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, 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 int err; 350 351 if (!attrs[TIPC_NLA_BEARER]) 352 return -EINVAL; 353 354 err = nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, 355 attrs[TIPC_NLA_BEARER], NULL, NULL); 356 if (err) 357 return err; 358 359 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, 360 nla_data(bearer[TIPC_NLA_BEARER_NAME]), 361 nla_len(bearer[TIPC_NLA_BEARER_NAME])); 362 } 363 364 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, 365 struct sk_buff *skb, 366 struct tipc_nl_compat_msg *msg) 367 { 368 struct nlattr *prop; 369 struct nlattr *bearer; 370 struct tipc_bearer_config *b; 371 372 b = (struct tipc_bearer_config *)TLV_DATA(msg->req); 373 374 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 375 if (!bearer) 376 return -EMSGSIZE; 377 378 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) 379 return -EMSGSIZE; 380 381 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) 382 return -EMSGSIZE; 383 384 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { 385 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); 386 if (!prop) 387 return -EMSGSIZE; 388 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) 389 return -EMSGSIZE; 390 nla_nest_end(skb, prop); 391 } 392 nla_nest_end(skb, bearer); 393 394 return 0; 395 } 396 397 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, 398 struct sk_buff *skb, 399 struct tipc_nl_compat_msg *msg) 400 { 401 char *name; 402 struct nlattr *bearer; 403 404 name = (char *)TLV_DATA(msg->req); 405 406 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 407 if (!bearer) 408 return -EMSGSIZE; 409 410 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 411 return -EMSGSIZE; 412 413 nla_nest_end(skb, bearer); 414 415 return 0; 416 } 417 418 static inline u32 perc(u32 count, u32 total) 419 { 420 return (count * 100 + (total / 2)) / total; 421 } 422 423 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 424 struct nlattr *prop[], struct nlattr *stats[]) 425 { 426 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 427 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 428 429 tipc_tlv_sprintf(msg->rep, 430 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 431 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 432 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 433 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 434 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 435 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 436 437 tipc_tlv_sprintf(msg->rep, 438 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 439 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 440 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 441 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 442 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 443 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 444 445 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 446 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 447 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 448 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 449 450 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 451 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 452 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 453 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 454 455 tipc_tlv_sprintf(msg->rep, 456 " Congestion link:%u Send queue max:%u avg:%u", 457 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 458 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 459 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 460 } 461 462 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 463 struct nlattr **attrs) 464 { 465 char *name; 466 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 467 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 468 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 469 int err; 470 471 if (!attrs[TIPC_NLA_LINK]) 472 return -EINVAL; 473 474 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], 475 NULL, NULL); 476 if (err) 477 return err; 478 479 if (!link[TIPC_NLA_LINK_PROP]) 480 return -EINVAL; 481 482 err = nla_parse_nested(prop, TIPC_NLA_PROP_MAX, 483 link[TIPC_NLA_LINK_PROP], NULL, NULL); 484 if (err) 485 return err; 486 487 if (!link[TIPC_NLA_LINK_STATS]) 488 return -EINVAL; 489 490 err = nla_parse_nested(stats, TIPC_NLA_STATS_MAX, 491 link[TIPC_NLA_LINK_STATS], NULL, NULL); 492 if (err) 493 return err; 494 495 name = (char *)TLV_DATA(msg->req); 496 