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_group_fwd_mask(struct device *d,
 153                               struct device_attribute *attr, char *buf)
 154 {
 155         struct net_bridge *br = to_bridge(d);
 156         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 157 }
 158
 159
 160 static ssize_t store_group_fwd_mask(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 (val & BR_GROUPFWD_RESTRICTED)
 176                 return -EINVAL;
 177
 178         br->group_fwd_mask = val;
 179
 180         return len;
 181 }
 182 static DEVICE_ATTR(group_fwd_mask, S_IRUGO | S_IWUSR, show_group_fwd_mask,
 183                    store_group_fwd_mask);
 184
 185 static 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
 193 static 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
 199 static 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 }
 204 static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
 205
 206 static 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 }
 211 static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
 212
 213 static 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 }
 218 static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
 219
 220 static 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 }
 225 static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
 226
 227 static 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 }
 232 static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
 233
 234 static 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 }
 239 static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
 240
 241 static 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 }
 248 static DEVICE_ATTR(topology_change_detected, S_IRUGO,
 249                    show_topology_change_detected, NULL);
 250
 251 static 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 }
 257 static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
 258
 259 static 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 }
 265 static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
 266
 267 static 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 }
 274 static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
 275                    NULL);
 276
 277 static 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 }
 283 static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
 284
 285 static 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
 295 static 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 int 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
 331 static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
 332                    show_group_addr, store_group_addr);
 333
 334 static 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 }
 346 static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
 347
 348 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 349 static 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
 356 static 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 }
 362 static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
 363                    store_multicast_router);
 364
 365 static 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
 373 static 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 }
 379 static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR,
 380                    show_multicast_snooping, store_multicast_snooping);
 381
 382 static ssize_t show_multicast_querier(struct device *d,
 383                                       struct device_attribute *attr,
 384                                       char *buf)
 385 {
 386         struct net_bridge *br = to_bridge(d);
 387         return sprintf(buf, "%d\n", br->multicast_querier);
 388 }
 389
 390 static ssize_t store_multicast_querier(struct device *d,
 391                                        struct device_attribute *attr,
 392                                        const char *buf, size_t len)
 393 {
 394         return store_bridge_parm(d, buf, len, br_multicast_set_querier);
 395 }
 396 static DEVICE_ATTR(multicast_querier, S_IRUGO | S_IWUSR,
 397                    show_multicast_querier, store_multicast_querier);
 398
 399 static ssize_t show_hash_elasticity(struct device *d,
 400                                     struct device_attribute *attr, char *buf)
 401 {
 402         struct net_bridge *br = to_bridge(d);
 403         return sprintf(buf, "%u\n", br->hash_elasticity);
 404 }
 405
 406 static int set_elasticity(struct net_bridge *br, unsigned long val)
 407 {
 408         br->hash_elasticity = val;
 409         return 0;
 410 }
 411
 412 static ssize_t store_hash_elasticity(struct device *d,
 413                                      struct device_attribute *attr,
 414                                      const char *buf, size_t len)
 415 {
 416         return store_bridge_parm(d, buf, len, set_elasticity);
 417 }
 418 static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity,
 419                    store_hash_elasticity);
 420
 421 static ssize_t show_hash_max(struct device *d, struct device_attribute *attr,
 422                              char *buf)
