1 files changed, 105 insertions, 0 deletions
diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
new file mode 100644
index 0000000..f752854
--- /dev/null
+++ b/net/tipc/netlink_compat.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2014, Ericsson AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "core.h"
+#include "config.h"
+#include <net/genetlink.h>
+#include <linux/tipc_config.h>
+
+static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = genl_info_net(info);
+	struct sk_buff *rep_buf;
+	struct nlmsghdr *rep_nlh;
+	struct nlmsghdr *req_nlh = info->nlhdr;
+	struct tipc_genlmsghdr *req_userhdr = info->userhdr;
+	int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
+	u16 cmd;
+
+	if ((req_userhdr->cmd & 0xC000) &&
+	    (!netlink_net_capable(skb, CAP_NET_ADMIN)))
+		cmd = TIPC_CMD_NOT_NET_ADMIN;
+	else
+		cmd = req_userhdr->cmd;
+
+	rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd,
+				  nlmsg_data(req_nlh) + GENL_HDRLEN +
+				  TIPC_GENL_HDRLEN,
+				  nlmsg_attrlen(req_nlh, GENL_HDRLEN +
+				  TIPC_GENL_HDRLEN), hdr_space);
+
+	if (rep_buf) {
+		skb_push(rep_buf, hdr_space);
+		rep_nlh = nlmsg_hdr(rep_buf);
+		memcpy(rep_nlh, req_nlh, hdr_space);
+		rep_nlh->nlmsg_len = rep_buf->len;
+		genlmsg_unicast(net, rep_buf, NETLINK_CB(skb).portid);
+	}
+
+	return 0;
+}
+
+static struct genl_family tipc_genl_compat_family = {
+	.id		= GENL_ID_GENERATE,
+	.name		= TIPC_GENL_NAME,
+	.version	= TIPC_GENL_VERSION,
+	.hdrsize	= TIPC_GENL_HDRLEN,
+	.maxattr	= 0,
+	.netnsok	= true,
+};
+
+static struct genl_ops tipc_genl_compat_ops[] = {
+	{
+		.cmd		= TIPC_GENL_CMD,
+		.doit		= handle_cmd,
+	},
+};
+
+int tipc_netlink_compat_start(void)
+{
+	int res;
+
+	res = genl_register_family_with_ops(&tipc_genl_compat_family,
+					    tipc_genl_compat_ops);
+	if (res) {
+		pr_err("Failed to register legacy compat interface\n");
+		return res;
+	}
+
+	return 0;
+}
+
+void tipc_netlink_compat_stop(void)
+{
+	genl_unregister_family(&tipc_genl_compat_family);
+}