1 // SPDX-License-Identifier: GPL-2.0
6 #include "disk_groups.h"
11 #include "journal_seq_blacklist.h"
18 #include <linux/backing-dev.h>
19 #include <linux/sort.h>
21 const char * const bch2_sb_fields[] = {
22 #define x(name, nr) #name,
28 static const char *bch2_sb_field_validate(struct bch_sb *,
29 struct bch_sb_field *);
31 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *sb,
32 enum bch_sb_field_type type)
34 struct bch_sb_field *f;
36 /* XXX: need locking around superblock to access optional fields */
38 vstruct_for_each(sb, f)
39 if (le32_to_cpu(f->type) == type)
44 static struct bch_sb_field *__bch2_sb_field_resize(struct bch_sb_handle *sb,
45 struct bch_sb_field *f,
48 unsigned old_u64s = f ? le32_to_cpu(f->u64s) : 0;
49 unsigned sb_u64s = le32_to_cpu(sb->sb->u64s) + u64s - old_u64s;
51 BUG_ON(get_order(__vstruct_bytes(struct bch_sb, sb_u64s)) >
55 f = vstruct_last(sb->sb);
56 memset(f, 0, sizeof(u64) * u64s);
57 f->u64s = cpu_to_le32(u64s);
65 f->u64s = cpu_to_le32(u64s);
71 memmove(dst, src, vstruct_end(sb->sb) - src);
74 memset(src, 0, dst - src);
77 sb->sb->u64s = cpu_to_le32(sb_u64s);
79 return u64s ? f : NULL;
82 void bch2_sb_field_delete(struct bch_sb_handle *sb,
83 enum bch_sb_field_type type)
85 struct bch_sb_field *f = bch2_sb_field_get(sb->sb, type);
88 __bch2_sb_field_resize(sb, f, 0);
91 /* Superblock realloc/free: */
93 void bch2_free_super(struct bch_sb_handle *sb)
97 if (!IS_ERR_OR_NULL(sb->bdev))
98 blkdev_put(sb->bdev, sb->mode);
100 free_pages((unsigned long) sb->sb, sb->page_order);
101 memset(sb, 0, sizeof(*sb));
104 int bch2_sb_realloc(struct bch_sb_handle *sb, unsigned u64s)
106 size_t new_bytes = __vstruct_bytes(struct bch_sb, u64s);
107 unsigned order = get_order(new_bytes);
108 struct bch_sb *new_sb;
111 if (sb->sb && sb->page_order >= order)
114 if (sb->have_layout) {
115 u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits;
117 if (new_bytes > max_bytes) {
118 char buf[BDEVNAME_SIZE];
120 pr_err("%s: superblock too big: want %zu but have %llu",
121 bdevname(sb->bdev, buf), new_bytes, max_bytes);
126 if (sb->page_order >= order && sb->sb)
129 if (dynamic_fault("bcachefs:add:super_realloc"))
133 bio = bio_kmalloc(GFP_KERNEL, 1 << order);
142 new_sb = (void *) __get_free_pages(GFP_NOFS|__GFP_ZERO, order);
147 memcpy(new_sb, sb->sb, PAGE_SIZE << sb->page_order);
149 free_pages((unsigned long) sb->sb, sb->page_order);
152 sb->page_order = order;
157 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *sb,
158 enum bch_sb_field_type type,
161 struct bch_sb_field *f = bch2_sb_field_get(sb->sb, type);
162 ssize_t old_u64s = f ? le32_to_cpu(f->u64s) : 0;
163 ssize_t d = -old_u64s + u64s;
165 if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s) + d))
169 struct bch_fs *c = container_of(sb, struct bch_fs, disk_sb);
173 lockdep_assert_held(&c->sb_lock);
175 /* XXX: we're not checking that offline device have enough space */
177 for_each_online_member(ca, c, i) {
178 struct bch_sb_handle *sb = &ca->disk_sb;
180 if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s) + d)) {
181 percpu_ref_put(&ca->ref);
187 f = bch2_sb_field_get(sb->sb, type);
188 f = __bch2_sb_field_resize(sb, f, u64s);
190 f->type = cpu_to_le32(type);
194 /* Superblock validate: */
