[ovs-dev] [PATCH 1/2] datapath-windows: define mcgroup IDs for VPORT and other families

Nithin Raju nithin at vmware.com
Tue Aug 26 17:24:04 UTC 2014


hi Samuel,
Sure, I can trim the list to have only the OVS_WIN_NL_VPORT_MCGRP_ID defined and nothing else. Pls. do note that we also need the OVS_WIN_NL_MCGRP_START_ID.

I'll respin the patch and send it out.

thanks,
Nithin

On Aug 26, 2014, at 9:55 AM, Samuel Ghinet <sghinet at cloudbasesolutions.com>
 wrote:

> Hello Nithin,
> 
> If there are great odds that only the VPORT multicast group will be used, I think it would be best not to add the other multicast group ids.
> If a need will arise in the future to add support for multicast groups for datapath, packet, etc. it would be best done only then.
> 
> I think that simply keeping the #define-s with multicast group ids for packet, datapath, etc. may give the wrong impression to a reader of the code that all
> multicast groups are / may be used.
> 
> Perhaps it would be best if you could do something like:
> [PATCH]
> #define OVS_WIN_NL_INVALID_MCGRP_ID          0
> 
> /* only the VPORT multicast group is used. */
> #define OVS_WIN_NL_VPORT_MCGRP_ID            104
> [/PATCH]
> 
> Thanks,
> Sam
> ________________________________________
> Date: Fri, 22 Aug 2014 21:51:22 -0700
> From: Nithin Raju <nithin at vmware.com>
> To: dev at openvswitch.org
> Subject: [ovs-dev] [PATCH 1/2] datapath-windows: define mcgroup IDs
>        for     VPORT and other families
> Message-ID: <1408769483-3127-1-git-send-email-nithin at vmware.com>
> 
> dpif-linux.c makes a nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY) that is not
> implemented yet on Windows yet. Multicast group is used currently to
> subscribe to events related to VPORTs. Whether the exact same mechanism
> would be used is unclear yet.
> 
> In the interim, we can implement code to support nl_lookup_genl_mcgroup().
> and make progress with the other simpler commands.
> 
> In this patch, we define a ID for the VPORT MC group and other groups. The
> plan is to use only the VPORT MC group though.
> 
> Signed-off-by: Nithin Raju <nithin at vmware.com>
> ---
> datapath-windows/include/OvsDpInterfaceExt.h |    8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/datapath-windows/include/OvsDpInterfaceExt.h b/datapath-windows/include/OvsDpInterfaceExt.h
> index dd34512..24601ed 100644
> --- a/datapath-windows/include/OvsDpInterfaceExt.h
> +++ b/datapath-windows/include/OvsDpInterfaceExt.h
> @@ -54,6 +54,14 @@
> #define OVS_WIN_NL_VPORT_FAMILY_ID           4
> #define OVS_WIN_NL_FLOW_FAMILY_ID            5
> 
> +#define OVS_WIN_NL_INVALID_MCGRP_ID          0
> +#define OVS_WIN_NL_MCGRP_START_ID            100
> +#define OVS_WIN_NL_CTRL_MCGRP_ID             101
> +#define OVS_WIN_NL_DATAPATH_MCGRP_ID         102
> +#define OVS_WIN_NL_PACKET_MCGRP_ID           103
> +#define OVS_WIN_NL_VPORT_MCGRP_ID            104
> +#define OVS_WIN_NL_FLOW_MCGRP_ID             105
> +
> /*
>  * Define a family of netlink command specific to Windows. This is part of the
>  * extensions.
> --
> 1.7.4.1
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