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 497 return 0; 498 499 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 500 nla_data(link[TIPC_NLA_LINK_NAME])); 501 502 if (link[TIPC_NLA_LINK_BROADCAST]) { 503 __fill_bc_link_stat(msg, prop, stats); 504 return 0; 505 } 506 507 if (link[TIPC_NLA_LINK_ACTIVE]) 508 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 509 else if (link[TIPC_NLA_LINK_UP]) 510 tipc_tlv_sprintf(msg->rep, " STANDBY"); 511 else 512 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 513 514 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 515 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 516 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 517 518 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 519 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 520 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 521 522 tipc_tlv_sprintf(msg->rep, 523 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 524 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 525 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 526 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 527 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 528 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 529 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 530 531 tipc_tlv_sprintf(msg->rep, 532 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 533 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 534 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 535 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 536 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 537 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 538 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 539 540 tipc_tlv_sprintf(msg->rep, 541 " TX profile sample:%u packets average:%u octets\n", 542 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 543 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 544 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 545 546 tipc_tlv_sprintf(msg->rep, 547 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 548 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 549 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 550 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 551 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 552 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 553 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 554 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 555 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 556 557 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 558 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 559 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 560 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 561 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 562 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 563 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 564 565 tipc_tlv_sprintf(msg->rep, 566 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 567 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 568 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 569 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 570 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 571 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 572 573 tipc_tlv_sprintf(msg->rep, 574 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 575 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 576 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 577 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 578 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 579 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 580 581 tipc_tlv_sprintf(msg->rep, 582 " Congestion link:%u Send queue max:%u avg:%u", 583 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 584 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 585 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 586 587 return 0; 588 } 589 590 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 591 struct nlattr **attrs) 592 { 593 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 594 struct tipc_link_info link_info; 595 int err; 596 597 if (!attrs[TIPC_NLA_LINK]) 598 return -EINVAL; 599 600 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], 601 NULL, NULL); 602 if (err) 603 return err; 604 605 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); 606 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 607 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME], 608 TIPC_MAX_LINK_NAME); 609 610 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 611 &link_info, sizeof(link_info)); 612 } 613 614 static int __tipc_add_link_prop(struct sk_buff *skb, 615 struct tipc_nl_compat_msg *msg, 616 struct tipc_link_config *lc) 617 { 618 switch (msg->cmd) { 619 case TIPC_CMD_SET_LINK_PRI: 620 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 621 case TIPC_CMD_SET_LINK_TOL: 622 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 623 case TIPC_CMD_SET_LINK_WINDOW: 624 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 625 } 626 627 return -EINVAL; 628 } 629 630 static int tipc_nl_compat_media_set(struct sk_buff *skb, 631 struct tipc_nl_compat_msg *msg) 632 { 633 struct nlattr *prop; 634 struct nlattr *media; 635 struct tipc_link_config *lc; 636 637 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 638 639 media = nla_nest_start(skb, TIPC_NLA_MEDIA); 640 if (!media) 641 return -EMSGSIZE; 642 643 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 644 return -EMSGSIZE; 645 646 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP); 647 if (!prop) 648 return -EMSGSIZE; 649 650 __tipc_add_link_prop(skb, msg, lc); 651 nla_nest_end(skb, prop); 652 nla_nest_end(skb, media); 653 654 return 0; 655 } 656 657 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 658 struct tipc_nl_compat_msg *msg) 659 { 660 struct nlattr *prop; 661 struct nlattr *bearer; 662 struct tipc_link_config *lc; 663 664 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 665 666 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 667 if (!bearer) 668 return -EMSGSIZE; 669 670 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 671 return -EMSGSIZE; 672 673 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); 674 if (!prop) 675 return -EMSGSIZE; 676 677 __tipc_add_link_prop(skb, msg, lc); 678 nla_nest_end(skb, prop); 679 nla_nest_end(skb, bearer); 680 681 return 0; 682 } 683 684 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 685 struct tipc_nl_compat_msg *msg) 686 { 687 struct nlattr *prop; 688 struct nlattr *link; 689 struct tipc_link_config *lc; 690 691 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 692 693 link = nla_nest_start(skb, TIPC_NLA_LINK); 694 if (!link) 695 return -EMSGSIZE; 696 697 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 698 return -EMSGSIZE; 699 700 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP); 701 if (!prop) 702 return -EMSGSIZE; 703 704 __tipc_add_link_prop(skb, msg, lc); 705 nla_nest_end(skb, prop); 706 nla_nest_end(skb, link); 707 708 return 0; 709 } 710 711 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 712 struct sk_buff *skb, 713 struct tipc_nl_compat_msg *msg) 714 { 715 struct tipc_link_config *lc; 716 struct tipc_bearer *bearer; 717 struct tipc_media *media; 718 719 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 720 721 media = tipc_media_find(lc->name); 722 if (media) { 723 cmd->doit = &tipc_nl_media_set; 724 return tipc_nl_compat_media_set(skb, msg); 725 } 726 727 bearer = tipc_bearer_find(msg->net, lc->name); 728 if (bearer) { 729 cmd->doit = &tipc_nl_bearer_set; 730 return tipc_nl_compat_bearer_set(skb, msg); 731 } 732 733 return __tipc_nl_compat_link_set(skb, msg); 734 } 735 736 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 737 struct sk_buff *skb, 738 struct tipc_nl_compat_msg *msg) 739 { 740 char *name; 741 struct nlattr *link; 742 743 name = (char *)TLV_DATA(msg->req); 744 745 link = nla_nest_start(skb, TIPC_NLA_LINK); 746 if (!link) 747 return -EMSGSIZE; 748 749 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 750 return -EMSGSIZE; 751 752 nla_nest_end(skb, link); 753 754 return 0; 755 } 756 757 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 758 { 759 int i; 760 u32 depth; 761 struct tipc_name_table_query *ntq; 762 static const char * const header[] = { 763 "Type ", 764 "Lower Upper ", 765 "Port Identity ", 766 "Publication Scope" 767 }; 768 769 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 770 771 depth = ntohl(ntq->depth); 772 773 if (depth > 4) 774 depth = 4; 775 for (i = 0; i < depth; i++) 776 tipc_tlv_sprintf(msg->rep, header[i]); 777 tipc_tlv_sprintf(msg->rep, "\n"); 778 779 return 0; 780 } 781 782 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 783 struct nlattr **attrs) 784 { 785 char port_str[27]; 786 struct tipc_name_table_query *ntq; 787 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 788 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 789 u32 node, depth, type, lowbound, upbound; 