--- zzzz-none-000/linux-5.4.213/include/linux/mroute.h	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/include/linux/mroute.h	2024-05-29 11:20:02.000000000 +0000
@@ -84,4 +84,42 @@
 int ipmr_get_route(struct net *net, struct sk_buff *skb,
 		   __be32 saddr, __be32 daddr,
 		   struct rtmsg *rtm, u32 portid);
+
+#define IPMR_MFC_EVENT_UPDATE   1
+#define IPMR_MFC_EVENT_DELETE   2
+
+/*
+ * Callback to registered modules in the event of updates to a multicast group
+ */
+typedef void (*ipmr_mfc_event_offload_callback_t)(__be32 origin, __be32 group,
+						  u32 max_dest_dev,
+						  u32 dest_dev_idx[],
+						  u8 op);
+
+/*
+ * Register the callback used to inform offload modules when updates occur to
+ * MFC. The callback is registered by offload modules
+ */
+extern bool ipmr_register_mfc_event_offload_callback(
+			ipmr_mfc_event_offload_callback_t mfc_offload_cb);
+
+/*
+ * De-Register the callback used to inform offload modules when updates occur
+ * to MFC
+ */
+extern void ipmr_unregister_mfc_event_offload_callback(void);
+
+/*
+ * Find the destination interface list, given a multicast group and source
+ */
+extern int ipmr_find_mfc_entry(struct net *net, __be32 origin, __be32 group,
+				 u32 max_dst_cnt, u32 dest_dev[]);
+
+/*
+ * Out-of-band multicast statistics update for flows that are offloaded from
+ * Linux
+ */
+extern int ipmr_mfc_stats_update(struct net *net, __be32 origin, __be32 group,
+				 u64 pkts_in, u64 bytes_in,
+				 u64 pkts_out, u64 bytes_out);
 #endif