196 static inline void __bch2_sb_layout_size_assert(void)
198 BUILD_BUG_ON(sizeof(struct bch_sb_layout) != 512);
201 static const char *validate_sb_layout(struct bch_sb_layout *layout)
203 u64 offset, prev_offset, max_sectors;
206 if (uuid_le_cmp(layout->magic, BCACHE_MAGIC))
207 return "Not a bcachefs superblock layout";
209 if (layout->layout_type != 0)
210 return "Invalid superblock layout type";
212 if (!layout->nr_superblocks)
213 return "Invalid superblock layout: no superblocks";
215 if (layout->nr_superblocks > ARRAY_SIZE(layout->sb_offset))
216 return "Invalid superblock layout: too many superblocks";
218 max_sectors = 1 << layout->sb_max_size_bits;
220 prev_offset = le64_to_cpu(layout->sb_offset[0]);
222 for (i = 1; i < layout->nr_superblocks; i++) {
223 offset = le64_to_cpu(layout->sb_offset[i]);
225 if (offset < prev_offset + max_sectors)
226 return "Invalid superblock layout: superblocks overlap";
227 prev_offset = offset;
233 const char *bch2_sb_validate(struct bch_sb_handle *disk_sb)
235 struct bch_sb *sb = disk_sb->sb;
236 struct bch_sb_field *f;
237 struct bch_sb_field_members *mi;
239 u32 version, version_min;
242 version = le16_to_cpu(sb->version);
243 version_min = version >= bcachefs_metadata_version_new_versioning
244 ? le16_to_cpu(sb->version_min)
247 if (version >= bcachefs_metadata_version_max ||
248 version_min < bcachefs_metadata_version_min)
249 return "Unsupported superblock version";
251 if (version_min > version)
252 return "Bad minimum version";
254 if (sb->features[1] ||
255 (le64_to_cpu(sb->features[0]) & (~0ULL << BCH_FEATURE_NR)))
256 return "Filesystem has incompatible features";
258 block_size = le16_to_cpu(sb->block_size);
260 if (!is_power_of_2(block_size) ||
261 block_size > PAGE_SECTORS)
262 return "Bad block size";
264 if (bch2_is_zero(sb->user_uuid.b, sizeof(uuid_le)))
265 return "Bad user UUID";
267 if (bch2_is_zero(sb->uuid.b, sizeof(uuid_le)))
268 return "Bad internal UUID";
270 if (!sb->nr_devices ||
271 sb->nr_devices <= sb->dev_idx ||
272 sb->nr_devices > BCH_SB_MEMBERS_MAX)
273 return "Bad number of member devices";
275 if (!BCH_SB_META_REPLICAS_WANT(sb) ||
276 BCH_SB_META_REPLICAS_WANT(sb) >= BCH_REPLICAS_MAX)
277 return "Invalid number of metadata replicas";
279 if (!BCH_SB_META_REPLICAS_REQ(sb) ||
280 BCH_SB_META_REPLICAS_REQ(sb) >= BCH_REPLICAS_MAX)
281 return "Invalid number of metadata replicas";
283 if (!BCH_SB_DATA_REPLICAS_WANT(sb) ||
284 BCH_SB_DATA_REPLICAS_WANT(sb) >= BCH_REPLICAS_MAX)
285 return "Invalid number of data replicas";
287 if (!BCH_SB_DATA_REPLICAS_REQ(sb) ||
288 BCH_SB_DATA_REPLICAS_REQ(sb) >= BCH_REPLICAS_MAX)
289 return "Invalid number of data replicas";
291 if (BCH_SB_META_CSUM_TYPE(sb) >= BCH_CSUM_OPT_NR)
292 return "Invalid metadata checksum type";
294 if (BCH_SB_DATA_CSUM_TYPE(sb) >= BCH_CSUM_OPT_NR)
295 return "Invalid metadata checksum type";
297 if (BCH_SB_COMPRESSION_TYPE(sb) >= BCH_COMPRESSION_OPT_NR)
298 return "Invalid compression type";
300 if (!BCH_SB_BTREE_NODE_SIZE(sb))
301 return "Btree node size not set";
303 if (!is_power_of_2(BCH_SB_BTREE_NODE_SIZE(sb)))
304 return "Btree node size not a power of two";
306 if (BCH_SB_GC_RESERVE(sb) < 5)
307 return "gc reserve percentage too small";
309 if (!sb->time_precision ||
