SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/bonding/bond_sysfs.c

   1
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  */
  23 #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
  55 static int expected_refcount = -1;
  56 static struct class *netdev_class;
  57 /*--------------------------- Data Structures -----------------------------*/
  58
  59 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
  60  * Because kobject_register tries to acquire the subsystem lock.  If
  61  * we already hold the lock (which we would if the user was creating
  62  * a new bond through the sysfs interface), we deadlock.
  63  * This lock is only needed when deleting a bond - we need to make sure
  64  * that we don't collide with an ongoing ioctl.
  65  */
  66
  67 struct rw_semaphore bonding_rwsem;
  68
  69
  70
  71
  72 /*------------------------------ Functions --------------------------------*/
  73
  74 /*
  75  * "show" function for the bond_masters attribute.
  76  * The class parameter is ignored.
  77  */
  78 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
  79 {
  80         int res = 0;
  81         struct bonding *bond;
  82
  83         down_read(&(bonding_rwsem));
  84
  85         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  86                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  87                         /* not enough space for another interface name */
  88                         if ((PAGE_SIZE - res) > 10)
  89                                 res = PAGE_SIZE - 10;
  90                         res += sprintf(buffer + res, "++more++");
  91                         break;
  92                 }
  93                 res += sprintf(buffer + res, "%s ",
  94                                bond->dev->name);
  95         }
  96         res += sprintf(buffer + res, "\n");
  97         res++;
  98         up_read(&(bonding_rwsem));
  99         return res;
 100 }
 101
 102 /*
 103  * "store" function for the bond_masters attribute.  This is what
 104  * creates and deletes entire bonds.
 105  *
 106  * The class parameter is ignored.
 107  *
 108  */
 109
 110 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 111 {
 112         char command[IFNAMSIZ + 1] = {0, };
 113         char *ifname;
 114         int res = count;
 115         struct bonding *bond;
 116         struct bonding *nxt;
 117
 118         down_write(&(bonding_rwsem));
 119         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 120         ifname = command + 1;
 121         if ((strlen(command) <= 1) ||
 122             !dev_valid_name(ifname))
 123                 goto err_no_cmd;
 124
 125         if (command[0] == '+') {
 126
 127                 /* Check to see if the bond already exists. */
 128                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 129                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 130                                 printk(KERN_ERR DRV_NAME
 131                                         ": cannot add bond %s; it already exists\n",
 132                                         ifname);
 133                                 res = -EPERM;
 134                                 goto out;
 135                         }
 136
 137                 printk(KERN_INFO DRV_NAME
 138                         ": %s is being created...\n", ifname);
 139                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 140                         printk(KERN_INFO DRV_NAME
 141                         ": %s interface already exists. Bond creation failed.\n",
 142                         ifname);
 143                         res = -EPERM;
 144                 }
 145                 goto out;
 146         }
 147
 148         if (command[0] == '-') {
 149                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 150                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 151                                 rtnl_lock();
 152                                 /* check the ref count on the bond's kobject.
 153                                  * If it's > expected, then there's a file open,
 154                                  * and we have to fail.
 155                                  */
 156                                 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
 157                                                         > expected_refcount){
 158                                         rtnl_unlock();
 159                                         printk(KERN_INFO DRV_NAME
 160                                                 ": Unable remove bond %s due to open references.\n",
 161                                                 ifname);
 162                                         res = -EPERM;
 163                                         goto out;
 164                                 }
 165                                 printk(KERN_INFO DRV_NAME
 166                                         ": %s is being deleted...\n",
 167                                         bond->dev->name);
 168                                 unregister_netdevice(bond->dev);
 169                                 bond_deinit(bond->dev);
 170                                 bond_destroy_sysfs_entry(bond);
 171                                 rtnl_unlock();
 172                                 goto out;
 173                         }
 174
 175                 printk(KERN_ERR DRV_NAME
 176                         ": unable to delete non-existent bond %s\n", ifname);
 177                 res = -ENODEV;
 178                 goto out;
 179         }
 180
 181 err_no_cmd:
 182         printk(KERN_ERR DRV_NAME
 183                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 184         res = -EPERM;
 185
 186         /* Always return either count or an error.  If you return 0, you'll
 187          * get called forever, which is bad.
 188          */
 189 out:
 190         up_write(&(bonding_rwsem));
 191         return res;
 192 }
 193 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 194 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 195                   bonding_show_bonds, bonding_store_bonds);
 196
 197 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 198 {
 199         char linkname[IFNAMSIZ+7];
 200         int ret = 0;
 201
 202         /* first, create a link from the slave back to the master */
 203         ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
 204                                 "master");
 205         if (ret)
 206                 return ret;
 207         /* next, create a link from the master to the slave */
 208         sprintf(linkname,"slave_%s",slave->name);
 209         ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
 210                                 linkname);
 211         return ret;
 212
 213 }
 214
 215 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 216 {
 217         char linkname[IFNAMSIZ+7];
 218
 219         sysfs_remove_link(&(slave->class_dev.kobj), "master");
 220         sprintf(linkname,"slave_%s",slave->name);
 221         sysfs_remove_link(&(master->class_dev.kobj), linkname);
 222 }
 223
 224
 225 /*
 226  * Show the slaves in the current bond.
