2 * net/tipc/config.c: TIPC configuration management code
4 * Copyright (c) 2002-2006, Ericsson AB
5 * Copyright (c) 2004-2007, 2010-2013, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
39 #include "name_table.h"
43 #define REPLY_TRUNCATED "<truncated>\n"
45 static const void *req_tlv_area; /* request message TLV area */
46 static int req_tlv_space; /* request message TLV area size */
47 static int rep_headroom; /* reply message headroom to use */
49 struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
53 buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
55 skb_reserve(buf, rep_headroom);
59 int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
60 void *tlv_data, int tlv_data_size)
62 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
63 int new_tlv_space = TLV_SPACE(tlv_data_size);
65 if (skb_tailroom(buf) < new_tlv_space)
67 skb_put(buf, new_tlv_space);
68 tlv->tlv_type = htons(tlv_type);
69 tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
70 if (tlv_data_size && tlv_data)
71 memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
75 static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
80 buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
82 value_net = htonl(value);
83 tipc_cfg_append_tlv(buf, tlv_type, &value_net,
89 static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
91 return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
94 struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
97 int string_len = strlen(string) + 1;
99 buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
101 tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
105 static struct sk_buff *tipc_show_stats(void)
108 struct tlv_desc *rep_tlv;
114 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
115 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
117 value = ntohl(*(u32 *)TLV_DATA(req_tlv_area));
119 return tipc_cfg_reply_error_string("unsupported argument");
121 buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
125 rep_tlv = (struct tlv_desc *)buf->data;
126 pb = TLV_DATA(rep_tlv);
127 pb_len = ULTRA_STRING_MAX_LEN;
129 str_len = tipc_snprintf(pb, pb_len, "TIPC version " TIPC_MOD_VER "\n");
130 str_len += 1; /* for "\0" */
131 skb_put(buf, TLV_SPACE(str_len));
132 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
137 static struct sk_buff *cfg_enable_bearer(struct net *net)
139 struct tipc_bearer_config *args;
141 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
142 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
144 args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
145 if (tipc_enable_bearer(net, args->name,
146 ntohl(args->disc_domain),
147 ntohl(args->priority)))
148 return tipc_cfg_reply_error_string("unable to enable bearer");
150 return tipc_cfg_reply_none();
153 static struct sk_buff *cfg_disable_bearer(struct net *net)
155 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
156 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
158 if (tipc_disable_bearer(net, (char *)TLV_DATA(req_tlv_area)))
159 return tipc_cfg_reply_error_string("unable to disable bearer");
161 return tipc_cfg_reply_none();
164 static struct sk_buff *cfg_set_own_addr(struct net *net)
166 struct tipc_net *tn = net_generic(net, tipc_net_id);
169 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
170 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
172 addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
173 if (addr == tn->own_addr)
174 return tipc_cfg_reply_none();
175 if (!tipc_addr_node_valid(addr))
176 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
179 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
180 " (cannot change node address once assigned)");
181 if (!tipc_net_start(net, addr))
182 return tipc_cfg_reply_none();
184 return tipc_cfg_reply_error_string("cannot change to network mode");
