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 "config.h"
  36 #include "bearer.h"
  37 #include "link.h"
  38 #include "name_table.h"
  39 #include "socket.h"
  40 #include "node.h"
  41 #include "net.h"
  42 #include <net/genetlink.h>
  43 #include <linux/tipc_config.h>
  44
  45 /* The legacy API had an artificial message length limit called
  46  * ULTRA_STRING_MAX_LEN.
  47  */
  48 #define ULTRA_STRING_MAX_LEN 32768
  49
  50 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
  51
  52 #define REPLY_TRUNCATED "<truncated>\n"
  53
  54 struct tipc_nl_compat_msg {
  55         u16 cmd;
  56         int rep_type;
  57         int rep_size;
  58         int req_type;
  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 sk_buff *skb, struct tipc_nl_compat_msg *msg);
  73 };
  74
  75 static int tipc_skb_tailroom(struct sk_buff *skb)
  76 {
  77         int tailroom;
  78         int limit;
  79
  80         tailroom = skb_tailroom(skb);
  81         limit = TIPC_SKB_MAX - skb->len;
  82
  83         if (tailroom < limit)
  84                 return tailroom;
  85
  86         return limit;
  87 }
  88
  89 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
  90 {
  91         struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
  92
  93         if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
  94                 return -EMSGSIZE;
  95
  96         skb_put(skb, TLV_SPACE(len));
  97         tlv->tlv_type = htons(type);
  98         tlv->tlv_len = htons(TLV_LENGTH(len));
  99         if (len && data)
 100                 memcpy(TLV_DATA(tlv), data, len);
 101
 102         return 0;
 103 }
 104
 105 static void tipc_tlv_init(struct sk_buff *skb, u16 type)
 106 {
 107         struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
 108
 109         TLV_SET_LEN(tlv, 0);
 110         TLV_SET_TYPE(tlv, type);
 111         skb_put(skb, sizeof(struct tlv_desc));
 112 }
 113
 114 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
 115 {
 116         int n;
 117         u16 len;
 118         u32 rem;
 119         char *buf;
 120         struct tlv_desc *tlv;
 121         va_list args;
 122
 123         rem = tipc_skb_tailroom(skb);
 124
 125         tlv = (struct tlv_desc *)skb->data;
 126         len = TLV_GET_LEN(tlv);
 127         buf = TLV_DATA(tlv) + len;
 128
 129         va_start(args, fmt);
 130         n = vscnprintf(buf, rem, fmt, args);
 131         va_end(args);
 132
 133         TLV_SET_LEN(tlv, n + len);
 134         skb_put(skb, n);
 135
 136         return n;
 137 }
 138
 139 static struct sk_buff *tipc_tlv_alloc(int size)
 140 {
 141         int hdr_len;
 142         struct sk_buff *buf;
 143
 144         size = TLV_SPACE(size);
 145         hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
 146
 147         buf = alloc_skb(hdr_len + size, GFP_KERNEL);
 148         if (!buf)
 149                 return NULL;
 150
 151         skb_reserve(buf, hdr_len);
 152
 153         return buf;
 154 }
 155
 156 static struct sk_buff *tipc_get_err_tlv(char *str)
 157 {
 158         int str_len = strlen(str) + 1;
 159         struct sk_buff *buf;
 160
 161         buf = tipc_tlv_alloc(TLV_SPACE(str_len));
 162         if (buf)
 163                 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
 164
 165         return buf;
 166 }
 167
 168 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
 169                                    struct tipc_nl_compat_msg *msg,
 170                                    struct sk_buff *arg)
 171 {
 172         int len = 0;
 173         int err;
 174         struct sk_buff *buf;
 175         struct nlmsghdr *nlmsg;
 176         struct netlink_callback cb;
 177
 178         memset(&cb, 0, sizeof(cb));
 179         cb.nlh = (struct nlmsghdr *)arg->data;
 180         cb.skb = arg;
 181
 182         buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 183         if (!buf)
 184                 return -ENOMEM;
 185
 186         buf->sk = msg->dst_sk;
 187
 188         do {
 189                 int rem;
 190
 191                 len = (*cmd->dumpit)(buf, &cb);
 192
 193                 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
 194                         struct nlattr **attrs;
 195
 196                         err = tipc_nlmsg_parse(nlmsg, &attrs);
 197                         if (err)
 198                                 goto err_out;
 199
 200                         err = (*cmd->format)(msg, attrs);
 201                         if (err)
 202                                 goto err_out;
 203
 204                         if (tipc_skb_tailroom(msg->rep) <= 1) {
 205                                 err = -EMSGSIZE;
 206                                 goto err_out;
 207                         }
 208                 }
 209
 210                 skb_reset_tail_pointer(buf);
 211                 buf->len = 0;
 212
 213         } while (len);
 214
 215         err = 0;
 216
 217 err_out:
 218         kfree_skb(buf);
 219
 220         if (err == -EMSGSIZE) {
 221                 /* The legacy API only considered messages filling
 222                  * "ULTRA_STRING_MAX_LEN" to be truncated.
