Hi Konstantin,

On 05/23/2016 10:59 AM, Ananyev, Konstantin wrote:

Hi Olivier,

quoted

-----Original Message-----
From: Olivier Matz [mailto:olivier.matz@6wind.com]
Sent: Monday, May 23, 2016 9:47 AM
To: dev@dpdk.org
Cc: johndale@cisco.com; Ananyev, Konstantin; Zhang, Helin; adrien.mazarguil@6wind.com; rahul.lakkireddy@chelsio.com;
alejandro.lucero@netronome.com; sony.chacko@qlogic.com
Subject: [PATCH] mbuf: new flag when Vlan is stripped

The behavior of PKT_RX_VLAN_PKT was not very well defined, resulting in
PMDs not advertising the same flags in similar conditions.

Following discussion in [1], introduce 2 new flags PKT_RX_VLAN_STRIPPED
and PKT_RX_QINQ_STRIPPED that are better defined:

  PKT_RX_VLAN_STRIPPED: a vlan has been stripped by the hardware and its
  tci is saved in mbuf->vlan_tci. This can only happen if vlan stripping
  is enabled in the RX configuration of the PMD.

For now, the old flag PKT_RX_VLAN_PKT is kept but marked as deprecated.
It should be removed from applications and PMDs in a future revision.

This patch also updates the drivers. For PKT_RX_VLAN_PKT:

- e1000, enic, i40e, mlx5, nfp, vmxnet3: done, PKT_RX_VLAN_PKT already
  had the same meaning than PKT_RX_VLAN_STRIPPED, minor update is
  required.
- fm10k: done, PKT_RX_VLAN_PKT already had the same meaning than
  PKT_RX_VLAN_STRIPPED, and vlan stripping is always enabled on fm10k.
- ixgbe: modification done for standard mode (vector does not support
  vlan stripping)
- the other drivers do not support vlan stripping.

For PKT_RX_QINQ_PKT, it was only supported on i40e, and the meaning was
already correct, so we can reuse the same value for PKT_RX_QINQ_STRIPPED.

I don't see ixgbe/i4oe_rxtx_vec.c updated.
Would it be another patch for them?

The ixgbe vector and i40e vector do not support vlan stripping, so
from what I see there is nothing to do:
- The new flag PKT_RX_VLAN_STRIPPED is never returned
- We keep the old behavior for PKT_RX_VLAN_PKT.

Thanks,
Olivier