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, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  */
  22
  23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <linux/sched.h>
  29 #include <linux/fs.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/inetdevice.h>
  34 #include <linux/in.h>
  35 #include <linux/sysfs.h>
  36 #include <linux/ctype.h>
  37 #include <linux/inet.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/etherdevice.h>
  40 #include <net/net_namespace.h>
  41 #include <net/netns/generic.h>
  42 #include <linux/nsproxy.h>
  43
  44 #include "bonding.h"
  45
  46 #define to_dev(obj)     container_of(obj, struct device, kobj)
  47 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  48
  49 /*
  50  * "show" function for the bond_masters attribute.
  51  * The class parameter is ignored.
  52  */
  53 static ssize_t bonding_show_bonds(struct class *cls,
  54                                   struct class_attribute *attr,
  55                                   char *buf)
  56 {
  57         struct bond_net *bn =
  58                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  59         int res = 0;
  60         struct bonding *bond;
  61
  62         rtnl_lock();
  63
  64         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  65                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  66                         /* not enough space for another interface name */
  67                         if ((PAGE_SIZE - res) > 10)
  68                                 res = PAGE_SIZE - 10;
  69                         res += sprintf(buf + res, "++more++ ");
  70                         break;
  71                 }
  72                 res += sprintf(buf + res, "%s ", bond->dev->name);
  73         }
  74         if (res)
  75                 buf[res-1] = '\n'; /* eat the leftover space */
  76
  77         rtnl_unlock();
  78         return res;
  79 }
  80
  81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  82 {
  83         struct bonding *bond;
  84
  85         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  86                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  87                         return bond->dev;
  88         }
  89         return NULL;
  90 }
  91
  92 /*
  93  * "store" function for the bond_masters attribute.  This is what
  94  * creates and deletes entire bonds.
  95  *
  96  * The class parameter is ignored.
  97  *
  98  */
  99
 100 static ssize_t bonding_store_bonds(struct class *cls,
 101                                    struct class_attribute *attr,
 102                                    const char *buffer, size_t count)
 103 {
 104         struct bond_net *bn =
 105                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 106         char command[IFNAMSIZ + 1] = {0, };
 107         char *ifname;
 108         int rv, res = count;
 109
 110         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 111         ifname = command + 1;
 112         if ((strlen(command) <= 1) ||
 113             !dev_valid_name(ifname))
 114                 goto err_no_cmd;
 115
 116         if (command[0] == '+') {
 117                 pr_info("%s is being created...\n", ifname);
 118                 rv = bond_create(bn->net, ifname);
 119                 if (rv) {
 120                         if (rv == -EEXIST)
 121                                 pr_info("%s already exists.\n", ifname);
 122                         else
 123                                 pr_info("%s creation failed.\n", ifname);
 124                         res = rv;
 125                 }
 126         } else if (command[0] == '-') {
 127                 struct net_device *bond_dev;
 128
 129                 rtnl_lock();
 130                 bond_dev = bond_get_by_name(bn, ifname);
 131                 if (bond_dev) {
 132                         pr_info("%s is being deleted...\n", ifname);
 133                         unregister_netdevice(bond_dev);
 134                 } else {
 135                         pr_err("unable to delete non-existent %s\n", ifname);
 136                         res = -ENODEV;
 137                 }
 138                 rtnl_unlock();
 139         } else
 140                 goto err_no_cmd;
 141
 142         /* Always return either count or an error.  If you return 0, you'll
 143          * get called forever, which is bad.
 144          */
 145         return res;
 146
 147 err_no_cmd:
 148         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 149         return -EPERM;
 150 }
 151
 152 static const void *bonding_namespace(struct class *cls,
 153                                      const struct class_attribute *attr)
 154 {
 155         const struct bond_net *bn =
 156                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 157         return bn->net;
 158 }
 159
 160 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 161 static const struct class_attribute class_attr_bonding_masters = {
 162         .attr = {
 163                 .name = "bonding_masters",
 164                 .mode = S_IWUSR | S_IRUGO,
 165         },
 166         .show = bonding_show_bonds,
 167         .store = bonding_store_bonds,
 168         .namespace = bonding_namespace,
 169 };
 170
 171 int bond_create_slave_symlinks(struct net_device *master,
 172                                struct net_device *slave)
 173 {
 174         char linkname[IFNAMSIZ+7];
 175         int ret = 0;
 176
 177         /* first, create a link from the slave back to the master */
 178         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 179                                 "master");
 180         if (ret)
 181                 return ret;
 182         /* next, create a link from the master to the slave */
 183         sprintf(linkname, "slave_%s", slave->name);
 184         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 185                                 linkname);
 186
 187         /* free the master link created earlier in case of error */
 188         if (ret)
 189                 sysfs_remove_link(&(slave->dev.kobj), "master");
 190
 191         return ret;
 192
 193 }
 194
 195 void bond_destroy_slave_symlinks(struct net_device *master,
 196                                  struct net_device *slave)
 197 {
 198         char linkname[IFNAMSIZ+7];
 199
 200         sysfs_remove_link(&(slave->dev.kobj), "master");
 201         sprintf(linkname, "slave_%s", slave->name);
 202         sysfs_remove_link(&(master->dev.kobj), linkname);
 203 }
 204
 205
 206 /*
 207  * Show the slaves in the current bond.
 208  */
 209 static ssize_t bonding_show_slaves(struct device *d,
 210                                    struct device_attribute *attr, char *buf)
 211 {
 212         struct slave *slave;
 213         int i, res = 0;
 214         struct bonding *bond = to_bond(d);
 215
 216         read_lock(&bond->lock);
 217         bond_for_each_slave(bond, slave, i) {
 218                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 219                         /* not enough space for another interface name */
 220                         if ((PAGE_SIZE - res) > 10)
 221                                 res = PAGE_SIZE - 10;
 222                         res += sprintf(buf + res, "++more++ ");
 223                         break;
 224                 }
 225                 res += sprintf(buf + res, "%s ", slave->dev->name);
 226         }
 227         read_unlock(&bond->lock);
 228         if (res)
 229                 buf[res-1] = '\n'; /* eat the leftover space */
 230         return res;
 231 }
 232
 233 /*
 234  * Set the slaves in the current bond.  The bond interface must be
 235  * up for this to succeed.
 236  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 237  * All hard work should be done there.
 238  */
 239 static ssize_t bonding_store_slaves(struct device *d,
 240                                     struct device_attribute *attr,
 241                                     const char *buffer, size_t count)
 242 {
 243         char command[IFNAMSIZ + 1] = { 0, };
 244         char *ifname;
 245         int res, ret = count;
 246         struct net_device *dev;
 247         struct bonding *bond = to_bond(d);
 248
 249         if (!rtnl_trylock())
 250                 return restart_syscall();
 251
 252         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 253         ifname = command + 1;
 254         if ((strlen(command) <= 1) ||
 255             !dev_valid_name(ifname))
 256                 goto err_no_cmd;
 257
 258         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 259         if (!dev) {
 260                 pr_info("%s: Interface %s does not exist!\n",
 261                         bond->dev->name, ifname);
 262                 ret = -ENODEV;
 263                 goto out;
 264         }
 265
 266         switch (command[0]) {
 267         case '+':
 268                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 269                 res = bond_enslave(bond->dev, dev);
 270                 break;
 271
 272         case '-':
 273                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 274                 res = bond_release(bond->dev, dev);
 275                 break;
 276
 277         default:
 278                 goto err_no_cmd;
 279         }
 280
 281         if (res)
 282                 ret = res;
 283         goto out;
 284
 285 err_no_cmd:
 286         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 287                bond->dev->name);
 288         ret = -EPERM;
 289
 290 out:
 291         rtnl_unlock();
 292         return ret;
 293 }
 294
 295 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 296                    bonding_store_slaves);
 297
 298 /*
 299  * Show and set the bonding mode.  The bond interface must be down to
 300  * change the mode.
 301  */
 302 static ssize_t bonding_show_mode(struct device *d,
 303                                  struct device_attribute *attr, char *buf)
 304 {
 305         struct bonding *bond = to_bond(d);
 306
 307         return sprintf(buf, "%s %d\n",
 308                         bond_mode_tbl[bond->params.mode].modename,
 309                         bond->params.mode);
 310 }
 311
 312 static ssize_t bonding_store_mode(struct device *d,
 313                                   struct device_attribute *attr,
 314                                   const char *buf, size_t count)
 315 {
 316         int new_value, ret = count;
 317         struct bonding *bond = to_bond(d);
 318
 319         if (bond->dev->flags & IFF_UP) {
 320                 pr_err("unable to update mode of %s because interface is up.\n",
 321                        bond->dev->name);
 322                 ret = -EPERM;
 323                 goto out;
 324         }
 325
 326         if (bond->slave_cnt > 0) {
 327                 pr_err("unable to update mode of %s because it has slaves.\n",
 328                         bond->dev->name);
 329                 ret = -EPERM;
 330                 goto out;
 331         }
 332
 333         new_value = bond_parse_parm(buf, bond_mode_tbl);
 334         if (new_value < 0)  {
 335                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 336                        bond->dev->name, (int)strlen(buf) - 1, buf);
 337                 ret = -EINVAL;
 338                 goto out;
 339         }
 340         if ((new_value == BOND_MODE_ALB ||
 341              new_value == BOND_MODE_TLB) &&
 342             bond->params.arp_interval) {
 343                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 344                        bond->dev->name, bond_mode_tbl[new_value].modename);
 345                 ret = -EINVAL;
 346                 goto out;
 347         }
 348
 349         bond->params.mode = new_value;
 350         bond_set_mode_ops(bond, bond->params.mode);
 351         pr_info("%s: setting mode to %s (%d).\n",
 352                 bond->dev->name, bond_mode_tbl[new_value].modename,
 353                 new_value);
 354 out:
 355         return ret;
 356 }
 357 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 358                    bonding_show_mode, bonding_store_mode);
 359
 360 /*
 361  * Show and set the bonding transmit hash method.
 362  * The bond interface must be down to change the xmit hash policy.
 363  */
 364 static ssize_t bonding_show_xmit_hash(struct device *d,
 365                                       struct device_attribute *attr,
 366                                       char *buf)
 367 {
 368         struct bonding *bond = to_bond(d);
 369
 370         return sprintf(buf, "%s %d\n",
 371                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 372                        bond->params.xmit_policy);
 373 }
 374
 375 static ssize_t bonding_store_xmit_hash(struct device *d,
 376                                        struct device_attribute *attr,
 377                                        const char *buf, size_t count)
 378 {
 379         int new_value, ret = count;
 380         struct bonding *bond = to_bond(d);
 381
 382         if (bond->dev->flags & IFF_UP) {
 383                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 384                        bond->dev->name);
 385                 ret = -EPERM;
 386                 goto out;
 387         }
 388
 389         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 390         if (new_value < 0)  {
 391                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 392                        bond->dev->name,
 393                        (int)strlen(buf) - 1, buf);
 394                 ret = -EINVAL;
 395                 goto out;
 396         } else {
 397                 bond->params.xmit_policy = new_value;
 398                 bond_set_mode_ops(bond, bond->params.mode);
 399                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 400                         bond->dev->name,
 401                         xmit_hashtype_tbl[new_value].modename, new_value);
 402         }
 403 out:
 404         return ret;
 405 }
 406 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 407                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 408
 409 /*
 410  * Show and set arp_validate.
 411  */
 412 static ssize_t bonding_show_arp_validate(struct device *d,
 413                                          struct device_attribute *attr,
 414                                          char *buf)
 415 {
 416         struct bonding *bond = to_bond(d);
 417
 418         return sprintf(buf, "%s %d\n",
 419                        arp_validate_tbl[bond->params.arp_validate].modename,
 420                        bond->params.arp_validate);
 421 }
 422
 423 static ssize_t bonding_store_arp_validate(struct device *d,
 424                                           struct device_attribute *attr,
 425                                           const char *buf, size_t count)
 426 {
 427         int new_value;
 428         struct bonding *bond = to_bond(d);
 429
 430         new_value = bond_parse_parm(buf, arp_validate_tbl);
 431         if (new_value < 0) {
 432                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 433                        bond->dev->name, buf);
 434                 return -EINVAL;
 435         }
 436         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 437                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 438                        bond->dev->name);
 439                 return -EINVAL;
 440         }
 441         pr_info("%s: setting arp_validate to %s (%d).\n",
 442                 bond->dev->name, arp_validate_tbl[new_value].modename,
 443                 new_value);
 444
 445         bond->params.arp_validate = new_value;
 446
 447         return count;
 448 }
 449
 450 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 451                    bonding_store_arp_validate);
 452
 453 /*
 454  * Show and store fail_over_mac.  User only allowed to change the
 455  * value when there are no slaves.
 456  */
 457 static ssize_t bonding_show_fail_over_mac(struct device *d,
 458                                           struct device_attribute *attr,
 459                                           char *buf)
 460 {
 461         struct bonding *bond = to_bond(d);
 462
 463         return sprintf(buf, "%s %d\n",
 464                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 465                        bond->params.fail_over_mac);
 466 }
 467
 468 static ssize_t bonding_store_fail_over_mac(struct device *d,
 469                                            struct device_attribute *attr,
 470                                            const char *buf, size_t count)
 471 {
 472         int new_value;
 473         struct bonding *bond = to_bond(d);
 474
 475         if (bond->slave_cnt != 0) {
 476                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 477                        bond->dev->name);
 478                 return -EPERM;
 479         }
 480
 481         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 482         if (new_value < 0) {
 483                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 484                        bond->dev->name, buf);
 485                 return -EINVAL;
 486         }
 487
 488         bond->params.fail_over_mac = new_value;
 489         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 490                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 491                 new_value);
 492
 493         return count;
 494 }
 495
 496 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 497                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 498
 499 /*
 500  * Show and set the arp timer interval.  There are two tricky bits
 501  * here.  First, if ARP monitoring is activated, then we must disable
 502  * MII monitoring.  Second, if the ARP timer isn't running, we must
 503  * start it.
 504  */
 505 static ssize_t bonding_show_arp_interval(struct device *d,
 506                                          struct device_attribute *attr,
 507                                          char *buf)
 508 {
 509         struct bonding *bond = to_bond(d);
 510
 511         return sprintf(buf, "%d\n", bond->params.arp_interval);
 512 }
 513
 514 static ssize_t bonding_store_arp_interval(struct device *d,
 515                                           struct device_attribute *attr,
 516                                           const char *buf, size_t count)
 517 {
 518         int new_value, ret = count;
 519         struct bonding *bond = to_bond(d);
 520
 521         if (!rtnl_trylock())
 522                 return restart_syscall();
 523         if (sscanf(buf, "%d", &new_value) != 1) {
 524                 pr_err("%s: no arp_interval value specified.\n",
 525                        bond->dev->name);
 526                 ret = -EINVAL;
 527                 goto out;
 528         }
 529         if (new_value < 0) {
 530                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 531                        bond->dev->name, new_value, INT_MAX);
 532                 ret = -EINVAL;
 533                 goto out;
 534         }
 535         if (bond->params.mode == BOND_MODE_ALB ||
 536             bond->params.mode == BOND_MODE_TLB) {
 537                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 538                         bond->dev->name, bond->dev->name);
 539                 ret = -EINVAL;
 540                 goto out;
 541         }
 542         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 543                 bond->dev->name, new_value);
 544         bond->params.arp_interval = new_value;
 545         if (bond->params.miimon) {
 546                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 547                         bond->dev->name, bond->dev->name);
 548                 bond->params.miimon = 0;
 549         }
 550         if (!bond->params.arp_targets[0]) {
 551                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 552                         bond->dev->name);
 553         }
 554         if (bond->dev->flags & IFF_UP) {
 555                 /* If the interface is up, we may need to fire off
 556                  * the ARP timer.  If the interface is down, the
 557                  * timer will get fired off when the open function
 558                  * is called.
 559                  */
 560                 cancel_delayed_work_sync(&bond->mii_work);
 561                 queue_delayed_work(bond->wq, &bond->arp_work, 0);
 562         }
 563
 564 out:
 565         rtnl_unlock();
 566         return ret;
 567 }
 568 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 569                    bonding_show_arp_interval, bonding_store_arp_interval);
 570
 571 /*
 572  * Show and set the arp targets.
 573  */
 574 static ssize_t bonding_show_arp_targets(struct device *d,
 575                                         struct device_attribute *attr,
 576                                         char *buf)
 577 {
 578         int i, res = 0;
 579         struct bonding *bond = to_bond(d);
 580
 581         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 582                 if (bond->params.arp_targets[i])
 583                         res += sprintf(buf + res, "%pI4 ",
 584                                        &bond->params.arp_targets[i]);
 585         }
 586         if (res)
 587                 buf[res-1] = '\n'; /* eat the leftover space */
 588         return res;
 589 }
 590
 591 static ssize_t bonding_store_arp_targets(struct device *d,
 592                                          struct device_attribute *attr,
 593                                          const char *buf, size_t count)
 594 {
 595         __be32 newtarget;
 596         int i = 0, done = 0, ret = count;
 597         struct bonding *bond = to_bond(d);
 598         __be32 *targets;
 599
 600         targets = bond->params.arp_targets;
 601         newtarget = in_aton(buf + 1);
 602         /* look for adds */
 603         if (buf[0] == '+') {
 604                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 605                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 606                                bond->dev->name, &newtarget);
 607                         ret = -EINVAL;
 608                         goto out;
 609                 }
 610                 /* look for an empty slot to put the target in, and check for dupes */
 611                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 612                         if (targets[i] == newtarget) { /* duplicate */
 613                                 pr_err("%s: ARP target %pI4 is already present\n",
 614                                        bond->dev->name, &newtarget);
 615                                 ret = -EINVAL;
 616                                 goto out;
 617                         }
 618                         if (targets[i] == 0) {
 619                                 pr_info("%s: adding ARP target %pI4.\n",
 620                                         bond->dev->name, &newtarget);
 621                                 done = 1;
 622                                 targets[i] = newtarget;
 623                         }
 624                 }
 625                 if (!done) {
 626                         pr_err("%s: ARP target table is full!\n",
 627                                bond->dev->name);
 628                         ret = -EINVAL;
 629                         goto out;
 630                 }
 631
 632         } else if (buf[0] == '-')       {
 633                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 634                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 635                                bond->dev->name, &newtarget);
 636                         ret = -EINVAL;
 637                         goto out;
 638                 }
 639
 640                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 641                         if (targets[i] == newtarget) {
 642                                 int j;
 643                                 pr_info("%s: removing ARP target %pI4.\n",
 644                                         bond->dev->name, &newtarget);
 645                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 646                                         targets[j] = targets[j+1];
 647
 648                                 targets[j] = 0;
 649                                 done = 1;
 650                         }
 651                 }
 652                 if (!done) {
 653                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 654                                 bond->dev->name, &newtarget);
 655                         ret = -EINVAL;
 656                         goto out;
 657                 }
 658         } else {
 659                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 660                        bond->dev->name);
 661                 ret = -EPERM;
 662                 goto out;
 663         }
 664
 665 out:
 666         return ret;
 667 }
 668 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 669
 670 /*
 671  * Show and set the up and down delays.  These must be multiples of the
 672  * MII monitoring value, and are stored internally as the multiplier.
 673  * Thus, we must translate to MS for the real world.
 674  */
 675 static ssize_t bonding_show_downdelay(struct device *d,
 676                                       struct device_attribute *attr,
 677                                       char *buf)
 678 {
 679         struct bonding *bond = to_bond(d);
 680
 681         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 682 }
 683
 684 static ssize_t bonding_store_downdelay(struct device *d,
 685                                        struct device_attribute *attr,
 686                                        const char *buf, size_t count)
 687 {
 688         int new_value, ret = count;
 689         struct bonding *bond = to_bond(d);
 690
 691         if (!(bond->params.miimon)) {
 692                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 693                        bond->dev->name);
 694                 ret = -EPERM;
 695                 goto out;
 696         }
 697
 698         if (sscanf(buf, "%d", &new_value) != 1) {
 699                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 700                 ret = -EINVAL;
 701                 goto out;
 702         }
 703         if (new_value < 0) {
 704                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 705                        bond->dev->name, new_value, 1, INT_MAX);
 706                 ret = -EINVAL;
 707                 goto out;
 708         } else {
 709                 if ((new_value % bond->params.miimon) != 0) {
 710                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 711                                    bond->dev->name, new_value,
 712                                    bond->params.miimon,
 713                                    (new_value / bond->params.miimon) *
 714                                    bond->params.miimon);
 715                 }
 716                 bond->params.downdelay = new_value / bond->params.miimon;
 717                 pr_info("%s: Setting down delay to %d.\n",
 718                         bond->dev->name,
 719                         bond->params.downdelay * bond->params.miimon);
 720
 721         }
 722
 723 out:
 724         return ret;
 725 }
 726 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 727                    bonding_show_downdelay, bonding_store_downdelay);
 728
 729 static ssize_t bonding_show_updelay(struct device *d,
 730                                     struct device_attribute *attr,
 731                                     char *buf)
 732 {
 733         struct bonding *bond = to_bond(d);
 734
 735         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 736
 737 }
 738
 739 static ssize_t bonding_store_updelay(struct device *d,
 740                                      struct device_attribute *attr,
 741                                      const char *buf, size_t count)
 742 {
 743         int new_value, ret = count;
 744         struct bonding *bond = to_bond(d);
 745
 746         if (!(bond->params.miimon)) {
 747                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 748                        bond->dev->name);
 749                 ret = -EPERM;
 750                 goto out;
 751         }
 752
 753         if (sscanf(buf, "%d", &new_value) != 1) {
 754                 pr_err("%s: no up delay value specified.\n",
 755                        bond->dev->name);
 756                 ret = -EINVAL;
 757                 goto out;
 758         }
 759         if (new_value < 0) {
 760                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 761                        bond->dev->name, new_value, 1, INT_MAX);
 762                 ret = -EINVAL;
 763                 goto out;
 764         } else {
 765                 if ((new_value % bond->params.miimon) != 0) {
 766                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 767                                    bond->dev->name, new_value,
 768                                    bond->params.miimon,
 769                                    (new_value / bond->params.miimon) *
 770                                    bond->params.miimon);
 771                 }
 772                 bond->params.updelay = new_value / bond->params.miimon;
 773                 pr_info("%s: Setting up delay to %d.\n",
 774                         bond->dev->name,
 775                         bond->params.updelay * bond->params.miimon);
 776         }
 777
 778 out:
 779         return ret;
 780 }
 781 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 782                    bonding_show_updelay, bonding_store_updelay);
 783
 784 /*
 785  * Show and set the LACP interval.  Interface must be down, and the mode
 786  * must be set to 802.3ad mode.
 787  */
 788 static ssize_t bonding_show_lacp(struct device *d,
 789                                  struct device_attribute *attr,
 790                                  char *buf)
 791 {
 792         struct bonding *bond = to_bond(d);
 793
 794         return sprintf(buf, "%s %d\n",
 795                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 796                 bond->params.lacp_fast);
 797 }
 798
 799 static ssize_t bonding_store_lacp(struct device *d,
 800                                   struct device_attribute *attr,
 801                                   const char *buf, size_t count)
 802 {
 803         int new_value, ret = count;
 804         struct bonding *bond = to_bond(d);
 805
 806         if (bond->dev->flags & IFF_UP) {
 807                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 808                        bond->dev->name);
 809                 ret = -EPERM;
 810                 goto out;
 811         }
 812
 813         if (bond->params.mode != BOND_MODE_8023AD) {
 814                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 815                        bond->dev->name);
 816                 ret = -EPERM;
 817                 goto out;
 818         }
 819
 820         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 821
 822         if ((new_value == 1) || (new_value == 0)) {
 823                 bond->params.lacp_fast = new_value;
 824                 bond_3ad_update_lacp_rate(bond);
 825                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 826                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 827                         new_value);
 828         } else {
 829                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 830                        bond->dev->name, (int)strlen(buf) - 1, buf);
 831                 ret = -EINVAL;
 832         }
 833 out:
 834         return ret;
 835 }
 836 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 837                    bonding_show_lacp, bonding_store_lacp);
 838
 839 static ssize_t bonding_show_min_links(struct device *d,
 840                                       struct device_attribute *attr,
 841                                       char *buf)
 842 {
 843         struct bonding *bond = to_bond(d);
 844
 845         return sprintf(buf, "%d\n", bond->params.min_links);
 846 }
 847
 848 static ssize_t bonding_store_min_links(struct device *d,
 849                                        struct device_attribute *attr,
 850                                        const char *buf, size_t count)
 851 {
 852         struct bonding *bond = to_bond(d);
 853         int ret;
 854         unsigned int new_value;
 855
 856         ret = kstrtouint(buf, 0, &new_value);
 857         if (ret < 0) {
 858                 pr_err("%s: Ignoring invalid min links value %s.\n",
 859                        bond->dev->name, buf);
 860                 return ret;
 861         }
 862
 863         pr_info("%s: Setting min links value to %u\n",
 864                 bond->dev->name, new_value);
 865         bond->params.min_links = new_value;
 866         return count;
 867 }
 868 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 869                    bonding_show_min_links, bonding_store_min_links);
 870
 871 static ssize_t bonding_show_ad_select(struct device *d,
 872                                       struct device_attribute *attr,
 873                                       char *buf)
 874 {
 875         struct bonding *bond = to_bond(d);
 876
 877         return sprintf(buf, "%s %d\n",
 878                 ad_select_tbl[bond->params.ad_select].modename,
 879                 bond->params.ad_select);
 880 }
 881
 882
 883 static ssize_t bonding_store_ad_select(struct device *d,
 884                                        struct device_attribute *attr,
 885                                        const char *buf, size_t count)
 886 {
 887         int new_value, ret = count;
 888         struct bonding *bond = to_bond(d);
 889
 890         if (bond->dev->flags & IFF_UP) {
 891                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 892                        bond->dev->name);
 893                 ret = -EPERM;
 894                 goto out;
 895         }
 896
 897         new_value = bond_parse_parm(buf, ad_select_tbl);
 898
 899         if (new_value != -1) {
 900                 bond->params.ad_select = new_value;
 901                 pr_info("%s: Setting ad_select to %s (%d).\n",
 902                         bond->dev->name, ad_select_tbl[new_value].modename,
 903                         new_value);
 904         } else {
 905                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 906                        bond->dev->name, (int)strlen(buf) - 1, buf);
 907                 ret = -EINVAL;
 908         }
 909 out:
 910         return ret;
 911 }
 912 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 913                    bonding_show_ad_select, bonding_store_ad_select);
 914
 915 /*
 916  * Show and set the number of peer notifications to send after a failover event.
 917  */
 918 static ssize_t bonding_show_num_peer_notif(struct device *d,
 919                                            struct device_attribute *attr,
 920                                            char *buf)
 921 {
 922         struct bonding *bond = to_bond(d);
 923         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 924 }
 925
 926 static ssize_t bonding_store_num_peer_notif(struct device *d,
 927                                             struct device_attribute *attr,
 928                                             const char *buf, size_t count)
 929 {
 930         struct bonding *bond = to_bond(d);
 931         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 932         return err ? err : count;
 933 }
 934 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 935                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 936 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 937                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 938
 939 /*
 940  * Show and set the MII monitor interval.  There are two tricky bits
 941  * here.  First, if MII monitoring is activated, then we must disable
 942  * ARP monitoring.  Second, if the timer isn't running, we must
 943  * start it.
 944  */
 945 static ssize_t bonding_show_miimon(struct device *d,
 946                                    struct device_attribute *attr,
 947                                    char *buf)
 948 {
 949         struct bonding *bond = to_bond(d);
 950
 951         return sprintf(buf, "%d\n", bond->params.miimon);
 952 }
 953
 954 static ssize_t bonding_store_miimon(struct device *d,
 955                                     struct device_attribute *attr,
 956                                     const char *buf, size_t count)
 957 {
 958         int new_value, ret = count;
 959         struct bonding *bond = to_bond(d);
 960
 961         if (!rtnl_trylock())
 962                 return restart_syscall();
 963         if (sscanf(buf, "%d", &new_value) != 1) {
 964                 pr_err("%s: no miimon value specified.\n",
 965                        bond->dev->name);
 966                 ret = -EINVAL;
 967                 goto out;
 968         }
 969         if (new_value < 0) {
 970                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 971                        bond->dev->name, new_value, 1, INT_MAX);
 972                 ret = -EINVAL;
 973                 goto out;
 974         } else {
 975                 pr_info("%s: Setting MII monitoring interval to %d.\n",
 976                         bond->dev->name, new_value);
 977                 bond->params.miimon = new_value;
 978                 if (bond->params.updelay)
 979                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 980                                 bond->dev->name,
 981                                 bond->params.updelay * bond->params.miimon);
 982                 if (bond->params.downdelay)
 983                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 984                                 bond->dev->name,
 985                                 bond->params.downdelay * bond->params.miimon);
 986                 if (bond->params.arp_interval) {
 987                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 988                                 bond->dev->name);
 989                         bond->params.arp_interval = 0;
 990                         if (bond->params.arp_validate) {
 991                                 bond->params.arp_validate =
 992                                         BOND_ARP_VALIDATE_NONE;
 993                         }
 994                 }
 995
 996                 if (bond->dev->flags & IFF_UP) {
 997                         /* If the interface is up, we may need to fire off
 998                          * the MII timer. If the interface is down, the
 999                          * timer will get fired off when the open function
1000                          * is called.
1001                          */
1002                         cancel_delayed_work_sync(&bond->arp_work);
1003                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1004                 }
1005         }
1006 out:
1007         rtnl_unlock();
1008         return ret;
1009 }
1010 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1011                    bonding_show_miimon, bonding_store_miimon);
1012
1013 /*
1014  * Show and set the primary slave.  The store function is much
1015  * simpler than bonding_store_slaves function because it only needs to
1016  * handle one interface name.
1017  * The bond must be a mode that supports a primary for this be
1018  * set.
1019  */
1020 static ssize_t bonding_show_primary(struct device *d,
1021                                     struct device_attribute *attr,
1022                                     char *buf)
1023 {
1024         int count = 0;
1025         struct bonding *bond = to_bond(d);
1026
1027         if (bond->primary_slave)
1028                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1029
1030         return count;
1031 }
1032
1033 static ssize_t bonding_store_primary(struct device *d,
1034                                      struct device_attribute *attr,
1035                                      const char *buf, size_t count)
1036 {
1037         int i;
1038         struct slave *slave;
1039         struct bonding *bond = to_bond(d);
1040         char ifname[IFNAMSIZ];
1041
1042         if (!rtnl_trylock())
1043                 return restart_syscall();
1044         block_netpoll_tx();
1045         read_lock(&bond->lock);
1046         write_lock_bh(&bond->curr_slave_lock);
1047
1048         if (!USES_PRIMARY(bond->params.mode)) {
1049                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1050                         bond->dev->name, bond->dev->name, bond->params.mode);
1051                 goto out;
1052         }
1053
1054         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1055
1056         /* check to see if we are clearing primary */
1057         if (!strlen(ifname) || buf[0] == '\n') {
1058                 pr_info("%s: Setting primary slave to None.\n",
1059                         bond->dev->name);
1060                 bond->primary_slave = NULL;
1061                 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1062                 bond_select_active_slave(bond);
1063                 goto out;
1064         }
1065
1066         bond_for_each_slave(bond, slave, i) {
1067                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1068                         pr_info("%s: Setting %s as primary slave.\n",
1069                                 bond->dev->name, slave->dev->name);
1070                         bond->primary_slave = slave;
1071                         strcpy(bond->params.primary, slave->dev->name);
1072                         bond_select_active_slave(bond);
1073                         goto out;
1074                 }
1075         }
1076
1077         strncpy(bond->params.primary, ifname, IFNAMSIZ);
1078         bond->params.primary[IFNAMSIZ - 1] = 0;
1079
1080         pr_info("%s: Recording %s as primary, "
1081                 "but it has not been enslaved to %s yet.\n",
1082                 bond->dev->name, ifname, bond->dev->name);
1083 out:
1084         write_unlock_bh(&bond->curr_slave_lock);
1085         read_unlock(&bond->lock);
1086         unblock_netpoll_tx();
1087         rtnl_unlock();
1088
1089         return count;
1090 }
1091 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1092                    bonding_show_primary, bonding_store_primary);
1093
1094 /*
1095  * Show and set the primary_reselect flag.
1096  */
1097 static ssize_t bonding_show_primary_reselect(struct device *d,
1098                                              struct device_attribute *attr,
1099                                              char *buf)
1100 {
1101         struct bonding *bond = to_bond(d);
1102
1103         return sprintf(buf, "%s %d\n",
1104                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1105                        bond->params.primary_reselect);
1106 }
1107
1108 static ssize_t bonding_store_primary_reselect(struct device *d,
1109                                               struct device_attribute *attr,
1110                                               const char *buf, size_t count)
1111 {
1112         int new_value, ret = count;
1113         struct bonding *bond = to_bond(d);
1114
1115         if (!rtnl_trylock())
1116                 return restart_syscall();
1117
1118         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1119         if (new_value < 0)  {
1120                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1121                        bond->dev->name,
1122                        (int) strlen(buf) - 1, buf);
1123                 ret = -EINVAL;
1124                 goto out;
1125         }
1126
1127         bond->params.primary_reselect = new_value;
1128         pr_info("%s: setting primary_reselect to %s (%d).\n",
1129                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1130                 new_value);
1131
1132         block_netpoll_tx();
1133         read_lock(&bond->lock);
1134         write_lock_bh(&bond->curr_slave_lock);
1135         bond_select_active_slave(bond);
1136         write_unlock_bh(&bond->curr_slave_lock);
1137         read_unlock(&bond->lock);
1138         unblock_netpoll_tx();
1139 out:
1140         rtnl_unlock();
1141         return ret;
1142 }
1143 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1144                    bonding_show_primary_reselect,
1145                    bonding_store_primary_reselect);
1146
1147 /*
1148  * Show and set the use_carrier flag.
1149  */
1150 static ssize_t bonding_show_carrier(struct device *d,
1151                                     struct device_attribute *attr,
1152                                     char *buf)
1153 {
1154         struct bonding *bond = to_bond(d);
1155
1156         return sprintf(buf, "%d\n", bond->params.use_carrier);
1157 }
1158
1159 static ssize_t bonding_store_carrier(struct device *d,
1160                                      struct device_attribute *attr,
1161                                      const char *buf, size_t count)
1162 {
1163         int new_value, ret = count;
1164         struct bonding *bond = to_bond(d);
1165
1166
1167         if (sscanf(buf, "%d", &new_value) != 1) {
1168                 pr_err("%s: no use_carrier value specified.\n",
1169                        bond->dev->name);
1170                 ret = -EINVAL;
1171                 goto out;
1172         }
1173         if ((new_value == 0) || (new_value == 1)) {
1174                 bond->params.use_carrier = new_value;
1175                 pr_info("%s: Setting use_carrier to %d.\n",
1176                         bond->dev->name, new_value);
1177         } else {
1178                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1179                         bond->dev->name, new_value);
1180         }
1181 out:
1182         return ret;
1183 }
1184 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1185                    bonding_show_carrier, bonding_store_carrier);
1186
1187
1188 /*
1189  * Show and set currently active_slave.
1190  */
1191 static ssize_t bonding_show_active_slave(struct device *d,
1192                                          struct device_attribute *attr,
1193                                          char *buf)
1194 {
1195         struct slave *curr;
1196         struct bonding *bond = to_bond(d);
1197         int count = 0;
1198
1199         read_lock(&bond->curr_slave_lock);
1200         curr = bond->curr_active_slave;
1201         read_unlock(&bond->curr_slave_lock);
1202
1203         if (USES_PRIMARY(bond->params.mode) && curr)
1204                 count = sprintf(buf, "%s\n", curr->dev->name);
1205         return count;
1206 }
1207
1208 static ssize_t bonding_store_active_slave(struct device *d,
1209                                           struct device_attribute *attr,
1210                                           const char *buf, size_t count)
1211 {
1212         int i;
1213         struct slave *slave;
1214         struct slave *old_active = NULL;
1215         struct slave *new_active = NULL;
1216         struct bonding *bond = to_bond(d);
1217         char ifname[IFNAMSIZ];
1218
1219         if (!rtnl_trylock())
1220                 return restart_syscall();
1221
1222         block_netpoll_tx();
1223         read_lock(&bond->lock);
1224         write_lock_bh(&bond->curr_slave_lock);
1225
1226         if (!USES_PRIMARY(bond->params.mode)) {
1227                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1228                         bond->dev->name, bond->dev->name, bond->params.mode);
1229                 goto out;
1230         }
1231
1232         sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1233
1234         /* check to see if we are clearing active */
1235         if (!strlen(ifname) || buf[0] == '\n') {
1236                 pr_info("%s: Clearing current active slave.\n",
1237                         bond->dev->name);
1238                 bond->curr_active_slave = NULL;
1239                 bond_select_active_slave(bond);
1240                 goto out;
1241         }
1242
1243         bond_for_each_slave(bond, slave, i) {
1244                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1245                         old_active = bond->curr_active_slave;
1246                         new_active = slave;
1247                         if (new_active == old_active) {
1248                                 /* do nothing */
1249                                 pr_info("%s: %s is already the current"
1250                                         " active slave.\n",
1251                                         bond->dev->name,
1252                                         slave->dev->name);
1253                                 goto out;
1254                         }
1255                         else {
1256                                 if ((new_active) &&
1257                                     (old_active) &&
1258                                     (new_active->link == BOND_LINK_UP) &&
1259                                     IS_UP(new_active->dev)) {
1260                                         pr_info("%s: Setting %s as active"
1261                                                 " slave.\n",
1262                                                 bond->dev->name,
1263                                                 slave->dev->name);
1264                                         bond_change_active_slave(bond,
1265                                                                  new_active);
1266                                 }
1267                                 else {
1268                                         pr_info("%s: Could not set %s as"
1269                                                 " active slave; either %s is"
1270                                                 " down or the link is down.\n",
1271                                                 bond->dev->name,
1272                                                 slave->dev->name,
1273                                                 slave->dev->name);
1274                                 }
1275                                 goto out;
1276                         }
1277                 }
1278         }
1279
1280         pr_info("%s: Unable to set %.*s as active slave.\n",
1281                 bond->dev->name, (int)strlen(buf) - 1, buf);
1282  out:
1283         write_unlock_bh(&bond->curr_slave_lock);
1284         read_unlock(&bond->lock);
1285         unblock_netpoll_tx();
1286
1287         rtnl_unlock();
1288
1289         return count;
1290
1291 }
1292 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1293                    bonding_show_active_slave, bonding_store_active_slave);
1294
1295
1296 /*
1297  * Show link status of the bond interface.
1298  */
1299 static ssize_t bonding_show_mii_status(struct device *d,
1300                                        struct device_attribute *attr,
1301                                        char *buf)
1302 {
1303         struct slave *curr;
1304         struct bonding *bond = to_bond(d);
1305
1306         read_lock(&bond->curr_slave_lock);
1307         curr = bond->curr_active_slave;
1308         read_unlock(&bond->curr_slave_lock);
1309
1310         return sprintf(buf, "%s\n", curr ? "up" : "down");
1311 }
1312 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1313
1314
1315 /*
1316  * Show current 802.3ad aggregator ID.
1317  */
1318 static ssize_t bonding_show_ad_aggregator(struct device *d,
1319                                           struct device_attribute *attr,
1320                                           char *buf)
1321 {
1322         int count = 0;
1323         struct bonding *bond = to_bond(d);
1324
1325         if (bond->params.mode == BOND_MODE_8023AD) {
1326                 struct ad_info ad_info;
1327                 count = sprintf(buf, "%d\n",
1328                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1329                                 ?  0 : ad_info.aggregator_id);
1330         }
1331
1332         return count;
1333 }
1334 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1335
1336
1337 /*
1338  * Show number of active 802.3ad ports.
1339  */
1340 static ssize_t bonding_show_ad_num_ports(struct device *d,
1341                                          struct device_attribute *attr,
1342                                          char *buf)
1343 {
1344         int count = 0;
1345         struct bonding *bond = to_bond(d);
1346
1347         if (bond->params.mode == BOND_MODE_8023AD) {
1348                 struct ad_info ad_info;
1349                 count = sprintf(buf, "%d\n",
1350                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1351                                 ?  0 : ad_info.ports);
1352         }
1353
1354         return count;
1355 }
1356 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1357
1358
1359 /*
1360  * Show current 802.3ad actor key.
1361  */
1362 static ssize_t bonding_show_ad_actor_key(struct device *d,
1363                                          struct device_attribute *attr,
1364                                          char *buf)
1365 {
1366         int count = 0;
1367         struct bonding *bond = to_bond(d);
1368
1369         if (bond->params.mode == BOND_MODE_8023AD) {
1370                 struct ad_info ad_info;
1371                 count = sprintf(buf, "%d\n",
1372                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1373                                 ?  0 : ad_info.actor_key);
1374         }
1375
1376         return count;
1377 }
1378 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1379
1380
1381 /*
1382  * Show current 802.3ad partner key.
1383  */
1384 static ssize_t bonding_show_ad_partner_key(struct device *d,
1385                                            struct device_attribute *attr,
1386                                            char *buf)
1387 {
1388         int count = 0;
1389         struct bonding *bond = to_bond(d);
1390
1391         if (bond->params.mode == BOND_MODE_8023AD) {
1392                 struct ad_info ad_info;
1393                 count = sprintf(buf, "%d\n",
1394                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1395                                 ?  0 : ad_info.partner_key);
1396         }
1397
1398         return count;
1399 }
1400 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1401
1402
1403 /*
1404  * Show current 802.3ad partner mac.
1405  */
1406 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1407                                            struct device_attribute *attr,
1408                                            char *buf)
1409 {
1410         int count = 0;
1411         struct bonding *bond = to_bond(d);
1412
1413         if (bond->params.mode == BOND_MODE_8023AD) {
1414                 struct ad_info ad_info;
1415                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1416                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1417         }
1418
1419         return count;
1420 }
1421 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1422
1423 /*
1424  * Show the queue_ids of the slaves in the current bond.
1425  */
1426 static ssize_t bonding_show_queue_id(struct device *d,
1427                                      struct device_attribute *attr,
1428                                      char *buf)
1429 {
1430         struct slave *slave;
1431         int i, res = 0;
1432         struct bonding *bond = to_bond(d);
1433
1434         if (!rtnl_trylock())
1435                 return restart_syscall();
1436
1437         read_lock(&bond->lock);
1438         bond_for_each_slave(bond, slave, i) {
1439                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1440                         /* not enough space for another interface_name:queue_id pair */
1441                         if ((PAGE_SIZE - res) > 10)
1442                                 res = PAGE_SIZE - 10;
1443                         res += sprintf(buf + res, "++more++ ");
1444                         break;
1445                 }
1446                 res += sprintf(buf + res, "%s:%d ",
1447                                slave->dev->name, slave->queue_id);
1448         }
1449         read_unlock(&bond->lock);
1450         if (res)
1451                 buf[res-1] = '\n'; /* eat the leftover space */
1452         rtnl_unlock();
1453         return res;
1454 }
1455
1456 /*
1457  * Set the queue_ids of the  slaves in the current bond.  The bond
1458  * interface must be enslaved for this to work.
1459  */
1460 static ssize_t bonding_store_queue_id(struct device *d,
1461                                       struct device_attribute *attr,
1462                                       const char *buffer, size_t count)
1463 {
1464         struct slave *slave, *update_slave;
1465         struct bonding *bond = to_bond(d);
1466         u16 qid;
1467         int i, ret = count;
1468         char *delim;
1469         struct net_device *sdev = NULL;
1470
1471         if (!rtnl_trylock())
1472                 return restart_syscall();
1473
1474         /* delim will point to queue id if successful */
1475         delim = strchr(buffer, ':');
1476         if (!delim)
1477                 goto err_no_cmd;
1478
1479         /*
1480          * Terminate string that points to device name and bump it
1481          * up one, so we can read the queue id there.
1482          */
1483         *delim = '\0';
1484         if (sscanf(++delim, "%hd\n", &qid) != 1)
1485                 goto err_no_cmd;
1486
1487         /* Check buffer length, valid ifname and queue id */
1488         if (strlen(buffer) > IFNAMSIZ ||
1489             !dev_valid_name(buffer) ||
1490             qid > bond->dev->real_num_tx_queues)
1491                 goto err_no_cmd;
1492
1493         /* Get the pointer to that interface if it exists */
1494         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1495         if (!sdev)
1496                 goto err_no_cmd;
1497
1498         read_lock(&bond->lock);
1499
1500         /* Search for thes slave and check for duplicate qids */
1501         update_slave = NULL;
1502         bond_for_each_slave(bond, slave, i) {
1503                 if (sdev == slave->dev)
1504                         /*
1505                          * We don't need to check the matching
1506                          * slave for dups, since we're overwriting it
1507                          */
1508                         update_slave = slave;
1509                 else if (qid && qid == slave->queue_id) {
1510                         goto err_no_cmd_unlock;
1511                 }
1512         }
1513
1514         if (!update_slave)
1515                 goto err_no_cmd_unlock;
1516
1517         /* Actually set the qids for the slave */
1518         update_slave->queue_id = qid;
1519
1520         read_unlock(&bond->lock);
1521 out:
1522         rtnl_unlock();
1523         return ret;
1524
1525 err_no_cmd_unlock:
1526         read_unlock(&bond->lock);
1527 err_no_cmd:
1528         pr_info("invalid input for queue_id set for %s.\n",
1529                 bond->dev->name);
1530         ret = -EPERM;
1531         goto out;
1532 }
1533
1534 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1535                    bonding_store_queue_id);
1536
1537
1538 /*
1539  * Show and set the all_slaves_active flag.
1540  */
1541 static ssize_t bonding_show_slaves_active(struct device *d,
1542                                           struct device_attribute *attr,
1543                                           char *buf)
1544 {
1545         struct bonding *bond = to_bond(d);
1546
1547         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1548 }
1549
1550 static ssize_t bonding_store_slaves_active(struct device *d,
1551                                            struct device_attribute *attr,
1552                                            const char *buf, size_t count)
1553 {
1554         int i, new_value, ret = count;
1555         struct bonding *bond = to_bond(d);
1556         struct slave *slave;
1557
1558         if (sscanf(buf, "%d", &new_value) != 1) {
1559                 pr_err("%s: no all_slaves_active value specified.\n",
1560                        bond->dev->name);
1561                 ret = -EINVAL;
1562                 goto out;
1563         }
1564
1565         if (new_value == bond->params.all_slaves_active)
1566                 goto out;
1567
1568         if ((new_value == 0) || (new_value == 1)) {
1569                 bond->params.all_slaves_active = new_value;
1570         } else {
1571                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1572                         bond->dev->name, new_value);
1573                 ret = -EINVAL;
1574                 goto out;
1575         }
1576
1577         read_lock(&bond->lock);
1578         bond_for_each_slave(bond, slave, i) {
1579                 if (!bond_is_active_slave(slave)) {
1580                         if (new_value)
1581                                 slave->inactive = 0;
1582                         else
1583                                 slave->inactive = 1;
1584                 }
1585         }
1586         read_unlock(&bond->lock);
1587 out:
1588         return ret;
1589 }
1590 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1591                    bonding_show_slaves_active, bonding_store_slaves_active);
1592
1593 /*
1594  * Show and set the number of IGMP membership reports to send on link failure
1595  */
1596 static ssize_t bonding_show_resend_igmp(struct device *d,
1597                                         struct device_attribute *attr,
1598                                         char *buf)
1599 {
1600         struct bonding *bond = to_bond(d);
1601
1602         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1603 }
1604
1605 static ssize_t bonding_store_resend_igmp(struct device *d,
1606                                          struct device_attribute *attr,
1607                                          const char *buf, size_t count)
1608 {
1609         int new_value, ret = count;
1610         struct bonding *bond = to_bond(d);
1611
1612         if (sscanf(buf, "%d", &new_value) != 1) {
1613                 pr_err("%s: no resend_igmp value specified.\n",
1614                        bond->dev->name);
1615                 ret = -EINVAL;
1616                 goto out;
1617         }
1618
1619         if (new_value < 0 || new_value > 255) {
1620                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1621                        bond->dev->name, new_value);
1622                 ret = -EINVAL;
1623                 goto out;
1624         }
1625
1626         pr_info("%s: Setting resend_igmp to %d.\n",
1627                 bond->dev->name, new_value);
1628         bond->params.resend_igmp = new_value;
1629 out:
1630         return ret;
1631 }
1632
1633 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1634                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1635
1636 static struct attribute *per_bond_attrs[] = {
1637         &dev_attr_slaves.attr,
1638         &dev_attr_mode.attr,
1639         &dev_attr_fail_over_mac.attr,
1640         &dev_attr_arp_validate.attr,
1641         &dev_attr_arp_interval.attr,
1642         &dev_attr_arp_ip_target.attr,
1643         &dev_attr_downdelay.attr,
1644         &dev_attr_updelay.attr,
1645         &dev_attr_lacp_rate.attr,
1646         &dev_attr_ad_select.attr,
1647         &dev_attr_xmit_hash_policy.attr,
1648         &dev_attr_num_grat_arp.attr,
1649         &dev_attr_num_unsol_na.attr,
1650         &dev_attr_miimon.attr,
1651         &dev_attr_primary.attr,
1652         &dev_attr_primary_reselect.attr,
1653         &dev_attr_use_carrier.attr,
1654         &dev_attr_active_slave.attr,
1655         &dev_attr_mii_status.attr,
1656         &dev_attr_ad_aggregator.attr,
1657         &dev_attr_ad_num_ports.attr,
1658         &dev_attr_ad_actor_key.attr,
1659         &dev_attr_ad_partner_key.attr,
1660         &dev_attr_ad_partner_mac.attr,
1661         &dev_attr_queue_id.attr,
1662         &dev_attr_all_slaves_active.attr,
1663         &dev_attr_resend_igmp.attr,
1664         &dev_attr_min_links.attr,
1665         NULL,
1666 };
1667
1668 static struct attribute_group bonding_group = {
1669         .name = "bonding",
1670         .attrs = per_bond_attrs,
1671 };
1672
1673 /*
1674  * Initialize sysfs.  This sets up the bonding_masters file in
1675  * /sys/class/net.
1676  */
1677 int bond_create_sysfs(struct bond_net *bn)
1678 {
1679         int ret;
1680
1681         bn->class_attr_bonding_masters = class_attr_bonding_masters;
1682         sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1683
1684         ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1685         /*
1686          * Permit multiple loads of the module by ignoring failures to
1687          * create the bonding_masters sysfs file.  Bonding devices
1688          * created by second or subsequent loads of the module will
1689          * not be listed in, or controllable by, bonding_masters, but
1690          * will have the usual "bonding" sysfs directory.
1691          *
1692          * This is done to preserve backwards compatibility for
1693          * initscripts/sysconfig, which load bonding multiple times to
1694          * configure multiple bonding devices.
1695          */
1696         if (ret == -EEXIST) {
1697                 /* Is someone being kinky and naming a device bonding_master? */
1698                 if (__dev_get_by_name(bn->net,
1699                                       class_attr_bonding_masters.attr.name))
1700                         pr_err("network device named %s already exists in sysfs",
1701                                class_attr_bonding_masters.attr.name);
1702                 ret = 0;
1703         }
1704
1705         return ret;
1706
1707 }
1708
1709 /*
1710  * Remove /sys/class/net/bonding_masters.
1711  */
1712 void bond_destroy_sysfs(struct bond_net *bn)
1713 {
1714         netdev_class_remove_file(&bn->class_attr_bonding_masters);
1715 }
1716
1717 /*
1718  * Initialize sysfs for each bond.  This sets up and registers
1719  * the 'bondctl' directory for each individual bond under /sys/class/net.
1720  */
1721 void bond_prepare_sysfs_group(struct bonding *bond)
1722 {
1723         bond->dev->sysfs_groups[0] = &bonding_group;
1724 }
1725