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/sched.h>
  26 #include <linux/device.h>
  27 #include <linux/sysdev.h>
  28 #include <linux/fs.h>
  29 #include <linux/types.h>
  30 #include <linux/string.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/inetdevice.h>
  33 #include <linux/in.h>
  34 #include <linux/sysfs.h>
  35 #include <linux/string.h>
  36 #include <linux/ctype.h>
  37 #include <linux/inet.h>
  38 #include <linux/rtnetlink.h>
  39
  40 /* #define BONDING_DEBUG 1 */
  41 #include "bonding.h"
  42 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
  43 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
  44 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  45
  46 /*---------------------------- Declarations -------------------------------*/
  47
  48
  49 extern struct list_head bond_dev_list;
  50 extern struct bond_params bonding_defaults;
  51 extern struct bond_parm_tbl bond_mode_tbl[];
  52 extern struct bond_parm_tbl bond_lacp_tbl[];
  53 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  54 extern struct bond_parm_tbl arp_validate_tbl[];
  55
  56 static int expected_refcount = -1;
  57 static struct class *netdev_class;
  58 /*--------------------------- Data Structures -----------------------------*/
  59
  60 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
  61  * Because kobject_register tries to acquire the subsystem lock.  If
  62  * we already hold the lock (which we would if the user was creating
  63  * a new bond through the sysfs interface), we deadlock.
  64  * This lock is only needed when deleting a bond - we need to make sure
  65  * that we don't collide with an ongoing ioctl.
  66  */
  67
  68 struct rw_semaphore bonding_rwsem;
  69
  70
  71
  72
  73 /*------------------------------ Functions --------------------------------*/
  74
  75 /*
  76  * "show" function for the bond_masters attribute.
  77  * The class parameter is ignored.
  78  */
  79 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
  80 {
  81         int res = 0;
  82         struct bonding *bond;
  83
  84         down_read(&(bonding_rwsem));
  85
  86         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  87                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  88                         /* not enough space for another interface name */
  89                         if ((PAGE_SIZE - res) > 10)
  90                                 res = PAGE_SIZE - 10;
  91                         res += sprintf(buffer + res, "++more++");
  92                         break;
  93                 }
  94                 res += sprintf(buffer + res, "%s ",
  95                                bond->dev->name);
  96         }
  97         res += sprintf(buffer + res, "\n");
  98         res++;
  99         up_read(&(bonding_rwsem));
 100         return res;
 101 }
 102
 103 /*
 104  * "store" function for the bond_masters attribute.  This is what
 105  * creates and deletes entire bonds.
 106  *
 107  * The class parameter is ignored.
 108  *
 109  */
 110
 111 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 112 {
 113         char command[IFNAMSIZ + 1] = {0, };
 114         char *ifname;
 115         int res = count;
 116         struct bonding *bond;
 117         struct bonding *nxt;
 118
 119         down_write(&(bonding_rwsem));
 120         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 121         ifname = command + 1;
 122         if ((strlen(command) <= 1) ||
 123             !dev_valid_name(ifname))
 124                 goto err_no_cmd;
 125
 126         if (command[0] == '+') {
 127
 128                 /* Check to see if the bond already exists. */
 129                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 130                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 131                                 printk(KERN_ERR DRV_NAME
 132                                         ": cannot add bond %s; it already exists\n",
 133                                         ifname);
 134                                 res = -EPERM;
 135                                 goto out;
 136                         }
 137
 138                 printk(KERN_INFO DRV_NAME
 139                         ": %s is being created...\n", ifname);
 140                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 141                         printk(KERN_INFO DRV_NAME
 142                         ": %s interface already exists. Bond creation failed.\n",
 143                         ifname);
 144                         res = -EPERM;
 145                 }
 146                 goto out;
 147         }
 148
 149         if (command[0] == '-') {
 150                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 151                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 152                                 rtnl_lock();
 153                                 /* check the ref count on the bond's kobject.
 154                                  * If it's > expected, then there's a file open,
 155                                  * and we have to fail.
 156                                  */
 157                                 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
 158                                                         > expected_refcount){
 159                                         rtnl_unlock();
 160                                         printk(KERN_INFO DRV_NAME
 161                                                 ": Unable remove bond %s due to open references.\n",
 162                                                 ifname);
 163                                         res = -EPERM;
 164                                         goto out;
 165                                 }
 166                                 printk(KERN_INFO DRV_NAME
 167                                         ": %s is being deleted...\n",
 168                                         bond->dev->name);
 169                                 unregister_netdevice(bond->dev);
 170                                 bond_deinit(bond->dev);
 171                                 bond_destroy_sysfs_entry(bond);
 172                                 rtnl_unlock();
 173                                 goto out;
 174                         }
 175
 176                 printk(KERN_ERR DRV_NAME
 177                         ": unable to delete non-existent bond %s\n", ifname);
 178                 res = -ENODEV;
 179                 goto out;
 180         }
 181
 182 err_no_cmd:
 183         printk(KERN_ERR DRV_NAME
 184                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 185         res = -EPERM;
 186
 187         /* Always return either count or an error.  If you return 0, you'll
 188          * get called forever, which is bad.
