net/bridge/br_sysfs_br.c

   1 /*
   2  *      Sysfs attributes of bridge
   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 (!ns_capable(dev_net(br->dev)->user_ns, 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 forward_delay_show(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 forward_delay_store(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_RW(forward_delay);
  66
  67 static ssize_t hello_time_show(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 hello_time_store(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_RW(hello_time);
  81
  82 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
  83                             char *buf)
  84 {
  85         return sprintf(buf, "%lu\n",
  86                        jiffies_to_clock_t(to_bridge(d)->max_age));
  87 }
  88
  89 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
  90                              const char *buf, size_t len)
  91 {
  92         return store_bridge_parm(d, buf, len, br_set_max_age);
  93 }
  94 static DEVICE_ATTR_RW(max_age);
  95
  96 static ssize_t ageing_time_show(struct device *d,
  97                                 struct device_attribute *attr, char *buf)
  98 {
  99         struct net_bridge *br = to_bridge(d);
 100         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
 101 }
 102
 103 static int set_ageing_time(struct net_bridge *br, unsigned long val)
 104 {
 105         int ret;
 106
 107         if (!rtnl_trylock())
 108                 return restart_syscall();
 109
 110         ret = br_set_ageing_time(br, val);
 111         rtnl_unlock();
 112
 113         return ret;
 114 }
 115
 116 static ssize_t ageing_time_store(struct device *d,
 117                                  struct device_attribute *attr,
 118                                  const char *buf, size_t len)
 119 {
 120         return store_bridge_parm(d, buf, len, set_ageing_time);
 121 }
 122 static DEVICE_ATTR_RW(ageing_time);
 123
 124 static ssize_t stp_state_show(struct device *d,
 125                               struct device_attribute *attr, char *buf)
 126 {
 127         struct net_bridge *br = to_bridge(d);
 128         return sprintf(buf, "%d\n", br->stp_enabled);
 129 }
 130
 131
 132 static ssize_t stp_state_store(struct device *d,
 133                                struct device_attribute *attr, const char *buf,
 134                                size_t len)
 135 {
 136         struct net_bridge *br = to_bridge(d);
 137         char *endp;
 138         unsigned long val;
 139
 140         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 141                 return -EPERM;
 142
 143         val = simple_strtoul(buf, &endp, 0);
 144         if (endp == buf)
 145                 return -EINVAL;
 146
 147         if (!rtnl_trylock())
 148                 return restart_syscall();
 149         br_stp_set_enabled(br, val);
 150         rtnl_unlock();
 151
 152         return len;
 153 }
 154 static DEVICE_ATTR_RW(stp_state);
 155
 156 static ssize_t group_fwd_mask_show(struct device *d,
 157                                    struct device_attribute *attr,
 158                                    char *buf)
 159 {
 160         struct net_bridge *br = to_bridge(d);
 161         return sprintf(buf, "%#x\n", br->group_fwd_mask);
 162 }
 163
 164
 165 static ssize_t group_fwd_mask_store(struct device *d,
 166                                     struct device_attribute *attr,
 167                                     const char *buf,
 168                                     size_t len)
 169 {
 170         struct net_bridge *br = to_bridge(d);
 171         char *endp;
 172         unsigned long val;
 173
 174         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 175                 return -EPERM;
 176
 177         val = simple_strtoul(buf, &endp, 0);
 178         if (endp == buf)
 179                 return -EINVAL;
 180
 181         if (val & BR_GROUPFWD_RESTRICTED)
 182                 return -EINVAL;
 183
 184         br->group_fwd_mask = val;
 185
 186         return len;
 187 }
 188 static DEVICE_ATTR_RW(group_fwd_mask);
 189
 190 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
 191                              char *buf)
 192 {
 193         struct net_bridge *br = to_bridge(d);
 194         return sprintf(buf, "%d\n",
 195                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
 196 }
 197
 198 static int set_priority(struct net_bridge *br, unsigned long val)
 199 {
 200         br_stp_set_bridge_priority(br, (u16) val);
 201         return 0;
 202 }
 203
 204 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
 205                               const char *buf, size_t len)
 206 {
 207         return store_bridge_parm(d, buf, len, set_priority);
 208 }
 209 static DEVICE_ATTR_RW(priority);
 210
 211 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
 212                             char *buf)
 213 {
 214         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
 215 }
 216 static DEVICE_ATTR_RO(root_id);
 217
 218 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
 219                               char *buf)
 220 {
 221         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
 222 }
 223 static DEVICE_ATTR_RO(bridge_id);
 224
 225 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
 226                               char *buf)
 227 {
 228         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
 229 }
 230 static DEVICE_ATTR_RO(root_port);
 231
 232 static ssize_t root_path_cost_show(struct device *d,
 233                                    struct device_attribute *attr, char *buf)
 234 {
 235         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
 236 }
 237 static DEVICE_ATTR_RO(root_path_cost);
 238
 239 static ssize_t topology_change_show(struct device *d,
 240                                     struct device_attribute *attr, char *buf)
 241 {
 242         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
 243 }
 244 static DEVICE_ATTR_RO(topology_change);
 245
 246 static ssize_t topology_change_detected_show(struct device *d,
 247                                              struct device_attribute *attr,
 248                                              char *buf)
 249 {
 250         struct net_bridge *br = to_bridge(d);
 251         return sprintf(buf, "%d\n", br->topology_change_detected);
 252 }
 253 static DEVICE_ATTR_RO(topology_change_detected);
 254
 255 static ssize_t hello_timer_show(struct device *d,
 256                                 struct device_attribute *attr, char *buf)
 257 {
 258         struct net_bridge *br = to_bridge(d);
 259         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
 260 }
 261 static DEVICE_ATTR_RO(hello_timer);
 262
 263 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
 264                               char *buf)
 265 {
 266         struct net_bridge *br = to_bridge(d);
 267         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
 268 }
 269 static DEVICE_ATTR_RO(tcn_timer);
 270
 271 static ssize_t topology_change_timer_show(struct device *d,
 272                                           struct device_attribute *attr,
 273                                           char *buf)
 274 {
 275         struct net_bridge *br = to_bridge(d);
 276         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
 277 }
 278 static DEVICE_ATTR_RO(topology_change_timer);
 279
 280 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
 281                              char *buf)
 282 {
 283         struct net_bridge *br = to_bridge(d);
 284         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
 285 }
 286 static DEVICE_ATTR_RO(gc_timer);
 287
 288 static ssize_t group_addr_show(struct device *d,
 289                                struct device_attribute *attr, char *buf)
 290 {
 291         struct net_bridge *br = to_bridge(d);
 292         return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
 293                        br->group_addr[0], br->group_addr[1],
 294                        br->group_addr[2], br->group_addr[3],
 295                        br->group_addr[4], br->group_addr[5]);
 296 }
 297
 298 static ssize_t group_addr_store(struct device *d,
 299                                 struct device_attribute *attr,
 300                                 const char *buf, size_t len)
 301 {
 302         struct net_bridge *br = to_bridge(d);
 303         u8 new_addr[6];
 304         int i;
 305
 306         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 307                 return -EPERM;
 308
 309         if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
 310                    &new_addr[0], &new_addr[1], &new_addr[2],
 311                    &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
 312                 return -EINVAL;
 313
 314         if (!is_link_local_ether_addr(new_addr))
 315                 return -EINVAL;
 316
 317         if (new_addr[5] == 1 ||         /* 802.3x Pause address */
 318             new_addr[5] == 2 ||         /* 802.3ad Slow protocols */
 319             new_addr[5] == 3)           /* 802.1X PAE address */
 320                 return -EINVAL;
 321
 322         if (!rtnl_trylock())
 323                 return restart_syscall();
 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
 330         br->group_addr_set = true;
 331         br_recalculate_fwd_mask(br);
 332
 333         rtnl_unlock();
 334
 335         return len;
 336 }
 337
 338 static DEVICE_ATTR_RW(group_addr);
 339
 340 static ssize_t flush_store(struct device *d,
 341                            struct device_attribute *attr,
 342                            const char *buf, size_t len)
 343 {
 344         struct net_bridge *br = to_bridge(d);
 345
 346         if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
 347                 return -EPERM;
 348
 349         br_fdb_flush(br);
 350         return len;
 351 }
 352 static DEVICE_ATTR_WO(flush);
 353
 354 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 355 static ssize_t multicast_router_show(struct device *d,
 356                                      struct device_attribute *attr, char *buf)
 357 {
 358         struct net_bridge *br = to_bridge(d);
 359         return sprintf(buf, "%d\n", br->multicast_router);
 360 }
 361
 362 static ssize_t multicast_router_store(struct device *d,
 363                                       struct device_attribute *attr,
 364                                       const char *buf, size_t len)
 365 {
 366         return store_bridge_parm(d, buf, len, br_multicast_set_router);
 367 }
 368 static DEVICE_ATTR_RW(multicast_router);
 369
 370 static ssize_t multicast_snooping_show(struct device *d,
 371                                        struct device_attribute *attr,
 372                                        char *buf)
 373 {
 374         struct net_bridge *br = to_bridge(d);
 375         return sprintf(buf, "%d\n", !br->multicast_disabled);
 376 }
 377
 378 static ssize_t multicast_snooping_store(struct device *d,
 379                                         struct device_attribute *attr,
 380                                         const char *buf, size_t len)
 381 {
 382         return store_bridge_parm(d, buf, len, br_multicast_toggle);
 383 }
 384 static DEVICE_ATTR_RW(multicast_snooping);
 385
 386 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
 387                                                struct device_attribute *attr,
 388                                                char *buf)
 389 {
 390         struct net_bridge *br = to_bridge(d);
 391         return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr);
 392 }
 393
 394 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
 395 {
 396         br->multicast_query_use_ifaddr = !!val;
 397         return 0;
 398 }
 399
 400 static ssize_t
 401 multicast_query_use_ifaddr_store(struct device *d,
 402                                  struct device_attribute *attr,
 403                                  const char *buf, size_t len)
 404 {
 405         return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
 406 }
 407 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
 408
 409 static ssize_t multicast_querier_show(struct device *d,
 410                                       struct device_attribute *attr,
 411                                       char *buf)
 412 {
 413         struct net_bridge *br = to_bridge(d);
 414         return sprintf(buf, "%d\n", br->multicast_querier);
 415 }
 416
 417 static ssize_t multicast_querier_store(struct device *d,
 418                                        struct device_attribute *attr,
 419                                        const char *buf, size_t len)
 420 {
 421         return store_bridge_parm(d, buf, len, br_multicast_set_querier);
 422 }
 423 static DEVICE_ATTR_RW(multicast_querier);
 424
 425 static ssize_t hash_elasticity_show(struct device *d,
 426                                     struct device_attribute *attr, char *buf)
 427 {
 428         struct net_bridge *br = to_bridge(d);
 429         return sprintf(buf, "%u\n", br->hash_elasticity);
 430 }
 431
 432 static int set_elasticity(struct net_bridge *br, unsigned long val)
 433 {
 434         br->hash_elasticity = val;
 435         return 0;
 436 }
 437
 438 static ssize_t hash_elasticity_store(struct device *d,
 439                                      struct device_attribute *attr,
 440                                      const char *buf, size_t len)
 441 {
 442         return store_bridge_parm(d, buf, len, set_elasticity);
 443 }
 444 static DEVICE_ATTR_RW(hash_elasticity);
 445
 446 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
 447                              char *buf)
 448 {
 449         struct net_bridge *br = to_bridge(d);
 450         return sprintf(buf, "%u\n", br->hash_max);
 451 }
 452
 453 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
 454                               const char *buf, size_t len)
 455 {
 456         return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
 457 }
 458 static DEVICE_ATTR_RW(hash_max);
 459
 460 static ssize_t multicast_last_member_count_show(struct device *d,
 461                                                 struct device_attribute *attr,
 462                                                 char *buf)
 463 {
 464         struct net_bridge *br = to_bridge(d);
 465         return sprintf(buf, "%u\n", br->multicast_last_member_count);
 466 }
 467
 468 static int set_last_member_count(struct net_bridge *br, unsigned long val)
 469 {
 470         br->multicast_last_member_count = val;
 471         return 0;
 472 }
 473
 474 static ssize_t multicast_last_member_count_store(struct device *d,
 475                                                  struct device_attribute *attr,
 476                                                  const char *buf, size_t len)
 477 {
 478         return store_bridge_parm(d, buf, len, set_last_member_count);
 479 }
 480 static DEVICE_ATTR_RW(multicast_last_member_count);
 481
 482 static ssize_t multicast_startup_query_count_show(
 483         struct device *d, struct device_attribute *attr, char *buf)
 484 {
 485         struct net_bridge *br = to_bridge(d);
 486         return sprintf(buf, "%u\n", br->multicast_startup_query_count);
 487 }
 488
 489 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
 490 {
 491         br->multicast_startup_query_count = val;
 492         return 0;
 493 }
 494
 495 static ssize_t multicast_startup_query_count_store(
 496         struct device *d, struct device_attribute *attr, const char *buf,
 497         size_t len)
 498 {
 499         return store_bridge_parm(d, buf, len, set_startup_query_count);
 500 }
 501 static DEVICE_ATTR_RW(multicast_startup_query_count);
 502
 503 static ssize_t multicast_last_member_interval_show(
 504         struct device *d, struct device_attribute *attr, char *buf)
 505 {
 506         struct net_bridge *br = to_bridge(d);
 507         return sprintf(buf, "%lu\n",
 508                        jiffies_to_clock_t(br->multicast_last_member_interval));
 509 }
 510
 511 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
 512 {
 513         br->multicast_last_member_interval = clock_t_to_jiffies(val);
 514         return 0;
 515 }
 516
 517 static ssize_t multicast_last_member_interval_store(
 518         struct device *d, struct device_attribute *attr, const char *buf,
 519         size_t len)
 520 {
 521         return store_bridge_parm(d, buf, len, set_last_member_interval);
 522 }
 523 static DEVICE_ATTR_RW(multicast_last_member_interval);
 524
 525 static ssize_t multicast_membership_interval_show(
 526         struct device *d, struct device_attribute *attr, char *buf)
 527 {
 528         struct net_bridge *br = to_bridge(d);
 529         return sprintf(buf, "%lu\n",
 530                        jiffies_to_clock_t(br->multicast_membership_interval));
 531 }
 532
 533 static int set_membership_interval(struct net_bridge *br, unsigned long val)
 534 {
 535         br->multicast_membership_interval = clock_t_to_jiffies(val);
 536         return 0;
 537 }
 538
 539 static ssize_t multicast_membership_interval_store(
 540         struct device *d, struct device_attribute *attr, const char *buf,
 541         size_t len)
 542 {
 543         return store_bridge_parm(d, buf, len, set_membership_interval);
 544 }
 545 static DEVICE_ATTR_RW(multicast_membership_interval);
 546
 547 static ssize_t multicast_querier_interval_show(struct device *d,
 548                                                struct device_attribute *attr,
 549                                                char *buf)
 550 {
 551         struct net_bridge *br = to_bridge(d);
 552         return sprintf(buf, "%lu\n",
 553                        jiffies_to_clock_t(br->multicast_querier_interval));
 554 }
 555
 556 static int set_querier_interval(struct net_bridge *br, unsigned long val)
 557 {
 558         br->multicast_querier_interval = clock_t_to_jiffies(val);
 559         return 0;
 560 }
 561
 562 static ssize_t multicast_querier_interval_store(struct device *d,
 563                                                 struct device_attribute *attr,
 564                                                 const char *buf, size_t len)
 565 {
 566         return store_bridge_parm(d, buf, len, set_querier_interval);
 567 }
