Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/config.c: TIPC configuration management code | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 2002-2006, Ericsson AB |
7d0ab17b | 5 | * Copyright (c) 2004-2007, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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. | |
23 | * | |
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 | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
5a9ee0be | 38 | #include "socket.h" |
b97bf3fd | 39 | #include "name_table.h" |
b97bf3fd | 40 | #include "config.h" |
7d0ab17b | 41 | #include "server.h" |
b97bf3fd | 42 | |
dc1aed37 EH |
43 | #define REPLY_TRUNCATED "<truncated>\n" |
44 | ||
b97bf3fd PL |
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 */ | |
48 | ||
4323add6 | 49 | struct sk_buff *tipc_cfg_reply_alloc(int payload_size) |
b97bf3fd PL |
50 | { |
51 | struct sk_buff *buf; | |
52 | ||
53 | buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC); | |
54 | if (buf) | |
55 | skb_reserve(buf, rep_headroom); | |
56 | return buf; | |
57 | } | |
58 | ||
c4307285 | 59 | int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type, |
4323add6 | 60 | void *tlv_data, int tlv_data_size) |
b97bf3fd | 61 | { |
27a884dc | 62 | struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf); |
b97bf3fd PL |
63 | int new_tlv_space = TLV_SPACE(tlv_data_size); |
64 | ||
b29f1428 | 65 | if (skb_tailroom(buf) < new_tlv_space) |
b97bf3fd | 66 | return 0; |
b97bf3fd PL |
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); | |
72 | return 1; | |
73 | } | |
74 | ||
31e3c3f6 | 75 | static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value) |
b97bf3fd PL |
76 | { |
77 | struct sk_buff *buf; | |
3e6c8cd5 | 78 | __be32 value_net; |
b97bf3fd | 79 | |
4323add6 | 80 | buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value))); |
b97bf3fd PL |
81 | if (buf) { |
82 | value_net = htonl(value); | |
c4307285 | 83 | tipc_cfg_append_tlv(buf, tlv_type, &value_net, |
4323add6 | 84 | sizeof(value_net)); |
b97bf3fd PL |
85 | } |
86 | return buf; | |
87 | } | |
88 | ||
31e3c3f6 | 89 | static struct sk_buff *tipc_cfg_reply_unsigned(u32 value) |
90 | { | |
91 | return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value); | |
92 | } | |
93 | ||
4323add6 | 94 | struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string) |
b97bf3fd PL |
95 | { |
96 | struct sk_buff *buf; | |
97 | int string_len = strlen(string) + 1; | |
98 | ||
4323add6 | 99 | buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len)); |
b97bf3fd | 100 | if (buf) |
4323add6 | 101 | tipc_cfg_append_tlv(buf, tlv_type, string, string_len); |
b97bf3fd PL |
102 | return buf; |
103 | } | |
104 | ||
107e7be6 AS |
105 | static struct sk_buff *tipc_show_stats(void) |
106 | { | |
107 | struct sk_buff *buf; | |
108 | struct tlv_desc *rep_tlv; | |
dc1aed37 EH |
109 | char *pb; |
110 | int pb_len; | |
107e7be6 AS |
111 | int str_len; |
112 | u32 value; | |
113 | ||
114 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
115 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
116 | ||
117 | value = ntohl(*(u32 *)TLV_DATA(req_tlv_area)); | |
118 | if (value != 0) | |
119 | return tipc_cfg_reply_error_string("unsupported argument"); | |
120 | ||
dc1aed37 | 121 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
107e7be6 AS |
122 | if (buf == NULL) |
123 | return NULL; | |
124 | ||
125 | rep_tlv = (struct tlv_desc *)buf->data; | |
dc1aed37 EH |
126 | pb = TLV_DATA(rep_tlv); |
127 | pb_len = ULTRA_STRING_MAX_LEN; | |
107e7be6 | 128 | |
dc1aed37 EH |
129 | str_len = tipc_snprintf(pb, pb_len, "TIPC version " TIPC_MOD_VER "\n"); |
130 | str_len += 1; /* for "\0" */ | |
107e7be6 AS |
131 | skb_put(buf, TLV_SPACE(str_len)); |
132 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
133 | ||
134 | return buf; | |
135 | } | |
136 | ||
b97bf3fd PL |
137 | static struct sk_buff *cfg_enable_bearer(void) |
138 | { | |
139 | struct tipc_bearer_config *args; | |
140 | ||
141 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG)) | |
4323add6 | 142 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
143 | |
