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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
27static const struct blk_holder_ops bch2_sb_handle_bdev_ops = {
28};
29
30struct bch2_metadata_version {
31 u16 version;
32 const char *name;
33};
34
35static 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
44void 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
57unsigned 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
71const char * const bch2_sb_fields[] = {
72#define x(name, nr) #name,
73 BCH_SB_FIELDS()
74#undef x
75 NULL
76};
77
78static int bch2_sb_field_validate(struct bch_sb *, struct bch_sb_field *,
79 struct printbuf *);
80
81struct 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
92static 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
131void 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
142void bch2_free_super(struct bch_sb_handle *sb)
143{
144 kfree(sb->bio);
145 if (!IS_ERR_OR_NULL(sb->bdev_handle))
146 bdev_release(sb->bdev_handle);
147 kfree(sb->holder);
148 kfree(sb->sb_name);
149
150 kfree(sb->sb);
151 memset(sb, 0, sizeof(*sb));
152}
153
154int 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
213struct 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
248struct 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
261static 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
309static 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
347static 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 return 0;
474}
475
476/* device open: */
477
478static unsigned long le_ulong_to_cpu(unsigned long v)
479{
480 return sizeof(unsigned long) == 8
481 ? le64_to_cpu(v)
482 : le32_to_cpu(v);
483}
484
485static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr)
486{
487 BUG_ON(nr & (BITS_PER_TYPE(long) - 1));
488
489 for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++)
490 dst[i] = le_ulong_to_cpu(src[i]);
491}
492
493static void bch2_sb_update(struct bch_fs *c)
494{
495 struct bch_sb *src = c->disk_sb.sb;
496
497 lockdep_assert_held(&c->sb_lock);
498
499 c->sb.uuid = src->uuid;
500 c->sb.user_uuid = src->user_uuid;
501 c->sb.version = le16_to_cpu(src->version);
502 c->sb.version_min = le16_to_cpu(src->version_min);
503 c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src);
504 c->sb.nr_devices = src->nr_devices;
505 c->sb.clean = BCH_SB_CLEAN(src);
506 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src);
507
508 c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision);
509 c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit;
510
511 /* XXX this is wrong, we need a 96 or 128 bit integer type */
512 c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo),
513 c->sb.nsec_per_time_unit);
514 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi);
515
516 c->sb.features = le64_to_cpu(src->features[0]);
517 c->sb.compat = le64_to_cpu(src->compat[0]);
518
519 memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent));
520
521 struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext);
522 if (ext)
523 le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent,
524 sizeof(c->sb.errors_silent) * 8);
525
526 for_each_member_device(c, ca) {
527 struct bch_member m = bch2_sb_member_get(src, ca->dev_idx);
528 ca->mi = bch2_mi_to_cpu(&m);
529 }
530}
531
532static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src)
533{
534 struct bch_sb_field *src_f, *dst_f;
535 struct bch_sb *dst = dst_handle->sb;
536 unsigned i;
537
