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         char *endp;
  40         int err;
  41
  42         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
  43                 return -EPERM;
  44
  45         val = simple_strtoul(buf, &endp, 0);
  46         if (endp == buf)
  47                 return -EINVAL;
  48
  49         if (!rtnl_trylock())
  50                 return restart_syscall();
  51
  52         err = (*set)(br, val, &extack);
  53         if (!err)
  54                 netdev_state_change(br->dev);
  55         if (extack._msg) {
  56                 if (err)
  57                         br_err(br, "%s\n", extack._msg);
  58                 else
  59                         br_warn(br, "%s\n", extack._msg);
  60         }
  61         rtnl_unlock();
  62
  63         return err ? err : len;
  64 }
  65
  66
  67 static ssize_t forward_delay_show(struct device *d,
  68                                   struct device_attribute *attr, char *buf)
  69 {
  70         struct net_bridge *br = to_bridge(d);
  71         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
  72 }
  73
  74 static int set_forward_delay(struct net_bridge *br, unsigned long val,
  75                              struct netlink_ext_ack *extack)
  76 {
  77         return br_set_forward_delay(br, val);
  78 }
  79
  80 static ssize_t forward_delay_store(struct device *d,
  81                                    struct device_attribute *attr,
  82                                    const char *buf, size_t len)
  83 {
  84         return store_bridge_parm(d, buf, len, set_forward_delay);
  85 }
  86 static DEVICE_ATTR_RW(forward_delay);
  87
  88 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
  89                                char *buf)
  90 {
  91         return sprintf(buf, "%lu\n",
  92                        jiffies_to_clock_t(to_bridge(d)->hello_time));
  93 }
  94
  95 static int set_hello_time(struct net_bridge *br, unsigned long val,
  96                           struct netlink_ext_ack *extack)
  97 {
  98         return br_set_hello_time(br, val);
  99 }
 100
 101 static ssize_t hello_time_store(struct device *d,
 102                                 struct device_attribute *attr, const char *buf,
 103                                 size_t len)
 104 {
 105         return store_bridge_parm(d, buf, len, set_hello_time);
 106 }
 107 static DEVICE_ATTR_RW(hello_time);
 108
 109 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
 110                             char *buf)
 111 {
 112         return sprintf(buf, "%lu\n",
 113                        jiffies_to_clock_t(to_bridge(d)->max_age));
 114 }
 115
 116 static int set_max_age(struct net_bridge *br, unsigned long val,
 117                        struct netlink_ext_ack *extack)
 118 {
 119         return br_set_max_age(br, val);
 120 }
 121
 122 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
 123                              const char *buf, size_t len)
 124 {
 125         return store_bridge_parm(d, buf, len, set_max_age);
 126 }
 127 static DEVICE_ATTR_RW(max_age);
 128
 129 static ssize_t ageing_time_show(struct device *d,
 130                                 struct device_attribute *attr, char *buf)
 131 {
 132         struct net_bridge *br = to_bridge(d);
 133         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 134 }
 135
 136 static int set_ageing_time(struct net_bridge *br, unsigned long val,
 137                            struct netlink_ext_ack *extack)
 138 {
 139         return br_set_ageing_time(br, val);
 140 }
 141
 142 static ssize_t ageing_time_store(struct device *d,
 143                                  struct device_attribute *attr,
 144                                  const char *buf, size_t len)
 145 {
 146         return store_bridge_parm(d, buf, len, set_ageing_time);
 147 }
 148 static DEVICE_ATTR_RW(ageing_time);
 149
 150 static ssize_t stp_state_show(struct device *d,
 151                               struct device_attribute *attr, char *buf)
 152 {
 153         struct net_bridge *br = to_bridge(d);
 154         return sprintf(buf, "%d\n", br->stp_enabled);
 155 }
 156
 157
 158 static int set_stp_state(struct net_bridge *br, unsigned long val,
 159                          struct netlink_ext_ack *extack)
 160 {
 161         return br_stp_set_enabled(br, val, extack);
 162 }
 163
 164 static ssize_t stp_state_store(struct device *d,
 165                                struct device_attribute *attr, const char *buf,
 166                                size_t len)
 167 {
 168         return store_bridge_parm(d, buf, len, set_stp_state);
 169 }
 170 static DEVICE_ATTR_RW(stp_state);
 171
 172 static ssize_t group_fwd_mask_show(struct device *d,
 173                                    struct device_attribute *attr,
 174                                    char *buf)
 175 {
 176         struct net_bridge *br = to_bridge(d);
