net/bridge/br_sysfs_br.c

   1 /*
   2  *      Sysfs attributes of bridge
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Stephen Hemminger               <shemminger@osdl.org>
   7  *
   8  *      This program is free software; you can redistribute it and/or
   9  *      modify it under the terms of the GNU General Public License
  10  *      as published by the Free Software Foundation; either version
  11  *      2 of the License, or (at your option) any later version.
  12  */
  13
  14 #include <linux/capability.h>
  15 #include <linux/kernel.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/if_bridge.h>
  19 #include <linux/rtnetlink.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/times.h>
  22
  23 #include "br_private.h"
  24
  25 #define to_bridge(cd)   ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
  26
  27 /*
  28  * Common code for storing bridge parameters.
  29  */
  30 static ssize_t store_bridge_parm(struct device *d,
  31                                  const char *buf, size_t len,
  32                                  int (*set)(struct net_bridge *, unsigned long))
  33 {
  34         struct net_bridge *br = to_bridge(d);
  35         char *endp;
  36         unsigned long val;
  37         int err;
  38
  39         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
  40                 return -EPERM;
  41
  42         val = simple_strtoul(buf, &endp, 0);
  43         if (endp == buf)
  44                 return -EINVAL;
  45
  46         err = (*set)(br, val);
  47         return err ? err : len;
  48 }
  49
  50
  51 static ssize_t forward_delay_show(struct device *d,
  52                                   struct device_attribute *attr, char *buf)
  53 {
  54         struct net_bridge *br = to_bridge(d);
  55         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
  56 }
  57
  58 static ssize_t forward_delay_store(struct device *d,
  59                                    struct device_attribute *attr,
  60                                    const char *buf, size_t len)
  61 {
  62         return store_bridge_parm(d, buf, len, br_set_forward_delay);
  63 }
  64 static DEVICE_ATTR_RW(forward_delay);
  65
  66 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
  67                                char *buf)
  68 {
  69         return sprintf(buf, "%lu\n",
  70                        jiffies_to_clock_t(to_bridge(d)->hello_time));
  71 }
  72
  73 static ssize_t hello_time_store(struct device *d,
  74                                 struct device_attribute *attr, const char *buf,
  75                                 size_t len)
  76 {
  77         return store_bridge_parm(d, buf, len, br_set_hello_time);
  78 }
  79 static DEVICE_ATTR_RW(hello_time);
  80
  81 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
  82                             char *buf)
  83 {
  84         return sprintf(buf, "%lu\n",
  85                        jiffies_to_clock_t(to_bridge(d)->max_age));
  86 }
  87
  88 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
  89                              const char *buf, size_t len)
  90 {
  91         return store_bridge_parm(d, buf, len, br_set_max_age);
  92 }
  93 static DEVICE_ATTR_RW(max_age);
  94
  95 static ssize_t ageing_time_show(struct device *d,
  96                                 struct device_attribute *attr, char *buf)
  97 {
  98         struct net_bridge *br = to_bridge(d);
  99         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 100 }
 101
 102 static int set_ageing_time(struct net_bridge *br, unsigned long val)
 103 {
 104         int ret;
 105
 106         if (!rtnl_trylock())
 107                 return restart_syscall();
 108
 109         ret = br_set_ageing_time(br, val);
 110         rtnl_unlock();
 111
 112         return ret;
 113 }
 114
 115 static ssize_t ageing_time_store(struct device *d,
 116                                  struct device_attribute *attr,
 117                                  const char *buf, size_t len)
 118 {
 119         return store_bridge_parm(d, buf, len, set_ageing_time);
 120 }
 121 static DEVICE_ATTR_RW(ageing_time);
 122
 123 static ssize_t stp_state_show(struct device *d,
 124                               struct device_attribute *attr, char *buf)
 125 {
 126         struct net_bridge *br = to_bridge(d);
 127         return sprintf(buf, "%d\n", br->stp_enabled);
 128 }
 129
 130
 131 static ssize_t stp_state_store(struct device *d,
 132                                struct device_attribute *attr, const char *buf,
 133                                size_t len)
 134 {
 135         struct net_bridge *br = to_bridge(d);
 136         char *endp;
 137         unsigned long val;
 138
 139         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 140                 return -EPERM;
 141
 142         val = simple_strtoul(buf, &endp, 0);
 143         if (endp == buf)
 144                 return -EINVAL;
 145
 146         if (!rtnl_trylock())
