net/tipc/netlink_compat.c

   1 /*
   2  * Copyright (c) 2014, Ericsson AB
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the names of the copyright holders nor the names of its
  14  *    contributors may be used to endorse or promote products derived from
  15  *    this software without specific prior written permission.
  16  *
  17  * Alternatively, this software may be distributed under the terms of the
  18  * GNU General Public License ("GPL") version 2 as published by the Free
  19  * Software Foundation.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "core.h"
  35 #include "bearer.h"
  36 #include "link.h"
  37 #include "name_table.h"
  38 #include "socket.h"
  39 #include "node.h"
  40 #include "net.h"
  41 #include <net/genetlink.h>
  42 #include <linux/tipc_config.h>
  43
  44 /* The legacy API had an artificial message length limit called
  45  * ULTRA_STRING_MAX_LEN.
  46  */
  47 #define ULTRA_STRING_MAX_LEN 32768
  48
  49 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
  50
  51 #define REPLY_TRUNCATED "<truncated>\n"
  52
  53 struct tipc_nl_compat_msg {
  54         u16 cmd;
  55         int rep_type;
  56         int rep_size;
  57         int req_type;
  58         int req_size;
  59         struct net *net;
  60         struct sk_buff *rep;
  61         struct tlv_desc *req;
  62         struct sock *dst_sk;
  63 };
  64
  65 struct tipc_nl_compat_cmd_dump {
  66         int (*header)(struct tipc_nl_compat_msg *);
  67         int (*dumpit)(struct sk_buff *, struct netlink_callback *);
  68         int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
  69 };
  70
  71 struct tipc_nl_compat_cmd_doit {
  72         int (*doit)(struct sk_buff *skb, struct genl_info *info);
  73         int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
  74                          struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
  75 };
  76
  77 static int tipc_skb_tailroom(struct sk_buff *skb)
  78 {
  79         int tailroom;
  80         int limit;
  81
  82         tailroom = skb_tailroom(skb);
  83         limit = TIPC_SKB_MAX - skb->len;
  84
  85         if (tailroom < limit)
  86                 return tailroom;
  87
  88         return limit;
  89 }
  90
  91 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
  92 {
  93         return TLV_GET_LEN(tlv) - TLV_SPACE(0);
  94 }
  95
  96 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
  97 {
  98         struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
  99
 100         if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
 101                 return -EMSGSIZE;
 102
 103         skb_put(skb, TLV_SPACE(len));
 104         tlv->tlv_type = htons(type);
 105         tlv->tlv_len = htons(TLV_LENGTH(len));
 106         if (len && data)
 107                 memcpy(TLV_DATA(tlv), data, len);
 108
 109         return 0;
 110 }
 111
 112 static void tipc_tlv_init(struct sk_buff *skb, u16 type)
 113 {
 114         struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
 115
 116         TLV_SET_LEN(tlv, 0);
 117         TLV_SET_TYPE(tlv, type);
 118         skb_put(skb, sizeof(struct tlv_desc));
 119 }
 120
 121 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
 122 {
 123         int n;
 124         u16 len;
 125         u32 rem;
 126         char *buf;
 127         struct tlv_desc *tlv;
 128         va_list args;
 129
 130         rem = tipc_skb_tailroom(skb);
 131
 132         tlv = (struct tlv_desc *)skb->data;
 133         len = TLV_GET_LEN(tlv);
 134         buf = TLV_DATA(tlv) + len;
 135
 136         va_start(args, fmt);
 137         n = vscnprintf(buf, rem, fmt, args);
 138         va_end(args);
 139
 140         TLV_SET_LEN(tlv, n + len);
 141         skb_put(skb, n);
 142
 143         return n;
 144 }
 145
 146 static struct sk_buff *tipc_tlv_alloc(int size)
 147 {
 148         int hdr_len;
 149         struct sk_buff *buf;
 150
 151         size = TLV_SPACE(size);
 152         hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
 153
 154         buf = alloc_skb(hdr_len + size, GFP_KERNEL);
 155         if (!buf)
 156                 return NULL;
 157
 158         skb_reserve(buf, hdr_len);
 159
 160         return buf;
 161 }
 162
 163 static struct sk_buff *tipc_get_err_tlv(char *str)
 164 {
 165         int str_len = strlen(str) + 1;
 166         struct sk_buff *buf;
 167
 168         buf = tipc_tlv_alloc(TLV_SPACE(str_len));
 169         if (buf)
 170                 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
 171
 172         return buf;
 173 }
 174
 175 static inline bool string_is_valid(char *s, int len)
 176 {
 177         return memchr(s, '\0', len) ? true : false;
 178 }
 179
 180 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
 181                                    struct tipc_nl_compat_msg *msg,
 182                                    struct sk_buff *arg)
 183 {
 184         int len = 0;
 185         int err;
 186         struct sk_buff *buf;
 187         struct nlmsghdr *nlmsg;
 188         struct netlink_callback cb;
 189
 190         memset(&cb, 0, sizeof(cb));
 191         cb.nlh = (struct nlmsghdr *)arg->data;
 192         cb.skb = arg;
 193
 194         buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 195         if (!buf)
 196                 return -ENOMEM;
 197
 198         buf->sk = msg->dst_sk;
 199
 200         do {
 201                 int rem;
 202
 203                 len = (*cmd->dumpit)(buf, &cb);
 204
 205                 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
 206                         struct nlattr **attrs;
 207
 208                         err = tipc_nlmsg_parse(nlmsg, &attrs);
 209                         if (err)
 210                                 goto err_out;
 211
 212                         err = (*cmd->format)(msg, attrs);
 213                         if (err)
 214                                 goto err_out;
 215
 216                         if (tipc_skb_tailroom(msg->rep) <= 1) {
 217                                 err = -EMSGSIZE;
 218                                 goto err_out;
 219                         }
 220                 }
 221
 222                 skb_reset_tail_pointer(buf);
 223                 buf->len = 0;
 224
 225         } while (len);
 226
 227         err = 0;
 228
 229 err_out:
 230         kfree_skb(buf);
 231
 232         if (err == -EMSGSIZE) {
 233                 /* The legacy API only considered messages filling
 234                  * "ULTRA_STRING_MAX_LEN" to be truncated.
 235                  */
 236                 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
 237                         char *tail = skb_tail_pointer(msg->rep);
 238
 239                         if (*tail != '\0')
 240                                 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
 241                                         REPLY_TRUNCATED);
 242                 }
 243
 244                 return 0;
 245         }
 246
 247         return err;
 248 }
 249
 250 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
 251                                  struct tipc_nl_compat_msg *msg)
 252 {
 253         int err;
 254         struct sk_buff *arg;
 255
 256         if (msg->req_type && (!msg->req_size ||
 257                               !TLV_CHECK_TYPE(msg->req, msg->req_type)))
 258                 return -EINVAL;
 259
 260         msg->rep = tipc_tlv_alloc(msg->rep_size);
 261         if (!msg->rep)
 262                 return -ENOMEM;
 263
 264         if (msg->rep_type)
 265                 tipc_tlv_init(msg->rep, msg->rep_type);
 266
 267         if (cmd->header) {
 268                 err = (*cmd->header)(msg);
 269                 if (err) {
 270                         kfree_skb(msg->rep);
 271                         msg->rep = NULL;
 272                         return err;
 273                 }
 274         }
 275
 276         arg = nlmsg_new(0, GFP_KERNEL);
 277         if (!arg) {
 278                 kfree_skb(msg->rep);
 279                 msg->rep = NULL;
 280                 return -ENOMEM;
 281         }
 282
 283         err = __tipc_nl_compat_dumpit(cmd, msg, arg);
 284         if (err) {
 285                 kfree_skb(msg->rep);
 286                 msg->rep = NULL;
 287         }
 288         kfree_skb(arg);
 289
 290         return err;
 291 }
 292
 293 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 294                                  struct tipc_nl_compat_msg *msg)
 295 {
 296         int err;
 297         struct sk_buff *doit_buf;
 298         struct sk_buff *trans_buf;
 299         struct nlattr **attrbuf;
 300         struct genl_info info;
 301
 302         trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 303         if (!trans_buf)
 304                 return -ENOMEM;
 305
 306         err = (*cmd->transcode)(cmd, trans_buf, msg);
 307         if (err)
 308                 goto trans_out;
 309
 310         attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
 311                         sizeof(struct nlattr *), GFP_KERNEL);
 312         if (!attrbuf) {
 313                 err = -ENOMEM;
 314                 goto trans_out;
 315         }
 316
 317         err = nla_parse(attrbuf, tipc_genl_family.maxattr,
 318                         (const struct nlattr *)trans_buf->data,
 319                         trans_buf->len, NULL);
 320         if (err)
 321                 goto parse_out;
 322
 323         doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 324         if (!doit_buf) {
 325                 err = -ENOMEM;
 326                 goto parse_out;
 327         }
 328
 329         doit_buf->sk = msg->dst_sk;
 330
 331         memset(&info, 0, sizeof(info));
 332         info.attrs = attrbuf;
 333
 334         err = (*cmd->doit)(doit_buf, &info);
 335
 336         kfree_skb(doit_buf);
 337 parse_out:
 338         kfree(attrbuf);
 339 trans_out:
 340         kfree_skb(trans_buf);
 341
 342         return err;
 343 }
 344
 345 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 346                                struct tipc_nl_compat_msg *msg)
 347 {
 348         int err;
 349
 350         if (msg->req_type && (!msg->req_size ||
 351                               !TLV_CHECK_TYPE(msg->req, msg->req_type)))
 352                 return -EINVAL;
 353
 354         err = __tipc_nl_compat_doit(cmd, msg);
 355         if (err)
 356                 return err;
 357
 358         /* The legacy API considered an empty message a success message */
 359         msg->rep = tipc_tlv_alloc(0);
 360         if (!msg->rep)
 361                 return -ENOMEM;
 362
 363         return 0;
 364 }
 365
 366 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
 367                                       struct nlattr **attrs)
 368 {
 369         struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
 370
 371         nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER],
 372                          NULL);
 373
 374         return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
 375                             nla_data(bearer[TIPC_NLA_BEARER_NAME]),
 376                             nla_len(bearer[TIPC_NLA_BEARER_NAME]));
 377 }
 378
 379 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
 380                                         struct sk_buff *skb,
 381                                         struct tipc_nl_compat_msg *msg)
 382 {
 383         struct nlattr *prop;
 384         struct nlattr *bearer;
 385         struct tipc_bearer_config *b;
 386         int len;
 387
 388         b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
 389
 390         bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
 391         if (!bearer)
 392                 return -EMSGSIZE;
 393
 394         len = TLV_GET_DATA_LEN(msg->req);
 395         len -= offsetof(struct tipc_bearer_config, name);
