diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 6044ff8..5a20804 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1675,6 +1675,7 @@
 	int ret;
 
 	bn->class_attr_bonding_masters = class_attr_bonding_masters;
+	sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
 
 	ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
 	/*
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 765ab9a..91039ab 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -877,8 +877,21 @@
 		dev_warn(&dev->dev, "Failed to kill VLAN ID %d.\n", vid);
 }
 
+static void virtnet_get_ringparam(struct net_device *dev,
+				struct ethtool_ringparam *ring)
+{
+	struct virtnet_info *vi = netdev_priv(dev);
+
+	ring->rx_max_pending = virtqueue_get_vring_size(vi->rvq);
+	ring->tx_max_pending = virtqueue_get_vring_size(vi->svq);
+	ring->rx_pending = ring->rx_max_pending;
+	ring->tx_pending = ring->tx_max_pending;
+
+}
+
 static const struct ethtool_ops virtnet_ethtool_ops = {
 	.get_link = ethtool_op_get_link,
+	.get_ringparam = virtnet_get_ringparam,
 };
 
 #define MIN_MTU 68
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 68b9136..4acf888 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -529,4 +529,14 @@
 }
 EXPORT_SYMBOL_GPL(vring_transport_features);
 
+/* return the size of the vring within the virtqueue */
+unsigned int virtqueue_get_vring_size(struct virtqueue *_vq)
+{
+
+	struct vring_virtqueue *vq = to_vvq(_vq);
+
+	return vq->vring.num;
+}
+EXPORT_SYMBOL_GPL(virtqueue_get_vring_size);
+
 MODULE_LICENSE("GPL");
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 7108857..851ebf1 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -61,6 +61,9 @@
  * virtqueue_detach_unused_buf: detach first unused buffer
  * 	vq: the struct virtqueue we're talking about.
  * 	Returns NULL or the "data" token handed to add_buf
+ * virtqueue_get_vring_size: return the size of the virtqueue's vring
+ *	vq: the struct virtqueue containing the vring of interest.
+ *	Returns the size of the vring.
  *
  * Locking rules are straightforward: the driver is responsible for
  * locking.  No two operations may be invoked simultaneously, with the exception
@@ -97,6 +100,8 @@
 
 void *virtqueue_detach_unused_buf(struct virtqueue *vq);
 
+unsigned int virtqueue_get_vring_size(struct virtqueue *vq);
+
 /**
  * virtio_device - representation of a device using virtio
  * @index: unique position on the virtio bus
diff --git a/include/net/inet_ecn.h b/include/net/inet_ecn.h
index 2fa8d13..2fa1469 100644
--- a/include/net/inet_ecn.h
+++ b/include/net/inet_ecn.h
@@ -30,6 +30,14 @@
 	return dsfield & INET_ECN_ECT_0;
 }
 
+/*
+ * RFC 3168 9.1.1
+ *  The full-functionality option for ECN encapsulation is to copy the
+ *  ECN codepoint of the inside header to the outside header on
+ *  encapsulation if the inside header is not-ECT or ECT, and to set the
+ *  ECN codepoint of the outside header to ECT(0) if the ECN codepoint of
+ *  the inside header is CE.
+ */
 static inline __u8 INET_ECN_encapsulate(__u8 outer, __u8 inner)
 {
 	outer &= ~INET_ECN_MASK;
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index f1a7709..180231c 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -126,7 +126,8 @@
 	/* And these are ours. */
 	unsigned int		tw_ipv6only     : 1,
 				tw_transparent  : 1,
-				tw_pad		: 14,	/* 14 bits hole */
+				tw_pad		: 6,	/* 6 bits hole */
+				tw_tos		: 8,
 				tw_ipv6_offset  : 16;
 	kmemcheck_bitfield_end(flags);
 	unsigned long		tw_ttd;
diff --git a/include/net/ip.h b/include/net/ip.h
index c7e066a..eca0ef7 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -165,6 +165,7 @@
 	int	    csumoffset; /* u16 offset of csum in iov[0].iov_base */
 				/* -1 if not needed */ 
 	int	    bound_dev_if;
+	u8  	    tos;
 }; 
 
 #define IP_REPLY_ARG_NOSRCCHECK 1
@@ -175,7 +176,7 @@
 }
 
 void ip_send_reply(struct sock *sk, struct sk_buff *skb, __be32 daddr,
-		   struct ip_reply_arg *arg, unsigned int len);
+		   const struct ip_reply_arg *arg, unsigned int len);
 
 struct ipv4_config {
 	int	log_martians;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 3edef0b..ed0e814 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1185,8 +1185,9 @@
 
