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/etherdevice.h>
  18 #include <linux/if_bridge.h>
  19 #include <linux/rtnetlink.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/times.h>
  22
  23 #include "br_private.h"
  24
  25 #define to_dev(obj)     container_of(obj, struct device, kobj)
  26 #define to_bridge(cd)   ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
  27
  28 /*
  29  * Common code for storing bridge parameters.
  30  */
  31 static ssize_t store_bridge_parm(struct device *d,
  32                                  const char *buf, size_t len,
  33                                  int (*set)(struct net_bridge *, unsigned long))
  34 {
  35         struct net_bridge *br = to_bridge(d);
  36         char *endp;
  37         unsigned long val;
  38         int err;
  39
  40         if (!capable(CAP_NET_ADMIN))
  41                 return -EPERM;
  42
  43         val = simple_strtoul(buf, &endp, 0);
  44         if (endp == buf)
  45                 return -EINVAL;
  46
  47         err = (*set)(br, val);
  48         return err ? err : len;
  49 }
  50
  51
  52 static ssize_t show_forward_delay(struct device *d,
  53                                   struct device_attribute *attr, char *buf)
  54 {
  55         struct net_bridge *br = to_bridge(d);
  56         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
  57 }
  58
  59 static ssize_t store_forward_delay(struct device *d,
  60                                    struct device_attribute *attr,
  61                                    const char *buf, size_t len)
  62 {
  63         return store_bridge_parm(d, buf, len, br_set_forward_delay);
  64 }
  65 static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
  66                    show_forward_delay, store_forward_delay);
  67
  68 static ssize_t show_hello_time(struct device *d, struct device_attribute *attr,
  69                                char *buf)
  70 {
  71         return sprintf(buf, "%lu\n",
  72                        jiffies_to_clock_t(to_bridge(d)->hello_time));
  73 }
  74
  75 static ssize_t store_hello_time(struct device *d,
  76                                 struct device_attribute *attr, const char *buf,
  77                                 size_t len)
  78 {
  79         return store_bridge_parm(d, buf, len, br_set_hello_time);
  80 }
  81 static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
  82                    store_hello_time);
  83
  84 static ssize_t show_max_age(struct device *d, struct device_attribute *attr,
  85                             char *buf)
  86 {
  87         return sprintf(buf, "%lu\n",
  88                        jiffies_to_clock_t(to_bridge(d)->max_age));
  89 }
  90
  91 static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
  92                              const char *buf, size_t len)
  93 {
  94         return store_bridge_parm(d, buf, len, br_set_max_age);
  95 }
  96 static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
  97
  98 static ssize_t show_ageing_time(struct device *d,
  99                                 struct device_attribute *attr, char *buf)
 100 {
 101         struct net_bridge *br = to_bridge(d);
 102         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 103 }
 104
 105 static int set_ageing_time(struct net_bridge *br, unsigned long val)
 106 {
 107         br->ageing_time = clock_t_to_jiffies(val);
 108         return 0;
 109 }
 110
 111 static ssize_t store_ageing_time(struct device *d,
 112                                  struct device_attribute *attr,
 113                                  const char *buf, size_t len)
 114 {
 115         return store_bridge_parm(d, buf, len, set_ageing_time);
 116 }
 117 static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
 118                    store_ageing_time);
 119
 120 static ssize_t show_stp_state(struct device *d,
 121                               struct device_attribute *attr, char *buf)
 122 {
 123         struct net_bridge *br = to_bridge(d);
 124         return sprintf(buf, "%d\n", br->stp_enabled);
 125 }
 126
 127
 128 static ssize_t store_stp_state(struct device *d,
 129                                struct device_attribute *attr, const char *buf,
 130                                size_t len)
 131 {
 132         struct net_bridge *br = to_bridge(d);
 133         char *endp;
 134         unsigned long val;
 135
 136         if (!capable(CAP_NET_ADMIN))
 137                 return -EPERM;
 138
 139         val = simple_strtoul(buf, &endp, 0);
 140         if (endp == buf)
 141                 return -EINVAL;
 142
 143         if (!rtnl_trylock())
 144                 return restart_syscall();
 145         br_stp_set_enabled(br, val);
 146         rtnl_unlock();
 147
 148         return len;
