git.oblomov.eu Git - linux-2.6/blob - drivers/net/bonding/bond_sysfs.c

   1
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  */
  23 #include <linux/config.h>
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/sched.h>
  27 #include <linux/device.h>
  28 #include <linux/sysdev.h>
  29 #include <linux/fs.h>
  30 #include <linux/types.h>
  31 #include <linux/string.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/inetdevice.h>
  34 #include <linux/in.h>
  35 #include <linux/sysfs.h>
  36 #include <linux/string.h>
  37 #include <linux/ctype.h>
  38 #include <linux/inet.h>
  39 #include <linux/rtnetlink.h>
  40
  41 /* #define BONDING_DEBUG 1 */
  42 #include "bonding.h"
  43 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
  44 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
  45 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  46
  47 /*---------------------------- Declarations -------------------------------*/
  48
  49
  50 extern struct list_head bond_dev_list;
  51 extern struct bond_params bonding_defaults;
  52 extern struct bond_parm_tbl bond_mode_tbl[];
  53 extern struct bond_parm_tbl bond_lacp_tbl[];
  54 extern struct bond_parm_tbl xmit_hashtype_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 the arp timer interval.  There are two tricky bits
 508  * here.  First, if ARP monitoring is activated, then we must disable
 509  * MII monitoring.  Second, if the ARP timer isn't running, we must
 510  * start it.
 511  */
 512 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
 513 {
 514         struct bonding *bond = to_bond(cd);
 515
 516         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 517 }
 518
 519 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
 520 {
 521         int new_value, ret = count;
 522         struct bonding *bond = to_bond(cd);
 523
 524         if (sscanf(buf, "%d", &new_value) != 1) {
 525                 printk(KERN_ERR DRV_NAME
 526                        ": %s: no arp_interval value specified.\n",
 527                        bond->dev->name);
 528                 ret = -EINVAL;
 529                 goto out;
 530         }
 531         if (new_value < 0) {
 532                 printk(KERN_ERR DRV_NAME
 533                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 534                        bond->dev->name, new_value, INT_MAX);
 535                 ret = -EINVAL;
 536                 goto out;
 537         }
 538
 539         printk(KERN_INFO DRV_NAME
 540                ": %s: Setting ARP monitoring interval to %d.\n",
 541                bond->dev->name, new_value);
 542         bond->params.arp_interval = new_value;
 543         if (bond->params.miimon) {
 544                 printk(KERN_INFO DRV_NAME
 545                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 546                        "%s Disabling MII monitoring.\n",
 547                        bond->dev->name, bond->dev->name);
 548                 bond->params.miimon = 0;
 549                 /* Kill MII timer, else it brings bond's link down */
 550                 if (bond->arp_timer.function) {
 551                         printk(KERN_INFO DRV_NAME
 552                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 553                        bond->dev->name);
 554                         del_timer_sync(&bond->mii_timer);
 555                 }
 556         }
 557         if (!bond->params.arp_targets[0]) {
 558                 printk(KERN_INFO DRV_NAME
 559                        ": %s: ARP monitoring has been set up, "
 560                        "but no ARP targets have been specified.\n",
 561                        bond->dev->name);
 562         }
 563         if (bond->dev->flags & IFF_UP) {
 564                 /* If the interface is up, we may need to fire off
 565                  * the ARP timer.  If the interface is down, the
 566                  * timer will get fired off when the open function
 567                  * is called.
 568                  */
 569                 if (bond->arp_timer.function) {
 570                         /* The timer's already set up, so fire it off */
 571                         mod_timer(&bond->arp_timer, jiffies + 1);
 572                 } else {
 573                         /* Set up the timer. */
 574                         init_timer(&bond->arp_timer);
 575                         bond->arp_timer.expires = jiffies + 1;
 576                         bond->arp_timer.data =
 577                                 (unsigned long) bond->dev;
 578                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 579                                 bond->arp_timer.function =
 580                                         (void *)
 581                                         &bond_activebackup_arp_mon;
 582                         } else {
 583                                 bond->arp_timer.function =
 584                                         (void *)
 585                                         &bond_loadbalance_arp_mon;
 586                         }
 587                         add_timer(&bond->arp_timer);
 588                 }
 589         }
 590
 591 out:
 592         return ret;
 593 }
 594 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 595
 596 /*
 597  * Show and set the arp targets.