 /* - functions */
 extern int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
-			       struct sock *sk, struct request_sock *req,
-			       struct sk_buff *skb);
+			       const struct sock *sk,
+			       const struct request_sock *req,
+			       const struct sk_buff *skb);
 extern struct tcp_md5sig_key * tcp_v4_md5_lookup(struct sock *sk,
 						 struct sock *addr_sk);
 extern int tcp_v4_md5_do_add(struct sock *sk, __be32 addr, u8 *newkey,
@@ -1209,7 +1210,7 @@
 extern struct tcp_md5sig_pool	*tcp_get_md5sig_pool(void);
 extern void tcp_put_md5sig_pool(void);
 
-extern int tcp_md5_hash_header(struct tcp_md5sig_pool *, struct tcphdr *);
+extern int tcp_md5_hash_header(struct tcp_md5sig_pool *, const struct tcphdr *);
 extern int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *, const struct sk_buff *,
 				 unsigned header_len);
 extern int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
@@ -1448,9 +1449,9 @@
 						struct sock *addr_sk);
 	int			(*calc_md5_hash) (char *location,
 						  struct tcp_md5sig_key *md5,
-						  struct sock *sk,
-						  struct request_sock *req,
-						  struct sk_buff *skb);
+						  const struct sock *sk,
+						  const struct request_sock *req,
+						  const struct sk_buff *skb);
 	int			(*md5_add) (struct sock *sk,
 					    struct sock *addr_sk,
 					    u8 *newkey,
@@ -1467,9 +1468,9 @@
 						struct request_sock *req);
 	int			(*calc_md5_hash) (char *location,
 						  struct tcp_md5sig_key *md5,
-						  struct sock *sk,
-						  struct request_sock *req,
-						  struct sk_buff *skb);
+						  const struct sock *sk,
+						  const struct request_sock *req,
+						  const struct sk_buff *skb);
 #endif
 };
 
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 3c8dfa1..44d65d5 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -183,6 +183,7 @@
 		tw->tw_daddr	    = inet->inet_daddr;
 		tw->tw_rcv_saddr    = inet->inet_rcv_saddr;
 		tw->tw_bound_dev_if = sk->sk_bound_dev_if;
+		tw->tw_tos	    = inet->tos;
 		tw->tw_num	    = inet->inet_num;
 		tw->tw_state	    = TCP_TIME_WAIT;
 		tw->tw_substate	    = state;
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index e1374ab..0bc95f3 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1466,7 +1466,7 @@
  *     	structure to pass arguments.
  */
 void ip_send_reply(struct sock *sk, struct sk_buff *skb, __be32 daddr,
-		   struct ip_reply_arg *arg, unsigned int len)
+		   const struct ip_reply_arg *arg, unsigned int len)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct ip_options_data replyopts;
@@ -1489,7 +1489,7 @@
 	}
 
 	flowi4_init_output(&fl4, arg->bound_dev_if, 0,
-			   RT_TOS(ip_hdr(skb)->tos),
+			   RT_TOS(arg->tos),
 			   RT_SCOPE_UNIVERSE, sk->sk_protocol,
 			   ip_reply_arg_flowi_flags(arg),
 			   daddr, rt->rt_spec_dst,
@@ -1506,7 +1506,7 @@
 	   with locally disabled BH and that sk cannot be already spinlocked.
 	 */
 	bh_lock_sock(sk);
-	inet->tos = ip_hdr(skb)->tos;
+	inet->tos = arg->tos;
 	sk->sk_priority = skb->priority;
 	sk->sk_protocol = ip_hdr(skb)->protocol;
 	sk->sk_bound_dev_if = arg->bound_dev_if;
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index f0dc3ad..09ff51b 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -33,6 +33,7 @@
 #include <linux/netfilter.h>
 #include <linux/route.h>
 #include <linux/mroute.h>
+#include <net/inet_ecn.h>
 #include <net/route.h>
 #include <net/xfrm.h>
 #include <net/compat.h>
@@ -578,8 +579,8 @@
 		break;
 	case IP_TOS:	/* This sets both TOS and Precedence */
 		if (sk->sk_type == SOCK_STREAM) {
-			val &= ~3;
-			val |= inet->tos & 3;
+			val &= ~INET_ECN_MASK;
+			val |= inet->tos & INET_ECN_MASK;
 		}
 		if (inet->tos != val) {
 			inet->tos = val;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 704adad..eefc61e 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2994,17 +2994,19 @@
 EXPORT_SYMBOL(tcp_put_md5sig_pool);
 
 int tcp_md5_hash_header(struct tcp_md5sig_pool *hp,
-			struct tcphdr *th)
+			const struct tcphdr *th)
 {
 	struct scatterlist sg;
+	struct tcphdr hdr;
 	int err;
 
