |
1112 | { | |
1113 | spa_t *spa = vd->vdev_spa; | |
1114 | objset_t *mos = spa->spa_meta_objset; | |
34dc7c2f BB |
1115 | uint64_t m; |
1116 | uint64_t oldc = vd->vdev_ms_count; | |
1117 | uint64_t newc = vd->vdev_asize >> vd->vdev_ms_shift; | |
1118 | metaslab_t **mspp; | |
1119 | int error; | |
1120 | ||
428870ff BB |
1121 | ASSERT(txg == 0 || spa_config_held(spa, SCL_ALLOC, RW_WRITER)); |
1122 | ||
1123 | /* | |
1124 | * This vdev is not being allocated from yet or is a hole. | |
1125 | */ | |
1126 | if (vd->vdev_ms_shift == 0) | |
34dc7c2f BB |
1127 | return (0); |
1128 | ||
428870ff BB |
1129 | ASSERT(!vd->vdev_ishole); |
1130 | ||
34dc7c2f BB |
1131 | ASSERT(oldc <= newc); |
1132 | ||
bffb68a2 | 1133 | mspp = vmem_zalloc(newc * sizeof (*mspp), KM_SLEEP); |
34dc7c2f BB |
1134 | |
1135 | if (oldc != 0) { | |
1136 | bcopy(vd->vdev_ms, mspp, oldc * sizeof (*mspp)); | |
bffb68a2 | 1137 | vmem_free(vd->vdev_ms, oldc * sizeof (*mspp)); |
34dc7c2f BB |
1138 | } |
1139 | ||
1140 | vd->vdev_ms = mspp; | |
1141 | vd->vdev_ms_count = newc; | |
1142 | ||
1143 | for (m = oldc; m < newc; m++) { | |
93cf2076 GW |
1144 | uint64_t object = 0; |
1145 | ||
a1d477c2 MA |
1146 | /* |
1147 | * vdev_ms_array may be 0 if we are creating the "fake" | |
1148 | * metaslabs for an indirect vdev for zdb's leak detection. | |
1149 | * See zdb_leak_init(). | |
1150 | */ | |
1151 | if (txg == 0 && vd->vdev_ms_array != 0) { | |
34dc7c2f | 1152 | error = dmu_read(mos, vd->vdev_ms_array, |
9babb374 BB |
1153 | m * sizeof (uint64_t), sizeof (uint64_t), &object, |
1154 | DMU_READ_PREFETCH); | |
4a0ee12a PZ |
1155 | if (error != 0) { |
1156 | vdev_dbgmsg(vd, "unable to read the metaslab " | |
1157 | "array [error=%d]", error); | |
34dc7c2f | 1158 | return (error); |
4a0ee12a | 1159 | } |
34dc7c2f | 1160 | } |
fb42a493 PS |
1161 | |
1162 | error = metaslab_init(vd->vdev_mg, m, object, txg, | |
1163 | &(vd->vdev_ms[m])); | |
4a0ee12a PZ |
1164 | if (error != 0) { |
1165 | vdev_dbgmsg(vd, "metaslab_init failed [error=%d]", | |
1166 | error); | |
fb42a493 | 1167 | return (error); |
4a0ee12a | 1168 | } |
34dc7c2f BB |
1169 | } |
1170 | ||
428870ff BB |
1171 | if (txg == 0) |
1172 | spa_config_enter(spa, SCL_ALLOC, FTAG, RW_WRITER); | |
1173 | ||
1174 | /* | |
1175 | * If the vdev is being removed we don't activate | |
1176 | * the metaslabs since we want to ensure that no new | |
1177 | * allocations are performed on this device. | |
1178 | */ | |
1179 | if (oldc == 0 && !vd->vdev_removing) | |
1180 | metaslab_group_activate(vd->vdev_mg); | |
1181 | ||
1182 | if (txg == 0) | |
1183 | spa_config_exit(spa, SCL_ALLOC, FTAG); | |
1184 | ||
34dc7c2f BB |
1185 | return (0); |
1186 | } | |
1187 | ||
1188 | void | |
1189 | vdev_metaslab_fini(vdev_t *vd) | |
1190 | { | |
d2734cce SD |
1191 | if (vd->vdev_checkpoint_sm != NULL) { |
1192 | ASSERT(spa_feature_is_active(vd->vdev_spa, | |
1193 | SPA_FEATURE_POOL_CHECKPOINT)); | |
1194 | space_map_close(vd->vdev_checkpoint_sm); | |
1195 | /* | |
1196 | * Even though we close the space map, we need to set its | |
1197 | * pointer to NULL. The reason is that vdev_metaslab_fini() | |
1198 | * may be called multiple times for certain operations | |
1199 | * (i.e. when destroying a pool) so we need to ensure that | |
1200 | * this clause never executes twice. This logic is similar | |
1201 | * to the one used for the vdev_ms clause below. | |
1202 | */ | |
1203 | vd->vdev_checkpoint_sm = NULL; | |
1204 | } | |
1205 | ||
34dc7c2f | 1206 | if (vd->vdev_ms != NULL) { |
a1d477c2 MA |
1207 | uint64_t count = vd->vdev_ms_count; |
1208 | ||
428870ff | 1209 | metaslab_group_passivate(vd->vdev_mg); |
a1d477c2 | 1210 | for (uint64_t m = 0; m < count; m++) { |
93cf2076 GW |
1211 | metaslab_t *msp = vd->vdev_ms[m]; |
1212 | ||
1213 | if (msp != NULL) | |
1214 | metaslab_fini(msp); | |
1215 | } | |
bffb68a2 | 1216 | vmem_free(vd->vdev_ms, count * sizeof (metaslab_t *)); |
34dc7c2f | 1217 | vd->vdev_ms = NULL; |
920dd524 | 1218 | |
a1d477c2 MA |
1219 | vd->vdev_ms_count = 0; |
1220 | } | |
1221 | ASSERT0(vd->vdev_ms_count); | |
920dd524 | 1222 | ASSERT3U(vd->vdev_pending_fastwrite, ==, 0); |
34dc7c2f BB |
1223 | } |
1224 | ||
b128c09f BB |
1225 | typedef struct vdev_probe_stats { |
1226 | boolean_t vps_readable; | |
1227 | boolean_t vps_writeable; | |
1228 | int vps_flags; | |
b128c09f BB |
1229 | } vdev_probe_stats_t; |
1230 | ||
1231 | static void | |
1232 | vdev_probe_done(zio_t *zio) | |
34dc7c2f | 1233 | { |
fb5f0bc8 | 1234 | spa_t *spa = zio->io_spa; |
d164b209 | 1235 | vdev_t *vd = zio->io_vd; |
b128c09f | 1236 | vdev_probe_stats_t *vps = zio->io_private; |
d164b209 BB |
1237 | |
1238 | ASSERT(vd->vdev_probe_zio != NULL); | |
b128c09f BB |
1239 | |
1240 | if (zio->io_type == ZIO_TYPE_READ) { | |
b128c09f BB |
1241 | if (zio->io_error == 0) |
1242 | vps->vps_readable = 1; | |
fb5f0bc8 | 1243 | if (zio->io_error == 0 && spa_writeable(spa)) { |
d164b209 | 1244 | zio_nowait(zio_write_phys(vd->vdev_probe_zio, vd, |
a6255b7f | 1245 | zio->io_offset, zio->io_size, zio->io_abd, |
b128c09f BB |
1246 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, |
1247 | ZIO_PRIORITY_SYNC_WRITE, vps->vps_flags, B_TRUE)); | |
1248 | } else { | |
a6255b7f | 1249 | abd_free(zio->io_abd); |
b128c09f BB |
1250 | } |
1251 | } else if (zio->io_type == ZIO_TYPE_WRITE) { | |
b128c09f BB |
1252 | if (zio->io_error == 0) |
1253 | vps->vps_writeable = 1; | |
a6255b7f | 1254 | abd_free(zio->io_abd); |
b128c09f | 1255 | } else if (zio->io_type == ZIO_TYPE_NULL) { |
d164b209 | 1256 | zio_t *pio; |
3dfb57a3 | 1257 | zio_link_t *zl; |
b128c09f BB |
1258 | |
1259 | vd->vdev_cant_read |= !vps->vps_readable; | |
1260 | vd->vdev_cant_write |= !vps->vps_writeable; | |
1261 | ||
1262 | if (vdev_readable(vd) && | |
fb5f0bc8 | 1263 | (vdev_writeable(vd) || !spa_writeable(spa))) { |
b128c09f BB |
1264 | zio->io_error = 0; |
1265 | } else { | |
1266 | ASSERT(zio->io_error != 0); | |
4a0ee12a | 1267 | vdev_dbgmsg(vd, "failed probe"); |
b128c09f | 1268 | zfs_ereport_post(FM_EREPORT_ZFS_PROBE_FAILURE, |
b5256303 | 1269 | spa, vd, NULL, NULL, 0, 0); |
2e528b49 | 1270 | zio->io_error = SET_ERROR(ENXIO); |
b128c09f | 1271 | } |
d164b209 BB |
1272 | |
1273 | mutex_enter(&vd->vdev_probe_lock); | |
1274 | ASSERT(vd->vdev_probe_zio == zio); | |
1275 | vd->vdev_probe_zio = NULL; | |
1276 | mutex_exit(&vd->vdev_probe_lock); | |
1277 | ||
3dfb57a3 DB |
1278 | zl = NULL; |
1279 | while ((pio = zio_walk_parents(zio, &zl)) != NULL) | |
d164b209 | 1280 | if (!vdev_accessible(vd, pio)) |
2e528b49 | 1281 | pio->io_error = SET_ERROR(ENXIO); |
d164b209 | 1282 | |
b128c09f BB |
1283 | kmem_free(vps, sizeof (*vps)); |
1284 | } | |
1285 | } | |
34dc7c2f | 1286 | |
b128c09f | 1287 | /* |
d3cc8b15 WA |
1288 | * Determine whether this device is accessible. |
1289 | * | |
1290 | * Read and write to several known locations: the pad regions of each | |
1291 | * vdev label but the first, which we leave alone in case it contains | |
1292 | * a VTOC. | |
b128c09f BB |
1293 | */ |
1294 | zio_t * | |
d164b209 | 1295 | vdev_probe(vdev_t *vd, zio_t *zio) |
b128c09f BB |
1296 | { |
1297 | spa_t *spa = vd->vdev_spa; | |
d164b209 BB |
1298 | vdev_probe_stats_t *vps = NULL; |
1299 | zio_t *pio; | |
1300 | ||
1301 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
34dc7c2f | 1302 | |
d164b209 BB |
1303 | /* |
1304 | * Don't probe the probe. | |
1305 | */ | |
1306 | if (zio && (zio->io_flags & ZIO_FLAG_PROBE)) | |
1307 | return (NULL); | |
b128c09f | 1308 | |
d164b209 BB |
1309 | /* |
1310 | * To prevent 'probe storms' when a device fails, we create | |
1311 | * just one probe i/o at a time. All zios that want to probe | |
1312 | * this vdev will become parents of the probe io. | |
1313 | */ | |
1314 | mutex_enter(&vd->vdev_probe_lock); | |
b128c09f | 1315 | |
d164b209 | 1316 | if ((pio = vd->vdev_probe_zio) == NULL) { |
79c76d5b | 1317 | vps = kmem_zalloc(sizeof (*vps), KM_SLEEP); |
d164b209 BB |
1318 | |
1319 | vps->vps_flags = ZIO_FLAG_CANFAIL | ZIO_FLAG_PROBE | | |
1320 | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_AGGREGATE | | |
9babb374 | 1321 | ZIO_FLAG_TRYHARD; |
d164b209 BB |
1322 | |
1323 | if (spa_config_held(spa, SCL_ZIO, RW_WRITER)) { | |
1324 | /* | |
1325 | * vdev_cant_read and vdev_cant_write can only | |
1326 | * transition from TRUE to FALSE when we have the | |
1327 | * SCL_ZIO lock as writer; otherwise they can only | |
1328 | * transition from FALSE to TRUE. This ensures that | |
1329 | * any zio looking at these values can assume that | |
1330 | * failures persist for the life of the I/O. That's | |
1331 | * important because when a device has intermittent | |
1332 | * connectivity problems, we want to ensure that | |
1333 | * they're ascribed to the device (ENXIO) and not | |
1334 | * the zio (EIO). | |
1335 | * | |
1336 | * Since we hold SCL_ZIO as writer here, clear both | |
1337 | * values so the probe can reevaluate from first | |
1338 | * principles. | |
1339 | */ | |
1340 | vps->vps_flags |= ZIO_FLAG_CONFIG_WRITER; | |
1341 | vd->vdev_cant_read = B_FALSE; | |
1342 | vd->vdev_cant_write = B_FALSE; | |
1343 | } | |
1344 | ||
1345 | vd->vdev_probe_zio = pio = zio_null(NULL, spa, vd, | |
1346 | vdev_probe_done, vps, | |
1347 | vps->vps_flags | ZIO_FLAG_DONT_PROPAGATE); | |
1348 | ||
428870ff BB |
1349 | /* |
1350 | * We can't change the vdev state in this context, so we | |
1351 | * kick off an async task to do it on our behalf. | |
1352 | */ | |
d164b209 BB |
1353 | if (zio != NULL) { |
1354 | vd->vdev_probe_wanted = B_TRUE; | |
1355 | spa_async_request(spa, SPA_ASYNC_PROBE); | |
1356 | } | |
b128c09f BB |
1357 | } |
1358 | ||
d164b209 BB |
1359 | if (zio != NULL) |
1360 | zio_add_child(zio, pio); | |
b128c09f | 1361 | |
d164b209 | 1362 | mutex_exit(&vd->vdev_probe_lock); |
b128c09f | 1363 | |
d164b209 BB |
1364 | if (vps == NULL) { |
1365 | ASSERT(zio != NULL); | |
1366 | return (NULL); | |
1367 | } | |
b128c09f | 1368 | |
1c27024e | 1369 | for (int l = 1; l < VDEV_LABELS; l++) { |
d164b209 | 1370 | zio_nowait(zio_read_phys(pio, vd, |
b128c09f | 1371 | vdev_label_offset(vd->vdev_psize, l, |
a6255b7f DQ |
1372 | offsetof(vdev_label_t, vl_pad2)), VDEV_PAD_SIZE, |
1373 | abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE), | |
b128c09f BB |
1374 | ZIO_CHECKSUM_OFF, vdev_probe_done, vps, |
1375 | ZIO_PRIORITY_SYNC_READ, vps->vps_flags, B_TRUE)); | |
1376 | } | |
1377 | ||
d164b209 BB |
1378 | if (zio == NULL) |
1379 | return (pio); | |
1380 | ||
1381 | zio_nowait(pio); | |
1382 | return (NULL); | |
34dc7c2f BB |
1383 | } |
1384 | ||
45d1cae3 BB |
1385 | static void |
1386 | vdev_open_child(void *arg) | |
1387 | { | |
1388 | vdev_t *vd = arg; | |
1389 | ||
1390 | vd->vdev_open_thread = curthread; | |
1391 | vd->vdev_open_error = vdev_open(vd); | |
1392 | vd->vdev_open_thread = NULL; | |
1393 | } | |
1394 | ||
6c285672 | 1395 | static boolean_t |
428870ff BB |
1396 | vdev_uses_zvols(vdev_t *vd) |
1397 | { | |
6c285672 JL |
1398 | #ifdef _KERNEL |
1399 | if (zvol_is_zvol(vd->vdev_path)) | |
428870ff | 1400 | return (B_TRUE); |
6c285672 JL |
1401 | #endif |
1402 | ||
1c27024e | 1403 | for (int c = 0; c < vd->vdev_children; c++) |
428870ff BB |
1404 | if (vdev_uses_zvols(vd->vdev_child[c])) |
1405 | return (B_TRUE); | |
6c285672 | 1406 | |
428870ff BB |
1407 | return (B_FALSE); |
1408 | } | |
1409 | ||
45d1cae3 BB |
1410 | void |
1411 | vdev_open_children(vdev_t *vd) | |
1412 | { | |
1413 | taskq_t *tq; | |
1414 | int children = vd->vdev_children; | |
1415 | ||
428870ff BB |
1416 | /* |
1417 | * in order to handle pools on top of zvols, do the opens | |
1418 | * in a single thread so that the same thread holds the | |
1419 | * spa_namespace_lock | |
1420 | */ | |
1421 | if (vdev_uses_zvols(vd)) { | |
13d9a004 | 1422 | retry_sync: |
1c27024e | 1423 | for (int c = 0; c < children; c++) |
428870ff BB |
1424 | vd->vdev_child[c]->vdev_open_error = |
1425 | vdev_open(vd->vdev_child[c]); | |
4770aa06 HJ |
1426 | } else { |
1427 | tq = taskq_create("vdev_open", children, minclsyspri, | |
1428 | children, children, TASKQ_PREPOPULATE); | |
13d9a004 BB |
1429 | if (tq == NULL) |
1430 | goto retry_sync; | |
45d1cae3 | 1431 | |
1c27024e | 1432 | for (int c = 0; c < children; c++) |
4770aa06 | 1433 | VERIFY(taskq_dispatch(tq, vdev_open_child, |
48d3eb40 | 1434 | vd->vdev_child[c], TQ_SLEEP) != TASKQID_INVALID); |
45d1cae3 | 1435 | |
4770aa06 HJ |
1436 | taskq_destroy(tq); |
1437 | } | |
1438 | ||
1439 | vd->vdev_nonrot = B_TRUE; | |
fb40095f | 1440 | |
1c27024e | 1441 | for (int c = 0; c < children; c++) |
fb40095f | 1442 | vd->vdev_nonrot &= vd->vdev_child[c]->vdev_nonrot; |
45d1cae3 BB |
1443 | } |
1444 | ||
a1d477c2 MA |
1445 | /* |
1446 | * Compute the raidz-deflation ratio. Note, we hard-code | |
1447 | * in 128k (1 << 17) because it is the "typical" blocksize. | |
1448 | * Even though SPA_MAXBLOCKSIZE changed, this algorithm can not change, | |
1449 | * otherwise it would inconsistently account for existing bp's. | |
1450 | */ | |
1451 | static void | |
1452 | vdev_set_deflate_ratio(vdev_t *vd) | |
1453 | { | |
1454 | if (vd == vd->vdev_top && !vd->vdev_ishole && vd->vdev_ashift != 0) { | |
1455 | vd->vdev_deflate_ratio = (1 << 17) / | |
1456 | (vdev_psize_to_asize(vd, 1 << 17) >> SPA_MINBLOCKSHIFT); | |
1457 | } | |
1458 | } | |
1459 | ||
34dc7c2f BB |
1460 | /* |
1461 | * Prepare a virtual device for access. | |
1462 | */ | |
1463 | int | |
1464 | vdev_open(vdev_t *vd) | |
1465 | { | |
fb5f0bc8 | 1466 | spa_t *spa = vd->vdev_spa; |
34dc7c2f | 1467 | int error; |
34dc7c2f | 1468 | uint64_t osize = 0; |
1bd201e7 CS |
1469 | uint64_t max_osize = 0; |
1470 | uint64_t asize, max_asize, psize; | |
34dc7c2f BB |
1471 | uint64_t ashift = 0; |
1472 | ||
45d1cae3 BB |
1473 | ASSERT(vd->vdev_open_thread == curthread || |
1474 | spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
1475 | ASSERT(vd->vdev_state == VDEV_STATE_CLOSED || |
1476 | vd->vdev_state == VDEV_STATE_CANT_OPEN || | |
1477 | vd->vdev_state == VDEV_STATE_OFFLINE); | |
1478 | ||
34dc7c2f | 1479 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; |
9babb374 BB |
1480 | vd->vdev_cant_read = B_FALSE; |
1481 | vd->vdev_cant_write = B_FALSE; | |
1482 | vd->vdev_min_asize = vdev_get_min_asize(vd); | |
34dc7c2f | 1483 | |
428870ff BB |
1484 | /* |
1485 | * If this vdev is not removed, check its fault status. If it's | |
1486 | * faulted, bail out of the open. | |
1487 | */ | |
34dc7c2f BB |
1488 | if (!vd->vdev_removed && vd->vdev_faulted) { |
1489 | ASSERT(vd->vdev_children == 0); | |
428870ff BB |
1490 | ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || |
1491 | vd->vdev_label_aux == VDEV_AUX_EXTERNAL); | |
34dc7c2f | 1492 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, |
428870ff | 1493 | vd->vdev_label_aux); |
2e528b49 | 1494 | return (SET_ERROR(ENXIO)); |
34dc7c2f BB |
1495 | } else if (vd->vdev_offline) { |
1496 | ASSERT(vd->vdev_children == 0); | |
1497 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, VDEV_AUX_NONE); | |
2e528b49 | 1498 | return (SET_ERROR(ENXIO)); |
34dc7c2f BB |
1499 | } |
1500 | ||
1bd201e7 | 1501 | error = vd->vdev_ops->vdev_op_open(vd, &osize, &max_osize, &ashift); |
34dc7c2f | 1502 | |
428870ff BB |
1503 | /* |
1504 | * Reset the vdev_reopening flag so that we actually close | |
1505 | * the vdev on error. | |
1506 | */ | |
1507 | vd->vdev_reopening = B_FALSE; | |
34dc7c2f | 1508 | if (zio_injection_enabled && error == 0) |
9babb374 | 1509 | error = zio_handle_device_injection(vd, NULL, ENXIO); |
34dc7c2f BB |
1510 | |
1511 | if (error) { | |
1512 | if (vd->vdev_removed && | |
1513 | vd->vdev_stat.vs_aux != VDEV_AUX_OPEN_FAILED) | |
1514 | vd->vdev_removed = B_FALSE; | |
1515 | ||
6cb8e530 PZ |
1516 | if (vd->vdev_stat.vs_aux == VDEV_AUX_CHILDREN_OFFLINE) { |
1517 | vdev_set_state(vd, B_TRUE, VDEV_STATE_OFFLINE, | |
1518 | vd->vdev_stat.vs_aux); | |
1519 | } else { | |
1520 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1521 | vd->vdev_stat.vs_aux); | |
1522 | } | |
34dc7c2f BB |
1523 | return (error); |
1524 | } | |
1525 | ||
1526 | vd->vdev_removed = B_FALSE; | |
1527 | ||
428870ff BB |
1528 | /* |
1529 | * Recheck the faulted flag now that we have confirmed that | |
1530 | * the vdev is accessible. If we're faulted, bail. | |
1531 | */ | |
1532 | if (vd->vdev_faulted) { | |
1533 | ASSERT(vd->vdev_children == 0); | |
1534 | ASSERT(vd->vdev_label_aux == VDEV_AUX_ERR_EXCEEDED || | |
1535 | vd->vdev_label_aux == VDEV_AUX_EXTERNAL); | |
1536 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, | |
1537 | vd->vdev_label_aux); | |
2e528b49 | 1538 | return (SET_ERROR(ENXIO)); |
428870ff BB |
1539 | } |
1540 | ||
34dc7c2f BB |
1541 | if (vd->vdev_degraded) { |
1542 | ASSERT(vd->vdev_children == 0); | |
1543 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1544 | VDEV_AUX_ERR_EXCEEDED); | |
1545 | } else { | |
428870ff | 1546 | vdev_set_state(vd, B_TRUE, VDEV_STATE_HEALTHY, 0); |
34dc7c2f BB |
1547 | } |
1548 | ||
428870ff BB |
1549 | /* |
1550 | * For hole or missing vdevs we just return success. | |
1551 | */ | |
1552 | if (vd->vdev_ishole || vd->vdev_ops == &vdev_missing_ops) | |
1553 | return (0); | |
1554 | ||
1c27024e | 1555 | for (int c = 0; c < vd->vdev_children; c++) { |
34dc7c2f BB |
1556 | if (vd->vdev_child[c]->vdev_state != VDEV_STATE_HEALTHY) { |
1557 | vdev_set_state(vd, B_TRUE, VDEV_STATE_DEGRADED, | |
1558 | VDEV_AUX_NONE); | |
1559 | break; | |
1560 | } | |
9babb374 | 1561 | } |
34dc7c2f BB |
1562 | |
1563 | osize = P2ALIGN(osize, (uint64_t)sizeof (vdev_label_t)); | |
1bd201e7 | 1564 | max_osize = P2ALIGN(max_osize, (uint64_t)sizeof (vdev_label_t)); |
34dc7c2f BB |
1565 | |
1566 | if (vd->vdev_children == 0) { | |
1567 | if (osize < SPA_MINDEVSIZE) { | |
1568 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1569 | VDEV_AUX_TOO_SMALL); | |
2e528b49 | 1570 | return (SET_ERROR(EOVERFLOW)); |
34dc7c2f BB |
1571 | } |
1572 | psize = osize; | |
1573 | asize = osize - (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE); | |
1bd201e7 CS |
1574 | max_asize = max_osize - (VDEV_LABEL_START_SIZE + |
1575 | VDEV_LABEL_END_SIZE); | |
34dc7c2f BB |
1576 | } else { |
1577 | if (vd->vdev_parent != NULL && osize < SPA_MINDEVSIZE - | |
1578 | (VDEV_LABEL_START_SIZE + VDEV_LABEL_END_SIZE)) { | |
1579 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1580 | VDEV_AUX_TOO_SMALL); | |
2e528b49 | 1581 | return (SET_ERROR(EOVERFLOW)); |
34dc7c2f BB |
1582 | } |
1583 | psize = 0; | |
1584 | asize = osize; | |
1bd201e7 | 1585 | max_asize = max_osize; |
34dc7c2f BB |
1586 | } |
1587 | ||
9d3f7b87 OF |
1588 | /* |
1589 | * If the vdev was expanded, record this so that we can re-create the | |
1590 | * uberblock rings in labels {2,3}, during the next sync. | |
1591 | */ | |
1592 | if ((psize > vd->vdev_psize) && (vd->vdev_psize != 0)) | |
1593 | vd->vdev_copy_uberblocks = B_TRUE; | |
1594 | ||
34dc7c2f BB |
1595 | vd->vdev_psize = psize; |
1596 | ||
9babb374 | 1597 | /* |
2e215fec | 1598 | * Make sure the allocatable size hasn't shrunk too much. |
9babb374 BB |
1599 | */ |
1600 | if (asize < vd->vdev_min_asize) { | |
1601 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1602 | VDEV_AUX_BAD_LABEL); | |
2e528b49 | 1603 | return (SET_ERROR(EINVAL)); |
9babb374 BB |
1604 | } |
1605 | ||
34dc7c2f BB |
1606 | if (vd->vdev_asize == 0) { |
1607 | /* | |
1608 | * This is the first-ever open, so use the computed values. | |
b28e57cb | 1609 | * For compatibility, a different ashift can be requested. |
34dc7c2f BB |
1610 | */ |
1611 | vd->vdev_asize = asize; | |
1bd201e7 | 1612 | vd->vdev_max_asize = max_asize; |
ff61d1a4 | 1613 | if (vd->vdev_ashift == 0) { |
1614 | vd->vdev_ashift = ashift; /* use detected value */ | |
1615 | } | |
1616 | if (vd->vdev_ashift != 0 && (vd->vdev_ashift < ASHIFT_MIN || | |
1617 | vd->vdev_ashift > ASHIFT_MAX)) { | |
1618 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1619 | VDEV_AUX_BAD_ASHIFT); | |
1620 | return (SET_ERROR(EDOM)); | |
1621 | } | |
34dc7c2f BB |
1622 | } else { |
1623 | /* | |
32a9872b GW |
1624 | * Detect if the alignment requirement has increased. |
1625 | * We don't want to make the pool unavailable, just | |
1626 | * post an event instead. | |
34dc7c2f | 1627 | */ |
32a9872b GW |
1628 | if (ashift > vd->vdev_top->vdev_ashift && |
1629 | vd->vdev_ops->vdev_op_leaf) { | |
1630 | zfs_ereport_post(FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT, | |
b5256303 | 1631 | spa, vd, NULL, NULL, 0, 0); |
34dc7c2f | 1632 | } |
32a9872b | 1633 | |
1bd201e7 | 1634 | vd->vdev_max_asize = max_asize; |
9babb374 | 1635 | } |
34dc7c2f | 1636 | |
9babb374 | 1637 | /* |
2e215fec SH |
1638 | * If all children are healthy we update asize if either: |
1639 | * The asize has increased, due to a device expansion caused by dynamic | |
1640 | * LUN growth or vdev replacement, and automatic expansion is enabled; | |
1641 | * making the additional space available. | |
1642 | * | |
1643 | * The asize has decreased, due to a device shrink usually caused by a | |
1644 | * vdev replace with a smaller device. This ensures that calculations | |
1645 | * based of max_asize and asize e.g. esize are always valid. It's safe | |
1646 | * to do this as we've already validated that asize is greater than | |
1647 | * vdev_min_asize. | |
9babb374 | 1648 | */ |
2e215fec SH |
1649 | if (vd->vdev_state == VDEV_STATE_HEALTHY && |
1650 | ((asize > vd->vdev_asize && | |
1651 | (vd->vdev_expanding || spa->spa_autoexpand)) || | |
1652 | (asize < vd->vdev_asize))) | |
9babb374 | 1653 | vd->vdev_asize = asize; |
34dc7c2f | 1654 | |
9babb374 | 1655 | vdev_set_min_asize(vd); |
34dc7c2f BB |
1656 | |
1657 | /* | |
1658 | * Ensure we can issue some IO before declaring the | |
1659 | * vdev open for business. | |
1660 | */ | |
b128c09f BB |
1661 | if (vd->vdev_ops->vdev_op_leaf && |
1662 | (error = zio_wait(vdev_probe(vd, NULL))) != 0) { | |
428870ff BB |
1663 | vdev_set_state(vd, B_TRUE, VDEV_STATE_FAULTED, |
1664 | VDEV_AUX_ERR_EXCEEDED); | |
34dc7c2f BB |
1665 | return (error); |
1666 | } | |
1667 | ||
c3520e7f MA |
1668 | /* |
1669 | * Track the min and max ashift values for normal data devices. | |
1670 | */ | |
1671 | if (vd->vdev_top == vd && vd->vdev_ashift != 0 && | |
1672 | !vd->vdev_islog && vd->vdev_aux == NULL) { | |
1673 | if (vd->vdev_ashift > spa->spa_max_ashift) | |
1674 | spa->spa_max_ashift = vd->vdev_ashift; | |
1675 | if (vd->vdev_ashift < spa->spa_min_ashift) | |
1676 | spa->spa_min_ashift = vd->vdev_ashift; | |
1677 | } | |
1678 | ||
34dc7c2f | 1679 | /* |
b128c09f | 1680 | * If a leaf vdev has a DTL, and seems healthy, then kick off a |
fb5f0bc8 BB |
1681 | * resilver. But don't do this if we are doing a reopen for a scrub, |
1682 | * since this would just restart the scrub we are already doing. | |
34dc7c2f | 1683 | */ |
fb5f0bc8 BB |
1684 | if (vd->vdev_ops->vdev_op_leaf && !spa->spa_scrub_reopen && |
1685 | vdev_resilver_needed(vd, NULL, NULL)) | |
1686 | spa_async_request(spa, SPA_ASYNC_RESILVER); | |
34dc7c2f BB |
1687 | |
1688 | return (0); | |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Called once the vdevs are all opened, this routine validates the label | |
6cb8e530 | 1693 | * contents. This needs to be done before vdev_load() so that we don't |
34dc7c2f BB |
1694 | * inadvertently do repair I/Os to the wrong device. |
1695 | * | |
1696 | * This function will only return failure if one of the vdevs indicates that it | |
1697 | * has since been destroyed or exported. This is only possible if | |
1698 | * /etc/zfs/zpool.cache was readonly at the time. Otherwise, the vdev state | |
1699 | * will be updated but the function will return 0. | |
1700 | */ | |
1701 | int | |
6cb8e530 | 1702 | vdev_validate(vdev_t *vd) |
34dc7c2f BB |
1703 | { |
1704 | spa_t *spa = vd->vdev_spa; | |
34dc7c2f | 1705 | nvlist_t *label; |
6cb8e530 | 1706 | uint64_t guid = 0, aux_guid = 0, top_guid; |
34dc7c2f | 1707 | uint64_t state; |
6cb8e530 PZ |
1708 | nvlist_t *nvl; |
1709 | uint64_t txg; | |
34dc7c2f | 1710 | |
6cb8e530 PZ |
1711 | if (vdev_validate_skip) |
1712 | return (0); | |
1713 | ||
1714 | for (uint64_t c = 0; c < vd->vdev_children; c++) | |
1715 | if (vdev_validate(vd->vdev_child[c]) != 0) | |
2e528b49 | 1716 | return (SET_ERROR(EBADF)); |
34dc7c2f BB |
1717 | |
1718 | /* | |
1719 | * If the device has already failed, or was marked offline, don't do | |
1720 | * any further validation. Otherwise, label I/O will fail and we will | |
1721 | * overwrite the previous state. | |
1722 | */ | |
6cb8e530 PZ |
1723 | if (!vd->vdev_ops->vdev_op_leaf || !vdev_readable(vd)) |
1724 | return (0); | |
34dc7c2f | 1725 | |
6cb8e530 PZ |
1726 | /* |
1727 | * If we are performing an extreme rewind, we allow for a label that | |
1728 | * was modified at a point after the current txg. | |
a11c7aae PZ |
1729 | * If config lock is not held do not check for the txg. spa_sync could |
1730 | * be updating the vdev's label before updating spa_last_synced_txg. | |
6cb8e530 | 1731 | */ |
a11c7aae PZ |
1732 | if (spa->spa_extreme_rewind || spa_last_synced_txg(spa) == 0 || |
1733 | spa_config_held(spa, SCL_CONFIG, RW_WRITER) != SCL_CONFIG) | |
6cb8e530 PZ |
1734 | txg = UINT64_MAX; |
1735 | else | |
1736 | txg = spa_last_synced_txg(spa); | |
34dc7c2f | 1737 | |
6cb8e530 PZ |
1738 | if ((label = vdev_label_read_config(vd, txg)) == NULL) { |
1739 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
1740 | VDEV_AUX_BAD_LABEL); | |
38a19edd PZ |
1741 | vdev_dbgmsg(vd, "vdev_validate: failed reading config for " |
1742 | "txg %llu", (u_longlong_t)txg); | |
6cb8e530 PZ |
1743 | return (0); |
1744 | } | |
428870ff | 1745 | |
6cb8e530 PZ |
1746 | /* |
1747 | * Determine if this vdev has been split off into another | |
1748 | * pool. If so, then refuse to open it. | |
1749 | */ | |
1750 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_SPLIT_GUID, | |
1751 | &aux_guid) == 0 && aux_guid == spa_guid(spa)) { | |
1752 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1753 | VDEV_AUX_SPLIT_POOL); | |
1754 | nvlist_free(label); | |
1755 | vdev_dbgmsg(vd, "vdev_validate: vdev split into other pool"); | |
1756 | return (0); | |
1757 | } | |
34dc7c2f | 1758 | |
6cb8e530 PZ |
1759 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &guid) != 0) { |
1760 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1761 | VDEV_AUX_CORRUPT_DATA); | |
1762 | nvlist_free(label); | |
1763 | vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label", | |
1764 | ZPOOL_CONFIG_POOL_GUID); | |
1765 | return (0); | |
1766 | } | |
428870ff | 1767 | |
6cb8e530 PZ |
1768 | /* |
1769 | * If config is not trusted then ignore the spa guid check. This is | |
1770 | * necessary because if the machine crashed during a re-guid the new | |
1771 | * guid might have been written to all of the vdev labels, but not the | |
1772 | * cached config. The check will be performed again once we have the | |
1773 | * trusted config from the MOS. | |
1774 | */ | |
1775 | if (spa->spa_trust_config && guid != spa_guid(spa)) { | |
1776 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1777 | VDEV_AUX_CORRUPT_DATA); | |
1778 | nvlist_free(label); | |
1779 | vdev_dbgmsg(vd, "vdev_validate: vdev label pool_guid doesn't " | |
1780 | "match config (%llu != %llu)", (u_longlong_t)guid, | |
1781 | (u_longlong_t)spa_guid(spa)); | |
1782 | return (0); | |
1783 | } | |
1784 | ||
1785 | if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvl) | |
1786 | != 0 || nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_ORIG_GUID, | |
1787 | &aux_guid) != 0) | |
1788 | aux_guid = 0; | |
1789 | ||
1790 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0) { | |
1791 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1792 | VDEV_AUX_CORRUPT_DATA); | |
1793 | nvlist_free(label); | |
1794 | vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label", | |
1795 | ZPOOL_CONFIG_GUID); | |
1796 | return (0); | |
1797 | } | |
1798 | ||
1799 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_TOP_GUID, &top_guid) | |
1800 | != 0) { | |
1801 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1802 | VDEV_AUX_CORRUPT_DATA); | |
1803 | nvlist_free(label); | |
1804 | vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label", | |
1805 | ZPOOL_CONFIG_TOP_GUID); | |
1806 | return (0); | |
1807 | } | |
1808 | ||
1809 | /* | |
1810 | * If this vdev just became a top-level vdev because its sibling was | |
1811 | * detached, it will have adopted the parent's vdev guid -- but the | |
1812 | * label may or may not be on disk yet. Fortunately, either version | |
1813 | * of the label will have the same top guid, so if we're a top-level | |
1814 | * vdev, we can safely compare to that instead. | |
1815 | * However, if the config comes from a cachefile that failed to update | |
1816 | * after the detach, a top-level vdev will appear as a non top-level | |
1817 | * vdev in the config. Also relax the constraints if we perform an | |
1818 | * extreme rewind. | |
1819 | * | |
1820 | * If we split this vdev off instead, then we also check the | |
1821 | * original pool's guid. We don't want to consider the vdev | |
1822 | * corrupt if it is partway through a split operation. | |
1823 | */ | |
1824 | if (vd->vdev_guid != guid && vd->vdev_guid != aux_guid) { | |
1825 | boolean_t mismatch = B_FALSE; | |
1826 | if (spa->spa_trust_config && !spa->spa_extreme_rewind) { | |
1827 | if (vd != vd->vdev_top || vd->vdev_guid != top_guid) | |
1828 | mismatch = B_TRUE; | |
1829 | } else { | |
1830 | if (vd->vdev_guid != top_guid && | |
1831 | vd->vdev_top->vdev_guid != guid) | |
1832 | mismatch = B_TRUE; | |
34dc7c2f BB |
1833 | } |
1834 | ||
6cb8e530 | 1835 | if (mismatch) { |
34dc7c2f BB |
1836 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
1837 | VDEV_AUX_CORRUPT_DATA); | |
1838 | nvlist_free(label); | |
6cb8e530 PZ |
1839 | vdev_dbgmsg(vd, "vdev_validate: config guid " |
1840 | "doesn't match label guid"); | |
1841 | vdev_dbgmsg(vd, "CONFIG: guid %llu, top_guid %llu", | |
1842 | (u_longlong_t)vd->vdev_guid, | |
1843 | (u_longlong_t)vd->vdev_top->vdev_guid); | |
1844 | vdev_dbgmsg(vd, "LABEL: guid %llu, top_guid %llu, " | |
1845 | "aux_guid %llu", (u_longlong_t)guid, | |
1846 | (u_longlong_t)top_guid, (u_longlong_t)aux_guid); | |
34dc7c2f BB |
1847 | return (0); |
1848 | } | |
6cb8e530 | 1849 | } |
34dc7c2f | 1850 | |
6cb8e530 PZ |
1851 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, |
1852 | &state) != 0) { | |
1853 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
1854 | VDEV_AUX_CORRUPT_DATA); | |
34dc7c2f | 1855 | nvlist_free(label); |
6cb8e530 PZ |
1856 | vdev_dbgmsg(vd, "vdev_validate: '%s' missing from label", |
1857 | ZPOOL_CONFIG_POOL_STATE); | |
1858 | return (0); | |
1859 | } | |
34dc7c2f | 1860 | |
6cb8e530 PZ |
1861 | nvlist_free(label); |
1862 | ||
1863 | /* | |
1864 | * If this is a verbatim import, no need to check the | |
1865 | * state of the pool. | |
1866 | */ | |
1867 | if (!(spa->spa_import_flags & ZFS_IMPORT_VERBATIM) && | |
1868 | spa_load_state(spa) == SPA_LOAD_OPEN && | |
1869 | state != POOL_STATE_ACTIVE) { | |
1870 | vdev_dbgmsg(vd, "vdev_validate: invalid pool state (%llu) " | |
1871 | "for spa %s", (u_longlong_t)state, spa->spa_name); | |
1872 | return (SET_ERROR(EBADF)); | |
1873 | } | |
1874 | ||
1875 | /* | |
1876 | * If we were able to open and validate a vdev that was | |
1877 | * previously marked permanently unavailable, clear that state | |
1878 | * now. | |
1879 | */ | |
1880 | if (vd->vdev_not_present) | |
1881 | vd->vdev_not_present = 0; | |
1882 | ||
1883 | return (0); | |
1884 | } | |
1885 | ||
1886 | static void | |
1887 | vdev_copy_path_impl(vdev_t *svd, vdev_t *dvd) | |
1888 | { | |
1889 | if (svd->vdev_path != NULL && dvd->vdev_path != NULL) { | |
1890 | if (strcmp(svd->vdev_path, dvd->vdev_path) != 0) { | |
1891 | zfs_dbgmsg("vdev_copy_path: vdev %llu: path changed " | |
1892 | "from '%s' to '%s'", (u_longlong_t)dvd->vdev_guid, | |
1893 | dvd->vdev_path, svd->vdev_path); | |
1894 | spa_strfree(dvd->vdev_path); | |
1895 | dvd->vdev_path = spa_strdup(svd->vdev_path); | |
4a0ee12a | 1896 | } |
6cb8e530 PZ |
1897 | } else if (svd->vdev_path != NULL) { |
1898 | dvd->vdev_path = spa_strdup(svd->vdev_path); | |
1899 | zfs_dbgmsg("vdev_copy_path: vdev %llu: path set to '%s'", | |
1900 | (u_longlong_t)dvd->vdev_guid, dvd->vdev_path); | |
1901 | } | |
1902 | } | |
34dc7c2f | 1903 | |
6cb8e530 PZ |
1904 | /* |
1905 | * Recursively copy vdev paths from one vdev to another. Source and destination | |
1906 | * vdev trees must have same geometry otherwise return error. Intended to copy | |
1907 | * paths from userland config into MOS config. | |
1908 | */ | |
1909 | int | |
1910 | vdev_copy_path_strict(vdev_t *svd, vdev_t *dvd) | |
1911 | { | |
1912 | if ((svd->vdev_ops == &vdev_missing_ops) || | |
1913 | (svd->vdev_ishole && dvd->vdev_ishole) || | |
1914 | (dvd->vdev_ops == &vdev_indirect_ops)) | |
1915 | return (0); | |
1916 | ||
1917 | if (svd->vdev_ops != dvd->vdev_ops) { | |
1918 | vdev_dbgmsg(svd, "vdev_copy_path: vdev type mismatch: %s != %s", | |
1919 | svd->vdev_ops->vdev_op_type, dvd->vdev_ops->vdev_op_type); | |
1920 | return (SET_ERROR(EINVAL)); | |
1921 | } | |
1922 | ||
1923 | if (svd->vdev_guid != dvd->vdev_guid) { | |
1924 | vdev_dbgmsg(svd, "vdev_copy_path: guids mismatch (%llu != " | |