310 le32_to_cpu(sb->time_precision) > NSEC_PER_SEC)
311 return "invalid time precision";
313 /* validate layout */
314 err = validate_sb_layout(&sb->layout);
318 vstruct_for_each(sb, f) {
320 return "Invalid superblock: invalid optional field";
322 if (vstruct_next(f) > vstruct_last(sb))
323 return "Invalid superblock: invalid optional field";
326 /* members must be validated first: */
327 mi = bch2_sb_get_members(sb);
329 return "Invalid superblock: member info area missing";
331 err = bch2_sb_field_validate(sb, &mi->field);
335 vstruct_for_each(sb, f) {
336 if (le32_to_cpu(f->type) == BCH_SB_FIELD_members)
339 err = bch2_sb_field_validate(sb, f);
349 static void bch2_sb_update(struct bch_fs *c)
351 struct bch_sb *src = c->disk_sb.sb;
352 struct bch_sb_field_members *mi = bch2_sb_get_members(src);
356 lockdep_assert_held(&c->sb_lock);
358 c->sb.uuid = src->uuid;
359 c->sb.user_uuid = src->user_uuid;
360 c->sb.version = le16_to_cpu(src->version);
361 c->sb.nr_devices = src->nr_devices;
362 c->sb.clean = BCH_SB_CLEAN(src);
363 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src);
364 c->sb.encoded_extent_max= 1 << BCH_SB_ENCODED_EXTENT_MAX_BITS(src);
365 c->sb.time_base_lo = le64_to_cpu(src->time_base_lo);
366 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi);
367 c->sb.time_precision = le32_to_cpu(src->time_precision);
368 c->sb.features = le64_to_cpu(src->features[0]);
369 c->sb.compat = le64_to_cpu(src->compat[0]);
371 for_each_member_device(ca, c, i)
372 ca->mi = bch2_mi_to_cpu(mi->members + i);
375 /* doesn't copy member info */
376 static void __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src)
378 struct bch_sb_field *src_f, *dst_f;
379 struct bch_sb *dst = dst_handle->sb;
382 dst->version = src->version;
383 dst->version_min = src->version_min;
385 dst->uuid = src->uuid;
386 dst->user_uuid = src->user_uuid;
387 memcpy(dst->label, src->label, sizeof(dst->label));
389 dst->block_size = src->block_size;
390 dst->nr_devices = src->nr_devices;
392 dst->time_base_lo = src->time_base_lo;
393 dst->time_base_hi = src->time_base_hi;
394 dst->time_precision = src->time_precision;
396 memcpy(dst->flags, src->flags, sizeof(dst->flags));
397 memcpy(dst->features, src->features, sizeof(dst->features));
398 memcpy(dst->compat, src->compat, sizeof(dst->compat));
400 for (i = 0; i < BCH_SB_FIELD_NR; i++) {
401 if (i == BCH_SB_FIELD_journal)
404 src_f = bch2_sb_field_get(src, i);
405 dst_f = bch2_sb_field_get(dst, i);
406 dst_f = __bch2_sb_field_resize(dst_handle, dst_f,
407 src_f ? le32_to_cpu(src_f->u64s) : 0);
410 memcpy(dst_f, src_f, vstruct_bytes(src_f));
414 int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src)
416 struct bch_sb_field_journal *journal_buckets =
417 bch2_sb_get_journal(src);
418 unsigned journal_u64s = journal_buckets
419 ? le32_to_cpu(journal_buckets->field.u64s)
423 lockdep_assert_held(&c->sb_lock);
425 ret = bch2_sb_realloc(&c->disk_sb,
426 le32_to_cpu(src->u64s) - journal_u64s);
430 __copy_super(&c->disk_sb, src);
432 ret = bch2_sb_replicas_to_cpu_replicas(c);
436 ret = bch2_sb_disk_groups_to_cpu(c);
444 int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca)
446 struct bch_sb *src = c->disk_sb.sb, *dst = ca->disk_sb.sb;
447 struct bch_sb_field_journal *journal_buckets =
