static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock *tw)
{
struct inet6_timewait_sock *tw6;
struct tcp_metrics_block *tm;
struct inetpeer_addr addr;
unsigned int hash;
struct net *net;
addr.family = tw->tw_family;
switch (addr.family) {
case AF_INET:
addr.addr.a4 = tw->tw_daddr;
hash = (__force unsigned int) addr.addr.a4;
break;
case AF_INET6:
tw6 = inet6_twsk((struct sock *)tw);
*(struct in6_addr *)addr.addr.a6 = tw6->tw_v6_daddr;
hash = ipv6_addr_hash(&tw6->tw_v6_daddr);
break;
default:
return NULL;
}
net = twsk_net(tw);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
tm = rcu_dereference(tm->tcpm_next)) {
if (addr_same(&tm->tcpm_addr, &addr))
break;
}
return tm;
}
static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock *tw)
{
struct tcp_metrics_block *tm;
struct inetpeer_addr saddr, daddr;
unsigned int hash;
struct net *net;
if (tw->tw_family == AF_INET) {
saddr.family = AF_INET;
saddr.addr.a4 = tw->tw_rcv_saddr;
daddr.family = AF_INET;
daddr.addr.a4 = tw->tw_daddr;
hash = (__force unsigned int) daddr.addr.a4;
}
#if IS_ENABLED(CONFIG_IPV6)
else if (tw->tw_family == AF_INET6) {
if (ipv6_addr_v4mapped(&tw->tw_v6_daddr)) {
saddr.family = AF_INET;
saddr.addr.a4 = tw->tw_rcv_saddr;
daddr.family = AF_INET;
daddr.addr.a4 = tw->tw_daddr;
hash = (__force unsigned int) daddr.addr.a4;
} else {
saddr.family = AF_INET6;
*(struct in6_addr *)saddr.addr.a6 = tw->tw_v6_rcv_saddr;
daddr.family = AF_INET6;
*(struct in6_addr *)daddr.addr.a6 = tw->tw_v6_daddr;
hash = ipv6_addr_hash(&tw->tw_v6_daddr);
}
}
#endif
else
return NULL;
net = twsk_net(tw);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
tm = rcu_dereference(tm->tcpm_next)) {
if (addr_same(&tm->tcpm_saddr, &saddr) &&
addr_same(&tm->tcpm_daddr, &daddr))
break;
}
return tm;
}
