Commit 00246644 authored by Kent Overstreet's avatar Kent Overstreet
Browse files

bcachefs: fix bch2_dev_buckets_resize() 



The resize memcpy path was totally busted.

Signed-off-by: default avatarKent Overstreet <kent.overstreet@linux.dev>
parent 9e9c28ac

fs/bcachefs/buckets.c

+3 −5
Original line number Diff line number Diff line
@@ -1307,13 +1307,11 @@ int bch2_dev_buckets_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets) 
	old_bucket_gens = rcu_dereference_protected(ca->bucket_gens, 1);



	if (resize) {

		bucket_gens->nbuckets = min(bucket_gens->nbuckets,

		u64 copy = min(bucket_gens->nbuckets,

			       old_bucket_gens->nbuckets);

		bucket_gens->nbuckets_minus_first =

			bucket_gens->nbuckets - bucket_gens->first_bucket;

		memcpy(bucket_gens->b,

		       old_bucket_gens->b,

		       bucket_gens->nbuckets);

		       sizeof(bucket_gens->b[0]) * copy);

	}



	rcu_assign_pointer(ca->bucket_gens, bucket_gens);