1925 | "%llu)", (u_longlong_t)svd->vdev_guid, | |
1926 | (u_longlong_t)dvd->vdev_guid); | |
1927 | return (SET_ERROR(EINVAL)); | |
b128c09f | 1928 | } |
34dc7c2f | 1929 | |
6cb8e530 PZ |
1930 | if (svd->vdev_children != dvd->vdev_children) { |
1931 | vdev_dbgmsg(svd, "vdev_copy_path: children count mismatch: " | |
1932 | "%llu != %llu", (u_longlong_t)svd->vdev_children, | |
1933 | (u_longlong_t)dvd->vdev_children); | |
1934 | return (SET_ERROR(EINVAL)); | |
1935 | } | |
1936 | ||
1937 | for (uint64_t i = 0; i < svd->vdev_children; i++) { | |
1938 | int error = vdev_copy_path_strict(svd->vdev_child[i], | |
1939 | dvd->vdev_child[i]); | |
1940 | if (error != 0) | |
1941 | return (error); | |
1942 | } | |
1943 | ||
1944 | if (svd->vdev_ops->vdev_op_leaf) | |
1945 | vdev_copy_path_impl(svd, dvd); | |
1946 | ||
34dc7c2f BB |
1947 | return (0); |
1948 | } | |
1949 | ||
6cb8e530 PZ |
1950 | static void |
1951 | vdev_copy_path_search(vdev_t *stvd, vdev_t *dvd) | |
1952 | { | |
1953 | ASSERT(stvd->vdev_top == stvd); | |
1954 | ASSERT3U(stvd->vdev_id, ==, dvd->vdev_top->vdev_id); | |
1955 | ||
1956 | for (uint64_t i = 0; i < dvd->vdev_children; i++) { | |
1957 | vdev_copy_path_search(stvd, dvd->vdev_child[i]); | |
1958 | } | |
1959 | ||
1960 | if (!dvd->vdev_ops->vdev_op_leaf || !vdev_is_concrete(dvd)) | |
1961 | return; | |
1962 | ||
1963 | /* | |
1964 | * The idea here is that while a vdev can shift positions within | |
1965 | * a top vdev (when replacing, attaching mirror, etc.) it cannot | |
1966 | * step outside of it. | |
1967 | */ | |
1968 | vdev_t *vd = vdev_lookup_by_guid(stvd, dvd->vdev_guid); | |
1969 | ||
1970 | if (vd == NULL || vd->vdev_ops != dvd->vdev_ops) | |
1971 | return; | |
1972 | ||
1973 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
1974 | ||
1975 | vdev_copy_path_impl(vd, dvd); | |
1976 | } | |
1977 | ||
1978 | /* | |
1979 | * Recursively copy vdev paths from one root vdev to another. Source and | |
1980 | * destination vdev trees may differ in geometry. For each destination leaf | |
1981 | * vdev, search a vdev with the same guid and top vdev id in the source. | |
1982 | * Intended to copy paths from userland config into MOS config. | |
1983 | */ | |
1984 | void | |
1985 | vdev_copy_path_relaxed(vdev_t *srvd, vdev_t *drvd) | |
1986 | { | |
1987 | uint64_t children = MIN(srvd->vdev_children, drvd->vdev_children); | |
1988 | ASSERT(srvd->vdev_ops == &vdev_root_ops); | |
1989 | ASSERT(drvd->vdev_ops == &vdev_root_ops); | |
1990 | ||
1991 | for (uint64_t i = 0; i < children; i++) { | |
1992 | vdev_copy_path_search(srvd->vdev_child[i], | |
1993 | drvd->vdev_child[i]); | |
1994 | } | |
1995 | } | |
1996 | ||
34dc7c2f BB |
1997 | /* |
1998 | * Close a virtual device. | |
1999 | */ | |
2000 | void | |
2001 | vdev_close(vdev_t *vd) | |
2002 | { | |
428870ff | 2003 | vdev_t *pvd = vd->vdev_parent; |
1fde1e37 | 2004 | ASSERTV(spa_t *spa = vd->vdev_spa); |
fb5f0bc8 BB |
2005 | |
2006 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
2007 | ||
428870ff BB |
2008 | /* |
2009 | * If our parent is reopening, then we are as well, unless we are | |
2010 | * going offline. | |
2011 | */ | |
2012 | if (pvd != NULL && pvd->vdev_reopening) | |
2013 | vd->vdev_reopening = (pvd->vdev_reopening && !vd->vdev_offline); | |
2014 | ||
34dc7c2f BB |
2015 | vd->vdev_ops->vdev_op_close(vd); |
2016 | ||
2017 | vdev_cache_purge(vd); | |
2018 | ||
2019 | /* | |
9babb374 | 2020 | * We record the previous state before we close it, so that if we are |
34dc7c2f BB |
2021 | * doing a reopen(), we don't generate FMA ereports if we notice that |
2022 | * it's still faulted. | |
2023 | */ | |
2024 | vd->vdev_prevstate = vd->vdev_state; | |
2025 | ||
2026 | if (vd->vdev_offline) | |
2027 | vd->vdev_state = VDEV_STATE_OFFLINE; | |
2028 | else | |
2029 | vd->vdev_state = VDEV_STATE_CLOSED; | |
2030 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
2031 | } | |
2032 | ||
428870ff BB |
2033 | void |
2034 | vdev_hold(vdev_t *vd) | |
2035 | { | |
2036 | spa_t *spa = vd->vdev_spa; | |
2037 | ||
2038 | ASSERT(spa_is_root(spa)); | |
2039 | if (spa->spa_state == POOL_STATE_UNINITIALIZED) | |
2040 | return; | |
2041 | ||
1c27024e | 2042 | for (int c = 0; c < vd->vdev_children; c++) |
428870ff BB |
2043 | vdev_hold(vd->vdev_child[c]); |
2044 | ||
2045 | if (vd->vdev_ops->vdev_op_leaf) | |
2046 | vd->vdev_ops->vdev_op_hold(vd); | |
2047 | } | |
2048 | ||
2049 | void | |
2050 | vdev_rele(vdev_t *vd) | |
2051 | { | |
d6320ddb | 2052 | ASSERT(spa_is_root(vd->vdev_spa)); |
1c27024e | 2053 | for (int c = 0; c < vd->vdev_children; c++) |
428870ff BB |
2054 | vdev_rele(vd->vdev_child[c]); |
2055 | ||
2056 | if (vd->vdev_ops->vdev_op_leaf) | |
2057 | vd->vdev_ops->vdev_op_rele(vd); | |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | * Reopen all interior vdevs and any unopened leaves. We don't actually | |
2062 | * reopen leaf vdevs which had previously been opened as they might deadlock | |
2063 | * on the spa_config_lock. Instead we only obtain the leaf's physical size. | |
2064 | * If the leaf has never been opened then open it, as usual. | |
2065 | */ | |
34dc7c2f BB |
2066 | void |
2067 | vdev_reopen(vdev_t *vd) | |
2068 | { | |
2069 | spa_t *spa = vd->vdev_spa; | |
2070 | ||
b128c09f | 2071 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
34dc7c2f | 2072 | |
428870ff BB |
2073 | /* set the reopening flag unless we're taking the vdev offline */ |
2074 | vd->vdev_reopening = !vd->vdev_offline; | |
34dc7c2f BB |
2075 | vdev_close(vd); |
2076 | (void) vdev_open(vd); | |
2077 | ||
2078 | /* | |
2079 | * Call vdev_validate() here to make sure we have the same device. | |
2080 | * Otherwise, a device with an invalid label could be successfully | |
2081 | * opened in response to vdev_reopen(). | |
2082 | */ | |
b128c09f BB |
2083 | if (vd->vdev_aux) { |
2084 | (void) vdev_validate_aux(vd); | |
2085 | if (vdev_readable(vd) && vdev_writeable(vd) && | |
9babb374 BB |
2086 | vd->vdev_aux == &spa->spa_l2cache && |
2087 | !l2arc_vdev_present(vd)) | |
2088 | l2arc_add_vdev(spa, vd); | |
b128c09f | 2089 | } else { |
6cb8e530 | 2090 | (void) vdev_validate(vd); |
b128c09f | 2091 | } |
34dc7c2f BB |
2092 | |
2093 | /* | |
2094 | * Reassess parent vdev's health. | |
2095 | */ | |
2096 | vdev_propagate_state(vd); | |
2097 | } | |
2098 | ||
2099 | int | |
2100 | vdev_create(vdev_t *vd, uint64_t txg, boolean_t isreplacing) | |
2101 | { | |
2102 | int error; | |
2103 | ||
2104 | /* | |
2105 | * Normally, partial opens (e.g. of a mirror) are allowed. | |
2106 | * For a create, however, we want to fail the request if | |
2107 | * there are any components we can't open. | |
2108 | */ | |
2109 | error = vdev_open(vd); | |
2110 | ||
2111 | if (error || vd->vdev_state != VDEV_STATE_HEALTHY) { | |
2112 | vdev_close(vd); | |
2113 | return (error ? error : ENXIO); | |
2114 | } | |
2115 | ||
2116 | /* | |
93cf2076 | 2117 | * Recursively load DTLs and initialize all labels. |
34dc7c2f | 2118 | */ |
93cf2076 GW |
2119 | if ((error = vdev_dtl_load(vd)) != 0 || |
2120 | (error = vdev_label_init(vd, txg, isreplacing ? | |
34dc7c2f BB |
2121 | VDEV_LABEL_REPLACE : VDEV_LABEL_CREATE)) != 0) { |
2122 | vdev_close(vd); | |
2123 | return (error); | |
2124 | } | |
2125 | ||
2126 | return (0); | |
2127 | } | |
2128 | ||
34dc7c2f | 2129 | void |
9babb374 | 2130 | vdev_metaslab_set_size(vdev_t *vd) |
34dc7c2f | 2131 | { |
d2734cce SD |
2132 | uint64_t asize = vd->vdev_asize; |
2133 | uint64_t ms_shift = 0; | |
2134 | ||
34dc7c2f | 2135 | /* |
d2734cce SD |
2136 | * For vdevs that are bigger than 8G the metaslab size varies in |
2137 | * a way that the number of metaslabs increases in powers of two, | |
2138 | * linearly in terms of vdev_asize, starting from 16 metaslabs. | |
2139 | * So for vdev_asize of 8G we get 16 metaslabs, for 16G, we get 32, | |
2140 | * and so on, until we hit the maximum metaslab count limit | |
2141 | * [vdev_max_ms_count] from which point the metaslab count stays | |
2142 | * the same. | |
34dc7c2f | 2143 | */ |
d2734cce SD |
2144 | ms_shift = vdev_default_ms_shift; |
2145 | ||
2146 | if ((asize >> ms_shift) < vdev_min_ms_count) { | |
2147 | /* | |
2148 | * For devices that are less than 8G we want to have | |
2149 | * exactly 16 metaslabs. We don't want less as integer | |
2150 | * division rounds down, so less metaslabs mean more | |
2151 | * wasted space. We don't want more as these vdevs are | |
2152 | * small and in the likely event that we are running | |
2153 | * out of space, the SPA will have a hard time finding | |
2154 | * space due to fragmentation. | |
2155 | */ | |
2156 | ms_shift = highbit64(asize / vdev_min_ms_count); | |
2157 | ms_shift = MAX(ms_shift, SPA_MAXBLOCKSHIFT); | |
2158 | ||
2159 | } else if ((asize >> ms_shift) > vdev_max_ms_count) { | |
2160 | ms_shift = highbit64(asize / vdev_max_ms_count); | |
2161 | } | |
2162 | ||
2163 | vd->vdev_ms_shift = ms_shift; | |
2164 | ASSERT3U(vd->vdev_ms_shift, >=, SPA_MAXBLOCKSHIFT); | |
34dc7c2f BB |
2165 | } |
2166 | ||
2167 | void | |
2168 | vdev_dirty(vdev_t *vd, int flags, void *arg, uint64_t txg) | |
2169 | { | |
2170 | ASSERT(vd == vd->vdev_top); | |
a1d477c2 MA |
2171 | /* indirect vdevs don't have metaslabs or dtls */ |
2172 | ASSERT(vdev_is_concrete(vd) || flags == 0); | |
34dc7c2f | 2173 | ASSERT(ISP2(flags)); |
572e2857 | 2174 | ASSERT(spa_writeable(vd->vdev_spa)); |
34dc7c2f BB |
2175 | |
2176 | if (flags & VDD_METASLAB) | |
2177 | (void) txg_list_add(&vd->vdev_ms_list, arg, txg); | |
2178 | ||
2179 | if (flags & VDD_DTL) | |
2180 | (void) txg_list_add(&vd->vdev_dtl_list, arg, txg); | |
2181 | ||
2182 | (void) txg_list_add(&vd->vdev_spa->spa_vdev_txg_list, vd, txg); | |
2183 | } | |
2184 | ||
93cf2076 GW |
2185 | void |
2186 | vdev_dirty_leaves(vdev_t *vd, int flags, uint64_t txg) | |
2187 | { | |
1c27024e | 2188 | for (int c = 0; c < vd->vdev_children; c++) |
93cf2076 GW |
2189 | vdev_dirty_leaves(vd->vdev_child[c], flags, txg); |
2190 | ||
2191 | if (vd->vdev_ops->vdev_op_leaf) | |
2192 | vdev_dirty(vd->vdev_top, flags, vd, txg); | |
2193 | } | |
2194 | ||
fb5f0bc8 BB |
2195 | /* |
2196 | * DTLs. | |
2197 | * | |
2198 | * A vdev's DTL (dirty time log) is the set of transaction groups for which | |
428870ff | 2199 | * the vdev has less than perfect replication. There are four kinds of DTL: |
fb5f0bc8 BB |
2200 | * |
2201 | * DTL_MISSING: txgs for which the vdev has no valid copies of the data | |
2202 | * | |
2203 | * DTL_PARTIAL: txgs for which data is available, but not fully replicated | |
2204 | * | |
2205 | * DTL_SCRUB: the txgs that could not be repaired by the last scrub; upon | |
2206 | * scrub completion, DTL_SCRUB replaces DTL_MISSING in the range of | |
2207 | * txgs that was scrubbed. | |
2208 | * | |
2209 | * DTL_OUTAGE: txgs which cannot currently be read, whether due to | |
2210 | * persistent errors or just some device being offline. | |
2211 | * Unlike the other three, the DTL_OUTAGE map is not generally | |
2212 | * maintained; it's only computed when needed, typically to | |
2213 | * determine whether a device can be detached. | |
2214 | * | |
2215 | * For leaf vdevs, DTL_MISSING and DTL_PARTIAL are identical: the device | |
2216 | * either has the data or it doesn't. | |
2217 | * | |
2218 | * For interior vdevs such as mirror and RAID-Z the picture is more complex. | |
2219 | * A vdev's DTL_PARTIAL is the union of its children's DTL_PARTIALs, because | |
2220 | * if any child is less than fully replicated, then so is its parent. | |
2221 | * A vdev's DTL_MISSING is a modified union of its children's DTL_MISSINGs, | |
2222 | * comprising only those txgs which appear in 'maxfaults' or more children; | |
2223 | * those are the txgs we don't have enough replication to read. For example, | |
2224 | * double-parity RAID-Z can tolerate up to two missing devices (maxfaults == 2); | |
2225 | * thus, its DTL_MISSING consists of the set of txgs that appear in more than | |
2226 | * two child DTL_MISSING maps. | |
2227 | * | |
2228 | * It should be clear from the above that to compute the DTLs and outage maps | |
2229 | * for all vdevs, it suffices to know just the leaf vdevs' DTL_MISSING maps. | |
2230 | * Therefore, that is all we keep on disk. When loading the pool, or after | |
2231 | * a configuration change, we generate all other DTLs from first principles. | |
2232 | */ | |
34dc7c2f | 2233 | void |
fb5f0bc8 | 2234 | vdev_dtl_dirty(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) |
34dc7c2f | 2235 | { |
93cf2076 | 2236 | range_tree_t *rt = vd->vdev_dtl[t]; |
fb5f0bc8 BB |
2237 | |
2238 | ASSERT(t < DTL_TYPES); | |
2239 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
572e2857 | 2240 | ASSERT(spa_writeable(vd->vdev_spa)); |
fb5f0bc8 | 2241 | |
a1d477c2 | 2242 | mutex_enter(&vd->vdev_dtl_lock); |
93cf2076 GW |
2243 | if (!range_tree_contains(rt, txg, size)) |
2244 | range_tree_add(rt, txg, size); | |
a1d477c2 | 2245 | mutex_exit(&vd->vdev_dtl_lock); |
34dc7c2f BB |
2246 | } |
2247 | ||
fb5f0bc8 BB |
2248 | boolean_t |
2249 | vdev_dtl_contains(vdev_t *vd, vdev_dtl_type_t t, uint64_t txg, uint64_t size) | |
34dc7c2f | 2250 | { |
93cf2076 | 2251 | range_tree_t *rt = vd->vdev_dtl[t]; |
fb5f0bc8 | 2252 | boolean_t dirty = B_FALSE; |
34dc7c2f | 2253 | |
fb5f0bc8 BB |
2254 | ASSERT(t < DTL_TYPES); |
2255 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
34dc7c2f | 2256 | |
a1d477c2 MA |
2257 | /* |
2258 | * While we are loading the pool, the DTLs have not been loaded yet. | |
2259 | * Ignore the DTLs and try all devices. This avoids a recursive | |
2260 | * mutex enter on the vdev_dtl_lock, and also makes us try hard | |
2261 | * when loading the pool (relying on the checksum to ensure that | |
2262 | * we get the right data -- note that we while loading, we are | |
2263 | * only reading the MOS, which is always checksummed). | |
2264 | */ | |
2265 | if (vd->vdev_spa->spa_load_state != SPA_LOAD_NONE) | |
2266 | return (B_FALSE); | |
2267 | ||
2268 | mutex_enter(&vd->vdev_dtl_lock); | |
d2734cce | 2269 | if (!range_tree_is_empty(rt)) |
93cf2076 | 2270 | dirty = range_tree_contains(rt, txg, size); |
a1d477c2 | 2271 | mutex_exit(&vd->vdev_dtl_lock); |
34dc7c2f BB |
2272 | |
2273 | return (dirty); | |
2274 | } | |
2275 | ||
fb5f0bc8 BB |
2276 | boolean_t |
2277 | vdev_dtl_empty(vdev_t *vd, vdev_dtl_type_t t) | |
2278 | { | |
93cf2076 | 2279 | range_tree_t *rt = vd->vdev_dtl[t]; |
fb5f0bc8 BB |
2280 | boolean_t empty; |
2281 | ||
a1d477c2 | 2282 | mutex_enter(&vd->vdev_dtl_lock); |
d2734cce | 2283 | empty = range_tree_is_empty(rt); |
a1d477c2 | 2284 | mutex_exit(&vd->vdev_dtl_lock); |
fb5f0bc8 BB |
2285 | |
2286 | return (empty); | |
2287 | } | |
2288 | ||
3d6da72d IH |
2289 | /* |
2290 | * Returns B_TRUE if vdev determines offset needs to be resilvered. | |
2291 | */ | |
2292 | boolean_t | |
2293 | vdev_dtl_need_resilver(vdev_t *vd, uint64_t offset, size_t psize) | |
2294 | { | |
2295 | ASSERT(vd != vd->vdev_spa->spa_root_vdev); | |
2296 | ||
2297 | if (vd->vdev_ops->vdev_op_need_resilver == NULL || | |
2298 | vd->vdev_ops->vdev_op_leaf) | |
2299 | return (B_TRUE); | |
2300 | ||
2301 | return (vd->vdev_ops->vdev_op_need_resilver(vd, offset, psize)); | |
2302 | } | |
2303 | ||
5d1f7fb6 GW |
2304 | /* |
2305 | * Returns the lowest txg in the DTL range. | |
2306 | */ | |
2307 | static uint64_t | |
2308 | vdev_dtl_min(vdev_t *vd) | |
2309 | { | |
93cf2076 | 2310 | range_seg_t *rs; |
5d1f7fb6 GW |
2311 | |
2312 | ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); | |
93cf2076 | 2313 | ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0); |
5d1f7fb6 GW |
2314 | ASSERT0(vd->vdev_children); |
2315 | ||
93cf2076 GW |
2316 | rs = avl_first(&vd->vdev_dtl[DTL_MISSING]->rt_root); |
2317 | return (rs->rs_start - 1); | |
5d1f7fb6 GW |
2318 | } |
2319 | ||
2320 | /* | |
2321 | * Returns the highest txg in the DTL. | |
2322 | */ | |
2323 | static uint64_t | |
2324 | vdev_dtl_max(vdev_t *vd) | |
2325 | { | |
93cf2076 | 2326 | range_seg_t *rs; |
5d1f7fb6 GW |
2327 | |
2328 | ASSERT(MUTEX_HELD(&vd->vdev_dtl_lock)); | |
93cf2076 | 2329 | ASSERT3U(range_tree_space(vd->vdev_dtl[DTL_MISSING]), !=, 0); |
5d1f7fb6 GW |
2330 | ASSERT0(vd->vdev_children); |
2331 | ||
93cf2076 GW |
2332 | rs = avl_last(&vd->vdev_dtl[DTL_MISSING]->rt_root); |
2333 | return (rs->rs_end); | |
5d1f7fb6 GW |
2334 | } |
2335 | ||
2336 | /* | |
2337 | * Determine if a resilvering vdev should remove any DTL entries from | |
2338 | * its range. If the vdev was resilvering for the entire duration of the | |
2339 | * scan then it should excise that range from its DTLs. Otherwise, this | |
