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 if (__tipc_dump_start(&cb, msg->net)) { 189 kfree_skb(buf); 190 return -ENOMEM; 191 } 192 193 do { 194 int rem; 195 196 len = (*cmd->dumpit)(buf, &cb); 197 198 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { 199 struct nlattr **attrs; 200 201 err = tipc_nlmsg_parse(nlmsg, &attrs); 202 if (err) 203 goto err_out; 204 205 err = (*cmd->format)(msg, attrs); 206 if (err) 207 goto err_out; 208 209 if (tipc_skb_tailroom(msg->rep) <= 1) { 210 err = -EMSGSIZE; 211 goto err_out; 212 } 213 } 214 215 skb_reset_tail_pointer(buf); 216 buf->len = 0; 217 218 } while (len); 219 220 err = 0; 221 222 err_out: 223 tipc_dump_done(&cb); 224 kfree_skb(buf); 225 226 if (err == -EMSGSIZE) { 227 /* The legacy API only considered messages filling 228 * "ULTRA_STRING_MAX_LEN" to be truncated. 229 */ 230 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { 231 char *tail = skb_tail_pointer(msg->rep); 232 233 if (*tail != '\0') 234 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, 235 REPLY_TRUNCATED); 236 } 237 238 return 0; 239 } 240 241 return err; 242 } 243 244 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, 245 struct tipc_nl_compat_msg *msg) 246 { 247 int err; 248 struct sk_buff *arg; 249 250 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) 251 return -EINVAL; 252 253 msg->rep = tipc_tlv_alloc(msg->rep_size); 254 if (!msg->rep) 255 return -ENOMEM; 256 257 if (msg->rep_type) 258 tipc_tlv_init(msg->rep, msg->rep_type); 259 260 if (cmd->header) 261 (*cmd->header)(msg); 262 263 arg = nlmsg_new(0, GFP_KERNEL); 264 if (!arg) { 265 kfree_skb(msg->rep); 266 msg->rep = NULL; 267 return -ENOMEM; 268 } 269 270 err = __tipc_nl_compat_dumpit(cmd, msg, arg); 271 if (err) { 272 kfree_skb(msg->rep); 273 msg->rep = NULL; 274 } 275 kfree_skb(arg); 276 277 return err; 278 } 279 280 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 281 struct tipc_nl_compat_msg *msg) 282 { 283 int err; 284 struct sk_buff *doit_buf; 285 struct sk_buff *trans_buf; 286 struct nlattr **attrbuf; 287 struct genl_info info; 288 289 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 290 if (!trans_buf) 291 return -ENOMEM; 292 293 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1, 294 sizeof(struct nlattr *), 295 GFP_KERNEL); 296 if (!attrbuf) { 297 err = -ENOMEM; 298 goto trans_out; 299 } 300 301 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); 302 if (!doit_buf) { 303 err = -ENOMEM; 304 goto attrbuf_out; 305 } 306 307 memset(&info, 0, sizeof(info)); 308 info.attrs = attrbuf; 309 310 rtnl_lock(); 311 err = (*cmd->transcode)(cmd, trans_buf, msg); 312 if (err) 313 goto doit_out; 314 315 err = nla_parse(attrbuf, tipc_genl_family.maxattr, 316 (const struct nlattr *)trans_buf->data, 317 trans_buf->len, NULL, NULL); 318 if (err) 319 goto doit_out; 320 321 doit_buf->sk = msg->dst_sk; 322 323 err = (*cmd->doit)(doit_buf, &info); 324 doit_out: 325 rtnl_unlock(); 326 327 kfree_skb(doit_buf); 328 attrbuf_out: 329 kfree(attrbuf); 330 trans_out: 331 kfree_skb(trans_buf); 332 333 return err; 334 } 335 336 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, 337 struct tipc_nl_compat_msg *msg) 338 { 339 int err; 340 341 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) 342 return -EINVAL; 343 344 err = __tipc_nl_compat_doit(cmd, msg); 345 if (err) 346 return err; 347 348 /* The legacy API considered an empty message a success message */ 349 msg->rep = tipc_tlv_alloc(0); 350 if (!msg->rep) 351 return -ENOMEM; 352 353 return 0; 354 } 355 356 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, 357 struct nlattr **attrs) 358 { 359 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; 360 int err; 361 362 if (!attrs[TIPC_NLA_BEARER]) 363 return -EINVAL; 364 365 err = nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, 366 attrs[TIPC_NLA_BEARER], NULL, NULL); 367 if (err) 368 return err; 369 370 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, 371 nla_data(bearer[TIPC_NLA_BEARER_NAME]), 372 nla_len(bearer[TIPC_NLA_BEARER_NAME])); 373 } 374 375 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, 376 struct sk_buff *skb, 377 struct tipc_nl_compat_msg *msg) 378 { 379 struct nlattr *prop; 380 struct nlattr *bearer; 381 struct tipc_bearer_config *b; 382 383 b = (struct tipc_bearer_config *)TLV_DATA(msg->req); 384 385 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 386 if (!bearer) 387 return -EMSGSIZE; 388 389 