err.no Git - linux-2.6/blob - drivers/net/bonding/bond_sysfs.c

   1
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  */
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/device.h>
  26 #include <linux/sysdev.h>
  27 #include <linux/fs.h>
  28 #include <linux/types.h>
  29 #include <linux/string.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/inetdevice.h>
  32 #include <linux/in.h>
  33 #include <linux/sysfs.h>
  34 #include <linux/ctype.h>
  35 #include <linux/inet.h>
  36 #include <linux/rtnetlink.h>
  37 #include <net/net_namespace.h>
  38
  39 /* #define BONDING_DEBUG 1 */
  40 #include "bonding.h"
  41 #define to_dev(obj)     container_of(obj,struct device,kobj)
  42 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  43
  44 /*---------------------------- Declarations -------------------------------*/
  45
  46
  47 extern struct list_head bond_dev_list;
  48 extern struct bond_params bonding_defaults;
  49 extern struct bond_parm_tbl bond_mode_tbl[];
  50 extern struct bond_parm_tbl bond_lacp_tbl[];
  51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  52 extern struct bond_parm_tbl arp_validate_tbl[];
  53
  54 static int expected_refcount = -1;
  55 static struct class *netdev_class;
  56 /*--------------------------- Data Structures -----------------------------*/
  57
  58 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
  59  * Because kobject_register tries to acquire the subsystem lock.  If
  60  * we already hold the lock (which we would if the user was creating
  61  * a new bond through the sysfs interface), we deadlock.
  62  * This lock is only needed when deleting a bond - we need to make sure
  63  * that we don't collide with an ongoing ioctl.
  64  */
  65
  66 struct rw_semaphore bonding_rwsem;
  67
  68
  69
  70
  71 /*------------------------------ Functions --------------------------------*/
  72
  73 /*
  74  * "show" function for the bond_masters attribute.
  75  * The class parameter is ignored.
  76  */
  77 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
  78 {
  79         int res = 0;
  80         struct bonding *bond;
  81
  82         down_read(&(bonding_rwsem));
  83
  84         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  85                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  86                         /* not enough space for another interface name */
  87                         if ((PAGE_SIZE - res) > 10)
  88                                 res = PAGE_SIZE - 10;
  89                         res += sprintf(buf + res, "++more++ ");
  90                         break;
  91                 }
  92                 res += sprintf(buf + res, "%s ", bond->dev->name);
  93         }
  94         if (res)
  95                 buf[res-1] = '\n'; /* eat the leftover space */
  96         up_read(&(bonding_rwsem));
  97         return res;
  98 }
  99
 100 /*
 101  * "store" function for the bond_masters attribute.  This is what
 102  * creates and deletes entire bonds.
 103  *
 104  * The class parameter is ignored.
 105  *
 106  */
 107
 108 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 109 {
 110         char command[IFNAMSIZ + 1] = {0, };
 111         char *ifname;
 112         int res = count;
 113         struct bonding *bond;
 114         struct bonding *nxt;
 115
 116         down_write(&(bonding_rwsem));
 117         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 118         ifname = command + 1;
 119         if ((strlen(command) <= 1) ||
 120             !dev_valid_name(ifname))
 121                 goto err_no_cmd;
 122
 123         if (command[0] == '+') {
 124
 125                 /* Check to see if the bond already exists. */
 126                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 127                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 128                                 printk(KERN_ERR DRV_NAME
 129                                         ": cannot add bond %s; it already exists\n",
 130                                         ifname);
 131                                 res = -EPERM;
 132                                 goto out;
 133                         }
 134
 135                 printk(KERN_INFO DRV_NAME
 136                         ": %s is being created...\n", ifname);
 137                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 138                         printk(KERN_INFO DRV_NAME
 139                         ": %s interface already exists. Bond creation failed.\n",
 140                         ifname);
 141                         res = -EPERM;
 142                 }
 143                 goto out;
 144         }
 145
 146         if (command[0] == '-') {
 147                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 148                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 149                                 rtnl_lock();
 150                                 /* check the ref count on the bond's kobject.
 151                                  * If it's > expected, then there's a file open,
 152                                  * and we have to fail.
 153                                  */
 154                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 155                                                         > expected_refcount){
 156                                         rtnl_unlock();
 157                                         printk(KERN_INFO DRV_NAME
 158                                                 ": Unable remove bond %s due to open references.\n",
 159                                                 ifname);
 160                                         res = -EPERM;
 161                                         goto out;
 162                                 }
 163                                 printk(KERN_INFO DRV_NAME
 164                                         ": %s is being deleted...\n",
 165                                         bond->dev->name);
 166                                 bond_destroy(bond);
 167                                 rtnl_unlock();
 168                                 goto out;
 169                         }
 170
 171                 printk(KERN_ERR DRV_NAME
 172                         ": unable to delete non-existent bond %s\n", ifname);
 173                 res = -ENODEV;
 174                 goto out;
 175         }
 176
 177 err_no_cmd:
 178         printk(KERN_ERR DRV_NAME
 179                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 180         res = -EPERM;
 181
 182         /* Always return either count or an error.  If you return 0, you'll
 183          * get called forever, which is bad.
 184          */
 185 out:
 186         up_write(&(bonding_rwsem));
 187         return res;
 188 }
 189 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 190 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 191                   bonding_show_bonds, bonding_store_bonds);
 192
 193 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 194 {
 195         char linkname[IFNAMSIZ+7];
 196         int ret = 0;
 197
 198         /* first, create a link from the slave back to the master */
 199         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 200                                 "master");
 201         if (ret)
 202                 return ret;
 203         /* next, create a link from the master to the slave */
 204         sprintf(linkname,"slave_%s",slave->name);
 205         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 206                                 linkname);
 207         return ret;
 208
 209 }
 210
 211 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 212 {
 213         char linkname[IFNAMSIZ+7];
 214
 215         sysfs_remove_link(&(slave->dev.kobj), "master");
 216         sprintf(linkname,"slave_%s",slave->name);
 217         sysfs_remove_link(&(master->dev.kobj), linkname);
 218 }
 219
 220
 221 /*
 222  * Show the slaves in the current bond.
