[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>

3 files changed, 56 insertions, 0 deletions

diff --git a/net/dccp/Kconfig b/net/dccp/Kconfig
index 90460bc629b3..ff5b5459b97a 100644
--- a/net/dccp/Kconfig
+++ b/net/dccp/Kconfig
@@ -19,6 +19,11 @@ config IP_DCCP
 
           If in doubt, say N.
 
+config IP_DCCP_DIAG
+        depends on IP_DCCP && IP_TCPDIAG
+        def_tristate y if (IP_DCCP = y && IP_TCPDIAG = y)
+        def_tristate m
+
 source "net/dccp/ccids/Kconfig"
 
 endmenu
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index 25a50bdbf1bb..5741fffc436f 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -3,4 +3,8 @@ obj-$(CONFIG_IP_DCCP) += dccp.o
 dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \
           timer.o packet_history.o
 
+obj-$(CONFIG_IP_DCCP_DIAG) += dccp_diag.o
+
 obj-y += ccids/
+
+dccp_diag-y := diag.o
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
new file mode 100644
index 000000000000..4d9037c56ddc
--- /dev/null
+++ b/net/dccp/diag.c
@@ -0,0 +1,47 @@
+/*
+ *  net/dccp/diag.c
+ *
+ *  An implementation of the DCCP protocol
+ *  Arnaldo Carvalho de Melo <acme@mandriva.com>
+ *
+ *      This program is free software; you can redistribute it and/or modify it
+ *      under the terms of the GNU General Public License version 2 as
+ *      published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+#include <linux/tcp_diag.h>
+
+#include "dccp.h"
+
+static void dccp_diag_get_info(struct sock *sk, struct tcpdiagmsg *r,
+                               void *_info)
+{
+        r->tcpdiag_rqueue = r->tcpdiag_wqueue = 0;
+}
+
+static struct inet_diag_handler dccp_diag_handler = {
+        .idiag_hashinfo  = &dccp_hashinfo,
+        .idiag_get_info  = dccp_diag_get_info,
+        .idiag_type      = DCCPDIAG_GETSOCK,
+        .idiag_info_size = 0,
+};
+
+static int __init dccp_diag_init(void)
+{
+        return inet_diag_register(&dccp_diag_handler);
+}
+
+static void __exit dccp_diag_fini(void)
+{
+        inet_diag_unregister(&dccp_diag_handler);
+}
+
+module_init(dccp_diag_init);
+module_exit(dccp_diag_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
+MODULE_DESCRIPTION("DCCP inet_diag handler");