netdev - Re: [PATCH v4 net-next 09/11] net: Add IPv6 flow label to flow

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Message-ID: <20150522081428.GH2138@nanopsycho.orion>
Date:	Fri, 22 May 2015 10:14:28 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Tom Herbert <tom@...bertland.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH v4 net-next 09/11] net: Add IPv6 flow label to flow_keys

Fri, May 22, 2015 at 02:11:44AM CEST, tom@...bertland.com wrote:
>In flow_dissector set the flow label in flow_keys for IPv6. This also
>removes the shortcircuiting of flow dissection when a non-zero label
>is present, the flow label can be considered to provide additional
>entropy for a hash.
>
>Signed-off-by: Tom Herbert <tom@...bertland.com>
>---
> include/net/flow_dissector.h |  4 +++-
> net/core/flow_dissector.c    | 37 +++++++++++++------------------------
> 2 files changed, 16 insertions(+), 25 deletions(-)
>
>diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
>index 08480fb..effe607 100644
>--- a/include/net/flow_dissector.h
>+++ b/include/net/flow_dissector.h
>@@ -28,7 +28,8 @@ struct flow_dissector_key_basic {
> };
> 
> struct flow_dissector_key_tags {
>-	u32	vlan_id:12;
>+	u32	vlan_id:12,
>+		flow_label:20;
> };
> 
> /**
>@@ -111,6 +112,7 @@ enum flow_dissector_key_id {
> 	FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */
> 	FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */
> 	FLOW_DISSECTOR_KEY_VLANID, /* struct flow_dissector_key_flow_tags */
>+	FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_label */


I think it makes sense to pair FLOW_DISSECTOR_KEY_* with
struct flow_dissector_key_*

How about to have FLOW_DISSECTOR_KEY_TAGS istead of VLANID and FLOW_LABEL?

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