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a1d477c2 MA |
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 | |
1d3ba0bf | 9 | * or https://opensource.org/licenses/CDDL-1.0. |
a1d477c2 MA |
10 | * See the License for the specific language governing permissions |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
dff71c79 | 24 | * Copyright (c) 2011, 2020 by Delphix. All rights reserved. |
fcd37b62 | 25 | * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com>. All rights reserved. |
a1d477c2 MA |
26 | */ |
27 | ||
28 | #include <sys/zfs_context.h> | |
29 | #include <sys/spa_impl.h> | |
30 | #include <sys/dmu.h> | |
31 | #include <sys/dmu_tx.h> | |
32 | #include <sys/zap.h> | |
33 | #include <sys/vdev_impl.h> | |
34 | #include <sys/metaslab.h> | |
35 | #include <sys/metaslab_impl.h> | |
36 | #include <sys/uberblock_impl.h> | |
37 | #include <sys/txg.h> | |
38 | #include <sys/avl.h> | |
39 | #include <sys/bpobj.h> | |
40 | #include <sys/dsl_pool.h> | |
41 | #include <sys/dsl_synctask.h> | |
42 | #include <sys/dsl_dir.h> | |
43 | #include <sys/arc.h> | |
44 | #include <sys/zfeature.h> | |
45 | #include <sys/vdev_indirect_births.h> | |
46 | #include <sys/vdev_indirect_mapping.h> | |
47 | #include <sys/abd.h> | |
619f0976 | 48 | #include <sys/vdev_initialize.h> |
1b939560 | 49 | #include <sys/vdev_trim.h> |
e5d1c27e | 50 | #include <sys/trace_zfs.h> |
a1d477c2 MA |
51 | |
52 | /* | |
53 | * This file contains the necessary logic to remove vdevs from a | |
54 | * storage pool. Currently, the only devices that can be removed | |
55 | * are log, cache, and spare devices; and top level vdevs from a pool | |
56 | * w/o raidz or mirrors. (Note that members of a mirror can be removed | |
57 | * by the detach operation.) | |
58 | * | |
59 | * Log vdevs are removed by evacuating them and then turning the vdev | |
60 | * into a hole vdev while holding spa config locks. | |
61 | * | |
62 | * Top level vdevs are removed and converted into an indirect vdev via | |
63 | * a multi-step process: | |
64 | * | |
65 | * - Disable allocations from this device (spa_vdev_remove_top). | |
66 | * | |
67 | * - From a new thread (spa_vdev_remove_thread), copy data from | |
68 | * the removing vdev to a different vdev. The copy happens in open | |
69 | * context (spa_vdev_copy_impl) and issues a sync task | |
70 | * (vdev_mapping_sync) so the sync thread can update the partial | |
71 | * indirect mappings in core and on disk. | |
72 | * | |
73 | * - If a free happens during a removal, it is freed from the | |
74 | * removing vdev, and if it has already been copied, from the new | |
75 | * location as well (free_from_removing_vdev). | |
76 | * | |
77 | * - After the removal is completed, the copy thread converts the vdev | |
78 | * into an indirect vdev (vdev_remove_complete) before instructing | |
79 | * the sync thread to destroy the space maps and finish the removal | |
80 | * (spa_finish_removal). | |
81 | */ | |
82 | ||
83 | typedef struct vdev_copy_arg { | |
84 | metaslab_t *vca_msp; | |
85 | uint64_t vca_outstanding_bytes; | |
7c9a4292 BB |
86 | uint64_t vca_read_error_bytes; |
87 | uint64_t vca_write_error_bytes; | |
a1d477c2 MA |
88 | kcondvar_t vca_cv; |
89 | kmutex_t vca_lock; | |
90 | } vdev_copy_arg_t; | |
91 | ||
a1d477c2 | 92 | /* |
9e052db4 MA |
93 | * The maximum amount of memory we can use for outstanding i/o while |
94 | * doing a device removal. This determines how much i/o we can have | |
95 | * in flight concurrently. | |
a1d477c2 | 96 | */ |
fdc2d303 | 97 | static const uint_t zfs_remove_max_copy_bytes = 64 * 1024 * 1024; |
a1d477c2 MA |
98 | |
99 | /* | |
100 | * The largest contiguous segment that we will attempt to allocate when | |
101 | * removing a device. This can be no larger than SPA_MAXBLOCKSIZE. If | |
102 | * there is a performance problem with attempting to allocate large blocks, | |
103 | * consider decreasing this. | |
53dce5ac MA |
104 | * |
105 | * See also the accessor function spa_remove_max_segment(). | |
a1d477c2 | 106 | */ |
fdc2d303 | 107 | uint_t zfs_remove_max_segment = SPA_MAXBLOCKSIZE; |
a1d477c2 | 108 | |
7c9a4292 BB |
109 | /* |
110 | * Ignore hard IO errors during device removal. When set if a device | |
111 | * encounters hard IO error during the removal process the removal will | |
112 | * not be cancelled. This can result in a normally recoverable block | |
113 | * becoming permanently damaged and is not recommended. | |
114 | */ | |
18168da7 | 115 | static int zfs_removal_ignore_errors = 0; |
7c9a4292 | 116 | |
0dc2f70c MA |
117 | /* |
118 | * Allow a remap segment to span free chunks of at most this size. The main | |
119 | * impact of a larger span is that we will read and write larger, more | |
120 | * contiguous chunks, with more "unnecessary" data -- trading off bandwidth | |
121 | * for iops. The value here was chosen to align with | |
122 | * zfs_vdev_read_gap_limit, which is a similar concept when doing regular | |
123 | * reads (but there's no reason it has to be the same). | |
124 | * | |
125 | * Additionally, a higher span will have the following relatively minor | |
126 | * effects: | |
127 | * - the mapping will be smaller, since one entry can cover more allocated | |
128 | * segments | |
129 | * - more of the fragmentation in the removing device will be preserved | |
130 | * - we'll do larger allocations, which may fail and fall back on smaller | |
131 | * allocations | |
132 | */ | |
fdc2d303 | 133 | uint_t vdev_removal_max_span = 32 * 1024; |
0dc2f70c | 134 | |
d2734cce SD |
135 | /* |
136 | * This is used by the test suite so that it can ensure that certain | |
137 | * actions happen while in the middle of a removal. | |
138 | */ | |
cef48f14 | 139 | int zfs_removal_suspend_progress = 0; |
d2734cce | 140 | |
a1d477c2 MA |
141 | #define VDEV_REMOVAL_ZAP_OBJS "lzap" |
142 | ||
460748d4 | 143 | static __attribute__((noreturn)) void spa_vdev_remove_thread(void *arg); |
7c9a4292 | 144 | static int spa_vdev_remove_cancel_impl(spa_t *spa); |
a1d477c2 MA |
145 | |
146 | static void | |
147 | spa_sync_removing_state(spa_t *spa, dmu_tx_t *tx) | |
148 | { | |
149 | VERIFY0(zap_update(spa->spa_dsl_pool->dp_meta_objset, | |
150 | DMU_POOL_DIRECTORY_OBJECT, | |
151 | DMU_POOL_REMOVING, sizeof (uint64_t), | |
152 | sizeof (spa->spa_removing_phys) / sizeof (uint64_t), | |
153 | &spa->spa_removing_phys, tx)); | |
154 | } | |
155 | ||
156 | static nvlist_t * | |
157 | spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) | |
158 | { | |
159 | for (int i = 0; i < count; i++) { | |
160 | uint64_t guid = | |
161 | fnvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID); | |
162 | ||
163 | if (guid == target_guid) | |
164 | return (nvpp[i]); | |
165 | } | |
166 | ||
167 | return (NULL); | |
168 | } | |
169 | ||
2a673e76 AJ |
170 | static void |
171 | vdev_activate(vdev_t *vd) | |
172 | { | |
173 | metaslab_group_t *mg = vd->vdev_mg; | |
174 | spa_t *spa = vd->vdev_spa; | |
175 | uint64_t vdev_space = spa_deflate(spa) ? | |
176 | vd->vdev_stat.vs_dspace : vd->vdev_stat.vs_space; | |
177 | ||
178 | ASSERT(!vd->vdev_islog); | |
179 | ASSERT(vd->vdev_noalloc); | |
180 | ||
181 | metaslab_group_activate(mg); | |
182 | metaslab_group_activate(vd->vdev_log_mg); | |
183 | ||
184 | ASSERT3U(spa->spa_nonallocating_dspace, >=, vdev_space); | |
185 | ||
186 | spa->spa_nonallocating_dspace -= vdev_space; | |
187 | ||
188 | vd->vdev_noalloc = B_FALSE; | |
189 | } | |
190 | ||
191 | static int | |
192 | vdev_passivate(vdev_t *vd, uint64_t *txg) | |
193 | { | |
194 | spa_t *spa = vd->vdev_spa; | |
195 | int error; | |
196 | ||
197 | ASSERT(!vd->vdev_noalloc); | |
198 | ||
199 | vdev_t *rvd = spa->spa_root_vdev; | |
200 | metaslab_group_t *mg = vd->vdev_mg; | |
201 | metaslab_class_t *normal = spa_normal_class(spa); | |
202 | if (mg->mg_class == normal) { | |
203 | /* | |
204 | * We must check that this is not the only allocating device in | |
205 | * the pool before passivating, otherwise we will not be able | |
206 | * to make progress because we can't allocate from any vdevs. | |
207 | */ | |
208 | boolean_t last = B_TRUE; | |
209 | for (uint64_t id = 0; id < rvd->vdev_children; id++) { | |
210 | vdev_t *cvd = rvd->vdev_child[id]; | |
211 | ||
212 | if (cvd == vd || | |
213 | cvd->vdev_ops == &vdev_indirect_ops) | |
214 | continue; | |
215 | ||
216 | metaslab_class_t *mc = cvd->vdev_mg->mg_class; | |
217 | if (mc != normal) | |
218 | continue; | |
219 | ||
220 | if (!cvd->vdev_noalloc) { | |
221 | last = B_FALSE; | |
222 | break; | |
223 | } | |
224 | } | |
225 | if (last) | |
226 | return (SET_ERROR(EINVAL)); | |
227 | } | |
228 | ||
229 | metaslab_group_passivate(mg); | |
230 | ASSERT(!vd->vdev_islog); | |
231 | metaslab_group_passivate(vd->vdev_log_mg); | |
232 | ||
233 | /* | |
234 | * Wait for the youngest allocations and frees to sync, | |
235 | * and then wait for the deferral of those frees to finish. | |
236 | */ | |
237 | spa_vdev_config_exit(spa, NULL, | |
238 | *txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); | |
239 | ||
240 | /* | |
241 | * We must ensure that no "stubby" log blocks are allocated | |
242 | * on the device to be removed. These blocks could be | |
243 | * written at any time, including while we are in the middle | |
244 | * of copying them. | |
245 | */ | |
246 | error = spa_reset_logs(spa); | |
247 | ||
248 | *txg = spa_vdev_config_enter(spa); | |
249 | ||
250 | if (error != 0) { | |
251 | metaslab_group_activate(mg); | |
252 | ASSERT(!vd->vdev_islog); | |
253 | if (vd->vdev_log_mg != NULL) | |
254 | metaslab_group_activate(vd->vdev_log_mg); | |
255 | return (error); | |
256 | } | |
257 | ||
258 | spa->spa_nonallocating_dspace += spa_deflate(spa) ? | |
259 | vd->vdev_stat.vs_dspace : vd->vdev_stat.vs_space; | |
260 | vd->vdev_noalloc = B_TRUE; | |
261 | ||
262 | return (0); | |
263 | } | |
264 | ||
265 | /* | |
266 | * Turn off allocations for a top-level device from the pool. | |
267 | * | |
268 | * Turning off allocations for a top-level device can take a significant | |
269 | * amount of time. As a result we use the spa_vdev_config_[enter/exit] | |
270 | * functions which allow us to grab and release the spa_config_lock while | |
271 | * still holding the namespace lock. During each step the configuration | |
272 | * is synced out. | |
273 | */ | |
274 | int | |
275 | spa_vdev_noalloc(spa_t *spa, uint64_t guid) | |
276 | { | |
277 | vdev_t *vd; | |
278 | uint64_t txg; | |
279 | int error = 0; | |
280 | ||
281 | ASSERT(!MUTEX_HELD(&spa_namespace_lock)); | |
282 | ASSERT(spa_writeable(spa)); | |
283 | ||
284 | txg = spa_vdev_enter(spa); | |
285 | ||
286 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
287 | ||
288 | vd = spa_lookup_by_guid(spa, guid, B_FALSE); | |
289 | ||
290 | if (vd == NULL) | |
291 | error = SET_ERROR(ENOENT); | |
292 | else if (vd->vdev_mg == NULL) | |
293 | error = SET_ERROR(ZFS_ERR_VDEV_NOTSUP); | |
294 | else if (!vd->vdev_noalloc) | |
295 | error = vdev_passivate(vd, &txg); | |
296 | ||
297 | if (error == 0) { | |
298 | vdev_dirty_leaves(vd, VDD_DTL, txg); | |
299 | vdev_config_dirty(vd); | |
300 | } | |
301 | ||
302 | error = spa_vdev_exit(spa, NULL, txg, error); | |
303 | ||
304 | return (error); | |
305 | } | |
306 | ||
307 | int | |
308 | spa_vdev_alloc(spa_t *spa, uint64_t guid) | |
309 | { | |
310 | vdev_t *vd; | |
311 | uint64_t txg; | |
312 | int error = 0; | |
313 | ||
314 | ASSERT(!MUTEX_HELD(&spa_namespace_lock)); | |
315 | ASSERT(spa_writeable(spa)); | |
316 | ||
317 | txg = spa_vdev_enter(spa); | |
318 | ||
319 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
320 | ||
321 | vd = spa_lookup_by_guid(spa, guid, B_FALSE); | |
322 | ||
323 | if (vd == NULL) | |
324 | error = SET_ERROR(ENOENT); | |
325 | else if (vd->vdev_mg == NULL) | |
326 | error = SET_ERROR(ZFS_ERR_VDEV_NOTSUP); | |
327 | else if (!vd->vdev_removing) | |
328 | vdev_activate(vd); | |
329 | ||
330 | if (error == 0) { | |
331 | vdev_dirty_leaves(vd, VDD_DTL, txg); | |
332 | vdev_config_dirty(vd); | |
333 | } | |
334 | ||
335 | (void) spa_vdev_exit(spa, NULL, txg, error); | |
336 | ||
337 | return (error); | |
338 | } | |
339 | ||
a1d477c2 | 340 | static void |
a926aab9 AZ |
341 | spa_vdev_remove_aux(nvlist_t *config, const char *name, nvlist_t **dev, |
342 | int count, nvlist_t *dev_to_remove) | |
a1d477c2 MA |
343 | { |
344 | nvlist_t **newdev = NULL; | |
345 | ||
346 | if (count > 1) | |
347 | newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); | |
348 | ||
349 | for (int i = 0, j = 0; i < count; i++) { | |
350 | if (dev[i] == dev_to_remove) | |
351 | continue; | |
352 | VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); | |
353 | } | |
354 | ||
355 | VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); | |
795075e6 PD |
356 | fnvlist_add_nvlist_array(config, name, (const nvlist_t * const *)newdev, |
357 | count - 1); | |
a1d477c2 MA |
358 | |
359 | for (int i = 0; i < count - 1; i++) | |
360 | nvlist_free(newdev[i]); | |
361 | ||
362 | if (count > 1) | |
363 | kmem_free(newdev, (count - 1) * sizeof (void *)); | |
364 | } | |
365 | ||
366 | static spa_vdev_removal_t * | |
