genetlink: Add genl_notify()

Open vSwitch uses Generic Netlink interface for communication
between userspace and kernel module. genl_notify() is used
for sending notification back to userspace.

genl_notify() is analogous to rtnl_notify() but uses genl_sock
instead of rtnl.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 482fa571b4ee..8a36599d3555 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -946,3 +946,16 @@ int genlmsg_multicast_allns(struct sk_buff *skb, u32 pid, unsigned int group,
         return genlmsg_mcast(skb, pid, group, flags);
 }
 EXPORT_SYMBOL(genlmsg_multicast_allns);
+
+void genl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
+                 struct nlmsghdr *nlh, gfp_t flags)
+{
+        struct sock *sk = net->genl_sock;
+        int report = 0;
+
+        if (nlh)
+                report = nlmsg_report(nlh);
+
+        nlmsg_notify(sk, skb, pid, group, report, flags);
+}
+EXPORT_SYMBOL(genl_notify);