bonding: fix to rejoin multicast groups immediately
The IGMP specs states that if the system receives a
membership report, it shouldn't send another for the
next minute. However, if a link failure happens right
after that, the backup slave and the switch connected
to this slave will not know about the multicast and
the traffic will hang for about a minute.
This patch fixes it to rejoin multicast groups immediately
after a failover restoring the multicast traffic.
Signed-off-by: Flavio Leitner <fleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 2a4bb76..25f3396 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1269,14 +1269,14 @@
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);
+ /* a failover is happening and switches
+ * must be notified immediately */
+ if (IGMP_V1_SEEN(in_dev))
+ igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);
+ else if (IGMP_V2_SEEN(in_dev))
+ igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);
+ else
+ igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);
#endif
}
EXPORT_SYMBOL(ip_mc_rejoin_group);