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" | |
21aec962 | 19 | #include "buckets_waiting_for_journal.h" |
1c6fdbd8 KO |
20 | #include "chardev.h" |
21 | #include "checksum.h" | |
22 | #include "clock.h" | |
23 | #include "compress.h" | |
104c6974 | 24 | #include "counters.h" |
1c6fdbd8 KO |
25 | #include "debug.h" |
26 | #include "disk_groups.h" | |
cd575ddf | 27 | #include "ec.h" |
d4bf5eec | 28 | #include "errcode.h" |
1c6fdbd8 KO |
29 | #include "error.h" |
30 | #include "fs.h" | |
31 | #include "fs-io.h" | |
32 | #include "fsck.h" | |
33 | #include "inode.h" | |
34 | #include "io.h" | |
35 | #include "journal.h" | |
36 | #include "journal_reclaim.h" | |
1dd7f9d9 | 37 | #include "journal_seq_blacklist.h" |
1c6fdbd8 KO |
38 | #include "move.h" |
39 | #include "migrate.h" | |
40 | #include "movinggc.h" | |
41 | #include "quota.h" | |
42 | #include "rebalance.h" | |
43 | #include "recovery.h" | |
44 | #include "replicas.h" | |
14b393ee | 45 | #include "subvolume.h" |
1c6fdbd8 KO |
46 | #include "super.h" |
47 | #include "super-io.h" | |
48 | #include "sysfs.h" | |
49 | #include "trace.h" | |
50 | ||
51 | #include <linux/backing-dev.h> | |
52 | #include <linux/blkdev.h> | |
53 | #include <linux/debugfs.h> | |
54 | #include <linux/device.h> | |
55 | #include <linux/idr.h> | |
1c6fdbd8 KO |
56 | #include <linux/module.h> |
57 | #include <linux/percpu.h> | |
58 | #include <linux/random.h> | |
59 | #include <linux/sysfs.h> | |
60 | #include <crypto/hash.h> | |
61 | ||
62 | MODULE_LICENSE("GPL"); | |
63 | MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>"); | |
64 | ||
65 | #define KTYPE(type) \ | |
66 | static const struct attribute_group type ## _group = { \ | |
67 | .attrs = type ## _files \ | |
68 | }; \ | |
69 | \ | |
70 | static const struct attribute_group *type ## _groups[] = { \ | |
71 | &type ## _group, \ | |
72 | NULL \ | |
73 | }; \ | |
74 | \ | |
75 | static const struct kobj_type type ## _ktype = { \ | |
76 | .release = type ## _release, \ | |
77 | .sysfs_ops = &type ## _sysfs_ops, \ | |
78 | .default_groups = type ## _groups \ | |
79 | } | |
80 | ||
81 | static void bch2_fs_release(struct kobject *); | |
82 | static void bch2_dev_release(struct kobject *); | |
104c6974 DH |
83 | static void bch2_fs_counters_release(struct kobject *k) |
84 | { | |
85 | } | |
1c6fdbd8 KO |
86 | |
87 | static void bch2_fs_internal_release(struct kobject *k) | |
88 | { | |
89 | } | |
90 | ||
91 | static void bch2_fs_opts_dir_release(struct kobject *k) | |
92 | { | |
93 | } | |
94 | ||
95 | static void bch2_fs_time_stats_release(struct kobject *k) | |
96 | { | |
97 | } | |
98 | ||
99 | KTYPE(bch2_fs); | |
104c6974 | 100 | KTYPE(bch2_fs_counters); |
1c6fdbd8 KO |
101 | KTYPE(bch2_fs_internal); |
102 | KTYPE(bch2_fs_opts_dir); | |
103 | KTYPE(bch2_fs_time_stats); | |
104 | KTYPE(bch2_dev); | |
105 | ||
106 | static struct kset *bcachefs_kset; | |
107 | static LIST_HEAD(bch_fs_list); | |
108 | static DEFINE_MUTEX(bch_fs_list_lock); | |
109 | ||
110 | static DECLARE_WAIT_QUEUE_HEAD(bch_read_only_wait); | |
111 | ||
112 | static void bch2_dev_free(struct bch_dev *); | |
113 | static int bch2_dev_alloc(struct bch_fs *, unsigned); | |
114 | static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *); | |
115 | static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *); | |
116 | ||
117 | struct bch_fs *bch2_dev_to_fs(dev_t dev) | |
118 | { | |
119 | struct bch_fs *c; | |
120 | struct bch_dev *ca; | |
121 | unsigned i; | |
122 | ||
123 | mutex_lock(&bch_fs_list_lock); | |
124 | rcu_read_lock(); | |
125 | ||
126 | list_for_each_entry(c, &bch_fs_list, list) | |
127 | for_each_member_device_rcu(ca, c, i, NULL) | |
ec4ab9d2 | 128 | if (ca->disk_sb.bdev && ca->disk_sb.bdev->bd_dev == dev) { |
1c6fdbd8 KO |
129 | closure_get(&c->cl); |
130 | goto found; | |
131 | } | |
132 | c = NULL; | |
133 | found: | |
134 | rcu_read_unlock(); | |
135 | mutex_unlock(&bch_fs_list_lock); | |
136 | ||
137 | return c; | |
138 | } | |
139 | ||
140 | static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid) | |
141 | { | |
142 | struct bch_fs *c; | |
143 | ||
144 | lockdep_assert_held(&bch_fs_list_lock); | |
145 | ||
146 | list_for_each_entry(c, &bch_fs_list, list) | |
147 | if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid))) | |
148 | return c; | |
149 | ||
150 | return NULL; | |
151 | } | |
152 | ||
153 | struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid) | |
154 | { | |
155 | struct bch_fs *c; | |
156 | ||
157 | mutex_lock(&bch_fs_list_lock); | |
158 | c = __bch2_uuid_to_fs(uuid); | |
159 | if (c) | |
160 | closure_get(&c->cl); | |
161 | mutex_unlock(&bch_fs_list_lock); | |
162 | ||
163 | return c; | |
164 | } | |
165 | ||
180fb49d KO |
166 | static void bch2_dev_usage_journal_reserve(struct bch_fs *c) |
167 | { | |
168 | struct bch_dev *ca; | |
169 | unsigned i, nr = 0, u64s = | |
4b8f89af KO |
170 | ((sizeof(struct jset_entry_dev_usage) + |
171 | sizeof(struct jset_entry_dev_usage_type) * BCH_DATA_NR)) / | |
172 | sizeof(u64); | |
180fb49d KO |
173 | |
174 | rcu_read_lock(); | |
175 | for_each_member_device_rcu(ca, c, i, NULL) | |
176 | nr++; | |
177 | rcu_read_unlock(); | |
178 | ||
179 | bch2_journal_entry_res_resize(&c->journal, | |
180 | &c->dev_usage_journal_res, u64s * nr); | |
181 | } | |
182 | ||
1c6fdbd8 KO |
183 | /* Filesystem RO/RW: */ |
184 | ||
185 | /* | |
186 | * For startup/shutdown of RW stuff, the dependencies are: | |
187 | * | |
188 | * - foreground writes depend on copygc and rebalance (to free up space) | |
189 | * | |
190 | * - copygc and rebalance depend on mark and sweep gc (they actually probably | |
191 | * don't because they either reserve ahead of time or don't block if | |
192 | * allocations fail, but allocations can require mark and sweep gc to run | |
193 | * because of generation number wraparound) | |
194 | * | |
195 | * - all of the above depends on the allocator threads | |
196 | * | |
197 | * - allocator depends on the journal (when it rewrites prios and gens) | |
198 | */ | |
199 | ||
200 | static void __bch2_fs_read_only(struct bch_fs *c) | |
201 | { | |
202 | struct bch_dev *ca; | |
d5f70c1f | 203 | unsigned i, clean_passes = 0; |
c0960603 | 204 | u64 seq = 0; |
1c6fdbd8 KO |
205 | |
206 | bch2_rebalance_stop(c); | |
e6d11615 | 207 | bch2_copygc_stop(c); |
1c6fdbd8 KO |
208 | bch2_gc_thread_stop(c); |
209 | ||
039fc4c5 | 210 | bch_verbose(c, "flushing journal and stopping allocators"); |
460651ee | 211 | |
039fc4c5 KO |
212 | do { |
213 | clean_passes++; | |
430735cd | 214 | |
c0960603 KO |
215 | if (bch2_btree_interior_updates_flush(c) || |
216 | bch2_journal_flush_all_pins(&c->journal) || | |
217 | bch2_btree_flush_all_writes(c) || | |
218 | seq != atomic64_read(&c->journal.seq)) { | |
219 | seq = atomic64_read(&c->journal.seq); | |
039fc4c5 KO |
220 | clean_passes = 0; |
221 | } | |
d5f70c1f | 222 | } while (clean_passes < 2); |
2340fd9d | 223 | |
c0960603 | 224 | bch_verbose(c, "flushing journal and stopping allocators complete"); |
00b8ccf7 | 225 | |
c0960603 KO |
226 | if (test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags) && |
227 | !test_bit(BCH_FS_EMERGENCY_RO, &c->flags)) | |
228 | set_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags); | |
1c6fdbd8 KO |
229 | bch2_fs_journal_stop(&c->journal); |
230 | ||
1c6fdbd8 KO |
231 | /* |
232 | * After stopping journal: | |
233 | */ | |
234 | for_each_member_device(ca, c, i) | |
235 | bch2_dev_allocator_remove(c, ca); | |
236 | } | |
237 | ||
238 | static void bch2_writes_disabled(struct percpu_ref *writes) | |
239 | { | |
240 | struct bch_fs *c = container_of(writes, struct bch_fs, writes); | |
241 | ||
242 | set_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
243 | wake_up(&bch_read_only_wait); | |
244 | } | |
245 | ||
246 | void bch2_fs_read_only(struct bch_fs *c) | |
247 | { | |
134915f3 | 248 | if (!test_bit(BCH_FS_RW, &c->flags)) { |
9ae28f82 | 249 | bch2_journal_reclaim_stop(&c->journal); |
1c6fdbd8 | 250 | return; |
134915f3 | 251 | } |
1c6fdbd8 KO |
252 | |
253 | BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
254 | ||
255 | /* | |
256 | * Block new foreground-end write operations from starting - any new | |
257 | * writes will return -EROFS: | |
1c6fdbd8 KO |
258 | */ |
259 | percpu_ref_kill(&c->writes); | |
260 | ||
f516c872 | 261 | cancel_work_sync(&c->ec_stripe_delete_work); |
