Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * net/tipc/config.c: TIPC configuration management code |
| 3 | * |
| 4 | * Copyright (c) 2003-2005, Ericsson Research Canada |
| 5 | * Copyright (c) 2004-2005, Wind River Systems |
| 6 | * Copyright (c) 2005-2006, Ericsson AB |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions are met: |
| 11 | * |
| 12 | * Redistributions of source code must retain the above copyright notice, this |
| 13 | * list of conditions and the following disclaimer. |
| 14 | * Redistributions in binary form must reproduce the above copyright notice, |
| 15 | * this list of conditions and the following disclaimer in the documentation |
| 16 | * and/or other materials provided with the distribution. |
| 17 | * Neither the names of the copyright holders nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived from this |
| 19 | * software without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 22 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 25 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 31 | * POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #include "core.h" |
| 35 | #include "dbg.h" |
| 36 | #include "bearer.h" |
| 37 | #include "port.h" |
| 38 | #include "link.h" |
| 39 | #include "zone.h" |
| 40 | #include "addr.h" |
| 41 | #include "name_table.h" |
| 42 | #include "node.h" |
| 43 | #include "config.h" |
| 44 | #include "discover.h" |
| 45 | |
| 46 | struct subscr_data { |
| 47 | char usr_handle[8]; |
| 48 | u32 domain; |
| 49 | u32 port_ref; |
| 50 | struct list_head subd_list; |
| 51 | }; |
| 52 | |
| 53 | struct manager { |
| 54 | u32 user_ref; |
| 55 | u32 port_ref; |
| 56 | u32 subscr_ref; |
| 57 | u32 link_subscriptions; |
| 58 | struct list_head link_subscribers; |
| 59 | }; |
| 60 | |
| 61 | static struct manager mng = { 0}; |
| 62 | |
| 63 | static spinlock_t config_lock = SPIN_LOCK_UNLOCKED; |
| 64 | |
| 65 | static const void *req_tlv_area; /* request message TLV area */ |
| 66 | static int req_tlv_space; /* request message TLV area size */ |
| 67 | static int rep_headroom; /* reply message headroom to use */ |
| 68 | |
| 69 | |
| 70 | void cfg_link_event(u32 addr, char *name, int up) |
| 71 | { |
| 72 | /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */ |
| 73 | } |
| 74 | |
| 75 | |
| 76 | struct sk_buff *cfg_reply_alloc(int payload_size) |
| 77 | { |
| 78 | struct sk_buff *buf; |
| 79 | |
| 80 | buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC); |
| 81 | if (buf) |
| 82 | skb_reserve(buf, rep_headroom); |
| 83 | return buf; |
| 84 | } |
| 85 | |
| 86 | int cfg_append_tlv(struct sk_buff *buf, int tlv_type, |
| 87 | void *tlv_data, int tlv_data_size) |
| 88 | { |
| 89 | struct tlv_desc *tlv = (struct tlv_desc *)buf->tail; |
| 90 | int new_tlv_space = TLV_SPACE(tlv_data_size); |
| 91 | |
| 92 | if (skb_tailroom(buf) < new_tlv_space) { |
| 93 | dbg("cfg_append_tlv unable to append TLV\n"); |
| 94 | return 0; |
| 95 | } |
| 96 | skb_put(buf, new_tlv_space); |
| 97 | tlv->tlv_type = htons(tlv_type); |
| 98 | tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size)); |
| 99 | if (tlv_data_size && tlv_data) |
| 100 | memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size); |
| 101 | return 1; |
| 102 | } |
| 103 | |
| 104 | struct sk_buff *cfg_reply_unsigned_type(u16 tlv_type, u32 value) |
| 105 | { |
| 106 | struct sk_buff *buf; |
