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/string.h>
  35 #include <linux/ctype.h>
  36 #include <linux/inet.h>
  37 #include <linux/rtnetlink.h>
  38 #include <net/net_namespace.h>
  39
  40 /* #define BONDING_DEBUG 1 */
  41 #include "bonding.h"
  42 #define to_dev(obj)     container_of(obj,struct device,kobj)
  43 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
  44
  45 /*---------------------------- Declarations -------------------------------*/
  46
  47
  48 extern struct list_head bond_dev_list;
  49 extern struct bond_params bonding_defaults;
  50 extern struct bond_parm_tbl bond_mode_tbl[];
  51 extern struct bond_parm_tbl bond_lacp_tbl[];
  52 extern struct bond_parm_tbl xmit_hashtype_tbl[];
  53 extern struct bond_parm_tbl arp_validate_tbl[];
  54
  55 static int expected_refcount = -1;
  56 static struct class *netdev_class;
  57 /*--------------------------- Data Structures -----------------------------*/
  58
  59 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
  60  * Because kobject_register tries to acquire the subsystem lock.  If
  61  * we already hold the lock (which we would if the user was creating
  62  * a new bond through the sysfs interface), we deadlock.
  63  * This lock is only needed when deleting a bond - we need to make sure
  64  * that we don't collide with an ongoing ioctl.
  65  */
  66
  67 struct rw_semaphore bonding_rwsem;
  68
  69
  70
  71
  72 /*------------------------------ Functions --------------------------------*/
  73
  74 /*
  75  * "show" function for the bond_masters attribute.
  76  * The class parameter is ignored.
  77  */
  78 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
  79 {
  80         int res = 0;
  81         struct bonding *bond;
  82
  83         down_read(&(bonding_rwsem));
  84
  85         list_for_each_entry(bond, &bond_dev_list, bond_list) {
  86                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
  87                         /* not enough space for another interface name */
  88                         if ((PAGE_SIZE - res) > 10)
  89                                 res = PAGE_SIZE - 10;
  90                         res += sprintf(buffer + res, "++more++");
  91                         break;
  92                 }
  93                 res += sprintf(buffer + res, "%s ",
  94                                bond->dev->name);
  95         }
  96         res += sprintf(buffer + res, "\n");
  97         res++;
  98         up_read(&(bonding_rwsem));
  99         return res;
 100 }
 101
 102 /*
 103  * "store" function for the bond_masters attribute.  This is what
 104  * creates and deletes entire bonds.
 105  *
 106  * The class parameter is ignored.
 107  *
 108  */
 109
 110 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
 111 {
 112         char command[IFNAMSIZ + 1] = {0, };
 113         char *ifname;
 114         int res = count;
 115         struct bonding *bond;
 116         struct bonding *nxt;
 117
 118         down_write(&(bonding_rwsem));
 119         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 120         ifname = command + 1;
 121         if ((strlen(command) <= 1) ||
 122             !dev_valid_name(ifname))
 123                 goto err_no_cmd;
 124
 125         if (command[0] == '+') {
 126
 127                 /* Check to see if the bond already exists. */
 128                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 129                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 130                                 printk(KERN_ERR DRV_NAME
 131                                         ": cannot add bond %s; it already exists\n",
 132                                         ifname);
 133                                 res = -EPERM;
 134                                 goto out;
 135                         }
 136
 137                 printk(KERN_INFO DRV_NAME
 138                         ": %s is being created...\n", ifname);
 139                 if (bond_create(ifname, &bonding_defaults, &bond)) {
 140                         printk(KERN_INFO DRV_NAME
 141                         ": %s interface already exists. Bond creation failed.\n",
 142                         ifname);
 143                         res = -EPERM;
 144                 }
 145                 goto out;
 146         }
 147
 148         if (command[0] == '-') {
 149                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
 150                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
 151                                 rtnl_lock();
 152                                 /* check the ref count on the bond's kobject.
 153                                  * If it's > expected, then there's a file open,
 154                                  * and we have to fail.
 155                                  */
 156                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
 157                                                         > expected_refcount){
 158                                         rtnl_unlock();
 159                                         printk(KERN_INFO DRV_NAME
 160                                                 ": Unable remove bond %s due to open references.\n",
 161                                                 ifname);
 162                                         res = -EPERM;
 163                                         goto out;
 164                                 }
 165                                 printk(KERN_INFO DRV_NAME
 166                                         ": %s is being deleted...\n",
 167                                         bond->dev->name);
 168                                 bond_deinit(bond->dev);
 169                                 bond_destroy_sysfs_entry(bond);
 170                                 unregister_netdevice(bond->dev);
 171                                 rtnl_unlock();
 172                                 goto out;
 173                         }
 174
 175                 printk(KERN_ERR DRV_NAME
 176                         ": unable to delete non-existent bond %s\n", ifname);
 177                 res = -ENODEV;
 178                 goto out;
 179         }
 180
 181 err_no_cmd:
 182         printk(KERN_ERR DRV_NAME
 183                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
 184         res = -EPERM;
 185
 186         /* Always return either count or an error.  If you return 0, you'll
 187          * get called forever, which is bad.
 188          */
 189 out:
 190         up_write(&(bonding_rwsem));
 191         return res;
 192 }
 193 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
 194 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
 195                   bonding_show_bonds, bonding_store_bonds);
 196
 197 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
 198 {
 199         char linkname[IFNAMSIZ+7];
 200         int ret = 0;
 201
 202         /* first, create a link from the slave back to the master */
 203         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
 204                                 "master");
 205         if (ret)
 206                 return ret;
 207         /* next, create a link from the master to the slave */
 208         sprintf(linkname,"slave_%s",slave->name);
 209         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
 210                                 linkname);
 211         return ret;
 212
 213 }
 214
 215 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
 216 {
 217         char linkname[IFNAMSIZ+7];
 218
 219         sysfs_remove_link(&(slave->dev.kobj), "master");
 220         sprintf(linkname,"slave_%s",slave->name);
 221         sysfs_remove_link(&(master->dev.kobj), linkname);
 222 }
 223
 224
 225 /*
 226  * Show the slaves in the current bond.