 223                  */
 224                 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
 225                         char *tail = skb_tail_pointer(msg->rep);
 226
 227                         if (*tail != '\0')
 228                                 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
 229                                         REPLY_TRUNCATED);
 230                 }
 231
 232                 return 0;
 233         }
 234
 235         return err;
 236 }
 237
 238 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
 239                                  struct tipc_nl_compat_msg *msg)
 240 {
 241         int err;
 242         struct sk_buff *arg;
 243
 244         if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
 245                 return -EINVAL;
 246
 247         msg->rep = tipc_tlv_alloc(msg->rep_size);
 248         if (!msg->rep)
 249                 return -ENOMEM;
 250
 251         if (msg->rep_type)
 252                 tipc_tlv_init(msg->rep, msg->rep_type);
 253
 254         if (cmd->header)
 255                 (*cmd->header)(msg);
 256
 257         arg = nlmsg_new(0, GFP_KERNEL);
 258         if (!arg) {
 259                 kfree_skb(msg->rep);
 260                 return -ENOMEM;
 261         }
 262
 263         err = __tipc_nl_compat_dumpit(cmd, msg, arg);
 264         if (err)
 265                 kfree_skb(msg->rep);
 266
 267         kfree_skb(arg);
 268
 269         return err;
 270 }
 271
 272 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 273                                  struct tipc_nl_compat_msg *msg)
 274 {
 275         int err;
 276         struct sk_buff *doit_buf;
 277         struct sk_buff *trans_buf;
 278         struct nlattr **attrbuf;
 279         struct genl_info info;
 280
 281         trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 282         if (!trans_buf)
 283                 return -ENOMEM;
 284
 285         err = (*cmd->transcode)(trans_buf, msg);
 286         if (err)
 287                 goto trans_out;
 288
 289         attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
 290                         sizeof(struct nlattr *), GFP_KERNEL);
 291         if (!attrbuf) {
 292                 err = -ENOMEM;
 293                 goto trans_out;
 294         }
 295
 296         err = nla_parse(attrbuf, tipc_genl_family.maxattr,
 297                         (const struct nlattr *)trans_buf->data,
 298                         trans_buf->len, NULL);
 299         if (err)
 300                 goto parse_out;
 301
 302         doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 303         if (!doit_buf) {
 304                 err = -ENOMEM;
 305                 goto parse_out;
 306         }
 307
 308         doit_buf->sk = msg->dst_sk;
 309
 310         memset(&info, 0, sizeof(info));
 311         info.attrs = attrbuf;
 312
 313         err = (*cmd->doit)(doit_buf, &info);
 314
 315         kfree_skb(doit_buf);
 316 parse_out:
 317         kfree(attrbuf);
 318 trans_out:
 319         kfree_skb(trans_buf);
 320
 321         return err;
 322 }
 323
 324 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 325                                struct tipc_nl_compat_msg *msg)
 326 {
 327         int err;
 328
 329         if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
 330                 return -EINVAL;
 331
 332         err = __tipc_nl_compat_doit(cmd, msg);
 333         if (err)
 334                 return err;
 335
 336         /* The legacy API considered an empty message a success message */
 337         msg->rep = tipc_tlv_alloc(0);
 338         if (!msg->rep)
 339                 return -ENOMEM;
 340
 341         return 0;
 342 }
 343
 344 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
 345                                       struct nlattr **attrs)
 346 {
 347         struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
 348
 349         nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER],
 350                          NULL);
 351
 352         return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
 353                             nla_data(bearer[TIPC_NLA_BEARER_NAME]),
 354                             nla_len(bearer[TIPC_NLA_BEARER_NAME]));
 355 }
 356
 357 static int tipc_nl_compat_bearer_enable(struct sk_buff *skb,
 358                                         struct tipc_nl_compat_msg *msg)
 359 {
 360         struct nlattr *prop;
 361         struct nlattr *bearer;
 362         struct tipc_bearer_config *b;
 363
 364         b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
 365
 366         bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
 367         if (!bearer)
 368                 return -EMSGSIZE;
 369
 370         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
 371                 return -EMSGSIZE;
 372
 373         if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
 374                 return -EMSGSIZE;
 375
 376         if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
 377                 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
 378                 if (!prop)
 379                         return -EMSGSIZE;
