diff options
Diffstat (limited to 'drivers/md/bcache/super.c')
| -rw-r--r-- | drivers/md/bcache/super.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index e4f05c4ddcdd..62c9681fe92f 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -60,6 +60,17 @@ struct workqueue_struct *bch_journal_wq; /* Superblock */ +static unsigned int get_bucket_size(struct cache_sb *sb, struct cache_sb_disk *s) +{ + unsigned int bucket_size = le16_to_cpu(s->bucket_size); + + if (sb->version >= BCACHE_SB_VERSION_CDEV_WITH_FEATURES && + bch_has_feature_large_bucket(sb)) + bucket_size |= le16_to_cpu(s->bucket_size_hi) << 16; + + return bucket_size; +} + static const char *read_super_common(struct cache_sb *sb, struct block_device *bdev, struct cache_sb_disk *s) { @@ -68,7 +79,7 @@ static const char *read_super_common(struct cache_sb *sb, struct block_device * sb->first_bucket= le16_to_cpu(s->first_bucket); sb->nbuckets = le64_to_cpu(s->nbuckets); - sb->bucket_size = le16_to_cpu(s->bucket_size); + sb->bucket_size = get_bucket_size(sb, s); sb->nr_in_set = le16_to_cpu(s->nr_in_set); sb->nr_this_dev = le16_to_cpu(s->nr_this_dev); @@ -210,12 +221,16 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev, goto err; break; case BCACHE_SB_VERSION_CDEV_WITH_FEATURES: - err = read_super_common(sb, bdev, s); - if (err) - goto err; + /* + * Feature bits are needed in read_super_common(), + * convert them firstly. + */ sb->feature_compat = le64_to_cpu(s->feature_compat); sb->feature_incompat = le64_to_cpu(s->feature_incompat); sb->feature_ro_compat = le64_to_cpu(s->feature_ro_compat); + err = read_super_common(sb, bdev, s); + if (err) + goto err; break; default: err = "Unsupported superblock version"; |