net/tipc/netlink_compat.c

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