 147                 return restart_syscall();
 148         br_stp_set_enabled(br, val);
 149         rtnl_unlock();
 150
 151         return len;
 152 }
 153 static DEVICE_ATTR_RW(stp_state);
 154
 155 static ssize_t group_fwd_mask_show(struct device *d,
 156                                    struct device_attribute *attr,
 157                                    char *buf)
 158 {
 159         struct net_bridge *br = to_bridge(d);
 160         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 161 }
 162
 163
 164 static ssize_t group_fwd_mask_store(struct device *d,
 165                                     struct device_attribute *attr,
 166                                     const char *buf,
 167                                     size_t len)
 168 {
 169         struct net_bridge *br = to_bridge(d);
 170         char *endp;
 171         unsigned long val;
 172
 173         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 174                 return -EPERM;
 175
 176         val = simple_strtoul(buf, &endp, 0);
 177         if (endp == buf)
 178                 return -EINVAL;
 179
 180         if (val & BR_GROUPFWD_RESTRICTED)
 181                 return -EINVAL;
 182
 183         br->group_fwd_mask = val;
 184
 185         return len;
 186 }
 187 static DEVICE_ATTR_RW(group_fwd_mask);
 188
 189 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
 190                              char *buf)
 191 {
 192         struct net_bridge *br = to_bridge(d);
 193         return sprintf(buf, "%d\n",
 194                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 195 }
 196
 197 static int set_priority(struct net_bridge *br, unsigned long val)
 198 {
 199         br_stp_set_bridge_priority(br, (u16) val);
 200         return 0;
 201 }
 202
 203 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
 204                               const char *buf, size_t len)
 205 {
 206         return store_bridge_parm(d, buf, len, set_priority);
 207 }
 208 static DEVICE_ATTR_RW(priority);
 209
 210 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
 211                             char *buf)
 212 {
 213         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 214 }
 215 static DEVICE_ATTR_RO(root_id);
 216
 217 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
 218                               char *buf)
 219 {
 220         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 221 }
 222 static DEVICE_ATTR_RO(bridge_id);
 223
 224 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
 225                               char *buf)
 226 {
 227         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 228 }
 229 static DEVICE_ATTR_RO(root_port);
 230
 231 static ssize_t root_path_cost_show(struct device *d,
 232                                    struct device_attribute *attr, char *buf)
 233 {
 234         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 235 }
 236 static DEVICE_ATTR_RO(root_path_cost);
 237
 238 static ssize_t topology_change_show(struct device *d,
 239                                     struct device_attribute *attr, char *buf)
 240 {
 241         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 242 }
 243 static DEVICE_ATTR_RO(topology_change);
 244
 245 static ssize_t topology_change_detected_show(struct device *d,
 246                                              struct device_attribute *attr,
 247                                              char *buf)
 248 {
 249         struct net_bridge *br = to_bridge(d);
 250         return sprintf(buf, "%d\n", br->topology_change_detected);
 251 }
 252 static DEVICE_ATTR_RO(topology_change_detected);
 253
 254 static ssize_t hello_timer_show(struct device *d,
 255                                 struct device_attribute *attr, char *buf)
 256 {
 257         struct net_bridge *br = to_bridge(d);
 258         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 259 }
 260 static DEVICE_ATTR_RO(hello_timer);
 261
 262 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
 263                               char *buf)
 264 {
 265         struct net_bridge *br = to_bridge(d);
 266         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 267 }
 268 static DEVICE_ATTR_RO(tcn_timer);
 269
 270 static ssize_t topology_change_timer_show(struct device *d,
 271                                           struct device_attribute *attr,
 272                                           char *buf)
 273 {
 274         struct net_bridge *br = to_bridge(d);
 275         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 276 }
 277 static DEVICE_ATTR_RO(topology_change_timer);
 278
 279 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
 280                              char *buf)
 281 {
 282         struct net_bridge *br = to_bridge(d);
 283         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
 284 }
 285 static DEVICE_ATTR_RO(gc_timer);
 286
 287 static ssize_t group_addr_show(struct device *d,
