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->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 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 332 static ssize_t multicast_router_show(struct device *d, 333 struct device_attribute *attr, char *buf) 334 { 335 struct net_bridge *br = to_bridge(d); 336 return sprintf(buf, "%d\n", br->multicast_router); 337 } 338 339 static ssize_t multicast_router_store(struct device *d, 340 struct device_attribute *attr, 341 const char *buf, size_t len) 342 { 343 return store_bridge_parm(d, buf, len, br_multicast_set_router); 344 } 345 static DEVICE_ATTR_RW(multicast_router); 346 347 static ssize_t multicast_snooping_show(struct device *d, 348 struct device_attribute *attr, 349 char *buf) 350 { 351 struct net_bridge *br = to_bridge(d); 352 return sprintf(buf, "%d\n", !br->multicast_disabled); 353 } 354 355 static ssize_t multicast_snooping_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, br_multicast_toggle); 360 } 361 static DEVICE_ATTR_RW(multicast_snooping); 362 363 static ssize_t multicast_query_use_ifaddr_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->multicast_query_use_ifaddr); 369 } 370 371 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val) 372 { 373 br->multicast_query_use_ifaddr = !!val; 374 return 0; 375 } 376 377 static ssize_t 378 multicast_query_use_ifaddr_store(struct device *d, 379 struct device_attribute *attr, 380 const char *buf, size_t len) 381 { 382 return store_bridge_parm(d, buf, len, set_query_use_ifaddr); 383 } 384 static DEVICE_ATTR_RW(multicast_query_use_ifaddr); 385 386 static ssize_t multicast_querier_show(struct device *d, 387 struct device_attribute *attr, 388 char *buf) 389 { 390 struct net_bridge *br = to_bridge(d); 391 return sprintf(buf, "%d\n", br->multicast_querier); 392 } 393 394 static ssize_t multicast_querier_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, br_multicast_set_querier); 399 } 400 static DEVICE_ATTR_RW(multicast_querier); 401 402 static ssize_t hash_elasticity_show(struct device *d, 403 struct device_attribute *attr, char *buf) 404 { 405 struct net_bridge *br = to_bridge(d); 406 return sprintf(buf, "%u\n", br->hash_elasticity); 407 } 408 409 static int set_elasticity(struct net_bridge *br, unsigned long val) 410 { 411 br->hash_elasticity = val; 412 return 0; 413 } 414 415 static ssize_t hash_elasticity_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, set_elasticity); 420 } 421 static DEVICE_ATTR_RW(hash_elasticity); 422 423 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr, 424 char *buf) 425 { 426 struct net_bridge *br = to_bridge(d); 427 return sprintf(buf, "%u\n", br->hash_max); 428 } 429 430 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr, 431 const char *buf, size_t len) 432 { 433 return store_bridge_parm(d, buf, len, br_multicast_set_hash_max); 434 } 435 static DEVICE_ATTR_RW(hash_max); 436 437 static ssize_t multicast_igmp_version_show(struct device *d, 438 struct device_attribute *attr, 439 char *buf) 440 { 441 struct net_bridge *br = to_bridge(d); 442 443 return sprintf(buf, "%u\n", br->multicast_igmp_version); 444 } 445 446 static ssize_t multicast_igmp_version_store(struct device *d, 447 struct device_attribute *attr, 448 const char *buf, size_t len) 449 { 450 return store_bridge_parm(d, buf, len, br_multicast_set_igmp_version); 451 } 452 static DEVICE_ATTR_RW(multicast_igmp_version); 453 454 static ssize_t multicast_last_member_count_show(struct device *d, 455 struct device_attribute *attr, 456 char *buf) 457 { 458 struct net_bridge *br = to_bridge(d); 459 return sprintf(buf, "%u\n", br->multicast_last_member_count); 460 } 461 462 static int set_last_member_count(struct