[TCPDIAG]: Introduce inet_diag_{register,unregister}

Next changeset will rename tcp_diag to inet_diag and move the tcp_diag code out
of it and into a new tcp_diag.c, similar to the net/dccp/diag.c introduced in
this changeset, completing the transition to a generic inet_diag
infrastructure.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/tcp_diag.h b/include/linux/tcp_diag.h
index 190494ebcfb8..910c34ba19c0 100644
--- a/include/linux/tcp_diag.h
+++ b/include/linux/tcp_diag.h
@@ -5,6 +5,8 @@
 #define TCPDIAG_GETSOCK 18
 #define DCCPDIAG_GETSOCK 19
 
+#define INET_DIAG_GETSOCK_MAX 24
+
 /* Socket identity */
 struct tcpdiag_sockid
 {
@@ -125,4 +127,21 @@ struct tcpvegas_info {
         __u32   tcpv_minrtt;
 };
 
+#ifdef __KERNEL__
+struct sock;
+struct inet_hashinfo;
+
+struct inet_diag_handler {
+        struct inet_hashinfo    *idiag_hashinfo;
+        void                    (*idiag_get_info)(struct sock *sk,
+                                                  struct tcpdiagmsg *r,
+                                                  void *info);
+        __u16                   idiag_info_size;
+        __u16                   idiag_type;
+};
+
+extern int  inet_diag_register(const struct inet_diag_handler *handler);
+extern void inet_diag_unregister(const struct inet_diag_handler *handler);
+#endif /* __KERNEL__ */
+
 #endif /* _TCP_DIAG_H_ */