1 files changed, 86 insertions, 72 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e049da8311b5..5cdbc102a418 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -140,11 +140,11 @@ void in_dev_finish_destroy(struct in_device *idev)
 #endif
 	dev_put(dev);
 	if (!idev->dead)
-		printk("Freeing alive in_device %p\n", idev);
-	else {
+		pr_err("Freeing alive in_device %p\n", idev);
+	else
 		kfree(idev);
-	}
 }
+EXPORT_SYMBOL(in_dev_finish_destroy);
 
 static struct in_device *inetdev_init(struct net_device *dev)
 {
@@ -159,7 +159,8 @@ static struct in_device *inetdev_init(struct net_device *dev)
 			sizeof(in_dev->cnf));
 	in_dev->cnf.sysctl = NULL;
 	in_dev->dev = dev;
-	if ((in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl)) == NULL)
+	in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl);
+	if (!in_dev->arp_parms)
 		goto out_kfree;
 	if (IPV4_DEVCONF(in_dev->cnf, FORWARDING))
 		dev_disable_lro(dev);
@@ -405,13 +406,15 @@ struct in_device *inetdev_by_index(struct net *net, int ifindex)
 {
 	struct net_device *dev;
 	struct in_device *in_dev = NULL;
-	read_lock(&dev_base_lock);
-	dev = __dev_get_by_index(net, ifindex);
+
+	rcu_read_lock();
+	dev = dev_get_by_index_rcu(net, ifindex);
 	if (dev)
 		in_dev = in_dev_get(dev);
-	read_unlock(&dev_base_lock);
+	rcu_read_unlock();
 	return in_dev;
 }
+EXPORT_SYMBOL(inetdev_by_index);
 
 /* Called only from RTNL semaphored context. No locks. */
 
@@ -557,7 +560,7 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg
  *	Determine a default network mask, based on the IP address.
  */
 
-static __inline__ int inet_abc_len(__be32 addr)
+static inline int inet_abc_len(__be32 addr)
 {
 	int rc = -1;	/* Something else, probably a multicast. */
 
@@ -646,13 +649,15 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
 	rtnl_lock();
 
 	ret = -ENODEV;
-	if ((dev = __dev_get_by_name(net, ifr.ifr_name)) == NULL)
+	dev = __dev_get_by_name(net, ifr.ifr_name);
+	if (!dev)
 		goto done;
 
 	if (colon)
 		*colon = ':';
 
-	if ((in_dev = __in_dev_get_rtnl(dev)) != NULL) {
+	in_dev = __in_dev_get_rtnl(dev);
+	if (in_dev) {
 		if (tryaddrmatch) {
 			/* Matthias Andree */
 			/* compare label and address (4.4BSD style) */
@@ -720,7 +725,8 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
 
 		if (!ifa) {
 			ret = -ENOBUFS;
-			if ((ifa = inet_alloc_ifa()) == NULL)
+			ifa = inet_alloc_ifa();
+			if (!ifa)
 				break;
 			if (colon)
 				memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
@@ -822,10 +828,10 @@ static int inet_gifconf(struct net_device *dev, char __user *buf, int len)
 	struct ifreq ifr;
 	int done = 0;
 
-	if (!in_dev || (ifa = in_dev->ifa_list) == NULL)
+	if (!in_dev)
 		goto out;
 
-	for (; ifa; ifa = ifa->ifa_next) {
+	for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
 		if (!buf) {
 			done += sizeof(ifr);
 			continue;
@@ -875,36 +881,33 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
 		if (!addr)
 			addr = ifa->ifa_local;
 	} endfor_ifa(in_dev);
-no_in_dev:
-	rcu_read_unlock();
 
 	if (addr)
-		goto out;
+		goto out_unlock;
+no_in_dev:
 