 380                 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
 381                         return -EMSGSIZE;
 382                 nla_nest_end(skb, prop);
 383         }
 384         nla_nest_end(skb, bearer);
 385
 386         return 0;
 387 }
 388
 389 static int tipc_nl_compat_bearer_disable(struct sk_buff *skb,
 390                                          struct tipc_nl_compat_msg *msg)
 391 {
 392         char *name;
 393         struct nlattr *bearer;
 394
 395         name = (char *)TLV_DATA(msg->req);
 396
 397         bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
 398         if (!bearer)
 399                 return -EMSGSIZE;
 400
 401         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
 402                 return -EMSGSIZE;
 403
 404         nla_nest_end(skb, bearer);
 405
 406         return 0;
 407 }
 408
 409 static inline u32 perc(u32 count, u32 total)
 410 {
 411         return (count * 100 + (total / 2)) / total;
 412 }
 413
 414 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
 415                                 struct nlattr *prop[], struct nlattr *stats[])
 416 {
 417         tipc_tlv_sprintf(msg->rep, "  Window:%u packets\n",
 418                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
 419
 420         tipc_tlv_sprintf(msg->rep,
 421                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
 422                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
 423                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
 424                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
 425                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
 426                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
 427
 428         tipc_tlv_sprintf(msg->rep,
 429                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
 430                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
 431                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
 432                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
 433                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
 434                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
 435
 436         tipc_tlv_sprintf(msg->rep, "  RX naks:%u defs:%u dups:%u\n",
 437                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
 438                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
 439                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
 440
 441         tipc_tlv_sprintf(msg->rep, "  TX naks:%u acks:%u dups:%u\n",
 442                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
 443                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
 444                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
 445
 446         tipc_tlv_sprintf(msg->rep,
 447                          "  Congestion link:%u  Send queue max:%u avg:%u",
 448                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
 449                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
 450                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
 451 }
 452
 453 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
 454                                          struct nlattr **attrs)
 455 {
 456         char *name;
 457         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
 458         struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
 459         struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
 460
 461         nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
 462
 463         nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP],
 464                          NULL);
 465
 466         nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS],
 467                          NULL);
 468
 469         name = (char *)TLV_DATA(msg->req);
 470         if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
 471                 return 0;
 472
 473         tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
 474                          nla_data(link[TIPC_NLA_LINK_NAME]));
 475
 476         if (link[TIPC_NLA_LINK_BROADCAST]) {
 477                 __fill_bc_link_stat(msg, prop, stats);
 478                 return 0;
 479         }
 480
 481         if (link[TIPC_NLA_LINK_ACTIVE])
 482                 tipc_tlv_sprintf(msg->rep, "  ACTIVE");
 483         else if (link[TIPC_NLA_LINK_UP])
 484                 tipc_tlv_sprintf(msg->rep, "  STANDBY");
 485         else
 486                 tipc_tlv_sprintf(msg->rep, "  DEFUNCT");
 487
 488         tipc_tlv_sprintf(msg->rep, "  MTU:%u  Priority:%u",
 489                          nla_get_u32(link[TIPC_NLA_LINK_MTU]),
 490                          nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
 491
 492         tipc_tlv_sprintf(msg->rep, "  Tolerance:%u ms  Window:%u packets\n",
 493                          nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
 494                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
 495
 496         tipc_tlv_sprintf(msg->rep,
 497                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
