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 int req_size; 59 struct net *net; 60 struct sk_buff *rep; 61 struct tlv_desc *req; 62 struct sock *dst_sk; 63 }; 64 65 struct tipc_nl_compat_cmd_dump { 66 int (*header)(struct tipc_nl_compat_msg *); 67 int (*dumpit)(struct sk_buff *, struct netlink_callback *); 68 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs); 69 }; 70 71 struct tipc_nl_compat_cmd_doit { 72 int (*doit)(struct sk_buff *skb, struct genl_info *info); 73 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd, 74 struct sk_buff *skb, struct tipc_nl_compat_msg *msg); 75 }; 76 77 static int tipc_skb_tailroom(struct sk_buff *skb) 78 { 79 int tailroom; 80 int limit; 81 82 tailroom = skb_tailroom(skb); 83 limit = TIPC_SKB_MAX - skb->len; 84 85 if (tailroom < limit) 86 return tailroom; 87 88 return limit; 89 } 90 91 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv) 92 { 93 return TLV_GET_LEN(tlv) - TLV_SPACE(0); 94 } 95 96 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) 97 { 98 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb); 99 100 if (tipc_skb_tailroom(skb) < TLV_SPACE(len)) 101 return -EMSGSIZE; 102 103 skb_put(skb, TLV_SPACE(len)); 104 tlv->tlv_type = htons(type); 105 tlv->tlv_len = htons(TLV_LENGTH(len)); 106 if (len && data) 107 memcpy(TLV_DATA(tlv), data, len); 108 109 return 0; 110 } 111 112 static void tipc_tlv_init(struct sk_buff *skb, u16 type) 113 { 114 struct tlv_desc *tlv = (struct tlv_desc *)skb->data; 115 116 TLV_SET_LEN(tlv, 0); 117 TLV_SET_TYPE(tlv, type); 118 skb_put(skb, sizeof(struct tlv_desc)); 119 } 120 121 static __printf(2, 3) int tipc_tlv_sprintf(struct sk_buff *skb, 122 const char *fmt, ...) 123 { 124 int n; 125 u16 len; 126 u32 rem; 127 char *buf; 128 struct tlv_desc *tlv; 129 va_list args; 130 131 rem = tipc_skb_tailroom(skb); 132 133 tlv = (struct tlv_desc *)skb->data; 134 len = TLV_GET_LEN(tlv); 135 buf = TLV_DATA(tlv) + len; 136 137 va_start(args, fmt); 138 n = vscnprintf(buf, rem, fmt, args); 139 va_end(args); 140 141 TLV_SET_LEN(tlv, n + len); 142 skb_put(skb, n); 143 144 return n; 145 } 146 147 static struct sk_buff *tipc_tlv_alloc(int size) 148 { 149 int hdr_len; 150 struct sk_buff *buf; 151 152 size = TLV_SPACE(size); 153 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 154 155 buf = alloc_skb(hdr_len + size, GFP_KERNEL); 156 if (!buf) 157 return NULL; 158 159 skb_reserve(buf, hdr_len); 160 161 return buf; 162 } 163 164 static struct sk_buff *tipc_get_err_tlv(char *str) 165 { 166 int str_len = strlen(str) + 1; 167 struct sk_buff *buf; 168 169 buf = tipc_tlv_alloc(TLV_SPACE(str_len)); 170 if (buf) 171 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len); 172 173 return buf; 174 } 175 176 static inline bool string_is_valid(char *s, int len) 177 { 178 return memchr(s, '\0', len) ? true : false; 179 } 180 181 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 182 struct tipc_nl_compat_msg *msg, 183 struct sk_buff *arg) 184 { 185 struct genl_dumpit_info info; 186 int len = 0; 187 int err; 188 struct sk_buff *buf; 189 struct nlmsghdr *nlmsg; 190 struct netlink_callback cb; 191 struct nlattr **attrbuf; 192 193 memset(&cb, 0, sizeof(cb)); 194 cb.nlh = (struct nlmsghdr *)arg->data; 195 cb.skb = arg; 196 cb.data = &info; 197 198 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 199 if (!buf) 200 return -ENOMEM; 201 202 buf->sk = msg->dst_sk; 203 if (__tipc_dump_start(&cb, msg->net)) { 204 kfree_skb(buf); 205 return -ENOMEM; 206 } 207 208 attrbuf = kcalloc(tipc_genl_family.maxattr + 1, 209 sizeof(struct nlattr *), GFP_KERNEL); 210 if (!attrbuf) { 211 err = -ENOMEM; 212 goto err_out; 213 } 214 215 info.attrs = attrbuf; 216 217 if (nlmsg_len(cb.nlh) > 0) { 218 err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf, 219 tipc_genl_family.maxattr, 220 tipc_genl_family.policy, NULL); 221 if (err) 222 goto err_out; 223 } 224 do { 225 int rem; 226 227 len = (*cmd->dumpit)(buf, &cb); 228 229 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { 230 err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN, 231 attrbuf, 232 tipc_genl_family.maxattr, 233 tipc_genl_family.policy, 234 NULL); 235 if (err) 236 goto err_out; 237 238 err = (*cmd->format)(msg, attrbuf); 239 if (err) 240 goto err_out; 241 242 if (tipc_skb_tailroom(msg->rep) <= 1) { 243 err = -EMSGSIZE; 244 goto err_out; 245 } 246 } 247 248 skb_reset_tail_pointer(buf); 249 buf->len = 0; 250 251 } while (len); 252 253 err = 0; 254 255 err_out: 256 kfree(attrbuf); 257 tipc_dump_done(&cb); 258 kfree_skb(buf); 259 260 if (err == -EMSGSIZE) { 261 /* The legacy API only considered messages filling 262 * "ULTRA_STRING_MAX_LEN" to be truncated. 