From: Xiao Liang shaw.leon@gmail.com
[ Upstream commit db014522f35606031d8ac58b4aed6b1ed84f03d1 ]
Currently some IPv6 tunnel drivers set tnl->net to dev_net(dev) in ndo_init(), which is called in register_netdevice(). However, it lacks the context of link-netns when we enable cross-net tunnels at device registration time.
Let's move the init of tunnel link-netns before register_netdevice().
ip6_gre has already initialized netns, so just remove the redundant assignment.
Signed-off-by: Xiao Liang shaw.leon@gmail.com Reviewed-by: Kuniyuki Iwashima kuniyu@amazon.com Link: https://patch.msgid.link/20250219125039.18024-8-shaw.leon@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv6/ip6_gre.c | 2 -- net/ipv6/ip6_tunnel.c | 3 ++- net/ipv6/ip6_vti.c | 3 ++- net/ipv6/sit.c | 8 +++++--- 4 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 235808cfec705..68e9a41eed491 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -1498,7 +1498,6 @@ static int ip6gre_tunnel_init_common(struct net_device *dev) tunnel = netdev_priv(dev);
tunnel->dev = dev; - tunnel->net = dev_net(dev); strcpy(tunnel->parms.name, dev->name);
ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); @@ -1882,7 +1881,6 @@ static int ip6erspan_tap_init(struct net_device *dev) tunnel = netdev_priv(dev);
tunnel->dev = dev; - tunnel->net = dev_net(dev); strcpy(tunnel->parms.name, dev->name);
ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 48fd53b989726..5350c9bb2319b 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1878,7 +1878,6 @@ ip6_tnl_dev_init_gen(struct net_device *dev) int t_hlen;
t->dev = dev; - t->net = dev_net(dev);
ret = dst_cache_init(&t->dst_cache, GFP_KERNEL); if (ret) @@ -1940,6 +1939,7 @@ static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev) struct net *net = dev_net(dev); struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ t->net = net; t->parms.proto = IPPROTO_IPV6;
rcu_assign_pointer(ip6n->tnls_wc[0], t); @@ -2013,6 +2013,7 @@ static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev, int err;
nt = netdev_priv(dev); + nt->net = net;
if (ip_tunnel_netlink_encap_parms(data, &ipencap)) { err = ip6_tnl_encap_setup(nt, &ipencap); diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 590737c275379..0123504691443 100644 --- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -925,7 +925,6 @@ static inline int vti6_dev_init_gen(struct net_device *dev) struct ip6_tnl *t = netdev_priv(dev);
t->dev = dev; - t->net = dev_net(dev); netdev_hold(dev, &t->dev_tracker, GFP_KERNEL); netdev_lockdep_set_classes(dev); return 0; @@ -958,6 +957,7 @@ static int __net_init vti6_fb_tnl_dev_init(struct net_device *dev) struct net *net = dev_net(dev); struct vti6_net *ip6n = net_generic(net, vti6_net_id);
+ t->net = net; t->parms.proto = IPPROTO_IPV6;
rcu_assign_pointer(ip6n->tnls_wc[0], t); @@ -1008,6 +1008,7 @@ static int vti6_newlink(struct net *src_net, struct net_device *dev, vti6_netlink_parms(data, &nt->parms);
nt->parms.proto = IPPROTO_IPV6; + nt->net = net;
if (vti6_locate(net, &nt->parms, 0)) return -EEXIST; diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 39bd8951bfca1..3c15a0ae228e2 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -269,6 +269,7 @@ static struct ip_tunnel *ipip6_tunnel_locate(struct net *net,
nt = netdev_priv(dev);
+ nt->net = net; nt->parms = *parms; if (ipip6_tunnel_create(dev) < 0) goto failed_free; @@ -1449,7 +1450,6 @@ static int ipip6_tunnel_init(struct net_device *dev) int err;
tunnel->dev = dev; - tunnel->net = dev_net(dev); strcpy(tunnel->parms.name, dev->name);
ipip6_tunnel_bind_dev(dev); @@ -1563,6 +1563,7 @@ static int ipip6_newlink(struct net *src_net, struct net_device *dev, int err;
nt = netdev_priv(dev); + nt->net = net;
if (ip_tunnel_netlink_encap_parms(data, &ipencap)) { err = ip_tunnel_encap_setup(nt, &ipencap); @@ -1858,6 +1859,9 @@ static int __net_init sit_init_net(struct net *net) */ sitn->fb_tunnel_dev->netns_local = true;
+ t = netdev_priv(sitn->fb_tunnel_dev); + t->net = net; + err = register_netdev(sitn->fb_tunnel_dev); if (err) goto err_reg_dev; @@ -1865,8 +1869,6 @@ static int __net_init sit_init_net(struct net *net) ipip6_tunnel_clone_6rd(sitn->fb_tunnel_dev, sitn); ipip6_fb_tunnel_init(sitn->fb_tunnel_dev);
- t = netdev_priv(sitn->fb_tunnel_dev); - strcpy(t->parms.name, sitn->fb_tunnel_dev->name); return 0;