]> git.ipfire.org Git - thirdparty/linux.git/blob - fs/bcachefs/super-io.c
projects / thirdparty / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge tag 'bcachefs-2024-03-19' of https://evilpiepirate.org/git/bcachefs
[thirdparty/linux.git] / fs / bcachefs / super-io.c
1 // SPDX-License-Identifier: GPL-2.0
2
3 #include "bcachefs.h"
4 #include "checksum.h"
5 #include "disk_groups.h"
6 #include "ec.h"
7 #include "error.h"
8 #include "journal.h"
9 #include "journal_sb.h"
10 #include "journal_seq_blacklist.h"
11 #include "recovery.h"
12 #include "replicas.h"
13 #include "quota.h"
14 #include "sb-clean.h"
15 #include "sb-counters.h"
16 #include "sb-downgrade.h"
17 #include "sb-errors.h"
18 #include "sb-members.h"
19 #include "super-io.h"
20 #include "super.h"
21 #include "trace.h"
22 #include "vstructs.h"
23
24 #include <linux/backing-dev.h>
25 #include <linux/sort.h>
26
27 static const struct blk_holder_ops bch2_sb_handle_bdev_ops = {
28 };
29
30 struct bch2_metadata_version {
31 u16 version;
32 const char *name;
33 };
34
35 static const struct bch2_metadata_version bch2_metadata_versions[] = {
36 #define x(n, v) { \
37 .version = v, \
38 .name = #n, \
39 },
40 BCH_METADATA_VERSIONS()
41 #undef x
42 };
43
44 void bch2_version_to_text(struct printbuf *out, unsigned v)
45 {
46 const char *str = "(unknown version)";
47
48 for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++)
49 if (bch2_metadata_versions[i].version == v) {
50 str = bch2_metadata_versions[i].name;
51 break;
52 }
53
54 prt_printf(out, "%u.%u: %s", BCH_VERSION_MAJOR(v), BCH_VERSION_MINOR(v), str);
55 }
56
57 unsigned bch2_latest_compatible_version(unsigned v)
58 {
59 if (!BCH_VERSION_MAJOR(v))
60 return v;
61
62 for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++)
63 if (bch2_metadata_versions[i].version > v &&
64 BCH_VERSION_MAJOR(bch2_metadata_versions[i].version) ==
65 BCH_VERSION_MAJOR(v))
66 v = bch2_metadata_versions[i].version;
67
68 return v;
69 }
70
71 const char * const bch2_sb_fields[] = {
72 #define x(name, nr) #name,
73 BCH_SB_FIELDS()
74 #undef x
75 NULL
76 };
77
78 static int bch2_sb_field_validate(struct bch_sb *, struct bch_sb_field *,
79 struct printbuf *);
80
81 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *sb,
82 enum bch_sb_field_type type)
83 {
84 /* XXX: need locking around superblock to access optional fields */
85
86 vstruct_for_each(sb, f)
87 if (le32_to_cpu(f->type) == type)
88 return f;
89 return NULL;
90 }
91
92 static struct bch_sb_field *__bch2_sb_field_resize(struct bch_sb_handle *sb,
93 struct bch_sb_field *f,
94 unsigned u64s)
95 {
96 unsigned old_u64s = f ? le32_to_cpu(f->u64s) : 0;
97 unsigned sb_u64s = le32_to_cpu(sb->sb->u64s) + u64s - old_u64s;
98
99 BUG_ON(__vstruct_bytes(struct bch_sb, sb_u64s) > sb->buffer_size);
100
101 if (!f && !u64s) {
102 /* nothing to do: */
103 } else if (!f) {
104 f = vstruct_last(sb->sb);
105 memset(f, 0, sizeof(u64) * u64s);
106 f->u64s = cpu_to_le32(u64s);
107 f->type = 0;
108 } else {
109 void *src, *dst;
110
111 src = vstruct_end(f);
112
113 if (u64s) {
114 f->u64s = cpu_to_le32(u64s);
115 dst = vstruct_end(f);
116 } else {
117 dst = f;
118 }
119
120 memmove(dst, src, vstruct_end(sb->sb) - src);
121
122 if (dst > src)
123 memset(src, 0, dst - src);
124 }
125
126 sb->sb->u64s = cpu_to_le32(sb_u64s);
127
128 return u64s ? f : NULL;
129 }
130
131 void bch2_sb_field_delete(struct bch_sb_handle *sb,
132 enum bch_sb_field_type type)
133 {
134 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type);
135
136 if (f)
137 __bch2_sb_field_resize(sb, f, 0);
138 }
139
140 /* Superblock realloc/free: */
141
142 void bch2_free_super(struct bch_sb_handle *sb)
143 {
144 kfree(sb->bio);
145 if (!IS_ERR_OR_NULL(sb->s_bdev_file))
146 fput(sb->s_bdev_file);
147 kfree(sb->holder);
148 kfree(sb->sb_name);
149
150 kfree(sb->sb);
151 memset(sb, 0, sizeof(*sb));
152 }
153
154 int bch2_sb_realloc(struct bch_sb_handle *sb, unsigned u64s)
155 {
156 size_t new_bytes = __vstruct_bytes(struct bch_sb, u64s);
157 size_t new_buffer_size;
158 struct bch_sb *new_sb;
159 struct bio *bio;
160
161 if (sb->bdev)
162 new_bytes = max_t(size_t, new_bytes, bdev_logical_block_size(sb->bdev));
163
164 new_buffer_size = roundup_pow_of_two(new_bytes);
165
166 if (sb->sb && sb->buffer_size >= new_buffer_size)
167 return 0;
168
169 if (sb->sb && sb->have_layout) {
170 u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits;
171
172 if (new_bytes > max_bytes) {
173 struct printbuf buf = PRINTBUF;
174
175 prt_bdevname(&buf, sb->bdev);
176 prt_printf(&buf, ": superblock too big: want %zu but have %llu", new_bytes, max_bytes);
177 pr_err("%s", buf.buf);
178 printbuf_exit(&buf);
179 return -BCH_ERR_ENOSPC_sb;
180 }
181 }
182
183 if (sb->buffer_size >= new_buffer_size && sb->sb)
184 return 0;
185
186 if (dynamic_fault("bcachefs:add:super_realloc"))
187 return -BCH_ERR_ENOMEM_sb_realloc_injected;
188
189 new_sb = krealloc(sb->sb, new_buffer_size, GFP_NOFS|__GFP_ZERO);
190 if (!new_sb)
191 return -BCH_ERR_ENOMEM_sb_buf_realloc;
