net/bridge/br_sysfs_br.c

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