1 /* 2 * Copyright (c) 2014, Ericsson AB 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the names of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 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 "bearer.h" 36 #include "link.h" 37 #include "name_table.h" 38 #include "socket.h" 39 #include "node.h" 40 #include "net.h" 41 #include <net/genetlink.h> 42 #include <linux/tipc_config.h> 43 44 /* The legacy API had an artificial message length limit called 45 * ULTRA_STRING_MAX_LEN. 46 */ 47 #define ULTRA_STRING_MAX_LEN 32768 48 49 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN) 50 51 #define REPLY_TRUNCATED "<truncated>\n" 52 53 struct tipc_nl_compat_msg { 54 u16 cmd; 55 int rep_type; 56 int rep_size; 57 int req_type; 58 struct net *net; 59 struct sk_buff *rep; 60 struct tlv_desc *req; 61 struct sock *dst_sk; 62 }; 63 64 struct tipc_nl_compat_cmd_dump { 65 int (*header)(struct tipc_nl_compat_msg *); 66 int (*dumpit)(struct sk_buff *, struct netlink_callback *); 67 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs); 68 }; 69 70 struct tipc_nl_compat_cmd_doit { 71 int (*doit)(struct sk_buff *skb, struct genl_info *info); 72 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd, 73 struct sk_buff *skb, struct tipc_nl_compat_msg *msg); 74 }; 75 76 static int tipc_skb_tailroom(struct sk_buff *skb) 77 { 78 int tailroom; 79 int limit; 80 81 tailroom = skb_tailroom(skb); 82 limit = TIPC_SKB_MAX - skb->len; 83 84 if (tailroom < limit) 85 return tailroom; 86 87 return limit; 88 } 89 90 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) 91 { 92 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb); 93 94 if (tipc_skb_tailroom(skb) < TLV_SPACE(len)) 95 return -EMSGSIZE; 96 97 skb_put(skb, TLV_SPACE(len)); 98 tlv->tlv_type = htons(type); 99 tlv->tlv_len = htons(TLV_LENGTH(len)); 100 if (len && data) 101 memcpy(TLV_DATA(tlv), data, len); 102 103 return 0; 104 } 105 106 static void tipc_tlv_init(struct sk_buff *skb, u16 type) 107 { 108 struct tlv_desc *tlv = (struct tlv_desc *)skb->data; 109 110 TLV_SET_LEN(tlv, 0); 111 TLV_SET_TYPE(tlv, type); 112 skb_put(skb, sizeof(struct tlv_desc)); 113 } 114 115 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...) 116 { 117 int n; 118 u16 len; 119 u32 rem; 120 char *buf; 121 struct tlv_desc *tlv; 122 va_list args; 123 124 rem = tipc_skb_tailroom(skb); 125 126 tlv = (struct tlv_desc *)skb->data; 127 len = TLV_GET_LEN(tlv); 128 buf = TLV_DATA(tlv) + len; 129 130 va_start(args, fmt); 131 n = vscnprintf(buf, rem, fmt, args); 132 va_end(args); 133 134 TLV_SET_LEN(tlv, n + len); 135 skb_put(skb, n); 136 137 return n; 138 } 139 140 static struct sk_buff *tipc_tlv_alloc(int size) 141 { 142 int hdr_len; 143 struct sk_buff *buf; 144 145 size = TLV_SPACE(size); 146 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 147 148 buf = alloc_skb(hdr_len + size, GFP_KERNEL); 149 if (!buf) 150 return NULL; 151 152 skb_reserve(buf, hdr_len); 153 154 return buf; 155 } 156 157 static struct sk_buff *tipc_get_err_tlv(char *str) 158 { 159 int str_len = strlen(str) + 1; 160 struct sk_buff *buf; 161 162 buf = tipc_tlv_alloc(TLV_SPACE(str_len)); 163 if (buf) 164 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len); 165 166 return buf; 167 } 168 169 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 170 struct tipc_nl_compat_msg *msg, 171 struct sk_buff *arg) 172 { 173 int len = 0; 174 int err; 175 struct sk_buff *buf; 176 struct nlmsghdr *nlmsg; 177 struct netlink_callback cb; 178 179 memset(&cb, 0, sizeof(cb)); 180 cb.nlh = (struct nlmsghdr *)arg->data; 181 cb.skb = arg; 182 183 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 184 if (!buf) 185 return -ENOMEM; 186 187 buf->sk = msg->dst_sk; 188 189 do { 190 int rem; 191 192 len = (*cmd->dumpit)(buf, &cb); 193 194 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { 195 struct nlattr **attrs; 196 197 err = tipc_nlmsg_parse(nlmsg, &attrs); 198 if (err) 199 goto err_out; 200 201 err = (*cmd->format)(msg, attrs); 202 if (err) 203 goto err_out; 204 205 if (tipc_skb_tailroom(msg->rep) <= 1) { 206 err = -EMSGSIZE; 207 goto err_out; 208 } 209 } 210 211 skb_reset_tail_pointer(buf); 212 buf->len = 0; 213 214 } while (len); 215 216 err = 0; 217 218 err_out: 219 kfree_skb(buf); 220 221 if (err == -EMSGSIZE) { 222 /* The legacy API only considered messages filling 223 * "ULTRA_STRING_MAX_LEN" to be truncated. 