diff options
| author | Ian Campbell <Ian.Campbell@citrix.com> | 2010-05-26 00:09:42 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-13 13:19:49 -0700 |
| commit | ac33b999caed81edf848948cde358920dff3f31f (patch) | |
| tree | aa5768e332f2c459ac4ec3b579feb990e1e523ae /net/ipv4 | |
| parent | bdded112e09f6c94084fe6c69ebbfb561650a046 (diff) | |
arp_notify: allow drivers to explicitly request a notification event.
commit 06c4648d46d1b757d6b9591a86810be79818b60c upstream.
Currently such notifications are only generated when the device comes up or the
address changes. However one use case for these notifications is to enable
faster network recovery after a virtual machine migration (by causing switches
to relearn their MAC tables). A migration appears to the network stack as a
temporary loss of carrier and therefore does not trigger either of the current
conditions. Rather than adding carrier up as a trigger (which can cause issues
when interfaces a flapping) simply add an interface which the driver can use
to explicitly trigger the notification.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/devinet.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index cc35645d910a..f84f6dd0a325 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1076,6 +1076,7 @@ static int inetdev_event(struct notifier_block *this, unsigned long event, } ip_mc_up(in_dev); /* fall through */ + case NETDEV_NOTIFY_PEERS: case NETDEV_CHANGEADDR: /* Send gratuitous ARP to notify of link change */ if (IN_DEV_ARP_NOTIFY(in_dev)) { |