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switchdev: Add support for flood control

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Allow devices supporting this feature to control the flooding of unknown
unicast traffic, by making switchdev infrastructure propagate this setting
to the switch driver.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2015-10-28 10:16:54 +01:00 committed by David S. Miller
parent 65bdc43d22
commit 741af0053b
2 changed files with 7 additions and 1 deletions
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3
Documentation/networking/switchdev.txt
View File

@ -298,6 +298,9 @@ packets up to the bridge driver for flooding. This is not ideal as the number
of ports scale in the L2 domain as the device is much more efficient at
flooding packets that software.
If supported by the device, flood control can be offloaded to it, preventing
certain netdevs from flooding unicast traffic for which there is no FDB entry.
IGMP Snooping
^^^^^^^^^^^^^

5
net/switchdev/switchdev.c
View File

@ -746,7 +746,7 @@ int switchdev_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
};
u16 mode = BRIDGE_MODE_UNDEF;
u32 mask = BR_LEARNING | BR_LEARNING_SYNC;
u32 mask = BR_LEARNING | BR_LEARNING_SYNC | BR_FLOOD;
int err;
err = switchdev_port_attr_get(dev, &attr);
@ -817,6 +817,9 @@ static int switchdev_port_br_setlink_protinfo(struct net_device *dev,
err = switchdev_port_br_setflag(dev, attr,
BR_LEARNING_SYNC);
break;
case IFLA_BRPORT_UNICAST_FLOOD:
err = switchdev_port_br_setflag(dev, attr, BR_FLOOD);
break;
default:
err = -EOPNOTSUPP;
break;