openwrt/target/linux/generic/patches-3.3/911-kobject_add_broadcast_uevent.patch

--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -31,6 +31,8 @@
 #define UEVENT_NUM_ENVP			32	/* number of env pointers */
 #define UEVENT_BUFFER_SIZE		2048	/* buffer for the variables */
 
+struct sk_buff;
+
 /* path to the userspace helper executed on an event */
 extern char uevent_helper[];
 
@@ -213,6 +215,10 @@ int add_uevent_var(struct kobj_uevent_en
 
 int kobject_action_type(const char *buf, size_t count,
 			enum kobject_action *type);
+
+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
+		     gfp_t allocation);
+
 #else
 static inline int kobject_uevent(struct kobject *kobj,
 				 enum kobject_action action)
@@ -229,6 +235,16 @@ int add_uevent_var(struct kobj_uevent_en
 static inline int kobject_action_type(const char *buf, size_t count,
 				      enum kobject_action *type)
 { return -EINVAL; }
+
+void kfree_skb(struct sk_buff *);
+
+static inline int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
+				   gfp_t allocation)
+{
+	kfree_skb(skb);
+	return 0;
+}
+
 #endif
 
 #endif /* _KOBJECT_H_ */
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -381,6 +381,43 @@ int add_uevent_var(struct kobj_uevent_en
 EXPORT_SYMBOL_GPL(add_uevent_var);
 
 #if defined(CONFIG_NET)
+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
+		     gfp_t allocation)
+{
+	struct uevent_sock *ue_sk;
+	int err = 0;
+
+	/* send netlink message */
+	mutex_lock(&uevent_sock_mutex);
+	list_for_each_entry(ue_sk, &uevent_sock_list, list) {
+		struct sock *uevent_sock = ue_sk->sk;
+		struct sk_buff *skb2;
+
+		skb2 = skb_clone(skb, allocation);
+		if (!skb2)
+			break;
+
+		err = netlink_broadcast(uevent_sock, skb2, pid, group,
+					allocation);
+		if (err)
+			break;
+	}
+	mutex_unlock(&uevent_sock_mutex);
+
+	kfree_skb(skb);
+	return err;
+}
+#else
+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
+		     gfp_t allocation)
+{
+	kfree_skb(skb);
+	return 0;
+}
+#endif
+EXPORT_SYMBOL_GPL(broadcast_uevent);
+
+#if defined(CONFIG_NET)
 static int uevent_net_init(struct net *net)
 {
 	struct uevent_sock *ue_sk;