Commit | Line | Data |
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1c6fdbd8 KO |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * bcachefs setup/teardown code, and some metadata io - read a superblock and | |
4 | * figure out what to do with it. | |
5 | * | |
6 | * Copyright 2010, 2011 Kent Overstreet <kent.overstreet@gmail.com> | |
7 | * Copyright 2012 Google, Inc. | |
8 | */ | |
9 | ||
10 | #include "bcachefs.h" | |
7b3f84ea KO |
11 | #include "alloc_background.h" |
12 | #include "alloc_foreground.h" | |
5b8a9227 | 13 | #include "bkey_sort.h" |
1c6fdbd8 KO |
14 | #include "btree_cache.h" |
15 | #include "btree_gc.h" | |
2ca88e5a | 16 | #include "btree_key_cache.h" |
1c6fdbd8 KO |
17 | #include "btree_update_interior.h" |
18 | #include "btree_io.h" | |
19 | #include "chardev.h" | |
20 | #include "checksum.h" | |
21 | #include "clock.h" | |
22 | #include "compress.h" | |
23 | #include "debug.h" | |
24 | #include "disk_groups.h" | |
cd575ddf | 25 | #include "ec.h" |
1c6fdbd8 KO |
26 | #include "error.h" |
27 | #include "fs.h" | |
28 | #include "fs-io.h" | |
29 | #include "fsck.h" | |
30 | #include "inode.h" | |
31 | #include "io.h" | |
32 | #include "journal.h" | |
33 | #include "journal_reclaim.h" | |
1dd7f9d9 | 34 | #include "journal_seq_blacklist.h" |
1c6fdbd8 KO |
35 | #include "move.h" |
36 | #include "migrate.h" | |
37 | #include "movinggc.h" | |
38 | #include "quota.h" | |
39 | #include "rebalance.h" | |
40 | #include "recovery.h" | |
41 | #include "replicas.h" | |
42 | #include "super.h" | |
43 | #include "super-io.h" | |
44 | #include "sysfs.h" | |
45 | #include "trace.h" | |
46 | ||
47 | #include <linux/backing-dev.h> | |
48 | #include <linux/blkdev.h> | |
49 | #include <linux/debugfs.h> | |
50 | #include <linux/device.h> | |
51 | #include <linux/idr.h> | |
1c6fdbd8 KO |
52 | #include <linux/module.h> |
53 | #include <linux/percpu.h> | |
54 | #include <linux/random.h> | |
55 | #include <linux/sysfs.h> | |
56 | #include <crypto/hash.h> | |
57 | ||
58 | MODULE_LICENSE("GPL"); | |
59 | MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>"); | |
60 | ||
61 | #define KTYPE(type) \ | |
62 | static const struct attribute_group type ## _group = { \ | |
63 | .attrs = type ## _files \ | |
64 | }; \ | |
65 | \ | |
66 | static const struct attribute_group *type ## _groups[] = { \ | |
67 | &type ## _group, \ | |
68 | NULL \ | |
69 | }; \ | |
70 | \ | |
71 | static const struct kobj_type type ## _ktype = { \ | |
72 | .release = type ## _release, \ | |
73 | .sysfs_ops = &type ## _sysfs_ops, \ | |
74 | .default_groups = type ## _groups \ | |
75 | } | |
76 | ||
77 | static void bch2_fs_release(struct kobject *); | |
78 | static void bch2_dev_release(struct kobject *); | |
79 | ||
80 | static void bch2_fs_internal_release(struct kobject *k) | |
81 | { | |
82 | } | |
83 | ||
84 | static void bch2_fs_opts_dir_release(struct kobject *k) | |
85 | { | |
86 | } | |
87 | ||
88 | static void bch2_fs_time_stats_release(struct kobject *k) | |
89 | { | |
90 | } | |
91 | ||
92 | KTYPE(bch2_fs); | |
93 | KTYPE(bch2_fs_internal); | |
94 | KTYPE(bch2_fs_opts_dir); | |
95 | KTYPE(bch2_fs_time_stats); | |
96 | KTYPE(bch2_dev); | |
97 | ||
98 | static struct kset *bcachefs_kset; | |
99 | static LIST_HEAD(bch_fs_list); | |
100 | static DEFINE_MUTEX(bch_fs_list_lock); | |
101 | ||
102 | static DECLARE_WAIT_QUEUE_HEAD(bch_read_only_wait); | |
103 | ||
104 | static void bch2_dev_free(struct bch_dev *); | |
105 | static int bch2_dev_alloc(struct bch_fs *, unsigned); | |
106 | static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *); | |
107 | static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *); | |
108 | ||
109 | struct bch_fs *bch2_dev_to_fs(dev_t dev) | |
110 | { | |
111 | struct bch_fs *c; | |
112 | struct bch_dev *ca; | |
113 | unsigned i; | |
114 | ||
115 | mutex_lock(&bch_fs_list_lock); | |
116 | rcu_read_lock(); | |
117 | ||
118 | list_for_each_entry(c, &bch_fs_list, list) | |
119 | for_each_member_device_rcu(ca, c, i, NULL) | |
120 | if (ca->disk_sb.bdev->bd_dev == dev) { | |
121 | closure_get(&c->cl); | |
122 | goto found; | |
123 | } | |
124 | c = NULL; | |
125 | found: | |
126 | rcu_read_unlock(); | |
127 | mutex_unlock(&bch_fs_list_lock); | |
128 | ||
129 | return c; | |
130 | } | |
131 | ||
132 | static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid) | |
133 | { | |
134 | struct bch_fs *c; | |
135 | ||
136 | lockdep_assert_held(&bch_fs_list_lock); | |
137 | ||
138 | list_for_each_entry(c, &bch_fs_list, list) | |
139 | if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid))) | |
140 | return c; | |
141 | ||
142 | return NULL; | |
143 | } | |
144 | ||
145 | struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid) | |
146 | { | |
147 | struct bch_fs *c; | |
148 | ||
149 | mutex_lock(&bch_fs_list_lock); | |
150 | c = __bch2_uuid_to_fs(uuid); | |
151 | if (c) | |
152 | closure_get(&c->cl); | |
153 | mutex_unlock(&bch_fs_list_lock); | |
154 | ||
155 | return c; | |
156 | } | |
157 | ||
180fb49d KO |
158 | static void bch2_dev_usage_journal_reserve(struct bch_fs *c) |
159 | { | |
160 | struct bch_dev *ca; | |
161 | unsigned i, nr = 0, u64s = | |
4b8f89af KO |
162 | ((sizeof(struct jset_entry_dev_usage) + |
163 | sizeof(struct jset_entry_dev_usage_type) * BCH_DATA_NR)) / | |
164 | sizeof(u64); | |
180fb49d KO |
165 | |
166 | rcu_read_lock(); | |
167 | for_each_member_device_rcu(ca, c, i, NULL) | |
168 | nr++; | |
169 | rcu_read_unlock(); | |
170 | ||
171 | bch2_journal_entry_res_resize(&c->journal, | |
172 | &c->dev_usage_journal_res, u64s * nr); | |
173 | } | |
174 | ||
1c6fdbd8 KO |
175 | /* Filesystem RO/RW: */ |
176 | ||
177 | /* | |
178 | * For startup/shutdown of RW stuff, the dependencies are: | |
179 | * | |
180 | * - foreground writes depend on copygc and rebalance (to free up space) | |
181 | * | |
182 | * - copygc and rebalance depend on mark and sweep gc (they actually probably | |
183 | * don't because they either reserve ahead of time or don't block if | |
184 | * allocations fail, but allocations can require mark and sweep gc to run | |
185 | * because of generation number wraparound) | |
186 | * | |
187 | * - all of the above depends on the allocator threads | |
188 | * | |
189 | * - allocator depends on the journal (when it rewrites prios and gens) | |
190 | */ | |
191 | ||
192 | static void __bch2_fs_read_only(struct bch_fs *c) | |
193 | { | |
194 | struct bch_dev *ca; | |
d5f70c1f | 195 | unsigned i, clean_passes = 0; |
1c6fdbd8 KO |
196 | |
197 | bch2_rebalance_stop(c); | |
e6d11615 | 198 | bch2_copygc_stop(c); |
1c6fdbd8 KO |
199 | bch2_gc_thread_stop(c); |
200 | ||
201 | /* | |
202 | * Flush journal before stopping allocators, because flushing journal | |
203 | * blacklist entries involves allocating new btree nodes: | |
204 | */ | |
205 | bch2_journal_flush_all_pins(&c->journal); | |
206 | ||
2340fd9d KO |
207 | /* |
208 | * If the allocator threads didn't all start up, the btree updates to | |
209 | * write out alloc info aren't going to work: | |
210 | */ | |
b935a8a6 | 211 | if (!test_bit(BCH_FS_ALLOCATOR_RUNNING, &c->flags)) |
2340fd9d | 212 | goto nowrote_alloc; |
b935a8a6 | 213 | |
039fc4c5 | 214 | bch_verbose(c, "flushing journal and stopping allocators"); |
460651ee | 215 | |
039fc4c5 KO |
216 | bch2_journal_flush_all_pins(&c->journal); |
217 | set_bit(BCH_FS_ALLOCATOR_STOPPING, &c->flags); | |
61c8d7c8 | 218 | |
039fc4c5 KO |
219 | do { |
220 | clean_passes++; | |
430735cd | 221 | |
039fc4c5 KO |
222 | if (bch2_journal_flush_all_pins(&c->journal)) |
223 | clean_passes = 0; | |
430735cd KO |
224 | |
225 | /* | |
039fc4c5 KO |
226 | * In flight interior btree updates will generate more journal |
227 | * updates and btree updates (alloc btree): | |
430735cd | 228 | */ |
039fc4c5 KO |
229 | if (bch2_btree_interior_updates_nr_pending(c)) { |
230 | closure_wait_event(&c->btree_interior_update_wait, | |
231 | !bch2_btree_interior_updates_nr_pending(c)); | |
232 | clean_passes = 0; | |
233 | } | |
00b8ccf7 | 234 | flush_work(&c->btree_interior_update_work); |
d5f70c1f | 235 | |
039fc4c5 KO |
236 | if (bch2_journal_flush_all_pins(&c->journal)) |
237 | clean_passes = 0; | |
d5f70c1f | 238 | } while (clean_passes < 2); |
039fc4c5 | 239 | bch_verbose(c, "flushing journal and stopping allocators complete"); |
2340fd9d KO |
240 | |
241 | set_bit(BCH_FS_ALLOC_CLEAN, &c->flags); | |
242 | nowrote_alloc: | |
00b8ccf7 KO |
243 | closure_wait_event(&c->btree_interior_update_wait, |
244 | !bch2_btree_interior_updates_nr_pending(c)); | |
245 | flush_work(&c->btree_interior_update_work); | |
246 | ||
1c6fdbd8 KO |
247 | for_each_member_device(ca, c, i) |
248 | bch2_dev_allocator_stop(ca); | |
249 | ||
b935a8a6 | 250 | clear_bit(BCH_FS_ALLOCATOR_RUNNING, &c->flags); |
039fc4c5 | 251 | clear_bit(BCH_FS_ALLOCATOR_STOPPING, &c->flags); |
