extern int write_file(int fd, unsigned long long *offset, const char *buf,
int len);
extern int lseek_file(int fd, long long offset, int whence);
+extern int fsync_file(int fd, int datasync);
extern int file_create(char *name, int ur, int uw, int ux, int gr,
int gw, int gx, int or, int ow, int ox);
extern int set_attr(const char *file, struct hostfs_iattr *attrs);