/*
* IPVS main scheduling function
* It selects a server according to the virtual service, and
* creates a connection entry.
*/
static struct ip_vs_conn *
ip_vs_schedule(struct ip_vs_service *svc, struct iphdr *iph)
{
struct ip_vs_conn *cp = NULL;
struct ip_vs_dest *dest;
const __u16 *portp;
/*
* Persistent service
*/
if (svc->flags & IP_VS_SVC_F_PERSISTENT)
return ip_vs_sched_persist(svc, iph);
/*
* Non-persistent service
*/
portp = (__u16 *)&(((char *)iph)[iph->ihl*4]);
if (!svc->fwmark && portp[1] != svc->port) {
if (!svc->port)
IP_VS_ERR("Schedule: port zero only supported "
"in persistent services, "
"check your ipvs configuration\n");
return NULL;
}
dest = svc->scheduler->schedule(svc, iph);
if (dest == NULL) {
IP_VS_DBG(1, "Schedule: no dest found.\n");
return NULL;
}
/*
* Create a connection entry.
*/
cp = ip_vs_conn_new(iph->protocol,
iph->saddr, portp[0],
iph->daddr, portp[1],
dest->addr, dest->port?dest->port:portp[1],
0,
dest);
if (cp == NULL)
return NULL;
/*
* Increase the inactive connection counter because it is in
* Syn-Received state (inactive) when the connection is created.
*/
atomic_inc(&dest->inactconns);
IP_VS_DBG(6, "Schedule fwd:%c s:%s c:%u.%u.%u.%u:%u v:%u.%u.%u.%u:%u "
"d:%u.%u.%u.%u:%u flg:%X cnt:%d\n",
ip_vs_fwd_tag(cp), ip_vs_state_name(cp->state),
NIPQUAD(cp->caddr), ntohs(cp->cport),
NIPQUAD(cp->vaddr), ntohs(cp->vport),
NIPQUAD(cp->daddr), ntohs(cp->dport),
cp->flags, atomic_read(&cp->refcnt));
return cp;
}
#ifdef CONFIG_IP_VS_IPV6 if (cp->af == AF_INET6) seq_printf(seq, "%-3s %pI6 %04X %pI6 %04X %pI6 %04X %-11s %-6s %7lu\n", ip_vs_proto_name(cp->protocol), &cp->caddr.in6, ntohs(cp->cport), &cp->vaddr.in6, ntohs(cp->vport), &cp->daddr.in6, ntohs(cp->dport), ip_vs_state_name(cp->protocol, cp->state), ip_vs_origin_name(cp->flags), (cp->timer.expires-jiffies)/HZ); else #endif seq_printf(seq, "%-3s %08X %04X %08X %04X " "%08X %04X %-11s %-6s %7lu\n", ip_vs_proto_name(cp->protocol), ntohl(cp->caddr.ip), ntohs(cp->cport), ntohl(cp->vaddr.ip), ntohs(cp->vport), ntohl(cp->daddr.ip), ntohs(cp->dport), ip_vs_state_name(cp->protocol, cp->state), ip_vs_origin_name(cp->flags), (cp->timer.expires-jiffies)/HZ);