b935a8a6 | 252 | |
1c6fdbd8 KO |
253 | bch2_fs_journal_stop(&c->journal); |
254 | ||
255 | /* | |
256 | * the journal kicks off btree writes via reclaim - wait for in flight | |
257 | * writes after stopping journal: | |
258 | */ | |
a5cd80ea | 259 | bch2_btree_flush_all_writes(c); |
1c6fdbd8 KO |
260 | |
261 | /* | |
262 | * After stopping journal: | |
263 | */ | |
264 | for_each_member_device(ca, c, i) | |
265 | bch2_dev_allocator_remove(c, ca); | |
266 | } | |
267 | ||
268 | static void bch2_writes_disabled(struct percpu_ref *writes) | |
269 | { | |
270 | struct bch_fs *c = container_of(writes, struct bch_fs, writes); | |
271 | ||
272 | set_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
273 | wake_up(&bch_read_only_wait); | |
274 | } | |
275 | ||
276 | void bch2_fs_read_only(struct bch_fs *c) | |
277 | { | |
134915f3 | 278 | if (!test_bit(BCH_FS_RW, &c->flags)) { |
b7a9bbfc | 279 | BUG_ON(c->journal.reclaim_thread); |
1c6fdbd8 | 280 | return; |
134915f3 | 281 | } |
1c6fdbd8 KO |
282 | |
283 | BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
284 | ||
285 | /* | |
286 | * Block new foreground-end write operations from starting - any new | |
287 | * writes will return -EROFS: | |
288 | * | |
289 | * (This is really blocking new _allocations_, writes to previously | |
290 | * allocated space can still happen until stopping the allocator in | |
291 | * bch2_dev_allocator_stop()). | |
292 | */ | |
293 | percpu_ref_kill(&c->writes); | |
294 | ||
f516c872 | 295 | cancel_work_sync(&c->ec_stripe_delete_work); |
1c6fdbd8 KO |
296 | |
297 | /* | |
298 | * If we're not doing an emergency shutdown, we want to wait on | |
299 | * outstanding writes to complete so they don't see spurious errors due | |
300 | * to shutting down the allocator: | |
301 | * | |
302 | * If we are doing an emergency shutdown outstanding writes may | |
303 | * hang until we shutdown the allocator so we don't want to wait | |
304 | * on outstanding writes before shutting everything down - but | |
305 | * we do need to wait on them before returning and signalling | |
306 | * that going RO is complete: | |
307 | */ | |
308 | wait_event(bch_read_only_wait, | |
309 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) || | |
310 | test_bit(BCH_FS_EMERGENCY_RO, &c->flags)); | |
311 | ||
312 | __bch2_fs_read_only(c); | |
313 | ||
314 | wait_event(bch_read_only_wait, | |
315 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
316 | ||
317 | clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
318 | ||
319 | if (!bch2_journal_error(&c->journal) && | |
320 | !test_bit(BCH_FS_ERROR, &c->flags) && | |
3aea4342 | 321 | !test_bit(BCH_FS_EMERGENCY_RO, &c->flags) && |
a0e0bda1 | 322 | test_bit(BCH_FS_STARTED, &c->flags) && |
2340fd9d | 323 | test_bit(BCH_FS_ALLOC_CLEAN, &c->flags) && |
b2930396 KO |
324 | !c->opts.norecovery) { |
325 | bch_verbose(c, "marking filesystem clean"); | |
134915f3 | 326 | bch2_fs_mark_clean(c); |
b2930396 | 327 | } |
1c6fdbd8 | 328 | |
134915f3 | 329 | clear_bit(BCH_FS_RW, &c->flags); |
1c6fdbd8 KO |
330 | } |
331 | ||
332 | static void bch2_fs_read_only_work(struct work_struct *work) | |
333 | { | |
334 | struct bch_fs *c = | |
335 | container_of(work, struct bch_fs, read_only_work); | |
336 | ||
1ada1606 | 337 | down_write(&c->state_lock); |
1c6fdbd8 | 338 | bch2_fs_read_only(c); |
1ada1606 | 339 | up_write(&c->state_lock); |
1c6fdbd8 KO |
340 | } |
341 | ||
342 | static void bch2_fs_read_only_async(struct bch_fs *c) | |
343 | { | |
344 | queue_work(system_long_wq, &c->read_only_work); | |
345 | } | |
346 | ||
347 | bool bch2_fs_emergency_read_only(struct bch_fs *c) | |
348 | { | |
349 | bool ret = !test_and_set_bit(BCH_FS_EMERGENCY_RO, &c->flags); | |
350 | ||
1c6fdbd8 | 351 | bch2_journal_halt(&c->journal); |
9f115ce9 | 352 | bch2_fs_read_only_async(c); |
1c6fdbd8 KO |
353 | |
354 | wake_up(&bch_read_only_wait); | |
355 | return ret; | |
356 | } | |
357 | ||
134915f3 | 358 | static int bch2_fs_read_write_late(struct bch_fs *c) |
1c6fdbd8 | 359 | { |
134915f3 | 360 | int ret; |
1c6fdbd8 | 361 | |
134915f3 KO |
362 | ret = bch2_gc_thread_start(c); |
363 | if (ret) { | |
364 | bch_err(c, "error starting gc thread"); | |
365 | return ret; | |
366 | } | |
367 | ||
e6d11615 KO |
368 | ret = bch2_copygc_start(c); |
369 | if (ret) { | |
370 | bch_err(c, "error starting copygc thread"); | |
371 | return ret; | |
134915f3 KO |
372 | } |
373 | ||
374 | ret = bch2_rebalance_start(c); | |
375 | if (ret) { | |
376 | bch_err(c, "error starting rebalance thread"); | |
377 | return ret; | |
378 | } | |
379 | ||
97fd13ad KO |
380 | schedule_work(&c->ec_stripe_delete_work); |
381 | ||
134915f3 KO |
382 | return 0; |
383 | } | |
1c6fdbd8 | 384 | |
e731d466 | 385 | static int __bch2_fs_read_write(struct bch_fs *c, bool early) |
134915f3 KO |
386 | { |
387 | struct bch_dev *ca; | |
388 | unsigned i; | |
389 | int ret; | |
390 | ||
391 | if (test_bit(BCH_FS_RW, &c->flags)) | |
392 | return 0; | |
393 | ||
619f5bee KO |
394 | /* |
395 | * nochanges is used for fsck -n mode - we have to allow going rw | |
396 | * during recovery for that to work: | |
397 | */ | |
398 | if (c->opts.norecovery || | |
399 | (c->opts.nochanges && | |
400 | (!early || c->opts.read_only))) | |
401 | return -EROFS; | |
330581f1 | 402 | |
134915f3 KO |
403 | ret = bch2_fs_mark_dirty(c); |
404 | if (ret) | |
405 | goto err; | |
1c6fdbd8 | 406 | |
9f115ce9 KO |
407 | /* |
408 | * We need to write out a journal entry before we start doing btree | |
409 | * updates, to ensure that on unclean shutdown new journal blacklist | |
410 | * entries are created: | |
411 | */ | |
412 | bch2_journal_meta(&c->journal); | |
413 | ||
2340fd9d KO |
414 | clear_bit(BCH_FS_ALLOC_CLEAN, &c->flags); |
415 | ||
1c6fdbd8 KO |
416 | for_each_rw_member(ca, c, i) |
417 | bch2_dev_allocator_add(c, ca); | |
418 | bch2_recalc_capacity(c); | |
419 | ||
134915f3 KO |
420 | for_each_rw_member(ca, c, i) { |
421 | ret = bch2_dev_allocator_start(ca); | |
422 | if (ret) { | |
423 | bch_err(c, "error starting allocator threads"); | |
1c6fdbd8 KO |
424 | percpu_ref_put(&ca->io_ref); |
425 | goto err; | |
426 | } | |
134915f3 | 427 | } |
1c6fdbd8 | 428 | |
134915f3 | 429 | set_bit(BCH_FS_ALLOCATOR_RUNNING, &c->flags); |
1c6fdbd8 | 430 | |
59a74051 KO |
431 | for_each_rw_member(ca, c, i) |
432 | bch2_wake_allocator(ca); | |
433 | ||
b7a9bbfc KO |
434 | ret = bch2_journal_reclaim_start(&c->journal); |
435 | if (ret) { | |
436 | bch_err(c, "error starting journal reclaim: %i", ret); | |
437 | return ret; | |
438 | } | |
439 | ||
134915f3 KO |
440 | if (!early) { |
441 | ret = bch2_fs_read_write_late(c); | |
442 | if (ret) | |
443 | goto err; | |
444 | } | |
1c6fdbd8 | 445 | |
134915f3 KO |
446 | percpu_ref_reinit(&c->writes); |
447 | set_bit(BCH_FS_RW, &c->flags); | |
134915f3 | 448 | return 0; |
1c6fdbd8 KO |
449 | err: |
450 | __bch2_fs_read_only(c); | |
134915f3 KO |
451 | return ret; |
452 | } | |
453 | ||
454 | int bch2_fs_read_write(struct bch_fs *c) | |
455 | { | |
456 | return __bch2_fs_read_write(c, false); | |
457 | } | |
458 | ||
459 | int bch2_fs_read_write_early(struct bch_fs *c) | |
460 | { | |
461 | lockdep_assert_held(&c->state_lock); | |
462 | ||
134915f3 | 463 | return __bch2_fs_read_write(c, true); |
1c6fdbd8 KO |
464 | } |
465 | ||
466 | /* Filesystem startup/shutdown: */ | |
467 | ||
d5e4dcc2 | 468 | static void __bch2_fs_free(struct bch_fs *c) |
1c6fdbd8 KO |
469 | { |
470 | unsigned i; | |
1a21bf98 | 471 | int cpu; |
1c6fdbd8 KO |
472 | |
473 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
474 | bch2_time_stats_exit(&c->times[i]); | |
475 | ||
476 | bch2_fs_quota_exit(c); | |
477 | bch2_fs_fsio_exit(c); | |
cd575ddf | 478 | bch2_fs_ec_exit(c); |
1c6fdbd8 KO |
479 | bch2_fs_encryption_exit(c); |
480 | bch2_fs_io_exit(c); | |
c823c339 | 481 | bch2_fs_btree_interior_update_exit(c); |
36e9d698 | 482 | bch2_fs_btree_iter_exit(c); |
2ca88e5a | 483 | bch2_fs_btree_key_cache_exit(&c->btree_key_cache); |
1c6fdbd8 KO |
484 | bch2_fs_btree_cache_exit(c); |
485 | bch2_fs_journal_exit(&c->journal); | |
486 | bch2_io_clock_exit(&c->io_clock[WRITE]); | |
487 | bch2_io_clock_exit(&c->io_clock[READ]); | |
488 | bch2_fs_compress_exit(c); | |
f1d786a0 KO |
489 | bch2_journal_keys_free(&c->journal_keys); |
490 | bch2_journal_entries_free(&c->journal_entries); | |
9166b41d | 491 | percpu_free_rwsem(&c->mark_lock); |
5e82a9a1 | 492 | free_percpu(c->online_reserved); |
4d8100da | 493 | kfree(c->usage_scratch); |
f299d573 KO |
494 | for (i = 0; i < ARRAY_SIZE(c->usage); i++) |
495 | free_percpu(c->usage[i]); | |
5e82a9a1 | 496 | kfree(c->usage_base); |
1a21bf98 KO |
497 | |
498 | if (c->btree_iters_bufs) | |
499 | for_each_possible_cpu(cpu) | |
500 | kfree(per_cpu_ptr(c->btree_iters_bufs, cpu)->iter); | |
