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