2 * net/tipc/netlink.c: TIPC configuration handling
4 * Copyright (c) 2005, Wind River Systems
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38 #include <net/genetlink.h>
40 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
42 struct sk_buff *rep_buf;
43 struct nlmsghdr *rep_nlh;
44 struct nlmsghdr *req_nlh = info->nlhdr;
45 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
46 int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN);
48 if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
49 rep_buf = cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
51 rep_buf = cfg_do_cmd(req_userhdr->dest,
53 NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
54 NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
58 skb_push(rep_buf, hdr_space);
59 rep_nlh = (struct nlmsghdr *)rep_buf->data;
60 memcpy(rep_nlh, req_nlh, hdr_space);
61 rep_nlh->nlmsg_len = rep_buf->len;
62 genlmsg_unicast(rep_buf, req_nlh->nlmsg_pid);
68 static struct genl_family family = {
69 .id = GENL_ID_GENERATE,
70 .name = TIPC_GENL_NAME,
71 .version = TIPC_GENL_VERSION,
72 .hdrsize = TIPC_GENL_HDRLEN,
77 static struct genl_ops ops = {
82 static int family_registered = 0;
84 int netlink_start(void)
88 if (genl_register_family(&family))
91 family_registered = 1;
93 if (genl_register_ops(&family, &ops))
99 genl_unregister_family(&family);
100 family_registered = 0;
102 err("Failed to register netlink interface\n");
106 void netlink_stop(void)
108 if (family_registered) {
109 genl_unregister_family(&family);
110 family_registered = 0;