 227  */
 228 static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
 229 {
 230         struct slave *slave;
 231         int i, res = 0;
 232         struct bonding *bond = to_bond(cd);
 233
 234         read_lock_bh(&bond->lock);
 235         bond_for_each_slave(bond, slave, i) {
 236                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 237                         /* not enough space for another interface name */
 238                         if ((PAGE_SIZE - res) > 10)
 239                                 res = PAGE_SIZE - 10;
 240                         res += sprintf(buf + res, "++more++");
 241                         break;
 242                 }
 243                 res += sprintf(buf + res, "%s ", slave->dev->name);
 244         }
 245         read_unlock_bh(&bond->lock);
 246         res += sprintf(buf + res, "\n");
 247         res++;
 248         return res;
 249 }
 250
 251 /*
 252  * Set the slaves in the current bond.  The bond interface must be
 253  * up for this to succeed.
 254  * This function is largely the same flow as bonding_update_bonds().
 255  */
 256 static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
 257 {
 258         char command[IFNAMSIZ + 1] = { 0, };
 259         char *ifname;
 260         int i, res, found, ret = count;
 261         struct slave *slave;
 262         struct net_device *dev = NULL;
 263         struct bonding *bond = to_bond(cd);
 264
 265         /* Quick sanity check -- is the bond interface up? */
 266         if (!(bond->dev->flags & IFF_UP)) {
 267                 printk(KERN_ERR DRV_NAME
 268                        ": %s: Unable to update slaves because interface is down.\n",
 269                        bond->dev->name);
 270                 ret = -EPERM;
 271                 goto out;
 272         }
 273
 274         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 275
 276         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 277         ifname = command + 1;
 278         if ((strlen(command) <= 1) ||
 279             !dev_valid_name(ifname))
 280                 goto err_no_cmd;
 281
 282         if (command[0] == '+') {
 283
 284                 /* Got a slave name in ifname.  Is it already in the list? */
 285                 found = 0;
 286                 read_lock_bh(&bond->lock);
 287                 bond_for_each_slave(bond, slave, i)
 288                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 289                                 printk(KERN_ERR DRV_NAME
 290                                        ": %s: Interface %s is already enslaved!\n",
 291                                        bond->dev->name, ifname);
 292                                 ret = -EPERM;
 293                                 read_unlock_bh(&bond->lock);
 294                                 goto out;
 295                         }
 296
 297                 read_unlock_bh(&bond->lock);
 298                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 299                        bond->dev->name, ifname);
 300                 dev = dev_get_by_name(ifname);
 301                 if (!dev) {
 302                         printk(KERN_INFO DRV_NAME
 303                                ": %s: Interface %s does not exist!\n",
 304                                bond->dev->name, ifname);
 305                         ret = -EPERM;
 306                         goto out;
 307                 }
 308                 else
 309                         dev_put(dev);
 310
 311                 if (dev->flags & IFF_UP) {
 312                         printk(KERN_ERR DRV_NAME
 313                                ": %s: Error: Unable to enslave %s "
 314                                "because it is already up.\n",
 315                                bond->dev->name, dev->name);
 316                         ret = -EPERM;
 317                         goto out;
 318                 }
 319                 /* If this is the first slave, then we need to set
 320                    the master's hardware address to be the same as the
 321                    slave's. */
 322                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 323                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 324                                dev->addr_len);
 325                 }
 326
 327                 /* Set the slave's MTU to match the bond */
 328                 if (dev->mtu != bond->dev->mtu) {
 329                         if (dev->change_mtu) {
 330                                 res = dev->change_mtu(dev,
 331                                                       bond->dev->mtu);
 332                                 if (res) {
 333                                         ret = res;
 334                                         goto out;
 335                                 }
 336                         } else {
 337                                 dev->mtu = bond->dev->mtu;
 338                         }
 339                 }
 340                 rtnl_lock();
 341                 res = bond_enslave(bond->dev, dev);
 342                 rtnl_unlock();
 343                 if (res) {
 344                         ret = res;
 345                 }
 346                 goto out;
 347         }
 348
 349         if (command[0] == '-') {
 350                 dev = NULL;
 351                 bond_for_each_slave(bond, slave, i)
 352                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 353                                 dev = slave->dev;
 354                                 break;
 355                         }
 356                 if (dev) {
 357                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 358                                 bond->dev->name, dev->name);
 359                         rtnl_lock();
 360                         res = bond_release(bond->dev, dev);
 361                         rtnl_unlock();
 362                         if (res) {
 363                                 ret = res;
 364                                 goto out;
 365                         }
 366                         /* set the slave MTU to the default */
 367                         if (dev->change_mtu) {
 368                                 dev->change_mtu(dev, 1500);
 369                         } else {
 370                                 dev->mtu = 1500;
 371                         }
 372                 }
 373                 else {
 374                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 375                                 ifname, bond->dev->name);
 376                         ret = -ENODEV;
 377                 }
 378                 goto out;
 379         }
 380
 381 err_no_cmd:
 382         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 383         ret = -EPERM;
 384
 385 out:
 386         return ret;
 387 }
 388
 389 static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 390
 391 /*
 392  * Show and set the bonding mode.  The bond interface must be down to
 393  * change the mode.