| 107 | u32 value_net; |
| 108 | |
| 109 | buf = cfg_reply_alloc(TLV_SPACE(sizeof(value))); |
| 110 | if (buf) { |
| 111 | value_net = htonl(value); |
| 112 | cfg_append_tlv(buf, tlv_type, &value_net, |
| 113 | sizeof(value_net)); |
| 114 | } |
| 115 | return buf; |
| 116 | } |
| 117 | |
| 118 | struct sk_buff *cfg_reply_string_type(u16 tlv_type, char *string) |
| 119 | { |
| 120 | struct sk_buff *buf; |
| 121 | int string_len = strlen(string) + 1; |
| 122 | |
| 123 | buf = cfg_reply_alloc(TLV_SPACE(string_len)); |
| 124 | if (buf) |
| 125 | cfg_append_tlv(buf, tlv_type, string, string_len); |
| 126 | return buf; |
| 127 | } |
| 128 | |
| 129 | |
| 130 | |
| 131 | |
| 132 | #if 0 |
| 133 | |
| 134 | /* Now obsolete code for handling commands not yet implemented the new way */ |
| 135 | |
| 136 | int tipc_cfg_cmd(const struct tipc_cmd_msg * msg, |
| 137 | char *data, |
| 138 | u32 sz, |
| 139 | u32 *ret_size, |
| 140 | struct tipc_portid *orig) |
| 141 | { |
| 142 | int rv = -EINVAL; |
| 143 | u32 cmd = msg->cmd; |
| 144 | |
| 145 | *ret_size = 0; |
| 146 | switch (cmd) { |
| 147 | case TIPC_REMOVE_LINK: |
| 148 | case TIPC_CMD_BLOCK_LINK: |
| 149 | case TIPC_CMD_UNBLOCK_LINK: |
| 150 | if (!cfg_check_connection(orig)) |
| 151 | rv = link_control(msg->argv.link_name, msg->cmd, 0); |
| 152 | break; |
| 153 | case TIPC_ESTABLISH: |
| 154 | { |
| 155 | int connected; |
| 156 | |
| 157 | tipc_isconnected(mng.conn_port_ref, &connected); |
| 158 | if (connected || !orig) { |
| 159 | rv = TIPC_FAILURE; |
| 160 | break; |
| 161 | } |
| 162 | rv = tipc_connect2port(mng.conn_port_ref, orig); |
| 163 | if (rv == TIPC_OK) |
| 164 | orig = 0; |
| 165 | break; |
| 166 | } |
| 167 | case TIPC_GET_PEER_ADDRESS: |
| 168 | *ret_size = link_peer_addr(msg->argv.link_name, data, sz); |
| 169 | break; |
| 170 | case TIPC_GET_ROUTES: |
| 171 | rv = TIPC_OK; |
| 172 | break; |
| 173 | default: {} |
| 174 | } |
| 175 | if (*ret_size) |
| 176 | rv = TIPC_OK; |
| 177 | return rv; |
| 178 | } |
| 179 | |
| 180 | static void cfg_cmd_event(struct tipc_cmd_msg *msg, |
| 181 | char *data, |
| 182 | u32 sz, |
| 183 | struct tipc_portid const *orig) |
| 184 | { |
| 185 | int rv = -EINVAL; |
| 186 | struct tipc_cmd_result_msg rmsg; |
| 187 | struct iovec msg_sect[2]; |
| 188 | int *arg; |
| 189 | |
| 190 | msg->cmd = ntohl(msg->cmd); |
| 191 | |
| 192 | cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect, |
| 193 | data, 0); |
| 194 | if (ntohl(msg->magic) != TIPC_MAGIC) |
| 195 | goto exit; |
| 196 | |
| 197 | switch (msg->cmd) { |
| 198 | case TIPC_CREATE_LINK: |
| 199 | if (!cfg_check_connection(orig)) |
| 200 | rv = disc_create_link(&msg->argv.create_link); |
| 201 | break; |
| 202 | case TIPC_LINK_SUBSCRIBE: |
| 203 | { |
| 204 | struct subscr_data *sub; |
| 205 | |
| 206 | if (mng.link_subscriptions > 64) |
| 207 | break; |
| 208 | sub = (struct subscr_data *)kmalloc(sizeof(*sub), |
| 209 | GFP_ATOMIC); |
| 210 | if (sub == NULL) { |
| 211 | warn("Memory squeeze; dropped remote link subscription\n"); |
| 212 | break; |
| 213 | } |
| 214 | INIT_LIST_HEAD(&sub->subd_list); |
| 215 | tipc_createport(mng.user_ref, |
| 216 | (void *)sub, |
| 217 | TIPC_HIGH_IMPORTANCE, |
| 218 | 0, |
| 219 | 0, |
| 220 | (tipc_conn_shutdown_event)cfg_linksubscr_cancel, |
| 221 | 0, |
| 222 | 0, |
| 223 | (tipc_conn_msg_event)cfg_linksubscr_cancel, |
| 224 | 0, |
| 225 | &sub->port_ref); |
