static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
struct dst_entry *dst,
bool create)
{
struct tcp_metrics_block *tm;
struct inetpeer_addr saddr, daddr;
unsigned int hash;
struct net *net;
if (sk->sk_family == AF_INET) {
saddr.family = AF_INET;
saddr.addr.a4 = inet_sk(sk)->inet_saddr;
daddr.family = AF_INET;
daddr.addr.a4 = inet_sk(sk)->inet_daddr;
hash = (__force unsigned int) daddr.addr.a4;
}
#if IS_ENABLED(CONFIG_IPV6)
else if (sk->sk_family == AF_INET6) {
if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {
saddr.family = AF_INET;
saddr.addr.a4 = inet_sk(sk)->inet_saddr;
daddr.family = AF_INET;
daddr.addr.a4 = inet_sk(sk)->inet_daddr;
hash = (__force unsigned int) daddr.addr.a4;
} else {
saddr.family = AF_INET6;
*(struct in6_addr *)saddr.addr.a6 = sk->sk_v6_rcv_saddr;
daddr.family = AF_INET6;
*(struct in6_addr *)daddr.addr.a6 = sk->sk_v6_daddr;
hash = ipv6_addr_hash(&sk->sk_v6_daddr);
}
}
#endif
else
return NULL;
net = dev_net(dst->dev);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
tm = __tcp_get_metrics(&saddr, &daddr, net, hash);
if (tm == TCP_METRICS_RECLAIM_PTR)
tm = NULL;
if (!tm && create)
tm = tcpm_new(dst, &saddr, &daddr, hash);
else
tcpm_check_stamp(tm, dst);
return tm;
}
static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
struct dst_entry *dst,
bool create)
{
struct tcp_metrics_block *tm;
struct inetpeer_addr addr;
unsigned int hash;
struct net *net;
bool reclaim;
addr.family = sk->sk_family;
switch (addr.family) {
case AF_INET:
addr.addr.a4 = inet_sk(sk)->inet_daddr;
hash = (__force unsigned int) addr.addr.a4;
break;
case AF_INET6:
*(struct in6_addr *)addr.addr.a6 = inet6_sk(sk)->daddr;
hash = ipv6_addr_hash(&inet6_sk(sk)->daddr);
break;
default:
return NULL;
}
net = dev_net(dst->dev);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
tm = __tcp_get_metrics(&addr, net, hash);
reclaim = false;
if (tm == TCP_METRICS_RECLAIM_PTR) {
reclaim = true;
tm = NULL;
}
if (!tm && create)
tm = tcpm_new(dst, &addr, hash, reclaim);
else
tcpm_check_stamp(tm, dst);
return tm;
}