 288                                struct device_attribute *attr, char *buf)
 289 {
 290         struct net_bridge *br = to_bridge(d);
 291         return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
 292                        br->group_addr[0], br->group_addr[1],
 293                        br->group_addr[2], br->group_addr[3],
 294                        br->group_addr[4], br->group_addr[5]);
 295 }
 296
 297 static ssize_t group_addr_store(struct device *d,
 298                                 struct device_attribute *attr,
 299                                 const char *buf, size_t len)
 300 {
 301         struct net_bridge *br = to_bridge(d);
 302         u8 new_addr[6];
 303         int i;
 304
 305         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 306                 return -EPERM;
 307
 308         if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
 309                    &new_addr[0], &new_addr[1], &new_addr[2],
 310                    &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
 311                 return -EINVAL;
 312
 313         if (!is_link_local_ether_addr(new_addr))
 314                 return -EINVAL;
 315
 316         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 317             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 318             new_addr[5] == 3)           /* 802.1X PAE address */
 319                 return -EINVAL;
 320
 321         if (!rtnl_trylock())
 322                 return restart_syscall();
 323
 324         spin_lock_bh(&br->lock);
 325         for (i = 0; i < 6; i++)
 326                 br->group_addr[i] = new_addr[i];
 327         spin_unlock_bh(&br->lock);
 328
 329         br->group_addr_set = true;
 330         br_recalculate_fwd_mask(br);
 331
 332         rtnl_unlock();
 333
 334         return len;
 335 }
 336
 337 static DEVICE_ATTR_RW(group_addr);
 338
 339 static ssize_t flush_store(struct device *d,
 340                            struct device_attribute *attr,
 341                            const char *buf, size_t len)
 342 {
 343         struct net_bridge *br = to_bridge(d);
 344
 345         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 346                 return -EPERM;
 347
 348         br_fdb_flush(br);
 349         return len;
 350 }
 351 static DEVICE_ATTR_WO(flush);
 352
 353 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 354 static ssize_t multicast_router_show(struct device *d,
 355                                      struct device_attribute *attr, char *buf)
 356 {
 357         struct net_bridge *br = to_bridge(d);
 358         return sprintf(buf, "%d\n", br->multicast_router);
 359 }
 360
 361 static ssize_t multicast_router_store(struct device *d,
 362                                       struct device_attribute *attr,
 363                                       const char *buf, size_t len)
 364 {
 365         return store_bridge_parm(d, buf, len, br_multicast_set_router);
 366 }
 367 static DEVICE_ATTR_RW(multicast_router);
 368
 369 static ssize_t multicast_snooping_show(struct device *d,
 370                                        struct device_attribute *attr,
 371                                        char *buf)
 372 {
 373         struct net_bridge *br = to_bridge(d);
 374         return sprintf(buf, "%d\n", !br->multicast_disabled);
 375 }
 376
 377 static ssize_t multicast_snooping_store(struct device *d,
 378                                         struct device_attribute *attr,
 379                                         const char *buf, size_t len)
 380 {
 381         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 382 }
 383 static DEVICE_ATTR_RW(multicast_snooping);
 384
 385 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
 386                                                struct device_attribute *attr,
 387                                                char *buf)
 388 {
 389         struct net_bridge *br = to_bridge(d);
 390         return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr);
 391 }
 392
 393 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
 394 {
 395         br->multicast_query_use_ifaddr = !!val;
 396         return 0;
 397 }
 398
 399 static ssize_t
 400 multicast_query_use_ifaddr_store(struct device *d,
 401                                  struct device_attribute *attr,
 402                                  const char *buf, size_t len)
 403 {
 404         return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
 405 }
 406 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
 407
 408 static ssize_t multicast_querier_show(struct device *d,
 409                                       struct device_attribute *attr,
 410                                       char *buf)
 411 {
 412         struct net_bridge *br = to_bridge(d);
 413         return sprintf(buf, "%d\n", br->multicast_querier);
 414 }
 415
 416 static ssize_t multicast_querier_store(struct device *d,
 417                                        struct device_attribute *attr,
 418                                        const char *buf, size_t len)
 419 {
 420         return store_bridge_parm(d, buf, len, br_multicast_set_querier);
 421 }
 422 static DEVICE_ATTR_RW(multicast_querier);
 423
 424 static ssize_t hash_elasticity_show(struct device *d,
 425                                     struct device_attribute *attr, char *buf)
 426 {
 427         struct net_bridge *br = to_bridge(d);
 428         return sprintf(buf, "%u\n", br->hash_elasticity);
 429 }
 430
 431 static int set_elasticity(struct net_bridge *br, unsigned long val)
 432 {
 433         br->hash_elasticity = val;
 434         return 0;
 435 }
 436
 437 static ssize_t hash_elasticity_store(struct device *d,
 438                                      struct device_attribute *attr,
 439                                      const char *buf, size_t len)
 440 {
 441         return store_bridge_parm(d, buf, len, set_elasticity);
 442 }
 443 static DEVICE_ATTR_RW(hash_elasticity);
 444
 445 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
 446                              char *buf)
 447 {
 448         struct net_bridge *br = to_bridge(d);
 449         return sprintf(buf, "%u\n", br->hash_max);
 450 }
 451
 452 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
 453                               const char *buf, size_t len)
 454 {
 455         return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
 456 }
 457 static DEVICE_ATTR_RW(hash_max);
 458
 459 static ssize_t multicast_last_member_count_show(struct device *d,
 460                                                 struct device_attribute *attr,
 461                                                 char *buf)
 462 {
 463         struct net_bridge *br = to_bridge(d);
 464         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 465 }
 466
 467 static int set_last_member_count(struct net_bridge *br, unsigned long val)
 468 {
 469         br->multicast_last_member_count = val;
 470         return 0;
 471 }
 472
 473 static ssize_t multicast_last_member_count_store(struct device *d,
 474                                                  struct device_attribute *attr,
 475                                                  const char *buf, size_t len)
 476 {
 477         return store_bridge_parm(d, buf, len, set_last_member_count);
 478 }
 479 static DEVICE_ATTR_RW(multicast_last_member_count);
 480
 481 static ssize_t multicast_startup_query_count_show(
 482         struct device *d, struct device_attribute *attr, char *buf)
 483 {
 484         struct net_bridge *br = to_bridge(d);
 485         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 486 }
 487
 488 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
 489 {
 490         br->multicast_startup_query_count = val;
 491         return 0;
 492 }
 493
 494 static ssize_t multicast_startup_query_count_store(
 495         struct device *d, struct device_attribute *attr, const char *buf,
 496         size_t len)
 497 {
 498         return store_bridge_parm(d, buf, len, set_startup_query_count);
 499 }
 500 static DEVICE_ATTR_RW(multicast_startup_query_count);
 501
 502 static ssize_t multicast_last_member_interval_show(
 503         struct device *d, struct device_attribute *attr, char *buf)
 504 {
 505         struct net_bridge *br = to_bridge(d);
 506         return sprintf(buf, "%lu\n",
 507                        jiffies_to_clock_t(br->multicast_last_member_interval));
 508 }
 509
 510 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
 511 {
 512         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 513         return 0;
 514 }
 515
 516 static ssize_t multicast_last_member_interval_store(
 517         struct device *d, struct device_attribute *attr, const char *buf,
 518         size_t len)
 519 {
 520         return store_bridge_parm(d, buf, len, set_last_member_interval);
 521 }
 522 static DEVICE_ATTR_RW(multicast_last_member_interval);
 523
 524 static ssize_t multicast_membership_interval_show(
 525         struct device *d, struct device_attribute *attr, char *buf)
 526 {
 527         struct net_bridge *br = to_bridge(d);
 528         return sprintf(buf, "%lu\n",
 529                        jiffies_to_clock_t(br->multicast_membership_interval));
 530 }
 531
 532 static int set_membership_interval(struct net_bridge *br, unsigned long val)
 533 {
 534         br->multicast_membership_interval = clock_t_to_jiffies(val);
 535         return 0;
 536 }
 537
 538 static ssize_t multicast_membership_interval_store(
 539         struct device *d, struct device_attribute *attr, const char *buf,
 540         size_t len)
 541 {
 542         return store_bridge_parm(d, buf, len, set_membership_interval);
 543 }
 544 static DEVICE_ATTR_RW(multicast_membership_interval);
 545
 546 static ssize_t multicast_querier_interval_show(struct device *d,
 547                                                struct device_attribute *attr,