 498                          nla_get_u32(link[TIPC_NLA_LINK_RX]) -
 499                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
 500                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
 501                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
 502                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
 503                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
 504
 505         tipc_tlv_sprintf(msg->rep,
 506                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
 507                          nla_get_u32(link[TIPC_NLA_LINK_TX]) -
 508                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
 509                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
 510                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
 511                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
 512                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
 513
 514         tipc_tlv_sprintf(msg->rep,
 515                          "  TX profile sample:%u packets  average:%u octets\n",
 516                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
 517                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
 518                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
 519
 520         tipc_tlv_sprintf(msg->rep,
 521                          "  0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
 522                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
 523                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 524                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
 525                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 526                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
 527                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 528                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
 529                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
 530
 531         tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
 532                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
 533                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 534                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
 535                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 536                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
 537                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
 538
 539         tipc_tlv_sprintf(msg->rep,
 540                          "  RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
 541                          nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
 542                          nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
 543                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
 544                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
 545                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
 546
 547         tipc_tlv_sprintf(msg->rep,
 548                          "  TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
 549                          nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
 550                          nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
 551                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
 552                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
 553                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
 554
 555         tipc_tlv_sprintf(msg->rep,
 556                          "  Congestion link:%u  Send queue max:%u avg:%u",
 557                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
 558                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
 559                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
 560
 561         return 0;
 562 }
 563
 564 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
 565                                     struct nlattr **attrs)
 566 {
 567         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
 568         struct tipc_link_info link_info;
 569
 570         nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
 571
 572         link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
 573         link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
 574         strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]));
 575
 576         return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
 577                             &link_info, sizeof(link_info));
 578 }
 579
 580 static int tipc_nl_compat_link_set(struct sk_buff *skb,
 581                                    struct tipc_nl_compat_msg *msg)
 582 {
 583         struct nlattr *link;
 584         struct nlattr *prop;
 585         struct tipc_link_config *lc;
 586
 587         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 588
 589         link = nla_nest_start(skb, TIPC_NLA_LINK);
 590         if (!link)
 591                 return -EMSGSIZE;
 592