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) 390 return -EMSGSIZE; 391 392 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) 393 return -EMSGSIZE; 394 395 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { 396 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); 397 if (!prop) 398 return -EMSGSIZE; 399 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) 400 return -EMSGSIZE; 401 nla_nest_end(skb, prop); 402 } 403 nla_nest_end(skb, bearer); 404 405 return 0; 406 } 407 408 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, 409 struct sk_buff *skb, 410 struct tipc_nl_compat_msg *msg) 411 { 412 char *name; 413 struct nlattr *bearer; 414 415 name = (char *)TLV_DATA(msg->req); 416 417 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 418 if (!bearer) 419 return -EMSGSIZE; 420 421 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) 422 return -EMSGSIZE; 423 424 nla_nest_end(skb, bearer); 425 426 return 0; 427 } 428 429 static inline u32 perc(u32 count, u32 total) 430 { 431 return (count * 100 + (total / 2)) / total; 432 } 433 434 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, 435 struct nlattr *prop[], struct nlattr *stats[]) 436 { 437 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", 438 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 439 440 tipc_tlv_sprintf(msg->rep, 441 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 442 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 443 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 444 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 445 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 446 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 447 448 tipc_tlv_sprintf(msg->rep, 449 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 450 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 451 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 452 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 453 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 454 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 455 456 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", 457 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 458 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 459 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 460 461 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", 462 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 463 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 464 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 465 466 tipc_tlv_sprintf(msg->rep, 467 " Congestion link:%u Send queue max:%u avg:%u", 468 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 469 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 470 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 471 } 472 473 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, 474 struct nlattr **attrs) 475 { 476 char *name; 477 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 478 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; 479 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; 480 int err; 481 482 if (!attrs[TIPC_NLA_LINK]) 483 return -EINVAL; 484 485 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], 486 NULL, NULL); 487 if (err) 488 return err; 489 490 if (!link[TIPC_NLA_LINK_PROP]) 491 return -EINVAL; 492 493 err = nla_parse_nested(prop, TIPC_NLA_PROP_MAX, 494 link[TIPC_NLA_LINK_PROP], NULL, NULL); 495 if (err) 496 return err; 497 498 if (!link[TIPC_NLA_LINK_STATS]) 499 return -EINVAL; 500 501 err = nla_parse_nested(stats, TIPC_NLA_STATS_MAX, 502 link[TIPC_NLA_LINK_STATS], NULL, NULL); 503 if (err) 504 return err; 505 506 name = (char *)TLV_DATA(msg->req); 507 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) 508 return 0; 509 510 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", 511 nla_data(link[TIPC_NLA_LINK_NAME])); 512 513 if (link[TIPC_NLA_LINK_BROADCAST]) { 514 __fill_bc_link_stat(msg, prop, stats); 515 return 0; 516 } 517 518 if (link[TIPC_NLA_LINK_ACTIVE]) 519 tipc_tlv_sprintf(msg->rep, " ACTIVE"); 520 else if (link[TIPC_NLA_LINK_UP]) 521 tipc_tlv_sprintf(msg->rep, " STANDBY"); 522 else 523 tipc_tlv_sprintf(msg->rep, " DEFUNCT"); 524 525 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", 526 nla_get_u32(link[TIPC_NLA_LINK_MTU]), 527 nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); 528 529 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", 530 