net/tipc/netlink_compat.c

   1 /*
   2  * Copyright (c) 2014, Ericsson AB
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the names of the copyright holders nor the names of its
  14  *    contributors may be used to endorse or promote products derived from
  15  *    this software without specific prior written permission.
  16  *
  17  * Alternatively, this software may be distributed under the terms of the
  18  * GNU General Public License ("GPL") version 2 as published by the Free
  19  * Software Foundation.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "core.h"
  35 #include "bearer.h"
  36 #include "link.h"
  37 #include "name_table.h"
  38 #include "socket.h"
  39 #include "node.h"
  40 #include "net.h"
  41 #include <net/genetlink.h>
  42 #include <linux/tipc_config.h>
  43
  44 /* The legacy API had an artificial message length limit called
  45  * ULTRA_STRING_MAX_LEN.
  46  */
  47 #define ULTRA_STRING_MAX_LEN 32768
  48
  49 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
  50
  51 #define REPLY_TRUNCATED "<truncated>\n"
  52
  53 struct tipc_nl_compat_msg {
  54         u16 cmd;
  55         int rep_type;
  56         int rep_size;
  57         int req_type;
  58         struct net *net;
  59         struct sk_buff *rep;
  60         struct tlv_desc *req;
  61         struct sock *dst_sk;
  62 };
  63
  64 struct tipc_nl_compat_cmd_dump {
  65         int (*header)(struct tipc_nl_compat_msg *);
  66         int (*dumpit)(struct sk_buff *, struct netlink_callback *);
  67         int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
  68 };
  69
  70 struct tipc_nl_compat_cmd_doit {
  71         int (*doit)(struct sk_buff *skb, struct genl_info *info);
  72         int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
  73                          struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
  74 };
  75
  76 static int tipc_skb_tailroom(struct sk_buff *skb)
  77 {
  78         int tailroom;
  79         int limit;
  80
  81         tailroom = skb_tailroom(skb);
  82         limit = TIPC_SKB_MAX - skb->len;
  83
  84         if (tailroom < limit)
  85                 return tailroom;
  86
  87         return limit;
  88 }
  89
  90 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
  91 {
  92         return TLV_GET_LEN(tlv) - TLV_SPACE(0);
  93 }
  94
  95 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
  96 {
  97         struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
  98
  99         if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
 100                 return -EMSGSIZE;
 101
 102         skb_put(skb, TLV_SPACE(len));
 103         tlv->tlv_type = htons(type);
 104         tlv->tlv_len = htons(TLV_LENGTH(len));
 105         if (len && data)
 106                 memcpy(TLV_DATA(tlv), data, len);
 107
 108         return 0;
 109 }
 110
 111 static void tipc_tlv_init(struct sk_buff *skb, u16 type)
 112 {
 113         struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
 114
 115         TLV_SET_LEN(tlv, 0);
 116         TLV_SET_TYPE(tlv, type);
 117         skb_put(skb, sizeof(struct tlv_desc));
 118 }
 119
 120 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
 121 {
 122         int n;
 123         u16 len;
 124         u32 rem;
 125         char *buf;
 126         struct tlv_desc *tlv;
 127         va_list args;
 128
 129         rem = tipc_skb_tailroom(skb);
 130
 131         tlv = (struct tlv_desc *)skb->data;
 132         len = TLV_GET_LEN(tlv);
 133         buf = TLV_DATA(tlv) + len;
 134
 135         va_start(args, fmt);
 136         n = vscnprintf(buf, rem, fmt, args);
 137         va_end(args);
 138
 139         TLV_SET_LEN(tlv, n + len);
 140         skb_put(skb, n);
 141
 142         return n;
 143 }
 144
 145 static struct sk_buff *tipc_tlv_alloc(int size)
 146 {
 147         int hdr_len;
 148         struct sk_buff *buf;
 149
 150         size = TLV_SPACE(size);
 151         hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
 152
 153         buf = alloc_skb(hdr_len + size, GFP_KERNEL);
 154         if (!buf)
 155                 return NULL;
 156
 157         skb_reserve(buf, hdr_len);
 158
 159         return buf;
 160 }
 161
 162 static struct sk_buff *tipc_get_err_tlv(char *str)
 163 {
 164         int str_len = strlen(str) + 1;
 165         struct sk_buff *buf;
 166
 167         buf = tipc_tlv_alloc(TLV_SPACE(str_len));
 168         if (buf)
 169                 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
 170
 171         return buf;
 172 }
 173
 174 static inline bool string_is_valid(char *s, int len)
 175 {
 176         return memchr(s, '\0', len) ? true : false;
 177 }
 178
 179 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
 180                                    struct tipc_nl_compat_msg *msg,
 181                                    struct sk_buff *arg)
 182 {
 183         int len = 0;
 184         int err;
 185         struct sk_buff *buf;
 186         struct nlmsghdr *nlmsg;
 187         struct netlink_callback cb;
 188
 189         memset(&cb, 0, sizeof(cb));
 190         cb.nlh = (struct nlmsghdr *)arg->data;
 191         cb.skb = arg;
 192
 193         buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 194         if (!buf)
 195                 return -ENOMEM;
 196
 197         buf->sk = msg->dst_sk;
 198         if (__tipc_dump_start(&cb, msg->net)) {
 199                 kfree_skb(buf);
 200                 return -ENOMEM;
 201         }
 202
 203         do {
 204                 int rem;
 205
 206                 len = (*cmd->dumpit)(buf, &cb);
 207
 208                 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
 209                         struct nlattr **attrs;
 210
 211                         err = tipc_nlmsg_parse(nlmsg, &attrs);
 212                         if (err)
 213                                 goto err_out;
 214
 215                         err = (*cmd->format)(msg, attrs);
 216                         if (err)
 217                                 goto err_out;
 218
 219                         if (tipc_skb_tailroom(msg->rep) <= 1) {
 220                                 err = -EMSGSIZE;
 221                                 goto err_out;
 222                         }
 223                 }
 224
 225                 skb_reset_tail_pointer(buf);
