target/linux/generic/hack-4.9/911-kobject_add_broadcast_uevent.patch

   1 From 0d37e6edc09c99e683dd91ca0e83bbc0df8477b3 Mon Sep 17 00:00:00 2001
   2 From: Felix Fietkau <nbd@nbd.name>
   3 Date: Sun, 16 Jul 2017 16:56:10 +0200
   4 Subject: lib: add uevent_next_seqnum()
   5
   6 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   7 ---
   8  include/linux/kobject.h |  5 +++++
   9  lib/kobject_uevent.c    | 37 +++++++++++++++++++++++++++++++++++++
  10  2 files changed, 42 insertions(+)
  11
  12 diff --git a/include/linux/kobject.h b/include/linux/kobject.h
  13 index a7dc9e61f433..3d6950c957cd 100644
  14 --- a/include/linux/kobject.h
  15 +++ b/include/linux/kobject.h
  16 @@ -34,6 +34,8 @@
  17
  18  struct sk_buff;
  19
  20 +struct sk_buff;
  21 +
  22  #ifdef CONFIG_UEVENT_HELPER
  23  /* path to the userspace helper executed on an event */
  24  extern char uevent_helper[];
  25 @@ -227,4 +229,7 @@ int kobject_action_type(const char *buf, size_t count,
  26  int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
  27                      gfp_t allocation);
  28
  29 +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
  30 +                    gfp_t allocation);
  31 +
  32  #endif /* _KOBJECT_H_ */
  33 diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
  34 index ac0c7cfa7292..bd13381a410f 100644
  35 --- a/lib/kobject_uevent.c
  36 +++ b/lib/kobject_uevent.c
  37 @@ -460,6 +460,43 @@ int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
  38  EXPORT_SYMBOL_GPL(broadcast_uevent);
  39
  40  #if defined(CONFIG_NET)
  41 +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
  42 +                    gfp_t allocation)
  43 +{
  44 +       struct uevent_sock *ue_sk;
  45 +       int err = 0;
  46 +
  47 +       /* send netlink message */
  48 +       mutex_lock(&uevent_sock_mutex);
  49 +       list_for_each_entry(ue_sk, &uevent_sock_list, list) {
  50 +               struct sock *uevent_sock = ue_sk->sk;
  51 +               struct sk_buff *skb2;
  52 +
  53 +               skb2 = skb_clone(skb, allocation);
  54 +               if (!skb2)
  55 +                       break;
  56 +
  57 +               err = netlink_broadcast(uevent_sock, skb2, pid, group,
  58 +                                       allocation);
  59 +               if (err)
  60 +                       break;
  61 +       }
  62 +       mutex_unlock(&uevent_sock_mutex);
  63 +
  64 +       kfree_skb(skb);
  65 +       return err;
  66 +}
  67 +#else
  68 +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group,
  69 +                    gfp_t allocation)
  70 +{
  71 +       kfree_skb(skb);
  72 +       return 0;
  73 +}
  74 +#endif
  75 +EXPORT_SYMBOL_GPL(broadcast_uevent);
  76 +
  77 +#if defined(CONFIG_NET)
  78  static int uevent_net_init(struct net *net)
  79  {
  80         struct uevent_sock *ue_sk;
  81 --
  82 2.11.0
  83