nla_get_u32(prop[TIPC_NLA_PROP_TOL]), 531 nla_get_u32(prop[TIPC_NLA_PROP_WIN])); 532 533 tipc_tlv_sprintf(msg->rep, 534 " RX packets:%u fragments:%u/%u bundles:%u/%u\n", 535 nla_get_u32(link[TIPC_NLA_LINK_RX]) - 536 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), 537 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), 538 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), 539 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), 540 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); 541 542 tipc_tlv_sprintf(msg->rep, 543 " TX packets:%u fragments:%u/%u bundles:%u/%u\n", 544 nla_get_u32(link[TIPC_NLA_LINK_TX]) - 545 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), 546 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), 547 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), 548 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), 549 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); 550 551 tipc_tlv_sprintf(msg->rep, 552 " TX profile sample:%u packets average:%u octets\n", 553 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), 554 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / 555 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); 556 557 tipc_tlv_sprintf(msg->rep, 558 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", 559 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), 560 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 561 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), 562 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 563 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), 564 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 565 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), 566 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 567 568 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", 569 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), 570 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 571 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), 572 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), 573 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), 574 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); 575 576 tipc_tlv_sprintf(msg->rep, 577 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", 578 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), 579 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), 580 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), 581 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), 582 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); 583 584 tipc_tlv_sprintf(msg->rep, 585 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", 586 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), 587 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), 588 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), 589 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), 590 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); 591 592 tipc_tlv_sprintf(msg->rep, 593 " Congestion link:%u Send queue max:%u avg:%u", 594 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), 595 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), 596 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); 597 598 return 0; 599 } 600 601 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, 602 struct nlattr **attrs) 603 { 604 struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; 605 struct tipc_link_info link_info; 606 int err; 607 608 if (!attrs[TIPC_NLA_LINK]) 609 return -EINVAL; 610 611 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], 612 NULL, NULL); 613 if (err) 614 return err; 615 616 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); 617 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); 618 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME], 619 TIPC_MAX_LINK_NAME); 620 621 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, 622 &link_info, sizeof(link_info)); 623 } 624 625 static int __tipc_add_link_prop(struct sk_buff *skb, 626 struct tipc_nl_compat_msg *msg, 627 struct tipc_link_config *lc) 628 { 629 switch (msg->cmd) { 630 case TIPC_CMD_SET_LINK_PRI: 631 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); 632 case TIPC_CMD_SET_LINK_TOL: 633 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); 634 case TIPC_CMD_SET_LINK_WINDOW: 635 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); 636 } 637 638 return -EINVAL; 