 226                 buf->len = 0;
 227
 228         } while (len);
 229
 230         err = 0;
 231
 232 err_out:
 233         tipc_dump_done(&cb);
 234         kfree_skb(buf);
 235
 236         if (err == -EMSGSIZE) {
 237                 /* The legacy API only considered messages filling
 238                  * "ULTRA_STRING_MAX_LEN" to be truncated.
 239                  */
 240                 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
 241                         char *tail = skb_tail_pointer(msg->rep);
 242
 243                         if (*tail != '\0')
 244                                 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
 245                                         REPLY_TRUNCATED);
 246                 }
 247
 248                 return 0;
 249         }
 250
 251         return err;
 252 }
 253
 254 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
 255                                  struct tipc_nl_compat_msg *msg)
 256 {
 257         int err;
 258         struct sk_buff *arg;
 259
 260         if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
 261                 return -EINVAL;
 262
 263         msg->rep = tipc_tlv_alloc(msg->rep_size);
 264         if (!msg->rep)
 265                 return -ENOMEM;
 266
 267         if (msg->rep_type)
 268                 tipc_tlv_init(msg->rep, msg->rep_type);
 269
 270         if (cmd->header) {
 271                 err = (*cmd->header)(msg);
 272                 if (err) {
 273                         kfree_skb(msg->rep);
 274                         msg->rep = NULL;
 275                         return err;
 276                 }
 277         }
 278
 279         arg = nlmsg_new(0, GFP_KERNEL);
 280         if (!arg) {
 281                 kfree_skb(msg->rep);
 282                 msg->rep = NULL;
 283                 return -ENOMEM;
 284         }
 285
 286         err = __tipc_nl_compat_dumpit(cmd, msg, arg);
 287         if (err) {
 288                 kfree_skb(msg->rep);
 289                 msg->rep = NULL;
 290         }
 291         kfree_skb(arg);
 292
 293         return err;
 294 }
 295
 296 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 297                                  struct tipc_nl_compat_msg *msg)
 298 {
 299         int err;
 300         struct sk_buff *doit_buf;
 301         struct sk_buff *trans_buf;
 302         struct nlattr **attrbuf;
 303         struct genl_info info;
 304
 305         trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 306         if (!trans_buf)
 307                 return -ENOMEM;
 308
 309         attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
 310                                 sizeof(struct nlattr *),
 311                                 GFP_KERNEL);
 312         if (!attrbuf) {
 313                 err = -ENOMEM;
 314                 goto trans_out;
 315         }
 316
 317         doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 318         if (!doit_buf) {
 319                 err = -ENOMEM;
 320                 goto attrbuf_out;
 321         }
 322
 323         memset(&info, 0, sizeof(info));
 324         info.attrs = attrbuf;
 325
 326         rtnl_lock();
 327         err = (*cmd->transcode)(cmd, trans_buf, msg);
 328         if (err)
 329                 goto doit_out;
 330
 331         err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr,
 332                                    (const struct nlattr *)trans_buf->data,
 333                                    trans_buf->len, NULL, NULL);
 334         if (err)
 335                 goto doit_out;
 336
 337         doit_buf->sk = msg->dst_sk;
 338
 339         err = (*cmd->doit)(doit_buf, &info);
 340 doit_out:
 341         rtnl_unlock();
 342
 343         kfree_skb(doit_buf);
 344 attrbuf_out:
 345         kfree(attrbuf);
 346 trans_out:
 347         kfree_skb(trans_buf);
 348
 349         return err;
 350 }
 351
 352 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 353                                struct tipc_nl_compat_msg *msg)
 354 {
 355         int err;
 356
 357         if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
 358                 return -EINVAL;
 359
 360         err = __tipc_nl_compat_doit(cmd, msg);
 361         if (err)
 362                 return err;
 363
 364         /* The legacy API considered an empty message a success message */
 365         msg->rep = tipc_tlv_alloc(0);
 366         if (!msg->rep)
 367                 return -ENOMEM;
 368
 369         return 0;
 370 }
 371
 372 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
 373                                       struct nlattr **attrs)
 374 {
 375         struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
 376         int err;
 377
 378         if (!attrs[TIPC_NLA_BEARER])
 379                 return -EINVAL;
 380
 381         err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX,
 382                                           attrs[TIPC_NLA_BEARER], NULL, NULL);
 383         if (err)
 384                 return err;
 385
 386         return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
 387                             nla_data(bearer[TIPC_NLA_BEARER_NAME]),
 388                             nla_len(bearer[TIPC_NLA_BEARER_NAME]));
 389 }
 390
 391 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
 392                                         struct sk_buff *skb,
 393                                         struct tipc_nl_compat_msg *msg)
 394 {
 395         struct nlattr *prop;
 396         struct nlattr *bearer;
 397         struct tipc_bearer_config *b;
 398         int len;
 399
 400         b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
 401
 402         bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
 403         if (!bearer)
 404                 return -EMSGSIZE;
 405
 406         len = TLV_GET_DATA_LEN(msg->req);
 407         len -= offsetof(struct tipc_bearer_config, name);
 408         if (len <= 0)
 409                 return -EINVAL;
 410
 411         len = min_t(int, len, TIPC_MAX_BEARER_NAME);
 412         if (!string_is_valid(b->name, len))
 413                 return -EINVAL;
 414
 415         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
 416                 return -EMSGSIZE;
 417
 418         if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
 419                 return -EMSGSIZE;
 420
 421         if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
 422                 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
 423                 if (!prop)
 424                         return -EMSGSIZE;
 425                 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
 426                         return -EMSGSIZE;
 427                 nla_nest_end(skb, prop);
 428         }
 429         nla_nest_end(skb, bearer);
 430
 431         return 0;
 432 }
 433
 434 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
 435                                          struct sk_buff *skb,
 436                                          struct tipc_nl_compat_msg *msg)
 437 {
 438         char *name;
 439         struct nlattr *bearer;
 440         int len;
 441
 442         name = (char *)TLV_DATA(msg->req);
 443
 444         bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
 445         if (!bearer)
 446                 return -EMSGSIZE;
 447
 448         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_BEARER_NAME);
 449         if (!string_is_valid(name, len))
 450                 return -EINVAL;
 451
 452         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
 453                 return -EMSGSIZE;
 454
 455         nla_nest_end(skb, bearer);
 456
 457         return 0;
 458 }
 459
 460 static inline u32 perc(u32 count, u32 total)
 461 {
 462         return (count * 100 + (total / 2)) / total;
 463 }
 464
 465 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
 466                                 struct nlattr *prop[], struct nlattr *stats[])
 467 {
 468         tipc_tlv_sprintf(msg->rep, "  Window:%u packets\n",
 469                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
 470
 471         tipc_tlv_sprintf(msg->rep,
 472                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
 473                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
 474                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
 475                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
 476                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
 477                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
 478
 479         tipc_tlv_sprintf(msg->rep,
 480                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
 481                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
 482                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
 483                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
 484                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
 485                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
 486
 487         tipc_tlv_sprintf(msg->rep, "  RX naks:%u defs:%u dups:%u\n",
 488                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
 489                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
 490                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
 491
 492         tipc_tlv_sprintf(msg->rep, "  TX naks:%u acks:%u dups:%u\n",
 493                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
 494                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
 495                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
 496
 497         tipc_tlv_sprintf(msg->rep,
 498                          "  Congestion link:%u  Send queue max:%u avg:%u",
 499                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
 500                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
 501                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
 502 }
 503
 504 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
 505                                          struct nlattr **attrs)
 506 {
 507         char *name;
 508         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
 509         struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
 510         struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
 511         int err;
 512         int len;
 513
 514         if (!attrs[TIPC_NLA_LINK])
 515                 return -EINVAL;
 516
 517         err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
 518                                           attrs[TIPC_NLA_LINK], NULL, NULL);
 519         if (err)
 520                 return err;
 521
 522         if (!link[TIPC_NLA_LINK_PROP])
 523                 return -EINVAL;
 524
 525         err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX,
 526                                           link[TIPC_NLA_LINK_PROP], NULL,
 527                                           NULL);
 528         if (err)
 529                 return err;
 530
 531         if (!link[TIPC_NLA_LINK_STATS])
 532                 return -EINVAL;
 533
 534         err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX,
 535                                           link[TIPC_NLA_LINK_STATS], NULL,
 536                                           NULL);
 537         if (err)
 538                 return err;
 539
 540         name = (char *)TLV_DATA(msg->req);
 541
 542         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
 543         if (!string_is_valid(name, len))
 544                 return -EINVAL;
 545
 546         if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
 547                 return 0;
 548
 549         tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
 550                          nla_data(link[TIPC_NLA_LINK_NAME]));
 551
 552         if (link[TIPC_NLA_LINK_BROADCAST]) {
 553                 __fill_bc_link_stat(msg, prop, stats);
 554                 return 0;
 555         }
 556
 557         if (link[TIPC_NLA_LINK_ACTIVE])
 558                 tipc_tlv_sprintf(msg->rep, "  ACTIVE");
 559         else if (link[TIPC_NLA_LINK_UP])
 560                 tipc_tlv_sprintf(msg->rep, "  STANDBY");
 561         else
 562                 tipc_tlv_sprintf(msg->rep, "  DEFUNCT");
 563
 564         tipc_tlv_sprintf(msg->rep, "  MTU:%u  Priority:%u",
 565                          nla_get_u32(link[TIPC_NLA_LINK_MTU]),
 566                          nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
 567
