Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1446 commits) macvlan: fix panic if lowerdev in a bond tg3: Add braces around 5906 workaround. tg3: Fix NETIF_F_LOOPBACK error macvlan: remove one synchronize_rcu() call networking: NET_CLS_ROUTE4 depends on INET irda: Fix error propagation in ircomm_lmp_connect_response() irda: Kill set but unused variable 'bytes' in irlan_check_command_param() irda: Kill set but unused variable 'clen' in ircomm_connect_indication() rxrpc: Fix set but unused variable 'usage' in rxrpc_get_transport() be2net: Kill set but unused variable 'req' in lancer_fw_download() irda: Kill set but unused vars 'saddr' and 'daddr' in irlan_provider_connect_indication() atl1c: atl1c_resume() is only used when CONFIG_PM_SLEEP is defined. rxrpc: Fix set but unused variable 'usage' in rxrpc_get_peer(). rxrpc: Kill set but unused variable 'local' in rxrpc_UDP_error_handler() rxrpc: Kill set but unused variable 'sp' in rxrpc_process_connection() rxrpc: Kill set but unused variable 'sp' in rxrpc_rotate_tx_window() pkt_sched: Kill set but unused variable 'protocol' in tc_classify() isdn: capi: Use pr_debug() instead of ifdefs. tg3: Update version to 3.119 tg3: Apply rx_discards fix to 5719/5720 ... Fix up trivial conflicts in arch/x86/Kconfig and net/mac80211/agg-tx.c as per Davem.
author: Linus Torvalds <torvalds@linux-foundation.org> 2011-05-20 13:43:21 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2011-05-20 13:43:21 -0700
commit: 06f4e926d256d902dd9a53dcb400fd74974ce087 (patch)
tree: 0b438b67f5f0eff6fd617bc497a9dace6164a488 /net/ipv4
parent: 8e7bfcbab3825d1b404d615cb1b54f44ff81f981 (diff)
parent: d93515611bbc70c2fe4db232e5feb448ed8e4cc9 (diff)
download: op-kernel-dev-06f4e926d256d902dd9a53dcb400fd74974ce087.zip
op-kernel-dev-06f4e926d256d902dd9a53dcb400fd74974ce087.tar.gz
39 files changed, 1999 insertions, 830 deletions
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index 0dc772d..f2dc69c 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -11,7 +11,7 @@ obj-y     := route.o inetpeer.o protocol.o \
 	     datagram.o raw.o udp.o udplite.o \
 	     arp.o icmp.o devinet.o af_inet.o  igmp.o \
 	     fib_frontend.o fib_semantics.o fib_trie.o \
-	     inet_fragment.o
+	     inet_fragment.o ping.o
 
 obj-$(CONFIG_SYSCTL) += sysctl_net_ipv4.o
 obj-$(CONFIG_PROC_FS) += proc.o
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 807d83c..cc14631 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -105,6 +105,7 @@
 #include <net/tcp.h>
 #include <net/udp.h>
 #include <net/udplite.h>
+#include <net/ping.h>
 #include <linux/skbuff.h>
 #include <net/sock.h>
 #include <net/raw.h>
@@ -153,7 +154,7 @@ void inet_sock_destruct(struct sock *sk)
 	WARN_ON(sk->sk_wmem_queued);
 	WARN_ON(sk->sk_forward_alloc);
 
-	kfree(inet->opt);
+	kfree(rcu_dereference_protected(inet->inet_opt, 1));
 	dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
 	sk_refcnt_debug_dec(sk);
 }
@@ -1008,6 +1009,14 @@ static struct inet_protosw inetsw_array[] =
 		.flags =      INET_PROTOSW_PERMANENT,
        },
 
+       {
+		.type =       SOCK_DGRAM,
+		.protocol =   IPPROTO_ICMP,
+		.prot =       &ping_prot,
+		.ops =        &inet_dgram_ops,
+		.no_check =   UDP_CSUM_DEFAULT,
+		.flags =      INET_PROTOSW_REUSE,
+       },
 
        {
 	       .type =       SOCK_RAW,
@@ -1103,14 +1112,19 @@ static int inet_sk_reselect_saddr(struct sock *sk)
 	struct inet_sock *inet = inet_sk(sk);
 	__be32 old_saddr = inet->inet_saddr;
 	__be32 daddr = inet->inet_daddr;
+	struct flowi4 *fl4;
 	struct rtable *rt;
 	__be32 new_saddr;
+	struct ip_options_rcu *inet_opt;
 
-	if (inet->opt && inet->opt->srr)
-		daddr = inet->opt->faddr;
+	inet_opt = rcu_dereference_protected(inet->inet_opt,
+					     sock_owned_by_user(sk));
+	if (inet_opt && inet_opt->opt.srr)
+		daddr = inet_opt->opt.faddr;
 
 	/* Query new route. */
-	rt = ip_route_connect(daddr, 0, RT_CONN_FLAGS(sk),
+	fl4 = &inet->cork.fl.u.ip4;
+	rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
 			      sk->sk_bound_dev_if, sk->sk_protocol,
 			      inet->inet_sport, inet->inet_dport, sk, false);
 	if (IS_ERR(rt))
@@ -1118,7 +1132,7 @@ static int inet_sk_reselect_saddr(struct sock *sk)
 
 	sk_setup_caps(sk, &rt->dst);
 
-	new_saddr = rt->rt_src;
+	new_saddr = fl4->saddr;
 
 	if (new_saddr == old_saddr)
 		return 0;
@@ -1147,6 +1161,8 @@ int inet_sk_rebuild_header(struct sock *sk)
 	struct inet_sock *inet = inet_sk(sk);
 	struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
 	__be32 daddr;
+	struct ip_options_rcu *inet_opt;
+	struct flowi4 *fl4;
 	int err;
 
 	/* Route is OK, nothing to do. */
@@ -1154,10 +1170,14 @@ int inet_sk_rebuild_header(struct sock *sk)
 		return 0;
 
 	/* Reroute. */
+	rcu_read_lock();
+	inet_opt = rcu_dereference(inet->inet_opt);
 	daddr = inet->inet_daddr;
-	if (inet->opt && inet->opt->srr)
-		daddr = inet->opt->faddr;
-	rt = ip_route_output_ports(sock_net(sk), sk, daddr, inet->inet_saddr,
+	if (inet_opt && inet_opt->opt.srr)
+		daddr = inet_opt->opt.faddr;
+	rcu_read_unlock();
+	fl4 = &inet->cork.fl.u.ip4;
+	rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr,
 				   inet->inet_dport, inet->inet_sport,
 				   sk->sk_protocol, RT_CONN_FLAGS(sk),
 				   sk->sk_bound_dev_if);
@@ -1186,7 +1206,7 @@ EXPORT_SYMBOL(inet_sk_rebuild_header);
 
 static int inet_gso_send_check(struct sk_buff *skb)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	const struct net_protocol *ops;
 	int proto;
 	int ihl;
@@ -1293,7 +1313,7 @@ static struct sk_buff **inet_gro_receive(struct sk_buff **head,
 	const struct net_protocol *ops;
 	struct sk_buff **pp = NULL;
 	struct sk_buff *p;
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	unsigned int hlen;
 	unsigned int off;
 	unsigned int id;
@@ -1516,6 +1536,7 @@ static const struct net_protocol udp_protocol = {
 
 static const struct net_protocol icmp_protocol = {
 	.handler =	icmp_rcv,
+	.err_handler =	ping_err,
 	.no_policy =	1,
 	.netns_ok =	1,
 };
@@ -1631,6 +1652,10 @@ static int __init inet_init(void)
 	if (rc)
 		goto out_unregister_udp_proto;
 
+	rc = proto_register(&ping_prot, 1);
+	if (rc)
+		goto out_unregister_raw_proto;
+
 	/*
 	 *	Tell SOCKET that we are alive...
 	 */
@@ -1686,6 +1711,8 @@ static int __init inet_init(void)
 	/* Add UDP-Lite (RFC 3828) */
 	udplite4_register();
 
+	ping_init();
+
 	/*
 	 *	Set the ICMP layer up
 	 */
@@ -1716,6 +1743,8 @@ static int __init inet_init(void)
 	rc = 0;
 out:
 	return rc;
+out_unregister_raw_proto:
+	proto_unregister(&raw_prot);
 out_unregister_udp_proto:
 	proto_unregister(&udp_prot);
 out_unregister_tcp_proto:
@@ -1740,11 +1769,15 @@ static int __init ipv4_proc_init(void)
 		goto out_tcp;
 	if (udp4_proc_init())
 		goto out_udp;
+	if (ping_proc_init())
+		goto out_ping;
 	if (ip_misc_proc_init())
 		goto out_misc;
 out:
 	return rc;
 out_misc:
+	ping_proc_exit();
+out_ping:
 	udp4_proc_exit();
 out_udp:
 	tcp4_proc_exit();
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 4286fd3..c1f4154 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -73,7 +73,7 @@ static inline struct scatterlist *ah_req_sg(struct crypto_ahash *ahash,
  * into IP header for icv calculation. Options are already checked
  * for validity, so paranoia is not required. */
 
-static int ip_clear_mutable_options(struct iphdr *iph, __be32 *daddr)
+static int ip_clear_mutable_options(const struct iphdr *iph, __be32 *daddr)
 {
 	unsigned char * optptr = (unsigned char*)(iph+1);
 	int  l = iph->ihl*4 - sizeof(struct iphdr);
@@ -396,7 +396,7 @@ out:
 static void ah4_err(struct sk_buff *skb, u32 info)
 {
 	struct net *net = dev_net(skb->dev);
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	struct ip_auth_hdr *ah = (struct ip_auth_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
 
@@ -404,7 +404,8 @@ static void ah4_err(struct sk_buff *skb, u32 info)
 	    icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 		return;
 
-	x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, ah->spi, IPPROTO_AH, AF_INET);
+	x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
+			      ah->spi, IPPROTO_AH, AF_INET);
 	if (!x)
 		return;
 	printk(KERN_DEBUG "pmtu discovery on SA AH/%08x/%08x\n",
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index a0af7ea..2b3c23c 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1857,6 +1857,11 @@ static int cipso_v4_genopt(unsigned char *buf, u32 buf_len,
 	return CIPSO_V4_HDR_LEN + ret_val;
 }
 
+static void opt_kfree_rcu(struct rcu_head *head)
+{
+	kfree(container_of(head, struct ip_options_rcu, rcu));
+}
+
 /**
  * cipso_v4_sock_setattr - Add a CIPSO option to a socket
  * @sk: the socket
@@ -1879,7 +1884,7 @@ int cipso_v4_sock_setattr(struct sock *sk,
 	unsigned char *buf = NULL;
 	u32 buf_len;
 	u32 opt_len;
-	struct ip_options *opt = NULL;
+	struct ip_options_rcu *old, *opt = NULL;
 	struct inet_sock *sk_inet;
 	struct inet_connection_sock *sk_conn;
 
@@ -1915,22 +1920,25 @@ int cipso_v4_sock_setattr(struct sock *sk,
 		ret_val = -ENOMEM;
 		goto socket_setattr_failure;
 	}
-	memcpy(opt->__data, buf, buf_len);
-	opt->optlen = opt_len;
-	opt->cipso = sizeof(struct iphdr);
+	memcpy(opt->opt.__data, buf, buf_len);
+	opt->opt.optlen = opt_len;
+	opt->opt.cipso = sizeof(struct iphdr);
 	kfree(buf);
 	buf = NULL;
 
 	sk_inet = inet_sk(sk);
+
+	old = rcu_dereference_protected(sk_inet->inet_opt, sock_owned_by_user(sk));
 	if (sk_inet->is_icsk) {
 		sk_conn = inet_csk(sk);
-		if (sk_inet->opt)
-			sk_conn->icsk_ext_hdr_len -= sk_inet->opt->optlen;
-		sk_conn->icsk_ext_hdr_len += opt->optlen;
+		if (old)
+			sk_conn->icsk_ext_hdr_len -= old->opt.optlen;
+		sk_conn->icsk_ext_hdr_len += opt->opt.optlen;
 		sk_conn->icsk_sync_mss(sk, sk_conn->icsk_pmtu_cookie);
 	}
-	opt = xchg(&sk_inet->opt, opt);
-	kfree(opt);
+	rcu_assign_pointer(sk_inet->inet_opt, opt);
+	if (old)
+		call_rcu(&old->rcu, opt_kfree_rcu);
 
 	return 0;
 
@@ -1960,7 +1968,7 @@ int cipso_v4_req_setattr(struct request_sock *req,
 	unsigned char *buf = NULL;
 	u32 buf_len;
 	u32 opt_len;
-	struct ip_options *opt = NULL;
+	struct ip_options_rcu *opt = NULL;
 	struct inet_request_sock *req_inet;
 
 	/* We allocate the maximum CIPSO option size here so we are probably
@@ -1988,15 +1996,16 @@ int cipso_v4_req_setattr(struct request_sock *req,
 		ret_val = -ENOMEM;
 		goto req_setattr_failure;
 	}
-	memcpy(opt->__data, buf, buf_len);
-	opt->optlen = opt_len;
-	opt->cipso = sizeof(struct iphdr);
+	memcpy(opt->opt.__data, buf, buf_len);
+	opt->opt.optlen = opt_len;
+	opt->opt.cipso = sizeof(struct iphdr);
 	kfree(buf);
 	buf = NULL;
 
 	req_inet = inet_rsk(req);
 	opt = xchg(&req_inet->opt, opt);
-	kfree(opt);
+	if (opt)
+		call_rcu(&opt->rcu, opt_kfree_rcu);
 
 	return 0;
 
@@ -2016,34 +2025,34 @@ req_setattr_failure:
  * values on failure.
  *
  */
-static int cipso_v4_delopt(struct ip_options **opt_ptr)
+static int cipso_v4_delopt(struct ip_options_rcu **opt_ptr)
 {
 	int hdr_delta = 0;
-	struct ip_options *opt = *opt_ptr;
+	struct ip_options_rcu *opt = *opt_ptr;
 
-	if (opt->srr || opt->rr || opt->ts || opt->router_alert) {
+	if (opt->opt.srr || opt->opt.rr || opt->opt.ts || opt->opt.router_alert) {
 		u8 cipso_len;
 		u8 cipso_off;
 		unsigned char *cipso_ptr;
 		int iter;
 		int optlen_new;
 
-		cipso_off = opt->cipso - sizeof(struct iphdr);
-		cipso_ptr = &opt->__data[cipso_off];
+		cipso_off = opt->opt.cipso - sizeof(struct iphdr);
+		cipso_ptr = &opt->opt.__data[cipso_off];
 		cipso_len = cipso_ptr[1];
 
-		if (opt->srr > opt->cipso)
-			opt->srr -= cipso_len;
-		if (opt->rr > opt->cipso)
-			opt->rr -= cipso_len;
-		if (opt->ts > opt->cipso)
-			opt->ts -= cipso_len;
-		if (opt->router_alert > opt->cipso)
-			opt->router_alert -= cipso_len;
-		opt->cipso = 0;
+		if (opt->opt.srr > opt->opt.cipso)
+			opt->opt.srr -= cipso_len;
+		if (opt->opt.rr > opt->opt.cipso)
+			opt->opt.rr -= cipso_len;
+		if (opt->opt.ts > opt->opt.cipso)
+			opt->opt.ts -= cipso_len;
+		if (opt->opt.router_alert > opt->opt.cipso)
+			opt->opt.router_alert -= cipso_len;
+		opt->opt.cipso = 0;
 
 		memmove(cipso_ptr, cipso_ptr + cipso_len,
-			opt->optlen - cipso_off - cipso_len);
+			opt->opt.optlen - cipso_off - cipso_len);
 
 		/* determining the new total option length is tricky because of
 		 * the padding necessary, the only thing i can think to do at
@@ -2052,21 +2061,21 @@ static int cipso_v4_delopt(struct ip_options **opt_ptr)
 		 * from there we can determine the new total option length */
 		iter = 0;
 		optlen_new = 0;
-		while (iter < opt->optlen)
-			if (opt->__data[iter] != IPOPT_NOP) {
-				iter += opt->__data[iter + 1];
+		while (iter < opt->opt.optlen)
+			if (opt->opt.__data[iter] != IPOPT_NOP) {
+				iter += opt->opt.__data[iter + 1];
 				optlen_new = iter;
 			} else
 				iter++;
-		hdr_delta = opt->optlen;
-		opt->optlen = (optlen_new + 3) & ~3;
-		hdr_delta -= opt->optlen;
+		hdr_delta = opt->opt.optlen;
+		opt->opt.optlen = (optlen_new + 3) & ~3;
+		hdr_delta -= opt->opt.optlen;
 	} else {
 		/* only the cipso option was present on the socket so we can
 		 * remove the entire option struct */
 		*opt_ptr = NULL;
-		hdr_delta = opt->optlen;
-		kfree(opt);
+		hdr_delta = opt->opt.optlen;
+		call_rcu(&opt->rcu, opt_kfree_rcu);
 	}
 
 	return hdr_delta;
@@ -2083,15 +2092,15 @@ static int cipso_v4_delopt(struct ip_options **opt_ptr)
 void cipso_v4_sock_delattr(struct sock *sk)
 {
 	int hdr_delta;
-	struct ip_options *opt;
+	struct ip_options_rcu *opt;
 	struct inet_sock *sk_inet;
 
 	sk_inet = inet_sk(sk);
-	opt = sk_inet->opt;
-	if (opt == NULL || opt->cipso == 0)
+	opt = rcu_dereference_protected(sk_inet->inet_opt, 1);
+	if (opt == NULL || opt->opt.cipso == 0)
 		return;
 
-	hdr_delta = cipso_v4_delopt(&sk_inet->opt);
+	hdr_delta = cipso_v4_delopt(&sk_inet->inet_opt);
 	if (sk_inet->is_icsk && hdr_delta > 0) {
 		struct inet_connection_sock *sk_conn = inet_csk(sk);
 		sk_conn->icsk_ext_hdr_len -= hdr_delta;
@@ -2109,12 +2118,12 @@ void cipso_v4_sock_delattr(struct sock *sk)
  */
 void cipso_v4_req_delattr(struct request_sock *req)
 {
-	struct ip_options *opt;
+	struct ip_options_rcu *opt;
 	struct inet_request_sock *req_inet;
 
 	req_inet = inet_rsk(req);
 	opt = req_inet->opt;
-	if (opt == NULL || opt->cipso == 0)
+	if (opt == NULL || opt->opt.cipso == 0)
 		return;
 
 	cipso_v4_delopt(&req_inet->opt);
@@ -2184,14 +2193,18 @@ getattr_return:
  */
 int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
 {
-	struct ip_options *opt;
+	struct ip_options_rcu *opt;
+	int res = -ENOMSG;
 
-	opt = inet_sk(sk)->opt;
-	if (opt == NULL || opt->cipso == 0)
-		return -ENOMSG;
-
-	return cipso_v4_getattr(opt->__data + opt->cipso - sizeof(struct iphdr),
-				secattr);
+	rcu_read_lock();
+	opt = rcu_dereference(inet_sk(sk)->inet_opt);
+	if (opt && opt->opt.cipso)
+		res = cipso_v4_getattr(opt->opt.__data +
+						opt->opt.cipso -
+						sizeof(struct iphdr),
+				       secattr);
+	rcu_read_unlock();
+	return res;
 }
 
 /**
diff --git a/net/ipv4/datagram.c b/net/ipv4/datagram.c
index 85bd24c..424fafb 100644
--- a/net/ipv4/datagram.c
+++ b/net/ipv4/datagram.c
@@ -24,6 +24,7 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct sockaddr_in *usin = (struct sockaddr_in *) uaddr;
+	struct flowi4 *fl4;
 	struct rtable *rt;
 	__be32 saddr;
 	int oif;
@@ -38,6 +39,8 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 
 	sk_dst_reset(sk);
 
+	lock_sock(sk);
+
 	oif = sk->sk_bound_dev_if;
 	saddr = inet->inet_saddr;
 	if (ipv4_is_multicast(usin->sin_addr.s_addr)) {
@@ -46,7 +49,8 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		if (!saddr)
 			saddr = inet->mc_addr;
 	}
-	rt = ip_route_connect(usin->sin_addr.s_addr, saddr,
+	fl4 = &inet->cork.fl.u.ip4;
+	rt = ip_route_connect(fl4, usin->sin_addr.s_addr, saddr,
 			      RT_CONN_FLAGS(sk), oif,
 			      sk->sk_protocol,
 			      inet->inet_sport, usin->sin_port, sk, true);
@@ -54,26 +58,30 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		err = PTR_ERR(rt);
 		if (err == -ENETUNREACH)
 			IP_INC_STATS_BH(sock_net(sk), IPSTATS_MIB_OUTNOROUTES);
-		return err;
+		goto out;
 	}
 
 	if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) {
 		ip_rt_put(rt);
-		return -EACCES;
+		err = -EACCES;
+		goto out;
 	}
 	if (!inet->inet_saddr)
-		inet->inet_saddr = rt->rt_src;	/* Update source address */
+		inet->inet_saddr = fl4->saddr;	/* Update source address */
 	if (!inet->inet_rcv_saddr) {
-		inet->inet_rcv_saddr = rt->rt_src;
+		inet->inet_rcv_saddr = fl4->saddr;
 		if (sk->sk_prot->rehash)
 			sk->sk_prot->rehash(sk);
 	}
-	inet->inet_daddr = rt->rt_dst;
+	inet->inet_daddr = fl4->daddr;
 	inet->inet_dport = usin->sin_port;
 	sk->sk_state = TCP_ESTABLISHED;
 	inet->inet_id = jiffies;
 
 	sk_dst_set(sk, &rt->dst);
-	return 0;
+	err = 0;
+out:
+	release_sock(sk);
+	return err;
 }
 EXPORT_SYMBOL(ip4_datagram_connect);
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index cd9ca08..0d4a184 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1369,7 +1369,7 @@ errout:
 
 static size_t inet_get_link_af_size(const struct net_device *dev)
 {
-	struct in_device *in_dev = __in_dev_get_rtnl(dev);
+	struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr);
 
 	if (!in_dev)
 		return 0;
@@ -1379,7 +1379,7 @@ static size_t inet_get_link_af_size(const struct net_device *dev)
 
 static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
 {
-	struct in_device *in_dev = __in_dev_get_rtnl(dev);
+	struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr);
 	struct nlattr *nla;
 	int i;
 
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 03f994b..a5b4134 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -276,7 +276,7 @@ error:
 
 static int esp_input_done2(struct sk_buff *skb, int err)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	struct xfrm_state *x = xfrm_input_state(skb);
 	struct esp_data *esp = x->data;
 	struct crypto_aead *aead = esp->aead;
@@ -484,7 +484,7 @@ static u32 esp4_get_mtu(struct xfrm_state *x, int mtu)
 static void esp4_err(struct sk_buff *skb, u32 info)
 {
 	struct net *net = dev_net(skb->dev);
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
 
@@ -492,7 +492,8 @@ static void esp4_err(struct sk_buff *skb, u32 info)
 	    icmp_hdr(skb)->code != ICMP_FRAG_NEEDED)
 		return;
 
-	x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET);
+	x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
+			      esph->spi, IPPROTO_ESP, AF_INET);
 	if (!x)
 		return;
 	NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n",
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 4510883..2252471 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -44,6 +44,7 @@
 #include <net/arp.h>
 #include <net/ip_fib.h>
 #include <net/rtnetlink.h>
+#include <net/xfrm.h>
 
 #ifndef CONFIG_IP_MULTIPLE_TABLES
 
@@ -188,9 +189,9 @@ EXPORT_SYMBOL(inet_dev_addr_type);
  * - check, that packet arrived from expected physical interface.
  * called with rcu_read_lock()
  */
-int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif,
-			struct net_device *dev, __be32 *spec_dst,
-			u32 *itag, u32 mark)
+int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, u8 tos,
+			int oif, struct net_device *dev, __be32 *spec_dst,
+			u32 *itag)
 {
 	struct in_device *in_dev;
 	struct flowi4 fl4;
@@ -202,7 +203,6 @@ int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif,
 
 	fl4.flowi4_oif = 0;
 	fl4.flowi4_iif = oif;
-	fl4.flowi4_mark = mark;
 	fl4.daddr = src;
 	fl4.saddr = dst;
 	fl4.flowi4_tos = tos;
@@ -212,10 +212,12 @@ int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif,
 	in_dev = __in_dev_get_rcu(dev);
 	if (in_dev) {
 		no_addr = in_dev->ifa_list == NULL;
-		rpf = IN_DEV_RPFILTER(in_dev);
+
+		/* Ignore rp_filter for packets protected by IPsec. */
+		rpf = secpath_exists(skb) ? 0 : IN_DEV_RPFILTER(in_dev);
+
 		accept_local = IN_DEV_ACCEPT_LOCAL(in_dev);
-		if (mark && !IN_DEV_SRC_VMARK(in_dev))
-			fl4.flowi4_mark = 0;
+		fl4.flowi4_mark = IN_DEV_SRC_VMARK(in_dev) ? skb->mark : 0;
 	}
 
 	if (in_dev == NULL)
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 11d4d28..c779ce9 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -126,7 +126,7 @@ struct tnode {
 		struct work_struct work;
 		struct tnode *tnode_free;
 	};
-	struct rt_trie_node *child[0];
+	struct rt_trie_node __rcu *child[0];
 };
 
 #ifdef CONFIG_IP_FIB_TRIE_STATS
@@ -151,7 +151,7 @@ struct trie_stat {
 };
 
 struct trie {
-	struct rt_trie_node *trie;
+	struct rt_trie_node __rcu *trie;
 #ifdef CONFIG_IP_FIB_TRIE_STATS
 	struct trie_use_stats stats;
 #endif
@@ -177,16 +177,29 @@ static const int sync_pages = 128;
 static struct kmem_cache *fn_alias_kmem __read_mostly;
 static struct kmem_cache *trie_leaf_kmem __read_mostly;
 
-static inline struct tnode *node_parent(struct rt_trie_node *node)
+/*
+ * caller must hold RTNL
+ */
+static inline struct tnode *node_parent(const struct rt_trie_node *node)
 {
-	return (struct tnode *)(node->parent & ~NODE_TYPE_MASK);
+	unsigned long parent;
+
+	parent = rcu_dereference_index_check(node->parent, lockdep_rtnl_is_held());
+
+	return (struct tnode *)(parent & ~NODE_TYPE_MASK);
 }
 
-static inline struct tnode *node_parent_rcu(struct rt_trie_node *node)
+/*
+ * caller must hold RCU read lock or RTNL
+ */
+static inline struct tnode *node_parent_rcu(const struct rt_trie_node *node)
 {
-	struct tnode *ret = node_parent(node);
+	unsigned long parent;
+
+	parent = rcu_dereference_index_check(node->parent, rcu_read_lock_held() ||
+							   lockdep_rtnl_is_held());
 
-	return rcu_dereference_rtnl(ret);
+	return (struct tnode *)(parent & ~NODE_TYPE_MASK);
 }
 
 /* Same as rcu_assign_pointer
@@ -198,18 +211,24 @@ static inline void node_set_parent(struct rt_trie_node *node, struct tnode *ptr)
 	node->parent = (unsigned long)ptr | NODE_TYPE(node);
 }
 