639 } 640 641 static int tipc_nl_compat_media_set(struct sk_buff *skb, 642 struct tipc_nl_compat_msg *msg) 643 { 644 struct nlattr *prop; 645 struct nlattr *media; 646 struct tipc_link_config *lc; 647 648 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 649 650 media = nla_nest_start(skb, TIPC_NLA_MEDIA); 651 if (!media) 652 return -EMSGSIZE; 653 654 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) 655 return -EMSGSIZE; 656 657 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP); 658 if (!prop) 659 return -EMSGSIZE; 660 661 __tipc_add_link_prop(skb, msg, lc); 662 nla_nest_end(skb, prop); 663 nla_nest_end(skb, media); 664 665 return 0; 666 } 667 668 static int tipc_nl_compat_bearer_set(struct sk_buff *skb, 669 struct tipc_nl_compat_msg *msg) 670 { 671 struct nlattr *prop; 672 struct nlattr *bearer; 673 struct tipc_link_config *lc; 674 675 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 676 677 bearer = nla_nest_start(skb, TIPC_NLA_BEARER); 678 if (!bearer) 679 return -EMSGSIZE; 680 681 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) 682 return -EMSGSIZE; 683 684 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); 685 if (!prop) 686 return -EMSGSIZE; 687 688 __tipc_add_link_prop(skb, msg, lc); 689 nla_nest_end(skb, prop); 690 nla_nest_end(skb, bearer); 691 692 return 0; 693 } 694 695 static int __tipc_nl_compat_link_set(struct sk_buff *skb, 696 struct tipc_nl_compat_msg *msg) 697 { 698 struct nlattr *prop; 699 struct nlattr *link; 700 struct tipc_link_config *lc; 701 702 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 703 704 link = nla_nest_start(skb, TIPC_NLA_LINK); 705 if (!link) 706 return -EMSGSIZE; 707 708 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) 709 return -EMSGSIZE; 710 711 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP); 712 if (!prop) 713 return -EMSGSIZE; 714 715 __tipc_add_link_prop(skb, msg, lc); 716 nla_nest_end(skb, prop); 717 nla_nest_end(skb, link); 718 719 return 0; 720 } 721 722 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, 723 struct sk_buff *skb, 724 struct tipc_nl_compat_msg *msg) 725 { 726 struct tipc_link_config *lc; 727 struct tipc_bearer *bearer; 728 struct tipc_media *media; 729 730 lc = (struct tipc_link_config *)TLV_DATA(msg->req); 731 732 media = tipc_media_find(lc->name); 733 if (media) { 734 cmd->doit = &__tipc_nl_media_set; 735 return tipc_nl_compat_media_set(skb, msg); 736 } 737 738 bearer = tipc_bearer_find(msg->net, lc->name); 739 if (bearer) { 740 cmd->doit = &__tipc_nl_bearer_set; 741 return tipc_nl_compat_bearer_set(skb, msg); 742 } 743 744 return __tipc_nl_compat_link_set(skb, msg); 745 } 746 747 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, 748 struct sk_buff *skb, 749 struct tipc_nl_compat_msg *msg) 750 { 751 char *name; 752 struct nlattr *link; 753 754 name = (char *)TLV_DATA(msg->req); 755 756 link = nla_nest_start(skb, TIPC_NLA_LINK); 757 if (!link) 758 return -EMSGSIZE; 759 760 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) 761 return -EMSGSIZE; 762 763 nla_nest_end(skb, link); 764 765 return 0; 766 } 767 768 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) 769 { 770 int i; 771 u32 depth; 772 struct tipc_name_table_query *ntq; 773 static const char * const header[] = { 774 "Type ", 775 "Lower Upper ", 776 "Port Identity ", 777 "Publication Scope" 778 }; 779 780 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 781 782 depth = ntohl(ntq->depth); 783 784 if (depth > 4) 785 depth = 4; 786 for (i = 0; i < depth; i++) 787 tipc_tlv_sprintf(msg->rep, header[i]); 788 tipc_tlv_sprintf(msg->rep, "\n"); 789 790 return 0; 791 } 792 793 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, 794 struct nlattr **attrs) 795 { 796 char port_str[27]; 797 struct tipc_name_table_query *ntq; 798 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; 799 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 800 u32 node, depth, type, lowbound, upbound; 801 static const char * const scope_str[] = {"", " zone", " cluster", 802 " node"}; 803 int err; 804 805 if (!attrs[TIPC_NLA_NAME_TABLE]) 806 return -EINVAL; 807 808 err = nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX, 809 attrs[TIPC_NLA_NAME_TABLE], NULL, NULL); 810 if (err) 811 return err; 812 813 if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) 814 return -EINVAL; 815 816 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, 817 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, NULL); 818 if (err) 819 return err; 820 821 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); 822 823 depth = ntohl(ntq->depth); 824 type = ntohl(ntq->type); 825 lowbound = ntohl(ntq->lowbound); 826 upbound = ntohl(ntq->upbound); 827 828 if (!