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