192
193 sb->sb = new_sb;
194
195 if (sb->have_bio) {
196 unsigned nr_bvecs = buf_pages(sb->sb, new_buffer_size);
197
198 bio = bio_kmalloc(nr_bvecs, GFP_KERNEL);
199 if (!bio)
200 return -BCH_ERR_ENOMEM_sb_bio_realloc;
201
202 bio_init(bio, NULL, bio->bi_inline_vecs, nr_bvecs, 0);
203
204 kfree(sb->bio);
205 sb->bio = bio;
206 }
207
208 sb->buffer_size = new_buffer_size;
209
210 return 0;
211 }
212
213 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *sb,
214 enum bch_sb_field_type type,
215 unsigned u64s)
216 {
217 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type);
218 ssize_t old_u64s = f ? le32_to_cpu(f->u64s) : 0;
219 ssize_t d = -old_u64s + u64s;
220
221 if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s) + d))
222 return NULL;
223
224 if (sb->fs_sb) {
225 struct bch_fs *c = container_of(sb, struct bch_fs, disk_sb);
226
227 lockdep_assert_held(&c->sb_lock);
228
229 /* XXX: we're not checking that offline device have enough space */
230
231 for_each_online_member(c, ca) {
232 struct bch_sb_handle *dev_sb = &ca->disk_sb;
233
234 if (bch2_sb_realloc(dev_sb, le32_to_cpu(dev_sb->sb->u64s) + d)) {
235 percpu_ref_put(&ca->ref);
236 return NULL;
237 }
238 }
239 }
240
241 f = bch2_sb_field_get_id(sb->sb, type);
242 f = __bch2_sb_field_resize(sb, f, u64s);
243 if (f)
244 f->type = cpu_to_le32(type);
245 return f;
246 }
247
248 struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *sb,
249 enum bch_sb_field_type type,
250 unsigned u64s)
251 {
252 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type);
253
254 if (!f || le32_to_cpu(f->u64s) < u64s)
255 f = bch2_sb_field_resize_id(sb, type, u64s);
256 return f;
257 }
258
259 /* Superblock validate: */
260
261 static int validate_sb_layout(struct bch_sb_layout *layout, struct printbuf *out)
262 {
263 u64 offset, prev_offset, max_sectors;
264 unsigned i;
265
266 BUILD_BUG_ON(sizeof(struct bch_sb_layout) != 512);
267
268 if (!uuid_equal(&layout->magic, &BCACHE_MAGIC) &&
269 !uuid_equal(&layout->magic, &BCHFS_MAGIC)) {
270 prt_printf(out, "Not a bcachefs superblock layout");
271 return -BCH_ERR_invalid_sb_layout;
272 }
273
274 if (layout->layout_type != 0) {
275 prt_printf(out, "Invalid superblock layout type %u",
276 layout->layout_type);
277 return -BCH_ERR_invalid_sb_layout_type;
278 }
279
280 if (!layout->nr_superblocks) {
281 prt_printf(out, "Invalid superblock layout: no superblocks");
282 return -BCH_ERR_invalid_sb_layout_nr_superblocks;
283 }
284
285 if (layout->nr_superblocks > ARRAY_SIZE(layout->sb_offset)) {
286 prt_printf(out, "Invalid superblock layout: too many superblocks");
287 return -BCH_ERR_invalid_sb_layout_nr_superblocks;
288 }
289
290 max_sectors = 1 << layout->sb_max_size_bits;
291
292 prev_offset = le64_to_cpu(layout->sb_offset[0]);
293
294 for (i = 1; i < layout->nr_superblocks; i++) {
295 offset = le64_to_cpu(layout->sb_offset[i]);
296
297 if (offset < prev_offset + max_sectors) {
298 prt_printf(out, "Invalid superblock layout: superblocks overlap\n"
299 " (sb %u ends at %llu next starts at %llu",
300 i - 1, prev_offset + max_sectors, offset);
301 return -BCH_ERR_invalid_sb_layout_superblocks_overlap;
302 }
303 prev_offset = offset;
304 }
305
306 return 0;
307 }
308
309 static int bch2_sb_compatible(struct bch_sb *sb, struct printbuf *out)
310 {
311 u16 version = le16_to_cpu(sb->version);
312 u16 version_min = le16_to_cpu(sb->version_min);
313
314 if (!bch2_version_compatible(version)) {
315 prt_str(out, "Unsupported superblock version ");
316 bch2_version_to_text(out, version);
317 prt_str(out, " (min ");
318 bch2_version_to_text(out, bcachefs_metadata_version_min);
319 prt_str(out, ", max ");
320 bch2_version_to_text(out, bcachefs_metadata_version_current);
321 prt_str(out, ")");
322 return -BCH_ERR_invalid_sb_version;
323 }
324
325 if (!bch2_version_compatible(version_min)) {
326 prt_str(out, "Unsupported superblock version_min ");
327 bch2_version_to_text(out, version_min);
328 prt_str(out, " (min ");
329 bch2_version_to_text(out, bcachefs_metadata_version_min);
330 prt_str(out, ", max ");
331 bch2_version_to_text(out, bcachefs_metadata_version_current);
332 prt_str(out, ")");
333 return -BCH_ERR_invalid_sb_version;
334 }
335
336 if (version_min > version) {
337 prt_str(out, "Bad minimum version ");
338 bch2_version_to_text(out, version_min);
339 prt_str(out, ", greater than version field ");
340 bch2_version_to_text(out, version);
341 return -BCH_ERR_invalid_sb_version;
342 }
343
344 return 0;
345 }
346
347 static int bch2_sb_validate(struct bch_sb_handle *disk_sb, struct printbuf *out,
348 int rw)
349 {
350 struct bch_sb *sb = disk_sb->sb;
351 struct bch_sb_field_members_v1 *mi;
352 enum bch_opt_id opt_id;
353 u16 block_size;
354 int ret;
355
356 ret = bch2_sb_compatible(sb, out);
357 if (ret)
358 return ret;
359
360 if (sb->features[1] ||
361 (le64_to_cpu(sb->features[0]) & (~0ULL << BCH_FEATURE_NR))) {
362 prt_printf(out, "Filesystem has incompatible features");
363 return -BCH_ERR_invalid_sb_features;
364 }
365