(depth & TIPC_NTQ_ALLTYPES) && 829 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) 830 return 0; 831 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) 832 return 0; 833 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) 834 return 0; 835 836 tipc_tlv_sprintf(msg->rep, "%-10u ", 837 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); 838 839 if (depth == 1) 840 goto out; 841 842 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", 843 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), 844 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); 845 846 if (depth == 2) 847 goto out; 848 849 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); 850 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), 851 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); 852 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); 853 854 if (depth == 3) 855 goto out; 856 857 tipc_tlv_sprintf(msg->rep, "%-10u %s", 858 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), 859 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); 860 out: 861 tipc_tlv_sprintf(msg->rep, "\n"); 862 863 return 0; 864 } 865 866 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, 867 struct nlattr **attrs) 868 { 869 u32 type, lower, upper; 870 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; 871 int err; 872 873 if (!attrs[TIPC_NLA_PUBL]) 874 return -EINVAL; 875 876 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], 877 NULL, NULL); 878 if (err) 879 return err; 880 881 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); 882 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); 883 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); 884 885 if (lower == upper) 886 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); 887 else 888 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); 889 890 return 0; 891 } 892 893 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) 894 { 895 int err; 896 void *hdr; 897 struct nlattr *nest; 898 struct sk_buff *args; 899 struct tipc_nl_compat_cmd_dump dump; 900 901 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 902 if (!args) 903 return -ENOMEM; 904 905 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, 906 TIPC_NL_PUBL_GET); 907 if (!hdr) 908 return -EMSGSIZE; 909 910 nest = nla_nest_start(args, TIPC_NLA_SOCK); 911 if (!nest) { 912 kfree_skb(args); 913 return -EMSGSIZE; 914 } 915 916 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { 917 kfree_skb(args); 918 return -EMSGSIZE; 919 } 920 921 nla_nest_end(args, nest); 922 genlmsg_end(args, hdr); 923 924 dump.dumpit = tipc_nl_publ_dump; 925 dump.format = __tipc_nl_compat_publ_dump; 926 927 err = __tipc_nl_compat_dumpit(&dump, msg, args); 928 929 kfree_skb(args); 930 931 return err; 932 } 933 934 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, 935 struct nlattr **attrs) 936 { 937 int err; 938 u32 sock_ref; 939 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; 940 941 if (!attrs[TIPC_NLA_SOCK]) 942 return -EINVAL; 943 944 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], 945 NULL, NULL); 946 if (err) 947 return err; 948 949 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); 950 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); 951 952 if (sock[TIPC_NLA_SOCK_CON]) { 953 u32 node; 954 struct nlattr *con[TIPC_NLA_CON_MAX + 1]; 955 956 err = nla_parse_nested(con, TIPC_NLA_CON_MAX, 957 sock[TIPC_NLA_SOCK_CON], NULL, NULL); 958 959 if (err) 960 return err; 961 962 node = nla_get_u32(con[TIPC_NLA_CON_NODE]); 963 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", 964 tipc_zone(node), 965 tipc_cluster(node), 966 tipc_node(node), 967 nla_get_u32(con[TIPC_NLA_CON_SOCK])); 968 969 if (con[TIPC_NLA_CON_FLAG]) 970 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", 971 nla_get_u32(con[TIPC_NLA_CON_TYPE]), 972 nla_get_u32(con[TIPC_NLA_CON_INST])); 973 else 974 tipc_tlv_sprintf(msg->rep, "\n"); 975 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { 976 tipc_tlv_sprintf(msg->rep, " bound to"); 977 978 err = tipc_nl_compat_publ_dump(msg, sock_ref); 979 if (err) 980 return err; 981 } 982 tipc_tlv_sprintf(msg->rep, "\n"); 983 984 return 0; 985 } 986 987 