IPVS: netns awareness to ip_vs_sync

All global variables moved to struct ipvs,
most external changes fixed (i.e. init_net removed)
in sync_buf create  + 4 replaced by sizeof(struct..)

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>

include/net/ip_vs.h

@@ -958,7 +958,7 @@ extern struct ip_vs_stats ip_vs_stats;
 extern const struct ctl_path net_vs_ctl_path[];
 extern int sysctl_ip_vs_sync_ver;
 
-extern void ip_vs_sync_switch_mode(int mode);
+extern void ip_vs_sync_switch_mode(struct net *net, int mode);
 extern struct ip_vs_service *
 ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol,
 		  const union nf_inet_addr *vaddr, __be16 vport);
@@ -987,14 +987,10 @@ extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
  *      IPVS sync daemon data and function prototypes
  *      (from ip_vs_sync.c)
  */
-extern volatile int ip_vs_sync_state;
-extern volatile int ip_vs_master_syncid;
-extern volatile int ip_vs_backup_syncid;
-extern char ip_vs_master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
-extern char ip_vs_backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
-extern int start_sync_thread(int state, char *mcast_ifn, __u8 syncid);
-extern int stop_sync_thread(int state);
-extern void ip_vs_sync_conn(struct ip_vs_conn *cp);
+extern int start_sync_thread(struct net *net, int state, char *mcast_ifn,
+			     __u8 syncid);
+extern int stop_sync_thread(struct net *net, int state);
+extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp);
 extern int ip_vs_sync_init(void);
 extern void ip_vs_sync_cleanup(void);
 

include/net/netns/ip_vs.h

@@ -74,6 +74,22 @@ struct netns_ipvs {
 	struct list_head	est_list;	/* estimator list */
 	spinlock_t		est_lock;
 	struct timer_list	est_timer;	/* Estimation timer */
+	/* ip_vs_sync */
+	struct list_head	sync_queue;
+	spinlock_t		sync_lock;
+	struct ip_vs_sync_buff  *sync_buff;
+	spinlock_t		sync_buff_lock;
+	struct sockaddr_in	sync_mcast_addr;
+	struct task_struct	*master_thread;
+	struct task_struct	*backup_thread;
+	int			send_mesg_maxlen;
+	int			recv_mesg_maxlen;
+	volatile int		sync_state;
+	volatile int		master_syncid;
+	volatile int		backup_syncid;
+	/* multicast interface name */
+	char			master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
+	char			backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
 };
 
 #endif /* IP_VS_H_ */

net/netfilter/ipvs/ip_vs_core.c

@@ -1471,12 +1471,13 @@ ip_vs_in_icmp_v6(struct sk_buff *skb, int *related, unsigned int hooknum)
 static unsigned int
 ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
 {
-	struct net *net = NULL;
+	struct net *net;
 	struct ip_vs_iphdr iph;
 	struct ip_vs_protocol *pp;
 	struct ip_vs_proto_data *pd;
 	struct ip_vs_conn *cp;
 	int ret, restart, pkts;
+	struct netns_ipvs *ipvs;
 
 	/* Already marked as IPVS request or reply? */
 	if (skb->ipvs_property)
@@ -1556,7 +1557,8 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
 	}
 
 	IP_VS_DBG_PKT(11, af, pp, skb, 0, "Incoming packet");
-
+	net = skb_net(skb);
+	ipvs = net_ipvs(net);
 	/* Check the server status */
 	if (cp->dest && !(cp->dest->flags & IP_VS_DEST_F_AVAILABLE)) {
 		/* the destination server is not available */
@@ -1589,12 +1591,13 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
 	 *
 	 * For ONE_PKT let ip_vs_sync_conn() do the filter work.
 	 */
+
 	if (cp->flags & IP_VS_CONN_F_ONE_PACKET)
 		pkts = sysctl_ip_vs_sync_threshold[0];
 	else
 		pkts = atomic_add_return(1, &cp->in_pkts);
 
-	if ((ip_vs_sync_state & IP_VS_STATE_MASTER) &&
+	if ((ipvs->sync_state & IP_VS_STATE_MASTER) &&
 	    cp->protocol == IPPROTO_SCTP) {
 		if ((cp->state == IP_VS_SCTP_S_ESTABLISHED &&
 			(pkts % sysctl_ip_vs_sync_threshold[1]
@@ -1603,13 +1606,13 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
 				 ((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(cp);
+			ip_vs_sync_conn(net, cp);
 			goto out;
 		}
 	}
 