 177         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 178 }
 179
 180 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val,
 181                               struct netlink_ext_ack *extack)
 182 {
 183         if (val & BR_GROUPFWD_RESTRICTED)
 184                 return -EINVAL;
 185
 186         br->group_fwd_mask = val;
 187
 188         return 0;
 189 }
 190
 191 static ssize_t group_fwd_mask_store(struct device *d,
 192                                     struct device_attribute *attr,
 193                                     const char *buf,
 194                                     size_t len)
 195 {
 196         return store_bridge_parm(d, buf, len, set_group_fwd_mask);
 197 }
 198 static DEVICE_ATTR_RW(group_fwd_mask);
 199
 200 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
 201                              char *buf)
 202 {
 203         struct net_bridge *br = to_bridge(d);
 204         return sprintf(buf, "%d\n",
 205                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 206 }
 207
 208 static int set_priority(struct net_bridge *br, unsigned long val,
 209                         struct netlink_ext_ack *extack)
 210 {
 211         br_stp_set_bridge_priority(br, (u16) val);
 212         return 0;
 213 }
 214
 215 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
 216                               const char *buf, size_t len)
 217 {
 218         return store_bridge_parm(d, buf, len, set_priority);
 219 }
 220 static DEVICE_ATTR_RW(priority);
 221
 222 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
 223                             char *buf)
 224 {
 225         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 226 }
 227 static DEVICE_ATTR_RO(root_id);
 228
 229 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
 230                               char *buf)
 231 {
 232         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 233 }
 234 static DEVICE_ATTR_RO(bridge_id);
 235
 236 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
 237                               char *buf)
 238 {
 239         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 240 }
 241 static DEVICE_ATTR_RO(root_port);
 242
 243 static ssize_t root_path_cost_show(struct device *d,
 244                                    struct device_attribute *attr, char *buf)
 245 {
 246         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 247 }
 248 static DEVICE_ATTR_RO(root_path_cost);
 249
 250 static ssize_t topology_change_show(struct device *d,
 251                                     struct device_attribute *attr, char *buf)
 252 {
 253         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 254 }
 255 static DEVICE_ATTR_RO(topology_change);
 256
 257 static ssize_t topology_change_detected_show(struct device *d,
 258                                              struct device_attribute *attr,
 259                                              char *buf)
 260 {
 261         struct net_bridge *br = to_bridge(d);
 262         return sprintf(buf, "%d\n", br->topology_change_detected);
 263 }
 264 static DEVICE_ATTR_RO(topology_change_detected);
 265
 266 static ssize_t hello_timer_show(struct device *d,
 267                                 struct device_attribute *attr, char *buf)
 268 {
 269         struct net_bridge *br = to_bridge(d);
 270         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 271 }
 272 static DEVICE_ATTR_RO(hello_timer);
 273
 274 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
 275                               char *buf)
 276 {
 277         struct net_bridge *br = to_bridge(d);
 278         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 279 }
 280 static DEVICE_ATTR_RO(tcn_timer);
 281
 282 static ssize_t topology_change_timer_show(struct device *d,
 283                                           struct device_attribute *attr,
 284                                           char *buf)
 285 {
 286         struct net_bridge *br = to_bridge(d);
 287         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 288 }
 289 static DEVICE_ATTR_RO(topology_change_timer);
 290
 291 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
 292                              char *buf)
 293 {
 294         struct net_bridge *br = to_bridge(d);
 295         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer));
 296 }
 297 static DEVICE_ATTR_RO(gc_timer);
 298
 299 static ssize_t group_addr_show(struct device *d,
 300                                struct device_attribute *attr, char *buf)
 301 {
 302         struct net_bridge *br = to_bridge(d);
 303         return sprintf(buf, "%pM\n", br->group_addr);
 304 }
 305
 306 static ssize_t group_addr_store(struct device *d,
 307                                 struct device_attribute *attr,
 308                                 const char *buf, size_t len)
 309 {
 310         struct net_bridge *br = to_bridge(d);
 311         u8 new_addr[6];
 312
 313         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 314                 return -EPERM;
 315
 316         if (!mac_pton(buf, new_addr))
 317                 return -EINVAL;
 318
 319         if (!is_link_local_ether_addr(new_addr))
 320                 return -EINVAL;
 321
 322         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 323             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 324             new_addr[5] == 3)           /* 802.1X PAE address */
 325                 return -EINVAL;
 326
 327         if (!rtnl_trylock())
 328                 return restart_syscall();
 329
 330         spin_lock_bh(&br->lock);
 331         ether_addr_copy(br->group_addr, new_addr);
 332         spin_unlock_bh(&br->lock);
 333
 334         br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
 335         br_recalculate_fwd_mask(br);
 336         netdev_state_change(br->dev);
 337
 338         rtnl_unlock();
 339
 340         return len;
 341 }
 342
 343 static DEVICE_ATTR_RW(group_addr);
 344
 345 static int set_flush(struct net_bridge *br, unsigned long val,
 346                      struct netlink_ext_ack *extack)
 347 {
 348         br_fdb_flush(br);
 349         return 0;
 350 }
 351
 352 static ssize_t flush_store(struct device *d,
 353                            struct device_attribute *attr,
 354                            const char *buf, size_t len)
 355 {
 356         return store_bridge_parm(d, buf, len, set_flush);
 357 }
 358 static DEVICE_ATTR_WO(flush);
 359
 360 static ssize_t no_linklocal_learn_show(struct device *d,
 361                                        struct device_attribute *attr,
 362                                        char *buf)
 363 {
 364         struct net_bridge *br = to_bridge(d);
 365         return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN));
 366 }
 367
 368 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val,
 369                                   struct netlink_ext_ack *extack)
 370 {
 371         return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, extack);
 372 }
 373
 374 static ssize_t no_linklocal_learn_store(struct device *d,
 375                                         struct device_attribute *attr,
 376                                         const char *buf, size_t len)
 377 {
 378         return store_bridge_parm(d, buf, len, set_no_linklocal_learn);
 379 }
 380 static DEVICE_ATTR_RW(no_linklocal_learn);
 381
 382 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 383 static ssize_t multicast_router_show(struct device *d,
 384                                      struct device_attribute *attr, char *buf)
 385 {
 386         struct net_bridge *br = to_bridge(d);
 387         return sprintf(buf, "%d\n", br->multicast_router);
 388 }
 389
 390 static int set_multicast_router(struct net_bridge *br, unsigned long val,
 391                                 struct netlink_ext_ack *extack)
 392 {
 393         return br_multicast_set_router(br, val);
 394 }
 395
 396 static ssize_t multicast_router_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_multicast_router);
 401 }
 402 static DEVICE_ATTR_RW(multicast_router);
 403
 404 static ssize_t multicast_snooping_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_ENABLED));
 410 }
 411
 412 static ssize_t multicast_snooping_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_toggle);
 417 }
 418 static DEVICE_ATTR_RW(multicast_snooping);
 419
 420 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
 421                                                struct device_attribute *attr,
 422                                                char *buf)
 423 {
 424         struct net_bridge *br = to_bridge(d);
 425         return sprintf(buf, "%d\n",
 426                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
 427 }
 428
 429 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val,
 430                                 struct netlink_ext_ack *extack)
 431 {
 432         br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
 433         return 0;
 434 }
 435
 436 static ssize_t
 437 multicast_query_use_ifaddr_store(struct device *d,
 438                                  struct device_attribute *attr,
 439                                  const char *buf, size_t len)
 440 {
 441         return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
 442 }
 443 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
 444
 445 static ssize_t multicast_querier_show(struct device *d,
 446                                       struct device_attribute *attr,
 447                                       char *buf)
 448 {
 449         struct net_bridge *br = to_bridge(d);
 450         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_QUERIER));
 451 }
 452
 453 static int set_multicast_querier(struct net_bridge *br, unsigned long val,
 454                                  struct netlink_ext_ack *extack)
 455 {