263 */ 264 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { 265 char *tail = skb_tail_pointer(msg->rep); 266 267 if (*tail != '\0') 268 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, 269 REPLY_TRUNCATED); 270 } 271 272 return 0; 273 } 274 275 return err; 276 } 277 278 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 279 struct tipc_nl_compat_msg *msg) 280 { 281 struct nlmsghdr *nlh; 282 struct sk_buff *arg; 283 int err; 284 285 if (msg->req_type && (!msg->req_size || 286 !TLV_CHECK_TYPE(msg->req, msg->req_type))) 287 return -EINVAL; 288 289 msg->rep = tipc_tlv_alloc(msg->rep_size); 290 if (!msg->rep) 291 return -ENOMEM; 292 293 if (msg->rep_type) 294 tipc_tlv_init(msg->rep, msg->rep_type); 295 296 if (cmd->header) { 297 err = (*cmd->header)(msg); 298 if (err) { 299 kfree_skb(msg->rep); 300 msg->rep = NULL; 301 return err; 302 } 303 } 304 305 arg = nlmsg_new(0, GFP_KERNEL); 306 if (!arg) { 307 kfree_skb(msg->rep); 308 msg->rep = NULL; 309 return -ENOMEM; 310 } 311 312 nlh = nlmsg_put(arg, 0, 0, tipc_genl_family.id, 0, NLM_F_MULTI); 313 if (!nlh) { 314 kfree_skb(arg); 315 kfree_skb(msg->rep); 316 msg->rep = NULL; 317 return -EMSGSIZE; 318 } 319 nlmsg_end(arg, nlh); 320 321 err = __tipc_nl_compat_dumpit(cmd, msg, arg); 322 if (err) { 323 kfree_skb(msg->rep); 324 msg->rep = NULL; 325 } 326 kfree_skb(arg); 327 328 return err; 329 } 330 331 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 332 struct tipc_nl_compat_msg *msg) 333 { 334 int err; 335 struct sk_buff *doit_buf; 336 struct sk_buff *trans_buf; 337 struct nlattr **attrbuf; 338 struct genl_info info; 339 340 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 341 if (!trans_buf) 342 return -ENOMEM; 343 344 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1, 345 sizeof(struct nlattr *), 346 GFP_KERNEL); 347 if (!attrbuf) { 348 err = -ENOMEM; 349 goto trans_out; 350 } 351 352 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 353 if (!doit_buf) { 354 err = -ENOMEM; 355 goto attrbuf_out; 356 } 357 358 memset(&info, 0, sizeof(info)); 359 info.attrs = attrbuf; 360 361 rtnl_lock(); 362 err = (*cmd->transcode)(cmd, trans_buf, msg); 363 if (err) 364 goto doit_out; 365 366 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr, 367 (const struct nlattr *)trans_buf->data, 368 trans_buf->len, NULL, NULL); 369 if (err) 370 goto doit_out; 371 372 doit_buf->sk = msg->dst_sk; 373 374 err = (*cmd->doit)(doit_buf, &info); 375 doit_out: 376 rtnl_unlock(); 377 378 kfree_skb(doit_buf); 379 attrbuf_out: 380 kfree(attrbuf); 381 trans_out: 382 kfree_skb(trans_buf); 383 384 return err; 385 } 386 387 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 388 struct tipc_nl_compat_msg *msg) 389 { 390 int err; 391 392 if (msg->req_type && (!msg->req_size || 393 !TLV_CHECK_TYPE(msg->req, msg->req_type))) 394 return -EINVAL; 395 396 err = __tipc_nl_compat_doit(cmd, msg); 397 if (err) 398 return err; 399 400 /* The legacy API considered an empty message a success message */ 401 msg->rep = tipc_tlv_alloc(0); 402 if (!msg->rep) 403 return -ENOMEM; 404 405 return 0; 406 } 407 408 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, 409 struct nlattr **attrs) 410 { 411 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; 412 int err; 413 414 if (!attrs[TIPC_NLA_BEARER]) 415 return -EINVAL; 416 417 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX, 418 attrs[TIPC_NLA_BEARER], NULL, NULL); 419 if (err) 420 return err; 421 422 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, 423 nla_data(bearer[TIPC_NLA_BEARER_NAME]), 424 nla_len(bearer[TIPC_NLA_BEARER_NAME])); 425 } 426 427 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, 428 struct sk_buff *skb, 429 struct tipc_nl_compat_msg *msg) 430 { 431 struct nlattr *prop; 432 struct nlattr *bearer; 433 struct tipc_bearer_config *b; 434 int len; 435 436 b = (struct tipc_bearer_config *)TLV_DATA(msg->req); 437 438 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 439 if (!bearer) 440 return -EMSGSIZE; 441 442 len = TLV_GET_DATA_LEN(msg->req); 443 len -= offsetof(struct tipc_bearer_config, name); 444 if (len <= 0) 445 return -EINVAL; 446 447 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 448 if (!string_is_valid(b->name, len)) 449 return -EINVAL; 450 451 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) 452 return -EMSGSIZE; 453 454 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) 455 return -EMSGSIZE; 456 457 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { 458 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 459 if (!prop) 460 return -EMSGSIZE; 461 