Subject: [PATCH net-next v7 07/11] net: xfrm: Use link netns in newlink() of rtnl_link_ops

From: Xiao Liang <[email-masked]>
Date: Sat, 4 Jan 2025 20:57:28 +0800

When link_net is set, use it as link netns instead of dev_net(). This
prepares for rtnetlink core to create device in target netns directly,
in which case the two namespaces may be different.

Signed-off-by: Xiao Liang <[email-masked]>
---
 net/xfrm/xfrm_interface_core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/xfrm/xfrm_interface_core.c b/net/xfrm/xfrm_interface_core.c
index 77d50d4af4a1..d1198c63dd23 100644
--- a/net/xfrm/xfrm_interface_core.c
+++ b/net/xfrm/xfrm_interface_core.c
@@ -242,10 +242,9 @@ static void xfrmi_dev_free(struct net_device *dev)
 	gro_cells_destroy(&xi->gro_cells);
 }
 
-static int xfrmi_create(struct net_device *dev)
+static int xfrmi_create(struct net *net, struct net_device *dev)
 {
 	struct xfrm_if *xi = netdev_priv(dev);
-	struct net *net = dev_net(dev);
 	struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
 	int err;
 
@@ -819,11 +818,12 @@ static int xfrmi_newlink(struct rtnl_newlink_params *params)
 	struct netlink_ext_ack *extack = params->extack;
 	struct net_device *dev = params->dev;
 	struct nlattr **data = params->data;
-	struct net *net = dev_net(dev);
 	struct xfrm_if_parms p = {};
 	struct xfrm_if *xi;
+	struct net *net;
 	int err;
 
+	net = params->link_net ? : dev_net(dev);
 	xfrmi_netlink_parms(data, &p);
 	if (p.collect_md) {
 		struct xfrmi_net *xfrmn = net_generic(net, xfrmi_net_id);
@@ -852,7 +852,7 @@ static int xfrmi_newlink(struct rtnl_newlink_params *params)
 	xi->net = net;
 	xi->dev = dev;
 
-	err = xfrmi_create(dev);
+	err = xfrmi_create(net, dev);
 	return err;
 }
 
-- 
2.47.1