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 /* IMPORTANT: new bridge options must be added with netlink support only
  23  *            please do not add new sysfs entries
  24  */
  25
  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 *br, unsigned long val,
  34                                             struct netlink_ext_ack *extack))
  35 {
  36         struct net_bridge *br = to_bridge(d);
  37         struct netlink_ext_ack extack = {0};
  38         unsigned long val;
  39         int err;
  40
  41         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
  42                 return -EPERM;
  43
  44         err = kstrtoul(buf, 0, &val);
  45         if (err != 0)
  46                 return err;
  47
  48         if (!rtnl_trylock())
  49                 return restart_syscall();
  50
  51         err = (*set)(br, val, &extack);
  52         if (!err)
  53                 netdev_state_change(br->dev);
  54         if (extack._msg) {
  55                 if (err)
  56                         br_err(br, "%s\n", extack._msg);
  57                 else
  58                         br_warn(br, "%s\n", extack._msg);
  59         }
  60         rtnl_unlock();
  61
  62         return err ? err : len;
  63 }
  64
  65
  66 static ssize_t forward_delay_show(struct device *d,
  67                                   struct device_attribute *attr, char *buf)
  68 {
  69         struct net_bridge *br = to_bridge(d);
  70         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
  71 }
  72
  73 static int set_forward_delay(struct net_bridge *br, unsigned long val,
  74                              struct netlink_ext_ack *extack)
  75 {
  76         return br_set_forward_delay(br, val);
  77 }
  78
  79 static ssize_t forward_delay_store(struct device *d,
  80                                    struct device_attribute *attr,
  81                                    const char *buf, size_t len)
  82 {
  83         return store_bridge_parm(d, buf, len, set_forward_delay);
  84 }
  85 static DEVICE_ATTR_RW(forward_delay);
  86
  87 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
  88                                char *buf)
  89 {
  90         return sprintf(buf, "%lu\n",
  91                        jiffies_to_clock_t(to_bridge(d)->hello_time));
  92 }
  93
  94 static int set_hello_time(struct net_bridge *br, unsigned long val,
  95                           struct netlink_ext_ack *extack)
  96 {
  97         return br_set_hello_time(br, val);
  98 }
  99
 100 static ssize_t hello_time_store(struct device *d,
 101                                 struct device_attribute *attr, const char *buf,
 102                                 size_t len)
 103 {
 104         return store_bridge_parm(d, buf, len, set_hello_time);
 105 }
 106 static DEVICE_ATTR_RW(hello_time);
 107
 108 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
 109                             char *buf)
 110 {
 111         return sprintf(buf, "%lu\n",
 112                        jiffies_to_clock_t(to_bridge(d)->max_age));
 113 }
 114
 115 static int set_max_age(struct net_bridge *br, unsigned long val,
 116                        struct netlink_ext_ack *extack)
 117 {
 118         return br_set_max_age(br, val);
 119 }
 120
 121 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
 122                              const char *buf, size_t len)
 123 {
 124         return store_bridge_parm(d, buf, len, set_max_age);
 125 }
 126 static DEVICE_ATTR_RW(max_age);
 127
 128 static ssize_t ageing_time_show(struct device *d,
 129                                 struct device_attribute *attr, char *buf)
 130 {
 131         struct net_bridge *br = to_bridge(d);
 132         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 133 }
 134
 135 static int set_ageing_time(struct net_bridge *br, unsigned long val,
 136                            struct netlink_ext_ack *extack)
 137 {
 138         return br_set_ageing_time(br, val);
 139 }
 140
 141 static ssize_t ageing_time_store(struct device *d,
 142                                  struct device_attribute *attr,
 143                                  const char *buf, size_t len)
 144 {
 145         return store_bridge_parm(d, buf, len, set_ageing_time);
 146 }
 147 static DEVICE_ATTR_RW(ageing_time);
 148
 149 static ssize_t stp_state_show(struct device *d,
 150                               struct device_attribute *attr, char *buf)
 151 {
 152         struct net_bridge *br = to_bridge(d);
 153         return sprintf(buf, "%d\n", br->stp_enabled);
 154 }
 155
 156
 157 static int set_stp_state(struct net_bridge *br, unsigned long val,
 158                          struct netlink_ext_ack *extack)
 159 {
 160         return br_stp_set_enabled(br, val, extack);
 161 }
 162
 163 static ssize_t stp_state_store(struct device *d,
 164                                struct device_attribute *attr, const char *buf,
 165                                size_t len)
 166 {
 167         return store_bridge_parm(d, buf, len, set_stp_state);
 168 }
