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/string_helpers.h> 43 #include <linux/tipc_config.h> 44 45 /* The legacy API had an artificial message length limit called 46 * ULTRA_STRING_MAX_LEN. 47 */ 48 #define ULTRA_STRING_MAX_LEN 32768 49 50 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN) 51 52 #define REPLY_TRUNCATED "<truncated>\n" 53 54 struct tipc_nl_compat_msg { 55 u16 cmd; 56 int rep_type; 57 int rep_size; 58 int req_type; 59 int req_size; 60 struct net *net; 61 struct sk_buff *rep; 62 struct tlv_desc *req; 63 struct sock *dst_sk; 64 }; 65 66 struct tipc_nl_compat_cmd_dump { 67 int (*header)(struct tipc_nl_compat_msg *); 68 int (*dumpit)(struct sk_buff *, struct netlink_callback *); 69 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs); 70 }; 71 72 struct tipc_nl_compat_cmd_doit { 73 int (*doit)(struct sk_buff *skb, struct genl_info *info); 74 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd, 75 struct sk_buff *skb, struct tipc_nl_compat_msg *msg); 76 }; 77 78 static int tipc_skb_tailroom(struct sk_buff *skb) 79 { 80 int tailroom; 81 int limit; 82 83 tailroom = skb_tailroom(skb); 84 limit = TIPC_SKB_MAX - skb->len; 85 86 if (tailroom < limit) 87 return tailroom; 88 89 return limit; 90 } 91 92 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv) 93 { 94 return TLV_GET_LEN(tlv) - TLV_SPACE(0); 95 } 96 97 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) 98 { 99 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb); 100 101 if (tipc_skb_tailroom(skb) < TLV_SPACE(len)) 102 return -EMSGSIZE; 103 104 skb_put(skb, TLV_SPACE(len)); 105 tlv->tlv_type = htons(type); 106 tlv->tlv_len = htons(TLV_LENGTH(len)); 107 if (len && data) 108 memcpy(TLV_DATA(tlv), data, len); 109 110 return 0; 111 } 112 113 static void tipc_tlv_init(struct sk_buff *skb, u16 type) 114 { 115 struct tlv_desc *tlv = (struct tlv_desc *)skb->data; 116 117 TLV_SET_LEN(tlv, 0); 118 TLV_SET_TYPE(tlv, type); 119 skb_put(skb, sizeof(struct tlv_desc)); 120 } 121 122 static __printf(2, 3) int tipc_tlv_sprintf(struct sk_buff *skb, 123 const char *fmt, ...) 124 { 125 int n; 126 u16 len; 127 u32 rem; 128 char *buf; 129 struct tlv_desc *tlv; 130 va_list args; 131 132 rem = tipc_skb_tailroom(skb); 133 134 tlv = (struct tlv_desc *)skb->data; 135 len = TLV_GET_LEN(tlv); 136 buf = TLV_DATA(tlv) + len; 137 138 va_start(args, fmt); 139 n = vscnprintf(buf, rem, fmt, args); 140 va_end(args); 141 142 TLV_SET_LEN(tlv, n + len); 143 skb_put(skb, n); 144 145 return n; 146 } 147 148 static struct sk_buff *tipc_tlv_alloc(int size) 149 { 150 int hdr_len; 151 struct sk_buff *buf; 152 153 size = TLV_SPACE(size); 154 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 155 156 buf = alloc_skb(hdr_len + size, GFP_KERNEL); 157 if (!buf) 158 return NULL; 159 160 skb_reserve(buf, hdr_len); 161 162 return buf; 163 } 164 165 static struct sk_buff *tipc_get_err_tlv(char *str) 166 { 167 int str_len = strlen(str) + 1; 168 struct sk_buff *buf; 169 170 buf = tipc_tlv_alloc(TLV_SPACE(str_len)); 171 if (buf) 172 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len); 173 174 return buf; 175 } 176 177 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 178 struct tipc_nl_compat_msg *msg, 179 struct sk_buff *arg) 180 { 181 struct genl_dumpit_info info; 182 int len = 0; 183 int err; 184 struct sk_buff *buf; 185 struct nlmsghdr *nlmsg; 186 struct netlink_callback cb; 187 struct nlattr **attrbuf; 188 189 memset(&cb, 0, sizeof(cb)); 190 cb.nlh = (struct nlmsghdr *)arg->data; 191 cb.skb = arg; 192 cb.data = &info; 193 194 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 195 if (!buf) 196 return -ENOMEM; 197 198 buf->sk = msg->dst_sk; 199 if (__tipc_dump_start(&cb, msg->net)) { 200 kfree_skb(buf); 201 return -ENOMEM; 202 } 203 204 attrbuf = kcalloc(tipc_genl_family.maxattr + 1, 205 sizeof(struct nlattr *), GFP_KERNEL); 206 if (!attrbuf) { 207 err = -ENOMEM; 208 goto err_out; 209 } 210 211 info.attrs = attrbuf; 212 213 if (nlmsg_len(cb.nlh) > 0) { 214 err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf, 215 tipc_genl_family.maxattr, 216 tipc_genl_family.policy, NULL); 217 if (err) 218 goto err_out; 219 } 220 do { 221 int rem; 222 223 len = (*cmd->dumpit)(buf, &cb); 224 225 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { 226 err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN, 227 attrbuf, 228 tipc_genl_family.maxattr, 229 tipc_genl_family.policy, 230 NULL); 231 if (err) 232 goto err_out; 233 234 err = (*cmd->format)(msg, attrbuf); 235 if (err) 236 goto err_out; 237 238 if (tipc_skb_tailroom(msg->rep) <= 1) { 239 err = -EMSGSIZE; 240 goto err_out; 241 } 242 } 243 244 skb_reset_tail_pointer(buf); 245 buf->len = 0; 246 247 } while (len); 248 249 err = 0; 250 251 err_out: 252 kfree(attrbuf); 253 tipc_dump_done(&cb); 254 kfree_skb(buf); 255 256 if (err == -EMSGSIZE) { 257 /* The legacy API only considered messages filling 258 * "ULTRA_STRING_MAX_LEN" to be truncated. 