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" | |
401585fe | 16 | #include "btree_journal_iter.h" |
2ca88e5a | 17 | #include "btree_key_cache.h" |
1c6fdbd8 KO |
18 | #include "btree_update_interior.h" |
19 | #include "btree_io.h" | |
920e69bc | 20 | #include "btree_write_buffer.h" |
21aec962 | 21 | #include "buckets_waiting_for_journal.h" |
1c6fdbd8 KO |
22 | #include "chardev.h" |
23 | #include "checksum.h" | |
24 | #include "clock.h" | |
25 | #include "compress.h" | |
104c6974 | 26 | #include "counters.h" |
1c6fdbd8 KO |
27 | #include "debug.h" |
28 | #include "disk_groups.h" | |
cd575ddf | 29 | #include "ec.h" |
d4bf5eec | 30 | #include "errcode.h" |
1c6fdbd8 KO |
31 | #include "error.h" |
32 | #include "fs.h" | |
33 | #include "fs-io.h" | |
dbbfca9f KO |
34 | #include "fs-io-buffered.h" |
35 | #include "fs-io-direct.h" | |
1c6fdbd8 KO |
36 | #include "fsck.h" |
37 | #include "inode.h" | |
1809b8cb KO |
38 | #include "io_read.h" |
39 | #include "io_write.h" | |
1c6fdbd8 KO |
40 | #include "journal.h" |
41 | #include "journal_reclaim.h" | |
1dd7f9d9 | 42 | #include "journal_seq_blacklist.h" |
1c6fdbd8 KO |
43 | #include "move.h" |
44 | #include "migrate.h" | |
45 | #include "movinggc.h" | |
350175bf | 46 | #include "nocow_locking.h" |
1c6fdbd8 KO |
47 | #include "quota.h" |
48 | #include "rebalance.h" | |
49 | #include "recovery.h" | |
50 | #include "replicas.h" | |
a37ad1a3 | 51 | #include "sb-clean.h" |
f5d26fa3 | 52 | #include "sb-errors.h" |
1241df58 | 53 | #include "sb-members.h" |
8e877caa | 54 | #include "snapshot.h" |
14b393ee | 55 | #include "subvolume.h" |
1c6fdbd8 KO |
56 | #include "super.h" |
57 | #include "super-io.h" | |
58 | #include "sysfs.h" | |
59 | #include "trace.h" | |
60 | ||
61 | #include <linux/backing-dev.h> | |
62 | #include <linux/blkdev.h> | |
63 | #include <linux/debugfs.h> | |
64 | #include <linux/device.h> | |
65 | #include <linux/idr.h> | |
1c6fdbd8 KO |
66 | #include <linux/module.h> |
67 | #include <linux/percpu.h> | |
68 | #include <linux/random.h> | |
69 | #include <linux/sysfs.h> | |
70 | #include <crypto/hash.h> | |
71 | ||
72 | MODULE_LICENSE("GPL"); | |
73 | MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>"); | |
a9737e0b | 74 | MODULE_DESCRIPTION("bcachefs filesystem"); |
85c6db98 DH |
75 | MODULE_SOFTDEP("pre: crc32c"); |
76 | MODULE_SOFTDEP("pre: crc64"); | |
77 | MODULE_SOFTDEP("pre: sha256"); | |
78 | MODULE_SOFTDEP("pre: chacha20"); | |
79 | MODULE_SOFTDEP("pre: poly1305"); | |
80 | MODULE_SOFTDEP("pre: xxhash"); | |
1c6fdbd8 | 81 | |
3c471b65 KO |
82 | const char * const bch2_fs_flag_strs[] = { |
83 | #define x(n) #n, | |
84 | BCH_FS_FLAGS() | |
85 | #undef x | |
86 | NULL | |
87 | }; | |
88 | ||
2b41226d KO |
89 | void __bch2_print(struct bch_fs *c, const char *fmt, ...) |
90 | { | |
91 | struct log_output *output = c->output; | |
92 | va_list args; | |
93 | ||
94 | if (c->output_filter && c->output_filter != current) | |
95 | output = NULL; | |
96 | ||
97 | va_start(args, fmt); | |
98 | if (likely(!output)) { | |
99 | vprintk(fmt, args); | |
100 | } else { | |
101 | unsigned long flags; | |
102 | ||
103 | if (fmt[0] == KERN_SOH[0]) | |
104 | fmt += 2; | |
105 | ||
106 | spin_lock_irqsave(&output->lock, flags); | |
107 | prt_vprintf(&output->buf, fmt, args); | |
108 | spin_unlock_irqrestore(&output->lock, flags); | |
109 | ||
110 | wake_up(&output->wait); | |
111 | } | |
112 | va_end(args); | |
113 | } | |
114 | ||
1c6fdbd8 KO |
115 | #define KTYPE(type) \ |
116 | static const struct attribute_group type ## _group = { \ | |
117 | .attrs = type ## _files \ | |
118 | }; \ | |
119 | \ | |
120 | static const struct attribute_group *type ## _groups[] = { \ | |
121 | &type ## _group, \ | |
122 | NULL \ | |
123 | }; \ | |
124 | \ | |
125 | static const struct kobj_type type ## _ktype = { \ | |
126 | .release = type ## _release, \ | |
127 | .sysfs_ops = &type ## _sysfs_ops, \ | |
128 | .default_groups = type ## _groups \ | |
129 | } | |
130 | ||
131 | static void bch2_fs_release(struct kobject *); | |
132 | static void bch2_dev_release(struct kobject *); | |
104c6974 DH |
133 | static void bch2_fs_counters_release(struct kobject *k) |
134 | { | |
135 | } | |
1c6fdbd8 KO |
136 | |
137 | static void bch2_fs_internal_release(struct kobject *k) | |
138 | { | |
139 | } | |
140 | ||
141 | static void bch2_fs_opts_dir_release(struct kobject *k) | |
142 | { | |
143 | } | |
144 | ||
145 | static void bch2_fs_time_stats_release(struct kobject *k) | |
146 | { | |
147 | } | |
148 | ||
149 | KTYPE(bch2_fs); | |
104c6974 | 150 | KTYPE(bch2_fs_counters); |
1c6fdbd8 KO |
151 | KTYPE(bch2_fs_internal); |
152 | KTYPE(bch2_fs_opts_dir); | |
153 | KTYPE(bch2_fs_time_stats); | |
154 | KTYPE(bch2_dev); | |
155 | ||
156 | static struct kset *bcachefs_kset; | |
157 | static LIST_HEAD(bch_fs_list); | |
158 | static DEFINE_MUTEX(bch_fs_list_lock); | |
159 | ||
d94189ad | 160 | DECLARE_WAIT_QUEUE_HEAD(bch2_read_only_wait); |
1c6fdbd8 KO |
161 | |
162 | static void bch2_dev_free(struct bch_dev *); | |
163 | static int bch2_dev_alloc(struct bch_fs *, unsigned); | |
164 | static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *); | |
165 | static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *); | |
166 | ||
167 | struct bch_fs *bch2_dev_to_fs(dev_t dev) | |
168 | { | |
169 | struct bch_fs *c; | |
170 | struct bch_dev *ca; | |
171 | unsigned i; | |
172 | ||
173 | mutex_lock(&bch_fs_list_lock); | |
174 | rcu_read_lock(); | |
175 | ||
176 | list_for_each_entry(c, &bch_fs_list, list) | |
177 | for_each_member_device_rcu(ca, c, i, NULL) | |
ec4ab9d2 | 178 | if (ca->disk_sb.bdev && ca->disk_sb.bdev->bd_dev == dev) { |
1c6fdbd8 KO |
179 | closure_get(&c->cl); |
180 | goto found; | |
181 | } | |
182 | c = NULL; | |
183 | found: | |
184 | rcu_read_unlock(); | |
185 | mutex_unlock(&bch_fs_list_lock); | |
186 | ||
187 | return c; | |
188 | } | |
189 | ||
190 | static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid) | |
191 | { | |
192 | struct bch_fs *c; | |
193 | ||
194 | lockdep_assert_held(&bch_fs_list_lock); | |
195 | ||
196 | list_for_each_entry(c, &bch_fs_list, list) | |
197 | if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid))) | |
198 | return c; | |
199 | ||
200 | return NULL; | |
201 | } | |
202 | ||
203 | struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid) | |
204 | { | |
205 | struct bch_fs *c; | |
206 | ||
207 | mutex_lock(&bch_fs_list_lock); | |
208 | c = __bch2_uuid_to_fs(uuid); | |
209 | if (c) | |
210 | closure_get(&c->cl); | |
211 | mutex_unlock(&bch_fs_list_lock); | |
212 | ||
213 | return c; | |
214 | } | |
215 | ||
180fb49d KO |
216 | static void bch2_dev_usage_journal_reserve(struct bch_fs *c) |
217 | { | |
218 | struct bch_dev *ca; | |
219 | unsigned i, nr = 0, u64s = | |
4b8f89af KO |
220 | ((sizeof(struct jset_entry_dev_usage) + |
221 | sizeof(struct jset_entry_dev_usage_type) * BCH_DATA_NR)) / | |
222 | sizeof(u64); | |
180fb49d KO |
223 | |
224 | rcu_read_lock(); | |
225 | for_each_member_device_rcu(ca, c, i, NULL) | |
226 | nr++; | |
227 | rcu_read_unlock(); | |
228 | ||
229 | bch2_journal_entry_res_resize(&c->journal, | |
230 | &c->dev_usage_journal_res, u64s * nr); | |
231 | } | |
232 | ||
1c6fdbd8 KO |
233 | /* Filesystem RO/RW: */ |
234 | ||
235 | /* | |
236 | * For startup/shutdown of RW stuff, the dependencies are: | |
237 | * | |
238 | * - foreground writes depend on copygc and rebalance (to free up space) | |
239 | * | |
240 | * - copygc and rebalance depend on mark and sweep gc (they actually probably | |
241 | * don't because they either reserve ahead of time or don't block if | |
242 | * allocations fail, but allocations can require mark and sweep gc to run | |
243 | * because of generation number wraparound) | |
244 | * | |
245 | * - all of the above depends on the allocator threads | |
246 | * | |
247 | * - allocator depends on the journal (when it rewrites prios and gens) | |
248 | */ | |
249 | ||
250 | static void __bch2_fs_read_only(struct bch_fs *c) | |
251 | { | |
252 | struct bch_dev *ca; | |
d5f70c1f | 253 | unsigned i, clean_passes = 0; |
c0960603 | 254 | u64 seq = 0; |
1c6fdbd8 | 255 | |
b40901b0 KO |
256 | bch2_fs_ec_stop(c); |
257 | bch2_open_buckets_stop(c, NULL, true); | |
1c6fdbd8 | 258 | bch2_rebalance_stop(c); |
e6d11615 | 259 | bch2_copygc_stop(c); |
1c6fdbd8 | 260 | bch2_gc_thread_stop(c); |
b40901b0 | 261 | bch2_fs_ec_flush(c); |
1c6fdbd8 | 262 | |
83ec519a KO |
263 | bch_verbose(c, "flushing journal and stopping allocators, journal seq %llu", |
264 | journal_cur_seq(&c->journal)); | |
460651ee | 265 | |
039fc4c5 KO |
266 | do { |
267 | clean_passes++; | |
430735cd | 268 | |
c0960603 KO |
269 | if (bch2_btree_interior_updates_flush(c) || |
270 | bch2_journal_flush_all_pins(&c->journal) || | |
271 | bch2_btree_flush_all_writes(c) || | |
272 | seq != atomic64_read(&c->journal.seq)) { | |
273 | seq = atomic64_read(&c->journal.seq); | |
039fc4c5 KO |
274 | clean_passes = 0; |
275 | } | |
d5f70c1f | 276 | } while (clean_passes < 2); |
2340fd9d | 277 | |
83ec519a KO |
278 | bch_verbose(c, "flushing journal and stopping allocators complete, journal seq %llu", |
279 | journal_cur_seq(&c->journal)); | |
00b8ccf7 | 280 | |
c0960603 | 281 | if (test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags) && |
3c471b65 KO |
282 | !test_bit(BCH_FS_emergency_ro, &c->flags)) |
283 | set_bit(BCH_FS_clean_shutdown, &c->flags); | |
1c6fdbd8 KO |
284 | bch2_fs_journal_stop(&c->journal); |
285 | ||
1c6fdbd8 KO |
286 | /* |
287 | * After stopping journal: | |
