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authorMax Krummenacher <max.krummenacher@toradex.com>2018-03-13 11:32:58 +0100
committerMax Krummenacher <max.krummenacher@toradex.com>2018-03-13 11:32:58 +0100
commit6fb9f3c8a4992f67dcb3ce413df2e22e96b2d400 (patch)
tree6e3071b2f179a62b027669ac2a238383293bf941 /net/ipv6/ip6_tunnel.c
parenta126a5e5dc2fcc5cb36af14c89b440cc8e3bab30 (diff)
parent8b5ab55d254f36e89b1b53aeac7223d2d102483e (diff)
Merge tag 'v4.4.121' into toradex_vf_4.4-nextColibri-VF_LXDE-Image_2.8b2.97-20180331
This is the 4.4.121 stable release
Diffstat (limited to 'net/ipv6/ip6_tunnel.c')
-rw-r--r--net/ipv6/ip6_tunnel.c148
1 files changed, 23 insertions, 125 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 97cb02dc5f02..946c2d015b94 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -122,97 +122,6 @@ static struct net_device_stats *ip6_get_stats(struct net_device *dev)
return &dev->stats;
}
-/*
- * Locking : hash tables are protected by RCU and RTNL
- */
-
-static void ip6_tnl_per_cpu_dst_set(struct ip6_tnl_dst *idst,
- struct dst_entry *dst)
-{
- write_seqlock_bh(&idst->lock);
- dst_release(rcu_dereference_protected(
- idst->dst,
- lockdep_is_held(&idst->lock.lock)));
- if (dst) {
- dst_hold(dst);
- idst->cookie = rt6_get_cookie((struct rt6_info *)dst);
- } else {
- idst->cookie = 0;
- }
- rcu_assign_pointer(idst->dst, dst);
- write_sequnlock_bh(&idst->lock);
-}
-
-struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t)
-{
- struct ip6_tnl_dst *idst;
- struct dst_entry *dst;
- unsigned int seq;
- u32 cookie;
-
- idst = raw_cpu_ptr(t->dst_cache);
-
- rcu_read_lock();
- do {
- seq = read_seqbegin(&idst->lock);
- dst = rcu_dereference(idst->dst);
- cookie = idst->cookie;
- } while (read_seqretry(&idst->lock, seq));
-
- if (dst && !atomic_inc_not_zero(&dst->__refcnt))
- dst = NULL;
- rcu_read_unlock();
-
- if (dst && dst->obsolete && !dst->ops->check(dst, cookie)) {
- ip6_tnl_per_cpu_dst_set(idst, NULL);
- dst_release(dst);
- dst = NULL;
- }
- return dst;
-}
-EXPORT_SYMBOL_GPL(ip6_tnl_dst_get);
-
-void ip6_tnl_dst_reset(struct ip6_tnl *t)
-{
- int i;
-
- for_each_possible_cpu(i)
- ip6_tnl_per_cpu_dst_set(per_cpu_ptr(t->dst_cache, i), NULL);
-}
-EXPORT_SYMBOL_GPL(ip6_tnl_dst_reset);
-
-void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst)
-{
- ip6_tnl_per_cpu_dst_set(raw_cpu_ptr(t->dst_cache), dst);
-
-}
-EXPORT_SYMBOL_GPL(ip6_tnl_dst_set);
-
-void ip6_tnl_dst_destroy(struct ip6_tnl *t)
-{
- if (!t->dst_cache)
- return;
-
- ip6_tnl_dst_reset(t);
- free_percpu(t->dst_cache);
-}
-EXPORT_SYMBOL_GPL(ip6_tnl_dst_destroy);
-
-int ip6_tnl_dst_init(struct ip6_tnl *t)
-{
- int i;
-
- t->dst_cache = alloc_percpu(struct ip6_tnl_dst);
- if (!t->dst_cache)
- return -ENOMEM;
-
- for_each_possible_cpu(i)
- seqlock_init(&per_cpu_ptr(t->dst_cache, i)->lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(ip6_tnl_dst_init);
-
/**
* ip6_tnl_lookup - fetch tunnel matching the end-point addresses
* @remote: the address of the tunnel exit-point
