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