187 static struct sk_buff *cfg_set_netid(struct net *net)
189 struct tipc_net *tn = net_generic(net, tipc_net_id);
192 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
193 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
194 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
195 if (value == tn->net_id)
196 return tipc_cfg_reply_none();
197 if (value < 1 || value > 9999)
198 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
199 " (network id must be 1-9999)");
201 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
202 " (cannot change network id once TIPC has joined a network)");
204 return tipc_cfg_reply_none();
207 struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd,
208 const void *request_area, int request_space,
211 struct sk_buff *rep_tlv_buf;
212 struct tipc_net *tn = net_generic(net, tipc_net_id);
216 /* Save request and reply details in a well-known location */
217 req_tlv_area = request_area;
218 req_tlv_space = request_space;
219 rep_headroom = reply_headroom;
221 /* Check command authorization */
222 if (likely(in_own_node(net, orig_node))) {
223 /* command is permitted */
225 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
226 " (cannot be done remotely)");
230 /* Call appropriate processing routine */
233 rep_tlv_buf = tipc_cfg_reply_none();
235 case TIPC_CMD_GET_NODES:
236 rep_tlv_buf = tipc_node_get_nodes(net, req_tlv_area,
239 case TIPC_CMD_GET_LINKS:
240 rep_tlv_buf = tipc_node_get_links(net, req_tlv_area,
243 case TIPC_CMD_SHOW_LINK_STATS:
244 rep_tlv_buf = tipc_link_cmd_show_stats(net, req_tlv_area,
247 case TIPC_CMD_RESET_LINK_STATS:
248 rep_tlv_buf = tipc_link_cmd_reset_stats(net, req_tlv_area,
251 case TIPC_CMD_SHOW_NAME_TABLE:
252 rep_tlv_buf = tipc_nametbl_get(net, req_tlv_area,
255 case TIPC_CMD_GET_BEARER_NAMES:
256 rep_tlv_buf = tipc_bearer_get_names(net);
258 case TIPC_CMD_GET_MEDIA_NAMES:
259 rep_tlv_buf = tipc_media_get_names();
261 case TIPC_CMD_SHOW_PORTS:
262 rep_tlv_buf = tipc_sk_socks_show(net);
264 case TIPC_CMD_SHOW_STATS:
265 rep_tlv_buf = tipc_show_stats();
267 case TIPC_CMD_SET_LINK_TOL:
268 case TIPC_CMD_SET_LINK_PRI:
269 case TIPC_CMD_SET_LINK_WINDOW:
270 rep_tlv_buf = tipc_link_cmd_config(net, req_tlv_area,
273 case TIPC_CMD_ENABLE_BEARER:
274 rep_tlv_buf = cfg_enable_bearer(net);
276 case TIPC_CMD_DISABLE_BEARER:
277 rep_tlv_buf = cfg_disable_bearer(net);
279 case TIPC_CMD_SET_NODE_ADDR:
280 rep_tlv_buf = cfg_set_own_addr(net);
282 case TIPC_CMD_SET_NETID:
283 rep_tlv_buf = cfg_set_netid(net);
285 case TIPC_CMD_GET_NETID:
286 rep_tlv_buf = tipc_cfg_reply_unsigned(tn->net_id);
288 case TIPC_CMD_NOT_NET_ADMIN:
290 tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
292 case TIPC_CMD_SET_MAX_ZONES:
293 case TIPC_CMD_GET_MAX_ZONES:
294 case TIPC_CMD_SET_MAX_SLAVES:
295 case TIPC_CMD_GET_MAX_SLAVES:
296 case TIPC_CMD_SET_MAX_CLUSTERS:
297 case TIPC_CMD_GET_MAX_CLUSTERS:
298 case TIPC_CMD_SET_MAX_NODES:
299 case TIPC_CMD_GET_MAX_NODES:
300 case TIPC_CMD_SET_MAX_SUBSCR:
301 case TIPC_CMD_GET_MAX_SUBSCR:
302 case TIPC_CMD_SET_MAX_PUBL:
303 case TIPC_CMD_GET_MAX_PUBL:
304 case TIPC_CMD_SET_LOG_SIZE:
305 case TIPC_CMD_SET_REMOTE_MNG:
306 case TIPC_CMD_GET_REMOTE_MNG:
307 case TIPC_CMD_DUMP_LOG:
308 case TIPC_CMD_SET_MAX_PORTS:
309 case TIPC_CMD_GET_MAX_PORTS:
310 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
311 " (obsolete command)");
314 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
315 " (unknown command)");
319 WARN_ON(rep_tlv_buf->len > TLV_SPACE(ULTRA_STRING_MAX_LEN));
321 /* Append an error message if we cannot return all requested data */
322 if (rep_tlv_buf->len == TLV_SPACE(ULTRA_STRING_MAX_LEN)) {
323 if (*(rep_tlv_buf->data + ULTRA_STRING_MAX_LEN) != '\0')
324 sprintf(rep_tlv_buf->data + rep_tlv_buf->len -
325 sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED);
328 /* Return reply buffer */