* [Patch net-next v2] net: allow to delete a whole device group
@ 2015-03-24 18:53 Cong Wang
2015-03-24 19:41 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Cong Wang @ 2015-03-24 18:53 UTC (permalink / raw)
To: netdev; +Cc: Cong Wang, Stephen Hemminger
With dev group, we can change a batch of net devices,
so we should allow to delete them together too.
Group 0 is not allowed to be deleted since it is
the default group.
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
---
net/core/rtnetlink.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index e769510..b96ac21 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1836,6 +1836,42 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
return err;
}
+static int rtnl_group_dellink(const struct net *net, int group)
+{
+ struct net_device *dev, *aux;
+ LIST_HEAD(list_kill);
+ bool found = false;
+
+ if (!group)
+ return -EPERM;
+
+ for_each_netdev(net, dev) {
+ if (dev->group == group) {
+ const struct rtnl_link_ops *ops;
+
+ found = true;
+ ops = dev->rtnl_link_ops;
+ if (!ops || !ops->dellink)
+ return -EOPNOTSUPP;
+ }
+ }
+
+ if (!found)
+ return -ENODEV;
+
+ for_each_netdev_safe(net, dev, aux) {
+ if (dev->group == group) {
+ const struct rtnl_link_ops *ops;
+
+ ops = dev->rtnl_link_ops;
+ ops->dellink(dev, &list_kill);
+ }
+ }
+ unregister_netdevice_many(&list_kill);
+
+ return 0;
+}
+
static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
@@ -1859,6 +1895,8 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
dev = __dev_get_by_index(net, ifm->ifi_index);
else if (tb[IFLA_IFNAME])
dev = __dev_get_by_name(net, ifname);
+ else if (tb[IFLA_GROUP])
+ return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
else
return -EINVAL;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [Patch net-next v2] net: allow to delete a whole device group
2015-03-24 18:53 [Patch net-next v2] net: allow to delete a whole device group Cong Wang
@ 2015-03-24 19:41 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2015-03-24 19:41 UTC (permalink / raw)
To: xiyou.wangcong; +Cc: netdev, stephen
From: Cong Wang <xiyou.wangcong@gmail.com>
Date: Tue, 24 Mar 2015 11:53:31 -0700
> With dev group, we can change a batch of net devices,
> so we should allow to delete them together too.
>
> Group 0 is not allowed to be deleted since it is
> the default group.
>
> Cc: Stephen Hemminger <stephen@networkplumber.org>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Applied.
^ permalink raw reply [flat|nested] 2+ messages in thread
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