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-rw-r--r--include/net/ip_tunnels.h1
-rw-r--r--net/ipv4/ip_tunnel.c10
-rw-r--r--net/ipv6/sit.c42
3 files changed, 42 insertions, 11 deletions
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index b0d982471a5c..781b3cf86a2f 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -42,6 +42,7 @@ struct ip_tunnel {
struct ip_tunnel __rcu *next;
struct hlist_node hash_node;
struct net_device *dev;
+ struct net *net; /* netns for packet i/o */
int err_count; /* Number of arrived ICMP errors */
unsigned long err_time; /* Time when the last ICMP error
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 3b00d81c8f1e..394cebc96d22 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -304,6 +304,7 @@ static struct net_device *__ip_tunnel_create(struct net *net,
tunnel = netdev_priv(dev);
tunnel->parms = *parms;
+ tunnel->net = net;
err = register_netdevice(dev);
if (err)
@@ -453,6 +454,9 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
tstats->rx_bytes += skb->len;
u64_stats_update_end(&tstats->syncp);
+ if (tunnel->net != dev_net(tunnel->dev))
+ skb_scrub_packet(skb);
+
if (tunnel->dev->type == ARPHRD_ETHER) {
skb->protocol = eth_type_trans(skb, tunnel->dev);
skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
@@ -541,7 +545,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
tos = ipv6_get_dsfield((const struct ipv6hdr *)inner_iph);
}
- rt = ip_route_output_tunnel(dev_net(dev), &fl4,
+ rt = ip_route_output_tunnel(tunnel->net, &fl4,
protocol,
dst, tnl_params->saddr,
tunnel->parms.o_key,
@@ -602,6 +606,9 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
}
#endif
+ if (tunnel->net != dev_net(dev))
+ skb_scrub_packet(skb);
+
if (tunnel->err_count > 0) {
if (time_before(jiffies,
tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
@@ -888,6 +895,7 @@ int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
if (ip_tunnel_find(itn, p, dev->type))
return -EEXIST;
+ nt->net = net;
nt->parms = *p;
err = register_netdevice(dev);
if (err)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index f639866b3dcf..97a0bfe2c293 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -466,14 +466,14 @@ isatap_chksrc(struct sk_buff *skb, const struct iphdr *iph, struct ip_tunnel *t)
static void ipip6_tunnel_uninit(struct net_device *dev)
{
- struct net *net = dev_net(dev);
- struct sit_net *sitn = net_generic(net, sit_net_id);
+ struct ip_tunnel *tunnel = netdev_priv(dev);
+ struct sit_net *sitn = net_generic(tunnel->net, sit_net_id);
if (dev == sitn->fb_tunnel_dev) {
RCU_INIT_POINTER(sitn->tunnels_wc[0], NULL);
} else {
- ipip6_tunnel_unlink(sitn, netdev_priv(dev));
- ipip6_tunnel_del_prl(netdev_priv(dev), NULL);
+ ipip6_tunnel_unlink(sitn, tunnel);
+ ipip6_tunnel_del_prl(tunnel, NULL);
}
dev_put(dev);
}
@@ -621,6 +621,8 @@ static int ipip6_rcv(struct sk_buff *skb)
tstats->rx_packets++;
tstats->rx_bytes += skb->len;
+ if (tunnel->net != dev_net(tunnel->dev))
+ skb_scrub_packet(skb);
netif_rx(skb);
return 0;
@@ -803,7 +805,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
goto tx_error;
}
- rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
+ rt = ip_route_output_ports(tunnel->net, &fl4, NULL,
dst, tiph->saddr,
0, 0,
IPPROTO_IPV6, RT_TOS(tos),
@@ -858,6 +860,9 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
tunnel->err_count = 0;
}
+ if (tunnel->net != dev_net(dev))
+ skb_scrub_packet(skb);
+
/*
* Okay, now see if we can stuff it in the buffer as-is.
*/
@@ -944,7 +949,8 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
iph = &tunnel->parms.iph;
if (iph->daddr) {
- struct rtable *rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
+ struct rtable *rt = ip_route_output_ports(tunnel->net, &fl4,
+ NULL,
iph->daddr, iph->saddr,
0, 0,
IPPROTO_IPV6,
@@ -959,7 +965,7 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
}
if (!tdev && tunnel->parms.link)
- tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link);
+ tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link);
if (tdev) {
dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr);
@@ -972,7 +978,7 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
static void ipip6_tunnel_update(struct ip_tunnel *t, struct ip_tunnel_parm *p)
{
- struct net *net = dev_net(t->dev);
+ struct net *net = t->net;
struct sit_net *sitn = net_generic(net, sit_net_id);
ipip6_tunnel_unlink(sitn, t);
@@ -1248,7 +1254,6 @@ static void ipip6_tunnel_setup(struct net_device *dev)
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
dev->iflink = 0;
dev->addr_len = 4;
- dev->features |= NETIF_F_NETNS_LOCAL;
dev->features |= NETIF_F_LLTX;
}
@@ -1257,6 +1262,7 @@ static int ipip6_tunnel_init(struct net_device *dev)
struct ip_tunnel *tunnel = netdev_priv(dev);
tunnel->dev = dev;
+ tunnel->net = dev_net(dev);
memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
@@ -1277,6 +1283,7 @@ static int __net_init ipip6_fb_tunnel_init(struct net_device *dev)
struct sit_net *sitn = net_generic(net, sit_net_id);
tunnel->dev = dev;
+ tunnel->net = dev_net(dev);
strcpy(tunnel->parms.name, dev->name);
iph->version = 4;
@@ -1564,8 +1571,14 @@ static struct xfrm_tunnel ipip_handler __read_mostly = {
static void __net_exit sit_destroy_tunnels(struct sit_net *sitn, struct list_head *head)
{
+ struct net *net = dev_net(sitn->fb_tunnel_dev);
+ struct net_device *dev, *aux;
int prio;
+ for_each_netdev_safe(net, dev, aux)
+ if (dev->rtnl_link_ops == &sit_link_ops)
+ unregister_netdevice_queue(dev, head);
+
for (prio = 1; prio < 4; prio++) {
int h;
for (h = 0; h < HASH_SIZE; h++) {
@@ -1573,7 +1586,12 @@ static void __net_exit sit_destroy_tunnels(struct sit_net *sitn, struct list_hea
t = rtnl_dereference(sitn->tunnels[prio][h]);
while (t != NULL) {
- unregister_netdevice_queue(t->dev, head);
+ /* If dev is in the same netns, it has already
+ * been added to the list by the previous loop.
+ */
+ if (dev_net(t->dev) != net)
+ unregister_netdevice_queue(t->dev,
+ head);
t = rtnl_dereference(t->next);
}
}
@@ -1598,6 +1616,10 @@ static int __net_init sit_init_net(struct net *net)
goto err_alloc_dev;
}
dev_net_set(sitn->fb_tunnel_dev, net);
+ /* FB netdevice is special: we have one, and only one per netns.
+ * Allowing to move it to another netns is clearly unsafe.
+ */
+ sitn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL;
err = ipip6_fb_tunnel_init(sitn->fb_tunnel_dev);
if (err)
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-22 22:13:55 +0300