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
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
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
)
168 if (!TLV_CHECK(req_tlv_area
, req_tlv_space
, TIPC_TLV_NET_ADDR
))
169 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR
);
171 addr
= ntohl(*(__be32
*)TLV_DATA(req_tlv_area
));
172 if (addr
== tipc_own_addr
)
173 return tipc_cfg_reply_none();
174 if (!tipc_addr_node_valid(addr
))
175 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
178 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
179 " (cannot change node address once assigned)");
180 if (!tipc_net_start(net
, addr
))
181 return tipc_cfg_reply_none();
183 return tipc_cfg_reply_error_string("cannot change to network mode");
186 static struct sk_buff
*cfg_set_netid(struct net
*net
)
188 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
191 if (!TLV_CHECK(req_tlv_area
, req_tlv_space
, TIPC_TLV_UNSIGNED
))
192 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR
);
193 value
= ntohl(*(__be32
*)TLV_DATA(req_tlv_area
));
194 if (value
== tn
->net_id
)
195 return tipc_cfg_reply_none();
196 if (value
< 1 || value
> 9999)
197 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
198 " (network id must be 1-9999)");
200 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
201 " (cannot change network id once TIPC has joined a network)");
203 return tipc_cfg_reply_none();
206 struct sk_buff
*tipc_cfg_do_cmd(struct net
*net
, u32 orig_node
, u16 cmd
,
207 const void *request_area
, int request_space
,
210 struct sk_buff
*rep_tlv_buf
;
211 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
215 /* Save request and reply details in a well-known location */
216 req_tlv_area
= request_area
;
217 req_tlv_space
= request_space
;
218 rep_headroom
= reply_headroom
;
220 /* Check command authorization */
221 if (likely(in_own_node(orig_node
))) {
222 /* command is permitted */
224 rep_tlv_buf
= tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
225 " (cannot be done remotely)");
229 /* Call appropriate processing routine */
232 rep_tlv_buf
= tipc_cfg_reply_none();
234 case TIPC_CMD_GET_NODES
:
235 rep_tlv_buf
= tipc_node_get_nodes(net
, req_tlv_area
,
238 case TIPC_CMD_GET_LINKS
:
239 rep_tlv_buf
= tipc_node_get_links(net
, req_tlv_area
,
242 case TIPC_CMD_SHOW_LINK_STATS
:
243 rep_tlv_buf
= tipc_link_cmd_show_stats(net
, req_tlv_area
,
246 case TIPC_CMD_RESET_LINK_STATS
:
247 rep_tlv_buf
= tipc_link_cmd_reset_stats(net
, req_tlv_area
,
250 case TIPC_CMD_SHOW_NAME_TABLE
:
251 rep_tlv_buf
= tipc_nametbl_get(net
, req_tlv_area
,
254 case TIPC_CMD_GET_BEARER_NAMES
:
255 rep_tlv_buf
= tipc_bearer_get_names(net
);
257 case TIPC_CMD_GET_MEDIA_NAMES
:
258 rep_tlv_buf
= tipc_media_get_names();
260 case TIPC_CMD_SHOW_PORTS
:
261 rep_tlv_buf
= tipc_sk_socks_show(net
);
263 case TIPC_CMD_SHOW_STATS
:
264 rep_tlv_buf
= tipc_show_stats();
266 case TIPC_CMD_SET_LINK_TOL
:
267 case TIPC_CMD_SET_LINK_PRI
:
268 case TIPC_CMD_SET_LINK_WINDOW
:
269 rep_tlv_buf
= tipc_link_cmd_config(net
, req_tlv_area
,
272 case TIPC_CMD_ENABLE_BEARER
:
273 rep_tlv_buf
= cfg_enable_bearer(net
);
275 case TIPC_CMD_DISABLE_BEARER
:
276 rep_tlv_buf
= cfg_disable_bearer(net
);
278 case TIPC_CMD_SET_NODE_ADDR
:
279 rep_tlv_buf
= cfg_set_own_addr(net
);
281 case TIPC_CMD_SET_NETID
:
282 rep_tlv_buf
= cfg_set_netid(net
);
284 case TIPC_CMD_GET_NETID
:
285 rep_tlv_buf
= tipc_cfg_reply_unsigned(tn
->net_id
);
287 case TIPC_CMD_NOT_NET_ADMIN
:
289 tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN
);
291 case TIPC_CMD_SET_MAX_ZONES
:
292 case TIPC_CMD_GET_MAX_ZONES
:
293 case TIPC_CMD_SET_MAX_SLAVES
:
294 case TIPC_CMD_GET_MAX_SLAVES
:
295 case TIPC_CMD_SET_MAX_CLUSTERS
:
296 case TIPC_CMD_GET_MAX_CLUSTERS
:
297 case TIPC_CMD_SET_MAX_NODES
:
298 case TIPC_CMD_GET_MAX_NODES
:
299 case TIPC_CMD_SET_MAX_SUBSCR
:
300 case TIPC_CMD_GET_MAX_SUBSCR
:
301 case TIPC_CMD_SET_MAX_PUBL
:
302 case TIPC_CMD_GET_MAX_PUBL
:
303 case TIPC_CMD_SET_LOG_SIZE
:
304 case TIPC_CMD_SET_REMOTE_MNG
:
305 case TIPC_CMD_GET_REMOTE_MNG
:
306 case TIPC_CMD_DUMP_LOG
:
307 case TIPC_CMD_SET_MAX_PORTS
:
308 case TIPC_CMD_GET_MAX_PORTS
:
309 rep_tlv_buf
= tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
310 " (obsolete command)");
313 rep_tlv_buf
= tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
314 " (unknown command)");
318 WARN_ON(rep_tlv_buf
->len
> TLV_SPACE(ULTRA_STRING_MAX_LEN
));
320 /* Append an error message if we cannot return all requested data */
321 if (rep_tlv_buf
->len
== TLV_SPACE(ULTRA_STRING_MAX_LEN
)) {
322 if (*(rep_tlv_buf
->data
+ ULTRA_STRING_MAX_LEN
) != '\0')
323 sprintf(rep_tlv_buf
->data
+ rep_tlv_buf
->len
-
324 sizeof(REPLY_TRUNCATED
) - 1, REPLY_TRUNCATED
);
327 /* Return reply buffer */