 149 }
 150 static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
 151                    store_stp_state);
 152
 153 static ssize_t show_group_fwd_mask(struct device *d,
 154                               struct device_attribute *attr, char *buf)
 155 {
 156         struct net_bridge *br = to_bridge(d);
 157         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 158 }
 159
 160
 161 static ssize_t store_group_fwd_mask(struct device *d,
 162                                struct device_attribute *attr, const char *buf,
 163                                size_t len)
 164 {
 165         struct net_bridge *br = to_bridge(d);
 166         char *endp;
 167         unsigned long val;
 168
 169         if (!capable(CAP_NET_ADMIN))
 170                 return -EPERM;
 171
 172         val = simple_strtoul(buf, &endp, 0);
 173         if (endp == buf)
 174                 return -EINVAL;
 175
 176         if (val & BR_GROUPFWD_RESTRICTED)
 177                 return -EINVAL;
 178
 179         br->group_fwd_mask = val;
 180
 181         return len;
 182 }
 183 static DEVICE_ATTR(group_fwd_mask, S_IRUGO | S_IWUSR, show_group_fwd_mask,
 184                    store_group_fwd_mask);
 185
 186 static ssize_t show_priority(struct device *d, struct device_attribute *attr,
 187                              char *buf)
 188 {
 189         struct net_bridge *br = to_bridge(d);
 190         return sprintf(buf, "%d\n",
 191                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 192 }
 193
 194 static int set_priority(struct net_bridge *br, unsigned long val)
 195 {
 196         br_stp_set_bridge_priority(br, (u16) val);
 197         return 0;
 198 }
 199
 200 static ssize_t store_priority(struct device *d, struct device_attribute *attr,
 201                                const char *buf, size_t len)
 202 {
 203         return store_bridge_parm(d, buf, len, set_priority);
 204 }
 205 static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
 206
 207 static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
 208                             char *buf)
 209 {
 210         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 211 }
 212 static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
 213
 214 static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
 215                               char *buf)
 216 {
 217         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 218 }
 219 static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
 220
 221 static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
 222                               char *buf)
 223 {
 224         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 225 }
 226 static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
 227
 228 static ssize_t show_root_path_cost(struct device *d,
 229                                    struct device_attribute *attr, char *buf)
 230 {
 231         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 232 }
 233 static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
 234
 235 static ssize_t show_topology_change(struct device *d,
 236                                     struct device_attribute *attr, char *buf)
 237 {
 238         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 239 }
 240 static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
 241
 242 static ssize_t show_topology_change_detected(struct device *d,
 243                                              struct device_attribute *attr,
 244                                              char *buf)
 245 {
 246         struct net_bridge *br = to_bridge(d);
 247         return sprintf(buf, "%d\n", br->topology_change_detected);
 248 }
 249 static DEVICE_ATTR(topology_change_detected, S_IRUGO,
 250                    show_topology_change_detected, NULL);
 251
 252 static ssize_t show_hello_timer(struct device *d,
 253                                 struct device_attribute *attr, char *buf)
 254 {
 255         struct net_bridge *br = to_bridge(d);
 256         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 257 }
 258 static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
 259
 260 static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
 261                               char *buf)
 262 {
 263         struct net_bridge *br = to_bridge(d);
 264         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 265 }
 266 static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
 267
 268 static ssize_t show_topology_change_timer(struct device *d,
 269                                           struct device_attribute *attr,
 270                                           char *buf)
 271 {
 272         struct net_bridge *br = to_bridge(d);
