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 extern struct bond_parm_tbl fail_over_mac_tbl[];
  54
  55 static int expected_refcount = -1;
  56 static struct class *netdev_class;
  57 /*--------------------------- Data Structures -----------------------------*/
  58
  59 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
  60  * Because kobject_register tries to acquire the subsystem lock.  If
  61  * we already hold the lock (which we would if the user was creating
  62  * a new bond through the sysfs interface), we deadlock.
  63  * This lock is only needed when deleting a bond - we need to make sure
  64  * that we don't collide with an ongoing ioctl.
  65  */
  66
  67 struct rw_semaphore bonding_rwsem;
  68
  69
  70
  71
  72 /*------------------------------ Functions --------------------------------*/
  73
  74 /*
  75  * "show" function for the bond_masters attribute.
  76  * The class parameter is ignored.
  77  */
  78 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
  79 {
  80         int res = 0;
  81         struct bonding *bond;
  82
  83         down_read(&(bonding_rwsem));
  84
  85         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  86                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  87                         /* not enough space for another interface name */
  88                         if ((PAGE_SIZE - res) > 10)
  89                                 res = PAGE_SIZE - 10;
  90                         res += sprintf(buf + res, "++more++ ");
  91                         break;
  92                 }
  93                 res += sprintf(buf + res, "%s ", bond->dev->name);
  94         }
  95         if (res)
  96                 buf[res-1] = '\n'; /* eat the leftover space */
  97         up_read(&(bonding_rwsem));
  98         return res;
  99 }
 100
 101 /*
 102  * "store" function for the bond_masters attribute.  This is what
 103  * creates and deletes entire bonds.
 104  *
 105  * The class parameter is ignored.
 106  *
 107  */
 108
 109 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 110 {
 111         char command[IFNAMSIZ + 1] = {0, };
 112         char *ifname;
 113         int rv, res = count;
 114         struct bonding *bond;
 115
 116         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 117         ifname = command + 1;
 118         if ((strlen(command) <= 1) ||
 119             !dev_valid_name(ifname))
 120                 goto err_no_cmd;
 121
 122         if (command[0] == '+') {
 123                 printk(KERN_INFO DRV_NAME
 124                         ": %s is being created...\n", ifname);
 125                 rv = bond_create(ifname, &bonding_defaults);
 126                 if (rv) {
 127                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
 128                         res = rv;
 129                 }
 130                 goto out;
 131         }
 132
 133         if (command[0] == '-') {
 134                 rtnl_lock();
 135                 down_write(&bonding_rwsem);
 136
 137                 list_for_each_entry(bond, &bond_dev_list, bond_list)
 138                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 139                                 /* check the ref count on the bond's kobject.
 140                                  * If it's > expected, then there's a file open,
 141                                  * and we have to fail.
 142                                  */
 143                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 144                                                         > expected_refcount){
 145                                         printk(KERN_INFO DRV_NAME
 146                                                 ": Unable remove bond %s due to open references.\n",
 147                                                 ifname);
 148                                         res = -EPERM;
 149                                         goto out_unlock;
 150                                 }
 151                                 printk(KERN_INFO DRV_NAME
 152                                         ": %s is being deleted...\n",
 153                                         bond->dev->name);
 154                                 bond_destroy(bond);
 155                                 goto out_unlock;
 156                         }
 157
 158                 printk(KERN_ERR DRV_NAME
 159                         ": unable to delete non-existent bond %s\n", ifname);
 160                 res = -ENODEV;
 161                 goto out_unlock;
 162         }
 163
 164 err_no_cmd:
 165         printk(KERN_ERR DRV_NAME
 166                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 167         return -EPERM;
 168
 169 out_unlock:
 170         up_write(&bonding_rwsem);
 171         rtnl_unlock();
 172
 173         /* Always return either count or an error.  If you return 0, you'll
 174          * get called forever, which is bad.
 175          */
 176 out:
 177         return res;
 178 }
 179 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 180 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 181                   bonding_show_bonds, bonding_store_bonds);
 182
 183 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 184 {
 185         char linkname[IFNAMSIZ+7];
 186         int ret = 0;
 187
 188         /* first, create a link from the slave back to the master */
 189         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 190                                 "master");
 191         if (ret)
 192                 return ret;
 193         /* next, create a link from the master to the slave */
 194         sprintf(linkname,"slave_%s",slave->name);
 195         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 196                                 linkname);
 197         return ret;
 198
 199 }
 200
 201 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 202 {
 203         char linkname[IFNAMSIZ+7];
 204
 205         sysfs_remove_link(&(slave->dev.kobj), "master");
 206         sprintf(linkname,"slave_%s",slave->name);
 207         sysfs_remove_link(&(master->dev.kobj), linkname);
 208 }
 209
 210
 211 /*
 212  * Show the slaves in the current bond.
 213  */
 214 static ssize_t bonding_show_slaves(struct device *d,
 215                                    struct device_attribute *attr, char *buf)
 216 {
 217         struct slave *slave;
 218         int i, res = 0;
 219         struct bonding *bond = to_bond(d);
 220
 221         read_lock(&bond->lock);
 222         bond_for_each_slave(bond, slave, i) {
 223                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 224                         /* not enough space for another interface name */
 225                         if ((PAGE_SIZE - res) > 10)
 226                                 res = PAGE_SIZE - 10;
 227                         res += sprintf(buf + res, "++more++ ");
 228                         break;
 229                 }
 230                 res += sprintf(buf + res, "%s ", slave->dev->name);
 231         }
 232         read_unlock(&bond->lock);
 233         if (res)
 234                 buf[res-1] = '\n'; /* eat the leftover space */
 235         return res;
 236 }
 237
 238 /*
 239  * Set the slaves in the current bond.  The bond interface must be
 240  * up for this to succeed.
 241  * This function is largely the same flow as bonding_update_bonds().
