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