file_getfd
int file_getfd(struct file *fp);
fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);
int fd = file_getfd(fp);