 598  */
 599 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
 600 {
 601         int i, res = 0;
 602         struct bonding *bond = to_bond(cd);
 603
 604         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 605                 if (bond->params.arp_targets[i])
 606                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 607                                NIPQUAD(bond->params.arp_targets[i]));
 608         }
 609         if (res)
 610                 res--;  /* eat the leftover space */
 611         res += sprintf(buf + res, "\n");
 612         res++;
 613         return res;
 614 }
 615
 616 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
 617 {
 618         u32 newtarget;
 619         int i = 0, done = 0, ret = count;
 620         struct bonding *bond = to_bond(cd);
 621         u32 *targets;
 622
 623         targets = bond->params.arp_targets;
 624         newtarget = in_aton(buf + 1);
 625         /* look for adds */
 626         if (buf[0] == '+') {
 627                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 628                         printk(KERN_ERR DRV_NAME
 629                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 630                                bond->dev->name, NIPQUAD(newtarget));
 631                         ret = -EINVAL;
 632                         goto out;
 633                 }
 634                 /* look for an empty slot to put the target in, and check for dupes */
 635                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 636                         if (targets[i] == newtarget) { /* duplicate */
 637                                 printk(KERN_ERR DRV_NAME
 638                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 639                                        bond->dev->name, NIPQUAD(newtarget));
 640                                 if (done)
 641                                         targets[i] = 0;
 642                                 ret = -EINVAL;
 643                                 goto out;
 644                         }
 645                         if (targets[i] == 0 && !done) {
 646                                 printk(KERN_INFO DRV_NAME
 647                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 648                                        bond->dev->name, NIPQUAD(newtarget));
 649                                 done = 1;
 650                                 targets[i] = newtarget;
 651                         }
 652                 }
 653                 if (!done) {
 654                         printk(KERN_ERR DRV_NAME
 655                                ": %s: ARP target table is full!\n",
 656                                bond->dev->name);
 657                         ret = -EINVAL;
 658                         goto out;
 659                 }
 660
 661         }
 662         else if (buf[0] == '-') {
 663                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 664                         printk(KERN_ERR DRV_NAME
 665                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 666                                bond->dev->name, NIPQUAD(newtarget));
 667                         ret = -EINVAL;
 668                         goto out;
 669                 }
 670
 671                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 672                         if (targets[i] == newtarget) {
 673                                 printk(KERN_INFO DRV_NAME
 674                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 675                                        bond->dev->name, NIPQUAD(newtarget));
 676                                 targets[i] = 0;
 677                                 done = 1;
 678                         }
 679                 }
 680                 if (!done) {
 681                         printk(KERN_INFO DRV_NAME
 682                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 683                                bond->dev->name, NIPQUAD(newtarget));
 684                         ret = -EINVAL;
 685                         goto out;
 686                 }
 687         }
 688         else {
 689                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 690                         bond->dev->name);
 691                 ret = -EPERM;
 692                 goto out;
 693         }
 694
 695 out:
 696         return ret;
 697 }
 698 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 699
 700 /*
 701  * Show and set the up and down delays.  These must be multiples of the
 702  * MII monitoring value, and are stored internally as the multiplier.
 703  * Thus, we must translate to MS for the real world.
