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 = TLV_GET_DATA_LEN(msg->req); 449 if (len <= 0) 450 return -EINVAL; 451 452 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 453 if (!string_is_valid(name, len)) 454 return -EINVAL; 455 456 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 457 return -EMSGSIZE; 458 459 nla_nest_end(skb, bearer); 460 461 return 0; 462 } 463 464 static inline u32 perc(u32 count, u32 total) 465 { 466 return (count * 100 + (total / 2)) / total; 467 } 468 469 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 470 struct nlattr *prop[], struct nlattr *stats[]) 471 { 472 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 473 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 474 475 tipc_tlv_sprintf(msg->rep, 476 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 477 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 478 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 479 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 480 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 481 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 482 483 tipc_tlv_sprintf(msg->rep, 484 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 485 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 486 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 487 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 488 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 489 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 490 491 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 492 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 493 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 494 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 495 496 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 497 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 498 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 499 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 500 501 tipc_tlv_sprintf(msg->rep, 502 " Congestion link:%u Send queue max:%u avg:%u", 503 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 504 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 505 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 506 } 507 508 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 509 struct nlattr **attrs) 510 { 511 char *name; 512 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 513 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 514 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 515 int err; 516 int len; 517 518 if (!attrs[TIPC_NLA_LINK]) 519 return -EINVAL; 520 521 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 522 attrs[TIPC_NLA_LINK], NULL, NULL); 523 if (err) 524 return err; 525 526 if (!link[TIPC_NLA_LINK_PROP]) 527 return -EINVAL; 528 529 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX, 530 link[TIPC_NLA_LINK_PROP], NULL, 531 NULL); 532 if (err) 533 return err; 534 535 if (!link[TIPC_NLA_LINK_STATS]) 536 return -EINVAL; 537 538 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX, 539 link[TIPC_NLA_LINK_STATS], NULL, 540 NULL); 541 if (err) 542 return err; 543 544 name = (char *)TLV_DATA(msg->req); 545 546 len = TLV_GET_DATA_LEN(msg->req); 547 if (len <= 0) 548 return -EINVAL; 549 550 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 551 if (!string_is_valid(name, len)) 552 return -EINVAL; 553 554 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 555 return 0; 556 557 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 558 nla_data(link[TIPC_NLA_LINK_NAME])); 559 560 if (link[TIPC_NLA_LINK_BROADCAST]) { 561 __fill_bc_link_stat(msg, prop, stats); 562 return 0; 563 } 564 565 if (link[TIPC_NLA_LINK_ACTIVE]) 566 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 567 else if (link[TIPC_NLA_LINK_UP]) 568 tipc_tlv_sprintf(msg->rep, " STANDBY"); 569 else 570 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 571 572 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 573 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 574 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 575 576 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 577 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 578 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 579 580 tipc_tlv_sprintf(msg->rep, 581 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 582 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 583 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 584 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 585 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 