 593         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
 594                 return -EMSGSIZE;
 595
 596         prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
 597         if (!prop)
 598                 return -EMSGSIZE;
 599
 600         if (msg->cmd == TIPC_CMD_SET_LINK_PRI) {
 601                 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)))
 602                         return -EMSGSIZE;
 603         } else if (msg->cmd == TIPC_CMD_SET_LINK_TOL) {
 604                 if (nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)))
 605                         return -EMSGSIZE;
 606         } else if (msg->cmd == TIPC_CMD_SET_LINK_WINDOW) {
 607                 if (nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)))
 608                         return -EMSGSIZE;
 609         }
 610
 611         nla_nest_end(skb, prop);
 612         nla_nest_end(skb, link);
 613
 614         return 0;
 615 }
 616
 617 static int tipc_nl_compat_link_reset_stats(struct sk_buff *skb,
 618                                            struct tipc_nl_compat_msg *msg)
 619 {
 620         char *name;
 621         struct nlattr *link;
 622
 623         name = (char *)TLV_DATA(msg->req);
 624
 625         link = nla_nest_start(skb, TIPC_NLA_LINK);
 626         if (!link)
 627                 return -EMSGSIZE;
 628
 629         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
 630                 return -EMSGSIZE;
 631
 632         nla_nest_end(skb, link);
 633
 634         return 0;
 635 }
 636
 637 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
 638 {
 639         int i;
 640         u32 depth;
 641         struct tipc_name_table_query *ntq;
 642         static const char * const header[] = {
 643                 "Type       ",
 644                 "Lower      Upper      ",
 645                 "Port Identity              ",
 646                 "Publication Scope"
 647         };
 648
 649         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
 650
 651         depth = ntohl(ntq->depth);
 652
 653         if (depth > 4)
 654                 depth = 4;
 655         for (i = 0; i < depth; i++)
 656                 tipc_tlv_sprintf(msg->rep, header[i]);
 657         tipc_tlv_sprintf(msg->rep, "\n");
 658
 659         return 0;
 660 }
 661
 662 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
 663                                           struct nlattr **attrs)
 664 {
 665         char port_str[27];
 666         struct tipc_name_table_query *ntq;
 667         struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
 668         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
 669         u32 node, depth, type, lowbound, upbound;
 670         static const char * const scope_str[] = {"", " zone", " cluster",
 671                                                  " node"};
 672
 673         nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
 674                          attrs[TIPC_NLA_NAME_TABLE], NULL);
 675
 676         nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL],
 677                          NULL);
 678
 679         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
 680
 681         depth = ntohl(ntq->depth);
 682         type = ntohl(ntq->type);
 683         lowbound = ntohl(ntq->lowbound);
 684         upbound = ntohl(ntq->upbound);
 685
 686         if (!(depth & TIPC_NTQ_ALLTYPES) &&
 687             (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
 688                 return 0;
 689         if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
 690                 return 0;
 691         if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
 692                 return 0;
 693
 694         tipc_tlv_sprintf(msg->rep, "%-10u ",
 695                          nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
 696
 697         if (depth == 1)
 698                 goto out;
 699
 700         tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
 701                          nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
 702                          nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
 703
 704         if (depth == 2)
 705                 goto out;
 706
 707         node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
 708         sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
 709                 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
 710         tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
 711
 712         if (depth == 3)
 713                 goto out;
 714
 715         tipc_tlv_sprintf(msg->rep, "%-10u %s",
 716                          nla_get_u32(publ[TIPC_NLA_PUBL_REF]),
 717                          scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
 718 out:
 719         tipc_tlv_sprintf(msg->rep, "\n");
 720
 721         return 0;
 722 }
 723
 724 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
 725                                       struct nlattr **attrs)
 726 {
 727         u32 type, lower, upper;
 728         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
 729
 730         nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL);
 731