| 226 | if (!sub->port_ref) { |
| 227 | kfree(sub); |
| 228 | break; |
| 229 | } |
| 230 | memcpy(sub->usr_handle,msg->usr_handle, |
| 231 | sizeof(sub->usr_handle)); |
| 232 | sub->domain = msg->argv.domain; |
| 233 | list_add_tail(&sub->subd_list, &mng.link_subscribers); |
| 234 | tipc_connect2port(sub->port_ref, orig); |
| 235 | rmsg.retval = TIPC_OK; |
| 236 | tipc_send(sub->port_ref, 2u, msg_sect); |
| 237 | mng.link_subscriptions++; |
| 238 | return; |
| 239 | } |
| 240 | default: |
| 241 | rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig); |
| 242 | } |
| 243 | exit: |
| 244 | rmsg.result_len = htonl(msg_sect[1].iov_len); |
| 245 | rmsg.retval = htonl(rv); |
| 246 | cfg_respond(msg_sect, 2u, orig); |
| 247 | } |
| 248 | #endif |
| 249 | |
| 250 | static struct sk_buff *cfg_enable_bearer(void) |
| 251 | { |
| 252 | struct tipc_bearer_config *args; |
| 253 | |
| 254 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG)) |
| 255 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 256 | |
| 257 | args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area); |
| 258 | if (tipc_enable_bearer(args->name, |
| 259 | ntohl(args->detect_scope), |
| 260 | ntohl(args->priority))) |
| 261 | return cfg_reply_error_string("unable to enable bearer"); |
| 262 | |
| 263 | return cfg_reply_none(); |
| 264 | } |
| 265 | |
| 266 | static struct sk_buff *cfg_disable_bearer(void) |
| 267 | { |
| 268 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME)) |
| 269 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 270 | |
| 271 | if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area))) |
| 272 | return cfg_reply_error_string("unable to disable bearer"); |
| 273 | |
| 274 | return cfg_reply_none(); |
| 275 | } |
| 276 | |
| 277 | static struct sk_buff *cfg_set_own_addr(void) |
| 278 | { |
| 279 | u32 addr; |
| 280 | |
| 281 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) |
| 282 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 283 | |
| 284 | addr = *(u32 *)TLV_DATA(req_tlv_area); |
| 285 | addr = ntohl(addr); |
| 286 | if (addr == tipc_own_addr) |
| 287 | return cfg_reply_none(); |
| 288 | if (!addr_node_valid(addr)) |
| 289 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 290 | " (node address)"); |
| 291 | if (tipc_own_addr) |
| 292 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 293 | " (cannot change node address once assigned)"); |
| 294 | |
| 295 | spin_unlock_bh(&config_lock); |
| 296 | stop_net(); |
| 297 | tipc_own_addr = addr; |
| 298 | start_net(); |
| 299 | spin_lock_bh(&config_lock); |
| 300 | return cfg_reply_none(); |
| 301 | } |
| 302 | |
| 303 | static struct sk_buff *cfg_set_remote_mng(void) |
| 304 | { |
| 305 | u32 value; |
| 306 | |
| 307 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 308 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 309 | |
| 310 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 311 | value = ntohl(value); |
| 312 | tipc_remote_management = (value != 0); |
| 313 | return cfg_reply_none(); |
| 314 | } |
| 315 | |
| 316 | static struct sk_buff *cfg_set_max_publications(void) |
| 317 | { |
| 318 | u32 value; |
| 319 | |
| 320 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 321 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 322 | |
| 323 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 324 | value = ntohl(value); |
| 325 | if (value != delimit(value, 1, 65535)) |