790 static const char * const scope_str[] = {"", " zone", " cluster", 791 " node"}; 792 int err; 793 794 if (!attrs[TIPC_NLA_NAME_TABLE]) 795 return -EINVAL; 796 797 err = nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX, 798 attrs[TIPC_NLA_NAME_TABLE], NULL, NULL); 799 if (err) 800 return err; 801 802 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 803 return -EINVAL; 804 805 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, 806 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, NULL); 807 if (err) 808 return err; 809 810 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 811 812 depth = ntohl(ntq->depth); 813 type = ntohl(ntq->type); 814 lowbound = ntohl(ntq->lowbound); 815 upbound = ntohl(ntq->upbound); 816 817 if (!(depth & TIPC_NTQ_ALLTYPES) && 818 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 819 return 0; 820 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 821 return 0; 822 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 823 return 0; 824 825 tipc_tlv_sprintf(msg->rep, "%-10u ", 826 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 827 828 if (depth == 1) 829 goto out; 830 831 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 832 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 833 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 834 835 if (depth == 2) 836 goto out; 837 838 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 839 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 840 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 841 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 842 843 if (depth == 3) 844 goto out; 845 846 tipc_tlv_sprintf(msg->rep, "%-10u %s", 847 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 848 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 849 out: 850 tipc_tlv_sprintf(msg->rep, "\n"); 851 852 return 0; 853 } 854 855 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 856 struct nlattr **attrs) 857 { 858 u32 type, lower, upper; 859 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 860 int err; 861 862 if (!attrs[TIPC_NLA_PUBL]) 863 return -EINVAL; 864 865 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], 866 NULL, NULL); 867 if (err) 868 return err; 869 870 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 871 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 872 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 873 874 if (lower == upper) 875 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 876 else 877 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 878 879 return 0; 880 } 881 882 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 883 { 884 int err; 885 void *hdr; 886 struct nlattr *nest; 887 struct sk_buff *args; 888 struct tipc_nl_compat_cmd_dump dump; 889 890 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 891 if (!args) 892 return -ENOMEM; 893 894 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 895 TIPC_NL_PUBL_GET); 896 897 nest = nla_nest_start(args, TIPC_NLA_SOCK); 898 if (!nest) { 899 kfree_skb(args); 900 return -EMSGSIZE; 901 } 902 903 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 904 kfree_skb(args); 905 return -EMSGSIZE; 906 } 907 908 nla_nest_end(args, nest); 909 genlmsg_end(args, hdr); 910 911 dump.dumpit = tipc_nl_publ_dump; 912 dump.format = __tipc_nl_compat_publ_dump; 913 914 err = __tipc_nl_compat_dumpit(&dump, msg, args); 915 916 kfree_skb(args); 917 918 return err; 919 } 920 921 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 922 struct nlattr **attrs) 923 { 924 int err; 925 u32 sock_ref; 926 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 927 928 if (!attrs[TIPC_NLA_SOCK]) 929 return -EINVAL; 930 931 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], 932 NULL, NULL); 933 if (err) 934 return err; 935 936 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 937 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 938 939 if (sock[TIPC_NLA_SOCK_CON]) { 940 u32 node; 941 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 942 943 nla_parse_nested(con, TIPC_NLA_CON_MAX, 944 sock[TIPC_NLA_SOCK_CON], NULL, NULL); 945 946 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 947 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 948 tipc_zone(node), 949 tipc_cluster(node), 950 tipc_node(node), 951 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 952 953 if (con[TIPC_NLA_CON_FLAG]) 954 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 955 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 956 nla_get_u32(con[TIPC_NLA_CON_INST])); 957 else 958 