 227  */
 228 static ssize_t bonding_show_slaves(struct device *d,
 229                                    struct device_attribute *attr, char *buf)
 230 {
 231         struct slave *slave;
 232         int i, res = 0;
 233         struct bonding *bond = to_bond(d);
 234
 235         read_lock_bh(&bond->lock);
 236         bond_for_each_slave(bond, slave, i) {
 237                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
 238                         /* not enough space for another interface name */
 239                         if ((PAGE_SIZE - res) > 10)
 240                                 res = PAGE_SIZE - 10;
 241                         res += sprintf(buf + res, "++more++");
 242                         break;
 243                 }
 244                 res += sprintf(buf + res, "%s ", slave->dev->name);
 245         }
 246         read_unlock_bh(&bond->lock);
 247         res += sprintf(buf + res, "\n");
 248         res++;
 249         return res;
 250 }
 251
 252 /*
 253  * Set the slaves in the current bond.  The bond interface must be
 254  * up for this to succeed.
 255  * This function is largely the same flow as bonding_update_bonds().
 256  */
 257 static ssize_t bonding_store_slaves(struct device *d,
 258                                     struct device_attribute *attr,
 259                                     const char *buffer, size_t count)
 260 {
 261         char command[IFNAMSIZ + 1] = { 0, };
 262         char *ifname;
 263         int i, res, found, ret = count;
 264         struct slave *slave;
 265         struct net_device *dev = NULL;
 266         struct bonding *bond = to_bond(d);
 267
 268         /* Quick sanity check -- is the bond interface up? */
 269         if (!(bond->dev->flags & IFF_UP)) {
 270                 printk(KERN_ERR DRV_NAME
 271                        ": %s: Unable to update slaves because interface is down.\n",
 272                        bond->dev->name);
 273                 ret = -EPERM;
 274                 goto out;
 275         }
 276
 277         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
 278
 279         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
 280         ifname = command + 1;
 281         if ((strlen(command) <= 1) ||
 282             !dev_valid_name(ifname))
 283                 goto err_no_cmd;
 284
 285         if (command[0] == '+') {
 286
 287                 /* Got a slave name in ifname.  Is it already in the list? */
 288                 found = 0;
 289                 read_lock_bh(&bond->lock);
 290                 bond_for_each_slave(bond, slave, i)
 291                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 292                                 printk(KERN_ERR DRV_NAME
 293                                        ": %s: Interface %s is already enslaved!\n",
 294                                        bond->dev->name, ifname);
 295                                 ret = -EPERM;
 296                                 read_unlock_bh(&bond->lock);
 297                                 goto out;
 298                         }
 299
 300                 read_unlock_bh(&bond->lock);
 301                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
 302                        bond->dev->name, ifname);
 303                 dev = dev_get_by_name(&init_net, ifname);
 304                 if (!dev) {
 305                         printk(KERN_INFO DRV_NAME
 306                                ": %s: Interface %s does not exist!\n",
 307                                bond->dev->name, ifname);
 308                         ret = -EPERM;
 309                         goto out;
 310                 }
 311                 else
 312                         dev_put(dev);
 313
 314                 if (dev->flags & IFF_UP) {
 315                         printk(KERN_ERR DRV_NAME
 316                                ": %s: Error: Unable to enslave %s "
 317                                "because it is already up.\n",
 318                                bond->dev->name, dev->name);
 319                         ret = -EPERM;
 320                         goto out;
 321                 }
 322                 /* If this is the first slave, then we need to set
 323                    the master's hardware address to be the same as the
 324                    slave's. */
 325                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
 326                         memcpy(bond->dev->dev_addr, dev->dev_addr,
 327                                dev->addr_len);
 328                 }
 329
 330                 /* Set the slave's MTU to match the bond */
 331                 if (dev->mtu != bond->dev->mtu) {
 332                         if (dev->change_mtu) {
 333                                 res = dev->change_mtu(dev,
 334                                                       bond->dev->mtu);
 335                                 if (res) {
 336                                         ret = res;
 337                                         goto out;
 338                                 }
 339                         } else {
 340                                 dev->mtu = bond->dev->mtu;
 341                         }
 342                 }
 343                 rtnl_lock();
 344                 res = bond_enslave(bond->dev, dev);
 345                 rtnl_unlock();
 346                 if (res) {
 347                         ret = res;
 348                 }
 349                 goto out;
 350         }
 351
 352         if (command[0] == '-') {
 353                 dev = NULL;
 354                 bond_for_each_slave(bond, slave, i)
 355                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 356                                 dev = slave->dev;
 357                                 break;
 358                         }
 359                 if (dev) {
 360                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 361                                 bond->dev->name, dev->name);
 362                         rtnl_lock();
 363                         res = bond_release(bond->dev, dev);
 364                         rtnl_unlock();
 365                         if (res) {
 366                                 ret = res;
 367                                 goto out;
 368                         }
 369                         /* set the slave MTU to the default */
 370                         if (dev->change_mtu) {
 371                                 dev->change_mtu(dev, 1500);
 372                         } else {
 373                                 dev->mtu = 1500;
 374                         }
 375                 }
 376                 else {
 377                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
 378                                 ifname, bond->dev->name);
 379                         ret = -ENODEV;
 380                 }
 381                 goto out;
 382         }
 383
 384 err_no_cmd:
 385         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
 386         ret = -EPERM;
 387
 388 out:
 389         return ret;
 390 }
 391
 392 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
 393
 394 /*
 395  * Show and set the bonding mode.  The bond interface must be down to
 396  * change the mode.
