Commit | Line | Data |
---|---|---|
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> | |
52 | #include <linux/kthread.h> | |
53 | #include <linux/module.h> | |
54 | #include <linux/percpu.h> | |
55 | #include <linux/random.h> | |
56 | #include <linux/sysfs.h> | |
57 | #include <crypto/hash.h> | |
58 | ||
59 | MODULE_LICENSE("GPL"); | |
60 | MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>"); | |
61 | ||
62 | #define KTYPE(type) \ | |
63 | static const struct attribute_group type ## _group = { \ | |
64 | .attrs = type ## _files \ | |
65 | }; \ | |
66 | \ | |
67 | static const struct attribute_group *type ## _groups[] = { \ | |
68 | &type ## _group, \ | |
69 | NULL \ | |
70 | }; \ | |
71 | \ | |
72 | static const struct kobj_type type ## _ktype = { \ | |
73 | .release = type ## _release, \ | |
74 | .sysfs_ops = &type ## _sysfs_ops, \ | |
75 | .default_groups = type ## _groups \ | |
76 | } | |
77 | ||
78 | static void bch2_fs_release(struct kobject *); | |
79 | static void bch2_dev_release(struct kobject *); | |
80 | ||
81 | static void bch2_fs_internal_release(struct kobject *k) | |
82 | { | |
83 | } | |
84 | ||
85 | static void bch2_fs_opts_dir_release(struct kobject *k) | |
86 | { | |
87 | } | |
88 | ||
89 | static void bch2_fs_time_stats_release(struct kobject *k) | |
90 | { | |
91 | } | |
92 | ||
93 | KTYPE(bch2_fs); | |
94 | KTYPE(bch2_fs_internal); | |
95 | KTYPE(bch2_fs_opts_dir); | |
96 | KTYPE(bch2_fs_time_stats); | |
97 | KTYPE(bch2_dev); | |
98 | ||
99 | static struct kset *bcachefs_kset; | |
100 | static LIST_HEAD(bch_fs_list); | |
101 | static DEFINE_MUTEX(bch_fs_list_lock); | |
102 | ||
103 | static DECLARE_WAIT_QUEUE_HEAD(bch_read_only_wait); | |
104 | ||
105 | static void bch2_dev_free(struct bch_dev *); | |
106 | static int bch2_dev_alloc(struct bch_fs *, unsigned); | |
107 | static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *); | |
108 | static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *); | |
109 | ||
110 | struct bch_fs *bch2_dev_to_fs(dev_t dev) | |
111 | { | |
112 | struct bch_fs *c; | |
113 | struct bch_dev *ca; | |
114 | unsigned i; | |
115 | ||
116 | mutex_lock(&bch_fs_list_lock); | |
117 | rcu_read_lock(); | |
118 | ||
119 | list_for_each_entry(c, &bch_fs_list, list) | |
120 | for_each_member_device_rcu(ca, c, i, NULL) | |
121 | if (ca->disk_sb.bdev->bd_dev == dev) { | |
122 | closure_get(&c->cl); | |
123 | goto found; | |
124 | } | |
125 | c = NULL; | |
126 | found: | |
127 | rcu_read_unlock(); | |
128 | mutex_unlock(&bch_fs_list_lock); | |
129 | ||
130 | return c; | |
131 | } | |
132 | ||
133 | static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid) | |
134 | { | |
135 | struct bch_fs *c; | |
136 | ||
137 | lockdep_assert_held(&bch_fs_list_lock); | |
138 | ||
139 | list_for_each_entry(c, &bch_fs_list, list) | |
140 | if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid))) | |
141 | return c; | |
142 | ||
143 | return NULL; | |
144 | } | |
145 | ||
146 | struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid) | |
147 | { | |
148 | struct bch_fs *c; | |
149 | ||
150 | mutex_lock(&bch_fs_list_lock); | |
151 | c = __bch2_uuid_to_fs(uuid); | |
152 | if (c) | |
153 | closure_get(&c->cl); | |
154 | mutex_unlock(&bch_fs_list_lock); | |
155 | ||
156 | return c; | |
157 | } | |
158 | ||
159 | /* Filesystem RO/RW: */ | |
160 | ||
161 | /* | |
162 | * For startup/shutdown of RW stuff, the dependencies are: | |
163 | * | |
164 | * - foreground writes depend on copygc and rebalance (to free up space) | |
165 | * | |
166 | * - copygc and rebalance depend on mark and sweep gc (they actually probably | |
167 | * don't because they either reserve ahead of time or don't block if | |
168 | * allocations fail, but allocations can require mark and sweep gc to run | |
169 | * because of generation number wraparound) | |
170 | * | |
171 | * - all of the above depends on the allocator threads | |
172 | * | |
173 | * - allocator depends on the journal (when it rewrites prios and gens) | |
174 | */ | |
175 | ||
176 | static void __bch2_fs_read_only(struct bch_fs *c) | |
177 | { | |
178 | struct bch_dev *ca; | |
d5f70c1f | 179 | unsigned i, clean_passes = 0; |
1c6fdbd8 KO |
180 | |
181 | bch2_rebalance_stop(c); | |
e6d11615 | 182 | bch2_copygc_stop(c); |
1c6fdbd8 KO |
183 | bch2_gc_thread_stop(c); |
184 | ||
28998019 KO |
185 | bch2_io_timer_del(&c->io_clock[READ], &c->bucket_clock[READ].rescale); |
186 | bch2_io_timer_del(&c->io_clock[WRITE], &c->bucket_clock[WRITE].rescale); | |
187 | ||
1c6fdbd8 KO |
188 | /* |
189 | * Flush journal before stopping allocators, because flushing journal | |
190 | * blacklist entries involves allocating new btree nodes: | |
191 | */ | |
192 | bch2_journal_flush_all_pins(&c->journal); | |
193 | ||
2340fd9d KO |
194 | /* |
195 | * If the allocator threads didn't all start up, the btree updates to | |
196 | * write out alloc info aren't going to work: | |
197 | */ | |
b935a8a6 | 198 | if (!test_bit(BCH_FS_ALLOCATOR_RUNNING, &c->flags)) |
2340fd9d | 199 | goto nowrote_alloc; |
b935a8a6 | 200 | |
039fc4c5 | 201 | bch_verbose(c, "flushing journal and stopping allocators"); |
460651ee | 202 | |
039fc4c5 KO |
203 | bch2_journal_flush_all_pins(&c->journal); |
204 | set_bit(BCH_FS_ALLOCATOR_STOPPING, &c->flags); | |
61c8d7c8 | 205 | |
039fc4c5 KO |
206 | do { |
207 | clean_passes++; | |
430735cd | 208 | |
039fc4c5 KO |
209 | if (bch2_journal_flush_all_pins(&c->journal)) |
210 | clean_passes = 0; | |
430735cd KO |
211 | |
212 | /* | |
039fc4c5 KO |
213 | * In flight interior btree updates will generate more journal |
214 | * updates and btree updates (alloc btree): | |
430735cd | 215 | */ |
039fc4c5 KO |
216 | if (bch2_btree_interior_updates_nr_pending(c)) { |
217 | closure_wait_event(&c->btree_interior_update_wait, | |
218 | !bch2_btree_interior_updates_nr_pending(c)); | |
219 | clean_passes = 0; | |
220 | } | |
00b8ccf7 | 221 | flush_work(&c->btree_interior_update_work); |
d5f70c1f | 222 | |
039fc4c5 KO |
223 | if (bch2_journal_flush_all_pins(&c->journal)) |
224 | clean_passes = 0; | |
d5f70c1f | 225 | } while (clean_passes < 2); |
039fc4c5 | 226 | bch_verbose(c, "flushing journal and stopping allocators complete"); |
2340fd9d KO |
227 | |
228 | set_bit(BCH_FS_ALLOC_CLEAN, &c->flags); | |
229 | nowrote_alloc: | |
00b8ccf7 KO |
230 | closure_wait_event(&c->btree_interior_update_wait, |
231 | !bch2_btree_interior_updates_nr_pending(c)); | |
232 | flush_work(&c->btree_interior_update_work); | |
233 | ||
1c6fdbd8 KO |
234 | for_each_member_device(ca, c, i) |
235 | bch2_dev_allocator_stop(ca); | |
236 | ||
b935a8a6 | 237 | clear_bit(BCH_FS_ALLOCATOR_RUNNING, &c->flags); |
039fc4c5 | 238 | clear_bit(BCH_FS_ALLOCATOR_STOPPING, &c->flags); |
b935a8a6 | 239 | |
1c6fdbd8 KO |
240 | bch2_fs_journal_stop(&c->journal); |
241 | ||
242 | /* | |
243 | * the journal kicks off btree writes via reclaim - wait for in flight | |
244 | * writes after stopping journal: | |
245 | */ | |
246 | if (test_bit(BCH_FS_EMERGENCY_RO, &c->flags)) | |
247 | bch2_btree_flush_all_writes(c); | |
248 | else | |
249 | bch2_btree_verify_flushed(c); | |
250 | ||
251 | /* | |
252 | * After stopping journal: | |
253 | */ | |
254 | for_each_member_device(ca, c, i) | |
255 | bch2_dev_allocator_remove(c, ca); | |
256 | } | |
257 | ||
258 | static void bch2_writes_disabled(struct percpu_ref *writes) | |
259 | { | |
260 | struct bch_fs *c = container_of(writes, struct bch_fs, writes); | |
261 | ||
262 | set_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
263 | wake_up(&bch_read_only_wait); | |
264 | } | |
265 | ||
266 | void bch2_fs_read_only(struct bch_fs *c) | |
267 | { | |
134915f3 KO |
268 | if (!test_bit(BCH_FS_RW, &c->flags)) { |
269 | cancel_delayed_work_sync(&c->journal.reclaim_work); | |
1c6fdbd8 | 270 | return; |
134915f3 | 271 | } |
1c6fdbd8 KO |
272 | |
273 | BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
274 | ||
275 | /* | |
276 | * Block new foreground-end write operations from starting - any new | |
277 | * writes will return -EROFS: | |
278 | * | |
279 | * (This is really blocking new _allocations_, writes to previously | |
280 | * allocated space can still happen until stopping the allocator in | |
281 | * bch2_dev_allocator_stop()). | |
282 | */ | |
283 | percpu_ref_kill(&c->writes); | |
284 | ||
f516c872 | 285 | cancel_work_sync(&c->ec_stripe_delete_work); |
1c6fdbd8 KO |
286 | cancel_delayed_work(&c->pd_controllers_update); |
287 | ||
288 | /* | |
