1 /* 2 * Sysfs attributes of bridge 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Stephen Hemminger <shemminger@osdl.org> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 11 * 2 of the License, or (at your option) any later version. 12 */ 13 14 #include <linux/capability.h> 15 #include <linux/kernel.h> 16 #include <linux/netdevice.h> 17 #include <linux/etherdevice.h> 18 #include <linux/if_bridge.h> 19 #include <linux/rtnetlink.h> 20 #include <linux/spinlock.h> 21 #include <linux/times.h> 22 #include <linux/sched/signal.h> 23 24 #include "br_private.h" 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 *, unsigned long)) 34 { 35 struct net_bridge *br = to_bridge(d); 36 char *endp; 37 unsigned long val; 38 int err; 39 40 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN)) 41 return -EPERM; 42 43 val = simple_strtoul(buf, &endp, 0); 44 if (endp == buf) 45 return -EINVAL; 46 47 if (!rtnl_trylock()) 48 return restart_syscall(); 49 50 err = (*set)(br, val); 51 if (!err) 52 netdev_state_change(br->dev); 53 rtnl_unlock(); 54 55 return err ? err : len; 56 } 57 58 59 static ssize_t forward_delay_show(struct device *d, 60 struct device_attribute *attr, char *buf) 61 { 62 struct net_bridge *br = to_bridge(d); 63 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay)); 64 } 65 66 static ssize_t forward_delay_store(struct device *d, 67 struct device_attribute *attr, 68 const char *buf, size_t len) 69 { 70 return store_bridge_parm(d, buf, len, br_set_forward_delay); 71 } 72 static DEVICE_ATTR_RW(forward_delay); 73 74 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr, 75 char *buf) 76 { 77 return sprintf(buf, "%lu\n", 78 jiffies_to_clock_t(to_bridge(d)->hello_time)); 79 } 80 81 static ssize_t hello_time_store(struct device *d, 82 struct device_attribute *attr, const char *buf, 83 size_t len) 84 { 85 return store_bridge_parm(d, buf, len, br_set_hello_time); 86 } 87 static DEVICE_ATTR_RW(hello_time); 88 89 static ssize_t max_age_show(struct device *d, struct device_attribute *attr, 90 char *buf) 91 { 92 return sprintf(buf, "%lu\n", 93 jiffies_to_clock_t(to_bridge(d)->max_age)); 94 } 95 96 static ssize_t max_age_store(struct device *d, struct device_attribute *attr, 97 const char *buf, size_t len) 98 { 99 return store_bridge_parm(d, buf, len, br_set_max_age); 100 } 101 static DEVICE_ATTR_RW(max_age); 102 103 static ssize_t ageing_time_show(struct device *d, 104 struct device_attribute *attr, char *buf) 105 { 106 struct net_bridge *br = to_bridge(d); 107 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time)); 108 } 109 110 static int set_ageing_time(struct net_bridge *br, unsigned long val) 111 { 112 return br_set_ageing_time(br, val); 113 } 114 115 static ssize_t ageing_time_store(struct device *d, 116 struct device_attribute *attr, 117 const char *buf, size_t len) 118 { 119 return store_bridge_parm(d, buf, len, set_ageing_time); 120 } 121 static DEVICE_ATTR_RW(ageing_time); 122 123 static ssize_t stp_state_show(struct device *d, 124 struct device_attribute *attr, char *buf) 125 { 126 struct net_bridge *br = to_bridge(d); 127 return sprintf(buf, "%d\n", br->stp_enabled); 128 } 129 130 131 static int set_stp_state(struct net_bridge *br, unsigned long val) 132 { 133 br_stp_set_enabled(br, val); 134 135 return 0; 136 } 137 138 static ssize_t stp_state_store(struct device *d, 139 struct device_attribute *attr, const char *buf, 140 size_t len) 141 { 142 return store_bridge_parm(d, buf, len, set_stp_state); 143 } 144 static DEVICE_ATTR_RW(stp_state); 145 146 static ssize_t group_fwd_mask_show(struct device *d, 147 struct device_attribute *attr, 148 char *buf) 149 { 150 struct net_bridge *br = to_bridge(d); 151 return sprintf(buf, "%#x\n", br->group_fwd_mask); 152 } 153 154 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val) 155 { 156 if (val & BR_GROUPFWD_RESTRICTED) 157 return -EINVAL; 158 159 br->group_fwd_mask = val; 160 161 return 0; 162 } 163 164 static ssize_t group_fwd_mask_store(struct device *d, 165 struct device_attribute *attr, 166 const char *buf, 167 size_t len) 168 { 169 return store_bridge_parm(d, buf, len, set_group_fwd_mask); 170 } 171 static DEVICE_ATTR_RW(group_fwd_mask); 172 173 static ssize_t priority_show(struct device *d, struct device_attribute *attr, 174 char *buf) 175 { 176 struct net_bridge *br = to_bridge(d); 177 return sprintf(buf, "%d\n", 178 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]); 179 } 180 181 static int set_priority(struct net_bridge *br, unsigned long val) 182 { 183 br_stp_set_bridge_priority(br, (u16) val); 184 return 0; 185 } 186 187 static ssize_t priority_store(struct device *d, struct device_attribute *attr, 188 const char *buf, size_t len) 189 { 190 return store_bridge_parm(d, buf, len, set_priority); 191 } 192 static DEVICE_ATTR_RW(priority); 193 194 static ssize_t root_id_show(struct device *d, struct device_attribute *attr, 195 char *buf) 196 { 197 return br_show_bridge_id(buf, &to_bridge(d)->designated_root); 198 } 199 static DEVICE_ATTR_RO(root_id); 200 201 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr, 202 char *buf) 203 { 204 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id); 205 } 206 static DEVICE_ATTR_RO(bridge_id); 207 208 static ssize_t root_port_show(struct device *d, struct device_attribute *attr, 209 char *buf) 210 { 211 return sprintf(buf, "%d\n", to_bridge(d)->root_port); 212 } 213 static DEVICE_ATTR_RO(root_port); 214 215 static ssize_t root_path_cost_show(struct device *d, 216 struct device_attribute *attr, char *buf) 217 { 218 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost); 219 } 220 static DEVICE_ATTR_RO(root_path_cost); 221 222 static ssize_t topology_change_show(struct device *d, 223 struct device_attribute *attr, char *buf) 224 { 225 return sprintf(buf, "%d\n", to_bridge(d)->topology_change); 226 } 227 static DEVICE_ATTR_RO(topology_change); 228 229 static ssize_t topology_change_detected_show(struct device *d, 230 struct device_attribute *attr, 231 char *buf) 232 { 233 struct net_bridge *br = to_bridge(d); 234 return sprintf(buf, "%d\n", br->topology_change_detected); 235 } 236 static DEVICE_ATTR_RO(topology_change_detected); 237 238 static ssize_t hello_timer_show(struct device *d, 239 struct device_attribute *attr, char *buf) 240 { 241 struct net_bridge *br = to_bridge(d); 242 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer)); 243 } 244 static DEVICE_ATTR_RO(hello_timer); 245 246 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr, 247 char *buf) 248 { 249 struct net_bridge *br = to_bridge(d); 250 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer)); 251 } 252 static DEVICE_ATTR_RO(tcn_timer); 253 254 static ssize_t topology_change_timer_show(struct device *d, 255 struct device_attribute *attr, 256 char *buf) 257 { 258 struct net_bridge *br = to_bridge(d); 259 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer)); 260 } 261 static DEVICE_ATTR_RO(topology_change_timer); 262 263 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr, 264 char *buf) 265 { 266 struct net_bridge *br = to_bridge(d); 267 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer)); 268 } 269 static DEVICE_ATTR_RO(gc_timer); 270 271 static ssize_t group_addr_show(struct device *d, 272 struct device_attribute *attr, char *buf) 273 { 274 struct net_bridge *br = to_bridge(d); 275 return sprintf(buf, "%pM\n", br->group_addr); 276 } 277 278 static ssize_t group_addr_store(struct device *d, 279 struct device_attribute *attr, 280 const char *buf, size_t len) 281 { 282 struct net_bridge *br = to_bridge(d); 283 u8 new_addr[6]; 284 285 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN)) 286 return -EPERM; 287 288 if (!mac_pton(buf, new_addr)) 289 return -EINVAL; 290 291 if (!is_link_local_ether_addr(new_addr)) 292 return -EINVAL; 293 294 if (new_addr[5] == 1 || /* 802.3x Pause address */ 295 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 296 new_addr[5] == 3) /* 802.1X PAE address */ 297 return -EINVAL; 298 299 if (!rtnl_trylock()) 300 return restart_syscall(); 301 302 spin_lock_bh(&br->lock); 303 ether_addr_copy(br->group_addr, new_addr); 304 spin_unlock_bh(&br->lock); 305 306 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true); 307 br_recalculate_fwd_mask(br); 308 netdev_state_change(br->dev); 309 310 rtnl_unlock(); 311 312 return