Merge branch 'ipv6-only-sock'

Kuniyuki Iwashima says:

====================
ipv6: Use ipv6_only_sock helper function.

The first patch removes __ipv6_only_sock(), and the second replaces
ipv6only tests with ipv6_only_sock().
====================
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;

include/linux/ipv6.h

@@ -340,8 +340,7 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 	return (struct raw6_sock *)sk;
 }
 
-#define __ipv6_only_sock(sk)	(sk->sk_ipv6only)
-#define ipv6_only_sock(sk)	(__ipv6_only_sock(sk))
+#define ipv6_only_sock(sk)	(sk->sk_ipv6only)
 #define ipv6_sk_rxinfo(sk)	((sk)->sk_family == PF_INET6 && \
 				 inet6_sk(sk)->rxopt.bits.rxinfo)
 
@@ -358,7 +357,6 @@ static inline int inet_v6_ipv6only(const struct sock *sk)
 	return ipv6_only_sock(sk);
 }
 #else
-#define __ipv6_only_sock(sk)	0
 #define ipv6_only_sock(sk)	0
 #define ipv6_sk_rxinfo(sk)	0
 

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/dccp/ipv6.c

@@ -892,7 +892,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 
 		SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
 
-		if (__ipv6_only_sock(sk))
+		if (ipv6_only_sock(sk))
 			return -ENETUNREACH;
 
 		sin.sin_family = AF_INET;

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;
 		}

net/ipv6/datagram.c

@@ -145,7 +145,7 @@ int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr,
 	int			err;
 
 	if (usin->sin6_family == AF_INET) {
-		if (__ipv6_only_sock(sk))
+		if (ipv6_only_sock(sk))
 			return -EAFNOSUPPORT;
 		err = __ip4_datagram_connect(sk, uaddr, addr_len);
 		goto ipv4_connected;
@@ -178,7 +178,7 @@ int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr,
 	if (addr_type & IPV6_ADDR_MAPPED) {
 		struct sockaddr_in sin;
 
-		if (__ipv6_only_sock(sk)) {
+		if (ipv6_only_sock(sk)) {
 			err = -ENETUNREACH;
 			goto out;
 		}

net/ipv6/tcp_ipv6.c

@@ -230,7 +230,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 		u32 exthdrlen = icsk->icsk_ext_hdr_len;
 		struct sockaddr_in sin;
 
-		if (__ipv6_only_sock(sk))
+		if (ipv6_only_sock(sk))
 			return -ENETUNREACH;
 
 		sin.sin_family = AF_INET;

net/ipv6/udp.c

@@ -1123,7 +1123,7 @@ static int udpv6_pre_connect(struct sock *sk, struct sockaddr *uaddr,
 	 * bytes that are out of the bound specified by user in addr_len.
 	 */
 	if (uaddr->sa_family == AF_INET) {
-		if (__ipv6_only_sock(sk))
+		if (ipv6_only_sock(sk))
 			return -EAFNOSUPPORT;
 		return udp_pre_connect(sk, uaddr, addr_len);
 	}
@@ -1359,7 +1359,7 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 			msg->msg_name = &sin;
 			msg->msg_namelen = sizeof(sin);
 do_udp_sendmsg:
-			if (__ipv6_only_sock(sk))
+			if (ipv6_only_sock(sk))
 				return -ENETUNREACH;
 			return udp_sendmsg(sk, msg, len);
 		}

net/sctp/ipv6.c

@@ -926,7 +926,7 @@ static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp)
 		return 1;
 	/* v4-mapped-v6 addresses */
 	case AF_INET:
-		if (!__ipv6_only_sock(sctp_opt2sk(sp)))
+		if (!ipv6_only_sock(sctp_opt2sk(sp)))
 			return 1;
 		fallthrough;
 	default:
@@ -952,7 +952,7 @@ static int sctp_inet6_cmp_addr(const union sctp_addr *addr1,
 		return 0;
 
 	/* If the socket is IPv6 only, v4 addrs will not match */
-	if (__ipv6_only_sock(sk) && af1 != af2)
+	if (ipv6_only_sock(sk) && af1 != af2)
 		return 0;
 
 	/* Today, wildcard AF_INET/AF_INET6. */