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/device.h>
  26 #include <linux/sysdev.h>
  27 #include <linux/fs.h>
  28 #include <linux/types.h>
  29 #include <linux/string.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/inetdevice.h>
  32 #include <linux/in.h>
  33 #include <linux/sysfs.h>
  34 #include <linux/ctype.h>
  35 #include <linux/inet.h>
  36 #include <linux/rtnetlink.h>
  37 #include <net/net_namespace.h>
  38
  39 /* #define BONDING_DEBUG 1 */
  40 #include "bonding.h"
  41 #define to_dev(obj)     container_of(obj,struct device,kobj)
  42 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  43
  44 /*---------------------------- Declarations -------------------------------*/
  45
  46
  47 extern struct list_head bond_dev_list;
  48 extern struct bond_params bonding_defaults;
  49 extern struct bond_parm_tbl bond_mode_tbl[];
  50 extern struct bond_parm_tbl bond_lacp_tbl[];
  51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  52 extern struct bond_parm_tbl arp_validate_tbl[];
  53
  54 static int expected_refcount = -1;
  55 static struct class *netdev_class;
  56 /*--------------------------- Data Structures -----------------------------*/
  57
  58 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
  59  * Because kobject_register tries to acquire the subsystem lock.  If
  60  * we already hold the lock (which we would if the user was creating
  61  * a new bond through the sysfs interface), we deadlock.
  62  * This lock is only needed when deleting a bond - we need to make sure
  63  * that we don't collide with an ongoing ioctl.
  64  */
  65
  66 struct rw_semaphore bonding_rwsem;
  67
  68
  69
  70
  71 /*------------------------------ Functions --------------------------------*/
  72
  73 /*
  74  * "show" function for the bond_masters attribute.
  75  * The class parameter is ignored.
  76  */
  77 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
  78 {
  79         int res = 0;
  80         struct bonding *bond;
  81
  82         down_read(&(bonding_rwsem));
  83
  84         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  85                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  86                         /* not enough space for another interface name */
  87                         if ((PAGE_SIZE - res) > 10)
  88                                 res = PAGE_SIZE - 10;
  89                         res += sprintf(buffer + res, "++more++ ");
  90                         break;
  91                 }
  92                 res += sprintf(buffer + res, "%s ",
  93                                bond->dev->name);
  94         }
  95         if (res) buffer[res-1] = '\n'; /* eat the leftover space */
  96         up_read(&(bonding_rwsem));
  97         return res;
  98 }
  99
 100 /*
 101  * "store" function for the bond_masters attribute.  This is what
 102  * creates and deletes entire bonds.
 103  *
 104  * The class parameter is ignored.
 105  *
 106  */
 107
 108 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 109 {
 110         char command[IFNAMSIZ + 1] = {0, };
 111         char *ifname;
 112         int res = count;
 113         struct bonding *bond;
 114         struct bonding *nxt;
 115
 116         down_write(&(bonding_rwsem));
 117         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 118         ifname = command + 1;
 119         if ((strlen(command) <= 1) ||
 120             !dev_valid_name(ifname))
 121                 goto err_no_cmd;
 122
 123         if (command[0] == '+') {
 124
 125                 /* Check to see if the bond already exists. */
 126                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 127                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 128                                 printk(KERN_ERR DRV_NAME
 129                                         ": cannot add bond %s; it already exists\n",
 130                                         ifname);
 131                                 res = -EPERM;
 132                                 goto out;
 133                         }
 134
 135                 printk(KERN_INFO DRV_NAME
 136                         ": %s is being created...\n", ifname);
 137                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 138                         printk(KERN_INFO DRV_NAME
 139                         ": %s interface already exists. Bond creation failed.\n",
 140                         ifname);
 141                         res = -EPERM;
 142                 }
 143                 goto out;
 144         }
 145
 146         if (command[0] == '-') {
 147                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 148                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 149                                 rtnl_lock();
 150                                 /* check the ref count on the bond's kobject.
 151                                  * If it's > expected, then there's a file open,
 152                                  * and we have to fail.
 153                                  */
 154                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 155                                                         > expected_refcount){
 156                                         rtnl_unlock();
 157                                         printk(KERN_INFO DRV_NAME
 158                                                 ": Unable remove bond %s due to open references.\n",
 159                                                 ifname);
 160                                         res = -EPERM;
 161                                         goto out;
 162                                 }
 163                                 printk(KERN_INFO DRV_NAME
 164                                         ": %s is being deleted...\n",
 165                                         bond->dev->name);
 166                                 bond_destroy(bond);
 167                                 rtnl_unlock();
 168                                 goto out;
 169                         }
 170
 171                 printk(KERN_ERR DRV_NAME
 172                         ": unable to delete non-existent bond %s\n", ifname);
 173                 res = -ENODEV;
 174                 goto out;
 175         }
 176
 177 err_no_cmd:
 178         printk(KERN_ERR DRV_NAME
 179                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 180         res = -EPERM;
 181
 182         /* Always return either count or an error.  If you return 0, you'll
 183          * get called forever, which is bad.
 184          */
 185 out:
 186         up_write(&(bonding_rwsem));
 187         return res;
 188 }
 189 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 190 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 191                   bonding_show_bonds, bonding_store_bonds);
 192
 193 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 194 {
 195         char linkname[IFNAMSIZ+7];
 196         int ret = 0;
 197
 198         /* first, create a link from the slave back to the master */
 199         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 200                                 "master");
 201         if (ret)
 202                 return ret;
 203         /* next, create a link from the master to the slave */
 204         sprintf(linkname,"slave_%s",slave->name);
 205         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 206                                 linkname);
 207         return ret;
 208
 209 }
 210
 211 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 212 {
 213         char linkname[IFNAMSIZ+7];
 214
 215         sysfs_remove_link(&(slave->dev.kobj), "master");
 216         sprintf(linkname,"slave_%s",slave->name);
 217         sysfs_remove_link(&(master->dev.kobj), linkname);
 218 }
 219
 220
 221 /*
 222  * Show the slaves in the current bond.
