* Ville Nuorvala <vnuorval@tcs.hut.fi>
* Yasuyuki Kozakai <kozakai@linux-ipv6.org>
*
- * $Id$
- *
* Based on:
* linux/net/ipv6/sit.c and linux/net/ipv4/ipip.c
*
#include <net/xfrm.h>
#include <net/dsfield.h>
#include <net/inet_ecn.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
MODULE_AUTHOR("Ville Nuorvala");
MODULE_DESCRIPTION("IPv6 tunneling device");
#define IPV6_TLV_TEL_DST_SIZE 8
#ifdef IP6_TNL_DEBUG
-#define IP6_TNL_TRACE(x...) printk(KERN_DEBUG "%s:" x "\n", __FUNCTION__)
+#define IP6_TNL_TRACE(x...) printk(KERN_DEBUG "%s:" x "\n", __func__)
#else
#define IP6_TNL_TRACE(x...) do {;} while(0)
#endif
(addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \
(HASH_SIZE - 1))
-static int ip6_fb_tnl_dev_init(struct net_device *dev);
-static int ip6_tnl_dev_init(struct net_device *dev);
+static void ip6_tnl_dev_init(struct net_device *dev);
static void ip6_tnl_dev_setup(struct net_device *dev);
-/* the IPv6 tunnel fallback device */
-static struct net_device *ip6_fb_tnl_dev;
-
-
-/* lists for storing tunnels in use */
-static struct ip6_tnl *tnls_r_l[HASH_SIZE];
-static struct ip6_tnl *tnls_wc[1];
-static struct ip6_tnl **tnls[2] = { tnls_wc, tnls_r_l };
+static int ip6_tnl_net_id __read_mostly;
+struct ip6_tnl_net {
+ /* the IPv6 tunnel fallback device */
+ struct net_device *fb_tnl_dev;
+ /* lists for storing tunnels in use */
+ struct ip6_tnl *tnls_r_l[HASH_SIZE];
+ struct ip6_tnl *tnls_wc[1];
+ struct ip6_tnl **tnls[2];
+};
-/* lock for the tunnel lists */
-static DEFINE_RWLOCK(ip6_tnl_lock);
+/*
+ * Locking : hash tables are protected by RCU and a spinlock
+ */
+static DEFINE_SPINLOCK(ip6_tnl_lock);
static inline struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t)
{
* else %NULL
**/
+#define for_each_ip6_tunnel_rcu(start) \
+ for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
+
static struct ip6_tnl *
-ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
+ip6_tnl_lookup(struct net *net, struct in6_addr *remote, struct in6_addr *local)
{
unsigned h0 = HASH(remote);
unsigned h1 = HASH(local);
struct ip6_tnl *t;
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
- for (t = tnls_r_l[h0 ^ h1]; t; t = t->next) {
+ for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[h0 ^ h1]) {
if (ipv6_addr_equal(local, &t->parms.laddr) &&
ipv6_addr_equal(remote, &t->parms.raddr) &&
(t->dev->flags & IFF_UP))
return t;
}
- if ((t = tnls_wc[0]) != NULL && (t->dev->flags & IFF_UP))
+ t = rcu_dereference(ip6n->tnls_wc[0]);
+ if (t && (t->dev->flags & IFF_UP))
return t;
return NULL;
**/
static struct ip6_tnl **
-ip6_tnl_bucket(struct ip6_tnl_parm *p)
+ip6_tnl_bucket(struct ip6_tnl_net *ip6n, struct ip6_tnl_parm *p)
{
struct in6_addr *remote = &p->raddr;
struct in6_addr *local = &p->laddr;
prio = 1;
h = HASH(remote) ^ HASH(local);
}
- return &tnls[prio][h];
+ return &ip6n->tnls[prio][h];
}
/**
**/
static void
-ip6_tnl_link(struct ip6_tnl *t)
+ip6_tnl_link(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
{
- struct ip6_tnl **tp = ip6_tnl_bucket(&t->parms);
+ struct ip6_tnl **tp = ip6_tnl_bucket(ip6n, &t->parms);
+ spin_lock_bh(&ip6_tnl_lock);
t->next = *tp;
- write_lock_bh(&ip6_tnl_lock);
- *tp = t;
- write_unlock_bh(&ip6_tnl_lock);
+ rcu_assign_pointer(*tp, t);
+ spin_unlock_bh(&ip6_tnl_lock);
}
/**
**/
static void
-ip6_tnl_unlink(struct ip6_tnl *t)
+ip6_tnl_unlink(struct ip6_tnl_net *ip6n, struct ip6_tnl *t)
{
struct ip6_tnl **tp;
- for (tp = ip6_tnl_bucket(&t->parms); *tp; tp = &(*tp)->next) {
+ for (tp = ip6_tnl_bucket(ip6n, &t->parms); *tp; tp = &(*tp)->next) {
if (t == *tp) {
- write_lock_bh(&ip6_tnl_lock);
+ spin_lock_bh(&ip6_tnl_lock);
*tp = t->next;
- write_unlock_bh(&ip6_tnl_lock);
+ spin_unlock_bh(&ip6_tnl_lock);
break;
}
}
* created tunnel or NULL
**/
-static struct ip6_tnl *ip6_tnl_create(struct ip6_tnl_parm *p)
+static struct ip6_tnl *ip6_tnl_create(struct net *net, struct ip6_tnl_parm *p)
{
struct net_device *dev;
struct ip6_tnl *t;
char name[IFNAMSIZ];
int err;
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
if (p->name[0])
strlcpy(name, p->name, IFNAMSIZ);
if (dev == NULL)
goto failed;
+ dev_net_set(dev, net);
+
if (strchr(name, '%')) {
if (dev_alloc_name(dev, name) < 0)
goto failed_free;
}
t = netdev_priv(dev);
- dev->init = ip6_tnl_dev_init;
t->parms = *p;
+ ip6_tnl_dev_init(dev);
if ((err = register_netdevice(dev)) < 0)
goto failed_free;
dev_hold(dev);
- ip6_tnl_link(t);
+ ip6_tnl_link(ip6n, t);
return t;
failed_free:
* matching tunnel or NULL
**/
-static struct ip6_tnl *ip6_tnl_locate(struct ip6_tnl_parm *p, int create)
+static struct ip6_tnl *ip6_tnl_locate(struct net *net,
+ struct ip6_tnl_parm *p, int create)
{
struct in6_addr *remote = &p->raddr;
struct in6_addr *local = &p->laddr;
struct ip6_tnl *t;
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
- for (t = *ip6_tnl_bucket(p); t; t = t->next) {
+ for (t = *ip6_tnl_bucket(ip6n, p); t; t = t->next) {
if (ipv6_addr_equal(local, &t->parms.laddr) &&
ipv6_addr_equal(remote, &t->parms.raddr))
return t;
}
if (!create)
return NULL;
- return ip6_tnl_create(p);
+ return ip6_tnl_create(net, p);
}
/**
ip6_tnl_dev_uninit(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
+ struct net *net = dev_net(dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
- if (dev == ip6_fb_tnl_dev) {
- write_lock_bh(&ip6_tnl_lock);
- tnls_wc[0] = NULL;
- write_unlock_bh(&ip6_tnl_lock);
+ if (dev == ip6n->fb_tnl_dev) {
+ spin_lock_bh(&ip6_tnl_lock);
+ ip6n->tnls_wc[0] = NULL;
+ spin_unlock_bh(&ip6_tnl_lock);
} else {
- ip6_tnl_unlink(t);
+ ip6_tnl_unlink(ip6n, t);
}
ip6_tnl_dst_reset(t);
dev_put(dev);
static int
ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
- int *type, int *code, int *msg, __u32 *info, int offset)
+ u8 *type, u8 *code, int *msg, __u32 *info, int offset)
{
struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data;
struct ip6_tnl *t;
int rel_msg = 0;
- int rel_type = ICMPV6_DEST_UNREACH;
- int rel_code = ICMPV6_ADDR_UNREACH;
+ u8 rel_type = ICMPV6_DEST_UNREACH;
+ u8 rel_code = ICMPV6_ADDR_UNREACH;
__u32 rel_info = 0;
__u16 len;
int err = -ENOENT;
in trouble since we might need the source address for further
processing of the error. */
- read_lock(&ip6_tnl_lock);
- if ((t = ip6_tnl_lookup(&ipv6h->daddr, &ipv6h->saddr)) == NULL)
+ rcu_read_lock();
+ if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->daddr,
+ &ipv6h->saddr)) == NULL)
goto out;
if (t->parms.proto != ipproto && t->parms.proto != 0)
*msg = rel_msg;
out:
- read_unlock(&ip6_tnl_lock);
+ rcu_read_unlock();
return err;
}
static int
ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __be32 info)
+ u8 type, u8 code, int offset, __be32 info)
{
int rel_msg = 0;
- int rel_type = type;
- int rel_code = code;
+ u8 rel_type = type;
+ u8 rel_code = code;
__u32 rel_info = ntohl(info);
int err;
struct sk_buff *skb2;
if (!skb2)
return 0;
- dst_release(skb2->dst);
- skb2->dst = NULL;
+ skb_dst_drop(skb2);
+
skb_pull(skb2, offset);
skb_reset_network_header(skb2);
eiph = ip_hdr(skb2);
fl.fl4_dst = eiph->saddr;
fl.fl4_tos = RT_TOS(eiph->tos);
fl.proto = IPPROTO_IPIP;
- if (ip_route_output_key(&init_net, &rt, &fl))
+ if (ip_route_output_key(dev_net(skb->dev), &rt, &fl))
goto out;
skb2->dev = rt->u.dst.dev;
fl.fl4_dst = eiph->daddr;
fl.fl4_src = eiph->saddr;
fl.fl4_tos = eiph->tos;
- if (ip_route_output_key(&init_net, &rt, &fl) ||
+ if (ip_route_output_key(dev_net(skb->dev), &rt, &fl) ||
rt->u.dst.dev->type != ARPHRD_TUNNEL) {
ip_rt_put(rt);
goto out;
}
- skb2->dst = (struct dst_entry *)rt;
+ skb_dst_set(skb2, (struct dst_entry *)rt);
} else {
ip_rt_put(rt);
if (ip_route_input(skb2, eiph->daddr, eiph->saddr, eiph->tos,
skb2->dev) ||
- skb2->dst->dev->type != ARPHRD_TUNNEL)
+ skb_dst(skb2)->dev->type != ARPHRD_TUNNEL)
goto out;
}
/* change mtu on this route */
if (rel_type == ICMP_DEST_UNREACH && rel_code == ICMP_FRAG_NEEDED) {
- if (rel_info > dst_mtu(skb2->dst))
+ if (rel_info > dst_mtu(skb_dst(skb2)))
goto out;
- skb2->dst->ops->update_pmtu(skb2->dst, rel_info);
+ skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), rel_info);
}
icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
static int
ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
- int type, int code, int offset, __be32 info)
+ u8 type, u8 code, int offset, __be32 info)
{
int rel_msg = 0;
- int rel_type = type;
- int rel_code = code;
+ u8 rel_type = type;
+ u8 rel_code = code;
__u32 rel_info = ntohl(info);
int err;
if (!skb2)
return 0;
- dst_release(skb2->dst);
- skb2->dst = NULL;
+ skb_dst_drop(skb2);
skb_pull(skb2, offset);
skb_reset_network_header(skb2);
/* Try to guess incoming interface */
- rt = rt6_lookup(&ipv6_hdr(skb2)->saddr, NULL, 0, 0);
+ rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr,
+ NULL, 0, 0);
if (rt && rt->rt6i_dev)
skb2->dev = rt->rt6i_dev;
IP6_ECN_set_ce(ipv6_hdr(skb));
}
+/* called with rcu_read_lock() */
