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