 704  */
 705 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
 706 {
 707         struct bonding *bond = to_bond(cd);
 708
 709         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 710 }
 711
 712 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
 713 {
 714         int new_value, ret = count;
 715         struct bonding *bond = to_bond(cd);
 716
 717         if (!(bond->params.miimon)) {
 718                 printk(KERN_ERR DRV_NAME
 719                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 720                        bond->dev->name);
 721                 ret = -EPERM;
 722                 goto out;
 723         }
 724
 725         if (sscanf(buf, "%d", &new_value) != 1) {
 726                 printk(KERN_ERR DRV_NAME
 727                        ": %s: no down delay value specified.\n",
 728                        bond->dev->name);
 729                 ret = -EINVAL;
 730                 goto out;
 731         }
 732         if (new_value < 0) {
 733                 printk(KERN_ERR DRV_NAME
 734                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 735                        bond->dev->name, new_value, 1, INT_MAX);
 736                 ret = -EINVAL;
 737                 goto out;
 738         } else {
 739                 if ((new_value % bond->params.miimon) != 0) {
 740                         printk(KERN_WARNING DRV_NAME
 741                                ": %s: Warning: down delay (%d) is not a multiple "
 742                                "of miimon (%d), delay rounded to %d ms\n",
 743                                bond->dev->name, new_value, bond->params.miimon,
 744                                (new_value / bond->params.miimon) *
 745                                bond->params.miimon);
 746                 }
 747                 bond->params.downdelay = new_value / bond->params.miimon;
 748                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 749                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 750
 751         }
 752
 753 out:
 754         return ret;
 755 }
 756 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 757
 758 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
 759 {
 760         struct bonding *bond = to_bond(cd);
 761
 762         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 763
 764 }
 765
 766 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
 767 {
 768         int new_value, ret = count;
 769         struct bonding *bond = to_bond(cd);
 770
 771         if (!(bond->params.miimon)) {
 772                 printk(KERN_ERR DRV_NAME
 773                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 774                        bond->dev->name);
 775                 ret = -EPERM;
 776                 goto out;
 777         }
 778
 779         if (sscanf(buf, "%d", &new_value) != 1) {
 780                 printk(KERN_ERR DRV_NAME
 781                        ": %s: no up delay value specified.\n",
 782                        bond->dev->name);
 783                 ret = -EINVAL;
 784                 goto out;
 785         }
 786         if (new_value < 0) {
 787                 printk(KERN_ERR DRV_NAME
 788                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 789                        bond->dev->name, new_value, 1, INT_MAX);
 790                 ret = -EINVAL;
 791                 goto out;
 792         } else {
 793                 if ((new_value % bond->params.miimon) != 0) {
 794                         printk(KERN_WARNING DRV_NAME
 795                                ": %s: Warning: up delay (%d) is not a multiple "
 796                                "of miimon (%d), updelay rounded to %d ms\n",
 797                                bond->dev->name, new_value, bond->params.miimon,
 798                                (new_value / bond->params.miimon) *
 799                                bond->params.miimon);
 800                 }
 801                 bond->params.updelay = new_value / bond->params.miimon;
 802                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 803                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 804
 805         }
 806
 807 out:
 808         return ret;
 809 }
 810 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 811
 812 /*
 813  * Show and set the LACP interval.  Interface must be down, and the mode
 814  * must be set to 802.3ad mode.
 815  */
 816 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
 817 {
 818         struct bonding *bond = to_bond(cd);
 819
 820         return sprintf(buf, "%s %d\n",
 821                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 822                 bond->params.lacp_fast) + 1;
 823 }
 824
 825 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
 826 {
 827         int new_value, ret = count;
 828         struct bonding *bond = to_bond(cd);
 829
 830         if (bond->dev->flags & IFF_UP) {
 831                 printk(KERN_ERR DRV_NAME
 832                        ": %s: Unable to update LACP rate because interface is up.\n",
 833                        bond->dev->name);
 834                 ret = -EPERM;
 835                 goto out;
 836         }
 837
 838         if (bond->params.mode != BOND_MODE_8023AD) {
 839                 printk(KERN_ERR DRV_NAME
 840                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 841                        bond->dev->name);
 842                 ret = -EPERM;
 843                 goto out;
 844         }
 845
 846         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 847
 848         if ((new_value == 1) || (new_value == 0)) {
 849                 bond->params.lacp_fast = new_value;
 850                 printk(KERN_INFO DRV_NAME
 851                        ": %s: Setting LACP rate to %s (%d).\n",
 852                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 853         } else {
 854                 printk(KERN_ERR DRV_NAME
 855                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 856                         bond->dev->name, (int)strlen(buf) - 1, buf);
 857                 ret = -EINVAL;
 858         }
 859 out:
 860         return ret;
 861 }
 862 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 863
 864 /*
 865  * Show and set the MII monitor interval.  There are two tricky bits
 866  * here.  First, if MII monitoring is activated, then we must disable
 867  * ARP monitoring.  Second, if the timer isn't running, we must
 868  * start it.
