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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42 #include <net/genetlink.h>
44 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
46 struct sk_buff *rep_buf;
47 struct nlmsghdr *rep_nlh;
48 struct nlmsghdr *req_nlh = info->nlhdr;
49 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
50 int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
53 if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
54 cmd = TIPC_CMD_NOT_NET_ADMIN;
56 cmd = req_userhdr->cmd;
58 rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
59 nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
60 nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
64 skb_push(rep_buf, hdr_space);
65 rep_nlh = nlmsg_hdr(rep_buf);
66 memcpy(rep_nlh, req_nlh, hdr_space);
67 rep_nlh->nlmsg_len = rep_buf->len;
68 genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid);
74 static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
75 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, },
76 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, },
77 [TIPC_NLA_SOCK] = { .type = NLA_NESTED, },
78 [TIPC_NLA_PUBL] = { .type = NLA_NESTED, },
79 [TIPC_NLA_LINK] = { .type = NLA_NESTED, },
82 /* Legacy ASCII API */
83 static struct genl_family tipc_genl_family = {
84 .id = GENL_ID_GENERATE,
85 .name = TIPC_GENL_NAME,
86 .version = TIPC_GENL_VERSION,
87 .hdrsize = TIPC_GENL_HDRLEN,
91 /* Legacy ASCII API */
92 static struct genl_ops tipc_genl_ops[] = {
99 /* Users of the legacy API (tipc-config) can't handle that we add operations,
100 * so we have a separate genl handling for the new API.
102 struct genl_family tipc_genl_v2_family = {
103 .id = GENL_ID_GENERATE,
104 .name = TIPC_GENL_V2_NAME,
105 .version = TIPC_GENL_V2_VERSION,
107 .maxattr = TIPC_NLA_MAX,
110 static const struct genl_ops tipc_genl_v2_ops[] = {
112 .cmd = TIPC_NL_BEARER_DISABLE,
113 .doit = tipc_nl_bearer_disable,
114 .policy = tipc_nl_policy,
117 .cmd = TIPC_NL_BEARER_ENABLE,
118 .doit = tipc_nl_bearer_enable,
119 .policy = tipc_nl_policy,
122 .cmd = TIPC_NL_BEARER_GET,
123 .doit = tipc_nl_bearer_get,
124 .dumpit = tipc_nl_bearer_dump,
125 .policy = tipc_nl_policy,
128 .cmd = TIPC_NL_BEARER_SET,
129 .doit = tipc_nl_bearer_set,
130 .policy = tipc_nl_policy,
133 .cmd = TIPC_NL_SOCK_GET,
134 .dumpit = tipc_nl_sk_dump,
135 .policy = tipc_nl_policy,
138 .cmd = TIPC_NL_PUBL_GET,
139 .dumpit = tipc_nl_publ_dump,
140 .policy = tipc_nl_policy,
143 .cmd = TIPC_NL_LINK_GET,
144 .doit = tipc_nl_link_get,
145 .dumpit = tipc_nl_link_dump,
146 .policy = tipc_nl_policy,
150 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
152 u32 maxattr = tipc_genl_v2_family.maxattr;
154 *attr = tipc_genl_v2_family.attrbuf;
158 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
161 int tipc_netlink_start(void)
165 res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
167 pr_err("Failed to register legacy interface\n");
171 res = genl_register_family_with_ops(&tipc_genl_v2_family,
174 pr_err("Failed to register netlink interface\n");
180 void tipc_netlink_stop(void)
182 genl_unregister_family(&tipc_genl_family);
183 genl_unregister_family(&tipc_genl_v2_family);