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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 | */ | |
9ae529ec | 21 | |
34dc7c2f | 22 | /* |
428870ff | 23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
108a454a | 24 | * Copyright (c) 2012, 2020 by Delphix. All rights reserved. |
cc99f275 | 25 | * Copyright (c) 2017, Intel Corporation. |
34dc7c2f BB |
26 | */ |
27 | ||
34dc7c2f BB |
28 | /* |
29 | * Virtual Device Labels | |
30 | * --------------------- | |
31 | * | |
32 | * The vdev label serves several distinct purposes: | |
33 | * | |
34 | * 1. Uniquely identify this device as part of a ZFS pool and confirm its | |
35 | * identity within the pool. | |
36 | * | |
0dc2f70c | 37 | * 2. Verify that all the devices given in a configuration are present |
34dc7c2f BB |
38 | * within the pool. |
39 | * | |
0dc2f70c | 40 | * 3. Determine the uberblock for the pool. |
34dc7c2f | 41 | * |
0dc2f70c | 42 | * 4. In case of an import operation, determine the configuration of the |
34dc7c2f BB |
43 | * toplevel vdev of which it is a part. |
44 | * | |
0dc2f70c | 45 | * 5. If an import operation cannot find all the devices in the pool, |
34dc7c2f BB |
46 | * provide enough information to the administrator to determine which |
47 | * devices are missing. | |
48 | * | |
49 | * It is important to note that while the kernel is responsible for writing the | |
50 | * label, it only consumes the information in the first three cases. The | |
51 | * latter information is only consumed in userland when determining the | |
52 | * configuration to import a pool. | |
53 | * | |
54 | * | |
55 | * Label Organization | |
56 | * ------------------ | |
57 | * | |
58 | * Before describing the contents of the label, it's important to understand how | |
59 | * the labels are written and updated with respect to the uberblock. | |
60 | * | |
61 | * When the pool configuration is altered, either because it was newly created | |
62 | * or a device was added, we want to update all the labels such that we can deal | |
63 | * with fatal failure at any point. To this end, each disk has two labels which | |
64 | * are updated before and after the uberblock is synced. Assuming we have | |
65 | * labels and an uberblock with the following transaction groups: | |
66 | * | |
67 | * L1 UB L2 | |
68 | * +------+ +------+ +------+ | |
69 | * | | | | | | | |
70 | * | t10 | | t10 | | t10 | | |
71 | * | | | | | | | |
72 | * +------+ +------+ +------+ | |
73 | * | |
74 | * In this stable state, the labels and the uberblock were all updated within | |
75 | * the same transaction group (10). Each label is mirrored and checksummed, so | |
76 | * that we can detect when we fail partway through writing the label. | |
77 | * | |
78 | * In order to identify which labels are valid, the labels are written in the | |
79 | * following manner: | |
80 | * | |
0dc2f70c MA |
81 | * 1. For each vdev, update 'L1' to the new label |
82 | * 2. Update the uberblock | |
83 | * 3. For each vdev, update 'L2' to the new label | |
34dc7c2f BB |
84 | * |
85 | * Given arbitrary failure, we can determine the correct label to use based on | |
86 | * the transaction group. If we fail after updating L1 but before updating the | |
87 | * UB, we will notice that L1's transaction group is greater than the uberblock, | |
88 | * so L2 must be valid. If we fail after writing the uberblock but before | |
89 | * writing L2, we will notice that L2's transaction group is less than L1, and | |
90 | * therefore L1 is valid. | |
91 | * | |
92 | * Another added complexity is that not every label is updated when the config | |
93 | * is synced. If we add a single device, we do not want to have to re-write | |
94 | * every label for every device in the pool. This means that both L1 and L2 may | |
95 | * be older than the pool uberblock, because the necessary information is stored | |
96 | * on another vdev. | |
97 | * | |
98 | * | |
99 | * On-disk Format | |
100 | * -------------- | |
101 | * | |
102 | * The vdev label consists of two distinct parts, and is wrapped within the | |
103 | * vdev_label_t structure. The label includes 8k of padding to permit legacy | |
104 | * VTOC disk labels, but is otherwise ignored. | |
105 | * | |
106 | * The first half of the label is a packed nvlist which contains pool wide | |
107 | * properties, per-vdev properties, and configuration information. It is | |
108 | * described in more detail below. | |
109 | * | |
110 | * The latter half of the label consists of a redundant array of uberblocks. | |
111 | * These uberblocks are updated whenever a transaction group is committed, | |
112 | * or when the configuration is updated. When a pool is loaded, we scan each | |
113 | * vdev for the 'best' uberblock. | |
114 | * | |
115 | * | |
116 | * Configuration Information | |
117 | * ------------------------- | |
118 | * | |
119 | * The nvlist describing the pool and vdev contains the following elements: | |
120 | * | |
0dc2f70c MA |
121 | * version ZFS on-disk version |
122 | * name Pool name | |
123 | * state Pool state | |
124 | * txg Transaction group in which this label was written | |
125 | * pool_guid Unique identifier for this pool | |
126 | * vdev_tree An nvlist describing vdev tree. | |
9ae529ec CS |
127 | * features_for_read |
128 | * An nvlist of the features necessary for reading the MOS. | |
34dc7c2f BB |
129 | * |
130 | * Each leaf device label also contains the following: | |
131 | * | |
0dc2f70c MA |
132 | * top_guid Unique ID for top-level vdev in which this is contained |
133 | * guid Unique ID for the leaf vdev | |
34dc7c2f BB |
134 | * |
135 | * The 'vs' configuration follows the format described in 'spa_config.c'. | |
136 | */ | |
137 | ||
138 | #include <sys/zfs_context.h> | |
139 | #include <sys/spa.h> | |
140 | #include <sys/spa_impl.h> | |
141 | #include <sys/dmu.h> | |
142 | #include <sys/zap.h> | |
143 | #include <sys/vdev.h> | |
144 | #include <sys/vdev_impl.h> | |
145 | #include <sys/uberblock_impl.h> | |
146 | #include <sys/metaslab.h> | |
a1d477c2 | 147 | #include <sys/metaslab_impl.h> |
34dc7c2f | 148 | #include <sys/zio.h> |
428870ff | 149 | #include <sys/dsl_scan.h> |
a6255b7f | 150 | #include <sys/abd.h> |
34dc7c2f BB |
151 | #include <sys/fs/zfs.h> |
152 | ||
153 | /* | |
154 | * Basic routines to read and write from a vdev label. | |
155 | * Used throughout the rest of this file. | |
156 | */ | |
157 | uint64_t | |
158 | vdev_label_offset(uint64_t psize, int l, uint64_t offset) | |
159 | { | |
160 | ASSERT(offset < sizeof (vdev_label_t)); | |
161 | ASSERT(P2PHASE_TYPED(psize, sizeof (vdev_label_t), uint64_t) == 0); | |
162 | ||
163 | return (offset + l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ? | |
164 | 0 : psize - VDEV_LABELS * sizeof (vdev_label_t))); | |
165 | } | |
166 | ||
b128c09f BB |
167 | /* |
168 | * Returns back the vdev label associated with the passed in offset. | |
169 | */ | |
170 | int | |
171 | vdev_label_number(uint64_t psize, uint64_t offset) | |
172 | { | |
173 | int l; | |
174 | ||
175 | if (offset >= psize - VDEV_LABEL_END_SIZE) { | |
176 | offset -= psize - VDEV_LABEL_END_SIZE; | |
177 | offset += (VDEV_LABELS / 2) * sizeof (vdev_label_t); | |
178 | } | |
179 | l = offset / sizeof (vdev_label_t); | |
180 | return (l < VDEV_LABELS ? l : -1); | |
181 | } | |
182 | ||
34dc7c2f | 183 | static void |
a6255b7f | 184 | vdev_label_read(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t offset, |
e9aa730c | 185 | uint64_t size, zio_done_func_t *done, void *private, int flags) |
34dc7c2f | 186 | { |
0091d66f OF |
187 | ASSERT( |
188 | spa_config_held(zio->io_spa, SCL_STATE, RW_READER) == SCL_STATE || | |
189 | spa_config_held(zio->io_spa, SCL_STATE, RW_WRITER) == SCL_STATE); | |
b128c09f | 190 | ASSERT(flags & ZIO_FLAG_CONFIG_WRITER); |
34dc7c2f BB |
191 | |
192 | zio_nowait(zio_read_phys(zio, vd, | |
193 | vdev_label_offset(vd->vdev_psize, l, offset), | |
194 | size, buf, ZIO_CHECKSUM_LABEL, done, private, | |
b128c09f | 195 | ZIO_PRIORITY_SYNC_READ, flags, B_TRUE)); |
34dc7c2f BB |
196 | } |
197 | ||
379ca9cf | 198 | void |
a6255b7f | 199 | vdev_label_write(zio_t *zio, vdev_t *vd, int l, abd_t *buf, uint64_t offset, |
e9aa730c | 200 | uint64_t size, zio_done_func_t *done, void *private, int flags) |
34dc7c2f | 201 | { |
0091d66f OF |
202 | ASSERT( |
203 | spa_config_held(zio->io_spa, SCL_STATE, RW_READER) == SCL_STATE || | |
204 | spa_config_held(zio->io_spa, SCL_STATE, RW_WRITER) == SCL_STATE); | |
b128c09f | 205 | ASSERT(flags & ZIO_FLAG_CONFIG_WRITER); |
34dc7c2f BB |
206 | |
207 | zio_nowait(zio_write_phys(zio, vd, | |
208 | vdev_label_offset(vd->vdev_psize, l, offset), | |
209 | size, buf, ZIO_CHECKSUM_LABEL, done, private, | |
210 | ZIO_PRIORITY_SYNC_WRITE, flags, B_TRUE)); | |
211 | } | |
212 | ||
193a37cb TH |
213 | /* |
214 | * Generate the nvlist representing this vdev's stats | |
215 | */ | |
216 | void | |
217 | vdev_config_generate_stats(vdev_t *vd, nvlist_t *nv) | |
218 | { | |
219 | nvlist_t *nvx; | |
220 | vdev_stat_t *vs; | |
221 | vdev_stat_ex_t *vsx; | |
222 | ||
223 | vs = kmem_alloc(sizeof (*vs), KM_SLEEP); | |
224 | vsx = kmem_alloc(sizeof (*vsx), KM_SLEEP); | |
225 | ||
226 | vdev_get_stats_ex(vd, vs, vsx); | |
227 | fnvlist_add_uint64_array(nv, ZPOOL_CONFIG_VDEV_STATS, | |
228 | (uint64_t *)vs, sizeof (*vs) / sizeof (uint64_t)); | |
229 | ||
193a37cb TH |
230 | /* |
231 | * Add extended stats into a special extended stats nvlist. This keeps | |
232 | * all the extended stats nicely grouped together. The extended stats | |
233 | * nvlist is then added to the main nvlist. | |
234 | */ | |
235 | nvx = fnvlist_alloc(); | |
236 | ||
