netdev - [PATCHv8 1/2] Interface group: core and netlink part

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Date:	Thu,  6 Mar 2008 15:03:58 +0100
From:	Laszlo Attila Toth <panther@...abit.hu>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Laszlo Attila Toth <panther@...abit.hu>
Subject: [PATCHv8 1/2] Interface group: core and netlink part

Interface groups let handle different interfaces together.
Modified net device structure and netlink interface.

Signed-off-by: Laszlo Attila Toth <panther@...abit.hu>
---
 include/linux/if_link.h   |    2 ++
 include/linux/netdevice.h |    3 +++
 net/core/rtnetlink.c      |    9 +++++++++
 3 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 84c3492..722b25c 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -79,6 +79,8 @@ enum
 	IFLA_LINKINFO,
 #define IFLA_LINKINFO IFLA_LINKINFO
 	IFLA_NET_NS_PID,
+	IFLA_IFGROUP,
+#define IFLA_IFGROUP IFLA_IFGROUP
 	__IFLA_MAX
 };
 
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index a2f0032..e50d439 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -546,6 +546,9 @@ struct net_device
 	/* Hardware header description */
 	const struct header_ops *header_ops;
 
+	/* interface group this interface belongs to */
+	unsigned int		ifgroup;
+
 	/*
 	 * This marks the end of the "visible" part of the structure. All
 	 * fields hereafter are internal to the system, and may change at
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 2bd9c5f..5fbbdc4 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -577,6 +577,7 @@ static inline size_t if_nlmsg_size(const struct net_device *dev)
 	       + nla_total_size(4) /* IFLA_MTU */
 	       + nla_total_size(4) /* IFLA_LINK */
 	       + nla_total_size(4) /* IFLA_MASTER */
+	       + nla_total_size(4) /* IFLA_IFGROUP */
 	       + nla_total_size(1) /* IFLA_OPERSTATE */
 	       + nla_total_size(1) /* IFLA_LINKMODE */
 	       + rtnl_link_get_size(dev); /* IFLA_LINKINFO */
@@ -614,6 +615,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	if (dev->master)
 		NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
 
+	if (dev->ifgroup)
+		NLA_PUT_U32(skb, IFLA_IFGROUP, dev->ifgroup);
+
 	if (dev->qdisc_sleeping)
 		NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id);
 
@@ -863,6 +867,11 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		write_unlock_bh(&dev_base_lock);
 	}
 
+	if (tb[IFLA_IFGROUP]) {
+		dev->ifgroup = nla_get_u32(tb[IFLA_IFGROUP]);
+	}
+
+
 	err = 0;
 
 errout:
-- 
1.5.2.5

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