501 | ||
502 | free_percpu(c->btree_iters_bufs); | |
5663a415 | 503 | free_percpu(c->pcpu); |
35189e09 | 504 | mempool_exit(&c->large_bkey_pool); |
1c6fdbd8 KO |
505 | mempool_exit(&c->btree_bounce_pool); |
506 | bioset_exit(&c->btree_bio); | |
1c6fdbd8 KO |
507 | mempool_exit(&c->fill_iter); |
508 | percpu_ref_exit(&c->writes); | |
73e6ab95 KO |
509 | kfree(c->replicas.entries); |
510 | kfree(c->replicas_gc.entries); | |
1c6fdbd8 | 511 | kfree(rcu_dereference_protected(c->disk_groups, 1)); |
1dd7f9d9 | 512 | kfree(c->journal_seq_blacklist_table); |
b5e8a699 | 513 | kfree(c->unused_inode_hints); |
e6d11615 | 514 | free_heap(&c->copygc_heap); |
1c6fdbd8 KO |
515 | |
516 | if (c->copygc_wq) | |
517 | destroy_workqueue(c->copygc_wq); | |
518 | if (c->wq) | |
519 | destroy_workqueue(c->wq); | |
520 | ||
521 | free_pages((unsigned long) c->disk_sb.sb, | |
522 | c->disk_sb.page_order); | |
523 | kvpfree(c, sizeof(*c)); | |
524 | module_put(THIS_MODULE); | |
525 | } | |
526 | ||
527 | static void bch2_fs_release(struct kobject *kobj) | |
528 | { | |
529 | struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); | |
530 | ||
d5e4dcc2 | 531 | __bch2_fs_free(c); |
1c6fdbd8 KO |
532 | } |
533 | ||
d5e4dcc2 | 534 | void __bch2_fs_stop(struct bch_fs *c) |
1c6fdbd8 KO |
535 | { |
536 | struct bch_dev *ca; | |
537 | unsigned i; | |
538 | ||
af1c6871 KO |
539 | bch_verbose(c, "shutting down"); |
540 | ||
1dd7f9d9 KO |
541 | set_bit(BCH_FS_STOPPING, &c->flags); |
542 | ||
543 | cancel_work_sync(&c->journal_seq_blacklist_gc_work); | |
544 | ||
1ada1606 | 545 | down_write(&c->state_lock); |
883f1a7c | 546 | bch2_fs_read_only(c); |
1ada1606 | 547 | up_write(&c->state_lock); |
883f1a7c | 548 | |
1c6fdbd8 KO |
549 | for_each_member_device(ca, c, i) |
550 | if (ca->kobj.state_in_sysfs && | |
551 | ca->disk_sb.bdev) | |
552 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
553 | ||
554 | if (c->kobj.state_in_sysfs) | |
555 | kobject_del(&c->kobj); | |
556 | ||
557 | bch2_fs_debug_exit(c); | |
558 | bch2_fs_chardev_exit(c); | |
559 | ||
560 | kobject_put(&c->time_stats); | |
561 | kobject_put(&c->opts_dir); | |
562 | kobject_put(&c->internal); | |
563 | ||
1c6fdbd8 KO |
564 | /* btree prefetch might have kicked off reads in the background: */ |
565 | bch2_btree_flush_all_reads(c); | |
566 | ||
567 | for_each_member_device(ca, c, i) | |
568 | cancel_work_sync(&ca->io_error_work); | |
569 | ||
570 | cancel_work_sync(&c->btree_write_error_work); | |
1c6fdbd8 | 571 | cancel_work_sync(&c->read_only_work); |
d5e4dcc2 KO |
572 | } |
573 | ||
574 | void bch2_fs_free(struct bch_fs *c) | |
575 | { | |
576 | unsigned i; | |
577 | ||
578 | mutex_lock(&bch_fs_list_lock); | |
579 | list_del(&c->list); | |
580 | mutex_unlock(&bch_fs_list_lock); | |
581 | ||
582 | closure_sync(&c->cl); | |
583 | closure_debug_destroy(&c->cl); | |
584 | ||
585 | for (i = 0; i < c->sb.nr_devices; i++) { | |
586 | struct bch_dev *ca = rcu_dereference_protected(c->devs[i], true); | |
1c6fdbd8 | 587 | |
d5e4dcc2 KO |
588 | if (ca) { |
589 | bch2_free_super(&ca->disk_sb); | |
590 | bch2_dev_free(ca); | |
591 | } | |
592 | } | |
1c6fdbd8 | 593 | |
af1c6871 KO |
594 | bch_verbose(c, "shutdown complete"); |
595 | ||
1c6fdbd8 KO |
596 | kobject_put(&c->kobj); |
597 | } | |
598 | ||
d5e4dcc2 KO |
599 | void bch2_fs_stop(struct bch_fs *c) |
600 | { | |
601 | __bch2_fs_stop(c); | |
602 | bch2_fs_free(c); | |
603 | } | |
604 | ||
1c6fdbd8 KO |
605 | static const char *bch2_fs_online(struct bch_fs *c) |
606 | { | |
607 | struct bch_dev *ca; | |
608 | const char *err = NULL; | |
609 | unsigned i; | |
610 | int ret; | |
611 | ||
612 | lockdep_assert_held(&bch_fs_list_lock); | |
613 | ||
614 | if (!list_empty(&c->list)) | |
615 | return NULL; | |
616 | ||
617 | if (__bch2_uuid_to_fs(c->sb.uuid)) | |
618 | return "filesystem UUID already open"; | |
619 | ||
620 | ret = bch2_fs_chardev_init(c); | |
621 | if (ret) | |
622 | return "error creating character device"; | |
623 | ||
624 | bch2_fs_debug_init(c); | |
625 | ||
626 | if (kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) || | |
627 | kobject_add(&c->internal, &c->kobj, "internal") || | |
628 | kobject_add(&c->opts_dir, &c->kobj, "options") || | |
629 | kobject_add(&c->time_stats, &c->kobj, "time_stats") || | |
630 | bch2_opts_create_sysfs_files(&c->opts_dir)) | |
631 | return "error creating sysfs objects"; | |
632 | ||
1ada1606 | 633 | down_write(&c->state_lock); |
1c6fdbd8 KO |
634 | |
635 | err = "error creating sysfs objects"; | |
636 | __for_each_member_device(ca, c, i, NULL) | |
637 | if (bch2_dev_sysfs_online(c, ca)) | |
638 | goto err; | |
639 | ||
640 | list_add(&c->list, &bch_fs_list); | |
641 | err = NULL; | |
642 | err: | |
1ada1606 | 643 | up_write(&c->state_lock); |
1c6fdbd8 KO |
644 | return err; |
645 | } | |
646 | ||
647 | static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts) | |
648 | { | |
649 | struct bch_sb_field_members *mi; | |
650 | struct bch_fs *c; | |
ecf37a4a | 651 | unsigned i, iter_size; |
1c6fdbd8 KO |
652 | const char *err; |
653 | ||
654 | pr_verbose_init(opts, ""); | |
655 | ||
656 | c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO); | |
657 | if (!c) | |
658 | goto out; | |
659 | ||
660 | __module_get(THIS_MODULE); | |
661 | ||
505b7a4c KO |
662 | closure_init(&c->cl, NULL); |
663 | ||
664 | c->kobj.kset = bcachefs_kset; | |
665 | kobject_init(&c->kobj, &bch2_fs_ktype); | |
666 | kobject_init(&c->internal, &bch2_fs_internal_ktype); | |
667 | kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype); | |
668 | kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype); | |
669 | ||
1c6fdbd8 KO |
670 | c->minor = -1; |
671 | c->disk_sb.fs_sb = true; | |
672 | ||
1ada1606 | 673 | init_rwsem(&c->state_lock); |
1c6fdbd8 KO |
674 | mutex_init(&c->sb_lock); |
675 | mutex_init(&c->replicas_gc_lock); | |
676 | mutex_init(&c->btree_root_lock); | |
677 | INIT_WORK(&c->read_only_work, bch2_fs_read_only_work); | |
678 | ||
679 | init_rwsem(&c->gc_lock); | |
680 | ||
681 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
682 | bch2_time_stats_init(&c->times[i]); | |
683 | ||
e6d11615 | 684 | bch2_fs_copygc_init(c); |
2ca88e5a | 685 | bch2_fs_btree_key_cache_init_early(&c->btree_key_cache); |
b092dadd KO |
686 | bch2_fs_allocator_background_init(c); |
687 | bch2_fs_allocator_foreground_init(c); | |
1c6fdbd8 KO |
688 | bch2_fs_rebalance_init(c); |
689 | bch2_fs_quota_init(c); | |
690 | ||
691 | INIT_LIST_HEAD(&c->list); | |
692 | ||
4d8100da KO |
693 | mutex_init(&c->usage_scratch_lock); |
694 | ||
1c6fdbd8 KO |
695 | mutex_init(&c->bio_bounce_pages_lock); |
696 | ||
697 | bio_list_init(&c->btree_write_error_list); | |
698 | spin_lock_init(&c->btree_write_error_lock); | |
699 | INIT_WORK(&c->btree_write_error_work, bch2_btree_write_error_work); | |
700 | ||
1dd7f9d9 KO |
701 | INIT_WORK(&c->journal_seq_blacklist_gc_work, |
702 | bch2_blacklist_entries_gc); | |
703 | ||
f1d786a0 | 704 | INIT_LIST_HEAD(&c->journal_entries); |
5b593ee1 | 705 | INIT_LIST_HEAD(&c->journal_iters); |
f1d786a0 | 706 | |
1c6fdbd8 KO |
707 | INIT_LIST_HEAD(&c->fsck_errors); |
708 | mutex_init(&c->fsck_error_lock); | |
709 | ||
703e2a43 KO |
710 | INIT_LIST_HEAD(&c->ec_stripe_head_list); |
711 | mutex_init(&c->ec_stripe_head_lock); | |
712 | ||
713 | INIT_LIST_HEAD(&c->ec_stripe_new_list); | |
714 | mutex_init(&c->ec_stripe_new_lock); | |
715 | ||
cd575ddf KO |
716 | spin_lock_init(&c->ec_stripes_heap_lock); |
717 | ||
1c6fdbd8 KO |
718 | seqcount_init(&c->gc_pos_lock); |
719 | ||
5e82a9a1 KO |
720 | seqcount_init(&c->usage_lock); |
721 | ||
1c6fdbd8 KO |
722 | c->copy_gc_enabled = 1; |
723 | c->rebalance.enabled = 1; | |
724 | c->promote_whole_extents = true; | |
725 | ||
726 | c->journal.write_time = &c->times[BCH_TIME_journal_write]; | |
727 | c->journal.delay_time = &c->times[BCH_TIME_journal_delay]; | |
49a67206 | 728 | c->journal.blocked_time = &c->times[BCH_TIME_blocked_journal]; |
1c6fdbd8 KO |
729 | c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq]; |
730 | ||
731 | bch2_fs_btree_cache_init_early(&c->btree_cache); | |
732 | ||
fca1223c KO |
733 | mutex_init(&c->sectors_available_lock); |
734 | ||
73e6ab95 KO |
735 | if (percpu_init_rwsem(&c->mark_lock)) |
736 | goto err; | |
737 | ||
1c6fdbd8 KO |
738 | mutex_lock(&c->sb_lock); |
739 | ||
740 | if (bch2_sb_to_fs(c, sb)) { | |
741 | mutex_unlock(&c->sb_lock); | |
742 | goto err; | |
743 | } | |
744 | ||
745 | mutex_unlock(&c->sb_lock); | |
746 | ||
747 | scnprintf(c->name, sizeof(c->name), "%pU", &c->sb.user_uuid); | |
748 | ||
749 | c->opts = bch2_opts_default; | |
750 | bch2_opts_apply(&c->opts, bch2_opts_from_sb(sb)); | |
751 | bch2_opts_apply(&c->opts, opts); | |
752 | ||
753 | c->block_bits = ilog2(c->opts.block_size); | |
754 | c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c); | |
755 | ||
1c6fdbd8 KO |
756 | if (bch2_fs_init_fault("fs_alloc")) |
757 | goto err; | |
758 | ||
ae2f17d5 | 759 | iter_size = sizeof(struct sort_iter) + |
1c6fdbd8 | 760 | (btree_blocks(c) + 1) * 2 * |
ae2f17d5 | 761 | sizeof(struct sort_iter_set); |
1c6fdbd8 | 762 | |
b5e8a699 KO |
763 | c->inode_shard_bits = ilog2(roundup_pow_of_two(num_possible_cpus())); |
764 | ||
1c6fdbd8 | 765 | if (!(c->wq = alloc_workqueue("bcachefs", |
2f33ece9 KO |
766 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) || |
767 | !(c->copygc_wq = alloc_workqueue("bcachefs_copygc", | |
768 | WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) || | |
134915f3 KO |
769 | percpu_ref_init(&c->writes, bch2_writes_disabled, |
770 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
1c6fdbd8 KO |
771 | mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) || |
772 | bioset_init(&c->btree_bio, 1, | |
773 | max(offsetof(struct btree_read_bio, bio), | |
774 | offsetof(struct btree_write_bio, wbio.bio)), | |
775 | BIOSET_NEED_BVECS) || | |
5663a415 | 776 | !(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) || |
5e82a9a1 | 777 | !(c->online_reserved = alloc_percpu(u64)) || |
1a21bf98 | 778 | !(c->btree_iters_bufs = alloc_percpu(struct btree_iter_buf)) || |
1c6fdbd8 KO |
779 | mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1, |
780 | btree_bytes(c)) || | |
35189e09 | 781 | mempool_init_kmalloc_pool(&c->large_bkey_pool, 1, 2048) || |
b5e8a699 KO |
782 | !(c->unused_inode_hints = kcalloc(1U << c->inode_shard_bits, |
783 | sizeof(u64), GFP_KERNEL)) || | |
1c6fdbd8 KO |
784 | bch2_io_clock_init(&c->io_clock[READ]) || |
785 | bch2_io_clock_init(&c->io_clock[WRITE]) || | |
786 | bch2_fs_journal_init(&c->journal) || | |
2c5af169 | 787 | bch2_fs_replicas_init(c) || |
1c6fdbd8 | 788 | bch2_fs_btree_cache_init(c) || |
2ca88e5a | 789 | bch2_fs_btree_key_cache_init(&c->btree_key_cache) || |
36e9d698 | 790 | bch2_fs_btree_iter_init(c) || |
c823c339 | 791 | bch2_fs_btree_interior_update_init(c) || |
1c6fdbd8 KO |
792 | bch2_fs_io_init(c) || |
793 | bch2_fs_encryption_init(c) || | |
794 | bch2_fs_compress_init(c) || | |
cd575ddf | 795 | bch2_fs_ec_init(c) || |
1c6fdbd8 KO |
796 | bch2_fs_fsio_init(c)) |
797 | goto err; | |
798 | ||
799 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
800 | for (i = 0; i < c->sb.nr_devices; i++) | |
801 | if (bch2_dev_exists(c->disk_sb.sb, mi, i) && | |
802 | bch2_dev_alloc(c, i)) | |
803 | goto err; | |
804 | ||
4b8f89af KO |
805 | bch2_journal_entry_res_resize(&c->journal, |
806 | &c->btree_root_journal_res, | |
807 | BTREE_ID_NR * (JSET_KEYS_U64s + BKEY_BTREE_PTR_U64s_MAX)); | |
808 | bch2_dev_usage_journal_reserve(c); | |
809 | bch2_journal_entry_res_resize(&c->journal, | |
810 | &c->clock_journal_res, | |
811 | (sizeof(struct jset_entry_clock) / sizeof(u64)) * 2); | |
812 | ||
1c6fdbd8 KO |
813 | mutex_lock(&bch_fs_list_lock); |
814 | err = bch2_fs_online(c); | |
815 | mutex_unlock(&bch_fs_list_lock); | |
816 | if (err) { | |
817 | bch_err(c, "bch2_fs_online() error: %s", err); | |
818 | goto err; | |
819 | } | |
820 | out: | |
821 | pr_verbose_init(opts, "ret %i", c ? 0 : -ENOMEM); | |
822 | return c; | |
823 | err: | |
824 | bch2_fs_free(c); | |
825 | c = NULL; | |
826 | goto out; | |
827 | } | |
828 | ||
619f5bee KO |
829 | noinline_for_stack |
830 | static void print_mount_opts(struct bch_fs *c) | |
831 | { | |
832 | enum bch_opt_id i; | |
833 | char buf[512]; | |
834 | struct printbuf p = PBUF(buf); | |
835 | bool first = true; | |
836 | ||
837 | strcpy(buf, "(null)"); | |
838 | ||
839 | if (c->opts.read_only) { | |
840 | pr_buf(&p, "ro"); | |
841 | first = false; | |
842 | } | |
843 | ||
844 | for (i = 0; i < bch2_opts_nr; i++) { | |
845 | const struct bch_option *opt = &bch2_opt_table[i]; | |
846 | u64 v = bch2_opt_get_by_id(&c->opts, i); | |
847 | ||
848 | if (!(opt->mode & OPT_MOUNT)) | |
849 | continue; | |
850 | ||
851 | if (v == bch2_opt_get_by_id(&bch2_opts_default, i)) | |
852 | continue; | |
853 | ||
854 | if (!first) | |
855 | pr_buf(&p, ","); | |
856 | first = false; | |
857 | bch2_opt_to_text(&p, c, opt, v, OPT_SHOW_MOUNT_STYLE); | |
858 | } | |
859 | ||
860 | bch_info(c, "mounted with opts: %s", buf); | |
861 | } | |
862 | ||
863 | int bch2_fs_start(struct bch_fs *c) | |
1c6fdbd8 KO |
864 | { |
865 | const char *err = "cannot allocate memory"; | |
866 | struct bch_sb_field_members *mi; | |
867 | struct bch_dev *ca; | |
a420eea6 | 868 | time64_t now = ktime_get_real_seconds(); |
1c6fdbd8 KO |
869 | unsigned i; |
870 | int ret = -EINVAL; | |
871 | ||
1ada1606 | 872 | down_write(&c->state_lock); |
1c6fdbd8 | 873 | |
134915f3 | 874 | BUG_ON(test_bit(BCH_FS_STARTED, &c->flags)); |
1c6fdbd8 KO |
875 | |
876 | mutex_lock(&c->sb_lock); | |
877 | ||
878 | for_each_online_member(ca, c, i) | |
879 | bch2_sb_from_fs(c, ca); | |
880 | ||
881 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
882 | for_each_online_member(ca, c, i) | |
883 | mi->members[ca->dev_idx].last_mount = cpu_to_le64(now); | |
884 | ||
885 | mutex_unlock(&c->sb_lock); | |
886 | ||
887 | for_each_rw_member(ca, c, i) | |
888 | bch2_dev_allocator_add(c, ca); | |
889 | bch2_recalc_capacity(c); | |
890 | ||
891 | ret = BCH_SB_INITIALIZED(c->disk_sb.sb) | |
892 | ? bch2_fs_recovery(c) | |
893 | : bch2_fs_initialize(c); | |
894 | if (ret) | |
895 | goto err; | |
cd575ddf KO |
896 | |
897 | ret = bch2_opts_check_may_set(c); | |
898 | if (ret) | |
899 | goto err; | |
1c6fdbd8 KO |
900 | |
901 | err = "dynamic fault"; | |
619f5bee | 902 | ret = -EINVAL; |
1c6fdbd8 KO |
903 | if (bch2_fs_init_fault("fs_start")) |
904 | goto err; | |
905 | ||
a9310ab0 KO |
906 | set_bit(BCH_FS_STARTED, &c->flags); |
907 | ||
9f20ed15 KO |
908 | /* |
909 | * Allocator threads don't start filling copygc reserve until after we | |
910 | * set BCH_FS_STARTED - wake them now: | |
2ee47eec KO |
911 | * |
912 | * XXX ugly hack: | |
913 | * Need to set ca->allocator_state here instead of relying on the | |
914 | * allocator threads to do it to avoid racing with the copygc threads | |
915 | * checking it and thinking they have no alloc reserve: | |
9f20ed15 | 916 | */ |
2ee47eec KO |
917 | for_each_online_member(ca, c, i) { |
918 | ca->allocator_state = ALLOCATOR_running; | |
9f20ed15 | 919 | bch2_wake_allocator(ca); |
2ee47eec | 920 | } |
9f20ed15 | 921 | |
619f5bee | 922 | if (c->opts.read_only || c->opts.nochanges) { |
1c6fdbd8 KO |
923 | bch2_fs_read_only(c); |
924 | } else { | |
619f5bee KO |
925 | err = "error going read write"; |
926 | ret = !test_bit(BCH_FS_RW, &c->flags) | |
927 | ? bch2_fs_read_write(c) | |
928 | : bch2_fs_read_write_late(c); | |
929 | if (ret) | |
1c6fdbd8 KO |
930 | goto err; |
931 | } | |
932 | ||
619f5bee KO |
933 | print_mount_opts(c); |
934 | ret = 0; | |
1c6fdbd8 | 935 | out: |
1ada1606 | 936 | up_write(&c->state_lock); |
619f5bee | 937 | return ret; |
1c6fdbd8 KO |
938 | err: |
939 | switch (ret) { | |
940 | case BCH_FSCK_ERRORS_NOT_FIXED: | |
941 | bch_err(c, "filesystem contains errors: please report this to the developers"); | |
942 | pr_cont("mount with -o fix_errors to repair\n"); | |
943 | err = "fsck error"; | |
944 | break; | |
945 | case BCH_FSCK_REPAIR_UNIMPLEMENTED: | |
946 | bch_err(c, "filesystem contains errors: please report this to the developers"); | |
947 | pr_cont("repair unimplemented: inform the developers so that it can be added\n"); | |
948 | err = "fsck error"; | |
949 | break; | |
950 | case BCH_FSCK_REPAIR_IMPOSSIBLE: | |
951 | bch_err(c, "filesystem contains errors, but repair impossible"); | |
952 | err = "fsck error"; | |
953 | break; | |
954 | case BCH_FSCK_UNKNOWN_VERSION: | |
955 | err = "unknown metadata version";; | |
956 | break; | |
957 | case -ENOMEM: | |
958 | err = "cannot allocate memory"; | |
959 | break; | |
960 | case -EIO: | |
961 | err = "IO error"; | |
962 | break; | |
963 | } | |
964 | ||
9516950c KO |
965 | if (ret >= 0) |
966 | ret = -EIO; | |
1c6fdbd8 KO |
967 | goto out; |
968 | } | |
969 | ||
970 | static const char *bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c) | |
971 | { | |
972 | struct bch_sb_field_members *sb_mi; | |
973 | ||
974 | sb_mi = bch2_sb_get_members(sb); | |
975 | if (!sb_mi) | |
976 | return "Invalid superblock: member info area missing"; | |
977 | ||
978 | if (le16_to_cpu(sb->block_size) != c->opts.block_size) | |
979 | return "mismatched block size"; | |
980 | ||
981 | if (le16_to_cpu(sb_mi->members[sb->dev_idx].bucket_size) < | |
982 | BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb)) | |
983 | return "new cache bucket size is too small"; | |
984 | ||
985 | return NULL; | |
986 | } | |
987 | ||
988 | static const char *bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb) | |
989 | { | |
990 | struct bch_sb *newest = | |
