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

   1
   2 /*
   3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  */
  23 #include <linux/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 *buf)
  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(buf + res, "++more++ ");
  90                         break;
  91                 }
  92                 res += sprintf(buf + res, "%s ", bond->dev->name);
  93         }
  94         if (res)
  95                 buf[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 rv, res = count;
 113         struct bonding *bond;
 114         struct bonding *nxt;
 115
 116         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 117         ifname = command + 1;
 118         if ((strlen(command) <= 1) ||
 119             !dev_valid_name(ifname))
 120                 goto err_no_cmd;
 121
 122         if (command[0] == '+') {
 123                 printk(KERN_INFO DRV_NAME
 124                         ": %s is being created...\n", ifname);
 125                 rv = bond_create(ifname, &bonding_defaults, &bond);
 126                 if (rv) {
 127                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
 128                         res = rv;
 129                 }
 130                 goto out;
 131         }
 132
 133         if (command[0] == '-') {
 134                 rtnl_lock();
 135                 down_write(&bonding_rwsem);
 136
 137                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 138                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 139                                 /* check the ref count on the bond's kobject.
 140                                  * If it's > expected, then there's a file open,
 141                                  * and we have to fail.
 142                                  */
 143                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 144                                                         > expected_refcount){
 145                                         printk(KERN_INFO DRV_NAME
 146                                                 ": Unable remove bond %s due to open references.\n",
 147                                                 ifname);
 148                                         res = -EPERM;
 149                                         goto out_unlock;
 150                                 }
 151                                 printk(KERN_INFO DRV_NAME
 152                                         ": %s is being deleted...\n",
 153                                         bond->dev->name);
 154                                 bond_destroy(bond);
 155                                 goto out_unlock;
 156                         }
 157
 158                 printk(KERN_ERR DRV_NAME
 159                         ": unable to delete non-existent bond %s\n", ifname);
 160                 res = -ENODEV;
 161                 goto out_unlock;
 162         }
 163
 164 err_no_cmd:
 165         printk(KERN_ERR DRV_NAME
 166                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 167         return -EPERM;
 168
 169 out_unlock:
 170         up_write(&bonding_rwsem);
 171         rtnl_unlock();
 172
 173         /* Always return either count or an error.  If you return 0, you'll
 174          * get called forever, which is bad.
 175          */
 176 out:
 177         return res;
 178 }
 179 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 180 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 181                   bonding_show_bonds, bonding_store_bonds);
 182
 183 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 184 {
 185         char linkname[IFNAMSIZ+7];
 186         int ret = 0;
 187
 188         /* first, create a link from the slave back to the master */
 189         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 190                                 "master");
 191         if (ret)
 192                 return ret;
 193         /* next, create a link from the master to the slave */
 194         sprintf(linkname,"slave_%s",slave->name);
 195         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 196                                 linkname);
 197         return ret;
 198
 199 }
 200
 201 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 202 {
 203         char linkname[IFNAMSIZ+7];
 204
 205         sysfs_remove_link(&(slave->dev.kobj), "master");
 206         sprintf(linkname,"slave_%s",slave->name);
 207         sysfs_remove_link(&(master->dev.kobj), linkname);
 208 }
 209
 210
 211 /*
 212  * Show the slaves in the current bond.
 213  */
 214 static ssize_t bonding_show_slaves(struct device *d,
 215                                    struct device_attribute *attr, char *buf)
 216 {
 217         struct slave *slave;
 218         int i, res = 0;
 219         struct bonding *bond = to_bond(d);
 220
 221         read_lock(&bond->lock);
 222         bond_for_each_slave(bond, slave, i) {
 223                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 224                         /* not enough space for another interface name */
 225                         if ((PAGE_SIZE - res) > 10)
 226                                 res = PAGE_SIZE - 10;
 227                         res += sprintf(buf + res, "++more++ ");
 228                         break;
 229                 }
 230                 res += sprintf(buf + res, "%s ", slave->dev->name);
 231         }
 232         read_unlock(&bond->lock);
 233         if (res)
 234                 buf[res-1] = '\n'; /* eat the leftover space */
 235         return res;
 236 }
 237
 238 /*
 239  * Set the slaves in the current bond.  The bond interface must be
 240  * up for this to succeed.
 241  * This function is largely the same flow as bonding_update_bonds().
 242  */
 243 static ssize_t bonding_store_slaves(struct device *d,
 244                                     struct device_attribute *attr,
 245                                     const char *buffer, size_t count)
 246 {
 247         char command[IFNAMSIZ + 1] = { 0, };
 248         char *ifname;
 249         int i, res, found, ret = count;
 250         u32 original_mtu;
 251         struct slave *slave;
 252         struct net_device *dev = NULL;
 253         struct bonding *bond = to_bond(d);
 254
 255         /* Quick sanity check -- is the bond interface up? */
 256         if (!(bond->dev->flags & IFF_UP)) {
 257                 printk(KERN_WARNING DRV_NAME
 258                        ": %s: doing slave updates when interface is down.\n",
 259                        bond->dev->name);
 260         }
 261
 262         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 263
 264         rtnl_lock();
 265         down_write(&(bonding_rwsem));
 266
 267         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 268         ifname = command + 1;
 269         if ((strlen(command) <= 1) ||
 270             !dev_valid_name(ifname))
 271                 goto err_no_cmd;
 272
 273         if (command[0] == '+') {
 274
 275                 /* Got a slave name in ifname.  Is it already in the list? */
 276                 found = 0;
 277                 read_lock(&bond->lock);
 278                 bond_for_each_slave(bond, slave, i)
 279                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 280                                 printk(KERN_ERR DRV_NAME
 281                                        ": %s: Interface %s is already enslaved!\n",
 282                                        bond->dev->name, ifname);
 283                                 ret = -EPERM;
 284                                 read_unlock(&bond->lock);
 285                                 goto out;
 286                         }
 287
 288                 read_unlock(&bond->lock);
 289                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 290                        bond->dev->name, ifname);
 291                 dev = dev_get_by_name(&init_net, ifname);
 292                 if (!dev) {
 293                         printk(KERN_INFO DRV_NAME
 294                                ": %s: Interface %s does not exist!\n",
 295                                bond->dev->name, ifname);
 296                         ret = -EPERM;
 297                         goto out;
 298                 }
 299                 else
 300                         dev_put(dev);
 301
 302                 if (dev->flags & IFF_UP) {
 303                         printk(KERN_ERR DRV_NAME
 304                                ": %s: Error: Unable to enslave %s "
 305                                "because it is already up.\n",
 306                                bond->dev->name, dev->name);
 307                         ret = -EPERM;
 308                         goto out;
 309                 }
 310                 /* If this is the first slave, then we need to set
 311                    the master's hardware address to be the same as the
 312                    slave's. */
 313                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 314                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 315                                dev->addr_len);
 316                 }
 317
 318                 /* Set the slave's MTU to match the bond */
 319                 original_mtu = dev->mtu;
 320                 if (dev->mtu != bond->dev->mtu) {
 321                         if (dev->change_mtu) {
 322                                 res = dev->change_mtu(dev,
 323                                                       bond->dev->mtu);
 324                                 if (res) {
 325                                         ret = res;
 326                                         goto out;
 327                                 }
 328                         } else {
 329                                 dev->mtu = bond->dev->mtu;
 330                         }
 331                 }
 332                 res = bond_enslave(bond->dev, dev);
 333                 bond_for_each_slave(bond, slave, i)
 334                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
 335                                 slave->original_mtu = original_mtu;
 336                 if (res) {
 337                         ret = res;
 338                 }
 339                 goto out;
 340         }
 341
 342         if (command[0] == '-') {
 343                 dev = NULL;
 344                 original_mtu = 0;
 345                 bond_for_each_slave(bond, slave, i)
 346                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 347                                 dev = slave->dev;
 348                                 original_mtu = slave->original_mtu;
 349                                 break;
 350                         }
 351                 if (dev) {
 352                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 353                                 bond->dev->name, dev->name);
 354                         if (bond->setup_by_slave)
 355                                 res = bond_release_and_destroy(bond->dev, dev);
 356                         else
 357                                 res = bond_release(bond->dev, dev);
 358                         if (res) {
 359                                 ret = res;
 360                                 goto out;
 361                         }
 362                         /* set the slave MTU to the default */
 363                         if (dev->change_mtu) {
 364                                 dev->change_mtu(dev, original_mtu);
 365                         } else {
 366                                 dev->mtu = original_mtu;
 367                         }
 368                 }
 369                 else {
 370                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 371                                 ifname, bond->dev->name);
 372                         ret = -ENODEV;
 373                 }
 374                 goto out;
 375         }
 376
 377 err_no_cmd:
 378         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 379         ret = -EPERM;
 380
 381 out:
 382         up_write(&(bonding_rwsem));
 383         rtnl_unlock();
 384         return ret;
 385 }
 386
 387 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 388
 389 /*
 390  * Show and set the bonding mode.  The bond interface must be down to
 391  * change the mode.
 392  */
 393 static ssize_t bonding_show_mode(struct device *d,
 394                                  struct device_attribute *attr, char *buf)
 395 {
 396         struct bonding *bond = to_bond(d);
 397
 398         return sprintf(buf, "%s %d\n",
 399                         bond_mode_tbl[bond->params.mode].modename,
 400                         bond->params.mode);
 401 }
 402
 403 static ssize_t bonding_store_mode(struct device *d,
 404                                   struct device_attribute *attr,
 405                                   const char *buf, size_t count)
 406 {
 407         int new_value, ret = count;
 408         struct bonding *bond = to_bond(d);
 409
 410         if (bond->dev->flags & IFF_UP) {
 411                 printk(KERN_ERR DRV_NAME
 412                        ": unable to update mode of %s because interface is up.\n",
 413                        bond->dev->name);
 414                 ret = -EPERM;
 415                 goto out;
 416         }
 417
 418         new_value = bond_parse_parm(buf, bond_mode_tbl);
 419         if (new_value < 0)  {
 420                 printk(KERN_ERR DRV_NAME
 421                        ": %s: Ignoring invalid mode value %.*s.\n",
 422                        bond->dev->name,
 423                        (int)strlen(buf) - 1, buf);
 424                 ret = -EINVAL;
 425                 goto out;
 426         } else {
 427                 if (bond->params.mode == BOND_MODE_8023AD)
 428                         bond_unset_master_3ad_flags(bond);
 429
 430                 if (bond->params.mode == BOND_MODE_ALB)
 431                         bond_unset_master_alb_flags(bond);
 432
 433                 bond->params.mode = new_value;
 434                 bond_set_mode_ops(bond, bond->params.mode);
 435                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 436                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 437         }
 438 out:
 439         return ret;
 440 }
 441 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 442
 443 /*
 444  * Show and set the bonding transmit hash method.  The bond interface must be down to
 445  * change the xmit hash policy.