tipc_tlv_sprintf(msg->rep, "\n"); 959 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 960 tipc_tlv_sprintf(msg->rep, " bound to"); 961 962 err = tipc_nl_compat_publ_dump(msg, sock_ref); 963 if (err) 964 return err; 965 } 966 tipc_tlv_sprintf(msg->rep, "\n"); 967 968 return 0; 969 } 970 971 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 972 struct nlattr **attrs) 973 { 974 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 975 int err; 976 977 if (!attrs[TIPC_NLA_MEDIA]) 978 return -EINVAL; 979 980 err = nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, 981 attrs[TIPC_NLA_MEDIA], NULL, NULL); 982 if (err) 983 return err; 984 985 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 986 nla_data(media[TIPC_NLA_MEDIA_NAME]), 987 nla_len(media[TIPC_NLA_MEDIA_NAME])); 988 } 989 990 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 991 struct nlattr **attrs) 992 { 993 struct tipc_node_info node_info; 994 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 995 int err; 996 997 if (!attrs[TIPC_NLA_NODE]) 998 return -EINVAL; 999 1000 err = nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], 1001 NULL, NULL); 1002 if (err) 1003 return err; 1004 1005 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1006 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1007 1008 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1009 sizeof(node_info)); 1010 } 1011 1012 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1013 struct sk_buff *skb, 1014 struct tipc_nl_compat_msg *msg) 1015 { 1016 u32 val; 1017 struct nlattr *net; 1018 1019 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1020 1021 net = nla_nest_start(skb, TIPC_NLA_NET); 1022 if (!net) 1023 return -EMSGSIZE; 1024 1025 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1026 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1027 return -EMSGSIZE; 1028 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1029 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1030 return -EMSGSIZE; 1031 } 1032 nla_nest_end(skb, net); 1033 1034 return 0; 1035 } 1036 1037 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1038 struct nlattr **attrs) 1039 { 1040 __be32 id; 1041 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1042 int err; 1043 1044 if (!attrs[TIPC_NLA_NET]) 1045 return -EINVAL; 1046 1047 err = nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], 1048 NULL, NULL); 1049 if (err) 1050 return err; 1051 1052 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1053 1054 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1055 } 1056 1057 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1058 { 1059 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1060 if (!msg->rep) 1061 return -ENOMEM; 1062 1063 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1064 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1065 1066 return 0; 1067 } 1068 1069 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1070 { 1071 struct tipc_nl_compat_cmd_dump dump; 1072 struct tipc_nl_compat_cmd_doit doit; 1073 1074 memset(&dump, 0, sizeof(dump)); 1075 memset(&doit, 0, sizeof(doit)); 1076 1077 switch (msg->cmd) { 1078 case TIPC_CMD_NOOP: 1079 msg->rep = tipc_tlv_alloc(0); 1080 if (!msg->rep) 1081 return -ENOMEM; 1082 return 0; 1083 case TIPC_CMD_GET_BEARER_NAMES: 1084 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1085 dump.dumpit = tipc_nl_bearer_dump; 1086 dump.format = tipc_nl_compat_bearer_dump; 1087 return tipc_nl_compat_dumpit(&dump, msg); 1088 case TIPC_CMD_ENABLE_BEARER: 1089 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1090 doit.doit = tipc_nl_bearer_enable; 1091 doit.transcode = tipc_nl_compat_bearer_enable; 1092 return tipc_nl_compat_doit(&doit, msg); 1093 case TIPC_CMD_DISABLE_BEARER: 1094 msg->req_type = TIPC_TLV_BEARER_NAME; 1095 doit.doit = tipc_nl_bearer_disable; 1096 doit.transcode = tipc_nl_compat_bearer_disable; 1097 return tipc_nl_compat_doit(&doit, msg); 1098 case TIPC_CMD_SHOW_LINK_STATS: 1099 msg->req_type = TIPC_TLV_LINK_NAME; 1100 msg->rep_size = ULTRA_STRING_MAX_LEN; 1101 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1102 dump.dumpit = tipc_nl_node_dump_link; 1103 dump.format = tipc_nl_compat_link_stat_dump; 1104 return tipc_nl_compat_dumpit(&dump, msg); 1105 case TIPC_CMD_GET_LINKS: 1106 msg->req_type = TIPC_TLV_NET_ADDR; 1107 msg->rep_size = ULTRA_STRING_MAX_LEN; 1108 dump.dumpit = tipc_nl_node_dump_link; 1109 dump.format = tipc_nl_compat_link_dump; 1110 return tipc_nl_compat_dumpit(&dump, msg); 1111 case TIPC_CMD_SET_LINK_TOL: 1112 case