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         br_fdb_flush(br);
 348         return 0;
 349 }
 350
 351 static ssize_t flush_store(struct device *d,
 352                            struct device_attribute *attr,
 353                            const char *buf, size_t len)
 354 {
 355         return store_bridge_parm(d, buf, len, set_flush);
 356 }
 357 static DEVICE_ATTR_WO(flush);
 358
 359 static ssize_t no_linklocal_learn_show(struct device *d,
 360                                        struct device_attribute *attr,
 361                                        char *buf)
 362 {
 363         struct net_bridge *br = to_bridge(d);
 364         return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN));
 365 }
 366
 367 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val,
 368                                   struct netlink_ext_ack *extack)
 369 {
 370         return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, extack);
 371 }
 372
 373 static ssize_t no_linklocal_learn_store(struct device *d,
 374                                         struct device_attribute *attr,
 375                                         const char *buf, size_t len)
 376 {
 377         return store_bridge_parm(d, buf, len, set_no_linklocal_learn);
 378 }
 379 static DEVICE_ATTR_RW(no_linklocal_learn);
 380
 381 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 382 static ssize_t multicast_router_show(struct device *d,
 383                                      struct device_attribute *attr, char *buf)
 384 {
 385         struct net_bridge *br = to_bridge(d);
 386         return sprintf(buf, "%d\n", br->multicast_ctx.multicast_router);
 387 }
 388
 389 static int set_multicast_router(struct net_bridge *br, unsigned long val,
 390                                 struct netlink_ext_ack *extack)
 391 {
 392         return br_multicast_set_router(&br->multicast_ctx, val);
 393 }
 394
 395 static ssize_t multicast_router_store(struct device *d,
 396                                       struct device_attribute *attr,
 397                                       const char *buf, size_t len)
 398 {
 399         return store_bridge_parm(d, buf, len, set_multicast_router);
 400 }
 401 static DEVICE_ATTR_RW(multicast_router);
 402
 403 static ssize_t multicast_snooping_show(struct device *d,
 404                                        struct device_attribute *attr,
 405                                        char *buf)
 406 {
 407         struct net_bridge *br = to_bridge(d);
 408         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED));
 409 }
 410
 411 static ssize_t multicast_snooping_store(struct device *d,
 412                                         struct device_attribute *attr,
 413                                         const char *buf, size_t len)
 414 {
 415         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 416 }
 417 static DEVICE_ATTR_RW(multicast_snooping);
 418
 419 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
 420                                                struct device_attribute *attr,
 421                                                char *buf)
 422 {
 423         struct net_bridge *br = to_bridge(d);
 424         return sprintf(buf, "%d\n",
 425                        br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
 426 }
 427
 428 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val,
 429                                 struct netlink_ext_ack *extack)
 430 {
 431         br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
 432         return 0;
 433 }
 434
 435 static ssize_t
 436 multicast_query_use_ifaddr_store(struct device *d,
 437                                  struct device_attribute *attr,
 438                                  const char *buf, size_t len)
 439 {
 440         return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
 441 }
 442 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
 443
 444 static ssize_t multicast_querier_show(struct device *d,
 445                                       struct device_attribute *attr,
 446                                       char *buf)
 447 {
 448         struct net_bridge *br = to_bridge(d);
 449         return sprintf(buf, "%d\n", br->multicast_ctx.multicast_querier);
 450 }
 451
 452 static int set_multicast_querier(struct net_bridge *br, unsigned long val,
 453                                  struct netlink_ext_ack *extack)
 454 {
 455         return br_multicast_set_querier(&br->multicast_ctx, val);
 456 }
 457
 458 static ssize_t multicast_querier_store(struct device *d,
 459                                        struct device_attribute *attr,
 460                                        const char *buf, size_t len)
 461 {
 462         return store_bridge_parm(d, buf, len, set_multicast_querier);
 463 }
 464 static DEVICE_ATTR_RW(multicast_querier);
 465
 466 static ssize_t hash_elasticity_show(struct device *d,
 467                                     struct device_attribute *attr, char *buf)
 468 {
 469         return sprintf(buf, "%u\n", RHT_ELASTICITY);
 470 }
 471
 472 static int set_elasticity(struct net_bridge *br, unsigned long val,
 473                           struct netlink_ext_ack *extack)
 474 {
 475         /* 16 is RHT_ELASTICITY */
 476         NL_SET_ERR_MSG_MOD(extack,
 477                            "the hash_elasticity option has been deprecated and is always 16");
 478         return 0;
 479 }
 480
 481 static ssize_t hash_elasticity_store(struct device *d,
 482                                      struct device_attribute *attr,
 483                                      const char *buf, size_t len)
 484 {
 485         return store_bridge_parm(d, buf, len, set_elasticity);
 486 }
 487 static DEVICE_ATTR_RW(hash_elasticity);
 488
 489 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
 490                              char *buf)
 491 {
 492         struct net_bridge *br = to_bridge(d);
 493         return sprintf(buf, "%u\n", br->hash_max);
 494 }
 495
 496 static int set_hash_max(struct net_bridge *br, unsigned long val,
 497                         struct netlink_ext_ack *extack)
 498 {
 499         br->hash_max = val;
 500         return 0;
 501 }
 502
 503 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
 504                               const char *buf, size_t len)
 505 {
 506         return store_bridge_parm(d, buf, len, set_hash_max);
 507 }
 508 static DEVICE_ATTR_RW(hash_max);
 509
 510 static ssize_t multicast_igmp_version_show(struct device *d,
 511                                            struct device_attribute *attr,
 512                                            char *buf)
 513 {
 514         struct net_bridge *br = to_bridge(d);
 515
 516         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_igmp_version);
 517 }
 518
 519 static int set_multicast_igmp_version(struct net_bridge *br, unsigned long val,
 520                                       struct netlink_ext_ack *extack)
 521 {
 522         return br_multicast_set_igmp_version(&br->multicast_ctx, val);
 523 }
 524
 525 static ssize_t multicast_igmp_version_store(struct device *d,
 526                                             struct device_attribute *attr,
 527                                             const char *buf, size_t len)
 528 {
 529         return store_bridge_parm(d, buf, len, set_multicast_igmp_version);
 530 }
 531 static DEVICE_ATTR_RW(multicast_igmp_version);
 532
 533 static ssize_t multicast_last_member_count_show(struct device *d,
 534                                                 struct device_attribute *attr,
 535                                                 char *buf)
 536 {
 537         struct net_bridge *br = to_bridge(d);
 538         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_last_member_count);
 539 }
 540
 541 static int set_last_member_count(struct net_bridge *br, unsigned long val,
 542                                  struct netlink_ext_ack *extack)
 543 {
 544         br->multicast_ctx.multicast_last_member_count = val;
 545         return 0;
 546 }
 547
 548 static ssize_t multicast_last_member_count_store(struct device *d,
 549                                                  struct device_attribute *attr,
 550                                                  const char *buf, size_t len)
 551 {
 552         return store_bridge_parm(d, buf, len, set_last_member_count);
 553 }
 554 static DEVICE_ATTR_RW(multicast_last_member_count);
 555
 556 static ssize_t multicast_startup_query_count_show(
 557         struct device *d, struct device_attribute *attr, char *buf)
 558 {
 559         struct net_bridge *br = to_bridge(d);
 560         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_startup_query_count);
 561 }
 562
 563 static int set_startup_query_count(struct net_bridge *br, unsigned long val,
 564                                    struct netlink_ext_ack *extack)
 565 {
 566         br->multicast_ctx.multicast_startup_query_count = val;
 567         return 0;
 568 }
 569
 570 static ssize_t multicast_startup_query_count_store(
 571         struct device *d, struct device_attribute *attr, const char *buf,
 572         size_t len)
 573 {
 574         return store_bridge_parm(d, buf, len, set_startup_query_count);
 575 }
 576 static DEVICE_ATTR_RW(multicast_startup_query_count);
 577
 578 static ssize_t multicast_last_member_interval_show(
 579         struct device *d, struct device_attribute *attr, char *buf)
 580 {
 581         struct net_bridge *br = to_bridge(d);
 582         return sprintf(buf, "%lu\n",
 583                        jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval));
 584 }
 585
 586 static int set_last_member_interval(struct net_bridge *br, unsigned long val,
 587                                     struct netlink_ext_ack *extack)
 588 {
 589         br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
 590         return 0;
 591 }
 592
 593 static ssize_t multicast_last_member_interval_store(
 594         struct device *d, struct device_attribute *attr, const char *buf,
 595         size_t len)
 596 {
 597         return store_bridge_parm(d, buf, len, set_last_member_interval);
 598 }
 599 static DEVICE_ATTR_RW(multicast_last_member_interval);
 600
 601 static ssize_t multicast_membership_interval_show(
 602         struct device *d, struct device_attribute *attr, char *buf)
 603 {
 604         struct net_bridge *br = to_bridge(d);
 605         return sprintf(buf, "%lu\n",
 606                        jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval));
 607 }
 608
 609 static int set_membership_interval(struct net_bridge *br, unsigned long val,
 610                                    struct netlink_ext_ack *extack)
 611 {
 612         br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
 613         return 0;
 614 }
 615
 616 static ssize_t multicast_membership_interval_store(
 617         struct device *d, struct device_attribute *attr, const char *buf,
 618         size_t len)
 619 {
 620         return store_bridge_parm(d, buf, len, set_membership_interval);
 621 }
 622 static DEVICE_ATTR_RW(multicast_membership_interval);
 623
 624 static ssize_t multicast_querier_interval_show(struct device *d,
 625                                                struct device_attribute *attr,
 626                                                char *buf)
 627 {
 628         struct net_bridge *br = to_bridge(d);
 629         return sprintf(buf, "%lu\n",
 630                        jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval));
 631 }
 632
 633 static int set_querier_interval(struct net_bridge *br, unsigned long val,
 634                                 struct netlink_ext_ack *extack)
 635 {
 636         br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
 637         return 0;
 638 }
 639
 640 static ssize_t multicast_querier_interval_store(struct device *d,
 641                                                 struct device_attribute *attr,
 642                                                 const char *buf, size_t len)
 643 {
 644         return store_bridge_parm(d, buf, len, set_querier_interval);
 645 }
 646 static DEVICE_ATTR_RW(multicast_querier_interval);
 647
 648 static ssize_t multicast_query_interval_show(struct device *d,
 649                                              struct device_attribute *attr,
 650                                              char *buf)
 651 {
 652         struct net_bridge *br = to_bridge(d);
 653         return sprintf(buf, "%lu\n",
 654                        jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval));
 655 }
 656
 657 static int set_query_interval(struct net_bridge *br, unsigned long val,
 658                               struct netlink_ext_ack *extack)
 659 {
 660         br_multicast_set_query_intvl(&br->multicast_ctx, val);
 661         return 0;
 662 }
 663
 664 static ssize_t multicast_query_interval_store(struct device *d,
 665                                               struct device_attribute *attr,
 666                                               const char *buf, size_t len)
 667 {
 668         return store_bridge_parm(d, buf, len, set_query_interval);
 669 }
 670 static DEVICE_ATTR_RW(multicast_query_interval);
 671
 672 static ssize_t multicast_query_response_interval_show(
 673         struct device *d, struct device_attribute *attr, char *buf)
 674 {
 675         struct net_bridge *br = to_bridge(d);
 676         return sprintf(
 677                 buf, "%lu\n",
 678                 jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval));
 679 }
 680
 681 static int set_query_response_interval(struct net_bridge *br, unsigned long val,
 682                                        struct netlink_ext_ack *extack)
 683 {
 684         br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
 685         return 0;
 686 }
 687
 688 static ssize_t multicast_query_response_interval_store(
 689         struct device *d, struct device_attribute *attr, const char *buf,
 690         size_t len)
 691 {
 692         return store_bridge_parm(d, buf, len, set_query_response_interval);
 693 }
 694 static DEVICE_ATTR_RW(multicast_query_response_interval);
 695
 696 static ssize_t multicast_startup_query_interval_show(
 697         struct device *d, struct device_attribute *attr, char *buf)
 698 {
 699         struct net_bridge *br = to_bridge(d);
 700         return sprintf(
 701                 buf, "%lu\n",
 702                 jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval));
 703 }
 704
 705 static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
 706                                       struct netlink_ext_ack *extack)
 707 {
 708         br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
 709         return 0;
 710 }
 711
 712 static ssize_t multicast_startup_query_interval_store(
 713         struct device *d, struct device_attribute *attr, const char *buf,
 714         size_t len)
 715 {
 716         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 717 }
 718 static DEVICE_ATTR_RW(multicast_startup_query_interval);
 719
 720 static ssize_t multicast_stats_enabled_show(struct device *d,
 721                                             struct device_attribute *attr,
 722                                             char *buf)
 723 {
 724         struct net_bridge *br = to_bridge(d);
 725
 726         return sprintf(buf, "%d\n",
 727                        br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
 728 }
 729
 730 static int set_stats_enabled(struct net_bridge *br, unsigned long val,
 731                              struct netlink_ext_ack *extack)
 732 {
 733         br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
 734         return 0;
 735 }
 736
 737 static ssize_t multicast_stats_enabled_store(struct device *d,
 738                                              struct device_attribute *attr,
 739                                              const char *buf,
 740                                              size_t len)
 741 {
 742         return store_bridge_parm(d, buf, len, set_stats_enabled);
 743 }
 744 static DEVICE_ATTR_RW(multicast_stats_enabled);
 745
 746 #if IS_ENABLED(CONFIG_IPV6)
 747 static ssize_t multicast_mld_version_show(struct device *d,
 748                                           struct device_attribute *attr,
 749                                           char *buf)
 750 {
 751         struct net_bridge *br = to_bridge(d);
 752
 753         return sprintf(buf, "%u\n", br->multicast_ctx.multicast_mld_version);
 754 }
 755
 756 static int set_multicast_mld_version(struct net_bridge *br, unsigned long val,
 757                                      struct netlink_ext_ack *extack)
 758 {
 759         return br_multicast_set_mld_version(&br->multicast_ctx, val);
 760 }
 761
 762 static ssize_t multicast_mld_version_store(struct device *d,
 763                                            struct device_attribute *attr,
 764                                            const char *buf, size_t len)
 765 {
 766         return store_bridge_parm(d, buf, len, set_multicast_mld_version);
 767 }
 768 static DEVICE_ATTR_RW(multicast_mld_version);
 769 #endif
 770 #endif
 771 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 772 static ssize_t nf_call_iptables_show(
 773         struct device *d, struct device_attribute *attr, char *buf)
 774 {
 775         struct net_bridge *br = to_bridge(d);
 776         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES));
 777 }
 778
 779 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val,
 780                                 struct netlink_ext_ack *extack)
 781 {
 782         br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
 783         return 0;
 784 }
 785
 786 static ssize_t nf_call_iptables_store(
 787         struct device *d, struct device_attribute *attr, const char *buf,
 788         size_t len)
 789 {
 790         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 791 }
 792 static DEVICE_ATTR_RW(nf_call_iptables);
 793
 794 static ssize_t nf_call_ip6tables_show(
 795         struct device *d, struct device_attribute *attr, char *buf)
 796 {
 797         struct net_bridge *br = to_bridge(d);
 798         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES));
 799 }
 800
 801 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val,
 802                                  struct netlink_ext_ack *extack)
 803 {
 804         br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
 805         return 0;
 806 }
 807
 808 static ssize_t nf_call_ip6tables_store(
 809         struct device *d, struct device_attribute *attr, const char *buf,
 810         size_t len)
 811 {
 812         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 813 }
 814 static DEVICE_ATTR_RW(nf_call_ip6tables);
 815
 816 static ssize_t nf_call_arptables_show(
 817         struct device *d, struct device_attribute *attr, char *buf)
 818 {
 819         struct net_bridge *br = to_bridge(d);
 820         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
 821 }
 822
 823 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val,
 824                                  struct netlink_ext_ack *extack)
 825 {
 826         br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
 827         return 0;
 828 }
 829
 830 static ssize_t nf_call_arptables_store(
 831         struct device *d, struct device_attribute *attr, const char *buf,
 832         size_t len)
 833 {
 834         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 835 }
 836 static DEVICE_ATTR_RW(nf_call_arptables);
 837 #endif
 838 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 839 static ssize_t vlan_filtering_show(struct device *d,
 840                                    struct device_attribute *attr,
 841                                    char *buf)
 842 {
 843         struct net_bridge *br = to_bridge(d);
 844         return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
 845 }
 846
 847 static ssize_t vlan_filtering_store(struct device *d,
 848                                     struct device_attribute *attr,
 849                                     const char *buf, size_t len)
 850 {
 851         return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
 852 }
 853 static DEVICE_ATTR_RW(vlan_filtering);
 854
 855 static ssize_t vlan_protocol_show(struct device *d,
 856                                   struct device_attribute *attr,
 857                                   char *buf)
 858 {
 859         struct net_bridge *br = to_bridge(d);
 860         return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
 861 }
 862
 863 static ssize_t vlan_protocol_store(struct device *d,
 864                                    struct device_attribute *attr,
 865                                    const char *buf, size_t len)
 866 {
 867         return store_bridge_parm(d, buf, len, br_vlan_set_proto);
 868 }
 869 static DEVICE_ATTR_RW(vlan_protocol);
 870
 871 static ssize_t default_pvid_show(struct device *d,
 872                                  struct device_attribute *attr,
 873                                  char *buf)
 874 {
 875         struct net_bridge *br = to_bridge(d);
 876         return sprintf(buf, "%d\n", br->default_pvid);
 877 }
 878
 879 static ssize_t default_pvid_store(struct device *d,
 880                                   struct device_attribute *attr,
 881                                   const char *buf, size_t len)
 882 {
 883         return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
 884 }
 885 static DEVICE_ATTR_RW(default_pvid);
 886
 887 static ssize_t vlan_stats_enabled_show(struct device *d,
 888                                        struct device_attribute *attr,
 889                                        char *buf)
 890 {
 891         struct net_bridge *br = to_bridge(d);
 892         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
 893 }
 894
 895 static int set_vlan_stats_enabled(struct net_bridge *br, unsigned long val,
 896                                   struct netlink_ext_ack *extack)
 897 {
 898         return br_vlan_set_stats(br, val);
 899 }
 900
 901 static ssize_t vlan_stats_enabled_store(struct device *d,
 902                                         struct device_attribute *attr,
 903                                         const char *buf, size_t len)
 904 {
 905         return store_bridge_parm(d, buf, len, set_vlan_stats_enabled);
 906 }
 907 static DEVICE_ATTR_RW(vlan_stats_enabled);
 908
 909 static ssize_t vlan_stats_per_port_show(struct device *d,
 910                                         struct device_attribute *attr,
 911                                         char *buf)
 912 {
 913         struct net_bridge *br = to_bridge(d);
 914         return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
 915 }
 916
 917 static int set_vlan_stats_per_port(struct net_bridge *br, unsigned long val,
 918                                    struct netlink_ext_ack *extack)
 919 {
 920         return br_vlan_set_stats_per_port(br, val);
 921 }
 922
 923 static ssize_t vlan_stats_per_port_store(struct device *d,
 924                                          struct device_attribute *attr,
 925                                          const char *buf, size_t len)
 926 {
 927         return store_bridge_parm(d, buf, len, set_vlan_stats_per_port);
 928 }
 929 static DEVICE_ATTR_RW(vlan_stats_per_port);
 930 #endif
 931
 932 static struct attribute *bridge_attrs[] = {
 933         &dev_attr_forward_delay.attr,
 934         &dev_attr_hello_time.attr,
 935         &dev_attr_max_age.attr,
 936         &dev_attr_ageing_time.attr,
 937         &dev_attr_stp_state.attr,
 938         &dev_attr_group_fwd_mask.attr,
 939         &dev_attr_priority.attr,
 940         &dev_attr_bridge_id.attr,
 941         &dev_attr_root_id.attr,
 942         &dev_attr_root_path_cost.attr,
 943         &dev_attr_root_port.attr,
 944         &dev_attr_topology_change.attr,
 945         &dev_attr_topology_change_detected.attr,
 946         &dev_attr_hello_timer.attr,
 947         &dev_attr_tcn_timer.attr,
 948         &dev_attr_topology_change_timer.attr,
 949         &dev_attr_gc_timer.attr,
 950         &dev_attr_group_addr.attr,
 951         &dev_attr_flush.attr,
 952         &dev_attr_no_linklocal_learn.attr,
 953 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 954         &dev_attr_multicast_router.attr,
