2 * net/tipc/netlink.c: TIPC configuration handling
4 * Copyright (c) 2005-2006, 2014, Ericsson AB
5 * Copyright (c) 2005-2007, Wind River Systems
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21 * GNU General Public License ("GPL") version 2 as published by the Free
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40 #include <net/genetlink.h>
42 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
44 struct sk_buff *rep_buf;
45 struct nlmsghdr *rep_nlh;
46 struct nlmsghdr *req_nlh = info->nlhdr;
47 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
48 int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
51 if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
52 cmd = TIPC_CMD_NOT_NET_ADMIN;
54 cmd = req_userhdr->cmd;
56 rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
57 nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
58 nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
62 skb_push(rep_buf, hdr_space);
63 rep_nlh = nlmsg_hdr(rep_buf);
64 memcpy(rep_nlh, req_nlh, hdr_space);
65 rep_nlh->nlmsg_len = rep_buf->len;
66 genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid);
72 static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
73 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
74 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
77 /* Legacy ASCII API */
78 static struct genl_family tipc_genl_family = {
79 .id = GENL_ID_GENERATE,
80 .name = TIPC_GENL_NAME,
81 .version = TIPC_GENL_VERSION,
82 .hdrsize = TIPC_GENL_HDRLEN,
86 /* Legacy ASCII API */
87 static struct genl_ops tipc_genl_ops[] = {
94 /* Users of the legacy API (tipc-config) can't handle that we add operations,
95 * so we have a separate genl handling for the new API.
97 struct genl_family tipc_genl_v2_family = {
98 .id = GENL_ID_GENERATE,
99 .name = TIPC_GENL_V2_NAME,
100 .version = TIPC_GENL_V2_VERSION,
102 .maxattr = TIPC_NLA_MAX,
105 static const struct genl_ops tipc_genl_v2_ops[] = {
107 .cmd = TIPC_NL_BEARER_DISABLE,
108 .doit = tipc_nl_bearer_disable,
109 .policy = tipc_nl_policy,
112 .cmd = TIPC_NL_BEARER_ENABLE,
113 .doit = tipc_nl_bearer_enable,
114 .policy = tipc_nl_policy,
117 .cmd = TIPC_NL_BEARER_GET,
118 .doit = tipc_nl_bearer_get,
119 .dumpit = tipc_nl_bearer_dump,
120 .policy = tipc_nl_policy,
124 int tipc_netlink_start(void)
128 res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
130 pr_err("Failed to register legacy interface\n");
134 res = genl_register_family_with_ops(&tipc_genl_v2_family,
137 pr_err("Failed to register netlink interface\n");
143 void tipc_netlink_stop(void)
145 genl_unregister_family(&tipc_genl_family);
146 genl_unregister_family(&tipc_genl_v2_family);