 568         tipc_tlv_sprintf(msg->rep, "  Tolerance:%u ms  Window:%u packets\n",
 569                          nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
 570                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
 571
 572         tipc_tlv_sprintf(msg->rep,
 573                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
 574                          nla_get_u32(link[TIPC_NLA_LINK_RX]) -
 575                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
 576                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
 577                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
 578                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
 579                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
 580
 581         tipc_tlv_sprintf(msg->rep,
 582                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
 583                          nla_get_u32(link[TIPC_NLA_LINK_TX]) -
 584                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
 585                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
 586                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
 587                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
 588                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
 589
 590         tipc_tlv_sprintf(msg->rep,
 591                          "  TX profile sample:%u packets  average:%u octets\n",
 592                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
 593                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
 594                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
 595
 596         tipc_tlv_sprintf(msg->rep,
 597                          "  0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
 598                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
 599                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 600                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
 601                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 602                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
 603                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 604                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
 605                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
 606
 607         tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
 608                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
 609                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 610                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
 611                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
 612                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
 613                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
 614
 615         tipc_tlv_sprintf(msg->rep,
 616                          "  RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
 617                          nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
 618                          nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
 619                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
 620                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
 621                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
 622
 623         tipc_tlv_sprintf(msg->rep,
 624                          "  TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
 625                          nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
 626                          nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
 627                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
 628                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
 629                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
 630
 631         tipc_tlv_sprintf(msg->rep,
 632                          "  Congestion link:%u  Send queue max:%u avg:%u",
 633                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
 634                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
 635                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
 636
 637         return 0;
 638 }
 639
 640 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
 641                                     struct nlattr **attrs)
 642 {
 643         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
 644         struct tipc_link_info link_info;
 645         int err;
 646
 647         if (!attrs[TIPC_NLA_LINK])
 648                 return -EINVAL;
 649
 650         err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
 651                                           attrs[TIPC_NLA_LINK], NULL, NULL);
 652         if (err)
 653                 return err;
 654
 655         link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
 656         link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
 657         nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
 658                     TIPC_MAX_LINK_NAME);
 659
 660         return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
 661                             &link_info, sizeof(link_info));
 662 }
 663
 664 static int __tipc_add_link_prop(struct sk_buff *skb,
 665                                 struct tipc_nl_compat_msg *msg,
 666                                 struct tipc_link_config *lc)
 667 {
 668         switch (msg->cmd) {
 669         case TIPC_CMD_SET_LINK_PRI:
 670                 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
 671         case TIPC_CMD_SET_LINK_TOL:
 672                 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
 673         case TIPC_CMD_SET_LINK_WINDOW:
 674                 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
 675         }
 676
 677         return -EINVAL;
 678 }
 679
 680 static int tipc_nl_compat_media_set(struct sk_buff *skb,
 681                                     struct tipc_nl_compat_msg *msg)
 682 {
 683         struct nlattr *prop;
 684         struct nlattr *media;
 685         struct tipc_link_config *lc;
 686         int len;
 687
 688         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 689
