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Diffstat (limited to 'net/ipv6/ip6_tunnel.c')
-rw-r--r--net/ipv6/ip6_tunnel.c1211
1 files changed, 813 insertions, 398 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 78f43888092..afa08245836 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -6,8 +6,6 @@
* 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
*
@@ -20,6 +18,8 @@
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/capability.h>
#include <linux/errno.h>
@@ -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>
@@ -39,12 +38,16 @@
#include <linux/route.h>
#include <linux/rtnetlink.h>
#include <linux/netfilter_ipv6.h>
+#include <linux/slab.h>
+#include <linux/hash.h>
+#include <linux/etherdevice.h>
#include <asm/uaccess.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include <net/icmp.h>
#include <net/ip.h>
+#include <net/ip_tunnels.h>
#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
@@ -52,45 +55,84 @@
#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");
MODULE_LICENSE("GPL");
-
-#define IPV6_TLV_TEL_DST_SIZE 8
+MODULE_ALIAS_RTNL_LINK("ip6tnl");
+MODULE_ALIAS_NETDEV("ip6tnl0");
#ifdef IP6_TNL_DEBUG
-#define IP6_TNL_TRACE(x...) printk(KERN_DEBUG "%s:" x "\n", __FUNCTION__)
+#define IP6_TNL_TRACE(x...) pr_debug("%s:" x "\n", __func__)
#else
#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)
+
+static bool log_ecn_error = true;
+module_param(log_ecn_error, bool, 0644);
+MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN");
-#define HASH_SIZE 32
+static u32 HASH(const struct in6_addr *addr1, const struct in6_addr *addr2)
+{
+ u32 hash = ipv6_addr_hash(addr1) ^ ipv6_addr_hash(addr2);
-#define HASH(addr) ((__force u32)((addr)->s6_addr32[0] ^ (addr)->s6_addr32[1] ^ \
- (addr)->s6_addr32[2] ^ (addr)->s6_addr32[3]) & \
- (HASH_SIZE - 1))
+ return hash_32(hash, HASH_SIZE_SHIFT);
+}
-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_setup(struct net_device *dev);
+static struct rtnl_link_ops ip6_link_ops __read_mostly;
+
+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 __rcu *tnls_r_l[HASH_SIZE];
+ struct ip6_tnl __rcu *tnls_wc[1];
+ struct ip6_tnl __rcu **tnls[2];
+};
-/* 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 struct net_device_stats *ip6_get_stats(struct net_device *dev)
+{
+ struct pcpu_sw_netstats tmp, sum = { 0 };
+ int i;
+
+ for_each_possible_cpu(i) {
+ 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;
+ dev->stats.tx_packets = sum.tx_packets;
+ dev->stats.tx_bytes = sum.tx_bytes;
+ return &dev->stats;
+}
-/* lock for the tunnel lists */
-static DEFINE_RWLOCK(ip6_tnl_lock);
+/*
+ * Locking : hash tables are protected by RCU and RTNL
+ */
-static inline struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t)
+struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t)
{
struct dst_entry *dst = t->dst_cache;
@@ -103,20 +145,23 @@ static inline struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t)
return dst;
}
+EXPORT_SYMBOL_GPL(ip6_tnl_dst_check);
-static inline void ip6_tnl_dst_reset(struct ip6_tnl *t)
+void ip6_tnl_dst_reset(struct ip6_tnl *t)
{
dst_release(t->dst_cache);
t->dst_cache = NULL;
}
+EXPORT_SYMBOL_GPL(ip6_tnl_dst_reset);
-static inline void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)
+void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)
{
struct rt6_info *rt = (struct rt6_info *) dst;
t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
dst_release(t->dst_cache);
t->dst_cache = dst;
}
+EXPORT_SYMBOL_GPL(ip6_tnl_dst_store);
/**
* ip6_tnl_lookup - fetch tunnel matching the end-point addresses
@@ -129,20 +174,24 @@ static inline void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst)
* 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, const struct in6_addr *remote, const struct in6_addr *local)
{
- unsigned h0 = HASH(remote);
- unsigned h1 = HASH(local);
+ unsigned int hash = HASH(remote, 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[hash]) {
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;
@@ -159,19 +208,19 @@ ip6_tnl_lookup(struct in6_addr *remote, struct in6_addr *local)
* Return: head of IPv6 tunnel list
**/
-static struct ip6_tnl **
-ip6_tnl_bucket(struct ip6_tnl_parm *p)
+static struct ip6_tnl __rcu **
+ip6_tnl_bucket(struct ip6_tnl_net *ip6n, const struct __ip6_tnl_parm *p)
{
- struct in6_addr *remote = &p->raddr;
- struct in6_addr *local = &p->laddr;
- unsigned h = 0;
+ const struct in6_addr *remote = &p->raddr;
+ const struct in6_addr *local = &p->laddr;
+ unsigned int h = 0;
int prio = 0;
if (!ipv6_addr_any(remote) || !ipv6_addr_any(local)) {
prio = 1;
- h = HASH(remote) ^ HASH(local);
+ h = HASH(remote, local);
}
- return &tnls[prio][h];
+ return &ip6n->tnls[prio][h];
}
/**
@@ -180,14 +229,12 @@ ip6_tnl_bucket(struct ip6_tnl_parm *p)
**/
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 __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms);
- t->next = *tp;
- write_lock_bh(&ip6_tnl_lock);
- *tp = t;
- write_unlock_bh(&ip6_tnl_lock);
+ rcu_assign_pointer(t->next , rtnl_dereference(*tp));
+ rcu_assign_pointer(*tp, t);
}
/**
@@ -196,22 +243,56 @@ ip6_tnl_link(struct ip6_tnl *t)
**/
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) {
- if (t == *tp) {
- write_lock_bh(&ip6_tnl_lock);
- *tp = t->next;
- write_unlock_bh(&ip6_tnl_lock);
+ struct ip6_tnl __rcu **tp;
+ struct ip6_tnl *iter;
+
+ for (tp = ip6_tnl_bucket(ip6n, &t->parms);
+ (iter = rtnl_dereference(*tp)) != NULL;
+ tp = &iter->next) {
+ if (t == iter) {
+ rcu_assign_pointer(*tp, t->next);
break;
}
}
}
+static void ip6_dev_free(struct net_device *dev)
+{
+ free_percpu(dev->tstats);
+ free_netdev(dev);
+}
+
+static int ip6_tnl_create2(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);
+ int err;
+
+ t = netdev_priv(dev);
+ err = ip6_tnl_dev_init(dev);
+ if (err < 0)
+ goto out;
+
+ err = register_netdevice(dev);
+ if (err < 0)
+ goto out;
+
+ strcpy(t->parms.name, dev->name);
+ dev->rtnl_link_ops = &ip6_link_ops;
+
+ dev_hold(dev);
+ ip6_tnl_link(ip6n, t);
+ return 0;
+
+out:
+ return err;
+}
+
/**
- * ip6_tnl_create() - create a new tunnel
+ * ip6_tnl_create - create a new tunnel
* @p: tunnel parameters
* @pt: pointer to new tunnel
*
@@ -222,7 +303,7 @@ ip6_tnl_unlink(struct ip6_tnl *t)
* 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;
@@ -238,24 +319,19 @@ static struct ip6_tnl *ip6_tnl_create(struct ip6_tnl_parm *p)
if (dev == NULL)
goto failed;
- if (strchr(name, '%')) {
- if (dev_alloc_name(dev, name) < 0)
- goto failed_free;
- }
+ dev_net_set(dev, net);
t = netdev_priv(dev);
- dev->init = ip6_tnl_dev_init;
t->parms = *p;
-
- if ((err = register_netdevice(dev)) < 0)
+ t->net = dev_net(dev);
+ err = ip6_tnl_create2(dev);
+ if (err < 0)
goto failed_free;
- dev_hold(dev);
- ip6_tnl_link(t);
return t;
failed_free:
- free_netdev(dev);
+ ip6_dev_free(dev);
failed:
return NULL;
}
@@ -274,20 +350,25 @@ failed:
* 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;
+ const struct in6_addr *remote = &p->raddr;
+ const struct in6_addr *local = &p->laddr;
+ struct ip6_tnl __rcu **tp;
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 (tp = ip6_tnl_bucket(ip6n, p);
+ (t = rtnl_dereference(*tp)) != NULL;
+ tp = &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);
}
/**
@@ -302,14 +383,13 @@ static void
ip6_tnl_dev_uninit(struct net_device *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);
- if (dev == ip6_fb_tnl_dev) {
- write_lock_bh(&ip6_tnl_lock);
- tnls_wc[0] = NULL;
- write_unlock_bh(&ip6_tnl_lock);
- } else {
- ip6_tnl_unlink(t);
- }
+ if (dev == ip6n->fb_tnl_dev)
+ RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL);
+ else
+ ip6_tnl_unlink(ip6n, t);
ip6_tnl_dst_reset(t);
dev_put(dev);
}
@@ -323,10 +403,9 @@ ip6_tnl_dev_uninit(struct net_device *dev)
* else index to encapsulation limit
**/
-static __u16
-parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw)
+__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw)
{
- struct ipv6hdr *ipv6h = (struct ipv6hdr *) raw;
+ const struct ipv6hdr *ipv6h = (const struct ipv6hdr *) raw;
__u8 nexthdr = ipv6h->nexthdr;
__u16 off = sizeof (*ipv6h);
@@ -374,6 +453,7 @@ parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw)
}
return 0;
}
+EXPORT_SYMBOL(ip6_tnl_parse_tlv_enc_lim);
/**
* ip6_tnl_err - tunnel error handler
@@ -385,13 +465,13 @@ parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw)
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;
+ const struct ipv6hdr *ipv6h = (const 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;
@@ -400,8 +480,9 @@ ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
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)
@@ -414,41 +495,32 @@ ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
struct ipv6_tlv_tnl_enc_lim *tel;
__u32 mtu;
case ICMPV6_DEST_UNREACH:
- if (net_ratelimit())
- printk(KERN_WARNING
- "%s: Path to destination invalid "
- "or inactive!\n", t->parms.name);
+ net_warn_ratelimited("%s: Path to destination invalid or inactive!\n",
+ t->parms.name);
rel_msg = 1;
break;
case ICMPV6_TIME_EXCEED:
if ((*code) == ICMPV6_EXC_HOPLIMIT) {
- if (net_ratelimit())
- printk(KERN_WARNING
- "%s: Too small hop limit or "
- "routing loop in tunnel!\n",
- t->parms.name);
+ net_warn_ratelimited("%s: Too small hop limit or routing loop in tunnel!\n",
+ t->parms.name);
rel_msg = 1;
}
break;
case ICMPV6_PARAMPROB:
teli = 0;
if ((*code) == ICMPV6_HDR_FIELD)
- teli = parse_tlv_tnl_enc_lim(skb, skb->data);
+ teli = ip6_tnl_parse_tlv_enc_lim(skb, skb->data);
if (teli && teli == *info - 2) {
tel = (struct ipv6_tlv_tnl_enc_lim *) &skb->data[teli];
if (tel->encap_limit == 0) {
- if (net_ratelimit())
- printk(KERN_WARNING
- "%s: Too small encapsulation "
- "limit or routing loop in "
- "tunnel!\n", t->parms.name);
+ net_warn_ratelimited("%s: Too small encapsulation limit or routing loop in tunnel!\n",
+ t->parms.name);
rel_msg = 1;
}
- } else if (net_ratelimit()) {
- printk(KERN_WARNING
- "%s: Recipient unable to parse tunneled "
- "packet!\n ", t->parms.name);
+ } else {
+ net_warn_ratelimited("%s: Recipient unable to parse tunneled packet!\n",
+ t->parms.name);
}
break;
case ICMPV6_PKT_TOOBIG:
@@ -472,23 +544,23 @@ ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt,
*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;
- struct iphdr *eiph;
- struct flowi fl;
+ const struct iphdr *eiph;
struct rtable *rt;
+ struct flowi4 fl4;
err = ip6_tnl_err(skb, IPPROTO_IPIP, opt, &rel_type, &rel_code,
&rel_msg, &rel_info, offset);
@@ -511,6 +583,9 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
rel_type = ICMP_DEST_UNREACH;
rel_code = ICMP_FRAG_NEEDED;
break;
+ case NDISC_REDIRECT:
+ rel_type = ICMP_REDIRECT;
+ rel_code = ICMP_REDIR_HOST;
default:
return 0;
}
@@ -522,50 +597,55 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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);
/* Try to guess incoming interface */
- memset(&fl, 0, sizeof(fl));
- 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))
+ rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL,
+ eiph->saddr, 0,
+ 0, 0,
+ IPPROTO_IPIP, RT_TOS(eiph->tos), 0);
+ if (IS_ERR(rt))
goto out;
- skb2->dev = rt->u.dst.dev;
+ skb2->dev = rt->dst.dev;
/* route "incoming" packet */
if (rt->rt_flags & RTCF_LOCAL) {
ip_rt_put(rt);
rt = NULL;
- fl.fl4_dst = eiph->daddr;
- fl.fl4_src = eiph->saddr;
- fl.fl4_tos = eiph->tos;
- if (ip_route_output_key(&init_net, &rt, &fl) ||
- rt->u.dst.dev->type != ARPHRD_TUNNEL) {
- ip_rt_put(rt);
+ rt = ip_route_output_ports(dev_net(skb->dev), &fl4, NULL,
+ eiph->daddr, eiph->saddr,
+ 0, 0,
+ IPPROTO_IPIP,
+ RT_TOS(eiph->tos), 0);
+ if (IS_ERR(rt) ||
+ rt->dst.dev->type != ARPHRD_TUNNEL) {
+ if (!IS_ERR(rt))
+ ip_rt_put(rt);
goto out;
}
- skb2->dst = (struct dst_entry *)rt;
+ skb_dst_set(skb2, &rt->dst);
} 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), NULL, skb2, rel_info);
}
+ if (rel_type == ICMP_REDIRECT)
+ skb_dst(skb2)->ops->redirect(skb_dst(skb2), NULL, skb2);
icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
@@ -576,11 +656,11 @@ out:
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;
@@ -596,21 +676,20 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
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;
+ if (rt && rt->dst.dev)
+ skb2->dev = rt->dst.dev;
- icmpv6_send(skb2, rel_type, rel_code, rel_info, skb2->dev);
+ icmpv6_send(skb2, rel_type, rel_code, rel_info);
- if (rt)
- dst_release(&rt->u.dst);
+ ip6_rt_put(rt);
kfree_skb(skb2);
}
@@ -618,51 +697,77 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
return 0;
}
-static void ip4ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
- struct ipv6hdr *ipv6h,
- struct sk_buff *skb)
+static int ip4ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t,
+ const struct ipv6hdr *ipv6h,
+ struct sk_buff *skb)
{
__u8 dsfield = ipv6_get_dsfield(ipv6h) & ~INET_ECN_MASK;
if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
ipv4_change_dsfield(ip_hdr(skb), INET_ECN_MASK, dsfield);
- if (INET_ECN_is_ce(dsfield))
- IP_ECN_set_ce(ip_hdr(skb));
+ return IP6_ECN_decapsulate(ipv6h, skb);
}
-static void ip6ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
- struct ipv6hdr *ipv6h,
- struct sk_buff *skb)
+static int ip6ip6_dscp_ecn_decapsulate(const struct ip6_tnl *t,
+ const struct ipv6hdr *ipv6h,
+ struct sk_buff *skb)
{
if (t->parms.flags & IP6_TNL_F_RCV_DSCP_COPY)
ipv6_copy_dscp(ipv6_get_dsfield(ipv6h), ipv6_hdr(skb));
- if (INET_ECN_is_ce(ipv6_get_dsfield(ipv6h)))
- IP6_ECN_set_ce(ipv6_hdr(skb));
+ return IP6_ECN_decapsulate(ipv6h, skb);
+}
+
+__u32 ip6_tnl_get_cap(struct ip6_tnl *t,
+ const struct in6_addr *laddr,
+ const struct in6_addr *raddr)
+{
+ struct __ip6_tnl_parm *p = &t->parms;
+ int ltype = ipv6_addr_type(laddr);
+ int rtype = ipv6_addr_type(raddr);
+ __u32 flags = 0;
+
+ if (ltype == IPV6_ADDR_ANY || rtype == IPV6_ADDR_ANY) {
+ flags = IP6_TNL_F_CAP_PER_PACKET;
+ } else if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
+ rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
+ !((ltype|rtype) & IPV6_ADDR_LOOPBACK) &&
+ (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) {
+ if (ltype&IPV6_ADDR_UNICAST)
+ flags |= IP6_TNL_F_CAP_XMIT;
+ if (rtype&IPV6_ADDR_UNICAST)
+ flags |= IP6_TNL_F_CAP_RCV;
+ }
+ return flags;
}
+EXPORT_SYMBOL(ip6_tnl_get_cap);
-static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
+/* called with rcu_read_lock() */
+int ip6_tnl_rcv_ctl(struct ip6_tnl *t,
+ const struct in6_addr *laddr,
+ const struct in6_addr *raddr)
{
- struct ip6_tnl_parm *p = &t->parms;
+ struct __ip6_tnl_parm *p = &t->parms;
int ret = 0;
+ struct net *net = t->net;
- if (p->flags & IP6_TNL_F_CAP_RCV) {
+ if ((p->flags & IP6_TNL_F_CAP_RCV) ||
+ ((p->flags & IP6_TNL_F_CAP_PER_PACKET) &&
+ (ip6_tnl_get_cap(t, laddr, raddr) & 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)))
+ if ((ipv6_addr_is_multicast(laddr) ||
+ likely(ipv6_chk_addr(net, laddr, ldev, 0))) &&
+ likely(!ipv6_chk_addr(net, raddr, NULL, 0)))
ret = 1;
-
- if (ldev)
- dev_put(ldev);
}
return ret;
}
+EXPORT_SYMBOL_GPL(ip6_tnl_rcv_ctl);
/**
* ip6_tnl_rcv - decapsulate IPv6 packet and retransmit it locally
@@ -675,51 +780,68 @@ static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
__u8 ipproto,
- void (*dscp_ecn_decapsulate)(struct ip6_tnl *t,
- struct ipv6hdr *ipv6h,
- struct sk_buff *skb))
+ int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t,
+ const struct ipv6hdr *ipv6h,
+ struct sk_buff *skb))
{
struct ip6_tnl *t;
- struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+ const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+ int err;
+
+ rcu_read_lock();
- read_lock(&ip6_tnl_lock);
+ if ((t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr,
+ &ipv6h->daddr)) != NULL) {
+ struct pcpu_sw_netstats *tstats;
- if ((t = ip6_tnl_lookup(&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);
+ if (!ip6_tnl_rcv_ctl(t, &ipv6h->daddr, &ipv6h->saddr)) {
+ t->dev->stats.rx_dropped++;
+ rcu_read_unlock();
goto discard;
}
- secpath_reset(skb);
skb->mac_header = skb->network_header;
skb_reset_network_header(skb);
skb->protocol = htons(protocol);
- 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;
- nf_reset(skb);
- dscp_ecn_decapsulate(t, ipv6h, skb);
+ __skb_tunnel_rx(skb, t->dev, t->net);
+
+ err = dscp_ecn_decapsulate(t, ipv6h, skb);
+ if (unlikely(err)) {
+ if (log_ecn_error)
+ net_info_ratelimited("non-ECT from %pI6 with dsfield=%#x\n",
+ &ipv6h->saddr,
+ ipv6_get_dsfield(ipv6h));
+ if (err > 1) {
+ ++t->dev->stats.rx_frame_errors;
+ ++t->dev->stats.rx_errors;
+ rcu_read_unlock();
+ goto discard;
+ }
+ }
+
+ 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);
- t->stat.rx_packets++;
- t->stat.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:
@@ -772,40 +894,40 @@ static void init_tel_txopt(struct ipv6_tel_txoption *opt, __u8 encap_limit)
* 0 else
**/
-static inline int
-ip6_tnl_addr_conflict(struct ip6_tnl *t, struct ipv6hdr *hdr)
+static inline bool
+ip6_tnl_addr_conflict(const struct ip6_tnl *t, const struct ipv6hdr *hdr)
{
return ipv6_addr_equal(&t->parms.raddr, &hdr->saddr);
}
-static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
+int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
{
- struct ip6_tnl_parm *p = &t->parms;
+ struct __ip6_tnl_parm *p = &t->parms;
int ret = 0;
+ struct net *net = t->net;
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)))
- printk(KERN_WARNING
- "%s xmit: Local address not yet configured!\n",
- p->name);
+ if (unlikely(!ipv6_chk_addr(net, &p->laddr, ldev, 0)))
+ pr_warn("%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)))
- printk(KERN_WARNING
- "%s xmit: Routing loop! "
- "Remote address found on this node!\n",
- p->name);
+ unlikely(ipv6_chk_addr(net, &p->raddr, NULL, 0)))
+ pr_warn("%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;
}
+EXPORT_SYMBOL_GPL(ip6_tnl_xmit_ctl);
+
/**
* ip6_tnl_xmit2 - encapsulate packet and send
* @skb: the outgoing socket buffer
@@ -828,39 +950,44 @@ static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
static int ip6_tnl_xmit2(struct sk_buff *skb,
struct net_device *dev,
__u8 dsfield,
- struct flowi *fl,
+ struct flowi6 *fl6,
int encap_limit,
__u32 *pmtu)
{
struct ip6_tnl *t = netdev_priv(dev);
- struct net_device_stats *stats = &t->stat;
+ struct net *net = t->net;
+ struct net_device_stats *stats = &t->dev->stats;
struct ipv6hdr *ipv6h = ipv6_hdr(skb);
struct ipv6_tel_txoption opt;
- struct dst_entry *dst;
+ struct dst_entry *dst = NULL, *ndst = NULL;
struct net_device *tdev;
int mtu;
unsigned int max_headroom = sizeof(struct ipv6hdr);
u8 proto;
int err = -1;
- int pkt_len;
- if ((dst = ip6_tnl_dst_check(t)) != NULL)
- dst_hold(dst);
- else {
- dst = ip6_route_output(NULL, fl);
+ if (!fl6->flowi6_mark)
+ dst = ip6_tnl_dst_check(t);
+ if (!dst) {
+ ndst = ip6_route_output(net, NULL, fl6);
- if (dst->error || xfrm_lookup(&dst, fl, NULL, 0) < 0)
+ if (ndst->error)
goto tx_err_link_failure;
+ ndst = xfrm_lookup(net, ndst, flowi6_to_flowi(fl6), NULL, 0);
+ if (IS_ERR(ndst)) {
+ err = PTR_ERR(ndst);
+ ndst = NULL;
+ goto tx_err_link_failure;
+ }
+ dst = ndst;
}
tdev = dst->dev;
if (tdev == dev) {
stats->collisions++;
- if (net_ratelimit())
- printk(KERN_WARNING
- "%s: Local routing loop detected!\n",
- t->parms.name);
+ net_warn_ratelimited("%s: Local routing loop detected!\n",
+ t->parms.name);
goto tx_err_dst_release;
}
mtu = dst_mtu(dst) - sizeof (*ipv6h);
@@ -870,14 +997,16 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
}
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), NULL, skb, mtu);
if (skb->len > mtu) {
*pmtu = mtu;
err = -EMSGSIZE;
goto tx_err_dst_release;
}
+ skb_scrub_packet(skb, !net_eq(t->net, dev_net(dev)));
+
/*
* Okay, now see if we can stuff it in the buffer as-is.