289 | * If we're not doing an emergency shutdown, we want to wait on | |
290 | * outstanding writes to complete so they don't see spurious errors due | |
291 | * to shutting down the allocator: | |
292 | * | |
293 | * If we are doing an emergency shutdown outstanding writes may | |
294 | * hang until we shutdown the allocator so we don't want to wait | |
295 | * on outstanding writes before shutting everything down - but | |
296 | * we do need to wait on them before returning and signalling | |
297 | * that going RO is complete: | |
298 | */ | |
299 | wait_event(bch_read_only_wait, | |
300 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) || | |
301 | test_bit(BCH_FS_EMERGENCY_RO, &c->flags)); | |
302 | ||
303 | __bch2_fs_read_only(c); | |
304 | ||
305 | wait_event(bch_read_only_wait, | |
306 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
307 | ||
308 | clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
309 | ||
310 | if (!bch2_journal_error(&c->journal) && | |
311 | !test_bit(BCH_FS_ERROR, &c->flags) && | |
3aea4342 | 312 | !test_bit(BCH_FS_EMERGENCY_RO, &c->flags) && |
a0e0bda1 | 313 | test_bit(BCH_FS_STARTED, &c->flags) && |
2340fd9d | 314 | test_bit(BCH_FS_ALLOC_CLEAN, &c->flags) && |
b2930396 KO |
315 | !c->opts.norecovery) { |
316 | bch_verbose(c, "marking filesystem clean"); | |
134915f3 | 317 | bch2_fs_mark_clean(c); |
b2930396 | 318 | } |
1c6fdbd8 | 319 | |
134915f3 | 320 | clear_bit(BCH_FS_RW, &c->flags); |
1c6fdbd8 KO |
321 | } |
322 | ||
323 | static void bch2_fs_read_only_work(struct work_struct *work) | |
324 | { | |
325 | struct bch_fs *c = | |
326 | container_of(work, struct bch_fs, read_only_work); | |
327 | ||
1ada1606 | 328 | down_write(&c->state_lock); |
1c6fdbd8 | 329 | bch2_fs_read_only(c); |
1ada1606 | 330 | up_write(&c->state_lock); |
1c6fdbd8 KO |
331 | } |
332 | ||
333 | static void bch2_fs_read_only_async(struct bch_fs *c) | |
334 | { | |
335 | queue_work(system_long_wq, &c->read_only_work); | |
336 | } | |
337 | ||
338 | bool bch2_fs_emergency_read_only(struct bch_fs *c) | |
339 | { | |
340 | bool ret = !test_and_set_bit(BCH_FS_EMERGENCY_RO, &c->flags); | |
341 | ||
1c6fdbd8 | 342 | bch2_journal_halt(&c->journal); |
9f115ce9 | 343 | bch2_fs_read_only_async(c); |
1c6fdbd8 KO |
344 | |
345 | wake_up(&bch_read_only_wait); | |
346 | return ret; | |
347 | } | |
348 | ||
134915f3 | 349 | static int bch2_fs_read_write_late(struct bch_fs *c) |
1c6fdbd8 | 350 | { |
134915f3 | 351 | int ret; |
1c6fdbd8 | 352 | |
134915f3 KO |
353 | ret = bch2_gc_thread_start(c); |
354 | if (ret) { | |
355 | bch_err(c, "error starting gc thread"); | |
356 | return ret; | |
357 | } | |
358 | ||
e6d11615 KO |
359 | ret = bch2_copygc_start(c); |
360 | if (ret) { | |
361 | bch_err(c, "error starting copygc thread"); | |
362 | return ret; | |
134915f3 KO |
363 | } |
364 | ||
365 | ret = bch2_rebalance_start(c); | |
366 | if (ret) { | |
367 | bch_err(c, "error starting rebalance thread"); | |
368 | return ret; | |
369 | } | |
370 | ||
371 | schedule_delayed_work(&c->pd_controllers_update, 5 * HZ); | |
372 | ||
97fd13ad KO |
373 | schedule_work(&c->ec_stripe_delete_work); |
374 | ||
134915f3 KO |
375 | return 0; |
376 | } | |
1c6fdbd8 | 377 | |
e731d466 | 378 | static int __bch2_fs_read_write(struct bch_fs *c, bool early) |
134915f3 KO |
379 | { |
380 | struct bch_dev *ca; | |
381 | unsigned i; | |
382 | int ret; | |
383 | ||
384 | if (test_bit(BCH_FS_RW, &c->flags)) | |
385 | return 0; | |
386 | ||
619f5bee KO |
387 | /* |
388 | * nochanges is used for fsck -n mode - we have to allow going rw | |
389 | * during recovery for that to work: | |
390 | */ | |
391 | if (c->opts.norecovery || | |
392 | (c->opts.nochanges && | |
393 | (!early || c->opts.read_only))) | |
394 | return -EROFS; | |
330581f1 | 395 | |
134915f3 KO |
396 | ret = bch2_fs_mark_dirty(c); |
397 | if (ret) | |
398 | goto err; | |
1c6fdbd8 | 399 | |
9f115ce9 KO |
400 | /* |
401 | * We need to write out a journal entry before we start doing btree | |
402 | * updates, to ensure that on unclean shutdown new journal blacklist | |
403 | * entries are created: | |
404 | */ | |
405 | bch2_journal_meta(&c->journal); | |
406 | ||
2340fd9d KO |
407 | clear_bit(BCH_FS_ALLOC_CLEAN, &c->flags); |
408 | ||
1c6fdbd8 KO |
409 | for_each_rw_member(ca, c, i) |
410 | bch2_dev_allocator_add(c, ca); | |
411 | bch2_recalc_capacity(c); | |
412 | ||
28998019 KO |
413 | bch2_io_timer_add(&c->io_clock[READ], &c->bucket_clock[READ].rescale); |
414 | bch2_io_timer_add(&c->io_clock[WRITE], &c->bucket_clock[WRITE].rescale); | |
415 | ||
134915f3 KO |
416 | for_each_rw_member(ca, c, i) { |
417 | ret = bch2_dev_allocator_start(ca); | |
418 | if (ret) { | |
419 | bch_err(c, "error starting allocator threads"); | |
1c6fdbd8 KO |
420 | percpu_ref_put(&ca->io_ref); |
421 | goto err; | |
422 | } | |
134915f3 | 423 | } |
1c6fdbd8 | 424 | |
134915f3 | 425 | set_bit(BCH_FS_ALLOCATOR_RUNNING, &c->flags); |
1c6fdbd8 | 426 | |
134915f3 KO |
427 | if (!early) { |
428 | ret = bch2_fs_read_write_late(c); | |
429 | if (ret) | |
430 | goto err; | |
431 | } | |
1c6fdbd8 | 432 | |
134915f3 KO |
433 | percpu_ref_reinit(&c->writes); |
434 | set_bit(BCH_FS_RW, &c->flags); | |
1c6fdbd8 | 435 | |
134915f3 KO |
436 | queue_delayed_work(c->journal_reclaim_wq, |
437 | &c->journal.reclaim_work, 0); | |
438 | return 0; | |
1c6fdbd8 KO |
439 | err: |
440 | __bch2_fs_read_only(c); | |
134915f3 KO |
441 | return ret; |
442 | } | |
443 | ||
444 | int bch2_fs_read_write(struct bch_fs *c) | |
445 | { | |
446 | return __bch2_fs_read_write(c, false); | |
447 | } | |
448 | ||
449 | int bch2_fs_read_write_early(struct bch_fs *c) | |
450 | { | |
451 | lockdep_assert_held(&c->state_lock); | |
452 | ||
134915f3 | 453 | return __bch2_fs_read_write(c, true); |
1c6fdbd8 KO |
454 | } |
455 | ||
456 | /* Filesystem startup/shutdown: */ | |
457 | ||
d5e4dcc2 | 458 | static void __bch2_fs_free(struct bch_fs *c) |
1c6fdbd8 KO |
459 | { |
460 | unsigned i; | |
461 | ||
462 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
463 | bch2_time_stats_exit(&c->times[i]); | |
464 | ||
465 | bch2_fs_quota_exit(c); | |
466 | bch2_fs_fsio_exit(c); | |
cd575ddf | 467 | bch2_fs_ec_exit(c); |
1c6fdbd8 KO |
468 | bch2_fs_encryption_exit(c); |
469 | bch2_fs_io_exit(c); | |
c823c339 | 470 | bch2_fs_btree_interior_update_exit(c); |
36e9d698 | 471 | bch2_fs_btree_iter_exit(c); |
2ca88e5a | 472 | bch2_fs_btree_key_cache_exit(&c->btree_key_cache); |
1c6fdbd8 KO |
473 | bch2_fs_btree_cache_exit(c); |
474 | bch2_fs_journal_exit(&c->journal); | |
475 | bch2_io_clock_exit(&c->io_clock[WRITE]); | |
476 | bch2_io_clock_exit(&c->io_clock[READ]); | |
477 | bch2_fs_compress_exit(c); | |
f1d786a0 KO |
478 | bch2_journal_keys_free(&c->journal_keys); |
479 | bch2_journal_entries_free(&c->journal_entries); | |
9166b41d | 480 | percpu_free_rwsem(&c->mark_lock); |
5e82a9a1 | 481 | free_percpu(c->online_reserved); |
4d8100da | 482 | kfree(c->usage_scratch); |
5e82a9a1 | 483 | free_percpu(c->usage[1]); |
9ca53b55 | 484 | free_percpu(c->usage[0]); |
5e82a9a1 | 485 | kfree(c->usage_base); |
5663a415 | 486 | free_percpu(c->pcpu); |
35189e09 | 487 | mempool_exit(&c->large_bkey_pool); |
1c6fdbd8 KO |
488 | mempool_exit(&c->btree_bounce_pool); |
489 | bioset_exit(&c->btree_bio); | |
1c6fdbd8 KO |
490 | mempool_exit(&c->fill_iter); |
491 | percpu_ref_exit(&c->writes); | |
73e6ab95 KO |
492 | kfree(c->replicas.entries); |
493 | kfree(c->replicas_gc.entries); | |
1c6fdbd8 | 494 | kfree(rcu_dereference_protected(c->disk_groups, 1)); |
1dd7f9d9 | 495 | kfree(c->journal_seq_blacklist_table); |
b5e8a699 | 496 | kfree(c->unused_inode_hints); |
e6d11615 | 497 | free_heap(&c->copygc_heap); |
1c6fdbd8 | 498 | |
0519b72d KO |
499 | if (c->journal_reclaim_wq) |
500 | destroy_workqueue(c->journal_reclaim_wq); | |
1c6fdbd8 KO |
501 | if (c->copygc_wq) |
502 | destroy_workqueue(c->copygc_wq); | |
503 | if (c->wq) | |
504 | destroy_workqueue(c->wq); | |
505 | ||
506 | free_pages((unsigned long) c->disk_sb.sb, | |
507 | c->disk_sb.page_order); | |
508 | kvpfree(c, sizeof(*c)); | |
509 | module_put(THIS_MODULE); | |
510 | } | |
511 | ||
512 | static void bch2_fs_release(struct kobject *kobj) | |
513 | { | |
514 | struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); | |
515 | ||
d5e4dcc2 | 516 | __bch2_fs_free(c); |
1c6fdbd8 KO |
517 | } |
518 | ||
d5e4dcc2 | 519 | void __bch2_fs_stop(struct bch_fs *c) |
1c6fdbd8 KO |
520 | { |
521 | struct bch_dev *ca; | |