 446  */
 447 static ssize_t bonding_show_xmit_hash(struct device *d,
 448                                       struct device_attribute *attr,
 449                                       char *buf)
 450 {
 451         struct bonding *bond = to_bond(d);
 452
 453         return sprintf(buf, "%s %d\n",
 454                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 455                        bond->params.xmit_policy);
 456 }
 457
 458 static ssize_t bonding_store_xmit_hash(struct device *d,
 459                                        struct device_attribute *attr,
 460                                        const char *buf, size_t count)
 461 {
 462         int new_value, ret = count;
 463         struct bonding *bond = to_bond(d);
 464
 465         if (bond->dev->flags & IFF_UP) {
 466                 printk(KERN_ERR DRV_NAME
 467                        "%s: Interface is up. Unable to update xmit policy.\n",
 468                        bond->dev->name);
 469                 ret = -EPERM;
 470                 goto out;
 471         }
 472
 473         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
 474         if (new_value < 0)  {
 475                 printk(KERN_ERR DRV_NAME
 476                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 477                        bond->dev->name,
 478                        (int)strlen(buf) - 1, buf);
 479                 ret = -EINVAL;
 480                 goto out;
 481         } else {
 482                 bond->params.xmit_policy = new_value;
 483                 bond_set_mode_ops(bond, bond->params.mode);
 484                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 485                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 486         }
 487 out:
 488         return ret;
 489 }
 490 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 491
 492 /*
 493  * Show and set arp_validate.
 494  */
 495 static ssize_t bonding_show_arp_validate(struct device *d,
 496                                          struct device_attribute *attr,
 497                                          char *buf)
 498 {
 499         struct bonding *bond = to_bond(d);
 500
 501         return sprintf(buf, "%s %d\n",
 502                        arp_validate_tbl[bond->params.arp_validate].modename,
 503                        bond->params.arp_validate);
 504 }
 505
 506 static ssize_t bonding_store_arp_validate(struct device *d,
 507                                           struct device_attribute *attr,
 508                                           const char *buf, size_t count)
 509 {
 510         int new_value;
 511         struct bonding *bond = to_bond(d);
 512
 513         new_value = bond_parse_parm(buf, arp_validate_tbl);
 514         if (new_value < 0) {
 515                 printk(KERN_ERR DRV_NAME
 516                        ": %s: Ignoring invalid arp_validate value %s\n",
 517                        bond->dev->name, buf);
 518                 return -EINVAL;
 519         }
 520         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 521                 printk(KERN_ERR DRV_NAME
 522                        ": %s: arp_validate only supported in active-backup mode.\n",
 523                        bond->dev->name);
 524                 return -EINVAL;
 525         }
 526         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 527                bond->dev->name, arp_validate_tbl[new_value].modename,
 528                new_value);
 529
 530         if (!bond->params.arp_validate && new_value) {
 531                 bond_register_arp(bond);
 532         } else if (bond->params.arp_validate && !new_value) {
 533                 bond_unregister_arp(bond);
 534         }
 535
 536         bond->params.arp_validate = new_value;
 537
 538         return count;
 539 }
 540
 541 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 542
 543 /*
 544  * Show and store fail_over_mac.  User only allowed to change the
 545  * value when there are no slaves.
 546  */
 547 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
 548 {
 549         struct bonding *bond = to_bond(d);
 550
 551         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
 552 }
 553
 554 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
 555 {
 556         int new_value;
 557         int ret = count;
 558         struct bonding *bond = to_bond(d);
 559
 560         if (bond->slave_cnt != 0) {
 561                 printk(KERN_ERR DRV_NAME
 562                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
 563                        bond->dev->name);
 564                 ret = -EPERM;
 565                 goto out;
 566         }
 567
 568         if (sscanf(buf, "%d", &new_value) != 1) {
 569                 printk(KERN_ERR DRV_NAME
 570                        ": %s: no fail_over_mac value specified.\n",
 571                        bond->dev->name);
 572                 ret = -EINVAL;
 573                 goto out;
 574         }
 575
 576         if ((new_value == 0) || (new_value == 1)) {
 577                 bond->params.fail_over_mac = new_value;
 578                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
 579                        bond->dev->name, new_value);
 580         } else {
 581                 printk(KERN_INFO DRV_NAME
 582                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
 583                        bond->dev->name, new_value);
 584         }
 585 out:
 586         return ret;
 587 }
 588
 589 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
 590
 591 /*
 592  * Show and set the arp timer interval.  There are two tricky bits
 593  * here.  First, if ARP monitoring is activated, then we must disable
 594  * MII monitoring.  Second, if the ARP timer isn't running, we must
 595  * start it.
 596  */
 597 static ssize_t bonding_show_arp_interval(struct device *d,
 598                                          struct device_attribute *attr,
 599                                          char *buf)
 600 {
 601         struct bonding *bond = to_bond(d);
 602
 603         return sprintf(buf, "%d\n", bond->params.arp_interval);
 604 }
 605
 606 static ssize_t bonding_store_arp_interval(struct device *d,
 607                                           struct device_attribute *attr,
 608                                           const char *buf, size_t count)
 609 {
 610         int new_value, ret = count;
 611         struct bonding *bond = to_bond(d);
 612
 613         if (sscanf(buf, "%d", &new_value) != 1) {
 614                 printk(KERN_ERR DRV_NAME
 615                        ": %s: no arp_interval value specified.\n",
 616                        bond->dev->name);
 617                 ret = -EINVAL;
 618                 goto out;
 619         }
 620         if (new_value < 0) {
 621                 printk(KERN_ERR DRV_NAME
 622                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 623                        bond->dev->name, new_value, INT_MAX);
 624                 ret = -EINVAL;
 625                 goto out;
 626         }
 627
 628         printk(KERN_INFO DRV_NAME
 629                ": %s: Setting ARP monitoring interval to %d.\n",
 630                bond->dev->name, new_value);
 631         bond->params.arp_interval = new_value;
 632         if (bond->params.miimon) {
 633                 printk(KERN_INFO DRV_NAME
 634                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 635                        "%s Disabling MII monitoring.\n",
 636                        bond->dev->name, bond->dev->name);
 637                 bond->params.miimon = 0;
 638                 if (delayed_work_pending(&bond->mii_work)) {
 639                         cancel_delayed_work(&bond->mii_work);
 640                         flush_workqueue(bond->wq);
 641                 }
 642         }
 643         if (!bond->params.arp_targets[0]) {
 644                 printk(KERN_INFO DRV_NAME
 645                        ": %s: ARP monitoring has been set up, "
 646                        "but no ARP targets have been specified.\n",
 647                        bond->dev->name);
 648         }
 649         if (bond->dev->flags & IFF_UP) {
 650                 /* If the interface is up, we may need to fire off
 651                  * the ARP timer.  If the interface is down, the
 652                  * timer will get fired off when the open function
 653                  * is called.