224 */ 225 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { 226 char *tail = skb_tail_pointer(msg->rep); 227 228 if (*tail != '\0') 229 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, 230 REPLY_TRUNCATED); 231 } 232 233 return 0; 234 } 235 236 return err; 237 } 238 239 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 240 struct tipc_nl_compat_msg *msg) 241 { 242 int err; 243 struct sk_buff *arg; 244 245 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) 246 return -EINVAL; 247 248 msg->rep = tipc_tlv_alloc(msg->rep_size); 249 if (!msg->rep) 250 return -ENOMEM; 251 252 if (msg->rep_type) 253 tipc_tlv_init(msg->rep, msg->rep_type); 254 255 if (cmd->header) 256 (*cmd->header)(msg); 257 258 arg = nlmsg_new(0, GFP_KERNEL); 259 if (!arg) { 260 kfree_skb(msg->rep); 261 return -ENOMEM; 262 } 263 264 err = __tipc_nl_compat_dumpit(cmd, msg, arg); 265 if (err) 266 kfree_skb(msg->rep); 267 268 kfree_skb(arg); 269 270 return err; 271 } 272 273 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 274 struct tipc_nl_compat_msg *msg) 275 { 276 int err; 277 struct sk_buff *doit_buf; 278 struct sk_buff *trans_buf; 279 struct nlattr **attrbuf; 280 struct genl_info info; 281 282 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 283 if (!trans_buf) 284 return -ENOMEM; 285 286 err = (*cmd->transcode)(cmd, trans_buf, msg); 287 if (err) 288 goto trans_out; 289 290 attrbuf = kmalloc((tipc_genl_family.maxattr + 1) * 291 sizeof(struct nlattr *), GFP_KERNEL); 292 if (!attrbuf) { 293 err = -ENOMEM; 294 goto trans_out; 295 } 296 297 err = nla_parse(attrbuf, tipc_genl_family.maxattr, 298 (const struct nlattr *)trans_buf->data, 299 trans_buf->len, NULL); 300 if (err) 301 goto parse_out; 302 303 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 304 if (!doit_buf) { 305 err = -ENOMEM; 306 goto parse_out; 307 } 308 309 doit_buf->sk = msg->dst_sk; 310 311 memset(&info, 0, sizeof(info)); 312 info.attrs = attrbuf; 313 314 err = (*cmd->doit)(doit_buf, &info); 315 316 kfree_skb(doit_buf); 317 parse_out: 318 kfree(attrbuf); 319 trans_out: 320 kfree_skb(trans_buf); 321 322 return err; 323 } 324 325 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 326 struct tipc_nl_compat_msg *msg) 327 { 328 int err; 329 330 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) 331 return -EINVAL; 332 333 err = __tipc_nl_compat_doit(cmd, msg); 334 if (err) 335 return err; 336 337 /* The legacy API considered an empty message a success message */ 338 msg->rep = tipc_tlv_alloc(0); 339 if (!msg->rep) 340 return -ENOMEM; 341 342 return 0; 343 } 344 345 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, 346 struct nlattr **attrs) 347 { 348 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; 349 350 nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER], 351 NULL); 352 353 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, 354 nla_data(bearer[TIPC_NLA_BEARER_NAME]), 355 nla_len(bearer[TIPC_NLA_BEARER_NAME])); 356 } 357 358 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, 359 struct sk_buff *skb, 360 struct tipc_nl_compat_msg *msg) 361 { 362 struct nlattr *prop; 363 struct nlattr *bearer; 364 struct tipc_bearer_config *b; 365 366 b = (struct tipc_bearer_config *)TLV_DATA(msg->req); 367 368 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 369 if (!bearer) 370 return -EMSGSIZE; 371 372 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) 373 return -EMSGSIZE; 374 375 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) 376 return -EMSGSIZE; 377 378 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { 379 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); 380 if (!prop) 381 return -EMSGSIZE; 382 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) 383 return -EMSGSIZE; 384 nla_nest_end(skb, prop); 385 } 386 nla_nest_end(skb, bearer); 387 388 return 0; 389 } 390 391 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, 392 struct sk_buff *skb, 393 struct tipc_nl_compat_msg *msg) 394 { 395 char *name; 396 struct nlattr *bearer; 397 398 name = (char *)TLV_DATA(msg->req); 399 400 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 401 if (!bearer) 402 return -EMSGSIZE; 403 404 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 405 return -EMSGSIZE; 406 407 nla_nest_end(skb, bearer); 408 409 return 0; 410 } 411 412 static inline u32 perc(u32 count, u32 total) 413 { 414 return (count * 100 + (total / 2)) / total; 415 } 416 417 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 418 struct nlattr *prop[], struct nlattr *stats[]) 419 { 420 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 421 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 422 423 tipc_tlv_sprintf(msg->rep, 424 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 425 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 426 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 427 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 428 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 429 