522 | unsigned i; | |
523 | ||
af1c6871 KO |
524 | bch_verbose(c, "shutting down"); |
525 | ||
1dd7f9d9 KO |
526 | set_bit(BCH_FS_STOPPING, &c->flags); |
527 | ||
528 | cancel_work_sync(&c->journal_seq_blacklist_gc_work); | |
529 | ||
1ada1606 | 530 | down_write(&c->state_lock); |
883f1a7c | 531 | bch2_fs_read_only(c); |
1ada1606 | 532 | up_write(&c->state_lock); |
883f1a7c | 533 | |
1c6fdbd8 KO |
534 | for_each_member_device(ca, c, i) |
535 | if (ca->kobj.state_in_sysfs && | |
536 | ca->disk_sb.bdev) | |
537 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
538 | ||
539 | if (c->kobj.state_in_sysfs) | |
540 | kobject_del(&c->kobj); | |
541 | ||
542 | bch2_fs_debug_exit(c); | |
543 | bch2_fs_chardev_exit(c); | |
544 | ||
545 | kobject_put(&c->time_stats); | |
546 | kobject_put(&c->opts_dir); | |
547 | kobject_put(&c->internal); | |
548 | ||
1c6fdbd8 KO |
549 | /* btree prefetch might have kicked off reads in the background: */ |
550 | bch2_btree_flush_all_reads(c); | |
551 | ||
552 | for_each_member_device(ca, c, i) | |
553 | cancel_work_sync(&ca->io_error_work); | |
554 | ||
555 | cancel_work_sync(&c->btree_write_error_work); | |
556 | cancel_delayed_work_sync(&c->pd_controllers_update); | |
557 | cancel_work_sync(&c->read_only_work); | |
d5e4dcc2 KO |
558 | } |
559 | ||
560 | void bch2_fs_free(struct bch_fs *c) | |
561 | { | |
562 | unsigned i; | |
563 | ||
564 | mutex_lock(&bch_fs_list_lock); | |
565 | list_del(&c->list); | |
566 | mutex_unlock(&bch_fs_list_lock); | |
567 | ||
568 | closure_sync(&c->cl); | |
569 | closure_debug_destroy(&c->cl); | |
570 | ||
571 | for (i = 0; i < c->sb.nr_devices; i++) { | |
572 | struct bch_dev *ca = rcu_dereference_protected(c->devs[i], true); | |
1c6fdbd8 | 573 | |
d5e4dcc2 KO |
574 | if (ca) { |
575 | bch2_free_super(&ca->disk_sb); | |
576 | bch2_dev_free(ca); | |
577 | } | |
578 | } | |
1c6fdbd8 | 579 | |
af1c6871 KO |
580 | bch_verbose(c, "shutdown complete"); |
581 | ||
1c6fdbd8 KO |
582 | kobject_put(&c->kobj); |
583 | } | |
584 | ||
d5e4dcc2 KO |
585 | void bch2_fs_stop(struct bch_fs *c) |
586 | { | |
587 | __bch2_fs_stop(c); | |
588 | bch2_fs_free(c); | |
589 | } | |
590 | ||
1c6fdbd8 KO |
591 | static const char *bch2_fs_online(struct bch_fs *c) |
592 | { | |
593 | struct bch_dev *ca; | |
594 | const char *err = NULL; | |
595 | unsigned i; | |
596 | int ret; | |
597 | ||
598 | lockdep_assert_held(&bch_fs_list_lock); | |
599 | ||
600 | if (!list_empty(&c->list)) | |
601 | return NULL; | |
602 | ||
603 | if (__bch2_uuid_to_fs(c->sb.uuid)) | |
604 | return "filesystem UUID already open"; | |
605 | ||
606 | ret = bch2_fs_chardev_init(c); | |
607 | if (ret) | |
608 | return "error creating character device"; | |
609 | ||
610 | bch2_fs_debug_init(c); | |
611 | ||
612 | if (kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) || | |
613 | kobject_add(&c->internal, &c->kobj, "internal") || | |
614 | kobject_add(&c->opts_dir, &c->kobj, "options") || | |
615 | kobject_add(&c->time_stats, &c->kobj, "time_stats") || | |
616 | bch2_opts_create_sysfs_files(&c->opts_dir)) | |
617 | return "error creating sysfs objects"; | |
618 | ||
1ada1606 | 619 | down_write(&c->state_lock); |
1c6fdbd8 KO |
620 | |
621 | err = "error creating sysfs objects"; | |
622 | __for_each_member_device(ca, c, i, NULL) | |
623 | if (bch2_dev_sysfs_online(c, ca)) | |
624 | goto err; | |
625 | ||
626 | list_add(&c->list, &bch_fs_list); | |
627 | err = NULL; | |
628 | err: | |
1ada1606 | 629 | up_write(&c->state_lock); |
1c6fdbd8 KO |
630 | return err; |
631 | } | |
632 | ||
633 | static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts) | |
634 | { | |
635 | struct bch_sb_field_members *mi; | |
636 | struct bch_fs *c; | |
ecf37a4a | 637 | unsigned i, iter_size; |
1c6fdbd8 KO |
638 | const char *err; |
639 | ||
640 | pr_verbose_init(opts, ""); | |
641 | ||
642 | c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO); | |
643 | if (!c) | |
644 | goto out; | |
645 | ||
646 | __module_get(THIS_MODULE); | |
647 | ||
505b7a4c KO |
648 | closure_init(&c->cl, NULL); |
649 | ||
650 | c->kobj.kset = bcachefs_kset; | |
651 | kobject_init(&c->kobj, &bch2_fs_ktype); | |
652 | kobject_init(&c->internal, &bch2_fs_internal_ktype); | |
653 | kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype); | |
654 | kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype); | |
655 | ||
1c6fdbd8 KO |
656 | c->minor = -1; |
657 | c->disk_sb.fs_sb = true; | |
658 | ||
1ada1606 | 659 | init_rwsem(&c->state_lock); |
1c6fdbd8 KO |
660 | mutex_init(&c->sb_lock); |
661 | mutex_init(&c->replicas_gc_lock); | |
662 | mutex_init(&c->btree_root_lock); | |
663 | INIT_WORK(&c->read_only_work, bch2_fs_read_only_work); | |
664 | ||
665 | init_rwsem(&c->gc_lock); | |
666 | ||
667 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
668 | bch2_time_stats_init(&c->times[i]); | |
669 | ||
e6d11615 | 670 | bch2_fs_copygc_init(c); |
2ca88e5a | 671 | bch2_fs_btree_key_cache_init_early(&c->btree_key_cache); |
b092dadd KO |
672 | bch2_fs_allocator_background_init(c); |
673 | bch2_fs_allocator_foreground_init(c); | |
1c6fdbd8 KO |
674 | bch2_fs_rebalance_init(c); |
675 | bch2_fs_quota_init(c); | |
676 | ||
677 | INIT_LIST_HEAD(&c->list); | |
678 | ||
4d8100da KO |
679 | mutex_init(&c->usage_scratch_lock); |
680 | ||
1c6fdbd8 KO |
681 | mutex_init(&c->bio_bounce_pages_lock); |
682 | ||
683 | bio_list_init(&c->btree_write_error_list); | |
684 | spin_lock_init(&c->btree_write_error_lock); | |
685 | INIT_WORK(&c->btree_write_error_work, bch2_btree_write_error_work); | |
686 | ||
1dd7f9d9 KO |
687 | INIT_WORK(&c->journal_seq_blacklist_gc_work, |
688 | bch2_blacklist_entries_gc); | |
689 | ||
f1d786a0 KO |
690 | INIT_LIST_HEAD(&c->journal_entries); |
691 | ||
1c6fdbd8 KO |
692 | INIT_LIST_HEAD(&c->fsck_errors); |
693 | mutex_init(&c->fsck_error_lock); | |
694 | ||
703e2a43 KO |
695 | INIT_LIST_HEAD(&c->ec_stripe_head_list); |
696 | mutex_init(&c->ec_stripe_head_lock); | |
697 | ||
698 | INIT_LIST_HEAD(&c->ec_stripe_new_list); | |
699 | mutex_init(&c->ec_stripe_new_lock); | |
700 | ||
cd575ddf KO |
701 | spin_lock_init(&c->ec_stripes_heap_lock); |
702 | ||
1c6fdbd8 KO |
703 | seqcount_init(&c->gc_pos_lock); |
704 | ||
5e82a9a1 KO |
705 | seqcount_init(&c->usage_lock); |
706 | ||
1c6fdbd8 KO |
707 | c->copy_gc_enabled = 1; |
708 | c->rebalance.enabled = 1; | |
709 | c->promote_whole_extents = true; | |
710 | ||
711 | c->journal.write_time = &c->times[BCH_TIME_journal_write]; | |
712 | c->journal.delay_time = &c->times[BCH_TIME_journal_delay]; | |
49a67206 | 713 | c->journal.blocked_time = &c->times[BCH_TIME_blocked_journal]; |
1c6fdbd8 KO |
714 | c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq]; |
715 | ||
716 | bch2_fs_btree_cache_init_early(&c->btree_cache); | |
717 | ||
fca1223c KO |
718 | mutex_init(&c->sectors_available_lock); |
719 | ||
73e6ab95 KO |
720 | if (percpu_init_rwsem(&c->mark_lock)) |
721 | goto err; | |
722 | ||
1c6fdbd8 KO |
723 | mutex_lock(&c->sb_lock); |
724 | ||
725 | if (bch2_sb_to_fs(c, sb)) { | |
726 | mutex_unlock(&c->sb_lock); | |
727 | goto err; | |
728 | } | |
729 | ||
730 | mutex_unlock(&c->sb_lock); | |
731 | ||
732 | scnprintf(c->name, sizeof(c->name), "%pU", &c->sb.user_uuid); | |
733 | ||
734 | c->opts = bch2_opts_default; | |
735 | bch2_opts_apply(&c->opts, bch2_opts_from_sb(sb)); | |
736 | bch2_opts_apply(&c->opts, opts); | |
737 | ||
738 | c->block_bits = ilog2(c->opts.block_size); | |
739 | c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c); | |
740 | ||
1c6fdbd8 KO |
741 | if (bch2_fs_init_fault("fs_alloc")) |
742 | goto err; | |
743 | ||
ae2f17d5 | 744 | iter_size = sizeof(struct sort_iter) + |
1c6fdbd8 | 745 | (btree_blocks(c) + 1) * 2 * |
ae2f17d5 | 746 | sizeof(struct sort_iter_set); |
1c6fdbd8 | 747 | |
b5e8a699 KO |
748 | c->inode_shard_bits = ilog2(roundup_pow_of_two(num_possible_cpus())); |
749 | ||
1c6fdbd8 | 750 | if (!(c->wq = alloc_workqueue("bcachefs", |
2f33ece9 KO |
751 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) || |
752 | !(c->copygc_wq = alloc_workqueue("bcachefs_copygc", | |
753 | WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) || | |
754 | !(c->journal_reclaim_wq = alloc_workqueue("bcachefs_journal_reclaim", | |
0519b72d | 755 | WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_HIGHPRI, 1)) || |
134915f3 KO |
756 | percpu_ref_init(&c->writes, bch2_writes_disabled, |
757 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
1c6fdbd8 KO |