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) 462 return -EMSGSIZE; 463 nla_nest_end(skb, prop); 464 } 465 nla_nest_end(skb, bearer); 466 467 return 0; 468 } 469 470 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, 471 struct sk_buff *skb, 472 struct tipc_nl_compat_msg *msg) 473 { 474 char *name; 475 struct nlattr *bearer; 476 int len; 477 478 name = (char *)TLV_DATA(msg->req); 479 480 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 481 if (!bearer) 482 return -EMSGSIZE; 483 484 len = TLV_GET_DATA_LEN(msg->req); 485 if (len <= 0) 486 return -EINVAL; 487 488 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 489 if (!string_is_valid(name, len)) 490 return -EINVAL; 491 492 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 493 return -EMSGSIZE; 494 495 nla_nest_end(skb, bearer); 496 497 return 0; 498 } 499 500 static inline u32 perc(u32 count, u32 total) 501 { 502 return (count * 100 + (total / 2)) / total; 503 } 504 505 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 506 struct nlattr *prop[], struct nlattr *stats[]) 507 { 508 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 509 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 510 511 tipc_tlv_sprintf(msg->rep, 512 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 513 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 514 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 515 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 516 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 517 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 518 519 tipc_tlv_sprintf(msg->rep, 520 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 521 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 522 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 523 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 524 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 525 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 526 527 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 528 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 529 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 530 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 531 532 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 533 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 534 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 535 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 536 537 tipc_tlv_sprintf(msg->rep, 538 " Congestion link:%u Send queue max:%u avg:%u", 539 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 540 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 541 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 542 } 543 544 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 545 struct nlattr **attrs) 546 { 547 char *name; 548 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 549 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 550 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 551 int err; 552 int len; 553 554 if (!attrs[TIPC_NLA_LINK]) 555 return -EINVAL; 556 557 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 558 attrs[TIPC_NLA_LINK], NULL, NULL); 559 if (err) 560 return err; 561 562 if (!link[TIPC_NLA_LINK_PROP]) 563 return -EINVAL; 564 565 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX, 566 link[TIPC_NLA_LINK_PROP], NULL, 567 NULL); 568 if (err) 569 return err; 570 571 if (!link[TIPC_NLA_LINK_STATS]) 572 return -EINVAL; 573 574 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX, 575 link[TIPC_NLA_LINK_STATS], NULL, 576 NULL); 577 if (err) 578 return err; 579 580 name = (char *)TLV_DATA(msg->req); 581 582 len = TLV_GET_DATA_LEN(msg->req); 583 if (len <= 0) 584 return -EINVAL; 585 586 len = min_t(int, len, TIPC_MAX_LINK_NAME); 587 if (!string_is_valid(name, len)) 588 return -EINVAL; 589 590 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 591 return 0; 592 593 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 594 (char *)nla_data(link[TIPC_NLA_LINK_NAME])); 595 596 if (link[TIPC_NLA_LINK_BROADCAST]) { 597 __fill_bc_link_stat(msg, prop, stats); 598 return 0; 599 } 600 601 if (link[TIPC_NLA_LINK_ACTIVE]) 602 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 603 else if (link[TIPC_NLA_LINK_UP]) 604 tipc_tlv_sprintf(msg->rep, " STANDBY"); 605 else 606 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 607 608 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 609 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 610 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 611 612 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 613 