 223  */
 224 static ssize_t bonding_show_slaves(struct device *d,
 225                                    struct device_attribute *attr, char *buf)
 226 {
 227         struct slave *slave;
 228         int i, res = 0;
 229         struct bonding *bond = to_bond(d);
 230
 231         read_lock(&bond->lock);
 232         bond_for_each_slave(bond, slave, i) {
 233                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 234                         /* not enough space for another interface name */
 235                         if ((PAGE_SIZE - res) > 10)
 236                                 res = PAGE_SIZE - 10;
 237                         res += sprintf(buf + res, "++more++ ");
 238                         break;
 239                 }
 240                 res += sprintf(buf + res, "%s ", slave->dev->name);
 241         }
 242         read_unlock(&bond->lock);
 243         if (res)
 244                 buf[res-1] = '\n'; /* eat the leftover space */
 245         return res;
 246 }
 247
 248 /*
 249  * Set the slaves in the current bond.  The bond interface must be
 250  * up for this to succeed.
 251  * This function is largely the same flow as bonding_update_bonds().
 252  */
 253 static ssize_t bonding_store_slaves(struct device *d,
 254                                     struct device_attribute *attr,
 255                                     const char *buffer, size_t count)
 256 {
 257         char command[IFNAMSIZ + 1] = { 0, };
 258         char *ifname;
 259         int i, res, found, ret = count;
 260         u32 original_mtu;
 261         struct slave *slave;
 262         struct net_device *dev = NULL;
 263         struct bonding *bond = to_bond(d);
 264
 265         /* Quick sanity check -- is the bond interface up? */
 266         if (!(bond->dev->flags & IFF_UP)) {
 267                 printk(KERN_WARNING DRV_NAME
 268                        ": %s: doing slave updates when interface is down.\n",
 269                        bond->dev->name);
 270         }
 271
 272         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 273
 274         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 275         ifname = command + 1;
 276         if ((strlen(command) <= 1) ||
 277             !dev_valid_name(ifname))
 278                 goto err_no_cmd;
 279
 280         if (command[0] == '+') {
 281
 282                 /* Got a slave name in ifname.  Is it already in the list? */
 283                 found = 0;
 284                 read_lock(&bond->lock);
 285                 bond_for_each_slave(bond, slave, i)
 286                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 287                                 printk(KERN_ERR DRV_NAME
 288                                        ": %s: Interface %s is already enslaved!\n",
 289                                        bond->dev->name, ifname);
 290                                 ret = -EPERM;
 291                                 read_unlock(&bond->lock);
 292                                 goto out;
 293                         }
 294
 295                 read_unlock(&bond->lock);
 296                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 297                        bond->dev->name, ifname);
 298                 dev = dev_get_by_name(&init_net, ifname);
 299                 if (!dev) {
 300                         printk(KERN_INFO DRV_NAME
 301                                ": %s: Interface %s does not exist!\n",
 302                                bond->dev->name, ifname);
 303                         ret = -EPERM;
 304                         goto out;
 305                 }
 306                 else
 307                         dev_put(dev);
 308
 309                 if (dev->flags & IFF_UP) {
 310                         printk(KERN_ERR DRV_NAME
 311                                ": %s: Error: Unable to enslave %s "
 312                                "because it is already up.\n",
 313                                bond->dev->name, dev->name);
 314                         ret = -EPERM;
 315                         goto out;
 316                 }
 317                 /* If this is the first slave, then we need to set
 318                    the master's hardware address to be the same as the
 319                    slave's. */
 320                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 321                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 322                                dev->addr_len);
 323                 }
 324
 325                 /* Set the slave's MTU to match the bond */
 326                 original_mtu = dev->mtu;
 327                 if (dev->mtu != bond->dev->mtu) {
 328                         if (dev->change_mtu) {
 329                                 res = dev->change_mtu(dev,
 330                                                       bond->dev->mtu);
 331                                 if (res) {
 332                                         ret = res;
 333                                         goto out;
 334                                 }
 335                         } else {
 336                                 dev->mtu = bond->dev->mtu;
 337                         }
 338                 }
 339                 rtnl_lock();
 340                 res = bond_enslave(bond->dev, dev);
 341                 bond_for_each_slave(bond, slave, i)
 342                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 343                                 slave->original_mtu = original_mtu;
 344                 rtnl_unlock();
 345                 if (res) {
 346                         ret = res;
 347                 }
 348                 goto out;
 349         }
 350
 351         if (command[0] == '-') {
 352                 dev = NULL;
 353                 bond_for_each_slave(bond, slave, i)
 354                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 355                                 dev = slave->dev;
 356                                 original_mtu = slave->original_mtu;
 357                                 break;
 358                         }
 359                 if (dev) {
 360                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 361                                 bond->dev->name, dev->name);
 362                         rtnl_lock();
 363                         if (bond->setup_by_slave)
 364                                 res = bond_release_and_destroy(bond->dev, dev);
 365                         else
 366                                 res = bond_release(bond->dev, dev);
 367                         rtnl_unlock();
 368                         if (res) {
 369                                 ret = res;
 370                                 goto out;
 371                         }
 372                         /* set the slave MTU to the default */
 373                         if (dev->change_mtu) {
 374                                 dev->change_mtu(dev, original_mtu);
 375                         } else {
 376                                 dev->mtu = original_mtu;
 377                         }
 378                 }
 379                 else {
 380                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 381                                 ifname, bond->dev->name);
 382                         ret = -ENODEV;
 383                 }
 384                 goto out;
 385         }
 386
 387 err_no_cmd:
 388         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 389         ret = -EPERM;
 390
 391 out:
 392         return ret;
 393 }
 394
 395 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 396
 397 /*
 398  * Show and set the bonding mode.  The bond interface must be down to
 399  * change the mode.