 169 static DEVICE_ATTR_RW(stp_state);
 170
 171 static ssize_t group_fwd_mask_show(struct device *d,
 172                                    struct device_attribute *attr,
 173                                    char *buf)
 174 {
 175         struct net_bridge *br = to_bridge(d);
 176         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 177 }
 178
 179 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val,
 180                               struct netlink_ext_ack *extack)
 181 {
 182         if (val & BR_GROUPFWD_RESTRICTED)
 183                 return -EINVAL;
 184
 185         br->group_fwd_mask = val;
 186
 187         return 0;
 188 }
 189
 190 static ssize_t group_fwd_mask_store(struct device *d,
 191                                     struct device_attribute *attr,
 192                                     const char *buf,
 193                                     size_t len)
 194 {
 195         return store_bridge_parm(d, buf, len, set_group_fwd_mask);
 196 }
 197 static DEVICE_ATTR_RW(group_fwd_mask);
 198
 199 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
 200                              char *buf)
 201 {
 202         struct net_bridge *br = to_bridge(d);
 203         return sprintf(buf, "%d\n",
 204                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 205 }
 206
 207 static int set_priority(struct net_bridge *br, unsigned long val,
 208                         struct netlink_ext_ack *extack)
 209 {
 210         br_stp_set_bridge_priority(br, (u16) val);
 211         return 0;
 212 }
 213
 214 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
 215                               const char *buf, size_t len)
 216 {
 217         return store_bridge_parm(d, buf, len, set_priority);
 218 }
 219 static DEVICE_ATTR_RW(priority);
 220
 221 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
 222                             char *buf)
 223 {
 224         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 225 }
 226 static DEVICE_ATTR_RO(root_id);
 227
 228 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
 229                               char *buf)
 230 {
 231         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 232 }
 233 static DEVICE_ATTR_RO(bridge_id);
 234
 235 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
 236                               char *buf)
 237 {
 238         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 239 }
 240 static DEVICE_ATTR_RO(root_port);
 241
 242 static ssize_t root_path_cost_show(struct device *d,
 243                                    struct device_attribute *attr, char *buf)
 244 {
 245         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 246 }
 247 static DEVICE_ATTR_RO(root_path_cost);
 248
 249 static ssize_t topology_change_show(struct device *d,
 250                                     struct device_attribute *attr, char *buf)
 251 {
 252         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 253 }
 254 static DEVICE_ATTR_RO(topology_change);
 255
 256 static ssize_t topology_change_detected_show(struct device *d,
 257                                              struct device_attribute *attr,
 258                                              char *buf)
 259 {
 260         struct net_bridge *br = to_bridge(d);
 261         return sprintf(buf, "%d\n", br->topology_change_detected);
 262 }
 263 static DEVICE_ATTR_RO(topology_change_detected);
 264
 265 static ssize_t hello_timer_show(struct device *d,
 266                                 struct device_attribute *attr, char *buf)
 267 {
 268         struct net_bridge *br = to_bridge(d);
 269         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 270 }
 271 static DEVICE_ATTR_RO(hello_timer);
 272
 273 static ssize_t tcn_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->tcn_timer));
 278 }
 279 static DEVICE_ATTR_RO(tcn_timer);
 280
 281 static ssize_t topology_change_timer_show(struct device *d,
 282                                           struct device_attribute *attr,
 283                                           char *buf)
 284 {
 285         struct net_bridge *br = to_bridge(d);
 286         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 287 }
 288 static DEVICE_ATTR_RO(topology_change_timer);
 289
 290 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
 291                              char *buf)
 292 {
 293         struct net_bridge *br = to_bridge(d);
 294         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer));
 295 }
 296 static DEVICE_ATTR_RO(gc_timer);
 297
 298 static ssize_t group_addr_show(struct device *d,
 299                                struct device_attribute *attr, char *buf)
 300 {
 301         struct net_bridge *br = to_bridge(d);
 302         return sprintf(buf, "%pM\n", br->group_addr);
 303 }
 304
 305 static ssize_t group_addr_store(struct device *d,
 306                                 struct device_attribute *attr,
 307                                 const char *buf, size_t len)
 308 {
 309         struct net_bridge *br = to_bridge(d);
 310         u8 new_addr[6];
 311
 312         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 313                 return -EPERM;
 314
 315         if (!mac_pton(buf, new_addr))
 316                 return -EINVAL;
 317
 318         if (!is_link_local_ether_addr(new_addr))
 319                 return -EINVAL;
 320
 321         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 322             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 323             new_addr[5] == 3)           /* 802.1X PAE address */
 324                 return -EINVAL;
 325
 326         if (!rtnl_trylock())
 327                 return restart_syscall();
 328
 329         spin_lock_bh(&br->lock);
 330         ether_addr_copy(br->group_addr, new_addr);
 331         spin_unlock_bh(&br->lock);
 332
 333         br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
 334         br_recalculate_fwd_mask(br);
 335         netdev_state_change(br->dev);
 336
 337         rtnl_unlock();
 338
 339         return len;
 340 }
 341
 342 static DEVICE_ATTR_RW(group_addr);
 343
 344 static int set_flush(struct net_bridge *br, unsigned long val,
 345                      struct netlink_ext_ack *extack)
 346 {
 347         struct net_bridge_fdb_flush_desc desc = {
 348                 .flags_mask = BIT(BR_FDB_STATIC)
 349         };
 350
 351         br_fdb_flush(br, &desc);
 352         return 0;
 353 }
 354
 355 static ssize_t flush_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, set_flush);
 360 }
 361 static DEVICE_ATTR_WO(flush);
 362
 363 static ssize_t no_linklocal_learn_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_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN));
 369 }
 370
 371 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val,
 372                                   struct netlink_ext_ack *extack)
 373 {
 374         return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, extack);
 375 }
 376
 377 static ssize_t no_linklocal_learn_store(struct device *d,
 378                                         struct device_attribute *attr,
 379                                         const char *buf, size_t len)
 380 {
 381         return store_bridge_parm(d, buf, len, set_no_linklocal_learn);
 382 }
 383 static DEVICE_ATTR_RW(no_linklocal_learn);
 384
 385 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 386 static ssize_t multicast_router_show(struct device *d,
 387                                      struct device_attribute *attr, char *buf)
 388 {
 389         struct net_bridge *br = to_bridge(d);
 390         return sprintf(buf, "%d\n", br->multicast_ctx.multicast_router);
 391 }
 392
 393 static int set_multicast_router(struct net_bridge *br, unsigned long val,
 394                                 struct netlink_ext_ack *extack)
 395 {
 396         return br_multicast_set_router(&br->multicast_ctx, val);
 397 }
 398
 399 static ssize_t multicast_router_store(struct device *d,
 400                                       struct device_attribute *attr,
 401                                       const char *buf, size_t len)
 402 {
 403         return store_bridge_parm(d, buf, len, set_multicast_router);
 404 }
 405 static DEVICE_ATTR_RW(multicast_router);
 406
 407 static ssize_t multicast_snooping_show(struct device *d,
 408                                        struct device_attribute *attr,
 409                                        char *buf)
 410 {
 411         struct net_bridge *br = to_bridge(d);
 412         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED));
 413 }
 414
 415 static ssize_t multicast_snooping_store(struct device *d,
 416                                         struct device_attribute *attr,
 417                                         const char *buf, size_t len)
 418 {
 419         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 420 }
 421 static DEVICE_ATTR_RW(multicast_snooping);
 422
 423 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
 424                                                struct device_attribute *attr,
 425                                                char *buf)
 426 {
 427         struct net_bridge *br = to_bridge(d);
 428         return sprintf(buf, "%d\n",
 429                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
 430 }
 431
 432 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val,
 433                                 struct netlink_ext_ack *extack)
 434 {
 435         br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
 436         return 0;
 437 }
 438
 439 static ssize_t
 440 multicast_query_use_ifaddr_store(struct device *d,
 441                                  struct device_attribute *attr,
 442                                  const char *buf, size_t len)
 443 {
 444         return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
 445 }
 446 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
 447
 448 static ssize_t multicast_querier_show(struct device *d,
 449                                       struct device_attribute *attr,
 450                                       char *buf)
 451 {
 452         struct net_bridge *br = to_bridge(d);
 453         return sprintf(buf, "%d\n", br->multicast_ctx.multicast_querier);
 454 }
 455
 456 static int set_multicast_querier(struct net_bridge *br, unsigned long val,
 457                                  struct netlink_ext_ack *extack)
 458 {
 459         return br_multicast_set_querier(&br->multicast_ctx, val);
 460 }
 461
 462 static ssize_t multicast_querier_store(struct device *d,
 463                                        struct device_attribute *attr,
 464                                        const char *buf, size_t len)
 465 {
 466         return store_bridge_parm(d, buf, len, set_multicast_querier);
 467 }
 468 static DEVICE_ATTR_RW(multicast_querier);
 469
 470 static ssize_t hash_elasticity_show(struct device *d,
 471                                     struct device_attribute *attr, char *buf)
 472 {
 473         return sprintf(buf, "%u\n", RHT_ELASTICITY);
 474 }
 475
 476 static int set_elasticity(struct net_bridge *br, unsigned long val,
 477                           struct netlink_ext_ack *extack)
 478 {
 479         /* 16 is RHT_ELASTICITY */
 480         NL_SET_ERR_MSG_MOD(extack,
 481                            "the hash_elasticity option has been deprecated and is always 16");
 482         return 0;
 483 }
 484
 485 static ssize_t hash_elasticity_store(struct device *d,
 486                                      struct device_attribute *attr,
 487                                      const char *buf, size_t len)
 488 {
 489         return store_bridge_parm(d, buf, len, set_elasticity);
 490 }
 491 static DEVICE_ATTR_RW(hash_elasticity);
 492
 493 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
 494                              char *buf)
 495 {
 496         struct net_bridge *br = to_bridge(d);
 497         return sprintf(buf, "%u\n", br->hash_max);
 498 }
 499
 500 static int set_hash_max(struct net_bridge *br, unsigned long val,
 501                         struct netlink_ext_ack *extack)
 502 {
 503         br->hash_max = val;
 504         return 0;
 505 }
 506
 507 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
 508                               const char *buf, size_t len)
 509 {
 510         return store_bridge_parm(d, buf, len, set_hash_max);
 511 }
 512 static DEVICE_ATTR_RW(hash_max);
 513
 514 static ssize_t multicast_igmp_version_show(struct device *d,
 515                                            struct device_attribute *attr,
 516                                            char *buf)
 517 {
 518         struct net_bridge *br = to_bridge(d);
 519
 520         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_igmp_version);
 521 }
 522
 523 static int set_multicast_igmp_version(struct net_bridge *br, unsigned long val,
 524                                       struct netlink_ext_ack *extack)
 525 {
 526         return br_multicast_set_igmp_version(&br->multicast_ctx, val);
 527 }
 528
 529 static ssize_t multicast_igmp_version_store(struct device *d,
 530                                             struct device_attribute *attr,
 531                                             const char *buf, size_t len)
 532 {
 533         return store_bridge_parm(d, buf, len, set_multicast_igmp_version);
 534 }
 535 static DEVICE_ATTR_RW(multicast_igmp_version);
 536
 537 static ssize_t multicast_last_member_count_show(struct device *d,
 538                                                 struct device_attribute *attr,
 539                                                 char *buf)
 540 {
 541         struct net_bridge *br = to_bridge(d);
 542         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_last_member_count);
 543 }
 544
 545 static int set_last_member_count(struct net_bridge *br, unsigned long val,
 546                                  struct netlink_ext_ack *extack)
 547 {
 548         br->multicast_ctx.multicast_last_member_count = val;
 549         return 0;
 550 }
 551
 552 static ssize_t multicast_last_member_count_store(struct device *d,
 553                                                  struct device_attribute *attr,
 554                                                  const char *buf, size_t len)
 555 {
 556         return store_bridge_parm(d, buf, len, set_last_member_count);
 557 }
 558 static DEVICE_ATTR_RW(multicast_last_member_count);
 559
 560 static ssize_t multicast_startup_query_count_show(
 561         struct device *d, struct device_attribute *attr, char *buf)
 562 {
 563         struct net_bridge *br = to_bridge(d);
 564         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_startup_query_count);
 565 }
 566
 567 static int set_startup_query_count(struct net_bridge *br, unsigned long val,
 568                                    struct netlink_ext_ack *extack)
 569 {
 570         br->multicast_ctx.multicast_startup_query_count = val;
 571         return 0;
 572 }
 573
 574 static ssize_t multicast_startup_query_count_store(
 575         struct device *d, struct device_attribute *attr, const char *buf,
 576         size_t len)
 577 {
 578         return store_bridge_parm(d, buf, len, set_startup_query_count);
 579 }
 580 static DEVICE_ATTR_RW(multicast_startup_query_count);
 581
 582 static ssize_t multicast_last_member_interval_show(
 583         struct device *d, struct device_attribute *attr, char *buf)
 584 {
 585         struct net_bridge *br = to_bridge(d);
 586         return sprintf(buf, "%lu\n",
 587                        jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval));
 588 }
 589
 590 static int set_last_member_interval(struct net_bridge *br, unsigned long val,
 591                                     struct netlink_ext_ack *extack)
 592 {
 593         br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
 594         return 0;
 595 }
 596
 597 static ssize_t multicast_last_member_interval_store(
 598         struct device *d, struct device_attribute *attr, const char *buf,
 599         size_t len)
 600 {
 601         return store_bridge_parm(d, buf, len, set_last_member_interval);
 602 }
 603 static DEVICE_ATTR_RW(multicast_last_member_interval);
 604
 605 static ssize_t multicast_membership_interval_show(
 606         struct device *d, struct device_attribute *attr, char *buf)
 607 {
 608         struct net_bridge *br = to_bridge(d);
 609         return sprintf(buf, "%lu\n",
 610                        jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval));
 611 }
 612
 613 static int set_membership_interval(struct net_bridge *br, unsigned long val,
 614                                    struct netlink_ext_ack *extack)
 615 {
 616         br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
 617         return 0;
 618 }
 619
 620 static ssize_t multicast_membership_interval_store(
 621         struct device *d, struct device_attribute *attr, const char *buf,
 622         size_t len)
 623 {
 624         return store_bridge_parm(d, buf, len, set_membership_interval);
 625 }
 626 static DEVICE_ATTR_RW(multicast_membership_interval);
 627
 628 static ssize_t multicast_querier_interval_show(struct device *d,
 629                                                struct device_attribute *attr,
 630                                                char *buf)
 631 {
 632         struct net_bridge *br = to_bridge(d);
 633         return sprintf(buf, "%lu\n",
 634                        jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval));
 635 }
 636
 637 static int set_querier_interval(struct net_bridge *br, unsigned long val,
 638                                 struct netlink_ext_ack *extack)
 639 {
 640         br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
 641         return 0;
 642 }
 643
 644 static ssize_t multicast_querier_interval_store(struct device *d,
 645                                                 struct device_attribute *attr,
 646                                                 const char *buf, size_t len)
 647 {
 648         return store_bridge_parm(d, buf, len, set_querier_interval);
 649 }
 650 static DEVICE_ATTR_RW(multicast_querier_interval);
 651
 652 static ssize_t multicast_query_interval_show(struct device *d,
 653                                              struct device_attribute *attr,
 654                                              char *buf)
 655 {
 656         struct net_bridge *br = to_bridge(d);
 657         return sprintf(buf, "%lu\n",
 658                        jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval));
 659 }
 660
 661 static int set_query_interval(struct net_bridge *br, unsigned long val,
 662                               struct netlink_ext_ack *extack)
 663 {
 664         br_multicast_set_query_intvl(&br->multicast_ctx, val);
 665         return 0;
 666 }
 667
 668 static ssize_t multicast_query_interval_store(struct device *d,
 669                                               struct device_attribute *attr,
 670                                               const char *buf, size_t len)
 671 {
 672         return store_bridge_parm(d, buf, len, set_query_interval);
 673 }
 674 static DEVICE_ATTR_RW(multicast_query_interval);
 675
 676 static ssize_t multicast_query_response_interval_show(
 677         struct device *d, struct device_attribute *attr, char *buf)
 678 {
 679         struct net_bridge *br = to_bridge(d);
 680         return sprintf(
 681                 buf, "%lu\n",
 682                 jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval));
 683 }
 684
 685 static int set_query_response_interval(struct net_bridge *br, unsigned long val,
 686                                        struct netlink_ext_ack *extack)
 687 {
 688         br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
 689         return 0;
 690 }
 691
 692 static ssize_t multicast_query_response_interval_store(
 693         struct device *d, struct device_attribute *attr, const char *buf,
 694         size_t len)
 695 {
 696         return store_bridge_parm(d, buf, len, set_query_response_interval);
 697 }
 698 static DEVICE_ATTR_RW(multicast_query_response_interval);
 699
 700 static ssize_t multicast_startup_query_interval_show(
 701         struct device *d, struct device_attribute *attr, char *buf)
 702 {
 703         struct net_bridge *br = to_bridge(d);
 704         return sprintf(
 705                 buf, "%lu\n",
 706                 jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval));
 707 }
 708
 709 static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
 710                                       struct netlink_ext_ack *extack)
 711 {
 712         br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
 713         return 0;
 714 }
 715
 716 static ssize_t multicast_startup_query_interval_store(
 717         struct device *d, struct device_attribute *attr, const char *buf,
 718         size_t len)
 719 {
 720         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 721 }
 722 static DEVICE_ATTR_RW(multicast_startup_query_interval);
 723
 724 static ssize_t multicast_stats_enabled_show(struct device *d,
 725                                             struct device_attribute *attr,
 726                                             char *buf)
 727 {
 728         struct net_bridge *br = to_bridge(d);
 729
 730         return sprintf(buf, "%d\n",
 731                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
 732 }
 733
 734 static int set_stats_enabled(struct net_bridge *br, unsigned long val,
 735                              struct netlink_ext_ack *extack)
 736 {
 737         br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
 738         return 0;
 739 }
 740
 741 static ssize_t multicast_stats_enabled_store(struct device *d,
 742                                              struct device_attribute *attr,
 743                                              const char *buf,
 744                                              size_t len)
 745 {
 746         return store_bridge_parm(d, buf, len, set_stats_enabled);
 747 }
 748 static DEVICE_ATTR_RW(multicast_stats_enabled);
 749
 750 #if IS_ENABLED(CONFIG_IPV6)
 751 static ssize_t multicast_mld_version_show(struct device *d,
 752                                           struct device_attribute *attr,
 753                                           char *buf)
 754 {
 755         struct net_bridge *br = to_bridge(d);
 756
 757         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_mld_version);
 758 }
 759
 760 static int set_multicast_mld_version(struct net_bridge *br, unsigned long val,
 761                                      struct netlink_ext_ack *extack)
 762 {
 763         return br_multicast_set_mld_version(&br->multicast_ctx, val);
 764 }
 765
 766 static ssize_t multicast_mld_version_store(struct device *d,
 767                                            struct device_attribute *attr,
 768                                            const char *buf, size_t len)
 769 {
 770         return store_bridge_parm(d, buf, len, set_multicast_mld_version);
 771 }
 772 static DEVICE_ATTR_RW(multicast_mld_version);
 773 #endif
 774 #endif
 775 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 776 static ssize_t nf_call_iptables_show(
 777         struct device *d, struct device_attribute *attr, char *buf)
 778 {
 779         struct net_bridge *br = to_bridge(d);
 780         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES));
 781 }
 782
 783 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val,
 784                                 struct netlink_ext_ack *extack)
 785 {
 786         br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
 787         return 0;
 788 }
 789
 790 static ssize_t nf_call_iptables_store(
 791         struct device *d, struct device_attribute *attr, const char *buf,
 792         size_t len)
 793 {
 794         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 795 }
 796 static DEVICE_ATTR_RW(nf_call_iptables);
 797
 798 static ssize_t nf_call_ip6tables_show(
 799         struct device *d, struct device_attribute *attr, char *buf)
 800 {
 801         struct net_bridge *br = to_bridge(d);
 802         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES));
 803 }
 804
 805 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val,
 806                                  struct netlink_ext_ack *extack)
 807 {
 808         br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
 809         return 0;
 810 }
 811
 812 static ssize_t nf_call_ip6tables_store(
 813         struct device *d, struct device_attribute *attr, const char *buf,
 814         size_t len)
 815 {
 816         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 817 }
 818 static DEVICE_ATTR_RW(nf_call_ip6tables);
 819
 820 static ssize_t nf_call_arptables_show(
 821         struct device *d, struct device_attribute *attr, char *buf)
 822 {
 823         struct net_bridge *br = to_bridge(d);
 824         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
 825 }
 826
 827 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val,
 828                                  struct netlink_ext_ack *extack)
 829 {
 830         br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
 831         return 0;
 832 }
 833
 834 static ssize_t nf_call_arptables_store(
 835         struct device *d, struct device_attribute *attr, const char *buf,
 836         size_t len)
 837 {
 838         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 839 }
 840 static DEVICE_ATTR_RW(nf_call_arptables);
 841 #endif
 842 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 843 static ssize_t vlan_filtering_show(struct device *d,
 844                                    struct device_attribute *attr,
 845                                    char *buf)
 846 {
 847         struct net_bridge *br = to_bridge(d);
 848         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
 849 }
 850
 851 static ssize_t vlan_filtering_store(struct device *d,
 852                                     struct device_attribute *attr,
 853                                     const char *buf, size_t len)
 854 {
 855         return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
 856 }
 857 static DEVICE_ATTR_RW(vlan_filtering);
 858
 859 static ssize_t vlan_protocol_show(struct device *d,
 860                                   struct device_attribute *attr,
 861                                   char *buf)
 862 {
 863         struct net_bridge *br = to_bridge(d);
 864         return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
 865 }
 866
 867 static ssize_t vlan_protocol_store(struct device *d,
 868                                    struct device_attribute *attr,
 869                                    const char *buf, size_t len)
 870 {
 871         return store_bridge_parm(d, buf, len, br_vlan_set_proto);
 872 }
 873 static DEVICE_ATTR_RW(vlan_protocol);
 874
 875 static ssize_t default_pvid_show(struct device *d,
 876                                  struct device_attribute *attr,
 877                                  char *buf)
 878 {
 879         struct net_bridge *br = to_bridge(d);
 880         return sprintf(buf, "%d\n", br->default_pvid);
 881 }
 882
 883 static ssize_t default_pvid_store(struct device *d,
 884                                   struct device_attribute *attr,
 885                                   const char *buf, size_t len)
 886 {
 887         return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
 888 }
 889 static DEVICE_ATTR_RW(default_pvid);
 890
 891 static ssize_t vlan_stats_enabled_show(struct device *d,
 892                                        struct device_attribute *attr,
 893                                        char *buf)
 894 {
 895         struct net_bridge *br = to_bridge(d);
 896         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
 897 }
 898
 899 static int set_vlan_stats_enabled(struct net_bridge *br, unsigned long val,
 900                                   struct netlink_ext_ack *extack)
 901 {
 902         return br_vlan_set_stats(br, val);
 903 }
 904
 905 static ssize_t vlan_stats_enabled_store(struct device *d,
 906                                         struct device_attribute *attr,
 907                                         const char *buf, size_t len)
 908 {
 909         return store_bridge_parm(d, buf, len, set_vlan_stats_enabled);
 910 }
 911 static DEVICE_ATTR_RW(vlan_stats_enabled);
 912
 913 static ssize_t vlan_stats_per_port_show(struct device *d,
 914                                         struct device_attribute *attr,
 915                                         char *buf)
 916 {
 917         struct net_bridge *br = to_bridge(d);
 918         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
 919 }
 920
 921 static int set_vlan_stats_per_port(struct net_bridge *br, unsigned long val,
 922                                    struct netlink_ext_ack *extack)
 923 {
 924         return br_vlan_set_stats_per_port(br, val);
 925 }
 926
 927 static ssize_t vlan_stats_per_port_store(struct device *d,
 928                                          struct device_attribute *attr,
 929                                          const char *buf, size_t len)
 930 {
 931         return store_bridge_parm(d, buf, len, set_vlan_stats_per_port);
 932 }
 933 static DEVICE_ATTR_RW(vlan_stats_per_port);
 934 #endif
 935
 936 static struct attribute *bridge_attrs[] = {
 937         &dev_attr_forward_delay.attr,
 938         &dev_attr_hello_time.attr,
 939         &dev_attr_max_age.attr,
 940         &dev_attr_ageing_time.attr,
 941         &dev_attr_stp_state.attr,
 942         &dev_attr_group_fwd_mask.attr,
 943         &dev_attr_priority.attr,
 944         &dev_attr_bridge_id.attr,
 945         &dev_attr_root_id.attr,
 946         &dev_attr_root_path_cost.attr,
 947         &dev_attr_root_port.attr,
 948         &dev_attr_topology_change.attr,
 949         &dev_attr_topology_change_detected.attr,
 950         &dev_attr_hello_timer.attr,
 951         &dev_attr_tcn_timer.attr,
 952         &dev_attr_topology_change_timer.attr,
 953         &dev_attr_gc_timer.attr,
 954         &dev_attr_group_addr.attr,
