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, },
80 [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, },
83 /* Legacy ASCII API */
84 static struct genl_family tipc_genl_family = {
85 .id = GENL_ID_GENERATE,
86 .name = TIPC_GENL_NAME,
87 .version = TIPC_GENL_VERSION,
88 .hdrsize = TIPC_GENL_HDRLEN,
92 /* Legacy ASCII API */
93 static struct genl_ops tipc_genl_ops[] = {
100 /* Users of the legacy API (tipc-config) can't handle that we add operations,
101 * so we have a separate genl handling for the new API.
103 struct genl_family tipc_genl_v2_family = {
104 .id = GENL_ID_GENERATE,
105 .name = TIPC_GENL_V2_NAME,
106 .version = TIPC_GENL_V2_VERSION,
108 .maxattr = TIPC_NLA_MAX,
111 static const struct genl_ops tipc_genl_v2_ops[] = {
113 .cmd = TIPC_NL_BEARER_DISABLE,
114 .doit = tipc_nl_bearer_disable,
115 .policy = tipc_nl_policy,
118 .cmd = TIPC_NL_BEARER_ENABLE,
119 .doit = tipc_nl_bearer_enable,
120 .policy = tipc_nl_policy,
123 .cmd = TIPC_NL_BEARER_GET,
124 .doit = tipc_nl_bearer_get,
125 .dumpit = tipc_nl_bearer_dump,
126 .policy = tipc_nl_policy,
129 .cmd = TIPC_NL_BEARER_SET,
130 .doit = tipc_nl_bearer_set,
131 .policy = tipc_nl_policy,
134 .cmd = TIPC_NL_SOCK_GET,
135 .dumpit = tipc_nl_sk_dump,
136 .policy = tipc_nl_policy,
139 .cmd = TIPC_NL_PUBL_GET,
140 .dumpit = tipc_nl_publ_dump,
141 .policy = tipc_nl_policy,
144 .cmd = TIPC_NL_LINK_GET,
145 .doit = tipc_nl_link_get,
146 .dumpit = tipc_nl_link_dump,
147 .policy = tipc_nl_policy,
150 .cmd = TIPC_NL_LINK_SET,
151 .doit = tipc_nl_link_set,
152 .policy = tipc_nl_policy,
155 .cmd = TIPC_NL_LINK_RESET_STATS,
156 .doit = tipc_nl_link_reset_stats,
157 .policy = tipc_nl_policy,
160 .cmd = TIPC_NL_MEDIA_GET,
161 .doit = tipc_nl_media_get,
162 .dumpit = tipc_nl_media_dump,
163 .policy = tipc_nl_policy,
167 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
169 u32 maxattr = tipc_genl_v2_family.maxattr;
171 *attr = tipc_genl_v2_family.attrbuf;
175 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
178 int tipc_netlink_start(void)
182 res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
184 pr_err("Failed to register legacy interface\n");
188 res = genl_register_family_with_ops(&tipc_genl_v2_family,
191 pr_err("Failed to register netlink interface\n");
197 void tipc_netlink_stop(void)
199 genl_unregister_family(&tipc_genl_family);
200 genl_unregister_family(&tipc_genl_v2_family);