From: Theuns Verwoerd Date: Mon, 30 Jan 2017 23:23:46 +0000 (+1300) Subject: rtnetlink: Handle IFLA_MASTER parameter when processing rtnl_newlink X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=160ca0142431c19386db976302fd4b07c587f651;p=openwrt%2Fstaging%2Fblogic.git rtnetlink: Handle IFLA_MASTER parameter when processing rtnl_newlink Allow a master interface to be specified as one of the parameters when creating a new interface via rtnl_newlink. Previously this would require invoking interface creation, waiting for it to complete, and then separately binding that new interface to a master. In particular, this is used when creating a macvlan child interface for VRRP in a VRF configuration, allowing the interface creator to specify directly what master interface should be inherited by the child, without having to deal with asynchronous complications and potential race conditions. Signed-off-by: Theuns Verwoerd Acked-by: David Ahern Signed-off-by: David S. Miller --- diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 152744643074..adfb54b896da 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2570,7 +2570,7 @@ replay: return -ENODEV; } - if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) + if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) return -EOPNOTSUPP; if (!ops) { @@ -2652,6 +2652,11 @@ replay: if (err < 0) goto out_unregister; } + if (tb[IFLA_MASTER]) { + err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); + if (err) + goto out_unregister; + } out: if (link_net) put_net(link_net);