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From 0d37e6edc09c99e683dd91ca0e83bbc0df8477b3 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Sun, 16 Jul 2017 16:56:10 +0200
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Subject: lib: add uevent_next_seqnum()
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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include/linux/kobject.h | 5 +++++
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lib/kobject_uevent.c | 37 +++++++++++++++++++++++++++++++++++++
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2 files changed, 42 insertions(+)
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--- a/include/linux/kobject.h
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+++ b/include/linux/kobject.h
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@@ -32,6 +32,8 @@
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#define UEVENT_NUM_ENVP 32 /* number of env pointers */
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#define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */
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+struct sk_buff;
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+
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#ifdef CONFIG_UEVENT_HELPER
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/* path to the userspace helper executed on an event */
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extern char uevent_helper[];
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@@ -222,4 +224,7 @@ int add_uevent_var(struct kobj_uevent_en
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int kobject_action_type(const char *buf, size_t count,
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enum kobject_action *type);
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+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
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+ gfp_t allocation);
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+
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#endif /* _KOBJECT_H_ */
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--- a/lib/kobject_uevent.c
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+++ b/lib/kobject_uevent.c
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@@ -423,6 +423,43 @@ int add_uevent_var(struct kobj_uevent_en
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EXPORT_SYMBOL_GPL(add_uevent_var);
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#if defined(CONFIG_NET)
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+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
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+ gfp_t allocation)
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+{
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+ struct uevent_sock *ue_sk;
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+ int err = 0;
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+
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+ /* send netlink message */
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+ mutex_lock(&uevent_sock_mutex);
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+ list_for_each_entry(ue_sk, &uevent_sock_list, list) {
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+ struct sock *uevent_sock = ue_sk->sk;
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+ struct sk_buff *skb2;
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+
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+ skb2 = skb_clone(skb, allocation);
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+ if (!skb2)
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+ break;
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+
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+ err = netlink_broadcast(uevent_sock, skb2, pid, group,
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+ allocation);
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+ if (err)
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+ break;
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+ }
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+ mutex_unlock(&uevent_sock_mutex);
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+
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+ kfree_skb(skb);
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+ return err;
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+}
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+#else
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+int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
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+ gfp_t allocation)
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+{
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+ kfree_skb(skb);
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+ return 0;
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+}
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+#endif
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+EXPORT_SYMBOL_GPL(broadcast_uevent);
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+
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+#if defined(CONFIG_NET)
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static int uevent_net_init(struct net *net)
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{
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struct uevent_sock *ue_sk;
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