366 block_size = le16_to_cpu(sb->block_size);
367
368 if (block_size > PAGE_SECTORS) {
369 prt_printf(out, "Block size too big (got %u, max %u)",
370 block_size, PAGE_SECTORS);
371 return -BCH_ERR_invalid_sb_block_size;
372 }
373
374 if (bch2_is_zero(sb->user_uuid.b, sizeof(sb->user_uuid))) {
375 prt_printf(out, "Bad user UUID (got zeroes)");
376 return -BCH_ERR_invalid_sb_uuid;
377 }
378
379 if (bch2_is_zero(sb->uuid.b, sizeof(sb->uuid))) {
380 prt_printf(out, "Bad internal UUID (got zeroes)");
381 return -BCH_ERR_invalid_sb_uuid;
382 }
383
384 if (!sb->nr_devices ||
385 sb->nr_devices > BCH_SB_MEMBERS_MAX) {
386 prt_printf(out, "Bad number of member devices %u (max %u)",
387 sb->nr_devices, BCH_SB_MEMBERS_MAX);
388 return -BCH_ERR_invalid_sb_too_many_members;
389 }
390
391 if (sb->dev_idx >= sb->nr_devices) {
392 prt_printf(out, "Bad dev_idx (got %u, nr_devices %u)",
393 sb->dev_idx, sb->nr_devices);
394 return -BCH_ERR_invalid_sb_dev_idx;
395 }
396
397 if (!sb->time_precision ||
398 le32_to_cpu(sb->time_precision) > NSEC_PER_SEC) {
399 prt_printf(out, "Invalid time precision: %u (min 1, max %lu)",
400 le32_to_cpu(sb->time_precision), NSEC_PER_SEC);
401 return -BCH_ERR_invalid_sb_time_precision;
402 }
403
404 if (rw == READ) {
405 /*
406 * Been seeing a bug where these are getting inexplicably
407 * zeroed, so we're now validating them, but we have to be
408 * careful not to preven people's filesystems from mounting:
409 */
410 if (!BCH_SB_JOURNAL_FLUSH_DELAY(sb))
411 SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000);
412 if (!BCH_SB_JOURNAL_RECLAIM_DELAY(sb))
413 SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 1000);
414
415 if (!BCH_SB_VERSION_UPGRADE_COMPLETE(sb))
416 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(sb, le16_to_cpu(sb->version));
417 }
418
419 for (opt_id = 0; opt_id < bch2_opts_nr; opt_id++) {
420 const struct bch_option *opt = bch2_opt_table + opt_id;
421
422 if (opt->get_sb != BCH2_NO_SB_OPT) {
423 u64 v = bch2_opt_from_sb(sb, opt_id);
424
425 prt_printf(out, "Invalid option ");
426 ret = bch2_opt_validate(opt, v, out);
427 if (ret)
428 return ret;
429
430 printbuf_reset(out);
431 }
432 }
433
434 /* validate layout */
435 ret = validate_sb_layout(&sb->layout, out);
436 if (ret)
437 return ret;
438
439 vstruct_for_each(sb, f) {
440 if (!f->u64s) {
441 prt_printf(out, "Invalid superblock: optional field with size 0 (type %u)",
442 le32_to_cpu(f->type));
443 return -BCH_ERR_invalid_sb_field_size;
444 }
445
446 if (vstruct_next(f) > vstruct_last(sb)) {
447 prt_printf(out, "Invalid superblock: optional field extends past end of superblock (type %u)",
448 le32_to_cpu(f->type));
449 return -BCH_ERR_invalid_sb_field_size;
450 }
451 }
452
453 /* members must be validated first: */
454 mi = bch2_sb_field_get(sb, members_v1);
455 if (!mi) {
456 prt_printf(out, "Invalid superblock: member info area missing");
457 return -BCH_ERR_invalid_sb_members_missing;
458 }
459
460 ret = bch2_sb_field_validate(sb, &mi->field, out);
461 if (ret)
462 return ret;
463
464 vstruct_for_each(sb, f) {
465 if (le32_to_cpu(f->type) == BCH_SB_FIELD_members_v1)
466 continue;
467
468 ret = bch2_sb_field_validate(sb, f, out);
469 if (ret)
470 return ret;
471 }
472
473 if (rw == WRITE &&
474 bch2_sb_member_get(sb, sb->dev_idx).seq != sb->seq) {
475 prt_printf(out, "Invalid superblock: member seq %llu != sb seq %llu",
476 le64_to_cpu(bch2_sb_member_get(sb, sb->dev_idx).seq),
477 le64_to_cpu(sb->seq));
478 return -BCH_ERR_invalid_sb_members_missing;
479 }
480
481 return 0;
482 }
483
484 /* device open: */
485
486 static unsigned long le_ulong_to_cpu(unsigned long v)
487 {
488 return sizeof(unsigned long) == 8
489 ? le64_to_cpu(v)
490 : le32_to_cpu(v);
491 }
492
493 static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr)
494 {
495 BUG_ON(nr & (BITS_PER_TYPE(long) - 1));
496
497 for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++)
498 dst[i] = le_ulong_to_cpu(src[i]);
499 }
500
501 static void bch2_sb_update(struct bch_fs *c)
502 {
503 struct bch_sb *src = c->disk_sb.sb;
504
505 lockdep_assert_held(&c->sb_lock);
506
507 c->sb.uuid = src->uuid;
508 c->sb.user_uuid = src->user_uuid;
509 c->sb.version = le16_to_cpu(src->version);
510 c->sb.version_min = le16_to_cpu(src->version_min);
511 c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src);
512 c->sb.nr_devices = src->nr_devices;
513 c->sb.clean = BCH_SB_CLEAN(src);
514 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src);
515
516 c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision);
517 c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit;
518
519 /* XXX this is wrong, we need a 96 or 128 bit integer type */
520 c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo),
521 c->sb.nsec_per_time_unit);
522 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi);
523
524 c->sb.features = le64_to_cpu(src->features[0]);
525 c->sb.compat = le64_to_cpu(src->compat[0]);
526
527 memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent));
528
