net/bridge/br_sysfs_br.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      Sysfs attributes of bridge
   4  *      Linux ethernet bridge
   5  *
   6  *      Authors:
   7  *      Stephen Hemminger               <shemminger@osdl.org>
   8  */
   9
  10 #include <linux/capability.h>
  11 #include <linux/kernel.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/if_bridge.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/times.h>
  18 #include <linux/sched/signal.h>
  19
  20 #include "br_private.h"
  21
  22 #define to_bridge(cd)   ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
  23
  24 /*
  25  * Common code for storing bridge parameters.
  26  */
  27 static ssize_t store_bridge_parm(struct device *d,
  28                                  const char *buf, size_t len,
  29                                  int (*set)(struct net_bridge *, unsigned long))
  30 {
  31         struct net_bridge *br = to_bridge(d);
  32         char *endp;
  33         unsigned long val;
  34         int err;
  35
  36         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
  37                 return -EPERM;
  38
  39         val = simple_strtoul(buf, &endp, 0);
  40         if (endp == buf)
  41                 return -EINVAL;
  42
  43         if (!rtnl_trylock())
  44                 return restart_syscall();
  45
  46         err = (*set)(br, val);
  47         if (!err)
  48                 netdev_state_change(br->dev);
  49         rtnl_unlock();
  50
  51         return err ? err : len;
  52 }
  53
  54
  55 static ssize_t forward_delay_show(struct device *d,
  56                                   struct device_attribute *attr, char *buf)
  57 {
  58         struct net_bridge *br = to_bridge(d);
  59         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
  60 }
  61
  62 static ssize_t forward_delay_store(struct device *d,
  63                                    struct device_attribute *attr,
  64                                    const char *buf, size_t len)
  65 {
  66         return store_bridge_parm(d, buf, len, br_set_forward_delay);
  67 }
  68 static DEVICE_ATTR_RW(forward_delay);
  69
  70 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
  71                                char *buf)
  72 {
  73         return sprintf(buf, "%lu\n",
  74                        jiffies_to_clock_t(to_bridge(d)->hello_time));
  75 }
  76
  77 static ssize_t hello_time_store(struct device *d,
  78                                 struct device_attribute *attr, const char *buf,
  79                                 size_t len)
  80 {
  81         return store_bridge_parm(d, buf, len, br_set_hello_time);
  82 }
  83 static DEVICE_ATTR_RW(hello_time);
  84
  85 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
  86                             char *buf)
  87 {
  88         return sprintf(buf, "%lu\n",
  89                        jiffies_to_clock_t(to_bridge(d)->max_age));
  90 }
  91
  92 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
  93                              const char *buf, size_t len)
  94 {
  95         return store_bridge_parm(d, buf, len, br_set_max_age);
  96 }
  97 static DEVICE_ATTR_RW(max_age);
  98
  99 static ssize_t ageing_time_show(struct device *d,
 100                                 struct device_attribute *attr, char *buf)
 101 {
 102         struct net_bridge *br = to_bridge(d);
 103         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 104 }
 105
 106 static int set_ageing_time(struct net_bridge *br, unsigned long val)
 107 {
 108         return br_set_ageing_time(br, val);
 109 }
 110
 111 static ssize_t ageing_time_store(struct device *d,
 112                                  struct device_attribute *attr,
 113                                  const char *buf, size_t len)
 114 {
 115         return store_bridge_parm(d, buf, len, set_ageing_time);
 116 }
 117 static DEVICE_ATTR_RW(ageing_time);
 118
 119 static ssize_t stp_state_show(struct device *d,
 120                               struct device_attribute *attr, char *buf)
 121 {
 122         struct net_bridge *br = to_bridge(d);
 123         return sprintf(buf, "%d\n", br->stp_enabled);
 124 }
 125
 126
 127 static int set_stp_state(struct net_bridge *br, unsigned long val)
 128 {
 129         br_stp_set_enabled(br, val);
 130
 131         return 0;
 132 }
 133
 134 static ssize_t stp_state_store(struct device *d,
 135                                struct device_attribute *attr, const char *buf,
 136                                size_t len)
 137 {
 138         return store_bridge_parm(d, buf, len, set_stp_state);
 139 }
 140 static DEVICE_ATTR_RW(stp_state);
 141
 142 static ssize_t group_fwd_mask_show(struct device *d,
 143                                    struct device_attribute *attr,
 144                                    char *buf)
 145 {
 146         struct net_bridge *br = to_bridge(d);