 397  */
 398 static ssize_t bonding_show_mode(struct device *d,
 399                                  struct device_attribute *attr, char *buf)
 400 {
 401         struct bonding *bond = to_bond(d);
 402
 403         return sprintf(buf, "%s %d\n",
 404                         bond_mode_tbl[bond->params.mode].modename,
 405                         bond->params.mode) + 1;
 406 }
 407
 408 static ssize_t bonding_store_mode(struct device *d,
 409                                   struct device_attribute *attr,
 410                                   const char *buf, size_t count)
 411 {
 412         int new_value, ret = count;
 413         struct bonding *bond = to_bond(d);
 414
 415         if (bond->dev->flags & IFF_UP) {
 416                 printk(KERN_ERR DRV_NAME
 417                        ": unable to update mode of %s because interface is up.\n",
 418                        bond->dev->name);
 419                 ret = -EPERM;
 420                 goto out;
 421         }
 422
 423         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
 424         if (new_value < 0)  {
 425                 printk(KERN_ERR DRV_NAME
 426                        ": %s: Ignoring invalid mode value %.*s.\n",
 427                        bond->dev->name,
 428                        (int)strlen(buf) - 1, buf);
 429                 ret = -EINVAL;
 430                 goto out;
 431         } else {
 432                 if (bond->params.mode == BOND_MODE_8023AD)
 433                         bond_unset_master_3ad_flags(bond);
 434
 435                 if (bond->params.mode == BOND_MODE_ALB)
 436                         bond_unset_master_alb_flags(bond);
 437
 438                 bond->params.mode = new_value;
 439                 bond_set_mode_ops(bond, bond->params.mode);
 440                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
 441                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
 442         }
 443 out:
 444         return ret;
 445 }
 446 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
 447
 448 /*
 449  * Show and set the bonding transmit hash method.  The bond interface must be down to
 450  * change the xmit hash policy.
 451  */
 452 static ssize_t bonding_show_xmit_hash(struct device *d,
 453                                       struct device_attribute *attr,
 454                                       char *buf)
 455 {
 456         int count;
 457         struct bonding *bond = to_bond(d);
 458
 459         if ((bond->params.mode != BOND_MODE_XOR) &&
 460             (bond->params.mode != BOND_MODE_8023AD)) {
 461                 // Not Applicable
 462                 count = sprintf(buf, "NA\n") + 1;
 463         } else {
 464                 count = sprintf(buf, "%s %d\n",
 465                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
 466                         bond->params.xmit_policy) + 1;
 467         }
 468
 469         return count;
 470 }
 471
 472 static ssize_t bonding_store_xmit_hash(struct device *d,
 473                                        struct device_attribute *attr,
 474                                        const char *buf, size_t count)
 475 {
 476         int new_value, ret = count;
 477         struct bonding *bond = to_bond(d);
 478
 479         if (bond->dev->flags & IFF_UP) {
 480                 printk(KERN_ERR DRV_NAME
 481                        "%s: Interface is up. Unable to update xmit policy.\n",
 482                        bond->dev->name);
 483                 ret = -EPERM;
 484                 goto out;
 485         }
 486
 487         if ((bond->params.mode != BOND_MODE_XOR) &&
 488             (bond->params.mode != BOND_MODE_8023AD)) {
 489                 printk(KERN_ERR DRV_NAME
 490                        "%s: Transmit hash policy is irrelevant in this mode.\n",
 491                        bond->dev->name);
 492                 ret = -EPERM;
 493                 goto out;
 494         }
 495
 496         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 497         if (new_value < 0)  {
 498                 printk(KERN_ERR DRV_NAME
 499                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
 500                        bond->dev->name,
 501                        (int)strlen(buf) - 1, buf);
 502                 ret = -EINVAL;
 503                 goto out;
 504         } else {
 505                 bond->params.xmit_policy = new_value;
 506                 bond_set_mode_ops(bond, bond->params.mode);
 507                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
 508                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
 509         }
 510 out:
 511         return ret;
 512 }
 513 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
 514
 515 /*
 516  * Show and set arp_validate.
 517  */
 518 static ssize_t bonding_show_arp_validate(struct device *d,
 519                                          struct device_attribute *attr,
 520                                          char *buf)
 521 {
 522         struct bonding *bond = to_bond(d);
 523
 524         return sprintf(buf, "%s %d\n",
 525                        arp_validate_tbl[bond->params.arp_validate].modename,
 526                        bond->params.arp_validate) + 1;
 527 }
 528
 529 static ssize_t bonding_store_arp_validate(struct device *d,
 530                                           struct device_attribute *attr,
 531                                           const char *buf, size_t count)
 532 {
 533         int new_value;
 534         struct bonding *bond = to_bond(d);
 535
 536         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
 537         if (new_value < 0) {
 538                 printk(KERN_ERR DRV_NAME
 539                        ": %s: Ignoring invalid arp_validate value %s\n",
 540                        bond->dev->name, buf);
 541                 return -EINVAL;
 542         }
 543         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
 544                 printk(KERN_ERR DRV_NAME
 545                        ": %s: arp_validate only supported in active-backup mode.\n",
 546                        bond->dev->name);
 547                 return -EINVAL;
 548         }
 549         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
 550                bond->dev->name, arp_validate_tbl[new_value].modename,
 551                new_value);
 552
 553         if (!bond->params.arp_validate && new_value) {
 554                 bond_register_arp(bond);
 555         } else if (bond->params.arp_validate && !new_value) {
 556                 bond_unregister_arp(bond);
 557         }
 558
 559         bond->params.arp_validate = new_value;
 560
 561         return count;
 562 }
 563
 564 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 565
 566 /*
 567  * Show and set the arp timer interval.  There are two tricky bits
 568  * here.  First, if ARP monitoring is activated, then we must disable
 569  * MII monitoring.  Second, if the ARP timer isn't running, we must
 570  * start it.