 189          */
 190 out:
 191         up_write(&(bonding_rwsem));
 192         return res;
 193 }
 194 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 195 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 196                   bonding_show_bonds, bonding_store_bonds);
 197
 198 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 199 {
 200         char linkname[IFNAMSIZ+7];
 201         int ret = 0;
 202
 203         /* first, create a link from the slave back to the master */
 204         ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
 205                                 "master");
 206         if (ret)
 207                 return ret;
 208         /* next, create a link from the master to the slave */
 209         sprintf(linkname,"slave_%s",slave->name);
 210         ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
 211                                 linkname);
 212         return ret;
 213
 214 }
 215
 216 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 217 {
 218         char linkname[IFNAMSIZ+7];
 219
 220         sysfs_remove_link(&(slave->class_dev.kobj), "master");
 221         sprintf(linkname,"slave_%s",slave->name);
 222         sysfs_remove_link(&(master->class_dev.kobj), linkname);
 223 }
 224
 225
 226 /*
 227  * Show the slaves in the current bond.
 228  */
 229 static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
 230 {
 231         struct slave *slave;
 232         int i, res = 0;
 233         struct bonding *bond = to_bond(cd);
 234
 235         read_lock_bh(&bond->lock);
 236         bond_for_each_slave(bond, slave, i) {
 237                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 238                         /* not enough space for another interface name */
 239                         if ((PAGE_SIZE - res) > 10)
 240                                 res = PAGE_SIZE - 10;
 241                         res += sprintf(buf + res, "++more++");
 242                         break;
 243                 }
 244                 res += sprintf(buf + res, "%s ", slave->dev->name);
 245         }
 246         read_unlock_bh(&bond->lock);
 247         res += sprintf(buf + res, "\n");
 248         res++;
 249         return res;
 250 }
 251
 252 /*
 253  * Set the slaves in the current bond.  The bond interface must be
 254  * up for this to succeed.
 255  * This function is largely the same flow as bonding_update_bonds().
 256  */
 257 static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
 258 {
 259         char command[IFNAMSIZ + 1] = { 0, };
 260         char *ifname;
 261         int i, res, found, ret = count;
 262         struct slave *slave;
 263         struct net_device *dev = NULL;
 264         struct bonding *bond = to_bond(cd);
 265
 266         /* Quick sanity check -- is the bond interface up? */
 267         if (!(bond->dev->flags & IFF_UP)) {
 268                 printk(KERN_ERR DRV_NAME
 269                        ": %s: Unable to update slaves because interface is down.\n",
 270                        bond->dev->name);
 271                 ret = -EPERM;
 272                 goto out;
 273         }
 274
 275         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 276
 277         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 278         ifname = command + 1;
 279         if ((strlen(command) <= 1) ||
 280             !dev_valid_name(ifname))
 281                 goto err_no_cmd;
 282
 283         if (command[0] == '+') {
 284
 285                 /* Got a slave name in ifname.  Is it already in the list? */
 286                 found = 0;
 287                 read_lock_bh(&bond->lock);
 288                 bond_for_each_slave(bond, slave, i)
 289                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 290                                 printk(KERN_ERR DRV_NAME
 291                                        ": %s: Interface %s is already enslaved!\n",
 292                                        bond->dev->name, ifname);
 293                                 ret = -EPERM;
 294                                 read_unlock_bh(&bond->lock);
 295                                 goto out;
 296                         }
 297
 298                 read_unlock_bh(&bond->lock);
 299                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 300                        bond->dev->name, ifname);
 301                 dev = dev_get_by_name(ifname);
 302                 if (!dev) {
 303                         printk(KERN_INFO DRV_NAME
 304                                ": %s: Interface %s does not exist!\n",
 305                                bond->dev->name, ifname);
 306                         ret = -EPERM;
 307                         goto out;
 308                 }
 309                 else
 310                         dev_put(dev);
 311
 312                 if (dev->flags & IFF_UP) {
 313                         printk(KERN_ERR DRV_NAME
 314                                ": %s: Error: Unable to enslave %s "
 315                                "because it is already up.\n",
 316                                bond->dev->name, dev->name);
 317                         ret = -EPERM;
 318                         goto out;
 319                 }
 320                 /* If this is the first slave, then we need to set
 321                    the master's hardware address to be the same as the
 322                    slave's. */
 323                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 324                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 325                                dev->addr_len);
 326                 }
 327
 328                 /* Set the slave's MTU to match the bond */
 329                 if (dev->mtu != bond->dev->mtu) {
 330                         if (dev->change_mtu) {
 331                                 res = dev->change_mtu(dev,
 332                                                       bond->dev->mtu);
 333                                 if (res) {
 334                                         ret = res;
 335                                         goto out;
 336                                 }
 337                         } else {
 338                                 dev->mtu = bond->dev->mtu;
 339                         }
 340                 }
 341                 rtnl_lock();
 342                 res = bond_enslave(bond->dev, dev);
 343                 rtnl_unlock();
 344                 if (res) {
 345                         ret = res;
 346                 }
 347                 goto out;
 348         }
 349
 350         if (command[0] == '-') {
 351                 dev = NULL;
 352                 bond_for_each_slave(bond, slave, i)
 353                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 354                                 dev = slave->dev;
 355                                 break;
 356                         }
 357                 if (dev) {
 358                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 359                                 bond->dev->name, dev->name);
 360                         rtnl_lock();
 361                         res = bond_release(bond->dev, dev);
 362                         rtnl_unlock();
 363                         if (res) {
 364                                 ret = res;
 365                                 goto out;
 366                         }
 367                         /* set the slave MTU to the default */
 368                         if (dev->change_mtu) {
 369                                 dev->change_mtu(dev, 1500);
 370                         } else {
 371                                 dev->mtu = 1500;
 372                         }
 373                 }
 374                 else {
 375                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 376                                 ifname, bond->dev->name);
 377                         ret = -ENODEV;
 378                 }
 379                 goto out;
 380         }
 381
 382 err_no_cmd:
 383         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 384         ret = -EPERM;
 385
 386 out:
 387         return ret;
 388 }
 389
 390 static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 391
 392 /*
 393  * Show and set the bonding mode.  The bond interface must be down to
 394  * change the mode.
 395  */
 396 static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
 397 {
 398         struct bonding *bond = to_bond(cd);
 399
 400         return sprintf(buf, "%s %d\n",
 401                         bond_mode_tbl[bond->params.mode].modename,
 402                         bond->params.mode) + 1;
 403 }
 404
 405 static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
 406 {
 407         int new_value, ret = count;
 408         struct bonding *bond = to_bond(cd);
 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((char *)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 CLASS_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 class_device *cd, char *buf)
 448 {
 449         int count;
 450         struct bonding *bond = to_bond(cd);
 451
 452         if ((bond->params.mode != BOND_MODE_XOR) &&
 453             (bond->params.mode != BOND_MODE_8023AD)) {
 454                 // Not Applicable
 455                 count = sprintf(buf, "NA\n") + 1;
 456         } else {
 457                 count = sprintf(buf, "%s %d\n",
 458                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 459                         bond->params.xmit_policy) + 1;
 460         }
 461
 462         return count;
 463 }
 464
 465 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
 466 {
 467         int new_value, ret = count;
 468         struct bonding *bond = to_bond(cd);
 469
 470         if (bond->dev->flags & IFF_UP) {
 471                 printk(KERN_ERR DRV_NAME
 472                        "%s: Interface is up. Unable to update xmit policy.\n",
 473                        bond->dev->name);
 474                 ret = -EPERM;
 475                 goto out;
 476         }
 477
 478         if ((bond->params.mode != BOND_MODE_XOR) &&
 479             (bond->params.mode != BOND_MODE_8023AD)) {
 480                 printk(KERN_ERR DRV_NAME
 481                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 482                        bond->dev->name);
 483                 ret = -EPERM;
 484                 goto out;
 485         }
 486
 487         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 488         if (new_value < 0)  {
 489                 printk(KERN_ERR DRV_NAME
 490                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 491                        bond->dev->name,
 492                        (int)strlen(buf) - 1, buf);
 493                 ret = -EINVAL;
 494                 goto out;
 495         } else {
 496                 bond->params.xmit_policy = new_value;
 497                 bond_set_mode_ops(bond, bond->params.mode);
 498                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 499                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 500         }
 501 out:
 502         return ret;
 503 }
 504 static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 505
 506 /*
 507  * Show and set arp_validate.
 508  */
 509 static ssize_t bonding_show_arp_validate(struct class_device *cd, char *buf)
 510 {
 511         struct bonding *bond = to_bond(cd);
 512
 513         return sprintf(buf, "%s %d\n",
 514                        arp_validate_tbl[bond->params.arp_validate].modename,
 515                        bond->params.arp_validate) + 1;
 516 }
 517
 518 static ssize_t bonding_store_arp_validate(struct class_device *cd, const char *buf, size_t count)
 519 {
 520         int new_value;
 521         struct bonding *bond = to_bond(cd);
 522
 523         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
 524         if (new_value < 0) {
 525                 printk(KERN_ERR DRV_NAME
 526                        ": %s: Ignoring invalid arp_validate value %s\n",
 527                        bond->dev->name, buf);
 528                 return -EINVAL;
 529         }
 530         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 531                 printk(KERN_ERR DRV_NAME
 532                        ": %s: arp_validate only supported in active-backup mode.\n",
 533                        bond->dev->name);
 534                 return -EINVAL;
 535         }
 536         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 537                bond->dev->name, arp_validate_tbl[new_value].modename,
 538                new_value);
 539
 540         if (!bond->params.arp_validate && new_value) {
 541                 bond_register_arp(bond);
 542         } else if (bond->params.arp_validate && !new_value) {
 543                 bond_unregister_arp(bond);
 544         }
 545
 546         bond->params.arp_validate = new_value;
 547
 548         return count;
 549 }
 550
 551 static CLASS_DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 552
 553 /*
 554  * Show and set the arp timer interval.  There are two tricky bits
 555  * here.  First, if ARP monitoring is activated, then we must disable
 556  * MII monitoring.  Second, if the ARP timer isn't running, we must
 557  * start it.