-static inline struct rt_trie_node *tnode_get_child(struct tnode *tn, unsigned int i)
+/*
+ * caller must hold RTNL
+ */
+static inline struct rt_trie_node *tnode_get_child(const struct tnode *tn, unsigned int i)
 {
 	BUG_ON(i >= 1U << tn->bits);
 
-	return tn->child[i];
+	return rtnl_dereference(tn->child[i]);
 }
 
-static inline struct rt_trie_node *tnode_get_child_rcu(struct tnode *tn, unsigned int i)
+/*
+ * caller must hold RCU read lock or RTNL
+ */
+static inline struct rt_trie_node *tnode_get_child_rcu(const struct tnode *tn, unsigned int i)
 {
-	struct rt_trie_node *ret = tnode_get_child(tn, i);
+	BUG_ON(i >= 1U << tn->bits);
 
-	return rcu_dereference_rtnl(ret);
+	return rcu_dereference_rtnl(tn->child[i]);
 }
 
 static inline int tnode_child_length(const struct tnode *tn)
@@ -482,7 +501,7 @@ static inline void put_child(struct trie *t, struct tnode *tn, int i,
 static void tnode_put_child_reorg(struct tnode *tn, int i, struct rt_trie_node *n,
 				  int wasfull)
 {
-	struct rt_trie_node *chi = tn->child[i];
+	struct rt_trie_node *chi = rtnl_dereference(tn->child[i]);
 	int isfull;
 
 	BUG_ON(i >= 1<<tn->bits);
@@ -660,7 +679,7 @@ one_child:
 		for (i = 0; i < tnode_child_length(tn); i++) {
 			struct rt_trie_node *n;
 
-			n = tn->child[i];
+			n = rtnl_dereference(tn->child[i]);
 			if (!n)
 				continue;
 
@@ -674,6 +693,20 @@ one_child:
 	return (struct rt_trie_node *) tn;
 }
 
+
+static void tnode_clean_free(struct tnode *tn)
+{
+	int i;
+	struct tnode *tofree;
+
+	for (i = 0; i < tnode_child_length(tn); i++) {
+		tofree = (struct tnode *)rtnl_dereference(tn->child[i]);
+		if (tofree)
+			tnode_free(tofree);
+	}
+	tnode_free(tn);
+}
+
 static struct tnode *inflate(struct trie *t, struct tnode *tn)
 {
 	struct tnode *oldtnode = tn;
@@ -750,8 +783,8 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn)
 		inode = (struct tnode *) node;
 
 		if (inode->bits == 1) {
-			put_child(t, tn, 2*i, inode->child[0]);
-			put_child(t, tn, 2*i+1, inode->child[1]);
+			put_child(t, tn, 2*i, rtnl_dereference(inode->child[0]));
+			put_child(t, tn, 2*i+1, rtnl_dereference(inode->child[1]));
 
 			tnode_free_safe(inode);
 			continue;
@@ -792,8 +825,8 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn)
 
 		size = tnode_child_length(left);
 		for (j = 0; j < size; j++) {
-			put_child(t, left, j, inode->child[j]);
-			put_child(t, right, j, inode->child[j + size]);
+			put_child(t, left, j, rtnl_dereference(inode->child[j]));
+			put_child(t, right, j, rtnl_dereference(inode->child[j + size]));
 		}
 		put_child(t, tn, 2*i, resize(t, left));
 		put_child(t, tn, 2*i+1, resize(t, right));
@@ -803,18 +836,8 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn)
 	tnode_free_safe(oldtnode);
 	return tn;
 nomem:
-	{
-		int size = tnode_child_length(tn);
-		int j;
-
-		for (j = 0; j < size; j++)
-			if (tn->child[j])
-				tnode_free((struct tnode *)tn->child[j]);
-
-		tnode_free(tn);
-
-		return ERR_PTR(-ENOMEM);
-	}
+	tnode_clean_free(tn);
+	return ERR_PTR(-ENOMEM);
 }
 
 static struct tnode *halve(struct trie *t, struct tnode *tn)
@@ -885,18 +908,8 @@ static struct tnode *halve(struct trie *t, struct tnode *tn)
 	tnode_free_safe(oldtnode);
 	return tn;
 nomem:
-	{
-		int size = tnode_child_length(tn);
-		int j;
-
-		for (j = 0; j < size; j++)
-			if (tn->child[j])
-				tnode_free((struct tnode *)tn->child[j]);
-
-		tnode_free(tn);
-
-		return ERR_PTR(-ENOMEM);
-	}
+	tnode_clean_free(tn);
+	return ERR_PTR(-ENOMEM);
 }
 
 /* readside must use rcu_read_lock currently dump routines
@@ -1028,7 +1041,7 @@ static struct list_head *fib_insert_node(struct trie *t, u32 key, int plen)
 	t_key cindex;
 
 	pos = 0;
-	n = t->trie;
+	n = rtnl_dereference(t->trie);
 
 	/* If we point to NULL, stop. Either the tree is empty and we should
 	 * just put a new leaf in if, or we have reached an empty child slot,
@@ -1314,6 +1327,9 @@ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
 		}
 	}
 
+	if (!plen)
+		tb->tb_num_default++;
+
 	list_add_tail_rcu(&new_fa->fa_list,
 			  (fa ? &fa->fa_list : fa_head));
 
@@ -1679,6 +1695,9 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
 
 	list_del_rcu(&fa->fa_list);
 
+	if (!plen)
+		tb->tb_num_default--;
+
 	if (list_empty(fa_head)) {
 		hlist_del_rcu(&li->hlist);
 		free_leaf_info(li);
@@ -1751,7 +1770,7 @@ static struct leaf *leaf_walk_rcu(struct tnode *p, struct rt_trie_node *c)
 				continue;
 
 			if (IS_LEAF(c)) {
-				prefetch(p->child[idx]);
+				prefetch(rcu_dereference_rtnl(p->child[idx]));
 				return (struct leaf *) c;
 			}
 
@@ -1969,6 +1988,7 @@ struct fib_table *fib_trie_table(u32 id)
 
 	tb->tb_id = id;
 	tb->tb_default = -1;
+	tb->tb_num_default = 0;
 
 	t = (struct trie *) tb->tb_data;
 	memset(t, 0, sizeof(*t));
@@ -2264,7 +2284,7 @@ static void *fib_trie_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 
 	/* walk rest of this hash chain */
 	h = tb->tb_id & (FIB_TABLE_HASHSZ - 1);
-	while ( (tb_node = rcu_dereference(tb->tb_hlist.next)) ) {
+	while ((tb_node = rcu_dereference(hlist_next_rcu(&tb->tb_hlist)))) {
 		tb = hlist_entry(tb_node, struct fib_table, tb_hlist);
 		n = fib_trie_get_first(iter, (struct trie *) tb->tb_data);
 		if (n)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index e5f8a71..5395e45 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -83,6 +83,7 @@
 #include <net/tcp.h>
 #include <net/udp.h>
 #include <net/raw.h>
+#include <net/ping.h>
 #include <linux/skbuff.h>
 #include <net/sock.h>
 #include <linux/errno.h>
@@ -108,8 +109,7 @@ struct icmp_bxm {
 		__be32	       times[3];
 	} data;
 	int head_len;
-	struct ip_options replyopts;
-	unsigned char  optbuf[40];
+	struct ip_options_data replyopts;
 };
 
 /* An array of errno for error messages from dest unreach. */
@@ -234,7 +234,7 @@ static inline void icmp_xmit_unlock(struct sock *sk)
  */
 
 static inline bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
-		int type, int code)
+				      struct flowi4 *fl4, int type, int code)
 {
 	struct dst_entry *dst = &rt->dst;
 	bool rc = true;
@@ -253,7 +253,7 @@ static inline bool icmpv4_xrlim_allow(struct net *net, struct rtable *rt,
 	/* Limit if icmp type is enabled in ratemask. */
 	if ((1 << type) & net->ipv4.sysctl_icmp_ratemask) {
 		if (!rt->peer)
-			rt_bind_peer(rt, 1);
+			rt_bind_peer(rt, fl4->daddr, 1);
 		rc = inet_peer_xrlim_allow(rt->peer,
 					   net->ipv4.sysctl_icmp_ratelimit);
 	}
@@ -291,13 +291,14 @@ static int icmp_glue_bits(void *from, char *to, int offset, int len, int odd,
 }
 
 static void icmp_push_reply(struct icmp_bxm *icmp_param,
+			    struct flowi4 *fl4,
 			    struct ipcm_cookie *ipc, struct rtable **rt)
 {
 	struct sock *sk;
 	struct sk_buff *skb;
 
 	sk = icmp_sk(dev_net((*rt)->dst.dev));
-	if (ip_append_data(sk, icmp_glue_bits, icmp_param,
+	if (ip_append_data(sk, fl4, icmp_glue_bits, icmp_param,
 			   icmp_param->data_len+icmp_param->head_len,
 			   icmp_param->head_len,
 			   ipc, rt, MSG_DONTWAIT) < 0) {
@@ -316,7 +317,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param,
 						 icmp_param->head_len, csum);
 		icmph->checksum = csum_fold(csum);
 		skb->ip_summed = CHECKSUM_NONE;
-		ip_push_pending_frames(sk);
+		ip_push_pending_frames(sk, fl4);
 	}
 }
 
@@ -329,11 +330,12 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
 	struct ipcm_cookie ipc;
 	struct rtable *rt = skb_rtable(skb);
 	struct net *net = dev_net(rt->dst.dev);
+	struct flowi4 fl4;
 	struct sock *sk;
 	struct inet_sock *inet;
 	__be32 daddr;
 
-	if (ip_options_echo(&icmp_param->replyopts, skb))
+	if (ip_options_echo(&icmp_param->replyopts.opt.opt, skb))
 		return;
 
 	sk = icmp_xmit_lock(net);
@@ -344,65 +346,60 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
 	icmp_param->data.icmph.checksum = 0;
 
 	inet->tos = ip_hdr(skb)->tos;
-	daddr = ipc.addr = rt->rt_src;
+	daddr = ipc.addr = ip_hdr(skb)->saddr;
 	ipc.opt = NULL;
 	ipc.tx_flags = 0;
-	if (icmp_param->replyopts.optlen) {
-		ipc.opt = &icmp_param->replyopts;
-		if (ipc.opt->srr)
-			daddr = icmp_param->replyopts.faddr;
+	if (icmp_param->replyopts.opt.opt.optlen) {
+		ipc.opt = &icmp_param->replyopts.opt;
+		if (ipc.opt->opt.srr)
+			daddr = icmp_param->replyopts.opt.opt.faddr;
 	}
-	{
-		struct flowi4 fl4 = {
-			.daddr = daddr,
-			.saddr = rt->rt_spec_dst,
-			.flowi4_tos = RT_TOS(ip_hdr(skb)->tos),
-			.flowi4_proto = IPPROTO_ICMP,
-		};
-		security_skb_classify_flow(skb, flowi4_to_flowi(&fl4));
-		rt = ip_route_output_key(net, &fl4);
-		if (IS_ERR(rt))
-			goto out_unlock;
-	}
-	if (icmpv4_xrlim_allow(net, rt, icmp_param->data.icmph.type,
+	memset(&fl4, 0, sizeof(fl4));
+	fl4.daddr = daddr;
+	fl4.saddr = rt->rt_spec_dst;
+	fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos);
+	fl4.flowi4_proto = IPPROTO_ICMP;
+	security_skb_classify_flow(skb, flowi4_to_flowi(&fl4));
+	rt = ip_route_output_key(net, &fl4);
+	if (IS_ERR(rt))
+		goto out_unlock;
+	if (icmpv4_xrlim_allow(net, rt, &fl4, icmp_param->data.icmph.type,
 			       icmp_param->data.icmph.code))
-		icmp_push_reply(icmp_param, &ipc, &rt);
+		icmp_push_reply(icmp_param, &fl4, &ipc, &rt);
 	ip_rt_put(rt);
 out_unlock:
 	icmp_xmit_unlock(sk);
 }
 
-static struct rtable *icmp_route_lookup(struct net *net, struct sk_buff *skb_in,
-					struct iphdr *iph,
+static struct rtable *icmp_route_lookup(struct net *net,
+					struct flowi4 *fl4,
+					struct sk_buff *skb_in,
+					const struct iphdr *iph,
 					__be32 saddr, u8 tos,
 					int type, int code,
 					struct icmp_bxm *param)
 {
-	struct flowi4 fl4 = {
-		.daddr = (param->replyopts.srr ?
-			  param->replyopts.faddr : iph->saddr),
-		.saddr = saddr,
-		.flowi4_tos = RT_TOS(tos),
-		.flowi4_proto = IPPROTO_ICMP,
-		.fl4_icmp_type = type,
-		.fl4_icmp_code = code,
-	};
 	struct rtable *rt, *rt2;
 	int err;
 
-	security_skb_classify_flow(skb_in, flowi4_to_flowi(&fl4));
-	rt = __ip_route_output_key(net, &fl4);
+	memset(fl4, 0, sizeof(*fl4));
+	fl4->daddr = (param->replyopts.opt.opt.srr ?
+		      param->replyopts.opt.opt.faddr : iph->saddr);
+	fl4->saddr = saddr;
+	fl4->flowi4_tos = RT_TOS(tos);
+	fl4->flowi4_proto = IPPROTO_ICMP;
+	fl4->fl4_icmp_type = type;
+	fl4->fl4_icmp_code = code;
+	security_skb_classify_flow(skb_in, flowi4_to_flowi(fl4));
+	rt = __ip_route_output_key(net, fl4);
 	if (IS_ERR(rt))
 		return rt;
 
 	/* No need to clone since we're just using its address. */
 	rt2 = rt;
 
-	if (!fl4.saddr)
-		fl4.saddr = rt->rt_src;
-
 	rt = (struct rtable *) xfrm_lookup(net, &rt->dst,
-					   flowi4_to_flowi(&fl4), NULL, 0);
+					   flowi4_to_flowi(fl4), NULL, 0);
 	if (!IS_ERR(rt)) {
 		if (rt != rt2)
 			return rt;
@@ -411,19 +408,19 @@ static struct rtable *icmp_route_lookup(struct net *net, struct sk_buff *skb_in,
 	} else
 		return rt;
 
-	err = xfrm_decode_session_reverse(skb_in, flowi4_to_flowi(&fl4), AF_INET);
+	err = xfrm_decode_session_reverse(skb_in, flowi4_to_flowi(fl4), AF_INET);
 	if (err)
 		goto relookup_failed;
 
-	if (inet_addr_type(net, fl4.saddr) == RTN_LOCAL) {
-		rt2 = __ip_route_output_key(net, &fl4);
+	if (inet_addr_type(net, fl4->saddr) == RTN_LOCAL) {
+		rt2 = __ip_route_output_key(net, fl4);
 		if (IS_ERR(rt2))
 			err = PTR_ERR(rt2);
 	} else {
 		struct flowi4 fl4_2 = {};
 		unsigned long orefdst;
 
-		fl4_2.daddr = fl4.saddr;
+		fl4_2.daddr = fl4->saddr;
 		rt2 = ip_route_output_key(net, &fl4_2);
 		if (IS_ERR(rt2)) {
 			err = PTR_ERR(rt2);
@@ -431,7 +428,7 @@ static struct rtable *icmp_route_lookup(struct net *net, struct sk_buff *skb_in,
 		}
 		/* Ugh! */
 		orefdst = skb_in->_skb_refdst; /* save old refdst */
-		err = ip_route_input(skb_in, fl4.daddr, fl4.saddr,
+		err = ip_route_input(skb_in, fl4->daddr, fl4->saddr,
 				     RT_TOS(tos), rt2->dst.dev);
 
 		dst_release(&rt2->dst);
@@ -443,7 +440,7 @@ static struct rtable *icmp_route_lookup(struct net *net, struct sk_buff *skb_in,
 		goto relookup_failed;
 
 	rt2 = (struct rtable *) xfrm_lookup(net, &rt2->dst,
-					    flowi4_to_flowi(&fl4), NULL,
+					    flowi4_to_flowi(fl4), NULL,
 					    XFRM_LOOKUP_ICMP);
 	if (!IS_ERR(rt2)) {
 		dst_release(&rt->dst);
@@ -482,6 +479,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 	struct icmp_bxm icmp_param;
 	struct rtable *rt = skb_rtable(skb_in);
 	struct ipcm_cookie ipc;
+	struct flowi4 fl4;
 	__be32 saddr;
 	u8  tos;
 	struct net *net;
@@ -581,7 +579,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 					   IPTOS_PREC_INTERNETCONTROL) :
 					  iph->tos;
 
-	if (ip_options_echo(&icmp_param.replyopts, skb_in))
+	if (ip_options_echo(&icmp_param.replyopts.opt.opt, skb_in))
 		goto out_unlock;
 
 
@@ -597,15 +595,15 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 	icmp_param.offset = skb_network_offset(skb_in);
 	inet_sk(sk)->tos = tos;
 	ipc.addr = iph->saddr;
-	ipc.opt = &icmp_param.replyopts;
+	ipc.opt = &icmp_param.replyopts.opt;
 	ipc.tx_flags = 0;
 
-	rt = icmp_route_lookup(net, skb_in, iph, saddr, tos,
+	rt = icmp_route_lookup(net, &fl4, skb_in, iph, saddr, tos,
 			       type, code, &icmp_param);
 	if (IS_ERR(rt))
 		goto out_unlock;
 
-	if (!icmpv4_xrlim_allow(net, rt, type, code))
+	if (!icmpv4_xrlim_allow(net, rt, &fl4, type, code))
 		goto ende;
 
 	/* RFC says return as much as we can without exceeding 576 bytes. */
@@ -613,7 +611,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 	room = dst_mtu(&rt->dst);
 	if (room > 576)
 		room = 576;
-	room -= sizeof(struct iphdr) + icmp_param.replyopts.optlen;
+	room -= sizeof(struct iphdr) + icmp_param.replyopts.opt.opt.optlen;
 	room -= sizeof(struct icmphdr);
 
 	icmp_param.data_len = skb_in->len - icmp_param.offset;
@@ -621,7 +619,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 		icmp_param.data_len = room;
 	icmp_param.head_len = sizeof(struct icmphdr);
 
-	icmp_push_reply(&icmp_param, &ipc, &rt);
+	icmp_push_reply(&icmp_param, &fl4, &ipc, &rt);
 ende:
 	ip_rt_put(rt);
 out_unlock:
@@ -637,7 +635,7 @@ EXPORT_SYMBOL(icmp_send);
 
 static void icmp_unreach(struct sk_buff *skb)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	struct icmphdr *icmph;
 	int hash, protocol;
 	const struct net_protocol *ipprot;
@@ -656,7 +654,7 @@ static void icmp_unreach(struct sk_buff *skb)
 		goto out_err;
 
 	icmph = icmp_hdr(skb);
-	iph   = (struct iphdr *)skb->data;
+	iph   = (const struct iphdr *)skb->data;
 
 	if (iph->ihl < 5) /* Mangled header, drop. */
 		goto out_err;
@@ -729,7 +727,7 @@ static void icmp_unreach(struct sk_buff *skb)
 	if (!pskb_may_pull(skb, iph->ihl * 4 + 8))
 		goto out;
 
-	iph = (struct iphdr *)skb->data;
+	iph = (const struct iphdr *)skb->data;
 	protocol = iph->protocol;
 
 	/*
@@ -758,7 +756,7 @@ out_err:
 
 static void icmp_redirect(struct sk_buff *skb)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 
 	if (skb->len < sizeof(struct iphdr))
 		goto out_err;
@@ -769,7 +767,7 @@ static void icmp_redirect(struct sk_buff *skb)
 	if (!pskb_may_pull(skb, sizeof(struct iphdr)))
 		goto out;
 
-	iph = (struct iphdr *)skb->data;
+	iph = (const struct iphdr *)skb->data;
 
 	switch (icmp_hdr(skb)->code & 7) {
 	case ICMP_REDIR_NET:
@@ -784,6 +782,15 @@ static void icmp_redirect(struct sk_buff *skb)
 			       iph->saddr, skb->dev);
 		break;
 	}
+
+	/* Ping wants to see redirects.
+         * Let's pretend they are errors of sorts... */
+	if (iph->protocol == IPPROTO_ICMP &&
+	    iph->ihl >= 5 &&
+	    pskb_may_pull(skb, (iph->ihl<<2)+8)) {
+		ping_err(skb, icmp_hdr(skb)->un.gateway);
+	}
+
 out:
 	return;
 out_err:
@@ -933,12 +940,12 @@ static void icmp_address_reply(struct sk_buff *skb)
 		BUG_ON(mp == NULL);
 		for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
 			if (*mp == ifa->ifa_mask &&
-			    inet_ifa_match(rt->rt_src, ifa))
+			    inet_ifa_match(ip_hdr(skb)->saddr, ifa))
 				break;
 		}
 		if (!ifa && net_ratelimit()) {
 			printk(KERN_INFO "Wrong address mask %pI4 from %s/%pI4\n",
-			       mp, dev->name, &rt->rt_src);
+			       mp, dev->name, &ip_hdr(skb)->saddr);
 		}
 	}
 }
@@ -1044,7 +1051,7 @@ error:
  */
 static const struct icmp_control icmp_pointers[NR_ICMP_TYPES + 1] = {
 	[ICMP_ECHOREPLY] = {
-		.handler = icmp_discard,
+		.handler = ping_rcv,
 	},
 	[1] = {
 		.handler = icmp_discard,
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 8f62d66..672e476 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -303,6 +303,7 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
 	struct iphdr *pip;
 	struct igmpv3_report *pig;
 	struct net *net = dev_net(dev);
+	struct flowi4 fl4;
 
 	while (1) {
 		skb = alloc_skb(size + LL_ALLOCATED_SPACE(dev),
@@ -315,18 +316,13 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
 	}
 	igmp_skb_size(skb) = size;
 
-	rt = ip_route_output_ports(net, NULL, IGMPV3_ALL_MCR, 0,
+	rt = ip_route_output_ports(net, &fl4, NULL, IGMPV3_ALL_MCR, 0,
 				   0, 0,
 				   IPPROTO_IGMP, 0, dev->ifindex);
 	if (IS_ERR(rt)) {
 		kfree_skb(skb);
 		return NULL;
 	}
-	if (rt->rt_src == 0) {
-		kfree_skb(skb);
-		ip_rt_put(rt);
-		return NULL;
-	}
 
 	skb_dst_set(skb, &rt->dst);
 	skb->dev = dev;
@@ -342,8 +338,8 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
 	pip->tos      = 0xc0;
 	pip->frag_off = htons(IP_DF);
 	pip->ttl      = 1;
-	pip->daddr    = rt->rt_dst;
-	pip->saddr    = rt->rt_src;
+	pip->daddr    = fl4.daddr;
+	pip->saddr    = fl4.saddr;
 	pip->protocol = IPPROTO_IGMP;
 	pip->tot_len  = 0;	/* filled in later */
 	ip_select_ident(pip, &rt->dst, NULL);
@@ -649,6 +645,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 	struct net_device *dev = in_dev->dev;
 	struct net *net = dev_net(dev);
 	__be32	group = pmc ? pmc->multiaddr : 0;
+	struct flowi4 fl4;
 	__be32	dst;
 
 	if (type == IGMPV3_HOST_MEMBERSHIP_REPORT)
@@ -658,17 +655,12 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 	else
 		dst = group;
 
-	rt = ip_route_output_ports(net, NULL, dst, 0,
+	rt = ip_route_output_ports(net, &fl4, NULL, dst, 0,
 				   0, 0,
 				   IPPROTO_IGMP, 0, dev->ifindex);
 	if (IS_ERR(rt))
 		return -1;
 
-	if (rt->rt_src == 0) {
-		ip_rt_put(rt);
-		return -1;
-	}
-
 	skb = alloc_skb(IGMP_SIZE+LL_ALLOCATED_SPACE(dev), GFP_ATOMIC);
 	if (skb == NULL) {
 		ip_rt_put(rt);
@@ -689,7 +681,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 	iph->frag_off = htons(IP_DF);
 	iph->ttl      = 1;
 	iph->daddr    = dst;
-	iph->saddr    = rt->rt_src;
+	iph->saddr    = fl4.saddr;
 	iph->protocol = IPPROTO_IGMP;
 	ip_select_ident(iph, &rt->dst, NULL);
 	((u8*)&iph[1])[0] = IPOPT_RA;
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 38f23e7..61fac4c 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -350,30 +350,24 @@ void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long len)
 EXPORT_SYMBOL(inet_csk_reset_keepalive_timer);
 
 struct dst_entry *inet_csk_route_req(struct sock *sk,
+				     struct flowi4 *fl4,
 				     const struct request_sock *req)
 {
 	struct rtable *rt;
 	const struct inet_request_sock *ireq = inet_rsk(req);
-	struct ip_options *opt = inet_rsk(req)->opt;
-	struct flowi4 fl4 = {
-		.flowi4_oif = sk->sk_bound_dev_if,
-		.flowi4_mark = sk->sk_mark,
-		.daddr = ((opt && opt->srr) ?
-			  opt->faddr : ireq->rmt_addr),
-		.saddr = ireq->loc_addr,
-		.flowi4_tos = RT_CONN_FLAGS(sk),
-		.flowi4_proto = sk->sk_protocol,
-		.flowi4_flags = inet_sk_flowi_flags(sk),
-		.fl4_sport = inet_sk(sk)->inet_sport,
-		.fl4_dport = ireq->rmt_port,
-	};
+	struct ip_options_rcu *opt = inet_rsk(req)->opt;
 	struct net *net = sock_net(sk);
 
-	security_req_classify_flow(req, flowi4_to_flowi(&fl4));
-	rt = ip_route_output_flow(net, &fl4, sk);
+	flowi4_init_output(fl4, sk->sk_bound_dev_if, sk->sk_mark,
+			   RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE,
+			   sk->sk_protocol, inet_sk_flowi_flags(sk),
+			   (opt && opt->opt.srr) ? opt->opt.faddr : ireq->rmt_addr,
+			   ireq->loc_addr, ireq->rmt_port, inet_sk(sk)->inet_sport);
+	security_req_classify_flow(req, flowi4_to_flowi(fl4));
+	rt = ip_route_output_flow(net, fl4, sk);
 	if (IS_ERR(rt))
 		goto no_route;
-	if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+	if (opt && opt->opt.is_strictroute && fl4->daddr != rt->rt_gateway)
 		goto route_err;
 	return &rt->dst;
 
@@ -385,6 +379,39 @@ no_route:
 }
 EXPORT_SYMBOL_GPL(inet_csk_route_req);
 