 147         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 148 }
 149
 150 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val)
 151 {
 152         if (val & BR_GROUPFWD_RESTRICTED)
 153                 return -EINVAL;
 154
 155         br->group_fwd_mask = val;
 156
 157         return 0;
 158 }
 159
 160 static ssize_t group_fwd_mask_store(struct device *d,
 161                                     struct device_attribute *attr,
 162                                     const char *buf,
 163                                     size_t len)
 164 {
 165         return store_bridge_parm(d, buf, len, set_group_fwd_mask);
 166 }
 167 static DEVICE_ATTR_RW(group_fwd_mask);
 168
 169 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
 170                              char *buf)
 171 {
 172         struct net_bridge *br = to_bridge(d);
 173         return sprintf(buf, "%d\n",
 174                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 175 }
 176
 177 static int set_priority(struct net_bridge *br, unsigned long val)
 178 {
 179         br_stp_set_bridge_priority(br, (u16) val);
 180         return 0;
 181 }
 182
 183 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
 184                               const char *buf, size_t len)
 185 {
 186         return store_bridge_parm(d, buf, len, set_priority);
 187 }
 188 static DEVICE_ATTR_RW(priority);
 189
 190 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
 191                             char *buf)
 192 {
 193         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 194 }
 195 static DEVICE_ATTR_RO(root_id);
 196
 197 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
 198                               char *buf)
 199 {
 200         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 201 }
 202 static DEVICE_ATTR_RO(bridge_id);
 203
 204 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
 205                               char *buf)
 206 {
 207         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 208 }
 209 static DEVICE_ATTR_RO(root_port);
 210
 211 static ssize_t root_path_cost_show(struct device *d,
 212                                    struct device_attribute *attr, char *buf)
 213 {
 214         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 215 }
 216 static DEVICE_ATTR_RO(root_path_cost);
 217
 218 static ssize_t topology_change_show(struct device *d,
 219                                     struct device_attribute *attr, char *buf)
 220 {
 221         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 222 }
 223 static DEVICE_ATTR_RO(topology_change);
 224
 225 static ssize_t topology_change_detected_show(struct device *d,
 226                                              struct device_attribute *attr,
 227                                              char *buf)
 228 {
 229         struct net_bridge *br = to_bridge(d);
 230         return sprintf(buf, "%d\n", br->topology_change_detected);
 231 }
 232 static DEVICE_ATTR_RO(topology_change_detected);
 233
 234 static ssize_t hello_timer_show(struct device *d,
 235                                 struct device_attribute *attr, char *buf)
 236 {
 237         struct net_bridge *br = to_bridge(d);
 238         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 239 }
 240 static DEVICE_ATTR_RO(hello_timer);
 241
 242 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
 243                               char *buf)
 244 {
 245         struct net_bridge *br = to_bridge(d);
 246         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 247 }
 248 static DEVICE_ATTR_RO(tcn_timer);
 249
 250 static ssize_t topology_change_timer_show(struct device *d,
 251                                           struct device_attribute *attr,
 252                                           char *buf)
 253 {
 254         struct net_bridge *br = to_bridge(d);
 255         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 256 }
 257 static DEVICE_ATTR_RO(topology_change_timer);
 258
 259 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
 260                              char *buf)
 261 {
 262         struct net_bridge *br = to_bridge(d);
 263         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer));
 264 }
 265 static DEVICE_ATTR_RO(gc_timer);
 266
 267 static ssize_t group_addr_show(struct device *d,
 268                                struct device_attribute *attr, char *buf)
 269 {
 270         struct net_bridge *br = to_bridge(d);
 271         return sprintf(buf, "%pM\n", br->group_addr);
 272 }
 273
 274 static ssize_t group_addr_store(struct device *d,
 275                                 struct device_attribute *attr,
 276                                 const char *buf, size_t len)
 277 {
 278         struct net_bridge *br = to_bridge(d);
 279         u8 new_addr[6];
 280