 223  */
 224 static ssize_t bonding_show_slaves(struct device *d,
 225                                    struct device_attribute *attr, char *buf)
 226 {
 227         struct slave *slave;
 228         int i, res = 0;
 229         struct bonding *bond = to_bond(d);
 230
 231         read_lock(&bond->lock);
 232         bond_for_each_slave(bond, slave, i) {
 233                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 234                         /* not enough space for another interface name */
 235                         if ((PAGE_SIZE - res) > 10)
 236                                 res = PAGE_SIZE - 10;
 237                         res += sprintf(buf + res, "++more++ ");
 238                         break;
 239                 }
 240                 res += sprintf(buf + res, "%s ", slave->dev->name);
 241         }
 242         read_unlock(&bond->lock);
 243         if (res) buf[res-1] = '\n'; /* eat the leftover space */
 244         return res;
 245 }
 246
 247 /*
 248  * Set the slaves in the current bond.  The bond interface must be
 249  * up for this to succeed.
 250  * This function is largely the same flow as bonding_update_bonds().
 251  */
 252 static ssize_t bonding_store_slaves(struct device *d,
 253                                     struct device_attribute *attr,
 254                                     const char *buffer, size_t count)
 255 {
 256         char command[IFNAMSIZ + 1] = { 0, };
 257         char *ifname;
 258         int i, res, found, ret = count;
 259         u32 original_mtu;
 260         struct slave *slave;
 261         struct net_device *dev = NULL;
 262         struct bonding *bond = to_bond(d);
 263
 264         /* Quick sanity check -- is the bond interface up? */
 265         if (!(bond->dev->flags & IFF_UP)) {
 266                 printk(KERN_WARNING DRV_NAME
 267                        ": %s: doing slave updates when interface is down.\n",
 268                        bond->dev->name);
 269         }
 270
 271         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 272
 273         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 274         ifname = command + 1;
 275         if ((strlen(command) <= 1) ||
 276             !dev_valid_name(ifname))
 277                 goto err_no_cmd;
 278
 279         if (command[0] == '+') {
 280
 281                 /* Got a slave name in ifname.  Is it already in the list? */
 282                 found = 0;
 283                 read_lock(&bond->lock);
 284                 bond_for_each_slave(bond, slave, i)
 285                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 286                                 printk(KERN_ERR DRV_NAME
 287                                        ": %s: Interface %s is already enslaved!\n",
 288                                        bond->dev->name, ifname);
 289                                 ret = -EPERM;
 290                                 read_unlock(&bond->lock);
 291                                 goto out;
 292                         }
 293
 294                 read_unlock(&bond->lock);
 295                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 296                        bond->dev->name, ifname);
 297                 dev = dev_get_by_name(&init_net, ifname);
 298                 if (!dev) {
 299                         printk(KERN_INFO DRV_NAME
 300                                ": %s: Interface %s does not exist!\n",
 301                                bond->dev->name, ifname);
 302                         ret = -EPERM;
 303                         goto out;
 304                 }
 305                 else
 306                         dev_put(dev);
 307
 308                 if (dev->flags & IFF_UP) {
 309                         printk(KERN_ERR DRV_NAME
 310                                ": %s: Error: Unable to enslave %s "
 311                                "because it is already up.\n",
 312                                bond->dev->name, dev->name);
 313                         ret = -EPERM;
 314                         goto out;
 315                 }
 316                 /* If this is the first slave, then we need to set
 317                    the master's hardware address to be the same as the
 318                    slave's. */
 319                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 320                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 321                                dev->addr_len);
 322                 }
 323
 324                 /* Set the slave's MTU to match the bond */
 325                 original_mtu = dev->mtu;
 326                 if (dev->mtu != bond->dev->mtu) {
 327                         if (dev->change_mtu) {
 328                                 res = dev->change_mtu(dev,
 329                                                       bond->dev->mtu);
 330                                 if (res) {
 331                                         ret = res;
 332                                         goto out;
 333                                 }
 334                         } else {
 335                                 dev->mtu = bond->dev->mtu;
 336                         }
 337                 }
 338                 rtnl_lock();
 339                 res = bond_enslave(bond->dev, dev);
 340                 bond_for_each_slave(bond, slave, i)
 341                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 342                                 slave->original_mtu = original_mtu;
 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                                 original_mtu = slave->original_mtu;
 356                                 break;
 357                         }
 358                 if (dev) {
 359                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 360                                 bond->dev->name, dev->name);
 361                         rtnl_lock();
 362                         if (bond->setup_by_slave)
 363                                 res = bond_release_and_destroy(bond->dev, dev);
 364                         else
 365                                 res = bond_release(bond->dev, dev);
 366                         rtnl_unlock();
 367                         if (res) {
 368                                 ret = res;
 369                                 goto out;
 370                         }
 371                         /* set the slave MTU to the default */
 372                         if (dev->change_mtu) {
 373                                 dev->change_mtu(dev, original_mtu);
 374                         } else {
 375                                 dev->mtu = original_mtu;
 376                         }
 377                 }
 378                 else {
 379                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 380                                 ifname, bond->dev->name);
 381                         ret = -ENODEV;
 382                 }
 383                 goto out;
 384         }
 385
 386 err_no_cmd:
 387         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 388         ret = -EPERM;
 389
 390 out:
 391         return ret;
 392 }
 393
 394 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 395
 396 /*
 397  * Show and set the bonding mode.  The bond interface must be down to
 398  * change the mode.
