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