 273         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 274 }
 275 static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
 276                    NULL);
 277
 278 static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
 279                              char *buf)
 280 {
 281         struct net_bridge *br = to_bridge(d);
 282         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
 283 }
 284 static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
 285
 286 static ssize_t show_group_addr(struct device *d,
 287                                struct device_attribute *attr, char *buf)
 288 {
 289         struct net_bridge *br = to_bridge(d);
 290         return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
 291                        br->group_addr[0], br->group_addr[1],
 292                        br->group_addr[2], br->group_addr[3],
 293                        br->group_addr[4], br->group_addr[5]);
 294 }
 295
 296 static ssize_t store_group_addr(struct device *d,
 297                                 struct device_attribute *attr,
 298                                 const char *buf, size_t len)
 299 {
 300         struct net_bridge *br = to_bridge(d);
 301         unsigned int new_addr[6];
 302         int i;
 303
 304         if (!capable(CAP_NET_ADMIN))
 305                 return -EPERM;
 306
 307         if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
 308                    &new_addr[0], &new_addr[1], &new_addr[2],
 309                    &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
 310                 return -EINVAL;
 311
 312         /* Must be 01:80:c2:00:00:0X */
 313         for (i = 0; i < 5; i++)
 314                 if (new_addr[i] != br_reserved_address[i])
 315                         return -EINVAL;
 316
 317         if (new_addr[5] & ~0xf)
 318                 return -EINVAL;
 319
 320         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 321             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 322             new_addr[5] == 3)           /* 802.1X PAE address */
 323                 return -EINVAL;
 324
 325         spin_lock_bh(&br->lock);
 326         for (i = 0; i < 6; i++)
 327                 br->group_addr[i] = new_addr[i];
 328         spin_unlock_bh(&br->lock);
 329         return len;
 330 }
 331
 332 static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
 333                    show_group_addr, store_group_addr);
 334
 335 static ssize_t store_flush(struct device *d,
 336                            struct device_attribute *attr,
 337                            const char *buf, size_t len)
 338 {
 339         struct net_bridge *br = to_bridge(d);
 340
 341         if (!capable(CAP_NET_ADMIN))
 342                 return -EPERM;
 343
 344         br_fdb_flush(br);
 345         return len;
 346 }
 347 static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
 348
 349 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 350 static ssize_t show_multicast_router(struct device *d,
 351                                      struct device_attribute *attr, char *buf)
 352 {
 353         struct net_bridge *br = to_bridge(d);
 354         return sprintf(buf, "%d\n", br->multicast_router);
 355 }
 356
 357 static ssize_t store_multicast_router(struct device *d,
 358                                       struct device_attribute *attr,
 359                                       const char *buf, size_t len)
 360 {
 361         return store_bridge_parm(d, buf, len, br_multicast_set_router);
 362 }
 363 static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
 364                    store_multicast_router);
 365
 366 static ssize_t show_multicast_snooping(struct device *d,
 367                                        struct device_attribute *attr,
 368                                        char *buf)
 369 {
 370         struct net_bridge *br = to_bridge(d);
 371         return sprintf(buf, "%d\n", !br->multicast_disabled);
 372 }
 373
 374 static ssize_t store_multicast_snooping(struct device *d,
 375                                         struct device_attribute *attr,
 376                                         const char *buf, size_t len)
 377 {
 378         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 379 }
 380 static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR,
 381                    show_multicast_snooping, store_multicast_snooping);
 382
 383 static ssize_t show_multicast_querier(struct device *d,
 384                                       struct device_attribute *attr,
 385                                       char *buf)
 386 {
 387         struct net_bridge *br = to_bridge(d);
 388         return sprintf(buf, "%d\n", br->multicast_querier);
 389 }
 390
 391 static ssize_t store_multicast_querier(struct device *d,
 392                                        struct device_attribute *attr,
 393                                        const char *buf, size_t len)
 394 {
 395         return store_bridge_parm(d, buf, len, br_multicast_set_querier);
 396 }
 397 static DEVICE_ATTR(multicast_querier, S_IRUGO | S_IWUSR,
 398                    show_multicast_querier, store_multicast_querier);
 399
 400 static ssize_t show_hash_elasticity(struct device *d,
 401                                     struct device_attribute *attr, char *buf)
 402 {
 403         struct net_bridge *br = to_bridge(d);
 404         return sprintf(buf, "%u\n", br->hash_elasticity);
 405 }
 406
 407 static int set_elasticity(struct net_bridge *br, unsigned long val)
 408 {
 409         br->hash_elasticity = val;
 410         return 0;
 411 }
 412
 413 static ssize_t store_hash_elasticity(struct device *d,
 414                                      struct device_attribute *attr,
 415                                      const char *buf, size_t len)
 416 {
 417         return store_bridge_parm(d, buf, len, set_elasticity);
 418 }
 419 static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity,
 420                    store_hash_elasticity);
 421
 422 static ssize_t show_hash_max(struct device *d, struct device_attribute *attr,
 423                              char *buf)
 424 {
 425         struct net_bridge *br = to_bridge(d);
 426         return sprintf(buf, "%u\n", br->hash_max);
 427 }
 428
 429 static ssize_t store_hash_max(struct device *d, struct device_attribute *attr,
 430                               const char *buf, size_t len)
 431 {
 432         return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
 433 }
 434 static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max,
 435                    store_hash_max);
 436
 437 static ssize_t show_multicast_last_member_count(struct device *d,
 438                                                 struct device_attribute *attr,
 439                                                 char *buf)
 440 {
 441         struct net_bridge *br = to_bridge(d);
 442         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 443 }
 444
 445 static int set_last_member_count(struct net_bridge *br, unsigned long val)
 446 {
 447         br->multicast_last_member_count = val;
 448         return 0;
 449 }
 450
 451 static ssize_t store_multicast_last_member_count(struct device *d,
 452                                                  struct device_attribute *attr,
 453                                                  const char *buf, size_t len)
 454 {
 455         return store_bridge_parm(d, buf, len, set_last_member_count);
 456 }
 457 static DEVICE_ATTR(multicast_last_member_count, S_IRUGO | S_IWUSR,
 458                    show_multicast_last_member_count,
 459                    store_multicast_last_member_count);
 460
 461 static ssize_t show_multicast_startup_query_count(
 462         struct device *d, struct device_attribute *attr, char *buf)
 463 {
 464         struct net_bridge *br = to_bridge(d);
 465         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 466 }
 467
 468 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
 469 {
 470         br->multicast_startup_query_count = val;
 471         return 0;
 472 }
 473
 474 static ssize_t store_multicast_startup_query_count(
 475         struct device *d, struct device_attribute *attr, const char *buf,
 476         size_t len)
 477 {
 478         return store_bridge_parm(d, buf, len, set_startup_query_count);
 479 }
 480 static DEVICE_ATTR(multicast_startup_query_count, S_IRUGO | S_IWUSR,
 481                    show_multicast_startup_query_count,
 482                    store_multicast_startup_query_count);
 483
 484 static ssize_t show_multicast_last_member_interval(
 485         struct device *d, struct device_attribute *attr, char *buf)
 486 {
 487         struct net_bridge *br = to_bridge(d);
 488         return sprintf(buf, "%lu\n",
 489                        jiffies_to_clock_t(br->multicast_last_member_interval));
 490 }
 491
 492 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
 493 {
 494         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 495         return 0;
 496 }
 497
 498 static ssize_t store_multicast_last_member_interval(
 499         struct device *d, struct device_attribute *attr, const char *buf,
 500         size_t len)
 501 {
 502         return store_bridge_parm(d, buf, len, set_last_member_interval);
 503 }
 504 static DEVICE_ATTR(multicast_last_member_interval, S_IRUGO | S_IWUSR,
 505                    show_multicast_last_member_interval,
 506                    store_multicast_last_member_interval);
 507
 508 static ssize_t show_multicast_membership_interval(
 509         struct device *d, struct device_attribute *attr, char *buf)
 510 {
 511         struct net_bridge *br = to_bridge(d);
 512         return sprintf(buf, "%lu\n",
 513                        jiffies_to_clock_t(br->multicast_membership_interval));
 514 }
 515
 516 static int set_membership_interval(struct net_bridge *br, unsigned long val)
 517 {
 518         br->multicast_membership_interval = clock_t_to_jiffies(val);
 519         return 0;
 520 }
 521
 522 static ssize_t store_multicast_membership_interval(
 523         struct device *d, struct device_attribute *attr, const char *buf,
 524         size_t len)
 525 {
 526         return store_bridge_parm(d, buf, len, set_membership_interval);
 527 }
 528 static DEVICE_ATTR(multicast_membership_interval, S_IRUGO | S_IWUSR,
 529                    show_multicast_membership_interval,
 530                    store_multicast_membership_interval);
 531
 532 static ssize_t show_multicast_querier_interval(struct device *d,
 533                                                struct device_attribute *attr,
 534                                                char *buf)
 535 {
 536         struct net_bridge *br = to_bridge(d);
 537         return sprintf(buf, "%lu\n",
 538                        jiffies_to_clock_t(br->multicast_querier_interval));
 539 }
 540
 541 static int set_querier_interval(struct net_bridge *br, unsigned long val)
 542 {
 543         br->multicast_querier_interval = clock_t_to_jiffies(val);
 544         return 0;
 545 }
 546
 547 static ssize_t store_multicast_querier_interval(struct device *d,
 548                                                 struct device_attribute *attr,
 549                                                 const char *buf, size_t len)
 550 {
 551         return store_bridge_parm(d, buf, len, set_querier_interval);
 552 }
 553 static DEVICE_ATTR(multicast_querier_interval, S_IRUGO | S_IWUSR,
 554                    show_multicast_querier_interval,
 555                    store_multicast_querier_interval);
 556
 557 static ssize_t show_multicast_query_interval(struct device *d,
 558                                              struct device_attribute *attr,
 559                                              char *buf)
 560 {
 561         struct net_bridge *br = to_bridge(d);
 562         return sprintf(buf, "%lu\n",
 563                        jiffies_to_clock_t(br->multicast_query_interval));
 564 }
 565
 566 static int set_query_interval(struct net_bridge *br, unsigned long val)
 567 {
 568         br->multicast_query_interval = clock_t_to_jiffies(val);
 569         return 0;
 570 }
 571
 572 static ssize_t store_multicast_query_interval(struct device *d,
 573                                               struct device_attribute *attr,
 574                                               const char *buf, size_t len)
 575 {
 576         return store_bridge_parm(d, buf, len, set_query_interval);
 577 }
 578 static DEVICE_ATTR(multicast_query_interval, S_IRUGO | S_IWUSR,
 579                    show_multicast_query_interval,
 580                    store_multicast_query_interval);
 581
 582 static ssize_t show_multicast_query_response_interval(
 583         struct device *d, struct device_attribute *attr, char *buf)
 584 {
 585         struct net_bridge *br = to_bridge(d);
 586         return sprintf(
 587                 buf, "%lu\n",
 588                 jiffies_to_clock_t(br->multicast_query_response_interval));
 589 }
 590
 591 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
 592 {
 593         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 594         return 0;
 595 }
 596
 597 static ssize_t store_multicast_query_response_interval(
 598         struct device *d, struct device_attribute *attr, const char *buf,
 599         size_t len)
 600 {
 601         return store_bridge_parm(d, buf, len, set_query_response_interval);
 602 }
 603 static DEVICE_ATTR(multicast_query_response_interval, S_IRUGO | S_IWUSR,
 604                    show_multicast_query_response_interval,
 605                    store_multicast_query_response_interval);
 606
 607 static ssize_t show_multicast_startup_query_interval(
 608         struct device *d, struct device_attribute *attr, char *buf)
 609 {
 610         struct net_bridge *br = to_bridge(d);
 611         return sprintf(
 612                 buf, "%lu\n",
 613                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 614 }
 615
 616 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
 617 {
 618         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 619         return 0;
 620 }
 621
 622 static ssize_t store_multicast_startup_query_interval(
 623         struct device *d, struct device_attribute *attr, const char *buf,
 624         size_t len)
 625 {
 626         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 627 }
 628 static DEVICE_ATTR(multicast_startup_query_interval, S_IRUGO | S_IWUSR,
 629                    show_multicast_startup_query_interval,
 630                    store_multicast_startup_query_interval);
 631 #endif
 632 #ifdef CONFIG_BRIDGE_NETFILTER
 633 static ssize_t show_nf_call_iptables(
 634         struct device *d, struct device_attribute *attr, char *buf)
 635 {
 636         struct net_bridge *br = to_bridge(d);
 637         return sprintf(buf, "%u\n", br->nf_call_iptables);
 638 }
 639
 640 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
 641 {
 642         br->nf_call_iptables = val ? true : false;
 643         return 0;
 644 }
 645
 646 static ssize_t store_nf_call_iptables(
 647         struct device *d, struct device_attribute *attr, const char *buf,
 648         size_t len)
 649 {
 650         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 651 }
 652 static DEVICE_ATTR(nf_call_iptables, S_IRUGO | S_IWUSR,
 653                    show_nf_call_iptables, store_nf_call_iptables);
 654
 655 static ssize_t show_nf_call_ip6tables(
 656         struct device *d, struct device_attribute *attr, char *buf)
 657 {
 658         struct net_bridge *br = to_bridge(d);
 659         return sprintf(buf, "%u\n", br->nf_call_ip6tables);
 660 }
 661
 662 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
 663 {
 664         br->nf_call_ip6tables = val ? true : false;
 665         return 0;
 666 }
 667
 668 static ssize_t store_nf_call_ip6tables(
 669         struct device *d, struct device_attribute *attr, const char *buf,
 670         size_t len)
 671 {
 672         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 673 }
 674 static DEVICE_ATTR(nf_call_ip6tables, S_IRUGO | S_IWUSR,
 675                    show_nf_call_ip6tables, store_nf_call_ip6tables);
 676
 677 static ssize_t show_nf_call_arptables(
 678         struct device *d, struct device_attribute *attr, char *buf)
 679 {
 680         struct net_bridge *br = to_bridge(d);
 681         return sprintf(buf, "%u\n", br->nf_call_arptables);
 682 }
 683
 684 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
 685 {
 686         br->nf_call_arptables = val ? true : false;
 687         return 0;
 688 }
 689
 690 static ssize_t store_nf_call_arptables(
 691         struct device *d, struct device_attribute *attr, const char *buf,
 692         size_t len)
 693 {
 694         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 695 }
 696 static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR,
 697                    show_nf_call_arptables, store_nf_call_arptables);
 698 #endif
 699
 700 static struct attribute *bridge_attrs[] = {
 701         &dev_attr_forward_delay.attr,
 702         &dev_attr_hello_time.attr,
 703         &dev_attr_max_age.attr,
 704         &dev_attr_ageing_time.attr,
 705         &dev_attr_stp_state.attr,
 706         &dev_attr_group_fwd_mask.attr,
 707         &dev_attr_priority.attr,
 708         &dev_attr_bridge_id.attr,
 709         &dev_attr_root_id.attr,
 710         &dev_attr_root_path_cost.attr,
 711         &dev_attr_root_port.attr,
 712         &dev_attr_topology_change.attr,
 713         &dev_attr_topology_change_detected.attr,
 714         &dev_attr_hello_timer.attr,
 715         &dev_attr_tcn_timer.attr,
 716         &dev_attr_topology_change_timer.attr,
 717         &dev_attr_gc_timer.attr,
 718         &dev_attr_group_addr.attr,
 719         &dev_attr_flush.attr,
 720 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 721         &dev_attr_multicast_router.attr,
 722         &dev_attr_multicast_snooping.attr,
 723         &dev_attr_multicast_querier.attr,
 724         &dev_attr_hash_elasticity.attr,
 725         &dev_attr_hash_max.attr,
 726         &dev_attr_multicast_last_member_count.attr,
 727         &dev_attr_multicast_startup_query_count.attr,
 728         &dev_attr_multicast_last_member_interval.attr,
 729         &dev_attr_multicast_membership_interval.attr,
 730         &dev_attr_multicast_querier_interval.attr,
 731         &dev_attr_multicast_query_interval.attr,
 732         &dev_attr_multicast_query_response_interval.attr,
 733         &dev_attr_multicast_startup_query_interval.attr,
 734 #endif
 735 #ifdef CONFIG_BRIDGE_NETFILTER
 736         &dev_attr_nf_call_iptables.attr,
 737         &dev_attr_nf_call_ip6tables.attr,
 738         &dev_attr_nf_call_arptables.attr,
 739 #endif
 740         NULL
 741 };
 742
 743 static struct attribute_group bridge_group = {
 744         .name = SYSFS_BRIDGE_ATTR,
 745         .attrs = bridge_attrs,
 746 };
 747
 748 /*
 749  * Export the forwarding information table as a binary file
 750  * The records are struct __fdb_entry.