259 */ 260 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { 261 char *tail = skb_tail_pointer(msg->rep); 262 263 if (*tail != '\0') 264 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, 265 REPLY_TRUNCATED); 266 } 267 268 return 0; 269 } 270 271 return err; 272 } 273 274 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 275 struct tipc_nl_compat_msg *msg) 276 { 277 struct nlmsghdr *nlh; 278 struct sk_buff *arg; 279 int err; 280 281 if (msg->req_type && (!msg->req_size || 282 !TLV_CHECK_TYPE(msg->req, msg->req_type))) 283 return -EINVAL; 284 285 msg->rep = tipc_tlv_alloc(msg->rep_size); 286 if (!msg->rep) 287 return -ENOMEM; 288 289 if (msg->rep_type) 290 tipc_tlv_init(msg->rep, msg->rep_type); 291 292 if (cmd->header) { 293 err = (*cmd->header)(msg); 294 if (err) { 295 kfree_skb(msg->rep); 296 msg->rep = NULL; 297 return err; 298 } 299 } 300 301 arg = nlmsg_new(0, GFP_KERNEL); 302 if (!arg) { 303 kfree_skb(msg->rep); 304 msg->rep = NULL; 305 return -ENOMEM; 306 } 307 308 nlh = nlmsg_put(arg, 0, 0, tipc_genl_family.id, 0, NLM_F_MULTI); 309 if (!nlh) { 310 kfree_skb(arg); 311 kfree_skb(msg->rep); 312 msg->rep = NULL; 313 return -EMSGSIZE; 314 } 315 nlmsg_end(arg, nlh); 316 317 err = __tipc_nl_compat_dumpit(cmd, msg, arg); 318 if (err) { 319 kfree_skb(msg->rep); 320 msg->rep = NULL; 321 } 322 kfree_skb(arg); 323 324 return err; 325 } 326 327 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 328 struct tipc_nl_compat_msg *msg) 329 { 330 int err; 331 struct sk_buff *doit_buf; 332 struct sk_buff *trans_buf; 333 struct nlattr **attrbuf; 334 struct genl_info info; 335 336 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 337 if (!trans_buf) 338 return -ENOMEM; 339 340 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1, 341 sizeof(struct nlattr *), 342 GFP_KERNEL); 343 if (!attrbuf) { 344 err = -ENOMEM; 345 goto trans_out; 346 } 347 348 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 349 if (!doit_buf) { 350 err = -ENOMEM; 351 goto attrbuf_out; 352 } 353 354 memset(&info, 0, sizeof(info)); 355 info.attrs = attrbuf; 356 357 rtnl_lock(); 358 err = (*cmd->transcode)(cmd, trans_buf, msg); 359 if (err) 360 goto doit_out; 361 362 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr, 363 (const struct nlattr *)trans_buf->data, 364 trans_buf->len, NULL, NULL); 365 if (err) 366 goto doit_out; 367 368 doit_buf->sk = msg->dst_sk; 369 370 err = (*cmd->doit)(doit_buf, &info); 371 doit_out: 372 rtnl_unlock(); 373 374 kfree_skb(doit_buf); 375 attrbuf_out: 376 kfree(attrbuf); 377 trans_out: 378 kfree_skb(trans_buf); 379 380 return err; 381 } 382 383 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 384 struct tipc_nl_compat_msg *msg) 385 { 386 int err; 387 388 if (msg->req_type && (!msg->req_size || 389 !TLV_CHECK_TYPE(msg->req, msg->req_type))) 390 return -EINVAL; 391 392 err = __tipc_nl_compat_doit(cmd, msg); 393 if (err) 394 return err; 395 396 /* The legacy API considered an empty message a success message */ 397 msg->rep = tipc_tlv_alloc(0); 398 if (!msg->rep) 399 return -ENOMEM; 400 401 return 0; 402 } 403 404 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, 405 struct nlattr **attrs) 406 { 407 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; 408 int err; 409 410 if (!attrs[TIPC_NLA_BEARER]) 411 return -EINVAL; 412 413 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX, 414 attrs[TIPC_NLA_BEARER], NULL, NULL); 415 if (err) 416 return err; 417 418 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, 419 nla_data(bearer[TIPC_NLA_BEARER_NAME]), 420 nla_len(bearer[TIPC_NLA_BEARER_NAME])); 421 } 422 423 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, 424 struct sk_buff *skb, 425 struct tipc_nl_compat_msg *msg) 426 { 427 struct nlattr *prop; 428 struct nlattr *bearer; 429 struct tipc_bearer_config *b; 430 int len; 431 432 b = (struct tipc_bearer_config *)TLV_DATA(msg->req); 433 434 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 435 if (!bearer) 436 return -EMSGSIZE; 437 438 len = TLV_GET_DATA_LEN(msg->req); 439 len -= offsetof(struct tipc_bearer_config, name); 440 if (len <= 0) 441 return -EINVAL; 442 443 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 444 if (!string_is_terminated(b->name, len)) 445 return -EINVAL; 446 447 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) 448 return -EMSGSIZE; 449 450 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) 