1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Sysfs attributes of bridge 4 * Linux ethernet bridge 5 * 6 * Authors: 7 * Stephen Hemminger <shemminger@osdl.org> 8 */ 9 10 #include <linux/capability.h> 11 #include <linux/kernel.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/if_bridge.h> 15 #include <linux/rtnetlink.h> 16 #include <linux/spinlock.h> 17 #include <linux/times.h> 18 #include <linux/sched/signal.h> 19 20 #include "br_private.h" 21 22 /* IMPORTANT: new bridge options must be added with netlink support only 23 * please do not add new sysfs entries 24 */ 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 *br, unsigned long val, 34 struct netlink_ext_ack *extack)) 35 { 36 struct net_bridge *br = to_bridge(d); 37 struct netlink_ext_ack extack = {0}; 38 unsigned long val; 39 int err; 40 41 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN)) 42 return -EPERM; 43 44 err = kstrtoul(buf, 0, &val); 45 if (err != 0) 46 return err; 47 48 if (!rtnl_trylock()) 49 return restart_syscall(); 50 51 err = (*set)(br, val, &extack); 52 if (!err) 53 netdev_state_change(br->dev); 54 if (extack._msg) { 55 if (err) 56 br_err(br, "%s\n", extack._msg); 57 else 58 br_warn(br, "%s\n", extack._msg); 59 } 60 rtnl_unlock(); 61 62 return err ? err : len; 63 } 64 65 66 static ssize_t forward_delay_show(struct device *d, 67 struct device_attribute *attr, char *buf) 68 { 69 struct net_bridge *br = to_bridge(d); 70 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay)); 71 } 72 73 static int set_forward_delay(struct net_bridge *br, unsigned long val, 74 struct netlink_ext_ack *extack) 75 { 76 return br_set_forward_delay(br, val); 77 } 78 79 static ssize_t forward_delay_store(struct device *d, 80 struct device_attribute *attr, 81 const char *buf, size_t len) 82 { 83 return store_bridge_parm(d, buf, len, set_forward_delay); 84 } 85 static DEVICE_ATTR_RW(forward_delay); 86 87 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr, 88 char *buf) 89 { 90 return sprintf(buf, "%lu\n", 91 jiffies_to_clock_t(to_bridge(d)->hello_time)); 92 } 93 94 static int set_hello_time(struct net_bridge *br, unsigned long val, 95 struct netlink_ext_ack *extack) 96 { 97 return br_set_hello_time(br, val); 98 } 99 100 static ssize_t hello_time_store(struct device *d, 101 struct device_attribute *attr, const char *buf, 102 size_t len) 103 { 104 return store_bridge_parm(d, buf, len, set_hello_time); 105 } 106 static DEVICE_ATTR_RW(hello_time); 107 108 static ssize_t max_age_show(struct device *d, struct device_attribute *attr, 109 char *buf) 110 { 111 return sprintf(buf, "%lu\n", 112 jiffies_to_clock_t(to_bridge(d)->max_age)); 113 } 114 115 static int set_max_age(struct net_bridge *br, unsigned long val, 116 struct netlink_ext_ack *extack) 117 { 118 return br_set_max_age(br, val); 119 } 120 121 static ssize_t max_age_store(struct device *d, struct device_attribute *attr, 122 const char *buf, size_t len) 123 { 124 return store_bridge_parm(d, buf, len, set_max_age); 125 } 126 static DEVICE_ATTR_RW(max_age); 127 128 static ssize_t ageing_time_show(struct device *d, 129 struct device_attribute *attr, char *buf) 130 { 131 struct net_bridge *br = to_bridge(d); 132 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time)); 133 } 134 135 static int set_ageing_time(struct net_bridge *br, unsigned long val, 136 struct netlink_ext_ack *extack) 137 { 138 return br_set_ageing_time(br, val); 139 } 140 141 static ssize_t ageing_time_store(struct device *d, 142 struct device_attribute *attr, 143 const char *buf, size_t len) 144 { 145 return store_bridge_parm(d, buf, len, set_ageing_time); 146 } 147 static DEVICE_ATTR_RW(ageing_time); 148 149 static ssize_t stp_state_show(struct device *d, 150 struct device_attribute *attr, char *buf) 151 { 152 struct net_bridge *br = to_bridge(d); 153 return sprintf(buf, "%d\n", br->stp_enabled); 154 } 155 156 157 static int set_stp_state(struct net_bridge *br, unsigned long val, 158 struct netlink_ext_ack *extack) 159 { 160 return