*/
@@ -892,47 +1021,45 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
if (skb->sk)
skb_set_owner_w(new_skb, skb->sk);
- kfree_skb(skb);
+ consume_skb(skb);
skb = new_skb;
}
- dst_release(skb->dst);
- skb->dst = dst_clone(dst);
-
+ if (fl6->flowi6_mark) {
+ skb_dst_set(skb, dst);
+ ndst = NULL;
+ } else {
+ skb_dst_set_noref(skb, dst);
+ }
skb->transport_header = skb->network_header;
- proto = fl->proto;
+ proto = fl6->flowi6_proto;
if (encap_limit >= 0) {
init_tel_txopt(&opt, encap_limit);
ipv6_push_nfrag_opts(skb, &opt.ops, &proto, NULL);
}
+
+ if (likely(!skb->encapsulation)) {
+ skb_reset_inner_headers(skb);
+ skb->encapsulation = 1;
+ }
+
skb_push(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb);
ipv6h = ipv6_hdr(skb);
- *(__be32*)ipv6h = fl->fl6_flowlabel | htonl(0x60000000);
- dsfield = INET_ECN_encapsulate(0, dsfield);
- ipv6_change_dsfield(ipv6h, ~INET_ECN_MASK, dsfield);
+ ip6_flow_hdr(ipv6h, INET_ECN_encapsulate(0, dsfield), fl6->flowlabel);
ipv6h->hop_limit = t->parms.hop_limit;
ipv6h->nexthdr = proto;
- ipv6_addr_copy(&ipv6h->saddr, &fl->fl6_src);
- ipv6_addr_copy(&ipv6h->daddr, &fl->fl6_dst);
- nf_reset(skb);
- pkt_len = skb->len;
- err = ip6_local_out(skb);
-
- if (net_xmit_eval(err) == 0) {
- stats->tx_bytes += pkt_len;
- stats->tx_packets++;
- } else {
- stats->tx_errors++;
- stats->tx_aborted_errors++;
- }
- ip6_tnl_dst_store(t, dst);
+ ipv6h->saddr = fl6->saddr;
+ ipv6h->daddr = fl6->daddr;
+ ip6tunnel_xmit(skb, dev);
+ if (ndst)
+ ip6_tnl_dst_store(t, ndst);
return 0;
tx_err_link_failure:
stats->tx_carrier_errors++;
dst_link_failure(skb);
tx_err_dst_release:
- dst_release(dst);
+ dst_release(ndst);
return err;
}
@@ -940,9 +1067,9 @@ static inline int
ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
- struct iphdr *iph = ip_hdr(skb);
+ const struct iphdr *iph = ip_hdr(skb);
int encap_limit = -1;
- struct flowi fl;
+ struct flowi6 fl6;
__u8 dsfield;
__u32 mtu;
int err;
@@ -954,16 +1081,18 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
encap_limit = t->parms.encap_limit;
- memcpy(&fl, &t->fl, sizeof (fl));
- fl.proto = IPPROTO_IPIP;
+ memcpy(&fl6, &t->fl.u.ip6, sizeof (fl6));
+ fl6.flowi6_proto = IPPROTO_IPIP;
dsfield = ipv4_get_dsfield(iph);
- if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
- fl.fl6_flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT)
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
+ fl6.flowlabel |= htonl((__u32)iph->tos << IPV6_TCLASS_SHIFT)
& IPV6_TCLASS_MASK;
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+ fl6.flowi6_mark = skb->mark;
- err = ip6_tnl_xmit2(skb, dev, dsfield, &fl, encap_limit, &mtu);
+ err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu);
if (err != 0) {
/* XXX: send ICMP error even if DF is not set. */
if (err == -EMSGSIZE)
@@ -982,7 +1111,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
struct ipv6hdr *ipv6h = ipv6_hdr(skb);
int encap_limit = -1;
__u16 offset;
- struct flowi fl;
+ struct flowi6 fl6;
__u8 dsfield;
__u32 mtu;
int err;
@@ -991,55 +1120,52 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
!ip6_tnl_xmit_ctl(t) || ip6_tnl_addr_conflict(t, ipv6h))
return -1;
- offset = parse_tlv_tnl_enc_lim(skb, skb_network_header(skb));
+ offset = ip6_tnl_parse_tlv_enc_lim(skb, skb_network_header(skb));
if (offset > 0) {
struct ipv6_tlv_tnl_enc_lim *tel;
tel = (struct ipv6_tlv_tnl_enc_lim *)&skb_network_header(skb)[offset];
if (tel->encap_limit == 0) {
icmpv6_send(skb, ICMPV6_PARAMPROB,
- ICMPV6_HDR_FIELD, offset + 2, skb->dev);
+ ICMPV6_HDR_FIELD, offset + 2);
return -1;
}
encap_limit = tel->encap_limit - 1;
} else if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
encap_limit = t->parms.encap_limit;
- memcpy(&fl, &t->fl, sizeof (fl));
- fl.proto = IPPROTO_IPV6;
+ memcpy(&fl6, &t->fl.u.ip6, sizeof (fl6));
+ fl6.flowi6_proto = IPPROTO_IPV6;
dsfield = ipv6_get_dsfield(ipv6h);
- if ((t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS))
- fl.fl6_flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
- if ((t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL))
- fl.fl6_flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
-
- err = ip6_tnl_xmit2(skb, dev, dsfield, &fl, encap_limit, &mtu);
+ 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 |= ip6_flowlabel(ipv6h);
+ if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+ fl6.flowi6_mark = skb->mark;
+
+ err = ip6_tnl_xmit2(skb, dev, dsfield, &fl6, encap_limit, &mtu);
if (err != 0) {
if (err == -EMSGSIZE)
- icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev);
+ icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
return -1;
}
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:
@@ -1049,57 +1175,37 @@ ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
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;
-}
-
-static void ip6_tnl_set_cap(struct ip6_tnl *t)
-{
- struct ip6_tnl_parm *p = &t->parms;
- int ltype = ipv6_addr_type(&p->laddr);
- int rtype = ipv6_addr_type(&p->raddr);
-
- p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV);
-
- if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
- rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
- !((ltype|rtype) & IPV6_ADDR_LOOPBACK) &&
