1/* 2 * Sysfs attributes of bridge ports 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/if_bridge.h> 18#include <linux/rtnetlink.h> 19#include <linux/spinlock.h> 20#include <linux/times.h> 21 22#include "br_private.h" 23 24#define to_dev(obj) container_of(obj, struct device, kobj) 25#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd))) 26 27/* 28 * Common code for storing bridge parameters. 29 */ 30static 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 (!capable(CAP_NET_ADMIN)) 40 return -EPERM; 41 42 val = simple_strtoul(buf, &endp, 0); 43 if (endp == buf) 44 return -EINVAL; 45 46 spin_lock_bh(&br->lock); 47 err = (*set)(br, val); 48 spin_unlock_bh(&br->lock); 49 return err ? err : len; 50} 51 52 53static ssize_t show_forward_delay(struct device *d, 54 struct device_attribute *attr, char *buf) 55{ 56 struct net_bridge *br = to_bridge(d); 57 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay)); 58} 59 60static int set_forward_delay(struct net_bridge *br, unsigned long val) 61{ 62 unsigned long delay = clock_t_to_jiffies(val); 63 br->forward_delay = delay; 64 if (br_is_root_bridge(br)) 65 br->bridge_forward_delay = delay; 66 return 0; 67} 68 69static ssize_t store_forward_delay(struct device *d, 70 struct device_attribute *attr, 71 const char *buf, size_t len) 72{ 73 return store_bridge_parm(d, buf, len, set_forward_delay); 74} 75static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR, 76 show_forward_delay, store_forward_delay); 77 78static ssize_t show_hello_time(struct device *d, struct device_attribute *attr, 79 char *buf) 80{ 81 return sprintf(buf, "%lu\n", 82 jiffies_to_clock_t(to_bridge(d)->hello_time)); 83} 84 85static int set_hello_time(struct net_bridge *br, unsigned long val) 86{ 87 unsigned long t = clock_t_to_jiffies(val); 88 89 if (t < HZ) 90 return -EINVAL; 91 92 br->hello_time = t; 93 if (br_is_root_bridge(br)) 94 br->bridge_hello_time = t; 95 return 0; 96} 97 98static ssize_t store_hello_time(struct device *d, 99 struct device_attribute *attr, const char *buf, 100 size_t len) 101{ 102 return store_bridge_parm(d, buf, len, set_hello_time); 103} 104static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time, 105 store_hello_time); 106 107static ssize_t show_max_age(struct device *d, struct device_attribute *attr, 108 char *buf) 109{ 110 return sprintf(buf, "%lu\n", 111 jiffies_to_clock_t(to_bridge(d)->max_age)); 112} 113 114static int set_max_age(struct net_bridge *br, unsigned long val) 115{ 116 unsigned long t = clock_t_to_jiffies(val); 117 br->max_age = t; 118 if (br_is_root_bridge(br)) 119 br->bridge_max_age = t; 120 return 0; 121} 122 123static ssize_t store_max_age(struct device *d, struct device_attribute *attr, 124 const char *buf, size_t len) 125{ 126 return store_bridge_parm(d, buf, len, set_max_age); 127} 128static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age); 129 130static ssize_t show_ageing_time(struct device *d, 131 struct device_attribute *attr, char *buf) 132{ 133 struct net_bridge *br = to_bridge(d); 134 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time)); 135} 136 137static int set_ageing_time(struct net_bridge *br, unsigned long val) 138{ 139 br->ageing_time = clock_t_to_jiffies(val); 140 return 0; 141} 142 143static ssize_t store_ageing_time(struct device *d, 144 struct device_attribute *attr, 145 const char *buf, size_t len) 146{ 147 return store_bridge_parm(d, buf, len, set_ageing_time); 148} 149static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time, 150 store_ageing_time); 151 152static ssize_t show_stp_state(struct device *d, 153 struct device_attribute *attr, char *buf) 154{ 155 struct net_bridge *br = to_bridge(d); 156 return sprintf(buf, "%d\n", br->stp_enabled); 157} 158 159 160static ssize_t store_stp_state(struct device *d, 161 struct device_attribute *attr, const char *buf, 162 size_t len) 163{ 164 struct net_bridge *br = to_bridge(d); 165 char *endp; 166 unsigned long val; 167 168 if (!capable(CAP_NET_ADMIN)) 169 return -EPERM; 170 171 val = simple_strtoul(buf, &endp, 0); 172 if (endp == buf) 173 return -EINVAL; 174 175 if (!rtnl_trylock()) 176 return restart_syscall(); 177 br_stp_set_enabled(br, val); 178 rtnl_unlock(); 179 180 return len; 181} 182static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state, 183 store_stp_state); 184 185static ssize_t show_priority(struct device *d, struct device_attribute *attr, 186 char *buf) 187{ 188 struct net_bridge *br = to_bridge(d); 189 return sprintf(buf, "%d\n", 190 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]); 191} 192 193static int set_priority(struct net_bridge *br, unsigned long val) 194{ 195 br_stp_set_bridge_priority(br, (u16) val); 196 return 0; 197} 198 199static ssize_t store_priority(struct device *d, struct device_attribute *attr, 200 const char *buf, size_t len) 201{ 202 return store_bridge_parm(d, buf, len, set_priority); 203} 204static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority); 205 206static ssize_t show_root_id(struct device *d, struct device_attribute *attr, 207 char *buf) 208{ 209 return br_show_bridge_id(buf, &to_bridge(d)->designated_root); 210} 211static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL); 212 213static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr, 214 char *buf) 215{ 216 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id); 217} 218static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL); 219 220static ssize_t show_root_port(struct device *d, struct device_attribute *attr, 221 char *buf) 222{ 223 return sprintf(buf, "%d\n", to_bridge(d)->root_port); 224} 225static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL); 226 227static ssize_t show_root_path_cost(struct device *d, 228 struct device_attribute *attr, char *buf) 229{ 230 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost); 231} 232static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL); 233 234static ssize_t show_topology_change(struct device *d, 235 struct device_attribute *attr, char *buf) 236{ 237 return sprintf(buf, "%d\n", to_bridge(d)->topology_change); 238} 239static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL); 240 241static ssize_t show_topology_change_detected(struct device *d, 242 struct device_attribute *attr, 243 char *buf) 244{ 245 struct net_bridge *br = to_bridge(d); 246 return sprintf(buf, "%d\n", br->topology_change_detected); 247} 248static DEVICE_ATTR(topology_change_detected, S_IRUGO, 249 show_topology_change_detected, NULL); 250 251static ssize_t show_hello_timer(struct device *d, 252 struct device_attribute *attr, char *buf) 253{ 254 struct net_bridge *br = to_bridge(d); 255 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer)); 256} 257static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL); 258 259static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr, 260 char *buf) 261{ 262 struct net_bridge *br = to_bridge(d); 263 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer)); 264} 265static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL); 266 267static ssize_t show_topology_change_timer(struct device *d, 268 struct device_attribute *attr, 269 char *buf) 270{ 271 struct net_bridge *br = to_bridge(d); 272 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer)); 273} 274static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, 275 NULL); 276 277static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr, 278 char *buf) 279{ 280 struct net_bridge *br = to_bridge(d); 281 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer)); 282} 283static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL); 284 285static ssize_t show_group_addr(struct device *d, 286 struct device_attribute *attr, char *buf) 287{ 288 struct net_bridge *br = to_bridge(d); 289 return sprintf(buf, "%x:%x:%x:%x:%x:%x\n", 290 br->group_addr[0], br->group_addr[1], 291 br->group_addr[2], br->group_addr[3], 292 br->group_addr[4], br->group_addr[5]); 293} 294 295static ssize_t store_group_addr(struct device *d, 296 struct device_attribute *attr, 297 const char *buf, size_t len) 298{ 299 struct net_bridge *br = to_bridge(d); 300 unsigned new_addr[6]; 301 int i; 302 303 if (!capable(CAP_NET_ADMIN)) 304 return -EPERM; 305 306 if (sscanf(buf, "%x:%x:%x:%x:%x:%x", 307 &new_addr[0], &new_addr[1], &new_addr[2], 308 &new_addr[3], &new_addr[4], &new_addr[5]) != 6) 309 return -EINVAL; 310 311 /* Must be 01:80:c2:00:00:0X */ 312 for (i = 0; i < 5; i++) 313 if (new_addr[i] != br_group_address[i]) 314 return -EINVAL; 315 316 if (new_addr[5] & ~0xf) 317 return -EINVAL; 318 319 if (new_addr[5] == 1 || /* 802.3x Pause address */ 320 new_addr[5] == 2 || /* 802.3ad Slow protocols */ 321 new_addr[5] == 3) /* 802.1X PAE address */ 322 return -EINVAL; 323 324 spin_lock_bh(&br->lock); 325 for (i = 0; i < 6; i++) 326 br->group_addr[i] = new_addr[i]; 327 spin_unlock_bh(&br->lock); 328 return len; 329} 330 331static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR, 332 show_group_addr, store_group_addr); 333 334static ssize_t store_flush(struct device *d, 335 struct device_attribute *attr, 336 const char *buf, size_t len) 337{ 338 struct net_bridge *br = to_bridge(d); 339 340 if (!capable(CAP_NET_ADMIN)) 341 return -EPERM; 342 343 br_fdb_flush(br); 344 return len; 345} 346static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush); 347 348#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 349static ssize_t show_multicast_router(struct device *d, 350 struct device_attribute *attr, char *buf) 351{ 352 struct net_bridge *br = to_bridge(d); 353 return sprintf(buf, "%d\n", br->multicast_router); 354} 355 356static ssize_t store_multicast_router(struct device *d, 357 struct device_attribute *attr, 358 const char *buf, size_t len) 359{ 360 return store_bridge_parm(d, buf, len, br_multicast_set_router); 361} 362static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router, 363 store_multicast_router); 364 365static ssize_t show_multicast_snooping(struct device *d, 366 struct device_attribute *attr, 367 char *buf) 368{ 369 struct net_bridge *br = to_bridge(d); 370 return sprintf(buf, "%d\n", !br->multicast_disabled); 371} 372 373static ssize_t store_multicast_snooping(struct device *d, 374 struct device_attribute *attr, 375 const char *buf, size_t len) 376{ 377 return store_bridge_parm(d, buf, len, br_multicast_toggle); 378} 379static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR, 380 show_multicast_snooping, store_multicast_snooping); 381 382static ssize_t show_hash_elasticity(struct device *d, 383 struct device_attribute *attr, char *buf) 384{ 385 struct net_bridge *br = to_bridge(d); 386 return sprintf(buf, "%u\n", br->hash_elasticity); 387} 388 389static int set_elasticity(struct net_bridge *br, unsigned long val) 390{ 391 br->hash_elasticity = val; 392 return 0; 393} 394 395static ssize_t store_hash_elasticity(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_elasticity); 400} 401static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity, 402 store_hash_elasticity); 403 404static ssize_t show_hash_max(struct device *d, struct device_attribute *attr, 405 char *buf) 406{ 407 struct net_bridge *br = to_bridge(d); 408 return sprintf(buf, "%u\n", br->hash_max); 409} 410 411static ssize_t store_hash_max(struct device *d, struct device_attribute *attr, 412 const char *buf, size_t len) 413{ 414 return store_bridge_parm(d, buf, len, br_multicast_set_hash_max); 415} 416static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max, 417 store_hash_max); 418 419static ssize_t show_multicast_last_member_count(struct device *d, 420 struct device_attribute *attr, 421 char *buf) 422{ 423 struct net_bridge *br = to_bridge(d); 424 return sprintf(buf, "%u\n", br->multicast_last_member_count); 425} 426 427static int set_last_member_count(struct net_bridge *br, unsigned long val) 428{ 429 br->multicast_last_member_count = val; 430 return 0; 431} 432 433static ssize_t store_multicast_last_member_count(struct device *d, 434 struct device_attribute *attr, 435 const char *buf, size_t len) 436{ 437 return store_bridge_parm(d, buf, len, set_last_member_count); 438} 439static DEVICE_ATTR(multicast_last_member_count, S_IRUGO | S_IWUSR, 440 show_multicast_last_member_count, 441 store_multicast_last_member_count); 442 443static ssize_t show_multicast_startup_query_count( 444 struct device *d, struct device_attribute *attr, char *buf) 445{ 446 struct net_bridge *br = to_bridge(d); 447 return sprintf(buf, "%u\n", br->multicast_startup_query_count); 448} 449 450static int set_startup_query_count(struct net_bridge *br, unsigned long val) 451{ 452 br->multicast_startup_query_count = val; 453 return 0; 454} 455 456static ssize_t store_multicast_startup_query_count( 457 struct device *d, struct device_attribute *attr, const char *buf, 458 size_t len) 459{ 460 return store_bridge_parm(d, buf, len, set_startup_query_count); 461} 462static DEVICE_ATTR(multicast_startup_query_count, S_IRUGO | S_IWUSR, 463 show_multicast_startup_query_count, 464 store_multicast_startup_query_count); 465 466static ssize_t show_multicast_last_member_interval( 467 struct device *d, struct device_attribute *attr, char *buf) 468{ 469 struct net_bridge *br = to_bridge(d); 470 return sprintf(buf, "%lu\n", 471 jiffies_to_clock_t(br->multicast_last_member_interval)); 472} 473 474static int set_last_member_interval(struct net_bridge *br, unsigned long val) 475{ 476 br->multicast_last_member_interval = clock_t_to_jiffies(val); 477 return 0; 478} 479 480static ssize_t store_multicast_last_member_interval( 481 struct device *d, struct device_attribute *attr, const char *buf, 482 size_t len) 483{ 484 return store_bridge_parm(d, buf, len, set_last_member_interval); 485} 486static DEVICE_ATTR(multicast_last_member_interval, S_IRUGO | S_IWUSR, 487 show_multicast_last_member_interval, 488 store_multicast_last_member_interval); 489 490static ssize_t show_multicast_membership_interval( 491 struct device *d, struct device_attribute *attr, char *buf) 492{ 493 struct net_bridge *br = to_bridge(d); 494 return sprintf(buf, "%lu\n", 495 jiffies_to_clock_t(br->multicast_membership_interval)); 496} 497 498static int set_membership_interval(struct net_bridge *br, unsigned long val) 499{ 500 br->multicast_membership_interval = clock_t_to_jiffies(val); 501 return 0; 502} 503 504static ssize_t store_multicast_membership_interval( 505 struct device *d, struct device_attribute *attr, const char *buf, 506 size_t len) 507{ 508 return store_bridge_parm(d, buf, len, set_membership_interval); 509} 510static DEVICE_ATTR(multicast_membership_interval, S_IRUGO | S_IWUSR, 511 show_multicast_membership_interval, 512 store_multicast_membership_interval); 513 514static ssize_t show_multicast_querier_interval(struct device *d, 515 struct device_attribute *attr, 516 char *buf) 517{ 518 struct net_bridge *br = to_bridge(d); 519 return sprintf(buf, "%lu\n", 520 jiffies_to_clock_t(br->multicast_querier_interval)); 521} 522 523static int set_querier_interval(struct net_bridge *br, unsigned long val) 524{ 525 br->multicast_querier_interval = clock_t_to_jiffies(val); 526 return 0; 527} 528 529static ssize_t store_multicast_querier_interval(struct device *d, 530 struct device_attribute *attr, 531 const char *buf, size_t len) 532{ 533 return store_bridge_parm(d, buf, len, set_querier_interval); 534} 535static DEVICE_ATTR(multicast_querier_interval, S_IRUGO | S_IWUSR, 536 show_multicast_querier_interval, 537 store_multicast_querier_interval); 538 539static ssize_t show_multicast_query_interval(struct device *d, 540 struct device_attribute *attr, 541 char *buf) 542{ 543 struct net_bridge *br = to_bridge(d); 544 return sprintf(buf, "%lu\n", 545 jiffies_to_clock_t(br->multicast_query_interval)); 546} 547 548static int set_query_interval(struct net_bridge *br, unsigned long val) 549{ 550 br->multicast_query_interval = clock_t_to_jiffies(val); 551 return 0; 552} 553 554static ssize_t store_multicast_query_interval(struct device *d, 555 struct device_attribute *attr, 556 const char *buf, size_t len) 557{ 558 return store_bridge_parm(d, buf, len, set_query_interval); 559} 560static DEVICE_ATTR(multicast_query_interval, S_IRUGO | S_IWUSR, 561 show_multicast_query_interval, 562 store_multicast_query_interval); 563 564static ssize_t show_multicast_query_response_interval( 565 struct device *d, struct device_attribute *attr, char *buf) 566{ 567 struct net_bridge *br = to_bridge(d); 568 return sprintf( 569 buf, "%lu\n", 570 jiffies_to_clock_t(br->multicast_query_response_interval)); 571} 572 573static int set_query_response_interval(struct net_bridge *br, unsigned long val) 574{ 575 br->multicast_query_response_interval = clock_t_to_jiffies(val); 576 return 0; 577} 578 579static ssize_t store_multicast_query_response_interval( 580 struct device *d, struct device_attribute *attr, const char *buf, 581 size_t len) 582{ 583 return store_bridge_parm(d, buf, len, set_query_response_interval); 584} 585static DEVICE_ATTR(multicast_query_response_interval, S_IRUGO | S_IWUSR, 586 show_multicast_query_response_interval, 587 store_multicast_query_response_interval); 588 589static ssize_t show_multicast_startup_query_interval( 590 struct device *d, struct device_attribute *attr, char *buf) 591{ 592 struct net_bridge *br = to_bridge(d); 593 return sprintf( 594 buf, "%lu\n", 595 jiffies_to_clock_t(br->multicast_startup_query_interval)); 596} 597 598static int set_startup_query_interval(struct net_bridge *br, unsigned long val) 599{ 600 br->multicast_startup_query_interval = clock_t_to_jiffies(val); 601 return 0; 602} 603 604static ssize_t store_multicast_startup_query_interval( 605 struct device *d, struct device_attribute *attr, const char *buf, 606 size_t len) 607{ 608 return store_bridge_parm(d, buf, len, set_startup_query_interval); 609} 610static DEVICE_ATTR(multicast_startup_query_interval, S_IRUGO | S_IWUSR, 611 show_multicast_startup_query_interval, 612 store_multicast_startup_query_interval); 613#endif 614#ifdef CONFIG_BRIDGE_NETFILTER 615static ssize_t show_nf_call_iptables( 616 struct device *d, struct device_attribute *attr, char *buf) 617{ 618 struct net_bridge *br = to_bridge(d); 619 return sprintf(buf, "%u\n", br->nf_call_iptables); 620} 621 622static int set_nf_call_iptables(struct net_bridge *br, unsigned long val) 623{ 624 br->nf_call_iptables = val ? true : false; 625 return 0; 626} 627 628static ssize_t store_nf_call_iptables( 629 struct device *d, struct device_attribute *attr, const char *buf, 630 size_t len) 631{ 632 return store_bridge_parm(d, buf, len, set_nf_call_iptables); 633} 634static DEVICE_ATTR(nf_call_iptables, S_IRUGO | S_IWUSR, 635 show_nf_call_iptables, store_nf_call_iptables); 636 637static ssize_t show_nf_call_ip6tables( 638 struct device *d, struct device_attribute *attr, char *buf) 639{ 640 struct net_bridge *br = to_bridge(d); 641 return sprintf(buf, "%u\n", br->nf_call_ip6tables); 642} 643 644static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val) 645{ 646 br->nf_call_ip6tables = val ? true : false; 647 return 0; 648} 649 650static ssize_t store_nf_call_ip6tables( 651 struct device *d, struct device_attribute *attr, const char *buf, 652 size_t len) 653{ 654 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables); 655} 656static DEVICE_ATTR(nf_call_ip6tables, S_IRUGO | S_IWUSR, 657 show_nf_call_ip6tables, store_nf_call_ip6tables); 658 659static ssize_t show_nf_call_arptables( 660 struct device *d, struct device_attribute *attr, char *buf) 661{ 662 struct net_bridge *br = to_bridge(d); 663 return sprintf(buf, "%u\n", br->nf_call_arptables); 664} 665 666static int set_nf_call_arptables(struct net_bridge *br, unsigned long val) 667{ 668 br->nf_call_arptables = val ? true : false; 669 return 0; 670} 671 672static ssize_t store_nf_call_arptables( 673 struct device *d, struct device_attribute *attr, const char *buf, 674 size_t len) 675{ 676 return store_bridge_parm(d, buf, len, set_nf_call_arptables); 677} 678static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR, 679 show_nf_call_arptables, store_nf_call_arptables); 680#endif 681 682static struct attribute *bridge_attrs[] = { 683 &dev_attr_forward_delay.attr, 684 &dev_attr_hello_time.attr, 685 &dev_attr_max_age.attr, 686 &dev_attr_ageing_time.attr, 687 &dev_attr_stp_state.attr, 688 &dev_attr_priority.attr, 689 &dev_attr_bridge_id.attr, 690 &dev_attr_root_id.attr, 691 &dev_attr_root_path_cost.attr, 692 &dev_attr_root_port.attr, 693 &dev_attr_topology_change.attr, 694 &dev_attr_topology_change_detected.attr, 695 &dev_attr_hello_timer.attr, 696 &dev_attr_tcn_timer.attr, 697 &dev_attr_topology_change_timer.attr, 698 &dev_attr_gc_timer.attr, 699 &dev_attr_group_addr.attr, 700 &dev_attr_flush.attr, 701#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 702 &dev_attr_multicast_router.attr, 703 &dev_attr_multicast_snooping.attr, 704 &dev_attr_hash_elasticity.attr, 705 &dev_attr_hash_max.attr, 706 &dev_attr_multicast_last_member_count.attr, 707 &dev_attr_multicast_startup_query_count.attr, 708 &dev_attr_multicast_last_member_interval.attr, 709 &dev_attr_multicast_membership_interval.attr, 710 &dev_attr_multicast_querier_interval.attr, 711 &dev_attr_multicast_query_interval.attr, 712 &dev_attr_multicast_query_response_interval.attr, 713 &dev_attr_multicast_startup_query_interval.attr, 714#endif 715#ifdef CONFIG_BRIDGE_NETFILTER 716 &dev_attr_nf_call_iptables.attr, 717 &dev_attr_nf_call_ip6tables.attr, 718 &dev_attr_nf_call_arptables.attr, 719#endif 720 NULL 721}; 722 723static struct attribute_group bridge_group = { 724 .name = SYSFS_BRIDGE_ATTR, 725 .attrs = bridge_attrs, 726}; 727 728/* 729 * Export the forwarding information table as a binary file 730 * The records are struct __fdb_entry. 731 * 732 * Returns the number of bytes read. 733 */ 734static ssize_t brforward_read(struct file *filp, struct kobject *kobj, 735 struct bin_attribute *bin_attr, 736 char *buf, loff_t off, size_t count) 737{ 738 struct device *dev = to_dev(kobj); 739 struct net_bridge *br = to_bridge(dev); 740 int n; 741 742 /* must read whole records */ 743 if (off % sizeof(struct __fdb_entry) != 0) 744 return -EINVAL; 745 746 n = br_fdb_fillbuf(br, buf, 747 count / sizeof(struct __fdb_entry), 748 off / sizeof(struct __fdb_entry)); 749 750 if (n > 0) 751 n *= sizeof(struct __fdb_entry); 752 753 return n; 754} 755 756static struct bin_attribute bridge_forward = { 757 .attr = { .name = SYSFS_BRIDGE_FDB, 758 .mode = S_IRUGO, }, 759 .read = brforward_read, 760}; 761 762/* 763 * Add entries in sysfs onto the existing network class device 764 * for the bridge. 765 * Adds a attribute group "bridge" containing tuning parameters. 766 * Binary attribute containing the forward table 767 * Sub directory to hold links to interfaces. 768 * 769 * Note: the ifobj exists only to be a subdirectory 770 * to hold links. The ifobj exists in same data structure 771 * as it's parent the bridge so reference counting works. 772 */ 773int br_sysfs_addbr(struct net_device *dev) 774{ 775 struct kobject *brobj = &dev->dev.kobj; 776 struct net_bridge *br = netdev_priv(dev); 777 int err; 778 779 err = sysfs_create_group(brobj, &bridge_group); 780 if (err) { 781 pr_info("%s: can't create group %s/%s\n", 782 __func__, dev->name, bridge_group.name); 783 goto out1; 784 } 785 786 err = sysfs_create_bin_file(brobj, &bridge_forward); 787 if (err) { 788 pr_info("%s: can't create attribute file %s/%s\n", 789 __func__, dev->name, bridge_forward.attr.name); 790 goto out2; 791 } 792 793 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj); 794 if (!br->ifobj) { 795 pr_info("%s: can't add kobject (directory) %s/%s\n", 796 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR); 797 goto out3; 798 } 799 return 0; 800 out3: 801 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward); 802 out2: 803 sysfs_remove_group(&dev->dev.kobj, &bridge_group); 804 out1: 805 return err; 806 807} 808 809void br_sysfs_delbr(struct net_device *dev) 810{ 811 struct kobject *kobj = &dev->dev.kobj; 812 struct net_bridge *br = netdev_priv(dev); 813 814 kobject_put(br->ifobj); 815 sysfs_remove_bin_file(kobj, &bridge_forward); 816 sysfs_remove_group(kobj, &bridge_group); 817} 818