 869  */
 870 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
 871 {
 872         struct bonding *bond = to_bond(cd);
 873
 874         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 875 }
 876
 877 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
 878 {
 879         int new_value, ret = count;
 880         struct bonding *bond = to_bond(cd);
 881
 882         if (sscanf(buf, "%d", &new_value) != 1) {
 883                 printk(KERN_ERR DRV_NAME
 884                        ": %s: no miimon value specified.\n",
 885                        bond->dev->name);
 886                 ret = -EINVAL;
 887                 goto out;
 888         }
 889         if (new_value < 0) {
 890                 printk(KERN_ERR DRV_NAME
 891                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 892                        bond->dev->name, new_value, 1, INT_MAX);
 893                 ret = -EINVAL;
 894                 goto out;
 895         } else {
 896                 printk(KERN_INFO DRV_NAME
 897                        ": %s: Setting MII monitoring interval to %d.\n",
 898                        bond->dev->name, new_value);
 899                 bond->params.miimon = new_value;
 900                 if(bond->params.updelay)
 901                         printk(KERN_INFO DRV_NAME
 902                               ": %s: Note: Updating updelay (to %d) "
 903                               "since it is a multiple of the miimon value.\n",
 904                               bond->dev->name,
 905                               bond->params.updelay * bond->params.miimon);
 906                 if(bond->params.downdelay)
 907                         printk(KERN_INFO DRV_NAME
 908                               ": %s: Note: Updating downdelay (to %d) "
 909                               "since it is a multiple of the miimon value.\n",
 910                               bond->dev->name,
 911                               bond->params.downdelay * bond->params.miimon);
 912                 if (bond->params.arp_interval) {
 913                         printk(KERN_INFO DRV_NAME
 914                                ": %s: MII monitoring cannot be used with "
 915                                "ARP monitoring. Disabling ARP monitoring...\n",
 916                                bond->dev->name);
 917                         bond->params.arp_interval = 0;
 918                         /* Kill ARP timer, else it brings bond's link down */
 919                         if (bond->mii_timer.function) {
 920                                 printk(KERN_INFO DRV_NAME
 921                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
 922                                bond->dev->name);
 923                                 del_timer_sync(&bond->arp_timer);
 924                         }
 925                 }
 926
 927                 if (bond->dev->flags & IFF_UP) {
 928                         /* If the interface is up, we may need to fire off
 929                          * the MII timer. If the interface is down, the
 930                          * timer will get fired off when the open function
 931                          * is called.
 932                          */
 933                         if (bond->mii_timer.function) {
 934                                 /* The timer's already set up, so fire it off */
 935                                 mod_timer(&bond->mii_timer, jiffies + 1);
 936                         } else {
 937                                 /* Set up the timer. */
 938                                 init_timer(&bond->mii_timer);
 939                                 bond->mii_timer.expires = jiffies + 1;
 940                                 bond->mii_timer.data =
 941                                         (unsigned long) bond->dev;
 942                                 bond->mii_timer.function =
 943                                         (void *) &bond_mii_monitor;
 944                                 add_timer(&bond->mii_timer);
 945                         }
 946                 }
 947         }
 948 out:
 949         return ret;
 950 }
 951 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
 952
 953 /*
 954  * Show and set the primary slave.  The store function is much
 955  * simpler than bonding_store_slaves function because it only needs to
 956  * handle one interface name.
 957  * The bond must be a mode that supports a primary for this be
 958  * set.
 959  */
 960 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
 961 {
 962         int count = 0;
 963         struct bonding *bond = to_bond(cd);
 964
 965         if (bond->primary_slave)
 966                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
 967         else
 968                 count = sprintf(buf, "\n") + 1;
 969
 970         return count;
 971 }
 972
 973 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
 974 {
 975         int i;
 976         struct slave *slave;
 977         struct bonding *bond = to_bond(cd);
 978
 979         write_lock_bh(&bond->lock);
 980         if (!USES_PRIMARY(bond->params.mode)) {
 981                 printk(KERN_INFO DRV_NAME
 982                        ": %s: Unable to set primary slave; %s is in mode %d\n",
 983                        bond->dev->name, bond->dev->name, bond->params.mode);
 984         } else {
 985                 bond_for_each_slave(bond, slave, i) {
 986                         if (strnicmp
 987                             (slave->dev->name, buf,
 988                              strlen(slave->dev->name)) == 0) {
 989                                 printk(KERN_INFO DRV_NAME
 990                                        ": %s: Setting %s as primary slave.\n",
 991                                        bond->dev->name, slave->dev->name);
 992                                 bond->primary_slave = slave;
 993                                 bond_select_active_slave(bond);
 994                                 goto out;
 995                         }
 996                 }
 997
 998                 /* if we got here, then we didn't match the name of any slave */
 999
1000                 if (strlen(buf) == 0 || buf[0] == '\n') {
1001                         printk(KERN_INFO DRV_NAME
1002                                ": %s: Setting primary slave to None.\n",
1003                                bond->dev->name);
1004                         bond->primary_slave = NULL;
1005                                 bond_select_active_slave(bond);
1006                 } else {
1007                         printk(KERN_INFO DRV_NAME
1008                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1009                                bond->dev->name, (int)strlen(buf) - 1, buf);
1010                 }
1011         }
1012 out:
1013         write_unlock_bh(&bond->lock);
1014         return count;
1015 }
1016 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1017
1018 /*
1019  * Show and set the use_carrier flag.
1020  */
1021 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1022 {
1023         struct bonding *bond = to_bond(cd);
1024
1025         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1026 }
1027
1028 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1029 {
1030         int new_value, ret = count;
1031         struct bonding *bond = to_bond(cd);
1032
1033
1034         if (sscanf(buf, "%d", &new_value) != 1) {
1035                 printk(KERN_ERR DRV_NAME
1036                        ": %s: no use_carrier value specified.\n",
1037                        bond->dev->name);
1038                 ret = -EINVAL;
1039                 goto out;
1040         }
1041         if ((new_value == 0) || (new_value == 1)) {
1042                 bond->params.use_carrier = new_value;
1043                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1044                        bond->dev->name, new_value);
1045         } else {
1046                 printk(KERN_INFO DRV_NAME
1047                        ": %s: Ignoring invalid use_carrier value %d.\n",
1048                        bond->dev->name, new_value);
1049         }
1050 out:
1051         return count;
1052 }
1053 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1054
1055
1056 /*
1057  * Show and set currently active_slave.
1058  */
1059 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1060 {
1061         struct slave *curr;
1062         struct bonding *bond = to_bond(cd);
1063         int count;
1064
1065
1066         read_lock(&bond->curr_slave_lock);
1067         curr = bond->curr_active_slave;
1068         read_unlock(&bond->curr_slave_lock);
1069
1070         if (USES_PRIMARY(bond->params.mode) && curr)
1071                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1072         else
1073                 count = sprintf(buf, "\n") + 1;
1074         return count;
1075 }
1076
1077 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1078 {
1079         int i;
1080         struct slave *slave;
1081         struct slave *old_active = NULL;
1082         struct slave *new_active = NULL;
1083         struct bonding *bond = to_bond(cd);
1084
1085         write_lock_bh(&bond->lock);
1086         if (!USES_PRIMARY(bond->params.mode)) {
1087                 printk(KERN_INFO DRV_NAME
1088                        ": %s: Unable to change active slave; %s is in mode %d\n",
1089                        bond->dev->name, bond->dev->name, bond->params.mode);
1090         } else {
1091                 bond_for_each_slave(bond, slave, i) {
1092                         if (strnicmp
1093                             (slave->dev->name, buf,
1094                              strlen(slave->dev->name)) == 0) {
1095                                 old_active = bond->curr_active_slave;
1096                                 new_active = slave;
1097                                 if (new_active && (new_active == old_active)) {
1098                                         /* do nothing */
1099                                         printk(KERN_INFO DRV_NAME
1100                                                ": %s: %s is already the current active slave.\n",
1101                                                bond->dev->name, slave->dev->name);
1102                                         goto out;
1103                                 }
1104                                 else {
1105                                         if ((new_active) &&
1106                                             (old_active) &&
1107                                             (new_active->link == BOND_LINK_UP) &&
1108                                             IS_UP(new_active->dev)) {
1109                                                 printk(KERN_INFO DRV_NAME
1110                                                       ": %s: Setting %s as active slave.\n",
1111                                                       bond->dev->name, slave->dev->name);
1112                                                 bond_change_active_slave(bond, new_active);
1113                                         }
1114                                         else {
1115                                                 printk(KERN_INFO DRV_NAME
1116                                                       ": %s: Could not set %s as active slave; "
1117                                                       "either %s is down or the link is down.\n",
1118                                                       bond->dev->name, slave->dev->name,
1119                                                       slave->dev->name);
1120                                         }
1121                                         goto out;
1122                                 }
1123                         }
1124                 }
1125
1126                 /* if we got here, then we didn't match the name of any slave */
1127
1128                 if (strlen(buf) == 0 || buf[0] == '\n') {
1129                         printk(KERN_INFO DRV_NAME
1130                                ": %s: Setting active slave to None.\n",
1131                                bond->dev->name);
1132                         bond->primary_slave = NULL;
1133                                 bond_select_active_slave(bond);
1134                 } else {
1135                         printk(KERN_INFO DRV_NAME
1136                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1137                                bond->dev->name, (int)strlen(buf) - 1, buf);
1138                 }
1139         }
1140 out:
1141         write_unlock_bh(&bond->lock);
1142         return count;
1143
1144 }
1145 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1146
1147
1148 /*
1149  * Show link status of the bond interface.
1150  */
1151 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1152 {
1153         struct slave *curr;
1154         struct bonding *bond = to_bond(cd);
1155
1156         read_lock(&bond->curr_slave_lock);
1157         curr = bond->curr_active_slave;
1158         read_unlock(&bond->curr_slave_lock);
1159
1160         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1161 }
1162 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1163
1164
1165 /*
1166  * Show current 802.3ad aggregator ID.
1167  */
1168 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1169 {
1170         int count = 0;
1171         struct bonding *bond = to_bond(cd);
1172
1173         if (bond->params.mode == BOND_MODE_8023AD) {
1174                 struct ad_info ad_info;
1175                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1176         }
1177         else
1178                 count = sprintf(buf, "\n") + 1;
1179
1180         return count;
1181 }
1182 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1183
1184
1185 /*
1186  * Show number of active 802.3ad ports.
1187  */
1188 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1189 {
1190         int count = 0;
1191         struct bonding *bond = to_bond(cd);
1192
1193         if (bond->params.mode == BOND_MODE_8023AD) {
1194                 struct ad_info ad_info;
1195                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1196         }
1197         else
1198                 count = sprintf(buf, "\n") + 1;
1199
1200         return count;
1201 }
1202 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1203
1204
1205 /*
1206  * Show current 802.3ad actor key.
1207  */
1208 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1209 {
1210         int count = 0;
1211         struct bonding *bond = to_bond(cd);
1212
1213         if (bond->params.mode == BOND_MODE_8023AD) {
1214                 struct ad_info ad_info;
1215                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1216         }
1217         else
1218                 count = sprintf(buf, "\n") + 1;
1219
1220         return count;
1221 }
1222 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1223
1224
1225 /*
1226  * Show current 802.3ad partner key.