 571  */
 572 static ssize_t bonding_show_arp_interval(struct device *d,
 573                                          struct device_attribute *attr,
 574                                          char *buf)
 575 {
 576         struct bonding *bond = to_bond(d);
 577
 578         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
 579 }
 580
 581 static ssize_t bonding_store_arp_interval(struct device *d,
 582                                           struct device_attribute *attr,
 583                                           const char *buf, size_t count)
 584 {
 585         int new_value, ret = count;
 586         struct bonding *bond = to_bond(d);
 587
 588         if (sscanf(buf, "%d", &new_value) != 1) {
 589                 printk(KERN_ERR DRV_NAME
 590                        ": %s: no arp_interval value specified.\n",
 591                        bond->dev->name);
 592                 ret = -EINVAL;
 593                 goto out;
 594         }
 595         if (new_value < 0) {
 596                 printk(KERN_ERR DRV_NAME
 597                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
 598                        bond->dev->name, new_value, INT_MAX);
 599                 ret = -EINVAL;
 600                 goto out;
 601         }
 602
 603         printk(KERN_INFO DRV_NAME
 604                ": %s: Setting ARP monitoring interval to %d.\n",
 605                bond->dev->name, new_value);
 606         bond->params.arp_interval = new_value;
 607         if (bond->params.miimon) {
 608                 printk(KERN_INFO DRV_NAME
 609                        ": %s: ARP monitoring cannot be used with MII monitoring. "
 610                        "%s Disabling MII monitoring.\n",
 611                        bond->dev->name, bond->dev->name);
 612                 bond->params.miimon = 0;
 613                 /* Kill MII timer, else it brings bond's link down */
 614                 if (bond->arp_timer.function) {
 615                         printk(KERN_INFO DRV_NAME
 616                         ": %s: Kill MII timer, else it brings bond's link down...\n",
 617                        bond->dev->name);
 618                         del_timer_sync(&bond->mii_timer);
 619                 }
 620         }
 621         if (!bond->params.arp_targets[0]) {
 622                 printk(KERN_INFO DRV_NAME
 623                        ": %s: ARP monitoring has been set up, "
 624                        "but no ARP targets have been specified.\n",
 625                        bond->dev->name);
 626         }
 627         if (bond->dev->flags & IFF_UP) {
 628                 /* If the interface is up, we may need to fire off
 629                  * the ARP timer.  If the interface is down, the
 630                  * timer will get fired off when the open function
 631                  * is called.
 632                  */
 633                 if (bond->arp_timer.function) {
 634                         /* The timer's already set up, so fire it off */
 635                         mod_timer(&bond->arp_timer, jiffies + 1);
 636                 } else {
 637                         /* Set up the timer. */
 638                         init_timer(&bond->arp_timer);
 639                         bond->arp_timer.expires = jiffies + 1;
 640                         bond->arp_timer.data =
 641                                 (unsigned long) bond->dev;
 642                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
 643                                 bond->arp_timer.function =
 644                                         (void *)
 645                                         &bond_activebackup_arp_mon;
 646                         } else {
 647                                 bond->arp_timer.function =
 648                                         (void *)
 649                                         &bond_loadbalance_arp_mon;
 650                         }
 651                         add_timer(&bond->arp_timer);
 652                 }
 653         }
 654
 655 out:
 656         return ret;
 657 }
 658 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
 659
 660 /*
 661  * Show and set the arp targets.
 662  */
 663 static ssize_t bonding_show_arp_targets(struct device *d,
 664                                         struct device_attribute *attr,
 665                                         char *buf)
 666 {
 667         int i, res = 0;
 668         struct bonding *bond = to_bond(d);
 669
 670         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 671                 if (bond->params.arp_targets[i])
 672                         res += sprintf(buf + res, "%u.%u.%u.%u ",
 673                                NIPQUAD(bond->params.arp_targets[i]));
 674         }
 675         if (res)
 676                 res--;  /* eat the leftover space */
 677         res += sprintf(buf + res, "\n");
 678         res++;
 679         return res;
 680 }
 681
 682 static ssize_t bonding_store_arp_targets(struct device *d,
 683                                          struct device_attribute *attr,
 684                                          const char *buf, size_t count)
 685 {
 686         u32 newtarget;
 687         int i = 0, done = 0, ret = count;
 688         struct bonding *bond = to_bond(d);
 689         u32 *targets;
 690
 691         targets = bond->params.arp_targets;
 692         newtarget = in_aton(buf + 1);
 693         /* look for adds */
 694         if (buf[0] == '+') {
 695                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 696                         printk(KERN_ERR DRV_NAME
 697                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
 698                                bond->dev->name, NIPQUAD(newtarget));
 699                         ret = -EINVAL;
 700                         goto out;
 701                 }
 702                 /* look for an empty slot to put the target in, and check for dupes */
 703                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 704                         if (targets[i] == newtarget) { /* duplicate */
 705                                 printk(KERN_ERR DRV_NAME
 706                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
 707                                        bond->dev->name, NIPQUAD(newtarget));
 708                                 if (done)
 709                                         targets[i] = 0;
 710                                 ret = -EINVAL;
 711                                 goto out;
 712                         }
 713                         if (targets[i] == 0 && !done) {
 714                                 printk(KERN_INFO DRV_NAME
 715                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
 716                                        bond->dev->name, NIPQUAD(newtarget));
 717                                 done = 1;
 718                                 targets[i] = newtarget;
 719                         }
 720                 }
 721                 if (!done) {
 722                         printk(KERN_ERR DRV_NAME
 723                                ": %s: ARP target table is full!\n",
 724                                bond->dev->name);
 725                         ret = -EINVAL;
 726                         goto out;
 727                 }
 728
 729         }
 730         else if (buf[0] == '-') {
 731                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
 732                         printk(KERN_ERR DRV_NAME
 733                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
 734                                bond->dev->name, NIPQUAD(newtarget));
 735                         ret = -EINVAL;
 736                         goto out;
 737                 }
 738
 739                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
 740                         if (targets[i] == newtarget) {
 741                                 printk(KERN_INFO DRV_NAME
 742                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
 743                                        bond->dev->name, NIPQUAD(newtarget));
 744                                 targets[i] = 0;
 745                                 done = 1;
 746                         }
 747                 }
 748                 if (!done) {
 749                         printk(KERN_INFO DRV_NAME
 750                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
 751                                bond->dev->name, NIPQUAD(newtarget));
 752                         ret = -EINVAL;
 753                         goto out;
 754                 }
 755         }
 756         else {
 757                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
 758                         bond->dev->name);
 759                 ret = -EPERM;
 760                 goto out;
 761         }
 762
 763 out:
 764         return ret;
 765 }
 766 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
 767
 768 /*
 769  * Show and set the up and down delays.  These must be multiples of the
 770  * MII monitoring value, and are stored internally as the multiplier.
 771  * Thus, we must translate to MS for the real world.
 772  */
 773 static ssize_t bonding_show_downdelay(struct device *d,
 774                                       struct device_attribute *attr,
 775                                       char *buf)
 776 {
 777         struct bonding *bond = to_bond(d);
 778
 779         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
 780 }
 781
 782 static ssize_t bonding_store_downdelay(struct device *d,
 783                                        struct device_attribute *attr,
 784                                        const char *buf, size_t count)
 785 {
 786         int new_value, ret = count;
 787         struct bonding *bond = to_bond(d);
 788
 789         if (!(bond->params.miimon)) {
 790                 printk(KERN_ERR DRV_NAME
 791                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
 792                        bond->dev->name);
 793                 ret = -EPERM;
 794                 goto out;
 795         }
 796
 797         if (sscanf(buf, "%d", &new_value) != 1) {
 798                 printk(KERN_ERR DRV_NAME
 799                        ": %s: no down delay value specified.\n",
 800                        bond->dev->name);
 801                 ret = -EINVAL;
 802                 goto out;
 803         }
 804         if (new_value < 0) {
 805                 printk(KERN_ERR DRV_NAME
 806                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 807                        bond->dev->name, new_value, 1, INT_MAX);
 808                 ret = -EINVAL;
 809                 goto out;
 810         } else {
 811                 if ((new_value % bond->params.miimon) != 0) {
 812                         printk(KERN_WARNING DRV_NAME
 813                                ": %s: Warning: down delay (%d) is not a multiple "
 814                                "of miimon (%d), delay rounded to %d ms\n",
 815                                bond->dev->name, new_value, bond->params.miimon,
 816                                (new_value / bond->params.miimon) *
 817                                bond->params.miimon);
 818                 }
 819                 bond->params.downdelay = new_value / bond->params.miimon;
 820                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
 821                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
 822
 823         }
 824
 825 out:
 826         return ret;
 827 }
 828 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
 829
 830 static ssize_t bonding_show_updelay(struct device *d,
 831                                     struct device_attribute *attr,
 832                                     char *buf)
 833 {
 834         struct bonding *bond = to_bond(d);
 835
 836         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
 837
 838 }
 839
 840 static ssize_t bonding_store_updelay(struct device *d,
 841                                      struct device_attribute *attr,
 842                                      const char *buf, size_t count)
 843 {
 844         int new_value, ret = count;
 845         struct bonding *bond = to_bond(d);
 846
 847         if (!(bond->params.miimon)) {
 848                 printk(KERN_ERR DRV_NAME
 849                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
 850                        bond->dev->name);
 851                 ret = -EPERM;
 852                 goto out;
 853         }
 854
 855         if (sscanf(buf, "%d", &new_value) != 1) {
 856                 printk(KERN_ERR DRV_NAME
 857                        ": %s: no up delay value specified.\n",
 858                        bond->dev->name);
 859                 ret = -EINVAL;
 860                 goto out;
 861         }
 862         if (new_value < 0) {
 863                 printk(KERN_ERR DRV_NAME
 864                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
 865                        bond->dev->name, new_value, 1, INT_MAX);
 866                 ret = -EINVAL;
 867                 goto out;
 868         } else {
 869                 if ((new_value % bond->params.miimon) != 0) {
 870                         printk(KERN_WARNING DRV_NAME
 871                                ": %s: Warning: up delay (%d) is not a multiple "
 872                                "of miimon (%d), updelay rounded to %d ms\n",
 873                                bond->dev->name, new_value, bond->params.miimon,
 874                                (new_value / bond->params.miimon) *
 875                                bond->params.miimon);
 876                 }
 877                 bond->params.updelay = new_value / bond->params.miimon;
 878                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
 879                        bond->dev->name, bond->params.updelay * bond->params.miimon);
 880
 881         }
 882
 883 out:
 884         return ret;
 885 }
 886 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
 887
 888 /*
 889  * Show and set the LACP interval.  Interface must be down, and the mode
 890  * must be set to 802.3ad mode.