- (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) {
- if (ltype&IPV6_ADDR_UNICAST)
- p->flags |= IP6_TNL_F_CAP_XMIT;
- if (rtype&IPV6_ADDR_UNICAST)
- p->flags |= IP6_TNL_F_CAP_RCV;
- }
+ return NETDEV_TX_OK;
}
static void ip6_tnl_link_config(struct ip6_tnl *t)
{
struct net_device *dev = t->dev;
- struct ip6_tnl_parm *p = &t->parms;
- struct flowi *fl = &t->fl;
+ struct __ip6_tnl_parm *p = &t->parms;
+ struct flowi6 *fl6 = &t->fl.u.ip6;
- 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);
- ipv6_addr_copy(&fl->fl6_dst, &p->raddr);
- fl->oif = p->link;
- fl->fl6_flowlabel = 0;
+ fl6->saddr = p->laddr;
+ fl6->daddr = p->raddr;
+ fl6->flowi6_oif = p->link;
+ fl6->flowlabel = 0;
if (!(p->flags&IP6_TNL_F_USE_ORIG_TCLASS))
- fl->fl6_flowlabel |= IPV6_TCLASS_MASK & p->flowinfo;
+ fl6->flowlabel |= IPV6_TCLASS_MASK & p->flowinfo;
if (!(p->flags&IP6_TNL_F_USE_ORIG_FLOWLABEL))
- fl->fl6_flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo;
+ fl6->flowlabel |= IPV6_FLOWLABEL_MASK & p->flowinfo;
- ip6_tnl_set_cap(t);
+ p->flags &= ~(IP6_TNL_F_CAP_XMIT|IP6_TNL_F_CAP_RCV|IP6_TNL_F_CAP_PER_PACKET);
+ p->flags |= ip6_tnl_get_cap(t, &p->laddr, &p->raddr);
if (p->flags&IP6_TNL_F_CAP_XMIT && p->flags&IP6_TNL_F_CAP_RCV)
dev->flags |= IFF_POINTOPOINT;
@@ -1112,22 +1218,25 @@ static void ip6_tnl_link_config(struct ip6_tnl *t)
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(t->net,
+ &p->raddr, &p->laddr,
p->link, strict);
if (rt == NULL)
return;
- if (rt->rt6i_dev) {
- dev->hard_header_len = rt->rt6i_dev->hard_header_len +
+ if (rt->dst.dev) {
+ dev->hard_header_len = rt->dst.dev->hard_header_len +
sizeof (struct ipv6hdr);
- dev->mtu = rt->rt6i_dev->mtu - sizeof (struct ipv6hdr);
+ dev->mtu = rt->dst.dev->mtu - sizeof (struct ipv6hdr);
+ if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
+ dev->mtu-=8;
if (dev->mtu < IPV6_MIN_MTU)
dev->mtu = IPV6_MIN_MTU;
}
- dst_release(&rt->u.dst);
+ ip6_rt_put(rt);
}
}
@@ -1135,17 +1244,16 @@ static void ip6_tnl_link_config(struct ip6_tnl *t)
* 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
**/
static int
-ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p)
+ip6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p)
{
- ipv6_addr_copy(&t->parms.laddr, &p->laddr);
- ipv6_addr_copy(&t->parms.raddr, &p->raddr);
+ t->parms.laddr = p->laddr;
+ t->parms.raddr = p->raddr;
t->parms.flags = p->flags;
t->parms.hop_limit = p->hop_limit;
t->parms.encap_limit = p->encap_limit;
@@ -1157,6 +1265,48 @@ ip6_tnl_change(struct ip6_tnl *t, struct ip6_tnl_parm *p)
return 0;
}
+static int ip6_tnl_update(struct ip6_tnl *t, struct __ip6_tnl_parm *p)
+{
+ struct net *net = t->net;
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ int err;
+
+ ip6_tnl_unlink(ip6n, t);
+ synchronize_net();
+ err = ip6_tnl_change(t, p);
+ ip6_tnl_link(ip6n, t);
+ netdev_state_change(t->dev);
+ return err;
+}
+
+static void
+ip6_tnl_parm_from_user(struct __ip6_tnl_parm *p, const struct ip6_tnl_parm *u)
+{
+ p->laddr = u->laddr;
+ p->raddr = u->raddr;
+ p->flags = u->flags;
+ p->hop_limit = u->hop_limit;
+ p->encap_limit = u->encap_limit;
+ p->flowinfo = u->flowinfo;
+ p->link = u->link;
+ p->proto = u->proto;
+ memcpy(p->name, u->name, sizeof(u->name));
+}
+
+static void
+ip6_tnl_parm_to_user(struct ip6_tnl_parm *u, const struct __ip6_tnl_parm *p)
+{
+ u->laddr = p->laddr;
+ u->raddr = p->raddr;
+ u->flags = p->flags;
+ u->hop_limit = p->hop_limit;
+ u->encap_limit = p->encap_limit;
+ u->flowinfo = p->flowinfo;
+ u->link = p->link;
+ u->proto = p->proto;
+ memcpy(u->name, p->name, sizeof(u->name));
+}
+
/**
* ip6_tnl_ioctl - configure ipv6 tunnels from userspace
* @dev: virtual device associated with tunnel
@@ -1190,20 +1340,26 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int err = 0;
struct ip6_tnl_parm p;
- struct ip6_tnl *t = NULL;
+ struct __ip6_tnl_parm p1;
+ 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) {
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);
+ 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);
- memcpy(&p, &t->parms, sizeof (p));
+ ip6_tnl_parm_to_user(&p, &t->parms);
if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof (p))) {
err = -EFAULT;
}
@@ -1211,7 +1367,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
break;
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
@@ -1220,8 +1376,9 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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) {
+ ip6_tnl_parm_from_user(&p1, &p);
+ t = ip6_tnl_locate(net, &p1, cmd == SIOCADDTUNNEL);
+ if (dev != ip6n->fb_tnl_dev && cmd == SIOCCHGTUNNEL) {
if (t != NULL) {
if (t->dev != dev) {
err = -EEXIST;
@@ -1230,14 +1387,12 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
} else
t = netdev_priv(dev);
- ip6_tnl_unlink(t);
- err = ip6_tnl_change(t, &p);
- ip6_tnl_link(t);
- netdev_state_change(dev);
+ err = ip6_tnl_update(t, &p1);
}
if (t) {
err = 0;
- if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof (p)))
+ ip6_tnl_parm_to_user(&p, &t->parms);
+ if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
err = -EFAULT;
} else
@@ -1245,18 +1400,20 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