 456         return br_multicast_set_querier(br, val);
 457 }
 458
 459 static ssize_t multicast_querier_store(struct device *d,
 460                                        struct device_attribute *attr,
 461                                        const char *buf, size_t len)
 462 {
 463         return store_bridge_parm(d, buf, len, set_multicast_querier);
 464 }
 465 static DEVICE_ATTR_RW(multicast_querier);
 466
 467 static ssize_t hash_elasticity_show(struct device *d,
 468                                     struct device_attribute *attr, char *buf)
 469 {
 470         return sprintf(buf, "%u\n", RHT_ELASTICITY);
 471 }
 472
 473 static int set_elasticity(struct net_bridge *br, unsigned long val,
 474                           struct netlink_ext_ack *extack)
 475 {
 476         /* 16 is RHT_ELASTICITY */
 477         NL_SET_ERR_MSG_MOD(extack,
 478                            "the hash_elasticity option has been deprecated and is always 16");
 479         return 0;
 480 }
 481
 482 static ssize_t hash_elasticity_store(struct device *d,
 483                                      struct device_attribute *attr,
 484                                      const char *buf, size_t len)
 485 {
 486         return store_bridge_parm(d, buf, len, set_elasticity);
 487 }
 488 static DEVICE_ATTR_RW(hash_elasticity);
 489
 490 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
 491                              char *buf)
 492 {
 493         struct net_bridge *br = to_bridge(d);
 494         return sprintf(buf, "%u\n", br->hash_max);
 495 }
 496
 497 static int set_hash_max(struct net_bridge *br, unsigned long val,
 498                         struct netlink_ext_ack *extack)
 499 {
 500         br->hash_max = val;
 501         return 0;
 502 }
 503
 504 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
 505                               const char *buf, size_t len)
 506 {
 507         return store_bridge_parm(d, buf, len, set_hash_max);
 508 }
 509 static DEVICE_ATTR_RW(hash_max);
 510
 511 static ssize_t multicast_igmp_version_show(struct device *d,
 512                                            struct device_attribute *attr,
 513                                            char *buf)
 514 {
 515         struct net_bridge *br = to_bridge(d);
 516
 517         return sprintf(buf, "%u\n", br->multicast_igmp_version);
 518 }
 519
 520 static int set_multicast_igmp_version(struct net_bridge *br, unsigned long val,
 521                                       struct netlink_ext_ack *extack)
 522 {
 523         return br_multicast_set_igmp_version(br, val);
 524 }
 525
 526 static ssize_t multicast_igmp_version_store(struct device *d,
 527                                             struct device_attribute *attr,
 528                                             const char *buf, size_t len)
 529 {
 530         return store_bridge_parm(d, buf, len, set_multicast_igmp_version);
 531 }
 532 static DEVICE_ATTR_RW(multicast_igmp_version);
 533
 534 static ssize_t multicast_last_member_count_show(struct device *d,
 535                                                 struct device_attribute *attr,
 536                                                 char *buf)
 537 {
 538         struct net_bridge *br = to_bridge(d);
 539         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 540 }
 541
 542 static int set_last_member_count(struct net_bridge *br, unsigned long val,
 543                                  struct netlink_ext_ack *extack)
 544 {
 545         br->multicast_last_member_count = val;
 546         return 0;
 547 }
 548
 549 static ssize_t multicast_last_member_count_store(struct device *d,
 550                                                  struct device_attribute *attr,
 551                                                  const char *buf, size_t len)
 552 {
 553         return store_bridge_parm(d, buf, len, set_last_member_count);
 554 }
 555 static DEVICE_ATTR_RW(multicast_last_member_count);
 556
 557 static ssize_t multicast_startup_query_count_show(
 558         struct device *d, struct device_attribute *attr, char *buf)
 559 {
 560         struct net_bridge *br = to_bridge(d);
 561         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 562 }
 563
 564 static int set_startup_query_count(struct net_bridge *br, unsigned long val,
 565                                    struct netlink_ext_ack *extack)
 566 {
 567         br->multicast_startup_query_count = val;
 568         return 0;
 569 }
 570
 571 static ssize_t multicast_startup_query_count_store(
 572         struct device *d, struct device_attribute *attr, const char *buf,
 573         size_t len)
 574 {
 575         return store_bridge_parm(d, buf, len, set_startup_query_count);
 576 }
 577 static DEVICE_ATTR_RW(multicast_startup_query_count);
 578
 579 static ssize_t multicast_last_member_interval_show(
 580         struct device *d, struct device_attribute *attr, char *buf)
 581 {
 582         struct net_bridge *br = to_bridge(d);
 583         return sprintf(buf, "%lu\n",
 584                        jiffies_to_clock_t(br->multicast_last_member_interval));
 585 }
 586
 587 static int set_last_member_interval(struct net_bridge *br, unsigned long val,
 588                                     struct netlink_ext_ack *extack)
 589 {
 590         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 591         return 0;
 592 }
 593
 594 static ssize_t multicast_last_member_interval_store(
 595         struct device *d, struct device_attribute *attr, const char *buf,
 596         size_t len)
 597 {
 598         return store_bridge_parm(d, buf, len, set_last_member_interval);
 599 }
 600 static DEVICE_ATTR_RW(multicast_last_member_interval);
 601
 602 static ssize_t multicast_membership_interval_show(
 603         struct device *d, struct device_attribute *attr, char *buf)
 604 {
 605         struct net_bridge *br = to_bridge(d);
 606         return sprintf(buf, "%lu\n",
 607                        jiffies_to_clock_t(br->multicast_membership_interval));
 608 }
 609
 610 static int set_membership_interval(struct net_bridge *br, unsigned long val,
 611                                    struct netlink_ext_ack *extack)
 612 {
 613         br->multicast_membership_interval = clock_t_to_jiffies(val);
 614         return 0;
 615 }
 616
 617 static ssize_t multicast_membership_interval_store(
 618         struct device *d, struct device_attribute *attr, const char *buf,
 619         size_t len)
 620 {
 621         return store_bridge_parm(d, buf, len, set_membership_interval);
 622 }
 623 static DEVICE_ATTR_RW(multicast_membership_interval);
 624
 625 static ssize_t multicast_querier_interval_show(struct device *d,
 626                                                struct device_attribute *attr,
 627                                                char *buf)
 628 {
 629         struct net_bridge *br = to_bridge(d);
 630         return sprintf(buf, "%lu\n",
 631                        jiffies_to_clock_t(br->multicast_querier_interval));
 632 }
 633
 634 static int set_querier_interval(struct net_bridge *br, unsigned long val,
 635                                 struct netlink_ext_ack *extack)
 636 {
 637         br->multicast_querier_interval = clock_t_to_jiffies(val);
 638         return 0;
 639 }
 640
 641 static ssize_t multicast_querier_interval_store(struct device *d,
 642                                                 struct device_attribute *attr,
 643                                                 const char *buf, size_t len)
 644 {
 645         return store_bridge_parm(d, buf, len, set_querier_interval);
 646 }
 647 static DEVICE_ATTR_RW(multicast_querier_interval);
 648
 649 static ssize_t multicast_query_interval_show(struct device *d,
 650                                              struct device_attribute *attr,
 651                                              char *buf)
 652 {
 653         struct net_bridge *br = to_bridge(d);
 654         return sprintf(buf, "%lu\n",
 655                        jiffies_to_clock_t(br->multicast_query_interval));
 656 }
 657
 658 static int set_query_interval(struct net_bridge *br, unsigned long val,
 659                               struct netlink_ext_ack *extack)
 660 {
 661         br->multicast_query_interval = clock_t_to_jiffies(val);
 662         return 0;
 663 }
 664
 665 static ssize_t multicast_query_interval_store(struct device *d,
 666                                               struct device_attribute *attr,
 667                                               const char *buf, size_t len)
 668 {
 669         return store_bridge_parm(d, buf, len, set_query_interval);
 670 }
 671 static DEVICE_ATTR_RW(multicast_query_interval);
 672
 673 static ssize_t multicast_query_response_interval_show(
 674         struct device *d, struct device_attribute *attr, char *buf)
 675 {
 676         struct net_bridge *br = to_bridge(d);
 677         return sprintf(
 678                 buf, "%lu\n",
 679                 jiffies_to_clock_t(br->multicast_query_response_interval));
 680 }
 681
 682 static int set_query_response_interval(struct net_bridge *br, unsigned long val,
 683                                        struct netlink_ext_ack *extack)
 684 {
 685         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 686         return 0;
 687 }
 688
 689 static ssize_t multicast_query_response_interval_store(
 690         struct device *d, struct device_attribute *attr, const char *buf,
 691         size_t len)
 692 {
 693         return store_bridge_parm(d, buf, len, set_query_response_interval);
 694 }
 695 static DEVICE_ATTR_RW(multicast_query_response_interval);
 696
 697 static ssize_t multicast_startup_query_interval_show(
 698         struct device *d, struct device_attribute *attr, char *buf)
 699 {
 700         struct net_bridge *br = to_bridge(d);
 701         return sprintf(
 702                 buf, "%lu\n",
 703                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 704 }
 705
 706 static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
 707                                       struct netlink_ext_ack *extack)
 708 {
 709         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 710         return 0;
 711 }
 712
 713 static ssize_t multicast_startup_query_interval_store(
 714         struct device *d, struct device_attribute *attr, const char *buf,
 715         size_t len)
 716 {
 717         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 718 }
 719 static DEVICE_ATTR_RW(multicast_startup_query_interval);
 720
 721 static ssize_t multicast_stats_enabled_show(struct device *d,
 722                                             struct device_attribute *attr,
 723                                             char *buf)
 724 {
 725         struct net_bridge *br = to_bridge(d);
 726
 727         return sprintf(buf, "%d\n",
 728                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
 729 }
 730
 731 static int set_stats_enabled(struct net_bridge *br, unsigned long val,
 732                              struct netlink_ext_ack *extack)
 733 {
 734         br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
 735         return 0;
 736 }
 737
 738 static ssize_t multicast_stats_enabled_store(struct device *d,
 739                                              struct device_attribute *attr,
 740                                              const char *buf,
 741                                              size_t len)
 742 {
 743         return store_bridge_parm(d, buf, len, set_stats_enabled);
 744 }
 745 static DEVICE_ATTR_RW(multicast_stats_enabled);
 746
 747 #if IS_ENABLED(CONFIG_IPV6)
 748 static ssize_t multicast_mld_version_show(struct device *d,
 749                                           struct device_attribute *attr,
 750                                           char *buf)
 751 {
 752         struct net_bridge *br = to_bridge(d);
 753
 754         return sprintf(buf, "%u\n", br->multicast_mld_version);
 755 }
 756
 757 static int set_multicast_mld_version(struct net_bridge *br, unsigned long val,
 758                                      struct netlink_ext_ack *extack)
 759 {
 760         return br_multicast_set_mld_version(br, val);
 761 }
 762
 763 static ssize_t multicast_mld_version_store(struct device *d,
 764                                            struct device_attribute *attr,
 765                                            const char *buf, size_t len)
 766 {
 767         return store_bridge_parm(d, buf, len, set_multicast_mld_version);
 768 }
 769 static DEVICE_ATTR_RW(multicast_mld_version);
 770 #endif
 771 #endif
 772 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 773 static ssize_t nf_call_iptables_show(
 774         struct device *d, struct device_attribute *attr, char *buf)
 775 {
 776         struct net_bridge *br = to_bridge(d);
 777         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES));
 778 }
 779
 780 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val,
 781                                 struct netlink_ext_ack *extack)
 782 {
 783         br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
 784         return 0;
 785 }
 786
 787 static ssize_t nf_call_iptables_store(
 788         struct device *d, struct device_attribute *attr, const char *buf,
 789         size_t len)
 790 {
 791         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 792 }
 793 static DEVICE_ATTR_RW(nf_call_iptables);
 794
 795 static ssize_t nf_call_ip6tables_show(
 796         struct device *d, struct device_attribute *attr, char *buf)
 797 {
 798         struct net_bridge *br = to_bridge(d);
 799         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES));
 800 }
 801
 802 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val,
 803                                  struct netlink_ext_ack *extack)
 804 {
 805         br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
 806         return 0;
 807 }
 808
 809 static ssize_t nf_call_ip6tables_store(
 810         struct device *d, struct device_attribute *attr, const char *buf,
 811         size_t len)
 812 {
 813         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 814 }
 815 static DEVICE_ATTR_RW(nf_call_ip6tables);
 816
 817 static ssize_t nf_call_arptables_show(
 818         struct device *d, struct device_attribute *attr, char *buf)
 819 {
 820         struct net_bridge *br = to_bridge(d);
 821         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
 822 }
 823
 824 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val,
 825                                  struct netlink_ext_ack *extack)
 826 {
 827         br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
 828         return 0;
 829 }
 830
 831 static ssize_t nf_call_arptables_store(
 832         struct device *d, struct device_attribute *attr, const char *buf,