 654                  */
 655                 if (!delayed_work_pending(&bond->arp_work)) {
 656                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
 657                                 INIT_DELAYED_WORK(&bond->arp_work,
 658                                                   bond_activebackup_arp_mon);
 659                         else
 660                                 INIT_DELAYED_WORK(&bond->arp_work,
 661                                                   bond_loadbalance_arp_mon);
 662
 663                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
 664                 }
 665         }
 666
 667 out:
 668         return ret;
 669 }
 670 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 671
 672 /*
 673  * Show and set the arp targets.
 674  */
 675 static ssize_t bonding_show_arp_targets(struct device *d,
 676                                         struct device_attribute *attr,
 677                                         char *buf)
 678 {
 679         int i, res = 0;
 680         struct bonding *bond = to_bond(d);
 681
 682         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 683                 if (bond->params.arp_targets[i])
 684                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 685                                NIPQUAD(bond->params.arp_targets[i]));
 686         }
 687         if (res)
 688                 buf[res-1] = '\n'; /* eat the leftover space */
 689         return res;
 690 }
 691
 692 static ssize_t bonding_store_arp_targets(struct device *d,
 693                                          struct device_attribute *attr,
 694                                          const char *buf, size_t count)
 695 {
 696         __be32 newtarget;
 697         int i = 0, done = 0, ret = count;
 698         struct bonding *bond = to_bond(d);
 699         __be32 *targets;
 700
 701         targets = bond->params.arp_targets;
 702         newtarget = in_aton(buf + 1);
 703         /* look for adds */
 704         if (buf[0] == '+') {
 705                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 706                         printk(KERN_ERR DRV_NAME
 707                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 708                                bond->dev->name, NIPQUAD(newtarget));
 709                         ret = -EINVAL;
 710                         goto out;
 711                 }
 712                 /* look for an empty slot to put the target in, and check for dupes */
 713                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 714                         if (targets[i] == newtarget) { /* duplicate */
 715                                 printk(KERN_ERR DRV_NAME
 716                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 717                                        bond->dev->name, NIPQUAD(newtarget));
 718                                 if (done)
 719                                         targets[i] = 0;
 720                                 ret = -EINVAL;
 721                                 goto out;
 722                         }
 723                         if (targets[i] == 0 && !done) {
 724                                 printk(KERN_INFO DRV_NAME
 725                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 726                                        bond->dev->name, NIPQUAD(newtarget));
 727                                 done = 1;
 728                                 targets[i] = newtarget;
 729                         }
 730                 }
 731                 if (!done) {
 732                         printk(KERN_ERR DRV_NAME
 733                                ": %s: ARP target table is full!\n",
 734                                bond->dev->name);
 735                         ret = -EINVAL;
 736                         goto out;
 737                 }
 738
 739         }
 740         else if (buf[0] == '-') {
 741                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
 742                         printk(KERN_ERR DRV_NAME
 743                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 744                                bond->dev->name, NIPQUAD(newtarget));
 745                         ret = -EINVAL;
 746                         goto out;
 747                 }
 748
 749                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 750                         if (targets[i] == newtarget) {
 751                                 printk(KERN_INFO DRV_NAME
 752                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 753                                        bond->dev->name, NIPQUAD(newtarget));
 754                                 targets[i] = 0;
 755                                 done = 1;
 756                         }
 757                 }
 758                 if (!done) {
 759                         printk(KERN_INFO DRV_NAME
 760                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 761                                bond->dev->name, NIPQUAD(newtarget));
 762                         ret = -EINVAL;
 763                         goto out;
 764                 }
 765         }
 766         else {
 767                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 768                         bond->dev->name);
 769                 ret = -EPERM;
 770                 goto out;
 771         }
 772
 773 out:
 774         return ret;
 775 }
 776 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 777
 778 /*
 779  * Show and set the up and down delays.  These must be multiples of the
 780  * MII monitoring value, and are stored internally as the multiplier.
 781  * Thus, we must translate to MS for the real world.