758 | mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) || |
759 | bioset_init(&c->btree_bio, 1, | |
760 | max(offsetof(struct btree_read_bio, bio), | |
761 | offsetof(struct btree_write_bio, wbio.bio)), | |
762 | BIOSET_NEED_BVECS) || | |
5663a415 | 763 | !(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) || |
5e82a9a1 | 764 | !(c->online_reserved = alloc_percpu(u64)) || |
1c6fdbd8 KO |
765 | mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1, |
766 | btree_bytes(c)) || | |
35189e09 | 767 | mempool_init_kmalloc_pool(&c->large_bkey_pool, 1, 2048) || |
b5e8a699 KO |
768 | !(c->unused_inode_hints = kcalloc(1U << c->inode_shard_bits, |
769 | sizeof(u64), GFP_KERNEL)) || | |
1c6fdbd8 KO |
770 | bch2_io_clock_init(&c->io_clock[READ]) || |
771 | bch2_io_clock_init(&c->io_clock[WRITE]) || | |
772 | bch2_fs_journal_init(&c->journal) || | |
2c5af169 | 773 | bch2_fs_replicas_init(c) || |
1c6fdbd8 | 774 | bch2_fs_btree_cache_init(c) || |
2ca88e5a | 775 | bch2_fs_btree_key_cache_init(&c->btree_key_cache) || |
36e9d698 | 776 | bch2_fs_btree_iter_init(c) || |
c823c339 | 777 | bch2_fs_btree_interior_update_init(c) || |
1c6fdbd8 KO |
778 | bch2_fs_io_init(c) || |
779 | bch2_fs_encryption_init(c) || | |
780 | bch2_fs_compress_init(c) || | |
cd575ddf | 781 | bch2_fs_ec_init(c) || |
1c6fdbd8 KO |
782 | bch2_fs_fsio_init(c)) |
783 | goto err; | |
784 | ||
785 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
786 | for (i = 0; i < c->sb.nr_devices; i++) | |
787 | if (bch2_dev_exists(c->disk_sb.sb, mi, i) && | |
788 | bch2_dev_alloc(c, i)) | |
789 | goto err; | |
790 | ||
1c6fdbd8 KO |
791 | mutex_lock(&bch_fs_list_lock); |
792 | err = bch2_fs_online(c); | |
793 | mutex_unlock(&bch_fs_list_lock); | |
794 | if (err) { | |
795 | bch_err(c, "bch2_fs_online() error: %s", err); | |
796 | goto err; | |
797 | } | |
798 | out: | |
799 | pr_verbose_init(opts, "ret %i", c ? 0 : -ENOMEM); | |
800 | return c; | |
801 | err: | |
802 | bch2_fs_free(c); | |
803 | c = NULL; | |
804 | goto out; | |
805 | } | |
806 | ||
619f5bee KO |
807 | noinline_for_stack |
808 | static void print_mount_opts(struct bch_fs *c) | |
809 | { | |
810 | enum bch_opt_id i; | |
811 | char buf[512]; | |
812 | struct printbuf p = PBUF(buf); | |
813 | bool first = true; | |
814 | ||
815 | strcpy(buf, "(null)"); | |
816 | ||
817 | if (c->opts.read_only) { | |
818 | pr_buf(&p, "ro"); | |
819 | first = false; | |
820 | } | |
821 | ||
822 | for (i = 0; i < bch2_opts_nr; i++) { | |
823 | const struct bch_option *opt = &bch2_opt_table[i]; | |
824 | u64 v = bch2_opt_get_by_id(&c->opts, i); | |
825 | ||
826 | if (!(opt->mode & OPT_MOUNT)) | |
827 | continue; | |
828 | ||
829 | if (v == bch2_opt_get_by_id(&bch2_opts_default, i)) | |
830 | continue; | |
831 | ||
832 | if (!first) | |
833 | pr_buf(&p, ","); | |
834 | first = false; | |
835 | bch2_opt_to_text(&p, c, opt, v, OPT_SHOW_MOUNT_STYLE); | |
836 | } | |
837 | ||
838 | bch_info(c, "mounted with opts: %s", buf); | |
839 | } | |
840 | ||
841 | int bch2_fs_start(struct bch_fs *c) | |
1c6fdbd8 KO |
842 | { |
843 | const char *err = "cannot allocate memory"; | |
844 | struct bch_sb_field_members *mi; | |
845 | struct bch_dev *ca; | |
a420eea6 | 846 | time64_t now = ktime_get_real_seconds(); |
1c6fdbd8 KO |
847 | unsigned i; |
848 | int ret = -EINVAL; | |
849 | ||
1ada1606 | 850 | down_write(&c->state_lock); |
1c6fdbd8 | 851 | |
134915f3 | 852 | BUG_ON(test_bit(BCH_FS_STARTED, &c->flags)); |
1c6fdbd8 KO |
853 | |
854 | mutex_lock(&c->sb_lock); | |
855 | ||
856 | for_each_online_member(ca, c, i) | |
857 | bch2_sb_from_fs(c, ca); | |
858 | ||
859 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
860 | for_each_online_member(ca, c, i) | |
861 | mi->members[ca->dev_idx].last_mount = cpu_to_le64(now); | |
862 | ||
863 | mutex_unlock(&c->sb_lock); | |
864 | ||
865 | for_each_rw_member(ca, c, i) | |
866 | bch2_dev_allocator_add(c, ca); | |
867 | bch2_recalc_capacity(c); | |
868 | ||
869 | ret = BCH_SB_INITIALIZED(c->disk_sb.sb) | |
870 | ? bch2_fs_recovery(c) | |
871 | : bch2_fs_initialize(c); | |
872 | if (ret) | |
873 | goto err; | |
cd575ddf KO |
874 | |
875 | ret = bch2_opts_check_may_set(c); | |
876 | if (ret) | |
877 | goto err; | |
1c6fdbd8 KO |
878 | |
879 | err = "dynamic fault"; | |
619f5bee | 880 | ret = -EINVAL; |
1c6fdbd8 KO |
881 | if (bch2_fs_init_fault("fs_start")) |
882 | goto err; | |
883 | ||
a9310ab0 KO |
884 | set_bit(BCH_FS_STARTED, &c->flags); |
885 | ||
9f20ed15 KO |
886 | /* |
887 | * Allocator threads don't start filling copygc reserve until after we | |
888 | * set BCH_FS_STARTED - wake them now: | |
889 | */ | |
890 | for_each_online_member(ca, c, i) | |
891 | bch2_wake_allocator(ca); | |
892 | ||
619f5bee | 893 | if (c->opts.read_only || c->opts.nochanges) { |
1c6fdbd8 KO |
894 | bch2_fs_read_only(c); |
895 | } else { | |
619f5bee KO |
896 | err = "error going read write"; |
897 | ret = !test_bit(BCH_FS_RW, &c->flags) | |
898 | ? bch2_fs_read_write(c) | |
899 | : bch2_fs_read_write_late(c); | |
900 | if (ret) | |
1c6fdbd8 KO |
901 | goto err; |
902 | } | |
903 | ||
619f5bee KO |
904 | print_mount_opts(c); |
905 | ret = 0; | |
1c6fdbd8 | 906 | out: |
1ada1606 | 907 | up_write(&c->state_lock); |
619f5bee | 908 | return ret; |
1c6fdbd8 KO |
909 | err: |
910 | switch (ret) { | |
911 | case BCH_FSCK_ERRORS_NOT_FIXED: | |
912 | bch_err(c, "filesystem contains errors: please report this to the developers"); | |
913 | pr_cont("mount with -o fix_errors to repair\n"); | |
914 | err = "fsck error"; | |
915 | break; | |
916 | case BCH_FSCK_REPAIR_UNIMPLEMENTED: | |
917 | bch_err(c, "filesystem contains errors: please report this to the developers"); | |
918 | pr_cont("repair unimplemented: inform the developers so that it can be added\n"); | |
919 | err = "fsck error"; | |
920 | break; | |
921 | case BCH_FSCK_REPAIR_IMPOSSIBLE: | |
922 | bch_err(c, "filesystem contains errors, but repair impossible"); | |
923 | err = "fsck error"; | |
924 | break; | |
925 | case BCH_FSCK_UNKNOWN_VERSION: | |
926 | err = "unknown metadata version";; | |
927 | break; | |
928 | case -ENOMEM: | |
929 | err = "cannot allocate memory"; | |
930 | break; | |
931 | case -EIO: | |
932 | err = "IO error"; | |
933 | break; | |
934 | } | |
935 | ||
9516950c KO |
936 | if (ret >= 0) |
937 | ret = -EIO; | |
1c6fdbd8 KO |
938 | goto out; |
939 | } | |
940 | ||
941 | static const char *bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c) | |
942 | { | |
943 | struct bch_sb_field_members *sb_mi; | |
944 | ||
945 | sb_mi = bch2_sb_get_members(sb); | |
946 | if (!sb_mi) | |
947 | return "Invalid superblock: member info area missing"; | |
948 | ||
949 | if (le16_to_cpu(sb->block_size) != c->opts.block_size) | |
950 | return "mismatched block size"; | |
951 | ||
952 | if (le16_to_cpu(sb_mi->members[sb->dev_idx].bucket_size) < | |
953 | BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb)) | |
954 | return "new cache bucket size is too small"; | |
955 | ||
956 | return NULL; | |
957 | } | |
958 | ||
959 | static const char *bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb) | |
960 | { | |
961 | struct bch_sb *newest = | |
962 | le64_to_cpu(fs->seq) > le64_to_cpu(sb->seq) ? fs : sb; | |
963 | struct bch_sb_field_members *mi = bch2_sb_get_members(newest); | |
964 | ||
965 | if (!uuid_equal(&fs->uuid, &sb->uuid)) | |
966 | return "device not a member of filesystem"; | |
967 | ||
968 | if (!bch2_dev_exists(newest, mi, sb->dev_idx)) | |
969 | return "device has been removed"; | |
970 | ||
971 | if (fs->block_size != sb->block_size) | |
972 | return "mismatched block size"; | |
973 | ||
974 | return NULL; | |
975 | } | |
976 | ||
977 | /* Device startup/shutdown: */ | |
978 | ||
979 | static void bch2_dev_release(struct kobject *kobj) | |
980 | { | |
981 | struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); | |
982 | ||
983 | kfree(ca); | |
984 | } | |
985 | ||
986 | static void bch2_dev_free(struct bch_dev *ca) | |
987 | { | |
988 | cancel_work_sync(&ca->io_error_work); | |
989 | ||
990 | if (ca->kobj.state_in_sysfs && | |
991 | ca->disk_sb.bdev) | |
992 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
993 | ||
994 | if (ca->kobj.state_in_sysfs) | |
995 | kobject_del(&ca->kobj); | |
996 | ||
997 | bch2_free_super(&ca->disk_sb); | |
998 | bch2_dev_journal_exit(ca); | |
999 | ||
1000 | free_percpu(ca->io_done); | |
1001 | bioset_exit(&ca->replica_set); | |
1002 | bch2_dev_buckets_free(ca); | |
