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