237 | /* ZIOs in flight to disk */ | |
238 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE, | |
239 | vsx->vsx_active_queue[ZIO_PRIORITY_SYNC_READ]); | |
240 | ||
241 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE, | |
242 | vsx->vsx_active_queue[ZIO_PRIORITY_SYNC_WRITE]); | |
243 | ||
244 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE, | |
245 | vsx->vsx_active_queue[ZIO_PRIORITY_ASYNC_READ]); | |
246 | ||
247 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE, | |
248 | vsx->vsx_active_queue[ZIO_PRIORITY_ASYNC_WRITE]); | |
249 | ||
250 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE, | |
251 | vsx->vsx_active_queue[ZIO_PRIORITY_SCRUB]); | |
252 | ||
1b939560 BB |
253 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_TRIM_ACTIVE_QUEUE, |
254 | vsx->vsx_active_queue[ZIO_PRIORITY_TRIM]); | |
255 | ||
193a37cb TH |
256 | /* ZIOs pending */ |
257 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE, | |
258 | vsx->vsx_pend_queue[ZIO_PRIORITY_SYNC_READ]); | |
259 | ||
260 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE, | |
261 | vsx->vsx_pend_queue[ZIO_PRIORITY_SYNC_WRITE]); | |
262 | ||
263 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE, | |
264 | vsx->vsx_pend_queue[ZIO_PRIORITY_ASYNC_READ]); | |
265 | ||
266 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE, | |
267 | vsx->vsx_pend_queue[ZIO_PRIORITY_ASYNC_WRITE]); | |
268 | ||
269 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE, | |
270 | vsx->vsx_pend_queue[ZIO_PRIORITY_SCRUB]); | |
271 | ||
1b939560 BB |
272 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_TRIM_PEND_QUEUE, |
273 | vsx->vsx_pend_queue[ZIO_PRIORITY_TRIM]); | |
274 | ||
193a37cb TH |
275 | /* Histograms */ |
276 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO, | |
277 | vsx->vsx_total_histo[ZIO_TYPE_READ], | |
278 | ARRAY_SIZE(vsx->vsx_total_histo[ZIO_TYPE_READ])); | |
279 | ||
280 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO, | |
281 | vsx->vsx_total_histo[ZIO_TYPE_WRITE], | |
282 | ARRAY_SIZE(vsx->vsx_total_histo[ZIO_TYPE_WRITE])); | |
283 | ||
284 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO, | |
285 | vsx->vsx_disk_histo[ZIO_TYPE_READ], | |
286 | ARRAY_SIZE(vsx->vsx_disk_histo[ZIO_TYPE_READ])); | |
287 | ||
288 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO, | |
289 | vsx->vsx_disk_histo[ZIO_TYPE_WRITE], | |
290 | ARRAY_SIZE(vsx->vsx_disk_histo[ZIO_TYPE_WRITE])); | |
291 | ||
292 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO, | |
293 | vsx->vsx_queue_histo[ZIO_PRIORITY_SYNC_READ], | |
294 | ARRAY_SIZE(vsx->vsx_queue_histo[ZIO_PRIORITY_SYNC_READ])); | |
295 | ||
296 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO, | |
297 | vsx->vsx_queue_histo[ZIO_PRIORITY_SYNC_WRITE], | |
298 | ARRAY_SIZE(vsx->vsx_queue_histo[ZIO_PRIORITY_SYNC_WRITE])); | |
299 | ||
300 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO, | |
301 | vsx->vsx_queue_histo[ZIO_PRIORITY_ASYNC_READ], | |
302 | ARRAY_SIZE(vsx->vsx_queue_histo[ZIO_PRIORITY_ASYNC_READ])); | |
303 | ||
304 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO, | |
305 | vsx->vsx_queue_histo[ZIO_PRIORITY_ASYNC_WRITE], | |
306 | ARRAY_SIZE(vsx->vsx_queue_histo[ZIO_PRIORITY_ASYNC_WRITE])); | |
307 | ||
308 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO, | |
309 | vsx->vsx_queue_histo[ZIO_PRIORITY_SCRUB], | |
310 | ARRAY_SIZE(vsx->vsx_queue_histo[ZIO_PRIORITY_SCRUB])); | |
311 | ||
1b939560 BB |
312 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_TRIM_LAT_HISTO, |
313 | vsx->vsx_queue_histo[ZIO_PRIORITY_TRIM], | |
314 | ARRAY_SIZE(vsx->vsx_queue_histo[ZIO_PRIORITY_TRIM])); | |
315 | ||
7e945072 TH |
316 | /* Request sizes */ |
317 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO, | |
318 | vsx->vsx_ind_histo[ZIO_PRIORITY_SYNC_READ], | |
319 | ARRAY_SIZE(vsx->vsx_ind_histo[ZIO_PRIORITY_SYNC_READ])); | |
320 | ||
321 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO, | |
322 | vsx->vsx_ind_histo[ZIO_PRIORITY_SYNC_WRITE], | |
323 | ARRAY_SIZE(vsx->vsx_ind_histo[ZIO_PRIORITY_SYNC_WRITE])); | |
324 | ||
325 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO, | |
326 | vsx->vsx_ind_histo[ZIO_PRIORITY_ASYNC_READ], | |
327 | ARRAY_SIZE(vsx->vsx_ind_histo[ZIO_PRIORITY_ASYNC_READ])); | |
328 | ||
329 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO, | |
330 | vsx->vsx_ind_histo[ZIO_PRIORITY_ASYNC_WRITE], | |
331 | ARRAY_SIZE(vsx->vsx_ind_histo[ZIO_PRIORITY_ASYNC_WRITE])); | |
332 | ||
333 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO, | |
334 | vsx->vsx_ind_histo[ZIO_PRIORITY_SCRUB], | |
335 | ARRAY_SIZE(vsx->vsx_ind_histo[ZIO_PRIORITY_SCRUB])); | |
336 | ||
1b939560 BB |
337 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_IND_TRIM_HISTO, |
338 | vsx->vsx_ind_histo[ZIO_PRIORITY_TRIM], | |
339 | ARRAY_SIZE(vsx->vsx_ind_histo[ZIO_PRIORITY_TRIM])); | |
340 | ||
7e945072 TH |
341 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO, |
342 | vsx->vsx_agg_histo[ZIO_PRIORITY_SYNC_READ], | |
343 | ARRAY_SIZE(vsx->vsx_agg_histo[ZIO_PRIORITY_SYNC_READ])); | |
344 | ||
345 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO, | |
346 | vsx->vsx_agg_histo[ZIO_PRIORITY_SYNC_WRITE], | |
347 | ARRAY_SIZE(vsx->vsx_agg_histo[ZIO_PRIORITY_SYNC_WRITE])); | |
348 | ||
349 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO, | |
350 | vsx->vsx_agg_histo[ZIO_PRIORITY_ASYNC_READ], | |
351 | ARRAY_SIZE(vsx->vsx_agg_histo[ZIO_PRIORITY_ASYNC_READ])); | |
352 | ||
353 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO, | |
354 | vsx->vsx_agg_histo[ZIO_PRIORITY_ASYNC_WRITE], | |
355 | ARRAY_SIZE(vsx->vsx_agg_histo[ZIO_PRIORITY_ASYNC_WRITE])); | |
356 | ||
357 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO, | |
358 | vsx->vsx_agg_histo[ZIO_PRIORITY_SCRUB], | |
359 | ARRAY_SIZE(vsx->vsx_agg_histo[ZIO_PRIORITY_SCRUB])); | |
360 | ||
1b939560 BB |
361 | fnvlist_add_uint64_array(nvx, ZPOOL_CONFIG_VDEV_AGG_TRIM_HISTO, |
362 | vsx->vsx_agg_histo[ZIO_PRIORITY_TRIM], | |
363 | ARRAY_SIZE(vsx->vsx_agg_histo[ZIO_PRIORITY_TRIM])); | |
364 | ||
ad796b8a TH |
365 | /* IO delays */ |
366 | fnvlist_add_uint64(nvx, ZPOOL_CONFIG_VDEV_SLOW_IOS, vs->vs_slow_ios); | |
367 | ||
193a37cb TH |
368 | /* Add extended stats nvlist to main nvlist */ |
369 | fnvlist_add_nvlist(nv, ZPOOL_CONFIG_VDEV_STATS_EX, nvx); | |
370 | ||
6a796725 | 371 | fnvlist_free(nvx); |
c8fd652c | 372 | kmem_free(vs, sizeof (*vs)); |
193a37cb TH |
373 | kmem_free(vsx, sizeof (*vsx)); |
374 | } | |
375 | ||
d2734cce SD |
376 | static void |
377 | root_vdev_actions_getprogress(vdev_t *vd, nvlist_t *nvl) | |
378 | { | |
379 | spa_t *spa = vd->vdev_spa; | |
380 | ||
381 | if (vd != spa->spa_root_vdev) | |
382 | return; | |
383 | ||
384 | /* provide either current or previous scan information */ | |
385 | pool_scan_stat_t ps; | |
386 | if (spa_scan_get_stats(spa, &ps) == 0) { | |
387 | fnvlist_add_uint64_array(nvl, | |
388 | ZPOOL_CONFIG_SCAN_STATS, (uint64_t *)&ps, | |
389 | sizeof (pool_scan_stat_t) / sizeof (uint64_t)); | |
390 | } | |
391 | ||
392 | pool_removal_stat_t prs; | |
393 | if (spa_removal_get_stats(spa, &prs) == 0) { | |
394 | fnvlist_add_uint64_array(nvl, | |
395 | ZPOOL_CONFIG_REMOVAL_STATS, (uint64_t *)&prs, | |
396 | sizeof (prs) / sizeof (uint64_t)); | |
397 | } | |
398 | ||
399 | pool_checkpoint_stat_t pcs; | |
400 | if (spa_checkpoint_get_stats(spa, &pcs) == 0) { | |
401 | fnvlist_add_uint64_array(nvl, | |
402 | ZPOOL_CONFIG_CHECKPOINT_STATS, (uint64_t *)&pcs, | |
403 | sizeof (pcs) / sizeof (uint64_t)); | |
404 | } | |
405 | } | |
406 | ||
9a49d3f3 BB |
407 | static void |
408 | top_vdev_actions_getprogress(vdev_t *vd, nvlist_t *nvl) | |
409 | { | |
410 | if (vd == vd->vdev_top) { | |
411 | vdev_rebuild_stat_t vrs; | |
412 | if (vdev_rebuild_get_stats(vd, &vrs) == 0) { | |
413 | fnvlist_add_uint64_array(nvl, | |
414 | ZPOOL_CONFIG_REBUILD_STATS, (uint64_t *)&vrs, | |
415 | sizeof (vrs) / sizeof (uint64_t)); | |
416 | } | |
417 | } | |
418 | } | |
419 | ||
34dc7c2f BB |
420 | /* |
421 | * Generate the nvlist representing this vdev's config. | |
422 | */ | |
423 | nvlist_t * | |
424 | vdev_config_generate(spa_t *spa, vdev_t *vd, boolean_t getstats, | |
428870ff | 425 | vdev_config_flag_t flags) |
34dc7c2f BB |
426 | { |
427 | nvlist_t *nv = NULL; | |
a1d477c2 MA |
428 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; |
429 | ||
79c76d5b | 430 | nv = fnvlist_alloc(); |
34dc7c2f | 431 | |
5d1f7fb6 | 432 | fnvlist_add_string(nv, ZPOOL_CONFIG_TYPE, vd->vdev_ops->vdev_op_type); |
428870ff | 433 | if (!(flags & (VDEV_CONFIG_SPARE | VDEV_CONFIG_L2CACHE))) |
5d1f7fb6 GW |
434 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_ID, vd->vdev_id); |
435 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_GUID, vd->vdev_guid); | |
34dc7c2f BB |
436 | |
437 | if (vd->vdev_path != NULL) | |
5d1f7fb6 | 438 | fnvlist_add_string(nv, ZPOOL_CONFIG_PATH, vd->vdev_path); |
34dc7c2f BB |
439 | |
440 | if (vd->vdev_devid != NULL) | |
5d1f7fb6 | 441 | fnvlist_add_string(nv, ZPOOL_CONFIG_DEVID, vd->vdev_devid); |
34dc7c2f BB |
442 | |
443 | if (vd->vdev_physpath != NULL) | |
5d1f7fb6 GW |
444 | fnvlist_add_string(nv, ZPOOL_CONFIG_PHYS_PATH, |
445 | vd->vdev_physpath); | |
34dc7c2f | 446 | |
1bbd8770 TH |
447 | if (vd->vdev_enc_sysfs_path != NULL) |
448 | fnvlist_add_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, | |
449 | vd->vdev_enc_sysfs_path); | |
450 | ||
9babb374 | 451 | if (vd->vdev_fru != NULL) |
5d1f7fb6 | 452 | fnvlist_add_string(nv, ZPOOL_CONFIG_FRU, vd->vdev_fru); |
9babb374 | 453 | |
34dc7c2f BB |
454 | if (vd->vdev_nparity != 0) { |
455 | ASSERT(strcmp(vd->vdev_ops->vdev_op_type, | |
