tcp: simplify inetpeer_addr_base use

In many places, the a6 field is typecasted to struct in6_addr. As the
fields are in union anyway, just add in6_addr type to the union and get rid
of the typecasting.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 10 insertions, 15 deletions

diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h
index 80479abddf73..d5332ddcea3f 100644
--- a/include/net/inetpeer.h
+++ b/include/net/inetpeer.h
@@ -19,6 +19,7 @@ struct inetpeer_addr_base {
         union {
                 __be32                  a4;
                 __be32                  a6[4];
+                struct in6_addr         in6;
         };
 };
 
@@ -151,7 +152,7 @@ static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base,
 {
         struct inetpeer_addr daddr;
 
-        *(struct in6_addr *)daddr.addr.a6 = *v6daddr;
+        daddr.addr.in6 = *v6daddr;
         daddr.family = AF_INET6;
         return inet_getpeer(base, &daddr, create);
 }
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 5bef3513af77..f62c2c68ced0 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -80,17 +80,11 @@ static void tcp_metric_set(struct tcp_metrics_block *tm,
 static bool addr_same(const struct inetpeer_addr *a,
                       const struct inetpeer_addr *b)
 {
-        const struct in6_addr *a6, *b6;
-
         if (a->family != b->family)
                 return false;
         if (a->family == AF_INET)
                 return a->addr.a4 == b->addr.a4;
-
-        a6 = (const struct in6_addr *) &a->addr.a6[0];
-        b6 = (const struct in6_addr *) &b->addr.a6[0];
-
-        return ipv6_addr_equal(a6, b6);
+        return ipv6_addr_equal(&a->addr.in6, &b->addr.in6);
 }
 
 struct tcpm_hash_bucket {
@@ -256,8 +250,8 @@ static struct tcp_metrics_block *__tcp_get_metrics_req(struct request_sock *req,
                 break;
 #if IS_ENABLED(CONFIG_IPV6)
         case AF_INET6:
-                *(struct in6_addr *)saddr.addr.a6 = inet_rsk(req)->ir_v6_loc_addr;
-                *(struct in6_addr *)daddr.addr.a6 = inet_rsk(req)->ir_v6_rmt_addr;
+                saddr.addr.in6 = inet_rsk(req)->ir_v6_loc_addr;
+                daddr.addr.in6 = inet_rsk(req)->ir_v6_rmt_addr;
                 hash = ipv6_addr_hash(&inet_rsk(req)->ir_v6_rmt_addr);
                 break;
 #endif
@@ -304,9 +298,9 @@ static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock
                         hash = (__force unsigned int) daddr.addr.a4;
                 } else {
                         saddr.family = AF_INET6;
-                        *(struct in6_addr *)saddr.addr.a6 = tw->tw_v6_rcv_saddr;
+                        saddr.addr.in6 = tw->tw_v6_rcv_saddr;
                         daddr.family = AF_INET6;
-                        *(struct in6_addr *)daddr.addr.a6 = tw->tw_v6_daddr;
+                        daddr.addr.in6 = tw->tw_v6_daddr;
                         hash = ipv6_addr_hash(&tw->tw_v6_daddr);
                 }
         }
@@ -354,9 +348,9 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
                         hash = (__force unsigned int) daddr.addr.a4;
                 } else {
                         saddr.family = AF_INET6;
-                        *(struct in6_addr *)saddr.addr.a6 = sk->sk_v6_rcv_saddr;
+                        saddr.addr.in6 = sk->sk_v6_rcv_saddr;
                         daddr.family = AF_INET6;
-                        *(struct in6_addr *)daddr.addr.a6 = sk->sk_v6_daddr;
+                        daddr.addr.in6 = sk->sk_v6_daddr;
                         hash = ipv6_addr_hash(&sk->sk_v6_daddr);
                 }
         }
@@ -966,7 +960,7 @@ static int __parse_nl_addr(struct genl_info *info, struct inetpeer_addr *addr,
                 addr->family = AF_INET6;
                 memcpy(addr->addr.a6, nla_data(a), sizeof(addr->addr.a6));
                 if (hash)
-                        *hash = ipv6_addr_hash((struct in6_addr *) addr->addr.a6);
+                        *hash = ipv6_addr_hash(&addr->addr.in6);
                 return 0;
         }
         return optional ? 1 : -EAFNOSUPPORT;