blob: 876f4c6a2631b35eba2b9927430b30c34d125c87 [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/config.c: TIPC configuration management code
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 2002-2006, Ericsson AB
Ying Xue7d0ab172013-06-17 10:54:41 -04005 * Copyright (c) 2004-2007, 2010-2013, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -040038#include "socket.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "name_table.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010040#include "config.h"
Ying Xue7d0ab172013-06-17 10:54:41 -040041#include "server.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010042
Erik Hugnedc1aed32012-06-29 00:50:23 -040043#define REPLY_TRUNCATED "<truncated>\n"
44
Per Lidenb97bf3f2006-01-02 19:04:38 +010045static const void *req_tlv_area; /* request message TLV area */
46static int req_tlv_space; /* request message TLV area size */
47static int rep_headroom; /* reply message headroom to use */
48
Per Liden4323add2006-01-18 00:38:21 +010049struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
Per Lidenb97bf3f2006-01-02 19:04:38 +010050{
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
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090059int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
Per Liden4323add2006-01-18 00:38:21 +010060 void *tlv_data, int tlv_data_size)
Per Lidenb97bf3f2006-01-02 19:04:38 +010061{
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -070062 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
Per Lidenb97bf3f2006-01-02 19:04:38 +010063 int new_tlv_space = TLV_SPACE(tlv_data_size);
64
Allan Stephensb29f1422010-12-31 18:59:25 +000065 if (skb_tailroom(buf) < new_tlv_space)
Per Lidenb97bf3f2006-01-02 19:04:38 +010066 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +010067 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
stephen hemminger31e3c3f2010-10-13 13:20:35 +000075static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
Per Lidenb97bf3f2006-01-02 19:04:38 +010076{
77 struct sk_buff *buf;
Al Viro3e6c8cd2006-11-08 00:19:09 -080078 __be32 value_net;
Per Lidenb97bf3f2006-01-02 19:04:38 +010079
Per Liden4323add2006-01-18 00:38:21 +010080 buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
Per Lidenb97bf3f2006-01-02 19:04:38 +010081 if (buf) {
82 value_net = htonl(value);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090083 tipc_cfg_append_tlv(buf, tlv_type, &value_net,
Per Liden4323add2006-01-18 00:38:21 +010084 sizeof(value_net));
Per Lidenb97bf3f2006-01-02 19:04:38 +010085 }
86 return buf;
87}
88
stephen hemminger31e3c3f2010-10-13 13:20:35 +000089static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
90{
91 return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
92}
93
Per Liden4323add2006-01-18 00:38:21 +010094struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
Per Lidenb97bf3f2006-01-02 19:04:38 +010095{
96 struct sk_buff *buf;
97 int string_len = strlen(string) + 1;
98
Per Liden4323add2006-01-18 00:38:21 +010099 buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100100 if (buf)
Per Liden4323add2006-01-18 00:38:21 +0100101 tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100102 return buf;
103}
104
Allan Stephens107e7be2010-05-11 14:30:08 +0000105static struct sk_buff *tipc_show_stats(void)
106{
107 struct sk_buff *buf;
108 struct tlv_desc *rep_tlv;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400109 char *pb;
110 int pb_len;
Allan Stephens107e7be2010-05-11 14:30:08 +0000111 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
Erik Hugnedc1aed32012-06-29 00:50:23 -0400121 buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
Allan Stephens107e7be2010-05-11 14:30:08 +0000122 if (buf == NULL)
123 return NULL;
124
125 rep_tlv = (struct tlv_desc *)buf->data;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400126 pb = TLV_DATA(rep_tlv);
127 pb_len = ULTRA_STRING_MAX_LEN;
Allan Stephens107e7be2010-05-11 14:30:08 +0000128
Erik Hugnedc1aed32012-06-29 00:50:23 -0400129 str_len = tipc_snprintf(pb, pb_len, "TIPC version " TIPC_MOD_VER "\n");
130 str_len += 1; /* for "\0" */
Allan Stephens107e7be2010-05-11 14:30:08 +0000131 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
Per Lidenb97bf3f2006-01-02 19:04:38 +0100137static 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))
Per Liden4323add2006-01-18 00:38:21 +0100142 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100143
144 args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
145 if (tipc_enable_bearer(args->name,
Allan Stephens50d3e632011-02-28 14:56:15 -0500146 ntohl(args->disc_domain),
