linux/drivers/net/bonding/bond_sysfs.c
<<
>>
Prefs
   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 */
  50static 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
  78static 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 */
  94static 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
 141err_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 */
 147static 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 */
 157static 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. */
 176static 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}
 205static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 206                   bonding_sysfs_store_option);
 207
 208/* Show the bonding mode. */
 209static 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}
 219static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 220                   bonding_show_mode, bonding_sysfs_store_option);
 221
 222/* Show the bonding transmit hash method. */
 223static 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}
 234static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 235                   bonding_show_xmit_hash, bonding_sysfs_store_option);
 236
 237/* Show arp_validate. */
 238static 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}
 250static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 251                   bonding_sysfs_store_option);
 252
 253/* Show arp_all_targets. */
 254static 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}
 266static 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. */
 270static 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}
 282static 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. */
 286static 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}
 294static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 295                   bonding_show_arp_interval, bonding_sysfs_store_option);
 296
 297/* Show the arp targets. */
 298static 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}
 315static 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. */
 319static 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}
 327static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 328                   bonding_show_downdelay, bonding_sysfs_store_option);
 329
 330static 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}
 339static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 340                   bonding_show_updelay, bonding_sysfs_store_option);
 341
 342/* Show the LACP interval. */
 343static 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}
 354static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 355                   bonding_show_lacp, bonding_sysfs_store_option);
 356
 357static 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}
 365static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 366                   bonding_show_min_links, bonding_sysfs_store_option);
 367
 368static 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}
 379static 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. */
 383static 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}
 390static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 391                   bonding_show_num_peer_notif, bonding_sysfs_store_option);
 392static 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. */
 396static 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}
 404static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
 405                   bonding_show_miimon, bonding_sysfs_store_option);
 406
 407/* Show the primary slave. */
 408static 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}
 424static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
 425                   bonding_show_primary, bonding_sysfs_store_option);
 426
 427/* Show the primary_reselect flag. */
 428static 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}
 441static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
 442                   bonding_show_primary_reselect, bonding_sysfs_store_option);
 443
 444/* Show the use_carrier flag. */
 445static 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}
 453static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
 454                   bonding_show_carrier, bonding_sysfs_store_option);
 455
 456
 457/* Show currently active_slave. */
 458static 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}
 474static 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. */
 478static 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}
 487static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
 488
 489/* Show current 802.3ad aggregator ID. */
 490static 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}
 506static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
 507
 508
 509/* Show number of active 802.3ad ports. */
 510static 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}
 526static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
 527
 528
 529/* Show current 802.3ad actor key. */
 530static 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}
 546static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
 547
 548
 549/* Show current 802.3ad partner key. */
 550static 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}
 566static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
 567
 568
 569/* Show current 802.3ad partner mac. */
 570static 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}
 585static 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. */
 588static 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}
 618static 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. */
 623static 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}
 631static 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 */
 635static 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}
 643static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
 644                   bonding_show_resend_igmp, bonding_sysfs_store_option);
 645
 646
 647static 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}
 655static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
 656                   bonding_show_lp_interval, bonding_sysfs_store_option);
 657
 658static 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}
 665static DEVICE_ATTR(tlb_dynamic_lb, S_IRUGO | S_IWUSR,
 666                   bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
 667
 668static 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}
 677static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
 678                   bonding_show_packets_per_slave, bonding_sysfs_store_option);
 679
 680static 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}
 691static DEVICE_ATTR(ad_actor_sys_prio, S_IRUGO | S_IWUSR,
 692                   bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
 693
 694static 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
 706static DEVICE_ATTR(ad_actor_system, S_IRUGO | S_IWUSR,
 707                   bonding_show_ad_actor_system, bonding_sysfs_store_option);
 708
 709static 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}
 720static DEVICE_ATTR(ad_user_port_key, S_IRUGO | S_IWUSR,
 721                   bonding_show_ad_user_port_key, bonding_sysfs_store_option);
 722
 723static 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
 762static const 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 */
 770int 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. */
 803void 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 */
 811void bond_prepare_sysfs_group(struct bonding *bond)
 812{
 813        bond->dev->sysfs_groups[0] = &bonding_group;
 814}
 815
 816