 690         media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA);
 691         if (!media)
 692                 return -EMSGSIZE;
 693
 694         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
 695         if (!string_is_valid(lc->name, len))
 696                 return -EINVAL;
 697
 698         if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
 699                 return -EMSGSIZE;
 700
 701         prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP);
 702         if (!prop)
 703                 return -EMSGSIZE;
 704
 705         __tipc_add_link_prop(skb, msg, lc);
 706         nla_nest_end(skb, prop);
 707         nla_nest_end(skb, media);
 708
 709         return 0;
 710 }
 711
 712 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
 713                                      struct tipc_nl_compat_msg *msg)
 714 {
 715         struct nlattr *prop;
 716         struct nlattr *bearer;
 717         struct tipc_link_config *lc;
 718         int len;
 719
 720         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 721
 722         bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
 723         if (!bearer)
 724                 return -EMSGSIZE;
 725
 726         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
 727         if (!string_is_valid(lc->name, len))
 728                 return -EINVAL;
 729
 730         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
 731                 return -EMSGSIZE;
 732
 733         prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
 734         if (!prop)
 735                 return -EMSGSIZE;
 736
 737         __tipc_add_link_prop(skb, msg, lc);
 738         nla_nest_end(skb, prop);
 739         nla_nest_end(skb, bearer);
 740
 741         return 0;
 742 }
 743
 744 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
 745                                      struct tipc_nl_compat_msg *msg)
 746 {
 747         struct nlattr *prop;
 748         struct nlattr *link;
 749         struct tipc_link_config *lc;
 750
 751         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 752
 753         link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
 754         if (!link)
 755                 return -EMSGSIZE;
 756
 757         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
 758                 return -EMSGSIZE;
 759
 760         prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP);
 761         if (!prop)
 762                 return -EMSGSIZE;
 763
 764         __tipc_add_link_prop(skb, msg, lc);
 765         nla_nest_end(skb, prop);
 766         nla_nest_end(skb, link);
 767
 768         return 0;
 769 }
 770
 771 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
 772                                    struct sk_buff *skb,
 773                                    struct tipc_nl_compat_msg *msg)
 774 {
 775         struct tipc_link_config *lc;
 776         struct tipc_bearer *bearer;
 777         struct tipc_media *media;
 778         int len;
 779
 780         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
 781
 782         len = TLV_GET_DATA_LEN(msg->req);
 783         len -= offsetof(struct tipc_link_config, name);
 784         if (len <= 0)
 785                 return -EINVAL;
 786
 787         len = min_t(int, len, TIPC_MAX_LINK_NAME);
 788         if (!string_is_valid(lc->name, len))
 789                 return -EINVAL;
 790
 791         media = tipc_media_find(lc->name);
 792         if (media) {
 793                 cmd->doit = &__tipc_nl_media_set;
 794                 return tipc_nl_compat_media_set(skb, msg);
 795         }
 796
 797         bearer = tipc_bearer_find(msg->net, lc->name);
 798         if (bearer) {
 799                 cmd->doit = &__tipc_nl_bearer_set;
 800                 return tipc_nl_compat_bearer_set(skb, msg);
 801         }
 802
 803         return __tipc_nl_compat_link_set(skb, msg);
 804 }
 805
 806 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
 807                                            struct sk_buff *skb,
 808                                            struct tipc_nl_compat_msg *msg)
 809 {
 810         char *name;
 811         struct nlattr *link;
 812         int len;
 813
 814         name = (char *)TLV_DATA(msg->req);
 815
 816         link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
 817         if (!link)
 818                 return -EMSGSIZE;
 819
 820         len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
 821         if (!string_is_valid(name, len))
 822                 return -EINVAL;
 823
 824         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
 825                 return -EMSGSIZE;
 826
 827         nla_nest_end(skb, link);
 828
 829         return 0;
 830 }
 831
 832 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
 833 {
 834         int i;
 835         u32 depth;
 836         struct tipc_name_table_query *ntq;
 837         static const char * const header[] = {
 838                 "Type       ",
 839                 "Lower      Upper      ",
 840                 "Port Identity              ",
 841                 "Publication Scope"
 842         };
 843
 844         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
 845         if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
 846                 return -EINVAL;
 847
 848         depth = ntohl(ntq->depth);
 849
 850         if (depth > 4)
 851                 depth = 4;
 852         for (i = 0; i < depth; i++)
 853                 tipc_tlv_sprintf(msg->rep, header[i]);
 854         tipc_tlv_sprintf(msg->rep, "\n");
 855
 856         return 0;
 857 }
 858
 859 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
 860                                           struct nlattr **attrs)
 861 {
 862         char port_str[27];
 863         struct tipc_name_table_query *ntq;
 864         struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
 865         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
 866         u32 node, depth, type, lowbound, upbound;
 867         static const char * const scope_str[] = {"", " zone", " cluster",
 868                                                  " node"};
 869         int err;
 870
 871         if (!attrs[TIPC_NLA_NAME_TABLE])
 872                 return -EINVAL;
 873