d1170ce5 | 1003 | free_page((unsigned long) ca->sb_read_scratch); |
1c6fdbd8 KO |
1004 | |
1005 | bch2_time_stats_exit(&ca->io_latency[WRITE]); | |
1006 | bch2_time_stats_exit(&ca->io_latency[READ]); | |
1007 | ||
1008 | percpu_ref_exit(&ca->io_ref); | |
1009 | percpu_ref_exit(&ca->ref); | |
1010 | kobject_put(&ca->kobj); | |
1011 | } | |
1012 | ||
1013 | static void __bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca) | |
1014 | { | |
1015 | ||
1016 | lockdep_assert_held(&c->state_lock); | |
1017 | ||
1018 | if (percpu_ref_is_zero(&ca->io_ref)) | |
1019 | return; | |
1020 | ||
1021 | __bch2_dev_read_only(c, ca); | |
1022 | ||
1023 | reinit_completion(&ca->io_ref_completion); | |
1024 | percpu_ref_kill(&ca->io_ref); | |
1025 | wait_for_completion(&ca->io_ref_completion); | |
1026 | ||
1027 | if (ca->kobj.state_in_sysfs) { | |
1028 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1029 | sysfs_remove_link(&ca->kobj, "block"); | |
1030 | } | |
1031 | ||
1032 | bch2_free_super(&ca->disk_sb); | |
1033 | bch2_dev_journal_exit(ca); | |
1034 | } | |
1035 | ||
1036 | static void bch2_dev_ref_complete(struct percpu_ref *ref) | |
1037 | { | |
1038 | struct bch_dev *ca = container_of(ref, struct bch_dev, ref); | |
1039 | ||
1040 | complete(&ca->ref_completion); | |
1041 | } | |
1042 | ||
1043 | static void bch2_dev_io_ref_complete(struct percpu_ref *ref) | |
1044 | { | |
1045 | struct bch_dev *ca = container_of(ref, struct bch_dev, io_ref); | |
1046 | ||
1047 | complete(&ca->io_ref_completion); | |
1048 | } | |
1049 | ||
1050 | static int bch2_dev_sysfs_online(struct bch_fs *c, struct bch_dev *ca) | |
1051 | { | |
1052 | int ret; | |
1053 | ||
1054 | if (!c->kobj.state_in_sysfs) | |
1055 | return 0; | |
1056 | ||
1057 | if (!ca->kobj.state_in_sysfs) { | |
1058 | ret = kobject_add(&ca->kobj, &c->kobj, | |
1059 | "dev-%u", ca->dev_idx); | |
1060 | if (ret) | |
1061 | return ret; | |
1062 | } | |
1063 | ||
1064 | if (ca->disk_sb.bdev) { | |
1065 | struct kobject *block = bdev_kobj(ca->disk_sb.bdev); | |
1066 | ||
1067 | ret = sysfs_create_link(block, &ca->kobj, "bcachefs"); | |
1068 | if (ret) | |
1069 | return ret; | |
1070 | ||
1071 | ret = sysfs_create_link(&ca->kobj, block, "block"); | |
1072 | if (ret) | |
1073 | return ret; | |
1074 | } | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c, | |
1080 | struct bch_member *member) | |
1081 | { | |
1082 | struct bch_dev *ca; | |
1083 | ||
1084 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); | |
1085 | if (!ca) | |
1086 | return NULL; | |
1087 | ||
1088 | kobject_init(&ca->kobj, &bch2_dev_ktype); | |
1089 | init_completion(&ca->ref_completion); | |
1090 | init_completion(&ca->io_ref_completion); | |
1091 | ||
1092 | init_rwsem(&ca->bucket_lock); | |
1093 | ||
1c6fdbd8 KO |
1094 | INIT_WORK(&ca->io_error_work, bch2_io_error_work); |
1095 | ||
1096 | bch2_time_stats_init(&ca->io_latency[READ]); | |
1097 | bch2_time_stats_init(&ca->io_latency[WRITE]); | |
1098 | ||
1099 | ca->mi = bch2_mi_to_cpu(member); | |
1100 | ca->uuid = member->uuid; | |
1101 | ||
1102 | if (opt_defined(c->opts, discard)) | |
1103 | ca->mi.discard = opt_get(c->opts, discard); | |
1104 | ||
1105 | if (percpu_ref_init(&ca->ref, bch2_dev_ref_complete, | |
1106 | 0, GFP_KERNEL) || | |
1107 | percpu_ref_init(&ca->io_ref, bch2_dev_io_ref_complete, | |
1108 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d1170ce5 | 1109 | !(ca->sb_read_scratch = (void *) __get_free_page(GFP_KERNEL)) || |
1c6fdbd8 KO |
1110 | bch2_dev_buckets_alloc(c, ca) || |
1111 | bioset_init(&ca->replica_set, 4, | |
1112 | offsetof(struct bch_write_bio, bio), 0) || | |
1113 | !(ca->io_done = alloc_percpu(*ca->io_done))) | |
1114 | goto err; | |
1115 | ||
1116 | return ca; | |
1117 | err: | |
1118 | bch2_dev_free(ca); | |
1119 | return NULL; | |
1120 | } | |
1121 | ||
1122 | static void bch2_dev_attach(struct bch_fs *c, struct bch_dev *ca, | |
1123 | unsigned dev_idx) | |
1124 | { | |
1125 | ca->dev_idx = dev_idx; | |
1126 | __set_bit(ca->dev_idx, ca->self.d); | |
1127 | scnprintf(ca->name, sizeof(ca->name), "dev-%u", dev_idx); | |
1128 | ||
1129 | ca->fs = c; | |
1130 | rcu_assign_pointer(c->devs[ca->dev_idx], ca); | |
1131 | ||
1132 | if (bch2_dev_sysfs_online(c, ca)) | |
1133 | pr_warn("error creating sysfs objects"); | |
1134 | } | |
1135 | ||
1136 | static int bch2_dev_alloc(struct bch_fs *c, unsigned dev_idx) | |
1137 | { | |
1138 | struct bch_member *member = | |
1139 | bch2_sb_get_members(c->disk_sb.sb)->members + dev_idx; | |
1140 | struct bch_dev *ca = NULL; | |
1141 | int ret = 0; | |
1142 | ||
1143 | pr_verbose_init(c->opts, ""); | |
1144 | ||
1145 | if (bch2_fs_init_fault("dev_alloc")) | |
1146 | goto err; | |
1147 | ||
1148 | ca = __bch2_dev_alloc(c, member); | |
1149 | if (!ca) | |
1150 | goto err; | |
1151 | ||
1152 | bch2_dev_attach(c, ca, dev_idx); | |
1153 | out: | |
1154 | pr_verbose_init(c->opts, "ret %i", ret); | |
1155 | return ret; | |
1156 | err: | |
1157 | if (ca) | |
1158 | bch2_dev_free(ca); | |
1159 | ret = -ENOMEM; | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb) | |
1164 | { | |
1165 | unsigned ret; | |
1166 | ||
1167 | if (bch2_dev_is_online(ca)) { | |
1168 | bch_err(ca, "already have device online in slot %u", | |
1169 | sb->sb->dev_idx); | |
1170 | return -EINVAL; | |
1171 | } | |
1172 | ||
1173 | if (get_capacity(sb->bdev->bd_disk) < | |
1174 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1175 | bch_err(ca, "cannot online: device too small"); | |
1176 | return -EINVAL; | |
1177 | } | |
1178 | ||
1179 | BUG_ON(!percpu_ref_is_zero(&ca->io_ref)); | |
1180 | ||
1181 | if (get_capacity(sb->bdev->bd_disk) < | |
1182 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1183 | bch_err(ca, "device too small"); | |
1184 | return -EINVAL; | |
1185 | } | |
1186 | ||
1187 | ret = bch2_dev_journal_init(ca, sb->sb); | |
1188 | if (ret) | |
1189 | return ret; | |
1190 | ||
1191 | /* Commit: */ | |
1192 | ca->disk_sb = *sb; | |
1193 | memset(sb, 0, sizeof(*sb)); | |
1194 | ||
1c6fdbd8 KO |
1195 | percpu_ref_reinit(&ca->io_ref); |
1196 | ||
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb) | |
1201 | { | |
1202 | struct bch_dev *ca; | |
1203 | int ret; | |
1204 | ||
1205 | lockdep_assert_held(&c->state_lock); | |
1206 | ||
1207 | if (le64_to_cpu(sb->sb->seq) > | |
1208 | le64_to_cpu(c->disk_sb.sb->seq)) | |
1209 | bch2_sb_to_fs(c, sb->sb); | |
1210 | ||
1211 | BUG_ON(sb->sb->dev_idx >= c->sb.nr_devices || | |
1212 | !c->devs[sb->sb->dev_idx]); | |
1213 | ||
1214 | ca = bch_dev_locked(c, sb->sb->dev_idx); | |
1215 | ||
1216 | ret = __bch2_dev_attach_bdev(ca, sb); | |
1217 | if (ret) | |
1218 | return ret; | |
1219 | ||
3e0745e2 | 1220 | if (test_bit(BCH_FS_ALLOC_READ_DONE, &c->flags) && |
89fd25be | 1221 | !percpu_u64_get(&ca->usage[0]->buckets[BCH_DATA_sb])) { |
3e0745e2 KO |
1222 | mutex_lock(&c->sb_lock); |
1223 | bch2_mark_dev_superblock(ca->fs, ca, 0); | |
1224 | mutex_unlock(&c->sb_lock); | |
1225 | } | |
6eac2c2e | 1226 | |
1c6fdbd8 KO |
1227 | bch2_dev_sysfs_online(c, ca); |
1228 | ||
1229 | if (c->sb.nr_devices == 1) | |
1230 | snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev); | |
1231 | snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev); | |
1232 | ||
1233 | rebalance_wakeup(c); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
1237 | /* Device management: */ | |
1238 | ||
1239 | /* | |
1240 | * Note: this function is also used by the error paths - when a particular | |
1241 | * device sees an error, we call it to determine whether we can just set the | |
1242 | * device RO, or - if this function returns false - we'll set the whole | |
1243 | * filesystem RO: | |
1244 | * | |
1245 | * XXX: maybe we should be more explicit about whether we're changing state | |
1246 | * because we got an error or what have you? | |
1247 | */ | |
1248 | bool bch2_dev_state_allowed(struct bch_fs *c, struct bch_dev *ca, | |
1249 | enum bch_member_state new_state, int flags) | |
1250 | { | |
1251 | struct bch_devs_mask new_online_devs; | |
1252 | struct replicas_status s; | |
1253 | struct bch_dev *ca2; | |
1254 | int i, nr_rw = 0, required; | |
1255 | ||
1256 | lockdep_assert_held(&c->state_lock); | |
1257 | ||
1258 | switch (new_state) { | |
1259 | case BCH_MEMBER_STATE_RW: | |
1260 | return true; | |
1261 | case BCH_MEMBER_STATE_RO: | |
1262 | if (ca->mi.state != BCH_MEMBER_STATE_RW) | |
1263 | return true; | |
1264 | ||
1265 | /* do we have enough devices to write to? */ | |
