SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)

SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,

unsigned, flags, struct sockaddr __user *, addr,

int, addr_len)

SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t size,
        unsigned, flags, struct sockaddr __user *, addr,
        int __user *, addr_len)

static const struct file_operations socket_file_ops = {
    .owner =    THIS_MODULE,
    .llseek =    no_llseek,
    .aio_read =    sock_aio_read,
    .aio_write =    sock_aio_write,
    .poll =        sock_poll,
    .unlocked_ioctl = sock_ioctl,
#ifdef CONFIG_COMPAT
    .compat_ioctl = compat_sock_ioctl,
#endif
    .mmap =        sock_mmap,
    .open =        sock_no_open,    /* special open code to disallow open via /proc */
    .release =    sock_close,
    .fasync =    sock_fasync,
    .sendpage =    sock_sendpage,
    .splice_write = generic_splice_sendpage,
    .splice_read =    sock_splice_read,
};

static int sock_close(struct inode *inode, struct file *filp)