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path: root/net/ipv6/ip6_tunnel.c
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Diffstat (limited to 'net/ipv6/ip6_tunnel.c')
-rw-r--r--net/ipv6/ip6_tunnel.c84
1 files changed, 54 insertions, 30 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 61355f7f4da..afa08245836 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -29,7 +29,6 @@
#include <linux/if.h>
#include <linux/in.h>
#include <linux/ip.h>
-#include <linux/if_tunnel.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
@@ -62,6 +61,7 @@
MODULE_AUTHOR("Ville Nuorvala");
MODULE_DESCRIPTION("IPv6 tunneling device");
MODULE_LICENSE("GPL");
+MODULE_ALIAS_RTNL_LINK("ip6tnl");
MODULE_ALIAS_NETDEV("ip6tnl0");
#ifdef IP6_TNL_DEBUG
@@ -70,9 +70,6 @@ MODULE_ALIAS_NETDEV("ip6tnl0");
#define IP6_TNL_TRACE(x...) do {;} while(0)
#endif
-#define IPV6_TCLASS_MASK (IPV6_FLOWINFO_MASK & ~IPV6_FLOWLABEL_MASK)
-#define IPV6_TCLASS_SHIFT 20
-
#define HASH_SIZE_SHIFT 5
#define HASH_SIZE (1 << HASH_SIZE_SHIFT)
@@ -103,16 +100,26 @@ struct ip6_tnl_net {
static struct net_device_stats *ip6_get_stats(struct net_device *dev)
{
- struct pcpu_tstats sum = { 0 };
+ struct pcpu_sw_netstats tmp, sum = { 0 };
int i;
for_each_possible_cpu(i) {
- const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i);
-
- sum.rx_packets += tstats->rx_packets;
- sum.rx_bytes += tstats->rx_bytes;
- sum.tx_packets += tstats->tx_packets;
- sum.tx_bytes += tstats->tx_bytes;
+ unsigned int start;
+ const struct pcpu_sw_netstats *tstats =
+ per_cpu_ptr(dev->tstats, i);
+
+ do {
+ start = u64_stats_fetch_begin_irq(&tstats->syncp);
+ tmp.rx_packets = tstats->rx_packets;
+ tmp.rx_bytes = tstats->rx_bytes;
+ tmp.tx_packets = tstats->tx_packets;
+ tmp.tx_bytes = tstats->tx_bytes;
+ } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
+
+ sum.rx_packets += tmp.rx_packets;
+ sum.rx_bytes += tmp.rx_bytes;
+ sum.tx_packets += tmp.tx_packets;
+ sum.tx_bytes += tmp.tx_bytes;
}
dev->stats.rx_packets = sum.rx_packets;
dev->stats.rx_bytes = sum.rx_bytes;
@@ -785,7 +792,7 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr,
&ipv6h->daddr)) != NULL) {
- struct pcpu_tstats *tstats;
+ struct pcpu_sw_netstats *tstats;
if (t->parms.proto != ipproto && t->parms.proto != 0) {
rcu_read_unlock();
@@ -824,8 +831,10 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
}
tstats = this_cpu_ptr(t->dev->tstats);
+ u64_stats_update_begin(&tstats->syncp);
tstats->rx_packets++;
tstats->rx_bytes += skb->len;
+ u64_stats_update_end(&tstats->syncp);
netif_rx(skb);
@@ -1131,7 +1140,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
- fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
+ fl6.flowlabel |= ip6_flowlabel(ipv6h);
if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
fl6.flowi6_mark = skb->mark;
@@ -1332,8 +1341,8 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
int err = 0;
struct ip6_tnl_parm p;
struct __ip6_tnl_parm p1;
- struct ip6_tnl *t = NULL;
- struct net *net = dev_net(dev);
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct net *net = t->net;
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
switch (cmd) {
@@ -1345,11 +1354,11 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
}
ip6_tnl_parm_from_user(&p1, &p);
t = ip6_tnl_locate(net, &p1, 0);
+ if (t == NULL)
+ t = netdev_priv(dev);
} else {
memset(&p, 0, sizeof(p));
}
- if (t == NULL)
- t = netdev_priv(dev);
ip6_tnl_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