2340 | * vdev is considered partially resilvered and should leave its DTL | |
2341 | * entries intact. The comment in vdev_dtl_reassess() describes how we | |
2342 | * excise the DTLs. | |
2343 | */ | |
2344 | static boolean_t | |
2345 | vdev_dtl_should_excise(vdev_t *vd) | |
2346 | { | |
2347 | spa_t *spa = vd->vdev_spa; | |
2348 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; | |
2349 | ||
2350 | ASSERT0(scn->scn_phys.scn_errors); | |
2351 | ASSERT0(vd->vdev_children); | |
2352 | ||
335b251a MA |
2353 | if (vd->vdev_state < VDEV_STATE_DEGRADED) |
2354 | return (B_FALSE); | |
2355 | ||
5d1f7fb6 | 2356 | if (vd->vdev_resilver_txg == 0 || |
d2734cce | 2357 | range_tree_is_empty(vd->vdev_dtl[DTL_MISSING])) |
5d1f7fb6 GW |
2358 | return (B_TRUE); |
2359 | ||
2360 | /* | |
2361 | * When a resilver is initiated the scan will assign the scn_max_txg | |
2362 | * value to the highest txg value that exists in all DTLs. If this | |
2363 | * device's max DTL is not part of this scan (i.e. it is not in | |
2364 | * the range (scn_min_txg, scn_max_txg] then it is not eligible | |
2365 | * for excision. | |
2366 | */ | |
2367 | if (vdev_dtl_max(vd) <= scn->scn_phys.scn_max_txg) { | |
2368 | ASSERT3U(scn->scn_phys.scn_min_txg, <=, vdev_dtl_min(vd)); | |
2369 | ASSERT3U(scn->scn_phys.scn_min_txg, <, vd->vdev_resilver_txg); | |
2370 | ASSERT3U(vd->vdev_resilver_txg, <=, scn->scn_phys.scn_max_txg); | |
2371 | return (B_TRUE); | |
2372 | } | |
2373 | return (B_FALSE); | |
2374 | } | |
2375 | ||
34dc7c2f BB |
2376 | /* |
2377 | * Reassess DTLs after a config change or scrub completion. | |
2378 | */ | |
2379 | void | |
2380 | vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done) | |
2381 | { | |
2382 | spa_t *spa = vd->vdev_spa; | |
fb5f0bc8 | 2383 | avl_tree_t reftree; |
1c27024e | 2384 | int minref; |
34dc7c2f | 2385 | |
fb5f0bc8 | 2386 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 2387 | |
1c27024e | 2388 | for (int c = 0; c < vd->vdev_children; c++) |
fb5f0bc8 BB |
2389 | vdev_dtl_reassess(vd->vdev_child[c], txg, |
2390 | scrub_txg, scrub_done); | |
2391 | ||
a1d477c2 | 2392 | if (vd == spa->spa_root_vdev || !vdev_is_concrete(vd) || vd->vdev_aux) |
fb5f0bc8 BB |
2393 | return; |
2394 | ||
2395 | if (vd->vdev_ops->vdev_op_leaf) { | |
428870ff BB |
2396 | dsl_scan_t *scn = spa->spa_dsl_pool->dp_scan; |
2397 | ||
34dc7c2f | 2398 | mutex_enter(&vd->vdev_dtl_lock); |
5d1f7fb6 | 2399 | |
02638a30 TC |
2400 | /* |
2401 | * If requested, pretend the scan completed cleanly. | |
2402 | */ | |
2403 | if (zfs_scan_ignore_errors && scn) | |
2404 | scn->scn_phys.scn_errors = 0; | |
2405 | ||
5d1f7fb6 GW |
2406 | /* |
2407 | * If we've completed a scan cleanly then determine | |
2408 | * if this vdev should remove any DTLs. We only want to | |
2409 | * excise regions on vdevs that were available during | |
2410 | * the entire duration of this scan. | |
2411 | */ | |
b128c09f | 2412 | if (scrub_txg != 0 && |
428870ff | 2413 | (spa->spa_scrub_started || |
5d1f7fb6 GW |
2414 | (scn != NULL && scn->scn_phys.scn_errors == 0)) && |
2415 | vdev_dtl_should_excise(vd)) { | |
b128c09f BB |
2416 | /* |
2417 | * We completed a scrub up to scrub_txg. If we | |
2418 | * did it without rebooting, then the scrub dtl | |
2419 | * will be valid, so excise the old region and | |
2420 | * fold in the scrub dtl. Otherwise, leave the | |
2421 | * dtl as-is if there was an error. | |
fb5f0bc8 BB |
2422 | * |
2423 | * There's little trick here: to excise the beginning | |
2424 | * of the DTL_MISSING map, we put it into a reference | |
2425 | * tree and then add a segment with refcnt -1 that | |
2426 | * covers the range [0, scrub_txg). This means | |
2427 | * that each txg in that range has refcnt -1 or 0. | |
2428 | * We then add DTL_SCRUB with a refcnt of 2, so that | |
2429 | * entries in the range [0, scrub_txg) will have a | |
2430 | * positive refcnt -- either 1 or 2. We then convert | |
2431 | * the reference tree into the new DTL_MISSING map. | |
b128c09f | 2432 | */ |
93cf2076 GW |
2433 | space_reftree_create(&reftree); |
2434 | space_reftree_add_map(&reftree, | |
2435 | vd->vdev_dtl[DTL_MISSING], 1); | |
2436 | space_reftree_add_seg(&reftree, 0, scrub_txg, -1); | |
2437 | space_reftree_add_map(&reftree, | |
2438 | vd->vdev_dtl[DTL_SCRUB], 2); | |
2439 | space_reftree_generate_map(&reftree, | |
2440 | vd->vdev_dtl[DTL_MISSING], 1); | |
2441 | space_reftree_destroy(&reftree); | |
34dc7c2f | 2442 | } |
93cf2076 GW |
2443 | range_tree_vacate(vd->vdev_dtl[DTL_PARTIAL], NULL, NULL); |
2444 | range_tree_walk(vd->vdev_dtl[DTL_MISSING], | |
2445 | range_tree_add, vd->vdev_dtl[DTL_PARTIAL]); | |
34dc7c2f | 2446 | if (scrub_done) |
93cf2076 GW |
2447 | range_tree_vacate(vd->vdev_dtl[DTL_SCRUB], NULL, NULL); |
2448 | range_tree_vacate(vd->vdev_dtl[DTL_OUTAGE], NULL, NULL); | |
fb5f0bc8 | 2449 | if (!vdev_readable(vd)) |
93cf2076 | 2450 | range_tree_add(vd->vdev_dtl[DTL_OUTAGE], 0, -1ULL); |
fb5f0bc8 | 2451 | else |
93cf2076 GW |
2452 | range_tree_walk(vd->vdev_dtl[DTL_MISSING], |
2453 | range_tree_add, vd->vdev_dtl[DTL_OUTAGE]); | |
5d1f7fb6 GW |
2454 | |
2455 | /* | |
2456 | * If the vdev was resilvering and no longer has any | |
d14fa5db | 2457 | * DTLs then reset its resilvering flag and dirty |
2458 | * the top level so that we persist the change. | |
5d1f7fb6 GW |
2459 | */ |
2460 | if (vd->vdev_resilver_txg != 0 && | |
d2734cce SD |
2461 | range_tree_is_empty(vd->vdev_dtl[DTL_MISSING]) && |
2462 | range_tree_is_empty(vd->vdev_dtl[DTL_OUTAGE])) { | |
5d1f7fb6 | 2463 | vd->vdev_resilver_txg = 0; |
d14fa5db | 2464 | vdev_config_dirty(vd->vdev_top); |
2465 | } | |
5d1f7fb6 | 2466 | |
34dc7c2f | 2467 | mutex_exit(&vd->vdev_dtl_lock); |
b128c09f | 2468 | |
34dc7c2f BB |
2469 | if (txg != 0) |
2470 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, txg); | |
2471 | return; | |
2472 | } | |
2473 | ||
34dc7c2f | 2474 | mutex_enter(&vd->vdev_dtl_lock); |
1c27024e | 2475 | for (int t = 0; t < DTL_TYPES; t++) { |
428870ff BB |
2476 | /* account for child's outage in parent's missing map */ |
2477 | int s = (t == DTL_MISSING) ? DTL_OUTAGE: t; | |
fb5f0bc8 BB |
2478 | if (t == DTL_SCRUB) |
2479 | continue; /* leaf vdevs only */ | |
2480 | if (t == DTL_PARTIAL) | |
2481 | minref = 1; /* i.e. non-zero */ | |
2482 | else if (vd->vdev_nparity != 0) | |
2483 | minref = vd->vdev_nparity + 1; /* RAID-Z */ | |
2484 | else | |
2485 | minref = vd->vdev_children; /* any kind of mirror */ | |
93cf2076 | 2486 | space_reftree_create(&reftree); |
1c27024e | 2487 | for (int c = 0; c < vd->vdev_children; c++) { |
fb5f0bc8 BB |
2488 | vdev_t *cvd = vd->vdev_child[c]; |
2489 | mutex_enter(&cvd->vdev_dtl_lock); | |
93cf2076 | 2490 | space_reftree_add_map(&reftree, cvd->vdev_dtl[s], 1); |
fb5f0bc8 BB |
2491 | mutex_exit(&cvd->vdev_dtl_lock); |
2492 | } | |
93cf2076 GW |
2493 | space_reftree_generate_map(&reftree, vd->vdev_dtl[t], minref); |
2494 | space_reftree_destroy(&reftree); | |
34dc7c2f | 2495 | } |
fb5f0bc8 | 2496 | mutex_exit(&vd->vdev_dtl_lock); |
34dc7c2f BB |
2497 | } |
2498 | ||
93cf2076 | 2499 | int |
34dc7c2f BB |
2500 | vdev_dtl_load(vdev_t *vd) |
2501 | { | |
2502 | spa_t *spa = vd->vdev_spa; | |
34dc7c2f | 2503 | objset_t *mos = spa->spa_meta_objset; |
93cf2076 | 2504 | int error = 0; |
34dc7c2f | 2505 | |
93cf2076 | 2506 | if (vd->vdev_ops->vdev_op_leaf && vd->vdev_dtl_object != 0) { |
a1d477c2 | 2507 | ASSERT(vdev_is_concrete(vd)); |
34dc7c2f | 2508 | |
93cf2076 | 2509 | error = space_map_open(&vd->vdev_dtl_sm, mos, |
a1d477c2 | 2510 | vd->vdev_dtl_object, 0, -1ULL, 0); |
93cf2076 GW |
2511 | if (error) |
2512 | return (error); | |
2513 | ASSERT(vd->vdev_dtl_sm != NULL); | |
34dc7c2f | 2514 | |
93cf2076 | 2515 | mutex_enter(&vd->vdev_dtl_lock); |
428870ff | 2516 | |
93cf2076 GW |
2517 | /* |
2518 | * Now that we've opened the space_map we need to update | |
2519 | * the in-core DTL. | |
2520 | */ | |
2521 | space_map_update(vd->vdev_dtl_sm); | |
34dc7c2f | 2522 | |
93cf2076 GW |
2523 | error = space_map_load(vd->vdev_dtl_sm, |
2524 | vd->vdev_dtl[DTL_MISSING], SM_ALLOC); | |
2525 | mutex_exit(&vd->vdev_dtl_lock); | |
34dc7c2f | 2526 | |
93cf2076 GW |
2527 | return (error); |
2528 | } | |
2529 | ||
1c27024e | 2530 | for (int c = 0; c < vd->vdev_children; c++) { |
93cf2076 GW |
2531 | error = vdev_dtl_load(vd->vdev_child[c]); |
2532 | if (error != 0) | |
2533 | break; | |
2534 | } | |
34dc7c2f BB |
2535 | |
2536 | return (error); | |
2537 | } | |
2538 | ||
e0ab3ab5 JS |
2539 | void |
2540 | vdev_destroy_unlink_zap(vdev_t *vd, uint64_t zapobj, dmu_tx_t *tx) | |
2541 | { | |
2542 | spa_t *spa = vd->vdev_spa; | |
2543 | ||
2544 | VERIFY0(zap_destroy(spa->spa_meta_objset, zapobj, tx)); | |
2545 | VERIFY0(zap_remove_int(spa->spa_meta_objset, spa->spa_all_vdev_zaps, | |
2546 | zapobj, tx)); | |
2547 | } | |
2548 | ||
2549 | uint64_t | |
2550 | vdev_create_link_zap(vdev_t *vd, dmu_tx_t *tx) | |
2551 | { | |
2552 | spa_t *spa = vd->vdev_spa; | |
2553 | uint64_t zap = zap_create(spa->spa_meta_objset, DMU_OTN_ZAP_METADATA, | |
2554 | DMU_OT_NONE, 0, tx); | |
2555 | ||
2556 | ASSERT(zap != 0); | |
2557 | VERIFY0(zap_add_int(spa->spa_meta_objset, spa->spa_all_vdev_zaps, | |
2558 | zap, tx)); | |
2559 | ||
2560 | return (zap); | |
2561 | } | |
2562 | ||
2563 | void | |
2564 | vdev_construct_zaps(vdev_t *vd, dmu_tx_t *tx) | |
2565 | { | |
e0ab3ab5 JS |
2566 | if (vd->vdev_ops != &vdev_hole_ops && |
2567 | vd->vdev_ops != &vdev_missing_ops && | |
2568 | vd->vdev_ops != &vdev_root_ops && | |
2569 | !vd->vdev_top->vdev_removing) { | |
2570 | if (vd->vdev_ops->vdev_op_leaf && vd->vdev_leaf_zap == 0) { | |
2571 | vd->vdev_leaf_zap = vdev_create_link_zap(vd, tx); | |
2572 | } | |
2573 | if (vd == vd->vdev_top && vd->vdev_top_zap == 0) { | |
2574 | vd->vdev_top_zap = vdev_create_link_zap(vd, tx); | |
2575 | } | |
2576 | } | |
1c27024e | 2577 | for (uint64_t i = 0; i < vd->vdev_children; i++) { |
e0ab3ab5 JS |
2578 | vdev_construct_zaps(vd->vdev_child[i], tx); |
2579 | } | |
2580 | } | |
2581 | ||
34dc7c2f BB |
2582 | void |
2583 | vdev_dtl_sync(vdev_t *vd, uint64_t txg) | |
2584 | { | |
2585 | spa_t *spa = vd->vdev_spa; | |
93cf2076 | 2586 | range_tree_t *rt = vd->vdev_dtl[DTL_MISSING]; |
34dc7c2f | 2587 | objset_t *mos = spa->spa_meta_objset; |
93cf2076 | 2588 | range_tree_t *rtsync; |
34dc7c2f | 2589 | dmu_tx_t *tx; |
93cf2076 | 2590 | uint64_t object = space_map_object(vd->vdev_dtl_sm); |
34dc7c2f | 2591 | |
a1d477c2 | 2592 | ASSERT(vdev_is_concrete(vd)); |
93cf2076 | 2593 | ASSERT(vd->vdev_ops->vdev_op_leaf); |
428870ff | 2594 | |
34dc7c2f BB |
2595 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); |
2596 | ||
93cf2076 GW |
2597 | if (vd->vdev_detached || vd->vdev_top->vdev_removing) { |
2598 | mutex_enter(&vd->vdev_dtl_lock); | |
2599 | space_map_free(vd->vdev_dtl_sm, tx); | |
2600 | space_map_close(vd->vdev_dtl_sm); | |
2601 | vd->vdev_dtl_sm = NULL; | |
2602 | mutex_exit(&vd->vdev_dtl_lock); | |
e0ab3ab5 JS |
2603 | |
2604 | /* | |
2605 | * We only destroy the leaf ZAP for detached leaves or for | |
2606 | * removed log devices. Removed data devices handle leaf ZAP | |
2607 | * cleanup later, once cancellation is no longer possible. | |
2608 | */ | |
2609 | if (vd->vdev_leaf_zap != 0 && (vd->vdev_detached || | |
2610 | vd->vdev_top->vdev_islog)) { | |
2611 | vdev_destroy_unlink_zap(vd, vd->vdev_leaf_zap, tx); | |
2612 | vd->vdev_leaf_zap = 0; | |
2613 | } | |
2614 | ||
34dc7c2f | 2615 | dmu_tx_commit(tx); |
34dc7c2f BB |
2616 | return; |
2617 | } | |
2618 | ||
93cf2076 GW |
2619 | if (vd->vdev_dtl_sm == NULL) { |
2620 | uint64_t new_object; | |
2621 | ||
d2734cce | 2622 | new_object = space_map_alloc(mos, vdev_dtl_sm_blksz, tx); |
93cf2076 GW |
2623 | VERIFY3U(new_object, !=, 0); |
2624 | ||
2625 | VERIFY0(space_map_open(&vd->vdev_dtl_sm, mos, new_object, | |
a1d477c2 | 2626 | 0, -1ULL, 0)); |
93cf2076 | 2627 | ASSERT(vd->vdev_dtl_sm != NULL); |
34dc7c2f BB |
2628 | } |
2629 | ||
a1d477c2 | 2630 | rtsync = range_tree_create(NULL, NULL); |
34dc7c2f BB |
2631 | |
2632 | mutex_enter(&vd->vdev_dtl_lock); | |
93cf2076 | 2633 | range_tree_walk(rt, range_tree_add, rtsync); |
34dc7c2f BB |
2634 | mutex_exit(&vd->vdev_dtl_lock); |
2635 | ||
d2734cce | 2636 | space_map_truncate(vd->vdev_dtl_sm, vdev_dtl_sm_blksz, tx); |
93cf2076 GW |
2637 | space_map_write(vd->vdev_dtl_sm, rtsync, SM_ALLOC, tx); |
2638 | range_tree_vacate(rtsync, NULL, NULL); | |
34dc7c2f | 2639 | |
93cf2076 | 2640 | range_tree_destroy(rtsync); |
34dc7c2f | 2641 | |
93cf2076 GW |
2642 | /* |
2643 | * If the object for the space map has changed then dirty | |
2644 | * the top level so that we update the config. | |
2645 | */ | |
2646 | if (object != space_map_object(vd->vdev_dtl_sm)) { | |
4a0ee12a PZ |
2647 | vdev_dbgmsg(vd, "txg %llu, spa %s, DTL old object %llu, " |
2648 | "new object %llu", (u_longlong_t)txg, spa_name(spa), | |
2649 | (u_longlong_t)object, | |
2650 | (u_longlong_t)space_map_object(vd->vdev_dtl_sm)); | |
93cf2076 GW |
2651 | vdev_config_dirty(vd->vdev_top); |
2652 | } | |
34dc7c2f BB |
2653 | |
2654 | dmu_tx_commit(tx); | |
93cf2076 GW |
2655 | |
2656 | mutex_enter(&vd->vdev_dtl_lock); | |
2657 | space_map_update(vd->vdev_dtl_sm); | |
2658 | mutex_exit(&vd->vdev_dtl_lock); | |
34dc7c2f BB |
2659 | } |
2660 | ||
fb5f0bc8 BB |
2661 | /* |
2662 | * Determine whether the specified vdev can be offlined/detached/removed | |
2663 | * without losing data. | |
2664 | */ | |
2665 | boolean_t | |
2666 | vdev_dtl_required(vdev_t *vd) | |
2667 | { | |
2668 | spa_t *spa = vd->vdev_spa; | |
2669 | vdev_t *tvd = vd->vdev_top; | |
2670 | uint8_t cant_read = vd->vdev_cant_read; | |
2671 | boolean_t required; | |
2672 | ||
2673 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
2674 | ||
2675 | if (vd == spa->spa_root_vdev || vd == tvd) | |
2676 | return (B_TRUE); | |
2677 | ||
2678 | /* | |
2679 | * Temporarily mark the device as unreadable, and then determine | |
2680 | * whether this results in any DTL outages in the top-level vdev. | |
2681 | * If not, we can safely offline/detach/remove the device. | |
2682 | */ | |
2683 | vd->vdev_cant_read = B_TRUE; | |
2684 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
2685 | required = !vdev_dtl_empty(tvd, DTL_OUTAGE); | |
2686 | vd->vdev_cant_read = cant_read; | |
2687 | vdev_dtl_reassess(tvd, 0, 0, B_FALSE); | |
2688 | ||
572e2857 BB |
2689 | if (!required && zio_injection_enabled) |
2690 | required = !!zio_handle_device_injection(vd, NULL, ECHILD); | |
2691 | ||
fb5f0bc8 BB |
2692 | return (required); |
2693 | } | |
2694 | ||
b128c09f BB |
2695 | /* |
2696 | * Determine if resilver is needed, and if so the txg range. | |
2697 | */ | |
2698 | boolean_t | |
2699 | vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp) | |
2700 | { | |
2701 | boolean_t needed = B_FALSE; | |
2702 | uint64_t thismin = UINT64_MAX; | |
2703 | uint64_t thismax = 0; | |
2704 | ||
2705 | if (vd->vdev_children == 0) { | |
2706 | mutex_enter(&vd->vdev_dtl_lock); | |
d2734cce | 2707 | if (!range_tree_is_empty(vd->vdev_dtl[DTL_MISSING]) && |
fb5f0bc8 | 2708 | vdev_writeable(vd)) { |
b128c09f | 2709 | |
5d1f7fb6 GW |
2710 | thismin = vdev_dtl_min(vd); |
2711 | thismax = vdev_dtl_max(vd); | |
b128c09f BB |
2712 | needed = B_TRUE; |
2713 | } | |
2714 | mutex_exit(&vd->vdev_dtl_lock); | |
2715 | } else { | |
1c27024e | 2716 | for (int c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
2717 | vdev_t *cvd = vd->vdev_child[c]; |
2718 | uint64_t cmin, cmax; | |
2719 | ||
2720 | if (vdev_resilver_needed(cvd, &cmin, &cmax)) { | |
2721 | thismin = MIN(thismin, cmin); | |
2722 | thismax = MAX(thismax, cmax); | |
2723 | needed = B_TRUE; | |
2724 | } | |
2725 | } | |
2726 | } | |
2727 | ||
2728 | if (needed && minp) { | |
2729 | *minp = thismin; | |
2730 | *maxp = thismax; | |
2731 | } | |
2732 | return (needed); | |
2733 | } | |
2734 | ||
d2734cce SD |
2735 | /* |
2736 | * Gets the checkpoint space map object from the vdev's ZAP. | |
2737 | * Returns the spacemap object, or 0 if it wasn't in the ZAP | |
2738 | * or the ZAP doesn't exist yet. | |
2739 | */ | |
2740 | int | |
2741 | vdev_checkpoint_sm_object(vdev_t *vd) | |
2742 | { | |
2743 | ASSERT0(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER)); | |
2744 | if (vd->vdev_top_zap == 0) { | |
2745 | return (0); | |
2746 | } | |
2747 | ||
2748 | uint64_t sm_obj = 0; | |
2749 | int err = zap_lookup(spa_meta_objset(vd->vdev_spa), vd->vdev_top_zap, | |
2750 | VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1, &sm_obj); | |
2751 | ||
2752 | VERIFY(err == 0 || err == ENOENT); | |
2753 | ||
2754 | return (sm_obj); | |
2755 | } | |
2756 | ||
a1d477c2 | 2757 | int |
34dc7c2f BB |
