SAFE public projects git trees. - safe/jmp/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  * Changes:
  24  *
  25  * 2004/12/12 - Mitch Williams <mitch.a.williams at intel dot com>
  26  *      - Initial creation of sysfs interface.
  27  *
  28  * 2005/06/22 - Radheka Godse <radheka.godse at intel dot com>
  29  *      - Added ifenslave -c type functionality to sysfs
  30  *      - Added sysfs files for attributes such as  MII Status and
  31  *        802.3ad aggregator that are displayed in /proc
  32  *      - Added "name value" format to sysfs "mode" and
  33  *        "lacp_rate", for e.g., "active-backup 1" or "slow 0" for
  34  *        consistency and ease of script parsing
  35  *      - Fixed reversal of octets in arp_ip_targets via sysfs
  36  *      - sysfs support to handle bond interface re-naming
  37  *      - Moved all sysfs entries into /sys/class/net instead of
  38  *        of using a standalone subsystem.
  39  *      - Added sysfs symlinks between masters and slaves
  40  *      - Corrected bugs in sysfs unload path when creating bonds
  41  *        with existing interface names.
  42  *      - Removed redundant sysfs stat file since it duplicates slave info
  43  *        from the proc file
  44  *      - Fixed errors in sysfs show/store arp targets.
  45  *      - For consistency with ifenslave, instead of exiting
  46  *        with an error, updated bonding sysfs to
  47  *        close and attempt to enslave an up adapter.
  48  *      - Fixed NULL dereference when adding a slave interface
  49  *        that does not exist.
  50  *      - Added checks in sysfs bonding to reject invalid ip addresses
  51  *      - Synch up with post linux-2.6.12 bonding changes
  52  *      - Created sysfs bond attrib for xmit_hash_policy
  53  *
  54  * 2005/09/19 - Mitch Williams <mitch.a.williams at intel dot com>
  55  *      - Changed semantics of multi-item files to be command-based
  56  *        instead of list-based.
  57  *      - Changed ARP target handler to use in_aton instead of sscanf
  58  *      - Style changes.
  59  * 2005/09/27 - Mitch Williams <mitch.a.williams at intel dot com>
  60  *      - Made line endings consistent.
  61  *      - Removed "none" from primary output - just put blank instead
  62  *      - Fixed bug with long interface names
  63  */
  64 #include <linux/config.h>
  65 #include <linux/kernel.h>
  66 #include <linux/module.h>
  67 #include <linux/sched.h>
  68 #include <linux/device.h>
  69 #include <linux/sysdev.h>
  70 #include <linux/fs.h>
  71 #include <linux/types.h>
  72 #include <linux/string.h>
  73 #include <linux/netdevice.h>
  74 #include <linux/inetdevice.h>
  75 #include <linux/in.h>
  76 #include <linux/sysfs.h>
  77 #include <linux/string.h>
  78 #include <linux/ctype.h>
  79 #include <linux/inet.h>
  80 #include <linux/rtnetlink.h>
  81
  82 /* #define BONDING_DEBUG 1 */
  83 #include "bonding.h"
  84 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
  85 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
  86 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  87
  88 /*---------------------------- Declarations -------------------------------*/
  89
  90
  91 extern struct list_head bond_dev_list;
  92 extern struct bond_params bonding_defaults;
  93 extern struct bond_parm_tbl bond_mode_tbl[];
  94 extern struct bond_parm_tbl bond_lacp_tbl[];
  95 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  96
  97 static int expected_refcount = -1;
  98 static struct class *netdev_class;
  99 /*--------------------------- Data Structures -----------------------------*/
 100
 101 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
 102  * Because kobject_register tries to acquire the subsystem lock.  If
 103  * we already hold the lock (which we would if the user was creating
 104  * a new bond through the sysfs interface), we deadlock.
 105  * This lock is only needed when deleting a bond - we need to make sure
 106  * that we don't collide with an ongoing ioctl.
 107  */
 108
 109 struct rw_semaphore bonding_rwsem;
 110
 111
 112
 113
 114 /*------------------------------ Functions --------------------------------*/
 115
 116 /*
 117  * "show" function for the bond_masters attribute.
 118  * The class parameter is ignored.
 119  */
 120 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
 121 {
 122         int res = 0;
 123         struct bonding *bond;
 124
 125         down_read(&(bonding_rwsem));
 126
 127         list_for_each_entry(bond, &bond_dev_list, bond_list) {
 128                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 129                         /* not enough space for another interface name */
 130                         if ((PAGE_SIZE - res) > 10)
 131                                 res = PAGE_SIZE - 10;
 132                         res += sprintf(buffer + res, "++more++");
 133                         break;
 134                 }
 135                 res += sprintf(buffer + res, "%s ",
 136                                bond->dev->name);
 137         }
 138         res += sprintf(buffer + res, "\n");
 139         res++;
 140         up_read(&(bonding_rwsem));
 141         return res;
 142 }
 143
 144 /*
 145  * "store" function for the bond_masters attribute.  This is what
 146  * creates and deletes entire bonds.
 147  *
 148  * The class parameter is ignored.