 281         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 282                 return -EPERM;
 283
 284         if (!mac_pton(buf, new_addr))
 285                 return -EINVAL;
 286
 287         if (!is_link_local_ether_addr(new_addr))
 288                 return -EINVAL;
 289
 290         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 291             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 292             new_addr[5] == 3)           /* 802.1X PAE address */
 293                 return -EINVAL;
 294
 295         if (!rtnl_trylock())
 296                 return restart_syscall();
 297
 298         spin_lock_bh(&br->lock);
 299         ether_addr_copy(br->group_addr, new_addr);
 300         spin_unlock_bh(&br->lock);
 301
 302         br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
 303         br_recalculate_fwd_mask(br);
 304         netdev_state_change(br->dev);
 305
 306         rtnl_unlock();
 307
 308         return len;
 309 }
 310
 311 static DEVICE_ATTR_RW(group_addr);
 312
 313 static int set_flush(struct net_bridge *br, unsigned long val)
 314 {
 315         br_fdb_flush(br);
 316         return 0;
 317 }
 318
 319 static ssize_t flush_store(struct device *d,
 320                            struct device_attribute *attr,
 321                            const char *buf, size_t len)
 322 {
 323         return store_bridge_parm(d, buf, len, set_flush);
 324 }
 325 static DEVICE_ATTR_WO(flush);
 326
 327 static ssize_t no_linklocal_learn_show(struct device *d,
 328                                        struct device_attribute *attr,
 329                                        char *buf)
 330 {
 331         struct net_bridge *br = to_bridge(d);
 332         return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN));
 333 }
 334
 335 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val)
 336 {
 337         return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, NULL);
 338 }
 339
 340 static ssize_t no_linklocal_learn_store(struct device *d,
 341                                         struct device_attribute *attr,
 342                                         const char *buf, size_t len)
 343 {
 344         return store_bridge_parm(d, buf, len, set_no_linklocal_learn);
 345 }
 346 static DEVICE_ATTR_RW(no_linklocal_learn);
 347
 348 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 349 static ssize_t multicast_router_show(struct device *d,
 350                                      struct device_attribute *attr, char *buf)
 351 {
 352         struct net_bridge *br = to_bridge(d);
 353         return sprintf(buf, "%d\n", br->multicast_router);
 354 }
 355
 356 static ssize_t multicast_router_store(struct device *d,
 357                                       struct device_attribute *attr,
 358                                       const char *buf, size_t len)
 359 {
 360         return store_bridge_parm(d, buf, len, br_multicast_set_router);
 361 }
 362 static DEVICE_ATTR_RW(multicast_router);
 363
 364 static ssize_t multicast_snooping_show(struct device *d,
 365                                        struct device_attribute *attr,
 366                                        char *buf)
 367 {
 368         struct net_bridge *br = to_bridge(d);
 369         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED));
 370 }
 371
 372 static ssize_t multicast_snooping_store(struct device *d,
 373                                         struct device_attribute *attr,
 374                                         const char *buf, size_t len)
 375 {
 376         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 377 }
 378 static DEVICE_ATTR_RW(multicast_snooping);
 379
 380 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
 381                                                struct device_attribute *attr,
 382                                                char *buf)
 383 {
 384         struct net_bridge *br = to_bridge(d);
 385         return sprintf(buf, "%d\n",
 386                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
 387 }
 388
 389 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
 390 {
 391         br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
 392         return 0;
 393 }
 394
 395 static ssize_t
 396 multicast_query_use_ifaddr_store(struct device *d,
 397                                  struct device_attribute *attr,
 398                                  const char *buf, size_t len)
 399 {
 400         return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
 401 }
 402 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
 403
 404 static ssize_t multicast_querier_show(struct device *d,
 405                                       struct device_attribute *attr,
 406                                       char *buf)
 407 {
 408         struct net_bridge *br = to_bridge(d);
