+/* loopback helper functions */
+int file_create(char *path, int size);
+int loop_format(struct mkfs_opts *mop);
+int loop_setup(struct mkfs_opts *mop);
+int loop_cleanup(struct mkfs_opts *mop);
+
+/* generic target support */
+int osd_write_ldd(struct mkfs_opts *mop);
+int osd_read_ldd(char *dev, struct lustre_disk_data *ldd);
+int osd_is_lustre(char *dev, unsigned *mount_type);
+int osd_make_lustre(struct mkfs_opts *mop);
+int osd_prepare_lustre(struct mkfs_opts *mop,
+ char *default_mountopts, int default_len,
+ char *always_mountopts, int always_len);
+
+int ldiskfs_write_ldd(struct mkfs_opts *mop);
+int ldiskfs_read_ldd(char *dev, struct lustre_disk_data *ldd);
+int ldiskfs_is_lustre(char *dev, unsigned *mount_type);
+int ldiskfs_make_lustre(struct mkfs_opts *mop);
+int ldiskfs_prepare_lustre(struct mkfs_opts *mop,
+ char *default_mountopts, int default_len,
+ char *always_mountopts, int always_len);
+