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[net-next,1/4] genetlink: Add genl_notify()

Message ID 1321657938-21761-2-git-send-email-jesse@nicira.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Jesse Gross Nov. 18, 2011, 11:12 p.m. UTC 
From: Pravin B Shelar <pshelar@nicira.com>

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>
---
 include/net/genetlink.h |    2 ++
 net/netlink/genetlink.c |   13 +++++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)
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Patch

diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 82d8d09..7db3299 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -128,6 +128,8 @@  extern int genl_register_mc_group(struct genl_family *family,
 				  struct genl_multicast_group *grp);
 extern void genl_unregister_mc_group(struct genl_family *family,
 				     struct genl_multicast_group *grp);
+extern void genl_notify(struct sk_buff *skb, struct net *net, u32 pid,
+			u32 group, struct nlmsghdr *nlh, gfp_t flags);
 
 /**
  * genlmsg_put - Add generic netlink header to netlink message
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 482fa57..8a36599 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);