code blob

code6.c

static int inet_reuseport_add_sock(struct sock *new_sk)
{
    /* First check if another identical LISTEN socket, prev_sk,
     * exists. ... Then do the following:
     */
    if (prev_sk) {
        /*
         * Not the first listener - do the following:
         *	- Grow prev_sk->sk_reuseport_cb structure if required.
         *	- Save new_sk socket pointer in prev_sk's socks[].
         *	- prev_sk->sk_reuseport_cb->socks[num_socks] = new_sk;
         *	- prev_sk->sk_reuseport_cb->num_socks++;
         *	- Pointer assignment of the control block:
         *		new_sk->sk_reuseport_cb = prev_sk->sk_reuseport_cb;
         */
        return reuseport_add_sock(new_sk, prev_sk);
    }

    /*
     * First listener - do the following:
     *	- allocate new_sk->sk_reuseport_cb to contain 128 socks[]
     *	- new_sk->sk_reuseport_cb->max_socks = 128;
     *	- new_sk->sk_reuseport_cb->socks[0] = new_sk;
     *	- new_sk->sk_reuseport_cb->numsocks = 1;
     */
    return reuseport_alloc(new_sk);
}