ipv6: Move ipv6 stubs to a separate header file

The number of stubs is growing and has nothing to do with addrconf.
Move the definition of the stubs to a separate header file and update
users. In the move, drop the vxlan specific comment before ipv6_stub.

Code move only; no functional change intended.

Signed-off-by: David Ahern <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/infiniband/core/addr.c

···
 #include <net/neighbour.h>
 #include <net/route.h>
 #include <net/netevent.h>
-#include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #include <net/ip6_route.h>
 #include <rdma/ib_addr.h>
 #include <rdma/ib_sa.h>

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

···
 #include <net/tc_act/tc_pedit.h>
 #include <net/tc_act/tc_csum.h>
 #include <net/arp.h>
+#include <net/ipv6_stubs.h>
 #include "en.h"
 #include "en_rep.h"
 #include "en_tc.h"

drivers/net/geneve.c

···
 #include <linux/module.h>
 #include <linux/etherdevice.h>
 #include <linux/hash.h>
+#include <net/ipv6_stubs.h>
 #include <net/dst_metadata.h>
 #include <net/gro_cells.h>
 #include <net/rtnetlink.h>

drivers/net/usb/cdc_mbim.c

···
 #include <linux/usb/cdc_ncm.h>
 #include <net/ipv6.h>
 #include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 
 /* alternative VLAN for IP session 0 if not untagged */
 #define MBIM_IPS0_VID	4094

drivers/net/vxlan.c

···
 #include <linux/ethtool.h>
 #include <net/arp.h>
 #include <net/ndisc.h>
+#include <net/ipv6_stubs.h>
 #include <net/ip.h>
 #include <net/icmp.h>
 #include <net/rtnetlink.h>

include/net/addrconf.h

···
 
 void ipv6_mc_dad_complete(struct inet6_dev *idev);
 
-/* A stub used by vxlan module. This is ugly, ideally these
- * symbols should be built into the core kernel.
- */
-struct ipv6_stub {
-	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
-				 const struct in6_addr *addr);
-	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
-				 const struct in6_addr *addr);
-	int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
-			       struct dst_entry **dst, struct flowi6 *fl6);
-	int (*ipv6_route_input)(struct sk_buff *skb);
-
-	struct fib6_table *(*fib6_get_table)(struct net *net, u32 id);
-	struct fib6_info *(*fib6_lookup)(struct net *net, int oif,
-					 struct flowi6 *fl6, int flags);
-	struct fib6_info *(*fib6_table_lookup)(struct net *net,
-					      struct fib6_table *table,
-					      int oif, struct flowi6 *fl6,
-					      int flags);
-	struct fib6_info *(*fib6_multipath_select)(const struct net *net,
-						   struct fib6_info *f6i,
-						   struct flowi6 *fl6, int oif,
-						   const struct sk_buff *skb,
-						   int strict);
-	u32 (*ip6_mtu_from_fib6)(struct fib6_info *f6i, struct in6_addr *daddr,
-				 struct in6_addr *saddr);
-
-	void (*udpv6_encap_enable)(void);
-	void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
-			      const struct in6_addr *solicited_addr,
-			      bool router, bool solicited, bool override, bool inc_opt);
-	struct neigh_table *nd_tbl;
-};
-extern const struct ipv6_stub *ipv6_stub __read_mostly;
-
-/* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
-struct ipv6_bpf_stub {
-	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,
-			  bool force_bind_address_no_port, bool with_lock);
-	struct sock *(*udp6_lib_lookup)(struct net *net,
-					const struct in6_addr *saddr, __be16 sport,
-					const struct in6_addr *daddr, __be16 dport,
-					int dif, int sdif, struct udp_table *tbl,
-					struct sk_buff *skb);
-};
-extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
-
 /*
  * identify MLD packets for MLD filter exceptions
  */

