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 */ 31static 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 66static 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 73static 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 79static 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} 85static DEVICE_ATTR_RW(forward_delay); 86 87static 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 94static 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 100static 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} 106static DEVICE_ATTR_RW(hello_time); 107 108static 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 115static 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 121static 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} 126static DEVICE_ATTR_RW(max_age); 127 128static 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 135static 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 141static 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} 147static DEVICE_ATTR_RW(ageing_time); 148 149static 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 157static 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 163static 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} 169static DEVICE_ATTR_RW(stp_state); 170 171static 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 179static 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 190static 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} 197static DEVICE_ATTR_RW(group_fwd_mask); 198 199static 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 207static 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 214static 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} 219static DEVICE_ATTR_RW(priority); 220 221static 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} 226static DEVICE_ATTR_RO(root_id); 227 228static 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} 233static DEVICE_ATTR_RO(bridge_id); 234 235static 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} 240static DEVICE_ATTR_RO(root_port); 241 242static 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} 247static DEVICE_ATTR_RO(root_path_cost); 248 249static 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} 254static DEVICE_ATTR_RO(topology_change); 255 256static 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} 263static DEVICE_ATTR_RO(topology_change_detected); 264 265static 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} 271static DEVICE_ATTR_RO(hello_timer); 272 273static 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} 279static DEVICE_ATTR_RO(tcn_timer); 280 281static 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} 288static DEVICE_ATTR_RO(topology_change_timer); 289 290static 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} 296static DEVICE_ATTR_RO(gc_timer); 297 298static 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 305static 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 342static DEVICE_ATTR_RW(group_addr); 343 344static 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 355static 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} 361static DEVICE_ATTR_WO(flush); 362 363static 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 371static 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 377static 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} 383static DEVICE_ATTR_RW(no_linklocal_learn); 384 385#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 386static 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 393static 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 399static 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} 405static DEVICE_ATTR_RW(multicast_router); 406 407static 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 415static 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} 421static DEVICE_ATTR_RW(multicast_snooping); 422 423static 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 432static 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 439static ssize_t 440multicast_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} 446static DEVICE_ATTR_RW(multicast_query_use_ifaddr); 447 448static 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 456static 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 462static 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} 468static DEVICE_ATTR_RW(multicast_querier); 469 470static 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 476static 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 485static 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} 491static DEVICE_ATTR_RW(hash_elasticity); 492 493static 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 500static 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 507static 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} 512static DEVICE_ATTR_RW(hash_max); 513 514static 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 523static 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 529static 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} 535static DEVICE_ATTR_RW(multicast_igmp_version); 536 537static 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 545static 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 552static 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} 558static DEVICE_ATTR_RW(multicast_last_member_count); 559 560static 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 567static 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 574static 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} 580static DEVICE_ATTR_RW(multicast_startup_query_count); 581 582static 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 590static 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 597static 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} 603static DEVICE_ATTR_RW(multicast_last_member_interval); 604 605static 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 613static 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 620static 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} 626static DEVICE_ATTR_RW(multicast_membership_interval); 627 628static 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 637static 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 644static 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} 650static DEVICE_ATTR_RW(multicast_querier_interval); 651 652static 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 661static 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 668static 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} 674static DEVICE_ATTR_RW(multicast_query_interval); 675 676static 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 685static 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 692static 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} 698static DEVICE_ATTR_RW(multicast_query_response_interval); 699 700static 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 709static 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 716static 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} 722static DEVICE_ATTR_RW(multicast_startup_query_interval); 723 724static 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 734static 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 741static 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} 748static DEVICE_ATTR_RW(multicast_stats_enabled); 749 750#if IS_ENABLED(CONFIG_IPV6) 751static 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 760static 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 766static 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} 772static DEVICE_ATTR_RW(multicast_mld_version); 773#endif 774#endif 775#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 776static 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 783static 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 790static 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} 796static DEVICE_ATTR_RW(nf_call_iptables); 797 798static 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 805static 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 812static 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} 818static DEVICE_ATTR_RW(nf_call_ip6tables); 819 820static 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 827static 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 834static 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} 840static DEVICE_ATTR_RW(nf_call_arptables); 841#endif 842#ifdef CONFIG_BRIDGE_VLAN_FILTERING 843static 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 851static 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} 857static DEVICE_ATTR_RW(vlan_filtering); 858 859static 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 867static 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} 873static DEVICE_ATTR_RW(vlan_protocol); 874 875static 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 883static 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} 889static DEVICE_ATTR_RW(default_pvid); 890 891static 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 899static 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 905static 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} 911static DEVICE_ATTR_RW(vlan_stats_enabled); 912 913static 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 921static 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 927static 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} 933static DEVICE_ATTR_RW(vlan_stats_per_port); 934#endif 935 936static 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 993static 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 */ 1004static 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 1026static 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 */ 1043int 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 1080void 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} 1089