net_bridge *br, unsigned long val) 463 { 464 br->multicast_last_member_count = val; 465 return 0; 466 } 467 468 static ssize_t multicast_last_member_count_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, set_last_member_count); 473 } 474 static DEVICE_ATTR_RW(multicast_last_member_count); 475 476 static ssize_t multicast_startup_query_count_show( 477 struct device *d, struct device_attribute *attr, char *buf) 478 { 479 struct net_bridge *br = to_bridge(d); 480 return sprintf(buf, "%u\n", br->multicast_startup_query_count); 481 } 482 483 static int set_startup_query_count(struct net_bridge *br, unsigned long val) 484 { 485 br->multicast_startup_query_count = val; 486 return 0; 487 } 488 489 static ssize_t multicast_startup_query_count_store( 490 struct device *d, struct device_attribute *attr, const char *buf, 491 size_t len) 492 { 493 return store_bridge_parm(d, buf, len, set_startup_query_count); 494 } 495 static DEVICE_ATTR_RW(multicast_startup_query_count); 496 497 static ssize_t multicast_last_member_interval_show( 498 struct device *d, struct device_attribute *attr, char *buf) 499 { 500 struct net_bridge *br = to_bridge(d); 501 return sprintf(buf, "%lu\n", 502 jiffies_to_clock_t(br->multicast_last_member_interval)); 503 } 504 505 static int set_last_member_interval(struct net_bridge *br, unsigned long val) 506 { 507 br->multicast_last_member_interval = clock_t_to_jiffies(val); 508 return 0; 509 } 510 511 static ssize_t multicast_last_member_interval_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_last_member_interval); 516 } 517 static DEVICE_ATTR_RW(multicast_last_member_interval); 518 519 static ssize_t multicast_membership_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_membership_interval)); 525 } 526 527 static int set_membership_interval(struct net_bridge *br, unsigned long val) 528 { 529 br->multicast_membership_interval = clock_t_to_jiffies(val); 530 return 0; 531 } 532 533 static ssize_t multicast_membership_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_membership_interval); 538 } 539 static DEVICE_ATTR_RW(multicast_membership_interval); 540 541 static ssize_t multicast_querier_interval_show(struct device *d, 542 struct device_attribute *attr, 543 char *buf) 544 { 545 struct net_bridge *br = to_bridge(d); 546 return sprintf(buf, "%lu\n", 547 jiffies_to_clock_t(br->multicast_querier_interval)); 548 } 549 550 static int set_querier_interval(struct net_bridge *br, unsigned long val) 551 { 552 br->multicast_querier_interval = clock_t_to_jiffies(val); 553 return 0; 554 } 555 556 static ssize_t multicast_querier_interval_store(struct device *d, 557 struct device_attribute *attr, 558 const char *buf, size_t len) 559 { 560 return store_bridge_parm(d, buf, len, set_querier_interval); 561 } 562 static DEVICE_ATTR_RW(multicast_querier_interval); 563 564 static ssize_t multicast_query_interval_show(struct device *d, 565 struct device_attribute *attr, 566 char *buf) 567 { 568 struct net_bridge *br = to_bridge(d); 569 return sprintf(buf, "%lu\n", 570 jiffies_to_clock_t(br->multicast_query_interval)); 571 } 572 573 static int set_query_interval(struct net_bridge *br, unsigned long val) 574 { 575 br->multicast_query_interval = clock_t_to_jiffies(val); 576 return 0; 577 } 578 579 static ssize_t multicast_query_interval_store(struct device *d, 580 struct device_attribute *attr, 581 const char *buf, size_t len) 582 { 583 return store_bridge_parm(d, buf, len, set_query_interval); 584 } 585 static DEVICE_ATTR_RW(multicast_query_interval); 586 587 static ssize_t multicast_query_response_interval_show( 588 struct device *d, struct device_attribute *attr, char *buf) 589 { 590 struct net_bridge *br = to_bridge(d); 591 return sprintf( 592 buf, "%lu\n", 593 jiffies_to_clock_t(br->multicast_query_response_interval)); 594 } 595 596 static int set_query_response_interval(struct net_bridge *br, unsigned long val) 597 { 598 br->multicast_query_response_interval = clock_t_to_jiffies(val); 599 return 0; 600 } 601 602 static ssize_t multicast_query_response_interval_store( 603 struct device *d, struct device_attribute *attr, const char *buf, 604 size_t len) 605 { 606 return store_bridge_parm(d, buf, len, set_query_response_interval); 607 } 608 static DEVICE_ATTR_RW(multicast_query_response_interval); 609 610 static ssize_t multicast_startup_query_interval_show( 611 struct device *d, struct device_attribute *attr, char *buf) 612 { 613 struct net_bridge *br = to_bridge(d); 614 return sprintf( 615 buf, "%lu\n", 616 jiffies_to_clock_t(br->multicast_startup_query_interval)); 617 } 618 619 static int set_startup_query_interval(struct net_bridge *br, unsigned long val) 620 { 621 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 622 return 0; 623 } 624 625 static ssize_t multicast_startup_query_interval_store( 626 struct device *d, struct device_attribute *attr, const char *buf, 627 size_t len) 628 { 629 return store_bridge_parm(d, buf, len, set_startup_query_interval); 630 } 631 static DEVICE_ATTR_RW(multicast_startup_query_interval); 632 633 static ssize_t multicast_stats_enabled_show(struct device *d, 634 struct device_attribute *attr, 635 char *buf) 636 { 637 struct net_bridge *br = to_bridge(d); 638 639 return sprintf(buf, "%u\n", br->multicast_stats_enabled); 640 } 641 642 static int set_stats_enabled(struct net_bridge *br, unsigned long val) 643 { 644 br->multicast_stats_enabled = !!val; 645 return 0; 646 } 647 648 static ssize_t multicast_stats_enabled_store(struct device *d, 649 struct device_attribute *attr, 650 const char *buf, 651 size_t len) 652 { 653 return store_bridge_parm(d, buf, len, set_stats_enabled); 654 } 655 static DEVICE_ATTR_RW(multicast_stats_enabled); 656 657 #if IS_ENABLED(CONFIG_IPV6) 658 static ssize_t multicast_mld_version_show(struct device *d, 659 struct device_attribute *attr, 660 char *buf) 661 { 662 struct net_bridge *br = to_bridge(d); 663 664 return sprintf(buf, "%u\n", br->multicast_mld_version); 665 } 666 667 static ssize_t multicast_mld_version_store(struct device *d, 668 struct device_attribute *attr, 669 const char *buf, size_t len) 670 { 671 return store_bridge_parm(d, buf, len, br_multicast_set_mld_version); 672 } 673 static DEVICE_ATTR_RW(multicast_mld_version); 674 #endif 675 #endif 676 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 677 static ssize_t nf_call_iptables_show( 678 struct device *d, struct device_attribute *attr, char *buf) 679 { 680 struct net_bridge *br = to_bridge(d); 681 return sprintf(buf, "%u\n", br->nf_call_iptables); 682 } 683 684 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val) 685 { 686 br->nf_call_iptables = val ? true : false; 687 return 0; 688 } 689 690 static ssize_t nf_call_iptables_store( 691 struct device *d, struct device_attribute *attr, const char *buf, 692 size_t len) 693 { 694 return store_bridge_parm(d, buf, len, set_nf_call_iptables); 695 } 696 static DEVICE_ATTR_RW(nf_call_iptables); 697 698 static ssize_t nf_call_ip6tables_show( 699 struct device *d, struct device_attribute *attr, char *buf) 700 { 701 struct net_bridge *br = to_bridge(d); 702 return sprintf(buf, "%u\n", br->nf_call_ip6tables); 703 } 704 705 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val) 706 { 707 br->nf_call_ip6tables = val ? true : false; 708 return 0; 709 } 710 711 static ssize_t nf_call_ip6tables_store( 712 struct device *d, struct device_attribute *attr, const