1 files changed, 81 insertions, 5 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 2d65c6bb24c1..49f7ea5b4c75 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -868,6 +868,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 		   netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
 	NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
 	NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
+	NLA_PUT_U32(skb, IFLA_GROUP, dev->group);
 
 	if (dev->ifindex != dev->iflink)
 		NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
@@ -1035,6 +1036,7 @@ const struct nla_policy ifla_policy[IFLA_MAX+1] = {
 	[IFLA_MAP]		= { .len = sizeof(struct rtnl_link_ifmap) },
 	[IFLA_MTU]		= { .type = NLA_U32 },
 	[IFLA_LINK]		= { .type = NLA_U32 },
+	[IFLA_MASTER]		= { .type = NLA_U32 },
 	[IFLA_TXQLEN]		= { .type = NLA_U32 },
 	[IFLA_WEIGHT]		= { .type = NLA_U32 },
 	[IFLA_OPERSTATE]	= { .type = NLA_U8 },
@@ -1177,6 +1179,41 @@ static int do_setvfinfo(struct net_device *dev, struct nlattr *attr)
 	return err;
 }
 
+static int do_set_master(struct net_device *dev, int ifindex)
+{
+	struct net_device *master_dev;
+	const struct net_device_ops *ops;
+	int err;
+
+	if (dev->master) {
+		if (dev->master->ifindex == ifindex)
+			return 0;
+		ops = dev->master->netdev_ops;
+		if (ops->ndo_del_slave) {
+			err = ops->ndo_del_slave(dev->master, dev);
+			if (err)
+				return err;
+		} else {
+			return -EOPNOTSUPP;
+		}
+	}
+
+	if (ifindex) {
+		master_dev = __dev_get_by_index(dev_net(dev), ifindex);
+		if (!master_dev)
+			return -EINVAL;
+		ops = master_dev->netdev_ops;
+		if (ops->ndo_add_slave) {
+			err = ops->ndo_add_slave(master_dev, dev);
+			if (err)
+				return err;
+		} else {
+			return -EOPNOTSUPP;
+		}
+	}
+	return 0;
+}
+
 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		      struct nlattr **tb, char *ifname, int modified)
 {
@@ -1264,6 +1301,11 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 		modified = 1;
 	}
 
+	if (tb[IFLA_GROUP]) {
+		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
+		modified = 1;
+	}
+
 	/*
 	 * Interface selected by interface index but interface
 	 * name provided implies that a name change has been
@@ -1295,6 +1337,13 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
 			goto errout;
 	}
 
+	if (tb[IFLA_MASTER]) {
+		err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
+		if (err)
+			goto errout;
+		modified = 1;
+	}
+
 	if (tb[IFLA_TXQLEN])
 		dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
 
@@ -1541,6 +1590,8 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
 		set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
 	if (tb[IFLA_LINKMODE])
 		dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
+	if (tb[IFLA_GROUP])
+		dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
 
 	return dev;
 
@@ -1551,6 +1602,24 @@ err:
 }
 EXPORT_SYMBOL(rtnl_create_link);
 
+static int rtnl_group_changelink(struct net *net, int group,
+		struct ifinfomsg *ifm,
+		struct nlattr **tb)
+{
+	struct net_device *dev;
+	int err;
+
+	for_each_netdev(net, dev) {
+		if (dev->group == group) {
+			err = do_setlink(dev, ifm, tb, NULL, 0);
+			if (err < 0)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
 	struct net *net = sock_net(skb->sk);
@@ -1578,10 +1647,12 @@ replay:
 	ifm = nlmsg_data(nlh);
 	if (ifm->ifi_index > 0)
 		dev = __dev_get_by_index(net, ifm->ifi_index);
-	else if (ifname[0])
-		dev = __dev_get_by_name(net, ifname);
-	else
-		dev = NULL;
+	else {
+		if (ifname[0])
+			dev = __dev_get_by_name(net, ifname);
+		else
+			dev = NULL;
+	}
 
 	err = validate_linkmsg(dev, tb);
 	if (err < 0)
@@ -1645,8 +1716,13 @@ replay:
 			return do_setlink(dev, ifm, tb, ifname, modified);
 		}
 
-		if (!(nlh->nlmsg_flags & NLM_F_CREATE))
+		if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
+			if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
+				return rtnl_group_changelink(net,
+						nla_get_u32(tb[IFLA_GROUP]),
+						ifm, tb);
 			return -ENODEV;
+		}
 
 		if (ifm->ifi_index)
 			return -EOPNOTSUPP;