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 430 431 tipc_tlv_sprintf(msg->rep, 432 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 433 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 434 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 435 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 436 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 437 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 438 439 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 440 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 441 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 442 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 443 444 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 445 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 446 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 447 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 448 449 tipc_tlv_sprintf(msg->rep, 450 " Congestion link:%u Send queue max:%u avg:%u", 451 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 452 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 453 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 454 } 455 456 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 457 struct nlattr **attrs) 458 { 459 char *name; 460 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 461 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 462 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 463 464 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); 465 466 nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP], 467 NULL); 468 469 nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS], 470 NULL); 471 472 name = (char *)TLV_DATA(msg->req); 473 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 474 return 0; 475 476 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 477 nla_data(link[TIPC_NLA_LINK_NAME])); 478 479 if (link[TIPC_NLA_LINK_BROADCAST]) { 480 __fill_bc_link_stat(msg, prop, stats); 481 return 0; 482 } 483 484 if (link[TIPC_NLA_LINK_ACTIVE]) 485 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 486 else if (link[TIPC_NLA_LINK_UP]) 487 tipc_tlv_sprintf(msg->rep, " STANDBY"); 488 else 489 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 490 491 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 492 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 493 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 494 495 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 496 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 497 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 498 499 tipc_tlv_sprintf(msg->rep, 500 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 501 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 502 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 503 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 504 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 505 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 506 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 507 508 tipc_tlv_sprintf(msg->rep, 509 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 510 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 511 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 512 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 513 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 514 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 515 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 516 517 tipc_tlv_sprintf(msg->rep, 518 " TX profile sample:%u packets average:%u octets\n", 519 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 520 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 521 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 522 523 tipc_tlv_sprintf(msg->rep, 524 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 525 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 526 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 527 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 528 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 529 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 530 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 531 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 532 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 533 534 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 535 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 536 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 537 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 538 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 539 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 540 