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