From: Nicolas Dichtel Date: Tue, 27 Jan 2015 10:13:08 +0000 (+0100) Subject: rtnetlink: pass link_net to the newlink handler X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b4ce694b2030e7bb41f938cba6a0be4947a5aa5;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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: Nicolas Dichtel Signed-off-by: David S. Miller --- diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 07447d1665e6..fedd7ab4085a 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2148,7 +2148,7 @@ replay: 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.