netdev - Re: [ovs-dev] [PATCH net-next v21 4/4] openvswitch: report error on VLAN nlattr in ovs_key_from

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Message-ID: <20160903155937.GI31705@egarver>
Date:   Sat, 3 Sep 2016 11:59:37 -0400
From:   Eric Garver <e@...g.me>
To:     pravin shelar <pshelar@....org>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        ovs dev <dev@...nvswitch.org>,
        Thomas F Herbert <thomasfherbert@...il.com>
Subject: Re: [ovs-dev] [PATCH net-next v21 4/4] openvswitch: report error on
 VLAN nlattr in ovs_key_from_nlattrs()

On Fri, Sep 02, 2016 at 02:42:41PM -0700, pravin shelar wrote:
> On Thu, Sep 1, 2016 at 1:45 PM, Eric Garver <e@...g.me> wrote:
> > With 802.1ad support these are parsed and set upfront by
> > parse_vlan_from_nlattrs() before ovs_key_from_nlattrs() is ever called.
> > As such we should never see a VLAN attribute in ovs_key_from_nlattrs().
> >
> > Signed-off-by: Eric Garver <e@...g.me>
> > ---
> >  net/openvswitch/flow_netlink.c | 19 +++++--------------
> >  1 file changed, 5 insertions(+), 14 deletions(-)
> >
> > diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
> > index fbe9e0e4792d..0f36aead744b 100644
> > --- a/net/openvswitch/flow_netlink.c
> > +++ b/net/openvswitch/flow_netlink.c
> > @@ -923,20 +923,11 @@ static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
> >         }
> >
> >         if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
> > -               __be16 tci;
> > -
> > -               tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
> > -               if (!(tci & htons(VLAN_TAG_PRESENT))) {
> > -                       if (is_mask)
> > -                               OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
> > -                       else
> > -                               OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
> > -
> > -                       return -EINVAL;
> > -               }
> > -
> > -               SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
> > -               attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
> > +               /* VLAN attribute is always parsed before getting here since it may
> > +                * occur multiple times.
> > +                */
> > +               OVS_NLERR(log, "VLAN attribute unexpected.");
> > +               return -EINVAL;
> >         }
> >
> Is there reason for not merging this patch with earlier patch?

Not a particularly good one. I'll merge it into patch 3.