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         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 }