+struct dst_entry *inet_csk_route_child_sock(struct sock *sk,
+					    struct sock *newsk,
+					    const struct request_sock *req)
+{
+	const struct inet_request_sock *ireq = inet_rsk(req);
+	struct inet_sock *newinet = inet_sk(newsk);
+	struct ip_options_rcu *opt = ireq->opt;
+	struct net *net = sock_net(sk);
+	struct flowi4 *fl4;
+	struct rtable *rt;
+
+	fl4 = &newinet->cork.fl.u.ip4;
+	flowi4_init_output(fl4, sk->sk_bound_dev_if, sk->sk_mark,
+			   RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE,
+			   sk->sk_protocol, inet_sk_flowi_flags(sk),
+			   (opt && opt->opt.srr) ? opt->opt.faddr : ireq->rmt_addr,
+			   ireq->loc_addr, ireq->rmt_port, inet_sk(sk)->inet_sport);
+	security_req_classify_flow(req, flowi4_to_flowi(fl4));
+	rt = ip_route_output_flow(net, fl4, sk);
+	if (IS_ERR(rt))
+		goto no_route;
+	if (opt && opt->opt.is_strictroute && fl4->daddr != rt->rt_gateway)
+		goto route_err;
+	return &rt->dst;
+
+route_err:
+	ip_rt_put(rt);
+no_route:
+	IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(inet_csk_route_child_sock);
+
 static inline u32 inet_synq_hash(const __be32 raddr, const __be16 rport,
 				 const u32 rnd, const u32 synq_hsize)
 {
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 2ada171..6ffe94c 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -124,7 +124,7 @@ static int inet_csk_diag_fill(struct sock *sk,
 
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 	if (r->idiag_family == AF_INET6) {
-		struct ipv6_pinfo *np = inet6_sk(sk);
+		const struct ipv6_pinfo *np = inet6_sk(sk);
 
 		ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
 			       &np->rcv_saddr);
diff --git a/net/ipv4/inet_lro.c b/net/ipv4/inet_lro.c
index 47038cb..85a0f75 100644
--- a/net/ipv4/inet_lro.c
+++ b/net/ipv4/inet_lro.c
@@ -51,8 +51,8 @@ MODULE_DESCRIPTION("Large Receive Offload (ipv4 / tcp)");
  * Basic tcp checks whether packet is suitable for LRO
  */
 
-static int lro_tcp_ip_check(struct iphdr *iph, struct tcphdr *tcph,
-			    int len, struct net_lro_desc *lro_desc)
+static int lro_tcp_ip_check(const struct iphdr *iph, const struct tcphdr *tcph,
+			    int len, const struct net_lro_desc *lro_desc)
 {
         /* check ip header: don't aggregate padded frames */
 	if (ntohs(iph->tot_len) != len)
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 99461f0..3b34d1c 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -84,7 +84,7 @@ int ip_forward(struct sk_buff *skb)
 
 	rt = skb_rtable(skb);
 
-	if (opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+	if (opt->is_strictroute && ip_hdr(skb)->daddr != rt->rt_gateway)
 		goto sr_failed;
 
 	if (unlikely(skb->len > dst_mtu(&rt->dst) && !skb_is_gso(skb) &&
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index b1d282f..0ad6035 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -77,22 +77,40 @@ struct ipq {
 	struct inet_peer *peer;
 };
 
-#define IPFRAG_ECN_CLEAR  0x01 /* one frag had INET_ECN_NOT_ECT */
-#define IPFRAG_ECN_SET_CE 0x04 /* one frag had INET_ECN_CE */
+/* RFC 3168 support :
+ * We want to check ECN values of all fragments, do detect invalid combinations.
+ * In ipq->ecn, we store the OR value of each ip4_frag_ecn() fragment value.
+ */
+#define	IPFRAG_ECN_NOT_ECT	0x01 /* one frag had ECN_NOT_ECT */
+#define	IPFRAG_ECN_ECT_1	0x02 /* one frag had ECN_ECT_1 */
+#define	IPFRAG_ECN_ECT_0	0x04 /* one frag had ECN_ECT_0 */
+#define	IPFRAG_ECN_CE		0x08 /* one frag had ECN_CE */
 
 static inline u8 ip4_frag_ecn(u8 tos)
 {
-	tos = (tos & INET_ECN_MASK) + 1;
-	/*
-	 * After the last operation we have (in binary):
-	 * INET_ECN_NOT_ECT => 001
-	 * INET_ECN_ECT_1   => 010
-	 * INET_ECN_ECT_0   => 011
-	 * INET_ECN_CE      => 100
-	 */
-	return (tos & 2) ? 0 : tos;
+	return 1 << (tos & INET_ECN_MASK);
 }
 
+/* Given the OR values of all fragments, apply RFC 3168 5.3 requirements
+ * Value : 0xff if frame should be dropped.
+ *         0 or INET_ECN_CE value, to be ORed in to final iph->tos field
+ */
+static const u8 ip4_frag_ecn_table[16] = {
+	/* at least one fragment had CE, and others ECT_0 or ECT_1 */
+	[IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0]			= INET_ECN_CE,
+	[IPFRAG_ECN_CE | IPFRAG_ECN_ECT_1]			= INET_ECN_CE,
+	[IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0 | IPFRAG_ECN_ECT_1]	= INET_ECN_CE,
+
+	/* invalid combinations : drop frame */
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE] = 0xff,
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_ECT_0] = 0xff,
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_ECT_1] = 0xff,
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_ECT_0 | IPFRAG_ECN_ECT_1] = 0xff,
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0] = 0xff,
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE | IPFRAG_ECN_ECT_1] = 0xff,
+	[IPFRAG_ECN_NOT_ECT | IPFRAG_ECN_CE | IPFRAG_ECN_ECT_0 | IPFRAG_ECN_ECT_1] = 0xff,
+};
+
 static struct inet_frags ip4_frags;
 
 int ip_frag_nqueues(struct net *net)
@@ -524,9 +542,15 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
 	int len;
 	int ihlen;
 	int err;
+	u8 ecn;
 
 	ipq_kill(qp);
 
+	ecn = ip4_frag_ecn_table[qp->ecn];
+	if (unlikely(ecn == 0xff)) {
+		err = -EINVAL;
+		goto out_fail;
+	}
 	/* Make the one we just received the head. */
 	if (prev) {
 		head = prev->next;
@@ -605,17 +629,7 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
 	iph = ip_hdr(head);
 	iph->frag_off = 0;
 	iph->tot_len = htons(len);
-	/* RFC3168 5.3 Fragmentation support
-	 * If one fragment had INET_ECN_NOT_ECT,
-	 *	reassembled frame also has INET_ECN_NOT_ECT
-	 * Elif one fragment had INET_ECN_CE
-	 *	reassembled frame also has INET_ECN_CE
-	 */
-	if (qp->ecn & IPFRAG_ECN_CLEAR)
-		iph->tos &= ~INET_ECN_MASK;
-	else if (qp->ecn & IPFRAG_ECN_SET_CE)
-		iph->tos |= INET_ECN_CE;
-
+	iph->tos |= ecn;
 	IP_INC_STATS_BH(net, IPSTATS_MIB_REASMOKS);
 	qp->q.fragments = NULL;
 	qp->q.fragments_tail = NULL;
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index da5941f..8871067 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -413,11 +413,6 @@ static struct ip_tunnel *ipgre_tunnel_locate(struct net *net,
 
 	dev_net_set(dev, net);
 
-	if (strchr(name, '%')) {
-		if (dev_alloc_name(dev, name) < 0)
-			goto failed_free;
-	}
-
 	nt = netdev_priv(dev);
 	nt->parms = *parms;
 	dev->rtnl_link_ops = &ipgre_link_ops;
@@ -462,7 +457,7 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
    by themself???
  */
 
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	__be16	     *p = (__be16*)(skb->data+(iph->ihl<<2));
 	int grehlen = (iph->ihl<<2) + 4;
 	const int type = icmp_hdr(skb)->type;
@@ -534,7 +529,7 @@ out:
 	rcu_read_unlock();
 }
 
-static inline void ipgre_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
+static inline void ipgre_ecn_decapsulate(const struct iphdr *iph, struct sk_buff *skb)
 {
 	if (INET_ECN_is_ce(iph->tos)) {
 		if (skb->protocol == htons(ETH_P_IP)) {
@@ -546,19 +541,19 @@ static inline void ipgre_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
 }
 
 static inline u8
-ipgre_ecn_encapsulate(u8 tos, struct iphdr *old_iph, struct sk_buff *skb)
+ipgre_ecn_encapsulate(u8 tos, const struct iphdr *old_iph, struct sk_buff *skb)
 {
 	u8 inner = 0;
 	if (skb->protocol == htons(ETH_P_IP))
 		inner = old_iph->tos;
 	else if (skb->protocol == htons(ETH_P_IPV6))
-		inner = ipv6_get_dsfield((struct ipv6hdr *)old_iph);
+		inner = ipv6_get_dsfield((const struct ipv6hdr *)old_iph);
 	return INET_ECN_encapsulate(tos, inner);
 }
 
 static int ipgre_rcv(struct sk_buff *skb)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	u8     *h;
 	__be16    flags;
 	__sum16   csum = 0;
@@ -697,8 +692,9 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct pcpu_tstats *tstats;
-	struct iphdr  *old_iph = ip_hdr(skb);
-	struct iphdr  *tiph;
+	const struct iphdr  *old_iph = ip_hdr(skb);
+	const struct iphdr  *tiph;
+	struct flowi4 fl4;
 	u8     tos;
 	__be16 df;
 	struct rtable *rt;     			/* Route to the other host */
@@ -714,7 +710,7 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 
 	if (dev->header_ops && dev->type == ARPHRD_IPGRE) {
 		gre_hlen = 0;
-		tiph = (struct iphdr *)skb->data;
+		tiph = (const struct iphdr *)skb->data;
 	} else {
 		gre_hlen = tunnel->hlen;
 		tiph = &tunnel->parms.iph;
@@ -735,14 +731,14 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 		}
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 		else if (skb->protocol == htons(ETH_P_IPV6)) {
-			struct in6_addr *addr6;
+			const struct in6_addr *addr6;
 			int addr_type;
 			struct neighbour *neigh = skb_dst(skb)->neighbour;
 
 			if (neigh == NULL)
 				goto tx_error;
 
-			addr6 = (struct in6_addr *)&neigh->primary_key;
+			addr6 = (const struct in6_addr *)&neigh->primary_key;
 			addr_type = ipv6_addr_type(addr6);
 
 			if (addr_type == IPV6_ADDR_ANY) {
@@ -766,10 +762,10 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 		if (skb->protocol == htons(ETH_P_IP))
 			tos = old_iph->tos;
 		else if (skb->protocol == htons(ETH_P_IPV6))
-			tos = ipv6_get_dsfield((struct ipv6hdr *)old_iph);
+			tos = ipv6_get_dsfield((const struct ipv6hdr *)old_iph);
 	}
 
-	rt = ip_route_output_gre(dev_net(dev), dst, tiph->saddr,
+	rt = ip_route_output_gre(dev_net(dev), &fl4, dst, tiph->saddr,
 				 tunnel->parms.o_key, RT_TOS(tos),
 				 tunnel->parms.link);
 	if (IS_ERR(rt)) {
@@ -873,15 +869,15 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev
 	iph->frag_off		=	df;
 	iph->protocol		=	IPPROTO_GRE;
 	iph->tos		=	ipgre_ecn_encapsulate(tos, old_iph, skb);
-	iph->daddr		=	rt->rt_dst;
-	iph->saddr		=	rt->rt_src;
+	iph->daddr		=	fl4.daddr;
+	iph->saddr		=	fl4.saddr;
 
 	if ((iph->ttl = tiph->ttl) == 0) {
 		if (skb->protocol == htons(ETH_P_IP))
 			iph->ttl = old_iph->ttl;
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 		else if (skb->protocol == htons(ETH_P_IPV6))
-			iph->ttl = ((struct ipv6hdr *)old_iph)->hop_limit;
+			iph->ttl = ((const struct ipv6hdr *)old_iph)->hop_limit;
 #endif
 		else
 			iph->ttl = ip4_dst_hoplimit(&rt->dst);
@@ -927,7 +923,7 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
 {
 	struct net_device *tdev = NULL;
 	struct ip_tunnel *tunnel;
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	int hlen = LL_MAX_HEADER;
 	int mtu = ETH_DATA_LEN;
 	int addend = sizeof(struct iphdr) + 4;
@@ -938,12 +934,14 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
 	/* Guess output device to choose reasonable mtu and needed_headroom */
 
 	if (iph->daddr) {
-		struct rtable *rt = ip_route_output_gre(dev_net(dev),
-							iph->daddr, iph->saddr,
-							tunnel->parms.o_key,
-							RT_TOS(iph->tos),
-							tunnel->parms.link);
-
+		struct flowi4 fl4;
+		struct rtable *rt;
+
+		rt = ip_route_output_gre(dev_net(dev), &fl4,
+					 iph->daddr, iph->saddr,
+					 tunnel->parms.o_key,
+					 RT_TOS(iph->tos),
+					 tunnel->parms.link);
 		if (!IS_ERR(rt)) {
 			tdev = rt->dst.dev;
 			ip_rt_put(rt);
@@ -1180,7 +1178,7 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev,
 
 static int ipgre_header_parse(const struct sk_buff *skb, unsigned char *haddr)
 {
-	struct iphdr *iph = (struct iphdr *) skb_mac_header(skb);
+	const struct iphdr *iph = (const struct iphdr *) skb_mac_header(skb);
 	memcpy(haddr, &iph->saddr, 4);
 	return 4;
 }
@@ -1196,13 +1194,15 @@ static int ipgre_open(struct net_device *dev)
 	struct ip_tunnel *t = netdev_priv(dev);
 
 	if (ipv4_is_multicast(t->parms.iph.daddr)) {
-		struct rtable *rt = ip_route_output_gre(dev_net(dev),
-							t->parms.iph.daddr,
-							t->parms.iph.saddr,
-							t->parms.o_key,
-							RT_TOS(t->parms.iph.tos),
-							t->parms.link);
-
+		struct flowi4 fl4;
+		struct rtable *rt;
+
+		rt = ip_route_output_gre(dev_net(dev), &fl4,
+					 t->parms.iph.daddr,
+					 t->parms.iph.saddr,
+					 t->parms.o_key,
+					 RT_TOS(t->parms.iph.tos),
+					 t->parms.link);
 		if (IS_ERR(rt))
 			return -EADDRNOTAVAIL;
 		dev = rt->dst.dev;
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index d7b2b09..c8f48ef 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -268,7 +268,7 @@ int ip_local_deliver(struct sk_buff *skb)
 static inline int ip_rcv_options(struct sk_buff *skb)
 {
 	struct ip_options *opt;
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	struct net_device *dev = skb->dev;
 
 	/* It looks as overkill, because not all
@@ -374,7 +374,7 @@ drop:
  */
 int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
 {
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	u32 len;
 
 	/* When the interface is in promisc. mode, drop all the crap
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index 2391b24..c3118e1 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -36,8 +36,8 @@
  * saddr is address of outgoing interface.
  */
 
-void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
-			    __be32 daddr, struct rtable *rt, int is_frag)
+void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
+		      __be32 daddr, struct rtable *rt, int is_frag)
 {
 	unsigned char *iph = skb_network_header(skb);
 
@@ -50,9 +50,9 @@ void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
 
 	if (!is_frag) {
 		if (opt->rr_needaddr)
-			ip_rt_get_source(iph+opt->rr+iph[opt->rr+2]-5, rt);
+			ip_rt_get_source(iph+opt->rr+iph[opt->rr+2]-5, skb, rt);
 		if (opt->ts_needaddr)
-			ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, rt);
+			ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, skb, rt);
 		if (opt->ts_needtime) {
 			struct timespec tv;
 			__be32 midtime;
@@ -83,9 +83,9 @@ void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
  * NOTE: dopt cannot point to skb.
  */
 
-int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
+int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb)
 {
-	struct ip_options *sopt;
+	const struct ip_options *sopt;
 	unsigned char *sptr, *dptr;
 	int soffset, doffset;
 	int	optlen;
@@ -95,10 +95,8 @@ int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
 
 	sopt = &(IPCB(skb)->opt);
 
-	if (sopt->optlen == 0) {
-		dopt->optlen = 0;
+	if (sopt->optlen == 0)
 		return 0;
-	}
 
 	sptr = skb_network_header(skb);
 	dptr = dopt->__data;
@@ -157,7 +155,7 @@ int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
 		dopt->optlen += optlen;
 	}
 	if (sopt->srr) {
-		unsigned char * start = sptr+sopt->srr;
+		unsigned char *start = sptr+sopt->srr;
 		__be32 faddr;
 
 		optlen  = start[1];
@@ -499,19 +497,19 @@ void ip_options_undo(struct ip_options * opt)
 	}
 }
 
-static struct ip_options *ip_options_get_alloc(const int optlen)
+static struct ip_options_rcu *ip_options_get_alloc(const int optlen)
 {
-	return kzalloc(sizeof(struct ip_options) + ((optlen + 3) & ~3),
+	return kzalloc(sizeof(struct ip_options_rcu) + ((optlen + 3) & ~3),
 		       GFP_KERNEL);
 }
 
-static int ip_options_get_finish(struct net *net, struct ip_options **optp,
-				 struct ip_options *opt, int optlen)
+static int ip_options_get_finish(struct net *net, struct ip_options_rcu **optp,
+				 struct ip_options_rcu *opt, int optlen)
 {
 	while (optlen & 3)
-		opt->__data[optlen++] = IPOPT_END;
-	opt->optlen = optlen;
-	if (optlen && ip_options_compile(net, opt, NULL)) {
+		opt->opt.__data[optlen++] = IPOPT_END;
+	opt->opt.optlen = optlen;
+	if (optlen && ip_options_compile(net, &opt->opt, NULL)) {
 		kfree(opt);
 		return -EINVAL;
 	}
@@ -520,29 +518,29 @@ static int ip_options_get_finish(struct net *net, struct ip_options **optp,
 	return 0;
 }
 
-int ip_options_get_from_user(struct net *net, struct ip_options **optp,
+int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
 			     unsigned char __user *data, int optlen)
 {
-	struct ip_options *opt = ip_options_get_alloc(optlen);
+	struct ip_options_rcu *opt = ip_options_get_alloc(optlen);
 
 	if (!opt)
 		return -ENOMEM;
-	if (optlen && copy_from_user(opt->__data, data, optlen)) {
+	if (optlen && copy_from_user(opt->opt.__data, data, optlen)) {
 		kfree(opt);
 		return -EFAULT;
 	}
 	return ip_options_get_finish(net, optp, opt, optlen);
 }
 
-int ip_options_get(struct net *net, struct ip_options **optp,
+int ip_options_get(struct net *net, struct ip_options_rcu **optp,
 		   unsigned char *data, int optlen)
 {
-	struct ip_options *opt = ip_options_get_alloc(optlen);
+	struct ip_options_rcu *opt = ip_options_get_alloc(optlen);
 
 	if (!opt)
 		return -ENOMEM;
 	if (optlen)
-		memcpy(opt->__data, data, optlen);
+		memcpy(opt->opt.__data, data, optlen);
 	return ip_options_get_finish(net, optp, opt, optlen);
 }
 
@@ -555,7 +553,7 @@ void ip_forward_options(struct sk_buff *skb)
 
 	if (opt->rr_needaddr) {
 		optptr = (unsigned char *)raw + opt->rr;
-		ip_rt_get_source(&optptr[optptr[2]-5], rt);
+		ip_rt_get_source(&optptr[optptr[2]-5], skb, rt);
 		opt->is_changed = 1;
 	}
 	if (opt->srr_is_hit) {
@@ -569,19 +567,18 @@ void ip_forward_options(struct sk_buff *skb)
 		     ) {
 			if (srrptr + 3 > srrspace)
 				break;
-			if (memcmp(&rt->rt_dst, &optptr[srrptr-1], 4) == 0)
+			if (memcmp(&ip_hdr(skb)->daddr, &optptr[srrptr-1], 4) == 0)
 				break;
 		}
 		if (srrptr + 3 <= srrspace) {
 			opt->is_changed = 1;
-			ip_rt_get_source(&optptr[srrptr-1], rt);
-			ip_hdr(skb)->daddr = rt->rt_dst;
+			ip_rt_get_source(&optptr[srrptr-1], skb, rt);
 			optptr[2] = srrptr+4;
 		} else if (net_ratelimit())
 			printk(KERN_CRIT "ip_forward(): Argh! Destination lost!\n");
 		if (opt->ts_needaddr) {
 			optptr = raw + opt->ts;
-			ip_rt_get_source(&optptr[optptr[2]-9], rt);
+			ip_rt_get_source(&optptr[optptr[2]-9], skb, rt);
 			opt->is_changed = 1;
 		}
 	}
@@ -603,7 +600,7 @@ int ip_options_rcv_srr(struct sk_buff *skb)
 	unsigned long orefdst;
 	int err;
 
-	if (!opt->srr || !rt)
+	if (!rt)
 		return 0;
 
 	if (skb->pkt_type != PACKET_HOST)
@@ -637,7 +634,7 @@ int ip_options_rcv_srr(struct sk_buff *skb)
 		if (rt2->rt_type != RTN_LOCAL)
 			break;
 		/* Superfast 8) loopback forward */
-		memcpy(&iph->daddr, &optptr[srrptr-1], 4);
+		iph->daddr = nexthop;
 		opt->is_changed = 1;
 	}
 	if (srrptr <= srrspace) {
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 459c011..98af369 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -140,14 +140,14 @@ static inline int ip_select_ttl(struct inet_sock *inet, struct dst_entry *dst)
  *
  */
 int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
-			  __be32 saddr, __be32 daddr, struct ip_options *opt)
+			  __be32 saddr, __be32 daddr, struct ip_options_rcu *opt)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct rtable *rt = skb_rtable(skb);
 	struct iphdr *iph;
 
 	/* Build the IP header. */
-	skb_push(skb, sizeof(struct iphdr) + (opt ? opt->optlen : 0));
+	skb_push(skb, sizeof(struct iphdr) + (opt ? opt->opt.optlen : 0));
 	skb_reset_network_header(skb);
 	iph = ip_hdr(skb);
 	iph->version  = 4;
@@ -158,14 +158,14 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
 	else
 		iph->frag_off = 0;
 	iph->ttl      = ip_select_ttl(inet, &rt->dst);
-	iph->daddr    = rt->rt_dst;
-	iph->saddr    = rt->rt_src;
+	iph->daddr    = (opt && opt->opt.srr ? opt->opt.faddr : daddr);
+	iph->saddr    = saddr;
 	iph->protocol = sk->sk_protocol;
 	ip_select_ident(iph, &rt->dst, sk);
 
-	if (opt && opt->optlen) {
-		iph->ihl += opt->optlen>>2;
-		ip_options_build(skb, opt, daddr, rt, 0);
+	if (opt && opt->opt.optlen) {
+		iph->ihl += opt->opt.optlen>>2;
+		ip_options_build(skb, &opt->opt, daddr, rt, 0);
 	}
 
 	skb->priority = sk->sk_priority;
@@ -312,11 +312,12 @@ int ip_output(struct sk_buff *skb)
 			    !(IPCB(skb)->flags & IPSKB_REROUTED));
 }
 
-int ip_queue_xmit(struct sk_buff *skb)
+int ip_queue_xmit(struct sk_buff *skb, struct flowi *fl)
 {
 	struct sock *sk = skb->sk;
 	struct inet_sock *inet = inet_sk(sk);
-	struct ip_options *opt = inet->opt;
+	struct ip_options_rcu *inet_opt;
+	struct flowi4 *fl4;
 	struct rtable *rt;
 	struct iphdr *iph;
 	int res;
@@ -325,6 +326,8 @@ int ip_queue_xmit(struct sk_buff *skb)
 	 * f.e. by something like SCTP.
 	 */
 	rcu_read_lock();
+	inet_opt = rcu_dereference(inet->inet_opt);
+	fl4 = &fl->u.ip4;
 	rt = skb_rtable(skb);
 	if (rt != NULL)
 		goto packet_routed;
@@ -336,14 +339,14 @@ int ip_queue_xmit(struct sk_buff *skb)
 
 		/* Use correct destination address if we have options. */
 		daddr = inet->inet_daddr;
-		if(opt && opt->srr)
-			daddr = opt->faddr;
+		if (inet_opt && inet_opt->opt.srr)
+			daddr = inet_opt->opt.faddr;
 
 		/* If this fails, retransmit mechanism of transport layer will
 		 * keep trying until route appears or the connection times
 		 * itself out.
 		 */
-		rt = ip_route_output_ports(sock_net(sk), sk,
+		rt = ip_route_output_ports(sock_net(sk), fl4, sk,
 					   daddr, inet->inet_saddr,
 					   inet->inet_dport,
 					   inet->inet_sport,
@@ -357,11 +360,11 @@ int ip_queue_xmit(struct sk_buff *skb)
 	skb_dst_set_noref(skb, &rt->dst);
 
 packet_routed:
-	if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+	if (inet_opt && inet_opt->opt.is_strictroute && fl4->daddr != rt->rt_gateway)
 		goto no_route;
 
 	/* OK, we know where to send it, allocate and build IP header. */
-	skb_push(skb, sizeof(struct iphdr) + (opt ? opt->optlen : 0));
+	skb_push(skb, sizeof(struct iphdr) + (inet_opt ? inet_opt->opt.optlen : 0));
 	skb_reset_network_header(skb);
 	iph = ip_hdr(skb);
 	*((__be16 *)iph) = htons((4 << 12) | (5 << 8) | (inet->tos & 0xff));
@@ -371,13 +374,13 @@ packet_routed:
 		iph->frag_off = 0;
 	iph->ttl      = ip_select_ttl(inet, &rt->dst);
 	iph->protocol = sk->sk_protocol;
-	iph->saddr    = rt->rt_src;
-	iph->daddr    = rt->rt_dst;
+	iph->saddr    = fl4->saddr;
+	iph->daddr    = fl4->daddr;
 	/* Transport layer set skb->h.foo itself. */
 
-	if (opt && opt->optlen) {
-		iph->ihl += opt->optlen >> 2;
-		ip_options_build(skb, opt, inet->inet_daddr, rt, 0);
+	if (inet_opt && inet_opt->opt.optlen) {
+		iph->ihl += inet_opt->opt.optlen >> 2;
+		ip_options_build(skb, &inet_opt->opt, inet->inet_daddr, rt, 0);
 	}
 
 	ip_select_ident_more(iph, &rt->dst, sk,
@@ -773,7 +776,9 @@ static inline int ip_ufo_append_data(struct sock *sk,
 				       (length - transhdrlen));
 }
 
-static int __ip_append_data(struct sock *sk, struct sk_buff_head *queue,
+static int __ip_append_data(struct sock *sk,
+			    struct flowi4 *fl4,
+			    struct sk_buff_head *queue,
 			    struct inet_cork *cork,
 			    int getfrag(void *from, char *to, int offset,
 					int len, int odd, struct sk_buff *skb),
@@ -805,7 +810,7 @@ static int __ip_append_data(struct sock *sk, struct sk_buff_head *queue,
 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
 
 	if (cork->length + length > 0xFFFF - fragheaderlen) {
-		ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
+		ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
 			       mtu-exthdrlen);
 		return -EMSGSIZE;
 	}
@@ -1033,7 +1038,7 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork,
 			 struct ipcm_cookie *ipc, struct rtable **rtp)
 {
 	struct inet_sock *inet = inet_sk(sk);
-	struct ip_options *opt;
+	struct ip_options_rcu *opt;
 	struct rtable *rt;
 