1266 | for_each_member_device(ca2, c, i) | |
1267 | if (ca2 != ca) | |
1268 | nr_rw += ca2->mi.state == BCH_MEMBER_STATE_RW; | |
1269 | ||
1270 | required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED) | |
1271 | ? c->opts.metadata_replicas | |
1272 | : c->opts.metadata_replicas_required, | |
1273 | !(flags & BCH_FORCE_IF_DATA_DEGRADED) | |
1274 | ? c->opts.data_replicas | |
1275 | : c->opts.data_replicas_required); | |
1276 | ||
1277 | return nr_rw >= required; | |
1278 | case BCH_MEMBER_STATE_FAILED: | |
1279 | case BCH_MEMBER_STATE_SPARE: | |
1280 | if (ca->mi.state != BCH_MEMBER_STATE_RW && | |
1281 | ca->mi.state != BCH_MEMBER_STATE_RO) | |
1282 | return true; | |
1283 | ||
1284 | /* do we have enough devices to read from? */ | |
1285 | new_online_devs = bch2_online_devs(c); | |
1286 | __clear_bit(ca->dev_idx, new_online_devs.d); | |
1287 | ||
1288 | s = __bch2_replicas_status(c, new_online_devs); | |
1289 | ||
1290 | return bch2_have_enough_devs(s, flags); | |
1291 | default: | |
1292 | BUG(); | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | static bool bch2_fs_may_start(struct bch_fs *c) | |
1297 | { | |
1298 | struct replicas_status s; | |
1299 | struct bch_sb_field_members *mi; | |
1300 | struct bch_dev *ca; | |
1301 | unsigned i, flags = c->opts.degraded | |
1302 | ? BCH_FORCE_IF_DEGRADED | |
1303 | : 0; | |
1304 | ||
1305 | if (!c->opts.degraded) { | |
1306 | mutex_lock(&c->sb_lock); | |
1307 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1308 | ||
1309 | for (i = 0; i < c->disk_sb.sb->nr_devices; i++) { | |
1310 | if (!bch2_dev_exists(c->disk_sb.sb, mi, i)) | |
1311 | continue; | |
1312 | ||
1313 | ca = bch_dev_locked(c, i); | |
1314 | ||
1315 | if (!bch2_dev_is_online(ca) && | |
1316 | (ca->mi.state == BCH_MEMBER_STATE_RW || | |
1317 | ca->mi.state == BCH_MEMBER_STATE_RO)) { | |
1318 | mutex_unlock(&c->sb_lock); | |
1319 | return false; | |
1320 | } | |
1321 | } | |
1322 | mutex_unlock(&c->sb_lock); | |
1323 | } | |
1324 | ||
1325 | s = bch2_replicas_status(c); | |
1326 | ||
1327 | return bch2_have_enough_devs(s, flags); | |
1328 | } | |
1329 | ||
1330 | static void __bch2_dev_read_only(struct bch_fs *c, struct bch_dev *ca) | |
1331 | { | |
74ed7e56 KO |
1332 | /* |
1333 | * Device going read only means the copygc reserve get smaller, so we | |
1334 | * don't want that happening while copygc is in progress: | |
1335 | */ | |
1336 | bch2_copygc_stop(c); | |
1337 | ||
1c6fdbd8 KO |
1338 | /* |
1339 | * The allocator thread itself allocates btree nodes, so stop it first: | |
1340 | */ | |
1341 | bch2_dev_allocator_stop(ca); | |
1342 | bch2_dev_allocator_remove(c, ca); | |
1343 | bch2_dev_journal_stop(&c->journal, ca); | |
74ed7e56 KO |
1344 | |
1345 | bch2_copygc_start(c); | |
1c6fdbd8 KO |
1346 | } |
1347 | ||
1348 | static const char *__bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca) | |
1349 | { | |
1350 | lockdep_assert_held(&c->state_lock); | |
1351 | ||
1352 | BUG_ON(ca->mi.state != BCH_MEMBER_STATE_RW); | |
1353 | ||
1354 | bch2_dev_allocator_add(c, ca); | |
1355 | bch2_recalc_capacity(c); | |
1356 | ||
1357 | if (bch2_dev_allocator_start(ca)) | |
1358 | return "error starting allocator thread"; | |
1359 | ||
1c6fdbd8 KO |
1360 | return NULL; |
1361 | } | |
1362 | ||
1363 | int __bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1364 | enum bch_member_state new_state, int flags) | |
1365 | { | |
1366 | struct bch_sb_field_members *mi; | |
1367 | int ret = 0; | |
1368 | ||
1369 | if (ca->mi.state == new_state) | |
1370 | return 0; | |
1371 | ||
1372 | if (!bch2_dev_state_allowed(c, ca, new_state, flags)) | |
1373 | return -EINVAL; | |
1374 | ||
1375 | if (new_state != BCH_MEMBER_STATE_RW) | |
1376 | __bch2_dev_read_only(c, ca); | |
1377 | ||
1378 | bch_notice(ca, "%s", bch2_dev_state[new_state]); | |
1379 | ||
1380 | mutex_lock(&c->sb_lock); | |
1381 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1382 | SET_BCH_MEMBER_STATE(&mi->members[ca->dev_idx], new_state); | |
1383 | bch2_write_super(c); | |
1384 | mutex_unlock(&c->sb_lock); | |
1385 | ||
1386 | if (new_state == BCH_MEMBER_STATE_RW && | |
1387 | __bch2_dev_read_write(c, ca)) | |
1388 | ret = -ENOMEM; | |
1389 | ||
1390 | rebalance_wakeup(c); | |
1391 | ||
1392 | return ret; | |
1393 | } | |
1394 | ||
1395 | int bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1396 | enum bch_member_state new_state, int flags) | |
1397 | { | |
1398 | int ret; | |
1399 | ||
1ada1606 | 1400 | down_write(&c->state_lock); |
1c6fdbd8 | 1401 | ret = __bch2_dev_set_state(c, ca, new_state, flags); |
1ada1606 | 1402 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1403 | |
1404 | return ret; | |
1405 | } | |
1406 | ||
1407 | /* Device add/removal: */ | |
1408 | ||
5d20ba48 KO |
1409 | int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca) |
1410 | { | |
1411 | struct btree_trans trans; | |
1412 | size_t i; | |
1413 | int ret; | |
1414 | ||
1415 | bch2_trans_init(&trans, c, 0, 0); | |
1416 | ||
1417 | for (i = 0; i < ca->mi.nbuckets; i++) { | |
1418 | ret = bch2_btree_key_cache_flush(&trans, | |
1419 | BTREE_ID_ALLOC, POS(ca->dev_idx, i)); | |
1420 | if (ret) | |
1421 | break; | |
1422 | } | |
1423 | bch2_trans_exit(&trans); | |
1424 | ||
1425 | if (ret) | |
1426 | return ret; | |
1427 | ||
1428 | return bch2_btree_delete_range(c, BTREE_ID_ALLOC, | |
1429 | POS(ca->dev_idx, 0), | |
1430 | POS(ca->dev_idx + 1, 0), | |
1431 | NULL); | |
1432 | } | |
1433 | ||
1c6fdbd8 KO |
1434 | int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags) |
1435 | { | |
1436 | struct bch_sb_field_members *mi; | |
1437 | unsigned dev_idx = ca->dev_idx, data; | |
1438 | int ret = -EINVAL; | |
1439 | ||
1ada1606 | 1440 | down_write(&c->state_lock); |
1c6fdbd8 | 1441 | |
31ba2cd3 KO |
1442 | /* |
1443 | * We consume a reference to ca->ref, regardless of whether we succeed | |
1444 | * or fail: | |
1445 | */ | |
1446 | percpu_ref_put(&ca->ref); | |
1c6fdbd8 KO |
1447 | |
1448 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) { | |
1449 | bch_err(ca, "Cannot remove without losing data"); | |
1450 | goto err; | |
1451 | } | |
1452 | ||
1453 | __bch2_dev_read_only(c, ca); | |
1454 | ||
1c6fdbd8 KO |
1455 | ret = bch2_dev_data_drop(c, ca->dev_idx, flags); |
1456 | if (ret) { | |
1457 | bch_err(ca, "Remove failed: error %i dropping data", ret); | |
1458 | goto err; | |
1459 | } | |
1460 | ||
1461 | ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx); | |
1462 | if (ret) { | |
1463 | bch_err(ca, "Remove failed: error %i flushing journal", ret); | |
1464 | goto err; | |
1465 | } | |
1466 | ||
5d20ba48 | 1467 | ret = bch2_dev_remove_alloc(c, ca); |
1c6fdbd8 KO |
1468 | if (ret) { |
1469 | bch_err(ca, "Remove failed, error deleting alloc info"); | |
1470 | goto err; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * must flush all existing journal entries, they might have | |
1475 | * (overwritten) keys that point to the device we're removing: | |
1476 | */ | |
1477 | bch2_journal_flush_all_pins(&c->journal); | |
31ba2cd3 KO |
1478 | /* |
1479 | * hack to ensure bch2_replicas_gc2() clears out entries to this device | |
1480 | */ | |
1481 | bch2_journal_meta(&c->journal); | |
1c6fdbd8 KO |
1482 | ret = bch2_journal_error(&c->journal); |
1483 | if (ret) { | |
1484 | bch_err(ca, "Remove failed, journal error"); | |
1485 | goto err; | |
1486 | } | |
1487 | ||
31ba2cd3 KO |
1488 | ret = bch2_replicas_gc2(c); |
1489 | if (ret) { | |
1490 | bch_err(ca, "Remove failed: error %i from replicas gc", ret); | |
1491 | goto err; | |
1492 | } | |
1493 | ||
1494 | data = bch2_dev_has_data(c, ca); | |
1495 | if (data) { | |
1496 | char data_has_str[100]; | |
1497 | ||
1498 | bch2_flags_to_text(&PBUF(data_has_str), | |
1499 | bch2_data_types, data); | |
1500 | bch_err(ca, "Remove failed, still has data (%s)", data_has_str); | |
1501 | ret = -EBUSY; | |
1502 | goto err; | |
1503 | } | |
1504 | ||
1c6fdbd8 KO |
1505 | __bch2_dev_offline(c, ca); |
1506 | ||
1507 | mutex_lock(&c->sb_lock); | |
1508 | rcu_assign_pointer(c->devs[ca->dev_idx], NULL); | |
1509 | mutex_unlock(&c->sb_lock); | |
1510 | ||
1511 | percpu_ref_kill(&ca->ref); | |
1512 | wait_for_completion(&ca->ref_completion); | |
1513 | ||
1514 | bch2_dev_free(ca); | |
1515 | ||
1516 | /* | |
1517 | * Free this device's slot in the bch_member array - all pointers to | |
1518 | * this device must be gone: | |
1519 | */ | |
1520 | mutex_lock(&c->sb_lock); | |