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 614 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 615 616 tipc_tlv_sprintf(msg->rep, 617 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 618 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 619 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 620 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 621 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 622 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 623 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 624 625 tipc_tlv_sprintf(msg->rep, 626 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 627 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 628 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 629 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 630 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 631 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 632 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 633 634 tipc_tlv_sprintf(msg->rep, 635 " TX profile sample:%u packets average:%u octets\n", 636 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 637 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 638 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 639 640 tipc_tlv_sprintf(msg->rep, 641 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 642 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 643 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 644 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 645 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 646 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 647 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 648 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 649 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 650 651 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 652 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 653 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 654 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 655 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 656 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 657 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 658 659 tipc_tlv_sprintf(msg->rep, 660 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 661 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 662 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 663 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 664 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 665 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 666 667 tipc_tlv_sprintf(msg->rep, 668 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 669 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 670 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 671 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 672 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 673 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 674 675 tipc_tlv_sprintf(msg->rep, 676 " Congestion link:%u Send queue max:%u avg:%u", 677 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 678 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 679 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 680 681 return 0; 682 } 683 684 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 685 struct nlattr **attrs) 686 { 687 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 688 struct tipc_link_info link_info; 689 int err; 690 691 if (!attrs[TIPC_NLA_LINK]) 692 return -EINVAL; 693 694 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 695 attrs[TIPC_NLA_LINK], NULL, NULL); 696 if (err) 697 return err; 698 699 link_info.dest = htonl(nla_get_flag(link[TIPC_NLA_LINK_DEST])); 700 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 701 nla_strscpy(link_info.str, link[TIPC_NLA_LINK_NAME], 702 TIPC_MAX_LINK_NAME); 703 704 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 705 &link_info, sizeof(link_info)); 706 } 707 708 static int __tipc_add_link_prop(struct sk_buff *skb, 709 struct tipc_nl_compat_msg *msg, 710 struct tipc_link_config *lc) 711 { 712 switch (msg->cmd) { 713 case TIPC_CMD_SET_LINK_PRI: 714 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 715 case TIPC_CMD_SET_LINK_TOL: 716 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 717 case TIPC_CMD_SET_LINK_WINDOW: 718 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 719 } 720 721 return -EINVAL; 722 } 723 724 static int tipc_nl_compat_media_set(struct sk_buff *skb, 725 struct tipc_nl_compat_msg *msg) 726 { 727 struct nlattr *prop; 728 struct nlattr *media; 729 struct tipc_link_config *lc; 