1c6fdbd8 KO |
262 | |
263 | /* | |
264 | * If we're not doing an emergency shutdown, we want to wait on | |
265 | * outstanding writes to complete so they don't see spurious errors due | |
266 | * to shutting down the allocator: | |
267 | * | |
268 | * If we are doing an emergency shutdown outstanding writes may | |
269 | * hang until we shutdown the allocator so we don't want to wait | |
270 | * on outstanding writes before shutting everything down - but | |
271 | * we do need to wait on them before returning and signalling | |
272 | * that going RO is complete: | |
273 | */ | |
274 | wait_event(bch_read_only_wait, | |
275 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) || | |
276 | test_bit(BCH_FS_EMERGENCY_RO, &c->flags)); | |
277 | ||
278 | __bch2_fs_read_only(c); | |
279 | ||
280 | wait_event(bch_read_only_wait, | |
281 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
282 | ||
283 | clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
284 | ||
285 | if (!bch2_journal_error(&c->journal) && | |
286 | !test_bit(BCH_FS_ERROR, &c->flags) && | |
3aea4342 | 287 | !test_bit(BCH_FS_EMERGENCY_RO, &c->flags) && |
a0e0bda1 | 288 | test_bit(BCH_FS_STARTED, &c->flags) && |
c0960603 | 289 | test_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags) && |
b2930396 KO |
290 | !c->opts.norecovery) { |
291 | bch_verbose(c, "marking filesystem clean"); | |
134915f3 | 292 | bch2_fs_mark_clean(c); |
b2930396 | 293 | } |
1c6fdbd8 | 294 | |
134915f3 | 295 | clear_bit(BCH_FS_RW, &c->flags); |
1c6fdbd8 KO |
296 | } |
297 | ||
298 | static void bch2_fs_read_only_work(struct work_struct *work) | |
299 | { | |
300 | struct bch_fs *c = | |
301 | container_of(work, struct bch_fs, read_only_work); | |
302 | ||
1ada1606 | 303 | down_write(&c->state_lock); |
1c6fdbd8 | 304 | bch2_fs_read_only(c); |
1ada1606 | 305 | up_write(&c->state_lock); |
1c6fdbd8 KO |
306 | } |
307 | ||
308 | static void bch2_fs_read_only_async(struct bch_fs *c) | |
309 | { | |
310 | queue_work(system_long_wq, &c->read_only_work); | |
311 | } | |
312 | ||
313 | bool bch2_fs_emergency_read_only(struct bch_fs *c) | |
314 | { | |
315 | bool ret = !test_and_set_bit(BCH_FS_EMERGENCY_RO, &c->flags); | |
316 | ||
1c6fdbd8 | 317 | bch2_journal_halt(&c->journal); |
9f115ce9 | 318 | bch2_fs_read_only_async(c); |
1c6fdbd8 KO |
319 | |
320 | wake_up(&bch_read_only_wait); | |
321 | return ret; | |
322 | } | |
323 | ||
134915f3 | 324 | static int bch2_fs_read_write_late(struct bch_fs *c) |
1c6fdbd8 | 325 | { |
134915f3 | 326 | int ret; |
1c6fdbd8 | 327 | |
134915f3 KO |
328 | ret = bch2_gc_thread_start(c); |
329 | if (ret) { | |
330 | bch_err(c, "error starting gc thread"); | |
331 | return ret; | |
332 | } | |
333 | ||
e6d11615 KO |
334 | ret = bch2_copygc_start(c); |
335 | if (ret) { | |
336 | bch_err(c, "error starting copygc thread"); | |
337 | return ret; | |
134915f3 KO |
338 | } |
339 | ||
340 | ret = bch2_rebalance_start(c); | |
341 | if (ret) { | |
342 | bch_err(c, "error starting rebalance thread"); | |
343 | return ret; | |
344 | } | |
345 | ||
97fd13ad KO |
346 | schedule_work(&c->ec_stripe_delete_work); |
347 | ||
134915f3 KO |
348 | return 0; |
349 | } | |
1c6fdbd8 | 350 | |
e731d466 | 351 | static int __bch2_fs_read_write(struct bch_fs *c, bool early) |
134915f3 KO |
352 | { |
353 | struct bch_dev *ca; | |
354 | unsigned i; | |
355 | int ret; | |
356 | ||
aae15aaf KO |
357 | if (test_bit(BCH_FS_INITIAL_GC_UNFIXED, &c->flags)) { |
358 | bch_err(c, "cannot go rw, unfixed btree errors"); | |
359 | return -EROFS; | |
360 | } | |
361 | ||
134915f3 KO |
362 | if (test_bit(BCH_FS_RW, &c->flags)) |
363 | return 0; | |
364 | ||
619f5bee KO |
365 | /* |
366 | * nochanges is used for fsck -n mode - we have to allow going rw | |
367 | * during recovery for that to work: | |
368 | */ | |
369 | if (c->opts.norecovery || | |
370 | (c->opts.nochanges && | |
371 | (!early || c->opts.read_only))) | |
372 | return -EROFS; | |
330581f1 | 373 | |
2c944fa1 KO |
374 | bch_info(c, "going read-write"); |
375 | ||
134915f3 KO |
376 | ret = bch2_fs_mark_dirty(c); |
377 | if (ret) | |
378 | goto err; | |
1c6fdbd8 | 379 | |
c0960603 | 380 | clear_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags); |
2340fd9d | 381 | |
b9004e85 KO |
382 | /* |
383 | * First journal write must be a flush write: after a clean shutdown we | |
384 | * don't read the journal, so the first journal write may end up | |
385 | * overwriting whatever was there previously, and there must always be | |
386 | * at least one non-flush write in the journal or recovery will fail: | |
387 | */ | |
388 | set_bit(JOURNAL_NEED_FLUSH_WRITE, &c->journal.flags); | |
389 | ||
1c6fdbd8 KO |
390 | for_each_rw_member(ca, c, i) |
391 | bch2_dev_allocator_add(c, ca); | |
392 | bch2_recalc_capacity(c); | |
393 | ||
59cc38b8 | 394 | bch2_do_discards(c); |
0e96f5dc | 395 | bch2_do_invalidates(c); |
59cc38b8 | 396 | |
134915f3 KO |
397 | if (!early) { |
398 | ret = bch2_fs_read_write_late(c); | |
399 | if (ret) | |
400 | goto err; | |
401 | } | |
1c6fdbd8 | 402 | |
134915f3 KO |
403 | percpu_ref_reinit(&c->writes); |
404 | set_bit(BCH_FS_RW, &c->flags); | |
4932e07e | 405 | set_bit(BCH_FS_WAS_RW, &c->flags); |
134915f3 | 406 | return 0; |
1c6fdbd8 KO |
407 | err: |
408 | __bch2_fs_read_only(c); | |
134915f3 KO |
409 | return ret; |
410 | } | |
411 | ||
412 | int bch2_fs_read_write(struct bch_fs *c) | |
413 | { | |
414 | return __bch2_fs_read_write(c, false); | |
415 | } | |
416 | ||
417 | int bch2_fs_read_write_early(struct bch_fs *c) | |
418 | { | |
419 | lockdep_assert_held(&c->state_lock); | |
420 | ||
134915f3 | 421 | return __bch2_fs_read_write(c, true); |
1c6fdbd8 KO |
422 | } |
423 | ||
424 | /* Filesystem startup/shutdown: */ | |
425 | ||
d5e4dcc2 | 426 | static void __bch2_fs_free(struct bch_fs *c) |
1c6fdbd8 KO |
427 | { |
428 | unsigned i; | |
1a21bf98 | 429 | int cpu; |
1c6fdbd8 KO |
430 | |
431 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
432 | bch2_time_stats_exit(&c->times[i]); | |
433 | ||
104c6974 | 434 | bch2_fs_counters_exit(c); |
14b393ee | 435 | bch2_fs_snapshots_exit(c); |
1c6fdbd8 KO |
436 | bch2_fs_quota_exit(c); |
437 | bch2_fs_fsio_exit(c); | |
cd575ddf | 438 | bch2_fs_ec_exit(c); |
1c6fdbd8 KO |
439 | bch2_fs_encryption_exit(c); |
440 | bch2_fs_io_exit(c); | |
21aec962 | 441 | bch2_fs_buckets_waiting_for_journal_exit(c); |
c823c339 | 442 | bch2_fs_btree_interior_update_exit(c); |
36e9d698 | 443 | bch2_fs_btree_iter_exit(c); |
2ca88e5a | 444 | bch2_fs_btree_key_cache_exit(&c->btree_key_cache); |
1c6fdbd8 | 445 | bch2_fs_btree_cache_exit(c); |
9620c3ec | 446 | bch2_fs_replicas_exit(c); |
1c6fdbd8 KO |
447 | bch2_fs_journal_exit(&c->journal); |
448 | bch2_io_clock_exit(&c->io_clock[WRITE]); | |
449 | bch2_io_clock_exit(&c->io_clock[READ]); | |
450 | bch2_fs_compress_exit(c); | |
f1d786a0 | 451 | bch2_journal_keys_free(&c->journal_keys); |
ce6201c4 | 452 | bch2_journal_entries_free(c); |
9166b41d | 453 | percpu_free_rwsem(&c->mark_lock); |
5e82a9a1 | 454 | free_percpu(c->online_reserved); |
1a21bf98 | 455 | |
67e0dd8f | 456 | if (c->btree_paths_bufs) |
1a21bf98 | 457 | for_each_possible_cpu(cpu) |
67e0dd8f | 458 | kfree(per_cpu_ptr(c->btree_paths_bufs, cpu)->path); |
1a21bf98 | 459 | |
67e0dd8f | 460 | free_percpu(c->btree_paths_bufs); |
5663a415 | 461 | free_percpu(c->pcpu); |
35189e09 | 462 | mempool_exit(&c->large_bkey_pool); |
1c6fdbd8 KO |
463 | mempool_exit(&c->btree_bounce_pool); |
464 | bioset_exit(&c->btree_bio); | |
1c6fdbd8 KO |
465 | mempool_exit(&c->fill_iter); |
466 | percpu_ref_exit(&c->writes); | |
1c6fdbd8 | 467 | kfree(rcu_dereference_protected(c->disk_groups, 1)); |
1dd7f9d9 | 468 | kfree(c->journal_seq_blacklist_table); |
b5e8a699 | 469 | kfree(c->unused_inode_hints); |
e6d11615 | 470 | free_heap(&c->copygc_heap); |
1c6fdbd8 | 471 | |
3e3e02e6 KO |
472 | if (c->io_complete_wq) |
473 | destroy_workqueue(c->io_complete_wq); | |
1c6fdbd8 KO |
474 | if (c->copygc_wq) |
475 | destroy_workqueue(c->copygc_wq); | |
9f1833ca KO |
476 | if (c->btree_io_complete_wq) |
477 | destroy_workqueue(c->btree_io_complete_wq); | |
731bdd2e KO |
478 | if (c->btree_update_wq) |
479 | destroy_workqueue(c->btree_update_wq); | |
1c6fdbd8 | 480 | |
9d8022db | 481 | bch2_free_super(&c->disk_sb); |
1c6fdbd8 KO |
482 | kvpfree(c, sizeof(*c)); |
483 | module_put(THIS_MODULE); | |