 149  *
 150  */
 151
 152 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 153 {
 154         char command[IFNAMSIZ + 1] = {0, };
 155         char *ifname;
 156         int res = count;
 157         struct bonding *bond;
 158         struct bonding *nxt;
 159
 160         down_write(&(bonding_rwsem));
 161         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 162         ifname = command + 1;
 163         if ((strlen(command) <= 1) ||
 164             !dev_valid_name(ifname))
 165                 goto err_no_cmd;
 166
 167         if (command[0] == '+') {
 168
 169                 /* Check to see if the bond already exists. */
 170                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 171                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 172                                 printk(KERN_ERR DRV_NAME
 173                                         ": cannot add bond %s; it already exists\n",
 174                                         ifname);
 175                                 res = -EPERM;
 176                                 goto out;
 177                         }
 178
 179                 printk(KERN_INFO DRV_NAME
 180                         ": %s is being created...\n", ifname);
 181                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 182                         printk(KERN_INFO DRV_NAME
 183                         ": %s interface already exists. Bond creation failed.\n",
 184                         ifname);
 185                         res = -EPERM;
 186                 }
 187                 goto out;
 188         }
 189
 190         if (command[0] == '-') {
 191                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 192                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 193                                 rtnl_lock();
 194                                 /* check the ref count on the bond's kobject.
 195                                  * If it's > expected, then there's a file open,
 196                                  * and we have to fail.
 197                                  */
 198                                 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
 199                                                         > expected_refcount){
 200                                         rtnl_unlock();
 201                                         printk(KERN_INFO DRV_NAME
 202                                                 ": Unable remove bond %s due to open references.\n",
 203                                                 ifname);
 204                                         res = -EPERM;
 205                                         goto out;
 206                                 }
 207                                 printk(KERN_INFO DRV_NAME
 208                                         ": %s is being deleted...\n",
 209                                         bond->dev->name);
 210                                 unregister_netdevice(bond->dev);
 211                                 bond_deinit(bond->dev);
 212                                 bond_destroy_sysfs_entry(bond);
 213                                 rtnl_unlock();
 214                                 goto out;
 215                         }
 216
 217                 printk(KERN_ERR DRV_NAME
 218                         ": unable to delete non-existent bond %s\n", ifname);
 219                 res = -ENODEV;
 220                 goto out;
 221         }
 222
 223 err_no_cmd:
 224         printk(KERN_ERR DRV_NAME
 225                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 226         res = -EPERM;
 227
 228         /* Always return either count or an error.  If you return 0, you'll
 229          * get called forever, which is bad.
 230          */
 231 out:
 232         up_write(&(bonding_rwsem));
 233         return res;
 234 }
 235 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 236 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 237                   bonding_show_bonds, bonding_store_bonds);
 238
 239 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 240 {
 241         char linkname[IFNAMSIZ+7];
 242         int ret = 0;
 243
 244         /* first, create a link from the slave back to the master */
 245         ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
 246                                 "master");
 247         if (ret)
 248                 return ret;
 249         /* next, create a link from the master to the slave */
 250         sprintf(linkname,"slave_%s",slave->name);
 251         ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
 252                                 linkname);
 253         return ret;
 254
 255 }
 256
 257 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 258 {
 259         char linkname[IFNAMSIZ+7];
 260
 261         sysfs_remove_link(&(slave->class_dev.kobj), "master");
 262         sprintf(linkname,"slave_%s",slave->name);
 263         sysfs_remove_link(&(master->class_dev.kobj), linkname);
 264 }
 265
 266
 267 /*
 268  * Show the slaves in the current bond.
 269  */
 270 static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
 271 {
 272         struct slave *slave;
 273         int i, res = 0;
 274         struct bonding *bond = to_bond(cd);
 275
 276         read_lock_bh(&bond->lock);
 277         bond_for_each_slave(bond, slave, i) {
 278                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 279                         /* not enough space for another interface name */
 280                         if ((PAGE_SIZE - res) > 10)
 281                                 res = PAGE_SIZE - 10;
 282                         res += sprintf(buf + res, "++more++");
 283                         break;
 284                 }
 285                 res += sprintf(buf + res, "%s ", slave->dev->name);
 286         }
 287         read_unlock_bh(&bond->lock);
 288         res += sprintf(buf + res, "\n");
 289         res++;
 290         return res;
 291 }
 292
 293 /*
 294  * Set the slaves in the current bond.  The bond interface must be
 295  * up for this to succeed.
 296  * This function is largely the same flow as bonding_update_bonds().