 409         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_QUERIER));
 410 }
 411
 412 static ssize_t multicast_querier_store(struct device *d,
 413                                        struct device_attribute *attr,
 414                                        const char *buf, size_t len)
 415 {
 416         return store_bridge_parm(d, buf, len, br_multicast_set_querier);
 417 }
 418 static DEVICE_ATTR_RW(multicast_querier);
 419
 420 static ssize_t hash_elasticity_show(struct device *d,
 421                                     struct device_attribute *attr, char *buf)
 422 {
 423         return sprintf(buf, "%u\n", RHT_ELASTICITY);
 424 }
 425
 426 static int set_elasticity(struct net_bridge *br, unsigned long val)
 427 {
 428         br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
 429                 RHT_ELASTICITY);
 430         return 0;
 431 }
 432
 433 static ssize_t hash_elasticity_store(struct device *d,
 434                                      struct device_attribute *attr,
 435                                      const char *buf, size_t len)
 436 {
 437         return store_bridge_parm(d, buf, len, set_elasticity);
 438 }
 439 static DEVICE_ATTR_RW(hash_elasticity);
 440
 441 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
 442                              char *buf)
 443 {
 444         struct net_bridge *br = to_bridge(d);
 445         return sprintf(buf, "%u\n", br->hash_max);
 446 }
 447
 448 static int set_hash_max(struct net_bridge *br, unsigned long val)
 449 {
 450         br->hash_max = val;
 451         return 0;
 452 }
 453
 454 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
 455                               const char *buf, size_t len)
 456 {
 457         return store_bridge_parm(d, buf, len, set_hash_max);
 458 }
 459 static DEVICE_ATTR_RW(hash_max);
 460
 461 static ssize_t multicast_igmp_version_show(struct device *d,
 462                                            struct device_attribute *attr,
 463                                            char *buf)
 464 {
 465         struct net_bridge *br = to_bridge(d);
 466
 467         return sprintf(buf, "%u\n", br->multicast_igmp_version);
 468 }
 469
 470 static ssize_t multicast_igmp_version_store(struct device *d,
 471                                             struct device_attribute *attr,
 472                                             const char *buf, size_t len)
 473 {
 474         return store_bridge_parm(d, buf, len, br_multicast_set_igmp_version);
 475 }
 476 static DEVICE_ATTR_RW(multicast_igmp_version);
 477
 478 static ssize_t multicast_last_member_count_show(struct device *d,
 479                                                 struct device_attribute *attr,
 480                                                 char *buf)
 481 {
 482         struct net_bridge *br = to_bridge(d);
 483         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 484 }
 485
 486 static int set_last_member_count(struct net_bridge *br, unsigned long val)
 487 {
 488         br->multicast_last_member_count = val;
 489         return 0;
 490 }
 491
 492 static ssize_t multicast_last_member_count_store(struct device *d,
 493                                                  struct device_attribute *attr,
 494                                                  const char *buf, size_t len)
 495 {
 496         return store_bridge_parm(d, buf, len, set_last_member_count);
 497 }
 498 static DEVICE_ATTR_RW(multicast_last_member_count);
 499
 500 static ssize_t multicast_startup_query_count_show(
 501         struct device *d, struct device_attribute *attr, char *buf)
 502 {
 503         struct net_bridge *br = to_bridge(d);
 504         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 505 }
 506
 507 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
 508 {
 509         br->multicast_startup_query_count = val;
 510         return 0;
 511 }
 512
 513 static ssize_t multicast_startup_query_count_store(
 514         struct device *d, struct device_attribute *attr, const char *buf,
 515         size_t len)
 516 {
 517         return store_bridge_parm(d, buf, len, set_startup_query_count);
 518 }
 519 static DEVICE_ATTR_RW(multicast_startup_query_count);
 520
 521 static ssize_t multicast_last_member_interval_show(
 522         struct device *d, struct device_attribute *attr, char *buf)
 523 {
 524         struct net_bridge *br = to_bridge(d);
 525         return sprintf(buf, "%lu\n",
 526                        jiffies_to_clock_t(br->multicast_last_member_interval));
 527 }
 528
 529 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
 530 {
 531         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 532         return 0;
 533 }
 534
 535 static ssize_t multicast_last_member_interval_store(
 536         struct device *d, struct device_attribute *attr, const char *buf,
 537         size_t len)
 538 {