 394  */
 395 static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
 396 {
 397         struct bonding *bond = to_bond(cd);
 398
 399         return sprintf(buf, "%s %d\n",
 400                         bond_mode_tbl[bond->params.mode].modename,
 401                         bond->params.mode) + 1;
 402 }
 403
 404 static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
 405 {
 406         int new_value, ret = count;
 407         struct bonding *bond = to_bond(cd);
 408
 409         if (bond->dev->flags & IFF_UP) {
 410                 printk(KERN_ERR DRV_NAME
 411                        ": unable to update mode of %s because interface is up.\n",
 412                        bond->dev->name);
 413                 ret = -EPERM;
 414                 goto out;
 415         }
 416
 417         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 418         if (new_value < 0)  {
 419                 printk(KERN_ERR DRV_NAME
 420                        ": %s: Ignoring invalid mode value %.*s.\n",
 421                        bond->dev->name,
 422                        (int)strlen(buf) - 1, buf);
 423                 ret = -EINVAL;
 424                 goto out;
 425         } else {
 426                 if (bond->params.mode == BOND_MODE_8023AD)
 427                         bond_unset_master_3ad_flags(bond);
 428
 429                 if (bond->params.mode == BOND_MODE_ALB)
 430                         bond_unset_master_alb_flags(bond);
 431
 432                 bond->params.mode = new_value;
 433                 bond_set_mode_ops(bond, bond->params.mode);
 434                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 435                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 436         }
 437 out:
 438         return ret;
 439 }
 440 static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 441
 442 /*
 443  * Show and set the bonding transmit hash method.  The bond interface must be down to
 444  * change the xmit hash policy.
 445  */
 446 static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
 447 {
 448         int count;
 449         struct bonding *bond = to_bond(cd);
 450
 451         if ((bond->params.mode != BOND_MODE_XOR) &&
 452             (bond->params.mode != BOND_MODE_8023AD)) {
 453                 // Not Applicable
 454                 count = sprintf(buf, "NA\n") + 1;
 455         } else {
 456                 count = sprintf(buf, "%s %d\n",
 457                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 458                         bond->params.xmit_policy) + 1;
 459         }
 460
 461         return count;
 462 }
 463
 464 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
 465 {
 466         int new_value, ret = count;
 467         struct bonding *bond = to_bond(cd);
 468
 469         if (bond->dev->flags & IFF_UP) {
 470                 printk(KERN_ERR DRV_NAME
 471                        "%s: Interface is up. Unable to update xmit policy.\n",
 472                        bond->dev->name);
 473                 ret = -EPERM;
 474                 goto out;
 475         }
 476
 477         if ((bond->params.mode != BOND_MODE_XOR) &&
 478             (bond->params.mode != BOND_MODE_8023AD)) {
 479                 printk(KERN_ERR DRV_NAME
 480                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 481                        bond->dev->name);
 482                 ret = -EPERM;
 483                 goto out;
 484         }
 485
 486         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 487         if (new_value < 0)  {
 488                 printk(KERN_ERR DRV_NAME
 489                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 490                        bond->dev->name,
 491                        (int)strlen(buf) - 1, buf);
 492                 ret = -EINVAL;
 493                 goto out;
 494         } else {
 495                 bond->params.xmit_policy = new_value;
 496                 bond_set_mode_ops(bond, bond->params.mode);
 497                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 498                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 499         }
 500 out:
 501         return ret;
 502 }
 503 static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 504
 505 /*
 506  * Show and set the arp timer interval.  There are two tricky bits
 507  * here.  First, if ARP monitoring is activated, then we must disable
 508  * MII monitoring.  Second, if the ARP timer isn't running, we must
 509  * start it.
 510  */
 511 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
 512 {
 513         struct bonding *bond = to_bond(cd);
 514
 515         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 516 }
 517
 518 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
 519 {
 520         int new_value, ret = count;
 521         struct bonding *bond = to_bond(cd);
 522
 523         if (sscanf(buf, "%d", &new_value) != 1) {
 524                 printk(KERN_ERR DRV_NAME
 525                        ": %s: no arp_interval value specified.\n",
 526                        bond->dev->name);
 527                 ret = -EINVAL;
 528                 goto out;
 529         }
 530         if (new_value < 0) {
 531                 printk(KERN_ERR DRV_NAME
 532                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 533                        bond->dev->name, new_value, INT_MAX);
 534                 ret = -EINVAL;
 535                 goto out;
 536         }
 537
 538         printk(KERN_INFO DRV_NAME
 539                ": %s: Setting ARP monitoring interval to %d.\n",
 540                bond->dev->name, new_value);
 541         bond->params.arp_interval = new_value;
 542         if (bond->params.miimon) {
 543                 printk(KERN_INFO DRV_NAME
 544                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 545                        "%s Disabling MII monitoring.\n",
 546                        bond->dev->name, bond->dev->name);
 547                 bond->params.miimon = 0;
 548                 /* Kill MII timer, else it brings bond's link down */
 549                 if (bond->arp_timer.function) {
 550                         printk(KERN_INFO DRV_NAME
 551                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 552                        bond->dev->name);
 553                         del_timer_sync(&bond->mii_timer);
 554                 }
 555         }
 556         if (!bond->params.arp_targets[0]) {
 557                 printk(KERN_INFO DRV_NAME
 558                        ": %s: ARP monitoring has been set up, "
 559                        "but no ARP targets have been specified.\n",
 560                        bond->dev->name);
 561         }
 562         if (bond->dev->flags & IFF_UP) {
 563                 /* If the interface is up, we may need to fire off
 564                  * the ARP timer.  If the interface is down, the
 565                  * timer will get fired off when the open function
 566                  * is called.
