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" | |
38 | #include "io.h" | |
39 | #include "journal.h" | |
40 | #include "journal_reclaim.h" | |
1dd7f9d9 | 41 | #include "journal_seq_blacklist.h" |
1c6fdbd8 KO |
42 | #include "move.h" |
43 | #include "migrate.h" | |
44 | #include "movinggc.h" | |
350175bf | 45 | #include "nocow_locking.h" |
1c6fdbd8 KO |
46 | #include "quota.h" |
47 | #include "rebalance.h" | |
48 | #include "recovery.h" | |
49 | #include "replicas.h" | |
a37ad1a3 | 50 | #include "sb-clean.h" |
8e877caa | 51 | #include "snapshot.h" |
14b393ee | 52 | #include "subvolume.h" |
1c6fdbd8 KO |
53 | #include "super.h" |
54 | #include "super-io.h" | |
55 | #include "sysfs.h" | |
56 | #include "trace.h" | |
57 | ||
58 | #include <linux/backing-dev.h> | |
59 | #include <linux/blkdev.h> | |
60 | #include <linux/debugfs.h> | |
61 | #include <linux/device.h> | |
62 | #include <linux/idr.h> | |
1c6fdbd8 KO |
63 | #include <linux/module.h> |
64 | #include <linux/percpu.h> | |
65 | #include <linux/random.h> | |
66 | #include <linux/sysfs.h> | |
67 | #include <crypto/hash.h> | |
68 | ||
69 | MODULE_LICENSE("GPL"); | |
70 | MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>"); | |
71 | ||
72 | #define KTYPE(type) \ | |
73 | static const struct attribute_group type ## _group = { \ | |
74 | .attrs = type ## _files \ | |
75 | }; \ | |
76 | \ | |
77 | static const struct attribute_group *type ## _groups[] = { \ | |
78 | &type ## _group, \ | |
79 | NULL \ | |
80 | }; \ | |
81 | \ | |
82 | static const struct kobj_type type ## _ktype = { \ | |
83 | .release = type ## _release, \ | |
84 | .sysfs_ops = &type ## _sysfs_ops, \ | |
85 | .default_groups = type ## _groups \ | |
86 | } | |
87 | ||
88 | static void bch2_fs_release(struct kobject *); | |
89 | static void bch2_dev_release(struct kobject *); | |
104c6974 DH |
90 | static void bch2_fs_counters_release(struct kobject *k) |
91 | { | |
92 | } | |
1c6fdbd8 KO |
93 | |
94 | static void bch2_fs_internal_release(struct kobject *k) | |
95 | { | |
96 | } | |
97 | ||
98 | static void bch2_fs_opts_dir_release(struct kobject *k) | |
99 | { | |
100 | } | |
101 | ||
102 | static void bch2_fs_time_stats_release(struct kobject *k) | |
103 | { | |
104 | } | |
105 | ||
106 | KTYPE(bch2_fs); | |
104c6974 | 107 | KTYPE(bch2_fs_counters); |
1c6fdbd8 KO |
108 | KTYPE(bch2_fs_internal); |
109 | KTYPE(bch2_fs_opts_dir); | |
110 | KTYPE(bch2_fs_time_stats); | |
111 | KTYPE(bch2_dev); | |
112 | ||
113 | static struct kset *bcachefs_kset; | |
114 | static LIST_HEAD(bch_fs_list); | |
115 | static DEFINE_MUTEX(bch_fs_list_lock); | |
116 | ||
d94189ad | 117 | DECLARE_WAIT_QUEUE_HEAD(bch2_read_only_wait); |
1c6fdbd8 KO |
118 | |
119 | static void bch2_dev_free(struct bch_dev *); | |
120 | static int bch2_dev_alloc(struct bch_fs *, unsigned); | |
121 | static int bch2_dev_sysfs_online(struct bch_fs *, struct bch_dev *); | |
122 | static void __bch2_dev_read_only(struct bch_fs *, struct bch_dev *); | |
123 | ||
124 | struct bch_fs *bch2_dev_to_fs(dev_t dev) | |
125 | { | |
126 | struct bch_fs *c; | |
127 | struct bch_dev *ca; | |
128 | unsigned i; | |
129 | ||
130 | mutex_lock(&bch_fs_list_lock); | |
131 | rcu_read_lock(); | |
132 | ||
133 | list_for_each_entry(c, &bch_fs_list, list) | |
134 | for_each_member_device_rcu(ca, c, i, NULL) | |
ec4ab9d2 | 135 | if (ca->disk_sb.bdev && ca->disk_sb.bdev->bd_dev == dev) { |
1c6fdbd8 KO |
136 | closure_get(&c->cl); |
137 | goto found; | |
138 | } | |
139 | c = NULL; | |
140 | found: | |
141 | rcu_read_unlock(); | |
142 | mutex_unlock(&bch_fs_list_lock); | |
143 | ||
144 | return c; | |
145 | } | |
146 | ||
147 | static struct bch_fs *__bch2_uuid_to_fs(__uuid_t uuid) | |
148 | { | |
149 | struct bch_fs *c; | |
150 | ||
151 | lockdep_assert_held(&bch_fs_list_lock); | |
152 | ||
153 | list_for_each_entry(c, &bch_fs_list, list) | |
154 | if (!memcmp(&c->disk_sb.sb->uuid, &uuid, sizeof(uuid))) | |
155 | return c; | |
156 | ||
157 | return NULL; | |
158 | } | |
159 | ||
160 | struct bch_fs *bch2_uuid_to_fs(__uuid_t uuid) | |
161 | { | |
162 | struct bch_fs *c; | |
163 | ||
164 | mutex_lock(&bch_fs_list_lock); | |
165 | c = __bch2_uuid_to_fs(uuid); | |
166 | if (c) | |
167 | closure_get(&c->cl); | |
168 | mutex_unlock(&bch_fs_list_lock); | |
169 | ||
170 | return c; | |
171 | } | |
172 | ||
180fb49d KO |
173 | static void bch2_dev_usage_journal_reserve(struct bch_fs *c) |
174 | { | |
175 | struct bch_dev *ca; | |
176 | unsigned i, nr = 0, u64s = | |
4b8f89af KO |
177 | ((sizeof(struct jset_entry_dev_usage) + |
178 | sizeof(struct jset_entry_dev_usage_type) * BCH_DATA_NR)) / | |
179 | sizeof(u64); | |
180fb49d KO |
180 | |
181 | rcu_read_lock(); | |
182 | for_each_member_device_rcu(ca, c, i, NULL) | |
183 | nr++; | |
184 | rcu_read_unlock(); | |
185 | ||
186 | bch2_journal_entry_res_resize(&c->journal, | |
187 | &c->dev_usage_journal_res, u64s * nr); | |
188 | } | |
189 | ||
1c6fdbd8 KO |
190 | /* Filesystem RO/RW: */ |
191 | ||
192 | /* | |
193 | * For startup/shutdown of RW stuff, the dependencies are: | |
194 | * | |
195 | * - foreground writes depend on copygc and rebalance (to free up space) | |
196 | * | |
197 | * - copygc and rebalance depend on mark and sweep gc (they actually probably | |
198 | * don't because they either reserve ahead of time or don't block if | |
199 | * allocations fail, but allocations can require mark and sweep gc to run | |
200 | * because of generation number wraparound) | |
201 | * | |
202 | * - all of the above depends on the allocator threads | |
203 | * | |
204 | * - allocator depends on the journal (when it rewrites prios and gens) | |
205 | */ | |
206 | ||
207 | static void __bch2_fs_read_only(struct bch_fs *c) | |
208 | { | |
209 | struct bch_dev *ca; | |
d5f70c1f | 210 | unsigned i, clean_passes = 0; |
c0960603 | 211 | u64 seq = 0; |
1c6fdbd8 | 212 | |
b40901b0 KO |
213 | bch2_fs_ec_stop(c); |
214 | bch2_open_buckets_stop(c, NULL, true); | |
1c6fdbd8 | 215 | bch2_rebalance_stop(c); |
e6d11615 | 216 | bch2_copygc_stop(c); |
1c6fdbd8 | 217 | bch2_gc_thread_stop(c); |
b40901b0 | 218 | bch2_fs_ec_flush(c); |
1c6fdbd8 | 219 | |
83ec519a KO |
220 | bch_verbose(c, "flushing journal and stopping allocators, journal seq %llu", |
221 | journal_cur_seq(&c->journal)); | |
460651ee | 222 | |
039fc4c5 KO |
223 | do { |
224 | clean_passes++; | |
430735cd | 225 | |
c0960603 KO |
226 | if (bch2_btree_interior_updates_flush(c) || |
227 | bch2_journal_flush_all_pins(&c->journal) || | |
228 | bch2_btree_flush_all_writes(c) || | |
229 | seq != atomic64_read(&c->journal.seq)) { | |
230 | seq = atomic64_read(&c->journal.seq); | |
039fc4c5 KO |
231 | clean_passes = 0; |
232 | } | |
d5f70c1f | 233 | } while (clean_passes < 2); |
2340fd9d | 234 | |
83ec519a KO |
235 | bch_verbose(c, "flushing journal and stopping allocators complete, journal seq %llu", |
236 | journal_cur_seq(&c->journal)); | |
00b8ccf7 | 237 | |
c0960603 KO |
238 | if (test_bit(JOURNAL_REPLAY_DONE, &c->journal.flags) && |
239 | !test_bit(BCH_FS_EMERGENCY_RO, &c->flags)) | |
240 | set_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags); | |
1c6fdbd8 KO |
241 | bch2_fs_journal_stop(&c->journal); |
242 | ||
1c6fdbd8 KO |
243 | /* |
244 | * After stopping journal: | |
245 | */ | |
246 | for_each_member_device(ca, c, i) | |
247 | bch2_dev_allocator_remove(c, ca); | |
248 | } | |
249 | ||
d94189ad | 250 | #ifndef BCH_WRITE_REF_DEBUG |
1c6fdbd8 KO |
251 | static void bch2_writes_disabled(struct percpu_ref *writes) |
252 | { | |
253 | struct bch_fs *c = container_of(writes, struct bch_fs, writes); | |
254 | ||
255 | set_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
d94189ad | 256 | wake_up(&bch2_read_only_wait); |
1c6fdbd8 | 257 | } |
d94189ad | 258 | #endif |
1c6fdbd8 KO |
259 | |
260 | void bch2_fs_read_only(struct bch_fs *c) | |
261 | { | |
134915f3 | 262 | if (!test_bit(BCH_FS_RW, &c->flags)) { |
9ae28f82 | 263 | bch2_journal_reclaim_stop(&c->journal); |
1c6fdbd8 | 264 | return; |
134915f3 | 265 | } |
1c6fdbd8 KO |
266 | |
267 | BUG_ON(test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); | |
268 | ||
269 | /* | |
270 | * Block new foreground-end write operations from starting - any new | |
271 | * writes will return -EROFS: | |
1c6fdbd8 | 272 | */ |
d94189ad KO |
273 | set_bit(BCH_FS_GOING_RO, &c->flags); |
274 | #ifndef BCH_WRITE_REF_DEBUG | |
1c6fdbd8 | 275 | percpu_ref_kill(&c->writes); |
d94189ad KO |
276 | #else |
277 | for (unsigned i = 0; i < BCH_WRITE_REF_NR; i++) | |
278 | bch2_write_ref_put(c, i); | |
279 | #endif | |
1c6fdbd8 | 280 | |
1c6fdbd8 KO |
281 | /* |
282 | * If we're not doing an emergency shutdown, we want to wait on | |
283 | * outstanding writes to complete so they don't see spurious errors due | |
284 | * to shutting down the allocator: | |
285 | * | |
286 | * If we are doing an emergency shutdown outstanding writes may | |
287 | * hang until we shutdown the allocator so we don't want to wait | |
288 | * on outstanding writes before shutting everything down - but | |
289 | * we do need to wait on them before returning and signalling | |
290 | * that going RO is complete: | |
291 | */ | |
