net/tipc/config.c

   1 /*
   2  * net/tipc/config.c: TIPC configuration management code
   3  *
   4  * Copyright (c) 2002-2006, Ericsson AB
   5  * Copyright (c) 2004-2007, Wind River Systems
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  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.
  19  *
  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
  34  * POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #include "core.h"
  38 #include "port.h"
  39 #include "link.h"
  40 #include "name_table.h"
  41 #include "config.h"
  42
  43 static u32 config_port_ref;
  44
  45 static DEFINE_SPINLOCK(config_lock);
  46
  47 static const void *req_tlv_area;        /* request message TLV area */
  48 static int req_tlv_space;               /* request message TLV area size */
  49 static int rep_headroom;                /* reply message headroom to use */
  50
  51
  52 struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
  53 {
  54         struct sk_buff *buf;
  55
  56         buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
  57         if (buf)
  58                 skb_reserve(buf, rep_headroom);
  59         return buf;
  60 }
  61
  62 int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
  63                         void *tlv_data, int tlv_data_size)
  64 {
  65         struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
  66         int new_tlv_space = TLV_SPACE(tlv_data_size);
  67
  68         if (skb_tailroom(buf) < new_tlv_space) {
  69                 dbg("tipc_cfg_append_tlv unable to append TLV\n");
  70                 return 0;
  71         }
  72         skb_put(buf, new_tlv_space);
  73         tlv->tlv_type = htons(tlv_type);
  74         tlv->tlv_len  = htons(TLV_LENGTH(tlv_data_size));
  75         if (tlv_data_size && tlv_data)
  76                 memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
  77         return 1;
  78 }
  79
  80 static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
  81 {
  82         struct sk_buff *buf;
  83         __be32 value_net;
  84
  85         buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
  86         if (buf) {
  87                 value_net = htonl(value);
  88                 tipc_cfg_append_tlv(buf, tlv_type, &value_net,
  89                                     sizeof(value_net));
  90         }
  91         return buf;
  92 }
  93
  94 static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
  95 {
  96         return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
  97 }
  98
  99 struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
 100 {
 101         struct sk_buff *buf;
 102         int string_len = strlen(string) + 1;
 103
 104         buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
 105         if (buf)
 106                 tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
 107         return buf;
 108 }
 109
 110 #define MAX_STATS_INFO 2000
 111
 112 static struct sk_buff *tipc_show_stats(void)
 113 {
 114         struct sk_buff *buf;
 115         struct tlv_desc *rep_tlv;
 116         struct print_buf pb;
 117         int str_len;
 118         u32 value;
 119
 120         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 121                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 122
 123         value = ntohl(*(u32 *)TLV_DATA(req_tlv_area));
 124         if (value != 0)
 125                 return tipc_cfg_reply_error_string("unsupported argument");
 126
 127         buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_STATS_INFO));
 128         if (buf == NULL)
 129                 return NULL;
 130
 131         rep_tlv = (struct tlv_desc *)buf->data;
 132         tipc_printbuf_init(&pb, (char *)TLV_DATA(rep_tlv), MAX_STATS_INFO);
 133
 134         tipc_printf(&pb, "TIPC version " TIPC_MOD_VER "\n");
 135
 136         /* Use additional tipc_printf()'s to return more info ... */
 137
 138         str_len = tipc_printbuf_validate(&pb);
 139         skb_put(buf, TLV_SPACE(str_len));
 140         TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
 141
 142         return buf;
 143 }
 144
 145 static struct sk_buff *cfg_enable_bearer(void)
 146 {
 147         struct tipc_bearer_config *args;
 148
 149         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
 150                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 151
 152         args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
 153         if (tipc_enable_bearer(args->name,
 154                                ntohl(args->detect_scope),
 155                                ntohl(args->priority)))
 156                 return tipc_cfg_reply_error_string("unable to enable bearer");
 157
 158         return tipc_cfg_reply_none();
 159 }
 160
 161 static struct sk_buff *cfg_disable_bearer(void)
 162 {
 163         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
 164                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 165
 166         if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
 167                 return tipc_cfg_reply_error_string("unable to disable bearer");
 168
 169         return tipc_cfg_reply_none();
 170 }
 171
 172 static struct sk_buff *cfg_set_own_addr(void)
 173 {
 174         u32 addr;
 175
 176         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
 177                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 178
 179         addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 180         if (addr == tipc_own_addr)
 181                 return tipc_cfg_reply_none();
 182         if (!tipc_addr_node_valid(addr))
 183                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 184                                                    " (node address)");
 185         if (tipc_mode == TIPC_NET_MODE)
 186                 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 187                                                    " (cannot change node address once assigned)");
 188
 189         /*
 190          * Must release all spinlocks before calling start_net() because
 191          * Linux version of TIPC calls eth_media_start() which calls
 192          * register_netdevice_notifier() which may block!