 567                  */
 568                 if (bond->arp_timer.function) {
 569                         /* The timer's already set up, so fire it off */
 570                         mod_timer(&bond->arp_timer, jiffies + 1);
 571                 } else {
 572                         /* Set up the timer. */
 573                         init_timer(&bond->arp_timer);
 574                         bond->arp_timer.expires = jiffies + 1;
 575                         bond->arp_timer.data =
 576                                 (unsigned long) bond->dev;
 577                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 578                                 bond->arp_timer.function =
 579                                         (void *)
 580                                         &bond_activebackup_arp_mon;
 581                         } else {
 582                                 bond->arp_timer.function =
 583                                         (void *)
 584                                         &bond_loadbalance_arp_mon;
 585                         }
 586                         add_timer(&bond->arp_timer);
 587                 }
 588         }
 589
 590 out:
 591         return ret;
 592 }
 593 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 594
 595 /*
 596  * Show and set the arp targets.
 597  */
 598 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
 599 {
 600         int i, res = 0;
 601         struct bonding *bond = to_bond(cd);
 602
 603         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 604                 if (bond->params.arp_targets[i])
 605                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 606                                NIPQUAD(bond->params.arp_targets[i]));
 607         }
 608         if (res)
 609                 res--;  /* eat the leftover space */
 610         res += sprintf(buf + res, "\n");
 611         res++;
 612         return res;
 613 }
 614
 615 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
 616 {
 617         u32 newtarget;
 618         int i = 0, done = 0, ret = count;
 619         struct bonding *bond = to_bond(cd);
 620         u32 *targets;
 621
 622         targets = bond->params.arp_targets;
 623         newtarget = in_aton(buf + 1);
 624         /* look for adds */
 625         if (buf[0] == '+') {
 626                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 627                         printk(KERN_ERR DRV_NAME
 628                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 629                                bond->dev->name, NIPQUAD(newtarget));
 630                         ret = -EINVAL;
 631                         goto out;
 632                 }
 633                 /* look for an empty slot to put the target in, and check for dupes */
 634                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 635                         if (targets[i] == newtarget) { /* duplicate */
 636                                 printk(KERN_ERR DRV_NAME
 637                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 638                                        bond->dev->name, NIPQUAD(newtarget));
 639                                 if (done)
 640                                         targets[i] = 0;
 641                                 ret = -EINVAL;
 642                                 goto out;
 643                         }
 644                         if (targets[i] == 0 && !done) {
 645                                 printk(KERN_INFO DRV_NAME
 646                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 647                                        bond->dev->name, NIPQUAD(newtarget));
 648                                 done = 1;
 649                                 targets[i] = newtarget;
 650                         }
 651                 }
 652                 if (!done) {
 653                         printk(KERN_ERR DRV_NAME
 654                                ": %s: ARP target table is full!\n",
 655                                bond->dev->name);
 656                         ret = -EINVAL;
 657                         goto out;
 658                 }
 659
 660         }
 661         else if (buf[0] == '-') {
 662                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 663                         printk(KERN_ERR DRV_NAME
 664                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 665                                bond->dev->name, NIPQUAD(newtarget));
 666                         ret = -EINVAL;
 667                         goto out;
 668                 }
 669
 670                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 671                         if (targets[i] == newtarget) {
 672                                 printk(KERN_INFO DRV_NAME
 673                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 674                                        bond->dev->name, NIPQUAD(newtarget));
 675                                 targets[i] = 0;
 676                                 done = 1;
 677                         }
 678                 }
 679                 if (!done) {
 680                         printk(KERN_INFO DRV_NAME
 681                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 682                                bond->dev->name, NIPQUAD(newtarget));
 683                         ret = -EINVAL;
 684                         goto out;
 685                 }
 686         }
 687         else {
 688                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 689                         bond->dev->name);
 690                 ret = -EPERM;
 691                 goto out;
 692         }
 693
 694 out:
 695         return ret;
 696 }
 697 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 698
 699 /*
 700  * Show and set the up and down delays.  These must be multiples of the
 701  * MII monitoring value, and are stored internally as the multiplier.
 702  * Thus, we must translate to MS for the real world.
