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SubjectRe: [PATCH v1] net:bonding:support balance-alb interface with vlan to bridge
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On 08/08/2022 12:41, Sun Shouxin wrote:
> In my test, balance-alb bonding with two slaves eth0 and eth1,
> and then Bond0.150 is created with vlan id attached bond0.
> After adding bond0.150 into one linux bridge, I noted that Bond0,
> bond0.150 and bridge were assigned to the same MAC as eth0.
> Once bond0.150 receives a packet whose dest IP is bridge's
> and dest MAC is eth1's, the linux bridge cannot process it as expected.
> The patch fix the issue, and diagram as below:
>
> eth1(mac:eth1_mac)--bond0(balance-alb,mac:eth0_mac)--eth0(mac:eth0_mac)
> |
> bond0.150(mac:eth0_mac)
> |
> bridge(ip:br_ip, mac:eth0_mac)--other port
>
> Suggested-by: Hu Yadi <huyd12@chinatelecom.cn>
> Signed-off-by: Sun Shouxin <sunshouxin@chinatelecom.cn>
> ---
> drivers/net/bonding/bond_alb.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
> index 007d43e46dcb..0dea04f00f12 100644
> --- a/drivers/net/bonding/bond_alb.c
> +++ b/drivers/net/bonding/bond_alb.c
> @@ -654,6 +654,7 @@ static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
> {
> struct slave *tx_slave = NULL;
> struct arp_pkt *arp;
> + struct net_device *dev;

reverse xmas tree order

>
> if (!pskb_network_may_pull(skb, sizeof(*arp)))
> return NULL;
> @@ -665,6 +666,13 @@ static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
> if (!bond_slave_has_mac_rx(bond, arp->mac_src))
> return NULL;
>
> + dev = ip_dev_find(dev_net(bond->dev), arp->ip_src);
> + if (dev) {
> + if (netif_is_bridge_master(dev)) {
> + return NULL;
> + }

nit: the {} aren't needed

> + }
> +
> if (arp->op_code == htons(ARPOP_REPLY)) {
> /* the arp must be sent on the selected rx channel */
> tx_slave = rlb_choose_channel(skb, bond, arp);

Aside from the small cosmetic comments, have you tried adding the second mac address
as permanent in the bridge?
i.e.:
$ bridge fdb add <eth1_mac> dev bond0.150 master permanent

That should fix your problem without any bonding hacks.

Cheers,
Nik


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