991 | le64_to_cpu(fs->seq) > le64_to_cpu(sb->seq) ? fs : sb; | |
992 | struct bch_sb_field_members *mi = bch2_sb_get_members(newest); | |
993 | ||
994 | if (!uuid_equal(&fs->uuid, &sb->uuid)) | |
995 | return "device not a member of filesystem"; | |
996 | ||
997 | if (!bch2_dev_exists(newest, mi, sb->dev_idx)) | |
998 | return "device has been removed"; | |
999 | ||
1000 | if (fs->block_size != sb->block_size) | |
1001 | return "mismatched block size"; | |
1002 | ||
1003 | return NULL; | |
1004 | } | |
1005 | ||
1006 | /* Device startup/shutdown: */ | |
1007 | ||
1008 | static void bch2_dev_release(struct kobject *kobj) | |
1009 | { | |
1010 | struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); | |
1011 | ||
1012 | kfree(ca); | |
1013 | } | |
1014 | ||
1015 | static void bch2_dev_free(struct bch_dev *ca) | |
1016 | { | |
59a74051 KO |
1017 | bch2_dev_allocator_stop(ca); |
1018 | ||
1c6fdbd8 KO |
1019 | cancel_work_sync(&ca->io_error_work); |
1020 | ||
1021 | if (ca->kobj.state_in_sysfs && | |
1022 | ca->disk_sb.bdev) | |
1023 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1024 | ||
1025 | if (ca->kobj.state_in_sysfs) | |
1026 | kobject_del(&ca->kobj); | |
1027 | ||
1028 | bch2_free_super(&ca->disk_sb); | |
1029 | bch2_dev_journal_exit(ca); | |
1030 | ||
1031 | free_percpu(ca->io_done); | |
1032 | bioset_exit(&ca->replica_set); | |
1033 | bch2_dev_buckets_free(ca); | |
d1170ce5 | 1034 | free_page((unsigned long) ca->sb_read_scratch); |
1c6fdbd8 KO |
1035 | |
1036 | bch2_time_stats_exit(&ca->io_latency[WRITE]); | |
1037 | bch2_time_stats_exit(&ca->io_latency[READ]); | |
1038 | ||
1039 | percpu_ref_exit(&ca->io_ref); | |
1040 | percpu_ref_exit(&ca->ref); | |
1041 | kobject_put(&ca->kobj); | |
1042 | } | |
1043 | ||
1044 | static void __bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca) | |
1045 | { | |
1046 | ||
1047 | lockdep_assert_held(&c->state_lock); | |
1048 | ||
1049 | if (percpu_ref_is_zero(&ca->io_ref)) | |
1050 | return; | |
1051 | ||
1052 | __bch2_dev_read_only(c, ca); | |
1053 | ||
1054 | reinit_completion(&ca->io_ref_completion); | |
1055 | percpu_ref_kill(&ca->io_ref); | |
1056 | wait_for_completion(&ca->io_ref_completion); | |
1057 | ||
1058 | if (ca->kobj.state_in_sysfs) { | |
1059 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1060 | sysfs_remove_link(&ca->kobj, "block"); | |
1061 | } | |
1062 | ||
1063 | bch2_free_super(&ca->disk_sb); | |
1064 | bch2_dev_journal_exit(ca); | |
1065 | } | |
1066 | ||
1067 | static void bch2_dev_ref_complete(struct percpu_ref *ref) | |
1068 | { | |
1069 | struct bch_dev *ca = container_of(ref, struct bch_dev, ref); | |
1070 | ||
1071 | complete(&ca->ref_completion); | |
1072 | } | |
1073 | ||
1074 | static void bch2_dev_io_ref_complete(struct percpu_ref *ref) | |
1075 | { | |
1076 | struct bch_dev *ca = container_of(ref, struct bch_dev, io_ref); | |
1077 | ||
1078 | complete(&ca->io_ref_completion); | |
1079 | } | |
1080 | ||
1081 | static int bch2_dev_sysfs_online(struct bch_fs *c, struct bch_dev *ca) | |
1082 | { | |
1083 | int ret; | |
1084 | ||
1085 | if (!c->kobj.state_in_sysfs) | |
1086 | return 0; | |
1087 | ||
1088 | if (!ca->kobj.state_in_sysfs) { | |
1089 | ret = kobject_add(&ca->kobj, &c->kobj, | |
1090 | "dev-%u", ca->dev_idx); | |
1091 | if (ret) | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | if (ca->disk_sb.bdev) { | |
1096 | struct kobject *block = bdev_kobj(ca->disk_sb.bdev); | |
1097 | ||
1098 | ret = sysfs_create_link(block, &ca->kobj, "bcachefs"); | |
1099 | if (ret) | |
1100 | return ret; | |
1101 | ||
1102 | ret = sysfs_create_link(&ca->kobj, block, "block"); | |
1103 | if (ret) | |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c, | |
1111 | struct bch_member *member) | |
1112 | { | |
1113 | struct bch_dev *ca; | |
1114 | ||
1115 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); | |
1116 | if (!ca) | |
1117 | return NULL; | |
1118 | ||
1119 | kobject_init(&ca->kobj, &bch2_dev_ktype); | |
1120 | init_completion(&ca->ref_completion); | |
1121 | init_completion(&ca->io_ref_completion); | |
1122 | ||
1123 | init_rwsem(&ca->bucket_lock); | |
1124 | ||
1c6fdbd8 KO |
1125 | INIT_WORK(&ca->io_error_work, bch2_io_error_work); |
1126 | ||
1127 | bch2_time_stats_init(&ca->io_latency[READ]); | |
1128 | bch2_time_stats_init(&ca->io_latency[WRITE]); | |
1129 | ||
1130 | ca->mi = bch2_mi_to_cpu(member); | |
1131 | ca->uuid = member->uuid; | |
1132 | ||
1133 | if (opt_defined(c->opts, discard)) | |
1134 | ca->mi.discard = opt_get(c->opts, discard); | |
1135 | ||
1136 | if (percpu_ref_init(&ca->ref, bch2_dev_ref_complete, | |
1137 | 0, GFP_KERNEL) || | |
1138 | percpu_ref_init(&ca->io_ref, bch2_dev_io_ref_complete, | |
1139 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d1170ce5 | 1140 | !(ca->sb_read_scratch = (void *) __get_free_page(GFP_KERNEL)) || |
1c6fdbd8 KO |
1141 | bch2_dev_buckets_alloc(c, ca) || |
1142 | bioset_init(&ca->replica_set, 4, | |
1143 | offsetof(struct bch_write_bio, bio), 0) || | |
1144 | !(ca->io_done = alloc_percpu(*ca->io_done))) | |
1145 | goto err; | |
1146 | ||
1147 | return ca; | |
1148 | err: | |
1149 | bch2_dev_free(ca); | |
1150 | return NULL; | |
1151 | } | |
1152 | ||
1153 | static void bch2_dev_attach(struct bch_fs *c, struct bch_dev *ca, | |
1154 | unsigned dev_idx) | |
1155 | { | |
1156 | ca->dev_idx = dev_idx; | |
1157 | __set_bit(ca->dev_idx, ca->self.d); | |
1158 | scnprintf(ca->name, sizeof(ca->name), "dev-%u", dev_idx); | |
1159 | ||
1160 | ca->fs = c; | |
1161 | rcu_assign_pointer(c->devs[ca->dev_idx], ca); | |
1162 | ||
1163 | if (bch2_dev_sysfs_online(c, ca)) | |
1164 | pr_warn("error creating sysfs objects"); | |
1165 | } | |
1166 | ||
1167 | static int bch2_dev_alloc(struct bch_fs *c, unsigned dev_idx) | |
1168 | { | |
1169 | struct bch_member *member = | |
1170 | bch2_sb_get_members(c->disk_sb.sb)->members + dev_idx; | |
1171 | struct bch_dev *ca = NULL; | |
1172 | int ret = 0; | |
1173 | ||
1174 | pr_verbose_init(c->opts, ""); | |
1175 | ||
1176 | if (bch2_fs_init_fault("dev_alloc")) | |
1177 | goto err; | |
1178 | ||
1179 | ca = __bch2_dev_alloc(c, member); | |
1180 | if (!ca) | |
1181 | goto err; | |
1182 | ||
220d2062 KO |
1183 | ca->fs = c; |
1184 | ||
59a74051 KO |
1185 | if (ca->mi.state == BCH_MEMBER_STATE_RW && |
1186 | bch2_dev_allocator_start(ca)) { | |
1187 | bch2_dev_free(ca); | |
1188 | goto err; | |
1189 | } | |
1190 | ||
1c6fdbd8 KO |
1191 | bch2_dev_attach(c, ca, dev_idx); |
1192 | out: | |
1193 | pr_verbose_init(c->opts, "ret %i", ret); | |
1194 | return ret; | |
1195 | err: | |
1196 | if (ca) | |
1197 | bch2_dev_free(ca); | |
1198 | ret = -ENOMEM; | |
1199 | goto out; | |
1200 | } | |
1201 | ||
1202 | static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb) | |
1203 | { | |
1204 | unsigned ret; | |
1205 | ||
1206 | if (bch2_dev_is_online(ca)) { | |
1207 | bch_err(ca, "already have device online in slot %u", | |
1208 | sb->sb->dev_idx); | |
1209 | return -EINVAL; | |
1210 | } | |
1211 | ||
1212 | if (get_capacity(sb->bdev->bd_disk) < | |
1213 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1214 | bch_err(ca, "cannot online: device too small"); | |
1215 | return -EINVAL; | |
1216 | } | |
1217 | ||
1218 | BUG_ON(!percpu_ref_is_zero(&ca->io_ref)); | |
1219 | ||
1220 | if (get_capacity(sb->bdev->bd_disk) < | |
1221 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1222 | bch_err(ca, "device too small"); | |
1223 | return -EINVAL; | |
1224 | } | |
1225 | ||
1226 | ret = bch2_dev_journal_init(ca, sb->sb); | |
1227 | if (ret) | |
1228 | return ret; | |
1229 | ||
1230 | /* Commit: */ | |
1231 | ca->disk_sb = *sb; | |
1232 | memset(sb, 0, sizeof(*sb)); | |
1233 | ||
1c6fdbd8 KO |
1234 | percpu_ref_reinit(&ca->io_ref); |
1235 | ||
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb) | |
1240 | { | |
1241 | struct bch_dev *ca; | |
1242 | int ret; | |
1243 | ||
1244 | lockdep_assert_held(&c->state_lock); | |
1245 | ||
1246 | if (le64_to_cpu(sb->sb->seq) > | |
1247 | le64_to_cpu(c->disk_sb.sb->seq)) | |
1248 | bch2_sb_to_fs(c, sb->sb); | |
1249 | ||
1250 | BUG_ON(sb->sb->dev_idx >= c->sb.nr_devices || | |
1251 | !c->devs[sb->sb->dev_idx]); | |
1252 | ||
1253 | ca = bch_dev_locked(c, sb->sb->dev_idx); | |
1254 | ||
1255 | ret = __bch2_dev_attach_bdev(ca, sb); | |
1256 | if (ret) | |
1257 | return ret; | |
1258 | ||
1259 | bch2_dev_sysfs_online(c, ca); | |
1260 | ||
1261 | if (c->sb.nr_devices == 1) | |
1262 | snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev); | |
1263 | snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev); | |
1264 | ||
1265 | rebalance_wakeup(c); | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | /* Device management: */ | |
1270 | ||
1271 | /* | |
1272 | * Note: this function is also used by the error paths - when a particular | |