586 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 587 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 588 589 tipc_tlv_sprintf(msg->rep, 590 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 591 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 592 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 593 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 594 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 595 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 596 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 597 598 tipc_tlv_sprintf(msg->rep, 599 " TX profile sample:%u packets average:%u octets\n", 600 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 601 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 602 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 603 604 tipc_tlv_sprintf(msg->rep, 605 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 606 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 607 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 608 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 609 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 610 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 611 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 612 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 613 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 614 615 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 616 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 617 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 618 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 619 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 620 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 621 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 622 623 tipc_tlv_sprintf(msg->rep, 624 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 625 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 626 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 627 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 628 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 629 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 630 631 tipc_tlv_sprintf(msg->rep, 632 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 633 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 634 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 635 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 636 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 637 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 638 639 tipc_tlv_sprintf(msg->rep, 640 " Congestion link:%u Send queue max:%u avg:%u", 641 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 642 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 643 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 644 645 return 0; 646 } 647 648 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 649 struct nlattr **attrs) 650 { 651 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 652 struct tipc_link_info link_info; 653 int err; 654 655 if (!attrs[TIPC_NLA_LINK]) 656 return -EINVAL; 657 658 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 659 attrs[TIPC_NLA_LINK], NULL, NULL); 660 if (err) 661 return err; 662 663 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); 664 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 665 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME], 666 TIPC_MAX_LINK_NAME); 667 668 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 669 &link_info, sizeof(link_info)); 670 } 671 672 static int __tipc_add_link_prop(struct sk_buff *skb, 673 struct tipc_nl_compat_msg *msg, 674 struct tipc_link_config *lc) 675 { 676 switch (msg->cmd) { 677 case TIPC_CMD_SET_LINK_PRI: 678 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 679 case TIPC_CMD_SET_LINK_TOL: 680 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 681 case TIPC_CMD_SET_LINK_WINDOW: 682 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 683 } 684 685 return -EINVAL; 686 } 687 688 static int tipc_nl_compat_media_set(struct sk_buff *skb, 689 struct tipc_nl_compat_msg *msg) 690 { 691 struct nlattr *prop; 692 struct nlattr *media; 693 struct tipc_link_config *lc; 694 int len; 695 696 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 697 698 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA); 699 if (!media) 700 return -EMSGSIZE; 701 702 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME); 703 if (!string_is_valid(lc->name, len)) 704 return -EINVAL; 705 706 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 