 782  */
 783 static ssize_t bonding_show_downdelay(struct device *d,
 784                                       struct device_attribute *attr,
 785                                       char *buf)
 786 {
 787         struct bonding *bond = to_bond(d);
 788
 789         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 790 }
 791
 792 static ssize_t bonding_store_downdelay(struct device *d,
 793                                        struct device_attribute *attr,
 794                                        const char *buf, size_t count)
 795 {
 796         int new_value, ret = count;
 797         struct bonding *bond = to_bond(d);
 798
 799         if (!(bond->params.miimon)) {
 800                 printk(KERN_ERR DRV_NAME
 801                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 802                        bond->dev->name);
 803                 ret = -EPERM;
 804                 goto out;
 805         }
 806
 807         if (sscanf(buf, "%d", &new_value) != 1) {
 808                 printk(KERN_ERR DRV_NAME
 809                        ": %s: no down delay value specified.\n",
 810                        bond->dev->name);
 811                 ret = -EINVAL;
 812                 goto out;
 813         }
 814         if (new_value < 0) {
 815                 printk(KERN_ERR DRV_NAME
 816                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 817                        bond->dev->name, new_value, 1, INT_MAX);
 818                 ret = -EINVAL;
 819                 goto out;
 820         } else {
 821                 if ((new_value % bond->params.miimon) != 0) {
 822                         printk(KERN_WARNING DRV_NAME
 823                                ": %s: Warning: down delay (%d) is not a multiple "
 824                                "of miimon (%d), delay rounded to %d ms\n",
 825                                bond->dev->name, new_value, bond->params.miimon,
 826                                (new_value / bond->params.miimon) *
 827                                bond->params.miimon);
 828                 }
 829                 bond->params.downdelay = new_value / bond->params.miimon;
 830                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 831                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 832
 833         }
 834
 835 out:
 836         return ret;
 837 }
 838 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 839
 840 static ssize_t bonding_show_updelay(struct device *d,
 841                                     struct device_attribute *attr,
 842                                     char *buf)
 843 {
 844         struct bonding *bond = to_bond(d);
 845
 846         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 847
 848 }
 849
 850 static ssize_t bonding_store_updelay(struct device *d,
 851                                      struct device_attribute *attr,
 852                                      const char *buf, size_t count)
 853 {
 854         int new_value, ret = count;
 855         struct bonding *bond = to_bond(d);
 856
 857         if (!(bond->params.miimon)) {
 858                 printk(KERN_ERR DRV_NAME
 859                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 860                        bond->dev->name);
 861                 ret = -EPERM;
 862                 goto out;
 863         }
 864
 865         if (sscanf(buf, "%d", &new_value) != 1) {
 866                 printk(KERN_ERR DRV_NAME
 867                        ": %s: no up delay value specified.\n",
 868                        bond->dev->name);
 869                 ret = -EINVAL;
 870                 goto out;
 871         }
 872         if (new_value < 0) {
 873                 printk(KERN_ERR DRV_NAME
 874                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 875                        bond->dev->name, new_value, 1, INT_MAX);
 876                 ret = -EINVAL;
 877                 goto out;
 878         } else {
 879                 if ((new_value % bond->params.miimon) != 0) {
 880                         printk(KERN_WARNING DRV_NAME
 881                                ": %s: Warning: up delay (%d) is not a multiple "
 882                                "of miimon (%d), updelay rounded to %d ms\n",
 883                                bond->dev->name, new_value, bond->params.miimon,
 884                                (new_value / bond->params.miimon) *
 885                                bond->params.miimon);
 886                 }
 887                 bond->params.updelay = new_value / bond->params.miimon;
 888                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 889                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 890
 891         }
 892
 893 out:
 894         return ret;
 895 }
 896 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 897
 898 /*
 899  * Show and set the LACP interval.  Interface must be down, and the mode
 900  * must be set to 802.3ad mode.
 901  */
 902 static ssize_t bonding_show_lacp(struct device *d,
 903                                  struct device_attribute *attr,
 904                                  char *buf)
 905 {
 906         struct bonding *bond = to_bond(d);
 907
 908         return sprintf(buf, "%s %d\n",
 909                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 910                 bond->params.lacp_fast);
 911 }
 912
 913 static ssize_t bonding_store_lacp(struct device *d,
 914                                   struct device_attribute *attr,
 915                                   const char *buf, size_t count)
 916 {
 917         int new_value, ret = count;
 918         struct bonding *bond = to_bond(d);
 919
 920         if (bond->dev->flags & IFF_UP) {
 921                 printk(KERN_ERR DRV_NAME
 922                        ": %s: Unable to update LACP rate because interface is up.\n",
 923                        bond->dev->name);
 924                 ret = -EPERM;
 925                 goto out;
 926         }
 927
 928         if (bond->params.mode != BOND_MODE_8023AD) {
 929                 printk(KERN_ERR DRV_NAME
 930                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 931                        bond->dev->name);
 932                 ret = -EPERM;
 933                 goto out;
 934         }
 935
 936         new_value = bond_parse_parm(buf, bond_lacp_tbl);
 937
 938         if ((new_value == 1) || (new_value == 0)) {
 939                 bond->params.lacp_fast = new_value;
 940                 printk(KERN_INFO DRV_NAME
 941                        ": %s: Setting LACP rate to %s (%d).\n",
 942                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 943         } else {
 944                 printk(KERN_ERR DRV_NAME
 945                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 946                         bond->dev->name, (int)strlen(buf) - 1, buf);
 947                 ret = -EINVAL;
 948         }
 949 out:
 950         return ret;
 951 }
 952 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 953
 954 /*
 955  * Show and set the MII monitor interval.  There are two tricky bits
 956  * here.  First, if MII monitoring is activated, then we must disable
 957  * ARP monitoring.  Second, if the timer isn't running, we must
 958  * start it.