456 | VDEV_TYPE_RAIDZ) == 0); | |
457 | ||
458 | /* | |
459 | * Make sure someone hasn't managed to sneak a fancy new vdev | |
460 | * into a crufty old storage pool. | |
461 | */ | |
462 | ASSERT(vd->vdev_nparity == 1 || | |
45d1cae3 BB |
463 | (vd->vdev_nparity <= 2 && |
464 | spa_version(spa) >= SPA_VERSION_RAIDZ2) || | |
465 | (vd->vdev_nparity <= 3 && | |
466 | spa_version(spa) >= SPA_VERSION_RAIDZ3)); | |
34dc7c2f BB |
467 | |
468 | /* | |
469 | * Note that we'll add the nparity tag even on storage pools | |
470 | * that only support a single parity device -- older software | |
471 | * will just ignore it. | |
472 | */ | |
5d1f7fb6 | 473 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_NPARITY, vd->vdev_nparity); |
34dc7c2f BB |
474 | } |
475 | ||
476 | if (vd->vdev_wholedisk != -1ULL) | |
5d1f7fb6 GW |
477 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, |
478 | vd->vdev_wholedisk); | |
34dc7c2f | 479 | |
6cb8e530 | 480 | if (vd->vdev_not_present && !(flags & VDEV_CONFIG_MISSING)) |
5d1f7fb6 | 481 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_NOT_PRESENT, 1); |
34dc7c2f BB |
482 | |
483 | if (vd->vdev_isspare) | |
5d1f7fb6 | 484 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_IS_SPARE, 1); |
34dc7c2f | 485 | |
428870ff BB |
486 | if (!(flags & (VDEV_CONFIG_SPARE | VDEV_CONFIG_L2CACHE)) && |
487 | vd == vd->vdev_top) { | |
5d1f7fb6 GW |
488 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_METASLAB_ARRAY, |
489 | vd->vdev_ms_array); | |
490 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_METASLAB_SHIFT, | |
491 | vd->vdev_ms_shift); | |
492 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_ASHIFT, vd->vdev_ashift); | |
493 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_ASIZE, | |
494 | vd->vdev_asize); | |
495 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_IS_LOG, vd->vdev_islog); | |
a1d477c2 | 496 | if (vd->vdev_removing) { |
5d1f7fb6 GW |
497 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_REMOVING, |
498 | vd->vdev_removing); | |
a1d477c2 | 499 | } |
cc99f275 DB |
500 | |
501 | /* zpool command expects alloc class data */ | |
502 | if (getstats && vd->vdev_alloc_bias != VDEV_BIAS_NONE) { | |
503 | const char *bias = NULL; | |
504 | ||
505 | switch (vd->vdev_alloc_bias) { | |
506 | case VDEV_BIAS_LOG: | |
507 | bias = VDEV_ALLOC_BIAS_LOG; | |
508 | break; | |
509 | case VDEV_BIAS_SPECIAL: | |
510 | bias = VDEV_ALLOC_BIAS_SPECIAL; | |
511 | break; | |
512 | case VDEV_BIAS_DEDUP: | |
513 | bias = VDEV_ALLOC_BIAS_DEDUP; | |
514 | break; | |
515 | default: | |
516 | ASSERT3U(vd->vdev_alloc_bias, ==, | |
517 | VDEV_BIAS_NONE); | |
518 | } | |
519 | fnvlist_add_string(nv, ZPOOL_CONFIG_ALLOCATION_BIAS, | |
520 | bias); | |
521 | } | |
34dc7c2f BB |
522 | } |
523 | ||
93cf2076 | 524 | if (vd->vdev_dtl_sm != NULL) { |
5d1f7fb6 | 525 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_DTL, |
93cf2076 GW |
526 | space_map_object(vd->vdev_dtl_sm)); |
527 | } | |
34dc7c2f | 528 | |
a1d477c2 MA |
529 | if (vic->vic_mapping_object != 0) { |
530 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_INDIRECT_OBJECT, | |
531 | vic->vic_mapping_object); | |
532 | } | |
533 | ||
534 | if (vic->vic_births_object != 0) { | |
535 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_INDIRECT_BIRTHS, | |
536 | vic->vic_births_object); | |
537 | } | |
538 | ||
539 | if (vic->vic_prev_indirect_vdev != UINT64_MAX) { | |
540 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_PREV_INDIRECT_VDEV, | |
541 | vic->vic_prev_indirect_vdev); | |
542 | } | |
543 | ||
428870ff | 544 | if (vd->vdev_crtxg) |
5d1f7fb6 | 545 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_CREATE_TXG, vd->vdev_crtxg); |
428870ff | 546 | |
d48091de | 547 | if (vd->vdev_expansion_time) |
548 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_EXPANSION_TIME, | |
549 | vd->vdev_expansion_time); | |
550 | ||
e0ab3ab5 JS |
551 | if (flags & VDEV_CONFIG_MOS) { |
552 | if (vd->vdev_leaf_zap != 0) { | |
553 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
554 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_VDEV_LEAF_ZAP, | |
555 | vd->vdev_leaf_zap); | |
556 | } | |
557 | ||
558 | if (vd->vdev_top_zap != 0) { | |
559 | ASSERT(vd == vd->vdev_top); | |
560 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_VDEV_TOP_ZAP, | |
561 | vd->vdev_top_zap); | |
562 | } | |
80a91e74 TC |
563 | |
564 | if (vd->vdev_resilver_deferred) { | |
565 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
566 | ASSERT(spa->spa_resilver_deferred); | |
567 | fnvlist_add_boolean(nv, ZPOOL_CONFIG_RESILVER_DEFER); | |
568 | } | |
e0ab3ab5 JS |
569 | } |
570 | ||
34dc7c2f | 571 | if (getstats) { |
193a37cb | 572 | vdev_config_generate_stats(vd, nv); |
428870ff | 573 | |
d2734cce | 574 | root_vdev_actions_getprogress(vd, nv); |
9a49d3f3 | 575 | top_vdev_actions_getprogress(vd, nv); |
a1d477c2 MA |
576 | |
577 | /* | |
578 | * Note: this can be called from open context | |
579 | * (spa_get_stats()), so we need the rwlock to prevent | |
580 | * the mapping from being changed by condensing. | |
581 | */ | |
582 | rw_enter(&vd->vdev_indirect_rwlock, RW_READER); | |
583 | if (vd->vdev_indirect_mapping != NULL) { | |
584 | ASSERT(vd->vdev_indirect_births != NULL); | |
585 | vdev_indirect_mapping_t *vim = | |
586 | vd->vdev_indirect_mapping; | |
587 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_INDIRECT_SIZE, | |
588 | vdev_indirect_mapping_size(vim)); | |
589 | } | |
590 | rw_exit(&vd->vdev_indirect_rwlock); | |
591 | if (vd->vdev_mg != NULL && | |
592 | vd->vdev_mg->mg_fragmentation != ZFS_FRAG_INVALID) { | |
593 | /* | |
594 | * Compute approximately how much memory would be used | |
595 | * for the indirect mapping if this device were to | |
596 | * be removed. | |
597 | * | |
598 | * Note: If the frag metric is invalid, then not | |
599 | * enough metaslabs have been converted to have | |
600 | * histograms. | |
601 | */ | |
602 | uint64_t seg_count = 0; | |
0dc2f70c | 603 | uint64_t to_alloc = vd->vdev_stat.vs_alloc; |
a1d477c2 MA |
604 | |
605 | /* | |
606 | * There are the same number of allocated segments | |
607 | * as free segments, so we will have at least one | |
0dc2f70c MA |
608 | * entry per free segment. However, small free |
609 | * segments (smaller than vdev_removal_max_span) | |
610 | * will be combined with adjacent allocated segments | |
611 | * as a single mapping. | |
a1d477c2 MA |
612 | */ |
613 | for (int i = 0; i < RANGE_TREE_HISTOGRAM_SIZE; i++) { | |
0dc2f70c MA |
614 | if (1ULL << (i + 1) < vdev_removal_max_span) { |
615 | to_alloc += | |
616 | vd->vdev_mg->mg_histogram[i] << | |
617 | (i + 1); | |
618 | } else { | |
619 | seg_count += | |
620 | vd->vdev_mg->mg_histogram[i]; | |
621 | } | |
a1d477c2 MA |
622 | } |
623 | ||
624 | /* | |
0dc2f70c MA |
625 | * The maximum length of a mapping is |
626 | * zfs_remove_max_segment, so we need at least one entry | |
627 | * per zfs_remove_max_segment of allocated data. | |
a1d477c2 | 628 | */ |
53dce5ac | 629 | seg_count += to_alloc / spa_remove_max_segment(spa); |
a1d477c2 MA |
630 | |
631 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_INDIRECT_SIZE, | |
632 | seg_count * | |
633 | sizeof (vdev_indirect_mapping_entry_phys_t)); | |
634 | } | |
34dc7c2f BB |
635 | } |
636 | ||
637 | if (!vd->vdev_ops->vdev_op_leaf) { | |
638 | nvlist_t **child; | |
428870ff BB |
639 | int c, idx; |
640 | ||
641 | ASSERT(!vd->vdev_ishole); | |
34dc7c2f BB |
642 | |
643 | child = kmem_alloc(vd->vdev_children * sizeof (nvlist_t *), | |
79c76d5b | 644 | KM_SLEEP); |
34dc7c2f | 645 | |
428870ff BB |
646 | for (c = 0, idx = 0; c < vd->vdev_children; c++) { |
647 | vdev_t *cvd = vd->vdev_child[c]; | |
34dc7c2f | 648 | |
428870ff BB |
649 | /* |
650 | * If we're generating an nvlist of removing | |
651 | * vdevs then skip over any device which is | |
652 | * not being removed. | |
653 | */ | |
654 | if ((flags & VDEV_CONFIG_REMOVING) && | |
655 | !cvd->vdev_removing) | |
656 | continue; | |
34dc7c2f | 657 | |
428870ff BB |
658 | child[idx++] = vdev_config_generate(spa, cvd, |
659 | getstats, flags); | |
660 | } | |
661 | ||
662 | if (idx) { | |
5d1f7fb6 GW |
663 | fnvlist_add_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, |
664 | child, idx); | |
428870ff BB |
665 | } |
666 | ||
667 | for (c = 0; c < idx; c++) | |
34dc7c2f BB |
668 | nvlist_free(child[c]); |
669 | ||
670 | kmem_free(child, vd->vdev_children * sizeof (nvlist_t *)); | |
671 | ||
672 | } else { | |
428870ff BB |
673 | const char *aux = NULL; |
674 | ||
34dc7c2f | 675 | if (vd->vdev_offline && !vd->vdev_tmpoffline) |
5d1f7fb6 GW |
676 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_OFFLINE, B_TRUE); |
677 | if (vd->vdev_resilver_txg != 0) | |
678 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_RESILVER_TXG, | |
679 | vd->vdev_resilver_txg); | |
9a49d3f3 BB |
680 | if (vd->vdev_rebuild_txg != 0) |
681 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_REBUILD_TXG, | |
682 | vd->vdev_rebuild_txg); | |
34dc7c2f | 683 | if (vd->vdev_faulted) |
5d1f7fb6 | 684 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_FAULTED, B_TRUE); |
34dc7c2f | 685 | if (vd->vdev_degraded) |
5d1f7fb6 | 686 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_DEGRADED, B_TRUE); |
34dc7c2f | 687 | if (vd->vdev_removed) |
5d1f7fb6 | 688 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_REMOVED, B_TRUE); |
34dc7c2f | 689 | if (vd->vdev_unspare) |
5d1f7fb6 | 690 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_UNSPARE, B_TRUE); |
428870ff | 691 | if (vd->vdev_ishole) |
5d1f7fb6 | 692 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_IS_HOLE, B_TRUE); |