484 | } | |
485 | ||
486 | static void bch2_fs_release(struct kobject *kobj) | |
487 | { | |
488 | struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); | |
489 | ||
d5e4dcc2 | 490 | __bch2_fs_free(c); |
1c6fdbd8 KO |
491 | } |
492 | ||
d5e4dcc2 | 493 | void __bch2_fs_stop(struct bch_fs *c) |
1c6fdbd8 KO |
494 | { |
495 | struct bch_dev *ca; | |
496 | unsigned i; | |
497 | ||
af1c6871 KO |
498 | bch_verbose(c, "shutting down"); |
499 | ||
1dd7f9d9 KO |
500 | set_bit(BCH_FS_STOPPING, &c->flags); |
501 | ||
9b6e2f1e KO |
502 | cancel_work_sync(&c->journal_seq_blacklist_gc_work); |
503 | ||
1ada1606 | 504 | down_write(&c->state_lock); |
883f1a7c | 505 | bch2_fs_read_only(c); |
1ada1606 | 506 | up_write(&c->state_lock); |
883f1a7c | 507 | |
1c6fdbd8 KO |
508 | for_each_member_device(ca, c, i) |
509 | if (ca->kobj.state_in_sysfs && | |
510 | ca->disk_sb.bdev) | |
511 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
512 | ||
513 | if (c->kobj.state_in_sysfs) | |
514 | kobject_del(&c->kobj); | |
515 | ||
516 | bch2_fs_debug_exit(c); | |
517 | bch2_fs_chardev_exit(c); | |
518 | ||
104c6974 | 519 | kobject_put(&c->counters_kobj); |
1c6fdbd8 KO |
520 | kobject_put(&c->time_stats); |
521 | kobject_put(&c->opts_dir); | |
522 | kobject_put(&c->internal); | |
523 | ||
1c6fdbd8 KO |
524 | /* btree prefetch might have kicked off reads in the background: */ |
525 | bch2_btree_flush_all_reads(c); | |
526 | ||
527 | for_each_member_device(ca, c, i) | |
528 | cancel_work_sync(&ca->io_error_work); | |
529 | ||
1c6fdbd8 | 530 | cancel_work_sync(&c->read_only_work); |
d5e4dcc2 KO |
531 | } |
532 | ||
533 | void bch2_fs_free(struct bch_fs *c) | |
534 | { | |
535 | unsigned i; | |
536 | ||
537 | mutex_lock(&bch_fs_list_lock); | |
538 | list_del(&c->list); | |
539 | mutex_unlock(&bch_fs_list_lock); | |
540 | ||
541 | closure_sync(&c->cl); | |
542 | closure_debug_destroy(&c->cl); | |
543 | ||
544 | for (i = 0; i < c->sb.nr_devices; i++) { | |
545 | struct bch_dev *ca = rcu_dereference_protected(c->devs[i], true); | |
1c6fdbd8 | 546 | |
d5e4dcc2 KO |
547 | if (ca) { |
548 | bch2_free_super(&ca->disk_sb); | |
549 | bch2_dev_free(ca); | |
550 | } | |
551 | } | |
1c6fdbd8 | 552 | |
af1c6871 KO |
553 | bch_verbose(c, "shutdown complete"); |
554 | ||
1c6fdbd8 KO |
555 | kobject_put(&c->kobj); |
556 | } | |
557 | ||
d5e4dcc2 KO |
558 | void bch2_fs_stop(struct bch_fs *c) |
559 | { | |
560 | __bch2_fs_stop(c); | |
561 | bch2_fs_free(c); | |
562 | } | |
563 | ||
e2b60560 | 564 | static int bch2_fs_online(struct bch_fs *c) |
1c6fdbd8 KO |
565 | { |
566 | struct bch_dev *ca; | |
1c6fdbd8 | 567 | unsigned i; |
e2b60560 | 568 | int ret = 0; |
1c6fdbd8 KO |
569 | |
570 | lockdep_assert_held(&bch_fs_list_lock); | |
571 | ||
e2b60560 KO |
572 | if (__bch2_uuid_to_fs(c->sb.uuid)) { |
573 | bch_err(c, "filesystem UUID already open"); | |
574 | return -EINVAL; | |
575 | } | |
1c6fdbd8 KO |
576 | |
577 | ret = bch2_fs_chardev_init(c); | |
e2b60560 KO |
578 | if (ret) { |
579 | bch_err(c, "error creating character device"); | |
580 | return ret; | |
581 | } | |
1c6fdbd8 KO |
582 | |
583 | bch2_fs_debug_init(c); | |
584 | ||
e2b60560 KO |
585 | ret = kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) ?: |
586 | kobject_add(&c->internal, &c->kobj, "internal") ?: | |
587 | kobject_add(&c->opts_dir, &c->kobj, "options") ?: | |
588 | kobject_add(&c->time_stats, &c->kobj, "time_stats") ?: | |
104c6974 | 589 | kobject_add(&c->counters_kobj, &c->kobj, "counters") ?: |
e2b60560 KO |
590 | bch2_opts_create_sysfs_files(&c->opts_dir); |
591 | if (ret) { | |
592 | bch_err(c, "error creating sysfs objects"); | |
593 | return ret; | |
594 | } | |
1c6fdbd8 | 595 | |
1ada1606 | 596 | down_write(&c->state_lock); |
1c6fdbd8 | 597 | |
e2b60560 KO |
598 | for_each_member_device(ca, c, i) { |
599 | ret = bch2_dev_sysfs_online(c, ca); | |
600 | if (ret) { | |
601 | bch_err(c, "error creating sysfs objects"); | |
3a402c8d | 602 | percpu_ref_put(&ca->ref); |
1c6fdbd8 | 603 | goto err; |
3a402c8d | 604 | } |
e2b60560 | 605 | } |
1c6fdbd8 | 606 | |
e2b60560 | 607 | BUG_ON(!list_empty(&c->list)); |
1c6fdbd8 | 608 | list_add(&c->list, &bch_fs_list); |
1c6fdbd8 | 609 | err: |
1ada1606 | 610 | up_write(&c->state_lock); |
e2b60560 | 611 | return ret; |
1c6fdbd8 KO |
612 | } |
613 | ||
614 | static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts) | |
615 | { | |
616 | struct bch_sb_field_members *mi; | |
617 | struct bch_fs *c; | |
401ec4db | 618 | struct printbuf name = PRINTBUF; |
ecf37a4a | 619 | unsigned i, iter_size; |
7be9ab63 | 620 | int ret = 0; |
1c6fdbd8 KO |
621 | |
622 | pr_verbose_init(opts, ""); | |
623 | ||
624 | c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO); | |
7be9ab63 CW |
625 | if (!c) { |
626 | c = ERR_PTR(-ENOMEM); | |
1c6fdbd8 | 627 | goto out; |
7be9ab63 | 628 | } |
1c6fdbd8 KO |
629 | |
630 | __module_get(THIS_MODULE); | |
631 | ||
505b7a4c KO |
632 | closure_init(&c->cl, NULL); |
633 | ||
634 | c->kobj.kset = bcachefs_kset; | |
635 | kobject_init(&c->kobj, &bch2_fs_ktype); | |
636 | kobject_init(&c->internal, &bch2_fs_internal_ktype); | |
637 | kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype); | |
638 | kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype); | |
104c6974 | 639 | kobject_init(&c->counters_kobj, &bch2_fs_counters_ktype); |
505b7a4c | 640 | |
1c6fdbd8 KO |
641 | c->minor = -1; |
642 | c->disk_sb.fs_sb = true; | |
643 | ||
1ada1606 | 644 | init_rwsem(&c->state_lock); |
1c6fdbd8 KO |
645 | mutex_init(&c->sb_lock); |
646 | mutex_init(&c->replicas_gc_lock); | |
647 | mutex_init(&c->btree_root_lock); | |
648 | INIT_WORK(&c->read_only_work, bch2_fs_read_only_work); | |
649 | ||
650 | init_rwsem(&c->gc_lock); | |
c45c8667 | 651 | mutex_init(&c->gc_gens_lock); |
1c6fdbd8 KO |
652 | |
653 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
654 | bch2_time_stats_init(&c->times[i]); | |
655 | ||
e6d11615 | 656 | bch2_fs_copygc_init(c); |
2ca88e5a | 657 | bch2_fs_btree_key_cache_init_early(&c->btree_key_cache); |
b092dadd KO |
658 | bch2_fs_allocator_background_init(c); |
659 | bch2_fs_allocator_foreground_init(c); | |
1c6fdbd8 KO |
660 | bch2_fs_rebalance_init(c); |
661 | bch2_fs_quota_init(c); | |
84c72755 | 662 | bch2_fs_ec_init_early(c); |
1c6fdbd8 KO |
663 | |
664 | INIT_LIST_HEAD(&c->list); | |
665 | ||
4d8100da KO |
666 | mutex_init(&c->usage_scratch_lock); |
667 | ||
1c6fdbd8 | 668 | mutex_init(&c->bio_bounce_pages_lock); |
14b393ee | 669 | mutex_init(&c->snapshot_table_lock); |
1c6fdbd8 | 670 | |
1c6fdbd8 | 671 | spin_lock_init(&c->btree_write_error_lock); |
1c6fdbd8 | 672 | |
9b6e2f1e KO |
673 | INIT_WORK(&c->journal_seq_blacklist_gc_work, |
674 | bch2_blacklist_entries_gc); | |
675 | ||
5b593ee1 | 676 | INIT_LIST_HEAD(&c->journal_iters); |
f1d786a0 | 677 | |
1c6fdbd8 KO |
678 | INIT_LIST_HEAD(&c->fsck_errors); |
679 | mutex_init(&c->fsck_error_lock); | |
680 | ||
703e2a43 KO |
681 | INIT_LIST_HEAD(&c->ec_stripe_head_list); |
682 | mutex_init(&c->ec_stripe_head_lock); | |
683 | ||
684 | INIT_LIST_HEAD(&c->ec_stripe_new_list); | |
685 | mutex_init(&c->ec_stripe_new_lock); | |
686 | ||
8dd6ed94 BH |
687 | INIT_LIST_HEAD(&c->data_progress_list); |
688 | mutex_init(&c->data_progress_lock); | |
689 | ||
cd575ddf KO |
690 | spin_lock_init(&c->ec_stripes_heap_lock); |
691 | ||
1c6fdbd8 KO |
692 | seqcount_init(&c->gc_pos_lock); |
693 | ||
5e82a9a1 KO |
694 | seqcount_init(&c->usage_lock); |
695 | ||
ef1b2092 KO |
696 | sema_init(&c->io_in_flight, 128); |
697 | ||
1c6fdbd8 KO |
698 | c->copy_gc_enabled = 1; |
699 | c->rebalance.enabled = 1; | |
700 | c->promote_whole_extents = true; | |
701 | ||
991ba021 KO |
702 | c->journal.flush_write_time = &c->times[BCH_TIME_journal_flush_write]; |
703 | c->journal.noflush_write_time = &c->times[BCH_TIME_journal_noflush_write]; | |
704 | c->journal.blocked_time = &c->times[BCH_TIME_blocked_journal]; | |
705 | c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq]; | |
1c6fdbd8 KO |
706 | |
707 | bch2_fs_btree_cache_init_early(&c->btree_cache); | |
708 | ||
fca1223c KO |
709 | mutex_init(&c->sectors_available_lock); |
710 | ||
e2b60560 KO |
711 | ret = percpu_init_rwsem(&c->mark_lock); |
712 | if (ret) | |
73e6ab95 KO |
713 | goto err; |
714 | ||
1c6fdbd8 | 715 | mutex_lock(&c->sb_lock); |
e2b60560 KO |
716 | ret = bch2_sb_to_fs(c, sb); |
717 | mutex_unlock(&c->sb_lock); | |