 242  */
 243 static ssize_t bonding_store_slaves(struct device *d,
 244                                     struct device_attribute *attr,
 245                                     const char *buffer, size_t count)
 246 {
 247         char command[IFNAMSIZ + 1] = { 0, };
 248         char *ifname;
 249         int i, res, found, ret = count;
 250         u32 original_mtu;
 251         struct slave *slave;
 252         struct net_device *dev = NULL;
 253         struct bonding *bond = to_bond(d);
 254
 255         /* Quick sanity check -- is the bond interface up? */
 256         if (!(bond->dev->flags & IFF_UP)) {
 257                 printk(KERN_WARNING DRV_NAME
 258                        ": %s: doing slave updates when interface is down.\n",
 259                        bond->dev->name);
 260         }
 261
 262         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 263
 264         rtnl_lock();
 265         down_write(&(bonding_rwsem));
 266
 267         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 268         ifname = command + 1;
 269         if ((strlen(command) <= 1) ||
 270             !dev_valid_name(ifname))
 271                 goto err_no_cmd;
 272
 273         if (command[0] == '+') {
 274
 275                 /* Got a slave name in ifname.  Is it already in the list? */
 276                 found = 0;
 277                 read_lock(&bond->lock);
 278                 bond_for_each_slave(bond, slave, i)
 279                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 280                                 printk(KERN_ERR DRV_NAME
 281                                        ": %s: Interface %s is already enslaved!\n",
 282                                        bond->dev->name, ifname);
 283                                 ret = -EPERM;
 284                                 read_unlock(&bond->lock);
 285                                 goto out;
 286                         }
 287
 288                 read_unlock(&bond->lock);
 289                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 290                        bond->dev->name, ifname);
 291                 dev = dev_get_by_name(&init_net, ifname);
 292                 if (!dev) {
 293                         printk(KERN_INFO DRV_NAME
 294                                ": %s: Interface %s does not exist!\n",
 295                                bond->dev->name, ifname);
 296                         ret = -EPERM;
 297                         goto out;
 298                 }
 299                 else
 300                         dev_put(dev);
 301
 302                 if (dev->flags & IFF_UP) {
 303                         printk(KERN_ERR DRV_NAME
 304                                ": %s: Error: Unable to enslave %s "
 305                                "because it is already up.\n",
 306                                bond->dev->name, dev->name);
 307                         ret = -EPERM;
 308                         goto out;
 309                 }
 310                 /* If this is the first slave, then we need to set
 311                    the master's hardware address to be the same as the
 312                    slave's. */
 313                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 314                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 315                                dev->addr_len);
 316                 }
 317
 318                 /* Set the slave's MTU to match the bond */
 319                 original_mtu = dev->mtu;
 320                 if (dev->mtu != bond->dev->mtu) {
 321                         if (dev->change_mtu) {
 322                                 res = dev->change_mtu(dev,
 323                                                       bond->dev->mtu);
 324                                 if (res) {
 325                                         ret = res;
 326                                         goto out;
 327                                 }
 328                         } else {
 329                                 dev->mtu = bond->dev->mtu;
 330                         }
 331                 }
 332                 res = bond_enslave(bond->dev, dev);
 333                 bond_for_each_slave(bond, slave, i)
 334                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 335                                 slave->original_mtu = original_mtu;
 336                 if (res) {
 337                         ret = res;
 338                 }
 339                 goto out;
 340         }
 341
 342         if (command[0] == '-') {
 343                 dev = NULL;
 344                 original_mtu = 0;
 345                 bond_for_each_slave(bond, slave, i)
 346                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 347                                 dev = slave->dev;
 348                                 original_mtu = slave->original_mtu;
 349                                 break;
 350                         }
 351                 if (dev) {
 352                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 353                                 bond->dev->name, dev->name);
 354                         if (bond->setup_by_slave)
 355                                 res = bond_release_and_destroy(bond->dev, dev);
 356                         else
 357                                 res = bond_release(bond->dev, dev);
 358                         if (res) {
 359                                 ret = res;
 360                                 goto out;
 361                         }
 362                         /* set the slave MTU to the default */
 363                         if (dev->change_mtu) {
 364                                 dev->change_mtu(dev, original_mtu);
 365                         } else {
 366                                 dev->mtu = original_mtu;
 367                         }
 368                 }
 369                 else {
 370                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 371                                 ifname, bond->dev->name);
 372                         ret = -ENODEV;
 373                 }
 374                 goto out;
 375         }
 376
 377 err_no_cmd:
 378         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 379         ret = -EPERM;
 380
 381 out:
 382         up_write(&(bonding_rwsem));
 383         rtnl_unlock();
 384         return ret;
 385 }
 386
 387 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 388
 389 /*
 390  * Show and set the bonding mode.  The bond interface must be down to
 391  * change the mode.
 392  */
 393 static ssize_t bonding_show_mode(struct device *d,
 394                                  struct device_attribute *attr, char *buf)
 395 {
 396         struct bonding *bond = to_bond(d);
 397
 398         return sprintf(buf, "%s %d\n",
 399                         bond_mode_tbl[bond->params.mode].modename,
 400                         bond->params.mode);
 401 }
 402
 403 static ssize_t bonding_store_mode(struct device *d,
 404                                   struct device_attribute *attr,
 405                                   const char *buf, size_t count)
 406 {
 407         int new_value, ret = count;
 408         struct bonding *bond = to_bond(d);
 409
 410         if (bond->dev->flags & IFF_UP) {
 411                 printk(KERN_ERR DRV_NAME
 412                        ": unable to update mode of %s because interface is up.\n",
 413                        bond->dev->name);
 414                 ret = -EPERM;
 415                 goto out;
 416         }
 417
 418         new_value = bond_parse_parm(buf, bond_mode_tbl);
 419         if (new_value < 0)  {
 420                 printk(KERN_ERR DRV_NAME
 421                        ": %s: Ignoring invalid mode value %.*s.\n",
 422                        bond->dev->name,
 423                        (int)strlen(buf) - 1, buf);
 424                 ret = -EINVAL;
 425                 goto out;
 426         } else {
 427                 if (bond->params.mode == BOND_MODE_8023AD)
 428                         bond_unset_master_3ad_flags(bond);
 429
 430                 if (bond->params.mode == BOND_MODE_ALB)
 431                         bond_unset_master_alb_flags(bond);
 432
 433                 bond->params.mode = new_value;
 434                 bond_set_mode_ops(bond, bond->params.mode);
 435                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 436                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 437         }
 438 out:
 439         return ret;
 440 }
 441 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 442
 443 /*
 444  * Show and set the bonding transmit hash method.  The bond interface must be down to
 445  * change the xmit hash policy.
