Commit e7ed828f authored by Vlad Dogaru's avatar Vlad Dogaru Committed by David S. Miller

netlink: support setting devgroup parameters

If a rtnetlink request specifies a negative or zero ifindex and has no
interface name attribute, but has a group attribute, then the chenges
are made to all the interfaces belonging to the specified group.
Signed-off-by: default avatarVlad Dogaru <ddvlad@rosedu.org>
Acked-by: default avatarJamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cbda10fa
......@@ -1558,6 +1558,24 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
}
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);
......@@ -1585,10 +1603,16 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
ifm = nlmsg_data(nlh);
if (ifm->ifi_index > 0)
dev = __dev_get_by_index(net, ifm->ifi_index);
else if (ifname[0])
else {
if (ifname[0])
dev = __dev_get_by_name(net, ifname);
else if (tb[IFLA_GROUP])
return rtnl_group_changelink(net,
nla_get_u32(tb[IFLA_GROUP]),
ifm, tb);
else
dev = NULL;
}
err = validate_linkmsg(dev, tb);
if (err < 0)
......
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