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authorPer Liden <per.liden@nospam.ericsson.com>2006-01-02 19:04:38 +0100
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-12 14:06:31 -0800
commitb97bf3fd8f6a16966d4f18983b2c40993ff937d4 (patch)
tree59959f8a0f3087455efdcb430846686f303c5991 /net/tipc/netlink.c
parent58cba4650a7a414eabd2b40cc9d8e45fcdf192d9 (diff)
downloadlinux-b97bf3fd8f6a16966d4f18983b2c40993ff937d4.tar.bz2
[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>
Diffstat (limited to 'net/tipc/netlink.c')
-rw-r--r--net/tipc/netlink.c107
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;
+ }
+}