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