367 | spa_vdev_removal_create(vdev_t *vd) | |
368 | { | |
369 | spa_vdev_removal_t *svr = kmem_zalloc(sizeof (*svr), KM_SLEEP); | |
370 | mutex_init(&svr->svr_lock, NULL, MUTEX_DEFAULT, NULL); | |
371 | cv_init(&svr->svr_cv, NULL, CV_DEFAULT, NULL); | |
ca577779 | 372 | svr->svr_allocd_segs = range_tree_create(NULL, RANGE_SEG64, NULL, 0, 0); |
9e052db4 | 373 | svr->svr_vdev_id = vd->vdev_id; |
a1d477c2 MA |
374 | |
375 | for (int i = 0; i < TXG_SIZE; i++) { | |
ca577779 PD |
376 | svr->svr_frees[i] = range_tree_create(NULL, RANGE_SEG64, NULL, |
377 | 0, 0); | |
a1d477c2 MA |
378 | list_create(&svr->svr_new_segments[i], |
379 | sizeof (vdev_indirect_mapping_entry_t), | |
380 | offsetof(vdev_indirect_mapping_entry_t, vime_node)); | |
381 | } | |
382 | ||
383 | return (svr); | |
384 | } | |
385 | ||
386 | void | |
387 | spa_vdev_removal_destroy(spa_vdev_removal_t *svr) | |
388 | { | |
389 | for (int i = 0; i < TXG_SIZE; i++) { | |
390 | ASSERT0(svr->svr_bytes_done[i]); | |
391 | ASSERT0(svr->svr_max_offset_to_sync[i]); | |
392 | range_tree_destroy(svr->svr_frees[i]); | |
393 | list_destroy(&svr->svr_new_segments[i]); | |
394 | } | |
395 | ||
396 | range_tree_destroy(svr->svr_allocd_segs); | |
397 | mutex_destroy(&svr->svr_lock); | |
398 | cv_destroy(&svr->svr_cv); | |
399 | kmem_free(svr, sizeof (*svr)); | |
400 | } | |
401 | ||
402 | /* | |
403 | * This is called as a synctask in the txg in which we will mark this vdev | |
404 | * as removing (in the config stored in the MOS). | |
405 | * | |
406 | * It begins the evacuation of a toplevel vdev by: | |
407 | * - initializing the spa_removing_phys which tracks this removal | |
408 | * - computing the amount of space to remove for accounting purposes | |
409 | * - dirtying all dbufs in the spa_config_object | |
410 | * - creating the spa_vdev_removal | |
411 | * - starting the spa_vdev_remove_thread | |
412 | */ | |
413 | static void | |
414 | vdev_remove_initiate_sync(void *arg, dmu_tx_t *tx) | |
415 | { | |
9e052db4 MA |
416 | int vdev_id = (uintptr_t)arg; |
417 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
418 | vdev_t *vd = vdev_lookup_top(spa, vdev_id); | |
a1d477c2 | 419 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; |
a1d477c2 MA |
420 | objset_t *mos = spa->spa_dsl_pool->dp_meta_objset; |
421 | spa_vdev_removal_t *svr = NULL; | |
2a8ba608 | 422 | uint64_t txg __maybe_unused = dmu_tx_get_txg(tx); |
a1d477c2 | 423 | |
b2255edc | 424 | ASSERT0(vdev_get_nparity(vd)); |
a1d477c2 MA |
425 | svr = spa_vdev_removal_create(vd); |
426 | ||
427 | ASSERT(vd->vdev_removing); | |
428 | ASSERT3P(vd->vdev_indirect_mapping, ==, NULL); | |
429 | ||
430 | spa_feature_incr(spa, SPA_FEATURE_DEVICE_REMOVAL, tx); | |
431 | if (spa_feature_is_enabled(spa, SPA_FEATURE_OBSOLETE_COUNTS)) { | |
432 | /* | |
433 | * By activating the OBSOLETE_COUNTS feature, we prevent | |
434 | * the pool from being downgraded and ensure that the | |
435 | * refcounts are precise. | |
436 | */ | |
437 | spa_feature_incr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); | |
438 | uint64_t one = 1; | |
439 | VERIFY0(zap_add(spa->spa_meta_objset, vd->vdev_top_zap, | |
440 | VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE, sizeof (one), 1, | |
441 | &one, tx)); | |
2a8ba608 | 442 | boolean_t are_precise __maybe_unused; |
27f80e85 BB |
443 | ASSERT0(vdev_obsolete_counts_are_precise(vd, &are_precise)); |
444 | ASSERT3B(are_precise, ==, B_TRUE); | |
a1d477c2 MA |
445 | } |
446 | ||
447 | vic->vic_mapping_object = vdev_indirect_mapping_alloc(mos, tx); | |
448 | vd->vdev_indirect_mapping = | |
449 | vdev_indirect_mapping_open(mos, vic->vic_mapping_object); | |
450 | vic->vic_births_object = vdev_indirect_births_alloc(mos, tx); | |
451 | vd->vdev_indirect_births = | |
452 | vdev_indirect_births_open(mos, vic->vic_births_object); | |
453 | spa->spa_removing_phys.sr_removing_vdev = vd->vdev_id; | |
454 | spa->spa_removing_phys.sr_start_time = gethrestime_sec(); | |
455 | spa->spa_removing_phys.sr_end_time = 0; | |
456 | spa->spa_removing_phys.sr_state = DSS_SCANNING; | |
457 | spa->spa_removing_phys.sr_to_copy = 0; | |
458 | spa->spa_removing_phys.sr_copied = 0; | |
459 | ||
460 | /* | |
461 | * Note: We can't use vdev_stat's vs_alloc for sr_to_copy, because | |
462 | * there may be space in the defer tree, which is free, but still | |
463 | * counted in vs_alloc. | |
464 | */ | |
465 | for (uint64_t i = 0; i < vd->vdev_ms_count; i++) { | |
466 | metaslab_t *ms = vd->vdev_ms[i]; | |
467 | if (ms->ms_sm == NULL) | |
468 | continue; | |
469 | ||
a1d477c2 | 470 | spa->spa_removing_phys.sr_to_copy += |
425d3237 | 471 | metaslab_allocated_space(ms); |
a1d477c2 MA |
472 | |
473 | /* | |
474 | * Space which we are freeing this txg does not need to | |
475 | * be copied. | |
476 | */ | |
477 | spa->spa_removing_phys.sr_to_copy -= | |
d2734cce | 478 | range_tree_space(ms->ms_freeing); |
a1d477c2 | 479 | |
d2734cce | 480 | ASSERT0(range_tree_space(ms->ms_freed)); |
a1d477c2 | 481 | for (int t = 0; t < TXG_SIZE; t++) |
d2734cce | 482 | ASSERT0(range_tree_space(ms->ms_allocating[t])); |
a1d477c2 MA |
483 | } |
484 | ||
485 | /* | |
486 | * Sync tasks are called before metaslab_sync(), so there should | |
487 | * be no already-synced metaslabs in the TXG_CLEAN list. | |
488 | */ | |
489 | ASSERT3P(txg_list_head(&vd->vdev_ms_list, TXG_CLEAN(txg)), ==, NULL); | |
490 | ||
491 | spa_sync_removing_state(spa, tx); | |
492 | ||
493 | /* | |
494 | * All blocks that we need to read the most recent mapping must be | |
495 | * stored on concrete vdevs. Therefore, we must dirty anything that | |
496 | * is read before spa_remove_init(). Specifically, the | |
497 | * spa_config_object. (Note that although we already modified the | |
498 | * spa_config_object in spa_sync_removing_state, that may not have | |
499 | * modified all blocks of the object.) | |
500 | */ | |
501 | dmu_object_info_t doi; | |
502 | VERIFY0(dmu_object_info(mos, DMU_POOL_DIRECTORY_OBJECT, &doi)); | |
503 | for (uint64_t offset = 0; offset < doi.doi_max_offset; ) { | |
504 | dmu_buf_t *dbuf; | |
505 | VERIFY0(dmu_buf_hold(mos, DMU_POOL_DIRECTORY_OBJECT, | |
506 | offset, FTAG, &dbuf, 0)); | |
507 | dmu_buf_will_dirty(dbuf, tx); | |
508 | offset += dbuf->db_size; | |
509 | dmu_buf_rele(dbuf, FTAG); | |
510 | } | |
511 | ||
512 | /* | |
513 | * Now that we've allocated the im_object, dirty the vdev to ensure | |
514 | * that the object gets written to the config on disk. | |
515 | */ | |
516 | vdev_config_dirty(vd); | |
517 | ||
a887d653 | 518 | zfs_dbgmsg("starting removal thread for vdev %llu (%px) in txg %llu " |
8e739b2c RE |
519 | "im_obj=%llu", (u_longlong_t)vd->vdev_id, vd, |
520 | (u_longlong_t)dmu_tx_get_txg(tx), | |
521 | (u_longlong_t)vic->vic_mapping_object); | |
a1d477c2 MA |
522 | |
523 | spa_history_log_internal(spa, "vdev remove started", tx, | |
74756182 | 524 | "%s vdev %llu %s", spa_name(spa), (u_longlong_t)vd->vdev_id, |
a1d477c2 MA |
525 | (vd->vdev_path != NULL) ? vd->vdev_path : "-"); |
526 | /* | |
527 | * Setting spa_vdev_removal causes subsequent frees to call | |
528 | * free_from_removing_vdev(). Note that we don't need any locking | |
529 | * because we are the sync thread, and metaslab_free_impl() is only | |
530 | * called from syncing context (potentially from a zio taskq thread, | |
531 | * but in any case only when there are outstanding free i/os, which | |
532 | * there are not). | |
533 | */ | |
534 | ASSERT3P(spa->spa_vdev_removal, ==, NULL); | |
535 | spa->spa_vdev_removal = svr; | |
536 | svr->svr_thread = thread_create(NULL, 0, | |
9e052db4 | 537 | spa_vdev_remove_thread, spa, 0, &p0, TS_RUN, minclsyspri); |
a1d477c2 MA |
538 | } |
539 | ||
540 | /* | |
541 | * When we are opening a pool, we must read the mapping for each | |
542 | * indirect vdev in order from most recently removed to least | |
543 | * recently removed. We do this because the blocks for the mapping | |
544 | * of older indirect vdevs may be stored on more recently removed vdevs. | |
545 | * In order to read each indirect mapping object, we must have | |
546 | * initialized all more recently removed vdevs. | |
547 | */ | |
548 | int | |
549 | spa_remove_init(spa_t *spa) | |
550 | { | |
551 | int error; | |
552 | ||
553 | error = zap_lookup(spa->spa_dsl_pool->dp_meta_objset, | |
554 | DMU_POOL_DIRECTORY_OBJECT, | |
555 | DMU_POOL_REMOVING, sizeof (uint64_t), | |
556 | sizeof (spa->spa_removing_phys) / sizeof (uint64_t), | |
557 | &spa->spa_removing_phys); | |
558 | ||
559 | if (error == ENOENT) { | |
560 | spa->spa_removing_phys.sr_state = DSS_NONE; | |
561 | spa->spa_removing_phys.sr_removing_vdev = -1; | |
562 | spa->spa_removing_phys.sr_prev_indirect_vdev = -1; | |
20507534 | 563 | spa->spa_indirect_vdevs_loaded = B_TRUE; |
a1d477c2 MA |
564 | return (0); |
565 | } else if (error != 0) { | |
566 | return (error); | |
567 | } | |
568 | ||
569 | if (spa->spa_removing_phys.sr_state == DSS_SCANNING) { | |
570 | /* | |
571 | * We are currently removing a vdev. Create and | |
572 | * initialize a spa_vdev_removal_t from the bonus | |
573 | * buffer of the removing vdevs vdev_im_object, and | |
574 | * initialize its partial mapping. | |
575 | */ | |
576 | spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); | |
577 | vdev_t *vd = vdev_lookup_top(spa, | |
578 | spa->spa_removing_phys.sr_removing_vdev); | |
a1d477c2 | 579 | |
9e052db4 MA |
580 | if (vd == NULL) { |
581 | spa_config_exit(spa, SCL_STATE, FTAG); | |
a1d477c2 | 582 | return (EINVAL); |
9e052db4 | 583 | } |
a1d477c2 MA |
584 | |
585 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; | |
586 | ||
587 | ASSERT(vdev_is_concrete(vd)); | |
588 | spa_vdev_removal_t *svr = spa_vdev_removal_create(vd); | |
9e052db4 MA |
589 | ASSERT3U(svr->svr_vdev_id, ==, vd->vdev_id); |
590 | ASSERT(vd->vdev_removing); | |
a1d477c2 MA |
591 | |
592 | vd->vdev_indirect_mapping = vdev_indirect_mapping_open( | |
593 | spa->spa_meta_objset, vic->vic_mapping_object); | |
594 | vd->vdev_indirect_births = vdev_indirect_births_open( | |
595 | spa->spa_meta_objset, vic->vic_births_object); | |
9e052db4 | 596 | spa_config_exit(spa, SCL_STATE, FTAG); |
a1d477c2 MA |
597 | |
598 | spa->spa_vdev_removal = svr; | |
599 | } | |
600 | ||
601 | spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); | |
602 | uint64_t indirect_vdev_id = | |
603 | spa->spa_removing_phys.sr_prev_indirect_vdev; | |
604 | while (indirect_vdev_id != UINT64_MAX) { | |
605 | vdev_t *vd = vdev_lookup_top(spa, indirect_vdev_id); | |
606 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; | |
607 | ||
608 | ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops); | |
609 | vd->vdev_indirect_mapping = vdev_indirect_mapping_open( | |
610 | spa->spa_meta_objset, vic->vic_mapping_object); | |
611 | vd->vdev_indirect_births = vdev_indirect_births_open( | |
612 | spa->spa_meta_objset, vic->vic_births_object); | |
613 | ||
614 | indirect_vdev_id = vic->vic_prev_indirect_vdev; | |
615 | } | |
616 | spa_config_exit(spa, SCL_STATE, FTAG); | |
617 | ||
618 | /* | |
619 | * Now that we've loaded all the indirect mappings, we can allow | |
620 | * reads from other blocks (e.g. via predictive prefetch). | |
621 | */ | |
622 | spa->spa_indirect_vdevs_loaded = B_TRUE; | |
623 | return (0); | |
624 | } | |
625 | ||
626 | void | |
627 | spa_restart_removal(spa_t *spa) | |
628 | { | |
629 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
630 | ||
631 | if (svr == NULL) | |
632 | return; | |
633 | ||
634 | /* | |
635 | * In general when this function is called there is no | |
636 | * removal thread running. The only scenario where this | |
637 | * is not true is during spa_import() where this function | |
638 | * is called twice [once from spa_import_impl() and | |
639 | * spa_async_resume()]. Thus, in the scenario where we | |
640 | * import a pool that has an ongoing removal we don't | |
641 | * want to spawn a second thread. | |
642 | */ | |
643 | if (svr->svr_thread != NULL) | |
644 | return; | |
645 | ||
646 | if (!spa_writeable(spa)) | |
647 | return; | |
648 | ||
8e739b2c RE |
649 | zfs_dbgmsg("restarting removal of %llu", |
650 | (u_longlong_t)svr->svr_vdev_id); | |
9e052db4 | 651 | svr->svr_thread = thread_create(NULL, 0, spa_vdev_remove_thread, spa, |
a1d477c2 MA |
652 | 0, &p0, TS_RUN, minclsyspri); |
653 | } | |
654 | ||
655 | /* | |
656 | * Process freeing from a device which is in the middle of being removed. | |
657 | * We must handle this carefully so that we attempt to copy freed data, | |
658 | * and we correctly free already-copied data. | |
659 | */ | |
660 | void | |
d2734cce | 661 | free_from_removing_vdev(vdev_t *vd, uint64_t offset, uint64_t size) |
a1d477c2 MA |
662 | { |
663 | spa_t *spa = vd->vdev_spa; | |
664 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
665 | vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; | |
d2734cce | 666 | uint64_t txg = spa_syncing_txg(spa); |
a1d477c2 MA |
667 | uint64_t max_offset_yet = 0; |
668 | ||
669 | ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0); | |
670 | ASSERT3U(vd->vdev_indirect_config.vic_mapping_object, ==, | |