1c6fdbd8 | 718 | |
e2b60560 | 719 | if (ret) |
1c6fdbd8 | 720 | goto err; |
1c6fdbd8 | 721 | |
401ec4db | 722 | pr_uuid(&name, c->sb.user_uuid.b); |
3e3e02e6 | 723 | strscpy(c->name, name.buf, sizeof(c->name)); |
401ec4db KO |
724 | printbuf_exit(&name); |
725 | ||
726 | ret = name.allocation_failure ? -ENOMEM : 0; | |
727 | if (ret) | |
728 | goto err; | |
1c6fdbd8 | 729 | |
2430e72f KO |
730 | /* Compat: */ |
731 | if (sb->version <= bcachefs_metadata_version_inode_v2 && | |
732 | !BCH_SB_JOURNAL_FLUSH_DELAY(sb)) | |
733 | SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000); | |
734 | ||
735 | if (sb->version <= bcachefs_metadata_version_inode_v2 && | |
736 | !BCH_SB_JOURNAL_RECLAIM_DELAY(sb)) | |
737 | SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 100); | |
738 | ||
1c6fdbd8 | 739 | c->opts = bch2_opts_default; |
8244f320 KO |
740 | ret = bch2_opts_from_sb(&c->opts, sb); |
741 | if (ret) | |
742 | goto err; | |
743 | ||
1c6fdbd8 KO |
744 | bch2_opts_apply(&c->opts, opts); |
745 | ||
7c8f6f98 KO |
746 | c->btree_key_cache_btrees |= 1U << BTREE_ID_alloc; |
747 | if (c->opts.inodes_use_key_cache) | |
748 | c->btree_key_cache_btrees |= 1U << BTREE_ID_inodes; | |
749 | ||
8244f320 | 750 | c->block_bits = ilog2(block_sectors(c)); |
1c6fdbd8 KO |
751 | c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c); |
752 | ||
7be9ab63 | 753 | if (bch2_fs_init_fault("fs_alloc")) { |
e2b60560 KO |
754 | bch_err(c, "fs_alloc fault injected"); |
755 | ret = -EFAULT; | |
1c6fdbd8 | 756 | goto err; |
7be9ab63 | 757 | } |
1c6fdbd8 | 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 | ||
731bdd2e | 765 | if (!(c->btree_update_wq = alloc_workqueue("bcachefs", |
b17d3cec | 766 | WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512)) || |
9f1833ca | 767 | !(c->btree_io_complete_wq = alloc_workqueue("bcachefs_btree_io", |
9f2772c4 | 768 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) || |
2f33ece9 KO |
769 | !(c->copygc_wq = alloc_workqueue("bcachefs_copygc", |
770 | WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) || | |
731bdd2e KO |
771 | !(c->io_complete_wq = alloc_workqueue("bcachefs_io", |
772 | WQ_FREEZABLE|WQ_HIGHPRI|WQ_MEM_RECLAIM, 1)) || | |
134915f3 KO |
773 | percpu_ref_init(&c->writes, bch2_writes_disabled, |
774 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
1c6fdbd8 KO |
775 | mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) || |
776 | bioset_init(&c->btree_bio, 1, | |
777 | max(offsetof(struct btree_read_bio, bio), | |
778 | offsetof(struct btree_write_bio, wbio.bio)), | |
779 | BIOSET_NEED_BVECS) || | |
5663a415 | 780 | !(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) || |
5e82a9a1 | 781 | !(c->online_reserved = alloc_percpu(u64)) || |
67e0dd8f | 782 | !(c->btree_paths_bufs = alloc_percpu(struct btree_path_buf)) || |
1c6fdbd8 KO |
783 | mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1, |
784 | btree_bytes(c)) || | |
35189e09 | 785 | mempool_init_kmalloc_pool(&c->large_bkey_pool, 1, 2048) || |
b5e8a699 | 786 | !(c->unused_inode_hints = kcalloc(1U << c->inode_shard_bits, |
e2b60560 | 787 | sizeof(u64), GFP_KERNEL))) { |
7be9ab63 CW |
788 | ret = -ENOMEM; |
789 | goto err; | |
790 | } | |
791 | ||
f3b8403e KO |
792 | ret = bch2_fs_counters_init(c) ?: |
793 | bch2_io_clock_init(&c->io_clock[READ]) ?: | |
e2b60560 KO |
794 | bch2_io_clock_init(&c->io_clock[WRITE]) ?: |
795 | bch2_fs_journal_init(&c->journal) ?: | |
796 | bch2_fs_replicas_init(c) ?: | |
797 | bch2_fs_btree_cache_init(c) ?: | |
798 | bch2_fs_btree_key_cache_init(&c->btree_key_cache) ?: | |
799 | bch2_fs_btree_iter_init(c) ?: | |
800 | bch2_fs_btree_interior_update_init(c) ?: | |
9b688da3 | 801 | bch2_fs_buckets_waiting_for_journal_init(c) ?: |
e2b60560 KO |
802 | bch2_fs_subvolumes_init(c) ?: |
803 | bch2_fs_io_init(c) ?: | |
804 | bch2_fs_encryption_init(c) ?: | |
805 | bch2_fs_compress_init(c) ?: | |
806 | bch2_fs_ec_init(c) ?: | |
f3b8403e | 807 | bch2_fs_fsio_init(c); |
7be9ab63 | 808 | if (ret) |
1c6fdbd8 KO |
809 | goto err; |
810 | ||
811 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
812 | for (i = 0; i < c->sb.nr_devices; i++) | |
813 | if (bch2_dev_exists(c->disk_sb.sb, mi, i) && | |
7be9ab63 | 814 | bch2_dev_alloc(c, i)) { |
e2b60560 | 815 | ret = -EEXIST; |
1c6fdbd8 | 816 | goto err; |
7be9ab63 | 817 | } |
1c6fdbd8 | 818 | |
4b8f89af KO |
819 | bch2_journal_entry_res_resize(&c->journal, |
820 | &c->btree_root_journal_res, | |
821 | BTREE_ID_NR * (JSET_KEYS_U64s + BKEY_BTREE_PTR_U64s_MAX)); | |
822 | bch2_dev_usage_journal_reserve(c); | |
823 | bch2_journal_entry_res_resize(&c->journal, | |
824 | &c->clock_journal_res, | |
825 | (sizeof(struct jset_entry_clock) / sizeof(u64)) * 2); | |
826 | ||
1c6fdbd8 | 827 | mutex_lock(&bch_fs_list_lock); |
e2b60560 | 828 | ret = bch2_fs_online(c); |
1c6fdbd8 | 829 | mutex_unlock(&bch_fs_list_lock); |
e2b60560 KO |
830 | |
831 | if (ret) | |
1c6fdbd8 | 832 | goto err; |
1c6fdbd8 | 833 | out: |
7be9ab63 | 834 | pr_verbose_init(opts, "ret %i", PTR_ERR_OR_ZERO(c)); |
1c6fdbd8 KO |
835 | return c; |
836 | err: | |
837 | bch2_fs_free(c); | |
7be9ab63 | 838 | c = ERR_PTR(ret); |
1c6fdbd8 KO |
839 | goto out; |
840 | } | |
841 | ||
619f5bee KO |
842 | noinline_for_stack |
843 | static void print_mount_opts(struct bch_fs *c) | |
844 | { | |
845 | enum bch_opt_id i; | |
fa8e94fa | 846 | struct printbuf p = PRINTBUF; |
619f5bee KO |
847 | bool first = true; |
848 | ||
619f5bee | 849 | if (c->opts.read_only) { |
401ec4db | 850 | prt_printf(&p, "ro"); |
619f5bee KO |
851 | first = false; |
852 | } | |
853 | ||
854 | for (i = 0; i < bch2_opts_nr; i++) { | |
855 | const struct bch_option *opt = &bch2_opt_table[i]; | |
856 | u64 v = bch2_opt_get_by_id(&c->opts, i); | |
857 | ||
8244f320 | 858 | if (!(opt->flags & OPT_MOUNT)) |
619f5bee KO |
859 | continue; |
860 | ||
861 | if (v == bch2_opt_get_by_id(&bch2_opts_default, i)) | |
862 | continue; | |
863 | ||
864 | if (!first) | |
401ec4db | 865 | prt_printf(&p, ","); |
619f5bee | 866 | first = false; |
5521b1df | 867 | bch2_opt_to_text(&p, c, c->disk_sb.sb, opt, v, OPT_SHOW_MOUNT_STYLE); |
619f5bee KO |
868 | } |
869 | ||
fa8e94fa | 870 | if (!p.pos) |
401ec4db | 871 | prt_printf(&p, "(null)"); |
fa8e94fa | 872 | |
74b33393 | 873 | bch_info(c, "mounted version=%s opts=%s", bch2_metadata_versions[c->sb.version], p.buf); |
fa8e94fa | 874 | printbuf_exit(&p); |
619f5bee KO |
875 | } |
876 | ||
877 | int bch2_fs_start(struct bch_fs *c) | |
1c6fdbd8 | 878 | { |
1c6fdbd8 KO |
879 | struct bch_sb_field_members *mi; |
880 | struct bch_dev *ca; | |
a420eea6 | 881 | time64_t now = ktime_get_real_seconds(); |
1c6fdbd8 KO |
882 | unsigned i; |
883 | int ret = -EINVAL; | |
884 | ||
1ada1606 | 885 | down_write(&c->state_lock); |
1c6fdbd8 | 886 | |
134915f3 | 887 | BUG_ON(test_bit(BCH_FS_STARTED, &c->flags)); |
1c6fdbd8 KO |
888 | |
889 | mutex_lock(&c->sb_lock); | |
890 | ||
891 | for_each_online_member(ca, c, i) | |
892 | bch2_sb_from_fs(c, ca); | |
893 | ||
894 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
895 | for_each_online_member(ca, c, i) | |
896 | mi->members[ca->dev_idx].last_mount = cpu_to_le64(now); | |
897 | ||
898 | mutex_unlock(&c->sb_lock); | |
899 | ||
900 | for_each_rw_member(ca, c, i) | |
901 | bch2_dev_allocator_add(c, ca); | |
902 | bch2_recalc_capacity(c); | |
903 | ||
bf8f8b20 DH |
904 | for (i = 0; i < BCH_TRANSACTIONS_NR; i++) { |
905 | mutex_lock(&c->btree_transaction_stats[i].lock); | |
906 | bch2_time_stats_init(&c->btree_transaction_stats[i].lock_hold_times); | |
907 | mutex_unlock(&c->btree_transaction_stats[i].lock); | |
908 | } | |
909 | ||
1c6fdbd8 KO |
910 | ret = BCH_SB_INITIALIZED(c->disk_sb.sb) |
911 | ? bch2_fs_recovery(c) | |
912 | : bch2_fs_initialize(c); | |
913 | if (ret) | |
914 | goto err; | |
cd575ddf KO |
915 | |
916 | ret = bch2_opts_check_may_set(c); | |
917 | if (ret) | |
918 | goto err; | |
1c6fdbd8 | 919 | |
619f5bee | 920 | ret = -EINVAL; |
e2b60560 KO |
921 | if (bch2_fs_init_fault("fs_start")) { |
922 | bch_err(c, "fs_start fault injected"); | |
1c6fdbd8 | 923 | goto err; |
e2b60560 | 924 | } |
1c6fdbd8 | 925 | |
a9310ab0 KO |
926 | set_bit(BCH_FS_STARTED, &c->flags); |
927 | ||
619f5bee | 928 | if (c->opts.read_only || c->opts.nochanges) { |
1c6fdbd8 KO |
929 | bch2_fs_read_only(c); |
930 | } else { | |
619f5bee KO |