len; 313 } 314 315 static DEVICE_ATTR_RW(group_addr); 316 317 static int set_flush(struct net_bridge *br, unsigned long val) 318 { 319 br_fdb_flush(br); 320 return 0; 321 } 322 323 static ssize_t flush_store(struct device *d, 324 struct device_attribute *attr, 325 const char *buf, size_t len) 326 { 327 return store_bridge_parm(d, buf, len, set_flush); 328 } 329 static DEVICE_ATTR_WO(flush); 330 331 static ssize_t no_linklocal_learn_show(struct device *d, 332 struct device_attribute *attr, 333 char *buf) 334 { 335 struct net_bridge *br = to_bridge(d); 336 return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN)); 337 } 338 339 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val) 340 { 341 return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, NULL); 342 } 343 344 static ssize_t no_linklocal_learn_store(struct device *d, 345 struct device_attribute *attr, 346 const char *buf, size_t len) 347 { 348 return store_bridge_parm(d, buf, len, set_no_linklocal_learn); 349 } 350 static DEVICE_ATTR_RW(no_linklocal_learn); 351 352 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 353 static ssize_t multicast_router_show(struct device *d, 354 struct device_attribute *attr, char *buf) 355 { 356 struct net_bridge *br = to_bridge(d); 357 return sprintf(buf, "%d\n", br->multicast_router); 358 } 359 360 static ssize_t multicast_router_store(struct device *d, 361 struct device_attribute *attr, 362 const char *buf, size_t len) 363 { 364 return store_bridge_parm(d, buf, len, br_multicast_set_router); 365 } 366 static DEVICE_ATTR_RW(multicast_router); 367 368 static ssize_t multicast_snooping_show(struct device *d, 369 struct device_attribute *attr, 370 char *buf) 371 { 372 struct net_bridge *br = to_bridge(d); 373 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED)); 374 } 375 376 static ssize_t multicast_snooping_store(struct device *d, 377 struct device_attribute *attr, 378 const char *buf, size_t len) 379 { 380 return store_bridge_parm(d, buf, len, br_multicast_toggle); 381 } 382 static DEVICE_ATTR_RW(multicast_snooping); 383 384 static ssize_t multicast_query_use_ifaddr_show(struct device *d, 385 struct device_attribute *attr, 386 char *buf) 387 { 388 struct net_bridge *br = to_bridge(d); 389 return sprintf(buf, "%d\n", 390 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)); 391 } 392 393 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val) 394 { 395 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val); 396 return 0; 397 } 398 399 static ssize_t 400 multicast_query_use_ifaddr_store(struct device *d, 401 struct device_attribute *attr, 402 const char *buf, size_t len) 403 { 404 return store_bridge_parm(d, buf, len, set_query_use_ifaddr); 405 } 406 static DEVICE_ATTR_RW(multicast_query_use_ifaddr); 407 408 static ssize_t multicast_querier_show(struct device *d, 409 struct device_attribute *attr, 410 char *buf) 411 { 412 struct net_bridge *br = to_bridge(d); 413 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_QUERIER)); 414 } 415 416 static ssize_t multicast_querier_store(struct device *d, 417 struct device_attribute *attr, 418 const char *buf, size_t len) 419 { 420 return store_bridge_parm(d, buf, len, br_multicast_set_querier); 421 } 422 static DEVICE_ATTR_RW(multicast_querier); 423 424 static ssize_t hash_elasticity_show(struct device *d, 425 struct device_attribute *attr, char *buf) 426 { 427 struct net_bridge *br = to_bridge(d); 428 return sprintf(buf, "%u\n", br->hash_elasticity); 429 } 430 431 static int set_elasticity(struct net_bridge *br, unsigned long val) 432 { 433 br->hash_elasticity = val; 434 return 0; 435 } 436 437 static ssize_t hash_elasticity_store(struct device *d, 438 struct device_attribute *attr, 439 const char *buf, size_t len) 440 { 441 return store_bridge_parm(d, buf, len, set_elasticity); 442 } 443 static DEVICE_ATTR_RW(hash_elasticity); 444 445 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr, 446 char *buf) 447 { 448 struct net_bridge *br = to_bridge(d); 449 return sprintf(buf, "%u\n", br->hash_max); 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, br_multicast_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