ipmr: Make ipmr_dump() common

Since all the primitive elements used for the notification done by ipmr
are now common [mr_table, mr_mfc, vif_device] we can refactor the logic
for dumping them to a common file.

Signed-off-by: Yuval Mintz <[email protected]>
Signed-off-by: Ido Schimmel <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Yuval Mintz

include/linux/mroute_base.h

@@ -277,6 +277,13 @@ int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb,
 				 u32 portid, u32 seq, struct mr_mfc *c,
 				 int cmd, int flags),
 		     spinlock_t *lock);
+
+int mr_dump(struct net *net, struct notifier_block *nb, unsigned short family,
+	    int (*rules_dump)(struct net *net,
+			      struct notifier_block *nb),
+	    struct mr_table *(*mr_iter)(struct net *net,
+					struct mr_table *mrt),
+	    rwlock_t *mrt_lock);
 #else
 static inline void vif_device_init(struct vif_device *v,
 				   struct net_device *dev,
@@ -333,6 +340,17 @@ mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb,
 {
 	return -EINVAL;
 }
+
+static inline int mr_dump(struct net *net, struct notifier_block *nb,
+			  unsigned short family,
+			  int (*rules_dump)(struct net *net,
+					    struct notifier_block *nb),
+			  struct mr_table *(*mr_iter)(struct net *net,
+						      struct mr_table *mrt),
+			  rwlock_t *mrt_lock)
+{
+	return -EINVAL;
+}
 #endif
 
 static inline void *mr_mfc_find(struct mr_table *mrt, void *hasharg)

net/ipv4/ipmr.c

@@ -644,16 +644,6 @@ static struct net_device *ipmr_reg_vif(struct net *net, struct mr_table *mrt)
 }
 #endif
 
-static int call_ipmr_vif_entry_notifier(struct notifier_block *nb,
-					struct net *net,
-					enum fib_event_type event_type,
-					struct vif_device *vif,
-					vifi_t vif_index, u32 tb_id)
-{
-	return mr_call_vif_notifier(nb, net, RTNL_FAMILY_IPMR, event_type,
-				    vif, vif_index, tb_id);
-}
-
 static int call_ipmr_vif_entry_notifiers(struct net *net,
 					 enum fib_event_type event_type,
 					 struct vif_device *vif,
@@ -664,15 +654,6 @@ static int call_ipmr_vif_entry_notifiers(struct net *net,
 				     &net->ipv4.ipmr_seq);
 }
 
-static int call_ipmr_mfc_entry_notifier(struct notifier_block *nb,
-					struct net *net,
-					enum fib_event_type event_type,
-					struct mfc_cache *mfc, u32 tb_id)
-{
-	return mr_call_mfc_notifier(nb, net, RTNL_FAMILY_IPMR,
-				    event_type, &mfc->_c, tb_id);
-}
-
 static int call_ipmr_mfc_entry_notifiers(struct net *net,
 					 enum fib_event_type event_type,
 					 struct mfc_cache *mfc, u32 tb_id)
@@ -2950,38 +2931,8 @@ static unsigned int ipmr_seq_read(struct net *net)
 
 static int ipmr_dump(struct net *net, struct notifier_block *nb)
 {
-	struct mr_table *mrt;
-	int err;
-
-	err = ipmr_rules_dump(net, nb);
-	if (err)
-		return err;
-
-	ipmr_for_each_table(mrt, net) {
-		struct vif_device *v = &mrt->vif_table[0];
-		struct mr_mfc *mfc;
-		int vifi;
-
-		/* Notifiy on table VIF entries */
-		read_lock(&mrt_lock);
-		for (vifi = 0; vifi < mrt->maxvif; vifi++, v++) {
-			if (!v->dev)
-				continue;
-
-			call_ipmr_vif_entry_notifier(nb, net, FIB_EVENT_VIF_ADD,
-						     v, vifi, mrt->id);
-		}
-		read_unlock(&mrt_lock);
-
-		/* Notify on table MFC entries */
-		list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list)
-			call_ipmr_mfc_entry_notifier(nb, net,
-						     FIB_EVENT_ENTRY_ADD,
-						     (struct mfc_cache *)mfc,
-						     mrt->id);
-	}
-
-	return 0;
+	return mr_dump(net, nb, RTNL_FAMILY_IPMR, ipmr_rules_dump,
+		       ipmr_mr_table_iter, &mrt_lock);
 }
 
 static const struct fib_notifier_ops ipmr_notifier_ops_template = {

net/ipv4/ipmr_base.c

@@ -321,3 +321,45 @@ int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb,
 	return skb->len;
 }
 EXPORT_SYMBOL(mr_rtm_dumproute);
+
+int mr_dump(struct net *net, struct notifier_block *nb, unsigned short family,
+	    int (*rules_dump)(struct net *net,
+			      struct notifier_block *nb),
+	    struct mr_table *(*mr_iter)(struct net *net,
+					struct mr_table *mrt),
+	    rwlock_t *mrt_lock)
+{
+	struct mr_table *mrt;
+	int err;
+
+	err = rules_dump(net, nb);
+	if (err)
+		return err;
+
+	for (mrt = mr_iter(net, NULL); mrt; mrt = mr_iter(net, mrt)) {
+		struct vif_device *v = &mrt->vif_table[0];
+		struct mr_mfc *mfc;
+		int vifi;
+
+		/* Notifiy on table VIF entries */
+		read_lock(mrt_lock);
+		for (vifi = 0; vifi < mrt->maxvif; vifi++, v++) {
+			if (!v->dev)
+				continue;
+
+			mr_call_vif_notifier(nb, net, family,
+					     FIB_EVENT_VIF_ADD,
+					     v, vifi, mrt->id);
+		}
+		read_unlock(mrt_lock);
+
+		/* Notify on table MFC entries */
+		list_for_each_entry_rcu(mfc, &mrt->mfc_cache_list, list)
+			mr_call_mfc_notifier(nb, net, family,
+					     FIB_EVENT_ENTRY_ADD,
+					     mfc, mrt->id);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(mr_dump);