Reuse common ip-tunneling code which is re-factored from GRE module.
Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
---
net/ipv4/ipip.c | 652 +++++--------------------------------------------------
1 file changed, 49 insertions(+), 603 deletions(-)
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 99af1f0..e7ca2f0 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -117,212 +117,10 @@
#include <net/net_namespace.h>
#include <net/netns/generic.h>
-#define HASH_SIZE 16
-#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
-
static int ipip_net_id __read_mostly;
-struct ipip_net {
- struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE];
- struct ip_tunnel __rcu *tunnels_r[HASH_SIZE];
- struct ip_tunnel __rcu *tunnels_l[HASH_SIZE];
- struct ip_tunnel __rcu *tunnels_wc[1];
- struct ip_tunnel __rcu **tunnels[4];
-
- struct net_device *fb_tunnel_dev;
-};
static int ipip_tunnel_init(struct net_device *dev);
-static void ipip_tunnel_setup(struct net_device *dev);
-static void ipip_dev_free(struct net_device *dev);
-
-/*
- * Locking : hash tables are protected by RCU and RTNL
- */
-
-#define for_each_ip_tunnel_rcu(start) \
- for (t = rcu_dereference(start); t; t = rcu_dereference(t->next))
-
-/* often modified stats are per cpu, other are shared (netdev->stats) */
-struct pcpu_tstats {
- u64 rx_packets;
- u64 rx_bytes;
- u64 tx_packets;
- u64 tx_bytes;
- struct u64_stats_sync syncp;
-};
-
-static struct rtnl_link_stats64 *ipip_get_stats64(struct net_device *dev,
- struct rtnl_link_stats64 *tot)
-{
- int i;
-
- for_each_possible_cpu(i) {
- const struct pcpu_tstats *tstats = per_cpu_ptr(dev->tstats, i);
- u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
- unsigned int start;
-
- do {
- start = u64_stats_fetch_begin_bh(&tstats->syncp);
- rx_packets = tstats->rx_packets;
- tx_packets = tstats->tx_packets;
- rx_bytes = tstats->rx_bytes;
- tx_bytes = tstats->tx_bytes;
- } while (u64_stats_fetch_retry_bh(&tstats->syncp, start));
-
- tot->rx_packets += rx_packets;
- tot->tx_packets += tx_packets;
- tot->rx_bytes += rx_bytes;
- tot->tx_bytes += tx_bytes;
- }
-
- tot->tx_fifo_errors = dev->stats.tx_fifo_errors;
- tot->tx_carrier_errors = dev->stats.tx_carrier_errors;
- tot->tx_dropped = dev->stats.tx_dropped;
- tot->tx_aborted_errors = dev->stats.tx_aborted_errors;
- tot->tx_errors = dev->stats.tx_errors;
- tot->collisions = dev->stats.collisions;
-
- return tot;
-}
-
-static struct ip_tunnel *ipip_tunnel_lookup(struct net *net,
- __be32 remote, __be32 local)
-{
- unsigned int h0 = HASH(remote);
- unsigned int h1 = HASH(local);
- struct ip_tunnel *t;
- struct ipip_net *ipn = net_generic(net, ipip_net_id);
-
- for_each_ip_tunnel_rcu(ipn->tunnels_r_l[h0 ^ h1])
- if (local == t->parms.iph.saddr &&
- remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
- return t;
-
- for_each_ip_tunnel_rcu(ipn->tunnels_r[h0])
- if (remote == t->parms.iph.daddr && (t->dev->flags&IFF_UP))
- return t;
-
- for_each_ip_tunnel_rcu(ipn->tunnels_l[h1])
- if (local == t->parms.iph.saddr && (t->dev->flags&IFF_UP))
- return t;
-
- t = rcu_dereference(ipn->tunnels_wc[0]);
- if (t && (t->dev->flags&IFF_UP))
- return t;
- return NULL;
-}
-
-static struct ip_tunnel __rcu **__ipip_bucket(struct ipip_net *ipn,
- struct ip_tunnel_parm *parms)
-{
- __be32 remote = parms->iph.daddr;
- __be32 local = parms->iph.saddr;
- unsigned int h = 0;
- int prio = 0;
-
- if (remote) {
- prio |= 2;
- h ^= HASH(remote);
- }
- if (local) {
- prio |= 1;
- h ^= HASH(local);
- }
- return &ipn->tunnels[prio][h];
-}
-
-static inline struct ip_tunnel __rcu **ipip_bucket(struct ipip_net *ipn,
- struct ip_tunnel *t)
-{
- return __ipip_bucket(ipn, &t->parms);
-}
-
-static void ipip_tunnel_unlink(struct ipip_net *ipn, struct ip_tunnel *t)
-{
- struct ip_tunnel __rcu **tp;
- struct ip_tunnel *iter;
-
- for (tp = ipip_bucket(ipn, t);
- (iter = rtnl_dereference(*tp)) != NULL;
- tp = &iter->next) {
- if (t == iter) {
- rcu_assign_pointer(*tp, t->next);
- break;
- }
- }
-}
-
-static void ipip_tunnel_link(struct ipip_net *ipn, struct ip_tunnel *t)
-{
- struct ip_tunnel __rcu **tp = ipip_bucket(ipn, t);
-
- rcu_assign_pointer(t->next, rtnl_dereference(*tp));
- rcu_assign_pointer(*tp, t);
-}
-
-static struct ip_tunnel *ipip_tunnel_locate(struct net *net,
- struct ip_tunnel_parm *parms, int create)
-{
- __be32 remote = parms->iph.daddr;
- __be32 local = parms->iph.saddr;
- struct ip_tunnel *t, *nt;
- struct ip_tunnel __rcu **tp;
- struct net_device *dev;
- char name[IFNAMSIZ];
- struct ipip_net *ipn = net_generic(net, ipip_net_id);
-
- for (tp = __ipip_bucket(ipn, parms);
- (t = rtnl_dereference(*tp)) != NULL;
- tp = &t->next) {
- if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr)
- return t;
- }
- if (!create)
- return NULL;
-
- if (parms->name[0])
- strlcpy(name, parms->name, IFNAMSIZ);
- else
- strcpy(name, "tunl%d");
-
- dev = alloc_netdev(sizeof(*t), name, ipip_tunnel_setup);
- if (dev == NULL)
- return NULL;
-
- dev_net_set(dev, net);
-
- nt = netdev_priv(dev);
- nt->parms = *parms;
-
- if (ipip_tunnel_init(dev) < 0)
- goto failed_free;
-
- if (register_netdevice(dev) < 0)
- goto failed_free;
-
- strcpy(nt->parms.name, dev->name);
-
- dev_hold(dev);
- ipip_tunnel_link(ipn, nt);
- return nt;
-
-failed_free:
- ipip_dev_free(dev);
- return NULL;
-}
-
-/* called with RTNL */
-static void ipip_tunnel_uninit(struct net_device *dev)
-{
- struct net *net = dev_net(dev);
- struct ipip_net *ipn = net_generic(net, ipip_net_id);
-
- if (dev == ipn->fb_tunnel_dev)
- RCU_INIT_POINTER(ipn->tunnels_wc[0], NULL);
- else
- ipip_tunnel_unlink(ipn, netdev_priv(dev));
- dev_put(dev);
-}
+static void ipip_tunnel_uninit(struct net_device *dev);
static int ipip_err(struct sk_buff *skb, u32 info)
{
@@ -331,6 +129,8 @@ static int ipip_err(struct sk_buff *skb, u32 info)
8 bytes of packet payload. It means, that precise relaying of
ICMP in the real Internet is absolutely infeasible.
*/
+ struct net *net = dev_net(skb->dev);
+ struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
const struct iphdr *iph = (const struct iphdr *)skb->data;
const int type = icmp_hdr(skb)->type;
const int code = icmp_hdr(skb)->code;
@@ -367,60 +167,29 @@ static int ipip_err(struct sk_buff *skb, u32 info)
err = -ENOENT;
rcu_read_lock();
- t = ipip_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr);
+ t = ip_tunnel_lookup(itn, ARPHRD_TUNNEL, skb->dev->ifindex,
+ iph->daddr, iph->saddr, 0);
if (t == NULL)
goto out;
- if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
- ipv4_update_pmtu(skb, dev_net(skb->dev), info,
- t->dev->ifindex, 0, IPPROTO_IPIP, 0);
- err = 0;
- goto out;
- }
-
- if (type == ICMP_REDIRECT) {
- ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0,
- IPPROTO_IPIP, 0);
- err = 0;
- goto out;
- }
-
- if (t->parms.iph.daddr == 0)
- goto out;
-
- err = 0;
- if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED)
- goto out;
+ ip_tunnel_err(t, skb, info);
- if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO))
- t->err_count++;
- else
- t->err_count = 1;
- t->err_time = jiffies;
out:
rcu_read_unlock();
return err;
}
-static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph,
- struct sk_buff *skb)
-{
- struct iphdr *inner_iph = ip_hdr(skb);
-
- if (INET_ECN_is_ce(outer_iph->tos))
- IP_ECN_set_ce(inner_iph);
-}
-
static int ipip_rcv(struct sk_buff *skb)
{
+ struct net *net = dev_net(skb->dev);
+ struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
struct ip_tunnel *tunnel;
const struct iphdr *iph = ip_hdr(skb);
rcu_read_lock();
- tunnel = ipip_tunnel_lookup(dev_net(skb->dev), iph->saddr, iph->daddr);
+ tunnel = ip_tunnel_lookup(itn, ARPHRD_TUNNEL, skb->dev->ifindex,
+ iph->saddr, iph->daddr, 0);
if (tunnel != NULL) {
- struct pcpu_tstats *tstats;
-
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
rcu_read_unlock();
kfree_skb(skb);
@@ -430,21 +199,9 @@ static int ipip_rcv(struct sk_buff *skb)
secpath_reset(skb);
skb->mac_header = skb->network_header;
- skb_reset_network_header(skb);
skb->protocol = htons(ETH_P_IP);
skb->pkt_type = PACKET_HOST;
-
- tstats = this_cpu_ptr(tunnel->dev->tstats);
- u64_stats_update_begin(&tstats->syncp);
- tstats->rx_packets++;
- tstats->rx_bytes += skb->len;
- u64_stats_update_end(&tstats->syncp);
-
- __skb_tunnel_rx(skb, tunnel->dev);
-
- ipip_ecn_decapsulate(iph, skb);
-
- netif_rx(skb);
+ ip_tunnel_rcv(skb, tunnel);
rcu_read_unlock();
return 0;
@@ -454,212 +211,40 @@ static int ipip_rcv(struct sk_buff *skb)
return -1;
}
+static void ip_ip_update_header(struct ip_tunnel *tunnel, struct sk_buff *skb)
+{
+ /* Do nothing. */
+}
+
/*
* This function assumes it is being called from dev_queue_xmit()
* and that skb is filled properly by that function.
*/
-
static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device
*dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
- struct pcpu_tstats *tstats;
const struct iphdr *tiph = &tunnel->parms.iph;
- u8 tos = tunnel->parms.iph.tos;
- __be16 df = tiph->frag_off;
- struct rtable *rt; /* Route to the other host */
- struct net_device *tdev; /* Device to other host */
- const struct iphdr *old_iph = ip_hdr(skb);
- struct iphdr *iph; /* Our new IP header */
- unsigned int max_headroom; /* The extra header space
needed */
- __be32 dst = tiph->daddr;
- struct flowi4 fl4;
- int mtu;
if (skb->protocol != htons(ETH_P_IP))
goto tx_error;
- if (tos & 1)
- tos = old_iph->tos;
-
- if (!dst) {
- /* NBMA tunnel */
- if ((rt = skb_rtable(skb)) == NULL) {
- dev->stats.tx_fifo_errors++;
- goto tx_error;
- }
- dst = rt_nexthop(rt, old_iph->daddr);
- }
-
- rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
- dst, tiph->saddr,
- 0, 0,
- IPPROTO_IPIP, RT_TOS(tos),
- tunnel->parms.link);
- if (IS_ERR(rt)) {
- dev->stats.tx_carrier_errors++;
- goto tx_error_icmp;
- }
- tdev = rt->dst.dev;
-
- if (tdev == dev) {
- ip_rt_put(rt);
- dev->stats.collisions++;
- goto tx_error;
- }
-
- df |= old_iph->frag_off & htons(IP_DF);
-
- if (df) {
- mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr);
-
- if (mtu < 68) {
- dev->stats.collisions++;
- ip_rt_put(rt);
- goto tx_error;
- }
-
- if (skb_dst(skb))
- skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb,
mtu);
-
- if ((old_iph->frag_off & htons(IP_DF)) &&
- mtu < ntohs(old_iph->tot_len)) {
- icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
- htonl(mtu));
- ip_rt_put(rt);
- goto tx_error;
- }
- }
-
- if (tunnel->err_count > 0) {
- if (time_before(jiffies,
- tunnel->err_time + IPTUNNEL_ERR_TIMEO)) {
- tunnel->err_count--;
- dst_link_failure(skb);
- } else
- tunnel->err_count = 0;
- }
-
- /*
- * Okay, now see if we can stuff it in the buffer as-is.
- */
- max_headroom = (LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr));
-
- if (skb_headroom(skb) < max_headroom || skb_shared(skb) ||
- (skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
- struct sk_buff *new_skb = skb_realloc_headroom(skb,
max_headroom);
- if (!new_skb) {
- ip_rt_put(rt);
- dev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- if (skb->sk)
- skb_set_owner_w(new_skb, skb->sk);
- dev_kfree_skb(skb);
- skb = new_skb;
- old_iph = ip_hdr(skb);
- }
+ return ip_tunnel_xmit(skb, dev, tiph, sizeof(struct iphdr));
- skb->transport_header = skb->network_header;
- skb_push(skb, sizeof(struct iphdr));
- skb_reset_network_header(skb);
- memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
- IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
- IPSKB_REROUTED);
- skb_dst_drop(skb);
- skb_dst_set(skb, &rt->dst);
-
- /*
- * Push down and install the IPIP header.
- */
-
- iph = ip_hdr(skb);
- iph->version = 4;
- iph->ihl = sizeof(struct iphdr)>>2;
- iph->frag_off = df;
- iph->protocol = IPPROTO_IPIP;
- iph->tos = INET_ECN_encapsulate(tos, old_iph->tos);
- iph->daddr = fl4.daddr;
- iph->saddr = fl4.saddr;
-
- if ((iph->ttl = tiph->ttl) == 0)
- iph->ttl = old_iph->ttl;
-
- nf_reset(skb);
- tstats = this_cpu_ptr(dev->tstats);
- __IPTUNNEL_XMIT(tstats, &dev->stats);
- return NETDEV_TX_OK;
-
-tx_error_icmp:
- dst_link_failure(skb);
tx_error:
dev->stats.tx_errors++;
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
-static void ipip_tunnel_bind_dev(struct net_device *dev)
-{
- struct net_device *tdev = NULL;
- struct ip_tunnel *tunnel;
- const struct iphdr *iph;
-
- tunnel = netdev_priv(dev);
- iph = &tunnel->parms.iph;
-
- if (iph->daddr) {
- struct rtable *rt;
- struct flowi4 fl4;
-
- rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
- iph->daddr, iph->saddr,
- 0, 0,
- IPPROTO_IPIP,
- RT_TOS(iph->tos),
- tunnel->parms.link);
- if (!IS_ERR(rt)) {
- tdev = rt->dst.dev;
- ip_rt_put(rt);
- }
- dev->flags |= IFF_POINTOPOINT;
- }
-
- if (!tdev && tunnel->parms.link)
- tdev = __dev_get_by_index(dev_net(dev), tunnel->parms.link);
-
- if (tdev) {
- dev->hard_header_len = tdev->hard_header_len + sizeof(struct
iphdr);
- dev->mtu = tdev->mtu - sizeof(struct iphdr);
- }
- dev->iflink = tunnel->parms.link;
-}
-
static int
-ipip_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
+ipip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
- int err = 0;
struct ip_tunnel_parm p;
- struct ip_tunnel *t;
struct net *net = dev_net(dev);
- struct ipip_net *ipn = net_generic(net, ipip_net_id);
+ struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
+ int err = 0;
switch (cmd) {
- case SIOCGETTUNNEL:
- t = NULL;
- if (dev == ipn->fb_tunnel_dev) {
- if (copy_from_user(&p, ifr->ifr_ifru.ifru_data,
sizeof(p))) {
- err = -EFAULT;
- break;
- }
- t = ipip_tunnel_locate(net, &p, 0);
- }
- if (t == NULL)
- t = netdev_priv(dev);
- memcpy(&p, &t->parms, sizeof(p));
- if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
- err = -EFAULT;
- break;
-
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
err = -EPERM;
@@ -676,109 +261,34 @@ ipip_tunnel_ioctl (struct net_device *dev, struct ifreq
*ifr, int cmd)
goto done;
if (p.iph.ttl)
p.iph.frag_off |= htons(IP_DF);
-
