netdev - [PATCH 2/6] bridge: add new attribute IFLA_BRIDGE_VLAN_RANGE

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Message-Id: <1419887132-7084-3-git-send-email-roopa@cumulusnetworks.com>
Date:	Mon, 29 Dec 2014 13:05:28 -0800
From:	roopa@...ulusnetworks.com
To:	netdev@...r.kernel.org, shemminger@...tta.com, vyasevic@...hat.com
Cc:	Roopa Prabhu <roopa@...ulusnetworks.com>,
	Wilson Kok <wkok@...ulusnetworks.com>
Subject: [PATCH 2/6] bridge: add new attribute IFLA_BRIDGE_VLAN_RANGE_INFO to represent vlan range

From: Roopa Prabhu <roopa@...ulusnetworks.com>

This patch adds new bridge netlink attribute IFLA_BRIDGE_VLAN_RANGE_INFO
to represent vlan range.

Current IFLA_BRIDGE_VLAN_INFO attribute represents a single vlan and
does not scale well when the port has large number of vlans.

IFLA_BRIDGE_VLAN_RANGE_INFO is similar to IFLA_BRIDGE_VLAN_INFO but helps
with packing consecutive vlans in a single attribute. Thus reducing the
size of the netlink msg during adds and also during dumps.

Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
Signed-off-by: Wilson Kok <wkok@...ulusnetworks.com>
---
 include/uapi/linux/if_bridge.h |    7 +++++++
 net/bridge/br_netlink.c        |    2 ++
 2 files changed, 9 insertions(+)

diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index b03ee8f..d41a346 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -118,6 +118,7 @@ enum {
 	IFLA_BRIDGE_FLAGS,
 	IFLA_BRIDGE_MODE,
 	IFLA_BRIDGE_VLAN_INFO,
+	IFLA_BRIDGE_VLAN_RANGE_INFO,
 	__IFLA_BRIDGE_MAX,
 };
 #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
@@ -131,6 +132,12 @@ struct bridge_vlan_info {
 	__u16 vid;
 };
 
+struct bridge_vlan_range_info {
+	__u16 flags;
+	__u16 vid;
+	__u16 vid_end;
+};
+
 /* Bridge multicast database attributes
  * [MDBA_MDB] = {
  *     [MDBA_MDB_ENTRY] = {
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 75971b1..e7d1fc0 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -223,6 +223,8 @@ static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = {
 	[IFLA_BRIDGE_MODE]	= { .type = NLA_U16 },
 	[IFLA_BRIDGE_VLAN_INFO]	= { .type = NLA_BINARY,
 				    .len = sizeof(struct bridge_vlan_info), },
+	[IFLA_BRIDGE_VLAN_RANGE_INFO] = { .type = NLA_BINARY,
+			 .len = sizeof(struct bridge_vlan_range_info), },
 };
 
 static int br_afspec(struct net_bridge *br,
-- 
1.7.10.4

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