 539         return store_bridge_parm(d, buf, len, set_last_member_interval);
 540 }
 541 static DEVICE_ATTR_RW(multicast_last_member_interval);
 542
 543 static ssize_t multicast_membership_interval_show(
 544         struct device *d, struct device_attribute *attr, char *buf)
 545 {
 546         struct net_bridge *br = to_bridge(d);
 547         return sprintf(buf, "%lu\n",
 548                        jiffies_to_clock_t(br->multicast_membership_interval));
 549 }
 550
 551 static int set_membership_interval(struct net_bridge *br, unsigned long val)
 552 {
 553         br->multicast_membership_interval = clock_t_to_jiffies(val);
 554         return 0;
 555 }
 556
 557 static ssize_t multicast_membership_interval_store(
 558         struct device *d, struct device_attribute *attr, const char *buf,
 559         size_t len)
 560 {
 561         return store_bridge_parm(d, buf, len, set_membership_interval);
 562 }
 563 static DEVICE_ATTR_RW(multicast_membership_interval);
 564
 565 static ssize_t multicast_querier_interval_show(struct device *d,
 566                                                struct device_attribute *attr,
 567                                                char *buf)
 568 {
 569         struct net_bridge *br = to_bridge(d);
 570         return sprintf(buf, "%lu\n",
 571                        jiffies_to_clock_t(br->multicast_querier_interval));
 572 }
 573
 574 static int set_querier_interval(struct net_bridge *br, unsigned long val)
 575 {
 576         br->multicast_querier_interval = clock_t_to_jiffies(val);
 577         return 0;
 578 }
 579
 580 static ssize_t multicast_querier_interval_store(struct device *d,
 581                                                 struct device_attribute *attr,
 582                                                 const char *buf, size_t len)
 583 {
 584         return store_bridge_parm(d, buf, len, set_querier_interval);
 585 }
 586 static DEVICE_ATTR_RW(multicast_querier_interval);
 587
 588 static ssize_t multicast_query_interval_show(struct device *d,
 589                                              struct device_attribute *attr,
 590                                              char *buf)
 591 {
 592         struct net_bridge *br = to_bridge(d);
 593         return sprintf(buf, "%lu\n",
 594                        jiffies_to_clock_t(br->multicast_query_interval));
 595 }
 596
 597 static int set_query_interval(struct net_bridge *br, unsigned long val)
 598 {
 599         br->multicast_query_interval = clock_t_to_jiffies(val);
 600         return 0;
 601 }
 602
 603 static ssize_t multicast_query_interval_store(struct device *d,
 604                                               struct device_attribute *attr,
 605                                               const char *buf, size_t len)
 606 {
 607         return store_bridge_parm(d, buf, len, set_query_interval);
 608 }
 609 static DEVICE_ATTR_RW(multicast_query_interval);
 610
 611 static ssize_t multicast_query_response_interval_show(
 612         struct device *d, struct device_attribute *attr, char *buf)
 613 {
 614         struct net_bridge *br = to_bridge(d);
 615         return sprintf(
 616                 buf, "%lu\n",
 617                 jiffies_to_clock_t(br->multicast_query_response_interval));
 618 }
 619
 620 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
 621 {
 622         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 623         return 0;
 624 }
 625
 626 static ssize_t multicast_query_response_interval_store(
 627         struct device *d, struct device_attribute *attr, const char *buf,
 628         size_t len)
 629 {
 630         return store_bridge_parm(d, buf, len, set_query_response_interval);
 631 }
 632 static DEVICE_ATTR_RW(multicast_query_response_interval);
 633
 634 static ssize_t multicast_startup_query_interval_show(
 635         struct device *d, struct device_attribute *attr, char *buf)
 636 {
 637         struct net_bridge *br = to_bridge(d);
 638         return sprintf(
 639                 buf, "%lu\n",
 640                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 641 }
 642
 643 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
 644 {
 645         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 646         return 0;
 647 }
 648
 649 static ssize_t multicast_startup_query_interval_store(
 650         struct device *d, struct device_attribute *attr, const char *buf,
 651         size_t len)
 652 {
 653         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 654 }
 655 static DEVICE_ATTR_RW(multicast_startup_query_interval);
 656
 657 static ssize_t multicast_stats_enabled_show(struct device *d,
 658                                             struct device_attribute *attr,
 659                                             char *buf)
 660 {
 661         struct net_bridge *br = to_bridge(d);
 662
 663         return sprintf(buf, "%d\n",
