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To: luyicai <luyicai@huawei.com>, <dev@dpdk.org>, Thomas Monjalon
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CC: <chas3@att.com>, <zhangliang@bigo.sg>, <chenchanghu@huawei.com>,
<jerry.lilijun@huawei.com>, <haifeng.lin@huawei.com>,
<guohongzhi1@huawei.com>, <stable@dpdk.org>, "Wei Hu (Xavier)"
<xavier.huwei@huawei.com>
From: "Wei Hu (Xavier)" <xavier.huwei@huawei.com>
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Date: Sat, 11 Jul 2020 09:20:52 +0800
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Subject: Re: [dpdk-dev] [PATCH V2] net/bonding: fix lacp negotiation failed
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Reviewed-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
On 2020/7/10 11:29, luyicai wrote:
> From: Yicai Lu <luyicai@huawei.com>
>
> When two host is connected directly without any devices like switch,
> rx_machine_update would recieving partner lacp negotiation packets,
> and partner's port mac is filled with zeros in this packet,
> which is different with internal's mode4 mac. So in this situation,
> it would never go rx_machine branch and then execute mac swap for negotiation!
> Thus bond mode 4 will negotiation failed.
>
> Fixes: 56cbc0817399 ("net/bonding: fix LACP negotiation")
> Cc: stable@dpdk.org
>
> Signed-off-by: luyicai <luyicai@huawei.com>
> ---
> v1 -> v2: Adjust commit info style
> ---
> drivers/net/bonding/rte_eth_bond_8023ad.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/bonding/rte_eth_bond_8023ad.c b/drivers/net/bonding/rte_eth_bond_8023ad.c
> index b77a37d..2002ec0 100644
> --- a/drivers/net/bonding/rte_eth_bond_8023ad.c
> +++ b/drivers/net/bonding/rte_eth_bond_8023ad.c
> @@ -798,7 +798,8 @@
> RTE_ASSERT(lacp->lacpdu.subtype == SLOW_SUBTYPE_LACP);
>
> partner = &lacp->lacpdu.partner;
> - if (rte_is_same_ether_addr(&partner->port_params.system,
> + if (rte_is_zero_ether_addr(&partner->port_params.system) ||
> + rte_is_same_ether_addr(&partner->port_params.system,
> &internals->mode4.mac_addr)) {
> /* This LACP frame is sending to the bonding port
> * so pass it to rx_machine.