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authorEric W. Biederman <ebiederm@xmission.com>2010-05-04 17:36:46 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-21 09:37:32 -0700
commit910a7e905f36e51a17d6e8bb4ad6dcd5ac5f1d53 (patch)
tree63587b03de37a6b9a6b58c203719a24d57edf850 /include/linux/netlink.h
parentd6523ddf2376f39eaa89a4d68a33052d20c138b9 (diff)
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netlink: Implment netlink_broadcast_filtered
When netlink sockets are used to convey data that is in a namespace we need a way to select a subset of the listening sockets to deliver the packet to. For the network namespace we have been doing this by only transmitting packets in the correct network namespace. For data belonging to other namespaces netlink_bradcast_filtered provides a mechanism that allows us to examine the destination socket and to decide if we should transmit the specified packet to it. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/netlink.h')
-rw-r--r--include/linux/netlink.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 6eaca5e..59d0669 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -188,6 +188,10 @@ 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);
extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid,
__u32 group, gfp_t allocation);
+extern int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb,
+ __u32 pid, __u32 group, gfp_t allocation,
+ int (*filter)(struct sock *dsk, struct sk_buff *skb, void *data),
+ void *filter_data);
extern int netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code);
extern int netlink_register_notifier(struct notifier_block *nb);
extern int netlink_unregister_notifier(struct notifier_block *nb);
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