 399  */
 400 static ssize_t bonding_show_mode(struct device *d,
 401                                  struct device_attribute *attr, char *buf)
 402 {
 403         struct bonding *bond = to_bond(d);
 404
 405         return sprintf(buf, "%s %d\n",
 406                         bond_mode_tbl[bond->params.mode].modename,
 407                         bond->params.mode);
 408 }
 409
 410 static ssize_t bonding_store_mode(struct device *d,
 411                                   struct device_attribute *attr,
 412                                   const char *buf, size_t count)
 413 {
 414         int new_value, ret = count;
 415         struct bonding *bond = to_bond(d);
 416
 417         if (bond->dev->flags & IFF_UP) {
 418                 printk(KERN_ERR DRV_NAME
 419                        ": unable to update mode of %s because interface is up.\n",
 420                        bond->dev->name);
 421                 ret = -EPERM;
 422                 goto out;
 423         }
 424
 425         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 426         if (new_value < 0)  {
 427                 printk(KERN_ERR DRV_NAME
 428                        ": %s: Ignoring invalid mode value %.*s.\n",
 429                        bond->dev->name,
 430                        (int)strlen(buf) - 1, buf);
 431                 ret = -EINVAL;
 432                 goto out;
 433         } else {
 434                 if (bond->params.mode == BOND_MODE_8023AD)
 435                         bond_unset_master_3ad_flags(bond);
 436
 437                 if (bond->params.mode == BOND_MODE_ALB)
 438                         bond_unset_master_alb_flags(bond);
 439
 440                 bond->params.mode = new_value;
 441                 bond_set_mode_ops(bond, bond->params.mode);
 442                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 443                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 444         }
 445 out:
 446         return ret;
 447 }
 448 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 449
 450 /*
 451  * Show and set the bonding transmit hash method.  The bond interface must be down to
 452  * change the xmit hash policy.
 453  */
 454 static ssize_t bonding_show_xmit_hash(struct device *d,
 455                                       struct device_attribute *attr,
 456                                       char *buf)
 457 {
 458         int count;
 459         struct bonding *bond = to_bond(d);
 460
 461         if ((bond->params.mode != BOND_MODE_XOR) &&
 462             (bond->params.mode != BOND_MODE_8023AD)) {
 463                 // Not Applicable
 464                 count = sprintf(buf, "NA\n");
 465         } else {
 466                 count = sprintf(buf, "%s %d\n",
 467                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 468                         bond->params.xmit_policy);
 469         }
 470
 471         return count;
 472 }
 473
 474 static ssize_t bonding_store_xmit_hash(struct device *d,
 475                                        struct device_attribute *attr,
 476                                        const char *buf, size_t count)
 477 {
 478         int new_value, ret = count;
 479         struct bonding *bond = to_bond(d);
 480
 481         if (bond->dev->flags & IFF_UP) {
 482                 printk(KERN_ERR DRV_NAME
 483                        "%s: Interface is up. Unable to update xmit policy.\n",
 484                        bond->dev->name);
 485                 ret = -EPERM;
 486                 goto out;
 487         }
 488
 489         if ((bond->params.mode != BOND_MODE_XOR) &&
 490             (bond->params.mode != BOND_MODE_8023AD)) {
 491                 printk(KERN_ERR DRV_NAME
 492                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 493                        bond->dev->name);
 494                 ret = -EPERM;
 495                 goto out;
 496         }
 497
 498         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 499         if (new_value < 0)  {
 500                 printk(KERN_ERR DRV_NAME
 501                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 502                        bond->dev->name,
 503                        (int)strlen(buf) - 1, buf);
 504                 ret = -EINVAL;
 505                 goto out;
 506         } else {
 507                 bond->params.xmit_policy = new_value;
 508                 bond_set_mode_ops(bond, bond->params.mode);
 509                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 510                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 511         }
 512 out:
 513         return ret;
 514 }
 515 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 516
 517 /*
 518  * Show and set arp_validate.
 519  */
 520 static ssize_t bonding_show_arp_validate(struct device *d,
 521                                          struct device_attribute *attr,
 522                                          char *buf)
 523 {
 524         struct bonding *bond = to_bond(d);
 525
 526         return sprintf(buf, "%s %d\n",
 527                        arp_validate_tbl[bond->params.arp_validate].modename,
 528                        bond->params.arp_validate);
 529 }
 530
 531 static ssize_t bonding_store_arp_validate(struct device *d,
 532                                           struct device_attribute *attr,
 533                                           const char *buf, size_t count)
 534 {
 535         int new_value;
 536         struct bonding *bond = to_bond(d);
 537
 538         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
 539         if (new_value < 0) {
 540                 printk(KERN_ERR DRV_NAME
 541                        ": %s: Ignoring invalid arp_validate value %s\n",
 542                        bond->dev->name, buf);
 543                 return -EINVAL;
 544         }
 545         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 546                 printk(KERN_ERR DRV_NAME
 547                        ": %s: arp_validate only supported in active-backup mode.\n",
 548                        bond->dev->name);
 549                 return -EINVAL;
 550         }
 551         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 552                bond->dev->name, arp_validate_tbl[new_value].modename,
 553                new_value);
 554
 555         if (!bond->params.arp_validate && new_value) {
 556                 bond_register_arp(bond);
 557         } else if (bond->params.arp_validate && !new_value) {
 558                 bond_unregister_arp(bond);
 559         }
 560
 561         bond->params.arp_validate = new_value;
 562
 563         return count;
 564 }
 565
 566 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 567
 568 /*
 569  * Show and store fail_over_mac.  User only allowed to change the
 570  * value when there are no slaves.
 571  */
 572 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 573 {
 574         struct bonding *bond = to_bond(d);
 575
 576         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
 577 }
 578
 579 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 580 {
 581         int new_value;
 582         int ret = count;
 583         struct bonding *bond = to_bond(d);
 584
 585         if (bond->slave_cnt != 0) {
 586                 printk(KERN_ERR DRV_NAME
 587                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 588                        bond->dev->name);
 589                 ret = -EPERM;
 590                 goto out;
 591         }
 592
 593         if (sscanf(buf, "%d", &new_value) != 1) {
 594                 printk(KERN_ERR DRV_NAME
 595                        ": %s: no fail_over_mac value specified.\n",
 596                        bond->dev->name);
 597                 ret = -EINVAL;
 598                 goto out;
 599         }
 600
 601         if ((new_value == 0) || (new_value == 1)) {
 602                 bond->params.fail_over_mac = new_value;
 603                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
 604                        bond->dev->name, new_value);
 605         } else {
 606                 printk(KERN_INFO DRV_NAME
 607                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
 608                        bond->dev->name, new_value);
 609         }
 610 out:
 611         return ret;
 612 }
 613
 614 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 615
 616 /*
 617  * Show and set the arp timer interval.  There are two tricky bits
 618  * here.  First, if ARP monitoring is activated, then we must disable
 619  * MII monitoring.  Second, if the ARP timer isn't running, we must
 620  * start it.