 833         size_t len)
 834 {
 835         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 836 }
 837 static DEVICE_ATTR_RW(nf_call_arptables);
 838 #endif
 839 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 840 static ssize_t vlan_filtering_show(struct device *d,
 841                                    struct device_attribute *attr,
 842                                    char *buf)
 843 {
 844         struct net_bridge *br = to_bridge(d);
 845         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
 846 }
 847
 848 static ssize_t vlan_filtering_store(struct device *d,
 849                                     struct device_attribute *attr,
 850                                     const char *buf, size_t len)
 851 {
 852         return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
 853 }
 854 static DEVICE_ATTR_RW(vlan_filtering);
 855
 856 static ssize_t vlan_protocol_show(struct device *d,
 857                                   struct device_attribute *attr,
 858                                   char *buf)
 859 {
 860         struct net_bridge *br = to_bridge(d);
 861         return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
 862 }
 863
 864 static ssize_t vlan_protocol_store(struct device *d,
 865                                    struct device_attribute *attr,
 866                                    const char *buf, size_t len)
 867 {
 868         return store_bridge_parm(d, buf, len, br_vlan_set_proto);
 869 }
 870 static DEVICE_ATTR_RW(vlan_protocol);
 871
 872 static ssize_t default_pvid_show(struct device *d,
 873                                  struct device_attribute *attr,
 874                                  char *buf)
 875 {
 876         struct net_bridge *br = to_bridge(d);
 877         return sprintf(buf, "%d\n", br->default_pvid);
 878 }
 879
 880 static ssize_t default_pvid_store(struct device *d,
 881                                   struct device_attribute *attr,
 882                                   const char *buf, size_t len)
 883 {
 884         return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
 885 }
 886 static DEVICE_ATTR_RW(default_pvid);
 887
 888 static ssize_t vlan_stats_enabled_show(struct device *d,
 889                                        struct device_attribute *attr,
 890                                        char *buf)
 891 {
 892         struct net_bridge *br = to_bridge(d);
 893         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
 894 }
 895
 896 static int set_vlan_stats_enabled(struct net_bridge *br, unsigned long val,
 897                                   struct netlink_ext_ack *extack)
 898 {
 899         return br_vlan_set_stats(br, val);
 900 }
 901
 902 static ssize_t vlan_stats_enabled_store(struct device *d,
 903                                         struct device_attribute *attr,
 904                                         const char *buf, size_t len)
 905 {
 906         return store_bridge_parm(d, buf, len, set_vlan_stats_enabled);
 907 }
 908 static DEVICE_ATTR_RW(vlan_stats_enabled);
 909
 910 static ssize_t vlan_stats_per_port_show(struct device *d,
 911                                         struct device_attribute *attr,
 912                                         char *buf)
 913 {
 914         struct net_bridge *br = to_bridge(d);
 915         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
 916 }
 917
 918 static int set_vlan_stats_per_port(struct net_bridge *br, unsigned long val,
 919                                    struct netlink_ext_ack *extack)
 920 {
 921         return br_vlan_set_stats_per_port(br, val);
 922 }
 923
 924 static ssize_t vlan_stats_per_port_store(struct device *d,
 925                                          struct device_attribute *attr,
 926                                          const char *buf, size_t len)
 927 {
 928         return store_bridge_parm(d, buf, len, set_vlan_stats_per_port);
 929 }
 930 static DEVICE_ATTR_RW(vlan_stats_per_port);
 931 #endif
 932
 933 static struct attribute *bridge_attrs[] = {
 934         &dev_attr_forward_delay.attr,
 935         &dev_attr_hello_time.attr,
 936         &dev_attr_max_age.attr,
 937         &dev_attr_ageing_time.attr,
 938         &dev_attr_stp_state.attr,
 939         &dev_attr_group_fwd_mask.attr,
 940         &dev_attr_priority.attr,
 941         &dev_attr_bridge_id.attr,
 942         &dev_attr_root_id.attr,
 943         &dev_attr_root_path_cost.attr,
 944         &dev_attr_root_port.attr,
 945         &dev_attr_topology_change.attr,
 946         &dev_attr_topology_change_detected.attr,
 947         &dev_attr_hello_timer.attr,
 948         &dev_attr_tcn_timer.attr,
 949         &dev_attr_topology_change_timer.attr,
 950         &dev_attr_gc_timer.attr,
 951         &dev_attr_group_addr.attr,
 952         &dev_attr_flush.attr,
 953         &dev_attr_no_linklocal_learn.attr,
