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