ipv6: Use ipv6_only_sock() helper in condition.

This patch replaces some sk_ipv6only tests with ipv6_only_sock().
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -5226,7 +5226,7 @@ static void bond_sk_to_flow(struct sock *sk, struct flow_keys *flow)
 	switch (sk->sk_family) {
 #if IS_ENABLED(CONFIG_IPV6)
 	case AF_INET6:
-		if (sk->sk_ipv6only ||
+		if (ipv6_only_sock(sk) ||
 		    ipv6_addr_type(&sk->sk_v6_daddr) != IPV6_ADDR_MAPPED) {
 			flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 			flow->addrs.v6addrs.src = inet6_sk(sk)->saddr;

drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c

@@ -483,7 +483,7 @@ static int chcr_ktls_dev_add(struct net_device *netdev, struct sock *sk,
 		tx_info->ip_family = AF_INET;
 #if IS_ENABLED(CONFIG_IPV6)
 	} else {
-		if (!sk->sk_ipv6only &&
+		if (!ipv6_only_sock(sk) &&
 		    ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) {
 			memcpy(daaddr, &sk->sk_daddr, 4);
 			tx_info->ip_family = AF_INET;

drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c

@@ -102,7 +102,7 @@ struct mlx5_flow_handle *mlx5e_accel_fs_add_sk(struct mlx5e_priv *priv,
 		break;
 #if IS_ENABLED(CONFIG_IPV6)
 	case AF_INET6:
-		if (!sk->sk_ipv6only &&
+		if (!ipv6_only_sock(sk) &&
 		    ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) {
 			accel_fs_tcp_set_ipv4_flow(spec, sk);
 			ft = &fs_tcp->tables[ACCEL_FS_IPV4_TCP];

drivers/net/ethernet/netronome/nfp/crypto/tls.c

@@ -289,7 +289,7 @@ nfp_net_tls_add(struct net_device *netdev, struct sock *sk,
 	switch (sk->sk_family) {
 #if IS_ENABLED(CONFIG_IPV6)
 	case AF_INET6:
-		if (sk->sk_ipv6only ||
+		if (ipv6_only_sock(sk) ||
 		    ipv6_addr_type(&sk->sk_v6_daddr) != IPV6_ADDR_MAPPED) {
 			req_sz = sizeof(struct nfp_crypto_req_add_v6);
 			ipv6 = true;

net/core/filter.c

@@ -7099,7 +7099,7 @@ BPF_CALL_5(bpf_tcp_gen_syncookie, struct sock *, sk, void *, iph, u32, iph_len,
 	 */
 	switch (((struct iphdr *)iph)->version) {
 	case 4:
-		if (sk->sk_family == AF_INET6 && sk->sk_ipv6only)
+		if (sk->sk_family == AF_INET6 && ipv6_only_sock(sk))
 			return -EINVAL;
 
 		mss = tcp_v4_get_syncookie(sk, iph, th, &cookie);

net/ipv6/af_inet6.c

@@ -318,7 +318,7 @@ static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
 		/* Binding to v4-mapped address on a v6-only socket
 		 * makes no sense
 		 */
-		if (sk->sk_ipv6only) {
+		if (ipv6_only_sock(sk)) {
 			err = -EINVAL;
 			goto out;
 		}