Merge commit 'v3.5-rc5' into next

15 files changed, 785 insertions, 417 deletions

diff --git a/net/netfilter/ipvs/ip_vs_app.c b/net/netfilter/ipvs/ip_vs_app.c
index 52856178c9d7..64f9e8f13207 100644
--- a/net/netfilter/ipvs/ip_vs_app.c
+++ b/net/netfilter/ipvs/ip_vs_app.c
@@ -313,7 +313,7 @@ vs_fix_ack_seq(const struct ip_vs_seq *vseq, struct tcphdr *th)
  *	Assumes already checked proto==IPPROTO_TCP and diff!=0.
  */
 static inline void vs_seq_update(struct ip_vs_conn *cp, struct ip_vs_seq *vseq,
-				 unsigned flag, __u32 seq, int diff)
+				 unsigned int flag, __u32 seq, int diff)
 {
 	/* spinlock is to keep updating cp->flags atomic */
 	spin_lock(&cp->lock);
diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
index 29fa5badde75..1548df9a7524 100644
--- a/net/netfilter/ipvs/ip_vs_conn.c
+++ b/net/netfilter/ipvs/ip_vs_conn.c
@@ -86,42 +86,42 @@ struct ip_vs_aligned_lock
 static struct ip_vs_aligned_lock
 __ip_vs_conntbl_lock_array[CT_LOCKARRAY_SIZE] __cacheline_aligned;
 
-static inline void ct_read_lock(unsigned key)
+static inline void ct_read_lock(unsigned int key)
 {
 	read_lock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_read_unlock(unsigned key)
+static inline void ct_read_unlock(unsigned int key)
 {
 	read_unlock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_write_lock(unsigned key)
+static inline void ct_write_lock(unsigned int key)
 {
 	write_lock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_write_unlock(unsigned key)
+static inline void ct_write_unlock(unsigned int key)
 {
 	write_unlock(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_read_lock_bh(unsigned key)
+static inline void ct_read_lock_bh(unsigned int key)
 {
 	read_lock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_read_unlock_bh(unsigned key)
+static inline void ct_read_unlock_bh(unsigned int key)
 {
 	read_unlock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_write_lock_bh(unsigned key)
+static inline void ct_write_lock_bh(unsigned int key)
 {
 	write_lock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
 
-static inline void ct_write_unlock_bh(unsigned key)
+static inline void ct_write_unlock_bh(unsigned int key)
 {
 	write_unlock_bh(&__ip_vs_conntbl_lock_array[key&CT_LOCKARRAY_MASK].l);
 }
@@ -130,7 +130,7 @@ static inline void ct_write_unlock_bh(unsigned key)
 /*
  *	Returns hash value for IPVS connection entry
  */
-static unsigned int ip_vs_conn_hashkey(struct net *net, int af, unsigned proto,
+static unsigned int ip_vs_conn_hashkey(struct net *net, int af, unsigned int proto,
 				       const union nf_inet_addr *addr,
 				       __be16 port)
 {
@@ -188,7 +188,7 @@ static unsigned int ip_vs_conn_hashkey_conn(const struct ip_vs_conn *cp)
  */
 static inline int ip_vs_conn_hash(struct ip_vs_conn *cp)
 {
-	unsigned hash;
+	unsigned int hash;
 	int ret;
 
 	if (cp->flags & IP_VS_CONN_F_ONE_PACKET)
@@ -224,7 +224,7 @@ static inline int ip_vs_conn_hash(struct ip_vs_conn *cp)
  */
 static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp)
 {
-	unsigned hash;
+	unsigned int hash;
 	int ret;
 
 	/* unhash it and decrease its reference counter */
@@ -257,7 +257,7 @@ static inline int ip_vs_conn_unhash(struct ip_vs_conn *cp)
 static inline struct ip_vs_conn *
 __ip_vs_conn_in_get(const struct ip_vs_conn_param *p)
 {
-	unsigned hash;
+	unsigned int hash;
 	struct ip_vs_conn *cp;
 	struct hlist_node *n;
 
@@ -344,7 +344,7 @@ EXPORT_SYMBOL_GPL(ip_vs_conn_in_get_proto);
 /* Get reference to connection template */
 struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p)
 {
-	unsigned hash;
+	unsigned int hash;
 	struct ip_vs_conn *cp;
 	struct hlist_node *n;
 
@@ -394,7 +394,7 @@ struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p)
  *	p->vaddr, p->vport: pkt dest address (foreign host) */
 struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p)
 {
-	unsigned hash;
+	unsigned int hash;
 	struct ip_vs_conn *cp, *ret=NULL;
 	struct hlist_node *n;
 
@@ -548,6 +548,7 @@ static inline void
 ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
 {
 	unsigned int conn_flags;
+	__u32 flags;
 
 	/* if dest is NULL, then return directly */
 	if (!dest)
@@ -559,17 +560,19 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
 	conn_flags = atomic_read(&dest->conn_flags);
 	if (cp->protocol != IPPROTO_UDP)
 		conn_flags &= ~IP_VS_CONN_F_ONE_PACKET;
+	flags = cp->flags;
 	/* Bind with the destination and its corresponding transmitter */
-	if (cp->flags & IP_VS_CONN_F_SYNC) {
+	if (flags & IP_VS_CONN_F_SYNC) {
 		/* if the connection is not template and is created
 		 * by sync, preserve the activity flag.
 		 */
-		if (!(cp->flags & IP_VS_CONN_F_TEMPLATE))
+		if (!(flags & IP_VS_CONN_F_TEMPLATE))
 			conn_flags &= ~IP_VS_CONN_F_INACTIVE;
 		/* connections inherit forwarding method from dest */
-		cp->flags &= ~IP_VS_CONN_F_FWD_MASK;
+		flags &= ~(IP_VS_CONN_F_FWD_MASK | IP_VS_CONN_F_NOOUTPUT);
 	}
-	cp->flags |= conn_flags;
+	flags |= conn_flags;
+	cp->flags = flags;
 	cp->dest = dest;
 
 	IP_VS_DBG_BUF(7, "Bind-dest %s c:%s:%d v:%s:%d "
@@ -584,12 +587,12 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest)
 		      atomic_read(&dest->refcnt));
 
 	/* Update the connection counters */
-	if (!(cp->flags & IP_VS_CONN_F_TEMPLATE)) {
-		/* It is a normal connection, so increase the inactive
-		   connection counter because it is in TCP SYNRECV
-		   state (inactive) or other protocol inacive state */
-		if ((cp->flags & IP_VS_CONN_F_SYNC) &&
-		    (!(cp->flags & IP_VS_CONN_F_INACTIVE)))
+	if (!(flags & IP_VS_CONN_F_TEMPLATE)) {
+		/* It is a normal connection, so modify the counters
+		 * according to the flags, later the protocol can
+		 * update them on state change
+		 */
+		if (!(flags & IP_VS_CONN_F_INACTIVE))
 			atomic_inc(&dest->activeconns);
 		else
 			atomic_inc(&dest->inactconns);
@@ -613,14 +616,40 @@ struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp)
 {
 	struct ip_vs_dest *dest;
 
-	if ((cp) && (!cp->dest)) {
-		dest = ip_vs_find_dest(ip_vs_conn_net(cp), cp->af, &cp->daddr,
-				       cp->dport, &cp->vaddr, cp->vport,
-				       cp->protocol, cp->fwmark, cp->flags);
+	dest = ip_vs_find_dest(ip_vs_conn_net(cp), cp->af, &cp->daddr,
+			       cp->dport, &cp->vaddr, cp->vport,
+			       cp->protocol, cp->fwmark, cp->flags);
+	if (dest) {
+		struct ip_vs_proto_data *pd;
+
+		spin_lock(&cp->lock);
+		if (cp->dest) {
+			spin_unlock(&cp->lock);
+			return dest;
+		}
+
+		/* Applications work depending on the forwarding method
+		 * but better to reassign them always when binding dest */
+		if (cp->app)
+			ip_vs_unbind_app(cp);
+
 		ip_vs_bind_dest(cp, dest);
-		return dest;
-	} else
-		return NULL;
+		spin_unlock(&cp->lock);
+
+		/* Update its packet transmitter */
+		cp->packet_xmit = NULL;
+#ifdef CONFIG_IP_VS_IPV6
+		if (cp->af == AF_INET6)
+			ip_vs_bind_xmit_v6(cp);
+		else
+#endif
+			ip_vs_bind_xmit(cp);
+
+		pd = ip_vs_proto_data_get(ip_vs_conn_net(cp), cp->protocol);
+		if (pd && atomic_read(&pd->appcnt))
+			ip_vs_bind_app(cp, pd->pp);
+	}
+	return dest;
 }
 
 
@@ -743,7 +772,8 @@ int ip_vs_check_template(struct ip_vs_conn *ct)
 static void ip_vs_conn_expire(unsigned long data)
 {
 	struct ip_vs_conn *cp = (struct ip_vs_conn *)data;
-	struct netns_ipvs *ipvs = net_ipvs(ip_vs_conn_net(cp));
+	struct net *net = ip_vs_conn_net(cp);
+	struct netns_ipvs *ipvs = net_ipvs(net);
 
 	cp->timeout = 60*HZ;
 
@@ -808,6 +838,9 @@ static void ip_vs_conn_expire(unsigned long data)
 		  atomic_read(&cp->refcnt)-1,
 		  atomic_read(&cp->n_control));
 
+	if (ipvs->sync_state & IP_VS_STATE_MASTER)
+		ip_vs_sync_conn(net, cp, sysctl_sync_threshold(ipvs));
+
 	ip_vs_conn_put(cp);
 }
 
@@ -824,7 +857,7 @@ void ip_vs_conn_expire_now(struct ip_vs_conn *cp)
  */
 struct ip_vs_conn *
 ip_vs_conn_new(const struct ip_vs_conn_param *p,
-	       const union nf_inet_addr *daddr, __be16 dport, unsigned flags,
+	       const union nf_inet_addr *daddr, __be16 dport, unsigned int flags,
 	       struct ip_vs_dest *dest, __u32 fwmark)
 {
 	struct ip_vs_conn *cp;
@@ -881,6 +914,7 @@ ip_vs_conn_new(const struct ip_vs_conn_param *p,
 	/* Set its state and timeout */
 	cp->state = 0;
 	cp->timeout = 3*HZ;
+	cp->sync_endtime = jiffies & ~3UL;
 
 	/* Bind its packet transmitter */
 #ifdef CONFIG_IP_VS_IPV6
@@ -1057,7 +1091,7 @@ static const struct file_operations ip_vs_conn_fops = {
 	.release = seq_release_net,
 };
 
-static const char *ip_vs_origin_name(unsigned flags)
+static const char *ip_vs_origin_name(unsigned int flags)
 {
 	if (flags & IP_VS_CONN_F_SYNC)
 		return "SYNC";
@@ -1169,7 +1203,7 @@ void ip_vs_random_dropentry(struct net *net)
 	 * Randomly scan 1/32 of the whole table every second
 	 */
 	for (idx = 0; idx < (ip_vs_conn_tab_size>>5); idx++) {
-		unsigned hash = net_random() & ip_vs_conn_tab_mask;
+		unsigned int hash = net_random() & ip_vs_conn_tab_mask;
 		struct hlist_node *n;
 