 193          *
 194          * Temporarily releasing the lock should be harmless for non-Linux TIPC,
 195          * but Linux version of eth_media_start() should really be reworked
 196          * so that it can be called with spinlocks held.
 197          */
 198
 199         spin_unlock_bh(&config_lock);
 200         tipc_core_start_net(addr);
 201         spin_lock_bh(&config_lock);
 202         return tipc_cfg_reply_none();
 203 }
 204
 205 static struct sk_buff *cfg_set_remote_mng(void)
 206 {
 207         u32 value;
 208
 209         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 210                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 211
 212         value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 213         tipc_remote_management = (value != 0);
 214         return tipc_cfg_reply_none();
 215 }
 216
 217 static struct sk_buff *cfg_set_max_publications(void)
 218 {
 219         u32 value;
 220
 221         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 222                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 223
 224         value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 225         if (value != delimit(value, 1, 65535))
 226                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 227                                                    " (max publications must be 1-65535)");
 228         tipc_max_publications = value;
 229         return tipc_cfg_reply_none();
 230 }
 231
 232 static struct sk_buff *cfg_set_max_subscriptions(void)
 233 {
 234         u32 value;
 235
 236         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 237                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 238
 239         value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 240         if (value != delimit(value, 1, 65535))
 241                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 242                                                    " (max subscriptions must be 1-65535");
 243         tipc_max_subscriptions = value;
 244         return tipc_cfg_reply_none();
 245 }
 246
 247 static struct sk_buff *cfg_set_max_ports(void)
 248 {
 249         u32 value;
 250
 251         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 252                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 253         value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 254         if (value == tipc_max_ports)
 255                 return tipc_cfg_reply_none();
 256         if (value != delimit(value, 127, 65535))
 257                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 258                                                    " (max ports must be 127-65535)");
 259         if (tipc_mode != TIPC_NOT_RUNNING)
 260                 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 261                         " (cannot change max ports while TIPC is active)");
 262         tipc_max_ports = value;
 263         return tipc_cfg_reply_none();
 264 }
 265
 266 static struct sk_buff *cfg_set_max_nodes(void)
 267 {
 268         u32 value;
 269
 270         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 271                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 272         value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 273         if (value == tipc_max_nodes)
 274                 return tipc_cfg_reply_none();
 275         if (value != delimit(value, 8, 2047))
 276                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 277                                                    " (max nodes must be 8-2047)");
 278         if (tipc_mode == TIPC_NET_MODE)
 279                 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 280                         " (cannot change max nodes once TIPC has joined a network)");
 281         tipc_max_nodes = value;
 282         return tipc_cfg_reply_none();
 283 }
 284
 285 static struct sk_buff *cfg_set_netid(void)
 286 {
 287         u32 value;
 288
 289         if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
 290                 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
 291         value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
 292         if (value == tipc_net_id)
 293                 return tipc_cfg_reply_none();
 294         if (value != delimit(value, 1, 9999))
 295                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
 296                                                    " (network id must be 1-9999)");
 297         if (tipc_mode == TIPC_NET_MODE)
 298                 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 299                         " (cannot change network id once TIPC has joined a network)");
 300         tipc_net_id = value;