 446  */
 447 static ssize_t bonding_show_xmit_hash(struct device *d,
 448                                       struct device_attribute *attr,
 449                                       char *buf)
 450 {
 451         struct bonding *bond = to_bond(d);
 452
 453         return sprintf(buf, "%s %d\n",
 454                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 455                        bond->params.xmit_policy);
 456 }
 457
 458 static ssize_t bonding_store_xmit_hash(struct device *d,
 459                                        struct device_attribute *attr,
 460                                        const char *buf, size_t count)
 461 {
 462         int new_value, ret = count;
 463         struct bonding *bond = to_bond(d);
 464
 465         if (bond->dev->flags & IFF_UP) {
 466                 printk(KERN_ERR DRV_NAME
 467                        "%s: Interface is up. Unable to update xmit policy.\n",
 468                        bond->dev->name);
 469                 ret = -EPERM;
 470                 goto out;
 471         }
 472
 473         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 474         if (new_value < 0)  {
 475                 printk(KERN_ERR DRV_NAME
 476                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 477                        bond->dev->name,
 478                        (int)strlen(buf) - 1, buf);
 479                 ret = -EINVAL;
 480                 goto out;
 481         } else {
 482                 bond->params.xmit_policy = new_value;
 483                 bond_set_mode_ops(bond, bond->params.mode);
 484                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 485                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 486         }
 487 out:
 488         return ret;
 489 }
 490 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 491
 492 /*
 493  * Show and set arp_validate.
 494  */
 495 static ssize_t bonding_show_arp_validate(struct device *d,
 496                                          struct device_attribute *attr,
 497                                          char *buf)
 498 {
 499         struct bonding *bond = to_bond(d);
 500
 501         return sprintf(buf, "%s %d\n",
 502                        arp_validate_tbl[bond->params.arp_validate].modename,
 503                        bond->params.arp_validate);
 504 }
 505
 506 static ssize_t bonding_store_arp_validate(struct device *d,
 507                                           struct device_attribute *attr,
 508                                           const char *buf, size_t count)
 509 {
 510         int new_value;
 511         struct bonding *bond = to_bond(d);
 512
 513         new_value = bond_parse_parm(buf, arp_validate_tbl);
 514         if (new_value < 0) {
 515                 printk(KERN_ERR DRV_NAME
 516                        ": %s: Ignoring invalid arp_validate value %s\n",
 517                        bond->dev->name, buf);
 518                 return -EINVAL;
 519         }
 520         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 521                 printk(KERN_ERR DRV_NAME
 522                        ": %s: arp_validate only supported in active-backup mode.\n",
 523                        bond->dev->name);
 524                 return -EINVAL;
 525         }
 526         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 527                bond->dev->name, arp_validate_tbl[new_value].modename,
 528                new_value);
 529
 530         if (!bond->params.arp_validate && new_value) {
 531                 bond_register_arp(bond);
 532         } else if (bond->params.arp_validate && !new_value) {
 533                 bond_unregister_arp(bond);
 534         }
 535
 536         bond->params.arp_validate = new_value;
 537
 538         return count;
 539 }
 540
 541 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 542
 543 /*
 544  * Show and store fail_over_mac.  User only allowed to change the
 545  * value when there are no slaves.
 546  */
 547 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 548 {
 549         struct bonding *bond = to_bond(d);
 550
 551         return sprintf(buf, "%s %d\n",
 552                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
 553                        bond->params.fail_over_mac);
 554 }
 555
 556 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 557 {
 558         int new_value;
 559         struct bonding *bond = to_bond(d);
 560
 561         if (bond->slave_cnt != 0) {
 562                 printk(KERN_ERR DRV_NAME
 563                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 564                        bond->dev->name);
 565                 return -EPERM;
 566         }
 567
 568         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
 569         if (new_value < 0) {
 570                 printk(KERN_ERR DRV_NAME
 571                        ": %s: Ignoring invalid fail_over_mac value %s.\n",
 572                        bond->dev->name, buf);
 573                 return -EINVAL;
 574         }
 575
 576         bond->params.fail_over_mac = new_value;
 577         printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
 578                bond->dev->name, fail_over_mac_tbl[new_value].modename,
 579                new_value);
 580
 581         return count;
 582 }
 583
 584 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 585
 586 /*
 587  * Show and set the arp timer interval.  There are two tricky bits
 588  * here.  First, if ARP monitoring is activated, then we must disable
 589  * MII monitoring.  Second, if the ARP timer isn't running, we must
 590  * start it.