730 731 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 732 733 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA); 734 if (!media) 735 return -EMSGSIZE; 736 737 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 738 return -EMSGSIZE; 739 740 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP); 741 if (!prop) 742 return -EMSGSIZE; 743 744 __tipc_add_link_prop(skb, msg, lc); 745 nla_nest_end(skb, prop); 746 nla_nest_end(skb, media); 747 748 return 0; 749 } 750 751 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 752 struct tipc_nl_compat_msg *msg) 753 { 754 struct nlattr *prop; 755 struct nlattr *bearer; 756 struct tipc_link_config *lc; 757 758 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 759 760 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 761 if (!bearer) 762 return -EMSGSIZE; 763 764 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 765 return -EMSGSIZE; 766 767 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 768 if (!prop) 769 return -EMSGSIZE; 770 771 __tipc_add_link_prop(skb, msg, lc); 772 nla_nest_end(skb, prop); 773 nla_nest_end(skb, bearer); 774 775 return 0; 776 } 777 778 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 779 struct tipc_nl_compat_msg *msg) 780 { 781 struct nlattr *prop; 782 struct nlattr *link; 783 struct tipc_link_config *lc; 784 785 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 786 787 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 788 if (!link) 789 return -EMSGSIZE; 790 791 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 792 return -EMSGSIZE; 793 794 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP); 795 if (!prop) 796 return -EMSGSIZE; 797 798 __tipc_add_link_prop(skb, msg, lc); 799 nla_nest_end(skb, prop); 800 nla_nest_end(skb, link); 801 802 return 0; 803 } 804 805 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 806 struct sk_buff *skb, 807 struct tipc_nl_compat_msg *msg) 808 { 809 struct tipc_link_config *lc; 810 struct tipc_bearer *bearer; 811 struct tipc_media *media; 812 int len; 813 814 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 815 816 len = TLV_GET_DATA_LEN(msg->req); 817 len -= offsetof(struct tipc_link_config, name); 818 if (len <= 0) 819 return -EINVAL; 820 821 len = min_t(int, len, TIPC_MAX_LINK_NAME); 822 if (!string_is_valid(lc->name, len)) 823 return -EINVAL; 824 825 media = tipc_media_find(lc->name); 826 if (media) { 827 cmd->doit = &__tipc_nl_media_set; 828 return tipc_nl_compat_media_set(skb, msg); 829 } 830 831 bearer = tipc_bearer_find(msg->net, lc->name); 832 if (bearer) { 833 cmd->doit = &__tipc_nl_bearer_set; 834 return tipc_nl_compat_bearer_set(skb, msg); 835 } 836 837 return __tipc_nl_compat_link_set(skb, msg); 838 } 839 840 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 841 struct sk_buff *skb, 842 struct tipc_nl_compat_msg *msg) 843 { 844 char *name; 845 struct nlattr *link; 846 int len; 847 848 name = (char *)TLV_DATA(msg->req); 849 850 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 851 if (!link) 852 return -EMSGSIZE; 853 854 len = TLV_GET_DATA_LEN(msg->req); 855 if (len <= 0) 856 return -EINVAL; 857 858 len = min_t(int, len, TIPC_MAX_LINK_NAME); 859 if (!string_is_valid(name, len)) 860 return -EINVAL; 861 862 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 863 return -EMSGSIZE; 864 865 nla_nest_end(skb, link); 866 867 return 0; 868 } 869 870 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 871 { 872 int i; 873 u32 depth; 874 struct tipc_name_table_query *ntq; 875 static const char * const header[] = { 876 "Type ", 877 "Lower Upper ", 878 "Port Identity ", 879 "Publication Scope" 880 }; 881 882 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 883 if (TLV_GET_DATA_LEN(msg->req) < (int)sizeof(struct tipc_name_table_query)) 884 return -EINVAL; 885 886 depth = ntohl(ntq->depth); 887 888 if (depth > 4) 889 depth = 4; 890 for (i = 0; i < depth; i++) 891 tipc_tlv_sprintf(msg->rep, header[i]); 892 tipc_tlv_sprintf(msg->rep, "\n"); 893 894 return 0; 895 } 896 897 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 898 struct nlattr **attrs) 899 { 900 char port_str[27]; 901 struct tipc_name_table_query *ntq; 902 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 903 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 904 u32 node, depth, type, lowbound, upbound; 905 static const char * const scope_str[] = {"", " zone", " cluster", 906 " node"}; 907 int err; 908 909 if (!attrs[TIPC_NLA_NAME_TABLE]) 910 return -EINVAL; 911 912 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX, 913 attrs[TIPC_NLA_NAME_TABLE], NULL, 914 NULL); 915 if (err) 916 return err; 917 918 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 919 return -EINVAL; 920 921 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 922 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, 923 NULL); 924 if (err) 925 return err; 926 927 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 928 929 depth = ntohl(ntq->depth); 930 type = ntohl(ntq->type); 931 lowbound = ntohl(ntq->lowbound); 932 upbound = ntohl(ntq->upbound); 933 934 if (!