 	/* Not loopback addresses on loopback should be preferred
 	   in this case. It is importnat that lo is the first interface
 	   in dev_base list.
 	 */
-	read_lock(&dev_base_lock);
-	rcu_read_lock();
-	for_each_netdev(net, dev) {
-		if ((in_dev = __in_dev_get_rcu(dev)) == NULL)
+	for_each_netdev_rcu(net, dev) {
+		in_dev = __in_dev_get_rcu(dev);
+		if (!in_dev)
 			continue;
 
 		for_primary_ifa(in_dev) {
 			if (ifa->ifa_scope != RT_SCOPE_LINK &&
 			    ifa->ifa_scope <= scope) {
 				addr = ifa->ifa_local;
-				goto out_unlock_both;
+				goto out_unlock;
 			}
 		} endfor_ifa(in_dev);
 	}
-out_unlock_both:
-	read_unlock(&dev_base_lock);
+out_unlock:
 	rcu_read_unlock();
-out:
 	return addr;
 }
+EXPORT_SYMBOL(inet_select_addr);
 
 static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst,
 			      __be32 local, int scope)
@@ -940,7 +943,7 @@ static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst,
 		}
 	} endfor_ifa(in_dev);
 
-	return same? addr : 0;
+	return same ? addr : 0;
 }
 
 /*
@@ -961,17 +964,16 @@ __be32 inet_confirm_addr(struct in_device *in_dev,
 		return confirm_addr_indev(in_dev, dst, local, scope);
 
 	net = dev_net(in_dev->dev);
-	read_lock(&dev_base_lock);
 	rcu_read_lock();
-	for_each_netdev(net, dev) {
-		if ((in_dev = __in_dev_get_rcu(dev))) {
+	for_each_netdev_rcu(net, dev) {
+		in_dev = __in_dev_get_rcu(dev);
+		if (in_dev) {
 			addr = confirm_addr_indev(in_dev, dst, local, scope);
 			if (addr)
 				break;
 		}
 	}
 	rcu_read_unlock();
-	read_unlock(&dev_base_lock);
 
 	return addr;
 }
@@ -984,14 +986,16 @@ int register_inetaddr_notifier(struct notifier_block *nb)
 {
 	return blocking_notifier_chain_register(&inetaddr_chain, nb);
 }
+EXPORT_SYMBOL(register_inetaddr_notifier);
 
 int unregister_inetaddr_notifier(struct notifier_block *nb)
 {
 	return blocking_notifier_chain_unregister(&inetaddr_chain, nb);
 }
+EXPORT_SYMBOL(unregister_inetaddr_notifier);
 
-/* Rename ifa_labels for a device name change. Make some effort to preserve existing
- * alias numbering and to create unique labels if possible.
+/* Rename ifa_labels for a device name change. Make some effort to preserve
+ * existing alias numbering and to create unique labels if possible.
 */
 static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
 {
@@ -1010,11 +1014,10 @@ static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
 			sprintf(old, ":%d", named);
 			dot = old;
 		}
-		if (strlen(dot) + strlen(dev->name) < IFNAMSIZ) {
+		if (strlen(dot) + strlen(dev->name) < IFNAMSIZ)
 			strcat(ifa->ifa_label, dot);
-		} else {
+		else
 			strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot);
-		}
 skip:
 		rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0);
 	}
@@ -1061,8 +1064,9 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 		if (!inetdev_valid_mtu(dev->mtu))
 			break;
 		if (dev->flags & IFF_LOOPBACK) {
-			struct in_ifaddr *ifa;
-			if ((ifa = inet_alloc_ifa()) != NULL) {
+			struct in_ifaddr *ifa = inet_alloc_ifa();
+
+			if (ifa) {
 				ifa->ifa_local =
 				  ifa->ifa_address = htonl(INADDR_LOOPBACK);
 				ifa->ifa_prefixlen = 8;
@@ -1170,38 +1174,54 @@ nla_put_failure:
 static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	struct net *net = sock_net(skb->sk);
-	int idx, ip_idx;
+	int h, s_h;
+	int idx, s_idx;
+	int ip_idx, s_ip_idx;
 	struct net_device *dev;
 	struct in_device *in_dev;
 	struct in_ifaddr *ifa;
-	int s_ip_idx, s_idx = cb->args[0];
+	struct hlist_head *head;
+	struct hlist_node *node;
 
