1 files changed, 6 insertions, 1 deletions
diff --git a/bcache.h b/bcache.h
index 25e3047..bd87121 100644
--- a/bcache.h
+++ b/bcache.h
@@ -32,6 +32,7 @@ static const char bcache_magic[] = {
 #define SB_LABEL_SIZE		32
 #define SB_JOURNAL_BUCKETS	256U
 #define BDEV_DATA_START_DEFAULT	16	/* sectors */
+#define SB_START		(SB_SECTOR * 512)
 
 struct cache_sb {
 	uint64_t		csum;
@@ -84,7 +85,11 @@ struct cache_sb {
 	uint64_t		d[SB_JOURNAL_BUCKETS];	/* journal buckets */
 };
 
-BITMASK(SB_BDEV,	struct cache_sb, version, 0, 1);
+static inline bool SB_IS_BDEV(const struct cache_sb *sb)
+{
+	return sb->version == BCACHE_SB_VERSION_BDEV
+		|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
+}
 
 BITMASK(BDEV_WRITEBACK,	struct cache_sb, flags, 0, 1);