d94189ad | 292 | wait_event(bch2_read_only_wait, |
1c6fdbd8 KO |
293 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags) || |
294 | test_bit(BCH_FS_EMERGENCY_RO, &c->flags)); | |
295 | ||
296 | __bch2_fs_read_only(c); | |
297 | ||
d94189ad | 298 | wait_event(bch2_read_only_wait, |
1c6fdbd8 KO |
299 | test_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags)); |
300 | ||
301 | clear_bit(BCH_FS_WRITE_DISABLE_COMPLETE, &c->flags); | |
d94189ad | 302 | clear_bit(BCH_FS_GOING_RO, &c->flags); |
1c6fdbd8 KO |
303 | |
304 | if (!bch2_journal_error(&c->journal) && | |
305 | !test_bit(BCH_FS_ERROR, &c->flags) && | |
3aea4342 | 306 | !test_bit(BCH_FS_EMERGENCY_RO, &c->flags) && |
a0e0bda1 | 307 | test_bit(BCH_FS_STARTED, &c->flags) && |
c0960603 | 308 | test_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags) && |
b2930396 | 309 | !c->opts.norecovery) { |
7724664f KO |
310 | BUG_ON(c->journal.last_empty_seq != journal_cur_seq(&c->journal)); |
311 | BUG_ON(atomic_read(&c->btree_cache.dirty)); | |
312 | BUG_ON(atomic_long_read(&c->btree_key_cache.nr_dirty)); | |
313 | BUG_ON(c->btree_write_buffer.state.nr); | |
314 | ||
b2930396 | 315 | bch_verbose(c, "marking filesystem clean"); |
134915f3 | 316 | bch2_fs_mark_clean(c); |
b2930396 | 317 | } |
1c6fdbd8 | 318 | |
134915f3 | 319 | clear_bit(BCH_FS_RW, &c->flags); |
1c6fdbd8 KO |
320 | } |
321 | ||
322 | static void bch2_fs_read_only_work(struct work_struct *work) | |
323 | { | |
324 | struct bch_fs *c = | |
325 | container_of(work, struct bch_fs, read_only_work); | |
326 | ||
1ada1606 | 327 | down_write(&c->state_lock); |
1c6fdbd8 | 328 | bch2_fs_read_only(c); |
1ada1606 | 329 | up_write(&c->state_lock); |
1c6fdbd8 KO |
330 | } |
331 | ||
332 | static void bch2_fs_read_only_async(struct bch_fs *c) | |
333 | { | |
334 | queue_work(system_long_wq, &c->read_only_work); | |
335 | } | |
336 | ||
337 | bool bch2_fs_emergency_read_only(struct bch_fs *c) | |
338 | { | |
339 | bool ret = !test_and_set_bit(BCH_FS_EMERGENCY_RO, &c->flags); | |
340 | ||
1c6fdbd8 | 341 | bch2_journal_halt(&c->journal); |
9f115ce9 | 342 | bch2_fs_read_only_async(c); |
1c6fdbd8 | 343 | |
d94189ad | 344 | wake_up(&bch2_read_only_wait); |
1c6fdbd8 KO |
345 | return ret; |
346 | } | |
347 | ||
134915f3 | 348 | static int bch2_fs_read_write_late(struct bch_fs *c) |
1c6fdbd8 | 349 | { |
134915f3 | 350 | int ret; |
1c6fdbd8 | 351 | |
ea28c867 KO |
352 | /* |
353 | * Data move operations can't run until after check_snapshots has | |
354 | * completed, and bch2_snapshot_is_ancestor() is available. | |
355 | * | |
356 | * Ideally we'd start copygc/rebalance earlier instead of waiting for | |
357 | * all of recovery/fsck to complete: | |
358 | */ | |
359 | ret = bch2_copygc_start(c); | |
360 | if (ret) { | |
361 | bch_err(c, "error starting copygc thread"); | |
362 | return ret; | |
363 | } | |
364 | ||
134915f3 KO |
365 | ret = bch2_rebalance_start(c); |
366 | if (ret) { | |
367 | bch_err(c, "error starting rebalance thread"); | |
368 | return ret; | |
369 | } | |
370 | ||
134915f3 KO |
371 | return 0; |
372 | } | |
1c6fdbd8 | 373 | |
e731d466 | 374 | static int __bch2_fs_read_write(struct bch_fs *c, bool early) |
134915f3 KO |
375 | { |
376 | struct bch_dev *ca; | |
377 | unsigned i; | |
378 | int ret; | |
379 | ||
aae15aaf KO |
380 | if (test_bit(BCH_FS_INITIAL_GC_UNFIXED, &c->flags)) { |
381 | bch_err(c, "cannot go rw, unfixed btree errors"); | |
7c50140f | 382 | return -BCH_ERR_erofs_unfixed_errors; |
aae15aaf KO |
383 | } |
384 | ||
134915f3 KO |
385 | if (test_bit(BCH_FS_RW, &c->flags)) |
386 | return 0; | |
387 | ||
7c50140f KO |
388 | if (c->opts.norecovery) |
389 | return -BCH_ERR_erofs_norecovery; | |
390 | ||
619f5bee KO |
391 | /* |
392 | * nochanges is used for fsck -n mode - we have to allow going rw | |
393 | * during recovery for that to work: | |
394 | */ | |
7c50140f KO |
395 | if (c->opts.nochanges && (!early || c->opts.read_only)) |
396 | return -BCH_ERR_erofs_nochanges; | |
330581f1 | 397 | |
2c944fa1 KO |
398 | bch_info(c, "going read-write"); |
399 | ||
134915f3 KO |
400 | ret = bch2_fs_mark_dirty(c); |
401 | if (ret) | |
402 | goto err; | |
1c6fdbd8 | 403 | |
c0960603 | 404 | clear_bit(BCH_FS_CLEAN_SHUTDOWN, &c->flags); |
2340fd9d | 405 | |
b9004e85 KO |
406 | /* |
407 | * First journal write must be a flush write: after a clean shutdown we | |
408 | * don't read the journal, so the first journal write may end up | |
409 | * overwriting whatever was there previously, and there must always be | |
410 | * at least one non-flush write in the journal or recovery will fail: | |
411 | */ | |
412 | set_bit(JOURNAL_NEED_FLUSH_WRITE, &c->journal.flags); | |
413 | ||
1c6fdbd8 KO |
414 | for_each_rw_member(ca, c, i) |
415 | bch2_dev_allocator_add(c, ca); | |
416 | bch2_recalc_capacity(c); | |
417 | ||
5f5c7466 KO |
418 | ret = bch2_gc_thread_start(c); |
419 | if (ret) { | |
420 | bch_err(c, "error starting gc thread"); | |
421 | return ret; | |
422 | } | |
423 | ||
197763a7 BF |
424 | ret = bch2_journal_reclaim_start(&c->journal); |
425 | if (ret) | |
426 | goto err; | |
427 | ||
134915f3 KO |
428 | if (!early) { |
429 | ret = bch2_fs_read_write_late(c); | |
430 | if (ret) | |
431 | goto err; | |
432 | } | |
1c6fdbd8 | 433 | |
d94189ad | 434 | #ifndef BCH_WRITE_REF_DEBUG |
134915f3 | 435 | percpu_ref_reinit(&c->writes); |
d94189ad KO |
436 | #else |
437 | for (unsigned i = 0; i < BCH_WRITE_REF_NR; i++) { | |
438 | BUG_ON(atomic_long_read(&c->writes[i])); | |
439 | atomic_long_inc(&c->writes[i]); | |
440 | } | |
441 | #endif | |
134915f3 | 442 | set_bit(BCH_FS_RW, &c->flags); |
4932e07e | 443 | set_bit(BCH_FS_WAS_RW, &c->flags); |
dd81a060 KO |
444 | |
445 | bch2_do_discards(c); | |
446 | bch2_do_invalidates(c); | |
447 | bch2_do_stripe_deletes(c); | |
a1f26d70 | 448 | bch2_do_pending_node_rewrites(c); |
134915f3 | 449 | return 0; |
1c6fdbd8 KO |
450 | err: |
451 | __bch2_fs_read_only(c); | |
134915f3 KO |
452 | return ret; |
453 | } | |
454 | ||
455 | int bch2_fs_read_write(struct bch_fs *c) | |
456 | { | |
457 | return __bch2_fs_read_write(c, false); | |
458 | } | |
459 | ||
460 | int bch2_fs_read_write_early(struct bch_fs *c) | |
461 | { | |
462 | lockdep_assert_held(&c->state_lock); | |
463 | ||
134915f3 | 464 | return __bch2_fs_read_write(c, true); |
1c6fdbd8 KO |
465 | } |
466 | ||
467 | /* Filesystem startup/shutdown: */ | |
468 | ||
d5e4dcc2 | 469 | static void __bch2_fs_free(struct bch_fs *c) |
1c6fdbd8 KO |
470 | { |
471 | unsigned i; | |
1a21bf98 | 472 | int cpu; |
1c6fdbd8 KO |
473 | |
474 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
475 | bch2_time_stats_exit(&c->times[i]); | |
476 | ||
a1f26d70 | 477 | bch2_free_pending_node_rewrites(c); |
104c6974 | 478 | bch2_fs_counters_exit(c); |
14b393ee | 479 | bch2_fs_snapshots_exit(c); |
1c6fdbd8 | 480 | bch2_fs_quota_exit(c); |
dbbfca9f KO |
481 | bch2_fs_fs_io_direct_exit(c); |
482 | bch2_fs_fs_io_buffered_exit(c); | |
1c6fdbd8 | 483 | bch2_fs_fsio_exit(c); |
cd575ddf | 484 | bch2_fs_ec_exit(c); |
1c6fdbd8 KO |
485 | bch2_fs_encryption_exit(c); |
486 | bch2_fs_io_exit(c); | |
21aec962 | 487 | bch2_fs_buckets_waiting_for_journal_exit(c); |
c823c339 | 488 | bch2_fs_btree_interior_update_exit(c); |
36e9d698 | 489 | bch2_fs_btree_iter_exit(c); |
2ca88e5a | 490 | bch2_fs_btree_key_cache_exit(&c->btree_key_cache); |
1c6fdbd8 | 491 | bch2_fs_btree_cache_exit(c); |
9620c3ec | 492 | bch2_fs_replicas_exit(c); |
1c6fdbd8 KO |
493 | bch2_fs_journal_exit(&c->journal); |
494 | bch2_io_clock_exit(&c->io_clock[WRITE]); | |
495 | bch2_io_clock_exit(&c->io_clock[READ]); | |
496 | bch2_fs_compress_exit(c); | |
f1d786a0 | 497 | bch2_journal_keys_free(&c->journal_keys); |
ce6201c4 | 498 | bch2_journal_entries_free(c); |
920e69bc | 499 | bch2_fs_btree_write_buffer_exit(c); |
9166b41d | 500 | percpu_free_rwsem(&c->mark_lock); |
5e82a9a1 | 501 | free_percpu(c->online_reserved); |
1a21bf98 | 502 | |
67e0dd8f | 503 | if (c->btree_paths_bufs) |
1a21bf98 | 504 | for_each_possible_cpu(cpu) |
67e0dd8f | 505 | kfree(per_cpu_ptr(c->btree_paths_bufs, cpu)->path); |
1a21bf98 | 506 | |
faa6cb6c | 507 | darray_exit(&c->btree_roots_extra); |
67e0dd8f | 508 | free_percpu(c->btree_paths_bufs); |
5663a415 | 509 | free_percpu(c->pcpu); |
35189e09 | 510 | mempool_exit(&c->large_bkey_pool); |
1c6fdbd8 KO |
511 | mempool_exit(&c->btree_bounce_pool); |
512 | bioset_exit(&c->btree_bio); | |
1c6fdbd8 | 513 | mempool_exit(&c->fill_iter); |
d94189ad | 514 | #ifndef BCH_WRITE_REF_DEBUG |
1c6fdbd8 | 515 | percpu_ref_exit(&c->writes); |
d94189ad | 516 | #endif |
1c6fdbd8 | 517 | kfree(rcu_dereference_protected(c->disk_groups, 1)); |
1dd7f9d9 | 518 | kfree(c->journal_seq_blacklist_table); |
b5e8a699 | 519 | kfree(c->unused_inode_hints); |
1c6fdbd8 | 520 | |
8bff9875 BF |
521 | if (c->write_ref_wq) |
522 | destroy_workqueue(c->write_ref_wq); | |
3e3e02e6 KO |
523 | if (c->io_complete_wq) |
524 | destroy_workqueue(c->io_complete_wq); | |
1c6fdbd8 KO |
525 | if (c->copygc_wq) |
526 | destroy_workqueue(c->copygc_wq); | |
9f1833ca KO |
527 | if (c->btree_io_complete_wq) |
528 | destroy_workqueue(c->btree_io_complete_wq); | |
731bdd2e KO |
529 | if (c->btree_update_wq) |
