1 /* 2 * Copyright (c) 2014, Ericsson AB 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the names of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "core.h" 35 #include "bearer.h" 36 #include "link.h" 37 #include "name_table.h" 38 #include "socket.h" 39 #include "node.h" 40 #include "net.h" 41 #include <net/genetlink.h> 42 #include <linux/tipc_config.h> 43 44 /* The legacy API had an artificial message length limit called 45 * ULTRA_STRING_MAX_LEN. 46 */ 47 #define ULTRA_STRING_MAX_LEN 32768 48 49 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN) 50 51 #define REPLY_TRUNCATED "<truncated>\n" 52 53 struct tipc_nl_compat_msg { 54 u16 cmd; 55 int rep_type; 56 int rep_size; 57 int req_type; 58 int req_size; 59 struct net *net; 60 struct sk_buff *rep; 61 struct tlv_desc *req; 62 struct sock *dst_sk; 63 }; 64 65 struct tipc_nl_compat_cmd_dump { 66 int (*header)(struct tipc_nl_compat_msg *); 67 int (*dumpit)(struct sk_buff *, struct netlink_callback *); 68 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs); 69 }; 70 71 struct tipc_nl_compat_cmd_doit { 72 int (*doit)(struct sk_buff *skb, struct genl_info *info); 73 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd, 74 struct sk_buff *skb, struct tipc_nl_compat_msg *msg); 75 }; 76 77 static int tipc_skb_tailroom(struct sk_buff *skb) 78 { 79 int tailroom; 80 int limit; 81 82 tailroom = skb_tailroom(skb); 83 limit = TIPC_SKB_MAX - skb->len; 84 85 if (tailroom < limit) 86 return tailroom; 87 88 return limit; 89 } 90 91 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv) 92 { 93 return TLV_GET_LEN(tlv) - TLV_SPACE(0); 94 } 95 96 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) 97 { 98 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb); 99 100 if (tipc_skb_tailroom(skb) < TLV_SPACE(len)) 101 return -EMSGSIZE; 102 103 skb_put(skb, TLV_SPACE(len)); 104 tlv->tlv_type = htons(type); 105 tlv->tlv_len = htons(TLV_LENGTH(len)); 106 if (len && data) 107 memcpy(TLV_DATA(tlv), data, len); 108 109 return 0; 110 } 111 112 static void tipc_tlv_init(struct sk_buff *skb, u16 type) 113 { 114 struct tlv_desc *tlv = (struct tlv_desc *)skb->data; 115 116 TLV_SET_LEN(tlv, 0); 117 TLV_SET_TYPE(tlv, type); 118 skb_put(skb, sizeof(struct tlv_desc)); 119 } 120 121 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...) 122 { 123 int n; 124 u16 len; 125 u32 rem; 126 char *buf; 127 struct tlv_desc *tlv; 128 va_list args; 129 130 rem = tipc_skb_tailroom(skb); 131 132 tlv = (struct tlv_desc *)skb->data; 133 len = TLV_GET_LEN(tlv); 134 buf = TLV_DATA(tlv) + len; 135 136 va_start(args, fmt); 137 n = vscnprintf(buf, rem, fmt, args); 138 va_end(args); 139 140 TLV_SET_LEN(tlv, n + len); 141 skb_put(skb, n); 142 143 return n; 144 } 145 146 static struct sk_buff *tipc_tlv_alloc(int size) 147 { 148 int hdr_len; 149 struct sk_buff *buf; 150 151 size = TLV_SPACE(size); 152 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 153 154 buf = alloc_skb(hdr_len + size, GFP_KERNEL); 155 if (!buf) 156 return NULL; 157 158 skb_reserve(buf, hdr_len); 159 160 return buf; 161 } 162 163 static struct sk_buff *tipc_get_err_tlv(char *str) 164 { 165 int str_len = strlen(str) + 1; 166 struct sk_buff *buf; 167 168 buf = tipc_tlv_alloc(TLV_SPACE(str_len)); 169 if (buf) 170 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len); 171 172 return buf; 173 } 174 175 static inline bool string_is_valid(char *s, int len) 176 { 177 return memchr(s, '\0', len) ? true : false; 178 } 179 180 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 181 struct tipc_nl_compat_msg *msg, 182 struct sk_buff *arg) 183 { 184 int len = 0; 185 int err; 186 struct sk_buff *buf; 187 struct nlmsghdr *nlmsg; 188 struct netlink_callback cb; 189 struct nlattr **attrbuf; 190 191 memset(&cb, 0, sizeof(cb)); 192 cb.nlh = (struct nlmsghdr *)arg->data; 193 cb.skb = arg; 194 195 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 196 if (!buf) 197 return -ENOMEM; 198 199 buf->sk = msg->dst_sk; 200 if (__tipc_dump_start(&cb, msg->net)) { 201 kfree_skb(buf); 202 return -ENOMEM; 203 } 204 205 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1, 206 sizeof(struct nlattr *), GFP_KERNEL); 207 if (!attrbuf) { 208 err = -ENOMEM; 209 goto err_out; 210 } 211 212 do { 213 int rem; 214 215 len = (*cmd->dumpit)(buf, &cb); 216 217 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { 218 err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN, 219 attrbuf, 220 tipc_genl_family.maxattr, 221 tipc_genl_family.policy, 222 NULL); 223 if (err) 224 goto err_out; 225 226 err = (*cmd->format)(msg, attrbuf); 227 if (err) 228 goto err_out; 229 230 if (tipc_skb_tailroom(msg->rep) <= 1) { 231 err = -EMSGSIZE; 232 goto err_out; 233 } 234 } 235 236 skb_reset_tail_pointer(buf); 237 buf->len = 0; 238 239 } while (len); 240 241 err = 0; 242 243 err_out: 244 kfree(attrbuf); 245 tipc_dump_done(&cb); 246 kfree_skb(buf); 247 248 if (err == -EMSGSIZE) { 249 /* The legacy API only considered messages filling 250 * "ULTRA_STRING_MAX_LEN" to be truncated. 251 */ 252 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { 253 char *tail = skb_tail_pointer(msg->rep); 254 255 if (*tail != '\0') 256 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, 257 REPLY_TRUNCATED); 258 } 259 260 return 0; 261 } 262 263 return err; 264 } 265 266 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 267 struct tipc_nl_compat_msg *msg) 268 { 269 int err; 270 struct sk_buff *arg; 271 272 if (msg->req_type && (!msg->req_size || 273 !TLV_CHECK_TYPE(msg->req, msg->req_type))) 274 return -EINVAL; 275 276 msg->rep = tipc_tlv_alloc(msg->rep_size); 277 if (!msg->rep) 278 return -ENOMEM; 279 280 if (msg->rep_type) 281 tipc_tlv_init(msg->rep, msg->rep_type); 282 283 if (cmd->header) { 284 err = (*cmd->header)(msg); 285 if (err) { 286 kfree_skb(msg->rep); 287 msg->rep = NULL; 288 return err; 289 } 290 } 291 292 arg = nlmsg_new(0, GFP_KERNEL); 293 if (!arg) { 294 kfree_skb(msg->rep); 295 msg->rep = NULL; 296 return -ENOMEM; 297 } 298 299 err = __tipc_nl_compat_dumpit(cmd, msg, arg); 300 if (err) { 301 kfree_skb(msg->rep); 302 msg->rep = NULL; 303 } 304 kfree_skb(arg); 305 306 return err; 307 } 308 309 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 310 struct tipc_nl_compat_msg *msg) 311 { 312 int err; 313 struct sk_buff *doit_buf; 314 struct sk_buff *trans_buf; 315 struct nlattr **attrbuf; 316 struct genl_info info; 317 318 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 319 if (!trans_buf) 320 return -ENOMEM; 321 322 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1, 323 sizeof(struct nlattr *), 324 GFP_KERNEL); 325 if (!attrbuf) { 326 err = -ENOMEM; 327 goto trans_out; 328 } 329 330 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 331 if (!doit_buf) { 332 err = -ENOMEM; 333 goto attrbuf_out; 334 } 335 336 memset(&info, 0, sizeof(info)); 337 info.attrs = attrbuf; 338 339 rtnl_lock(); 340 err = (*cmd->transcode)(cmd, trans_buf, msg); 341 if (err) 342 goto doit_out; 343 344 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr, 345 (const struct nlattr *)trans_buf->data, 346 trans_buf->len, NULL, NULL); 347 if (err) 348 goto doit_out; 349 350 doit_buf->sk = msg->dst_sk; 351 352 err = (*cmd->doit)(doit_buf, &info); 353 doit_out: 354 rtnl_unlock(); 355 356 kfree_skb(doit_buf); 357 attrbuf_out: 358 kfree(attrbuf); 359 trans_out: 360 kfree_skb(trans_buf); 361 362 return err; 363 } 364 365 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 366 struct tipc_nl_compat_msg *msg) 367 { 368 int err; 369 370 if (msg->req_type && (!msg->req_size || 371 !TLV_CHECK_TYPE(msg->req, msg->req_type))) 372 return -EINVAL; 373 374 err = __tipc_nl_compat_doit(cmd, msg); 375 if (err) 376 return err; 377 378 /* The legacy API considered an empty message a success message */ 379 msg->rep = tipc_tlv_alloc(0); 380 if (!msg->rep) 381 return -ENOMEM; 382 383 return 0; 384 } 385 386 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, 387 struct nlattr **attrs) 388 { 389 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; 390 int err; 391 392 if (!attrs[TIPC_NLA_BEARER]) 393 return -EINVAL; 394 395 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX, 396 attrs[TIPC_NLA_BEARER], NULL, NULL); 397 if (err) 398 return err; 399 400 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, 401 nla_data(bearer[TIPC_NLA_BEARER_NAME]), 402 nla_len(bearer[TIPC_NLA_BEARER_NAME])); 403 } 404 405 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, 406 struct sk_buff *skb, 407 struct tipc_nl_compat_msg *msg) 408 { 409 struct nlattr *prop; 410 struct nlattr *bearer; 411 struct tipc_bearer_config *b; 412 int len; 413 414 b = (struct tipc_bearer_config *)TLV_DATA(msg->req); 415 416 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 417 if (!bearer) 418 return -EMSGSIZE; 419 420 len = TLV_GET_DATA_LEN(msg->req); 421 len -= offsetof(struct tipc_bearer_config, name); 422 if (len <= 0) 423 return -EINVAL; 424 425 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 426 if (!string_is_valid(b->name, len)) 427 return -EINVAL; 428 429 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) 430 return -EMSGSIZE; 431 432 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) 433 return -EMSGSIZE; 434 435 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { 436 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 437 if (!prop) 438 return -EMSGSIZE; 439 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) 440 return -EMSGSIZE; 441 nla_nest_end(skb, prop); 442 } 443 nla_nest_end(skb, bearer); 444 445 return 0; 446 } 447 448 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, 449 struct sk_buff *skb, 450 struct tipc_nl_compat_msg *msg) 451 { 452 char *name; 453 struct nlattr *bearer; 454 int len; 455 456 name = (char *)TLV_DATA(msg->req); 457 458 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 459 if (!bearer) 460 return -EMSGSIZE; 461 462 len = TLV_GET_DATA_LEN(msg->req); 463 if (len <= 0) 464 return -EINVAL; 465 466 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 467 if (!string_is_valid(name, len)) 468 return -EINVAL; 469 470 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 471 return -EMSGSIZE; 472 473 nla_nest_end(skb, bearer); 474 475 return 0; 476 } 477 478 static inline u32 perc(u32 count, u32 total) 479 { 480 return (count * 100 + (total / 2)) / total; 481 } 482 483 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 484 struct nlattr *prop[], struct nlattr *stats[]) 485 { 486 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 487 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 488 489 tipc_tlv_sprintf(msg->rep, 490 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 491 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 492 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 493 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 494 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 495 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 496 497 tipc_tlv_sprintf(msg->rep, 498 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 499 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 500 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 501 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 502 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 503 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 504 505 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 506 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 507 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 508 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 509 510 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 511 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 512 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 513 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 514 515 tipc_tlv_sprintf(msg->rep, 516 " Congestion link:%u Send queue max:%u avg:%u", 517 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 518 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 519 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 520 } 521 522 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 523 struct nlattr **attrs) 524 { 525 char *name; 526 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 527 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 528 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 529 int err; 530 int len; 531 532 if (!attrs[TIPC_NLA_LINK]) 533 return -EINVAL; 534 535 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 536 attrs[TIPC_NLA_LINK], NULL, NULL); 537 if (err) 538 return err; 539 540 if (!link[TIPC_NLA_LINK_PROP]) 541 return -EINVAL; 542 543 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX, 544 link[TIPC_NLA_LINK_PROP], NULL, 545 NULL); 546 if (err) 547 return err; 548 549 if (!link[TIPC_NLA_LINK_STATS]) 550 return -EINVAL; 551 552 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX, 553 link[TIPC_NLA_LINK_STATS], NULL, 554 NULL); 555 if (err) 556 return err; 557 558 name = (char *)TLV_DATA(msg->req); 559 560 len = TLV_GET_DATA_LEN(msg->req); 561 if (len <= 0) 562 return -EINVAL; 563 564 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 565 if (!string_is_valid(name, len)) 566 return -EINVAL; 567 568 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 569 return 0; 570 571 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 572 nla_data(link[TIPC_NLA_LINK_NAME])); 573 574 if (link[TIPC_NLA_LINK_BROADCAST]) { 575 __fill_bc_link_stat(msg, prop, stats); 576 return 0; 577 } 578 579 if (link[TIPC_NLA_LINK_ACTIVE]) 580 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 581 else if (link[TIPC_NLA_LINK_UP]) 582 tipc_tlv_sprintf(msg->rep, " STANDBY"); 583 else 584 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 585 586 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 587 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 588 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 589 590 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 591 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 592 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 593 594 tipc_tlv_sprintf(msg->rep, 595 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 596 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 597 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 598 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 599 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 600 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 601 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 602 603 tipc_tlv_sprintf(msg->rep, 604 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 605 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 606 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 607 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 608 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 609 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 610 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 611 612 tipc_tlv_sprintf(msg->rep, 613 " TX profile sample:%u packets average:%u octets\n", 614 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 615 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 616 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 617 618 tipc_tlv_sprintf(msg->rep, 619 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 620 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 621 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 622 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 623 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 624 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 625 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 626 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 627 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 628 629 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 630 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 631 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 632 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 633 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 634 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 635 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 636 637 tipc_tlv_sprintf(msg->rep, 638 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 639 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 640 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 641 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 642 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 643 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 644 645 tipc_tlv_sprintf(msg->rep, 646 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 647 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 648 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 649 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 650 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 651 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 652 653 tipc_tlv_sprintf(msg->rep, 654 " Congestion link:%u Send queue max:%u avg:%u", 655 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 656 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 657 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 658 659 return 0; 660 } 661 662 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 663 struct nlattr **attrs) 664 { 665 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 666 struct tipc_link_info link_info; 667 int err; 668 669 if (!attrs[TIPC_NLA_LINK]) 670 return -EINVAL; 671 672 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX, 673 attrs[TIPC_NLA_LINK], NULL, NULL); 674 if (err) 675 return err; 676 677 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); 678 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 679 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME], 680 TIPC_MAX_LINK_NAME); 681 682 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 683 &link_info, sizeof(link_info)); 684 } 685 686 static int __tipc_add_link_prop(struct sk_buff *skb, 687 struct tipc_nl_compat_msg *msg, 688 struct tipc_link_config *lc) 689 { 690 switch (msg->cmd) { 691 case TIPC_CMD_SET_LINK_PRI: 692 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 693 case TIPC_CMD_SET_LINK_TOL: 694 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 695 case TIPC_CMD_SET_LINK_WINDOW: 696 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 697 } 698 699 return -EINVAL; 700 } 701 702 static int tipc_nl_compat_media_set(struct sk_buff *skb, 703 struct tipc_nl_compat_msg *msg) 704 { 705 struct nlattr *prop; 706 struct nlattr *media; 707 struct tipc_link_config *lc; 708 709 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 710 711 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA); 712 if (!media) 713 return -EMSGSIZE; 714 715 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 716 return -EMSGSIZE; 717 718 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP); 719 if (!prop) 720 return -EMSGSIZE; 721 722 __tipc_add_link_prop(skb, msg, lc); 723 nla_nest_end(skb, prop); 724 nla_nest_end(skb, media); 725 726 return 0; 727 } 728 729 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 730 struct tipc_nl_compat_msg *msg) 731 { 732 struct nlattr *prop; 733 struct nlattr *bearer; 734 struct tipc_link_config *lc; 735 736 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 737 738 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER); 739 if (!bearer) 740 return -EMSGSIZE; 741 742 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 743 return -EMSGSIZE; 744 745 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP); 746 if (!prop) 747 return -EMSGSIZE; 748 749 __tipc_add_link_prop(skb, msg, lc); 750 nla_nest_end(skb, prop); 751 nla_nest_end(skb, bearer); 752 753 return 0; 754 } 755 756 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 757 struct tipc_nl_compat_msg *msg) 758 { 759 struct nlattr *prop; 760 struct nlattr *link; 761 struct tipc_link_config *lc; 762 763 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 764 765 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 766 if (!link) 767 return -EMSGSIZE; 768 769 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 770 return -EMSGSIZE; 771 772 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP); 773 if (!prop) 774 return -EMSGSIZE; 775 776 __tipc_add_link_prop(skb, msg, lc); 777 nla_nest_end(skb, prop); 778 nla_nest_end(skb, link); 779 780 return 0; 781 } 782 783 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 784 struct sk_buff *skb, 785 struct tipc_nl_compat_msg *msg) 786 { 787 struct tipc_link_config *lc; 788 struct tipc_bearer *bearer; 789 struct tipc_media *media; 790 int len; 791 792 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 793 794 len = TLV_GET_DATA_LEN(msg->req); 795 len -= offsetof(struct tipc_link_config, name); 796 if (len <= 0) 797 return -EINVAL; 798 799 len = min_t(int, len, TIPC_MAX_LINK_NAME); 800 if (!string_is_valid(lc->name, len)) 801 return -EINVAL; 802 803 media = tipc_media_find(lc->name); 804 if (media) { 805 cmd->doit = &__tipc_nl_media_set; 806 return tipc_nl_compat_media_set(skb, msg); 807 } 808 809 bearer = tipc_bearer_find(msg->net, lc->name); 810 if (bearer) { 811 cmd->doit = &__tipc_nl_bearer_set; 812 return tipc_nl_compat_bearer_set(skb, msg); 813 } 814 815 return __tipc_nl_compat_link_set(skb, msg); 816 } 817 818 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 819 struct sk_buff *skb, 820 struct tipc_nl_compat_msg *msg) 821 { 822 char *name; 823 struct nlattr *link; 824 int len; 825 826 name = (char *)TLV_DATA(msg->req); 827 828 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK); 829 if (!link) 830 return -EMSGSIZE; 831 832 len = TLV_GET_DATA_LEN(msg->req); 833 if (len <= 0) 834 return -EINVAL; 835 836 len = min_t(int, len, TIPC_MAX_BEARER_NAME); 837 if (!string_is_valid(name, len)) 838 return -EINVAL; 839 840 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 841 return -EMSGSIZE; 842 843 nla_nest_end(skb, link); 844 845 return 0; 846 } 847 848 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 849 { 850 int i; 851 u32 depth; 852 struct tipc_name_table_query *ntq; 853 static const char * const header[] = { 854 "Type ", 855 "Lower Upper ", 856 "Port Identity ", 857 "Publication Scope" 858 }; 859 860 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 861 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query)) 862 return -EINVAL; 863 864 depth = ntohl(ntq->depth); 865 866 if (depth > 4) 867 depth = 4; 868 for (i = 0; i < depth; i++) 869 tipc_tlv_sprintf(msg->rep, header[i]); 870 tipc_tlv_sprintf(msg->rep, "\n"); 871 872 return 0; 873 } 874 875 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 876 struct nlattr **attrs) 877 { 878 char port_str[27]; 879 struct tipc_name_table_query *ntq; 880 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 881 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 882 u32 node, depth, type, lowbound, upbound; 883 static const char * const scope_str[] = {"", " zone", " cluster", 884 " node"}; 885 int err; 886 887 if (!attrs[TIPC_NLA_NAME_TABLE]) 888 return -EINVAL; 889 890 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX, 891 attrs[TIPC_NLA_NAME_TABLE], NULL, 892 NULL); 893 if (err) 894 return err; 895 896 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 897 return -EINVAL; 898 899 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 900 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, 901 NULL); 902 if (err) 903 return err; 904 905 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 906 907 depth = ntohl(ntq->depth); 908 type = ntohl(ntq->type); 909 lowbound = ntohl(ntq->lowbound); 910 upbound = ntohl(ntq->upbound); 911 912 if (!(depth & TIPC_NTQ_ALLTYPES) && 913 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 914 return 0; 915 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 916 return 0; 917 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 918 return 0; 919 920 tipc_tlv_sprintf(msg->rep, "%-10u ", 921 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 922 923 if (depth == 1) 924 goto out; 925 926 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 927 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 928 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 929 930 if (depth == 2) 931 goto out; 932 933 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 934 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 935 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 936 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 937 938 if (depth == 3) 939 goto out; 940 941 tipc_tlv_sprintf(msg->rep, "%-10u %s", 942 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 943 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 944 out: 945 tipc_tlv_sprintf(msg->rep, "\n"); 946 947 return 0; 948 } 949 950 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 951 struct nlattr **attrs) 952 { 953 u32 type, lower, upper; 954 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 955 int err; 956 957 if (!attrs[TIPC_NLA_PUBL]) 958 return -EINVAL; 959 960 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX, 961 attrs[TIPC_NLA_PUBL], NULL, NULL); 962 if (err) 963 return err; 964 965 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 966 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 967 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 968 969 if (lower == upper) 970 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 971 else 972 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 973 974 return 0; 975 } 976 977 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 978 { 979 int err; 980 void *hdr; 981 struct nlattr *nest; 982 struct sk_buff *args; 983 struct tipc_nl_compat_cmd_dump dump; 984 985 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 986 if (!args) 987 return -ENOMEM; 988 989 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 990 TIPC_NL_PUBL_GET); 991 if (!hdr) { 992 kfree_skb(args); 993 return -EMSGSIZE; 994 } 995 996 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK); 997 if (!nest) { 998 kfree_skb(args); 999 return -EMSGSIZE; 1000 } 1001 1002 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 1003 kfree_skb(args); 1004 return -EMSGSIZE; 1005 } 1006 1007 nla_nest_end(args, nest); 1008 genlmsg_end(args, hdr); 1009 1010 dump.dumpit = tipc_nl_publ_dump; 1011 dump.format = __tipc_nl_compat_publ_dump; 1012 1013 err = __tipc_nl_compat_dumpit(&dump, msg, args); 1014 1015 kfree_skb(args); 1016 1017 return err; 1018 } 1019 1020 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 1021 struct nlattr **attrs) 1022 { 1023 int err; 1024 u32 sock_ref; 1025 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 1026 1027 if (!attrs[TIPC_NLA_SOCK]) 1028 return -EINVAL; 1029 1030 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, 1031 attrs[TIPC_NLA_SOCK], NULL, NULL); 1032 if (err) 1033 return err; 1034 1035 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 1036 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 1037 1038 if (sock[TIPC_NLA_SOCK_CON]) { 1039 u32 node; 1040 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 1041 1042 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX, 1043 sock[TIPC_NLA_SOCK_CON], 1044 NULL, NULL); 1045 1046 if (err) 1047 return err; 1048 1049 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 1050 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 1051 tipc_zone(node), 1052 tipc_cluster(node), 1053 tipc_node(node), 1054 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 1055 1056 if (con[TIPC_NLA_CON_FLAG]) 1057 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 1058 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 1059 nla_get_u32(con[TIPC_NLA_CON_INST])); 1060 else 1061 tipc_tlv_sprintf(msg->rep, "\n"); 