538 dst->version = src->version;
539 dst->version_min = src->version_min;
540 dst->seq = src->seq;
541 dst->uuid = src->uuid;
542 dst->user_uuid = src->user_uuid;
543 memcpy(dst->label, src->label, sizeof(dst->label));
544
545 dst->block_size = src->block_size;
546 dst->nr_devices = src->nr_devices;
547
548 dst->time_base_lo = src->time_base_lo;
549 dst->time_base_hi = src->time_base_hi;
550 dst->time_precision = src->time_precision;
551 dst->write_time = src->write_time;
552
553 memcpy(dst->flags, src->flags, sizeof(dst->flags));
554 memcpy(dst->features, src->features, sizeof(dst->features));
555 memcpy(dst->compat, src->compat, sizeof(dst->compat));
556
557 for (i = 0; i < BCH_SB_FIELD_NR; i++) {
558 int d;
559
560 if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS)
561 continue;
562
563 src_f = bch2_sb_field_get_id(src, i);
564 dst_f = bch2_sb_field_get_id(dst, i);
565
566 d = (src_f ? le32_to_cpu(src_f->u64s) : 0) -
567 (dst_f ? le32_to_cpu(dst_f->u64s) : 0);
568 if (d > 0) {
569 int ret = bch2_sb_realloc(dst_handle,
570 le32_to_cpu(dst_handle->sb->u64s) + d);
571
572 if (ret)
573 return ret;
574
575 dst = dst_handle->sb;
576 dst_f = bch2_sb_field_get_id(dst, i);
577 }
578
579 dst_f = __bch2_sb_field_resize(dst_handle, dst_f,
580 src_f ? le32_to_cpu(src_f->u64s) : 0);
581
582 if (src_f)
583 memcpy(dst_f, src_f, vstruct_bytes(src_f));
584 }
585
586 return 0;
587}
588
589int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src)
590{
591 int ret;
592
593 lockdep_assert_held(&c->sb_lock);
594
595 ret = bch2_sb_realloc(&c->disk_sb, 0) ?:
596 __copy_super(&c->disk_sb, src) ?:
597 bch2_sb_replicas_to_cpu_replicas(c) ?:
598 bch2_sb_disk_groups_to_cpu(c);
599 if (ret)
600 return ret;
601
602 bch2_sb_update(c);
603 return 0;
604}
605
606int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca)
607{
608 return __copy_super(&ca->disk_sb, c->disk_sb.sb);
609}
610
611/* read superblock: */
612
613static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err)
614{
615 size_t bytes;
616 int ret;
617reread:
618 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
619 sb->bio->bi_iter.bi_sector = offset;
620 bch2_bio_map(sb->bio, sb->sb, sb->buffer_size);
621
622 ret = submit_bio_wait(sb->bio);
623 if (ret) {
624 prt_printf(err, "IO error: %i", ret);
625 return ret;
626 }
627
628 if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) &&
629 !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) {
630 prt_str(err, "Not a bcachefs superblock (got magic ");
631 pr_uuid(err, sb->sb->magic.b);
632 prt_str(err, ")");
633 return -BCH_ERR_invalid_sb_magic;
634 }
635
636 ret = bch2_sb_compatible(sb->sb, err);
637 if (ret)
638 return ret;
639
640 bytes = vstruct_bytes(sb->sb);
641
642 if (bytes > 512 << sb->sb->layout.sb_max_size_bits) {
643 prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %lu)",
644 bytes, 512UL << sb->sb->layout.sb_max_size_bits);
645 return -BCH_ERR_invalid_sb_too_big;
646 }
647
648 if (bytes > sb->buffer_size) {
649 ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s));
650 if (ret)
651 return ret;
652 goto reread;
653 }
654
655 enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb);
656 if (csum_type >= BCH_CSUM_NR) {
657 prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb));
658 return -BCH_ERR_invalid_sb_csum_type;
659 }
660
661 /* XXX: verify MACs */
662 struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb);
663 if (bch2_crc_cmp(csum, sb->sb->csum)) {