288 | */ | |
289 | for_each_member_device(ca, c, i) | |
290 | bch2_dev_allocator_remove(c, ca); | |
291 | } | |
292 | ||
d94189ad | 293 | #ifndef BCH_WRITE_REF_DEBUG |
1c6fdbd8 KO |
294 | static void bch2_writes_disabled(struct percpu_ref *writes) |
295 | { | |
296 | struct bch_fs *c = container_of(writes, struct bch_fs, writes); | |
297 | ||
3c471b65 | 298 | set_bit(BCH_FS_write_disable_complete, &c->flags); |
d94189ad | 299 | wake_up(&bch2_read_only_wait); |
1c6fdbd8 | 300 | } |
d94189ad | 301 | #endif |
1c6fdbd8 KO |
302 | |
303 | void bch2_fs_read_only(struct bch_fs *c) | |
304 | { | |
3c471b65 | 305 | if (!test_bit(BCH_FS_rw, &c->flags)) { |
9ae28f82 | 306 | bch2_journal_reclaim_stop(&c->journal); |
1c6fdbd8 | 307 | return; |
134915f3 | 308 | } |
1c6fdbd8 | 309 | |
3c471b65 | 310 | BUG_ON(test_bit(BCH_FS_write_disable_complete, &c->flags)); |
1c6fdbd8 | 311 | |
e7f7dded KO |
312 | bch_verbose(c, "going read-only"); |
313 | ||
1c6fdbd8 KO |
314 | /* |
315 | * Block new foreground-end write operations from starting - any new | |
316 | * writes will return -EROFS: | |
1c6fdbd8 | 317 | */ |
3c471b65 | 318 | set_bit(BCH_FS_going_ro, &c->flags); |
d94189ad | 319 | #ifndef BCH_WRITE_REF_DEBUG |
1c6fdbd8 | 320 | percpu_ref_kill(&c->writes); |
d94189ad KO |
321 | #else |
322 | for (unsigned i = 0; i < BCH_WRITE_REF_NR; i++) | |
323 | bch2_write_ref_put(c, i); | |
324 | #endif | |
1c6fdbd8 | 325 | |
1c6fdbd8 KO |
326 | /* |
327 | * If we're not doing an emergency shutdown, we want to wait on | |
328 | * outstanding writes to complete so they don't see spurious errors due | |
329 | * to shutting down the allocator: | |
330 | * | |
331 | * If we are doing an emergency shutdown outstanding writes may | |
332 | * hang until we shutdown the allocator so we don't want to wait | |
333 | * on outstanding writes before shutting everything down - but | |
334 | * we do need to wait on them before returning and signalling | |
335 | * that going RO is complete: | |
336 | */ | |
d94189ad | 337 | wait_event(bch2_read_only_wait, |
3c471b65 KO |
338 | test_bit(BCH_FS_write_disable_complete, &c->flags) || |
339 | test_bit(BCH_FS_emergency_ro, &c->flags)); | |
1c6fdbd8 | 340 | |
3c471b65 | 341 | bool writes_disabled = test_bit(BCH_FS_write_disable_complete, &c->flags); |
e7f7dded KO |
342 | if (writes_disabled) |
343 | bch_verbose(c, "finished waiting for writes to stop"); | |
344 | ||
1c6fdbd8 KO |
345 | __bch2_fs_read_only(c); |
346 | ||
d94189ad | 347 | wait_event(bch2_read_only_wait, |
3c471b65 | 348 | test_bit(BCH_FS_write_disable_complete, &c->flags)); |
1c6fdbd8 | 349 | |
e7f7dded KO |
350 | if (!writes_disabled) |
351 | bch_verbose(c, "finished waiting for writes to stop"); | |
352 | ||
3c471b65 KO |
353 | clear_bit(BCH_FS_write_disable_complete, &c->flags); |
354 | clear_bit(BCH_FS_going_ro, &c->flags); | |
355 | clear_bit(BCH_FS_rw, &c->flags); | |
1c6fdbd8 KO |
356 | |
357 | if (!bch2_journal_error(&c->journal) && | |
3c471b65 KO |
358 | !test_bit(BCH_FS_error, &c->flags) && |
359 | !test_bit(BCH_FS_emergency_ro, &c->flags) && | |
360 | test_bit(BCH_FS_started, &c->flags) && | |
361 | test_bit(BCH_FS_clean_shutdown, &c->flags) && | |
b2930396 | 362 | !c->opts.norecovery) { |
7724664f KO |
363 | BUG_ON(c->journal.last_empty_seq != journal_cur_seq(&c->journal)); |
364 | BUG_ON(atomic_read(&c->btree_cache.dirty)); | |
365 | BUG_ON(atomic_long_read(&c->btree_key_cache.nr_dirty)); | |
09caeabe KO |
366 | BUG_ON(c->btree_write_buffer.inc.keys.nr); |
367 | BUG_ON(c->btree_write_buffer.flushing.keys.nr); | |
7724664f | 368 | |
b2930396 | 369 | bch_verbose(c, "marking filesystem clean"); |
134915f3 | 370 | bch2_fs_mark_clean(c); |
e7f7dded KO |
371 | } else { |
372 | bch_verbose(c, "done going read-only, filesystem not clean"); | |
b2930396 | 373 | } |
1c6fdbd8 KO |
374 | } |
375 | ||
376 | static void bch2_fs_read_only_work(struct work_struct *work) | |
377 | { | |
378 | struct bch_fs *c = | |
379 | container_of(work, struct bch_fs, read_only_work); | |
380 | ||
1ada1606 | 381 | down_write(&c->state_lock); |
1c6fdbd8 | 382 | bch2_fs_read_only(c); |
1ada1606 | 383 | up_write(&c->state_lock); |
1c6fdbd8 KO |
384 | } |
385 | ||
386 | static void bch2_fs_read_only_async(struct bch_fs *c) | |
387 | { | |
388 | queue_work(system_long_wq, &c->read_only_work); | |
389 | } | |
390 | ||
391 | bool bch2_fs_emergency_read_only(struct bch_fs *c) | |
392 | { | |
3c471b65 | 393 | bool ret = !test_and_set_bit(BCH_FS_emergency_ro, &c->flags); |
1c6fdbd8 | 394 | |
1c6fdbd8 | 395 | bch2_journal_halt(&c->journal); |
9f115ce9 | 396 | bch2_fs_read_only_async(c); |
1c6fdbd8 | 397 | |
d94189ad | 398 | wake_up(&bch2_read_only_wait); |
1c6fdbd8 KO |
399 | return ret; |
400 | } | |
401 | ||
134915f3 | 402 | static int bch2_fs_read_write_late(struct bch_fs *c) |
1c6fdbd8 | 403 | { |
134915f3 | 404 | int ret; |
1c6fdbd8 | 405 | |
ea28c867 KO |
406 | /* |
407 | * Data move operations can't run until after check_snapshots has | |
408 | * completed, and bch2_snapshot_is_ancestor() is available. | |
409 | * | |
410 | * Ideally we'd start copygc/rebalance earlier instead of waiting for | |
411 | * all of recovery/fsck to complete: | |
412 | */ | |
413 | ret = bch2_copygc_start(c); | |
414 | if (ret) { | |
415 | bch_err(c, "error starting copygc thread"); | |
416 | return ret; | |
417 | } | |
418 | ||
134915f3 KO |
419 | ret = bch2_rebalance_start(c); |
420 | if (ret) { | |
421 | bch_err(c, "error starting rebalance thread"); | |
422 | return ret; | |
423 | } | |
424 | ||
134915f3 KO |
425 | return 0; |
426 | } | |
1c6fdbd8 | 427 | |
e731d466 | 428 | static int __bch2_fs_read_write(struct bch_fs *c, bool early) |
134915f3 KO |
429 | { |
430 | struct bch_dev *ca; | |
431 | unsigned i; | |
432 | int ret; | |
433 | ||
3c471b65 | 434 | if (test_bit(BCH_FS_initial_gc_unfixed, &c->flags)) { |
aae15aaf | 435 | bch_err(c, "cannot go rw, unfixed btree errors"); |
7c50140f | 436 | return -BCH_ERR_erofs_unfixed_errors; |
aae15aaf KO |
437 | } |
438 | ||
3c471b65 | 439 | if (test_bit(BCH_FS_rw, &c->flags)) |
134915f3 KO |
440 | return 0; |
441 | ||
7c50140f KO |
442 | if (c->opts.norecovery) |
443 | return -BCH_ERR_erofs_norecovery; | |
444 | ||
619f5bee KO |
445 | /* |
446 | * nochanges is used for fsck -n mode - we have to allow going rw | |
447 | * during recovery for that to work: | |
448 | */ | |
7c50140f KO |
449 | if (c->opts.nochanges && (!early || c->opts.read_only)) |
450 | return -BCH_ERR_erofs_nochanges; | |
330581f1 | 451 | |
2c944fa1 KO |
452 | bch_info(c, "going read-write"); |
453 | ||
f5d26fa3 | 454 | ret = bch2_sb_members_v2_init(c); |
3f7b9713 HS |
455 | if (ret) |
456 | goto err; | |
457 | ||
134915f3 KO |
458 | ret = bch2_fs_mark_dirty(c); |
459 | if (ret) | |
460 | goto err; | |
1c6fdbd8 | 461 | |
3c471b65 | 462 | clear_bit(BCH_FS_clean_shutdown, &c->flags); |
2340fd9d | 463 | |
b9004e85 KO |
464 | /* |
465 | * First journal write must be a flush write: after a clean shutdown we | |
466 | * don't read the journal, so the first journal write may end up | |
467 | * overwriting whatever was there previously, and there must always be | |
468 | * at least one non-flush write in the journal or recovery will fail: | |
469 | */ | |
470 | set_bit(JOURNAL_NEED_FLUSH_WRITE, &c->journal.flags); | |
471 | ||
1c6fdbd8 KO |
472 | for_each_rw_member(ca, c, i) |
473 | bch2_dev_allocator_add(c, ca); | |
474 | bch2_recalc_capacity(c); | |
475 | ||
3c471b65 KO |
476 | set_bit(BCH_FS_rw, &c->flags); |
477 | set_bit(BCH_FS_was_rw, &c->flags); | |
468035ca KO |
478 | |
479 | #ifndef BCH_WRITE_REF_DEBUG | |
480 | percpu_ref_reinit(&c->writes); | |
481 | #else | |
482 | for (i = 0; i < BCH_WRITE_REF_NR; i++) { | |
483 | BUG_ON(atomic_long_read(&c->writes[i])); | |
484 | atomic_long_inc(&c->writes[i]); | |
485 | } | |
486 | #endif | |
487 | ||
5f5c7466 KO |
488 | ret = bch2_gc_thread_start(c); |
489 | if (ret) { | |
490 | bch_err(c, "error starting gc thread"); | |
491 | return ret; | |
492 | } | |
493 | ||
197763a7 BF |
494 | ret = bch2_journal_reclaim_start(&c->journal); |
495 | if (ret) | |
496 | goto err; | |
497 | ||
134915f3 KO |
498 | if (!early) { |
499 | ret = bch2_fs_read_write_late(c); | |
500 | if (ret) | |
501 | goto err; | |
502 | } | |
1c6fdbd8 | 503 | |
dd81a060 KO |
504 | bch2_do_discards(c); |
505 | bch2_do_invalidates(c); | |
506 | bch2_do_stripe_deletes(c); | |
a1f26d70 | 507 | bch2_do_pending_node_rewrites(c); |
134915f3 | 508 | return 0; |
1c6fdbd8 | 509 | err: |
3c471b65 | 510 | if (test_bit(BCH_FS_rw, &c->flags)) |
468035ca KO |
511 | bch2_fs_read_only(c); |
512 | else | |
513 | __bch2_fs_read_only(c); | |
134915f3 KO |
514 | return ret; |
515 | } | |
516 | ||
517 | int bch2_fs_read_write(struct bch_fs *c) | |
518 | { | |
519 | return __bch2_fs_read_write(c, false); | |
520 | } | |
521 | ||
522 | int bch2_fs_read_write_early(struct bch_fs *c) | |
523 | { | |
524 | lockdep_assert_held(&c->state_lock); | |
525 | ||
134915f3 | 526 | return __bch2_fs_read_write(c, true); |
1c6fdbd8 KO |
527 | } |
528 | ||
529 | /* Filesystem startup/shutdown: */ | |
530 | ||
d5e4dcc2 | 531 | static void __bch2_fs_free(struct bch_fs *c) |
1c6fdbd8 KO |
532 | { |
533 | unsigned i; | |
534 | ||
535 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
536 | bch2_time_stats_exit(&c->times[i]); | |
537 | ||
a1f26d70 | 538 | bch2_free_pending_node_rewrites(c); |
f5d26fa3 | 539 | bch2_fs_sb_errors_exit(c); |
104c6974 | 540 | bch2_fs_counters_exit(c); |
14b393ee | 541 | bch2_fs_snapshots_exit(c); |
1c6fdbd8 | 542 | bch2_fs_quota_exit(c); |
dbbfca9f KO |
543 | bch2_fs_fs_io_direct_exit(c); |
544 | bch2_fs_fs_io_buffered_exit(c); | |
1c6fdbd8 | 545 | bch2_fs_fsio_exit(c); |
cd575ddf | 546 | bch2_fs_ec_exit(c); |
1c6fdbd8 | 547 | bch2_fs_encryption_exit(c); |
1e3b4098 | 548 | bch2_fs_nocow_locking_exit(c); |
1809b8cb KO |
549 | bch2_fs_io_write_exit(c); |
550 | bch2_fs_io_read_exit(c); | |
21aec962 | 551 | bch2_fs_buckets_waiting_for_journal_exit(c); |
c823c339 | 552 | bch2_fs_btree_interior_update_exit(c); |
36e9d698 | 553 | bch2_fs_btree_iter_exit(c); |
2ca88e5a | 554 | bch2_fs_btree_key_cache_exit(&c->btree_key_cache); |
1c6fdbd8 | 555 | bch2_fs_btree_cache_exit(c); |
9620c3ec | 556 | bch2_fs_replicas_exit(c); |
1c6fdbd8 KO |
557 | bch2_fs_journal_exit(&c->journal); |
558 | bch2_io_clock_exit(&c->io_clock[WRITE]); | |
559 | bch2_io_clock_exit(&c->io_clock[READ]); | |
560 | bch2_fs_compress_exit(c); | |
8a443d3e KO |
561 | bch2_journal_keys_put_initial(c); |
562 | BUG_ON(atomic_read(&c->journal_keys.ref)); | |
920e69bc | 563 | bch2_fs_btree_write_buffer_exit(c); |
9166b41d | 564 | percpu_free_rwsem(&c->mark_lock); |
5e82a9a1 | 565 | free_percpu(c->online_reserved); |
1a21bf98 | 566 | |
faa6cb6c | 567 | darray_exit(&c->btree_roots_extra); |
5663a415 | 568 | free_percpu(c->pcpu); |
35189e09 | 569 | mempool_exit(&c->large_bkey_pool); |
1c6fdbd8 KO |
570 | mempool_exit(&c->btree_bounce_pool); |
571 | bioset_exit(&c->btree_bio); | |
1c6fdbd8 | 572 | mempool_exit(&c->fill_iter); |
d94189ad | 573 | #ifndef BCH_WRITE_REF_DEBUG |
1c6fdbd8 | 574 | percpu_ref_exit(&c->writes); |
d94189ad | 575 | #endif |
1c6fdbd8 | 576 | kfree(rcu_dereference_protected(c->disk_groups, 1)); |
1dd7f9d9 | 577 | kfree(c->journal_seq_blacklist_table); |
b5e8a699 | 578 | kfree(c->unused_inode_hints); |
1c6fdbd8 | 579 | |
8bff9875 BF |
580 | if (c->write_ref_wq) |
581 | destroy_workqueue(c->write_ref_wq); | |
3e3e02e6 KO |
582 | if (c->io_complete_wq) |
583 | destroy_workqueue(c->io_complete_wq); | |
1c6fdbd8 KO |
584 | if (c->copygc_wq) |
585 | destroy_workqueue(c->copygc_wq); | |
9f1833ca KO |
586 | if (c->btree_io_complete_wq) |
587 | destroy_workqueue(c->btree_io_complete_wq); | |
731bdd2e KO |
588 | if (c->btree_update_wq) |
589 | destroy_workqueue(c->btree_update_wq); | |
1c6fdbd8 | 590 | |
9d8022db | 591 | bch2_free_super(&c->disk_sb); |
1c6fdbd8 KO |
592 | kvpfree(c, sizeof(*c)); |
593 | module_put(THIS_MODULE); | |
594 | } | |
595 | ||
596 | static void bch2_fs_release(struct kobject *kobj) | |
597 | { | |
598 | struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); | |
599 | ||
d5e4dcc2 | 600 | __bch2_fs_free(c); |
1c6fdbd8 KO |
601 | } |
602 | ||
d5e4dcc2 | 603 | void __bch2_fs_stop(struct bch_fs *c) |
1c6fdbd8 KO |
604 | { |
605 | struct bch_dev *ca; | |
606 | unsigned i; | |
607 | ||
af1c6871 KO |
608 | bch_verbose(c, "shutting down"); |
609 | ||
3c471b65 | 610 | set_bit(BCH_FS_stopping, &c->flags); |
1dd7f9d9 | 611 | |
9b6e2f1e KO |
612 | cancel_work_sync(&c->journal_seq_blacklist_gc_work); |
613 | ||
1ada1606 | 614 | down_write(&c->state_lock); |
883f1a7c | 615 | bch2_fs_read_only(c); |
1ada1606 | 616 | up_write(&c->state_lock); |
883f1a7c | 617 | |
1c6fdbd8 KO |
618 | for_each_member_device(ca, c, i) |
619 | if (ca->kobj.state_in_sysfs && | |
620 | ca->disk_sb.bdev) | |
621 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
622 | ||
623 | if (c->kobj.state_in_sysfs) | |
624 | kobject_del(&c->kobj); | |
625 | ||
626 | bch2_fs_debug_exit(c); | |
627 | bch2_fs_chardev_exit(c); | |
628 | ||
63508b75 KO |
629 | bch2_ro_ref_put(c); |
630 | wait_event(c->ro_ref_wait, !refcount_read(&c->ro_ref)); | |
631 | ||
104c6974 | 632 | kobject_put(&c->counters_kobj); |
1c6fdbd8 KO |
633 | kobject_put(&c->time_stats); |
634 | kobject_put(&c->opts_dir); | |
635 | kobject_put(&c->internal); | |
636 | ||
1c6fdbd8 KO |
637 | /* btree prefetch might have kicked off reads in the background: */ |
638 | bch2_btree_flush_all_reads(c); | |
639 | ||
640 | for_each_member_device(ca, c, i) | |
641 | cancel_work_sync(&ca->io_error_work); | |
642 | ||
1c6fdbd8 | 643 | cancel_work_sync(&c->read_only_work); |
d5e4dcc2 KO |
644 | } |
645 | ||
646 | void bch2_fs_free(struct bch_fs *c) | |
647 | { | |
648 | unsigned i; | |
649 | ||
650 | mutex_lock(&bch_fs_list_lock); | |
651 | list_del(&c->list); | |
652 | mutex_unlock(&bch_fs_list_lock); | |
653 | ||
654 | closure_sync(&c->cl); | |
655 | closure_debug_destroy(&c->cl); | |
656 | ||
657 | for (i = 0; i < c->sb.nr_devices; i++) { | |
658 | struct bch_dev *ca = rcu_dereference_protected(c->devs[i], true); | |
1c6fdbd8 | 659 | |
d5e4dcc2 KO |
660 | if (ca) { |
661 | bch2_free_super(&ca->disk_sb); | |
662 | bch2_dev_free(ca); | |
663 | } | |
664 | } | |
1c6fdbd8 | 665 | |
af1c6871 KO |
666 | bch_verbose(c, "shutdown complete"); |
667 | ||
1c6fdbd8 KO |
668 | kobject_put(&c->kobj); |
669 | } | |
670 | ||
d5e4dcc2 KO |
671 | void bch2_fs_stop(struct bch_fs *c) |
672 | { | |
673 | __bch2_fs_stop(c); | |
674 | bch2_fs_free(c); | |
675 | } | |
676 | ||
e2b60560 | 677 | static int bch2_fs_online(struct bch_fs *c) |
1c6fdbd8 KO |
678 | { |
679 | struct bch_dev *ca; | |
1c6fdbd8 | 680 | unsigned i; |
e2b60560 | 681 | int ret = 0; |
1c6fdbd8 KO |
682 | |
683 | lockdep_assert_held(&bch_fs_list_lock); | |
684 | ||
e2b60560 KO |
685 | if (__bch2_uuid_to_fs(c->sb.uuid)) { |
686 | bch_err(c, "filesystem UUID already open"); | |
687 | return -EINVAL; | |
688 | } | |
1c6fdbd8 KO |
689 | |
690 | ret = bch2_fs_chardev_init(c); | |
e2b60560 KO |
691 | if (ret) { |
692 | bch_err(c, "error creating character device"); | |
693 | return ret; | |
694 | } | |
1c6fdbd8 KO |
695 | |
696 | bch2_fs_debug_init(c); | |
697 | ||
e2b60560 KO |
698 | ret = kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) ?: |
699 | kobject_add(&c->internal, &c->kobj, "internal") ?: | |
700 | kobject_add(&c->opts_dir, &c->kobj, "options") ?: | |
066a2646 | 701 | #ifndef CONFIG_BCACHEFS_NO_LATENCY_ACCT |
e2b60560 | 702 | kobject_add(&c->time_stats, &c->kobj, "time_stats") ?: |
066a2646 | 703 | #endif |
104c6974 | 704 | kobject_add(&c->counters_kobj, &c->kobj, "counters") ?: |
e2b60560 KO |
705 | bch2_opts_create_sysfs_files(&c->opts_dir); |
706 | if (ret) { | |
707 | bch_err(c, "error creating sysfs objects"); | |
708 | return ret; | |
709 | } | |
1c6fdbd8 | 710 | |
1ada1606 | 711 | down_write(&c->state_lock); |
1c6fdbd8 | 712 | |
e2b60560 KO |
713 | for_each_member_device(ca, c, i) { |
714 | ret = bch2_dev_sysfs_online(c, ca); | |
715 | if (ret) { | |
716 | bch_err(c, "error creating sysfs objects"); | |
3a402c8d | 717 | percpu_ref_put(&ca->ref); |
1c6fdbd8 | 718 | goto err; |
3a402c8d | 719 | } |
e2b60560 | 720 | } |
1c6fdbd8 | 721 | |
e2b60560 | 722 | BUG_ON(!list_empty(&c->list)); |
1c6fdbd8 | 723 | list_add(&c->list, &bch_fs_list); |
1c6fdbd8 | 724 | err: |
1ada1606 | 725 | up_write(&c->state_lock); |
e2b60560 | 726 | return ret; |
1c6fdbd8 KO |
727 | } |
728 | ||
729 | static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts) | |
730 | { | |
1c6fdbd8 | 731 | struct bch_fs *c; |
401ec4db | 732 | struct printbuf name = PRINTBUF; |
ecf37a4a | 733 | unsigned i, iter_size; |
7be9ab63 | 734 | int ret = 0; |
1c6fdbd8 | 735 | |
1c6fdbd8 | 736 | c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO); |
7be9ab63 | 737 | if (!c) { |
65d48e35 | 738 | c = ERR_PTR(-BCH_ERR_ENOMEM_fs_alloc); |
1c6fdbd8 | 739 | goto out; |
7be9ab63 | 740 | } |
1c6fdbd8 | 741 | |
2b41226d KO |
742 | c->output = (void *)(unsigned long) opts.log_output; |
743 | ||
1c6fdbd8 KO |
744 | __module_get(THIS_MODULE); |
745 | ||
505b7a4c KO |
746 | closure_init(&c->cl, NULL); |
747 | ||
748 | c->kobj.kset = bcachefs_kset; | |
749 | kobject_init(&c->kobj, &bch2_fs_ktype); | |
750 | kobject_init(&c->internal, &bch2_fs_internal_ktype); | |
751 | kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype); | |
752 | kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype); | |
104c6974 | 753 | kobject_init(&c->counters_kobj, &bch2_fs_counters_ktype); |
505b7a4c | 754 | |
1c6fdbd8 KO |
755 | c->minor = -1; |
756 | c->disk_sb.fs_sb = true; | |
757 | ||
1ada1606 | 758 | init_rwsem(&c->state_lock); |
1c6fdbd8 KO |
759 | mutex_init(&c->sb_lock); |
760 | mutex_init(&c->replicas_gc_lock); | |
761 | mutex_init(&c->btree_root_lock); | |
762 | INIT_WORK(&c->read_only_work, bch2_fs_read_only_work); | |
763 | ||
63508b75 KO |
764 | refcount_set(&c->ro_ref, 1); |
765 | init_waitqueue_head(&c->ro_ref_wait); | |
267b801f | 766 | sema_init(&c->online_fsck_mutex, 1); |
63508b75 | 767 | |
1c6fdbd8 | 768 | init_rwsem(&c->gc_lock); |
c45c8667 | 769 | mutex_init(&c->gc_gens_lock); |
8a443d3e KO |
770 | atomic_set(&c->journal_keys.ref, 1); |
771 | c->journal_keys.initial_ref_held = true; | |
1c6fdbd8 KO |
772 | |
773 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
774 | bch2_time_stats_init(&c->times[i]); | |
775 | ||
e6d11615 | 776 | bch2_fs_copygc_init(c); |
2ca88e5a | 777 | bch2_fs_btree_key_cache_init_early(&c->btree_key_cache); |
50a8a732 | 778 | bch2_fs_btree_iter_init_early(c); |
65db6049 | 779 | bch2_fs_btree_interior_update_init_early(c); |
b092dadd KO |
780 | bch2_fs_allocator_background_init(c); |
781 | bch2_fs_allocator_foreground_init(c); | |
1c6fdbd8 KO |
782 | bch2_fs_rebalance_init(c); |
783 | bch2_fs_quota_init(c); | |
84c72755 | 784 | bch2_fs_ec_init_early(c); |
b9fa375b | 785 | bch2_fs_move_init(c); |
f5d26fa3 | 786 | bch2_fs_sb_errors_init_early(c); |
1c6fdbd8 KO |
787 | |
788 | INIT_LIST_HEAD(&c->list); | |
789 | ||
4d8100da KO |
790 | mutex_init(&c->usage_scratch_lock); |
791 | ||
1c6fdbd8 | 792 | mutex_init(&c->bio_bounce_pages_lock); |
14b393ee | 793 | mutex_init(&c->snapshot_table_lock); |
37fad949 | 794 | init_rwsem(&c->snapshot_create_lock); |
1c6fdbd8 | 795 | |
1c6fdbd8 | 796 | spin_lock_init(&c->btree_write_error_lock); |
1c6fdbd8 | 797 | |
9b6e2f1e KO |
798 | INIT_WORK(&c->journal_seq_blacklist_gc_work, |
799 | bch2_blacklist_entries_gc); | |
800 | ||
5b593ee1 | 801 | INIT_LIST_HEAD(&c->journal_iters); |
f1d786a0 | 802 | |
f5d26fa3 KO |
803 | INIT_LIST_HEAD(&c->fsck_error_msgs); |
804 | mutex_init(&c->fsck_error_msgs_lock); | |
1c6fdbd8 KO |
805 | |
806 | seqcount_init(&c->gc_pos_lock); | |
807 | ||
5e82a9a1 KO |
808 | seqcount_init(&c->usage_lock); |
809 | ||
ef1b2092 KO |
810 | sema_init(&c->io_in_flight, 128); |
811 | ||
9edbcc72 KO |
812 | INIT_LIST_HEAD(&c->vfs_inodes_list); |
813 | mutex_init(&c->vfs_inodes_lock); | |
814 | ||
1c6fdbd8 KO |
815 | c->copy_gc_enabled = 1; |
816 | c->rebalance.enabled = 1; | |
817 | c->promote_whole_extents = true; | |
818 | ||
991ba021 KO |
819 | c->journal.flush_write_time = &c->times[BCH_TIME_journal_flush_write]; |
820 | c->journal.noflush_write_time = &c->times[BCH_TIME_journal_noflush_write]; | |
991ba021 | 821 | c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq]; |
1c6fdbd8 KO |
822 | |
823 | bch2_fs_btree_cache_init_early(&c->btree_cache); | |
824 | ||
fca1223c KO |
825 | mutex_init(&c->sectors_available_lock); |
826 | ||
e2b60560 KO |
827 | ret = percpu_init_rwsem(&c->mark_lock); |
828 | if (ret) | |
73e6ab95 KO |
829 | goto err; |
830 | ||
1c6fdbd8 | 831 | mutex_lock(&c->sb_lock); |
e2b60560 KO |
832 | ret = bch2_sb_to_fs(c, sb); |
833 | mutex_unlock(&c->sb_lock); | |
1c6fdbd8 | 834 | |
e2b60560 | 835 | if (ret) |
1c6fdbd8 | 836 | goto err; |
1c6fdbd8 | 837 | |
401ec4db | 838 | pr_uuid(&name, c->sb.user_uuid.b); |
3e3e02e6 | 839 | strscpy(c->name, name.buf, sizeof(c->name)); |
401ec4db KO |
840 | printbuf_exit(&name); |
841 | ||
65d48e35 | 842 | ret = name.allocation_failure ? -BCH_ERR_ENOMEM_fs_name_alloc : 0; |
401ec4db KO |
843 | if (ret) |
844 | goto err; | |
1c6fdbd8 | 845 | |
2430e72f | 846 | /* Compat: */ |
73bd774d | 847 | if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_inode_v2 && |
2430e72f KO |
848 | !BCH_SB_JOURNAL_FLUSH_DELAY(sb)) |
849 | SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000); | |
850 | ||
73bd774d | 851 | if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_inode_v2 && |
2430e72f KO |
852 | !BCH_SB_JOURNAL_RECLAIM_DELAY(sb)) |
853 | SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 100); | |
854 | ||
1c6fdbd8 | 855 | c->opts = bch2_opts_default; |
8244f320 KO |
856 | ret = bch2_opts_from_sb(&c->opts, sb); |
857 | if (ret) | |
858 | goto err; | |
859 | ||
1c6fdbd8 KO |
860 | bch2_opts_apply(&c->opts, opts); |
861 | ||
7c8f6f98 KO |
862 | c->btree_key_cache_btrees |= 1U << BTREE_ID_alloc; |
863 | if (c->opts.inodes_use_key_cache) | |
864 | c->btree_key_cache_btrees |= 1U << BTREE_ID_inodes; | |
aaad530a | 865 | c->btree_key_cache_btrees |= 1U << BTREE_ID_logged_ops; |
7c8f6f98 | 866 | |
8244f320 | 867 | c->block_bits = ilog2(block_sectors(c)); |
1c6fdbd8 KO |
868 | c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c); |
869 | ||
7be9ab63 | 870 | if (bch2_fs_init_fault("fs_alloc")) { |
e2b60560 KO |
871 | bch_err(c, "fs_alloc fault injected"); |
872 | ret = -EFAULT; | |
1c6fdbd8 | 873 | goto err; |
7be9ab63 | 874 | } |
1c6fdbd8 | 875 | |
ae2f17d5 | 876 | iter_size = sizeof(struct sort_iter) + |
1c6fdbd8 | 877 | (btree_blocks(c) + 1) * 2 * |
ae2f17d5 | 878 | sizeof(struct sort_iter_set); |
1c6fdbd8 | 879 | |
b5e8a699 KO |
880 | c->inode_shard_bits = ilog2(roundup_pow_of_two(num_possible_cpus())); |
881 | ||
731bdd2e | 882 | if (!(c->btree_update_wq = alloc_workqueue("bcachefs", |
b17d3cec | 883 | WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512)) || |
9f1833ca | 884 | !(c->btree_io_complete_wq = alloc_workqueue("bcachefs_btree_io", |
9f2772c4 | 885 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) || |
2f33ece9 KO |
886 | !(c->copygc_wq = alloc_workqueue("bcachefs_copygc", |
887 | WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) || | |
731bdd2e KO |
888 | !(c->io_complete_wq = alloc_workqueue("bcachefs_io", |
889 | WQ_FREEZABLE|WQ_HIGHPRI|WQ_MEM_RECLAIM, 1)) || | |
8bff9875 BF |
890 | !(c->write_ref_wq = alloc_workqueue("bcachefs_write_ref", |
891 | WQ_FREEZABLE, 0)) || | |
d94189ad | 892 | #ifndef BCH_WRITE_REF_DEBUG |
134915f3 KO |
893 | percpu_ref_init(&c->writes, bch2_writes_disabled, |
894 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d94189ad | 895 | #endif |
1c6fdbd8 KO |
896 | mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) || |
897 | bioset_init(&c->btree_bio, 1, | |
898 | max(offsetof(struct btree_read_bio, bio), | |
899 | offsetof(struct btree_write_bio, wbio.bio)), | |
900 | BIOSET_NEED_BVECS) || | |
5663a415 | 901 | !(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) || |
5e82a9a1 | 902 | !(c->online_reserved = alloc_percpu(u64)) || |
1c6fdbd8 KO |
903 | mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1, |
904 | btree_bytes(c)) || | |
35189e09 | 905 | mempool_init_kmalloc_pool(&c->large_bkey_pool, 1, 2048) || |
b5e8a699 | 906 | !(c->unused_inode_hints = kcalloc(1U << c->inode_shard_bits, |
e2b60560 | 907 | sizeof(u64), GFP_KERNEL))) { |
65d48e35 | 908 | ret = -BCH_ERR_ENOMEM_fs_other_alloc; |
7be9ab63 CW |
909 | goto err; |
910 | } | |
911 | ||
f3b8403e | 912 | ret = bch2_fs_counters_init(c) ?: |
f5d26fa3 | 913 | bch2_fs_sb_errors_init(c) ?: |
f3b8403e | 914 | bch2_io_clock_init(&c->io_clock[READ]) ?: |
e2b60560 KO |
915 | bch2_io_clock_init(&c->io_clock[WRITE]) ?: |
916 | bch2_fs_journal_init(&c->journal) ?: | |
917 | bch2_fs_replicas_init(c) ?: | |
918 | bch2_fs_btree_cache_init(c) ?: | |
919 | bch2_fs_btree_key_cache_init(&c->btree_key_cache) ?: | |
920 | bch2_fs_btree_iter_init(c) ?: | |
921 | bch2_fs_btree_interior_update_init(c) ?: | |
9b688da3 | 922 | bch2_fs_buckets_waiting_for_journal_init(c) ?: |
920e69bc | 923 | bch2_fs_btree_write_buffer_init(c) ?: |
e2b60560 | 924 | bch2_fs_subvolumes_init(c) ?: |
1809b8cb KO |
925 | bch2_fs_io_read_init(c) ?: |
926 | bch2_fs_io_write_init(c) ?: | |
350175bf | 927 | bch2_fs_nocow_locking_init(c) ?: |
e2b60560 KO |
928 | bch2_fs_encryption_init(c) ?: |
929 | bch2_fs_compress_init(c) ?: | |
930 | bch2_fs_ec_init(c) ?: | |
dbbfca9f | 931 | bch2_fs_fsio_init(c) ?: |
867c1fe0 | 932 | bch2_fs_fs_io_buffered_init(c) ?: |
dbbfca9f | 933 | bch2_fs_fs_io_direct_init(c); |
7be9ab63 | 934 | if (ret) |
1c6fdbd8 KO |
935 | goto err; |
936 | ||
1c6fdbd8 | 937 | for (i = 0; i < c->sb.nr_devices; i++) |
1241df58 | 938 | if (bch2_dev_exists(c->disk_sb.sb, i) && |
7be9ab63 | 939 | bch2_dev_alloc(c, i)) { |
e2b60560 | 940 | ret = -EEXIST; |
1c6fdbd8 | 941 | goto err; |
7be9ab63 | 942 | } |
1c6fdbd8 | 943 | |
4b8f89af KO |
944 | bch2_journal_entry_res_resize(&c->journal, |
945 | &c->btree_root_journal_res, | |
946 | BTREE_ID_NR * (JSET_KEYS_U64s + BKEY_BTREE_PTR_U64s_MAX)); | |
947 | bch2_dev_usage_journal_reserve(c); | |
948 | bch2_journal_entry_res_resize(&c->journal, | |
949 | &c->clock_journal_res, | |
950 | (sizeof(struct jset_entry_clock) / sizeof(u64)) * 2); | |
951 | ||
1c6fdbd8 | 952 | mutex_lock(&bch_fs_list_lock); |
e2b60560 | 953 | ret = bch2_fs_online(c); |
1c6fdbd8 | 954 | mutex_unlock(&bch_fs_list_lock); |
e2b60560 KO |
955 | |
956 | if (ret) | |
1c6fdbd8 | 957 | goto err; |
1c6fdbd8 | 958 | out: |
1c6fdbd8 KO |
959 | return c; |
960 | err: | |
961 | bch2_fs_free(c); | |
7be9ab63 | 962 | c = ERR_PTR(ret); |
1c6fdbd8 KO |
963 | goto out; |
964 | } | |
965 | ||
619f5bee KO |
966 | noinline_for_stack |
967 | static void print_mount_opts(struct bch_fs *c) | |
968 | { | |
969 | enum bch_opt_id i; | |
fa8e94fa | 970 | struct printbuf p = PRINTBUF; |
619f5bee KO |
971 | bool first = true; |
972 | ||
ef1634f0 | 973 | prt_str(&p, "mounting version "); |
e3804b55 | 974 | bch2_version_to_text(&p, c->sb.version); |
60573ff5 | 975 | |
619f5bee | 976 | if (c->opts.read_only) { |
60573ff5 | 977 | prt_str(&p, " opts="); |
619f5bee | 978 | first = false; |
60573ff5 | 979 | prt_printf(&p, "ro"); |
619f5bee KO |
980 | } |
981 | ||
982 | for (i = 0; i < bch2_opts_nr; i++) { | |
983 | const struct bch_option *opt = &bch2_opt_table[i]; | |
984 | u64 v = bch2_opt_get_by_id(&c->opts, i); | |
985 | ||
8244f320 | 986 | if (!(opt->flags & OPT_MOUNT)) |
619f5bee KO |
987 | continue; |
988 | ||
989 | if (v == bch2_opt_get_by_id(&bch2_opts_default, i)) | |
990 | continue; | |
991 | ||
60573ff5 | 992 | prt_str(&p, first ? " opts=" : ","); |
619f5bee | 993 | first = false; |
5521b1df | 994 | bch2_opt_to_text(&p, c, c->disk_sb.sb, opt, v, OPT_SHOW_MOUNT_STYLE); |
619f5bee KO |
995 | } |
996 | ||
60573ff5 | 997 | bch_info(c, "%s", p.buf); |
fa8e94fa | 998 | printbuf_exit(&p); |
619f5bee KO |
999 | } |
1000 | ||
1001 | int bch2_fs_start(struct bch_fs *c) | |
1c6fdbd8 | 1002 | { |
1c6fdbd8 | 1003 | struct bch_dev *ca; |
a420eea6 | 1004 | time64_t now = ktime_get_real_seconds(); |
1c6fdbd8 | 1005 | unsigned i; |
78c0b75c | 1006 | int ret; |
1c6fdbd8 | 1007 | |
ef1634f0 KO |
1008 | print_mount_opts(c); |
1009 | ||
1ada1606 | 1010 | down_write(&c->state_lock); |
1c6fdbd8 | 1011 | |
3c471b65 | 1012 | BUG_ON(test_bit(BCH_FS_started, &c->flags)); |
1c6fdbd8 KO |
1013 | |
1014 | mutex_lock(&c->sb_lock); | |
1015 | ||
f5d26fa3 | 1016 | ret = bch2_sb_members_v2_init(c); |
3f7b9713 HS |
1017 | if (ret) { |
1018 | mutex_unlock(&c->sb_lock); | |
1019 | goto err; | |
1020 | } | |
1021 | ||
1c6fdbd8 | 1022 | for_each_online_member(ca, c, i) |
3f7b9713 | 1023 | bch2_members_v2_get_mut(c->disk_sb.sb, i)->last_mount = cpu_to_le64(now); |
1c6fdbd8 KO |
1024 | |
1025 | mutex_unlock(&c->sb_lock); | |
1026 | ||
1027 | for_each_rw_member(ca, c, i) | |
1028 | bch2_dev_allocator_add(c, ca); | |
1029 | bch2_recalc_capacity(c); | |
1030 | ||
1031 | ret = BCH_SB_INITIALIZED(c->disk_sb.sb) | |
1032 | ? bch2_fs_recovery(c) | |
1033 | : bch2_fs_initialize(c); | |
1034 | if (ret) | |
1035 | goto err; | |
cd575ddf KO |
1036 | |
1037 | ret = bch2_opts_check_may_set(c); | |
1038 | if (ret) | |
1039 | goto err; | |
1c6fdbd8 | 1040 | |
e2b60560 KO |
1041 | if (bch2_fs_init_fault("fs_start")) { |
1042 | bch_err(c, "fs_start fault injected"); | |
78c0b75c | 1043 | ret = -EINVAL; |
1c6fdbd8 | 1044 | goto err; |
e2b60560 | 1045 | } |
1c6fdbd8 | 1046 | |
3c471b65 | 1047 | set_bit(BCH_FS_started, &c->flags); |
a9310ab0 | 1048 | |
619f5bee | 1049 | if (c->opts.read_only || c->opts.nochanges) { |
1c6fdbd8 KO |
1050 | bch2_fs_read_only(c); |
1051 | } else { | |
3c471b65 | 1052 | ret = !test_bit(BCH_FS_rw, &c->flags) |
619f5bee KO |
1053 | ? bch2_fs_read_write(c) |
1054 | : bch2_fs_read_write_late(c); | |
1055 | if (ret) | |
1c6fdbd8 KO |
1056 | goto err; |
1057 | } | |
1058 | ||
619f5bee | 1059 | ret = 0; |
1c6fdbd8 | 1060 | out: |
1ada1606 | 1061 | up_write(&c->state_lock); |
619f5bee | 1062 | return ret; |
1c6fdbd8 | 1063 | err: |
e46c181a | 1064 | bch_err_msg(c, ret, "starting filesystem"); |
1c6fdbd8 KO |
1065 | goto out; |
1066 | } | |
1067 | ||
78c0b75c | 1068 | static int bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c) |
1c6fdbd8 | 1069 | { |
1241df58 | 1070 | struct bch_member m = bch2_sb_member_get(sb, sb->dev_idx); |
1c6fdbd8 | 1071 | |
8244f320 | 1072 | if (le16_to_cpu(sb->block_size) != block_sectors(c)) |
78c0b75c | 1073 | return -BCH_ERR_mismatched_block_size; |
1c6fdbd8 | 1074 | |
1241df58 | 1075 | if (le16_to_cpu(m.bucket_size) < |
1c6fdbd8 | 1076 | BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb)) |
78c0b75c | 1077 | return -BCH_ERR_bucket_size_too_small; |
1c6fdbd8 | 1078 | |
78c0b75c | 1079 | return 0; |
1c6fdbd8 KO |
1080 | } |
1081 | ||
78c0b75c | 1082 | static int bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb) |
1c6fdbd8 KO |
1083 | { |
1084 | struct bch_sb *newest = | |
1085 | le64_to_cpu(fs->seq) > le64_to_cpu(sb->seq) ? fs : sb; | |
1c6fdbd8 KO |
1086 | |
1087 | if (!uuid_equal(&fs->uuid, &sb->uuid)) | |
78c0b75c | 1088 | return -BCH_ERR_device_not_a_member_of_filesystem; |
1c6fdbd8 | 1089 | |
1241df58 | 1090 | if (!bch2_dev_exists(newest, sb->dev_idx)) |
78c0b75c | 1091 | return -BCH_ERR_device_has_been_removed; |
1c6fdbd8 KO |
1092 | |
1093 | if (fs->block_size != sb->block_size) | |
78c0b75c | 1094 | return -BCH_ERR_mismatched_block_size; |
1c6fdbd8 | 1095 | |
78c0b75c | 1096 | return 0; |
1c6fdbd8 KO |
1097 | } |
1098 | ||
1099 | /* Device startup/shutdown: */ | |
1100 | ||
1101 | static void bch2_dev_release(struct kobject *kobj) | |
1102 | { | |
1103 | struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); | |
1104 | ||
1105 | kfree(ca); | |
1106 | } | |
1107 | ||
1108 | static void bch2_dev_free(struct bch_dev *ca) | |
1109 | { | |
1110 | cancel_work_sync(&ca->io_error_work); | |
1111 | ||
1112 | if (ca->kobj.state_in_sysfs && | |
1113 | ca->disk_sb.bdev) | |
1114 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1115 | ||
1116 | if (ca->kobj.state_in_sysfs) | |
1117 | kobject_del(&ca->kobj); | |
1118 | ||
1119 | bch2_free_super(&ca->disk_sb); | |
1120 | bch2_dev_journal_exit(ca); | |
1121 | ||
1122 | free_percpu(ca->io_done); | |
1123 | bioset_exit(&ca->replica_set); | |
1124 | bch2_dev_buckets_free(ca); | |
d1170ce5 | 1125 | free_page((unsigned long) ca->sb_read_scratch); |
1c6fdbd8 KO |
1126 | |
1127 | bch2_time_stats_exit(&ca->io_latency[WRITE]); | |
1128 | bch2_time_stats_exit(&ca->io_latency[READ]); | |
1129 | ||
1130 | percpu_ref_exit(&ca->io_ref); | |
1131 | percpu_ref_exit(&ca->ref); | |
1132 | kobject_put(&ca->kobj); | |
1133 | } | |
1134 | ||
1135 | static void __bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca) | |
1136 | { | |
1137 | ||
1138 | lockdep_assert_held(&c->state_lock); | |
1139 | ||
1140 | if (percpu_ref_is_zero(&ca->io_ref)) | |
1141 | return; | |
1142 | ||
1143 | __bch2_dev_read_only(c, ca); | |
1144 | ||
1145 | reinit_completion(&ca->io_ref_completion); | |
1146 | percpu_ref_kill(&ca->io_ref); | |
1147 | wait_for_completion(&ca->io_ref_completion); | |
1148 | ||
1149 | if (ca->kobj.state_in_sysfs) { | |
1150 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1151 | sysfs_remove_link(&ca->kobj, "block"); | |
1152 | } | |
1153 | ||
1154 | bch2_free_super(&ca->disk_sb); | |
1155 | bch2_dev_journal_exit(ca); | |
1156 | } | |
1157 | ||
1158 | static void bch2_dev_ref_complete(struct percpu_ref *ref) | |
1159 | { | |
1160 | struct bch_dev *ca = container_of(ref, struct bch_dev, ref); | |
1161 | ||
1162 | complete(&ca->ref_completion); | |
1163 | } | |
1164 | ||
1165 | static void bch2_dev_io_ref_complete(struct percpu_ref *ref) | |
1166 | { | |
1167 | struct bch_dev *ca = container_of(ref, struct bch_dev, io_ref); | |
1168 | ||
1169 | complete(&ca->io_ref_completion); | |
1170 | } | |
1171 | ||
1172 | static int bch2_dev_sysfs_online(struct bch_fs *c, struct bch_dev *ca) | |
1173 | { | |
1174 | int ret; | |
1175 | ||
1176 | if (!c->kobj.state_in_sysfs) | |
1177 | return 0; | |
1178 | ||
1179 | if (!ca->kobj.state_in_sysfs) { | |
1180 | ret = kobject_add(&ca->kobj, &c->kobj, | |
1181 | "dev-%u", ca->dev_idx); | |
1182 | if (ret) | |
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | if (ca->disk_sb.bdev) { | |
1187 | struct kobject *block = bdev_kobj(ca->disk_sb.bdev); | |
1188 | ||
1189 | ret = sysfs_create_link(block, &ca->kobj, "bcachefs"); | |
1190 | if (ret) | |
1191 | return ret; | |
1192 | ||
1193 | ret = sysfs_create_link(&ca->kobj, block, "block"); | |
1194 | if (ret) | |
1195 | return ret; | |
1196 | } | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c, | |
1202 | struct bch_member *member) | |
1203 | { | |
1204 | struct bch_dev *ca; | |
94119eeb | 1205 | unsigned i; |
1c6fdbd8 KO |
1206 | |
1207 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); | |
1208 | if (!ca) | |
1209 | return NULL; | |
1210 | ||
1211 | kobject_init(&ca->kobj, &bch2_dev_ktype); | |
1212 | init_completion(&ca->ref_completion); | |
1213 | init_completion(&ca->io_ref_completion); | |
1214 | ||
1215 | init_rwsem(&ca->bucket_lock); | |
1216 | ||
1c6fdbd8 KO |
1217 | INIT_WORK(&ca->io_error_work, bch2_io_error_work); |
1218 | ||
1219 | bch2_time_stats_init(&ca->io_latency[READ]); | |
1220 | bch2_time_stats_init(&ca->io_latency[WRITE]); | |
1221 | ||
1222 | ca->mi = bch2_mi_to_cpu(member); | |
94119eeb KO |
1223 | |
1224 | for (i = 0; i < ARRAY_SIZE(member->errors); i++) | |
1225 | atomic64_set(&ca->errors[i], le64_to_cpu(member->errors[i])); | |
1226 | ||
1c6fdbd8 KO |
1227 | ca->uuid = member->uuid; |
1228 | ||
f25d8215 KO |
1229 | ca->nr_btree_reserve = DIV_ROUND_UP(BTREE_NODE_RESERVE, |
1230 | ca->mi.bucket_size / btree_sectors(c)); | |
1231 | ||
1c6fdbd8 KO |
1232 | if (percpu_ref_init(&ca->ref, bch2_dev_ref_complete, |
1233 | 0, GFP_KERNEL) || | |
1234 | percpu_ref_init(&ca->io_ref, bch2_dev_io_ref_complete, | |
1235 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d1170ce5 | 1236 | !(ca->sb_read_scratch = (void *) __get_free_page(GFP_KERNEL)) || |
1c6fdbd8 KO |
1237 | bch2_dev_buckets_alloc(c, ca) || |
1238 | bioset_init(&ca->replica_set, 4, | |
1239 | offsetof(struct bch_write_bio, bio), 0) || | |
1240 | !(ca->io_done = alloc_percpu(*ca->io_done))) | |
1241 | goto err; | |
1242 | ||
1243 | return ca; | |
1244 | err: | |
1245 | bch2_dev_free(ca); | |
1246 | return NULL; | |
1247 | } | |
1248 | ||
1249 | static void bch2_dev_attach(struct bch_fs *c, struct bch_dev *ca, | |
1250 | unsigned dev_idx) | |
1251 | { | |
1252 | ca->dev_idx = dev_idx; | |
1253 | __set_bit(ca->dev_idx, ca->self.d); | |
1254 | scnprintf(ca->name, sizeof(ca->name), "dev-%u", dev_idx); | |
1255 | ||
1256 | ca->fs = c; | |
1257 | rcu_assign_pointer(c->devs[ca->dev_idx], ca); | |
1258 | ||
1259 | if (bch2_dev_sysfs_online(c, ca)) | |
1260 | pr_warn("error creating sysfs objects"); | |
1261 | } | |
1262 | ||
1263 | static int bch2_dev_alloc(struct bch_fs *c, unsigned dev_idx) | |
1264 | { | |
1241df58 | 1265 | struct bch_member member = bch2_sb_member_get(c->disk_sb.sb, dev_idx); |
1c6fdbd8 KO |
1266 | struct bch_dev *ca = NULL; |
1267 | int ret = 0; | |
1268 | ||
1c6fdbd8 KO |
1269 | if (bch2_fs_init_fault("dev_alloc")) |
1270 | goto err; | |
1271 | ||
1241df58 | 1272 | ca = __bch2_dev_alloc(c, &member); |
1c6fdbd8 KO |
1273 | if (!ca) |
1274 | goto err; | |
1275 | ||
220d2062 KO |
1276 | ca->fs = c; |
1277 | ||
1c6fdbd8 | 1278 | bch2_dev_attach(c, ca, dev_idx); |
1c6fdbd8 KO |
1279 | return ret; |
1280 | err: | |
1281 | if (ca) | |
1282 | bch2_dev_free(ca); | |
c8b4534d | 1283 | return -BCH_ERR_ENOMEM_dev_alloc; |
1c6fdbd8 KO |
1284 | } |
1285 | ||
1286 | static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb) | |
1287 | { | |
1288 | unsigned ret; | |
1289 | ||
1290 | if (bch2_dev_is_online(ca)) { | |
1291 | bch_err(ca, "already have device online in slot %u", | |
1292 | sb->sb->dev_idx); | |
78c0b75c | 1293 | return -BCH_ERR_device_already_online; |
1c6fdbd8 KO |
1294 | } |
1295 | ||
1296 | if (get_capacity(sb->bdev->bd_disk) < | |
1297 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1298 | bch_err(ca, "cannot online: device too small"); | |
78c0b75c | 1299 | return -BCH_ERR_device_size_too_small; |
1c6fdbd8 KO |
1300 | } |
1301 | ||
1302 | BUG_ON(!percpu_ref_is_zero(&ca->io_ref)); | |
1303 | ||
1c6fdbd8 KO |
1304 | ret = bch2_dev_journal_init(ca, sb->sb); |
1305 | if (ret) | |
1306 | return ret; | |
1307 | ||
1308 | /* Commit: */ | |
1309 | ca->disk_sb = *sb; | |
1310 | memset(sb, 0, sizeof(*sb)); | |
1311 | ||
eacb2574 KO |
1312 | ca->dev = ca->disk_sb.bdev->bd_dev; |
1313 | ||
1c6fdbd8 KO |
1314 | percpu_ref_reinit(&ca->io_ref); |
1315 | ||
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb) | |
1320 | { | |
1321 | struct bch_dev *ca; | |
1322 | int ret; | |
1323 | ||
1324 | lockdep_assert_held(&c->state_lock); | |
1325 | ||
1326 | if (le64_to_cpu(sb->sb->seq) > | |
1327 | le64_to_cpu(c->disk_sb.sb->seq)) | |
1328 | bch2_sb_to_fs(c, sb->sb); | |
1329 | ||
1330 | BUG_ON(sb->sb->dev_idx >= c->sb.nr_devices || | |
1331 | !c->devs[sb->sb->dev_idx]); | |
1332 | ||
1333 | ca = bch_dev_locked(c, sb->sb->dev_idx); | |
1334 | ||
1335 | ret = __bch2_dev_attach_bdev(ca, sb); | |
1336 | if (ret) | |
1337 | return ret; | |
1338 | ||
1339 | bch2_dev_sysfs_online(c, ca); | |
1340 | ||
1341 | if (c->sb.nr_devices == 1) | |
1342 | snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev); | |
1343 | snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev); | |
1344 | ||
1345 | rebalance_wakeup(c); | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | /* Device management: */ | |
1350 | ||
1351 | /* | |
1352 | * Note: this function is also used by the error paths - when a particular | |
1353 | * device sees an error, we call it to determine whether we can just set the | |
1354 | * device RO, or - if this function returns false - we'll set the whole | |
1355 | * filesystem RO: | |
1356 | * | |
1357 | * XXX: maybe we should be more explicit about whether we're changing state | |
1358 | * because we got an error or what have you? | |
1359 | */ | |
1360 | bool bch2_dev_state_allowed(struct bch_fs *c, struct bch_dev *ca, | |
1361 | enum bch_member_state new_state, int flags) | |
1362 | { | |
1363 | struct bch_devs_mask new_online_devs; | |
1c6fdbd8 KO |
1364 | struct bch_dev *ca2; |
1365 | int i, nr_rw = 0, required; | |
1366 | ||
1367 | lockdep_assert_held(&c->state_lock); | |
1368 | ||
1369 | switch (new_state) { | |
2436cb9f | 1370 | case BCH_MEMBER_STATE_rw: |
1c6fdbd8 | 1371 | return true; |
2436cb9f KO |
1372 | case BCH_MEMBER_STATE_ro: |
1373 | if (ca->mi.state != BCH_MEMBER_STATE_rw) | |
1c6fdbd8 KO |
1374 | return true; |
1375 | ||
1376 | /* do we have enough devices to write to? */ | |
1377 | for_each_member_device(ca2, c, i) | |
1378 | if (ca2 != ca) | |
2436cb9f | 1379 | nr_rw += ca2->mi.state == BCH_MEMBER_STATE_rw; |
1c6fdbd8 KO |
1380 | |
1381 | required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED) | |
1382 | ? c->opts.metadata_replicas | |
1383 | : c->opts.metadata_replicas_required, | |
1384 | !(flags & BCH_FORCE_IF_DATA_DEGRADED) | |
1385 | ? c->opts.data_replicas | |
1386 | : c->opts.data_replicas_required); | |
1387 | ||
1388 | return nr_rw >= required; | |
2436cb9f KO |
1389 | case BCH_MEMBER_STATE_failed: |
1390 | case BCH_MEMBER_STATE_spare: | |
1391 | if (ca->mi.state != BCH_MEMBER_STATE_rw && | |
1392 | ca->mi.state != BCH_MEMBER_STATE_ro) | |
1c6fdbd8 KO |
1393 | return true; |
1394 | ||
1395 | /* do we have enough devices to read from? */ | |
1396 | new_online_devs = bch2_online_devs(c); | |
1397 | __clear_bit(ca->dev_idx, new_online_devs.d); | |
1398 | ||
fcb3431b | 1399 | return bch2_have_enough_devs(c, new_online_devs, flags, false); |
1c6fdbd8 KO |
1400 | default: |
1401 | BUG(); | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | static bool bch2_fs_may_start(struct bch_fs *c) | |
1406 | { | |
1c6fdbd8 | 1407 | struct bch_dev *ca; |
fcb3431b KO |
1408 | unsigned i, flags = 0; |
1409 | ||
1410 | if (c->opts.very_degraded) | |
1411 | flags |= BCH_FORCE_IF_DEGRADED|BCH_FORCE_IF_LOST; | |
1c6fdbd8 | 1412 | |
fcb3431b KO |
1413 | if (c->opts.degraded) |
1414 | flags |= BCH_FORCE_IF_DEGRADED; | |
1415 | ||
1416 | if (!c->opts.degraded && | |
1417 | !c->opts.very_degraded) { | |
1c6fdbd8 | 1418 | mutex_lock(&c->sb_lock); |
1c6fdbd8 KO |
1419 | |
1420 | for (i = 0; i < c->disk_sb.sb->nr_devices; i++) { | |
1241df58 | 1421 | if (!bch2_dev_exists(c->disk_sb.sb, i)) |
1c6fdbd8 KO |
1422 | continue; |
1423 | ||
1424 | ca = bch_dev_locked(c, i); | |
1425 | ||
1426 | if (!bch2_dev_is_online(ca) && | |
2436cb9f KO |
1427 | (ca->mi.state == BCH_MEMBER_STATE_rw || |
1428 | ca->mi.state == BCH_MEMBER_STATE_ro)) { | |
1c6fdbd8 KO |
1429 | mutex_unlock(&c->sb_lock); |
1430 | return false; | |
1431 | } | |
1432 | } | |
1433 | mutex_unlock(&c->sb_lock); | |
1434 | } | |
1435 | ||
fcb3431b | 1436 | return bch2_have_enough_devs(c, bch2_online_devs(c), flags, true); |
1c6fdbd8 KO |
1437 | } |
1438 | ||
1439 | static void __bch2_dev_read_only(struct bch_fs *c, struct bch_dev *ca) | |
1440 | { | |
1c6fdbd8 KO |
1441 | /* |
1442 | * The allocator thread itself allocates btree nodes, so stop it first: | |
1443 | */ | |
1c6fdbd8 KO |
1444 | bch2_dev_allocator_remove(c, ca); |
1445 | bch2_dev_journal_stop(&c->journal, ca); | |
1446 | } | |
1447 | ||
f25d8215 | 1448 | static void __bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca) |
1c6fdbd8 KO |
1449 | { |
1450 | lockdep_assert_held(&c->state_lock); | |
1451 | ||
2436cb9f | 1452 | BUG_ON(ca->mi.state != BCH_MEMBER_STATE_rw); |
1c6fdbd8 KO |
1453 | |
1454 | bch2_dev_allocator_add(c, ca); | |
1455 | bch2_recalc_capacity(c); | |
1c6fdbd8 KO |
1456 | } |
1457 | ||
1458 | int __bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1459 | enum bch_member_state new_state, int flags) | |
1460 | { | |
3f7b9713 | 1461 | struct bch_member *m; |
1c6fdbd8 KO |
1462 | int ret = 0; |
1463 | ||
1464 | if (ca->mi.state == new_state) | |
1465 | return 0; | |
1466 | ||
1467 | if (!bch2_dev_state_allowed(c, ca, new_state, flags)) | |
78c0b75c | 1468 | return -BCH_ERR_device_state_not_allowed; |
1c6fdbd8 | 1469 | |
2436cb9f | 1470 | if (new_state != BCH_MEMBER_STATE_rw) |
1c6fdbd8 KO |
1471 | __bch2_dev_read_only(c, ca); |
1472 | ||
2436cb9f | 1473 | bch_notice(ca, "%s", bch2_member_states[new_state]); |
1c6fdbd8 KO |
1474 | |
1475 | mutex_lock(&c->sb_lock); | |
3f7b9713 HS |
1476 | m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx); |
1477 | SET_BCH_MEMBER_STATE(m, new_state); | |
1c6fdbd8 KO |
1478 | bch2_write_super(c); |
1479 | mutex_unlock(&c->sb_lock); | |
1480 | ||
e2b60560 | 1481 | if (new_state == BCH_MEMBER_STATE_rw) |
f25d8215 | 1482 | __bch2_dev_read_write(c, ca); |
1c6fdbd8 KO |
1483 | |
1484 | rebalance_wakeup(c); | |
1485 | ||
1486 | return ret; | |
1487 | } | |
1488 | ||
1489 | int bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1490 | enum bch_member_state new_state, int flags) | |
1491 | { | |
1492 | int ret; | |
1493 | ||
1ada1606 | 1494 | down_write(&c->state_lock); |
1c6fdbd8 | 1495 | ret = __bch2_dev_set_state(c, ca, new_state, flags); |
1ada1606 | 1496 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1497 | |
1498 | return ret; | |
1499 | } | |
1500 | ||
1501 | /* Device add/removal: */ | |
1502 | ||
c0ebe3e4 | 1503 | static int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca) |
5d20ba48 | 1504 | { |
c6b2826c KO |
1505 | struct bpos start = POS(ca->dev_idx, 0); |
1506 | struct bpos end = POS(ca->dev_idx, U64_MAX); | |
5d20ba48 KO |
1507 | int ret; |
1508 | ||
a9c0a4cb KO |
1509 | /* |
1510 | * We clear the LRU and need_discard btrees first so that we don't race | |
1511 | * with bch2_do_invalidates() and bch2_do_discards() | |
1512 | */ | |
1513 | ret = bch2_btree_delete_range(c, BTREE_ID_lru, start, end, | |
1514 | BTREE_TRIGGER_NORUN, NULL) ?: | |
1515 | bch2_btree_delete_range(c, BTREE_ID_need_discard, start, end, | |
c6b2826c KO |
1516 | BTREE_TRIGGER_NORUN, NULL) ?: |
1517 | bch2_btree_delete_range(c, BTREE_ID_freespace, start, end, | |
1518 | BTREE_TRIGGER_NORUN, NULL) ?: | |
a8c752bb KO |
1519 | bch2_btree_delete_range(c, BTREE_ID_backpointers, start, end, |
1520 | BTREE_TRIGGER_NORUN, NULL) ?: | |
a9c0a4cb | 1521 | bch2_btree_delete_range(c, BTREE_ID_alloc, start, end, |
02d51bb9 BF |
1522 | BTREE_TRIGGER_NORUN, NULL) ?: |
1523 | bch2_btree_delete_range(c, BTREE_ID_bucket_gens, start, end, | |
c6b2826c | 1524 | BTREE_TRIGGER_NORUN, NULL); |
cf904c8d | 1525 | bch_err_msg(c, ret, "removing dev alloc info"); |
c6b2826c | 1526 | return ret; |
5d20ba48 KO |
1527 | } |
1528 | ||
1c6fdbd8 KO |
1529 | int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags) |
1530 | { | |
3f7b9713 | 1531 | struct bch_member *m; |
1c6fdbd8 | 1532 | unsigned dev_idx = ca->dev_idx, data; |
78c0b75c | 1533 | int ret; |
1c6fdbd8 | 1534 | |
1ada1606 | 1535 | down_write(&c->state_lock); |
1c6fdbd8 | 1536 | |
31ba2cd3 KO |
1537 | /* |
1538 | * We consume a reference to ca->ref, regardless of whether we succeed | |
1539 | * or fail: | |
1540 | */ | |
1541 | percpu_ref_put(&ca->ref); | |
1c6fdbd8 | 1542 | |
2436cb9f | 1543 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) { |
1c6fdbd8 | 1544 | bch_err(ca, "Cannot remove without losing data"); |
78c0b75c | 1545 | ret = -BCH_ERR_device_state_not_allowed; |
1c6fdbd8 KO |
1546 | goto err; |
1547 | } | |
1548 | ||
1549 | __bch2_dev_read_only(c, ca); | |
1550 | ||
1c6fdbd8 | 1551 | ret = bch2_dev_data_drop(c, ca->dev_idx, flags); |
cf904c8d KO |