 959  */
 960 static ssize_t bonding_show_miimon(struct device *d,
 961                                    struct device_attribute *attr,
 962                                    char *buf)
 963 {
 964         struct bonding *bond = to_bond(d);
 965
 966         return sprintf(buf, "%d\n", bond->params.miimon);
 967 }
 968
 969 static ssize_t bonding_store_miimon(struct device *d,
 970                                     struct device_attribute *attr,
 971                                     const char *buf, size_t count)
 972 {
 973         int new_value, ret = count;
 974         struct bonding *bond = to_bond(d);
 975
 976         if (sscanf(buf, "%d", &new_value) != 1) {
 977                 printk(KERN_ERR DRV_NAME
 978                        ": %s: no miimon value specified.\n",
 979                        bond->dev->name);
 980                 ret = -EINVAL;
 981                 goto out;
 982         }
 983         if (new_value < 0) {
 984                 printk(KERN_ERR DRV_NAME
 985                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 986                        bond->dev->name, new_value, 1, INT_MAX);
 987                 ret = -EINVAL;
 988                 goto out;
 989         } else {
 990                 printk(KERN_INFO DRV_NAME
 991                        ": %s: Setting MII monitoring interval to %d.\n",
 992                        bond->dev->name, new_value);
 993                 bond->params.miimon = new_value;
 994                 if(bond->params.updelay)
 995                         printk(KERN_INFO DRV_NAME
 996                               ": %s: Note: Updating updelay (to %d) "
 997                               "since it is a multiple of the miimon value.\n",
 998                               bond->dev->name,
 999                               bond->params.updelay * bond->params.miimon);
1000                 if(bond->params.downdelay)
1001                         printk(KERN_INFO DRV_NAME
1002                               ": %s: Note: Updating downdelay (to %d) "
1003                               "since it is a multiple of the miimon value.\n",
1004                               bond->dev->name,
1005                               bond->params.downdelay * bond->params.miimon);
1006                 if (bond->params.arp_interval) {
1007                         printk(KERN_INFO DRV_NAME
1008                                ": %s: MII monitoring cannot be used with "
1009                                "ARP monitoring. Disabling ARP monitoring...\n",
1010                                bond->dev->name);
1011                         bond->params.arp_interval = 0;
1012                         if (bond->params.arp_validate) {
1013                                 bond_unregister_arp(bond);
1014                                 bond->params.arp_validate =
1015                                         BOND_ARP_VALIDATE_NONE;
1016                         }
1017                         if (delayed_work_pending(&bond->arp_work)) {
1018                                 cancel_delayed_work(&bond->arp_work);
1019                                 flush_workqueue(bond->wq);
1020                         }
1021                 }
1022
1023                 if (bond->dev->flags & IFF_UP) {
1024                         /* If the interface is up, we may need to fire off
1025                          * the MII timer. If the interface is down, the
1026                          * timer will get fired off when the open function
1027                          * is called.
1028                          */
1029                         if (!delayed_work_pending(&bond->mii_work)) {
1030                                 INIT_DELAYED_WORK(&bond->mii_work,
1031                                                   bond_mii_monitor);
1032                                 queue_delayed_work(bond->wq,
1033                                                    &bond->mii_work, 0);
1034                         }
1035                 }
1036         }
1037 out:
1038         return ret;
1039 }
1040 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1041
1042 /*
1043  * Show and set the primary slave.  The store function is much
1044  * simpler than bonding_store_slaves function because it only needs to
1045  * handle one interface name.
1046  * The bond must be a mode that supports a primary for this be
1047  * set.
1048  */
1049 static ssize_t bonding_show_primary(struct device *d,
1050                                     struct device_attribute *attr,
1051                                     char *buf)
1052 {
1053         int count = 0;
1054         struct bonding *bond = to_bond(d);
1055
1056         if (bond->primary_slave)
1057                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1058
1059         return count;
1060 }
1061
1062 static ssize_t bonding_store_primary(struct device *d,
1063                                      struct device_attribute *attr,
1064                                      const char *buf, size_t count)
1065 {
1066         int i;
1067         struct slave *slave;
1068         struct bonding *bond = to_bond(d);
1069
1070         rtnl_lock();
1071         read_lock(&bond->lock);
1072         write_lock_bh(&bond->curr_slave_lock);
1073
1074         if (!USES_PRIMARY(bond->params.mode)) {
1075                 printk(KERN_INFO DRV_NAME
1076                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1077                        bond->dev->name, bond->dev->name, bond->params.mode);
1078         } else {
1079                 bond_for_each_slave(bond, slave, i) {
1080                         if (strnicmp
1081                             (slave->dev->name, buf,
1082                              strlen(slave->dev->name)) == 0) {
1083                                 printk(KERN_INFO DRV_NAME
1084                                        ": %s: Setting %s as primary slave.\n",
1085                                        bond->dev->name, slave->dev->name);
1086                                 bond->primary_slave = slave;
1087                                 bond_select_active_slave(bond);
1088                                 goto out;
1089                         }
1090                 }
1091
1092                 /* if we got here, then we didn't match the name of any slave */
1093
1094                 if (strlen(buf) == 0 || buf[0] == '\n') {
1095                         printk(KERN_INFO DRV_NAME
1096                                ": %s: Setting primary slave to None.\n",
1097                                bond->dev->name);
1098                         bond->primary_slave = NULL;
1099                                 bond_select_active_slave(bond);
1100                 } else {
1101                         printk(KERN_INFO DRV_NAME
1102                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1103                                bond->dev->name, (int)strlen(buf) - 1, buf);
1104                 }
1105         }
1106 out:
1107         write_unlock_bh(&bond->curr_slave_lock);
1108         read_unlock(&bond->lock);
1109         rtnl_unlock();
1110
1111         return count;
1112 }
1113 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1114
1115 /*
1116  * Show and set the use_carrier flag.