707 return -EMSGSIZE; 708 709 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP); 710 if (!prop) 711 return -EMSGSIZE; 712 713 __tipc_add_link_prop(skb, msg, lc); 714 nla_nest_end(skb, prop); 715 nla_nest_end(skb, media); 716 717 return 0; 718 } 719 720 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 721 struct tipc_nl_compat_msg *msg) 722 { 723 struct nlattr *prop; 724 struct nlattr *bearer; 725 struct tipc_link_config *lc; 726 int len; 727 728 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 729 730 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 731 if (!bearer) 732 return -EMSGSIZE; 733 734 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME); 735 if (!string_is_valid(lc->name, len)) 736 return -EINVAL; 737 738 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 739 return -EMSGSIZE; 740 741 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 742 if (!prop) 743 return -EMSGSIZE; 744 745 __tipc_add_link_prop(skb, msg, lc); 746 nla_nest_end(skb, prop); 747 nla_nest_end(skb, bearer); 748 749 return 0; 750 } 751 752 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 753 struct tipc_nl_compat_msg *msg) 754 { 755 struct nlattr *prop; 756 struct nlattr *link; 757 struct tipc_link_config *lc; 758 759 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 760 761 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 762 if (!link) 763 return -EMSGSIZE; 764 765 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 766 return -EMSGSIZE; 767 768 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP); 769 if (!prop) 770 return -EMSGSIZE; 771 772 __tipc_add_link_prop(skb, msg, lc); 773 nla_nest_end(skb, prop); 774 nla_nest_end(skb, link); 775 776 return 0; 777 } 778 779 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 780 struct sk_buff *skb, 781 struct tipc_nl_compat_msg *msg) 782 { 783 struct tipc_link_config *lc; 784 struct tipc_bearer *bearer; 785 struct tipc_media *media; 786 int len; 787 788 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 789 790 len = TLV_GET_DATA_LEN(msg->req); 791 len -= offsetof(struct tipc_link_config, name); 792 if (len <= 0) 793 return -EINVAL; 794 795 len = min_t(int, len, TIPC_MAX_LINK_NAME); 796 if (!string_is_valid(lc->name, len)) 797 return -EINVAL; 798 799 media = tipc_media_find(lc->name); 800 if (media) { 801 cmd->doit = &__tipc_nl_media_set; 802 return tipc_nl_compat_media_set(skb, msg); 803 } 804 805 bearer = tipc_bearer_find(msg->net, lc->name); 806 if (bearer) { 807 cmd->doit = &__tipc_nl_bearer_set; 808 return tipc_nl_compat_bearer_set(skb, msg); 809 } 810 811 return __tipc_nl_compat_link_set(skb, msg); 812 } 813 814 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 815 struct sk_buff *skb, 816 struct tipc_nl_compat_msg *msg) 817 { 818 char *name; 819 struct nlattr *link; 820 int len; 821 822 name = (char *)TLV_DATA(msg->req); 823 824 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 825 if (!link) 826 return -EMSGSIZE; 827 828 len = TLV_GET_DATA_LEN(msg->req); 829 if (len <= 0) 830 return -EINVAL; 831 832 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 833 if (!string_is_valid(name, len)) 834 return -EINVAL; 835 836 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 837 return -EMSGSIZE; 838 839 nla_nest_end(skb, link); 840 841 return 0; 842 } 843 844 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 845 { 846 int i; 847 u32 depth; 848 struct tipc_name_table_query *ntq; 849 static const char * const header[] = { 850 "Type ", 851 "Lower Upper ", 852 "Port Identity ", 853 "Publication Scope" 854 }; 855 856 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 857 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query)) 858 return -EINVAL; 859 860 depth = ntohl(ntq->depth); 861 862 if (depth > 4) 863 depth = 4; 864 for (i = 0; i < depth; i++) 865 tipc_tlv_sprintf(msg->rep, header[i]); 866 tipc_tlv_sprintf(msg->rep, "\n"); 867 868 return 0; 869 } 870 871 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 872 struct nlattr **attrs) 873 { 874 char port_str[27]; 875 struct tipc_name_table_query *ntq; 876 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 877 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 878 u32 node, depth, type, lowbound, upbound; 879 static const char * const scope_str[] = {"", " zone", " cluster", 880 " node"}; 881 int err; 882 883 if (!attrs[TIPC_NLA_NAME_TABLE]) 884 return -EINVAL; 885 886 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX, 887 attrs[TIPC_NLA_NAME_TABLE], NULL, 888 NULL); 889 if (err) 890 return err; 891 892 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 893 return -EINVAL; 894 895 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 896 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, 897 NULL); 898 if (err) 899 return err; 900 901 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 902 903 depth = ntohl(ntq->depth); 904 type = ntohl(ntq->type); 905 lowbound = ntohl(ntq->lowbound); 906 upbound = ntohl(ntq->upbound); 907 908 if (!