-	__sum16 old_checksum = th->check;
-	th->check = 0;
+	/* We are not allowed to change tcphdr, make a local copy */
+	memcpy(&hdr, th, sizeof(hdr));
+	hdr.check = 0;
+
 	/* options aren't included in the hash */
-	sg_init_one(&sg, th, sizeof(struct tcphdr));
-	err = crypto_hash_update(&hp->md5_desc, &sg, sizeof(struct tcphdr));
-	th->check = old_checksum;
+	sg_init_one(&sg, &hdr, sizeof(hdr));
+	err = crypto_hash_update(&hp->md5_desc, &sg, sizeof(hdr));
 	return err;
 }
 EXPORT_SYMBOL(tcp_md5_hash_header);
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 955c925..0ea10ee 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -92,7 +92,7 @@
 static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk,
 						   __be32 addr);
 static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
-			       __be32 daddr, __be32 saddr, struct tcphdr *th);
+			       __be32 daddr, __be32 saddr, const struct tcphdr *th);
 #else
 static inline
 struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr)
@@ -652,6 +652,7 @@
 	arg.flags = (sk && inet_sk(sk)->transparent) ? IP_REPLY_ARG_NOSRCCHECK : 0;
 
 	net = dev_net(skb_dst(skb)->dev);
+	arg.tos = ip_hdr(skb)->tos;
 	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
 		      &arg, arg.iov[0].iov_len);
 
@@ -666,7 +667,7 @@
 static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
 			    u32 win, u32 ts, int oif,
 			    struct tcp_md5sig_key *key,
-			    int reply_flags)
+			    int reply_flags, u8 tos)
 {
 	const struct tcphdr *th = tcp_hdr(skb);
 	struct {
@@ -726,7 +727,7 @@
 	arg.csumoffset = offsetof(struct tcphdr, check) / 2;
 	if (oif)
 		arg.bound_dev_if = oif;
-
+	arg.tos = tos;
 	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
 		      &arg, arg.iov[0].iov_len);
 
@@ -743,7 +744,8 @@
 			tcptw->tw_ts_recent,
 			tw->tw_bound_dev_if,
 			tcp_twsk_md5_key(tcptw),
-			tw->tw_transparent ? IP_REPLY_ARG_NOSRCCHECK : 0
+			tw->tw_transparent ? IP_REPLY_ARG_NOSRCCHECK : 0,
+			tw->tw_tos
 			);
 
 	inet_twsk_put(tw);
@@ -757,7 +759,8 @@
 			req->ts_recent,
 			0,
 			tcp_v4_md5_do_lookup(sk, ip_hdr(skb)->daddr),
-			inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0);
+			inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0,
+			ip_hdr(skb)->tos);
 }
 
 /*
@@ -1090,7 +1093,7 @@
 }
 
 static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
-			       __be32 daddr, __be32 saddr, struct tcphdr *th)
+			       __be32 daddr, __be32 saddr, const struct tcphdr *th)
 {
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
@@ -1122,12 +1125,12 @@
 }
 
 int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
-			struct sock *sk, struct request_sock *req,
-			struct sk_buff *skb)
+			const struct sock *sk, const struct request_sock *req,
+			const struct sk_buff *skb)
 {
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
-	struct tcphdr *th = tcp_hdr(skb);
+	const struct tcphdr *th = tcp_hdr(skb);
 	__be32 saddr, daddr;
 
 	if (sk) {
@@ -1172,7 +1175,7 @@
 }
 EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
 
-static int tcp_v4_inbound_md5_hash(struct sock *sk, struct sk_buff *skb)
+static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 {
 	/*
 	 * This gets called for each TCP segment that arrives
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index da2ada8..c8683fc 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -761,7 +761,7 @@
 
 static int tcp_v6_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key,
 			       const struct in6_addr *daddr, struct in6_addr *saddr,
-			       struct tcphdr *th)
+			       const struct tcphdr *th)
 {
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
@@ -793,13 +793,14 @@
 }
 
 static int tcp_v6_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
-			       struct sock *sk, struct request_sock *req,
-			       struct sk_buff *skb)
+			       const struct sock *sk,
+			       const struct request_sock *req,
+			       const struct sk_buff *skb)
 {
 	const struct in6_addr *saddr, *daddr;
 	struct tcp_md5sig_pool *hp;
 	struct hash_desc *desc;
-	struct tcphdr *th = tcp_hdr(skb);
+	const struct tcphdr *th = tcp_hdr(skb);
 
 	if (sk) {
 		saddr = &inet6_sk(sk)->saddr;
@@ -842,12 +843,12 @@
 	return 1;
 }
 
-static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
+static int tcp_v6_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
 {
 	const __u8 *hash_location = NULL;
 	struct tcp_md5sig_key *hash_expected;
 	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-	struct tcphdr *th = tcp_hdr(skb);
+	const struct tcphdr *th = tcp_hdr(skb);
 	int genhash;
 	u8 newhash[16];