428870ff | 693 | |
4a283c7f | 694 | /* Set the reason why we're FAULTED/DEGRADED. */ |
428870ff BB |
695 | switch (vd->vdev_stat.vs_aux) { |
696 | case VDEV_AUX_ERR_EXCEEDED: | |
697 | aux = "err_exceeded"; | |
698 | break; | |
699 | ||
700 | case VDEV_AUX_EXTERNAL: | |
701 | aux = "external"; | |
702 | break; | |
703 | } | |
704 | ||
4a283c7f | 705 | if (aux != NULL && !vd->vdev_tmpoffline) { |
5d1f7fb6 | 706 | fnvlist_add_string(nv, ZPOOL_CONFIG_AUX_STATE, aux); |
4a283c7f TH |
707 | } else { |
708 | /* | |
709 | * We're healthy - clear any previous AUX_STATE values. | |
710 | */ | |
711 | if (nvlist_exists(nv, ZPOOL_CONFIG_AUX_STATE)) | |
712 | nvlist_remove_all(nv, ZPOOL_CONFIG_AUX_STATE); | |
713 | } | |
428870ff BB |
714 | |
715 | if (vd->vdev_splitting && vd->vdev_orig_guid != 0LL) { | |
5d1f7fb6 GW |
716 | fnvlist_add_uint64(nv, ZPOOL_CONFIG_ORIG_GUID, |
717 | vd->vdev_orig_guid); | |
428870ff | 718 | } |
34dc7c2f BB |
719 | } |
720 | ||
721 | return (nv); | |
722 | } | |
723 | ||
428870ff BB |
724 | /* |
725 | * Generate a view of the top-level vdevs. If we currently have holes | |
726 | * in the namespace, then generate an array which contains a list of holey | |
727 | * vdevs. Additionally, add the number of top-level children that currently | |
728 | * exist. | |
729 | */ | |
730 | void | |
731 | vdev_top_config_generate(spa_t *spa, nvlist_t *config) | |
732 | { | |
733 | vdev_t *rvd = spa->spa_root_vdev; | |
734 | uint64_t *array; | |
735 | uint_t c, idx; | |
736 | ||
79c76d5b | 737 | array = kmem_alloc(rvd->vdev_children * sizeof (uint64_t), KM_SLEEP); |
428870ff BB |
738 | |
739 | for (c = 0, idx = 0; c < rvd->vdev_children; c++) { | |
740 | vdev_t *tvd = rvd->vdev_child[c]; | |
741 | ||
a1d477c2 | 742 | if (tvd->vdev_ishole) { |
428870ff | 743 | array[idx++] = c; |
a1d477c2 | 744 | } |
428870ff BB |
745 | } |
746 | ||
747 | if (idx) { | |
748 | VERIFY(nvlist_add_uint64_array(config, ZPOOL_CONFIG_HOLE_ARRAY, | |
749 | array, idx) == 0); | |
750 | } | |
751 | ||
752 | VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, | |
753 | rvd->vdev_children) == 0); | |
754 | ||
755 | kmem_free(array, rvd->vdev_children * sizeof (uint64_t)); | |
756 | } | |
757 | ||
9ae529ec | 758 | /* |
3bc7e0fb GW |
759 | * Returns the configuration from the label of the given vdev. For vdevs |
760 | * which don't have a txg value stored on their label (i.e. spares/cache) | |
761 | * or have not been completely initialized (txg = 0) just return | |
762 | * the configuration from the first valid label we find. Otherwise, | |
763 | * find the most up-to-date label that does not exceed the specified | |
764 | * 'txg' value. | |
9ae529ec | 765 | */ |
34dc7c2f | 766 | nvlist_t * |
3bc7e0fb | 767 | vdev_label_read_config(vdev_t *vd, uint64_t txg) |
34dc7c2f BB |
768 | { |
769 | spa_t *spa = vd->vdev_spa; | |
770 | nvlist_t *config = NULL; | |
771 | vdev_phys_t *vp; | |
a6255b7f | 772 | abd_t *vp_abd; |
34dc7c2f | 773 | zio_t *zio; |
3bc7e0fb | 774 | uint64_t best_txg = 0; |
38a19edd | 775 | uint64_t label_txg = 0; |
3bc7e0fb | 776 | int error = 0; |
9babb374 BB |
777 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL | |
778 | ZIO_FLAG_SPECULATIVE; | |
34dc7c2f | 779 | |
b128c09f | 780 | ASSERT(spa_config_held(spa, SCL_STATE_ALL, RW_WRITER) == SCL_STATE_ALL); |
34dc7c2f BB |
781 | |
782 | if (!vdev_readable(vd)) | |
783 | return (NULL); | |
784 | ||
a6255b7f DQ |
785 | vp_abd = abd_alloc_linear(sizeof (vdev_phys_t), B_TRUE); |
786 | vp = abd_to_buf(vp_abd); | |
34dc7c2f | 787 | |
9babb374 | 788 | retry: |
1c27024e | 789 | for (int l = 0; l < VDEV_LABELS; l++) { |
3bc7e0fb | 790 | nvlist_t *label = NULL; |
34dc7c2f | 791 | |
b128c09f | 792 | zio = zio_root(spa, NULL, NULL, flags); |
34dc7c2f | 793 | |
a6255b7f | 794 | vdev_label_read(zio, vd, l, vp_abd, |
34dc7c2f | 795 | offsetof(vdev_label_t, vl_vdev_phys), |
b128c09f | 796 | sizeof (vdev_phys_t), NULL, NULL, flags); |
34dc7c2f BB |
797 | |
798 | if (zio_wait(zio) == 0 && | |
799 | nvlist_unpack(vp->vp_nvlist, sizeof (vp->vp_nvlist), | |
3bc7e0fb | 800 | &label, 0) == 0) { |
3bc7e0fb GW |
801 | /* |
802 | * Auxiliary vdevs won't have txg values in their | |
803 | * labels and newly added vdevs may not have been | |
804 | * completely initialized so just return the | |
805 | * configuration from the first valid label we | |
806 | * encounter. | |
807 | */ | |
808 | error = nvlist_lookup_uint64(label, | |
809 | ZPOOL_CONFIG_POOL_TXG, &label_txg); | |
810 | if ((error || label_txg == 0) && !config) { | |
811 | config = label; | |
812 | break; | |
813 | } else if (label_txg <= txg && label_txg > best_txg) { | |
814 | best_txg = label_txg; | |
815 | nvlist_free(config); | |
816 | config = fnvlist_dup(label); | |
817 | } | |
818 | } | |
34dc7c2f | 819 | |
3bc7e0fb GW |
820 | if (label != NULL) { |
821 | nvlist_free(label); | |
822 | label = NULL; | |
34dc7c2f BB |
823 | } |
824 | } | |
825 | ||
9babb374 BB |
826 | if (config == NULL && !(flags & ZIO_FLAG_TRYHARD)) { |
827 | flags |= ZIO_FLAG_TRYHARD; | |
828 | goto retry; | |
829 | } | |
830 | ||
38a19edd PZ |
831 | /* |
832 | * We found a valid label but it didn't pass txg restrictions. | |
833 | */ | |
834 | if (config == NULL && label_txg != 0) { | |
835 | vdev_dbgmsg(vd, "label discarded as txg is too large " | |
836 | "(%llu > %llu)", (u_longlong_t)label_txg, | |
837 | (u_longlong_t)txg); | |
838 | } | |
839 | ||
a6255b7f | 840 | abd_free(vp_abd); |
34dc7c2f BB |
841 | |
842 | return (config); | |
843 | } | |
844 | ||
845 | /* | |
846 | * Determine if a device is in use. The 'spare_guid' parameter will be filled | |
847 | * in with the device guid if this spare is active elsewhere on the system. | |
848 | */ | |
849 | static boolean_t | |
850 | vdev_inuse(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason, | |
851 | uint64_t *spare_guid, uint64_t *l2cache_guid) | |
852 | { | |
853 | spa_t *spa = vd->vdev_spa; | |
854 | uint64_t state, pool_guid, device_guid, txg, spare_pool; | |
855 | uint64_t vdtxg = 0; | |
856 | nvlist_t *label; | |
857 | ||
858 | if (spare_guid) | |
859 | *spare_guid = 0ULL; | |
860 | if (l2cache_guid) | |
861 | *l2cache_guid = 0ULL; | |
862 | ||
863 | /* | |
864 | * Read the label, if any, and perform some basic sanity checks. | |
865 | */ | |
3bc7e0fb | 866 | if ((label = vdev_label_read_config(vd, -1ULL)) == NULL) |
34dc7c2f BB |
867 | return (B_FALSE); |
868 | ||
869 | (void) nvlist_lookup_uint64(label, ZPOOL_CONFIG_CREATE_TXG, | |
870 | &vdtxg); | |
871 | ||
872 | if (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
873 | &state) != 0 || | |
874 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, | |
875 | &device_guid) != 0) { | |
876 | nvlist_free(label); | |
877 | return (B_FALSE); | |
878 | } | |
879 | ||
880 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
881 | (nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, | |
882 | &pool_guid) != 0 || | |
883 | nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, | |
884 | &txg) != 0)) { | |
885 | nvlist_free(label); | |
886 | return (B_FALSE); | |
887 | } | |
888 | ||
889 | nvlist_free(label); | |
890 | ||
891 | /* | |
892 | * Check to see if this device indeed belongs to the pool it claims to | |
893 | * be a part of. The only way this is allowed is if the device is a hot | |
894 | * spare (which we check for later on). | |
895 | */ | |
896 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
897 | !spa_guid_exists(pool_guid, device_guid) && | |
b128c09f | 898 | !spa_spare_exists(device_guid, NULL, NULL) && |
34dc7c2f BB |
899 | !spa_l2cache_exists(device_guid, NULL)) |
900 | return (B_FALSE); | |
901 | ||
902 | /* | |
903 | * If the transaction group is zero, then this an initialized (but | |
904 | * unused) label. This is only an error if the create transaction | |
905 | * on-disk is the same as the one we're using now, in which case the | |
906 | * user has attempted to add the same vdev multiple times in the same | |
907 | * transaction. | |
908 | */ | |
909 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && | |
910 | txg == 0 && vdtxg == crtxg) | |
911 | return (B_TRUE); | |
912 | ||
913 | /* | |
914 | * Check to see if this is a spare device. We do an explicit check for | |
915 | * spa_has_spare() here because it may be on our pending list of spares | |
916 | * to add. We also check if it is an l2cache device. | |
917 | */ | |
b128c09f | 918 | if (spa_spare_exists(device_guid, &spare_pool, NULL) || |
34dc7c2f BB |
919 | spa_has_spare(spa, device_guid)) { |
920 | if (spare_guid) | |
921 | *spare_guid = device_guid; | |
922 | ||
923 | switch (reason) { | |
924 | case VDEV_LABEL_CREATE: | |
925 | case VDEV_LABEL_L2CACHE: | |
926 | return (B_TRUE); | |
927 | ||
928 | case VDEV_LABEL_REPLACE: | |
929 | return (!spa_has_spare(spa, device_guid) || | |
930 | spare_pool != 0ULL); | |
931 | ||
932 | case VDEV_LABEL_SPARE: | |
933 | return (spa_has_spare(spa, device_guid)); | |
e75c13c3 BB |
934 | default: |
935 | break; | |
34dc7c2f BB |
936 | } |
937 | } | |
938 | ||
939 | /* | |
940 | * Check to see if this is an l2cache device. | |
941 | */ | |
942 | if (spa_l2cache_exists(device_guid, NULL)) | |
943 | return (B_TRUE); | |
944 | ||
572e2857 BB |
945 | /* |
946 | * We can't rely on a pool's state if it's been imported | |
947 | * read-only. Instead we look to see if the pools is marked | |
948 | * read-only in the namespace and set the state to active. | |
949 | */ | |
485c581c RY |
950 | if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && |
951 | (spa = spa_by_guid(pool_guid, device_guid)) != NULL && | |
da92d5cb | 952 | spa_mode(spa) == SPA_MODE_READ) |
572e2857 BB |