529 struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext);
530 if (ext)
531 le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent,
532 sizeof(c->sb.errors_silent) * 8);
533
534 for_each_member_device(c, ca) {
535 struct bch_member m = bch2_sb_member_get(src, ca->dev_idx);
536 ca->mi = bch2_mi_to_cpu(&m);
537 }
538 }
539
540 static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src)
541 {
542 struct bch_sb_field *src_f, *dst_f;
543 struct bch_sb *dst = dst_handle->sb;
544 unsigned i;
545
546 dst->version = src->version;
547 dst->version_min = src->version_min;
548 dst->seq = src->seq;
549 dst->uuid = src->uuid;
550 dst->user_uuid = src->user_uuid;
551 memcpy(dst->label, src->label, sizeof(dst->label));
552
553 dst->block_size = src->block_size;
554 dst->nr_devices = src->nr_devices;
555
556 dst->time_base_lo = src->time_base_lo;
557 dst->time_base_hi = src->time_base_hi;
558 dst->time_precision = src->time_precision;
559 dst->write_time = src->write_time;
560
561 memcpy(dst->flags, src->flags, sizeof(dst->flags));
562 memcpy(dst->features, src->features, sizeof(dst->features));
563 memcpy(dst->compat, src->compat, sizeof(dst->compat));
564
565 for (i = 0; i < BCH_SB_FIELD_NR; i++) {
566 int d;
567
568 if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS)
569 continue;
570
571 src_f = bch2_sb_field_get_id(src, i);
572 dst_f = bch2_sb_field_get_id(dst, i);
573
574 d = (src_f ? le32_to_cpu(src_f->u64s) : 0) -
575 (dst_f ? le32_to_cpu(dst_f->u64s) : 0);
576 if (d > 0) {
577 int ret = bch2_sb_realloc(dst_handle,
578 le32_to_cpu(dst_handle->sb->u64s) + d);
579
580 if (ret)
581 return ret;
582
583 dst = dst_handle->sb;
584 dst_f = bch2_sb_field_get_id(dst, i);
585 }
586
587 dst_f = __bch2_sb_field_resize(dst_handle, dst_f,
588 src_f ? le32_to_cpu(src_f->u64s) : 0);
589
590 if (src_f)
591 memcpy(dst_f, src_f, vstruct_bytes(src_f));
592 }
593
594 return 0;
595 }
596
597 int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src)
598 {
599 int ret;
600
601 lockdep_assert_held(&c->sb_lock);
602
603 ret = bch2_sb_realloc(&c->disk_sb, 0) ?:
604 __copy_super(&c->disk_sb, src) ?:
605 bch2_sb_replicas_to_cpu_replicas(c) ?:
606 bch2_sb_disk_groups_to_cpu(c);
607 if (ret)
608 return ret;
609
610 bch2_sb_update(c);
611 return 0;
612 }
613
614 int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca)
615 {
616 return __copy_super(&ca->disk_sb, c->disk_sb.sb);
617 }
618
619 /* read superblock: */
620
621 static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err)
622 {
623 size_t bytes;
624 int ret;
625 reread:
626 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
627 sb->bio->bi_iter.bi_sector = offset;
628 bch2_bio_map(sb->bio, sb->sb, sb->buffer_size);
629
630 ret = submit_bio_wait(sb->bio);
631 if (ret) {
632 prt_printf(err, "IO error: %i", ret);
633 return ret;
634 }
635
636 if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) &&
637 !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) {
638 prt_str(err, "Not a bcachefs superblock (got magic ");
639 pr_uuid(err, sb->sb->magic.b);
640 prt_str(err, ")");
641 return -BCH_ERR_invalid_sb_magic;
642 }
643
644 ret = bch2_sb_compatible(sb->sb, err);
645 if (ret)
646 return ret;
647
648 bytes = vstruct_bytes(sb->sb);
649
650 if (bytes > 512 << sb->sb->layout.sb_max_size_bits) {
651 prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %lu)",
652 bytes, 512UL << sb->sb->layout.sb_max_size_bits);
653 return -BCH_ERR_invalid_sb_too_big;
654 }
655
656 if (bytes > sb->buffer_size) {
657 ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s));
658 if (ret)
659 return ret;
660 goto reread;
661 }
662
663 enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb);
664 if (csum_type >= BCH_CSUM_NR) {
665 prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb));
666 return -BCH_ERR_invalid_sb_csum_type;
667 }
668
669 /* XXX: verify MACs */
670 struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb);
671 if (bch2_crc_cmp(csum, sb->sb->csum)) {
672 bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum);
673 return -BCH_ERR_invalid_sb_csum;
674 }
675
676 sb->seq = le64_to_cpu(sb->sb->seq);
677
678 return 0;
679 }
680
681 static int __bch2_read_super(const char *path, struct bch_opts *opts,
682 struct bch_sb_handle *sb, bool ignore_notbchfs_msg)
683 {
684 u64 offset = opt_get(*opts, sb);
685 struct bch_sb_layout layout;
686 struct printbuf err = PRINTBUF;
687 struct printbuf err2 = PRINTBUF;
688 __le64 *i;
689 int ret;
690 #ifndef __KERNEL__
691 retry:
692 #endif
693 memset(sb, 0, sizeof(*sb));
694 sb->mode = BLK_OPEN_READ;
695 sb->have_bio = true;
696 sb->holder = kmalloc(1, GFP_KERNEL);
697 if (!sb->holder)
698 return -ENOMEM;
699
700 sb->sb_name = kstrdup(path, GFP_KERNEL);
701 if (!sb->sb_name)
702 return -ENOMEM;
703
704 #ifndef __KERNEL__
705 if (opt_get(*opts, direct_io) == false)
706 sb->mode |= BLK_OPEN_BUFFERED;
707 #endif
708
709 if (!opt_get(*opts, noexcl))
710 sb->mode |= BLK_OPEN_EXCL;
711
712 if (!opt_get(*opts, nochanges))
713 sb->mode |= BLK_OPEN_WRITE;
714