 400  */
 401 static ssize_t bonding_show_mode(struct device *d,
 402                                  struct device_attribute *attr, char *buf)
 403 {
 404         struct bonding *bond = to_bond(d);
 405
 406         return sprintf(buf, "%s %d\n",
 407                         bond_mode_tbl[bond->params.mode].modename,
 408                         bond->params.mode);
 409 }
 410
 411 static ssize_t bonding_store_mode(struct device *d,
 412                                   struct device_attribute *attr,
 413                                   const char *buf, size_t count)
 414 {
 415         int new_value, ret = count;
 416         struct bonding *bond = to_bond(d);
 417
 418         if (bond->dev->flags & IFF_UP) {
 419                 printk(KERN_ERR DRV_NAME
 420                        ": unable to update mode of %s because interface is up.\n",
 421                        bond->dev->name);
 422                 ret = -EPERM;
 423                 goto out;
 424         }
 425
 426         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 427         if (new_value < 0)  {
 428                 printk(KERN_ERR DRV_NAME
 429                        ": %s: Ignoring invalid mode value %.*s.\n",
 430                        bond->dev->name,
 431                        (int)strlen(buf) - 1, buf);
 432                 ret = -EINVAL;
 433                 goto out;
 434         } else {
 435                 if (bond->params.mode == BOND_MODE_8023AD)
 436                         bond_unset_master_3ad_flags(bond);
 437
 438                 if (bond->params.mode == BOND_MODE_ALB)
 439                         bond_unset_master_alb_flags(bond);
 440
 441                 bond->params.mode = new_value;
 442                 bond_set_mode_ops(bond, bond->params.mode);
 443                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 444                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 445         }
 446 out:
 447         return ret;
 448 }
 449 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 450
 451 /*
 452  * Show and set the bonding transmit hash method.  The bond interface must be down to
 453  * change the xmit hash policy.
 454  */
 455 static ssize_t bonding_show_xmit_hash(struct device *d,
 456                                       struct device_attribute *attr,
 457                                       char *buf)
 458 {
 459         int count = 0;
 460         struct bonding *bond = to_bond(d);
 461
 462         if ((bond->params.mode == BOND_MODE_XOR) ||
 463             (bond->params.mode == BOND_MODE_8023AD)) {
 464                 count = sprintf(buf, "%s %d\n",
 465                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 466                         bond->params.xmit_policy);
 467         }
 468
 469         return count;
 470 }
 471
 472 static ssize_t bonding_store_xmit_hash(struct device *d,
 473                                        struct device_attribute *attr,
 474                                        const char *buf, size_t count)
 475 {
 476         int new_value, ret = count;
 477         struct bonding *bond = to_bond(d);
 478
 479         if (bond->dev->flags & IFF_UP) {
 480                 printk(KERN_ERR DRV_NAME
 481                        "%s: Interface is up. Unable to update xmit policy.\n",
 482                        bond->dev->name);
 483                 ret = -EPERM;
 484                 goto out;
 485         }
 486
 487         if ((bond->params.mode != BOND_MODE_XOR) &&
 488             (bond->params.mode != BOND_MODE_8023AD)) {
 489                 printk(KERN_ERR DRV_NAME
 490                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 491                        bond->dev->name);
 492                 ret = -EPERM;
 493                 goto out;
 494         }
 495
 496         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 497         if (new_value < 0)  {
 498                 printk(KERN_ERR DRV_NAME
 499                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 500                        bond->dev->name,
 501                        (int)strlen(buf) - 1, buf);
 502                 ret = -EINVAL;
 503                 goto out;
 504         } else {
 505                 bond->params.xmit_policy = new_value;
 506                 bond_set_mode_ops(bond, bond->params.mode);
 507                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 508                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 509         }
 510 out:
 511         return ret;
 512 }
 513 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 514
 515 /*
 516  * Show and set arp_validate.
 517  */
 518 static ssize_t bonding_show_arp_validate(struct device *d,
 519                                          struct device_attribute *attr,
 520                                          char *buf)
 521 {
 522         struct bonding *bond = to_bond(d);
 523
 524         return sprintf(buf, "%s %d\n",
 525                        arp_validate_tbl[bond->params.arp_validate].modename,
 526                        bond->params.arp_validate);
 527 }
 528
 529 static ssize_t bonding_store_arp_validate(struct device *d,
 530                                           struct device_attribute *attr,
 531                                           const char *buf, size_t count)
 532 {
 533         int new_value;
 534         struct bonding *bond = to_bond(d);
 535
 536         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
 537         if (new_value < 0) {
 538                 printk(KERN_ERR DRV_NAME
 539                        ": %s: Ignoring invalid arp_validate value %s\n",
 540                        bond->dev->name, buf);
 541                 return -EINVAL;
 542         }
 543         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 544                 printk(KERN_ERR DRV_NAME
 545                        ": %s: arp_validate only supported in active-backup mode.\n",
 546                        bond->dev->name);
 547                 return -EINVAL;
 548         }
 549         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 550                bond->dev->name, arp_validate_tbl[new_value].modename,
 551                new_value);
 552
 553         if (!bond->params.arp_validate && new_value) {
 554                 bond_register_arp(bond);
 555         } else if (bond->params.arp_validate && !new_value) {
 556                 bond_unregister_arp(bond);
 557         }
 558
 559         bond->params.arp_validate = new_value;
 560
 561         return count;
 562 }
 563
 564 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 565
 566 /*
 567  * Show and store fail_over_mac.  User only allowed to change the
 568  * value when there are no slaves.
 569  */
 570 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 571 {
 572         struct bonding *bond = to_bond(d);
 573
 574         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
 575 }
 576
 577 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 578 {
 579         int new_value;
 580         int ret = count;
 581         struct bonding *bond = to_bond(d);
 582
 583         if (bond->slave_cnt != 0) {
 584                 printk(KERN_ERR DRV_NAME
 585                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 586                        bond->dev->name);
 587                 ret = -EPERM;
 588                 goto out;
 589         }
 590
 591         if (sscanf(buf, "%d", &new_value) != 1) {
 592                 printk(KERN_ERR DRV_NAME
 593                        ": %s: no fail_over_mac value specified.\n",
 594                        bond->dev->name);
 595                 ret = -EINVAL;
 596                 goto out;
 597         }
 598
 599         if ((new_value == 0) || (new_value == 1)) {
 600                 bond->params.fail_over_mac = new_value;
 601                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
 602                        bond->dev->name, new_value);
 603         } else {
 604                 printk(KERN_INFO DRV_NAME
 605                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
 606                        bond->dev->name, new_value);
 607         }
 608 out:
 609         return ret;
 610 }
 611
 612 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 613
 614 /*
 615  * Show and set the arp timer interval.  There are two tricky bits
 616  * here.  First, if ARP monitoring is activated, then we must disable
 617  * MII monitoring.  Second, if the ARP timer isn't running, we must
 618  * start it.
 619  */
 620 static ssize_t bonding_show_arp_interval(struct device *d,
 621                                          struct device_attribute *attr,
 622                                          char *buf)
 623 {
 624         struct bonding *bond = to_bond(d);
 625
 626         return sprintf(buf, "%d\n", bond->params.arp_interval);
 627 }
 628
 629 static ssize_t bonding_store_arp_interval(struct device *d,
 630                                           struct device_attribute *attr,
 631                                           const char *buf, size_t count)
 632 {
 633         int new_value, ret = count;
 634         struct bonding *bond = to_bond(d);
 635
 636         if (sscanf(buf, "%d", &new_value) != 1) {
 637                 printk(KERN_ERR DRV_NAME
 638                        ": %s: no arp_interval value specified.\n",
 639                        bond->dev->name);
 640                 ret = -EINVAL;
 641                 goto out;
 642         }
 643         if (new_value < 0) {
 644                 printk(KERN_ERR DRV_NAME
 645                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 646                        bond->dev->name, new_value, INT_MAX);
 647                 ret = -EINVAL;
 648                 goto out;
 649         }
 650
 651         printk(KERN_INFO DRV_NAME
 652                ": %s: Setting ARP monitoring interval to %d.\n",
 653                bond->dev->name, new_value);
 654         bond->params.arp_interval = new_value;
 655         if (bond->params.miimon) {
 656                 printk(KERN_INFO DRV_NAME
 657                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 658                        "%s Disabling MII monitoring.\n",
 659                        bond->dev->name, bond->dev->name);
 660                 bond->params.miimon = 0;
 661                 if (delayed_work_pending(&bond->mii_work)) {
 662                         cancel_delayed_work(&bond->mii_work);
 663                         flush_workqueue(bond->wq);
 664                 }
 665         }
 666         if (!bond->params.arp_targets[0]) {
 667                 printk(KERN_INFO DRV_NAME
 668                        ": %s: ARP monitoring has been set up, "
 669                        "but no ARP targets have been specified.\n",
 670                        bond->dev->name);
 671         }
 672         if (bond->dev->flags & IFF_UP) {
 673                 /* If the interface is up, we may need to fire off
 674                  * the ARP timer.  If the interface is down, the
 675                  * timer will get fired off when the open function
 676                  * is called.
 677                  */
 678                 if (!delayed_work_pending(&bond->arp_work)) {
 679                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 680                                 INIT_DELAYED_WORK(&bond->arp_work,
 681                                                   bond_activebackup_arp_mon);
 682                         else
 683                                 INIT_DELAYED_WORK(&bond->arp_work,
 684                                                   bond_loadbalance_arp_mon);
 685
 686                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 687                 }
 688         }
 689
 690 out:
 691         return ret;
 692 }
 693 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 694
 695 /*
 696  * Show and set the arp targets.
 697  */
 698 static ssize_t bonding_show_arp_targets(struct device *d,
 699                                         struct device_attribute *attr,
 700                                         char *buf)
 701 {
 702         int i, res = 0;
 703         struct bonding *bond = to_bond(d);
 704
 705         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 706                 if (bond->params.arp_targets[i])
 707                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 708                                NIPQUAD(bond->params.arp_targets[i]));
 709         }
 710         if (res)
 711                 buf[res-1] = '\n'; /* eat the leftover space */
 712         return res;
 713 }
 714
 715 static ssize_t bonding_store_arp_targets(struct device *d,
 716                                          struct device_attribute *attr,
 717                                          const char *buf, size_t count)
 718 {
 719         __be32 newtarget;
 720         int i = 0, done = 0, ret = count;
 721         struct bonding *bond = to_bond(d);
 722         __be32 *targets;
 723
 724         targets = bond->params.arp_targets;
 725         newtarget = in_aton(buf + 1);
 726         /* look for adds */
 727         if (buf[0] == '+') {
 728                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 729                         printk(KERN_ERR DRV_NAME
 730                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 731                                bond->dev->name, NIPQUAD(newtarget));
 732                         ret = -EINVAL;
 733                         goto out;
 734                 }
 735                 /* look for an empty slot to put the target in, and check for dupes */
 736                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 737                         if (targets[i] == newtarget) { /* duplicate */
 738                                 printk(KERN_ERR DRV_NAME
 739                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 740                                        bond->dev->name, NIPQUAD(newtarget));
 741                                 if (done)
 742                                         targets[i] = 0;
 743                                 ret = -EINVAL;
 744                                 goto out;
 745                         }
 746                         if (targets[i] == 0 && !done) {
 747                                 printk(KERN_INFO DRV_NAME
 748                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 749                                        bond->dev->name, NIPQUAD(newtarget));
 750                                 done = 1;
 751                                 targets[i] = newtarget;
 752                         }
 753                 }
 754                 if (!done) {
 755                         printk(KERN_ERR DRV_NAME
 756                                ": %s: ARP target table is full!\n",
 757                                bond->dev->name);
 758                         ret = -EINVAL;
 759                         goto out;
 760                 }
 761
 762         }
 763         else if (buf[0] == '-') {
 764                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 765                         printk(KERN_ERR DRV_NAME
 766                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 767                                bond->dev->name, NIPQUAD(newtarget));
 768                         ret = -EINVAL;
 769                         goto out;
 770                 }
 771
 772                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 773                         if (targets[i] == newtarget) {
 774                                 printk(KERN_INFO DRV_NAME
 775                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 776                                        bond->dev->name, NIPQUAD(newtarget));
 777                                 targets[i] = 0;
 778                                 done = 1;
 779                         }
 780                 }
 781                 if (!done) {
 782                         printk(KERN_INFO DRV_NAME
 783                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 784                                bond->dev->name, NIPQUAD(newtarget));
 785                         ret = -EINVAL;
 786                         goto out;
 787                 }
 788         }
 789         else {
 790                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 791                         bond->dev->name);
 792                 ret = -EPERM;
 793                 goto out;
 794         }
 795
 796 out:
 797         return ret;
 798 }
 799 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 800
 801 /*
 802  * Show and set the up and down delays.  These must be multiples of the
 803  * MII monitoring value, and are stored internally as the multiplier.
