drivers/net/bonding/bond_sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  */
   5
   6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   7
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/device.h>
  11 #include <linux/sched/signal.h>
  12 #include <linux/fs.h>
  13 #include <linux/types.h>
  14 #include <linux/string.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/inetdevice.h>
  17 #include <linux/in.h>
  18 #include <linux/sysfs.h>
  19 #include <linux/ctype.h>
  20 #include <linux/inet.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/etherdevice.h>
  23 #include <net/net_namespace.h>
  24 #include <net/netns/generic.h>
  25 #include <linux/nsproxy.h>
  26
  27 #include <net/bonding.h>
  28
  29 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  30
  31 /* "show" function for the bond_masters attribute.
  32  * The class parameter is ignored.
  33  */
  34 static ssize_t bonding_show_bonds(struct class *cls,
  35                                   struct class_attribute *attr,
  36                                   char *buf)
  37 {
  38         struct bond_net *bn =
  39                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  40         int res = 0;
  41         struct bonding *bond;
  42
  43         rtnl_lock();
  44
  45         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  46                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  47                         /* not enough space for another interface name */
  48                         if ((PAGE_SIZE - res) > 10)
  49                                 res = PAGE_SIZE - 10;
  50                         res += sprintf(buf + res, "++more++ ");
  51                         break;
  52                 }
  53                 res += sprintf(buf + res, "%s ", bond->dev->name);
  54         }
  55         if (res)
  56                 buf[res-1] = '\n'; /* eat the leftover space */
  57
  58         rtnl_unlock();
  59         return res;
  60 }
  61
  62 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  63 {
  64         struct bonding *bond;
  65
  66         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  67                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  68                         return bond->dev;
  69         }
  70         return NULL;
  71 }
  72
  73 /* "store" function for the bond_masters attribute.  This is what
  74  * creates and deletes entire bonds.
  75  *
  76  * The class parameter is ignored.
  77  */
  78 static ssize_t bonding_store_bonds(struct class *cls,
  79                                    struct class_attribute *attr,
  80                                    const char *buffer, size_t count)
  81 {
  82         struct bond_net *bn =
  83                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  84         char command[IFNAMSIZ + 1] = {0, };
  85         char *ifname;
  86         int rv, res = count;
  87
  88         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
  89         ifname = command + 1;
  90         if ((strlen(command) <= 1) ||
  91             !dev_valid_name(ifname))
  92                 goto err_no_cmd;
  93
  94         if (command[0] == '+') {
  95                 pr_info("%s is being created...\n", ifname);
  96                 rv = bond_create(bn->net, ifname);
  97                 if (rv) {
  98                         if (rv == -EEXIST)
  99                                 pr_info("%s already exists\n", ifname);
 100                         else
 101                                 pr_info("%s creation failed\n", ifname);
 102                         res = rv;
 103                 }
 104         } else if (command[0] == '-') {
 105                 struct net_device *bond_dev;
 106
 107                 rtnl_lock();
 108                 bond_dev = bond_get_by_name(bn, ifname);
 109                 if (bond_dev) {
 110                         pr_info("%s is being deleted...\n", ifname);
 111                         unregister_netdevice(bond_dev);
 112                 } else {
 113                         pr_err("unable to delete non-existent %s\n", ifname);
 114                         res = -ENODEV;
 115                 }
 116                 rtnl_unlock();
 117         } else
 118                 goto err_no_cmd;
 119
 120         /* Always return either count or an error.  If you return 0, you'll
 121          * get called forever, which is bad.
 122          */
 123         return res;
 124
 125 err_no_cmd:
 126         pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
 127         return -EPERM;
 128 }
 129
 130 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 131 static const struct class_attribute class_attr_bonding_masters = {
 132         .attr = {
 133                 .name = "bonding_masters",
 134                 .mode = 0644,
 135         },
 136         .show = bonding_show_bonds,
 137         .store = bonding_store_bonds,
 138 };
 139
 140 /* Generic "store" method for bonding sysfs option setting */
 141 static ssize_t bonding_sysfs_store_option(struct device *d,
 142                                           struct device_attribute *attr,
 143                                           const char *buffer, size_t count)
 144 {
 145         struct bonding *bond = to_bond(d);
 146         const struct bond_option *opt;
 147         char *buffer_clone;
 148         int ret;
 149
 150         opt = bond_opt_get_by_name(attr->attr.name);
 151         if (WARN_ON(!opt))
 152                 return -ENOENT;
 153         buffer_clone = kstrndup(buffer, count, GFP_KERNEL);
 154         if (!buffer_clone)
 155                 return -ENOMEM;
 156         ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone);
 157         if (!ret)
 158                 ret = count;
 159         kfree(buffer_clone);
 160
 161         return ret;
 162 }
 163
 164 /* Show the slaves in the current bond. */
 165 static ssize_t bonding_show_slaves(struct device *d,
 166                                    struct device_attribute *attr, char *buf)
 167 {
 168         struct bonding *bond = to_bond(d);
 169         struct list_head *iter;
 170         struct slave *slave;
 171         int res = 0;
 172
 173         if (!rtnl_trylock())
 174                 return restart_syscall();
 175
 176         bond_for_each_slave(bond, slave, iter) {
 177                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 178                         /* not enough space for another interface name */
 179                         if ((PAGE_SIZE - res) > 10)
 180                                 res = PAGE_SIZE - 10;
 181                         res += sprintf(buf + res, "++more++ ");
 182                         break;
 183                 }
 184                 res += sprintf(buf + res, "%s ", slave->dev->name);
 185         }
 186
 187         rtnl_unlock();
 188
 189         if (res)
 190                 buf[res-1] = '\n'; /* eat the leftover space */
 191
 192         return res;
 193 }
 194 static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
 195                    bonding_sysfs_store_option);
 196
 197 /* Show the bonding mode. */
 198 static ssize_t bonding_show_mode(struct device *d,
 199                                  struct device_attribute *attr, char *buf)
 200 {
 201         struct bonding *bond = to_bond(d);
 202         const struct bond_opt_value *val;
 203
 204         val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
 205
 206         return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond));
 207 }
 208 static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
 209
 210 /* Show the bonding transmit hash method. */
 211 static ssize_t bonding_show_xmit_hash(struct device *d,
 212                                       struct device_attribute *attr,
 213                                       char *buf)
 214 {
 215         struct bonding *bond = to_bond(d);
 216         const struct bond_opt_value *val;
 217
 218         val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
 219
 220         return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
 221 }
 222 static DEVICE_ATTR(xmit_hash_policy, 0644,
 223                    bonding_show_xmit_hash, bonding_sysfs_store_option);
 224
 225 /* Show arp_validate. */
 226 static ssize_t bonding_show_arp_validate(struct device *d,
 227                                          struct device_attribute *attr,
 228                                          char *buf)
 229 {
 230         struct bonding *bond = to_bond(d);
 231         const struct bond_opt_value *val;
 232
 233         val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
 234                                bond->params.arp_validate);
 235
 236         return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
 237 }
 238 static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
 239                    bonding_sysfs_store_option);
 240
 241 /* Show arp_all_targets. */
 242 static ssize_t bonding_show_arp_all_targets(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_ALL_TARGETS,
 250                                bond->params.arp_all_targets);
 251         return sprintf(buf, "%s %d\n",
 252                        val->string, bond->params.arp_all_targets);
 253 }
 254 static DEVICE_ATTR(arp_all_targets, 0644,
 255                    bonding_show_arp_all_targets, bonding_sysfs_store_option);
 256
 257 /* Show fail_over_mac. */
 258 static ssize_t bonding_show_fail_over_mac(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_FAIL_OVER_MAC,
 266                                bond->params.fail_over_mac);
 267
 268         return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