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 541 542 tipc_tlv_sprintf(msg->rep, 543 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 544 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 545 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 546 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 547 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 548 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 549 550 tipc_tlv_sprintf(msg->rep, 551 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 552 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 553 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 554 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 555 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 556 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 557 558 tipc_tlv_sprintf(msg->rep, 559 " Congestion link:%u Send queue max:%u avg:%u", 560 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 561 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 562 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 563 564 return 0; 565 } 566 567 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 568 struct nlattr **attrs) 569 { 570 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 571 struct tipc_link_info link_info; 572 573 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); 574 575 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); 576 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 577 strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME])); 578 579 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 580 &link_info, sizeof(link_info)); 581 } 582 583 static int __tipc_add_link_prop(struct sk_buff *skb, 584 struct tipc_nl_compat_msg *msg, 585 struct tipc_link_config *lc) 586 { 587 switch (msg->cmd) { 588 case TIPC_CMD_SET_LINK_PRI: 589 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 590 case TIPC_CMD_SET_LINK_TOL: 591 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 592 case TIPC_CMD_SET_LINK_WINDOW: 593 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 594 } 595 596 return -EINVAL; 597 } 598 599 static int tipc_nl_compat_media_set(struct sk_buff *skb, 600 struct tipc_nl_compat_msg *msg) 601 { 602 struct nlattr *prop; 603 struct nlattr *media; 604 struct tipc_link_config *lc; 605 606 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 607 608 media = nla_nest_start(skb, TIPC_NLA_MEDIA); 609 if (!media) 610 return -EMSGSIZE; 611 612 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 613 return -EMSGSIZE; 614 615 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP); 616 if (!prop) 617 return -EMSGSIZE; 618 619 __tipc_add_link_prop(skb, msg, lc); 620 nla_nest_end(skb, prop); 621 nla_nest_end(skb, media); 622 623 return 0; 624 } 625 626 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 627 struct tipc_nl_compat_msg *msg) 628 { 629 struct nlattr *prop; 630 struct nlattr *bearer; 631 struct tipc_link_config *lc; 632 633 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 634 635 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 636 if (!bearer) 637 return -EMSGSIZE; 638 639 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 640 return -EMSGSIZE; 641 642 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); 643 if (!prop) 644 return -EMSGSIZE; 645 646 __tipc_add_link_prop(skb, msg, lc); 647 nla_nest_end(skb, prop); 648 nla_nest_end(skb, bearer); 649 650 return 0; 651 } 652 653 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 654 struct tipc_nl_compat_msg *msg) 655 { 656 struct nlattr *prop; 657 struct nlattr *link; 658 struct tipc_link_config *lc; 659 660 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 661 662 link = nla_nest_start(skb, TIPC_NLA_LINK); 663 if (!link) 664 return -EMSGSIZE; 665 666 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 667 return -EMSGSIZE; 668 669 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP); 670 if (!prop) 671 return -EMSGSIZE; 672 673 __tipc_add_link_prop(skb, msg, lc); 674 nla_nest_end(skb, prop); 675 nla_nest_end(skb, link); 676 677 return 0; 678 } 679 680 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 681 struct sk_buff *skb, 682 struct tipc_nl_compat_msg *msg) 683 { 684 struct tipc_link_config *lc; 685 struct tipc_bearer *bearer; 686 struct tipc_media *media; 687 688 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 689 690 media = tipc_media_find(lc->name); 691 if (media) { 692 cmd->doit = &tipc_nl_media_set; 693 return tipc_nl_compat_media_set(skb, msg); 694 } 695 696 bearer = tipc_bearer_find(msg->net, lc->name); 697 if (bearer) { 698 cmd->doit = &tipc_nl_bearer_set; 699 return tipc_nl_compat_bearer_set(skb, msg); 