530 | destroy_workqueue(c->btree_update_wq); | |
1c6fdbd8 | 531 | |
9d8022db | 532 | bch2_free_super(&c->disk_sb); |
1c6fdbd8 KO |
533 | kvpfree(c, sizeof(*c)); |
534 | module_put(THIS_MODULE); | |
535 | } | |
536 | ||
537 | static void bch2_fs_release(struct kobject *kobj) | |
538 | { | |
539 | struct bch_fs *c = container_of(kobj, struct bch_fs, kobj); | |
540 | ||
d5e4dcc2 | 541 | __bch2_fs_free(c); |
1c6fdbd8 KO |
542 | } |
543 | ||
d5e4dcc2 | 544 | void __bch2_fs_stop(struct bch_fs *c) |
1c6fdbd8 KO |
545 | { |
546 | struct bch_dev *ca; | |
547 | unsigned i; | |
548 | ||
af1c6871 KO |
549 | bch_verbose(c, "shutting down"); |
550 | ||
1dd7f9d9 KO |
551 | set_bit(BCH_FS_STOPPING, &c->flags); |
552 | ||
9b6e2f1e KO |
553 | cancel_work_sync(&c->journal_seq_blacklist_gc_work); |
554 | ||
1ada1606 | 555 | down_write(&c->state_lock); |
883f1a7c | 556 | bch2_fs_read_only(c); |
1ada1606 | 557 | up_write(&c->state_lock); |
883f1a7c | 558 | |
1c6fdbd8 KO |
559 | for_each_member_device(ca, c, i) |
560 | if (ca->kobj.state_in_sysfs && | |
561 | ca->disk_sb.bdev) | |
562 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
563 | ||
564 | if (c->kobj.state_in_sysfs) | |
565 | kobject_del(&c->kobj); | |
566 | ||
567 | bch2_fs_debug_exit(c); | |
568 | bch2_fs_chardev_exit(c); | |
569 | ||
104c6974 | 570 | kobject_put(&c->counters_kobj); |
1c6fdbd8 KO |
571 | kobject_put(&c->time_stats); |
572 | kobject_put(&c->opts_dir); | |
573 | kobject_put(&c->internal); | |
574 | ||
1c6fdbd8 KO |
575 | /* btree prefetch might have kicked off reads in the background: */ |
576 | bch2_btree_flush_all_reads(c); | |
577 | ||
578 | for_each_member_device(ca, c, i) | |
579 | cancel_work_sync(&ca->io_error_work); | |
580 | ||
1c6fdbd8 | 581 | cancel_work_sync(&c->read_only_work); |
d5e4dcc2 KO |
582 | } |
583 | ||
584 | void bch2_fs_free(struct bch_fs *c) | |
585 | { | |
586 | unsigned i; | |
587 | ||
7573041a KO |
588 | BUG_ON(!test_bit(BCH_FS_STOPPING, &c->flags)); |
589 | ||
d5e4dcc2 KO |
590 | mutex_lock(&bch_fs_list_lock); |
591 | list_del(&c->list); | |
592 | mutex_unlock(&bch_fs_list_lock); | |
593 | ||
594 | closure_sync(&c->cl); | |
595 | closure_debug_destroy(&c->cl); | |
596 | ||
597 | for (i = 0; i < c->sb.nr_devices; i++) { | |
598 | struct bch_dev *ca = rcu_dereference_protected(c->devs[i], true); | |
1c6fdbd8 | 599 | |
d5e4dcc2 KO |
600 | if (ca) { |
601 | bch2_free_super(&ca->disk_sb); | |
602 | bch2_dev_free(ca); | |
603 | } | |
604 | } | |
1c6fdbd8 | 605 | |
af1c6871 KO |
606 | bch_verbose(c, "shutdown complete"); |
607 | ||
1c6fdbd8 KO |
608 | kobject_put(&c->kobj); |
609 | } | |
610 | ||
d5e4dcc2 KO |
611 | void bch2_fs_stop(struct bch_fs *c) |
612 | { | |
613 | __bch2_fs_stop(c); | |
614 | bch2_fs_free(c); | |
615 | } | |
616 | ||
e2b60560 | 617 | static int bch2_fs_online(struct bch_fs *c) |
1c6fdbd8 KO |
618 | { |
619 | struct bch_dev *ca; | |
1c6fdbd8 | 620 | unsigned i; |
e2b60560 | 621 | int ret = 0; |
1c6fdbd8 KO |
622 | |
623 | lockdep_assert_held(&bch_fs_list_lock); | |
624 | ||
e2b60560 KO |
625 | if (__bch2_uuid_to_fs(c->sb.uuid)) { |
626 | bch_err(c, "filesystem UUID already open"); | |
627 | return -EINVAL; | |
628 | } | |
1c6fdbd8 KO |
629 | |
630 | ret = bch2_fs_chardev_init(c); | |
e2b60560 KO |
631 | if (ret) { |
632 | bch_err(c, "error creating character device"); | |
633 | return ret; | |
634 | } | |
1c6fdbd8 KO |
635 | |
636 | bch2_fs_debug_init(c); | |
637 | ||
e2b60560 KO |
638 | ret = kobject_add(&c->kobj, NULL, "%pU", c->sb.user_uuid.b) ?: |
639 | kobject_add(&c->internal, &c->kobj, "internal") ?: | |
640 | kobject_add(&c->opts_dir, &c->kobj, "options") ?: | |
641 | kobject_add(&c->time_stats, &c->kobj, "time_stats") ?: | |
104c6974 | 642 | kobject_add(&c->counters_kobj, &c->kobj, "counters") ?: |
e2b60560 KO |
643 | bch2_opts_create_sysfs_files(&c->opts_dir); |
644 | if (ret) { | |
645 | bch_err(c, "error creating sysfs objects"); | |
646 | return ret; | |
647 | } | |
1c6fdbd8 | 648 | |
1ada1606 | 649 | down_write(&c->state_lock); |
1c6fdbd8 | 650 | |
e2b60560 KO |
651 | for_each_member_device(ca, c, i) { |
652 | ret = bch2_dev_sysfs_online(c, ca); | |
653 | if (ret) { | |
654 | bch_err(c, "error creating sysfs objects"); | |
3a402c8d | 655 | percpu_ref_put(&ca->ref); |
1c6fdbd8 | 656 | goto err; |
3a402c8d | 657 | } |
e2b60560 | 658 | } |
1c6fdbd8 | 659 | |
e2b60560 | 660 | BUG_ON(!list_empty(&c->list)); |
1c6fdbd8 | 661 | list_add(&c->list, &bch_fs_list); |
1c6fdbd8 | 662 | err: |
1ada1606 | 663 | up_write(&c->state_lock); |
e2b60560 | 664 | return ret; |
1c6fdbd8 KO |
665 | } |
666 | ||
667 | static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts) | |
668 | { | |
669 | struct bch_sb_field_members *mi; | |
670 | struct bch_fs *c; | |
401ec4db | 671 | struct printbuf name = PRINTBUF; |
ecf37a4a | 672 | unsigned i, iter_size; |
7be9ab63 | 673 | int ret = 0; |
1c6fdbd8 | 674 | |
1c6fdbd8 | 675 | c = kvpmalloc(sizeof(struct bch_fs), GFP_KERNEL|__GFP_ZERO); |
7be9ab63 | 676 | if (!c) { |
65d48e35 | 677 | c = ERR_PTR(-BCH_ERR_ENOMEM_fs_alloc); |
1c6fdbd8 | 678 | goto out; |
7be9ab63 | 679 | } |
1c6fdbd8 KO |
680 | |
681 | __module_get(THIS_MODULE); | |
682 | ||
505b7a4c KO |
683 | closure_init(&c->cl, NULL); |
684 | ||
685 | c->kobj.kset = bcachefs_kset; | |
686 | kobject_init(&c->kobj, &bch2_fs_ktype); | |
687 | kobject_init(&c->internal, &bch2_fs_internal_ktype); | |
688 | kobject_init(&c->opts_dir, &bch2_fs_opts_dir_ktype); | |
689 | kobject_init(&c->time_stats, &bch2_fs_time_stats_ktype); | |
104c6974 | 690 | kobject_init(&c->counters_kobj, &bch2_fs_counters_ktype); |
505b7a4c | 691 | |
1c6fdbd8 KO |
692 | c->minor = -1; |
693 | c->disk_sb.fs_sb = true; | |
694 | ||
1ada1606 | 695 | init_rwsem(&c->state_lock); |
1c6fdbd8 KO |
696 | mutex_init(&c->sb_lock); |
697 | mutex_init(&c->replicas_gc_lock); | |
698 | mutex_init(&c->btree_root_lock); | |
699 | INIT_WORK(&c->read_only_work, bch2_fs_read_only_work); | |
700 | ||
701 | init_rwsem(&c->gc_lock); | |
c45c8667 | 702 | mutex_init(&c->gc_gens_lock); |
1c6fdbd8 KO |
703 | |
704 | for (i = 0; i < BCH_TIME_STAT_NR; i++) | |
705 | bch2_time_stats_init(&c->times[i]); | |
706 | ||
e6d11615 | 707 | bch2_fs_copygc_init(c); |
2ca88e5a | 708 | bch2_fs_btree_key_cache_init_early(&c->btree_key_cache); |
65db6049 | 709 | bch2_fs_btree_interior_update_init_early(c); |
b092dadd KO |
710 | bch2_fs_allocator_background_init(c); |
711 | bch2_fs_allocator_foreground_init(c); | |
1c6fdbd8 KO |
712 | bch2_fs_rebalance_init(c); |
713 | bch2_fs_quota_init(c); | |
84c72755 | 714 | bch2_fs_ec_init_early(c); |
b9fa375b | 715 | bch2_fs_move_init(c); |
1c6fdbd8 KO |
716 | |
717 | INIT_LIST_HEAD(&c->list); | |
718 | ||
4d8100da KO |
719 | mutex_init(&c->usage_scratch_lock); |
720 | ||
1c6fdbd8 | 721 | mutex_init(&c->bio_bounce_pages_lock); |
14b393ee | 722 | mutex_init(&c->snapshot_table_lock); |
1c6fdbd8 | 723 | |
1c6fdbd8 | 724 | spin_lock_init(&c->btree_write_error_lock); |
1c6fdbd8 | 725 | |
9b6e2f1e KO |
726 | INIT_WORK(&c->journal_seq_blacklist_gc_work, |
727 | bch2_blacklist_entries_gc); | |
728 | ||
5b593ee1 | 729 | INIT_LIST_HEAD(&c->journal_iters); |
f1d786a0 | 730 | |
1c6fdbd8 KO |
731 | INIT_LIST_HEAD(&c->fsck_errors); |
732 | mutex_init(&c->fsck_error_lock); | |
733 | ||
734 | seqcount_init(&c->gc_pos_lock); | |
735 | ||
5e82a9a1 KO |
736 | seqcount_init(&c->usage_lock); |
737 | ||
ef1b2092 KO |
738 | sema_init(&c->io_in_flight, 128); |
739 | ||
9edbcc72 KO |
740 | INIT_LIST_HEAD(&c->vfs_inodes_list); |
741 | mutex_init(&c->vfs_inodes_lock); | |
742 | ||
1c6fdbd8 KO |
743 | c->copy_gc_enabled = 1; |
744 | c->rebalance.enabled = 1; | |
745 | c->promote_whole_extents = true; | |
746 | ||
991ba021 KO |
747 | c->journal.flush_write_time = &c->times[BCH_TIME_journal_flush_write]; |
748 | c->journal.noflush_write_time = &c->times[BCH_TIME_journal_noflush_write]; | |
749 | c->journal.blocked_time = &c->times[BCH_TIME_blocked_journal]; | |
750 | c->journal.flush_seq_time = &c->times[BCH_TIME_journal_flush_seq]; | |
1c6fdbd8 KO |
751 | |
752 | bch2_fs_btree_cache_init_early(&c->btree_cache); | |
753 | ||
fca1223c KO |
754 | mutex_init(&c->sectors_available_lock); |
755 | ||
e2b60560 KO |
756 | ret = percpu_init_rwsem(&c->mark_lock); |
757 | if (ret) | |
73e6ab95 KO |
758 | goto err; |
759 | ||
1c6fdbd8 | 760 | mutex_lock(&c->sb_lock); |
e2b60560 KO |
761 | ret = bch2_sb_to_fs(c, sb); |
762 | mutex_unlock(&c->sb_lock); | |
1c6fdbd8 | 763 | |
e2b60560 | 764 | if (ret) |
1c6fdbd8 | 765 | goto err; |
1c6fdbd8 | 766 | |
401ec4db | 767 | pr_uuid(&name, c->sb.user_uuid.b); |
3e3e02e6 | 768 | strscpy(c->name, name.buf, sizeof(c->name)); |
401ec4db KO |
769 | printbuf_exit(&name); |
770 | ||
65d48e35 | 771 | ret = name.allocation_failure ? -BCH_ERR_ENOMEM_fs_name_alloc : 0; |
401ec4db KO |
772 | if (ret) |
773 | goto err; | |
1c6fdbd8 | 774 | |
2430e72f | 775 | /* Compat: */ |
73bd774d | 776 | if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_inode_v2 && |
2430e72f KO |
777 | !BCH_SB_JOURNAL_FLUSH_DELAY(sb)) |
778 | SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000); | |
779 | ||