 703  */
 704 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
 705 {
 706         struct bonding *bond = to_bond(cd);
 707
 708         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 709 }
 710
 711 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
 712 {
 713         int new_value, ret = count;
 714         struct bonding *bond = to_bond(cd);
 715
 716         if (!(bond->params.miimon)) {
 717                 printk(KERN_ERR DRV_NAME
 718                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 719                        bond->dev->name);
 720                 ret = -EPERM;
 721                 goto out;
 722         }
 723
 724         if (sscanf(buf, "%d", &new_value) != 1) {
 725                 printk(KERN_ERR DRV_NAME
 726                        ": %s: no down delay value specified.\n",
 727                        bond->dev->name);
 728                 ret = -EINVAL;
 729                 goto out;
 730         }
 731         if (new_value < 0) {
 732                 printk(KERN_ERR DRV_NAME
 733                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 734                        bond->dev->name, new_value, 1, INT_MAX);
 735                 ret = -EINVAL;
 736                 goto out;
 737         } else {
 738                 if ((new_value % bond->params.miimon) != 0) {
 739                         printk(KERN_WARNING DRV_NAME
 740                                ": %s: Warning: down delay (%d) is not a multiple "
 741                                "of miimon (%d), delay rounded to %d ms\n",
 742                                bond->dev->name, new_value, bond->params.miimon,
 743                                (new_value / bond->params.miimon) *
 744                                bond->params.miimon);
 745                 }
 746                 bond->params.downdelay = new_value / bond->params.miimon;
 747                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 748                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 749
 750         }
 751
 752 out:
 753         return ret;
 754 }
 755 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 756
 757 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
 758 {
 759         struct bonding *bond = to_bond(cd);
 760
 761         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 762
 763 }
 764
 765 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
 766 {
 767         int new_value, ret = count;
 768         struct bonding *bond = to_bond(cd);
 769
 770         if (!(bond->params.miimon)) {
 771                 printk(KERN_ERR DRV_NAME
 772                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 773                        bond->dev->name);
 774                 ret = -EPERM;
 775                 goto out;
 776         }
 777
 778         if (sscanf(buf, "%d", &new_value) != 1) {
 779                 printk(KERN_ERR DRV_NAME
 780                        ": %s: no up delay value specified.\n",
 781                        bond->dev->name);
 782                 ret = -EINVAL;
 783                 goto out;
 784         }
 785         if (new_value < 0) {
 786                 printk(KERN_ERR DRV_NAME
 787                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 788                        bond->dev->name, new_value, 1, INT_MAX);
 789                 ret = -EINVAL;
 790                 goto out;
 791         } else {
 792                 if ((new_value % bond->params.miimon) != 0) {
 793                         printk(KERN_WARNING DRV_NAME
 794                                ": %s: Warning: up delay (%d) is not a multiple "
 795                                "of miimon (%d), updelay rounded to %d ms\n",
 796                                bond->dev->name, new_value, bond->params.miimon,
 797                                (new_value / bond->params.miimon) *
 798                                bond->params.miimon);
 799                 }
 800                 bond->params.updelay = new_value / bond->params.miimon;
 801                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 802                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 803
 804         }
 805
 806 out:
 807         return ret;
 808 }
 809 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 810
 811 /*
 812  * Show and set the LACP interval.  Interface must be down, and the mode
 813  * must be set to 802.3ad mode.
 814  */
 815 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
 816 {
 817         struct bonding *bond = to_bond(cd);
 818
 819         return sprintf(buf, "%s %d\n",
 820                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 821                 bond->params.lacp_fast) + 1;
 822 }
 823
 824 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
 825 {
 826         int new_value, ret = count;
 827         struct bonding *bond = to_bond(cd);
 828
 829         if (bond->dev->flags & IFF_UP) {
 830                 printk(KERN_ERR DRV_NAME
 831                        ": %s: Unable to update LACP rate because interface is up.\n",
 832                        bond->dev->name);
 833                 ret = -EPERM;
 834                 goto out;
 835         }
 836
 837         if (bond->params.mode != BOND_MODE_8023AD) {
 838                 printk(KERN_ERR DRV_NAME
 839                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 840                        bond->dev->name);
 841                 ret = -EPERM;
 842                 goto out;
 843         }
 844
 845         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 846
 847         if ((new_value == 1) || (new_value == 0)) {
 848                 bond->params.lacp_fast = new_value;
 849                 printk(KERN_INFO DRV_NAME
 850                        ": %s: Setting LACP rate to %s (%d).\n",
 851                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 852         } else {
 853                 printk(KERN_ERR DRV_NAME
 854                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 855                         bond->dev->name, (int)strlen(buf) - 1, buf);
 856                 ret = -EINVAL;
 857         }
 858 out:
 859         return ret;
 860 }
 861 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 862
 863 /*
 864  * Show and set the MII monitor interval.  There are two tricky bits
 865  * here.  First, if MII monitoring is activated, then we must disable
 866  * ARP monitoring.  Second, if the timer isn't running, we must
 867  * start it.