715 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops);
716 if (IS_ERR(sb->s_bdev_file) &&
717 PTR_ERR(sb->s_bdev_file) == -EACCES &&
718 opt_get(*opts, read_only)) {
719 sb->mode &= ~BLK_OPEN_WRITE;
720
721 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops);
722 if (!IS_ERR(sb->s_bdev_file))
723 opt_set(*opts, nochanges, true);
724 }
725
726 if (IS_ERR(sb->s_bdev_file)) {
727 ret = PTR_ERR(sb->s_bdev_file);
728 prt_printf(&err, "error opening %s: %s", path, bch2_err_str(ret));
729 goto err;
730 }
731 sb->bdev = file_bdev(sb->s_bdev_file);
732
733 ret = bch2_sb_realloc(sb, 0);
734 if (ret) {
735 prt_printf(&err, "error allocating memory for superblock");
736 goto err;
737 }
738
739 if (bch2_fs_init_fault("read_super")) {
740 prt_printf(&err, "dynamic fault");
741 ret = -EFAULT;
742 goto err;
743 }
744
745 ret = read_one_super(sb, offset, &err);
746 if (!ret)
747 goto got_super;
748
749 if (opt_defined(*opts, sb))
750 goto err;
751
752 prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n",
753 path, err.buf);
754 if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg)
755 bch2_print_opts(opts, KERN_INFO "%s", err2.buf);
756 else
757 bch2_print_opts(opts, KERN_ERR "%s", err2.buf);
758
759 printbuf_exit(&err2);
760 printbuf_reset(&err);
761
762 /*
763 * Error reading primary superblock - read location of backup
764 * superblocks:
765 */
766 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
767 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR;
768 /*
769 * use sb buffer to read layout, since sb buffer is page aligned but
770 * layout won't be:
771 */
772 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout));
773
774 ret = submit_bio_wait(sb->bio);
775 if (ret) {
776 prt_printf(&err, "IO error: %i", ret);
777 goto err;
778 }
779
780 memcpy(&layout, sb->sb, sizeof(layout));
781 ret = validate_sb_layout(&layout, &err);
782 if (ret)
783 goto err;
784
785 for (i = layout.sb_offset;
786 i < layout.sb_offset + layout.nr_superblocks; i++) {
787 offset = le64_to_cpu(*i);
788
789 if (offset == opt_get(*opts, sb))
790 continue;
791
792 ret = read_one_super(sb, offset, &err);
793 if (!ret)
794 goto got_super;
795 }
796
797 goto err;
798
799 got_super:
800 if (le16_to_cpu(sb->sb->block_size) << 9 <
801 bdev_logical_block_size(sb->bdev) &&
802 opt_get(*opts, direct_io)) {
803 #ifndef __KERNEL__
804 opt_set(*opts, direct_io, false);
805 bch2_free_super(sb);
806 goto retry;
807 #endif
808 prt_printf(&err, "block size (%u) smaller than device block size (%u)",
809 le16_to_cpu(sb->sb->block_size) << 9,
810 bdev_logical_block_size(sb->bdev));
811 ret = -BCH_ERR_block_size_too_small;
812 goto err;
813 }
814
815 sb->have_layout = true;
816
817 ret = bch2_sb_validate(sb, &err, READ);
818 if (ret) {
819 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error validating superblock: %s\n",
820 path, err.buf);
821 goto err_no_print;
822 }
823 out:
824 printbuf_exit(&err);
825 return ret;
826 err:
827 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error reading superblock: %s\n",
828 path, err.buf);
829 err_no_print:
830 bch2_free_super(sb);
831 goto out;
832 }
833
834 int bch2_read_super(const char *path, struct bch_opts *opts,
835 struct bch_sb_handle *sb)
836 {
837 return __bch2_read_super(path, opts, sb, false);
838 }
839
840 /* provide a silenced version for mount.bcachefs */
841
842 int bch2_read_super_silent(const char *path, struct bch_opts *opts,
843 struct bch_sb_handle *sb)
844 {
845 return __bch2_read_super(path, opts, sb, true);
846 }
847
848 /* write superblock: */
849
850 static void write_super_endio(struct bio *bio)
851 {
852 struct bch_dev *ca = bio->bi_private;
853
854 /* XXX: return errors directly */
855
856 if (bch2_dev_io_err_on(bio->bi_status, ca,
857 bio_data_dir(bio)
858 ? BCH_MEMBER_ERROR_write
859 : BCH_MEMBER_ERROR_read,
860 "superblock %s error: %s",
861 bio_data_dir(bio) ? "write" : "read",
862 bch2_blk_status_to_str(bio->bi_status)))
863 ca->sb_write_error = 1;
864
865 closure_put(&ca->fs->sb_write);
866 percpu_ref_put(&ca->io_ref);
867 }
868
869 static void read_back_super(struct bch_fs *c, struct bch_dev *ca)
870 {
871 struct bch_sb *sb = ca->disk_sb.sb;
872 struct bio *bio = ca->disk_sb.bio;
873
874 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
875 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]);
876 bio->bi_end_io = write_super_endio;
877 bio->bi_private = ca;
878 bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE);
879
880 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb],
881 bio_sectors(bio));
882
883 percpu_ref_get(&ca->io_ref);
884 closure_bio_submit(bio, &c->sb_write);
885 }
886
887 static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx)
888 {
889 struct bch_sb *sb = ca->disk_sb.sb;
890 struct bio *bio = ca->disk_sb.bio;
891
892 sb->offset = sb->layout.sb_offset[idx];
893
894 SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false));
895 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb),
896 null_nonce(), sb);
897