 732         type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
 733         lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
 734         upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
 735
 736         if (lower == upper)
 737                 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
 738         else
 739                 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
 740
 741         return 0;
 742 }
 743
 744 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
 745 {
 746         int err;
 747         void *hdr;
 748         struct nlattr *nest;
 749         struct sk_buff *args;
 750         struct tipc_nl_compat_cmd_dump dump;
 751
 752         args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 753         if (!args)
 754                 return -ENOMEM;
 755
 756         hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
 757                           TIPC_NL_PUBL_GET);
 758
 759         nest = nla_nest_start(args, TIPC_NLA_SOCK);
 760         if (!nest) {
 761                 kfree_skb(args);
 762                 return -EMSGSIZE;
 763         }
 764
 765         if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
 766                 kfree_skb(args);
 767                 return -EMSGSIZE;
 768         }
 769
 770         nla_nest_end(args, nest);
 771         genlmsg_end(args, hdr);
 772
 773         dump.dumpit = tipc_nl_publ_dump;
 774         dump.format = __tipc_nl_compat_publ_dump;
 775
 776         err = __tipc_nl_compat_dumpit(&dump, msg, args);
 777
 778         kfree_skb(args);
 779
 780         return err;
 781 }
 782
 783 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
 784                                   struct nlattr **attrs)
 785 {
 786         int err;
 787         u32 sock_ref;
 788         struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
 789
 790         nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL);
 791
 792         sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
 793         tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
 794
 795         if (sock[TIPC_NLA_SOCK_CON]) {
 796                 u32 node;
 797                 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
 798
 799                 nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON],
 800                                  NULL);
 801
 802                 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
 803                 tipc_tlv_sprintf(msg->rep, "  connected to <%u.%u.%u:%u>",
 804                                  tipc_zone(node),
 805                                  tipc_cluster(node),
 806                                  tipc_node(node),
 807                                  nla_get_u32(con[TIPC_NLA_CON_SOCK]));
 808
 809                 if (con[TIPC_NLA_CON_FLAG])
 810                         tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
 811                                          nla_get_u32(con[TIPC_NLA_CON_TYPE]),
 812                                          nla_get_u32(con[TIPC_NLA_CON_INST]));
 813                 else
 814                         tipc_tlv_sprintf(msg->rep, "\n");
 815         } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
 816                 tipc_tlv_sprintf(msg->rep, " bound to");
 817
 818                 err = tipc_nl_compat_publ_dump(msg, sock_ref);
 819                 if (err)
 820                         return err;
 821         }
 822         tipc_tlv_sprintf(msg->rep, "\n");
 823
 824         return 0;
 825 }
 826
 827 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
 828                                      struct nlattr **attrs)
 829 {
 830         struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
 831
 832         nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA],
 833                          NULL);
 834
 835         return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
 836                             nla_data(media[TIPC_NLA_MEDIA_NAME]),
 837                             nla_len(media[TIPC_NLA_MEDIA_NAME]));
 838 }
 839
 840 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
 841                                     struct nlattr **attrs)
 842 {
 843         struct tipc_node_info node_info;
 844         struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
 845
 846         nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL);
 847
 848         node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
 849         node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
 850
 851         return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
 852                             sizeof(node_info));
 853 }
 854
 855 static int tipc_nl_compat_net_set(struct sk_buff *skb,
 856                                   struct tipc_nl_compat_msg *msg)
 857 {
 858         u32 val;
 859         struct nlattr *net;
 860
 861         val = ntohl(*(__be32 *)TLV_DATA(msg->req));
 862
 863         net = nla_nest_start(skb, TIPC_NLA_NET);
 864         if (!net)
 865                 return -EMSGSIZE;
 866
 867         if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
 868                 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