451 return -EMSGSIZE; 452 453 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { 454 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 455 if (!prop) 456 return -EMSGSIZE; 457 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) 458 return -EMSGSIZE; 459 nla_nest_end(skb, prop); 460 } 461 nla_nest_end(skb, bearer); 462 463 return 0; 464 } 465 466 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, 467 struct sk_buff *skb, 468 struct tipc_nl_compat_msg *msg) 469 { 470 char *name; 471 struct nlattr *bearer; 472 int len; 473 474 name = (char *)TLV_DATA(msg->req); 475 476 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 477 if (!bearer) 478 return -EMSGSIZE; 479 480 len = TLV_GET_DATA_LEN(msg->req); 481 if (len <= 0) 482 return -EINVAL; 483 484 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 485 if (!string_is_terminated(name, len)) 486 return -EINVAL; 487 488 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 489 return -EMSGSIZE; 490 491 nla_nest_end(skb, bearer); 492 493 return 0; 494 } 495 496 static inline u32 perc(u32 count, u32 total) 497 { 498 return (count * 100 + (total / 2)) / total; 499 } 500 501 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 502 struct nlattr *prop[], struct nlattr *stats[]) 503 { 504 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 505 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 506 507 tipc_tlv_sprintf(msg->rep, 508 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 509 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 510 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 511 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 512 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 513 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 514 515 tipc_tlv_sprintf(msg->rep, 516 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 517 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 518 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 519 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 520 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 521 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 522 523 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 524 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 525 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 526 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 527 528 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 529 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 530 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 531 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 532 533 tipc_tlv_sprintf(msg->rep, 534 " Congestion link:%u Send queue max:%u avg:%u", 535 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 536 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 537 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 538 } 539 540 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 541 struct nlattr **attrs) 542 { 543 char *name; 544 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 545 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 546 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 547 int err; 548 int len; 549 550 if (!attrs[TIPC_NLA_LINK]) 551 return -EINVAL; 552 553 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 554 attrs[TIPC_NLA_LINK], NULL, NULL); 555 if (err) 556 return err; 557 558 if (!link[TIPC_NLA_LINK_PROP]) 559 return -EINVAL; 560 561 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX, 562 link[TIPC_NLA_LINK_PROP], NULL, 563 NULL); 564 if (err) 565 return err; 566 567 if (!link[TIPC_NLA_LINK_STATS]) 568 return -EINVAL; 569 570 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX, 571 link[TIPC_NLA_LINK_STATS], NULL, 572 NULL); 573 if (err) 574 return err; 575 576 name = (char *)TLV_DATA(msg->req); 577 578 len = TLV_GET_DATA_LEN(msg->req); 579 if (len <= 0) 580 return -EINVAL; 581 582 len = min_t(int, len, TIPC_MAX_LINK_NAME); 583 if (!string_is_terminated(name, len)) 584 return -EINVAL; 585 586 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 587 return 0; 588 589 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 590 (char *)nla_data(link[TIPC_NLA_LINK_NAME])); 591 592 if (link[TIPC_NLA_LINK_BROADCAST]) { 593 __fill_bc_link_stat(msg, prop, stats); 594 return 0; 595 } 596 597 if (link[TIPC_NLA_LINK_ACTIVE]) 598 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 599 else if (link[TIPC_NLA_LINK_UP]) 600 tipc_tlv_sprintf(msg->rep, " STANDBY"); 601 else 602 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 603 604 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 605 