TIPC_CMD_SET_LINK_PRI: 1113 case TIPC_CMD_SET_LINK_WINDOW: 1114 msg->req_type = TIPC_TLV_LINK_CONFIG; 1115 doit.doit = tipc_nl_node_set_link; 1116 doit.transcode = tipc_nl_compat_link_set; 1117 return tipc_nl_compat_doit(&doit, msg); 1118 case TIPC_CMD_RESET_LINK_STATS: 1119 msg->req_type = TIPC_TLV_LINK_NAME; 1120 doit.doit = tipc_nl_node_reset_link_stats; 1121 doit.transcode = tipc_nl_compat_link_reset_stats; 1122 return tipc_nl_compat_doit(&doit, msg); 1123 case TIPC_CMD_SHOW_NAME_TABLE: 1124 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1125 msg->rep_size = ULTRA_STRING_MAX_LEN; 1126 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1127 dump.header = tipc_nl_compat_name_table_dump_header; 1128 dump.dumpit = tipc_nl_name_table_dump; 1129 dump.format = tipc_nl_compat_name_table_dump; 1130 return tipc_nl_compat_dumpit(&dump, msg); 1131 case TIPC_CMD_SHOW_PORTS: 1132 msg->rep_size = ULTRA_STRING_MAX_LEN; 1133 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1134 dump.dumpit = tipc_nl_sk_dump; 1135 dump.format = tipc_nl_compat_sk_dump; 1136 return tipc_nl_compat_dumpit(&dump, msg); 1137 case TIPC_CMD_GET_MEDIA_NAMES: 1138 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1139 dump.dumpit = tipc_nl_media_dump; 1140 dump.format = tipc_nl_compat_media_dump; 1141 return tipc_nl_compat_dumpit(&dump, msg); 1142 case TIPC_CMD_GET_NODES: 1143 msg->rep_size = ULTRA_STRING_MAX_LEN; 1144 dump.dumpit = tipc_nl_node_dump; 1145 dump.format = tipc_nl_compat_node_dump; 1146 return tipc_nl_compat_dumpit(&dump, msg); 1147 case TIPC_CMD_SET_NODE_ADDR: 1148 msg->req_type = TIPC_TLV_NET_ADDR; 1149 doit.doit = tipc_nl_net_set; 1150 doit.transcode = tipc_nl_compat_net_set; 1151 return tipc_nl_compat_doit(&doit, msg); 1152 case TIPC_CMD_SET_NETID: 1153 msg->req_type = TIPC_TLV_UNSIGNED; 1154 doit.doit = tipc_nl_net_set; 1155 doit.transcode = tipc_nl_compat_net_set; 1156 return tipc_nl_compat_doit(&doit, msg); 1157 case TIPC_CMD_GET_NETID: 1158 msg->rep_size = sizeof(u32); 1159 dump.dumpit = tipc_nl_net_dump; 1160 dump.format = tipc_nl_compat_net_dump; 1161 return tipc_nl_compat_dumpit(&dump, msg); 1162 case TIPC_CMD_SHOW_STATS: 1163 return tipc_cmd_show_stats_compat(msg); 1164 } 1165 1166 return -EOPNOTSUPP; 1167 } 1168 1169 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1170 { 1171 int err; 1172 int len; 1173 struct tipc_nl_compat_msg msg; 1174 struct nlmsghdr *req_nlh; 1175 struct nlmsghdr *rep_nlh; 1176 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1177 1178 memset(&msg, 0, sizeof(msg)); 1179 1180 req_nlh = (struct nlmsghdr *)skb->data; 1181 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1182 msg.cmd = req_userhdr->cmd; 1183 msg.net = genl_info_net(info); 1184 msg.dst_sk = skb->sk; 1185 1186 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1187 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1188 err = -EACCES; 1189 goto send; 1190 } 1191 1192 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1193 if (len && !TLV_OK(msg.req, len)) { 1194 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1195 err = -EOPNOTSUPP; 1196 goto send; 1197 } 1198 1199 err = tipc_nl_compat_handle(&msg); 1200 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1201 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1202 else if (err == -EINVAL) 1203 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1204 send: 1205 if (!msg.rep) 1206 return err; 1207 1208 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1209 skb_push(msg.rep, len); 1210 rep_nlh = nlmsg_hdr(msg.rep); 1211 memcpy(rep_nlh, info->nlhdr, len); 1212 rep_nlh->nlmsg_len = msg.rep->len; 1213 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1214 1215 return err; 1216 } 1217 1218 static struct genl_ops tipc_genl_compat_ops[] = { 1219 { 1220 .cmd = TIPC_GENL_CMD, 1221 .doit = tipc_nl_compat_recv, 1222 }, 1223 }; 1224 1225 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1226 .name = TIPC_GENL_NAME, 1227 .version = TIPC_GENL_VERSION, 1228 .hdrsize = TIPC_GENL_HDRLEN, 1229 .maxattr = 0, 1230 .netnsok = true, 1231 .module = THIS_MODULE, 1232 .ops = tipc_genl_compat_ops, 1233 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1234 }; 1235 1236 int __init tipc_netlink_compat_start(void) 1237 { 1238 int res; 1239 1240 res = genl_register_family(&tipc_genl_compat_family); 1241 if (res) { 1242 pr_err("Failed to register legacy compat interface\n"); 1243 return res; 1244 } 1245 1246 return 0; 1247 } 1248 1249 void tipc_netlink_compat_stop(void) 1250 { 1251 genl_unregister_family(&tipc_genl_compat_family); 1252 } 1253