br_stp_set_enabled(br, val, extack); 161 } 162 163 static ssize_t stp_state_store(struct device *d, 164 struct device_attribute *attr, const char *buf, 165 size_t len) 166 { 167 return store_bridge_parm(d, buf, len, set_stp_state); 168 } 169 static DEVICE_ATTR_RW(stp_state); 170 171 static ssize_t group_fwd_mask_show(struct device *d, 172 struct device_attribute *attr, 173 char *buf) 174 { 175 struct net_bridge *br = to_bridge(d); 176 return sprintf(buf, "%#x\n", br->group_fwd_mask); 177 } 178 179 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val, 180 struct netlink_ext_ack *extack) 181 { 182 if (val & BR_GROUPFWD_RESTRICTED) 183 return -EINVAL; 184 185 br->group_fwd_mask = val; 186 187 return 0; 188 } 189 190 static ssize_t group_fwd_mask_store(struct device *d, 191 struct device_attribute *attr, 192 const char *buf, 193 size_t len) 194 { 195 return store_bridge_parm(d, buf, len, set_group_fwd_mask); 196 } 197 static DEVICE_ATTR_RW(group_fwd_mask); 198 199 static ssize_t priority_show(struct device *d, struct device_attribute *attr, 200 char *buf) 201 { 202 struct net_bridge *br = to_bridge(d); 203 return sprintf(buf, "%d\n", 204 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]); 205 } 206 207 static int set_priority(struct net_bridge *br, unsigned long val, 208 struct netlink_ext_ack *extack) 209 { 210 br_stp_set_bridge_priority(br, (u16) val); 211 return 0; 212 } 213 214 static ssize_t priority_store(struct device *d, struct device_attribute *attr, 215 const char *buf, size_t len) 216 { 217 return store_bridge_parm(d, buf, len, set_priority); 218 } 219 static DEVICE_ATTR_RW(priority); 220 221 static ssize_t root_id_show(struct device *d, struct device_attribute *attr, 222 char *buf) 223 { 224 return br_show_bridge_id(buf, &to_bridge(d)->designated_root); 225 } 226 static DEVICE_ATTR_RO(root_id); 227 228 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr, 229 char *buf) 230 { 231 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id); 232 } 233 static DEVICE_ATTR_RO(bridge_id); 234 235 static ssize_t root_port_show(struct device *d, struct device_attribute *attr, 236 char *buf) 237 { 238 return sprintf(buf, "%d\n", to_bridge(d)->root_port); 239 } 240 static DEVICE_ATTR_RO(root_port); 241 242 static ssize_t root_path_cost_show(struct device *d, 243 struct device_attribute *attr, char *buf) 244 { 245 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost); 246 } 247 static DEVICE_ATTR_RO(root_path_cost); 248 249 static ssize_t topology_change_show(struct device *d, 250 struct device_attribute *attr, char *buf) 251 { 252 return sprintf(buf, "%d\n", to_bridge(d)->topology_change); 253 } 254 static DEVICE_ATTR_RO(topology_change); 255 256 static ssize_t topology_change_detected_show(struct device *d, 257 struct device_attribute *attr, 258 char *buf) 259 { 260 struct net_bridge *br = to_bridge(d); 261 return sprintf(buf, "%d\n", br->topology_change_detected); 262 } 263 static DEVICE_ATTR_RO(topology_change_detected); 264 265 static ssize_t hello_timer_show(struct device *d, 266 struct device_attribute *attr, char *buf) 267 { 268 struct net_bridge *br = to_bridge(d); 269 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer)); 270 } 271 static DEVICE_ATTR_RO(hello_timer); 272 273 static ssize_t tcn_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->tcn_timer)); 278 } 279 static DEVICE_ATTR_RO(tcn_timer); 280 281 static ssize_t topology_change_timer_show(struct device *d, 282 struct device_attribute *attr, 283 char *buf) 284 { 285 struct net_bridge *br = to_bridge(d); 286 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer)); 287 } 288 static DEVICE_ATTR_RO(topology_change_timer); 289 290 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr, 291 char *buf) 292 { 293 struct net_bridge *br = to_bridge(d); 294 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer)); 295 } 296 static DEVICE_ATTR_RO(gc_timer); 297 298 static ssize_t group_addr_show(struct device *d, 299 struct device_attribute *attr, char *buf) 300 { 301 struct net_bridge *br = to_bridge(d); 302 return sprintf(buf, "%pM\n", br->group_addr); 303 } 304 305 static ssize_t group_addr_store(struct device *d, 306 struct device_attribute *attr, 307 const char *buf, size_t len) 308 { 309 struct net_bridge *br = to_bridge(d); 310 u8 new_addr[6]; 311 312 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN)) 313 return -EPERM; 314 315 if (!mac_pton(buf, new_addr)) 316 return -EINVAL; 317 318 if (!is_link_local_ether_addr(new_addr)) 319 return -EINVAL; 320 321 if (new_addr[5] == 1 || /* 802.3x Pause address */ 322 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 323 new_addr[5] == 3) /* 802.1X PAE address */ 324 return -EINVAL; 325 326 if (!rtnl_trylock()) 327 return restart_syscall(); 328 329 spin_lock_bh(&br->lock); 330 ether_addr_copy(br->group_addr, new_addr); 331 spin_unlock_bh(&br->lock); 332 333 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true); 334 br_recalculate_fwd_mask(br); 335 netdev_state_change(br->dev); 336 337 rtnl_unlock(); 338 339 return len; 340 } 341 342 static DEVICE_ATTR_RW(group_addr); 343 344 static int set_flush(struct net_bridge *br, unsigned long val, 345 struct netlink_ext_ack *extack) 346 { 347 br_fdb_flush(br); 348 return 0; 349 } 350 351 static ssize_t flush_store(struct device *d, 352 struct device_attribute *attr, 353 const char *buf, size_t len) 354 { 355 return store_bridge_parm(d, buf, len, set_flush); 356 } 357 static DEVICE_ATTR_WO(flush); 358 359 static ssize_t no_linklocal_learn_show(struct device *d, 360 struct device_attribute *attr, 361 char *buf) 362 { 363 struct net_bridge *br = to_bridge(d); 364 return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN)); 365 } 366 367 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val, 368 struct netlink_ext_ack *extack) 369 { 370 return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, extack); 371 } 372 373 static ssize_t no_linklocal_learn_store(struct device *d, 374 struct device_attribute *attr, 375 const char *buf, size_t len) 376 { 377 return store_bridge_parm(d, buf, len, set_no_linklocal_learn); 378 } 379 static DEVICE_ATTR_RW(no_linklocal_learn); 380 381 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 382 static ssize_t multicast_router_show(struct device *d, 383 struct device_attribute *attr, char *buf) 384 { 385 struct net_bridge *br = to_bridge(d); 386 return sprintf(buf, "%d\n", br->multicast_ctx.multicast_router); 387 } 388 389 static int set_multicast_router(struct net_bridge *br, unsigned long val, 390 struct netlink_ext_ack *extack) 391 { 392 return br_multicast_set_router(&br->multicast_ctx, val); 393 } 394 395 static ssize_t multicast_router_store(struct device *d, 396 struct device_attribute *attr, 397 const char *buf, size_t len) 398 { 399 return store_bridge_parm(d, buf, len, set_multicast_router); 400 } 401 static DEVICE_ATTR_RW(multicast_router); 402 403 static ssize_t multicast_snooping_show(struct device *d, 404 struct device_attribute *attr, 405 char *buf) 406 { 407 struct net_bridge *br = to_bridge(d); 408 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED)); 409 } 410 411 static ssize_t multicast_snooping_store(struct device *d, 412 struct device_attribute *attr, 413 const char *buf, size_t len) 414 { 415 return store_bridge_parm(d, buf, len, br_multicast_toggle); 416 } 417 static DEVICE_ATTR_RW(multicast_snooping); 418 419 static ssize_t multicast_query_use_ifaddr_show(struct device *d, 420 struct device_attribute *attr, 421 char *buf) 422 { 423 struct net_bridge *br = to_bridge(d); 424 return sprintf(buf, "%d\n", 425 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)); 426 } 427 428 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val, 429 struct netlink_ext_ack *extack) 430 { 431 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val); 432 return 0; 433 } 434 435 static ssize_t 436 multicast_query_use_ifaddr_store(struct device *d, 437 struct device_attribute *attr, 438 const char *buf, size_t len) 439 { 440 return store_bridge_parm(d, buf, len, set_query_use_ifaddr); 441 } 442 static DEVICE_ATTR_RW(multicast_query_use_ifaddr); 443 444 static ssize_t multicast_querier_show(struct device *d, 445 struct device_attribute *attr, 446 char *buf) 447 { 448 struct net_bridge *br = to_bridge(d); 449 return sprintf(buf, "%d\n", br->multicast_ctx.multicast_querier); 450 } 451 452 static int set_multicast_querier(struct net_bridge *br, unsigned long val, 453 struct netlink_ext_ack *extack) 454 { 455 return br_multicast_set_querier(&br->multicast_ctx, val); 456 } 457 458 static ssize_t multicast_querier_store(struct device *d, 459 struct device_attribute *attr, 460 const char *buf, size_t len) 461 { 462 return store_bridge_parm(d, buf, len, set_multicast_querier); 463 } 464 static DEVICE_ATTR_RW(multicast_querier); 465 466 static ssize_t hash_elasticity_show(struct device *d, 467 struct device_attribute *attr, char *buf) 468 { 469 return sprintf(buf, "%u\n", RHT_ELASTICITY); 470 } 471 472 static int set_elasticity(struct net_bridge *br, unsigned long val, 473 struct netlink_ext_ack *extack) 474 { 475 /* 16 is RHT_ELASTICITY */ 476 NL_SET_ERR_MSG_MOD(extack, 477 "the hash_elasticity option has been deprecated and is always 16"); 478 return 0; 479 } 480 481 static ssize_t hash_elasticity_store(struct device *d, 482 struct device_attribute *attr, 483 const char *buf, size_t len) 484 { 485 return store_bridge_parm(d, buf, len, set_elasticity); 486 } 487 static DEVICE_ATTR_RW(hash_elasticity); 488 489 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr, 490 char *buf) 491 { 492 struct net_bridge *br = to_bridge(d); 493 return sprintf(buf, "%u\n", br->hash_max); 494 } 495 496 static int set_hash_max(struct net_bridge *br, unsigned long val, 497 struct netlink_ext_ack *extack) 498 { 499 br->hash_max = val; 500 return 0; 501 } 502 503 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr, 504 const char *buf, size_t len) 505 { 506 return store_bridge_parm(d, buf, len, set_hash_max); 507 } 508 static DEVICE_ATTR_RW(hash_max); 509 510 static ssize_t multicast_igmp_version_show(struct device *d, 511 struct device_attribute *attr, 512 char *buf) 513 { 514 struct net_bridge *br = to_bridge(d); 515 516 return sprintf(buf, "%u\n", br->multicast_ctx.multicast_igmp_version); 517 } 518 519 static int set_multicast_igmp_version(struct net_bridge *br, unsigned long val, 520 struct netlink_ext_ack *extack) 521 { 522 return br_multicast_set_igmp_version(&br->multicast_ctx, val); 523 } 524 525 static ssize_t multicast_igmp_version_store(struct device *d, 526 struct device_attribute *attr, 527 const char *buf, size_t len) 528 { 529 return store_bridge_parm(d, buf, len, set_multicast_igmp_version); 530 } 531 static DEVICE_ATTR_RW(multicast_igmp_version); 532 533 static ssize_t multicast_last_member_count_show(struct device *d, 534 struct device_attribute *attr, 535 char *buf) 536 { 537 struct net_bridge *br = to_bridge(d); 538 return sprintf(buf, "%u\n", br->multicast_ctx.multicast_last_member_count); 539 } 540 541 static int set_last_member_count(struct net_bridge *br, unsigned long val, 542 struct netlink_ext_ack *extack) 543 { 544 br->multicast_ctx.multicast_last_member_count = val; 545 return 0; 546 } 547 548 static ssize_t multicast_last_member_count_store(struct device *d, 549 struct device_attribute *attr, 550 const char *buf, size_t len) 551 { 552 return store_bridge_parm(d, buf, len, set_last_member_count); 553 } 554 static DEVICE_ATTR_RW(multicast_last_member_count); 555 556 static ssize_t multicast_startup_query_count_show( 557 struct device *d, struct device_attribute *attr, char *buf) 558 { 559 struct net_bridge *br = to_bridge(d); 560 return sprintf(buf, "%u\n", br->multicast_ctx.multicast_startup_query_count); 561 } 562 563 static int set_startup_query_count(struct net_bridge *br, unsigned long val, 564 struct netlink_ext_ack *extack) 565 { 566 br->multicast_ctx.multicast_startup_query_count = val; 567 return 0; 568 } 569 570 static ssize_t multicast_startup_query_count_store( 571 struct device *d, struct device_attribute *attr, const char *buf, 572 size_t len) 573 { 574 return store_bridge_parm(d, buf, len, set_startup_query_count); 575 } 576 static DEVICE_ATTR_RW(multicast_startup_query_count); 577 578 static ssize_t multicast_last_member_interval_show( 579 struct device *d, struct device_attribute *attr, char *buf) 580 { 581 struct net_bridge *br = to_bridge(d); 582 return sprintf(buf, "%lu\n", 583 jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval)); 584 } 585 586 static int set_last_member_interval(struct net_bridge *br, unsigned long val, 587 struct netlink_ext_ack *extack) 588 { 589 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val); 590 return 0; 591 } 592 593 static ssize_t multicast_last_member_interval_store( 594 struct device *d, struct device_attribute *attr, const char *buf, 595 size_t len) 596 { 597 return store_bridge_parm(d, buf, len, set_last_member_interval); 598 } 599 static DEVICE_ATTR_RW(multicast_last_member_interval); 600 601 static ssize_t multicast_membership_interval_show( 602 struct device *d, struct device_attribute *attr, char *buf) 603 { 604 struct net_bridge *br = to_bridge(d); 605 return sprintf(buf, "%lu\n", 606 jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval)); 607 } 608 609 static int set_membership_interval(struct net_bridge *br, unsigned long val, 610 struct netlink_ext_ack *extack) 611 { 612 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val); 613 return 0; 614 } 615 616 static ssize_t multicast_membership_interval_store( 617 struct device *d, struct device_attribute *attr, const char *buf, 618 size_t len) 619 { 620 return store_bridge_parm(d, buf, len, set_membership_interval); 621 } 622 static DEVICE_ATTR_RW(multicast_membership_interval); 623 624 static ssize_t multicast_querier_interval_show(struct device *d, 625 struct device_attribute *attr, 626 char *buf) 627 { 628 struct net_bridge *br = to_bridge(d); 629 return sprintf(buf, "%lu\n", 630 jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval)); 631 } 632 633 static int set_querier_interval(struct net_bridge *br, unsigned long val, 634 struct netlink_ext_ack *extack) 635 { 636 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val); 637 return 0; 638 } 639 640 static ssize_t multicast_querier_interval_store(struct device *d, 641 struct device_attribute *attr, 642 const char *buf, size_t len) 643 { 644 return store_bridge_parm(d, buf, len, set_querier_interval); 645 } 646 static DEVICE_ATTR_RW(multicast_querier_interval); 647 648 static ssize_t multicast_query_interval_show(struct device *d, 649 struct device_attribute *attr, 650 char *buf) 651 { 652 struct net_bridge *br = to_bridge(d); 653 return sprintf(buf, "%lu\n", 654 jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval)); 655 } 656 657 static int set_query_interval(struct net_bridge *br, unsigned long val, 658 struct netlink_ext_ack *extack) 659 { 660 br_multicast_set_query_intvl(&br->multicast_ctx, val); 661 return 0; 662 } 663 664 static ssize_t multicast_query_interval_store(struct device *d, 665 struct device_attribute *attr, 666 const char *buf, size_t len) 667 { 668 return store_bridge_parm(d, buf, len, set_query_interval); 669 } 670 static DEVICE_ATTR_RW(multicast_query_interval); 671 672 static ssize_t multicast_query_response_interval_show( 673 struct device *d, struct device_attribute *attr, char *buf) 674 { 675 struct net_bridge *br = to_bridge(d); 676 return sprintf( 677 buf, "%lu\n", 678 jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval)); 679 } 680 681 static int set_query_response_interval(struct net_bridge *br, unsigned long val, 682 struct netlink_ext_ack *extack) 683 { 684 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val); 685 return 0; 686 } 687 688 static ssize_t multicast_query_response_interval_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_query_response_interval); 693 } 694 static DEVICE_ATTR_RW(multicast_query_response_interval); 695 696 static ssize_t multicast_startup_query_interval_show( 697 struct device *d, struct device_attribute *attr, char *buf) 698 { 699 struct net_bridge *br = to_bridge(d); 700 return sprintf( 701 buf, "%lu\n", 702 jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval)); 703 } 704 705 static int set_startup_query_interval(struct net_bridge *br, unsigned long val, 706 struct netlink_ext_ack *extack) 707 { 708 br_multicast_set_startup_query_intvl(&br->multicast_ctx, val); 709 return 0; 710 } 711 712 static ssize_t multicast_startup_query_interval_store( 713 struct device *d, struct device_attribute *attr, const char *buf, 714 size_t len) 715 { 716 return store_bridge_parm(d, buf, len, set_startup_query_interval); 717 } 718 static DEVICE_ATTR_RW(multicast_startup_query_interval); 719 720 static ssize_t multicast_stats_enabled_show(struct device *d, 721 struct device_attribute *attr, 722 char *buf) 723 { 724 struct net_bridge *br = to_bridge(d); 725 726 return sprintf(buf, "%d\n", 727 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)); 728 } 729 730 static int set_stats_enabled(struct net_bridge *br, unsigned long val, 731 struct netlink_ext_ack *extack) 732 { 733 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val); 734 return 0; 735 } 736 737 static ssize_t multicast_stats_enabled_store(struct device *d, 738 struct device_attribute *attr, 739 const char *buf, 740 size_t len) 741 { 742 return store_bridge_parm(d, buf, len, set_stats_enabled); 743 } 744 static DEVICE_ATTR_RW(multicast_stats_enabled); 745 746 #if IS_ENABLED(CONFIG_IPV6) 747 static ssize_t multicast_mld_version_show(struct device *d, 748 struct device_attribute *attr, 749 char *buf) 750 { 751 struct net_bridge *br = to_bridge(d); 752 753 return sprintf(buf, "%u\n", br->multicast_ctx.multicast_mld_version); 754 } 755 756 static int set_multicast_mld_version(struct net_bridge *br, unsigned long val, 757 struct netlink_ext_ack *extack) 758 { 759 return br_multicast_set_mld_version(&br->multicast_ctx, val); 760 } 761 762 static ssize_t multicast_mld_version_store(struct device *d, 763 struct device_attribute *attr, 764 const char *buf, size_t len) 765 { 766 return store_bridge_parm(d, buf, len, set_multicast_mld_version); 767 } 768 static DEVICE_ATTR_RW(multicast_mld_version); 769 #endif 770 #endif 771 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 772 static ssize_t nf_call_iptables_show( 773 struct device *d, struct device_attribute *attr, char *buf) 774 { 775 struct net_bridge *br = to_bridge(d); 776 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES)); 777 } 778 779 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val, 780 struct netlink_ext_ack *extack) 781 { 782 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val); 783 return 0; 784 } 785 786 static ssize_t nf_call_iptables_store( 787 struct device *d, struct device_attribute *attr, const char *buf, 788 size_t len) 789 { 790 return store_bridge_parm(d, buf, len, set_nf_call_iptables); 791 } 792 static DEVICE_ATTR_RW(nf_call_iptables); 793 794 static ssize_t nf_call_ip6tables_show( 795 struct device *d, struct device_attribute *attr, char *buf) 796 { 797 struct net_bridge *br = to_bridge(d); 798 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES)); 799 } 800 801 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val, 802 struct netlink_ext_ack *extack) 803 { 804 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val); 805 return 0; 806 } 807 808 static ssize_t nf_call_ip6tables_store( 809 struct device *d, struct device_attribute *attr, const char *buf, 810 size_t len) 811 { 812 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables); 813 } 814 static DEVICE_ATTR_RW(nf_call_ip6tables); 815 816 static ssize_t nf_call_arptables_show( 817 struct device *d, struct device_attribute *attr, char *buf) 818 { 819 struct net_bridge *br = to_bridge(d); 820 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES)); 821 } 822 823 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val, 824 struct netlink_ext_ack *extack) 825 { 826 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val); 827 return 0; 828 } 829 830 static ssize_t nf_call_arptables_store( 831 struct device *d, struct device_attribute *attr, const char *buf, 832 size_t len) 833 { 834 return store_bridge_parm(d, buf, len, set_nf_call_arptables); 835 } 836 static DEVICE_ATTR_RW(nf_call_arptables); 837 #endif 838 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 839 static ssize_t vlan_filtering_show(struct device *d, 840 struct device_attribute *attr, 841 char *buf) 842 { 843 struct net_bridge *br = to_bridge(d); 844 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED)); 845 } 846 847 static ssize_t vlan_filtering_store(struct device *d, 848 struct device_attribute *attr, 849 const char *buf, size_t len) 850 { 851 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle); 852 } 853 static DEVICE_ATTR_RW(vlan_filtering); 854 855 static ssize_t vlan_protocol_show(struct device *d, 856 struct device_attribute *attr, 857 char *buf) 858 { 859 struct net_bridge *br = to_bridge(d); 860 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto)); 861 } 862 863 static ssize_t vlan_protocol_store(struct device *d, 864 struct device_attribute *attr, 865 const char *buf, size_t len) 866 { 867 return store_bridge_parm(d, buf, len, br_vlan_set_proto); 868 } 869 static DEVICE_ATTR_RW(vlan_protocol); 870 871 static ssize_t default_pvid_show(struct device *d, 872 struct device_attribute *attr, 873 char *buf) 874 { 875 struct net_bridge *br = to_bridge(d); 876 return sprintf(buf, "%d\n", br->default_pvid); 877 } 878 879 static ssize_t default_pvid_store(struct device *d, 880 struct device_attribute *attr, 881 const char *buf, size_t len) 882 { 883 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid); 884 } 885 static DEVICE_ATTR_RW(default_pvid); 886 887 static ssize_t vlan_stats_enabled_show(struct device *d, 888 struct device_attribute *attr, 889 char *buf) 890 { 891 struct net_bridge *br = to_bridge(d); 892 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED)); 893 } 894 895 static int set_vlan_stats_enabled(struct net_bridge *br, unsigned long val, 896 struct netlink_ext_ack *extack) 897 { 898 return br_vlan_set_stats(br, val); 899 } 900 901 static ssize_t vlan_stats_enabled_store(struct device *d, 902 struct device_attribute *attr, 903 const char *buf, size_t len) 904 { 905 return store_bridge_parm(d, buf, len, set_vlan_stats_enabled); 906 } 907 static DEVICE_ATTR_RW(vlan_stats_enabled); 908 909 static ssize_t vlan_stats_per_port_show(struct device *d, 910 struct device_attribute *attr, 911 char *buf) 912 { 913 struct net_bridge *br = to_bridge(d); 914 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)); 915 } 916 917 static int set_vlan_stats_per_port(struct net_bridge *br, unsigned long val, 918 struct netlink_ext_ack *extack) 919 { 920 return br_vlan_set_stats_per_port(br, val); 921 } 922 923 static ssize_t vlan_stats_per_port_store(struct device *d, 924 struct device_attribute *attr, 925 const char *buf, size_t len) 926 { 927 return store_bridge_parm(d, buf, len, set_vlan_stats_per_port); 928 } 929 static DEVICE_ATTR_RW(vlan_stats_per_port); 930 #endif 931 932 static struct attribute *bridge_attrs[] = { 933 &dev_attr_forward_delay.attr, 934 &dev_attr_hello_time.attr, 935 &dev_attr_max_age.attr, 936 &dev_attr_ageing_time.attr, 937 &dev_attr_stp_state.attr, 938 &dev_attr_group_fwd_mask.attr, 939 &dev_attr_priority.attr, 940 &dev_attr_bridge_id.attr, 941 &dev_attr_root_id.attr, 942 &dev_attr_root_path_cost.attr, 943 &dev_attr_root_port.attr, 944 &dev_attr_topology_change.attr, 945 &dev_attr_topology_change_detected.attr, 946 &dev_attr_hello_timer.attr, 947 &dev_attr_tcn_timer.attr, 948 &dev_attr_topology_change_timer.attr, 949 &dev_attr_gc_timer.attr, 950 &dev_attr_group_addr.attr, 951 &dev_attr_flush.attr, 952 &dev_attr_no_linklocal_learn.attr, 953 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 954 &dev_attr_multicast_router.attr, 955 &dev_attr_multicast_snooping.attr, 956 &dev_attr_multicast_querier.attr, 957 &dev_attr_multicast_query_use_ifaddr.attr, 958 &dev_attr_hash_elasticity.attr, 959 &dev_attr_hash_max.attr, 960 &dev_attr_multicast_last_member_count.attr, 961 &dev_attr_multicast_startup_query_count.attr, 962 &dev_attr_multicast_last_member_interval.attr, 963 &dev_attr_multicast_membership_interval.attr, 964 &dev_attr_multicast_querier_interval.attr, 965 &dev_attr_multicast_query_interval.attr, 966 &dev_attr_multicast_query_response_interval.attr, 967 &dev_attr_multicast_startup_query_interval.attr, 968 &dev_attr_multicast_stats_enabled.attr, 969 &dev_attr_multicast_igmp_version.attr, 970 #if IS_ENABLED(CONFIG_IPV6) 971 &dev_attr_multicast_mld_version.attr, 972 #endif 973 #endif 974 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 975 &dev_attr_nf_call_iptables.attr, 976 &dev_attr_nf_call_ip6tables.attr, 977 &dev_attr_nf_call_arptables.attr, 978 #endif 979 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 980 &dev_attr_vlan_filtering.attr, 981 &dev_attr_vlan_protocol.attr, 982 &dev_attr_default_pvid.attr, 983 &dev_attr_vlan_stats_enabled.attr, 984 &dev_attr_vlan_stats_per_port.attr, 985 #endif 986 NULL 987 }; 988 989 static const struct attribute_group bridge_group = { 990 .name = SYSFS_BRIDGE_ATTR, 991 .attrs = bridge_attrs, 992 }; 993 994 /* 995 * Export the forwarding information table as a binary file 996 * The records are struct __fdb_entry. 997 * 998 * Returns the number of bytes read. 999 */ 1000 static ssize_t brforward_read(struct file *filp, struct kobject *kobj, 1001 struct bin_attribute *bin_attr, 1002 char *buf, loff_t off, size_t count) 1003 { 1004 struct device *dev = kobj_to_dev(kobj); 1005 struct net_bridge *br = to_bridge(dev); 1006 int n; 1007 1008 /* must read whole records */ 1009 if (off % sizeof(struct __fdb_entry) != 0) 1010 return -EINVAL; 1011 1012 n = br_fdb_fillbuf(br, buf, 1013 count / sizeof(struct __fdb_entry), 1014 off / sizeof(struct __fdb_entry)); 1015 1016 if (n > 0) 1017 n *= sizeof(struct __fdb_entry); 1018 1019 return n; 1020 } 1021 1022 static struct bin_attribute bridge_forward = { 1023 .attr = { .name = SYSFS_BRIDGE_FDB, 1024 .mode = 0444, }, 1025 .read = brforward_read, 1026 }; 1027 1028 /* 1029 * Add entries in sysfs onto the existing network class device 1030 * for the bridge. 1031 * Adds a attribute group "bridge" containing tuning parameters. 1032 * Binary attribute containing the forward table 1033 * Sub directory to hold links to interfaces. 1034 * 1035 * Note: the ifobj exists only to be a subdirectory 1036 * to hold links. The ifobj exists in same data structure 1037 * as it's parent the bridge so reference counting works. 1038 */ 1039 int br_sysfs_addbr(struct net_device *dev) 1040 { 1041 struct kobject *brobj = &dev->dev.kobj; 1042 struct net_bridge *br = netdev_priv(dev); 1043 int err; 1044 1045 err = sysfs_create_group(brobj, &bridge_group); 1046 if (err) { 1047 pr_info("%s: can't create group %s/%s\n", 1048 __func__, dev->name, bridge_group.name); 1049 goto out1; 1050 } 1051 1052 err = sysfs_create_bin_file(brobj, &bridge_forward); 1053 if (err) { 1054 pr_info("%s: can't create attribute file %s/%s\n", 1055 __func__, dev->name, bridge_forward.attr.name); 1056 goto out2; 1057 } 1058 1059 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj); 1060 if (!br->ifobj) { 1061 pr_info("%s: can't add kobject (directory) %s/%s\n", 1062 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR); 1063 err = -ENOMEM; 1064 goto out3; 1065 } 1066 return 0; 1067 out3: 1068 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward); 1069 out2: 1070 sysfs_remove_group(&dev->dev.kobj, &bridge_group); 1071 out1: 1072 return err; 1073 1074 } 1075 1076 void br_sysfs_delbr(struct net_device *dev) 1077 { 1078 struct kobject *kobj = &dev->dev.kobj; 1079 struct net_bridge *br = netdev_priv(dev); 1080 1081 kobject_put(br->ifobj); 1082 sysfs_remove_bin_file(kobj, &bridge_forward); 1083 sysfs_remove_group(kobj, &bridge_group); 1084 } 1085