(depth & TIPC_NTQ_ALLTYPES) && 935 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 936 return 0; 937 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 938 return 0; 939 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 940 return 0; 941 942 tipc_tlv_sprintf(msg->rep, "%-10u ", 943 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 944 945 if (depth == 1) 946 goto out; 947 948 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 949 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 950 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 951 952 if (depth == 2) 953 goto out; 954 955 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 956 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 957 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 958 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 959 960 if (depth == 3) 961 goto out; 962 963 tipc_tlv_sprintf(msg->rep, "%-10u %s", 964 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 965 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 966 out: 967 tipc_tlv_sprintf(msg->rep, "\n"); 968 969 return 0; 970 } 971 972 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 973 struct nlattr **attrs) 974 { 975 u32 type, lower, upper; 976 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 977 int err; 978 979 if (!attrs[TIPC_NLA_PUBL]) 980 return -EINVAL; 981 982 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 983 attrs[TIPC_NLA_PUBL], NULL, NULL); 984 if (err) 985 return err; 986 987 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 988 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 989 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 990 991 if (lower == upper) 992 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 993 else 994 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 995 996 return 0; 997 } 998 999 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 1000 { 1001 int err; 1002 void *hdr; 1003 struct nlattr *nest; 1004 struct sk_buff *args; 1005 struct tipc_nl_compat_cmd_dump dump; 1006 1007 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1008 if (!args) 1009 return -ENOMEM; 1010 1011 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 1012 TIPC_NL_PUBL_GET); 1013 if (!hdr) { 1014 kfree_skb(args); 1015 return -EMSGSIZE; 1016 } 1017 1018 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK); 1019 if (!nest) { 1020 kfree_skb(args); 1021 return -EMSGSIZE; 1022 } 1023 1024 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 1025 kfree_skb(args); 1026 return -EMSGSIZE; 1027 } 1028 1029 nla_nest_end(args, nest); 1030 genlmsg_end(args, hdr); 1031 1032 dump.dumpit = tipc_nl_publ_dump; 1033 dump.format = __tipc_nl_compat_publ_dump; 1034 1035 err = __tipc_nl_compat_dumpit(&dump, msg, args); 1036 1037 kfree_skb(args); 1038 1039 return err; 1040 } 1041 1042 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 1043 struct nlattr **attrs) 1044 { 1045 int err; 1046 u32 sock_ref; 1047 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 1048 1049 if (!attrs[TIPC_NLA_SOCK]) 1050 return -EINVAL; 1051 1052 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, 1053 attrs[TIPC_NLA_SOCK], NULL, NULL); 1054 if (err) 1055 return err; 1056 1057 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 1058 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 1059 1060 if (sock[TIPC_NLA_SOCK_CON]) { 1061 u32 node; 1062 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 1063 1064 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX, 1065 sock[TIPC_NLA_SOCK_CON], 1066 NULL, NULL); 1067 1068 if (err) 1069 return err; 1070 1071 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 1072 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 1073 tipc_zone(node), 1074 tipc_cluster(node), 1075 tipc_node(node), 1076 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 1077 1078 if (con[TIPC_NLA_CON_FLAG]) 1079 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 1080 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 1081 nla_get_u32(con[TIPC_NLA_CON_INST])); 1082 else 1083 tipc_tlv_sprintf(msg->rep, "\n"); 1084 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 1085 