 955         &dev_attr_flush.attr,
 956         &dev_attr_no_linklocal_learn.attr,
 957 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 958         &dev_attr_multicast_router.attr,
 959         &dev_attr_multicast_snooping.attr,
 960         &dev_attr_multicast_querier.attr,
 961         &dev_attr_multicast_query_use_ifaddr.attr,
 962         &dev_attr_hash_elasticity.attr,
 963         &dev_attr_hash_max.attr,
 964         &dev_attr_multicast_last_member_count.attr,
 965         &dev_attr_multicast_startup_query_count.attr,
 966         &dev_attr_multicast_last_member_interval.attr,
 967         &dev_attr_multicast_membership_interval.attr,
 968         &dev_attr_multicast_querier_interval.attr,
 969         &dev_attr_multicast_query_interval.attr,
 970         &dev_attr_multicast_query_response_interval.attr,
 971         &dev_attr_multicast_startup_query_interval.attr,
 972         &dev_attr_multicast_stats_enabled.attr,
 973         &dev_attr_multicast_igmp_version.attr,
 974 #if IS_ENABLED(CONFIG_IPV6)
 975         &dev_attr_multicast_mld_version.attr,
 976 #endif
 977 #endif
 978 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 979         &dev_attr_nf_call_iptables.attr,
 980         &dev_attr_nf_call_ip6tables.attr,
 981         &dev_attr_nf_call_arptables.attr,
 982 #endif
 983 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 984         &dev_attr_vlan_filtering.attr,
 985         &dev_attr_vlan_protocol.attr,
 986         &dev_attr_default_pvid.attr,
 987         &dev_attr_vlan_stats_enabled.attr,
 988         &dev_attr_vlan_stats_per_port.attr,
 989 #endif
 990         NULL
 991 };
 992
 993 static const struct attribute_group bridge_group = {
 994         .name = SYSFS_BRIDGE_ATTR,
 995         .attrs = bridge_attrs,
 996 };
 997
 998 /*
 999  * Export the forwarding information table as a binary file
1000  * The records are struct __fdb_entry.
1001  *
1002  * Returns the number of bytes read.
1003  */
1004 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
1005                               struct bin_attribute *bin_attr,
1006                               char *buf, loff_t off, size_t count)
1007 {
1008         struct device *dev = kobj_to_dev(kobj);
1009         struct net_bridge *br = to_bridge(dev);
1010         int n;
1011
1012         /* must read whole records */
1013         if (off % sizeof(struct __fdb_entry) != 0)
1014                 return -EINVAL;
1015
1016         n =  br_fdb_fillbuf(br, buf,
1017                             count / sizeof(struct __fdb_entry),
1018                             off / sizeof(struct __fdb_entry));
1019
1020         if (n > 0)
1021                 n *= sizeof(struct __fdb_entry);
1022
1023         return n;
1024 }
1025
1026 static struct bin_attribute bridge_forward = {
1027         .attr = { .name = SYSFS_BRIDGE_FDB,
1028                   .mode = 0444, },
1029         .read = brforward_read,
1030 };
1031
1032 /*
1033  * Add entries in sysfs onto the existing network class device
1034  * for the bridge.
1035  *   Adds a attribute group "bridge" containing tuning parameters.
1036  *   Binary attribute containing the forward table
1037  *   Sub directory to hold links to interfaces.
1038  *
1039  * Note: the ifobj exists only to be a subdirectory
1040  *   to hold links.  The ifobj exists in same data structure
1041  *   as it's parent the bridge so reference counting works.
1042  */
1043 int br_sysfs_addbr(struct net_device *dev)
1044 {
1045         struct kobject *brobj = &dev->dev.kobj;
1046         struct net_bridge *br = netdev_priv(dev);
1047         int err;
1048
1049         err = sysfs_create_group(brobj, &bridge_group);
1050         if (err) {
1051                 pr_info("%s: can't create group %s/%s\n",
1052                         __func__, dev->name, bridge_group.name);
1053                 goto out1;
1054         }
1055
1056         err = sysfs_create_bin_file(brobj, &bridge_forward);
1057         if (err) {
1058                 pr_info("%s: can't create attribute file %s/%s\n",
1059                         __func__, dev->name, bridge_forward.attr.name);
1060                 goto out2;
1061         }
1062
1063         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
1064         if (!br->ifobj) {
1065                 pr_info("%s: can't add kobject (directory) %s/%s\n",
1066                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
1067                 err = -ENOMEM;
1068                 goto out3;
1069         }
1070         return 0;
1071  out3:
1072         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
1073  out2:
1074         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
1075  out1:
1076         return err;
1077
1078 }
1079
1080 void br_sysfs_delbr(struct net_device *dev)
1081 {
1082         struct kobject *kobj = &dev->dev.kobj;
1083         struct net_bridge *br = netdev_priv(dev);
1084
1085         kobject_put(br->ifobj);
1086         sysfs_remove_bin_file(kobj, &bridge_forward);
1087         sysfs_remove_group(kobj, &bridge_group);
1088 }