73bd774d | 780 | if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_inode_v2 && |
2430e72f KO |
781 | !BCH_SB_JOURNAL_RECLAIM_DELAY(sb)) |
782 | SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 100); | |
783 | ||
1c6fdbd8 | 784 | c->opts = bch2_opts_default; |
8244f320 KO |
785 | ret = bch2_opts_from_sb(&c->opts, sb); |
786 | if (ret) | |
787 | goto err; | |
788 | ||
1c6fdbd8 KO |
789 | bch2_opts_apply(&c->opts, opts); |
790 | ||
7c8f6f98 KO |
791 | c->btree_key_cache_btrees |= 1U << BTREE_ID_alloc; |
792 | if (c->opts.inodes_use_key_cache) | |
793 | c->btree_key_cache_btrees |= 1U << BTREE_ID_inodes; | |
794 | ||
8244f320 | 795 | c->block_bits = ilog2(block_sectors(c)); |
1c6fdbd8 KO |
796 | c->btree_foreground_merge_threshold = BTREE_FOREGROUND_MERGE_THRESHOLD(c); |
797 | ||
7be9ab63 | 798 | if (bch2_fs_init_fault("fs_alloc")) { |
e2b60560 KO |
799 | bch_err(c, "fs_alloc fault injected"); |
800 | ret = -EFAULT; | |
1c6fdbd8 | 801 | goto err; |
7be9ab63 | 802 | } |
1c6fdbd8 | 803 | |
ae2f17d5 | 804 | iter_size = sizeof(struct sort_iter) + |
1c6fdbd8 | 805 | (btree_blocks(c) + 1) * 2 * |
ae2f17d5 | 806 | sizeof(struct sort_iter_set); |
1c6fdbd8 | 807 | |
b5e8a699 KO |
808 | c->inode_shard_bits = ilog2(roundup_pow_of_two(num_possible_cpus())); |
809 | ||
731bdd2e | 810 | if (!(c->btree_update_wq = alloc_workqueue("bcachefs", |
b17d3cec | 811 | WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512)) || |
9f1833ca | 812 | !(c->btree_io_complete_wq = alloc_workqueue("bcachefs_btree_io", |
9f2772c4 | 813 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 1)) || |
2f33ece9 KO |
814 | !(c->copygc_wq = alloc_workqueue("bcachefs_copygc", |
815 | WQ_FREEZABLE|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 1)) || | |
731bdd2e KO |
816 | !(c->io_complete_wq = alloc_workqueue("bcachefs_io", |
817 | WQ_FREEZABLE|WQ_HIGHPRI|WQ_MEM_RECLAIM, 1)) || | |
8bff9875 BF |
818 | !(c->write_ref_wq = alloc_workqueue("bcachefs_write_ref", |
819 | WQ_FREEZABLE, 0)) || | |
d94189ad | 820 | #ifndef BCH_WRITE_REF_DEBUG |
134915f3 KO |
821 | percpu_ref_init(&c->writes, bch2_writes_disabled, |
822 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d94189ad | 823 | #endif |
1c6fdbd8 KO |
824 | mempool_init_kmalloc_pool(&c->fill_iter, 1, iter_size) || |
825 | bioset_init(&c->btree_bio, 1, | |
826 | max(offsetof(struct btree_read_bio, bio), | |
827 | offsetof(struct btree_write_bio, wbio.bio)), | |
828 | BIOSET_NEED_BVECS) || | |
5663a415 | 829 | !(c->pcpu = alloc_percpu(struct bch_fs_pcpu)) || |
5e82a9a1 | 830 | !(c->online_reserved = alloc_percpu(u64)) || |
67e0dd8f | 831 | !(c->btree_paths_bufs = alloc_percpu(struct btree_path_buf)) || |
1c6fdbd8 KO |
832 | mempool_init_kvpmalloc_pool(&c->btree_bounce_pool, 1, |
833 | btree_bytes(c)) || | |
35189e09 | 834 | mempool_init_kmalloc_pool(&c->large_bkey_pool, 1, 2048) || |
b5e8a699 | 835 | !(c->unused_inode_hints = kcalloc(1U << c->inode_shard_bits, |
e2b60560 | 836 | sizeof(u64), GFP_KERNEL))) { |
65d48e35 | 837 | ret = -BCH_ERR_ENOMEM_fs_other_alloc; |
7be9ab63 CW |
838 | goto err; |
839 | } | |
840 | ||
f3b8403e KO |
841 | ret = bch2_fs_counters_init(c) ?: |
842 | bch2_io_clock_init(&c->io_clock[READ]) ?: | |
e2b60560 KO |
843 | bch2_io_clock_init(&c->io_clock[WRITE]) ?: |
844 | bch2_fs_journal_init(&c->journal) ?: | |
845 | bch2_fs_replicas_init(c) ?: | |
846 | bch2_fs_btree_cache_init(c) ?: | |
847 | bch2_fs_btree_key_cache_init(&c->btree_key_cache) ?: | |
848 | bch2_fs_btree_iter_init(c) ?: | |
849 | bch2_fs_btree_interior_update_init(c) ?: | |
9b688da3 | 850 | bch2_fs_buckets_waiting_for_journal_init(c) ?: |
920e69bc | 851 | bch2_fs_btree_write_buffer_init(c) ?: |
e2b60560 KO |
852 | bch2_fs_subvolumes_init(c) ?: |
853 | bch2_fs_io_init(c) ?: | |
350175bf | 854 | bch2_fs_nocow_locking_init(c) ?: |
e2b60560 KO |
855 | bch2_fs_encryption_init(c) ?: |
856 | bch2_fs_compress_init(c) ?: | |
857 | bch2_fs_ec_init(c) ?: | |
dbbfca9f KO |
858 | bch2_fs_fsio_init(c) ?: |
859 | bch2_fs_fs_io_buffered_init(c); | |
860 | bch2_fs_fs_io_direct_init(c); | |
7be9ab63 | 861 | if (ret) |
1c6fdbd8 KO |
862 | goto err; |
863 | ||
864 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
865 | for (i = 0; i < c->sb.nr_devices; i++) | |
866 | if (bch2_dev_exists(c->disk_sb.sb, mi, i) && | |
7be9ab63 | 867 | bch2_dev_alloc(c, i)) { |
e2b60560 | 868 | ret = -EEXIST; |
1c6fdbd8 | 869 | goto err; |
7be9ab63 | 870 | } |
1c6fdbd8 | 871 | |
4b8f89af KO |
872 | bch2_journal_entry_res_resize(&c->journal, |
873 | &c->btree_root_journal_res, | |
874 | BTREE_ID_NR * (JSET_KEYS_U64s + BKEY_BTREE_PTR_U64s_MAX)); | |
875 | bch2_dev_usage_journal_reserve(c); | |
876 | bch2_journal_entry_res_resize(&c->journal, | |
877 | &c->clock_journal_res, | |
878 | (sizeof(struct jset_entry_clock) / sizeof(u64)) * 2); | |
879 | ||
1c6fdbd8 | 880 | mutex_lock(&bch_fs_list_lock); |
e2b60560 | 881 | ret = bch2_fs_online(c); |
1c6fdbd8 | 882 | mutex_unlock(&bch_fs_list_lock); |
e2b60560 KO |
883 | |
884 | if (ret) | |
1c6fdbd8 | 885 | goto err; |
1c6fdbd8 | 886 | out: |
1c6fdbd8 KO |
887 | return c; |
888 | err: | |
889 | bch2_fs_free(c); | |
7be9ab63 | 890 | c = ERR_PTR(ret); |
1c6fdbd8 KO |
891 | goto out; |
892 | } | |
893 | ||
619f5bee KO |
894 | noinline_for_stack |
895 | static void print_mount_opts(struct bch_fs *c) | |
896 | { | |
897 | enum bch_opt_id i; | |
fa8e94fa | 898 | struct printbuf p = PRINTBUF; |
619f5bee KO |
899 | bool first = true; |
900 | ||
ef1634f0 | 901 | prt_str(&p, "mounting version "); |
e3804b55 | 902 | bch2_version_to_text(&p, c->sb.version); |
60573ff5 | 903 | |
619f5bee | 904 | if (c->opts.read_only) { |
60573ff5 | 905 | prt_str(&p, " opts="); |
619f5bee | 906 | first = false; |
60573ff5 | 907 | prt_printf(&p, "ro"); |
619f5bee KO |
908 | } |
909 | ||
910 | for (i = 0; i < bch2_opts_nr; i++) { | |
911 | const struct bch_option *opt = &bch2_opt_table[i]; | |
912 | u64 v = bch2_opt_get_by_id(&c->opts, i); | |
913 | ||
8244f320 | 914 | if (!(opt->flags & OPT_MOUNT)) |
619f5bee KO |
915 | continue; |
916 | ||
917 | if (v == bch2_opt_get_by_id(&bch2_opts_default, i)) | |
918 | continue; | |
919 | ||
60573ff5 | 920 | prt_str(&p, first ? " opts=" : ","); |
619f5bee | 921 | first = false; |
5521b1df | 922 | bch2_opt_to_text(&p, c, c->disk_sb.sb, opt, v, OPT_SHOW_MOUNT_STYLE); |
619f5bee KO |
923 | } |
924 | ||
60573ff5 | 925 | bch_info(c, "%s", p.buf); |
fa8e94fa | 926 | printbuf_exit(&p); |
619f5bee KO |
927 | } |
928 | ||
929 | int bch2_fs_start(struct bch_fs *c) | |
1c6fdbd8 | 930 | { |
1c6fdbd8 KO |
931 | struct bch_sb_field_members *mi; |
932 | struct bch_dev *ca; | |
a420eea6 | 933 | time64_t now = ktime_get_real_seconds(); |
1c6fdbd8 | 934 | unsigned i; |
78c0b75c | 935 | int ret; |
1c6fdbd8 | 936 | |
ef1634f0 KO |
937 | print_mount_opts(c); |
938 | ||
1ada1606 | 939 | down_write(&c->state_lock); |
1c6fdbd8 | 940 | |
134915f3 | 941 | BUG_ON(test_bit(BCH_FS_STARTED, &c->flags)); |
1c6fdbd8 KO |
942 | |
943 | mutex_lock(&c->sb_lock); | |
944 | ||
945 | for_each_online_member(ca, c, i) | |
946 | bch2_sb_from_fs(c, ca); | |
947 | ||
948 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
949 | for_each_online_member(ca, c, i) | |
950 | mi->members[ca->dev_idx].last_mount = cpu_to_le64(now); | |
951 | ||
952 | mutex_unlock(&c->sb_lock); | |
953 | ||
954 | for_each_rw_member(ca, c, i) | |
955 | bch2_dev_allocator_add(c, ca); | |
956 | bch2_recalc_capacity(c); | |
957 | ||
bf8f8b20 DH |
958 | for (i = 0; i < BCH_TRANSACTIONS_NR; i++) { |
959 | mutex_lock(&c->btree_transaction_stats[i].lock); | |
960 | bch2_time_stats_init(&c->btree_transaction_stats[i].lock_hold_times); | |
961 | mutex_unlock(&c->btree_transaction_stats[i].lock); | |
962 | } | |
963 | ||
1c6fdbd8 KO |
964 | ret = BCH_SB_INITIALIZED(c->disk_sb.sb) |
965 | ? bch2_fs_recovery(c) | |
966 | : bch2_fs_initialize(c); | |
967 | if (ret) | |
968 | goto err; | |
cd575ddf KO |
969 | |
970 | ret = bch2_opts_check_may_set(c); | |
971 | if (ret) | |
972 | goto err; | |
1c6fdbd8 | 973 | |
e2b60560 KO |
974 | if (bch2_fs_init_fault("fs_start")) { |
975 | bch_err(c, "fs_start fault injected"); | |
78c0b75c | 976 | ret = -EINVAL; |
1c6fdbd8 | 977 | goto err; |
e2b60560 | 978 | } |
1c6fdbd8 | 979 | |
a9310ab0 KO |
980 | set_bit(BCH_FS_STARTED, &c->flags); |
981 | ||
619f5bee | 982 | if (c->opts.read_only || c->opts.nochanges) { |
1c6fdbd8 KO |
983 | bch2_fs_read_only(c); |
984 | } else { | |
619f5bee KO |
985 | ret = !test_bit(BCH_FS_RW, &c->flags) |
986 | ? bch2_fs_read_write(c) | |
987 | : bch2_fs_read_write_late(c); | |
988 | if (ret) | |
1c6fdbd8 KO |
989 | goto err; |
990 | } | |
991 | ||
619f5bee | 992 | ret = 0; |
1c6fdbd8 | 993 | out: |
1ada1606 | 994 | up_write(&c->state_lock); |
619f5bee | 995 | return ret; |
1c6fdbd8 | 996 | err: |
1ed0a5d2 | 997 | bch_err(c, "error starting filesystem: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
998 | goto out; |
999 | } | |
1000 | ||
78c0b75c | 1001 | static int bch2_dev_may_add(struct bch_sb *sb, struct bch_fs *c) |
1c6fdbd8 KO |
1002 | { |
1003 | struct bch_sb_field_members *sb_mi; | |
1004 | ||
1005 | sb_mi = bch2_sb_get_members(sb); | |
1006 | if (!sb_mi) | |
78c0b75c | 1007 | return -BCH_ERR_member_info_missing; |