tipc_tlv_sprintf(msg->rep, " bound to"); 1086 1087 err = tipc_nl_compat_publ_dump(msg, sock_ref); 1088 if (err) 1089 return err; 1090 } 1091 tipc_tlv_sprintf(msg->rep, "\n"); 1092 1093 return 0; 1094 } 1095 1096 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 1097 struct nlattr **attrs) 1098 { 1099 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 1100 int err; 1101 1102 if (!attrs[TIPC_NLA_MEDIA]) 1103 return -EINVAL; 1104 1105 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX, 1106 attrs[TIPC_NLA_MEDIA], NULL, NULL); 1107 if (err) 1108 return err; 1109 1110 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 1111 nla_data(media[TIPC_NLA_MEDIA_NAME]), 1112 nla_len(media[TIPC_NLA_MEDIA_NAME])); 1113 } 1114 1115 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 1116 struct nlattr **attrs) 1117 { 1118 struct tipc_node_info node_info; 1119 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 1120 int err; 1121 1122 if (!attrs[TIPC_NLA_NODE]) 1123 return -EINVAL; 1124 1125 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX, 1126 attrs[TIPC_NLA_NODE], NULL, NULL); 1127 if (err) 1128 return err; 1129 1130 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1131 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1132 1133 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1134 sizeof(node_info)); 1135 } 1136 1137 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1138 struct sk_buff *skb, 1139 struct tipc_nl_compat_msg *msg) 1140 { 1141 u32 val; 1142 struct nlattr *net; 1143 1144 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1145 1146 net = nla_nest_start_noflag(skb, TIPC_NLA_NET); 1147 if (!net) 1148 return -EMSGSIZE; 1149 1150 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1151 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1152 return -EMSGSIZE; 1153 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1154 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1155 return -EMSGSIZE; 1156 } 1157 nla_nest_end(skb, net); 1158 1159 return 0; 1160 } 1161 1162 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1163 struct nlattr **attrs) 1164 { 1165 __be32 id; 1166 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1167 int err; 1168 1169 if (!attrs[TIPC_NLA_NET]) 1170 return -EINVAL; 1171 1172 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX, 1173 attrs[TIPC_NLA_NET], NULL, NULL); 1174 if (err) 1175 return err; 1176 1177 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1178 1179 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1180 } 1181 1182 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1183 { 1184 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1185 if (!msg->rep) 1186 return -ENOMEM; 1187 1188 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1189 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1190 1191 return 0; 1192 } 1193 1194 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1195 { 1196 struct tipc_nl_compat_cmd_dump dump; 1197 struct tipc_nl_compat_cmd_doit doit; 1198 1199 memset(&dump, 0, sizeof(dump)); 1200 memset(&doit, 0, sizeof(doit)); 1201 1202 switch (msg->cmd) { 1203 case TIPC_CMD_NOOP: 1204 msg->rep = tipc_tlv_alloc(0); 1205 if (!msg->rep) 1206 return -ENOMEM; 1207 return 0; 1208 case TIPC_CMD_GET_BEARER_NAMES: 1209 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1210 dump.dumpit = tipc_nl_bearer_dump; 1211 dump.format = tipc_nl_compat_bearer_dump; 1212 return tipc_nl_compat_dumpit(&dump, msg); 1213 case TIPC_CMD_ENABLE_BEARER: 1214 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1215 doit.doit = __tipc_nl_bearer_enable; 1216 doit.transcode = tipc_nl_compat_bearer_enable; 1217 return tipc_nl_compat_doit(&doit, msg); 1218 case TIPC_CMD_DISABLE_BEARER: 1219 msg->req_type = TIPC_TLV_BEARER_NAME; 1220 doit.doit = __tipc_nl_bearer_disable; 1221 doit.transcode = tipc_nl_compat_bearer_disable; 1222 return tipc_nl_compat_doit(&doit, msg); 1223 case TIPC_CMD_SHOW_LINK_STATS: 1224 msg->req_type = TIPC_TLV_LINK_NAME; 1225 msg->rep_size = ULTRA_STRING_MAX_LEN; 1226 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1227 dump.dumpit = tipc_nl_node_dump_link; 1228 dump.format = tipc_nl_compat_link_stat_dump; 1229 return tipc_nl_compat_dumpit(&dump, msg); 1230 case TIPC_CMD_GET_LINKS: 1231 msg->req_type = TIPC_TLV_NET_ADDR; 1232 msg->rep_size = ULTRA_STRING_MAX_LEN; 1233 dump.dumpit = tipc_nl_node_dump_link; 1234 dump.format = tipc_nl_compat_link_dump; 1235 return tipc_nl_compat_dumpit(&dump, msg); 1236 case TIPC_CMD_SET_LINK_TOL: 1237 case TIPC_CMD_SET_LINK_PRI: 1238 case TIPC_CMD_SET_LINK_WINDOW: 1239 msg->req_type = TIPC_TLV_LINK_CONFIG; 