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 606 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 607 608 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 609 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 610 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 611 612 tipc_tlv_sprintf(msg->rep, 613 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 614 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 615 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 616 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 617 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 618 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 619 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 620 621 tipc_tlv_sprintf(msg->rep, 622 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 623 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 624 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 625 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 626 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 627 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 628 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 629 630 tipc_tlv_sprintf(msg->rep, 631 " TX profile sample:%u packets average:%u octets\n", 632 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 633 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 634 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 635 636 tipc_tlv_sprintf(msg->rep, 637 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 638 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 639 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 640 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 641 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 642 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 643 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 644 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 645 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 646 647 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 648 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 649 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 650 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 651 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 652 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 653 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 654 655 tipc_tlv_sprintf(msg->rep, 656 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 657 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 658 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 659 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 660 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 661 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 662 663 tipc_tlv_sprintf(msg->rep, 664 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 665 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 666 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 667 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 668 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 669 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 670 671 tipc_tlv_sprintf(msg->rep, 672 " Congestion link:%u Send queue max:%u avg:%u", 673 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 674 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 675 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 676 677 return 0; 678 } 679 680 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 681 struct nlattr **attrs) 682 { 683 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 684 struct tipc_link_info link_info; 685 int err; 686 687 if (!attrs[TIPC_NLA_LINK]) 688 return -EINVAL; 689 690 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 691 attrs[TIPC_NLA_LINK], NULL, NULL); 692 if (err) 693 return err; 694 695 link_info.dest = htonl(nla_get_flag(link[TIPC_NLA_LINK_DEST])); 696 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 697 nla_strscpy(link_info.str, link[TIPC_NLA_LINK_NAME], 698 TIPC_MAX_LINK_NAME); 699 700 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 701 &link_info, sizeof(link_info)); 702 } 703 704 static int __tipc_add_link_prop(struct sk_buff *skb, 705 struct tipc_nl_compat_msg *msg, 706 struct tipc_link_config *lc) 707 { 708 switch (msg->cmd) { 709 case TIPC_CMD_SET_LINK_PRI: 710 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 711 case TIPC_CMD_SET_LINK_TOL: 712 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 713 case TIPC_CMD_SET_LINK_WINDOW: 714 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 715 } 716 717 return -EINVAL; 718 } 719 720 static int tipc_nl_compat_media_set(struct