700 } 701 702 return __tipc_nl_compat_link_set(skb, msg); 703 } 704 705 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 706 struct sk_buff *skb, 707 struct tipc_nl_compat_msg *msg) 708 { 709 char *name; 710 struct nlattr *link; 711 712 name = (char *)TLV_DATA(msg->req); 713 714 link = nla_nest_start(skb, TIPC_NLA_LINK); 715 if (!link) 716 return -EMSGSIZE; 717 718 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 719 return -EMSGSIZE; 720 721 nla_nest_end(skb, link); 722 723 return 0; 724 } 725 726 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 727 { 728 int i; 729 u32 depth; 730 struct tipc_name_table_query *ntq; 731 static const char * const header[] = { 732 "Type ", 733 "Lower Upper ", 734 "Port Identity ", 735 "Publication Scope" 736 }; 737 738 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 739 740 depth = ntohl(ntq->depth); 741 742 if (depth > 4) 743 depth = 4; 744 for (i = 0; i < depth; i++) 745 tipc_tlv_sprintf(msg->rep, header[i]); 746 tipc_tlv_sprintf(msg->rep, "\n"); 747 748 return 0; 749 } 750 751 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 752 struct nlattr **attrs) 753 { 754 char port_str[27]; 755 struct tipc_name_table_query *ntq; 756 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 757 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 758 u32 node, depth, type, lowbound, upbound; 759 static const char * const scope_str[] = {"", " zone", " cluster", 760 " node"}; 761 762 nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX, 763 attrs[TIPC_NLA_NAME_TABLE], NULL); 764 765 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL], 766 NULL); 767 768 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 769 770 depth = ntohl(ntq->depth); 771 type = ntohl(ntq->type); 772 lowbound = ntohl(ntq->lowbound); 773 upbound = ntohl(ntq->upbound); 774 775 if (!(depth & TIPC_NTQ_ALLTYPES) && 776 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 777 return 0; 778 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 779 return 0; 780 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 781 return 0; 782 783 tipc_tlv_sprintf(msg->rep, "%-10u ", 784 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 785 786 if (depth == 1) 787 goto out; 788 789 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 790 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 791 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 792 793 if (depth == 2) 794 goto out; 795 796 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 797 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 798 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 799 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 800 801 if (depth == 3) 802 goto out; 803 804 tipc_tlv_sprintf(msg->rep, "%-10u %s", 805 nla_get_u32(publ[TIPC_NLA_PUBL_REF]), 806 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 807 out: 808 tipc_tlv_sprintf(msg->rep, "\n"); 809 810 return 0; 811 } 812 813 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 814 struct nlattr **attrs) 815 { 816 u32 type, lower, upper; 817 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 818 819 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL); 820 821 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 822 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 823 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 824 825 if (lower == upper) 826 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 827 else 828 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 829 830 return 0; 831 } 832 833 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 834 { 835 int err; 836 void *hdr; 837 struct nlattr *nest; 838 struct sk_buff *args; 839 struct tipc_nl_compat_cmd_dump dump; 840 841 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 842 if (!args) 843 return -ENOMEM; 844 845 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 846 TIPC_NL_PUBL_GET); 847 848 nest = nla_nest_start(args, TIPC_NLA_SOCK); 849 if (!nest) { 850 kfree_skb(args); 851 return -EMSGSIZE; 852 } 853 854 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 855 kfree_skb(args); 856 return -EMSGSIZE; 857 } 858 859 nla_nest_end(args, nest); 860 genlmsg_end(args, hdr); 861 862 dump.dumpit = tipc_nl_publ_dump; 863 dump.format = __tipc_nl_compat_publ_dump; 864 865 err = __tipc_nl_compat_dumpit(&dump, msg, args); 866 867 kfree_skb(args); 868 869 return err; 870 } 871 872 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 873 struct nlattr **attrs) 874 { 875 int err; 876 u32 sock_ref; 877 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 878 879 nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL); 880 881 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 