 		/*
diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index 2555816e7788..a54b018c6eea 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -80,7 +80,7 @@ static atomic_t ipvs_netns_cnt = ATOMIC_INIT(0);
 #define icmp_id(icmph)          (((icmph)->un).echo.id)
 #define icmpv6_id(icmph)        (icmph->icmp6_dataun.u_echo.identifier)
 
-const char *ip_vs_proto_name(unsigned proto)
+const char *ip_vs_proto_name(unsigned int proto)
 {
 	static char buf[20];
 
@@ -1613,34 +1613,8 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
 	else
 		pkts = atomic_add_return(1, &cp->in_pkts);
 
-	if ((ipvs->sync_state & IP_VS_STATE_MASTER) &&
-	    cp->protocol == IPPROTO_SCTP) {
-		if ((cp->state == IP_VS_SCTP_S_ESTABLISHED &&
-			(pkts % sysctl_sync_period(ipvs)
-			 == sysctl_sync_threshold(ipvs))) ||
-				(cp->old_state != cp->state &&
-				 ((cp->state == IP_VS_SCTP_S_CLOSED) ||
-				  (cp->state == IP_VS_SCTP_S_SHUT_ACK_CLI) ||
-				  (cp->state == IP_VS_SCTP_S_SHUT_ACK_SER)))) {
-			ip_vs_sync_conn(net, cp);
-			goto out;
-		}
-	}
-
-	/* Keep this block last: TCP and others with pp->num_states <= 1 */
-	else if ((ipvs->sync_state & IP_VS_STATE_MASTER) &&
-	    (((cp->protocol != IPPROTO_TCP ||
-	       cp->state == IP_VS_TCP_S_ESTABLISHED) &&
-	      (pkts % sysctl_sync_period(ipvs)
-	       == sysctl_sync_threshold(ipvs))) ||
-	     ((cp->protocol == IPPROTO_TCP) && (cp->old_state != cp->state) &&
-	      ((cp->state == IP_VS_TCP_S_FIN_WAIT) ||
-	       (cp->state == IP_VS_TCP_S_CLOSE) ||
-	       (cp->state == IP_VS_TCP_S_CLOSE_WAIT) ||
-	       (cp->state == IP_VS_TCP_S_TIME_WAIT)))))
-		ip_vs_sync_conn(net, cp);
-out:
-	cp->old_state = cp->state;
+	if (ipvs->sync_state & IP_VS_STATE_MASTER)
+		ip_vs_sync_conn(net, cp, pkts);
 
 	ip_vs_conn_put(cp);
 	return ret;
@@ -1924,6 +1898,7 @@ protocol_fail:
 control_fail:
 	ip_vs_estimator_net_cleanup(net);
 estimator_fail:
+	net->ipvs = NULL;
 	return -ENOMEM;
 }
 
@@ -1936,6 +1911,7 @@ static void __net_exit __ip_vs_cleanup(struct net *net)
 	ip_vs_control_net_cleanup(net);
 	ip_vs_estimator_net_cleanup(net);
 	IP_VS_DBG(2, "ipvs netns %d released\n", net_ipvs(net)->gen);
+	net->ipvs = NULL;
 }
 
 static void __net_exit __ip_vs_dev_cleanup(struct net *net)
@@ -1993,10 +1969,18 @@ static int __init ip_vs_init(void)
 		goto cleanup_dev;
 	}
 
+	ret = ip_vs_register_nl_ioctl();
+	if (ret < 0) {
+		pr_err("can't register netlink/ioctl.\n");
+		goto cleanup_hooks;
+	}
+
 	pr_info("ipvs loaded.\n");
 
 	return ret;
 
+cleanup_hooks:
+	nf_unregister_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
 cleanup_dev:
 	unregister_pernet_device(&ipvs_core_dev_ops);
 cleanup_sub:
@@ -2012,6 +1996,7 @@ exit:
 
 static void __exit ip_vs_cleanup(void)
 {
+	ip_vs_unregister_nl_ioctl();
 	nf_unregister_hooks(ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
 	unregister_pernet_device(&ipvs_core_dev_ops);
 	unregister_pernet_subsys(&ipvs_core_ops);	/* free ip_vs struct */
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index b3afe189af61..dd811b8dd97c 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -265,11 +265,11 @@ static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
 /*
  *	Returns hash value for virtual service
  */
-static inline unsigned
-ip_vs_svc_hashkey(struct net *net, int af, unsigned proto,
+static inline unsigned int
+ip_vs_svc_hashkey(struct net *net, int af, unsigned int proto,
 		  const union nf_inet_addr *addr, __be16 port)
 {
-	register unsigned porth = ntohs(port);
+	register unsigned int porth = ntohs(port);
 	__be32 addr_fold = addr->ip;
 
 #ifdef CONFIG_IP_VS_IPV6
@@ -286,7 +286,7 @@ ip_vs_svc_hashkey(struct net *net, int af, unsigned proto,
 /*
  *	Returns hash value of fwmark for virtual service lookup
  */
-static inline unsigned ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
+static inline unsigned int ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
 {
 	return (((size_t)net>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
 }
@@ -298,7 +298,7 @@ static inline unsigned ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
  */
 static int ip_vs_svc_hash(struct ip_vs_service *svc)
 {
-	unsigned hash;
+	unsigned int hash;
 
 	if (svc->flags & IP_VS_SVC_F_HASHED) {
 		pr_err("%s(): request for already hashed, called from %pF\n",
@@ -361,7 +361,7 @@ static inline struct ip_vs_service *
 __ip_vs_service_find(struct net *net, int af, __u16 protocol,
 		     const union nf_inet_addr *vaddr, __be16 vport)
 {
-	unsigned hash;
+	unsigned int hash;
 	struct ip_vs_service *svc;
 
 	/* Check for "full" addressed entries */
@@ -388,7 +388,7 @@ __ip_vs_service_find(struct net *net, int af, __u16 protocol,
 static inline struct ip_vs_service *
 __ip_vs_svc_fwm_find(struct net *net, int af, __u32 fwmark)
 {
-	unsigned hash;
+	unsigned int hash;
 	struct ip_vs_service *svc;
 
 	/* Check for fwmark addressed entries */
@@ -489,11 +489,11 @@ __ip_vs_unbind_svc(struct ip_vs_dest *dest)
 /*
  *	Returns hash value for real service
  */
-static inline unsigned ip_vs_rs_hashkey(int af,
+static inline unsigned int ip_vs_rs_hashkey(int af,
 					    const union nf_inet_addr *addr,
 					    __be16 port)
 {
-	register unsigned porth = ntohs(port);
+	register unsigned int porth = ntohs(port);
 	__be32 addr_fold = addr->ip;
 
 #ifdef CONFIG_IP_VS_IPV6
@@ -512,7 +512,7 @@ static inline unsigned ip_vs_rs_hashkey(int af,
  */
 static int ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
 {
-	unsigned hash;
+	unsigned int hash;
 
 	if (!list_empty(&dest->d_list)) {
 		return 0;
@@ -555,7 +555,7 @@ ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol,
 			  __be16 dport)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
-	unsigned hash;
+	unsigned int hash;
 	struct ip_vs_dest *dest;
 
 	/*
@@ -842,7 +842,7 @@ ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
 	       struct ip_vs_dest **dest_p)
 {
 	struct ip_vs_dest *dest;
-	unsigned atype;
+	unsigned int atype;
 
 	EnterFunction(2);
 
@@ -1599,6 +1599,10 @@ static int ip_vs_zero_all(struct net *net)
 }
 
 #ifdef CONFIG_SYSCTL
+
+static int zero;
+static int three = 3;
+
 static int
 proc_do_defense_mode(ctl_table *table, int write,
 		     void __user *buffer, size_t *lenp, loff_t *ppos)
@@ -1632,7 +1636,8 @@ proc_do_sync_threshold(ctl_table *table, int write,
 	memcpy(val, valp, sizeof(val));
 
 	rc = proc_dointvec(table, write, buffer, lenp, ppos);
-	if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
+	if (write && (valp[0] < 0 || valp[1] < 0 ||
+	    (valp[0] >= valp[1] && valp[1]))) {
 		/* Restore the correct value */
 		memcpy(valp, val, sizeof(val));
 	}
@@ -1652,9 +1657,24 @@ proc_do_sync_mode(ctl_table *table, int write,
 		if ((*valp < 0) || (*valp > 1)) {
 			/* Restore the correct value */
 			*valp = val;
-		} else {
-			struct net *net = current->nsproxy->net_ns;
-			ip_vs_sync_switch_mode(net, val);
+		}
+	}
+	return rc;
+}
+
+static int
+proc_do_sync_ports(ctl_table *table, int write,
+		   void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	int *valp = table->data;
+	int val = *valp;
+	int rc;
+
+	rc = proc_dointvec(table, write, buffer, lenp, ppos);
+	if (write && (*valp != val)) {
+		if (*valp < 1 || !is_power_of_2(*valp)) {
+			/* Restore the correct value */
+			*valp = val;
 		}
 	}
 	return rc;
@@ -1718,6 +1738,24 @@ static struct ctl_table vs_vars[] = {
 		.proc_handler	= &proc_do_sync_mode,
 	},
 	{
+		.procname	= "sync_ports",
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_do_sync_ports,
+	},
+	{
+		.procname	= "sync_qlen_max",
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+	{
+		.procname	= "sync_sock_size",
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+	{
 		.procname	= "cache_bypass",
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
@@ -1743,6 +1781,20 @@ static struct ctl_table vs_vars[] = {
 		.proc_handler	= proc_do_sync_threshold,
 	},
 	{
+		.procname	= "sync_refresh_period",
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_jiffies,
+	},
+	{
+		.procname	= "sync_retries",
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= &zero,
+		.extra2		= &three,
+	},
+	{
 		.procname	= "nat_icmp_send",
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
@@ -1846,13 +1898,6 @@ static struct ctl_table vs_vars[] = {
 	{ }
 };
 
-const struct ctl_path net_vs_ctl_path[] = {
-	{ .procname = "net", },
-	{ .procname = "ipv4", },
-	{ .procname = "vs", },
-	{ }
-};
-EXPORT_SYMBOL_GPL(net_vs_ctl_path);
 #endif
 
 #ifdef CONFIG_PROC_FS
@@ -1867,7 +1912,7 @@ struct ip_vs_iter {
  *	Write the contents of the VS rule table to a PROCfs file.
  *	(It is kept just for backward compatibility)
  */
-static inline const char *ip_vs_fwd_name(unsigned flags)
+static inline const char *ip_vs_fwd_name(unsigned int flags)
 {
 	switch (flags & IP_VS_CONN_F_FWD_MASK) {
 	case IP_VS_CONN_F_LOCALNODE:
@@ -2816,17 +2861,17 @@ static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
 
 	ip_vs_copy_stats(&ustats, stats);
 
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts);
-	NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes);
-	NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, ustats.cps);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps);
-	NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps);
-
+	if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts) ||
+	    nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes) ||
+	    nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_CPS, ustats.cps) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps) ||
+	    nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps))
+		goto nla_put_failure;
 	nla_nest_end(skb, nl_stats);
 
 	return 0;
@@ -2847,23 +2892,25 @@ static int ip_vs_genl_fill_service(struct sk_buff *skb,
 	if (!nl_service)
 		return -EMSGSIZE;
 
-	NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af);
-
+	if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
+		goto nla_put_failure;
 	if (svc->fwmark) {
-		NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
+		if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
+			goto nla_put_failure;
 	} else {
-		NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
-		NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
-		NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
+		if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
+		    nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
+		    nla_put_u16(skb, IPVS_SVC_ATTR_PORT, svc->port))
+			goto nla_put_failure;
 	}
 