(depth & TIPC_NTQ_ALLTYPES) && 909 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 910 return 0; 911 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 912 return 0; 913 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 914 return 0; 915 916 tipc_tlv_sprintf(msg->rep, "%-10u ", 917 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 918 919 if (depth == 1) 920 goto out; 921 922 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 923 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 924 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 925 926 if (depth == 2) 927 goto out; 928 929 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 930 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 931 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 932 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 933 934 if (depth == 3) 935 goto out; 936 937 tipc_tlv_sprintf(msg->rep, "%-10u %s", 938 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 939 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 940 out: 941 tipc_tlv_sprintf(msg->rep, "\n"); 942 943 return 0; 944 } 945 946 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 947 struct nlattr **attrs) 948 { 949 u32 type, lower, upper; 950 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 951 int err; 952 953 if (!attrs[TIPC_NLA_PUBL]) 954 return -EINVAL; 955 956 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 957 attrs[TIPC_NLA_PUBL], NULL, NULL); 958 if (err) 959 return err; 960 961 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 962 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 963 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 964 965 if (lower == upper) 966 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 967 else 968 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 969 970 return 0; 971 } 972 973 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 974 { 975 int err; 976 void *hdr; 977 struct nlattr *nest; 978 struct sk_buff *args; 979 struct tipc_nl_compat_cmd_dump dump; 980 981 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 982 if (!args) 983 return -ENOMEM; 984 985 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 986 TIPC_NL_PUBL_GET); 987 if (!hdr) { 988 kfree_skb(args); 989 return -EMSGSIZE; 990 } 991 992 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK); 993 if (!nest) { 994 kfree_skb(args); 995 return -EMSGSIZE; 996 } 997 998 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 999 kfree_skb(args); 1000 return -EMSGSIZE; 1001 } 1002 1003 nla_nest_end(args, nest); 1004 genlmsg_end(args, hdr); 1005 1006 dump.dumpit = tipc_nl_publ_dump; 1007 dump.format = __tipc_nl_compat_publ_dump; 1008 1009 err = __tipc_nl_compat_dumpit(&dump, msg, args); 1010 1011 kfree_skb(args); 1012 1013 return err; 1014 } 1015 1016 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 1017 struct nlattr **attrs) 1018 { 1019 int err; 1020 u32 sock_ref; 1021 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 1022 1023 if (!attrs[TIPC_NLA_SOCK]) 1024 return -EINVAL; 1025 1026 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, 1027 attrs[TIPC_NLA_SOCK], NULL, NULL); 1028 if (err) 1029 return err; 1030 1031 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 1032 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 1033 1034 if (sock[TIPC_NLA_SOCK_CON]) { 1035 u32 node; 1036 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 1037 1038 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX, 1039 sock[TIPC_NLA_SOCK_CON], 1040 NULL, NULL); 1041 1042 if (err) 1043 return err; 1044 1045 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 1046 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 1047 tipc_zone(node), 1048 tipc_cluster(node), 1049 tipc_node(node), 1050 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 1051 1052 if (con[TIPC_NLA_CON_FLAG]) 1053 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 1054 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 1055 nla_get_u32(con[TIPC_NLA_CON_INST])); 1056 else 1057 tipc_tlv_sprintf(msg->rep, "\n"); 1058 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 1059 