 804  * Thus, we must translate to MS for the real world.
 805  */
 806 static ssize_t bonding_show_downdelay(struct device *d,
 807                                       struct device_attribute *attr,
 808                                       char *buf)
 809 {
 810         struct bonding *bond = to_bond(d);
 811
 812         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 813 }
 814
 815 static ssize_t bonding_store_downdelay(struct device *d,
 816                                        struct device_attribute *attr,
 817                                        const char *buf, size_t count)
 818 {
 819         int new_value, ret = count;
 820         struct bonding *bond = to_bond(d);
 821
 822         if (!(bond->params.miimon)) {
 823                 printk(KERN_ERR DRV_NAME
 824                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 825                        bond->dev->name);
 826                 ret = -EPERM;
 827                 goto out;
 828         }
 829
 830         if (sscanf(buf, "%d", &new_value) != 1) {
 831                 printk(KERN_ERR DRV_NAME
 832                        ": %s: no down delay value specified.\n",
 833                        bond->dev->name);
 834                 ret = -EINVAL;
 835                 goto out;
 836         }
 837         if (new_value < 0) {
 838                 printk(KERN_ERR DRV_NAME
 839                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 840                        bond->dev->name, new_value, 1, INT_MAX);
 841                 ret = -EINVAL;
 842                 goto out;
 843         } else {
 844                 if ((new_value % bond->params.miimon) != 0) {
 845                         printk(KERN_WARNING DRV_NAME
 846                                ": %s: Warning: down delay (%d) is not a multiple "
 847                                "of miimon (%d), delay rounded to %d ms\n",
 848                                bond->dev->name, new_value, bond->params.miimon,
 849                                (new_value / bond->params.miimon) *
 850                                bond->params.miimon);
 851                 }
 852                 bond->params.downdelay = new_value / bond->params.miimon;
 853                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 854                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 855
 856         }
 857
 858 out:
 859         return ret;
 860 }
 861 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 862
 863 static ssize_t bonding_show_updelay(struct device *d,
 864                                     struct device_attribute *attr,
 865                                     char *buf)
 866 {
 867         struct bonding *bond = to_bond(d);
 868
 869         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 870
 871 }
 872
 873 static ssize_t bonding_store_updelay(struct device *d,
 874                                      struct device_attribute *attr,
 875                                      const char *buf, size_t count)
 876 {
 877         int new_value, ret = count;
 878         struct bonding *bond = to_bond(d);
 879
 880         if (!(bond->params.miimon)) {
 881                 printk(KERN_ERR DRV_NAME
 882                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 883                        bond->dev->name);
 884                 ret = -EPERM;
 885                 goto out;
 886         }
 887
 888         if (sscanf(buf, "%d", &new_value) != 1) {
 889                 printk(KERN_ERR DRV_NAME
 890                        ": %s: no up delay value specified.\n",
 891                        bond->dev->name);
 892                 ret = -EINVAL;
 893                 goto out;
 894         }
 895         if (new_value < 0) {
 896                 printk(KERN_ERR DRV_NAME
 897                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 898                        bond->dev->name, new_value, 1, INT_MAX);
 899                 ret = -EINVAL;
 900                 goto out;
 901         } else {
 902                 if ((new_value % bond->params.miimon) != 0) {
 903                         printk(KERN_WARNING DRV_NAME
 904                                ": %s: Warning: up delay (%d) is not a multiple "
 905                                "of miimon (%d), updelay rounded to %d ms\n",
 906                                bond->dev->name, new_value, bond->params.miimon,
 907                                (new_value / bond->params.miimon) *
 908                                bond->params.miimon);
 909                 }
 910                 bond->params.updelay = new_value / bond->params.miimon;
 911                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 912                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 913
 914         }
 915
 916 out:
 917         return ret;
 918 }
 919 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 920
 921 /*
 922  * Show and set the LACP interval.  Interface must be down, and the mode
 923  * must be set to 802.3ad mode.
 924  */
 925 static ssize_t bonding_show_lacp(struct device *d,
 926                                  struct device_attribute *attr,
 927                                  char *buf)
 928 {
 929         struct bonding *bond = to_bond(d);
 930
 931         return sprintf(buf, "%s %d\n",
 932                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 933                 bond->params.lacp_fast);
 934 }
 935
 936 static ssize_t bonding_store_lacp(struct device *d,
 937                                   struct device_attribute *attr,
 938                                   const char *buf, size_t count)
 939 {
 940         int new_value, ret = count;
 941         struct bonding *bond = to_bond(d);
 942
 943         if (bond->dev->flags & IFF_UP) {
 944                 printk(KERN_ERR DRV_NAME
 945                        ": %s: Unable to update LACP rate because interface is up.\n",
 946                        bond->dev->name);
 947                 ret = -EPERM;
 948                 goto out;
 949         }
 950
 951         if (bond->params.mode != BOND_MODE_8023AD) {
 952                 printk(KERN_ERR DRV_NAME
 953                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 954                        bond->dev->name);
 955                 ret = -EPERM;
 956                 goto out;
 957         }
 958
 959         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 960
 961         if ((new_value == 1) || (new_value == 0)) {
 962                 bond->params.lacp_fast = new_value;
 963                 printk(KERN_INFO DRV_NAME
 964                        ": %s: Setting LACP rate to %s (%d).\n",
 965                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 966         } else {
 967                 printk(KERN_ERR DRV_NAME
 968                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 969                         bond->dev->name, (int)strlen(buf) - 1, buf);
 970                 ret = -EINVAL;
 971         }
 972 out:
 973         return ret;
 974 }
 975 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 976
 977 /*
 978  * Show and set the MII monitor interval.  There are two tricky bits
 979  * here.  First, if MII monitoring is activated, then we must disable
 980  * ARP monitoring.  Second, if the timer isn't running, we must
 981  * start it.
 982  */
 983 static ssize_t bonding_show_miimon(struct device *d,
 984                                    struct device_attribute *attr,
 985                                    char *buf)
 986 {
 987         struct bonding *bond = to_bond(d);
 988
 989         return sprintf(buf, "%d\n", bond->params.miimon);
 990 }
 991
 992 static ssize_t bonding_store_miimon(struct device *d,
 993                                     struct device_attribute *attr,
 994                                     const char *buf, size_t count)
 995 {
 996         int new_value, ret = count;
 997         struct bonding *bond = to_bond(d);
 998
 999         if (sscanf(buf, "%d", &new_value) != 1) {
1000                 printk(KERN_ERR DRV_NAME
1001                        ": %s: no miimon value specified.\n",
1002                        bond->dev->name);
1003                 ret = -EINVAL;
1004                 goto out;
1005         }
1006         if (new_value < 0) {
1007                 printk(KERN_ERR DRV_NAME
1008                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1009                        bond->dev->name, new_value, 1, INT_MAX);
1010                 ret = -EINVAL;
1011                 goto out;
1012         } else {
1013                 printk(KERN_INFO DRV_NAME
1014                        ": %s: Setting MII monitoring interval to %d.\n",
1015                        bond->dev->name, new_value);
1016                 bond->params.miimon = new_value;
1017                 if(bond->params.updelay)
1018                         printk(KERN_INFO DRV_NAME
1019                               ": %s: Note: Updating updelay (to %d) "
1020                               "since it is a multiple of the miimon value.\n",
1021                               bond->dev->name,
1022                               bond->params.updelay * bond->params.miimon);
1023                 if(bond->params.downdelay)
1024                         printk(KERN_INFO DRV_NAME
1025                               ": %s: Note: Updating downdelay (to %d) "
1026                               "since it is a multiple of the miimon value.\n",
1027                               bond->dev->name,
1028                               bond->params.downdelay * bond->params.miimon);
1029                 if (bond->params.arp_interval) {
1030                         printk(KERN_INFO DRV_NAME
1031                                ": %s: MII monitoring cannot be used with "
1032                                "ARP monitoring. Disabling ARP monitoring...\n",
1033                                bond->dev->name);
1034                         bond->params.arp_interval = 0;
1035                         if (bond->params.arp_validate) {
1036                                 bond_unregister_arp(bond);
1037                                 bond->params.arp_validate =
1038                                         BOND_ARP_VALIDATE_NONE;
1039                         }
1040                         if (delayed_work_pending(&bond->arp_work)) {
1041                                 cancel_delayed_work(&bond->arp_work);
1042                                 flush_workqueue(bond->wq);
1043                         }
1044                 }
1045
1046                 if (bond->dev->flags & IFF_UP) {
1047                         /* If the interface is up, we may need to fire off
1048                          * the MII timer. If the interface is down, the
1049                          * timer will get fired off when the open function
1050                          * is called.
1051                          */
1052                         if (!delayed_work_pending(&bond->mii_work)) {
1053                                 INIT_DELAYED_WORK(&bond->mii_work,
1054                                                   bond_mii_monitor);
1055                                 queue_delayed_work(bond->wq,
1056                                                    &bond->mii_work, 0);
1057                         }
1058                 }
1059         }
1060 out:
1061         return ret;
1062 }
1063 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1064
1065 /*
1066  * Show and set the primary slave.  The store function is much
1067  * simpler than bonding_store_slaves function because it only needs to
1068  * handle one interface name.
1069  * The bond must be a mode that supports a primary for this be
1070  * set.
1071  */
1072 static ssize_t bonding_show_primary(struct device *d,
1073                                     struct device_attribute *attr,
1074                                     char *buf)
1075 {
1076         int count = 0;
1077         struct bonding *bond = to_bond(d);
1078
1079         if (bond->primary_slave)
1080                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1081
1082         return count;
1083 }
1084
1085 static ssize_t bonding_store_primary(struct device *d,
1086                                      struct device_attribute *attr,
1087                                      const char *buf, size_t count)
1088 {
1089         int i;
1090         struct slave *slave;
1091         struct bonding *bond = to_bond(d);
1092
1093         write_lock_bh(&bond->lock);
1094         if (!USES_PRIMARY(bond->params.mode)) {
1095                 printk(KERN_INFO DRV_NAME
1096                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1097                        bond->dev->name, bond->dev->name, bond->params.mode);
1098         } else {
1099                 bond_for_each_slave(bond, slave, i) {
1100                         if (strnicmp
1101                             (slave->dev->name, buf,
1102                              strlen(slave->dev->name)) == 0) {
1103                                 printk(KERN_INFO DRV_NAME
1104                                        ": %s: Setting %s as primary slave.\n",
1105                                        bond->dev->name, slave->dev->name);
1106                                 bond->primary_slave = slave;
1107                                 bond_select_active_slave(bond);
1108                                 goto out;
1109                         }
1110                 }
1111
1112                 /* if we got here, then we didn't match the name of any slave */
1113
1114                 if (strlen(buf) == 0 || buf[0] == '\n') {
1115                         printk(KERN_INFO DRV_NAME
1116                                ": %s: Setting primary slave to None.\n",
1117                                bond->dev->name);
1118                         bond->primary_slave = NULL;
1119                                 bond_select_active_slave(bond);
1120                 } else {
1121                         printk(KERN_INFO DRV_NAME
1122                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1123                                bond->dev->name, (int)strlen(buf) - 1, buf);
1124                 }
1125         }
1126 out:
1127         write_unlock_bh(&bond->lock);
1128
1129         rtnl_unlock();
1130
1131         return count;
1132 }
1133 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1134
1135 /*
1136  * Show and set the use_carrier flag.
1137  */
1138 static ssize_t bonding_show_carrier(struct device *d,
1139                                     struct device_attribute *attr,
1140                                     char *buf)
1141 {
1142         struct bonding *bond = to_bond(d);
1143
1144         return sprintf(buf, "%d\n", bond->params.use_carrier);
1145 }
1146
1147 static ssize_t bonding_store_carrier(struct device *d,
1148                                      struct device_attribute *attr,
1149                                      const char *buf, size_t count)
1150 {
1151         int new_value, ret = count;
1152         struct bonding *bond = to_bond(d);
1153
1154
1155         if (sscanf(buf, "%d", &new_value) != 1) {
1156                 printk(KERN_ERR DRV_NAME
1157                        ": %s: no use_carrier value specified.\n",
1158                        bond->dev->name);
1159                 ret = -EINVAL;
1160                 goto out;
1161         }
1162         if ((new_value == 0) || (new_value == 1)) {
1163                 bond->params.use_carrier = new_value;
1164                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1165                        bond->dev->name, new_value);
1166         } else {
1167                 printk(KERN_INFO DRV_NAME
1168                        ": %s: Ignoring invalid use_carrier value %d.\n",
1169                        bond->dev->name, new_value);
1170         }
1171 out:
1172         return count;
1173 }
1174 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1175
1176
1177 /*
1178  * Show and set currently active_slave.
1179  */
1180 static ssize_t bonding_show_active_slave(struct device *d,
1181                                          struct device_attribute *attr,
1182                                          char *buf)
1183 {
1184         struct slave *curr;
1185         struct bonding *bond = to_bond(d);
1186         int count = 0;
1187
1188         read_lock(&bond->curr_slave_lock);
1189         curr = bond->curr_active_slave;
1190         read_unlock(&bond->curr_slave_lock);
1191
1192         if (USES_PRIMARY(bond->params.mode) && curr)
1193                 count = sprintf(buf, "%s\n", curr->dev->name);
1194         return count;
1195 }
1196
1197 static ssize_t bonding_store_active_slave(struct device *d,
1198                                           struct device_attribute *attr,
1199                                           const char *buf, size_t count)
1200 {
1201         int i;
1202         struct slave *slave;
1203         struct slave *old_active = NULL;
1204         struct slave *new_active = NULL;
1205         struct bonding *bond = to_bond(d);
1206
1207         rtnl_lock();
1208         write_lock_bh(&bond->lock);
1209
1210         if (!USES_PRIMARY(bond->params.mode)) {
1211                 printk(KERN_INFO DRV_NAME
1212                        ": %s: Unable to change active slave; %s is in mode %d\n",
1213                        bond->dev->name, bond->dev->name, bond->params.mode);
1214         } else {
1215                 bond_for_each_slave(bond, slave, i) {
1216                         if (strnicmp
1217                             (slave->dev->name, buf,
1218                              strlen(slave->dev->name)) == 0) {
1219                                 old_active = bond->curr_active_slave;
1220                                 new_active = slave;
1221                                 if (new_active == old_active) {
1222                                         /* do nothing */
1223                                         printk(KERN_INFO DRV_NAME
1224                                                ": %s: %s is already the current active slave.\n",
1225                                                bond->dev->name, slave->dev->name);
1226                                         goto out;
1227                                 }
1228                                 else {
1229                                         if ((new_active) &&
1230                                             (old_active) &&
1231                                             (new_active->link == BOND_LINK_UP) &&
1232                                             IS_UP(new_active->dev)) {
1233                                                 printk(KERN_INFO DRV_NAME
1234                                                       ": %s: Setting %s as active slave.\n",
1235                                                       bond->dev->name, slave->dev->name);
1236                                                 bond_change_active_slave(bond, new_active);
1237                                         }
1238                                         else {
1239                                                 printk(KERN_INFO DRV_NAME
1240                                                       ": %s: Could not set %s as active slave; "
1241                                                       "either %s is down or the link is down.\n",
1242                                                       bond->dev->name, slave->dev->name,
1243                                                       slave->dev->name);
1244                                         }
1245                                         goto out;
1246                                 }
1247                         }
1248                 }
1249
1250                 /* if we got here, then we didn't match the name of any slave */
1251
1252                 if (strlen(buf) == 0 || buf[0] == '\n') {
1253                         printk(KERN_INFO DRV_NAME
1254                                ": %s: Setting active slave to None.\n",
1255                                bond->dev->name);
1256                         bond->primary_slave = NULL;
1257                                 bond_select_active_slave(bond);
1258                 } else {
1259                         printk(KERN_INFO DRV_NAME
1260                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1261                                bond->dev->name, (int)strlen(buf) - 1, buf);
1262                 }
1263         }
1264 out:
1265         write_unlock_bh(&bond->lock);
1266         rtnl_unlock();
1267
1268         return count;
1269
1270 }
1271 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1272
1273
1274 /*
1275  * Show link status of the bond interface.
1276  */
1277 static ssize_t bonding_show_mii_status(struct device *d,
1278                                        struct device_attribute *attr,
1279                                        char *buf)
1280 {
1281         struct slave *curr;
1282         struct bonding *bond = to_bond(d);
1283
1284         read_lock(&bond->curr_slave_lock);
1285         curr = bond->curr_active_slave;
1286         read_unlock(&bond->curr_slave_lock);
1287
1288         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1289 }
1290 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1291
1292
1293 /*
1294  * Show current 802.3ad aggregator ID.
1295  */
1296 static ssize_t bonding_show_ad_aggregator(struct device *d,
1297                                           struct device_attribute *attr,
1298                                           char *buf)
1299 {
1300         int count = 0;
1301         struct bonding *bond = to_bond(d);
1302
1303         if (bond->params.mode == BOND_MODE_8023AD) {
1304                 struct ad_info ad_info;
1305                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1306         }
1307
1308         return count;
1309 }
1310 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1311
1312
1313 /*
1314  * Show number of active 802.3ad ports.
1315  */
1316 static ssize_t bonding_show_ad_num_ports(struct device *d,
1317                                          struct device_attribute *attr,
1318                                          char *buf)
1319 {
1320         int count = 0;
1321         struct bonding *bond = to_bond(d);
1322
1323         if (bond->params.mode == BOND_MODE_8023AD) {
1324                 struct ad_info ad_info;
1325                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1326         }
1327
1328         return count;
1329 }
1330 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1331
1332
1333 /*
1334  * Show current 802.3ad actor key.
1335  */
1336 static ssize_t bonding_show_ad_actor_key(struct device *d,
1337                                          struct device_attribute *attr,
1338                                          char *buf)
1339 {
1340         int count = 0;
1341         struct bonding *bond = to_bond(d);
1342
1343         if (bond->params.mode == BOND_MODE_8023AD) {
1344                 struct ad_info ad_info;
1345                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1346         }
1347
1348         return count;
1349 }
1350 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1351
1352
1353 /*
1354  * Show current 802.3ad partner key.
1355  */
1356 static ssize_t bonding_show_ad_partner_key(struct device *d,
1357                                            struct device_attribute *attr,
1358                                            char *buf)
1359 {
1360         int count = 0;
1361         struct bonding *bond = to_bond(d);
1362
1363         if (bond->params.mode == BOND_MODE_8023AD) {
1364                 struct ad_info ad_info;
1365                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1366         }
1367
1368         return count;
1369 }
1370 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1371
1372
1373 /*
1374  * Show current 802.3ad partner mac.
1375  */
1376 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1377                                            struct device_attribute *attr,
1378                                            char *buf)
1379 {
1380         int count = 0;
1381         struct bonding *bond = to_bond(d);
1382         DECLARE_MAC_BUF(mac);
1383
1384         if (bond->params.mode == BOND_MODE_8023AD) {
1385                 struct ad_info ad_info;
1386                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1387                         count = sprintf(buf,"%s\n",
1388                                         print_mac(mac, ad_info.partner_system));
1389                 }
1390         }
1391
1392         return count;
1393 }
1394 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1395
1396
1397
1398 static struct attribute *per_bond_attrs[] = {
1399         &dev_attr_slaves.attr,
1400         &dev_attr_mode.attr,
1401         &dev_attr_fail_over_mac.attr,
1402         &dev_attr_arp_validate.attr,
1403         &dev_attr_arp_interval.attr,
1404         &dev_attr_arp_ip_target.attr,
1405         &dev_attr_downdelay.attr,
1406         &dev_attr_updelay.attr,
1407         &dev_attr_lacp_rate.attr,
1408         &dev_attr_xmit_hash_policy.attr,
1409         &dev_attr_miimon.attr,
1410         &dev_attr_primary.attr,
1411         &dev_attr_use_carrier.attr,
1412         &dev_attr_active_slave.attr,
1413         &dev_attr_mii_status.attr,
1414         &dev_attr_ad_aggregator.attr,
1415         &dev_attr_ad_num_ports.attr,
1416         &dev_attr_ad_actor_key.attr,
1417         &dev_attr_ad_partner_key.attr,
1418         &dev_attr_ad_partner_mac.attr,
1419         NULL,
1420 };
1421
1422 static struct attribute_group bonding_group = {
1423         .name = "bonding",
1424         .attrs = per_bond_attrs,
1425 };
1426
1427 /*
1428  * Initialize sysfs.  This sets up the bonding_masters file in
1429  * /sys/class/net.
1430  */
1431 int bond_create_sysfs(void)
1432 {
1433         int ret = 0;
1434         struct bonding *firstbond;
1435
1436         init_rwsem(&bonding_rwsem);
1437
1438         /* get the netdev class pointer */
1439         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1440         if (!firstbond)
1441                 return -ENODEV;
1442
1443         netdev_class = firstbond->dev->dev.class;
1444         if (!netdev_class)
1445                 return -ENODEV;
1446
1447         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1448         /*
1449          * Permit multiple loads of the module by ignoring failures to
1450          * create the bonding_masters sysfs file.  Bonding devices
1451          * created by second or subsequent loads of the module will
1452          * not be listed in, or controllable by, bonding_masters, but
1453          * will have the usual "bonding" sysfs directory.
1454          *
1455          * This is done to preserve backwards compatibility for
1456          * initscripts/sysconfig, which load bonding multiple times to
1457          * configure multiple bonding devices.
1458          */
1459         if (ret == -EEXIST) {
1460                 netdev_class = NULL;
1461                 return 0;
1462         }
1463
1464         return ret;
1465
1466 }
1467
1468 /*
1469  * Remove /sys/class/net/bonding_masters.
1470  */
1471 void bond_destroy_sysfs(void)
1472 {
1473         if (netdev_class)
1474                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1475 }
1476
1477 /*
1478  * Initialize sysfs for each bond.  This sets up and registers
1479  * the 'bondctl' directory for each individual bond under /sys/class/net.
1480  */
1481 int bond_create_sysfs_entry(struct bonding *bond)
1482 {
1483         struct net_device *dev = bond->dev;
1484         int err;
1485
1486         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1487         if (err) {
1488                 printk(KERN_EMERG "eek! didn't create group!\n");
1489         }
1490
1491         if (expected_refcount < 1)
1492                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1493
1494         return err;
1495 }
1496 /*
1497  * Remove sysfs entries for each bond.
1498  */
1499 void bond_destroy_sysfs_entry(struct bonding *bond)
1500 {
1501         struct net_device *dev = bond->dev;
1502
1503         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1504 }
1505