664 bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum);
665 return -BCH_ERR_invalid_sb_csum;
666 }
667
668 sb->seq = le64_to_cpu(sb->sb->seq);
669
670 return 0;
671}
672
673static int __bch2_read_super(const char *path, struct bch_opts *opts,
674 struct bch_sb_handle *sb, bool ignore_notbchfs_msg)
675{
676 u64 offset = opt_get(*opts, sb);
677 struct bch_sb_layout layout;
678 struct printbuf err = PRINTBUF;
679 struct printbuf err2 = PRINTBUF;
680 __le64 *i;
681 int ret;
682#ifndef __KERNEL__
683retry:
684#endif
685 memset(sb, 0, sizeof(*sb));
686 sb->mode = BLK_OPEN_READ;
687 sb->have_bio = true;
688 sb->holder = kmalloc(1, GFP_KERNEL);
689 if (!sb->holder)
690 return -ENOMEM;
691
692 sb->sb_name = kstrdup(path, GFP_KERNEL);
693 if (!sb->sb_name)
694 return -ENOMEM;
695
696#ifndef __KERNEL__
697 if (opt_get(*opts, direct_io) == false)
698 sb->mode |= BLK_OPEN_BUFFERED;
699#endif
700
701 if (!opt_get(*opts, noexcl))
702 sb->mode |= BLK_OPEN_EXCL;
703
704 if (!opt_get(*opts, nochanges))
705 sb->mode |= BLK_OPEN_WRITE;
706
707 sb->bdev_handle = bdev_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops);
708 if (IS_ERR(sb->bdev_handle) &&
709 PTR_ERR(sb->bdev_handle) == -EACCES &&
710 opt_get(*opts, read_only)) {
711 sb->mode &= ~BLK_OPEN_WRITE;
712
713 sb->bdev_handle = bdev_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops);
714 if (!IS_ERR(sb->bdev_handle))
715 opt_set(*opts, nochanges, true);
716 }
717
718 if (IS_ERR(sb->bdev_handle)) {
719 ret = PTR_ERR(sb->bdev_handle);
720 goto err;
721 }
722 sb->bdev = sb->bdev_handle->bdev;
723
724 ret = bch2_sb_realloc(sb, 0);
725 if (ret) {
726 prt_printf(&err, "error allocating memory for superblock");
727 goto err;
728 }
729
730 if (bch2_fs_init_fault("read_super")) {
731 prt_printf(&err, "dynamic fault");
732 ret = -EFAULT;
733 goto err;
734 }
735
736 ret = read_one_super(sb, offset, &err);
737 if (!ret)
738 goto got_super;
739
740 if (opt_defined(*opts, sb))
741 goto err;
742
743 prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n",
744 path, err.buf);
745 if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg)
746 printk(KERN_INFO "%s", err2.buf);
747 else
748 printk(KERN_ERR "%s", err2.buf);
749
750 printbuf_exit(&err2);
751 printbuf_reset(&err);
752
753 /*
754 * Error reading primary superblock - read location of backup
755 * superblocks:
756 */
757 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
758 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR;
759 /*
760 * use sb buffer to read layout, since sb buffer is page aligned but
761 * layout won't be:
762 */
763 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout));
764
765 ret = submit_bio_wait(sb->bio);
766 if (ret) {
767 prt_printf(&err, "IO error: %i", ret);
768 goto err;
769 }
770
771 memcpy(&layout, sb->sb, sizeof(layout));
772 ret = validate_sb_layout(&layout, &err);
773 if (ret)
774 goto err;
775
776 for (i = layout.sb_offset;
777 i < layout.sb_offset + layout.nr_superblocks; i++) {
778 offset = le64_to_cpu(*i);
779
780 if (offset == opt_get(*opts, sb))
781 continue;
782
783 ret = read_one_super(sb, offset, &err);
784 if (!ret)
785 goto got_super;
786 }
787
788 goto err;
789
790got_super:
791 if (le16_to_cpu(sb->sb->block_size) << 9 <
792 bdev_logical_block_size(sb->bdev) &&
793 opt_get(*opts, direct_io)) {
794#ifndef __KERNEL__
795 opt_set(*opts, direct_io, false);
796 bch2_free_super(sb);
797 goto retry;
798#endif
799 prt_printf(&err, "block size (%u) smaller than device block size (%u)",
