1 files changed, 103 insertions, 0 deletions
diff --git a/c_src/libbcachefs/super-io.h b/c_src/libbcachefs/super-io.h
new file mode 100644
index 00000000..95e80e06
--- /dev/null
+++ b/c_src/libbcachefs/super-io.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_SUPER_IO_H
+#define _BCACHEFS_SUPER_IO_H
+
+#include "extents.h"
+#include "eytzinger.h"
+#include "super_types.h"
+#include "super.h"
+#include "sb-members.h"
+
+#include <asm/byteorder.h>
+
+static inline bool bch2_version_compatible(u16 version)
+{
+	return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
+		version >= bcachefs_metadata_version_min;
+}
+
+void bch2_version_to_text(struct printbuf *, unsigned);
+unsigned bch2_latest_compatible_version(unsigned);
+
+static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f)
+{
+	return le32_to_cpu(f->u64s) * sizeof(u64);
+}
+
+#define field_to_type(_f, _name)					\
+	container_of_or_null(_f, struct bch_sb_field_##_name, field)
+
+struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);
+#define bch2_sb_field_get(_sb, _name)					\
+	field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)
+
+struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,
+					     enum bch_sb_field_type, unsigned);
+#define bch2_sb_field_resize(_sb, _name, _u64s)				\
+	field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
+
+struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *,
+					enum bch_sb_field_type, unsigned);
+#define bch2_sb_field_get_minsize(_sb, _name, _u64s)				\
+	field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
+
+#define bch2_sb_field_nr_entries(_f)					\
+	(_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) /	\
+	       sizeof(_f->entries[0]))					\
+	    : 0)
+
+void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
+
+extern const char * const bch2_sb_fields[];
+
+struct bch_sb_field_ops {
+	int	(*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
+	void	(*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
+};
+
+static inline __le64 bch2_sb_magic(struct bch_fs *c)
+{
+	__le64 ret;
+
+	memcpy(&ret, &c->sb.uuid, sizeof(ret));
+	return ret;
+}
+
+static inline __u64 jset_magic(struct bch_fs *c)
+{
+	return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
+}
+
+static inline __u64 bset_magic(struct bch_fs *c)
+{
+	return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
+}
+
+int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
+int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
+
+void bch2_free_super(struct bch_sb_handle *);
+int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
+
+int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
+int bch2_read_super_silent(const char *, struct bch_opts *, struct bch_sb_handle *);
+int bch2_write_super(struct bch_fs *);
+void __bch2_check_set_feature(struct bch_fs *, unsigned);
+
+static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
+{
+	if (!(c->sb.features & (1ULL << feat)))
+		__bch2_check_set_feature(c, feat);
+}
+
+bool bch2_check_version_downgrade(struct bch_fs *);
+void bch2_sb_upgrade(struct bch_fs *, unsigned);
+
+void __bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
+			     struct bch_sb_field *);
+void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
+			   struct bch_sb_field *);
+void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
+void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
+
+#endif /* _BCACHEFS_SUPER_IO_H */