 591  */
 592 static ssize_t bonding_show_arp_interval(struct device *d,
 593                                          struct device_attribute *attr,
 594                                          char *buf)
 595 {
 596         struct bonding *bond = to_bond(d);
 597
 598         return sprintf(buf, "%d\n", bond->params.arp_interval);
 599 }
 600
 601 static ssize_t bonding_store_arp_interval(struct device *d,
 602                                           struct device_attribute *attr,
 603                                           const char *buf, size_t count)
 604 {
 605         int new_value, ret = count;
 606         struct bonding *bond = to_bond(d);
 607
 608         if (sscanf(buf, "%d", &new_value) != 1) {
 609                 printk(KERN_ERR DRV_NAME
 610                        ": %s: no arp_interval value specified.\n",
 611                        bond->dev->name);
 612                 ret = -EINVAL;
 613                 goto out;
 614         }
 615         if (new_value < 0) {
 616                 printk(KERN_ERR DRV_NAME
 617                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 618                        bond->dev->name, new_value, INT_MAX);
 619                 ret = -EINVAL;
 620                 goto out;
 621         }
 622
 623         printk(KERN_INFO DRV_NAME
 624                ": %s: Setting ARP monitoring interval to %d.\n",
 625                bond->dev->name, new_value);
 626         bond->params.arp_interval = new_value;
 627         if (bond->params.miimon) {
 628                 printk(KERN_INFO DRV_NAME
 629                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 630                        "%s Disabling MII monitoring.\n",
 631                        bond->dev->name, bond->dev->name);
 632                 bond->params.miimon = 0;
 633                 if (delayed_work_pending(&bond->mii_work)) {
 634                         cancel_delayed_work(&bond->mii_work);
 635                         flush_workqueue(bond->wq);
 636                 }
 637         }
 638         if (!bond->params.arp_targets[0]) {
 639                 printk(KERN_INFO DRV_NAME
 640                        ": %s: ARP monitoring has been set up, "
 641                        "but no ARP targets have been specified.\n",
 642                        bond->dev->name);
 643         }
 644         if (bond->dev->flags & IFF_UP) {
 645                 /* If the interface is up, we may need to fire off
 646                  * the ARP timer.  If the interface is down, the
 647                  * timer will get fired off when the open function
 648                  * is called.
 649                  */
 650                 if (!delayed_work_pending(&bond->arp_work)) {
 651                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 652                                 INIT_DELAYED_WORK(&bond->arp_work,
 653                                                   bond_activebackup_arp_mon);
 654                         else
 655                                 INIT_DELAYED_WORK(&bond->arp_work,
 656                                                   bond_loadbalance_arp_mon);
 657
 658                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 659                 }
 660         }
 661
 662 out:
 663         return ret;
 664 }
 665 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 666
 667 /*
 668  * Show and set the arp targets.
 669  */
 670 static ssize_t bonding_show_arp_targets(struct device *d,
 671                                         struct device_attribute *attr,
 672                                         char *buf)
 673 {
 674         int i, res = 0;
 675         struct bonding *bond = to_bond(d);
 676
 677         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 678                 if (bond->params.arp_targets[i])
 679                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 680                                NIPQUAD(bond->params.arp_targets[i]));
 681         }
 682         if (res)
 683                 buf[res-1] = '\n'; /* eat the leftover space */
 684         return res;
 685 }
 686
 687 static ssize_t bonding_store_arp_targets(struct device *d,
 688                                          struct device_attribute *attr,
 689                                          const char *buf, size_t count)
 690 {
 691         __be32 newtarget;
 692         int i = 0, done = 0, ret = count;
 693         struct bonding *bond = to_bond(d);
 694         __be32 *targets;
 695
 696         targets = bond->params.arp_targets;
 697         newtarget = in_aton(buf + 1);
 698         /* look for adds */
 699         if (buf[0] == '+') {
 700                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 701                         printk(KERN_ERR DRV_NAME
 702                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 703                                bond->dev->name, NIPQUAD(newtarget));
 704                         ret = -EINVAL;
 705                         goto out;
 706                 }
 707                 /* look for an empty slot to put the target in, and check for dupes */
 708                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 709                         if (targets[i] == newtarget) { /* duplicate */
 710                                 printk(KERN_ERR DRV_NAME
 711                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 712                                        bond->dev->name, NIPQUAD(newtarget));
 713                                 if (done)
 714                                         targets[i] = 0;
 715                                 ret = -EINVAL;
 716                                 goto out;
 717                         }
 718                         if (targets[i] == 0 && !done) {
 719                                 printk(KERN_INFO DRV_NAME
 720                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 721                                        bond->dev->name, NIPQUAD(newtarget));
 722                                 done = 1;
 723                                 targets[i] = newtarget;
 724                         }
 725                 }
 726                 if (!done) {
 727                         printk(KERN_ERR DRV_NAME
 728                                ": %s: ARP target table is full!\n",
 729                                bond->dev->name);
 730                         ret = -EINVAL;
 731                         goto out;
 732                 }
 733
 734         }
 735         else if (buf[0] == '-') {
 736                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 737                         printk(KERN_ERR DRV_NAME
 738                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 739                                bond->dev->name, NIPQUAD(newtarget));
 740                         ret = -EINVAL;
 741                         goto out;
 742                 }
 743
 744                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 745                         if (targets[i] == newtarget) {
 746                                 printk(KERN_INFO DRV_NAME
 747                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 748                                        bond->dev->name, NIPQUAD(newtarget));
 749                                 targets[i] = 0;
 750                                 done = 1;
 751                         }
 752                 }
 753                 if (!done) {
 754                         printk(KERN_INFO DRV_NAME
 755                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 756                                bond->dev->name, NIPQUAD(newtarget));
 757                         ret = -EINVAL;
 758                         goto out;
 759                 }
 760         }
 761         else {
 762                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 763                         bond->dev->name);
 764                 ret = -EPERM;
 765                 goto out;
 766         }
 767
 768 out:
 769         return ret;
 770 }
 771 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 772
 773 /*
 774  * Show and set the up and down delays.  These must be multiples of the
 775  * MII monitoring value, and are stored internally as the multiplier.
 776  * Thus, we must translate to MS for the real world.