1240 doit.doit = tipc_nl_node_set_link; 1241 doit.transcode = tipc_nl_compat_link_set; 1242 return tipc_nl_compat_doit(&doit, msg); 1243 case TIPC_CMD_RESET_LINK_STATS: 1244 msg->req_type = TIPC_TLV_LINK_NAME; 1245 doit.doit = tipc_nl_node_reset_link_stats; 1246 doit.transcode = tipc_nl_compat_link_reset_stats; 1247 return tipc_nl_compat_doit(&doit, msg); 1248 case TIPC_CMD_SHOW_NAME_TABLE: 1249 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1250 msg->rep_size = ULTRA_STRING_MAX_LEN; 1251 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1252 dump.header = tipc_nl_compat_name_table_dump_header; 1253 dump.dumpit = tipc_nl_name_table_dump; 1254 dump.format = tipc_nl_compat_name_table_dump; 1255 return tipc_nl_compat_dumpit(&dump, msg); 1256 case TIPC_CMD_SHOW_PORTS: 1257 msg->rep_size = ULTRA_STRING_MAX_LEN; 1258 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1259 dump.dumpit = tipc_nl_sk_dump; 1260 dump.format = tipc_nl_compat_sk_dump; 1261 return tipc_nl_compat_dumpit(&dump, msg); 1262 case TIPC_CMD_GET_MEDIA_NAMES: 1263 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1264 dump.dumpit = tipc_nl_media_dump; 1265 dump.format = tipc_nl_compat_media_dump; 1266 return tipc_nl_compat_dumpit(&dump, msg); 1267 case TIPC_CMD_GET_NODES: 1268 msg->rep_size = ULTRA_STRING_MAX_LEN; 1269 dump.dumpit = tipc_nl_node_dump; 1270 dump.format = tipc_nl_compat_node_dump; 1271 return tipc_nl_compat_dumpit(&dump, msg); 1272 case TIPC_CMD_SET_NODE_ADDR: 1273 msg->req_type = TIPC_TLV_NET_ADDR; 1274 doit.doit = __tipc_nl_net_set; 1275 doit.transcode = tipc_nl_compat_net_set; 1276 return tipc_nl_compat_doit(&doit, msg); 1277 case TIPC_CMD_SET_NETID: 1278 msg->req_type = TIPC_TLV_UNSIGNED; 1279 doit.doit = __tipc_nl_net_set; 1280 doit.transcode = tipc_nl_compat_net_set; 1281 return tipc_nl_compat_doit(&doit, msg); 1282 case TIPC_CMD_GET_NETID: 1283 msg->rep_size = sizeof(u32); 1284 dump.dumpit = tipc_nl_net_dump; 1285 dump.format = tipc_nl_compat_net_dump; 1286 return tipc_nl_compat_dumpit(&dump, msg); 1287 case TIPC_CMD_SHOW_STATS: 1288 return tipc_cmd_show_stats_compat(msg); 1289 } 1290 1291 return -EOPNOTSUPP; 1292 } 1293 1294 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1295 { 1296 int err; 1297 int len; 1298 struct tipc_nl_compat_msg msg; 1299 struct nlmsghdr *req_nlh; 1300 struct nlmsghdr *rep_nlh; 1301 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1302 1303 memset(&msg, 0, sizeof(msg)); 1304 1305 req_nlh = (struct nlmsghdr *)skb->data; 1306 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1307 msg.cmd = req_userhdr->cmd; 1308 msg.net = genl_info_net(info); 1309 msg.dst_sk = skb->sk; 1310 1311 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1312 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1313 err = -EACCES; 1314 goto send; 1315 } 1316 1317 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1318 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) { 1319 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1320 err = -EOPNOTSUPP; 1321 goto send; 1322 } 1323 1324 err = tipc_nl_compat_handle(&msg); 1325 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1326 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1327 else if (err == -EINVAL) 1328 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1329 send: 1330 if (!msg.rep) 1331 return err; 1332 1333 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1334 skb_push(msg.rep, len); 1335 rep_nlh = nlmsg_hdr(msg.rep); 1336 memcpy(rep_nlh, info->nlhdr, len); 1337 rep_nlh->nlmsg_len = msg.rep->len; 1338 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1339 1340 return err; 1341 } 1342 1343 static const struct genl_small_ops tipc_genl_compat_ops[] = { 1344 { 1345 .cmd = TIPC_GENL_CMD, 1346 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1347 .doit = tipc_nl_compat_recv, 1348 }, 1349 }; 1350 1351 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1352 .name = TIPC_GENL_NAME, 1353 .version = TIPC_GENL_VERSION, 1354 .hdrsize = TIPC_GENL_HDRLEN, 1355 .maxattr = 0, 1356 .netnsok = true, 1357 .module = THIS_MODULE, 1358 .small_ops = tipc_genl_compat_ops, 1359 .n_small_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1360 .resv_start_op = TIPC_GENL_CMD + 1, 1361 }; 1362 1363 int __init tipc_netlink_compat_start(void) 1364 { 1365 int res; 1366 1367 res = genl_register_family(&tipc_genl_compat_family); 1368 if (res) { 1369 pr_err("Failed to register legacy compat interface\n"); 1370 return res; 1371 } 1372 1373 return 0; 1374 } 1375 1376 void tipc_netlink_compat_stop(void) 1377 { 1378 genl_unregister_family(&tipc_genl_compat_family); 1379 } 1380