 664                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
 665 }
 666
 667 static int set_stats_enabled(struct net_bridge *br, unsigned long val)
 668 {
 669         br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
 670         return 0;
 671 }
 672
 673 static ssize_t multicast_stats_enabled_store(struct device *d,
 674                                              struct device_attribute *attr,
 675                                              const char *buf,
 676                                              size_t len)
 677 {
 678         return store_bridge_parm(d, buf, len, set_stats_enabled);
 679 }
 680 static DEVICE_ATTR_RW(multicast_stats_enabled);
 681
 682 #if IS_ENABLED(CONFIG_IPV6)
 683 static ssize_t multicast_mld_version_show(struct device *d,
 684                                           struct device_attribute *attr,
 685                                           char *buf)
 686 {
 687         struct net_bridge *br = to_bridge(d);
 688
 689         return sprintf(buf, "%u\n", br->multicast_mld_version);
 690 }
 691
 692 static ssize_t multicast_mld_version_store(struct device *d,
 693                                            struct device_attribute *attr,
 694                                            const char *buf, size_t len)
 695 {
 696         return store_bridge_parm(d, buf, len, br_multicast_set_mld_version);
 697 }
 698 static DEVICE_ATTR_RW(multicast_mld_version);
 699 #endif
 700 #endif
 701 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 702 static ssize_t nf_call_iptables_show(
 703         struct device *d, struct device_attribute *attr, char *buf)
 704 {
 705         struct net_bridge *br = to_bridge(d);
 706         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES));
 707 }
 708
 709 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
 710 {
 711         br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
 712         return 0;
 713 }
 714
 715 static ssize_t nf_call_iptables_store(
 716         struct device *d, struct device_attribute *attr, const char *buf,
 717         size_t len)
 718 {
 719         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 720 }
 721 static DEVICE_ATTR_RW(nf_call_iptables);
 722
 723 static ssize_t nf_call_ip6tables_show(
 724         struct device *d, struct device_attribute *attr, char *buf)
 725 {
 726         struct net_bridge *br = to_bridge(d);
 727         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES));
 728 }
 729
 730 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
 731 {
 732         br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
 733         return 0;
 734 }
 735
 736 static ssize_t nf_call_ip6tables_store(
 737         struct device *d, struct device_attribute *attr, const char *buf,
 738         size_t len)
 739 {
 740         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 741 }
 742 static DEVICE_ATTR_RW(nf_call_ip6tables);
 743
 744 static ssize_t nf_call_arptables_show(
 745         struct device *d, struct device_attribute *attr, char *buf)
 746 {
 747         struct net_bridge *br = to_bridge(d);
 748         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
 749 }
 750
 751 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
 752 {
 753         br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
 754         return 0;
 755 }
 756
 757 static ssize_t nf_call_arptables_store(
 758         struct device *d, struct device_attribute *attr, const char *buf,
 759         size_t len)
 760 {
 761         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 762 }
 763 static DEVICE_ATTR_RW(nf_call_arptables);
 764 #endif
 765 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 766 static ssize_t vlan_filtering_show(struct device *d,
 767                                    struct device_attribute *attr,
 768                                    char *buf)
 769 {
 770         struct net_bridge *br = to_bridge(d);
 771         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
 772 }
 773
 774 static ssize_t vlan_filtering_store(struct device *d,
 775                                     struct device_attribute *attr,
 776                                     const char *buf, size_t len)
 777 {
 778         return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
 779 }
 780 static DEVICE_ATTR_RW(vlan_filtering);
 781
 782 static ssize_t vlan_protocol_show(struct device *d,
 783                                   struct device_attribute *attr,
 784                                   char *buf)
 785 {
 786         struct net_bridge *br = to_bridge(d);
 787         return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
 788 }
 789
 790 static ssize_t vlan_protocol_store(struct device *d,
 791                                    struct device_attribute *attr,
 792                                    const char *buf, size_t len)