800 le16_to_cpu(sb->sb->block_size) << 9,
801 bdev_logical_block_size(sb->bdev));
802 ret = -BCH_ERR_block_size_too_small;
803 goto err;
804 }
805
806 ret = 0;
807 sb->have_layout = true;
808
809 ret = bch2_sb_validate(sb, &err, READ);
810 if (ret) {
811 printk(KERN_ERR "bcachefs (%s): error validating superblock: %s\n",
812 path, err.buf);
813 goto err_no_print;
814 }
815out:
816 printbuf_exit(&err);
817 return ret;
818err:
819 printk(KERN_ERR "bcachefs (%s): error reading superblock: %s\n",
820 path, err.buf);
821err_no_print:
822 bch2_free_super(sb);
823 goto out;
824}
825
826int bch2_read_super(const char *path, struct bch_opts *opts,
827 struct bch_sb_handle *sb)
828{
829 return __bch2_read_super(path, opts, sb, false);
830}
831
832/* provide a silenced version for mount.bcachefs */
833
834int bch2_read_super_silent(const char *path, struct bch_opts *opts,
835 struct bch_sb_handle *sb)
836{
837 return __bch2_read_super(path, opts, sb, true);
838}
839
840/* write superblock: */
841
842static void write_super_endio(struct bio *bio)
843{
844 struct bch_dev *ca = bio->bi_private;
845
846 /* XXX: return errors directly */
847
848 if (bch2_dev_io_err_on(bio->bi_status, ca,
849 bio_data_dir(bio)
850 ? BCH_MEMBER_ERROR_write
851 : BCH_MEMBER_ERROR_read,
852 "superblock %s error: %s",
853 bio_data_dir(bio) ? "write" : "read",
854 bch2_blk_status_to_str(bio->bi_status)))
855 ca->sb_write_error = 1;
856
857 closure_put(&ca->fs->sb_write);
858 percpu_ref_put(&ca->io_ref);
859}
860
861static void read_back_super(struct bch_fs *c, struct bch_dev *ca)
862{
863 struct bch_sb *sb = ca->disk_sb.sb;
864 struct bio *bio = ca->disk_sb.bio;
865
866 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META);
867 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]);
868 bio->bi_end_io = write_super_endio;
869 bio->bi_private = ca;
870 bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE);
871
872 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb],
873 bio_sectors(bio));
874
875 percpu_ref_get(&ca->io_ref);
876 closure_bio_submit(bio, &c->sb_write);
877}
878
879static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx)
880{
881 struct bch_sb *sb = ca->disk_sb.sb;
882 struct bio *bio = ca->disk_sb.bio;
883
884 sb->offset = sb->layout.sb_offset[idx];
885
886 SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false));
887 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb),
888 null_nonce(), sb);
889
890 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META);
891 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset);
892 bio->bi_end_io = write_super_endio;
893 bio->bi_private = ca;
894 bch2_bio_map(bio, sb,
895 roundup((size_t) vstruct_bytes(sb),
896 bdev_logical_block_size(ca->disk_sb.bdev)));
897
898 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb],
899 bio_sectors(bio));
900
901 percpu_ref_get(&ca->io_ref);
902 closure_bio_submit(bio, &c->sb_write);
903}
904
905int bch2_write_super(struct bch_fs *c)
906{
907 struct closure *cl = &c->sb_write;
908 struct printbuf err = PRINTBUF;
909 unsigned sb = 0, nr_wrote;
910 struct bch_devs_mask sb_written;
911 bool wrote, can_mount_without_written, can_mount_with_written;
912 unsigned degraded_flags = BCH_FORCE_IF_DEGRADED;
913 int ret = 0;
914
915 trace_and_count(c, write_super, c, _RET_IP_);
916
917 if (c->opts.very_degraded)
918 degraded_flags |= BCH_FORCE_IF_LOST;
919
920 lockdep_assert_held(&c->sb_lock);
921
922 closure_init_stack(cl);
923 memset(&sb_written, 0, sizeof(sb_written));