 423 {
 424         struct net_bridge *br = to_bridge(d);
 425         return sprintf(buf, "%u\n", br->hash_max);
 426 }
 427
 428 static ssize_t store_hash_max(struct device *d, struct device_attribute *attr,
 429                               const char *buf, size_t len)
 430 {
 431         return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
 432 }
 433 static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max,
 434                    store_hash_max);
 435
 436 static ssize_t show_multicast_last_member_count(struct device *d,
 437                                                 struct device_attribute *attr,
 438                                                 char *buf)
 439 {
 440         struct net_bridge *br = to_bridge(d);
 441         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 442 }
 443
 444 static int set_last_member_count(struct net_bridge *br, unsigned long val)
 445 {
 446         br->multicast_last_member_count = val;
 447         return 0;
 448 }
 449
 450 static ssize_t store_multicast_last_member_count(struct device *d,
 451                                                  struct device_attribute *attr,
 452                                                  const char *buf, size_t len)
 453 {
 454         return store_bridge_parm(d, buf, len, set_last_member_count);
 455 }
 456 static DEVICE_ATTR(multicast_last_member_count, S_IRUGO | S_IWUSR,
 457                    show_multicast_last_member_count,
 458                    store_multicast_last_member_count);
 459
 460 static ssize_t show_multicast_startup_query_count(
 461         struct device *d, struct device_attribute *attr, char *buf)
 462 {
 463         struct net_bridge *br = to_bridge(d);
 464         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 465 }
 466
 467 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
 468 {
 469         br->multicast_startup_query_count = val;
 470         return 0;
 471 }
 472
 473 static ssize_t store_multicast_startup_query_count(
 474         struct device *d, struct device_attribute *attr, const char *buf,
 475         size_t len)
 476 {
 477         return store_bridge_parm(d, buf, len, set_startup_query_count);
 478 }
 479 static DEVICE_ATTR(multicast_startup_query_count, S_IRUGO | S_IWUSR,
 480                    show_multicast_startup_query_count,
 481                    store_multicast_startup_query_count);
 482
 483 static ssize_t show_multicast_last_member_interval(
 484         struct device *d, struct device_attribute *attr, char *buf)
 485 {
 486         struct net_bridge *br = to_bridge(d);
 487         return sprintf(buf, "%lu\n",
 488                        jiffies_to_clock_t(br->multicast_last_member_interval));
 489 }
 490
 491 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
 492 {
 493         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 494         return 0;
 495 }
 496
 497 static ssize_t store_multicast_last_member_interval(
 498         struct device *d, struct device_attribute *attr, const char *buf,
 499         size_t len)
 500 {
 501         return store_bridge_parm(d, buf, len, set_last_member_interval);
 502 }
 503 static DEVICE_ATTR(multicast_last_member_interval, S_IRUGO | S_IWUSR,
 504                    show_multicast_last_member_interval,
 505                    store_multicast_last_member_interval);
 506
 507 static ssize_t show_multicast_membership_interval(
 508         struct device *d, struct device_attribute *attr, char *buf)
 509 {
 510         struct net_bridge *br = to_bridge(d);
 511         return sprintf(buf, "%lu\n",
 512                        jiffies_to_clock_t(br->multicast_membership_interval));
 513 }
 514
 515 static int set_membership_interval(struct net_bridge *br, unsigned long val)
 516 {
 517         br->multicast_membership_interval = clock_t_to_jiffies(val);
 518         return 0;
 519 }
 520
 521 static ssize_t store_multicast_membership_interval(
 522         struct device *d, struct device_attribute *attr, const char *buf,
 523         size_t len)
 524 {
 525         return store_bridge_parm(d, buf, len, set_membership_interval);
 526 }
 527 static DEVICE_ATTR(multicast_membership_interval, S_IRUGO | S_IWUSR,
 528                    show_multicast_membership_interval,
 529                    store_multicast_membership_interval);
 530
 531 static ssize_t show_multicast_querier_interval(struct device *d,
 532                                                struct device_attribute *attr,
 533                                                char *buf)
 534 {
 535         struct net_bridge *br = to_bridge(d);
 536         return sprintf(buf, "%lu\n",
 537                        jiffies_to_clock_t(br->multicast_querier_interval));
 538 }
 539
 540 static int set_querier_interval(struct net_bridge *br, unsigned long val)
 541 {
 542         br->multicast_querier_interval = clock_t_to_jiffies(val);
 543         return 0;
 544 }
 545
 546 static ssize_t store_multicast_querier_interval(struct device *d,
 547                                                 struct device_attribute *attr,
 548                                                 const char *buf, size_t len)
 549 {