sk_buff *skb, 721 struct tipc_nl_compat_msg *msg) 722 { 723 struct nlattr *prop; 724 struct nlattr *media; 725 struct tipc_link_config *lc; 726 727 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 728 729 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA); 730 if (!media) 731 return -EMSGSIZE; 732 733 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 734 return -EMSGSIZE; 735 736 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP); 737 if (!prop) 738 return -EMSGSIZE; 739 740 __tipc_add_link_prop(skb, msg, lc); 741 nla_nest_end(skb, prop); 742 nla_nest_end(skb, media); 743 744 return 0; 745 } 746 747 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 748 struct tipc_nl_compat_msg *msg) 749 { 750 struct nlattr *prop; 751 struct nlattr *bearer; 752 struct tipc_link_config *lc; 753 754 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 755 756 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 757 if (!bearer) 758 return -EMSGSIZE; 759 760 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 761 return -EMSGSIZE; 762 763 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 764 if (!prop) 765 return -EMSGSIZE; 766 767 __tipc_add_link_prop(skb, msg, lc); 768 nla_nest_end(skb, prop); 769 nla_nest_end(skb, bearer); 770 771 return 0; 772 } 773 774 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 775 struct tipc_nl_compat_msg *msg) 776 { 777 struct nlattr *prop; 778 struct nlattr *link; 779 struct tipc_link_config *lc; 780 781 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 782 783 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 784 if (!link) 785 return -EMSGSIZE; 786 787 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 788 return -EMSGSIZE; 789 790 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP); 791 if (!prop) 792 return -EMSGSIZE; 793 794 __tipc_add_link_prop(skb, msg, lc); 795 nla_nest_end(skb, prop); 796 nla_nest_end(skb, link); 797 798 return 0; 799 } 800 801 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 802 struct sk_buff *skb, 803 struct tipc_nl_compat_msg *msg) 804 { 805 struct tipc_link_config *lc; 806 struct tipc_bearer *bearer; 807 struct tipc_media *media; 808 int len; 809 810 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 811 812 len = TLV_GET_DATA_LEN(msg->req); 813 len -= offsetof(struct tipc_link_config, name); 814 if (len <= 0) 815 return -EINVAL; 816 817 len = min_t(int, len, TIPC_MAX_LINK_NAME); 818 if (!string_is_terminated(lc->name, len)) 819 return -EINVAL; 820 821 media = tipc_media_find(lc->name); 822 if (media) { 823 cmd->doit = &__tipc_nl_media_set; 824 return tipc_nl_compat_media_set(skb, msg); 825 } 826 827 bearer = tipc_bearer_find(msg->net, lc->name); 828 if (bearer) { 829 cmd->doit = &__tipc_nl_bearer_set; 830 return tipc_nl_compat_bearer_set(skb, msg); 831 } 832 833 return __tipc_nl_compat_link_set(skb, msg); 834 } 835 836 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 837 struct sk_buff *skb, 838 struct tipc_nl_compat_msg *msg) 839 { 840 char *name; 841 struct nlattr *link; 842 int len; 843 844 name = (char *)TLV_DATA(msg->req); 845 846 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 847 if (!link) 848 return -EMSGSIZE; 849 850 len = TLV_GET_DATA_LEN(msg->req); 851 if (len <= 0) 852 return -EINVAL; 853 854 len = min_t(int, len, TIPC_MAX_LINK_NAME); 855 if (!string_is_terminated(name, len)) 856 return -EINVAL; 857 858 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 859 return -EMSGSIZE; 860 861 nla_nest_end(skb, link); 862 863 return 0; 864 } 865 866 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 867 { 868 int i; 869 u32 depth; 870 struct tipc_name_table_query *ntq; 871 static const char * const header[] = { 872 "Type ", 873 "Lower Upper ", 874 "Port Identity ", 875 "Publication Scope" 876 }; 877 878 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 879 if (TLV_GET_DATA_LEN(msg->req) < (int)sizeof(struct tipc_name_table_query)) 880 return -EINVAL; 881 882 depth = ntohl(ntq->depth); 883 884 if (depth > 4) 885 depth = 4; 886 for (i = 0; i < depth; i++) 887 tipc_tlv_sprintf(msg->rep, header[i]); 888 tipc_tlv_sprintf(msg->rep, "\n"); 889 890 return 0; 891 } 892 893 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 894 struct nlattr **attrs) 895 { 896 char port_str[27]; 897 struct tipc_name_table_query *ntq; 898 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 899 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 900 u32 node, depth, type, lowbound, upbound; 901 static const char * const scope_str[] = {"", " zone", " cluster", 902 " node"}; 903 int err; 904 905 if (!attrs[TIPC_NLA_NAME_TABLE]) 906 return -EINVAL; 907 908 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX, 909 attrs[TIPC_NLA_NAME_TABLE], NULL, 910 NULL); 911 if (err) 912 return err; 913 914 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 915 return -EINVAL; 916 917 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 918 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, 919 NULL); 920 if (err) 921 return err; 922 923 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 924 925 depth = ntohl(ntq->depth); 926 type = ntohl(ntq->type); 927 lowbound = ntohl(ntq->lowbound); 928 upbound = ntohl(ntq->upbound); 929 930 if (!