 568 static DEVICE_ATTR_RW(multicast_querier_interval);
 569
 570 static ssize_t multicast_query_interval_show(struct device *d,
 571                                              struct device_attribute *attr,
 572                                              char *buf)
 573 {
 574         struct net_bridge *br = to_bridge(d);
 575         return sprintf(buf, "%lu\n",
 576                        jiffies_to_clock_t(br->multicast_query_interval));
 577 }
 578
 579 static int set_query_interval(struct net_bridge *br, unsigned long val)
 580 {
 581         br->multicast_query_interval = clock_t_to_jiffies(val);
 582         return 0;
 583 }
 584
 585 static ssize_t multicast_query_interval_store(struct device *d,
 586                                               struct device_attribute *attr,
 587                                               const char *buf, size_t len)
 588 {
 589         return store_bridge_parm(d, buf, len, set_query_interval);
 590 }
 591 static DEVICE_ATTR_RW(multicast_query_interval);
 592
 593 static ssize_t multicast_query_response_interval_show(
 594         struct device *d, struct device_attribute *attr, char *buf)
 595 {
 596         struct net_bridge *br = to_bridge(d);
 597         return sprintf(
 598                 buf, "%lu\n",
 599                 jiffies_to_clock_t(br->multicast_query_response_interval));
 600 }
 601
 602 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
 603 {
 604         br->multicast_query_response_interval = clock_t_to_jiffies(val);
 605         return 0;
 606 }
 607
 608 static ssize_t multicast_query_response_interval_store(
 609         struct device *d, struct device_attribute *attr, const char *buf,
 610         size_t len)
 611 {
 612         return store_bridge_parm(d, buf, len, set_query_response_interval);
 613 }
 614 static DEVICE_ATTR_RW(multicast_query_response_interval);
 615
 616 static ssize_t multicast_startup_query_interval_show(
 617         struct device *d, struct device_attribute *attr, char *buf)
 618 {
 619         struct net_bridge *br = to_bridge(d);
 620         return sprintf(
 621                 buf, "%lu\n",
 622                 jiffies_to_clock_t(br->multicast_startup_query_interval));
 623 }
 624
 625 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
 626 {
 627         br->multicast_startup_query_interval = clock_t_to_jiffies(val);
 628         return 0;
 629 }
 630
 631 static ssize_t multicast_startup_query_interval_store(
 632         struct device *d, struct device_attribute *attr, const char *buf,
 633         size_t len)
 634 {
 635         return store_bridge_parm(d, buf, len, set_startup_query_interval);
 636 }
 637 static DEVICE_ATTR_RW(multicast_startup_query_interval);
 638 #endif
 639 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 640 static ssize_t nf_call_iptables_show(
 641         struct device *d, struct device_attribute *attr, char *buf)
 642 {
 643         struct net_bridge *br = to_bridge(d);
 644         return sprintf(buf, "%u\n", br->nf_call_iptables);
 645 }
 646
 647 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
 648 {
 649         br->nf_call_iptables = val ? true : false;
 650         return 0;
 651 }
 652
 653 static ssize_t nf_call_iptables_store(
 654         struct device *d, struct device_attribute *attr, const char *buf,
 655         size_t len)
 656 {
 657         return store_bridge_parm(d, buf, len, set_nf_call_iptables);
 658 }
 659 static DEVICE_ATTR_RW(nf_call_iptables);
 660
 661 static ssize_t nf_call_ip6tables_show(
 662         struct device *d, struct device_attribute *attr, char *buf)
 663 {
 664         struct net_bridge *br = to_bridge(d);
 665         return sprintf(buf, "%u\n", br->nf_call_ip6tables);
 666 }
 667
 668 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
 669 {
 670         br->nf_call_ip6tables = val ? true : false;
 671         return 0;
 672 }
 673
 674 static ssize_t nf_call_ip6tables_store(
 675         struct device *d, struct device_attribute *attr, const char *buf,
 676         size_t len)
 677 {
 678         return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
 679 }
 680 static DEVICE_ATTR_RW(nf_call_ip6tables);
 681
 682 static ssize_t nf_call_arptables_show(
 683         struct device *d, struct device_attribute *attr, char *buf)
 684 {
 685         struct net_bridge *br = to_bridge(d);
 686         return sprintf(buf, "%u\n", br->nf_call_arptables);
 687 }
 688
 689 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
 690 {
 691         br->nf_call_arptables = val ? true : false;
 692         return 0;
 693 }
 694
 695 static ssize_t nf_call_arptables_store(
 696         struct device *d, struct device_attribute *attr, const char *buf,
 697         size_t len)
 698 {
 699         return store_bridge_parm(d, buf, len, set_nf_call_arptables);
 700 }
 701 static DEVICE_ATTR_RW(nf_call_arptables);
 702 #endif
 703 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 704 static ssize_t vlan_filtering_show(struct device *d,
 705                                    struct device_attribute *attr,
 706                                    char *buf)
 707 {
 708         struct net_bridge *br = to_bridge(d);
 709         return sprintf(buf, "%d\n", br->vlan_enabled);
 710 }
 711
 712 static ssize_t vlan_filtering_store(struct device *d,
 713                                     struct device_attribute *attr,
 714                                     const char *buf, size_t len)
 715 {
 716         return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
 717 }
 718 static DEVICE_ATTR_RW(vlan_filtering);
 719
 720 static ssize_t vlan_protocol_show(struct device *d,
 721                                   struct device_attribute *attr,
 722                                   char *buf)
 723 {
 724         struct net_bridge *br = to_bridge(d);
 725         return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
 726 }
 727
 728 static ssize_t vlan_protocol_store(struct device *d,
 729                                    struct device_attribute *attr,
 730                                    const char *buf, size_t len)
 731 {
 732         return store_bridge_parm(d, buf, len, br_vlan_set_proto);
 733 }
 734 static DEVICE_ATTR_RW(vlan_protocol);
 735
 736 static ssize_t default_pvid_show(struct device *d,
 737                                  struct device_attribute *attr,
 738                                  char *buf)
 739 {
 740         struct net_bridge *br = to_bridge(d);
 741         return sprintf(buf, "%d\n", br->default_pvid);
 742 }
 743
 744 static ssize_t default_pvid_store(struct device *d,
 745                                   struct device_attribute *attr,
 746                                   const char *buf, size_t len)
 747 {
 748         return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
 749 }
 750 static DEVICE_ATTR_RW(default_pvid);
 751 #endif
 752
 753 static struct attribute *bridge_attrs[] = {
 754         &dev_attr_forward_delay.attr,
 755         &dev_attr_hello_time.attr,
 756         &dev_attr_max_age.attr,
 757         &dev_attr_ageing_time.attr,
 758         &dev_attr_stp_state.attr,
 759         &dev_attr_group_fwd_mask.attr,
 760         &dev_attr_priority.attr,
 761         &dev_attr_bridge_id.attr,
 762         &dev_attr_root_id.attr,
 763         &dev_attr_root_path_cost.attr,
 764         &dev_attr_root_port.attr,
 765         &dev_attr_topology_change.attr,
 766         &dev_attr_topology_change_detected.attr,
 767         &dev_attr_hello_timer.attr,
 768         &dev_attr_tcn_timer.attr,
 769         &dev_attr_topology_change_timer.attr,
 770         &dev_attr_gc_timer.attr,
 771         &dev_attr_group_addr.attr,
 772         &dev_attr_flush.attr,
 773 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 774         &dev_attr_multicast_router.attr,
 775         &dev_attr_multicast_snooping.attr,
 776         &dev_attr_multicast_querier.attr,
 777         &dev_attr_multicast_query_use_ifaddr.attr,
 778         &dev_attr_hash_elasticity.attr,
 779         &dev_attr_hash_max.attr,
 780         &dev_attr_multicast_last_member_count.attr,
 781         &dev_attr_multicast_startup_query_count.attr,
 782         &dev_attr_multicast_last_member_interval.attr,
 783         &dev_attr_multicast_membership_interval.attr,
 784         &dev_attr_multicast_querier_interval.attr,
 785         &dev_attr_multicast_query_interval.attr,
 786         &dev_attr_multicast_query_response_interval.attr,
 787         &dev_attr_multicast_startup_query_interval.attr,
 788 #endif
 789 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 790         &dev_attr_nf_call_iptables.attr,
 791         &dev_attr_nf_call_ip6tables.attr,
 792         &dev_attr_nf_call_arptables.attr,
 793 #endif
 794 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 795         &dev_attr_vlan_filtering.attr,
 796         &dev_attr_vlan_protocol.attr,
 797         &dev_attr_default_pvid.attr,
 798 #endif
 799         NULL
 800 };
 801
 802 static struct attribute_group bridge_group = {
 803         .name = SYSFS_BRIDGE_ATTR,
 804         .attrs = bridge_attrs,
 805 };
 806
 807 /*
 808  * Export the forwarding information table as a binary file
 809  * The records are struct __fdb_entry.
 810  *
 811  * Returns the number of bytes read.
 812  */
 813 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
 814                               struct bin_attribute *bin_attr,
 815                               char *buf, loff_t off, size_t count)
 816 {
 817         struct device *dev = to_dev(kobj);
 818         struct net_bridge *br = to_bridge(dev);
 819         int n;
 820
 821         /* must read whole records */
 822         if (off % sizeof(struct __fdb_entry) != 0)
 823                 return -EINVAL;
 824
 825         n =  br_fdb_fillbuf(br, buf,
 826                             count / sizeof(struct __fdb_entry),
 827                             off / sizeof(struct __fdb_entry));
 828
 829         if (n > 0)
 830                 n *= sizeof(struct __fdb_entry);
 831
 832         return n;
 833 }
 834
 835 static struct bin_attribute bridge_forward = {
 836         .attr = { .name = SYSFS_BRIDGE_FDB,
 837                   .mode = S_IRUGO, },
 838         .read = brforward_read,
 839 };
 840
 841 /*
 842  * Add entries in sysfs onto the existing network class device
 843  * for the bridge.
 844  *   Adds a attribute group "bridge" containing tuning parameters.
 845  *   Binary attribute containing the forward table
 846  *   Sub directory to hold links to interfaces.
 847  *
 848  * Note: the ifobj exists only to be a subdirectory
 849  *   to hold links.  The ifobj exists in same data structure
 850  *   as it's parent the bridge so reference counting works.
 851  */
 852 int br_sysfs_addbr(struct net_device *dev)
 853 {
 854         struct kobject *brobj = &dev->dev.kobj;
 855         struct net_bridge *br = netdev_priv(dev);
 856         int err;
 857
 858         err = sysfs_create_group(brobj, &bridge_group);
 859         if (err) {
 860                 pr_info("%s: can't create group %s/%s\n",
 861                         __func__, dev->name, bridge_group.name);
 862                 goto out1;
 863         }
 864
 865         err = sysfs_create_bin_file(brobj, &bridge_forward);
 866         if (err) {
 867                 pr_info("%s: can't create attribute file %s/%s\n",
 868                         __func__, dev->name, bridge_forward.attr.name);
 869                 goto out2;
 870         }
 871
 872         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
 873         if (!br->ifobj) {
 874                 pr_info("%s: can't add kobject (directory) %s/%s\n",
 875                         __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
 876                 goto out3;
 877         }
 878         return 0;
 879  out3:
 880         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
 881  out2:
 882         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
 883  out1:
 884         return err;
 885
 886 }
 887
 888 void br_sysfs_delbr(struct net_device *dev)
 889 {
 890         struct kobject *kobj = &dev->dev.kobj;
 891         struct net_bridge *br = netdev_priv(dev);
 892
 893         kobject_put(br->ifobj);
 894         sysfs_remove_bin_file(kobj, &bridge_forward);
 895         sysfs_remove_group(kobj, &bridge_group);
 896 }