 621  */
 622 static ssize_t bonding_show_arp_interval(struct device *d,
 623                                          struct device_attribute *attr,
 624                                          char *buf)
 625 {
 626         struct bonding *bond = to_bond(d);
 627
 628         return sprintf(buf, "%d\n", bond->params.arp_interval);
 629 }
 630
 631 static ssize_t bonding_store_arp_interval(struct device *d,
 632                                           struct device_attribute *attr,
 633                                           const char *buf, size_t count)
 634 {
 635         int new_value, ret = count;
 636         struct bonding *bond = to_bond(d);
 637
 638         if (sscanf(buf, "%d", &new_value) != 1) {
 639                 printk(KERN_ERR DRV_NAME
 640                        ": %s: no arp_interval value specified.\n",
 641                        bond->dev->name);
 642                 ret = -EINVAL;
 643                 goto out;
 644         }
 645         if (new_value < 0) {
 646                 printk(KERN_ERR DRV_NAME
 647                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 648                        bond->dev->name, new_value, INT_MAX);
 649                 ret = -EINVAL;
 650                 goto out;
 651         }
 652
 653         printk(KERN_INFO DRV_NAME
 654                ": %s: Setting ARP monitoring interval to %d.\n",
 655                bond->dev->name, new_value);
 656         bond->params.arp_interval = new_value;
 657         if (bond->params.miimon) {
 658                 printk(KERN_INFO DRV_NAME
 659                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 660                        "%s Disabling MII monitoring.\n",
 661                        bond->dev->name, bond->dev->name);
 662                 bond->params.miimon = 0;
 663                 if (delayed_work_pending(&bond->mii_work)) {
 664                         cancel_delayed_work(&bond->mii_work);
 665                         flush_workqueue(bond->wq);
 666                 }
 667         }
 668         if (!bond->params.arp_targets[0]) {
 669                 printk(KERN_INFO DRV_NAME
 670                        ": %s: ARP monitoring has been set up, "
 671                        "but no ARP targets have been specified.\n",
 672                        bond->dev->name);
 673         }
 674         if (bond->dev->flags & IFF_UP) {
 675                 /* If the interface is up, we may need to fire off
 676                  * the ARP timer.  If the interface is down, the
 677                  * timer will get fired off when the open function
 678                  * is called.
 679                  */
 680                 if (!delayed_work_pending(&bond->arp_work)) {
 681                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 682                                 INIT_DELAYED_WORK(&bond->arp_work,
 683                                                   bond_activebackup_arp_mon);
 684                         else
 685                                 INIT_DELAYED_WORK(&bond->arp_work,
 686                                                   bond_loadbalance_arp_mon);
 687
 688                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 689                 }
 690         }
 691
 692 out:
 693         return ret;
 694 }
 695 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 696
 697 /*
 698  * Show and set the arp targets.
 699  */
 700 static ssize_t bonding_show_arp_targets(struct device *d,
 701                                         struct device_attribute *attr,
 702                                         char *buf)
 703 {
 704         int i, res = 0;
 705         struct bonding *bond = to_bond(d);
 706
 707         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 708                 if (bond->params.arp_targets[i])
 709                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 710                                NIPQUAD(bond->params.arp_targets[i]));
 711         }
 712         if (res) buf[res-1] = '\n'; /* eat the leftover space */
 713         return res;
 714 }
 715
 716 static ssize_t bonding_store_arp_targets(struct device *d,
 717                                          struct device_attribute *attr,
 718                                          const char *buf, size_t count)
 719 {
 720         __be32 newtarget;
 721         int i = 0, done = 0, ret = count;
 722         struct bonding *bond = to_bond(d);
 723         __be32 *targets;
 724
 725         targets = bond->params.arp_targets;
 726         newtarget = in_aton(buf + 1);
 727         /* look for adds */
 728         if (buf[0] == '+') {
 729                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 730                         printk(KERN_ERR DRV_NAME
 731                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 732                                bond->dev->name, NIPQUAD(newtarget));
 733                         ret = -EINVAL;
 734                         goto out;
 735                 }
 736                 /* look for an empty slot to put the target in, and check for dupes */
 737                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 738                         if (targets[i] == newtarget) { /* duplicate */
 739                                 printk(KERN_ERR DRV_NAME
 740                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 741                                        bond->dev->name, NIPQUAD(newtarget));
 742                                 if (done)
 743                                         targets[i] = 0;
 744                                 ret = -EINVAL;
 745                                 goto out;
 746                         }
 747                         if (targets[i] == 0 && !done) {
 748                                 printk(KERN_INFO DRV_NAME
 749                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 750                                        bond->dev->name, NIPQUAD(newtarget));
 751                                 done = 1;
 752                                 targets[i] = newtarget;
 753                         }
 754                 }
 755                 if (!done) {
 756                         printk(KERN_ERR DRV_NAME
 757                                ": %s: ARP target table is full!\n",
 758                                bond->dev->name);
 759                         ret = -EINVAL;
 760                         goto out;
 761                 }
 762
 763         }
 764         else if (buf[0] == '-') {
 765                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 766                         printk(KERN_ERR DRV_NAME
 767                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 768                                bond->dev->name, NIPQUAD(newtarget));
 769                         ret = -EINVAL;
 770                         goto out;
 771                 }
 772
 773                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 774                         if (targets[i] == newtarget) {
 775                                 printk(KERN_INFO DRV_NAME
 776                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 777                                        bond->dev->name, NIPQUAD(newtarget));
 778                                 targets[i] = 0;
 779                                 done = 1;
 780                         }
 781                 }
 782                 if (!done) {
 783                         printk(KERN_INFO DRV_NAME
 784                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 785                                bond->dev->name, NIPQUAD(newtarget));
 786                         ret = -EINVAL;
 787                         goto out;
 788                 }
 789         }
 790         else {
 791                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 792                         bond->dev->name);
 793                 ret = -EPERM;
 794                 goto out;
 795         }
 796
 797 out:
 798         return ret;
 799 }
 800 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 801
 802 /*
 803  * Show and set the up and down delays.  These must be multiples of the
 804  * MII monitoring value, and are stored internally as the multiplier.