 751  *
 752  * Returns the number of bytes read.
 753  */
 754 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
 755                               struct bin_attribute *bin_attr,
 756                               char *buf, loff_t off, size_t count)
 757 {
 758         struct device *dev = to_dev(kobj);
 759         struct net_bridge *br = to_bridge(dev);
 760         int n;
 761
 762         /* must read whole records */
 763         if (off % sizeof(struct __fdb_entry) != 0)
 764                 return -EINVAL;
 765
 766         n =  br_fdb_fillbuf(br, buf,
 767                             count / sizeof(struct __fdb_entry),
 768                             off / sizeof(struct __fdb_entry));
 769
 770         if (n > 0)
 771                 n *= sizeof(struct __fdb_entry);
 772
 773         return n;
 774 }
 775
 776 static struct bin_attribute bridge_forward = {
 777         .attr = { .name = SYSFS_BRIDGE_FDB,
 778                   .mode = S_IRUGO, },
 779         .read = brforward_read,
 780 };
 781
 782 /*
 783  * Add entries in sysfs onto the existing network class device
 784  * for the bridge.
 785  *   Adds a attribute group "bridge" containing tuning parameters.
 786  *   Binary attribute containing the forward table
 787  *   Sub directory to hold links to interfaces.
 788  *
 789  * Note: the ifobj exists only to be a subdirectory
 790  *   to hold links.  The ifobj exists in same data structure
 791  *   as it's parent the bridge so reference counting works.
 792  */
 793 int br_sysfs_addbr(struct net_device *dev)
 794 {
 795         struct kobject *brobj = &dev->dev.kobj;
 796         struct net_bridge *br = netdev_priv(dev);
 797         int err;
 798
 799         err = sysfs_create_group(brobj, &bridge_group);
 800         if (err) {
 801                 pr_info("%s: can't create group %s/%s\n",
 802                         __func__, dev->name, bridge_group.name);
 803                 goto out1;
 804         }
 805
 806         err = sysfs_create_bin_file(brobj, &bridge_forward);
 807         if (err) {
 808                 pr_info("%s: can't create attribute file %s/%s\n",
 809                         __func__, dev->name, bridge_forward.attr.name);
 810                 goto out2;
 811         }
 812
 813         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
 814         if (!br->ifobj) {
 815                 pr_info("%s: can't add kobject (directory) %s/%s\n",
 816                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
 817                 goto out3;
 818         }
 819         return 0;
 820  out3:
 821         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
 822  out2:
 823         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
 824  out1:
 825         return err;
 826
 827 }
 828
 829 void br_sysfs_delbr(struct net_device *dev)
 830 {
 831         struct kobject *kobj = &dev->dev.kobj;
 832         struct net_bridge *br = netdev_priv(dev);
 833
 834         kobject_put(br->ifobj);
 835         sysfs_remove_bin_file(kobj, &bridge_forward);
 836         sysfs_remove_group(kobj, &bridge_group);
 837 }