898 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META);
899 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset);
900 bio->bi_end_io = write_super_endio;
901 bio->bi_private = ca;
902 bch2_bio_map(bio, sb,
903 roundup((size_t) vstruct_bytes(sb),
904 bdev_logical_block_size(ca->disk_sb.bdev)));
905
906 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb],
907 bio_sectors(bio));
908
909 percpu_ref_get(&ca->io_ref);
910 closure_bio_submit(bio, &c->sb_write);
911 }
912
913 int bch2_write_super(struct bch_fs *c)
914 {
915 struct closure *cl = &c->sb_write;
916 struct printbuf err = PRINTBUF;
917 unsigned sb = 0, nr_wrote;
918 struct bch_devs_mask sb_written;
919 bool wrote, can_mount_without_written, can_mount_with_written;
920 unsigned degraded_flags = BCH_FORCE_IF_DEGRADED;
921 int ret = 0;
922
923 trace_and_count(c, write_super, c, _RET_IP_);
924
925 if (c->opts.very_degraded)
926 degraded_flags |= BCH_FORCE_IF_LOST;
927
928 lockdep_assert_held(&c->sb_lock);
929
930 closure_init_stack(cl);
931 memset(&sb_written, 0, sizeof(sb_written));
932
933 /* Make sure we're using the new magic numbers: */
934 c->disk_sb.sb->magic = BCHFS_MAGIC;
935 c->disk_sb.sb->layout.magic = BCHFS_MAGIC;
936
937 le64_add_cpu(&c->disk_sb.sb->seq, 1);
938
939 struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2);
940 for_each_online_member(c, ca)
941 __bch2_members_v2_get_mut(mi, ca->dev_idx)->seq = c->disk_sb.sb->seq;
942 c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds());
943
944 if (test_bit(BCH_FS_error, &c->flags))
945 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1);
946 if (test_bit(BCH_FS_topology_error, &c->flags))
947 SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1);
948
949 SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN);
950
951 bch2_sb_counters_from_cpu(c);
952 bch2_sb_members_from_cpu(c);
953 bch2_sb_members_cpy_v2_v1(&c->disk_sb);
954 bch2_sb_errors_from_cpu(c);
955 bch2_sb_downgrade_update(c);
956
957 for_each_online_member(c, ca)
958 bch2_sb_from_fs(c, ca);
959
960 for_each_online_member(c, ca) {
961 printbuf_reset(&err);
962
963 ret = bch2_sb_validate(&ca->disk_sb, &err, WRITE);
964 if (ret) {
965 bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf);
966 percpu_ref_put(&ca->io_ref);
967 goto out;
968 }
969 }
970
971 if (c->opts.nochanges)
972 goto out;
973
974 /*
975 * Defer writing the superblock until filesystem initialization is
976 * complete - don't write out a partly initialized superblock:
977 */
978 if (!BCH_SB_INITIALIZED(c->disk_sb.sb))
979 goto out;
980
981 if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) {
982 struct printbuf buf = PRINTBUF;
983 prt_printf(&buf, "attempting to write superblock that wasn't version downgraded (");
984 bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version));
985 prt_str(&buf, " > ");
986 bch2_version_to_text(&buf, bcachefs_metadata_version_current);
987 prt_str(&buf, ")");
988 bch2_fs_fatal_error(c, ": %s", buf.buf);
989 printbuf_exit(&buf);
990 return -BCH_ERR_sb_not_downgraded;
991 }
992
993 for_each_online_member(c, ca) {
994 __set_bit(ca->dev_idx, sb_written.d);
995 ca->sb_write_error = 0;
996 }
997
998 for_each_online_member(c, ca)
999 read_back_super(c, ca);
1000 closure_sync(cl);
1001
1002 for_each_online_member(c, ca) {
1003 if (ca->sb_write_error)
1004 continue;
1005
1006 if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) {
1007 bch2_fs_fatal_error(c,
1008 ": Superblock write was silently dropped! (seq %llu expected %llu)",
1009 le64_to_cpu(ca->sb_read_scratch->seq),
1010 ca->disk_sb.seq);
1011 percpu_ref_put(&ca->io_ref);
1012 ret = -BCH_ERR_erofs_sb_err;
1013 goto out;
1014 }
1015
1016 if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) {
1017 bch2_fs_fatal_error(c,
1018 ": Superblock modified by another process (seq %llu expected %llu)",
1019 le64_to_cpu(ca->sb_read_scratch->seq),
1020 ca->disk_sb.seq);
1021 percpu_ref_put(&ca->io_ref);
1022 ret = -BCH_ERR_erofs_sb_err;
1023 goto out;
1024 }
1025 }
1026
1027 do {
1028 wrote = false;
1029 for_each_online_member(c, ca)
1030 if (!ca->sb_write_error &&
1031 sb < ca->disk_sb.sb->layout.nr_superblocks) {
1032 write_one_super(c, ca, sb);
1033 wrote = true;
1034 }
1035 closure_sync(cl);
1036 sb++;
1037 } while (wrote);
1038
1039 for_each_online_member(c, ca) {
1040 if (ca->sb_write_error)
1041 __clear_bit(ca->dev_idx, sb_written.d);
1042 else
1043 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq);
1044 }
1045
1046 nr_wrote = dev_mask_nr(&sb_written);
1047
1048 can_mount_with_written =
1049 bch2_have_enough_devs(c, sb_written, degraded_flags, false);
1050
1051 for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++)
1052 sb_written.d[i] = ~sb_written.d[i];
1053
1054 can_mount_without_written =
1055 bch2_have_enough_devs(c, sb_written, degraded_flags, false);
1056
1057 /*
1058 * If we would be able to mount _without_ the devices we successfully
1059 * wrote superblocks to, we weren't able to write to enough devices:
1060 *
1061 * Exception: if we can mount without the successes because we haven't