| 326 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 327 | " (max publications must be 1-65535)"); |
| 328 | tipc_max_publications = value; |
| 329 | return cfg_reply_none(); |
| 330 | } |
| 331 | |
| 332 | static struct sk_buff *cfg_set_max_subscriptions(void) |
| 333 | { |
| 334 | u32 value; |
| 335 | |
| 336 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 337 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 338 | |
| 339 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 340 | value = ntohl(value); |
| 341 | if (value != delimit(value, 1, 65535)) |
| 342 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 343 | " (max subscriptions must be 1-65535"); |
| 344 | tipc_max_subscriptions = value; |
| 345 | return cfg_reply_none(); |
| 346 | } |
| 347 | |
| 348 | static struct sk_buff *cfg_set_max_ports(void) |
| 349 | { |
| 350 | int orig_mode; |
| 351 | u32 value; |
| 352 | |
| 353 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 354 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 355 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 356 | value = ntohl(value); |
| 357 | if (value != delimit(value, 127, 65535)) |
| 358 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 359 | " (max ports must be 127-65535)"); |
| 360 | |
| 361 | if (value == tipc_max_ports) |
| 362 | return cfg_reply_none(); |
| 363 | |
| 364 | if (atomic_read(&tipc_user_count) > 2) |
| 365 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 366 | " (cannot change max ports while TIPC users exist)"); |
| 367 | |
| 368 | spin_unlock_bh(&config_lock); |
| 369 | orig_mode = tipc_get_mode(); |
| 370 | if (orig_mode == TIPC_NET_MODE) |
| 371 | stop_net(); |
| 372 | stop_core(); |
| 373 | tipc_max_ports = value; |
| 374 | start_core(); |
| 375 | if (orig_mode == TIPC_NET_MODE) |
| 376 | start_net(); |
| 377 | spin_lock_bh(&config_lock); |
| 378 | return cfg_reply_none(); |
| 379 | } |
| 380 | |
| 381 | static struct sk_buff *set_net_max(int value, int *parameter) |
| 382 | { |
| 383 | int orig_mode; |
| 384 | |
| 385 | if (value != *parameter) { |
| 386 | orig_mode = tipc_get_mode(); |
| 387 | if (orig_mode == TIPC_NET_MODE) |
| 388 | stop_net(); |
| 389 | *parameter = value; |
| 390 | if (orig_mode == TIPC_NET_MODE) |
| 391 | start_net(); |
| 392 | } |
| 393 | |
| 394 | return cfg_reply_none(); |
| 395 | } |
| 396 | |
| 397 | static struct sk_buff *cfg_set_max_zones(void) |
| 398 | { |
| 399 | u32 value; |
| 400 | |
| 401 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 402 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 403 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 404 | value = ntohl(value); |
| 405 | if (value != delimit(value, 1, 255)) |
| 406 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 407 | " (max zones must be 1-255)"); |
| 408 | return set_net_max(value, &tipc_max_zones); |
| 409 | } |
| 410 | |
| 411 | static struct sk_buff *cfg_set_max_clusters(void) |
| 412 | { |
| 413 | u32 value; |
| 414 | |
| 415 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 416 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 417 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 418 | value = ntohl(value); |
| 419 | if (value != 1) |
| 420 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 421 | " (max clusters fixed at 1)"); |
| 422 | return cfg_reply_none(); |
| 423 | } |
| 424 | |