1117  */
1118 static ssize_t bonding_show_carrier(struct device *d,
1119                                     struct device_attribute *attr,
1120                                     char *buf)
1121 {
1122         struct bonding *bond = to_bond(d);
1123
1124         return sprintf(buf, "%d\n", bond->params.use_carrier);
1125 }
1126
1127 static ssize_t bonding_store_carrier(struct device *d,
1128                                      struct device_attribute *attr,
1129                                      const char *buf, size_t count)
1130 {
1131         int new_value, ret = count;
1132         struct bonding *bond = to_bond(d);
1133
1134
1135         if (sscanf(buf, "%d", &new_value) != 1) {
1136                 printk(KERN_ERR DRV_NAME
1137                        ": %s: no use_carrier value specified.\n",
1138                        bond->dev->name);
1139                 ret = -EINVAL;
1140                 goto out;
1141         }
1142         if ((new_value == 0) || (new_value == 1)) {
1143                 bond->params.use_carrier = new_value;
1144                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1145                        bond->dev->name, new_value);
1146         } else {
1147                 printk(KERN_INFO DRV_NAME
1148                        ": %s: Ignoring invalid use_carrier value %d.\n",
1149                        bond->dev->name, new_value);
1150         }
1151 out:
1152         return count;
1153 }
1154 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1155
1156
1157 /*
1158  * Show and set currently active_slave.
1159  */
1160 static ssize_t bonding_show_active_slave(struct device *d,
1161                                          struct device_attribute *attr,
1162                                          char *buf)
1163 {
1164         struct slave *curr;
1165         struct bonding *bond = to_bond(d);
1166         int count = 0;
1167
1168         read_lock(&bond->curr_slave_lock);
1169         curr = bond->curr_active_slave;
1170         read_unlock(&bond->curr_slave_lock);
1171
1172         if (USES_PRIMARY(bond->params.mode) && curr)
1173                 count = sprintf(buf, "%s\n", curr->dev->name);
1174         return count;
1175 }
1176
1177 static ssize_t bonding_store_active_slave(struct device *d,
1178                                           struct device_attribute *attr,
1179                                           const char *buf, size_t count)
1180 {
1181         int i;
1182         struct slave *slave;
1183         struct slave *old_active = NULL;
1184         struct slave *new_active = NULL;
1185         struct bonding *bond = to_bond(d);
1186
1187         rtnl_lock();
1188         read_lock(&bond->lock);
1189         write_lock_bh(&bond->curr_slave_lock);
1190
1191         if (!USES_PRIMARY(bond->params.mode)) {
1192                 printk(KERN_INFO DRV_NAME
1193                        ": %s: Unable to change active slave; %s is in mode %d\n",
1194                        bond->dev->name, bond->dev->name, bond->params.mode);
1195         } else {
1196                 bond_for_each_slave(bond, slave, i) {
1197                         if (strnicmp
1198                             (slave->dev->name, buf,
1199                              strlen(slave->dev->name)) == 0) {
1200                                 old_active = bond->curr_active_slave;
1201                                 new_active = slave;
1202                                 if (new_active == old_active) {
1203                                         /* do nothing */
1204                                         printk(KERN_INFO DRV_NAME
1205                                                ": %s: %s is already the current active slave.\n",
1206                                                bond->dev->name, slave->dev->name);
1207                                         goto out;
1208                                 }
1209                                 else {
1210                                         if ((new_active) &&
1211                                             (old_active) &&
1212                                             (new_active->link == BOND_LINK_UP) &&
1213                                             IS_UP(new_active->dev)) {
1214                                                 printk(KERN_INFO DRV_NAME
1215                                                       ": %s: Setting %s as active slave.\n",
1216                                                       bond->dev->name, slave->dev->name);
1217                                                 bond_change_active_slave(bond, new_active);
1218                                         }
1219                                         else {
1220                                                 printk(KERN_INFO DRV_NAME
1221                                                       ": %s: Could not set %s as active slave; "
1222                                                       "either %s is down or the link is down.\n",
1223                                                       bond->dev->name, slave->dev->name,
1224                                                       slave->dev->name);
1225                                         }
1226                                         goto out;
1227                                 }
1228                         }
1229                 }
1230
1231                 /* if we got here, then we didn't match the name of any slave */
1232
1233                 if (strlen(buf) == 0 || buf[0] == '\n') {
1234                         printk(KERN_INFO DRV_NAME
1235                                ": %s: Setting active slave to None.\n",
1236                                bond->dev->name);
1237                         bond->primary_slave = NULL;
1238                                 bond_select_active_slave(bond);
1239                 } else {
1240                         printk(KERN_INFO DRV_NAME
1241                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1242                                bond->dev->name, (int)strlen(buf) - 1, buf);
1243                 }
1244         }
1245 out:
1246         write_unlock_bh(&bond->curr_slave_lock);
1247         read_unlock(&bond->lock);
1248         rtnl_unlock();
1249
1250         return count;
1251
1252 }
1253 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1254
1255
1256 /*
1257  * Show link status of the bond interface.
1258  */
1259 static ssize_t bonding_show_mii_status(struct device *d,
1260                                        struct device_attribute *attr,
1261                                        char *buf)
1262 {
1263         struct slave *curr;
1264         struct bonding *bond = to_bond(d);
1265
1266         read_lock(&bond->curr_slave_lock);
1267         curr = bond->curr_active_slave;
1268         read_unlock(&bond->curr_slave_lock);
1269
1270         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1271 }
1272 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1273
1274
1275 /*
1276  * Show current 802.3ad aggregator ID.
1277  */
1278 static ssize_t bonding_show_ad_aggregator(struct device *d,
1279                                           struct device_attribute *attr,
1280                                           char *buf)
1281 {
1282         int count = 0;
1283         struct bonding *bond = to_bond(d);
1284
1285         if (bond->params.mode == BOND_MODE_8023AD) {
1286                 struct ad_info ad_info;
1287                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1288         }
1289
1290         return count;
1291 }
1292 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1293
1294
1295 /*
1296  * Show number of active 802.3ad ports.
1297  */
1298 static ssize_t bonding_show_ad_num_ports(struct device *d,
1299                                          struct device_attribute *attr,
1300                                          char *buf)
1301 {
1302         int count = 0;
1303         struct bonding *bond = to_bond(d);
1304
1305         if (bond->params.mode == BOND_MODE_8023AD) {
1306                 struct ad_info ad_info;
1307                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1308         }
1309
1310         return count;
1311 }
1312 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1313
1314
1315 /*
1316  * Show current 802.3ad actor key.
1317  */
1318 static ssize_t bonding_show_ad_actor_key(struct device *d,
1319                                          struct device_attribute *attr,
1320                                          char *buf)
1321 {
1322         int count = 0;
1323         struct bonding *bond = to_bond(d);
1324
1325         if (bond->params.mode == BOND_MODE_8023AD) {
1326                 struct ad_info ad_info;
1327                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1328         }
1329
1330         return count;
1331 }
1332 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1333
1334
1335 /*
1336  * Show current 802.3ad partner key.
1337  */
1338 static ssize_t bonding_show_ad_partner_key(struct device *d,
1339                                            struct device_attribute *attr,
1340                                            char *buf)
1341 {
1342         int count = 0;
1343         struct bonding *bond = to_bond(d);
1344
1345         if (bond->params.mode == BOND_MODE_8023AD) {
1346                 struct ad_info ad_info;
1347                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1348         }
1349
1350         return count;
1351 }
1352 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1353
1354
1355 /*
1356  * Show current 802.3ad partner mac.
1357  */
1358 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1359                                            struct device_attribute *attr,
1360                                            char *buf)
1361 {
1362         int count = 0;
1363         struct bonding *bond = to_bond(d);
1364         DECLARE_MAC_BUF(mac);
1365
1366         if (bond->params.mode == BOND_MODE_8023AD) {
1367                 struct ad_info ad_info;
1368                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1369                         count = sprintf(buf,"%s\n",
1370                                         print_mac(mac, ad_info.partner_system));
1371                 }
1372         }
1373
1374         return count;
1375 }
1376 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1377
1378
1379
1380 static struct attribute *per_bond_attrs[] = {
1381         &dev_attr_slaves.attr,
1382         &dev_attr_mode.attr,
1383         &dev_attr_fail_over_mac.attr,
1384         &dev_attr_arp_validate.attr,
1385         &dev_attr_arp_interval.attr,
1386         &dev_attr_arp_ip_target.attr,
1387         &dev_attr_downdelay.attr,
1388         &dev_attr_updelay.attr,
1389         &dev_attr_lacp_rate.attr,
1390         &dev_attr_xmit_hash_policy.attr,
1391         &dev_attr_miimon.attr,
1392         &dev_attr_primary.attr,
1393         &dev_attr_use_carrier.attr,
1394         &dev_attr_active_slave.attr,
1395         &dev_attr_mii_status.attr,
1396         &dev_attr_ad_aggregator.attr,
1397         &dev_attr_ad_num_ports.attr,
1398         &dev_attr_ad_actor_key.attr,
1399         &dev_attr_ad_partner_key.attr,
1400         &dev_attr_ad_partner_mac.attr,
1401         NULL,
1402 };
1403
1404 static struct attribute_group bonding_group = {
1405         .name = "bonding",
1406         .attrs = per_bond_attrs,
1407 };
1408
1409 /*
1410  * Initialize sysfs.  This sets up the bonding_masters file in
1411  * /sys/class/net.
1412  */
1413 int bond_create_sysfs(void)
1414 {
1415         int ret = 0;
1416         struct bonding *firstbond;
1417
1418         /* get the netdev class pointer */
1419         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1420         if (!firstbond)
1421                 return -ENODEV;
1422
1423         netdev_class = firstbond->dev->dev.class;
1424         if (!netdev_class)
1425                 return -ENODEV;
1426
1427         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1428         /*
1429          * Permit multiple loads of the module by ignoring failures to
1430          * create the bonding_masters sysfs file.  Bonding devices
1431          * created by second or subsequent loads of the module will
1432          * not be listed in, or controllable by, bonding_masters, but
1433          * will have the usual "bonding" sysfs directory.
1434          *
1435          * This is done to preserve backwards compatibility for
1436          * initscripts/sysconfig, which load bonding multiple times to
1437          * configure multiple bonding devices.
1438          */
1439         if (ret == -EEXIST) {
1440                 /* Is someone being kinky and naming a device bonding_master? */
1441                 if (__dev_get_by_name(&init_net,
1442                                       class_attr_bonding_masters.attr.name))
1443                         printk(KERN_ERR
1444                                "network device named %s already exists in sysfs",
1445                                class_attr_bonding_masters.attr.name);
1446                 else {
1447                         netdev_class = NULL;
1448                         return 0;
1449                 }
1450         }
1451
1452         return ret;
1453
1454 }
1455
1456 /*
1457  * Remove /sys/class/net/bonding_masters.
1458  */
1459 void bond_destroy_sysfs(void)
1460 {
1461         if (netdev_class)
1462                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1463 }
1464
1465 /*
1466  * Initialize sysfs for each bond.  This sets up and registers
1467  * the 'bondctl' directory for each individual bond under /sys/class/net.
1468  */
1469 int bond_create_sysfs_entry(struct bonding *bond)
1470 {
1471         struct net_device *dev = bond->dev;
1472         int err;
1473
1474         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1475         if (err) {
1476                 printk(KERN_EMERG "eek! didn't create group!\n");
1477         }
1478
1479         if (expected_refcount < 1)
1480                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1481
1482         return err;
1483 }
1484 /*
1485  * Remove sysfs entries for each bond.
1486  */
1487 void bond_destroy_sysfs_entry(struct bonding *bond)
1488 {
1489         struct net_device *dev = bond->dev;
1490
1491         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1492 }
1493