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authorJohannes Berg <johannes@sipsolutions.net>2007-07-19 02:46:06 +0400
committerDavid S. Miller <davem@davemloft.net>2007-07-19 02:46:06 +0400
commitb4ff4f0419ae5db83553fab79d03a89c10d540a8 (patch)
tree17695af46692c31ec1f33ffb68bc686064227913 /include/linux/netlink.h
parentc81de6addb913423acef6e692fd70688180ab5dd (diff)
downloadlinux-b4ff4f0419ae5db83553fab79d03a89c10d540a8.tar.xz
[NETLINK]: allocate group bitmaps dynamically
Allow changing the number of groups for a netlink family after it has been created, use RCU to protect the listeners bitmap keeping netlink_has_listeners() lock-free. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Patrick McHardy <kaber@trash.net> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netlink.h')
-rw-r--r--include/linux/netlink.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 2e23353c28a5..b971ddd24090 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -161,6 +161,7 @@ extern struct sock *netlink_kernel_create(int unit, unsigned int groups,
void (*input)(struct sock *sk, int len),
struct mutex *cb_mutex,
struct module *module);
+extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);
extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
extern int netlink_has_listeners(struct sock *sk, unsigned int group);
extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock);