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         int ret;
 164
 165         opt = bond_opt_get_by_name(attr->attr.name);
 166         if (WARN_ON(!opt))
 167                 return -ENOENT;
 168         ret = bond_opt_tryset_rtnl(bond, opt->id, (char *)buffer);
 169         if (!ret)
 170                 ret = count;
 171
 172         return ret;
 173 }
 174
 175 /* Show the slaves in the current bond. */
 176 static ssize_t bonding_show_slaves(struct device *d,
 177                                    struct device_attribute *attr, char *buf)
 178 {
 179         struct bonding *bond = to_bond(d);
 180         struct list_head *iter;
 181         struct slave *slave;
 182         int res = 0;
 183
 184         if (!rtnl_trylock())
 185                 return restart_syscall();
 186
 187         bond_for_each_slave(bond, slave, iter) {
 188                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 189                         /* not enough space for another interface name */
 190                         if ((PAGE_SIZE - res) > 10)
 191                                 res = PAGE_SIZE - 10;
 192                         res += sprintf(buf + res, "++more++ ");
 193                         break;
 194                 }
 195                 res += sprintf(buf + res, "%s ", slave->dev->name);
 196         }
 197
 198         rtnl_unlock();
 199
 200         if (res)
 201                 buf[res-1] = '\n'; /* eat the leftover space */
 202
 203         return res;
 204 }
 205 static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
 206                    bonding_sysfs_store_option);
 207
 208 /* Show the bonding mode. */
 209 static ssize_t bonding_show_mode(struct device *d,
 210                                  struct device_attribute *attr, char *buf)
 211 {
 212         struct bonding *bond = to_bond(d);
 213         const struct bond_opt_value *val;
 214
 215         val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
 216
 217         return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond));
 218 }
 219 static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
 220
 221 /* Show the bonding transmit hash method. */
 222 static ssize_t bonding_show_xmit_hash(struct device *d,
 223                                       struct device_attribute *attr,
 224                                       char *buf)
 225 {
 226         struct bonding *bond = to_bond(d);
 227         const struct bond_opt_value *val;
 228
 229         val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
 230
 231         return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
 232 }
 233 static DEVICE_ATTR(xmit_hash_policy, 0644,
 234                    bonding_show_xmit_hash, bonding_sysfs_store_option);
 235
 236 /* Show arp_validate. */
 237 static ssize_t bonding_show_arp_validate(struct device *d,
 238                                          struct device_attribute *attr,
 239                                          char *buf)
 240 {
 241         struct bonding *bond = to_bond(d);
 242         const struct bond_opt_value *val;
 243
 244         val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
 245                                bond->params.arp_validate);
 246
 247         return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
 248 }
 249 static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
 250                    bonding_sysfs_store_option);
 251
 252 /* Show arp_all_targets. */
 253 static ssize_t bonding_show_arp_all_targets(struct device *d,
 254                                          struct device_attribute *attr,
 255                                          char *buf)
 256 {
 257         struct bonding *bond = to_bond(d);
 258         const struct bond_opt_value *val;
 259
 260         val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
 261                                bond->params.arp_all_targets);
 262         return sprintf(buf, "%s %d\n",
 263                        val->string, bond->params.arp_all_targets);
 264 }
 265 static DEVICE_ATTR(arp_all_targets, 0644,
 266                    bonding_show_arp_all_targets, bonding_sysfs_store_option);
 267
 268 /* Show fail_over_mac. */
 269 static ssize_t bonding_show_fail_over_mac(struct device *d,
 270                                           struct device_attribute *attr,
 271                                           char *buf)
 272 {
 273         struct bonding *bond = to_bond(d);
 274         const struct bond_opt_value *val;
 275
 276         val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
 277                                bond->params.fail_over_mac);
 278
 279         return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
 280 }
 281 static DEVICE_ATTR(fail_over_mac, 0644,
 282                    bonding_show_fail_over_mac, bonding_sysfs_store_option);
 283
 284 /* Show the arp timer interval. */
 285 static ssize_t bonding_show_arp_interval(struct device *d,
 286                                          struct device_attribute *attr,
 287                                          char *buf)
 288 {
 289         struct bonding *bond = to_bond(d);
 290
 291         return sprintf(buf, "%d\n", bond->params.arp_interval);
 292 }
 293 static DEVICE_ATTR(arp_interval, 0644,
 294                    bonding_show_arp_interval, bonding_sysfs_store_option);
 295
 296 /* Show the arp targets. */
 297 static ssize_t bonding_show_arp_targets(struct device *d,
 298                                         struct device_attribute *attr,
 299                                         char *buf)
 300 {
 301         struct bonding *bond = to_bond(d);
 302         int i, res = 0;
 303
 304         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 305                 if (bond->params.arp_targets[i])
 306                         res += sprintf(buf + res, "%pI4 ",
 307                                        &bond->params.arp_targets[i]);
 308         }
 309         if (res)
 310                 buf[res-1] = '\n'; /* eat the leftover space */
 311
 312         return res;
 313 }
 314 static DEVICE_ATTR(arp_ip_target, 0644,
 315                    bonding_show_arp_targets, bonding_sysfs_store_option);
 316
 317 /* Show the up and down delays. */
 318 static ssize_t bonding_show_downdelay(struct device *d,
 319                                       struct device_attribute *attr,
 320                                       char *buf)
 321 {
 322         struct bonding *bond = to_bond(d);
 323
 324         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 325 }
 326 static DEVICE_ATTR(downdelay, 0644,
 327                    bonding_show_downdelay, bonding_sysfs_store_option);
 328
 329 static ssize_t bonding_show_updelay(struct device *d,
 330                                     struct device_attribute *attr,
 331                                     char *buf)
 332 {
 333         struct bonding *bond = to_bond(d);
 334
 335         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 336
 337 }
 338 static DEVICE_ATTR(updelay, 0644,
 339                    bonding_show_updelay, bonding_sysfs_store_option);
 340
 341 /* Show the LACP interval. */
 342 static ssize_t bonding_show_lacp(struct device *d,
 343                                  struct device_attribute *attr,
 344                                  char *buf)
 345 {
 346         struct bonding *bond = to_bond(d);
 347         const struct bond_opt_value *val;
 348
 349         val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
 350
 351         return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
 352 }
 353 static DEVICE_ATTR(lacp_rate, 0644,
 354                    bonding_show_lacp, bonding_sysfs_store_option);
 355
 356 static ssize_t bonding_show_min_links(struct device *d,
 357                                       struct device_attribute *attr,
 358                                       char *buf)
 359 {
 360         struct bonding *bond = to_bond(d);
 361
 362         return sprintf(buf, "%u\n", bond->params.min_links);
 363 }
 364 static DEVICE_ATTR(min_links, 0644,
 365                    bonding_show_min_links, bonding_sysfs_store_option);
 366
 367 static ssize_t bonding_show_ad_select(struct device *d,
 368                                       struct device_attribute *attr,
 369                                       char *buf)
 370 {
 371         struct bonding *bond = to_bond(d);
 372         const struct bond_opt_value *val;
 373
 374         val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
 375
 376         return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
 377 }
 378 static DEVICE_ATTR(ad_select, 0644,
 379                    bonding_show_ad_select, bonding_sysfs_store_option);
 380
 381 /* Show the number of peer notifications to send after a failover event. */
 382 static ssize_t bonding_show_num_peer_notif(struct device *d,
 383                                            struct device_attribute *attr,
 384                                            char *buf)
 385 {
 386         struct bonding *bond = to_bond(d);
 387         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 388 }
 389 static DEVICE_ATTR(num_grat_arp, 0644,
 390                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 391 static DEVICE_ATTR(num_unsol_na, 0644,
 392                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 393
 394 /* Show the MII monitor interval. */
 395 static ssize_t bonding_show_miimon(struct device *d,
 396                                    struct device_attribute *attr,
 397                                    char *buf)
 398 {
 399         struct bonding *bond = to_bond(d);
 400
 401         return sprintf(buf, "%d\n", bond->params.miimon);
 402 }
 403 static DEVICE_ATTR(miimon, 0644,
 404                    bonding_show_miimon, bonding_sysfs_store_option);
 405
 406 /* Show the primary slave. */
 407 static ssize_t bonding_show_primary(struct device *d,
 408                                     struct device_attribute *attr,
 409                                     char *buf)
 410 {
 411         struct bonding *bond = to_bond(d);
 412         struct slave *primary;
 413         int count = 0;
 414
 415         rcu_read_lock();
 416         primary = rcu_dereference(bond->primary_slave);
 417         if (primary)
 418                 count = sprintf(buf, "%s\n", primary->dev->name);
 419         rcu_read_unlock();
 420
 421         return count;
 422 }
 423 static DEVICE_ATTR(primary, 0644,
 424                    bonding_show_primary, bonding_sysfs_store_option);
 425
 426 /* Show the primary_reselect flag. */
 427 static ssize_t bonding_show_primary_reselect(struct device *d,
 428                                              struct device_attribute *attr,
 429                                              char *buf)
 430 {
 431         struct bonding *bond = to_bond(d);
 432         const struct bond_opt_value *val;
 433
 434         val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
 435                                bond->params.primary_reselect);
 436
 437         return sprintf(buf, "%s %d\n",
 438                        val->string, bond->params.primary_reselect);
 439 }
 440 static DEVICE_ATTR(primary_reselect, 0644,
 441                    bonding_show_primary_reselect, bonding_sysfs_store_option);
 442
 443 /* Show the use_carrier flag. */
 444 static ssize_t bonding_show_carrier(struct device *d,
 445                                     struct device_attribute *attr,
 446                                     char *buf)
 447 {
 448         struct bonding *bond = to_bond(d);
 449
 450         return sprintf(buf, "%d\n", bond->params.use_carrier);
 451 }
 452 static DEVICE_ATTR(use_carrier, 0644,
 453                    bonding_show_carrier, bonding_sysfs_store_option);
 454
 455
 456 /* Show currently active_slave. */
 457 static ssize_t bonding_show_active_slave(struct device *d,
 458                                          struct device_attribute *attr,
 459                                          char *buf)
 460 {
 461         struct bonding *bond = to_bond(d);
 462         struct net_device *slave_dev;
 463         int count = 0;
 464
 465         rcu_read_lock();
 466         slave_dev = bond_option_active_slave_get_rcu(bond);
 467         if (slave_dev)
 468                 count = sprintf(buf, "%s\n", slave_dev->name);
 469         rcu_read_unlock();
 470
 471         return count;
 472 }
 473 static DEVICE_ATTR(active_slave, 0644,
 474                    bonding_show_active_slave, bonding_sysfs_store_option);
 475
 476 /* Show link status of the bond interface. */
 477 static ssize_t bonding_show_mii_status(struct device *d,
 478                                        struct device_attribute *attr,
 479                                        char *buf)
 480 {
 481         struct bonding *bond = to_bond(d);
 482         bool active = netif_carrier_ok(bond->dev);
 483
 484         return sprintf(buf, "%s\n", active ? "up" : "down");
 485 }
 486 static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
 487
 488 /* Show current 802.3ad aggregator ID. */
 489 static ssize_t bonding_show_ad_aggregator(struct device *d,
 490                                           struct device_attribute *attr,
 491                                           char *buf)
 492 {
 493         int count = 0;
 494         struct bonding *bond = to_bond(d);
 495
 496         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 497                 struct ad_info ad_info;
 498                 count = sprintf(buf, "%d\n",
 499                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 500                                 ?  0 : ad_info.aggregator_id);
 501         }
 502
 503         return count;
 504 }
 505 static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
 506
 507
 508 /* Show number of active 802.3ad ports. */
 509 static ssize_t bonding_show_ad_num_ports(struct device *d,
 510                                          struct device_attribute *attr,
 511                                          char *buf)
 512 {
 513         int count = 0;
 514         struct bonding *bond = to_bond(d);
 515
 516         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 517                 struct ad_info ad_info;
 518                 count = sprintf(buf, "%d\n",
 519                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 520                                 ?  0 : ad_info.ports);
 521         }
 522
 523         return count;
 524 }
 525 static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
 526
 527
 528 /* Show current 802.3ad actor key. */
 529 static ssize_t bonding_show_ad_actor_key(struct device *d,
 530                                          struct device_attribute *attr,
 531                                          char *buf)
 532 {
 533         int count = 0;
 534         struct bonding *bond = to_bond(d);
 535
 536         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 537                 struct ad_info ad_info;
 538                 count = sprintf(buf, "%d\n",
 539                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 540                                 ?  0 : ad_info.actor_key);
 541         }
 542
 543         return count;
 544 }
 545 static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
 546
 547
 548 /* Show current 802.3ad partner key. */
 549 static ssize_t bonding_show_ad_partner_key(struct device *d,
 550                                            struct device_attribute *attr,
 551                                            char *buf)
 552 {
 553         int count = 0;
 554         struct bonding *bond = to_bond(d);
 555
 556         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 557                 struct ad_info ad_info;
 558                 count = sprintf(buf, "%d\n",
 559                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 560                                 ?  0 : ad_info.partner_key);
 561         }
 562
 563         return count;
 564 }
 565 static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
 566
 567
 568 /* Show current 802.3ad partner mac. */
 569 static ssize_t bonding_show_ad_partner_mac(struct device *d,
 570                                            struct device_attribute *attr,
 571                                            char *buf)
 572 {
 573         int count = 0;
 574         struct bonding *bond = to_bond(d);
 575
 576         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 577                 struct ad_info ad_info;
 578                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
 579                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
 580         }
 581
 582         return count;
 583 }
 584 static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
 585
 586 /* Show the queue_ids of the slaves in the current bond. */
 587 static ssize_t bonding_show_queue_id(struct device *d,
 588                                      struct device_attribute *attr,
 589                                      char *buf)
 590 {
 591         struct bonding *bond = to_bond(d);
 592         struct list_head *iter;
 593         struct slave *slave;
 594         int res = 0;
 595
 596         if (!rtnl_trylock())
 597                 return restart_syscall();
 598
 599         bond_for_each_slave(bond, slave, iter) {
 600                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
 601                         /* not enough space for another interface_name:queue_id pair */
 602                         if ((PAGE_SIZE - res) > 10)
 603                                 res = PAGE_SIZE - 10;
 604                         res += sprintf(buf + res, "++more++ ");
 605                         break;
 606                 }
 607                 res += sprintf(buf + res, "%s:%d ",
 608                                slave->dev->name, slave->queue_id);
 609         }
 610         if (res)
 611                 buf[res-1] = '\n'; /* eat the leftover space */
 612
 613         rtnl_unlock();
 614
 615         return res;
 616 }
 617 static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
 618                    bonding_sysfs_store_option);
 619
 620
 621 /* Show the all_slaves_active flag. */
 622 static ssize_t bonding_show_slaves_active(struct device *d,
 623                                           struct device_attribute *attr,
 624                                           char *buf)
 625 {
 626         struct bonding *bond = to_bond(d);
 627
 628         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
 629 }
 630 static DEVICE_ATTR(all_slaves_active, 0644,
 631                    bonding_show_slaves_active, bonding_sysfs_store_option);
 632
 633 /* Show the number of IGMP membership reports to send on link failure */
 634 static ssize_t bonding_show_resend_igmp(struct device *d,
 635                                         struct device_attribute *attr,
 636                                         char *buf)
 637 {
 638         struct bonding *bond = to_bond(d);
 639
 640         return sprintf(buf, "%d\n", bond->params.resend_igmp);
 641 }
 642 static DEVICE_ATTR(resend_igmp, 0644,
 643                    bonding_show_resend_igmp, bonding_sysfs_store_option);
 644
 645
 646 static ssize_t bonding_show_lp_interval(struct device *d,
 647                                         struct device_attribute *attr,
 648                                         char *buf)
 649 {
 650         struct bonding *bond = to_bond(d);
 651
 652         return sprintf(buf, "%d\n", bond->params.lp_interval);
 653 }
 654 static DEVICE_ATTR(lp_interval, 0644,
 655                    bonding_show_lp_interval, bonding_sysfs_store_option);
 656
 657 static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
 658                                            struct device_attribute *attr,
 659                                            char *buf)
 660 {
 661         struct bonding *bond = to_bond(d);
 662         return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
 663 }
 664 static DEVICE_ATTR(tlb_dynamic_lb, 0644,
 665                    bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
 666
 667 static ssize_t bonding_show_packets_per_slave(struct device *d,
 668                                               struct device_attribute *attr,
 669                                               char *buf)
 670 {
 671         struct bonding *bond = to_bond(d);
 672         unsigned int packets_per_slave = bond->params.packets_per_slave;
 673
 674         return sprintf(buf, "%u\n", packets_per_slave);
 675 }
 676 static DEVICE_ATTR(packets_per_slave, 0644,
 677                    bonding_show_packets_per_slave, bonding_sysfs_store_option);
 678
 679 static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
 680                                               struct device_attribute *attr,
 681                                               char *buf)
 682 {
 683         struct bonding *bond = to_bond(d);
 684
 685         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 686                 return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
 687
 688         return 0;
 689 }
 690 static DEVICE_ATTR(ad_actor_sys_prio, 0644,
 691                    bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
 692
 693 static ssize_t bonding_show_ad_actor_system(struct device *d,
 694                                             struct device_attribute *attr,
 695                                             char *buf)
 696 {
 697         struct bonding *bond = to_bond(d);
 698
 699         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 700                 return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
 701
 702         return 0;
 703 }
 704
 705 static DEVICE_ATTR(ad_actor_system, 0644,
 706                    bonding_show_ad_actor_system, bonding_sysfs_store_option);
 707
 708 static ssize_t bonding_show_ad_user_port_key(struct device *d,
 709                                              struct device_attribute *attr,
 710                                              char *buf)
 711 {
 712         struct bonding *bond = to_bond(d);
 713
 714         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 715                 return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
 716
 717         return 0;
 718 }
 719 static DEVICE_ATTR(ad_user_port_key, 0644,
 720                    bonding_show_ad_user_port_key, bonding_sysfs_store_option);
 721
 722 static struct attribute *per_bond_attrs[] = {
 723         &dev_attr_slaves.attr,
 724         &dev_attr_mode.attr,
 725         &dev_attr_fail_over_mac.attr,
 726         &dev_attr_arp_validate.attr,
 727         &dev_attr_arp_all_targets.attr,
 728         &dev_attr_arp_interval.attr,
 729         &dev_attr_arp_ip_target.attr,
 730         &dev_attr_downdelay.attr,
 731         &dev_attr_updelay.attr,
 732         &dev_attr_lacp_rate.attr,
 733         &dev_attr_ad_select.attr,
 734         &dev_attr_xmit_hash_policy.attr,
 735         &dev_attr_num_grat_arp.attr,
 736         &dev_attr_num_unsol_na.attr,
 737         &dev_attr_miimon.attr,
 738         &dev_attr_primary.attr,
 739         &dev_attr_primary_reselect.attr,
 740         &dev_attr_use_carrier.attr,
 741         &dev_attr_active_slave.attr,
 742         &dev_attr_mii_status.attr,
 743         &dev_attr_ad_aggregator.attr,
 744         &dev_attr_ad_num_ports.attr,
 745         &dev_attr_ad_actor_key.attr,
 746         &dev_attr_ad_partner_key.attr,
 747         &dev_attr_ad_partner_mac.attr,
 748         &dev_attr_queue_id.attr,
 749         &dev_attr_all_slaves_active.attr,
 750         &dev_attr_resend_igmp.attr,
 751         &dev_attr_min_links.attr,
 752         &dev_attr_lp_interval.attr,
 753         &dev_attr_packets_per_slave.attr,
 754         &dev_attr_tlb_dynamic_lb.attr,
 755         &dev_attr_ad_actor_sys_prio.attr,
 756         &dev_attr_ad_actor_system.attr,
 757         &dev_attr_ad_user_port_key.attr,
 758         NULL,
 759 };
 760
 761 static const struct attribute_group bonding_group = {
 762         .name = "bonding",
 763         .attrs = per_bond_attrs,
 764 };
 765
 766 /* Initialize sysfs.  This sets up the bonding_masters file in
 767  * /sys/class/net.
 768  */
 769 int bond_create_sysfs(struct bond_net *bn)
 770 {
 771         int ret;
 772
 773         bn->class_attr_bonding_masters = class_attr_bonding_masters;
 774         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
 775
 776         ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
 777                                           bn->net);
 778         /* Permit multiple loads of the module by ignoring failures to
 779          * create the bonding_masters sysfs file.  Bonding devices
 780          * created by second or subsequent loads of the module will
 781          * not be listed in, or controllable by, bonding_masters, but
 782          * will have the usual "bonding" sysfs directory.
 783          *
 784          * This is done to preserve backwards compatibility for
 785          * initscripts/sysconfig, which load bonding multiple times to
 786          * configure multiple bonding devices.
 787          */
 788         if (ret == -EEXIST) {
 789                 /* Is someone being kinky and naming a device bonding_master? */
 790                 if (__dev_get_by_name(bn->net,
 791                                       class_attr_bonding_masters.attr.name))
 792                         pr_err("network device named %s already exists in sysfs\n",
 793                                class_attr_bonding_masters.attr.name);
 794                 ret = 0;
 795         }
 796
 797         return ret;
 798
 799 }
 800
 801 /* Remove /sys/class/net/bonding_masters. */
 802 void bond_destroy_sysfs(struct bond_net *bn)
 803 {
 804         netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
 805 }
 806
 807 /* Initialize sysfs for each bond.  This sets up and registers
 808  * the 'bondctl' directory for each individual bond under /sys/class/net.
 809  */
 810 void bond_prepare_sysfs_group(struct bonding *bond)
 811 {
 812         bond->dev->sysfs_groups[0] = &bonding_group;
 813 }
 814