-	NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
-	if (svc->pe)
-		NLA_PUT_STRING(skb, IPVS_SVC_ATTR_PE_NAME, svc->pe->name);
-	NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
-	NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
-	NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
-
+	if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name) ||
+	    (svc->pe &&
+	     nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, svc->pe->name)) ||
+	    nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
+	    nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
+	    nla_put_u32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
+		goto nla_put_failure;
 	if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
 		goto nla_put_failure;
 
@@ -3038,21 +3085,22 @@ static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
 	if (!nl_dest)
 		return -EMSGSIZE;
 
-	NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
-	NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
-
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
-		    atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
-		    atomic_read(&dest->activeconns));
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
-		    atomic_read(&dest->inactconns));
-	NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
-		    atomic_read(&dest->persistconns));
-
+	if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
+	    nla_put_u16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
+			(atomic_read(&dest->conn_flags) &
+			 IP_VS_CONN_F_FWD_MASK)) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
+			atomic_read(&dest->weight)) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
+			atomic_read(&dest->activeconns)) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
+			atomic_read(&dest->inactconns)) ||
+	    nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
+			atomic_read(&dest->persistconns)))
+		goto nla_put_failure;
 	if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
 		goto nla_put_failure;
 
@@ -3181,10 +3229,10 @@ static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
 	if (!nl_daemon)
 		return -EMSGSIZE;
 
-	NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
-	NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
-	NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
-
+	if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
+	    nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
+	    nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
+		goto nla_put_failure;
 	nla_nest_end(skb, nl_daemon);
 
 	return 0;
@@ -3473,21 +3521,26 @@ static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
 
 		__ip_vs_get_timeouts(net, &t);
 #ifdef CONFIG_IP_VS_PROTO_TCP
-		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
-		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
-			    t.tcp_fin_timeout);
+		if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
+				t.tcp_timeout) ||
+		    nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
+				t.tcp_fin_timeout))
+			goto nla_put_failure;
 #endif
 #ifdef CONFIG_IP_VS_PROTO_UDP
-		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
+		if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
+			goto nla_put_failure;
 #endif
 
 		break;
 	}
 
 	case IPVS_CMD_GET_INFO:
-		NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
-		NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
-			    ip_vs_conn_tab_size);
+		if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
+				IP_VS_VERSION_CODE) ||
+		    nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
+				ip_vs_conn_tab_size))
+			goto nla_put_failure;
 		break;
 	}
 
@@ -3654,6 +3707,12 @@ int __net_init ip_vs_control_net_init_sysctl(struct net *net)
 	tbl[idx++].data = &ipvs->sysctl_snat_reroute;
 	ipvs->sysctl_sync_ver = 1;
 	tbl[idx++].data = &ipvs->sysctl_sync_ver;
+	ipvs->sysctl_sync_ports = 1;
+	tbl[idx++].data = &ipvs->sysctl_sync_ports;
+	ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
+	tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
+	ipvs->sysctl_sync_sock_size = 0;
+	tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
 	tbl[idx++].data = &ipvs->sysctl_cache_bypass;
 	tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
 	tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
@@ -3661,11 +3720,14 @@ int __net_init ip_vs_control_net_init_sysctl(struct net *net)
 	ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
 	tbl[idx].data = &ipvs->sysctl_sync_threshold;
 	tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
+	ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
+	tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
+	ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
+	tbl[idx++].data = &ipvs->sysctl_sync_retries;
 	tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
 
 
-	ipvs->sysctl_hdr = register_net_sysctl_table(net, net_vs_ctl_path,
-						     tbl);
+	ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
 	if (ipvs->sysctl_hdr == NULL) {
 		if (!net_eq(net, &init_net))
 			kfree(tbl);
@@ -3680,7 +3742,7 @@ int __net_init ip_vs_control_net_init_sysctl(struct net *net)
 	return 0;
 }
 
-void __net_init ip_vs_control_net_cleanup_sysctl(struct net *net)
+void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -3692,7 +3754,7 @@ void __net_init ip_vs_control_net_cleanup_sysctl(struct net *net)
 #else
 
 int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
-void __net_init ip_vs_control_net_cleanup_sysctl(struct net *net) { }
+void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
 
 #endif
 
@@ -3750,21 +3812,10 @@ void __net_exit ip_vs_control_net_cleanup(struct net *net)
 	free_percpu(ipvs->tot_stats.cpustats);
 }
 
-int __init ip_vs_control_init(void)
+int __init ip_vs_register_nl_ioctl(void)
 {
-	int idx;
 	int ret;
 
-	EnterFunction(2);
-
-	/* Initialize svc_table, ip_vs_svc_fwm_table, rs_table */
-	for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++)  {
-		INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
-		INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
-	}
-
-	smp_wmb();	/* Do we really need it now ? */
-
 	ret = nf_register_sockopt(&ip_vs_sockopts);
 	if (ret) {
 		pr_err("cannot register sockopt.\n");
@@ -3776,28 +3827,47 @@ int __init ip_vs_control_init(void)
 		pr_err("cannot register Generic Netlink interface.\n");
 		goto err_genl;
 	}
-
-	ret = register_netdevice_notifier(&ip_vs_dst_notifier);
-	if (ret < 0)
-		goto err_notf;
-
-	LeaveFunction(2);
 	return 0;
 
-err_notf:
-	ip_vs_genl_unregister();
 err_genl:
 	nf_unregister_sockopt(&ip_vs_sockopts);
 err_sock:
 	return ret;
 }
 
+void ip_vs_unregister_nl_ioctl(void)
+{
+	ip_vs_genl_unregister();
+	nf_unregister_sockopt(&ip_vs_sockopts);
+}
+
+int __init ip_vs_control_init(void)
+{
+	int idx;
+	int ret;
+
+	EnterFunction(2);
+
+	/* Initialize svc_table, ip_vs_svc_fwm_table, rs_table */
+	for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
+		INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
+		INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
+	}
+
+	smp_wmb();	/* Do we really need it now ? */
+
+	ret = register_netdevice_notifier(&ip_vs_dst_notifier);
+	if (ret < 0)
+		return ret;
+
+	LeaveFunction(2);
+	return 0;
+}
+
 
 void ip_vs_control_cleanup(void)
 {
 	EnterFunction(2);
 	unregister_netdevice_notifier(&ip_vs_dst_notifier);
-	ip_vs_genl_unregister();
-	nf_unregister_sockopt(&ip_vs_sockopts);
 	LeaveFunction(2);
 }
diff --git a/net/netfilter/ipvs/ip_vs_dh.c b/net/netfilter/ipvs/ip_vs_dh.c
index 1c269e56200a..8b7dca9ea422 100644
--- a/net/netfilter/ipvs/ip_vs_dh.c
+++ b/net/netfilter/ipvs/ip_vs_dh.c
@@ -68,7 +68,7 @@ struct ip_vs_dh_bucket {
 /*
  *	Returns hash value for IPVS DH entry
  */
-static inline unsigned ip_vs_dh_hashkey(int af, const union nf_inet_addr *addr)
+static inline unsigned int ip_vs_dh_hashkey(int af, const union nf_inet_addr *addr)
 {
 	__be32 addr_fold = addr->ip;
 
@@ -149,7 +149,7 @@ static int ip_vs_dh_init_svc(struct ip_vs_service *svc)
 
 	/* allocate the DH table for this service */
 	tbl = kmalloc(sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE,
-		      GFP_ATOMIC);
+		      GFP_KERNEL);
 	if (tbl == NULL)
 		return -ENOMEM;
 
diff --git a/net/netfilter/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c
index 538d74ee4f68..b20b29c903ef 100644
--- a/net/netfilter/ipvs/ip_vs_ftp.c
+++ b/net/netfilter/ipvs/ip_vs_ftp.c
@@ -177,7 +177,7 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp,
 	__be16 port;
 	struct ip_vs_conn *n_cp;
 	char buf[24];		/* xxx.xxx.xxx.xxx,ppp,ppp\000 */
-	unsigned buf_len;
+	unsigned int buf_len;
 	int ret = 0;
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct;
@@ -439,6 +439,8 @@ static int __net_init __ip_vs_ftp_init(struct net *net)
 	struct ip_vs_app *app;
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
+	if (!ipvs)
+		return -ENOENT;
 	app = kmemdup(&ip_vs_ftp, sizeof(struct ip_vs_app), GFP_KERNEL);
 	if (!app)
 		return -ENOMEM;
@@ -483,7 +485,7 @@ static struct pernet_operations ip_vs_ftp_ops = {
 	.exit = __ip_vs_ftp_exit,
 };
 
-int __init ip_vs_ftp_init(void)
+static int __init ip_vs_ftp_init(void)
 {
 	int rv;
 
diff --git a/net/netfilter/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
index 0f16283fd058..df646ccf08a7 100644
--- a/net/netfilter/ipvs/ip_vs_lblc.c
+++ b/net/netfilter/ipvs/ip_vs_lblc.c
@@ -142,7 +142,7 @@ static inline void ip_vs_lblc_free(struct ip_vs_lblc_entry *en)
 /*
  *	Returns hash value for IPVS LBLC entry
  */
-static inline unsigned
+static inline unsigned int
 ip_vs_lblc_hashkey(int af, const union nf_inet_addr *addr)
 {
 	__be32 addr_fold = addr->ip;
@@ -163,7 +163,7 @@ ip_vs_lblc_hashkey(int af, const union nf_inet_addr *addr)
 static void
 ip_vs_lblc_hash(struct ip_vs_lblc_table *tbl, struct ip_vs_lblc_entry *en)
 {
-	unsigned hash = ip_vs_lblc_hashkey(en->af, &en->addr);
+	unsigned int hash = ip_vs_lblc_hashkey(en->af, &en->addr);
 
 	list_add(&en->list, &tbl->bucket[hash]);
 	atomic_inc(&tbl->entries);
@@ -178,7 +178,7 @@ static inline struct ip_vs_lblc_entry *
 ip_vs_lblc_get(int af, struct ip_vs_lblc_table *tbl,
 	       const union nf_inet_addr *addr)
 {
-	unsigned hash = ip_vs_lblc_hashkey(af, addr);
+	unsigned int hash = ip_vs_lblc_hashkey(af, addr);
 	struct ip_vs_lblc_entry *en;
 
 	list_for_each_entry(en, &tbl->bucket[hash], list)
@@ -342,7 +342,7 @@ static int ip_vs_lblc_init_svc(struct ip_vs_service *svc)
 	/*
 	 *    Allocate the ip_vs_lblc_table for this service
 	 */
-	tbl = kmalloc(sizeof(*tbl), GFP_ATOMIC);
+	tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
 	if (tbl == NULL)
 		return -ENOMEM;
 