Per Lidenb97bf3f2006-01-02 19:04:38 +0100147 ntohl(args->priority)))
Per Liden4323add2006-01-18 00:38:21 +0100148 return tipc_cfg_reply_error_string("unable to enable bearer");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100149
Per Liden4323add2006-01-18 00:38:21 +0100150 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100151}
152
153static struct sk_buff *cfg_disable_bearer(void)
154{
155 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
Per Liden4323add2006-01-18 00:38:21 +0100156 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100157
158 if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
Per Liden4323add2006-01-18 00:38:21 +0100159 return tipc_cfg_reply_error_string("unable to disable bearer");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100160
Per Liden4323add2006-01-18 00:38:21 +0100161 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100162}
163
164static 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))
Per Liden4323add2006-01-18 00:38:21 +0100169 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100170
Al Viro3e6c8cd2006-11-08 00:19:09 -0800171 addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100172 if (addr == tipc_own_addr)
Per Liden4323add2006-01-18 00:38:21 +0100173 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)");
Allan Stephensb58343f2011-11-08 13:48:28 -0500177 if (tipc_own_addr)
Per Liden4323add2006-01-18 00:38:21 +0100178 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
179 " (cannot change node address once assigned)");
Ying Xueeb8b00f2014-05-05 08:56:16 +0800180 if (!tipc_net_start(addr))
181 return tipc_cfg_reply_none();
182
183 return tipc_cfg_reply_error_string("cannot change to network mode");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100184}
185
Per Lidenb97bf3f2006-01-02 19:04:38 +0100186static struct sk_buff *cfg_set_max_ports(void)
187{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100188 u32 value;
189
190 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100191 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800192 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700193 if (value == tipc_max_ports)
194 return tipc_cfg_reply_none();
Paul Gortmaker732efba2012-02-23 15:44:08 -0500195 if (value < 127 || value > 65535)
Per Liden4323add2006-01-18 00:38:21 +0100196 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
197 " (max ports must be 127-65535)");
Allan Stephens077a26f2011-11-08 13:18:59 -0500198 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
199 " (cannot change max ports while TIPC is active)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100200}
201
Per Lidenb97bf3f2006-01-02 19:04:38 +0100202static 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))
Per Liden4323add2006-01-18 00:38:21 +0100207 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800208 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700209 if (value == tipc_net_id)
210 return tipc_cfg_reply_none();
Paul Gortmaker732efba2012-02-23 15:44:08 -0500211 if (value < 1 || value > 9999)
Per Liden4323add2006-01-18 00:38:21 +0100212 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
213 " (network id must be 1-9999)");
Allan Stephensb58343f2011-11-08 13:48:28 -0500214 if (tipc_own_addr)
Per Liden4323add2006-01-18 00:38:21 +0100215 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
Allan Stephense100ae92006-06-25 23:51:08 -0700216 " (cannot change network id once TIPC has joined a network)");
217 tipc_net_id = value;
218 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100219}
220
Per Liden4323add2006-01-18 00:38:21 +0100221struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
222 int request_space, int reply_headroom)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100223{
224 struct sk_buff *rep_tlv_buf;
225
Ying Xueef13a262014-04-21 10:55:42 +0800226 rtnl_lock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100227
228 /* Save request and reply details in a well-known location */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100229 req_tlv_area = request_area;
230 req_tlv_space = request_space;
231 rep_headroom = reply_headroom;
232
233 /* Check command authorization */
Allan Stephens9d52ce42012-04-18 09:42:56 -0400234 if (likely(in_own_node(orig_node))) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100235 /* command is permitted */
Ying Xue59023852014-03-27 12:54:31 +0800236 } else {
Per Liden4323add2006-01-18 00:38:21 +0100237 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