 396         if (len <= 0)
 397                 return -EINVAL;
 398
 399         len = min_t(int, len, TIPC_MAX_BEARER_NAME);
 400         if (!string_is_valid(b->name, len))
 401                 return -EINVAL;
 402
 403         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
 404                 return -EMSGSIZE;
 405
 406         if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
 407                 return -EMSGSIZE;
 408
 409         if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
 410                 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
 411                 if (!prop)
 412                         return -EMSGSIZE;
 413                 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
 414                         return -EMSGSIZE;
 415                 nla_nest_end(skb, prop);
 416         }
 417         nla_nest_end(skb, bearer);
 418
 419         return 0;
 420 }
 421
 422 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
 423                                          struct sk_buff *skb,
 424                                          struct tipc_nl_compat_msg *msg)
 425 {
 426         char *name;
 427         struct nlattr *bearer;
 428         int len;
 429
 430         name = (char *)TLV_DATA(msg->req);
 431
 432         bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
 433         if (!bearer)
 434                 return -EMSGSIZE;
 435
 436         len = TLV_GET_DATA_LEN(msg->req);
 437         if (len <= 0)
 438                 return -EINVAL;
 439
 440         len = min_t(int, len, TIPC_MAX_BEARER_NAME);
 441         if (!string_is_valid(name, len))
 442                 return -EINVAL;
 443
 444         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
 445                 return -EMSGSIZE;
 446
 447         nla_nest_end(skb, bearer);
 448
 449         return 0;
 450 }
 451
 452 static inline u32 perc(u32 count, u32 total)
 453 {
 454         return (count * 100 + (total / 2)) / total;
 455 }
 456
 457 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
 458                                 struct nlattr *prop[], struct nlattr *stats[])
 459 {
 460         tipc_tlv_sprintf(msg->rep, "  Window:%u packets\n",
 461                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
 462
 463         tipc_tlv_sprintf(msg->rep,
 464                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
 465                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
 466                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
 467                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
 468                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
 469                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
 470
 471         tipc_tlv_sprintf(msg->rep,
 472                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
 473                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
 474                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
 475                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
 476                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
 477                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
 478
 479         tipc_tlv_sprintf(msg->rep, "  RX naks:%u defs:%u dups:%u\n",
 480                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
 481                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
 482                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
 483
 484         tipc_tlv_sprintf(msg->rep, "  TX naks:%u acks:%u dups:%u\n",
 485                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
 486                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
 487                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
 488
 489         tipc_tlv_sprintf(msg->rep,
 490                          "  Congestion link:%u  Send queue max:%u avg:%u",
 491                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
 492                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
 493                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
 494 }
 495
 496 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
 497                                          struct nlattr **attrs)
 498 {
 499         char *name;
 500         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
 501         struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
 502         struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
 503         int len;
 504
 505         nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
 506
 507         nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP],
 508                          NULL);
 509
 510         nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS],
 511                          NULL);
 512
 513         name = (char *)TLV_DATA(msg->req);
 514
 515         len = TLV_GET_DATA_LEN(msg->req);
 516         if (len <= 0)
 517                 return -EINVAL;
 518
 519         len = min_t(int, len, TIPC_MAX_LINK_NAME);
 520         if (!string_is_valid(name, len))
 521                 return -EINVAL;
 522
 523         if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
 524                 return 0;
 525
 526         tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
 527                          nla_data(link[TIPC_NLA_LINK_NAME]));
 528
 529         if (link[TIPC_NLA_LINK_BROADCAST]) {
 530                 __fill_bc_link_stat(msg, prop, stats);
 531                 return 0;
 532         }
 533
 534         if (link[TIPC_NLA_LINK_ACTIVE])
 535                 tipc_tlv_sprintf(msg->rep, "  ACTIVE");
 536         else if (link[TIPC_NLA_LINK_UP])
 537                 tipc_tlv_sprintf(msg->rep, "  STANDBY");
 538         else
 539                 tipc_tlv_sprintf(msg->rep, "  DEFUNCT");
