--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_SB_DOWNGRADE_H
+#define _BCACHEFS_SB_DOWNGRADE_H
+
+extern const struct bch_sb_field_ops bch_sb_field_ops_downgrade;
+
+int bch2_sb_downgrade_update(struct bch_fs *);
+void bch2_sb_set_upgrade(struct bch_fs *, unsigned, unsigned);
+void bch2_sb_set_downgrade(struct bch_fs *, unsigned, unsigned);
+
+#endif /* _BCACHEFS_SB_DOWNGRADE_H */