 868  */
 869 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
 870 {
 871         struct bonding *bond = to_bond(cd);
 872
 873         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 874 }
 875
 876 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
 877 {
 878         int new_value, ret = count;
 879         struct bonding *bond = to_bond(cd);
 880
 881         if (sscanf(buf, "%d", &new_value) != 1) {
 882                 printk(KERN_ERR DRV_NAME
 883                        ": %s: no miimon value specified.\n",
 884                        bond->dev->name);
 885                 ret = -EINVAL;
 886                 goto out;
 887         }
 888         if (new_value < 0) {
 889                 printk(KERN_ERR DRV_NAME
 890                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 891                        bond->dev->name, new_value, 1, INT_MAX);
 892                 ret = -EINVAL;
 893                 goto out;
 894         } else {
 895                 printk(KERN_INFO DRV_NAME
 896                        ": %s: Setting MII monitoring interval to %d.\n",
 897                        bond->dev->name, new_value);
 898                 bond->params.miimon = new_value;
 899                 if(bond->params.updelay)
 900                         printk(KERN_INFO DRV_NAME
 901                               ": %s: Note: Updating updelay (to %d) "
 902                               "since it is a multiple of the miimon value.\n",
 903                               bond->dev->name,
 904                               bond->params.updelay * bond->params.miimon);
 905                 if(bond->params.downdelay)
 906                         printk(KERN_INFO DRV_NAME
 907                               ": %s: Note: Updating downdelay (to %d) "
 908                               "since it is a multiple of the miimon value.\n",
 909                               bond->dev->name,
 910                               bond->params.downdelay * bond->params.miimon);
 911                 if (bond->params.arp_interval) {
 912                         printk(KERN_INFO DRV_NAME
 913                                ": %s: MII monitoring cannot be used with "
 914                                "ARP monitoring. Disabling ARP monitoring...\n",
 915                                bond->dev->name);
 916                         bond->params.arp_interval = 0;
 917                         /* Kill ARP timer, else it brings bond's link down */
 918                         if (bond->mii_timer.function) {
 919                                 printk(KERN_INFO DRV_NAME
 920                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
 921                                bond->dev->name);
 922                                 del_timer_sync(&bond->arp_timer);
 923                         }
 924                 }
 925
 926                 if (bond->dev->flags & IFF_UP) {
 927                         /* If the interface is up, we may need to fire off
 928                          * the MII timer. If the interface is down, the
 929                          * timer will get fired off when the open function
 930                          * is called.
 931                          */
 932                         if (bond->mii_timer.function) {
 933                                 /* The timer's already set up, so fire it off */
 934                                 mod_timer(&bond->mii_timer, jiffies + 1);
 935                         } else {
 936                                 /* Set up the timer. */
 937                                 init_timer(&bond->mii_timer);
 938                                 bond->mii_timer.expires = jiffies + 1;
 939                                 bond->mii_timer.data =
 940                                         (unsigned long) bond->dev;
 941                                 bond->mii_timer.function =
 942                                         (void *) &bond_mii_monitor;
 943                                 add_timer(&bond->mii_timer);
 944                         }
 945                 }
 946         }
 947 out:
 948         return ret;
 949 }
 950 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
 951
 952 /*
 953  * Show and set the primary slave.  The store function is much
 954  * simpler than bonding_store_slaves function because it only needs to
 955  * handle one interface name.
 956  * The bond must be a mode that supports a primary for this be
 957  * set.
 958  */
 959 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
 960 {
 961         int count = 0;
 962         struct bonding *bond = to_bond(cd);
 963
 964         if (bond->primary_slave)
 965                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
 966         else
 967                 count = sprintf(buf, "\n") + 1;
 968
 969         return count;
 970 }
 971
 972 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
 973 {
 974         int i;
 975         struct slave *slave;
 976         struct bonding *bond = to_bond(cd);
 977
 978         write_lock_bh(&bond->lock);
 979         if (!USES_PRIMARY(bond->params.mode)) {
 980                 printk(KERN_INFO DRV_NAME
 981                        ": %s: Unable to set primary slave; %s is in mode %d\n",
 982                        bond->dev->name, bond->dev->name, bond->params.mode);
 983         } else {
 984                 bond_for_each_slave(bond, slave, i) {
 985                         if (strnicmp
 986                             (slave->dev->name, buf,
 987                              strlen(slave->dev->name)) == 0) {
 988                                 printk(KERN_INFO DRV_NAME
 989                                        ": %s: Setting %s as primary slave.\n",
 990                                        bond->dev->name, slave->dev->name);
 991                                 bond->primary_slave = slave;
 992                                 bond_select_active_slave(bond);
 993                                 goto out;
 994                         }
 995                 }
 996
 997                 /* if we got here, then we didn't match the name of any slave */
 998
 999                 if (strlen(buf) == 0 || buf[0] == '\n') {
1000                         printk(KERN_INFO DRV_NAME
1001                                ": %s: Setting primary slave to None.\n",
1002                                bond->dev->name);
1003                         bond->primary_slave = NULL;
1004                                 bond_select_active_slave(bond);
1005                 } else {
1006                         printk(KERN_INFO DRV_NAME
1007                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1008                                bond->dev->name, (int)strlen(buf) - 1, buf);
1009                 }
1010         }
1011 out:
1012         write_unlock_bh(&bond->lock);
1013         return count;
1014 }
1015 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1016
1017 /*
1018  * Show and set the use_carrier flag.