924
925 /* Make sure we're using the new magic numbers: */
926 c->disk_sb.sb->magic = BCHFS_MAGIC;
927 c->disk_sb.sb->layout.magic = BCHFS_MAGIC;
928
929 le64_add_cpu(&c->disk_sb.sb->seq, 1);
930
931 struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2);
932 for_each_online_member(c, ca)
933 __bch2_members_v2_get_mut(mi, ca->dev_idx)->seq = c->disk_sb.sb->seq;
934 c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds());
935
936 if (test_bit(BCH_FS_error, &c->flags))
937 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1);
938 if (test_bit(BCH_FS_topology_error, &c->flags))
939 SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1);
940
941 SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN);
942
943 bch2_sb_counters_from_cpu(c);
944 bch2_sb_members_from_cpu(c);
945 bch2_sb_members_cpy_v2_v1(&c->disk_sb);
946 bch2_sb_errors_from_cpu(c);
947 bch2_sb_downgrade_update(c);
948
949 for_each_online_member(c, ca)
950 bch2_sb_from_fs(c, ca);
951
952 for_each_online_member(c, ca) {
953 printbuf_reset(&err);
954
955 ret = bch2_sb_validate(&ca->disk_sb, &err, WRITE);
956 if (ret) {
957 bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf);
958 percpu_ref_put(&ca->io_ref);
959 goto out;
960 }
961 }
962
963 if (c->opts.nochanges)
964 goto out;
965
966 /*
967 * Defer writing the superblock until filesystem initialization is
968 * complete - don't write out a partly initialized superblock:
969 */
970 if (!BCH_SB_INITIALIZED(c->disk_sb.sb))
971 goto out;
972
973 if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) {
974 struct printbuf buf = PRINTBUF;
975 prt_printf(&buf, "attempting to write superblock that wasn't version downgraded (");
976 bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version));
977 prt_str(&buf, " > ");
978 bch2_version_to_text(&buf, bcachefs_metadata_version_current);
979 prt_str(&buf, ")");
980 bch2_fs_fatal_error(c, "%s", buf.buf);
981 printbuf_exit(&buf);
982 return -BCH_ERR_sb_not_downgraded;
983 }
984
985 for_each_online_member(c, ca) {
986 __set_bit(ca->dev_idx, sb_written.d);
987 ca->sb_write_error = 0;
988 }
989
990 for_each_online_member(c, ca)
991 read_back_super(c, ca);
992 closure_sync(cl);
993
994 for_each_online_member(c, ca) {
995 if (ca->sb_write_error)
996 continue;
997
998 if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) {
999 bch2_fs_fatal_error(c,
1000 "Superblock write was silently dropped! (seq %llu expected %llu)",
1001 le64_to_cpu(ca->sb_read_scratch->seq),
1002 ca->disk_sb.seq);
1003 percpu_ref_put(&ca->io_ref);
1004 ret = -BCH_ERR_erofs_sb_err;
1005 goto out;
1006 }
1007
1008 if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) {
1009 bch2_fs_fatal_error(c,
1010 "Superblock modified by another process (seq %llu expected %llu)",
1011 le64_to_cpu(ca->sb_read_scratch->seq),
1012 ca->disk_sb.seq);
1013 percpu_ref_put(&ca->io_ref);
1014 ret = -BCH_ERR_erofs_sb_err;
1015 goto out;
1016 }
1017 }
1018
1019 do {
1020 wrote = false;
1021 for_each_online_member(c, ca)
1022 if (!ca->sb_write_error &&
1023 sb < ca->disk_sb.sb->layout.nr_superblocks) {
1024 write_one_super(c, ca, sb);
1025 wrote = true;
1026 }
1027 closure_sync(cl);
1028 sb++;
1029 } while (wrote);
1030
1031 for_each_online_member(c, ca) {
1032 if (ca->sb_write_error)
1033 __clear_bit(ca->dev_idx, sb_written.d);
1034 else
1035 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq);
1036 }
1037
1038 nr_wrote = dev_mask_nr(&sb_written);
1039
1040 can_mount_with_written =
