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