 869                         return -EMSGSIZE;
 870         } else if (msg->cmd == TIPC_CMD_SET_NETID) {
 871                 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
 872                         return -EMSGSIZE;
 873         }
 874         nla_nest_end(skb, net);
 875
 876         return 0;
 877 }
 878
 879 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
 880 {
 881         struct tipc_nl_compat_cmd_dump dump;
 882         struct tipc_nl_compat_cmd_doit doit;
 883
 884         memset(&dump, 0, sizeof(dump));
 885         memset(&doit, 0, sizeof(doit));
 886
 887         switch (msg->cmd) {
 888         case TIPC_CMD_GET_BEARER_NAMES:
 889                 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
 890                 dump.dumpit = tipc_nl_bearer_dump;
 891                 dump.format = tipc_nl_compat_bearer_dump;
 892                 return tipc_nl_compat_dumpit(&dump, msg);
 893         case TIPC_CMD_ENABLE_BEARER:
 894                 msg->req_type = TIPC_TLV_BEARER_CONFIG;
 895                 doit.doit = tipc_nl_bearer_enable;
 896                 doit.transcode = tipc_nl_compat_bearer_enable;
 897                 return tipc_nl_compat_doit(&doit, msg);
 898         case TIPC_CMD_DISABLE_BEARER:
 899                 msg->req_type = TIPC_TLV_BEARER_NAME;
 900                 doit.doit = tipc_nl_bearer_disable;
 901                 doit.transcode = tipc_nl_compat_bearer_disable;
 902                 return tipc_nl_compat_doit(&doit, msg);
 903         case TIPC_CMD_SHOW_LINK_STATS:
 904                 msg->req_type = TIPC_TLV_LINK_NAME;
 905                 msg->rep_size = ULTRA_STRING_MAX_LEN;
 906                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
 907                 dump.dumpit = tipc_nl_link_dump;
 908                 dump.format = tipc_nl_compat_link_stat_dump;
 909                 return tipc_nl_compat_dumpit(&dump, msg);
 910         case TIPC_CMD_GET_LINKS:
 911                 msg->req_type = TIPC_TLV_NET_ADDR;
 912                 msg->rep_size = ULTRA_STRING_MAX_LEN;
 913                 dump.dumpit = tipc_nl_link_dump;
 914                 dump.format = tipc_nl_compat_link_dump;
 915                 return tipc_nl_compat_dumpit(&dump, msg);
 916         case TIPC_CMD_SET_LINK_TOL:
 917         case TIPC_CMD_SET_LINK_PRI:
 918         case TIPC_CMD_SET_LINK_WINDOW:
 919                 msg->req_type =  TIPC_TLV_LINK_CONFIG;
 920                 doit.doit = tipc_nl_link_set;
 921                 doit.transcode = tipc_nl_compat_link_set;
 922                 return tipc_nl_compat_doit(&doit, msg);
 923         case TIPC_CMD_RESET_LINK_STATS:
 924                 msg->req_type = TIPC_TLV_LINK_NAME;
 925                 doit.doit = tipc_nl_link_reset_stats;
 926                 doit.transcode = tipc_nl_compat_link_reset_stats;
 927                 return tipc_nl_compat_doit(&doit, msg);
 928         case TIPC_CMD_SHOW_NAME_TABLE:
 929                 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
 930                 msg->rep_size = ULTRA_STRING_MAX_LEN;
 931                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
 932                 dump.header = tipc_nl_compat_name_table_dump_header;
 933                 dump.dumpit = tipc_nl_name_table_dump;
 934                 dump.format = tipc_nl_compat_name_table_dump;
 935                 return tipc_nl_compat_dumpit(&dump, msg);
 936         case TIPC_CMD_SHOW_PORTS:
 937                 msg->rep_size = ULTRA_STRING_MAX_LEN;
 938                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
 939                 dump.dumpit = tipc_nl_sk_dump;
 940                 dump.format = tipc_nl_compat_sk_dump;
 941                 return tipc_nl_compat_dumpit(&dump, msg);
 942         case TIPC_CMD_GET_MEDIA_NAMES:
 943                 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
 944                 dump.dumpit = tipc_nl_media_dump;
 945                 dump.format = tipc_nl_compat_media_dump;
 946                 return tipc_nl_compat_dumpit(&dump, msg);
 947         case TIPC_CMD_GET_NODES:
 948                 msg->rep_size = ULTRA_STRING_MAX_LEN;
 949                 dump.dumpit = tipc_nl_node_dump;
 950                 dump.format = tipc_nl_compat_node_dump;
 951                 return tipc_nl_compat_dumpit(&dump, msg);
 952         case TIPC_CMD_SET_NODE_ADDR:
 953                 msg->req_type = TIPC_TLV_NET_ADDR;
 954                 doit.doit = tipc_nl_net_set;
 955                 doit.transcode = tipc_nl_compat_net_set;
 956                 return tipc_nl_compat_doit(&doit, msg);
 957         case TIPC_CMD_SET_NETID:
 958                 msg->req_type = TIPC_TLV_UNSIGNED;
 959                 doit.doit = tipc_nl_net_set;
 960                 doit.transcode = tipc_nl_compat_net_set;
 961                 return tipc_nl_compat_doit(&doit, msg);
 962         }
 963
 964         return -EOPNOTSUPP;
 965 }
 966
 967 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
 968 {
 969         int err;
 970         int len;
 971         struct tipc_nl_compat_msg msg;
 972         struct nlmsghdr *req_nlh;
 973         struct nlmsghdr *rep_nlh;