 297  */
 298 static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
 299 {
 300         char command[IFNAMSIZ + 1] = { 0, };
 301         char *ifname;
 302         int i, res, found, ret = count;
 303         struct slave *slave;
 304         struct net_device *dev = 0;
 305         struct bonding *bond = to_bond(cd);
 306
 307         /* Quick sanity check -- is the bond interface up? */
 308         if (!(bond->dev->flags & IFF_UP)) {
 309                 printk(KERN_ERR DRV_NAME
 310                        ": %s: Unable to update slaves because interface is down.\n",
 311                        bond->dev->name);
 312                 ret = -EPERM;
 313                 goto out;
 314         }
 315
 316         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 317
 318         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 319         ifname = command + 1;
 320         if ((strlen(command) <= 1) ||
 321             !dev_valid_name(ifname))
 322                 goto err_no_cmd;
 323
 324         if (command[0] == '+') {
 325
 326                 /* Got a slave name in ifname.  Is it already in the list? */
 327                 found = 0;
 328                 read_lock_bh(&bond->lock);
 329                 bond_for_each_slave(bond, slave, i)
 330                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 331                                 printk(KERN_ERR DRV_NAME
 332                                        ": %s: Interface %s is already enslaved!\n",
 333                                        bond->dev->name, ifname);
 334                                 ret = -EPERM;
 335                                 read_unlock_bh(&bond->lock);
 336                                 goto out;
 337                         }
 338
 339                 read_unlock_bh(&bond->lock);
 340                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 341                        bond->dev->name, ifname);
 342                 dev = dev_get_by_name(ifname);
 343                 if (!dev) {
 344                         printk(KERN_INFO DRV_NAME
 345                                ": %s: Interface %s does not exist!\n",
 346                                bond->dev->name, ifname);
 347                         ret = -EPERM;
 348                         goto out;
 349                 }
 350                 else
 351                         dev_put(dev);
 352
 353                 if (dev->flags & IFF_UP) {
 354                         printk(KERN_ERR DRV_NAME
 355                                ": %s: Error: Unable to enslave %s "
 356                                "because it is already up.\n",
 357                                bond->dev->name, dev->name);
 358                         ret = -EPERM;
 359                         goto out;
 360                 }
 361                 /* If this is the first slave, then we need to set
 362                    the master's hardware address to be the same as the
 363                    slave's. */
 364                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 365                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 366                                dev->addr_len);
 367                 }
 368
 369                 /* Set the slave's MTU to match the bond */
 370                 if (dev->mtu != bond->dev->mtu) {
 371                         if (dev->change_mtu) {
 372                                 res = dev->change_mtu(dev,
 373                                                       bond->dev->mtu);
 374                                 if (res) {
 375                                         ret = res;
 376                                         goto out;
 377                                 }
 378                         } else {
 379                                 dev->mtu = bond->dev->mtu;
 380                         }
 381                 }
 382                 rtnl_lock();
 383                 res = bond_enslave(bond->dev, dev);
 384                 rtnl_unlock();
 385                 if (res) {
 386                         ret = res;
 387                 }
 388                 goto out;
 389         }
 390
 391         if (command[0] == '-') {
 392                 dev = NULL;
 393                 bond_for_each_slave(bond, slave, i)
 394                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 395                                 dev = slave->dev;
 396                                 break;
 397                         }
 398                 if (dev) {
 399                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 400                                 bond->dev->name, dev->name);
 401                         rtnl_lock();
 402                         res = bond_release(bond->dev, dev);
 403                         rtnl_unlock();
 404                         if (res) {
 405                                 ret = res;
 406                                 goto out;
 407                         }
 408                         /* set the slave MTU to the default */
 409                         if (dev->change_mtu) {
 410                                 dev->change_mtu(dev, 1500);
 411                         } else {
 412                                 dev->mtu = 1500;
 413                         }
 414                 }
 415                 else {
 416                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 417                                 ifname, bond->dev->name);
 418                         ret = -ENODEV;
 419                 }
 420                 goto out;
 421         }
 422
 423 err_no_cmd:
 424         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 425         ret = -EPERM;
 426
 427 out:
 428         return ret;
 429 }
 430
 431 static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 432
 433 /*
 434  * Show and set the bonding mode.  The bond interface must be down to
 435  * change the mode.
 436  */
 437 static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
 438 {
 439         struct bonding *bond = to_bond(cd);
 440
 441         return sprintf(buf, "%s %d\n",
 442                         bond_mode_tbl[bond->params.mode].modename,
 443                         bond->params.mode) + 1;
 444 }
 445
 446 static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
 447 {
 448         int new_value, ret = count;
 449         struct bonding *bond = to_bond(cd);
 450
 451         if (bond->dev->flags & IFF_UP) {
 452                 printk(KERN_ERR DRV_NAME
 453                        ": unable to update mode of %s because interface is up.\n",
 454                        bond->dev->name);
 455                 ret = -EPERM;
 456                 goto out;
 457         }
 458
 459         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 460         if (new_value < 0)  {
 461                 printk(KERN_ERR DRV_NAME
 462                        ": %s: Ignoring invalid mode value %.*s.\n",
 463                        bond->dev->name,
 464                        (int)strlen(buf) - 1, buf);
 465                 ret = -EINVAL;
 466                 goto out;
 467         } else {
 468                 bond->params.mode = new_value;
 469                 bond_set_mode_ops(bond, bond->params.mode);
 470                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 471                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 472         }
 473 out:
 474         return ret;
 475 }
 476 static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 477
 478 /*
 479  * Show and set the bonding transmit hash method.  The bond interface must be down to
 480  * change the xmit hash policy.
 481  */
 482 static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
 483 {
 484         int count;
 485         struct bonding *bond = to_bond(cd);
 486
 487         if ((bond->params.mode != BOND_MODE_XOR) &&
 488             (bond->params.mode != BOND_MODE_8023AD)) {
 489                 // Not Applicable
 490                 count = sprintf(buf, "NA\n") + 1;
 491         } else {
 492                 count = sprintf(buf, "%s %d\n",
 493                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 494                         bond->params.xmit_policy) + 1;
 495         }
 496
 497         return count;
 498 }
 499
 500 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
 501 {
 502         int new_value, ret = count;
 503         struct bonding *bond = to_bond(cd);
 504
 505         if (bond->dev->flags & IFF_UP) {
 506                 printk(KERN_ERR DRV_NAME
 507                        "%s: Interface is up. Unable to update xmit policy.\n",
 508                        bond->dev->name);
 509                 ret = -EPERM;
 510                 goto out;
 511         }
 512
 513         if ((bond->params.mode != BOND_MODE_XOR) &&
 514             (bond->params.mode != BOND_MODE_8023AD)) {
 515                 printk(KERN_ERR DRV_NAME
 516                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 517                        bond->dev->name);
 518                 ret = -EPERM;
 519                 goto out;
 520         }
 521
 522         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 523         if (new_value < 0)  {
 524                 printk(KERN_ERR DRV_NAME
 525                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 526                        bond->dev->name,
 527                        (int)strlen(buf) - 1, buf);
 528                 ret = -EINVAL;
 529                 goto out;
 530         } else {
 531                 bond->params.xmit_policy = new_value;
 532                 bond_set_mode_ops(bond, bond->params.mode);
 533                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 534                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 535         }
 536 out:
 537         return ret;
 538 }
 539 static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 540
 541 /*
 542  * Show and set the arp timer interval.  There are two tricky bits
 543  * here.  First, if ARP monitoring is activated, then we must disable
 544  * MII monitoring.  Second, if the ARP timer isn't running, we must
 545  * start it.