448 bch2_sb_get_journal(dst);
449 unsigned journal_u64s = journal_buckets
450 ? le32_to_cpu(journal_buckets->field.u64s)
452 unsigned u64s = le32_to_cpu(src->u64s) + journal_u64s;
455 ret = bch2_sb_realloc(&ca->disk_sb, u64s);
459 __copy_super(&ca->disk_sb, src);
463 /* read superblock: */
465 static const char *read_one_super(struct bch_sb_handle *sb, u64 offset)
467 struct bch_csum csum;
471 bio_set_dev(sb->bio, sb->bdev);
472 sb->bio->bi_iter.bi_sector = offset;
473 bio_set_op_attrs(sb->bio, REQ_OP_READ, REQ_SYNC|REQ_META);
474 bch2_bio_map(sb->bio, sb->sb, PAGE_SIZE << sb->page_order);
476 if (submit_bio_wait(sb->bio))
479 if (uuid_le_cmp(sb->sb->magic, BCACHE_MAGIC))
480 return "Not a bcachefs superblock";
482 if (le16_to_cpu(sb->sb->version) < bcachefs_metadata_version_min ||
483 le16_to_cpu(sb->sb->version) >= bcachefs_metadata_version_max)
484 return "Unsupported superblock version";
486 bytes = vstruct_bytes(sb->sb);
488 if (bytes > 512 << sb->sb->layout.sb_max_size_bits)
489 return "Bad superblock: too big";
491 if (get_order(bytes) > sb->page_order) {
492 if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s)))
493 return "cannot allocate memory";
497 if (BCH_SB_CSUM_TYPE(sb->sb) >= BCH_CSUM_NR)
498 return "unknown csum type";
500 /* XXX: verify MACs */
501 csum = csum_vstruct(NULL, BCH_SB_CSUM_TYPE(sb->sb),
502 null_nonce(), sb->sb);
504 if (bch2_crc_cmp(csum, sb->sb->csum))
505 return "bad checksum reading superblock";
507 sb->seq = le64_to_cpu(sb->sb->seq);
512 int bch2_read_super(const char *path, struct bch_opts *opts,
513 struct bch_sb_handle *sb)
515 u64 offset = opt_get(*opts, sb);
516 struct bch_sb_layout layout;
521 pr_verbose_init(*opts, "");
523 memset(sb, 0, sizeof(*sb));
524 sb->mode = FMODE_READ;
527 if (!opt_get(*opts, noexcl))
528 sb->mode |= FMODE_EXCL;
530 if (!opt_get(*opts, nochanges))
531 sb->mode |= FMODE_WRITE;
533 sb->bdev = blkdev_get_by_path(path, sb->mode, sb);
534 if (IS_ERR(sb->bdev) &&
535 PTR_ERR(sb->bdev) == -EACCES &&
536 opt_get(*opts, read_only)) {
537 sb->mode &= ~FMODE_WRITE;
539 sb->bdev = blkdev_get_by_path(path, sb->mode, sb);
540 if (!IS_ERR(sb->bdev))
541 opt_set(*opts, nochanges, true);
544 if (IS_ERR(sb->bdev)) {
545 ret = PTR_ERR(sb->bdev);
549 err = "cannot allocate memory";
550 ret = bch2_sb_realloc(sb, 0);
555 err = "dynamic fault";
556 if (bch2_fs_init_fault("read_super"))
560 err = read_one_super(sb, offset);
564 if (opt_defined(*opts, sb))
567 pr_err("error reading default superblock: %s", err);
570 * Error reading primary superblock - read location of backup
574 bio_set_dev(sb->bio, sb->bdev);
575 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR;
576 bio_set_op_attrs(sb->bio, REQ_OP_READ, REQ_SYNC|REQ_META);
578 * use sb buffer to read layout, since sb buffer is page aligned but
581 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout));
584 if (submit_bio_wait(sb->bio))
587 memcpy(&layout, sb->sb, sizeof(layout));
588 err = validate_sb_layout(&layout);
592 for (i = layout.sb_offset;
593 i < layout.sb_offset + layout.nr_superblocks; i++) {
594 offset = le64_to_cpu(*i);
596 if (offset == opt_get(*opts, sb))
599 err = read_one_super(sb, offset);
608 err = "Superblock block size smaller than device block size";