1062 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 1063 tipc_tlv_sprintf(msg->rep, " bound to"); 1064 1065 err = tipc_nl_compat_publ_dump(msg, sock_ref); 1066 if (err) 1067 return err; 1068 } 1069 tipc_tlv_sprintf(msg->rep, "\n"); 1070 1071 return 0; 1072 } 1073 1074 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 1075 struct nlattr **attrs) 1076 { 1077 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 1078 int err; 1079 1080 if (!attrs[TIPC_NLA_MEDIA]) 1081 return -EINVAL; 1082 1083 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX, 1084 attrs[TIPC_NLA_MEDIA], NULL, NULL); 1085 if (err) 1086 return err; 1087 1088 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 1089 nla_data(media[TIPC_NLA_MEDIA_NAME]), 1090 nla_len(media[TIPC_NLA_MEDIA_NAME])); 1091 } 1092 1093 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 1094 struct nlattr **attrs) 1095 { 1096 struct tipc_node_info node_info; 1097 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 1098 int err; 1099 1100 if (!attrs[TIPC_NLA_NODE]) 1101 return -EINVAL; 1102 1103 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX, 1104 attrs[TIPC_NLA_NODE], NULL, NULL); 1105 if (err) 1106 return err; 1107 1108 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1109 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1110 1111 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1112 sizeof(node_info)); 1113 } 1114 1115 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1116 struct sk_buff *skb, 1117 struct tipc_nl_compat_msg *msg) 1118 { 1119 u32 val; 1120 struct nlattr *net; 1121 1122 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1123 1124 net = nla_nest_start_noflag(skb, TIPC_NLA_NET); 1125 if (!net) 1126 return -EMSGSIZE; 1127 1128 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1129 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1130 return -EMSGSIZE; 1131 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1132 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1133 return -EMSGSIZE; 1134 } 1135 nla_nest_end(skb, net); 1136 1137 return 0; 1138 } 1139 1140 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1141 struct nlattr **attrs) 1142 { 1143 __be32 id; 1144 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1145 int err; 1146 1147 if (!attrs[TIPC_NLA_NET]) 1148 return -EINVAL; 1149 1150 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX, 1151 attrs[TIPC_NLA_NET], NULL, NULL); 1152 if (err) 1153 return err; 1154 1155 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1156 1157 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1158 } 1159 1160 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1161 { 1162 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1163 if (!msg->rep) 1164 return -ENOMEM; 1165 1166 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1167 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1168 1169 return 0; 1170 } 1171 1172 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1173 { 1174 struct tipc_nl_compat_cmd_dump dump; 1175 struct tipc_nl_compat_cmd_doit doit; 1176 1177 memset(&dump, 0, sizeof(dump)); 1178 memset(&doit, 0, sizeof(doit)); 1179 1180 switch (msg->cmd) { 1181 case TIPC_CMD_NOOP: 1182 msg->rep = tipc_tlv_alloc(0); 1183 if (!msg->rep) 1184 return -ENOMEM; 1185 return 0; 1186 case TIPC_CMD_GET_BEARER_NAMES: 1187 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1188 dump.dumpit = tipc_nl_bearer_dump; 1189 dump.format = tipc_nl_compat_bearer_dump; 1190 return tipc_nl_compat_dumpit(&dump, msg); 1191 case TIPC_CMD_ENABLE_BEARER: 1192 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1193 doit.doit = __tipc_nl_bearer_enable; 1194 doit.transcode = tipc_nl_compat_bearer_enable; 1195 return tipc_nl_compat_doit(&doit, msg); 1196 case TIPC_CMD_DISABLE_BEARER: 1197 msg->req_type = TIPC_TLV_BEARER_NAME; 1198 doit.doit = __tipc_nl_bearer_disable; 1199 doit.transcode = tipc_nl_compat_bearer_disable; 1200 return tipc_nl_compat_doit(&doit, msg); 1201 case TIPC_CMD_SHOW_LINK_STATS: 1202 msg->req_type = TIPC_TLV_LINK_NAME; 1203 msg->rep_size = ULTRA_STRING_MAX_LEN; 1204 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1205 dump.dumpit = tipc_nl_node_dump_link; 1206 dump.format = tipc_nl_compat_link_stat_dump; 1207 return tipc_nl_compat_dumpit(&dump, msg); 1208 case TIPC_CMD_GET_LINKS: 1209 msg->req_type = TIPC_TLV_NET_ADDR; 1210 msg->rep_size = ULTRA_STRING_MAX_LEN; 1211 dump.dumpit = tipc_nl_node_dump_link; 1212 dump.format = tipc_nl_compat_link_dump; 1213 return tipc_nl_compat_dumpit(&dump, msg); 1214 case TIPC_CMD_SET_LINK_TOL: 1215 case TIPC_CMD_SET_LINK_PRI: 1216 case