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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43 #include <net/genetlink.h>
45 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
47 struct sk_buff *rep_buf;
48 struct nlmsghdr *rep_nlh;
49 struct nlmsghdr *req_nlh = info->nlhdr;
50 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
51 int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
54 if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
55 cmd = TIPC_CMD_NOT_NET_ADMIN;
57 cmd = req_userhdr->cmd;
59 rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
60 nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
61 nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
65 skb_push(rep_buf, hdr_space);
66 rep_nlh = nlmsg_hdr(rep_buf);
67 memcpy(rep_nlh, req_nlh, hdr_space);
68 rep_nlh->nlmsg_len = rep_buf->len;
69 genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid);
75 static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
76 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
77 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
78 [TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
79 [TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
80 [TIPC_NLA_LINK] = { .type = NLA_NESTED, },
81 [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
82 [TIPC_NLA_NODE] = { .type = NLA_NESTED, }
85 /* Legacy ASCII API */
86 static struct genl_family tipc_genl_family = {
87 .id = GENL_ID_GENERATE,
88 .name = TIPC_GENL_NAME,
89 .version = TIPC_GENL_VERSION,
90 .hdrsize = TIPC_GENL_HDRLEN,
94 /* Legacy ASCII API */
95 static struct genl_ops tipc_genl_ops[] = {
102 /* Users of the legacy API (tipc-config) can't handle that we add operations,
103 * so we have a separate genl handling for the new API.
105 struct genl_family tipc_genl_v2_family = {
106 .id = GENL_ID_GENERATE,
107 .name = TIPC_GENL_V2_NAME,
108 .version = TIPC_GENL_V2_VERSION,
110 .maxattr = TIPC_NLA_MAX,
113 static const struct genl_ops tipc_genl_v2_ops[] = {
115 .cmd = TIPC_NL_BEARER_DISABLE,
116 .doit = tipc_nl_bearer_disable,
117 .policy = tipc_nl_policy,
120 .cmd = TIPC_NL_BEARER_ENABLE,
121 .doit = tipc_nl_bearer_enable,
122 .policy = tipc_nl_policy,
125 .cmd = TIPC_NL_BEARER_GET,
126 .doit = tipc_nl_bearer_get,
127 .dumpit = tipc_nl_bearer_dump,
128 .policy = tipc_nl_policy,
131 .cmd = TIPC_NL_BEARER_SET,
132 .doit = tipc_nl_bearer_set,
133 .policy = tipc_nl_policy,
136 .cmd = TIPC_NL_SOCK_GET,
137 .dumpit = tipc_nl_sk_dump,
138 .policy = tipc_nl_policy,
141 .cmd = TIPC_NL_PUBL_GET,
142 .dumpit = tipc_nl_publ_dump,
143 .policy = tipc_nl_policy,
146 .cmd = TIPC_NL_LINK_GET,
147 .doit = tipc_nl_link_get,
148 .dumpit = tipc_nl_link_dump,
149 .policy = tipc_nl_policy,
152 .cmd = TIPC_NL_LINK_SET,
153 .doit = tipc_nl_link_set,
154 .policy = tipc_nl_policy,
157 .cmd = TIPC_NL_LINK_RESET_STATS,
158 .doit = tipc_nl_link_reset_stats,
159 .policy = tipc_nl_policy,
162 .cmd = TIPC_NL_MEDIA_GET,
163 .doit = tipc_nl_media_get,
164 .dumpit = tipc_nl_media_dump,
165 .policy = tipc_nl_policy,
168 .cmd = TIPC_NL_MEDIA_SET,
169 .doit = tipc_nl_media_set,
170 .policy = tipc_nl_policy,
173 .cmd = TIPC_NL_NODE_GET,
174 .dumpit = tipc_nl_node_dump,
175 .policy = tipc_nl_policy,
179 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
181 u32 maxattr = tipc_genl_v2_family.maxattr;
183 *attr = tipc_genl_v2_family.attrbuf;
187 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
190 int tipc_netlink_start(void)
194 res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
196 pr_err("Failed to register legacy interface\n");
200 res = genl_register_family_with_ops(&tipc_genl_v2_family,
203 pr_err("Failed to register netlink interface\n");
209 void tipc_netlink_stop(void)
211 genl_unregister_family(&tipc_genl_family);
212 genl_unregister_family(&tipc_genl_v2_family);