On Tue, Sep 8, 2015 at 1:54 PM, Ben Pfaff <b...@nicira.com> wrote:
> On Mon, Aug 31, 2015 at 07:57:05PM -0700, Jesse Gross wrote:
>> It is supposed to be possible to allow ovs-ofctl to filter flows
>> it is monitoring based on a match string. However, the parser will
>> reject expressions that match only on a field's existence (such as
>> Geneve options). This relaxes the restriction to bring it in line
>> with matches supported by other commands.
>>
>> Signed-off-by: Jesse Gross <je...@nicira.com>
>
> Might be another possible place to use ofputil_parse_key_value().
I changed it here too (actually, I folded it into the previous patch).
> Is this ability to match on the existence of a field documented
> anywhere? If not, it should be.
Yes, it was added to the ovs-ofctl man page when support was added:
tun_metadataidx[=value[/mask]]
Matches value either exactly or with optional mask in tunnel
metadata field number idx (numbered from 0 to 63). The act of
specifying a field implies a match on the existence of that
field in the packet in addition to the masked value. As a shortâ
hand, it is possible to specify only the field name to simply
match on an option being present.
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