 874         err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX,
 875                                           attrs[TIPC_NLA_NAME_TABLE], NULL,
 876                                           NULL);
 877         if (err)
 878                 return err;
 879
 880         if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
 881                 return -EINVAL;
 882
 883         err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
 884                                           nt[TIPC_NLA_NAME_TABLE_PUBL], NULL,
 885                                           NULL);
 886         if (err)
 887                 return err;
 888
 889         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
 890
 891         depth = ntohl(ntq->depth);
 892         type = ntohl(ntq->type);
 893         lowbound = ntohl(ntq->lowbound);
 894         upbound = ntohl(ntq->upbound);
 895
 896         if (!(depth & TIPC_NTQ_ALLTYPES) &&
 897             (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
 898                 return 0;
 899         if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
 900                 return 0;
 901         if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
 902                 return 0;
 903
 904         tipc_tlv_sprintf(msg->rep, "%-10u ",
 905                          nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
 906
 907         if (depth == 1)
 908                 goto out;
 909
 910         tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
 911                          nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
 912                          nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
 913
 914         if (depth == 2)
 915                 goto out;
 916
 917         node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
 918         sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
 919                 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
 920         tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
 921
 922         if (depth == 3)
 923                 goto out;
 924
 925         tipc_tlv_sprintf(msg->rep, "%-10u %s",
 926                          nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
 927                          scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
 928 out:
 929         tipc_tlv_sprintf(msg->rep, "\n");
 930
 931         return 0;
 932 }
 933
 934 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
 935                                       struct nlattr **attrs)
 936 {
 937         u32 type, lower, upper;
 938         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
 939         int err;
 940
 941         if (!attrs[TIPC_NLA_PUBL])
 942                 return -EINVAL;
 943
 944         err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
 945                                           attrs[TIPC_NLA_PUBL], NULL, NULL);
 946         if (err)
 947                 return err;
 948
 949         type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
 950         lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
 951         upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
 952
 953         if (lower == upper)
 954                 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
 955         else
 956                 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
 957
 958         return 0;
 959 }
 960
 961 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
 962 {
 963         int err;
 964         void *hdr;
 965         struct nlattr *nest;
 966         struct sk_buff *args;
 967         struct tipc_nl_compat_cmd_dump dump;
 968
 969         args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 970         if (!args)
 971                 return -ENOMEM;
 972
 973         hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
 974                           TIPC_NL_PUBL_GET);
 975         if (!hdr) {
 976                 kfree_skb(args);
 977                 return -EMSGSIZE;
 978         }
 979
 980         nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK);
 981         if (!nest) {
 982                 kfree_skb(args);
 983                 return -EMSGSIZE;
 984         }
 985
 986         if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
 987                 kfree_skb(args);
 988                 return -EMSGSIZE;
 989         }
 990
 991         nla_nest_end(args, nest);
 992         genlmsg_end(args, hdr);
 993
 994         dump.dumpit = tipc_nl_publ_dump;
 995         dump.format = __tipc_nl_compat_publ_dump;
 996
 997         err = __tipc_nl_compat_dumpit(&dump, msg, args);
 998
 999         kfree_skb(args);
1000
1001         return err;
1002 }
1003
1004 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
1005                                   struct nlattr **attrs)
1006 {
1007         int err;
1008         u32 sock_ref;
1009         struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
1010
1011         if (!attrs[TIPC_NLA_SOCK])
1012                 return -EINVAL;
1013
1014         err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
1015                                           attrs[TIPC_NLA_SOCK], NULL, NULL);
1016         if (err)
1017                 return err;
1018
1019         sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1020         tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1021
1022         if (sock[TIPC_NLA_SOCK_CON]) {
1023                 u32 node;
1024                 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1025
1026                 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX,
1027                                                   sock[TIPC_NLA_SOCK_CON],
1028                                                   NULL, NULL);
1029
1030                 if (err)
1031                         return err;
1032
1033                 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1034                 tipc_tlv_sprintf(msg->rep, "  connected to <%u.%u.%u:%u>",
1035                                  tipc_zone(node),
1036                                  tipc_cluster(node),
1037                                  tipc_node(node),
1038                                  nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1039
1040                 if (con[TIPC_NLA_CON_FLAG])