 777  */
 778 static ssize_t bonding_show_downdelay(struct device *d,
 779                                       struct device_attribute *attr,
 780                                       char *buf)
 781 {
 782         struct bonding *bond = to_bond(d);
 783
 784         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 785 }
 786
 787 static ssize_t bonding_store_downdelay(struct device *d,
 788                                        struct device_attribute *attr,
 789                                        const char *buf, size_t count)
 790 {
 791         int new_value, ret = count;
 792         struct bonding *bond = to_bond(d);
 793
 794         if (!(bond->params.miimon)) {
 795                 printk(KERN_ERR DRV_NAME
 796                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 797                        bond->dev->name);
 798                 ret = -EPERM;
 799                 goto out;
 800         }
 801
 802         if (sscanf(buf, "%d", &new_value) != 1) {
 803                 printk(KERN_ERR DRV_NAME
 804                        ": %s: no down delay value specified.\n",
 805                        bond->dev->name);
 806                 ret = -EINVAL;
 807                 goto out;
 808         }
 809         if (new_value < 0) {
 810                 printk(KERN_ERR DRV_NAME
 811                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 812                        bond->dev->name, new_value, 1, INT_MAX);
 813                 ret = -EINVAL;
 814                 goto out;
 815         } else {
 816                 if ((new_value % bond->params.miimon) != 0) {
 817                         printk(KERN_WARNING DRV_NAME
 818                                ": %s: Warning: down delay (%d) is not a multiple "
 819                                "of miimon (%d), delay rounded to %d ms\n",
 820                                bond->dev->name, new_value, bond->params.miimon,
 821                                (new_value / bond->params.miimon) *
 822                                bond->params.miimon);
 823                 }
 824                 bond->params.downdelay = new_value / bond->params.miimon;
 825                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 826                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 827
 828         }
 829
 830 out:
 831         return ret;
 832 }
 833 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 834
 835 static ssize_t bonding_show_updelay(struct device *d,
 836                                     struct device_attribute *attr,
 837                                     char *buf)
 838 {
 839         struct bonding *bond = to_bond(d);
 840
 841         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 842
 843 }
 844
 845 static ssize_t bonding_store_updelay(struct device *d,
 846                                      struct device_attribute *attr,
 847                                      const char *buf, size_t count)
 848 {
 849         int new_value, ret = count;
 850         struct bonding *bond = to_bond(d);
 851
 852         if (!(bond->params.miimon)) {
 853                 printk(KERN_ERR DRV_NAME
 854                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 855                        bond->dev->name);
 856                 ret = -EPERM;
 857                 goto out;
 858         }
 859
 860         if (sscanf(buf, "%d", &new_value) != 1) {
 861                 printk(KERN_ERR DRV_NAME
 862                        ": %s: no up delay value specified.\n",
 863                        bond->dev->name);
 864                 ret = -EINVAL;
 865                 goto out;
 866         }
 867         if (new_value < 0) {
 868                 printk(KERN_ERR DRV_NAME
 869                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 870                        bond->dev->name, new_value, 1, INT_MAX);
 871                 ret = -EINVAL;
 872                 goto out;
 873         } else {
 874                 if ((new_value % bond->params.miimon) != 0) {
 875                         printk(KERN_WARNING DRV_NAME
 876                                ": %s: Warning: up delay (%d) is not a multiple "
 877                                "of miimon (%d), updelay rounded to %d ms\n",
 878                                bond->dev->name, new_value, bond->params.miimon,
 879                                (new_value / bond->params.miimon) *
 880                                bond->params.miimon);
 881                 }
 882                 bond->params.updelay = new_value / bond->params.miimon;
 883                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 884                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 885
 886         }
 887
 888 out:
 889         return ret;
 890 }
 891 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 892
 893 /*
 894  * Show and set the LACP interval.  Interface must be down, and the mode
 895  * must be set to 802.3ad mode.
 896  */
 897 static ssize_t bonding_show_lacp(struct device *d,
 898                                  struct device_attribute *attr,
 899                                  char *buf)
 900 {
 901         struct bonding *bond = to_bond(d);
 902
 903         return sprintf(buf, "%s %d\n",
 904                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 905                 bond->params.lacp_fast);
 906 }
 907
 908 static ssize_t bonding_store_lacp(struct device *d,
 909                                   struct device_attribute *attr,
 910                                   const char *buf, size_t count)
 911 {
 912         int new_value, ret = count;
 913         struct bonding *bond = to_bond(d);
 914
 915         if (bond->dev->flags & IFF_UP) {
 916                 printk(KERN_ERR DRV_NAME
 917                        ": %s: Unable to update LACP rate because interface is up.\n",
 918                        bond->dev->name);
 919                 ret = -EPERM;
 920                 goto out;
 921         }
 922
 923         if (bond->params.mode != BOND_MODE_8023AD) {
 924                 printk(KERN_ERR DRV_NAME
 925                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 926                        bond->dev->name);
 927                 ret = -EPERM;
 928                 goto out;
 929         }
 930
 931         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 932
 933         if ((new_value == 1) || (new_value == 0)) {
 934                 bond->params.lacp_fast = new_value;
 935                 printk(KERN_INFO DRV_NAME
 936                        ": %s: Setting LACP rate to %s (%d).\n",
 937                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 938         } else {
 939                 printk(KERN_ERR DRV_NAME
 940                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 941                         bond->dev->name, (int)strlen(buf) - 1, buf);
 942                 ret = -EINVAL;
 943         }
 944 out:
 945         return ret;
 946 }
 947 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 948
 949 /*
 950  * Show and set the number of grat ARP to send after a failover event.
 951  */
 952 static ssize_t bonding_show_n_grat_arp(struct device *d,
 953                                    struct device_attribute *attr,
 954                                    char *buf)
 955 {
 956         struct bonding *bond = to_bond(d);
 957
 958         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
 959 }
 960
 961 static ssize_t bonding_store_n_grat_arp(struct device *d,
 962                                     struct device_attribute *attr,
 963                                     const char *buf, size_t count)
 964 {
 965         int new_value, ret = count;
 966         struct bonding *bond = to_bond(d);
 967
 968         if (sscanf(buf, "%d", &new_value) != 1) {
 969                 printk(KERN_ERR DRV_NAME
 970                        ": %s: no num_grat_arp value specified.\n",
 971                        bond->dev->name);
 972                 ret = -EINVAL;
 973                 goto out;
 974         }
 975         if (new_value < 0 || new_value > 255) {
 976                 printk(KERN_ERR DRV_NAME
 977                        ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
 978                        bond->dev->name, new_value);
 979                 ret = -EINVAL;
 980                 goto out;
 981         } else {
 982                 bond->params.num_grat_arp = new_value;
 983         }
 984 out:
 985         return ret;
 986 }
 987 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
 988 /*
 989  * Show and set the MII monitor interval.  There are two tricky bits
 990  * here.  First, if MII monitoring is activated, then we must disable
 991  * ARP monitoring.  Second, if the timer isn't running, we must
 992  * start it.
 993  */
 994 static ssize_t bonding_show_miimon(struct device *d,
 995                                    struct device_attribute *attr,
 996                                    char *buf)
 997 {
 998         struct bonding *bond = to_bond(d);
 999
1000         return sprintf(buf, "%d\n", bond->params.miimon);
1001 }
1002
1003 static ssize_t bonding_store_miimon(struct device *d,
1004                                     struct device_attribute *attr,
1005                                     const char *buf, size_t count)
1006 {
1007         int new_value, ret = count;
1008         struct bonding *bond = to_bond(d);
1009
1010         if (sscanf(buf, "%d", &new_value) != 1) {
1011                 printk(KERN_ERR DRV_NAME
1012                        ": %s: no miimon value specified.\n",
1013                        bond->dev->name);
1014                 ret = -EINVAL;
1015                 goto out;
1016         }
1017         if (new_value < 0) {
1018                 printk(KERN_ERR DRV_NAME
1019                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1020                        bond->dev->name, new_value, 1, INT_MAX);
1021                 ret = -EINVAL;
1022                 goto out;
1023         } else {
1024                 printk(KERN_INFO DRV_NAME
1025                        ": %s: Setting MII monitoring interval to %d.\n",
1026                        bond->dev->name, new_value);
1027                 bond->params.miimon = new_value;
1028                 if(bond->params.updelay)
1029                         printk(KERN_INFO DRV_NAME
1030                               ": %s: Note: Updating updelay (to %d) "
1031                               "since it is a multiple of the miimon value.\n",
1032                               bond->dev->name,
1033                               bond->params.updelay * bond->params.miimon);
1034                 if(bond->params.downdelay)
1035                         printk(KERN_INFO DRV_NAME
1036                               ": %s: Note: Updating downdelay (to %d) "
1037                               "since it is a multiple of the miimon value.\n",
1038                               bond->dev->name,
1039                               bond->params.downdelay * bond->params.miimon);
1040                 if (bond->params.arp_interval) {
1041                         printk(KERN_INFO DRV_NAME
1042                                ": %s: MII monitoring cannot be used with "
1043                                "ARP monitoring. Disabling ARP monitoring...\n",
1044                                bond->dev->name);
1045                         bond->params.arp_interval = 0;
1046                         if (bond->params.arp_validate) {
1047                                 bond_unregister_arp(bond);
1048                                 bond->params.arp_validate =
1049                                         BOND_ARP_VALIDATE_NONE;
1050                         }
1051                         if (delayed_work_pending(&bond->arp_work)) {
1052                                 cancel_delayed_work(&bond->arp_work);
1053                                 flush_workqueue(bond->wq);
1054                         }
1055                 }
1056
1057                 if (bond->dev->flags & IFF_UP) {
1058                         /* If the interface is up, we may need to fire off
1059                          * the MII timer. If the interface is down, the
1060                          * timer will get fired off when the open function
1061                          * is called.
1062                          */
1063                         if (!delayed_work_pending(&bond->mii_work)) {
1064                                 INIT_DELAYED_WORK(&bond->mii_work,
1065                                                   bond_mii_monitor);
1066                                 queue_delayed_work(bond->wq,
1067                                                    &bond->mii_work, 0);
1068                         }
1069                 }
1070         }
1071 out:
1072         return ret;
1073 }
1074 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1075
1076 /*
1077  * Show and set the primary slave.  The store function is much
1078  * simpler than bonding_store_slaves function because it only needs to
1079  * handle one interface name.
1080  * The bond must be a mode that supports a primary for this be
1081  * set.
1082  */
1083 static ssize_t bonding_show_primary(struct device *d,
1084                                     struct device_attribute *attr,
1085                                     char *buf)
1086 {
1087         int count = 0;
1088         struct bonding *bond = to_bond(d);
1089
1090         if (bond->primary_slave)
1091                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1092
1093         return count;
1094 }
1095
1096 static ssize_t bonding_store_primary(struct device *d,
1097                                      struct device_attribute *attr,
1098                                      const char *buf, size_t count)
1099 {
1100         int i;
1101         struct slave *slave;
1102         struct bonding *bond = to_bond(d);
1103
1104         rtnl_lock();
1105         read_lock(&bond->lock);
1106         write_lock_bh(&bond->curr_slave_lock);
1107
1108         if (!USES_PRIMARY(bond->params.mode)) {
1109                 printk(KERN_INFO DRV_NAME
1110                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1111                        bond->dev->name, bond->dev->name, bond->params.mode);
1112         } else {
1113                 bond_for_each_slave(bond, slave, i) {
1114                         if (strnicmp
1115                             (slave->dev->name, buf,
1116                              strlen(slave->dev->name)) == 0) {
1117                                 printk(KERN_INFO DRV_NAME
1118                                        ": %s: Setting %s as primary slave.\n",
1119                                        bond->dev->name, slave->dev->name);
1120                                 bond->primary_slave = slave;
1121                                 bond_select_active_slave(bond);
1122                                 goto out;
1123                         }
1124                 }
1125
1126                 /* if we got here, then we didn't match the name of any slave */
1127
1128                 if (strlen(buf) == 0 || buf[0] == '\n') {
1129                         printk(KERN_INFO DRV_NAME
1130                                ": %s: Setting primary slave to None.\n",
1131                                bond->dev->name);
1132                         bond->primary_slave = NULL;
1133                                 bond_select_active_slave(bond);
1134                 } else {
1135                         printk(KERN_INFO DRV_NAME
1136                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1137                                bond->dev->name, (int)strlen(buf) - 1, buf);
1138                 }
1139         }
1140 out:
1141         write_unlock_bh(&bond->curr_slave_lock);
1142         read_unlock(&bond->lock);
1143         rtnl_unlock();
1144
1145         return count;
1146 }
1147 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1148
1149 /*
1150  * Show and set the use_carrier flag.
1151  */
1152 static ssize_t bonding_show_carrier(struct device *d,
1153                                     struct device_attribute *attr,
1154                                     char *buf)
1155 {
1156         struct bonding *bond = to_bond(d);
1157
1158         return sprintf(buf, "%d\n", bond->params.use_carrier);
1159 }
1160
1161 static ssize_t bonding_store_carrier(struct device *d,
1162                                      struct device_attribute *attr,
1163                                      const char *buf, size_t count)
1164 {
1165         int new_value, ret = count;
1166         struct bonding *bond = to_bond(d);
1167
1168
1169         if (sscanf(buf, "%d", &new_value) != 1) {
1170                 printk(KERN_ERR DRV_NAME
1171                        ": %s: no use_carrier value specified.\n",
1172                        bond->dev->name);
1173                 ret = -EINVAL;
1174                 goto out;
1175         }
1176         if ((new_value == 0) || (new_value == 1)) {
1177                 bond->params.use_carrier = new_value;
1178                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1179                        bond->dev->name, new_value);
1180         } else {
1181                 printk(KERN_INFO DRV_NAME
1182                        ": %s: Ignoring invalid use_carrier value %d.\n",
1183                        bond->dev->name, new_value);
1184         }
1185 out:
1186         return count;
1187 }
1188 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1189
1190
1191 /*
1192  * Show and set currently active_slave.
1193  */
1194 static ssize_t bonding_show_active_slave(struct device *d,
1195                                          struct device_attribute *attr,
1196                                          char *buf)
1197 {
1198         struct slave *curr;
1199         struct bonding *bond = to_bond(d);
1200         int count = 0;
1201
1202         read_lock(&bond->curr_slave_lock);
1203         curr = bond->curr_active_slave;
1204         read_unlock(&bond->curr_slave_lock);
1205
1206         if (USES_PRIMARY(bond->params.mode) && curr)
1207                 count = sprintf(buf, "%s\n", curr->dev->name);
1208         return count;
1209 }
1210
1211 static ssize_t bonding_store_active_slave(struct device *d,
1212                                           struct device_attribute *attr,
1213                                           const char *buf, size_t count)
1214 {
1215         int i;
1216         struct slave *slave;
1217         struct slave *old_active = NULL;
1218         struct slave *new_active = NULL;
1219         struct bonding *bond = to_bond(d);
1220
1221         rtnl_lock();
1222         read_lock(&bond->lock);
1223         write_lock_bh(&bond->curr_slave_lock);
1224
1225         if (!USES_PRIMARY(bond->params.mode)) {
1226                 printk(KERN_INFO DRV_NAME
1227                        ": %s: Unable to change active slave; %s is in mode %d\n",
1228                        bond->dev->name, bond->dev->name, bond->params.mode);
1229         } else {
1230                 bond_for_each_slave(bond, slave, i) {
1231                         if (strnicmp
1232                             (slave->dev->name, buf,
1233                              strlen(slave->dev->name)) == 0) {
1234                                 old_active = bond->curr_active_slave;
1235                                 new_active = slave;
1236                                 if (new_active == old_active) {
1237                                         /* do nothing */
1238                                         printk(KERN_INFO DRV_NAME
1239                                                ": %s: %s is already the current active slave.\n",
1240                                                bond->dev->name, slave->dev->name);
1241                                         goto out;
1242                                 }
1243                                 else {
1244                                         if ((new_active) &&
1245                                             (old_active) &&
1246                                             (new_active->link == BOND_LINK_UP) &&
1247                                             IS_UP(new_active->dev)) {
1248                                                 printk(KERN_INFO DRV_NAME
1249                                                       ": %s: Setting %s as active slave.\n",
1250                                                       bond->dev->name, slave->dev->name);
1251                                                 bond_change_active_slave(bond, new_active);
1252                                         }
1253                                         else {
1254                                                 printk(KERN_INFO DRV_NAME
1255                                                       ": %s: Could not set %s as active slave; "
1256                                                       "either %s is down or the link is down.\n",
1257                                                       bond->dev->name, slave->dev->name,
1258                                                       slave->dev->name);
1259                                         }
1260                                         goto out;
1261                                 }
1262                         }
1263                 }
1264
1265                 /* if we got here, then we didn't match the name of any slave */
1266
1267                 if (strlen(buf) == 0 || buf[0] == '\n') {
1268                         printk(KERN_INFO DRV_NAME
1269                                ": %s: Setting active slave to None.\n",
1270                                bond->dev->name);
1271                         bond->primary_slave = NULL;
1272                                 bond_select_active_slave(bond);
1273                 } else {
1274                         printk(KERN_INFO DRV_NAME
1275                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1276                                bond->dev->name, (int)strlen(buf) - 1, buf);
1277                 }
1278         }
1279 out:
1280         write_unlock_bh(&bond->curr_slave_lock);
1281         read_unlock(&bond->lock);
1282         rtnl_unlock();
1283
1284         return count;
1285
1286 }
1287 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1288
1289
1290 /*
1291  * Show link status of the bond interface.
1292  */
1293 static ssize_t bonding_show_mii_status(struct device *d,
1294                                        struct device_attribute *attr,
1295                                        char *buf)
1296 {
1297         struct slave *curr;
1298         struct bonding *bond = to_bond(d);
1299
1300         read_lock(&bond->curr_slave_lock);
1301         curr = bond->curr_active_slave;
1302         read_unlock(&bond->curr_slave_lock);
1303
1304         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1305 }
1306 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1307
1308
1309 /*
1310  * Show current 802.3ad aggregator ID.
1311  */
1312 static ssize_t bonding_show_ad_aggregator(struct device *d,
1313                                           struct device_attribute *attr,
1314                                           char *buf)
1315 {
1316         int count = 0;
1317         struct bonding *bond = to_bond(d);
1318
1319         if (bond->params.mode == BOND_MODE_8023AD) {
1320                 struct ad_info ad_info;
1321                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1322         }
1323
1324         return count;
1325 }
1326 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1327
1328
1329 /*
1330  * Show number of active 802.3ad ports.
1331  */
1332 static ssize_t bonding_show_ad_num_ports(struct device *d,
1333                                          struct device_attribute *attr,
1334                                          char *buf)
1335 {
1336         int count = 0;
1337         struct bonding *bond = to_bond(d);
1338
1339         if (bond->params.mode == BOND_MODE_8023AD) {
1340                 struct ad_info ad_info;
1341                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1342         }
1343
1344         return count;
1345 }
1346 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1347
1348
1349 /*
1350  * Show current 802.3ad actor key.
1351  */
1352 static ssize_t bonding_show_ad_actor_key(struct device *d,
1353                                          struct device_attribute *attr,
1354                                          char *buf)
1355 {
1356         int count = 0;
1357         struct bonding *bond = to_bond(d);
1358
1359         if (bond->params.mode == BOND_MODE_8023AD) {
1360                 struct ad_info ad_info;
1361                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1362         }
1363
1364         return count;
1365 }
1366 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1367
1368
1369 /*
1370  * Show current 802.3ad partner key.
1371  */
1372 static ssize_t bonding_show_ad_partner_key(struct device *d,
1373                                            struct device_attribute *attr,
1374                                            char *buf)
1375 {
1376         int count = 0;
1377         struct bonding *bond = to_bond(d);
1378
1379         if (bond->params.mode == BOND_MODE_8023AD) {
1380                 struct ad_info ad_info;
1381                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1382         }
1383
1384         return count;
1385 }
1386 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1387
1388
1389 /*
1390  * Show current 802.3ad partner mac.
1391  */
1392 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1393                                            struct device_attribute *attr,
1394                                            char *buf)
1395 {
1396         int count = 0;
1397         struct bonding *bond = to_bond(d);
1398         DECLARE_MAC_BUF(mac);
1399
1400         if (bond->params.mode == BOND_MODE_8023AD) {
1401                 struct ad_info ad_info;
1402                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1403                         count = sprintf(buf,"%s\n",
1404                                         print_mac(mac, ad_info.partner_system));
1405                 }
1406         }
1407
1408         return count;
1409 }
1410 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1411
1412
1413
1414 static struct attribute *per_bond_attrs[] = {
1415         &dev_attr_slaves.attr,
1416         &dev_attr_mode.attr,
1417         &dev_attr_fail_over_mac.attr,
1418         &dev_attr_arp_validate.attr,
1419         &dev_attr_arp_interval.attr,
1420         &dev_attr_arp_ip_target.attr,
1421         &dev_attr_downdelay.attr,
1422         &dev_attr_updelay.attr,
1423         &dev_attr_lacp_rate.attr,
1424         &dev_attr_xmit_hash_policy.attr,
1425         &dev_attr_num_grat_arp.attr,
1426         &dev_attr_miimon.attr,
1427         &dev_attr_primary.attr,
1428         &dev_attr_use_carrier.attr,
1429         &dev_attr_active_slave.attr,
1430         &dev_attr_mii_status.attr,
1431         &dev_attr_ad_aggregator.attr,
1432         &dev_attr_ad_num_ports.attr,
1433         &dev_attr_ad_actor_key.attr,
1434         &dev_attr_ad_partner_key.attr,
1435         &dev_attr_ad_partner_mac.attr,
1436         NULL,
1437 };
1438
1439 static struct attribute_group bonding_group = {
1440         .name = "bonding",
1441         .attrs = per_bond_attrs,
1442 };
1443
1444 /*
1445  * Initialize sysfs.  This sets up the bonding_masters file in
1446  * /sys/class/net.
1447  */
1448 int bond_create_sysfs(void)
1449 {
1450         int ret = 0;
1451         struct bonding *firstbond;
1452
1453         /* get the netdev class pointer */
1454         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1455         if (!firstbond)
1456                 return -ENODEV;
1457
1458         netdev_class = firstbond->dev->dev.class;
1459         if (!netdev_class)
1460                 return -ENODEV;
1461
1462         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1463         /*
1464          * Permit multiple loads of the module by ignoring failures to
1465          * create the bonding_masters sysfs file.  Bonding devices
1466          * created by second or subsequent loads of the module will
1467          * not be listed in, or controllable by, bonding_masters, but
1468          * will have the usual "bonding" sysfs directory.
1469          *
1470          * This is done to preserve backwards compatibility for
1471          * initscripts/sysconfig, which load bonding multiple times to
1472          * configure multiple bonding devices.
1473          */
1474         if (ret == -EEXIST) {
1475                 /* Is someone being kinky and naming a device bonding_master? */
1476                 if (__dev_get_by_name(&init_net,
1477                                       class_attr_bonding_masters.attr.name))
1478                         printk(KERN_ERR
1479                                "network device named %s already exists in sysfs",
1480                                class_attr_bonding_masters.attr.name);
1481                 else {
1482                         netdev_class = NULL;
1483                         return 0;
1484                 }
1485         }
1486
1487         return ret;
1488
1489 }
1490
1491 /*
1492  * Remove /sys/class/net/bonding_masters.
1493  */
1494 void bond_destroy_sysfs(void)
1495 {
1496         if (netdev_class)
1497                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1498 }
1499
1500 /*
1501  * Initialize sysfs for each bond.  This sets up and registers
1502  * the 'bondctl' directory for each individual bond under /sys/class/net.
1503  */
1504 int bond_create_sysfs_entry(struct bonding *bond)
1505 {
1506         struct net_device *dev = bond->dev;
1507         int err;
1508
1509         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1510         if (err) {
1511                 printk(KERN_EMERG "eek! didn't create group!\n");
1512         }
1513
1514         if (expected_refcount < 1)
1515                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1516
1517         return err;
1518 }
1519 /*
1520  * Remove sysfs entries for each bond.
1521  */
1522 void bond_destroy_sysfs_entry(struct bonding *bond)
1523 {
1524         struct net_device *dev = bond->dev;
1525
1526         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1527 }
1528