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 23 #include "br_private.h" 24 25 #define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd))) 26 27 /* 28 * Common code for storing bridge parameters. 29 */ 30 static ssize_t store_bridge_parm(struct device *d, 31 const char *buf, size_t len, 32 int (*set)(struct net_bridge *, unsigned long)) 33 { 34 struct net_bridge *br = to_bridge(d); 35 char *endp; 36 unsigned long val; 37 int err; 38 39 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN)) 40 return -EPERM; 41 42 val = simple_strtoul(buf, &endp, 0); 43 if (endp == buf) 44 return -EINVAL; 45 46 if (!rtnl_trylock()) 47 return restart_syscall(); 48 49 err = (*set)(br, val); 50 if (!err) 51 netdev_state_change(br->dev); 52 rtnl_unlock(); 53 54 return err ? err : len; 55 } 56 57 58 static ssize_t forward_delay_show(struct device *d, 59 struct device_attribute *attr, char *buf) 60 { 61 struct net_bridge *br = to_bridge(d); 62 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay)); 63 } 64 65 static ssize_t forward_delay_store(struct device *d, 66 struct device_attribute *attr, 67 const char *buf, size_t len) 68 { 69 return store_bridge_parm(d, buf, len, br_set_forward_delay); 70 } 71 static DEVICE_ATTR_RW(forward_delay); 72 73 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr, 74 char *buf) 75 { 76 return sprintf(buf, "%lu\n", 77 jiffies_to_clock_t(to_bridge(d)->hello_time)); 78 } 79 80 static ssize_t hello_time_store(struct device *d, 81 struct device_attribute *attr, const char *buf, 82 size_t len) 83 { 84 return store_bridge_parm(d, buf, len, br_set_hello_time); 85 } 86 static DEVICE_ATTR_RW(hello_time); 87 88 static ssize_t max_age_show(struct device *d, struct device_attribute *attr, 89 char *buf) 90 { 91 return sprintf(buf, "%lu\n", 92 jiffies_to_clock_t(to_bridge(d)->max_age)); 93 } 94 95 static ssize_t max_age_store(struct device *d, struct device_attribute *attr, 96 const char *buf, size_t len) 97 { 98 return store_bridge_parm(d, buf, len, br_set_max_age); 99 } 100 static DEVICE_ATTR_RW(max_age); 101 102 static ssize_t ageing_time_show(struct device *d, 103 struct device_attribute *attr, char *buf) 104 { 105 struct net_bridge *br = to_bridge(d); 106 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time)); 107 } 108 109 static int set_ageing_time(struct net_bridge *br, unsigned long val) 110 { 111 return br_set_ageing_time(br, val); 112 } 113 114 static ssize_t ageing_time_store(struct device *d, 115 struct device_attribute *attr, 116 const char *buf, size_t len) 117 { 118 return store_bridge_parm(d, buf, len, set_ageing_time); 119 } 120 static DEVICE_ATTR_RW(ageing_time); 121 122 static ssize_t stp_state_show(struct device *d, 123 struct device_attribute *attr, char *buf) 124 { 125 struct net_bridge *br = to_bridge(d); 126 return sprintf(buf, "%d\n", br->stp_enabled); 127 } 128 129 130 static int set_stp_state(struct net_bridge *br, unsigned long val) 131 { 132 br_stp_set_enabled(br, val); 133 134 return 0; 135 } 136 137 static ssize_t stp_state_store(struct device *d, 138 struct device_attribute *attr, const char *buf, 139 size_t len) 140 { 141 return store_bridge_parm(d, buf, len, set_stp_state); 142 } 143 static DEVICE_ATTR_RW(stp_state); 144 145 static ssize_t group_fwd_mask_show(struct device *d, 146 struct device_attribute *attr, 147 char *buf) 148 { 149 struct net_bridge *br = to_bridge(d); 150 return sprintf(buf, "%#x\n", br->group_fwd_mask); 151 } 152 153 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val) 154 { 155 if (val & BR_GROUPFWD_RESTRICTED) 156 return -EINVAL; 157 158 br->group_fwd_mask = val; 159 160 return 0; 161 } 162 163 static ssize_t group_fwd_mask_store(struct device *d, 164 struct device_attribute *attr, 165 const char *buf, 166 size_t len) 167 { 168 return store_bridge_parm(d, buf, len, set_group_fwd_mask); 169 } 170 static DEVICE_ATTR_RW(group_fwd_mask); 171 172 static ssize_t priority_show(struct device *d, struct device_attribute *attr, 173 char *buf) 174 { 175 struct net_bridge *br = to_bridge(d); 176 return sprintf(buf, "%d\n", 177 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]); 178 } 179 180 static int set_priority(struct net_bridge *br, unsigned long val) 181 { 182 br_stp_set_bridge_priority(br, (u16) val); 183 return 0; 184 } 185 186 static ssize_t priority_store(struct device *d, struct device_attribute *attr, 187 const char *buf, size_t len) 188 { 189 return store_bridge_parm(d, buf, len, set_priority); 190 } 191 static DEVICE_ATTR_RW(priority); 192 193 static ssize_t root_id_show(struct device *d, struct device_attribute *attr, 194 char *buf) 195 { 196 return br_show_bridge_id(buf, &to_bridge(d)->designated_root); 197 } 198 static DEVICE_ATTR_RO(root_id); 199 200 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr, 201 char *buf) 202 { 203 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id); 204 } 205 static DEVICE_ATTR_RO(bridge_id); 206 207 static ssize_t root_port_show(struct device *d, struct device_attribute *attr, 208 char *buf) 209 { 210 return sprintf(buf, "%d\n", to_bridge(d)->root_port); 211 } 212 static DEVICE_ATTR_RO(root_port); 213 214 static ssize_t root_path_cost_show(struct device *d, 215 struct device_attribute *attr, char *buf) 216 { 217 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost); 218 } 219 static DEVICE_ATTR_RO(root_path_cost); 220 221 static ssize_t topology_change_show(struct device *d, 222 struct device_attribute *attr, char *buf) 223 { 224 return sprintf(buf, "%d\n", to_bridge(d)->topology_change); 225 } 226 static DEVICE_ATTR_RO(topology_change); 227 228 static ssize_t topology_change_detected_show(struct device *d, 229 struct device_attribute *attr, 230 char *buf) 231 { 232 struct net_bridge *br = to_bridge(d); 233 return sprintf(buf, "%d\n", br->topology_change_detected); 234 } 235 static DEVICE_ATTR_RO(topology_change_detected); 236 237 static ssize_t hello_timer_show(struct device *d, 238 struct device_attribute *attr, char *buf) 239 { 240 struct net_bridge *br = to_bridge(d); 241 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer)); 242 } 243 static DEVICE_ATTR_RO(hello_timer); 244 245 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr, 246 char *buf) 247 { 248 struct net_bridge *br = to_bridge(d); 249 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer)); 250 } 251 static DEVICE_ATTR_RO(tcn_timer); 252 253 static ssize_t topology_change_timer_show(struct device *d, 254 struct device_attribute *attr, 255 char *buf) 256 { 257 struct net_bridge *br = to_bridge(d); 258 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer)); 259 } 260 static DEVICE_ATTR_RO(topology_change_timer); 261 262 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr, 263 char *buf) 264 { 265 struct net_bridge *br = to_bridge(d); 266 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer)); 267 } 268 static DEVICE_ATTR_RO(gc_timer); 269 270 static ssize_t group_addr_show(struct device *d, 271 struct device_attribute *attr, char *buf) 272 { 273 struct net_bridge *br = to_bridge(d); 274 return sprintf(buf, "%x:%x:%x:%x:%x:%x\n", 275 br->group_addr[0], br->group_addr[1], 276 br->group_addr[2], br->group_addr[3], 277 br->group_addr[4], br->group_addr[5]); 278 } 279 280 static ssize_t group_addr_store(struct device *d, 281 struct device_attribute *attr, 282 const char *buf, size_t len) 283 { 284 struct net_bridge *br = to_bridge(d); 285 u8 new_addr[6]; 286 int i; 287 288 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN)) 289 return -EPERM; 290 291 if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", 292 &new_addr[0], &new_addr[1], &new_addr[2], 293 &new_addr[3], &new_addr[4], &new_addr[5]) != 6) 294 return -EINVAL; 295 296 if (!is_link_local_ether_addr(new_addr)) 297 return -EINVAL; 298 299 if (new_addr[5] == 1 || /* 802.3x Pause address */ 300 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 301 new_addr[5] == 3) /* 802.1X PAE address */ 302 return -EINVAL; 303 304 if (!rtnl_trylock()) 305 return restart_syscall(); 306 307 spin_lock_bh(&br->lock); 308 for (i = 0; i < 6; i++) 309 br->group_addr[i] = new_addr[i]; 310 spin_unlock_bh(&br->lock); 311 312 br->group_addr_set = true; 313 br_recalculate_fwd_mask(br); 314 netdev_state_change(br->dev); 315 316 rtnl_unlock(); 317 318 return len; 319 } 320 321 static DEVICE_ATTR_RW(group_addr); 322 323 static int set_flush(struct net_bridge *br, unsigned long val) 324 { 325 br_fdb_flush(br); 326 return 0; 327 } 328 329 static ssize_t flush_store(struct device *d, 330 struct device_attribute *attr, 331 const char *buf, size_t len) 332 { 333 return store_bridge_parm(d, buf, len, set_flush); 334 } 335 static DEVICE_ATTR_WO(flush); 336 337 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 338 static ssize_t multicast_router_show(struct device *d, 339 struct device_attribute *attr, char *buf) 340 { 341 struct net_bridge *br = to_bridge(d); 342 return sprintf(buf, "%d\n", br->multicast_router); 343 } 344 345 static ssize_t multicast_router_store(struct device *d, 346 struct device_attribute *attr, 347 const char *buf, size_t len) 348 { 349 return store_bridge_parm(d, buf, len, br_multicast_set_router); 350 } 351 static DEVICE_ATTR_RW(multicast_router); 352 353 static ssize_t multicast_snooping_show(struct device *d, 354 struct device_attribute *attr, 355 char *buf) 356 { 357 struct net_bridge *br = to_bridge(d); 358 return sprintf(buf, "%d\n", !br->multicast_disabled); 359 } 360 361 static ssize_t multicast_snooping_store(struct device *d, 362 struct device_attribute *attr, 363 const char *buf, size_t len) 364 { 365 return store_bridge_parm(d, buf, len, br_multicast_toggle); 366 } 367 static DEVICE_ATTR_RW(multicast_snooping); 368 369 static ssize_t multicast_query_use_ifaddr_show(struct device *d, 370 struct device_attribute *attr, 371 char *buf) 372 { 373 struct net_bridge *br = to_bridge(d); 374 return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr); 375 } 376 377 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val) 378 { 379 br->multicast_query_use_ifaddr = !!val; 380 return 0; 381 } 382 383 static ssize_t 384 multicast_query_use_ifaddr_store(struct device *d, 385 struct device_attribute *attr, 386 const char *buf, size_t len) 387 { 388 return store_bridge_parm(d, buf, len, set_query_use_ifaddr); 389 } 390 static DEVICE_ATTR_RW(multicast_query_use_ifaddr); 391 392 static ssize_t multicast_querier_show(struct device *d, 393 struct device_attribute *attr, 394 char *buf) 395 { 396 struct net_bridge *br = to_bridge(d); 397 return sprintf(buf, "%d\n", br->multicast_querier); 398 } 399 400 static ssize_t multicast_querier_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, br_multicast_set_querier); 405 } 406 static DEVICE_ATTR_RW(multicast_querier); 407 408 static ssize_t hash_elasticity_show(struct device *d, 409 struct device_attribute *attr, char *buf) 410 { 411 struct net_bridge *br = to_bridge(d); 412 return sprintf(buf, "%u\n", br->hash_elasticity); 413 } 414 415 static int set_elasticity(struct net_bridge *br, unsigned long val) 416 { 417 br->hash_elasticity = val; 418 return 0; 419 } 420 421 static ssize_t hash_elasticity_store(struct device *d, 422 struct device_attribute *attr, 423 const char *buf, size_t len) 424 { 425 return store_bridge_parm(d, buf, len, set_elasticity); 426 } 427 static DEVICE_ATTR_RW(hash_elasticity); 428 429 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr, 430 char *buf) 431 { 432 struct net_bridge *br = to_bridge(d); 433 return sprintf(buf, "%u\n", br->hash_max); 434 } 435 436 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr, 437 const char *buf, size_t len) 438 { 439 return store_bridge_parm(d, buf, len, br_multicast_set_hash_max); 440 } 441 static DEVICE_ATTR_RW(hash_max); 442 443 static ssize_t multicast_igmp_version_show(struct device *d, 444 struct device_attribute *attr, 445 char *buf) 446 { 447 struct net_bridge *br = to_bridge(d); 448 449 return sprintf(buf, "%u\n", br->multicast_igmp_version); 450 } 451 452 static ssize_t multicast_igmp_version_store(struct device *d, 453 struct device_attribute *attr, 454 const char *buf, size_t len) 455 { 456 return store_bridge_parm(d, buf, len, br_multicast_set_igmp_version); 457 } 458 static DEVICE_ATTR_RW(multicast_igmp_version); 459 460 static ssize_t multicast_last_member_count_show(struct device *d, 461 struct device_attribute *attr, 462 char *buf) 463 { 464 struct net_bridge *br = to_bridge(d); 465 return sprintf(buf, "%u\n", br->multicast_last_member_count); 466 } 467 468 static int set_last_member_count(struct net_bridge *br, unsigned long val) 469 { 470 br->multicast_last_member_count = val; 471 return 0; 472 } 473 474 static ssize_t multicast_last_member_count_store(struct device *d, 475 struct device_attribute *attr, 476 const char *buf, size_t len) 477 { 478 return store_bridge_parm(d, buf, len, set_last_member_count); 479 } 480 static DEVICE_ATTR_RW(multicast_last_member_count); 481 482 static ssize_t multicast_startup_query_count_show( 483 struct device *d, struct device_attribute *attr, char *buf) 484 { 485 struct net_bridge *br = to_bridge(d); 486 return sprintf(buf, "%u\n", br->multicast_startup_query_count); 487 } 488 489 static int set_startup_query_count(struct net_bridge *br, unsigned long val) 490 { 491 br->multicast_startup_query_count = val; 492 return 0; 493 } 494 495 static ssize_t multicast_startup_query_count_store( 496 struct device *d, struct device_attribute *attr, const char *buf, 497 size_t len) 498 { 499 return store_bridge_parm(d, buf, len, set_startup_query_count); 500 } 501 static DEVICE_ATTR_RW(multicast_startup_query_count); 502 503 static ssize_t multicast_last_member_interval_show( 504 struct device *d, struct device_attribute *attr, char *buf) 505 { 506 struct net_bridge *br = to_bridge(d); 507 return sprintf(buf, "%lu\n", 508 jiffies_to_clock_t(br->multicast_last_member_interval)); 509 } 510 511 static int set_last_member_interval(struct net_bridge *br, unsigned long val) 512 { 513 br->multicast_last_member_interval = clock_t_to_jiffies(val); 514 return 0; 515 } 516 517 static ssize_t multicast_last_member_interval_store( 518 struct device *d, struct device_attribute *attr, const char *buf, 519 size_t len) 520 { 521 return store_bridge_parm(d, buf, len, set_last_member_interval); 522 } 523 static DEVICE_ATTR_RW(multicast_last_member_interval); 524 525 static ssize_t multicast_membership_interval_show( 526 struct device *d, struct device_attribute *attr, char *buf) 527 { 528 struct net_bridge *br = to_bridge(d); 529 return sprintf(buf, "%lu\n", 530 jiffies_to_clock_t(br->multicast_membership_interval)); 531 } 532 533 static int set_membership_interval(struct net_bridge *br, unsigned long val) 534 { 535 br->multicast_membership_interval = clock_t_to_jiffies(val); 536 return 0; 537 } 538 539 static ssize_t multicast_membership_interval_store( 540 struct device *d, struct device_attribute *attr, const char *buf, 541 size_t len) 542 { 543 return store_bridge_parm(d, buf, len, set_membership_interval); 544 } 545 static DEVICE_ATTR_RW(multicast_membership_interval); 546 547 static ssize_t multicast_querier_interval_show(struct device *d, 548 struct device_attribute *attr, 549 char *buf) 550 { 551 struct net_bridge *br = to_bridge(d); 552 return sprintf(buf, "%lu\n", 553 jiffies_to_clock_t(br->multicast_querier_interval)); 554 } 555 556 static int set_querier_interval(struct net_bridge *br, unsigned long val) 557 { 558 br->multicast_querier_interval = clock_t_to_jiffies(val); 559 return 0; 560 } 561 562 static ssize_t multicast_querier_interval_store(struct device *d, 563 struct device_attribute *attr, 564 const char *buf, size_t len) 565 { 566 return store_bridge_parm(d, buf, len, set_querier_interval); 567 } 568 static DEVICE_ATTR_RW(multicast_querier_interval); 569 570 static ssize_t multicast_query_interval_show(struct device *d, 571 struct device_attribute *attr, 572 char *buf) 573 { 574 struct net_bridge *br = to_bridge(d); 575 return sprintf(buf, "%lu\n", 576 jiffies_to_clock_t(br->multicast_query_interval)); 577 } 578 579 static int set_query_interval(struct net_bridge *br, unsigned long val) 580 { 581 br->multicast_query_interval = clock_t_to_jiffies(val); 582 return 0; 583 } 584 585 static ssize_t multicast_query_interval_store(struct device *d, 586 struct device_attribute *attr, 587 const char *buf, size_t len) 588 { 589 return store_bridge_parm(d, buf, len, set_query_interval); 590 } 591 static DEVICE_ATTR_RW(multicast_query_interval); 592 593 static ssize_t multicast_query_response_interval_show( 594 struct device *d, struct device_attribute *attr, char *buf) 595 { 596 struct net_bridge *br = to_bridge(d); 597 return sprintf( 598 buf, "%lu\n", 599 jiffies_to_clock_t(br->multicast_query_response_interval)); 600 } 601 602 static int set_query_response_interval(struct net_bridge *br, unsigned long val) 603 { 604 br->multicast_query_response_interval = clock_t_to_jiffies(val); 605 return 0; 606 } 607 608 static ssize_t multicast_query_response_interval_store( 609 struct device *d, struct device_attribute *attr, const char *buf, 610 size_t len) 611 { 612 return store_bridge_parm(d, buf, len, set_query_response_interval); 613 } 614 static DEVICE_ATTR_RW(multicast_query_response_interval); 615 616 static ssize_t multicast_startup_query_interval_show( 617 struct device *d, struct device_attribute *attr, char *buf) 618 { 619 struct net_bridge *br = to_bridge(d); 620 return sprintf( 621 buf, "%lu\n", 622 jiffies_to_clock_t(br->multicast_startup_query_interval)); 623 } 624 625 static int set_startup_query_interval(struct net_bridge *br, unsigned long val) 626 { 627 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 628 return 0; 629 } 630 631 static ssize_t multicast_startup_query_interval_store( 632 struct device *d, struct device_attribute *attr, const char *buf, 633 size_t len) 634 { 635 return store_bridge_parm(d, buf, len, set_startup_query_interval); 636 } 637 static DEVICE_ATTR_RW(multicast_startup_query_interval); 638 639 static ssize_t multicast_stats_enabled_show(struct device *d, 640 struct device_attribute *attr, 641 char *buf) 642 { 643 struct net_bridge *br = to_bridge(d); 644 645 return sprintf(buf, "%u\n", br->multicast_stats_enabled); 646 } 647 648 static int set_stats_enabled(struct net_bridge *br, unsigned long val) 649 { 650 br->multicast_stats_enabled = !!val; 651 return 0; 652 } 653 654 static ssize_t multicast_stats_enabled_store(struct device *d, 655 struct device_attribute *attr, 656 const char *buf, 657 size_t len) 658 { 659 return store_bridge_parm(d, buf, len, set_stats_enabled); 660 } 661 static DEVICE_ATTR_RW(multicast_stats_enabled); 662 663 #if IS_ENABLED(CONFIG_IPV6) 664 static ssize_t multicast_mld_version_show(struct device *d, 665 struct device_attribute *attr, 666 char *buf) 667 { 668 struct net_bridge *br = to_bridge(d); 669 670 return sprintf(buf, "%u\n", br->multicast_mld_version); 671 } 672 673 static ssize_t multicast_mld_version_store(struct device *d, 674 struct device_attribute *attr, 675 const char *buf, size_t len) 676 { 677 return store_bridge_parm(d, buf, len, br_multicast_set_mld_version); 678 } 679 static DEVICE_ATTR_RW(multicast_mld_version); 680 #endif 681 #endif 682 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 683 static ssize_t nf_call_iptables_show( 684 struct device *d, struct device_attribute *attr, char *buf) 685 { 686 struct net_bridge *br = to_bridge(d); 687 return sprintf(buf, "%u\n", br->nf_call_iptables); 688 } 689 690 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val) 691 { 692 br->nf_call_iptables = val ? true : false; 693 return 0; 694 } 695 696 static ssize_t nf_call_iptables_store( 697 struct device *d, struct device_attribute *attr, const char *buf, 698 size_t len) 699 { 700 return store_bridge_parm(d, buf, len, set_nf_call_iptables); 701 } 702 static DEVICE_ATTR_RW(nf_call_iptables); 703 704 static ssize_t nf_call_ip6tables_show( 705 struct device *d, struct device_attribute *attr, char *buf) 706 { 707 struct net_bridge *br = to_bridge(d); 708 return sprintf(buf, "%u\n", br->nf_call_ip6tables); 709 } 710 711 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val) 712 { 713 br->nf_call_ip6tables = val ? true : false; 714 return 0; 715 } 716 717 static ssize_t nf_call_ip6tables_store( 718 struct device *d, struct device_attribute *attr, const char *buf, 719 size_t len) 720 { 721 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables); 722 } 723 static DEVICE_ATTR_RW(nf_call_ip6tables); 724 725 static ssize_t nf_call_arptables_show( 726 struct device *d, struct device_attribute *attr, char *buf) 727 { 728 struct net_bridge *br = to_bridge(d); 729 return sprintf(buf, "%u\n", br->nf_call_arptables); 730 } 731 732 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val) 733 { 734 br->nf_call_arptables = val ? true : false; 735 return 0; 736 } 737 738 static ssize_t nf_call_arptables_store( 739 struct device *d, struct device_attribute *attr, const char *buf, 740 size_t len) 741 { 742 return store_bridge_parm(d, buf, len, set_nf_call_arptables); 743 } 744 static DEVICE_ATTR_RW(nf_call_arptables); 745 #endif 746 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 747 static ssize_t vlan_filtering_show(struct device *d, 748 struct device_attribute *attr, 749 char *buf) 750 { 751 struct net_bridge *br = to_bridge(d); 752 return sprintf(buf, "%d\n", br->vlan_enabled); 753 } 754 755 static ssize_t vlan_filtering_store(struct device *d, 756 struct device_attribute *attr, 757 const char *buf, size_t len) 758 { 759 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle); 760 } 761 static DEVICE_ATTR_RW(vlan_filtering); 762 763 static ssize_t vlan_protocol_show(struct device *d, 764 struct device_attribute *attr, 765 char *buf) 766 { 767 struct net_bridge *br = to_bridge(d); 768 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto)); 769 } 770 771 static ssize_t vlan_protocol_store(struct device *d, 772 struct device_attribute *attr, 773 const char *buf, size_t len) 774 { 775 return store_bridge_parm(d, buf, len, br_vlan_set_proto); 776 } 777 static DEVICE_ATTR_RW(vlan_protocol); 778 779 static ssize_t default_pvid_show(struct device *d, 780 struct device_attribute *attr, 781 char *buf) 782 { 783 struct net_bridge *br = to_bridge(d); 784 return sprintf(buf, "%d\n", br->default_pvid); 785 } 786 787 static ssize_t default_pvid_store(struct device *d, 788 struct device_attribute *attr, 789 const char *buf, size_t len) 790 { 791 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid); 792 } 793 static DEVICE_ATTR_RW(default_pvid); 794 795 static ssize_t vlan_stats_enabled_show(struct device *d, 796 struct device_attribute *attr, 797 char *buf) 798 { 799 struct net_bridge *br = to_bridge(d); 800 return sprintf(buf, "%u\n", br->vlan_stats_enabled); 801 } 802 803 static ssize_t vlan_stats_enabled_store(struct device *d, 804 struct device_attribute *attr, 805 const char *buf, size_t len) 806 { 807 return store_bridge_parm(d, buf, len, br_vlan_set_stats); 808 } 809 static DEVICE_ATTR_RW(vlan_stats_enabled); 810 #endif 811 812 static struct attribute *bridge_attrs[] = { 813 &dev_attr_forward_delay.attr, 814 &dev_attr_hello_time.attr, 815 &dev_attr_max_age.attr, 816 &dev_attr_ageing_time.attr, 817 &dev_attr_stp_state.attr, 818 &dev_attr_group_fwd_mask.attr, 819 &dev_attr_priority.attr, 820 &dev_attr_bridge_id.attr, 821 &dev_attr_root_id.attr, 822 &dev_attr_root_path_cost.attr, 823 &dev_attr_root_port.attr, 824 &dev_attr_topology_change.attr, 825 &dev_attr_topology_change_detected.attr, 826 &dev_attr_hello_timer.attr, 827 &dev_attr_tcn_timer.attr, 828 &dev_attr_topology_change_timer.attr, 829 &dev_attr_gc_timer.attr, 830 &dev_attr_group_addr.attr, 831 &dev_attr_flush.attr, 832 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 833 &dev_attr_multicast_router.attr, 834 &dev_attr_multicast_snooping.attr, 835 &dev_attr_multicast_querier.attr, 836 &dev_attr_multicast_query_use_ifaddr.attr, 837 &dev_attr_hash_elasticity.attr, 838 &dev_attr_hash_max.attr, 839 &dev_attr_multicast_last_member_count.attr, 840 &dev_attr_multicast_startup_query_count.attr, 841 &dev_attr_multicast_last_member_interval.attr, 842 &dev_attr_multicast_membership_interval.attr, 843 &dev_attr_multicast_querier_interval.attr, 844 &dev_attr_multicast_query_interval.attr, 845 &dev_attr_multicast_query_response_interval.attr, 846 &dev_attr_multicast_startup_query_interval.attr, 847 &dev_attr_multicast_stats_enabled.attr, 848 &dev_attr_multicast_igmp_version.attr, 849 #if IS_ENABLED(CONFIG_IPV6) 850 &dev_attr_multicast_mld_version.attr, 851 #endif 852 #endif 853 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 854 &dev_attr_nf_call_iptables.attr, 855 &dev_attr_nf_call_ip6tables.attr, 856 &dev_attr_nf_call_arptables.attr, 857 #endif 858 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 859 &dev_attr_vlan_filtering.attr, 860 &dev_attr_vlan_protocol.attr, 861 &dev_attr_default_pvid.attr, 862 &dev_attr_vlan_stats_enabled.attr, 863 #endif 864 NULL 865 }; 866 867 static struct attribute_group bridge_group = { 868 .name = SYSFS_BRIDGE_ATTR, 869 .attrs = bridge_attrs, 870 }; 871 872 /* 873 * Export the forwarding information table as a binary file 874 * The records are struct __fdb_entry. 875 * 876 * Returns the number of bytes read. 877 */ 878 static ssize_t brforward_read(struct file *filp, struct kobject *kobj, 879 struct bin_attribute *bin_attr, 880 char *buf, loff_t off, size_t count) 881 { 882 struct device *dev = kobj_to_dev(kobj); 883 struct net_bridge *br = to_bridge(dev); 884 int n; 885 886 /* must read whole records */ 887 if (off % sizeof(struct __fdb_entry) != 0) 888 return -EINVAL; 889 890 n = br_fdb_fillbuf(br, buf, 891 count / sizeof(struct __fdb_entry), 892 off / sizeof(struct __fdb_entry)); 893 894 if (n > 0) 895 n *= sizeof(struct __fdb_entry); 896 897 return n; 898 } 899 900 static struct bin_attribute bridge_forward = { 901 .attr = { .name = SYSFS_BRIDGE_FDB, 902 .mode = S_IRUGO, }, 903 .read = brforward_read, 904 }; 905 906 /* 907 * Add entries in sysfs onto the existing network class device 908 * for the bridge. 909 * Adds a attribute group "bridge" containing tuning parameters. 910 * Binary attribute containing the forward table 911 * Sub directory to hold links to interfaces. 912 * 913 * Note: the ifobj exists only to be a subdirectory 914 * to hold links. The ifobj exists in same data structure 915 * as it's parent the bridge so reference counting works. 916 */ 917 int br_sysfs_addbr(struct net_device *dev) 918 { 919 struct kobject *brobj = &dev->dev.kobj; 920 struct net_bridge *br = netdev_priv(dev); 921 int err; 922 923 err = sysfs_create_group(brobj, &bridge_group); 924 if (err) { 925 pr_info("%s: can't create group %s/%s\n", 926 __func__, dev->name, bridge_group.name); 927 goto out1; 928 } 929 930 err = sysfs_create_bin_file(brobj, &bridge_forward); 931 if (err) { 932 pr_info("%s: can't create attribute file %s/%s\n", 933 __func__, dev->name, bridge_forward.attr.name); 934 goto out2; 935 } 936 937 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj); 938 if (!br->ifobj) { 939 pr_info("%s: can't add kobject (directory) %s/%s\n", 940 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR); 941 err = -ENOMEM; 942 goto out3; 943 } 944 return 0; 945 out3: 946 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward); 947 out2: 948 sysfs_remove_group(&dev->dev.kobj, &bridge_group); 949 out1: 950 return err; 951 952 } 953 954 void br_sysfs_delbr(struct net_device *dev) 955 { 956 struct kobject *kobj = &dev->dev.kobj; 957 struct net_bridge *br = netdev_priv(dev); 958 959 kobject_put(br->ifobj); 960 sysfs_remove_bin_file(kobj, &bridge_forward); 961 sysfs_remove_group(kobj, &bridge_group); 962 } 963