err = -EFAULT;
@@ -1430,9 +1439,17 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
static int
ip6_tnl_change_mtu(struct net_device *dev, int new_mtu)
{
- if (new_mtu < IPV6_MIN_MTU) {
- return -EINVAL;
+ struct ip6_tnl *tnl = netdev_priv(dev);
+
+ if (tnl->parms.proto == IPPROTO_IPIP) {
+ if (new_mtu < 68)
+ return -EINVAL;
+ } else {
+ if (new_mtu < IPV6_MIN_MTU)
+ return -EINVAL;
}
+ if (new_mtu > 0xFFF8 - dev->hard_header_len)
+ return -EINVAL;
dev->mtu = new_mtu;
return 0;
}
@@ -1489,7 +1506,7 @@ ip6_tnl_dev_init_gen(struct net_device *dev)
t->dev = dev;
t->net = dev_net(dev);
- dev->tstats = alloc_percpu(struct pcpu_tstats);
+ dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!dev->tstats)
return -ENOMEM;
return 0;
@@ -1541,7 +1558,7 @@ static int ip6_tnl_validate(struct nlattr *tb[], struct nlattr *data[])
{
u8 proto;
- if (!data)
+ if (!data || !data[IFLA_IPTUN_PROTO])
return 0;
proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);
@@ -1627,6 +1644,15 @@ static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[],
return ip6_tnl_update(t, &p);
}
+static void ip6_tnl_dellink(struct net_device *dev, struct list_head *head)
+{
+ struct net *net = dev_net(dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+
+ if (dev != ip6n->fb_tnl_dev)
+ unregister_netdevice_queue(dev, head);
+}
+
static size_t ip6_tnl_get_size(const struct net_device *dev)
{
return
@@ -1656,9 +1682,9 @@ static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev)
if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) ||
nla_put(skb, IFLA_IPTUN_LOCAL, sizeof(struct in6_addr),
- &parm->raddr) ||
- nla_put(skb, IFLA_IPTUN_REMOTE, sizeof(struct in6_addr),
&parm->laddr) ||
+ nla_put(skb, IFLA_IPTUN_REMOTE, sizeof(struct in6_addr),
+ &parm->raddr) ||
nla_put_u8(skb, IFLA_IPTUN_TTL, parm->hop_limit) ||
nla_put_u8(skb, IFLA_IPTUN_ENCAP_LIMIT, parm->encap_limit) ||
nla_put_be32(skb, IFLA_IPTUN_FLOWINFO, parm->flowinfo) ||
@@ -1691,6 +1717,7 @@ static struct rtnl_link_ops ip6_link_ops __read_mostly = {
.validate = ip6_tnl_validate,
.newlink = ip6_tnl_newlink,
.changelink = ip6_tnl_changelink,
+ .dellink = ip6_tnl_dellink,
.get_size = ip6_tnl_get_size,
.fill_info = ip6_tnl_fill_info,
};
@@ -1707,9 +1734,9 @@ static struct xfrm6_tunnel ip6ip6_handler __read_mostly = {
.priority = 1,
};
-static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
+static void __net_exit ip6_tnl_destroy_tunnels(struct net *net)
{
- struct net *net = dev_net(ip6n->fb_tnl_dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
struct net_device *dev, *aux;
int h;
struct ip6_tnl *t;
@@ -1731,8 +1758,6 @@ static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
}
}
- t = rtnl_dereference(ip6n->tnls_wc[0]);
- unregister_netdevice_queue(t->dev, &list);
unregister_netdevice_many(&list);
}
@@ -1752,6 +1777,7 @@ static int __net_init ip6_tnl_init_net(struct net *net)
if (!ip6n->fb_tnl_dev)
goto err_alloc_dev;
dev_net_set(ip6n->fb_tnl_dev, net);
+ ip6n->fb_tnl_dev->rtnl_link_ops = &ip6_link_ops;
/* FB netdevice is special: we have one, and only one per netns.
* Allowing to move it to another netns is clearly unsafe.
*/
@@ -1778,10 +1804,8 @@ err_alloc_dev:
static void __net_exit ip6_tnl_exit_net(struct net *net)
{
- struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
-
rtnl_lock();
- ip6_tnl_destroy_tunnels(ip6n);
+ ip6_tnl_destroy_tunnels(net);
rtnl_unlock();
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 13:51:22 +0000