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