-	s_ip_idx = ip_idx = cb->args[1];
-	idx = 0;
-	for_each_netdev(net, dev) {
-		if (idx < s_idx)
-			goto cont;
-		if (idx > s_idx)
-			s_ip_idx = 0;
-		if ((in_dev = __in_dev_get_rtnl(dev)) == NULL)
-			goto cont;
-
-		for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
-		     ifa = ifa->ifa_next, ip_idx++) {
-			if (ip_idx < s_ip_idx)
-				continue;
-			if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
+	s_h = cb->args[0];
+	s_idx = idx = cb->args[1];
+	s_ip_idx = ip_idx = cb->args[2];
+
+	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
+		idx = 0;
+		head = &net->dev_index_head[h];
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
+			if (idx < s_idx)
+				goto cont;
+			if (idx > s_idx)
+				s_ip_idx = 0;
+			in_dev = __in_dev_get_rcu(dev);
+			if (!in_dev)
+				goto cont;
+
+			for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
+			     ifa = ifa->ifa_next, ip_idx++) {
+				if (ip_idx < s_ip_idx)
+					continue;
+				if (inet_fill_ifaddr(skb, ifa,
+					     NETLINK_CB(cb->skb).pid,
 					     cb->nlh->nlmsg_seq,
-					     RTM_NEWADDR, NLM_F_MULTI) <= 0)
-				goto done;
-		}
+					     RTM_NEWADDR, NLM_F_MULTI) <= 0) {
+					rcu_read_unlock();
+					goto done;
+				}
+			}
 cont:
-		idx++;
+			idx++;
+		}
+		rcu_read_unlock();
 	}
 
 done:
-	cb->args[0] = idx;
-	cb->args[1] = ip_idx;
+	cb->args[0] = h;
+	cb->args[1] = idx;
+	cb->args[2] = ip_idx;
 
 	return skb->len;
 }
@@ -1239,18 +1259,18 @@ static void devinet_copy_dflt_conf(struct net *net, int i)
 {
 	struct net_device *dev;
 
-	read_lock(&dev_base_lock);
-	for_each_netdev(net, dev) {
+	rcu_read_lock();
+	for_each_netdev_rcu(net, dev) {
 		struct in_device *in_dev;
-		rcu_read_lock();
+
 		in_dev = __in_dev_get_rcu(dev);
 		if (in_dev && !test_bit(i, in_dev->cnf.state))
 			in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i];
-		rcu_read_unlock();
 	}
-	read_unlock(&dev_base_lock);
+	rcu_read_unlock();
 }
 
+/* called with RTNL locked */
 static void inet_forward_change(struct net *net)
 {
 	struct net_device *dev;
@@ -1259,7 +1279,6 @@ static void inet_forward_change(struct net *net)
 	IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on;
 	IPV4_DEVCONF_DFLT(net, FORWARDING) = on;
 
-	read_lock(&dev_base_lock);
 	for_each_netdev(net, dev) {
 		struct in_device *in_dev;
 		if (on)
@@ -1270,7 +1289,6 @@ static void inet_forward_change(struct net *net)
 			IN_DEV_CONF_SET(in_dev, FORWARDING, on);
 		rcu_read_unlock();
 	}
-	read_unlock(&dev_base_lock);
 }
 
 static int devinet_conf_proc(ctl_table *ctl, int write,
@@ -1378,6 +1396,7 @@ static struct devinet_sysctl_table {
 		DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"),
 		DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE,
 					"accept_source_route"),
+		DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"),
 		DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"),
 		DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"),
 		DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"),
@@ -1512,7 +1531,7 @@ static __net_init int devinet_init_net(struct net *net)
 	all = &ipv4_devconf;
 	dflt = &ipv4_devconf_dflt;
 
-	if (net != &init_net) {
+	if (!net_eq(net, &init_net)) {
 		all = kmemdup(all, sizeof(ipv4_devconf), GFP_KERNEL);
 		if (all == NULL)
 			goto err_alloc_all;
@@ -1603,8 +1622,3 @@ void __init devinet_init(void)
 	rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr);
 }
 
-EXPORT_SYMBOL(in_dev_finish_destroy);
-EXPORT_SYMBOL(inet_select_addr);
-EXPORT_SYMBOL(inetdev_by_index);
-EXPORT_SYMBOL(register_inetaddr_notifier);
-EXPORT_SYMBOL(unregister_inetaddr_notifier);