@@ -17,6 +17,9 @@
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/stringify.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <net/net_namespace.h>
#include <asm/machdep.h>
#include <asm/rtas.h>
@@ -331,6 +334,8 @@ void post_mobility_fixup(void)
{
int rc;
int activate_fw_token;
+ struct net_device *netdev;
+ struct net *net;
activate_fw_token = rtas_token("ibm,activate-firmware");
if (activate_fw_token == RTAS_UNKNOWN_SERVICE) {
@@ -371,6 +376,22 @@ void post_mobility_fixup(void)
/* Possibly switch to a new RFI flush type */
pseries_setup_rfi_flush();
+ /* need to force a gratuitous ARP on running interfaces */
+ rtnl_lock();
+ for_each_net(net) {
+ for_each_netdev(net, netdev) {
+ if (netif_device_present(netdev) &&
+ netif_running(netdev) &&
+ !(netdev->flags & (IFF_NOARP | IFF_LOOPBACK))) {
+ call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
+ netdev);
+ call_netdevice_notifiers(NETDEV_RESEND_IGMP,
+ netdev);
+ }
+ }
+ }
+ rtnl_unlock();
+
return;
}
After a migration, it is necessary to send a gratuitous ARP from all running interfaces so that the rest of the network is aware of its new location. However, some supported network devices are unaware that they have been migrated. To avoid network interruptions and other unwanted behavior, force a GARP on all valid, running interfaces as part of the post_mobility_fixup routine. Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com> --- v2: fix missing brackets caught by Russell Currey --- arch/powerpc/platforms/pseries/mobility.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)