提交 7b4ce694 编写于 作者: N Nicolas Dichtel 提交者: David S. Miller

rtnetlink: pass link_net to the newlink handler

When IFLA_LINK_NETNSID is used, the netdevice should be built in this link netns
and moved at the end to another netns (pointed by the socket netns or
IFLA_NET_NS_[PID|FD]).

Existing user of the newlink handler will use the netns argument (src_net) to
find a link netdevice or to check some other information into the link netns.
For example, to find a netdevice, two information are required: an ifindex
(usually from IFLA_LINK) and a netns (this link netns).

Note: when using IFLA_LINK_NETNSID and IFLA_NET_NS_[PID|FD], a user may create a
netdevice that stands in netnsX and with its link part in netnsY, by sending a
rtnl message from netnsZ.
Signed-off-by: NNicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 86b3bfe9
......@@ -2148,7 +2148,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
dev->ifindex = ifm->ifi_index;
if (ops->newlink) {
err = ops->newlink(net, dev, tb, data);
err = ops->newlink(link_net ? : net, dev, tb, data);
/* Drivers should call free_netdev() in ->destructor
* and unregister it on failure after registration
* so that device could be finally freed in rtnl_unlock.
......
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