 	/*
@@ -1047,7 +1052,7 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork,
 			if (unlikely(cork->opt == NULL))
 				return -ENOBUFS;
 		}
-		memcpy(cork->opt, opt, sizeof(struct ip_options) + opt->optlen);
+		memcpy(cork->opt, &opt->opt, sizeof(struct ip_options) + opt->opt.optlen);
 		cork->flags |= IPCORK_OPT;
 		cork->addr = ipc->addr;
 	}
@@ -1080,7 +1085,7 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork,
  *
  *	LATER: length must be adjusted by pad at tail, when it is required.
  */
-int ip_append_data(struct sock *sk,
+int ip_append_data(struct sock *sk, struct flowi4 *fl4,
 		   int getfrag(void *from, char *to, int offset, int len,
 			       int odd, struct sk_buff *skb),
 		   void *from, int length, int transhdrlen,
@@ -1094,24 +1099,25 @@ int ip_append_data(struct sock *sk,
 		return 0;
 
 	if (skb_queue_empty(&sk->sk_write_queue)) {
-		err = ip_setup_cork(sk, &inet->cork, ipc, rtp);
+		err = ip_setup_cork(sk, &inet->cork.base, ipc, rtp);
 		if (err)
 			return err;
 	} else {
 		transhdrlen = 0;
 	}
 
-	return __ip_append_data(sk, &sk->sk_write_queue, &inet->cork, getfrag,
+	return __ip_append_data(sk, fl4, &sk->sk_write_queue, &inet->cork.base, getfrag,
 				from, length, transhdrlen, flags);
 }
 
-ssize_t	ip_append_page(struct sock *sk, struct page *page,
+ssize_t	ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
 		       int offset, size_t size, int flags)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct sk_buff *skb;
 	struct rtable *rt;
 	struct ip_options *opt = NULL;
+	struct inet_cork *cork;
 	int hh_len;
 	int mtu;
 	int len;
@@ -1127,28 +1133,29 @@ ssize_t	ip_append_page(struct sock *sk, struct page *page,
 	if (skb_queue_empty(&sk->sk_write_queue))
 		return -EINVAL;
 
-	rt = (struct rtable *)inet->cork.dst;
-	if (inet->cork.flags & IPCORK_OPT)
-		opt = inet->cork.opt;
+	cork = &inet->cork.base;
+	rt = (struct rtable *)cork->dst;
+	if (cork->flags & IPCORK_OPT)
+		opt = cork->opt;
 
 	if (!(rt->dst.dev->features&NETIF_F_SG))
 		return -EOPNOTSUPP;
 
 	hh_len = LL_RESERVED_SPACE(rt->dst.dev);
-	mtu = inet->cork.fragsize;
+	mtu = cork->fragsize;
 
 	fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
 
-	if (inet->cork.length + size > 0xFFFF - fragheaderlen) {
-		ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport, mtu);
+	if (cork->length + size > 0xFFFF - fragheaderlen) {
+		ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, mtu);
 		return -EMSGSIZE;
 	}
 
 	if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL)
 		return -EINVAL;
 
-	inet->cork.length += size;
+	cork->length += size;
 	if ((size + skb->len > mtu) &&
 	    (sk->sk_protocol == IPPROTO_UDP) &&
 	    (rt->dst.dev->features & NETIF_F_UFO)) {
@@ -1243,7 +1250,7 @@ ssize_t	ip_append_page(struct sock *sk, struct page *page,
 	return 0;
 
 error:
-	inet->cork.length -= size;
+	cork->length -= size;
 	IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTDISCARDS);
 	return err;
 }
@@ -1262,6 +1269,7 @@ static void ip_cork_release(struct inet_cork *cork)
  *	and push them out.
  */
 struct sk_buff *__ip_make_skb(struct sock *sk,
+			      struct flowi4 *fl4,
 			      struct sk_buff_head *queue,
 			      struct inet_cork *cork)
 {
@@ -1319,17 +1327,18 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
 	iph = (struct iphdr *)skb->data;
 	iph->version = 4;
 	iph->ihl = 5;
-	if (opt) {
-		iph->ihl += opt->optlen>>2;
-		ip_options_build(skb, opt, cork->addr, rt, 0);
-	}
 	iph->tos = inet->tos;
 	iph->frag_off = df;
 	ip_select_ident(iph, &rt->dst, sk);
 	iph->ttl = ttl;
 	iph->protocol = sk->sk_protocol;
-	iph->saddr = rt->rt_src;
-	iph->daddr = rt->rt_dst;
+	iph->saddr = fl4->saddr;
+	iph->daddr = fl4->daddr;
+
+	if (opt) {
+		iph->ihl += opt->optlen>>2;
+		ip_options_build(skb, opt, cork->addr, rt, 0);
+	}
 
 	skb->priority = sk->sk_priority;
 	skb->mark = sk->sk_mark;
@@ -1365,11 +1374,11 @@ int ip_send_skb(struct sk_buff *skb)
 	return err;
 }
 
-int ip_push_pending_frames(struct sock *sk)
+int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4)
 {
 	struct sk_buff *skb;
 
-	skb = ip_finish_skb(sk);
+	skb = ip_finish_skb(sk, fl4);
 	if (!skb)
 		return 0;
 
@@ -1394,17 +1403,18 @@ static void __ip_flush_pending_frames(struct sock *sk,
 
 void ip_flush_pending_frames(struct sock *sk)
 {
-	__ip_flush_pending_frames(sk, &sk->sk_write_queue, &inet_sk(sk)->cork);
+	__ip_flush_pending_frames(sk, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
 }
 
 struct sk_buff *ip_make_skb(struct sock *sk,
+			    struct flowi4 *fl4,
 			    int getfrag(void *from, char *to, int offset,
 					int len, int odd, struct sk_buff *skb),
 			    void *from, int length, int transhdrlen,
 			    struct ipcm_cookie *ipc, struct rtable **rtp,
 			    unsigned int flags)
 {
-	struct inet_cork cork = {};
+	struct inet_cork cork;
 	struct sk_buff_head queue;
 	int err;
 
@@ -1413,18 +1423,21 @@ struct sk_buff *ip_make_skb(struct sock *sk,
 
 	__skb_queue_head_init(&queue);
 
+	cork.flags = 0;
+	cork.addr = 0;
+	cork.opt = NULL;
 	err = ip_setup_cork(sk, &cork, ipc, rtp);
 	if (err)
 		return ERR_PTR(err);
 
-	err = __ip_append_data(sk, &queue, &cork, getfrag,
+	err = __ip_append_data(sk, fl4, &queue, &cork, getfrag,
 			       from, length, transhdrlen, flags);
 	if (err) {
 		__ip_flush_pending_frames(sk, &queue, &cork);
 		return ERR_PTR(err);
 	}
 
-	return __ip_make_skb(sk, &queue, &cork);
+	return __ip_make_skb(sk, fl4, &queue, &cork);
 }
 
 /*
@@ -1447,48 +1460,39 @@ static int ip_reply_glue_bits(void *dptr, char *to, int offset,
  *	Should run single threaded per socket because it uses the sock
  *     	structure to pass arguments.
  */
-void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg,
-		   unsigned int len)
+void ip_send_reply(struct sock *sk, struct sk_buff *skb, __be32 daddr,
+		   struct ip_reply_arg *arg, unsigned int len)
 {
 	struct inet_sock *inet = inet_sk(sk);
-	struct {
-		struct ip_options	opt;
-		char			data[40];
-	} replyopts;
+	struct ip_options_data replyopts;
 	struct ipcm_cookie ipc;
-	__be32 daddr;
+	struct flowi4 fl4;
 	struct rtable *rt = skb_rtable(skb);
 
-	if (ip_options_echo(&replyopts.opt, skb))
+	if (ip_options_echo(&replyopts.opt.opt, skb))
 		return;
 
-	daddr = ipc.addr = rt->rt_src;
+	ipc.addr = daddr;
 	ipc.opt = NULL;
 	ipc.tx_flags = 0;
 
-	if (replyopts.opt.optlen) {
+	if (replyopts.opt.opt.optlen) {
 		ipc.opt = &replyopts.opt;
 
-		if (ipc.opt->srr)
-			daddr = replyopts.opt.faddr;
+		if (replyopts.opt.opt.srr)
+			daddr = replyopts.opt.opt.faddr;
 	}
 
-	{
-		struct flowi4 fl4 = {
-			.flowi4_oif = arg->bound_dev_if,
-			.daddr = daddr,
-			.saddr = rt->rt_spec_dst,
-			.flowi4_tos = RT_TOS(ip_hdr(skb)->tos),
-			.fl4_sport = tcp_hdr(skb)->dest,
-			.fl4_dport = tcp_hdr(skb)->source,
-			.flowi4_proto = sk->sk_protocol,
-			.flowi4_flags = ip_reply_arg_flowi_flags(arg),
-		};
-		security_skb_classify_flow(skb, flowi4_to_flowi(&fl4));
-		rt = ip_route_output_key(sock_net(sk), &fl4);
-		if (IS_ERR(rt))
-			return;
-	}
+	flowi4_init_output(&fl4, arg->bound_dev_if, 0,
+			   RT_TOS(ip_hdr(skb)->tos),
+			   RT_SCOPE_UNIVERSE, sk->sk_protocol,
+			   ip_reply_arg_flowi_flags(arg),
+			   daddr, rt->rt_spec_dst,
+			   tcp_hdr(skb)->source, tcp_hdr(skb)->dest);
+	security_skb_classify_flow(skb, flowi4_to_flowi(&fl4));
+	rt = ip_route_output_key(sock_net(sk), &fl4);
+	if (IS_ERR(rt))
+		return;
 
 	/* And let IP do all the hard work.
 
@@ -1501,7 +1505,7 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
 	sk->sk_priority = skb->priority;
 	sk->sk_protocol = ip_hdr(skb)->protocol;
 	sk->sk_bound_dev_if = arg->bound_dev_if;
-	ip_append_data(sk, ip_reply_glue_bits, arg->iov->iov_base, len, 0,
+	ip_append_data(sk, &fl4, ip_reply_glue_bits, arg->iov->iov_base, len, 0,
 		       &ipc, &rt, MSG_DONTWAIT);
 	if ((skb = skb_peek(&sk->sk_write_queue)) != NULL) {
 		if (arg->csumoffset >= 0)
@@ -1509,7 +1513,7 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
 			  arg->csumoffset) = csum_fold(csum_add(skb->csum,
 								arg->csum));
 		skb->ip_summed = CHECKSUM_NONE;
-		ip_push_pending_frames(sk);
+		ip_push_pending_frames(sk, &fl4);
 	}
 
 	bh_unlock_sock(sk);
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 3948c86..ab0c9ef 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -131,7 +131,7 @@ static void ip_cmsg_recv_security(struct msghdr *msg, struct sk_buff *skb)
 static void ip_cmsg_recv_dstaddr(struct msghdr *msg, struct sk_buff *skb)
 {
 	struct sockaddr_in sin;
-	struct iphdr *iph = ip_hdr(skb);
+	const struct iphdr *iph = ip_hdr(skb);
 	__be16 *ports = (__be16 *)skb_transport_header(skb);
 
 	if (skb_transport_offset(skb) + 4 > skb->len)
@@ -451,6 +451,11 @@ out:
 }
 
 
+static void opt_kfree_rcu(struct rcu_head *head)
+{
+	kfree(container_of(head, struct ip_options_rcu, rcu));
+}
+
 /*
  *	Socket option code for IP. This is the end of the line after any
  *	TCP,UDP etc options on an IP socket.
@@ -497,13 +502,16 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 	switch (optname) {
 	case IP_OPTIONS:
 	{
-		struct ip_options *opt = NULL;
+		struct ip_options_rcu *old, *opt = NULL;
+
 		if (optlen > 40)
 			goto e_inval;
 		err = ip_options_get_from_user(sock_net(sk), &opt,
 					       optval, optlen);
 		if (err)
 			break;
+		old = rcu_dereference_protected(inet->inet_opt,
+						sock_owned_by_user(sk));
 		if (inet->is_icsk) {
 			struct inet_connection_sock *icsk = inet_csk(sk);
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
@@ -512,17 +520,18 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 			       (TCPF_LISTEN | TCPF_CLOSE)) &&
 			     inet->inet_daddr != LOOPBACK4_IPV6)) {
 #endif
-				if (inet->opt)
-					icsk->icsk_ext_hdr_len -= inet->opt->optlen;
+				if (old)
+					icsk->icsk_ext_hdr_len -= old->opt.optlen;
 				if (opt)
-					icsk->icsk_ext_hdr_len += opt->optlen;
+					icsk->icsk_ext_hdr_len += opt->opt.optlen;
 				icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
 			}
 #endif
 		}
-		opt = xchg(&inet->opt, opt);
-		kfree(opt);
+		rcu_assign_pointer(inet->inet_opt, opt);
+		if (old)
+			call_rcu(&old->rcu, opt_kfree_rcu);
 		break;
 	}
 	case IP_PKTINFO:
@@ -1081,12 +1090,16 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
 	case IP_OPTIONS:
 	{
 		unsigned char optbuf[sizeof(struct ip_options)+40];
-		struct ip_options * opt = (struct ip_options *)optbuf;
+		struct ip_options *opt = (struct ip_options *)optbuf;
+		struct ip_options_rcu *inet_opt;
+
+		inet_opt = rcu_dereference_protected(inet->inet_opt,
+						     sock_owned_by_user(sk));
 		opt->optlen = 0;
-		if (inet->opt)
-			memcpy(optbuf, inet->opt,
-			       sizeof(struct ip_options)+
-			       inet->opt->optlen);
+		if (inet_opt)
+			memcpy(optbuf, &inet_opt->opt,
+			       sizeof(struct ip_options) +
+			       inet_opt->opt.optlen);
 		release_sock(sk);
 
 		if (opt->optlen == 0)
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 6290675..c857f6f 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -27,7 +27,7 @@ static void ipcomp4_err(struct sk_buff *skb, u32 info)
 {
 	struct net *net = dev_net(skb->dev);
 	__be32 spi;
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	struct ip_comp_hdr *ipch = (struct ip_comp_hdr *)(skb->data+(iph->ihl<<2));
 	struct xfrm_state *x;
 
@@ -36,7 +36,7 @@ static void ipcomp4_err(struct sk_buff *skb, u32 info)
 		return;
 
 	spi = htonl(ntohs(ipch->cpi));
-	x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr,
+	x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
 			      spi, IPPROTO_COMP, AF_INET);
 	if (!x)
 		return;
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index cbff2ec..ab7e554 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -87,8 +87,8 @@
 #endif
 
 /* Define the friendly delay before and after opening net devices */
-#define CONF_PRE_OPEN		500	/* Before opening: 1/2 second */
-#define CONF_POST_OPEN		1	/* After opening: 1 second */
+#define CONF_POST_OPEN		10	/* After opening: 10 msecs */
+#define CONF_CARRIER_TIMEOUT	120000	/* Wait for carrier timeout */
 
 /* Define the timeout for waiting for a DHCP/BOOTP/RARP reply */
 #define CONF_OPEN_RETRIES 	2	/* (Re)open devices twice */
@@ -188,14 +188,14 @@ struct ic_device {
 static struct ic_device *ic_first_dev __initdata = NULL;/* List of open device */
 static struct net_device *ic_dev __initdata = NULL;	/* Selected device */
 
-static bool __init ic_device_match(struct net_device *dev)
+static bool __init ic_is_init_dev(struct net_device *dev)
 {
-	if (user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
+	if (dev->flags & IFF_LOOPBACK)
+		return false;
+	return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
 	    (!(dev->flags & IFF_LOOPBACK) &&
 	     (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) &&
-	     strncmp(dev->name, "dummy", 5)))
-		return true;
-	return false;
+	     strncmp(dev->name, "dummy", 5));
 }
 
 static int __init ic_open_devs(void)
@@ -203,6 +203,7 @@ static int __init ic_open_devs(void)
 	struct ic_device *d, **last;
 	struct net_device *dev;
 	unsigned short oflags;
+	unsigned long start;
 
 	last = &ic_first_dev;
 	rtnl_lock();
@@ -216,9 +217,7 @@ static int __init ic_open_devs(void)
 	}
 
 	for_each_netdev(&init_net, dev) {
-		if (dev->flags & IFF_LOOPBACK)
-			continue;
-		if (ic_device_match(dev)) {
+		if (ic_is_init_dev(dev)) {
 			int able = 0;
 			if (dev->mtu >= 364)
 				able |= IC_BOOTP;
@@ -252,6 +251,17 @@ static int __init ic_open_devs(void)
 				dev->name, able, d->xid));
 		}
 	}
+
+	/* wait for a carrier on at least one device */
+	start = jiffies;
+	while (jiffies - start < msecs_to_jiffies(CONF_CARRIER_TIMEOUT)) {
+		for_each_netdev(&init_net, dev)
+			if (ic_is_init_dev(dev) && netif_carrier_ok(dev))
+				goto have_carrier;
+
+		msleep(1);
+	}
+have_carrier:
 	rtnl_unlock();
 
 	*last = NULL;
@@ -1324,14 +1334,13 @@ static int __init wait_for_devices(void)
 {
 	int i;
 
-	msleep(CONF_PRE_OPEN);
 	for (i = 0; i < DEVICE_WAIT_MAX; i++) {
 		struct net_device *dev;
 		int found = 0;
 
 		rtnl_lock();
 		for_each_netdev(&init_net, dev) {
-			if (ic_device_match(dev)) {
+			if (ic_is_init_dev(dev)) {
 				found = 1;
 				break;
 			}
@@ -1378,7 +1387,7 @@ static int __init ip_auto_config(void)
 		return err;
 
 	/* Give drivers a chance to settle */
-	ssleep(CONF_POST_OPEN);
+	msleep(CONF_POST_OPEN);
 
 	/*
 	 * If the config information is insufficient (e.g., our IP address or
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index bfc17c5..378b20b 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -276,11 +276,6 @@ static struct ip_tunnel * ipip_tunnel_locate(struct net *net,
 
 	dev_net_set(dev, net);
 
-	if (strchr(name, '%')) {
-		if (dev_alloc_name(dev, name) < 0)
-			goto failed_free;
-	}
-
 	nt = netdev_priv(dev);
 	nt->parms = *parms;
 
@@ -319,7 +314,7 @@ static int ipip_err(struct sk_buff *skb, u32 info)
    8 bytes of packet payload. It means, that precise relaying of
    ICMP in the real Internet is absolutely infeasible.
  */
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	const int type = icmp_hdr(skb)->type;
 	const int code = icmp_hdr(skb)->code;
 	struct ip_tunnel *t;
@@ -433,15 +428,16 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	struct pcpu_tstats *tstats;
-	struct iphdr  *tiph = &tunnel->parms.iph;
+	const struct iphdr  *tiph = &tunnel->parms.iph;
 	u8     tos = tunnel->parms.iph.tos;
 	__be16 df = tiph->frag_off;
 	struct rtable *rt;     			/* Route to the other host */
 	struct net_device *tdev;		/* Device to other host */
-	struct iphdr  *old_iph = ip_hdr(skb);
+	const struct iphdr  *old_iph = ip_hdr(skb);
 	struct iphdr  *iph;			/* Our new IP header */
 	unsigned int max_headroom;		/* The extra header space needed */
 	__be32 dst = tiph->daddr;
+	struct flowi4 fl4;
 	int    mtu;
 
 	if (skb->protocol != htons(ETH_P_IP))
@@ -460,7 +456,7 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 			goto tx_error_icmp;
 	}
 
-	rt = ip_route_output_ports(dev_net(dev), NULL,
+	rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
 				   dst, tiph->saddr,
 				   0, 0,
 				   IPPROTO_IPIP, RT_TOS(tos),
@@ -549,8 +545,8 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	iph->frag_off		=	df;
 	iph->protocol		=	IPPROTO_IPIP;
 	iph->tos		=	INET_ECN_encapsulate(tos, old_iph->tos);
-	iph->daddr		=	rt->rt_dst;
-	iph->saddr		=	rt->rt_src;
+	iph->daddr		=	fl4.daddr;
+	iph->saddr		=	fl4.saddr;
 
 	if ((iph->ttl = tiph->ttl) == 0)
 		iph->ttl	=	old_iph->ttl;
@@ -572,19 +568,21 @@ static void ipip_tunnel_bind_dev(struct net_device *dev)
 {
 	struct net_device *tdev = NULL;
 	struct ip_tunnel *tunnel;
-	struct iphdr *iph;
+	const struct iphdr *iph;
 
 	tunnel = netdev_priv(dev);
 	iph = &tunnel->parms.iph;
 
 	if (iph->daddr) {
-		struct rtable *rt = ip_route_output_ports(dev_net(dev), NULL,
-							  iph->daddr, iph->saddr,
-							  0, 0,
-							  IPPROTO_IPIP,
-							  RT_TOS(iph->tos),
-							  tunnel->parms.link);
-
+		struct rtable *rt;
+		struct flowi4 fl4;
+
+		rt = ip_route_output_ports(dev_net(dev), &fl4, NULL,
+					   iph->daddr, iph->saddr,
+					   0, 0,
+					   IPPROTO_IPIP,
+					   RT_TOS(iph->tos),
+					   tunnel->parms.link);
 		if (!IS_ERR(rt)) {
 			tdev = rt->dst.dev;
 			ip_rt_put(rt);
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 1f62eae..30a7763 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1549,7 +1549,7 @@ static struct notifier_block ip_mr_notifier = {
 static void ip_encap(struct sk_buff *skb, __be32 saddr, __be32 daddr)
 {
 	struct iphdr *iph;
-	struct iphdr *old_iph = ip_hdr(skb);
+	const struct iphdr *old_iph = ip_hdr(skb);
 
 	skb_push(skb, sizeof(struct iphdr));
 	skb->transport_header = skb->network_header;
@@ -1595,6 +1595,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
 	struct vif_device *vif = &mrt->vif_table[vifi];
 	struct net_device *dev;
 	struct rtable *rt;
+	struct flowi4 fl4;
 	int    encap = 0;
 
 	if (vif->dev == NULL)
@@ -1612,7 +1613,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
 #endif
 
 	if (vif->flags & VIFF_TUNNEL) {
-		rt = ip_route_output_ports(net, NULL,
+		rt = ip_route_output_ports(net, &fl4, NULL,
 					   vif->remote, vif->local,
 					   0, 0,
 					   IPPROTO_IPIP,
@@ -1621,7 +1622,7 @@ static void ipmr_queue_xmit(struct net *net, struct mr_table *mrt,
 			goto out_free;
 		encap = sizeof(struct iphdr);
 	} else {
-		rt = ip_route_output_ports(net, NULL, iph->daddr, 0,
+		rt = ip_route_output_ports(net, &fl4, NULL, iph->daddr, 0,
 					   0, 0,
 					   IPPROTO_IPIP,
 					   RT_TOS(iph->tos), vif->link);
@@ -1788,12 +1789,14 @@ dont_forward:
 	return 0;
 }
 
-static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct rtable *rt)
+static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb)
 {
+	struct rtable *rt = skb_rtable(skb);
+	struct iphdr *iph = ip_hdr(skb);
 	struct flowi4 fl4 = {
-		.daddr = rt->rt_key_dst,
-		.saddr = rt->rt_key_src,
-		.flowi4_tos = rt->rt_tos,
+		.daddr = iph->daddr,
+		.saddr = iph->saddr,
+		.flowi4_tos = iph->tos,
 		.flowi4_oif = rt->rt_oif,
 		.flowi4_iif = rt->rt_iif,
 		.flowi4_mark = rt->rt_mark,
@@ -1825,7 +1828,7 @@ int ip_mr_input(struct sk_buff *skb)
 	if (IPCB(skb)->flags & IPSKB_FORWARDED)
 		goto dont_forward;
 
-	mrt = ipmr_rt_fib_lookup(net, skb_rtable(skb));
+	mrt = ipmr_rt_fib_lookup(net, skb);
 	if (IS_ERR(mrt)) {
 		kfree_skb(skb);
 		return PTR_ERR(mrt);
@@ -1957,7 +1960,7 @@ int pim_rcv_v1(struct sk_buff *skb)
 
 	pim = igmp_hdr(skb);
 
-	mrt = ipmr_rt_fib_lookup(net, skb_rtable(skb));
+	mrt = ipmr_rt_fib_lookup(net, skb);
 	if (IS_ERR(mrt))
 		goto drop;
 	if (!mrt->mroute_do_pim ||
@@ -1989,7 +1992,7 @@ static int pim_rcv(struct sk_buff *skb)
 	     csum_fold(skb_checksum(skb, 0, skb->len, 0))))
 		goto drop;
 
-	mrt = ipmr_rt_fib_lookup(net, skb_rtable(skb));
+	mrt = ipmr_rt_fib_lookup(net, skb);
 	if (IS_ERR(mrt))
 		goto drop;
 	if (__pim_rcv(mrt, skb, sizeof(*pim))) {
@@ -2038,20 +2041,20 @@ rtattr_failure:
 	return -EMSGSIZE;
 }
 
-int ipmr_get_route(struct net *net,
-		   struct sk_buff *skb, struct rtmsg *rtm, int nowait)
+int ipmr_get_route(struct net *net, struct sk_buff *skb,
+		   __be32 saddr, __be32 daddr,
+		   struct rtmsg *rtm, int nowait)
 {
-	int err;
-	struct mr_table *mrt;
 	struct mfc_cache *cache;
-	struct rtable *rt = skb_rtable(skb);
+	struct mr_table *mrt;
+	int err;
 
 	mrt = ipmr_get_table(net, RT_TABLE_DEFAULT);
 	if (mrt == NULL)
 		return -ENOENT;
 
 	rcu_read_lock();
-	cache = ipmr_cache_find(mrt, rt->rt_src, rt->rt_dst);
+	cache = ipmr_cache_find(mrt, saddr, daddr);
 
 	if (cache == NULL) {
 		struct sk_buff *skb2;
@@ -2084,8 +2087,8 @@ int ipmr_get_route(struct net *net,
 		skb_reset_network_header(skb2);
 		iph = ip_hdr(skb2);
 		iph->ihl = sizeof(struct iphdr) >> 2;
-		iph->saddr = rt->rt_src;
-		iph->daddr = rt->rt_dst;
+		iph->saddr = saddr;
+		iph->daddr = daddr;
 		iph->version = 0;
 		err = ipmr_cache_unresolved(mrt, vif, skb2);
 		read_unlock(&mrt_lock);
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 89bc7e6..fd7a3f6 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -260,6 +260,7 @@ unsigned int arpt_do_table(struct sk_buff *skb,
 	void *table_base;
 	const struct xt_table_info *private;
 	struct xt_action_param acpar;
+	unsigned int addend;
 
 	if (!pskb_may_pull(skb, arp_hdr_len(skb->dev)))
 		return NF_DROP;
@@ -267,7 +268,8 @@ unsigned int arpt_do_table(struct sk_buff *skb,
 	indev = in ? in->name : nulldevname;
 	outdev = out ? out->name : nulldevname;
 
-	xt_info_rdlock_bh();
+	local_bh_disable();
+	addend = xt_write_recseq_begin();
 	private = table->private;
 	table_base = private->entries[smp_processor_id()];
 