2758 | vdev_load(vdev_t *vd) |
2759 | { | |
a1d477c2 MA |
2760 | int error = 0; |
2761 | ||
34dc7c2f BB |
2762 | /* |
2763 | * Recursively load all children. | |
2764 | */ | |
a1d477c2 MA |
2765 | for (int c = 0; c < vd->vdev_children; c++) { |
2766 | error = vdev_load(vd->vdev_child[c]); | |
2767 | if (error != 0) { | |
2768 | return (error); | |
2769 | } | |
2770 | } | |
2771 | ||
2772 | vdev_set_deflate_ratio(vd); | |
34dc7c2f BB |
2773 | |
2774 | /* | |
2775 | * If this is a top-level vdev, initialize its metaslabs. | |
2776 | */ | |
a1d477c2 MA |
2777 | if (vd == vd->vdev_top && vdev_is_concrete(vd)) { |
2778 | if (vd->vdev_ashift == 0 || vd->vdev_asize == 0) { | |
2779 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2780 | VDEV_AUX_CORRUPT_DATA); | |
4a0ee12a PZ |
2781 | vdev_dbgmsg(vd, "vdev_load: invalid size. ashift=%llu, " |
2782 | "asize=%llu", (u_longlong_t)vd->vdev_ashift, | |
2783 | (u_longlong_t)vd->vdev_asize); | |
a1d477c2 MA |
2784 | return (SET_ERROR(ENXIO)); |
2785 | } else if ((error = vdev_metaslab_init(vd, 0)) != 0) { | |
4a0ee12a PZ |
2786 | vdev_dbgmsg(vd, "vdev_load: metaslab_init failed " |
2787 | "[error=%d]", error); | |
a1d477c2 MA |
2788 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
2789 | VDEV_AUX_CORRUPT_DATA); | |
2790 | return (error); | |
2791 | } | |
d2734cce SD |
2792 | |
2793 | uint64_t checkpoint_sm_obj = vdev_checkpoint_sm_object(vd); | |
2794 | if (checkpoint_sm_obj != 0) { | |
2795 | objset_t *mos = spa_meta_objset(vd->vdev_spa); | |
2796 | ASSERT(vd->vdev_asize != 0); | |
2797 | ASSERT3P(vd->vdev_checkpoint_sm, ==, NULL); | |
2798 | ||
2799 | if ((error = space_map_open(&vd->vdev_checkpoint_sm, | |
2800 | mos, checkpoint_sm_obj, 0, vd->vdev_asize, | |
2801 | vd->vdev_ashift))) { | |
2802 | vdev_dbgmsg(vd, "vdev_load: space_map_open " | |
2803 | "failed for checkpoint spacemap (obj %llu) " | |
2804 | "[error=%d]", | |
2805 | (u_longlong_t)checkpoint_sm_obj, error); | |
2806 | return (error); | |
2807 | } | |
2808 | ASSERT3P(vd->vdev_checkpoint_sm, !=, NULL); | |
2809 | space_map_update(vd->vdev_checkpoint_sm); | |
2810 | ||
2811 | /* | |
2812 | * Since the checkpoint_sm contains free entries | |
2813 | * exclusively we can use sm_alloc to indicate the | |
2814 | * culmulative checkpointed space that has been freed. | |
2815 | */ | |
2816 | vd->vdev_stat.vs_checkpoint_space = | |
2817 | -vd->vdev_checkpoint_sm->sm_alloc; | |
2818 | vd->vdev_spa->spa_checkpoint_info.sci_dspace += | |
2819 | vd->vdev_stat.vs_checkpoint_space; | |
2820 | } | |
a1d477c2 MA |
2821 | } |
2822 | ||
34dc7c2f BB |
2823 | /* |
2824 | * If this is a leaf vdev, load its DTL. | |
2825 | */ | |
a1d477c2 | 2826 | if (vd->vdev_ops->vdev_op_leaf && (error = vdev_dtl_load(vd)) != 0) { |
34dc7c2f BB |
2827 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, |
2828 | VDEV_AUX_CORRUPT_DATA); | |
4a0ee12a PZ |
2829 | vdev_dbgmsg(vd, "vdev_load: vdev_dtl_load failed " |
2830 | "[error=%d]", error); | |
a1d477c2 MA |
2831 | return (error); |
2832 | } | |
2833 | ||
2834 | uint64_t obsolete_sm_object = vdev_obsolete_sm_object(vd); | |
2835 | if (obsolete_sm_object != 0) { | |
2836 | objset_t *mos = vd->vdev_spa->spa_meta_objset; | |
2837 | ASSERT(vd->vdev_asize != 0); | |
d2734cce | 2838 | ASSERT3P(vd->vdev_obsolete_sm, ==, NULL); |
a1d477c2 MA |
2839 | |
2840 | if ((error = space_map_open(&vd->vdev_obsolete_sm, mos, | |
2841 | obsolete_sm_object, 0, vd->vdev_asize, 0))) { | |
2842 | vdev_set_state(vd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
2843 | VDEV_AUX_CORRUPT_DATA); | |
4a0ee12a PZ |
2844 | vdev_dbgmsg(vd, "vdev_load: space_map_open failed for " |
2845 | "obsolete spacemap (obj %llu) [error=%d]", | |
2846 | (u_longlong_t)obsolete_sm_object, error); | |
a1d477c2 MA |
2847 | return (error); |
2848 | } | |
2849 | space_map_update(vd->vdev_obsolete_sm); | |
2850 | } | |
2851 | ||
2852 | return (0); | |
34dc7c2f BB |
2853 | } |
2854 | ||
2855 | /* | |
2856 | * The special vdev case is used for hot spares and l2cache devices. Its | |
2857 | * sole purpose it to set the vdev state for the associated vdev. To do this, | |
2858 | * we make sure that we can open the underlying device, then try to read the | |
2859 | * label, and make sure that the label is sane and that it hasn't been | |
2860 | * repurposed to another pool. | |
2861 | */ | |
2862 | int | |
2863 | vdev_validate_aux(vdev_t *vd) | |
2864 | { | |
2865 | nvlist_t *label; | |
2866 | uint64_t guid, version; | |
2867 | uint64_t state; | |
2868 | ||
b128c09f BB |
2869 | if (!vdev_readable(vd)) |
2870 | return (0); | |
2871 | ||
3bc7e0fb | 2872 | if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) { |
34dc7c2f BB |
2873 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, |
2874 | VDEV_AUX_CORRUPT_DATA); | |
2875 | return (-1); | |
2876 | } | |
2877 | ||
2878 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_VERSION, &version) != 0 || | |
9ae529ec | 2879 | !SPA_VERSION_IS_SUPPORTED(version) || |
34dc7c2f BB |
2880 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &guid) != 0 || |
2881 | guid != vd->vdev_guid || | |
2882 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, &state) != 0) { | |
2883 | vdev_set_state(vd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
2884 | VDEV_AUX_CORRUPT_DATA); | |
2885 | nvlist_free(label); | |
2886 | return (-1); | |
2887 | } | |
2888 | ||
2889 | /* | |
2890 | * We don't actually check the pool state here. If it's in fact in | |
2891 | * use by another pool, we update this fact on the fly when requested. | |
2892 | */ | |
2893 | nvlist_free(label); | |
2894 | return (0); | |
2895 | } | |
2896 | ||
a1d477c2 MA |
2897 | /* |
2898 | * Free the objects used to store this vdev's spacemaps, and the array | |
2899 | * that points to them. | |
2900 | */ | |
428870ff | 2901 | void |
a1d477c2 MA |
2902 | vdev_destroy_spacemaps(vdev_t *vd, dmu_tx_t *tx) |
2903 | { | |
2904 | if (vd->vdev_ms_array == 0) | |
2905 | return; | |
2906 | ||
2907 | objset_t *mos = vd->vdev_spa->spa_meta_objset; | |
2908 | uint64_t array_count = vd->vdev_asize >> vd->vdev_ms_shift; | |
2909 | size_t array_bytes = array_count * sizeof (uint64_t); | |
2910 | uint64_t *smobj_array = kmem_alloc(array_bytes, KM_SLEEP); | |
2911 | VERIFY0(dmu_read(mos, vd->vdev_ms_array, 0, | |
2912 | array_bytes, smobj_array, 0)); | |
2913 | ||
2914 | for (uint64_t i = 0; i < array_count; i++) { | |
2915 | uint64_t smobj = smobj_array[i]; | |
2916 | if (smobj == 0) | |
2917 | continue; | |
2918 | ||
2919 | space_map_free_obj(mos, smobj, tx); | |
2920 | } | |
2921 | ||
2922 | kmem_free(smobj_array, array_bytes); | |
2923 | VERIFY0(dmu_object_free(mos, vd->vdev_ms_array, tx)); | |
2924 | vd->vdev_ms_array = 0; | |
2925 | } | |
2926 | ||
2927 | static void | |
2928 | vdev_remove_empty(vdev_t *vd, uint64_t txg) | |
428870ff BB |
2929 | { |
2930 | spa_t *spa = vd->vdev_spa; | |
428870ff BB |
2931 | dmu_tx_t *tx; |
2932 | ||
e0ab3ab5 JS |
2933 | ASSERT(vd == vd->vdev_top); |
2934 | ASSERT3U(txg, ==, spa_syncing_txg(spa)); | |
428870ff | 2935 | |
428870ff | 2936 | if (vd->vdev_ms != NULL) { |
f3a7f661 GW |
2937 | metaslab_group_t *mg = vd->vdev_mg; |
2938 | ||
2939 | metaslab_group_histogram_verify(mg); | |
2940 | metaslab_class_histogram_verify(mg->mg_class); | |
2941 | ||
1c27024e | 2942 | for (int m = 0; m < vd->vdev_ms_count; m++) { |
428870ff BB |
2943 | metaslab_t *msp = vd->vdev_ms[m]; |
2944 | ||
93cf2076 | 2945 | if (msp == NULL || msp->ms_sm == NULL) |
428870ff BB |
2946 | continue; |
2947 | ||
93cf2076 | 2948 | mutex_enter(&msp->ms_lock); |
f3a7f661 GW |
2949 | /* |
2950 | * If the metaslab was not loaded when the vdev | |
2951 | * was removed then the histogram accounting may | |
2952 | * not be accurate. Update the histogram information | |
2953 | * here so that we ensure that the metaslab group | |
2954 | * and metaslab class are up-to-date. | |
2955 | */ | |
2956 | metaslab_group_histogram_remove(mg, msp); | |
2957 | ||
93cf2076 | 2958 | VERIFY0(space_map_allocated(msp->ms_sm)); |
93cf2076 GW |
2959 | space_map_close(msp->ms_sm); |
2960 | msp->ms_sm = NULL; | |
2961 | mutex_exit(&msp->ms_lock); | |
428870ff | 2962 | } |
f3a7f661 | 2963 | |
d2734cce SD |
2964 | if (vd->vdev_checkpoint_sm != NULL) { |
2965 | ASSERT(spa_has_checkpoint(spa)); | |
2966 | space_map_close(vd->vdev_checkpoint_sm); | |
2967 | vd->vdev_checkpoint_sm = NULL; | |
2968 | } | |
2969 | ||
f3a7f661 GW |
2970 | metaslab_group_histogram_verify(mg); |
2971 | metaslab_class_histogram_verify(mg->mg_class); | |
1c27024e | 2972 | for (int i = 0; i < RANGE_TREE_HISTOGRAM_SIZE; i++) |
f3a7f661 | 2973 | ASSERT0(mg->mg_histogram[i]); |
428870ff BB |
2974 | } |
2975 | ||
a1d477c2 MA |
2976 | tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg); |
2977 | vdev_destroy_spacemaps(vd, tx); | |
e0ab3ab5 JS |
2978 | |
2979 | if (vd->vdev_islog && vd->vdev_top_zap != 0) { | |
2980 | vdev_destroy_unlink_zap(vd, vd->vdev_top_zap, tx); | |
2981 | vd->vdev_top_zap = 0; | |
2982 | } | |
428870ff BB |
2983 | dmu_tx_commit(tx); |
2984 | } | |
2985 | ||
34dc7c2f BB |
2986 | void |
2987 | vdev_sync_done(vdev_t *vd, uint64_t txg) | |
2988 | { | |
2989 | metaslab_t *msp; | |
428870ff BB |
2990 | boolean_t reassess = !txg_list_empty(&vd->vdev_ms_list, TXG_CLEAN(txg)); |
2991 | ||
a1d477c2 | 2992 | ASSERT(vdev_is_concrete(vd)); |
34dc7c2f | 2993 | |
c65aa5b2 | 2994 | while ((msp = txg_list_remove(&vd->vdev_ms_list, TXG_CLEAN(txg)))) |
34dc7c2f | 2995 | metaslab_sync_done(msp, txg); |
428870ff BB |
2996 | |
2997 | if (reassess) | |
2998 | metaslab_sync_reassess(vd->vdev_mg); | |
34dc7c2f BB |
2999 | } |
3000 | ||
3001 | void | |
3002 | vdev_sync(vdev_t *vd, uint64_t txg) | |
3003 | { | |
3004 | spa_t *spa = vd->vdev_spa; | |
3005 | vdev_t *lvd; | |
3006 | metaslab_t *msp; | |
3007 | dmu_tx_t *tx; | |
3008 | ||
a1d477c2 MA |
3009 | if (range_tree_space(vd->vdev_obsolete_segments) > 0) { |
3010 | dmu_tx_t *tx; | |
428870ff | 3011 | |
a1d477c2 MA |
3012 | ASSERT(vd->vdev_removing || |
3013 | vd->vdev_ops == &vdev_indirect_ops); | |
3014 | ||
3015 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
3016 | vdev_indirect_sync_obsolete(vd, tx); | |
3017 | dmu_tx_commit(tx); | |
3018 | ||
3019 | /* | |
3020 | * If the vdev is indirect, it can't have dirty | |
3021 | * metaslabs or DTLs. | |
3022 | */ | |
3023 | if (vd->vdev_ops == &vdev_indirect_ops) { | |
3024 | ASSERT(txg_list_empty(&vd->vdev_ms_list, txg)); | |
3025 | ASSERT(txg_list_empty(&vd->vdev_dtl_list, txg)); | |
3026 | return; | |
3027 | } | |
3028 | } | |
3029 | ||
3030 | ASSERT(vdev_is_concrete(vd)); | |
3031 | ||
3032 | if (vd->vdev_ms_array == 0 && vd->vdev_ms_shift != 0 && | |
3033 | !vd->vdev_removing) { | |
34dc7c2f | 3034 | ASSERT(vd == vd->vdev_top); |
a1d477c2 | 3035 | ASSERT0(vd->vdev_indirect_config.vic_mapping_object); |
34dc7c2f BB |
3036 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); |
3037 | vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset, | |
3038 | DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx); | |
3039 | ASSERT(vd->vdev_ms_array != 0); | |
3040 | vdev_config_dirty(vd); | |
3041 | dmu_tx_commit(tx); | |
3042 | } | |
3043 | ||
3044 | while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) { | |
3045 | metaslab_sync(msp, txg); | |
3046 | (void) txg_list_add(&vd->vdev_ms_list, msp, TXG_CLEAN(txg)); | |
3047 | } | |
3048 | ||
3049 | while ((lvd = txg_list_remove(&vd->vdev_dtl_list, txg)) != NULL) | |
3050 | vdev_dtl_sync(lvd, txg); | |
3051 | ||
a1d477c2 MA |
3052 | /* |
3053 | * Remove the metadata associated with this vdev once it's empty. | |
3054 | * Note that this is typically used for log/cache device removal; | |
3055 | * we don't empty toplevel vdevs when removing them. But if | |
3056 | * a toplevel happens to be emptied, this is not harmful. | |
3057 | */ | |
3058 | if (vd->vdev_stat.vs_alloc == 0 && vd->vdev_removing) { | |
3059 | vdev_remove_empty(vd, txg); | |
3060 | } | |
3061 | ||
34dc7c2f BB |
3062 | (void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg)); |
3063 | } | |
3064 | ||
3065 | uint64_t | |
3066 | vdev_psize_to_asize(vdev_t *vd, uint64_t psize) | |
3067 | { | |
3068 | return (vd->vdev_ops->vdev_op_asize(vd, psize)); | |
3069 | } | |
3070 | ||
34dc7c2f BB |
3071 | /* |
3072 | * Mark the given vdev faulted. A faulted vdev behaves as if the device could | |
3073 | * not be opened, and no I/O is attempted. | |
3074 | */ | |
3075 | int | |
428870ff | 3076 | vdev_fault(spa_t *spa, uint64_t guid, vdev_aux_t aux) |
34dc7c2f | 3077 | { |
572e2857 | 3078 | vdev_t *vd, *tvd; |
34dc7c2f | 3079 | |
428870ff | 3080 | spa_vdev_state_enter(spa, SCL_NONE); |
34dc7c2f | 3081 | |
b128c09f BB |
3082 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
3083 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 3084 | |
34dc7c2f | 3085 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 3086 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 3087 | |
572e2857 BB |
3088 | tvd = vd->vdev_top; |
3089 | ||
4a283c7f TH |
3090 | /* |
3091 | * If user did a 'zpool offline -f' then make the fault persist across | |
3092 | * reboots. | |
3093 | */ | |
3094 | if (aux == VDEV_AUX_EXTERNAL_PERSIST) { | |
3095 | /* | |
3096 | * There are two kinds of forced faults: temporary and | |
3097 | * persistent. Temporary faults go away at pool import, while | |
3098 | * persistent faults stay set. Both types of faults can be | |
3099 | * cleared with a zpool clear. | |
3100 | * | |
3101 | * We tell if a vdev is persistently faulted by looking at the | |
3102 | * ZPOOL_CONFIG_AUX_STATE nvpair. If it's set to "external" at | |
3103 | * import then it's a persistent fault. Otherwise, it's | |
3104 | * temporary. We get ZPOOL_CONFIG_AUX_STATE set to "external" | |
3105 | * by setting vd.vdev_stat.vs_aux to VDEV_AUX_EXTERNAL. This | |
3106 | * tells vdev_config_generate() (which gets run later) to set | |
3107 | * ZPOOL_CONFIG_AUX_STATE to "external" in the nvlist. | |
3108 | */ | |
3109 | vd->vdev_stat.vs_aux = VDEV_AUX_EXTERNAL; | |
3110 | vd->vdev_tmpoffline = B_FALSE; | |
3111 | aux = VDEV_AUX_EXTERNAL; | |
3112 | } else { | |
3113 | vd->vdev_tmpoffline = B_TRUE; | |
3114 | } | |
3115 | ||
428870ff BB |
3116 | /* |
3117 | * We don't directly use the aux state here, but if we do a | |
3118 | * vdev_reopen(), we need this value to be present to remember why we | |
3119 | * were faulted. | |
3120 | */ | |
3121 | vd->vdev_label_aux = aux; | |
3122 | ||
34dc7c2f BB |
3123 | /* |
3124 | * Faulted state takes precedence over degraded. | |
3125 | */ | |
428870ff | 3126 | vd->vdev_delayed_close = B_FALSE; |
34dc7c2f BB |
3127 | vd->vdev_faulted = 1ULL; |
3128 | vd->vdev_degraded = 0ULL; | |
428870ff | 3129 | vdev_set_state(vd, B_FALSE, VDEV_STATE_FAULTED, aux); |
34dc7c2f BB |
3130 | |
3131 | /* | |
428870ff BB |
3132 | * If this device has the only valid copy of the data, then |
3133 | * back off and simply mark the vdev as degraded instead. | |
34dc7c2f | 3134 | */ |
572e2857 | 3135 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && vdev_dtl_required(vd)) { |
34dc7c2f BB |
3136 | vd->vdev_degraded = 1ULL; |
3137 | vd->vdev_faulted = 0ULL; | |
3138 | ||
3139 | /* | |
3140 | * If we reopen the device and it's not dead, only then do we | |
3141 | * mark it degraded. | |
3142 | */ | |
572e2857 | 3143 | vdev_reopen(tvd); |
34dc7c2f | 3144 | |
428870ff BB |
3145 | if (vdev_readable(vd)) |
3146 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, aux); | |
34dc7c2f BB |
3147 | } |
3148 | ||
b128c09f | 3149 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
3150 | } |
3151 | ||
3152 | /* | |
3153 | * Mark the given vdev degraded. A degraded vdev is purely an indication to the | |
3154 | * user that something is wrong. The vdev continues to operate as normal as far | |
3155 | * as I/O is concerned. | |
3156 | */ | |
3157 | int | |
428870ff | 3158 | vdev_degrade(spa_t *spa, uint64_t guid, vdev_aux_t aux) |
34dc7c2f | 3159 | { |
b128c09f | 3160 | vdev_t *vd; |
34dc7c2f | 3161 | |
428870ff | 3162 | spa_vdev_state_enter(spa, SCL_NONE); |
34dc7c2f | 3163 | |
b128c09f BB |
3164 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
3165 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f | 3166 | |
34dc7c2f | 3167 | if (!vd->vdev_ops->vdev_op_leaf) |
b128c09f | 3168 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f BB |
3169 | |
3170 | /* | |
3171 | * If the vdev is already faulted, then don't do anything. | |
3172 | */ | |
b128c09f BB |
3173 | if (vd->vdev_faulted || vd->vdev_degraded) |
3174 | return (spa_vdev_state_exit(spa, NULL, 0)); | |
34dc7c2f BB |
3175 | |
3176 | vd->vdev_degraded = 1ULL; | |
3177 | if (!vdev_is_dead(vd)) | |