| 425 | static struct sk_buff *cfg_set_max_nodes(void) |
| 426 | { |
| 427 | u32 value; |
| 428 | |
| 429 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 430 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 431 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 432 | value = ntohl(value); |
| 433 | if (value != delimit(value, 8, 2047)) |
| 434 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 435 | " (max nodes must be 8-2047)"); |
| 436 | return set_net_max(value, &tipc_max_nodes); |
| 437 | } |
| 438 | |
| 439 | static struct sk_buff *cfg_set_max_slaves(void) |
| 440 | { |
| 441 | u32 value; |
| 442 | |
| 443 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 444 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 445 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 446 | value = ntohl(value); |
| 447 | if (value != 0) |
| 448 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 449 | " (max secondary nodes fixed at 0)"); |
| 450 | return cfg_reply_none(); |
| 451 | } |
| 452 | |
| 453 | static struct sk_buff *cfg_set_netid(void) |
| 454 | { |
| 455 | u32 value; |
| 456 | |
| 457 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) |
| 458 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
| 459 | value = *(u32 *)TLV_DATA(req_tlv_area); |
| 460 | value = ntohl(value); |
| 461 | if (value != delimit(value, 1, 9999)) |
| 462 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 463 | " (network id must be 1-9999)"); |
| 464 | |
| 465 | if (tipc_own_addr) |
| 466 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 467 | " (cannot change network id once part of network)"); |
| 468 | |
| 469 | return set_net_max(value, &tipc_net_id); |
| 470 | } |
| 471 | |
| 472 | struct sk_buff *cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, |
| 473 | int request_space, int reply_headroom) |
| 474 | { |
| 475 | struct sk_buff *rep_tlv_buf; |
| 476 | |
| 477 | spin_lock_bh(&config_lock); |
| 478 | |
| 479 | /* Save request and reply details in a well-known location */ |
| 480 | |
| 481 | req_tlv_area = request_area; |
| 482 | req_tlv_space = request_space; |
| 483 | rep_headroom = reply_headroom; |
| 484 | |
| 485 | /* Check command authorization */ |
| 486 | |
| 487 | if (likely(orig_node == tipc_own_addr)) { |
| 488 | /* command is permitted */ |
| 489 | } else if (cmd >= 0x8000) { |
| 490 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 491 | " (cannot be done remotely)"); |
| 492 | goto exit; |
| 493 | } else if (!tipc_remote_management) { |
| 494 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NO_REMOTE); |
| 495 | goto exit; |
| 496 | } |
| 497 | else if (cmd >= 0x4000) { |
| 498 | u32 domain = 0; |
| 499 | |
| 500 | if ((nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) || |
| 501 | (domain != orig_node)) { |
| 502 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR); |
| 503 | goto exit; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | /* Call appropriate processing routine */ |
| 508 | |
| 509 | switch (cmd) { |
| 510 | case TIPC_CMD_NOOP: |
| 511 | rep_tlv_buf = cfg_reply_none(); |
| 512 | break; |
| 513 | case TIPC_CMD_GET_NODES: |
| 514 | rep_tlv_buf = node_get_nodes(req_tlv_area, req_tlv_space); |
| 515 | break; |
| 516 | case TIPC_CMD_GET_LINKS: |
| 517 | rep_tlv_buf = node_get_links(req_tlv_area, req_tlv_space); |
| 518 | break; |
| 519 | case TIPC_CMD_SHOW_LINK_STATS: |