 954 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 955         &dev_attr_multicast_router.attr,
 956         &dev_attr_multicast_snooping.attr,
 957         &dev_attr_multicast_querier.attr,
 958         &dev_attr_multicast_query_use_ifaddr.attr,
 959         &dev_attr_hash_elasticity.attr,
 960         &dev_attr_hash_max.attr,
 961         &dev_attr_multicast_last_member_count.attr,
 962         &dev_attr_multicast_startup_query_count.attr,
 963         &dev_attr_multicast_last_member_interval.attr,
 964         &dev_attr_multicast_membership_interval.attr,
 965         &dev_attr_multicast_querier_interval.attr,
 966         &dev_attr_multicast_query_interval.attr,
 967         &dev_attr_multicast_query_response_interval.attr,
 968         &dev_attr_multicast_startup_query_interval.attr,
 969         &dev_attr_multicast_stats_enabled.attr,
 970         &dev_attr_multicast_igmp_version.attr,
 971 #if IS_ENABLED(CONFIG_IPV6)
 972         &dev_attr_multicast_mld_version.attr,
 973 #endif
 974 #endif
 975 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 976         &dev_attr_nf_call_iptables.attr,
 977         &dev_attr_nf_call_ip6tables.attr,
 978         &dev_attr_nf_call_arptables.attr,
 979 #endif
 980 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 981         &dev_attr_vlan_filtering.attr,
 982         &dev_attr_vlan_protocol.attr,
 983         &dev_attr_default_pvid.attr,
 984         &dev_attr_vlan_stats_enabled.attr,
 985         &dev_attr_vlan_stats_per_port.attr,
 986 #endif
 987         NULL
 988 };
 989
 990 static const struct attribute_group bridge_group = {
 991         .name = SYSFS_BRIDGE_ATTR,
 992         .attrs = bridge_attrs,
 993 };
 994
 995 /*
 996  * Export the forwarding information table as a binary file
 997  * The records are struct __fdb_entry.
 998  *
 999  * Returns the number of bytes read.
1000  */
1001 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
1002                               struct bin_attribute *bin_attr,
1003                               char *buf, loff_t off, size_t count)
1004 {
1005         struct device *dev = kobj_to_dev(kobj);
1006         struct net_bridge *br = to_bridge(dev);
1007         int n;
1008
1009         /* must read whole records */
1010         if (off % sizeof(struct __fdb_entry) != 0)
1011                 return -EINVAL;
1012
1013         n =  br_fdb_fillbuf(br, buf,
1014                             count / sizeof(struct __fdb_entry),
1015                             off / sizeof(struct __fdb_entry));
1016
1017         if (n > 0)
1018                 n *= sizeof(struct __fdb_entry);
1019
1020         return n;
1021 }
1022
1023 static struct bin_attribute bridge_forward = {
1024         .attr = { .name = SYSFS_BRIDGE_FDB,
1025                   .mode = 0444, },
1026         .read = brforward_read,
1027 };
1028
1029 /*
1030  * Add entries in sysfs onto the existing network class device
1031  * for the bridge.
1032  *   Adds a attribute group "bridge" containing tuning parameters.
1033  *   Binary attribute containing the forward table
1034  *   Sub directory to hold links to interfaces.
1035  *
1036  * Note: the ifobj exists only to be a subdirectory
1037  *   to hold links.  The ifobj exists in same data structure
1038  *   as it's parent the bridge so reference counting works.
1039  */
1040 int br_sysfs_addbr(struct net_device *dev)
1041 {
1042         struct kobject *brobj = &dev->dev.kobj;
1043         struct net_bridge *br = netdev_priv(dev);
1044         int err;
1045
1046         err = sysfs_create_group(brobj, &bridge_group);
1047         if (err) {
1048                 pr_info("%s: can't create group %s/%s\n",
1049                         __func__, dev->name, bridge_group.name);
1050                 goto out1;
1051         }
1052
1053         err = sysfs_create_bin_file(brobj, &bridge_forward);
1054         if (err) {
1055                 pr_info("%s: can't create attribute file %s/%s\n",
1056                         __func__, dev->name, bridge_forward.attr.name);
1057                 goto out2;
1058         }
1059
1060         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
1061         if (!br->ifobj) {
1062                 pr_info("%s: can't add kobject (directory) %s/%s\n",
1063                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
1064                 err = -ENOMEM;
1065                 goto out3;
1066         }
1067         return 0;
1068  out3:
1069         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
1070  out2:
1071         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
1072  out1:
1073         return err;
1074
1075 }
1076
1077 void br_sysfs_delbr(struct net_device *dev)
1078 {
1079         struct kobject *kobj = &dev->dev.kobj;
1080         struct net_bridge *br = netdev_priv(dev);
1081
1082         kobject_put(br->ifobj);
1083         sysfs_remove_bin_file(kobj, &bridge_forward);
1084         sysfs_remove_group(kobj, &bridge_group);
1085 }