3178 | vdev_set_state(vd, B_FALSE, VDEV_STATE_DEGRADED, | |
428870ff | 3179 | aux); |
34dc7c2f | 3180 | |
b128c09f | 3181 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
3182 | } |
3183 | ||
3184 | /* | |
d3cc8b15 WA |
3185 | * Online the given vdev. |
3186 | * | |
3187 | * If 'ZFS_ONLINE_UNSPARE' is set, it implies two things. First, any attached | |
3188 | * spare device should be detached when the device finishes resilvering. | |
3189 | * Second, the online should be treated like a 'test' online case, so no FMA | |
3190 | * events are generated if the device fails to open. | |
34dc7c2f BB |
3191 | */ |
3192 | int | |
b128c09f | 3193 | vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate) |
34dc7c2f | 3194 | { |
9babb374 | 3195 | vdev_t *vd, *tvd, *pvd, *rvd = spa->spa_root_vdev; |
153b2285 YP |
3196 | boolean_t wasoffline; |
3197 | vdev_state_t oldstate; | |
34dc7c2f | 3198 | |
428870ff | 3199 | spa_vdev_state_enter(spa, SCL_NONE); |
34dc7c2f | 3200 | |
b128c09f BB |
3201 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
3202 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
3203 | |
3204 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 3205 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 3206 | |
153b2285 YP |
3207 | wasoffline = (vd->vdev_offline || vd->vdev_tmpoffline); |
3208 | oldstate = vd->vdev_state; | |
fb390aaf | 3209 | |
9babb374 | 3210 | tvd = vd->vdev_top; |
34dc7c2f BB |
3211 | vd->vdev_offline = B_FALSE; |
3212 | vd->vdev_tmpoffline = B_FALSE; | |
b128c09f BB |
3213 | vd->vdev_checkremove = !!(flags & ZFS_ONLINE_CHECKREMOVE); |
3214 | vd->vdev_forcefault = !!(flags & ZFS_ONLINE_FORCEFAULT); | |
9babb374 BB |
3215 | |
3216 | /* XXX - L2ARC 1.0 does not support expansion */ | |
3217 | if (!vd->vdev_aux) { | |
3218 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
3219 | pvd->vdev_expanding = !!(flags & ZFS_ONLINE_EXPAND); | |
3220 | } | |
3221 | ||
3222 | vdev_reopen(tvd); | |
34dc7c2f BB |
3223 | vd->vdev_checkremove = vd->vdev_forcefault = B_FALSE; |
3224 | ||
9babb374 BB |
3225 | if (!vd->vdev_aux) { |
3226 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) | |
3227 | pvd->vdev_expanding = B_FALSE; | |
3228 | } | |
3229 | ||
34dc7c2f BB |
3230 | if (newstate) |
3231 | *newstate = vd->vdev_state; | |
3232 | if ((flags & ZFS_ONLINE_UNSPARE) && | |
3233 | !vdev_is_dead(vd) && vd->vdev_parent && | |
3234 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
3235 | vd->vdev_parent->vdev_child[0] == vd) | |
3236 | vd->vdev_unspare = B_TRUE; | |
3237 | ||
9babb374 BB |
3238 | if ((flags & ZFS_ONLINE_EXPAND) || spa->spa_autoexpand) { |
3239 | ||
3240 | /* XXX - L2ARC 1.0 does not support expansion */ | |
3241 | if (vd->vdev_aux) | |
3242 | return (spa_vdev_state_exit(spa, vd, ENOTSUP)); | |
3243 | spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); | |
3244 | } | |
fb390aaf | 3245 | |
153b2285 YP |
3246 | if (wasoffline || |
3247 | (oldstate < VDEV_STATE_DEGRADED && | |
3248 | vd->vdev_state >= VDEV_STATE_DEGRADED)) | |
12fa0466 | 3249 | spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_ONLINE); |
fb390aaf | 3250 | |
fb5f0bc8 | 3251 | return (spa_vdev_state_exit(spa, vd, 0)); |
34dc7c2f BB |
3252 | } |
3253 | ||
428870ff BB |
3254 | static int |
3255 | vdev_offline_locked(spa_t *spa, uint64_t guid, uint64_t flags) | |
34dc7c2f | 3256 | { |
9babb374 | 3257 | vdev_t *vd, *tvd; |
428870ff BB |
3258 | int error = 0; |
3259 | uint64_t generation; | |
3260 | metaslab_group_t *mg; | |
34dc7c2f | 3261 | |
428870ff BB |
3262 | top: |
3263 | spa_vdev_state_enter(spa, SCL_ALLOC); | |
34dc7c2f | 3264 | |
b128c09f BB |
3265 | if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) |
3266 | return (spa_vdev_state_exit(spa, NULL, ENODEV)); | |
34dc7c2f BB |
3267 | |
3268 | if (!vd->vdev_ops->vdev_op_leaf) | |
b128c09f | 3269 | return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); |
34dc7c2f | 3270 | |
9babb374 | 3271 | tvd = vd->vdev_top; |
428870ff BB |
3272 | mg = tvd->vdev_mg; |
3273 | generation = spa->spa_config_generation + 1; | |
9babb374 | 3274 | |
34dc7c2f BB |
3275 | /* |
3276 | * If the device isn't already offline, try to offline it. | |
3277 | */ | |
3278 | if (!vd->vdev_offline) { | |
3279 | /* | |
fb5f0bc8 | 3280 | * If this device has the only valid copy of some data, |
9babb374 BB |
3281 | * don't allow it to be offlined. Log devices are always |
3282 | * expendable. | |
34dc7c2f | 3283 | */ |
9babb374 BB |
3284 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && |
3285 | vdev_dtl_required(vd)) | |
b128c09f | 3286 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f | 3287 | |
428870ff BB |
3288 | /* |
3289 | * If the top-level is a slog and it has had allocations | |
3290 | * then proceed. We check that the vdev's metaslab group | |
3291 | * is not NULL since it's possible that we may have just | |
3292 | * added this vdev but not yet initialized its metaslabs. | |
3293 | */ | |
3294 | if (tvd->vdev_islog && mg != NULL) { | |
3295 | /* | |
3296 | * Prevent any future allocations. | |
3297 | */ | |
3298 | metaslab_group_passivate(mg); | |
3299 | (void) spa_vdev_state_exit(spa, vd, 0); | |
3300 | ||
a1d477c2 | 3301 | error = spa_reset_logs(spa); |
428870ff | 3302 | |
d2734cce SD |
3303 | /* |
3304 | * If the log device was successfully reset but has | |
3305 | * checkpointed data, do not offline it. | |
3306 | */ | |
3307 | if (error == 0 && | |
3308 | tvd->vdev_checkpoint_sm != NULL) { | |
3309 | ASSERT3U(tvd->vdev_checkpoint_sm->sm_alloc, | |
3310 | !=, 0); | |
3311 | error = ZFS_ERR_CHECKPOINT_EXISTS; | |
3312 | } | |
3313 | ||
428870ff BB |
3314 | spa_vdev_state_enter(spa, SCL_ALLOC); |
3315 | ||
3316 | /* | |
3317 | * Check to see if the config has changed. | |
3318 | */ | |
3319 | if (error || generation != spa->spa_config_generation) { | |
3320 | metaslab_group_activate(mg); | |
3321 | if (error) | |
3322 | return (spa_vdev_state_exit(spa, | |
3323 | vd, error)); | |
3324 | (void) spa_vdev_state_exit(spa, vd, 0); | |
3325 | goto top; | |
3326 | } | |
c99c9001 | 3327 | ASSERT0(tvd->vdev_stat.vs_alloc); |
428870ff BB |
3328 | } |
3329 | ||
34dc7c2f BB |
3330 | /* |
3331 | * Offline this device and reopen its top-level vdev. | |
9babb374 BB |
3332 | * If the top-level vdev is a log device then just offline |
3333 | * it. Otherwise, if this action results in the top-level | |
3334 | * vdev becoming unusable, undo it and fail the request. | |
34dc7c2f BB |
3335 | */ |
3336 | vd->vdev_offline = B_TRUE; | |
9babb374 BB |
3337 | vdev_reopen(tvd); |
3338 | ||
3339 | if (!tvd->vdev_islog && vd->vdev_aux == NULL && | |
3340 | vdev_is_dead(tvd)) { | |
34dc7c2f | 3341 | vd->vdev_offline = B_FALSE; |
9babb374 | 3342 | vdev_reopen(tvd); |
b128c09f | 3343 | return (spa_vdev_state_exit(spa, NULL, EBUSY)); |
34dc7c2f | 3344 | } |
428870ff BB |
3345 | |
3346 | /* | |
3347 | * Add the device back into the metaslab rotor so that | |
3348 | * once we online the device it's open for business. | |
3349 | */ | |
3350 | if (tvd->vdev_islog && mg != NULL) | |
3351 | metaslab_group_activate(mg); | |
34dc7c2f BB |
3352 | } |
3353 | ||
b128c09f | 3354 | vd->vdev_tmpoffline = !!(flags & ZFS_OFFLINE_TEMPORARY); |
34dc7c2f | 3355 | |
428870ff BB |
3356 | return (spa_vdev_state_exit(spa, vd, 0)); |
3357 | } | |
9babb374 | 3358 | |
428870ff BB |
3359 | int |
3360 | vdev_offline(spa_t *spa, uint64_t guid, uint64_t flags) | |
3361 | { | |
3362 | int error; | |
9babb374 | 3363 | |
428870ff BB |
3364 | mutex_enter(&spa->spa_vdev_top_lock); |
3365 | error = vdev_offline_locked(spa, guid, flags); | |
3366 | mutex_exit(&spa->spa_vdev_top_lock); | |
3367 | ||
3368 | return (error); | |
34dc7c2f BB |
3369 | } |
3370 | ||
3371 | /* | |
3372 | * Clear the error counts associated with this vdev. Unlike vdev_online() and | |
3373 | * vdev_offline(), we assume the spa config is locked. We also clear all | |
3374 | * children. If 'vd' is NULL, then the user wants to clear all vdevs. | |
34dc7c2f BB |
3375 | */ |
3376 | void | |
b128c09f | 3377 | vdev_clear(spa_t *spa, vdev_t *vd) |
34dc7c2f | 3378 | { |
b128c09f BB |
3379 | vdev_t *rvd = spa->spa_root_vdev; |
3380 | ||
3381 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); | |
34dc7c2f BB |
3382 | |
3383 | if (vd == NULL) | |
b128c09f | 3384 | vd = rvd; |
34dc7c2f BB |
3385 | |
3386 | vd->vdev_stat.vs_read_errors = 0; | |
3387 | vd->vdev_stat.vs_write_errors = 0; | |
3388 | vd->vdev_stat.vs_checksum_errors = 0; | |
34dc7c2f | 3389 | |
1c27024e | 3390 | for (int c = 0; c < vd->vdev_children; c++) |
b128c09f | 3391 | vdev_clear(spa, vd->vdev_child[c]); |
34dc7c2f | 3392 | |
a1d477c2 MA |
3393 | /* |
3394 | * It makes no sense to "clear" an indirect vdev. | |
3395 | */ | |
3396 | if (!vdev_is_concrete(vd)) | |
3397 | return; | |
3398 | ||
34dc7c2f | 3399 | /* |
b128c09f BB |
3400 | * If we're in the FAULTED state or have experienced failed I/O, then |
3401 | * clear the persistent state and attempt to reopen the device. We | |
3402 | * also mark the vdev config dirty, so that the new faulted state is | |
3403 | * written out to disk. | |
34dc7c2f | 3404 | */ |
b128c09f BB |
3405 | if (vd->vdev_faulted || vd->vdev_degraded || |
3406 | !vdev_readable(vd) || !vdev_writeable(vd)) { | |
428870ff | 3407 | /* |
4e33ba4c | 3408 | * When reopening in response to a clear event, it may be due to |
428870ff BB |
3409 | * a fmadm repair request. In this case, if the device is |
3410 | * still broken, we want to still post the ereport again. | |
3411 | */ | |
3412 | vd->vdev_forcefault = B_TRUE; | |
3413 | ||
572e2857 | 3414 | vd->vdev_faulted = vd->vdev_degraded = 0ULL; |
b128c09f BB |
3415 | vd->vdev_cant_read = B_FALSE; |
3416 | vd->vdev_cant_write = B_FALSE; | |
4a283c7f | 3417 | vd->vdev_stat.vs_aux = 0; |
b128c09f | 3418 | |
572e2857 | 3419 | vdev_reopen(vd == rvd ? rvd : vd->vdev_top); |
34dc7c2f | 3420 | |
428870ff BB |
3421 | vd->vdev_forcefault = B_FALSE; |
3422 | ||
572e2857 | 3423 | if (vd != rvd && vdev_writeable(vd->vdev_top)) |
b128c09f BB |
3424 | vdev_state_dirty(vd->vdev_top); |
3425 | ||
3426 | if (vd->vdev_aux == NULL && !vdev_is_dead(vd)) | |
34dc7c2f BB |
3427 | spa_async_request(spa, SPA_ASYNC_RESILVER); |
3428 | ||
12fa0466 | 3429 | spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_CLEAR); |
34dc7c2f | 3430 | } |
428870ff BB |
3431 | |
3432 | /* | |
3433 | * When clearing a FMA-diagnosed fault, we always want to | |
3434 | * unspare the device, as we assume that the original spare was | |
3435 | * done in response to the FMA fault. | |
3436 | */ | |
3437 | if (!vdev_is_dead(vd) && vd->vdev_parent != NULL && | |
3438 | vd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
3439 | vd->vdev_parent->vdev_child[0] == vd) | |
3440 | vd->vdev_unspare = B_TRUE; | |
34dc7c2f BB |
3441 | } |
3442 | ||
b128c09f BB |
3443 | boolean_t |
3444 | vdev_is_dead(vdev_t *vd) | |
3445 | { | |
428870ff BB |
3446 | /* |
3447 | * Holes and missing devices are always considered "dead". | |
3448 | * This simplifies the code since we don't have to check for | |
3449 | * these types of devices in the various code paths. | |
3450 | * Instead we rely on the fact that we skip over dead devices | |
3451 | * before issuing I/O to them. | |
3452 | */ | |
a1d477c2 MA |
3453 | return (vd->vdev_state < VDEV_STATE_DEGRADED || |
3454 | vd->vdev_ops == &vdev_hole_ops || | |
428870ff | 3455 | vd->vdev_ops == &vdev_missing_ops); |
b128c09f BB |
3456 | } |
3457 | ||
3458 | boolean_t | |
34dc7c2f BB |
3459 | vdev_readable(vdev_t *vd) |
3460 | { | |
b128c09f | 3461 | return (!vdev_is_dead(vd) && !vd->vdev_cant_read); |
34dc7c2f BB |
3462 | } |
3463 | ||
b128c09f | 3464 | boolean_t |
34dc7c2f BB |
3465 | vdev_writeable(vdev_t *vd) |
3466 | { | |
a1d477c2 MA |
3467 | return (!vdev_is_dead(vd) && !vd->vdev_cant_write && |
3468 | vdev_is_concrete(vd)); | |
34dc7c2f BB |
3469 | } |
3470 | ||
b128c09f BB |
3471 | boolean_t |
3472 | vdev_allocatable(vdev_t *vd) | |
34dc7c2f | 3473 | { |
fb5f0bc8 BB |
3474 | uint64_t state = vd->vdev_state; |
3475 | ||
b128c09f | 3476 | /* |
fb5f0bc8 | 3477 | * We currently allow allocations from vdevs which may be in the |
b128c09f BB |
3478 | * process of reopening (i.e. VDEV_STATE_CLOSED). If the device |
3479 | * fails to reopen then we'll catch it later when we're holding | |
fb5f0bc8 BB |
3480 | * the proper locks. Note that we have to get the vdev state |
3481 | * in a local variable because although it changes atomically, | |
3482 | * we're asking two separate questions about it. | |
b128c09f | 3483 | */ |
fb5f0bc8 | 3484 | return (!(state < VDEV_STATE_DEGRADED && state != VDEV_STATE_CLOSED) && |
a1d477c2 | 3485 | !vd->vdev_cant_write && vdev_is_concrete(vd) && |
3dfb57a3 | 3486 | vd->vdev_mg->mg_initialized); |
34dc7c2f BB |
3487 | } |
3488 | ||
b128c09f BB |
3489 | boolean_t |
3490 | vdev_accessible(vdev_t *vd, zio_t *zio) | |
34dc7c2f | 3491 | { |
b128c09f | 3492 | ASSERT(zio->io_vd == vd); |
34dc7c2f | 3493 | |
b128c09f BB |
3494 | if (vdev_is_dead(vd) || vd->vdev_remove_wanted) |
3495 | return (B_FALSE); | |
34dc7c2f | 3496 | |
b128c09f BB |
3497 | if (zio->io_type == ZIO_TYPE_READ) |
3498 | return (!vd->vdev_cant_read); | |
34dc7c2f | 3499 | |
b128c09f BB |
3500 | if (zio->io_type == ZIO_TYPE_WRITE) |
3501 | return (!vd->vdev_cant_write); | |
34dc7c2f | 3502 | |
b128c09f | 3503 | return (B_TRUE); |
34dc7c2f BB |
3504 | } |
3505 | ||
193a37cb TH |
3506 | static void |
3507 | vdev_get_child_stat(vdev_t *cvd, vdev_stat_t *vs, vdev_stat_t *cvs) | |
34dc7c2f | 3508 | { |
193a37cb TH |
3509 | int t; |
3510 | for (t = 0; t < ZIO_TYPES; t++) { | |
3511 | vs->vs_ops[t] += cvs->vs_ops[t]; | |
3512 | vs->vs_bytes[t] += cvs->vs_bytes[t]; | |
3513 | } | |
34dc7c2f | 3514 | |
193a37cb TH |
3515 | cvs->vs_scan_removing = cvd->vdev_removing; |
3516 | } | |
f3a7f661 | 3517 | |
193a37cb TH |
3518 | /* |
3519 | * Get extended stats | |
3520 | */ | |
3521 | static void | |
3522 | vdev_get_child_stat_ex(vdev_t *cvd, vdev_stat_ex_t *vsx, vdev_stat_ex_t *cvsx) | |
3523 | { | |
3524 | int t, b; | |
3525 | for (t = 0; t < ZIO_TYPES; t++) { | |
7e945072 | 3526 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_disk_histo[0]); b++) |
193a37cb | 3527 | vsx->vsx_disk_histo[t][b] += cvsx->vsx_disk_histo[t][b]; |
7e945072 TH |
3528 | |
3529 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_total_histo[0]); b++) { | |
193a37cb TH |
3530 | vsx->vsx_total_histo[t][b] += |
3531 | cvsx->vsx_total_histo[t][b]; | |
3532 | } | |
f38dfec3 | 3533 | } |
34dc7c2f | 3534 | |
193a37cb | 3535 | for (t = 0; t < ZIO_PRIORITY_NUM_QUEUEABLE; t++) { |
7e945072 | 3536 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_queue_histo[0]); b++) { |
193a37cb TH |
3537 | vsx->vsx_queue_histo[t][b] += |
3538 | cvsx->vsx_queue_histo[t][b]; | |
3539 | } | |
3540 | vsx->vsx_active_queue[t] += cvsx->vsx_active_queue[t]; | |
3541 | vsx->vsx_pend_queue[t] += cvsx->vsx_pend_queue[t]; | |
7e945072 TH |
3542 | |
3543 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_ind_histo[0]); b++) | |
3544 | vsx->vsx_ind_histo[t][b] += cvsx->vsx_ind_histo[t][b]; | |
3545 | ||
3546 | for (b = 0; b < ARRAY_SIZE(vsx->vsx_agg_histo[0]); b++) | |
3547 | vsx->vsx_agg_histo[t][b] += cvsx->vsx_agg_histo[t][b]; | |
193a37cb | 3548 | } |
7e945072 | 3549 | |
193a37cb TH |
3550 | } |
3551 | ||
d2734cce SD |
3552 | boolean_t |
3553 | vdev_is_spacemap_addressable(vdev_t *vd) | |
3554 | { | |
3555 | /* | |
3556 | * Assuming 47 bits of the space map entry dedicated for the entry's | |
3557 | * offset (see description in space_map.h), we calculate the maximum | |
3558 | * address that can be described by a space map entry for the given | |
3559 | * device. | |
3560 | */ | |
3561 | uint64_t shift = vd->vdev_ashift + 47; | |
3562 | ||
3563 | if (shift >= 63) /* detect potential overflow */ | |
3564 | return (B_TRUE); | |
3565 | ||
3566 | return (vd->vdev_asize < (1ULL << shift)); | |
3567 | } | |
3568 | ||
193a37cb TH |
3569 | /* |
3570 | * Get statistics for the given vdev. | |
3571 | */ | |
3572 | static void | |
3573 | vdev_get_stats_ex_impl(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx) | |
3574 | { | |
1c27024e | 3575 | int t; |
34dc7c2f BB |
3576 | /* |
3577 | * If we're getting stats on the root vdev, aggregate the I/O counts | |
3578 | * over all top-level vdevs (i.e. the direct children of the root). | |
3579 | */ | |
193a37cb TH |
3580 | if (!vd->vdev_ops->vdev_op_leaf) { |
3581 | if (vs) { | |
3582 | memset(vs->vs_ops, 0, sizeof (vs->vs_ops)); | |
3583 | memset(vs->vs_bytes, 0, sizeof (vs->vs_bytes)); | |
3584 | } | |
3585 | if (vsx) | |
3586 | memset(vsx, 0, sizeof (*vsx)); | |
3587 | ||