1521 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1522 | memset(&mi->members[dev_idx].uuid, 0, sizeof(mi->members[dev_idx].uuid)); | |
1523 | ||
1524 | bch2_write_super(c); | |
1525 | ||
1526 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1527 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1528 | return 0; |
1529 | err: | |
d3bb629d KO |
1530 | if (ca->mi.state == BCH_MEMBER_STATE_RW && |
1531 | !percpu_ref_is_zero(&ca->io_ref)) | |
1c6fdbd8 | 1532 | __bch2_dev_read_write(c, ca); |
1ada1606 | 1533 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1534 | return ret; |
1535 | } | |
1536 | ||
6eac2c2e KO |
1537 | static void dev_usage_clear(struct bch_dev *ca) |
1538 | { | |
1539 | struct bucket_array *buckets; | |
6eac2c2e | 1540 | |
5e82a9a1 | 1541 | percpu_memset(ca->usage[0], 0, sizeof(*ca->usage[0])); |
6eac2c2e KO |
1542 | |
1543 | down_read(&ca->bucket_lock); | |
1544 | buckets = bucket_array(ca); | |
1545 | ||
1546 | memset(buckets->b, 0, sizeof(buckets->b[0]) * buckets->nbuckets); | |
1547 | up_read(&ca->bucket_lock); | |
1548 | } | |
1549 | ||
1c6fdbd8 KO |
1550 | /* Add new device to running filesystem: */ |
1551 | int bch2_dev_add(struct bch_fs *c, const char *path) | |
1552 | { | |
1553 | struct bch_opts opts = bch2_opts_empty(); | |
1554 | struct bch_sb_handle sb; | |
1555 | const char *err; | |
1556 | struct bch_dev *ca = NULL; | |
1557 | struct bch_sb_field_members *mi; | |
1558 | struct bch_member dev_mi; | |
1559 | unsigned dev_idx, nr_devices, u64s; | |
1560 | int ret; | |
1561 | ||
1562 | ret = bch2_read_super(path, &opts, &sb); | |
1563 | if (ret) | |
1564 | return ret; | |
1565 | ||
1566 | err = bch2_sb_validate(&sb); | |
1567 | if (err) | |
1568 | return -EINVAL; | |
1569 | ||
1570 | dev_mi = bch2_sb_get_members(sb.sb)->members[sb.sb->dev_idx]; | |
1571 | ||
1572 | err = bch2_dev_may_add(sb.sb, c); | |
1573 | if (err) | |
1574 | return -EINVAL; | |
1575 | ||
1576 | ca = __bch2_dev_alloc(c, &dev_mi); | |
1577 | if (!ca) { | |
1578 | bch2_free_super(&sb); | |
1579 | return -ENOMEM; | |
1580 | } | |
1581 | ||
1582 | ret = __bch2_dev_attach_bdev(ca, &sb); | |
1583 | if (ret) { | |
1584 | bch2_dev_free(ca); | |
1585 | return ret; | |
1586 | } | |
1587 | ||
6eac2c2e KO |
1588 | /* |
1589 | * We want to allocate journal on the new device before adding the new | |
1590 | * device to the filesystem because allocating after we attach requires | |
1591 | * spinning up the allocator thread, and the allocator thread requires | |
1592 | * doing btree writes, which if the existing devices are RO isn't going | |
1593 | * to work | |
1594 | * | |
1595 | * So we have to mark where the superblocks are, but marking allocated | |
1596 | * data normally updates the filesystem usage too, so we have to mark, | |
1597 | * allocate the journal, reset all the marks, then remark after we | |
1598 | * attach... | |
1599 | */ | |
9ca53b55 | 1600 | bch2_mark_dev_superblock(ca->fs, ca, 0); |
6eac2c2e | 1601 | |
1c6fdbd8 KO |
1602 | err = "journal alloc failed"; |
1603 | ret = bch2_dev_journal_alloc(ca); | |
1604 | if (ret) | |
1605 | goto err; | |
1606 | ||
6eac2c2e KO |
1607 | dev_usage_clear(ca); |
1608 | ||
1ada1606 | 1609 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1610 | mutex_lock(&c->sb_lock); |
1611 | ||
1612 | err = "insufficient space in new superblock"; | |
1613 | ret = bch2_sb_from_fs(c, ca); | |
1614 | if (ret) | |
1615 | goto err_unlock; | |
1616 | ||
1617 | mi = bch2_sb_get_members(ca->disk_sb.sb); | |
1618 | ||
1619 | if (!bch2_sb_resize_members(&ca->disk_sb, | |
1620 | le32_to_cpu(mi->field.u64s) + | |
1621 | sizeof(dev_mi) / sizeof(u64))) { | |
1622 | ret = -ENOSPC; | |
1623 | goto err_unlock; | |
1624 | } | |
1625 | ||
1626 | if (dynamic_fault("bcachefs:add:no_slot")) | |
1627 | goto no_slot; | |
1628 | ||
1629 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1630 | for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++) | |
1631 | if (!bch2_dev_exists(c->disk_sb.sb, mi, dev_idx)) | |
1632 | goto have_slot; | |
1633 | no_slot: | |
1634 | err = "no slots available in superblock"; | |
1635 | ret = -ENOSPC; | |
1636 | goto err_unlock; | |
1637 | ||
1638 | have_slot: | |
1639 | nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices); | |
1640 | u64s = (sizeof(struct bch_sb_field_members) + | |
1641 | sizeof(struct bch_member) * nr_devices) / sizeof(u64); | |
1642 | ||
1643 | err = "no space in superblock for member info"; | |
1644 | ret = -ENOSPC; | |
1645 | ||
1646 | mi = bch2_sb_resize_members(&c->disk_sb, u64s); | |
1647 | if (!mi) | |
1648 | goto err_unlock; | |
1649 | ||
1650 | /* success: */ | |
1651 | ||
1652 | mi->members[dev_idx] = dev_mi; | |
a420eea6 | 1653 | mi->members[dev_idx].last_mount = cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1654 | c->disk_sb.sb->nr_devices = nr_devices; |
1655 | ||
1656 | ca->disk_sb.sb->dev_idx = dev_idx; | |
1657 | bch2_dev_attach(c, ca, dev_idx); | |
1658 | ||
9ca53b55 | 1659 | bch2_mark_dev_superblock(c, ca, 0); |
6eac2c2e | 1660 | |
1c6fdbd8 KO |
1661 | bch2_write_super(c); |
1662 | mutex_unlock(&c->sb_lock); | |
1663 | ||
8d6b6222 KO |
1664 | err = "alloc write failed"; |
1665 | ret = bch2_dev_alloc_write(c, ca, 0); | |
1666 | if (ret) | |
1667 | goto err; | |
1668 | ||
1c6fdbd8 KO |
1669 | if (ca->mi.state == BCH_MEMBER_STATE_RW) { |
1670 | err = __bch2_dev_read_write(c, ca); | |
1671 | if (err) | |
1672 | goto err_late; | |
1673 | } | |
1674 | ||
1ada1606 | 1675 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1676 | return 0; |
1677 | ||
1678 | err_unlock: | |
1679 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1680 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1681 | err: |
1682 | if (ca) | |
1683 | bch2_dev_free(ca); | |
1684 | bch2_free_super(&sb); | |
1685 | bch_err(c, "Unable to add device: %s", err); | |
1686 | return ret; | |
1687 | err_late: | |
1688 | bch_err(c, "Error going rw after adding device: %s", err); | |
1689 | return -EINVAL; | |
1690 | } | |
1691 | ||
1692 | /* Hot add existing device to running filesystem: */ | |
1693 | int bch2_dev_online(struct bch_fs *c, const char *path) | |
1694 | { | |
1695 | struct bch_opts opts = bch2_opts_empty(); | |
1696 | struct bch_sb_handle sb = { NULL }; | |
1697 | struct bch_sb_field_members *mi; | |
1698 | struct bch_dev *ca; | |
1699 | unsigned dev_idx; | |
1700 | const char *err; | |
1701 | int ret; | |
1702 | ||
1ada1606 | 1703 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1704 | |
1705 | ret = bch2_read_super(path, &opts, &sb); | |
1706 | if (ret) { | |
1ada1606 | 1707 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1708 | return ret; |
1709 | } | |
1710 | ||
1711 | dev_idx = sb.sb->dev_idx; | |
1712 | ||
1713 | err = bch2_dev_in_fs(c->disk_sb.sb, sb.sb); | |
1714 | if (err) | |
1715 | goto err; | |
1716 | ||
1717 | if (bch2_dev_attach_bdev(c, &sb)) { | |
1718 | err = "bch2_dev_attach_bdev() error"; | |
1719 | goto err; | |
1720 | } | |
1721 | ||
1722 | ca = bch_dev_locked(c, dev_idx); | |
1723 | if (ca->mi.state == BCH_MEMBER_STATE_RW) { | |
1724 | err = __bch2_dev_read_write(c, ca); | |
1725 | if (err) | |
1726 | goto err; | |
1727 | } | |
1728 | ||
1729 | mutex_lock(&c->sb_lock); | |
1730 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1731 | ||
1732 | mi->members[ca->dev_idx].last_mount = | |
a420eea6 | 1733 | cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1734 | |
1735 | bch2_write_super(c); | |
1736 | mutex_unlock(&c->sb_lock); | |
1737 | ||
1ada1606 | 1738 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1739 | return 0; |
1740 | err: | |
1ada1606 | 1741 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1742 | bch2_free_super(&sb); |
1743 | bch_err(c, "error bringing %s online: %s", path, err); | |
1744 | return -EINVAL; | |
1745 | } | |
1746 | ||
1747 | int bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca, int flags) | |
1748 | { | |
1ada1606 | 1749 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1750 | |
1751 | if (!bch2_dev_is_online(ca)) { | |
1752 | bch_err(ca, "Already offline"); | |
1ada1606 | 1753 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1754 | return 0; |
1755 | } | |
1756 | ||
1757 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_FAILED, flags)) { | |
1758 | bch_err(ca, "Cannot offline required disk"); | |
1ada1606 | 1759 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1760 | return -EINVAL; |
1761 | } | |
1762 | ||
1763 | __bch2_dev_offline(c, ca); | |
1764 | ||