1273 | * device sees an error, we call it to determine whether we can just set the | |
1274 | * device RO, or - if this function returns false - we'll set the whole | |
1275 | * filesystem RO: | |
1276 | * | |
1277 | * XXX: maybe we should be more explicit about whether we're changing state | |
1278 | * because we got an error or what have you? | |
1279 | */ | |
1280 | bool bch2_dev_state_allowed(struct bch_fs *c, struct bch_dev *ca, | |
1281 | enum bch_member_state new_state, int flags) | |
1282 | { | |
1283 | struct bch_devs_mask new_online_devs; | |
1c6fdbd8 KO |
1284 | struct bch_dev *ca2; |
1285 | int i, nr_rw = 0, required; | |
1286 | ||
1287 | lockdep_assert_held(&c->state_lock); | |
1288 | ||
1289 | switch (new_state) { | |
1290 | case BCH_MEMBER_STATE_RW: | |
1291 | return true; | |
1292 | case BCH_MEMBER_STATE_RO: | |
1293 | if (ca->mi.state != BCH_MEMBER_STATE_RW) | |
1294 | return true; | |
1295 | ||
1296 | /* do we have enough devices to write to? */ | |
1297 | for_each_member_device(ca2, c, i) | |
1298 | if (ca2 != ca) | |
1299 | nr_rw += ca2->mi.state == BCH_MEMBER_STATE_RW; | |
1300 | ||
1301 | required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED) | |
1302 | ? c->opts.metadata_replicas | |
1303 | : c->opts.metadata_replicas_required, | |
1304 | !(flags & BCH_FORCE_IF_DATA_DEGRADED) | |
1305 | ? c->opts.data_replicas | |
1306 | : c->opts.data_replicas_required); | |
1307 | ||
1308 | return nr_rw >= required; | |
1309 | case BCH_MEMBER_STATE_FAILED: | |
1310 | case BCH_MEMBER_STATE_SPARE: | |
1311 | if (ca->mi.state != BCH_MEMBER_STATE_RW && | |
1312 | ca->mi.state != BCH_MEMBER_STATE_RO) | |
1313 | return true; | |
1314 | ||
1315 | /* do we have enough devices to read from? */ | |
1316 | new_online_devs = bch2_online_devs(c); | |
1317 | __clear_bit(ca->dev_idx, new_online_devs.d); | |
1318 | ||
fcb3431b | 1319 | return bch2_have_enough_devs(c, new_online_devs, flags, false); |
1c6fdbd8 KO |
1320 | default: |
1321 | BUG(); | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | static bool bch2_fs_may_start(struct bch_fs *c) | |
1326 | { | |
1c6fdbd8 KO |
1327 | struct bch_sb_field_members *mi; |
1328 | struct bch_dev *ca; | |
fcb3431b KO |
1329 | unsigned i, flags = 0; |
1330 | ||
1331 | if (c->opts.very_degraded) | |
1332 | flags |= BCH_FORCE_IF_DEGRADED|BCH_FORCE_IF_LOST; | |
1c6fdbd8 | 1333 | |
fcb3431b KO |
1334 | if (c->opts.degraded) |
1335 | flags |= BCH_FORCE_IF_DEGRADED; | |
1336 | ||
1337 | if (!c->opts.degraded && | |
1338 | !c->opts.very_degraded) { | |
1c6fdbd8 KO |
1339 | mutex_lock(&c->sb_lock); |
1340 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1341 | ||
1342 | for (i = 0; i < c->disk_sb.sb->nr_devices; i++) { | |
1343 | if (!bch2_dev_exists(c->disk_sb.sb, mi, i)) | |
1344 | continue; | |
1345 | ||
1346 | ca = bch_dev_locked(c, i); | |
1347 | ||
1348 | if (!bch2_dev_is_online(ca) && | |
1349 | (ca->mi.state == BCH_MEMBER_STATE_RW || | |
1350 | ca->mi.state == BCH_MEMBER_STATE_RO)) { | |
1351 | mutex_unlock(&c->sb_lock); | |
1352 | return false; | |
1353 | } | |
1354 | } | |
1355 | mutex_unlock(&c->sb_lock); | |
1356 | } | |
1357 | ||
fcb3431b | 1358 | return bch2_have_enough_devs(c, bch2_online_devs(c), flags, true); |
1c6fdbd8 KO |
1359 | } |
1360 | ||
1361 | static void __bch2_dev_read_only(struct bch_fs *c, struct bch_dev *ca) | |
1362 | { | |
74ed7e56 KO |
1363 | /* |
1364 | * Device going read only means the copygc reserve get smaller, so we | |
1365 | * don't want that happening while copygc is in progress: | |
1366 | */ | |
1367 | bch2_copygc_stop(c); | |
1368 | ||
1c6fdbd8 KO |
1369 | /* |
1370 | * The allocator thread itself allocates btree nodes, so stop it first: | |
1371 | */ | |
1372 | bch2_dev_allocator_stop(ca); | |
1373 | bch2_dev_allocator_remove(c, ca); | |
1374 | bch2_dev_journal_stop(&c->journal, ca); | |
74ed7e56 KO |
1375 | |
1376 | bch2_copygc_start(c); | |
1c6fdbd8 KO |
1377 | } |
1378 | ||
1379 | static const char *__bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca) | |
1380 | { | |
1381 | lockdep_assert_held(&c->state_lock); | |
1382 | ||
1383 | BUG_ON(ca->mi.state != BCH_MEMBER_STATE_RW); | |
1384 | ||
1385 | bch2_dev_allocator_add(c, ca); | |
1386 | bch2_recalc_capacity(c); | |
1387 | ||
1388 | if (bch2_dev_allocator_start(ca)) | |
1389 | return "error starting allocator thread"; | |
1390 | ||
1c6fdbd8 KO |
1391 | return NULL; |
1392 | } | |
1393 | ||
1394 | int __bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1395 | enum bch_member_state new_state, int flags) | |
1396 | { | |
1397 | struct bch_sb_field_members *mi; | |
1398 | int ret = 0; | |
1399 | ||
1400 | if (ca->mi.state == new_state) | |
1401 | return 0; | |
1402 | ||
1403 | if (!bch2_dev_state_allowed(c, ca, new_state, flags)) | |
1404 | return -EINVAL; | |
1405 | ||
1406 | if (new_state != BCH_MEMBER_STATE_RW) | |
1407 | __bch2_dev_read_only(c, ca); | |
1408 | ||
1409 | bch_notice(ca, "%s", bch2_dev_state[new_state]); | |
1410 | ||
1411 | mutex_lock(&c->sb_lock); | |
1412 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1413 | SET_BCH_MEMBER_STATE(&mi->members[ca->dev_idx], new_state); | |
1414 | bch2_write_super(c); | |
1415 | mutex_unlock(&c->sb_lock); | |
1416 | ||
1417 | if (new_state == BCH_MEMBER_STATE_RW && | |
1418 | __bch2_dev_read_write(c, ca)) | |
1419 | ret = -ENOMEM; | |
1420 | ||
1421 | rebalance_wakeup(c); | |
1422 | ||
1423 | return ret; | |
1424 | } | |
1425 | ||
1426 | int bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1427 | enum bch_member_state new_state, int flags) | |
1428 | { | |
1429 | int ret; | |
1430 | ||
1ada1606 | 1431 | down_write(&c->state_lock); |
1c6fdbd8 | 1432 | ret = __bch2_dev_set_state(c, ca, new_state, flags); |
1ada1606 | 1433 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1434 | |
1435 | return ret; | |
1436 | } | |
1437 | ||
1438 | /* Device add/removal: */ | |
1439 | ||
5d20ba48 KO |
1440 | int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca) |
1441 | { | |
1442 | struct btree_trans trans; | |
1443 | size_t i; | |
1444 | int ret; | |
1445 | ||
1446 | bch2_trans_init(&trans, c, 0, 0); | |
1447 | ||
1448 | for (i = 0; i < ca->mi.nbuckets; i++) { | |
1449 | ret = bch2_btree_key_cache_flush(&trans, | |
1450 | BTREE_ID_ALLOC, POS(ca->dev_idx, i)); | |
1451 | if (ret) | |
1452 | break; | |
1453 | } | |
1454 | bch2_trans_exit(&trans); | |
1455 | ||
1456 | if (ret) | |
1457 | return ret; | |
1458 | ||
1459 | return bch2_btree_delete_range(c, BTREE_ID_ALLOC, | |
1460 | POS(ca->dev_idx, 0), | |
1461 | POS(ca->dev_idx + 1, 0), | |
1462 | NULL); | |
1463 | } | |
1464 | ||
1c6fdbd8 KO |
1465 | int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags) |
1466 | { | |
1467 | struct bch_sb_field_members *mi; | |
1468 | unsigned dev_idx = ca->dev_idx, data; | |
1469 | int ret = -EINVAL; | |
1470 | ||
1ada1606 | 1471 | down_write(&c->state_lock); |
1c6fdbd8 | 1472 | |
31ba2cd3 KO |
1473 | /* |
1474 | * We consume a reference to ca->ref, regardless of whether we succeed | |
1475 | * or fail: | |
1476 | */ | |
1477 | percpu_ref_put(&ca->ref); | |
1c6fdbd8 KO |
1478 | |
1479 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) { | |
1480 | bch_err(ca, "Cannot remove without losing data"); | |
1481 | goto err; | |
1482 | } | |
1483 | ||
1484 | __bch2_dev_read_only(c, ca); | |
1485 | ||
1c6fdbd8 KO |
1486 | ret = bch2_dev_data_drop(c, ca->dev_idx, flags); |
1487 | if (ret) { | |
1488 | bch_err(ca, "Remove failed: error %i dropping data", ret); | |
1489 | goto err; | |
1490 | } | |
1491 | ||
1492 | ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx); | |
1493 | if (ret) { | |
1494 | bch_err(ca, "Remove failed: error %i flushing journal", ret); | |
1495 | goto err; | |
1496 | } | |
1497 | ||
5d20ba48 | 1498 | ret = bch2_dev_remove_alloc(c, ca); |
1c6fdbd8 KO |
1499 | if (ret) { |
1500 | bch_err(ca, "Remove failed, error deleting alloc info"); | |
1501 | goto err; | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * must flush all existing journal entries, they might have | |
1506 | * (overwritten) keys that point to the device we're removing: | |
1507 | */ | |
1508 | bch2_journal_flush_all_pins(&c->journal); | |
31ba2cd3 KO |
1509 | /* |
1510 | * hack to ensure bch2_replicas_gc2() clears out entries to this device | |
1511 | */ | |
1512 | bch2_journal_meta(&c->journal); | |
1c6fdbd8 KO |
1513 | ret = bch2_journal_error(&c->journal); |
1514 | if (ret) { | |
1515 | bch_err(ca, "Remove failed, journal error"); | |
1516 | goto err; | |
1517 | } | |
1518 | ||
31ba2cd3 KO |
1519 | ret = bch2_replicas_gc2(c); |
1520 | if (ret) { | |
1521 | bch_err(ca, "Remove failed: error %i from replicas gc", ret); | |
1522 | goto err; | |
1523 | } | |
1524 | ||
1525 | data = bch2_dev_has_data(c, ca); | |
1526 | if (data) { | |
1527 | char data_has_str[100]; | |