1019  */
1020 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1021 {
1022         struct bonding *bond = to_bond(cd);
1023
1024         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1025 }
1026
1027 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1028 {
1029         int new_value, ret = count;
1030         struct bonding *bond = to_bond(cd);
1031
1032
1033         if (sscanf(buf, "%d", &new_value) != 1) {
1034                 printk(KERN_ERR DRV_NAME
1035                        ": %s: no use_carrier value specified.\n",
1036                        bond->dev->name);
1037                 ret = -EINVAL;
1038                 goto out;
1039         }
1040         if ((new_value == 0) || (new_value == 1)) {
1041                 bond->params.use_carrier = new_value;
1042                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1043                        bond->dev->name, new_value);
1044         } else {
1045                 printk(KERN_INFO DRV_NAME
1046                        ": %s: Ignoring invalid use_carrier value %d.\n",
1047                        bond->dev->name, new_value);
1048         }
1049 out:
1050         return count;
1051 }
1052 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1053
1054
1055 /*
1056  * Show and set currently active_slave.
1057  */
1058 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1059 {
1060         struct slave *curr;
1061         struct bonding *bond = to_bond(cd);
1062         int count;
1063
1064
1065         read_lock(&bond->curr_slave_lock);
1066         curr = bond->curr_active_slave;
1067         read_unlock(&bond->curr_slave_lock);
1068
1069         if (USES_PRIMARY(bond->params.mode) && curr)
1070                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1071         else
1072                 count = sprintf(buf, "\n") + 1;
1073         return count;
1074 }
1075
1076 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1077 {
1078         int i;
1079         struct slave *slave;
1080         struct slave *old_active = NULL;
1081         struct slave *new_active = NULL;
1082         struct bonding *bond = to_bond(cd);
1083
1084         write_lock_bh(&bond->lock);
1085         if (!USES_PRIMARY(bond->params.mode)) {
1086                 printk(KERN_INFO DRV_NAME
1087                        ": %s: Unable to change active slave; %s is in mode %d\n",
1088                        bond->dev->name, bond->dev->name, bond->params.mode);
1089         } else {
1090                 bond_for_each_slave(bond, slave, i) {
1091                         if (strnicmp
1092                             (slave->dev->name, buf,
1093                              strlen(slave->dev->name)) == 0) {
1094                                 old_active = bond->curr_active_slave;
1095                                 new_active = slave;
1096                                 if (new_active && (new_active == old_active)) {
1097                                         /* do nothing */
1098                                         printk(KERN_INFO DRV_NAME
1099                                                ": %s: %s is already the current active slave.\n",
1100                                                bond->dev->name, slave->dev->name);
1101                                         goto out;
1102                                 }
1103                                 else {
1104                                         if ((new_active) &&
1105                                             (old_active) &&
1106                                             (new_active->link == BOND_LINK_UP) &&
1107                                             IS_UP(new_active->dev)) {
1108                                                 printk(KERN_INFO DRV_NAME
1109                                                       ": %s: Setting %s as active slave.\n",
1110                                                       bond->dev->name, slave->dev->name);
1111                                                 bond_change_active_slave(bond, new_active);
1112                                         }
1113                                         else {
1114                                                 printk(KERN_INFO DRV_NAME
1115                                                       ": %s: Could not set %s as active slave; "
1116                                                       "either %s is down or the link is down.\n",
1117                                                       bond->dev->name, slave->dev->name,
1118                                                       slave->dev->name);
1119                                         }
1120                                         goto out;
1121                                 }
1122                         }
1123                 }
1124
1125                 /* if we got here, then we didn't match the name of any slave */
1126
1127                 if (strlen(buf) == 0 || buf[0] == '\n') {
1128                         printk(KERN_INFO DRV_NAME
1129                                ": %s: Setting active slave to None.\n",
1130                                bond->dev->name);
1131                         bond->primary_slave = NULL;
1132                                 bond_select_active_slave(bond);
1133                 } else {
1134                         printk(KERN_INFO DRV_NAME
1135                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1136                                bond->dev->name, (int)strlen(buf) - 1, buf);
1137                 }
1138         }
1139 out:
1140         write_unlock_bh(&bond->lock);
1141         return count;
1142
1143 }
1144 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1145
1146
1147 /*
1148  * Show link status of the bond interface.
1149  */
1150 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1151 {
1152         struct slave *curr;
1153         struct bonding *bond = to_bond(cd);
1154
1155         read_lock(&bond->curr_slave_lock);
1156         curr = bond->curr_active_slave;
1157         read_unlock(&bond->curr_slave_lock);
1158
1159         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1160 }
1161 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1162
1163
1164 /*
1165  * Show current 802.3ad aggregator ID.
