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([103.167.140.11]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-220d536436fsm103427175ad.64.2025.02.19.04.51.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Feb 2025 04:51:56 -0800 (PST) From: Xiao Liang To: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, Kuniyuki Iwashima , Jakub Kicinski Cc: "David S. Miller" , David Ahern , Eric Dumazet , Paolo Abeni , Andrew Lunn , Simon Horman , Shuah Khan , Donald Hunter , Alexander Aring , Stefan Schmidt , Miquel Raynal , Steffen Klassert , Herbert Xu , linux-rdma@vger.kernel.org, linux-can@vger.kernel.org, osmocom-net-gprs@lists.osmocom.org, bpf@vger.kernel.org, linux-ppp@vger.kernel.org, wireguard@lists.zx2c4.com, linux-wireless@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org, bridge@lists.linux.dev, linux-wpan@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v10 07/13] net: ipv6: Init tunnel link-netns before registering dev Date: Wed, 19 Feb 2025 20:50:33 +0800 Message-ID: <20250219125039.18024-8-shaw.leon@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250219125039.18024-1-shaw.leon@gmail.com> References: <20250219125039.18024-1-shaw.leon@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Kuniyuki Iwashima --- 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 863852abe8ea..d9e6b1fd9917 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_devic= e *dev) tunnel =3D netdev_priv(dev); =20 tunnel->dev =3D dev; - tunnel->net =3D dev_net(dev); strcpy(tunnel->parms.name, dev->name); =20 ret =3D dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); @@ -1882,7 +1881,6 @@ static int ip6erspan_tap_init(struct net_device *dev) tunnel =3D netdev_priv(dev); =20 tunnel->dev =3D dev; - tunnel->net =3D dev_net(dev); strcpy(tunnel->parms.name, dev->name); =20 ret =3D dst_cache_init(&tunnel->dst_cache, GFP_KERNEL); diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 54b843d20870..111a8777c2f7 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; =20 t->dev =3D dev; - t->net =3D dev_net(dev); =20 ret =3D 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 =3D dev_net(dev); struct ip6_tnl_net *ip6n =3D net_generic(net, ip6_tnl_net_id); =20 + t->net =3D net; t->parms.proto =3D IPPROTO_IPV6; =20 rcu_assign_pointer(ip6n->tnls_wc[0], t); @@ -2015,6 +2015,7 @@ static int ip6_tnl_newlink(struct net_device *dev, int err; =20 nt =3D netdev_priv(dev); + nt->net =3D net; =20 if (ip_tunnel_netlink_encap_parms(data, &ipencap)) { err =3D ip6_tnl_encap_setup(nt, &ipencap); diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 993f85aeb882..16e0d74f99dd 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 =3D netdev_priv(dev); =20 t->dev =3D dev; - t->net =3D 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_d= evice *dev) struct net *net =3D dev_net(dev); struct vti6_net *ip6n =3D net_generic(net, vti6_net_id); =20 + t->net =3D net; t->parms.proto =3D IPPROTO_IPV6; =20 rcu_assign_pointer(ip6n->tnls_wc[0], t); @@ -1009,6 +1009,7 @@ static int vti6_newlink(struct net_device *dev, vti6_netlink_parms(data, &nt->parms); =20 nt->parms.proto =3D IPPROTO_IPV6; + nt->net =3D net; =20 if (vti6_locate(net, &nt->parms, 0)) return -EEXIST; diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index e2bd52cabdee..20453671ac50 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, =20 nt =3D netdev_priv(dev); =20 + nt->net =3D net; nt->parms =3D *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; =20 tunnel->dev =3D dev; - tunnel->net =3D dev_net(dev); strcpy(tunnel->parms.name, dev->name); =20 ipip6_tunnel_bind_dev(dev); @@ -1565,6 +1565,7 @@ static int ipip6_newlink(struct net_device *dev, int err; =20 nt =3D netdev_priv(dev); + nt->net =3D net; =20 if (ip_tunnel_netlink_encap_parms(data, &ipencap)) { err =3D ip_tunnel_encap_setup(nt, &ipencap); @@ -1860,6 +1861,9 @@ static int __net_init sit_init_net(struct net *net) */ sitn->fb_tunnel_dev->netns_local =3D true; =20 + t =3D netdev_priv(sitn->fb_tunnel_dev); + t->net =3D net; + err =3D register_netdev(sitn->fb_tunnel_dev); if (err) goto err_reg_dev; @@ -1867,8 +1871,6 @@ 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); =20 - t =3D netdev_priv(sitn->fb_tunnel_dev); - strcpy(t->parms.name, sitn->fb_tunnel_dev->name); return 0; =20 --=20 2.48.1