int is_lustre_target(struct mkfs_opts *mop);
/* loopback helper functions */
-int file_create(char *path, int size);
+int file_create(char *path, __u64 size);
int loop_format(struct mkfs_opts *mop);
int loop_setup(struct mkfs_opts *mop);
int loop_cleanup(struct mkfs_opts *mop);