1 files changed, 26 insertions, 9 deletions

diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index de2661cd0328..018929563c6b 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -47,14 +47,16 @@
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/ieee802154.h>
+#include <linux/if_arp.h>
 
 #include <net/ipv6.h>
+#include <net/netdev_lock.h>
 
 #include "6lowpan_i.h"
 
 static int open_count;
 
-static struct header_ops lowpan_header_ops = {
+static const struct header_ops lowpan_header_ops = {
 	.create	= lowpan_header_create,
 };
 
@@ -90,12 +92,18 @@ static int lowpan_neigh_construct(struct net_device *dev, struct neighbour *n)
 	return 0;
 }
 
+static int lowpan_get_iflink(const struct net_device *dev)
+{
+	return READ_ONCE(lowpan_802154_dev(dev)->wdev->ifindex);
+}
+
 static const struct net_device_ops lowpan_netdev_ops = {
 	.ndo_init		= lowpan_dev_init,
 	.ndo_start_xmit		= lowpan_xmit,
 	.ndo_open		= lowpan_open,
 	.ndo_stop		= lowpan_stop,
 	.ndo_neigh_construct    = lowpan_neigh_construct,
+	.ndo_get_iflink         = lowpan_get_iflink,
 };
 
 static void lowpan_setup(struct net_device *ldev)
@@ -104,11 +112,12 @@ static void lowpan_setup(struct net_device *ldev)
 	/* We need an ipv6hdr as minimum len when calling xmit */
 	ldev->hard_header_len	= sizeof(struct ipv6hdr);
 	ldev->flags		= IFF_BROADCAST | IFF_MULTICAST;
+	ldev->priv_flags	|= IFF_NO_QUEUE;
 
 	ldev->netdev_ops	= &lowpan_netdev_ops;
 	ldev->header_ops	= &lowpan_header_ops;
 	ldev->needs_free_netdev	= true;
-	ldev->features		|= NETIF_F_NETNS_LOCAL;
+	ldev->netns_immutable	= true;
 }
 
 static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[],
@@ -121,10 +130,11 @@ static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[],
 	return 0;
 }
 
-static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
-			  struct nlattr *tb[], struct nlattr *data[],
+static int lowpan_newlink(struct net_device *ldev,
+			  struct rtnl_newlink_params *params,
 			  struct netlink_ext_ack *extack)
 {
+	struct nlattr **tb = params->tb;
 	struct net_device *wdev;
 	int ret;
 
@@ -134,6 +144,8 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
 
 	if (!tb[IFLA_LINK])
 		return -EINVAL;
+	if (params->link_net && !net_eq(params->link_net, dev_net(ldev)))
+		return -EINVAL;
 	/* find and hold wpan device */
 	wdev = dev_get_by_index(dev_net(ldev), nla_get_u32(tb[IFLA_LINK]));
 	if (!wdev)
@@ -150,7 +162,7 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
 
 	lowpan_802154_dev(ldev)->wdev = wdev;
 	/* Set the lowpan hardware address to the wpan hardware address. */
-	memcpy(ldev->dev_addr, wdev->dev_addr, IEEE802154_ADDR_LEN);
+	__dev_addr_set(ldev, wdev->dev_addr, IEEE802154_ADDR_LEN);
 	/* We need headroom for possible wpan_dev_hard_header call and tailroom
 	 * for encryption/fcs handling. The lowpan interface will replace
 	 * the IPv6 header with 6LoWPAN header. At worst case the 6LoWPAN
@@ -206,9 +218,13 @@ static inline void lowpan_netlink_fini(void)
 static int lowpan_device_event(struct notifier_block *unused,
 			       unsigned long event, void *ptr)
 {
-	struct net_device *wdev = netdev_notifier_info_to_dev(ptr);
+	struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
+	struct wpan_dev *wpan_dev;
 
-	if (wdev->type != ARPHRD_IEEE802154)
+	if (ndev->type != ARPHRD_IEEE802154)
+		return NOTIFY_DONE;
+	wpan_dev = ndev->ieee802154_ptr;
+	if (!wpan_dev)
 		return NOTIFY_DONE;
 
 	switch (event) {
@@ -217,8 +233,8 @@ static int lowpan_device_event(struct notifier_block *unused,
 		 * also delete possible lowpan interfaces which belongs
 		 * to the wpan interface.
 		 */
-		if (wdev->ieee802154_ptr->lowpan_dev)
-			lowpan_dellink(wdev->ieee802154_ptr->lowpan_dev, NULL);
+		if (wpan_dev->lowpan_dev)
+			lowpan_dellink(wpan_dev->lowpan_dev, NULL);
 		break;
 	default:
 		return NOTIFY_DONE;
@@ -268,5 +284,6 @@ static void __exit lowpan_cleanup_module(void)
 
 module_init(lowpan_init_module);
 module_exit(lowpan_cleanup_module);
+MODULE_DESCRIPTION("IPv6 over Low power Wireless Personal Area Network IEEE 802.15.4 core");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_RTNL_LINK("lowpan");