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- From 0d37e6edc09c99e683dd91ca0e83bbc0df8477b3 Mon Sep 17 00:00:00 2001
- From: Felix Fietkau <[email protected]>
- Date: Sun, 16 Jul 2017 16:56:10 +0200
- Subject: lib: add broadcast_uevent()
- Signed-off-by: Felix Fietkau <[email protected]>
- ---
- include/linux/kobject.h | 5 +++++
- lib/kobject_uevent.c | 37 +++++++++++++++++++++++++++++++++++++
- 2 files changed, 42 insertions(+)
- --- a/include/linux/kobject.h
- +++ b/include/linux/kobject.h
- @@ -32,6 +32,8 @@
- #define UEVENT_NUM_ENVP 64 /* 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[];
- @@ -221,4 +223,7 @@ int add_uevent_var(struct kobj_uevent_en
-
- u64 uevent_next_seqnum(void);
-
- +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
- + gfp_t allocation);
- +
- #endif /* _KOBJECT_H_ */
- --- a/lib/kobject_uevent.c
- +++ b/lib/kobject_uevent.c
- @@ -699,6 +699,43 @@ 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_broadcast(struct sock *usk, struct sk_buff *skb,
- struct netlink_ext_ack *extack)
- {
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