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; 694 695 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 696 697 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA); 698 if (!media) 699 return -EMSGSIZE; 700 701 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 702 return -EMSGSIZE; 703 704 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP); 705 if (!prop) 706 return -EMSGSIZE; 707 708 __tipc_add_link_prop(skb, msg, lc); 709 nla_nest_end(skb, prop); 710 nla_nest_end(skb, media); 711 712 return 0; 713 } 714 715 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 716 struct tipc_nl_compat_msg *msg) 717 { 718 struct nlattr *prop; 719 struct nlattr *bearer; 720 struct tipc_link_config *lc; 721 722 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 723 724 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 725 if (!bearer) 726 return -EMSGSIZE; 727 728 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 729 return -EMSGSIZE; 730 731 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 732 if (!prop) 733 return -EMSGSIZE; 734 735 __tipc_add_link_prop(skb, msg, lc); 736 nla_nest_end(skb, prop); 737 nla_nest_end(skb, bearer); 738 739 return 0; 740 } 741 742 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 743 struct tipc_nl_compat_msg *msg) 744 { 745 struct nlattr *prop; 746 struct nlattr *link; 747 struct tipc_link_config *lc; 748 749 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 750 751 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 752 if (!link) 753 return -EMSGSIZE; 754 755 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 756 return -EMSGSIZE; 757 758 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP); 759 if (!prop) 760 return -EMSGSIZE; 761 762 __tipc_add_link_prop(skb, msg, lc); 763 nla_nest_end(skb, prop); 764 nla_nest_end(skb, link); 765 766 return 0; 767 } 768 769 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 770 struct sk_buff *skb, 771 struct tipc_nl_compat_msg *msg) 772 { 773 struct tipc_link_config *lc; 774 struct tipc_bearer *bearer; 775 struct tipc_media *media; 776 int len; 777 778 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 779 780 len = TLV_GET_DATA_LEN(msg->req); 781 len -= offsetof(struct tipc_link_config, name); 782 if (len <= 0) 783 return -EINVAL; 784 785 len = min_t(int, len, TIPC_MAX_LINK_NAME); 786 if (!string_is_valid(lc->name, len)) 787 return -EINVAL; 788 789 media = tipc_media_find(lc->name); 790 if (media) { 791 cmd->doit = &__tipc_nl_media_set; 792 return tipc_nl_compat_media_set(skb, msg); 793 } 794 795 bearer = tipc_bearer_find(msg->net, lc->name); 796 if (bearer) { 797 cmd->doit = &__tipc_nl_bearer_set; 798 return tipc_nl_compat_bearer_set(skb, msg); 799 } 800 801 return __tipc_nl_compat_link_set(skb, msg); 802 } 803 804 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 805 struct sk_buff *skb, 806 struct tipc_nl_compat_msg *msg) 807 { 808 char *name; 809 struct nlattr *link; 810 int len; 811 812 name = (char *)TLV_DATA(msg->req); 813 814 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 815 if (!link) 816 return -EMSGSIZE; 817 818 len = TLV_GET_DATA_LEN(msg->req); 819 if (len <= 0) 820 return -EINVAL; 821 822 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 823 if (!string_is_valid(name, len)) 824 return -EINVAL; 825 826 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 827 return -EMSGSIZE; 828 829 nla_nest_end(skb, link); 830 831 return 0; 832 } 833 834 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 835 { 836 int i; 837 u32 depth; 838 struct tipc_name_table_query *ntq; 839 static const char * const header[] = { 840 "Type ", 841 "Lower Upper ", 842 "Port Identity ", 843 "Publication Scope" 844 }; 845 846 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 847 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query)) 848 return -EINVAL; 849 850 depth = ntohl(ntq->depth); 851 852 if (depth > 4) 853 depth = 4; 854 for (i = 0; i < depth; i++) 855 tipc_tlv_sprintf(msg->rep, header[i]); 856 tipc_tlv_sprintf(msg->rep, "\n"); 857 858 return 0; 859 } 860 861 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 862 struct nlattr **attrs) 863 { 864 char port_str[27]; 865 struct tipc_name_table_query *ntq; 866 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 867 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 868 u32 node, depth, type, lowbound, upbound; 869 static const char * const scope_str[] = {"", " zone", " cluster", 870 " node"}; 871 int err; 872 873 if (!attrs[TIPC_NLA_NAME_TABLE]) 874 return -EINVAL; 875 876 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX, 877 attrs[TIPC_NLA_NAME_TABLE], NULL, 878 NULL); 879 if (err) 880 return err; 881 882 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 883 return -EINVAL; 884 885 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 886 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, 887 NULL); 888 if (err) 889 return err; 890 891 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 892 893 depth = ntohl(ntq->depth); 894 type = ntohl(ntq->type); 895 lowbound = ntohl(ntq->lowbound); 896 upbound = ntohl(ntq->upbound); 897 898 if (!(depth & TIPC_NTQ_ALLTYPES) && 899 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 900 return 0; 901 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 902 return 0; 903 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 904 return 0; 905 906 tipc_tlv_sprintf(msg->rep, "%-10u ", 907 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 908 909 if (depth == 1) 910 goto out; 911 912 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 913 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 914 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 915 916 if (depth == 2) 917 goto out; 918 919 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 920 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 921 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 922 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 923 924 if (depth == 3) 925 goto out; 926 927 tipc_tlv_sprintf(msg->rep, "%-10u %s", 928 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 929 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 930 out: 931 tipc_tlv_sprintf(msg->rep, "\n"); 932 933 return 0; 934 } 935 936 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 937 struct nlattr **attrs) 938 { 939 u32 type, lower, upper; 940 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 941 int err; 942 943 if (!attrs[TIPC_NLA_PUBL]) 944 return -EINVAL; 945 946 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 947 attrs[TIPC_NLA_PUBL], NULL, NULL); 948 if (err) 949 return err; 950 951 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 952 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 953 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 954 955 if (lower == upper) 956 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 957 else 958 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 959 960 return 0; 961 } 962 963 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 964 { 965 int err; 966 void *hdr; 967 struct nlattr *nest; 968 struct sk_buff *args; 969 struct tipc_nl_compat_cmd_dump dump; 970 971 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 972 if (!args) 973 return -ENOMEM; 974 975 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 976 TIPC_NL_PUBL_GET); 977 if (!hdr) { 978 kfree_skb(args); 979 return -EMSGSIZE; 980 } 981 982 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK); 983 if (!nest) { 984 kfree_skb(args); 985 return -EMSGSIZE; 986 } 987 988 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 989 kfree_skb(args); 990 return -EMSGSIZE; 991 } 992 993 nla_nest_end(args, nest); 994 genlmsg_end(args, hdr); 995 996 dump.dumpit = tipc_nl_publ_dump; 997 dump.format = __tipc_nl_compat_publ_dump; 998 999 err = __tipc_nl_compat_dumpit(&dump, msg, args); 1000 1001 kfree_skb(args); 1002 1003 return err; 1004 } 1005 1006 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 1007 struct nlattr **attrs) 1008 { 1009 int err; 1010 u32 sock_ref; 1011 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 1012 1013 if (!attrs[TIPC_NLA_SOCK]) 1014 return -EINVAL; 1015 1016 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, 1017 attrs[TIPC_NLA_SOCK], NULL, NULL); 1018 if (err) 1019 return err; 1020 1021 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 1022 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 1023 1024 if (sock[TIPC_NLA_SOCK_CON]) { 1025 u32 node; 1026 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 1027 1028 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX, 1029 sock[TIPC_NLA_SOCK_CON], 1030 NULL, NULL); 1031 1032 if (err) 1033 return err; 1034 1035 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 1036 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 1037 tipc_zone(node), 1038 tipc_cluster(node), 1039 tipc_node(node), 1040 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 1041 1042 if (con[TIPC_NLA_CON_FLAG]) 1043 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 1044 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 1045 nla_get_u32(con[TIPC_NLA_CON_INST])); 1046 else 1047 tipc_tlv_sprintf(msg->rep, "\n"); 1048 