144 | args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area); | |
145 | if (tipc_enable_bearer(args->name, | |
50d3e639 | 146 | ntohl(args->disc_domain), |
b97bf3fd | 147 | ntohl(args->priority))) |
4323add6 | 148 | return tipc_cfg_reply_error_string("unable to enable bearer"); |
b97bf3fd | 149 | |
4323add6 | 150 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
151 | } |
152 | ||
153 | static struct sk_buff *cfg_disable_bearer(void) | |
154 | { | |
155 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME)) | |
4323add6 | 156 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
157 | |
158 | if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area))) | |
4323add6 | 159 | return tipc_cfg_reply_error_string("unable to disable bearer"); |
b97bf3fd | 160 | |
4323add6 | 161 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
162 | } |
163 | ||
164 | static struct sk_buff *cfg_set_own_addr(void) | |
165 | { | |
166 | u32 addr; | |
167 | ||
168 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) | |
4323add6 | 169 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 170 | |
3e6c8cd5 | 171 | addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 172 | if (addr == tipc_own_addr) |
4323add6 PL |
173 | return tipc_cfg_reply_none(); |
174 | if (!tipc_addr_node_valid(addr)) | |
175 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
176 | " (node address)"); | |
b58343f9 | 177 | if (tipc_own_addr) |
4323add6 PL |
178 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
179 | " (cannot change node address once assigned)"); | |
eb8b00f5 YX |
180 | if (!tipc_net_start(addr)) |
181 | return tipc_cfg_reply_none(); | |
182 | ||
183 | return tipc_cfg_reply_error_string("cannot change to network mode"); | |
b97bf3fd PL |
184 | } |
185 | ||
b97bf3fd PL |
186 | static struct sk_buff *cfg_set_max_ports(void) |
187 | { | |
b97bf3fd PL |
188 | u32 value; |
189 | ||
190 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 191 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 192 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
193 | if (value == tipc_max_ports) |
194 | return tipc_cfg_reply_none(); | |
732efba4 | 195 | if (value < 127 || value > 65535) |
4323add6 PL |
196 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
197 | " (max ports must be 127-65535)"); | |
077a26f0 AS |
198 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
199 | " (cannot change max ports while TIPC is active)"); | |
b97bf3fd PL |
200 | } |
201 | ||
b97bf3fd PL |
202 | static struct sk_buff *cfg_set_netid(void) |
203 | { | |
204 | u32 value; | |
205 | ||
206 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 207 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 208 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
209 | if (value == tipc_net_id) |
210 | return tipc_cfg_reply_none(); | |
732efba4 | 211 | if (value < 1 || value > 9999) |
4323add6 PL |
212 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
213 | " (network id must be 1-9999)"); | |
b58343f9 | 214 | if (tipc_own_addr) |
4323add6 | 215 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 AS |
216 | " (cannot change network id once TIPC has joined a network)"); |
217 | tipc_net_id = value; | |
218 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
219 | } |
220 | ||
4323add6 PL |
221 | struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, |
222 | int request_space, int reply_headroom) | |
b97bf3fd PL |
223 | { |
224 | struct sk_buff *rep_tlv_buf; | |
225 | ||
ef13a262 | 226 | rtnl_lock(); |
b97bf3fd PL |
227 | |
228 | /* Save request and reply details in a well-known location */ | |
b97bf3fd PL |
229 | req_tlv_area = request_area; |
230 | req_tlv_space = request_space; | |
231 | rep_headroom = reply_headroom; | |
232 | ||
233 | /* Check command authorization */ | |
9d52ce4b | 234 | if (likely(in_own_node(orig_node))) { |
b97bf3fd | 235 | /* command is permitted */ |
5902385a | 236 | } else { |
4323add6 PL |
237 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
238 | " (cannot be done remotely)"); | |
b97bf3fd | 239 | goto exit; |
b97bf3fd PL |
240 | } |
241 | ||
242 | /* Call appropriate processing routine */ | |