include/net/ipv6_stubs.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _IPV6_STUBS_H
+#define _IPV6_STUBS_H
+
+#include <linux/in6.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/dst.h>
+#include <net/flow.h>
+#include <net/neighbour.h>
+#include <net/sock.h>
+
+/* structs from net/ip6_fib.h */
+struct fib6_info;
+
+/* This is ugly, ideally these symbols should be built
+ * into the core kernel.
+ */
+struct ipv6_stub {
+	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
+				 const struct in6_addr *addr);
+	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
+				 const struct in6_addr *addr);
+	int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
+			       struct dst_entry **dst, struct flowi6 *fl6);
+	int (*ipv6_route_input)(struct sk_buff *skb);
+
+	struct fib6_table *(*fib6_get_table)(struct net *net, u32 id);
+	struct fib6_info *(*fib6_lookup)(struct net *net, int oif,
+					 struct flowi6 *fl6, int flags);
+	struct fib6_info *(*fib6_table_lookup)(struct net *net,
+					      struct fib6_table *table,
+					      int oif, struct flowi6 *fl6,
+					      int flags);
+	struct fib6_info *(*fib6_multipath_select)(const struct net *net,
+						   struct fib6_info *f6i,
+						   struct flowi6 *fl6, int oif,
+						   const struct sk_buff *skb,
+						   int strict);
+	u32 (*ip6_mtu_from_fib6)(struct fib6_info *f6i, struct in6_addr *daddr,
+				 struct in6_addr *saddr);
+
+	void (*udpv6_encap_enable)(void);
+	void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
+			      const struct in6_addr *solicited_addr,
+			      bool router, bool solicited, bool override, bool inc_opt);
+	struct neigh_table *nd_tbl;
+};
+extern const struct ipv6_stub *ipv6_stub __read_mostly;
+
+/* A stub used by bpf helpers. Similarly ugly as ipv6_stub */
+struct ipv6_bpf_stub {
+	int (*inet6_bind)(struct sock *sk, struct sockaddr *uaddr, int addr_len,
+			  bool force_bind_address_no_port, bool with_lock);
+	struct sock *(*udp6_lib_lookup)(struct net *net,
+				     const struct in6_addr *saddr, __be16 sport,
+				     const struct in6_addr *daddr, __be16 dport,
+				     int dif, int sdif, struct udp_table *tbl,
+				     struct sk_buff *skb);
+};
+extern const struct ipv6_bpf_stub *ipv6_bpf_stub __read_mostly;
+
+#endif

include/net/udp_tunnel.h

···
 
 #if IS_ENABLED(CONFIG_IPV6)
 #include <net/ipv6.h>
-#include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #endif
 
 struct udp_port_cfg {

net/bridge/br_arp_nd_proxy.c

···
 #include <linux/if_vlan.h>
 #include <linux/inetdevice.h>
 #include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #if IS_ENABLED(CONFIG_IPV6)
 #include <net/ip6_checksum.h>
 #endif

net/core/filter.c

···
 #include <net/seg6.h>
 #include <net/seg6_local.h>
 #include <net/lwtunnel.h>
+#include <net/ipv6_stubs.h>
 
 /**
  *	sk_filter_trim_cap - run a packet through a socket filter

net/core/lwt_bpf.c

···
 #include <net/lwtunnel.h>
 #include <net/gre.h>
 #include <net/ip6_route.h>
+#include <net/ipv6_stubs.h>
 
 struct bpf_lwt_prog {
 	struct bpf_prog *prog;

net/ipv6/addrconf_core.c

···
 
 #include <linux/export.h>
 #include <net/ipv6.h>
-#include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #include <net/ip.h>
 
 /* if ipv6 module registers this function is used by xfrm to force all

net/ipv6/af_inet6.c

···
 #include <net/transp_v6.h>
 #include <net/ip6_route.h>
 #include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #include <net/ndisc.h>
 #ifdef CONFIG_IPV6_TUNNEL
 #include <net/ip6_tunnel.h>

net/mpls/af_mpls.c

···
 #if IS_ENABLED(CONFIG_IPV6)
 #include <net/ipv6.h>
 #endif
-#include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #include <net/nexthop.h>
 #include "internal.h"
 

net/tipc/udp_media.c

···
 #include <net/sock.h>
 #include <net/ip.h>
 #include <net/udp_tunnel.h>
-#include <net/addrconf.h>
+#include <net/ipv6_stubs.h>
 #include <linux/tipc_netlink.h>
 #include "core.h"
 #include "addr.h"