 550         return store_bridge_parm(d, buf, len, set_querier_interval);
 551 }
 552 static DEVICE_ATTR(multicast_querier_interval, S_IRUGO | S_IWUSR,
 553                    show_multicast_querier_interval,
 554                    store_multicast_querier_interval);
 555
 556 static ssize_t show_multicast_query_interval(struct device *d,
 557                                              struct device_attribute *attr,
 558                                              char *buf)
 559 {
 560         struct net_bridge *br = to_bridge(d);
 561         return sprintf(buf, "%lu\n",
 562                        jiffies_to_clock_t(br->multicast_query_interval));
 563 }
 564
 565 static int set_query_interval(struct net_bridge *br, unsigned long val)
 566 {
 567         br->multicast_query_interval = clock_t_to_jiffies(val);
 568         return 0;
 569 }
 570
 571 static ssize_t store_multicast_query_interval(struct device *d,
 572                                               struct device_attribute *attr,
 573                                               const char *buf, size_t len)
 574 {
 575         return store_bridge_parm(d, buf, len, set_query_interval);
 576 }
 577 static DEVICE_ATTR(multicast_query_interval, S_IRUGO | S_IWUSR,
 578                    show_multicast_query_interval,
 579                    store_multicast_query_interval);
 580
 581 static ssize_t show_multicast_query_response_interval(
 582         struct device *d, struct device_attribute *attr, char *buf)
 583 {
 584         struct net_bridge *br = to_bridge(d);
 585         return sprintf(
 586                 buf, "%lu\n",
 587                 jiffies_to_clock_t(br->multicast_query_response_interval));
 588 }
 589
 590 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
 591 {
 592         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 593         return 0;
 594 }
 595
 596 static ssize_t store_multicast_query_response_interval(
 597         struct device *d, struct device_attribute *attr, const char *buf,
 598         size_t len)
 599 {
 600         return store_bridge_parm(d, buf, len, set_query_response_interval);
 601 }
 602 static DEVICE_ATTR(multicast_query_response_interval, S_IRUGO | S_IWUSR,
 603                    show_multicast_query_response_interval,
 604                    store_multicast_query_response_interval);
 605
 606 static ssize_t show_multicast_startup_query_interval(
 607         struct device *d, struct device_attribute *attr, char *buf)
 608 {
 609         struct net_bridge *br = to_bridge(d);
 610         return sprintf(
 611                 buf, "%lu\n",
 612                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 613 }
 614
 615 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
 616 {
 617         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 618         return 0;
 619 }
 620
 621 static ssize_t store_multicast_startup_query_interval(
 622         struct device *d, struct device_attribute *attr, const char *buf,
 623         size_t len)
 624 {
 625         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 626 }
 627 static DEVICE_ATTR(multicast_startup_query_interval, S_IRUGO | S_IWUSR,
 628                    show_multicast_startup_query_interval,
 629                    store_multicast_startup_query_interval);
 630 #endif
 631 #ifdef CONFIG_BRIDGE_NETFILTER
 632 static ssize_t show_nf_call_iptables(
 633         struct device *d, struct device_attribute *attr, char *buf)
 634 {
 635         struct net_bridge *br = to_bridge(d);
 636         return sprintf(buf, "%u\n", br->nf_call_iptables);
 637 }
 638
 639 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
 640 {
 641         br->nf_call_iptables = val ? true : false;
 642         return 0;
 643 }
 644
 645 static ssize_t store_nf_call_iptables(
 646         struct device *d, struct device_attribute *attr, const char *buf,
 647         size_t len)
 648 {
 649         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 650 }
 651 static DEVICE_ATTR(nf_call_iptables, S_IRUGO | S_IWUSR,
 652                    show_nf_call_iptables, store_nf_call_iptables);
 653
 654 static ssize_t show_nf_call_ip6tables(
 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 store_nf_call_ip6tables(
 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(nf_call_ip6tables, S_IRUGO | S_IWUSR,
 674                    show_nf_call_ip6tables, store_nf_call_ip6tables);
 675
 676 static ssize_t show_nf_call_arptables(
 677         struct device *d, struct device_attribute *attr, char *buf)
 678 {
 679         struct net_bridge *br = to_bridge(d);
 680         return sprintf(buf, "%u\n", br->nf_call_arptables);
 681 }
 682
 683 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
 684 {
 685         br->nf_call_arptables = val ? true : false;
 686         return 0;
 687 }
 688
 689 static ssize_t store_nf_call_arptables(
 690         struct device *d, struct device_attribute *attr, const char *buf,
 691         size_t len)
 692 {
 693         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 694 }
 695 static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR,
 696                    show_nf_call_arptables, store_nf_call_arptables);
 697 #endif