671 | vdev_indirect_mapping_object(vim)); | |
9e052db4 | 672 | ASSERT3U(vd->vdev_id, ==, svr->svr_vdev_id); |
a1d477c2 MA |
673 | |
674 | mutex_enter(&svr->svr_lock); | |
675 | ||
676 | /* | |
677 | * Remove the segment from the removing vdev's spacemap. This | |
678 | * ensures that we will not attempt to copy this space (if the | |
679 | * removal thread has not yet visited it), and also ensures | |
680 | * that we know what is actually allocated on the new vdevs | |
681 | * (needed if we cancel the removal). | |
682 | * | |
683 | * Note: we must do the metaslab_free_concrete() with the svr_lock | |
684 | * held, so that the remove_thread can not load this metaslab and then | |
685 | * visit this offset between the time that we metaslab_free_concrete() | |
686 | * and when we check to see if it has been visited. | |
d2734cce SD |
687 | * |
688 | * Note: The checkpoint flag is set to false as having/taking | |
689 | * a checkpoint and removing a device can't happen at the same | |
690 | * time. | |
a1d477c2 | 691 | */ |
d2734cce SD |
692 | ASSERT(!spa_has_checkpoint(spa)); |
693 | metaslab_free_concrete(vd, offset, size, B_FALSE); | |
a1d477c2 MA |
694 | |
695 | uint64_t synced_size = 0; | |
696 | uint64_t synced_offset = 0; | |
697 | uint64_t max_offset_synced = vdev_indirect_mapping_max_offset(vim); | |
698 | if (offset < max_offset_synced) { | |
699 | /* | |
700 | * The mapping for this offset is already on disk. | |
701 | * Free from the new location. | |
702 | * | |
703 | * Note that we use svr_max_synced_offset because it is | |
704 | * updated atomically with respect to the in-core mapping. | |
705 | * By contrast, vim_max_offset is not. | |
706 | * | |
707 | * This block may be split between a synced entry and an | |
708 | * in-flight or unvisited entry. Only process the synced | |
709 | * portion of it here. | |
710 | */ | |
711 | synced_size = MIN(size, max_offset_synced - offset); | |
712 | synced_offset = offset; | |
713 | ||
714 | ASSERT3U(max_offset_yet, <=, max_offset_synced); | |
715 | max_offset_yet = max_offset_synced; | |
716 | ||
717 | DTRACE_PROBE3(remove__free__synced, | |
718 | spa_t *, spa, | |
719 | uint64_t, offset, | |
720 | uint64_t, synced_size); | |
721 | ||
722 | size -= synced_size; | |
723 | offset += synced_size; | |
724 | } | |
725 | ||
726 | /* | |
727 | * Look at all in-flight txgs starting from the currently syncing one | |
728 | * and see if a section of this free is being copied. By starting from | |
729 | * this txg and iterating forward, we might find that this region | |
730 | * was copied in two different txgs and handle it appropriately. | |
731 | */ | |
732 | for (int i = 0; i < TXG_CONCURRENT_STATES; i++) { | |
733 | int txgoff = (txg + i) & TXG_MASK; | |
734 | if (size > 0 && offset < svr->svr_max_offset_to_sync[txgoff]) { | |
735 | /* | |
736 | * The mapping for this offset is in flight, and | |
737 | * will be synced in txg+i. | |
738 | */ | |
739 | uint64_t inflight_size = MIN(size, | |
740 | svr->svr_max_offset_to_sync[txgoff] - offset); | |
741 | ||
742 | DTRACE_PROBE4(remove__free__inflight, | |
743 | spa_t *, spa, | |
744 | uint64_t, offset, | |
745 | uint64_t, inflight_size, | |
746 | uint64_t, txg + i); | |
747 | ||
748 | /* | |
749 | * We copy data in order of increasing offset. | |
750 | * Therefore the max_offset_to_sync[] must increase | |
751 | * (or be zero, indicating that nothing is being | |
752 | * copied in that txg). | |
753 | */ | |
754 | if (svr->svr_max_offset_to_sync[txgoff] != 0) { | |
755 | ASSERT3U(svr->svr_max_offset_to_sync[txgoff], | |
756 | >=, max_offset_yet); | |
757 | max_offset_yet = | |
758 | svr->svr_max_offset_to_sync[txgoff]; | |
759 | } | |
760 | ||
761 | /* | |
762 | * We've already committed to copying this segment: | |
763 | * we have allocated space elsewhere in the pool for | |
764 | * it and have an IO outstanding to copy the data. We | |
765 | * cannot free the space before the copy has | |
766 | * completed, or else the copy IO might overwrite any | |
767 | * new data. To free that space, we record the | |
768 | * segment in the appropriate svr_frees tree and free | |
769 | * the mapped space later, in the txg where we have | |
770 | * completed the copy and synced the mapping (see | |
771 | * vdev_mapping_sync). | |
772 | */ | |
773 | range_tree_add(svr->svr_frees[txgoff], | |
774 | offset, inflight_size); | |
775 | size -= inflight_size; | |
776 | offset += inflight_size; | |
777 | ||
778 | /* | |
779 | * This space is already accounted for as being | |
780 | * done, because it is being copied in txg+i. | |
781 | * However, if i!=0, then it is being copied in | |
782 | * a future txg. If we crash after this txg | |
783 | * syncs but before txg+i syncs, then the space | |
784 | * will be free. Therefore we must account | |
785 | * for the space being done in *this* txg | |
786 | * (when it is freed) rather than the future txg | |
787 | * (when it will be copied). | |
788 | */ | |
789 | ASSERT3U(svr->svr_bytes_done[txgoff], >=, | |
790 | inflight_size); | |
791 | svr->svr_bytes_done[txgoff] -= inflight_size; | |
792 | svr->svr_bytes_done[txg & TXG_MASK] += inflight_size; | |
793 | } | |
794 | } | |
795 | ASSERT0(svr->svr_max_offset_to_sync[TXG_CLEAN(txg) & TXG_MASK]); | |
796 | ||
797 | if (size > 0) { | |
798 | /* | |
799 | * The copy thread has not yet visited this offset. Ensure | |
800 | * that it doesn't. | |
801 | */ | |
802 | ||
803 | DTRACE_PROBE3(remove__free__unvisited, | |
804 | spa_t *, spa, | |
805 | uint64_t, offset, | |
806 | uint64_t, size); | |
807 | ||
808 | if (svr->svr_allocd_segs != NULL) | |
809 | range_tree_clear(svr->svr_allocd_segs, offset, size); | |
810 | ||
811 | /* | |
812 | * Since we now do not need to copy this data, for | |
813 | * accounting purposes we have done our job and can count | |
814 | * it as completed. | |
815 | */ | |
816 | svr->svr_bytes_done[txg & TXG_MASK] += size; | |
817 | } | |
818 | mutex_exit(&svr->svr_lock); | |
819 | ||
820 | /* | |
821 | * Now that we have dropped svr_lock, process the synced portion | |
822 | * of this free. | |
823 | */ | |
824 | if (synced_size > 0) { | |
d2734cce SD |
825 | vdev_indirect_mark_obsolete(vd, synced_offset, synced_size); |
826 | ||
a1d477c2 MA |
827 | /* |
828 | * Note: this can only be called from syncing context, | |
829 | * and the vdev_indirect_mapping is only changed from the | |
830 | * sync thread, so we don't need svr_lock while doing | |
831 | * metaslab_free_impl_cb. | |
832 | */ | |
d2734cce | 833 | boolean_t checkpoint = B_FALSE; |
a1d477c2 | 834 | vdev_indirect_ops.vdev_op_remap(vd, synced_offset, synced_size, |
d2734cce | 835 | metaslab_free_impl_cb, &checkpoint); |
a1d477c2 MA |
836 | } |
837 | } | |
838 | ||
839 | /* | |
840 | * Stop an active removal and update the spa_removing phys. | |
841 | */ | |
842 | static void | |
843 | spa_finish_removal(spa_t *spa, dsl_scan_state_t state, dmu_tx_t *tx) | |
844 | { | |
845 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
846 | ASSERT3U(dmu_tx_get_txg(tx), ==, spa_syncing_txg(spa)); | |
847 | ||
848 | /* Ensure the removal thread has completed before we free the svr. */ | |
849 | spa_vdev_remove_suspend(spa); | |
850 | ||
851 | ASSERT(state == DSS_FINISHED || state == DSS_CANCELED); | |
852 | ||
853 | if (state == DSS_FINISHED) { | |
854 | spa_removing_phys_t *srp = &spa->spa_removing_phys; | |
9e052db4 | 855 | vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id); |
a1d477c2 MA |
856 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; |
857 | ||
c40a1124 | 858 | if (srp->sr_prev_indirect_vdev != -1) { |
a1d477c2 MA |
859 | vdev_t *pvd; |
860 | pvd = vdev_lookup_top(spa, | |
861 | srp->sr_prev_indirect_vdev); | |
862 | ASSERT3P(pvd->vdev_ops, ==, &vdev_indirect_ops); | |
863 | } | |
864 | ||
865 | vic->vic_prev_indirect_vdev = srp->sr_prev_indirect_vdev; | |
866 | srp->sr_prev_indirect_vdev = vd->vdev_id; | |
867 | } | |
868 | spa->spa_removing_phys.sr_state = state; | |
869 | spa->spa_removing_phys.sr_end_time = gethrestime_sec(); | |
870 | ||
871 | spa->spa_vdev_removal = NULL; | |
872 | spa_vdev_removal_destroy(svr); | |
873 | ||
874 | spa_sync_removing_state(spa, tx); | |
e60e158e | 875 | spa_notify_waiters(spa); |
a1d477c2 MA |
876 | |
877 | vdev_config_dirty(spa->spa_root_vdev); | |
878 | } | |
879 | ||
880 | static void | |
881 | free_mapped_segment_cb(void *arg, uint64_t offset, uint64_t size) | |
882 | { | |
883 | vdev_t *vd = arg; | |
d2734cce SD |
884 | vdev_indirect_mark_obsolete(vd, offset, size); |
885 | boolean_t checkpoint = B_FALSE; | |
a1d477c2 | 886 | vdev_indirect_ops.vdev_op_remap(vd, offset, size, |
d2734cce | 887 | metaslab_free_impl_cb, &checkpoint); |
a1d477c2 MA |
888 | } |
889 | ||
890 | /* | |
891 | * On behalf of the removal thread, syncs an incremental bit more of | |
892 | * the indirect mapping to disk and updates the in-memory mapping. | |
893 | * Called as a sync task in every txg that the removal thread makes progress. | |
894 | */ | |
895 | static void | |
896 | vdev_mapping_sync(void *arg, dmu_tx_t *tx) | |
897 | { | |
898 | spa_vdev_removal_t *svr = arg; | |
899 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
9e052db4 | 900 | vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id); |
2a8ba608 | 901 | vdev_indirect_config_t *vic __maybe_unused = &vd->vdev_indirect_config; |
a1d477c2 MA |
902 | uint64_t txg = dmu_tx_get_txg(tx); |
903 | vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; | |
904 | ||
905 | ASSERT(vic->vic_mapping_object != 0); | |
906 | ASSERT3U(txg, ==, spa_syncing_txg(spa)); | |
907 | ||
908 | vdev_indirect_mapping_add_entries(vim, | |
909 | &svr->svr_new_segments[txg & TXG_MASK], tx); | |
910 | vdev_indirect_births_add_entry(vd->vdev_indirect_births, | |
911 | vdev_indirect_mapping_max_offset(vim), dmu_tx_get_txg(tx), tx); | |
912 | ||
913 | /* | |
914 | * Free the copied data for anything that was freed while the | |
915 | * mapping entries were in flight. | |
916 | */ | |
917 | mutex_enter(&svr->svr_lock); | |
918 | range_tree_vacate(svr->svr_frees[txg & TXG_MASK], | |
919 | free_mapped_segment_cb, vd); | |
920 | ASSERT3U(svr->svr_max_offset_to_sync[txg & TXG_MASK], >=, | |
921 | vdev_indirect_mapping_max_offset(vim)); | |
922 | svr->svr_max_offset_to_sync[txg & TXG_MASK] = 0; | |
923 | mutex_exit(&svr->svr_lock); | |
924 | ||
925 | spa_sync_removing_state(spa, tx); | |
926 | } | |
927 | ||
0dc2f70c MA |
928 | typedef struct vdev_copy_segment_arg { |
929 | spa_t *vcsa_spa; | |
930 | dva_t *vcsa_dest_dva; | |
931 | uint64_t vcsa_txg; | |
932 | range_tree_t *vcsa_obsolete_segs; | |
933 | } vdev_copy_segment_arg_t; | |
934 | ||
935 | static void | |
936 | unalloc_seg(void *arg, uint64_t start, uint64_t size) | |
937 | { | |
938 | vdev_copy_segment_arg_t *vcsa = arg; | |
939 | spa_t *spa = vcsa->vcsa_spa; | |
940 | blkptr_t bp = { { { {0} } } }; | |
941 | ||
942 | BP_SET_BIRTH(&bp, TXG_INITIAL, TXG_INITIAL); | |
943 | BP_SET_LSIZE(&bp, size); | |
944 | BP_SET_PSIZE(&bp, size); | |
945 | BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF); | |
946 | BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_OFF); | |
947 | BP_SET_TYPE(&bp, DMU_OT_NONE); | |
948 | BP_SET_LEVEL(&bp, 0); | |
949 | BP_SET_DEDUP(&bp, 0); | |
950 | BP_SET_BYTEORDER(&bp, ZFS_HOST_BYTEORDER); | |
951 | ||
952 | DVA_SET_VDEV(&bp.blk_dva[0], DVA_GET_VDEV(vcsa->vcsa_dest_dva)); | |
953 | DVA_SET_OFFSET(&bp.blk_dva[0], | |
954 | DVA_GET_OFFSET(vcsa->vcsa_dest_dva) + start); | |
955 | DVA_SET_ASIZE(&bp.blk_dva[0], size); | |
956 | ||
957 | zio_free(spa, vcsa->vcsa_txg, &bp); | |
958 | } | |
959 | ||
9e052db4 MA |
960 | /* |
961 | * All reads and writes associated with a call to spa_vdev_copy_segment() | |
962 | * are done. | |
963 | */ | |
964 | static void | |
0dc2f70c | 965 | spa_vdev_copy_segment_done(zio_t *zio) |
9e052db4 | 966 | { |
0dc2f70c MA |
967 | vdev_copy_segment_arg_t *vcsa = zio->io_private; |
968 | ||
969 | range_tree_vacate(vcsa->vcsa_obsolete_segs, | |
970 | unalloc_seg, vcsa); | |
971 | range_tree_destroy(vcsa->vcsa_obsolete_segs); | |
972 | kmem_free(vcsa, sizeof (*vcsa)); | |
973 | ||
9e052db4 MA |
974 | spa_config_exit(zio->io_spa, SCL_STATE, zio->io_spa); |
975 | } | |
976 | ||
977 | /* | |
978 | * The write of the new location is done. | |
979 | */ | |
a1d477c2 MA |
980 | static void |
981 | spa_vdev_copy_segment_write_done(zio_t *zio) | |
982 | { | |
9e052db4 MA |
983 | vdev_copy_arg_t *vca = zio->io_private; |
984 | ||
a1d477c2 MA |
985 | abd_free(zio->io_abd); |
986 | ||
987 | mutex_enter(&vca->vca_lock); | |
988 | vca->vca_outstanding_bytes -= zio->io_size; | |
7c9a4292 BB |
989 | |
990 | if (zio->io_error != 0) | |
991 | vca->vca_write_error_bytes += zio->io_size; | |
992 | ||
a1d477c2 MA |
993 | cv_signal(&vca->vca_cv); |
994 | mutex_exit(&vca->vca_lock); | |
a1d477c2 MA |
995 | } |
996 | ||
9e052db4 MA |
997 | /* |
998 | * The read of the old location is done. The parent zio is the write to | |
999 | * the new location. Allow it to start. | |
1000 | */ | |
a1d477c2 MA |
1001 | static void |
1002 | spa_vdev_copy_segment_read_done(zio_t *zio) | |