238 " (cannot be done remotely)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100239 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100240 }
241
242 /* Call appropriate processing routine */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100243 switch (cmd) {
244 case TIPC_CMD_NOOP:
Per Liden4323add2006-01-18 00:38:21 +0100245 rep_tlv_buf = tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100246 break;
247 case TIPC_CMD_GET_NODES:
Per Liden4323add2006-01-18 00:38:21 +0100248 rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100249 break;
250 case TIPC_CMD_GET_LINKS:
Per Liden4323add2006-01-18 00:38:21 +0100251 rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100252 break;
253 case TIPC_CMD_SHOW_LINK_STATS:
Per Liden4323add2006-01-18 00:38:21 +0100254 rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100255 break;
256 case TIPC_CMD_RESET_LINK_STATS:
Per Liden4323add2006-01-18 00:38:21 +0100257 rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100258 break;
259 case TIPC_CMD_SHOW_NAME_TABLE:
Per Liden4323add2006-01-18 00:38:21 +0100260 rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100261 break;
262 case TIPC_CMD_GET_BEARER_NAMES:
Per Liden4323add2006-01-18 00:38:21 +0100263 rep_tlv_buf = tipc_bearer_get_names();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100264 break;
265 case TIPC_CMD_GET_MEDIA_NAMES:
Per Liden4323add2006-01-18 00:38:21 +0100266 rep_tlv_buf = tipc_media_get_names();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100267 break;
268 case TIPC_CMD_SHOW_PORTS:
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -0400269 rep_tlv_buf = tipc_sk_socks_show();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100270 break;
Allan Stephens107e7be2010-05-11 14:30:08 +0000271 case TIPC_CMD_SHOW_STATS:
272 rep_tlv_buf = tipc_show_stats();
273 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100274 case TIPC_CMD_SET_LINK_TOL:
275 case TIPC_CMD_SET_LINK_PRI:
276 case TIPC_CMD_SET_LINK_WINDOW:
Per Liden4323add2006-01-18 00:38:21 +0100277 rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100278 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;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 case TIPC_CMD_SET_MAX_PORTS:
289 rep_tlv_buf = cfg_set_max_ports();
290 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100291 case TIPC_CMD_SET_NETID:
292 rep_tlv_buf = cfg_set_netid();
293 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100294 case TIPC_CMD_GET_MAX_PORTS:
Per Liden4323add2006-01-18 00:38:21 +0100295 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100296 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100297 case TIPC_CMD_GET_NETID:
Per Liden4323add2006-01-18 00:38:21 +0100298 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100299 break;
Allan Stephens59f0c452008-05-21 14:52:30 -0700300 case TIPC_CMD_NOT_NET_ADMIN:
301 rep_tlv_buf =
302 tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
303 break;
Allan Stephens51f98a82010-12-31 18:59:16 +0000304 case TIPC_CMD_SET_MAX_ZONES:
305 case TIPC_CMD_GET_MAX_ZONES:
Allan Stephens08c80e92010-12-31 18:59:17 +0000306 case TIPC_CMD_SET_MAX_SLAVES:
307 case TIPC_CMD_GET_MAX_SLAVES:
Allan Stephens8f92df62010-12-31 18:59:19 +0000308 case TIPC_CMD_SET_MAX_CLUSTERS:
309 case TIPC_CMD_GET_MAX_CLUSTERS:
Allan Stephensf831c962011-02-25 14:22:11 -0500310 case TIPC_CMD_SET_MAX_NODES:
311 case TIPC_CMD_GET_MAX_NODES:
Ying Xue34f256c2012-08-16 12:09:13 +0000312 case TIPC_CMD_SET_MAX_SUBSCR:
313 case TIPC_CMD_GET_MAX_SUBSCR:
Ying Xuee6a04b12012-08-16 12:09:14 +0000314 case TIPC_CMD_SET_MAX_PUBL:
315 case TIPC_CMD_GET_MAX_PUBL:
Erik Hugne869dd462012-06-29 00:50:24 -0400316 case TIPC_CMD_SET_LOG_SIZE:
Ying Xue59023852014-03-27 12:54:31 +0800317 case TIPC_CMD_SET_REMOTE_MNG:
318 case TIPC_CMD_GET_REMOTE_MNG:
Erik Hugne869dd462012-06-29 00:50:24 -0400319 case TIPC_CMD_DUMP_LOG:
Allan Stephens51f98a82010-12-31 18:59:16 +0000320 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
321 " (obsolete command)");
322 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100323 default:
Allan Stephens53cfd1e2006-10-16 22:00:56 -0700324 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
325 " (unknown command)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100326 break;
327 }
328
Erik Hugnedc1aed32012-06-29 00:50:23 -0400329 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
Per Lidenb97bf3f2006-01-02 19:04:38 +0100338 /* Return reply buffer */
339exit:
Ying Xueef13a262014-04-21 10:55:42 +0800340 rtnl_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100341 return rep_tlv_buf;
342}