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authorVlad Dogaru <ddvlad@rosedu.org>2011-01-13 23:38:31 +0000
committerDavid S. Miller <davem@davemloft.net>2011-01-19 23:31:10 -0800
commite7ed828f10bd89a28f821ae7f20e691704d61923 (patch)
treee1e19b5e6d7c2f5291a7ea6a09ff34cf631a3c67 /net/core/rtnetlink.c
parentcbda10fa97d72c7a1923be4426171aa90e8c6dab (diff)
downloadblackbird-op-linux-e7ed828f10bd89a28f821ae7f20e691704d61923.tar.gz
blackbird-op-linux-e7ed828f10bd89a28f821ae7f20e691704d61923.zip
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: Vlad Dogaru <ddvlad@rosedu.org> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/rtnetlink.c')
-rw-r--r--net/core/rtnetlink.c32
1 files changed, 28 insertions, 4 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 09062b07bf7f..a0b2eeb3b610 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1558,6 +1558,24 @@ 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);
@@ -1585,10 +1603,16 @@ 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 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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