@@ -551,6 +551,9 @@ static int __net_init __ip_vs_lblc_init(struct net *net)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
+	if (!ipvs)
+		return -ENOENT;
+
 	if (!net_eq(net, &init_net)) {
 		ipvs->lblc_ctl_table = kmemdup(vs_vars_table,
 						sizeof(vs_vars_table),
@@ -563,8 +566,7 @@ static int __net_init __ip_vs_lblc_init(struct net *net)
 	ipvs->lblc_ctl_table[0].data = &ipvs->sysctl_lblc_expiration;
 
 	ipvs->lblc_ctl_header =
-		register_net_sysctl_table(net, net_vs_ctl_path,
-					  ipvs->lblc_ctl_table);
+		register_net_sysctl(net, "net/ipv4/vs", ipvs->lblc_ctl_table);
 	if (!ipvs->lblc_ctl_header) {
 		if (!net_eq(net, &init_net))
 			kfree(ipvs->lblc_ctl_table);
diff --git a/net/netfilter/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
index eec797f8cce7..570e31ea427a 100644
--- a/net/netfilter/ipvs/ip_vs_lblcr.c
+++ b/net/netfilter/ipvs/ip_vs_lblcr.c
@@ -311,7 +311,7 @@ static inline void ip_vs_lblcr_free(struct ip_vs_lblcr_entry *en)
 /*
  *	Returns hash value for IPVS LBLCR entry
  */
-static inline unsigned
+static inline unsigned int
 ip_vs_lblcr_hashkey(int af, const union nf_inet_addr *addr)
 {
 	__be32 addr_fold = addr->ip;
@@ -332,7 +332,7 @@ ip_vs_lblcr_hashkey(int af, const union nf_inet_addr *addr)
 static void
 ip_vs_lblcr_hash(struct ip_vs_lblcr_table *tbl, struct ip_vs_lblcr_entry *en)
 {
-	unsigned hash = ip_vs_lblcr_hashkey(en->af, &en->addr);
+	unsigned int hash = ip_vs_lblcr_hashkey(en->af, &en->addr);
 
 	list_add(&en->list, &tbl->bucket[hash]);
 	atomic_inc(&tbl->entries);
@@ -347,7 +347,7 @@ static inline struct ip_vs_lblcr_entry *
 ip_vs_lblcr_get(int af, struct ip_vs_lblcr_table *tbl,
 		const union nf_inet_addr *addr)
 {
-	unsigned hash = ip_vs_lblcr_hashkey(af, addr);
+	unsigned int hash = ip_vs_lblcr_hashkey(af, addr);
 	struct ip_vs_lblcr_entry *en;
 
 	list_for_each_entry(en, &tbl->bucket[hash], list)
@@ -511,7 +511,7 @@ static int ip_vs_lblcr_init_svc(struct ip_vs_service *svc)
 	/*
 	 *    Allocate the ip_vs_lblcr_table for this service
 	 */
-	tbl = kmalloc(sizeof(*tbl), GFP_ATOMIC);
+	tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
 	if (tbl == NULL)
 		return -ENOMEM;
 
@@ -745,6 +745,9 @@ static int __net_init __ip_vs_lblcr_init(struct net *net)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
+	if (!ipvs)
+		return -ENOENT;
+
 	if (!net_eq(net, &init_net)) {
 		ipvs->lblcr_ctl_table = kmemdup(vs_vars_table,
 						sizeof(vs_vars_table),
@@ -757,8 +760,7 @@ static int __net_init __ip_vs_lblcr_init(struct net *net)
 	ipvs->lblcr_ctl_table[0].data = &ipvs->sysctl_lblcr_expiration;
 
 	ipvs->lblcr_ctl_header =
-		register_net_sysctl_table(net, net_vs_ctl_path,
-					  ipvs->lblcr_ctl_table);
+		register_net_sysctl(net, "net/ipv4/vs", ipvs->lblcr_ctl_table);
 	if (!ipvs->lblcr_ctl_header) {
 		if (!net_eq(net, &init_net))
 			kfree(ipvs->lblcr_ctl_table);
diff --git a/net/netfilter/ipvs/ip_vs_proto.c b/net/netfilter/ipvs/ip_vs_proto.c
index f843a8833250..50d82186da87 100644
--- a/net/netfilter/ipvs/ip_vs_proto.c
+++ b/net/netfilter/ipvs/ip_vs_proto.c
@@ -48,7 +48,7 @@ static struct ip_vs_protocol *ip_vs_proto_table[IP_VS_PROTO_TAB_SIZE];
  */
 static int __used __init register_ip_vs_protocol(struct ip_vs_protocol *pp)
 {
-	unsigned hash = IP_VS_PROTO_HASH(pp->protocol);
+	unsigned int hash = IP_VS_PROTO_HASH(pp->protocol);
 
 	pp->next = ip_vs_proto_table[hash];
 	ip_vs_proto_table[hash] = pp;
@@ -59,9 +59,6 @@ static int __used __init register_ip_vs_protocol(struct ip_vs_protocol *pp)
 	return 0;
 }
 
-#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP) || \
-    defined(CONFIG_IP_VS_PROTO_SCTP) || defined(CONFIG_IP_VS_PROTO_AH) || \
-    defined(CONFIG_IP_VS_PROTO_ESP)
 /*
  *	register an ipvs protocols netns related data
  */
@@ -69,9 +66,9 @@ static int
 register_ip_vs_proto_netns(struct net *net, struct ip_vs_protocol *pp)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
-	unsigned hash = IP_VS_PROTO_HASH(pp->protocol);
+	unsigned int hash = IP_VS_PROTO_HASH(pp->protocol);
 	struct ip_vs_proto_data *pd =
-			kzalloc(sizeof(struct ip_vs_proto_data), GFP_ATOMIC);
+			kzalloc(sizeof(struct ip_vs_proto_data), GFP_KERNEL);
 
 	if (!pd)
 		return -ENOMEM;
@@ -81,12 +78,18 @@ register_ip_vs_proto_netns(struct net *net, struct ip_vs_protocol *pp)
 	ipvs->proto_data_table[hash] = pd;
 	atomic_set(&pd->appcnt, 0);	/* Init app counter */
 
-	if (pp->init_netns != NULL)
-		pp->init_netns(net, pd);
+	if (pp->init_netns != NULL) {
+		int ret = pp->init_netns(net, pd);
+		if (ret) {
+			/* unlink an free proto data */
+			ipvs->proto_data_table[hash] = pd->next;
+			kfree(pd);
+			return ret;
+		}
+	}
 
 	return 0;
 }
-#endif
 
 /*
  *	unregister an ipvs protocol
@@ -94,7 +97,7 @@ register_ip_vs_proto_netns(struct net *net, struct ip_vs_protocol *pp)
 static int unregister_ip_vs_protocol(struct ip_vs_protocol *pp)
 {
 	struct ip_vs_protocol **pp_p;
-	unsigned hash = IP_VS_PROTO_HASH(pp->protocol);
+	unsigned int hash = IP_VS_PROTO_HASH(pp->protocol);
 
 	pp_p = &ip_vs_proto_table[hash];
 	for (; *pp_p; pp_p = &(*pp_p)->next) {
@@ -117,7 +120,7 @@ unregister_ip_vs_proto_netns(struct net *net, struct ip_vs_proto_data *pd)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 	struct ip_vs_proto_data **pd_p;
-	unsigned hash = IP_VS_PROTO_HASH(pd->pp->protocol);
+	unsigned int hash = IP_VS_PROTO_HASH(pd->pp->protocol);
 
 	pd_p = &ipvs->proto_data_table[hash];
 	for (; *pd_p; pd_p = &(*pd_p)->next) {
@@ -139,7 +142,7 @@ unregister_ip_vs_proto_netns(struct net *net, struct ip_vs_proto_data *pd)
 struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto)
 {
 	struct ip_vs_protocol *pp;
-	unsigned hash = IP_VS_PROTO_HASH(proto);
+	unsigned int hash = IP_VS_PROTO_HASH(proto);
 
 	for (pp = ip_vs_proto_table[hash]; pp; pp = pp->next) {
 		if (pp->protocol == proto)
@@ -153,11 +156,11 @@ EXPORT_SYMBOL(ip_vs_proto_get);
 /*
  *	get ip_vs_protocol object data by netns and proto
  */
-struct ip_vs_proto_data *
+static struct ip_vs_proto_data *
 __ipvs_proto_data_get(struct netns_ipvs *ipvs, unsigned short proto)
 {
 	struct ip_vs_proto_data *pd;
-	unsigned hash = IP_VS_PROTO_HASH(proto);
+	unsigned int hash = IP_VS_PROTO_HASH(proto);
 
 	for (pd = ipvs->proto_data_table[hash]; pd; pd = pd->next) {
 		if (pd->pp->protocol == proto)
@@ -196,7 +199,7 @@ void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags)
 int *
 ip_vs_create_timeout_table(int *table, int size)
 {
-	return kmemdup(table, size, GFP_ATOMIC);
+	return kmemdup(table, size, GFP_KERNEL);
 }
 
 
@@ -316,22 +319,35 @@ ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
  */
 int __net_init ip_vs_protocol_net_init(struct net *net)
 {
+	int i, ret;
+	static struct ip_vs_protocol *protos[] = {
 #ifdef CONFIG_IP_VS_PROTO_TCP
-	register_ip_vs_proto_netns(net, &ip_vs_protocol_tcp);
+        &ip_vs_protocol_tcp,
 #endif
 #ifdef CONFIG_IP_VS_PROTO_UDP
-	register_ip_vs_proto_netns(net, &ip_vs_protocol_udp);
+	&ip_vs_protocol_udp,
 #endif
 #ifdef CONFIG_IP_VS_PROTO_SCTP
-	register_ip_vs_proto_netns(net, &ip_vs_protocol_sctp);
+	&ip_vs_protocol_sctp,
 #endif
 #ifdef CONFIG_IP_VS_PROTO_AH
-	register_ip_vs_proto_netns(net, &ip_vs_protocol_ah);
+	&ip_vs_protocol_ah,
 #endif
 #ifdef CONFIG_IP_VS_PROTO_ESP
-	register_ip_vs_proto_netns(net, &ip_vs_protocol_esp);
+	&ip_vs_protocol_esp,
 #endif
+	};
+
+	for (i = 0; i < ARRAY_SIZE(protos); i++) {
+		ret = register_ip_vs_proto_netns(net, protos[i]);
+		if (ret < 0)
+			goto cleanup;
+	}
 	return 0;
+
+cleanup:
+	ip_vs_protocol_net_cleanup(net);
+	return ret;
 }
 
 void __net_exit ip_vs_protocol_net_cleanup(struct net *net)
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index 1fbf7a2816f5..9f3fb751c491 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -1090,7 +1090,7 @@ out:
  *   timeouts is netns related now.
  * ---------------------------------------------
  */
-static void __ip_vs_sctp_init(struct net *net, struct ip_vs_proto_data *pd)
+static int __ip_vs_sctp_init(struct net *net, struct ip_vs_proto_data *pd)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -1098,6 +1098,9 @@ static void __ip_vs_sctp_init(struct net *net, struct ip_vs_proto_data *pd)
 	spin_lock_init(&ipvs->sctp_app_lock);
 	pd->timeout_table = ip_vs_create_timeout_table((int *)sctp_timeouts,
 							sizeof(sctp_timeouts));
+	if (!pd->timeout_table)
+		return -ENOMEM;
+	return 0;
 }
 
 static void __ip_vs_sctp_exit(struct net *net, struct ip_vs_proto_data *pd)
diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
index ef8641f7af83..cd609cc62721 100644
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -677,7 +677,7 @@ void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp)
  *   timeouts is netns related now.
  * ---------------------------------------------
  */
-static void __ip_vs_tcp_init(struct net *net, struct ip_vs_proto_data *pd)
+static int __ip_vs_tcp_init(struct net *net, struct ip_vs_proto_data *pd)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -685,7 +685,10 @@ static void __ip_vs_tcp_init(struct net *net, struct ip_vs_proto_data *pd)
 	spin_lock_init(&ipvs->tcp_app_lock);
 	pd->timeout_table = ip_vs_create_timeout_table((int *)tcp_timeouts,
 							sizeof(tcp_timeouts));
+	if (!pd->timeout_table)
+		return -ENOMEM;
 	pd->tcp_state_table =  tcp_states;
+	return 0;
 }
 
 static void __ip_vs_tcp_exit(struct net *net, struct ip_vs_proto_data *pd)
diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
index f4b7262896bb..2fedb2dcb3d1 100644
--- a/net/netfilter/ipvs/ip_vs_proto_udp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_udp.c
@@ -467,7 +467,7 @@ udp_state_transition(struct ip_vs_conn *cp, int direction,
 	cp->timeout = pd->timeout_table[IP_VS_UDP_S_NORMAL];
 }
 