 548                                                char *buf)
 549 {
 550         struct net_bridge *br = to_bridge(d);
 551         return sprintf(buf, "%lu\n",
 552                        jiffies_to_clock_t(br->multicast_querier_interval));
 553 }
 554
 555 static int set_querier_interval(struct net_bridge *br, unsigned long val)
 556 {
 557         br->multicast_querier_interval = clock_t_to_jiffies(val);
 558         return 0;
 559 }
 560
 561 static ssize_t multicast_querier_interval_store(struct device *d,
 562                                                 struct device_attribute *attr,
 563                                                 const char *buf, size_t len)
 564 {
 565         return store_bridge_parm(d, buf, len, set_querier_interval);
 566 }
 567 static DEVICE_ATTR_RW(multicast_querier_interval);
 568
 569 static ssize_t multicast_query_interval_show(struct device *d,
 570                                              struct device_attribute *attr,
 571                                              char *buf)
 572 {
 573         struct net_bridge *br = to_bridge(d);
 574         return sprintf(buf, "%lu\n",
 575                        jiffies_to_clock_t(br->multicast_query_interval));
 576 }
 577
 578 static int set_query_interval(struct net_bridge *br, unsigned long val)
 579 {
 580         br->multicast_query_interval = clock_t_to_jiffies(val);
 581         return 0;
 582 }
 583
 584 static ssize_t multicast_query_interval_store(struct device *d,
 585                                               struct device_attribute *attr,
 586                                               const char *buf, size_t len)
 587 {
 588         return store_bridge_parm(d, buf, len, set_query_interval);
 589 }
 590 static DEVICE_ATTR_RW(multicast_query_interval);
 591
 592 static ssize_t multicast_query_response_interval_show(
 593         struct device *d, struct device_attribute *attr, char *buf)
 594 {
 595         struct net_bridge *br = to_bridge(d);
 596         return sprintf(
 597                 buf, "%lu\n",
 598                 jiffies_to_clock_t(br->multicast_query_response_interval));
 599 }
 600
 601 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
 602 {
 603         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 604         return 0;
 605 }
 606
 607 static ssize_t multicast_query_response_interval_store(
 608         struct device *d, struct device_attribute *attr, const char *buf,
 609         size_t len)
 610 {
 611         return store_bridge_parm(d, buf, len, set_query_response_interval);
 612 }
 613 static DEVICE_ATTR_RW(multicast_query_response_interval);
 614
 615 static ssize_t multicast_startup_query_interval_show(
 616         struct device *d, struct device_attribute *attr, char *buf)
 617 {
 618         struct net_bridge *br = to_bridge(d);
 619         return sprintf(
 620                 buf, "%lu\n",
 621                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 622 }
 623
 624 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
 625 {
 626         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 627         return 0;
 628 }
 629
 630 static ssize_t multicast_startup_query_interval_store(
 631         struct device *d, struct device_attribute *attr, const char *buf,
 632         size_t len)
 633 {
 634         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 635 }
 636 static DEVICE_ATTR_RW(multicast_startup_query_interval);
 637 #endif
 638 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 639 static ssize_t nf_call_iptables_show(
 640         struct device *d, struct device_attribute *attr, char *buf)
 641 {
 642         struct net_bridge *br = to_bridge(d);
 643         return sprintf(buf, "%u\n", br->nf_call_iptables);
 644 }
 645
 646 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
 647 {
 648         br->nf_call_iptables = val ? true : false;
 649         return 0;
 650 }
 651
 652 static ssize_t nf_call_iptables_store(
 653         struct device *d, struct device_attribute *attr, const char *buf,
 654         size_t len)
 655 {
 656         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 657 }
 658 static DEVICE_ATTR_RW(nf_call_iptables);
 659
 660 static ssize_t nf_call_ip6tables_show(
 661         struct device *d, struct device_attribute *attr, char *buf)
 662 {
 663         struct net_bridge *br = to_bridge(d);
 664         return sprintf(buf, "%u\n", br->nf_call_ip6tables);
 665 }
 666
 667 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
 668 {
 669         br->nf_call_ip6tables = val ? true : false;
 670         return 0;
 671 }
 672
 673 static ssize_t nf_call_ip6tables_store(
 674         struct device *d, struct device_attribute *attr, const char *buf,
 675         size_t len)
 676 {
 677         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 678 }
 679 static DEVICE_ATTR_RW(nf_call_ip6tables);
 680
 681 static ssize_t nf_call_arptables_show(