1166  */
1167 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1168 {
1169         int count = 0;
1170         struct bonding *bond = to_bond(cd);
1171
1172         if (bond->params.mode == BOND_MODE_8023AD) {
1173                 struct ad_info ad_info;
1174                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1175         }
1176         else
1177                 count = sprintf(buf, "\n") + 1;
1178
1179         return count;
1180 }
1181 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1182
1183
1184 /*
1185  * Show number of active 802.3ad ports.
1186  */
1187 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1188 {
1189         int count = 0;
1190         struct bonding *bond = to_bond(cd);
1191
1192         if (bond->params.mode == BOND_MODE_8023AD) {
1193                 struct ad_info ad_info;
1194                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1195         }
1196         else
1197                 count = sprintf(buf, "\n") + 1;
1198
1199         return count;
1200 }
1201 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1202
1203
1204 /*
1205  * Show current 802.3ad actor key.
1206  */
1207 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1208 {
1209         int count = 0;
1210         struct bonding *bond = to_bond(cd);
1211
1212         if (bond->params.mode == BOND_MODE_8023AD) {
1213                 struct ad_info ad_info;
1214                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1215         }
1216         else
1217                 count = sprintf(buf, "\n") + 1;
1218
1219         return count;
1220 }
1221 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1222
1223
1224 /*
1225  * Show current 802.3ad partner key.
1226  */
1227 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1228 {
1229         int count = 0;
1230         struct bonding *bond = to_bond(cd);
1231
1232         if (bond->params.mode == BOND_MODE_8023AD) {
1233                 struct ad_info ad_info;
1234                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1235         }
1236         else
1237                 count = sprintf(buf, "\n") + 1;
1238
1239         return count;
1240 }
1241 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1242
1243
1244 /*
1245  * Show current 802.3ad partner mac.
1246  */
1247 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1248 {
1249         int count = 0;
1250         struct bonding *bond = to_bond(cd);
1251
1252         if (bond->params.mode == BOND_MODE_8023AD) {
1253                 struct ad_info ad_info;
1254                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1255                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1256                                        ad_info.partner_system[0],
1257                                        ad_info.partner_system[1],
1258                                        ad_info.partner_system[2],
1259                                        ad_info.partner_system[3],
1260                                        ad_info.partner_system[4],
1261                                        ad_info.partner_system[5]) + 1;
1262                 }
1263         }
1264         else
1265                 count = sprintf(buf, "\n") + 1;
1266
1267         return count;
1268 }
1269 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1270
1271
1272
1273 static struct attribute *per_bond_attrs[] = {
1274         &class_device_attr_slaves.attr,
1275         &class_device_attr_mode.attr,
1276         &class_device_attr_arp_interval.attr,
1277         &class_device_attr_arp_ip_target.attr,
1278         &class_device_attr_downdelay.attr,
1279         &class_device_attr_updelay.attr,
1280         &class_device_attr_lacp_rate.attr,
1281         &class_device_attr_xmit_hash_policy.attr,
1282         &class_device_attr_miimon.attr,
1283         &class_device_attr_primary.attr,
1284         &class_device_attr_use_carrier.attr,
1285         &class_device_attr_active_slave.attr,
1286         &class_device_attr_mii_status.attr,
1287         &class_device_attr_ad_aggregator.attr,
1288         &class_device_attr_ad_num_ports.attr,
1289         &class_device_attr_ad_actor_key.attr,
1290         &class_device_attr_ad_partner_key.attr,
1291         &class_device_attr_ad_partner_mac.attr,
1292         NULL,
1293 };
1294
1295 static struct attribute_group bonding_group = {
1296         .name = "bonding",
1297         .attrs = per_bond_attrs,
1298 };
1299
1300 /*
1301  * Initialize sysfs.  This sets up the bonding_masters file in
1302  * /sys/class/net.
1303  */
1304 int bond_create_sysfs(void)
1305 {
1306         int ret = 0;
1307         struct bonding *firstbond;
1308
1309         init_rwsem(&bonding_rwsem);
1310
1311         /* get the netdev class pointer */
1312         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1313         if (!firstbond)
1314                 return -ENODEV;
1315
1316         netdev_class = firstbond->dev->class_dev.class;
1317         if (!netdev_class)
1318                 return -ENODEV;
1319
1320         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1321
1322         return ret;
1323
1324 }
1325
1326 /*
1327  * Remove /sys/class/net/bonding_masters.
1328  */
1329 void bond_destroy_sysfs(void)
1330 {
1331         if (netdev_class)
1332                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1333 }
1334
1335 /*
1336  * Initialize sysfs for each bond.  This sets up and registers
1337  * the 'bondctl' directory for each individual bond under /sys/class/net.
1338  */
1339 int bond_create_sysfs_entry(struct bonding *bond)
1340 {
1341         struct net_device *dev = bond->dev;
1342         int err;
1343
1344         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1345         if (err) {
1346                 printk(KERN_EMERG "eek! didn't create group!\n");
1347         }
1348
1349         if (expected_refcount < 1)
1350                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1351
1352         return err;
1353 }
1354 /*
1355  * Remove sysfs entries for each bond.
1356  */
1357 void bond_destroy_sysfs_entry(struct bonding *bond)
1358 {
1359         struct net_device *dev = bond->dev;
1360
1361         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1362 }
1363