-static void __udp_init(struct net *net, struct ip_vs_proto_data *pd)
+static int __udp_init(struct net *net, struct ip_vs_proto_data *pd)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
@@ -475,6 +475,9 @@ static void __udp_init(struct net *net, struct ip_vs_proto_data *pd)
 	spin_lock_init(&ipvs->udp_app_lock);
 	pd->timeout_table = ip_vs_create_timeout_table((int *)udp_timeouts,
 							sizeof(udp_timeouts));
+	if (!pd->timeout_table)
+		return -ENOMEM;
+	return 0;
 }
 
 static void __udp_exit(struct net *net, struct ip_vs_proto_data *pd)
diff --git a/net/netfilter/ipvs/ip_vs_sh.c b/net/netfilter/ipvs/ip_vs_sh.c
index 069e8d4d5c01..05126521743e 100644
--- a/net/netfilter/ipvs/ip_vs_sh.c
+++ b/net/netfilter/ipvs/ip_vs_sh.c
@@ -70,7 +70,7 @@ struct ip_vs_sh_bucket {
 /*
  *	Returns hash value for IPVS SH entry
  */
-static inline unsigned ip_vs_sh_hashkey(int af, const union nf_inet_addr *addr)
+static inline unsigned int ip_vs_sh_hashkey(int af, const union nf_inet_addr *addr)
 {
 	__be32 addr_fold = addr->ip;
 
@@ -162,7 +162,7 @@ static int ip_vs_sh_init_svc(struct ip_vs_service *svc)
 
 	/* allocate the SH table for this service */
 	tbl = kmalloc(sizeof(struct ip_vs_sh_bucket)*IP_VS_SH_TAB_SIZE,
-		      GFP_ATOMIC);
+		      GFP_KERNEL);
 	if (tbl == NULL)
 		return -ENOMEM;
 
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 8a0d6d6889f0..effa10c9e4e3 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -196,6 +196,7 @@ struct ip_vs_sync_thread_data {
 	struct net *net;
 	struct socket *sock;
 	char *buf;
+	int id;
 };
 
 /* Version 0 definition of packet sizes */
@@ -271,13 +272,6 @@ struct ip_vs_sync_buff {
 	unsigned char           *end;
 };
 
-/* multicast addr */
-static struct sockaddr_in mcast_addr = {
-	.sin_family		= AF_INET,
-	.sin_port		= cpu_to_be16(IP_VS_SYNC_PORT),
-	.sin_addr.s_addr	= cpu_to_be32(IP_VS_SYNC_GROUP),
-};
-
 /*
  * Copy of struct ip_vs_seq
  * From unaligned network order to aligned host order
@@ -300,18 +294,22 @@ static void hton_seq(struct ip_vs_seq *ho, struct ip_vs_seq *no)
 	put_unaligned_be32(ho->previous_delta, &no->previous_delta);
 }
 
-static inline struct ip_vs_sync_buff *sb_dequeue(struct netns_ipvs *ipvs)
+static inline struct ip_vs_sync_buff *
+sb_dequeue(struct netns_ipvs *ipvs, struct ipvs_master_sync_state *ms)
 {
 	struct ip_vs_sync_buff *sb;
 
 	spin_lock_bh(&ipvs->sync_lock);
-	if (list_empty(&ipvs->sync_queue)) {
+	if (list_empty(&ms->sync_queue)) {
 		sb = NULL;
+		__set_current_state(TASK_INTERRUPTIBLE);
 	} else {
-		sb = list_entry(ipvs->sync_queue.next,
-				struct ip_vs_sync_buff,
+		sb = list_entry(ms->sync_queue.next, struct ip_vs_sync_buff,
 				list);
 		list_del(&sb->list);
+		ms->sync_queue_len--;
+		if (!ms->sync_queue_len)
+			ms->sync_queue_delay = 0;
 	}
 	spin_unlock_bh(&ipvs->sync_lock);
 
@@ -334,7 +332,7 @@ ip_vs_sync_buff_create(struct netns_ipvs *ipvs)
 		kfree(sb);
 		return NULL;
 	}
-	sb->mesg->reserved = 0;  /* old nr_conns i.e. must be zeo now */
+	sb->mesg->reserved = 0;  /* old nr_conns i.e. must be zero now */
 	sb->mesg->version = SYNC_PROTO_VER;
 	sb->mesg->syncid = ipvs->master_syncid;
 	sb->mesg->size = sizeof(struct ip_vs_sync_mesg);
@@ -353,14 +351,22 @@ static inline void ip_vs_sync_buff_release(struct ip_vs_sync_buff *sb)
 	kfree(sb);
 }
 
-static inline void sb_queue_tail(struct netns_ipvs *ipvs)
+static inline void sb_queue_tail(struct netns_ipvs *ipvs,
+				 struct ipvs_master_sync_state *ms)
 {
-	struct ip_vs_sync_buff *sb = ipvs->sync_buff;
+	struct ip_vs_sync_buff *sb = ms->sync_buff;
 
 	spin_lock(&ipvs->sync_lock);
-	if (ipvs->sync_state & IP_VS_STATE_MASTER)
-		list_add_tail(&sb->list, &ipvs->sync_queue);
-	else
+	if (ipvs->sync_state & IP_VS_STATE_MASTER &&
+	    ms->sync_queue_len < sysctl_sync_qlen_max(ipvs)) {
+		if (!ms->sync_queue_len)
+			schedule_delayed_work(&ms->master_wakeup_work,
+					      max(IPVS_SYNC_SEND_DELAY, 1));
+		ms->sync_queue_len++;
+		list_add_tail(&sb->list, &ms->sync_queue);
+		if ((++ms->sync_queue_delay) == IPVS_SYNC_WAKEUP_RATE)
+			wake_up_process(ms->master_thread);
+	} else
 		ip_vs_sync_buff_release(sb);
 	spin_unlock(&ipvs->sync_lock);
 }
@@ -370,49 +376,26 @@ static inline void sb_queue_tail(struct netns_ipvs *ipvs)
  *	than the specified time or the specified time is zero.
  */
 static inline struct ip_vs_sync_buff *
-get_curr_sync_buff(struct netns_ipvs *ipvs, unsigned long time)
+get_curr_sync_buff(struct netns_ipvs *ipvs, struct ipvs_master_sync_state *ms,
+		   unsigned long time)
 {
 	struct ip_vs_sync_buff *sb;
 
 	spin_lock_bh(&ipvs->sync_buff_lock);
-	if (ipvs->sync_buff &&
-	    time_after_eq(jiffies - ipvs->sync_buff->firstuse, time)) {
-		sb = ipvs->sync_buff;
-		ipvs->sync_buff = NULL;
+	sb = ms->sync_buff;
+	if (sb && time_after_eq(jiffies - sb->firstuse, time)) {
+		ms->sync_buff = NULL;
+		__set_current_state(TASK_RUNNING);
 	} else
 		sb = NULL;
 	spin_unlock_bh(&ipvs->sync_buff_lock);
 	return sb;
 }
 
-/*
- * Switch mode from sending version 0 or 1
- *  - must handle sync_buf
- */
-void ip_vs_sync_switch_mode(struct net *net, int mode)
+static inline int
+select_master_thread_id(struct netns_ipvs *ipvs, struct ip_vs_conn *cp)
 {
-	struct netns_ipvs *ipvs = net_ipvs(net);
-
-	if (!(ipvs->sync_state & IP_VS_STATE_MASTER))
-		return;
-	if (mode == sysctl_sync_ver(ipvs) || !ipvs->sync_buff)
-		return;
-
-	spin_lock_bh(&ipvs->sync_buff_lock);
-	/* Buffer empty ? then let buf_create do the job  */
-	if (ipvs->sync_buff->mesg->size <=  sizeof(struct ip_vs_sync_mesg)) {
-		kfree(ipvs->sync_buff);
-		ipvs->sync_buff = NULL;
-	} else {
-		spin_lock_bh(&ipvs->sync_lock);
-		if (ipvs->sync_state & IP_VS_STATE_MASTER)
-			list_add_tail(&ipvs->sync_buff->list,
-				      &ipvs->sync_queue);
-		else
-			ip_vs_sync_buff_release(ipvs->sync_buff);
-		spin_unlock_bh(&ipvs->sync_lock);
-	}
-	spin_unlock_bh(&ipvs->sync_buff_lock);
+	return ((long) cp >> (1 + ilog2(sizeof(*cp)))) & ipvs->threads_mask;
 }
 
 /*
@@ -442,15 +425,101 @@ ip_vs_sync_buff_create_v0(struct netns_ipvs *ipvs)
 	return sb;
 }
 