953 | state = POOL_STATE_ACTIVE; |
954 | ||
34dc7c2f BB |
955 | /* |
956 | * If the device is marked ACTIVE, then this device is in use by another | |
957 | * pool on the system. | |
958 | */ | |
959 | return (state == POOL_STATE_ACTIVE); | |
960 | } | |
961 | ||
962 | /* | |
963 | * Initialize a vdev label. We check to make sure each leaf device is not in | |
964 | * use, and writable. We put down an initial label which we will later | |
965 | * overwrite with a complete label. Note that it's important to do this | |
966 | * sequentially, not in parallel, so that we catch cases of multiple use of the | |
967 | * same leaf vdev in the vdev we're creating -- e.g. mirroring a disk with | |
968 | * itself. | |
969 | */ | |
970 | int | |
971 | vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason) | |
972 | { | |
973 | spa_t *spa = vd->vdev_spa; | |
974 | nvlist_t *label; | |
975 | vdev_phys_t *vp; | |
a6255b7f | 976 | abd_t *vp_abd; |
108a454a | 977 | abd_t *bootenv; |
34dc7c2f | 978 | uberblock_t *ub; |
a6255b7f | 979 | abd_t *ub_abd; |
34dc7c2f | 980 | zio_t *zio; |
34dc7c2f BB |
981 | char *buf; |
982 | size_t buflen; | |
983 | int error; | |
d4ed6673 | 984 | uint64_t spare_guid = 0, l2cache_guid = 0; |
b128c09f | 985 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL; |
34dc7c2f | 986 | |
b128c09f | 987 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); |
34dc7c2f | 988 | |
1c27024e | 989 | for (int c = 0; c < vd->vdev_children; c++) |
34dc7c2f BB |
990 | if ((error = vdev_label_init(vd->vdev_child[c], |
991 | crtxg, reason)) != 0) | |
992 | return (error); | |
993 | ||
428870ff BB |
994 | /* Track the creation time for this vdev */ |
995 | vd->vdev_crtxg = crtxg; | |
996 | ||
dda12da9 | 997 | if (!vd->vdev_ops->vdev_op_leaf || !spa_writeable(spa)) |
34dc7c2f BB |
998 | return (0); |
999 | ||
1000 | /* | |
1001 | * Dead vdevs cannot be initialized. | |
1002 | */ | |
1003 | if (vdev_is_dead(vd)) | |
2e528b49 | 1004 | return (SET_ERROR(EIO)); |
34dc7c2f BB |
1005 | |
1006 | /* | |
1007 | * Determine if the vdev is in use. | |
1008 | */ | |
428870ff | 1009 | if (reason != VDEV_LABEL_REMOVE && reason != VDEV_LABEL_SPLIT && |
34dc7c2f | 1010 | vdev_inuse(vd, crtxg, reason, &spare_guid, &l2cache_guid)) |
2e528b49 | 1011 | return (SET_ERROR(EBUSY)); |
34dc7c2f | 1012 | |
34dc7c2f BB |
1013 | /* |
1014 | * If this is a request to add or replace a spare or l2cache device | |
1015 | * that is in use elsewhere on the system, then we must update the | |
1016 | * guid (which was initialized to a random value) to reflect the | |
1017 | * actual GUID (which is shared between multiple pools). | |
1018 | */ | |
1019 | if (reason != VDEV_LABEL_REMOVE && reason != VDEV_LABEL_L2CACHE && | |
1020 | spare_guid != 0ULL) { | |
b128c09f | 1021 | uint64_t guid_delta = spare_guid - vd->vdev_guid; |
34dc7c2f | 1022 | |
b128c09f | 1023 | vd->vdev_guid += guid_delta; |
34dc7c2f | 1024 | |
1c27024e | 1025 | for (vdev_t *pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) |
b128c09f | 1026 | pvd->vdev_guid_sum += guid_delta; |
34dc7c2f BB |
1027 | |
1028 | /* | |
1029 | * If this is a replacement, then we want to fallthrough to the | |
1030 | * rest of the code. If we're adding a spare, then it's already | |
1031 | * labeled appropriately and we can just return. | |
1032 | */ | |
1033 | if (reason == VDEV_LABEL_SPARE) | |
1034 | return (0); | |
428870ff BB |
1035 | ASSERT(reason == VDEV_LABEL_REPLACE || |
1036 | reason == VDEV_LABEL_SPLIT); | |
34dc7c2f BB |
1037 | } |
1038 | ||
1039 | if (reason != VDEV_LABEL_REMOVE && reason != VDEV_LABEL_SPARE && | |
1040 | l2cache_guid != 0ULL) { | |
b128c09f | 1041 | uint64_t guid_delta = l2cache_guid - vd->vdev_guid; |
34dc7c2f | 1042 | |
b128c09f | 1043 | vd->vdev_guid += guid_delta; |
34dc7c2f | 1044 | |
1c27024e | 1045 | for (vdev_t *pvd = vd; pvd != NULL; pvd = pvd->vdev_parent) |
b128c09f | 1046 | pvd->vdev_guid_sum += guid_delta; |
34dc7c2f BB |
1047 | |
1048 | /* | |
1049 | * If this is a replacement, then we want to fallthrough to the | |
1050 | * rest of the code. If we're adding an l2cache, then it's | |
1051 | * already labeled appropriately and we can just return. | |
1052 | */ | |
1053 | if (reason == VDEV_LABEL_L2CACHE) | |
1054 | return (0); | |
1055 | ASSERT(reason == VDEV_LABEL_REPLACE); | |
1056 | } | |
1057 | ||
1058 | /* | |
1059 | * Initialize its label. | |
1060 | */ | |
a6255b7f DQ |
1061 | vp_abd = abd_alloc_linear(sizeof (vdev_phys_t), B_TRUE); |
1062 | abd_zero(vp_abd, sizeof (vdev_phys_t)); | |
1063 | vp = abd_to_buf(vp_abd); | |
34dc7c2f BB |
1064 | |
1065 | /* | |
1066 | * Generate a label describing the pool and our top-level vdev. | |
1067 | * We mark it as being from txg 0 to indicate that it's not | |
1068 | * really part of an active pool just yet. The labels will | |
1069 | * be written again with a meaningful txg by spa_sync(). | |
1070 | */ | |
1071 | if (reason == VDEV_LABEL_SPARE || | |
1072 | (reason == VDEV_LABEL_REMOVE && vd->vdev_isspare)) { | |
1073 | /* | |
1074 | * For inactive hot spares, we generate a special label that | |
1075 | * identifies as a mutually shared hot spare. We write the | |
1076 | * label if we are adding a hot spare, or if we are removing an | |
1077 | * active hot spare (in which case we want to revert the | |
1078 | * labels). | |
1079 | */ | |
79c76d5b | 1080 | VERIFY(nvlist_alloc(&label, NV_UNIQUE_NAME, KM_SLEEP) == 0); |
34dc7c2f BB |
1081 | |
1082 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_VERSION, | |
1083 | spa_version(spa)) == 0); | |
1084 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1085 | POOL_STATE_SPARE) == 0); | |
1086 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_GUID, | |
1087 | vd->vdev_guid) == 0); | |
1088 | } else if (reason == VDEV_LABEL_L2CACHE || | |
1089 | (reason == VDEV_LABEL_REMOVE && vd->vdev_isl2cache)) { | |
1090 | /* | |
1091 | * For level 2 ARC devices, add a special label. | |
1092 | */ | |
79c76d5b | 1093 | VERIFY(nvlist_alloc(&label, NV_UNIQUE_NAME, KM_SLEEP) == 0); |
34dc7c2f BB |
1094 | |
1095 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_VERSION, | |
1096 | spa_version(spa)) == 0); | |
1097 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_POOL_STATE, | |
1098 | POOL_STATE_L2CACHE) == 0); | |
1099 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_GUID, | |
1100 | vd->vdev_guid) == 0); | |
1101 | } else { | |
428870ff BB |
1102 | uint64_t txg = 0ULL; |
1103 | ||
1104 | if (reason == VDEV_LABEL_SPLIT) | |
1105 | txg = spa->spa_uberblock.ub_txg; | |
1106 | label = spa_config_generate(spa, vd, txg, B_FALSE); | |
34dc7c2f BB |
1107 | |
1108 | /* | |
1109 | * Add our creation time. This allows us to detect multiple | |
1110 | * vdev uses as described above, and automatically expires if we | |
1111 | * fail. | |
1112 | */ | |
1113 | VERIFY(nvlist_add_uint64(label, ZPOOL_CONFIG_CREATE_TXG, | |
1114 | crtxg) == 0); | |
1115 | } | |
1116 | ||
1117 | buf = vp->vp_nvlist; | |
1118 | buflen = sizeof (vp->vp_nvlist); | |
1119 | ||
79c76d5b | 1120 | error = nvlist_pack(label, &buf, &buflen, NV_ENCODE_XDR, KM_SLEEP); |
34dc7c2f BB |
1121 | if (error != 0) { |
1122 | nvlist_free(label); | |
a6255b7f | 1123 | abd_free(vp_abd); |
34dc7c2f | 1124 | /* EFAULT means nvlist_pack ran out of room */ |
ecb2b7dc | 1125 | return (SET_ERROR(error == EFAULT ? ENAMETOOLONG : EINVAL)); |
34dc7c2f BB |
1126 | } |
1127 | ||
34dc7c2f BB |
1128 | /* |
1129 | * Initialize uberblock template. | |
1130 | */ | |
a6255b7f DQ |
1131 | ub_abd = abd_alloc_linear(VDEV_UBERBLOCK_RING, B_TRUE); |
1132 | abd_zero(ub_abd, VDEV_UBERBLOCK_RING); | |
1133 | abd_copy_from_buf(ub_abd, &spa->spa_uberblock, sizeof (uberblock_t)); | |
1134 | ub = abd_to_buf(ub_abd); | |
34dc7c2f BB |
1135 | ub->ub_txg = 0; |
1136 | ||
9babb374 | 1137 | /* Initialize the 2nd padding area. */ |
108a454a PD |
1138 | bootenv = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE); |
1139 | abd_zero(bootenv, VDEV_PAD_SIZE); | |
9babb374 | 1140 | |
34dc7c2f BB |
1141 | /* |
1142 | * Write everything in parallel. | |
1143 | */ | |
9babb374 | 1144 | retry: |
34dc7c2f BB |
1145 | zio = zio_root(spa, NULL, NULL, flags); |
1146 | ||
1c27024e | 1147 | for (int l = 0; l < VDEV_LABELS; l++) { |
34dc7c2f | 1148 | |
a6255b7f | 1149 | vdev_label_write(zio, vd, l, vp_abd, |
34dc7c2f BB |
1150 | offsetof(vdev_label_t, vl_vdev_phys), |
1151 | sizeof (vdev_phys_t), NULL, NULL, flags); | |
1152 | ||
9babb374 BB |
1153 | /* |
1154 | * Skip the 1st padding area. | |
1155 | * Zero out the 2nd padding area where it might have | |
1156 | * left over data from previous filesystem format. | |
1157 | */ | |
108a454a PD |
1158 | vdev_label_write(zio, vd, l, bootenv, |
1159 | offsetof(vdev_label_t, vl_be), | |
9babb374 | 1160 | VDEV_PAD_SIZE, NULL, NULL, flags); |
34dc7c2f | 1161 | |
a6255b7f | 1162 | vdev_label_write(zio, vd, l, ub_abd, |
45d1cae3 BB |
1163 | offsetof(vdev_label_t, vl_uberblock), |
1164 | VDEV_UBERBLOCK_RING, NULL, NULL, flags); | |
34dc7c2f BB |
1165 | } |
1166 | ||
1167 | error = zio_wait(zio); | |
1168 | ||
9babb374 BB |
1169 | if (error != 0 && !(flags & ZIO_FLAG_TRYHARD)) { |
1170 | flags |= ZIO_FLAG_TRYHARD; | |
1171 | goto retry; | |
1172 | } | |
1173 | ||
34dc7c2f | 1174 | nvlist_free(label); |
108a454a | 1175 | abd_free(bootenv); |
a6255b7f DQ |
1176 | abd_free(ub_abd); |
1177 | abd_free(vp_abd); | |
34dc7c2f BB |
1178 | |
1179 | /* | |
1180 | * If this vdev hasn't been previously identified as a spare, then we | |
1181 | * mark it as such only if a) we are labeling it as a spare, or b) it | |
1182 | * exists as a spare elsewhere in the system. Do the same for | |
1183 | * level 2 ARC devices. | |