882 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 883 884 if (sock[TIPC_NLA_SOCK_CON]) { 885 u32 node; 886 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 887 888 nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON], 889 NULL); 890 891 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 892 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 893 tipc_zone(node), 894 tipc_cluster(node), 895 tipc_node(node), 896 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 897 898 if (con[TIPC_NLA_CON_FLAG]) 899 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 900 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 901 nla_get_u32(con[TIPC_NLA_CON_INST])); 902 else 903 tipc_tlv_sprintf(msg->rep, "\n"); 904 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 905 tipc_tlv_sprintf(msg->rep, " bound to"); 906 907 err = tipc_nl_compat_publ_dump(msg, sock_ref); 908 if (err) 909 return err; 910 } 911 tipc_tlv_sprintf(msg->rep, "\n"); 912 913 return 0; 914 } 915 916 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 917 struct nlattr **attrs) 918 { 919 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 920 921 nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA], 922 NULL); 923 924 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 925 nla_data(media[TIPC_NLA_MEDIA_NAME]), 926 nla_len(media[TIPC_NLA_MEDIA_NAME])); 927 } 928 929 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 930 struct nlattr **attrs) 931 { 932 struct tipc_node_info node_info; 933 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 934 935 nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL); 936 937 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 938 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 939 940 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 941 sizeof(node_info)); 942 } 943 944 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 945 struct sk_buff *skb, 946 struct tipc_nl_compat_msg *msg) 947 { 948 u32 val; 949 struct nlattr *net; 950 951 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 952 953 net = nla_nest_start(skb, TIPC_NLA_NET); 954 if (!net) 955 return -EMSGSIZE; 956 957 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 958 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 959 return -EMSGSIZE; 960 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 961 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 962 return -EMSGSIZE; 963 } 964 nla_nest_end(skb, net); 965 966 return 0; 967 } 968 969 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 970 struct nlattr **attrs) 971 { 972 __be32 id; 973 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 974 975 nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL); 976 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 977 978 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 979 } 980 981 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 982 { 983 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 984 if (!msg->rep) 985 return -ENOMEM; 986 987 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 988 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 989 990 return 0; 991 } 992 993 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 994 { 995 struct tipc_nl_compat_cmd_dump dump; 996 struct tipc_nl_compat_cmd_doit doit; 997 998 memset(&dump, 0, sizeof(dump)); 999 memset(&doit, 0, sizeof(doit)); 1000 1001 switch (msg->cmd) { 1002 case TIPC_CMD_NOOP: 1003 msg->rep = tipc_tlv_alloc(0); 1004 if (!msg->rep) 1005 return -ENOMEM; 1006 return 0; 1007 case TIPC_CMD_GET_BEARER_NAMES: 1008 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1009 dump.dumpit = tipc_nl_bearer_dump; 1010 dump.format = tipc_nl_compat_bearer_dump; 1011 return tipc_nl_compat_dumpit(&dump, msg); 1012 case TIPC_CMD_ENABLE_BEARER: 1013 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1014 doit.doit = tipc_nl_bearer_enable; 1015 doit.transcode = tipc_nl_compat_bearer_enable; 1016 return tipc_nl_compat_doit(&doit, msg); 1017 case TIPC_CMD_DISABLE_BEARER: 1018 msg->req_type = TIPC_TLV_BEARER_NAME; 1019 doit.doit = tipc_nl_bearer_disable; 1020 doit.transcode = tipc_nl_compat_bearer_disable; 1021 return tipc_nl_compat_doit(&doit, msg); 1022 case TIPC_CMD_SHOW_LINK_STATS: 1023 msg->req_type = TIPC_TLV_LINK_NAME; 1024 msg->rep_size = ULTRA_STRING_MAX_LEN; 1025 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1026 dump.dumpit = tipc_nl_node_dump_link; 1027 dump.format = tipc_nl_compat_link_stat_dump; 1028 return tipc_nl_compat_dumpit(&dump, msg); 1029 case TIPC_CMD_GET_LINKS: 1030 msg->req_type = TIPC_TLV_NET_ADDR; 1031 msg->rep_size = ULTRA_STRING_MAX_LEN; 1032 dump.dumpit = tipc_nl_node_dump_link; 1033 dump.format = tipc_nl_compat_link_dump; 1034 return tipc_nl_compat_dumpit(&dump, msg); 1035 case TIPC_CMD_SET_LINK_TOL: 1036 case TIPC_CMD_SET_LINK_PRI: 1037 case TIPC_CMD_SET_LINK_WINDOW: 1038 msg->req_type = TIPC_TLV_LINK_CONFIG; 1039 doit.doit = tipc_nl_node_set_link; 1040 doit.transcode = tipc_nl_compat_link_set; 1041 return tipc_nl_compat_doit(&doit, msg); 1042 case TIPC_CMD_RESET_LINK_STATS: 1043 msg->req_type = TIPC_TLV_LINK_NAME; 1044 doit.doit = tipc_nl_node_reset_link_stats; 1045 doit.transcode = tipc_nl_compat_link_reset_stats; 1046 return tipc_nl_compat_doit(&doit, msg); 1047 case TIPC_CMD_SHOW_NAME_TABLE: 1048 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1049 msg->rep_size = ULTRA_STRING_MAX_LEN; 1050 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1051 dump.header = tipc_nl_compat_name_table_dump_header; 1052 dump.dumpit = tipc_nl_name_table_dump; 1053 dump.format = tipc_nl_compat_name_table_dump; 1054 return tipc_nl_compat_dumpit(&dump, msg); 1055 case TIPC_CMD_SHOW_PORTS: 1056 msg->rep_size = ULTRA_STRING_MAX_LEN; 1057 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1058 dump.dumpit = tipc_nl_sk_dump; 1059 dump.format = tipc_nl_compat_sk_dump; 1060 return tipc_nl_compat_dumpit(&dump, msg); 1061 case TIPC_CMD_GET_MEDIA_NAMES: 1062 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1063 dump.dumpit = tipc_nl_media_dump; 1064 dump.format = tipc_nl_compat_media_dump; 1065 return tipc_nl_compat_dumpit(&dump, msg); 1066 case TIPC_CMD_GET_NODES: 1067 msg->rep_size = ULTRA_STRING_MAX_LEN; 1068 dump.dumpit = tipc_nl_node_dump; 1069 dump.format = tipc_nl_compat_node_dump; 1070 return tipc_nl_compat_dumpit(&dump, msg); 1071 case TIPC_CMD_SET_NODE_ADDR: 1072 msg->req_type = TIPC_TLV_NET_ADDR; 1073 doit.doit = tipc_nl_net_set; 1074 doit.transcode = tipc_nl_compat_net_set; 1075 return tipc_nl_compat_doit(&doit, msg); 1076 case TIPC_CMD_SET_NETID: 1077 msg->req_type = TIPC_TLV_UNSIGNED; 1078 doit.doit = tipc_nl_net_set; 1079 doit.transcode = tipc_nl_compat_net_set; 1080 return tipc_nl_compat_doit(&doit, msg); 1081 case TIPC_CMD_GET_NETID: 1082 msg->rep_size = sizeof(u32); 1083 dump.dumpit = tipc_nl_net_dump; 1084 dump.format = tipc_nl_compat_net_dump; 1085 return tipc_nl_compat_dumpit(&dump, msg); 1086 case TIPC_CMD_SHOW_STATS: 1087 return tipc_cmd_show_stats_compat(msg); 1088 } 1089 1090 return -EOPNOTSUPP; 1091 } 1092 1093 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1094 { 1095 int err; 1096 int len; 1097 struct tipc_nl_compat_msg msg; 1098 struct nlmsghdr *req_nlh; 1099 struct nlmsghdr *rep_nlh; 1100 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1101 1102 memset(&msg, 0, sizeof(msg)); 1103 1104 req_nlh = (struct nlmsghdr *)skb->data; 1105 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1106 msg.cmd = req_userhdr->cmd; 1107 msg.dst_sk = info->dst_sk; 1108 msg.net = genl_info_net(info); 1109 1110 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1111 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1112 err = -EACCES; 1113 goto send; 1114 } 1115 1116 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1117 if (len && !TLV_OK(msg.req, len)) { 1118 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1119 err = -EOPNOTSUPP; 1120 goto send; 1121 } 1122 1123 err = tipc_nl_compat_handle(&msg); 1124 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1125 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1126 else if (err == -EINVAL) 1127 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1128 send: 1129 if (!msg.rep) 1130 return err; 1131 1132 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1133 skb_push(msg.rep, len); 1134 rep_nlh = nlmsg_hdr(msg.rep); 1135 memcpy(rep_nlh, info->nlhdr, len); 1136 rep_nlh->nlmsg_len = msg.rep->len; 1137 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1138 1139 return err; 1140 } 1141 1142 static struct genl_family tipc_genl_compat_family = { 1143 .id = GENL_ID_GENERATE, 1144 .name = TIPC_GENL_NAME, 1145 .version = TIPC_GENL_VERSION, 1146 .hdrsize = TIPC_GENL_HDRLEN, 1147 .maxattr = 0, 1148 .netnsok = true, 1149 }; 1150 1151 static struct genl_ops tipc_genl_compat_ops[] = { 1152 { 1153 .cmd = TIPC_GENL_CMD, 1154 .doit = tipc_nl_compat_recv, 1155 }, 1156 }; 1157 1158 int tipc_netlink_compat_start(void) 1159 { 1160 int res; 1161 1162 res = genl_register_family_with_ops(&tipc_genl_compat_family, 1163 tipc_genl_compat_ops); 1164 if (res) { 1165 pr_err("Failed to register legacy compat interface\n"); 1166 return res; 1167 } 1168 1169 return 0; 1170 } 1171 1172 void tipc_netlink_compat_stop(void) 1173 { 1174 genl_unregister_family(&tipc_genl_compat_family); 1175 } 1176