931 | ret = !test_bit(BCH_FS_RW, &c->flags) |
932 | ? bch2_fs_read_write(c) | |
933 | : bch2_fs_read_write_late(c); | |
934 | if (ret) | |
1c6fdbd8 KO |
935 | goto err; |
936 | } | |
937 | ||
619f5bee KO |
938 | print_mount_opts(c); |
939 | ret = 0; | |
1c6fdbd8 | 940 | out: |
1ada1606 | 941 | up_write(&c->state_lock); |
619f5bee | 942 | return ret; |
1c6fdbd8 | 943 | err: |
1ed0a5d2 | 944 | bch_err(c, "error starting filesystem: %s", bch2_err_str(ret)); |
1c6fdbd8 | 945 | |
1ed0a5d2 KO |
946 | if (ret < -BCH_ERR_START) |
947 | ret = -EINVAL; | |
1c6fdbd8 KO |
948 | goto out; |
949 | } | |
950 | ||
951 | static const char *bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c) | |
952 | { | |
953 | struct bch_sb_field_members *sb_mi; | |
954 | ||
955 | sb_mi = bch2_sb_get_members(sb); | |
956 | if (!sb_mi) | |
957 | return "Invalid superblock: member info area missing"; | |
958 | ||
8244f320 | 959 | if (le16_to_cpu(sb->block_size) != block_sectors(c)) |
1c6fdbd8 KO |
960 | return "mismatched block size"; |
961 | ||
962 | if (le16_to_cpu(sb_mi->members[sb->dev_idx].bucket_size) < | |
963 | BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb)) | |
964 | return "new cache bucket size is too small"; | |
965 | ||
966 | return NULL; | |
967 | } | |
968 | ||
969 | static const char *bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb) | |
970 | { | |
971 | struct bch_sb *newest = | |
972 | le64_to_cpu(fs->seq) > le64_to_cpu(sb->seq) ? fs : sb; | |
973 | struct bch_sb_field_members *mi = bch2_sb_get_members(newest); | |
974 | ||
975 | if (!uuid_equal(&fs->uuid, &sb->uuid)) | |
976 | return "device not a member of filesystem"; | |
977 | ||
978 | if (!bch2_dev_exists(newest, mi, sb->dev_idx)) | |
979 | return "device has been removed"; | |
980 | ||
981 | if (fs->block_size != sb->block_size) | |
982 | return "mismatched block size"; | |
983 | ||
984 | return NULL; | |
985 | } | |
986 | ||
987 | /* Device startup/shutdown: */ | |
988 | ||
989 | static void bch2_dev_release(struct kobject *kobj) | |
990 | { | |
991 | struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); | |
992 | ||
993 | kfree(ca); | |
994 | } | |
995 | ||
996 | static void bch2_dev_free(struct bch_dev *ca) | |
997 | { | |
998 | cancel_work_sync(&ca->io_error_work); | |
999 | ||
1000 | if (ca->kobj.state_in_sysfs && | |
1001 | ca->disk_sb.bdev) | |
1002 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1003 | ||
1004 | if (ca->kobj.state_in_sysfs) | |
1005 | kobject_del(&ca->kobj); | |
1006 | ||
1007 | bch2_free_super(&ca->disk_sb); | |
1008 | bch2_dev_journal_exit(ca); | |
1009 | ||
1010 | free_percpu(ca->io_done); | |
1011 | bioset_exit(&ca->replica_set); | |
1012 | bch2_dev_buckets_free(ca); | |
d1170ce5 | 1013 | free_page((unsigned long) ca->sb_read_scratch); |
1c6fdbd8 KO |
1014 | |
1015 | bch2_time_stats_exit(&ca->io_latency[WRITE]); | |
1016 | bch2_time_stats_exit(&ca->io_latency[READ]); | |
1017 | ||
1018 | percpu_ref_exit(&ca->io_ref); | |
1019 | percpu_ref_exit(&ca->ref); | |
1020 | kobject_put(&ca->kobj); | |
1021 | } | |
1022 | ||
1023 | static void __bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca) | |
1024 | { | |
1025 | ||
1026 | lockdep_assert_held(&c->state_lock); | |
1027 | ||
1028 | if (percpu_ref_is_zero(&ca->io_ref)) | |
1029 | return; | |
1030 | ||
1031 | __bch2_dev_read_only(c, ca); | |
1032 | ||
1033 | reinit_completion(&ca->io_ref_completion); | |
1034 | percpu_ref_kill(&ca->io_ref); | |
1035 | wait_for_completion(&ca->io_ref_completion); | |
1036 | ||
1037 | if (ca->kobj.state_in_sysfs) { | |
1038 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1039 | sysfs_remove_link(&ca->kobj, "block"); | |
1040 | } | |
1041 | ||
1042 | bch2_free_super(&ca->disk_sb); | |
1043 | bch2_dev_journal_exit(ca); | |
1044 | } | |
1045 | ||
1046 | static void bch2_dev_ref_complete(struct percpu_ref *ref) | |
1047 | { | |
1048 | struct bch_dev *ca = container_of(ref, struct bch_dev, ref); | |
1049 | ||
1050 | complete(&ca->ref_completion); | |
1051 | } | |
1052 | ||
1053 | static void bch2_dev_io_ref_complete(struct percpu_ref *ref) | |
1054 | { | |
1055 | struct bch_dev *ca = container_of(ref, struct bch_dev, io_ref); | |
1056 | ||
1057 | complete(&ca->io_ref_completion); | |
1058 | } | |
1059 | ||
1060 | static int bch2_dev_sysfs_online(struct bch_fs *c, struct bch_dev *ca) | |
1061 | { | |
1062 | int ret; | |
1063 | ||
1064 | if (!c->kobj.state_in_sysfs) | |
1065 | return 0; | |
1066 | ||
1067 | if (!ca->kobj.state_in_sysfs) { | |
1068 | ret = kobject_add(&ca->kobj, &c->kobj, | |
1069 | "dev-%u", ca->dev_idx); | |
1070 | if (ret) | |
1071 | return ret; | |
1072 | } | |
1073 | ||
1074 | if (ca->disk_sb.bdev) { | |
1075 | struct kobject *block = bdev_kobj(ca->disk_sb.bdev); | |
1076 | ||
1077 | ret = sysfs_create_link(block, &ca->kobj, "bcachefs"); | |
1078 | if (ret) | |
1079 | return ret; | |
1080 | ||
1081 | ret = sysfs_create_link(&ca->kobj, block, "block"); | |
1082 | if (ret) | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c, | |
1090 | struct bch_member *member) | |
1091 | { | |
1092 | struct bch_dev *ca; | |
1093 | ||
1094 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); | |
1095 | if (!ca) | |
1096 | return NULL; | |
1097 | ||
1098 | kobject_init(&ca->kobj, &bch2_dev_ktype); | |
1099 | init_completion(&ca->ref_completion); | |
1100 | init_completion(&ca->io_ref_completion); | |
1101 | ||
1102 | init_rwsem(&ca->bucket_lock); | |
1103 | ||
1c6fdbd8 KO |
1104 | INIT_WORK(&ca->io_error_work, bch2_io_error_work); |
1105 | ||
1106 | bch2_time_stats_init(&ca->io_latency[READ]); | |
1107 | bch2_time_stats_init(&ca->io_latency[WRITE]); | |
1108 | ||
1109 | ca->mi = bch2_mi_to_cpu(member); | |
1110 | ca->uuid = member->uuid; | |
1111 | ||
f25d8215 KO |
1112 | ca->nr_btree_reserve = DIV_ROUND_UP(BTREE_NODE_RESERVE, |
1113 | ca->mi.bucket_size / btree_sectors(c)); | |
1114 | ||
1c6fdbd8 KO |
1115 | if (percpu_ref_init(&ca->ref, bch2_dev_ref_complete, |
1116 | 0, GFP_KERNEL) || | |
1117 | percpu_ref_init(&ca->io_ref, bch2_dev_io_ref_complete, | |
1118 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d1170ce5 | 1119 | !(ca->sb_read_scratch = (void *) __get_free_page(GFP_KERNEL)) || |
1c6fdbd8 KO |
1120 | bch2_dev_buckets_alloc(c, ca) || |
1121 | bioset_init(&ca->replica_set, 4, | |
1122 | offsetof(struct bch_write_bio, bio), 0) || | |
1123 | !(ca->io_done = alloc_percpu(*ca->io_done))) | |
1124 | goto err; | |
1125 | ||
1126 | return ca; | |
1127 | err: | |
1128 | bch2_dev_free(ca); | |
1129 | return NULL; | |
1130 | } | |
1131 | ||
1132 | static void bch2_dev_attach(struct bch_fs *c, struct bch_dev *ca, | |
1133 | unsigned dev_idx) | |
1134 | { | |
1135 | ca->dev_idx = dev_idx; | |
1136 | __set_bit(ca->dev_idx, ca->self.d); | |
1137 | scnprintf(ca->name, sizeof(ca->name), "dev-%u", dev_idx); | |
1138 | ||
1139 | ca->fs = c; | |
1140 | rcu_assign_pointer(c->devs[ca->dev_idx], ca); | |
1141 | ||
1142 | if (bch2_dev_sysfs_online(c, ca)) | |
1143 | pr_warn("error creating sysfs objects"); | |
1144 | } | |
1145 | ||
1146 | static int bch2_dev_alloc(struct bch_fs *c, unsigned dev_idx) | |
1147 | { | |
1148 | struct bch_member *member = | |
1149 | bch2_sb_get_members(c->disk_sb.sb)->members + dev_idx; | |
1150 | struct bch_dev *ca = NULL; | |
1151 | int ret = 0; | |
1152 | ||
1153 | pr_verbose_init(c->opts, ""); | |
1154 | ||
1155 | if (bch2_fs_init_fault("dev_alloc")) | |
1156 | goto err; | |
1157 | ||
1158 | ca = __bch2_dev_alloc(c, member); | |
1159 | if (!ca) | |
1160 | goto err; | |
1161 | ||
220d2062 KO |
1162 | ca->fs = c; |
1163 | ||
1c6fdbd8 KO |
1164 | bch2_dev_attach(c, ca, dev_idx); |
1165 | out: | |
1166 | pr_verbose_init(c->opts, "ret %i", ret); | |
1167 | return ret; | |
1168 | err: | |
1169 | if (ca) | |
1170 | bch2_dev_free(ca); | |
1171 | ret = -ENOMEM; | |
1172 | goto out; | |
1173 | } | |
1174 | ||
1175 | static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb) | |
1176 | { | |
1177 | unsigned ret; | |
1178 | ||
1179 | if (bch2_dev_is_online(ca)) { | |
1180 | bch_err(ca, "already have device online in slot %u", | |
1181 | sb->sb->dev_idx); | |
1182 | return -EINVAL; | |
1183 | } | |
1184 | ||
1185 | if (get_capacity(sb->bdev->bd_disk) < | |
1186 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1187 | bch_err(ca, "cannot online: device too small"); | |
1188 | return -EINVAL; | |
1189 | } | |
1190 | ||
