[TIPC] Initial merge

TIPC (Transparent Inter Process Communication) is a protocol designed for
intra cluster communication. For more information see
http://tipc.sourceforge.net

Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
new file mode 100644
index 000000000000..35fbc7933604
--- /dev/null
+++ b/net/tipc/netlink.c
@@ -0,0 +1,107 @@
+/*
+ * net/tipc/netlink.c: TIPC configuration handling
+ * 
+ * Copyright (c) 2005, Wind River Systems
+ * Copyright (c) 2005-2006, 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:
+ *
+ * Redistributions of source code must retain the above copyright notice, this 
+ * list of conditions and the following disclaimer.
+ * 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.
+ * 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.
+ *
+ * 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>
+
+static int handle_cmd(struct sk_buff *skb, struct genl_info *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_SPACE(0);
+
+        if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
+                rep_buf = cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
+        else
+                rep_buf = cfg_do_cmd(req_userhdr->dest,
+                                     req_userhdr->cmd,
+                                     NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
+                                     NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
+                                     hdr_space);
+
+        if (rep_buf) {
+                skb_push(rep_buf, hdr_space);
+                rep_nlh = (struct nlmsghdr *)rep_buf->data;
+                memcpy(rep_nlh, req_nlh, hdr_space);
+                rep_nlh->nlmsg_len = rep_buf->len;
+                genlmsg_unicast(rep_buf, req_nlh->nlmsg_pid);
+        }
+
+        return 0;
+}
+
+static struct genl_family family = {
+        .id             = TIPC_GENL_FAMILY,
+        .name           = TIPC_GENL_NAME,
+        .version        = TIPC_GENL_VERSION,
+        .hdrsize        = TIPC_GENL_HDRLEN,
+        .maxattr        = 0,
+        .owner          = THIS_MODULE,
+};
+
+static struct genl_ops ops = {
+        .cmd            = TIPC_GENL_CMD,
+        .doit           = handle_cmd,
+};
+
+static int family_registered = 0;
+
+int netlink_start(void)
+{
+        if (genl_register_family(&family))
+                goto err;
+
+        family_registered = 1;
+
+        if (genl_register_ops(&family, &ops))
+                goto err_unregister;
+
+        return 0;
+
+ err_unregister:
+        genl_unregister_family(&family);
+        family_registered = 0;
+ err:
+        err("Failed to register netlink interface");
+        return -EFAULT;
+}
+
+void netlink_stop(void)
+{
+        if (family_registered) {
+                genl_unregister_family(&family);
+                family_registered = 0;
+        }
+}