drivers/net/bonding/bond_sysfs.c

   1 /*
   2  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, see <http://www.gnu.org/licenses/>.
  16  *
  17  * The full GNU General Public License is included in this distribution in the
  18  * file called LICENSE.
  19  *
  20  */
  21
  22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/device.h>
  27 #include <linux/sched/signal.h>
  28 #include <linux/fs.h>
  29 #include <linux/types.h>
  30 #include <linux/string.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/inetdevice.h>
  33 #include <linux/in.h>
  34 #include <linux/sysfs.h>
  35 #include <linux/ctype.h>
  36 #include <linux/inet.h>
  37 #include <linux/rtnetlink.h>
  38 #include <linux/etherdevice.h>
  39 #include <net/net_namespace.h>
  40 #include <net/netns/generic.h>
  41 #include <linux/nsproxy.h>
  42
  43 #include <net/bonding.h>
  44
  45 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  46
  47 /* "show" function for the bond_masters attribute.
  48  * The class parameter is ignored.
  49  */
  50 static ssize_t bonding_show_bonds(struct class *cls,
  51                                   struct class_attribute *attr,
  52                                   char *buf)
  53 {
  54         struct bond_net *bn =
  55                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  56         int res = 0;
  57         struct bonding *bond;
  58
  59         rtnl_lock();
  60
  61         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  62                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  63                         /* not enough space for another interface name */
  64                         if ((PAGE_SIZE - res) > 10)
  65                                 res = PAGE_SIZE - 10;
  66                         res += sprintf(buf + res, "++more++ ");
  67                         break;
  68                 }
  69                 res += sprintf(buf + res, "%s ", bond->dev->name);
  70         }
  71         if (res)
  72                 buf[res-1] = '\n'; /* eat the leftover space */
  73
  74         rtnl_unlock();
  75         return res;
  76 }
  77
  78 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  79 {
  80         struct bonding *bond;
  81
  82         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  83                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  84                         return bond->dev;
  85         }
  86         return NULL;
  87 }
  88
  89 /* "store" function for the bond_masters attribute.  This is what
  90  * creates and deletes entire bonds.
  91  *
  92  * The class parameter is ignored.
  93  */
  94 static ssize_t bonding_store_bonds(struct class *cls,
  95                                    struct class_attribute *attr,
  96                                    const char *buffer, size_t count)
  97 {
  98         struct bond_net *bn =
  99                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 100         char command[IFNAMSIZ + 1] = {0, };
 101         char *ifname;
 102         int rv, res = count;
 103
 104         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 105         ifname = command + 1;
 106         if ((strlen(command) <= 1) ||
 107             !dev_valid_name(ifname))
 108                 goto err_no_cmd;
 109
 110         if (command[0] == '+') {
 111                 pr_info("%s is being created...\n", ifname);
 112                 rv = bond_create(bn->net, ifname);
 113                 if (rv) {
 114                         if (rv == -EEXIST)
 115                                 pr_info("%s already exists\n", ifname);
 116                         else
 117                                 pr_info("%s creation failed\n", ifname);
 118                         res = rv;
 119                 }
 120         } else if (command[0] == '-') {
 121                 struct net_device *bond_dev;
 122
 123                 rtnl_lock();
 124                 bond_dev = bond_get_by_name(bn, ifname);
 125                 if (bond_dev) {
 126                         pr_info("%s is being deleted...\n", ifname);
 127                         unregister_netdevice(bond_dev);
 128                 } else {
 129                         pr_err("unable to delete non-existent %s\n", ifname);
 130                         res = -ENODEV;
 131                 }
 132                 rtnl_unlock();
 133         } else
 134                 goto err_no_cmd;
 135
 136         /* Always return either count or an error.  If you return 0, you'll
 137          * get called forever, which is bad.
 138          */
 139         return res;
 140
 141 err_no_cmd:
 142         pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
 143         return -EPERM;
 144 }
 145
 146 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 147 static const struct class_attribute class_attr_bonding_masters = {
 148         .attr = {
 149                 .name = "bonding_masters",
 150                 .mode = 0644,
 151         },
 152         .show = bonding_show_bonds,
 153         .store = bonding_store_bonds,
 154 };
 155
 156 /* Generic "store" method for bonding sysfs option setting */
 157 static ssize_t bonding_sysfs_store_option(struct device *d,
 158                                           struct device_attribute *attr,
 159                                           const char *buffer, size_t count)
 160 {
 161         struct bonding *bond = to_bond(d);
 162         const struct bond_option *opt;
 163         char *buffer_clone;
 164         int ret;
 165
 166         opt = bond_opt_get_by_name(attr->attr.name);
 167         if (WARN_ON(!opt))
 168                 return -ENOENT;
 169         buffer_clone = kstrndup(buffer, count, GFP_KERNEL);
 170         if (!buffer_clone)
 171                 return -ENOMEM;
 172         ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone);
 173         if (!ret)
 174                 ret = count;
 175         kfree(buffer_clone);
 176
 177         return ret;
 178 }
 179
 180 /* Show the slaves in the current bond. */
 181 static ssize_t bonding_show_slaves(struct device *d,
 182                                    struct device_attribute *attr, char *buf)
 183 {
 184         struct bonding *bond = to_bond(d);
 185         struct list_head *iter;
 186         struct slave *slave;
 187         int res = 0;
 188
 189         if (!rtnl_trylock())
 190                 return restart_syscall();
 191
 192         bond_for_each_slave(bond, slave, iter) {
 193                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 194                         /* not enough space for another interface name */
 195                         if ((PAGE_SIZE - res) > 10)
 196                                 res = PAGE_SIZE - 10;
 197                         res += sprintf(buf + res, "++more++ ");
 198                         break;
 199                 }
 200                 res += sprintf(buf + res, "%s ", slave->dev->name);
 201         }
 202
 203         rtnl_unlock();
 204
 205         if (res)
 206                 buf[res-1] = '\n'; /* eat the leftover space */
 207
 208         return res;
 209 }
 210 static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
 211                    bonding_sysfs_store_option);
 212
 213 /* Show the bonding mode. */
 214 static ssize_t bonding_show_mode(struct device *d,
 215                                  struct device_attribute *attr, char *buf)
 216 {
 217         struct bonding *bond = to_bond(d);
 218         const struct bond_opt_value *val;
 219
 220         val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
 221
 222         return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond));
 223 }
 224 static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
 225
 226 /* Show the bonding transmit hash method. */
 227 static ssize_t bonding_show_xmit_hash(struct device *d,
 228                                       struct device_attribute *attr,
 229                                       char *buf)
 230 {
 231         struct bonding *bond = to_bond(d);
 232         const struct bond_opt_value *val;
 233
 234         val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
 235
 236         return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
 237 }
 238 static DEVICE_ATTR(xmit_hash_policy, 0644,
 239                    bonding_show_xmit_hash, bonding_sysfs_store_option);
 240
 241 /* Show arp_validate. */
 242 static ssize_t bonding_show_arp_validate(struct device *d,
 243                                          struct device_attribute *attr,
 244                                          char *buf)
 245 {
 246         struct bonding *bond = to_bond(d);
 247         const struct bond_opt_value *val;
 248
 249         val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
 250                                bond->params.arp_validate);
 251
 252         return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
 253 }
 254 static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
 255                    bonding_sysfs_store_option);
 256
 257 /* Show arp_all_targets. */
 258 static ssize_t bonding_show_arp_all_targets(struct device *d,
 259                                          struct device_attribute *attr,
 260                                          char *buf)
 261 {
 262         struct bonding *bond = to_bond(d);
 263         const struct bond_opt_value *val;
 264
 265         val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
 266                                bond->params.arp_all_targets);
 267         return sprintf(buf, "%s %d\n",
 268                        val->string, bond->params.arp_all_targets);
 269 }
 270 static DEVICE_ATTR(arp_all_targets, 0644,
 271                    bonding_show_arp_all_targets, bonding_sysfs_store_option);
 272
 273 /* Show fail_over_mac. */
 274 static ssize_t bonding_show_fail_over_mac(struct device *d,
 275                                           struct device_attribute *attr,
 276                                           char *buf)
 277 {
 278         struct bonding *bond = to_bond(d);
 279         const struct bond_opt_value *val;
 280
 281         val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
 282                                bond->params.fail_over_mac);
 283
 284         return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
 285 }
 286 static DEVICE_ATTR(fail_over_mac, 0644,
 287                    bonding_show_fail_over_mac, bonding_sysfs_store_option);
 288
 289 /* Show the arp timer interval. */
 290 static ssize_t bonding_show_arp_interval(struct device *d,
 291                                          struct device_attribute *attr,
 292                                          char *buf)
 293 {
 294         struct bonding *bond = to_bond(d);
 295
 296         return sprintf(buf, "%d\n", bond->params.arp_interval);
 297 }
 298 static DEVICE_ATTR(arp_interval, 0644,
 299                    bonding_show_arp_interval, bonding_sysfs_store_option);
 300
 301 /* Show the arp targets. */
 302 static ssize_t bonding_show_arp_targets(struct device *d,
 303                                         struct device_attribute *attr,
 304                                         char *buf)
 305 {
 306         struct bonding *bond = to_bond(d);
 307         int i, res = 0;
 308
 309         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 310                 if (bond->params.arp_targets[i])
 311                         res += sprintf(buf + res, "%pI4 ",
 312                                        &bond->params.arp_targets[i]);
 313         }
 314         if (res)
 315                 buf[res-1] = '\n'; /* eat the leftover space */
 316
 317         return res;
 318 }
 319 static DEVICE_ATTR(arp_ip_target, 0644,
 320                    bonding_show_arp_targets, bonding_sysfs_store_option);
 321
 322 /* Show the up and down delays. */
 323 static ssize_t bonding_show_downdelay(struct device *d,
 324                                       struct device_attribute *attr,
 325                                       char *buf)
 326 {
 327         struct bonding *bond = to_bond(d);
 328
 329         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 330 }
 331 static DEVICE_ATTR(downdelay, 0644,
 332                    bonding_show_downdelay, bonding_sysfs_store_option);
 333
 334 static ssize_t bonding_show_updelay(struct device *d,
 335                                     struct device_attribute *attr,
 336                                     char *buf)
 337 {
 338         struct bonding *bond = to_bond(d);
 339
 340         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 341
 342 }
 343 static DEVICE_ATTR(updelay, 0644,
 344                    bonding_show_updelay, bonding_sysfs_store_option);
 345
 346 /* Show the LACP interval. */
 347 static ssize_t bonding_show_lacp(struct device *d,
 348                                  struct device_attribute *attr,
 349                                  char *buf)
 350 {
 351         struct bonding *bond = to_bond(d);
 352         const struct bond_opt_value *val;
 353
 354         val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
 355
 356         return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
 357 }
 358 static DEVICE_ATTR(lacp_rate, 0644,
 359                    bonding_show_lacp, bonding_sysfs_store_option);
 360
 361 static ssize_t bonding_show_min_links(struct device *d,
 362                                       struct device_attribute *attr,
 363                                       char *buf)
 364 {
 365         struct bonding *bond = to_bond(d);
 366
 367         return sprintf(buf, "%u\n", bond->params.min_links);
 368 }
 369 static DEVICE_ATTR(min_links, 0644,
 370                    bonding_show_min_links, bonding_sysfs_store_option);
 371
 372 static ssize_t bonding_show_ad_select(struct device *d,
 373                                       struct device_attribute *attr,
 374                                       char *buf)
 375 {
 376         struct bonding *bond = to_bond(d);
 377         const struct bond_opt_value *val;
 378
 379         val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
 380
 381         return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
 382 }
 383 static DEVICE_ATTR(ad_select, 0644,
 384                    bonding_show_ad_select, bonding_sysfs_store_option);
 385
 386 /* Show the number of peer notifications to send after a failover event. */
 387 static ssize_t bonding_show_num_peer_notif(struct device *d,
 388                                            struct device_attribute *attr,
 389                                            char *buf)
 390 {
 391         struct bonding *bond = to_bond(d);
 392         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 393 }
 394 static DEVICE_ATTR(num_grat_arp, 0644,
 395                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 396 static DEVICE_ATTR(num_unsol_na, 0644,
 397                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 398
 399 /* Show the MII monitor interval. */
 400 static ssize_t bonding_show_miimon(struct device *d,
 401                                    struct device_attribute *attr,
 402                                    char *buf)
 403 {
 404         struct bonding *bond = to_bond(d);
 405
 406         return sprintf(buf, "%d\n", bond->params.miimon);
 407 }
 408 static DEVICE_ATTR(miimon, 0644,
 409                    bonding_show_miimon, bonding_sysfs_store_option);
 410
 411 /* Show the primary slave. */
 412 static ssize_t bonding_show_primary(struct device *d,
 413                                     struct device_attribute *attr,
 414                                     char *buf)
 415 {
 416         struct bonding *bond = to_bond(d);
 417         struct slave *primary;
 418         int count = 0;
 419
 420         rcu_read_lock();
 421         primary = rcu_dereference(bond->primary_slave);
 422         if (primary)
 423                 count = sprintf(buf, "%s\n", primary->dev->name);
 424         rcu_read_unlock();
 425
 426         return count;
 427 }
 428 static DEVICE_ATTR(primary, 0644,
 429                    bonding_show_primary, bonding_sysfs_store_option);
 430
 431 /* Show the primary_reselect flag. */
 432 static ssize_t bonding_show_primary_reselect(struct device *d,
 433                                              struct device_attribute *attr,
 434                                              char *buf)
 435 {
 436         struct bonding *bond = to_bond(d);
 437         const struct bond_opt_value *val;
 438
 439         val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
 440                                bond->params.primary_reselect);
 441
 442         return sprintf(buf, "%s %d\n",
 443                        val->string, bond->params.primary_reselect);
 444 }
 445 static DEVICE_ATTR(primary_reselect, 0644,
 446                    bonding_show_primary_reselect, bonding_sysfs_store_option);
 447
 448 /* Show the use_carrier flag. */
 449 static ssize_t bonding_show_carrier(struct device *d,
 450                                     struct device_attribute *attr,
 451                                     char *buf)
 452 {
 453         struct bonding *bond = to_bond(d);
 454
 455         return sprintf(buf, "%d\n", bond->params.use_carrier);
 456 }
 457 static DEVICE_ATTR(use_carrier, 0644,
 458                    bonding_show_carrier, bonding_sysfs_store_option);
 459
 460
 461 /* Show currently active_slave. */
 462 static ssize_t bonding_show_active_slave(struct device *d,
 463                                          struct device_attribute *attr,
 464                                          char *buf)
 465 {
 466         struct bonding *bond = to_bond(d);
 467         struct net_device *slave_dev;
 468         int count = 0;
 469
 470         rcu_read_lock();
 471         slave_dev = bond_option_active_slave_get_rcu(bond);
 472         if (slave_dev)
 473                 count = sprintf(buf, "%s\n", slave_dev->name);
 474         rcu_read_unlock();
 475
 476         return count;
 477 }
 478 static DEVICE_ATTR(active_slave, 0644,
 479                    bonding_show_active_slave, bonding_sysfs_store_option);
 480
 481 /* Show link status of the bond interface. */
 482 static ssize_t bonding_show_mii_status(struct device *d,
 483                                        struct device_attribute *attr,
 484                                        char *buf)
 485 {
 486         struct bonding *bond = to_bond(d);
 487         bool active = netif_carrier_ok(bond->dev);
 488
 489         return sprintf(buf, "%s\n", active ? "up" : "down");
 490 }
 491 static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
 492
 493 /* Show current 802.3ad aggregator ID. */
 494 static ssize_t bonding_show_ad_aggregator(struct device *d,
 495                                           struct device_attribute *attr,
 496                                           char *buf)
 497 {
 498         int count = 0;
 499         struct bonding *bond = to_bond(d);
 500
 501         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 502                 struct ad_info ad_info;
 503                 count = sprintf(buf, "%d\n",
 504                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 505                                 ?  0 : ad_info.aggregator_id);
 506         }
 507
 508         return count;
 509 }
 510 static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
 511
 512
 513 /* Show number of active 802.3ad ports. */
 514 static ssize_t bonding_show_ad_num_ports(struct device *d,
 515                                          struct device_attribute *attr,
 516                                          char *buf)
 517 {
 518         int count = 0;
 519         struct bonding *bond = to_bond(d);
 520
 521         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 522                 struct ad_info ad_info;
 523                 count = sprintf(buf, "%d\n",
 524                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 525                                 ?  0 : ad_info.ports);
 526         }
 527
 528         return count;
 529 }
 530 static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
 531
 532
 533 /* Show current 802.3ad actor key. */
 534 static ssize_t bonding_show_ad_actor_key(struct device *d,
 535                                          struct device_attribute *attr,
 536                                          char *buf)
 537 {
 538         int count = 0;
 539         struct bonding *bond = to_bond(d);
 540
 541         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 542                 struct ad_info ad_info;
 543                 count = sprintf(buf, "%d\n",
 544                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 545                                 ?  0 : ad_info.actor_key);
 546         }
 547
 548         return count;
 549 }
 550 static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
 551
 552
 553 /* Show current 802.3ad partner key. */
 554 static ssize_t bonding_show_ad_partner_key(struct device *d,
 555                                            struct device_attribute *attr,
 556                                            char *buf)
 557 {
 558         int count = 0;
 559         struct bonding *bond = to_bond(d);
 560
 561         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 562                 struct ad_info ad_info;
 563                 count = sprintf(buf, "%d\n",
 564                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 565                                 ?  0 : ad_info.partner_key);
 566         }
 567
 568         return count;
 569 }
 570 static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
 571
 572
 573 /* Show current 802.3ad partner mac. */
 574 static ssize_t bonding_show_ad_partner_mac(struct device *d,
 575                                            struct device_attribute *attr,
 576                                            char *buf)
 577 {
 578         int count = 0;
 579         struct bonding *bond = to_bond(d);
 580
 581         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 582                 struct ad_info ad_info;
 583                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
 584                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
 585         }
 586
 587         return count;
 588 }
 589 static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
 590
 591 /* Show the queue_ids of the slaves in the current bond. */
 592 static ssize_t bonding_show_queue_id(struct device *d,
 593                                      struct device_attribute *attr,
 594                                      char *buf)
 595 {
 596         struct bonding *bond = to_bond(d);
 597         struct list_head *iter;
 598         struct slave *slave;
 599         int res = 0;
 600
 601         if (!rtnl_trylock())
 602                 return restart_syscall();
 603
 604         bond_for_each_slave(bond, slave, iter) {
 605                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
 606                         /* not enough space for another interface_name:queue_id pair */
 607                         if ((PAGE_SIZE - res) > 10)
 608                                 res = PAGE_SIZE - 10;
 609                         res += sprintf(buf + res, "++more++ ");
 610                         break;
 611                 }
 612                 res += sprintf(buf + res, "%s:%d ",
 613                                slave->dev->name, slave->queue_id);
 614         }
 615         if (res)
 616                 buf[res-1] = '\n'; /* eat the leftover space */
 617
 618         rtnl_unlock();
 619
 620         return res;
 621 }
 622 static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
 623                    bonding_sysfs_store_option);
 624
 625
 626 /* Show the all_slaves_active flag. */
 627 static ssize_t bonding_show_slaves_active(struct device *d,
 628                                           struct device_attribute *attr,
 629                                           char *buf)
 630 {
 631         struct bonding *bond = to_bond(d);
 632
 633         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
 634 }
 635 static DEVICE_ATTR(all_slaves_active, 0644,
 636                    bonding_show_slaves_active, bonding_sysfs_store_option);
 637
 638 /* Show the number of IGMP membership reports to send on link failure */
 639 static ssize_t bonding_show_resend_igmp(struct device *d,
 640                                         struct device_attribute *attr,
 641                                         char *buf)
 642 {
 643         struct bonding *bond = to_bond(d);
 644
 645         return sprintf(buf, "%d\n", bond->params.resend_igmp);
 646 }
 647 static DEVICE_ATTR(resend_igmp, 0644,
 648                    bonding_show_resend_igmp, bonding_sysfs_store_option);
 649
 650
 651 static ssize_t bonding_show_lp_interval(struct device *d,
 652                                         struct device_attribute *attr,
 653                                         char *buf)
 654 {
 655         struct bonding *bond = to_bond(d);
 656
 657         return sprintf(buf, "%d\n", bond->params.lp_interval);
 658 }
 659 static DEVICE_ATTR(lp_interval, 0644,
 660                    bonding_show_lp_interval, bonding_sysfs_store_option);
 661
 662 static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
 663                                            struct device_attribute *attr,
 664                                            char *buf)
 665 {
 666         struct bonding *bond = to_bond(d);
 667         return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
 668 }
 669 static DEVICE_ATTR(tlb_dynamic_lb, 0644,
 670                    bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
 671
 672 static ssize_t bonding_show_packets_per_slave(struct device *d,
 673                                               struct device_attribute *attr,
 674                                               char *buf)
 675 {
 676         struct bonding *bond = to_bond(d);
 677         unsigned int packets_per_slave = bond->params.packets_per_slave;
 678
 679         return sprintf(buf, "%u\n", packets_per_slave);
 680 }
 681 static DEVICE_ATTR(packets_per_slave, 0644,
 682                    bonding_show_packets_per_slave, bonding_sysfs_store_option);
 683
 684 static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
 685                                               struct device_attribute *attr,
 686                                               char *buf)
 687 {
 688         struct bonding *bond = to_bond(d);
 689
 690         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 691                 return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
 692
 693         return 0;
 694 }
 695 static DEVICE_ATTR(ad_actor_sys_prio, 0644,
 696                    bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
 697
 698 static ssize_t bonding_show_ad_actor_system(struct device *d,
 699                                             struct device_attribute *attr,
 700                                             char *buf)
 701 {
 702         struct bonding *bond = to_bond(d);
 703
 704         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 705                 return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
 706
 707         return 0;
 708 }
 709
 710 static DEVICE_ATTR(ad_actor_system, 0644,
 711                    bonding_show_ad_actor_system, bonding_sysfs_store_option);
 712
 713 static ssize_t bonding_show_ad_user_port_key(struct device *d,
 714                                              struct device_attribute *attr,
 715                                              char *buf)
 716 {
 717         struct bonding *bond = to_bond(d);
 718
 719         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 720                 return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
 721
 722         return 0;
 723 }
 724 static DEVICE_ATTR(ad_user_port_key, 0644,
 725                    bonding_show_ad_user_port_key, bonding_sysfs_store_option);
 726
 727 static struct attribute *per_bond_attrs[] = {
 728         &dev_attr_slaves.attr,
 729         &dev_attr_mode.attr,
 730         &dev_attr_fail_over_mac.attr,
 731         &dev_attr_arp_validate.attr,
 732         &dev_attr_arp_all_targets.attr,
 733         &dev_attr_arp_interval.attr,
 734         &dev_attr_arp_ip_target.attr,
 735         &dev_attr_downdelay.attr,
 736         &dev_attr_updelay.attr,
 737         &dev_attr_lacp_rate.attr,
 738         &dev_attr_ad_select.attr,
 739         &dev_attr_xmit_hash_policy.attr,
 740         &dev_attr_num_grat_arp.attr,
 741         &dev_attr_num_unsol_na.attr,
 742         &dev_attr_miimon.attr,
 743         &dev_attr_primary.attr,
 744         &dev_attr_primary_reselect.attr,
 745         &dev_attr_use_carrier.attr,
 746         &dev_attr_active_slave.attr,
 747         &dev_attr_mii_status.attr,
 748         &dev_attr_ad_aggregator.attr,
 749         &dev_attr_ad_num_ports.attr,
 750         &dev_attr_ad_actor_key.attr,
 751         &dev_attr_ad_partner_key.attr,
 752         &dev_attr_ad_partner_mac.attr,
 753         &dev_attr_queue_id.attr,
 754         &dev_attr_all_slaves_active.attr,
 755         &dev_attr_resend_igmp.attr,
 756         &dev_attr_min_links.attr,
 757         &dev_attr_lp_interval.attr,
 758         &dev_attr_packets_per_slave.attr,
 759         &dev_attr_tlb_dynamic_lb.attr,
 760         &dev_attr_ad_actor_sys_prio.attr,
 761         &dev_attr_ad_actor_system.attr,
 762         &dev_attr_ad_user_port_key.attr,
 763         NULL,
 764 };
 765
 766 static const struct attribute_group bonding_group = {
 767         .name = "bonding",
 768         .attrs = per_bond_attrs,
 769 };
 770
 771 /* Initialize sysfs.  This sets up the bonding_masters file in
 772  * /sys/class/net.
 773  */
 774 int bond_create_sysfs(struct bond_net *bn)
 775 {
 776         int ret;
 777
 778         bn->class_attr_bonding_masters = class_attr_bonding_masters;
 779         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
 780
 781         ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
 782                                           bn->net);
 783         /* Permit multiple loads of the module by ignoring failures to
 784          * create the bonding_masters sysfs file.  Bonding devices
 785          * created by second or subsequent loads of the module will
 786          * not be listed in, or controllable by, bonding_masters, but
 787          * will have the usual "bonding" sysfs directory.
 788          *
 789          * This is done to preserve backwards compatibility for
 790          * initscripts/sysconfig, which load bonding multiple times to
 791          * configure multiple bonding devices.
 792          */
 793         if (ret == -EEXIST) {
 794                 /* Is someone being kinky and naming a device bonding_master? */
 795                 if (__dev_get_by_name(bn->net,
 796                                       class_attr_bonding_masters.attr.name))
 797                         pr_err("network device named %s already exists in sysfs\n",
 798                                class_attr_bonding_masters.attr.name);
 799                 ret = 0;
 800         }
 801
 802         return ret;
 803
 804 }
 805
 806 /* Remove /sys/class/net/bonding_masters. */
 807 void bond_destroy_sysfs(struct bond_net *bn)
 808 {
 809         netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
 810 }
 811
 812 /* Initialize sysfs for each bond.  This sets up and registers
 813  * the 'bondctl' directory for each individual bond under /sys/class/net.
 814  */
 815 void bond_prepare_sysfs_group(struct bonding *bond)
 816 {
 817         bond->dev->sysfs_groups[0] = &bonding_group;
 818 }
 819