(depth & TIPC_NTQ_ALLTYPES) && 931 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 932 return 0; 933 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 934 return 0; 935 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 936 return 0; 937 938 tipc_tlv_sprintf(msg->rep, "%-10u ", 939 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 940 941 if (depth == 1) 942 goto out; 943 944 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 945 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 946 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 947 948 if (depth == 2) 949 goto out; 950 951 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 952 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 953 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 954 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 955 956 if (depth == 3) 957 goto out; 958 959 tipc_tlv_sprintf(msg->rep, "%-10u %s", 960 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 961 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 962 out: 963 tipc_tlv_sprintf(msg->rep, "\n"); 964 965 return 0; 966 } 967 968 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 969 struct nlattr **attrs) 970 { 971 u32 type, lower, upper; 972 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 973 int err; 974 975 if (!attrs[TIPC_NLA_PUBL]) 976 return -EINVAL; 977 978 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 979 attrs[TIPC_NLA_PUBL], NULL, NULL); 980 if (err) 981 return err; 982 983 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 984 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 985 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 986 987 if (lower == upper) 988 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 989 else 990 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 991 992 return 0; 993 } 994 995 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 996 { 997 int err; 998 void *hdr; 999 struct nlattr *nest; 1000 struct sk_buff *args; 1001 struct tipc_nl_compat_cmd_dump dump; 1002 1003 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1004 if (!args) 1005 return -ENOMEM; 1006 1007 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 1008 TIPC_NL_PUBL_GET); 1009 if (!hdr) { 1010 kfree_skb(args); 1011 return -EMSGSIZE; 1012 } 1013 1014 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK); 1015 if (!nest) { 1016 kfree_skb(args); 1017 return -EMSGSIZE; 1018 } 1019 1020 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 1021 kfree_skb(args); 1022 return -EMSGSIZE; 1023 } 1024 1025 nla_nest_end(args, nest); 1026 genlmsg_end(args, hdr); 1027 1028 dump.dumpit = tipc_nl_publ_dump; 1029 dump.format = __tipc_nl_compat_publ_dump; 1030 1031 err = __tipc_nl_compat_dumpit(&dump, msg, args); 1032 1033 kfree_skb(args); 1034 1035 return err; 1036 } 1037 1038 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 1039 struct nlattr **attrs) 1040 { 1041 int err; 1042 u32 sock_ref; 1043 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 1044 1045 if (!attrs[TIPC_NLA_SOCK]) 1046 return -EINVAL; 1047 1048 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, 1049 attrs[TIPC_NLA_SOCK], NULL, NULL); 1050 if (err) 1051 return err; 1052 1053 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 1054 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 1055 1056 if (sock[TIPC_NLA_SOCK_CON]) { 1057 u32 node; 1058 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 1059 1060 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX, 1061 sock[TIPC_NLA_SOCK_CON], 1062 NULL, NULL); 1063 1064 if (err) 1065 return err; 1066 1067 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 1068 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 1069 tipc_zone(node), 1070 tipc_cluster(node), 1071 tipc_node(node), 1072 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 1073 1074 if (con[TIPC_NLA_CON_FLAG]) 1075 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 1076 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 1077 nla_get_u32(con[TIPC_NLA_CON_INST])); 1078 else 1079 tipc_tlv_sprintf(msg->rep, "\n"); 