 546  */
 547 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
 548 {
 549         struct bonding *bond = to_bond(cd);
 550
 551         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 552 }
 553
 554 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
 555 {
 556         int new_value, ret = count;
 557         struct bonding *bond = to_bond(cd);
 558
 559         if (sscanf(buf, "%d", &new_value) != 1) {
 560                 printk(KERN_ERR DRV_NAME
 561                        ": %s: no arp_interval value specified.\n",
 562                        bond->dev->name);
 563                 ret = -EINVAL;
 564                 goto out;
 565         }
 566         if (new_value < 0) {
 567                 printk(KERN_ERR DRV_NAME
 568                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 569                        bond->dev->name, new_value, INT_MAX);
 570                 ret = -EINVAL;
 571                 goto out;
 572         }
 573
 574         printk(KERN_INFO DRV_NAME
 575                ": %s: Setting ARP monitoring interval to %d.\n",
 576                bond->dev->name, new_value);
 577         bond->params.arp_interval = new_value;
 578         if (bond->params.miimon) {
 579                 printk(KERN_INFO DRV_NAME
 580                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 581                        "%s Disabling MII monitoring.\n",
 582                        bond->dev->name, bond->dev->name);
 583                 bond->params.miimon = 0;
 584                 /* Kill MII timer, else it brings bond's link down */
 585                 if (bond->arp_timer.function) {
 586                         printk(KERN_INFO DRV_NAME
 587                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 588                        bond->dev->name);
 589                         del_timer_sync(&bond->mii_timer);
 590                 }
 591         }
 592         if (!bond->params.arp_targets[0]) {
 593                 printk(KERN_INFO DRV_NAME
 594                        ": %s: ARP monitoring has been set up, "
 595                        "but no ARP targets have been specified.\n",
 596                        bond->dev->name);
 597         }
 598         if (bond->dev->flags & IFF_UP) {
 599                 /* If the interface is up, we may need to fire off
 600                  * the ARP timer.  If the interface is down, the
 601                  * timer will get fired off when the open function
 602                  * is called.
 603                  */
 604                 if (bond->arp_timer.function) {
 605                         /* The timer's already set up, so fire it off */
 606                         mod_timer(&bond->arp_timer, jiffies + 1);
 607                 } else {
 608                         /* Set up the timer. */
 609                         init_timer(&bond->arp_timer);
 610                         bond->arp_timer.expires = jiffies + 1;
 611                         bond->arp_timer.data =
 612                                 (unsigned long) bond->dev;
 613                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 614                                 bond->arp_timer.function =
 615                                         (void *)
 616                                         &bond_activebackup_arp_mon;
 617                         } else {
 618                                 bond->arp_timer.function =
 619                                         (void *)
 620                                         &bond_loadbalance_arp_mon;
 621                         }
 622                         add_timer(&bond->arp_timer);
 623                 }
 624         }
 625
 626 out:
 627         return ret;
 628 }
 629 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 630
 631 /*
 632  * Show and set the arp targets.
 633  */
 634 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
 635 {
 636         int i, res = 0;
 637         struct bonding *bond = to_bond(cd);
 638
 639         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 640                 if (bond->params.arp_targets[i])
 641                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 642                                NIPQUAD(bond->params.arp_targets[i]));
 643         }
 644         if (res)
 645                 res--;  /* eat the leftover space */
 646         res += sprintf(buf + res, "\n");
 647         res++;
 648         return res;
 649 }
 650
 651 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
 652 {
 653         u32 newtarget;
 654         int i = 0, done = 0, ret = count;
 655         struct bonding *bond = to_bond(cd);
 656         u32 *targets;
 657
 658         targets = bond->params.arp_targets;
 659         newtarget = in_aton(buf + 1);
 660         /* look for adds */
 661         if (buf[0] == '+') {
 662                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 663                         printk(KERN_ERR DRV_NAME
 664                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 665                                bond->dev->name, NIPQUAD(newtarget));
 666                         ret = -EINVAL;
 667                         goto out;
 668                 }
 669                 /* look for an empty slot to put the target in, and check for dupes */
 670                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 671                         if (targets[i] == newtarget) { /* duplicate */
 672                                 printk(KERN_ERR DRV_NAME
 673                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 674                                        bond->dev->name, NIPQUAD(newtarget));
 675                                 if (done)
 676                                         targets[i] = 0;
 677                                 ret = -EINVAL;
 678                                 goto out;
 679                         }
 680                         if (targets[i] == 0 && !done) {
 681                                 printk(KERN_INFO DRV_NAME
 682                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 683                                        bond->dev->name, NIPQUAD(newtarget));
 684                                 done = 1;
 685                                 targets[i] = newtarget;
 686                         }
 687                 }
 688                 if (!done) {
 689                         printk(KERN_ERR DRV_NAME
 690                                ": %s: ARP target table is full!\n",
 691                                bond->dev->name);
 692                         ret = -EINVAL;
 693                         goto out;
 694                 }
 695
 696         }
 697         else if (buf[0] == '-') {
 698                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 699                         printk(KERN_ERR DRV_NAME
 700                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 701                                bond->dev->name, NIPQUAD(newtarget));
 702                         ret = -EINVAL;
 703                         goto out;
 704                 }
 705
 706                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 707                         if (targets[i] == newtarget) {
 708                                 printk(KERN_INFO DRV_NAME
 709                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 710                                        bond->dev->name, NIPQUAD(newtarget));
 711                                 targets[i] = 0;
 712                                 done = 1;
 713                         }
 714                 }
 715                 if (!done) {
 716                         printk(KERN_INFO DRV_NAME
 717                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 718                                bond->dev->name, NIPQUAD(newtarget));
 719                         ret = -EINVAL;
 720                         goto out;
 721                 }
 722         }
 723         else {
 724                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 725                         bond->dev->name);
 726                 ret = -EPERM;
 727                 goto out;
 728         }
 729
 730 out:
 731         return ret;
 732 }
 733 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 734
 735 /*
 736  * Show and set the up and down delays.  These must be multiples of the
 737  * MII monitoring value, and are stored internally as the multiplier.