tipc_tlv_sprintf(msg->rep, " bound to"); 1060 1061 err = tipc_nl_compat_publ_dump(msg, sock_ref); 1062 if (err) 1063 return err; 1064 } 1065 tipc_tlv_sprintf(msg->rep, "\n"); 1066 1067 return 0; 1068 } 1069 1070 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 1071 struct nlattr **attrs) 1072 { 1073 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 1074 int err; 1075 1076 if (!attrs[TIPC_NLA_MEDIA]) 1077 return -EINVAL; 1078 1079 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX, 1080 attrs[TIPC_NLA_MEDIA], NULL, NULL); 1081 if (err) 1082 return err; 1083 1084 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 1085 nla_data(media[TIPC_NLA_MEDIA_NAME]), 1086 nla_len(media[TIPC_NLA_MEDIA_NAME])); 1087 } 1088 1089 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 1090 struct nlattr **attrs) 1091 { 1092 struct tipc_node_info node_info; 1093 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 1094 int err; 1095 1096 if (!attrs[TIPC_NLA_NODE]) 1097 return -EINVAL; 1098 1099 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX, 1100 attrs[TIPC_NLA_NODE], NULL, NULL); 1101 if (err) 1102 return err; 1103 1104 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1105 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1106 1107 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1108 sizeof(node_info)); 1109 } 1110 1111 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1112 struct sk_buff *skb, 1113 struct tipc_nl_compat_msg *msg) 1114 { 1115 u32 val; 1116 struct nlattr *net; 1117 1118 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1119 1120 net = nla_nest_start_noflag(skb, TIPC_NLA_NET); 1121 if (!net) 1122 return -EMSGSIZE; 1123 1124 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1125 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1126 return -EMSGSIZE; 1127 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1128 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1129 return -EMSGSIZE; 1130 } 1131 nla_nest_end(skb, net); 1132 1133 return 0; 1134 } 1135 1136 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1137 struct nlattr **attrs) 1138 { 1139 __be32 id; 1140 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1141 int err; 1142 1143 if (!attrs[TIPC_NLA_NET]) 1144 return -EINVAL; 1145 1146 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX, 1147 attrs[TIPC_NLA_NET], NULL, NULL); 1148 if (err) 1149 return err; 1150 1151 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1152 1153 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1154 } 1155 1156 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1157 { 1158 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1159 if (!msg->rep) 1160 return -ENOMEM; 1161 1162 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1163 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1164 1165 return 0; 1166 } 1167 1168 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1169 { 1170 struct tipc_nl_compat_cmd_dump dump; 1171 struct tipc_nl_compat_cmd_doit doit; 1172 1173 memset(&dump, 0, sizeof(dump)); 1174 memset(&doit, 0, sizeof(doit)); 1175 1176 switch (msg->cmd) { 1177 case TIPC_CMD_NOOP: 1178 msg->rep = tipc_tlv_alloc(0); 1179 if (!msg->rep) 1180 return -ENOMEM; 1181 return 0; 1182 case TIPC_CMD_GET_BEARER_NAMES: 1183 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1184 dump.dumpit = tipc_nl_bearer_dump; 1185 dump.format = tipc_nl_compat_bearer_dump; 1186 return tipc_nl_compat_dumpit(&dump, msg); 1187 case TIPC_CMD_ENABLE_BEARER: 1188 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1189 doit.doit = __tipc_nl_bearer_enable; 1190 doit.transcode = tipc_nl_compat_bearer_enable; 1191 return tipc_nl_compat_doit(&doit, msg); 1192 case TIPC_CMD_DISABLE_BEARER: 1193 msg->req_type = TIPC_TLV_BEARER_NAME; 1194 doit.doit = __tipc_nl_bearer_disable; 1195 doit.transcode = tipc_nl_compat_bearer_disable; 1196 return tipc_nl_compat_doit(&doit, msg); 1197 case TIPC_CMD_SHOW_LINK_STATS: 1198 msg->req_type = TIPC_TLV_LINK_NAME; 1199 msg->rep_size = ULTRA_STRING_MAX_LEN; 1200 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1201 dump.dumpit = tipc_nl_node_dump_link; 1202 dump.format = tipc_nl_compat_link_stat_dump; 1203 return tipc_nl_compat_dumpit(&dump, msg); 1204 case TIPC_CMD_GET_LINKS: 1205 msg->req_type = TIPC_TLV_NET_ADDR; 1206 msg->rep_size = ULTRA_STRING_MAX_LEN; 1207 dump.dumpit = tipc_nl_node_dump_link; 1208 dump.format = tipc_nl_compat_link_dump; 1209 return tipc_nl_compat_dumpit(&dump, msg); 1210 case TIPC_CMD_SET_LINK_TOL: 1211 case TIPC_CMD_SET_LINK_PRI: 1212 case TIPC_CMD_SET_LINK_WINDOW: 1213 