1ada1606 | 1765 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1766 | return 0; |
1767 | } | |
1768 | ||
1769 | int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets) | |
1770 | { | |
1771 | struct bch_member *mi; | |
1772 | int ret = 0; | |
1773 | ||
1ada1606 | 1774 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1775 | |
1776 | if (nbuckets < ca->mi.nbuckets) { | |
1777 | bch_err(ca, "Cannot shrink yet"); | |
1778 | ret = -EINVAL; | |
1779 | goto err; | |
1780 | } | |
1781 | ||
1782 | if (bch2_dev_is_online(ca) && | |
1783 | get_capacity(ca->disk_sb.bdev->bd_disk) < | |
1784 | ca->mi.bucket_size * nbuckets) { | |
1785 | bch_err(ca, "New size larger than device"); | |
1786 | ret = -EINVAL; | |
1787 | goto err; | |
1788 | } | |
1789 | ||
1790 | ret = bch2_dev_buckets_resize(c, ca, nbuckets); | |
1791 | if (ret) { | |
1792 | bch_err(ca, "Resize error: %i", ret); | |
1793 | goto err; | |
1794 | } | |
1795 | ||
1796 | mutex_lock(&c->sb_lock); | |
1797 | mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx]; | |
1798 | mi->nbuckets = cpu_to_le64(nbuckets); | |
1799 | ||
1800 | bch2_write_super(c); | |
1801 | mutex_unlock(&c->sb_lock); | |
1802 | ||
1803 | bch2_recalc_capacity(c); | |
1804 | err: | |
1ada1606 | 1805 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1806 | return ret; |
1807 | } | |
1808 | ||
1809 | /* return with ref on ca->ref: */ | |
1810 | struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *path) | |
1811 | { | |
1c6fdbd8 KO |
1812 | struct bch_dev *ca; |
1813 | dev_t dev; | |
1814 | unsigned i; | |
1815 | int ret; | |
1816 | ||
1817 | ret = lookup_bdev(path, &dev); | |
1818 | if (ret) | |
1819 | return ERR_PTR(ret); | |
1820 | ||
1821 | for_each_member_device(ca, c, i) | |
1822 | if (ca->disk_sb.bdev->bd_dev == dev) | |
1823 | goto found; | |
1824 | ||
1825 | ca = ERR_PTR(-ENOENT); | |
1826 | found: | |
1827 | return ca; | |
1828 | } | |
1829 | ||
1830 | /* Filesystem open: */ | |
1831 | ||
1832 | struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices, | |
1833 | struct bch_opts opts) | |
1834 | { | |
1835 | struct bch_sb_handle *sb = NULL; | |
1836 | struct bch_fs *c = NULL; | |
625104ea | 1837 | struct bch_sb_field_members *mi; |
1c6fdbd8 KO |
1838 | unsigned i, best_sb = 0; |
1839 | const char *err; | |
1840 | int ret = -ENOMEM; | |
1841 | ||
1842 | pr_verbose_init(opts, ""); | |
1843 | ||
1844 | if (!nr_devices) { | |
1845 | c = ERR_PTR(-EINVAL); | |
1846 | goto out2; | |
1847 | } | |
1848 | ||
1849 | if (!try_module_get(THIS_MODULE)) { | |
1850 | c = ERR_PTR(-ENODEV); | |
1851 | goto out2; | |
1852 | } | |
1853 | ||
1854 | sb = kcalloc(nr_devices, sizeof(*sb), GFP_KERNEL); | |
1855 | if (!sb) | |
1856 | goto err; | |
1857 | ||
1858 | for (i = 0; i < nr_devices; i++) { | |
1859 | ret = bch2_read_super(devices[i], &opts, &sb[i]); | |
1860 | if (ret) | |
1861 | goto err; | |
1862 | ||
1863 | err = bch2_sb_validate(&sb[i]); | |
1864 | if (err) | |
1865 | goto err_print; | |
1866 | } | |
1867 | ||
1868 | for (i = 1; i < nr_devices; i++) | |
1869 | if (le64_to_cpu(sb[i].sb->seq) > | |
1870 | le64_to_cpu(sb[best_sb].sb->seq)) | |
1871 | best_sb = i; | |
1872 | ||
625104ea KO |
1873 | mi = bch2_sb_get_members(sb[best_sb].sb); |
1874 | ||
1875 | i = 0; | |
1876 | while (i < nr_devices) { | |
1877 | if (i != best_sb && | |
1878 | !bch2_dev_exists(sb[best_sb].sb, mi, sb[i].sb->dev_idx)) { | |
1879 | pr_info("%pg has been removed, skipping", sb[i].bdev); | |
1880 | bch2_free_super(&sb[i]); | |
1881 | array_remove_item(sb, nr_devices, i); | |
1882 | continue; | |
1883 | } | |
1884 | ||
1c6fdbd8 KO |
1885 | err = bch2_dev_in_fs(sb[best_sb].sb, sb[i].sb); |
1886 | if (err) | |
1887 | goto err_print; | |
625104ea | 1888 | i++; |
1c6fdbd8 KO |
1889 | } |
1890 | ||
1891 | ret = -ENOMEM; | |
1892 | c = bch2_fs_alloc(sb[best_sb].sb, opts); | |
1893 | if (!c) | |
1894 | goto err; | |
1895 | ||
1896 | err = "bch2_dev_online() error"; | |
1ada1606 | 1897 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1898 | for (i = 0; i < nr_devices; i++) |
1899 | if (bch2_dev_attach_bdev(c, &sb[i])) { | |
1ada1606 | 1900 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1901 | goto err_print; |
1902 | } | |
1ada1606 | 1903 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1904 | |
1905 | err = "insufficient devices"; | |
1906 | if (!bch2_fs_may_start(c)) | |
1907 | goto err_print; | |
1908 | ||
1909 | if (!c->opts.nostart) { | |
619f5bee KO |
1910 | ret = bch2_fs_start(c); |
1911 | if (ret) | |
1912 | goto err; | |
1c6fdbd8 KO |
1913 | } |
1914 | out: | |
1915 | kfree(sb); | |
1916 | module_put(THIS_MODULE); | |
1917 | out2: | |
1918 | pr_verbose_init(opts, "ret %i", PTR_ERR_OR_ZERO(c)); | |
1919 | return c; | |
1920 | err_print: | |
1921 | pr_err("bch_fs_open err opening %s: %s", | |
1922 | devices[0], err); | |
1923 | ret = -EINVAL; | |
1924 | err: | |
1925 | if (c) | |
1926 | bch2_fs_stop(c); | |
1927 | for (i = 0; i < nr_devices; i++) | |
1928 | bch2_free_super(&sb[i]); | |
1929 | c = ERR_PTR(ret); | |
1930 | goto out; | |
1931 | } | |
1932 | ||
1933 | static const char *__bch2_fs_open_incremental(struct bch_sb_handle *sb, | |
1934 | struct bch_opts opts) | |
1935 | { | |
1936 | const char *err; | |
1937 | struct bch_fs *c; | |
1938 | bool allocated_fs = false; | |
619f5bee | 1939 | int ret; |
1c6fdbd8 KO |
1940 | |
1941 | err = bch2_sb_validate(sb); | |
1942 | if (err) | |
1943 | return err; | |
1944 | ||
1945 | mutex_lock(&bch_fs_list_lock); | |
1946 | c = __bch2_uuid_to_fs(sb->sb->uuid); | |
1947 | if (c) { | |
1948 | closure_get(&c->cl); | |
1949 | ||
1950 | err = bch2_dev_in_fs(c->disk_sb.sb, sb->sb); | |
1951 | if (err) | |
1952 | goto err; | |
1953 | } else { | |
1954 | c = bch2_fs_alloc(sb->sb, opts); | |
1955 | err = "cannot allocate memory"; | |
1956 | if (!c) | |
1957 | goto err; | |
1958 | ||
1959 | allocated_fs = true; | |
1960 | } | |
1961 | ||
1962 | err = "bch2_dev_online() error"; | |
1963 | ||
1964 | mutex_lock(&c->sb_lock); | |
1965 | if (bch2_dev_attach_bdev(c, sb)) { | |
1966 | mutex_unlock(&c->sb_lock); | |
1967 | goto err; | |
1968 | } | |
1969 | mutex_unlock(&c->sb_lock); | |
1970 | ||
1971 | if (!c->opts.nostart && bch2_fs_may_start(c)) { | |
619f5bee KO |
1972 | err = "error starting filesystem"; |
1973 | ret = bch2_fs_start(c); | |
1974 | if (ret) | |
1c6fdbd8 KO |
1975 | goto err; |
1976 | } | |
1977 | ||
1978 | closure_put(&c->cl); | |
1979 | mutex_unlock(&bch_fs_list_lock); | |
1980 | ||
1981 | return NULL; | |
1982 | err: | |
1983 | mutex_unlock(&bch_fs_list_lock); | |
1984 | ||
1985 | if (allocated_fs) | |
1986 | bch2_fs_stop(c); | |
1987 | else if (c) | |
1988 | closure_put(&c->cl); | |
1989 | ||
1990 | return err; | |
1991 | } | |
1992 | ||
1993 | const char *bch2_fs_open_incremental(const char *path) | |
1994 | { | |
1995 | struct bch_sb_handle sb; | |
1996 | struct bch_opts opts = bch2_opts_empty(); | |
1997 | const char *err; | |
1998 | ||
1999 | if (bch2_read_super(path, &opts, &sb)) | |
2000 | return "error reading superblock"; | |
2001 | ||
2002 | err = __bch2_fs_open_incremental(&sb, opts); | |
2003 | bch2_free_super(&sb); | |
2004 | ||
2005 | return err; | |
2006 | } | |
2007 | ||
2008 | /* Global interfaces/init */ | |
2009 | ||
2010 | static void bcachefs_exit(void) | |
2011 | { | |
2012 | bch2_debug_exit(); | |
2013 | bch2_vfs_exit(); | |
2014 | bch2_chardev_exit(); | |
2015 | if (bcachefs_kset) | |
2016 | kset_unregister(bcachefs_kset); | |
2017 | } | |
2018 | ||
2019 | static int __init bcachefs_init(void) | |
2020 | { | |
2021 | bch2_bkey_pack_test(); | |
2022 | bch2_inode_pack_test(); | |
2023 | ||
2024 | if (!(bcachefs_kset = kset_create_and_add("bcachefs", NULL, fs_kobj)) || | |
2025 | bch2_chardev_init() || | |
2026 | bch2_vfs_init() || | |
2027 | bch2_debug_init()) | |
2028 | goto err; | |
2029 | ||
2030 | return 0; | |
2031 | err: | |
2032 | bcachefs_exit(); | |
2033 | return -ENOMEM; | |
2034 | } | |
2035 | ||
2036 | #define BCH_DEBUG_PARAM(name, description) \ | |
2037 | bool bch2_##name; \ | |
2038 | module_param_named(name, bch2_##name, bool, 0644); \ | |
2039 | MODULE_PARM_DESC(name, description); | |
2040 | BCH_DEBUG_PARAMS() | |
2041 | #undef BCH_DEBUG_PARAM | |
2042 | ||
26609b61 | 2043 | unsigned bch2_metadata_version = bcachefs_metadata_version_current; |
1c6fdbd8 KO |
2044 | module_param_named(version, bch2_metadata_version, uint, 0400); |
2045 | ||
2046 | module_exit(bcachefs_exit); | |
2047 | module_init(bcachefs_init); |