1080 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 1081 tipc_tlv_sprintf(msg->rep, " bound to"); 1082 1083 err = tipc_nl_compat_publ_dump(msg, sock_ref); 1084 if (err) 1085 return err; 1086 } 1087 tipc_tlv_sprintf(msg->rep, "\n"); 1088 1089 return 0; 1090 } 1091 1092 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 1093 struct nlattr **attrs) 1094 { 1095 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 1096 int err; 1097 1098 if (!attrs[TIPC_NLA_MEDIA]) 1099 return -EINVAL; 1100 1101 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX, 1102 attrs[TIPC_NLA_MEDIA], NULL, NULL); 1103 if (err) 1104 return err; 1105 1106 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 1107 nla_data(media[TIPC_NLA_MEDIA_NAME]), 1108 nla_len(media[TIPC_NLA_MEDIA_NAME])); 1109 } 1110 1111 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 1112 struct nlattr **attrs) 1113 { 1114 struct tipc_node_info node_info; 1115 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 1116 int err; 1117 1118 if (!attrs[TIPC_NLA_NODE]) 1119 return -EINVAL; 1120 1121 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX, 1122 attrs[TIPC_NLA_NODE], NULL, NULL); 1123 if (err) 1124 return err; 1125 1126 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1127 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1128 1129 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1130 sizeof(node_info)); 1131 } 1132 1133 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1134 struct sk_buff *skb, 1135 struct tipc_nl_compat_msg *msg) 1136 { 1137 u32 val; 1138 struct nlattr *net; 1139 1140 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1141 1142 net = nla_nest_start_noflag(skb, TIPC_NLA_NET); 1143 if (!net) 1144 return -EMSGSIZE; 1145 1146 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1147 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1148 return -EMSGSIZE; 1149 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1150 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1151 return -EMSGSIZE; 1152 } 1153 nla_nest_end(skb, net); 1154 1155 return 0; 1156 } 1157 1158 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1159 struct nlattr **attrs) 1160 { 1161 __be32 id; 1162 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1163 int err; 1164 1165 if (!attrs[TIPC_NLA_NET]) 1166 return -EINVAL; 1167 1168 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX, 1169 attrs[TIPC_NLA_NET], NULL, NULL); 1170 if (err) 1171 return err; 1172 1173 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1174 1175 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1176 } 1177 1178 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1179 { 1180 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1181 if (!msg->rep) 1182 return -ENOMEM; 1183 1184 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1185 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1186 1187 return 0; 1188 } 1189 1190 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1191 { 1192 struct tipc_nl_compat_cmd_dump dump; 1193 struct tipc_nl_compat_cmd_doit doit; 1194 1195 memset(&dump, 0, sizeof(dump)); 1196 memset(&doit, 0, sizeof(doit)); 1197 1198 switch (msg->cmd) { 1199 case TIPC_CMD_NOOP: 1200 msg->rep = tipc_tlv_alloc(0); 1201 if (!msg->rep) 1202 return -ENOMEM; 1203 return 0; 1204 case TIPC_CMD_GET_BEARER_NAMES: 1205 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1206 dump.dumpit = tipc_nl_bearer_dump; 1207 dump.format = tipc_nl_compat_bearer_dump; 1208 return tipc_nl_compat_dumpit(&dump, msg); 1209 case TIPC_CMD_ENABLE_BEARER: 1210 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1211 doit.doit = __tipc_nl_bearer_enable; 1212 doit.transcode = tipc_nl_compat_bearer_enable; 1213 return tipc_nl_compat_doit(&doit, msg); 1214 case TIPC_CMD_DISABLE_BEARER: 1215 msg->req_type = TIPC_TLV_BEARER_NAME; 1216 doit.doit = __tipc_nl_bearer_disable; 1217 doit.transcode = tipc_nl_compat_bearer_disable; 1218 return tipc_nl_compat_doit(&doit, msg); 1219 case TIPC_CMD_SHOW_LINK_STATS: 1220 msg->req_type = TIPC_TLV_LINK_NAME; 1221 msg->rep_size = ULTRA_STRING_MAX_LEN; 1222 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1223 dump.dumpit = tipc_nl_node_dump_link; 1224 dump.format = tipc_nl_compat_link_stat_dump; 1225 return tipc_nl_compat_dumpit(&dump, msg); 1226 case TIPC_CMD_GET_LINKS: 1227 msg->req_type = TIPC_TLV_NET_ADDR; 1228 msg->rep_size = ULTRA_STRING_MAX_LEN; 1229 dump.dumpit = tipc_nl_node_dump_link; 1230 dump.format = tipc_nl_compat_link_dump; 1231 return tipc_nl_compat_dumpit(&dump, msg); 1232 case TIPC_CMD_SET_LINK_TOL: 1233 case TIPC_CMD_SET_LINK_PRI: 1234 case TIPC_CMD_SET_LINK_WINDOW: 1235 