 698
 699 static struct attribute *bridge_attrs[] = {
 700         &dev_attr_forward_delay.attr,
 701         &dev_attr_hello_time.attr,
 702         &dev_attr_max_age.attr,
 703         &dev_attr_ageing_time.attr,
 704         &dev_attr_stp_state.attr,
 705         &dev_attr_group_fwd_mask.attr,
 706         &dev_attr_priority.attr,
 707         &dev_attr_bridge_id.attr,
 708         &dev_attr_root_id.attr,
 709         &dev_attr_root_path_cost.attr,
 710         &dev_attr_root_port.attr,
 711         &dev_attr_topology_change.attr,
 712         &dev_attr_topology_change_detected.attr,
 713         &dev_attr_hello_timer.attr,
 714         &dev_attr_tcn_timer.attr,
 715         &dev_attr_topology_change_timer.attr,
 716         &dev_attr_gc_timer.attr,
 717         &dev_attr_group_addr.attr,
 718         &dev_attr_flush.attr,
 719 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 720         &dev_attr_multicast_router.attr,
 721         &dev_attr_multicast_snooping.attr,
 722         &dev_attr_multicast_querier.attr,
 723         &dev_attr_hash_elasticity.attr,
 724         &dev_attr_hash_max.attr,
 725         &dev_attr_multicast_last_member_count.attr,
 726         &dev_attr_multicast_startup_query_count.attr,
 727         &dev_attr_multicast_last_member_interval.attr,
 728         &dev_attr_multicast_membership_interval.attr,
 729         &dev_attr_multicast_querier_interval.attr,
 730         &dev_attr_multicast_query_interval.attr,
 731         &dev_attr_multicast_query_response_interval.attr,
 732         &dev_attr_multicast_startup_query_interval.attr,
 733 #endif
 734 #ifdef CONFIG_BRIDGE_NETFILTER
 735         &dev_attr_nf_call_iptables.attr,
 736         &dev_attr_nf_call_ip6tables.attr,
 737         &dev_attr_nf_call_arptables.attr,
 738 #endif
 739         NULL
 740 };
 741
 742 static struct attribute_group bridge_group = {
 743         .name = SYSFS_BRIDGE_ATTR,
 744         .attrs = bridge_attrs,
 745 };
 746
 747 /*
 748  * Export the forwarding information table as a binary file
 749  * The records are struct __fdb_entry.
 750  *
 751  * Returns the number of bytes read.
 752  */
 753 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
 754                               struct bin_attribute *bin_attr,
 755                               char *buf, loff_t off, size_t count)
 756 {
 757         struct device *dev = to_dev(kobj);
 758         struct net_bridge *br = to_bridge(dev);
 759         int n;
 760
 761         /* must read whole records */
 762         if (off % sizeof(struct __fdb_entry) != 0)
 763                 return -EINVAL;
 764
 765         n =  br_fdb_fillbuf(br, buf,
 766                             count / sizeof(struct __fdb_entry),
 767                             off / sizeof(struct __fdb_entry));
 768
 769         if (n > 0)
 770                 n *= sizeof(struct __fdb_entry);
 771
 772         return n;
 773 }
 774
 775 static struct bin_attribute bridge_forward = {
 776         .attr = { .name = SYSFS_BRIDGE_FDB,
 777                   .mode = S_IRUGO, },
 778         .read = brforward_read,
 779 };
 780
 781 /*
 782  * Add entries in sysfs onto the existing network class device
 783  * for the bridge.
 784  *   Adds a attribute group "bridge" containing tuning parameters.
 785  *   Binary attribute containing the forward table
 786  *   Sub directory to hold links to interfaces.
 787  *
 788  * Note: the ifobj exists only to be a subdirectory
 789  *   to hold links.  The ifobj exists in same data structure
 790  *   as it's parent the bridge so reference counting works.
 791  */
 792 int br_sysfs_addbr(struct net_device *dev)
 793 {
 794         struct kobject *brobj = &dev->dev.kobj;
 795         struct net_bridge *br = netdev_priv(dev);
 796         int err;
 797
 798         err = sysfs_create_group(brobj, &bridge_group);
 799         if (err) {
 800                 pr_info("%s: can't create group %s/%s\n",
 801                         __func__, dev->name, bridge_group.name);
 802                 goto out1;
 803         }
 804
 805         err = sysfs_create_bin_file(brobj, &bridge_forward);
 806         if (err) {
 807                 pr_info("%s: can't create attribute file %s/%s\n",
 808                         __func__, dev->name, bridge_forward.attr.name);
 809                 goto out2;
 810         }
 811
 812         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
 813         if (!br->ifobj) {
 814                 pr_info("%s: can't add kobject (directory) %s/%s\n",
 815                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
 816                 goto out3;
 817         }
 818         return 0;
 819  out3:
 820         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
 821  out2:
 822         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
 823  out1:
 824         return err;
 825
 826 }
 827
 828 void br_sysfs_delbr(struct net_device *dev)
 829 {
 830         struct kobject *kobj = &dev->dev.kobj;
 831         struct net_bridge *br = netdev_priv(dev);
 832
 833         kobject_put(br->ifobj);
 834         sysfs_remove_bin_file(kobj, &bridge_forward);
 835         sysfs_remove_group(kobj, &bridge_group);
 836 }