@@ -331,7 +240,7 @@ static void ip6_dev_free(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
- ip6_tnl_dst_destroy(t);
+ dst_cache_destroy(&t->dst_cache);
free_percpu(dev->tstats);
free_netdev(dev);
}
@@ -464,7 +373,7 @@ ip6_tnl_dev_uninit(struct net_device *dev)
RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL);
else
ip6_tnl_unlink(ip6n, t);
- ip6_tnl_dst_reset(t);
+ dst_cache_reset(&t->dst_cache);
dev_put(dev);
}
@@ -1053,7 +962,6 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
struct ipv6_tel_txoption opt;
struct dst_entry *dst = NULL, *ndst = NULL;
struct net_device *tdev;
- bool use_cache = false;
int mtu;
unsigned int max_headroom = sizeof(struct ipv6hdr);
u8 proto;
@@ -1061,38 +969,28 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
/* NBMA tunnel */
if (ipv6_addr_any(&t->parms.raddr)) {
- if (skb->protocol == htons(ETH_P_IPV6)) {
- struct in6_addr *addr6;
- struct neighbour *neigh;
- int addr_type;
-
- if (!skb_dst(skb))
- goto tx_err_link_failure;
+ struct in6_addr *addr6;
+ struct neighbour *neigh;
+ int addr_type;
- neigh = dst_neigh_lookup(skb_dst(skb),
- &ipv6_hdr(skb)->daddr);
- if (!neigh)
- goto tx_err_link_failure;
+ if (!skb_dst(skb))
+ goto tx_err_link_failure;
- addr6 = (struct in6_addr *)&neigh->primary_key;
- addr_type = ipv6_addr_type(addr6);
+ neigh = dst_neigh_lookup(skb_dst(skb),
+ &ipv6_hdr(skb)->daddr);
+ if (!neigh)
+ goto tx_err_link_failure;
- if (addr_type == IPV6_ADDR_ANY)
- addr6 = &ipv6_hdr(skb)->daddr;
+ addr6 = (struct in6_addr *)&neigh->primary_key;
+ addr_type = ipv6_addr_type(addr6);
- memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));
- neigh_release(neigh);
- }
- } else if (!(t->parms.flags &
- (IP6_TNL_F_USE_ORIG_TCLASS | IP6_TNL_F_USE_ORIG_FWMARK))) {
- /* enable the cache only only if the routing decision does
- * not depend on the current inner header value
- */
- use_cache = true;
- }
+ if (addr_type == IPV6_ADDR_ANY)
+ addr6 = &ipv6_hdr(skb)->daddr;
- if (use_cache)
- dst = ip6_tnl_dst_get(t);
+ memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));
+ neigh_release(neigh);
+ } else if (!fl6->flowi6_mark)
+ dst = dst_cache_get(&t->dst_cache);
if (!ip6_tnl_xmit_ctl(t, &fl6->saddr, &fl6->daddr))
goto tx_err_link_failure;
@@ -1155,8 +1053,8 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
skb = new_skb;
}
- if (use_cache && ndst)
- ip6_tnl_dst_set(t, ndst);
+ if (!fl6->flowi6_mark && ndst)
+ dst_cache_set_ip6(&t->dst_cache, ndst, &fl6->saddr);
skb_dst_set(skb, dst);
skb->transport_header = skb->network_header;
@@ -1391,7 +1289,7 @@ ip6_tnl_change(struct ip6_tnl *t, const struct __ip6_tnl_parm *p)
t->parms.flowinfo = p->flowinfo;
t->parms.link = p->link;
t->parms.proto = p->proto;
- ip6_tnl_dst_reset(t);
+ dst_cache_reset(&t->dst_cache);
ip6_tnl_link_config(t);
return 0;
}
@@ -1662,7 +1560,7 @@ ip6_tnl_dev_init_gen(struct net_device *dev)
if (!dev->tstats)
return -ENOMEM;
- ret = ip6_tnl_dst_init(t);
+ ret = dst_cache_init(&t->dst_cache, GFP_KERNEL);
if (ret) {
free_percpu(dev->tstats);
dev->tstats = NULL;