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 = S_IWUSR | S_IRUGO,
 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, S_IRUGO | S_IWUSR, 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, S_IRUGO | S_IWUSR,
 220                    bonding_show_mode, bonding_sysfs_store_option);
 221
 222 /* Show the bonding transmit hash method. */
 223 static ssize_t bonding_show_xmit_hash(struct device *d,
 224                                       struct device_attribute *attr,
 225                                       char *buf)
 226 {
 227         struct bonding *bond = to_bond(d);
 228         const struct bond_opt_value *val;
 229
 230         val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
 231
 232         return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
 233 }
 234 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 235                    bonding_show_xmit_hash, bonding_sysfs_store_option);
 236
 237 /* Show arp_validate. */
 238 static ssize_t bonding_show_arp_validate(struct device *d,
 239                                          struct device_attribute *attr,
 240                                          char *buf)
 241 {
 242         struct bonding *bond = to_bond(d);
 243         const struct bond_opt_value *val;
 244
 245         val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
 246                                bond->params.arp_validate);
 247
 248         return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
 249 }
 250 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 251                    bonding_sysfs_store_option);
 252
 253 /* Show arp_all_targets. */
 254 static ssize_t bonding_show_arp_all_targets(struct device *d,
 255                                          struct device_attribute *attr,
 256                                          char *buf)
 257 {
 258         struct bonding *bond = to_bond(d);
 259         const struct bond_opt_value *val;
 260
 261         val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
 262                                bond->params.arp_all_targets);
 263         return sprintf(buf, "%s %d\n",
 264                        val->string, bond->params.arp_all_targets);
 265 }
 266 static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
 267                    bonding_show_arp_all_targets, bonding_sysfs_store_option);
 268
 269 /* Show fail_over_mac. */
 270 static ssize_t bonding_show_fail_over_mac(struct device *d,
 271                                           struct device_attribute *attr,
 272                                           char *buf)
 273 {
 274         struct bonding *bond = to_bond(d);
 275         const struct bond_opt_value *val;
 276
 277         val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
 278                                bond->params.fail_over_mac);
 279
 280         return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
 281 }
 282 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 283                    bonding_show_fail_over_mac, bonding_sysfs_store_option);
 284
 285 /* Show the arp timer interval. */
 286 static ssize_t bonding_show_arp_interval(struct device *d,
 287                                          struct device_attribute *attr,
 288                                          char *buf)
 289 {
 290         struct bonding *bond = to_bond(d);
 291
 292         return sprintf(buf, "%d\n", bond->params.arp_interval);
 293 }
 294 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 295                    bonding_show_arp_interval, bonding_sysfs_store_option);
 296
 297 /* Show the arp targets. */
 298 static ssize_t bonding_show_arp_targets(struct device *d,
 299                                         struct device_attribute *attr,
 300                                         char *buf)
 301 {
 302         struct bonding *bond = to_bond(d);
 303         int i, res = 0;
 304
 305         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 306                 if (bond->params.arp_targets[i])
 307                         res += sprintf(buf + res, "%pI4 ",
 308                                        &bond->params.arp_targets[i]);
 309         }
 310         if (res)
 311                 buf[res-1] = '\n'; /* eat the leftover space */
 312
 313         return res;
 314 }
 315 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR,
 316                    bonding_show_arp_targets, bonding_sysfs_store_option);
 317
 318 /* Show the up and down delays. */
 319 static ssize_t bonding_show_downdelay(struct device *d,
 320                                       struct device_attribute *attr,
 321                                       char *buf)
 322 {
 323         struct bonding *bond = to_bond(d);
 324
 325         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 326 }
 327 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 328                    bonding_show_downdelay, bonding_sysfs_store_option);
 329
 330 static ssize_t bonding_show_updelay(struct device *d,
 331                                     struct device_attribute *attr,
 332                                     char *buf)
 333 {
 334         struct bonding *bond = to_bond(d);
 335
 336         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 337
 338 }
 339 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 340                    bonding_show_updelay, bonding_sysfs_store_option);
 341
 342 /* Show the LACP interval. */
 343 static ssize_t bonding_show_lacp(struct device *d,
 344                                  struct device_attribute *attr,
 345                                  char *buf)
 346 {
 347         struct bonding *bond = to_bond(d);
 348         const struct bond_opt_value *val;
 349
 350         val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
 351
 352         return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
 353 }
 354 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 355                    bonding_show_lacp, bonding_sysfs_store_option);
 356
 357 static ssize_t bonding_show_min_links(struct device *d,
 358                                       struct device_attribute *attr,
 359                                       char *buf)
 360 {
 361         struct bonding *bond = to_bond(d);
 362
 363         return sprintf(buf, "%u\n", bond->params.min_links);
 364 }
 365 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 366                    bonding_show_min_links, bonding_sysfs_store_option);
 367
 368 static ssize_t bonding_show_ad_select(struct device *d,
 369                                       struct device_attribute *attr,
 370                                       char *buf)
 371 {
 372         struct bonding *bond = to_bond(d);
 373         const struct bond_opt_value *val;
 374
 375         val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
 376
 377         return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
 378 }
 379 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 380                    bonding_show_ad_select, bonding_sysfs_store_option);
 381
 382 /* Show the number of peer notifications to send after a failover event. */
 383 static ssize_t bonding_show_num_peer_notif(struct device *d,
 384                                            struct device_attribute *attr,
 385                                            char *buf)
 386 {
 387         struct bonding *bond = to_bond(d);
 388         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 389 }
 390 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 391                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 392 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 393                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 394
 395 /* Show the MII monitor interval. */
 396 static ssize_t bonding_show_miimon(struct device *d,
 397                                    struct device_attribute *attr,
 398                                    char *buf)
 399 {
 400         struct bonding *bond = to_bond(d);
 401
 402         return sprintf(buf, "%d\n", bond->params.miimon);
 403 }
 404 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 405                    bonding_show_miimon, bonding_sysfs_store_option);
 406
 407 /* Show the primary slave. */
 408 static ssize_t bonding_show_primary(struct device *d,
 409                                     struct device_attribute *attr,
 410                                     char *buf)
 411 {
 412         struct bonding *bond = to_bond(d);
 413         struct slave *primary;
 414         int count = 0;
 415
 416         rcu_read_lock();
 417         primary = rcu_dereference(bond->primary_slave);
 418         if (primary)
 419                 count = sprintf(buf, "%s\n", primary->dev->name);
 420         rcu_read_unlock();
 421
 422         return count;
 423 }
 424 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
 425                    bonding_show_primary, bonding_sysfs_store_option);
 426
 427 /* Show the primary_reselect flag. */
 428 static ssize_t bonding_show_primary_reselect(struct device *d,
 429                                              struct device_attribute *attr,
 430                                              char *buf)
 431 {
 432         struct bonding *bond = to_bond(d);
 433         const struct bond_opt_value *val;
 434
 435         val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
 436                                bond->params.primary_reselect);
 437
 438         return sprintf(buf, "%s %d\n",
 439                        val->string, bond->params.primary_reselect);
 440 }
 441 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
 442                    bonding_show_primary_reselect, bonding_sysfs_store_option);
 443
 444 /* Show the use_carrier flag. */
 445 static ssize_t bonding_show_carrier(struct device *d,
 446                                     struct device_attribute *attr,
 447                                     char *buf)
 448 {
 449         struct bonding *bond = to_bond(d);
 450
 451         return sprintf(buf, "%d\n", bond->params.use_carrier);
 452 }
 453 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
 454                    bonding_show_carrier, bonding_sysfs_store_option);
 455
 456
 457 /* Show currently active_slave. */
 458 static ssize_t bonding_show_active_slave(struct device *d,
 459                                          struct device_attribute *attr,
 460                                          char *buf)
 461 {
 462         struct bonding *bond = to_bond(d);
 463         struct net_device *slave_dev;
 464         int count = 0;
 465
 466         rcu_read_lock();
 467         slave_dev = bond_option_active_slave_get_rcu(bond);
 468         if (slave_dev)
 469                 count = sprintf(buf, "%s\n", slave_dev->name);
 470         rcu_read_unlock();
 471
 472         return count;
 473 }
 474 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
 475                    bonding_show_active_slave, bonding_sysfs_store_option);
 476
 477 /* Show link status of the bond interface. */
 478 static ssize_t bonding_show_mii_status(struct device *d,
 479                                        struct device_attribute *attr,
 480                                        char *buf)
 481 {
 482         struct bonding *bond = to_bond(d);
 483         bool active = netif_carrier_ok(bond->dev);
 484
 485         return sprintf(buf, "%s\n", active ? "up" : "down");
 486 }
 487 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
 488
 489 /* Show current 802.3ad aggregator ID. */
 490 static ssize_t bonding_show_ad_aggregator(struct device *d,
 491                                           struct device_attribute *attr,
 492                                           char *buf)
 493 {
 494         int count = 0;
 495         struct bonding *bond = to_bond(d);
 496
 497         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 498                 struct ad_info ad_info;
 499                 count = sprintf(buf, "%d\n",
 500                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 501                                 ?  0 : ad_info.aggregator_id);
 502         }
 503
 504         return count;
 505 }
 506 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
 507
 508
 509 /* Show number of active 802.3ad ports. */
 510 static ssize_t bonding_show_ad_num_ports(struct device *d,
 511                                          struct device_attribute *attr,
 512                                          char *buf)
 513 {
 514         int count = 0;
 515         struct bonding *bond = to_bond(d);
 516
 517         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 518                 struct ad_info ad_info;
 519                 count = sprintf(buf, "%d\n",
 520                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 521                                 ?  0 : ad_info.ports);
 522         }
 523
 524         return count;
 525 }
 526 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
 527
 528
 529 /* Show current 802.3ad actor key. */
 530 static ssize_t bonding_show_ad_actor_key(struct device *d,
 531                                          struct device_attribute *attr,
 532                                          char *buf)
 533 {
 534         int count = 0;
 535         struct bonding *bond = to_bond(d);
 536
 537         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 538                 struct ad_info ad_info;
 539                 count = sprintf(buf, "%d\n",
 540                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 541                                 ?  0 : ad_info.actor_key);
 542         }
 543
 544         return count;
 545 }
 546 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
 547
 548
 549 /* Show current 802.3ad partner key. */
 550 static ssize_t bonding_show_ad_partner_key(struct device *d,
 551                                            struct device_attribute *attr,
 552                                            char *buf)
 553 {
 554         int count = 0;
 555         struct bonding *bond = to_bond(d);
 556
 557         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 558                 struct ad_info ad_info;
 559                 count = sprintf(buf, "%d\n",
 560                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 561                                 ?  0 : ad_info.partner_key);
 562         }
 563
 564         return count;
 565 }
 566 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
 567
 568
 569 /* Show current 802.3ad partner mac. */
 570 static ssize_t bonding_show_ad_partner_mac(struct device *d,
 571                                            struct device_attribute *attr,
 572                                            char *buf)
 573 {
 574         int count = 0;
 575         struct bonding *bond = to_bond(d);
 576
 577         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 578                 struct ad_info ad_info;
 579                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
 580                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
 581         }
 582
 583         return count;
 584 }
 585 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
 586
 587 /* Show the queue_ids of the slaves in the current bond. */
 588 static ssize_t bonding_show_queue_id(struct device *d,
 589                                      struct device_attribute *attr,
 590                                      char *buf)
 591 {
 592         struct bonding *bond = to_bond(d);
 593         struct list_head *iter;
 594         struct slave *slave;
 595         int res = 0;
 596
 597         if (!rtnl_trylock())
 598                 return restart_syscall();
 599
 600         bond_for_each_slave(bond, slave, iter) {
 601                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
 602                         /* not enough space for another interface_name:queue_id pair */
 603                         if ((PAGE_SIZE - res) > 10)
 604                                 res = PAGE_SIZE - 10;
 605                         res += sprintf(buf + res, "++more++ ");
 606                         break;
 607                 }
 608                 res += sprintf(buf + res, "%s:%d ",
 609                                slave->dev->name, slave->queue_id);
 610         }
 611         if (res)
 612                 buf[res-1] = '\n'; /* eat the leftover space */
 613
 614         rtnl_unlock();
 615
 616         return res;
 617 }
 618 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
 619                    bonding_sysfs_store_option);
 620
 621
 622 /* Show the all_slaves_active flag. */
 623 static ssize_t bonding_show_slaves_active(struct device *d,
 624                                           struct device_attribute *attr,
 625                                           char *buf)
 626 {
 627         struct bonding *bond = to_bond(d);
 628
 629         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
 630 }
 631 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
 632                    bonding_show_slaves_active, bonding_sysfs_store_option);
 633
 634 /* Show the number of IGMP membership reports to send on link failure */
 635 static ssize_t bonding_show_resend_igmp(struct device *d,
 636                                         struct device_attribute *attr,
 637                                         char *buf)
 638 {
 639         struct bonding *bond = to_bond(d);
 640
 641         return sprintf(buf, "%d\n", bond->params.resend_igmp);
 642 }
 643 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
 644                    bonding_show_resend_igmp, bonding_sysfs_store_option);
 645
 646
 647 static ssize_t bonding_show_lp_interval(struct device *d,
 648                                         struct device_attribute *attr,
 649                                         char *buf)
 650 {
 651         struct bonding *bond = to_bond(d);
 652
 653         return sprintf(buf, "%d\n", bond->params.lp_interval);
 654 }
 655 static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
 656                    bonding_show_lp_interval, bonding_sysfs_store_option);
 657
 658 static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
 659                                            struct device_attribute *attr,
 660                                            char *buf)
 661 {
 662         struct bonding *bond = to_bond(d);
 663         return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
 664 }
 665 static DEVICE_ATTR(tlb_dynamic_lb, S_IRUGO | S_IWUSR,
 666                    bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
 667
 668 static ssize_t bonding_show_packets_per_slave(struct device *d,
 669                                               struct device_attribute *attr,
 670                                               char *buf)
 671 {
 672         struct bonding *bond = to_bond(d);
 673         unsigned int packets_per_slave = bond->params.packets_per_slave;
 674
 675         return sprintf(buf, "%u\n", packets_per_slave);
 676 }
 677 static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
 678                    bonding_show_packets_per_slave, bonding_sysfs_store_option);
 679
 680 static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
 681                                               struct device_attribute *attr,
 682                                               char *buf)
 683 {
 684         struct bonding *bond = to_bond(d);
 685
 686         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 687                 return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
 688
 689         return 0;
 690 }
 691 static DEVICE_ATTR(ad_actor_sys_prio, S_IRUGO | S_IWUSR,
 692                    bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
 693
 694 static ssize_t bonding_show_ad_actor_system(struct device *d,
 695                                             struct device_attribute *attr,
 696                                             char *buf)
 697 {
 698         struct bonding *bond = to_bond(d);
 699
 700         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 701                 return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
 702
 703         return 0;
 704 }
 705
 706 static DEVICE_ATTR(ad_actor_system, S_IRUGO | S_IWUSR,
 707                    bonding_show_ad_actor_system, bonding_sysfs_store_option);
 708
 709 static ssize_t bonding_show_ad_user_port_key(struct device *d,
 710                                              struct device_attribute *attr,
 711                                              char *buf)
 712 {
 713         struct bonding *bond = to_bond(d);
 714
 715         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 716                 return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
 717
 718         return 0;
 719 }
 720 static DEVICE_ATTR(ad_user_port_key, S_IRUGO | S_IWUSR,
 721                    bonding_show_ad_user_port_key, bonding_sysfs_store_option);
 722
 723 static struct attribute *per_bond_attrs[] = {
 724         &dev_attr_slaves.attr,
 725         &dev_attr_mode.attr,
 726         &dev_attr_fail_over_mac.attr,
 727         &dev_attr_arp_validate.attr,
 728         &dev_attr_arp_all_targets.attr,
 729         &dev_attr_arp_interval.attr,
 730         &dev_attr_arp_ip_target.attr,
 731         &dev_attr_downdelay.attr,
 732         &dev_attr_updelay.attr,
 733         &dev_attr_lacp_rate.attr,
 734         &dev_attr_ad_select.attr,
 735         &dev_attr_xmit_hash_policy.attr,
 736         &dev_attr_num_grat_arp.attr,
 737         &dev_attr_num_unsol_na.attr,
 738         &dev_attr_miimon.attr,
 739         &dev_attr_primary.attr,
 740         &dev_attr_primary_reselect.attr,
 741         &dev_attr_use_carrier.attr,
 742         &dev_attr_active_slave.attr,
 743         &dev_attr_mii_status.attr,
 744         &dev_attr_ad_aggregator.attr,
 745         &dev_attr_ad_num_ports.attr,
 746         &dev_attr_ad_actor_key.attr,
 747         &dev_attr_ad_partner_key.attr,
 748         &dev_attr_ad_partner_mac.attr,
 749         &dev_attr_queue_id.attr,
 750         &dev_attr_all_slaves_active.attr,
 751         &dev_attr_resend_igmp.attr,
 752         &dev_attr_min_links.attr,
 753         &dev_attr_lp_interval.attr,
 754         &dev_attr_packets_per_slave.attr,
 755         &dev_attr_tlb_dynamic_lb.attr,
 756         &dev_attr_ad_actor_sys_prio.attr,
 757         &dev_attr_ad_actor_system.attr,
 758         &dev_attr_ad_user_port_key.attr,
 759         NULL,
 760 };
 761
 762 static struct attribute_group bonding_group = {
 763         .name = "bonding",
 764         .attrs = per_bond_attrs,
 765 };
 766
 767 /* Initialize sysfs.  This sets up the bonding_masters file in
 768  * /sys/class/net.
 769  */
 770 int bond_create_sysfs(struct bond_net *bn)
 771 {
 772         int ret;
 773
 774         bn->class_attr_bonding_masters = class_attr_bonding_masters;
 775         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
 776
 777         ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
 778                                           bn->net);
 779         /* Permit multiple loads of the module by ignoring failures to
 780          * create the bonding_masters sysfs file.  Bonding devices
 781          * created by second or subsequent loads of the module will
 782          * not be listed in, or controllable by, bonding_masters, but
 783          * will have the usual "bonding" sysfs directory.
 784          *
 785          * This is done to preserve backwards compatibility for
 786          * initscripts/sysconfig, which load bonding multiple times to
 787          * configure multiple bonding devices.
 788          */
 789         if (ret == -EEXIST) {
 790                 /* Is someone being kinky and naming a device bonding_master? */
 791                 if (__dev_get_by_name(bn->net,
 792                                       class_attr_bonding_masters.attr.name))
 793                         pr_err("network device named %s already exists in sysfs\n",
 794                                class_attr_bonding_masters.attr.name);
 795                 ret = 0;
 796         }
 797
 798         return ret;
 799
 800 }
 801
 802 /* Remove /sys/class/net/bonding_masters. */
 803 void bond_destroy_sysfs(struct bond_net *bn)
 804 {
 805         netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
 806 }
 807
 808 /* Initialize sysfs for each bond.  This sets up and registers
 809  * the 'bondctl' directory for each individual bond under /sys/class/net.
 810  */
 811 void bond_prepare_sysfs_group(struct bonding *bond)
 812 {
 813         bond->dev->sysfs_groups[0] = &bonding_group;
 814 }
 815