1191 | BUG_ON(!percpu_ref_is_zero(&ca->io_ref)); | |
1192 | ||
1193 | if (get_capacity(sb->bdev->bd_disk) < | |
1194 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1195 | bch_err(ca, "device too small"); | |
1196 | return -EINVAL; | |
1197 | } | |
1198 | ||
1199 | ret = bch2_dev_journal_init(ca, sb->sb); | |
1200 | if (ret) | |
1201 | return ret; | |
1202 | ||
1203 | /* Commit: */ | |
1204 | ca->disk_sb = *sb; | |
1205 | memset(sb, 0, sizeof(*sb)); | |
1206 | ||
eacb2574 KO |
1207 | ca->dev = ca->disk_sb.bdev->bd_dev; |
1208 | ||
1c6fdbd8 KO |
1209 | percpu_ref_reinit(&ca->io_ref); |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb) | |
1215 | { | |
1216 | struct bch_dev *ca; | |
1217 | int ret; | |
1218 | ||
1219 | lockdep_assert_held(&c->state_lock); | |
1220 | ||
1221 | if (le64_to_cpu(sb->sb->seq) > | |
1222 | le64_to_cpu(c->disk_sb.sb->seq)) | |
1223 | bch2_sb_to_fs(c, sb->sb); | |
1224 | ||
1225 | BUG_ON(sb->sb->dev_idx >= c->sb.nr_devices || | |
1226 | !c->devs[sb->sb->dev_idx]); | |
1227 | ||
1228 | ca = bch_dev_locked(c, sb->sb->dev_idx); | |
1229 | ||
1230 | ret = __bch2_dev_attach_bdev(ca, sb); | |
1231 | if (ret) | |
1232 | return ret; | |
1233 | ||
1234 | bch2_dev_sysfs_online(c, ca); | |
1235 | ||
1236 | if (c->sb.nr_devices == 1) | |
1237 | snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev); | |
1238 | snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev); | |
1239 | ||
1240 | rebalance_wakeup(c); | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | /* Device management: */ | |
1245 | ||
1246 | /* | |
1247 | * Note: this function is also used by the error paths - when a particular | |
1248 | * device sees an error, we call it to determine whether we can just set the | |
1249 | * device RO, or - if this function returns false - we'll set the whole | |
1250 | * filesystem RO: | |
1251 | * | |
1252 | * XXX: maybe we should be more explicit about whether we're changing state | |
1253 | * because we got an error or what have you? | |
1254 | */ | |
1255 | bool bch2_dev_state_allowed(struct bch_fs *c, struct bch_dev *ca, | |
1256 | enum bch_member_state new_state, int flags) | |
1257 | { | |
1258 | struct bch_devs_mask new_online_devs; | |
1c6fdbd8 KO |
1259 | struct bch_dev *ca2; |
1260 | int i, nr_rw = 0, required; | |
1261 | ||
1262 | lockdep_assert_held(&c->state_lock); | |
1263 | ||
1264 | switch (new_state) { | |
2436cb9f | 1265 | case BCH_MEMBER_STATE_rw: |
1c6fdbd8 | 1266 | return true; |
2436cb9f KO |
1267 | case BCH_MEMBER_STATE_ro: |
1268 | if (ca->mi.state != BCH_MEMBER_STATE_rw) | |
1c6fdbd8 KO |
1269 | return true; |
1270 | ||
1271 | /* do we have enough devices to write to? */ | |
1272 | for_each_member_device(ca2, c, i) | |
1273 | if (ca2 != ca) | |
2436cb9f | 1274 | nr_rw += ca2->mi.state == BCH_MEMBER_STATE_rw; |
1c6fdbd8 KO |
1275 | |
1276 | required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED) | |
1277 | ? c->opts.metadata_replicas | |
1278 | : c->opts.metadata_replicas_required, | |
1279 | !(flags & BCH_FORCE_IF_DATA_DEGRADED) | |
1280 | ? c->opts.data_replicas | |
1281 | : c->opts.data_replicas_required); | |
1282 | ||
1283 | return nr_rw >= required; | |
2436cb9f KO |
1284 | case BCH_MEMBER_STATE_failed: |
1285 | case BCH_MEMBER_STATE_spare: | |
1286 | if (ca->mi.state != BCH_MEMBER_STATE_rw && | |
1287 | ca->mi.state != BCH_MEMBER_STATE_ro) | |
1c6fdbd8 KO |
1288 | return true; |
1289 | ||
1290 | /* do we have enough devices to read from? */ | |
1291 | new_online_devs = bch2_online_devs(c); | |
1292 | __clear_bit(ca->dev_idx, new_online_devs.d); | |
1293 | ||
fcb3431b | 1294 | return bch2_have_enough_devs(c, new_online_devs, flags, false); |
1c6fdbd8 KO |
1295 | default: |
1296 | BUG(); | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | static bool bch2_fs_may_start(struct bch_fs *c) | |
1301 | { | |
1c6fdbd8 KO |
1302 | struct bch_sb_field_members *mi; |
1303 | struct bch_dev *ca; | |
fcb3431b KO |
1304 | unsigned i, flags = 0; |
1305 | ||
1306 | if (c->opts.very_degraded) | |
1307 | flags |= BCH_FORCE_IF_DEGRADED|BCH_FORCE_IF_LOST; | |
1c6fdbd8 | 1308 | |
fcb3431b KO |
1309 | if (c->opts.degraded) |
1310 | flags |= BCH_FORCE_IF_DEGRADED; | |
1311 | ||
1312 | if (!c->opts.degraded && | |
1313 | !c->opts.very_degraded) { | |
1c6fdbd8 KO |
1314 | mutex_lock(&c->sb_lock); |
1315 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1316 | ||
1317 | for (i = 0; i < c->disk_sb.sb->nr_devices; i++) { | |
1318 | if (!bch2_dev_exists(c->disk_sb.sb, mi, i)) | |
1319 | continue; | |
1320 | ||
1321 | ca = bch_dev_locked(c, i); | |
1322 | ||
1323 | if (!bch2_dev_is_online(ca) && | |
2436cb9f KO |
1324 | (ca->mi.state == BCH_MEMBER_STATE_rw || |
1325 | ca->mi.state == BCH_MEMBER_STATE_ro)) { | |
1c6fdbd8 KO |
1326 | mutex_unlock(&c->sb_lock); |
1327 | return false; | |
1328 | } | |
1329 | } | |
1330 | mutex_unlock(&c->sb_lock); | |
1331 | } | |
1332 | ||
fcb3431b | 1333 | return bch2_have_enough_devs(c, bch2_online_devs(c), flags, true); |
1c6fdbd8 KO |
1334 | } |
1335 | ||
1336 | static void __bch2_dev_read_only(struct bch_fs *c, struct bch_dev *ca) | |
1337 | { | |
74ed7e56 KO |
1338 | /* |
1339 | * Device going read only means the copygc reserve get smaller, so we | |
1340 | * don't want that happening while copygc is in progress: | |
1341 | */ | |
1342 | bch2_copygc_stop(c); | |
1343 | ||
1c6fdbd8 KO |
1344 | /* |
1345 | * The allocator thread itself allocates btree nodes, so stop it first: | |
1346 | */ | |
1c6fdbd8 KO |
1347 | bch2_dev_allocator_remove(c, ca); |
1348 | bch2_dev_journal_stop(&c->journal, ca); | |
74ed7e56 KO |
1349 | |
1350 | bch2_copygc_start(c); | |
1c6fdbd8 KO |
1351 | } |
1352 | ||
f25d8215 | 1353 | static void __bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca) |
1c6fdbd8 KO |
1354 | { |
1355 | lockdep_assert_held(&c->state_lock); | |
1356 | ||
2436cb9f | 1357 | BUG_ON(ca->mi.state != BCH_MEMBER_STATE_rw); |
1c6fdbd8 KO |
1358 | |
1359 | bch2_dev_allocator_add(c, ca); | |
1360 | bch2_recalc_capacity(c); | |
1c6fdbd8 KO |
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 | ||
2436cb9f | 1375 | if (new_state != BCH_MEMBER_STATE_rw) |
1c6fdbd8 KO |
1376 | __bch2_dev_read_only(c, ca); |
1377 | ||
2436cb9f | 1378 | bch_notice(ca, "%s", bch2_member_states[new_state]); |
1c6fdbd8 KO |
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 | ||
e2b60560 | 1386 | if (new_state == BCH_MEMBER_STATE_rw) |
f25d8215 | 1387 | __bch2_dev_read_write(c, ca); |
1c6fdbd8 KO |
1388 | |
1389 | rebalance_wakeup(c); | |
1390 | ||
1391 | return ret; | |
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 | int ret; | |
1398 | ||
1ada1606 | 1399 | down_write(&c->state_lock); |
1c6fdbd8 | 1400 | ret = __bch2_dev_set_state(c, ca, new_state, flags); |
1ada1606 | 1401 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1402 | |
1403 | return ret; | |
1404 | } | |
1405 | ||
1406 | /* Device add/removal: */ | |
1407 | ||
c0ebe3e4 | 1408 | static int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca) |
5d20ba48 | 1409 | { |
c6b2826c KO |
1410 | struct bpos start = POS(ca->dev_idx, 0); |
1411 | struct bpos end = POS(ca->dev_idx, U64_MAX); | |
5d20ba48 KO |
1412 | int ret; |
1413 | ||
a9c0a4cb KO |
1414 | /* |
1415 | * We clear the LRU and need_discard btrees first so that we don't race | |
1416 | * with bch2_do_invalidates() and bch2_do_discards() | |
1417 | */ | |
1418 | ret = bch2_btree_delete_range(c, BTREE_ID_lru, start, end, | |
1419 | BTREE_TRIGGER_NORUN, NULL) ?: | |
1420 | bch2_btree_delete_range(c, BTREE_ID_need_discard, start, end, | |
c6b2826c KO |
1421 | BTREE_TRIGGER_NORUN, NULL) ?: |
1422 | bch2_btree_delete_range(c, BTREE_ID_freespace, start, end, | |
1423 | BTREE_TRIGGER_NORUN, NULL) ?: | |
a9c0a4cb | 1424 | bch2_btree_delete_range(c, BTREE_ID_alloc, start, end, |
c6b2826c KO |
1425 | BTREE_TRIGGER_NORUN, NULL); |
1426 | if (ret) | |
d4bf5eec | 1427 | bch_err(c, "error removing dev alloc info: %s", bch2_err_str(ret)); |
5d20ba48 | 1428 | |
c6b2826c | 1429 | return ret; |
5d20ba48 KO |
1430 | } |
1431 | ||
1c6fdbd8 KO |
1432 | int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags) |
1433 | { | |
1434 | struct bch_sb_field_members *mi; | |
1435 | unsigned dev_idx = ca->dev_idx, data; | |
1436 | int ret = -EINVAL; | |
1437 | ||
1ada1606 | 1438 | down_write(&c->state_lock); |
1c6fdbd8 | 1439 | |
31ba2cd3 KO |
