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macvlan: Allow setting multicast filter on all macvlan types

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Currently, macvlan code restricts multicast and unicast
filter setting only to passthru devices.  As a result,
if a guest using macvtap wants to receive multicast
traffic, it has to set IFF_ALLMULTI or IFF_PROMISC.

This patch makes it possible to use the fdb interface
to add multicast addresses to the filter thus allowing
a guest to receive only targeted multicast traffic.

CC: John Fastabend <john.r.fastabend@intel.com>
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Jason Wang <jasowang@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2014-08-15 13:04:59 -04:00 committed by David S. Miller
parent dc808110bb
commit 8a50f11c3b
1 changed files with 8 additions and 2 deletions
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10
drivers/net/macvlan.c
View File

@ -739,7 +739,10 @@ static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct macvlan_dev *vlan = netdev_priv(dev);
int err = -EINVAL;
if (!vlan->port->passthru)
/* Support unicast filter only on passthru devices.
* Multicast filter should be allowed on all devices.
*/
if (!vlan->port->passthru && is_unicast_ether_addr(addr))
return -EOPNOTSUPP;
if (flags & NLM_F_REPLACE)
@ -760,7 +763,10 @@ static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
struct macvlan_dev *vlan = netdev_priv(dev);
int err = -EINVAL;
if (!vlan->port->passthru)
/* Support unicast filter only on passthru devices.
* Multicast filter should be allowed on all devices.
*/
if (!vlan->port->passthru && is_unicast_ether_addr(addr))
return -EOPNOTSUPP;
if (is_unicast_ether_addr(addr))