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