msg->req_type = TIPC_TLV_LINK_CONFIG; 1236 doit.doit = tipc_nl_node_set_link; 1237 doit.transcode = tipc_nl_compat_link_set; 1238 return tipc_nl_compat_doit(&doit, msg); 1239 case TIPC_CMD_RESET_LINK_STATS: 1240 msg->req_type = TIPC_TLV_LINK_NAME; 1241 doit.doit = tipc_nl_node_reset_link_stats; 1242 doit.transcode = tipc_nl_compat_link_reset_stats; 1243 return tipc_nl_compat_doit(&doit, msg); 1244 case TIPC_CMD_SHOW_NAME_TABLE: 1245 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1246 msg->rep_size = ULTRA_STRING_MAX_LEN; 1247 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1248 dump.header = tipc_nl_compat_name_table_dump_header; 1249 dump.dumpit = tipc_nl_name_table_dump; 1250 dump.format = tipc_nl_compat_name_table_dump; 1251 return tipc_nl_compat_dumpit(&dump, msg); 1252 case TIPC_CMD_SHOW_PORTS: 1253 msg->rep_size = ULTRA_STRING_MAX_LEN; 1254 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1255 dump.dumpit = tipc_nl_sk_dump; 1256 dump.format = tipc_nl_compat_sk_dump; 1257 return tipc_nl_compat_dumpit(&dump, msg); 1258 case TIPC_CMD_GET_MEDIA_NAMES: 1259 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1260 dump.dumpit = tipc_nl_media_dump; 1261 dump.format = tipc_nl_compat_media_dump; 1262 return tipc_nl_compat_dumpit(&dump, msg); 1263 case TIPC_CMD_GET_NODES: 1264 msg->rep_size = ULTRA_STRING_MAX_LEN; 1265 dump.dumpit = tipc_nl_node_dump; 1266 dump.format = tipc_nl_compat_node_dump; 1267 return tipc_nl_compat_dumpit(&dump, msg); 1268 case TIPC_CMD_SET_NODE_ADDR: 1269 msg->req_type = TIPC_TLV_NET_ADDR; 1270 doit.doit = __tipc_nl_net_set; 1271 doit.transcode = tipc_nl_compat_net_set; 1272 return tipc_nl_compat_doit(&doit, msg); 1273 case TIPC_CMD_SET_NETID: 1274 msg->req_type = TIPC_TLV_UNSIGNED; 1275 doit.doit = __tipc_nl_net_set; 1276 doit.transcode = tipc_nl_compat_net_set; 1277 return tipc_nl_compat_doit(&doit, msg); 1278 case TIPC_CMD_GET_NETID: 1279 msg->rep_size = sizeof(u32); 1280 dump.dumpit = tipc_nl_net_dump; 1281 dump.format = tipc_nl_compat_net_dump; 1282 return tipc_nl_compat_dumpit(&dump, msg); 1283 case TIPC_CMD_SHOW_STATS: 1284 return tipc_cmd_show_stats_compat(msg); 1285 } 1286 1287 return -EOPNOTSUPP; 1288 } 1289 1290 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1291 { 1292 int err; 1293 int len; 1294 struct tipc_nl_compat_msg msg; 1295 struct nlmsghdr *req_nlh; 1296 struct nlmsghdr *rep_nlh; 1297 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1298 1299 memset(&msg, 0, sizeof(msg)); 1300 1301 req_nlh = (struct nlmsghdr *)skb->data; 1302 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1303 msg.cmd = req_userhdr->cmd; 1304 msg.net = genl_info_net(info); 1305 msg.dst_sk = skb->sk; 1306 1307 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1308 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1309 err = -EACCES; 1310 goto send; 1311 } 1312 1313 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1314 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) { 1315 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1316 err = -EOPNOTSUPP; 1317 goto send; 1318 } 1319 1320 err = tipc_nl_compat_handle(&msg); 1321 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1322 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1323 else if (err == -EINVAL) 1324 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1325 send: 1326 if (!msg.rep) 1327 return err; 1328 1329 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1330 skb_push(msg.rep, len); 1331 rep_nlh = nlmsg_hdr(msg.rep); 1332 memcpy(rep_nlh, info->nlhdr, len); 1333 rep_nlh->nlmsg_len = msg.rep->len; 1334 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1335 1336 return err; 1337 } 1338 1339 static const struct genl_small_ops tipc_genl_compat_ops[] = { 1340 { 1341 .cmd = TIPC_GENL_CMD, 1342 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1343 .doit = tipc_nl_compat_recv, 1344 }, 1345 }; 1346 1347 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1348 .name = TIPC_GENL_NAME, 1349 .version = TIPC_GENL_VERSION, 1350 .hdrsize = TIPC_GENL_HDRLEN, 1351 .maxattr = 0, 1352 .netnsok = true, 1353 .module = THIS_MODULE, 1354 .small_ops = tipc_genl_compat_ops, 1355 .n_small_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1356 .resv_start_op = TIPC_GENL_CMD + 1, 1357 }; 1358 1359 int __init tipc_netlink_compat_start(void) 1360 { 1361 int res; 1362 1363 res = genl_register_family(&tipc_genl_compat_family); 1364 if (res) { 1365 pr_err("Failed to register legacy compat interface\n"); 1366 return res; 1367 } 1368 1369 return 0; 1370 } 1371 1372 void tipc_netlink_compat_stop(void) 1373 { 1374 genl_unregister_family(&tipc_genl_compat_family); 1375 } 1376