static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
{
struct ip6_tnl_parm *p = &t->parms;
int ret = 0;
+ struct net *net = dev_net(t->dev);
if (p->flags & IP6_TNL_F_CAP_RCV) {
struct net_device *ldev = NULL;
if (p->link)
- ldev = dev_get_by_index(&init_net, p->link);
+ ldev = dev_get_by_index_rcu(net, p->link);
if ((ipv6_addr_is_multicast(&p->laddr) ||
- likely(ipv6_chk_addr(&init_net, &p->laddr, ldev, 0))) &&
- likely(!ipv6_chk_addr(&init_net, &p->raddr, NULL, 0)))
+ likely(ipv6_chk_addr(net, &p->laddr, ldev, 0))) &&
+ likely(!ipv6_chk_addr(net, &p->raddr, NULL, 0)))
ret = 1;
- if (ldev)
- dev_put(ldev);
}
return ret;
}
struct ip6_tnl *t;
struct ipv6hdr *ipv6h = ipv6_hdr(skb);
- read_lock(&ip6_tnl_lock);
+ rcu_read_lock();
- if ((t = ip6_tnl_lookup(&ipv6h->saddr, &ipv6h->daddr)) != NULL) {
+ if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr,
+ &ipv6h->daddr)) != NULL) {
if (t->parms.proto != ipproto && t->parms.proto != 0) {
- read_unlock(&ip6_tnl_lock);
+ rcu_read_unlock();
goto discard;
}
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- read_unlock(&ip6_tnl_lock);
+ rcu_read_unlock();
goto discard;
}
if (!ip6_tnl_rcv_ctl(t)) {
- t->stat.rx_dropped++;
- read_unlock(&ip6_tnl_lock);
+ t->dev->stats.rx_dropped++;
+ rcu_read_unlock();
goto discard;
}
secpath_reset(skb);
skb->pkt_type = PACKET_HOST;
memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
skb->dev = t->dev;
- dst_release(skb->dst);
- skb->dst = NULL;
+ skb_dst_drop(skb);
nf_reset(skb);
dscp_ecn_decapsulate(t, ipv6h, skb);
- t->stat.rx_packets++;
- t->stat.rx_bytes += skb->len;
+ t->dev->stats.rx_packets++;
+ t->dev->stats.rx_bytes += skb->len;
netif_rx(skb);
- read_unlock(&ip6_tnl_lock);
+ rcu_read_unlock();
return 0;
}
- read_unlock(&ip6_tnl_lock);
+ rcu_read_unlock();
return 1;
discard:
{
struct ip6_tnl_parm *p = &t->parms;
int ret = 0;
+ struct net *net = dev_net(t->dev);
if (p->flags & IP6_TNL_F_CAP_XMIT) {
struct net_device *ldev = NULL;
+ rcu_read_lock();
if (p->link)
- ldev = dev_get_by_index(&init_net, p->link);
+ ldev = dev_get_by_index_rcu(net, p->link);
- if (unlikely(!ipv6_chk_addr(&init_net, &p->laddr, ldev, 0)))
+ if (unlikely(!ipv6_chk_addr(net, &p->laddr, ldev, 0)))
printk(KERN_WARNING
"%s xmit: Local address not yet configured!\n",
p->name);
else if (!ipv6_addr_is_multicast(&p->raddr) &&
- unlikely(ipv6_chk_addr(&init_net, &p->raddr, NULL, 0)))
+ unlikely(ipv6_chk_addr(net, &p->raddr, NULL, 0)))
printk(KERN_WARNING
"%s xmit: Routing loop! "
"Remote address found on this node!\n",
p->name);
else
ret = 1;
- if (ldev)
- dev_put(ldev);
+ rcu_read_unlock();
}
return ret;
}
int encap_limit,
__u32 *pmtu)
{
+ struct net *net = dev_net(dev);
struct ip6_tnl *t = netdev_priv(dev);
- struct net_device_stats *stats = &t->stat;
+ struct net_device_stats *stats = &t->dev->stats;
struct ipv6hdr *ipv6h = ipv6_hdr(skb);
struct ipv6_tel_txoption opt;
struct dst_entry *dst;
if ((dst = ip6_tnl_dst_check(t)) != NULL)