 540
 541         tipc_tlv_sprintf(msg->rep, "  MTU:%u  Priority:%u",
 542                          nla_get_u32(link[TIPC_NLA_LINK_MTU]),
 543                          nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
 544
 545         tipc_tlv_sprintf(msg->rep, "  Tolerance:%u ms  Window:%u packets\n",
 546                          nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
 547                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
 548
 549         tipc_tlv_sprintf(msg->rep,
 550                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
 551                          nla_get_u32(link[TIPC_NLA_LINK_RX]) -
 552                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
 553                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
 554                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
 555                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
 556                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
 557
 558         tipc_tlv_sprintf(msg->rep,
 559                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
 560                          nla_get_u32(link[TIPC_NLA_LINK_TX]) -
 561                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
 562                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
 563                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
 564                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
 565                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
 566
 567         tipc_tlv_sprintf(msg->rep,
 568                          "  TX profile sample:%u packets  average:%u octets\n",
 569                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
 570                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
 571                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
 572
 573         tipc_tlv_sprintf(msg->rep,
 574                          "  0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
 575                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
 576                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 577                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
 578                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 579                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
 580                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 581                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
 582                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
 583
 584         tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
 585                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
 586                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 587                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
 588                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 589                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
 590                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
 591
 592         tipc_tlv_sprintf(msg->rep,
 593                          "  RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
 594                          nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
 595                          nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
 596                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
 597                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
 598                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
 599
 600         tipc_tlv_sprintf(msg->rep,
 601                          "  TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
 602                          nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
 603                          nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
 604                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
 605                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
 606                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
 607
 608         tipc_tlv_sprintf(msg->rep,
 609                          "  Congestion link:%u  Send queue max:%u avg:%u",
 610                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
 611                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
 612                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
 613
 614         return 0;
 615 }
 616
 617 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
 618                                     struct nlattr **attrs)
 619 {
 620         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
 621         struct tipc_link_info link_info;
 622
 623         nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
 624
 625         link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
 626         link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
 627         nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
 628                     TIPC_MAX_LINK_NAME);
 629
 630         return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
 631                             &link_info, sizeof(link_info));
 632 }
 633
 634 static int __tipc_add_link_prop(struct sk_buff *skb,
 635                                 struct tipc_nl_compat_msg *msg,
 636                                 struct tipc_link_config *lc)
 637 {
 638         switch (msg->cmd) {
 639         case TIPC_CMD_SET_LINK_PRI:
 640                 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
 641         case TIPC_CMD_SET_LINK_TOL:
 642                 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
 643         case TIPC_CMD_SET_LINK_WINDOW:
 644                 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