@@ -338,7 +340,8 @@ unsigned int arpt_do_table(struct sk_buff *skb,
 			/* Verdict */
 			break;
 	} while (!acpar.hotdrop);
-	xt_info_rdunlock_bh();
+	xt_write_recseq_end(addend);
+	local_bh_enable();
 
 	if (acpar.hotdrop)
 		return NF_DROP;
@@ -712,7 +715,7 @@ static void get_counters(const struct xt_table_info *t,
 	unsigned int i;
 
 	for_each_possible_cpu(cpu) {
-		seqlock_t *lock = &per_cpu(xt_info_locks, cpu).lock;
+		seqcount_t *s = &per_cpu(xt_recseq, cpu);
 
 		i = 0;
 		xt_entry_foreach(iter, t->entries[cpu], t->size) {
@@ -720,10 +723,10 @@ static void get_counters(const struct xt_table_info *t,
 			unsigned int start;
 
 			do {
-				start = read_seqbegin(lock);
+				start = read_seqcount_begin(s);
 				bcnt = iter->counters.bcnt;
 				pcnt = iter->counters.pcnt;
-			} while (read_seqretry(lock, start));
+			} while (read_seqcount_retry(s, start));
 
 			ADD_COUNTER(counters[i], bcnt, pcnt);
 			++i;
@@ -1115,6 +1118,7 @@ static int do_add_counters(struct net *net, const void __user *user,
 	int ret = 0;
 	void *loc_cpu_entry;
 	struct arpt_entry *iter;
+	unsigned int addend;
 #ifdef CONFIG_COMPAT
 	struct compat_xt_counters_info compat_tmp;
 
@@ -1171,12 +1175,12 @@ static int do_add_counters(struct net *net, const void __user *user,
 	/* Choose the copy that is on our node */
 	curcpu = smp_processor_id();
 	loc_cpu_entry = private->entries[curcpu];
-	xt_info_wrlock(curcpu);
+	addend = xt_write_recseq_begin();
 	xt_entry_foreach(iter, loc_cpu_entry, private->size) {
 		ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt);
 		++i;
 	}
-	xt_info_wrunlock(curcpu);
+	xt_write_recseq_end(addend);
  unlock_up_free:
 	local_bh_enable();
 	xt_table_unlock(t);
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 7049150..7647438 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -68,15 +68,6 @@ void *ipt_alloc_initial_table(const struct xt_table *info)
 }
 EXPORT_SYMBOL_GPL(ipt_alloc_initial_table);
 
-/*
-   We keep a set of rules for each CPU, so we can avoid write-locking
-   them in the softirq when updating the counters and therefore
-   only need to read-lock in the softirq; doing a write_lock_bh() in user
-   context stops packets coming through and allows user context to read
-   the counters or update the rules.
-
-   Hence the start of any table is given by get_table() below.  */
-
 /* Returns whether matches rule or not. */
 /* Performance critical - called for every packet */
 static inline bool
@@ -311,6 +302,7 @@ ipt_do_table(struct sk_buff *skb,
 	unsigned int *stackptr, origptr, cpu;
 	const struct xt_table_info *private;
 	struct xt_action_param acpar;
+	unsigned int addend;
 
 	/* Initialization */
 	ip = ip_hdr(skb);
@@ -331,7 +323,8 @@ ipt_do_table(struct sk_buff *skb,
 	acpar.hooknum = hook;
 
 	IP_NF_ASSERT(table->valid_hooks & (1 << hook));
-	xt_info_rdlock_bh();
+	local_bh_disable();
+	addend = xt_write_recseq_begin();
 	private = table->private;
 	cpu        = smp_processor_id();
 	table_base = private->entries[cpu];
@@ -430,7 +423,9 @@ ipt_do_table(struct sk_buff *skb,
 	pr_debug("Exiting %s; resetting sp from %u to %u\n",
 		 __func__, *stackptr, origptr);
 	*stackptr = origptr;
-	xt_info_rdunlock_bh();
+ 	xt_write_recseq_end(addend);
+ 	local_bh_enable();
+
 #ifdef DEBUG_ALLOW_ALL
 	return NF_ACCEPT;
 #else
@@ -886,7 +881,7 @@ get_counters(const struct xt_table_info *t,
 	unsigned int i;
 
 	for_each_possible_cpu(cpu) {
-		seqlock_t *lock = &per_cpu(xt_info_locks, cpu).lock;
+		seqcount_t *s = &per_cpu(xt_recseq, cpu);
 
 		i = 0;
 		xt_entry_foreach(iter, t->entries[cpu], t->size) {
@@ -894,10 +889,10 @@ get_counters(const struct xt_table_info *t,
 			unsigned int start;
 
 			do {
-				start = read_seqbegin(lock);
+				start = read_seqcount_begin(s);
 				bcnt = iter->counters.bcnt;
 				pcnt = iter->counters.pcnt;
-			} while (read_seqretry(lock, start));
+			} while (read_seqcount_retry(s, start));
 
 			ADD_COUNTER(counters[i], bcnt, pcnt);
 			++i; /* macro does multi eval of i */
@@ -1312,6 +1307,7 @@ do_add_counters(struct net *net, const void __user *user,
 	int ret = 0;
 	void *loc_cpu_entry;
 	struct ipt_entry *iter;
+	unsigned int addend;
 #ifdef CONFIG_COMPAT
 	struct compat_xt_counters_info compat_tmp;
 
@@ -1368,12 +1364,12 @@ do_add_counters(struct net *net, const void __user *user,
 	/* Choose the copy that is on our node */
 	curcpu = smp_processor_id();
 	loc_cpu_entry = private->entries[curcpu];
-	xt_info_wrlock(curcpu);
+	addend = xt_write_recseq_begin();
 	xt_entry_foreach(iter, loc_cpu_entry, private->size) {
 		ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt);
 		++i;
 	}
-	xt_info_wrunlock(curcpu);
+	xt_write_recseq_end(addend);
  unlock_up_free:
 	local_bh_enable();
 	xt_table_unlock(t);
diff --git a/net/ipv4/netfilter/nf_nat_helper.c b/net/ipv4/netfilter/nf_nat_helper.c
index 31427fb..99cfa28 100644
--- a/net/ipv4/netfilter/nf_nat_helper.c
+++ b/net/ipv4/netfilter/nf_nat_helper.c
@@ -153,7 +153,7 @@ void nf_nat_set_seq_adjust(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 }
 EXPORT_SYMBOL_GPL(nf_nat_set_seq_adjust);
 
-static void nf_nat_csum(struct sk_buff *skb, struct iphdr *iph, void *data,
+static void nf_nat_csum(struct sk_buff *skb, const struct iphdr *iph, void *data,
 			int datalen, __sum16 *check, int oldlen)
 {
 	struct rtable *rt = skb_rtable(skb);
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
new file mode 100644
index 0000000..1f3bb11
--- /dev/null
+++ b/net/ipv4/ping.c
@@ -0,0 +1,935 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		"Ping" sockets
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ * Based on ipv4/udp.c code.
+ *
+ * Authors:	Vasiliy Kulikov / Openwall (for Linux 2.6),
+ *		Pavel Kankovsky (for Linux 2.4.32)
+ *
+ * Pavel gave all rights to bugs to Vasiliy,
+ * none of the bugs are Pavel's now.
+ *
+ */
+
+#include <asm/system.h>
+#include <linux/uaccess.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <net/snmp.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/icmp.h>
+#include <net/protocol.h>
+#include <linux/skbuff.h>
+#include <linux/proc_fs.h>
+#include <net/sock.h>
+#include <net/ping.h>
+#include <net/icmp.h>
+#include <net/udp.h>
+#include <net/route.h>
+#include <net/inet_common.h>
+#include <net/checksum.h>
+
+
+static struct ping_table ping_table;
+
+static u16 ping_port_rover;
+
+static inline int ping_hashfn(struct net *net, unsigned num, unsigned mask)
+{
+	int res = (num + net_hash_mix(net)) & mask;
+	pr_debug("hash(%d) = %d\n", num, res);
+	return res;
+}
+
+static inline struct hlist_nulls_head *ping_hashslot(struct ping_table *table,
+					     struct net *net, unsigned num)
+{
+	return &table->hash[ping_hashfn(net, num, PING_HTABLE_MASK)];
+}
+
+static int ping_v4_get_port(struct sock *sk, unsigned short ident)
+{
+	struct hlist_nulls_node *node;
+	struct hlist_nulls_head *hlist;
+	struct inet_sock *isk, *isk2;
+	struct sock *sk2 = NULL;
+
+	isk = inet_sk(sk);
+	write_lock_bh(&ping_table.lock);
+	if (ident == 0) {
+		u32 i;
+		u16 result = ping_port_rover + 1;
+
+		for (i = 0; i < (1L << 16); i++, result++) {
+			if (!result)
+				result++; /* avoid zero */
+			hlist = ping_hashslot(&ping_table, sock_net(sk),
+					    result);
+			ping_portaddr_for_each_entry(sk2, node, hlist) {
+				isk2 = inet_sk(sk2);
+
+				if (isk2->inet_num == result)
+					goto next_port;
+			}
+
+			/* found */
+			ping_port_rover = ident = result;
+			break;
+next_port:
+			;
+		}
+		if (i >= (1L << 16))
+			goto fail;
+	} else {
+		hlist = ping_hashslot(&ping_table, sock_net(sk), ident);
+		ping_portaddr_for_each_entry(sk2, node, hlist) {
+			isk2 = inet_sk(sk2);
+
+			if ((isk2->inet_num == ident) &&
+			    (sk2 != sk) &&
+			    (!sk2->sk_reuse || !sk->sk_reuse))
+				goto fail;
+		}
+	}
+
+	pr_debug("found port/ident = %d\n", ident);
+	isk->inet_num = ident;
+	if (sk_unhashed(sk)) {
+		pr_debug("was not hashed\n");
+		sock_hold(sk);
+		hlist_nulls_add_head(&sk->sk_nulls_node, hlist);
+		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+	}
+	write_unlock_bh(&ping_table.lock);
+	return 0;
+
+fail:
+	write_unlock_bh(&ping_table.lock);
+	return 1;
+}
+
+static void ping_v4_hash(struct sock *sk)
+{
+	pr_debug("ping_v4_hash(sk->port=%u)\n", inet_sk(sk)->inet_num);
+	BUG(); /* "Please do not press this button again." */
+}
+
+static void ping_v4_unhash(struct sock *sk)
+{
+	struct inet_sock *isk = inet_sk(sk);
+	pr_debug("ping_v4_unhash(isk=%p,isk->num=%u)\n", isk, isk->inet_num);
+	if (sk_hashed(sk)) {
+		struct hlist_nulls_head *hslot;
+
+		hslot = ping_hashslot(&ping_table, sock_net(sk), isk->inet_num);
+		write_lock_bh(&ping_table.lock);
+		hlist_nulls_del(&sk->sk_nulls_node);
+		sock_put(sk);
+		isk->inet_num = isk->inet_sport = 0;
+		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+		write_unlock_bh(&ping_table.lock);
+	}
+}
+
+static struct sock *ping_v4_lookup(struct net *net, u32 saddr, u32 daddr,
+				   u16 ident, int dif)
+{
+	struct hlist_nulls_head *hslot = ping_hashslot(&ping_table, net, ident);
+	struct sock *sk = NULL;
+	struct inet_sock *isk;
+	struct hlist_nulls_node *hnode;
+
+	pr_debug("try to find: num = %d, daddr = %ld, dif = %d\n",
+			 (int)ident, (unsigned long)daddr, dif);
+	read_lock_bh(&ping_table.lock);
+
+	ping_portaddr_for_each_entry(sk, hnode, hslot) {
+		isk = inet_sk(sk);
+
+		pr_debug("found: %p: num = %d, daddr = %ld, dif = %d\n", sk,
+			 (int)isk->inet_num, (unsigned long)isk->inet_rcv_saddr,
+			 sk->sk_bound_dev_if);
+
+		pr_debug("iterate\n");
+		if (isk->inet_num != ident)
+			continue;
+		if (isk->inet_rcv_saddr && isk->inet_rcv_saddr != daddr)
+			continue;
+		if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
+			continue;
+
+		sock_hold(sk);
+		goto exit;
+	}
+
+	sk = NULL;
+exit:
+	read_unlock_bh(&ping_table.lock);
+
+	return sk;
+}
+
+static void inet_get_ping_group_range_net(struct net *net, gid_t *low,
+					  gid_t *high)
+{
+	gid_t *data = net->ipv4.sysctl_ping_group_range;
+	unsigned seq;
+	do {
+		seq = read_seqbegin(&sysctl_local_ports.lock);
+
+		*low = data[0];
+		*high = data[1];
+	} while (read_seqretry(&sysctl_local_ports.lock, seq));
+}
+
+
+static int ping_init_sock(struct sock *sk)
+{
+	struct net *net = sock_net(sk);
+	gid_t group = current_egid();
+	gid_t range[2];
+	struct group_info *group_info = get_current_groups();
+	int i, j, count = group_info->ngroups;
+
+	inet_get_ping_group_range_net(net, range, range+1);
+	if (range[0] <= group && group <= range[1])
+		return 0;
+
+	for (i = 0; i < group_info->nblocks; i++) {
+		int cp_count = min_t(int, NGROUPS_PER_BLOCK, count);
+
+		for (j = 0; j < cp_count; j++) {
+			group = group_info->blocks[i][j];
+			if (range[0] <= group && group <= range[1])
+				return 0;
+		}
+
+		count -= cp_count;
+	}
+
+	return -EACCES;
+}
+
+static void ping_close(struct sock *sk, long timeout)
+{
+	pr_debug("ping_close(sk=%p,sk->num=%u)\n",
+		inet_sk(sk), inet_sk(sk)->inet_num);
+	pr_debug("isk->refcnt = %d\n", sk->sk_refcnt.counter);
+
+	sk_common_release(sk);
+}
+
+/*
+ * We need our own bind because there are no privileged id's == local ports.
+ * Moreover, we don't allow binding to multi- and broadcast addresses.
+ */
+
+static int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
+{
+	struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
+	struct inet_sock *isk = inet_sk(sk);
+	unsigned short snum;
+	int chk_addr_ret;
+	int err;
+
+	if (addr_len < sizeof(struct sockaddr_in))
+		return -EINVAL;
+
+	pr_debug("ping_v4_bind(sk=%p,sa_addr=%08x,sa_port=%d)\n",
+		sk, addr->sin_addr.s_addr, ntohs(addr->sin_port));
+
+	chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
+	if (addr->sin_addr.s_addr == INADDR_ANY)
+		chk_addr_ret = RTN_LOCAL;
+
+	if ((sysctl_ip_nonlocal_bind == 0 &&
+	    isk->freebind == 0 && isk->transparent == 0 &&
+	     chk_addr_ret != RTN_LOCAL) ||
+	    chk_addr_ret == RTN_MULTICAST ||
+	    chk_addr_ret == RTN_BROADCAST)
+		return -EADDRNOTAVAIL;
+
+	lock_sock(sk);
+
+	err = -EINVAL;
+	if (isk->inet_num != 0)
+		goto out;
+
+	err = -EADDRINUSE;
+	isk->inet_rcv_saddr = isk->inet_saddr = addr->sin_addr.s_addr;
+	snum = ntohs(addr->sin_port);
+	if (ping_v4_get_port(sk, snum) != 0) {
+		isk->inet_saddr = isk->inet_rcv_saddr = 0;
+		goto out;
+	}
+
+	pr_debug("after bind(): num = %d, daddr = %ld, dif = %d\n",
+		(int)isk->inet_num,
+		(unsigned long) isk->inet_rcv_saddr,
+		(int)sk->sk_bound_dev_if);
+
+	err = 0;
+	if (isk->inet_rcv_saddr)
+		sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
+	if (snum)
+		sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
+	isk->inet_sport = htons(isk->inet_num);
+	isk->inet_daddr = 0;
+	isk->inet_dport = 0;
+	sk_dst_reset(sk);
+out:
+	release_sock(sk);
+	pr_debug("ping_v4_bind -> %d\n", err);
+	return err;
+}
+
+/*
+ * Is this a supported type of ICMP message?
+ */
+
+static inline int ping_supported(int type, int code)
+{
+	if (type == ICMP_ECHO && code == 0)
+		return 1;
+	return 0;
+}
+
+/*
+ * This routine is called by the ICMP module when it gets some
+ * sort of error condition.
+ */
+
+static int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
+
+void ping_err(struct sk_buff *skb, u32 info)
+{
+	struct iphdr *iph = (struct iphdr *)skb->data;
+	struct icmphdr *icmph = (struct icmphdr *)(skb->data+(iph->ihl<<2));
+	struct inet_sock *inet_sock;
+	int type = icmph->type;
+	int code = icmph->code;
+	struct net *net = dev_net(skb->dev);
+	struct sock *sk;
+	int harderr;
+	int err;
+
+	/* We assume the packet has already been checked by icmp_unreach */
+
+	if (!ping_supported(icmph->type, icmph->code))
+		return;
+
+	pr_debug("ping_err(type=%04x,code=%04x,id=%04x,seq=%04x)\n", type,
+		code, ntohs(icmph->un.echo.id), ntohs(icmph->un.echo.sequence));
+
+	sk = ping_v4_lookup(net, iph->daddr, iph->saddr,
+			    ntohs(icmph->un.echo.id), skb->dev->ifindex);
+	if (sk == NULL) {
+		ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
+		pr_debug("no socket, dropping\n");
+		return;	/* No socket for error */
+	}
+	pr_debug("err on socket %p\n", sk);
+
+	err = 0;
+	harderr = 0;
+	inet_sock = inet_sk(sk);
+
+	switch (type) {
+	default:
+	case ICMP_TIME_EXCEEDED:
+		err = EHOSTUNREACH;
+		break;
+	case ICMP_SOURCE_QUENCH:
+		/* This is not a real error but ping wants to see it.
+		 * Report it with some fake errno. */
+		err = EREMOTEIO;
+		break;
+	case ICMP_PARAMETERPROB:
+		err = EPROTO;
+		harderr = 1;
+		break;
+	case ICMP_DEST_UNREACH:
+		if (code == ICMP_FRAG_NEEDED) { /* Path MTU discovery */
+			if (inet_sock->pmtudisc != IP_PMTUDISC_DONT) {
+				err = EMSGSIZE;
+				harderr = 1;
+				break;
+			}
+			goto out;
+		}
+		err = EHOSTUNREACH;
+		if (code <= NR_ICMP_UNREACH) {
+			harderr = icmp_err_convert[code].fatal;
+			err = icmp_err_convert[code].errno;
+		}
+		break;
+	case ICMP_REDIRECT:
+		/* See ICMP_SOURCE_QUENCH */
+		err = EREMOTEIO;
+		break;
+	}
+
+	/*
+	 *      RFC1122: OK.  Passes ICMP errors back to application, as per
+	 *	4.1.3.3.
+	 */
+	if (!inet_sock->recverr) {
+		if (!harderr || sk->sk_state != TCP_ESTABLISHED)
+			goto out;
+	} else {
+		ip_icmp_error(sk, skb, err, 0 /* no remote port */,
+			 info, (u8 *)icmph);
+	}
+	sk->sk_err = err;
+	sk->sk_error_report(sk);
+out:
+	sock_put(sk);
+}
+
+/*
+ *	Copy and checksum an ICMP Echo packet from user space into a buffer.
+ */
+
+struct pingfakehdr {
+	struct icmphdr icmph;
+	struct iovec *iov;
+	u32 wcheck;
+};
+
+static int ping_getfrag(void *from, char * to,
+			int offset, int fraglen, int odd, struct sk_buff *skb)
+{
+	struct pingfakehdr *pfh = (struct pingfakehdr *)from;
+
+	if (offset == 0) {
+		if (fraglen < sizeof(struct icmphdr))
+			BUG();
+		if (csum_partial_copy_fromiovecend(to + sizeof(struct icmphdr),
+			    pfh->iov, 0, fraglen - sizeof(struct icmphdr),
+			    &pfh->wcheck))
+			return -EFAULT;
+
+		return 0;
+	}
+	if (offset < sizeof(struct icmphdr))
+		BUG();
+	if (csum_partial_copy_fromiovecend
+			(to, pfh->iov, offset - sizeof(struct icmphdr),
+			 fraglen, &pfh->wcheck))
+		return -EFAULT;
+	return 0;
+}
+
+static int ping_push_pending_frames(struct sock *sk, struct pingfakehdr *pfh,
+				    struct flowi4 *fl4)
+{
+	struct sk_buff *skb = skb_peek(&sk->sk_write_queue);
+
+	pfh->wcheck = csum_partial((char *)&pfh->icmph,
+		sizeof(struct icmphdr), pfh->wcheck);
+	pfh->icmph.checksum = csum_fold(pfh->wcheck);
+	memcpy(icmp_hdr(skb), &pfh->icmph, sizeof(struct icmphdr));
+	skb->ip_summed = CHECKSUM_NONE;
+	return ip_push_pending_frames(sk, fl4);
+}
+
+static int ping_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+			size_t len)
+{
+	struct net *net = sock_net(sk);
+	struct flowi4 fl4;
+	struct inet_sock *inet = inet_sk(sk);
+	struct ipcm_cookie ipc;
+	struct icmphdr user_icmph;
+	struct pingfakehdr pfh;
+	struct rtable *rt = NULL;
+	struct ip_options_data opt_copy;
+	int free = 0;
+	u32 saddr, daddr, faddr;
+	u8  tos;
+	int err;
+
+	pr_debug("ping_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
+
+
+	if (len > 0xFFFF)
+		return -EMSGSIZE;
+
+	/*
+	 *	Check the flags.
+	 */
+
+	/* Mirror BSD error message compatibility */
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	/*
+	 *	Fetch the ICMP header provided by the userland.
+	 *	iovec is modified!
+	 */
+
+	if (memcpy_fromiovec((u8 *)&user_icmph, msg->msg_iov,
+			     sizeof(struct icmphdr)))
+		return -EFAULT;
+	if (!ping_supported(user_icmph.type, user_icmph.code))
+		return -EINVAL;
+
+	/*
+	 *	Get and verify the address.
+	 */
+
+	if (msg->msg_name) {
+		struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name;
+		if (msg->msg_namelen < sizeof(*usin))
+			return -EINVAL;
+		if (usin->sin_family != AF_INET)
+			return -EINVAL;
+		daddr = usin->sin_addr.s_addr;
+		/* no remote port */
+	} else {
+		if (sk->sk_state != TCP_ESTABLISHED)
+			return -EDESTADDRREQ;
+		daddr = inet->inet_daddr;
+		/* no remote port */
+	}
+
+	ipc.addr = inet->inet_saddr;
+	ipc.opt = NULL;
+	ipc.oif = sk->sk_bound_dev_if;
+	ipc.tx_flags = 0;
+	err = sock_tx_timestamp(sk, &ipc.tx_flags);
+	if (err)
+		return err;
+
+	if (msg->msg_controllen) {
+		err = ip_cmsg_send(sock_net(sk), msg, &ipc);
+		if (err)
+			return err;
+		if (ipc.opt)
+			free = 1;
+	}
+	if (!ipc.opt) {
+		struct ip_options_rcu *inet_opt;
+
+		rcu_read_lock();
+		inet_opt = rcu_dereference(inet->inet_opt);
+		if (inet_opt) {
+			memcpy(&opt_copy, inet_opt,
+			       sizeof(*inet_opt) + inet_opt->opt.optlen);
+			ipc.opt = &opt_copy.opt;
+		}
+		rcu_read_unlock();
+	}
+
+	saddr = ipc.addr;
+	ipc.addr = faddr = daddr;
+
+	if (ipc.opt && ipc.opt->opt.srr) {
+		if (!daddr)
+			return -EINVAL;
+		faddr = ipc.opt->opt.faddr;
+	}
+	tos = RT_TOS(inet->tos);
+	if (sock_flag(sk, SOCK_LOCALROUTE) ||
+	    (msg->msg_flags & MSG_DONTROUTE) ||
+	    (ipc.opt && ipc.opt->opt.is_strictroute)) {
+		tos |= RTO_ONLINK;
+	}
+
+	if (ipv4_is_multicast(daddr)) {
+		if (!ipc.oif)
+			ipc.oif = inet->mc_index;
+		if (!saddr)
+			saddr = inet->mc_addr;
+	}
+
+	flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
+			   RT_SCOPE_UNIVERSE, sk->sk_protocol,
+			   inet_sk_flowi_flags(sk), faddr, saddr, 0, 0);
+
+	security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
+	rt = ip_route_output_flow(net, &fl4, sk);
+	if (IS_ERR(rt)) {
+		err = PTR_ERR(rt);
+		rt = NULL;
+		if (err == -ENETUNREACH)
+			IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
+		goto out;
+	}
+
+	err = -EACCES;
+	if ((rt->rt_flags & RTCF_BROADCAST) &&
+	    !sock_flag(sk, SOCK_BROADCAST))
+		goto out;
+
+	if (msg->msg_flags & MSG_CONFIRM)
+		goto do_confirm;
+back_from_confirm:
+
+	if (!ipc.addr)
+		ipc.addr = fl4.daddr;
+
+	lock_sock(sk);
+
+	pfh.icmph.type = user_icmph.type; /* already checked */
+	pfh.icmph.code = user_icmph.code; /* ditto */
+	pfh.icmph.checksum = 0;
+	pfh.icmph.un.echo.id = inet->inet_sport;
+	pfh.icmph.un.echo.sequence = user_icmph.un.echo.sequence;
+	pfh.iov = msg->msg_iov;
+	pfh.wcheck = 0;
+
+	err = ip_append_data(sk, &fl4, ping_getfrag, &pfh, len,
+			0, &ipc, &rt, msg->msg_flags);
+	if (err)
+		ip_flush_pending_frames(sk);
+	else
+		err = ping_push_pending_frames(sk, &pfh, &fl4);
+	release_sock(sk);
+
+out:
+	ip_rt_put(rt);
+	if (free)
+		kfree(ipc.opt);
+	if (!err) {
+		icmp_out_count(sock_net(sk), user_icmph.type);
+		return len;
+	}
+	return err;
+
+do_confirm:
+	dst_confirm(&rt->dst);
+	if (!(msg->msg_flags & MSG_PROBE) || len)
+		goto back_from_confirm;
+	err = 0;
+	goto out;
+}
+
+static int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+			size_t len, int noblock, int flags, int *addr_len)
+{
+	struct inet_sock *isk = inet_sk(sk);
+	struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
+	struct sk_buff *skb;
+	int copied, err;
+
+	pr_debug("ping_recvmsg(sk=%p,sk->num=%u)\n", isk, isk->inet_num);
+
+	if (flags & MSG_OOB)
+		goto out;
+
+	if (addr_len)
+		*addr_len = sizeof(*sin);
+
+	if (flags & MSG_ERRQUEUE)
+		return ip_recv_error(sk, msg, len);
+
+	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	if (!skb)
+		goto out;
+
+	copied = skb->len;
+	if (copied > len) {
+		msg->msg_flags |= MSG_TRUNC;
+		copied = len;
+	}
+
+	/* Don't bother checking the checksum */
+	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+	if (err)
+		goto done;
+
+	sock_recv_timestamp(msg, sk, skb);
+
+	/* Copy the address. */
+	if (sin) {
+		sin->sin_family = AF_INET;
+		sin->sin_port = 0 /* skb->h.uh->source */;
+		sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
+		memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
+	}
+	if (isk->cmsg_flags)
+		ip_cmsg_recv(msg, skb);
+	err = copied;
+
+done:
+	skb_free_datagram(sk, skb);
+out:
+	pr_debug("ping_recvmsg -> %d\n", err);
+	return err;
+}
+
+static int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+	pr_debug("ping_queue_rcv_skb(sk=%p,sk->num=%d,skb=%p)\n",
+		inet_sk(sk), inet_sk(sk)->inet_num, skb);
+	if (sock_queue_rcv_skb(sk, skb) < 0) {
+		ICMP_INC_STATS_BH(sock_net(sk), ICMP_MIB_INERRORS);
+		kfree_skb(skb);
+		pr_debug("ping_queue_rcv_skb -> failed\n");
+		return -1;
+	}
+	return 0;
+}
+
+
+/*
+ *	All we need to do is get the socket.
+ */
+
+void ping_rcv(struct sk_buff *skb)
+{
+	struct sock *sk;
+	struct net *net = dev_net(skb->dev);
+	struct iphdr *iph = ip_hdr(skb);
+	struct icmphdr *icmph = icmp_hdr(skb);
+	u32 saddr = iph->saddr;
+	u32 daddr = iph->daddr;
+
+	/* We assume the packet has already been checked by icmp_rcv */
+
+	pr_debug("ping_rcv(skb=%p,id=%04x,seq=%04x)\n",
+		skb, ntohs(icmph->un.echo.id), ntohs(icmph->un.echo.sequence));
+
+	/* Push ICMP header back */
+	skb_push(skb, skb->data - (u8 *)icmph);
+
+	sk = ping_v4_lookup(net, saddr, daddr, ntohs(icmph->un.echo.id),
+			    skb->dev->ifindex);
+	if (sk != NULL) {
+		pr_debug("rcv on socket %p\n", sk);
+		ping_queue_rcv_skb(sk, skb_get(skb));
+		sock_put(sk);
+		return;
+	}
+	pr_debug("no socket, dropping\n");
+
+	/* We're called from icmp_rcv(). kfree_skb() is done there. */
+}
+
+struct proto ping_prot = {
+	.name =		"PING",
+	.owner =	THIS_MODULE,
+	.init =		ping_init_sock,
+	.close =	ping_close,
+	.connect =	ip4_datagram_connect,
+	.disconnect =	udp_disconnect,
+	.setsockopt =	ip_setsockopt,
+	.getsockopt =	ip_getsockopt,
+	.sendmsg =	ping_sendmsg,
+	.recvmsg =	ping_recvmsg,
+	.bind =		ping_bind,
+	.backlog_rcv =	ping_queue_rcv_skb,
+	.hash =		ping_v4_hash,
+	.unhash =	ping_v4_unhash,
+	.get_port =	ping_v4_get_port,
+	.obj_size =	sizeof(struct inet_sock),
+};
+EXPORT_SYMBOL(ping_prot);
+
+#ifdef CONFIG_PROC_FS
+
+static struct sock *ping_get_first(struct seq_file *seq, int start)
+{
+	struct sock *sk;
+	struct ping_iter_state *state = seq->private;
+	struct net *net = seq_file_net(seq);
+
+	for (state->bucket = start; state->bucket < PING_HTABLE_SIZE;
+	     ++state->bucket) {
+		struct hlist_nulls_node *node;
+		struct hlist_nulls_head *hslot;
+
+		hslot = &ping_table.hash[state->bucket];
+
+		if (hlist_nulls_empty(hslot))
+			continue;
+
+		sk_nulls_for_each(sk, node, hslot) {
+			if (net_eq(sock_net(sk), net))
+				goto found;
+		}
+	}
+	sk = NULL;
+found:
+	return sk;
+}
+
+static struct sock *ping_get_next(struct seq_file *seq, struct sock *sk)
+{
+	struct ping_iter_state *state = seq->private;
+	struct net *net = seq_file_net(seq);
+
+	do {
+		sk = sk_nulls_next(sk);
+	} while (sk && (!net_eq(sock_net(sk), net)));
+
+	if (!sk)
+		return ping_get_first(seq, state->bucket + 1);
+	return sk;
+}
+
+static struct sock *ping_get_idx(struct seq_file *seq, loff_t pos)
+{
+	struct sock *sk = ping_get_first(seq, 0);
+
+	if (sk)
+		while (pos && (sk = ping_get_next(seq, sk)) != NULL)
+			--pos;
+	return pos ? NULL : sk;
+}
+
+static void *ping_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	struct ping_iter_state *state = seq->private;
+	state->bucket = 0;
+
+	read_lock_bh(&ping_table.lock);
+
+	return *pos ? ping_get_idx(seq, *pos-1) : SEQ_START_TOKEN;
+}
+
+static void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct sock *sk;
+
+	if (v == SEQ_START_TOKEN)
+		sk = ping_get_idx(seq, 0);
+	else
+		sk = ping_get_next(seq, v);
+
+	++*pos;
+	return sk;
+}
+
+static void ping_seq_stop(struct seq_file *seq, void *v)
+{
+	read_unlock_bh(&ping_table.lock);
+}
+
+static void ping_format_sock(struct sock *sp, struct seq_file *f,
+		int bucket, int *len)
+{
+	struct inet_sock *inet = inet_sk(sp);
+	__be32 dest = inet->inet_daddr;
+	__be32 src = inet->inet_rcv_saddr;
+	__u16 destp = ntohs(inet->inet_dport);
+	__u16 srcp = ntohs(inet->inet_sport);
+
+	seq_printf(f, "%5d: %08X:%04X %08X:%04X"
+		" %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d%n",
+		bucket, src, srcp, dest, destp, sp->sk_state,
+		sk_wmem_alloc_get(sp),
+		sk_rmem_alloc_get(sp),
+		0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
+		atomic_read(&sp->sk_refcnt), sp,
+		atomic_read(&sp->sk_drops), len);
+}
+
+static int ping_seq_show(struct seq_file *seq, void *v)
+{
+	if (v == SEQ_START_TOKEN)
+		seq_printf(seq, "%-127s\n",
+			   "  sl  local_address rem_address   st tx_queue "
+			   "rx_queue tr tm->when retrnsmt   uid  timeout "
+			   "inode ref pointer drops");
+	else {
+		struct ping_iter_state *state = seq->private;
+		int len;
+
+		ping_format_sock(v, seq, state->bucket, &len);
+		seq_printf(seq, "%*s\n", 127 - len, "");
+	}
+	return 0;
+}
+
+static const struct seq_operations ping_seq_ops = {
+	.show		= ping_seq_show,
+	.start		= ping_seq_start,
+	.next		= ping_seq_next,
+	.stop		= ping_seq_stop,
+};
+
+static int ping_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open_net(inode, file, &ping_seq_ops,
+			   sizeof(struct ping_iter_state));
+}
+
+static const struct file_operations ping_seq_fops = {
+	.open		= ping_seq_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release_net,
+};
+
+static int ping_proc_register(struct net *net)
+{
+	struct proc_dir_entry *p;
+	int rc = 0;
+
+	p = proc_net_fops_create(net, "icmp", S_IRUGO, &ping_seq_fops);
+	if (!p)
+		rc = -ENOMEM;
+	return rc;
+}
+
+static void ping_proc_unregister(struct net *net)
+{
+	proc_net_remove(net, "icmp");
+}
+
+
+static int __net_init ping_proc_init_net(struct net *net)
+{
+	return ping_proc_register(net);
+}
+
+static void __net_exit ping_proc_exit_net(struct net *net)
+{
+	ping_proc_unregister(net);
+}
+
+static struct pernet_operations ping_net_ops = {
+	.init = ping_proc_init_net,
+	.exit = ping_proc_exit_net,
+};
+
+int __init ping_proc_init(void)
+{
+	return register_pernet_subsys(&ping_net_ops);
+}
+
+void ping_proc_exit(void)
+{
+	unregister_pernet_subsys(&ping_net_ops);
+}
+
+#endif
+
+void __init ping_init(void)
+{
+	int i;
+
+	for (i = 0; i < PING_HTABLE_SIZE; i++)
+		INIT_HLIST_NULLS_HEAD(&ping_table.hash[i], i);
+	rwlock_init(&ping_table.lock);
+}
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index bceaec4..11e17804 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -154,7 +154,7 @@ static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
  * RFC 1122: SHOULD pass TOS value up to the transport layer.
  * -> It does. And not only TOS, but all IP header.
  */
-static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
+static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
 {
 	struct sock *sk;
 	struct hlist_head *head;
@@ -247,7 +247,7 @@ static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info)
 	}
 