break;
case SIOCDELTUNNEL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, 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)
+ ip6_tnl_parm_from_user(&p1, &p);
+ t = ip6_tnl_locate(net, &p1, 0);
+ if (t == NULL)
break;
err = -EPERM;
- if (t->dev == ip6_fb_tnl_dev)
+ if (t->dev == ip6n->fb_tnl_dev)
break;
dev = t->dev;
}
@@ -1270,19 +1427,6 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
}
/**
- * 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
@@ -1295,13 +1439,31 @@ ip6_tnl_get_stats(struct net_device *dev)
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;
}
+
+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,
+ .ndo_get_stats = ip6_get_stats,
+};
+
+
/**
* ip6_tnl_dev_setup - setup virtual tunnel device
* @dev: virtual device associated with tunnel
@@ -1312,18 +1474,23 @@ ip6_tnl_change_mtu(struct net_device *dev, int new_mtu)
static void ip6_tnl_dev_setup(struct net_device *dev)
{
- dev->uninit = ip6_tnl_dev_uninit;
- 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;
+ struct ip6_tnl *t;
+
+ dev->netdev_ops = &ip6_tnl_netdev_ops;
+ dev->destructor = ip6_dev_free;
dev->type = ARPHRD_TUNNEL6;
dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr);
dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr);
+ t = netdev_priv(dev);
+ if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
+ dev->mtu-=8;
dev->flags |= IFF_NOARP;
dev->addr_len = sizeof(struct in6_addr);
+ dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+ /* This perm addr will be used as interface identifier by IPv6 */
+ dev->addr_assign_type = NET_ADDR_RANDOM;
+ eth_random_addr(dev->perm_addr);
}
@@ -1332,12 +1499,17 @@ static void ip6_tnl_dev_setup(struct net_device *dev)
* @dev: virtual device associated with tunnel
**/
-static inline void
+static inline int
ip6_tnl_dev_init_gen(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
+
t->dev = dev;
- strcpy(t->parms.name, dev->name);
+ t->net = dev_net(dev);
+ dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
+ if (!dev->tstats)
+ return -ENOMEM;
+ return 0;
}
/**
@@ -1345,11 +1517,13 @@ ip6_tnl_dev_init_gen(struct net_device *dev)
* @dev: virtual device associated with tunnel
**/
-static int
-ip6_tnl_dev_init(struct net_device *dev)
+static int ip6_tnl_dev_init(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
- ip6_tnl_dev_init_gen(dev);
+ int err = ip6_tnl_dev_init_gen(dev);
+
+ if (err)
+ return err;
ip6_tnl_link_config(t);
return 0;
}
@@ -1361,29 +1535,287 @@ ip6_tnl_dev_init(struct net_device *dev)
* Return: 0
**/
-static int
-ip6_fb_tnl_dev_init(struct net_device *dev)
+static int __net_init ip6_fb_tnl_dev_init(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
- ip6_tnl_dev_init_gen(dev);
+ struct net *net = dev_net(dev);
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ int err = ip6_tnl_dev_init_gen(dev);
+
+ if (err)
+ return err;
+
t->parms.proto = IPPROTO_IPV6;
dev_hold(dev);
- tnls_wc[0] = t;
+
+ ip6_tnl_link_config(t);
+
+ rcu_assign_pointer(ip6n->tnls_wc[0], t);
+ return 0;
+}
+
+static int ip6_tnl_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ u8 proto;
+
+ if (!data || !data[IFLA_IPTUN_PROTO])
+ return 0;
+
+ proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);
+ if (proto != IPPROTO_IPV6 &&
+ proto != IPPROTO_IPIP &&
+ proto != 0)
+ return -EINVAL;
+
return 0;
}
-static struct xfrm6_tunnel ip4ip6_handler = {
+static void ip6_tnl_netlink_parms(struct nlattr *data[],
+ struct __ip6_tnl_parm *parms)
+{
+ memset(parms, 0, sizeof(*parms));
+
+ if (!data)
+ return;
+
+ if (data[IFLA_IPTUN_LINK])
+ parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]);
+
+ if (data[IFLA_IPTUN_LOCAL])
+ nla_memcpy(&parms->laddr, data[IFLA_IPTUN_LOCAL],
+ sizeof(struct in6_addr));
+
+ if (data[IFLA_IPTUN_REMOTE])
+ nla_memcpy(&parms->raddr, data[IFLA_IPTUN_REMOTE],
+ sizeof(struct in6_addr));
+
+ if (data[IFLA_IPTUN_TTL])
+ parms->hop_limit = nla_get_u8(data[IFLA_IPTUN_TTL]);
+
+ if (data[IFLA_IPTUN_ENCAP_LIMIT])
+ parms->encap_limit = nla_get_u8(data[IFLA_IPTUN_ENCAP_LIMIT]);
+
+ if (data[IFLA_IPTUN_FLOWINFO])
+ parms->flowinfo = nla_get_be32(data[IFLA_IPTUN_FLOWINFO]);
+
+ if (data[IFLA_IPTUN_FLAGS])
+ parms->flags = nla_get_u32(data[IFLA_IPTUN_FLAGS]);
+
+ if (data[IFLA_IPTUN_PROTO])
+ parms->proto = nla_get_u8(data[IFLA_IPTUN_PROTO]);
+}
+
+static int ip6_tnl_newlink(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct net *net = dev_net(dev);
+ struct ip6_tnl *nt;
+
+ nt = netdev_priv(dev);
+ ip6_tnl_netlink_parms(data, &nt->parms);
+
+ if (ip6_tnl_locate(net, &nt->parms, 0))
+ return -EEXIST;
+
+ return ip6_tnl_create2(dev);
+}
+
+static int ip6_tnl_changelink(struct net_device *dev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct ip6_tnl *t = netdev_priv(dev);
+ struct __ip6_tnl_parm p;
+ struct net *net = t->net;
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+
+ if (dev == ip6n->fb_tnl_dev)
+ return -EINVAL;
+
+ ip6_tnl_netlink_parms(data, &p);
+
+ t = ip6_tnl_locate(net, &p, 0);
+
+ if (t) {
+ if (t->dev != dev)
+ return -EEXIST;
+ } else
+ t = netdev_priv(dev);
+
+ 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
+ /* IFLA_IPTUN_LINK */
+ nla_total_size(4) +