 682         struct device *d, struct device_attribute *attr, char *buf)
 683 {
 684         struct net_bridge *br = to_bridge(d);
 685         return sprintf(buf, "%u\n", br->nf_call_arptables);
 686 }
 687
 688 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
 689 {
 690         br->nf_call_arptables = val ? true : false;
 691         return 0;
 692 }
 693
 694 static ssize_t nf_call_arptables_store(
 695         struct device *d, struct device_attribute *attr, const char *buf,
 696         size_t len)
 697 {
 698         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 699 }
 700 static DEVICE_ATTR_RW(nf_call_arptables);
 701 #endif
 702 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 703 static ssize_t vlan_filtering_show(struct device *d,
 704                                    struct device_attribute *attr,
 705                                    char *buf)
 706 {
 707         struct net_bridge *br = to_bridge(d);
 708         return sprintf(buf, "%d\n", br->vlan_enabled);
 709 }
 710
 711 static ssize_t vlan_filtering_store(struct device *d,
 712                                     struct device_attribute *attr,
 713                                     const char *buf, size_t len)
 714 {
 715         return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
 716 }
 717 static DEVICE_ATTR_RW(vlan_filtering);
 718
 719 static ssize_t vlan_protocol_show(struct device *d,
 720                                   struct device_attribute *attr,
 721                                   char *buf)
 722 {
 723         struct net_bridge *br = to_bridge(d);
 724         return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
 725 }
 726
 727 static ssize_t vlan_protocol_store(struct device *d,
 728                                    struct device_attribute *attr,
 729                                    const char *buf, size_t len)
 730 {
 731         return store_bridge_parm(d, buf, len, br_vlan_set_proto);
 732 }
 733 static DEVICE_ATTR_RW(vlan_protocol);
 734
 735 static ssize_t default_pvid_show(struct device *d,
 736                                  struct device_attribute *attr,
 737                                  char *buf)
 738 {
 739         struct net_bridge *br = to_bridge(d);
 740         return sprintf(buf, "%d\n", br->default_pvid);
 741 }
 742
 743 static ssize_t default_pvid_store(struct device *d,
 744                                   struct device_attribute *attr,
 745                                   const char *buf, size_t len)
 746 {
 747         return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
 748 }
 749 static DEVICE_ATTR_RW(default_pvid);
 750 #endif
 751
 752 static struct attribute *bridge_attrs[] = {
 753         &dev_attr_forward_delay.attr,
 754         &dev_attr_hello_time.attr,
 755         &dev_attr_max_age.attr,
 756         &dev_attr_ageing_time.attr,
 757         &dev_attr_stp_state.attr,
 758         &dev_attr_group_fwd_mask.attr,
 759         &dev_attr_priority.attr,
 760         &dev_attr_bridge_id.attr,
 761         &dev_attr_root_id.attr,
 762         &dev_attr_root_path_cost.attr,
 763         &dev_attr_root_port.attr,
 764         &dev_attr_topology_change.attr,
 765         &dev_attr_topology_change_detected.attr,
 766         &dev_attr_hello_timer.attr,
 767         &dev_attr_tcn_timer.attr,
 768         &dev_attr_topology_change_timer.attr,
 769         &dev_attr_gc_timer.attr,
 770         &dev_attr_group_addr.attr,
 771         &dev_attr_flush.attr,
 772 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 773         &dev_attr_multicast_router.attr,
 774         &dev_attr_multicast_snooping.attr,
 775         &dev_attr_multicast_querier.attr,
 776         &dev_attr_multicast_query_use_ifaddr.attr,
 777         &dev_attr_hash_elasticity.attr,
 778         &dev_attr_hash_max.attr,
 779         &dev_attr_multicast_last_member_count.attr,
 780         &dev_attr_multicast_startup_query_count.attr,
 781         &dev_attr_multicast_last_member_interval.attr,
 782         &dev_attr_multicast_membership_interval.attr,
 783         &dev_attr_multicast_querier_interval.attr,
 784         &dev_attr_multicast_query_interval.attr,
 785         &dev_attr_multicast_query_response_interval.attr,
 786         &dev_attr_multicast_startup_query_interval.attr,
 787 #endif
 788 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 789         &dev_attr_nf_call_iptables.attr,
 790         &dev_attr_nf_call_ip6tables.attr,
 791         &dev_attr_nf_call_arptables.attr,
 792 #endif
 793 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 794         &dev_attr_vlan_filtering.attr,
 795         &dev_attr_vlan_protocol.attr,
 796         &dev_attr_default_pvid.attr,
 797 #endif
 798         NULL
 799 };
 800
 801 static struct attribute_group bridge_group = {
 802         .name = SYSFS_BRIDGE_ATTR,
 803         .attrs = bridge_attrs,
 804 };
 805
 806 /*
 807  * Export the forwarding information table as a binary file
 808  * The records are struct __fdb_entry.