+/* Check if conn should be synced.
+ * pkts: conn packets, use sysctl_sync_threshold to avoid packet check
+ * - (1) sync_refresh_period: reduce sync rate. Additionally, retry
+ *	sync_retries times with period of sync_refresh_period/8
+ * - (2) if both sync_refresh_period and sync_period are 0 send sync only
+ *	for state changes or only once when pkts matches sync_threshold
+ * - (3) templates: rate can be reduced only with sync_refresh_period or
+ *	with (2)
+ */
+static int ip_vs_sync_conn_needed(struct netns_ipvs *ipvs,
+				  struct ip_vs_conn *cp, int pkts)
+{
+	unsigned long orig = ACCESS_ONCE(cp->sync_endtime);
+	unsigned long now = jiffies;
+	unsigned long n = (now + cp->timeout) & ~3UL;
+	unsigned int sync_refresh_period;
+	int sync_period;
+	int force;
+
+	/* Check if we sync in current state */
+	if (unlikely(cp->flags & IP_VS_CONN_F_TEMPLATE))
+		force = 0;
+	else if (likely(cp->protocol == IPPROTO_TCP)) {
+		if (!((1 << cp->state) &
+		      ((1 << IP_VS_TCP_S_ESTABLISHED) |
+		       (1 << IP_VS_TCP_S_FIN_WAIT) |
+		       (1 << IP_VS_TCP_S_CLOSE) |
+		       (1 << IP_VS_TCP_S_CLOSE_WAIT) |
+		       (1 << IP_VS_TCP_S_TIME_WAIT))))
+			return 0;
+		force = cp->state != cp->old_state;
+		if (force && cp->state != IP_VS_TCP_S_ESTABLISHED)
+			goto set;
+	} else if (unlikely(cp->protocol == IPPROTO_SCTP)) {
+		if (!((1 << cp->state) &
+		      ((1 << IP_VS_SCTP_S_ESTABLISHED) |
+		       (1 << IP_VS_SCTP_S_CLOSED) |
+		       (1 << IP_VS_SCTP_S_SHUT_ACK_CLI) |
+		       (1 << IP_VS_SCTP_S_SHUT_ACK_SER))))
+			return 0;
+		force = cp->state != cp->old_state;
+		if (force && cp->state != IP_VS_SCTP_S_ESTABLISHED)
+			goto set;
+	} else {
+		/* UDP or another protocol with single state */
+		force = 0;
+	}
+
+	sync_refresh_period = sysctl_sync_refresh_period(ipvs);
+	if (sync_refresh_period > 0) {
+		long diff = n - orig;
+		long min_diff = max(cp->timeout >> 1, 10UL * HZ);
+
+		/* Avoid sync if difference is below sync_refresh_period
+		 * and below the half timeout.
+		 */
+		if (abs(diff) < min_t(long, sync_refresh_period, min_diff)) {
+			int retries = orig & 3;
+
+			if (retries >= sysctl_sync_retries(ipvs))
+				return 0;
+			if (time_before(now, orig - cp->timeout +
+					(sync_refresh_period >> 3)))
+				return 0;
+			n |= retries + 1;
+		}
+	}
+	sync_period = sysctl_sync_period(ipvs);
+	if (sync_period > 0) {
+		if (!(cp->flags & IP_VS_CONN_F_TEMPLATE) &&
+		    pkts % sync_period != sysctl_sync_threshold(ipvs))
+			return 0;
+	} else if (sync_refresh_period <= 0 &&
+		   pkts != sysctl_sync_threshold(ipvs))
+		return 0;
+
+set:
+	cp->old_state = cp->state;
+	n = cmpxchg(&cp->sync_endtime, orig, n);
+	return n == orig || force;
+}
+
 /*
  *      Version 0 , could be switched in by sys_ctl.
  *      Add an ip_vs_conn information into the current sync_buff.
  */
-void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp)
+static void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp,
+			       int pkts)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 	struct ip_vs_sync_mesg_v0 *m;
 	struct ip_vs_sync_conn_v0 *s;
+	struct ip_vs_sync_buff *buff;
+	struct ipvs_master_sync_state *ms;
+	int id;
 	int len;
 
 	if (unlikely(cp->af != AF_INET))
@@ -459,21 +528,41 @@ void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp)
 	if (cp->flags & IP_VS_CONN_F_ONE_PACKET)
 		return;
 
+	if (!ip_vs_sync_conn_needed(ipvs, cp, pkts))
+		return;
+
 	spin_lock(&ipvs->sync_buff_lock);
-	if (!ipvs->sync_buff) {
-		ipvs->sync_buff =
-			ip_vs_sync_buff_create_v0(ipvs);
-		if (!ipvs->sync_buff) {
+	if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) {
+		spin_unlock(&ipvs->sync_buff_lock);
+		return;
+	}
+
+	id = select_master_thread_id(ipvs, cp);
+	ms = &ipvs->ms[id];
+	buff = ms->sync_buff;
+	if (buff) {
+		m = (struct ip_vs_sync_mesg_v0 *) buff->mesg;
+		/* Send buffer if it is for v1 */
+		if (!m->nr_conns) {
+			sb_queue_tail(ipvs, ms);
+			ms->sync_buff = NULL;
+			buff = NULL;
+		}
+	}
+	if (!buff) {
+		buff = ip_vs_sync_buff_create_v0(ipvs);
+		if (!buff) {
 			spin_unlock(&ipvs->sync_buff_lock);
 			pr_err("ip_vs_sync_buff_create failed.\n");
 			return;
 		}
+		ms->sync_buff = buff;
 	}
 
 	len = (cp->flags & IP_VS_CONN_F_SEQ_MASK) ? FULL_CONN_SIZE :
 		SIMPLE_CONN_SIZE;
-	m = (struct ip_vs_sync_mesg_v0 *)ipvs->sync_buff->mesg;
-	s = (struct ip_vs_sync_conn_v0 *)ipvs->sync_buff->head;
+	m = (struct ip_vs_sync_mesg_v0 *) buff->mesg;
+	s = (struct ip_vs_sync_conn_v0 *) buff->head;
 
 	/* copy members */
 	s->reserved = 0;
@@ -494,18 +583,24 @@ void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp)
 
 	m->nr_conns++;
 	m->size += len;
-	ipvs->sync_buff->head += len;
+	buff->head += len;
 
 	/* check if there is a space for next one */
-	if (ipvs->sync_buff->head + FULL_CONN_SIZE > ipvs->sync_buff->end) {
-		sb_queue_tail(ipvs);
-		ipvs->sync_buff = NULL;
+	if (buff->head + FULL_CONN_SIZE > buff->end) {
+		sb_queue_tail(ipvs, ms);
+		ms->sync_buff = NULL;
 	}
 	spin_unlock(&ipvs->sync_buff_lock);
 
 	/* synchronize its controller if it has */
-	if (cp->control)
-		ip_vs_sync_conn(net, cp->control);
+	cp = cp->control;
+	if (cp) {
+		if (cp->flags & IP_VS_CONN_F_TEMPLATE)
+			pkts = atomic_add_return(1, &cp->in_pkts);
+		else
+			pkts = sysctl_sync_threshold(ipvs);
+		ip_vs_sync_conn(net, cp->control, pkts);
+	}
 }
 
 /*
@@ -513,23 +608,29 @@ void ip_vs_sync_conn_v0(struct net *net, struct ip_vs_conn *cp)
  *      Called by ip_vs_in.
  *      Sending Version 1 messages
  */
-void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp)
+void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 	struct ip_vs_sync_mesg *m;
 	union ip_vs_sync_conn *s;
+	struct ip_vs_sync_buff *buff;
+	struct ipvs_master_sync_state *ms;
+	int id;
 	__u8 *p;
 	unsigned int len, pe_name_len, pad;
 
 	/* Handle old version of the protocol */
 	if (sysctl_sync_ver(ipvs) == 0) {
-		ip_vs_sync_conn_v0(net, cp);
+		ip_vs_sync_conn_v0(net, cp, pkts);
 		return;
 	}
 	/* Do not sync ONE PACKET */
 	if (cp->flags & IP_VS_CONN_F_ONE_PACKET)
 		goto control;
 sloop:
+	if (!ip_vs_sync_conn_needed(ipvs, cp, pkts))
+		goto control;
+
 	/* Sanity checks */
 	pe_name_len = 0;
 	if (cp->pe_data_len) {
@@ -541,6 +642,13 @@ sloop:
 	}
 
 	spin_lock(&ipvs->sync_buff_lock);
+	if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) {
+		spin_unlock(&ipvs->sync_buff_lock);
+		return;
+	}
+
+	id = select_master_thread_id(ipvs, cp);
+	ms = &ipvs->ms[id];
 
 #ifdef CONFIG_IP_VS_IPV6
 	if (cp->af == AF_INET6)
@@ -559,27 +667,32 @@ sloop:
 
 	/* check if there is a space for this one  */
 	pad = 0;
-	if (ipvs->sync_buff) {
-		pad = (4 - (size_t)ipvs->sync_buff->head) & 3;
-		if (ipvs->sync_buff->head + len + pad > ipvs->sync_buff->end) {
-			sb_queue_tail(ipvs);
-			ipvs->sync_buff = NULL;
+	buff = ms->sync_buff;
+	if (buff) {
+		m = buff->mesg;
+		pad = (4 - (size_t) buff->head) & 3;
+		/* Send buffer if it is for v0 */
+		if (buff->head + len + pad > buff->end || m->reserved) {
+			sb_queue_tail(ipvs, ms);
+			ms->sync_buff = NULL;
+			buff = NULL;
 			pad = 0;
 		}
 	}
 
-	if (!ipvs->sync_buff) {
-		ipvs->sync_buff = ip_vs_sync_buff_create(ipvs);
-		if (!ipvs->sync_buff) {
+	if (!buff) {
+		buff = ip_vs_sync_buff_create(ipvs);
+		if (!buff) {
 			spin_unlock(&ipvs->sync_buff_lock);
 			pr_err("ip_vs_sync_buff_create failed.\n");
 			return;
 		}
+		ms->sync_buff = buff;
+		m = buff->mesg;
 	}
 
-	m = ipvs->sync_buff->mesg;
-	p = ipvs->sync_buff->head;
-	ipvs->sync_buff->head += pad + len;
+	p = buff->head;
+	buff->head += pad + len;
 	m->size += pad + len;
 	/* Add ev. padding from prev. sync_conn */
 	while (pad--)
@@ -644,16 +757,10 @@ control:
 	cp = cp->control;
 	if (!cp)
 		return;
-	/*
-	 * Reduce sync rate for templates
-	 * i.e only increment in_pkts for Templates.
-	 */
-	if (cp->flags & IP_VS_CONN_F_TEMPLATE) {
-		int pkts = atomic_add_return(1, &cp->in_pkts);
-
-		if (pkts % sysctl_sync_period(ipvs) != 1)
-			return;
-	}
+	if (cp->flags & IP_VS_CONN_F_TEMPLATE)
+		pkts = atomic_add_return(1, &cp->in_pkts);
+	else
+		pkts = sysctl_sync_threshold(ipvs);
 	goto sloop;
 }
 
@@ -731,9 +838,32 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
 	else
 		cp = ip_vs_ct_in_get(param);
 
-	if (cp && param->pe_data) 	/* Free pe_data */
+	if (cp) {
+		/* Free pe_data */
 		kfree(param->pe_data);
-	if (!cp) {
+
+		dest = cp->dest;
+		spin_lock(&cp->lock);
+		if ((cp->flags ^ flags) & IP_VS_CONN_F_INACTIVE &&
+		    !(flags & IP_VS_CONN_F_TEMPLATE) && dest) {
+			if (flags & IP_VS_CONN_F_INACTIVE) {
+				atomic_dec(&dest->activeconns);
+				atomic_inc(&dest->inactconns);
+			} else {
+				atomic_inc(&dest->activeconns);
+				atomic_dec(&dest->inactconns);
+			}
+		}
+		flags &= IP_VS_CONN_F_BACKUP_UPD_MASK;
+		flags |= cp->flags & ~IP_VS_CONN_F_BACKUP_UPD_MASK;
+		cp->flags = flags;
+		spin_unlock(&cp->lock);
+		if (!dest) {
+			dest = ip_vs_try_bind_dest(cp);
+			if (dest)
+				atomic_dec(&dest->refcnt);
+		}
+	} else {
 		/*
 		 * Find the appropriate destination for the connection.
 		 * If it is not found the connection will remain unbound
@@ -742,18 +872,6 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
 		dest = ip_vs_find_dest(net, type, daddr, dport, param->vaddr,
 				       param->vport, protocol, fwmark, flags);
 
