Re: [dpdk-dev] [PATCH v3] net/i40e: solve vf vlan strip

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Qiming Chen
> Sent: Thursday, August 26, 2021 10:10 PM
> To: dev@dpdk.org
> Cc: Xing, Beilei <beilei.xing@intel.com>; Qiming Chen
> <chenqiming_huawei@163.com>
> Subject: [dpdk-dev] [PATCH v3] net/i40e: solve vf vlan strip
> 
> Kernel PF+DPDK VF mode, after vf adds vlan, the test result shows that the vlan
> received from vf has been stripped.
> 
> The patch solves the problem that the kernel i40e.ko driver strips the vlan by
> default after vf adds vlan. Determine whether to strip vlan through the
> DEV_RX_OFFLOAD_VLAN_STRIP mask bit in rxmode.offload.
> 
> Environmental information:
> 1) dpdk 19.11
> 2) Kernel PF i40e.ko: 2.7.12
> 3) Firmware: 6.01 0x800034a3 1.1747.0
> 
> I did not use testpmd to test vlan filter, but write Demo for testing based on
> the following deployment:
> 1) x710 nic, use 2 PFs, each PF virtualizes 1 VF
> 2) 2 pf connected with fiber optic cable
> 3) 2 vf are hard to pass through to the VM
> 4) In vm, dpdk takes over the vf port,
> 5) One port is used as the sending port, and the other port is used as the
> receiving port, e.g. xmit portid is 0, rx portid is 1
> 
> Use the default configuration for port 0 as the sender, and configure port 1 as
> the receiving port as follows:
> 1) rte_eth_dev_set_vlan_offload(1, ETH_VLAN_FILTER_OFFLOAD)
> 2) rte_eth_dev_vlan_filter(1, 100, 1)
> 
> Do the following tests:
> Demo constructs a message with vlan 100 to be sent from port 0, and found
> that the vlan header of the message received from port 1 was stripped.

As i40evf will be removed in DPDK 21.11, so please submit a patch target to LTS directly.

Thanks
Qi