 809  *
 810  * Returns the number of bytes read.
 811  */
 812 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
 813                               struct bin_attribute *bin_attr,
 814                               char *buf, loff_t off, size_t count)
 815 {
 816         struct device *dev = kobj_to_dev(kobj);
 817         struct net_bridge *br = to_bridge(dev);
 818         int n;
 819
 820         /* must read whole records */
 821         if (off % sizeof(struct __fdb_entry) != 0)
 822                 return -EINVAL;
 823
 824         n =  br_fdb_fillbuf(br, buf,
 825                             count / sizeof(struct __fdb_entry),
 826                             off / sizeof(struct __fdb_entry));
 827
 828         if (n > 0)
 829                 n *= sizeof(struct __fdb_entry);
 830
 831         return n;
 832 }
 833
 834 static struct bin_attribute bridge_forward = {
 835         .attr = { .name = SYSFS_BRIDGE_FDB,
 836                   .mode = S_IRUGO, },
 837         .read = brforward_read,
 838 };
 839
 840 /*
 841  * Add entries in sysfs onto the existing network class device
 842  * for the bridge.
 843  *   Adds a attribute group "bridge" containing tuning parameters.
 844  *   Binary attribute containing the forward table
 845  *   Sub directory to hold links to interfaces.
 846  *
 847  * Note: the ifobj exists only to be a subdirectory
 848  *   to hold links.  The ifobj exists in same data structure
 849  *   as it's parent the bridge so reference counting works.
 850  */
 851 int br_sysfs_addbr(struct net_device *dev)
 852 {
 853         struct kobject *brobj = &dev->dev.kobj;
 854         struct net_bridge *br = netdev_priv(dev);
 855         int err;
 856
 857         err = sysfs_create_group(brobj, &bridge_group);
 858         if (err) {
 859                 pr_info("%s: can't create group %s/%s\n",
 860                         __func__, dev->name, bridge_group.name);
 861                 goto out1;
 862         }
 863
 864         err = sysfs_create_bin_file(brobj, &bridge_forward);
 865         if (err) {
 866                 pr_info("%s: can't create attribute file %s/%s\n",
 867                         __func__, dev->name, bridge_forward.attr.name);
 868                 goto out2;
 869         }
 870
 871         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
 872         if (!br->ifobj) {
 873                 pr_info("%s: can't add kobject (directory) %s/%s\n",
 874                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
 875                 goto out3;
 876         }
 877         return 0;
 878  out3:
 879         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
 880  out2:
 881         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
 882  out1:
 883         return err;
 884
 885 }
 886
 887 void br_sysfs_delbr(struct net_device *dev)
 888 {
 889         struct kobject *kobj = &dev->dev.kobj;
 890         struct net_bridge *br = netdev_priv(dev);
 891
 892         kobject_put(br->ifobj);
 893         sysfs_remove_bin_file(kobj, &bridge_forward);
 894         sysfs_remove_group(kobj, &bridge_group);
 895 }