 793 {
 794         return store_bridge_parm(d, buf, len, br_vlan_set_proto);
 795 }
 796 static DEVICE_ATTR_RW(vlan_protocol);
 797
 798 static ssize_t default_pvid_show(struct device *d,
 799                                  struct device_attribute *attr,
 800                                  char *buf)
 801 {
 802         struct net_bridge *br = to_bridge(d);
 803         return sprintf(buf, "%d\n", br->default_pvid);
 804 }
 805
 806 static ssize_t default_pvid_store(struct device *d,
 807                                   struct device_attribute *attr,
 808                                   const char *buf, size_t len)
 809 {
 810         return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
 811 }
 812 static DEVICE_ATTR_RW(default_pvid);
 813
 814 static ssize_t vlan_stats_enabled_show(struct device *d,
 815                                        struct device_attribute *attr,
 816                                        char *buf)
 817 {
 818         struct net_bridge *br = to_bridge(d);
 819         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
 820 }
 821
 822 static ssize_t vlan_stats_enabled_store(struct device *d,
 823                                         struct device_attribute *attr,
 824                                         const char *buf, size_t len)
 825 {
 826         return store_bridge_parm(d, buf, len, br_vlan_set_stats);
 827 }
 828 static DEVICE_ATTR_RW(vlan_stats_enabled);
 829
 830 static ssize_t vlan_stats_per_port_show(struct device *d,
 831                                         struct device_attribute *attr,
 832                                         char *buf)
 833 {
 834         struct net_bridge *br = to_bridge(d);
 835         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
 836 }
 837
 838 static ssize_t vlan_stats_per_port_store(struct device *d,
 839                                          struct device_attribute *attr,
 840                                          const char *buf, size_t len)
 841 {
 842         return store_bridge_parm(d, buf, len, br_vlan_set_stats_per_port);
 843 }
 844 static DEVICE_ATTR_RW(vlan_stats_per_port);
 845 #endif
 846
 847 static struct attribute *bridge_attrs[] = {
 848         &dev_attr_forward_delay.attr,
 849         &dev_attr_hello_time.attr,
 850         &dev_attr_max_age.attr,
 851         &dev_attr_ageing_time.attr,
 852         &dev_attr_stp_state.attr,
 853         &dev_attr_group_fwd_mask.attr,
 854         &dev_attr_priority.attr,
 855         &dev_attr_bridge_id.attr,
 856         &dev_attr_root_id.attr,
 857         &dev_attr_root_path_cost.attr,
 858         &dev_attr_root_port.attr,
 859         &dev_attr_topology_change.attr,
 860         &dev_attr_topology_change_detected.attr,
 861         &dev_attr_hello_timer.attr,
 862         &dev_attr_tcn_timer.attr,
 863         &dev_attr_topology_change_timer.attr,
 864         &dev_attr_gc_timer.attr,
 865         &dev_attr_group_addr.attr,
 866         &dev_attr_flush.attr,
 867         &dev_attr_no_linklocal_learn.attr,
 868 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 869         &dev_attr_multicast_router.attr,
 870         &dev_attr_multicast_snooping.attr,
 871         &dev_attr_multicast_querier.attr,
 872         &dev_attr_multicast_query_use_ifaddr.attr,
 873         &dev_attr_hash_elasticity.attr,
 874         &dev_attr_hash_max.attr,
 875         &dev_attr_multicast_last_member_count.attr,
 876         &dev_attr_multicast_startup_query_count.attr,
 877         &dev_attr_multicast_last_member_interval.attr,
 878         &dev_attr_multicast_membership_interval.attr,
 879         &dev_attr_multicast_querier_interval.attr,
 880         &dev_attr_multicast_query_interval.attr,
 881         &dev_attr_multicast_query_response_interval.attr,
 882         &dev_attr_multicast_startup_query_interval.attr,
 883         &dev_attr_multicast_stats_enabled.attr,
 884         &dev_attr_multicast_igmp_version.attr,
 885 #if IS_ENABLED(CONFIG_IPV6)
 886         &dev_attr_multicast_mld_version.attr,
 887 #endif
 888 #endif
 889 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 890         &dev_attr_nf_call_iptables.attr,
 891         &dev_attr_nf_call_ip6tables.attr,
 892         &dev_attr_nf_call_arptables.attr,
 893 #endif
 894 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 895         &dev_attr_vlan_filtering.attr,
 896         &dev_attr_vlan_protocol.attr,
 897         &dev_attr_default_pvid.attr,
 898         &dev_attr_vlan_stats_enabled.attr,
 899         &dev_attr_vlan_stats_per_port.attr,
 900 #endif
 901         NULL
 902 };
 903
 904 static const struct attribute_group bridge_group = {
 905         .name = SYSFS_BRIDGE_ATTR,
 906         .attrs = bridge_attrs,
 907 };
 908
 909 /*
 910  * Export the forwarding information table as a binary file
 911  * The records are struct __fdb_entry.