dst_hold(dst);
else {
- dst = ip6_route_output(NULL, fl);
+ dst = ip6_route_output(net, NULL, fl);
- if (dst->error || xfrm_lookup(&dst, fl, NULL, 0) < 0)
+ if (dst->error || xfrm_lookup(net, &dst, fl, NULL, 0) < 0)
goto tx_err_link_failure;
}
}
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
- if (skb->dst)
- skb->dst->ops->update_pmtu(skb->dst, mtu);
+ if (skb_dst(skb))
+ skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu);
if (skb->len > mtu) {
*pmtu = mtu;
err = -EMSGSIZE;
kfree_skb(skb);
skb = new_skb;
}
- dst_release(skb->dst);
- skb->dst = dst_clone(dst);
+ skb_dst_drop(skb);
+ skb_dst_set(skb, dst_clone(dst));
skb->transport_header = skb->network_header;
return 0;
}
-static int
+static netdev_tx_t
ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
- struct net_device_stats *stats = &t->stat;
+ struct net_device_stats *stats = &t->dev->stats;
int ret;
- if (t->recursion++) {
- t->stat.collisions++;
- goto tx_err;
- }
-
switch (skb->protocol) {
- case __constant_htons(ETH_P_IP):
+ case htons(ETH_P_IP):
ret = ip4ip6_tnl_xmit(skb, dev);
break;
- case __constant_htons(ETH_P_IPV6):
+ case htons(ETH_P_IPV6):
ret = ip6ip6_tnl_xmit(skb, dev);
break;
default:
if (ret < 0)
goto tx_err;
- t->recursion--;
- return 0;
+ return NETDEV_TX_OK;
tx_err:
stats->tx_errors++;
stats->tx_dropped++;
kfree_skb(skb);
- t->recursion--;
- return 0;
+ return NETDEV_TX_OK;
}
static void ip6_tnl_set_cap(struct ip6_tnl *t)
struct ip6_tnl_parm *p = &t->parms;
struct flowi *fl = &t->fl;
- memcpy(&dev->dev_addr, &p->laddr, sizeof(struct in6_addr));
- memcpy(&dev->broadcast, &p->raddr, sizeof(struct in6_addr));
+ memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr));
+ memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr));
/* Set up flowi template */
ipv6_addr_copy(&fl->fl6_src, &p->laddr);
int strict = (ipv6_addr_type(&p->raddr) &
(IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL));
- struct rt6_info *rt = rt6_lookup(&p->raddr, &p->laddr,
+ struct rt6_info *rt = rt6_lookup(dev_net(dev),
+ &p->raddr, &p->laddr,
p->link, strict);
if (rt == NULL)
* ip6_tnl_change - update the tunnel parameters
* @t: tunnel to be changed
* @p: tunnel configuration parameters
- * @active: != 0 if tunnel is ready for use
*
* Description:
* ip6_tnl_change() updates the tunnel parameters
int err = 0;
struct ip6_tnl_parm p;
struct ip6_tnl *t = NULL;
+ struct net *net = dev_net(dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
switch (cmd) {
case SIOCGETTUNNEL:
- if (dev == ip6_fb_tnl_dev) {
+ if (dev == ip6n->fb_tnl_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p))) {
err = -EFAULT;
break;
}
- t = ip6_tnl_locate(&p, 0);
+ t = ip6_tnl_locate(net, &p, 0);
}
if (t == NULL)
t = netdev_priv(dev);
if (p.proto != IPPROTO_IPV6 && p.proto != IPPROTO_IPIP &&
p.proto != 0)
break;
- t = ip6_tnl_locate(&p, cmd == SIOCADDTUNNEL);
- if (dev != ip6_fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