TIPC_CMD_SET_LINK_WINDOW: 1217 msg->req_type = TIPC_TLV_LINK_CONFIG; 1218 doit.doit = tipc_nl_node_set_link; 1219 doit.transcode = tipc_nl_compat_link_set; 1220 return tipc_nl_compat_doit(&doit, msg); 1221 case TIPC_CMD_RESET_LINK_STATS: 1222 msg->req_type = TIPC_TLV_LINK_NAME; 1223 doit.doit = tipc_nl_node_reset_link_stats; 1224 doit.transcode = tipc_nl_compat_link_reset_stats; 1225 return tipc_nl_compat_doit(&doit, msg); 1226 case TIPC_CMD_SHOW_NAME_TABLE: 1227 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1228 msg->rep_size = ULTRA_STRING_MAX_LEN; 1229 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1230 dump.header = tipc_nl_compat_name_table_dump_header; 1231 dump.dumpit = tipc_nl_name_table_dump; 1232 dump.format = tipc_nl_compat_name_table_dump; 1233 return tipc_nl_compat_dumpit(&dump, msg); 1234 case TIPC_CMD_SHOW_PORTS: 1235 msg->rep_size = ULTRA_STRING_MAX_LEN; 1236 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1237 dump.dumpit = tipc_nl_sk_dump; 1238 dump.format = tipc_nl_compat_sk_dump; 1239 return tipc_nl_compat_dumpit(&dump, msg); 1240 case TIPC_CMD_GET_MEDIA_NAMES: 1241 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1242 dump.dumpit = tipc_nl_media_dump; 1243 dump.format = tipc_nl_compat_media_dump; 1244 return tipc_nl_compat_dumpit(&dump, msg); 1245 case TIPC_CMD_GET_NODES: 1246 msg->rep_size = ULTRA_STRING_MAX_LEN; 1247 dump.dumpit = tipc_nl_node_dump; 1248 dump.format = tipc_nl_compat_node_dump; 1249 return tipc_nl_compat_dumpit(&dump, msg); 1250 case TIPC_CMD_SET_NODE_ADDR: 1251 msg->req_type = TIPC_TLV_NET_ADDR; 1252 doit.doit = __tipc_nl_net_set; 1253 doit.transcode = tipc_nl_compat_net_set; 1254 return tipc_nl_compat_doit(&doit, msg); 1255 case TIPC_CMD_SET_NETID: 1256 msg->req_type = TIPC_TLV_UNSIGNED; 1257 doit.doit = __tipc_nl_net_set; 1258 doit.transcode = tipc_nl_compat_net_set; 1259 return tipc_nl_compat_doit(&doit, msg); 1260 case TIPC_CMD_GET_NETID: 1261 msg->rep_size = sizeof(u32); 1262 dump.dumpit = tipc_nl_net_dump; 1263 dump.format = tipc_nl_compat_net_dump; 1264 return tipc_nl_compat_dumpit(&dump, msg); 1265 case TIPC_CMD_SHOW_STATS: 1266 return tipc_cmd_show_stats_compat(msg); 1267 } 1268 1269 return -EOPNOTSUPP; 1270 } 1271 1272 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1273 { 1274 int err; 1275 int len; 1276 struct tipc_nl_compat_msg msg; 1277 struct nlmsghdr *req_nlh; 1278 struct nlmsghdr *rep_nlh; 1279 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1280 1281 memset(&msg, 0, sizeof(msg)); 1282 1283 req_nlh = (struct nlmsghdr *)skb->data; 1284 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1285 msg.cmd = req_userhdr->cmd; 1286 msg.net = genl_info_net(info); 1287 msg.dst_sk = skb->sk; 1288 1289 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1290 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1291 err = -EACCES; 1292 goto send; 1293 } 1294 1295 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1296 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) { 1297 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1298 err = -EOPNOTSUPP; 1299 goto send; 1300 } 1301 1302 err = tipc_nl_compat_handle(&msg); 1303 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1304 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1305 else if (err == -EINVAL) 1306 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1307 send: 1308 if (!msg.rep) 1309 return err; 1310 1311 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1312 skb_push(msg.rep, len); 1313 rep_nlh = nlmsg_hdr(msg.rep); 1314 memcpy(rep_nlh, info->nlhdr, len); 1315 rep_nlh->nlmsg_len = msg.rep->len; 1316 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1317 1318 return err; 1319 } 1320 1321 static const struct genl_ops tipc_genl_compat_ops[] = { 1322 { 1323 .cmd = TIPC_GENL_CMD, 1324 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 1325 .doit = tipc_nl_compat_recv, 1326 }, 1327 }; 1328 1329 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1330 .name = TIPC_GENL_NAME, 1331 .version = TIPC_GENL_VERSION, 1332 .hdrsize = TIPC_GENL_HDRLEN, 1333 .maxattr = 0, 1334 .netnsok = true, 1335 .module = THIS_MODULE, 1336 .ops = tipc_genl_compat_ops, 1337 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1338 }; 1339 1340 int __init tipc_netlink_compat_start(void) 1341 { 1342 int res; 1343 1344 res = genl_register_family(&tipc_genl_compat_family); 1345 if (res) { 1346 pr_err("Failed to register legacy compat interface\n"); 1347 return res; 1348 } 1349 1350 return 0; 1351 } 1352 1353 void tipc_netlink_compat_stop(void) 1354 { 1355 genl_unregister_family(&tipc_genl_compat_family); 1356 } 1357