1041                         tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1042                                          nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1043                                          nla_get_u32(con[TIPC_NLA_CON_INST]));
1044                 else
1045                         tipc_tlv_sprintf(msg->rep, "\n");
1046         } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1047                 tipc_tlv_sprintf(msg->rep, " bound to");
1048
1049                 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1050                 if (err)
1051                         return err;
1052         }
1053         tipc_tlv_sprintf(msg->rep, "\n");
1054
1055         return 0;
1056 }
1057
1058 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1059                                      struct nlattr **attrs)
1060 {
1061         struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1062         int err;
1063
1064         if (!attrs[TIPC_NLA_MEDIA])
1065                 return -EINVAL;
1066
1067         err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX,
1068                                           attrs[TIPC_NLA_MEDIA], NULL, NULL);
1069         if (err)
1070                 return err;
1071
1072         return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1073                             nla_data(media[TIPC_NLA_MEDIA_NAME]),
1074                             nla_len(media[TIPC_NLA_MEDIA_NAME]));
1075 }
1076
1077 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1078                                     struct nlattr **attrs)
1079 {
1080         struct tipc_node_info node_info;
1081         struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1082         int err;
1083
1084         if (!attrs[TIPC_NLA_NODE])
1085                 return -EINVAL;
1086
1087         err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX,
1088                                           attrs[TIPC_NLA_NODE], NULL, NULL);
1089         if (err)
1090                 return err;
1091
1092         node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1093         node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1094
1095         return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1096                             sizeof(node_info));
1097 }
1098
1099 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1100                                   struct sk_buff *skb,
1101                                   struct tipc_nl_compat_msg *msg)
1102 {
1103         u32 val;
1104         struct nlattr *net;
1105
1106         val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1107
1108         net = nla_nest_start_noflag(skb, TIPC_NLA_NET);
1109         if (!net)
1110                 return -EMSGSIZE;
1111
1112         if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1113                 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1114                         return -EMSGSIZE;
1115         } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1116                 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1117                         return -EMSGSIZE;
1118         }
1119         nla_nest_end(skb, net);
1120
1121         return 0;
1122 }
1123
1124 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1125                                    struct nlattr **attrs)
1126 {
1127         __be32 id;
1128         struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1129         int err;
1130
1131         if (!attrs[TIPC_NLA_NET])
1132                 return -EINVAL;
1133
1134         err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX,
1135                                           attrs[TIPC_NLA_NET], NULL, NULL);
1136         if (err)
1137                 return err;
1138
1139         id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1140
1141         return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1142 }
1143
1144 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1145 {
1146         msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1147         if (!msg->rep)
1148                 return -ENOMEM;
1149
1150         tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1151         tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1152
1153         return 0;
1154 }
1155
1156 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1157 {
1158         struct tipc_nl_compat_cmd_dump dump;
1159         struct tipc_nl_compat_cmd_doit doit;
1160
1161         memset(&dump, 0, sizeof(dump));
1162         memset(&doit, 0, sizeof(doit));
1163
1164         switch (msg->cmd) {
1165         case TIPC_CMD_NOOP:
1166                 msg->rep = tipc_tlv_alloc(0);
1167                 if (!msg->rep)
1168                         return -ENOMEM;
1169                 return 0;
1170         case TIPC_CMD_GET_BEARER_NAMES:
1171                 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1172                 dump.dumpit = tipc_nl_bearer_dump;
1173                 dump.format = tipc_nl_compat_bearer_dump;
1174                 return tipc_nl_compat_dumpit(&dump, msg);
1175         case TIPC_CMD_ENABLE_BEARER:
1176                 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1177                 doit.doit = __tipc_nl_bearer_enable;
1178                 doit.transcode = tipc_nl_compat_bearer_enable;
1179                 return tipc_nl_compat_doit(&doit, msg);
1180         case TIPC_CMD_DISABLE_BEARER:
1181                 msg->req_type = TIPC_TLV_BEARER_NAME;
1182                 doit.doit = __tipc_nl_bearer_disable;
1183                 doit.transcode = tipc_nl_compat_bearer_disable;
1184                 return tipc_nl_compat_doit(&doit, msg);
1185         case TIPC_CMD_SHOW_LINK_STATS:
1186                 msg->req_type = TIPC_TLV_LINK_NAME;
1187                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1188                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1189                 dump.dumpit = tipc_nl_node_dump_link;
1190                 dump.format = tipc_nl_compat_link_stat_dump;
1191                 return tipc_nl_compat_dumpit(&dump, msg);
1192         case TIPC_CMD_GET_LINKS:
1193                 msg->req_type = TIPC_TLV_NET_ADDR;
1194                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1195                 dump.dumpit = tipc_nl_node_dump_link;
