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Date: Wed, 27 Nov 2013 22:35:12 +0000 From: Thomas Graf <tgraf@...g.ch> To: Jesse Gross <jesse@...ira.com> Cc: David Miller <davem@...emloft.net>, "dev@...nvswitch.org" <dev@...nvswitch.org>, netdev <netdev@...r.kernel.org>, Daniel Borkmann <dborkman@...hat.com>, ffusco@...hat.com, fleitner@...hat.com, Eric Dumazet <eric.dumazet@...il.com>, Ben Hutchings <bhutchings@...arflare.com> Subject: Re: [PATCH net-next 7/8] openvswitch: Drop user features if old user space attempted to create datapath On 11/25/13 at 03:40pm, Jesse Gross wrote: > On Fri, Nov 22, 2013 at 8:56 AM, Thomas Graf <tgraf@...g.ch> wrote: > > diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h > > index 07ef2c3..a6863e2 100644 > > --- a/include/uapi/linux/openvswitch.h > > +++ b/include/uapi/linux/openvswitch.h > > @@ -40,7 +40,15 @@ struct ovs_header { > > > > #define OVS_DATAPATH_FAMILY "ovs_datapath" > > #define OVS_DATAPATH_MCGROUP "ovs_datapath" > > -#define OVS_DATAPATH_VERSION 0x1 > > + > > +/* V2: > > + * - API users are expected to provide OVS_DP_ATTR_USER_FEATURES > > + * with NLM_F_REPLACE when creating the datapath. > > + */ > > +#define OVS_DATAPATH_VERSION 2 > > I'm not sure that I understand this comment - I guess it means that > there's no legacy path when using NLM_F_REPLACE? It means that if the V2 caller does not provide user features the existing user features are preserved upon NLM_F_REPLACE. V1 users can't be aware and the user features are always reset. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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