 558  */
 559 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
 560 {
 561         struct bonding *bond = to_bond(cd);
 562
 563         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 564 }
 565
 566 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
 567 {
 568         int new_value, ret = count;
 569         struct bonding *bond = to_bond(cd);
 570
 571         if (sscanf(buf, "%d", &new_value) != 1) {
 572                 printk(KERN_ERR DRV_NAME
 573                        ": %s: no arp_interval value specified.\n",
 574                        bond->dev->name);
 575                 ret = -EINVAL;
 576                 goto out;
 577         }
 578         if (new_value < 0) {
 579                 printk(KERN_ERR DRV_NAME
 580                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 581                        bond->dev->name, new_value, INT_MAX);
 582                 ret = -EINVAL;
 583                 goto out;
 584         }
 585
 586         printk(KERN_INFO DRV_NAME
 587                ": %s: Setting ARP monitoring interval to %d.\n",
 588                bond->dev->name, new_value);
 589         bond->params.arp_interval = new_value;
 590         if (bond->params.miimon) {
 591                 printk(KERN_INFO DRV_NAME
 592                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 593                        "%s Disabling MII monitoring.\n",
 594                        bond->dev->name, bond->dev->name);
 595                 bond->params.miimon = 0;
 596                 /* Kill MII timer, else it brings bond's link down */
 597                 if (bond->arp_timer.function) {
 598                         printk(KERN_INFO DRV_NAME
 599                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 600                        bond->dev->name);
 601                         del_timer_sync(&bond->mii_timer);
 602                 }
 603         }
 604         if (!bond->params.arp_targets[0]) {
 605                 printk(KERN_INFO DRV_NAME
 606                        ": %s: ARP monitoring has been set up, "
 607                        "but no ARP targets have been specified.\n",
 608                        bond->dev->name);
 609         }
 610         if (bond->dev->flags & IFF_UP) {
 611                 /* If the interface is up, we may need to fire off
 612                  * the ARP timer.  If the interface is down, the
 613                  * timer will get fired off when the open function
 614                  * is called.
 615                  */
 616                 if (bond->arp_timer.function) {
 617                         /* The timer's already set up, so fire it off */
 618                         mod_timer(&bond->arp_timer, jiffies + 1);
 619                 } else {
 620                         /* Set up the timer. */
 621                         init_timer(&bond->arp_timer);
 622                         bond->arp_timer.expires = jiffies + 1;
 623                         bond->arp_timer.data =
 624                                 (unsigned long) bond->dev;
 625                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 626                                 bond->arp_timer.function =
 627                                         (void *)
 628                                         &bond_activebackup_arp_mon;
 629                         } else {
 630                                 bond->arp_timer.function =
 631                                         (void *)
 632                                         &bond_loadbalance_arp_mon;
 633                         }
 634                         add_timer(&bond->arp_timer);
 635                 }
 636         }
 637
 638 out:
 639         return ret;
 640 }
 641 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 642
 643 /*
 644  * Show and set the arp targets.
 645  */
 646 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
 647 {
 648         int i, res = 0;
 649         struct bonding *bond = to_bond(cd);
 650
 651         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 652                 if (bond->params.arp_targets[i])
 653                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 654                                NIPQUAD(bond->params.arp_targets[i]));
 655         }
 656         if (res)
 657                 res--;  /* eat the leftover space */
 658         res += sprintf(buf + res, "\n");
 659         res++;
 660         return res;
 661 }
 662
 663 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
 664 {
 665         u32 newtarget;
 666         int i = 0, done = 0, ret = count;
 667         struct bonding *bond = to_bond(cd);
 668         u32 *targets;
 669
 670         targets = bond->params.arp_targets;
 671         newtarget = in_aton(buf + 1);
 672         /* look for adds */
 673         if (buf[0] == '+') {
 674                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 675                         printk(KERN_ERR DRV_NAME
 676                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 677                                bond->dev->name, NIPQUAD(newtarget));
 678                         ret = -EINVAL;
 679                         goto out;
 680                 }
 681                 /* look for an empty slot to put the target in, and check for dupes */
 682                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 683                         if (targets[i] == newtarget) { /* duplicate */
 684                                 printk(KERN_ERR DRV_NAME
 685                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 686                                        bond->dev->name, NIPQUAD(newtarget));
 687                                 if (done)
 688                                         targets[i] = 0;
 689                                 ret = -EINVAL;
 690                                 goto out;
 691                         }
 692                         if (targets[i] == 0 && !done) {
 693                                 printk(KERN_INFO DRV_NAME
 694                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 695                                        bond->dev->name, NIPQUAD(newtarget));
 696                                 done = 1;
 697                                 targets[i] = newtarget;
 698                         }
 699                 }
 700                 if (!done) {
 701                         printk(KERN_ERR DRV_NAME
 702                                ": %s: ARP target table is full!\n",
 703                                bond->dev->name);
 704                         ret = -EINVAL;
 705                         goto out;
 706                 }
 707
 708         }
 709         else if (buf[0] == '-') {
 710                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 711                         printk(KERN_ERR DRV_NAME
 712                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 713                                bond->dev->name, NIPQUAD(newtarget));
 714                         ret = -EINVAL;
 715                         goto out;
 716                 }
 717
 718                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 719                         if (targets[i] == newtarget) {
 720                                 printk(KERN_INFO DRV_NAME
 721                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 722                                        bond->dev->name, NIPQUAD(newtarget));
 723                                 targets[i] = 0;
 724                                 done = 1;
 725                         }
 726                 }
 727                 if (!done) {
 728                         printk(KERN_INFO DRV_NAME
 729                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 730                                bond->dev->name, NIPQUAD(newtarget));
 731                         ret = -EINVAL;
 732                         goto out;
 733                 }
 734         }
 735         else {
 736                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 737                         bond->dev->name);
 738                 ret = -EPERM;
 739                 goto out;
 740         }
 741
 742 out:
 743         return ret;
 744 }
 745 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 746
 747 /*
 748  * Show and set the up and down delays.  These must be multiples of the
 749  * MII monitoring value, and are stored internally as the multiplier.
 750  * Thus, we must translate to MS for the real world.
 751  */
 752 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
 753 {
 754         struct bonding *bond = to_bond(cd);
 755
 756         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 757 }
 758
 759 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
 760 {
 761         int new_value, ret = count;
 762         struct bonding *bond = to_bond(cd);
 763
 764         if (!(bond->params.miimon)) {
 765                 printk(KERN_ERR DRV_NAME
 766                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 767                        bond->dev->name);
 768                 ret = -EPERM;
 769                 goto out;
 770         }
 771
 772         if (sscanf(buf, "%d", &new_value) != 1) {
 773                 printk(KERN_ERR DRV_NAME
 774                        ": %s: no down delay value specified.\n",
 775                        bond->dev->name);
 776                 ret = -EINVAL;
 777                 goto out;
 778         }
 779         if (new_value < 0) {
 780                 printk(KERN_ERR DRV_NAME
 781                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 782                        bond->dev->name, new_value, 1, INT_MAX);
 783                 ret = -EINVAL;
 784                 goto out;
 785         } else {
 786                 if ((new_value % bond->params.miimon) != 0) {
 787                         printk(KERN_WARNING DRV_NAME
 788                                ": %s: Warning: down delay (%d) is not a multiple "
 789                                "of miimon (%d), delay rounded to %d ms\n",
 790                                bond->dev->name, new_value, bond->params.miimon,
 791                                (new_value / bond->params.miimon) *
 792                                bond->params.miimon);
 793                 }
 794                 bond->params.downdelay = new_value / bond->params.miimon;
 795                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 796                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 797
 798         }
 799
 800 out:
 801         return ret;
 802 }
 803 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 804
 805 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
 806 {
 807         struct bonding *bond = to_bond(cd);
 808
 809         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 810
 811 }
 812
 813 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
 814 {
 815         int new_value, ret = count;
 816         struct bonding *bond = to_bond(cd);
 817
 818         if (!(bond->params.miimon)) {
 819                 printk(KERN_ERR DRV_NAME
 820                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 821                        bond->dev->name);
 822                 ret = -EPERM;
 823                 goto out;
 824         }
 825
 826         if (sscanf(buf, "%d", &new_value) != 1) {
 827                 printk(KERN_ERR DRV_NAME
 828                        ": %s: no up delay value specified.\n",
 829                        bond->dev->name);
 830                 ret = -EINVAL;
 831                 goto out;
 832         }
 833         if (new_value < 0) {
 834                 printk(KERN_ERR DRV_NAME
 835                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 836                        bond->dev->name, new_value, 1, INT_MAX);
 837                 ret = -EINVAL;
 838                 goto out;
 839         } else {
 840                 if ((new_value % bond->params.miimon) != 0) {
 841                         printk(KERN_WARNING DRV_NAME
 842                                ": %s: Warning: up delay (%d) is not a multiple "
 843                                "of miimon (%d), updelay rounded to %d ms\n",
 844                                bond->dev->name, new_value, bond->params.miimon,
 845                                (new_value / bond->params.miimon) *
 846                                bond->params.miimon);
 847                 }
 848                 bond->params.updelay = new_value / bond->params.miimon;
 849                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 850                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 851
 852         }
 853
 854 out:
 855         return ret;
 856 }
 857 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 858
 859 /*
 860  * Show and set the LACP interval.  Interface must be down, and the mode
 861  * must be set to 802.3ad mode.
 862  */
 863 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
 864 {
 865         struct bonding *bond = to_bond(cd);
 866
 867         return sprintf(buf, "%s %d\n",
 868                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 869                 bond->params.lacp_fast) + 1;
 870 }
 871
 872 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
 873 {
 874         int new_value, ret = count;
 875         struct bonding *bond = to_bond(cd);
 876
 877         if (bond->dev->flags & IFF_UP) {
 878                 printk(KERN_ERR DRV_NAME
 879                        ": %s: Unable to update LACP rate because interface is up.\n",
 880                        bond->dev->name);
 881                 ret = -EPERM;
 882                 goto out;
 883         }
 884
 885         if (bond->params.mode != BOND_MODE_8023AD) {
 886                 printk(KERN_ERR DRV_NAME
 887                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 888                        bond->dev->name);
 889                 ret = -EPERM;
 890                 goto out;
 891         }
 892
 893         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 894
 895         if ((new_value == 1) || (new_value == 0)) {
 896                 bond->params.lacp_fast = new_value;
 897                 printk(KERN_INFO DRV_NAME
 898                        ": %s: Setting LACP rate to %s (%d).\n",
 899                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 900         } else {
 901                 printk(KERN_ERR DRV_NAME
 902                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 903                         bond->dev->name, (int)strlen(buf) - 1, buf);
 904                 ret = -EINVAL;
 905         }
 906 out:
 907         return ret;
 908 }
 909 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 910
 911 /*
 912  * Show and set the MII monitor interval.  There are two tricky bits
 913  * here.  First, if MII monitoring is activated, then we must disable
 914  * ARP monitoring.  Second, if the timer isn't running, we must
 915  * start it.