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, 988 struct nlattr **attrs) 989 { 990 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; 991 int err; 992 993 if (!attrs[TIPC_NLA_MEDIA]) 994 return -EINVAL; 995 996 err = nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, 997 attrs[TIPC_NLA_MEDIA], NULL, NULL); 998 if (err) 999 return err; 1000 1001 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, 1002 nla_data(media[TIPC_NLA_MEDIA_NAME]), 1003 nla_len(media[TIPC_NLA_MEDIA_NAME])); 1004 } 1005 1006 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, 1007 struct nlattr **attrs) 1008 { 1009 struct tipc_node_info node_info; 1010 struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; 1011 int err; 1012 1013 if (!attrs[TIPC_NLA_NODE]) 1014 return -EINVAL; 1015 1016 err = nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], 1017 NULL, NULL); 1018 if (err) 1019 return err; 1020 1021 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); 1022 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); 1023 1024 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, 1025 sizeof(node_info)); 1026 } 1027 1028 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, 1029 struct sk_buff *skb, 1030 struct tipc_nl_compat_msg *msg) 1031 { 1032 u32 val; 1033 struct nlattr *net; 1034 1035 val = ntohl(*(__be32 *)TLV_DATA(msg->req)); 1036 1037 net = nla_nest_start(skb, TIPC_NLA_NET); 1038 if (!net) 1039 return -EMSGSIZE; 1040 1041 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { 1042 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) 1043 return -EMSGSIZE; 1044 } else if (msg->cmd == TIPC_CMD_SET_NETID) { 1045 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) 1046 return -EMSGSIZE; 1047 } 1048 nla_nest_end(skb, net); 1049 1050 return 0; 1051 } 1052 1053 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, 1054 struct nlattr **attrs) 1055 { 1056 __be32 id; 1057 struct nlattr *net[TIPC_NLA_NET_MAX + 1]; 1058 int err; 1059 1060 if (!attrs[TIPC_NLA_NET]) 1061 return -EINVAL; 1062 1063 err = nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], 1064 NULL, NULL); 1065 if (err) 1066 return err; 1067 1068 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); 1069 1070 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); 1071 } 1072 1073 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) 1074 { 1075 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); 1076 if (!msg->rep) 1077 return -ENOMEM; 1078 1079 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); 1080 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); 1081 1082 return 0; 1083 } 1084 1085 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) 1086 { 1087 struct tipc_nl_compat_cmd_dump dump; 1088 struct tipc_nl_compat_cmd_doit doit; 1089 1090 memset(&dump, 0, sizeof(dump)); 1091 memset(&doit, 0, sizeof(doit)); 1092 1093 switch (msg->cmd) { 1094 case TIPC_CMD_NOOP: 1095 msg->rep = tipc_tlv_alloc(0); 1096 if (!msg->rep) 1097 return -ENOMEM; 1098 return 0; 1099 case TIPC_CMD_GET_BEARER_NAMES: 1100 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); 1101 dump.dumpit = tipc_nl_bearer_dump; 1102 dump.format = tipc_nl_compat_bearer_dump; 1103 return tipc_nl_compat_dumpit(&dump, msg); 1104 case TIPC_CMD_ENABLE_BEARER: 1105 msg->req_type = TIPC_TLV_BEARER_CONFIG; 1106 doit.doit = __tipc_nl_bearer_enable; 1107 doit.transcode = tipc_nl_compat_bearer_enable; 1108 return tipc_nl_compat_doit(&doit, msg); 1109 case TIPC_CMD_DISABLE_BEARER: 1110 msg->req_type = TIPC_TLV_BEARER_NAME; 1111 doit.doit = __tipc_nl_bearer_disable; 1112 doit.transcode = tipc_nl_compat_bearer_disable; 1113 return tipc_nl_compat_doit(&doit, msg); 1114 case TIPC_CMD_SHOW_LINK_STATS: 1115 msg->req_type = TIPC_TLV_LINK_NAME; 1116 msg->rep_size = ULTRA_STRING_MAX_LEN; 1117 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1118 dump.dumpit = tipc_nl_node_dump_link; 1119 dump.format = tipc_nl_compat_link_stat_dump; 1120 return tipc_nl_compat_dumpit(&dump, msg); 1121 case TIPC_CMD_GET_LINKS: 1122 msg->req_type = TIPC_TLV_NET_ADDR; 1123 msg->rep_size = ULTRA_STRING_MAX_LEN; 1124 dump.dumpit = tipc_nl_node_dump_link; 1125 dump.format = tipc_nl_compat_link_dump; 1126 return tipc_nl_compat_dumpit(&dump, msg); 1127 case TIPC_CMD_SET_LINK_TOL: 1128 case TIPC_CMD_SET_LINK_PRI: 1129 case TIPC_CMD_SET_LINK_WINDOW: 1130 msg->req_type = TIPC_TLV_LINK_CONFIG; 1131 doit.doit = tipc_nl_node_set_link; 1132 doit.transcode = tipc_nl_compat_link_set; 1133 return tipc_nl_compat_doit(&doit, msg); 1134 case TIPC_CMD_RESET_LINK_STATS: 1135 msg->req_type = TIPC_TLV_LINK_NAME; 1136 doit.doit = tipc_nl_node_reset_link_stats; 1137 doit.transcode = tipc_nl_compat_link_reset_stats; 1138 return tipc_nl_compat_doit(&doit, msg); 1139 case TIPC_CMD_SHOW_NAME_TABLE: 1140 msg->req_type = TIPC_TLV_NAME_TBL_QUERY; 1141 msg->rep_size = ULTRA_STRING_MAX_LEN; 1142 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1143 dump.header = tipc_nl_compat_name_table_dump_header; 1144 dump.dumpit = tipc_nl_name_table_dump; 1145 dump.format = tipc_nl_compat_name_table_dump; 1146 return tipc_nl_compat_dumpit(&dump, msg); 1147 case TIPC_CMD_SHOW_PORTS: 1148 msg->rep_size = ULTRA_STRING_MAX_LEN; 1149 msg->rep_type = TIPC_TLV_ULTRA_STRING; 1150 dump.dumpit = tipc_nl_sk_dump; 1151 dump.format = tipc_nl_compat_sk_dump; 1152 return tipc_nl_compat_dumpit(&dump, msg); 1153 case TIPC_CMD_GET_MEDIA_NAMES: 1154 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); 1155 dump.dumpit = tipc_nl_media_dump; 1156 dump.format = tipc_nl_compat_media_dump; 1157 return tipc_nl_compat_dumpit(&dump, msg); 1158 case TIPC_CMD_GET_NODES: 1159 msg->rep_size = ULTRA_STRING_MAX_LEN; 1160 dump.dumpit = tipc_nl_node_dump; 1161 dump.format = tipc_nl_compat_node_dump; 1162 return tipc_nl_compat_dumpit(&dump, msg); 1163 case TIPC_CMD_SET_NODE_ADDR: 1164 msg->req_type = TIPC_TLV_NET_ADDR; 1165 doit.doit = __tipc_nl_net_set; 1166 doit.transcode = tipc_nl_compat_net_set; 1167 return tipc_nl_compat_doit(&doit, msg); 1168 case TIPC_CMD_SET_NETID: 1169 msg->req_type = TIPC_TLV_UNSIGNED; 1170 doit.doit = __tipc_nl_net_set; 1171 doit.transcode = tipc_nl_compat_net_set; 1172 return tipc_nl_compat_doit(&doit, msg); 1173 case TIPC_CMD_GET_NETID: 1174 msg->rep_size = sizeof(u32); 1175 dump.dumpit = tipc_nl_net_dump; 1176 dump.format = tipc_nl_compat_net_dump; 1177 return tipc_nl_compat_dumpit(&dump, msg); 1178 case TIPC_CMD_SHOW_STATS: 1179 return tipc_cmd_show_stats_compat(msg); 1180 } 1181 1182 return -EOPNOTSUPP; 1183 } 1184 1185 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) 1186 { 1187 int err; 1188 int len; 1189 struct tipc_nl_compat_msg msg; 1190 struct nlmsghdr *req_nlh; 1191 struct nlmsghdr *rep_nlh; 1192 struct tipc_genlmsghdr *req_userhdr = info->userhdr; 1193 1194 memset(&msg, 0, sizeof(msg)); 1195 1196 req_nlh = (struct nlmsghdr *)skb->data; 1197 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; 1198 msg.cmd = req_userhdr->cmd; 1199 msg.net = genl_info_net(info); 1200 msg.dst_sk = skb->sk; 1201 1202 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { 1203 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); 1204 err = -EACCES; 1205 goto send; 1206 } 1207 1208 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); 1209 if (len && !TLV_OK(msg.req, len)) { 1210 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1211 err = -EOPNOTSUPP; 1212 goto send; 1213 } 1214 1215 err = tipc_nl_compat_handle(&msg); 1216 if ((err == -EOPNOTSUPP) || (err == -EPERM)) 1217 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); 1218 else if (err == -EINVAL) 1219 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); 1220 send: 1221 if (!msg.rep) 1222 return err; 1223 1224 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); 1225 skb_push(msg.rep, len); 1226 rep_nlh = nlmsg_hdr(msg.rep); 1227 memcpy(rep_nlh, info->nlhdr, len); 1228 rep_nlh->nlmsg_len = msg.rep->len; 1229 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); 1230 1231 return err; 1232 } 1233 1234 static const struct genl_ops tipc_genl_compat_ops[] = { 1235 { 1236 .cmd = TIPC_GENL_CMD, 1237 .doit = tipc_nl_compat_recv, 1238 }, 1239 }; 1240 1241 static struct genl_family tipc_genl_compat_family __ro_after_init = { 1242 .name = TIPC_GENL_NAME, 1243 .version = TIPC_GENL_VERSION, 1244 .hdrsize = TIPC_GENL_HDRLEN, 1245 .maxattr = 0, 1246 .netnsok = true, 1247 .module = THIS_MODULE, 1248 .ops = tipc_genl_compat_ops, 1249 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops), 1250 }; 1251 1252 int __init tipc_netlink_compat_start(void) 1253 { 1254 int res; 1255 1256 res = genl_register_family(&tipc_genl_compat_family); 1257 if (res) { 1258 pr_err("Failed to register legacy compat interface\n"); 1259 return res; 1260 } 1261 1262 return 0; 1263 } 1264 1265 void tipc_netlink_compat_stop(void) 1266 { 1267 genl_unregister_family(&tipc_genl_compat_family); 1268 } 1269