1003 | { | |
7c9a4292 BB |
1004 | vdev_copy_arg_t *vca = zio->io_private; |
1005 | ||
1006 | if (zio->io_error != 0) { | |
1007 | mutex_enter(&vca->vca_lock); | |
1008 | vca->vca_read_error_bytes += zio->io_size; | |
1009 | mutex_exit(&vca->vca_lock); | |
1010 | } | |
1011 | ||
9e052db4 MA |
1012 | zio_nowait(zio_unique_parent(zio)); |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * If the old and new vdevs are mirrors, we will read both sides of the old | |
1017 | * mirror, and write each copy to the corresponding side of the new mirror. | |
1018 | * If the old and new vdevs have a different number of children, we will do | |
1019 | * this as best as possible. Since we aren't verifying checksums, this | |
1020 | * ensures that as long as there's a good copy of the data, we'll have a | |
1021 | * good copy after the removal, even if there's silent damage to one side | |
1022 | * of the mirror. If we're removing a mirror that has some silent damage, | |
1023 | * we'll have exactly the same damage in the new location (assuming that | |
1024 | * the new location is also a mirror). | |
1025 | * | |
1026 | * We accomplish this by creating a tree of zio_t's, with as many writes as | |
1027 | * there are "children" of the new vdev (a non-redundant vdev counts as one | |
1028 | * child, a 2-way mirror has 2 children, etc). Each write has an associated | |
1029 | * read from a child of the old vdev. Typically there will be the same | |
1030 | * number of children of the old and new vdevs. However, if there are more | |
1031 | * children of the new vdev, some child(ren) of the old vdev will be issued | |
1032 | * multiple reads. If there are more children of the old vdev, some copies | |
1033 | * will be dropped. | |
1034 | * | |
1035 | * For example, the tree of zio_t's for a 2-way mirror is: | |
1036 | * | |
1037 | * null | |
1038 | * / \ | |
1039 | * write(new vdev, child 0) write(new vdev, child 1) | |
1040 | * | | | |
1041 | * read(old vdev, child 0) read(old vdev, child 1) | |
1042 | * | |
1043 | * Child zio's complete before their parents complete. However, zio's | |
1044 | * created with zio_vdev_child_io() may be issued before their children | |
1045 | * complete. In this case we need to make sure that the children (reads) | |
1046 | * complete before the parents (writes) are *issued*. We do this by not | |
1047 | * calling zio_nowait() on each write until its corresponding read has | |
1048 | * completed. | |
1049 | * | |
1050 | * The spa_config_lock must be held while zio's created by | |
1051 | * zio_vdev_child_io() are in progress, to ensure that the vdev tree does | |
1052 | * not change (e.g. due to a concurrent "zpool attach/detach"). The "null" | |
1053 | * zio is needed to release the spa_config_lock after all the reads and | |
1054 | * writes complete. (Note that we can't grab the config lock for each read, | |
1055 | * because it is not reentrant - we could deadlock with a thread waiting | |
1056 | * for a write lock.) | |
1057 | */ | |
1058 | static void | |
1059 | spa_vdev_copy_one_child(vdev_copy_arg_t *vca, zio_t *nzio, | |
1060 | vdev_t *source_vd, uint64_t source_offset, | |
1061 | vdev_t *dest_child_vd, uint64_t dest_offset, int dest_id, uint64_t size) | |
1062 | { | |
1063 | ASSERT3U(spa_config_held(nzio->io_spa, SCL_ALL, RW_READER), !=, 0); | |
1064 | ||
7c9a4292 BB |
1065 | /* |
1066 | * If the destination child in unwritable then there is no point | |
1067 | * in issuing the source reads which cannot be written. | |
1068 | */ | |
1069 | if (!vdev_writeable(dest_child_vd)) | |
1070 | return; | |
1071 | ||
9e052db4 MA |
1072 | mutex_enter(&vca->vca_lock); |
1073 | vca->vca_outstanding_bytes += size; | |
1074 | mutex_exit(&vca->vca_lock); | |
1075 | ||
1076 | abd_t *abd = abd_alloc_for_io(size, B_FALSE); | |
1077 | ||
7c9a4292 | 1078 | vdev_t *source_child_vd = NULL; |
9e052db4 MA |
1079 | if (source_vd->vdev_ops == &vdev_mirror_ops && dest_id != -1) { |
1080 | /* | |
1081 | * Source and dest are both mirrors. Copy from the same | |
1082 | * child id as we are copying to (wrapping around if there | |
7c9a4292 BB |
1083 | * are more dest children than source children). If the |
1084 | * preferred source child is unreadable select another. | |
9e052db4 | 1085 | */ |
7c9a4292 BB |
1086 | for (int i = 0; i < source_vd->vdev_children; i++) { |
1087 | source_child_vd = source_vd->vdev_child[ | |
1088 | (dest_id + i) % source_vd->vdev_children]; | |
1089 | if (vdev_readable(source_child_vd)) | |
1090 | break; | |
1091 | } | |
9e052db4 MA |
1092 | } else { |
1093 | source_child_vd = source_vd; | |
1094 | } | |
1095 | ||
7c9a4292 BB |
1096 | /* |
1097 | * There should always be at least one readable source child or | |
1098 | * the pool would be in a suspended state. Somehow selecting an | |
1099 | * unreadable child would result in IO errors, the removal process | |
1100 | * being cancelled, and the pool reverting to its pre-removal state. | |
1101 | */ | |
1102 | ASSERT3P(source_child_vd, !=, NULL); | |
1103 | ||
9e052db4 MA |
1104 | zio_t *write_zio = zio_vdev_child_io(nzio, NULL, |
1105 | dest_child_vd, dest_offset, abd, size, | |
1106 | ZIO_TYPE_WRITE, ZIO_PRIORITY_REMOVAL, | |
1107 | ZIO_FLAG_CANFAIL, | |
1108 | spa_vdev_copy_segment_write_done, vca); | |
1109 | ||
1110 | zio_nowait(zio_vdev_child_io(write_zio, NULL, | |
1111 | source_child_vd, source_offset, abd, size, | |
1112 | ZIO_TYPE_READ, ZIO_PRIORITY_REMOVAL, | |
1113 | ZIO_FLAG_CANFAIL, | |
1114 | spa_vdev_copy_segment_read_done, vca)); | |
a1d477c2 MA |
1115 | } |
1116 | ||
9e052db4 MA |
1117 | /* |
1118 | * Allocate a new location for this segment, and create the zio_t's to | |
1119 | * read from the old location and write to the new location. | |
1120 | */ | |
a1d477c2 | 1121 | static int |
0dc2f70c MA |
1122 | spa_vdev_copy_segment(vdev_t *vd, range_tree_t *segs, |
1123 | uint64_t maxalloc, uint64_t txg, | |
a1d477c2 MA |
1124 | vdev_copy_arg_t *vca, zio_alloc_list_t *zal) |
1125 | { | |
1126 | metaslab_group_t *mg = vd->vdev_mg; | |
1127 | spa_t *spa = vd->vdev_spa; | |
1128 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
1129 | vdev_indirect_mapping_entry_t *entry; | |
a1d477c2 | 1130 | dva_t dst = {{ 0 }}; |
0dc2f70c | 1131 | uint64_t start = range_tree_min(segs); |
53dce5ac | 1132 | ASSERT0(P2PHASE(start, 1 << spa->spa_min_ashift)); |
0dc2f70c MA |
1133 | |
1134 | ASSERT3U(maxalloc, <=, SPA_MAXBLOCKSIZE); | |
53dce5ac | 1135 | ASSERT0(P2PHASE(maxalloc, 1 << spa->spa_min_ashift)); |
a1d477c2 | 1136 | |
0dc2f70c MA |
1137 | uint64_t size = range_tree_span(segs); |
1138 | if (range_tree_span(segs) > maxalloc) { | |
1139 | /* | |
1140 | * We can't allocate all the segments. Prefer to end | |
1141 | * the allocation at the end of a segment, thus avoiding | |
1142 | * additional split blocks. | |
1143 | */ | |
ca577779 PD |
1144 | range_seg_max_t search; |
1145 | zfs_btree_index_t where; | |
1146 | rs_set_start(&search, segs, start + maxalloc); | |
1147 | rs_set_end(&search, segs, start + maxalloc); | |
1148 | (void) zfs_btree_find(&segs->rt_root, &search, &where); | |
1149 | range_seg_t *rs = zfs_btree_prev(&segs->rt_root, &where, | |
1150 | &where); | |
0dc2f70c | 1151 | if (rs != NULL) { |
ca577779 | 1152 | size = rs_get_end(rs, segs) - start; |
0dc2f70c MA |
1153 | } else { |
1154 | /* | |
1155 | * There are no segments that end before maxalloc. | |
1156 | * I.e. the first segment is larger than maxalloc, | |
1157 | * so we must split it. | |
1158 | */ | |
1159 | size = maxalloc; | |
1160 | } | |
1161 | } | |
1162 | ASSERT3U(size, <=, maxalloc); | |
53dce5ac | 1163 | ASSERT0(P2PHASE(size, 1 << spa->spa_min_ashift)); |
a1d477c2 | 1164 | |
cc99f275 DB |
1165 | /* |
1166 | * An allocation class might not have any remaining vdevs or space | |
1167 | */ | |
1168 | metaslab_class_t *mc = mg->mg_class; | |
71e4ce0e | 1169 | if (mc->mc_groups == 0) |
cc99f275 | 1170 | mc = spa_normal_class(spa); |
7bf4c97a SD |
1171 | int error = metaslab_alloc_dva(spa, mc, size, &dst, 0, NULL, txg, |
1172 | METASLAB_DONT_THROTTLE, zal, 0); | |
cc99f275 DB |
1173 | if (error == ENOSPC && mc != spa_normal_class(spa)) { |
1174 | error = metaslab_alloc_dva(spa, spa_normal_class(spa), size, | |
7bf4c97a | 1175 | &dst, 0, NULL, txg, METASLAB_DONT_THROTTLE, zal, 0); |
cc99f275 | 1176 | } |
a1d477c2 MA |
1177 | if (error != 0) |
1178 | return (error); | |
1179 | ||
0dc2f70c MA |
1180 | /* |
1181 | * Determine the ranges that are not actually needed. Offsets are | |
1182 | * relative to the start of the range to be copied (i.e. relative to the | |
1183 | * local variable "start"). | |
1184 | */ | |
ca577779 PD |
1185 | range_tree_t *obsolete_segs = range_tree_create(NULL, RANGE_SEG64, NULL, |
1186 | 0, 0); | |
1187 | ||
1188 | zfs_btree_index_t where; | |
1189 | range_seg_t *rs = zfs_btree_first(&segs->rt_root, &where); | |
1190 | ASSERT3U(rs_get_start(rs, segs), ==, start); | |
1191 | uint64_t prev_seg_end = rs_get_end(rs, segs); | |
1192 | while ((rs = zfs_btree_next(&segs->rt_root, &where, &where)) != NULL) { | |
1193 | if (rs_get_start(rs, segs) >= start + size) { | |
0dc2f70c MA |
1194 | break; |
1195 | } else { | |
1196 | range_tree_add(obsolete_segs, | |
1197 | prev_seg_end - start, | |
ca577779 | 1198 | rs_get_start(rs, segs) - prev_seg_end); |
0dc2f70c | 1199 | } |
ca577779 | 1200 | prev_seg_end = rs_get_end(rs, segs); |
0dc2f70c MA |
1201 | } |
1202 | /* We don't end in the middle of an obsolete range */ | |
1203 | ASSERT3U(start + size, <=, prev_seg_end); | |
1204 | ||
1205 | range_tree_clear(segs, start, size); | |
1206 | ||
a1d477c2 MA |
1207 | /* |
1208 | * We can't have any padding of the allocated size, otherwise we will | |
53dce5ac MA |
1209 | * misunderstand what's allocated, and the size of the mapping. We |
1210 | * prevent padding by ensuring that all devices in the pool have the | |
1211 | * same ashift, and the allocation size is a multiple of the ashift. | |
a1d477c2 | 1212 | */ |
53dce5ac | 1213 | VERIFY3U(DVA_GET_ASIZE(&dst), ==, size); |
a1d477c2 | 1214 | |
a1d477c2 MA |
1215 | entry = kmem_zalloc(sizeof (vdev_indirect_mapping_entry_t), KM_SLEEP); |
1216 | DVA_MAPPING_SET_SRC_OFFSET(&entry->vime_mapping, start); | |
1217 | entry->vime_mapping.vimep_dst = dst; | |
0dc2f70c MA |
1218 | if (spa_feature_is_enabled(spa, SPA_FEATURE_OBSOLETE_COUNTS)) { |
1219 | entry->vime_obsolete_count = range_tree_space(obsolete_segs); | |
1220 | } | |
1221 | ||
1222 | vdev_copy_segment_arg_t *vcsa = kmem_zalloc(sizeof (*vcsa), KM_SLEEP); | |
1223 | vcsa->vcsa_dest_dva = &entry->vime_mapping.vimep_dst; | |
1224 | vcsa->vcsa_obsolete_segs = obsolete_segs; | |
1225 | vcsa->vcsa_spa = spa; | |
1226 | vcsa->vcsa_txg = txg; | |
a1d477c2 | 1227 | |
a1d477c2 | 1228 | /* |
9e052db4 | 1229 | * See comment before spa_vdev_copy_one_child(). |
a1d477c2 | 1230 | */ |
9e052db4 MA |
1231 | spa_config_enter(spa, SCL_STATE, spa, RW_READER); |
1232 | zio_t *nzio = zio_null(spa->spa_txg_zio[txg & TXG_MASK], spa, NULL, | |
0dc2f70c | 1233 | spa_vdev_copy_segment_done, vcsa, 0); |
9e052db4 MA |
1234 | vdev_t *dest_vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dst)); |
1235 | if (dest_vd->vdev_ops == &vdev_mirror_ops) { | |
1236 | for (int i = 0; i < dest_vd->vdev_children; i++) { | |
1237 | vdev_t *child = dest_vd->vdev_child[i]; | |
1238 | spa_vdev_copy_one_child(vca, nzio, vd, start, | |
1239 | child, DVA_GET_OFFSET(&dst), i, size); | |
1240 | } | |
1241 | } else { | |
1242 | spa_vdev_copy_one_child(vca, nzio, vd, start, | |
1243 | dest_vd, DVA_GET_OFFSET(&dst), -1, size); | |
1244 | } | |
1245 | zio_nowait(nzio); | |
a1d477c2 MA |
1246 | |
1247 | list_insert_tail(&svr->svr_new_segments[txg & TXG_MASK], entry); | |
1248 | ASSERT3U(start + size, <=, vd->vdev_ms_count << vd->vdev_ms_shift); | |
1249 | vdev_dirty(vd, 0, NULL, txg); | |
1250 | ||
1251 | return (0); | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Complete the removal of a toplevel vdev. This is called as a | |
1256 | * synctask in the same txg that we will sync out the new config (to the | |
1257 | * MOS object) which indicates that this vdev is indirect. | |
1258 | */ | |
1259 | static void | |
1260 | vdev_remove_complete_sync(void *arg, dmu_tx_t *tx) | |
1261 | { | |
1262 | spa_vdev_removal_t *svr = arg; | |
9e052db4 MA |
1263 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; |
1264 | vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id); | |
a1d477c2 MA |
1265 | |
1266 | ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops); | |
1267 | ||
1268 | for (int i = 0; i < TXG_SIZE; i++) { | |
1269 | ASSERT0(svr->svr_bytes_done[i]); | |
1270 | } | |
1271 | ||
1272 | ASSERT3U(spa->spa_removing_phys.sr_copied, ==, | |
1273 | spa->spa_removing_phys.sr_to_copy); | |
1274 | ||
1275 | vdev_destroy_spacemaps(vd, tx); | |
1276 | ||
1277 | /* destroy leaf zaps, if any */ | |
1278 | ASSERT3P(svr->svr_zaplist, !=, NULL); | |
1279 | for (nvpair_t *pair = nvlist_next_nvpair(svr->svr_zaplist, NULL); | |
1280 | pair != NULL; | |
1281 | pair = nvlist_next_nvpair(svr->svr_zaplist, pair)) { | |