 916  */
 917 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
 918 {
 919         struct bonding *bond = to_bond(cd);
 920
 921         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 922 }
 923
 924 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
 925 {
 926         int new_value, ret = count;
 927         struct bonding *bond = to_bond(cd);
 928
 929         if (sscanf(buf, "%d", &new_value) != 1) {
 930                 printk(KERN_ERR DRV_NAME
 931                        ": %s: no miimon value specified.\n",
 932                        bond->dev->name);
 933                 ret = -EINVAL;
 934                 goto out;
 935         }
 936         if (new_value < 0) {
 937                 printk(KERN_ERR DRV_NAME
 938                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 939                        bond->dev->name, new_value, 1, INT_MAX);
 940                 ret = -EINVAL;
 941                 goto out;
 942         } else {
 943                 printk(KERN_INFO DRV_NAME
 944                        ": %s: Setting MII monitoring interval to %d.\n",
 945                        bond->dev->name, new_value);
 946                 bond->params.miimon = new_value;
 947                 if(bond->params.updelay)
 948                         printk(KERN_INFO DRV_NAME
 949                               ": %s: Note: Updating updelay (to %d) "
 950                               "since it is a multiple of the miimon value.\n",
 951                               bond->dev->name,
 952                               bond->params.updelay * bond->params.miimon);
 953                 if(bond->params.downdelay)
 954                         printk(KERN_INFO DRV_NAME
 955                               ": %s: Note: Updating downdelay (to %d) "
 956                               "since it is a multiple of the miimon value.\n",
 957                               bond->dev->name,
 958                               bond->params.downdelay * bond->params.miimon);
 959                 if (bond->params.arp_interval) {
 960                         printk(KERN_INFO DRV_NAME
 961                                ": %s: MII monitoring cannot be used with "
 962                                "ARP monitoring. Disabling ARP monitoring...\n",
 963                                bond->dev->name);
 964                         bond->params.arp_interval = 0;
 965                         if (bond->params.arp_validate) {
 966                                 bond_unregister_arp(bond);
 967                                 bond->params.arp_validate =
 968                                         BOND_ARP_VALIDATE_NONE;
 969                         }
 970                         /* Kill ARP timer, else it brings bond's link down */
 971                         if (bond->mii_timer.function) {
 972                                 printk(KERN_INFO DRV_NAME
 973                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
 974                                bond->dev->name);
 975                                 del_timer_sync(&bond->arp_timer);
 976                         }
 977                 }
 978
 979                 if (bond->dev->flags & IFF_UP) {
 980                         /* If the interface is up, we may need to fire off
 981                          * the MII timer. If the interface is down, the
 982                          * timer will get fired off when the open function
 983                          * is called.
 984                          */
 985                         if (bond->mii_timer.function) {
 986                                 /* The timer's already set up, so fire it off */
 987                                 mod_timer(&bond->mii_timer, jiffies + 1);
 988                         } else {
 989                                 /* Set up the timer. */
 990                                 init_timer(&bond->mii_timer);
 991                                 bond->mii_timer.expires = jiffies + 1;
 992                                 bond->mii_timer.data =
 993                                         (unsigned long) bond->dev;
 994                                 bond->mii_timer.function =
 995                                         (void *) &bond_mii_monitor;
 996                                 add_timer(&bond->mii_timer);
 997                         }
 998                 }
 999         }
1000 out:
1001         return ret;
1002 }
1003 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1004
1005 /*
1006  * Show and set the primary slave.  The store function is much
1007  * simpler than bonding_store_slaves function because it only needs to
1008  * handle one interface name.
1009  * The bond must be a mode that supports a primary for this be
1010  * set.
1011  */
1012 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
1013 {
1014         int count = 0;
1015         struct bonding *bond = to_bond(cd);
1016
1017         if (bond->primary_slave)
1018                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
1019         else
1020                 count = sprintf(buf, "\n") + 1;
1021
1022         return count;
1023 }
1024
1025 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
1026 {
1027         int i;
1028         struct slave *slave;
1029         struct bonding *bond = to_bond(cd);
1030
1031         write_lock_bh(&bond->lock);
1032         if (!USES_PRIMARY(bond->params.mode)) {
1033                 printk(KERN_INFO DRV_NAME
1034                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1035                        bond->dev->name, bond->dev->name, bond->params.mode);
1036         } else {
1037                 bond_for_each_slave(bond, slave, i) {
1038                         if (strnicmp
1039                             (slave->dev->name, buf,
1040                              strlen(slave->dev->name)) == 0) {
1041                                 printk(KERN_INFO DRV_NAME
1042                                        ": %s: Setting %s as primary slave.\n",
1043                                        bond->dev->name, slave->dev->name);
1044                                 bond->primary_slave = slave;
1045                                 bond_select_active_slave(bond);
1046                                 goto out;
1047                         }
1048                 }
1049
1050                 /* if we got here, then we didn't match the name of any slave */
1051
1052                 if (strlen(buf) == 0 || buf[0] == '\n') {
1053                         printk(KERN_INFO DRV_NAME
1054                                ": %s: Setting primary slave to None.\n",
1055                                bond->dev->name);
1056                         bond->primary_slave = NULL;
1057                                 bond_select_active_slave(bond);
1058                 } else {
1059                         printk(KERN_INFO DRV_NAME
1060                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1061                                bond->dev->name, (int)strlen(buf) - 1, buf);
1062                 }
1063         }
1064 out:
1065         write_unlock_bh(&bond->lock);
1066         return count;
1067 }
1068 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1069
1070 /*
1071  * Show and set the use_carrier flag.