610 if (le16_to_cpu(sb->sb->block_size) << 9 <
611 bdev_logical_block_size(sb->bdev))
614 if (sb->mode & FMODE_WRITE)
615 bdev_get_queue(sb->bdev)->backing_dev_info->capabilities
616 |= BDI_CAP_STABLE_WRITES;
618 sb->have_layout = true;
620 pr_verbose_init(*opts, "ret %i", ret);
624 pr_err("error reading superblock: %s", err);
628 /* write superblock: */
630 static void write_super_endio(struct bio *bio)
632 struct bch_dev *ca = bio->bi_private;
634 /* XXX: return errors directly */
636 if (bch2_dev_io_err_on(bio->bi_status, ca, "superblock write"))
637 ca->sb_write_error = 1;
639 closure_put(&ca->fs->sb_write);
640 percpu_ref_put(&ca->io_ref);
643 static void read_back_super(struct bch_fs *c, struct bch_dev *ca)
645 struct bch_sb *sb = ca->disk_sb.sb;
646 struct bio *bio = ca->disk_sb.bio;
649 bio_set_dev(bio, ca->disk_sb.bdev);
650 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]);
651 bio->bi_end_io = write_super_endio;
652 bio->bi_private = ca;
653 bio_set_op_attrs(bio, REQ_OP_READ, REQ_SYNC|REQ_META);
654 bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE);
656 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_SB],
659 percpu_ref_get(&ca->io_ref);
660 closure_bio_submit(bio, &c->sb_write);
663 static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx)
665 struct bch_sb *sb = ca->disk_sb.sb;
666 struct bio *bio = ca->disk_sb.bio;
668 sb->offset = sb->layout.sb_offset[idx];
670 SET_BCH_SB_CSUM_TYPE(sb, c->opts.metadata_checksum);
671 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb),
675 bio_set_dev(bio, ca->disk_sb.bdev);
676 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset);
677 bio->bi_end_io = write_super_endio;
678 bio->bi_private = ca;
679 bio_set_op_attrs(bio, REQ_OP_WRITE, REQ_SYNC|REQ_META);
680 bch2_bio_map(bio, sb,
681 roundup((size_t) vstruct_bytes(sb),
682 bdev_logical_block_size(ca->disk_sb.bdev)));
684 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_SB],
687 percpu_ref_get(&ca->io_ref);
688 closure_bio_submit(bio, &c->sb_write);
691 int bch2_write_super(struct bch_fs *c)
693 struct closure *cl = &c->sb_write;
695 unsigned i, sb = 0, nr_wrote;
697 struct bch_devs_mask sb_written;
698 bool wrote, can_mount_without_written, can_mount_with_written;
701 lockdep_assert_held(&c->sb_lock);
703 closure_init_stack(cl);
704 memset(&sb_written, 0, sizeof(sb_written));
706 le64_add_cpu(&c->disk_sb.sb->seq, 1);
708 if (test_bit(BCH_FS_ERROR, &c->flags))
709 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1);
711 for_each_online_member(ca, c, i)
712 bch2_sb_from_fs(c, ca);
714 for_each_online_member(ca, c, i) {
715 err = bch2_sb_validate(&ca->disk_sb);
717 bch2_fs_inconsistent(c, "sb invalid before write: %s", err);
723 if (c->opts.nochanges)
726 for_each_online_member(ca, c, i) {
727 __set_bit(ca->dev_idx, sb_written.d);
728 ca->sb_write_error = 0;
731 for_each_online_member(ca, c, i)
732 read_back_super(c, ca);
735 for_each_online_member(ca, c, i) {
736 if (!ca->sb_write_error &&
738 le64_to_cpu(ca->sb_read_scratch->seq)) {
739 bch2_fs_fatal_error(c,
740 "Superblock modified by another process");
741 percpu_ref_put(&ca->io_ref);
749 for_each_online_member(ca, c, i)
750 if (!ca->sb_write_error &&
751 sb < ca->disk_sb.sb->layout.nr_superblocks) {