 912  *
 913  * Returns the number of bytes read.
 914  */
 915 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
 916                               struct bin_attribute *bin_attr,
 917                               char *buf, loff_t off, size_t count)
 918 {
 919         struct device *dev = kobj_to_dev(kobj);
 920         struct net_bridge *br = to_bridge(dev);
 921         int n;
 922
 923         /* must read whole records */
 924         if (off % sizeof(struct __fdb_entry) != 0)
 925                 return -EINVAL;
 926
 927         n =  br_fdb_fillbuf(br, buf,
 928                             count / sizeof(struct __fdb_entry),
 929                             off / sizeof(struct __fdb_entry));
 930
 931         if (n > 0)
 932                 n *= sizeof(struct __fdb_entry);
 933
 934         return n;
 935 }
 936
 937 static struct bin_attribute bridge_forward = {
 938         .attr = { .name = SYSFS_BRIDGE_FDB,
 939                   .mode = 0444, },
 940         .read = brforward_read,
 941 };
 942
 943 /*
 944  * Add entries in sysfs onto the existing network class device
 945  * for the bridge.
 946  *   Adds a attribute group "bridge" containing tuning parameters.
 947  *   Binary attribute containing the forward table
 948  *   Sub directory to hold links to interfaces.
 949  *
 950  * Note: the ifobj exists only to be a subdirectory
 951  *   to hold links.  The ifobj exists in same data structure
 952  *   as it's parent the bridge so reference counting works.
 953  */
 954 int br_sysfs_addbr(struct net_device *dev)
 955 {
 956         struct kobject *brobj = &dev->dev.kobj;
 957         struct net_bridge *br = netdev_priv(dev);
 958         int err;
 959
 960         err = sysfs_create_group(brobj, &bridge_group);
 961         if (err) {
 962                 pr_info("%s: can't create group %s/%s\n",
 963                         __func__, dev->name, bridge_group.name);
 964                 goto out1;
 965         }
 966
 967         err = sysfs_create_bin_file(brobj, &bridge_forward);
 968         if (err) {
 969                 pr_info("%s: can't create attribute file %s/%s\n",
 970                         __func__, dev->name, bridge_forward.attr.name);
 971                 goto out2;
 972         }
 973
 974         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
 975         if (!br->ifobj) {
 976                 pr_info("%s: can't add kobject (directory) %s/%s\n",
 977                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
 978                 err = -ENOMEM;
 979                 goto out3;
 980         }
 981         return 0;
 982  out3:
 983         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
 984  out2:
 985         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
 986  out1:
 987         return err;
 988
 989 }
 990
 991 void br_sysfs_delbr(struct net_device *dev)
 992 {
 993         struct kobject *kobj = &dev->dev.kobj;
 994         struct net_bridge *br = netdev_priv(dev);
 995
 996         kobject_put(br->ifobj);
 997         sysfs_remove_bin_file(kobj, &bridge_forward);
 998         sysfs_remove_group(kobj, &bridge_group);
 999 }