| 520 | rep_tlv_buf = link_cmd_show_stats(req_tlv_area, req_tlv_space); |
| 521 | break; |
| 522 | case TIPC_CMD_RESET_LINK_STATS: |
| 523 | rep_tlv_buf = link_cmd_reset_stats(req_tlv_area, req_tlv_space); |
| 524 | break; |
| 525 | case TIPC_CMD_SHOW_NAME_TABLE: |
| 526 | rep_tlv_buf = nametbl_get(req_tlv_area, req_tlv_space); |
| 527 | break; |
| 528 | case TIPC_CMD_GET_BEARER_NAMES: |
| 529 | rep_tlv_buf = bearer_get_names(); |
| 530 | break; |
| 531 | case TIPC_CMD_GET_MEDIA_NAMES: |
| 532 | rep_tlv_buf = media_get_names(); |
| 533 | break; |
| 534 | case TIPC_CMD_SHOW_PORTS: |
| 535 | rep_tlv_buf = port_get_ports(); |
| 536 | break; |
| 537 | #if 0 |
| 538 | case TIPC_CMD_SHOW_PORT_STATS: |
| 539 | rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space); |
| 540 | break; |
| 541 | case TIPC_CMD_RESET_PORT_STATS: |
| 542 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED); |
| 543 | break; |
| 544 | #endif |
| 545 | case TIPC_CMD_SET_LOG_SIZE: |
| 546 | rep_tlv_buf = log_resize(req_tlv_area, req_tlv_space); |
| 547 | break; |
| 548 | case TIPC_CMD_DUMP_LOG: |
| 549 | rep_tlv_buf = log_dump(); |
| 550 | break; |
| 551 | case TIPC_CMD_SET_LINK_TOL: |
| 552 | case TIPC_CMD_SET_LINK_PRI: |
| 553 | case TIPC_CMD_SET_LINK_WINDOW: |
| 554 | rep_tlv_buf = link_cmd_config(req_tlv_area, req_tlv_space, cmd); |
| 555 | break; |
| 556 | case TIPC_CMD_ENABLE_BEARER: |
| 557 | rep_tlv_buf = cfg_enable_bearer(); |
| 558 | break; |
| 559 | case TIPC_CMD_DISABLE_BEARER: |
| 560 | rep_tlv_buf = cfg_disable_bearer(); |
| 561 | break; |
| 562 | case TIPC_CMD_SET_NODE_ADDR: |
| 563 | rep_tlv_buf = cfg_set_own_addr(); |
| 564 | break; |
| 565 | case TIPC_CMD_SET_REMOTE_MNG: |
| 566 | rep_tlv_buf = cfg_set_remote_mng(); |
| 567 | break; |
| 568 | case TIPC_CMD_SET_MAX_PORTS: |
| 569 | rep_tlv_buf = cfg_set_max_ports(); |
| 570 | break; |
| 571 | case TIPC_CMD_SET_MAX_PUBL: |
| 572 | rep_tlv_buf = cfg_set_max_publications(); |
| 573 | break; |
| 574 | case TIPC_CMD_SET_MAX_SUBSCR: |
| 575 | rep_tlv_buf = cfg_set_max_subscriptions(); |
| 576 | break; |
| 577 | case TIPC_CMD_SET_MAX_ZONES: |
| 578 | rep_tlv_buf = cfg_set_max_zones(); |
| 579 | break; |
| 580 | case TIPC_CMD_SET_MAX_CLUSTERS: |
| 581 | rep_tlv_buf = cfg_set_max_clusters(); |
| 582 | break; |
| 583 | case TIPC_CMD_SET_MAX_NODES: |
| 584 | rep_tlv_buf = cfg_set_max_nodes(); |
| 585 | break; |
| 586 | case TIPC_CMD_SET_MAX_SLAVES: |
| 587 | rep_tlv_buf = cfg_set_max_slaves(); |
| 588 | break; |
| 589 | case TIPC_CMD_SET_NETID: |
| 590 | rep_tlv_buf = cfg_set_netid(); |
| 591 | break; |
| 592 | case TIPC_CMD_GET_REMOTE_MNG: |
| 593 | rep_tlv_buf = cfg_reply_unsigned(tipc_remote_management); |
| 594 | break; |
| 595 | case TIPC_CMD_GET_MAX_PORTS: |
| 596 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_ports); |
| 597 | break; |
| 598 | case TIPC_CMD_GET_MAX_PUBL: |
| 599 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_publications); |
| 600 | break; |
| 601 | case TIPC_CMD_GET_MAX_SUBSCR: |
| 602 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_subscriptions); |
| 603 | break; |
| 604 | case TIPC_CMD_GET_MAX_ZONES: |
| 605 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_zones); |
| 606 | break; |
| 607 | case TIPC_CMD_GET_MAX_CLUSTERS: |
| 608 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_clusters); |
| 609 | break; |
| 610 | case TIPC_CMD_GET_MAX_NODES: |