 974         struct tipc_genlmsghdr *req_userhdr = info->userhdr;
 975         struct net *net = genl_info_net(info);
 976
 977         memset(&msg, 0, sizeof(msg));
 978
 979         req_nlh = (struct nlmsghdr *)skb->data;
 980         msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
 981         msg.cmd = req_userhdr->cmd;
 982         msg.dst_sk = info->dst_sk;
 983
 984         if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
 985                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
 986                 err = -EACCES;
 987                 goto send;
 988         }
 989
 990         len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
 991         if (TLV_GET_LEN(msg.req) && !TLV_OK(msg.req, len)) {
 992                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
 993                 err = -EOPNOTSUPP;
 994                 goto send;
 995         }
 996
 997         err = tipc_nl_compat_handle(&msg);
 998         if (err == -EOPNOTSUPP)
 999                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1000         else if (err == -EINVAL)
1001                 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1002 send:
1003         if (!msg.rep)
1004                 return err;
1005
1006         len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1007         skb_push(msg.rep, len);
1008         rep_nlh = nlmsg_hdr(msg.rep);
1009         memcpy(rep_nlh, info->nlhdr, len);
1010         rep_nlh->nlmsg_len = msg.rep->len;
1011         genlmsg_unicast(net, msg.rep, NETLINK_CB(skb).portid);
1012
1013         return err;
1014 }
1015
1016 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
1017 {
1018         struct net *net = genl_info_net(info);
1019         struct sk_buff *rep_buf;
1020         struct nlmsghdr *rep_nlh;
1021         struct nlmsghdr *req_nlh = info->nlhdr;
1022         struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1023         int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1024         u16 cmd;
1025
1026         if ((req_userhdr->cmd & 0xC000) &&
1027             (!netlink_net_capable(skb, CAP_NET_ADMIN)))
1028                 cmd = TIPC_CMD_NOT_NET_ADMIN;
1029         else
1030                 cmd = req_userhdr->cmd;
1031
1032         rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd,
1033                                   nlmsg_data(req_nlh) + GENL_HDRLEN +
1034                                   TIPC_GENL_HDRLEN,
1035                                   nlmsg_attrlen(req_nlh, GENL_HDRLEN +
1036                                   TIPC_GENL_HDRLEN), hdr_space);
1037
1038         if (rep_buf) {
1039                 skb_push(rep_buf, hdr_space);
1040                 rep_nlh = nlmsg_hdr(rep_buf);
1041                 memcpy(rep_nlh, req_nlh, hdr_space);
1042                 rep_nlh->nlmsg_len = rep_buf->len;
1043                 genlmsg_unicast(net, rep_buf, NETLINK_CB(skb).portid);
1044         }
1045
1046         return 0;
1047 }
1048
1049 /* Temporary function to keep functionality throughout the patchset
1050  * without having to mess with the global variables and other trickery
1051  * of the old API.
1052  */
1053 static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info)
1054 {
1055         struct tipc_genlmsghdr *req = info->userhdr;
1056
1057         switch (req->cmd) {
1058         case TIPC_CMD_GET_BEARER_NAMES:
1059         case TIPC_CMD_ENABLE_BEARER:
1060         case TIPC_CMD_DISABLE_BEARER:
1061         case TIPC_CMD_SHOW_LINK_STATS:
1062         case TIPC_CMD_GET_LINKS:
1063         case TIPC_CMD_SET_LINK_TOL:
1064         case TIPC_CMD_SET_LINK_PRI:
1065         case TIPC_CMD_SET_LINK_WINDOW:
1066         case TIPC_CMD_RESET_LINK_STATS:
1067         case TIPC_CMD_SHOW_NAME_TABLE:
1068         case TIPC_CMD_SHOW_PORTS:
1069         case TIPC_CMD_GET_MEDIA_NAMES:
1070         case TIPC_CMD_GET_NODES:
1071         case TIPC_CMD_SET_NODE_ADDR:
1072         case TIPC_CMD_SET_NETID:
1073                 return tipc_nl_compat_recv(skb, info);
1074         }
1075
1076         return handle_cmd(skb, info);
1077 }
1078
1079 static struct genl_family tipc_genl_compat_family = {
1080         .id             = GENL_ID_GENERATE,
1081         .name           = TIPC_GENL_NAME,
1082         .version        = TIPC_GENL_VERSION,
1083         .hdrsize        = TIPC_GENL_HDRLEN,
1084         .maxattr        = 0,
1085         .netnsok        = true,
1086 };
1087
1088 static struct genl_ops tipc_genl_compat_ops[] = {
1089         {
1090                 .cmd            = TIPC_GENL_CMD,
1091                 .doit           = tipc_nl_compat_tmp_wrap,
1092         },
1093 };
1094
1095 int tipc_netlink_compat_start(void)
1096 {
1097         int res;
1098
1099         res = genl_register_family_with_ops(&tipc_genl_compat_family,
1100                                             tipc_genl_compat_ops);
1101         if (res) {
1102                 pr_err("Failed to register legacy compat interface\n");
1103                 return res;
1104         }
1105
1106         return 0;
1107 }
1108
1109 void tipc_netlink_compat_stop(void)
1110 {
1111         genl_unregister_family(&tipc_genl_compat_family);
1112 }