1041 bch2_have_enough_devs(c, sb_written, degraded_flags, false);
1042
1043 for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++)
1044 sb_written.d[i] = ~sb_written.d[i];
1045
1046 can_mount_without_written =
1047 bch2_have_enough_devs(c, sb_written, degraded_flags, false);
1048
1049 /*
1050 * If we would be able to mount _without_ the devices we successfully
1051 * wrote superblocks to, we weren't able to write to enough devices:
1052 *
1053 * Exception: if we can mount without the successes because we haven't
1054 * written anything (new filesystem), we continue if we'd be able to
1055 * mount with the devices we did successfully write to:
1056 */
1057 if (bch2_fs_fatal_err_on(!nr_wrote ||
1058 !can_mount_with_written ||
1059 (can_mount_without_written &&
1060 !can_mount_with_written), c,
1061 "Unable to write superblock to sufficient devices (from %ps)",
1062 (void *) _RET_IP_))
1063 ret = -1;
1064out:
1065 /* Make new options visible after they're persistent: */
1066 bch2_sb_update(c);
1067 printbuf_exit(&err);
1068 return ret;
1069}
1070
1071void __bch2_check_set_feature(struct bch_fs *c, unsigned feat)
1072{
1073 mutex_lock(&c->sb_lock);
1074 if (!(c->sb.features & (1ULL << feat))) {
1075 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat);
1076
1077 bch2_write_super(c);
1078 }
1079 mutex_unlock(&c->sb_lock);
1080}
1081
1082/* Downgrade if superblock is at a higher version than currently supported: */
1083bool bch2_check_version_downgrade(struct bch_fs *c)
1084{
1085 bool ret = bcachefs_metadata_version_current < c->sb.version;
1086
1087 lockdep_assert_held(&c->sb_lock);
1088
1089 /*
1090 * Downgrade, if superblock is at a higher version than currently
1091 * supported:
1092 *
1093 * c->sb will be checked before we write the superblock, so update it as
1094 * well:
1095 */
1096 if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) {
1097 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current);
1098 c->sb.version_upgrade_complete = bcachefs_metadata_version_current;
1099 }
1100 if (c->sb.version > bcachefs_metadata_version_current) {
1101 c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current);
1102 c->sb.version = bcachefs_metadata_version_current;
1103 }
1104 if (c->sb.version_min > bcachefs_metadata_version_current) {
1105 c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current);
1106 c->sb.version_min = bcachefs_metadata_version_current;
1107 }
1108 c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1);
1109 return ret;
1110}
1111
1112void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version)
1113{
1114 lockdep_assert_held(&c->sb_lock);
1115
1116 if (BCH_VERSION_MAJOR(new_version) >
1117 BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version)))
1118 bch2_sb_field_resize(&c->disk_sb, downgrade, 0);
1119
1120 c->disk_sb.sb->version = cpu_to_le16(new_version);
1121 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL);
1122}
1123
1124static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f,
1125 struct printbuf *err)
1126{
1127 if (vstruct_bytes(f) < 88) {
1128 prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88);
1129 return -BCH_ERR_invalid_sb_ext;
1130 }
1131
1132 return 0;
1133}
1134
1135static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb,
1136 struct bch_sb_field *f)
1137{
1138 struct bch_sb_field_ext *e = field_to_type(f, ext);
1139
1140 prt_printf(out, "Recovery passes required:");
1141 prt_tab(out);
1142 prt_bitflags(out, bch2_recovery_passes,