 805  * Thus, we must translate to MS for the real world.
 806  */
 807 static ssize_t bonding_show_downdelay(struct device *d,
 808                                       struct device_attribute *attr,
 809                                       char *buf)
 810 {
 811         struct bonding *bond = to_bond(d);
 812
 813         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 814 }
 815
 816 static ssize_t bonding_store_downdelay(struct device *d,
 817                                        struct device_attribute *attr,
 818                                        const char *buf, size_t count)
 819 {
 820         int new_value, ret = count;
 821         struct bonding *bond = to_bond(d);
 822
 823         if (!(bond->params.miimon)) {
 824                 printk(KERN_ERR DRV_NAME
 825                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 826                        bond->dev->name);
 827                 ret = -EPERM;
 828                 goto out;
 829         }
 830
 831         if (sscanf(buf, "%d", &new_value) != 1) {
 832                 printk(KERN_ERR DRV_NAME
 833                        ": %s: no down delay value specified.\n",
 834                        bond->dev->name);
 835                 ret = -EINVAL;
 836                 goto out;
 837         }
 838         if (new_value < 0) {
 839                 printk(KERN_ERR DRV_NAME
 840                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 841                        bond->dev->name, new_value, 1, INT_MAX);
 842                 ret = -EINVAL;
 843                 goto out;
 844         } else {
 845                 if ((new_value % bond->params.miimon) != 0) {
 846                         printk(KERN_WARNING DRV_NAME
 847                                ": %s: Warning: down delay (%d) is not a multiple "
 848                                "of miimon (%d), delay rounded to %d ms\n",
 849                                bond->dev->name, new_value, bond->params.miimon,
 850                                (new_value / bond->params.miimon) *
 851                                bond->params.miimon);
 852                 }
 853                 bond->params.downdelay = new_value / bond->params.miimon;
 854                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 855                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 856
 857         }
 858
 859 out:
 860         return ret;
 861 }
 862 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 863
 864 static ssize_t bonding_show_updelay(struct device *d,
 865                                     struct device_attribute *attr,
 866                                     char *buf)
 867 {
 868         struct bonding *bond = to_bond(d);
 869
 870         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 871
 872 }
 873
 874 static ssize_t bonding_store_updelay(struct device *d,
 875                                      struct device_attribute *attr,
 876                                      const char *buf, size_t count)
 877 {
 878         int new_value, ret = count;
 879         struct bonding *bond = to_bond(d);
 880
 881         if (!(bond->params.miimon)) {
 882                 printk(KERN_ERR DRV_NAME
 883                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 884                        bond->dev->name);
 885                 ret = -EPERM;
 886                 goto out;
 887         }
 888
 889         if (sscanf(buf, "%d", &new_value) != 1) {
 890                 printk(KERN_ERR DRV_NAME
 891                        ": %s: no up delay value specified.\n",
 892                        bond->dev->name);
 893                 ret = -EINVAL;
 894                 goto out;
 895         }
 896         if (new_value < 0) {
 897                 printk(KERN_ERR DRV_NAME
 898                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 899                        bond->dev->name, new_value, 1, INT_MAX);
 900                 ret = -EINVAL;
 901                 goto out;
 902         } else {
 903                 if ((new_value % bond->params.miimon) != 0) {
 904                         printk(KERN_WARNING DRV_NAME
 905                                ": %s: Warning: up delay (%d) is not a multiple "
 906                                "of miimon (%d), updelay rounded to %d ms\n",
 907                                bond->dev->name, new_value, bond->params.miimon,
 908                                (new_value / bond->params.miimon) *
 909                                bond->params.miimon);
 910                 }
 911                 bond->params.updelay = new_value / bond->params.miimon;
 912                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 913                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 914
 915         }
 916
 917 out:
 918         return ret;
 919 }
 920 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 921
 922 /*
 923  * Show and set the LACP interval.  Interface must be down, and the mode
 924  * must be set to 802.3ad mode.
 925  */
 926 static ssize_t bonding_show_lacp(struct device *d,
 927                                  struct device_attribute *attr,
 928                                  char *buf)
 929 {
 930         struct bonding *bond = to_bond(d);
 931
 932         return sprintf(buf, "%s %d\n",
 933                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 934                 bond->params.lacp_fast);
 935 }
 936
 937 static ssize_t bonding_store_lacp(struct device *d,
 938                                   struct device_attribute *attr,
 939                                   const char *buf, size_t count)
 940 {
 941         int new_value, ret = count;
 942         struct bonding *bond = to_bond(d);
 943
 944         if (bond->dev->flags & IFF_UP) {
 945                 printk(KERN_ERR DRV_NAME
 946                        ": %s: Unable to update LACP rate because interface is up.\n",
 947                        bond->dev->name);
 948                 ret = -EPERM;
 949                 goto out;
 950         }
 951
 952         if (bond->params.mode != BOND_MODE_8023AD) {
 953                 printk(KERN_ERR DRV_NAME
 954                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 955                        bond->dev->name);
 956                 ret = -EPERM;
 957                 goto out;
 958         }
 959
 960         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 961
 962         if ((new_value == 1) || (new_value == 0)) {
 963                 bond->params.lacp_fast = new_value;
 964                 printk(KERN_INFO DRV_NAME
 965                        ": %s: Setting LACP rate to %s (%d).\n",
 966                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 967         } else {
 968                 printk(KERN_ERR DRV_NAME
 969                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 970                         bond->dev->name, (int)strlen(buf) - 1, buf);
 971                 ret = -EINVAL;
 972         }
 973 out:
 974         return ret;
 975 }
 976 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 977
 978 /*
 979  * Show and set the MII monitor interval.  There are two tricky bits
 980  * here.  First, if MII monitoring is activated, then we must disable
 981  * ARP monitoring.  Second, if the timer isn't running, we must
 982  * start it.
 983  */
 984 static ssize_t bonding_show_miimon(struct device *d,
 985                                    struct device_attribute *attr,
 986                                    char *buf)
 987 {
 988         struct bonding *bond = to_bond(d);
 989
 990         return sprintf(buf, "%d\n", bond->params.miimon);
 991 }
 992
 993 static ssize_t bonding_store_miimon(struct device *d,
 994                                     struct device_attribute *attr,
 995                                     const char *buf, size_t count)
 996 {
 997         int new_value, ret = count;
 998         struct bonding *bond = to_bond(d);
 999
1000         if (sscanf(buf, "%d", &new_value) != 1) {
1001                 printk(KERN_ERR DRV_NAME
1002                        ": %s: no miimon value specified.\n",
1003                        bond->dev->name);
1004                 ret = -EINVAL;
1005                 goto out;
1006         }
1007         if (new_value < 0) {
1008                 printk(KERN_ERR DRV_NAME
1009                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1010                        bond->dev->name, new_value, 1, INT_MAX);
1011                 ret = -EINVAL;
1012                 goto out;
1013         } else {
1014                 printk(KERN_INFO DRV_NAME
1015                        ": %s: Setting MII monitoring interval to %d.\n",
1016                        bond->dev->name, new_value);
1017                 bond->params.miimon = new_value;
1018                 if(bond->params.updelay)
1019                         printk(KERN_INFO DRV_NAME
1020                               ": %s: Note: Updating updelay (to %d) "
1021                               "since it is a multiple of the miimon value.\n",
1022                               bond->dev->name,
1023                               bond->params.updelay * bond->params.miimon);
1024                 if(bond->params.downdelay)
1025                         printk(KERN_INFO DRV_NAME
1026                               ": %s: Note: Updating downdelay (to %d) "
1027                               "since it is a multiple of the miimon value.\n",
1028                               bond->dev->name,
1029                               bond->params.downdelay * bond->params.miimon);
1030                 if (bond->params.arp_interval) {
1031                         printk(KERN_INFO DRV_NAME
1032                                ": %s: MII monitoring cannot be used with "
1033                                "ARP monitoring. Disabling ARP monitoring...\n",
1034                                bond->dev->name);
1035                         bond->params.arp_interval = 0;
1036                         if (bond->params.arp_validate) {
1037                                 bond_unregister_arp(bond);
1038                                 bond->params.arp_validate =
1039                                         BOND_ARP_VALIDATE_NONE;
1040                         }
1041                         if (delayed_work_pending(&bond->arp_work)) {
1042                                 cancel_delayed_work(&bond->arp_work);
1043                                 flush_workqueue(bond->wq);
1044                         }
1045                 }
1046
1047                 if (bond->dev->flags & IFF_UP) {
1048                         /* If the interface is up, we may need to fire off
1049                          * the MII timer. If the interface is down, the
1050                          * timer will get fired off when the open function
1051                          * is called.
1052                          */
1053                         if (!delayed_work_pending(&bond->mii_work)) {
1054                                 INIT_DELAYED_WORK(&bond->mii_work,
1055                                                   bond_mii_monitor);
1056                                 queue_delayed_work(bond->wq,
1057                                                    &bond->mii_work, 0);
1058                         }
1059                 }
1060         }
1061 out:
1062         return ret;
1063 }
1064 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1065
1066 /*
1067  * Show and set the primary slave.  The store function is much
1068  * simpler than bonding_store_slaves function because it only needs to
1069  * handle one interface name.
1070  * The bond must be a mode that supports a primary for this be
1071  * set.
1072  */
1073 static ssize_t bonding_show_primary(struct device *d,
1074                                     struct device_attribute *attr,
1075                                     char *buf)
1076 {
1077         int count = 0;
1078         struct bonding *bond = to_bond(d);
1079
1080         if (bond->primary_slave)
1081                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1082         else
1083                 count = sprintf(buf, "\n");
1084
1085         return count;
1086 }
1087
1088 static ssize_t bonding_store_primary(struct device *d,
1089                                      struct device_attribute *attr,
1090                                      const char *buf, size_t count)
1091 {
1092         int i;
1093         struct slave *slave;
1094         struct bonding *bond = to_bond(d);
1095
1096         write_lock_bh(&bond->lock);
1097         if (!USES_PRIMARY(bond->params.mode)) {
1098                 printk(KERN_INFO DRV_NAME
1099                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1100                        bond->dev->name, bond->dev->name, bond->params.mode);
1101         } else {
1102                 bond_for_each_slave(bond, slave, i) {
1103                         if (strnicmp
1104                             (slave->dev->name, buf,
1105                              strlen(slave->dev->name)) == 0) {
1106                                 printk(KERN_INFO DRV_NAME
1107                                        ": %s: Setting %s as primary slave.\n",
1108                                        bond->dev->name, slave->dev->name);
1109                                 bond->primary_slave = slave;
1110                                 bond_select_active_slave(bond);
1111                                 goto out;
1112                         }
1113                 }
1114
1115                 /* if we got here, then we didn't match the name of any slave */
1116
1117                 if (strlen(buf) == 0 || buf[0] == '\n') {
1118                         printk(KERN_INFO DRV_NAME
1119                                ": %s: Setting primary slave to None.\n",
1120                                bond->dev->name);
1121                         bond->primary_slave = NULL;
1122                                 bond_select_active_slave(bond);
1123                 } else {
1124                         printk(KERN_INFO DRV_NAME
1125                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1126                                bond->dev->name, (int)strlen(buf) - 1, buf);
1127                 }
1128         }
1129 out:
1130         write_unlock_bh(&bond->lock);
1131
1132         rtnl_unlock();
1133
1134         return count;
1135 }
1136 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1137
1138 /*
1139  * Show and set the use_carrier flag.