| 611 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_nodes); |
| 612 | break; |
| 613 | case TIPC_CMD_GET_MAX_SLAVES: |
| 614 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_slaves); |
| 615 | break; |
| 616 | case TIPC_CMD_GET_NETID: |
| 617 | rep_tlv_buf = cfg_reply_unsigned(tipc_net_id); |
| 618 | break; |
| 619 | default: |
| 620 | rep_tlv_buf = NULL; |
| 621 | break; |
| 622 | } |
| 623 | |
| 624 | /* Return reply buffer */ |
| 625 | exit: |
| 626 | spin_unlock_bh(&config_lock); |
| 627 | return rep_tlv_buf; |
| 628 | } |
| 629 | |
| 630 | static void cfg_named_msg_event(void *userdata, |
| 631 | u32 port_ref, |
| 632 | struct sk_buff **buf, |
| 633 | const unchar *msg, |
| 634 | u32 size, |
| 635 | u32 importance, |
| 636 | struct tipc_portid const *orig, |
| 637 | struct tipc_name_seq const *dest) |
| 638 | { |
| 639 | struct tipc_cfg_msg_hdr *req_hdr; |
| 640 | struct tipc_cfg_msg_hdr *rep_hdr; |
| 641 | struct sk_buff *rep_buf; |
| 642 | |
| 643 | /* Validate configuration message header (ignore invalid message) */ |
| 644 | |
| 645 | req_hdr = (struct tipc_cfg_msg_hdr *)msg; |
| 646 | if ((size < sizeof(*req_hdr)) || |
| 647 | (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) || |
| 648 | (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) { |
| 649 | warn("discarded invalid configuration message\n"); |
| 650 | return; |
| 651 | } |
| 652 | |
| 653 | /* Generate reply for request (if can't, return request) */ |
| 654 | |
| 655 | rep_buf = cfg_do_cmd(orig->node, |
| 656 | ntohs(req_hdr->tcm_type), |
| 657 | msg + sizeof(*req_hdr), |
| 658 | size - sizeof(*req_hdr), |
| 659 | BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr)); |
| 660 | if (rep_buf) { |
| 661 | skb_push(rep_buf, sizeof(*rep_hdr)); |
| 662 | rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data; |
| 663 | memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr)); |
| 664 | rep_hdr->tcm_len = htonl(rep_buf->len); |
| 665 | rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST); |
| 666 | } else { |
| 667 | rep_buf = *buf; |
| 668 | *buf = NULL; |
| 669 | } |
| 670 | |
| 671 | /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */ |
| 672 | tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len); |
| 673 | } |
| 674 | |
| 675 | int cfg_init(void) |
| 676 | { |
| 677 | struct tipc_name_seq seq; |
| 678 | int res; |
| 679 | |
| 680 | memset(&mng, 0, sizeof(mng)); |
| 681 | INIT_LIST_HEAD(&mng.link_subscribers); |
| 682 | |
| 683 | res = tipc_attach(&mng.user_ref, 0, 0); |
| 684 | if (res) |
| 685 | goto failed; |
| 686 | |
| 687 | res = tipc_createport(mng.user_ref, 0, TIPC_CRITICAL_IMPORTANCE, |
| 688 | NULL, NULL, NULL, |
| 689 | NULL, cfg_named_msg_event, NULL, |
| 690 | NULL, &mng.port_ref); |
| 691 | if (res) |
| 692 | goto failed; |
| 693 | |
| 694 | seq.type = TIPC_CFG_SRV; |
| 695 | seq.lower = seq.upper = tipc_own_addr; |
| 696 | res = nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq); |
| 697 | if (res) |
| 698 | goto failed; |
| 699 | |
| 700 | return 0; |
| 701 | |
| 702 | failed: |
| 703 | err("Unable to create configuration service\n"); |
| 704 | tipc_detach(mng.user_ref); |
| 705 | mng.user_ref = 0; |
| 706 | return res; |
| 707 | } |
| 708 | |
| 709 | void cfg_stop(void) |
| 710 | { |
| 711 | if (mng.user_ref) { |
| 712 | tipc_detach(mng.user_ref); |
| 713 | mng.user_ref = 0; |
| 714 | } |
| 715 | } |