1227  */
1228 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1229 {
1230         int count = 0;
1231         struct bonding *bond = to_bond(cd);
1232
1233         if (bond->params.mode == BOND_MODE_8023AD) {
1234                 struct ad_info ad_info;
1235                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1236         }
1237         else
1238                 count = sprintf(buf, "\n") + 1;
1239
1240         return count;
1241 }
1242 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1243
1244
1245 /*
1246  * Show current 802.3ad partner mac.
1247  */
1248 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1249 {
1250         int count = 0;
1251         struct bonding *bond = to_bond(cd);
1252
1253         if (bond->params.mode == BOND_MODE_8023AD) {
1254                 struct ad_info ad_info;
1255                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1256                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1257                                        ad_info.partner_system[0],
1258                                        ad_info.partner_system[1],
1259                                        ad_info.partner_system[2],
1260                                        ad_info.partner_system[3],
1261                                        ad_info.partner_system[4],
1262                                        ad_info.partner_system[5]) + 1;
1263                 }
1264         }
1265         else
1266                 count = sprintf(buf, "\n") + 1;
1267
1268         return count;
1269 }
1270 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1271
1272
1273
1274 static struct attribute *per_bond_attrs[] = {
1275         &class_device_attr_slaves.attr,
1276         &class_device_attr_mode.attr,
1277         &class_device_attr_arp_interval.attr,
1278         &class_device_attr_arp_ip_target.attr,
1279         &class_device_attr_downdelay.attr,
1280         &class_device_attr_updelay.attr,
1281         &class_device_attr_lacp_rate.attr,
1282         &class_device_attr_xmit_hash_policy.attr,
1283         &class_device_attr_miimon.attr,
1284         &class_device_attr_primary.attr,
1285         &class_device_attr_use_carrier.attr,
1286         &class_device_attr_active_slave.attr,
1287         &class_device_attr_mii_status.attr,
1288         &class_device_attr_ad_aggregator.attr,
1289         &class_device_attr_ad_num_ports.attr,
1290         &class_device_attr_ad_actor_key.attr,
1291         &class_device_attr_ad_partner_key.attr,
1292         &class_device_attr_ad_partner_mac.attr,
1293         NULL,
1294 };
1295
1296 static struct attribute_group bonding_group = {
1297         .name = "bonding",
1298         .attrs = per_bond_attrs,
1299 };
1300
1301 /*
1302  * Initialize sysfs.  This sets up the bonding_masters file in
1303  * /sys/class/net.
1304  */
1305 int bond_create_sysfs(void)
1306 {
1307         int ret = 0;
1308         struct bonding *firstbond;
1309
1310         init_rwsem(&bonding_rwsem);
1311
1312         /* get the netdev class pointer */
1313         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1314         if (!firstbond)
1315                 return -ENODEV;
1316
1317         netdev_class = firstbond->dev->class_dev.class;
1318         if (!netdev_class)
1319                 return -ENODEV;
1320
1321         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1322
1323         return ret;
1324
1325 }
1326
1327 /*
1328  * Remove /sys/class/net/bonding_masters.
1329  */
1330 void bond_destroy_sysfs(void)
1331 {
1332         if (netdev_class)
1333                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1334 }
1335
1336 /*
1337  * Initialize sysfs for each bond.  This sets up and registers
1338  * the 'bondctl' directory for each individual bond under /sys/class/net.
1339  */
1340 int bond_create_sysfs_entry(struct bonding *bond)
1341 {
1342         struct net_device *dev = bond->dev;
1343         int err;
1344
1345         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1346         if (err) {
1347                 printk(KERN_EMERG "eek! didn't create group!\n");
1348         }
1349
1350         if (expected_refcount < 1)
1351                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1352
1353         return err;
1354 }
1355 /*
1356  * Remove sysfs entries for each bond.
1357  */
1358 void bond_destroy_sysfs_entry(struct bonding *bond)
1359 {
1360         struct net_device *dev = bond->dev;
1361
1362         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1363 }
1364