- t = ipip_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL);
-
- if (dev != ipn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) {
- if (t != NULL) {
- if (t->dev != dev) {
- err = -EEXIST;
- break;
- }
- } else {
- if (((dev->flags&IFF_POINTOPOINT) &&
!p.iph.daddr) ||
- (!(dev->flags&IFF_POINTOPOINT) &&
p.iph.daddr)) {
- err = -EINVAL;
- break;
- }
- t = netdev_priv(dev);
- ipip_tunnel_unlink(ipn, t);
- synchronize_net();
- t->parms.iph.saddr = p.iph.saddr;
- t->parms.iph.daddr = p.iph.daddr;
- memcpy(dev->dev_addr, &p.iph.saddr, 4);
- memcpy(dev->broadcast, &p.iph.daddr, 4);
- ipip_tunnel_link(ipn, t);
- netdev_state_change(dev);
- }
- }
-
- if (t) {
- err = 0;
- if (cmd == SIOCCHGTUNNEL) {
- t->parms.iph.ttl = p.iph.ttl;
- t->parms.iph.tos = p.iph.tos;
- t->parms.iph.frag_off = p.iph.frag_off;
- if (t->parms.link != p.link) {
- t->parms.link = p.link;
- ipip_tunnel_bind_dev(dev);
- netdev_state_change(dev);
- }
- }
- if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms,
sizeof(p)))
- err = -EFAULT;
- } else
- err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT);
- break;
-
- case SIOCDELTUNNEL:
- err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (p.i_key || p.o_key || p.i_flags || p.o_flags)
goto done;
-
- if (dev == ipn->fb_tunnel_dev) {
- err = -EFAULT;
- if (copy_from_user(&p, ifr->ifr_ifru.ifru_data,
sizeof(p)))
- goto done;
- err = -ENOENT;
- if ((t = ipip_tunnel_locate(net, &p, 0)) == NULL)
- goto done;
- err = -EPERM;
- if (t->dev == ipn->fb_tunnel_dev)
- goto done;
- dev = t->dev;
- }
- unregister_netdevice(dev);
- err = 0;
break;
default:
err = -EINVAL;
}
-
+ return ip_tunnel_ioctl(itn, dev, ifr, cmd);
done:
return err;
}
-static int ipip_tunnel_change_mtu(struct net_device *dev, int new_mtu)
-{
- if (new_mtu < 68 || new_mtu > 0xFFF8 - sizeof(struct iphdr))
- return -EINVAL;
- dev->mtu = new_mtu;
- return 0;
-}
-
static const struct net_device_ops ipip_netdev_ops = {
+ .ndo_init = ipip_tunnel_init,
.ndo_uninit = ipip_tunnel_uninit,
.ndo_start_xmit = ipip_tunnel_xmit,
.ndo_do_ioctl = ipip_tunnel_ioctl,
- .ndo_change_mtu = ipip_tunnel_change_mtu,
- .ndo_get_stats64 = ipip_get_stats64,
+ .ndo_change_mtu = ip_tunnel_change_mtu,
+ .ndo_get_stats64 = ip_tunnel_get_stats64,
};
-static void ipip_dev_free(struct net_device *dev)
-{
- free_percpu(dev->tstats);
- free_netdev(dev);
-}
-
static void ipip_tunnel_setup(struct net_device *dev)
{
dev->netdev_ops = &ipip_netdev_ops;
- dev->destructor = ipip_dev_free;
+ dev->destructor = ip_tunnel_dev_free;
dev->type = ARPHRD_TUNNEL;
- dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr);
+ dev->needed_headroom = LL_MAX_HEADER + sizeof(struct iphdr);
dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr);
dev->flags = IFF_NOARP;
dev->iflink = 0;
@@ -791,41 +301,33 @@ static void ipip_tunnel_setup(struct net_device *dev)
static int ipip_tunnel_init(struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
+ struct iphdr *iph;
+ int err;
+
+ err = ip_tunnel_init(dev, IPPROTO_IPIP);
+ if (err < 0)
+ return err;
- tunnel->dev = dev;
+ tunnel->hlen = sizeof(struct iphdr);
+ tunnel->update_header = ip_ip_update_header;
+ tunnel->setup = ipip_tunnel_setup;
+ strlcpy(tunnel->kind, "tunl", IFNAMSIZ);
memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
- ipip_tunnel_bind_dev(dev);
-
- dev->tstats = alloc_percpu(struct pcpu_tstats);
- if (!dev->tstats)
- return -ENOMEM;
+ iph = &tunnel->parms.iph;
+ if (iph->daddr)
+ dev->flags |= IFF_POINTOPOINT;
return 0;
}
-static int __net_init ipip_fb_tunnel_init(struct net_device *dev)
+static void ipip_tunnel_uninit(struct net_device *dev)
{
- struct ip_tunnel *tunnel = netdev_priv(dev);
- struct iphdr *iph = &tunnel->parms.iph;
- struct ipip_net *ipn = net_generic(dev_net(dev), ipip_net_id);
-
- tunnel->dev = dev;
- strcpy(tunnel->parms.name, dev->name);
-
- iph->version = 4;
- iph->protocol = IPPROTO_IPIP;
- iph->ihl = 5;
-
- dev->tstats = alloc_percpu(struct pcpu_tstats);
- if (!dev->tstats)
- return -ENOMEM;
-
- dev_hold(dev);
- rcu_assign_pointer(ipn->tunnels_wc[0], tunnel);
- return 0;
+ struct net *net = dev_net(dev);
+ struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
+ ip_tunnel_uninit(itn, dev);
}
static struct xfrm_tunnel ipip_handler __read_mostly = {
@@ -837,80 +339,24 @@ static struct xfrm_tunnel ipip_handler __read_mostly = {
static const char banner[] __initconst =
KERN_INFO "IPv4 over IPv4 tunneling driver\n";
-static void ipip_destroy_tunnels(struct ipip_net *ipn, struct list_head *head)
-{
- int prio;
-
- for (prio = 1; prio < 4; prio++) {
- int h;
- for (h = 0; h < HASH_SIZE; h++) {
- struct ip_tunnel *t;
-
- t = rtnl_dereference(ipn->tunnels[prio][h]);
- while (t != NULL) {
- unregister_netdevice_queue(t->dev, head);
- t = rtnl_dereference(t->next);
- }
- }
- }
-}
-
static int __net_init ipip_init_net(struct net *net)
{
- struct ipip_net *ipn = net_generic(net, ipip_net_id);
- struct ip_tunnel *t;
- int err;
-
- ipn->tunnels[0] = ipn->tunnels_wc;
- ipn->tunnels[1] = ipn->tunnels_l;
- ipn->tunnels[2] = ipn->tunnels_r;
- ipn->tunnels[3] = ipn->tunnels_r_l;
-
- ipn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel),
- "tunl0",
- ipip_tunnel_setup);
- if (!ipn->fb_tunnel_dev) {
- err = -ENOMEM;
- goto err_alloc_dev;
- }
- dev_net_set(ipn->fb_tunnel_dev, net);
-
- err = ipip_fb_tunnel_init(ipn->fb_tunnel_dev);
- if (err)
- goto err_reg_dev;
+ struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
- if ((err = register_netdev(ipn->fb_tunnel_dev)))
- goto err_reg_dev;
-
- t = netdev_priv(ipn->fb_tunnel_dev);
-
- strcpy(t->parms.name, ipn->fb_tunnel_dev->name);
- return 0;
-
-err_reg_dev:
- ipip_dev_free(ipn->fb_tunnel_dev);
-err_alloc_dev:
- /* nothing */
- return err;
+ return ip_tunnel_init_net(net, itn, NULL, "tunl0", ipip_tunnel_setup);
}
static void __net_exit ipip_exit_net(struct net *net)
{
- struct ipip_net *ipn = net_generic(net, ipip_net_id);
- LIST_HEAD(list);
-
- rtnl_lock();
- ipip_destroy_tunnels(ipn, &list);
- unregister_netdevice_queue(ipn->fb_tunnel_dev, &list);
- unregister_netdevice_many(&list);
- rtnl_unlock();
+ struct ip_tunnel_net *itn = net_generic(net, ipip_net_id);
+ ip_tunnel_exit_net(itn);
}
static struct pernet_operations ipip_net_ops = {
.init = ipip_init_net,
.exit = ipip_exit_net,
.id = &ipip_net_id,
- .size = sizeof(struct ipip_net),
+ .size = sizeof(struct ip_tunnel_net),
};
static int __init ipip_init(void)
--
1.7.10
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