1c27024e | 3588 | for (int c = 0; c < vd->vdev_children; c++) { |
193a37cb | 3589 | vdev_t *cvd = vd->vdev_child[c]; |
34dc7c2f | 3590 | vdev_stat_t *cvs = &cvd->vdev_stat; |
193a37cb TH |
3591 | vdev_stat_ex_t *cvsx = &cvd->vdev_stat_ex; |
3592 | ||
3593 | vdev_get_stats_ex_impl(cvd, cvs, cvsx); | |
3594 | if (vs) | |
3595 | vdev_get_child_stat(cvd, vs, cvs); | |
3596 | if (vsx) | |
3597 | vdev_get_child_stat_ex(cvd, vsx, cvsx); | |
34dc7c2f | 3598 | |
193a37cb TH |
3599 | } |
3600 | } else { | |
3601 | /* | |
3602 | * We're a leaf. Just copy our ZIO active queue stats in. The | |
3603 | * other leaf stats are updated in vdev_stat_update(). | |
3604 | */ | |
3605 | if (!vsx) | |
3606 | return; | |
3607 | ||
3608 | memcpy(vsx, &vd->vdev_stat_ex, sizeof (vd->vdev_stat_ex)); | |
3609 | ||
3610 | for (t = 0; t < ARRAY_SIZE(vd->vdev_queue.vq_class); t++) { | |
3611 | vsx->vsx_active_queue[t] = | |
3612 | vd->vdev_queue.vq_class[t].vqc_active; | |
3613 | vsx->vsx_pend_queue[t] = avl_numnodes( | |
3614 | &vd->vdev_queue.vq_class[t].vqc_queued_tree); | |
34dc7c2f BB |
3615 | } |
3616 | } | |
193a37cb TH |
3617 | } |
3618 | ||
3619 | void | |
3620 | vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx) | |
3621 | { | |
0f676dc2 | 3622 | vdev_t *tvd = vd->vdev_top; |
193a37cb TH |
3623 | mutex_enter(&vd->vdev_stat_lock); |
3624 | if (vs) { | |
3625 | bcopy(&vd->vdev_stat, vs, sizeof (*vs)); | |
3626 | vs->vs_timestamp = gethrtime() - vs->vs_timestamp; | |
3627 | vs->vs_state = vd->vdev_state; | |
3628 | vs->vs_rsize = vdev_get_min_asize(vd); | |
3629 | if (vd->vdev_ops->vdev_op_leaf) | |
3630 | vs->vs_rsize += VDEV_LABEL_START_SIZE + | |
3631 | VDEV_LABEL_END_SIZE; | |
0f676dc2 GM |
3632 | /* |
3633 | * Report expandable space on top-level, non-auxillary devices | |
3634 | * only. The expandable space is reported in terms of metaslab | |
3635 | * sized units since that determines how much space the pool | |
3636 | * can expand. | |
3637 | */ | |
3638 | if (vd->vdev_aux == NULL && tvd != NULL) { | |
3639 | vs->vs_esize = P2ALIGN( | |
3640 | vd->vdev_max_asize - vd->vdev_asize, | |
3641 | 1ULL << tvd->vdev_ms_shift); | |
3642 | } | |
193a37cb | 3643 | if (vd->vdev_aux == NULL && vd == vd->vdev_top && |
a1d477c2 | 3644 | vdev_is_concrete(vd)) { |
193a37cb TH |
3645 | vs->vs_fragmentation = vd->vdev_mg->mg_fragmentation; |
3646 | } | |
3647 | } | |
3648 | ||
3649 | ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_READER) != 0); | |
3650 | vdev_get_stats_ex_impl(vd, vs, vsx); | |
f3a7f661 | 3651 | mutex_exit(&vd->vdev_stat_lock); |
34dc7c2f BB |
3652 | } |
3653 | ||
193a37cb TH |
3654 | void |
3655 | vdev_get_stats(vdev_t *vd, vdev_stat_t *vs) | |
3656 | { | |
3657 | return (vdev_get_stats_ex(vd, vs, NULL)); | |
3658 | } | |
3659 | ||
34dc7c2f BB |
3660 | void |
3661 | vdev_clear_stats(vdev_t *vd) | |
3662 | { | |
3663 | mutex_enter(&vd->vdev_stat_lock); | |
3664 | vd->vdev_stat.vs_space = 0; | |
3665 | vd->vdev_stat.vs_dspace = 0; | |
3666 | vd->vdev_stat.vs_alloc = 0; | |
3667 | mutex_exit(&vd->vdev_stat_lock); | |
3668 | } | |
3669 | ||
428870ff BB |
3670 | void |
3671 | vdev_scan_stat_init(vdev_t *vd) | |
3672 | { | |
3673 | vdev_stat_t *vs = &vd->vdev_stat; | |
3674 | ||
1c27024e | 3675 | for (int c = 0; c < vd->vdev_children; c++) |
428870ff BB |
3676 | vdev_scan_stat_init(vd->vdev_child[c]); |
3677 | ||
3678 | mutex_enter(&vd->vdev_stat_lock); | |
3679 | vs->vs_scan_processed = 0; | |
3680 | mutex_exit(&vd->vdev_stat_lock); | |
3681 | } | |
3682 | ||
34dc7c2f | 3683 | void |
b128c09f | 3684 | vdev_stat_update(zio_t *zio, uint64_t psize) |
34dc7c2f | 3685 | { |
fb5f0bc8 BB |
3686 | spa_t *spa = zio->io_spa; |
3687 | vdev_t *rvd = spa->spa_root_vdev; | |
b128c09f | 3688 | vdev_t *vd = zio->io_vd ? zio->io_vd : rvd; |
34dc7c2f BB |
3689 | vdev_t *pvd; |
3690 | uint64_t txg = zio->io_txg; | |
3691 | vdev_stat_t *vs = &vd->vdev_stat; | |
193a37cb | 3692 | vdev_stat_ex_t *vsx = &vd->vdev_stat_ex; |
34dc7c2f BB |
3693 | zio_type_t type = zio->io_type; |
3694 | int flags = zio->io_flags; | |
3695 | ||
b128c09f BB |
3696 | /* |
3697 | * If this i/o is a gang leader, it didn't do any actual work. | |
3698 | */ | |
3699 | if (zio->io_gang_tree) | |
3700 | return; | |
3701 | ||
34dc7c2f | 3702 | if (zio->io_error == 0) { |
b128c09f BB |
3703 | /* |
3704 | * If this is a root i/o, don't count it -- we've already | |
3705 | * counted the top-level vdevs, and vdev_get_stats() will | |
3706 | * aggregate them when asked. This reduces contention on | |
3707 | * the root vdev_stat_lock and implicitly handles blocks | |
3708 | * that compress away to holes, for which there is no i/o. | |
3709 | * (Holes never create vdev children, so all the counters | |
3710 | * remain zero, which is what we want.) | |
3711 | * | |
3712 | * Note: this only applies to successful i/o (io_error == 0) | |
3713 | * because unlike i/o counts, errors are not additive. | |
3714 | * When reading a ditto block, for example, failure of | |
3715 | * one top-level vdev does not imply a root-level error. | |
3716 | */ | |
3717 | if (vd == rvd) | |
3718 | return; | |
3719 | ||
3720 | ASSERT(vd == zio->io_vd); | |
fb5f0bc8 BB |
3721 | |
3722 | if (flags & ZIO_FLAG_IO_BYPASS) | |
3723 | return; | |
3724 | ||
3725 | mutex_enter(&vd->vdev_stat_lock); | |
3726 | ||
b128c09f | 3727 | if (flags & ZIO_FLAG_IO_REPAIR) { |
572e2857 | 3728 | if (flags & ZIO_FLAG_SCAN_THREAD) { |
428870ff BB |
3729 | dsl_scan_phys_t *scn_phys = |
3730 | &spa->spa_dsl_pool->dp_scan->scn_phys; | |
3731 | uint64_t *processed = &scn_phys->scn_processed; | |
3732 | ||
3733 | /* XXX cleanup? */ | |
3734 | if (vd->vdev_ops->vdev_op_leaf) | |
3735 | atomic_add_64(processed, psize); | |
3736 | vs->vs_scan_processed += psize; | |
3737 | } | |
3738 | ||
fb5f0bc8 | 3739 | if (flags & ZIO_FLAG_SELF_HEAL) |
b128c09f | 3740 | vs->vs_self_healed += psize; |
34dc7c2f | 3741 | } |
fb5f0bc8 | 3742 | |
193a37cb TH |
3743 | /* |
3744 | * The bytes/ops/histograms are recorded at the leaf level and | |
3745 | * aggregated into the higher level vdevs in vdev_get_stats(). | |
3746 | */ | |
4eb0db42 TH |
3747 | if (vd->vdev_ops->vdev_op_leaf && |
3748 | (zio->io_priority < ZIO_PRIORITY_NUM_QUEUEABLE)) { | |
193a37cb TH |
3749 | |
3750 | vs->vs_ops[type]++; | |
3751 | vs->vs_bytes[type] += psize; | |
3752 | ||
7e945072 TH |
3753 | if (flags & ZIO_FLAG_DELEGATED) { |
3754 | vsx->vsx_agg_histo[zio->io_priority] | |
3755 | [RQ_HISTO(zio->io_size)]++; | |
3756 | } else { | |
3757 | vsx->vsx_ind_histo[zio->io_priority] | |
3758 | [RQ_HISTO(zio->io_size)]++; | |
3759 | } | |
3760 | ||
193a37cb TH |
3761 | if (zio->io_delta && zio->io_delay) { |
3762 | vsx->vsx_queue_histo[zio->io_priority] | |
7e945072 | 3763 | [L_HISTO(zio->io_delta - zio->io_delay)]++; |
193a37cb | 3764 | vsx->vsx_disk_histo[type] |
7e945072 | 3765 | [L_HISTO(zio->io_delay)]++; |
193a37cb | 3766 | vsx->vsx_total_histo[type] |
7e945072 | 3767 | [L_HISTO(zio->io_delta)]++; |
193a37cb TH |
3768 | } |
3769 | } | |
fb5f0bc8 BB |
3770 | |
3771 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f BB |
3772 | return; |
3773 | } | |
3774 | ||
3775 | if (flags & ZIO_FLAG_SPECULATIVE) | |
3776 | return; | |
3777 | ||
9babb374 BB |
3778 | /* |
3779 | * If this is an I/O error that is going to be retried, then ignore the | |
3780 | * error. Otherwise, the user may interpret B_FAILFAST I/O errors as | |
3781 | * hard errors, when in reality they can happen for any number of | |
3782 | * innocuous reasons (bus resets, MPxIO link failure, etc). | |
3783 | */ | |
3784 | if (zio->io_error == EIO && | |
3785 | !(zio->io_flags & ZIO_FLAG_IO_RETRY)) | |
3786 | return; | |
3787 | ||
428870ff BB |
3788 | /* |
3789 | * Intent logs writes won't propagate their error to the root | |
3790 | * I/O so don't mark these types of failures as pool-level | |
3791 | * errors. | |
3792 | */ | |
3793 | if (zio->io_vd == NULL && (zio->io_flags & ZIO_FLAG_DONT_PROPAGATE)) | |
3794 | return; | |
3795 | ||
b128c09f | 3796 | mutex_enter(&vd->vdev_stat_lock); |
9babb374 | 3797 | if (type == ZIO_TYPE_READ && !vdev_is_dead(vd)) { |
b128c09f BB |
3798 | if (zio->io_error == ECKSUM) |
3799 | vs->vs_checksum_errors++; | |
3800 | else | |
3801 | vs->vs_read_errors++; | |
34dc7c2f | 3802 | } |
9babb374 | 3803 | if (type == ZIO_TYPE_WRITE && !vdev_is_dead(vd)) |
b128c09f BB |
3804 | vs->vs_write_errors++; |
3805 | mutex_exit(&vd->vdev_stat_lock); | |
34dc7c2f | 3806 | |
a1d477c2 MA |
3807 | if (spa->spa_load_state == SPA_LOAD_NONE && |
3808 | type == ZIO_TYPE_WRITE && txg != 0 && | |
fb5f0bc8 | 3809 | (!(flags & ZIO_FLAG_IO_REPAIR) || |
572e2857 | 3810 | (flags & ZIO_FLAG_SCAN_THREAD) || |
428870ff | 3811 | spa->spa_claiming)) { |
fb5f0bc8 | 3812 | /* |
428870ff BB |
3813 | * This is either a normal write (not a repair), or it's |
3814 | * a repair induced by the scrub thread, or it's a repair | |
3815 | * made by zil_claim() during spa_load() in the first txg. | |
3816 | * In the normal case, we commit the DTL change in the same | |
3817 | * txg as the block was born. In the scrub-induced repair | |
3818 | * case, we know that scrubs run in first-pass syncing context, | |
3819 | * so we commit the DTL change in spa_syncing_txg(spa). | |
3820 | * In the zil_claim() case, we commit in spa_first_txg(spa). | |
fb5f0bc8 BB |
3821 | * |
3822 | * We currently do not make DTL entries for failed spontaneous | |
3823 | * self-healing writes triggered by normal (non-scrubbing) | |
3824 | * reads, because we have no transactional context in which to | |
3825 | * do so -- and it's not clear that it'd be desirable anyway. | |
3826 | */ | |
3827 | if (vd->vdev_ops->vdev_op_leaf) { | |
3828 | uint64_t commit_txg = txg; | |
572e2857 | 3829 | if (flags & ZIO_FLAG_SCAN_THREAD) { |
fb5f0bc8 BB |
3830 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); |
3831 | ASSERT(spa_sync_pass(spa) == 1); | |
3832 | vdev_dtl_dirty(vd, DTL_SCRUB, txg, 1); | |
428870ff BB |
3833 | commit_txg = spa_syncing_txg(spa); |
3834 | } else if (spa->spa_claiming) { | |
3835 | ASSERT(flags & ZIO_FLAG_IO_REPAIR); | |
3836 | commit_txg = spa_first_txg(spa); | |
fb5f0bc8 | 3837 | } |
428870ff | 3838 | ASSERT(commit_txg >= spa_syncing_txg(spa)); |
fb5f0bc8 | 3839 | if (vdev_dtl_contains(vd, DTL_MISSING, txg, 1)) |
34dc7c2f | 3840 | return; |
fb5f0bc8 BB |
3841 | for (pvd = vd; pvd != rvd; pvd = pvd->vdev_parent) |
3842 | vdev_dtl_dirty(pvd, DTL_PARTIAL, txg, 1); | |
3843 | vdev_dirty(vd->vdev_top, VDD_DTL, vd, commit_txg); | |
34dc7c2f | 3844 | } |
fb5f0bc8 BB |
3845 | if (vd != rvd) |
3846 | vdev_dtl_dirty(vd, DTL_MISSING, txg, 1); | |
34dc7c2f BB |
3847 | } |
3848 | } | |
3849 | ||
34dc7c2f | 3850 | /* |
428870ff BB |
3851 | * Update the in-core space usage stats for this vdev, its metaslab class, |
3852 | * and the root vdev. | |
34dc7c2f BB |
3853 | */ |
3854 | void | |
428870ff BB |
3855 | vdev_space_update(vdev_t *vd, int64_t alloc_delta, int64_t defer_delta, |
3856 | int64_t space_delta) | |
34dc7c2f BB |
3857 | { |
3858 | int64_t dspace_delta = space_delta; | |
3859 | spa_t *spa = vd->vdev_spa; | |
3860 | vdev_t *rvd = spa->spa_root_vdev; | |
428870ff BB |
3861 | metaslab_group_t *mg = vd->vdev_mg; |
3862 | metaslab_class_t *mc = mg ? mg->mg_class : NULL; | |
34dc7c2f BB |
3863 | |
3864 | ASSERT(vd == vd->vdev_top); | |
3865 | ||
3866 | /* | |
3867 | * Apply the inverse of the psize-to-asize (ie. RAID-Z) space-expansion | |
3868 | * factor. We must calculate this here and not at the root vdev | |
3869 | * because the root vdev's psize-to-asize is simply the max of its | |
3870 | * childrens', thus not accurate enough for us. | |
3871 | */ | |
3872 | ASSERT((dspace_delta & (SPA_MINBLOCKSIZE-1)) == 0); | |
9babb374 | 3873 | ASSERT(vd->vdev_deflate_ratio != 0 || vd->vdev_isl2cache); |
34dc7c2f BB |
3874 | dspace_delta = (dspace_delta >> SPA_MINBLOCKSHIFT) * |
3875 | vd->vdev_deflate_ratio; | |
3876 | ||
3877 | mutex_enter(&vd->vdev_stat_lock); | |
34dc7c2f | 3878 | vd->vdev_stat.vs_alloc += alloc_delta; |
428870ff | 3879 | vd->vdev_stat.vs_space += space_delta; |
34dc7c2f BB |
3880 | vd->vdev_stat.vs_dspace += dspace_delta; |
3881 | mutex_exit(&vd->vdev_stat_lock); | |
3882 | ||
428870ff | 3883 | if (mc == spa_normal_class(spa)) { |
34dc7c2f | 3884 | mutex_enter(&rvd->vdev_stat_lock); |
34dc7c2f | 3885 | rvd->vdev_stat.vs_alloc += alloc_delta; |
428870ff | 3886 | rvd->vdev_stat.vs_space += space_delta; |
34dc7c2f BB |
3887 | rvd->vdev_stat.vs_dspace += dspace_delta; |
3888 | mutex_exit(&rvd->vdev_stat_lock); | |
3889 | } | |
428870ff BB |
3890 | |
3891 | if (mc != NULL) { | |
3892 | ASSERT(rvd == vd->vdev_parent); | |
3893 | ASSERT(vd->vdev_ms_count != 0); | |
3894 | ||
3895 | metaslab_class_space_update(mc, | |
3896 | alloc_delta, defer_delta, space_delta, dspace_delta); | |
3897 | } | |
34dc7c2f BB |
3898 | } |
3899 | ||
3900 | /* | |
3901 | * Mark a top-level vdev's config as dirty, placing it on the dirty list | |
3902 | * so that it will be written out next time the vdev configuration is synced. | |
3903 | * If the root vdev is specified (vdev_top == NULL), dirty all top-level vdevs. | |
3904 | */ | |
3905 | void | |
3906 | vdev_config_dirty(vdev_t *vd) | |
3907 | { | |
3908 | spa_t *spa = vd->vdev_spa; | |
3909 | vdev_t *rvd = spa->spa_root_vdev; | |
3910 | int c; | |
3911 | ||
572e2857 BB |
3912 | ASSERT(spa_writeable(spa)); |
3913 | ||
34dc7c2f | 3914 | /* |
9babb374 BB |
3915 | * If this is an aux vdev (as with l2cache and spare devices), then we |
3916 | * update the vdev config manually and set the sync flag. | |
b128c09f BB |
3917 | */ |
3918 | if (vd->vdev_aux != NULL) { | |
3919 | spa_aux_vdev_t *sav = vd->vdev_aux; | |
3920 | nvlist_t **aux; | |
3921 | uint_t naux; | |
3922 | ||
3923 | for (c = 0; c < sav->sav_count; c++) { | |
3924 | if (sav->sav_vdevs[c] == vd) | |
3925 | break; | |
3926 | } | |
3927 | ||
3928 | if (c == sav->sav_count) { | |
3929 | /* | |
3930 | * We're being removed. There's nothing more to do. | |
3931 | */ | |
3932 | ASSERT(sav->sav_sync == B_TRUE); | |
3933 | return; | |
3934 | } | |
3935 | ||
3936 | sav->sav_sync = B_TRUE; | |
3937 | ||
9babb374 BB |
3938 | if (nvlist_lookup_nvlist_array(sav->sav_config, |
3939 | ZPOOL_CONFIG_L2CACHE, &aux, &naux) != 0) { | |
3940 | VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, | |
3941 | ZPOOL_CONFIG_SPARES, &aux, &naux) == 0); | |
3942 | } | |
b128c09f BB |
3943 | |
3944 | ASSERT(c < naux); | |
3945 | ||
3946 | /* | |
3947 | * Setting the nvlist in the middle if the array is a little | |
3948 | * sketchy, but it will work. | |
3949 | */ | |
3950 | nvlist_free(aux[c]); | |
428870ff | 3951 | aux[c] = vdev_config_generate(spa, vd, B_TRUE, 0); |
b128c09f BB |
3952 | |
3953 | return; | |
3954 | } | |
3955 | ||
3956 | /* | |
3957 | * The dirty list is protected by the SCL_CONFIG lock. The caller | |
3958 | * must either hold SCL_CONFIG as writer, or must be the sync thread | |
3959 | * (which holds SCL_CONFIG as reader). There's only one sync thread, | |
34dc7c2f BB |
3960 | * so this is sufficient to ensure mutual exclusion. |
3961 | */ | |
b128c09f BB |
3962 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
3963 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
3964 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f BB |
3965 | |
3966 | if (vd == rvd) { | |
3967 | for (c = 0; c < rvd->vdev_children; c++) | |
3968 | vdev_config_dirty(rvd->vdev_child[c]); | |
3969 | } else { | |
3970 | ASSERT(vd == vd->vdev_top); | |
3971 | ||
428870ff | 3972 | if (!list_link_active(&vd->vdev_config_dirty_node) && |
a1d477c2 | 3973 | vdev_is_concrete(vd)) { |
b128c09f | 3974 | list_insert_head(&spa->spa_config_dirty_list, vd); |
a1d477c2 | 3975 | } |
34dc7c2f BB |
3976 | } |
3977 | } | |
3978 | ||
3979 | void | |
3980 | vdev_config_clean(vdev_t *vd) | |
3981 | { | |
3982 | spa_t *spa = vd->vdev_spa; | |
3983 | ||
b128c09f BB |
3984 | ASSERT(spa_config_held(spa, SCL_CONFIG, RW_WRITER) || |
3985 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
3986 | spa_config_held(spa, SCL_CONFIG, RW_READER))); | |
34dc7c2f | 3987 | |
b128c09f BB |
3988 | ASSERT(list_link_active(&vd->vdev_config_dirty_node)); |
3989 | list_remove(&spa->spa_config_dirty_list, vd); | |
34dc7c2f BB |
3990 | } |
3991 | ||
b128c09f BB |
3992 | /* |
3993 | * Mark a top-level vdev's state as dirty, so that the next pass of | |
3994 | * spa_sync() can convert this into vdev_config_dirty(). We distinguish | |
3995 | * the state changes from larger config changes because they require | |
3996 | * much less locking, and are often needed for administrative actions. | |
3997 | */ | |
3998 | void | |
3999 | vdev_state_dirty(vdev_t *vd) | |
4000 | { | |