1140  */
1141 static ssize_t bonding_show_carrier(struct device *d,
1142                                     struct device_attribute *attr,
1143                                     char *buf)
1144 {
1145         struct bonding *bond = to_bond(d);
1146
1147         return sprintf(buf, "%d\n", bond->params.use_carrier);
1148 }
1149
1150 static ssize_t bonding_store_carrier(struct device *d,
1151                                      struct device_attribute *attr,
1152                                      const char *buf, size_t count)
1153 {
1154         int new_value, ret = count;
1155         struct bonding *bond = to_bond(d);
1156
1157
1158         if (sscanf(buf, "%d", &new_value) != 1) {
1159                 printk(KERN_ERR DRV_NAME
1160                        ": %s: no use_carrier value specified.\n",
1161                        bond->dev->name);
1162                 ret = -EINVAL;
1163                 goto out;
1164         }
1165         if ((new_value == 0) || (new_value == 1)) {
1166                 bond->params.use_carrier = new_value;
1167                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1168                        bond->dev->name, new_value);
1169         } else {
1170                 printk(KERN_INFO DRV_NAME
1171                        ": %s: Ignoring invalid use_carrier value %d.\n",
1172                        bond->dev->name, new_value);
1173         }
1174 out:
1175         return count;
1176 }
1177 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1178
1179
1180 /*
1181  * Show and set currently active_slave.
1182  */
1183 static ssize_t bonding_show_active_slave(struct device *d,
1184                                          struct device_attribute *attr,
1185                                          char *buf)
1186 {
1187         struct slave *curr;
1188         struct bonding *bond = to_bond(d);
1189         int count;
1190
1191         read_lock(&bond->curr_slave_lock);
1192         curr = bond->curr_active_slave;
1193         read_unlock(&bond->curr_slave_lock);
1194
1195         if (USES_PRIMARY(bond->params.mode) && curr)
1196                 count = sprintf(buf, "%s\n", curr->dev->name);
1197         else
1198                 count = sprintf(buf, "\n");
1199         return count;
1200 }
1201
1202 static ssize_t bonding_store_active_slave(struct device *d,
1203                                           struct device_attribute *attr,
1204                                           const char *buf, size_t count)
1205 {
1206         int i;
1207         struct slave *slave;
1208         struct slave *old_active = NULL;
1209         struct slave *new_active = NULL;
1210         struct bonding *bond = to_bond(d);
1211
1212         rtnl_lock();
1213         write_lock_bh(&bond->lock);
1214
1215         if (!USES_PRIMARY(bond->params.mode)) {
1216                 printk(KERN_INFO DRV_NAME
1217                        ": %s: Unable to change active slave; %s is in mode %d\n",
1218                        bond->dev->name, bond->dev->name, bond->params.mode);
1219         } else {
1220                 bond_for_each_slave(bond, slave, i) {
1221                         if (strnicmp
1222                             (slave->dev->name, buf,
1223                              strlen(slave->dev->name)) == 0) {
1224                                 old_active = bond->curr_active_slave;
1225                                 new_active = slave;
1226                                 if (new_active == old_active) {
1227                                         /* do nothing */
1228                                         printk(KERN_INFO DRV_NAME
1229                                                ": %s: %s is already the current active slave.\n",
1230                                                bond->dev->name, slave->dev->name);
1231                                         goto out;
1232                                 }
1233                                 else {
1234                                         if ((new_active) &&
1235                                             (old_active) &&
1236                                             (new_active->link == BOND_LINK_UP) &&
1237                                             IS_UP(new_active->dev)) {
1238                                                 printk(KERN_INFO DRV_NAME
1239                                                       ": %s: Setting %s as active slave.\n",
1240                                                       bond->dev->name, slave->dev->name);
1241                                                 bond_change_active_slave(bond, new_active);
1242                                         }
1243                                         else {
1244                                                 printk(KERN_INFO DRV_NAME
1245                                                       ": %s: Could not set %s as active slave; "
1246                                                       "either %s is down or the link is down.\n",
1247                                                       bond->dev->name, slave->dev->name,
1248                                                       slave->dev->name);
1249                                         }
1250                                         goto out;
1251                                 }
1252                         }
1253                 }
1254
1255                 /* if we got here, then we didn't match the name of any slave */
1256
1257                 if (strlen(buf) == 0 || buf[0] == '\n') {
1258                         printk(KERN_INFO DRV_NAME
1259                                ": %s: Setting active slave to None.\n",
1260                                bond->dev->name);
1261                         bond->primary_slave = NULL;
1262                                 bond_select_active_slave(bond);
1263                 } else {
1264                         printk(KERN_INFO DRV_NAME
1265                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1266                                bond->dev->name, (int)strlen(buf) - 1, buf);
1267                 }
1268         }
1269 out:
1270         write_unlock_bh(&bond->lock);
1271         rtnl_unlock();
1272
1273         return count;
1274
1275 }
1276 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1277
1278
1279 /*
1280  * Show link status of the bond interface.
1281  */
1282 static ssize_t bonding_show_mii_status(struct device *d,
1283                                        struct device_attribute *attr,
1284                                        char *buf)
1285 {
1286         struct slave *curr;
1287         struct bonding *bond = to_bond(d);
1288
1289         read_lock(&bond->curr_slave_lock);
1290         curr = bond->curr_active_slave;
1291         read_unlock(&bond->curr_slave_lock);
1292
1293         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1294 }
1295 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1296
1297
1298 /*
1299  * Show current 802.3ad aggregator ID.
1300  */
1301 static ssize_t bonding_show_ad_aggregator(struct device *d,
1302                                           struct device_attribute *attr,
1303                                           char *buf)
1304 {
1305         int count = 0;
1306         struct bonding *bond = to_bond(d);
1307
1308         if (bond->params.mode == BOND_MODE_8023AD) {
1309                 struct ad_info ad_info;
1310                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1311         }
1312         else
1313                 count = sprintf(buf, "\n");
1314
1315         return count;
1316 }
1317 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1318
1319
1320 /*
1321  * Show number of active 802.3ad ports.