 301         return tipc_cfg_reply_none();
 302 }
 303
 304 struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
 305                                 int request_space, int reply_headroom)
 306 {
 307         struct sk_buff *rep_tlv_buf;
 308
 309         spin_lock_bh(&config_lock);
 310
 311         /* Save request and reply details in a well-known location */
 312
 313         req_tlv_area = request_area;
 314         req_tlv_space = request_space;
 315         rep_headroom = reply_headroom;
 316
 317         /* Check command authorization */
 318
 319         if (likely(orig_node == tipc_own_addr)) {
 320                 /* command is permitted */
 321         } else if (cmd >= 0x8000) {
 322                 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 323                                                           " (cannot be done remotely)");
 324                 goto exit;
 325         } else if (!tipc_remote_management) {
 326                 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE);
 327                 goto exit;
 328         }
 329         else if (cmd >= 0x4000) {
 330                 u32 domain = 0;
 331
 332                 if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) ||
 333                     (domain != orig_node)) {
 334                         rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR);
 335                         goto exit;
 336                 }
 337         }
 338
 339         /* Call appropriate processing routine */
 340
 341         switch (cmd) {
 342         case TIPC_CMD_NOOP:
 343                 rep_tlv_buf = tipc_cfg_reply_none();
 344                 break;
 345         case TIPC_CMD_GET_NODES:
 346                 rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
 347                 break;
 348         case TIPC_CMD_GET_LINKS:
 349                 rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
 350                 break;
 351         case TIPC_CMD_SHOW_LINK_STATS:
 352                 rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
 353                 break;
 354         case TIPC_CMD_RESET_LINK_STATS:
 355                 rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
 356                 break;
 357         case TIPC_CMD_SHOW_NAME_TABLE:
 358                 rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
 359                 break;
 360         case TIPC_CMD_GET_BEARER_NAMES:
 361                 rep_tlv_buf = tipc_bearer_get_names();
 362                 break;
 363         case TIPC_CMD_GET_MEDIA_NAMES:
 364                 rep_tlv_buf = tipc_media_get_names();
 365                 break;
 366         case TIPC_CMD_SHOW_PORTS:
 367                 rep_tlv_buf = tipc_port_get_ports();
 368                 break;
 369         case TIPC_CMD_SET_LOG_SIZE:
 370                 rep_tlv_buf = tipc_log_resize_cmd(req_tlv_area, req_tlv_space);
 371                 break;
 372         case TIPC_CMD_DUMP_LOG:
 373                 rep_tlv_buf = tipc_log_dump();
 374                 break;
 375         case TIPC_CMD_SHOW_STATS:
 376                 rep_tlv_buf = tipc_show_stats();
 377                 break;
 378         case TIPC_CMD_SET_LINK_TOL:
 379         case TIPC_CMD_SET_LINK_PRI:
 380         case TIPC_CMD_SET_LINK_WINDOW:
 381                 rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
 382                 break;
 383         case TIPC_CMD_ENABLE_BEARER:
 384                 rep_tlv_buf = cfg_enable_bearer();
 385                 break;
 386         case TIPC_CMD_DISABLE_BEARER:
 387                 rep_tlv_buf = cfg_disable_bearer();
 388                 break;
 389         case TIPC_CMD_SET_NODE_ADDR:
 390                 rep_tlv_buf = cfg_set_own_addr();
 391                 break;
 392         case TIPC_CMD_SET_REMOTE_MNG:
 393                 rep_tlv_buf = cfg_set_remote_mng();
 394                 break;
 395         case TIPC_CMD_SET_MAX_PORTS:
 396                 rep_tlv_buf = cfg_set_max_ports();
 397                 break;
 398         case TIPC_CMD_SET_MAX_PUBL:
 399                 rep_tlv_buf = cfg_set_max_publications();
 400                 break;
 401         case TIPC_CMD_SET_MAX_SUBSCR:
 402                 rep_tlv_buf = cfg_set_max_subscriptions();
 403                 break;
 404         case TIPC_CMD_SET_MAX_NODES:
 405                 rep_tlv_buf = cfg_set_max_nodes();
 406                 break;
 407         case TIPC_CMD_SET_NETID:
 408                 rep_tlv_buf = cfg_set_netid();
 409                 break;
 410         case TIPC_CMD_GET_REMOTE_MNG:
 411                 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management);
 412                 break;
 413         case TIPC_CMD_GET_MAX_PORTS:
 414                 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