4001 | spa_t *spa = vd->vdev_spa; | |
4002 | ||
572e2857 | 4003 | ASSERT(spa_writeable(spa)); |
b128c09f BB |
4004 | ASSERT(vd == vd->vdev_top); |
4005 | ||
4006 | /* | |
4007 | * The state list is protected by the SCL_STATE lock. The caller | |
4008 | * must either hold SCL_STATE as writer, or must be the sync thread | |
4009 | * (which holds SCL_STATE as reader). There's only one sync thread, | |
4010 | * so this is sufficient to ensure mutual exclusion. | |
4011 | */ | |
4012 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
4013 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
4014 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
4015 | ||
a1d477c2 MA |
4016 | if (!list_link_active(&vd->vdev_state_dirty_node) && |
4017 | vdev_is_concrete(vd)) | |
b128c09f BB |
4018 | list_insert_head(&spa->spa_state_dirty_list, vd); |
4019 | } | |
4020 | ||
4021 | void | |
4022 | vdev_state_clean(vdev_t *vd) | |
4023 | { | |
4024 | spa_t *spa = vd->vdev_spa; | |
4025 | ||
4026 | ASSERT(spa_config_held(spa, SCL_STATE, RW_WRITER) || | |
4027 | (dsl_pool_sync_context(spa_get_dsl(spa)) && | |
4028 | spa_config_held(spa, SCL_STATE, RW_READER))); | |
4029 | ||
4030 | ASSERT(list_link_active(&vd->vdev_state_dirty_node)); | |
4031 | list_remove(&spa->spa_state_dirty_list, vd); | |
4032 | } | |
4033 | ||
4034 | /* | |
4035 | * Propagate vdev state up from children to parent. | |
4036 | */ | |
34dc7c2f BB |
4037 | void |
4038 | vdev_propagate_state(vdev_t *vd) | |
4039 | { | |
fb5f0bc8 BB |
4040 | spa_t *spa = vd->vdev_spa; |
4041 | vdev_t *rvd = spa->spa_root_vdev; | |
34dc7c2f BB |
4042 | int degraded = 0, faulted = 0; |
4043 | int corrupted = 0; | |
34dc7c2f BB |
4044 | vdev_t *child; |
4045 | ||
4046 | if (vd->vdev_children > 0) { | |
1c27024e | 4047 | for (int c = 0; c < vd->vdev_children; c++) { |
34dc7c2f | 4048 | child = vd->vdev_child[c]; |
b128c09f | 4049 | |
428870ff | 4050 | /* |
a1d477c2 MA |
4051 | * Don't factor holes or indirect vdevs into the |
4052 | * decision. | |
428870ff | 4053 | */ |
a1d477c2 | 4054 | if (!vdev_is_concrete(child)) |
428870ff BB |
4055 | continue; |
4056 | ||
b128c09f | 4057 | if (!vdev_readable(child) || |
fb5f0bc8 | 4058 | (!vdev_writeable(child) && spa_writeable(spa))) { |
b128c09f BB |
4059 | /* |
4060 | * Root special: if there is a top-level log | |
4061 | * device, treat the root vdev as if it were | |
4062 | * degraded. | |
4063 | */ | |
4064 | if (child->vdev_islog && vd == rvd) | |
4065 | degraded++; | |
4066 | else | |
4067 | faulted++; | |
4068 | } else if (child->vdev_state <= VDEV_STATE_DEGRADED) { | |
34dc7c2f | 4069 | degraded++; |
b128c09f | 4070 | } |
34dc7c2f BB |
4071 | |
4072 | if (child->vdev_stat.vs_aux == VDEV_AUX_CORRUPT_DATA) | |
4073 | corrupted++; | |
4074 | } | |
4075 | ||
4076 | vd->vdev_ops->vdev_op_state_change(vd, faulted, degraded); | |
4077 | ||
4078 | /* | |
b128c09f | 4079 | * Root special: if there is a top-level vdev that cannot be |
34dc7c2f BB |
4080 | * opened due to corrupted metadata, then propagate the root |
4081 | * vdev's aux state as 'corrupt' rather than 'insufficient | |
4082 | * replicas'. | |
4083 | */ | |
4084 | if (corrupted && vd == rvd && | |
4085 | rvd->vdev_state == VDEV_STATE_CANT_OPEN) | |
4086 | vdev_set_state(rvd, B_FALSE, VDEV_STATE_CANT_OPEN, | |
4087 | VDEV_AUX_CORRUPT_DATA); | |
4088 | } | |
4089 | ||
b128c09f | 4090 | if (vd->vdev_parent) |
34dc7c2f BB |
4091 | vdev_propagate_state(vd->vdev_parent); |
4092 | } | |
4093 | ||
4094 | /* | |
4095 | * Set a vdev's state. If this is during an open, we don't update the parent | |
4096 | * state, because we're in the process of opening children depth-first. | |
4097 | * Otherwise, we propagate the change to the parent. | |
4098 | * | |
4099 | * If this routine places a device in a faulted state, an appropriate ereport is | |
4100 | * generated. | |
4101 | */ | |
4102 | void | |
4103 | vdev_set_state(vdev_t *vd, boolean_t isopen, vdev_state_t state, vdev_aux_t aux) | |
4104 | { | |
4105 | uint64_t save_state; | |
b128c09f | 4106 | spa_t *spa = vd->vdev_spa; |
34dc7c2f BB |
4107 | |
4108 | if (state == vd->vdev_state) { | |
976246fa DB |
4109 | /* |
4110 | * Since vdev_offline() code path is already in an offline | |
4111 | * state we can miss a statechange event to OFFLINE. Check | |
4112 | * the previous state to catch this condition. | |
4113 | */ | |
4114 | if (vd->vdev_ops->vdev_op_leaf && | |
4115 | (state == VDEV_STATE_OFFLINE) && | |
4116 | (vd->vdev_prevstate >= VDEV_STATE_FAULTED)) { | |
4117 | /* post an offline state change */ | |
4118 | zfs_post_state_change(spa, vd, vd->vdev_prevstate); | |
4119 | } | |
34dc7c2f BB |
4120 | vd->vdev_stat.vs_aux = aux; |
4121 | return; | |
4122 | } | |
4123 | ||
4124 | save_state = vd->vdev_state; | |
4125 | ||
4126 | vd->vdev_state = state; | |
4127 | vd->vdev_stat.vs_aux = aux; | |
4128 | ||
4129 | /* | |
4130 | * If we are setting the vdev state to anything but an open state, then | |
428870ff BB |
4131 | * always close the underlying device unless the device has requested |
4132 | * a delayed close (i.e. we're about to remove or fault the device). | |
4133 | * Otherwise, we keep accessible but invalid devices open forever. | |
4134 | * We don't call vdev_close() itself, because that implies some extra | |
4135 | * checks (offline, etc) that we don't want here. This is limited to | |
4136 | * leaf devices, because otherwise closing the device will affect other | |
4137 | * children. | |
34dc7c2f | 4138 | */ |
428870ff BB |
4139 | if (!vd->vdev_delayed_close && vdev_is_dead(vd) && |
4140 | vd->vdev_ops->vdev_op_leaf) | |
34dc7c2f BB |
4141 | vd->vdev_ops->vdev_op_close(vd); |
4142 | ||
4143 | if (vd->vdev_removed && | |
4144 | state == VDEV_STATE_CANT_OPEN && | |
4145 | (aux == VDEV_AUX_OPEN_FAILED || vd->vdev_checkremove)) { | |
4146 | /* | |
4147 | * If the previous state is set to VDEV_STATE_REMOVED, then this | |
4148 | * device was previously marked removed and someone attempted to | |
4149 | * reopen it. If this failed due to a nonexistent device, then | |
4150 | * keep the device in the REMOVED state. We also let this be if | |
4151 | * it is one of our special test online cases, which is only | |
4152 | * attempting to online the device and shouldn't generate an FMA | |
4153 | * fault. | |
4154 | */ | |
4155 | vd->vdev_state = VDEV_STATE_REMOVED; | |
4156 | vd->vdev_stat.vs_aux = VDEV_AUX_NONE; | |
4157 | } else if (state == VDEV_STATE_REMOVED) { | |
34dc7c2f BB |
4158 | vd->vdev_removed = B_TRUE; |
4159 | } else if (state == VDEV_STATE_CANT_OPEN) { | |
4160 | /* | |
572e2857 BB |
4161 | * If we fail to open a vdev during an import or recovery, we |
4162 | * mark it as "not available", which signifies that it was | |
4163 | * never there to begin with. Failure to open such a device | |
4164 | * is not considered an error. | |
34dc7c2f | 4165 | */ |
572e2857 BB |
4166 | if ((spa_load_state(spa) == SPA_LOAD_IMPORT || |
4167 | spa_load_state(spa) == SPA_LOAD_RECOVER) && | |
34dc7c2f BB |
4168 | vd->vdev_ops->vdev_op_leaf) |
4169 | vd->vdev_not_present = 1; | |
4170 | ||
4171 | /* | |
4172 | * Post the appropriate ereport. If the 'prevstate' field is | |
4173 | * set to something other than VDEV_STATE_UNKNOWN, it indicates | |
4174 | * that this is part of a vdev_reopen(). In this case, we don't | |
4175 | * want to post the ereport if the device was already in the | |
4176 | * CANT_OPEN state beforehand. | |
4177 | * | |
4178 | * If the 'checkremove' flag is set, then this is an attempt to | |
4179 | * online the device in response to an insertion event. If we | |
4180 | * hit this case, then we have detected an insertion event for a | |
4181 | * faulted or offline device that wasn't in the removed state. | |
4182 | * In this scenario, we don't post an ereport because we are | |
4183 | * about to replace the device, or attempt an online with | |
4184 | * vdev_forcefault, which will generate the fault for us. | |
4185 | */ | |
4186 | if ((vd->vdev_prevstate != state || vd->vdev_forcefault) && | |
4187 | !vd->vdev_not_present && !vd->vdev_checkremove && | |
b128c09f | 4188 | vd != spa->spa_root_vdev) { |
34dc7c2f BB |
4189 | const char *class; |
4190 | ||
4191 | switch (aux) { | |
4192 | case VDEV_AUX_OPEN_FAILED: | |
4193 | class = FM_EREPORT_ZFS_DEVICE_OPEN_FAILED; | |
4194 | break; | |
4195 | case VDEV_AUX_CORRUPT_DATA: | |
4196 | class = FM_EREPORT_ZFS_DEVICE_CORRUPT_DATA; | |
4197 | break; | |
4198 | case VDEV_AUX_NO_REPLICAS: | |
4199 | class = FM_EREPORT_ZFS_DEVICE_NO_REPLICAS; | |
4200 | break; | |
4201 | case VDEV_AUX_BAD_GUID_SUM: | |
4202 | class = FM_EREPORT_ZFS_DEVICE_BAD_GUID_SUM; | |
4203 | break; | |
4204 | case VDEV_AUX_TOO_SMALL: | |
4205 | class = FM_EREPORT_ZFS_DEVICE_TOO_SMALL; | |
4206 | break; | |
4207 | case VDEV_AUX_BAD_LABEL: | |
4208 | class = FM_EREPORT_ZFS_DEVICE_BAD_LABEL; | |
4209 | break; | |
ff61d1a4 | 4210 | case VDEV_AUX_BAD_ASHIFT: |
4211 | class = FM_EREPORT_ZFS_DEVICE_BAD_ASHIFT; | |
4212 | break; | |
34dc7c2f BB |
4213 | default: |
4214 | class = FM_EREPORT_ZFS_DEVICE_UNKNOWN; | |
4215 | } | |
4216 | ||
b5256303 TC |
4217 | zfs_ereport_post(class, spa, vd, NULL, NULL, |
4218 | save_state, 0); | |
34dc7c2f BB |
4219 | } |
4220 | ||
4221 | /* Erase any notion of persistent removed state */ | |
4222 | vd->vdev_removed = B_FALSE; | |
4223 | } else { | |
4224 | vd->vdev_removed = B_FALSE; | |
4225 | } | |
4226 | ||
d02ca379 DB |
4227 | /* |
4228 | * Notify ZED of any significant state-change on a leaf vdev. | |
4229 | * | |
d02ca379 | 4230 | */ |
6078881a TH |
4231 | if (vd->vdev_ops->vdev_op_leaf) { |
4232 | /* preserve original state from a vdev_reopen() */ | |
4233 | if ((vd->vdev_prevstate != VDEV_STATE_UNKNOWN) && | |
4234 | (vd->vdev_prevstate != vd->vdev_state) && | |
4235 | (save_state <= VDEV_STATE_CLOSED)) | |
4236 | save_state = vd->vdev_prevstate; | |
4237 | ||
4238 | /* filter out state change due to initial vdev_open */ | |
4239 | if (save_state > VDEV_STATE_CLOSED) | |
4240 | zfs_post_state_change(spa, vd, save_state); | |
d02ca379 DB |
4241 | } |
4242 | ||
9babb374 BB |
4243 | if (!isopen && vd->vdev_parent) |
4244 | vdev_propagate_state(vd->vdev_parent); | |
34dc7c2f | 4245 | } |
b128c09f | 4246 | |
6cb8e530 PZ |
4247 | boolean_t |
4248 | vdev_children_are_offline(vdev_t *vd) | |
4249 | { | |
4250 | ASSERT(!vd->vdev_ops->vdev_op_leaf); | |
4251 | ||
4252 | for (uint64_t i = 0; i < vd->vdev_children; i++) { | |
4253 | if (vd->vdev_child[i]->vdev_state != VDEV_STATE_OFFLINE) | |
4254 | return (B_FALSE); | |
4255 | } | |
4256 | ||
4257 | return (B_TRUE); | |
4258 | } | |
4259 | ||
b128c09f BB |
4260 | /* |
4261 | * Check the vdev configuration to ensure that it's capable of supporting | |
e550644f | 4262 | * a root pool. We do not support partial configuration. |
b128c09f BB |
4263 | */ |
4264 | boolean_t | |
4265 | vdev_is_bootable(vdev_t *vd) | |
4266 | { | |
b128c09f | 4267 | if (!vd->vdev_ops->vdev_op_leaf) { |
e550644f | 4268 | const char *vdev_type = vd->vdev_ops->vdev_op_type; |
b128c09f | 4269 | |
a1d477c2 MA |
4270 | if (strcmp(vdev_type, VDEV_TYPE_MISSING) == 0 || |
4271 | strcmp(vdev_type, VDEV_TYPE_INDIRECT) == 0) { | |
b128c09f | 4272 | return (B_FALSE); |
a1d477c2 | 4273 | } |
b128c09f BB |
4274 | } |
4275 | ||
e550644f | 4276 | for (int c = 0; c < vd->vdev_children; c++) { |
b128c09f BB |
4277 | if (!vdev_is_bootable(vd->vdev_child[c])) |
4278 | return (B_FALSE); | |
4279 | } | |
4280 | return (B_TRUE); | |
4281 | } | |
9babb374 | 4282 | |
a1d477c2 MA |
4283 | boolean_t |
4284 | vdev_is_concrete(vdev_t *vd) | |
4285 | { | |
4286 | vdev_ops_t *ops = vd->vdev_ops; | |
4287 | if (ops == &vdev_indirect_ops || ops == &vdev_hole_ops || | |
4288 | ops == &vdev_missing_ops || ops == &vdev_root_ops) { | |
4289 | return (B_FALSE); | |
4290 | } else { | |
4291 | return (B_TRUE); | |
4292 | } | |
4293 | } | |
4294 | ||
572e2857 BB |
4295 | /* |
4296 | * Determine if a log device has valid content. If the vdev was | |
4297 | * removed or faulted in the MOS config then we know that | |
4298 | * the content on the log device has already been written to the pool. | |
4299 | */ | |
4300 | boolean_t | |
4301 | vdev_log_state_valid(vdev_t *vd) | |
4302 | { | |
4303 | if (vd->vdev_ops->vdev_op_leaf && !vd->vdev_faulted && | |
4304 | !vd->vdev_removed) | |
4305 | return (B_TRUE); | |
4306 | ||
1c27024e | 4307 | for (int c = 0; c < vd->vdev_children; c++) |
572e2857 BB |
4308 | if (vdev_log_state_valid(vd->vdev_child[c])) |
4309 | return (B_TRUE); | |
4310 | ||
4311 | return (B_FALSE); | |
4312 | } | |
4313 | ||
9babb374 BB |
4314 | /* |
4315 | * Expand a vdev if possible. | |
4316 | */ | |
4317 | void | |
4318 | vdev_expand(vdev_t *vd, uint64_t txg) | |
4319 | { | |
4320 | ASSERT(vd->vdev_top == vd); | |
4321 | ASSERT(spa_config_held(vd->vdev_spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
7637ef8d | 4322 | ASSERT(vdev_is_concrete(vd)); |
9babb374 | 4323 | |
a1d477c2 MA |
4324 | vdev_set_deflate_ratio(vd); |
4325 | ||
7637ef8d | 4326 | if ((vd->vdev_asize >> vd->vdev_ms_shift) > vd->vdev_ms_count) { |
9babb374 BB |
4327 | VERIFY(vdev_metaslab_init(vd, txg) == 0); |
4328 | vdev_config_dirty(vd); | |
4329 | } | |
4330 | } | |
428870ff BB |
4331 | |
4332 | /* | |
4333 | * Split a vdev. | |
4334 | */ | |
4335 | void | |
4336 | vdev_split(vdev_t *vd) | |
4337 | { | |
4338 | vdev_t *cvd, *pvd = vd->vdev_parent; | |
4339 | ||
4340 | vdev_remove_child(pvd, vd); | |
4341 | vdev_compact_children(pvd); | |
4342 | ||
4343 | cvd = pvd->vdev_child[0]; | |
4344 | if (pvd->vdev_children == 1) { | |
4345 | vdev_remove_parent(cvd); | |
4346 | cvd->vdev_splitting = B_TRUE; | |
4347 | } | |
4348 | vdev_propagate_state(cvd); | |
4349 | } | |
c28b2279 | 4350 | |
cc92e9d0 | 4351 | void |
8fb1ede1 | 4352 | vdev_deadman(vdev_t *vd, char *tag) |
cc92e9d0 | 4353 | { |
1c27024e | 4354 | for (int c = 0; c < vd->vdev_children; c++) { |
cc92e9d0 GW |
4355 | vdev_t *cvd = vd->vdev_child[c]; |
4356 | ||
8fb1ede1 | 4357 | vdev_deadman(cvd, tag); |
cc92e9d0 GW |
4358 | } |
4359 | ||
4360 | if (vd->vdev_ops->vdev_op_leaf) { | |
4361 | vdev_queue_t *vq = &vd->vdev_queue; | |
4362 | ||
4363 | mutex_enter(&vq->vq_lock); | |
e8b96c60 | 4364 | if (avl_numnodes(&vq->vq_active_tree) > 0) { |
cc92e9d0 GW |
4365 | spa_t *spa = vd->vdev_spa; |
4366 | zio_t *fio; | |
4367 | uint64_t delta; | |
4368 | ||
8fb1ede1 BB |
4369 | zfs_dbgmsg("slow vdev: %s has %d active IOs", |
4370 | vd->vdev_path, avl_numnodes(&vq->vq_active_tree)); | |
4371 | ||
cc92e9d0 GW |
4372 | /* |
4373 | * Look at the head of all the pending queues, | |
4374 | * if any I/O has been outstanding for longer than | |
8fb1ede1 | 4375 | * the spa_deadman_synctime invoke the deadman logic. |
cc92e9d0 | 4376 | */ |
e8b96c60 | 4377 | fio = avl_first(&vq->vq_active_tree); |
cb682a17 | 4378 | delta = gethrtime() - fio->io_timestamp; |
8fb1ede1 BB |
4379 | if (delta > spa_deadman_synctime(spa)) |
4380 | zio_deadman(fio, tag); | |
cc92e9d0 GW |
4381 | } |
4382 | mutex_exit(&vq->vq_lock); | |
4383 | } | |
4384 | } | |
4385 | ||
93ce2b4c | 4386 | #if defined(_KERNEL) |
c28b2279 BB |
4387 | EXPORT_SYMBOL(vdev_fault); |
4388 | EXPORT_SYMBOL(vdev_degrade); | |
4389 | EXPORT_SYMBOL(vdev_online); | |
4390 | EXPORT_SYMBOL(vdev_offline); | |
4391 | EXPORT_SYMBOL(vdev_clear); | |
4ea3f864 | 4392 | /* BEGIN CSTYLED */ |
d2734cce SD |
4393 | module_param(vdev_max_ms_count, int, 0644); |
4394 | MODULE_PARM_DESC(vdev_max_ms_count, | |
b8bcca18 MA |
4395 | "Divide added vdev into approximately (but no more than) this number " |
4396 | "of metaslabs"); | |
80d52c39 | 4397 | |
d2734cce SD |
4398 | module_param(vdev_min_ms_count, int, 0644); |
4399 | MODULE_PARM_DESC(vdev_min_ms_count, | |
4400 | "Minimum number of metaslabs per top-level vdev"); | |
4401 | ||
80d52c39 TH |
4402 | module_param(zfs_delays_per_second, uint, 0644); |
4403 | MODULE_PARM_DESC(zfs_delays_per_second, "Rate limit delay events to this many " | |
4404 | "IO delays per second"); | |
4405 | ||
4406 | module_param(zfs_checksums_per_second, uint, 0644); | |
4407 | MODULE_PARM_DESC(zfs_checksums_per_second, "Rate limit checksum events " | |
4408 | "to this many checksum errors per second (do not set below zed" | |
4409 | "threshold)."); | |
02638a30 TC |
4410 | |
4411 | module_param(zfs_scan_ignore_errors, int, 0644); | |
4412 | MODULE_PARM_DESC(zfs_scan_ignore_errors, | |
4413 | "Ignore errors during resilver/scrub"); | |
6cb8e530 PZ |
4414 | |
4415 | module_param(vdev_validate_skip, int, 0644); | |
4416 | MODULE_PARM_DESC(vdev_validate_skip, | |
4417 | "Bypass vdev_validate()"); | |
4ea3f864 | 4418 | /* END CSTYLED */ |
c28b2279 | 4419 | #endif |