From bb9b18fb55b03477fe5bdd3e97245d6d4d3dee4f Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Sat, 30 Nov 2013 13:21:30 +0100 Subject: genl: Add genlmsg_new_unicast() for unicast message allocation Allocates a new sk_buff large enough to cover the specified payload plus required Netlink headers. Will check receiving socket for memory mapped i/o capability and use it if enabled. Will fall back to non-mapped skb if message size exceeds the frame size of the ring. Signed-of-by: Thomas Graf Reviewed-by: Daniel Borkmann Signed-off-by: Jesse Gross --- include/net/genetlink.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/net/genetlink.h') diff --git a/include/net/genetlink.h b/include/net/genetlink.h index 1b177ed803b7..93695f0e22a5 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -73,6 +73,7 @@ struct genl_family { * @attrs: netlink attributes * @_net: network namespace * @user_ptr: user pointers + * @dst_sk: destination socket */ struct genl_info { u32 snd_seq; @@ -85,6 +86,7 @@ struct genl_info { struct net * _net; #endif void * user_ptr[2]; + struct sock * dst_sk; }; static inline struct net *genl_info_net(struct genl_info *info) @@ -177,6 +179,8 @@ void genl_notify(struct genl_family *family, struct sk_buff *skb, struct net *net, u32 portid, u32 group, struct nlmsghdr *nlh, gfp_t flags); +struct sk_buff *genlmsg_new_unicast(size_t payload, struct genl_info *info, + gfp_t flags); void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq, struct genl_family *family, int flags, u8 cmd); -- cgit v1.2.3