1c6fdbd8 | 1008 | |
8244f320 | 1009 | if (le16_to_cpu(sb->block_size) != block_sectors(c)) |
78c0b75c | 1010 | return -BCH_ERR_mismatched_block_size; |
1c6fdbd8 KO |
1011 | |
1012 | if (le16_to_cpu(sb_mi->members[sb->dev_idx].bucket_size) < | |
1013 | BCH_SB_BTREE_NODE_SIZE(c->disk_sb.sb)) | |
78c0b75c | 1014 | return -BCH_ERR_bucket_size_too_small; |
1c6fdbd8 | 1015 | |
78c0b75c | 1016 | return 0; |
1c6fdbd8 KO |
1017 | } |
1018 | ||
78c0b75c | 1019 | static int bch2_dev_in_fs(struct bch_sb *fs, struct bch_sb *sb) |
1c6fdbd8 KO |
1020 | { |
1021 | struct bch_sb *newest = | |
1022 | le64_to_cpu(fs->seq) > le64_to_cpu(sb->seq) ? fs : sb; | |
1023 | struct bch_sb_field_members *mi = bch2_sb_get_members(newest); | |
1024 | ||
1025 | if (!uuid_equal(&fs->uuid, &sb->uuid)) | |
78c0b75c | 1026 | return -BCH_ERR_device_not_a_member_of_filesystem; |
1c6fdbd8 KO |
1027 | |
1028 | if (!bch2_dev_exists(newest, mi, sb->dev_idx)) | |
78c0b75c | 1029 | return -BCH_ERR_device_has_been_removed; |
1c6fdbd8 KO |
1030 | |
1031 | if (fs->block_size != sb->block_size) | |
78c0b75c | 1032 | return -BCH_ERR_mismatched_block_size; |
1c6fdbd8 | 1033 | |
78c0b75c | 1034 | return 0; |
1c6fdbd8 KO |
1035 | } |
1036 | ||
1037 | /* Device startup/shutdown: */ | |
1038 | ||
1039 | static void bch2_dev_release(struct kobject *kobj) | |
1040 | { | |
1041 | struct bch_dev *ca = container_of(kobj, struct bch_dev, kobj); | |
1042 | ||
1043 | kfree(ca); | |
1044 | } | |
1045 | ||
1046 | static void bch2_dev_free(struct bch_dev *ca) | |
1047 | { | |
1048 | cancel_work_sync(&ca->io_error_work); | |
1049 | ||
1050 | if (ca->kobj.state_in_sysfs && | |
1051 | ca->disk_sb.bdev) | |
1052 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1053 | ||
1054 | if (ca->kobj.state_in_sysfs) | |
1055 | kobject_del(&ca->kobj); | |
1056 | ||
1057 | bch2_free_super(&ca->disk_sb); | |
1058 | bch2_dev_journal_exit(ca); | |
1059 | ||
1060 | free_percpu(ca->io_done); | |
1061 | bioset_exit(&ca->replica_set); | |
1062 | bch2_dev_buckets_free(ca); | |
d1170ce5 | 1063 | free_page((unsigned long) ca->sb_read_scratch); |
1c6fdbd8 KO |
1064 | |
1065 | bch2_time_stats_exit(&ca->io_latency[WRITE]); | |
1066 | bch2_time_stats_exit(&ca->io_latency[READ]); | |
1067 | ||
1068 | percpu_ref_exit(&ca->io_ref); | |
1069 | percpu_ref_exit(&ca->ref); | |
1070 | kobject_put(&ca->kobj); | |
1071 | } | |
1072 | ||
1073 | static void __bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca) | |
1074 | { | |
1075 | ||
1076 | lockdep_assert_held(&c->state_lock); | |
1077 | ||
1078 | if (percpu_ref_is_zero(&ca->io_ref)) | |
1079 | return; | |
1080 | ||
1081 | __bch2_dev_read_only(c, ca); | |
1082 | ||
1083 | reinit_completion(&ca->io_ref_completion); | |
1084 | percpu_ref_kill(&ca->io_ref); | |
1085 | wait_for_completion(&ca->io_ref_completion); | |
1086 | ||
1087 | if (ca->kobj.state_in_sysfs) { | |
1088 | sysfs_remove_link(bdev_kobj(ca->disk_sb.bdev), "bcachefs"); | |
1089 | sysfs_remove_link(&ca->kobj, "block"); | |
1090 | } | |
1091 | ||
1092 | bch2_free_super(&ca->disk_sb); | |
1093 | bch2_dev_journal_exit(ca); | |
1094 | } | |
1095 | ||
1096 | static void bch2_dev_ref_complete(struct percpu_ref *ref) | |
1097 | { | |
1098 | struct bch_dev *ca = container_of(ref, struct bch_dev, ref); | |
1099 | ||
1100 | complete(&ca->ref_completion); | |
1101 | } | |
1102 | ||
1103 | static void bch2_dev_io_ref_complete(struct percpu_ref *ref) | |
1104 | { | |
1105 | struct bch_dev *ca = container_of(ref, struct bch_dev, io_ref); | |
1106 | ||
1107 | complete(&ca->io_ref_completion); | |
1108 | } | |
1109 | ||
1110 | static int bch2_dev_sysfs_online(struct bch_fs *c, struct bch_dev *ca) | |
1111 | { | |
1112 | int ret; | |
1113 | ||
1114 | if (!c->kobj.state_in_sysfs) | |
1115 | return 0; | |
1116 | ||
1117 | if (!ca->kobj.state_in_sysfs) { | |
1118 | ret = kobject_add(&ca->kobj, &c->kobj, | |
1119 | "dev-%u", ca->dev_idx); | |
1120 | if (ret) | |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | if (ca->disk_sb.bdev) { | |
1125 | struct kobject *block = bdev_kobj(ca->disk_sb.bdev); | |
1126 | ||
1127 | ret = sysfs_create_link(block, &ca->kobj, "bcachefs"); | |
1128 | if (ret) | |
1129 | return ret; | |
1130 | ||
1131 | ret = sysfs_create_link(&ca->kobj, block, "block"); | |
1132 | if (ret) | |
1133 | return ret; | |
1134 | } | |
1135 | ||
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | static struct bch_dev *__bch2_dev_alloc(struct bch_fs *c, | |
1140 | struct bch_member *member) | |
1141 | { | |
1142 | struct bch_dev *ca; | |
1143 | ||
1144 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); | |
1145 | if (!ca) | |
1146 | return NULL; | |
1147 | ||
1148 | kobject_init(&ca->kobj, &bch2_dev_ktype); | |
1149 | init_completion(&ca->ref_completion); | |
1150 | init_completion(&ca->io_ref_completion); | |
1151 | ||
1152 | init_rwsem(&ca->bucket_lock); | |
1153 | ||
1c6fdbd8 KO |
1154 | INIT_WORK(&ca->io_error_work, bch2_io_error_work); |
1155 | ||
1156 | bch2_time_stats_init(&ca->io_latency[READ]); | |
1157 | bch2_time_stats_init(&ca->io_latency[WRITE]); | |
1158 | ||
1159 | ca->mi = bch2_mi_to_cpu(member); | |
1160 | ca->uuid = member->uuid; | |
1161 | ||
f25d8215 KO |
1162 | ca->nr_btree_reserve = DIV_ROUND_UP(BTREE_NODE_RESERVE, |
1163 | ca->mi.bucket_size / btree_sectors(c)); | |
1164 | ||
1c6fdbd8 KO |
1165 | if (percpu_ref_init(&ca->ref, bch2_dev_ref_complete, |
1166 | 0, GFP_KERNEL) || | |
1167 | percpu_ref_init(&ca->io_ref, bch2_dev_io_ref_complete, | |
1168 | PERCPU_REF_INIT_DEAD, GFP_KERNEL) || | |
d1170ce5 | 1169 | !(ca->sb_read_scratch = (void *) __get_free_page(GFP_KERNEL)) || |
1c6fdbd8 KO |
1170 | bch2_dev_buckets_alloc(c, ca) || |
1171 | bioset_init(&ca->replica_set, 4, | |
1172 | offsetof(struct bch_write_bio, bio), 0) || | |
1173 | !(ca->io_done = alloc_percpu(*ca->io_done))) | |
1174 | goto err; | |
1175 | ||
1176 | return ca; | |
1177 | err: | |
1178 | bch2_dev_free(ca); | |
1179 | return NULL; | |
1180 | } | |
1181 | ||
1182 | static void bch2_dev_attach(struct bch_fs *c, struct bch_dev *ca, | |
1183 | unsigned dev_idx) | |
1184 | { | |
1185 | ca->dev_idx = dev_idx; | |
1186 | __set_bit(ca->dev_idx, ca->self.d); | |
1187 | scnprintf(ca->name, sizeof(ca->name), "dev-%u", dev_idx); | |
1188 | ||
1189 | ca->fs = c; | |
1190 | rcu_assign_pointer(c->devs[ca->dev_idx], ca); | |
1191 | ||
1192 | if (bch2_dev_sysfs_online(c, ca)) | |
1193 | pr_warn("error creating sysfs objects"); | |
1194 | } | |
1195 | ||
1196 | static int bch2_dev_alloc(struct bch_fs *c, unsigned dev_idx) | |
1197 | { | |
1198 | struct bch_member *member = | |
1199 | bch2_sb_get_members(c->disk_sb.sb)->members + dev_idx; | |
1200 | struct bch_dev *ca = NULL; | |
1201 | int ret = 0; | |
1202 | ||
1c6fdbd8 KO |
1203 | if (bch2_fs_init_fault("dev_alloc")) |
1204 | goto err; | |
1205 | ||
1206 | ca = __bch2_dev_alloc(c, member); | |
1207 | if (!ca) | |
1208 | goto err; | |
1209 | ||
220d2062 KO |
1210 | ca->fs = c; |
1211 | ||
1c6fdbd8 | 1212 | bch2_dev_attach(c, ca, dev_idx); |
1c6fdbd8 KO |
1213 | return ret; |
1214 | err: | |
1215 | if (ca) | |
1216 | bch2_dev_free(ca); | |
c8b4534d | 1217 | return -BCH_ERR_ENOMEM_dev_alloc; |
1c6fdbd8 KO |
1218 | } |
1219 | ||
1220 | static int __bch2_dev_attach_bdev(struct bch_dev *ca, struct bch_sb_handle *sb) | |
1221 | { | |
1222 | unsigned ret; | |
1223 | ||
1224 | if (bch2_dev_is_online(ca)) { | |
1225 | bch_err(ca, "already have device online in slot %u", | |
1226 | sb->sb->dev_idx); | |
78c0b75c | 1227 | return -BCH_ERR_device_already_online; |
1c6fdbd8 KO |
1228 | } |
1229 | ||
1230 | if (get_capacity(sb->bdev->bd_disk) < | |
1231 | ca->mi.bucket_size * ca->mi.nbuckets) { | |
1232 | bch_err(ca, "cannot online: device too small"); | |
78c0b75c | 1233 | return -BCH_ERR_device_size_too_small; |
1c6fdbd8 KO |
1234 | } |
1235 | ||
1236 | BUG_ON(!percpu_ref_is_zero(&ca->io_ref)); | |
1237 | ||
1c6fdbd8 KO |
1238 | ret = bch2_dev_journal_init(ca, sb->sb); |
1239 | if (ret) | |
1240 | return ret; | |
1241 | ||
1242 | /* Commit: */ | |
1243 | ca->disk_sb = *sb; | |
1244 | memset(sb, 0, sizeof(*sb)); | |
1245 | ||
eacb2574 KO |
1246 | ca->dev = ca->disk_sb.bdev->bd_dev; |
1247 | ||
1c6fdbd8 KO |
1248 | percpu_ref_reinit(&ca->io_ref); |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | static int bch2_dev_attach_bdev(struct bch_fs *c, struct bch_sb_handle *sb) | |
1254 | { | |
1255 | struct bch_dev *ca; | |
1256 | int ret; | |
1257 | ||
1258 | lockdep_assert_held(&c->state_lock); | |
1259 | ||
1260 | if (le64_to_cpu(sb->sb->seq) > | |
1261 | le64_to_cpu(c->disk_sb.sb->seq)) | |
1262 | bch2_sb_to_fs(c, sb->sb); | |
1263 | ||
1264 | BUG_ON(sb->sb->dev_idx >= c->sb.nr_devices || | |
1265 | !c->devs[sb->sb->dev_idx]); | |
1266 | ||
1267 | ca = bch_dev_locked(c, sb->sb->dev_idx); | |
1268 | ||
1269 | ret = __bch2_dev_attach_bdev(ca, sb); | |
1270 | if (ret) | |
1271 | return ret; | |
1272 | ||
1273 | bch2_dev_sysfs_online(c, ca); | |
1274 | ||
1275 | if (c->sb.nr_devices == 1) | |
1276 | snprintf(c->name, sizeof(c->name), "%pg", ca->disk_sb.bdev); | |
1277 | snprintf(ca->name, sizeof(ca->name), "%pg", ca->disk_sb.bdev); | |
1278 | ||
1279 | rebalance_wakeup(c); | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | /* Device management: */ | |
1284 | ||
1285 | /* | |
1286 | * Note: this function is also used by the error paths - when a particular | |
1287 | * device sees an error, we call it to determine whether we can just set the | |
1288 | * device RO, or - if this function returns false - we'll set the whole | |
1289 | * filesystem RO: | |
1290 | * | |
1291 | * XXX: maybe we should be more explicit about whether we're changing state | |
1292 | * because we got an error or what have you? | |
1293 | */ | |
1294 | bool bch2_dev_state_allowed(struct bch_fs *c, struct bch_dev *ca, | |
1295 | enum bch_member_state new_state, int flags) | |
1296 | { | |
1297 | struct bch_devs_mask new_online_devs; | |
1c6fdbd8 KO |
1298 | struct bch_dev *ca2; |
1299 | int i, nr_rw = 0, required; | |
1300 | ||
1301 | lockdep_assert_held(&c->state_lock); | |
1302 | ||
1303 | switch (new_state) { | |
2436cb9f | 1304 | case BCH_MEMBER_STATE_rw: |
1c6fdbd8 | 1305 | return true; |
2436cb9f KO |
1306 | case BCH_MEMBER_STATE_ro: |
1307 | if (ca->mi.state != BCH_MEMBER_STATE_rw) | |
1c6fdbd8 KO |
1308 | return true; |
1309 | ||
1310 | /* do we have enough devices to write to? */ | |
1311 | for_each_member_device(ca2, c, i) | |
1312 | if (ca2 != ca) | |
2436cb9f | 1313 | nr_rw += ca2->mi.state == BCH_MEMBER_STATE_rw; |
1c6fdbd8 KO |
1314 | |
1315 | required = max(!(flags & BCH_FORCE_IF_METADATA_DEGRADED) | |
1316 | ? c->opts.metadata_replicas | |
1317 | : c->opts.metadata_replicas_required, | |
1318 | !(flags & BCH_FORCE_IF_DATA_DEGRADED) | |
1319 | ? c->opts.data_replicas | |
1320 | : c->opts.data_replicas_required); | |
1321 | ||
1322 | return nr_rw >= required; | |
2436cb9f KO |
1323 | case BCH_MEMBER_STATE_failed: |
1324 | case BCH_MEMBER_STATE_spare: | |
1325 | if (ca->mi.state != BCH_MEMBER_STATE_rw && | |
1326 | ca->mi.state != BCH_MEMBER_STATE_ro) | |
1c6fdbd8 KO |
1327 | return true; |
1328 | ||
1329 | /* do we have enough devices to read from? */ | |
1330 | new_online_devs = bch2_online_devs(c); | |
1331 | __clear_bit(ca->dev_idx, new_online_devs.d); | |
1332 | ||
fcb3431b | 1333 | return bch2_have_enough_devs(c, new_online_devs, flags, false); |
1c6fdbd8 KO |
1334 | default: |
1335 | BUG(); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | static bool bch2_fs_may_start(struct bch_fs *c) | |
1340 | { | |
1c6fdbd8 KO |
1341 | struct bch_sb_field_members *mi; |
1342 | struct bch_dev *ca; | |
fcb3431b KO |
1343 | unsigned i, flags = 0; |
1344 | ||
1345 | if (c->opts.very_degraded) | |
1346 | flags |= BCH_FORCE_IF_DEGRADED|BCH_FORCE_IF_LOST; | |
1c6fdbd8 | 1347 | |
fcb3431b KO |
1348 | if (c->opts.degraded) |
1349 | flags |= BCH_FORCE_IF_DEGRADED; | |
1350 | ||
1351 | if (!c->opts.degraded && | |
1352 | !c->opts.very_degraded) { | |
1c6fdbd8 KO |
1353 | mutex_lock(&c->sb_lock); |
1354 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1355 | ||
1356 | for (i = 0; i < c->disk_sb.sb->nr_devices; i++) { | |
1357 | if (!bch2_dev_exists(c->disk_sb.sb, mi, i)) | |
1358 | continue; | |
1359 | ||
1360 | ca = bch_dev_locked(c, i); | |
1361 | ||
1362 | if (!bch2_dev_is_online(ca) && | |
2436cb9f KO |
1363 | (ca->mi.state == BCH_MEMBER_STATE_rw || |
1364 | ca->mi.state == BCH_MEMBER_STATE_ro)) { | |
1c6fdbd8 KO |
1365 | mutex_unlock(&c->sb_lock); |
1366 | return false; | |
1367 | } | |
1368 | } | |
1369 | mutex_unlock(&c->sb_lock); | |
1370 | } | |
1371 | ||
fcb3431b | 1372 | return bch2_have_enough_devs(c, bch2_online_devs(c), flags, true); |
1c6fdbd8 KO |
1373 | } |
1374 | ||
1375 | static void __bch2_dev_read_only(struct bch_fs *c, struct bch_dev *ca) | |
1376 | { | |
1c6fdbd8 KO |
1377 | /* |
1378 | * The allocator thread itself allocates btree nodes, so stop it first: | |
1379 | */ | |
1c6fdbd8 KO |
1380 | bch2_dev_allocator_remove(c, ca); |
1381 | bch2_dev_journal_stop(&c->journal, ca); | |
1382 | } | |
1383 | ||
f25d8215 | 1384 | static void __bch2_dev_read_write(struct bch_fs *c, struct bch_dev *ca) |
1c6fdbd8 KO |
1385 | { |
1386 | lockdep_assert_held(&c->state_lock); | |
1387 | ||
2436cb9f | 1388 | BUG_ON(ca->mi.state != BCH_MEMBER_STATE_rw); |
1c6fdbd8 KO |
1389 | |
1390 | bch2_dev_allocator_add(c, ca); | |
1391 | bch2_recalc_capacity(c); | |
1c6fdbd8 KO |
1392 | } |
1393 | ||
1394 | int __bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1395 | enum bch_member_state new_state, int flags) | |
1396 | { | |
1397 | struct bch_sb_field_members *mi; | |
1398 | int ret = 0; | |
1399 | ||
1400 | if (ca->mi.state == new_state) | |
1401 | return 0; | |
1402 | ||
1403 | if (!bch2_dev_state_allowed(c, ca, new_state, flags)) | |
78c0b75c | 1404 | return -BCH_ERR_device_state_not_allowed; |
1c6fdbd8 | 1405 | |
2436cb9f | 1406 | if (new_state != BCH_MEMBER_STATE_rw) |
1c6fdbd8 KO |
1407 | __bch2_dev_read_only(c, ca); |
1408 | ||
2436cb9f | 1409 | bch_notice(ca, "%s", bch2_member_states[new_state]); |
1c6fdbd8 KO |
1410 | |
1411 | mutex_lock(&c->sb_lock); | |
1412 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1413 | SET_BCH_MEMBER_STATE(&mi->members[ca->dev_idx], new_state); | |
1414 | bch2_write_super(c); | |
1415 | mutex_unlock(&c->sb_lock); | |
1416 | ||
e2b60560 | 1417 | if (new_state == BCH_MEMBER_STATE_rw) |
f25d8215 | 1418 | __bch2_dev_read_write(c, ca); |
1c6fdbd8 KO |
1419 | |
1420 | rebalance_wakeup(c); | |
1421 | ||
1422 | return ret; | |
1423 | } | |
1424 | ||
1425 | int bch2_dev_set_state(struct bch_fs *c, struct bch_dev *ca, | |
1426 | enum bch_member_state new_state, int flags) | |
1427 | { | |
1428 | int ret; | |
1429 | ||
1ada1606 | 1430 | down_write(&c->state_lock); |
1c6fdbd8 | 1431 | ret = __bch2_dev_set_state(c, ca, new_state, flags); |
1ada1606 | 1432 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1433 | |
1434 | return ret; | |
1435 | } | |
1436 | ||
1437 | /* Device add/removal: */ | |
1438 | ||
c0ebe3e4 | 1439 | static int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca) |
5d20ba48 | 1440 | { |
c6b2826c KO |
1441 | struct bpos start = POS(ca->dev_idx, 0); |
1442 | struct bpos end = POS(ca->dev_idx, U64_MAX); | |
5d20ba48 KO |
1443 | int ret; |
1444 | ||
a9c0a4cb KO |
1445 | /* |
1446 | * We clear the LRU and need_discard btrees first so that we don't race | |
1447 | * with bch2_do_invalidates() and bch2_do_discards() | |
1448 | */ | |
1449 | ret = bch2_btree_delete_range(c, BTREE_ID_lru, start, end, | |
1450 | BTREE_TRIGGER_NORUN, NULL) ?: | |
1451 | bch2_btree_delete_range(c, BTREE_ID_need_discard, start, end, | |
c6b2826c KO |
1452 | BTREE_TRIGGER_NORUN, NULL) ?: |
1453 | bch2_btree_delete_range(c, BTREE_ID_freespace, start, end, | |
1454 | BTREE_TRIGGER_NORUN, NULL) ?: | |
a8c752bb KO |
1455 | bch2_btree_delete_range(c, BTREE_ID_backpointers, start, end, |
1456 | BTREE_TRIGGER_NORUN, NULL) ?: | |
a9c0a4cb | 1457 | bch2_btree_delete_range(c, BTREE_ID_alloc, start, end, |
02d51bb9 BF |
1458 | BTREE_TRIGGER_NORUN, NULL) ?: |
1459 | bch2_btree_delete_range(c, BTREE_ID_bucket_gens, start, end, | |
c6b2826c KO |
1460 | BTREE_TRIGGER_NORUN, NULL); |
1461 | if (ret) | |
d4bf5eec | 1462 | bch_err(c, "error removing dev alloc info: %s", bch2_err_str(ret)); |
5d20ba48 | 1463 | |
c6b2826c | 1464 | return ret; |
5d20ba48 KO |
1465 | } |
1466 | ||
1c6fdbd8 KO |
1467 | int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags) |
1468 | { | |
1469 | struct bch_sb_field_members *mi; | |
1470 | unsigned dev_idx = ca->dev_idx, data; | |
78c0b75c | 1471 | int ret; |
1c6fdbd8 | 1472 | |
1ada1606 | 1473 | down_write(&c->state_lock); |
1c6fdbd8 | 1474 | |
31ba2cd3 KO |
1475 | /* |
1476 | * We consume a reference to ca->ref, regardless of whether we succeed | |
1477 | * or fail: | |
1478 | */ | |
1479 | percpu_ref_put(&ca->ref); | |
1c6fdbd8 | 1480 | |
2436cb9f | 1481 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) { |
1c6fdbd8 | 1482 | bch_err(ca, "Cannot remove without losing data"); |
78c0b75c | 1483 | ret = -BCH_ERR_device_state_not_allowed; |
1c6fdbd8 KO |
1484 | goto err; |
1485 | } | |
1486 | ||
1487 | __bch2_dev_read_only(c, ca); | |
1488 | ||
1c6fdbd8 KO |
1489 | ret = bch2_dev_data_drop(c, ca->dev_idx, flags); |
1490 | if (ret) { | |
d4bf5eec | 1491 | bch_err(ca, "Remove failed: error dropping data: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
1492 | goto err; |
1493 | } | |
1494 | ||
a9c0a4cb | 1495 | ret = bch2_dev_remove_alloc(c, ca); |
1c6fdbd8 | 1496 | if (ret) { |
a9c0a4cb | 1497 | bch_err(ca, "Remove failed, error deleting alloc info"); |
1c6fdbd8 KO |
1498 | goto err; |
1499 | } | |
1500 | ||
a9c0a4cb | 1501 | ret = bch2_journal_flush_device_pins(&c->journal, ca->dev_idx); |
1c6fdbd8 | 1502 | if (ret) { |
d4bf5eec | 1503 | bch_err(ca, "Remove failed: error flushing journal: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
1504 | goto err; |
1505 | } | |
1506 | ||
a9c0a4cb | 1507 | ret = bch2_journal_flush(&c->journal); |
1c6fdbd8 KO |
1508 | if (ret) { |
1509 | bch_err(ca, "Remove failed, journal error"); | |
1510 | goto err; | |
1511 | } | |
1512 | ||
31ba2cd3 KO |
1513 | ret = bch2_replicas_gc2(c); |
1514 | if (ret) { | |