 645         }
 646
 647         return -EINVAL;
 648 }
 649
 650 static int tipc_nl_compat_media_set(struct sk_buff *skb,
 651                                     struct tipc_nl_compat_msg *msg)
 652 {
 653         struct nlattr *prop;
 654         struct nlattr *media;
 655         struct tipc_link_config *lc;
 656         int len;
 657
 658         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 659
 660         media = nla_nest_start(skb, TIPC_NLA_MEDIA);
 661         if (!media)
 662                 return -EMSGSIZE;
 663
 664         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
 665         if (!string_is_valid(lc->name, len))
 666                 return -EINVAL;
 667
 668         if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
 669                 return -EMSGSIZE;
 670
 671         prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
 672         if (!prop)
 673                 return -EMSGSIZE;
 674
 675         __tipc_add_link_prop(skb, msg, lc);
 676         nla_nest_end(skb, prop);
 677         nla_nest_end(skb, media);
 678
 679         return 0;
 680 }
 681
 682 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
 683                                      struct tipc_nl_compat_msg *msg)
 684 {
 685         struct nlattr *prop;
 686         struct nlattr *bearer;
 687         struct tipc_link_config *lc;
 688         int len;
 689
 690         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 691
 692         bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
 693         if (!bearer)
 694                 return -EMSGSIZE;
 695
 696         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
 697         if (!string_is_valid(lc->name, len))
 698                 return -EINVAL;
 699
 700         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
 701                 return -EMSGSIZE;
 702
 703         prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
 704         if (!prop)
 705                 return -EMSGSIZE;
 706
 707         __tipc_add_link_prop(skb, msg, lc);
 708         nla_nest_end(skb, prop);
 709         nla_nest_end(skb, bearer);
 710
 711         return 0;
 712 }
 713
 714 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
 715                                      struct tipc_nl_compat_msg *msg)
 716 {
 717         struct nlattr *prop;
 718         struct nlattr *link;
 719         struct tipc_link_config *lc;
 720
 721         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 722
 723         link = nla_nest_start(skb, TIPC_NLA_LINK);
 724         if (!link)
 725                 return -EMSGSIZE;
 726
 727         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
 728                 return -EMSGSIZE;
 729
 730         prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
 731         if (!prop)
 732                 return -EMSGSIZE;
 733
 734         __tipc_add_link_prop(skb, msg, lc);
 735         nla_nest_end(skb, prop);
 736         nla_nest_end(skb, link);
 737
 738         return 0;
 739 }
 740
 741 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
 742                                    struct sk_buff *skb,
 743                                    struct tipc_nl_compat_msg *msg)
 744 {
 745         struct tipc_link_config *lc;
 746         struct tipc_bearer *bearer;
 747         struct tipc_media *media;
 748         int len;
 749
 750         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 751
 752         len = TLV_GET_DATA_LEN(msg->req);
 753         len -= offsetof(struct tipc_link_config, name);
 754         if (len <= 0)
 755                 return -EINVAL;
 756
 757         len = min_t(int, len, TIPC_MAX_LINK_NAME);
 758         if (!string_is_valid(lc->name, len))
 759                 return -EINVAL;
 760
 761         media = tipc_media_find(lc->name);
 762         if (media) {
 763                 cmd->doit = &tipc_nl_media_set;
 764                 return tipc_nl_compat_media_set(skb, msg);
 765         }
 766
 767         bearer = tipc_bearer_find(msg->net, lc->name);
 768         if (bearer) {
 769                 cmd->doit = &tipc_nl_bearer_set;
 770                 return tipc_nl_compat_bearer_set(skb, msg);
 771         }
 772
 773         return __tipc_nl_compat_link_set(skb, msg);
 774 }
 775
 776 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
 777                                            struct sk_buff *skb,
 778                                            struct tipc_nl_compat_msg *msg)
 779 {
 780         char *name;
 781         struct nlattr *link;
 782         int len;
 783
 784         name = (char *)TLV_DATA(msg->req);
 785
 786         link = nla_nest_start(skb, TIPC_NLA_LINK);
 787         if (!link)
 788                 return -EMSGSIZE;
 789
 790         len = TLV_GET_DATA_LEN(msg->req);
 791         if (len <= 0)
 792                 return -EINVAL;
 793
 794         len = min_t(int, len, TIPC_MAX_LINK_NAME);
 795         if (!string_is_valid(name, len))
 796                 return -EINVAL;
 797
 798         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
 799                 return -EMSGSIZE;
 800
 801         nla_nest_end(skb, link);
 802
 803         return 0;
 804 }
 805
 806 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
 807 {
 808         int i;
 809         u32 depth;
 810         struct tipc_name_table_query *ntq;
 811         static const char * const header[] = {
 812                 "Type       ",
 813                 "Lower      Upper      ",
 814                 "Port Identity              ",
 815                 "Publication Scope"
 816         };
 817
 818         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
 819         if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
 820                 return -EINVAL;
 821
 822         depth = ntohl(ntq->depth);
 823
 824         if (depth > 4)
 825                 depth = 4;
 826         for (i = 0; i < depth; i++)