1552 | bch_err_msg(ca, ret, "dropping data"); |
1553 | if (ret) | |
1c6fdbd8 | 1554 | goto err; |
1c6fdbd8 | 1555 | |
a9c0a4cb | 1556 | ret = bch2_dev_remove_alloc(c, ca); |
cf904c8d KO |
1557 | bch_err_msg(ca, ret, "deleting alloc info"); |
1558 | if (ret) | |
1c6fdbd8 | 1559 | goto err; |
1c6fdbd8 | 1560 | |
a9c0a4cb | 1561 | ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx); |
cf904c8d KO |
1562 | bch_err_msg(ca, ret, "flushing journal"); |
1563 | if (ret) | |
1c6fdbd8 | 1564 | goto err; |
1c6fdbd8 | 1565 | |
a9c0a4cb | 1566 | ret = bch2_journal_flush(&c->journal); |
cf904c8d KO |
1567 | bch_err(ca, "journal error"); |
1568 | if (ret) | |
1c6fdbd8 | 1569 | goto err; |
1c6fdbd8 | 1570 | |
31ba2cd3 | 1571 | ret = bch2_replicas_gc2(c); |
cf904c8d KO |
1572 | bch_err_msg(ca, ret, "in replicas_gc2()"); |
1573 | if (ret) | |
31ba2cd3 | 1574 | goto err; |
31ba2cd3 KO |
1575 | |
1576 | data = bch2_dev_has_data(c, ca); | |
1577 | if (data) { | |
fa8e94fa | 1578 | struct printbuf data_has = PRINTBUF; |
31ba2cd3 | 1579 | |
401ec4db | 1580 | prt_bitflags(&data_has, bch2_data_types, data); |
fa8e94fa KO |
1581 | bch_err(ca, "Remove failed, still has data (%s)", data_has.buf); |
1582 | printbuf_exit(&data_has); | |
31ba2cd3 KO |
1583 | ret = -EBUSY; |
1584 | goto err; | |
1585 | } | |
1586 | ||
1c6fdbd8 KO |
1587 | __bch2_dev_offline(c, ca); |
1588 | ||
1589 | mutex_lock(&c->sb_lock); | |
1590 | rcu_assign_pointer(c->devs[ca->dev_idx], NULL); | |
1591 | mutex_unlock(&c->sb_lock); | |
1592 | ||
1593 | percpu_ref_kill(&ca->ref); | |
1594 | wait_for_completion(&ca->ref_completion); | |
1595 | ||
1596 | bch2_dev_free(ca); | |
1597 | ||
bc652905 BF |
1598 | /* |
1599 | * At this point the device object has been removed in-core, but the | |
1600 | * on-disk journal might still refer to the device index via sb device | |
1601 | * usage entries. Recovery fails if it sees usage information for an | |
1602 | * invalid device. Flush journal pins to push the back of the journal | |
1603 | * past now invalid device index references before we update the | |
1604 | * superblock, but after the device object has been removed so any | |
1605 | * further journal writes elide usage info for the device. | |
1606 | */ | |
1607 | bch2_journal_flush_all_pins(&c->journal); | |
1608 | ||
1c6fdbd8 KO |
1609 | /* |
1610 | * Free this device's slot in the bch_member array - all pointers to | |
1611 | * this device must be gone: | |
1612 | */ | |
1613 | mutex_lock(&c->sb_lock); | |
3f7b9713 HS |
1614 | m = bch2_members_v2_get_mut(c->disk_sb.sb, dev_idx); |
1615 | memset(&m->uuid, 0, sizeof(m->uuid)); | |
1c6fdbd8 KO |
1616 | |
1617 | bch2_write_super(c); | |
1618 | ||
1619 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1620 | up_write(&c->state_lock); |
180fb49d KO |
1621 | |
1622 | bch2_dev_usage_journal_reserve(c); | |
1c6fdbd8 KO |
1623 | return 0; |
1624 | err: | |
2436cb9f | 1625 | if (ca->mi.state == BCH_MEMBER_STATE_rw && |
d3bb629d | 1626 | !percpu_ref_is_zero(&ca->io_ref)) |
1c6fdbd8 | 1627 | __bch2_dev_read_write(c, ca); |
1ada1606 | 1628 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1629 | return ret; |
1630 | } | |
1631 | ||
1632 | /* Add new device to running filesystem: */ | |
1633 | int bch2_dev_add(struct bch_fs *c, const char *path) | |
1634 | { | |
1635 | struct bch_opts opts = bch2_opts_empty(); | |
1636 | struct bch_sb_handle sb; | |
1c6fdbd8 | 1637 | struct bch_dev *ca = NULL; |
3f7b9713 | 1638 | struct bch_sb_field_members_v2 *mi; |
1c6fdbd8 KO |
1639 | struct bch_member dev_mi; |
1640 | unsigned dev_idx, nr_devices, u64s; | |
fa8e94fa | 1641 | struct printbuf errbuf = PRINTBUF; |
02afcb8c | 1642 | struct printbuf label = PRINTBUF; |
1c6fdbd8 KO |
1643 | int ret; |
1644 | ||
1645 | ret = bch2_read_super(path, &opts, &sb); | |
cf904c8d KO |
1646 | bch_err_msg(c, ret, "reading super"); |
1647 | if (ret) | |
efe68e1d | 1648 | goto err; |
1c6fdbd8 | 1649 | |
1241df58 | 1650 | dev_mi = bch2_sb_member_get(sb.sb, sb.sb->dev_idx); |
1c6fdbd8 | 1651 | |
02afcb8c | 1652 | if (BCH_MEMBER_GROUP(&dev_mi)) { |
e677179b | 1653 | bch2_disk_path_to_text_sb(&label, sb.sb, BCH_MEMBER_GROUP(&dev_mi) - 1); |
02afcb8c KO |
1654 | if (label.allocation_failure) { |
1655 | ret = -ENOMEM; | |
1656 | goto err; | |
1657 | } | |
1658 | } | |
1659 | ||
78c0b75c | 1660 | ret = bch2_dev_may_add(sb.sb, c); |
cf904c8d | 1661 | if (ret) |
efe68e1d | 1662 | goto err; |
1c6fdbd8 KO |
1663 | |
1664 | ca = __bch2_dev_alloc(c, &dev_mi); | |
1665 | if (!ca) { | |
efe68e1d KO |
1666 | ret = -ENOMEM; |
1667 | goto err; | |
1c6fdbd8 KO |
1668 | } |
1669 | ||
822835ff KO |
1670 | bch2_dev_usage_init(ca); |
1671 | ||
1c6fdbd8 | 1672 | ret = __bch2_dev_attach_bdev(ca, &sb); |
71933fb6 | 1673 | if (ret) |
efe68e1d | 1674 | goto err; |
1c6fdbd8 | 1675 | |
1c6fdbd8 | 1676 | ret = bch2_dev_journal_alloc(ca); |
cf904c8d KO |
1677 | bch_err_msg(c, ret, "allocating journal"); |
1678 | if (ret) | |
1c6fdbd8 KO |
1679 | goto err; |
1680 | ||
1ada1606 | 1681 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1682 | mutex_lock(&c->sb_lock); |
1683 | ||
1c6fdbd8 | 1684 | ret = bch2_sb_from_fs(c, ca); |
cf904c8d KO |
1685 | bch_err_msg(c, ret, "setting up new superblock"); |
1686 | if (ret) | |
1c6fdbd8 KO |
1687 | goto err_unlock; |
1688 | ||
1c6fdbd8 KO |
1689 | if (dynamic_fault("bcachefs:add:no_slot")) |
1690 | goto no_slot; | |
1691 | ||
1c6fdbd8 | 1692 | for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++) |
1241df58 | 1693 | if (!bch2_dev_exists(c->disk_sb.sb, dev_idx)) |
1c6fdbd8 KO |
1694 | goto have_slot; |
1695 | no_slot: | |
098ef98d | 1696 | ret = -BCH_ERR_ENOSPC_sb_members; |
e46c181a | 1697 | bch_err_msg(c, ret, "setting up new superblock"); |
1c6fdbd8 KO |
1698 | goto err_unlock; |
1699 | ||
1700 | have_slot: | |
1701 | nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices); | |
e8484348 KO |
1702 | |
1703 | mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); | |
3f7b9713 HS |
1704 | u64s = DIV_ROUND_UP(sizeof(struct bch_sb_field_members_v2) + |
1705 | le16_to_cpu(mi->member_bytes) * nr_devices, sizeof(u64)); | |
1c6fdbd8 | 1706 | |
4637429e | 1707 | mi = bch2_sb_field_resize(&c->disk_sb, members_v2, u64s); |
e8536925 | 1708 | if (!mi) { |
098ef98d | 1709 | ret = -BCH_ERR_ENOSPC_sb_members; |
e46c181a | 1710 | bch_err_msg(c, ret, "setting up new superblock"); |
1c6fdbd8 | 1711 | goto err_unlock; |
e8536925 | 1712 | } |
3f7b9713 | 1713 | struct bch_member *m = bch2_members_v2_get_mut(c->disk_sb.sb, dev_idx); |
1c6fdbd8 KO |
1714 | |
1715 | /* success: */ | |
1716 | ||
3f7b9713 HS |
1717 | *m = dev_mi; |
1718 | m->last_mount = cpu_to_le64(ktime_get_real_seconds()); | |
1c6fdbd8 KO |
1719 | c->disk_sb.sb->nr_devices = nr_devices; |
1720 | ||
1721 | ca->disk_sb.sb->dev_idx = dev_idx; | |
1722 | bch2_dev_attach(c, ca, dev_idx); | |
1723 | ||
02afcb8c KO |
1724 | if (BCH_MEMBER_GROUP(&dev_mi)) { |
1725 | ret = __bch2_dev_group_set(c, ca, label.buf); | |
cf904c8d KO |
1726 | bch_err_msg(c, ret, "creating new label"); |
1727 | if (ret) | |
02afcb8c | 1728 | goto err_unlock; |
02afcb8c KO |
1729 | } |
1730 | ||
1c6fdbd8 KO |
1731 | bch2_write_super(c); |
1732 | mutex_unlock(&c->sb_lock); | |
1733 | ||
180fb49d KO |
1734 | bch2_dev_usage_journal_reserve(c); |
1735 | ||
d62ab355 | 1736 | ret = bch2_trans_mark_dev_sb(c, ca); |
cf904c8d KO |
1737 | bch_err_msg(ca, ret, "marking new superblock"); |
1738 | if (ret) | |
bfcf840d | 1739 | goto err_late; |
8d6b6222 | 1740 | |
c6b2826c | 1741 | ret = bch2_fs_freespace_init(c); |
cf904c8d KO |
1742 | bch_err_msg(ca, ret, "initializing free space"); |
1743 | if (ret) | |
c6b2826c | 1744 | goto err_late; |
c6b2826c | 1745 | |
09943313 KO |
1746 | ca->new_fs_bucket_idx = 0; |
1747 | ||
f25d8215 KO |
1748 | if (ca->mi.state == BCH_MEMBER_STATE_rw) |
1749 | __bch2_dev_read_write(c, ca); | |
1c6fdbd8 | 1750 | |
1ada1606 | 1751 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1752 | return 0; |
1753 | ||
1754 | err_unlock: | |
1755 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1756 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1757 | err: |
1758 | if (ca) | |
1759 | bch2_dev_free(ca); | |
1760 | bch2_free_super(&sb); | |
02afcb8c | 1761 | printbuf_exit(&label); |
fa8e94fa | 1762 | printbuf_exit(&errbuf); |
cf904c8d | 1763 | bch_err_fn(c, ret); |
1c6fdbd8 KO |
1764 | return ret; |
1765 | err_late: | |
bfcf840d | 1766 | up_write(&c->state_lock); |
efe68e1d KO |
1767 | ca = NULL; |
1768 | goto err; | |
1c6fdbd8 KO |
1769 | } |
1770 | ||
1771 | /* Hot add existing device to running filesystem: */ | |
1772 | int bch2_dev_online(struct bch_fs *c, const char *path) | |
1773 | { | |
1774 | struct bch_opts opts = bch2_opts_empty(); | |
1775 | struct bch_sb_handle sb = { NULL }; | |
1c6fdbd8 KO |
1776 | struct bch_dev *ca; |
1777 | unsigned dev_idx; | |
1c6fdbd8 KO |
1778 | int ret; |
1779 | ||
1ada1606 | 1780 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1781 | |
1782 | ret = bch2_read_super(path, &opts, &sb); | |
1783 | if (ret) { | |
1ada1606 | 1784 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1785 | return ret; |
1786 | } | |
1787 | ||
1788 | dev_idx = sb.sb->dev_idx; | |
1789 | ||
78c0b75c | 1790 | ret = bch2_dev_in_fs(c->disk_sb.sb, sb.sb); |
cf904c8d KO |
1791 | bch_err_msg(c, ret, "bringing %s online", path); |
1792 | if (ret) | |
1c6fdbd8 KO |
1793 | goto err; |
1794 | ||
e2b60560 KO |
1795 | ret = bch2_dev_attach_bdev(c, &sb); |
1796 | if (ret) | |
1c6fdbd8 | 1797 | goto err; |
1c6fdbd8 KO |
1798 | |
1799 | ca = bch_dev_locked(c, dev_idx); | |