1196                 dump.format = tipc_nl_compat_link_dump;
1197                 return tipc_nl_compat_dumpit(&dump, msg);
1198         case TIPC_CMD_SET_LINK_TOL:
1199         case TIPC_CMD_SET_LINK_PRI:
1200         case TIPC_CMD_SET_LINK_WINDOW:
1201                 msg->req_type =  TIPC_TLV_LINK_CONFIG;
1202                 doit.doit = tipc_nl_node_set_link;
1203                 doit.transcode = tipc_nl_compat_link_set;
1204                 return tipc_nl_compat_doit(&doit, msg);
1205         case TIPC_CMD_RESET_LINK_STATS:
1206                 msg->req_type = TIPC_TLV_LINK_NAME;
1207                 doit.doit = tipc_nl_node_reset_link_stats;
1208                 doit.transcode = tipc_nl_compat_link_reset_stats;
1209                 return tipc_nl_compat_doit(&doit, msg);
1210         case TIPC_CMD_SHOW_NAME_TABLE:
1211                 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1212                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1213                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1214                 dump.header = tipc_nl_compat_name_table_dump_header;
1215                 dump.dumpit = tipc_nl_name_table_dump;
1216                 dump.format = tipc_nl_compat_name_table_dump;
1217                 return tipc_nl_compat_dumpit(&dump, msg);
1218         case TIPC_CMD_SHOW_PORTS:
1219                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1220                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1221                 dump.dumpit = tipc_nl_sk_dump;
1222                 dump.format = tipc_nl_compat_sk_dump;
1223                 return tipc_nl_compat_dumpit(&dump, msg);
1224         case TIPC_CMD_GET_MEDIA_NAMES:
1225                 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1226                 dump.dumpit = tipc_nl_media_dump;
1227                 dump.format = tipc_nl_compat_media_dump;
1228                 return tipc_nl_compat_dumpit(&dump, msg);
1229         case TIPC_CMD_GET_NODES:
1230                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1231                 dump.dumpit = tipc_nl_node_dump;
1232                 dump.format = tipc_nl_compat_node_dump;
1233                 return tipc_nl_compat_dumpit(&dump, msg);
1234         case TIPC_CMD_SET_NODE_ADDR:
1235                 msg->req_type = TIPC_TLV_NET_ADDR;
1236                 doit.doit = __tipc_nl_net_set;
1237                 doit.transcode = tipc_nl_compat_net_set;
1238                 return tipc_nl_compat_doit(&doit, msg);
1239         case TIPC_CMD_SET_NETID:
1240                 msg->req_type = TIPC_TLV_UNSIGNED;
1241                 doit.doit = __tipc_nl_net_set;
1242                 doit.transcode = tipc_nl_compat_net_set;
1243                 return tipc_nl_compat_doit(&doit, msg);
1244         case TIPC_CMD_GET_NETID:
1245                 msg->rep_size = sizeof(u32);
1246                 dump.dumpit = tipc_nl_net_dump;
1247                 dump.format = tipc_nl_compat_net_dump;
1248                 return tipc_nl_compat_dumpit(&dump, msg);
1249         case TIPC_CMD_SHOW_STATS:
1250                 return tipc_cmd_show_stats_compat(msg);
1251         }
1252
1253         return -EOPNOTSUPP;
1254 }
1255
1256 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1257 {
1258         int err;
1259         int len;
1260         struct tipc_nl_compat_msg msg;
1261         struct nlmsghdr *req_nlh;
1262         struct nlmsghdr *rep_nlh;
1263         struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1264
1265         memset(&msg, 0, sizeof(msg));
1266
1267         req_nlh = (struct nlmsghdr *)skb->data;
1268         msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1269         msg.cmd = req_userhdr->cmd;
1270         msg.net = genl_info_net(info);
1271         msg.dst_sk = skb->sk;
1272
1273         if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1274                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1275                 err = -EACCES;
1276                 goto send;
1277         }
1278
1279         len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1280         if (!len || !TLV_OK(msg.req, len)) {
1281                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1282                 err = -EOPNOTSUPP;
1283                 goto send;
1284         }
1285
1286         err = tipc_nl_compat_handle(&msg);
1287         if ((err == -EOPNOTSUPP) || (err == -EPERM))
1288                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1289         else if (err == -EINVAL)
1290                 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1291 send:
1292         if (!msg.rep)
1293                 return err;
1294
1295         len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1296         skb_push(msg.rep, len);
1297         rep_nlh = nlmsg_hdr(msg.rep);
1298         memcpy(rep_nlh, info->nlhdr, len);
1299         rep_nlh->nlmsg_len = msg.rep->len;
1300         genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1301
1302         return err;
1303 }
1304
1305 static const struct genl_ops tipc_genl_compat_ops[] = {
1306         {
1307                 .cmd            = TIPC_GENL_CMD,
1308                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1309                 .doit           = tipc_nl_compat_recv,
1310         },
1311 };
1312
1313 static struct genl_family tipc_genl_compat_family __ro_after_init = {
1314         .name           = TIPC_GENL_NAME,
1315         .version        = TIPC_GENL_VERSION,
1316         .hdrsize        = TIPC_GENL_HDRLEN,
1317         .maxattr        = 0,
1318         .netnsok        = true,
1319         .module         = THIS_MODULE,
1320         .ops            = tipc_genl_compat_ops,
1321         .n_ops          = ARRAY_SIZE(tipc_genl_compat_ops),
1322 };
1323
1324 int __init tipc_netlink_compat_start(void)
1325 {
1326         int res;
1327
1328         res = genl_register_family(&tipc_genl_compat_family);
1329         if (res) {
1330                 pr_err("Failed to register legacy compat interface\n");
1331                 return res;
1332         }
1333
1334         return 0;
1335 }
1336
1337 void tipc_netlink_compat_stop(void)
1338 {
1339         genl_unregister_family(&tipc_genl_compat_family);
1340 }