 827                 tipc_tlv_sprintf(msg->rep, header[i]);
 828         tipc_tlv_sprintf(msg->rep, "\n");
 829
 830         return 0;
 831 }
 832
 833 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
 834                                           struct nlattr **attrs)
 835 {
 836         char port_str[27];
 837         struct tipc_name_table_query *ntq;
 838         struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
 839         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
 840         u32 node, depth, type, lowbound, upbound;
 841         static const char * const scope_str[] = {"", " zone", " cluster",
 842                                                  " node"};
 843
 844         nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
 845                          attrs[TIPC_NLA_NAME_TABLE], NULL);
 846
 847         nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL],
 848                          NULL);
 849
 850         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
 851
 852         depth = ntohl(ntq->depth);
 853         type = ntohl(ntq->type);
 854         lowbound = ntohl(ntq->lowbound);
 855         upbound = ntohl(ntq->upbound);
 856
 857         if (!(depth & TIPC_NTQ_ALLTYPES) &&
 858             (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
 859                 return 0;
 860         if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
 861                 return 0;
 862         if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
 863                 return 0;
 864
 865         tipc_tlv_sprintf(msg->rep, "%-10u ",
 866                          nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
 867
 868         if (depth == 1)
 869                 goto out;
 870
 871         tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
 872                          nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
 873                          nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
 874
 875         if (depth == 2)
 876                 goto out;
 877
 878         node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
 879         sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
 880                 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
 881         tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
 882
 883         if (depth == 3)
 884                 goto out;
 885
 886         tipc_tlv_sprintf(msg->rep, "%-10u %s",
 887                          nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
 888                          scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
 889 out:
 890         tipc_tlv_sprintf(msg->rep, "\n");
 891
 892         return 0;
 893 }
 894
 895 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
 896                                       struct nlattr **attrs)
 897 {
 898         u32 type, lower, upper;
 899         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
 900
 901         nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL);
 902
 903         type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
 904         lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
 905         upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
 906
 907         if (lower == upper)
 908                 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
 909         else
 910                 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
 911
 912         return 0;
 913 }
 914
 915 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
 916 {
 917         int err;
 918         void *hdr;
 919         struct nlattr *nest;
 920         struct sk_buff *args;
 921         struct tipc_nl_compat_cmd_dump dump;
 922
 923         args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 924         if (!args)
 925                 return -ENOMEM;
 926
 927         hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
 928                           TIPC_NL_PUBL_GET);
 929         if (!hdr) {
 930                 kfree_skb(args);
 931                 return -EMSGSIZE;
 932         }
 933
 934         nest = nla_nest_start(args, TIPC_NLA_SOCK);
 935         if (!nest) {
 936                 kfree_skb(args);
 937                 return -EMSGSIZE;
 938         }
 939
 940         if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
 941                 kfree_skb(args);
 942                 return -EMSGSIZE;
 943         }
 944
 945         nla_nest_end(args, nest);
 946         genlmsg_end(args, hdr);
 947
 948         dump.dumpit = tipc_nl_publ_dump;
 949         dump.format = __tipc_nl_compat_publ_dump;
 950
 951         err = __tipc_nl_compat_dumpit(&dump, msg, args);
 952
 953         kfree_skb(args);
 954
 955         return err;
 956 }
 957
 958 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
 959                                   struct nlattr **attrs)
 960 {
 961         int err;
 962         u32 sock_ref;
 963         struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
 964
 965         nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL);
 966
 967         sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
 968         tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
 969
 970         if (sock[TIPC_NLA_SOCK_CON]) {
 971                 u32 node;
 972                 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
 973
 974                 nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON],
 975                                  NULL);
 976
 977                 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
 978                 tipc_tlv_sprintf(msg->rep, "  connected to <%u.%u.%u:%u>",
 979                                  tipc_zone(node),
 980                                  tipc_cluster(node),
 981                                  tipc_node(node),
 982                                  nla_get_u32(con[TIPC_NLA_CON_SOCK]));
