1 files changed, 23 insertions, 0 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 063721302ebf..1c6a084b5fb7 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1251,6 +1251,28 @@ out:
 }
 
 /*
+ *      Resend IGMP JOIN report; used for bonding.
+ */
+void ip_mc_rejoin_group(struct ip_mc_list *im)
+{
+        struct in_device *in_dev = im->interface;
+
+#ifdef CONFIG_IP_MULTICAST
+        if (im->multiaddr == IGMP_ALL_HOSTS)
+                return;
+
+        if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) {
+                igmp_mod_timer(im, IGMP_Initial_Report_Delay);
+                return;
+        }
+        /* else, v3 */
+        im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
+                IGMP_Unsolicited_Report_Count;
+        igmp_ifc_event(in_dev);
+#endif
+}
+
+/*
  *      A socket has left a multicast group on device dev
  */
 
@@ -2596,3 +2618,4 @@ int __init igmp_mc_proc_init(void)
 EXPORT_SYMBOL(ip_mc_dec_group);
 EXPORT_SYMBOL(ip_mc_inc_group);
 EXPORT_SYMBOL(ip_mc_join_group);
+EXPORT_SYMBOL(ip_mc_rejoin_group);