 415                 break;
 416         case TIPC_CMD_GET_MAX_PUBL:
 417                 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications);
 418                 break;
 419         case TIPC_CMD_GET_MAX_SUBSCR:
 420                 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions);
 421                 break;
 422         case TIPC_CMD_GET_MAX_NODES:
 423                 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes);
 424                 break;
 425         case TIPC_CMD_GET_NETID:
 426                 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
 427                 break;
 428         case TIPC_CMD_NOT_NET_ADMIN:
 429                 rep_tlv_buf =
 430                         tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
 431                 break;
 432         case TIPC_CMD_SET_MAX_ZONES:
 433         case TIPC_CMD_GET_MAX_ZONES:
 434         case TIPC_CMD_SET_MAX_SLAVES:
 435         case TIPC_CMD_GET_MAX_SLAVES:
 436         case TIPC_CMD_SET_MAX_CLUSTERS:
 437         case TIPC_CMD_GET_MAX_CLUSTERS:
 438                 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 439                                                           " (obsolete command)");
 440                 break;
 441         default:
 442                 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
 443                                                           " (unknown command)");
 444                 break;
 445         }
 446
 447         /* Return reply buffer */
 448 exit:
 449         spin_unlock_bh(&config_lock);
 450         return rep_tlv_buf;
 451 }
 452
 453 static void cfg_named_msg_event(void *userdata,
 454                                 u32 port_ref,
 455                                 struct sk_buff **buf,
 456                                 const unchar *msg,
 457                                 u32 size,
 458                                 u32 importance,
 459                                 struct tipc_portid const *orig,
 460                                 struct tipc_name_seq const *dest)
 461 {
 462         struct tipc_cfg_msg_hdr *req_hdr;
 463         struct tipc_cfg_msg_hdr *rep_hdr;
 464         struct sk_buff *rep_buf;
 465
 466         /* Validate configuration message header (ignore invalid message) */
 467
 468         req_hdr = (struct tipc_cfg_msg_hdr *)msg;
 469         if ((size < sizeof(*req_hdr)) ||
 470             (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) ||
 471             (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) {
 472                 warn("Invalid configuration message discarded\n");
 473                 return;
 474         }
 475
 476         /* Generate reply for request (if can't, return request) */
 477
 478         rep_buf = tipc_cfg_do_cmd(orig->node,
 479                                   ntohs(req_hdr->tcm_type),
 480                                   msg + sizeof(*req_hdr),
 481                                   size - sizeof(*req_hdr),
 482                                   BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr));
 483         if (rep_buf) {
 484                 skb_push(rep_buf, sizeof(*rep_hdr));
 485                 rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data;
 486                 memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr));
 487                 rep_hdr->tcm_len = htonl(rep_buf->len);
 488                 rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST);
 489         } else {
 490                 rep_buf = *buf;
 491                 *buf = NULL;
 492         }
 493
 494         /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */
 495         tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len);
 496 }
 497
 498 int tipc_cfg_init(void)
 499 {
 500         struct tipc_name_seq seq;
 501         int res;
 502
 503         res = tipc_createport(NULL, TIPC_CRITICAL_IMPORTANCE,
 504                               NULL, NULL, NULL,
 505                               NULL, cfg_named_msg_event, NULL,
 506                               NULL, &config_port_ref);
 507         if (res)
 508                 goto failed;
 509
 510         seq.type = TIPC_CFG_SRV;
 511         seq.lower = seq.upper = tipc_own_addr;
 512         res = tipc_nametbl_publish_rsv(config_port_ref, TIPC_ZONE_SCOPE, &seq);
 513         if (res)
 514                 goto failed;
 515
 516         return 0;
 517
 518 failed:
 519         err("Unable to create configuration service\n");
 520         return res;
 521 }
 522
 523 void tipc_cfg_stop(void)
 524 {
 525         if (config_port_ref) {
 526                 tipc_deleteport(config_port_ref);
 527                 config_port_ref = 0;
 528         }
 529 }