d4bf5eec | 1515 | bch_err(ca, "Remove failed: error from replicas gc: %s", bch2_err_str(ret)); |
31ba2cd3 KO |
1516 | goto err; |
1517 | } | |
1518 | ||
1519 | data = bch2_dev_has_data(c, ca); | |
1520 | if (data) { | |
fa8e94fa | 1521 | struct printbuf data_has = PRINTBUF; |
31ba2cd3 | 1522 | |
401ec4db | 1523 | prt_bitflags(&data_has, bch2_data_types, data); |
fa8e94fa KO |
1524 | bch_err(ca, "Remove failed, still has data (%s)", data_has.buf); |
1525 | printbuf_exit(&data_has); | |
31ba2cd3 KO |
1526 | ret = -EBUSY; |
1527 | goto err; | |
1528 | } | |
1529 | ||
1c6fdbd8 KO |
1530 | __bch2_dev_offline(c, ca); |
1531 | ||
1532 | mutex_lock(&c->sb_lock); | |
1533 | rcu_assign_pointer(c->devs[ca->dev_idx], NULL); | |
1534 | mutex_unlock(&c->sb_lock); | |
1535 | ||
1536 | percpu_ref_kill(&ca->ref); | |
1537 | wait_for_completion(&ca->ref_completion); | |
1538 | ||
1539 | bch2_dev_free(ca); | |
1540 | ||
bc652905 BF |
1541 | /* |
1542 | * At this point the device object has been removed in-core, but the | |
1543 | * on-disk journal might still refer to the device index via sb device | |
1544 | * usage entries. Recovery fails if it sees usage information for an | |
1545 | * invalid device. Flush journal pins to push the back of the journal | |
1546 | * past now invalid device index references before we update the | |
1547 | * superblock, but after the device object has been removed so any | |
1548 | * further journal writes elide usage info for the device. | |
1549 | */ | |
1550 | bch2_journal_flush_all_pins(&c->journal); | |
1551 | ||
1c6fdbd8 KO |
1552 | /* |
1553 | * Free this device's slot in the bch_member array - all pointers to | |
1554 | * this device must be gone: | |
1555 | */ | |
1556 | mutex_lock(&c->sb_lock); | |
1557 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1558 | memset(&mi->members[dev_idx].uuid, 0, sizeof(mi->members[dev_idx].uuid)); | |
1559 | ||
1560 | bch2_write_super(c); | |
1561 | ||
1562 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1563 | up_write(&c->state_lock); |
180fb49d KO |
1564 | |
1565 | bch2_dev_usage_journal_reserve(c); | |
1c6fdbd8 KO |
1566 | return 0; |
1567 | err: | |
2436cb9f | 1568 | if (ca->mi.state == BCH_MEMBER_STATE_rw && |
d3bb629d | 1569 | !percpu_ref_is_zero(&ca->io_ref)) |
1c6fdbd8 | 1570 | __bch2_dev_read_write(c, ca); |
1ada1606 | 1571 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1572 | return ret; |
1573 | } | |
1574 | ||
1575 | /* Add new device to running filesystem: */ | |
1576 | int bch2_dev_add(struct bch_fs *c, const char *path) | |
1577 | { | |
1578 | struct bch_opts opts = bch2_opts_empty(); | |
1579 | struct bch_sb_handle sb; | |
1c6fdbd8 KO |
1580 | struct bch_dev *ca = NULL; |
1581 | struct bch_sb_field_members *mi; | |
1582 | struct bch_member dev_mi; | |
1583 | unsigned dev_idx, nr_devices, u64s; | |
fa8e94fa | 1584 | struct printbuf errbuf = PRINTBUF; |
02afcb8c | 1585 | struct printbuf label = PRINTBUF; |
1c6fdbd8 KO |
1586 | int ret; |
1587 | ||
1588 | ret = bch2_read_super(path, &opts, &sb); | |
e8536925 | 1589 | if (ret) { |
d4bf5eec | 1590 | bch_err(c, "device add error: error reading super: %s", bch2_err_str(ret)); |
efe68e1d | 1591 | goto err; |
e8536925 | 1592 | } |
1c6fdbd8 KO |
1593 | |
1594 | dev_mi = bch2_sb_get_members(sb.sb)->members[sb.sb->dev_idx]; | |
1595 | ||
02afcb8c KO |
1596 | if (BCH_MEMBER_GROUP(&dev_mi)) { |
1597 | bch2_disk_path_to_text(&label, sb.sb, BCH_MEMBER_GROUP(&dev_mi) - 1); | |
1598 | if (label.allocation_failure) { | |
1599 | ret = -ENOMEM; | |
1600 | goto err; | |
1601 | } | |
1602 | } | |
1603 | ||
78c0b75c KO |
1604 | ret = bch2_dev_may_add(sb.sb, c); |
1605 | if (ret) { | |
1606 | bch_err(c, "device add error: %s", bch2_err_str(ret)); | |
efe68e1d | 1607 | goto err; |
e8536925 | 1608 | } |
1c6fdbd8 KO |
1609 | |
1610 | ca = __bch2_dev_alloc(c, &dev_mi); | |
1611 | if (!ca) { | |
1612 | bch2_free_super(&sb); | |
efe68e1d KO |
1613 | ret = -ENOMEM; |
1614 | goto err; | |
1c6fdbd8 KO |
1615 | } |
1616 | ||
822835ff KO |
1617 | bch2_dev_usage_init(ca); |
1618 | ||
1c6fdbd8 KO |
1619 | ret = __bch2_dev_attach_bdev(ca, &sb); |
1620 | if (ret) { | |
1621 | bch2_dev_free(ca); | |
efe68e1d | 1622 | goto err; |
1c6fdbd8 KO |
1623 | } |
1624 | ||
1c6fdbd8 | 1625 | ret = bch2_dev_journal_alloc(ca); |
e8536925 KO |
1626 | if (ret) { |
1627 | bch_err(c, "device add error: journal alloc failed"); | |
1c6fdbd8 | 1628 | goto err; |
e8536925 | 1629 | } |
1c6fdbd8 | 1630 | |
1ada1606 | 1631 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1632 | mutex_lock(&c->sb_lock); |
1633 | ||
1c6fdbd8 | 1634 | ret = bch2_sb_from_fs(c, ca); |
e8536925 KO |
1635 | if (ret) { |
1636 | bch_err(c, "device add error: new device superblock too small"); | |
1c6fdbd8 | 1637 | goto err_unlock; |
e8536925 | 1638 | } |
1c6fdbd8 KO |
1639 | |
1640 | mi = bch2_sb_get_members(ca->disk_sb.sb); | |
1641 | ||
1642 | if (!bch2_sb_resize_members(&ca->disk_sb, | |
1643 | le32_to_cpu(mi->field.u64s) + | |
1644 | sizeof(dev_mi) / sizeof(u64))) { | |
e8536925 | 1645 | bch_err(c, "device add error: new device superblock too small"); |
098ef98d | 1646 | ret = -BCH_ERR_ENOSPC_sb_members; |
1c6fdbd8 KO |
1647 | goto err_unlock; |
1648 | } | |
1649 | ||
1650 | if (dynamic_fault("bcachefs:add:no_slot")) | |
1651 | goto no_slot; | |
1652 | ||
1653 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1654 | for (dev_idx = 0; dev_idx < BCH_SB_MEMBERS_MAX; dev_idx++) | |
1655 | if (!bch2_dev_exists(c->disk_sb.sb, mi, dev_idx)) | |
1656 | goto have_slot; | |
1657 | no_slot: | |
e8536925 | 1658 | bch_err(c, "device add error: already have maximum number of devices"); |
098ef98d | 1659 | ret = -BCH_ERR_ENOSPC_sb_members; |
1c6fdbd8 KO |
1660 | goto err_unlock; |
1661 | ||
1662 | have_slot: | |
1663 | nr_devices = max_t(unsigned, dev_idx + 1, c->sb.nr_devices); | |
1664 | u64s = (sizeof(struct bch_sb_field_members) + | |
1665 | sizeof(struct bch_member) * nr_devices) / sizeof(u64); | |
1666 | ||
1c6fdbd8 | 1667 | mi = bch2_sb_resize_members(&c->disk_sb, u64s); |
e8536925 KO |
1668 | if (!mi) { |
1669 | bch_err(c, "device add error: no room in superblock for member info"); | |
098ef98d | 1670 | ret = -BCH_ERR_ENOSPC_sb_members; |
1c6fdbd8 | 1671 | goto err_unlock; |
e8536925 | 1672 | } |
1c6fdbd8 KO |
1673 | |
1674 | /* success: */ | |
1675 | ||
1676 | mi->members[dev_idx] = dev_mi; | |
a420eea6 | 1677 | mi->members[dev_idx].last_mount = cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1678 | c->disk_sb.sb->nr_devices = nr_devices; |
1679 | ||
1680 | ca->disk_sb.sb->dev_idx = dev_idx; | |
1681 | bch2_dev_attach(c, ca, dev_idx); | |
1682 | ||
02afcb8c KO |
1683 | if (BCH_MEMBER_GROUP(&dev_mi)) { |
1684 | ret = __bch2_dev_group_set(c, ca, label.buf); | |
1685 | if (ret) { | |
1686 | bch_err(c, "device add error: error setting label"); | |
1687 | goto err_unlock; | |
1688 | } | |
1689 | } | |
1690 | ||
1c6fdbd8 KO |
1691 | bch2_write_super(c); |
1692 | mutex_unlock(&c->sb_lock); | |
1693 | ||
180fb49d KO |
1694 | bch2_dev_usage_journal_reserve(c); |
1695 | ||
d62ab355 | 1696 | ret = bch2_trans_mark_dev_sb(c, ca); |
e8536925 | 1697 | if (ret) { |
d4bf5eec | 1698 | bch_err(c, "device add error: error marking new superblock: %s", bch2_err_str(ret)); |
bfcf840d | 1699 | goto err_late; |
e8536925 | 1700 | } |
8d6b6222 | 1701 | |
c6b2826c KO |
1702 | ret = bch2_fs_freespace_init(c); |
1703 | if (ret) { | |
d4bf5eec | 1704 | bch_err(c, "device add error: error initializing free space: %s", bch2_err_str(ret)); |
c6b2826c KO |
1705 | goto err_late; |
1706 | } | |
1707 | ||
09943313 KO |
1708 | ca->new_fs_bucket_idx = 0; |
1709 | ||
f25d8215 KO |
1710 | if (ca->mi.state == BCH_MEMBER_STATE_rw) |
1711 | __bch2_dev_read_write(c, ca); | |
1c6fdbd8 | 1712 | |
1ada1606 | 1713 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1714 | return 0; |
1715 | ||
1716 | err_unlock: | |
1717 | mutex_unlock(&c->sb_lock); | |
1ada1606 | 1718 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1719 | err: |
1720 | if (ca) | |
1721 | bch2_dev_free(ca); | |
1722 | bch2_free_super(&sb); | |
02afcb8c | 1723 | printbuf_exit(&label); |
fa8e94fa | 1724 | printbuf_exit(&errbuf); |
1c6fdbd8 KO |
1725 | return ret; |
1726 | err_late: | |
bfcf840d | 1727 | up_write(&c->state_lock); |
efe68e1d KO |
1728 | ca = NULL; |
1729 | goto err; | |
1c6fdbd8 KO |
1730 | } |
1731 | ||
1732 | /* Hot add existing device to running filesystem: */ | |
1733 | int bch2_dev_online(struct bch_fs *c, const char *path) | |
1734 | { | |
1735 | struct bch_opts opts = bch2_opts_empty(); | |
1736 | struct bch_sb_handle sb = { NULL }; | |
1737 | struct bch_sb_field_members *mi; | |
1738 | struct bch_dev *ca; | |
1739 | unsigned dev_idx; | |
1c6fdbd8 KO |
1740 | int ret; |
1741 | ||
1ada1606 | 1742 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1743 | |
1744 | ret = bch2_read_super(path, &opts, &sb); | |
1745 | if (ret) { | |
1ada1606 | 1746 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1747 | return ret; |
1748 | } | |
1749 | ||
1750 | dev_idx = sb.sb->dev_idx; | |
1751 | ||
78c0b75c KO |
1752 | ret = bch2_dev_in_fs(c->disk_sb.sb, sb.sb); |
1753 | if (ret) { | |
1754 | bch_err(c, "error bringing %s online: %s", path, bch2_err_str(ret)); | |