bfcf840d | 1800 | |
e2b60560 | 1801 | ret = bch2_trans_mark_dev_sb(c, ca); |
cf904c8d KO |
1802 | bch_err_msg(c, ret, "bringing %s online: error from bch2_trans_mark_dev_sb", path); |
1803 | if (ret) | |
bfcf840d | 1804 | goto err; |
bfcf840d | 1805 | |
f25d8215 KO |
1806 | if (ca->mi.state == BCH_MEMBER_STATE_rw) |
1807 | __bch2_dev_read_write(c, ca); | |
1c6fdbd8 | 1808 | |
bbe682c7 KO |
1809 | if (!ca->mi.freespace_initialized) { |
1810 | ret = bch2_dev_freespace_init(c, ca, 0, ca->mi.nbuckets); | |
1811 | bch_err_msg(ca, ret, "initializing free space"); | |
1812 | if (ret) | |
1813 | goto err; | |
1814 | } | |
1c6fdbd8 | 1815 | |
bbe682c7 KO |
1816 | if (!ca->journal.nr) { |
1817 | ret = bch2_dev_journal_alloc(ca); | |
1818 | bch_err_msg(ca, ret, "allocating journal"); | |
1819 | if (ret) | |
1820 | goto err; | |
1821 | } | |
1c6fdbd8 | 1822 | |
bbe682c7 KO |
1823 | mutex_lock(&c->sb_lock); |
1824 | bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx)->last_mount = | |
1825 | cpu_to_le64(ktime_get_real_seconds()); | |
1c6fdbd8 KO |
1826 | bch2_write_super(c); |
1827 | mutex_unlock(&c->sb_lock); | |
1828 | ||
1ada1606 | 1829 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1830 | return 0; |
1831 | err: | |
1ada1606 | 1832 | up_write(&c->state_lock); |
1c6fdbd8 | 1833 | bch2_free_super(&sb); |
78c0b75c | 1834 | return ret; |
1c6fdbd8 KO |
1835 | } |
1836 | ||
1837 | int bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca, int flags) | |
1838 | { | |
1ada1606 | 1839 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1840 | |
1841 | if (!bch2_dev_is_online(ca)) { | |
1842 | bch_err(ca, "Already offline"); | |
1ada1606 | 1843 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1844 | return 0; |
1845 | } | |
1846 | ||
2436cb9f | 1847 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) { |
1c6fdbd8 | 1848 | bch_err(ca, "Cannot offline required disk"); |
1ada1606 | 1849 | up_write(&c->state_lock); |
78c0b75c | 1850 | return -BCH_ERR_device_state_not_allowed; |
1c6fdbd8 KO |
1851 | } |
1852 | ||
1853 | __bch2_dev_offline(c, ca); | |
1854 | ||
1ada1606 | 1855 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1856 | return 0; |
1857 | } | |
1858 | ||
1859 | int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets) | |
1860 | { | |
3f7b9713 | 1861 | struct bch_member *m; |
69d1f052 | 1862 | u64 old_nbuckets; |
1c6fdbd8 KO |
1863 | int ret = 0; |
1864 | ||
1ada1606 | 1865 | down_write(&c->state_lock); |
69d1f052 | 1866 | old_nbuckets = ca->mi.nbuckets; |
1c6fdbd8 KO |
1867 | |
1868 | if (nbuckets < ca->mi.nbuckets) { | |
1869 | bch_err(ca, "Cannot shrink yet"); | |
1870 | ret = -EINVAL; | |
1871 | goto err; | |
1872 | } | |
1873 | ||
1874 | if (bch2_dev_is_online(ca) && | |
1875 | get_capacity(ca->disk_sb.bdev->bd_disk) < | |
1876 | ca->mi.bucket_size * nbuckets) { | |
1877 | bch_err(ca, "New size larger than device"); | |
78c0b75c | 1878 | ret = -BCH_ERR_device_size_too_small; |
1c6fdbd8 KO |
1879 | goto err; |
1880 | } | |
1881 | ||
1882 | ret = bch2_dev_buckets_resize(c, ca, nbuckets); | |
cf904c8d KO |
1883 | bch_err_msg(ca, ret, "resizing buckets"); |
1884 | if (ret) | |
1c6fdbd8 | 1885 | goto err; |
1c6fdbd8 | 1886 | |
224ec3e6 | 1887 | ret = bch2_trans_mark_dev_sb(c, ca); |
3e3e02e6 | 1888 | if (ret) |
224ec3e6 | 1889 | goto err; |
224ec3e6 | 1890 | |
1c6fdbd8 | 1891 | mutex_lock(&c->sb_lock); |
3f7b9713 HS |
1892 | m = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx); |
1893 | m->nbuckets = cpu_to_le64(nbuckets); | |
1c6fdbd8 KO |
1894 | |
1895 | bch2_write_super(c); | |
1896 | mutex_unlock(&c->sb_lock); | |
1897 | ||
69d1f052 KO |
1898 | if (ca->mi.freespace_initialized) { |
1899 | ret = bch2_dev_freespace_init(c, ca, old_nbuckets, nbuckets); | |
1900 | if (ret) | |
1901 | goto err; | |
1902 | ||
1903 | /* | |
1904 | * XXX: this is all wrong transactionally - we'll be able to do | |
1905 | * this correctly after the disk space accounting rewrite | |
1906 | */ | |
1907 | ca->usage_base->d[BCH_DATA_free].buckets += nbuckets - old_nbuckets; | |
1908 | } | |
1909 | ||
1c6fdbd8 KO |
1910 | bch2_recalc_capacity(c); |
1911 | err: | |
1ada1606 | 1912 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1913 | return ret; |
1914 | } | |
1915 | ||
1916 | /* return with ref on ca->ref: */ | |
bf7e49a4 | 1917 | struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *name) |
1c6fdbd8 | 1918 | { |
1c6fdbd8 | 1919 | struct bch_dev *ca; |
1c6fdbd8 | 1920 | unsigned i; |
1c6fdbd8 | 1921 | |
3a402c8d KO |
1922 | rcu_read_lock(); |
1923 | for_each_member_device_rcu(ca, c, i, NULL) | |
bf7e49a4 | 1924 | if (!strcmp(name, ca->name)) |
1c6fdbd8 | 1925 | goto found; |
e47a390a | 1926 | ca = ERR_PTR(-BCH_ERR_ENOENT_dev_not_found); |
1c6fdbd8 | 1927 | found: |
3a402c8d KO |
1928 | rcu_read_unlock(); |
1929 | ||
1c6fdbd8 KO |
1930 | return ca; |
1931 | } | |
1932 | ||
1933 | /* Filesystem open: */ | |
1934 | ||
1935 | struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices, | |
1936 | struct bch_opts opts) | |
1937 | { | |
d4c8bb69 | 1938 | DARRAY(struct bch_sb_handle) sbs = { 0 }; |
1c6fdbd8 | 1939 | struct bch_fs *c = NULL; |
defd9e39 | 1940 | struct bch_sb_handle *best = NULL; |
fa8e94fa | 1941 | struct printbuf errbuf = PRINTBUF; |
e2b60560 | 1942 | int ret = 0; |
1c6fdbd8 | 1943 | |
efe68e1d KO |
1944 | if (!try_module_get(THIS_MODULE)) |
1945 | return ERR_PTR(-ENODEV); | |
1946 | ||
1c6fdbd8 | 1947 | if (!nr_devices) { |
efe68e1d KO |
1948 | ret = -EINVAL; |
1949 | goto err; | |
1c6fdbd8 KO |
1950 | } |
1951 | ||
d4c8bb69 KO |
1952 | ret = darray_make_room(&sbs, nr_devices); |
1953 | if (ret) | |
1c6fdbd8 KO |
1954 | goto err; |
1955 | ||
d4c8bb69 KO |
1956 | for (unsigned i = 0; i < nr_devices; i++) { |
1957 | struct bch_sb_handle sb = { NULL }; | |
1958 | ||
1959 | ret = bch2_read_super(devices[i], &opts, &sb); | |
1c6fdbd8 KO |
1960 | if (ret) |
1961 | goto err; | |
1962 | ||
d4c8bb69 | 1963 | BUG_ON(darray_push(&sbs, sb)); |
1c6fdbd8 KO |
1964 | } |
1965 | ||
d4c8bb69 KO |
1966 | darray_for_each(sbs, sb) |
1967 | if (!best || le64_to_cpu(sb->sb->seq) > le64_to_cpu(best->sb->seq)) | |
1968 | best = sb; | |
1969 | ||
1970 | darray_for_each_reverse(sbs, sb) { | |
1971 | if (sb != best && !bch2_dev_exists(best->sb, sb->sb->dev_idx)) { | |
1972 | pr_info("%pg has been removed, skipping", sb->bdev); | |
1973 | bch2_free_super(sb); | |
1974 | darray_remove_item(&sbs, sb); | |
1975 | best -= best > sb; | |
625104ea KO |
1976 | continue; |
1977 | } | |
1978 | ||
d4c8bb69 | 1979 | ret = bch2_dev_in_fs(best->sb, sb->sb); |
78c0b75c | 1980 | if (ret) |
1c6fdbd8 KO |
1981 | goto err_print; |
1982 | } | |
1983 | ||
d4c8bb69 KO |
1984 | c = bch2_fs_alloc(best->sb, opts); |
1985 | ret = PTR_ERR_OR_ZERO(c); | |
1986 | if (ret) | |
1c6fdbd8 KO |
1987 | goto err; |
1988 | ||
1ada1606 | 1989 | down_write(&c->state_lock); |
d4c8bb69 KO |
1990 | darray_for_each(sbs, sb) { |
1991 | ret = bch2_dev_attach_bdev(c, sb); | |
e2b60560 | 1992 | if (ret) { |
1ada1606 | 1993 | up_write(&c->state_lock); |
e2b60560 | 1994 | goto err; |
1c6fdbd8 | 1995 | } |
e2b60560 | 1996 | } |
1ada1606 | 1997 | up_write(&c->state_lock); |
1c6fdbd8 | 1998 | |
78c0b75c KO |
1999 | if (!bch2_fs_may_start(c)) { |
2000 | ret = -BCH_ERR_insufficient_devices_to_start; | |
1c6fdbd8 | 2001 | goto err_print; |
78c0b75c | 2002 | } |
1c6fdbd8 KO |
2003 | |
2004 | if (!c->opts.nostart) { | |
619f5bee KO |
2005 | ret = bch2_fs_start(c); |
2006 | if (ret) | |
2007 | goto err; | |
1c6fdbd8 KO |
2008 | } |
2009 | out: | |
d4c8bb69 KO |
2010 | darray_for_each(sbs, sb) |
2011 | bch2_free_super(sb); | |
2012 | darray_exit(&sbs); | |
fa8e94fa | 2013 | printbuf_exit(&errbuf); |
1c6fdbd8 | 2014 | module_put(THIS_MODULE); |
1c6fdbd8 KO |
2015 | return c; |
2016 | err_print: | |
2017 | pr_err("bch_fs_open err opening %s: %s", | |
78c0b75c | 2018 | devices[0], bch2_err_str(ret)); |
1c6fdbd8 | 2019 | err: |
7be9ab63 | 2020 | if (!IS_ERR_OR_NULL(c)) |
1c6fdbd8 | 2021 | bch2_fs_stop(c); |
1c6fdbd8 KO |
2022 | c = ERR_PTR(ret); |
2023 | goto out; | |
2024 | } | |
2025 | ||
1c6fdbd8 KO |
2026 | /* Global interfaces/init */ |
2027 | ||
2028 | static void bcachefs_exit(void) | |
2029 | { | |
2030 | bch2_debug_exit(); | |
2031 | bch2_vfs_exit(); | |
2032 | bch2_chardev_exit(); | |
14ba3706 | 2033 | bch2_btree_key_cache_exit(); |
1c6fdbd8 KO |
2034 | if (bcachefs_kset) |
2035 | kset_unregister(bcachefs_kset); | |
2036 | } | |
2037 | ||
2038 | static int __init bcachefs_init(void) | |
2039 | { | |
2040 | bch2_bkey_pack_test(); | |
1c6fdbd8 KO |
2041 | |
2042 | if (!(bcachefs_kset = kset_create_and_add("bcachefs", NULL, fs_kobj)) || | |
14ba3706 | 2043 | bch2_btree_key_cache_init() || |
1c6fdbd8 KO |
2044 | bch2_chardev_init() || |
2045 | bch2_vfs_init() || | |
2046 | bch2_debug_init()) | |
2047 | goto err; | |
2048 | ||
2049 | return 0; | |
2050 | err: | |
2051 | bcachefs_exit(); | |
2052 | return -ENOMEM; | |
2053 | } | |
2054 | ||
2055 | #define BCH_DEBUG_PARAM(name, description) \ | |
2056 | bool bch2_##name; \ | |
2057 | module_param_named(name, bch2_##name, bool, 0644); \ | |
2058 | MODULE_PARM_DESC(name, description); | |
2059 | BCH_DEBUG_PARAMS() | |
2060 | #undef BCH_DEBUG_PARAM | |
2061 | ||
e08e63e4 | 2062 | __maybe_unused |
73bd774d | 2063 | static unsigned bch2_metadata_version = bcachefs_metadata_version_current; |
1c6fdbd8 KO |
2064 | module_param_named(version, bch2_metadata_version, uint, 0400); |
2065 | ||
2066 | module_exit(bcachefs_exit); | |
2067 | module_init(bcachefs_init); |