1072  */
1073 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1074 {
1075         struct bonding *bond = to_bond(cd);
1076
1077         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1078 }
1079
1080 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1081 {
1082         int new_value, ret = count;
1083         struct bonding *bond = to_bond(cd);
1084
1085
1086         if (sscanf(buf, "%d", &new_value) != 1) {
1087                 printk(KERN_ERR DRV_NAME
1088                        ": %s: no use_carrier value specified.\n",
1089                        bond->dev->name);
1090                 ret = -EINVAL;
1091                 goto out;
1092         }
1093         if ((new_value == 0) || (new_value == 1)) {
1094                 bond->params.use_carrier = new_value;
1095                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1096                        bond->dev->name, new_value);
1097         } else {
1098                 printk(KERN_INFO DRV_NAME
1099                        ": %s: Ignoring invalid use_carrier value %d.\n",
1100                        bond->dev->name, new_value);
1101         }
1102 out:
1103         return count;
1104 }
1105 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1106
1107
1108 /*
1109  * Show and set currently active_slave.
1110  */
1111 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1112 {
1113         struct slave *curr;
1114         struct bonding *bond = to_bond(cd);
1115         int count;
1116
1117
1118         read_lock(&bond->curr_slave_lock);
1119         curr = bond->curr_active_slave;
1120         read_unlock(&bond->curr_slave_lock);
1121
1122         if (USES_PRIMARY(bond->params.mode) && curr)
1123                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1124         else
1125                 count = sprintf(buf, "\n") + 1;
1126         return count;
1127 }
1128
1129 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1130 {
1131         int i;
1132         struct slave *slave;
1133         struct slave *old_active = NULL;
1134         struct slave *new_active = NULL;
1135         struct bonding *bond = to_bond(cd);
1136
1137         write_lock_bh(&bond->lock);
1138         if (!USES_PRIMARY(bond->params.mode)) {
1139                 printk(KERN_INFO DRV_NAME
1140                        ": %s: Unable to change active slave; %s is in mode %d\n",
1141                        bond->dev->name, bond->dev->name, bond->params.mode);
1142         } else {
1143                 bond_for_each_slave(bond, slave, i) {
1144                         if (strnicmp
1145                             (slave->dev->name, buf,
1146                              strlen(slave->dev->name)) == 0) {
1147                                 old_active = bond->curr_active_slave;
1148                                 new_active = slave;
1149                                 if (new_active == old_active) {
1150                                         /* do nothing */
1151                                         printk(KERN_INFO DRV_NAME
1152                                                ": %s: %s is already the current active slave.\n",
1153                                                bond->dev->name, slave->dev->name);
1154                                         goto out;
1155                                 }
1156                                 else {
1157                                         if ((new_active) &&
1158                                             (old_active) &&
1159                                             (new_active->link == BOND_LINK_UP) &&
1160                                             IS_UP(new_active->dev)) {
1161                                                 printk(KERN_INFO DRV_NAME
1162                                                       ": %s: Setting %s as active slave.\n",
1163                                                       bond->dev->name, slave->dev->name);
1164                                                 bond_change_active_slave(bond, new_active);
1165                                         }
1166                                         else {
1167                                                 printk(KERN_INFO DRV_NAME
1168                                                       ": %s: Could not set %s as active slave; "
1169                                                       "either %s is down or the link is down.\n",
1170                                                       bond->dev->name, slave->dev->name,
1171                                                       slave->dev->name);
1172                                         }
1173                                         goto out;
1174                                 }
1175                         }
1176                 }
1177
1178                 /* if we got here, then we didn't match the name of any slave */
1179
1180                 if (strlen(buf) == 0 || buf[0] == '\n') {
1181                         printk(KERN_INFO DRV_NAME
1182                                ": %s: Setting active slave to None.\n",
1183                                bond->dev->name);
1184                         bond->primary_slave = NULL;
1185                                 bond_select_active_slave(bond);
1186                 } else {
1187                         printk(KERN_INFO DRV_NAME
1188                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1189                                bond->dev->name, (int)strlen(buf) - 1, buf);
1190                 }
1191         }
1192 out:
1193         write_unlock_bh(&bond->lock);
1194         return count;
1195
1196 }
1197 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1198
1199
1200 /*
1201  * Show link status of the bond interface.
1202  */
1203 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1204 {
1205         struct slave *curr;
1206         struct bonding *bond = to_bond(cd);
1207
1208         read_lock(&bond->curr_slave_lock);
1209         curr = bond->curr_active_slave;
1210         read_unlock(&bond->curr_slave_lock);
1211
1212         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1213 }
1214 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1215
1216
1217 /*
1218  * Show current 802.3ad aggregator ID.
