| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 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 | --- a/include/linux/kobject.h |
| 13 | +++ b/include/linux/kobject.h |
| 14 | @@ -32,6 +32,8 @@ |
| 15 | #define UEVENT_NUM_ENVP 32 /* number of env pointers */ |
| 16 | #define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */ |
| 17 | |
| 18 | +struct sk_buff; |
| 19 | + |
| 20 | #ifdef CONFIG_UEVENT_HELPER |
| 21 | /* path to the userspace helper executed on an event */ |
| 22 | extern char uevent_helper[]; |
| 23 | @@ -245,4 +247,7 @@ int kobject_synth_uevent(struct kobject |
| 24 | __printf(2, 3) |
| 25 | int add_uevent_var(struct kobj_uevent_env *env, const char *format, ...); |
| 26 | |
| 27 | +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group, |
| 28 | + gfp_t allocation); |
| 29 | + |
| 30 | #endif /* _KOBJECT_H_ */ |
| 31 | --- a/lib/kobject_uevent.c |
| 32 | +++ b/lib/kobject_uevent.c |
| 33 | @@ -691,6 +691,43 @@ int add_uevent_var(struct kobj_uevent_en |
| 34 | EXPORT_SYMBOL_GPL(add_uevent_var); |
| 35 | |
| 36 | #if defined(CONFIG_NET) |
| 37 | +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group, |
| 38 | + gfp_t allocation) |
| 39 | +{ |
| 40 | + struct uevent_sock *ue_sk; |
| 41 | + int err = 0; |
| 42 | + |
| 43 | + /* send netlink message */ |
| 44 | + mutex_lock(&uevent_sock_mutex); |
| 45 | + list_for_each_entry(ue_sk, &uevent_sock_list, list) { |
| 46 | + struct sock *uevent_sock = ue_sk->sk; |
| 47 | + struct sk_buff *skb2; |
| 48 | + |
| 49 | + skb2 = skb_clone(skb, allocation); |
| 50 | + if (!skb2) |
| 51 | + break; |
| 52 | + |
| 53 | + err = netlink_broadcast(uevent_sock, skb2, pid, group, |
| 54 | + allocation); |
| 55 | + if (err) |
| 56 | + break; |
| 57 | + } |
| 58 | + mutex_unlock(&uevent_sock_mutex); |
| 59 | + |
| 60 | + kfree_skb(skb); |
| 61 | + return err; |
| 62 | +} |
| 63 | +#else |
| 64 | +int broadcast_uevent(struct sk_buff *skb, __u32 pid, __u32 group, |
| 65 | + gfp_t allocation) |
| 66 | +{ |
| 67 | + kfree_skb(skb); |
| 68 | + return 0; |
| 69 | +} |
| 70 | +#endif |
| 71 | +EXPORT_SYMBOL_GPL(broadcast_uevent); |
| 72 | + |
| 73 | +#if defined(CONFIG_NET) |
| 74 | static int uevent_net_broadcast(struct sock *usk, struct sk_buff *skb, |
| 75 | struct netlink_ext_ack *extack) |
| 76 | { |