 	if (inet->recverr) {
-		struct iphdr *iph = (struct iphdr *)skb->data;
+		const struct iphdr *iph = (const struct iphdr *)skb->data;
 		u8 *payload = skb->data + (iph->ihl << 2);
 
 		if (inet->hdrincl)
@@ -265,7 +265,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
 {
 	int hash;
 	struct sock *raw_sk;
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	struct net *net;
 
 	hash = protocol & (RAW_HTABLE_SIZE - 1);
@@ -273,7 +273,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
 	read_lock(&raw_v4_hashinfo.lock);
 	raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
 	if (raw_sk != NULL) {
-		iph = (struct iphdr *)skb->data;
+		iph = (const struct iphdr *)skb->data;
 		net = dev_net(skb->dev);
 
 		while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
@@ -281,7 +281,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
 						skb->dev->ifindex)) != NULL) {
 			raw_err(raw_sk, skb, info);
 			raw_sk = sk_next(raw_sk);
-			iph = (struct iphdr *)skb->data;
+			iph = (const struct iphdr *)skb->data;
 		}
 	}
 	read_unlock(&raw_v4_hashinfo.lock);
@@ -314,9 +314,10 @@ int raw_rcv(struct sock *sk, struct sk_buff *skb)
 	return 0;
 }
 
-static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
-			struct rtable **rtp,
-			unsigned int flags)
+static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
+			   void *from, size_t length,
+			   struct rtable **rtp,
+			   unsigned int flags)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct net *net = sock_net(sk);
@@ -327,7 +328,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
 	struct rtable *rt = *rtp;
 
 	if (length > rt->dst.dev->mtu) {
-		ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->inet_dport,
+		ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
 			       rt->dst.dev->mtu);
 		return -EMSGSIZE;
 	}
@@ -372,7 +373,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
 
 	if (iphlen >= sizeof(*iph)) {
 		if (!iph->saddr)
-			iph->saddr = rt->rt_src;
+			iph->saddr = fl4->saddr;
 		iph->check   = 0;
 		iph->tot_len = htons(length);
 		if (!iph->id)
@@ -455,11 +456,13 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	struct inet_sock *inet = inet_sk(sk);
 	struct ipcm_cookie ipc;
 	struct rtable *rt = NULL;
+	struct flowi4 fl4;
 	int free = 0;
 	__be32 daddr;
 	__be32 saddr;
 	u8  tos;
 	int err;
+	struct ip_options_data opt_copy;
 
 	err = -EMSGSIZE;
 	if (len > 0xFFFF)
@@ -520,8 +523,18 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	saddr = ipc.addr;
 	ipc.addr = daddr;
 
-	if (!ipc.opt)
-		ipc.opt = inet->opt;
+	if (!ipc.opt) {
+		struct ip_options_rcu *inet_opt;
+
+		rcu_read_lock();
+		inet_opt = rcu_dereference(inet->inet_opt);
+		if (inet_opt) {
+			memcpy(&opt_copy, inet_opt,
+			       sizeof(*inet_opt) + inet_opt->opt.optlen);
+			ipc.opt = &opt_copy.opt;
+		}
+		rcu_read_unlock();
+	}
 
 	if (ipc.opt) {
 		err = -EINVAL;
@@ -530,10 +543,10 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		 */
 		if (inet->hdrincl)
 			goto done;
-		if (ipc.opt->srr) {
+		if (ipc.opt->opt.srr) {
 			if (!daddr)
 				goto done;
-			daddr = ipc.opt->faddr;
+			daddr = ipc.opt->opt.faddr;
 		}
 	}
 	tos = RT_CONN_FLAGS(sk);
@@ -547,31 +560,23 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 			saddr = inet->mc_addr;
 	}
 
-	{
-		struct flowi4 fl4 = {
-			.flowi4_oif = ipc.oif,
-			.flowi4_mark = sk->sk_mark,
-			.daddr = daddr,
-			.saddr = saddr,
-			.flowi4_tos = tos,
-			.flowi4_proto = (inet->hdrincl ?
-					 IPPROTO_RAW :
-					 sk->sk_protocol),
-			.flowi4_flags = FLOWI_FLAG_CAN_SLEEP,
-		};
-		if (!inet->hdrincl) {
-			err = raw_probe_proto_opt(&fl4, msg);
-			if (err)
-				goto done;
-		}
+	flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
+			   RT_SCOPE_UNIVERSE,
+			   inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
+			   FLOWI_FLAG_CAN_SLEEP, daddr, saddr, 0, 0);
 
-		security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
-		rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
-		if (IS_ERR(rt)) {
-			err = PTR_ERR(rt);
-			rt = NULL;
+	if (!inet->hdrincl) {
+		err = raw_probe_proto_opt(&fl4, msg);
+		if (err)
 			goto done;
-		}
+	}
+
+	security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
+	rt = ip_route_output_flow(sock_net(sk), &fl4, sk);
+	if (IS_ERR(rt)) {
+		err = PTR_ERR(rt);
+		rt = NULL;
+		goto done;
 	}
 
 	err = -EACCES;
@@ -583,19 +588,20 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 back_from_confirm:
 
 	if (inet->hdrincl)
-		err = raw_send_hdrinc(sk, msg->msg_iov, len,
-					&rt, msg->msg_flags);
+		err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len,
+				      &rt, msg->msg_flags);
 
 	 else {
 		if (!ipc.addr)
-			ipc.addr = rt->rt_dst;
+			ipc.addr = fl4.daddr;
 		lock_sock(sk);
-		err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0,
-					&ipc, &rt, msg->msg_flags);
+		err = ip_append_data(sk, &fl4, ip_generic_getfrag,
+				     msg->msg_iov, len, 0,
+				     &ipc, &rt, msg->msg_flags);
 		if (err)
 			ip_flush_pending_frames(sk);
 		else if (!(msg->msg_flags & MSG_MORE)) {
-			err = ip_push_pending_frames(sk);
+			err = ip_push_pending_frames(sk, &fl4);
 			if (err == -ENOBUFS && !inet->recverr)
 				err = 0;
 		}
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 99e6e4b..b24d58e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -156,7 +156,7 @@ static u32 *ipv4_cow_metrics(struct dst_entry *dst, unsigned long old)
 	u32 *p = NULL;
 
 	if (!rt->peer)
-		rt_bind_peer(rt, 1);
+		rt_bind_peer(rt, rt->rt_dst, 1);
 
 	peer = rt->peer;
 	if (peer) {
@@ -424,7 +424,7 @@ static int rt_cache_seq_show(struct seq_file *seq, void *v)
 			dst_metric(&r->dst, RTAX_WINDOW),
 			(int)((dst_metric(&r->dst, RTAX_RTT) >> 3) +
 			      dst_metric(&r->dst, RTAX_RTTVAR)),
-			r->rt_tos,
+			r->rt_key_tos,
 			r->dst.hh ? atomic_read(&r->dst.hh->hh_refcnt) : -1,
 			r->dst.hh ? (r->dst.hh->hh_output ==
 				       dev_queue_xmit) : 0,
@@ -724,7 +724,7 @@ static inline int compare_keys(struct rtable *rt1, struct rtable *rt2)
 	return (((__force u32)rt1->rt_key_dst ^ (__force u32)rt2->rt_key_dst) |
 		((__force u32)rt1->rt_key_src ^ (__force u32)rt2->rt_key_src) |
 		(rt1->rt_mark ^ rt2->rt_mark) |
-		(rt1->rt_tos ^ rt2->rt_tos) |
+		(rt1->rt_key_tos ^ rt2->rt_key_tos) |
 		(rt1->rt_oif ^ rt2->rt_oif) |
 		(rt1->rt_iif ^ rt2->rt_iif)) == 0;
 }
@@ -968,10 +968,6 @@ static int rt_garbage_collect(struct dst_ops *ops)
 			break;
 
 		expire >>= 1;
-#if RT_CACHE_DEBUG >= 2
-		printk(KERN_DEBUG "expire>> %u %d %d %d\n", expire,
-				dst_entries_get_fast(&ipv4_dst_ops), goal, i);
-#endif
 
 		if (dst_entries_get_fast(&ipv4_dst_ops) < ip_rt_max_size)
 			goto out;
@@ -992,10 +988,6 @@ work_done:
 	    dst_entries_get_fast(&ipv4_dst_ops) < ipv4_dst_ops.gc_thresh ||
 	    dst_entries_get_slow(&ipv4_dst_ops) < ipv4_dst_ops.gc_thresh)
 		expire = ip_rt_gc_timeout;
-#if RT_CACHE_DEBUG >= 2
-	printk(KERN_DEBUG "expire++ %u %d %d %d\n", expire,
-			dst_entries_get_fast(&ipv4_dst_ops), goal, rover);
-#endif
 out:	return 0;
 }
 
@@ -1179,16 +1171,6 @@ restart:
 
 	rt->dst.rt_next = rt_hash_table[hash].chain;
 
-#if RT_CACHE_DEBUG >= 2
-	if (rt->dst.rt_next) {
-		struct rtable *trt;
-		printk(KERN_DEBUG "rt_cache @%02x: %pI4",
-		       hash, &rt->rt_dst);
-		for (trt = rt->dst.rt_next; trt; trt = trt->dst.rt_next)
-			printk(" . %pI4", &trt->rt_dst);
-		printk("\n");
-	}
-#endif
 	/*
 	 * Since lookup is lockfree, we must make sure
 	 * previous writes to rt are committed to memory
@@ -1211,11 +1193,11 @@ static u32 rt_peer_genid(void)
 	return atomic_read(&__rt_peer_genid);
 }
 
-void rt_bind_peer(struct rtable *rt, int create)
+void rt_bind_peer(struct rtable *rt, __be32 daddr, int create)
 {
 	struct inet_peer *peer;
 
-	peer = inet_getpeer_v4(rt->rt_dst, create);
+	peer = inet_getpeer_v4(daddr, create);
 
 	if (peer && cmpxchg(&rt->peer, NULL, peer) != NULL)
 		inet_putpeer(peer);
@@ -1249,7 +1231,7 @@ void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more)
 
 	if (rt) {
 		if (rt->peer == NULL)
-			rt_bind_peer(rt, 1);
+			rt_bind_peer(rt, rt->rt_dst, 1);
 
 		/* If peer is attached to destination, it is never detached,
 		   so that we need not to grab a lock to dereference it.
@@ -1347,10 +1329,6 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
 			unsigned hash = rt_hash(rt->rt_key_dst, rt->rt_key_src,
 						rt->rt_oif,
 						rt_genid(dev_net(dst->dev)));
-#if RT_CACHE_DEBUG >= 1
-			printk(KERN_DEBUG "ipv4_negative_advice: redirect to %pI4/%02x dropped\n",
-				&rt->rt_dst, rt->rt_tos);
-#endif
 			rt_del(hash, rt);
 			ret = NULL;
 		} else if (rt->peer &&
@@ -1399,7 +1377,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
 	rcu_read_unlock();
 
 	if (!rt->peer)
-		rt_bind_peer(rt, 1);
+		rt_bind_peer(rt, rt->rt_dst, 1);
 	peer = rt->peer;
 	if (!peer) {
 		icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, rt->rt_gateway);
@@ -1435,7 +1413,7 @@ void ip_rt_send_redirect(struct sk_buff *skb)
 		    peer->rate_tokens == ip_rt_redirect_number &&
 		    net_ratelimit())
 			printk(KERN_WARNING "host %pI4/if%d ignores redirects for %pI4 to %pI4.\n",
-				&rt->rt_src, rt->rt_iif,
+			       &ip_hdr(skb)->saddr, rt->rt_iif,
 				&rt->rt_dst, &rt->rt_gateway);
 #endif
 	}
@@ -1467,7 +1445,7 @@ static int ip_error(struct sk_buff *skb)
 	}
 
 	if (!rt->peer)
-		rt_bind_peer(rt, 1);
+		rt_bind_peer(rt, rt->rt_dst, 1);
 	peer = rt->peer;
 
 	send = true;
@@ -1507,7 +1485,7 @@ static inline unsigned short guess_mtu(unsigned short old_mtu)
 	return 68;
 }
 
-unsigned short ip_rt_frag_needed(struct net *net, struct iphdr *iph,
+unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph,
 				 unsigned short new_mtu,
 				 struct net_device *dev)
 {
@@ -1574,7 +1552,7 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
 	dst_confirm(dst);
 
 	if (!rt->peer)
-		rt_bind_peer(rt, 1);
+		rt_bind_peer(rt, rt->rt_dst, 1);
 	peer = rt->peer;
 	if (peer) {
 		if (mtu < ip_rt_min_pmtu)
@@ -1631,7 +1609,7 @@ static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie)
 		struct inet_peer *peer;
 
 		if (!rt->peer)
-			rt_bind_peer(rt, 0);
+			rt_bind_peer(rt, rt->rt_dst, 0);
 
 		peer = rt->peer;
 		if (peer && peer->pmtu_expires)
@@ -1699,22 +1677,26 @@ static int ip_rt_bug(struct sk_buff *skb)
    in IP options!
  */
 
-void ip_rt_get_source(u8 *addr, struct rtable *rt)
+void ip_rt_get_source(u8 *addr, struct sk_buff *skb, struct rtable *rt)
 {
 	__be32 src;
-	struct fib_result res;
 
 	if (rt_is_output_route(rt))
-		src = rt->rt_src;
+		src = ip_hdr(skb)->saddr;
 	else {
-		struct flowi4 fl4 = {
-			.daddr = rt->rt_key_dst,
-			.saddr = rt->rt_key_src,
-			.flowi4_tos = rt->rt_tos,
-			.flowi4_oif = rt->rt_oif,
-			.flowi4_iif = rt->rt_iif,
-			.flowi4_mark = rt->rt_mark,
-		};
+		struct fib_result res;
+		struct flowi4 fl4;
+		struct iphdr *iph;
+
+		iph = ip_hdr(skb);
+
+		memset(&fl4, 0, sizeof(fl4));
+		fl4.daddr = iph->daddr;
+		fl4.saddr = iph->saddr;
+		fl4.flowi4_tos = iph->tos;
+		fl4.flowi4_oif = rt->dst.dev->ifindex;
+		fl4.flowi4_iif = skb->dev->ifindex;
+		fl4.flowi4_mark = skb->mark;
 
 		rcu_read_lock();
 		if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res) == 0)
@@ -1767,7 +1749,7 @@ static unsigned int ipv4_default_mtu(const struct dst_entry *dst)
 	return mtu;
 }
 
-static void rt_init_metrics(struct rtable *rt, const struct flowi4 *oldflp4,
+static void rt_init_metrics(struct rtable *rt, const struct flowi4 *fl4,
 			    struct fib_info *fi)
 {
 	struct inet_peer *peer;
@@ -1776,7 +1758,7 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *oldflp4,
 	/* If a peer entry exists for this destination, we must hook
 	 * it up in order to get at cached metrics.
 	 */
-	if (oldflp4 && (oldflp4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
+	if (fl4 && (fl4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
 		create = 1;
 
 	rt->peer = peer = inet_getpeer_v4(rt->rt_dst, create);
@@ -1803,7 +1785,7 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *oldflp4,
 	}
 }
 
-static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
+static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *fl4,
 			   const struct fib_result *res,
 			   struct fib_info *fi, u16 type, u32 itag)
 {
@@ -1813,7 +1795,7 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
 		if (FIB_RES_GW(*res) &&
 		    FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
 			rt->rt_gateway = FIB_RES_GW(*res);
-		rt_init_metrics(rt, oldflp4, fi);
+		rt_init_metrics(rt, fl4, fi);
 #ifdef CONFIG_IP_ROUTE_CLASSID
 		dst->tclassid = FIB_RES_NH(*res).nh_tclassid;
 #endif
@@ -1830,20 +1812,15 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *oldflp4,
 #endif
 	set_class_tag(rt, itag);
 #endif
-	rt->rt_type = type;
 }
 
-static struct rtable *rt_dst_alloc(bool nopolicy, bool noxfrm)
+static struct rtable *rt_dst_alloc(struct net_device *dev,
+				   bool nopolicy, bool noxfrm)
 {
-	struct rtable *rt = dst_alloc(&ipv4_dst_ops, 1);
-	if (rt) {
-		rt->dst.obsolete = -1;
-
-		rt->dst.flags = DST_HOST |
-			(nopolicy ? DST_NOPOLICY : 0) |
-			(noxfrm ? DST_NOXFRM : 0);
-	}
-	return rt;
+	return dst_alloc(&ipv4_dst_ops, dev, 1, -1,
+			 DST_HOST |
+			 (nopolicy ? DST_NOPOLICY : 0) |
+			 (noxfrm ? DST_NOXFRM : 0));
 }
 
 /* called in rcu_read_lock() section */
@@ -1871,36 +1848,38 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 			goto e_inval;
 		spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
 	} else {
-		err = fib_validate_source(saddr, 0, tos, 0, dev, &spec_dst,
-					  &itag, 0);
+		err = fib_validate_source(skb, saddr, 0, tos, 0, dev, &spec_dst,
+					  &itag);
 		if (err < 0)
 			goto e_err;
 	}
-	rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
+	rth = rt_dst_alloc(init_net.loopback_dev,
+			   IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
 	if (!rth)
 		goto e_nobufs;
 
+#ifdef CONFIG_IP_ROUTE_CLASSID
+	rth->dst.tclassid = itag;
+#endif
 	rth->dst.output = ip_rt_bug;
 
 	rth->rt_key_dst	= daddr;
-	rth->rt_dst	= daddr;
-	rth->rt_tos	= tos;
-	rth->rt_mark    = skb->mark;
 	rth->rt_key_src	= saddr;
+	rth->rt_genid	= rt_genid(dev_net(dev));
+	rth->rt_flags	= RTCF_MULTICAST;
+	rth->rt_type	= RTN_MULTICAST;
+	rth->rt_key_tos	= tos;
+	rth->rt_dst	= daddr;
 	rth->rt_src	= saddr;
-#ifdef CONFIG_IP_ROUTE_CLASSID
-	rth->dst.tclassid = itag;
-#endif
 	rth->rt_route_iif = dev->ifindex;
 	rth->rt_iif	= dev->ifindex;
-	rth->dst.dev	= init_net.loopback_dev;
-	dev_hold(rth->dst.dev);
 	rth->rt_oif	= 0;
+	rth->rt_mark    = skb->mark;
 	rth->rt_gateway	= daddr;
 	rth->rt_spec_dst= spec_dst;
-	rth->rt_genid	= rt_genid(dev_net(dev));
-	rth->rt_flags	= RTCF_MULTICAST;
-	rth->rt_type	= RTN_MULTICAST;
+	rth->rt_peer_genid = 0;
+	rth->peer = NULL;
+	rth->fi = NULL;
 	if (our) {
 		rth->dst.input= ip_local_deliver;
 		rth->rt_flags |= RTCF_LOCAL;
@@ -1981,8 +1960,8 @@ static int __mkroute_input(struct sk_buff *skb,
 	}
 