+ t = ip6_tnl_locate(net, &p, cmd == SIOCADDTUNNEL);
+ if (dev != ip6n->fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
if (t != NULL) {
if (t->dev != dev) {
err = -EEXIST;
} else
t = netdev_priv(dev);
- ip6_tnl_unlink(t);
+ ip6_tnl_unlink(ip6n, t);
err = ip6_tnl_change(t, &p);
- ip6_tnl_link(t);
+ ip6_tnl_link(ip6n, t);
netdev_state_change(dev);
}
if (t) {
if (!capable(CAP_NET_ADMIN))
break;
- if (dev == ip6_fb_tnl_dev) {
+ if (dev == ip6n->fb_tnl_dev) {
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
break;
err = -ENOENT;
- if ((t = ip6_tnl_locate(&p, 0)) == NULL)
+ if ((t = ip6_tnl_locate(net, &p, 0)) == NULL)
break;
err = -EPERM;
- if (t->dev == ip6_fb_tnl_dev)
+ if (t->dev == ip6n->fb_tnl_dev)
break;
dev = t->dev;
}
}
/**
- * ip6_tnl_get_stats - return the stats for tunnel device
- * @dev: virtual device associated with tunnel
- *
- * Return: stats for device
- **/
-
-static struct net_device_stats *
-ip6_tnl_get_stats(struct net_device *dev)
-{
- return &(((struct ip6_tnl *)netdev_priv(dev))->stat);
-}
-
-/**
* ip6_tnl_change_mtu - change mtu manually for tunnel device
* @dev: virtual device associated with tunnel
* @new_mtu: the new mtu
return 0;
}
+
+static const struct net_device_ops ip6_tnl_netdev_ops = {
+ .ndo_uninit = ip6_tnl_dev_uninit,
+ .ndo_start_xmit = ip6_tnl_xmit,
+ .ndo_do_ioctl = ip6_tnl_ioctl,
+ .ndo_change_mtu = ip6_tnl_change_mtu,
+};
+
/**
* ip6_tnl_dev_setup - setup virtual tunnel device
* @dev: virtual device associated with tunnel
static void ip6_tnl_dev_setup(struct net_device *dev)
{
- dev->uninit = ip6_tnl_dev_uninit;
+ dev->netdev_ops = &ip6_tnl_netdev_ops;
dev->destructor = free_netdev;
- dev->hard_start_xmit = ip6_tnl_xmit;
- dev->get_stats = ip6_tnl_get_stats;
- dev->do_ioctl = ip6_tnl_ioctl;
- dev->change_mtu = ip6_tnl_change_mtu;
dev->type = ARPHRD_TUNNEL6;
dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr);
dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr);
dev->flags |= IFF_NOARP;
dev->addr_len = sizeof(struct in6_addr);
+ dev->features |= NETIF_F_NETNS_LOCAL;
}
* @dev: virtual device associated with tunnel
**/
-static int
-ip6_tnl_dev_init(struct net_device *dev)
+static void ip6_tnl_dev_init(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
ip6_tnl_dev_init_gen(dev);
ip6_tnl_link_config(t);
- return 0;
}
/**
* Return: 0
**/
-static int
-ip6_fb_tnl_dev_init(struct net_device *dev)
+static void __net_init ip6_fb_tnl_dev_init(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
+ struct net *net = dev_net(dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+
ip6_tnl_dev_init_gen(dev);
t->parms.proto = IPPROTO_IPV6;
dev_hold(dev);
- tnls_wc[0] = t;
- return 0;
+ ip6n->tnls_wc[0] = t;
}
static struct xfrm6_tunnel ip4ip6_handler = {
.priority = 1,
};
+static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
+{
+ int h;
+ struct ip6_tnl *t;
+ LIST_HEAD(list);
+
+ for (h = 0; h < HASH_SIZE; h++) {
+ t = ip6n->tnls_r_l[h];
