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[NETLINK]: Add notification message sending interface

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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>
This commit is contained in:
Thomas Graf
2006-08-15 00:31:06 -07:00
committed by David S. Miller
parent 2942e90050
commit d387f6ad10
5 changed files with 42 additions and 7 deletions
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5
include/net/genetlink.h
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@@ -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);
}
/**