 269 }
 270 static DEVICE_ATTR(fail_over_mac, 0644,
 271                    bonding_show_fail_over_mac, bonding_sysfs_store_option);
 272
 273 /* Show the arp timer interval. */
 274 static ssize_t bonding_show_arp_interval(struct device *d,
 275                                          struct device_attribute *attr,
 276                                          char *buf)
 277 {
 278         struct bonding *bond = to_bond(d);
 279
 280         return sprintf(buf, "%d\n", bond->params.arp_interval);
 281 }
 282 static DEVICE_ATTR(arp_interval, 0644,
 283                    bonding_show_arp_interval, bonding_sysfs_store_option);
 284
 285 /* Show the arp targets. */
 286 static ssize_t bonding_show_arp_targets(struct device *d,
 287                                         struct device_attribute *attr,
 288                                         char *buf)
 289 {
 290         struct bonding *bond = to_bond(d);
 291         int i, res = 0;
 292
 293         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 294                 if (bond->params.arp_targets[i])
 295                         res += sprintf(buf + res, "%pI4 ",
 296                                        &bond->params.arp_targets[i]);
 297         }
 298         if (res)
 299                 buf[res-1] = '\n'; /* eat the leftover space */
 300
 301         return res;
 302 }
 303 static DEVICE_ATTR(arp_ip_target, 0644,
 304                    bonding_show_arp_targets, bonding_sysfs_store_option);
 305
 306 /* Show the up and down delays. */
 307 static ssize_t bonding_show_downdelay(struct device *d,
 308                                       struct device_attribute *attr,
 309                                       char *buf)
 310 {
 311         struct bonding *bond = to_bond(d);
 312
 313         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 314 }
 315 static DEVICE_ATTR(downdelay, 0644,
 316                    bonding_show_downdelay, bonding_sysfs_store_option);
 317
 318 static ssize_t bonding_show_updelay(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.updelay * bond->params.miimon);
 325
 326 }
 327 static DEVICE_ATTR(updelay, 0644,
 328                    bonding_show_updelay, bonding_sysfs_store_option);
 329
 330 /* Show the LACP interval. */
 331 static ssize_t bonding_show_lacp(struct device *d,
 332                                  struct device_attribute *attr,
 333                                  char *buf)
 334 {
 335         struct bonding *bond = to_bond(d);
 336         const struct bond_opt_value *val;
 337
 338         val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
 339
 340         return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
 341 }
 342 static DEVICE_ATTR(lacp_rate, 0644,
 343                    bonding_show_lacp, bonding_sysfs_store_option);
 344
 345 static ssize_t bonding_show_min_links(struct device *d,
 346                                       struct device_attribute *attr,
 347                                       char *buf)
 348 {
 349         struct bonding *bond = to_bond(d);
 350
 351         return sprintf(buf, "%u\n", bond->params.min_links);
 352 }
 353 static DEVICE_ATTR(min_links, 0644,
 354                    bonding_show_min_links, bonding_sysfs_store_option);
 355
 356 static ssize_t bonding_show_ad_select(struct device *d,
 357                                       struct device_attribute *attr,
 358                                       char *buf)
 359 {
 360         struct bonding *bond = to_bond(d);
 361         const struct bond_opt_value *val;
 362
 363         val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
 364
 365         return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
 366 }
 367 static DEVICE_ATTR(ad_select, 0644,
 368                    bonding_show_ad_select, bonding_sysfs_store_option);
 369
 370 /* Show the number of peer notifications to send after a failover event. */
 371 static ssize_t bonding_show_num_peer_notif(struct device *d,
 372                                            struct device_attribute *attr,
 373                                            char *buf)
 374 {
 375         struct bonding *bond = to_bond(d);
 376         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 377 }
 378 static DEVICE_ATTR(num_grat_arp, 0644,
 379                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 380 static DEVICE_ATTR(num_unsol_na, 0644,
 381                    bonding_show_num_peer_notif, bonding_sysfs_store_option);
 382
 383 /* Show the MII monitor interval. */
 384 static ssize_t bonding_show_miimon(struct device *d,
 385                                    struct device_attribute *attr,
 386                                    char *buf)
 387 {
 388         struct bonding *bond = to_bond(d);
 389
 390         return sprintf(buf, "%d\n", bond->params.miimon);
 391 }
 392 static DEVICE_ATTR(miimon, 0644,
 393                    bonding_show_miimon, bonding_sysfs_store_option);
 394
 395 /* Show the primary slave. */
 396 static ssize_t bonding_show_primary(struct device *d,
 397                                     struct device_attribute *attr,
 398                                     char *buf)
 399 {
 400         struct bonding *bond = to_bond(d);
 401         struct slave *primary;
 402         int count = 0;
 403
 404         rcu_read_lock();
 405         primary = rcu_dereference(bond->primary_slave);
 406         if (primary)
 407                 count = sprintf(buf, "%s\n", primary->dev->name);
 408         rcu_read_unlock();
 409
 410         return count;
 411 }
 412 static DEVICE_ATTR(primary, 0644,
 413                    bonding_show_primary, bonding_sysfs_store_option);
 414
 415 /* Show the primary_reselect flag. */
 416 static ssize_t bonding_show_primary_reselect(struct device *d,
 417                                              struct device_attribute *attr,
 418                                              char *buf)
 419 {
 420         struct bonding *bond = to_bond(d);
 421         const struct bond_opt_value *val;
 422
 423         val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
 424                                bond->params.primary_reselect);
 425
 426         return sprintf(buf, "%s %d\n",
 427                        val->string, bond->params.primary_reselect);
 428 }
 429 static DEVICE_ATTR(primary_reselect, 0644,
 430                    bonding_show_primary_reselect, bonding_sysfs_store_option);
 431
 432 /* Show the use_carrier flag. */
 433 static ssize_t bonding_show_carrier(struct device *d,
 434                                     struct device_attribute *attr,
 435                                     char *buf)
 436 {
 437         struct bonding *bond = to_bond(d);
 438
 439         return sprintf(buf, "%d\n", bond->params.use_carrier);
 440 }
 441 static DEVICE_ATTR(use_carrier, 0644,
 442                    bonding_show_carrier, bonding_sysfs_store_option);
 443
 444
 445 /* Show currently active_slave. */
 446 static ssize_t bonding_show_active_slave(struct device *d,
 447                                          struct device_attribute *attr,
 448                                          char *buf)
 449 {
 450         struct bonding *bond = to_bond(d);
 451         struct net_device *slave_dev;
 452         int count = 0;
 453
 454         rcu_read_lock();
 455         slave_dev = bond_option_active_slave_get_rcu(bond);
 456         if (slave_dev)
 457                 count = sprintf(buf, "%s\n", slave_dev->name);
 458         rcu_read_unlock();
 459
 460         return count;
 461 }
 462 static DEVICE_ATTR(active_slave, 0644,
 463                    bonding_show_active_slave, bonding_sysfs_store_option);
 464
 465 /* Show link status of the bond interface. */
 466 static ssize_t bonding_show_mii_status(struct device *d,
 467                                        struct device_attribute *attr,
 468                                        char *buf)
 469 {
 470         struct bonding *bond = to_bond(d);
 471         bool active = netif_carrier_ok(bond->dev);
 472
 473         return sprintf(buf, "%s\n", active ? "up" : "down");
 474 }
 475 static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
 476
 477 /* Show current 802.3ad aggregator ID. */
 478 static ssize_t bonding_show_ad_aggregator(struct device *d,
 479                                           struct device_attribute *attr,
 480                                           char *buf)
 481 {
 482         int count = 0;
 483         struct bonding *bond = to_bond(d);
 484
 485         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 486                 struct ad_info ad_info;
 487                 count = sprintf(buf, "%d\n",
 488                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 489                                 ?  0 : ad_info.aggregator_id);
 490         }
 491
 492         return count;
 493 }
 494 static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
 495
 496
 497 /* Show number of active 802.3ad ports. */
 498 static ssize_t bonding_show_ad_num_ports(struct device *d,
 499                                          struct device_attribute *attr,
 500                                          char *buf)
 501 {
 502         int count = 0;
 503         struct bonding *bond = to_bond(d);
 504
 505         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 506                 struct ad_info ad_info;
 507                 count = sprintf(buf, "%d\n",
 508                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 509                                 ?  0 : ad_info.ports);
 510         }
 511
 512         return count;
 513 }
 514 static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
 515
 516
 517 /* Show current 802.3ad actor key. */
 518 static ssize_t bonding_show_ad_actor_key(struct device *d,
 519                                          struct device_attribute *attr,
 520                                          char *buf)
 521 {
 522         int count = 0;
 523         struct bonding *bond = to_bond(d);
 524
 525         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 526                 struct ad_info ad_info;
 527                 count = sprintf(buf, "%d\n",
 528                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 529                                 ?  0 : ad_info.actor_key);
 530         }
 531
 532         return count;
 533 }
 534 static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
 535
 536
 537 /* Show current 802.3ad partner key. */
 538 static ssize_t bonding_show_ad_partner_key(struct device *d,
 539                                            struct device_attribute *attr,
 540                                            char *buf)
 541 {
 542         int count = 0;
 543         struct bonding *bond = to_bond(d);
 544
 545         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 546                 struct ad_info ad_info;
 547                 count = sprintf(buf, "%d\n",
 548                                 bond_3ad_get_active_agg_info(bond, &ad_info)
 549                                 ?  0 : ad_info.partner_key);
 550         }
 551
 552         return count;
 553 }
 554 static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
 555
 556
 557 /* Show current 802.3ad partner mac. */
 558 static ssize_t bonding_show_ad_partner_mac(struct device *d,
 559                                            struct device_attribute *attr,
 560                                            char *buf)
 561 {
 562         int count = 0;
 563         struct bonding *bond = to_bond(d);
 564
 565         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
 566                 struct ad_info ad_info;
 567                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
 568                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
 569         }
 570
 571         return count;
 572 }
 573 static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
 574
 575 /* Show the queue_ids of the slaves in the current bond. */
 576 static ssize_t bonding_show_queue_id(struct device *d,
 577                                      struct device_attribute *attr,
 578                                      char *buf)
 579 {
 580         struct bonding *bond = to_bond(d);
 581         struct list_head *iter;
 582         struct slave *slave;
 583         int res = 0;
 584
 585         if (!rtnl_trylock())
 586                 return restart_syscall();
 587
 588         bond_for_each_slave(bond, slave, iter) {
 589                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
 590                         /* not enough space for another interface_name:queue_id pair */
 591                         if ((PAGE_SIZE - res) > 10)
 592                                 res = PAGE_SIZE - 10;
 593                         res += sprintf(buf + res, "++more++ ");
 594                         break;
 595                 }
 596                 res += sprintf(buf + res, "%s:%d ",
 597                                slave->dev->name, slave->queue_id);
 598         }
 599         if (res)
 600                 buf[res-1] = '\n'; /* eat the leftover space */
 601
 602         rtnl_unlock();
 603
 604         return res;
 605 }
 606 static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
 607                    bonding_sysfs_store_option);
 608
 609
 610 /* Show the all_slaves_active flag. */
 611 static ssize_t bonding_show_slaves_active(struct device *d,
 612                                           struct device_attribute *attr,
 613                                           char *buf)
 614 {
 615         struct bonding *bond = to_bond(d);
 616
 617         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
 618 }
 619 static DEVICE_ATTR(all_slaves_active, 0644,
 620                    bonding_show_slaves_active, bonding_sysfs_store_option);
 621
 622 /* Show the number of IGMP membership reports to send on link failure */
 623 static ssize_t bonding_show_resend_igmp(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.resend_igmp);
 630 }
 631 static DEVICE_ATTR(resend_igmp, 0644,
 632                    bonding_show_resend_igmp, bonding_sysfs_store_option);
 633
 634
 635 static ssize_t bonding_show_lp_interval(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.lp_interval);
 642 }
 643 static DEVICE_ATTR(lp_interval, 0644,
 644                    bonding_show_lp_interval, bonding_sysfs_store_option);
 645
 646 static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
 647                                            struct device_attribute *attr,
 648                                            char *buf)
 649 {
 650         struct bonding *bond = to_bond(d);
 651         return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
 652 }
 653 static DEVICE_ATTR(tlb_dynamic_lb, 0644,
 654                    bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
 655
 656 static ssize_t bonding_show_packets_per_slave(struct device *d,
 657                                               struct device_attribute *attr,
 658                                               char *buf)
 659 {
 660         struct bonding *bond = to_bond(d);
 661         unsigned int packets_per_slave = bond->params.packets_per_slave;
 662
 663         return sprintf(buf, "%u\n", packets_per_slave);
 664 }
 665 static DEVICE_ATTR(packets_per_slave, 0644,
 666                    bonding_show_packets_per_slave, bonding_sysfs_store_option);
 667
 668 static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
 669                                               struct device_attribute *attr,
 670                                               char *buf)
 671 {
 672         struct bonding *bond = to_bond(d);
 673
 674         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 675                 return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
 676
 677         return 0;
 678 }
 679 static DEVICE_ATTR(ad_actor_sys_prio, 0644,
 680                    bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
 681
 682 static ssize_t bonding_show_ad_actor_system(struct device *d,
 683                                             struct device_attribute *attr,
 684                                             char *buf)
 685 {
 686         struct bonding *bond = to_bond(d);
 687
 688         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 689                 return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
 690
 691         return 0;
 692 }
 693
 694 static DEVICE_ATTR(ad_actor_system, 0644,
 695                    bonding_show_ad_actor_system, bonding_sysfs_store_option);
 696
 697 static ssize_t bonding_show_ad_user_port_key(struct device *d,
 698                                              struct device_attribute *attr,
 699                                              char *buf)
 700 {
 701         struct bonding *bond = to_bond(d);
 702
 703         if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
 704                 return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
 705
 706         return 0;
 707 }
 708 static DEVICE_ATTR(ad_user_port_key, 0644,
 709                    bonding_show_ad_user_port_key, bonding_sysfs_store_option);
 710
 711 static struct attribute *per_bond_attrs[] = {
 712         &dev_attr_slaves.attr,
 713         &dev_attr_mode.attr,
 714         &dev_attr_fail_over_mac.attr,
 715         &dev_attr_arp_validate.attr,
 716         &dev_attr_arp_all_targets.attr,
 717         &dev_attr_arp_interval.attr,
 718         &dev_attr_arp_ip_target.attr,
 719         &dev_attr_downdelay.attr,
 720         &dev_attr_updelay.attr,
 721         &dev_attr_lacp_rate.attr,
 722         &dev_attr_ad_select.attr,
 723         &dev_attr_xmit_hash_policy.attr,
 724         &dev_attr_num_grat_arp.attr,
 725         &dev_attr_num_unsol_na.attr,
 726         &dev_attr_miimon.attr,
 727         &dev_attr_primary.attr,
 728         &dev_attr_primary_reselect.attr,
 729         &dev_attr_use_carrier.attr,
 730         &dev_attr_active_slave.attr,
 731         &dev_attr_mii_status.attr,
 732         &dev_attr_ad_aggregator.attr,
 733         &dev_attr_ad_num_ports.attr,
 734         &dev_attr_ad_actor_key.attr,
 735         &dev_attr_ad_partner_key.attr,
 736         &dev_attr_ad_partner_mac.attr,
 737         &dev_attr_queue_id.attr,
 738         &dev_attr_all_slaves_active.attr,
 739         &dev_attr_resend_igmp.attr,
 740         &dev_attr_min_links.attr,
 741         &dev_attr_lp_interval.attr,
 742         &dev_attr_packets_per_slave.attr,
 743         &dev_attr_tlb_dynamic_lb.attr,
 744         &dev_attr_ad_actor_sys_prio.attr,
 745         &dev_attr_ad_actor_system.attr,
 746         &dev_attr_ad_user_port_key.attr,
 747         NULL,
 748 };
 749
 750 static const struct attribute_group bonding_group = {
 751         .name = "bonding",
 752         .attrs = per_bond_attrs,
 753 };
 754
 755 /* Initialize sysfs.  This sets up the bonding_masters file in
 756  * /sys/class/net.
 757  */
 758 int bond_create_sysfs(struct bond_net *bn)
 759 {
 760         int ret;
 761
 762         bn->class_attr_bonding_masters = class_attr_bonding_masters;
 763         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
 764
 765         ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
 766                                           bn->net);
 767         /* Permit multiple loads of the module by ignoring failures to
 768          * create the bonding_masters sysfs file.  Bonding devices
 769          * created by second or subsequent loads of the module will
 770          * not be listed in, or controllable by, bonding_masters, but
 771          * will have the usual "bonding" sysfs directory.
 772          *
 773          * This is done to preserve backwards compatibility for
 774          * initscripts/sysconfig, which load bonding multiple times to
 775          * configure multiple bonding devices.
 776          */
 777         if (ret == -EEXIST) {
 778                 /* Is someone being kinky and naming a device bonding_master? */
 779                 if (__dev_get_by_name(bn->net,
 780                                       class_attr_bonding_masters.attr.name))
 781                         pr_err("network device named %s already exists in sysfs\n",
 782                                class_attr_bonding_masters.attr.name);
 783                 ret = 0;
 784         }
 785
 786         return ret;
 787
 788 }
 789
 790 /* Remove /sys/class/net/bonding_masters. */
 791 void bond_destroy_sysfs(struct bond_net *bn)
 792 {
 793         netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
 794 }
 795
 796 /* Initialize sysfs for each bond.  This sets up and registers
 797  * the 'bondctl' directory for each individual bond under /sys/class/net.
 798  */
 799 void bond_prepare_sysfs_group(struct bonding *bond)
 800 {
 801         bond->dev->sysfs_groups[0] = &bonding_group;
 802 }
 803