1219  */
1220 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1221 {
1222         int count = 0;
1223         struct bonding *bond = to_bond(cd);
1224
1225         if (bond->params.mode == BOND_MODE_8023AD) {
1226                 struct ad_info ad_info;
1227                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1228         }
1229         else
1230                 count = sprintf(buf, "\n") + 1;
1231
1232         return count;
1233 }
1234 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1235
1236
1237 /*
1238  * Show number of active 802.3ad ports.
1239  */
1240 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1241 {
1242         int count = 0;
1243         struct bonding *bond = to_bond(cd);
1244
1245         if (bond->params.mode == BOND_MODE_8023AD) {
1246                 struct ad_info ad_info;
1247                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1248         }
1249         else
1250                 count = sprintf(buf, "\n") + 1;
1251
1252         return count;
1253 }
1254 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1255
1256
1257 /*
1258  * Show current 802.3ad actor key.
1259  */
1260 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1261 {
1262         int count = 0;
1263         struct bonding *bond = to_bond(cd);
1264
1265         if (bond->params.mode == BOND_MODE_8023AD) {
1266                 struct ad_info ad_info;
1267                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1268         }
1269         else
1270                 count = sprintf(buf, "\n") + 1;
1271
1272         return count;
1273 }
1274 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1275
1276
1277 /*
1278  * Show current 802.3ad partner key.
1279  */
1280 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1281 {
1282         int count = 0;
1283         struct bonding *bond = to_bond(cd);
1284
1285         if (bond->params.mode == BOND_MODE_8023AD) {
1286                 struct ad_info ad_info;
1287                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1288         }
1289         else
1290                 count = sprintf(buf, "\n") + 1;
1291
1292         return count;
1293 }
1294 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1295
1296
1297 /*
1298  * Show current 802.3ad partner mac.
1299  */
1300 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1301 {
1302         int count = 0;
1303         struct bonding *bond = to_bond(cd);
1304
1305         if (bond->params.mode == BOND_MODE_8023AD) {
1306                 struct ad_info ad_info;
1307                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1308                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1309                                        ad_info.partner_system[0],
1310                                        ad_info.partner_system[1],
1311                                        ad_info.partner_system[2],
1312                                        ad_info.partner_system[3],
1313                                        ad_info.partner_system[4],
1314                                        ad_info.partner_system[5]) + 1;
1315                 }
1316         }
1317         else
1318                 count = sprintf(buf, "\n") + 1;
1319
1320         return count;
1321 }
1322 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1323
1324
1325
1326 static struct attribute *per_bond_attrs[] = {
1327         &class_device_attr_slaves.attr,
1328         &class_device_attr_mode.attr,
1329         &class_device_attr_arp_validate.attr,
1330         &class_device_attr_arp_interval.attr,
1331         &class_device_attr_arp_ip_target.attr,
1332         &class_device_attr_downdelay.attr,
1333         &class_device_attr_updelay.attr,
1334         &class_device_attr_lacp_rate.attr,
1335         &class_device_attr_xmit_hash_policy.attr,
1336         &class_device_attr_miimon.attr,
1337         &class_device_attr_primary.attr,
1338         &class_device_attr_use_carrier.attr,
1339         &class_device_attr_active_slave.attr,
1340         &class_device_attr_mii_status.attr,
1341         &class_device_attr_ad_aggregator.attr,
1342         &class_device_attr_ad_num_ports.attr,
1343         &class_device_attr_ad_actor_key.attr,
1344         &class_device_attr_ad_partner_key.attr,
1345         &class_device_attr_ad_partner_mac.attr,
1346         NULL,
1347 };
1348
1349 static struct attribute_group bonding_group = {
1350         .name = "bonding",
1351         .attrs = per_bond_attrs,
1352 };
1353
1354 /*
1355  * Initialize sysfs.  This sets up the bonding_masters file in
1356  * /sys/class/net.
1357  */
1358 int bond_create_sysfs(void)
1359 {
1360         int ret = 0;
1361         struct bonding *firstbond;
1362
1363         init_rwsem(&bonding_rwsem);
1364
1365         /* get the netdev class pointer */
1366         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1367         if (!firstbond)
1368                 return -ENODEV;
1369
1370         netdev_class = firstbond->dev->class_dev.class;
1371         if (!netdev_class)
1372                 return -ENODEV;
1373
1374         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1375
1376         return ret;
1377
1378 }
1379
1380 /*
1381  * Remove /sys/class/net/bonding_masters.
1382  */
1383 void bond_destroy_sysfs(void)
1384 {
1385         if (netdev_class)
1386                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1387 }
1388
1389 /*
1390  * Initialize sysfs for each bond.  This sets up and registers
1391  * the 'bondctl' directory for each individual bond under /sys/class/net.
1392  */
1393 int bond_create_sysfs_entry(struct bonding *bond)
1394 {
1395         struct net_device *dev = bond->dev;
1396         int err;
1397
1398         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1399         if (err) {
1400                 printk(KERN_EMERG "eek! didn't create group!\n");
1401         }
1402
1403         if (expected_refcount < 1)
1404                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1405
1406         return err;
1407 }
1408 /*
1409  * Remove sysfs entries for each bond.
1410  */
1411 void bond_destroy_sysfs_entry(struct bonding *bond)
1412 {
1413         struct net_device *dev = bond->dev;
1414
1415         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1416 }
1417