msg->req_type = TIPC_TLV_LINK_CONFIG; 1214 doit.doit = tipc_nl_node_set_link; 1215 doit.transcode = tipc_nl_compat_link_set; 1216 return tipc_nl_compat_doit(&doit, msg); 1217 case TIPC_CMD_RESET_LINK_STATS: 1218 msg->req_type = TIPC_TLV_LINK_NAME; 1219 doit.doit = tipc_nl_node_reset_link_stats; 1220 doit.transcode = tipc_nl_compat_link_reset_stats; 1221 return tipc_nl_compat_doit(&doit, msg); 1222 case TIPC_CMD_SHOW_NAME_TABLE: 1223 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1224 msg->rep_size = ULTRA_STRING_MAX_LEN; 1225 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1226 dump.header = tipc_nl_compat_name_table_dump_header; 1227 dump.dumpit = tipc_nl_name_table_dump; 1228 dump.format = tipc_nl_compat_name_table_dump; 1229 return tipc_nl_compat_dumpit(&dump, msg); 1230 case TIPC_CMD_SHOW_PORTS: 1231 msg->rep_size = ULTRA_STRING_MAX_LEN; 1232 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1233 dump.dumpit = tipc_nl_sk_dump; 1234 dump.format = tipc_nl_compat_sk_dump; 1235 return tipc_nl_compat_dumpit(&dump, msg); 1236 case TIPC_CMD_GET_MEDIA_NAMES: 1237 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1238 dump.dumpit = tipc_nl_media_dump; 1239 dump.format = tipc_nl_compat_media_dump; 1240 return tipc_nl_compat_dumpit(&dump, msg); 1241 case TIPC_CMD_GET_NODES: 1242 msg->rep_size = ULTRA_STRING_MAX_LEN; 1243 dump.dumpit = tipc_nl_node_dump; 1244 dump.format = tipc_nl_compat_node_dump; 1245 return tipc_nl_compat_dumpit(&dump, msg); 1246 case TIPC_CMD_SET_NODE_ADDR: 1247 msg->req_type = TIPC_TLV_NET_ADDR; 1248 doit.doit = __tipc_nl_net_set; 1249 doit.transcode = tipc_nl_compat_net_set; 1250 return tipc_nl_compat_doit(&doit, msg); 1251 case TIPC_CMD_SET_NETID: 1252 msg->req_type = TIPC_TLV_UNSIGNED; 1253 doit.doit = __tipc_nl_net_set; 1254 doit.transcode = tipc_nl_compat_net_set; 1255 return tipc_nl_compat_doit(&doit, msg); 1256 case TIPC_CMD_GET_NETID: 1257 msg->rep_size = sizeof(u32); 1258 dump.dumpit = tipc_nl_net_dump; 1259 dump.format = tipc_nl_compat_net_dump; 1260 return tipc_nl_compat_dumpit(&dump, msg); 1261 case TIPC_CMD_SHOW_STATS: 1262 return tipc_cmd_show_stats_compat(msg); 1263 } 1264 1265 return -EOPNOTSUPP; 1266 } 1267 1268 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1269 { 1270 int err; 1271 int len; 1272 struct tipc_nl_compat_msg msg; 1273 struct nlmsghdr *req_nlh; 1274 struct nlmsghdr *rep_nlh; 1275 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1276 1277 memset(&msg, 0, sizeof(msg)); 1278 1279 req_nlh = (struct nlmsghdr *)skb->data; 1280 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1281 msg.cmd = req_userhdr->cmd; 1282 msg.net = genl_info_net(info); 1283 msg.dst_sk = skb->sk; 1284 1285 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1286 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1287 err = -EACCES; 1288 goto send; 1289 } 1290 1291 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1292 if (!len || !TLV_OK(msg.req, len)) { 1293 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1294 err = -EOPNOTSUPP; 1295 goto send; 1296 } 1297 1298 err = tipc_nl_compat_handle(&msg); 1299 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1300 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1301 else if (err == -EINVAL) 1302 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1303 send: 1304 if (!msg.rep) 1305 return err; 1306 1307 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1308 skb_push(msg.rep, len); 1309 rep_nlh = nlmsg_hdr(msg.rep); 1310 memcpy(rep_nlh, info->nlhdr, len); 1311 rep_nlh->nlmsg_len = msg.rep->len; 1312 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1313 1314 return err; 1315 } 1316 1317 static const struct genl_ops tipc_genl_compat_ops[] = { 1318 { 1319 .cmd = TIPC_GENL_CMD, 1320 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1321 .doit = tipc_nl_compat_recv, 1322 }, 1323 }; 1324 1325 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1326 .name = TIPC_GENL_NAME, 1327 .version = TIPC_GENL_VERSION, 1328 .hdrsize = TIPC_GENL_HDRLEN, 1329 .maxattr = 0, 1330 .netnsok = true, 1331 .module = THIS_MODULE, 1332 .ops = tipc_genl_compat_ops, 1333 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1334 }; 1335 1336 int __init tipc_netlink_compat_start(void) 1337 { 1338 int res; 1339 1340 res = genl_register_family(&tipc_genl_compat_family); 1341 if (res) { 1342 pr_err("Failed to register legacy compat interface\n"); 1343 return res; 1344 } 1345 1346 return 0; 1347 } 1348 1349 void tipc_netlink_compat_stop(void) 1350 { 1351 genl_unregister_family(&tipc_genl_compat_family); 1352 } 1353