+ /* IFLA_IPTUN_LOCAL */
+ nla_total_size(sizeof(struct in6_addr)) +
+ /* IFLA_IPTUN_REMOTE */
+ nla_total_size(sizeof(struct in6_addr)) +
+ /* IFLA_IPTUN_TTL */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_ENCAP_LIMIT */
+ nla_total_size(1) +
+ /* IFLA_IPTUN_FLOWINFO */
+ nla_total_size(4) +
+ /* IFLA_IPTUN_FLAGS */
+ nla_total_size(4) +
+ /* IFLA_IPTUN_PROTO */
+ nla_total_size(1) +
+ 0;
+}
+
+static int ip6_tnl_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+ struct ip6_tnl *tunnel = netdev_priv(dev);
+ struct __ip6_tnl_parm *parm = &tunnel->parms;
+
+ if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) ||
+ nla_put(skb, IFLA_IPTUN_LOCAL, 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) ||
+ nla_put_u32(skb, IFLA_IPTUN_FLAGS, parm->flags) ||
+ nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->proto))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static const struct nla_policy ip6_tnl_policy[IFLA_IPTUN_MAX + 1] = {
+ [IFLA_IPTUN_LINK] = { .type = NLA_U32 },
+ [IFLA_IPTUN_LOCAL] = { .len = sizeof(struct in6_addr) },
+ [IFLA_IPTUN_REMOTE] = { .len = sizeof(struct in6_addr) },
+ [IFLA_IPTUN_TTL] = { .type = NLA_U8 },
+ [IFLA_IPTUN_ENCAP_LIMIT] = { .type = NLA_U8 },
+ [IFLA_IPTUN_FLOWINFO] = { .type = NLA_U32 },
+ [IFLA_IPTUN_FLAGS] = { .type = NLA_U32 },
+ [IFLA_IPTUN_PROTO] = { .type = NLA_U8 },
+};
+
+static struct rtnl_link_ops ip6_link_ops __read_mostly = {
+ .kind = "ip6tnl",
+ .maxtype = IFLA_IPTUN_MAX,
+ .policy = ip6_tnl_policy,
+ .priv_size = sizeof(struct ip6_tnl),
+ .setup = ip6_tnl_dev_setup,
+ .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,
+};
+
+static struct xfrm6_tunnel ip4ip6_handler __read_mostly = {
.handler = ip4ip6_rcv,
.err_handler = ip4ip6_err,
.priority = 1,
};
-static struct xfrm6_tunnel ip6ip6_handler = {
+static struct xfrm6_tunnel ip6ip6_handler __read_mostly = {
.handler = ip6ip6_rcv,
.err_handler = ip6ip6_err,
.priority = 1,
};
+static void __net_exit ip6_tnl_destroy_tunnels(struct net *net)
+{
+ struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
+ struct net_device *dev, *aux;
+ int h;
+ struct ip6_tnl *t;
+ LIST_HEAD(list);
+
+ for_each_netdev_safe(net, dev, aux)
+ if (dev->rtnl_link_ops == &ip6_link_ops)
+ unregister_netdevice_queue(dev, &list);
+
+ for (h = 0; h < HASH_SIZE; h++) {
+ t = rtnl_dereference(ip6n->tnls_r_l[h]);
+ while (t != NULL) {
+ /* If dev is in the same netns, it has already
+ * been added to the list by the previous loop.
+ */
+ if (!net_eq(dev_net(t->dev), net))
+ unregister_netdevice_queue(t->dev, &list);
+ t = rtnl_dereference(t->next);
+ }
+ }
+
+ 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);
+ struct ip6_tnl *t = NULL;
+ 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);
+ 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.
+ */
+ ip6n->fb_tnl_dev->features |= NETIF_F_NETNS_LOCAL;
+
+ err = ip6_fb_tnl_dev_init(ip6n->fb_tnl_dev);
+ if (err < 0)
+ goto err_register;
+
+ err = register_netdev(ip6n->fb_tnl_dev);
+ if (err < 0)
+ goto err_register;
+
+ t = netdev_priv(ip6n->fb_tnl_dev);
+
+ strcpy(t->parms.name, ip6n->fb_tnl_dev->name);
+ return 0;
+
+err_register:
+ ip6_dev_free(ip6n->fb_tnl_dev);
+err_alloc_dev:
+ return err;
+}
+
+static void __net_exit ip6_tnl_exit_net(struct net *net)
+{
+ rtnl_lock();
+ ip6_tnl_destroy_tunnels(net);
+ 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
*
@@ -1394,68 +1826,51 @@ static int __init ip6_tunnel_init(void)
{
int err;
- if (xfrm6_tunnel_register(&ip4ip6_handler, AF_INET)) {
- printk(KERN_ERR "ip6_tunnel init: can't register ip4ip6\n");
- err = -EAGAIN;
- goto out;
- }
+ err = register_pernet_device(&ip6_tnl_net_ops);
+ if (err < 0)
+ goto out_pernet;
- if (xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6)) {
- printk(KERN_ERR "ip6_tunnel init: can't register ip6ip6\n");
- err = -EAGAIN;
- goto unreg_ip4ip6;
+ err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET);
+ if (err < 0) {
+ pr_err("%s: can't register ip4ip6\n", __func__);
+ goto out_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;
+ err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6);
+ if (err < 0) {
+ pr_err("%s: can't register ip6ip6\n", __func__);
+ goto out_ip6ip6;
}
- ip6_fb_tnl_dev->init = ip6_fb_tnl_dev_init;
+ err = rtnl_link_register(&ip6_link_ops);
+ if (err < 0)
+ goto rtnl_link_failed;
- if ((err = register_netdev(ip6_fb_tnl_dev))) {
- free_netdev(ip6_fb_tnl_dev);
- goto fail;
- }
return 0;
-fail:
+
+rtnl_link_failed:
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
**/
static void __exit ip6_tunnel_cleanup(void)
{
+ rtnl_link_unregister(&ip6_link_ops);
if (xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET))
- printk(KERN_INFO "ip6_tunnel close: can't deregister ip4ip6\n");
+ pr_info("%s: can't deregister ip4ip6\n", __func__);
if (xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6))
- printk(KERN_INFO "ip6_tunnel close: can't deregister ip6ip6\n");
+ pr_info("%s: can't deregister ip6ip6\n", __func__);
- rtnl_lock();
- ip6_tnl_destroy_tunnels();
- rtnl_unlock();
+ unregister_pernet_device(&ip6_tnl_net_ops);
}
module_init(ip6_tunnel_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 19:07:16 +0000