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 1049 tipc_tlv_sprintf(msg->rep, " bound to"); 1050 1051 err = tipc_nl_compat_publ_dump(msg, sock_ref); 1052 if (err) 1053 return err; 1054 } 1055 tipc_tlv_sprintf(msg->rep, "\n"); 1056 1057 return 0; 1058 } 1059 1060 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 1061 struct nlattr **attrs) 1062 { 1063 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 1064 int err; 1065 1066 if (!attrs[TIPC_NLA_MEDIA]) 1067 return -EINVAL; 1068 1069 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX, 1070 attrs[TIPC_NLA_MEDIA], NULL, NULL); 1071 if (err) 1072 return err; 1073 1074 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 1075 nla_data(media[TIPC_NLA_MEDIA_NAME]), 1076 nla_len(media[TIPC_NLA_MEDIA_NAME])); 1077 } 1078 1079 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 1080 struct nlattr **attrs) 1081 { 1082 struct tipc_node_info node_info; 1083 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 1084 int err; 1085 1086 if (!attrs[TIPC_NLA_NODE]) 1087 return -EINVAL; 1088 1089 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX, 1090 attrs[TIPC_NLA_NODE], NULL, NULL); 1091 if (err) 1092 return err; 1093 1094 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1095 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1096 1097 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1098 sizeof(node_info)); 1099 } 1100 1101 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1102 struct sk_buff *skb, 1103 struct tipc_nl_compat_msg *msg) 1104 { 1105 u32 val; 1106 struct nlattr *net; 1107 1108 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1109 1110 net = nla_nest_start_noflag(skb, TIPC_NLA_NET); 1111 if (!net) 1112 return -EMSGSIZE; 1113 1114 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1115 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1116 return -EMSGSIZE; 1117 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1118 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1119 return -EMSGSIZE; 1120 } 1121 nla_nest_end(skb, net); 1122 1123 return 0; 1124 } 1125 1126 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1127 struct nlattr **attrs) 1128 { 1129 __be32 id; 1130 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1131 int err; 1132 1133 if (!attrs[TIPC_NLA_NET]) 1134 return -EINVAL; 1135 1136 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX, 1137 attrs[TIPC_NLA_NET], NULL, NULL); 1138 if (err) 1139 return err; 1140 1141 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1142 1143 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1144 } 1145 1146 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1147 { 1148 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1149 if (!msg->rep) 1150 return -ENOMEM; 1151 1152 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1153 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1154 1155 return 0; 1156 } 1157 1158 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1159 { 1160 struct tipc_nl_compat_cmd_dump dump; 1161 struct tipc_nl_compat_cmd_doit doit; 1162 1163 memset(&dump, 0, sizeof(dump)); 1164 memset(&doit, 0, sizeof(doit)); 1165 1166 switch (msg->cmd) { 1167 case TIPC_CMD_NOOP: 1168 msg->rep = tipc_tlv_alloc(0); 1169 if (!msg->rep) 1170 return -ENOMEM; 1171 return 0; 1172 case TIPC_CMD_GET_BEARER_NAMES: 1173 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1174 dump.dumpit = tipc_nl_bearer_dump; 1175 dump.format = tipc_nl_compat_bearer_dump; 1176 return tipc_nl_compat_dumpit(&dump, msg); 1177 case TIPC_CMD_ENABLE_BEARER: 1178 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1179 doit.doit = __tipc_nl_bearer_enable; 1180 doit.transcode = tipc_nl_compat_bearer_enable; 1181 return tipc_nl_compat_doit(&doit, msg); 1182 case TIPC_CMD_DISABLE_BEARER: 1183 msg->req_type = TIPC_TLV_BEARER_NAME; 1184 doit.doit = __tipc_nl_bearer_disable; 1185 doit.transcode = tipc_nl_compat_bearer_disable; 1186 return tipc_nl_compat_doit(&doit, msg); 1187 case TIPC_CMD_SHOW_LINK_STATS: 1188 msg->req_type = TIPC_TLV_LINK_NAME; 1189 msg->rep_size = ULTRA_STRING_MAX_LEN; 1190 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1191 dump.dumpit = tipc_nl_node_dump_link; 1192 dump.format = tipc_nl_compat_link_stat_dump; 1193 return tipc_nl_compat_dumpit(&dump, msg); 1194 case TIPC_CMD_GET_LINKS: 1195 msg->req_type = TIPC_TLV_NET_ADDR; 1196 msg->rep_size = ULTRA_STRING_MAX_LEN; 1197 dump.dumpit = tipc_nl_node_dump_link; 1198 dump.format = tipc_nl_compat_link_dump; 1199 return tipc_nl_compat_dumpit(&dump, msg); 1200 case TIPC_CMD_SET_LINK_TOL: 1201 case TIPC_CMD_SET_LINK_PRI: 1202 case