From cf803dc61873314aee06199011aea2102cb1c56e Mon Sep 17 00:00:00 2001
From: Oskar Viljasaar <oskar.viljasaar@iopsys.eu>
Date: Tue, 19 Jan 2021 10:47:12 +0100
Subject: [PATCH] Import openwrt hack patch
911-kobject_add_broadcast_uevent.patch
---
include/linux/kobject.h | 5 +++++
lib/kobject_uevent.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 42 insertions(+)
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 1ab0d624fb..f0320e1861 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -32,6 +32,8 @@
#define UEVENT_NUM_ENVP 32 /* number of env pointers */
#define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */
+struct sk_buff;
+
#ifdef CONFIG_UEVENT_HELPER
/* path to the userspace helper executed on an event */
extern char uevent_helper[];
@@ -244,4 +246,7 @@ int kobject_synth_uevent(struct kobject *kobj, const char *buf, size_t count);
__printf(2, 3)
int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...);
+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
+ gfp_t allocation);
+
#endif /* _KOBJECT_H_ */
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 81da622c6c..e8d5f00b23 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -687,6 +687,43 @@ int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...)
}
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_broadcast(struct sock *usk, struct sk_buff *skb,
struct netlink_ext_ack *extack)
--
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