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authorThomas Graf <tgraf@suug.ch>2006-08-15 11:31:06 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-23 01:54:49 +0400
commitd387f6ad10764fc2174373b4a1cca443adee36e3 (patch)
treeed22c34f55de9c668eed1727d46239f3b48599b7 /include
parent2942e90050569525628a9f34e0daaa9b661b49cc (diff)
downloadlinux-d387f6ad10764fc2174373b4a1cca443adee36e3.tar.xz
[NETLINK]: Add notification message sending interface
Adds nlmsg_notify() implementing proper notification logic. The message is multicasted to all listeners in the group. The applications the requests orignates from can request a unicast back report in which case said socket will be excluded from the multicast to avoid duplicated notifications. nlmsg_multicast() is extended to take allocation flags to allow notification in atomic contexts. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/genetlink.h5
-rw-r--r--include/net/netlink.h6
2 files changed, 7 insertions, 4 deletions
diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index 8c2287264266..97d6d3aba9d2 100644
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -133,11 +133,12 @@ static inline int genlmsg_cancel(struct sk_buff *skb, void *hdr)
* @skb: netlink message as socket buffer
* @pid: own netlink pid to avoid sending to yourself
* @group: multicast group id
+ * @flags: allocation flags
*/
static inline int genlmsg_multicast(struct sk_buff *skb, u32 pid,
- unsigned int group)
+ unsigned int group, gfp_t flags)
{
- return nlmsg_multicast(genl_sock, skb, pid, group);
+ return nlmsg_multicast(genl_sock, skb, pid, group, flags);
}
/**
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 3a5e40b1e045..b154b81d9a7a 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -43,6 +43,7 @@
* Message Sending:
* nlmsg_multicast() multicast message to several groups
* nlmsg_unicast() unicast a message to a single socket
+ * nlmsg_notify() send notification message
*
* Message Length Calculations:
* nlmsg_msg_size(payload) length of message w/o padding
@@ -545,15 +546,16 @@ static inline void nlmsg_free(struct sk_buff *skb)
* @skb: netlink message as socket buffer
* @pid: own netlink pid to avoid sending to yourself
* @group: multicast group id
+ * @flags: allocation flags
*/
static inline int nlmsg_multicast(struct sock *sk, struct sk_buff *skb,
- u32 pid, unsigned int group)
+ u32 pid, unsigned int group, gfp_t flags)
{
int err;
NETLINK_CB(skb).dst_group = group;
- err = netlink_broadcast(sk, skb, pid, group, GFP_KERNEL);
+ err = netlink_broadcast(sk, skb, pid, group, flags);
if (err > 0)
err = 0;