Re: [dpdk-dev] [PATCH] net/i40e: fix FDIR input set conflict

["Xing, Beilei" <beilei.xing@intel.com>]

> -----Original Message-----
> From: Zhang, Qi Z
> Sent: Tuesday, December 19, 2017 9:21 PM
> To: Xing, Beilei <beilei.xing@intel.com>
> Cc: dev@dpdk.org
> Subject: RE: [PATCH] net/i40e: fix FDIR input set conflict
> 
> 
> 
> > -----Original Message-----
> > From: Xing, Beilei
> > Sent: Monday, December 18, 2017 1:21 PM
> > To: Zhang, Qi Z <qi.z.zhang@intel.com>
> > Cc: dev@dpdk.org
> > Subject: [PATCH] net/i40e: fix FDIR input set conflict
> >
> > The first FDIR rule for some PCTYPE will configure input set and
> > create flow, the following flows must use the same input set,
> > otherwise will cause input set conflict and fail to create flow.
> > But if creating the first rule after flow flush, input set should be
> > re-configured.
> >
> > Fixes: 42044b69c67d ("net/i40e: support input set selection for FDIR")
> > c: stable@dpdk.org
> >
> > Signed-off-by: Beilei Xing <beilei.xing@intel.com>
> > ---
> >  drivers/net/i40e/i40e_flow.c | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/net/i40e/i40e_flow.c
> > b/drivers/net/i40e/i40e_flow.c index 7e4936e..a9e7a0d 100644
> > --- a/drivers/net/i40e/i40e_flow.c
> > +++ b/drivers/net/i40e/i40e_flow.c
> > @@ -4406,6 +4406,7 @@ i40e_flow_flush_fdir_filter(struct i40e_pf *pf)
> >  	struct rte_eth_dev *dev = pf->adapter->eth_dev;
> >  	struct i40e_fdir_info *fdir_info = &pf->fdir;
> >  	struct i40e_fdir_filter *fdir_filter;
> > +	enum i40e_filter_pctype pctype;
> >  	struct rte_flow *flow;
> >  	void *temp;
> >  	int ret;
> > @@ -4427,6 +4428,10 @@ i40e_flow_flush_fdir_filter(struct i40e_pf *pf)
> >  				rte_free(flow);
> >  			}
> >  		}
> > +
> > +		for (pctype = I40E_FILTER_PCTYPE_NONF_IPV4_UDP;
> > +		     pctype <= I40E_FILTER_PCTYPE_L2_PAYLOAD; pctype++)
> > +			pf->fdir.inset_flag[pctype] = 0;
> >  	}
> >
> >  	return ret;
> > --
> > 2.5.5
> 
> Acked-by: Qi Zhang <qi.z.zhang@intel.com>
> 
> BTW, do we also need a fix for flow destroy? When the last flow that use
> input set be destroyed, inset_flag also need to be reset?

Thanks for the comments.
Actually input set re-configuration after flow flush is required by customer. But for the above case, in my opinion, it's not needed currently. For i40e, rte flow includes input set configuration and creating flow, we'd better to keep the global configuration.

> 
> Regards
> Qi