 891  */
 892 static ssize_t bonding_show_lacp(struct device *d,
 893                                  struct device_attribute *attr,
 894                                  char *buf)
 895 {
 896         struct bonding *bond = to_bond(d);
 897
 898         return sprintf(buf, "%s %d\n",
 899                 bond_lacp_tbl[bond->params.lacp_fast].modename,
 900                 bond->params.lacp_fast) + 1;
 901 }
 902
 903 static ssize_t bonding_store_lacp(struct device *d,
 904                                   struct device_attribute *attr,
 905                                   const char *buf, size_t count)
 906 {
 907         int new_value, ret = count;
 908         struct bonding *bond = to_bond(d);
 909
 910         if (bond->dev->flags & IFF_UP) {
 911                 printk(KERN_ERR DRV_NAME
 912                        ": %s: Unable to update LACP rate because interface is up.\n",
 913                        bond->dev->name);
 914                 ret = -EPERM;
 915                 goto out;
 916         }
 917
 918         if (bond->params.mode != BOND_MODE_8023AD) {
 919                 printk(KERN_ERR DRV_NAME
 920                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
 921                        bond->dev->name);
 922                 ret = -EPERM;
 923                 goto out;
 924         }
 925
 926         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
 927
 928         if ((new_value == 1) || (new_value == 0)) {
 929                 bond->params.lacp_fast = new_value;
 930                 printk(KERN_INFO DRV_NAME
 931                        ": %s: Setting LACP rate to %s (%d).\n",
 932                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
 933         } else {
 934                 printk(KERN_ERR DRV_NAME
 935                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
 936                         bond->dev->name, (int)strlen(buf) - 1, buf);
 937                 ret = -EINVAL;
 938         }
 939 out:
 940         return ret;
 941 }
 942 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
 943
 944 /*
 945  * Show and set the MII monitor interval.  There are two tricky bits
 946  * here.  First, if MII monitoring is activated, then we must disable
 947  * ARP monitoring.  Second, if the timer isn't running, we must
 948  * start it.
 949  */
 950 static ssize_t bonding_show_miimon(struct device *d,
 951                                    struct device_attribute *attr,
 952                                    char *buf)
 953 {
 954         struct bonding *bond = to_bond(d);
 955
 956         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
 957 }
 958
 959 static ssize_t bonding_store_miimon(struct device *d,
 960                                     struct device_attribute *attr,
 961                                     const char *buf, size_t count)
 962 {
 963         int new_value, ret = count;
 964         struct bonding *bond = to_bond(d);
 965
 966         if (sscanf(buf, "%d", &new_value) != 1) {
 967                 printk(KERN_ERR DRV_NAME
 968                        ": %s: no miimon value specified.\n",
 969                        bond->dev->name);
 970                 ret = -EINVAL;
 971                 goto out;
 972         }
 973         if (new_value < 0) {
 974                 printk(KERN_ERR DRV_NAME
 975                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
 976                        bond->dev->name, new_value, 1, INT_MAX);
 977                 ret = -EINVAL;
 978                 goto out;
 979         } else {
 980                 printk(KERN_INFO DRV_NAME
 981                        ": %s: Setting MII monitoring interval to %d.\n",
 982                        bond->dev->name, new_value);
 983                 bond->params.miimon = new_value;
 984                 if(bond->params.updelay)
 985                         printk(KERN_INFO DRV_NAME
 986                               ": %s: Note: Updating updelay (to %d) "
 987                               "since it is a multiple of the miimon value.\n",
 988                               bond->dev->name,
 989                               bond->params.updelay * bond->params.miimon);
 990                 if(bond->params.downdelay)
 991                         printk(KERN_INFO DRV_NAME
 992                               ": %s: Note: Updating downdelay (to %d) "
 993                               "since it is a multiple of the miimon value.\n",
 994                               bond->dev->name,
 995                               bond->params.downdelay * bond->params.miimon);
 996                 if (bond->params.arp_interval) {
 997                         printk(KERN_INFO DRV_NAME
 998                                ": %s: MII monitoring cannot be used with "
 999                                "ARP monitoring. Disabling ARP monitoring...\n",
1000                                bond->dev->name);
1001                         bond->params.arp_interval = 0;
1002                         if (bond->params.arp_validate) {
1003                                 bond_unregister_arp(bond);
1004                                 bond->params.arp_validate =
1005                                         BOND_ARP_VALIDATE_NONE;
1006                         }
1007                         /* Kill ARP timer, else it brings bond's link down */
1008                         if (bond->mii_timer.function) {
1009                                 printk(KERN_INFO DRV_NAME
1010                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
1011                                bond->dev->name);
1012                                 del_timer_sync(&bond->arp_timer);
1013                         }
1014                 }
1015
1016                 if (bond->dev->flags & IFF_UP) {
1017                         /* If the interface is up, we may need to fire off
1018                          * the MII timer. If the interface is down, the
1019                          * timer will get fired off when the open function
1020                          * is called.
1021                          */
1022                         if (bond->mii_timer.function) {
1023                                 /* The timer's already set up, so fire it off */
1024                                 mod_timer(&bond->mii_timer, jiffies + 1);
1025                         } else {
1026                                 /* Set up the timer. */
1027                                 init_timer(&bond->mii_timer);
1028                                 bond->mii_timer.expires = jiffies + 1;
1029                                 bond->mii_timer.data =
1030                                         (unsigned long) bond->dev;
1031                                 bond->mii_timer.function =
1032                                         (void *) &bond_mii_monitor;
1033                                 add_timer(&bond->mii_timer);
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) + 1;
1058         else
1059                 count = sprintf(buf, "\n") + 1;
1060
1061         return count;
1062 }
1063
1064 static ssize_t bonding_store_primary(struct device *d,
1065                                      struct device_attribute *attr,
1066                                      const char *buf, size_t count)
1067 {
1068         int i;
1069         struct slave *slave;
1070         struct bonding *bond = to_bond(d);
1071
1072         write_lock_bh(&bond->lock);
1073         if (!USES_PRIMARY(bond->params.mode)) {
1074                 printk(KERN_INFO DRV_NAME
1075                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1076                        bond->dev->name, bond->dev->name, bond->params.mode);
1077         } else {
1078                 bond_for_each_slave(bond, slave, i) {
1079                         if (strnicmp
1080                             (slave->dev->name, buf,
1081                              strlen(slave->dev->name)) == 0) {
1082                                 printk(KERN_INFO DRV_NAME
1083                                        ": %s: Setting %s as primary slave.\n",
1084                                        bond->dev->name, slave->dev->name);
1085                                 bond->primary_slave = slave;
1086                                 bond_select_active_slave(bond);
1087                                 goto out;
1088                         }
1089                 }
1090
1091                 /* if we got here, then we didn't match the name of any slave */
1092
1093                 if (strlen(buf) == 0 || buf[0] == '\n') {
1094                         printk(KERN_INFO DRV_NAME
1095                                ": %s: Setting primary slave to None.\n",
1096                                bond->dev->name);
1097                         bond->primary_slave = NULL;
1098                                 bond_select_active_slave(bond);
1099                 } else {
1100                         printk(KERN_INFO DRV_NAME
1101                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1102                                bond->dev->name, (int)strlen(buf) - 1, buf);
1103                 }
1104         }
1105 out:
1106         write_unlock_bh(&bond->lock);
1107         return count;
1108 }
1109 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1110
1111 /*
1112  * Show and set the use_carrier flag.
