netdev - [PATCH net-next,v5] bonding: support balance-alb with openvswitch

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Message-ID: <9fe7297c-609e-208b-c77b-3ceef6eb51a4@redhat.com>
Date: Tue, 1 Aug 2023 14:37:50 +0200
From: Mat Kowalski <mko@...hat.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Cc: Jay Vosburgh <j.vosburgh@...il.com>, Andy Gospodarek
 <andy@...yhouse.net>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next,v5] bonding: support balance-alb with openvswitch

From: Mateusz Kowalski <mko@...hat.com>

Commit d5410ac7b0ba ("net:bonding:support balance-alb interface with
vlan to bridge") introduced a support for balance-alb mode for
interfaces connected to the linux bridge by fixing missing matching of
MAC entry in FDB. In our testing we discovered that it still does not
work when the bond is connected to the OVS bridge as show in diagram
below:

eth1(mac:eth1_mac)--bond0(balance-alb,mac:eth0_mac)--eth0(mac:eth0_mac)
                         |
                       bond0.150(mac:eth0_mac)
                         |
                       ovs_bridge(ip:bridge_ip,mac:eth0_mac)

This patch fixes it by checking not only if the device is a bridge but
also if it is an openvswitch.

Signed-off-by: Mateusz Kowalski <mko@...hat.com>
Reviewed-by: Simon Horman <horms@...nel.org>
---
v5 changes:
- Fix From: tag to match SoB
- Carry Reviewed-by: tag from v1

v4 changes:
- Fix additional space at the beginning of the line

v3 changes:
- Fix tab chars converted to spaces

v2 changes:
- Fix line wrapping

 drivers/net/bonding/bond_alb.c | 2 +-
 include/linux/netdevice.h      | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index b9dbad3a8af8..cc5049eb25f8 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -668,7 +668,7 @@ static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)

 	dev = ip_dev_find(dev_net(bond->dev), arp->ip_src);
 	if (dev) {
-		if (netif_is_bridge_master(dev)) {
+		if (netif_is_any_bridge_master(dev)) {
 			dev_put(dev);
 			return NULL;
 		}
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 84c36a7f873f..27593c0d3c15 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -5103,6 +5103,11 @@ static inline bool netif_is_ovs_port(const struct net_device *dev)
 	return dev->priv_flags & IFF_OVS_DATAPATH;
 }

+static inline bool netif_is_any_bridge_master(const struct net_device *dev)
+{
+	return netif_is_bridge_master(dev) || netif_is_ovs_master(dev);
+}
+
 static inline bool netif_is_any_bridge_port(const struct net_device *dev)
 {
 	return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);
-- 
2.41.0