-		/*  Set the approprite ativity flag */
-		if (protocol == IPPROTO_TCP) {
-			if (state != IP_VS_TCP_S_ESTABLISHED)
-				flags |= IP_VS_CONN_F_INACTIVE;
-			else
-				flags &= ~IP_VS_CONN_F_INACTIVE;
-		} else if (protocol == IPPROTO_SCTP) {
-			if (state != IP_VS_SCTP_S_ESTABLISHED)
-				flags |= IP_VS_CONN_F_INACTIVE;
-			else
-				flags &= ~IP_VS_CONN_F_INACTIVE;
-		}
 		cp = ip_vs_conn_new(param, daddr, dport, flags, dest, fwmark);
 		if (dest)
 			atomic_dec(&dest->refcnt);
@@ -763,34 +881,6 @@ static void ip_vs_proc_conn(struct net *net, struct ip_vs_conn_param *param,
 			IP_VS_DBG(2, "BACKUP, add new conn. failed\n");
 			return;
 		}
-	} else if (!cp->dest) {
-		dest = ip_vs_try_bind_dest(cp);
-		if (dest)
-			atomic_dec(&dest->refcnt);
-	} else if ((cp->dest) && (cp->protocol == IPPROTO_TCP) &&
-		(cp->state != state)) {
-		/* update active/inactive flag for the connection */
-		dest = cp->dest;
-		if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
-			(state != IP_VS_TCP_S_ESTABLISHED)) {
-			atomic_dec(&dest->activeconns);
-			atomic_inc(&dest->inactconns);
-			cp->flags |= IP_VS_CONN_F_INACTIVE;
-		} else if ((cp->flags & IP_VS_CONN_F_INACTIVE) &&
-			(state == IP_VS_TCP_S_ESTABLISHED)) {
-			atomic_inc(&dest->activeconns);
-			atomic_dec(&dest->inactconns);
-			cp->flags &= ~IP_VS_CONN_F_INACTIVE;
-		}
-	} else if ((cp->dest) && (cp->protocol == IPPROTO_SCTP) &&
-		(cp->state != state)) {
-		dest = cp->dest;
-		if (!(cp->flags & IP_VS_CONN_F_INACTIVE) &&
-		(state != IP_VS_SCTP_S_ESTABLISHED)) {
-			atomic_dec(&dest->activeconns);
-			atomic_inc(&dest->inactconns);
-			cp->flags &= ~IP_VS_CONN_F_INACTIVE;
-		}
 	}
 
 	if (opt)
@@ -839,7 +929,7 @@ static void ip_vs_process_message_v0(struct net *net, const char *buffer,
 
 	p = (char *)buffer + sizeof(struct ip_vs_sync_mesg_v0);
 	for (i=0; i<m->nr_conns; i++) {
-		unsigned flags, state;
+		unsigned int flags, state;
 
 		if (p + SIMPLE_CONN_SIZE > buffer+buflen) {
 			IP_VS_ERR_RL("BACKUP v0, bogus conn\n");
@@ -1109,7 +1199,7 @@ static void ip_vs_process_message(struct net *net, __u8 *buffer,
 
 		for (i=0; i<nr_conns; i++) {
 			union ip_vs_sync_conn *s;
-			unsigned size;
+			unsigned int size;
 			int retc;
 
 			p = msg_end;
@@ -1149,6 +1239,28 @@ static void ip_vs_process_message(struct net *net, __u8 *buffer,
 
 
 /*
+ *      Setup sndbuf (mode=1) or rcvbuf (mode=0)
+ */
+static void set_sock_size(struct sock *sk, int mode, int val)
+{
+	/* setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &val, sizeof(val)); */
+	/* setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)); */
+	lock_sock(sk);
+	if (mode) {
+		val = clamp_t(int, val, (SOCK_MIN_SNDBUF + 1) / 2,
+			      sysctl_wmem_max);
+		sk->sk_sndbuf = val * 2;
+		sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
+	} else {
+		val = clamp_t(int, val, (SOCK_MIN_RCVBUF + 1) / 2,
+			      sysctl_rmem_max);
+		sk->sk_rcvbuf = val * 2;
+		sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
+	}
+	release_sock(sk);
+}
+
+/*
  *      Setup loopback of outgoing multicasts on a sending socket
  */
 static void set_mcast_loop(struct sock *sk, u_char loop)
@@ -1298,9 +1410,15 @@ static int bind_mcastif_addr(struct socket *sock, char *ifname)
 /*
  *      Set up sending multicast socket over UDP
  */
-static struct socket *make_send_sock(struct net *net)
+static struct socket *make_send_sock(struct net *net, int id)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
+	/* multicast addr */
+	struct sockaddr_in mcast_addr = {
+		.sin_family		= AF_INET,
+		.sin_port		= cpu_to_be16(IP_VS_SYNC_PORT + id),
+		.sin_addr.s_addr	= cpu_to_be32(IP_VS_SYNC_GROUP),
+	};
 	struct socket *sock;
 	int result;
 
@@ -1324,6 +1442,9 @@ static struct socket *make_send_sock(struct net *net)
 
 	set_mcast_loop(sock->sk, 0);
 	set_mcast_ttl(sock->sk, 1);
+	result = sysctl_sync_sock_size(ipvs);
+	if (result > 0)
+		set_sock_size(sock->sk, 1, result);
 
 	result = bind_mcastif_addr(sock, ipvs->master_mcast_ifn);
 	if (result < 0) {
@@ -1349,9 +1470,15 @@ error:
 /*
  *      Set up receiving multicast socket over UDP
  */
-static struct socket *make_receive_sock(struct net *net)
+static struct socket *make_receive_sock(struct net *net, int id)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
+	/* multicast addr */
+	struct sockaddr_in mcast_addr = {
+		.sin_family		= AF_INET,
+		.sin_port		= cpu_to_be16(IP_VS_SYNC_PORT + id),
+		.sin_addr.s_addr	= cpu_to_be32(IP_VS_SYNC_GROUP),
+	};
 	struct socket *sock;
 	int result;
 
@@ -1368,7 +1495,10 @@ static struct socket *make_receive_sock(struct net *net)
 	 */
 	sk_change_net(sock->sk, net);
 	/* it is equivalent to the REUSEADDR option in user-space */
-	sock->sk->sk_reuse = 1;
+	sock->sk->sk_reuse = SK_CAN_REUSE;
+	result = sysctl_sync_sock_size(ipvs);
+	if (result > 0)
+		set_sock_size(sock->sk, 0, result);
 
 	result = sock->ops->bind(sock, (struct sockaddr *) &mcast_addr,
 			sizeof(struct sockaddr));
@@ -1411,18 +1541,22 @@ ip_vs_send_async(struct socket *sock, const char *buffer, const size_t length)
 	return len;
 }
 
-static void
+static int
 ip_vs_send_sync_msg(struct socket *sock, struct ip_vs_sync_mesg *msg)
 {
 	int msize;
+	int ret;
 
 	msize = msg->size;
 
 	/* Put size in network byte order */
 	msg->size = htons(msg->size);
 
-	if (ip_vs_send_async(sock, (char *)msg, msize) != msize)
-		pr_err("ip_vs_send_async error\n");
+	ret = ip_vs_send_async(sock, (char *)msg, msize);
+	if (ret >= 0 || ret == -EAGAIN)
+		return ret;
+	pr_err("ip_vs_send_async error %d\n", ret);
+	return 0;
 }
 
 static int
@@ -1438,48 +1572,90 @@ ip_vs_receive(struct socket *sock, char *buffer, const size_t buflen)
 	iov.iov_base     = buffer;
 	iov.iov_len      = (size_t)buflen;
 
-	len = kernel_recvmsg(sock, &msg, &iov, 1, buflen, 0);
+	len = kernel_recvmsg(sock, &msg, &iov, 1, buflen, MSG_DONTWAIT);
 
 	if (len < 0)
-		return -1;
+		return len;
 
 	LeaveFunction(7);
 	return len;
 }
 
+/* Wakeup the master thread for sending */
+static void master_wakeup_work_handler(struct work_struct *work)
+{
+	struct ipvs_master_sync_state *ms =
+		container_of(work, struct ipvs_master_sync_state,
+			     master_wakeup_work.work);
+	struct netns_ipvs *ipvs = ms->ipvs;
+
+	spin_lock_bh(&ipvs->sync_lock);
+	if (ms->sync_queue_len &&
+	    ms->sync_queue_delay < IPVS_SYNC_WAKEUP_RATE) {
+		ms->sync_queue_delay = IPVS_SYNC_WAKEUP_RATE;
+		wake_up_process(ms->master_thread);
+	}
+	spin_unlock_bh(&ipvs->sync_lock);
+}
+
+/* Get next buffer to send */
+static inline struct ip_vs_sync_buff *
+next_sync_buff(struct netns_ipvs *ipvs, struct ipvs_master_sync_state *ms)
+{
+	struct ip_vs_sync_buff *sb;
+
+	sb = sb_dequeue(ipvs, ms);
+	if (sb)
+		return sb;
+	/* Do not delay entries in buffer for more than 2 seconds */
+	return get_curr_sync_buff(ipvs, ms, IPVS_SYNC_FLUSH_TIME);
+}
 
 static int sync_thread_master(void *data)
 {
 	struct ip_vs_sync_thread_data *tinfo = data;
 	struct netns_ipvs *ipvs = net_ipvs(tinfo->net);
+	struct ipvs_master_sync_state *ms = &ipvs->ms[tinfo->id];
+	struct sock *sk = tinfo->sock->sk;
 	struct ip_vs_sync_buff *sb;
 
 	pr_info("sync thread started: state = MASTER, mcast_ifn = %s, "
-		"syncid = %d\n",
-		ipvs->master_mcast_ifn, ipvs->master_syncid);
+		"syncid = %d, id = %d\n",
+		ipvs->master_mcast_ifn, ipvs->master_syncid, tinfo->id);
 
-	while (!kthread_should_stop()) {
-		while ((sb = sb_dequeue(ipvs))) {
-			ip_vs_send_sync_msg(tinfo->sock, sb->mesg);
-			ip_vs_sync_buff_release(sb);
+	for (;;) {
+		sb = next_sync_buff(ipvs, ms);
+		if (unlikely(kthread_should_stop()))
+			break;
+		if (!sb) {
+			schedule_timeout(IPVS_SYNC_CHECK_PERIOD);
+			continue;
 		}
-
-		/* check if entries stay in ipvs->sync_buff for 2 seconds */
-		sb = get_curr_sync_buff(ipvs, 2 * HZ);
-		if (sb) {
-			ip_vs_send_sync_msg(tinfo->sock, sb->mesg);
-			ip_vs_sync_buff_release(sb);
+		while (ip_vs_send_sync_msg(tinfo->sock, sb->mesg) < 0) {
+			int ret = 0;
+
+			__wait_event_interruptible(*sk_sleep(sk),
+						   sock_writeable(sk) ||
+						   kthread_should_stop(),
+						   ret);
+			if (unlikely(kthread_should_stop()))
+				goto done;
 		}
-
-		schedule_timeout_interruptible(HZ);
+		ip_vs_sync_buff_release(sb);
 	}
 
+done:
+	__set_current_state(TASK_RUNNING);
+	if (sb)
+		ip_vs_sync_buff_release(sb);
+
 	/* clean up the sync_buff queue */
-	while ((sb = sb_dequeue(ipvs)))
+	while ((sb = sb_dequeue(ipvs, ms)))
 		ip_vs_sync_buff_release(sb);
+	__set_current_state(TASK_RUNNING);
 
 	/* clean up the current sync_buff */
-	sb = get_curr_sync_buff(ipvs, 0);
+	sb = get_curr_sync_buff(ipvs, ms, 0);
 	if (sb)
 		ip_vs_sync_buff_release(sb);
 