1528 | ||
1529 | bch2_flags_to_text(&PBUF(data_has_str), | |
1530 | bch2_data_types, data); | |
1531 | bch_err(ca, "Remove failed, still has data (%s)", data_has_str); | |
1532 | ret = -EBUSY; | |
1533 | goto err; | |
1534 | } | |
1535 | ||
1c6fdbd8 KO |
1536 | __bch2_dev_offline(c, ca); |
1537 | ||
1538 | mutex_lock(&c->sb_lock); | |
1539 | rcu_assign_pointer(c->devs[ca->dev_idx], NULL); | |
1540 | mutex_unlock(&c->sb_lock); | |
1541 | ||
1542 | percpu_ref_kill(&ca->ref); | |
1543 | wait_for_completion(&ca->ref_completion); | |
1544 | ||
1545 | bch2_dev_free(ca); | |
1546 | ||
1547 | /* | |
1548 | * Free this device's slot in the bch_member array - all pointers to | |
1549 | * this device must be gone: | |
1550 | */ | |
1551 | mutex_lock(&c->sb_lock); | |
1552 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1553 | memset(&mi->members[dev_idx].uuid, 0, sizeof(mi->members[dev_idx].uuid)); | |
1554 | ||
1555 | bch2_write_super(c); | |
1556 | ||
1557 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1558 | up_write(&c->state_lock); |
180fb49d KO |
1559 | |
1560 | bch2_dev_usage_journal_reserve(c); | |
1c6fdbd8 KO |
1561 | return 0; |
1562 | err: | |
d3bb629d KO |
1563 | if (ca->mi.state == BCH_MEMBER_STATE_RW && |
1564 | !percpu_ref_is_zero(&ca->io_ref)) | |
1c6fdbd8 | 1565 | __bch2_dev_read_write(c, ca); |
1ada1606 | 1566 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1567 | return ret; |
1568 | } | |
1569 | ||
1570 | /* Add new device to running filesystem: */ | |
1571 | int bch2_dev_add(struct bch_fs *c, const char *path) | |
1572 | { | |
1573 | struct bch_opts opts = bch2_opts_empty(); | |
1574 | struct bch_sb_handle sb; | |
1575 | const char *err; | |
1576 | struct bch_dev *ca = NULL; | |
1577 | struct bch_sb_field_members *mi; | |
1578 | struct bch_member dev_mi; | |
1579 | unsigned dev_idx, nr_devices, u64s; | |
1580 | int ret; | |
1581 | ||
1582 | ret = bch2_read_super(path, &opts, &sb); | |
1583 | if (ret) | |
1584 | return ret; | |
1585 | ||
1586 | err = bch2_sb_validate(&sb); | |
1587 | if (err) | |
1588 | return -EINVAL; | |
1589 | ||
1590 | dev_mi = bch2_sb_get_members(sb.sb)->members[sb.sb->dev_idx]; | |
1591 | ||
1592 | err = bch2_dev_may_add(sb.sb, c); | |
1593 | if (err) | |
1594 | return -EINVAL; | |
1595 | ||
1596 | ca = __bch2_dev_alloc(c, &dev_mi); | |
1597 | if (!ca) { | |
1598 | bch2_free_super(&sb); | |
1599 | return -ENOMEM; | |
1600 | } | |
1601 | ||
1602 | ret = __bch2_dev_attach_bdev(ca, &sb); | |
1603 | if (ret) { | |
1604 | bch2_dev_free(ca); | |
1605 | return ret; | |
1606 | } | |
1607 | ||
6eac2c2e KO |
1608 | /* |
1609 | * We want to allocate journal on the new device before adding the new | |
1610 | * device to the filesystem because allocating after we attach requires | |
1611 | * spinning up the allocator thread, and the allocator thread requires | |
1612 | * doing btree writes, which if the existing devices are RO isn't going | |
1613 | * to work | |
1614 | * | |
1615 | * So we have to mark where the superblocks are, but marking allocated | |
1616 | * data normally updates the filesystem usage too, so we have to mark, | |
1617 | * allocate the journal, reset all the marks, then remark after we | |
1618 | * attach... | |
1619 | */ | |
bfcf840d | 1620 | bch2_mark_dev_superblock(NULL, ca, 0); |
6eac2c2e | 1621 | |
1c6fdbd8 KO |
1622 | err = "journal alloc failed"; |
1623 | ret = bch2_dev_journal_alloc(ca); | |
1624 | if (ret) | |
1625 | goto err; | |
1626 | ||
1ada1606 | 1627 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1628 | mutex_lock(&c->sb_lock); |
1629 | ||
1630 | err = "insufficient space in new superblock"; | |
1631 | ret = bch2_sb_from_fs(c, ca); | |
1632 | if (ret) | |
1633 | goto err_unlock; | |
1634 | ||
1635 | mi = bch2_sb_get_members(ca->disk_sb.sb); | |
1636 | ||
1637 | if (!bch2_sb_resize_members(&ca->disk_sb, | |
1638 | le32_to_cpu(mi->field.u64s) + | |
1639 | sizeof(dev_mi) / sizeof(u64))) { | |
1640 | ret = -ENOSPC; | |
1641 | goto err_unlock; | |
1642 | } | |
1643 | ||
1644 | if (dynamic_fault("bcachefs:add:no_slot")) | |
1645 | goto no_slot; | |
1646 | ||
1647 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1648 | for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++) | |
1649 | if (!bch2_dev_exists(c->disk_sb.sb, mi, dev_idx)) | |
1650 | goto have_slot; | |
1651 | no_slot: | |
1652 | err = "no slots available in superblock"; | |
1653 | ret = -ENOSPC; | |
1654 | goto err_unlock; | |
1655 | ||
1656 | have_slot: | |
1657 | nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices); | |
1658 | u64s = (sizeof(struct bch_sb_field_members) + | |
1659 | sizeof(struct bch_member) * nr_devices) / sizeof(u64); | |
1660 | ||
1661 | err = "no space in superblock for member info"; | |
1662 | ret = -ENOSPC; | |
1663 | ||
1664 | mi = bch2_sb_resize_members(&c->disk_sb, u64s); | |
1665 | if (!mi) | |
1666 | goto err_unlock; | |
1667 | ||
1668 | /* success: */ | |
1669 | ||
1670 | mi->members[dev_idx] = dev_mi; | |
a420eea6 | 1671 | mi->members[dev_idx].last_mount = cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1672 | c->disk_sb.sb->nr_devices = nr_devices; |
1673 | ||
1674 | ca->disk_sb.sb->dev_idx = dev_idx; | |
1675 | bch2_dev_attach(c, ca, dev_idx); | |
1676 | ||
1677 | bch2_write_super(c); | |
1678 | mutex_unlock(&c->sb_lock); | |
1679 | ||
180fb49d KO |
1680 | bch2_dev_usage_journal_reserve(c); |
1681 | ||
bfcf840d KO |
1682 | err = "error marking superblock"; |
1683 | ret = bch2_trans_mark_dev_sb(c, NULL, ca); | |
8d6b6222 | 1684 | if (ret) |
bfcf840d | 1685 | goto err_late; |
8d6b6222 | 1686 | |
1c6fdbd8 KO |
1687 | if (ca->mi.state == BCH_MEMBER_STATE_RW) { |
1688 | err = __bch2_dev_read_write(c, ca); | |
1689 | if (err) | |
1690 | goto err_late; | |
1691 | } | |
1692 | ||
1ada1606 | 1693 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1694 | return 0; |
1695 | ||
1696 | err_unlock: | |
1697 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1698 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1699 | err: |
1700 | if (ca) | |
1701 | bch2_dev_free(ca); | |
1702 | bch2_free_super(&sb); | |
1703 | bch_err(c, "Unable to add device: %s", err); | |
1704 | return ret; | |
1705 | err_late: | |
bfcf840d | 1706 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1707 | bch_err(c, "Error going rw after adding device: %s", err); |
1708 | return -EINVAL; | |
1709 | } | |
1710 | ||
1711 | /* Hot add existing device to running filesystem: */ | |
1712 | int bch2_dev_online(struct bch_fs *c, const char *path) | |
1713 | { | |
1714 | struct bch_opts opts = bch2_opts_empty(); | |
1715 | struct bch_sb_handle sb = { NULL }; | |
1716 | struct bch_sb_field_members *mi; | |
1717 | struct bch_dev *ca; | |
1718 | unsigned dev_idx; | |
1719 | const char *err; | |
1720 | int ret; | |
1721 | ||
1ada1606 | 1722 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1723 | |
1724 | ret = bch2_read_super(path, &opts, &sb); | |
1725 | if (ret) { | |
1ada1606 | 1726 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1727 | return ret; |
1728 | } | |
1729 | ||
1730 | dev_idx = sb.sb->dev_idx; | |
1731 | ||
1732 | err = bch2_dev_in_fs(c->disk_sb.sb, sb.sb); | |
1733 | if (err) | |
1734 | goto err; | |
1735 | ||
1736 | if (bch2_dev_attach_bdev(c, &sb)) { | |
1737 | err = "bch2_dev_attach_bdev() error"; | |
1738 | goto err; | |
1739 | } | |
1740 | ||
1741 | ca = bch_dev_locked(c, dev_idx); | |
bfcf840d KO |
1742 | |
1743 | if (bch2_trans_mark_dev_sb(c, NULL, ca)) { | |
1744 | err = "bch2_trans_mark_dev_sb() error"; | |
1745 | goto err; | |
1746 | } | |
1747 | ||
1c6fdbd8 KO |
1748 | if (ca->mi.state == BCH_MEMBER_STATE_RW) { |
1749 | err = __bch2_dev_read_write(c, ca); | |
1750 | if (err) | |
1751 | goto err; | |
1752 | } | |
1753 | ||
1754 | mutex_lock(&c->sb_lock); | |
1755 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1756 | ||
1757 | mi->members[ca->dev_idx].last_mount = | |
a420eea6 | 1758 | cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1759 | |
1760 | bch2_write_super(c); | |
1761 | mutex_unlock(&c->sb_lock); | |
1762 | ||
1ada1606 | 1763 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1764 | return 0; |
1765 | err: | |
1ada1606 | 1766 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1767 | bch2_free_super(&sb); |
1768 | bch_err(c, "error bringing %s online: %s", path, err); | |
1769 | return -EINVAL; | |
1770 | } | |
1771 | ||
1772 | int bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca, int flags) | |
1773 | { | |
1ada1606 | 1774 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1775 | |
1776 | if (!bch2_dev_is_online(ca)) { | |
1777 | bch_err(ca, "Already offline"); | |
1ada1606 | 1778 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1779 | return 0; |
1780 | } | |
1781 | ||
1782 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) { | |
1783 | bch_err(ca, "Cannot offline required disk"); | |
1ada1606 | 1784 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1785 | return -EINVAL; |
1786 | } | |
1787 | ||
1788 | __bch2_dev_offline(c, ca); | |
1789 | ||
1ada1606 | 1790 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1791 | return 0; |
1792 | } | |
1793 | ||
1794 | int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets) | |
1795 | { | |
1796 | struct bch_member *mi; | |
1797 | int ret = 0; | |
1798 | ||
1ada1606 | 1799 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1800 | |
1801 | if (nbuckets < ca->mi.nbuckets) { | |
1802 | bch_err(ca, "Cannot shrink yet"); | |
1803 | ret = -EINVAL; | |
1804 | goto err; | |
1805 | } | |
1806 | ||
1807 | if (bch2_dev_is_online(ca) && | |
1808 | get_capacity(ca->disk_sb.bdev->bd_disk) < | |
1809 | ca->mi.bucket_size * nbuckets) { | |
1810 | bch_err(ca, "New size larger than device"); | |
1811 | ret = -EINVAL; | |
1812 | goto err; | |
1813 | } | |
1814 | ||
1815 | ret = bch2_dev_buckets_resize(c, ca, nbuckets); | |
1816 | if (ret) { | |
1817 | bch_err(ca, "Resize error: %i", ret); | |
1818 | goto err; | |
1819 | } | |
1820 | ||
1821 | mutex_lock(&c->sb_lock); | |
1822 | mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx]; | |
1823 | mi->nbuckets = cpu_to_le64(nbuckets); | |
1824 | ||
1825 | bch2_write_super(c); | |
1826 | mutex_unlock(&c->sb_lock); | |
1827 | ||
1828 | bch2_recalc_capacity(c); | |
1829 | err: | |
1ada1606 | 1830 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1831 | return ret; |
1832 | } | |
1833 | ||
1834 | /* return with ref on ca->ref: */ | |
1835 | struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *path) | |
1836 | { | |
1c6fdbd8 KO |
1837 | struct bch_dev *ca; |
1838 | dev_t dev; | |
1839 | unsigned i; | |
1840 | int ret; | |
1841 | ||
1842 | ret = lookup_bdev(path, &dev); | |
1843 | if (ret) | |
1844 | return ERR_PTR(ret); | |
1845 | ||
1846 | for_each_member_device(ca, c, i) | |
1847 | if (ca->disk_sb.bdev->bd_dev == dev) | |
1848 | goto found; | |
1849 | ||
1850 | ca = ERR_PTR(-ENOENT); | |
1851 | found: | |
1852 | return ca; | |
1853 | } | |
1854 | ||
1855 | /* Filesystem open: */ | |
1856 | ||
1857 | struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices, | |
1858 | struct bch_opts opts) | |
1859 | { | |
1860 | struct bch_sb_handle *sb = NULL; | |
1861 | struct bch_fs *c = NULL; | |
625104ea | 1862 | struct bch_sb_field_members *mi; |
1c6fdbd8 KO |
1863 | unsigned i, best_sb = 0; |
1864 | const char *err; | |
1865 | int ret = -ENOMEM; | |
1866 | ||
1867 | pr_verbose_init(opts, ""); | |
1868 | ||
1869 | if (!nr_devices) { | |
1870 | c = ERR_PTR(-EINVAL); | |
1871 | goto out2; | |
1872 | } | |
1873 | ||
1874 | if (!try_module_get(THIS_MODULE)) { | |
1875 | c = ERR_PTR(-ENODEV); | |
1876 | goto out2; | |
1877 | } | |
1878 | ||
1879 | sb = kcalloc(nr_devices, sizeof(*sb), GFP_KERNEL); | |
1880 | if (!sb) | |
1881 | goto err; | |
1882 | ||
1883 | for (i = 0; i < nr_devices; i++) { | |
1884 | ret = bch2_read_super(devices[i], &opts, &sb[i]); | |
1885 | if (ret) | |
1886 | goto err; | |
1887 | ||
1888 | err = bch2_sb_validate(&sb[i]); | |
1889 | if (err) | |
1890 | goto err_print; | |
1891 | } | |
1892 | ||
1893 | for (i = 1; i < nr_devices; i++) | |
1894 | if (le64_to_cpu(sb[i].sb->seq) > | |
1895 | le64_to_cpu(sb[best_sb].sb->seq)) | |
1896 | best_sb = i; | |
1897 | ||
625104ea KO |
1898 | mi = bch2_sb_get_members(sb[best_sb].sb); |
1899 | ||
1900 | i = 0; | |
1901 | while (i < nr_devices) { | |
1902 | if (i != best_sb && | |
1903 | !bch2_dev_exists(sb[best_sb].sb, mi, sb[i].sb->dev_idx)) { | |
1904 | pr_info("%pg has been removed, skipping", sb[i].bdev); | |
1905 | bch2_free_super(&sb[i]); | |
1906 | array_remove_item(sb, nr_devices, i); | |
1907 | continue; | |
1908 | } | |
1909 | ||
1c6fdbd8 KO |
1910 | err = bch2_dev_in_fs(sb[best_sb].sb, sb[i].sb); |
1911 | if (err) | |
1912 | goto err_print; | |
625104ea | 1913 | i++; |
1c6fdbd8 KO |
1914 | } |
1915 | ||
1916 | ret = -ENOMEM; | |
1917 | c = bch2_fs_alloc(sb[best_sb].sb, opts); | |
1918 | if (!c) | |
1919 | goto err; | |
1920 | ||
1921 | err = "bch2_dev_online() error"; | |
1ada1606 | 1922 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1923 | for (i = 0; i < nr_devices; i++) |
1924 | if (bch2_dev_attach_bdev(c, &sb[i])) { | |
1ada1606 | 1925 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1926 | goto err_print; |
1927 | } | |
1ada1606 | 1928 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1929 | |
1930 | err = "insufficient devices"; | |
1931 | if (!bch2_fs_may_start(c)) | |
1932 | goto err_print; | |
1933 | ||
1934 | if (!c->opts.nostart) { | |
619f5bee KO |
1935 | ret = bch2_fs_start(c); |
1936 | if (ret) | |
1937 | goto err; | |
1c6fdbd8 KO |
1938 | } |
1939 | out: | |
1940 | kfree(sb); | |
1941 | module_put(THIS_MODULE); | |
1942 | out2: | |
1943 | pr_verbose_init(opts, "ret %i", PTR_ERR_OR_ZERO(c)); | |
1944 | return c; | |
1945 | err_print: | |
1946 | pr_err("bch_fs_open err opening %s: %s", | |
1947 | devices[0], err); | |
1948 | ret = -EINVAL; | |
1949 | err: | |
1950 | if (c) | |
1951 | bch2_fs_stop(c); | |
1952 | for (i = 0; i < nr_devices; i++) | |
1953 | bch2_free_super(&sb[i]); | |
1954 | c = ERR_PTR(ret); | |
1955 | goto out; | |
1956 | } | |
1957 | ||
1958 | static const char *__bch2_fs_open_incremental(struct bch_sb_handle *sb, | |
1959 | struct bch_opts opts) | |
1960 | { | |
1961 | const char *err; | |
1962 | struct bch_fs *c; | |
1963 | bool allocated_fs = false; | |
619f5bee | 1964 | int ret; |
1c6fdbd8 KO |
1965 | |
1966 | err = bch2_sb_validate(sb); | |
1967 | if (err) | |
1968 | return err; | |
1969 | ||
1970 | mutex_lock(&bch_fs_list_lock); | |
1971 | c = __bch2_uuid_to_fs(sb->sb->uuid); | |
1972 | if (c) { | |
1973 | closure_get(&c->cl); | |
1974 | ||
1975 | err = bch2_dev_in_fs(c->disk_sb.sb, sb->sb); | |
1976 | if (err) | |
1977 | goto err; | |
1978 | } else { | |
1979 | c = bch2_fs_alloc(sb->sb, opts); | |
1980 | err = "cannot allocate memory"; | |
1981 | if (!c) | |
1982 | goto err; | |
1983 | ||
1984 | allocated_fs = true; | |
1985 | } | |
1986 | ||
1987 | err = "bch2_dev_online() error"; | |
1988 | ||
1989 | mutex_lock(&c->sb_lock); | |
1990 | if (bch2_dev_attach_bdev(c, sb)) { | |
1991 | mutex_unlock(&c->sb_lock); | |
1992 | goto err; | |
1993 | } | |
1994 | mutex_unlock(&c->sb_lock); | |
1995 | ||
1996 | if (!c->opts.nostart && bch2_fs_may_start(c)) { | |
619f5bee KO |
1997 | err = "error starting filesystem"; |
1998 | ret = bch2_fs_start(c); | |
1999 | if (ret) | |
1c6fdbd8 KO |
2000 | goto err; |
2001 | } | |
2002 | ||
2003 | closure_put(&c->cl); | |
2004 | mutex_unlock(&bch_fs_list_lock); | |
2005 | ||
2006 | return NULL; | |
2007 | err: | |
2008 | mutex_unlock(&bch_fs_list_lock); | |
2009 | ||
2010 | if (allocated_fs) | |
2011 | bch2_fs_stop(c); | |
2012 | else if (c) | |
2013 | closure_put(&c->cl); | |
2014 | ||
2015 | return err; | |
2016 | } | |
2017 | ||
2018 | const char *bch2_fs_open_incremental(const char *path) | |
2019 | { | |
2020 | struct bch_sb_handle sb; | |
2021 | struct bch_opts opts = bch2_opts_empty(); | |
2022 | const char *err; | |
2023 | ||
2024 | if (bch2_read_super(path, &opts, &sb)) | |
2025 | return "error reading superblock"; | |
2026 | ||
2027 | err = __bch2_fs_open_incremental(&sb, opts); | |
2028 | bch2_free_super(&sb); | |
2029 | ||
2030 | return err; | |
2031 | } | |
2032 | ||
2033 | /* Global interfaces/init */ | |
2034 | ||
2035 | static void bcachefs_exit(void) | |
2036 | { | |
2037 | bch2_debug_exit(); | |
2038 | bch2_vfs_exit(); | |
2039 | bch2_chardev_exit(); | |
14ba3706 | 2040 | bch2_btree_key_cache_exit(); |
1c6fdbd8 KO |
2041 | if (bcachefs_kset) |
2042 | kset_unregister(bcachefs_kset); | |
2043 | } | |
2044 | ||
2045 | static int __init bcachefs_init(void) | |
2046 | { | |
2047 | bch2_bkey_pack_test(); | |
1c6fdbd8 KO |
2048 | |
2049 | if (!(bcachefs_kset = kset_create_and_add("bcachefs", NULL, fs_kobj)) || | |
14ba3706 | 2050 | bch2_btree_key_cache_init() || |
1c6fdbd8 KO |
2051 | bch2_chardev_init() || |
2052 | bch2_vfs_init() || | |
2053 | bch2_debug_init()) | |
2054 | goto err; | |
2055 | ||
2056 | return 0; | |
2057 | err: | |
2058 | bcachefs_exit(); | |
2059 | return -ENOMEM; | |
2060 | } | |
2061 | ||
2062 | #define BCH_DEBUG_PARAM(name, description) \ | |
2063 | bool bch2_##name; \ | |
2064 | module_param_named(name, bch2_##name, bool, 0644); \ | |
2065 | MODULE_PARM_DESC(name, description); | |
2066 | BCH_DEBUG_PARAMS() | |
2067 | #undef BCH_DEBUG_PARAM | |
2068 | ||
26609b61 | 2069 | unsigned bch2_metadata_version = bcachefs_metadata_version_current; |
1c6fdbd8 KO |
2070 | module_param_named(version, bch2_metadata_version, uint, 0400); |
2071 | ||
2072 | module_exit(bcachefs_exit); | |
2073 | module_init(bcachefs_init); |