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/sysdev.h>
  30 #include <linux/fs.h>
  31 #include <linux/types.h>
  32 #include <linux/string.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/inetdevice.h>
  35 #include <linux/in.h>
  36 #include <linux/sysfs.h>
  37 #include <linux/ctype.h>
  38 #include <linux/inet.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/etherdevice.h>
  41 #include <net/net_namespace.h>
  42 #include <net/netns/generic.h>
  43 #include <linux/nsproxy.h>
  44
  45 #include "bonding.h"
  46
  47 #define to_dev(obj)     container_of(obj, struct device, kobj)
  48 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
  49
  50 /*
  51  * "show" function for the bond_masters attribute.
  52  * The class parameter is ignored.
  53  */
  54 static ssize_t bonding_show_bonds(struct class *cls,
  55                                   struct class_attribute *attr,
  56                                   char *buf)
  57 {
  58         struct bond_net *bn =
  59                 container_of(attr, struct bond_net, class_attr_bonding_masters);
  60         int res = 0;
  61         struct bonding *bond;
  62
  63         rtnl_lock();
  64
  65         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  66                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  67                         /* not enough space for another interface name */
  68                         if ((PAGE_SIZE - res) > 10)
  69                                 res = PAGE_SIZE - 10;
  70                         res += sprintf(buf + res, "++more++ ");
  71                         break;
  72                 }
  73                 res += sprintf(buf + res, "%s ", bond->dev->name);
  74         }
  75         if (res)
  76                 buf[res-1] = '\n'; /* eat the leftover space */
  77
  78         rtnl_unlock();
  79         return res;
  80 }
  81
  82 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
  83 {
  84         struct bonding *bond;
  85
  86         list_for_each_entry(bond, &bn->dev_list, bond_list) {
  87                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
  88                         return bond->dev;
  89         }
  90         return NULL;
  91 }
  92
  93 /*
  94  * "store" function for the bond_masters attribute.  This is what
  95  * creates and deletes entire bonds.
  96  *
  97  * The class parameter is ignored.
  98  *
  99  */
 100
 101 static ssize_t bonding_store_bonds(struct class *cls,
 102                                    struct class_attribute *attr,
 103                                    const char *buffer, size_t count)
 104 {
 105         struct bond_net *bn =
 106                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 107         char command[IFNAMSIZ + 1] = {0, };
 108         char *ifname;
 109         int rv, res = count;
 110
 111         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 112         ifname = command + 1;
 113         if ((strlen(command) <= 1) ||
 114             !dev_valid_name(ifname))
 115                 goto err_no_cmd;
 116
 117         if (command[0] == '+') {
 118                 pr_info("%s is being created...\n", ifname);
 119                 rv = bond_create(bn->net, ifname);
 120                 if (rv) {
 121                         if (rv == -EEXIST)
 122                                 pr_info("%s already exists.\n", ifname);
 123                         else
 124                                 pr_info("%s creation failed.\n", ifname);
 125                         res = rv;
 126                 }
 127         } else if (command[0] == '-') {
 128                 struct net_device *bond_dev;
 129
 130                 rtnl_lock();
 131                 bond_dev = bond_get_by_name(bn, ifname);
 132                 if (bond_dev) {
 133                         pr_info("%s is being deleted...\n", ifname);
 134                         unregister_netdevice(bond_dev);
 135                 } else {
 136                         pr_err("unable to delete non-existent %s\n", ifname);
 137                         res = -ENODEV;
 138                 }
 139                 rtnl_unlock();
 140         } else
 141                 goto err_no_cmd;
 142
 143         /* Always return either count or an error.  If you return 0, you'll
 144          * get called forever, which is bad.
 145          */
 146         return res;
 147
 148 err_no_cmd:
 149         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
 150         return -EPERM;
 151 }
 152
 153 static const void *bonding_namespace(struct class *cls,
 154                                      const struct class_attribute *attr)
 155 {
 156         const struct bond_net *bn =
 157                 container_of(attr, struct bond_net, class_attr_bonding_masters);
 158         return bn->net;
 159 }
 160
 161 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 162 static const struct class_attribute class_attr_bonding_masters = {
 163         .attr = {
 164                 .name = "bonding_masters",
 165                 .mode = S_IWUSR | S_IRUGO,
 166         },
 167         .show = bonding_show_bonds,
 168         .store = bonding_store_bonds,
 169         .namespace = bonding_namespace,
 170 };
 171
 172 int bond_create_slave_symlinks(struct net_device *master,
 173                                struct net_device *slave)
 174 {
 175         char linkname[IFNAMSIZ+7];
 176         int ret = 0;
 177
 178         /* first, create a link from the slave back to the master */
 179         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 180                                 "master");
 181         if (ret)
 182                 return ret;
 183         /* next, create a link from the master to the slave */
 184         sprintf(linkname, "slave_%s", slave->name);
 185         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 186                                 linkname);
 187
 188         /* free the master link created earlier in case of error */
 189         if (ret)
 190                 sysfs_remove_link(&(slave->dev.kobj), "master");
 191
 192         return ret;
 193
 194 }
 195
 196 void bond_destroy_slave_symlinks(struct net_device *master,
 197                                  struct net_device *slave)
 198 {
 199         char linkname[IFNAMSIZ+7];
 200
 201         sysfs_remove_link(&(slave->dev.kobj), "master");
 202         sprintf(linkname, "slave_%s", slave->name);
 203         sysfs_remove_link(&(master->dev.kobj), linkname);
 204 }
 205
 206
 207 /*
 208  * Show the slaves in the current bond.
 209  */
 210 static ssize_t bonding_show_slaves(struct device *d,
 211                                    struct device_attribute *attr, char *buf)
 212 {
 213         struct slave *slave;
 214         int i, res = 0;
 215         struct bonding *bond = to_bond(d);
 216
 217         read_lock(&bond->lock);
 218         bond_for_each_slave(bond, slave, i) {
 219                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 220                         /* not enough space for another interface name */
 221                         if ((PAGE_SIZE - res) > 10)
 222                                 res = PAGE_SIZE - 10;
 223                         res += sprintf(buf + res, "++more++ ");
 224                         break;
 225                 }
 226                 res += sprintf(buf + res, "%s ", slave->dev->name);
 227         }
 228         read_unlock(&bond->lock);
 229         if (res)
 230                 buf[res-1] = '\n'; /* eat the leftover space */
 231         return res;
 232 }
 233
 234 /*
 235  * Set the slaves in the current bond.  The bond interface must be
 236  * up for this to succeed.
 237  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
 238  * All hard work should be done there.
 239  */
 240 static ssize_t bonding_store_slaves(struct device *d,
 241                                     struct device_attribute *attr,
 242                                     const char *buffer, size_t count)
 243 {
 244         char command[IFNAMSIZ + 1] = { 0, };
 245         char *ifname;
 246         int res, ret = count;
 247         struct net_device *dev;
 248         struct bonding *bond = to_bond(d);
 249
 250         if (!rtnl_trylock())
 251                 return restart_syscall();
 252
 253         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 254         ifname = command + 1;
 255         if ((strlen(command) <= 1) ||
 256             !dev_valid_name(ifname))
 257                 goto err_no_cmd;
 258
 259         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
 260         if (!dev) {
 261                 pr_info("%s: Interface %s does not exist!\n",
 262                         bond->dev->name, ifname);
 263                 ret = -ENODEV;
 264                 goto out;
 265         }
 266
 267         switch (command[0]) {
 268         case '+':
 269                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
 270                 res = bond_enslave(bond->dev, dev);
 271                 break;
 272
 273         case '-':
 274                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
 275                 res = bond_release(bond->dev, dev);
 276                 break;
 277
 278         default:
 279                 goto err_no_cmd;
 280         }
 281
 282         if (res)
 283                 ret = res;
 284         goto out;
 285
 286 err_no_cmd:
 287         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
 288                bond->dev->name);
 289         ret = -EPERM;
 290
 291 out:
 292         rtnl_unlock();
 293         return ret;
 294 }
 295
 296 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
 297                    bonding_store_slaves);
 298
 299 /*
 300  * Show and set the bonding mode.  The bond interface must be down to
 301  * change the mode.
 302  */
 303 static ssize_t bonding_show_mode(struct device *d,
 304                                  struct device_attribute *attr, char *buf)
 305 {
 306         struct bonding *bond = to_bond(d);
 307
 308         return sprintf(buf, "%s %d\n",
 309                         bond_mode_tbl[bond->params.mode].modename,
 310                         bond->params.mode);
 311 }
 312
 313 static ssize_t bonding_store_mode(struct device *d,
 314                                   struct device_attribute *attr,
 315                                   const char *buf, size_t count)
 316 {
 317         int new_value, ret = count;
 318         struct bonding *bond = to_bond(d);
 319
 320         if (bond->dev->flags & IFF_UP) {
 321                 pr_err("unable to update mode of %s because interface is up.\n",
 322                        bond->dev->name);
 323                 ret = -EPERM;
 324                 goto out;
 325         }
 326
 327         if (bond->slave_cnt > 0) {
 328                 pr_err("unable to update mode of %s because it has slaves.\n",
 329                         bond->dev->name);
 330                 ret = -EPERM;
 331                 goto out;
 332         }
 333
 334         new_value = bond_parse_parm(buf, bond_mode_tbl);
 335         if (new_value < 0)  {
 336                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
 337                        bond->dev->name, (int)strlen(buf) - 1, buf);
 338                 ret = -EINVAL;
 339                 goto out;
 340         }
 341         if ((new_value == BOND_MODE_ALB ||
 342              new_value == BOND_MODE_TLB) &&
 343             bond->params.arp_interval) {
 344                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
 345                        bond->dev->name, bond_mode_tbl[new_value].modename);
 346                 ret = -EINVAL;
 347                 goto out;
 348         }
 349
 350         bond->params.mode = new_value;
 351         bond_set_mode_ops(bond, bond->params.mode);
 352         pr_info("%s: setting mode to %s (%d).\n",
 353                 bond->dev->name, bond_mode_tbl[new_value].modename,
 354                 new_value);
 355 out:
 356         return ret;
 357 }
 358 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
 359                    bonding_show_mode, bonding_store_mode);
 360
 361 /*
 362  * Show and set the bonding transmit hash method.
 363  * The bond interface must be down to change the xmit hash policy.
 364  */
 365 static ssize_t bonding_show_xmit_hash(struct device *d,
 366                                       struct device_attribute *attr,
 367                                       char *buf)
 368 {
 369         struct bonding *bond = to_bond(d);
 370
 371         return sprintf(buf, "%s %d\n",
 372                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 373                        bond->params.xmit_policy);
 374 }
 375
 376 static ssize_t bonding_store_xmit_hash(struct device *d,
 377                                        struct device_attribute *attr,
 378                                        const char *buf, size_t count)
 379 {
 380         int new_value, ret = count;
 381         struct bonding *bond = to_bond(d);
 382
 383         if (bond->dev->flags & IFF_UP) {
 384                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
 385                        bond->dev->name);
 386                 ret = -EPERM;
 387                 goto out;
 388         }
 389
 390         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 391         if (new_value < 0)  {
 392                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
 393                        bond->dev->name,
 394                        (int)strlen(buf) - 1, buf);
 395                 ret = -EINVAL;
 396                 goto out;
 397         } else {
 398                 bond->params.xmit_policy = new_value;
 399                 bond_set_mode_ops(bond, bond->params.mode);
 400                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
 401                         bond->dev->name,
 402                         xmit_hashtype_tbl[new_value].modename, new_value);
 403         }
 404 out:
 405         return ret;
 406 }
 407 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
 408                    bonding_show_xmit_hash, bonding_store_xmit_hash);
 409
 410 /*
 411  * Show and set arp_validate.
 412  */
 413 static ssize_t bonding_show_arp_validate(struct device *d,
 414                                          struct device_attribute *attr,
 415                                          char *buf)
 416 {
 417         struct bonding *bond = to_bond(d);
 418
 419         return sprintf(buf, "%s %d\n",
 420                        arp_validate_tbl[bond->params.arp_validate].modename,
 421                        bond->params.arp_validate);
 422 }
 423
 424 static ssize_t bonding_store_arp_validate(struct device *d,
 425                                           struct device_attribute *attr,
 426                                           const char *buf, size_t count)
 427 {
 428         int new_value;
 429         struct bonding *bond = to_bond(d);
 430
 431         new_value = bond_parse_parm(buf, arp_validate_tbl);
 432         if (new_value < 0) {
 433                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
 434                        bond->dev->name, buf);
 435                 return -EINVAL;
 436         }
 437         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 438                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
 439                        bond->dev->name);
 440                 return -EINVAL;
 441         }
 442         pr_info("%s: setting arp_validate to %s (%d).\n",
 443                 bond->dev->name, arp_validate_tbl[new_value].modename,
 444                 new_value);
 445
 446         bond->params.arp_validate = new_value;
 447
 448         return count;
 449 }
 450
 451 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
 452                    bonding_store_arp_validate);
 453
 454 /*
 455  * Show and store fail_over_mac.  User only allowed to change the
 456  * value when there are no slaves.
 457  */
 458 static ssize_t bonding_show_fail_over_mac(struct device *d,
 459                                           struct device_attribute *attr,
 460                                           char *buf)
 461 {
 462         struct bonding *bond = to_bond(d);
 463
 464         return sprintf(buf, "%s %d\n",
 465                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 466                        bond->params.fail_over_mac);
 467 }
 468
 469 static ssize_t bonding_store_fail_over_mac(struct device *d,
 470                                            struct device_attribute *attr,
 471                                            const char *buf, size_t count)
 472 {
 473         int new_value;
 474         struct bonding *bond = to_bond(d);
 475
 476         if (bond->slave_cnt != 0) {
 477                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
 478                        bond->dev->name);
 479                 return -EPERM;
 480         }
 481
 482         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 483         if (new_value < 0) {
 484                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
 485                        bond->dev->name, buf);
 486                 return -EINVAL;
 487         }
 488
 489         bond->params.fail_over_mac = new_value;
 490         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
 491                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
 492                 new_value);
 493
 494         return count;
 495 }
 496
 497 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
 498                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 499
 500 /*
 501  * Show and set the arp timer interval.  There are two tricky bits
 502  * here.  First, if ARP monitoring is activated, then we must disable
 503  * MII monitoring.  Second, if the ARP timer isn't running, we must
 504  * start it.
 505  */
 506 static ssize_t bonding_show_arp_interval(struct device *d,
 507                                          struct device_attribute *attr,
 508                                          char *buf)
 509 {
 510         struct bonding *bond = to_bond(d);
 511
 512         return sprintf(buf, "%d\n", bond->params.arp_interval);
 513 }
 514
 515 static ssize_t bonding_store_arp_interval(struct device *d,
 516                                           struct device_attribute *attr,
 517                                           const char *buf, size_t count)
 518 {
 519         int new_value, ret = count;
 520         struct bonding *bond = to_bond(d);
 521
 522         if (!rtnl_trylock())
 523                 return restart_syscall();
 524         if (sscanf(buf, "%d", &new_value) != 1) {
 525                 pr_err("%s: no arp_interval value specified.\n",
 526                        bond->dev->name);
 527                 ret = -EINVAL;
 528                 goto out;
 529         }
 530         if (new_value < 0) {
 531                 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
 532                        bond->dev->name, new_value, INT_MAX);
 533                 ret = -EINVAL;
 534                 goto out;
 535         }
 536         if (bond->params.mode == BOND_MODE_ALB ||
 537             bond->params.mode == BOND_MODE_TLB) {
 538                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
 539                         bond->dev->name, bond->dev->name);
 540                 ret = -EINVAL;
 541                 goto out;
 542         }
 543         pr_info("%s: Setting ARP monitoring interval to %d.\n",
 544                 bond->dev->name, new_value);
 545         bond->params.arp_interval = new_value;
 546         if (new_value) {
 547                 if (bond->params.miimon) {
 548                         pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
 549                                 bond->dev->name, bond->dev->name);
 550                         bond->params.miimon = 0;
 551                 }
 552                 if (!bond->params.arp_targets[0])
 553                         pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
 554                                 bond->dev->name);
 555         }
 556         if (bond->dev->flags & IFF_UP) {
 557                 /* If the interface is up, we may need to fire off
 558                  * the ARP timer.  If the interface is down, the
 559                  * timer will get fired off when the open function
 560                  * is called.
 561                  */
 562                 if (!new_value) {
 563                         cancel_delayed_work_sync(&bond->arp_work);
 564                 } else {
 565                         cancel_delayed_work_sync(&bond->mii_work);
 566                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 567                 }
 568         }
 569 out:
 570         rtnl_unlock();
 571         return ret;
 572 }
 573 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
 574                    bonding_show_arp_interval, bonding_store_arp_interval);
 575
 576 /*
 577  * Show and set the arp targets.
 578  */
 579 static ssize_t bonding_show_arp_targets(struct device *d,
 580                                         struct device_attribute *attr,
 581                                         char *buf)
 582 {
 583         int i, res = 0;
 584         struct bonding *bond = to_bond(d);
 585
 586         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 587                 if (bond->params.arp_targets[i])
 588                         res += sprintf(buf + res, "%pI4 ",
 589                                        &bond->params.arp_targets[i]);
 590         }
 591         if (res)
 592                 buf[res-1] = '\n'; /* eat the leftover space */
 593         return res;
 594 }
 595
 596 static ssize_t bonding_store_arp_targets(struct device *d,
 597                                          struct device_attribute *attr,
 598                                          const char *buf, size_t count)
 599 {
 600         __be32 newtarget;
 601         int i = 0, done = 0, ret = count;
 602         struct bonding *bond = to_bond(d);
 603         __be32 *targets;
 604
 605         targets = bond->params.arp_targets;
 606         newtarget = in_aton(buf + 1);
 607         /* look for adds */
 608         if (buf[0] == '+') {
 609                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 610                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
 611                                bond->dev->name, &newtarget);
 612                         ret = -EINVAL;
 613                         goto out;
 614                 }
 615                 /* look for an empty slot to put the target in, and check for dupes */
 616                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 617                         if (targets[i] == newtarget) { /* duplicate */
 618                                 pr_err("%s: ARP target %pI4 is already present\n",
 619                                        bond->dev->name, &newtarget);
 620                                 ret = -EINVAL;
 621                                 goto out;
 622                         }
 623                         if (targets[i] == 0) {
 624                                 pr_info("%s: adding ARP target %pI4.\n",
 625                                         bond->dev->name, &newtarget);
 626                                 done = 1;
 627                                 targets[i] = newtarget;
 628                         }
 629                 }
 630                 if (!done) {
 631                         pr_err("%s: ARP target table is full!\n",
 632                                bond->dev->name);
 633                         ret = -EINVAL;
 634                         goto out;
 635                 }
 636
 637         } else if (buf[0] == '-')       {
 638                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 639                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
 640                                bond->dev->name, &newtarget);
 641                         ret = -EINVAL;
 642                         goto out;
 643                 }
 644
 645                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
 646                         if (targets[i] == newtarget) {
 647                                 int j;
 648                                 pr_info("%s: removing ARP target %pI4.\n",
 649                                         bond->dev->name, &newtarget);
 650                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
 651                                         targets[j] = targets[j+1];
 652
 653                                 targets[j] = 0;
 654                                 done = 1;
 655                         }
 656                 }
 657                 if (!done) {
 658                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
 659                                 bond->dev->name, &newtarget);
 660                         ret = -EINVAL;
 661                         goto out;
 662                 }
 663         } else {
 664                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 665                        bond->dev->name);
 666                 ret = -EPERM;
 667                 goto out;
 668         }
 669
 670 out:
 671         return ret;
 672 }
 673 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 674
 675 /*
 676  * Show and set the up and down delays.  These must be multiples of the
 677  * MII monitoring value, and are stored internally as the multiplier.
 678  * Thus, we must translate to MS for the real world.
 679  */
 680 static ssize_t bonding_show_downdelay(struct device *d,
 681                                       struct device_attribute *attr,
 682                                       char *buf)
 683 {
 684         struct bonding *bond = to_bond(d);
 685
 686         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 687 }
 688
 689 static ssize_t bonding_store_downdelay(struct device *d,
 690                                        struct device_attribute *attr,
 691                                        const char *buf, size_t count)
 692 {
 693         int new_value, ret = count;
 694         struct bonding *bond = to_bond(d);
 695
 696         if (!(bond->params.miimon)) {
 697                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
 698                        bond->dev->name);
 699                 ret = -EPERM;
 700                 goto out;
 701         }
 702
 703         if (sscanf(buf, "%d", &new_value) != 1) {
 704                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
 705                 ret = -EINVAL;
 706                 goto out;
 707         }
 708         if (new_value < 0) {
 709                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 710                        bond->dev->name, new_value, 0, INT_MAX);
 711                 ret = -EINVAL;
 712                 goto out;
 713         } else {
 714                 if ((new_value % bond->params.miimon) != 0) {
 715                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
 716                                    bond->dev->name, new_value,
 717                                    bond->params.miimon,
 718                                    (new_value / bond->params.miimon) *
 719                                    bond->params.miimon);
 720                 }
 721                 bond->params.downdelay = new_value / bond->params.miimon;
 722                 pr_info("%s: Setting down delay to %d.\n",
 723                         bond->dev->name,
 724                         bond->params.downdelay * bond->params.miimon);
 725
 726         }
 727
 728 out:
 729         return ret;
 730 }
 731 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
 732                    bonding_show_downdelay, bonding_store_downdelay);
 733
 734 static ssize_t bonding_show_updelay(struct device *d,
 735                                     struct device_attribute *attr,
 736                                     char *buf)
 737 {
 738         struct bonding *bond = to_bond(d);
 739
 740         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 741
 742 }
 743
 744 static ssize_t bonding_store_updelay(struct device *d,
 745                                      struct device_attribute *attr,
 746                                      const char *buf, size_t count)
 747 {
 748         int new_value, ret = count;
 749         struct bonding *bond = to_bond(d);
 750
 751         if (!(bond->params.miimon)) {
 752                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
 753                        bond->dev->name);
 754                 ret = -EPERM;
 755                 goto out;
 756         }
 757
 758         if (sscanf(buf, "%d", &new_value) != 1) {
 759                 pr_err("%s: no up delay value specified.\n",
 760                        bond->dev->name);
 761                 ret = -EINVAL;
 762                 goto out;
 763         }
 764         if (new_value < 0) {
 765                 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
 766                        bond->dev->name, new_value, 0, INT_MAX);
 767                 ret = -EINVAL;
 768                 goto out;
 769         } else {
 770                 if ((new_value % bond->params.miimon) != 0) {
 771                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
 772                                    bond->dev->name, new_value,
 773                                    bond->params.miimon,
 774                                    (new_value / bond->params.miimon) *
 775                                    bond->params.miimon);
 776                 }
 777                 bond->params.updelay = new_value / bond->params.miimon;
 778                 pr_info("%s: Setting up delay to %d.\n",
 779                         bond->dev->name,
 780                         bond->params.updelay * bond->params.miimon);
 781         }
 782
 783 out:
 784         return ret;
 785 }
 786 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
 787                    bonding_show_updelay, bonding_store_updelay);
 788
 789 /*
 790  * Show and set the LACP interval.  Interface must be down, and the mode
 791  * must be set to 802.3ad mode.
 792  */
 793 static ssize_t bonding_show_lacp(struct device *d,
 794                                  struct device_attribute *attr,
 795                                  char *buf)
 796 {
 797         struct bonding *bond = to_bond(d);
 798
 799         return sprintf(buf, "%s %d\n",
 800                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 801                 bond->params.lacp_fast);
 802 }
 803
 804 static ssize_t bonding_store_lacp(struct device *d,
 805                                   struct device_attribute *attr,
 806                                   const char *buf, size_t count)
 807 {
 808         int new_value, ret = count;
 809         struct bonding *bond = to_bond(d);
 810
 811         if (bond->dev->flags & IFF_UP) {
 812                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
 813                        bond->dev->name);
 814                 ret = -EPERM;
 815                 goto out;
 816         }
 817
 818         if (bond->params.mode != BOND_MODE_8023AD) {
 819                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 820                        bond->dev->name);
 821                 ret = -EPERM;
 822                 goto out;
 823         }
 824
 825         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 826
 827         if ((new_value == 1) || (new_value == 0)) {
 828                 bond->params.lacp_fast = new_value;
 829                 bond_3ad_update_lacp_rate(bond);
 830                 pr_info("%s: Setting LACP rate to %s (%d).\n",
 831                         bond->dev->name, bond_lacp_tbl[new_value].modename,
 832                         new_value);
 833         } else {
 834                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
 835                        bond->dev->name, (int)strlen(buf) - 1, buf);
 836                 ret = -EINVAL;
 837         }
 838 out:
 839         return ret;
 840 }
 841 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
 842                    bonding_show_lacp, bonding_store_lacp);
 843
 844 static ssize_t bonding_show_min_links(struct device *d,
 845                                       struct device_attribute *attr,
 846                                       char *buf)
 847 {
 848         struct bonding *bond = to_bond(d);
 849
 850         return sprintf(buf, "%d\n", bond->params.min_links);
 851 }
 852
 853 static ssize_t bonding_store_min_links(struct device *d,
 854                                        struct device_attribute *attr,
 855                                        const char *buf, size_t count)
 856 {
 857         struct bonding *bond = to_bond(d);
 858         int ret;
 859         unsigned int new_value;
 860
 861         ret = kstrtouint(buf, 0, &new_value);
 862         if (ret < 0) {
 863                 pr_err("%s: Ignoring invalid min links value %s.\n",
 864                        bond->dev->name, buf);
 865                 return ret;
 866         }
 867
 868         pr_info("%s: Setting min links value to %u\n",
 869                 bond->dev->name, new_value);
 870         bond->params.min_links = new_value;
 871         return count;
 872 }
 873 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
 874                    bonding_show_min_links, bonding_store_min_links);
 875
 876 static ssize_t bonding_show_ad_select(struct device *d,
 877                                       struct device_attribute *attr,
 878                                       char *buf)
 879 {
 880         struct bonding *bond = to_bond(d);
 881
 882         return sprintf(buf, "%s %d\n",
 883                 ad_select_tbl[bond->params.ad_select].modename,
 884                 bond->params.ad_select);
 885 }
 886
 887
 888 static ssize_t bonding_store_ad_select(struct device *d,
 889                                        struct device_attribute *attr,
 890                                        const char *buf, size_t count)
 891 {
 892         int new_value, ret = count;
 893         struct bonding *bond = to_bond(d);
 894
 895         if (bond->dev->flags & IFF_UP) {
 896                 pr_err("%s: Unable to update ad_select because interface is up.\n",
 897                        bond->dev->name);
 898                 ret = -EPERM;
 899                 goto out;
 900         }
 901
 902         new_value = bond_parse_parm(buf, ad_select_tbl);
 903
 904         if (new_value != -1) {
 905                 bond->params.ad_select = new_value;
 906                 pr_info("%s: Setting ad_select to %s (%d).\n",
 907                         bond->dev->name, ad_select_tbl[new_value].modename,
 908                         new_value);
 909         } else {
 910                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
 911                        bond->dev->name, (int)strlen(buf) - 1, buf);
 912                 ret = -EINVAL;
 913         }
 914 out:
 915         return ret;
 916 }
 917 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
 918                    bonding_show_ad_select, bonding_store_ad_select);
 919
 920 /*
 921  * Show and set the number of peer notifications to send after a failover event.
 922  */
 923 static ssize_t bonding_show_num_peer_notif(struct device *d,
 924                                            struct device_attribute *attr,
 925                                            char *buf)
 926 {
 927         struct bonding *bond = to_bond(d);
 928         return sprintf(buf, "%d\n", bond->params.num_peer_notif);
 929 }
 930
 931 static ssize_t bonding_store_num_peer_notif(struct device *d,
 932                                             struct device_attribute *attr,
 933                                             const char *buf, size_t count)
 934 {
 935         struct bonding *bond = to_bond(d);
 936         int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
 937         return err ? err : count;
 938 }
 939 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
 940                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 941 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
 942                    bonding_show_num_peer_notif, bonding_store_num_peer_notif);
 943
 944 /*
 945  * Show and set the MII monitor interval.  There are two tricky bits
 946  * here.  First, if MII monitoring is activated, then we must disable
 947  * ARP monitoring.  Second, if the timer isn't running, we must
 948  * start it.
 949  */
 950 static ssize_t bonding_show_miimon(struct device *d,
 951                                    struct device_attribute *attr,
 952                                    char *buf)
 953 {
 954         struct bonding *bond = to_bond(d);
 955
 956         return sprintf(buf, "%d\n", bond->params.miimon);
 957 }
 958
 959 static ssize_t bonding_store_miimon(struct device *d,
 960                                     struct device_attribute *attr,
 961                                     const char *buf, size_t count)
 962 {
 963         int new_value, ret = count;
 964         struct bonding *bond = to_bond(d);
 965
 966         if (!rtnl_trylock())
 967                 return restart_syscall();
 968         if (sscanf(buf, "%d", &new_value) != 1) {
 969                 pr_err("%s: no miimon value specified.\n",
 970                        bond->dev->name);
 971                 ret = -EINVAL;
 972                 goto out;
 973         }
 974         if (new_value < 0) {
 975                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 976                        bond->dev->name, new_value, 0, INT_MAX);
 977                 ret = -EINVAL;
 978                 goto out;
 979         }
 980         pr_info("%s: Setting MII monitoring interval to %d.\n",
 981                 bond->dev->name, new_value);
 982         bond->params.miimon = new_value;
 983         if (bond->params.updelay)
 984                 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
 985                         bond->dev->name,
 986                         bond->params.updelay * bond->params.miimon);
 987         if (bond->params.downdelay)
 988                 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
 989                         bond->dev->name,
 990                         bond->params.downdelay * bond->params.miimon);
 991         if (new_value && bond->params.arp_interval) {
 992                 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
 993                         bond->dev->name);
 994                 bond->params.arp_interval = 0;
 995                 if (bond->params.arp_validate)
 996                         bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
 997         }
 998         if (bond->dev->flags & IFF_UP) {
 999                 /* If the interface is up, we may need to fire off
1000                  * the MII timer. If the interface is down, the
1001                  * timer will get fired off when the open function
1002                  * is called.
1003                  */
1004                 if (!new_value) {
1005                         cancel_delayed_work_sync(&bond->mii_work);
1006                 } else {
1007                         cancel_delayed_work_sync(&bond->arp_work);
1008                         queue_delayed_work(bond->wq, &bond->mii_work, 0);
1009                 }
1010         }
1011 out:
1012         rtnl_unlock();
1013         return ret;
1014 }
1015 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1016                    bonding_show_miimon, bonding_store_miimon);
1017
1018 /*
1019  * Show and set the primary slave.  The store function is much
1020  * simpler than bonding_store_slaves function because it only needs to
1021  * handle one interface name.
1022  * The bond must be a mode that supports a primary for this be
1023  * set.
1024  */
1025 static ssize_t bonding_show_primary(struct device *d,
1026                                     struct device_attribute *attr,
1027                                     char *buf)
1028 {
1029         int count = 0;
1030         struct bonding *bond = to_bond(d);
1031
1032         if (bond->primary_slave)
1033                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1034
1035         return count;
1036 }
1037
1038 static ssize_t bonding_store_primary(struct device *d,
1039                                      struct device_attribute *attr,
1040                                      const char *buf, size_t count)
1041 {
1042         int i;
1043         struct slave *slave;
1044         struct bonding *bond = to_bond(d);
1045         char ifname[IFNAMSIZ];
1046
1047         if (!rtnl_trylock())
1048                 return restart_syscall();
1049         block_netpoll_tx();
1050         read_lock(&bond->lock);
1051         write_lock_bh(&bond->curr_slave_lock);
1052
1053         if (!USES_PRIMARY(bond->params.mode)) {
1054                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1055                         bond->dev->name, bond->dev->name, bond->params.mode);
1056                 goto out;
1057         }
1058
1059         sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1060
1061         /* check to see if we are clearing primary */
1062         if (!strlen(ifname) || buf[0] == '\n') {
1063                 pr_info("%s: Setting primary slave to None.\n",
1064                         bond->dev->name);
1065                 bond->primary_slave = NULL;
1066                 bond_select_active_slave(bond);
1067                 goto out;
1068         }
1069
1070         bond_for_each_slave(bond, slave, i) {
1071                 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1072                         pr_info("%s: Setting %s as primary slave.\n",
1073                                 bond->dev->name, slave->dev->name);
1074                         bond->primary_slave = slave;
1075                         strcpy(bond->params.primary, slave->dev->name);
1076                         bond_select_active_slave(bond);
1077                         goto out;
1078                 }
1079         }
1080
1081         pr_info("%s: Unable to set %.*s as primary slave.\n",
1082                 bond->dev->name, (int)strlen(buf) - 1, buf);
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, "%16s", 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->params.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