ipmr: Make vif fib notifiers common

The fib-notifiers are tightly coupled with the vif_device which is
already common. Move the notifier struct definition and helpers to the
common file; Currently they're only used by ipmr.

Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/mroute.h

@@ -55,14 +55,6 @@ static inline bool ipmr_rule_default(const struct fib_rule *rule)
 }
 #endif
 
-struct vif_entry_notifier_info {
-	struct fib_notifier_info info;
-	struct net_device *dev;
-	vifi_t vif_index;
-	unsigned short vif_flags;
-	u32 tb_id;
-};
-
 #define VIFF_STATIC 0x8000
 
 struct mfc_cache_cmp_arg {

include/linux/mroute_base.h

@@ -6,6 +6,7 @@
 #include <linux/spinlock.h>
 #include <net/net_namespace.h>
 #include <net/sock.h>
+#include <net/fib_notifier.h>
 
 /**
  * struct vif_device - interface representor for multicast routing
@@ -36,6 +37,58 @@ struct vif_device {
 	__be32 local, remote;
 };
 
+struct vif_entry_notifier_info {
+	struct fib_notifier_info info;
+	struct net_device *dev;
+	unsigned short vif_index;
+	unsigned short vif_flags;
+	u32 tb_id;
+};
+
+static inline int mr_call_vif_notifier(struct notifier_block *nb,
+				       struct net *net,
+				       unsigned short family,
+				       enum fib_event_type event_type,
+				       struct vif_device *vif,
+				       unsigned short vif_index, u32 tb_id)
+{
+	struct vif_entry_notifier_info info = {
+		.info = {
+			.family = family,
+			.net = net,
+		},
+		.dev = vif->dev,
+		.vif_index = vif_index,
+		.vif_flags = vif->flags,
+		.tb_id = tb_id,
+	};
+
+	return call_fib_notifier(nb, net, event_type, &info.info);
+}
+
+static inline int mr_call_vif_notifiers(struct net *net,
+					unsigned short family,
+					enum fib_event_type event_type,
+					struct vif_device *vif,
+					unsigned short vif_index, u32 tb_id,
+					unsigned int *ipmr_seq)
+{
+	struct vif_entry_notifier_info info = {
+		.info = {
+			.family = family,
+			.net = net,
+		},
+		.dev = vif->dev,
+		.vif_index = vif_index,
+		.vif_flags = vif->flags,
+		.tb_id = tb_id,
+	};
+
+	ASSERT_RTNL();
+	(*ipmr_seq)++;
+	return call_fib_notifiers(net, event_type, &info.info);
+}
+
 #ifndef MAXVIFS
 /* This one is nasty; value is defined in uapi using different symbols for
  * mroute and morute6 but both map into same 32.

net/ipv4/ipmr.c

@@ -650,18 +650,8 @@ static int call_ipmr_vif_entry_notifier(struct notifier_block *nb,
 					struct vif_device *vif,
 					vifi_t vif_index, u32 tb_id)
 {
-	struct vif_entry_notifier_info info = {
+	return mr_call_vif_notifier(nb, net, RTNL_FAMILY_IPMR, event_type,
-		.info = {
+				    vif, vif_index, tb_id);
-			.family = RTNL_FAMILY_IPMR,
-			.net = net,
-		},
-		.dev = vif->dev,
-		.vif_index = vif_index,
-		.vif_flags = vif->flags,
-		.tb_id = tb_id,
-	};
-
-	return call_fib_notifier(nb, net, event_type, &info.info);
 }
 
 static int call_ipmr_vif_entry_notifiers(struct net *net,
@@ -669,20 +659,9 @@ static int call_ipmr_vif_entry_notifiers(struct net *net,
 					 struct vif_device *vif,
 					 vifi_t vif_index, u32 tb_id)
 {
-	struct vif_entry_notifier_info info = {
+	return mr_call_vif_notifiers(net, RTNL_FAMILY_IPMR, event_type,
-		.info = {
+				     vif, vif_index, tb_id,
-			.family = RTNL_FAMILY_IPMR,
+				     &net->ipv4.ipmr_seq);
-			.net = net,
-		},
-		.dev = vif->dev,
-		.vif_index = vif_index,
-		.vif_flags = vif->flags,
-		.tb_id = tb_id,
-	};
-
-	ASSERT_RTNL();
-	net->ipv4.ipmr_seq++;
-	return call_fib_notifiers(net, event_type, &info.info);
 }
 
 static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb,