[PATCH v2] net/iavf: fix VLAN offload strip flag

[Amiya Ranjan Mohakud]

Thanks.

Just wanted to know  - what are the next steps of the review and approval
process?

There is a test suite "ci/intel-Testing" failing now with v2 which passed
in v1. ( We know for sure, there is absolutely no code change between v1
and v2 except the commit message). Is there a way to trigger the test suite
again?

Thanks
Amiya


On Tue, 24 Jun 2025 at 14:49, Loftus, Ciara <ciara.loftus at intel.com> wrote:

> > Subject: Re: [PATCH v2] net/iavf: fix VLAN offload strip flag
> >
> > Hi Ciara
> > Thanks for your effort in reproducing the issue and confirming that the
> patch
> > works. However, I have taken care of the indentation in the commit
> message
> > and sent out a v2 patch. Appreciate your review comments.
> >
> > >>>Perhaps we should make the disabling unconditional or even better
> make it
> > depend on if the stripping was enabled although I'm not sure if there's
> a way
> > to check for this.
> >
> > I understand and agree with your point of disabling vlan_strip after
> checking if
> > the stripping is enabled. But like you mentioned, I'm also not sure if
> there is
> > any way to know that.
> >
> > However, I think, the current check also does a good job by checking the
> > dev_conf parameter against RTE_ETH_RX_OFFLOAD_VLAN_STRIP and re-
> > disables the vlan_strip after every vlan_add operation.
>
> Thanks for the v2.
> I think this approach is fine for now, it matches what was already in
> place for VIRTCHNL_VF_OFFLOAD_VLAN(V1).
> A future improvement would be to find a way to determine if the stripping
> was re-enabled and only attempt to disable in that case.
>
> >
> >
> > Thanks
> > Amiya
> >
> >
> > On Mon, 23 Jun 2025 at 23:41, Amiya Ranjan Mohakud
> > <mailto:amiyaranjan.mohakud at gmail.com> wrote:
> > For i40e kernel drivers which support either vlan(v1) or vlan(v2)
> > VIRTCHNL OP,it will set strip on when setting filter on. But dpdk
> > side will not change strip flag. To be consistent with dpdk side,
> > explicitly disable strip again.
> >
> > Bugzilla ID:1725
> > Cc: mailto:stable at dpdk.org
> >
> > v2:
> > - Fixed indentation in commit message
> >
> > Signed-off-by: Amiya Ranjan Mohakud
> > <mailto:amiyaranjan.mohakud at gmail.com>
> > ---
> >  drivers/net/intel/iavf/iavf_ethdev.c | 48 +++++++++++++++++-----------
> >  1 file changed, 29 insertions(+), 19 deletions(-)
> >
> > diff --git a/drivers/net/intel/iavf/iavf_ethdev.c
> > b/drivers/net/intel/iavf/iavf_ethdev.c
> > index b3dacbef84..f93e7bf9ae 100644
> > --- a/drivers/net/intel/iavf/iavf_ethdev.c
> > +++ b/drivers/net/intel/iavf/iavf_ethdev.c
> > @@ -1378,13 +1378,38 @@ iavf_dev_del_mac_addr(struct rte_eth_dev
> > *dev, uint32_t index)
> >         vf->mac_num--;
> >  }
> >
> > +static int
> > +iavf_disable_vlan_strip_ex(struct rte_eth_dev *dev, int on)
> > +{
> > +       /* For i40e kernel drivers which supports both vlan(v1 & v2)
> VIRTCHNL
> > OP,
> > +        * it will set strip on when setting filter on but dpdk side
> will not
> > +        * change strip flag. To be consistent with dpdk side,
> explicitly disable
> > +        * strip again.
> > +        *
> > +        */
> > +       struct iavf_adapter *adapter =
> > +               IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
> > +       struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
> > +       int err;
> > +
> > +       if (adapter->hw.mac.type == IAVF_MAC_XL710 ||
> > +           adapter->hw.mac.type == IAVF_MAC_VF ||
> > +           adapter->hw.mac.type == IAVF_MAC_X722_VF) {
> > +               if (on && !(dev_conf->rxmode.offloads &
> > RTE_ETH_RX_OFFLOAD_VLAN_STRIP)) {
> > +                       err = iavf_disable_vlan_strip(adapter);
> > +                       if (err)
> > +                               return -EIO;
> > +               }
> > +       }
> > +       return 0;
> > +}
> > +
> >  static int
> >  iavf_dev_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int
> on)
> >  {
> >         struct iavf_adapter *adapter =
> >                 IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
> >         struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
> > -       struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
> >         int err;
> >
> >         if (adapter->closed)
> > @@ -1394,7 +1419,8 @@ iavf_dev_vlan_filter_set(struct rte_eth_dev *dev,
> > uint16_t vlan_id, int on)
> >                 err = iavf_add_del_vlan_v2(adapter, vlan_id, on);
> >                 if (err)
> >                         return -EIO;
> > -               return 0;
> > +
> > +               return iavf_disable_vlan_strip_ex(dev, on);
> >         }
> >
> >         if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN))
> > @@ -1404,23 +1430,7 @@ iavf_dev_vlan_filter_set(struct rte_eth_dev *dev,
> > uint16_t vlan_id, int on)
> >         if (err)
> >                 return -EIO;
> >
> > -       /* For i40e kernel driver which only supports vlan(v1) VIRTCHNL
> OP,
> > -        * it will set strip on when setting filter on but dpdk side
> will not
> > -        * change strip flag. To be consistent with dpdk side, disable
> strip
> > -        * again.
> > -        *
> > -        * For i40e kernel driver which supports vlan v2, dpdk will
> invoke vlan v2
> > -        * related function, so it won't go through here.
> > -        */
> > -       if (adapter->hw.mac.type == IAVF_MAC_XL710 ||
> > -           adapter->hw.mac.type == IAVF_MAC_X722_VF) {
> > -               if (on && !(dev_conf->rxmode.offloads &
> > RTE_ETH_RX_OFFLOAD_VLAN_STRIP)) {
> > -                       err = iavf_disable_vlan_strip(adapter);
> > -                       if (err)
> > -                               return -EIO;
> > -               }
> > -       }
> > -       return 0;
> > +       return iavf_disable_vlan_strip_ex(dev, on);
> >  }
> >
> >  static void
> > --
> > 2.39.5 (Apple Git-154)
>
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