char *buf, 713 size_t len) 714 { 715 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables); 716 } 717 static DEVICE_ATTR_RW(nf_call_ip6tables); 718 719 static ssize_t nf_call_arptables_show( 720 struct device *d, struct device_attribute *attr, char *buf) 721 { 722 struct net_bridge *br = to_bridge(d); 723 return sprintf(buf, "%u\n", br->nf_call_arptables); 724 } 725 726 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val) 727 { 728 br->nf_call_arptables = val ? true : false; 729 return 0; 730 } 731 732 static ssize_t nf_call_arptables_store( 733 struct device *d, struct device_attribute *attr, const char *buf, 734 size_t len) 735 { 736 return store_bridge_parm(d, buf, len, set_nf_call_arptables); 737 } 738 static DEVICE_ATTR_RW(nf_call_arptables); 739 #endif 740 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 741 static ssize_t vlan_filtering_show(struct device *d, 742 struct device_attribute *attr, 743 char *buf) 744 { 745 struct net_bridge *br = to_bridge(d); 746 return sprintf(buf, "%d\n", br->vlan_enabled); 747 } 748 749 static ssize_t vlan_filtering_store(struct device *d, 750 struct device_attribute *attr, 751 const char *buf, size_t len) 752 { 753 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle); 754 } 755 static DEVICE_ATTR_RW(vlan_filtering); 756 757 static ssize_t vlan_protocol_show(struct device *d, 758 struct device_attribute *attr, 759 char *buf) 760 { 761 struct net_bridge *br = to_bridge(d); 762 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto)); 763 } 764 765 static ssize_t vlan_protocol_store(struct device *d, 766 struct device_attribute *attr, 767 const char *buf, size_t len) 768 { 769 return store_bridge_parm(d, buf, len, br_vlan_set_proto); 770 } 771 static DEVICE_ATTR_RW(vlan_protocol); 772 773 static ssize_t default_pvid_show(struct device *d, 774 struct device_attribute *attr, 775 char *buf) 776 { 777 struct net_bridge *br = to_bridge(d); 778 return sprintf(buf, "%d\n", br->default_pvid); 779 } 780 781 static ssize_t default_pvid_store(struct device *d, 782 struct device_attribute *attr, 783 const char *buf, size_t len) 784 { 785 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid); 786 } 787 static DEVICE_ATTR_RW(default_pvid); 788 789 static ssize_t vlan_stats_enabled_show(struct device *d, 790 struct device_attribute *attr, 791 char *buf) 792 { 793 struct net_bridge *br = to_bridge(d); 794 return sprintf(buf, "%u\n", br->vlan_stats_enabled); 795 } 796 797 static ssize_t vlan_stats_enabled_store(struct device *d, 798 struct device_attribute *attr, 799 const char *buf, size_t len) 800 { 801 return store_bridge_parm(d, buf, len, br_vlan_set_stats); 802 } 803 static DEVICE_ATTR_RW(vlan_stats_enabled); 804 #endif 805 806 static struct attribute *bridge_attrs[] = { 807 &dev_attr_forward_delay.attr, 808 &dev_attr_hello_time.attr, 809 &dev_attr_max_age.attr, 810 &dev_attr_ageing_time.attr, 811 &dev_attr_stp_state.attr, 812 &dev_attr_group_fwd_mask.attr, 813 &dev_attr_priority.attr, 814 &dev_attr_bridge_id.attr, 815 &dev_attr_root_id.attr, 816 &dev_attr_root_path_cost.attr, 817 &dev_attr_root_port.attr, 818 &dev_attr_topology_change.attr, 819 &dev_attr_topology_change_detected.attr, 820 &dev_attr_hello_timer.attr, 821 &dev_attr_tcn_timer.attr, 822 &dev_attr_topology_change_timer.attr, 823 &dev_attr_gc_timer.attr, 824 &dev_attr_group_addr.attr, 825 &dev_attr_flush.attr, 826 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 827 &dev_attr_multicast_router.attr, 828 &dev_attr_multicast_snooping.attr, 829 &dev_attr_multicast_querier.attr, 830 &dev_attr_multicast_query_use_ifaddr.attr, 831 &dev_attr_hash_elasticity.attr, 832 &dev_attr_hash_max.attr, 833 &dev_attr_multicast_last_member_count.attr, 834 &dev_attr_multicast_startup_query_count.attr, 835 &dev_attr_multicast_last_member_interval.attr, 836 &dev_attr_multicast_membership_interval.attr, 837 &dev_attr_multicast_querier_interval.attr, 838 &dev_attr_multicast_query_interval.attr, 839 &dev_attr_multicast_query_response_interval.attr, 840 &dev_attr_multicast_startup_query_interval.attr, 841 &dev_attr_multicast_stats_enabled.attr, 842 &dev_attr_multicast_igmp_version.attr, 843 #if IS_ENABLED(CONFIG_IPV6) 844 &dev_attr_multicast_mld_version.attr, 845 #endif 846 #endif 847 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 848 &dev_attr_nf_call_iptables.attr, 849 &dev_attr_nf_call_ip6tables.attr, 850 &dev_attr_nf_call_arptables.attr, 851 #endif 852 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 853 &dev_attr_vlan_filtering.attr, 854 &dev_attr_vlan_protocol.attr, 855 &dev_attr_default_pvid.attr, 856 &dev_attr_vlan_stats_enabled.attr, 857 #endif 858 NULL 859 }; 860 861 static const struct attribute_group bridge_group = { 862 .name = SYSFS_BRIDGE_ATTR, 863 .attrs = bridge_attrs, 864 }; 865 866 /* 867 * Export the forwarding information table as a binary file 868 * The records are struct __fdb_entry. 869 * 870 * Returns the number of bytes read. 871 */ 872 static ssize_t brforward_read(struct file *filp, struct kobject *kobj, 873 struct bin_attribute *bin_attr, 874 char *buf, loff_t off, size_t count) 875 { 876 struct device *dev = kobj_to_dev(kobj); 877 struct net_bridge *br = to_bridge(dev); 878 int n; 879 880 /* must read whole records */ 881 if (off % sizeof(struct __fdb_entry) != 0) 882 return -EINVAL; 883 884 n = br_fdb_fillbuf(br, buf, 885 count / sizeof(struct __fdb_entry), 886 off / sizeof(struct __fdb_entry)); 887 888 if (n > 0) 889 n *= sizeof(struct __fdb_entry); 890 891 return n; 892 } 893 894 static struct bin_attribute bridge_forward = { 895 .attr = { .name = SYSFS_BRIDGE_FDB, 896 .mode = 0444, }, 897 .read = brforward_read, 898 }; 899 900 /* 901 * Add entries in sysfs onto the existing network class device 902 * for the bridge. 903 * Adds a attribute group "bridge" containing tuning parameters. 904 * Binary attribute containing the forward table 905 * Sub directory to hold links to interfaces. 906 * 907 * Note: the ifobj exists only to be a subdirectory 908 * to hold links. The ifobj exists in same data structure 909 * as it's parent the bridge so reference counting works. 910 */ 911 int br_sysfs_addbr(struct net_device *dev) 912 { 913 struct kobject *brobj = &dev->dev.kobj; 914 struct net_bridge *br = netdev_priv(dev); 915 int err; 916 917 err = sysfs_create_group(brobj, &bridge_group); 918 if (err) { 919 pr_info("%s: can't create group %s/%s\n", 920 __func__, dev->name, bridge_group.name); 921 goto out1; 922 } 923 924 err = sysfs_create_bin_file(brobj, &bridge_forward); 925 if (err) { 926 pr_info("%s: can't create attribute file %s/%s\n", 927 __func__, dev->name, bridge_forward.attr.name); 928 goto out2; 929 } 930 931 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj); 932 if (!br->ifobj) { 933 pr_info("%s: can't add kobject (directory) %s/%s\n", 934 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR); 935 err = -ENOMEM; 936 goto out3; 937 } 938 return 0; 939 out3: 940 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward); 941 out2: 942 sysfs_remove_group(&dev->dev.kobj, &bridge_group); 943 out1: 944 return err; 945 946 } 947 948 void br_sysfs_delbr(struct net_device *dev) 949 { 950 struct kobject *kobj = &dev->dev.kobj; 951 struct net_bridge *br = netdev_priv(dev); 952 953 kobject_put(br->ifobj); 954 sysfs_remove_bin_file(kobj, &bridge_forward); 955 sysfs_remove_group(kobj, &bridge_group); 956 } 957