1062 * written anything (new filesystem), we continue if we'd be able to
1063 * mount with the devices we did successfully write to:
1064 */
1065 if (bch2_fs_fatal_err_on(!nr_wrote ||
1066 !can_mount_with_written ||
1067 (can_mount_without_written &&
1068 !can_mount_with_written), c,
1069 ": Unable to write superblock to sufficient devices (from %ps)",
1070 (void *) _RET_IP_))
1071 ret = -1;
1072 out:
1073 /* Make new options visible after they're persistent: */
1074 bch2_sb_update(c);
1075 printbuf_exit(&err);
1076 return ret;
1077 }
1078
1079 void __bch2_check_set_feature(struct bch_fs *c, unsigned feat)
1080 {
1081 mutex_lock(&c->sb_lock);
1082 if (!(c->sb.features & (1ULL << feat))) {
1083 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat);
1084
1085 bch2_write_super(c);
1086 }
1087 mutex_unlock(&c->sb_lock);
1088 }
1089
1090 /* Downgrade if superblock is at a higher version than currently supported: */
1091 bool bch2_check_version_downgrade(struct bch_fs *c)
1092 {
1093 bool ret = bcachefs_metadata_version_current < c->sb.version;
1094
1095 lockdep_assert_held(&c->sb_lock);
1096
1097 /*
1098 * Downgrade, if superblock is at a higher version than currently
1099 * supported:
1100 *
1101 * c->sb will be checked before we write the superblock, so update it as
1102 * well:
1103 */
1104 if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) {
1105 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current);
1106 c->sb.version_upgrade_complete = bcachefs_metadata_version_current;
1107 }
1108 if (c->sb.version > bcachefs_metadata_version_current) {
1109 c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current);
1110 c->sb.version = bcachefs_metadata_version_current;
1111 }
1112 if (c->sb.version_min > bcachefs_metadata_version_current) {
1113 c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current);
1114 c->sb.version_min = bcachefs_metadata_version_current;
1115 }
1116 c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1);
1117 return ret;
1118 }
1119
1120 void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version)
1121 {
1122 lockdep_assert_held(&c->sb_lock);
1123
1124 if (BCH_VERSION_MAJOR(new_version) >
1125 BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version)))
1126 bch2_sb_field_resize(&c->disk_sb, downgrade, 0);
1127
1128 c->disk_sb.sb->version = cpu_to_le16(new_version);
1129 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL);
1130 }
1131
1132 static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f,
1133 struct printbuf *err)
1134 {
1135 if (vstruct_bytes(f) < 88) {
1136 prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88);
1137 return -BCH_ERR_invalid_sb_ext;
1138 }
1139
1140 return 0;
1141 }
1142
1143 static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb,
1144 struct bch_sb_field *f)
1145 {
1146 struct bch_sb_field_ext *e = field_to_type(f, ext);
1147
1148 prt_printf(out, "Recovery passes required:");
1149 prt_tab(out);
1150 prt_bitflags(out, bch2_recovery_passes,
1151 bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0])));
1152 prt_newline(out);
1153
1154 unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL);
1155 if (errors_silent) {
1156 le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8);
1157
1158 prt_printf(out, "Errors to silently fix:");
1159 prt_tab(out);
1160 prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, sizeof(e->errors_silent) * 8);
1161 prt_newline(out);
1162
1163 kfree(errors_silent);
1164 }
1165 }
1166
1167 static const struct bch_sb_field_ops bch_sb_field_ops_ext = {
1168 .validate = bch2_sb_ext_validate,
1169 .to_text = bch2_sb_ext_to_text,
1170 };
1171
1172 static const struct bch_sb_field_ops *bch2_sb_field_ops[] = {
1173 #define x(f, nr) \
1174 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f,
1175 BCH_SB_FIELDS()
1176 #undef x
1177 };
1178
1179 static const struct bch_sb_field_ops bch2_sb_field_null_ops;
1180
1181 static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type)
1182 {
1183 return likely(type < ARRAY_SIZE(bch2_sb_field_ops))
1184 ? bch2_sb_field_ops[type]
1185 : &bch2_sb_field_null_ops;
1186 }
1187
1188 static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f,
1189 struct printbuf *err)
1190 {
1191 unsigned type = le32_to_cpu(f->type);
1192 struct printbuf field_err = PRINTBUF;
1193 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type);
1194 int ret;
1195
1196 ret = ops->validate ? ops->validate(sb, f, &field_err) : 0;
1197 if (ret) {
1198 prt_printf(err, "Invalid superblock section %s: %s",
1199 bch2_sb_fields[type], field_err.buf);
1200 prt_newline(err);
1201 bch2_sb_field_to_text(err, sb, f);
1202 }
1203
1204 printbuf_exit(&field_err);
1205 return ret;
1206 }
1207
1208 void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
1209 struct bch_sb_field *f)
1210 {
1211 unsigned type = le32_to_cpu(f->type);
1212 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type);
1213
1214 if (!out->nr_tabstops)
1215 printbuf_tabstop_push(out, 32);
1216