1113  */
1114 static ssize_t bonding_show_carrier(struct device *d,
1115                                     struct device_attribute *attr,
1116                                     char *buf)
1117 {
1118         struct bonding *bond = to_bond(d);
1119
1120         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1121 }
1122
1123 static ssize_t bonding_store_carrier(struct device *d,
1124                                      struct device_attribute *attr,
1125                                      const char *buf, size_t count)
1126 {
1127         int new_value, ret = count;
1128         struct bonding *bond = to_bond(d);
1129
1130
1131         if (sscanf(buf, "%d", &new_value) != 1) {
1132                 printk(KERN_ERR DRV_NAME
1133                        ": %s: no use_carrier value specified.\n",
1134                        bond->dev->name);
1135                 ret = -EINVAL;
1136                 goto out;
1137         }
1138         if ((new_value == 0) || (new_value == 1)) {
1139                 bond->params.use_carrier = new_value;
1140                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1141                        bond->dev->name, new_value);
1142         } else {
1143                 printk(KERN_INFO DRV_NAME
1144                        ": %s: Ignoring invalid use_carrier value %d.\n",
1145                        bond->dev->name, new_value);
1146         }
1147 out:
1148         return count;
1149 }
1150 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1151
1152
1153 /*
1154  * Show and set currently active_slave.
1155  */
1156 static ssize_t bonding_show_active_slave(struct device *d,
1157                                          struct device_attribute *attr,
1158                                          char *buf)
1159 {
1160         struct slave *curr;
1161         struct bonding *bond = to_bond(d);
1162         int count;
1163
1164
1165         read_lock(&bond->curr_slave_lock);
1166         curr = bond->curr_active_slave;
1167         read_unlock(&bond->curr_slave_lock);
1168
1169         if (USES_PRIMARY(bond->params.mode) && curr)
1170                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1171         else
1172                 count = sprintf(buf, "\n") + 1;
1173         return count;
1174 }
1175
1176 static ssize_t bonding_store_active_slave(struct device *d,
1177                                           struct device_attribute *attr,
1178                                           const char *buf, size_t count)
1179 {
1180         int i;
1181         struct slave *slave;
1182         struct slave *old_active = NULL;
1183         struct slave *new_active = NULL;
1184         struct bonding *bond = to_bond(d);
1185
1186         write_lock_bh(&bond->lock);
1187         if (!USES_PRIMARY(bond->params.mode)) {
1188                 printk(KERN_INFO DRV_NAME
1189                        ": %s: Unable to change active slave; %s is in mode %d\n",
1190                        bond->dev->name, bond->dev->name, bond->params.mode);
1191         } else {
1192                 bond_for_each_slave(bond, slave, i) {
1193                         if (strnicmp
1194                             (slave->dev->name, buf,
1195                              strlen(slave->dev->name)) == 0) {
1196                                 old_active = bond->curr_active_slave;
1197                                 new_active = slave;
1198                                 if (new_active == old_active) {
1199                                         /* do nothing */
1200                                         printk(KERN_INFO DRV_NAME
1201                                                ": %s: %s is already the current active slave.\n",
1202                                                bond->dev->name, slave->dev->name);
1203                                         goto out;
1204                                 }
1205                                 else {
1206                                         if ((new_active) &&
1207                                             (old_active) &&
1208                                             (new_active->link == BOND_LINK_UP) &&
1209                                             IS_UP(new_active->dev)) {
1210                                                 printk(KERN_INFO DRV_NAME
1211                                                       ": %s: Setting %s as active slave.\n",
1212                                                       bond->dev->name, slave->dev->name);
1213                                                 bond_change_active_slave(bond, new_active);
1214                                         }
1215                                         else {
1216                                                 printk(KERN_INFO DRV_NAME
1217                                                       ": %s: Could not set %s as active slave; "
1218                                                       "either %s is down or the link is down.\n",
1219                                                       bond->dev->name, slave->dev->name,
1220                                                       slave->dev->name);
1221                                         }
1222                                         goto out;
1223                                 }
1224                         }
1225                 }
1226
1227                 /* if we got here, then we didn't match the name of any slave */
1228
1229                 if (strlen(buf) == 0 || buf[0] == '\n') {
1230                         printk(KERN_INFO DRV_NAME
1231                                ": %s: Setting active slave to None.\n",
1232                                bond->dev->name);
1233                         bond->primary_slave = NULL;
1234                                 bond_select_active_slave(bond);
1235                 } else {
1236                         printk(KERN_INFO DRV_NAME
1237                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1238                                bond->dev->name, (int)strlen(buf) - 1, buf);
1239                 }
1240         }
1241 out:
1242         write_unlock_bh(&bond->lock);
1243         return count;
1244
1245 }
1246 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1247
1248
1249 /*
1250  * Show link status of the bond interface.