 983
 984                 if (con[TIPC_NLA_CON_FLAG])
 985                         tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
 986                                          nla_get_u32(con[TIPC_NLA_CON_TYPE]),
 987                                          nla_get_u32(con[TIPC_NLA_CON_INST]));
 988                 else
 989                         tipc_tlv_sprintf(msg->rep, "\n");
 990         } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
 991                 tipc_tlv_sprintf(msg->rep, " bound to");
 992
 993                 err = tipc_nl_compat_publ_dump(msg, sock_ref);
 994                 if (err)
 995                         return err;
 996         }
 997         tipc_tlv_sprintf(msg->rep, "\n");
 998
 999         return 0;
1000 }
1001
1002 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1003                                      struct nlattr **attrs)
1004 {
1005         struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1006
1007         nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA],
1008                          NULL);
1009
1010         return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1011                             nla_data(media[TIPC_NLA_MEDIA_NAME]),
1012                             nla_len(media[TIPC_NLA_MEDIA_NAME]));
1013 }
1014
1015 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1016                                     struct nlattr **attrs)
1017 {
1018         struct tipc_node_info node_info;
1019         struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1020
1021         nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL);
1022
1023         node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1024         node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1025
1026         return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1027                             sizeof(node_info));
1028 }
1029
1030 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1031                                   struct sk_buff *skb,
1032                                   struct tipc_nl_compat_msg *msg)
1033 {
1034         u32 val;
1035         struct nlattr *net;
1036
1037         val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1038
1039         net = nla_nest_start(skb, TIPC_NLA_NET);
1040         if (!net)
1041                 return -EMSGSIZE;
1042
1043         if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1044                 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1045                         return -EMSGSIZE;
1046         } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1047                 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1048                         return -EMSGSIZE;
1049         }
1050         nla_nest_end(skb, net);
1051
1052         return 0;
1053 }
1054
1055 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1056                                    struct nlattr **attrs)
1057 {
1058         __be32 id;
1059         struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1060
1061         nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL);
1062         id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1063
1064         return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1065 }
1066
1067 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1068 {
1069         msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1070         if (!msg->rep)
1071                 return -ENOMEM;
1072
1073         tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1074         tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1075
1076         return 0;
1077 }
1078
1079 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1080 {
1081         struct tipc_nl_compat_cmd_dump dump;
1082         struct tipc_nl_compat_cmd_doit doit;
1083
1084         memset(&dump, 0, sizeof(dump));
1085         memset(&doit, 0, sizeof(doit));
1086
1087         switch (msg->cmd) {
1088         case TIPC_CMD_NOOP:
1089                 msg->rep = tipc_tlv_alloc(0);
1090                 if (!msg->rep)
1091                         return -ENOMEM;
1092                 return 0;
1093         case TIPC_CMD_GET_BEARER_NAMES:
1094                 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1095                 dump.dumpit = tipc_nl_bearer_dump;
1096                 dump.format = tipc_nl_compat_bearer_dump;
1097                 return tipc_nl_compat_dumpit(&dump, msg);
1098         case TIPC_CMD_ENABLE_BEARER:
1099                 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1100                 doit.doit = tipc_nl_bearer_enable;
1101                 doit.transcode = tipc_nl_compat_bearer_enable;
1102                 return tipc_nl_compat_doit(&doit, msg);
1103         case TIPC_CMD_DISABLE_BEARER:
1104                 msg->req_type = TIPC_TLV_BEARER_NAME;
1105                 doit.doit = tipc_nl_bearer_disable;
1106                 doit.transcode = tipc_nl_compat_bearer_disable;
1107                 return tipc_nl_compat_doit(&doit, msg);
1108         case TIPC_CMD_SHOW_LINK_STATS:
1109                 msg->req_type = TIPC_TLV_LINK_NAME;
1110                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1111                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1112                 dump.dumpit = tipc_nl_link_dump;
1113                 dump.format = tipc_nl_compat_link_stat_dump;
1114                 return tipc_nl_compat_dumpit(&dump, msg);
1115         case TIPC_CMD_GET_LINKS:
1116                 msg->req_type = TIPC_TLV_NET_ADDR;
1117                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1118                 dump.dumpit = tipc_nl_link_dump;
1119                 dump.format = tipc_nl_compat_link_dump;
1120                 return tipc_nl_compat_dumpit(&dump, msg);
1121         case TIPC_CMD_SET_LINK_TOL:
1122         case TIPC_CMD_SET_LINK_PRI:
1123         case TIPC_CMD_SET_LINK_WINDOW:
1124                 msg->req_type =  TIPC_TLV_LINK_CONFIG;
1125                 doit.doit = tipc_nl_link_set;
1126                 doit.transcode = tipc_nl_compat_link_set;
1127                 return tipc_nl_compat_doit(&doit, msg);
1128         case TIPC_CMD_RESET_LINK_STATS:
1129                 msg->req_type = TIPC_TLV_LINK_NAME;
1130                 doit.doit = tipc_nl_link_reset_stats;
1131                 doit.transcode = tipc_nl_compat_link_reset_stats;
1132                 return tipc_nl_compat_doit(&doit, msg);
1133         case TIPC_CMD_SHOW_NAME_TABLE:
1134                 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1135                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1136                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1137                 dump.header = tipc_nl_compat_name_table_dump_header;
1138                 dump.dumpit = tipc_nl_name_table_dump;
1139                 dump.format = tipc_nl_compat_name_table_dump;
1140                 return tipc_nl_compat_dumpit(&dump, msg);
1141         case TIPC_CMD_SHOW_PORTS:
1142                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1143                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1144                 dump.dumpit = tipc_nl_sk_dump;
1145                 dump.format = tipc_nl_compat_sk_dump;
1146                 return tipc_nl_compat_dumpit(&dump, msg);
1147         case TIPC_CMD_GET_MEDIA_NAMES:
1148                 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1149                 dump.dumpit = tipc_nl_media_dump;
1150                 dump.format = tipc_nl_compat_media_dump;
1151                 return tipc_nl_compat_dumpit(&dump, msg);
1152         case TIPC_CMD_GET_NODES:
1153                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1154                 dump.dumpit = tipc_nl_node_dump;
1155                 dump.format = tipc_nl_compat_node_dump;
1156                 return tipc_nl_compat_dumpit(&dump, msg);
1157         case TIPC_CMD_SET_NODE_ADDR:
1158                 msg->req_type = TIPC_TLV_NET_ADDR;
1159                 doit.doit = tipc_nl_net_set;
1160                 doit.transcode = tipc_nl_compat_net_set;
1161                 return tipc_nl_compat_doit(&doit, msg);
1162         case TIPC_CMD_SET_NETID:
1163                 msg->req_type = TIPC_TLV_UNSIGNED;
1164                 doit.doit = tipc_nl_net_set;
1165                 doit.transcode = tipc_nl_compat_net_set;
1166                 return tipc_nl_compat_doit(&doit, msg);
1167         case TIPC_CMD_GET_NETID:
1168                 msg->rep_size = sizeof(u32);
1169                 dump.dumpit = tipc_nl_net_dump;
1170                 dump.format = tipc_nl_compat_net_dump;
1171                 return tipc_nl_compat_dumpit(&dump, msg);
1172         case TIPC_CMD_SHOW_STATS:
1173                 return tipc_cmd_show_stats_compat(msg);
1174         }
1175
1176         return -EOPNOTSUPP;
1177 }
1178
1179 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1180 {
1181         int err;
1182         int len;
1183         struct tipc_nl_compat_msg msg;
1184         struct nlmsghdr *req_nlh;
1185         struct nlmsghdr *rep_nlh;
1186         struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1187
1188         memset(&msg, 0, sizeof(msg));
1189
1190         req_nlh = (struct nlmsghdr *)skb->data;
1191         msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1192         msg.cmd = req_userhdr->cmd;
1193         msg.dst_sk = info->dst_sk;
1194         msg.net = genl_info_net(info);
1195
1196         if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1197                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1198                 err = -EACCES;
1199                 goto send;
1200         }
1201
1202         msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1203         if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
1204                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1205                 err = -EOPNOTSUPP;
1206                 goto send;
1207         }
1208
1209         err = tipc_nl_compat_handle(&msg);
1210         if ((err == -EOPNOTSUPP) || (err == -EPERM))
1211                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1212         else if (err == -EINVAL)
1213                 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1214 send:
1215         if (!msg.rep)
1216                 return err;
1217
1218         len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1219         skb_push(msg.rep, len);
1220         rep_nlh = nlmsg_hdr(msg.rep);
1221         memcpy(rep_nlh, info->nlhdr, len);
1222         rep_nlh->nlmsg_len = msg.rep->len;
1223         genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1224
1225         return err;
1226 }
1227
1228 static struct genl_family tipc_genl_compat_family = {
1229         .id             = GENL_ID_GENERATE,
1230         .name           = TIPC_GENL_NAME,
1231         .version        = TIPC_GENL_VERSION,
1232         .hdrsize        = TIPC_GENL_HDRLEN,
1233         .maxattr        = 0,
1234         .netnsok        = true,
1235 };
1236
1237 static struct genl_ops tipc_genl_compat_ops[] = {
1238         {
1239                 .cmd            = TIPC_GENL_CMD,
1240                 .doit           = tipc_nl_compat_recv,
1241         },
1242 };
1243
1244 int tipc_netlink_compat_start(void)
1245 {
1246         int res;
1247
1248         res = genl_register_family_with_ops(&tipc_genl_compat_family,
1249                                             tipc_genl_compat_ops);
1250         if (res) {
1251                 pr_err("Failed to register legacy compat interface\n");
1252                 return res;
1253         }
1254
1255         return 0;
1256 }
1257
1258 void tipc_netlink_compat_stop(void)
1259 {
1260         genl_unregister_family(&tipc_genl_compat_family);
1261 }