 
-	err = fib_validate_source(saddr, daddr, tos, FIB_RES_OIF(*res),
-				  in_dev->dev, &spec_dst, &itag, skb->mark);
+	err = fib_validate_source(skb, saddr, daddr, tos, FIB_RES_OIF(*res),
+				  in_dev->dev, &spec_dst, &itag);
 	if (err < 0) {
 		ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr,
 					 saddr);
@@ -2013,7 +1992,8 @@ static int __mkroute_input(struct sk_buff *skb,
 		}
 	}
 
-	rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY),
+	rth = rt_dst_alloc(out_dev->dev,
+			   IN_DEV_CONF_GET(in_dev, NOPOLICY),
 			   IN_DEV_CONF_GET(out_dev, NOXFRM));
 	if (!rth) {
 		err = -ENOBUFS;
@@ -2021,27 +2001,28 @@ static int __mkroute_input(struct sk_buff *skb,
 	}
 
 	rth->rt_key_dst	= daddr;
-	rth->rt_dst	= daddr;
-	rth->rt_tos	= tos;
-	rth->rt_mark    = skb->mark;
 	rth->rt_key_src	= saddr;
+	rth->rt_genid = rt_genid(dev_net(rth->dst.dev));
+	rth->rt_flags = flags;
+	rth->rt_type = res->type;
+	rth->rt_key_tos	= tos;
+	rth->rt_dst	= daddr;
 	rth->rt_src	= saddr;
-	rth->rt_gateway	= daddr;
 	rth->rt_route_iif = in_dev->dev->ifindex;
 	rth->rt_iif 	= in_dev->dev->ifindex;
-	rth->dst.dev	= (out_dev)->dev;
-	dev_hold(rth->dst.dev);
 	rth->rt_oif 	= 0;
+	rth->rt_mark    = skb->mark;
+	rth->rt_gateway	= daddr;
 	rth->rt_spec_dst= spec_dst;
+	rth->rt_peer_genid = 0;
+	rth->peer = NULL;
+	rth->fi = NULL;
 
 	rth->dst.input = ip_forward;
 	rth->dst.output = ip_output;
-	rth->rt_genid = rt_genid(dev_net(rth->dst.dev));
 
 	rt_set_nexthop(rth, NULL, res, res->fi, res->type, itag);
 
-	rth->rt_flags = flags;
-
 	*result = rth;
 	err = 0;
  cleanup:
@@ -2150,9 +2131,9 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 		goto brd_input;
 
 	if (res.type == RTN_LOCAL) {
-		err = fib_validate_source(saddr, daddr, tos,
+		err = fib_validate_source(skb, saddr, daddr, tos,
 					  net->loopback_dev->ifindex,
-					  dev, &spec_dst, &itag, skb->mark);
+					  dev, &spec_dst, &itag);
 		if (err < 0)
 			goto martian_source_keep_err;
 		if (err)
@@ -2176,8 +2157,8 @@ brd_input:
 	if (ipv4_is_zeronet(saddr))
 		spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
 	else {
-		err = fib_validate_source(saddr, 0, tos, 0, dev, &spec_dst,
-					  &itag, skb->mark);
+		err = fib_validate_source(skb, saddr, 0, tos, 0, dev, &spec_dst,
+					  &itag);
 		if (err < 0)
 			goto martian_source_keep_err;
 		if (err)
@@ -2188,36 +2169,42 @@ brd_input:
 	RT_CACHE_STAT_INC(in_brd);
 
 local_input:
-	rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
+	rth = rt_dst_alloc(net->loopback_dev,
+			   IN_DEV_CONF_GET(in_dev, NOPOLICY), false);
 	if (!rth)
 		goto e_nobufs;
 
+	rth->dst.input= ip_local_deliver;
 	rth->dst.output= ip_rt_bug;
-	rth->rt_genid = rt_genid(net);
+#ifdef CONFIG_IP_ROUTE_CLASSID
+	rth->dst.tclassid = itag;
+#endif
 
 	rth->rt_key_dst	= daddr;
-	rth->rt_dst	= daddr;
-	rth->rt_tos	= tos;
-	rth->rt_mark    = skb->mark;
 	rth->rt_key_src	= saddr;
+	rth->rt_genid = rt_genid(net);
+	rth->rt_flags 	= flags|RTCF_LOCAL;
+	rth->rt_type	= res.type;
+	rth->rt_key_tos	= tos;
+	rth->rt_dst	= daddr;
 	rth->rt_src	= saddr;
 #ifdef CONFIG_IP_ROUTE_CLASSID
 	rth->dst.tclassid = itag;
 #endif
 	rth->rt_route_iif = dev->ifindex;
 	rth->rt_iif	= dev->ifindex;
-	rth->dst.dev	= net->loopback_dev;
-	dev_hold(rth->dst.dev);
+	rth->rt_oif	= 0;
+	rth->rt_mark    = skb->mark;
 	rth->rt_gateway	= daddr;
 	rth->rt_spec_dst= spec_dst;
-	rth->dst.input= ip_local_deliver;
-	rth->rt_flags 	= flags|RTCF_LOCAL;
+	rth->rt_peer_genid = 0;
+	rth->peer = NULL;
+	rth->fi = NULL;
 	if (res.type == RTN_UNREACHABLE) {
 		rth->dst.input= ip_error;
 		rth->dst.error= -err;
 		rth->rt_flags 	&= ~RTCF_LOCAL;
 	}
-	rth->rt_type	= res.type;
 	hash = rt_hash(daddr, saddr, fl4.flowi4_iif, rt_genid(net));
 	rth = rt_intern_hash(hash, rth, skb, fl4.flowi4_iif);
 	err = 0;
@@ -2288,7 +2275,7 @@ int ip_route_input_common(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 		     ((__force u32)rth->rt_key_src ^ (__force u32)saddr) |
 		     (rth->rt_iif ^ iif) |
 		     rth->rt_oif |
-		     (rth->rt_tos ^ tos)) == 0 &&
+		     (rth->rt_key_tos ^ tos)) == 0 &&
 		    rth->rt_mark == skb->mark &&
 		    net_eq(dev_net(rth->dst.dev), net) &&
 		    !rt_is_expired(rth)) {
@@ -2349,12 +2336,12 @@ EXPORT_SYMBOL(ip_route_input_common);
 /* called with rcu_read_lock() */
 static struct rtable *__mkroute_output(const struct fib_result *res,
 				       const struct flowi4 *fl4,
-				       const struct flowi4 *oldflp4,
-				       struct net_device *dev_out,
+				       __be32 orig_daddr, __be32 orig_saddr,
+				       int orig_oif, struct net_device *dev_out,
 				       unsigned int flags)
 {
 	struct fib_info *fi = res->fi;
-	u32 tos = RT_FL_TOS(oldflp4);
+	u32 tos = RT_FL_TOS(fl4);
 	struct in_device *in_dev;
 	u16 type = res->type;
 	struct rtable *rth;
@@ -2381,8 +2368,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
 		fi = NULL;
 	} else if (type == RTN_MULTICAST) {
 		flags |= RTCF_MULTICAST | RTCF_LOCAL;
-		if (!ip_check_mc_rcu(in_dev, oldflp4->daddr, oldflp4->saddr,
-				     oldflp4->flowi4_proto))
+		if (!ip_check_mc_rcu(in_dev, fl4->daddr, fl4->saddr,
+				     fl4->flowi4_proto))
 			flags &= ~RTCF_LOCAL;
 		/* If multicast route do not exist use
 		 * default one, but do not gateway in this case.
@@ -2392,29 +2379,31 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
 			fi = NULL;
 	}
 
-	rth = rt_dst_alloc(IN_DEV_CONF_GET(in_dev, NOPOLICY),
+	rth = rt_dst_alloc(dev_out,
+			   IN_DEV_CONF_GET(in_dev, NOPOLICY),
 			   IN_DEV_CONF_GET(in_dev, NOXFRM));
 	if (!rth)
 		return ERR_PTR(-ENOBUFS);
 
-	rth->rt_key_dst	= oldflp4->daddr;
-	rth->rt_tos	= tos;
-	rth->rt_key_src	= oldflp4->saddr;
-	rth->rt_oif	= oldflp4->flowi4_oif;
-	rth->rt_mark    = oldflp4->flowi4_mark;
+	rth->dst.output = ip_output;
+
+	rth->rt_key_dst	= orig_daddr;
+	rth->rt_key_src	= orig_saddr;
+	rth->rt_genid = rt_genid(dev_net(dev_out));
+	rth->rt_flags	= flags;
+	rth->rt_type	= type;
+	rth->rt_key_tos	= tos;
 	rth->rt_dst	= fl4->daddr;
 	rth->rt_src	= fl4->saddr;
 	rth->rt_route_iif = 0;
-	rth->rt_iif	= oldflp4->flowi4_oif ? : dev_out->ifindex;
-	/* get references to the devices that are to be hold by the routing
-	   cache entry */
-	rth->dst.dev	= dev_out;
-	dev_hold(dev_out);
+	rth->rt_iif	= orig_oif ? : dev_out->ifindex;
+	rth->rt_oif	= orig_oif;
+	rth->rt_mark    = fl4->flowi4_mark;
 	rth->rt_gateway = fl4->daddr;
 	rth->rt_spec_dst= fl4->saddr;
-
-	rth->dst.output=ip_output;
-	rth->rt_genid = rt_genid(dev_net(dev_out));
+	rth->rt_peer_genid = 0;
+	rth->peer = NULL;
+	rth->fi = NULL;
 
 	RT_CACHE_STAT_INC(out_slow_tot);
 
@@ -2432,7 +2421,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
 #ifdef CONFIG_IP_MROUTE
 		if (type == RTN_MULTICAST) {
 			if (IN_DEV_MFORWARD(in_dev) &&
-			    !ipv4_is_local_multicast(oldflp4->daddr)) {
+			    !ipv4_is_local_multicast(fl4->daddr)) {
 				rth->dst.input = ip_mr_input;
 				rth->dst.output = ip_mc_output;
 			}
@@ -2440,9 +2429,8 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
 #endif
 	}
 
-	rt_set_nexthop(rth, oldflp4, res, fi, type, 0);
+	rt_set_nexthop(rth, fl4, res, fi, type, 0);
 
-	rth->rt_flags = flags;
 	return rth;
 }
 
@@ -2451,36 +2439,37 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
  * called with rcu_read_lock();
  */
 
-static struct rtable *ip_route_output_slow(struct net *net,
-					   const struct flowi4 *oldflp4)
+static struct rtable *ip_route_output_slow(struct net *net, struct flowi4 *fl4)
 {
-	u32 tos	= RT_FL_TOS(oldflp4);
-	struct flowi4 fl4;
-	struct fib_result res;
-	unsigned int flags = 0;
 	struct net_device *dev_out = NULL;
+	u32 tos	= RT_FL_TOS(fl4);
+	unsigned int flags = 0;
+	struct fib_result res;
 	struct rtable *rth;
+	__be32 orig_daddr;
+	__be32 orig_saddr;
+	int orig_oif;
 
 	res.fi		= NULL;
 #ifdef CONFIG_IP_MULTIPLE_TABLES
 	res.r		= NULL;
 #endif
 
-	fl4.flowi4_oif = oldflp4->flowi4_oif;
-	fl4.flowi4_iif = net->loopback_dev->ifindex;
-	fl4.flowi4_mark = oldflp4->flowi4_mark;
-	fl4.daddr = oldflp4->daddr;
-	fl4.saddr = oldflp4->saddr;
-	fl4.flowi4_tos = tos & IPTOS_RT_MASK;
-	fl4.flowi4_scope = ((tos & RTO_ONLINK) ?
-			RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
+	orig_daddr = fl4->daddr;
+	orig_saddr = fl4->saddr;
+	orig_oif = fl4->flowi4_oif;
+
+	fl4->flowi4_iif = net->loopback_dev->ifindex;
+	fl4->flowi4_tos = tos & IPTOS_RT_MASK;
+	fl4->flowi4_scope = ((tos & RTO_ONLINK) ?
+			 RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
 
 	rcu_read_lock();
-	if (oldflp4->saddr) {
+	if (fl4->saddr) {
 		rth = ERR_PTR(-EINVAL);
-		if (ipv4_is_multicast(oldflp4->saddr) ||
-		    ipv4_is_lbcast(oldflp4->saddr) ||
-		    ipv4_is_zeronet(oldflp4->saddr))
+		if (ipv4_is_multicast(fl4->saddr) ||
+		    ipv4_is_lbcast(fl4->saddr) ||
+		    ipv4_is_zeronet(fl4->saddr))
 			goto out;
 
 		/* I removed check for oif == dev_out->oif here.
@@ -2491,11 +2480,11 @@ static struct rtable *ip_route_output_slow(struct net *net,
 		      of another iface. --ANK
 		 */
 
-		if (oldflp4->flowi4_oif == 0 &&
-		    (ipv4_is_multicast(oldflp4->daddr) ||
-		     ipv4_is_lbcast(oldflp4->daddr))) {
+		if (fl4->flowi4_oif == 0 &&
+		    (ipv4_is_multicast(fl4->daddr) ||
+		     ipv4_is_lbcast(fl4->daddr))) {
 			/* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
-			dev_out = __ip_dev_find(net, oldflp4->saddr, false);
+			dev_out = __ip_dev_find(net, fl4->saddr, false);
 			if (dev_out == NULL)
 				goto out;
 
@@ -2514,20 +2503,20 @@ static struct rtable *ip_route_output_slow(struct net *net,
 			   Luckily, this hack is good workaround.
 			 */
 
-			fl4.flowi4_oif = dev_out->ifindex;
+			fl4->flowi4_oif = dev_out->ifindex;
 			goto make_route;
 		}
 
-		if (!(oldflp4->flowi4_flags & FLOWI_FLAG_ANYSRC)) {
+		if (!(fl4->flowi4_flags & FLOWI_FLAG_ANYSRC)) {
 			/* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
-			if (!__ip_dev_find(net, oldflp4->saddr, false))
+			if (!__ip_dev_find(net, fl4->saddr, false))
 				goto out;
 		}
 	}
 
 
-	if (oldflp4->flowi4_oif) {
-		dev_out = dev_get_by_index_rcu(net, oldflp4->flowi4_oif);
+	if (fl4->flowi4_oif) {
+		dev_out = dev_get_by_index_rcu(net, fl4->flowi4_oif);
 		rth = ERR_PTR(-ENODEV);
 		if (dev_out == NULL)
 			goto out;
@@ -2537,37 +2526,37 @@ static struct rtable *ip_route_output_slow(struct net *net,
 			rth = ERR_PTR(-ENETUNREACH);
 			goto out;
 		}
-		if (ipv4_is_local_multicast(oldflp4->daddr) ||
-		    ipv4_is_lbcast(oldflp4->daddr)) {
-			if (!fl4.saddr)
-				fl4.saddr = inet_select_addr(dev_out, 0,
-							     RT_SCOPE_LINK);
+		if (ipv4_is_local_multicast(fl4->daddr) ||
+		    ipv4_is_lbcast(fl4->daddr)) {
+			if (!fl4->saddr)
+				fl4->saddr = inet_select_addr(dev_out, 0,
+							      RT_SCOPE_LINK);
 			goto make_route;
 		}
-		if (!fl4.saddr) {
-			if (ipv4_is_multicast(oldflp4->daddr))
-				fl4.saddr = inet_select_addr(dev_out, 0,
-							     fl4.flowi4_scope);
-			else if (!oldflp4->daddr)
-				fl4.saddr = inet_select_addr(dev_out, 0,
-							     RT_SCOPE_HOST);
+		if (fl4->saddr) {
+			if (ipv4_is_multicast(fl4->daddr))
+				fl4->saddr = inet_select_addr(dev_out, 0,
+							      fl4->flowi4_scope);
+			else if (!fl4->daddr)
+				fl4->saddr = inet_select_addr(dev_out, 0,
+							      RT_SCOPE_HOST);
 		}
 	}
 
-	if (!fl4.daddr) {
-		fl4.daddr = fl4.saddr;
-		if (!fl4.daddr)
-			fl4.daddr = fl4.saddr = htonl(INADDR_LOOPBACK);
+	if (!fl4->daddr) {
+		fl4->daddr = fl4->saddr;
+		if (!fl4->daddr)
+			fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK);
 		dev_out = net->loopback_dev;
-		fl4.flowi4_oif = net->loopback_dev->ifindex;
+		fl4->flowi4_oif = net->loopback_dev->ifindex;
 		res.type = RTN_LOCAL;
 		flags |= RTCF_LOCAL;
 		goto make_route;
 	}
 
-	if (fib_lookup(net, &fl4, &res)) {
+	if (fib_lookup(net, fl4, &res)) {
 		res.fi = NULL;
-		if (oldflp4->flowi4_oif) {
+		if (fl4->flowi4_oif) {
 			/* Apparently, routing tables are wrong. Assume,
 			   that the destination is on link.
 
@@ -2586,9 +2575,9 @@ static struct rtable *ip_route_output_slow(struct net *net,
 			   likely IPv6, but we do not.
 			 */
 
-			if (fl4.saddr == 0)
-				fl4.saddr = inet_select_addr(dev_out, 0,
-							     RT_SCOPE_LINK);
+			if (fl4->saddr == 0)
+				fl4->saddr = inet_select_addr(dev_out, 0,
+							      RT_SCOPE_LINK);
 			res.type = RTN_UNICAST;
 			goto make_route;
 		}
@@ -2597,42 +2586,45 @@ static struct rtable *ip_route_output_slow(struct net *net,
 	}
 
 	if (res.type == RTN_LOCAL) {
-		if (!fl4.saddr) {
+		if (!fl4->saddr) {
 			if (res.fi->fib_prefsrc)
-				fl4.saddr = res.fi->fib_prefsrc;
+				fl4->saddr = res.fi->fib_prefsrc;
 			else
-				fl4.saddr = fl4.daddr;
+				fl4->saddr = fl4->daddr;
 		}
 		dev_out = net->loopback_dev;
-		fl4.flowi4_oif = dev_out->ifindex;
+		fl4->flowi4_oif = dev_out->ifindex;
 		res.fi = NULL;
 		flags |= RTCF_LOCAL;
 		goto make_route;
 	}
 
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
-	if (res.fi->fib_nhs > 1 && fl4.flowi4_oif == 0)
+	if (res.fi->fib_nhs > 1 && fl4->flowi4_oif == 0)
 		fib_select_multipath(&res);
 	else
 #endif
-	if (!res.prefixlen && res.type == RTN_UNICAST && !fl4.flowi4_oif)
+	if (!res.prefixlen &&
+	    res.table->tb_num_default > 1 &&
+	    res.type == RTN_UNICAST && !fl4->flowi4_oif)
 		fib_select_default(&res);
 
-	if (!fl4.saddr)
-		fl4.saddr = FIB_RES_PREFSRC(net, res);
+	if (!fl4->saddr)
+		fl4->saddr = FIB_RES_PREFSRC(net, res);
 
 	dev_out = FIB_RES_DEV(res);
-	fl4.flowi4_oif = dev_out->ifindex;
+	fl4->flowi4_oif = dev_out->ifindex;
 
 
 make_route:
-	rth = __mkroute_output(&res, &fl4, oldflp4, dev_out, flags);
+	rth = __mkroute_output(&res, fl4, orig_daddr, orig_saddr, orig_oif,
+			       dev_out, flags);
 	if (!IS_ERR(rth)) {
 		unsigned int hash;
 
-		hash = rt_hash(oldflp4->daddr, oldflp4->saddr, oldflp4->flowi4_oif,
+		hash = rt_hash(orig_daddr, orig_saddr, orig_oif,
 			       rt_genid(dev_net(dev_out)));
-		rth = rt_intern_hash(hash, rth, NULL, oldflp4->flowi4_oif);
+		rth = rt_intern_hash(hash, rth, NULL, orig_oif);
 	}
 
 out:
@@ -2640,7 +2632,7 @@ out:
 	return rth;
 }
 
-struct rtable *__ip_route_output_key(struct net *net, const struct flowi4 *flp4)
+struct rtable *__ip_route_output_key(struct net *net, struct flowi4 *flp4)
 {
 	struct rtable *rth;
 	unsigned int hash;
@@ -2658,13 +2650,17 @@ struct rtable *__ip_route_output_key(struct net *net, const struct flowi4 *flp4)
 		    rt_is_output_route(rth) &&
 		    rth->rt_oif == flp4->flowi4_oif &&
 		    rth->rt_mark == flp4->flowi4_mark &&
-		    !((rth->rt_tos ^ flp4->flowi4_tos) &
+		    !((rth->rt_key_tos ^ flp4->flowi4_tos) &
 			    (IPTOS_RT_MASK | RTO_ONLINK)) &&
 		    net_eq(dev_net(rth->dst.dev), net) &&
 		    !rt_is_expired(rth)) {
 			dst_use(&rth->dst, jiffies);
 			RT_CACHE_STAT_INC(out_hit);
 			rcu_read_unlock_bh();
+			if (!flp4->saddr)
+				flp4->saddr = rth->rt_src;
+			if (!flp4->daddr)
+				flp4->daddr = rth->rt_dst;
 			return rth;
 		}
 		RT_CACHE_STAT_INC(out_hlist_search);
@@ -2709,7 +2705,7 @@ static struct dst_ops ipv4_dst_blackhole_ops = {
 
 struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig)
 {
-	struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, 1);
+	struct rtable *rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, 0, 0);
 	struct rtable *ort = (struct rtable *) dst_orig;
 
 	if (rt) {
@@ -2726,7 +2722,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
 
 		rt->rt_key_dst = ort->rt_key_dst;
 		rt->rt_key_src = ort->rt_key_src;
-		rt->rt_tos = ort->rt_tos;
+		rt->rt_key_tos = ort->rt_key_tos;
 		rt->rt_route_iif = ort->rt_route_iif;
 		rt->rt_iif = ort->rt_iif;
 		rt->rt_oif = ort->rt_oif;
@@ -2762,15 +2758,10 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
 	if (IS_ERR(rt))
 		return rt;
 
-	if (flp4->flowi4_proto) {
-		if (!flp4->saddr)
-			flp4->saddr = rt->rt_src;
-		if (!flp4->daddr)
-			flp4->daddr = rt->rt_dst;
+	if (flp4->flowi4_proto)
 		rt = (struct rtable *) xfrm_lookup(net, &rt->dst,
 						   flowi4_to_flowi(flp4),
 						   sk, 0);
-	}
 
 	return rt;
 }
@@ -2794,7 +2785,7 @@ static int rt_fill_info(struct net *net,
 	r->rtm_family	 = AF_INET;
 	r->rtm_dst_len	= 32;
 	r->rtm_src_len	= 0;
-	r->rtm_tos	= rt->rt_tos;
+	r->rtm_tos	= rt->rt_key_tos;
 	r->rtm_table	= RT_TABLE_MAIN;
 	NLA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
 	r->rtm_type	= rt->rt_type;
@@ -2848,7 +2839,9 @@ static int rt_fill_info(struct net *net,
 
 		if (ipv4_is_multicast(dst) && !ipv4_is_local_multicast(dst) &&
 		    IPV4_DEVCONF_ALL(net, MC_FORWARDING)) {
-			int err = ipmr_get_route(net, skb, r, nowait);
+			int err = ipmr_get_route(net, skb,
+						 rt->rt_src, rt->rt_dst,
+						 r, nowait);
 			if (err <= 0) {
 				if (!nowait) {
 					if (err == 0)
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 8b44c6d..2646149 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -321,10 +321,10 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
 	 * the ACK carries the same options again (see RFC1122 4.2.3.8)
 	 */
 	if (opt && opt->optlen) {
-		int opt_size = sizeof(struct ip_options) + opt->optlen;
+		int opt_size = sizeof(struct ip_options_rcu) + opt->optlen;
 
 		ireq->opt = kmalloc(opt_size, GFP_ATOMIC);
-		if (ireq->opt != NULL && ip_options_echo(ireq->opt, skb)) {
+		if (ireq->opt != NULL && ip_options_echo(&ireq->opt->opt, skb)) {
 			kfree(ireq->opt);
 			ireq->opt = NULL;
 		}
@@ -345,17 +345,13 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
 	 * no easy way to do this.
 	 */
 	{
-		struct flowi4 fl4 = {
-			.flowi4_mark = sk->sk_mark,
-			.daddr = ((opt && opt->srr) ?
-				  opt->faddr : ireq->rmt_addr),
-			.saddr = ireq->loc_addr,
-			.flowi4_tos = RT_CONN_FLAGS(sk),
-			.flowi4_proto = IPPROTO_TCP,
-			.flowi4_flags = inet_sk_flowi_flags(sk),
-			.fl4_sport = th->dest,
-			.fl4_dport = th->source,
-		};
+		struct flowi4 fl4;
+
+		flowi4_init_output(&fl4, 0, sk->sk_mark, RT_CONN_FLAGS(sk),
+				   RT_SCOPE_UNIVERSE, IPPROTO_TCP,
+				   inet_sk_flowi_flags(sk),
+				   (opt && opt->srr) ? opt->faddr : ireq->rmt_addr,
+				   ireq->loc_addr, th->source, th->dest);
 		security_req_classify_flow(req, flowi4_to_flowi(&fl4));
 		rt = ip_route_output_key(sock_net(sk), &fl4);
 		if (IS_ERR(rt)) {
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 321e6e8..57d0752 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -13,6 +13,7 @@
 #include <linux/seqlock.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/nsproxy.h>
 #include <net/snmp.h>
 #include <net/icmp.h>
 #include <net/ip.h>
@@ -21,6 +22,7 @@
 #include <net/udp.h>
 #include <net/cipso_ipv4.h>
 #include <net/inet_frag.h>
+#include <net/ping.h>
 
 static int zero;
 static int tcp_retr1_max = 255;
@@ -30,6 +32,8 @@ static int tcp_adv_win_scale_min = -31;
 static int tcp_adv_win_scale_max = 31;
 static int ip_ttl_min = 1;
 static int ip_ttl_max = 255;
+static int ip_ping_group_range_min[] = { 0, 0 };
+static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
 
 /* Update system visible IP port range */
 static void set_local_port_range(int range[2])
@@ -68,6 +72,53 @@ static int ipv4_local_port_range(ctl_table *table, int write,
 	return ret;
 }
 