b97bf3fd PL |
243 | switch (cmd) { |
244 | case TIPC_CMD_NOOP: | |
4323add6 | 245 | rep_tlv_buf = tipc_cfg_reply_none(); |
b97bf3fd PL |
246 | break; |
247 | case TIPC_CMD_GET_NODES: | |
4323add6 | 248 | rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
249 | break; |
250 | case TIPC_CMD_GET_LINKS: | |
4323add6 | 251 | rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
252 | break; |
253 | case TIPC_CMD_SHOW_LINK_STATS: | |
4323add6 | 254 | rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
255 | break; |
256 | case TIPC_CMD_RESET_LINK_STATS: | |
4323add6 | 257 | rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
258 | break; |
259 | case TIPC_CMD_SHOW_NAME_TABLE: | |
4323add6 | 260 | rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
261 | break; |
262 | case TIPC_CMD_GET_BEARER_NAMES: | |
4323add6 | 263 | rep_tlv_buf = tipc_bearer_get_names(); |
b97bf3fd PL |
264 | break; |
265 | case TIPC_CMD_GET_MEDIA_NAMES: | |
4323add6 | 266 | rep_tlv_buf = tipc_media_get_names(); |
b97bf3fd PL |
267 | break; |
268 | case TIPC_CMD_SHOW_PORTS: | |
5a9ee0be | 269 | rep_tlv_buf = tipc_sk_socks_show(); |
b97bf3fd | 270 | break; |
107e7be6 AS |
271 | case TIPC_CMD_SHOW_STATS: |
272 | rep_tlv_buf = tipc_show_stats(); | |
273 | break; | |
b97bf3fd PL |
274 | case TIPC_CMD_SET_LINK_TOL: |
275 | case TIPC_CMD_SET_LINK_PRI: | |
276 | case TIPC_CMD_SET_LINK_WINDOW: | |
4323add6 | 277 | rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd); |
b97bf3fd PL |
278 | break; |
279 | case TIPC_CMD_ENABLE_BEARER: | |
280 | rep_tlv_buf = cfg_enable_bearer(); | |
281 | break; | |
282 | case TIPC_CMD_DISABLE_BEARER: | |
283 | rep_tlv_buf = cfg_disable_bearer(); | |
284 | break; | |
285 | case TIPC_CMD_SET_NODE_ADDR: | |
286 | rep_tlv_buf = cfg_set_own_addr(); | |
287 | break; | |
b97bf3fd PL |
288 | case TIPC_CMD_SET_MAX_PORTS: |
289 | rep_tlv_buf = cfg_set_max_ports(); | |
290 | break; | |
b97bf3fd PL |
291 | case TIPC_CMD_SET_NETID: |
292 | rep_tlv_buf = cfg_set_netid(); | |
293 | break; | |
b97bf3fd | 294 | case TIPC_CMD_GET_MAX_PORTS: |
4323add6 | 295 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports); |
b97bf3fd | 296 | break; |
b97bf3fd | 297 | case TIPC_CMD_GET_NETID: |
4323add6 | 298 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id); |
b97bf3fd | 299 | break; |
59f0c452 AS |
300 | case TIPC_CMD_NOT_NET_ADMIN: |
301 | rep_tlv_buf = | |
302 | tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN); | |
303 | break; | |
51f98a8d AS |
304 | case TIPC_CMD_SET_MAX_ZONES: |
305 | case TIPC_CMD_GET_MAX_ZONES: | |
08c80e9a AS |
306 | case TIPC_CMD_SET_MAX_SLAVES: |
307 | case TIPC_CMD_GET_MAX_SLAVES: | |
8f92df6a AS |
308 | case TIPC_CMD_SET_MAX_CLUSTERS: |
309 | case TIPC_CMD_GET_MAX_CLUSTERS: | |
f831c963 AS |
310 | case TIPC_CMD_SET_MAX_NODES: |
311 | case TIPC_CMD_GET_MAX_NODES: | |
34f256cc YX |
312 | case TIPC_CMD_SET_MAX_SUBSCR: |
313 | case TIPC_CMD_GET_MAX_SUBSCR: | |
e6a04b1d YX |
314 | case TIPC_CMD_SET_MAX_PUBL: |
315 | case TIPC_CMD_GET_MAX_PUBL: | |
869dd466 | 316 | case TIPC_CMD_SET_LOG_SIZE: |
5902385a YX |
317 | case TIPC_CMD_SET_REMOTE_MNG: |
318 | case TIPC_CMD_GET_REMOTE_MNG: | |
869dd466 | 319 | case TIPC_CMD_DUMP_LOG: |
51f98a8d AS |
320 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
321 | " (obsolete command)"); | |
322 | break; | |
b97bf3fd | 323 | default: |
53cfd1e1 AS |
324 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
325 | " (unknown command)"); | |
b97bf3fd PL |
326 | break; |
327 | } | |
328 | ||
dc1aed37 EH |
329 | WARN_ON(rep_tlv_buf->len > TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
330 | ||
331 | /* Append an error message if we cannot return all requested data */ | |
332 | if (rep_tlv_buf->len == TLV_SPACE(ULTRA_STRING_MAX_LEN)) { | |
333 | if (*(rep_tlv_buf->data + ULTRA_STRING_MAX_LEN) != '\0') | |
334 | sprintf(rep_tlv_buf->data + rep_tlv_buf->len - | |
335 | sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED); | |
336 | } | |
337 | ||
b97bf3fd PL |
338 | /* Return reply buffer */ |
339 | exit: | |
ef13a262 | 340 | rtnl_unlock(); |
b97bf3fd PL |
341 | return rep_tlv_buf; |
342 | } |