1440 | /* |
1441 | * We consume a reference to ca->ref, regardless of whether we succeed | |
1442 | * or fail: | |
1443 | */ | |
1444 | percpu_ref_put(&ca->ref); | |
1c6fdbd8 | 1445 | |
2436cb9f | 1446 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) { |
1c6fdbd8 KO |
1447 | bch_err(ca, "Cannot remove without losing data"); |
1448 | goto err; | |
1449 | } | |
1450 | ||
1451 | __bch2_dev_read_only(c, ca); | |
1452 | ||
1c6fdbd8 KO |
1453 | ret = bch2_dev_data_drop(c, ca->dev_idx, flags); |
1454 | if (ret) { | |
d4bf5eec | 1455 | bch_err(ca, "Remove failed: error dropping data: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
1456 | goto err; |
1457 | } | |
1458 | ||
a9c0a4cb | 1459 | ret = bch2_dev_remove_alloc(c, ca); |
1c6fdbd8 | 1460 | if (ret) { |
a9c0a4cb | 1461 | bch_err(ca, "Remove failed, error deleting alloc info"); |
1c6fdbd8 KO |
1462 | goto err; |
1463 | } | |
1464 | ||
a9c0a4cb | 1465 | ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx); |
1c6fdbd8 | 1466 | if (ret) { |
d4bf5eec | 1467 | bch_err(ca, "Remove failed: error flushing journal: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
1468 | goto err; |
1469 | } | |
1470 | ||
a9c0a4cb | 1471 | ret = bch2_journal_flush(&c->journal); |
1c6fdbd8 KO |
1472 | if (ret) { |
1473 | bch_err(ca, "Remove failed, journal error"); | |
1474 | goto err; | |
1475 | } | |
1476 | ||
31ba2cd3 KO |
1477 | ret = bch2_replicas_gc2(c); |
1478 | if (ret) { | |
d4bf5eec | 1479 | bch_err(ca, "Remove failed: error from replicas gc: %s", bch2_err_str(ret)); |
31ba2cd3 KO |
1480 | goto err; |
1481 | } | |
1482 | ||
1483 | data = bch2_dev_has_data(c, ca); | |
1484 | if (data) { | |
fa8e94fa | 1485 | struct printbuf data_has = PRINTBUF; |
31ba2cd3 | 1486 | |
401ec4db | 1487 | prt_bitflags(&data_has, bch2_data_types, data); |
fa8e94fa KO |
1488 | bch_err(ca, "Remove failed, still has data (%s)", data_has.buf); |
1489 | printbuf_exit(&data_has); | |
31ba2cd3 KO |
1490 | ret = -EBUSY; |
1491 | goto err; | |
1492 | } | |
1493 | ||
1c6fdbd8 KO |
1494 | __bch2_dev_offline(c, ca); |
1495 | ||
1496 | mutex_lock(&c->sb_lock); | |
1497 | rcu_assign_pointer(c->devs[ca->dev_idx], NULL); | |
1498 | mutex_unlock(&c->sb_lock); | |
1499 | ||
1500 | percpu_ref_kill(&ca->ref); | |
1501 | wait_for_completion(&ca->ref_completion); | |
1502 | ||
1503 | bch2_dev_free(ca); | |
1504 | ||
1505 | /* | |
1506 | * Free this device's slot in the bch_member array - all pointers to | |
1507 | * this device must be gone: | |
1508 | */ | |
1509 | mutex_lock(&c->sb_lock); | |
1510 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1511 | memset(&mi->members[dev_idx].uuid, 0, sizeof(mi->members[dev_idx].uuid)); | |
1512 | ||
1513 | bch2_write_super(c); | |
1514 | ||
1515 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1516 | up_write(&c->state_lock); |
180fb49d KO |
1517 | |
1518 | bch2_dev_usage_journal_reserve(c); | |
1c6fdbd8 KO |
1519 | return 0; |
1520 | err: | |
2436cb9f | 1521 | if (ca->mi.state == BCH_MEMBER_STATE_rw && |
d3bb629d | 1522 | !percpu_ref_is_zero(&ca->io_ref)) |
1c6fdbd8 | 1523 | __bch2_dev_read_write(c, ca); |
1ada1606 | 1524 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1525 | return ret; |
1526 | } | |
1527 | ||
1528 | /* Add new device to running filesystem: */ | |
1529 | int bch2_dev_add(struct bch_fs *c, const char *path) | |
1530 | { | |
1531 | struct bch_opts opts = bch2_opts_empty(); | |
1532 | struct bch_sb_handle sb; | |
1533 | const char *err; | |
1534 | struct bch_dev *ca = NULL; | |
1535 | struct bch_sb_field_members *mi; | |
1536 | struct bch_member dev_mi; | |
1537 | unsigned dev_idx, nr_devices, u64s; | |
fa8e94fa | 1538 | struct printbuf errbuf = PRINTBUF; |
02afcb8c | 1539 | struct printbuf label = PRINTBUF; |
1c6fdbd8 KO |
1540 | int ret; |
1541 | ||
1542 | ret = bch2_read_super(path, &opts, &sb); | |
e8536925 | 1543 | if (ret) { |
d4bf5eec | 1544 | bch_err(c, "device add error: error reading super: %s", bch2_err_str(ret)); |
efe68e1d | 1545 | goto err; |
e8536925 | 1546 | } |
1c6fdbd8 KO |
1547 | |
1548 | dev_mi = bch2_sb_get_members(sb.sb)->members[sb.sb->dev_idx]; | |
1549 | ||
02afcb8c KO |
1550 | if (BCH_MEMBER_GROUP(&dev_mi)) { |
1551 | bch2_disk_path_to_text(&label, sb.sb, BCH_MEMBER_GROUP(&dev_mi) - 1); | |
1552 | if (label.allocation_failure) { | |
1553 | ret = -ENOMEM; | |
1554 | goto err; | |
1555 | } | |
1556 | } | |
1557 | ||
1c6fdbd8 | 1558 | err = bch2_dev_may_add(sb.sb, c); |
e8536925 KO |
1559 | if (err) { |
1560 | bch_err(c, "device add error: %s", err); | |
efe68e1d KO |
1561 | ret = -EINVAL; |
1562 | goto err; | |
e8536925 | 1563 | } |
1c6fdbd8 KO |
1564 | |
1565 | ca = __bch2_dev_alloc(c, &dev_mi); | |
1566 | if (!ca) { | |
1567 | bch2_free_super(&sb); | |
efe68e1d KO |
1568 | ret = -ENOMEM; |
1569 | goto err; | |
1c6fdbd8 KO |
1570 | } |
1571 | ||
822835ff KO |
1572 | bch2_dev_usage_init(ca); |
1573 | ||
1c6fdbd8 KO |
1574 | ret = __bch2_dev_attach_bdev(ca, &sb); |
1575 | if (ret) { | |
1576 | bch2_dev_free(ca); | |
efe68e1d | 1577 | goto err; |
1c6fdbd8 KO |
1578 | } |
1579 | ||
1c6fdbd8 | 1580 | ret = bch2_dev_journal_alloc(ca); |
e8536925 KO |
1581 | if (ret) { |
1582 | bch_err(c, "device add error: journal alloc failed"); | |
1c6fdbd8 | 1583 | goto err; |
e8536925 | 1584 | } |
1c6fdbd8 | 1585 | |
1ada1606 | 1586 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1587 | mutex_lock(&c->sb_lock); |
1588 | ||
1c6fdbd8 | 1589 | ret = bch2_sb_from_fs(c, ca); |
e8536925 KO |
1590 | if (ret) { |
1591 | bch_err(c, "device add error: new device superblock too small"); | |
1c6fdbd8 | 1592 | goto err_unlock; |
e8536925 | 1593 | } |
1c6fdbd8 KO |
1594 | |
1595 | mi = bch2_sb_get_members(ca->disk_sb.sb); | |
1596 | ||
1597 | if (!bch2_sb_resize_members(&ca->disk_sb, | |
1598 | le32_to_cpu(mi->field.u64s) + | |
1599 | sizeof(dev_mi) / sizeof(u64))) { | |
e8536925 | 1600 | bch_err(c, "device add error: new device superblock too small"); |
098ef98d | 1601 | ret = -BCH_ERR_ENOSPC_sb_members; |
1c6fdbd8 KO |
1602 | goto err_unlock; |
1603 | } | |
1604 | ||
1605 | if (dynamic_fault("bcachefs:add:no_slot")) | |
1606 | goto no_slot; | |
1607 | ||
1608 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1609 | for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++) | |
1610 | if (!bch2_dev_exists(c->disk_sb.sb, mi, dev_idx)) | |
1611 | goto have_slot; | |
1612 | no_slot: | |
e8536925 | 1613 | bch_err(c, "device add error: already have maximum number of devices"); |
098ef98d | 1614 | ret = -BCH_ERR_ENOSPC_sb_members; |
1c6fdbd8 KO |
1615 | goto err_unlock; |
1616 | ||
1617 | have_slot: | |
1618 | nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices); | |
1619 | u64s = (sizeof(struct bch_sb_field_members) + | |
1620 | sizeof(struct bch_member) * nr_devices) / sizeof(u64); | |
1621 | ||
1c6fdbd8 | 1622 | mi = bch2_sb_resize_members(&c->disk_sb, u64s); |
e8536925 KO |
1623 | if (!mi) { |
1624 | bch_err(c, "device add error: no room in superblock for member info"); | |
098ef98d | 1625 | ret = -BCH_ERR_ENOSPC_sb_members; |
1c6fdbd8 | 1626 | goto err_unlock; |
e8536925 | 1627 | } |
1c6fdbd8 KO |
1628 | |
1629 | /* success: */ | |
1630 | ||
1631 | mi->members[dev_idx] = dev_mi; | |
a420eea6 | 1632 | mi->members[dev_idx].last_mount = cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1633 | c->disk_sb.sb->nr_devices = nr_devices; |
1634 | ||
1635 | ca->disk_sb.sb->dev_idx = dev_idx; | |
1636 | bch2_dev_attach(c, ca, dev_idx); | |
1637 | ||
02afcb8c KO |
1638 | if (BCH_MEMBER_GROUP(&dev_mi)) { |
1639 | ret = __bch2_dev_group_set(c, ca, label.buf); | |
1640 | if (ret) { | |
1641 | bch_err(c, "device add error: error setting label"); | |
1642 | goto err_unlock; | |
1643 | } | |
1644 | } | |
1645 | ||
1c6fdbd8 KO |
1646 | bch2_write_super(c); |
1647 | mutex_unlock(&c->sb_lock); | |
1648 | ||
180fb49d KO |
1649 | bch2_dev_usage_journal_reserve(c); |
1650 | ||
d62ab355 | 1651 | ret = bch2_trans_mark_dev_sb(c, ca); |
e8536925 | 1652 | if (ret) { |
d4bf5eec | 1653 | bch_err(c, "device add error: error marking new superblock: %s", bch2_err_str(ret)); |
bfcf840d | 1654 | goto err_late; |
e8536925 | 1655 | } |
8d6b6222 | 1656 | |
c6b2826c KO |
1657 | ret = bch2_fs_freespace_init(c); |
1658 | if (ret) { | |
d4bf5eec | 1659 | bch_err(c, "device add error: error initializing free space: %s", bch2_err_str(ret)); |
c6b2826c KO |
1660 | goto err_late; |
1661 | } | |
1662 | ||
09943313 KO |
1663 | ca->new_fs_bucket_idx = 0; |
1664 | ||
f25d8215 KO |
1665 | if (ca->mi.state == BCH_MEMBER_STATE_rw) |
1666 | __bch2_dev_read_write(c, ca); | |
1c6fdbd8 | 1667 | |
1ada1606 | 1668 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1669 | return 0; |
1670 | ||
1671 | err_unlock: | |
1672 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1673 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1674 | err: |
1675 | if (ca) | |
1676 | bch2_dev_free(ca); | |
1677 | bch2_free_super(&sb); | |
02afcb8c | 1678 | printbuf_exit(&label); |
fa8e94fa | 1679 | printbuf_exit(&errbuf); |
1c6fdbd8 KO |
1680 | return ret; |
1681 | err_late: | |
bfcf840d | 1682 | up_write(&c->state_lock); |
efe68e1d KO |
1683 | ca = NULL; |
1684 | goto err; | |
1c6fdbd8 KO |
1685 | } |
1686 | ||
1687 | /* Hot add existing device to running filesystem: */ | |
1688 | int bch2_dev_online(struct bch_fs *c, const char *path) | |
1689 | { | |
1690 | struct bch_opts opts = bch2_opts_empty(); | |
1691 | struct bch_sb_handle sb = { NULL }; | |
1692 | struct bch_sb_field_members *mi; | |
1693 | struct bch_dev *ca; | |
1694 | unsigned dev_idx; | |
1695 | const char *err; | |
1696 | int ret; | |
1697 | ||
1ada1606 | 1698 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1699 | |
1700 | ret = bch2_read_super(path, &opts, &sb); | |
1701 | if (ret) { | |
1ada1606 | 1702 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1703 | return ret; |
1704 | } | |
1705 | ||
1706 | dev_idx = sb.sb->dev_idx; | |
1707 | ||
1708 | err = bch2_dev_in_fs(c->disk_sb.sb, sb.sb); | |
e2b60560 KO |
1709 | if (err) { |
1710 | bch_err(c, "error bringing %s online: %s", path, err); | |
1c6fdbd8 | 1711 | goto err; |
e2b60560 | 1712 | } |
1c6fdbd8 | 1713 | |
e2b60560 KO |
1714 | ret = bch2_dev_attach_bdev(c, &sb); |
1715 | if (ret) | |
1c6fdbd8 | 1716 | goto err; |
1c6fdbd8 KO |
1717 | |
1718 | ca = bch_dev_locked(c, dev_idx); | |
bfcf840d | 1719 | |
e2b60560 KO |
1720 | ret = bch2_trans_mark_dev_sb(c, ca); |
1721 | if (ret) { | |
d4bf5eec KO |
1722 | bch_err(c, "error bringing %s online: error from bch2_trans_mark_dev_sb: %s", |
1723 | path, bch2_err_str(ret)); | |
bfcf840d KO |
1724 | goto err; |
1725 | } | |
1726 | ||
f25d8215 KO |
1727 | if (ca->mi.state == BCH_MEMBER_STATE_rw) |
1728 | __bch2_dev_read_write(c, ca); | |
1c6fdbd8 KO |
1729 | |
1730 | mutex_lock(&c->sb_lock); | |
1731 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1732 | ||
1733 | mi->members[ca->dev_idx].last_mount = | |
a420eea6 | 1734 | cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1735 | |
1736 | bch2_write_super(c); | |
1737 | mutex_unlock(&c->sb_lock); | |
1738 | ||
1ada1606 | 1739 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1740 | return 0; |
1741 | err: | |
1ada1606 | 1742 | up_write(&c->state_lock); |
1c6fdbd8 | 1743 | bch2_free_super(&sb); |
1c6fdbd8 KO |
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 | ||
2436cb9f | 1757 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) { |
1c6fdbd8 | 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) { | |
d4bf5eec | 1792 | bch_err(ca, "Resize error: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
1793 | goto err; |
1794 | } | |
1795 | ||
224ec3e6 | 1796 | ret = bch2_trans_mark_dev_sb(c, ca); |
3e3e02e6 | 1797 | if (ret) |
224ec3e6 | 1798 | goto err; |
224ec3e6 | 1799 | |
1c6fdbd8 KO |
1800 | mutex_lock(&c->sb_lock); |
1801 | mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx]; | |
1802 | mi->nbuckets = cpu_to_le64(nbuckets); | |
1803 | ||
1804 | bch2_write_super(c); | |
1805 | mutex_unlock(&c->sb_lock); | |
1806 | ||
1807 | bch2_recalc_capacity(c); | |
1808 | err: | |
1ada1606 | 1809 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1810 | return ret; |
1811 | } | |
1812 | ||
1813 | /* return with ref on ca->ref: */ | |
bf7e49a4 | 1814 | struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *name) |
1c6fdbd8 | 1815 | { |
1c6fdbd8 | 1816 | struct bch_dev *ca; |
1c6fdbd8 | 1817 | unsigned i; |
1c6fdbd8 | 1818 | |
3a402c8d KO |
1819 | rcu_read_lock(); |
1820 | for_each_member_device_rcu(ca, c, i, NULL) | |
bf7e49a4 | 1821 | if (!strcmp(name, ca->name)) |
1c6fdbd8 | 1822 | goto found; |
1c6fdbd8 KO |
1823 | ca = ERR_PTR(-ENOENT); |
1824 | found: | |
3a402c8d KO |
1825 | rcu_read_unlock(); |
1826 | ||
1c6fdbd8 KO |
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; | |
fa8e94fa | 1840 | struct printbuf errbuf = PRINTBUF; |
e2b60560 | 1841 | int ret = 0; |
1c6fdbd8 | 1842 | |
efe68e1d KO |
1843 | if (!try_module_get(THIS_MODULE)) |
1844 | return ERR_PTR(-ENODEV); | |
1845 | ||
1c6fdbd8 KO |
1846 | pr_verbose_init(opts, ""); |
1847 | ||
1848 | if (!nr_devices) { | |
efe68e1d KO |
1849 | ret = -EINVAL; |
1850 | goto err; | |
1c6fdbd8 KO |
1851 | } |
1852 | ||
1c6fdbd8 | 1853 | sb = kcalloc(nr_devices, sizeof(*sb), GFP_KERNEL); |
e2b60560 KO |
1854 | if (!sb) { |
1855 | ret = -ENOMEM; | |
1c6fdbd8 | 1856 | goto err; |
e2b60560 | 1857 | } |
1c6fdbd8 KO |
1858 | |
1859 | for (i = 0; i < nr_devices; i++) { | |
1860 | ret = bch2_read_super(devices[i], &opts, &sb[i]); | |
1861 | if (ret) | |
1862 | goto err; | |
1863 | ||
1c6fdbd8 KO |
1864 | } |
1865 | ||
1866 | for (i = 1; i < nr_devices; i++) | |
1867 | if (le64_to_cpu(sb[i].sb->seq) > | |
1868 | le64_to_cpu(sb[best_sb].sb->seq)) | |
1869 | best_sb = i; | |
1870 | ||
625104ea KO |
1871 | mi = bch2_sb_get_members(sb[best_sb].sb); |
1872 | ||
1873 | i = 0; | |
1874 | while (i < nr_devices) { | |
1875 | if (i != best_sb && | |
1876 | !bch2_dev_exists(sb[best_sb].sb, mi, sb[i].sb->dev_idx)) { | |
1877 | pr_info("%pg has been removed, skipping", sb[i].bdev); | |
1878 | bch2_free_super(&sb[i]); | |
1879 | array_remove_item(sb, nr_devices, i); | |
1880 | continue; | |
1881 | } | |
1882 | ||
1c6fdbd8 KO |
1883 | err = bch2_dev_in_fs(sb[best_sb].sb, sb[i].sb); |
1884 | if (err) | |
1885 | goto err_print; | |
625104ea | 1886 | i++; |
1c6fdbd8 KO |
1887 | } |
1888 | ||
1c6fdbd8 | 1889 | c = bch2_fs_alloc(sb[best_sb].sb, opts); |
7be9ab63 CW |
1890 | if (IS_ERR(c)) { |
1891 | ret = PTR_ERR(c); | |
1c6fdbd8 | 1892 | goto err; |
7be9ab63 | 1893 | } |
1c6fdbd8 | 1894 | |
1ada1606 | 1895 | down_write(&c->state_lock); |
e2b60560 KO |
1896 | for (i = 0; i < nr_devices; i++) { |
1897 | ret = bch2_dev_attach_bdev(c, &sb[i]); | |
1898 | if (ret) { | |
1ada1606 | 1899 | up_write(&c->state_lock); |
e2b60560 | 1900 | goto err; |
1c6fdbd8 | 1901 | } |
e2b60560 | 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); | |
fa8e94fa | 1916 | printbuf_exit(&errbuf); |
1c6fdbd8 | 1917 | module_put(THIS_MODULE); |
1c6fdbd8 KO |
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: | |
7be9ab63 | 1925 | if (!IS_ERR_OR_NULL(c)) |
1c6fdbd8 | 1926 | bch2_fs_stop(c); |
e2b60560 KO |
1927 | if (sb) |
1928 | for (i = 0; i < nr_devices; i++) | |
1929 | bch2_free_super(&sb[i]); | |
1c6fdbd8 KO |
1930 | c = ERR_PTR(ret); |
1931 | goto out; | |
1932 | } | |
1933 | ||
1c6fdbd8 KO |
1934 | /* Global interfaces/init */ |
1935 | ||
1936 | static void bcachefs_exit(void) | |
1937 | { | |
1938 | bch2_debug_exit(); | |
1939 | bch2_vfs_exit(); | |
1940 | bch2_chardev_exit(); | |
14ba3706 | 1941 | bch2_btree_key_cache_exit(); |
1c6fdbd8 KO |
1942 | if (bcachefs_kset) |
1943 | kset_unregister(bcachefs_kset); | |
1944 | } | |
1945 | ||
1946 | static int __init bcachefs_init(void) | |
1947 | { | |
1948 | bch2_bkey_pack_test(); | |
1c6fdbd8 KO |
1949 | |
1950 | if (!(bcachefs_kset = kset_create_and_add("bcachefs", NULL, fs_kobj)) || | |
14ba3706 | 1951 | bch2_btree_key_cache_init() || |
1c6fdbd8 KO |
1952 | bch2_chardev_init() || |
1953 | bch2_vfs_init() || | |
1954 | bch2_debug_init()) | |
1955 | goto err; | |
1956 | ||
1957 | return 0; | |
1958 | err: | |
1959 | bcachefs_exit(); | |
1960 | return -ENOMEM; | |
1961 | } | |
1962 | ||
1963 | #define BCH_DEBUG_PARAM(name, description) \ | |
1964 | bool bch2_##name; \ | |
1965 | module_param_named(name, bch2_##name, bool, 0644); \ | |
1966 | MODULE_PARM_DESC(name, description); | |
1967 | BCH_DEBUG_PARAMS() | |
1968 | #undef BCH_DEBUG_PARAM | |
1969 | ||
26609b61 | 1970 | unsigned bch2_metadata_version = bcachefs_metadata_version_current; |
1c6fdbd8 KO |
1971 | module_param_named(version, bch2_metadata_version, uint, 0400); |
1972 | ||
1973 | module_exit(bcachefs_exit); | |
1974 | module_init(bcachefs_init); |