+
+void inet_get_ping_group_range_table(struct ctl_table *table, gid_t *low, gid_t *high)
+{
+	gid_t *data = table->data;
+	unsigned seq;
+	do {
+		seq = read_seqbegin(&sysctl_local_ports.lock);
+
+		*low = data[0];
+		*high = data[1];
+	} while (read_seqretry(&sysctl_local_ports.lock, seq));
+}
+
+/* Update system visible IP port range */
+static void set_ping_group_range(struct ctl_table *table, int range[2])
+{
+	gid_t *data = table->data;
+	write_seqlock(&sysctl_local_ports.lock);
+	data[0] = range[0];
+	data[1] = range[1];
+	write_sequnlock(&sysctl_local_ports.lock);
+}
+
+/* Validate changes from /proc interface. */
+static int ipv4_ping_group_range(ctl_table *table, int write,
+				 void __user *buffer,
+				 size_t *lenp, loff_t *ppos)
+{
+	int ret;
+	gid_t range[2];
+	ctl_table tmp = {
+		.data = &range,
+		.maxlen = sizeof(range),
+		.mode = table->mode,
+		.extra1 = &ip_ping_group_range_min,
+		.extra2 = &ip_ping_group_range_max,
+	};
+
+	inet_get_ping_group_range_table(table, range, range + 1);
+	ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
+
+	if (write && ret == 0)
+		set_ping_group_range(table, range);
+
+	return ret;
+}
+
 static int proc_tcp_congestion_control(ctl_table *ctl, int write,
 				       void __user *buffer, size_t *lenp, loff_t *ppos)
 {
@@ -677,6 +728,13 @@ static struct ctl_table ipv4_net_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec
 	},
+	{
+		.procname	= "ping_group_range",
+		.data		= &init_net.ipv4.sysctl_ping_group_range,
+		.maxlen		= sizeof(init_net.ipv4.sysctl_ping_group_range),
+		.mode		= 0644,
+		.proc_handler	= ipv4_ping_group_range,
+	},
 	{ }
 };
 
@@ -711,8 +769,18 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
 			&net->ipv4.sysctl_icmp_ratemask;
 		table[6].data =
 			&net->ipv4.sysctl_rt_cache_rebuild_count;
+		table[7].data =
+			&net->ipv4.sysctl_ping_group_range;
+
 	}
 
+	/*
+	 * Sane defaults - nobody may create ping sockets.
+	 * Boot scripts should set this to distro-specific group.
+	 */
+	net->ipv4.sysctl_ping_group_range[0] = 1;
+	net->ipv4.sysctl_ping_group_range[1] = 0;
+
 	net->ipv4.sysctl_rt_cache_rebuild_count = 4;
 
 	net->ipv4.ipv4_hdr = register_net_sysctl_table(net,
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index b22d450..054a59d 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -999,7 +999,8 @@ new_segment:
 				/* We have some space in skb head. Superb! */
 				if (copy > skb_tailroom(skb))
 					copy = skb_tailroom(skb);
-				if ((err = skb_add_data(skb, from, copy)) != 0)
+				err = skb_add_data_nocache(sk, skb, from, copy);
+				if (err)
 					goto do_fault;
 			} else {
 				int merge = 0;
@@ -1042,8 +1043,8 @@ new_segment:
 
 				/* Time to copy data. We are close to
 				 * the end! */
-				err = skb_copy_to_page(sk, from, skb, page,
-						       off, copy);
+				err = skb_copy_to_page_nocache(sk, from, skb,
+							       page, off, copy);
 				if (err) {
 					/* If this page was new, give it to the
 					 * socket so it does not get leaked.
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index f7e6c2c..3c8d9b6 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -146,13 +146,15 @@ EXPORT_SYMBOL_GPL(tcp_twsk_unique);
 /* This will initiate an outgoing connection. */
 int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 {
+	struct sockaddr_in *usin = (struct sockaddr_in *)uaddr;
 	struct inet_sock *inet = inet_sk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
-	struct sockaddr_in *usin = (struct sockaddr_in *)uaddr;
 	__be16 orig_sport, orig_dport;
-	struct rtable *rt;
 	__be32 daddr, nexthop;
+	struct flowi4 *fl4;
+	struct rtable *rt;
 	int err;
+	struct ip_options_rcu *inet_opt;
 
 	if (addr_len < sizeof(struct sockaddr_in))
 		return -EINVAL;
@@ -161,15 +163,18 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		return -EAFNOSUPPORT;
 
 	nexthop = daddr = usin->sin_addr.s_addr;
-	if (inet->opt && inet->opt->srr) {
+	inet_opt = rcu_dereference_protected(inet->inet_opt,
+					     sock_owned_by_user(sk));
+	if (inet_opt && inet_opt->opt.srr) {
 		if (!daddr)
 			return -EINVAL;
-		nexthop = inet->opt->faddr;
+		nexthop = inet_opt->opt.faddr;
 	}
 
 	orig_sport = inet->inet_sport;
 	orig_dport = usin->sin_port;
-	rt = ip_route_connect(nexthop, inet->inet_saddr,
+	fl4 = &inet->cork.fl.u.ip4;
+	rt = ip_route_connect(fl4, nexthop, inet->inet_saddr,
 			      RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
 			      IPPROTO_TCP,
 			      orig_sport, orig_dport, sk, true);
@@ -185,11 +190,11 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 		return -ENETUNREACH;
 	}
 
-	if (!inet->opt || !inet->opt->srr)
-		daddr = rt->rt_dst;
+	if (!inet_opt || !inet_opt->opt.srr)
+		daddr = fl4->daddr;
 
 	if (!inet->inet_saddr)
-		inet->inet_saddr = rt->rt_src;
+		inet->inet_saddr = fl4->saddr;
 	inet->inet_rcv_saddr = inet->inet_saddr;
 
 	if (tp->rx_opt.ts_recent_stamp && inet->inet_daddr != daddr) {
@@ -200,8 +205,8 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	}
 
 	if (tcp_death_row.sysctl_tw_recycle &&
-	    !tp->rx_opt.ts_recent_stamp && rt->rt_dst == daddr) {
-		struct inet_peer *peer = rt_get_peer(rt);
+	    !tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr) {
+		struct inet_peer *peer = rt_get_peer(rt, fl4->daddr);
 		/*
 		 * VJ's idea. We save last timestamp seen from
 		 * the destination in peer table, when entering state
@@ -221,8 +226,8 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	inet->inet_daddr = daddr;
 
 	inet_csk(sk)->icsk_ext_hdr_len = 0;
-	if (inet->opt)
-		inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
+	if (inet_opt)
+		inet_csk(sk)->icsk_ext_hdr_len = inet_opt->opt.optlen;
 
 	tp->rx_opt.mss_clamp = TCP_MSS_DEFAULT;
 
@@ -236,8 +241,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	if (err)
 		goto failure;
 
-	rt = ip_route_newports(rt, IPPROTO_TCP,
-			       orig_sport, orig_dport,
+	rt = ip_route_newports(fl4, rt, orig_sport, orig_dport,
 			       inet->inet_sport, inet->inet_dport, sk);
 	if (IS_ERR(rt)) {
 		err = PTR_ERR(rt);
@@ -279,7 +283,7 @@ EXPORT_SYMBOL(tcp_v4_connect);
 /*
  * This routine does path mtu discovery as defined in RFC1191.
  */
-static void do_pmtu_discovery(struct sock *sk, struct iphdr *iph, u32 mtu)
+static void do_pmtu_discovery(struct sock *sk, const struct iphdr *iph, u32 mtu)
 {
 	struct dst_entry *dst;
 	struct inet_sock *inet = inet_sk(sk);
@@ -341,7 +345,7 @@ static void do_pmtu_discovery(struct sock *sk, struct iphdr *iph, u32 mtu)
 
 void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
 {
-	struct iphdr *iph = (struct iphdr *)icmp_skb->data;
+	const struct iphdr *iph = (const struct iphdr *)icmp_skb->data;
 	struct tcphdr *th = (struct tcphdr *)(icmp_skb->data + (iph->ihl << 2));
 	struct inet_connection_sock *icsk;
 	struct tcp_sock *tp;
@@ -647,7 +651,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
 	arg.flags = (sk && inet_sk(sk)->transparent) ? IP_REPLY_ARG_NOSRCCHECK : 0;
 
 	net = dev_net(skb_dst(skb)->dev);
-	ip_send_reply(net->ipv4.tcp_sock, skb,
+	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
 		      &arg, arg.iov[0].iov_len);
 
 	TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
@@ -722,7 +726,7 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
 	if (oif)
 		arg.bound_dev_if = oif;
 
-	ip_send_reply(net->ipv4.tcp_sock, skb,
+	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
 		      &arg, arg.iov[0].iov_len);
 
 	TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
@@ -765,11 +769,12 @@ static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst,
 			      struct request_values *rvp)
 {
 	const struct inet_request_sock *ireq = inet_rsk(req);
+	struct flowi4 fl4;
 	int err = -1;
 	struct sk_buff * skb;
 
 	/* First, grab a route. */
-	if (!dst && (dst = inet_csk_route_req(sk, req)) == NULL)
+	if (!dst && (dst = inet_csk_route_req(sk, &fl4, req)) == NULL)
 		return -1;
 
 	skb = tcp_make_synack(sk, dst, req, rvp);
@@ -820,17 +825,18 @@ static void syn_flood_warning(const struct sk_buff *skb)
 /*
  * Save and compile IPv4 options into the request_sock if needed.
  */
-static struct ip_options *tcp_v4_save_options(struct sock *sk,
-					      struct sk_buff *skb)
+static struct ip_options_rcu *tcp_v4_save_options(struct sock *sk,
+						  struct sk_buff *skb)
 {
-	struct ip_options *opt = &(IPCB(skb)->opt);
-	struct ip_options *dopt = NULL;
+	const struct ip_options *opt = &(IPCB(skb)->opt);
+	struct ip_options_rcu *dopt = NULL;
 
 	if (opt && opt->optlen) {
-		int opt_size = optlength(opt);
+		int opt_size = sizeof(*dopt) + opt->optlen;
+
 		dopt = kmalloc(opt_size, GFP_ATOMIC);
 		if (dopt) {
-			if (ip_options_echo(dopt, skb)) {
+			if (ip_options_echo(&dopt->opt, skb)) {
 				kfree(dopt);
 				dopt = NULL;
 			}
@@ -1333,6 +1339,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 		req->cookie_ts = tmp_opt.tstamp_ok;
 	} else if (!isn) {
 		struct inet_peer *peer = NULL;
+		struct flowi4 fl4;
 
 		/* VJ's idea. We save last timestamp seen
 		 * from the destination in peer table, when entering
@@ -1345,9 +1352,9 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 		 */
 		if (tmp_opt.saw_tstamp &&
 		    tcp_death_row.sysctl_tw_recycle &&
-		    (dst = inet_csk_route_req(sk, req)) != NULL &&
-		    (peer = rt_get_peer((struct rtable *)dst)) != NULL &&
-		    peer->daddr.addr.a4 == saddr) {
+		    (dst = inet_csk_route_req(sk, &fl4, req)) != NULL &&
+		    fl4.daddr == saddr &&
+		    (peer = rt_get_peer((struct rtable *)dst, fl4.daddr)) != NULL) {
 			inet_peer_refcheck(peer);
 			if ((u32)get_seconds() - peer->tcp_ts_stamp < TCP_PAWS_MSL &&
 			    (s32)(peer->tcp_ts - req->ts_recent) >
@@ -1411,19 +1418,16 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 #ifdef CONFIG_TCP_MD5SIG
 	struct tcp_md5sig_key *key;
 #endif
+	struct ip_options_rcu *inet_opt;
 
 	if (sk_acceptq_is_full(sk))
 		goto exit_overflow;
 
-	if (!dst && (dst = inet_csk_route_req(sk, req)) == NULL)
-		goto exit;
-
 	newsk = tcp_create_openreq_child(sk, req, skb);
 	if (!newsk)
 		goto exit_nonewsk;
 
 	newsk->sk_gso_type = SKB_GSO_TCPV4;
-	sk_setup_caps(newsk, dst);
 
 	newtp		      = tcp_sk(newsk);
 	newinet		      = inet_sk(newsk);
@@ -1431,15 +1435,21 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 	newinet->inet_daddr   = ireq->rmt_addr;
 	newinet->inet_rcv_saddr = ireq->loc_addr;
 	newinet->inet_saddr	      = ireq->loc_addr;
-	newinet->opt	      = ireq->opt;
+	inet_opt	      = ireq->opt;
+	rcu_assign_pointer(newinet->inet_opt, inet_opt);
 	ireq->opt	      = NULL;
 	newinet->mc_index     = inet_iif(skb);
 	newinet->mc_ttl	      = ip_hdr(skb)->ttl;
 	inet_csk(newsk)->icsk_ext_hdr_len = 0;
-	if (newinet->opt)
-		inet_csk(newsk)->icsk_ext_hdr_len = newinet->opt->optlen;
+	if (inet_opt)
+		inet_csk(newsk)->icsk_ext_hdr_len = inet_opt->opt.optlen;
 	newinet->inet_id = newtp->write_seq ^ jiffies;
 
+	if (!dst && (dst = inet_csk_route_child_sock(sk, newsk, req)) == NULL)
+		goto put_and_exit;
+
+	sk_setup_caps(newsk, dst);
+
 	tcp_mtup_init(newsk);
 	tcp_sync_mss(newsk, dst_mtu(dst));
 	newtp->advmss = dst_metric_advmss(dst);
@@ -1467,10 +1477,8 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 	}
 #endif
 
-	if (__inet_inherit_port(sk, newsk) < 0) {
-		sock_put(newsk);
-		goto exit;
-	}
+	if (__inet_inherit_port(sk, newsk) < 0)
+		goto put_and_exit;
 	__inet_hash_nolisten(newsk, NULL);
 
 	return newsk;
@@ -1482,6 +1490,9 @@ exit_nonewsk:
 exit:
 	NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
 	return NULL;
+put_and_exit:
+	sock_put(newsk);
+	goto exit;
 }
 EXPORT_SYMBOL(tcp_v4_syn_recv_sock);
 
@@ -1764,12 +1775,13 @@ struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it)
 	struct inet_sock *inet = inet_sk(sk);
 	struct inet_peer *peer;
 
-	if (!rt || rt->rt_dst != inet->inet_daddr) {
+	if (!rt ||
+	    inet->cork.fl.u.ip4.daddr != inet->inet_daddr) {
 		peer = inet_getpeer_v4(inet->inet_daddr, 1);
 		*release_it = true;
 	} else {
 		if (!rt->peer)
-			rt_bind_peer(rt, 1);
+			rt_bind_peer(rt, inet->inet_daddr, 1);
 		peer = rt->peer;
 		*release_it = false;
 	}
@@ -2527,7 +2539,7 @@ void tcp4_proc_exit(void)
 
 struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 {
-	struct iphdr *iph = skb_gro_network_header(skb);
+	const struct iphdr *iph = skb_gro_network_header(skb);
 
 	switch (skb->ip_summed) {
 	case CHECKSUM_COMPLETE:
@@ -2548,7 +2560,7 @@ struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 
 int tcp4_gro_complete(struct sk_buff *skb)
 {
-	struct iphdr *iph = ip_hdr(skb);
+	const struct iphdr *iph = ip_hdr(skb);
 	struct tcphdr *th = tcp_hdr(skb);
 
 	th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 17388c7..882e0b0 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -899,7 +899,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
 		TCP_ADD_STATS(sock_net(sk), TCP_MIB_OUTSEGS,
 			      tcp_skb_pcount(skb));
 
-	err = icsk->icsk_af_ops->queue_xmit(skb);
+	err = icsk->icsk_af_ops->queue_xmit(skb, &inet->cork.fl);
 	if (likely(err <= 0))
 		return err;
 
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index f87a8eb..599374f 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -578,7 +578,7 @@ found:
 void __udp4_lib_err(struct sk_buff *skb, u32 info, struct udp_table *udptable)
 {
 	struct inet_sock *inet;
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	struct udphdr *uh = (struct udphdr *)(skb->data+(iph->ihl<<2));
 	const int type = icmp_hdr(skb)->type;
 	const int code = icmp_hdr(skb)->code;
@@ -706,12 +706,11 @@ static void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst)
 	}
 }
 
-static int udp_send_skb(struct sk_buff *skb, __be32 daddr, __be32 dport)
+static int udp_send_skb(struct sk_buff *skb, struct flowi4 *fl4)
 {
 	struct sock *sk = skb->sk;
 	struct inet_sock *inet = inet_sk(sk);
 	struct udphdr *uh;
-	struct rtable *rt = (struct rtable *)skb_dst(skb);
 	int err = 0;
 	int is_udplite = IS_UDPLITE(sk);
 	int offset = skb_transport_offset(skb);
@@ -723,7 +722,7 @@ static int udp_send_skb(struct sk_buff *skb, __be32 daddr, __be32 dport)
 	 */
 	uh = udp_hdr(skb);
 	uh->source = inet->inet_sport;
-	uh->dest = dport;
+	uh->dest = fl4->fl4_dport;
 	uh->len = htons(len);
 	uh->check = 0;
 
@@ -737,14 +736,14 @@ static int udp_send_skb(struct sk_buff *skb, __be32 daddr, __be32 dport)
 
 	} else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */
 
-		udp4_hwcsum(skb, rt->rt_src, daddr);
+		udp4_hwcsum(skb, fl4->saddr, fl4->daddr);
 		goto send;
 
 	} else
 		csum = udp_csum(skb);
 
 	/* add protocol-dependent pseudo-header */
-	uh->check = csum_tcpudp_magic(rt->rt_src, daddr, len,
+	uh->check = csum_tcpudp_magic(fl4->saddr, fl4->daddr, len,
 				      sk->sk_protocol, csum);
 	if (uh->check == 0)
 		uh->check = CSUM_MANGLED_0;
@@ -774,11 +773,11 @@ static int udp_push_pending_frames(struct sock *sk)
 	struct sk_buff *skb;
 	int err = 0;
 
-	skb = ip_finish_skb(sk);
+	skb = ip_finish_skb(sk, fl4);
 	if (!skb)
 		goto out;
 
-	err = udp_send_skb(skb, fl4->daddr, fl4->fl4_dport);
+	err = udp_send_skb(skb, fl4);
 
 out:
 	up->len = 0;
@@ -791,6 +790,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct udp_sock *up = udp_sk(sk);
+	struct flowi4 fl4_stack;
 	struct flowi4 *fl4;
 	int ulen = len;
 	struct ipcm_cookie ipc;
@@ -804,6 +804,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	int corkreq = up->corkflag || msg->msg_flags&MSG_MORE;
 	int (*getfrag)(void *, char *, int, int, int, struct sk_buff *);
 	struct sk_buff *skb;
+	struct ip_options_data opt_copy;
 
 	if (len > 0xFFFF)
 		return -EMSGSIZE;
@@ -820,6 +821,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 
 	getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
 
+	fl4 = &inet->cork.fl.u.ip4;
 	if (up->pending) {
 		/*
 		 * There are pending frames.
@@ -877,22 +879,32 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 			free = 1;
 		connected = 0;
 	}
-	if (!ipc.opt)
-		ipc.opt = inet->opt;
+	if (!ipc.opt) {
+		struct ip_options_rcu *inet_opt;
+
+		rcu_read_lock();
+		inet_opt = rcu_dereference(inet->inet_opt);
+		if (inet_opt) {
+			memcpy(&opt_copy, inet_opt,
+			       sizeof(*inet_opt) + inet_opt->opt.optlen);
+			ipc.opt = &opt_copy.opt;
+		}
+		rcu_read_unlock();
+	}
 
 	saddr = ipc.addr;
 	ipc.addr = faddr = daddr;
 
-	if (ipc.opt && ipc.opt->srr) {
+	if (ipc.opt && ipc.opt->opt.srr) {
 		if (!daddr)
 			return -EINVAL;
-		faddr = ipc.opt->faddr;
+		faddr = ipc.opt->opt.faddr;
 		connected = 0;
 	}
 	tos = RT_TOS(inet->tos);
 	if (sock_flag(sk, SOCK_LOCALROUTE) ||
 	    (msg->msg_flags & MSG_DONTROUTE) ||
-	    (ipc.opt && ipc.opt->is_strictroute)) {
+	    (ipc.opt && ipc.opt->opt.is_strictroute)) {
 		tos |= RTO_ONLINK;
 		connected = 0;
 	}
@@ -909,22 +921,16 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		rt = (struct rtable *)sk_dst_check(sk, 0);
 
 	if (rt == NULL) {
-		struct flowi4 fl4 = {
-			.flowi4_oif = ipc.oif,
-			.flowi4_mark = sk->sk_mark,
-			.daddr = faddr,
-			.saddr = saddr,
-			.flowi4_tos = tos,
-			.flowi4_proto = sk->sk_protocol,
-			.flowi4_flags = (inet_sk_flowi_flags(sk) |
-					 FLOWI_FLAG_CAN_SLEEP),
-			.fl4_sport = inet->inet_sport,
-			.fl4_dport = dport,
-		};
 		struct net *net = sock_net(sk);
 
-		security_sk_classify_flow(sk, flowi4_to_flowi(&fl4));
-		rt = ip_route_output_flow(net, &fl4, sk);
+		fl4 = &fl4_stack;
+		flowi4_init_output(fl4, ipc.oif, sk->sk_mark, tos,
+				   RT_SCOPE_UNIVERSE, sk->sk_protocol,
+				   inet_sk_flowi_flags(sk)|FLOWI_FLAG_CAN_SLEEP,
+				   faddr, saddr, dport, inet->inet_sport);
+
+		security_sk_classify_flow(sk, flowi4_to_flowi(fl4));
+		rt = ip_route_output_flow(net, fl4, sk);
 		if (IS_ERR(rt)) {
 			err = PTR_ERR(rt);
 			rt = NULL;
@@ -945,18 +951,18 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		goto do_confirm;
 back_from_confirm:
 
-	saddr = rt->rt_src;
+	saddr = fl4->saddr;
 	if (!ipc.addr)
-		daddr = ipc.addr = rt->rt_dst;
+		daddr = ipc.addr = fl4->daddr;
 
 	/* Lockless fast path for the non-corking case. */
 	if (!corkreq) {
-		skb = ip_make_skb(sk, getfrag, msg->msg_iov, ulen,
+		skb = ip_make_skb(sk, fl4, getfrag, msg->msg_iov, ulen,
 				  sizeof(struct udphdr), &ipc, &rt,
 				  msg->msg_flags);
 		err = PTR_ERR(skb);
 		if (skb && !IS_ERR(skb))
-			err = udp_send_skb(skb, daddr, dport);
+			err = udp_send_skb(skb, fl4);
 		goto out;
 	}
 
@@ -982,9 +988,9 @@ back_from_confirm:
 
 do_append_data:
 	up->len += ulen;
-	err = ip_append_data(sk, getfrag, msg->msg_iov, ulen,
-			sizeof(struct udphdr), &ipc, &rt,
-			corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
+	err = ip_append_data(sk, fl4, getfrag, msg->msg_iov, ulen,
+			     sizeof(struct udphdr), &ipc, &rt,
+			     corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
 	if (err)
 		udp_flush_pending_frames(sk);
 	else if (!corkreq)
@@ -1024,6 +1030,7 @@ EXPORT_SYMBOL(udp_sendmsg);
 int udp_sendpage(struct sock *sk, struct page *page, int offset,
 		 size_t size, int flags)
 {
+	struct inet_sock *inet = inet_sk(sk);
 	struct udp_sock *up = udp_sk(sk);
 	int ret;
 
@@ -1048,7 +1055,8 @@ int udp_sendpage(struct sock *sk, struct page *page, int offset,
 		return -EINVAL;
 	}
 
-	ret = ip_append_page(sk, page, offset, size, flags);
+	ret = ip_append_page(sk, &inet->cork.fl.u.ip4,
+			     page, offset, size, flags);
 	if (ret == -EOPNOTSUPP) {
 		release_sock(sk);
 		return sock_no_sendpage(sk->sk_socket, page, offset,
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index d20a05e..981e43e 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -18,38 +18,46 @@
 
 static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
 
-static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
-					  const xfrm_address_t *saddr,
-					  const xfrm_address_t *daddr)
+static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4,
+					    int tos,
+					    const xfrm_address_t *saddr,
+					    const xfrm_address_t *daddr)
 {
-	struct flowi4 fl4 = {
-		.daddr = daddr->a4,
-		.flowi4_tos = tos,
-	};
 	struct rtable *rt;
 
+	memset(fl4, 0, sizeof(*fl4));
+	fl4->daddr = daddr->a4;
+	fl4->flowi4_tos = tos;
 	if (saddr)
-		fl4.saddr = saddr->a4;
+		fl4->saddr = saddr->a4;
 
-	rt = __ip_route_output_key(net, &fl4);
+	rt = __ip_route_output_key(net, fl4);
 	if (!IS_ERR(rt))
 		return &rt->dst;
 
 	return ERR_CAST(rt);
 }
 
+static struct dst_entry *xfrm4_dst_lookup(struct net *net, int tos,
+					  const xfrm_address_t *saddr,
+					  const xfrm_address_t *daddr)
+{
+	struct flowi4 fl4;
+
+	return __xfrm4_dst_lookup(net, &fl4, tos, saddr, daddr);
+}
+
 static int xfrm4_get_saddr(struct net *net,
 			   xfrm_address_t *saddr, xfrm_address_t *daddr)
 {
 	struct dst_entry *dst;
-	struct rtable *rt;
+	struct flowi4 fl4;
 
-	dst = xfrm4_dst_lookup(net, 0, NULL, daddr);
+	dst = __xfrm4_dst_lookup(net, &fl4, 0, NULL, daddr);
 	if (IS_ERR(dst))
 		return -EHOSTUNREACH;
 
-	rt = (struct rtable *)dst;
-	saddr->a4 = rt->rt_src;
+	saddr->a4 = fl4.saddr;
 	dst_release(dst);
 	return 0;
 }
@@ -73,7 +81,7 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
 
 	rt->rt_key_dst = fl4->daddr;
 	rt->rt_key_src = fl4->saddr;
-	rt->rt_tos = fl4->flowi4_tos;
+	rt->rt_key_tos = fl4->flowi4_tos;
 	rt->rt_route_iif = fl4->flowi4_iif;
 	rt->rt_iif = fl4->flowi4_iif;
 	rt->rt_oif = fl4->flowi4_oif;
@@ -102,7 +110,7 @@ static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
 static void
 _decode_session4(struct sk_buff *skb, struct flowi *fl, int reverse)
 {
-	struct iphdr *iph = ip_hdr(skb);
+	const struct iphdr *iph = ip_hdr(skb);
 	u8 *xprth = skb_network_header(skb) + iph->ihl * 4;
 	struct flowi4 *fl4 = &fl->u.ip4;
 
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index 805d63e..d9ac0a0 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -55,7 +55,7 @@ xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
 
 int xfrm4_extract_header(struct sk_buff *skb)
 {
-	struct iphdr *iph = ip_hdr(skb);
+	const struct iphdr *iph = ip_hdr(skb);
 
 	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
 	XFRM_MODE_SKB_CB(skb)->id = iph->id;
author	Linus Torvalds <torvalds@linux-foundation.org>	2011-05-20 13:43:21 -0700
committer	Linus Torvalds <torvalds@linux-foundation.org>	2011-05-20 13:43:21 -0700
commit	06f4e926d256d902dd9a53dcb400fd74974ce087 (patch)
tree	0b438b67f5f0eff6fd617bc497a9dace6164a488 /net/ipv4
parent	8e7bfcbab3825d1b404d615cb1b54f44ff81f981 (diff)
parent	d93515611bbc70c2fe4db232e5feb448ed8e4cc9 (diff)
download	op-kernel-dev-06f4e926d256d902dd9a53dcb400fd74974ce087.zip op-kernel-dev-06f4e926d256d902dd9a53dcb400fd74974ce087.tar.gz