1217 if (ops->to_text)
1218 ops->to_text(out, sb, f);
1219 }
1220
1221 void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
1222 struct bch_sb_field *f)
1223 {
1224 unsigned type = le32_to_cpu(f->type);
1225
1226 if (type < BCH_SB_FIELD_NR)
1227 prt_printf(out, "%s", bch2_sb_fields[type]);
1228 else
1229 prt_printf(out, "(unknown field %u)", type);
1230
1231 prt_printf(out, " (size %zu):", vstruct_bytes(f));
1232 prt_newline(out);
1233
1234 __bch2_sb_field_to_text(out, sb, f);
1235 }
1236
1237 void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l)
1238 {
1239 unsigned i;
1240
1241 prt_printf(out, "Type: %u", l->layout_type);
1242 prt_newline(out);
1243
1244 prt_str(out, "Superblock max size: ");
1245 prt_units_u64(out, 512 << l->sb_max_size_bits);
1246 prt_newline(out);
1247
1248 prt_printf(out, "Nr superblocks: %u", l->nr_superblocks);
1249 prt_newline(out);
1250
1251 prt_str(out, "Offsets: ");
1252 for (i = 0; i < l->nr_superblocks; i++) {
1253 if (i)
1254 prt_str(out, ", ");
1255 prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i]));
1256 }
1257 prt_newline(out);
1258 }
1259
1260 void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb,
1261 bool print_layout, unsigned fields)
1262 {
1263 u64 fields_have = 0;
1264 unsigned nr_devices = 0;
1265
1266 if (!out->nr_tabstops)
1267 printbuf_tabstop_push(out, 44);
1268
1269 for (int i = 0; i < sb->nr_devices; i++)
1270 nr_devices += bch2_dev_exists(sb, i);
1271
1272 prt_printf(out, "External UUID:");
1273 prt_tab(out);
1274 pr_uuid(out, sb->user_uuid.b);
1275 prt_newline(out);
1276
1277 prt_printf(out, "Internal UUID:");
1278 prt_tab(out);
1279 pr_uuid(out, sb->uuid.b);
1280 prt_newline(out);
1281
1282 prt_printf(out, "Magic number:");
1283 prt_tab(out);
1284 pr_uuid(out, sb->magic.b);
1285 prt_newline(out);
1286
1287 prt_str(out, "Device index:");
1288 prt_tab(out);
1289 prt_printf(out, "%u", sb->dev_idx);
1290 prt_newline(out);
1291
1292 prt_str(out, "Label:");
1293 prt_tab(out);
1294 prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label);
1295 prt_newline(out);
1296
1297 prt_str(out, "Version:");
1298 prt_tab(out);
1299 bch2_version_to_text(out, le16_to_cpu(sb->version));
1300 prt_newline(out);
1301
1302 prt_str(out, "Version upgrade complete:");
1303 prt_tab(out);
1304 bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb));
1305 prt_newline(out);
1306
1307 prt_printf(out, "Oldest version on disk:");
1308 prt_tab(out);
1309 bch2_version_to_text(out, le16_to_cpu(sb->version_min));
1310 prt_newline(out);
1311
1312 prt_printf(out, "Created:");
1313 prt_tab(out);
1314 if (sb->time_base_lo)
1315 bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC));
1316 else
1317 prt_printf(out, "(not set)");
1318 prt_newline(out);
1319
1320 prt_printf(out, "Sequence number:");
1321 prt_tab(out);
1322 prt_printf(out, "%llu", le64_to_cpu(sb->seq));
1323 prt_newline(out);
1324
1325 prt_printf(out, "Time of last write:");
1326 prt_tab(out);
1327 bch2_prt_datetime(out, le64_to_cpu(sb->write_time));
1328 prt_newline(out);
1329
1330 prt_printf(out, "Superblock size:");
1331 prt_tab(out);
1332 prt_units_u64(out, vstruct_bytes(sb));
1333 prt_str(out, "/");
1334 prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits);
1335 prt_newline(out);
1336
1337 prt_printf(out, "Clean:");
1338 prt_tab(out);
1339 prt_printf(out, "%llu", BCH_SB_CLEAN(sb));
1340 prt_newline(out);
1341
1342 prt_printf(out, "Devices:");
1343 prt_tab(out);
1344 prt_printf(out, "%u", nr_devices);
1345 prt_newline(out);
1346
1347 prt_printf(out, "Sections:");
1348 vstruct_for_each(sb, f)
1349 fields_have |= 1 << le32_to_cpu(f->type);
1350 prt_tab(out);
1351 prt_bitflags(out, bch2_sb_fields, fields_have);
1352 prt_newline(out);
1353
1354 prt_printf(out, "Features:");
1355 prt_tab(out);
1356 prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0]));
1357 prt_newline(out);
1358
1359 prt_printf(out, "Compat features:");
1360 prt_tab(out);
1361 prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0]));
1362 prt_newline(out);
1363
1364 prt_newline(out);
1365 prt_printf(out, "Options:");
1366 prt_newline(out);
1367 printbuf_indent_add(out, 2);
1368 {
1369 enum bch_opt_id id;
1370
1371 for (id = 0; id < bch2_opts_nr; id++) {
1372 const struct bch_option *opt = bch2_opt_table + id;
1373
1374 if (opt->get_sb != BCH2_NO_SB_OPT) {
1375 u64 v = bch2_opt_from_sb(sb, id);
1376
1377 prt_printf(out, "%s:", opt->attr.name);
1378 prt_tab(out);
1379 bch2_opt_to_text(out, NULL, sb, opt, v,
1380 OPT_HUMAN_READABLE|OPT_SHOW_FULL_LIST);
1381 prt_newline(out);
1382 }
1383 }
1384 }
1385
1386 printbuf_indent_sub(out, 2);
1387
1388 if (print_layout) {
1389 prt_newline(out);
1390 prt_printf(out, "layout:");
1391 prt_newline(out);
1392 printbuf_indent_add(out, 2);
1393 bch2_sb_layout_to_text(out, &sb->layout);
1394 printbuf_indent_sub(out, 2);
1395 }
1396
1397 vstruct_for_each(sb, f)
1398 if (fields & (1 << le32_to_cpu(f->type))) {
1399 prt_newline(out);
1400 bch2_sb_field_to_text(out, sb, f);
1401 }
1402 }
A mirror of Linus' kernel repository