1251  */
1252 static ssize_t bonding_show_mii_status(struct device *d,
1253                                        struct device_attribute *attr,
1254                                        char *buf)
1255 {
1256         struct slave *curr;
1257         struct bonding *bond = to_bond(d);
1258
1259         read_lock(&bond->curr_slave_lock);
1260         curr = bond->curr_active_slave;
1261         read_unlock(&bond->curr_slave_lock);
1262
1263         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1264 }
1265 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1266
1267
1268 /*
1269  * Show current 802.3ad aggregator ID.
1270  */
1271 static ssize_t bonding_show_ad_aggregator(struct device *d,
1272                                           struct device_attribute *attr,
1273                                           char *buf)
1274 {
1275         int count = 0;
1276         struct bonding *bond = to_bond(d);
1277
1278         if (bond->params.mode == BOND_MODE_8023AD) {
1279                 struct ad_info ad_info;
1280                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1281         }
1282         else
1283                 count = sprintf(buf, "\n") + 1;
1284
1285         return count;
1286 }
1287 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1288
1289
1290 /*
1291  * Show number of active 802.3ad ports.
1292  */
1293 static ssize_t bonding_show_ad_num_ports(struct device *d,
1294                                          struct device_attribute *attr,
1295                                          char *buf)
1296 {
1297         int count = 0;
1298         struct bonding *bond = to_bond(d);
1299
1300         if (bond->params.mode == BOND_MODE_8023AD) {
1301                 struct ad_info ad_info;
1302                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1303         }
1304         else
1305                 count = sprintf(buf, "\n") + 1;
1306
1307         return count;
1308 }
1309 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1310
1311
1312 /*
1313  * Show current 802.3ad actor key.
1314  */
1315 static ssize_t bonding_show_ad_actor_key(struct device *d,
1316                                          struct device_attribute *attr,
1317                                          char *buf)
1318 {
1319         int count = 0;
1320         struct bonding *bond = to_bond(d);
1321
1322         if (bond->params.mode == BOND_MODE_8023AD) {
1323                 struct ad_info ad_info;
1324                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1325         }
1326         else
1327                 count = sprintf(buf, "\n") + 1;
1328
1329         return count;
1330 }
1331 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1332
1333
1334 /*
1335  * Show current 802.3ad partner key.
1336  */
1337 static ssize_t bonding_show_ad_partner_key(struct device *d,
1338                                            struct device_attribute *attr,
1339                                            char *buf)
1340 {
1341         int count = 0;
1342         struct bonding *bond = to_bond(d);
1343
1344         if (bond->params.mode == BOND_MODE_8023AD) {
1345                 struct ad_info ad_info;
1346                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1347         }
1348         else
1349                 count = sprintf(buf, "\n") + 1;
1350
1351         return count;
1352 }
1353 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1354
1355
1356 /*
1357  * Show current 802.3ad partner mac.
1358  */
1359 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1360                                            struct device_attribute *attr,
1361                                            char *buf)
1362 {
1363         int count = 0;
1364         struct bonding *bond = to_bond(d);
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,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1370                                        ad_info.partner_system[0],
1371                                        ad_info.partner_system[1],
1372                                        ad_info.partner_system[2],
1373                                        ad_info.partner_system[3],
1374                                        ad_info.partner_system[4],
1375                                        ad_info.partner_system[5]) + 1;
1376                 }
1377         }
1378         else
1379                 count = sprintf(buf, "\n") + 1;
1380
1381         return count;
1382 }
1383 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1384
1385
1386
1387 static struct attribute *per_bond_attrs[] = {
1388         &dev_attr_slaves.attr,
1389         &dev_attr_mode.attr,
1390         &dev_attr_arp_validate.attr,
1391         &dev_attr_arp_interval.attr,
1392         &dev_attr_arp_ip_target.attr,
1393         &dev_attr_downdelay.attr,
1394         &dev_attr_updelay.attr,
1395         &dev_attr_lacp_rate.attr,
1396         &dev_attr_xmit_hash_policy.attr,
1397         &dev_attr_miimon.attr,
1398         &dev_attr_primary.attr,
1399         &dev_attr_use_carrier.attr,
1400         &dev_attr_active_slave.attr,
1401         &dev_attr_mii_status.attr,
1402         &dev_attr_ad_aggregator.attr,
1403         &dev_attr_ad_num_ports.attr,
1404         &dev_attr_ad_actor_key.attr,
1405         &dev_attr_ad_partner_key.attr,
1406         &dev_attr_ad_partner_mac.attr,
1407         NULL,
1408 };
1409
1410 static struct attribute_group bonding_group = {
1411         .name = "bonding",
1412         .attrs = per_bond_attrs,
1413 };
1414
1415 /*
1416  * Initialize sysfs.  This sets up the bonding_masters file in
1417  * /sys/class/net.
1418  */
1419 int bond_create_sysfs(void)
1420 {
1421         int ret = 0;
1422         struct bonding *firstbond;
1423
1424         init_rwsem(&bonding_rwsem);
1425
1426         /* get the netdev class pointer */
1427         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1428         if (!firstbond)
1429                 return -ENODEV;
1430
1431         netdev_class = firstbond->dev->dev.class;
1432         if (!netdev_class)
1433                 return -ENODEV;
1434
1435         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1436         /*
1437          * Permit multiple loads of the module by ignoring failures to
1438          * create the bonding_masters sysfs file.  Bonding devices
1439          * created by second or subsequent loads of the module will
1440          * not be listed in, or controllable by, bonding_masters, but
1441          * will have the usual "bonding" sysfs directory.
1442          *
1443          * This is done to preserve backwards compatibility for
1444          * initscripts/sysconfig, which load bonding multiple times to
1445          * configure multiple bonding devices.
1446          */
1447         if (ret == -EEXIST) {
1448                 netdev_class = NULL;
1449                 return 0;
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