1282 | vdev_destroy_unlink_zap(vd, fnvpair_value_uint64(pair), tx); | |
1283 | } | |
1284 | fnvlist_free(svr->svr_zaplist); | |
1285 | ||
1286 | spa_finish_removal(dmu_tx_pool(tx)->dp_spa, DSS_FINISHED, tx); | |
1287 | /* vd->vdev_path is not available here */ | |
1288 | spa_history_log_internal(spa, "vdev remove completed", tx, | |
74756182 | 1289 | "%s vdev %llu", spa_name(spa), (u_longlong_t)vd->vdev_id); |
a1d477c2 MA |
1290 | } |
1291 | ||
a1d477c2 MA |
1292 | static void |
1293 | vdev_remove_enlist_zaps(vdev_t *vd, nvlist_t *zlist) | |
1294 | { | |
1295 | ASSERT3P(zlist, !=, NULL); | |
b2255edc | 1296 | ASSERT0(vdev_get_nparity(vd)); |
a1d477c2 MA |
1297 | |
1298 | if (vd->vdev_leaf_zap != 0) { | |
1299 | char zkey[32]; | |
1300 | (void) snprintf(zkey, sizeof (zkey), "%s-%llu", | |
1301 | VDEV_REMOVAL_ZAP_OBJS, (u_longlong_t)vd->vdev_leaf_zap); | |
1302 | fnvlist_add_uint64(zlist, zkey, vd->vdev_leaf_zap); | |
1303 | } | |
1304 | ||
1305 | for (uint64_t id = 0; id < vd->vdev_children; id++) { | |
1306 | vdev_remove_enlist_zaps(vd->vdev_child[id], zlist); | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | static void | |
1311 | vdev_remove_replace_with_indirect(vdev_t *vd, uint64_t txg) | |
1312 | { | |
1313 | vdev_t *ivd; | |
1314 | dmu_tx_t *tx; | |
1315 | spa_t *spa = vd->vdev_spa; | |
1316 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
1317 | ||
1318 | /* | |
1319 | * First, build a list of leaf zaps to be destroyed. | |
1320 | * This is passed to the sync context thread, | |
1321 | * which does the actual unlinking. | |
1322 | */ | |
1323 | svr->svr_zaplist = fnvlist_alloc(); | |
1324 | vdev_remove_enlist_zaps(vd, svr->svr_zaplist); | |
1325 | ||
1326 | ivd = vdev_add_parent(vd, &vdev_indirect_ops); | |
9e052db4 | 1327 | ivd->vdev_removing = 0; |
a1d477c2 MA |
1328 | |
1329 | vd->vdev_leaf_zap = 0; | |
1330 | ||
1331 | vdev_remove_child(ivd, vd); | |
1332 | vdev_compact_children(ivd); | |
1333 | ||
a1d477c2 MA |
1334 | ASSERT(!list_link_active(&vd->vdev_state_dirty_node)); |
1335 | ||
a1d477c2 MA |
1336 | mutex_enter(&svr->svr_lock); |
1337 | svr->svr_thread = NULL; | |
1338 | cv_broadcast(&svr->svr_cv); | |
1339 | mutex_exit(&svr->svr_lock); | |
ac53e50f TC |
1340 | |
1341 | /* After this, we can not use svr. */ | |
1342 | tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
38080324 MA |
1343 | dsl_sync_task_nowait(spa->spa_dsl_pool, |
1344 | vdev_remove_complete_sync, svr, tx); | |
ac53e50f | 1345 | dmu_tx_commit(tx); |
a1d477c2 MA |
1346 | } |
1347 | ||
1348 | /* | |
1349 | * Complete the removal of a toplevel vdev. This is called in open | |
1350 | * context by the removal thread after we have copied all vdev's data. | |
1351 | */ | |
1352 | static void | |
9e052db4 | 1353 | vdev_remove_complete(spa_t *spa) |
a1d477c2 | 1354 | { |
a1d477c2 MA |
1355 | uint64_t txg; |
1356 | ||
1357 | /* | |
1358 | * Wait for any deferred frees to be synced before we call | |
1359 | * vdev_metaslab_fini() | |
1360 | */ | |
1361 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
a1d477c2 | 1362 | txg = spa_vdev_enter(spa); |
9e052db4 | 1363 | vdev_t *vd = vdev_lookup_top(spa, spa->spa_vdev_removal->svr_vdev_id); |
619f0976 | 1364 | ASSERT3P(vd->vdev_initialize_thread, ==, NULL); |
1b939560 BB |
1365 | ASSERT3P(vd->vdev_trim_thread, ==, NULL); |
1366 | ASSERT3P(vd->vdev_autotrim_thread, ==, NULL); | |
7829b465 PD |
1367 | vdev_rebuild_stop_wait(vd); |
1368 | ASSERT3P(vd->vdev_rebuild_thread, ==, NULL); | |
2a673e76 AJ |
1369 | uint64_t vdev_space = spa_deflate(spa) ? |
1370 | vd->vdev_stat.vs_dspace : vd->vdev_stat.vs_space; | |
9e052db4 MA |
1371 | |
1372 | sysevent_t *ev = spa_event_create(spa, vd, NULL, | |
1373 | ESC_ZFS_VDEV_REMOVE_DEV); | |
1374 | ||
a1d477c2 | 1375 | zfs_dbgmsg("finishing device removal for vdev %llu in txg %llu", |
8e739b2c | 1376 | (u_longlong_t)vd->vdev_id, (u_longlong_t)txg); |
a1d477c2 | 1377 | |
2a673e76 AJ |
1378 | ASSERT3U(0, !=, vdev_space); |
1379 | ASSERT3U(spa->spa_nonallocating_dspace, >=, vdev_space); | |
1380 | ||
1381 | /* the vdev is no longer part of the dspace */ | |
1382 | spa->spa_nonallocating_dspace -= vdev_space; | |
1383 | ||
a1d477c2 MA |
1384 | /* |
1385 | * Discard allocation state. | |
1386 | */ | |
1387 | if (vd->vdev_mg != NULL) { | |
1388 | vdev_metaslab_fini(vd); | |
1389 | metaslab_group_destroy(vd->vdev_mg); | |
1390 | vd->vdev_mg = NULL; | |
1391 | } | |
aa755b35 MA |
1392 | if (vd->vdev_log_mg != NULL) { |
1393 | ASSERT0(vd->vdev_ms_count); | |
1394 | metaslab_group_destroy(vd->vdev_log_mg); | |
1395 | vd->vdev_log_mg = NULL; | |
1396 | } | |
a1d477c2 MA |
1397 | ASSERT0(vd->vdev_stat.vs_space); |
1398 | ASSERT0(vd->vdev_stat.vs_dspace); | |
1399 | ||
1400 | vdev_remove_replace_with_indirect(vd, txg); | |
1401 | ||
1402 | /* | |
1403 | * We now release the locks, allowing spa_sync to run and finish the | |
1404 | * removal via vdev_remove_complete_sync in syncing context. | |
9e052db4 MA |
1405 | * |
1406 | * Note that we hold on to the vdev_t that has been replaced. Since | |
1407 | * it isn't part of the vdev tree any longer, it can't be concurrently | |
1408 | * manipulated, even while we don't have the config lock. | |
a1d477c2 MA |
1409 | */ |
1410 | (void) spa_vdev_exit(spa, NULL, txg, 0); | |
1411 | ||
1412 | /* | |
1413 | * Top ZAP should have been transferred to the indirect vdev in | |
1414 | * vdev_remove_replace_with_indirect. | |
1415 | */ | |
1416 | ASSERT0(vd->vdev_top_zap); | |
1417 | ||
1418 | /* | |
1419 | * Leaf ZAP should have been moved in vdev_remove_replace_with_indirect. | |
1420 | */ | |
1421 | ASSERT0(vd->vdev_leaf_zap); | |
1422 | ||
1423 | txg = spa_vdev_enter(spa); | |
1424 | (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); | |
1425 | /* | |
1426 | * Request to update the config and the config cachefile. | |
1427 | */ | |
1428 | vdev_config_dirty(spa->spa_root_vdev); | |
1429 | (void) spa_vdev_exit(spa, vd, txg, 0); | |
9e052db4 MA |
1430 | |
1431 | if (ev != NULL) | |
1432 | spa_event_post(ev); | |
a1d477c2 MA |
1433 | } |
1434 | ||
1435 | /* | |
1436 | * Evacuates a segment of size at most max_alloc from the vdev | |
1437 | * via repeated calls to spa_vdev_copy_segment. If an allocation | |
1438 | * fails, the pool is probably too fragmented to handle such a | |
1439 | * large size, so decrease max_alloc so that the caller will not try | |
1440 | * this size again this txg. | |
1441 | */ | |
1442 | static void | |
9e052db4 | 1443 | spa_vdev_copy_impl(vdev_t *vd, spa_vdev_removal_t *svr, vdev_copy_arg_t *vca, |
a1d477c2 MA |
1444 | uint64_t *max_alloc, dmu_tx_t *tx) |
1445 | { | |
1446 | uint64_t txg = dmu_tx_get_txg(tx); | |
1447 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; | |
1448 | ||
1449 | mutex_enter(&svr->svr_lock); | |
1450 | ||
0dc2f70c MA |
1451 | /* |
1452 | * Determine how big of a chunk to copy. We can allocate up | |
1453 | * to max_alloc bytes, and we can span up to vdev_removal_max_span | |
1454 | * bytes of unallocated space at a time. "segs" will track the | |
1455 | * allocated segments that we are copying. We may also be copying | |
1456 | * free segments (of up to vdev_removal_max_span bytes). | |
1457 | */ | |
ca577779 | 1458 | range_tree_t *segs = range_tree_create(NULL, RANGE_SEG64, NULL, 0, 0); |
0dc2f70c | 1459 | for (;;) { |
ca577779 PD |
1460 | range_tree_t *rt = svr->svr_allocd_segs; |
1461 | range_seg_t *rs = range_tree_first(rt); | |
0dc2f70c MA |
1462 | |
1463 | if (rs == NULL) | |
1464 | break; | |
1465 | ||
1466 | uint64_t seg_length; | |
1467 | ||
1468 | if (range_tree_is_empty(segs)) { | |
1469 | /* need to truncate the first seg based on max_alloc */ | |
ca577779 PD |
1470 | seg_length = MIN(rs_get_end(rs, rt) - rs_get_start(rs, |
1471 | rt), *max_alloc); | |
0dc2f70c | 1472 | } else { |
ca577779 | 1473 | if (rs_get_start(rs, rt) - range_tree_max(segs) > |
0dc2f70c MA |
1474 | vdev_removal_max_span) { |
1475 | /* | |
1476 | * Including this segment would cause us to | |
1477 | * copy a larger unneeded chunk than is allowed. | |
1478 | */ | |
1479 | break; | |
ca577779 | 1480 | } else if (rs_get_end(rs, rt) - range_tree_min(segs) > |
0dc2f70c MA |
1481 | *max_alloc) { |
1482 | /* | |
1483 | * This additional segment would extend past | |
1484 | * max_alloc. Rather than splitting this | |
1485 | * segment, leave it for the next mapping. | |
1486 | */ | |
1487 | break; | |
1488 | } else { | |
ca577779 PD |
1489 | seg_length = rs_get_end(rs, rt) - |
1490 | rs_get_start(rs, rt); | |
0dc2f70c MA |
1491 | } |
1492 | } | |
1493 | ||
ca577779 | 1494 | range_tree_add(segs, rs_get_start(rs, rt), seg_length); |
0dc2f70c | 1495 | range_tree_remove(svr->svr_allocd_segs, |
ca577779 | 1496 | rs_get_start(rs, rt), seg_length); |
0dc2f70c MA |
1497 | } |
1498 | ||
1499 | if (range_tree_is_empty(segs)) { | |
a1d477c2 | 1500 | mutex_exit(&svr->svr_lock); |
0dc2f70c | 1501 | range_tree_destroy(segs); |
a1d477c2 MA |
1502 | return; |
1503 | } | |
a1d477c2 MA |
1504 | |
1505 | if (svr->svr_max_offset_to_sync[txg & TXG_MASK] == 0) { | |
1506 | dsl_sync_task_nowait(dmu_tx_pool(tx), vdev_mapping_sync, | |
38080324 | 1507 | svr, tx); |
a1d477c2 MA |
1508 | } |
1509 | ||
0dc2f70c | 1510 | svr->svr_max_offset_to_sync[txg & TXG_MASK] = range_tree_max(segs); |
a1d477c2 MA |
1511 | |
1512 | /* | |
1513 | * Note: this is the amount of *allocated* space | |
1514 | * that we are taking care of each txg. | |
1515 | */ | |
0dc2f70c | 1516 | svr->svr_bytes_done[txg & TXG_MASK] += range_tree_space(segs); |
a1d477c2 MA |
1517 | |
1518 | mutex_exit(&svr->svr_lock); | |
1519 | ||
1520 | zio_alloc_list_t zal; | |
1521 | metaslab_trace_init(&zal); | |
0dc2f70c MA |
1522 | uint64_t thismax = SPA_MAXBLOCKSIZE; |
1523 | while (!range_tree_is_empty(segs)) { | |
9e052db4 | 1524 | int error = spa_vdev_copy_segment(vd, |
0dc2f70c | 1525 | segs, thismax, txg, vca, &zal); |
a1d477c2 MA |
1526 | |
1527 | if (error == ENOSPC) { | |
1528 | /* | |
1529 | * Cut our segment in half, and don't try this | |
1530 | * segment size again this txg. Note that the | |
1531 | * allocation size must be aligned to the highest | |
1532 | * ashift in the pool, so that the allocation will | |
1533 | * not be padded out to a multiple of the ashift, | |
1534 | * which could cause us to think that this mapping | |
1535 | * is larger than we intended. | |
1536 | */ | |
1537 | ASSERT3U(spa->spa_max_ashift, >=, SPA_MINBLOCKSHIFT); | |
1538 | ASSERT3U(spa->spa_max_ashift, ==, spa->spa_min_ashift); | |
0dc2f70c MA |
1539 | uint64_t attempted = |
1540 | MIN(range_tree_span(segs), thismax); | |
1541 | thismax = P2ROUNDUP(attempted / 2, | |
a1d477c2 | 1542 | 1 << spa->spa_max_ashift); |
a1d477c2 MA |
1543 | /* |
1544 | * The minimum-size allocation can not fail. | |
1545 | */ | |
0dc2f70c MA |
1546 | ASSERT3U(attempted, >, 1 << spa->spa_max_ashift); |
1547 | *max_alloc = attempted - (1 << spa->spa_max_ashift); | |
a1d477c2 MA |
1548 | } else { |
1549 | ASSERT0(error); | |
a1d477c2 MA |
1550 | |
1551 | /* | |
1552 | * We've performed an allocation, so reset the | |
1553 | * alloc trace list. | |
1554 | */ | |
1555 | metaslab_trace_fini(&zal); | |
1556 | metaslab_trace_init(&zal); | |
1557 | } | |
1558 | } | |
1559 | metaslab_trace_fini(&zal); | |
0dc2f70c | 1560 | range_tree_destroy(segs); |
a1d477c2 MA |
1561 | } |
1562 | ||
53dce5ac MA |
1563 | /* |
1564 | * The size of each removal mapping is limited by the tunable | |
1565 | * zfs_remove_max_segment, but we must adjust this to be a multiple of the | |
1566 | * pool's ashift, so that we don't try to split individual sectors regardless | |
1567 | * of the tunable value. (Note that device removal requires that all devices | |
1568 | * have the same ashift, so there's no difference between spa_min_ashift and | |
1569 | * spa_max_ashift.) The raw tunable should not be used elsewhere. | |
1570 | */ | |
1571 | uint64_t | |
1572 | spa_remove_max_segment(spa_t *spa) | |
1573 | { | |
1574 | return (P2ROUNDUP(zfs_remove_max_segment, 1 << spa->spa_max_ashift)); | |
1575 | } | |
1576 | ||
a1d477c2 MA |
1577 | /* |
1578 | * The removal thread operates in open context. It iterates over all | |
1579 | * allocated space in the vdev, by loading each metaslab's spacemap. | |
1580 | * For each contiguous segment of allocated space (capping the segment | |
1581 | * size at SPA_MAXBLOCKSIZE), we: | |
1582 | * - Allocate space for it on another vdev. | |
1583 | * - Create a new mapping from the old location to the new location | |
1584 | * (as a record in svr_new_segments). | |
1585 | * - Initiate a physical read zio to get the data off the removing disk. | |
1586 | * - In the read zio's done callback, initiate a physical write zio to | |
1587 | * write it to the new vdev. | |
1588 | * Note that all of this will take effect when a particular TXG syncs. | |
1589 | * The sync thread ensures that all the phys reads and writes for the syncing | |
1590 | * TXG have completed (see spa_txg_zio) and writes the new mappings to disk | |
1591 | * (see vdev_mapping_sync()). | |
1592 | */ | |
460748d4 | 1593 | static __attribute__((noreturn)) void |
a1d477c2 MA |
1594 | spa_vdev_remove_thread(void *arg) |