1184 | */ | |
1185 | if (error == 0 && !vd->vdev_isspare && | |
1186 | (reason == VDEV_LABEL_SPARE || | |
b128c09f | 1187 | spa_spare_exists(vd->vdev_guid, NULL, NULL))) |
34dc7c2f BB |
1188 | spa_spare_add(vd); |
1189 | ||
1190 | if (error == 0 && !vd->vdev_isl2cache && | |
1191 | (reason == VDEV_LABEL_L2CACHE || | |
1192 | spa_l2cache_exists(vd->vdev_guid, NULL))) | |
1193 | spa_l2cache_add(vd); | |
1194 | ||
1195 | return (error); | |
1196 | } | |
1197 | ||
108a454a PD |
1198 | /* |
1199 | * Done callback for vdev_label_read_bootenv_impl. If this is the first | |
1200 | * callback to finish, store our abd in the callback pointer. Otherwise, we | |
1201 | * just free our abd and return. | |
1202 | */ | |
1203 | static void | |
1204 | vdev_label_read_bootenv_done(zio_t *zio) | |
1205 | { | |
1206 | zio_t *rio = zio->io_private; | |
1207 | abd_t **cbp = rio->io_private; | |
1208 | ||
1209 | ASSERT3U(zio->io_size, ==, VDEV_PAD_SIZE); | |
1210 | ||
1211 | if (zio->io_error == 0) { | |
1212 | mutex_enter(&rio->io_lock); | |
1213 | if (*cbp == NULL) { | |
1214 | /* Will free this buffer in vdev_label_read_bootenv. */ | |
1215 | *cbp = zio->io_abd; | |
1216 | } else { | |
1217 | abd_free(zio->io_abd); | |
1218 | } | |
1219 | mutex_exit(&rio->io_lock); | |
1220 | } else { | |
1221 | abd_free(zio->io_abd); | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | static void | |
1226 | vdev_label_read_bootenv_impl(zio_t *zio, vdev_t *vd, int flags) | |
1227 | { | |
1228 | for (int c = 0; c < vd->vdev_children; c++) | |
1229 | vdev_label_read_bootenv_impl(zio, vd->vdev_child[c], flags); | |
1230 | ||
1231 | /* | |
1232 | * We just use the first label that has a correct checksum; the | |
1233 | * bootloader should have rewritten them all to be the same on boot, | |
1234 | * and any changes we made since boot have been the same across all | |
1235 | * labels. | |
1236 | * | |
1237 | * While grub supports writing to all four labels, other bootloaders | |
1238 | * don't, so we only use the first two labels to store boot | |
1239 | * information. | |
1240 | */ | |
1241 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { | |
1242 | for (int l = 0; l < VDEV_LABELS / 2; l++) { | |
1243 | vdev_label_read(zio, vd, l, | |
1244 | abd_alloc_linear(VDEV_PAD_SIZE, B_FALSE), | |
1245 | offsetof(vdev_label_t, vl_be), VDEV_PAD_SIZE, | |
1246 | vdev_label_read_bootenv_done, zio, flags); | |
1247 | } | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | int | |
1252 | vdev_label_read_bootenv(vdev_t *rvd, nvlist_t *command) | |
1253 | { | |
1254 | spa_t *spa = rvd->vdev_spa; | |
1255 | abd_t *abd = NULL; | |
1256 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL | | |
1257 | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_TRYHARD; | |
1258 | ||
1259 | ASSERT(command); | |
1260 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
1261 | ||
1262 | zio_t *zio = zio_root(spa, NULL, &abd, flags); | |
1263 | vdev_label_read_bootenv_impl(zio, rvd, flags); | |
1264 | int err = zio_wait(zio); | |
1265 | ||
1266 | if (abd != NULL) { | |
1267 | vdev_boot_envblock_t *vbe = abd_to_buf(abd); | |
1268 | if (vbe->vbe_version != VB_RAW) { | |
1269 | abd_free(abd); | |
1270 | return (SET_ERROR(ENOTSUP)); | |
1271 | } | |
1272 | vbe->vbe_bootenv[sizeof (vbe->vbe_bootenv) - 1] = '\0'; | |
1273 | fnvlist_add_string(command, "envmap", vbe->vbe_bootenv); | |
1274 | /* abd was allocated in vdev_label_read_bootenv_impl() */ | |
1275 | abd_free(abd); | |
1276 | /* If we managed to read any successfully, return success. */ | |
1277 | return (0); | |
1278 | } | |
1279 | return (err); | |
1280 | } | |
1281 | ||
1282 | int | |
1283 | vdev_label_write_bootenv(vdev_t *vd, char *envmap) | |
1284 | { | |
1285 | zio_t *zio; | |
1286 | spa_t *spa = vd->vdev_spa; | |
1287 | vdev_boot_envblock_t *bootenv; | |
1288 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL; | |
1289 | int error = ENXIO; | |
1290 | ||
1291 | if (strlen(envmap) >= sizeof (bootenv->vbe_bootenv)) { | |
1292 | return (SET_ERROR(E2BIG)); | |
1293 | } | |
1294 | ||
1295 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
1296 | ||
1297 | for (int c = 0; c < vd->vdev_children; c++) { | |
1298 | int child_err = vdev_label_write_bootenv(vd->vdev_child[c], | |
1299 | envmap); | |
1300 | /* | |
1301 | * As long as any of the disks managed to write all of their | |
1302 | * labels successfully, return success. | |
1303 | */ | |
1304 | if (child_err == 0) | |
1305 | error = child_err; | |
1306 | } | |
1307 | ||
1308 | if (!vd->vdev_ops->vdev_op_leaf || vdev_is_dead(vd) || | |
1309 | !vdev_writeable(vd)) { | |
1310 | return (error); | |
1311 | } | |
1312 | ASSERT3U(sizeof (*bootenv), ==, VDEV_PAD_SIZE); | |
1313 | abd_t *abd = abd_alloc_for_io(VDEV_PAD_SIZE, B_TRUE); | |
1314 | abd_zero(abd, VDEV_PAD_SIZE); | |
1315 | bootenv = abd_borrow_buf_copy(abd, VDEV_PAD_SIZE); | |
1316 | ||
1317 | char *buf = bootenv->vbe_bootenv; | |
1318 | (void) strlcpy(buf, envmap, sizeof (bootenv->vbe_bootenv)); | |
1319 | bootenv->vbe_version = VB_RAW; | |
1320 | abd_return_buf_copy(abd, bootenv, VDEV_PAD_SIZE); | |
1321 | ||
1322 | retry: | |
1323 | zio = zio_root(spa, NULL, NULL, flags); | |
1324 | for (int l = 0; l < VDEV_LABELS / 2; l++) { | |
1325 | vdev_label_write(zio, vd, l, abd, | |
1326 | offsetof(vdev_label_t, vl_be), | |
1327 | VDEV_PAD_SIZE, NULL, NULL, flags); | |
1328 | } | |
1329 | ||
1330 | error = zio_wait(zio); | |
1331 | if (error != 0 && !(flags & ZIO_FLAG_TRYHARD)) { | |
1332 | flags |= ZIO_FLAG_TRYHARD; | |
1333 | goto retry; | |
1334 | } | |
1335 | ||
1336 | abd_free(abd); | |
1337 | return (error); | |
1338 | } | |
1339 | ||
34dc7c2f BB |
1340 | /* |
1341 | * ========================================================================== | |
1342 | * uberblock load/sync | |
1343 | * ========================================================================== | |
1344 | */ | |
1345 | ||
1346 | /* | |
1347 | * Consider the following situation: txg is safely synced to disk. We've | |
1348 | * written the first uberblock for txg + 1, and then we lose power. When we | |
1349 | * come back up, we fail to see the uberblock for txg + 1 because, say, | |
1350 | * it was on a mirrored device and the replica to which we wrote txg + 1 | |
1351 | * is now offline. If we then make some changes and sync txg + 1, and then | |
9ae529ec | 1352 | * the missing replica comes back, then for a few seconds we'll have two |
34dc7c2f BB |
1353 | * conflicting uberblocks on disk with the same txg. The solution is simple: |
1354 | * among uberblocks with equal txg, choose the one with the latest timestamp. | |
1355 | */ | |
1356 | static int | |
ee36c709 | 1357 | vdev_uberblock_compare(const uberblock_t *ub1, const uberblock_t *ub2) |
34dc7c2f | 1358 | { |
ca577779 | 1359 | int cmp = TREE_CMP(ub1->ub_txg, ub2->ub_txg); |
060f0226 | 1360 | |
ee36c709 GN |
1361 | if (likely(cmp)) |
1362 | return (cmp); | |
34dc7c2f | 1363 | |
ca577779 | 1364 | cmp = TREE_CMP(ub1->ub_timestamp, ub2->ub_timestamp); |
060f0226 OF |
1365 | if (likely(cmp)) |
1366 | return (cmp); | |
1367 | ||
1368 | /* | |
1369 | * If MMP_VALID(ub) && MMP_SEQ_VALID(ub) then the host has an MMP-aware | |
1370 | * ZFS, e.g. zfsonlinux >= 0.7. | |
1371 | * | |
1372 | * If one ub has MMP and the other does not, they were written by | |
1373 | * different hosts, which matters for MMP. So we treat no MMP/no SEQ as | |
1374 | * a 0 value. | |
1375 | * | |
1376 | * Since timestamp and txg are the same if we get this far, either is | |
1377 | * acceptable for importing the pool. | |
1378 | */ | |
1379 | unsigned int seq1 = 0; | |
1380 | unsigned int seq2 = 0; | |
1381 | ||
1382 | if (MMP_VALID(ub1) && MMP_SEQ_VALID(ub1)) | |
1383 | seq1 = MMP_SEQ(ub1); | |
1384 | ||
1385 | if (MMP_VALID(ub2) && MMP_SEQ_VALID(ub2)) | |
1386 | seq2 = MMP_SEQ(ub2); | |
1387 | ||
ca577779 | 1388 | return (TREE_CMP(seq1, seq2)); |
34dc7c2f BB |
1389 | } |
1390 | ||
9ae529ec CS |
1391 | struct ubl_cbdata { |
1392 | uberblock_t *ubl_ubbest; /* Best uberblock */ | |
1393 | vdev_t *ubl_vd; /* vdev associated with the above */ | |
9ae529ec CS |
1394 | }; |
1395 | ||
34dc7c2f BB |
1396 | static void |
1397 | vdev_uberblock_load_done(zio_t *zio) | |
1398 | { | |
9ae529ec | 1399 | vdev_t *vd = zio->io_vd; |
428870ff | 1400 | spa_t *spa = zio->io_spa; |
b128c09f | 1401 | zio_t *rio = zio->io_private; |
a6255b7f | 1402 | uberblock_t *ub = abd_to_buf(zio->io_abd); |
9ae529ec | 1403 | struct ubl_cbdata *cbp = rio->io_private; |
34dc7c2f | 1404 | |
9ae529ec | 1405 | ASSERT3U(zio->io_size, ==, VDEV_UBERBLOCK_SIZE(vd)); |
34dc7c2f BB |
1406 | |
1407 | if (zio->io_error == 0 && uberblock_verify(ub) == 0) { | |
b128c09f | 1408 | mutex_enter(&rio->io_lock); |
428870ff | 1409 | if (ub->ub_txg <= spa->spa_load_max_txg && |
9ae529ec CS |
1410 | vdev_uberblock_compare(ub, cbp->ubl_ubbest) > 0) { |
1411 | /* | |
3bc7e0fb GW |
1412 | * Keep track of the vdev in which this uberblock |
1413 | * was found. We will use this information later | |
1414 | * to obtain the config nvlist associated with | |
9ae529ec CS |
1415 | * this uberblock. |
1416 | */ | |
1417 | *cbp->ubl_ubbest = *ub; | |
1418 | cbp->ubl_vd = vd; | |
9ae529ec | 1419 | } |
b128c09f | 1420 | mutex_exit(&rio->io_lock); |
34dc7c2f BB |
1421 | } |
1422 | ||
a6255b7f | 1423 | abd_free(zio->io_abd); |
34dc7c2f BB |
1424 | } |
1425 | ||
9ae529ec CS |
1426 | static void |
1427 | vdev_uberblock_load_impl(zio_t *zio, vdev_t *vd, int flags, | |
1428 | struct ubl_cbdata *cbp) | |
34dc7c2f | 1429 | { |
379ca9cf | 1430 | for (int c = 0; c < vd->vdev_children; c++) |
9ae529ec | 1431 | vdev_uberblock_load_impl(zio, vd->vdev_child[c], flags, cbp); |
34dc7c2f | 1432 | |
b128c09f | 1433 | if (vd->vdev_ops->vdev_op_leaf && vdev_readable(vd)) { |
379ca9cf OF |
1434 | for (int l = 0; l < VDEV_LABELS; l++) { |
1435 | for (int n = 0; n < VDEV_UBERBLOCK_COUNT(vd); n++) { | |
b128c09f | 1436 | vdev_label_read(zio, vd, l, |
a6255b7f DQ |
1437 | abd_alloc_linear(VDEV_UBERBLOCK_SIZE(vd), |
1438 | B_TRUE), VDEV_UBERBLOCK_OFFSET(vd, n), | |
b128c09f BB |
1439 | VDEV_UBERBLOCK_SIZE(vd), |
1440 | vdev_uberblock_load_done, zio, flags); | |
1441 | } | |
34dc7c2f BB |
1442 | } |
1443 | } | |
9ae529ec CS |
1444 | } |
1445 | ||
1446 | /* | |
1447 | * Reads the 'best' uberblock from disk along with its associated | |
1448 | * configuration. First, we read the uberblock array of each label of each | |
1449 | * vdev, keeping track of the uberblock with the highest txg in each array. | |
3bc7e0fb | 1450 | * Then, we read the configuration from the same vdev as the best uberblock. |
9ae529ec CS |
1451 | */ |
1452 | void | |
1453 | vdev_uberblock_load(vdev_t *rvd, uberblock_t *ub, nvlist_t **config) | |
1454 | { | |
9ae529ec CS |
1455 | zio_t *zio; |
1456 | spa_t *spa = rvd->vdev_spa; | |
1457 | struct ubl_cbdata cb; | |
1458 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL | | |
1459 | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_TRYHARD; | |
1460 | ||
1461 | ASSERT(ub); | |
1462 | ASSERT(config); | |
b128c09f | 1463 | |
9ae529ec CS |
1464 | bzero(ub, sizeof (uberblock_t)); |
1465 | *config = NULL; | |
1466 | ||
1467 | cb.ubl_ubbest = ub; | |
1468 | cb.ubl_vd = NULL; | |
1469 | ||
1470 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); | |
1471 | zio = zio_root(spa, NULL, &cb, flags); | |
1472 | vdev_uberblock_load_impl(zio, rvd, flags, &cb); | |
1473 | (void) zio_wait(zio); | |
3bc7e0fb GW |
1474 | |
1475 | /* | |
1476 | * It's possible that the best uberblock was discovered on a label | |
1477 | * that has a configuration which was written in a future txg. | |
1478 | * Search all labels on this vdev to find the configuration that | |
1479 | * matches the txg for our uberblock. | |
1480 | */ | |
4a0ee12a PZ |
1481 | if (cb.ubl_vd != NULL) { |
1482 | vdev_dbgmsg(cb.ubl_vd, "best uberblock found for spa %s. " | |
1483 | "txg %llu", spa->spa_name, (u_longlong_t)ub->ub_txg); | |
1484 | ||
3bc7e0fb | 1485 | *config = vdev_label_read_config(cb.ubl_vd, ub->ub_txg); |
6cb8e530 PZ |
1486 | if (*config == NULL && spa->spa_extreme_rewind) { |
1487 | vdev_dbgmsg(cb.ubl_vd, "failed to read label config. " | |
1488 | "Trying again without txg restrictions."); | |
1489 | *config = vdev_label_read_config(cb.ubl_vd, UINT64_MAX); | |
1490 | } | |
4a0ee12a PZ |
1491 | if (*config == NULL) { |
1492 | vdev_dbgmsg(cb.ubl_vd, "failed to read label config"); | |
1493 | } | |
1494 | } | |
9ae529ec | 1495 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
1496 | } |
1497 | ||
9d3f7b87 OF |
1498 | /* |
1499 | * For use when a leaf vdev is expanded. | |
1500 | * The location of labels 2 and 3 changed, and at the new location the | |
1501 | * uberblock rings are either empty or contain garbage. The sync will write | |
1502 | * new configs there because the vdev is dirty, but expansion also needs the | |
1503 | * uberblock rings copied. Read them from label 0 which did not move. | |
1504 | * | |
1505 | * Since the point is to populate labels {2,3} with valid uberblocks, | |
1506 | * we zero uberblocks we fail to read or which are not valid. | |
1507 | */ | |
1508 | ||
1509 | static void | |
1510 | vdev_copy_uberblocks(vdev_t *vd) | |
1511 | { | |
1512 | abd_t *ub_abd; | |
1513 | zio_t *write_zio; | |
1514 | int locks = (SCL_L2ARC | SCL_ZIO); | |
1515 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL | | |
1516 | ZIO_FLAG_SPECULATIVE; | |
1517 | ||
1518 | ASSERT(spa_config_held(vd->vdev_spa, SCL_STATE, RW_READER) == | |
1519 | SCL_STATE); | |
1520 | ASSERT(vd->vdev_ops->vdev_op_leaf); | |
1521 | ||
1522 | spa_config_enter(vd->vdev_spa, locks, FTAG, RW_READER); | |
1523 | ||
eea2e241 | 1524 | ub_abd = abd_alloc_linear(VDEV_UBERBLOCK_SIZE(vd), B_TRUE); |
9d3f7b87 OF |
1525 | |
1526 | write_zio = zio_root(vd->vdev_spa, NULL, NULL, flags); | |
1527 | for (int n = 0; n < VDEV_UBERBLOCK_COUNT(vd); n++) { | |
1528 | const int src_label = 0; | |
1529 | zio_t *zio; | |
1530 | ||
1531 | zio = zio_root(vd->vdev_spa, NULL, NULL, flags); | |
1532 | vdev_label_read(zio, vd, src_label, ub_abd, | |
1533 | VDEV_UBERBLOCK_OFFSET(vd, n), VDEV_UBERBLOCK_SIZE(vd), | |
1534 | NULL, NULL, flags); | |
1535 | ||
1536 | if (zio_wait(zio) || uberblock_verify(abd_to_buf(ub_abd))) | |
1537 | abd_zero(ub_abd, VDEV_UBERBLOCK_SIZE(vd)); | |
1538 | ||
1539 | for (int l = 2; l < VDEV_LABELS; l++) | |
1540 | vdev_label_write(write_zio, vd, l, ub_abd, | |
1541 | VDEV_UBERBLOCK_OFFSET(vd, n), | |
1542 | VDEV_UBERBLOCK_SIZE(vd), NULL, NULL, | |
1543 | flags | ZIO_FLAG_DONT_PROPAGATE); | |
1544 | } | |
1545 | (void) zio_wait(write_zio); | |
1546 | ||
1547 | spa_config_exit(vd->vdev_spa, locks, FTAG); | |
1548 | ||
1549 | abd_free(ub_abd); | |
1550 | } | |
1551 | ||
34dc7c2f BB |
1552 | /* |
1553 | * On success, increment root zio's count of good writes. | |
1554 | * We only get credit for writes to known-visible vdevs; see spa_vdev_add(). | |
1555 | */ | |
1556 | static void | |
1557 | vdev_uberblock_sync_done(zio_t *zio) | |
1558 | { | |
1559 | uint64_t *good_writes = zio->io_private; | |
1560 | ||
1561 | if (zio->io_error == 0 && zio->io_vd->vdev_top->vdev_ms_array != 0) | |
bc89ac84 | 1562 | atomic_inc_64(good_writes); |
34dc7c2f BB |
1563 | } |
1564 | ||
1565 | /* | |
1566 | * Write the uberblock to all labels of all leaves of the specified vdev. | |
1567 | */ | |
1568 | static void | |
7f96cc23 MA |
1569 | vdev_uberblock_sync(zio_t *zio, uint64_t *good_writes, |
1570 | uberblock_t *ub, vdev_t *vd, int flags) | |
34dc7c2f | 1571 | { |
7f96cc23 MA |
1572 | for (uint64_t c = 0; c < vd->vdev_children; c++) { |
1573 | vdev_uberblock_sync(zio, good_writes, | |
1574 | ub, vd->vdev_child[c], flags); | |
1575 | } | |
34dc7c2f BB |
1576 | |
1577 | if (!vd->vdev_ops->vdev_op_leaf) | |
1578 | return; | |
1579 | ||
b128c09f | 1580 | if (!vdev_writeable(vd)) |
34dc7c2f BB |
1581 | return; |
1582 | ||
9d3f7b87 OF |
1583 | /* If the vdev was expanded, need to copy uberblock rings. */ |
1584 | if (vd->vdev_state == VDEV_STATE_HEALTHY && | |
1585 | vd->vdev_copy_uberblocks == B_TRUE) { | |
1586 | vdev_copy_uberblocks(vd); | |
1587 | vd->vdev_copy_uberblocks = B_FALSE; | |
1588 | } | |
1589 | ||
379ca9cf OF |
1590 | int m = spa_multihost(vd->vdev_spa) ? MMP_BLOCKS_PER_LABEL : 0; |
1591 | int n = ub->ub_txg % (VDEV_UBERBLOCK_COUNT(vd) - m); | |
34dc7c2f | 1592 | |
a6255b7f | 1593 | /* Copy the uberblock_t into the ABD */ |
379ca9cf | 1594 | abd_t *ub_abd = abd_alloc_for_io(VDEV_UBERBLOCK_SIZE(vd), B_TRUE); |
a6255b7f DQ |
1595 | abd_zero(ub_abd, VDEV_UBERBLOCK_SIZE(vd)); |
1596 | abd_copy_from_buf(ub_abd, ub, sizeof (uberblock_t)); | |
34dc7c2f | 1597 | |
379ca9cf | 1598 | for (int l = 0; l < VDEV_LABELS; l++) |
a6255b7f | 1599 | vdev_label_write(zio, vd, l, ub_abd, |
b128c09f | 1600 | VDEV_UBERBLOCK_OFFSET(vd, n), VDEV_UBERBLOCK_SIZE(vd), |
7f96cc23 | 1601 | vdev_uberblock_sync_done, good_writes, |
b128c09f | 1602 | flags | ZIO_FLAG_DONT_PROPAGATE); |
34dc7c2f | 1603 | |
a6255b7f | 1604 | abd_free(ub_abd); |
34dc7c2f BB |
1605 | } |
1606 | ||
e49f1e20 | 1607 | /* Sync the uberblocks to all vdevs in svd[] */ |
65c7cc49 | 1608 | static int |
34dc7c2f BB |
1609 | vdev_uberblock_sync_list(vdev_t **svd, int svdcount, uberblock_t *ub, int flags) |
1610 | { | |
1611 | spa_t *spa = svd[0]->vdev_spa; | |
34dc7c2f BB |
1612 | zio_t *zio; |
1613 | uint64_t good_writes = 0; | |
1614 | ||
7f96cc23 | 1615 | zio = zio_root(spa, NULL, NULL, flags); |
34dc7c2f | 1616 | |
1c27024e | 1617 | for (int v = 0; v < svdcount; v++) |
7f96cc23 | 1618 | vdev_uberblock_sync(zio, &good_writes, ub, svd[v], flags); |
34dc7c2f BB |
1619 | |
1620 | (void) zio_wait(zio); | |
1621 | ||
1622 | /* | |
1623 | * Flush the uberblocks to disk. This ensures that the odd labels | |
1624 | * are no longer needed (because the new uberblocks and the even | |
1625 | * labels are safely on disk), so it is safe to overwrite them. | |
1626 | */ | |
1627 | zio = zio_root(spa, NULL, NULL, flags); | |
1628 | ||
a1d477c2 MA |
1629 | for (int v = 0; v < svdcount; v++) { |
1630 | if (vdev_writeable(svd[v])) { | |
1631 | zio_flush(zio, svd[v]); | |
1632 | } | |
1633 | } | |
34dc7c2f BB |
1634 | |
1635 | (void) zio_wait(zio); | |
1636 | ||
1637 | return (good_writes >= 1 ? 0 : EIO); | |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * On success, increment the count of good writes for our top-level vdev. | |
1642 | */ | |
1643 | static void | |
1644 | vdev_label_sync_done(zio_t *zio) | |
1645 | { | |
1646 | uint64_t *good_writes = zio->io_private; | |
1647 | ||
1648 | if (zio->io_error == 0) | |
bc89ac84 | 1649 | atomic_inc_64(good_writes); |
34dc7c2f BB |
1650 | } |
1651 | ||
1652 | /* | |
1653 | * If there weren't enough good writes, indicate failure to the parent. | |
1654 | */ | |
1655 | static void | |
1656 | vdev_label_sync_top_done(zio_t *zio) | |
1657 | { | |
1658 | uint64_t *good_writes = zio->io_private; | |
1659 | ||
1660 | if (*good_writes == 0) | |
2e528b49 | 1661 | zio->io_error = SET_ERROR(EIO); |
34dc7c2f BB |
1662 | |
1663 | kmem_free(good_writes, sizeof (uint64_t)); | |
1664 | } | |
1665 | ||
b128c09f BB |
1666 | /* |
1667 | * We ignore errors for log and cache devices, simply free the private data. | |
1668 | */ | |
1669 | static void | |
1670 | vdev_label_sync_ignore_done(zio_t *zio) | |
1671 | { | |
1672 | kmem_free(zio->io_private, sizeof (uint64_t)); | |
1673 | } | |
1674 | ||
34dc7c2f BB |
1675 | /* |
1676 | * Write all even or odd labels to all leaves of the specified vdev. | |
1677 | */ | |
1678 | static void | |
7f96cc23 MA |
1679 | vdev_label_sync(zio_t *zio, uint64_t *good_writes, |
1680 | vdev_t *vd, int l, uint64_t txg, int flags) | |
34dc7c2f BB |
1681 | { |
1682 | nvlist_t *label; | |
1683 | vdev_phys_t *vp; | |
a6255b7f | 1684 | abd_t *vp_abd; |
34dc7c2f BB |
1685 | char *buf; |
1686 | size_t buflen; | |
34dc7c2f | 1687 | |
7f96cc23 MA |
1688 | for (int c = 0; c < vd->vdev_children; c++) { |
1689 | vdev_label_sync(zio, good_writes, | |
1690 | vd->vdev_child[c], l, txg, flags); | |
1691 | } | |
34dc7c2f BB |
1692 | |
1693 | if (!vd->vdev_ops->vdev_op_leaf) | |
1694 | return; | |
1695 | ||
b128c09f | 1696 | if (!vdev_writeable(vd)) |
34dc7c2f BB |
1697 | return; |
1698 | ||
1699 | /* | |
1700 | * Generate a label describing the top-level config to which we belong. | |
1701 | */ | |
1702 | label = spa_config_generate(vd->vdev_spa, vd, txg, B_FALSE); | |
1703 | ||
a6255b7f DQ |
1704 | vp_abd = abd_alloc_linear(sizeof (vdev_phys_t), B_TRUE); |
1705 | abd_zero(vp_abd, sizeof (vdev_phys_t)); | |
1706 | vp = abd_to_buf(vp_abd); | |
34dc7c2f BB |
1707 | |
1708 | buf = vp->vp_nvlist; | |
1709 | buflen = sizeof (vp->vp_nvlist); | |
1710 | ||
79c76d5b | 1711 | if (!nvlist_pack(label, &buf, &buflen, NV_ENCODE_XDR, KM_SLEEP)) { |
34dc7c2f | 1712 | for (; l < VDEV_LABELS; l += 2) { |
a6255b7f | 1713 | vdev_label_write(zio, vd, l, vp_abd, |
34dc7c2f BB |
1714 | offsetof(vdev_label_t, vl_vdev_phys), |
1715 | sizeof (vdev_phys_t), | |
7f96cc23 | 1716 | vdev_label_sync_done, good_writes, |
b128c09f | 1717 | flags | ZIO_FLAG_DONT_PROPAGATE); |
34dc7c2f BB |
1718 | } |
1719 | } | |
1720 | ||
a6255b7f | 1721 | abd_free(vp_abd); |
34dc7c2f BB |
1722 | nvlist_free(label); |
1723 | } | |
1724 | ||
65c7cc49 | 1725 | static int |
b128c09f | 1726 | vdev_label_sync_list(spa_t *spa, int l, uint64_t txg, int flags) |
34dc7c2f | 1727 | { |
b128c09f | 1728 | list_t *dl = &spa->spa_config_dirty_list; |
34dc7c2f BB |
1729 | vdev_t *vd; |
1730 | zio_t *zio; | |
1731 | int error; | |
1732 | ||
1733 | /* | |
1734 | * Write the new labels to disk. | |
1735 | */ | |
1736 | zio = zio_root(spa, NULL, NULL, flags); | |
1737 | ||
1738 | for (vd = list_head(dl); vd != NULL; vd = list_next(dl, vd)) { | |
d6320ddb | 1739 | uint64_t *good_writes; |
428870ff BB |
1740 | |
1741 | ASSERT(!vd->vdev_ishole); | |
1742 | ||
79c76d5b | 1743 | good_writes = kmem_zalloc(sizeof (uint64_t), KM_SLEEP); |
1c27024e | 1744 | zio_t *vio = zio_null(zio, spa, NULL, |
b128c09f BB |
1745 | (vd->vdev_islog || vd->vdev_aux != NULL) ? |
1746 | vdev_label_sync_ignore_done : vdev_label_sync_top_done, | |
34dc7c2f | 1747 | good_writes, flags); |
7f96cc23 | 1748 | vdev_label_sync(vio, good_writes, vd, l, txg, flags); |
34dc7c2f BB |
1749 | zio_nowait(vio); |
1750 | } | |
1751 | ||
1752 | error = zio_wait(zio); | |
1753 | ||
1754 | /* | |
1755 | * Flush the new labels to disk. | |
1756 | */ | |
1757 | zio = zio_root(spa, NULL, NULL, flags); | |
1758 | ||
1759 | for (vd = list_head(dl); vd != NULL; vd = list_next(dl, vd)) | |
1760 | zio_flush(zio, vd); | |
1761 | ||
1762 | (void) zio_wait(zio); | |
1763 | ||
1764 | return (error); | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * Sync the uberblock and any changes to the vdev configuration. | |
1769 | * | |
1770 | * The order of operations is carefully crafted to ensure that | |
1771 | * if the system panics or loses power at any time, the state on disk | |
1772 | * is still transactionally consistent. The in-line comments below | |
1773 | * describe the failure semantics at each stage. | |
1774 | * | |
1775 | * Moreover, vdev_config_sync() is designed to be idempotent: if it fails | |
1776 | * at any time, you can just call it again, and it will resume its work. | |
1777 | */ | |
1778 | int | |
b6fcb792 | 1779 | vdev_config_sync(vdev_t **svd, int svdcount, uint64_t txg) |
34dc7c2f BB |
1780 | { |
1781 | spa_t *spa = svd[0]->vdev_spa; | |
1782 | uberblock_t *ub = &spa->spa_uberblock; | |
b6fcb792 | 1783 | int error = 0; |
b128c09f | 1784 | int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL; |
34dc7c2f | 1785 | |
d2734cce | 1786 | ASSERT(svdcount != 0); |
b6fcb792 | 1787 | retry: |
9babb374 BB |
1788 | /* |
1789 | * Normally, we don't want to try too hard to write every label and | |
1790 | * uberblock. If there is a flaky disk, we don't want the rest of the | |
1791 | * sync process to block while we retry. But if we can't write a | |
1792 | * single label out, we should retry with ZIO_FLAG_TRYHARD before | |
1793 | * bailing out and declaring the pool faulted. | |
1794 | */ | |
b6fcb792 BB |
1795 | if (error != 0) { |
1796 | if ((flags & ZIO_FLAG_TRYHARD) != 0) | |
1797 | return (error); | |
9babb374 | 1798 | flags |= ZIO_FLAG_TRYHARD; |
b6fcb792 | 1799 | } |
9babb374 | 1800 | |
34dc7c2f BB |
1801 | ASSERT(ub->ub_txg <= txg); |
1802 | ||
1803 | /* | |
1804 | * If this isn't a resync due to I/O errors, | |
1805 | * and nothing changed in this transaction group, | |
1806 | * and the vdev configuration hasn't changed, | |
1807 | * then there's nothing to do. | |
1808 | */ | |
379ca9cf OF |
1809 | if (ub->ub_txg < txg) { |
1810 | boolean_t changed = uberblock_update(ub, spa->spa_root_vdev, | |
1811 | txg, spa->spa_mmp.mmp_delay); | |
1812 | ||
1813 | if (!changed && list_is_empty(&spa->spa_config_dirty_list)) | |
1814 | return (0); | |
1815 | } | |
34dc7c2f BB |
1816 | |
1817 | if (txg > spa_freeze_txg(spa)) | |
1818 | return (0); | |
1819 | ||
1820 | ASSERT(txg <= spa->spa_final_txg); | |
1821 | ||
1822 | /* | |
1823 | * Flush the write cache of every disk that's been written to | |
1824 | * in this transaction group. This ensures that all blocks | |
1825 | * written in this txg will be committed to stable storage | |
1826 | * before any uberblock that references them. | |
1827 | */ | |
d2734cce | 1828 | zio_t *zio = zio_root(spa, NULL, NULL, flags); |
34dc7c2f | 1829 | |
d2734cce SD |
1830 | for (vdev_t *vd = |
1831 | txg_list_head(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)); vd != NULL; | |
34dc7c2f BB |
1832 | vd = txg_list_next(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg))) |
1833 | zio_flush(zio, vd); | |
1834 | ||
1835 | (void) zio_wait(zio); | |
1836 | ||
1837 | /* | |
1838 | * Sync out the even labels (L0, L2) for every dirty vdev. If the | |
1839 | * system dies in the middle of this process, that's OK: all of the | |
1840 | * even labels that made it to disk will be newer than any uberblock, | |
1841 | * and will therefore be considered invalid. The odd labels (L1, L3), | |
1842 | * which have not yet been touched, will still be valid. We flush | |
1843 | * the new labels to disk to ensure that all even-label updates | |
1844 | * are committed to stable storage before the uberblock update. | |
1845 | */ | |
d2734cce SD |
1846 | if ((error = vdev_label_sync_list(spa, 0, txg, flags)) != 0) { |
1847 | if ((flags & ZIO_FLAG_TRYHARD) != 0) { | |
1848 | zfs_dbgmsg("vdev_label_sync_list() returned error %d " | |
1849 | "for pool '%s' when syncing out the even labels " | |
1850 | "of dirty vdevs", error, spa_name(spa)); | |
1851 | } | |
b6fcb792 | 1852 | goto retry; |
d2734cce | 1853 | } |
34dc7c2f BB |
1854 | |
1855 | /* | |
1856 | * Sync the uberblocks to all vdevs in svd[]. | |
1857 | * If the system dies in the middle of this step, there are two cases | |
1858 | * to consider, and the on-disk state is consistent either way: | |
1859 | * | |
1860 | * (1) If none of the new uberblocks made it to disk, then the | |
1861 | * previous uberblock will be the newest, and the odd labels | |
1862 | * (which had not yet been touched) will be valid with respect | |
1863 | * to that uberblock. | |
1864 | * | |
1865 | * (2) If one or more new uberblocks made it to disk, then they | |
1866 | * will be the newest, and the even labels (which had all | |
1867 | * been successfully committed) will be valid with respect | |
1868 | * to the new uberblocks. | |
1869 | */ | |
d2734cce SD |
1870 | if ((error = vdev_uberblock_sync_list(svd, svdcount, ub, flags)) != 0) { |
1871 | if ((flags & ZIO_FLAG_TRYHARD) != 0) { | |
1872 | zfs_dbgmsg("vdev_uberblock_sync_list() returned error " | |
1873 | "%d for pool '%s'", error, spa_name(spa)); | |
1874 | } | |
b6fcb792 | 1875 | goto retry; |
d2734cce | 1876 | } |
34dc7c2f | 1877 | |
379ca9cf OF |
1878 | if (spa_multihost(spa)) |
1879 | mmp_update_uberblock(spa, ub); | |
1880 | ||
34dc7c2f BB |
1881 | /* |
1882 | * Sync out odd labels for every dirty vdev. If the system dies | |
1883 | * in the middle of this process, the even labels and the new | |
1884 | * uberblocks will suffice to open the pool. The next time | |
1885 | * the pool is opened, the first thing we'll do -- before any | |
1886 | * user data is modified -- is mark every vdev dirty so that | |
1887 | * all labels will be brought up to date. We flush the new labels | |
1888 | * to disk to ensure that all odd-label updates are committed to | |
1889 | * stable storage before the next transaction group begins. | |
1890 | */ | |
d2734cce SD |
1891 | if ((error = vdev_label_sync_list(spa, 1, txg, flags)) != 0) { |
1892 | if ((flags & ZIO_FLAG_TRYHARD) != 0) { | |
1893 | zfs_dbgmsg("vdev_label_sync_list() returned error %d " | |
1894 | "for pool '%s' when syncing out the odd labels of " | |
1895 | "dirty vdevs", error, spa_name(spa)); | |
1896 | } | |
b6fcb792 | 1897 | goto retry; |
d2734cce | 1898 | } |
b6fcb792 BB |
1899 | |
1900 | return (0); | |
34dc7c2f | 1901 | } |