 955         &dev_attr_multicast_snooping.attr,
 956         &dev_attr_multicast_querier.attr,
 957         &dev_attr_multicast_query_use_ifaddr.attr,
 958         &dev_attr_hash_elasticity.attr,
 959         &dev_attr_hash_max.attr,
 960         &dev_attr_multicast_last_member_count.attr,
 961         &dev_attr_multicast_startup_query_count.attr,
 962         &dev_attr_multicast_last_member_interval.attr,
 963         &dev_attr_multicast_membership_interval.attr,
 964         &dev_attr_multicast_querier_interval.attr,
 965         &dev_attr_multicast_query_interval.attr,
 966         &dev_attr_multicast_query_response_interval.attr,
 967         &dev_attr_multicast_startup_query_interval.attr,
 968         &dev_attr_multicast_stats_enabled.attr,
 969         &dev_attr_multicast_igmp_version.attr,
 970 #if IS_ENABLED(CONFIG_IPV6)
 971         &dev_attr_multicast_mld_version.attr,
 972 #endif
 973 #endif
 974 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 975         &dev_attr_nf_call_iptables.attr,
 976         &dev_attr_nf_call_ip6tables.attr,
 977         &dev_attr_nf_call_arptables.attr,
 978 #endif
 979 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 980         &dev_attr_vlan_filtering.attr,
 981         &dev_attr_vlan_protocol.attr,
 982         &dev_attr_default_pvid.attr,
 983         &dev_attr_vlan_stats_enabled.attr,
 984         &dev_attr_vlan_stats_per_port.attr,
 985 #endif
 986         NULL
 987 };
 988
 989 static const struct attribute_group bridge_group = {
 990         .name = SYSFS_BRIDGE_ATTR,
 991         .attrs = bridge_attrs,
 992 };
 993
 994 /*
 995  * Export the forwarding information table as a binary file
 996  * The records are struct __fdb_entry.
 997  *
 998  * Returns the number of bytes read.
 999  */
1000 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
1001                               struct bin_attribute *bin_attr,
1002                               char *buf, loff_t off, size_t count)
1003 {
1004         struct device *dev = kobj_to_dev(kobj);
1005         struct net_bridge *br = to_bridge(dev);
1006         int n;
1007
1008         /* must read whole records */
1009         if (off % sizeof(struct __fdb_entry) != 0)
1010                 return -EINVAL;
1011
1012         n =  br_fdb_fillbuf(br, buf,
1013                             count / sizeof(struct __fdb_entry),
1014                             off / sizeof(struct __fdb_entry));
1015
1016         if (n > 0)
1017                 n *= sizeof(struct __fdb_entry);
1018
1019         return n;
1020 }
1021
1022 static struct bin_attribute bridge_forward = {
1023         .attr = { .name = SYSFS_BRIDGE_FDB,
1024                   .mode = 0444, },
1025         .read = brforward_read,
1026 };
1027
1028 /*
1029  * Add entries in sysfs onto the existing network class device
1030  * for the bridge.
1031  *   Adds a attribute group "bridge" containing tuning parameters.
1032  *   Binary attribute containing the forward table
1033  *   Sub directory to hold links to interfaces.
1034  *
1035  * Note: the ifobj exists only to be a subdirectory
1036  *   to hold links.  The ifobj exists in same data structure
1037  *   as it's parent the bridge so reference counting works.
1038  */
1039 int br_sysfs_addbr(struct net_device *dev)
1040 {
1041         struct kobject *brobj = &dev->dev.kobj;
1042         struct net_bridge *br = netdev_priv(dev);
1043         int err;
1044
1045         err = sysfs_create_group(brobj, &bridge_group);
1046         if (err) {
1047                 pr_info("%s: can't create group %s/%s\n",
1048                         __func__, dev->name, bridge_group.name);
1049                 goto out1;
1050         }
1051
1052         err = sysfs_create_bin_file(brobj, &bridge_forward);
1053         if (err) {
1054                 pr_info("%s: can't create attribute file %s/%s\n",
1055                         __func__, dev->name, bridge_forward.attr.name);
1056                 goto out2;
1057         }
1058
1059         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
1060         if (!br->ifobj) {
1061                 pr_info("%s: can't add kobject (directory) %s/%s\n",
1062                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
1063                 err = -ENOMEM;
1064                 goto out3;
1065         }
1066         return 0;
1067  out3:
1068         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
1069  out2:
1070         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
1071  out1:
1072         return err;
1073
1074 }
1075
1076 void br_sysfs_delbr(struct net_device *dev)
1077 {
1078         struct kobject *kobj = &dev->dev.kobj;
1079         struct net_bridge *br = netdev_priv(dev);
1080
1081         kobject_put(br->ifobj);
1082         sysfs_remove_bin_file(kobj, &bridge_forward);
1083         sysfs_remove_group(kobj, &bridge_group);
1084 }