+ while (t != NULL) {
+ unregister_netdevice_queue(t->dev, &list);
+ t = t->next;
+ }
+ }
+
+ t = ip6n->tnls_wc[0];
+ unregister_netdevice_queue(t->dev, &list);
+ unregister_netdevice_many(&list);
+}
+
+static int __net_init ip6_tnl_init_net(struct net *net)
+{
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ int err;
+
+ ip6n->tnls[0] = ip6n->tnls_wc;
+ ip6n->tnls[1] = ip6n->tnls_r_l;
+
+ err = -ENOMEM;
+ ip6n->fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
+ ip6_tnl_dev_setup);
+
+ if (!ip6n->fb_tnl_dev)
+ goto err_alloc_dev;
+ dev_net_set(ip6n->fb_tnl_dev, net);
+
+ ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev);
+
+ err = register_netdev(ip6n->fb_tnl_dev);
+ if (err < 0)
+ goto err_register;
+ return 0;
+
+err_register:
+ free_netdev(ip6n->fb_tnl_dev);
+err_alloc_dev:
+ return err;
+}
+
+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);
+ rtnl_unlock();
+}
+
+static struct pernet_operations ip6_tnl_net_ops = {
+ .init = ip6_tnl_init_net,
+ .exit = ip6_tnl_exit_net,
+ .id = &ip6_tnl_net_id,
+ .size = sizeof(struct ip6_tnl_net),
+};
+
/**
* ip6_tunnel_init - register protocol and reserve needed resources
*
{
int err;
- if (xfrm6_tunnel_register(&ip4ip6_handler, AF_INET)) {
+ err = register_pernet_device(&ip6_tnl_net_ops);
+ if (err < 0)
+ goto out_pernet;
+
+ err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET);
+ if (err < 0) {
printk(KERN_ERR "ip6_tunnel init: can't register ip4ip6\n");
- err = -EAGAIN;
- goto out;
+ goto out_ip4ip6;
}
- if (xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6)) {
+ err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6);
+ if (err < 0) {
printk(KERN_ERR "ip6_tunnel init: can't register ip6ip6\n");
- err = -EAGAIN;
- goto unreg_ip4ip6;
- }
- ip6_fb_tnl_dev = alloc_netdev(sizeof(struct ip6_tnl), "ip6tnl0",
- ip6_tnl_dev_setup);
-
- if (!ip6_fb_tnl_dev) {
- err = -ENOMEM;
- goto fail;
+ goto out_ip6ip6;
}
- ip6_fb_tnl_dev->init = ip6_fb_tnl_dev_init;
- if ((err = register_netdev(ip6_fb_tnl_dev))) {
- free_netdev(ip6_fb_tnl_dev);
- goto fail;
- }
return 0;
-fail:
- xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6);
-unreg_ip4ip6:
+
+out_ip6ip6:
xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET);
-out:
+out_ip4ip6:
+ unregister_pernet_device(&ip6_tnl_net_ops);
+out_pernet:
return err;
}
-static void __exit ip6_tnl_destroy_tunnels(void)
-{
- int h;
- struct ip6_tnl *t;
-
- for (h = 0; h < HASH_SIZE; h++) {
- while ((t = tnls_r_l[h]) != NULL)
- unregister_netdevice(t->dev);
- }
-
- t = tnls_wc[0];
- unregister_netdevice(t->dev);
-}
-
/**
* ip6_tunnel_cleanup - free resources and unregister protocol
**/
if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6))
printk(KERN_INFO "ip6_tunnel close: can't deregister ip6ip6\n");
- rtnl_lock();
- ip6_tnl_destroy_tunnels();
- rtnl_unlock();
+ unregister_pernet_device(&ip6_tnl_net_ops);
}
module_init(ip6_tunnel_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff