net/bridge/br_sysfs_br.c

   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  */
  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 (!capable(CAP_NET_ADMIN))
  40                 return -EPERM;
  41
  42         val = simple_strtoul(buf, &endp, 0);
  43         if (endp == buf)
  44                 return -EINVAL;
  45
  46         err = (*set)(br, val);
  47         return err ? err : len;
  48 }
  49
  50
  51 static ssize_t show_forward_delay(struct device *d,
  52                                   struct device_attribute *attr, char *buf)
  53 {
  54         struct net_bridge *br = to_bridge(d);
  55         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
  56 }
  57
  58 static ssize_t store_forward_delay(struct device *d,
  59                                    struct device_attribute *attr,
  60                                    const char *buf, size_t len)
  61 {
  62         return store_bridge_parm(d, buf, len, br_set_forward_delay);
  63 }
  64 static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
  65                    show_forward_delay, store_forward_delay);
  66
  67 static ssize_t show_hello_time(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 store_hello_time(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(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
  81                    store_hello_time);
  82
  83 static ssize_t show_max_age(struct device *d, struct device_attribute *attr,
  84                             char *buf)
  85 {
  86         return sprintf(buf, "%lu\n",
  87                        jiffies_to_clock_t(to_bridge(d)->max_age));
  88 }
  89
  90 static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
  91                              const char *buf, size_t len)
  92 {
  93         return store_bridge_parm(d, buf, len, br_set_max_age);
  94 }
  95 static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
  96
  97 static ssize_t show_ageing_time(struct device *d,
  98                                 struct device_attribute *attr, char *buf)
  99 {
 100         struct net_bridge *br = to_bridge(d);
 101         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 102 }
 103
 104 static int set_ageing_time(struct net_bridge *br, unsigned long val)
 105 {
 106         br->ageing_time = clock_t_to_jiffies(val);
 107         return 0;
 108 }
 109
 110 static ssize_t store_ageing_time(struct device *d,
 111                                  struct device_attribute *attr,
 112                                  const char *buf, size_t len)
 113 {
 114         return store_bridge_parm(d, buf, len, set_ageing_time);
 115 }
 116 static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
 117                    store_ageing_time);
 118
 119 static ssize_t show_stp_state(struct device *d,
 120                               struct device_attribute *attr, char *buf)
 121 {
 122         struct net_bridge *br = to_bridge(d);
 123         return sprintf(buf, "%d\n", br->stp_enabled);
 124 }
 125
 126
 127 static ssize_t store_stp_state(struct device *d,
 128                                struct device_attribute *attr, const char *buf,
 129                                size_t len)
 130 {
 131         struct net_bridge *br = to_bridge(d);
 132         char *endp;
 133         unsigned long val;
 134
 135         if (!capable(CAP_NET_ADMIN))
 136                 return -EPERM;
 137
 138         val = simple_strtoul(buf, &endp, 0);
 139         if (endp == buf)
 140                 return -EINVAL;
 141
 142         if (!rtnl_trylock())
 143                 return restart_syscall();
 144         br_stp_set_enabled(br, val);
 145         rtnl_unlock();
 146
 147         return len;
 148 }
 149 static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
 150                    store_stp_state);
 151
 152 static ssize_t show_priority(struct device *d, struct device_attribute *attr,
 153                              char *buf)
 154 {
 155         struct net_bridge *br = to_bridge(d);
 156         return sprintf(buf, "%d\n",
 157                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 158 }
 159
 160 static int set_priority(struct net_bridge *br, unsigned long val)
 161 {
 162         br_stp_set_bridge_priority(br, (u16) val);
 163         return 0;
 164 }
 165
 166 static ssize_t store_priority(struct device *d, struct device_attribute *attr,
 167                                const char *buf, size_t len)
 168 {
 169         return store_bridge_parm(d, buf, len, set_priority);
 170 }
 171 static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
 172
 173 static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
 174                             char *buf)
 175 {
 176         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 177 }
 178 static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
 179
 180 static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
 181                               char *buf)
 182 {
 183         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 184 }
 185 static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
 186
 187 static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
 188                               char *buf)
 189 {
 190         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 191 }
 192 static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
 193
 194 static ssize_t show_root_path_cost(struct device *d,
 195                                    struct device_attribute *attr, char *buf)
 196 {
 197         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 198 }
 199 static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
 200
 201 static ssize_t show_topology_change(struct device *d,
 202                                     struct device_attribute *attr, char *buf)
 203 {
 204         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 205 }
 206 static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
 207
 208 static ssize_t show_topology_change_detected(struct device *d,
 209                                              struct device_attribute *attr,
 210                                              char *buf)
 211 {
 212         struct net_bridge *br = to_bridge(d);
 213         return sprintf(buf, "%d\n", br->topology_change_detected);
 214 }
 215 static DEVICE_ATTR(topology_change_detected, S_IRUGO,
 216                    show_topology_change_detected, NULL);
 217
 218 static ssize_t show_hello_timer(struct device *d,
 219                                 struct device_attribute *attr, char *buf)
 220 {
 221         struct net_bridge *br = to_bridge(d);
 222         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 223 }
 224 static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
 225
 226 static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
 227                               char *buf)
 228 {
 229         struct net_bridge *br = to_bridge(d);
 230         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 231 }
 232 static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
 233
 234 static ssize_t show_topology_change_timer(struct device *d,
 235                                           struct device_attribute *attr,
 236                                           char *buf)
 237 {
 238         struct net_bridge *br = to_bridge(d);
 239         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 240 }
 241 static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
 242                    NULL);
 243
 244 static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
 245                              char *buf)
 246 {
 247         struct net_bridge *br = to_bridge(d);
 248         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
 249 }
 250 static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
 251
 252 static ssize_t show_group_addr(struct device *d,
 253                                struct device_attribute *attr, char *buf)
 254 {
 255         struct net_bridge *br = to_bridge(d);
 256         return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
 257                        br->group_addr[0], br->group_addr[1],
 258                        br->group_addr[2], br->group_addr[3],
 259                        br->group_addr[4], br->group_addr[5]);
 260 }
 261
 262 static ssize_t store_group_addr(struct device *d,
 263                                 struct device_attribute *attr,
 264                                 const char *buf, size_t len)
 265 {
 266         struct net_bridge *br = to_bridge(d);
 267         unsigned new_addr[6];
 268         int i;
 269
 270         if (!capable(CAP_NET_ADMIN))
 271                 return -EPERM;
 272
 273         if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
 274                    &new_addr[0], &new_addr[1], &new_addr[2],
 275                    &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
 276                 return -EINVAL;
 277
 278         /* Must be 01:80:c2:00:00:0X */
 279         for (i = 0; i < 5; i++)
 280                 if (new_addr[i] != br_group_address[i])
 281                         return -EINVAL;
 282
 283         if (new_addr[5] & ~0xf)
 284                 return -EINVAL;
 285
 286         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 287             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 288             new_addr[5] == 3)           /* 802.1X PAE address */
 289                 return -EINVAL;
 290
 291         spin_lock_bh(&br->lock);
 292         for (i = 0; i < 6; i++)
 293                 br->group_addr[i] = new_addr[i];
 294         spin_unlock_bh(&br->lock);
 295         return len;
 296 }
 297
 298 static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
 299                    show_group_addr, store_group_addr);
 300
 301 static ssize_t store_flush(struct device *d,
 302                            struct device_attribute *attr,
 303                            const char *buf, size_t len)
 304 {
 305         struct net_bridge *br = to_bridge(d);
 306
 307         if (!capable(CAP_NET_ADMIN))
 308                 return -EPERM;
 309
 310         br_fdb_flush(br);
 311         return len;
 312 }
 313 static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
 314
 315 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 316 static ssize_t show_multicast_router(struct device *d,
 317                                      struct device_attribute *attr, char *buf)
 318 {
 319         struct net_bridge *br = to_bridge(d);
 320         return sprintf(buf, "%d\n", br->multicast_router);
 321 }
 322
 323 static ssize_t store_multicast_router(struct device *d,
 324                                       struct device_attribute *attr,
 325                                       const char *buf, size_t len)
 326 {
 327         return store_bridge_parm(d, buf, len, br_multicast_set_router);
 328 }
 329 static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
 330                    store_multicast_router);
 331
 332 static ssize_t show_multicast_snooping(struct device *d,
 333                                        struct device_attribute *attr,
 334                                        char *buf)
 335 {
 336         struct net_bridge *br = to_bridge(d);
 337         return sprintf(buf, "%d\n", !br->multicast_disabled);
 338 }
 339
 340 static ssize_t store_multicast_snooping(struct device *d,
 341                                         struct device_attribute *attr,
 342                                         const char *buf, size_t len)
 343 {
 344         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 345 }
 346 static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR,
 347                    show_multicast_snooping, store_multicast_snooping);
 348
 349 static ssize_t show_hash_elasticity(struct device *d,
 350                                     struct device_attribute *attr, char *buf)
 351 {
 352         struct net_bridge *br = to_bridge(d);
 353         return sprintf(buf, "%u\n", br->hash_elasticity);
 354 }
 355
 356 static int set_elasticity(struct net_bridge *br, unsigned long val)
 357 {
 358         br->hash_elasticity = val;
 359         return 0;
 360 }
 361
 362 static ssize_t store_hash_elasticity(struct device *d,
 363                                      struct device_attribute *attr,
 364                                      const char *buf, size_t len)
 365 {
 366         return store_bridge_parm(d, buf, len, set_elasticity);
 367 }
 368 static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity,
 369                    store_hash_elasticity);
 370
 371 static ssize_t show_hash_max(struct device *d, struct device_attribute *attr,
 372                              char *buf)
 373 {
 374         struct net_bridge *br = to_bridge(d);
 375         return sprintf(buf, "%u\n", br->hash_max);
 376 }
 377
 378 static ssize_t store_hash_max(struct device *d, struct device_attribute *attr,
 379                               const char *buf, size_t len)
 380 {
 381         return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
 382 }
 383 static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max,
 384                    store_hash_max);
 385
 386 static ssize_t show_multicast_last_member_count(struct device *d,
 387                                                 struct device_attribute *attr,
 388                                                 char *buf)
 389 {
 390         struct net_bridge *br = to_bridge(d);
 391         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 392 }
 393
 394 static int set_last_member_count(struct net_bridge *br, unsigned long val)
 395 {
 396         br->multicast_last_member_count = val;
 397         return 0;
 398 }
 399
 400 static ssize_t store_multicast_last_member_count(struct device *d,
 401                                                  struct device_attribute *attr,
 402                                                  const char *buf, size_t len)
 403 {
 404         return store_bridge_parm(d, buf, len, set_last_member_count);
 405 }
 406 static DEVICE_ATTR(multicast_last_member_count, S_IRUGO | S_IWUSR,
 407                    show_multicast_last_member_count,
 408                    store_multicast_last_member_count);
 409
 410 static ssize_t show_multicast_startup_query_count(
 411         struct device *d, struct device_attribute *attr, char *buf)
 412 {
 413         struct net_bridge *br = to_bridge(d);
 414         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 415 }
 416
 417 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
 418 {
 419         br->multicast_startup_query_count = val;
 420         return 0;
 421 }
 422
 423 static ssize_t store_multicast_startup_query_count(
 424         struct device *d, struct device_attribute *attr, const char *buf,
 425         size_t len)
 426 {
 427         return store_bridge_parm(d, buf, len, set_startup_query_count);
 428 }
 429 static DEVICE_ATTR(multicast_startup_query_count, S_IRUGO | S_IWUSR,
 430                    show_multicast_startup_query_count,
 431                    store_multicast_startup_query_count);
 432
 433 static ssize_t show_multicast_last_member_interval(
 434         struct device *d, struct device_attribute *attr, char *buf)
 435 {
 436         struct net_bridge *br = to_bridge(d);
 437         return sprintf(buf, "%lu\n",
 438                        jiffies_to_clock_t(br->multicast_last_member_interval));
 439 }
 440
 441 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
 442 {
 443         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 444         return 0;
 445 }
 446
 447 static ssize_t store_multicast_last_member_interval(
 448         struct device *d, struct device_attribute *attr, const char *buf,
 449         size_t len)
 450 {
 451         return store_bridge_parm(d, buf, len, set_last_member_interval);
 452 }
 453 static DEVICE_ATTR(multicast_last_member_interval, S_IRUGO | S_IWUSR,
 454                    show_multicast_last_member_interval,
 455                    store_multicast_last_member_interval);
 456
 457 static ssize_t show_multicast_membership_interval(
 458         struct device *d, struct device_attribute *attr, char *buf)
 459 {
 460         struct net_bridge *br = to_bridge(d);
 461         return sprintf(buf, "%lu\n",
 462                        jiffies_to_clock_t(br->multicast_membership_interval));
 463 }
 464
 465 static int set_membership_interval(struct net_bridge *br, unsigned long val)
 466 {
 467         br->multicast_membership_interval = clock_t_to_jiffies(val);
 468         return 0;
 469 }
 470
 471 static ssize_t store_multicast_membership_interval(
 472         struct device *d, struct device_attribute *attr, const char *buf,
 473         size_t len)
 474 {
 475         return store_bridge_parm(d, buf, len, set_membership_interval);
 476 }
 477 static DEVICE_ATTR(multicast_membership_interval, S_IRUGO | S_IWUSR,
 478                    show_multicast_membership_interval,
 479                    store_multicast_membership_interval);
 480
 481 static ssize_t show_multicast_querier_interval(struct device *d,
 482                                                struct device_attribute *attr,
 483                                                char *buf)
 484 {
 485         struct net_bridge *br = to_bridge(d);
 486         return sprintf(buf, "%lu\n",
 487                        jiffies_to_clock_t(br->multicast_querier_interval));
 488 }
 489
 490 static int set_querier_interval(struct net_bridge *br, unsigned long val)
 491 {
 492         br->multicast_querier_interval = clock_t_to_jiffies(val);
 493         return 0;
 494 }
 495
 496 static ssize_t store_multicast_querier_interval(struct device *d,
 497                                                 struct device_attribute *attr,
 498                                                 const char *buf, size_t len)
 499 {
 500         return store_bridge_parm(d, buf, len, set_querier_interval);
 501 }
 502 static DEVICE_ATTR(multicast_querier_interval, S_IRUGO | S_IWUSR,
 503                    show_multicast_querier_interval,
 504                    store_multicast_querier_interval);
 505
 506 static ssize_t show_multicast_query_interval(struct device *d,
 507                                              struct device_attribute *attr,
 508                                              char *buf)
 509 {
 510         struct net_bridge *br = to_bridge(d);
 511         return sprintf(buf, "%lu\n",
 512                        jiffies_to_clock_t(br->multicast_query_interval));
 513 }
 514
 515 static int set_query_interval(struct net_bridge *br, unsigned long val)
 516 {
 517         br->multicast_query_interval = clock_t_to_jiffies(val);
 518         return 0;
 519 }
 520
 521 static ssize_t store_multicast_query_interval(struct device *d,
 522                                               struct device_attribute *attr,
 523                                               const char *buf, size_t len)
 524 {
 525         return store_bridge_parm(d, buf, len, set_query_interval);
 526 }
 527 static DEVICE_ATTR(multicast_query_interval, S_IRUGO | S_IWUSR,
 528                    show_multicast_query_interval,
 529                    store_multicast_query_interval);
 530
 531 static ssize_t show_multicast_query_response_interval(
 532         struct device *d, struct device_attribute *attr, char *buf)
 533 {
 534         struct net_bridge *br = to_bridge(d);
 535         return sprintf(
 536                 buf, "%lu\n",
 537                 jiffies_to_clock_t(br->multicast_query_response_interval));
 538 }
 539
 540 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
 541 {
 542         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 543         return 0;
 544 }
 545
 546 static ssize_t store_multicast_query_response_interval(
 547         struct device *d, struct device_attribute *attr, const char *buf,
 548         size_t len)
 549 {
 550         return store_bridge_parm(d, buf, len, set_query_response_interval);
 551 }
 552 static DEVICE_ATTR(multicast_query_response_interval, S_IRUGO | S_IWUSR,
 553                    show_multicast_query_response_interval,
 554                    store_multicast_query_response_interval);
 555
 556 static ssize_t show_multicast_startup_query_interval(
 557         struct device *d, struct device_attribute *attr, char *buf)
 558 {
 559         struct net_bridge *br = to_bridge(d);
 560         return sprintf(
 561                 buf, "%lu\n",
 562                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 563 }
 564
 565 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
 566 {
 567         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 568         return 0;
 569 }
 570
 571 static ssize_t store_multicast_startup_query_interval(
 572         struct device *d, struct device_attribute *attr, const char *buf,
 573         size_t len)
 574 {
 575         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 576 }
 577 static DEVICE_ATTR(multicast_startup_query_interval, S_IRUGO | S_IWUSR,
 578                    show_multicast_startup_query_interval,
 579                    store_multicast_startup_query_interval);
 580 #endif
 581 #ifdef CONFIG_BRIDGE_NETFILTER
 582 static ssize_t show_nf_call_iptables(
 583         struct device *d, struct device_attribute *attr, char *buf)
 584 {
 585         struct net_bridge *br = to_bridge(d);
 586         return sprintf(buf, "%u\n", br->nf_call_iptables);
 587 }
 588
 589 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
 590 {
 591         br->nf_call_iptables = val ? true : false;
 592         return 0;
 593 }
 594
 595 static ssize_t store_nf_call_iptables(
 596         struct device *d, struct device_attribute *attr, const char *buf,
 597         size_t len)
 598 {
 599         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 600 }
 601 static DEVICE_ATTR(nf_call_iptables, S_IRUGO | S_IWUSR,
 602                    show_nf_call_iptables, store_nf_call_iptables);
 603
 604 static ssize_t show_nf_call_ip6tables(
 605         struct device *d, struct device_attribute *attr, char *buf)
 606 {
 607         struct net_bridge *br = to_bridge(d);
 608         return sprintf(buf, "%u\n", br->nf_call_ip6tables);
 609 }
 610
 611 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
 612 {
 613         br->nf_call_ip6tables = val ? true : false;
 614         return 0;
 615 }
 616
 617 static ssize_t store_nf_call_ip6tables(
 618         struct device *d, struct device_attribute *attr, const char *buf,
 619         size_t len)
 620 {
 621         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 622 }
 623 static DEVICE_ATTR(nf_call_ip6tables, S_IRUGO | S_IWUSR,
 624                    show_nf_call_ip6tables, store_nf_call_ip6tables);
 625
 626 static ssize_t show_nf_call_arptables(
 627         struct device *d, struct device_attribute *attr, char *buf)
 628 {
 629         struct net_bridge *br = to_bridge(d);
 630         return sprintf(buf, "%u\n", br->nf_call_arptables);
 631 }
 632
 633 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
 634 {
 635         br->nf_call_arptables = val ? true : false;
 636         return 0;
 637 }
 638
 639 static ssize_t store_nf_call_arptables(
 640         struct device *d, struct device_attribute *attr, const char *buf,
 641         size_t len)
 642 {
 643         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 644 }
 645 static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR,
 646                    show_nf_call_arptables, store_nf_call_arptables);
 647 #endif
 648
 649 static struct attribute *bridge_attrs[] = {
 650         &dev_attr_forward_delay.attr,
 651         &dev_attr_hello_time.attr,
 652         &dev_attr_max_age.attr,
 653         &dev_attr_ageing_time.attr,
 654         &dev_attr_stp_state.attr,
 655         &dev_attr_priority.attr,
 656         &dev_attr_bridge_id.attr,
 657         &dev_attr_root_id.attr,
 658         &dev_attr_root_path_cost.attr,
 659         &dev_attr_root_port.attr,
 660         &dev_attr_topology_change.attr,
 661         &dev_attr_topology_change_detected.attr,
 662         &dev_attr_hello_timer.attr,
 663         &dev_attr_tcn_timer.attr,
 664         &dev_attr_topology_change_timer.attr,
 665         &dev_attr_gc_timer.attr,
 666         &dev_attr_group_addr.attr,
 667         &dev_attr_flush.attr,
 668 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 669         &dev_attr_multicast_router.attr,
 670         &dev_attr_multicast_snooping.attr,
 671         &dev_attr_hash_elasticity.attr,
 672         &dev_attr_hash_max.attr,
 673         &dev_attr_multicast_last_member_count.attr,
 674         &dev_attr_multicast_startup_query_count.attr,
 675         &dev_attr_multicast_last_member_interval.attr,
 676         &dev_attr_multicast_membership_interval.attr,
 677         &dev_attr_multicast_querier_interval.attr,
 678         &dev_attr_multicast_query_interval.attr,
 679         &dev_attr_multicast_query_response_interval.attr,
 680         &dev_attr_multicast_startup_query_interval.attr,
 681 #endif
 682 #ifdef CONFIG_BRIDGE_NETFILTER
 683         &dev_attr_nf_call_iptables.attr,
 684         &dev_attr_nf_call_ip6tables.attr,
 685         &dev_attr_nf_call_arptables.attr,
 686 #endif
 687         NULL
 688 };
 689
 690 static struct attribute_group bridge_group = {
 691         .name = SYSFS_BRIDGE_ATTR,
 692         .attrs = bridge_attrs,
 693 };
 694
 695 /*
 696  * Export the forwarding information table as a binary file
 697  * The records are struct __fdb_entry.
 698  *
 699  * Returns the number of bytes read.
 700  */
 701 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
 702                               struct bin_attribute *bin_attr,
 703                               char *buf, loff_t off, size_t count)
 704 {
 705         struct device *dev = to_dev(kobj);
 706         struct net_bridge *br = to_bridge(dev);
 707         int n;
 708
 709         /* must read whole records */
 710         if (off % sizeof(struct __fdb_entry) != 0)
 711                 return -EINVAL;
 712
 713         n =  br_fdb_fillbuf(br, buf,
 714                             count / sizeof(struct __fdb_entry),
 715                             off / sizeof(struct __fdb_entry));
 716
 717         if (n > 0)
 718                 n *= sizeof(struct __fdb_entry);
 719
 720         return n;
 721 }
 722
 723 static struct bin_attribute bridge_forward = {
 724         .attr = { .name = SYSFS_BRIDGE_FDB,
 725                   .mode = S_IRUGO, },
 726         .read = brforward_read,
 727 };
 728
 729 /*
 730  * Add entries in sysfs onto the existing network class device
 731  * for the bridge.
 732  *   Adds a attribute group "bridge" containing tuning parameters.
 733  *   Binary attribute containing the forward table
 734  *   Sub directory to hold links to interfaces.
 735  *
 736  * Note: the ifobj exists only to be a subdirectory
 737  *   to hold links.  The ifobj exists in same data structure
 738  *   as it's parent the bridge so reference counting works.
 739  */
 740 int br_sysfs_addbr(struct net_device *dev)
 741 {
 742         struct kobject *brobj = &dev->dev.kobj;
 743         struct net_bridge *br = netdev_priv(dev);
 744         int err;
 745
 746         err = sysfs_create_group(brobj, &bridge_group);
 747         if (err) {
 748                 pr_info("%s: can't create group %s/%s\n",
 749                         __func__, dev->name, bridge_group.name);
 750                 goto out1;
 751         }
 752
 753         err = sysfs_create_bin_file(brobj, &bridge_forward);
 754         if (err) {
 755                 pr_info("%s: can't create attribute file %s/%s\n",
 756                         __func__, dev->name, bridge_forward.attr.name);
 757                 goto out2;
 758         }
 759
 760         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
 761         if (!br->ifobj) {
 762                 pr_info("%s: can't add kobject (directory) %s/%s\n",
 763                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
 764                 goto out3;
 765         }
 766         return 0;
 767  out3:
 768         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
 769  out2:
 770         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
 771  out1:
 772         return err;
 773
 774 }
 775
 776 void br_sysfs_delbr(struct net_device *dev)
 777 {
 778         struct kobject *kobj = &dev->dev.kobj;
 779         struct net_bridge *br = netdev_priv(dev);
 780
 781         kobject_put(br->ifobj);
 782         sysfs_remove_bin_file(kobj, &bridge_forward);
 783         sysfs_remove_group(kobj, &bridge_group);
 784 }