752 write_one_super(c, ca, sb);
759 for_each_online_member(ca, c, i) {
760 if (ca->sb_write_error)
761 __clear_bit(ca->dev_idx, sb_written.d);
763 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq);
766 nr_wrote = dev_mask_nr(&sb_written);
768 can_mount_with_written =
769 bch2_have_enough_devs(__bch2_replicas_status(c, sb_written),
770 BCH_FORCE_IF_DEGRADED);
772 for (i = 0; i < ARRAY_SIZE(sb_written.d); i++)
773 sb_written.d[i] = ~sb_written.d[i];
775 can_mount_without_written =
776 bch2_have_enough_devs(__bch2_replicas_status(c, sb_written),
777 BCH_FORCE_IF_DEGRADED);
780 * If we would be able to mount _without_ the devices we successfully
781 * wrote superblocks to, we weren't able to write to enough devices:
783 * Exception: if we can mount without the successes because we haven't
784 * written anything (new filesystem), we continue if we'd be able to
785 * mount with the devices we did successfully write to:
787 if (bch2_fs_fatal_err_on(!nr_wrote ||
788 (can_mount_without_written &&
789 !can_mount_with_written), c,
790 "Unable to write superblock to sufficient devices"))
793 /* Make new options visible after they're persistent: */
798 void __bch2_check_set_feature(struct bch_fs *c, unsigned feat)
800 mutex_lock(&c->sb_lock);
801 if (!(c->sb.features & (1ULL << feat))) {
802 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat);
806 mutex_unlock(&c->sb_lock);
809 /* BCH_SB_FIELD_journal: */
811 static int u64_cmp(const void *_l, const void *_r)
813 u64 l = *((const u64 *) _l), r = *((const u64 *) _r);
815 return l < r ? -1 : l > r ? 1 : 0;
818 static const char *bch2_sb_validate_journal(struct bch_sb *sb,
819 struct bch_sb_field *f)
821 struct bch_sb_field_journal *journal = field_to_type(f, journal);
822 struct bch_member *m = bch2_sb_get_members(sb)->members + sb->dev_idx;
828 journal = bch2_sb_get_journal(sb);
832 nr = bch2_nr_journal_buckets(journal);
836 b = kmalloc_array(sizeof(u64), nr, GFP_KERNEL);
838 return "cannot allocate memory";
840 for (i = 0; i < nr; i++)
841 b[i] = le64_to_cpu(journal->buckets[i]);
843 sort(b, nr, sizeof(u64), u64_cmp, NULL);
845 err = "journal bucket at sector 0";
849 err = "journal bucket before first bucket";
850 if (m && b[0] < le16_to_cpu(m->first_bucket))
853 err = "journal bucket past end of device";
854 if (m && b[nr - 1] >= le64_to_cpu(m->nbuckets))
857 err = "duplicate journal buckets";
858 for (i = 0; i + 1 < nr; i++)
859 if (b[i] == b[i + 1])
868 static const struct bch_sb_field_ops bch_sb_field_ops_journal = {
869 .validate = bch2_sb_validate_journal,
872 /* BCH_SB_FIELD_members: */
874 static const char *bch2_sb_validate_members(struct bch_sb *sb,
875 struct bch_sb_field *f)
877 struct bch_sb_field_members *mi = field_to_type(f, members);
878 struct bch_member *m;
880 if ((void *) (mi->members + sb->nr_devices) >
881 vstruct_end(&mi->field))
882 return "Invalid superblock: bad member info";
884 for (m = mi->members;
885 m < mi->members + sb->nr_devices;
887 if (!bch2_member_exists(m))
890 if (le64_to_cpu(m->nbuckets) > LONG_MAX)
891 return "Too many buckets";
893 if (le64_to_cpu(m->nbuckets) -
894 le16_to_cpu(m->first_bucket) < BCH_MIN_NR_NBUCKETS)
895 return "Not enough buckets";
897 if (le16_to_cpu(m->bucket_size) <
898 le16_to_cpu(sb->block_size))