1c6fdbd8 | 1755 | goto err; |
e2b60560 | 1756 | } |
1c6fdbd8 | 1757 | |
e2b60560 KO |
1758 | ret = bch2_dev_attach_bdev(c, &sb); |
1759 | if (ret) | |
1c6fdbd8 | 1760 | goto err; |
1c6fdbd8 KO |
1761 | |
1762 | ca = bch_dev_locked(c, dev_idx); | |
bfcf840d | 1763 | |
e2b60560 KO |
1764 | ret = bch2_trans_mark_dev_sb(c, ca); |
1765 | if (ret) { | |
d4bf5eec KO |
1766 | bch_err(c, "error bringing %s online: error from bch2_trans_mark_dev_sb: %s", |
1767 | path, bch2_err_str(ret)); | |
bfcf840d KO |
1768 | goto err; |
1769 | } | |
1770 | ||
f25d8215 KO |
1771 | if (ca->mi.state == BCH_MEMBER_STATE_rw) |
1772 | __bch2_dev_read_write(c, ca); | |
1c6fdbd8 KO |
1773 | |
1774 | mutex_lock(&c->sb_lock); | |
1775 | mi = bch2_sb_get_members(c->disk_sb.sb); | |
1776 | ||
1777 | mi->members[ca->dev_idx].last_mount = | |
a420eea6 | 1778 | cpu_to_le64(ktime_get_real_seconds()); |
1c6fdbd8 KO |
1779 | |
1780 | bch2_write_super(c); | |
1781 | mutex_unlock(&c->sb_lock); | |
1782 | ||
b1c945b3 KO |
1783 | ret = bch2_fs_freespace_init(c); |
1784 | if (ret) | |
1785 | bch_err(c, "device add error: error initializing free space: %s", bch2_err_str(ret)); | |
1786 | ||
1ada1606 | 1787 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1788 | return 0; |
1789 | err: | |
1ada1606 | 1790 | up_write(&c->state_lock); |
1c6fdbd8 | 1791 | bch2_free_super(&sb); |
78c0b75c | 1792 | return ret; |
1c6fdbd8 KO |
1793 | } |
1794 | ||
1795 | int bch2_dev_offline(struct bch_fs *c, struct bch_dev *ca, int flags) | |
1796 | { | |
1ada1606 | 1797 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1798 | |
1799 | if (!bch2_dev_is_online(ca)) { | |
1800 | bch_err(ca, "Already offline"); | |
1ada1606 | 1801 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1802 | return 0; |
1803 | } | |
1804 | ||
2436cb9f | 1805 | if (!bch2_dev_state_allowed(c, ca, BCH_MEMBER_STATE_failed, flags)) { |
1c6fdbd8 | 1806 | bch_err(ca, "Cannot offline required disk"); |
1ada1606 | 1807 | up_write(&c->state_lock); |
78c0b75c | 1808 | return -BCH_ERR_device_state_not_allowed; |
1c6fdbd8 KO |
1809 | } |
1810 | ||
1811 | __bch2_dev_offline(c, ca); | |
1812 | ||
1ada1606 | 1813 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1814 | return 0; |
1815 | } | |
1816 | ||
1817 | int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets) | |
1818 | { | |
1819 | struct bch_member *mi; | |
1820 | int ret = 0; | |
1821 | ||
1ada1606 | 1822 | down_write(&c->state_lock); |
1c6fdbd8 KO |
1823 | |
1824 | if (nbuckets < ca->mi.nbuckets) { | |
1825 | bch_err(ca, "Cannot shrink yet"); | |
1826 | ret = -EINVAL; | |
1827 | goto err; | |
1828 | } | |
1829 | ||
1830 | if (bch2_dev_is_online(ca) && | |
1831 | get_capacity(ca->disk_sb.bdev->bd_disk) < | |
1832 | ca->mi.bucket_size * nbuckets) { | |
1833 | bch_err(ca, "New size larger than device"); | |
78c0b75c | 1834 | ret = -BCH_ERR_device_size_too_small; |
1c6fdbd8 KO |
1835 | goto err; |
1836 | } | |
1837 | ||
1838 | ret = bch2_dev_buckets_resize(c, ca, nbuckets); | |
1839 | if (ret) { | |
d4bf5eec | 1840 | bch_err(ca, "Resize error: %s", bch2_err_str(ret)); |
1c6fdbd8 KO |
1841 | goto err; |
1842 | } | |
1843 | ||
224ec3e6 | 1844 | ret = bch2_trans_mark_dev_sb(c, ca); |
3e3e02e6 | 1845 | if (ret) |
224ec3e6 | 1846 | goto err; |
224ec3e6 | 1847 | |
1c6fdbd8 KO |
1848 | mutex_lock(&c->sb_lock); |
1849 | mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx]; | |
1850 | mi->nbuckets = cpu_to_le64(nbuckets); | |
1851 | ||
1852 | bch2_write_super(c); | |
1853 | mutex_unlock(&c->sb_lock); | |
1854 | ||
1855 | bch2_recalc_capacity(c); | |
1856 | err: | |
1ada1606 | 1857 | up_write(&c->state_lock); |
1c6fdbd8 KO |
1858 | return ret; |
1859 | } | |
1860 | ||
1861 | /* return with ref on ca->ref: */ | |
bf7e49a4 | 1862 | struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *name) |
1c6fdbd8 | 1863 | { |
1c6fdbd8 | 1864 | struct bch_dev *ca; |
1c6fdbd8 | 1865 | unsigned i; |
1c6fdbd8 | 1866 | |
3a402c8d KO |
1867 | rcu_read_lock(); |
1868 | for_each_member_device_rcu(ca, c, i, NULL) | |
bf7e49a4 | 1869 | if (!strcmp(name, ca->name)) |
1c6fdbd8 | 1870 | goto found; |
e47a390a | 1871 | ca = ERR_PTR(-BCH_ERR_ENOENT_dev_not_found); |
1c6fdbd8 | 1872 | found: |
3a402c8d KO |
1873 | rcu_read_unlock(); |
1874 | ||
1c6fdbd8 KO |
1875 | return ca; |
1876 | } | |
1877 | ||
1878 | /* Filesystem open: */ | |
1879 | ||
1880 | struct bch_fs *bch2_fs_open(char * const *devices, unsigned nr_devices, | |
1881 | struct bch_opts opts) | |
1882 | { | |
1883 | struct bch_sb_handle *sb = NULL; | |
1884 | struct bch_fs *c = NULL; | |
625104ea | 1885 | struct bch_sb_field_members *mi; |
1c6fdbd8 | 1886 | unsigned i, best_sb = 0; |
fa8e94fa | 1887 | struct printbuf errbuf = PRINTBUF; |
e2b60560 | 1888 | int ret = 0; |
1c6fdbd8 | 1889 | |
efe68e1d KO |
1890 | if (!try_module_get(THIS_MODULE)) |
1891 | return ERR_PTR(-ENODEV); | |
1892 | ||
1c6fdbd8 | 1893 | if (!nr_devices) { |
efe68e1d KO |
1894 | ret = -EINVAL; |
1895 | goto err; | |
1c6fdbd8 KO |
1896 | } |
1897 | ||
1c6fdbd8 | 1898 | sb = kcalloc(nr_devices, sizeof(*sb), GFP_KERNEL); |
e2b60560 KO |
1899 | if (!sb) { |
1900 | ret = -ENOMEM; | |
1c6fdbd8 | 1901 | goto err; |
e2b60560 | 1902 | } |
1c6fdbd8 KO |
1903 | |
1904 | for (i = 0; i < nr_devices; i++) { | |
1905 | ret = bch2_read_super(devices[i], &opts, &sb[i]); | |
1906 | if (ret) | |
1907 | goto err; | |
1908 | ||
1c6fdbd8 KO |
1909 | } |
1910 | ||
1911 | for (i = 1; i < nr_devices; i++) | |
1912 | if (le64_to_cpu(sb[i].sb->seq) > | |
1913 | le64_to_cpu(sb[best_sb].sb->seq)) | |
1914 | best_sb = i; | |
1915 | ||
625104ea KO |
1916 | mi = bch2_sb_get_members(sb[best_sb].sb); |
1917 | ||
1918 | i = 0; | |
1919 | while (i < nr_devices) { | |
1920 | if (i != best_sb && | |
1921 | !bch2_dev_exists(sb[best_sb].sb, mi, sb[i].sb->dev_idx)) { | |
1922 | pr_info("%pg has been removed, skipping", sb[i].bdev); | |
1923 | bch2_free_super(&sb[i]); | |
1924 | array_remove_item(sb, nr_devices, i); | |
1925 | continue; | |
1926 | } | |
1927 | ||
78c0b75c KO |
1928 | ret = bch2_dev_in_fs(sb[best_sb].sb, sb[i].sb); |
1929 | if (ret) | |
1c6fdbd8 | 1930 | goto err_print; |
625104ea | 1931 | i++; |
1c6fdbd8 KO |
1932 | } |
1933 | ||
1c6fdbd8 | 1934 | c = bch2_fs_alloc(sb[best_sb].sb, opts); |
7be9ab63 CW |
1935 | if (IS_ERR(c)) { |
1936 | ret = PTR_ERR(c); | |
1c6fdbd8 | 1937 | goto err; |
7be9ab63 | 1938 | } |
1c6fdbd8 | 1939 | |
1ada1606 | 1940 | down_write(&c->state_lock); |
e2b60560 KO |
1941 | for (i = 0; i < nr_devices; i++) { |
1942 | ret = bch2_dev_attach_bdev(c, &sb[i]); | |
1943 | if (ret) { | |
1ada1606 | 1944 | up_write(&c->state_lock); |
e2b60560 | 1945 | goto err; |
1c6fdbd8 | 1946 | } |
e2b60560 | 1947 | } |
1ada1606 | 1948 | up_write(&c->state_lock); |
1c6fdbd8 | 1949 | |
78c0b75c KO |
1950 | if (!bch2_fs_may_start(c)) { |
1951 | ret = -BCH_ERR_insufficient_devices_to_start; | |
1c6fdbd8 | 1952 | goto err_print; |
78c0b75c | 1953 | } |
1c6fdbd8 KO |
1954 | |
1955 | if (!c->opts.nostart) { | |
619f5bee KO |
1956 | ret = bch2_fs_start(c); |
1957 | if (ret) | |
1958 | goto err; | |
1c6fdbd8 KO |
1959 | } |
1960 | out: | |
1961 | kfree(sb); | |
fa8e94fa | 1962 | printbuf_exit(&errbuf); |
1c6fdbd8 | 1963 | module_put(THIS_MODULE); |
1c6fdbd8 KO |
1964 | return c; |
1965 | err_print: | |
1966 | pr_err("bch_fs_open err opening %s: %s", | |
78c0b75c | 1967 | devices[0], bch2_err_str(ret)); |
1c6fdbd8 | 1968 | err: |
7be9ab63 | 1969 | if (!IS_ERR_OR_NULL(c)) |
1c6fdbd8 | 1970 | bch2_fs_stop(c); |
e2b60560 KO |
1971 | if (sb) |
1972 | for (i = 0; i < nr_devices; i++) | |
1973 | bch2_free_super(&sb[i]); | |
1c6fdbd8 KO |
1974 | c = ERR_PTR(ret); |
1975 | goto out; | |
1976 | } | |
1977 | ||
1c6fdbd8 KO |
1978 | /* Global interfaces/init */ |
1979 | ||
1980 | static void bcachefs_exit(void) | |
1981 | { | |
1982 | bch2_debug_exit(); | |
1983 | bch2_vfs_exit(); | |
1984 | bch2_chardev_exit(); | |
14ba3706 | 1985 | bch2_btree_key_cache_exit(); |
1c6fdbd8 KO |
1986 | if (bcachefs_kset) |
1987 | kset_unregister(bcachefs_kset); | |
1988 | } | |
1989 | ||
1990 | static int __init bcachefs_init(void) | |
1991 | { | |
1992 | bch2_bkey_pack_test(); | |
1c6fdbd8 KO |
1993 | |
1994 | if (!(bcachefs_kset = kset_create_and_add("bcachefs", NULL, fs_kobj)) || | |
14ba3706 | 1995 | bch2_btree_key_cache_init() || |
1c6fdbd8 KO |
1996 | bch2_chardev_init() || |
1997 | bch2_vfs_init() || | |
1998 | bch2_debug_init()) | |
1999 | goto err; | |
2000 | ||
2001 | return 0; | |
2002 | err: | |
2003 | bcachefs_exit(); | |
2004 | return -ENOMEM; | |
2005 | } | |
2006 | ||
2007 | #define BCH_DEBUG_PARAM(name, description) \ | |
2008 | bool bch2_##name; \ | |
2009 | module_param_named(name, bch2_##name, bool, 0644); \ | |
2010 | MODULE_PARM_DESC(name, description); | |
2011 | BCH_DEBUG_PARAMS() | |
2012 | #undef BCH_DEBUG_PARAM | |
2013 | ||
e08e63e4 | 2014 | __maybe_unused |
73bd774d | 2015 | static unsigned bch2_metadata_version = bcachefs_metadata_version_current; |
1c6fdbd8 KO |
2016 | module_param_named(version, bch2_metadata_version, uint, 0400); |
2017 | ||
2018 | module_exit(bcachefs_exit); | |
2019 | module_init(bcachefs_init); |