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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41 #include <net/genetlink.h>
43 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
45 struct sk_buff *rep_buf;
46 struct nlmsghdr *rep_nlh;
47 struct nlmsghdr *req_nlh = info->nlhdr;
48 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
49 int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
52 if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
53 cmd = TIPC_CMD_NOT_NET_ADMIN;
55 cmd = req_userhdr->cmd;
57 rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
58 nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
59 nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
63 skb_push(rep_buf, hdr_space);
64 rep_nlh = nlmsg_hdr(rep_buf);
65 memcpy(rep_nlh, req_nlh, hdr_space);
66 rep_nlh->nlmsg_len = rep_buf->len;
67 genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid);
73 static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
74 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
75 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
76 [TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
77 [TIPC_NLA_PUBL] = { .type = NLA_NESTED, }
80 /* Legacy ASCII API */
81 static struct genl_family tipc_genl_family = {
82 .id = GENL_ID_GENERATE,
83 .name = TIPC_GENL_NAME,
84 .version = TIPC_GENL_VERSION,
85 .hdrsize = TIPC_GENL_HDRLEN,
89 /* Legacy ASCII API */
90 static struct genl_ops tipc_genl_ops[] = {
97 /* Users of the legacy API (tipc-config) can't handle that we add operations,
98 * so we have a separate genl handling for the new API.
100 struct genl_family tipc_genl_v2_family = {
101 .id = GENL_ID_GENERATE,
102 .name = TIPC_GENL_V2_NAME,
103 .version = TIPC_GENL_V2_VERSION,
105 .maxattr = TIPC_NLA_MAX,
108 static const struct genl_ops tipc_genl_v2_ops[] = {
110 .cmd = TIPC_NL_BEARER_DISABLE,
111 .doit = tipc_nl_bearer_disable,
112 .policy = tipc_nl_policy,
115 .cmd = TIPC_NL_BEARER_ENABLE,
116 .doit = tipc_nl_bearer_enable,
117 .policy = tipc_nl_policy,
120 .cmd = TIPC_NL_BEARER_GET,
121 .doit = tipc_nl_bearer_get,
122 .dumpit = tipc_nl_bearer_dump,
123 .policy = tipc_nl_policy,
126 .cmd = TIPC_NL_BEARER_SET,
127 .doit = tipc_nl_bearer_set,
128 .policy = tipc_nl_policy,
131 .cmd = TIPC_NL_SOCK_GET,
132 .dumpit = tipc_nl_sk_dump,
133 .policy = tipc_nl_policy,
136 .cmd = TIPC_NL_PUBL_GET,
137 .dumpit = tipc_nl_publ_dump,
138 .policy = tipc_nl_policy,
142 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
144 u32 maxattr = tipc_genl_v2_family.maxattr;
146 *attr = tipc_genl_v2_family.attrbuf;
150 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
153 int tipc_netlink_start(void)
157 res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
159 pr_err("Failed to register legacy interface\n");
163 res = genl_register_family_with_ops(&tipc_genl_v2_family,
166 pr_err("Failed to register netlink interface\n");
172 void tipc_netlink_stop(void)
174 genl_unregister_family(&tipc_genl_family);
175 genl_unregister_family(&tipc_genl_v2_family);