899 return "bucket size smaller than block size";
901 if (le16_to_cpu(m->bucket_size) <
902 BCH_SB_BTREE_NODE_SIZE(sb))
903 return "bucket size smaller than btree node size";
909 static const struct bch_sb_field_ops bch_sb_field_ops_members = {
910 .validate = bch2_sb_validate_members,
913 /* BCH_SB_FIELD_crypt: */
915 static const char *bch2_sb_validate_crypt(struct bch_sb *sb,
916 struct bch_sb_field *f)
918 struct bch_sb_field_crypt *crypt = field_to_type(f, crypt);
920 if (vstruct_bytes(&crypt->field) != sizeof(*crypt))
921 return "invalid field crypt: wrong size";
923 if (BCH_CRYPT_KDF_TYPE(crypt))
924 return "invalid field crypt: bad kdf type";
929 static const struct bch_sb_field_ops bch_sb_field_ops_crypt = {
930 .validate = bch2_sb_validate_crypt,
933 /* BCH_SB_FIELD_clean: */
935 void bch2_sb_clean_renumber(struct bch_sb_field_clean *clean, int write)
937 struct jset_entry *entry;
939 for (entry = clean->start;
940 entry < (struct jset_entry *) vstruct_end(&clean->field);
941 entry = vstruct_next(entry))
942 bch2_bkey_renumber(BKEY_TYPE_BTREE, bkey_to_packed(entry->start), write);
945 int bch2_fs_mark_dirty(struct bch_fs *c)
950 * Unconditionally write superblock, to verify it hasn't changed before
954 mutex_lock(&c->sb_lock);
955 SET_BCH_SB_CLEAN(c->disk_sb.sb, false);
956 c->disk_sb.sb->compat[0] &= ~(1ULL << BCH_COMPAT_FEAT_ALLOC_METADATA);
957 ret = bch2_write_super(c);
958 mutex_unlock(&c->sb_lock);
964 entry_init_u64s(struct jset_entry *entry, unsigned u64s)
966 memset(entry, 0, u64s * sizeof(u64));
969 * The u64s field counts from the start of data, ignoring the shared
972 entry->u64s = u64s - 1;
976 entry_init_size(struct jset_entry *entry, size_t size)
978 unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
979 entry_init_u64s(entry, u64s);
983 bch2_journal_super_entries_add_common(struct bch_fs *c,
984 struct jset_entry *entry,
987 struct btree_root *r;
990 mutex_lock(&c->btree_root_lock);
992 for (r = c->btree_roots;
993 r < c->btree_roots + BTREE_ID_NR;
996 entry_init_u64s(entry, r->key.u64s + 1);
997 entry->btree_id = r - c->btree_roots;
998 entry->level = r->level;
999 entry->type = BCH_JSET_ENTRY_btree_root;
1000 bkey_copy(&entry->start[0], &r->key);
1002 entry = vstruct_next(entry);
1004 c->btree_roots_dirty = false;
1006 mutex_unlock(&c->btree_root_lock);
1008 percpu_down_write(&c->mark_lock);
1011 bch2_fs_usage_acc_to_base(c, 0);
1012 bch2_fs_usage_acc_to_base(c, 1);
1014 bch2_fs_usage_acc_to_base(c, journal_seq & 1);
1018 struct jset_entry_usage *u =
1019 container_of(entry, struct jset_entry_usage, entry);
1021 entry_init_size(entry, sizeof(*u));
1022 u->entry.type = BCH_JSET_ENTRY_usage;
1023 u->entry.btree_id = FS_USAGE_INODES;
1024 u->v = cpu_to_le64(c->usage_base->nr_inodes);
1026 entry = vstruct_next(entry);
1030 struct jset_entry_usage *u =
1031 container_of(entry, struct jset_entry_usage, entry);
1033 entry_init_size(entry, sizeof(*u));
1034 u->entry.type = BCH_JSET_ENTRY_usage;
1035 u->entry.btree_id = FS_USAGE_KEY_VERSION;
1036 u->v = cpu_to_le64(atomic64_read(&c->key_version));
1038 entry = vstruct_next(entry);
1041 for (i = 0; i < BCH_REPLICAS_MAX; i++) {
1042 struct jset_entry_usage *u =
1043 container_of(entry, struct jset_entry_usage, entry);
1045 entry_init_size(entry, sizeof(*u));
1046 u->entry.type = BCH_JSET_ENTRY_usage;
1047 u->entry.btree_id = FS_USAGE_RESERVED;
1049 u->v = cpu_to_le64(c->usage_base->persistent_reserved[i]);
1051 entry = vstruct_next(entry);
1054 for (i = 0; i < c->replicas.nr; i++) {
1055 struct bch_replicas_entry *e =
1056 cpu_replicas_entry(&c->replicas, i);
1057 struct jset_entry_data_usage *u =
1058 container_of(entry, struct jset_entry_data_usage, entry);
1060 entry_init_size(entry, sizeof(*u) + e->nr_devs);
1061 u->entry.type = BCH_JSET_ENTRY_data_usage;
1062 u->v = cpu_to_le64(c->usage_base->replicas[i]);
1063 memcpy(&u->r, e, replicas_entry_bytes(e));
1065 entry = vstruct_next(entry);
1068 percpu_up_write(&c->mark_lock);
1073 void bch2_fs_mark_clean(struct bch_fs *c)
1075 struct bch_sb_field_clean *sb_clean;
1076 struct jset_entry *entry;
1079 mutex_lock(&c->sb_lock);
1080 if (BCH_SB_CLEAN(c->disk_sb.sb))
1083 SET_BCH_SB_CLEAN(c->disk_sb.sb, true);
1085 c->disk_sb.sb->compat[0] |= 1ULL << BCH_COMPAT_FEAT_ALLOC_INFO;
1086 c->disk_sb.sb->compat[0] |= 1ULL << BCH_COMPAT_FEAT_ALLOC_METADATA;
1088 u64s = sizeof(*sb_clean) / sizeof(u64) + c->journal.entry_u64s_reserved;
1090 sb_clean = bch2_sb_resize_clean(&c->disk_sb, u64s);
1092 bch_err(c, "error resizing superblock while setting filesystem clean");
1096 sb_clean->flags = 0;
1097 sb_clean->read_clock = cpu_to_le16(c->bucket_clock[READ].hand);
1098 sb_clean->write_clock = cpu_to_le16(c->bucket_clock[WRITE].hand);
1099 sb_clean->journal_seq = cpu_to_le64(journal_cur_seq(&c->journal) - 1);
1101 /* Trying to catch outstanding bug: */
1102 BUG_ON(le64_to_cpu(sb_clean->journal_seq) > S64_MAX);
1104 entry = sb_clean->start;
1105 entry = bch2_journal_super_entries_add_common(c, entry, 0);
1106 BUG_ON((void *) entry > vstruct_end(&sb_clean->field));
1109 vstruct_end(&sb_clean->field) - (void *) entry);
1111 if (le16_to_cpu(c->disk_sb.sb->version) <
1112 bcachefs_metadata_version_bkey_renumber)
1113 bch2_sb_clean_renumber(sb_clean, WRITE);
1115 bch2_write_super(c);
1117 mutex_unlock(&c->sb_lock);
1120 static const char *bch2_sb_validate_clean(struct bch_sb *sb,
1121 struct bch_sb_field *f)
1123 struct bch_sb_field_clean *clean = field_to_type(f, clean);
1125 if (vstruct_bytes(&clean->field) < sizeof(*clean))
1126 return "invalid field crypt: wrong size";
1131 static const struct bch_sb_field_ops bch_sb_field_ops_clean = {
1132 .validate = bch2_sb_validate_clean,
1135 static const struct bch_sb_field_ops *bch2_sb_field_ops[] = {
1137 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f,
1142 static const char *bch2_sb_field_validate(struct bch_sb *sb,
1143 struct bch_sb_field *f)
1145 unsigned type = le32_to_cpu(f->type);
1147 return type < BCH_SB_FIELD_NR
1148 ? bch2_sb_field_ops[type]->validate(sb, f)
1152 void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb,
1153 struct bch_sb_field *f)
1155 unsigned type = le32_to_cpu(f->type);
1156 const struct bch_sb_field_ops *ops = type < BCH_SB_FIELD_NR
1157 ? bch2_sb_field_ops[type] : NULL;
1160 pr_buf(out, "%s", bch2_sb_fields[type]);
1162 pr_buf(out, "(unknown field %u)", type);
1164 pr_buf(out, " (size %llu):", vstruct_bytes(f));
1166 if (ops && ops->to_text)
1167 bch2_sb_field_ops[type]->to_text(out, sb, f);