@@ -1498,8 +1674,8 @@ static int sync_thread_backup(void *data)
 	int len;
 
 	pr_info("sync thread started: state = BACKUP, mcast_ifn = %s, "
-		"syncid = %d\n",
-		ipvs->backup_mcast_ifn, ipvs->backup_syncid);
+		"syncid = %d, id = %d\n",
+		ipvs->backup_mcast_ifn, ipvs->backup_syncid, tinfo->id);
 
 	while (!kthread_should_stop()) {
 		wait_event_interruptible(*sk_sleep(tinfo->sock->sk),
@@ -1511,7 +1687,8 @@ static int sync_thread_backup(void *data)
 			len = ip_vs_receive(tinfo->sock, tinfo->buf,
 					ipvs->recv_mesg_maxlen);
 			if (len <= 0) {
-				pr_err("receiving message error\n");
+				if (len != -EAGAIN)
+					pr_err("receiving message error\n");
 				break;
 			}
 
@@ -1535,86 +1712,140 @@ static int sync_thread_backup(void *data)
 int start_sync_thread(struct net *net, int state, char *mcast_ifn, __u8 syncid)
 {
 	struct ip_vs_sync_thread_data *tinfo;
-	struct task_struct **realtask, *task;
+	struct task_struct **array = NULL, *task;
 	struct socket *sock;
 	struct netns_ipvs *ipvs = net_ipvs(net);
-	char *name, *buf = NULL;
+	char *name;
 	int (*threadfn)(void *data);
+	int id, count;
 	int result = -ENOMEM;
 
 	IP_VS_DBG(7, "%s(): pid %d\n", __func__, task_pid_nr(current));
 	IP_VS_DBG(7, "Each ip_vs_sync_conn entry needs %Zd bytes\n",
 		  sizeof(struct ip_vs_sync_conn_v0));
 
+	if (!ipvs->sync_state) {
+		count = clamp(sysctl_sync_ports(ipvs), 1, IPVS_SYNC_PORTS_MAX);
+		ipvs->threads_mask = count - 1;
+	} else
+		count = ipvs->threads_mask + 1;
 
 	if (state == IP_VS_STATE_MASTER) {
-		if (ipvs->master_thread)
+		if (ipvs->ms)
 			return -EEXIST;
 
 		strlcpy(ipvs->master_mcast_ifn, mcast_ifn,
 			sizeof(ipvs->master_mcast_ifn));
 		ipvs->master_syncid = syncid;
-		realtask = &ipvs->master_thread;
-		name = "ipvs_master:%d";
+		name = "ipvs-m:%d:%d";
 		threadfn = sync_thread_master;
-		sock = make_send_sock(net);
 	} else if (state == IP_VS_STATE_BACKUP) {
-		if (ipvs->backup_thread)
+		if (ipvs->backup_threads)
 			return -EEXIST;
 
 		strlcpy(ipvs->backup_mcast_ifn, mcast_ifn,
 			sizeof(ipvs->backup_mcast_ifn));
 		ipvs->backup_syncid = syncid;
-		realtask = &ipvs->backup_thread;
-		name = "ipvs_backup:%d";
+		name = "ipvs-b:%d:%d";
 		threadfn = sync_thread_backup;
-		sock = make_receive_sock(net);
 	} else {
 		return -EINVAL;
 	}
 
-	if (IS_ERR(sock)) {
-		result = PTR_ERR(sock);
-		goto out;
-	}
+	if (state == IP_VS_STATE_MASTER) {
+		struct ipvs_master_sync_state *ms;
 
-	set_sync_mesg_maxlen(net, state);
-	if (state == IP_VS_STATE_BACKUP) {
-		buf = kmalloc(ipvs->recv_mesg_maxlen, GFP_KERNEL);
-		if (!buf)
-			goto outsocket;
+		ipvs->ms = kzalloc(count * sizeof(ipvs->ms[0]), GFP_KERNEL);
+		if (!ipvs->ms)
+			goto out;
+		ms = ipvs->ms;
+		for (id = 0; id < count; id++, ms++) {
+			INIT_LIST_HEAD(&ms->sync_queue);
+			ms->sync_queue_len = 0;
+			ms->sync_queue_delay = 0;
+			INIT_DELAYED_WORK(&ms->master_wakeup_work,
+					  master_wakeup_work_handler);
+			ms->ipvs = ipvs;
+		}
+	} else {
+		array = kzalloc(count * sizeof(struct task_struct *),
+				GFP_KERNEL);
+		if (!array)
+			goto out;
 	}
+	set_sync_mesg_maxlen(net, state);
 
-	tinfo = kmalloc(sizeof(*tinfo), GFP_KERNEL);
-	if (!tinfo)
-		goto outbuf;
-
-	tinfo->net = net;
-	tinfo->sock = sock;
-	tinfo->buf = buf;
+	tinfo = NULL;
+	for (id = 0; id < count; id++) {
+		if (state == IP_VS_STATE_MASTER)
+			sock = make_send_sock(net, id);
+		else
+			sock = make_receive_sock(net, id);
+		if (IS_ERR(sock)) {
+			result = PTR_ERR(sock);
+			goto outtinfo;
+		}
+		tinfo = kmalloc(sizeof(*tinfo), GFP_KERNEL);
+		if (!tinfo)
+			goto outsocket;
+		tinfo->net = net;
+		tinfo->sock = sock;
+		if (state == IP_VS_STATE_BACKUP) {
+			tinfo->buf = kmalloc(ipvs->recv_mesg_maxlen,
+					     GFP_KERNEL);
+			if (!tinfo->buf)
+				goto outtinfo;
+		}
+		tinfo->id = id;
 
-	task = kthread_run(threadfn, tinfo, name, ipvs->gen);
-	if (IS_ERR(task)) {
-		result = PTR_ERR(task);
-		goto outtinfo;
+		task = kthread_run(threadfn, tinfo, name, ipvs->gen, id);
+		if (IS_ERR(task)) {
+			result = PTR_ERR(task);
+			goto outtinfo;
+		}
+		tinfo = NULL;
+		if (state == IP_VS_STATE_MASTER)
+			ipvs->ms[id].master_thread = task;
+		else
+			array[id] = task;
 	}
 
 	/* mark as active */
-	*realtask = task;
+
+	if (state == IP_VS_STATE_BACKUP)
+		ipvs->backup_threads = array;
+	spin_lock_bh(&ipvs->sync_buff_lock);
 	ipvs->sync_state |= state;
+	spin_unlock_bh(&ipvs->sync_buff_lock);
 
 	/* increase the module use count */
 	ip_vs_use_count_inc();
 
 	return 0;
 
-outtinfo:
-	kfree(tinfo);
-outbuf:
-	kfree(buf);
 outsocket:
 	sk_release_kernel(sock->sk);
+
+outtinfo:
+	if (tinfo) {
+		sk_release_kernel(tinfo->sock->sk);
+		kfree(tinfo->buf);
+		kfree(tinfo);
+	}
+	count = id;
+	while (count-- > 0) {
+		if (state == IP_VS_STATE_MASTER)
+			kthread_stop(ipvs->ms[count].master_thread);
+		else
+			kthread_stop(array[count]);
+	}
+	kfree(array);
+
 out:
+	if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) {
+		kfree(ipvs->ms);
+		ipvs->ms = NULL;
+	}
 	return result;
 }
 
@@ -1622,38 +1853,60 @@ out:
 int stop_sync_thread(struct net *net, int state)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
+	struct task_struct **array;
+	int id;
 	int retc = -EINVAL;
 
 	IP_VS_DBG(7, "%s(): pid %d\n", __func__, task_pid_nr(current));
 
 	if (state == IP_VS_STATE_MASTER) {
-		if (!ipvs->master_thread)
+		if (!ipvs->ms)
 			return -ESRCH;
 
-		pr_info("stopping master sync thread %d ...\n",
-			task_pid_nr(ipvs->master_thread));
-
 		/*
 		 * The lock synchronizes with sb_queue_tail(), so that we don't
 		 * add sync buffers to the queue, when we are already in
 		 * progress of stopping the master sync daemon.
 		 */
 
-		spin_lock_bh(&ipvs->sync_lock);
+		spin_lock_bh(&ipvs->sync_buff_lock);
+		spin_lock(&ipvs->sync_lock);
 		ipvs->sync_state &= ~IP_VS_STATE_MASTER;
-		spin_unlock_bh(&ipvs->sync_lock);
-		retc = kthread_stop(ipvs->master_thread);
-		ipvs->master_thread = NULL;
+		spin_unlock(&ipvs->sync_lock);
+		spin_unlock_bh(&ipvs->sync_buff_lock);
+
+		retc = 0;
+		for (id = ipvs->threads_mask; id >= 0; id--) {
+			struct ipvs_master_sync_state *ms = &ipvs->ms[id];
+			int ret;
+
+			pr_info("stopping master sync thread %d ...\n",
+				task_pid_nr(ms->master_thread));
+			cancel_delayed_work_sync(&ms->master_wakeup_work);
+			ret = kthread_stop(ms->master_thread);
+			if (retc >= 0)
+				retc = ret;
+		}
+		kfree(ipvs->ms);
+		ipvs->ms = NULL;
 	} else if (state == IP_VS_STATE_BACKUP) {
-		if (!ipvs->backup_thread)
+		if (!ipvs->backup_threads)
 			return -ESRCH;
 
-		pr_info("stopping backup sync thread %d ...\n",
-			task_pid_nr(ipvs->backup_thread));
-
 		ipvs->sync_state &= ~IP_VS_STATE_BACKUP;
-		retc = kthread_stop(ipvs->backup_thread);
-		ipvs->backup_thread = NULL;
+		array = ipvs->backup_threads;
+		retc = 0;
+		for (id = ipvs->threads_mask; id >= 0; id--) {
+			int ret;
+
+			pr_info("stopping backup sync thread %d ...\n",
+				task_pid_nr(array[id]));
+			ret = kthread_stop(array[id]);
+			if (retc >= 0)
+				retc = ret;
+		}
+		kfree(array);
+		ipvs->backup_threads = NULL;
 	}
 
 	/* decrease the module use count */
@@ -1670,13 +1923,8 @@ int __net_init ip_vs_sync_net_init(struct net *net)
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
 	__mutex_init(&ipvs->sync_mutex, "ipvs->sync_mutex", &__ipvs_sync_key);
-	INIT_LIST_HEAD(&ipvs->sync_queue);
 	spin_lock_init(&ipvs->sync_lock);
 	spin_lock_init(&ipvs->sync_buff_lock);
-
-	ipvs->sync_mcast_addr.sin_family = AF_INET;
-	ipvs->sync_mcast_addr.sin_port = cpu_to_be16(IP_VS_SYNC_PORT);
-	ipvs->sync_mcast_addr.sin_addr.s_addr = cpu_to_be32(IP_VS_SYNC_GROUP);
 	return 0;
 }
 
diff --git a/net/netfilter/ipvs/ip_vs_wrr.c b/net/netfilter/ipvs/ip_vs_wrr.c
index fd0d4e09876a..231be7dd547a 100644
--- a/net/netfilter/ipvs/ip_vs_wrr.c
+++ b/net/netfilter/ipvs/ip_vs_wrr.c
@@ -84,7 +84,7 @@ static int ip_vs_wrr_init_svc(struct ip_vs_service *svc)
 	/*
 	 *    Allocate the mark variable for WRR scheduling
 	 */
-	mark = kmalloc(sizeof(struct ip_vs_wrr_mark), GFP_ATOMIC);
+	mark = kmalloc(sizeof(struct ip_vs_wrr_mark), GFP_KERNEL);
 	if (mark == NULL)
 		return -ENOMEM;