1322  */
1323 static ssize_t bonding_show_ad_num_ports(struct device *d,
1324                                          struct device_attribute *attr,
1325                                          char *buf)
1326 {
1327         int count = 0;
1328         struct bonding *bond = to_bond(d);
1329
1330         if (bond->params.mode == BOND_MODE_8023AD) {
1331                 struct ad_info ad_info;
1332                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1333         }
1334         else
1335                 count = sprintf(buf, "\n");
1336
1337         return count;
1338 }
1339 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1340
1341
1342 /*
1343  * Show current 802.3ad actor key.
1344  */
1345 static ssize_t bonding_show_ad_actor_key(struct device *d,
1346                                          struct device_attribute *attr,
1347                                          char *buf)
1348 {
1349         int count = 0;
1350         struct bonding *bond = to_bond(d);
1351
1352         if (bond->params.mode == BOND_MODE_8023AD) {
1353                 struct ad_info ad_info;
1354                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1355         }
1356         else
1357                 count = sprintf(buf, "\n");
1358
1359         return count;
1360 }
1361 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1362
1363
1364 /*
1365  * Show current 802.3ad partner key.
1366  */
1367 static ssize_t bonding_show_ad_partner_key(struct device *d,
1368                                            struct device_attribute *attr,
1369                                            char *buf)
1370 {
1371         int count = 0;
1372         struct bonding *bond = to_bond(d);
1373
1374         if (bond->params.mode == BOND_MODE_8023AD) {
1375                 struct ad_info ad_info;
1376                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1377         }
1378         else
1379                 count = sprintf(buf, "\n");
1380
1381         return count;
1382 }
1383 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1384
1385
1386 /*
1387  * Show current 802.3ad partner mac.
1388  */
1389 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1390                                            struct device_attribute *attr,
1391                                            char *buf)
1392 {
1393         int count = 0;
1394         struct bonding *bond = to_bond(d);
1395         DECLARE_MAC_BUF(mac);
1396
1397         if (bond->params.mode == BOND_MODE_8023AD) {
1398                 struct ad_info ad_info;
1399                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1400                         count = sprintf(buf,"%s\n",
1401                                         print_mac(mac, ad_info.partner_system));
1402                 }
1403         }
1404         else
1405                 count = sprintf(buf, "\n");
1406
1407         return count;
1408 }
1409 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1410
1411
1412
1413 static struct attribute *per_bond_attrs[] = {
1414         &dev_attr_slaves.attr,
1415         &dev_attr_mode.attr,
1416         &dev_attr_fail_over_mac.attr,
1417         &dev_attr_arp_validate.attr,
1418         &dev_attr_arp_interval.attr,
1419         &dev_attr_arp_ip_target.attr,
1420         &dev_attr_downdelay.attr,
1421         &dev_attr_updelay.attr,
1422         &dev_attr_lacp_rate.attr,
1423         &dev_attr_xmit_hash_policy.attr,
1424         &dev_attr_miimon.attr,
1425         &dev_attr_primary.attr,
1426         &dev_attr_use_carrier.attr,
1427         &dev_attr_active_slave.attr,
1428         &dev_attr_mii_status.attr,
1429         &dev_attr_ad_aggregator.attr,
1430         &dev_attr_ad_num_ports.attr,
1431         &dev_attr_ad_actor_key.attr,
1432         &dev_attr_ad_partner_key.attr,
1433         &dev_attr_ad_partner_mac.attr,
1434         NULL,
1435 };
1436
1437 static struct attribute_group bonding_group = {
1438         .name = "bonding",
1439         .attrs = per_bond_attrs,
1440 };
1441
1442 /*
1443  * Initialize sysfs.  This sets up the bonding_masters file in
1444  * /sys/class/net.
1445  */
1446 int bond_create_sysfs(void)
1447 {
1448         int ret = 0;
1449         struct bonding *firstbond;
1450
1451         init_rwsem(&bonding_rwsem);
1452
1453         /* get the netdev class pointer */
1454         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1455         if (!firstbond)
1456                 return -ENODEV;
1457
1458         netdev_class = firstbond->dev->dev.class;
1459         if (!netdev_class)
1460                 return -ENODEV;
1461
1462         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1463         /*
1464          * Permit multiple loads of the module by ignoring failures to
1465          * create the bonding_masters sysfs file.  Bonding devices
1466          * created by second or subsequent loads of the module will
1467          * not be listed in, or controllable by, bonding_masters, but
1468          * will have the usual "bonding" sysfs directory.
1469          *
1470          * This is done to preserve backwards compatibility for
1471          * initscripts/sysconfig, which load bonding multiple times to
1472          * configure multiple bonding devices.
1473          */
1474         if (ret == -EEXIST) {
1475                 netdev_class = NULL;
1476                 return 0;
1477         }
1478
1479         return ret;
1480
1481 }
1482
1483 /*
1484  * Remove /sys/class/net/bonding_masters.
1485  */
1486 void bond_destroy_sysfs(void)
1487 {
1488         if (netdev_class)
1489                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1490 }
1491
1492 /*
1493  * Initialize sysfs for each bond.  This sets up and registers
1494  * the 'bondctl' directory for each individual bond under /sys/class/net.
1495  */
1496 int bond_create_sysfs_entry(struct bonding *bond)
1497 {
1498         struct net_device *dev = bond->dev;
1499         int err;
1500
1501         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1502         if (err) {
1503                 printk(KERN_EMERG "eek! didn't create group!\n");
1504         }
1505
1506         if (expected_refcount < 1)
1507                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1508
1509         return err;
1510 }
1511 /*
1512  * Remove sysfs entries for each bond.
1513  */
1514 void bond_destroy_sysfs_entry(struct bonding *bond)
1515 {
1516         struct net_device *dev = bond->dev;
1517
1518         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1519 }
1520