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authorDavid S. Miller <davem@davemloft.net>2012-01-27 15:30:48 -0800
committerDavid S. Miller <davem@davemloft.net>2012-01-27 21:00:08 -0500
commit4991969a1027826c3db19dd3e600e145603e6928 (patch)
tree87e2986e22f64b746e550ba377a2b59f20b199a9
parent5339ab8b1dd82f14df168fb9bf59449f3e24b03d (diff)
downloadlinux-4991969a1027826c3db19dd3e600e145603e6928.tar.bz2
ipv6: Remove neigh argument from ndisc_send_redirect()
Instead, compute it as-needed inside of that function using dst_neigh_lookup(). Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/ndisc.h1
-rw-r--r--net/ipv6/ip6_output.c2
-rw-r--r--net/ipv6/ndisc.c12
3 files changed, 11 insertions, 4 deletions
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index e3133c23980e..6f9c25a76cd1 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -133,7 +133,6 @@ extern void ndisc_send_rs(struct net_device *dev,
const struct in6_addr *daddr);
extern void ndisc_send_redirect(struct sk_buff *skb,
- struct neighbour *neigh,
const struct in6_addr *target);
extern int ndisc_mc_map(const struct in6_addr *addr, char *buf,
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index d97e07183ce9..604809b89b67 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -486,7 +486,7 @@ int ip6_forward(struct sk_buff *skb)
and by source (inside ndisc_send_redirect)
*/
if (inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ))
- ndisc_send_redirect(skb, n, target);
+ ndisc_send_redirect(skb, target);
} else {
int addrtype = ipv6_addr_type(&hdr->saddr);
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index c574ebce3fb5..8d817018c188 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1512,8 +1512,7 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
}
}
-void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
- const struct in6_addr *target)
+void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
{
struct net_device *dev = skb->dev;
struct net *net = dev_net(dev);
@@ -1571,6 +1570,13 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
goto release;
if (dev->addr_len) {
+ struct neighbour *neigh = dst_neigh_lookup(skb_dst(skb), target);
+ if (!neigh) {
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 Redirect: no neigh for target address\n");
+ goto release;
+ }
+
read_lock_bh(&neigh->lock);
if (neigh->nud_state & NUD_VALID) {
memcpy(ha_buf, neigh->ha, dev->addr_len);
@@ -1579,6 +1585,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
len += ndisc_opt_addr_space(dev);
} else
read_unlock_bh(&neigh->lock);
+
+ neigh_release(neigh);
}
rd_len = min_t(unsigned int,