1595 | { | |
9e052db4 | 1596 | spa_t *spa = arg; |
a1d477c2 MA |
1597 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; |
1598 | vdev_copy_arg_t vca; | |
53dce5ac | 1599 | uint64_t max_alloc = spa_remove_max_segment(spa); |
a1d477c2 | 1600 | uint64_t last_txg = 0; |
9e052db4 MA |
1601 | |
1602 | spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); | |
1603 | vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id); | |
a1d477c2 MA |
1604 | vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; |
1605 | uint64_t start_offset = vdev_indirect_mapping_max_offset(vim); | |
1606 | ||
1607 | ASSERT3P(vd->vdev_ops, !=, &vdev_indirect_ops); | |
1608 | ASSERT(vdev_is_concrete(vd)); | |
1609 | ASSERT(vd->vdev_removing); | |
1610 | ASSERT(vd->vdev_indirect_config.vic_mapping_object != 0); | |
a1d477c2 MA |
1611 | ASSERT(vim != NULL); |
1612 | ||
1613 | mutex_init(&vca.vca_lock, NULL, MUTEX_DEFAULT, NULL); | |
1614 | cv_init(&vca.vca_cv, NULL, CV_DEFAULT, NULL); | |
1615 | vca.vca_outstanding_bytes = 0; | |
7c9a4292 BB |
1616 | vca.vca_read_error_bytes = 0; |
1617 | vca.vca_write_error_bytes = 0; | |
a1d477c2 MA |
1618 | |
1619 | mutex_enter(&svr->svr_lock); | |
1620 | ||
1621 | /* | |
1622 | * Start from vim_max_offset so we pick up where we left off | |
1623 | * if we are restarting the removal after opening the pool. | |
1624 | */ | |
1625 | uint64_t msi; | |
1626 | for (msi = start_offset >> vd->vdev_ms_shift; | |
1627 | msi < vd->vdev_ms_count && !svr->svr_thread_exit; msi++) { | |
1628 | metaslab_t *msp = vd->vdev_ms[msi]; | |
1629 | ASSERT3U(msi, <=, vd->vdev_ms_count); | |
1630 | ||
1631 | ASSERT0(range_tree_space(svr->svr_allocd_segs)); | |
1632 | ||
1633 | mutex_enter(&msp->ms_sync_lock); | |
1634 | mutex_enter(&msp->ms_lock); | |
1635 | ||
1636 | /* | |
1637 | * Assert nothing in flight -- ms_*tree is empty. | |
1638 | */ | |
1639 | for (int i = 0; i < TXG_SIZE; i++) { | |
d2734cce | 1640 | ASSERT0(range_tree_space(msp->ms_allocating[i])); |
a1d477c2 MA |
1641 | } |
1642 | ||
1643 | /* | |
1644 | * If the metaslab has ever been allocated from (ms_sm!=NULL), | |
1645 | * read the allocated segments from the space map object | |
1646 | * into svr_allocd_segs. Since we do this while holding | |
1647 | * svr_lock and ms_sync_lock, concurrent frees (which | |
1648 | * would have modified the space map) will wait for us | |
1649 | * to finish loading the spacemap, and then take the | |
1650 | * appropriate action (see free_from_removing_vdev()). | |
1651 | */ | |
1652 | if (msp->ms_sm != NULL) { | |
425d3237 SD |
1653 | VERIFY0(space_map_load(msp->ms_sm, |
1654 | svr->svr_allocd_segs, SM_ALLOC)); | |
a1d477c2 | 1655 | |
93e28d66 SD |
1656 | range_tree_walk(msp->ms_unflushed_allocs, |
1657 | range_tree_add, svr->svr_allocd_segs); | |
1658 | range_tree_walk(msp->ms_unflushed_frees, | |
1659 | range_tree_remove, svr->svr_allocd_segs); | |
d2734cce | 1660 | range_tree_walk(msp->ms_freeing, |
a1d477c2 MA |
1661 | range_tree_remove, svr->svr_allocd_segs); |
1662 | ||
1663 | /* | |
1664 | * When we are resuming from a paused removal (i.e. | |
1665 | * when importing a pool with a removal in progress), | |
1666 | * discard any state that we have already processed. | |
1667 | */ | |
1668 | range_tree_clear(svr->svr_allocd_segs, 0, start_offset); | |
1669 | } | |
1670 | mutex_exit(&msp->ms_lock); | |
1671 | mutex_exit(&msp->ms_sync_lock); | |
1672 | ||
1673 | vca.vca_msp = msp; | |
1674 | zfs_dbgmsg("copying %llu segments for metaslab %llu", | |
8e739b2c RE |
1675 | (u_longlong_t)zfs_btree_numnodes( |
1676 | &svr->svr_allocd_segs->rt_root), | |
1677 | (u_longlong_t)msp->ms_id); | |
a1d477c2 MA |
1678 | |
1679 | while (!svr->svr_thread_exit && | |
d2734cce | 1680 | !range_tree_is_empty(svr->svr_allocd_segs)) { |
a1d477c2 MA |
1681 | |
1682 | mutex_exit(&svr->svr_lock); | |
1683 | ||
9e052db4 MA |
1684 | /* |
1685 | * We need to periodically drop the config lock so that | |
1686 | * writers can get in. Additionally, we can't wait | |
1687 | * for a txg to sync while holding a config lock | |
1688 | * (since a waiting writer could cause a 3-way deadlock | |
1689 | * with the sync thread, which also gets a config | |
1690 | * lock for reader). So we can't hold the config lock | |
1691 | * while calling dmu_tx_assign(). | |
1692 | */ | |
1693 | spa_config_exit(spa, SCL_CONFIG, FTAG); | |
1694 | ||
d2734cce SD |
1695 | /* |
1696 | * This delay will pause the removal around the point | |
cef48f14 | 1697 | * specified by zfs_removal_suspend_progress. We do this |
d2734cce SD |
1698 | * solely from the test suite or during debugging. |
1699 | */ | |
cef48f14 | 1700 | while (zfs_removal_suspend_progress && |
d2734cce SD |
1701 | !svr->svr_thread_exit) |
1702 | delay(hz); | |
1703 | ||
a1d477c2 MA |
1704 | mutex_enter(&vca.vca_lock); |
1705 | while (vca.vca_outstanding_bytes > | |
1706 | zfs_remove_max_copy_bytes) { | |
1707 | cv_wait(&vca.vca_cv, &vca.vca_lock); | |
1708 | } | |
1709 | mutex_exit(&vca.vca_lock); | |
1710 | ||
1711 | dmu_tx_t *tx = | |
1712 | dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); | |
3475724e | 1713 | |
a1d477c2 MA |
1714 | VERIFY0(dmu_tx_assign(tx, TXG_WAIT)); |
1715 | uint64_t txg = dmu_tx_get_txg(tx); | |
1716 | ||
9e052db4 MA |
1717 | /* |
1718 | * Reacquire the vdev_config lock. The vdev_t | |
1719 | * that we're removing may have changed, e.g. due | |
1720 | * to a vdev_attach or vdev_detach. | |
1721 | */ | |
1722 | spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); | |
1723 | vd = vdev_lookup_top(spa, svr->svr_vdev_id); | |
1724 | ||
a1d477c2 | 1725 | if (txg != last_txg) |
53dce5ac | 1726 | max_alloc = spa_remove_max_segment(spa); |
a1d477c2 MA |
1727 | last_txg = txg; |
1728 | ||
9e052db4 | 1729 | spa_vdev_copy_impl(vd, svr, &vca, &max_alloc, tx); |
a1d477c2 MA |
1730 | |
1731 | dmu_tx_commit(tx); | |
1732 | mutex_enter(&svr->svr_lock); | |
1733 | } | |
7c9a4292 BB |
1734 | |
1735 | mutex_enter(&vca.vca_lock); | |
1736 | if (zfs_removal_ignore_errors == 0 && | |
1737 | (vca.vca_read_error_bytes > 0 || | |
1738 | vca.vca_write_error_bytes > 0)) { | |
1739 | svr->svr_thread_exit = B_TRUE; | |
1740 | } | |
1741 | mutex_exit(&vca.vca_lock); | |
a1d477c2 MA |
1742 | } |
1743 | ||
1744 | mutex_exit(&svr->svr_lock); | |
9e052db4 MA |
1745 | |
1746 | spa_config_exit(spa, SCL_CONFIG, FTAG); | |
1747 | ||
a1d477c2 MA |
1748 | /* |
1749 | * Wait for all copies to finish before cleaning up the vca. | |
1750 | */ | |
1751 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
1752 | ASSERT0(vca.vca_outstanding_bytes); | |
1753 | ||
1754 | mutex_destroy(&vca.vca_lock); | |
1755 | cv_destroy(&vca.vca_cv); | |
1756 | ||
1757 | if (svr->svr_thread_exit) { | |
1758 | mutex_enter(&svr->svr_lock); | |
1759 | range_tree_vacate(svr->svr_allocd_segs, NULL, NULL); | |
1760 | svr->svr_thread = NULL; | |
1761 | cv_broadcast(&svr->svr_cv); | |
1762 | mutex_exit(&svr->svr_lock); | |
7c9a4292 BB |
1763 | |
1764 | /* | |
1765 | * During the removal process an unrecoverable read or write | |
1766 | * error was encountered. The removal process must be | |
1767 | * cancelled or this damage may become permanent. | |
1768 | */ | |
1769 | if (zfs_removal_ignore_errors == 0 && | |
1770 | (vca.vca_read_error_bytes > 0 || | |
1771 | vca.vca_write_error_bytes > 0)) { | |
1772 | zfs_dbgmsg("canceling removal due to IO errors: " | |
1773 | "[read_error_bytes=%llu] [write_error_bytes=%llu]", | |
8e739b2c RE |
1774 | (u_longlong_t)vca.vca_read_error_bytes, |
1775 | (u_longlong_t)vca.vca_write_error_bytes); | |
7c9a4292 BB |
1776 | spa_vdev_remove_cancel_impl(spa); |
1777 | } | |
a1d477c2 MA |
1778 | } else { |
1779 | ASSERT0(range_tree_space(svr->svr_allocd_segs)); | |
9e052db4 | 1780 | vdev_remove_complete(spa); |
a1d477c2 | 1781 | } |
eeb8fae9 JL |
1782 | |
1783 | thread_exit(); | |
a1d477c2 MA |
1784 | } |
1785 | ||
1786 | void | |
1787 | spa_vdev_remove_suspend(spa_t *spa) | |
1788 | { | |
1789 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
1790 | ||
1791 | if (svr == NULL) | |
1792 | return; | |
1793 | ||
1794 | mutex_enter(&svr->svr_lock); | |
1795 | svr->svr_thread_exit = B_TRUE; | |
1796 | while (svr->svr_thread != NULL) | |
1797 | cv_wait(&svr->svr_cv, &svr->svr_lock); | |
1798 | svr->svr_thread_exit = B_FALSE; | |
1799 | mutex_exit(&svr->svr_lock); | |
1800 | } | |
1801 | ||
2a673e76 AJ |
1802 | /* |
1803 | * Return true if the "allocating" property has been set to "off" | |
1804 | */ | |
1805 | static boolean_t | |
1806 | vdev_prop_allocating_off(vdev_t *vd) | |
1807 | { | |
1808 | uint64_t objid = vd->vdev_top_zap; | |
1809 | uint64_t allocating = 1; | |
1810 | ||
1811 | /* no vdev property object => no props */ | |
1812 | if (objid != 0) { | |
1813 | spa_t *spa = vd->vdev_spa; | |
1814 | objset_t *mos = spa->spa_meta_objset; | |
1815 | ||
1816 | mutex_enter(&spa->spa_props_lock); | |
1817 | (void) zap_lookup(mos, objid, "allocating", sizeof (uint64_t), | |
1818 | 1, &allocating); | |
1819 | mutex_exit(&spa->spa_props_lock); | |
1820 | } | |
1821 | return (allocating == 0); | |
1822 | } | |
1823 | ||
a1d477c2 MA |
1824 | static int |
1825 | spa_vdev_remove_cancel_check(void *arg, dmu_tx_t *tx) | |
1826 | { | |
14e4e3cb | 1827 | (void) arg; |
a1d477c2 MA |
1828 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; |
1829 | ||
1830 | if (spa->spa_vdev_removal == NULL) | |
1831 | return (ENOTACTIVE); | |
1832 | return (0); | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * Cancel a removal by freeing all entries from the partial mapping | |
1837 | * and marking the vdev as no longer being removing. | |
1838 | */ | |
a1d477c2 MA |
1839 | static void |
1840 | spa_vdev_remove_cancel_sync(void *arg, dmu_tx_t *tx) | |
1841 | { | |
14e4e3cb | 1842 | (void) arg; |
a1d477c2 MA |
1843 | spa_t *spa = dmu_tx_pool(tx)->dp_spa; |
1844 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
9e052db4 | 1845 | vdev_t *vd = vdev_lookup_top(spa, svr->svr_vdev_id); |
a1d477c2 MA |
1846 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; |
1847 | vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; | |
1848 | objset_t *mos = spa->spa_meta_objset; | |
1849 | ||
1850 | ASSERT3P(svr->svr_thread, ==, NULL); | |
1851 | ||
1852 | spa_feature_decr(spa, SPA_FEATURE_DEVICE_REMOVAL, tx); | |
27f80e85 BB |
1853 | |
1854 | boolean_t are_precise; | |
1855 | VERIFY0(vdev_obsolete_counts_are_precise(vd, &are_precise)); | |
1856 | if (are_precise) { | |
a1d477c2 MA |
1857 | spa_feature_decr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); |
1858 | VERIFY0(zap_remove(spa->spa_meta_objset, vd->vdev_top_zap, | |
1859 | VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE, tx)); | |
1860 | } | |
1861 | ||
27f80e85 BB |
1862 | uint64_t obsolete_sm_object; |
1863 | VERIFY0(vdev_obsolete_sm_object(vd, &obsolete_sm_object)); | |
1864 | if (obsolete_sm_object != 0) { | |
a1d477c2 | 1865 | ASSERT(vd->vdev_obsolete_sm != NULL); |
27f80e85 | 1866 | ASSERT3U(obsolete_sm_object, ==, |
a1d477c2 MA |
1867 | space_map_object(vd->vdev_obsolete_sm)); |
1868 | ||
1869 | space_map_free(vd->vdev_obsolete_sm, tx); | |
1870 | VERIFY0(zap_remove(spa->spa_meta_objset, vd->vdev_top_zap, | |
1871 | VDEV_TOP_ZAP_INDIRECT_OBSOLETE_SM, tx)); | |
1872 | space_map_close(vd->vdev_obsolete_sm); | |
1873 | vd->vdev_obsolete_sm = NULL; | |
1874 | spa_feature_decr(spa, SPA_FEATURE_OBSOLETE_COUNTS, tx); | |
1875 | } | |
1876 | for (int i = 0; i < TXG_SIZE; i++) { | |
1877 | ASSERT(list_is_empty(&svr->svr_new_segments[i])); | |
1878 | ASSERT3U(svr->svr_max_offset_to_sync[i], <=, | |
1879 | vdev_indirect_mapping_max_offset(vim)); | |
1880 | } | |
1881 | ||
1882 | for (uint64_t msi = 0; msi < vd->vdev_ms_count; msi++) { | |
1883 | metaslab_t *msp = vd->vdev_ms[msi]; | |
1884 | ||
1885 | if (msp->ms_start >= vdev_indirect_mapping_max_offset(vim)) | |
1886 | break; | |
1887 | ||
1888 | ASSERT0(range_tree_space(svr->svr_allocd_segs)); | |
1889 | ||
1890 | mutex_enter(&msp->ms_lock); | |
1891 | ||
1892 | /* | |
1893 | * Assert nothing in flight -- ms_*tree is empty. | |
1894 | */ | |
1895 | for (int i = 0; i < TXG_SIZE; i++) | |
d2734cce | 1896 | ASSERT0(range_tree_space(msp->ms_allocating[i])); |
a1d477c2 | 1897 | for (int i = 0; i < TXG_DEFER_SIZE; i++) |
d2734cce SD |
1898 | ASSERT0(range_tree_space(msp->ms_defer[i])); |
1899 | ASSERT0(range_tree_space(msp->ms_freed)); | |
a1d477c2 MA |
1900 | |
1901 | if (msp->ms_sm != NULL) { | |
a1d477c2 MA |
1902 | mutex_enter(&svr->svr_lock); |
1903 | VERIFY0(space_map_load(msp->ms_sm, | |
1904 | svr->svr_allocd_segs, SM_ALLOC)); | |
93e28d66 SD |
1905 | |
1906 | range_tree_walk(msp->ms_unflushed_allocs, | |
1907 | range_tree_add, svr->svr_allocd_segs); | |
1908 | range_tree_walk(msp->ms_unflushed_frees, | |
1909 | range_tree_remove, svr->svr_allocd_segs); | |
d2734cce | 1910 | range_tree_walk(msp->ms_freeing, |
a1d477c2 MA |
1911 | range_tree_remove, svr->svr_allocd_segs); |
1912 | ||
1913 | /* | |
1914 | * Clear everything past what has been synced, | |
1915 | * because we have not allocated mappings for it yet. | |
1916 | */ | |
1917 | uint64_t syncd = vdev_indirect_mapping_max_offset(vim); | |
9e052db4 MA |
1918 | uint64_t sm_end = msp->ms_sm->sm_start + |
1919 | msp->ms_sm->sm_size; | |
1920 | if (sm_end > syncd) | |
1921 | range_tree_clear(svr->svr_allocd_segs, | |
1922 | syncd, sm_end - syncd); | |
a1d477c2 MA |
1923 | |
1924 | mutex_exit(&svr->svr_lock); | |
1925 | } | |
1926 | mutex_exit(&msp->ms_lock); | |
1927 | ||
1928 | mutex_enter(&svr->svr_lock); | |
1929 | range_tree_vacate(svr->svr_allocd_segs, | |
1930 | free_mapped_segment_cb, vd); | |
1931 | mutex_exit(&svr->svr_lock); | |
1932 | } | |
1933 | ||
1934 | /* | |
1935 | * Note: this must happen after we invoke free_mapped_segment_cb, | |
1936 | * because it adds to the obsolete_segments. | |
1937 | */ | |
1938 | range_tree_vacate(vd->vdev_obsolete_segments, NULL, NULL); | |
1939 | ||
1940 | ASSERT3U(vic->vic_mapping_object, ==, | |
1941 | vdev_indirect_mapping_object(vd->vdev_indirect_mapping)); | |
1942 | vdev_indirect_mapping_close(vd->vdev_indirect_mapping); | |
1943 | vd->vdev_indirect_mapping = NULL; | |
1944 | vdev_indirect_mapping_free(mos, vic->vic_mapping_object, tx); | |
1945 | vic->vic_mapping_object = 0; | |
1946 | ||
1947 | ASSERT3U(vic->vic_births_object, ==, | |
1948 | vdev_indirect_births_object(vd->vdev_indirect_births)); | |
1949 | vdev_indirect_births_close(vd->vdev_indirect_births); | |
1950 | vd->vdev_indirect_births = NULL; | |
1951 | vdev_indirect_births_free(mos, vic->vic_births_object, tx); | |
1952 | vic->vic_births_object = 0; | |
1953 | ||
1954 | /* | |
1955 | * We may have processed some frees from the removing vdev in this | |
1956 | * txg, thus increasing svr_bytes_done; discard that here to | |
1957 | * satisfy the assertions in spa_vdev_removal_destroy(). | |
1958 | * Note that future txg's can not have any bytes_done, because | |
1959 | * future TXG's are only modified from open context, and we have | |
1960 | * already shut down the copying thread. | |
1961 | */ | |
1962 | svr->svr_bytes_done[dmu_tx_get_txg(tx) & TXG_MASK] = 0; | |
1963 | spa_finish_removal(spa, DSS_CANCELED, tx); | |
1964 | ||
1965 | vd->vdev_removing = B_FALSE; | |
2a673e76 AJ |
1966 | |
1967 | if (!vdev_prop_allocating_off(vd)) { | |
1968 | spa_config_enter(spa, SCL_ALLOC | SCL_VDEV, FTAG, RW_WRITER); | |
1969 | vdev_activate(vd); | |
1970 | spa_config_exit(spa, SCL_ALLOC | SCL_VDEV, FTAG); | |
1971 | } | |
1972 | ||
a1d477c2 MA |
1973 | vdev_config_dirty(vd); |
1974 | ||
1975 | zfs_dbgmsg("canceled device removal for vdev %llu in %llu", | |
8e739b2c | 1976 | (u_longlong_t)vd->vdev_id, (u_longlong_t)dmu_tx_get_txg(tx)); |
a1d477c2 MA |
1977 | spa_history_log_internal(spa, "vdev remove canceled", tx, |
1978 | "%s vdev %llu %s", spa_name(spa), | |
74756182 MM |
1979 | (u_longlong_t)vd->vdev_id, |
1980 | (vd->vdev_path != NULL) ? vd->vdev_path : "-"); | |
a1d477c2 MA |
1981 | } |
1982 | ||
7c9a4292 BB |
1983 | static int |
1984 | spa_vdev_remove_cancel_impl(spa_t *spa) | |
a1d477c2 | 1985 | { |
a1d477c2 | 1986 | int error = dsl_sync_task(spa->spa_name, spa_vdev_remove_cancel_check, |
d2734cce SD |
1987 | spa_vdev_remove_cancel_sync, NULL, 0, |
1988 | ZFS_SPACE_CHECK_EXTRA_RESERVED); | |
a1d477c2 MA |
1989 | return (error); |
1990 | } | |
1991 | ||
7c9a4292 BB |
1992 | int |
1993 | spa_vdev_remove_cancel(spa_t *spa) | |
1994 | { | |
1995 | spa_vdev_remove_suspend(spa); | |
1996 | ||
1997 | if (spa->spa_vdev_removal == NULL) | |
1998 | return (ENOTACTIVE); | |
1999 | ||
2000 | return (spa_vdev_remove_cancel_impl(spa)); | |
2001 | } | |
2002 | ||
a1d477c2 MA |
2003 | void |
2004 | svr_sync(spa_t *spa, dmu_tx_t *tx) | |
2005 | { | |
2006 | spa_vdev_removal_t *svr = spa->spa_vdev_removal; | |
2007 | int txgoff = dmu_tx_get_txg(tx) & TXG_MASK; | |
2008 | ||
8dc2197b SD |
2009 | if (svr == NULL) |
2010 | return; | |
2011 | ||
a1d477c2 MA |
2012 | /* |
2013 | * This check is necessary so that we do not dirty the | |
2014 | * DIRECTORY_OBJECT via spa_sync_removing_state() when there | |
2015 | * is nothing to do. Dirtying it every time would prevent us | |
2016 | * from syncing-to-convergence. | |
2017 | */ | |
2018 | if (svr->svr_bytes_done[txgoff] == 0) | |
2019 | return; | |
2020 | ||
2021 | /* | |
2022 | * Update progress accounting. | |
2023 | */ | |
2024 | spa->spa_removing_phys.sr_copied += svr->svr_bytes_done[txgoff]; | |
2025 | svr->svr_bytes_done[txgoff] = 0; | |
2026 | ||
2027 | spa_sync_removing_state(spa, tx); | |
2028 | } | |
2029 | ||
2030 | static void | |
2031 | vdev_remove_make_hole_and_free(vdev_t *vd) | |
2032 | { | |
2033 | uint64_t id = vd->vdev_id; | |
2034 | spa_t *spa = vd->vdev_spa; | |
2035 | vdev_t *rvd = spa->spa_root_vdev; | |
a1d477c2 MA |
2036 | |
2037 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
2038 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
2039 | ||
2040 | vdev_free(vd); | |
2041 | ||
93e28d66 SD |
2042 | vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); |
2043 | vdev_add_child(rvd, vd); | |
a1d477c2 MA |
2044 | vdev_config_dirty(rvd); |
2045 | ||
2046 | /* | |
2047 | * Reassess the health of our root vdev. | |
2048 | */ | |
2049 | vdev_reopen(rvd); | |
2050 | } | |
2051 | ||
2052 | /* | |
2053 | * Remove a log device. The config lock is held for the specified TXG. | |
2054 | */ | |
2055 | static int | |
2056 | spa_vdev_remove_log(vdev_t *vd, uint64_t *txg) | |
2057 | { | |
2058 | metaslab_group_t *mg = vd->vdev_mg; | |
2059 | spa_t *spa = vd->vdev_spa; | |
2060 | int error = 0; | |
2061 | ||
2062 | ASSERT(vd->vdev_islog); | |
2063 | ASSERT(vd == vd->vdev_top); | |
aa755b35 | 2064 | ASSERT3P(vd->vdev_log_mg, ==, NULL); |
6c926f42 | 2065 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
a1d477c2 MA |
2066 | |
2067 | /* | |
2068 | * Stop allocating from this vdev. | |
2069 | */ | |
2070 | metaslab_group_passivate(mg); | |
2071 | ||
2072 | /* | |
2073 | * Wait for the youngest allocations and frees to sync, | |
2074 | * and then wait for the deferral of those frees to finish. | |
2075 | */ | |
2076 | spa_vdev_config_exit(spa, NULL, | |
2077 | *txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); | |
2078 | ||
635a01aa BB |
2079 | /* |
2080 | * Cancel any initialize or TRIM which was in progress. | |
2081 | */ | |
2082 | vdev_initialize_stop_all(vd, VDEV_INITIALIZE_CANCELED); | |
2083 | vdev_trim_stop_all(vd, VDEV_TRIM_CANCELED); | |
2084 | vdev_autotrim_stop_wait(vd); | |
2085 | ||
a1d477c2 | 2086 | /* |
6c926f42 SD |
2087 | * Evacuate the device. We don't hold the config lock as |
2088 | * writer since we need to do I/O but we do keep the | |
a1d477c2 MA |
2089 | * spa_namespace_lock held. Once this completes the device |
2090 | * should no longer have any blocks allocated on it. | |
2091 | */ | |
6c926f42 SD |
2092 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
2093 | if (vd->vdev_stat.vs_alloc != 0) | |
2094 | error = spa_reset_logs(spa); | |
a1d477c2 MA |
2095 | |
2096 | *txg = spa_vdev_config_enter(spa); | |
2097 | ||
2098 | if (error != 0) { | |
2099 | metaslab_group_activate(mg); | |
aa755b35 | 2100 | ASSERT3P(vd->vdev_log_mg, ==, NULL); |
a1d477c2 MA |
2101 | return (error); |
2102 | } | |
2103 | ASSERT0(vd->vdev_stat.vs_alloc); | |
2104 | ||
2105 | /* | |
2106 | * The evacuation succeeded. Remove any remaining MOS metadata | |
2107 | * associated with this vdev, and wait for these changes to sync. | |
2108 | */ | |
2109 | vd->vdev_removing = B_TRUE; | |
2110 | ||
2111 | vdev_dirty_leaves(vd, VDD_DTL, *txg); | |
2112 | vdev_config_dirty(vd); | |
2113 | ||
93e28d66 SD |
2114 | /* |
2115 | * When the log space map feature is enabled we look at | |
2116 | * the vdev's top_zap to find the on-disk flush data of | |
2117 | * the metaslab we just flushed. Thus, while removing a | |
2118 | * log vdev we make sure to call vdev_metaslab_fini() | |
2119 | * first, which removes all metaslabs of this vdev from | |
2120 | * spa_metaslabs_by_flushed before vdev_remove_empty() | |
2121 | * destroys the top_zap of this log vdev. | |
2122 | * | |
2123 | * This avoids the scenario where we flush a metaslab | |
2124 | * from the log vdev being removed that doesn't have a | |
2125 | * top_zap and end up failing to lookup its on-disk flush | |
2126 | * data. | |
2127 | * | |
2128 | * We don't call metaslab_group_destroy() right away | |
2129 | * though (it will be called in vdev_free() later) as | |
2130 | * during metaslab_sync() of metaslabs from other vdevs | |
2131 | * we may touch the metaslab group of this vdev through | |
2132 | * metaslab_class_histogram_verify() | |
2133 | */ | |
6c926f42 SD |
2134 | vdev_metaslab_fini(vd); |
2135 | ||
a1d477c2 | 2136 | spa_vdev_config_exit(spa, NULL, *txg, 0, FTAG); |
a1d477c2 MA |
2137 | *txg = spa_vdev_config_enter(spa); |
2138 | ||
2139 | sysevent_t *ev = spa_event_create(spa, vd, NULL, | |
2140 | ESC_ZFS_VDEV_REMOVE_DEV); | |
2141 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
2142 | ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); | |
2143 | ||
2144 | /* The top ZAP should have been destroyed by vdev_remove_empty. */ | |
2145 | ASSERT0(vd->vdev_top_zap); | |
2146 | /* The leaf ZAP should have been destroyed by vdev_dtl_sync. */ | |
2147 | ASSERT0(vd->vdev_leaf_zap); | |
2148 | ||
2149 | (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); | |
2150 | ||
2151 | if (list_link_active(&vd->vdev_state_dirty_node)) | |
2152 | vdev_state_clean(vd); | |
2153 | if (list_link_active(&vd->vdev_config_dirty_node)) | |
2154 | vdev_config_clean(vd); | |
2155 | ||
6c926f42 SD |
2156 | ASSERT0(vd->vdev_stat.vs_alloc); |
2157 | ||
a1d477c2 MA |
2158 | /* |
2159 | * Clean up the vdev namespace. | |
2160 | */ | |
2161 | vdev_remove_make_hole_and_free(vd); | |
2162 | ||
2163 | if (ev != NULL) | |
2164 | spa_event_post(ev); | |
2165 | ||
2166 | return (0); | |
2167 | } | |
2168 | ||
2169 | static int | |
2170 | spa_vdev_remove_top_check(vdev_t *vd) | |
2171 | { | |
2172 | spa_t *spa = vd->vdev_spa; | |
2173 | ||
2174 | if (vd != vd->vdev_top) | |
2175 | return (SET_ERROR(ENOTSUP)); | |
2176 | ||
fcd37b62 | 2177 | if (!vdev_is_concrete(vd)) |
2178 | return (SET_ERROR(ENOTSUP)); | |
2179 | ||
a1d477c2 MA |
2180 | if (!spa_feature_is_enabled(spa, SPA_FEATURE_DEVICE_REMOVAL)) |
2181 | return (SET_ERROR(ENOTSUP)); | |
2182 | ||
2a673e76 AJ |
2183 | /* |
2184 | * This device is already being removed | |
2185 | */ | |
2186 | if (vd->vdev_removing) | |
2187 | return (SET_ERROR(EALREADY)); | |
cc99f275 DB |
2188 | |
2189 | metaslab_class_t *mc = vd->vdev_mg->mg_class; | |
71e4ce0e MA |
2190 | metaslab_class_t *normal = spa_normal_class(spa); |
2191 | if (mc != normal) { | |
2192 | /* | |
2193 | * Space allocated from the special (or dedup) class is | |
2194 | * included in the DMU's space usage, but it's not included | |
2195 | * in spa_dspace (or dsl_pool_adjustedsize()). Therefore | |
2196 | * there is always at least as much free space in the normal | |
2197 | * class, as is allocated from the special (and dedup) class. | |
2198 | * As a backup check, we will return ENOSPC if this is | |
2199 | * violated. See also spa_update_dspace(). | |
2200 | */ | |
2201 | uint64_t available = metaslab_class_get_space(normal) - | |
2202 | metaslab_class_get_alloc(normal); | |
2203 | ASSERT3U(available, >=, vd->vdev_stat.vs_alloc); | |
2204 | if (available < vd->vdev_stat.vs_alloc) | |
2205 | return (SET_ERROR(ENOSPC)); | |
2a673e76 | 2206 | } else if (!vd->vdev_noalloc) { |
71e4ce0e MA |
2207 | /* available space in the pool's normal class */ |
2208 | uint64_t available = dsl_dir_space_available( | |
2209 | spa->spa_dsl_pool->dp_root_dir, NULL, 0, B_TRUE); | |
2a673e76 | 2210 | if (available < vd->vdev_stat.vs_dspace) |
71e4ce0e | 2211 | return (SET_ERROR(ENOSPC)); |
a1d477c2 MA |
2212 | } |
2213 | ||
2214 | /* | |
2215 | * There can not be a removal in progress. | |
2216 | */ | |
2217 | if (spa->spa_removing_phys.sr_state == DSS_SCANNING) | |
2218 | return (SET_ERROR(EBUSY)); | |
2219 | ||
2220 | /* | |
2221 | * The device must have all its data. | |
2222 | */ | |
2223 | if (!vdev_dtl_empty(vd, DTL_MISSING) || | |
2224 | !vdev_dtl_empty(vd, DTL_OUTAGE)) | |
2225 | return (SET_ERROR(EBUSY)); | |
2226 | ||
2227 | /* | |
2228 | * The device must be healthy. | |
2229 | */ | |
2230 | if (!vdev_readable(vd)) | |
2231 | return (SET_ERROR(EIO)); | |
2232 | ||
2233 | /* | |
2234 | * All vdevs in normal class must have the same ashift. | |
2235 | */ | |
2236 | if (spa->spa_max_ashift != spa->spa_min_ashift) { | |
2237 | return (SET_ERROR(EINVAL)); | |
2238 | } | |
2239 | ||
dff71c79 DB |
2240 | /* |
2241 | * A removed special/dedup vdev must have same ashift as normal class. | |
2242 | */ | |
2243 | ASSERT(!vd->vdev_islog); | |
2244 | if (vd->vdev_alloc_bias != VDEV_BIAS_NONE && | |
2245 | vd->vdev_ashift != spa->spa_max_ashift) { | |
2246 | return (SET_ERROR(EINVAL)); | |
2247 | } | |
2248 | ||
a1d477c2 MA |
2249 | /* |
2250 | * All vdevs in normal class must have the same ashift | |
b2255edc | 2251 | * and not be raidz or draid. |
a1d477c2 MA |
2252 | */ |
2253 | vdev_t *rvd = spa->spa_root_vdev; | |
a1d477c2 MA |
2254 | for (uint64_t id = 0; id < rvd->vdev_children; id++) { |
2255 | vdev_t *cvd = rvd->vdev_child[id]; | |
dff71c79 DB |
2256 | |
2257 | /* | |
2258 | * A removed special/dedup vdev must have the same ashift | |
2259 | * across all vdevs in its class. | |
2260 | */ | |
2261 | if (vd->vdev_alloc_bias != VDEV_BIAS_NONE && | |
2262 | cvd->vdev_alloc_bias == vd->vdev_alloc_bias && | |
2263 | cvd->vdev_ashift != vd->vdev_ashift) { | |
2264 | return (SET_ERROR(EINVAL)); | |
2265 | } | |
2266 | if (cvd->vdev_ashift != 0 && | |
2267 | cvd->vdev_alloc_bias == VDEV_BIAS_NONE) | |
a1d477c2 | 2268 | ASSERT3U(cvd->vdev_ashift, ==, spa->spa_max_ashift); |
a1d477c2 MA |
2269 | if (!vdev_is_concrete(cvd)) |
2270 | continue; | |
b2255edc | 2271 | if (vdev_get_nparity(cvd) != 0) |
a1d477c2 MA |
2272 | return (SET_ERROR(EINVAL)); |
2273 | /* | |
2274 | * Need the mirror to be mirror of leaf vdevs only | |
2275 | */ | |
2276 | if (cvd->vdev_ops == &vdev_mirror_ops) { | |
2277 | for (uint64_t cid = 0; | |
2278 | cid < cvd->vdev_children; cid++) { | |
2279 | if (!cvd->vdev_child[cid]->vdev_ops-> | |
2280 | vdev_op_leaf) | |
2281 | return (SET_ERROR(EINVAL)); | |
2282 | } | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | return (0); | |
2287 | } | |
2288 | ||
2289 | /* | |
2290 | * Initiate removal of a top-level vdev, reducing the total space in the pool. | |
2291 | * The config lock is held for the specified TXG. Once initiated, | |
2292 | * evacuation of all allocated space (copying it to other vdevs) happens | |
2293 | * in the background (see spa_vdev_remove_thread()), and can be canceled | |
2294 | * (see spa_vdev_remove_cancel()). If successful, the vdev will | |
2295 | * be transformed to an indirect vdev (see spa_vdev_remove_complete()). | |
2296 | */ | |
2297 | static int | |
2298 | spa_vdev_remove_top(vdev_t *vd, uint64_t *txg) | |
2299 | { | |
2300 | spa_t *spa = vd->vdev_spa; | |
2a673e76 | 2301 | boolean_t set_noalloc = B_FALSE; |
a1d477c2 MA |
2302 | int error; |
2303 | ||
2304 | /* | |
2305 | * Check for errors up-front, so that we don't waste time | |
2306 | * passivating the metaslab group and clearing the ZIL if there | |
2307 | * are errors. | |
2308 | */ | |
2309 | error = spa_vdev_remove_top_check(vd); | |
a1d477c2 MA |
2310 | |
2311 | /* | |
2312 | * Stop allocating from this vdev. Note that we must check | |
2313 | * that this is not the only device in the pool before | |
2314 | * passivating, otherwise we will not be able to make | |
2315 | * progress because we can't allocate from any vdevs. | |
2316 | * The above check for sufficient free space serves this | |
2317 | * purpose. | |
2318 | */ | |
2a673e76 AJ |
2319 | if (error == 0 && !vd->vdev_noalloc) { |
2320 | set_noalloc = B_TRUE; | |
2321 | error = vdev_passivate(vd, txg); | |
2322 | } | |
a1d477c2 | 2323 | |
2a673e76 AJ |
2324 | if (error != 0) |
2325 | return (error); | |
a1d477c2 | 2326 | |
619f0976 | 2327 | /* |
1b939560 BB |
2328 | * We stop any initializing and TRIM that is currently in progress |
2329 | * but leave the state as "active". This will allow the process to | |
2330 | * resume if the removal is canceled sometime later. | |
619f0976 | 2331 | */ |
2a673e76 AJ |
2332 | |
2333 | spa_vdev_config_exit(spa, NULL, *txg, 0, FTAG); | |
2334 | ||
619f0976 | 2335 | vdev_initialize_stop_all(vd, VDEV_INITIALIZE_ACTIVE); |
1b939560 BB |
2336 | vdev_trim_stop_all(vd, VDEV_TRIM_ACTIVE); |
2337 | vdev_autotrim_stop_wait(vd); | |
619f0976 | 2338 | |
a1d477c2 MA |
2339 | *txg = spa_vdev_config_enter(spa); |
2340 | ||
2341 | /* | |
2342 | * Things might have changed while the config lock was dropped | |
2343 | * (e.g. space usage). Check for errors again. | |
2344 | */ | |
2a673e76 | 2345 | error = spa_vdev_remove_top_check(vd); |
a1d477c2 MA |
2346 | |
2347 | if (error != 0) { | |
2a673e76 AJ |
2348 | if (set_noalloc) |
2349 | vdev_activate(vd); | |
619f0976 | 2350 | spa_async_request(spa, SPA_ASYNC_INITIALIZE_RESTART); |
1b939560 BB |
2351 | spa_async_request(spa, SPA_ASYNC_TRIM_RESTART); |
2352 | spa_async_request(spa, SPA_ASYNC_AUTOTRIM_RESTART); | |
a1d477c2 MA |
2353 | return (error); |
2354 | } | |
2355 | ||
2356 | vd->vdev_removing = B_TRUE; | |
2357 | ||
2358 | vdev_dirty_leaves(vd, VDD_DTL, *txg); | |
2359 | vdev_config_dirty(vd); | |
2360 | dmu_tx_t *tx = dmu_tx_create_assigned(spa->spa_dsl_pool, *txg); | |
2361 | dsl_sync_task_nowait(spa->spa_dsl_pool, | |
38080324 | 2362 | vdev_remove_initiate_sync, (void *)(uintptr_t)vd->vdev_id, tx); |
a1d477c2 MA |
2363 | dmu_tx_commit(tx); |
2364 | ||
2365 | return (0); | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * Remove a device from the pool. | |
2370 | * | |
2371 | * Removing a device from the vdev namespace requires several steps | |
2372 | * and can take a significant amount of time. As a result we use | |
2373 | * the spa_vdev_config_[enter/exit] functions which allow us to | |
2374 | * grab and release the spa_config_lock while still holding the namespace | |
2375 | * lock. During each step the configuration is synced out. | |
2376 | */ | |
2377 | int | |
2378 | spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
2379 | { | |
2380 | vdev_t *vd; | |
2381 | nvlist_t **spares, **l2cache, *nv; | |
2382 | uint64_t txg = 0; | |
2383 | uint_t nspares, nl2cache; | |
c048ddaf | 2384 | int error = 0, error_log; |
a1d477c2 MA |
2385 | boolean_t locked = MUTEX_HELD(&spa_namespace_lock); |
2386 | sysevent_t *ev = NULL; | |
a926aab9 AZ |
2387 | const char *vd_type = NULL; |
2388 | char *vd_path = NULL; | |
a1d477c2 MA |
2389 | |
2390 | ASSERT(spa_writeable(spa)); | |
2391 | ||
2392 | if (!locked) | |
2393 | txg = spa_vdev_enter(spa); | |
2394 | ||
d2734cce SD |
2395 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
2396 | if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { | |
2397 | error = (spa_has_checkpoint(spa)) ? | |
2398 | ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; | |
2399 | ||
2400 | if (!locked) | |
2401 | return (spa_vdev_exit(spa, NULL, txg, error)); | |
2402 | ||
2403 | return (error); | |
2404 | } | |
2405 | ||
a1d477c2 MA |
2406 | vd = spa_lookup_by_guid(spa, guid, B_FALSE); |
2407 | ||
2408 | if (spa->spa_spares.sav_vdevs != NULL && | |
2409 | nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, | |
2410 | ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && | |
2411 | (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { | |
2412 | /* | |
2413 | * Only remove the hot spare if it's not currently in use | |
2414 | * in this pool. | |
2415 | */ | |
2416 | if (vd == NULL || unspare) { | |
d1807f16 | 2417 | const char *type; |
b2255edc BB |
2418 | boolean_t draid_spare = B_FALSE; |
2419 | ||
2420 | if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) | |
2421 | == 0 && strcmp(type, VDEV_TYPE_DRAID_SPARE) == 0) | |
2422 | draid_spare = B_TRUE; | |
2423 | ||
2424 | if (vd == NULL && draid_spare) { | |
2425 | error = SET_ERROR(ENOTSUP); | |
2426 | } else { | |
2427 | if (vd == NULL) | |
2428 | vd = spa_lookup_by_guid(spa, | |
2429 | guid, B_TRUE); | |
2430 | ev = spa_event_create(spa, vd, NULL, | |
2431 | ESC_ZFS_VDEV_REMOVE_AUX); | |
2432 | ||
2433 | vd_type = VDEV_TYPE_SPARE; | |
2434 | vd_path = spa_strdup(fnvlist_lookup_string( | |
2435 | nv, ZPOOL_CONFIG_PATH)); | |
2436 | spa_vdev_remove_aux(spa->spa_spares.sav_config, | |
2437 | ZPOOL_CONFIG_SPARES, spares, nspares, nv); | |
2438 | spa_load_spares(spa); | |
2439 | spa->spa_spares.sav_sync = B_TRUE; | |
2440 | } | |
a1d477c2 MA |
2441 | } else { |
2442 | error = SET_ERROR(EBUSY); | |
2443 | } | |
2444 | } else if (spa->spa_l2cache.sav_vdevs != NULL && | |
2445 | nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, | |
2446 | ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && | |
2447 | (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { | |
fedef6dd | 2448 | vd_type = VDEV_TYPE_L2CACHE; |
9bb0d89c MA |
2449 | vd_path = spa_strdup(fnvlist_lookup_string( |
2450 | nv, ZPOOL_CONFIG_PATH)); | |
a1d477c2 MA |
2451 | /* |
2452 | * Cache devices can always be removed. | |
2453 | */ | |
2454 | vd = spa_lookup_by_guid(spa, guid, B_TRUE); | |
b7654bd7 GA |
2455 | |
2456 | /* | |
2457 | * Stop trimming the cache device. We need to release the | |
2458 | * config lock to allow the syncing of TRIM transactions | |
2459 | * without releasing the spa_namespace_lock. The same | |
2460 | * strategy is employed in spa_vdev_remove_top(). | |
2461 | */ | |
2462 | spa_vdev_config_exit(spa, NULL, | |
2463 | txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); | |
2464 | mutex_enter(&vd->vdev_trim_lock); | |
2465 | vdev_trim_stop(vd, VDEV_TRIM_CANCELED, NULL); | |
2466 | mutex_exit(&vd->vdev_trim_lock); | |
2467 | txg = spa_vdev_config_enter(spa); | |
2468 | ||
a1d477c2 MA |
2469 | ev = spa_event_create(spa, vd, NULL, ESC_ZFS_VDEV_REMOVE_AUX); |
2470 | spa_vdev_remove_aux(spa->spa_l2cache.sav_config, | |
2471 | ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); | |
2472 | spa_load_l2cache(spa); | |
2473 | spa->spa_l2cache.sav_sync = B_TRUE; | |
2474 | } else if (vd != NULL && vd->vdev_islog) { | |
2475 | ASSERT(!locked); | |
c048ddaf | 2476 | vd_type = VDEV_TYPE_LOG; |
9bb0d89c MA |
2477 | vd_path = spa_strdup((vd->vdev_path != NULL) ? |
2478 | vd->vdev_path : "-"); | |
a1d477c2 MA |
2479 | error = spa_vdev_remove_log(vd, &txg); |
2480 | } else if (vd != NULL) { | |
2481 | ASSERT(!locked); | |
2482 | error = spa_vdev_remove_top(vd, &txg); | |
2483 | } else { | |
2484 | /* | |
2485 | * There is no vdev of any kind with the specified guid. | |
2486 | */ | |
2487 | error = SET_ERROR(ENOENT); | |
2488 | } | |
2489 | ||
c048ddaf I |
2490 | error_log = error; |
2491 | ||
a1d477c2 MA |
2492 | if (!locked) |
2493 | error = spa_vdev_exit(spa, NULL, txg, error); | |
2494 | ||
fedef6dd TC |
2495 | /* |
2496 | * Logging must be done outside the spa config lock. Otherwise, | |
2497 | * this code path could end up holding the spa config lock while | |
2498 | * waiting for a txg_sync so it can write to the internal log. | |
2499 | * Doing that would prevent the txg sync from actually happening, | |
2500 | * causing a deadlock. | |
2501 | */ | |
9bb0d89c | 2502 | if (error_log == 0 && vd_type != NULL && vd_path != NULL) { |
fedef6dd | 2503 | spa_history_log_internal(spa, "vdev remove", NULL, |
9bb0d89c | 2504 | "%s vdev (%s) %s", spa_name(spa), vd_type, vd_path); |
fedef6dd | 2505 | } |
9bb0d89c MA |
2506 | if (vd_path != NULL) |
2507 | spa_strfree(vd_path); | |
fedef6dd | 2508 | |
a1d477c2 MA |
2509 | if (ev != NULL) |
2510 | spa_event_post(ev); | |
2511 | ||
2512 | return (error); | |
2513 | } | |
2514 | ||
2515 | int | |
2516 | spa_removal_get_stats(spa_t *spa, pool_removal_stat_t *prs) | |
2517 | { | |
2518 | prs->prs_state = spa->spa_removing_phys.sr_state; | |
2519 | ||
2520 | if (prs->prs_state == DSS_NONE) | |
2521 | return (SET_ERROR(ENOENT)); | |
2522 | ||
2523 | prs->prs_removing_vdev = spa->spa_removing_phys.sr_removing_vdev; | |
2524 | prs->prs_start_time = spa->spa_removing_phys.sr_start_time; | |
2525 | prs->prs_end_time = spa->spa_removing_phys.sr_end_time; | |
2526 | prs->prs_to_copy = spa->spa_removing_phys.sr_to_copy; | |
2527 | prs->prs_copied = spa->spa_removing_phys.sr_copied; | |
2528 | ||
a1d477c2 MA |
2529 | prs->prs_mapping_memory = 0; |
2530 | uint64_t indirect_vdev_id = | |
2531 | spa->spa_removing_phys.sr_prev_indirect_vdev; | |
2532 | while (indirect_vdev_id != -1) { | |
2533 | vdev_t *vd = spa->spa_root_vdev->vdev_child[indirect_vdev_id]; | |
2534 | vdev_indirect_config_t *vic = &vd->vdev_indirect_config; | |
2535 | vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; | |
2536 | ||
2537 | ASSERT3P(vd->vdev_ops, ==, &vdev_indirect_ops); | |
2538 | prs->prs_mapping_memory += vdev_indirect_mapping_size(vim); | |
2539 | indirect_vdev_id = vic->vic_prev_indirect_vdev; | |
2540 | } | |
2541 | ||
2542 | return (0); | |
2543 | } | |
2544 | ||
03fdcb9a | 2545 | ZFS_MODULE_PARAM(zfs_vdev, zfs_, removal_ignore_errors, INT, ZMOD_RW, |
7c9a4292 BB |
2546 | "Ignore hard IO errors when removing device"); |
2547 | ||
fdc2d303 | 2548 | ZFS_MODULE_PARAM(zfs_vdev, zfs_, remove_max_segment, UINT, ZMOD_RW, |
a1d477c2 MA |
2549 | "Largest contiguous segment to allocate when removing device"); |
2550 | ||
fdc2d303 | 2551 | ZFS_MODULE_PARAM(zfs_vdev, vdev_, removal_max_span, UINT, ZMOD_RW, |
0dc2f70c MA |
2552 | "Largest span of free chunks a remap segment can span"); |
2553 | ||
7ada752a | 2554 | /* BEGIN CSTYLED */ |
fdc2d303 | 2555 | ZFS_MODULE_PARAM(zfs_vdev, zfs_, removal_suspend_progress, UINT, ZMOD_RW, |
d2734cce SD |
2556 | "Pause device removal after this many bytes are copied " |
2557 | "(debug use only - causes removal to hang)"); | |
2558 | /* END CSTYLED */ | |
2559 | ||
a1d477c2 MA |
2560 | EXPORT_SYMBOL(free_from_removing_vdev); |
2561 | EXPORT_SYMBOL(spa_removal_get_stats); | |
2562 | EXPORT_SYMBOL(spa_remove_init); | |
2563 | EXPORT_SYMBOL(spa_restart_removal); | |
2564 | EXPORT_SYMBOL(spa_vdev_removal_destroy); | |
2565 | EXPORT_SYMBOL(spa_vdev_remove); | |
2566 | EXPORT_SYMBOL(spa_vdev_remove_cancel); | |
2567 | EXPORT_SYMBOL(spa_vdev_remove_suspend); | |
2568 | EXPORT_SYMBOL(svr_sync); |