netdev - [PATCH net-next v6 07/11] net: xfrm: Use link netns in newlink() of rtnl_link

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Message-ID: <20241218130909.2173-8-shaw.leon@gmail.com>
Date: Wed, 18 Dec 2024 21:09:05 +0800
From: Xiao Liang <shaw.leon@...il.com>
To: netdev@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Kuniyuki Iwashima <kuniyu@...zon.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Donald Hunter <donald.hunter@...il.com>,
	Paolo Abeni <pabeni@...hat.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Ido Schimmel <idosch@...dia.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Simon Horman <horms@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	Jiri Pirko <jiri@...nulli.us>,
	Hangbin Liu <liuhangbin@...il.com>,
	linux-rdma@...r.kernel.org,
	linux-can@...r.kernel.org,
	osmocom-net-gprs@...ts.osmocom.org,
	bpf@...r.kernel.org,
	linux-ppp@...r.kernel.org,
	wireguard@...ts.zx2c4.com,
	linux-wireless@...r.kernel.org,
	b.a.t.m.a.n@...ts.open-mesh.org,
	bridge@...ts.linux.dev,
	linux-wpan@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v6 07/11] net: xfrm: Use link netns in newlink() of rtnl_link_ops

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 <shaw.leon@...il.com>
---
 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