 738  * Thus, we must translate to MS for the real world.
 739  */
 740 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
 741 {
 742         struct bonding *bond = to_bond(cd);
 743
 744         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 745 }
 746
 747 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
 748 {
 749         int new_value, ret = count;
 750         struct bonding *bond = to_bond(cd);
 751
 752         if (!(bond->params.miimon)) {
 753                 printk(KERN_ERR DRV_NAME
 754                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 755                        bond->dev->name);
 756                 ret = -EPERM;
 757                 goto out;
 758         }
 759
 760         if (sscanf(buf, "%d", &new_value) != 1) {
 761                 printk(KERN_ERR DRV_NAME
 762                        ": %s: no down delay value specified.\n",
 763                        bond->dev->name);
 764                 ret = -EINVAL;
 765                 goto out;
 766         }
 767         if (new_value < 0) {
 768                 printk(KERN_ERR DRV_NAME
 769                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 770                        bond->dev->name, new_value, 1, INT_MAX);
 771                 ret = -EINVAL;
 772                 goto out;
 773         } else {
 774                 if ((new_value % bond->params.miimon) != 0) {
 775                         printk(KERN_WARNING DRV_NAME
 776                                ": %s: Warning: down delay (%d) is not a multiple "
 777                                "of miimon (%d), delay rounded to %d ms\n",
 778                                bond->dev->name, new_value, bond->params.miimon,
 779                                (new_value / bond->params.miimon) *
 780                                bond->params.miimon);
 781                 }
 782                 bond->params.downdelay = new_value / bond->params.miimon;
 783                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 784                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 785
 786         }
 787
 788 out:
 789         return ret;
 790 }
 791 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 792
 793 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
 794 {
 795         struct bonding *bond = to_bond(cd);
 796
 797         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 798
 799 }
 800
 801 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
 802 {
 803         int new_value, ret = count;
 804         struct bonding *bond = to_bond(cd);
 805
 806         if (!(bond->params.miimon)) {
 807                 printk(KERN_ERR DRV_NAME
 808                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 809                        bond->dev->name);
 810                 ret = -EPERM;
 811                 goto out;
 812         }
 813
 814         if (sscanf(buf, "%d", &new_value) != 1) {
 815                 printk(KERN_ERR DRV_NAME
 816                        ": %s: no up delay value specified.\n",
 817                        bond->dev->name);
 818                 ret = -EINVAL;
 819                 goto out;
 820         }
 821         if (new_value < 0) {
 822                 printk(KERN_ERR DRV_NAME
 823                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 824                        bond->dev->name, new_value, 1, INT_MAX);
 825                 ret = -EINVAL;
 826                 goto out;
 827         } else {
 828                 if ((new_value % bond->params.miimon) != 0) {
 829                         printk(KERN_WARNING DRV_NAME
 830                                ": %s: Warning: up delay (%d) is not a multiple "
 831                                "of miimon (%d), updelay rounded to %d ms\n",
 832                                bond->dev->name, new_value, bond->params.miimon,
 833                                (new_value / bond->params.miimon) *
 834                                bond->params.miimon);
 835                 }
 836                 bond->params.updelay = new_value / bond->params.miimon;
 837                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 838                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 839
 840         }
 841
 842 out:
 843         return ret;
 844 }
 845 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 846
 847 /*
 848  * Show and set the LACP interval.  Interface must be down, and the mode
 849  * must be set to 802.3ad mode.
 850  */
 851 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
 852 {
 853         struct bonding *bond = to_bond(cd);
 854
 855         return sprintf(buf, "%s %d\n",
 856                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 857                 bond->params.lacp_fast) + 1;
 858 }
 859
 860 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
 861 {
 862         int new_value, ret = count;
 863         struct bonding *bond = to_bond(cd);
 864
 865         if (bond->dev->flags & IFF_UP) {
 866                 printk(KERN_ERR DRV_NAME
 867                        ": %s: Unable to update LACP rate because interface is up.\n",
 868                        bond->dev->name);
 869                 ret = -EPERM;
 870                 goto out;
 871         }
 872
 873         if (bond->params.mode != BOND_MODE_8023AD) {
 874                 printk(KERN_ERR DRV_NAME
 875                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 876                        bond->dev->name);
 877                 ret = -EPERM;
 878                 goto out;
 879         }
 880
 881         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 882
 883         if ((new_value == 1) || (new_value == 0)) {
 884                 bond->params.lacp_fast = new_value;
 885                 printk(KERN_INFO DRV_NAME
 886                        ": %s: Setting LACP rate to %s (%d).\n",
 887                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 888         } else {
 889                 printk(KERN_ERR DRV_NAME
 890                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 891                         bond->dev->name, (int)strlen(buf) - 1, buf);
 892                 ret = -EINVAL;
 893         }
 894 out:
 895         return ret;
 896 }
 897 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 898
 899 /*
 900  * Show and set the MII monitor interval.  There are two tricky bits
 901  * here.  First, if MII monitoring is activated, then we must disable
 902  * ARP monitoring.  Second, if the timer isn't running, we must
 903  * start it.
 904  */
 905 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
 906 {
 907         struct bonding *bond = to_bond(cd);
 908
 909         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 910 }
 911
 912 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
 913 {
 914         int new_value, ret = count;
 915         struct bonding *bond = to_bond(cd);
 916
 917         if (sscanf(buf, "%d", &new_value) != 1) {
 918                 printk(KERN_ERR DRV_NAME
 919                        ": %s: no miimon value specified.\n",
 920                        bond->dev->name);
 921                 ret = -EINVAL;
 922                 goto out;
 923         }
 924         if (new_value < 0) {
 925                 printk(KERN_ERR DRV_NAME
 926                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 927                        bond->dev->name, new_value, 1, INT_MAX);
 928                 ret = -EINVAL;
 929                 goto out;
 930         } else {
 931                 printk(KERN_INFO DRV_NAME
 932                        ": %s: Setting MII monitoring interval to %d.\n",
 933                        bond->dev->name, new_value);
 934                 bond->params.miimon = new_value;
 935                 if(bond->params.updelay)
 936                         printk(KERN_INFO DRV_NAME
 937                               ": %s: Note: Updating updelay (to %d) "
 938                               "since it is a multiple of the miimon value.\n",
 939                               bond->dev->name,
 940                               bond->params.updelay * bond->params.miimon);
 941                 if(bond->params.downdelay)
 942                         printk(KERN_INFO DRV_NAME
 943                               ": %s: Note: Updating downdelay (to %d) "
 944                               "since it is a multiple of the miimon value.\n",
 945                               bond->dev->name,
 946                               bond->params.downdelay * bond->params.miimon);
 947                 if (bond->params.arp_interval) {
 948                         printk(KERN_INFO DRV_NAME
 949                                ": %s: MII monitoring cannot be used with "
 950                                "ARP monitoring. Disabling ARP monitoring...\n",
 951                                bond->dev->name);
 952                         bond->params.arp_interval = 0;
 953                         /* Kill ARP timer, else it brings bond's link down */
 954                         if (bond->mii_timer.function) {
 955                                 printk(KERN_INFO DRV_NAME
 956                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
 957                                bond->dev->name);
 958                                 del_timer_sync(&bond->arp_timer);
 959                         }
 960                 }
 961
 962                 if (bond->dev->flags & IFF_UP) {
 963                         /* If the interface is up, we may need to fire off
 964                          * the MII timer. If the interface is down, the
 965                          * timer will get fired off when the open function
 966                          * is called.
 967                          */
 968                         if (bond->mii_timer.function) {
 969                                 /* The timer's already set up, so fire it off */
 970                                 mod_timer(&bond->mii_timer, jiffies + 1);
 971                         } else {
 972                                 /* Set up the timer. */
 973                                 init_timer(&bond->mii_timer);
 974                                 bond->mii_timer.expires = jiffies + 1;
 975                                 bond->mii_timer.data =
 976                                         (unsigned long) bond->dev;
 977                                 bond->mii_timer.function =
 978                                         (void *) &bond_mii_monitor;
 979                                 add_timer(&bond->mii_timer);
 980                         }
 981                 }
 982         }
 983 out:
 984         return ret;
 985 }
 986 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
 987
 988 /*
 989  * Show and set the primary slave.  The store function is much
 990  * simpler than bonding_store_slaves function because it only needs to
 991  * handle one interface name.
 992  * The bond must be a mode that supports a primary for this be
 993  * set.
 994  */
 995 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
 996 {
 997         int count = 0;
 998         struct bonding *bond = to_bond(cd);
 999
1000         if (bond->primary_slave)
1001                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
1002         else
1003                 count = sprintf(buf, "\n") + 1;
1004
1005         return count;
1006 }
1007
1008 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
1009 {
1010         int i;
1011         struct slave *slave;
1012         struct bonding *bond = to_bond(cd);
1013
1014         write_lock_bh(&bond->lock);
1015         if (!USES_PRIMARY(bond->params.mode)) {
1016                 printk(KERN_INFO DRV_NAME
1017                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1018                        bond->dev->name, bond->dev->name, bond->params.mode);
1019         } else {
1020                 bond_for_each_slave(bond, slave, i) {
1021                         if (strnicmp
1022                             (slave->dev->name, buf,
1023                              strlen(slave->dev->name)) == 0) {
1024                                 printk(KERN_INFO DRV_NAME
1025                                        ": %s: Setting %s as primary slave.\n",
1026                                        bond->dev->name, slave->dev->name);
1027                                 bond->primary_slave = slave;
1028                                 bond_select_active_slave(bond);
1029                                 goto out;
1030                         }
1031                 }
1032
1033                 /* if we got here, then we didn't match the name of any slave */
1034
1035                 if (strlen(buf) == 0 || buf[0] == '\n') {
1036                         printk(KERN_INFO DRV_NAME
1037                                ": %s: Setting primary slave to None.\n",
1038                                bond->dev->name);
1039                         bond->primary_slave = 0;
1040                                 bond_select_active_slave(bond);
1041                 } else {
1042                         printk(KERN_INFO DRV_NAME
1043                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1044                                bond->dev->name, (int)strlen(buf) - 1, buf);
1045                 }
1046         }
1047 out:
1048         write_unlock_bh(&bond->lock);
1049         return count;
1050 }
1051 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1052
1053 /*
1054  * Show and set the use_carrier flag.
1055  */
1056 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1057 {
1058         struct bonding *bond = to_bond(cd);
1059
1060         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1061 }
1062
1063 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1064 {
1065         int new_value, ret = count;
1066         struct bonding *bond = to_bond(cd);
1067
1068
1069         if (sscanf(buf, "%d", &new_value) != 1) {
1070                 printk(KERN_ERR DRV_NAME
1071                        ": %s: no use_carrier value specified.\n",
1072                        bond->dev->name);
1073                 ret = -EINVAL;
1074                 goto out;
1075         }
1076         if ((new_value == 0) || (new_value == 1)) {
1077                 bond->params.use_carrier = new_value;
1078                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1079                        bond->dev->name, new_value);
1080         } else {
1081                 printk(KERN_INFO DRV_NAME
1082                        ": %s: Ignoring invalid use_carrier value %d.\n",
1083                        bond->dev->name, new_value);
1084         }
1085 out:
1086         return count;
1087 }
1088 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1089
1090
1091 /*
1092  * Show and set currently active_slave.
1093  */
1094 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1095 {
1096         struct slave *curr;
1097         struct bonding *bond = to_bond(cd);
1098         int count;
1099
1100
1101         read_lock(&bond->curr_slave_lock);
1102         curr = bond->curr_active_slave;
1103         read_unlock(&bond->curr_slave_lock);
1104
1105         if (USES_PRIMARY(bond->params.mode) && curr)
1106                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1107         else
1108                 count = sprintf(buf, "\n") + 1;
1109         return count;
1110 }
1111
1112 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1113 {
1114         int i;
1115         struct slave *slave;
1116         struct slave *old_active = NULL;
1117         struct slave *new_active = NULL;
1118         struct bonding *bond = to_bond(cd);
1119
1120         write_lock_bh(&bond->lock);
1121         if (!USES_PRIMARY(bond->params.mode)) {
1122                 printk(KERN_INFO DRV_NAME
1123                        ": %s: Unable to change active slave; %s is in mode %d\n",
1124                        bond->dev->name, bond->dev->name, bond->params.mode);
1125         } else {
1126                 bond_for_each_slave(bond, slave, i) {
1127                         if (strnicmp
1128                             (slave->dev->name, buf,
1129                              strlen(slave->dev->name)) == 0) {
1130                                 old_active = bond->curr_active_slave;
1131                                 new_active = slave;
1132                                 if (new_active && (new_active == old_active)) {
1133                                         /* do nothing */
1134                                         printk(KERN_INFO DRV_NAME
1135                                                ": %s: %s is already the current active slave.\n",
1136                                                bond->dev->name, slave->dev->name);
1137                                         goto out;
1138                                 }
1139                                 else {
1140                                         if ((new_active) &&
1141                                             (old_active) &&
1142                                             (new_active->link == BOND_LINK_UP) &&
1143                                             IS_UP(new_active->dev)) {
1144                                                 printk(KERN_INFO DRV_NAME
1145                                                       ": %s: Setting %s as active slave.\n",
1146                                                       bond->dev->name, slave->dev->name);
1147                                                 bond_change_active_slave(bond, new_active);
1148                                         }
1149                                         else {
1150                                                 printk(KERN_INFO DRV_NAME
1151                                                       ": %s: Could not set %s as active slave; "
1152                                                       "either %s is down or the link is down.\n",
1153                                                       bond->dev->name, slave->dev->name,
1154                                                       slave->dev->name);
1155                                         }
1156                                         goto out;
1157                                 }
1158                         }
1159                 }
1160
1161                 /* if we got here, then we didn't match the name of any slave */
1162
1163                 if (strlen(buf) == 0 || buf[0] == '\n') {
1164                         printk(KERN_INFO DRV_NAME
1165                                ": %s: Setting active slave to None.\n",
1166                                bond->dev->name);
1167                         bond->primary_slave = 0;
1168                                 bond_select_active_slave(bond);
1169                 } else {
1170                         printk(KERN_INFO DRV_NAME
1171                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1172                                bond->dev->name, (int)strlen(buf) - 1, buf);
1173                 }
1174         }
1175 out:
1176         write_unlock_bh(&bond->lock);
1177         return count;
1178
1179 }
1180 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1181
1182
1183 /*
1184  * Show link status of the bond interface.
1185  */
1186 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1187 {
1188         struct slave *curr;
1189         struct bonding *bond = to_bond(cd);
1190
1191         read_lock(&bond->curr_slave_lock);
1192         curr = bond->curr_active_slave;
1193         read_unlock(&bond->curr_slave_lock);
1194
1195         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1196 }
1197 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1198
1199
1200 /*
1201  * Show current 802.3ad aggregator ID.
1202  */
1203 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1204 {
1205         int count = 0;
1206         struct bonding *bond = to_bond(cd);
1207
1208         if (bond->params.mode == BOND_MODE_8023AD) {
1209                 struct ad_info ad_info;
1210                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1211         }
1212         else
1213                 count = sprintf(buf, "\n") + 1;
1214
1215         return count;
1216 }
1217 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1218
1219
1220 /*
1221  * Show number of active 802.3ad ports.
1222  */
1223 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1224 {
1225         int count = 0;
1226         struct bonding *bond = to_bond(cd);
1227
1228         if (bond->params.mode == BOND_MODE_8023AD) {
1229                 struct ad_info ad_info;
1230                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1231         }
1232         else
1233                 count = sprintf(buf, "\n") + 1;
1234
1235         return count;
1236 }
1237 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1238
1239
1240 /*
1241  * Show current 802.3ad actor key.
1242  */
1243 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1244 {
1245         int count = 0;
1246         struct bonding *bond = to_bond(cd);
1247
1248         if (bond->params.mode == BOND_MODE_8023AD) {
1249                 struct ad_info ad_info;
1250                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1251         }
1252         else
1253                 count = sprintf(buf, "\n") + 1;
1254
1255         return count;
1256 }
1257 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1258
1259
1260 /*
1261  * Show current 802.3ad partner key.
1262  */
1263 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1264 {
1265         int count = 0;
1266         struct bonding *bond = to_bond(cd);
1267
1268         if (bond->params.mode == BOND_MODE_8023AD) {
1269                 struct ad_info ad_info;
1270                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1271         }
1272         else
1273                 count = sprintf(buf, "\n") + 1;
1274
1275         return count;
1276 }
1277 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1278
1279
1280 /*
1281  * Show current 802.3ad partner mac.
1282  */
1283 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1284 {
1285         int count = 0;
1286         struct bonding *bond = to_bond(cd);
1287
1288         if (bond->params.mode == BOND_MODE_8023AD) {
1289                 struct ad_info ad_info;
1290                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1291                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1292                                        ad_info.partner_system[0],
1293                                        ad_info.partner_system[1],
1294                                        ad_info.partner_system[2],
1295                                        ad_info.partner_system[3],
1296                                        ad_info.partner_system[4],
1297                                        ad_info.partner_system[5]) + 1;
1298                 }
1299         }
1300         else
1301                 count = sprintf(buf, "\n") + 1;
1302
1303         return count;
1304 }
1305 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1306
1307
1308
1309 static struct attribute *per_bond_attrs[] = {
1310         &class_device_attr_slaves.attr,
1311         &class_device_attr_mode.attr,
1312         &class_device_attr_arp_interval.attr,
1313         &class_device_attr_arp_ip_target.attr,
1314         &class_device_attr_downdelay.attr,
1315         &class_device_attr_updelay.attr,
1316         &class_device_attr_lacp_rate.attr,
1317         &class_device_attr_xmit_hash_policy.attr,
1318         &class_device_attr_miimon.attr,
1319         &class_device_attr_primary.attr,
1320         &class_device_attr_use_carrier.attr,
1321         &class_device_attr_active_slave.attr,
1322         &class_device_attr_mii_status.attr,
1323         &class_device_attr_ad_aggregator.attr,
1324         &class_device_attr_ad_num_ports.attr,
1325         &class_device_attr_ad_actor_key.attr,
1326         &class_device_attr_ad_partner_key.attr,
1327         &class_device_attr_ad_partner_mac.attr,
1328         NULL,
1329 };
1330
1331 static struct attribute_group bonding_group = {
1332         .name = "bonding",
1333         .attrs = per_bond_attrs,
1334 };
1335
1336 /*
1337  * Initialize sysfs.  This sets up the bonding_masters file in
1338  * /sys/class/net.
1339  */
1340 int bond_create_sysfs(void)
1341 {
1342         int ret = 0;
1343         struct bonding *firstbond;
1344
1345         init_rwsem(&bonding_rwsem);
1346
1347         /* get the netdev class pointer */
1348         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1349         if (!firstbond)
1350                 return -ENODEV;
1351
1352         netdev_class = firstbond->dev->class_dev.class;
1353         if (!netdev_class)
1354                 return -ENODEV;
1355
1356         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1357
1358         return ret;
1359
1360 }
1361
1362 /*
1363  * Remove /sys/class/net/bonding_masters.
1364  */
1365 void bond_destroy_sysfs(void)
1366 {
1367         if (netdev_class)
1368                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1369 }
1370
1371 /*
1372  * Initialize sysfs for each bond.  This sets up and registers
1373  * the 'bondctl' directory for each individual bond under /sys/class/net.
1374  */
1375 int bond_create_sysfs_entry(struct bonding *bond)
1376 {
1377         struct net_device *dev = bond->dev;
1378         int err;
1379
1380         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1381         if (err) {
1382                 printk(KERN_EMERG "eek! didn't create group!\n");
1383         }
1384
1385         if (expected_refcount < 1)
1386                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1387
1388         return err;
1389 }
1390 /*
1391  * Remove sysfs entries for each bond.
1392  */
1393 void bond_destroy_sysfs_entry(struct bonding *bond)
1394 {
1395         struct net_device *dev = bond->dev;
1396
1397         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1398 }
1399