I was about to propose this for the patch 2/6,

Acked-by: Jarno Rajahalme <[email protected]>

> On Nov 11, 2015, at 11:39 AM, Joe Stringer <[email protected]> wrote:
> 
> Typically the datapath will support all available features, so check
> that first before attempting to retrieve various values out of a
> minimask as the latter doesn't need to be checked if all fields are
> supported.
> 
> ct_state is an exception, because support for the bits in this field is
> not binary; only some bits are defined so far, so they must still be
> checked against the current known supported bits.
> 
> Suggested-by: Jarno Rajahalme <[email protected]>
> Signed-off-by: Joe Stringer <[email protected]>
> ---
> ofproto/ofproto-dpif.c | 5 +++++
> 1 file changed, 5 insertions(+)
> 
> diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
> index ee2d267ab7b8..f0a2ca59e2e8 100644
> --- a/ofproto/ofproto-dpif.c
> +++ b/ofproto/ofproto-dpif.c
> @@ -4022,6 +4022,11 @@ rule_check(struct rule *rule)
> 
>     support = &ofproto_dpif_get_support(ofproto)->odp;
>     ct_state = MINIFLOW_GET_U16(&rule->cr.match.mask->masks, ct_state);
> +    if (support->ct_state && support->ct_zone && support->ct_mark
> +        && support->ct_label) {
> +        return ct_state & CS_UNSUPPORTED_MASK ? OFPERR_OFPBMC_BAD_MASK : 0;
> +    }
> +
>     ct_zone = MINIFLOW_GET_U16(&rule->cr.match.mask->masks, ct_zone);
>     ct_mark = MINIFLOW_GET_U32(&rule->cr.match.mask->masks, ct_mark);
>     ct_label = MINIFLOW_GET_U128(&rule->cr.match.mask->masks, ct_label);
> -- 
> 2.1.4
> 

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