1143 bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0])));
1144 prt_newline(out);
1145
1146 unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL);
1147 if (errors_silent) {
1148 le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8);
1149
1150 prt_printf(out, "Errors to silently fix:");
1151 prt_tab(out);
1152 prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, sizeof(e->errors_silent) * 8);
1153 prt_newline(out);
1154
1155 kfree(errors_silent);
1156 }
1157}
1158
1159static const struct bch_sb_field_ops bch_sb_field_ops_ext = {
1160 .validate = bch2_sb_ext_validate,
1161 .to_text = bch2_sb_ext_to_text,
1162};
1163
1164static const struct bch_sb_field_ops *bch2_sb_field_ops[] = {
1165#define x(f, nr) \
1166 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f,
1167 BCH_SB_FIELDS()
1168#undef x
1169};
1170
1171static const struct bch_sb_field_ops bch2_sb_field_null_ops;
1172
1173static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type)
1174{
1175 return likely(type < ARRAY_SIZE(bch2_sb_field_ops))
1176 ? bch2_sb_field_ops[type]
1177 : &bch2_sb_field_null_ops;
1178}
1179
1180static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f,
1181 struct printbuf *err)
1182{
1183 unsigned type = le32_to_cpu(f->type);
1184 struct printbuf field_err = PRINTBUF;
1185 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type);
1186 int ret;
1187
1188 ret = ops->validate ? ops->validate(sb, f, &field_err) : 0;
1189 if (ret) {
1190 prt_printf(err, "Invalid superblock section %s: %s",
1191 bch2_sb_fields[type], field_err.buf);
1192 prt_newline(err);
1193 bch2_sb_field_to_text(err, sb, f);
1194 }
1195
1196 printbuf_exit(&field_err);
1197 return ret;
1198}
1199
1200void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
1201 struct bch_sb_field *f)
1202{
1203 unsigned type = le32_to_cpu(f->type);
1204 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type);
1205
1206 if (!out->nr_tabstops)
1207 printbuf_tabstop_push(out, 32);
1208
1209 if (ops->to_text)
1210 ops->to_text(out, sb, f);
1211}
1212
1213void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
1214 struct bch_sb_field *f)
1215{
1216 unsigned type = le32_to_cpu(f->type);
1217
1218 if (type < BCH_SB_FIELD_NR)
1219 prt_printf(out, "%s", bch2_sb_fields[type]);
1220 else
1221 prt_printf(out, "(unknown field %u)", type);
1222
1223 prt_printf(out, " (size %zu):", vstruct_bytes(f));
1224 prt_newline(out);
1225
1226 __bch2_sb_field_to_text(out, sb, f);
1227}
1228
1229void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l)
1230{
1231 unsigned i;
1232
1233 prt_printf(out, "Type: %u", l->layout_type);
1234 prt_newline(out);
1235
1236 prt_str(out, "Superblock max size: ");
1237 prt_units_u64(out, 512 << l->sb_max_size_bits);
1238 prt_newline(out);
1239
1240 prt_printf(out, "Nr superblocks: %u", l->nr_superblocks);
1241 prt_newline(out);
1242
1243 prt_str(out, "Offsets: ");
1244 for (i = 0; i < l->nr_superblocks; i++) {
1245 if (i)
1246 prt_str(out, ", ");
1247 prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i]));
1248 }
1249 prt_newline(out);
1250}
1251
1252void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb,
1253 bool print_layout, unsigned fields)
1254{
1255 u64 fields_have = 0;
1256 unsigned nr_devices = 0;
1257
1258 if (!out->nr_tabstops)
1259 printbuf_tabstop_push(out, 44);
1260
1261 for (int i = 0; i < sb->nr_devices; i++)
1262 nr_devices += bch2_dev_exists(sb, i);
1263
1264 prt_printf(out, "External UUID:");
1265 prt_tab(out);