TIPC_CMD_SET_LINK_WINDOW: 1203 msg->req_type = TIPC_TLV_LINK_CONFIG; 1204 doit.doit = tipc_nl_node_set_link; 1205 doit.transcode = tipc_nl_compat_link_set; 1206 return tipc_nl_compat_doit(&doit, msg); 1207 case TIPC_CMD_RESET_LINK_STATS: 1208 msg->req_type = TIPC_TLV_LINK_NAME; 1209 doit.doit = tipc_nl_node_reset_link_stats; 1210 doit.transcode = tipc_nl_compat_link_reset_stats; 1211 return tipc_nl_compat_doit(&doit, msg); 1212 case TIPC_CMD_SHOW_NAME_TABLE: 1213 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1214 msg->rep_size = ULTRA_STRING_MAX_LEN; 1215 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1216 dump.header = tipc_nl_compat_name_table_dump_header; 1217 dump.dumpit = tipc_nl_name_table_dump; 1218 dump.format = tipc_nl_compat_name_table_dump; 1219 return tipc_nl_compat_dumpit(&dump, msg); 1220 case TIPC_CMD_SHOW_PORTS: 1221 msg->rep_size = ULTRA_STRING_MAX_LEN; 1222 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1223 dump.dumpit = tipc_nl_sk_dump; 1224 dump.format = tipc_nl_compat_sk_dump; 1225 return tipc_nl_compat_dumpit(&dump, msg); 1226 case TIPC_CMD_GET_MEDIA_NAMES: 1227 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1228 dump.dumpit = tipc_nl_media_dump; 1229 dump.format = tipc_nl_compat_media_dump; 1230 return tipc_nl_compat_dumpit(&dump, msg); 1231 case TIPC_CMD_GET_NODES: 1232 msg->rep_size = ULTRA_STRING_MAX_LEN; 1233 dump.dumpit = tipc_nl_node_dump; 1234 dump.format = tipc_nl_compat_node_dump; 1235 return tipc_nl_compat_dumpit(&dump, msg); 1236 case TIPC_CMD_SET_NODE_ADDR: 1237 msg->req_type = TIPC_TLV_NET_ADDR; 1238 doit.doit = __tipc_nl_net_set; 1239 doit.transcode = tipc_nl_compat_net_set; 1240 return tipc_nl_compat_doit(&doit, msg); 1241 case TIPC_CMD_SET_NETID: 1242 msg->req_type = TIPC_TLV_UNSIGNED; 1243 doit.doit = __tipc_nl_net_set; 1244 doit.transcode = tipc_nl_compat_net_set; 1245 return tipc_nl_compat_doit(&doit, msg); 1246 case TIPC_CMD_GET_NETID: 1247 msg->rep_size = sizeof(u32); 1248 dump.dumpit = tipc_nl_net_dump; 1249 dump.format = tipc_nl_compat_net_dump; 1250 return tipc_nl_compat_dumpit(&dump, msg); 1251 case TIPC_CMD_SHOW_STATS: 1252 return tipc_cmd_show_stats_compat(msg); 1253 } 1254 1255 return -EOPNOTSUPP; 1256 } 1257 1258 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1259 { 1260 int err; 1261 int len; 1262 struct tipc_nl_compat_msg msg; 1263 struct nlmsghdr *req_nlh; 1264 struct nlmsghdr *rep_nlh; 1265 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1266 1267 memset(&msg, 0, sizeof(msg)); 1268 1269 req_nlh = (struct nlmsghdr *)skb->data; 1270 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1271 msg.cmd = req_userhdr->cmd; 1272 msg.net = genl_info_net(info); 1273 msg.dst_sk = skb->sk; 1274 1275 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1276 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1277 err = -EACCES; 1278 goto send; 1279 } 1280 1281 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1282 if (!len || !TLV_OK(msg.req, len)) { 1283 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1284 err = -EOPNOTSUPP; 1285 goto send; 1286 } 1287 1288 err = tipc_nl_compat_handle(&msg); 1289 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1290 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1291 else if (err == -EINVAL) 1292 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1293 send: 1294 if (!msg.rep) 1295 return err; 1296 1297 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1298 skb_push(msg.rep, len); 1299 rep_nlh = nlmsg_hdr(msg.rep); 1300 memcpy(rep_nlh, info->nlhdr, len); 1301 rep_nlh->nlmsg_len = msg.rep->len; 1302 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1303 1304 return err; 1305 } 1306 1307 static const struct genl_ops tipc_genl_compat_ops[] = { 1308 { 1309 .cmd = TIPC_GENL_CMD, 1310 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1311 .doit = tipc_nl_compat_recv, 1312 }, 1313 }; 1314 1315 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1316 .name = TIPC_GENL_NAME, 1317 .version = TIPC_GENL_VERSION, 1318 .hdrsize = TIPC_GENL_HDRLEN, 1319 .maxattr = 0, 1320 .netnsok = true, 1321 .module = THIS_MODULE, 1322 .ops = tipc_genl_compat_ops, 1323 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1324 }; 1325 1326 int __init tipc_netlink_compat_start(void) 1327 { 1328 int res; 1329 1330 res = genl_register_family(&tipc_genl_compat_family); 1331 if (res) { 1332 pr_err("Failed to register legacy compat interface\n"); 1333 return res; 1334 } 1335 1336 return 0; 1337 } 1338 1339 void tipc_netlink_compat_stop(void) 1340 { 1341 genl_unregister_family(&tipc_genl_compat_family); 1342 } 1343