 	/* Keep this block last: TCP and others with pp->num_states <= 1 */
-	else if ((ip_vs_sync_state & IP_VS_STATE_MASTER) &&
+	else if ((ipvs->sync_state & IP_VS_STATE_MASTER) &&
 	    (((cp->protocol != IPPROTO_TCP ||
 	       cp->state == IP_VS_TCP_S_ESTABLISHED) &&
 	      (pkts % sysctl_ip_vs_sync_threshold[1]
@@ -1619,7 +1622,7 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
 	       (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(cp);
+		ip_vs_sync_conn(net, cp);
 out:
 	cp->old_state = cp->state;
 

net/netfilter/ipvs/ip_vs_ctl.c

@@ -1559,7 +1559,8 @@ proc_do_sync_mode(ctl_table *table, int write,
 			/* Restore the correct value */
 			*valp = val;
 		} else {
-			ip_vs_sync_switch_mode(val);
+			struct net *net = current->nsproxy->net_ns;
+			ip_vs_sync_switch_mode(net, val);
 		}
 	}
 	return rc;
@@ -2174,11 +2175,12 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
 		goto out_unlock;
 	} else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
 		struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
-		ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
+		ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
+					dm->syncid);
 		goto out_unlock;
 	} else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
 		struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
-		ret = stop_sync_thread(dm->state);
+		ret = stop_sync_thread(net, dm->state);
 		goto out_unlock;
 	}
 
@@ -2424,6 +2426,7 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
 	int ret = 0;
 	unsigned int copylen;
 	struct net *net = sock_net(sk);
+	struct netns_ipvs *ipvs = net_ipvs(net);
 
 	BUG_ON(!net);
 	if (!capable(CAP_NET_ADMIN))
@@ -2546,15 +2549,17 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
 		struct ip_vs_daemon_user d[2];
 
 		memset(&d, 0, sizeof(d));
-		if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
+		if (ipvs->sync_state & IP_VS_STATE_MASTER) {
 			d[0].state = IP_VS_STATE_MASTER;
-			strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
-			d[0].syncid = ip_vs_master_syncid;
+			strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
+				sizeof(d[0].mcast_ifn));
+			d[0].syncid = ipvs->master_syncid;
 		}
-		if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
+		if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
 			d[1].state = IP_VS_STATE_BACKUP;
-			strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
-			d[1].syncid = ip_vs_backup_syncid;
+			strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
+				sizeof(d[1].mcast_ifn));
+			d[1].syncid = ipvs->backup_syncid;
 		}
 		if (copy_to_user(user, &d, sizeof(d)) != 0)
 			ret = -EFAULT;
@@ -3061,20 +3066,23 @@ nla_put_failure:
 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
 				   struct netlink_callback *cb)
 {
+	struct net *net = skb_net(skb);
+	struct netns_ipvs *ipvs = net_ipvs(net);
+
 	mutex_lock(&__ip_vs_mutex);
-	if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
+	if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
 		if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
-					   ip_vs_master_mcast_ifn,
-					   ip_vs_master_syncid, cb) < 0)
+					   ipvs->master_mcast_ifn,
+					   ipvs->master_syncid, cb) < 0)
 			goto nla_put_failure;
 
 		cb->args[0] = 1;
 	}
 
-	if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
+	if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
 		if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
-					   ip_vs_backup_mcast_ifn,
-					   ip_vs_backup_syncid, cb) < 0)
+					   ipvs->backup_mcast_ifn,
+					   ipvs->backup_syncid, cb) < 0)
 			goto nla_put_failure;
 
 		cb->args[1] = 1;
@@ -3086,24 +3094,26 @@ nla_put_failure:
 	return skb->len;
 }
 
-static int ip_vs_genl_new_daemon(struct nlattr **attrs)
+static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
 {
 	if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
 	      attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
 	      attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
 		return -EINVAL;
 
-	return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
+	return start_sync_thread(net,
+				 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
 				 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
 				 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
 }
 
-static int ip_vs_genl_del_daemon(struct nlattr **attrs)
+static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
 {
 	if (!attrs[IPVS_DAEMON_ATTR_STATE])
 		return -EINVAL;
 
-	return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
+	return stop_sync_thread(net,
+				nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
 }
 
 static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
@@ -3159,9 +3169,9 @@ static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
 		}
 
 		if (cmd == IPVS_CMD_NEW_DAEMON)
-			ret = ip_vs_genl_new_daemon(daemon_attrs);
+			ret = ip_vs_genl_new_daemon(net, daemon_attrs);
 		else
-			ret = ip_vs_genl_del_daemon(daemon_attrs);
+			ret = ip_vs_genl_del_daemon(net, daemon_attrs);
 		goto out;
 	} else if (cmd == IPVS_CMD_ZERO &&
 		   !info->attrs[IPVS_CMD_ATTR_SERVICE]) {