1266 pr_uuid(out, sb->user_uuid.b);
1267 prt_newline(out);
1268
1269 prt_printf(out, "Internal UUID:");
1270 prt_tab(out);
1271 pr_uuid(out, sb->uuid.b);
1272 prt_newline(out);
1273
1274 prt_printf(out, "Magic number:");
1275 prt_tab(out);
1276 pr_uuid(out, sb->magic.b);
1277 prt_newline(out);
1278
1279 prt_str(out, "Device index:");
1280 prt_tab(out);
1281 prt_printf(out, "%u", sb->dev_idx);
1282 prt_newline(out);
1283
1284 prt_str(out, "Label:");
1285 prt_tab(out);
1286 prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label);
1287 prt_newline(out);
1288
1289 prt_str(out, "Version:");
1290 prt_tab(out);
1291 bch2_version_to_text(out, le16_to_cpu(sb->version));
1292 prt_newline(out);
1293
1294 prt_str(out, "Version upgrade complete:");
1295 prt_tab(out);
1296 bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb));
1297 prt_newline(out);
1298
1299 prt_printf(out, "Oldest version on disk:");
1300 prt_tab(out);
1301 bch2_version_to_text(out, le16_to_cpu(sb->version_min));
1302 prt_newline(out);
1303
1304 prt_printf(out, "Created:");
1305 prt_tab(out);
1306 if (sb->time_base_lo)
1307 bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC));
1308 else
1309 prt_printf(out, "(not set)");
1310 prt_newline(out);
1311
1312 prt_printf(out, "Sequence number:");
1313 prt_tab(out);
1314 prt_printf(out, "%llu", le64_to_cpu(sb->seq));
1315 prt_newline(out);
1316
1317 prt_printf(out, "Time of last write:");
1318 prt_tab(out);
1319 bch2_prt_datetime(out, le64_to_cpu(sb->write_time));
1320 prt_newline(out);
1321
1322 prt_printf(out, "Superblock size:");
1323 prt_tab(out);
1324 prt_units_u64(out, vstruct_bytes(sb));
1325 prt_str(out, "/");
1326 prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits);
1327 prt_newline(out);
1328
1329 prt_printf(out, "Clean:");
1330 prt_tab(out);
1331 prt_printf(out, "%llu", BCH_SB_CLEAN(sb));
1332 prt_newline(out);
1333
1334 prt_printf(out, "Devices:");
1335 prt_tab(out);
1336 prt_printf(out, "%u", nr_devices);
1337 prt_newline(out);
1338
1339 prt_printf(out, "Sections:");
1340 vstruct_for_each(sb, f)
1341 fields_have |= 1 << le32_to_cpu(f->type);
1342 prt_tab(out);
1343 prt_bitflags(out, bch2_sb_fields, fields_have);
1344 prt_newline(out);
1345
1346 prt_printf(out, "Features:");
1347 prt_tab(out);
1348 prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0]));
1349 prt_newline(out);
1350
1351 prt_printf(out, "Compat features:");
1352 prt_tab(out);
1353 prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0]));
1354 prt_newline(out);
1355
1356 prt_newline(out);
1357 prt_printf(out, "Options:");
1358 prt_newline(out);
1359 printbuf_indent_add(out, 2);
1360 {
1361 enum bch_opt_id id;
1362
1363 for (id = 0; id < bch2_opts_nr; id++) {
1364 const struct bch_option *opt = bch2_opt_table + id;
1365
1366 if (opt->get_sb != BCH2_NO_SB_OPT) {
1367 u64 v = bch2_opt_from_sb(sb, id);
1368
1369 prt_printf(out, "%s:", opt->attr.name);
1370 prt_tab(out);
1371 bch2_opt_to_text(out, NULL, sb, opt, v,
1372 OPT_HUMAN_READABLE|OPT_SHOW_FULL_LIST);
1373 prt_newline(out);
1374 }
1375 }
1376 }
1377
1378 printbuf_indent_sub(out, 2);
1379
1380 if (print_layout) {
1381 prt_newline(out);
1382 prt_printf(out, "layout:");
1383 prt_newline(out);
1384 printbuf_indent_add(out, 2);
1385 bch2_sb_layout_to_text(out, &sb->layout);
1386 printbuf_indent_sub(out, 2);
1387 }
1388
1389 vstruct_for_each(sb, f)
1390 if (fields & (1 << le32_to_cpu(f->type))) {
1391 prt_newline(out);
1392 bch2_sb_field_to_text(out, sb, f);
1393 }
1394}