X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=net%2Fipv6%2Fndisc.c;h=39836dafa931acdb27ad7bcbb7b3e1a6dedcc7ff;hp=0cb78d7ddaf5f74237bd6f9e871ae255e9175072;hb=2491f0184830c5f1e1c794283177179937def4b7;hpb=10ee08b7570dde2bac77d3f96eca2ce630a32b49

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0cb78d7ddaf5..39836dafa931 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -446,8 +446,9 @@ struct sk_buff *ndisc_build_skb(struct net_device *dev,
 	struct sock *sk = net->ipv6.ndisc_sk;
 	struct sk_buff *skb;
 	struct icmp6hdr *hdr;
+	int hlen = LL_RESERVED_SPACE(dev);
+	int tlen = dev->needed_tailroom;
 	int len;
-	int err;
 	u8 *opt;
 
 	if (!dev->addr_len)
@@ -457,18 +458,16 @@ struct sk_buff *ndisc_build_skb(struct net_device *dev,
 	if (llinfo)
 		len += ndisc_opt_addr_space(dev);
 
-	skb = sock_alloc_send_skb(sk,
-				  (MAX_HEADER + sizeof(struct ipv6hdr) +
-				   len + LL_ALLOCATED_SPACE(dev)),
-				  1, &err);
+	skb = alloc_skb((MAX_HEADER + sizeof(struct ipv6hdr) +
+			 len + hlen + tlen), GFP_ATOMIC);
 	if (!skb) {
 		ND_PRINTK0(KERN_ERR
-			   "ICMPv6 ND: %s() failed to allocate an skb, err=%d.\n",
-			   __func__, err);
+			   "ICMPv6 ND: %s() failed to allocate an skb.\n",
+			   __func__);
 		return NULL;
 	}
 
-	skb_reserve(skb, LL_RESERVED_SPACE(dev));
+	skb_reserve(skb, hlen);
 	ip6_nd_hdr(sk, skb, dev, saddr, daddr, IPPROTO_ICMPV6, len);
 
 	skb->transport_header = skb->tail;
@@ -492,6 +491,11 @@ struct sk_buff *ndisc_build_skb(struct net_device *dev,
 					   csum_partial(hdr,
 							len, 0));
 
+	/* Manually assign socket ownership as we avoid calling
+	 * sock_alloc_send_pskb() to bypass wmem buffer limits
+	 */
+	skb_set_owner_w(skb, sk);
+
 	return skb;
 }
 
@@ -606,7 +610,7 @@ static void ndisc_send_unsol_na(struct net_device *dev)
 {
 	struct inet6_dev *idev;
 	struct inet6_ifaddr *ifa;
-	struct in6_addr mcaddr;
+	struct in6_addr mcaddr = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
 
 	idev = in6_dev_get(dev);
 	if (!idev)
@@ -614,7 +618,6 @@ static void ndisc_send_unsol_na(struct net_device *dev)
 
 	read_lock_bh(&idev->lock);
 	list_for_each_entry(ifa, &idev->addr_list, if_list) {
-		addrconf_addr_solict_mult(&ifa->addr, &mcaddr);
 		ndisc_send_na(dev, NULL, &mcaddr, &ifa->addr,
 			      /*router=*/ !!idev->cnf.forwarding,
 			      /*solicited=*/ false, /*override=*/ true,
@@ -1274,7 +1277,14 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 		rt->rt6i_expires = jiffies + (HZ * lifetime);
 
 	if (ra_msg->icmph.icmp6_hop_limit) {
-		in6_dev->cnf.hop_limit = ra_msg->icmph.icmp6_hop_limit;
+		/* Only set hop_limit on the interface if it is higher than
+		 * the current hop_limit.
+		 */
+		if (in6_dev->cnf.hop_limit < ra_msg->icmph.icmp6_hop_limit) {
+			in6_dev->cnf.hop_limit = ra_msg->icmph.icmp6_hop_limit;
+		} else {
+			ND_PRINTK2(KERN_WARNING "RA: Got route advertisement with lower hop_limit than current\n");
+		}
 		if (rt)
 			dst_metric_set(&rt->dst, RTAX_HOPLIMIT,
 				       ra_msg->icmph.icmp6_hop_limit);
@@ -1533,6 +1543,7 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 	struct inet6_dev *idev;
 	struct flowi6 fl6;
 	u8 *opt;
+	int hlen, tlen;
 	int rd_len;
 	int err;
 	u8 ha_buf[MAX_ADDR_LEN], *ha = NULL;
@@ -1590,9 +1601,11 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 	rd_len &= ~0x7;
 	len += rd_len;
 
+	hlen = LL_RESERVED_SPACE(dev);
+	tlen = dev->needed_tailroom;
 	buff = sock_alloc_send_skb(sk,
 				   (MAX_HEADER + sizeof(struct ipv6hdr) +
-				    len + LL_ALLOCATED_SPACE(dev)),
+				    len + hlen + tlen),
 				   1, &err);
 	if (buff == NULL) {
 		ND_PRINTK0(KERN_ERR
@@ -1601,7 +1614,7 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 		goto release;
 	}
 
-	skb_reserve(buff, LL_RESERVED_SPACE(dev));
+	skb_reserve(buff, hlen);
 	ip6_nd_hdr(sk, buff, dev, &saddr_buf, &ipv6_hdr(skb)->saddr,
 		   IPPROTO_ICMPV6, len);
 
@@ -1730,11 +1743,11 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event,
 	switch (event) {
 	case NETDEV_CHANGEADDR:
 		neigh_changeaddr(&nd_tbl, dev);
-		fib6_run_gc(~0UL, net);
+		fib6_run_gc(0, net, false);
 		break;
 	case NETDEV_DOWN:
 		neigh_ifdown(&nd_tbl, dev);
-		fib6_run_gc(~0UL, net);
+		fib6_run_gc(0, net, false);
 		break;
 	case NETDEV_NOTIFY_PEERS:
 		ndisc_send_unsol_na(dev);